Merge tag 'trace-printf-v6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/trace...

[drm/drm-misc.git] / drivers / net / ethernet / intel / i40e / i40e_main.c

// SPDX-License-Identifier: GPL-2.0
/* Copyright(c) 2013 - 2021 Intel Corporation. */

#include <generated/utsrelease.h>
#include <linux/crash_dump.h>
#include <linux/if_bridge.h>
#include <linux/if_macvlan.h>
#include <linux/module.h>
#include <net/pkt_cls.h>
#include <net/xdp_sock_drv.h>

/* Local includes */
#include "i40e.h"
#include "i40e_devids.h"
#include "i40e_diag.h"
#include "i40e_lan_hmc.h"
#include "i40e_virtchnl_pf.h"
#include "i40e_xsk.h"

/* All i40e tracepoints are defined by the include below, which
 * must be included exactly once across the whole kernel with
 * CREATE_TRACE_POINTS defined
 */
#define CREATE_TRACE_POINTS
#include "i40e_trace.h"

const char i40e_driver_name[] = "i40e";
static const char i40e_driver_string[] =
                        "Intel(R) Ethernet Connection XL710 Network Driver";

static const char i40e_copyright[] = "Copyright (c) 2013 - 2019 Intel Corporation.";

/* a bit of forward declarations */
static void i40e_vsi_reinit_locked(struct i40e_vsi *vsi);
static void i40e_handle_reset_warning(struct i40e_pf *pf, bool lock_acquired);
static int i40e_add_vsi(struct i40e_vsi *vsi);
static int i40e_add_veb(struct i40e_veb *veb, struct i40e_vsi *vsi);
static int i40e_setup_pf_switch(struct i40e_pf *pf, bool reinit, bool lock_acquired);
static int i40e_setup_misc_vector(struct i40e_pf *pf);
static void i40e_determine_queue_usage(struct i40e_pf *pf);
static int i40e_setup_pf_filter_control(struct i40e_pf *pf);
static void i40e_prep_for_reset(struct i40e_pf *pf);
static void i40e_reset_and_rebuild(struct i40e_pf *pf, bool reinit,
                                   bool lock_acquired);
static int i40e_reset(struct i40e_pf *pf);
static void i40e_rebuild(struct i40e_pf *pf, bool reinit, bool lock_acquired);
static int i40e_setup_misc_vector_for_recovery_mode(struct i40e_pf *pf);
static int i40e_restore_interrupt_scheme(struct i40e_pf *pf);
static bool i40e_check_recovery_mode(struct i40e_pf *pf);
static int i40e_init_recovery_mode(struct i40e_pf *pf, struct i40e_hw *hw);
static void i40e_fdir_sb_setup(struct i40e_pf *pf);
static int i40e_veb_get_bw_info(struct i40e_veb *veb);
static int i40e_get_capabilities(struct i40e_pf *pf,
                                 enum i40e_admin_queue_opc list_type);
static bool i40e_is_total_port_shutdown_enabled(struct i40e_pf *pf);

/* i40e_pci_tbl - PCI Device ID Table
 *
 * Last entry must be all 0s
 *
 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
 *   Class, Class Mask, private data (not used) }
 */
static const struct pci_device_id i40e_pci_tbl[] = {
        {PCI_VDEVICE(INTEL, I40E_DEV_ID_SFP_XL710), 0},
        {PCI_VDEVICE(INTEL, I40E_DEV_ID_QEMU), 0},
        {PCI_VDEVICE(INTEL, I40E_DEV_ID_KX_B), 0},
        {PCI_VDEVICE(INTEL, I40E_DEV_ID_KX_C), 0},
        {PCI_VDEVICE(INTEL, I40E_DEV_ID_QSFP_A), 0},
        {PCI_VDEVICE(INTEL, I40E_DEV_ID_QSFP_B), 0},
        {PCI_VDEVICE(INTEL, I40E_DEV_ID_QSFP_C), 0},
        {PCI_VDEVICE(INTEL, I40E_DEV_ID_1G_BASE_T_BC), 0},
        {PCI_VDEVICE(INTEL, I40E_DEV_ID_10G_BASE_T), 0},
        {PCI_VDEVICE(INTEL, I40E_DEV_ID_10G_BASE_T4), 0},
        {PCI_VDEVICE(INTEL, I40E_DEV_ID_10G_BASE_T_BC), 0},
        {PCI_VDEVICE(INTEL, I40E_DEV_ID_10G_SFP), 0},
        {PCI_VDEVICE(INTEL, I40E_DEV_ID_10G_B), 0},
        {PCI_VDEVICE(INTEL, I40E_DEV_ID_KX_X722), 0},
        {PCI_VDEVICE(INTEL, I40E_DEV_ID_QSFP_X722), 0},
        {PCI_VDEVICE(INTEL, I40E_DEV_ID_SFP_X722), 0},
        {PCI_VDEVICE(INTEL, I40E_DEV_ID_1G_BASE_T_X722), 0},
        {PCI_VDEVICE(INTEL, I40E_DEV_ID_10G_BASE_T_X722), 0},
        {PCI_VDEVICE(INTEL, I40E_DEV_ID_SFP_I_X722), 0},
        {PCI_VDEVICE(INTEL, I40E_DEV_ID_SFP_X722_A), 0},
        {PCI_VDEVICE(INTEL, I40E_DEV_ID_20G_KR2), 0},
        {PCI_VDEVICE(INTEL, I40E_DEV_ID_20G_KR2_A), 0},
        {PCI_VDEVICE(INTEL, I40E_DEV_ID_X710_N3000), 0},
        {PCI_VDEVICE(INTEL, I40E_DEV_ID_XXV710_N3000), 0},
        {PCI_VDEVICE(INTEL, I40E_DEV_ID_25G_B), 0},
        {PCI_VDEVICE(INTEL, I40E_DEV_ID_25G_SFP28), 0},
        /* required last entry */
        {0, }
};
MODULE_DEVICE_TABLE(pci, i40e_pci_tbl);

#define I40E_MAX_VF_COUNT 128
static int debug = -1;
module_param(debug, uint, 0);
MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all), Debug mask (0x8XXXXXXX)");

MODULE_DESCRIPTION("Intel(R) Ethernet Connection XL710 Network Driver");
MODULE_IMPORT_NS(LIBIE);
MODULE_LICENSE("GPL v2");

static struct workqueue_struct *i40e_wq;

static void netdev_hw_addr_refcnt(struct i40e_mac_filter *f,
                                  struct net_device *netdev, int delta)
{
        struct netdev_hw_addr_list *ha_list;
        struct netdev_hw_addr *ha;

        if (!f || !netdev)
                return;

        if (is_unicast_ether_addr(f->macaddr) || is_link_local_ether_addr(f->macaddr))
                ha_list = &netdev->uc;
        else
                ha_list = &netdev->mc;

        netdev_hw_addr_list_for_each(ha, ha_list) {
                if (ether_addr_equal(ha->addr, f->macaddr)) {
                        ha->refcount += delta;
                        if (ha->refcount <= 0)
                                ha->refcount = 1;
                        break;
                }
        }
}

/**
 * i40e_hw_to_dev - get device pointer from the hardware structure
 * @hw: pointer to the device HW structure
 **/
struct device *i40e_hw_to_dev(struct i40e_hw *hw)
{
        struct i40e_pf *pf = i40e_hw_to_pf(hw);

        return &pf->pdev->dev;
}

/**
 * i40e_allocate_dma_mem - OS specific memory alloc for shared code
 * @hw:   pointer to the HW structure
 * @mem:  ptr to mem struct to fill out
 * @size: size of memory requested
 * @alignment: what to align the allocation to
 **/
int i40e_allocate_dma_mem(struct i40e_hw *hw, struct i40e_dma_mem *mem,
                          u64 size, u32 alignment)
{
        struct i40e_pf *pf = i40e_hw_to_pf(hw);

        mem->size = ALIGN(size, alignment);
        mem->va = dma_alloc_coherent(&pf->pdev->dev, mem->size, &mem->pa,
                                     GFP_KERNEL);
        if (!mem->va)
                return -ENOMEM;

        return 0;
}

/**
 * i40e_free_dma_mem - OS specific memory free for shared code
 * @hw:   pointer to the HW structure
 * @mem:  ptr to mem struct to free
 **/
int i40e_free_dma_mem(struct i40e_hw *hw, struct i40e_dma_mem *mem)
{
        struct i40e_pf *pf = i40e_hw_to_pf(hw);

        dma_free_coherent(&pf->pdev->dev, mem->size, mem->va, mem->pa);
        mem->va = NULL;
        mem->pa = 0;
        mem->size = 0;

        return 0;
}

/**
 * i40e_allocate_virt_mem - OS specific memory alloc for shared code
 * @hw:   pointer to the HW structure
 * @mem:  ptr to mem struct to fill out
 * @size: size of memory requested
 **/
int i40e_allocate_virt_mem(struct i40e_hw *hw, struct i40e_virt_mem *mem,
                           u32 size)
{
        mem->size = size;
        mem->va = kzalloc(size, GFP_KERNEL);

        if (!mem->va)
                return -ENOMEM;

        return 0;
}

/**
 * i40e_free_virt_mem - OS specific memory free for shared code
 * @hw:   pointer to the HW structure
 * @mem:  ptr to mem struct to free
 **/
int i40e_free_virt_mem(struct i40e_hw *hw, struct i40e_virt_mem *mem)
{
        /* it's ok to kfree a NULL pointer */
        kfree(mem->va);
        mem->va = NULL;
        mem->size = 0;

        return 0;
}

/**
 * i40e_get_lump - find a lump of free generic resource
 * @pf: board private structure
 * @pile: the pile of resource to search
 * @needed: the number of items needed
 * @id: an owner id to stick on the items assigned
 *
 * Returns the base item index of the lump, or negative for error
 **/
static int i40e_get_lump(struct i40e_pf *pf, struct i40e_lump_tracking *pile,
                         u16 needed, u16 id)
{
        int ret = -ENOMEM;
        int i, j;

        if (!pile || needed == 0 || id >= I40E_PILE_VALID_BIT) {
                dev_info(&pf->pdev->dev,
                         "param err: pile=%s needed=%d id=0x%04x\n",
                         pile ? "<valid>" : "<null>", needed, id);
                return -EINVAL;
        }

        /* Allocate last queue in the pile for FDIR VSI queue
         * so it doesn't fragment the qp_pile
         */
        if (pile == pf->qp_pile && pf->vsi[id]->type == I40E_VSI_FDIR) {
                if (pile->list[pile->num_entries - 1] & I40E_PILE_VALID_BIT) {
                        dev_err(&pf->pdev->dev,
                                "Cannot allocate queue %d for I40E_VSI_FDIR\n",
                                pile->num_entries - 1);
                        return -ENOMEM;
                }
                pile->list[pile->num_entries - 1] = id | I40E_PILE_VALID_BIT;
                return pile->num_entries - 1;
        }

        i = 0;
        while (i < pile->num_entries) {
                /* skip already allocated entries */
                if (pile->list[i] & I40E_PILE_VALID_BIT) {
                        i++;
                        continue;
                }

                /* do we have enough in this lump? */
                for (j = 0; (j < needed) && ((i+j) < pile->num_entries); j++) {
                        if (pile->list[i+j] & I40E_PILE_VALID_BIT)
                                break;
                }

                if (j == needed) {
                        /* there was enough, so assign it to the requestor */
                        for (j = 0; j < needed; j++)
                                pile->list[i+j] = id | I40E_PILE_VALID_BIT;
                        ret = i;
                        break;
                }

                /* not enough, so skip over it and continue looking */
                i += j;
        }

        return ret;
}

/**
 * i40e_put_lump - return a lump of generic resource
 * @pile: the pile of resource to search
 * @index: the base item index
 * @id: the owner id of the items assigned
 *
 * Returns the count of items in the lump
 **/
static int i40e_put_lump(struct i40e_lump_tracking *pile, u16 index, u16 id)
{
        int valid_id = (id | I40E_PILE_VALID_BIT);
        int count = 0;
        u16 i;

        if (!pile || index >= pile->num_entries)
                return -EINVAL;

        for (i = index;
             i < pile->num_entries && pile->list[i] == valid_id;
             i++) {
                pile->list[i] = 0;
                count++;
        }


        return count;
}

/**
 * i40e_find_vsi_from_id - searches for the vsi with the given id
 * @pf: the pf structure to search for the vsi
 * @id: id of the vsi it is searching for
 **/
struct i40e_vsi *i40e_find_vsi_from_id(struct i40e_pf *pf, u16 id)
{
        struct i40e_vsi *vsi;
        int i;

        i40e_pf_for_each_vsi(pf, i, vsi)
                if (vsi->id == id)
                        return vsi;

        return NULL;
}

/**
 * i40e_service_event_schedule - Schedule the service task to wake up
 * @pf: board private structure
 *
 * If not already scheduled, this puts the task into the work queue
 **/
void i40e_service_event_schedule(struct i40e_pf *pf)
{
        if ((!test_bit(__I40E_DOWN, pf->state) &&
             !test_bit(__I40E_RESET_RECOVERY_PENDING, pf->state)) ||
              test_bit(__I40E_RECOVERY_MODE, pf->state))
                queue_work(i40e_wq, &pf->service_task);
}

/**
 * i40e_tx_timeout - Respond to a Tx Hang
 * @netdev: network interface device structure
 * @txqueue: queue number timing out
 *
 * If any port has noticed a Tx timeout, it is likely that the whole
 * device is munged, not just the one netdev port, so go for the full
 * reset.
 **/
static void i40e_tx_timeout(struct net_device *netdev, unsigned int txqueue)
{
        struct i40e_netdev_priv *np = netdev_priv(netdev);
        struct i40e_vsi *vsi = np->vsi;
        struct i40e_pf *pf = vsi->back;
        struct i40e_ring *tx_ring = NULL;
        unsigned int i;
        u32 head, val;

        pf->tx_timeout_count++;

        /* with txqueue index, find the tx_ring struct */
        for (i = 0; i < vsi->num_queue_pairs; i++) {
                if (vsi->tx_rings[i] && vsi->tx_rings[i]->desc) {
                        if (txqueue ==
                            vsi->tx_rings[i]->queue_index) {
                                tx_ring = vsi->tx_rings[i];
                                break;
                        }
                }
        }

        if (time_after(jiffies, (pf->tx_timeout_last_recovery + HZ*20)))
                pf->tx_timeout_recovery_level = 1;  /* reset after some time */
        else if (time_before(jiffies,
                      (pf->tx_timeout_last_recovery + netdev->watchdog_timeo)))
                return;   /* don't do any new action before the next timeout */

        /* don't kick off another recovery if one is already pending */
        if (test_and_set_bit(__I40E_TIMEOUT_RECOVERY_PENDING, pf->state))
                return;

        if (tx_ring) {
                head = i40e_get_head(tx_ring);
                /* Read interrupt register */
                if (test_bit(I40E_FLAG_MSIX_ENA, pf->flags))
                        val = rd32(&pf->hw,
                             I40E_PFINT_DYN_CTLN(tx_ring->q_vector->v_idx +
                                                tx_ring->vsi->base_vector - 1));
                else
                        val = rd32(&pf->hw, I40E_PFINT_DYN_CTL0);

                netdev_info(netdev, "tx_timeout: VSI_seid: %d, Q %d, NTC: 0x%x, HWB: 0x%x, NTU: 0x%x, TAIL: 0x%x, INT: 0x%x\n",
                            vsi->seid, txqueue, tx_ring->next_to_clean,
                            head, tx_ring->next_to_use,
                            readl(tx_ring->tail), val);
        }

        pf->tx_timeout_last_recovery = jiffies;
        netdev_info(netdev, "tx_timeout recovery level %d, txqueue %d\n",
                    pf->tx_timeout_recovery_level, txqueue);

        switch (pf->tx_timeout_recovery_level) {
        case 1:
                set_bit(__I40E_PF_RESET_REQUESTED, pf->state);
                break;
        case 2:
                set_bit(__I40E_CORE_RESET_REQUESTED, pf->state);
                break;
        case 3:
                set_bit(__I40E_GLOBAL_RESET_REQUESTED, pf->state);
                break;
        default:
                netdev_err(netdev, "tx_timeout recovery unsuccessful, device is in non-recoverable state.\n");
                set_bit(__I40E_DOWN_REQUESTED, pf->state);
                set_bit(__I40E_VSI_DOWN_REQUESTED, vsi->state);
                break;
        }

        i40e_service_event_schedule(pf);
        pf->tx_timeout_recovery_level++;
}

/**
 * i40e_get_vsi_stats_struct - Get System Network Statistics
 * @vsi: the VSI we care about
 *
 * Returns the address of the device statistics structure.
 * The statistics are actually updated from the service task.
 **/
struct rtnl_link_stats64 *i40e_get_vsi_stats_struct(struct i40e_vsi *vsi)
{
        return &vsi->net_stats;
}

/**
 * i40e_get_netdev_stats_struct_tx - populate stats from a Tx ring
 * @ring: Tx ring to get statistics from
 * @stats: statistics entry to be updated
 **/
static void i40e_get_netdev_stats_struct_tx(struct i40e_ring *ring,
                                            struct rtnl_link_stats64 *stats)
{
        u64 bytes, packets;
        unsigned int start;

        do {
                start = u64_stats_fetch_begin(&ring->syncp);
                packets = ring->stats.packets;
                bytes   = ring->stats.bytes;
        } while (u64_stats_fetch_retry(&ring->syncp, start));

        stats->tx_packets += packets;
        stats->tx_bytes   += bytes;
}

/**
 * i40e_get_netdev_stats_struct - Get statistics for netdev interface
 * @netdev: network interface device structure
 * @stats: data structure to store statistics
 *
 * Returns the address of the device statistics structure.
 * The statistics are actually updated from the service task.
 **/
static void i40e_get_netdev_stats_struct(struct net_device *netdev,
                                  struct rtnl_link_stats64 *stats)
{
        struct i40e_netdev_priv *np = netdev_priv(netdev);
        struct i40e_vsi *vsi = np->vsi;
        struct rtnl_link_stats64 *vsi_stats = i40e_get_vsi_stats_struct(vsi);
        struct i40e_ring *ring;
        int i;

        if (test_bit(__I40E_VSI_DOWN, vsi->state))
                return;

        if (!vsi->tx_rings)
                return;

        rcu_read_lock();
        for (i = 0; i < vsi->num_queue_pairs; i++) {
                u64 bytes, packets;
                unsigned int start;

                ring = READ_ONCE(vsi->tx_rings[i]);
                if (!ring)
                        continue;
                i40e_get_netdev_stats_struct_tx(ring, stats);

                if (i40e_enabled_xdp_vsi(vsi)) {
                        ring = READ_ONCE(vsi->xdp_rings[i]);
                        if (!ring)
                                continue;
                        i40e_get_netdev_stats_struct_tx(ring, stats);
                }

                ring = READ_ONCE(vsi->rx_rings[i]);
                if (!ring)
                        continue;
                do {
                        start   = u64_stats_fetch_begin(&ring->syncp);
                        packets = ring->stats.packets;
                        bytes   = ring->stats.bytes;
                } while (u64_stats_fetch_retry(&ring->syncp, start));

                stats->rx_packets += packets;
                stats->rx_bytes   += bytes;

        }
        rcu_read_unlock();

        /* following stats updated by i40e_watchdog_subtask() */
        stats->multicast        = vsi_stats->multicast;
        stats->tx_errors        = vsi_stats->tx_errors;
        stats->tx_dropped       = vsi_stats->tx_dropped;
        stats->rx_errors        = vsi_stats->rx_errors;
        stats->rx_dropped       = vsi_stats->rx_dropped;
        stats->rx_missed_errors = vsi_stats->rx_missed_errors;
        stats->rx_crc_errors    = vsi_stats->rx_crc_errors;
        stats->rx_length_errors = vsi_stats->rx_length_errors;
}

/**
 * i40e_vsi_reset_stats - Resets all stats of the given vsi
 * @vsi: the VSI to have its stats reset
 **/
void i40e_vsi_reset_stats(struct i40e_vsi *vsi)
{
        struct rtnl_link_stats64 *ns;
        int i;

        if (!vsi)
                return;

        ns = i40e_get_vsi_stats_struct(vsi);
        memset(ns, 0, sizeof(*ns));
        memset(&vsi->net_stats_offsets, 0, sizeof(vsi->net_stats_offsets));
        memset(&vsi->eth_stats, 0, sizeof(vsi->eth_stats));
        memset(&vsi->eth_stats_offsets, 0, sizeof(vsi->eth_stats_offsets));
        if (vsi->rx_rings && vsi->rx_rings[0]) {
                for (i = 0; i < vsi->num_queue_pairs; i++) {
                        memset(&vsi->rx_rings[i]->stats, 0,
                               sizeof(vsi->rx_rings[i]->stats));
                        memset(&vsi->rx_rings[i]->rx_stats, 0,
                               sizeof(vsi->rx_rings[i]->rx_stats));
                        memset(&vsi->tx_rings[i]->stats, 0,
                               sizeof(vsi->tx_rings[i]->stats));
                        memset(&vsi->tx_rings[i]->tx_stats, 0,
                               sizeof(vsi->tx_rings[i]->tx_stats));
                }
        }
        vsi->stat_offsets_loaded = false;
}

/**
 * i40e_pf_reset_stats - Reset all of the stats for the given PF
 * @pf: the PF to be reset
 **/
void i40e_pf_reset_stats(struct i40e_pf *pf)
{
        struct i40e_veb *veb;
        int i;

        memset(&pf->stats, 0, sizeof(pf->stats));
        memset(&pf->stats_offsets, 0, sizeof(pf->stats_offsets));
        pf->stat_offsets_loaded = false;

        i40e_pf_for_each_veb(pf, i, veb) {
                memset(&veb->stats, 0, sizeof(veb->stats));
                memset(&veb->stats_offsets, 0, sizeof(veb->stats_offsets));
                memset(&veb->tc_stats, 0, sizeof(veb->tc_stats));
                memset(&veb->tc_stats_offsets, 0, sizeof(veb->tc_stats_offsets));
                veb->stat_offsets_loaded = false;
        }
        pf->hw_csum_rx_error = 0;
}

/**
 * i40e_compute_pci_to_hw_id - compute index form PCI function.
 * @vsi: ptr to the VSI to read from.
 * @hw: ptr to the hardware info.
 **/
static u32 i40e_compute_pci_to_hw_id(struct i40e_vsi *vsi, struct i40e_hw *hw)
{
        int pf_count = i40e_get_pf_count(hw);

        if (vsi->type == I40E_VSI_SRIOV)
                return (hw->port * BIT(7)) / pf_count + vsi->vf_id;

        return hw->port + BIT(7);
}

/**
 * i40e_stat_update64 - read and update a 64 bit stat from the chip.
 * @hw: ptr to the hardware info.
 * @hireg: the high 32 bit reg to read.
 * @loreg: the low 32 bit reg to read.
 * @offset_loaded: has the initial offset been loaded yet.
 * @offset: ptr to current offset value.
 * @stat: ptr to the stat.
 *
 * Since the device stats are not reset at PFReset, they will not
 * be zeroed when the driver starts.  We'll save the first values read
 * and use them as offsets to be subtracted from the raw values in order
 * to report stats that count from zero.
 **/
static void i40e_stat_update64(struct i40e_hw *hw, u32 hireg, u32 loreg,
                               bool offset_loaded, u64 *offset, u64 *stat)
{
        u64 new_data;

        new_data = rd64(hw, loreg);

        if (!offset_loaded || new_data < *offset)
                *offset = new_data;
        *stat = new_data - *offset;
}

/**
 * i40e_stat_update48 - read and update a 48 bit stat from the chip
 * @hw: ptr to the hardware info
 * @hireg: the high 32 bit reg to read
 * @loreg: the low 32 bit reg to read
 * @offset_loaded: has the initial offset been loaded yet
 * @offset: ptr to current offset value
 * @stat: ptr to the stat
 *
 * Since the device stats are not reset at PFReset, they likely will not
 * be zeroed when the driver starts.  We'll save the first values read
 * and use them as offsets to be subtracted from the raw values in order
 * to report stats that count from zero.  In the process, we also manage
 * the potential roll-over.
 **/
static void i40e_stat_update48(struct i40e_hw *hw, u32 hireg, u32 loreg,
                               bool offset_loaded, u64 *offset, u64 *stat)
{
        u64 new_data;

        if (hw->device_id == I40E_DEV_ID_QEMU) {
                new_data = rd32(hw, loreg);
                new_data |= ((u64)(rd32(hw, hireg) & 0xFFFF)) << 32;
        } else {
                new_data = rd64(hw, loreg);
        }
        if (!offset_loaded)
                *offset = new_data;
        if (likely(new_data >= *offset))
                *stat = new_data - *offset;
        else
                *stat = (new_data + BIT_ULL(48)) - *offset;
        *stat &= 0xFFFFFFFFFFFFULL;
}

/**
 * i40e_stat_update32 - read and update a 32 bit stat from the chip
 * @hw: ptr to the hardware info
 * @reg: the hw reg to read
 * @offset_loaded: has the initial offset been loaded yet
 * @offset: ptr to current offset value
 * @stat: ptr to the stat
 **/
static void i40e_stat_update32(struct i40e_hw *hw, u32 reg,
                               bool offset_loaded, u64 *offset, u64 *stat)
{
        u32 new_data;

        new_data = rd32(hw, reg);
        if (!offset_loaded)
                *offset = new_data;
        if (likely(new_data >= *offset))
                *stat = (u32)(new_data - *offset);
        else
                *stat = (u32)((new_data + BIT_ULL(32)) - *offset);
}

/**
 * i40e_stat_update_and_clear32 - read and clear hw reg, update a 32 bit stat
 * @hw: ptr to the hardware info
 * @reg: the hw reg to read and clear
 * @stat: ptr to the stat
 **/
static void i40e_stat_update_and_clear32(struct i40e_hw *hw, u32 reg, u64 *stat)
{
        u32 new_data = rd32(hw, reg);

        wr32(hw, reg, 1); /* must write a nonzero value to clear register */
        *stat += new_data;
}

/**
 * i40e_stats_update_rx_discards - update rx_discards.
 * @vsi: ptr to the VSI to be updated.
 * @hw: ptr to the hardware info.
 * @stat_idx: VSI's stat_counter_idx.
 * @offset_loaded: ptr to the VSI's stat_offsets_loaded.
 * @stat_offset: ptr to stat_offset to store first read of specific register.
 * @stat: ptr to VSI's stat to be updated.
 **/
static void
i40e_stats_update_rx_discards(struct i40e_vsi *vsi, struct i40e_hw *hw,
                              int stat_idx, bool offset_loaded,
                              struct i40e_eth_stats *stat_offset,
                              struct i40e_eth_stats *stat)
{
        i40e_stat_update32(hw, I40E_GLV_RDPC(stat_idx), offset_loaded,
                           &stat_offset->rx_discards, &stat->rx_discards);
        i40e_stat_update64(hw,
                           I40E_GL_RXERR1H(i40e_compute_pci_to_hw_id(vsi, hw)),
                           I40E_GL_RXERR1L(i40e_compute_pci_to_hw_id(vsi, hw)),
                           offset_loaded, &stat_offset->rx_discards_other,
                           &stat->rx_discards_other);
}

/**
 * i40e_update_eth_stats - Update VSI-specific ethernet statistics counters.
 * @vsi: the VSI to be updated
 **/
void i40e_update_eth_stats(struct i40e_vsi *vsi)
{
        int stat_idx = le16_to_cpu(vsi->info.stat_counter_idx);
        struct i40e_pf *pf = vsi->back;
        struct i40e_hw *hw = &pf->hw;
        struct i40e_eth_stats *oes;
        struct i40e_eth_stats *es;     /* device's eth stats */

        es = &vsi->eth_stats;
        oes = &vsi->eth_stats_offsets;

        /* Gather up the stats that the hw collects */
        i40e_stat_update32(hw, I40E_GLV_TEPC(stat_idx),
                           vsi->stat_offsets_loaded,
                           &oes->tx_errors, &es->tx_errors);
        i40e_stat_update32(hw, I40E_GLV_RUPP(stat_idx),
                           vsi->stat_offsets_loaded,
                           &oes->rx_unknown_protocol, &es->rx_unknown_protocol);

        i40e_stat_update48(hw, I40E_GLV_GORCH(stat_idx),
                           I40E_GLV_GORCL(stat_idx),
                           vsi->stat_offsets_loaded,
                           &oes->rx_bytes, &es->rx_bytes);
        i40e_stat_update48(hw, I40E_GLV_UPRCH(stat_idx),
                           I40E_GLV_UPRCL(stat_idx),
                           vsi->stat_offsets_loaded,
                           &oes->rx_unicast, &es->rx_unicast);
        i40e_stat_update48(hw, I40E_GLV_MPRCH(stat_idx),
                           I40E_GLV_MPRCL(stat_idx),
                           vsi->stat_offsets_loaded,
                           &oes->rx_multicast, &es->rx_multicast);
        i40e_stat_update48(hw, I40E_GLV_BPRCH(stat_idx),
                           I40E_GLV_BPRCL(stat_idx),
                           vsi->stat_offsets_loaded,
                           &oes->rx_broadcast, &es->rx_broadcast);

        i40e_stat_update48(hw, I40E_GLV_GOTCH(stat_idx),
                           I40E_GLV_GOTCL(stat_idx),
                           vsi->stat_offsets_loaded,
                           &oes->tx_bytes, &es->tx_bytes);
        i40e_stat_update48(hw, I40E_GLV_UPTCH(stat_idx),
                           I40E_GLV_UPTCL(stat_idx),
                           vsi->stat_offsets_loaded,
                           &oes->tx_unicast, &es->tx_unicast);
        i40e_stat_update48(hw, I40E_GLV_MPTCH(stat_idx),
                           I40E_GLV_MPTCL(stat_idx),
                           vsi->stat_offsets_loaded,
                           &oes->tx_multicast, &es->tx_multicast);
        i40e_stat_update48(hw, I40E_GLV_BPTCH(stat_idx),
                           I40E_GLV_BPTCL(stat_idx),
                           vsi->stat_offsets_loaded,
                           &oes->tx_broadcast, &es->tx_broadcast);

        i40e_stats_update_rx_discards(vsi, hw, stat_idx,
                                      vsi->stat_offsets_loaded, oes, es);

        vsi->stat_offsets_loaded = true;
}

/**
 * i40e_update_veb_stats - Update Switch component statistics
 * @veb: the VEB being updated
 **/
void i40e_update_veb_stats(struct i40e_veb *veb)
{
        struct i40e_pf *pf = veb->pf;
        struct i40e_hw *hw = &pf->hw;
        struct i40e_eth_stats *oes;
        struct i40e_eth_stats *es;     /* device's eth stats */
        struct i40e_veb_tc_stats *veb_oes;
        struct i40e_veb_tc_stats *veb_es;
        int i, idx = 0;

        idx = veb->stats_idx;
        es = &veb->stats;
        oes = &veb->stats_offsets;
        veb_es = &veb->tc_stats;
        veb_oes = &veb->tc_stats_offsets;

        /* Gather up the stats that the hw collects */
        i40e_stat_update32(hw, I40E_GLSW_TDPC(idx),
                           veb->stat_offsets_loaded,
                           &oes->tx_discards, &es->tx_discards);
        if (hw->revision_id > 0)
                i40e_stat_update32(hw, I40E_GLSW_RUPP(idx),
                                   veb->stat_offsets_loaded,
                                   &oes->rx_unknown_protocol,
                                   &es->rx_unknown_protocol);
        i40e_stat_update48(hw, I40E_GLSW_GORCH(idx), I40E_GLSW_GORCL(idx),
                           veb->stat_offsets_loaded,
                           &oes->rx_bytes, &es->rx_bytes);
        i40e_stat_update48(hw, I40E_GLSW_UPRCH(idx), I40E_GLSW_UPRCL(idx),
                           veb->stat_offsets_loaded,
                           &oes->rx_unicast, &es->rx_unicast);
        i40e_stat_update48(hw, I40E_GLSW_MPRCH(idx), I40E_GLSW_MPRCL(idx),
                           veb->stat_offsets_loaded,
                           &oes->rx_multicast, &es->rx_multicast);
        i40e_stat_update48(hw, I40E_GLSW_BPRCH(idx), I40E_GLSW_BPRCL(idx),
                           veb->stat_offsets_loaded,
                           &oes->rx_broadcast, &es->rx_broadcast);

        i40e_stat_update48(hw, I40E_GLSW_GOTCH(idx), I40E_GLSW_GOTCL(idx),
                           veb->stat_offsets_loaded,
                           &oes->tx_bytes, &es->tx_bytes);
        i40e_stat_update48(hw, I40E_GLSW_UPTCH(idx), I40E_GLSW_UPTCL(idx),
                           veb->stat_offsets_loaded,
                           &oes->tx_unicast, &es->tx_unicast);
        i40e_stat_update48(hw, I40E_GLSW_MPTCH(idx), I40E_GLSW_MPTCL(idx),
                           veb->stat_offsets_loaded,
                           &oes->tx_multicast, &es->tx_multicast);
        i40e_stat_update48(hw, I40E_GLSW_BPTCH(idx), I40E_GLSW_BPTCL(idx),
                           veb->stat_offsets_loaded,
                           &oes->tx_broadcast, &es->tx_broadcast);
        for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
                i40e_stat_update48(hw, I40E_GLVEBTC_RPCH(i, idx),
                                   I40E_GLVEBTC_RPCL(i, idx),
                                   veb->stat_offsets_loaded,
                                   &veb_oes->tc_rx_packets[i],
                                   &veb_es->tc_rx_packets[i]);
                i40e_stat_update48(hw, I40E_GLVEBTC_RBCH(i, idx),
                                   I40E_GLVEBTC_RBCL(i, idx),
                                   veb->stat_offsets_loaded,
                                   &veb_oes->tc_rx_bytes[i],
                                   &veb_es->tc_rx_bytes[i]);
                i40e_stat_update48(hw, I40E_GLVEBTC_TPCH(i, idx),
                                   I40E_GLVEBTC_TPCL(i, idx),
                                   veb->stat_offsets_loaded,
                                   &veb_oes->tc_tx_packets[i],
                                   &veb_es->tc_tx_packets[i]);
                i40e_stat_update48(hw, I40E_GLVEBTC_TBCH(i, idx),
                                   I40E_GLVEBTC_TBCL(i, idx),
                                   veb->stat_offsets_loaded,
                                   &veb_oes->tc_tx_bytes[i],
                                   &veb_es->tc_tx_bytes[i]);
        }
        veb->stat_offsets_loaded = true;
}

/**
 * i40e_update_vsi_stats - Update the vsi statistics counters.
 * @vsi: the VSI to be updated
 *
 * There are a few instances where we store the same stat in a
 * couple of different structs.  This is partly because we have
 * the netdev stats that need to be filled out, which is slightly
 * different from the "eth_stats" defined by the chip and used in
 * VF communications.  We sort it out here.
 **/
static void i40e_update_vsi_stats(struct i40e_vsi *vsi)
{
        u64 rx_page, rx_buf, rx_reuse, rx_alloc, rx_waive, rx_busy;
        struct i40e_pf *pf = vsi->back;
        struct rtnl_link_stats64 *ons;
        struct rtnl_link_stats64 *ns;   /* netdev stats */
        struct i40e_eth_stats *oes;
        struct i40e_eth_stats *es;     /* device's eth stats */
        u64 tx_restart, tx_busy;
        struct i40e_ring *p;
        u64 bytes, packets;
        unsigned int start;
        u64 tx_linearize;
        u64 tx_force_wb;
        u64 tx_stopped;
        u64 rx_p, rx_b;
        u64 tx_p, tx_b;
        u16 q;

        if (test_bit(__I40E_VSI_DOWN, vsi->state) ||
            test_bit(__I40E_CONFIG_BUSY, pf->state))
                return;

        ns = i40e_get_vsi_stats_struct(vsi);
        ons = &vsi->net_stats_offsets;
        es = &vsi->eth_stats;
        oes = &vsi->eth_stats_offsets;

        /* Gather up the netdev and vsi stats that the driver collects
         * on the fly during packet processing
         */
        rx_b = rx_p = 0;
        tx_b = tx_p = 0;
        tx_restart = tx_busy = tx_linearize = tx_force_wb = 0;
        tx_stopped = 0;
        rx_page = 0;
        rx_buf = 0;
        rx_reuse = 0;
        rx_alloc = 0;
        rx_waive = 0;
        rx_busy = 0;
        rcu_read_lock();
        for (q = 0; q < vsi->num_queue_pairs; q++) {
                /* locate Tx ring */
                p = READ_ONCE(vsi->tx_rings[q]);
                if (!p)
                        continue;

                do {
                        start = u64_stats_fetch_begin(&p->syncp);
                        packets = p->stats.packets;
                        bytes = p->stats.bytes;
                } while (u64_stats_fetch_retry(&p->syncp, start));
                tx_b += bytes;
                tx_p += packets;
                tx_restart += p->tx_stats.restart_queue;
                tx_busy += p->tx_stats.tx_busy;
                tx_linearize += p->tx_stats.tx_linearize;
                tx_force_wb += p->tx_stats.tx_force_wb;
                tx_stopped += p->tx_stats.tx_stopped;

                /* locate Rx ring */
                p = READ_ONCE(vsi->rx_rings[q]);
                if (!p)
                        continue;

                do {
                        start = u64_stats_fetch_begin(&p->syncp);
                        packets = p->stats.packets;
                        bytes = p->stats.bytes;
                } while (u64_stats_fetch_retry(&p->syncp, start));
                rx_b += bytes;
                rx_p += packets;
                rx_buf += p->rx_stats.alloc_buff_failed;
                rx_page += p->rx_stats.alloc_page_failed;
                rx_reuse += p->rx_stats.page_reuse_count;
                rx_alloc += p->rx_stats.page_alloc_count;
                rx_waive += p->rx_stats.page_waive_count;
                rx_busy += p->rx_stats.page_busy_count;

                if (i40e_enabled_xdp_vsi(vsi)) {
                        /* locate XDP ring */
                        p = READ_ONCE(vsi->xdp_rings[q]);
                        if (!p)
                                continue;

                        do {
                                start = u64_stats_fetch_begin(&p->syncp);
                                packets = p->stats.packets;
                                bytes = p->stats.bytes;
                        } while (u64_stats_fetch_retry(&p->syncp, start));
                        tx_b += bytes;
                        tx_p += packets;
                        tx_restart += p->tx_stats.restart_queue;
                        tx_busy += p->tx_stats.tx_busy;
                        tx_linearize += p->tx_stats.tx_linearize;
                        tx_force_wb += p->tx_stats.tx_force_wb;
                }
        }
        rcu_read_unlock();
        vsi->tx_restart = tx_restart;
        vsi->tx_busy = tx_busy;
        vsi->tx_linearize = tx_linearize;
        vsi->tx_force_wb = tx_force_wb;
        vsi->tx_stopped = tx_stopped;
        vsi->rx_page_failed = rx_page;
        vsi->rx_buf_failed = rx_buf;
        vsi->rx_page_reuse = rx_reuse;
        vsi->rx_page_alloc = rx_alloc;
        vsi->rx_page_waive = rx_waive;
        vsi->rx_page_busy = rx_busy;

        ns->rx_packets = rx_p;
        ns->rx_bytes = rx_b;
        ns->tx_packets = tx_p;
        ns->tx_bytes = tx_b;

        /* update netdev stats from eth stats */
        i40e_update_eth_stats(vsi);
        ons->tx_errors = oes->tx_errors;
        ns->tx_errors = es->tx_errors;
        ons->multicast = oes->rx_multicast;
        ns->multicast = es->rx_multicast;
        ons->rx_dropped = oes->rx_discards_other;
        ns->rx_dropped = es->rx_discards_other;
        ons->rx_missed_errors = oes->rx_discards;
        ns->rx_missed_errors = es->rx_discards;
        ons->tx_dropped = oes->tx_discards;
        ns->tx_dropped = es->tx_discards;

        /* pull in a couple PF stats if this is the main vsi */
        if (vsi->type == I40E_VSI_MAIN) {
                ns->rx_crc_errors = pf->stats.crc_errors;
                ns->rx_errors = pf->stats.crc_errors + pf->stats.illegal_bytes;
                ns->rx_length_errors = pf->stats.rx_length_errors;
        }
}

/**
 * i40e_update_pf_stats - Update the PF statistics counters.
 * @pf: the PF to be updated
 **/
static void i40e_update_pf_stats(struct i40e_pf *pf)
{
        struct i40e_hw_port_stats *osd = &pf->stats_offsets;
        struct i40e_hw_port_stats *nsd = &pf->stats;
        struct i40e_hw *hw = &pf->hw;
        u32 val;
        int i;

        i40e_stat_update48(hw, I40E_GLPRT_GORCH(hw->port),
                           I40E_GLPRT_GORCL(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->eth.rx_bytes, &nsd->eth.rx_bytes);
        i40e_stat_update48(hw, I40E_GLPRT_GOTCH(hw->port),
                           I40E_GLPRT_GOTCL(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->eth.tx_bytes, &nsd->eth.tx_bytes);
        i40e_stat_update32(hw, I40E_GLPRT_RDPC(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->eth.rx_discards,
                           &nsd->eth.rx_discards);
        i40e_stat_update48(hw, I40E_GLPRT_UPRCH(hw->port),
                           I40E_GLPRT_UPRCL(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->eth.rx_unicast,
                           &nsd->eth.rx_unicast);
        i40e_stat_update48(hw, I40E_GLPRT_MPRCH(hw->port),
                           I40E_GLPRT_MPRCL(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->eth.rx_multicast,
                           &nsd->eth.rx_multicast);
        i40e_stat_update48(hw, I40E_GLPRT_BPRCH(hw->port),
                           I40E_GLPRT_BPRCL(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->eth.rx_broadcast,
                           &nsd->eth.rx_broadcast);
        i40e_stat_update48(hw, I40E_GLPRT_UPTCH(hw->port),
                           I40E_GLPRT_UPTCL(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->eth.tx_unicast,
                           &nsd->eth.tx_unicast);
        i40e_stat_update48(hw, I40E_GLPRT_MPTCH(hw->port),
                           I40E_GLPRT_MPTCL(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->eth.tx_multicast,
                           &nsd->eth.tx_multicast);
        i40e_stat_update48(hw, I40E_GLPRT_BPTCH(hw->port),
                           I40E_GLPRT_BPTCL(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->eth.tx_broadcast,
                           &nsd->eth.tx_broadcast);

        i40e_stat_update32(hw, I40E_GLPRT_TDOLD(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->tx_dropped_link_down,
                           &nsd->tx_dropped_link_down);

        i40e_stat_update32(hw, I40E_GLPRT_CRCERRS(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->crc_errors, &nsd->crc_errors);

        i40e_stat_update32(hw, I40E_GLPRT_ILLERRC(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->illegal_bytes, &nsd->illegal_bytes);

        i40e_stat_update32(hw, I40E_GLPRT_MLFC(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->mac_local_faults,
                           &nsd->mac_local_faults);
        i40e_stat_update32(hw, I40E_GLPRT_MRFC(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->mac_remote_faults,
                           &nsd->mac_remote_faults);

        i40e_stat_update32(hw, I40E_GLPRT_RLEC(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->rx_length_errors,
                           &nsd->rx_length_errors);

        i40e_stat_update32(hw, I40E_GLPRT_LXONRXC(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->link_xon_rx, &nsd->link_xon_rx);
        i40e_stat_update32(hw, I40E_GLPRT_LXONTXC(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->link_xon_tx, &nsd->link_xon_tx);
        i40e_stat_update32(hw, I40E_GLPRT_LXOFFRXC(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->link_xoff_rx, &nsd->link_xoff_rx);
        i40e_stat_update32(hw, I40E_GLPRT_LXOFFTXC(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->link_xoff_tx, &nsd->link_xoff_tx);

        for (i = 0; i < 8; i++) {
                i40e_stat_update32(hw, I40E_GLPRT_PXOFFRXC(hw->port, i),
                                   pf->stat_offsets_loaded,
                                   &osd->priority_xoff_rx[i],
                                   &nsd->priority_xoff_rx[i]);
                i40e_stat_update32(hw, I40E_GLPRT_PXONRXC(hw->port, i),
                                   pf->stat_offsets_loaded,
                                   &osd->priority_xon_rx[i],
                                   &nsd->priority_xon_rx[i]);
                i40e_stat_update32(hw, I40E_GLPRT_PXONTXC(hw->port, i),
                                   pf->stat_offsets_loaded,
                                   &osd->priority_xon_tx[i],
                                   &nsd->priority_xon_tx[i]);
                i40e_stat_update32(hw, I40E_GLPRT_PXOFFTXC(hw->port, i),
                                   pf->stat_offsets_loaded,
                                   &osd->priority_xoff_tx[i],
                                   &nsd->priority_xoff_tx[i]);
                i40e_stat_update32(hw,
                                   I40E_GLPRT_RXON2OFFCNT(hw->port, i),
                                   pf->stat_offsets_loaded,
                                   &osd->priority_xon_2_xoff[i],
                                   &nsd->priority_xon_2_xoff[i]);
        }

        i40e_stat_update48(hw, I40E_GLPRT_PRC64H(hw->port),
                           I40E_GLPRT_PRC64L(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->rx_size_64, &nsd->rx_size_64);
        i40e_stat_update48(hw, I40E_GLPRT_PRC127H(hw->port),
                           I40E_GLPRT_PRC127L(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->rx_size_127, &nsd->rx_size_127);
        i40e_stat_update48(hw, I40E_GLPRT_PRC255H(hw->port),
                           I40E_GLPRT_PRC255L(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->rx_size_255, &nsd->rx_size_255);
        i40e_stat_update48(hw, I40E_GLPRT_PRC511H(hw->port),
                           I40E_GLPRT_PRC511L(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->rx_size_511, &nsd->rx_size_511);
        i40e_stat_update48(hw, I40E_GLPRT_PRC1023H(hw->port),
                           I40E_GLPRT_PRC1023L(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->rx_size_1023, &nsd->rx_size_1023);
        i40e_stat_update48(hw, I40E_GLPRT_PRC1522H(hw->port),
                           I40E_GLPRT_PRC1522L(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->rx_size_1522, &nsd->rx_size_1522);
        i40e_stat_update48(hw, I40E_GLPRT_PRC9522H(hw->port),
                           I40E_GLPRT_PRC9522L(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->rx_size_big, &nsd->rx_size_big);

        i40e_stat_update48(hw, I40E_GLPRT_PTC64H(hw->port),
                           I40E_GLPRT_PTC64L(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->tx_size_64, &nsd->tx_size_64);
        i40e_stat_update48(hw, I40E_GLPRT_PTC127H(hw->port),
                           I40E_GLPRT_PTC127L(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->tx_size_127, &nsd->tx_size_127);
        i40e_stat_update48(hw, I40E_GLPRT_PTC255H(hw->port),
                           I40E_GLPRT_PTC255L(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->tx_size_255, &nsd->tx_size_255);
        i40e_stat_update48(hw, I40E_GLPRT_PTC511H(hw->port),
                           I40E_GLPRT_PTC511L(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->tx_size_511, &nsd->tx_size_511);
        i40e_stat_update48(hw, I40E_GLPRT_PTC1023H(hw->port),
                           I40E_GLPRT_PTC1023L(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->tx_size_1023, &nsd->tx_size_1023);
        i40e_stat_update48(hw, I40E_GLPRT_PTC1522H(hw->port),
                           I40E_GLPRT_PTC1522L(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->tx_size_1522, &nsd->tx_size_1522);
        i40e_stat_update48(hw, I40E_GLPRT_PTC9522H(hw->port),
                           I40E_GLPRT_PTC9522L(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->tx_size_big, &nsd->tx_size_big);

        i40e_stat_update32(hw, I40E_GLPRT_RUC(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->rx_undersize, &nsd->rx_undersize);
        i40e_stat_update32(hw, I40E_GLPRT_RFC(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->rx_fragments, &nsd->rx_fragments);
        i40e_stat_update32(hw, I40E_GLPRT_ROC(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->rx_oversize, &nsd->rx_oversize);
        i40e_stat_update32(hw, I40E_GLPRT_RJC(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->rx_jabber, &nsd->rx_jabber);

        /* FDIR stats */
        i40e_stat_update_and_clear32(hw,
                        I40E_GLQF_PCNT(I40E_FD_ATR_STAT_IDX(hw->pf_id)),
                        &nsd->fd_atr_match);
        i40e_stat_update_and_clear32(hw,
                        I40E_GLQF_PCNT(I40E_FD_SB_STAT_IDX(hw->pf_id)),
                        &nsd->fd_sb_match);
        i40e_stat_update_and_clear32(hw,
                        I40E_GLQF_PCNT(I40E_FD_ATR_TUNNEL_STAT_IDX(hw->pf_id)),
                        &nsd->fd_atr_tunnel_match);

        val = rd32(hw, I40E_PRTPM_EEE_STAT);
        nsd->tx_lpi_status =
                       FIELD_GET(I40E_PRTPM_EEE_STAT_TX_LPI_STATUS_MASK, val);
        nsd->rx_lpi_status =
                       FIELD_GET(I40E_PRTPM_EEE_STAT_RX_LPI_STATUS_MASK, val);
        i40e_stat_update32(hw, I40E_PRTPM_TLPIC,
                           pf->stat_offsets_loaded,
                           &osd->tx_lpi_count, &nsd->tx_lpi_count);
        i40e_stat_update32(hw, I40E_PRTPM_RLPIC,
                           pf->stat_offsets_loaded,
                           &osd->rx_lpi_count, &nsd->rx_lpi_count);

        if (test_bit(I40E_FLAG_FD_SB_ENA, pf->flags) &&
            !test_bit(__I40E_FD_SB_AUTO_DISABLED, pf->state))
                nsd->fd_sb_status = true;
        else
                nsd->fd_sb_status = false;

        if (test_bit(I40E_FLAG_FD_ATR_ENA, pf->flags) &&
            !test_bit(__I40E_FD_ATR_AUTO_DISABLED, pf->state))
                nsd->fd_atr_status = true;
        else
                nsd->fd_atr_status = false;

        pf->stat_offsets_loaded = true;
}

/**
 * i40e_update_stats - Update the various statistics counters.
 * @vsi: the VSI to be updated
 *
 * Update the various stats for this VSI and its related entities.
 **/
void i40e_update_stats(struct i40e_vsi *vsi)
{
        struct i40e_pf *pf = vsi->back;

        if (vsi->type == I40E_VSI_MAIN)
                i40e_update_pf_stats(pf);

        i40e_update_vsi_stats(vsi);
}

/**
 * i40e_count_filters - counts VSI mac filters
 * @vsi: the VSI to be searched
 *
 * Returns count of mac filters
 **/
int i40e_count_filters(struct i40e_vsi *vsi)
{
        struct i40e_mac_filter *f;
        struct hlist_node *h;
        int bkt;
        int cnt = 0;

        hash_for_each_safe(vsi->mac_filter_hash, bkt, h, f, hlist) {
                if (f->state == I40E_FILTER_NEW ||
                    f->state == I40E_FILTER_NEW_SYNC ||
                    f->state == I40E_FILTER_ACTIVE)
                        ++cnt;
        }

        return cnt;
}

/**
 * i40e_find_filter - Search VSI filter list for specific mac/vlan filter
 * @vsi: the VSI to be searched
 * @macaddr: the MAC address
 * @vlan: the vlan
 *
 * Returns ptr to the filter object or NULL
 **/
static struct i40e_mac_filter *i40e_find_filter(struct i40e_vsi *vsi,
                                                const u8 *macaddr, s16 vlan)
{
        struct i40e_mac_filter *f;
        u64 key;

        if (!vsi || !macaddr)
                return NULL;

        key = i40e_addr_to_hkey(macaddr);
        hash_for_each_possible(vsi->mac_filter_hash, f, hlist, key) {
                if ((ether_addr_equal(macaddr, f->macaddr)) &&
                    (vlan == f->vlan))
                        return f;
        }
        return NULL;
}

/**
 * i40e_find_mac - Find a mac addr in the macvlan filters list
 * @vsi: the VSI to be searched
 * @macaddr: the MAC address we are searching for
 *
 * Returns the first filter with the provided MAC address or NULL if
 * MAC address was not found
 **/
struct i40e_mac_filter *i40e_find_mac(struct i40e_vsi *vsi, const u8 *macaddr)
{
        struct i40e_mac_filter *f;
        u64 key;

        if (!vsi || !macaddr)
                return NULL;

        key = i40e_addr_to_hkey(macaddr);
        hash_for_each_possible(vsi->mac_filter_hash, f, hlist, key) {
                if ((ether_addr_equal(macaddr, f->macaddr)))
                        return f;
        }
        return NULL;
}

/**
 * i40e_is_vsi_in_vlan - Check if VSI is in vlan mode
 * @vsi: the VSI to be searched
 *
 * Returns true if VSI is in vlan mode or false otherwise
 **/
bool i40e_is_vsi_in_vlan(struct i40e_vsi *vsi)
{
        /* If we have a PVID, always operate in VLAN mode */
        if (vsi->info.pvid)
                return true;

        /* We need to operate in VLAN mode whenever we have any filters with
         * a VLAN other than I40E_VLAN_ALL. We could check the table each
         * time, incurring search cost repeatedly. However, we can notice two
         * things:
         *
         * 1) the only place where we can gain a VLAN filter is in
         *    i40e_add_filter.
         *
         * 2) the only place where filters are actually removed is in
         *    i40e_sync_filters_subtask.
         *
         * Thus, we can simply use a boolean value, has_vlan_filters which we
         * will set to true when we add a VLAN filter in i40e_add_filter. Then
         * we have to perform the full search after deleting filters in
         * i40e_sync_filters_subtask, but we already have to search
         * filters here and can perform the check at the same time. This
         * results in avoiding embedding a loop for VLAN mode inside another
         * loop over all the filters, and should maintain correctness as noted
         * above.
         */
        return vsi->has_vlan_filter;
}

/**
 * i40e_correct_mac_vlan_filters - Correct non-VLAN filters if necessary
 * @vsi: the VSI to configure
 * @tmp_add_list: list of filters ready to be added
 * @tmp_del_list: list of filters ready to be deleted
 * @vlan_filters: the number of active VLAN filters
 *
 * Update VLAN=0 and VLAN=-1 (I40E_VLAN_ANY) filters properly so that they
 * behave as expected. If we have any active VLAN filters remaining or about
 * to be added then we need to update non-VLAN filters to be marked as VLAN=0
 * so that they only match against untagged traffic. If we no longer have any
 * active VLAN filters, we need to make all non-VLAN filters marked as VLAN=-1
 * so that they match against both tagged and untagged traffic. In this way,
 * we ensure that we correctly receive the desired traffic. This ensures that
 * when we have an active VLAN we will receive only untagged traffic and
 * traffic matching active VLANs. If we have no active VLANs then we will
 * operate in non-VLAN mode and receive all traffic, tagged or untagged.
 *
 * Finally, in a similar fashion, this function also corrects filters when
 * there is an active PVID assigned to this VSI.
 *
 * In case of memory allocation failure return -ENOMEM. Otherwise, return 0.
 *
 * This function is only expected to be called from within
 * i40e_sync_vsi_filters.
 *
 * NOTE: This function expects to be called while under the
 * mac_filter_hash_lock
 */
static int i40e_correct_mac_vlan_filters(struct i40e_vsi *vsi,
                                         struct hlist_head *tmp_add_list,
                                         struct hlist_head *tmp_del_list,
                                         int vlan_filters)
{
        s16 pvid = le16_to_cpu(vsi->info.pvid);
        struct i40e_mac_filter *f, *add_head;
        struct i40e_new_mac_filter *new;
        struct hlist_node *h;
        int bkt, new_vlan;

        /* To determine if a particular filter needs to be replaced we
         * have the three following conditions:
         *
         * a) if we have a PVID assigned, then all filters which are
         *    not marked as VLAN=PVID must be replaced with filters that
         *    are.
         * b) otherwise, if we have any active VLANS, all filters
         *    which are marked as VLAN=-1 must be replaced with
         *    filters marked as VLAN=0
         * c) finally, if we do not have any active VLANS, all filters
         *    which are marked as VLAN=0 must be replaced with filters
         *    marked as VLAN=-1
         */

        /* Update the filters about to be added in place */
        hlist_for_each_entry(new, tmp_add_list, hlist) {
                if (pvid && new->f->vlan != pvid)
                        new->f->vlan = pvid;
                else if (vlan_filters && new->f->vlan == I40E_VLAN_ANY)
                        new->f->vlan = 0;
                else if (!vlan_filters && new->f->vlan == 0)
                        new->f->vlan = I40E_VLAN_ANY;
        }

        /* Update the remaining active filters */
        hash_for_each_safe(vsi->mac_filter_hash, bkt, h, f, hlist) {
                /* Combine the checks for whether a filter needs to be changed
                 * and then determine the new VLAN inside the if block, in
                 * order to avoid duplicating code for adding the new filter
                 * then deleting the old filter.
                 */
                if ((pvid && f->vlan != pvid) ||
                    (vlan_filters && f->vlan == I40E_VLAN_ANY) ||
                    (!vlan_filters && f->vlan == 0)) {
                        /* Determine the new vlan we will be adding */
                        if (pvid)
                                new_vlan = pvid;
                        else if (vlan_filters)
                                new_vlan = 0;
                        else
                                new_vlan = I40E_VLAN_ANY;

                        /* Create the new filter */
                        add_head = i40e_add_filter(vsi, f->macaddr, new_vlan);
                        if (!add_head)
                                return -ENOMEM;

                        /* Create a temporary i40e_new_mac_filter */
                        new = kzalloc(sizeof(*new), GFP_ATOMIC);
                        if (!new)
                                return -ENOMEM;

                        new->f = add_head;
                        new->state = add_head->state;
                        if (add_head->state == I40E_FILTER_NEW)
                                add_head->state = I40E_FILTER_NEW_SYNC;

                        /* Add the new filter to the tmp list */
                        hlist_add_head(&new->hlist, tmp_add_list);

                        /* Put the original filter into the delete list */
                        f->state = I40E_FILTER_REMOVE;
                        hash_del(&f->hlist);
                        hlist_add_head(&f->hlist, tmp_del_list);
                }
        }

        vsi->has_vlan_filter = !!vlan_filters;

        return 0;
}

/**
 * i40e_get_vf_new_vlan - Get new vlan id on a vf
 * @vsi: the vsi to configure
 * @new_mac: new mac filter to be added
 * @f: existing mac filter, replaced with new_mac->f if new_mac is not NULL
 * @vlan_filters: the number of active VLAN filters
 * @trusted: flag if the VF is trusted
 *
 * Get new VLAN id based on current VLAN filters, trust, PVID
 * and vf-vlan-prune-disable flag.
 *
 * Returns the value of the new vlan filter or
 * the old value if no new filter is needed.
 */
static s16 i40e_get_vf_new_vlan(struct i40e_vsi *vsi,
                                struct i40e_new_mac_filter *new_mac,
                                struct i40e_mac_filter *f,
                                int vlan_filters,
                                bool trusted)
{
        s16 pvid = le16_to_cpu(vsi->info.pvid);
        struct i40e_pf *pf = vsi->back;
        bool is_any;

        if (new_mac)
                f = new_mac->f;

        if (pvid && f->vlan != pvid)
                return pvid;

        is_any = (trusted ||
                  !test_bit(I40E_FLAG_VF_VLAN_PRUNING_ENA, pf->flags));

        if ((vlan_filters && f->vlan == I40E_VLAN_ANY) ||
            (!is_any && !vlan_filters && f->vlan == I40E_VLAN_ANY) ||
            (is_any && !vlan_filters && f->vlan == 0)) {
                if (is_any)
                        return I40E_VLAN_ANY;
                else
                        return 0;
        }

        return f->vlan;
}

/**
 * i40e_correct_vf_mac_vlan_filters - Correct non-VLAN VF filters if necessary
 * @vsi: the vsi to configure
 * @tmp_add_list: list of filters ready to be added
 * @tmp_del_list: list of filters ready to be deleted
 * @vlan_filters: the number of active VLAN filters
 * @trusted: flag if the VF is trusted
 *
 * Correct VF VLAN filters based on current VLAN filters, trust, PVID
 * and vf-vlan-prune-disable flag.
 *
 * In case of memory allocation failure return -ENOMEM. Otherwise, return 0.
 *
 * This function is only expected to be called from within
 * i40e_sync_vsi_filters.
 *
 * NOTE: This function expects to be called while under the
 * mac_filter_hash_lock
 */
static int i40e_correct_vf_mac_vlan_filters(struct i40e_vsi *vsi,
                                            struct hlist_head *tmp_add_list,
                                            struct hlist_head *tmp_del_list,
                                            int vlan_filters,
                                            bool trusted)
{
        struct i40e_mac_filter *f, *add_head;
        struct i40e_new_mac_filter *new_mac;
        struct hlist_node *h;
        int bkt, new_vlan;

        hlist_for_each_entry(new_mac, tmp_add_list, hlist) {
                new_mac->f->vlan = i40e_get_vf_new_vlan(vsi, new_mac, NULL,
                                                        vlan_filters, trusted);
        }

        hash_for_each_safe(vsi->mac_filter_hash, bkt, h, f, hlist) {
                new_vlan = i40e_get_vf_new_vlan(vsi, NULL, f, vlan_filters,
                                                trusted);
                if (new_vlan != f->vlan) {
                        add_head = i40e_add_filter(vsi, f->macaddr, new_vlan);
                        if (!add_head)
                                return -ENOMEM;
                        /* Create a temporary i40e_new_mac_filter */
                        new_mac = kzalloc(sizeof(*new_mac), GFP_ATOMIC);
                        if (!new_mac)
                                return -ENOMEM;
                        new_mac->f = add_head;
                        new_mac->state = add_head->state;
                        if (add_head->state == I40E_FILTER_NEW)
                                add_head->state = I40E_FILTER_NEW_SYNC;

                        /* Add the new filter to the tmp list */
                        hlist_add_head(&new_mac->hlist, tmp_add_list);

                        /* Put the original filter into the delete list */
                        f->state = I40E_FILTER_REMOVE;
                        hash_del(&f->hlist);
                        hlist_add_head(&f->hlist, tmp_del_list);
                }
        }

        vsi->has_vlan_filter = !!vlan_filters;
        return 0;
}

/**
 * i40e_rm_default_mac_filter - Remove the default MAC filter set by NVM
 * @vsi: the PF Main VSI - inappropriate for any other VSI
 * @macaddr: the MAC address
 *
 * Remove whatever filter the firmware set up so the driver can manage
 * its own filtering intelligently.
 **/
static void i40e_rm_default_mac_filter(struct i40e_vsi *vsi, u8 *macaddr)
{
        struct i40e_aqc_remove_macvlan_element_data element;
        struct i40e_pf *pf = vsi->back;

        /* Only appropriate for the PF main VSI */
        if (vsi->type != I40E_VSI_MAIN)
                return;

        memset(&element, 0, sizeof(element));
        ether_addr_copy(element.mac_addr, macaddr);
        element.vlan_tag = 0;
        /* Ignore error returns, some firmware does it this way... */
        element.flags = I40E_AQC_MACVLAN_DEL_PERFECT_MATCH;
        i40e_aq_remove_macvlan(&pf->hw, vsi->seid, &element, 1, NULL);

        memset(&element, 0, sizeof(element));
        ether_addr_copy(element.mac_addr, macaddr);
        element.vlan_tag = 0;
        /* ...and some firmware does it this way. */
        element.flags = I40E_AQC_MACVLAN_DEL_PERFECT_MATCH |
                        I40E_AQC_MACVLAN_DEL_IGNORE_VLAN;
        i40e_aq_remove_macvlan(&pf->hw, vsi->seid, &element, 1, NULL);
}

/**
 * i40e_add_filter - Add a mac/vlan filter to the VSI
 * @vsi: the VSI to be searched
 * @macaddr: the MAC address
 * @vlan: the vlan
 *
 * Returns ptr to the filter object or NULL when no memory available.
 *
 * NOTE: This function is expected to be called with mac_filter_hash_lock
 * being held.
 **/
struct i40e_mac_filter *i40e_add_filter(struct i40e_vsi *vsi,
                                        const u8 *macaddr, s16 vlan)
{
        struct i40e_mac_filter *f;
        u64 key;

        if (!vsi || !macaddr)
                return NULL;

        f = i40e_find_filter(vsi, macaddr, vlan);
        if (!f) {
                f = kzalloc(sizeof(*f), GFP_ATOMIC);
                if (!f)
                        return NULL;

                /* Update the boolean indicating if we need to function in
                 * VLAN mode.
                 */
                if (vlan >= 0)
                        vsi->has_vlan_filter = true;

                ether_addr_copy(f->macaddr, macaddr);
                f->vlan = vlan;
                f->state = I40E_FILTER_NEW;
                INIT_HLIST_NODE(&f->hlist);

                key = i40e_addr_to_hkey(macaddr);
                hash_add(vsi->mac_filter_hash, &f->hlist, key);

                vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
                set_bit(__I40E_MACVLAN_SYNC_PENDING, vsi->back->state);
        }

        /* If we're asked to add a filter that has been marked for removal, it
         * is safe to simply restore it to active state. __i40e_del_filter
         * will have simply deleted any filters which were previously marked
         * NEW or FAILED, so if it is currently marked REMOVE it must have
         * previously been ACTIVE. Since we haven't yet run the sync filters
         * task, just restore this filter to the ACTIVE state so that the
         * sync task leaves it in place
         */
        if (f->state == I40E_FILTER_REMOVE)
                f->state = I40E_FILTER_ACTIVE;

        return f;
}

/**
 * __i40e_del_filter - Remove a specific filter from the VSI
 * @vsi: VSI to remove from
 * @f: the filter to remove from the list
 *
 * This function should be called instead of i40e_del_filter only if you know
 * the exact filter you will remove already, such as via i40e_find_filter or
 * i40e_find_mac.
 *
 * NOTE: This function is expected to be called with mac_filter_hash_lock
 * being held.
 * ANOTHER NOTE: This function MUST be called from within the context of
 * the "safe" variants of any list iterators, e.g. list_for_each_entry_safe()
 * instead of list_for_each_entry().
 **/
void __i40e_del_filter(struct i40e_vsi *vsi, struct i40e_mac_filter *f)
{
        if (!f)
                return;

        /* If the filter was never added to firmware then we can just delete it
         * directly and we don't want to set the status to remove or else an
         * admin queue command will unnecessarily fire.
         */
        if ((f->state == I40E_FILTER_FAILED) ||
            (f->state == I40E_FILTER_NEW)) {
                hash_del(&f->hlist);
                kfree(f);
        } else {
                f->state = I40E_FILTER_REMOVE;
        }

        vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
        set_bit(__I40E_MACVLAN_SYNC_PENDING, vsi->back->state);
}

/**
 * i40e_del_filter - Remove a MAC/VLAN filter from the VSI
 * @vsi: the VSI to be searched
 * @macaddr: the MAC address
 * @vlan: the VLAN
 *
 * NOTE: This function is expected to be called with mac_filter_hash_lock
 * being held.
 * ANOTHER NOTE: This function MUST be called from within the context of
 * the "safe" variants of any list iterators, e.g. list_for_each_entry_safe()
 * instead of list_for_each_entry().
 **/
void i40e_del_filter(struct i40e_vsi *vsi, const u8 *macaddr, s16 vlan)
{
        struct i40e_mac_filter *f;

        if (!vsi || !macaddr)
                return;

        f = i40e_find_filter(vsi, macaddr, vlan);
        __i40e_del_filter(vsi, f);
}

/**
 * i40e_add_mac_filter - Add a MAC filter for all active VLANs
 * @vsi: the VSI to be searched
 * @macaddr: the mac address to be filtered
 *
 * If we're not in VLAN mode, just add the filter to I40E_VLAN_ANY. Otherwise,
 * go through all the macvlan filters and add a macvlan filter for each
 * unique vlan that already exists. If a PVID has been assigned, instead only
 * add the macaddr to that VLAN.
 *
 * Returns last filter added on success, else NULL
 **/
struct i40e_mac_filter *i40e_add_mac_filter(struct i40e_vsi *vsi,
                                            const u8 *macaddr)
{
        struct i40e_mac_filter *f, *add = NULL;
        struct hlist_node *h;
        int bkt;

        lockdep_assert_held(&vsi->mac_filter_hash_lock);
        if (vsi->info.pvid)
                return i40e_add_filter(vsi, macaddr,
                                       le16_to_cpu(vsi->info.pvid));

        if (!i40e_is_vsi_in_vlan(vsi))
                return i40e_add_filter(vsi, macaddr, I40E_VLAN_ANY);

        hash_for_each_safe(vsi->mac_filter_hash, bkt, h, f, hlist) {
                if (f->state == I40E_FILTER_REMOVE)
                        continue;
                add = i40e_add_filter(vsi, macaddr, f->vlan);
                if (!add)
                        return NULL;
        }

        return add;
}

/**
 * i40e_del_mac_filter - Remove a MAC filter from all VLANs
 * @vsi: the VSI to be searched
 * @macaddr: the mac address to be removed
 *
 * Removes a given MAC address from a VSI regardless of what VLAN it has been
 * associated with.
 *
 * Returns 0 for success, or error
 **/
int i40e_del_mac_filter(struct i40e_vsi *vsi, const u8 *macaddr)
{
        struct i40e_mac_filter *f;
        struct hlist_node *h;
        bool found = false;
        int bkt;

        lockdep_assert_held(&vsi->mac_filter_hash_lock);
        hash_for_each_safe(vsi->mac_filter_hash, bkt, h, f, hlist) {
                if (ether_addr_equal(macaddr, f->macaddr)) {
                        __i40e_del_filter(vsi, f);
                        found = true;
                }
        }

        if (found)
                return 0;
        else
                return -ENOENT;
}

/**
 * i40e_set_mac - NDO callback to set mac address
 * @netdev: network interface device structure
 * @p: pointer to an address structure
 *
 * Returns 0 on success, negative on failure
 **/
static int i40e_set_mac(struct net_device *netdev, void *p)
{
        struct i40e_netdev_priv *np = netdev_priv(netdev);
        struct i40e_vsi *vsi = np->vsi;
        struct i40e_pf *pf = vsi->back;
        struct i40e_hw *hw = &pf->hw;
        struct sockaddr *addr = p;

        if (!is_valid_ether_addr(addr->sa_data))
                return -EADDRNOTAVAIL;

        if (test_bit(__I40E_DOWN, pf->state) ||
            test_bit(__I40E_RESET_RECOVERY_PENDING, pf->state))
                return -EADDRNOTAVAIL;

        if (ether_addr_equal(hw->mac.addr, addr->sa_data))
                netdev_info(netdev, "returning to hw mac address %pM\n",
                            hw->mac.addr);
        else
                netdev_info(netdev, "set new mac address %pM\n", addr->sa_data);

        /* Copy the address first, so that we avoid a possible race with
         * .set_rx_mode().
         * - Remove old address from MAC filter
         * - Copy new address
         * - Add new address to MAC filter
         */
        spin_lock_bh(&vsi->mac_filter_hash_lock);
        i40e_del_mac_filter(vsi, netdev->dev_addr);
        eth_hw_addr_set(netdev, addr->sa_data);
        i40e_add_mac_filter(vsi, netdev->dev_addr);
        spin_unlock_bh(&vsi->mac_filter_hash_lock);

        if (vsi->type == I40E_VSI_MAIN) {
                int ret;

                ret = i40e_aq_mac_address_write(hw, I40E_AQC_WRITE_TYPE_LAA_WOL,
                                                addr->sa_data, NULL);
                if (ret)
                        netdev_info(netdev, "Ignoring error from firmware on LAA update, status %pe, AQ ret %s\n",
                                    ERR_PTR(ret),
                                    i40e_aq_str(hw, hw->aq.asq_last_status));
        }

        /* schedule our worker thread which will take care of
         * applying the new filter changes
         */
        i40e_service_event_schedule(pf);
        return 0;
}

/**
 * i40e_config_rss_aq - Prepare for RSS using AQ commands
 * @vsi: vsi structure
 * @seed: RSS hash seed
 * @lut: pointer to lookup table of lut_size
 * @lut_size: size of the lookup table
 **/
static int i40e_config_rss_aq(struct i40e_vsi *vsi, const u8 *seed,
                              u8 *lut, u16 lut_size)
{
        struct i40e_pf *pf = vsi->back;
        struct i40e_hw *hw = &pf->hw;
        int ret = 0;

        if (seed) {
                struct i40e_aqc_get_set_rss_key_data *seed_dw =
                        (struct i40e_aqc_get_set_rss_key_data *)seed;
                ret = i40e_aq_set_rss_key(hw, vsi->id, seed_dw);
                if (ret) {
                        dev_info(&pf->pdev->dev,
                                 "Cannot set RSS key, err %pe aq_err %s\n",
                                 ERR_PTR(ret),
                                 i40e_aq_str(hw, hw->aq.asq_last_status));
                        return ret;
                }
        }
        if (lut) {
                bool pf_lut = vsi->type == I40E_VSI_MAIN;

                ret = i40e_aq_set_rss_lut(hw, vsi->id, pf_lut, lut, lut_size);
                if (ret) {
                        dev_info(&pf->pdev->dev,
                                 "Cannot set RSS lut, err %pe aq_err %s\n",
                                 ERR_PTR(ret),
                                 i40e_aq_str(hw, hw->aq.asq_last_status));
                        return ret;
                }
        }
        return ret;
}

/**
 * i40e_vsi_config_rss - Prepare for VSI(VMDq) RSS if used
 * @vsi: VSI structure
 **/
static int i40e_vsi_config_rss(struct i40e_vsi *vsi)
{
        struct i40e_pf *pf = vsi->back;
        u8 seed[I40E_HKEY_ARRAY_SIZE];
        u8 *lut;
        int ret;

        if (!test_bit(I40E_HW_CAP_RSS_AQ, pf->hw.caps))
                return 0;
        if (!vsi->rss_size)
                vsi->rss_size = min_t(int, pf->alloc_rss_size,
                                      vsi->num_queue_pairs);
        if (!vsi->rss_size)
                return -EINVAL;
        lut = kzalloc(vsi->rss_table_size, GFP_KERNEL);
        if (!lut)
                return -ENOMEM;

        /* Use the user configured hash keys and lookup table if there is one,
         * otherwise use default
         */
        if (vsi->rss_lut_user)
                memcpy(lut, vsi->rss_lut_user, vsi->rss_table_size);
        else
                i40e_fill_rss_lut(pf, lut, vsi->rss_table_size, vsi->rss_size);
        if (vsi->rss_hkey_user)
                memcpy(seed, vsi->rss_hkey_user, I40E_HKEY_ARRAY_SIZE);
        else
                netdev_rss_key_fill((void *)seed, I40E_HKEY_ARRAY_SIZE);
        ret = i40e_config_rss_aq(vsi, seed, lut, vsi->rss_table_size);
        kfree(lut);
        return ret;
}

/**
 * i40e_vsi_setup_queue_map_mqprio - Prepares mqprio based tc_config
 * @vsi: the VSI being configured,
 * @ctxt: VSI context structure
 * @enabled_tc: number of traffic classes to enable
 *
 * Prepares VSI tc_config to have queue configurations based on MQPRIO options.
 **/
static int i40e_vsi_setup_queue_map_mqprio(struct i40e_vsi *vsi,
                                           struct i40e_vsi_context *ctxt,
                                           u8 enabled_tc)
{
        u16 qcount = 0, max_qcount, qmap, sections = 0;
        int i, override_q, pow, num_qps, ret;
        u8 netdev_tc = 0, offset = 0;

        if (vsi->type != I40E_VSI_MAIN)
                return -EINVAL;
        sections = I40E_AQ_VSI_PROP_QUEUE_MAP_VALID;
        sections |= I40E_AQ_VSI_PROP_SCHED_VALID;
        vsi->tc_config.numtc = vsi->mqprio_qopt.qopt.num_tc;
        vsi->tc_config.enabled_tc = enabled_tc ? enabled_tc : 1;
        num_qps = vsi->mqprio_qopt.qopt.count[0];

        /* find the next higher power-of-2 of num queue pairs */
        pow = ilog2(num_qps);
        if (!is_power_of_2(num_qps))
                pow++;
        qmap = (offset << I40E_AQ_VSI_TC_QUE_OFFSET_SHIFT) |
                (pow << I40E_AQ_VSI_TC_QUE_NUMBER_SHIFT);

        /* Setup queue offset/count for all TCs for given VSI */
        max_qcount = vsi->mqprio_qopt.qopt.count[0];
        for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
                /* See if the given TC is enabled for the given VSI */
                if (vsi->tc_config.enabled_tc & BIT(i)) {
                        offset = vsi->mqprio_qopt.qopt.offset[i];
                        qcount = vsi->mqprio_qopt.qopt.count[i];
                        if (qcount > max_qcount)
                                max_qcount = qcount;
                        vsi->tc_config.tc_info[i].qoffset = offset;
                        vsi->tc_config.tc_info[i].qcount = qcount;
                        vsi->tc_config.tc_info[i].netdev_tc = netdev_tc++;
                } else {
                        /* TC is not enabled so set the offset to
                         * default queue and allocate one queue
                         * for the given TC.
                         */
                        vsi->tc_config.tc_info[i].qoffset = 0;
                        vsi->tc_config.tc_info[i].qcount = 1;
                        vsi->tc_config.tc_info[i].netdev_tc = 0;
                }
        }

        /* Set actual Tx/Rx queue pairs */
        vsi->num_queue_pairs = offset + qcount;

        /* Setup queue TC[0].qmap for given VSI context */
        ctxt->info.tc_mapping[0] = cpu_to_le16(qmap);
        ctxt->info.mapping_flags |= cpu_to_le16(I40E_AQ_VSI_QUE_MAP_CONTIG);
        ctxt->info.queue_mapping[0] = cpu_to_le16(vsi->base_queue);
        ctxt->info.valid_sections |= cpu_to_le16(sections);

        /* Reconfigure RSS for main VSI with max queue count */
        vsi->rss_size = max_qcount;
        ret = i40e_vsi_config_rss(vsi);
        if (ret) {
                dev_info(&vsi->back->pdev->dev,
                         "Failed to reconfig rss for num_queues (%u)\n",
                         max_qcount);
                return ret;
        }
        vsi->reconfig_rss = true;
        dev_dbg(&vsi->back->pdev->dev,
                "Reconfigured rss with num_queues (%u)\n", max_qcount);

        /* Find queue count available for channel VSIs and starting offset
         * for channel VSIs
         */
        override_q = vsi->mqprio_qopt.qopt.count[0];
        if (override_q && override_q < vsi->num_queue_pairs) {
                vsi->cnt_q_avail = vsi->num_queue_pairs - override_q;
                vsi->next_base_queue = override_q;
        }
        return 0;
}

/**
 * i40e_vsi_setup_queue_map - Setup a VSI queue map based on enabled_tc
 * @vsi: the VSI being setup
 * @ctxt: VSI context structure
 * @enabled_tc: Enabled TCs bitmap
 * @is_add: True if called before Add VSI
 *
 * Setup VSI queue mapping for enabled traffic classes.
 **/
static void i40e_vsi_setup_queue_map(struct i40e_vsi *vsi,
                                     struct i40e_vsi_context *ctxt,
                                     u8 enabled_tc,
                                     bool is_add)
{
        struct i40e_pf *pf = vsi->back;
        u16 num_tc_qps = 0;
        u16 sections = 0;
        u8 netdev_tc = 0;
        u16 numtc = 1;
        u16 qcount;
        u8 offset;
        u16 qmap;
        int i;

        sections = I40E_AQ_VSI_PROP_QUEUE_MAP_VALID;
        offset = 0;
        /* zero out queue mapping, it will get updated on the end of the function */
        memset(ctxt->info.queue_mapping, 0, sizeof(ctxt->info.queue_mapping));

        if (vsi->type == I40E_VSI_MAIN) {
                /* This code helps add more queue to the VSI if we have
                 * more cores than RSS can support, the higher cores will
                 * be served by ATR or other filters. Furthermore, the
                 * non-zero req_queue_pairs says that user requested a new
                 * queue count via ethtool's set_channels, so use this
                 * value for queues distribution across traffic classes
                 * We need at least one queue pair for the interface
                 * to be usable as we see in else statement.
                 */
                if (vsi->req_queue_pairs > 0)
                        vsi->num_queue_pairs = vsi->req_queue_pairs;
                else if (test_bit(I40E_FLAG_MSIX_ENA, pf->flags))
                        vsi->num_queue_pairs = pf->num_lan_msix;
                else
                        vsi->num_queue_pairs = 1;
        }

        /* Number of queues per enabled TC */
        if (vsi->type == I40E_VSI_MAIN ||
            (vsi->type == I40E_VSI_SRIOV && vsi->num_queue_pairs != 0))
                num_tc_qps = vsi->num_queue_pairs;
        else
                num_tc_qps = vsi->alloc_queue_pairs;

        if (enabled_tc && test_bit(I40E_FLAG_DCB_ENA, vsi->back->flags)) {
                /* Find numtc from enabled TC bitmap */
                for (i = 0, numtc = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
                        if (enabled_tc & BIT(i)) /* TC is enabled */
                                numtc++;
                }
                if (!numtc) {
                        dev_warn(&pf->pdev->dev, "DCB is enabled but no TC enabled, forcing TC0\n");
                        numtc = 1;
                }
                num_tc_qps = num_tc_qps / numtc;
                num_tc_qps = min_t(int, num_tc_qps,
                                   i40e_pf_get_max_q_per_tc(pf));
        }

        vsi->tc_config.numtc = numtc;
        vsi->tc_config.enabled_tc = enabled_tc ? enabled_tc : 1;

        /* Do not allow use more TC queue pairs than MSI-X vectors exist */
        if (test_bit(I40E_FLAG_MSIX_ENA, pf->flags))
                num_tc_qps = min_t(int, num_tc_qps, pf->num_lan_msix);

        /* Setup queue offset/count for all TCs for given VSI */
        for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
                /* See if the given TC is enabled for the given VSI */
                if (vsi->tc_config.enabled_tc & BIT(i)) {
                        /* TC is enabled */
                        int pow, num_qps;

                        switch (vsi->type) {
                        case I40E_VSI_MAIN:
                                if ((!test_bit(I40E_FLAG_FD_SB_ENA,
                                               pf->flags) &&
                                     !test_bit(I40E_FLAG_FD_ATR_ENA,
                                               pf->flags)) ||
                                    vsi->tc_config.enabled_tc != 1) {
                                        qcount = min_t(int, pf->alloc_rss_size,
                                                       num_tc_qps);
                                        break;
                                }
                                fallthrough;
                        case I40E_VSI_FDIR:
                        case I40E_VSI_SRIOV:
                        case I40E_VSI_VMDQ2:
                        default:
                                qcount = num_tc_qps;
                                WARN_ON(i != 0);
                                break;
                        }
                        vsi->tc_config.tc_info[i].qoffset = offset;
                        vsi->tc_config.tc_info[i].qcount = qcount;

                        /* find the next higher power-of-2 of num queue pairs */
                        num_qps = qcount;
                        pow = 0;
                        while (num_qps && (BIT_ULL(pow) < qcount)) {
                                pow++;
                                num_qps >>= 1;
                        }

                        vsi->tc_config.tc_info[i].netdev_tc = netdev_tc++;
                        qmap =
                            (offset << I40E_AQ_VSI_TC_QUE_OFFSET_SHIFT) |
                            (pow << I40E_AQ_VSI_TC_QUE_NUMBER_SHIFT);

                        offset += qcount;
                } else {
                        /* TC is not enabled so set the offset to
                         * default queue and allocate one queue
                         * for the given TC.
                         */
                        vsi->tc_config.tc_info[i].qoffset = 0;
                        vsi->tc_config.tc_info[i].qcount = 1;
                        vsi->tc_config.tc_info[i].netdev_tc = 0;

                        qmap = 0;
                }
                ctxt->info.tc_mapping[i] = cpu_to_le16(qmap);
        }
        /* Do not change previously set num_queue_pairs for PFs and VFs*/
        if ((vsi->type == I40E_VSI_MAIN && numtc != 1) ||
            (vsi->type == I40E_VSI_SRIOV && vsi->num_queue_pairs == 0) ||
            (vsi->type != I40E_VSI_MAIN && vsi->type != I40E_VSI_SRIOV))
                vsi->num_queue_pairs = offset;

        /* Scheduler section valid can only be set for ADD VSI */
        if (is_add) {
                sections |= I40E_AQ_VSI_PROP_SCHED_VALID;

                ctxt->info.up_enable_bits = enabled_tc;
        }
        if (vsi->type == I40E_VSI_SRIOV) {
                ctxt->info.mapping_flags |=
                                     cpu_to_le16(I40E_AQ_VSI_QUE_MAP_NONCONTIG);
                for (i = 0; i < vsi->num_queue_pairs; i++)
                        ctxt->info.queue_mapping[i] =
                                               cpu_to_le16(vsi->base_queue + i);
        } else {
                ctxt->info.mapping_flags |=
                                        cpu_to_le16(I40E_AQ_VSI_QUE_MAP_CONTIG);
                ctxt->info.queue_mapping[0] = cpu_to_le16(vsi->base_queue);
        }
        ctxt->info.valid_sections |= cpu_to_le16(sections);
}

/**
 * i40e_addr_sync - Callback for dev_(mc|uc)_sync to add address
 * @netdev: the netdevice
 * @addr: address to add
 *
 * Called by __dev_(mc|uc)_sync when an address needs to be added. We call
 * __dev_(uc|mc)_sync from .set_rx_mode and guarantee to hold the hash lock.
 */
static int i40e_addr_sync(struct net_device *netdev, const u8 *addr)
{
        struct i40e_netdev_priv *np = netdev_priv(netdev);
        struct i40e_vsi *vsi = np->vsi;

        if (i40e_add_mac_filter(vsi, addr))
                return 0;
        else
                return -ENOMEM;
}

/**
 * i40e_addr_unsync - Callback for dev_(mc|uc)_sync to remove address
 * @netdev: the netdevice
 * @addr: address to add
 *
 * Called by __dev_(mc|uc)_sync when an address needs to be removed. We call
 * __dev_(uc|mc)_sync from .set_rx_mode and guarantee to hold the hash lock.
 */
static int i40e_addr_unsync(struct net_device *netdev, const u8 *addr)
{
        struct i40e_netdev_priv *np = netdev_priv(netdev);
        struct i40e_vsi *vsi = np->vsi;

        /* Under some circumstances, we might receive a request to delete
         * our own device address from our uc list. Because we store the
         * device address in the VSI's MAC/VLAN filter list, we need to ignore
         * such requests and not delete our device address from this list.
         */
        if (ether_addr_equal(addr, netdev->dev_addr))
                return 0;

        i40e_del_mac_filter(vsi, addr);

        return 0;
}

/**
 * i40e_set_rx_mode - NDO callback to set the netdev filters
 * @netdev: network interface device structure
 **/
static void i40e_set_rx_mode(struct net_device *netdev)
{
        struct i40e_netdev_priv *np = netdev_priv(netdev);
        struct i40e_vsi *vsi = np->vsi;

        spin_lock_bh(&vsi->mac_filter_hash_lock);

        __dev_uc_sync(netdev, i40e_addr_sync, i40e_addr_unsync);
        __dev_mc_sync(netdev, i40e_addr_sync, i40e_addr_unsync);

        spin_unlock_bh(&vsi->mac_filter_hash_lock);

        /* check for other flag changes */
        if (vsi->current_netdev_flags != vsi->netdev->flags) {
                vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
                set_bit(__I40E_MACVLAN_SYNC_PENDING, vsi->back->state);
        }
}

/**
 * i40e_undo_del_filter_entries - Undo the changes made to MAC filter entries
 * @vsi: Pointer to VSI struct
 * @from: Pointer to list which contains MAC filter entries - changes to
 *        those entries needs to be undone.
 *
 * MAC filter entries from this list were slated for deletion.
 **/
static void i40e_undo_del_filter_entries(struct i40e_vsi *vsi,
                                         struct hlist_head *from)
{
        struct i40e_mac_filter *f;
        struct hlist_node *h;

        hlist_for_each_entry_safe(f, h, from, hlist) {
                u64 key = i40e_addr_to_hkey(f->macaddr);

                /* Move the element back into MAC filter list*/
                hlist_del(&f->hlist);
                hash_add(vsi->mac_filter_hash, &f->hlist, key);
        }
}

/**
 * i40e_undo_add_filter_entries - Undo the changes made to MAC filter entries
 * @vsi: Pointer to vsi struct
 * @from: Pointer to list which contains MAC filter entries - changes to
 *        those entries needs to be undone.
 *
 * MAC filter entries from this list were slated for addition.
 **/
static void i40e_undo_add_filter_entries(struct i40e_vsi *vsi,
                                         struct hlist_head *from)
{
        struct i40e_new_mac_filter *new;
        struct hlist_node *h;

        hlist_for_each_entry_safe(new, h, from, hlist) {
                /* We can simply free the wrapper structure */
                hlist_del(&new->hlist);
                netdev_hw_addr_refcnt(new->f, vsi->netdev, -1);
                kfree(new);
        }
}

/**
 * i40e_next_filter - Get the next non-broadcast filter from a list
 * @next: pointer to filter in list
 *
 * Returns the next non-broadcast filter in the list. Required so that we
 * ignore broadcast filters within the list, since these are not handled via
 * the normal firmware update path.
 */
static
struct i40e_new_mac_filter *i40e_next_filter(struct i40e_new_mac_filter *next)
{
        hlist_for_each_entry_continue(next, hlist) {
                if (!is_broadcast_ether_addr(next->f->macaddr))
                        return next;
        }

        return NULL;
}

/**
 * i40e_update_filter_state - Update filter state based on return data
 * from firmware
 * @count: Number of filters added
 * @add_list: return data from fw
 * @add_head: pointer to first filter in current batch
 *
 * MAC filter entries from list were slated to be added to device. Returns
 * number of successful filters. Note that 0 does NOT mean success!
 **/
static int
i40e_update_filter_state(int count,
                         struct i40e_aqc_add_macvlan_element_data *add_list,
                         struct i40e_new_mac_filter *add_head)
{
        int retval = 0;
        int i;

        for (i = 0; i < count; i++) {
                /* Always check status of each filter. We don't need to check
                 * the firmware return status because we pre-set the filter
                 * status to I40E_AQC_MM_ERR_NO_RES when sending the filter
                 * request to the adminq. Thus, if it no longer matches then
                 * we know the filter is active.
                 */
                if (add_list[i].match_method == I40E_AQC_MM_ERR_NO_RES) {
                        add_head->state = I40E_FILTER_FAILED;
                } else {
                        add_head->state = I40E_FILTER_ACTIVE;
                        retval++;
                }

                add_head = i40e_next_filter(add_head);
                if (!add_head)
                        break;
        }

        return retval;
}

/**
 * i40e_aqc_del_filters - Request firmware to delete a set of filters
 * @vsi: ptr to the VSI
 * @vsi_name: name to display in messages
 * @list: the list of filters to send to firmware
 * @num_del: the number of filters to delete
 * @retval: Set to -EIO on failure to delete
 *
 * Send a request to firmware via AdminQ to delete a set of filters. Uses
 * *retval instead of a return value so that success does not force ret_val to
 * be set to 0. This ensures that a sequence of calls to this function
 * preserve the previous value of *retval on successful delete.
 */
static
void i40e_aqc_del_filters(struct i40e_vsi *vsi, const char *vsi_name,
                          struct i40e_aqc_remove_macvlan_element_data *list,
                          int num_del, int *retval)
{
        struct i40e_hw *hw = &vsi->back->hw;
        enum i40e_admin_queue_err aq_status;
        int aq_ret;

        aq_ret = i40e_aq_remove_macvlan_v2(hw, vsi->seid, list, num_del, NULL,
                                           &aq_status);

        /* Explicitly ignore and do not report when firmware returns ENOENT */
        if (aq_ret && !(aq_status == I40E_AQ_RC_ENOENT)) {
                *retval = -EIO;
                dev_info(&vsi->back->pdev->dev,
                         "ignoring delete macvlan error on %s, err %pe, aq_err %s\n",
                         vsi_name, ERR_PTR(aq_ret),
                         i40e_aq_str(hw, aq_status));
        }
}

/**
 * i40e_aqc_add_filters - Request firmware to add a set of filters
 * @vsi: ptr to the VSI
 * @vsi_name: name to display in messages
 * @list: the list of filters to send to firmware
 * @add_head: Position in the add hlist
 * @num_add: the number of filters to add
 *
 * Send a request to firmware via AdminQ to add a chunk of filters. Will set
 * __I40E_VSI_OVERFLOW_PROMISC bit in vsi->state if the firmware has run out of
 * space for more filters.
 */
static
void i40e_aqc_add_filters(struct i40e_vsi *vsi, const char *vsi_name,
                          struct i40e_aqc_add_macvlan_element_data *list,
                          struct i40e_new_mac_filter *add_head,
                          int num_add)
{
        struct i40e_hw *hw = &vsi->back->hw;
        enum i40e_admin_queue_err aq_status;
        int fcnt;

        i40e_aq_add_macvlan_v2(hw, vsi->seid, list, num_add, NULL, &aq_status);
        fcnt = i40e_update_filter_state(num_add, list, add_head);

        if (fcnt != num_add) {
                if (vsi->type == I40E_VSI_MAIN) {
                        set_bit(__I40E_VSI_OVERFLOW_PROMISC, vsi->state);
                        dev_warn(&vsi->back->pdev->dev,
                                 "Error %s adding RX filters on %s, promiscuous mode forced on\n",
                                 i40e_aq_str(hw, aq_status), vsi_name);
                } else if (vsi->type == I40E_VSI_SRIOV ||
                           vsi->type == I40E_VSI_VMDQ1 ||
                           vsi->type == I40E_VSI_VMDQ2) {
                        dev_warn(&vsi->back->pdev->dev,
                                 "Error %s adding RX filters on %s, please set promiscuous on manually for %s\n",
                                 i40e_aq_str(hw, aq_status), vsi_name,
                                             vsi_name);
                } else {
                        dev_warn(&vsi->back->pdev->dev,
                                 "Error %s adding RX filters on %s, incorrect VSI type: %i.\n",
                                 i40e_aq_str(hw, aq_status), vsi_name,
                                             vsi->type);
                }
        }
}

/**
 * i40e_aqc_broadcast_filter - Set promiscuous broadcast flags
 * @vsi: pointer to the VSI
 * @vsi_name: the VSI name
 * @f: filter data
 *
 * This function sets or clears the promiscuous broadcast flags for VLAN
 * filters in order to properly receive broadcast frames. Assumes that only
 * broadcast filters are passed.
 *
 * Returns status indicating success or failure;
 **/
static int
i40e_aqc_broadcast_filter(struct i40e_vsi *vsi, const char *vsi_name,
                          struct i40e_mac_filter *f)
{
        bool enable = f->state == I40E_FILTER_NEW ||
                      f->state == I40E_FILTER_NEW_SYNC;
        struct i40e_hw *hw = &vsi->back->hw;
        int aq_ret;

        if (f->vlan == I40E_VLAN_ANY) {
                aq_ret = i40e_aq_set_vsi_broadcast(hw,
                                                   vsi->seid,
                                                   enable,
                                                   NULL);
        } else {
                aq_ret = i40e_aq_set_vsi_bc_promisc_on_vlan(hw,
                                                            vsi->seid,
                                                            enable,
                                                            f->vlan,
                                                            NULL);
        }

        if (aq_ret) {
                set_bit(__I40E_VSI_OVERFLOW_PROMISC, vsi->state);
                dev_warn(&vsi->back->pdev->dev,
                         "Error %s, forcing overflow promiscuous on %s\n",
                         i40e_aq_str(hw, hw->aq.asq_last_status),
                         vsi_name);
        }

        return aq_ret;
}

/**
 * i40e_set_promiscuous - set promiscuous mode
 * @pf: board private structure
 * @promisc: promisc on or off
 *
 * There are different ways of setting promiscuous mode on a PF depending on
 * what state/environment we're in.  This identifies and sets it appropriately.
 * Returns 0 on success.
 **/
static int i40e_set_promiscuous(struct i40e_pf *pf, bool promisc)
{
        struct i40e_vsi *vsi = i40e_pf_get_main_vsi(pf);
        struct i40e_hw *hw = &pf->hw;
        int aq_ret;

        if (vsi->type == I40E_VSI_MAIN &&
            i40e_pf_get_main_veb(pf) &&
            !test_bit(I40E_FLAG_MFP_ENA, pf->flags)) {
                /* set defport ON for Main VSI instead of true promisc
                 * this way we will get all unicast/multicast and VLAN
                 * promisc behavior but will not get VF or VMDq traffic
                 * replicated on the Main VSI.
                 */
                if (promisc)
                        aq_ret = i40e_aq_set_default_vsi(hw,
                                                         vsi->seid,
                                                         NULL);
                else
                        aq_ret = i40e_aq_clear_default_vsi(hw,
                                                           vsi->seid,
                                                           NULL);
                if (aq_ret) {
                        dev_info(&pf->pdev->dev,
                                 "Set default VSI failed, err %pe, aq_err %s\n",
                                 ERR_PTR(aq_ret),
                                 i40e_aq_str(hw, hw->aq.asq_last_status));
                }
        } else {
                aq_ret = i40e_aq_set_vsi_unicast_promiscuous(
                                                  hw,
                                                  vsi->seid,
                                                  promisc, NULL,
                                                  true);
                if (aq_ret) {
                        dev_info(&pf->pdev->dev,
                                 "set unicast promisc failed, err %pe, aq_err %s\n",
                                 ERR_PTR(aq_ret),
                                 i40e_aq_str(hw, hw->aq.asq_last_status));
                }
                aq_ret = i40e_aq_set_vsi_multicast_promiscuous(
                                                  hw,
                                                  vsi->seid,
                                                  promisc, NULL);
                if (aq_ret) {
                        dev_info(&pf->pdev->dev,
                                 "set multicast promisc failed, err %pe, aq_err %s\n",
                                 ERR_PTR(aq_ret),
                                 i40e_aq_str(hw, hw->aq.asq_last_status));
                }
        }

        if (!aq_ret)
                pf->cur_promisc = promisc;

        return aq_ret;
}

/**
 * i40e_sync_vsi_filters - Update the VSI filter list to the HW
 * @vsi: ptr to the VSI
 *
 * Push any outstanding VSI filter changes through the AdminQ.
 *
 * Returns 0 or error value
 **/
int i40e_sync_vsi_filters(struct i40e_vsi *vsi)
{
        struct hlist_head tmp_add_list, tmp_del_list;
        struct i40e_mac_filter *f;
        struct i40e_new_mac_filter *new, *add_head = NULL;
        struct i40e_hw *hw = &vsi->back->hw;
        bool old_overflow, new_overflow;
        unsigned int failed_filters = 0;
        unsigned int vlan_filters = 0;
        char vsi_name[16] = "PF";
        int filter_list_len = 0;
        u32 changed_flags = 0;
        struct hlist_node *h;
        struct i40e_pf *pf;
        int num_add = 0;
        int num_del = 0;
        int aq_ret = 0;
        int retval = 0;
        u16 cmd_flags;
        int list_size;
        int bkt;

        /* empty array typed pointers, kcalloc later */
        struct i40e_aqc_add_macvlan_element_data *add_list;
        struct i40e_aqc_remove_macvlan_element_data *del_list;

        while (test_and_set_bit(__I40E_VSI_SYNCING_FILTERS, vsi->state))
                usleep_range(1000, 2000);
        pf = vsi->back;

        old_overflow = test_bit(__I40E_VSI_OVERFLOW_PROMISC, vsi->state);

        if (vsi->netdev) {
                changed_flags = vsi->current_netdev_flags ^ vsi->netdev->flags;
                vsi->current_netdev_flags = vsi->netdev->flags;
        }

        INIT_HLIST_HEAD(&tmp_add_list);
        INIT_HLIST_HEAD(&tmp_del_list);

        if (vsi->type == I40E_VSI_SRIOV)
                snprintf(vsi_name, sizeof(vsi_name) - 1, "VF %d", vsi->vf_id);
        else if (vsi->type != I40E_VSI_MAIN)
                snprintf(vsi_name, sizeof(vsi_name) - 1, "vsi %d", vsi->seid);

        if (vsi->flags & I40E_VSI_FLAG_FILTER_CHANGED) {
                vsi->flags &= ~I40E_VSI_FLAG_FILTER_CHANGED;

                spin_lock_bh(&vsi->mac_filter_hash_lock);
                /* Create a list of filters to delete. */
                hash_for_each_safe(vsi->mac_filter_hash, bkt, h, f, hlist) {
                        if (f->state == I40E_FILTER_REMOVE) {
                                /* Move the element into temporary del_list */
                                hash_del(&f->hlist);
                                hlist_add_head(&f->hlist, &tmp_del_list);

                                /* Avoid counting removed filters */
                                continue;
                        }
                        if (f->state == I40E_FILTER_NEW) {
                                /* Create a temporary i40e_new_mac_filter */
                                new = kzalloc(sizeof(*new), GFP_ATOMIC);
                                if (!new)
                                        goto err_no_memory_locked;

                                /* Store pointer to the real filter */
                                new->f = f;
                                new->state = f->state;

                                /* Add it to the hash list */
                                hlist_add_head(&new->hlist, &tmp_add_list);
                                f->state = I40E_FILTER_NEW_SYNC;
                        }

                        /* Count the number of active (current and new) VLAN
                         * filters we have now. Does not count filters which
                         * are marked for deletion.
                         */
                        if (f->vlan > 0)
                                vlan_filters++;
                }

                if (vsi->type != I40E_VSI_SRIOV)
                        retval = i40e_correct_mac_vlan_filters
                                (vsi, &tmp_add_list, &tmp_del_list,
                                 vlan_filters);
                else if (pf->vf)
                        retval = i40e_correct_vf_mac_vlan_filters
                                (vsi, &tmp_add_list, &tmp_del_list,
                                 vlan_filters, pf->vf[vsi->vf_id].trusted);

                hlist_for_each_entry(new, &tmp_add_list, hlist)
                        netdev_hw_addr_refcnt(new->f, vsi->netdev, 1);

                if (retval)
                        goto err_no_memory_locked;

                spin_unlock_bh(&vsi->mac_filter_hash_lock);
        }

        /* Now process 'del_list' outside the lock */
        if (!hlist_empty(&tmp_del_list)) {
                filter_list_len = hw->aq.asq_buf_size /
                            sizeof(struct i40e_aqc_remove_macvlan_element_data);
                list_size = filter_list_len *
                            sizeof(struct i40e_aqc_remove_macvlan_element_data);
                del_list = kzalloc(list_size, GFP_ATOMIC);
                if (!del_list)
                        goto err_no_memory;

                hlist_for_each_entry_safe(f, h, &tmp_del_list, hlist) {
                        cmd_flags = 0;

                        /* handle broadcast filters by updating the broadcast
                         * promiscuous flag and release filter list.
                         */
                        if (is_broadcast_ether_addr(f->macaddr)) {
                                i40e_aqc_broadcast_filter(vsi, vsi_name, f);

                                hlist_del(&f->hlist);
                                kfree(f);
                                continue;
                        }

                        /* add to delete list */
                        ether_addr_copy(del_list[num_del].mac_addr, f->macaddr);
                        if (f->vlan == I40E_VLAN_ANY) {
                                del_list[num_del].vlan_tag = 0;
                                cmd_flags |= I40E_AQC_MACVLAN_DEL_IGNORE_VLAN;
                        } else {
                                del_list[num_del].vlan_tag =
                                        cpu_to_le16((u16)(f->vlan));
                        }

                        cmd_flags |= I40E_AQC_MACVLAN_DEL_PERFECT_MATCH;
                        del_list[num_del].flags = cmd_flags;
                        num_del++;

                        /* flush a full buffer */
                        if (num_del == filter_list_len) {
                                i40e_aqc_del_filters(vsi, vsi_name, del_list,
                                                     num_del, &retval);
                                memset(del_list, 0, list_size);
                                num_del = 0;
                        }
                        /* Release memory for MAC filter entries which were
                         * synced up with HW.
                         */
                        hlist_del(&f->hlist);
                        kfree(f);
                }

                if (num_del) {
                        i40e_aqc_del_filters(vsi, vsi_name, del_list,
                                             num_del, &retval);
                }

                kfree(del_list);
                del_list = NULL;
        }

        if (!hlist_empty(&tmp_add_list)) {
                /* Do all the adds now. */
                filter_list_len = hw->aq.asq_buf_size /
                               sizeof(struct i40e_aqc_add_macvlan_element_data);
                list_size = filter_list_len *
                               sizeof(struct i40e_aqc_add_macvlan_element_data);
                add_list = kzalloc(list_size, GFP_ATOMIC);
                if (!add_list)
                        goto err_no_memory;

                num_add = 0;
                hlist_for_each_entry_safe(new, h, &tmp_add_list, hlist) {
                        /* handle broadcast filters by updating the broadcast
                         * promiscuous flag instead of adding a MAC filter.
                         */
                        if (is_broadcast_ether_addr(new->f->macaddr)) {
                                if (i40e_aqc_broadcast_filter(vsi, vsi_name,
                                                              new->f))
                                        new->state = I40E_FILTER_FAILED;
                                else
                                        new->state = I40E_FILTER_ACTIVE;
                                continue;
                        }

                        /* add to add array */
                        if (num_add == 0)
                                add_head = new;
                        cmd_flags = 0;
                        ether_addr_copy(add_list[num_add].mac_addr,
                                        new->f->macaddr);
                        if (new->f->vlan == I40E_VLAN_ANY) {
                                add_list[num_add].vlan_tag = 0;
                                cmd_flags |= I40E_AQC_MACVLAN_ADD_IGNORE_VLAN;
                        } else {
                                add_list[num_add].vlan_tag =
                                        cpu_to_le16((u16)(new->f->vlan));
                        }
                        add_list[num_add].queue_number = 0;
                        /* set invalid match method for later detection */
                        add_list[num_add].match_method = I40E_AQC_MM_ERR_NO_RES;
                        cmd_flags |= I40E_AQC_MACVLAN_ADD_PERFECT_MATCH;
                        add_list[num_add].flags = cpu_to_le16(cmd_flags);
                        num_add++;

                        /* flush a full buffer */
                        if (num_add == filter_list_len) {
                                i40e_aqc_add_filters(vsi, vsi_name, add_list,
                                                     add_head, num_add);
                                memset(add_list, 0, list_size);
                                num_add = 0;
                        }
                }
                if (num_add) {
                        i40e_aqc_add_filters(vsi, vsi_name, add_list, add_head,
                                             num_add);
                }
                /* Now move all of the filters from the temp add list back to
                 * the VSI's list.
                 */
                spin_lock_bh(&vsi->mac_filter_hash_lock);
                hlist_for_each_entry_safe(new, h, &tmp_add_list, hlist) {
                        /* Only update the state if we're still NEW */
                        if (new->f->state == I40E_FILTER_NEW ||
                            new->f->state == I40E_FILTER_NEW_SYNC)
                                new->f->state = new->state;
                        hlist_del(&new->hlist);
                        netdev_hw_addr_refcnt(new->f, vsi->netdev, -1);
                        kfree(new);
                }
                spin_unlock_bh(&vsi->mac_filter_hash_lock);
                kfree(add_list);
                add_list = NULL;
        }

        /* Determine the number of active and failed filters. */
        spin_lock_bh(&vsi->mac_filter_hash_lock);
        vsi->active_filters = 0;
        hash_for_each(vsi->mac_filter_hash, bkt, f, hlist) {
                if (f->state == I40E_FILTER_ACTIVE)
                        vsi->active_filters++;
                else if (f->state == I40E_FILTER_FAILED)
                        failed_filters++;
        }
        spin_unlock_bh(&vsi->mac_filter_hash_lock);

        /* Check if we are able to exit overflow promiscuous mode. We can
         * safely exit if we didn't just enter, we no longer have any failed
         * filters, and we have reduced filters below the threshold value.
         */
        if (old_overflow && !failed_filters &&
            vsi->active_filters < vsi->promisc_threshold) {
                dev_info(&pf->pdev->dev,
                         "filter logjam cleared on %s, leaving overflow promiscuous mode\n",
                         vsi_name);
                clear_bit(__I40E_VSI_OVERFLOW_PROMISC, vsi->state);
                vsi->promisc_threshold = 0;
        }

        /* if the VF is not trusted do not do promisc */
        if (vsi->type == I40E_VSI_SRIOV && pf->vf &&
            !pf->vf[vsi->vf_id].trusted) {
                clear_bit(__I40E_VSI_OVERFLOW_PROMISC, vsi->state);
                goto out;
        }

        new_overflow = test_bit(__I40E_VSI_OVERFLOW_PROMISC, vsi->state);

        /* If we are entering overflow promiscuous, we need to calculate a new
         * threshold for when we are safe to exit
         */
        if (!old_overflow && new_overflow)
                vsi->promisc_threshold = (vsi->active_filters * 3) / 4;

        /* check for changes in promiscuous modes */
        if (changed_flags & IFF_ALLMULTI) {
                bool cur_multipromisc;

                cur_multipromisc = !!(vsi->current_netdev_flags & IFF_ALLMULTI);
                aq_ret = i40e_aq_set_vsi_multicast_promiscuous(&vsi->back->hw,
                                                               vsi->seid,
                                                               cur_multipromisc,
                                                               NULL);
                if (aq_ret) {
                        retval = i40e_aq_rc_to_posix(aq_ret,
                                                     hw->aq.asq_last_status);
                        dev_info(&pf->pdev->dev,
                                 "set multi promisc failed on %s, err %pe aq_err %s\n",
                                 vsi_name,
                                 ERR_PTR(aq_ret),
                                 i40e_aq_str(hw, hw->aq.asq_last_status));
                } else {
                        dev_info(&pf->pdev->dev, "%s allmulti mode.\n",
                                 cur_multipromisc ? "entering" : "leaving");
                }
        }

        if ((changed_flags & IFF_PROMISC) || old_overflow != new_overflow) {
                bool cur_promisc;

                cur_promisc = (!!(vsi->current_netdev_flags & IFF_PROMISC) ||
                               new_overflow);
                aq_ret = i40e_set_promiscuous(pf, cur_promisc);
                if (aq_ret) {
                        retval = i40e_aq_rc_to_posix(aq_ret,
                                                     hw->aq.asq_last_status);
                        dev_info(&pf->pdev->dev,
                                 "Setting promiscuous %s failed on %s, err %pe aq_err %s\n",
                                 cur_promisc ? "on" : "off",
                                 vsi_name,
                                 ERR_PTR(aq_ret),
                                 i40e_aq_str(hw, hw->aq.asq_last_status));
                }
        }
out:
        /* if something went wrong then set the changed flag so we try again */
        if (retval)
                vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;

        clear_bit(__I40E_VSI_SYNCING_FILTERS, vsi->state);
        return retval;

err_no_memory:
        /* Restore elements on the temporary add and delete lists */
        spin_lock_bh(&vsi->mac_filter_hash_lock);
err_no_memory_locked:
        i40e_undo_del_filter_entries(vsi, &tmp_del_list);
        i40e_undo_add_filter_entries(vsi, &tmp_add_list);
        spin_unlock_bh(&vsi->mac_filter_hash_lock);

        vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
        clear_bit(__I40E_VSI_SYNCING_FILTERS, vsi->state);
        return -ENOMEM;
}

/**
 * i40e_sync_filters_subtask - Sync the VSI filter list with HW
 * @pf: board private structure
 **/
static void i40e_sync_filters_subtask(struct i40e_pf *pf)
{
        struct i40e_vsi *vsi;
        int v;

        if (!pf)
                return;
        if (!test_and_clear_bit(__I40E_MACVLAN_SYNC_PENDING, pf->state))
                return;
        if (test_bit(__I40E_VF_DISABLE, pf->state)) {
                set_bit(__I40E_MACVLAN_SYNC_PENDING, pf->state);
                return;
        }

        i40e_pf_for_each_vsi(pf, v, vsi) {
                if ((vsi->flags & I40E_VSI_FLAG_FILTER_CHANGED) &&
                    !test_bit(__I40E_VSI_RELEASING, vsi->state)) {
                        int ret = i40e_sync_vsi_filters(vsi);

                        if (ret) {
                                /* come back and try again later */
                                set_bit(__I40E_MACVLAN_SYNC_PENDING,
                                        pf->state);
                                break;
                        }
                }
        }
}

/**
 * i40e_calculate_vsi_rx_buf_len - Calculates buffer length
 *
 * @vsi: VSI to calculate rx_buf_len from
 */
static u16 i40e_calculate_vsi_rx_buf_len(struct i40e_vsi *vsi)
{
        if (!vsi->netdev || test_bit(I40E_FLAG_LEGACY_RX_ENA, vsi->back->flags))
                return SKB_WITH_OVERHEAD(I40E_RXBUFFER_2048);

        return PAGE_SIZE < 8192 ? I40E_RXBUFFER_3072 : I40E_RXBUFFER_2048;
}

/**
 * i40e_max_vsi_frame_size - returns the maximum allowed frame size for VSI
 * @vsi: the vsi
 * @xdp_prog: XDP program
 **/
static int i40e_max_vsi_frame_size(struct i40e_vsi *vsi,
                                   struct bpf_prog *xdp_prog)
{
        u16 rx_buf_len = i40e_calculate_vsi_rx_buf_len(vsi);
        u16 chain_len;

        if (xdp_prog && !xdp_prog->aux->xdp_has_frags)
                chain_len = 1;
        else
                chain_len = I40E_MAX_CHAINED_RX_BUFFERS;

        return min_t(u16, rx_buf_len * chain_len, I40E_MAX_RXBUFFER);
}

/**
 * i40e_change_mtu - NDO callback to change the Maximum Transfer Unit
 * @netdev: network interface device structure
 * @new_mtu: new value for maximum frame size
 *
 * Returns 0 on success, negative on failure
 **/
static int i40e_change_mtu(struct net_device *netdev, int new_mtu)
{
        struct i40e_netdev_priv *np = netdev_priv(netdev);
        struct i40e_vsi *vsi = np->vsi;
        struct i40e_pf *pf = vsi->back;
        int frame_size;

        frame_size = i40e_max_vsi_frame_size(vsi, vsi->xdp_prog);
        if (new_mtu > frame_size - I40E_PACKET_HDR_PAD) {
                netdev_err(netdev, "Error changing mtu to %d, Max is %d\n",
                           new_mtu, frame_size - I40E_PACKET_HDR_PAD);
                return -EINVAL;
        }

        netdev_dbg(netdev, "changing MTU from %d to %d\n",
                   netdev->mtu, new_mtu);
        WRITE_ONCE(netdev->mtu, new_mtu);
        if (netif_running(netdev))
                i40e_vsi_reinit_locked(vsi);
        set_bit(__I40E_CLIENT_SERVICE_REQUESTED, pf->state);
        set_bit(__I40E_CLIENT_L2_CHANGE, pf->state);
        return 0;
}

/**
 * i40e_ioctl - Access the hwtstamp interface
 * @netdev: network interface device structure
 * @ifr: interface request data
 * @cmd: ioctl command
 **/
int i40e_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
{
        struct i40e_netdev_priv *np = netdev_priv(netdev);
        struct i40e_pf *pf = np->vsi->back;

        switch (cmd) {
        case SIOCGHWTSTAMP:
                return i40e_ptp_get_ts_config(pf, ifr);
        case SIOCSHWTSTAMP:
                return i40e_ptp_set_ts_config(pf, ifr);
        default:
                return -EOPNOTSUPP;
        }
}

/**
 * i40e_vlan_stripping_enable - Turn on vlan stripping for the VSI
 * @vsi: the vsi being adjusted
 **/
void i40e_vlan_stripping_enable(struct i40e_vsi *vsi)
{
        struct i40e_vsi_context ctxt;
        int ret;

        /* Don't modify stripping options if a port VLAN is active */
        if (vsi->info.pvid)
                return;

        if ((vsi->info.valid_sections &
             cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID)) &&
            ((vsi->info.port_vlan_flags & I40E_AQ_VSI_PVLAN_MODE_MASK) == 0))
                return;  /* already enabled */

        vsi->info.valid_sections = cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID);
        vsi->info.port_vlan_flags = I40E_AQ_VSI_PVLAN_MODE_ALL |
                                    I40E_AQ_VSI_PVLAN_EMOD_STR_BOTH;

        ctxt.seid = vsi->seid;
        ctxt.info = vsi->info;
        ret = i40e_aq_update_vsi_params(&vsi->back->hw, &ctxt, NULL);
        if (ret) {
                dev_info(&vsi->back->pdev->dev,
                         "update vlan stripping failed, err %pe aq_err %s\n",
                         ERR_PTR(ret),
                         i40e_aq_str(&vsi->back->hw,
                                     vsi->back->hw.aq.asq_last_status));
        }
}

/**
 * i40e_vlan_stripping_disable - Turn off vlan stripping for the VSI
 * @vsi: the vsi being adjusted
 **/
void i40e_vlan_stripping_disable(struct i40e_vsi *vsi)
{
        struct i40e_vsi_context ctxt;
        int ret;

        /* Don't modify stripping options if a port VLAN is active */
        if (vsi->info.pvid)
                return;

        if ((vsi->info.valid_sections &
             cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID)) &&
            ((vsi->info.port_vlan_flags & I40E_AQ_VSI_PVLAN_EMOD_MASK) ==
             I40E_AQ_VSI_PVLAN_EMOD_MASK))
                return;  /* already disabled */

        vsi->info.valid_sections = cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID);
        vsi->info.port_vlan_flags = I40E_AQ_VSI_PVLAN_MODE_ALL |
                                    I40E_AQ_VSI_PVLAN_EMOD_NOTHING;

        ctxt.seid = vsi->seid;
        ctxt.info = vsi->info;
        ret = i40e_aq_update_vsi_params(&vsi->back->hw, &ctxt, NULL);
        if (ret) {
                dev_info(&vsi->back->pdev->dev,
                         "update vlan stripping failed, err %pe aq_err %s\n",
                         ERR_PTR(ret),
                         i40e_aq_str(&vsi->back->hw,
                                     vsi->back->hw.aq.asq_last_status));
        }
}

/**
 * i40e_add_vlan_all_mac - Add a MAC/VLAN filter for each existing MAC address
 * @vsi: the vsi being configured
 * @vid: vlan id to be added (0 = untagged only , -1 = any)
 *
 * This is a helper function for adding a new MAC/VLAN filter with the
 * specified VLAN for each existing MAC address already in the hash table.
 * This function does *not* perform any accounting to update filters based on
 * VLAN mode.
 *
 * NOTE: this function expects to be called while under the
 * mac_filter_hash_lock
 **/
int i40e_add_vlan_all_mac(struct i40e_vsi *vsi, s16 vid)
{
        struct i40e_mac_filter *f, *add_f;
        struct hlist_node *h;
        int bkt;

        hash_for_each_safe(vsi->mac_filter_hash, bkt, h, f, hlist) {
                /* If we're asked to add a filter that has been marked for
                 * removal, it is safe to simply restore it to active state.
                 * __i40e_del_filter will have simply deleted any filters which
                 * were previously marked NEW or FAILED, so if it is currently
                 * marked REMOVE it must have previously been ACTIVE. Since we
                 * haven't yet run the sync filters task, just restore this
                 * filter to the ACTIVE state so that the sync task leaves it
                 * in place.
                 */
                if (f->state == I40E_FILTER_REMOVE && f->vlan == vid) {
                        f->state = I40E_FILTER_ACTIVE;
                        continue;
                } else if (f->state == I40E_FILTER_REMOVE) {
                        continue;
                }
                add_f = i40e_add_filter(vsi, f->macaddr, vid);
                if (!add_f) {
                        dev_info(&vsi->back->pdev->dev,
                                 "Could not add vlan filter %d for %pM\n",
                                 vid, f->macaddr);
                        return -ENOMEM;
                }
        }

        return 0;
}

/**
 * i40e_vsi_add_vlan - Add VSI membership for given VLAN
 * @vsi: the VSI being configured
 * @vid: VLAN id to be added
 **/
int i40e_vsi_add_vlan(struct i40e_vsi *vsi, u16 vid)
{
        int err;

        if (vsi->info.pvid)
                return -EINVAL;

        /* The network stack will attempt to add VID=0, with the intention to
         * receive priority tagged packets with a VLAN of 0. Our HW receives
         * these packets by default when configured to receive untagged
         * packets, so we don't need to add a filter for this case.
         * Additionally, HW interprets adding a VID=0 filter as meaning to
         * receive *only* tagged traffic and stops receiving untagged traffic.
         * Thus, we do not want to actually add a filter for VID=0
         */
        if (!vid)
                return 0;

        /* Locked once because all functions invoked below iterates list*/
        spin_lock_bh(&vsi->mac_filter_hash_lock);
        err = i40e_add_vlan_all_mac(vsi, vid);
        spin_unlock_bh(&vsi->mac_filter_hash_lock);
        if (err)
                return err;

        /* schedule our worker thread which will take care of
         * applying the new filter changes
         */
        i40e_service_event_schedule(vsi->back);
        return 0;
}

/**
 * i40e_rm_vlan_all_mac - Remove MAC/VLAN pair for all MAC with the given VLAN
 * @vsi: the vsi being configured
 * @vid: vlan id to be removed (0 = untagged only , -1 = any)
 *
 * This function should be used to remove all VLAN filters which match the
 * given VID. It does not schedule the service event and does not take the
 * mac_filter_hash_lock so it may be combined with other operations under
 * a single invocation of the mac_filter_hash_lock.
 *
 * NOTE: this function expects to be called while under the
 * mac_filter_hash_lock
 */
void i40e_rm_vlan_all_mac(struct i40e_vsi *vsi, s16 vid)
{
        struct i40e_mac_filter *f;
        struct hlist_node *h;
        int bkt;

        hash_for_each_safe(vsi->mac_filter_hash, bkt, h, f, hlist) {
                if (f->vlan == vid)
                        __i40e_del_filter(vsi, f);
        }
}

/**
 * i40e_vsi_kill_vlan - Remove VSI membership for given VLAN
 * @vsi: the VSI being configured
 * @vid: VLAN id to be removed
 **/
void i40e_vsi_kill_vlan(struct i40e_vsi *vsi, u16 vid)
{
        if (!vid || vsi->info.pvid)
                return;

        spin_lock_bh(&vsi->mac_filter_hash_lock);
        i40e_rm_vlan_all_mac(vsi, vid);
        spin_unlock_bh(&vsi->mac_filter_hash_lock);

        /* schedule our worker thread which will take care of
         * applying the new filter changes
         */
        i40e_service_event_schedule(vsi->back);
}

/**
 * i40e_vlan_rx_add_vid - Add a vlan id filter to HW offload
 * @netdev: network interface to be adjusted
 * @proto: unused protocol value
 * @vid: vlan id to be added
 *
 * net_device_ops implementation for adding vlan ids
 **/
static int i40e_vlan_rx_add_vid(struct net_device *netdev,
                                __always_unused __be16 proto, u16 vid)
{
        struct i40e_netdev_priv *np = netdev_priv(netdev);
        struct i40e_vsi *vsi = np->vsi;
        int ret = 0;

        if (vid >= VLAN_N_VID)
                return -EINVAL;

        ret = i40e_vsi_add_vlan(vsi, vid);
        if (!ret)
                set_bit(vid, vsi->active_vlans);

        return ret;
}

/**
 * i40e_vlan_rx_add_vid_up - Add a vlan id filter to HW offload in UP path
 * @netdev: network interface to be adjusted
 * @proto: unused protocol value
 * @vid: vlan id to be added
 **/
static void i40e_vlan_rx_add_vid_up(struct net_device *netdev,
                                    __always_unused __be16 proto, u16 vid)
{
        struct i40e_netdev_priv *np = netdev_priv(netdev);
        struct i40e_vsi *vsi = np->vsi;

        if (vid >= VLAN_N_VID)
                return;
        set_bit(vid, vsi->active_vlans);
}

/**
 * i40e_vlan_rx_kill_vid - Remove a vlan id filter from HW offload
 * @netdev: network interface to be adjusted
 * @proto: unused protocol value
 * @vid: vlan id to be removed
 *
 * net_device_ops implementation for removing vlan ids
 **/
static int i40e_vlan_rx_kill_vid(struct net_device *netdev,
                                 __always_unused __be16 proto, u16 vid)
{
        struct i40e_netdev_priv *np = netdev_priv(netdev);
        struct i40e_vsi *vsi = np->vsi;

        /* return code is ignored as there is nothing a user
         * can do about failure to remove and a log message was
         * already printed from the other function
         */
        i40e_vsi_kill_vlan(vsi, vid);

        clear_bit(vid, vsi->active_vlans);

        return 0;
}

/**
 * i40e_restore_vlan - Reinstate vlans when vsi/netdev comes back up
 * @vsi: the vsi being brought back up
 **/
static void i40e_restore_vlan(struct i40e_vsi *vsi)
{
        u16 vid;

        if (!vsi->netdev)
                return;

        if (vsi->netdev->features & NETIF_F_HW_VLAN_CTAG_RX)
                i40e_vlan_stripping_enable(vsi);
        else
                i40e_vlan_stripping_disable(vsi);

        for_each_set_bit(vid, vsi->active_vlans, VLAN_N_VID)
                i40e_vlan_rx_add_vid_up(vsi->netdev, htons(ETH_P_8021Q),
                                        vid);
}

/**
 * i40e_vsi_add_pvid - Add pvid for the VSI
 * @vsi: the vsi being adjusted
 * @vid: the vlan id to set as a PVID
 **/
int i40e_vsi_add_pvid(struct i40e_vsi *vsi, u16 vid)
{
        struct i40e_vsi_context ctxt;
        int ret;

        vsi->info.valid_sections = cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID);
        vsi->info.pvid = cpu_to_le16(vid);
        vsi->info.port_vlan_flags = I40E_AQ_VSI_PVLAN_MODE_TAGGED |
                                    I40E_AQ_VSI_PVLAN_INSERT_PVID |
                                    I40E_AQ_VSI_PVLAN_EMOD_STR;

        ctxt.seid = vsi->seid;
        ctxt.info = vsi->info;
        ret = i40e_aq_update_vsi_params(&vsi->back->hw, &ctxt, NULL);
        if (ret) {
                dev_info(&vsi->back->pdev->dev,
                         "add pvid failed, err %pe aq_err %s\n",
                         ERR_PTR(ret),
                         i40e_aq_str(&vsi->back->hw,
                                     vsi->back->hw.aq.asq_last_status));
                return -ENOENT;
        }

        return 0;
}

/**
 * i40e_vsi_remove_pvid - Remove the pvid from the VSI
 * @vsi: the vsi being adjusted
 *
 * Just use the vlan_rx_register() service to put it back to normal
 **/
void i40e_vsi_remove_pvid(struct i40e_vsi *vsi)
{
        vsi->info.pvid = 0;

        i40e_vlan_stripping_disable(vsi);
}

/**
 * i40e_vsi_setup_tx_resources - Allocate VSI Tx queue resources
 * @vsi: ptr to the VSI
 *
 * If this function returns with an error, then it's possible one or
 * more of the rings is populated (while the rest are not).  It is the
 * callers duty to clean those orphaned rings.
 *
 * Return 0 on success, negative on failure
 **/
static int i40e_vsi_setup_tx_resources(struct i40e_vsi *vsi)
{
        int i, err = 0;

        for (i = 0; i < vsi->num_queue_pairs && !err; i++)
                err = i40e_setup_tx_descriptors(vsi->tx_rings[i]);

        if (!i40e_enabled_xdp_vsi(vsi))
                return err;

        for (i = 0; i < vsi->num_queue_pairs && !err; i++)
                err = i40e_setup_tx_descriptors(vsi->xdp_rings[i]);

        return err;
}

/**
 * i40e_vsi_free_tx_resources - Free Tx resources for VSI queues
 * @vsi: ptr to the VSI
 *
 * Free VSI's transmit software resources
 **/
static void i40e_vsi_free_tx_resources(struct i40e_vsi *vsi)
{
        int i;

        if (vsi->tx_rings) {
                for (i = 0; i < vsi->num_queue_pairs; i++)
                        if (vsi->tx_rings[i] && vsi->tx_rings[i]->desc)
                                i40e_free_tx_resources(vsi->tx_rings[i]);
        }

        if (vsi->xdp_rings) {
                for (i = 0; i < vsi->num_queue_pairs; i++)
                        if (vsi->xdp_rings[i] && vsi->xdp_rings[i]->desc)
                                i40e_free_tx_resources(vsi->xdp_rings[i]);
        }
}

/**
 * i40e_vsi_setup_rx_resources - Allocate VSI queues Rx resources
 * @vsi: ptr to the VSI
 *
 * If this function returns with an error, then it's possible one or
 * more of the rings is populated (while the rest are not).  It is the
 * callers duty to clean those orphaned rings.
 *
 * Return 0 on success, negative on failure
 **/
static int i40e_vsi_setup_rx_resources(struct i40e_vsi *vsi)
{
        int i, err = 0;

        for (i = 0; i < vsi->num_queue_pairs && !err; i++)
                err = i40e_setup_rx_descriptors(vsi->rx_rings[i]);
        return err;
}

/**
 * i40e_vsi_free_rx_resources - Free Rx Resources for VSI queues
 * @vsi: ptr to the VSI
 *
 * Free all receive software resources
 **/
static void i40e_vsi_free_rx_resources(struct i40e_vsi *vsi)
{
        int i;

        if (!vsi->rx_rings)
                return;

        for (i = 0; i < vsi->num_queue_pairs; i++)
                if (vsi->rx_rings[i] && vsi->rx_rings[i]->desc)
                        i40e_free_rx_resources(vsi->rx_rings[i]);
}

/**
 * i40e_config_xps_tx_ring - Configure XPS for a Tx ring
 * @ring: The Tx ring to configure
 *
 * This enables/disables XPS for a given Tx descriptor ring
 * based on the TCs enabled for the VSI that ring belongs to.
 **/
static void i40e_config_xps_tx_ring(struct i40e_ring *ring)
{
        int cpu;

        if (!ring->q_vector || !ring->netdev || ring->ch)
                return;

        /* We only initialize XPS once, so as not to overwrite user settings */
        if (test_and_set_bit(__I40E_TX_XPS_INIT_DONE, ring->state))
                return;

        cpu = cpumask_local_spread(ring->q_vector->v_idx, -1);
        netif_set_xps_queue(ring->netdev, get_cpu_mask(cpu),
                            ring->queue_index);
}

/**
 * i40e_xsk_pool - Retrieve the AF_XDP buffer pool if XDP and ZC is enabled
 * @ring: The Tx or Rx ring
 *
 * Returns the AF_XDP buffer pool or NULL.
 **/
static struct xsk_buff_pool *i40e_xsk_pool(struct i40e_ring *ring)
{
        bool xdp_on = i40e_enabled_xdp_vsi(ring->vsi);
        int qid = ring->queue_index;

        if (ring_is_xdp(ring))
                qid -= ring->vsi->alloc_queue_pairs;

        if (!xdp_on || !test_bit(qid, ring->vsi->af_xdp_zc_qps))
                return NULL;

        return xsk_get_pool_from_qid(ring->vsi->netdev, qid);
}

/**
 * i40e_configure_tx_ring - Configure a transmit ring context and rest
 * @ring: The Tx ring to configure
 *
 * Configure the Tx descriptor ring in the HMC context.
 **/
static int i40e_configure_tx_ring(struct i40e_ring *ring)
{
        struct i40e_vsi *vsi = ring->vsi;
        u16 pf_q = vsi->base_queue + ring->queue_index;
        struct i40e_hw *hw = &vsi->back->hw;
        struct i40e_hmc_obj_txq tx_ctx;
        u32 qtx_ctl = 0;
        int err = 0;

        if (ring_is_xdp(ring))
                ring->xsk_pool = i40e_xsk_pool(ring);

        /* some ATR related tx ring init */
        if (test_bit(I40E_FLAG_FD_ATR_ENA, vsi->back->flags)) {
                ring->atr_sample_rate = I40E_DEFAULT_ATR_SAMPLE_RATE;
                ring->atr_count = 0;
        } else {
                ring->atr_sample_rate = 0;
        }

        /* configure XPS */
        i40e_config_xps_tx_ring(ring);

        /* clear the context structure first */
        memset(&tx_ctx, 0, sizeof(tx_ctx));

        tx_ctx.new_context = 1;
        tx_ctx.base = (ring->dma / 128);
        tx_ctx.qlen = ring->count;
        if (test_bit(I40E_FLAG_FD_SB_ENA, vsi->back->flags) ||
            test_bit(I40E_FLAG_FD_ATR_ENA, vsi->back->flags))
                tx_ctx.fd_ena = 1;
        if (test_bit(I40E_FLAG_PTP_ENA, vsi->back->flags))
                tx_ctx.timesync_ena = 1;
        /* FDIR VSI tx ring can still use RS bit and writebacks */
        if (vsi->type != I40E_VSI_FDIR)
                tx_ctx.head_wb_ena = 1;
        tx_ctx.head_wb_addr = ring->dma +
                              (ring->count * sizeof(struct i40e_tx_desc));

        /* As part of VSI creation/update, FW allocates certain
         * Tx arbitration queue sets for each TC enabled for
         * the VSI. The FW returns the handles to these queue
         * sets as part of the response buffer to Add VSI,
         * Update VSI, etc. AQ commands. It is expected that
         * these queue set handles be associated with the Tx
         * queues by the driver as part of the TX queue context
         * initialization. This has to be done regardless of
         * DCB as by default everything is mapped to TC0.
         */

        if (ring->ch)
                tx_ctx.rdylist =
                        le16_to_cpu(ring->ch->info.qs_handle[ring->dcb_tc]);

        else
                tx_ctx.rdylist = le16_to_cpu(vsi->info.qs_handle[ring->dcb_tc]);

        tx_ctx.rdylist_act = 0;

        /* clear the context in the HMC */
        err = i40e_clear_lan_tx_queue_context(hw, pf_q);
        if (err) {
                dev_info(&vsi->back->pdev->dev,
                         "Failed to clear LAN Tx queue context on Tx ring %d (pf_q %d), error: %d\n",
                         ring->queue_index, pf_q, err);
                return -ENOMEM;
        }

        /* set the context in the HMC */
        err = i40e_set_lan_tx_queue_context(hw, pf_q, &tx_ctx);
        if (err) {
                dev_info(&vsi->back->pdev->dev,
                         "Failed to set LAN Tx queue context on Tx ring %d (pf_q %d, error: %d\n",
                         ring->queue_index, pf_q, err);
                return -ENOMEM;
        }

        /* Now associate this queue with this PCI function */
        if (ring->ch) {
                if (ring->ch->type == I40E_VSI_VMDQ2)
                        qtx_ctl = I40E_QTX_CTL_VM_QUEUE;
                else
                        return -EINVAL;

                qtx_ctl |= FIELD_PREP(I40E_QTX_CTL_VFVM_INDX_MASK,
                                      ring->ch->vsi_number);
        } else {
                if (vsi->type == I40E_VSI_VMDQ2) {
                        qtx_ctl = I40E_QTX_CTL_VM_QUEUE;
                        qtx_ctl |= FIELD_PREP(I40E_QTX_CTL_VFVM_INDX_MASK,
                                              vsi->id);
                } else {
                        qtx_ctl = I40E_QTX_CTL_PF_QUEUE;
                }
        }

        qtx_ctl |= FIELD_PREP(I40E_QTX_CTL_PF_INDX_MASK, hw->pf_id);
        wr32(hw, I40E_QTX_CTL(pf_q), qtx_ctl);
        i40e_flush(hw);

        /* cache tail off for easier writes later */
        ring->tail = hw->hw_addr + I40E_QTX_TAIL(pf_q);

        return 0;
}

/**
 * i40e_rx_offset - Return expected offset into page to access data
 * @rx_ring: Ring we are requesting offset of
 *
 * Returns the offset value for ring into the data buffer.
 */
static unsigned int i40e_rx_offset(struct i40e_ring *rx_ring)
{
        return ring_uses_build_skb(rx_ring) ? I40E_SKB_PAD : 0;
}

/**
 * i40e_configure_rx_ring - Configure a receive ring context
 * @ring: The Rx ring to configure
 *
 * Configure the Rx descriptor ring in the HMC context.
 **/
static int i40e_configure_rx_ring(struct i40e_ring *ring)
{
        struct i40e_vsi *vsi = ring->vsi;
        u32 chain_len = vsi->back->hw.func_caps.rx_buf_chain_len;
        u16 pf_q = vsi->base_queue + ring->queue_index;
        struct i40e_hw *hw = &vsi->back->hw;
        struct i40e_hmc_obj_rxq rx_ctx;
        int err = 0;
        bool ok;

        bitmap_zero(ring->state, __I40E_RING_STATE_NBITS);

        /* clear the context structure first */
        memset(&rx_ctx, 0, sizeof(rx_ctx));

        ring->rx_buf_len = vsi->rx_buf_len;

        /* XDP RX-queue info only needed for RX rings exposed to XDP */
        if (ring->vsi->type != I40E_VSI_MAIN)
                goto skip;

        if (!xdp_rxq_info_is_reg(&ring->xdp_rxq)) {
                err = __xdp_rxq_info_reg(&ring->xdp_rxq, ring->netdev,
                                         ring->queue_index,
                                         ring->q_vector->napi.napi_id,
                                         ring->rx_buf_len);
                if (err)
                        return err;
        }

        ring->xsk_pool = i40e_xsk_pool(ring);
        if (ring->xsk_pool) {
                xdp_rxq_info_unreg(&ring->xdp_rxq);
                ring->rx_buf_len = xsk_pool_get_rx_frame_size(ring->xsk_pool);
                err = __xdp_rxq_info_reg(&ring->xdp_rxq, ring->netdev,
                                         ring->queue_index,
                                         ring->q_vector->napi.napi_id,
                                         ring->rx_buf_len);
                if (err)
                        return err;
                err = xdp_rxq_info_reg_mem_model(&ring->xdp_rxq,
                                                 MEM_TYPE_XSK_BUFF_POOL,
                                                 NULL);
                if (err)
                        return err;
                dev_info(&vsi->back->pdev->dev,
                         "Registered XDP mem model MEM_TYPE_XSK_BUFF_POOL on Rx ring %d\n",
                         ring->queue_index);

        } else {
                err = xdp_rxq_info_reg_mem_model(&ring->xdp_rxq,
                                                 MEM_TYPE_PAGE_SHARED,
                                                 NULL);
                if (err)
                        return err;
        }

skip:
        xdp_init_buff(&ring->xdp, i40e_rx_pg_size(ring) / 2, &ring->xdp_rxq);

        rx_ctx.dbuff = DIV_ROUND_UP(ring->rx_buf_len,
                                    BIT_ULL(I40E_RXQ_CTX_DBUFF_SHIFT));

        rx_ctx.base = (ring->dma / 128);
        rx_ctx.qlen = ring->count;

        /* use 16 byte descriptors */
        rx_ctx.dsize = 0;

        /* descriptor type is always zero
         * rx_ctx.dtype = 0;
         */
        rx_ctx.hsplit_0 = 0;

        rx_ctx.rxmax = min_t(u16, vsi->max_frame, chain_len * ring->rx_buf_len);
        if (hw->revision_id == 0)
                rx_ctx.lrxqthresh = 0;
        else
                rx_ctx.lrxqthresh = 1;
        rx_ctx.crcstrip = 1;
        rx_ctx.l2tsel = 1;
        /* this controls whether VLAN is stripped from inner headers */
        rx_ctx.showiv = 0;
        /* set the prefena field to 1 because the manual says to */
        rx_ctx.prefena = 1;

        /* clear the context in the HMC */
        err = i40e_clear_lan_rx_queue_context(hw, pf_q);
        if (err) {
                dev_info(&vsi->back->pdev->dev,
                         "Failed to clear LAN Rx queue context on Rx ring %d (pf_q %d), error: %d\n",
                         ring->queue_index, pf_q, err);
                return -ENOMEM;
        }

        /* set the context in the HMC */
        err = i40e_set_lan_rx_queue_context(hw, pf_q, &rx_ctx);
        if (err) {
                dev_info(&vsi->back->pdev->dev,
                         "Failed to set LAN Rx queue context on Rx ring %d (pf_q %d), error: %d\n",
                         ring->queue_index, pf_q, err);
                return -ENOMEM;
        }

        /* configure Rx buffer alignment */
        if (!vsi->netdev || test_bit(I40E_FLAG_LEGACY_RX_ENA, vsi->back->flags)) {
                if (I40E_2K_TOO_SMALL_WITH_PADDING) {
                        dev_info(&vsi->back->pdev->dev,
                                 "2k Rx buffer is too small to fit standard MTU and skb_shared_info\n");
                        return -EOPNOTSUPP;
                }
                clear_ring_build_skb_enabled(ring);
        } else {
                set_ring_build_skb_enabled(ring);
        }

        ring->rx_offset = i40e_rx_offset(ring);

        /* cache tail for quicker writes, and clear the reg before use */
        ring->tail = hw->hw_addr + I40E_QRX_TAIL(pf_q);
        writel(0, ring->tail);

        if (ring->xsk_pool) {
                xsk_pool_set_rxq_info(ring->xsk_pool, &ring->xdp_rxq);
                ok = i40e_alloc_rx_buffers_zc(ring, I40E_DESC_UNUSED(ring));
        } else {
                ok = !i40e_alloc_rx_buffers(ring, I40E_DESC_UNUSED(ring));
        }
        if (!ok) {
                /* Log this in case the user has forgotten to give the kernel
                 * any buffers, even later in the application.
                 */
                dev_info(&vsi->back->pdev->dev,
                         "Failed to allocate some buffers on %sRx ring %d (pf_q %d)\n",
                         ring->xsk_pool ? "AF_XDP ZC enabled " : "",
                         ring->queue_index, pf_q);
        }

        return 0;
}

/**
 * i40e_vsi_configure_tx - Configure the VSI for Tx
 * @vsi: VSI structure describing this set of rings and resources
 *
 * Configure the Tx VSI for operation.
 **/
static int i40e_vsi_configure_tx(struct i40e_vsi *vsi)
{
        int err = 0;
        u16 i;

        for (i = 0; (i < vsi->num_queue_pairs) && !err; i++)
                err = i40e_configure_tx_ring(vsi->tx_rings[i]);

        if (err || !i40e_enabled_xdp_vsi(vsi))
                return err;

        for (i = 0; (i < vsi->num_queue_pairs) && !err; i++)
                err = i40e_configure_tx_ring(vsi->xdp_rings[i]);

        return err;
}

/**
 * i40e_vsi_configure_rx - Configure the VSI for Rx
 * @vsi: the VSI being configured
 *
 * Configure the Rx VSI for operation.
 **/
static int i40e_vsi_configure_rx(struct i40e_vsi *vsi)
{
        int err = 0;
        u16 i;

        vsi->max_frame = i40e_max_vsi_frame_size(vsi, vsi->xdp_prog);
        vsi->rx_buf_len = i40e_calculate_vsi_rx_buf_len(vsi);

#if (PAGE_SIZE < 8192)
        if (vsi->netdev && !I40E_2K_TOO_SMALL_WITH_PADDING &&
            vsi->netdev->mtu <= ETH_DATA_LEN) {
                vsi->rx_buf_len = I40E_RXBUFFER_1536 - NET_IP_ALIGN;
                vsi->max_frame = vsi->rx_buf_len;
        }
#endif

        /* set up individual rings */
        for (i = 0; i < vsi->num_queue_pairs && !err; i++)
                err = i40e_configure_rx_ring(vsi->rx_rings[i]);

        return err;
}

/**
 * i40e_vsi_config_dcb_rings - Update rings to reflect DCB TC
 * @vsi: ptr to the VSI
 **/
static void i40e_vsi_config_dcb_rings(struct i40e_vsi *vsi)
{
        struct i40e_ring *tx_ring, *rx_ring;
        u16 qoffset, qcount;
        int i, n;

        if (!test_bit(I40E_FLAG_DCB_ENA, vsi->back->flags)) {
                /* Reset the TC information */
                for (i = 0; i < vsi->num_queue_pairs; i++) {
                        rx_ring = vsi->rx_rings[i];
                        tx_ring = vsi->tx_rings[i];
                        rx_ring->dcb_tc = 0;
                        tx_ring->dcb_tc = 0;
                }
                return;
        }

        for (n = 0; n < I40E_MAX_TRAFFIC_CLASS; n++) {
                if (!(vsi->tc_config.enabled_tc & BIT_ULL(n)))
                        continue;

                qoffset = vsi->tc_config.tc_info[n].qoffset;
                qcount = vsi->tc_config.tc_info[n].qcount;
                for (i = qoffset; i < (qoffset + qcount); i++) {
                        rx_ring = vsi->rx_rings[i];
                        tx_ring = vsi->tx_rings[i];
                        rx_ring->dcb_tc = n;
                        tx_ring->dcb_tc = n;
                }
        }
}

/**
 * i40e_set_vsi_rx_mode - Call set_rx_mode on a VSI
 * @vsi: ptr to the VSI
 **/
static void i40e_set_vsi_rx_mode(struct i40e_vsi *vsi)
{
        if (vsi->netdev)
                i40e_set_rx_mode(vsi->netdev);
}

/**
 * i40e_reset_fdir_filter_cnt - Reset flow director filter counters
 * @pf: Pointer to the targeted PF
 *
 * Set all flow director counters to 0.
 */
static void i40e_reset_fdir_filter_cnt(struct i40e_pf *pf)
{
        pf->fd_tcp4_filter_cnt = 0;
        pf->fd_udp4_filter_cnt = 0;
        pf->fd_sctp4_filter_cnt = 0;
        pf->fd_ip4_filter_cnt = 0;
        pf->fd_tcp6_filter_cnt = 0;
        pf->fd_udp6_filter_cnt = 0;
        pf->fd_sctp6_filter_cnt = 0;
        pf->fd_ip6_filter_cnt = 0;
}

/**
 * i40e_fdir_filter_restore - Restore the Sideband Flow Director filters
 * @vsi: Pointer to the targeted VSI
 *
 * This function replays the hlist on the hw where all the SB Flow Director
 * filters were saved.
 **/
static void i40e_fdir_filter_restore(struct i40e_vsi *vsi)
{
        struct i40e_fdir_filter *filter;
        struct i40e_pf *pf = vsi->back;
        struct hlist_node *node;

        if (!test_bit(I40E_FLAG_FD_SB_ENA, pf->flags))
                return;

        /* Reset FDir counters as we're replaying all existing filters */
        i40e_reset_fdir_filter_cnt(pf);

        hlist_for_each_entry_safe(filter, node,
                                  &pf->fdir_filter_list, fdir_node) {
                i40e_add_del_fdir(vsi, filter, true);
        }
}

/**
 * i40e_vsi_configure - Set up the VSI for action
 * @vsi: the VSI being configured
 **/
static int i40e_vsi_configure(struct i40e_vsi *vsi)
{
        int err;

        i40e_set_vsi_rx_mode(vsi);
        i40e_restore_vlan(vsi);
        i40e_vsi_config_dcb_rings(vsi);
        err = i40e_vsi_configure_tx(vsi);
        if (!err)
                err = i40e_vsi_configure_rx(vsi);

        return err;
}

/**
 * i40e_vsi_configure_msix - MSIX mode Interrupt Config in the HW
 * @vsi: the VSI being configured
 **/
static void i40e_vsi_configure_msix(struct i40e_vsi *vsi)
{
        bool has_xdp = i40e_enabled_xdp_vsi(vsi);
        struct i40e_pf *pf = vsi->back;
        struct i40e_hw *hw = &pf->hw;
        u16 vector;
        int i, q;
        u32 qp;

        /* The interrupt indexing is offset by 1 in the PFINT_ITRn
         * and PFINT_LNKLSTn registers, e.g.:
         *   PFINT_ITRn[0..n-1] gets msix-1..msix-n  (qpair interrupts)
         */
        qp = vsi->base_queue;
        vector = vsi->base_vector;
        for (i = 0; i < vsi->num_q_vectors; i++, vector++) {
                struct i40e_q_vector *q_vector = vsi->q_vectors[i];

                q_vector->rx.next_update = jiffies + 1;
                q_vector->rx.target_itr =
                        ITR_TO_REG(vsi->rx_rings[i]->itr_setting);
                wr32(hw, I40E_PFINT_ITRN(I40E_RX_ITR, vector - 1),
                     q_vector->rx.target_itr >> 1);
                q_vector->rx.current_itr = q_vector->rx.target_itr;

                q_vector->tx.next_update = jiffies + 1;
                q_vector->tx.target_itr =
                        ITR_TO_REG(vsi->tx_rings[i]->itr_setting);
                wr32(hw, I40E_PFINT_ITRN(I40E_TX_ITR, vector - 1),
                     q_vector->tx.target_itr >> 1);
                q_vector->tx.current_itr = q_vector->tx.target_itr;

                /* Set ITR for software interrupts triggered after exiting
                 * busy-loop polling.
                 */
                wr32(hw, I40E_PFINT_ITRN(I40E_SW_ITR, vector - 1),
                     I40E_ITR_20K);

                wr32(hw, I40E_PFINT_RATEN(vector - 1),
                     i40e_intrl_usec_to_reg(vsi->int_rate_limit));

                /* begin of linked list for RX queue assigned to this vector */
                wr32(hw, I40E_PFINT_LNKLSTN(vector - 1), qp);
                for (q = 0; q < q_vector->num_ringpairs; q++) {
                        u32 nextqp = has_xdp ? qp + vsi->alloc_queue_pairs : qp;
                        u32 val;

                        val = I40E_QINT_RQCTL_CAUSE_ENA_MASK |
                              (I40E_RX_ITR << I40E_QINT_RQCTL_ITR_INDX_SHIFT) |
                              (vector << I40E_QINT_RQCTL_MSIX_INDX_SHIFT) |
                              (nextqp << I40E_QINT_RQCTL_NEXTQ_INDX_SHIFT) |
                              (I40E_QUEUE_TYPE_TX <<
                               I40E_QINT_RQCTL_NEXTQ_TYPE_SHIFT);

                        wr32(hw, I40E_QINT_RQCTL(qp), val);

                        if (has_xdp) {
                                /* TX queue with next queue set to TX */
                                val = I40E_QINT_TQCTL_CAUSE_ENA_MASK |
                                      (I40E_TX_ITR << I40E_QINT_TQCTL_ITR_INDX_SHIFT) |
                                      (vector << I40E_QINT_TQCTL_MSIX_INDX_SHIFT) |
                                      (qp << I40E_QINT_TQCTL_NEXTQ_INDX_SHIFT) |
                                      (I40E_QUEUE_TYPE_TX <<
                                       I40E_QINT_TQCTL_NEXTQ_TYPE_SHIFT);

                                wr32(hw, I40E_QINT_TQCTL(nextqp), val);
                        }
                        /* TX queue with next RX or end of linked list */
                        val = I40E_QINT_TQCTL_CAUSE_ENA_MASK |
                              (I40E_TX_ITR << I40E_QINT_TQCTL_ITR_INDX_SHIFT) |
                              (vector << I40E_QINT_TQCTL_MSIX_INDX_SHIFT) |
                              ((qp + 1) << I40E_QINT_TQCTL_NEXTQ_INDX_SHIFT) |
                              (I40E_QUEUE_TYPE_RX <<
                               I40E_QINT_TQCTL_NEXTQ_TYPE_SHIFT);

                        /* Terminate the linked list */
                        if (q == (q_vector->num_ringpairs - 1))
                                val |= (I40E_QUEUE_END_OF_LIST <<
                                        I40E_QINT_TQCTL_NEXTQ_INDX_SHIFT);

                        wr32(hw, I40E_QINT_TQCTL(qp), val);
                        qp++;
                }
        }

        i40e_flush(hw);
}

/**
 * i40e_enable_misc_int_causes - enable the non-queue interrupts
 * @pf: pointer to private device data structure
 **/
static void i40e_enable_misc_int_causes(struct i40e_pf *pf)
{
        struct i40e_hw *hw = &pf->hw;
        u32 val;

        /* clear things first */
        wr32(hw, I40E_PFINT_ICR0_ENA, 0);  /* disable all */
        rd32(hw, I40E_PFINT_ICR0);         /* read to clear */

        val = I40E_PFINT_ICR0_ENA_ECC_ERR_MASK       |
              I40E_PFINT_ICR0_ENA_MAL_DETECT_MASK    |
              I40E_PFINT_ICR0_ENA_GRST_MASK          |
              I40E_PFINT_ICR0_ENA_PCI_EXCEPTION_MASK |
              I40E_PFINT_ICR0_ENA_GPIO_MASK          |
              I40E_PFINT_ICR0_ENA_HMC_ERR_MASK       |
              I40E_PFINT_ICR0_ENA_VFLR_MASK          |
              I40E_PFINT_ICR0_ENA_ADMINQ_MASK;

        if (test_bit(I40E_FLAG_IWARP_ENA, pf->flags))
                val |= I40E_PFINT_ICR0_ENA_PE_CRITERR_MASK;

        if (test_bit(I40E_FLAG_PTP_ENA, pf->flags))
                val |= I40E_PFINT_ICR0_ENA_TIMESYNC_MASK;

        wr32(hw, I40E_PFINT_ICR0_ENA, val);

        /* SW_ITR_IDX = 0, but don't change INTENA */
        wr32(hw, I40E_PFINT_DYN_CTL0, I40E_PFINT_DYN_CTL0_SW_ITR_INDX_MASK |
                                        I40E_PFINT_DYN_CTL0_INTENA_MSK_MASK);

        /* OTHER_ITR_IDX = 0 */
        wr32(hw, I40E_PFINT_STAT_CTL0, 0);
}

/**
 * i40e_configure_msi_and_legacy - Legacy mode interrupt config in the HW
 * @vsi: the VSI being configured
 **/
static void i40e_configure_msi_and_legacy(struct i40e_vsi *vsi)
{
        u32 nextqp = i40e_enabled_xdp_vsi(vsi) ? vsi->alloc_queue_pairs : 0;
        struct i40e_q_vector *q_vector = vsi->q_vectors[0];
        struct i40e_pf *pf = vsi->back;
        struct i40e_hw *hw = &pf->hw;

        /* set the ITR configuration */
        q_vector->rx.next_update = jiffies + 1;
        q_vector->rx.target_itr = ITR_TO_REG(vsi->rx_rings[0]->itr_setting);
        wr32(hw, I40E_PFINT_ITR0(I40E_RX_ITR), q_vector->rx.target_itr >> 1);
        q_vector->rx.current_itr = q_vector->rx.target_itr;
        q_vector->tx.next_update = jiffies + 1;
        q_vector->tx.target_itr = ITR_TO_REG(vsi->tx_rings[0]->itr_setting);
        wr32(hw, I40E_PFINT_ITR0(I40E_TX_ITR), q_vector->tx.target_itr >> 1);
        q_vector->tx.current_itr = q_vector->tx.target_itr;

        i40e_enable_misc_int_causes(pf);

        /* FIRSTQ_INDX = 0, FIRSTQ_TYPE = 0 (rx) */
        wr32(hw, I40E_PFINT_LNKLST0, 0);

        /* Associate the queue pair to the vector and enable the queue
         * interrupt RX queue in linked list with next queue set to TX
         */
        wr32(hw, I40E_QINT_RQCTL(0), I40E_QINT_RQCTL_VAL(nextqp, 0, TX));

        if (i40e_enabled_xdp_vsi(vsi)) {
                /* TX queue in linked list with next queue set to TX */
                wr32(hw, I40E_QINT_TQCTL(nextqp),
                     I40E_QINT_TQCTL_VAL(nextqp, 0, TX));
        }

        /* last TX queue so the next RX queue doesn't matter */
        wr32(hw, I40E_QINT_TQCTL(0),
             I40E_QINT_TQCTL_VAL(I40E_QUEUE_END_OF_LIST, 0, RX));
        i40e_flush(hw);
}

/**
 * i40e_irq_dynamic_disable_icr0 - Disable default interrupt generation for icr0
 * @pf: board private structure
 **/
void i40e_irq_dynamic_disable_icr0(struct i40e_pf *pf)
{
        struct i40e_hw *hw = &pf->hw;

        wr32(hw, I40E_PFINT_DYN_CTL0,
             I40E_ITR_NONE << I40E_PFINT_DYN_CTLN_ITR_INDX_SHIFT);
        i40e_flush(hw);
}

/**
 * i40e_irq_dynamic_enable_icr0 - Enable default interrupt generation for icr0
 * @pf: board private structure
 **/
void i40e_irq_dynamic_enable_icr0(struct i40e_pf *pf)
{
        struct i40e_hw *hw = &pf->hw;
        u32 val;

        val = I40E_PFINT_DYN_CTL0_INTENA_MASK   |
              I40E_PFINT_DYN_CTL0_CLEARPBA_MASK |
              (I40E_ITR_NONE << I40E_PFINT_DYN_CTL0_ITR_INDX_SHIFT);

        wr32(hw, I40E_PFINT_DYN_CTL0, val);
        i40e_flush(hw);
}

/**
 * i40e_msix_clean_rings - MSIX mode Interrupt Handler
 * @irq: interrupt number
 * @data: pointer to a q_vector
 **/
static irqreturn_t i40e_msix_clean_rings(int irq, void *data)
{
        struct i40e_q_vector *q_vector = data;

        if (!q_vector->tx.ring && !q_vector->rx.ring)
                return IRQ_HANDLED;

        napi_schedule_irqoff(&q_vector->napi);

        return IRQ_HANDLED;
}

/**
 * i40e_irq_affinity_notify - Callback for affinity changes
 * @notify: context as to what irq was changed
 * @mask: the new affinity mask
 *
 * This is a callback function used by the irq_set_affinity_notifier function
 * so that we may register to receive changes to the irq affinity masks.
 **/
static void i40e_irq_affinity_notify(struct irq_affinity_notify *notify,
                                     const cpumask_t *mask)
{
        struct i40e_q_vector *q_vector =
                container_of(notify, struct i40e_q_vector, affinity_notify);

        cpumask_copy(&q_vector->affinity_mask, mask);
}

/**
 * i40e_irq_affinity_release - Callback for affinity notifier release
 * @ref: internal core kernel usage
 *
 * This is a callback function used by the irq_set_affinity_notifier function
 * to inform the current notification subscriber that they will no longer
 * receive notifications.
 **/
static void i40e_irq_affinity_release(struct kref *ref) {}

/**
 * i40e_vsi_request_irq_msix - Initialize MSI-X interrupts
 * @vsi: the VSI being configured
 * @basename: name for the vector
 *
 * Allocates MSI-X vectors and requests interrupts from the kernel.
 **/
static int i40e_vsi_request_irq_msix(struct i40e_vsi *vsi, char *basename)
{
        int q_vectors = vsi->num_q_vectors;
        struct i40e_pf *pf = vsi->back;
        int base = vsi->base_vector;
        int rx_int_idx = 0;
        int tx_int_idx = 0;
        int vector, err;
        int irq_num;
        int cpu;

        for (vector = 0; vector < q_vectors; vector++) {
                struct i40e_q_vector *q_vector = vsi->q_vectors[vector];

                irq_num = pf->msix_entries[base + vector].vector;

                if (q_vector->tx.ring && q_vector->rx.ring) {
                        snprintf(q_vector->name, sizeof(q_vector->name) - 1,
                                 "%s-%s-%d", basename, "TxRx", rx_int_idx++);
                        tx_int_idx++;
                } else if (q_vector->rx.ring) {
                        snprintf(q_vector->name, sizeof(q_vector->name) - 1,
                                 "%s-%s-%d", basename, "rx", rx_int_idx++);
                } else if (q_vector->tx.ring) {
                        snprintf(q_vector->name, sizeof(q_vector->name) - 1,
                                 "%s-%s-%d", basename, "tx", tx_int_idx++);
                } else {
                        /* skip this unused q_vector */
                        continue;
                }
                err = request_irq(irq_num,
                                  vsi->irq_handler,
                                  0,
                                  q_vector->name,
                                  q_vector);
                if (err) {
                        dev_info(&pf->pdev->dev,
                                 "MSIX request_irq failed, error: %d\n", err);
                        goto free_queue_irqs;
                }

                /* register for affinity change notifications */
                q_vector->irq_num = irq_num;
                q_vector->affinity_notify.notify = i40e_irq_affinity_notify;
                q_vector->affinity_notify.release = i40e_irq_affinity_release;
                irq_set_affinity_notifier(irq_num, &q_vector->affinity_notify);
                /* Spread affinity hints out across online CPUs.
                 *
                 * get_cpu_mask returns a static constant mask with
                 * a permanent lifetime so it's ok to pass to
                 * irq_update_affinity_hint without making a copy.
                 */
                cpu = cpumask_local_spread(q_vector->v_idx, -1);
                irq_update_affinity_hint(irq_num, get_cpu_mask(cpu));
        }

        vsi->irqs_ready = true;
        return 0;

free_queue_irqs:
        while (vector) {
                vector--;
                irq_num = pf->msix_entries[base + vector].vector;
                irq_set_affinity_notifier(irq_num, NULL);
                irq_update_affinity_hint(irq_num, NULL);
                free_irq(irq_num, &vsi->q_vectors[vector]);
        }
        return err;
}

/**
 * i40e_vsi_disable_irq - Mask off queue interrupt generation on the VSI
 * @vsi: the VSI being un-configured
 **/
static void i40e_vsi_disable_irq(struct i40e_vsi *vsi)
{
        struct i40e_pf *pf = vsi->back;
        struct i40e_hw *hw = &pf->hw;
        int base = vsi->base_vector;
        int i;

        /* disable interrupt causation from each queue */
        for (i = 0; i < vsi->num_queue_pairs; i++) {
                u32 val;

                val = rd32(hw, I40E_QINT_TQCTL(vsi->tx_rings[i]->reg_idx));
                val &= ~I40E_QINT_TQCTL_CAUSE_ENA_MASK;
                wr32(hw, I40E_QINT_TQCTL(vsi->tx_rings[i]->reg_idx), val);

                val = rd32(hw, I40E_QINT_RQCTL(vsi->rx_rings[i]->reg_idx));
                val &= ~I40E_QINT_RQCTL_CAUSE_ENA_MASK;
                wr32(hw, I40E_QINT_RQCTL(vsi->rx_rings[i]->reg_idx), val);

                if (!i40e_enabled_xdp_vsi(vsi))
                        continue;
                wr32(hw, I40E_QINT_TQCTL(vsi->xdp_rings[i]->reg_idx), 0);
        }

        /* disable each interrupt */
        if (test_bit(I40E_FLAG_MSIX_ENA, pf->flags)) {
                for (i = vsi->base_vector;
                     i < (vsi->num_q_vectors + vsi->base_vector); i++)
                        wr32(hw, I40E_PFINT_DYN_CTLN(i - 1), 0);

                i40e_flush(hw);
                for (i = 0; i < vsi->num_q_vectors; i++)
                        synchronize_irq(pf->msix_entries[i + base].vector);
        } else {
                /* Legacy and MSI mode - this stops all interrupt handling */
                wr32(hw, I40E_PFINT_ICR0_ENA, 0);
                wr32(hw, I40E_PFINT_DYN_CTL0, 0);
                i40e_flush(hw);
                synchronize_irq(pf->pdev->irq);
        }
}

/**
 * i40e_vsi_enable_irq - Enable IRQ for the given VSI
 * @vsi: the VSI being configured
 **/
static int i40e_vsi_enable_irq(struct i40e_vsi *vsi)
{
        struct i40e_pf *pf = vsi->back;
        int i;

        if (test_bit(I40E_FLAG_MSIX_ENA, pf->flags)) {
                for (i = 0; i < vsi->num_q_vectors; i++)
                        i40e_irq_dynamic_enable(vsi, i);
        } else {
                i40e_irq_dynamic_enable_icr0(pf);
        }

        i40e_flush(&pf->hw);
        return 0;
}

/**
 * i40e_free_misc_vector - Free the vector that handles non-queue events
 * @pf: board private structure
 **/
static void i40e_free_misc_vector(struct i40e_pf *pf)
{
        /* Disable ICR 0 */
        wr32(&pf->hw, I40E_PFINT_ICR0_ENA, 0);
        i40e_flush(&pf->hw);

        if (test_bit(I40E_FLAG_MSIX_ENA, pf->flags) && pf->msix_entries) {
                free_irq(pf->msix_entries[0].vector, pf);
                clear_bit(__I40E_MISC_IRQ_REQUESTED, pf->state);
        }
}

/**
 * i40e_intr - MSI/Legacy and non-queue interrupt handler
 * @irq: interrupt number
 * @data: pointer to a q_vector
 *
 * This is the handler used for all MSI/Legacy interrupts, and deals
 * with both queue and non-queue interrupts.  This is also used in
 * MSIX mode to handle the non-queue interrupts.
 **/
static irqreturn_t i40e_intr(int irq, void *data)
{
        struct i40e_pf *pf = (struct i40e_pf *)data;
        struct i40e_hw *hw = &pf->hw;
        irqreturn_t ret = IRQ_NONE;
        u32 icr0, icr0_remaining;
        u32 val, ena_mask;

        icr0 = rd32(hw, I40E_PFINT_ICR0);
        ena_mask = rd32(hw, I40E_PFINT_ICR0_ENA);

        /* if sharing a legacy IRQ, we might get called w/o an intr pending */
        if ((icr0 & I40E_PFINT_ICR0_INTEVENT_MASK) == 0)
                goto enable_intr;

        /* if interrupt but no bits showing, must be SWINT */
        if (((icr0 & ~I40E_PFINT_ICR0_INTEVENT_MASK) == 0) ||
            (icr0 & I40E_PFINT_ICR0_SWINT_MASK))
                pf->sw_int_count++;

        if (test_bit(I40E_FLAG_IWARP_ENA, pf->flags) &&
            (icr0 & I40E_PFINT_ICR0_ENA_PE_CRITERR_MASK)) {
                ena_mask &= ~I40E_PFINT_ICR0_ENA_PE_CRITERR_MASK;
                dev_dbg(&pf->pdev->dev, "cleared PE_CRITERR\n");
                set_bit(__I40E_CORE_RESET_REQUESTED, pf->state);
        }

        /* only q0 is used in MSI/Legacy mode, and none are used in MSIX */
        if (icr0 & I40E_PFINT_ICR0_QUEUE_0_MASK) {
                struct i40e_vsi *vsi = i40e_pf_get_main_vsi(pf);
                struct i40e_q_vector *q_vector = vsi->q_vectors[0];

                /* We do not have a way to disarm Queue causes while leaving
                 * interrupt enabled for all other causes, ideally
                 * interrupt should be disabled while we are in NAPI but
                 * this is not a performance path and napi_schedule()
                 * can deal with rescheduling.
                 */
                if (!test_bit(__I40E_DOWN, pf->state))
                        napi_schedule_irqoff(&q_vector->napi);
        }

        if (icr0 & I40E_PFINT_ICR0_ADMINQ_MASK) {
                ena_mask &= ~I40E_PFINT_ICR0_ENA_ADMINQ_MASK;
                set_bit(__I40E_ADMINQ_EVENT_PENDING, pf->state);
                i40e_debug(&pf->hw, I40E_DEBUG_NVM, "AdminQ event\n");
        }

        if (icr0 & I40E_PFINT_ICR0_MAL_DETECT_MASK) {
                ena_mask &= ~I40E_PFINT_ICR0_ENA_MAL_DETECT_MASK;
                set_bit(__I40E_MDD_EVENT_PENDING, pf->state);
        }

        if (icr0 & I40E_PFINT_ICR0_VFLR_MASK) {
                /* disable any further VFLR event notifications */
                if (test_bit(__I40E_VF_RESETS_DISABLED, pf->state)) {
                        u32 reg = rd32(hw, I40E_PFINT_ICR0_ENA);

                        reg &= ~I40E_PFINT_ICR0_VFLR_MASK;
                        wr32(hw, I40E_PFINT_ICR0_ENA, reg);
                } else {
                        ena_mask &= ~I40E_PFINT_ICR0_ENA_VFLR_MASK;
                        set_bit(__I40E_VFLR_EVENT_PENDING, pf->state);
                }
        }

        if (icr0 & I40E_PFINT_ICR0_GRST_MASK) {
                if (!test_bit(__I40E_RESET_RECOVERY_PENDING, pf->state))
                        set_bit(__I40E_RESET_INTR_RECEIVED, pf->state);
                ena_mask &= ~I40E_PFINT_ICR0_ENA_GRST_MASK;
                val = rd32(hw, I40E_GLGEN_RSTAT);
                val = FIELD_GET(I40E_GLGEN_RSTAT_RESET_TYPE_MASK, val);
                if (val == I40E_RESET_CORER) {
                        pf->corer_count++;
                } else if (val == I40E_RESET_GLOBR) {
                        pf->globr_count++;
                } else if (val == I40E_RESET_EMPR) {
                        pf->empr_count++;
                        set_bit(__I40E_EMP_RESET_INTR_RECEIVED, pf->state);
                }
        }

        if (icr0 & I40E_PFINT_ICR0_HMC_ERR_MASK) {
                icr0 &= ~I40E_PFINT_ICR0_HMC_ERR_MASK;
                dev_info(&pf->pdev->dev, "HMC error interrupt\n");
                dev_info(&pf->pdev->dev, "HMC error info 0x%x, HMC error data 0x%x\n",
                         rd32(hw, I40E_PFHMC_ERRORINFO),
                         rd32(hw, I40E_PFHMC_ERRORDATA));
        }

        if (icr0 & I40E_PFINT_ICR0_TIMESYNC_MASK) {
                u32 prttsyn_stat = rd32(hw, I40E_PRTTSYN_STAT_0);

                if (prttsyn_stat & I40E_PRTTSYN_STAT_0_EVENT0_MASK)
                        schedule_work(&pf->ptp_extts0_work);

                if (prttsyn_stat & I40E_PRTTSYN_STAT_0_TXTIME_MASK)
                        i40e_ptp_tx_hwtstamp(pf);

                icr0 &= ~I40E_PFINT_ICR0_ENA_TIMESYNC_MASK;
        }

        /* If a critical error is pending we have no choice but to reset the
         * device.
         * Report and mask out any remaining unexpected interrupts.
         */
        icr0_remaining = icr0 & ena_mask;
        if (icr0_remaining) {
                dev_info(&pf->pdev->dev, "unhandled interrupt icr0=0x%08x\n",
                         icr0_remaining);
                if ((icr0_remaining & I40E_PFINT_ICR0_PE_CRITERR_MASK) ||
                    (icr0_remaining & I40E_PFINT_ICR0_PCI_EXCEPTION_MASK) ||
                    (icr0_remaining & I40E_PFINT_ICR0_ECC_ERR_MASK)) {
                        dev_info(&pf->pdev->dev, "device will be reset\n");
                        set_bit(__I40E_PF_RESET_REQUESTED, pf->state);
                        i40e_service_event_schedule(pf);
                }
                ena_mask &= ~icr0_remaining;
        }
        ret = IRQ_HANDLED;

enable_intr:
        /* re-enable interrupt causes */
        wr32(hw, I40E_PFINT_ICR0_ENA, ena_mask);
        if (!test_bit(__I40E_DOWN, pf->state) ||
            test_bit(__I40E_RECOVERY_MODE, pf->state)) {
                i40e_service_event_schedule(pf);
                i40e_irq_dynamic_enable_icr0(pf);
        }

        return ret;
}

/**
 * i40e_clean_fdir_tx_irq - Reclaim resources after transmit completes
 * @tx_ring:  tx ring to clean
 * @budget:   how many cleans we're allowed
 *
 * Returns true if there's any budget left (e.g. the clean is finished)
 **/
static bool i40e_clean_fdir_tx_irq(struct i40e_ring *tx_ring, int budget)
{
        struct i40e_vsi *vsi = tx_ring->vsi;
        u16 i = tx_ring->next_to_clean;
        struct i40e_tx_buffer *tx_buf;
        struct i40e_tx_desc *tx_desc;

        tx_buf = &tx_ring->tx_bi[i];
        tx_desc = I40E_TX_DESC(tx_ring, i);
        i -= tx_ring->count;

        do {
                struct i40e_tx_desc *eop_desc = tx_buf->next_to_watch;

                /* if next_to_watch is not set then there is no work pending */
                if (!eop_desc)
                        break;

                /* prevent any other reads prior to eop_desc */
                smp_rmb();

                /* if the descriptor isn't done, no work yet to do */
                if (!(eop_desc->cmd_type_offset_bsz &
                      cpu_to_le64(I40E_TX_DESC_DTYPE_DESC_DONE)))
                        break;

                /* clear next_to_watch to prevent false hangs */
                tx_buf->next_to_watch = NULL;

                tx_desc->buffer_addr = 0;
                tx_desc->cmd_type_offset_bsz = 0;
                /* move past filter desc */
                tx_buf++;
                tx_desc++;
                i++;
                if (unlikely(!i)) {
                        i -= tx_ring->count;
                        tx_buf = tx_ring->tx_bi;
                        tx_desc = I40E_TX_DESC(tx_ring, 0);
                }
                /* unmap skb header data */
                dma_unmap_single(tx_ring->dev,
                                 dma_unmap_addr(tx_buf, dma),
                                 dma_unmap_len(tx_buf, len),
                                 DMA_TO_DEVICE);
                if (tx_buf->tx_flags & I40E_TX_FLAGS_FD_SB)
                        kfree(tx_buf->raw_buf);

                tx_buf->raw_buf = NULL;
                tx_buf->tx_flags = 0;
                tx_buf->next_to_watch = NULL;
                dma_unmap_len_set(tx_buf, len, 0);
                tx_desc->buffer_addr = 0;
                tx_desc->cmd_type_offset_bsz = 0;

                /* move us past the eop_desc for start of next FD desc */
                tx_buf++;
                tx_desc++;
                i++;
                if (unlikely(!i)) {
                        i -= tx_ring->count;
                        tx_buf = tx_ring->tx_bi;
                        tx_desc = I40E_TX_DESC(tx_ring, 0);
                }

                /* update budget accounting */
                budget--;
        } while (likely(budget));

        i += tx_ring->count;
        tx_ring->next_to_clean = i;

        if (test_bit(I40E_FLAG_MSIX_ENA, vsi->back->flags))
                i40e_irq_dynamic_enable(vsi, tx_ring->q_vector->v_idx);

        return budget > 0;
}

/**
 * i40e_fdir_clean_ring - Interrupt Handler for FDIR SB ring
 * @irq: interrupt number
 * @data: pointer to a q_vector
 **/
static irqreturn_t i40e_fdir_clean_ring(int irq, void *data)
{
        struct i40e_q_vector *q_vector = data;
        struct i40e_vsi *vsi;

        if (!q_vector->tx.ring)
                return IRQ_HANDLED;

        vsi = q_vector->tx.ring->vsi;
        i40e_clean_fdir_tx_irq(q_vector->tx.ring, vsi->work_limit);

        return IRQ_HANDLED;
}

/**
 * i40e_map_vector_to_qp - Assigns the queue pair to the vector
 * @vsi: the VSI being configured
 * @v_idx: vector index
 * @qp_idx: queue pair index
 **/
static void i40e_map_vector_to_qp(struct i40e_vsi *vsi, int v_idx, int qp_idx)
{
        struct i40e_q_vector *q_vector = vsi->q_vectors[v_idx];
        struct i40e_ring *tx_ring = vsi->tx_rings[qp_idx];
        struct i40e_ring *rx_ring = vsi->rx_rings[qp_idx];

        tx_ring->q_vector = q_vector;
        tx_ring->next = q_vector->tx.ring;
        q_vector->tx.ring = tx_ring;
        q_vector->tx.count++;

        /* Place XDP Tx ring in the same q_vector ring list as regular Tx */
        if (i40e_enabled_xdp_vsi(vsi)) {
                struct i40e_ring *xdp_ring = vsi->xdp_rings[qp_idx];

                xdp_ring->q_vector = q_vector;
                xdp_ring->next = q_vector->tx.ring;
                q_vector->tx.ring = xdp_ring;
                q_vector->tx.count++;
        }

        rx_ring->q_vector = q_vector;
        rx_ring->next = q_vector->rx.ring;
        q_vector->rx.ring = rx_ring;
        q_vector->rx.count++;
}

/**
 * i40e_vsi_map_rings_to_vectors - Maps descriptor rings to vectors
 * @vsi: the VSI being configured
 *
 * This function maps descriptor rings to the queue-specific vectors
 * we were allotted through the MSI-X enabling code.  Ideally, we'd have
 * one vector per queue pair, but on a constrained vector budget, we
 * group the queue pairs as "efficiently" as possible.
 **/
static void i40e_vsi_map_rings_to_vectors(struct i40e_vsi *vsi)
{
        int qp_remaining = vsi->num_queue_pairs;
        int q_vectors = vsi->num_q_vectors;
        int num_ringpairs;
        int v_start = 0;
        int qp_idx = 0;

        /* If we don't have enough vectors for a 1-to-1 mapping, we'll have to
         * group them so there are multiple queues per vector.
         * It is also important to go through all the vectors available to be
         * sure that if we don't use all the vectors, that the remaining vectors
         * are cleared. This is especially important when decreasing the
         * number of queues in use.
         */
        for (; v_start < q_vectors; v_start++) {
                struct i40e_q_vector *q_vector = vsi->q_vectors[v_start];

                num_ringpairs = DIV_ROUND_UP(qp_remaining, q_vectors - v_start);

                q_vector->num_ringpairs = num_ringpairs;
                q_vector->reg_idx = q_vector->v_idx + vsi->base_vector - 1;

                q_vector->rx.count = 0;
                q_vector->tx.count = 0;
                q_vector->rx.ring = NULL;
                q_vector->tx.ring = NULL;

                while (num_ringpairs--) {
                        i40e_map_vector_to_qp(vsi, v_start, qp_idx);
                        qp_idx++;
                        qp_remaining--;
                }
        }
}

/**
 * i40e_vsi_request_irq - Request IRQ from the OS
 * @vsi: the VSI being configured
 * @basename: name for the vector
 **/
static int i40e_vsi_request_irq(struct i40e_vsi *vsi, char *basename)
{
        struct i40e_pf *pf = vsi->back;
        int err;

        if (test_bit(I40E_FLAG_MSIX_ENA, pf->flags))
                err = i40e_vsi_request_irq_msix(vsi, basename);
        else if (test_bit(I40E_FLAG_MSI_ENA, pf->flags))
                err = request_irq(pf->pdev->irq, i40e_intr, 0,
                                  pf->int_name, pf);
        else
                err = request_irq(pf->pdev->irq, i40e_intr, IRQF_SHARED,
                                  pf->int_name, pf);

        if (err)
                dev_info(&pf->pdev->dev, "request_irq failed, Error %d\n", err);

        return err;
}

#ifdef CONFIG_NET_POLL_CONTROLLER
/**
 * i40e_netpoll - A Polling 'interrupt' handler
 * @netdev: network interface device structure
 *
 * This is used by netconsole to send skbs without having to re-enable
 * interrupts.  It's not called while the normal interrupt routine is executing.
 **/
static void i40e_netpoll(struct net_device *netdev)
{
        struct i40e_netdev_priv *np = netdev_priv(netdev);
        struct i40e_vsi *vsi = np->vsi;
        struct i40e_pf *pf = vsi->back;
        int i;

        /* if interface is down do nothing */
        if (test_bit(__I40E_VSI_DOWN, vsi->state))
                return;

        if (test_bit(I40E_FLAG_MSIX_ENA, pf->flags)) {
                for (i = 0; i < vsi->num_q_vectors; i++)
                        i40e_msix_clean_rings(0, vsi->q_vectors[i]);
        } else {
                i40e_intr(pf->pdev->irq, netdev);
        }
}
#endif

#define I40E_QTX_ENA_WAIT_COUNT 50

/**
 * i40e_pf_txq_wait - Wait for a PF's Tx queue to be enabled or disabled
 * @pf: the PF being configured
 * @pf_q: the PF queue
 * @enable: enable or disable state of the queue
 *
 * This routine will wait for the given Tx queue of the PF to reach the
 * enabled or disabled state.
 * Returns -ETIMEDOUT in case of failing to reach the requested state after
 * multiple retries; else will return 0 in case of success.
 **/
static int i40e_pf_txq_wait(struct i40e_pf *pf, int pf_q, bool enable)
{
        int i;
        u32 tx_reg;

        for (i = 0; i < I40E_QUEUE_WAIT_RETRY_LIMIT; i++) {
                tx_reg = rd32(&pf->hw, I40E_QTX_ENA(pf_q));
                if (enable == !!(tx_reg & I40E_QTX_ENA_QENA_STAT_MASK))
                        break;

                usleep_range(10, 20);
        }
        if (i >= I40E_QUEUE_WAIT_RETRY_LIMIT)
                return -ETIMEDOUT;

        return 0;
}

/**
 * i40e_control_tx_q - Start or stop a particular Tx queue
 * @pf: the PF structure
 * @pf_q: the PF queue to configure
 * @enable: start or stop the queue
 *
 * This function enables or disables a single queue. Note that any delay
 * required after the operation is expected to be handled by the caller of
 * this function.
 **/
static void i40e_control_tx_q(struct i40e_pf *pf, int pf_q, bool enable)
{
        struct i40e_hw *hw = &pf->hw;
        u32 tx_reg;
        int i;

        /* warn the TX unit of coming changes */
        i40e_pre_tx_queue_cfg(&pf->hw, pf_q, enable);
        if (!enable)
                usleep_range(10, 20);

        for (i = 0; i < I40E_QTX_ENA_WAIT_COUNT; i++) {
                tx_reg = rd32(hw, I40E_QTX_ENA(pf_q));
                if (((tx_reg >> I40E_QTX_ENA_QENA_REQ_SHIFT) & 1) ==
                    ((tx_reg >> I40E_QTX_ENA_QENA_STAT_SHIFT) & 1))
                        break;
                usleep_range(1000, 2000);
        }

        /* Skip if the queue is already in the requested state */
        if (enable == !!(tx_reg & I40E_QTX_ENA_QENA_STAT_MASK))
                return;

        /* turn on/off the queue */
        if (enable) {
                wr32(hw, I40E_QTX_HEAD(pf_q), 0);
                tx_reg |= I40E_QTX_ENA_QENA_REQ_MASK;
        } else {
                tx_reg &= ~I40E_QTX_ENA_QENA_REQ_MASK;
        }

        wr32(hw, I40E_QTX_ENA(pf_q), tx_reg);
}

/**
 * i40e_control_wait_tx_q - Start/stop Tx queue and wait for completion
 * @seid: VSI SEID
 * @pf: the PF structure
 * @pf_q: the PF queue to configure
 * @is_xdp: true if the queue is used for XDP
 * @enable: start or stop the queue
 **/
int i40e_control_wait_tx_q(int seid, struct i40e_pf *pf, int pf_q,
                           bool is_xdp, bool enable)
{
        int ret;

        i40e_control_tx_q(pf, pf_q, enable);

        /* wait for the change to finish */
        ret = i40e_pf_txq_wait(pf, pf_q, enable);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "VSI seid %d %sTx ring %d %sable timeout\n",
                         seid, (is_xdp ? "XDP " : ""), pf_q,
                         (enable ? "en" : "dis"));
        }

        return ret;
}

/**
 * i40e_vsi_enable_tx - Start a VSI's rings
 * @vsi: the VSI being configured
 **/
static int i40e_vsi_enable_tx(struct i40e_vsi *vsi)
{
        struct i40e_pf *pf = vsi->back;
        int i, pf_q, ret = 0;

        pf_q = vsi->base_queue;
        for (i = 0; i < vsi->num_queue_pairs; i++, pf_q++) {
                ret = i40e_control_wait_tx_q(vsi->seid, pf,
                                             pf_q,
                                             false /*is xdp*/, true);
                if (ret)
                        break;

                if (!i40e_enabled_xdp_vsi(vsi))
                        continue;

                ret = i40e_control_wait_tx_q(vsi->seid, pf,
                                             pf_q + vsi->alloc_queue_pairs,
                                             true /*is xdp*/, true);
                if (ret)
                        break;
        }
        return ret;
}

/**
 * i40e_pf_rxq_wait - Wait for a PF's Rx queue to be enabled or disabled
 * @pf: the PF being configured
 * @pf_q: the PF queue
 * @enable: enable or disable state of the queue
 *
 * This routine will wait for the given Rx queue of the PF to reach the
 * enabled or disabled state.
 * Returns -ETIMEDOUT in case of failing to reach the requested state after
 * multiple retries; else will return 0 in case of success.
 **/
static int i40e_pf_rxq_wait(struct i40e_pf *pf, int pf_q, bool enable)
{
        int i;
        u32 rx_reg;

        for (i = 0; i < I40E_QUEUE_WAIT_RETRY_LIMIT; i++) {
                rx_reg = rd32(&pf->hw, I40E_QRX_ENA(pf_q));
                if (enable == !!(rx_reg & I40E_QRX_ENA_QENA_STAT_MASK))
                        break;

                usleep_range(10, 20);
        }
        if (i >= I40E_QUEUE_WAIT_RETRY_LIMIT)
                return -ETIMEDOUT;

        return 0;
}

/**
 * i40e_control_rx_q - Start or stop a particular Rx queue
 * @pf: the PF structure
 * @pf_q: the PF queue to configure
 * @enable: start or stop the queue
 *
 * This function enables or disables a single queue. Note that
 * any delay required after the operation is expected to be
 * handled by the caller of this function.
 **/
static void i40e_control_rx_q(struct i40e_pf *pf, int pf_q, bool enable)
{
        struct i40e_hw *hw = &pf->hw;
        u32 rx_reg;
        int i;

        for (i = 0; i < I40E_QTX_ENA_WAIT_COUNT; i++) {
                rx_reg = rd32(hw, I40E_QRX_ENA(pf_q));
                if (((rx_reg >> I40E_QRX_ENA_QENA_REQ_SHIFT) & 1) ==
                    ((rx_reg >> I40E_QRX_ENA_QENA_STAT_SHIFT) & 1))
                        break;
                usleep_range(1000, 2000);
        }

        /* Skip if the queue is already in the requested state */
        if (enable == !!(rx_reg & I40E_QRX_ENA_QENA_STAT_MASK))
                return;

        /* turn on/off the queue */
        if (enable)
                rx_reg |= I40E_QRX_ENA_QENA_REQ_MASK;
        else
                rx_reg &= ~I40E_QRX_ENA_QENA_REQ_MASK;

        wr32(hw, I40E_QRX_ENA(pf_q), rx_reg);
}

/**
 * i40e_control_wait_rx_q
 * @pf: the PF structure
 * @pf_q: queue being configured
 * @enable: start or stop the rings
 *
 * This function enables or disables a single queue along with waiting
 * for the change to finish. The caller of this function should handle
 * the delays needed in the case of disabling queues.
 **/
int i40e_control_wait_rx_q(struct i40e_pf *pf, int pf_q, bool enable)
{
        int ret = 0;

        i40e_control_rx_q(pf, pf_q, enable);

        /* wait for the change to finish */
        ret = i40e_pf_rxq_wait(pf, pf_q, enable);
        if (ret)
                return ret;

        return ret;
}

/**
 * i40e_vsi_enable_rx - Start a VSI's rings
 * @vsi: the VSI being configured
 **/
static int i40e_vsi_enable_rx(struct i40e_vsi *vsi)
{
        struct i40e_pf *pf = vsi->back;
        int i, pf_q, ret = 0;

        pf_q = vsi->base_queue;
        for (i = 0; i < vsi->num_queue_pairs; i++, pf_q++) {
                ret = i40e_control_wait_rx_q(pf, pf_q, true);
                if (ret) {
                        dev_info(&pf->pdev->dev,
                                 "VSI seid %d Rx ring %d enable timeout\n",
                                 vsi->seid, pf_q);
                        break;
                }
        }

        return ret;
}

/**
 * i40e_vsi_start_rings - Start a VSI's rings
 * @vsi: the VSI being configured
 **/
int i40e_vsi_start_rings(struct i40e_vsi *vsi)
{
        int ret = 0;

        /* do rx first for enable and last for disable */
        ret = i40e_vsi_enable_rx(vsi);
        if (ret)
                return ret;
        ret = i40e_vsi_enable_tx(vsi);

        return ret;
}

#define I40E_DISABLE_TX_GAP_MSEC        50

/**
 * i40e_vsi_stop_rings - Stop a VSI's rings
 * @vsi: the VSI being configured
 **/
void i40e_vsi_stop_rings(struct i40e_vsi *vsi)
{
        struct i40e_pf *pf = vsi->back;
        u32 pf_q, tx_q_end, rx_q_end;

        /* When port TX is suspended, don't wait */
        if (test_bit(__I40E_PORT_SUSPENDED, vsi->back->state))
                return i40e_vsi_stop_rings_no_wait(vsi);

        tx_q_end = vsi->base_queue +
                vsi->alloc_queue_pairs * (i40e_enabled_xdp_vsi(vsi) ? 2 : 1);
        for (pf_q = vsi->base_queue; pf_q < tx_q_end; pf_q++)
                i40e_pre_tx_queue_cfg(&pf->hw, pf_q, false);

        rx_q_end = vsi->base_queue + vsi->num_queue_pairs;
        for (pf_q = vsi->base_queue; pf_q < rx_q_end; pf_q++)
                i40e_control_rx_q(pf, pf_q, false);

        msleep(I40E_DISABLE_TX_GAP_MSEC);
        for (pf_q = vsi->base_queue; pf_q < tx_q_end; pf_q++)
                wr32(&pf->hw, I40E_QTX_ENA(pf_q), 0);

        i40e_vsi_wait_queues_disabled(vsi);
}

/**
 * i40e_vsi_stop_rings_no_wait - Stop a VSI's rings and do not delay
 * @vsi: the VSI being shutdown
 *
 * This function stops all the rings for a VSI but does not delay to verify
 * that rings have been disabled. It is expected that the caller is shutting
 * down multiple VSIs at once and will delay together for all the VSIs after
 * initiating the shutdown. This is particularly useful for shutting down lots
 * of VFs together. Otherwise, a large delay can be incurred while configuring
 * each VSI in serial.
 **/
void i40e_vsi_stop_rings_no_wait(struct i40e_vsi *vsi)
{
        struct i40e_pf *pf = vsi->back;
        int i, pf_q;

        pf_q = vsi->base_queue;
        for (i = 0; i < vsi->num_queue_pairs; i++, pf_q++) {
                i40e_control_tx_q(pf, pf_q, false);
                i40e_control_rx_q(pf, pf_q, false);
        }
}

/**
 * i40e_vsi_free_irq - Free the irq association with the OS
 * @vsi: the VSI being configured
 **/
static void i40e_vsi_free_irq(struct i40e_vsi *vsi)
{
        struct i40e_pf *pf = vsi->back;
        struct i40e_hw *hw = &pf->hw;
        int base = vsi->base_vector;
        u32 val, qp;
        int i;

        if (test_bit(I40E_FLAG_MSIX_ENA, pf->flags)) {
                if (!vsi->q_vectors)
                        return;

                if (!vsi->irqs_ready)
                        return;

                vsi->irqs_ready = false;
                for (i = 0; i < vsi->num_q_vectors; i++) {
                        int irq_num;
                        u16 vector;

                        vector = i + base;
                        irq_num = pf->msix_entries[vector].vector;

                        /* free only the irqs that were actually requested */
                        if (!vsi->q_vectors[i] ||
                            !vsi->q_vectors[i]->num_ringpairs)
                                continue;

                        /* clear the affinity notifier in the IRQ descriptor */
                        irq_set_affinity_notifier(irq_num, NULL);
                        /* remove our suggested affinity mask for this IRQ */
                        irq_update_affinity_hint(irq_num, NULL);
                        free_irq(irq_num, vsi->q_vectors[i]);

                        /* Tear down the interrupt queue link list
                         *
                         * We know that they come in pairs and always
                         * the Rx first, then the Tx.  To clear the
                         * link list, stick the EOL value into the
                         * next_q field of the registers.
                         */
                        val = rd32(hw, I40E_PFINT_LNKLSTN(vector - 1));
                        qp = FIELD_GET(I40E_PFINT_LNKLSTN_FIRSTQ_INDX_MASK,
                                       val);
                        val |= I40E_QUEUE_END_OF_LIST
                                << I40E_PFINT_LNKLSTN_FIRSTQ_INDX_SHIFT;
                        wr32(hw, I40E_PFINT_LNKLSTN(vector - 1), val);

                        while (qp != I40E_QUEUE_END_OF_LIST) {
                                u32 next;

                                val = rd32(hw, I40E_QINT_RQCTL(qp));

                                val &= ~(I40E_QINT_RQCTL_MSIX_INDX_MASK  |
                                         I40E_QINT_RQCTL_MSIX0_INDX_MASK |
                                         I40E_QINT_RQCTL_CAUSE_ENA_MASK  |
                                         I40E_QINT_RQCTL_INTEVENT_MASK);

                                val |= (I40E_QINT_RQCTL_ITR_INDX_MASK |
                                         I40E_QINT_RQCTL_NEXTQ_INDX_MASK);

                                wr32(hw, I40E_QINT_RQCTL(qp), val);

                                val = rd32(hw, I40E_QINT_TQCTL(qp));

                                next = FIELD_GET(I40E_QINT_TQCTL_NEXTQ_INDX_MASK,
                                                 val);

                                val &= ~(I40E_QINT_TQCTL_MSIX_INDX_MASK  |
                                         I40E_QINT_TQCTL_MSIX0_INDX_MASK |
                                         I40E_QINT_TQCTL_CAUSE_ENA_MASK  |
                                         I40E_QINT_TQCTL_INTEVENT_MASK);

                                val |= (I40E_QINT_TQCTL_ITR_INDX_MASK |
                                         I40E_QINT_TQCTL_NEXTQ_INDX_MASK);

                                wr32(hw, I40E_QINT_TQCTL(qp), val);
                                qp = next;
                        }
                }
        } else {
                free_irq(pf->pdev->irq, pf);

                val = rd32(hw, I40E_PFINT_LNKLST0);
                qp = FIELD_GET(I40E_PFINT_LNKLSTN_FIRSTQ_INDX_MASK, val);
                val |= I40E_QUEUE_END_OF_LIST
                        << I40E_PFINT_LNKLST0_FIRSTQ_INDX_SHIFT;
                wr32(hw, I40E_PFINT_LNKLST0, val);

                val = rd32(hw, I40E_QINT_RQCTL(qp));
                val &= ~(I40E_QINT_RQCTL_MSIX_INDX_MASK  |
                         I40E_QINT_RQCTL_MSIX0_INDX_MASK |
                         I40E_QINT_RQCTL_CAUSE_ENA_MASK  |
                         I40E_QINT_RQCTL_INTEVENT_MASK);

                val |= (I40E_QINT_RQCTL_ITR_INDX_MASK |
                        I40E_QINT_RQCTL_NEXTQ_INDX_MASK);

                wr32(hw, I40E_QINT_RQCTL(qp), val);

                val = rd32(hw, I40E_QINT_TQCTL(qp));

                val &= ~(I40E_QINT_TQCTL_MSIX_INDX_MASK  |
                         I40E_QINT_TQCTL_MSIX0_INDX_MASK |
                         I40E_QINT_TQCTL_CAUSE_ENA_MASK  |
                         I40E_QINT_TQCTL_INTEVENT_MASK);

                val |= (I40E_QINT_TQCTL_ITR_INDX_MASK |
                        I40E_QINT_TQCTL_NEXTQ_INDX_MASK);

                wr32(hw, I40E_QINT_TQCTL(qp), val);
        }
}

/**
 * i40e_free_q_vector - Free memory allocated for specific interrupt vector
 * @vsi: the VSI being configured
 * @v_idx: Index of vector to be freed
 *
 * This function frees the memory allocated to the q_vector.  In addition if
 * NAPI is enabled it will delete any references to the NAPI struct prior
 * to freeing the q_vector.
 **/
static void i40e_free_q_vector(struct i40e_vsi *vsi, int v_idx)
{
        struct i40e_q_vector *q_vector = vsi->q_vectors[v_idx];
        struct i40e_ring *ring;

        if (!q_vector)
                return;

        /* disassociate q_vector from rings */
        i40e_for_each_ring(ring, q_vector->tx)
                ring->q_vector = NULL;

        i40e_for_each_ring(ring, q_vector->rx)
                ring->q_vector = NULL;

        /* only VSI w/ an associated netdev is set up w/ NAPI */
        if (vsi->netdev)
                netif_napi_del(&q_vector->napi);

        vsi->q_vectors[v_idx] = NULL;

        kfree_rcu(q_vector, rcu);
}

/**
 * i40e_vsi_free_q_vectors - Free memory allocated for interrupt vectors
 * @vsi: the VSI being un-configured
 *
 * This frees the memory allocated to the q_vectors and
 * deletes references to the NAPI struct.
 **/
static void i40e_vsi_free_q_vectors(struct i40e_vsi *vsi)
{
        int v_idx;

        for (v_idx = 0; v_idx < vsi->num_q_vectors; v_idx++)
                i40e_free_q_vector(vsi, v_idx);
}

/**
 * i40e_reset_interrupt_capability - Disable interrupt setup in OS
 * @pf: board private structure
 **/
static void i40e_reset_interrupt_capability(struct i40e_pf *pf)
{
        /* If we're in Legacy mode, the interrupt was cleaned in vsi_close */
        if (test_bit(I40E_FLAG_MSIX_ENA, pf->flags)) {
                pci_disable_msix(pf->pdev);
                kfree(pf->msix_entries);
                pf->msix_entries = NULL;
                kfree(pf->irq_pile);
                pf->irq_pile = NULL;
        } else if (test_bit(I40E_FLAG_MSI_ENA, pf->flags)) {
                pci_disable_msi(pf->pdev);
        }
        clear_bit(I40E_FLAG_MSI_ENA, pf->flags);
        clear_bit(I40E_FLAG_MSIX_ENA, pf->flags);
}

/**
 * i40e_clear_interrupt_scheme - Clear the current interrupt scheme settings
 * @pf: board private structure
 *
 * We go through and clear interrupt specific resources and reset the structure
 * to pre-load conditions
 **/
static void i40e_clear_interrupt_scheme(struct i40e_pf *pf)
{
        struct i40e_vsi *vsi;
        int i;

        if (test_bit(__I40E_MISC_IRQ_REQUESTED, pf->state))
                i40e_free_misc_vector(pf);

        i40e_put_lump(pf->irq_pile, pf->iwarp_base_vector,
                      I40E_IWARP_IRQ_PILE_ID);

        i40e_put_lump(pf->irq_pile, 0, I40E_PILE_VALID_BIT-1);

        i40e_pf_for_each_vsi(pf, i, vsi)
                i40e_vsi_free_q_vectors(vsi);

        i40e_reset_interrupt_capability(pf);
}

/**
 * i40e_napi_enable_all - Enable NAPI for all q_vectors in the VSI
 * @vsi: the VSI being configured
 **/
static void i40e_napi_enable_all(struct i40e_vsi *vsi)
{
        int q_idx;

        if (!vsi->netdev)
                return;

        for (q_idx = 0; q_idx < vsi->num_q_vectors; q_idx++) {
                struct i40e_q_vector *q_vector = vsi->q_vectors[q_idx];

                if (q_vector->rx.ring || q_vector->tx.ring)
                        napi_enable(&q_vector->napi);
        }
}

/**
 * i40e_napi_disable_all - Disable NAPI for all q_vectors in the VSI
 * @vsi: the VSI being configured
 **/
static void i40e_napi_disable_all(struct i40e_vsi *vsi)
{
        int q_idx;

        if (!vsi->netdev)
                return;

        for (q_idx = 0; q_idx < vsi->num_q_vectors; q_idx++) {
                struct i40e_q_vector *q_vector = vsi->q_vectors[q_idx];

                if (q_vector->rx.ring || q_vector->tx.ring)
                        napi_disable(&q_vector->napi);
        }
}

/**
 * i40e_vsi_close - Shut down a VSI
 * @vsi: the vsi to be quelled
 **/
static void i40e_vsi_close(struct i40e_vsi *vsi)
{
        struct i40e_pf *pf = vsi->back;
        if (!test_and_set_bit(__I40E_VSI_DOWN, vsi->state))
                i40e_down(vsi);
        i40e_vsi_free_irq(vsi);
        i40e_vsi_free_tx_resources(vsi);
        i40e_vsi_free_rx_resources(vsi);
        vsi->current_netdev_flags = 0;
        set_bit(__I40E_CLIENT_SERVICE_REQUESTED, pf->state);
        if (test_bit(__I40E_RESET_RECOVERY_PENDING, pf->state))
                set_bit(__I40E_CLIENT_RESET, pf->state);
}

/**
 * i40e_quiesce_vsi - Pause a given VSI
 * @vsi: the VSI being paused
 **/
static void i40e_quiesce_vsi(struct i40e_vsi *vsi)
{
        if (test_bit(__I40E_VSI_DOWN, vsi->state))
                return;

        set_bit(__I40E_VSI_NEEDS_RESTART, vsi->state);
        if (vsi->netdev && netif_running(vsi->netdev))
                vsi->netdev->netdev_ops->ndo_stop(vsi->netdev);
        else
                i40e_vsi_close(vsi);
}

/**
 * i40e_unquiesce_vsi - Resume a given VSI
 * @vsi: the VSI being resumed
 **/
static void i40e_unquiesce_vsi(struct i40e_vsi *vsi)
{
        if (!test_and_clear_bit(__I40E_VSI_NEEDS_RESTART, vsi->state))
                return;

        if (vsi->netdev && netif_running(vsi->netdev))
                vsi->netdev->netdev_ops->ndo_open(vsi->netdev);
        else
                i40e_vsi_open(vsi);   /* this clears the DOWN bit */
}

/**
 * i40e_pf_quiesce_all_vsi - Pause all VSIs on a PF
 * @pf: the PF
 **/
static void i40e_pf_quiesce_all_vsi(struct i40e_pf *pf)
{
        struct i40e_vsi *vsi;
        int v;

        i40e_pf_for_each_vsi(pf, v, vsi)
                i40e_quiesce_vsi(vsi);
}

/**
 * i40e_pf_unquiesce_all_vsi - Resume all VSIs on a PF
 * @pf: the PF
 **/
static void i40e_pf_unquiesce_all_vsi(struct i40e_pf *pf)
{
        struct i40e_vsi *vsi;
        int v;

        i40e_pf_for_each_vsi(pf, v, vsi)
                i40e_unquiesce_vsi(vsi);
}

/**
 * i40e_vsi_wait_queues_disabled - Wait for VSI's queues to be disabled
 * @vsi: the VSI being configured
 *
 * Wait until all queues on a given VSI have been disabled.
 **/
int i40e_vsi_wait_queues_disabled(struct i40e_vsi *vsi)
{
        struct i40e_pf *pf = vsi->back;
        int i, pf_q, ret;

        pf_q = vsi->base_queue;
        for (i = 0; i < vsi->num_queue_pairs; i++, pf_q++) {
                /* Check and wait for the Tx queue */
                ret = i40e_pf_txq_wait(pf, pf_q, false);
                if (ret) {
                        dev_info(&pf->pdev->dev,
                                 "VSI seid %d Tx ring %d disable timeout\n",
                                 vsi->seid, pf_q);
                        return ret;
                }

                if (!i40e_enabled_xdp_vsi(vsi))
                        goto wait_rx;

                /* Check and wait for the XDP Tx queue */
                ret = i40e_pf_txq_wait(pf, pf_q + vsi->alloc_queue_pairs,
                                       false);
                if (ret) {
                        dev_info(&pf->pdev->dev,
                                 "VSI seid %d XDP Tx ring %d disable timeout\n",
                                 vsi->seid, pf_q);
                        return ret;
                }
wait_rx:
                /* Check and wait for the Rx queue */
                ret = i40e_pf_rxq_wait(pf, pf_q, false);
                if (ret) {
                        dev_info(&pf->pdev->dev,
                                 "VSI seid %d Rx ring %d disable timeout\n",
                                 vsi->seid, pf_q);
                        return ret;
                }
        }

        return 0;
}

#ifdef CONFIG_I40E_DCB
/**
 * i40e_pf_wait_queues_disabled - Wait for all queues of PF VSIs to be disabled
 * @pf: the PF
 *
 * This function waits for the queues to be in disabled state for all the
 * VSIs that are managed by this PF.
 **/
static int i40e_pf_wait_queues_disabled(struct i40e_pf *pf)
{
        struct i40e_vsi *vsi;
        int v, ret = 0;

        i40e_pf_for_each_vsi(pf, v, vsi) {
                ret = i40e_vsi_wait_queues_disabled(vsi);
                if (ret)
                        break;
        }

        return ret;
}

#endif

/**
 * i40e_get_iscsi_tc_map - Return TC map for iSCSI APP
 * @pf: pointer to PF
 *
 * Get TC map for ISCSI PF type that will include iSCSI TC
 * and LAN TC.
 **/
static u8 i40e_get_iscsi_tc_map(struct i40e_pf *pf)
{
        struct i40e_dcb_app_priority_table app;
        struct i40e_hw *hw = &pf->hw;
        u8 enabled_tc = 1; /* TC0 is always enabled */
        u8 tc, i;
        /* Get the iSCSI APP TLV */
        struct i40e_dcbx_config *dcbcfg = &hw->local_dcbx_config;

        for (i = 0; i < dcbcfg->numapps; i++) {
                app = dcbcfg->app[i];
                if (app.selector == I40E_APP_SEL_TCPIP &&
                    app.protocolid == I40E_APP_PROTOID_ISCSI) {
                        tc = dcbcfg->etscfg.prioritytable[app.priority];
                        enabled_tc |= BIT(tc);
                        break;
                }
        }

        return enabled_tc;
}

/**
 * i40e_dcb_get_num_tc -  Get the number of TCs from DCBx config
 * @dcbcfg: the corresponding DCBx configuration structure
 *
 * Return the number of TCs from given DCBx configuration
 **/
static u8 i40e_dcb_get_num_tc(struct i40e_dcbx_config *dcbcfg)
{
        int i, tc_unused = 0;
        u8 num_tc = 0;
        u8 ret = 0;

        /* Scan the ETS Config Priority Table to find
         * traffic class enabled for a given priority
         * and create a bitmask of enabled TCs
         */
        for (i = 0; i < I40E_MAX_USER_PRIORITY; i++)
                num_tc |= BIT(dcbcfg->etscfg.prioritytable[i]);

        /* Now scan the bitmask to check for
         * contiguous TCs starting with TC0
         */
        for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
                if (num_tc & BIT(i)) {
                        if (!tc_unused) {
                                ret++;
                        } else {
                                pr_err("Non-contiguous TC - Disabling DCB\n");
                                return 1;
                        }
                } else {
                        tc_unused = 1;
                }
        }

        /* There is always at least TC0 */
        if (!ret)
                ret = 1;

        return ret;
}

/**
 * i40e_dcb_get_enabled_tc - Get enabled traffic classes
 * @dcbcfg: the corresponding DCBx configuration structure
 *
 * Query the current DCB configuration and return the number of
 * traffic classes enabled from the given DCBX config
 **/
static u8 i40e_dcb_get_enabled_tc(struct i40e_dcbx_config *dcbcfg)
{
        u8 num_tc = i40e_dcb_get_num_tc(dcbcfg);
        u8 enabled_tc = 1;
        u8 i;

        for (i = 0; i < num_tc; i++)
                enabled_tc |= BIT(i);

        return enabled_tc;
}

/**
 * i40e_mqprio_get_enabled_tc - Get enabled traffic classes
 * @pf: PF being queried
 *
 * Query the current MQPRIO configuration and return the number of
 * traffic classes enabled.
 **/
static u8 i40e_mqprio_get_enabled_tc(struct i40e_pf *pf)
{
        struct i40e_vsi *vsi = i40e_pf_get_main_vsi(pf);
        u8 num_tc = vsi->mqprio_qopt.qopt.num_tc;
        u8 enabled_tc = 1, i;

        for (i = 1; i < num_tc; i++)
                enabled_tc |= BIT(i);
        return enabled_tc;
}

/**
 * i40e_pf_get_num_tc - Get enabled traffic classes for PF
 * @pf: PF being queried
 *
 * Return number of traffic classes enabled for the given PF
 **/
static u8 i40e_pf_get_num_tc(struct i40e_pf *pf)
{
        u8 i, enabled_tc = 1;
        u8 num_tc = 0;

        if (i40e_is_tc_mqprio_enabled(pf)) {
                struct i40e_vsi *vsi = i40e_pf_get_main_vsi(pf);

                return vsi->mqprio_qopt.qopt.num_tc;
        }

        /* If neither MQPRIO nor DCB is enabled, then always use single TC */
        if (!test_bit(I40E_FLAG_DCB_ENA, pf->flags))
                return 1;

        /* SFP mode will be enabled for all TCs on port */
        if (!test_bit(I40E_FLAG_MFP_ENA, pf->flags))
                return i40e_dcb_get_num_tc(&pf->hw.local_dcbx_config);

        /* MFP mode return count of enabled TCs for this PF */
        if (pf->hw.func_caps.iscsi)
                enabled_tc =  i40e_get_iscsi_tc_map(pf);
        else
                return 1; /* Only TC0 */

        for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
                if (enabled_tc & BIT(i))
                        num_tc++;
        }
        return num_tc;
}

/**
 * i40e_pf_get_tc_map - Get bitmap for enabled traffic classes
 * @pf: PF being queried
 *
 * Return a bitmap for enabled traffic classes for this PF.
 **/
static u8 i40e_pf_get_tc_map(struct i40e_pf *pf)
{
        if (i40e_is_tc_mqprio_enabled(pf))
                return i40e_mqprio_get_enabled_tc(pf);

        /* If neither MQPRIO nor DCB is enabled for this PF then just return
         * default TC
         */
        if (!test_bit(I40E_FLAG_DCB_ENA, pf->flags))
                return I40E_DEFAULT_TRAFFIC_CLASS;

        /* SFP mode we want PF to be enabled for all TCs */
        if (!test_bit(I40E_FLAG_MFP_ENA, pf->flags))
                return i40e_dcb_get_enabled_tc(&pf->hw.local_dcbx_config);

        /* MFP enabled and iSCSI PF type */
        if (pf->hw.func_caps.iscsi)
                return i40e_get_iscsi_tc_map(pf);
        else
                return I40E_DEFAULT_TRAFFIC_CLASS;
}

/**
 * i40e_vsi_get_bw_info - Query VSI BW Information
 * @vsi: the VSI being queried
 *
 * Returns 0 on success, negative value on failure
 **/
static int i40e_vsi_get_bw_info(struct i40e_vsi *vsi)
{
        struct i40e_aqc_query_vsi_ets_sla_config_resp bw_ets_config = {0};
        struct i40e_aqc_query_vsi_bw_config_resp bw_config = {0};
        struct i40e_pf *pf = vsi->back;
        struct i40e_hw *hw = &pf->hw;
        u32 tc_bw_max;
        int ret;
        int i;

        /* Get the VSI level BW configuration */
        ret = i40e_aq_query_vsi_bw_config(hw, vsi->seid, &bw_config, NULL);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "couldn't get PF vsi bw config, err %pe aq_err %s\n",
                         ERR_PTR(ret),
                         i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
                return -EINVAL;
        }

        /* Get the VSI level BW configuration per TC */
        ret = i40e_aq_query_vsi_ets_sla_config(hw, vsi->seid, &bw_ets_config,
                                               NULL);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "couldn't get PF vsi ets bw config, err %pe aq_err %s\n",
                         ERR_PTR(ret),
                         i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
                return -EINVAL;
        }

        if (bw_config.tc_valid_bits != bw_ets_config.tc_valid_bits) {
                dev_info(&pf->pdev->dev,
                         "Enabled TCs mismatch from querying VSI BW info 0x%08x 0x%08x\n",
                         bw_config.tc_valid_bits,
                         bw_ets_config.tc_valid_bits);
                /* Still continuing */
        }

        vsi->bw_limit = le16_to_cpu(bw_config.port_bw_limit);
        vsi->bw_max_quanta = bw_config.max_bw;
        tc_bw_max = le16_to_cpu(bw_ets_config.tc_bw_max[0]) |
                    (le16_to_cpu(bw_ets_config.tc_bw_max[1]) << 16);
        for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
                vsi->bw_ets_share_credits[i] = bw_ets_config.share_credits[i];
                vsi->bw_ets_limit_credits[i] =
                                        le16_to_cpu(bw_ets_config.credits[i]);
                /* 3 bits out of 4 for each TC */
                vsi->bw_ets_max_quanta[i] = (u8)((tc_bw_max >> (i*4)) & 0x7);
        }

        return 0;
}

/**
 * i40e_vsi_configure_bw_alloc - Configure VSI BW allocation per TC
 * @vsi: the VSI being configured
 * @enabled_tc: TC bitmap
 * @bw_share: BW shared credits per TC
 *
 * Returns 0 on success, negative value on failure
 **/
static int i40e_vsi_configure_bw_alloc(struct i40e_vsi *vsi, u8 enabled_tc,
                                       u8 *bw_share)
{
        struct i40e_aqc_configure_vsi_tc_bw_data bw_data;
        struct i40e_pf *pf = vsi->back;
        int ret;
        int i;

        /* There is no need to reset BW when mqprio mode is on.  */
        if (i40e_is_tc_mqprio_enabled(pf))
                return 0;
        if (!vsi->mqprio_qopt.qopt.hw && !test_bit(I40E_FLAG_DCB_ENA, pf->flags)) {
                ret = i40e_set_bw_limit(vsi, vsi->seid, 0);
                if (ret)
                        dev_info(&pf->pdev->dev,
                                 "Failed to reset tx rate for vsi->seid %u\n",
                                 vsi->seid);
                return ret;
        }
        memset(&bw_data, 0, sizeof(bw_data));
        bw_data.tc_valid_bits = enabled_tc;
        for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++)
                bw_data.tc_bw_credits[i] = bw_share[i];

        ret = i40e_aq_config_vsi_tc_bw(&pf->hw, vsi->seid, &bw_data, NULL);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "AQ command Config VSI BW allocation per TC failed = %d\n",
                         pf->hw.aq.asq_last_status);
                return -EINVAL;
        }

        for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++)
                vsi->info.qs_handle[i] = bw_data.qs_handles[i];

        return 0;
}

/**
 * i40e_vsi_config_netdev_tc - Setup the netdev TC configuration
 * @vsi: the VSI being configured
 * @enabled_tc: TC map to be enabled
 *
 **/
static void i40e_vsi_config_netdev_tc(struct i40e_vsi *vsi, u8 enabled_tc)
{
        struct net_device *netdev = vsi->netdev;
        struct i40e_pf *pf = vsi->back;
        struct i40e_hw *hw = &pf->hw;
        u8 netdev_tc = 0;
        int i;
        struct i40e_dcbx_config *dcbcfg = &hw->local_dcbx_config;

        if (!netdev)
                return;

        if (!enabled_tc) {
                netdev_reset_tc(netdev);
                return;
        }

        /* Set up actual enabled TCs on the VSI */
        if (netdev_set_num_tc(netdev, vsi->tc_config.numtc))
                return;

        /* set per TC queues for the VSI */
        for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
                /* Only set TC queues for enabled tcs
                 *
                 * e.g. For a VSI that has TC0 and TC3 enabled the
                 * enabled_tc bitmap would be 0x00001001; the driver
                 * will set the numtc for netdev as 2 that will be
                 * referenced by the netdev layer as TC 0 and 1.
                 */
                if (vsi->tc_config.enabled_tc & BIT(i))
                        netdev_set_tc_queue(netdev,
                                        vsi->tc_config.tc_info[i].netdev_tc,
                                        vsi->tc_config.tc_info[i].qcount,
                                        vsi->tc_config.tc_info[i].qoffset);
        }

        if (i40e_is_tc_mqprio_enabled(pf))
                return;

        /* Assign UP2TC map for the VSI */
        for (i = 0; i < I40E_MAX_USER_PRIORITY; i++) {
                /* Get the actual TC# for the UP */
                u8 ets_tc = dcbcfg->etscfg.prioritytable[i];
                /* Get the mapped netdev TC# for the UP */
                netdev_tc =  vsi->tc_config.tc_info[ets_tc].netdev_tc;
                netdev_set_prio_tc_map(netdev, i, netdev_tc);
        }
}

/**
 * i40e_vsi_update_queue_map - Update our copy of VSi info with new queue map
 * @vsi: the VSI being configured
 * @ctxt: the ctxt buffer returned from AQ VSI update param command
 **/
static void i40e_vsi_update_queue_map(struct i40e_vsi *vsi,
                                      struct i40e_vsi_context *ctxt)
{
        /* copy just the sections touched not the entire info
         * since not all sections are valid as returned by
         * update vsi params
         */
        vsi->info.mapping_flags = ctxt->info.mapping_flags;
        memcpy(&vsi->info.queue_mapping,
               &ctxt->info.queue_mapping, sizeof(vsi->info.queue_mapping));
        memcpy(&vsi->info.tc_mapping, ctxt->info.tc_mapping,
               sizeof(vsi->info.tc_mapping));
}

/**
 * i40e_update_adq_vsi_queues - update queue mapping for ADq VSI
 * @vsi: the VSI being reconfigured
 * @vsi_offset: offset from main VF VSI
 */
int i40e_update_adq_vsi_queues(struct i40e_vsi *vsi, int vsi_offset)
{
        struct i40e_vsi_context ctxt = {};
        struct i40e_pf *pf;
        struct i40e_hw *hw;
        int ret;

        if (!vsi)
                return -EINVAL;
        pf = vsi->back;
        hw = &pf->hw;

        ctxt.seid = vsi->seid;
        ctxt.pf_num = hw->pf_id;
        ctxt.vf_num = vsi->vf_id + hw->func_caps.vf_base_id + vsi_offset;
        ctxt.uplink_seid = vsi->uplink_seid;
        ctxt.connection_type = I40E_AQ_VSI_CONN_TYPE_NORMAL;
        ctxt.flags = I40E_AQ_VSI_TYPE_VF;
        ctxt.info = vsi->info;

        i40e_vsi_setup_queue_map(vsi, &ctxt, vsi->tc_config.enabled_tc,
                                 false);
        if (vsi->reconfig_rss) {
                vsi->rss_size = min_t(int, pf->alloc_rss_size,
                                      vsi->num_queue_pairs);
                ret = i40e_vsi_config_rss(vsi);
                if (ret) {
                        dev_info(&pf->pdev->dev, "Failed to reconfig rss for num_queues\n");
                        return ret;
                }
                vsi->reconfig_rss = false;
        }

        ret = i40e_aq_update_vsi_params(hw, &ctxt, NULL);
        if (ret) {
                dev_info(&pf->pdev->dev, "Update vsi config failed, err %pe aq_err %s\n",
                         ERR_PTR(ret),
                         i40e_aq_str(hw, hw->aq.asq_last_status));
                return ret;
        }
        /* update the local VSI info with updated queue map */
        i40e_vsi_update_queue_map(vsi, &ctxt);
        vsi->info.valid_sections = 0;

        return ret;
}

/**
 * i40e_vsi_config_tc - Configure VSI Tx Scheduler for given TC map
 * @vsi: VSI to be configured
 * @enabled_tc: TC bitmap
 *
 * This configures a particular VSI for TCs that are mapped to the
 * given TC bitmap. It uses default bandwidth share for TCs across
 * VSIs to configure TC for a particular VSI.
 *
 * NOTE:
 * It is expected that the VSI queues have been quisced before calling
 * this function.
 **/
static int i40e_vsi_config_tc(struct i40e_vsi *vsi, u8 enabled_tc)
{
        u8 bw_share[I40E_MAX_TRAFFIC_CLASS] = {0};
        struct i40e_pf *pf = vsi->back;
        struct i40e_hw *hw = &pf->hw;
        struct i40e_vsi_context ctxt;
        int ret = 0;
        int i;

        /* Check if enabled_tc is same as existing or new TCs */
        if (vsi->tc_config.enabled_tc == enabled_tc &&
            vsi->mqprio_qopt.mode != TC_MQPRIO_MODE_CHANNEL)
                return ret;

        /* Enable ETS TCs with equal BW Share for now across all VSIs */
        for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
                if (enabled_tc & BIT(i))
                        bw_share[i] = 1;
        }

        ret = i40e_vsi_configure_bw_alloc(vsi, enabled_tc, bw_share);
        if (ret) {
                struct i40e_aqc_query_vsi_bw_config_resp bw_config = {0};

                dev_info(&pf->pdev->dev,
                         "Failed configuring TC map %d for VSI %d\n",
                         enabled_tc, vsi->seid);
                ret = i40e_aq_query_vsi_bw_config(hw, vsi->seid,
                                                  &bw_config, NULL);
                if (ret) {
                        dev_info(&pf->pdev->dev,
                                 "Failed querying vsi bw info, err %pe aq_err %s\n",
                                 ERR_PTR(ret),
                                 i40e_aq_str(hw, hw->aq.asq_last_status));
                        goto out;
                }
                if ((bw_config.tc_valid_bits & enabled_tc) != enabled_tc) {
                        u8 valid_tc = bw_config.tc_valid_bits & enabled_tc;

                        if (!valid_tc)
                                valid_tc = bw_config.tc_valid_bits;
                        /* Always enable TC0, no matter what */
                        valid_tc |= 1;
                        dev_info(&pf->pdev->dev,
                                 "Requested tc 0x%x, but FW reports 0x%x as valid. Attempting to use 0x%x.\n",
                                 enabled_tc, bw_config.tc_valid_bits, valid_tc);
                        enabled_tc = valid_tc;
                }

                ret = i40e_vsi_configure_bw_alloc(vsi, enabled_tc, bw_share);
                if (ret) {
                        dev_err(&pf->pdev->dev,
                                "Unable to  configure TC map %d for VSI %d\n",
                                enabled_tc, vsi->seid);
                        goto out;
                }
        }

        /* Update Queue Pairs Mapping for currently enabled UPs */
        ctxt.seid = vsi->seid;
        ctxt.pf_num = vsi->back->hw.pf_id;
        ctxt.vf_num = 0;
        ctxt.uplink_seid = vsi->uplink_seid;
        ctxt.info = vsi->info;
        if (i40e_is_tc_mqprio_enabled(pf)) {
                ret = i40e_vsi_setup_queue_map_mqprio(vsi, &ctxt, enabled_tc);
                if (ret)
                        goto out;
        } else {
                i40e_vsi_setup_queue_map(vsi, &ctxt, enabled_tc, false);
        }

        /* On destroying the qdisc, reset vsi->rss_size, as number of enabled
         * queues changed.
         */
        if (!vsi->mqprio_qopt.qopt.hw && vsi->reconfig_rss) {
                vsi->rss_size = min_t(int, vsi->back->alloc_rss_size,
                                      vsi->num_queue_pairs);
                ret = i40e_vsi_config_rss(vsi);
                if (ret) {
                        dev_info(&vsi->back->pdev->dev,
                                 "Failed to reconfig rss for num_queues\n");
                        return ret;
                }
                vsi->reconfig_rss = false;
        }
        if (test_bit(I40E_FLAG_IWARP_ENA, vsi->back->flags)) {
                ctxt.info.valid_sections |=
                                cpu_to_le16(I40E_AQ_VSI_PROP_QUEUE_OPT_VALID);
                ctxt.info.queueing_opt_flags |= I40E_AQ_VSI_QUE_OPT_TCP_ENA;
        }

        /* Update the VSI after updating the VSI queue-mapping
         * information
         */
        ret = i40e_aq_update_vsi_params(hw, &ctxt, NULL);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "Update vsi tc config failed, err %pe aq_err %s\n",
                         ERR_PTR(ret),
                         i40e_aq_str(hw, hw->aq.asq_last_status));
                goto out;
        }
        /* update the local VSI info with updated queue map */
        i40e_vsi_update_queue_map(vsi, &ctxt);
        vsi->info.valid_sections = 0;

        /* Update current VSI BW information */
        ret = i40e_vsi_get_bw_info(vsi);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "Failed updating vsi bw info, err %pe aq_err %s\n",
                         ERR_PTR(ret),
                         i40e_aq_str(hw, hw->aq.asq_last_status));
                goto out;
        }

        /* Update the netdev TC setup */
        i40e_vsi_config_netdev_tc(vsi, enabled_tc);
out:
        return ret;
}

/**
 * i40e_vsi_reconfig_tc - Reconfigure VSI Tx Scheduler for stored TC map
 * @vsi: VSI to be reconfigured
 *
 * This reconfigures a particular VSI for TCs that are mapped to the
 * TC bitmap stored previously for the VSI.
 *
 * Context: It is expected that the VSI queues have been quisced before
 *          calling this function.
 *
 * Return: 0 on success, negative value on failure
 **/
static int i40e_vsi_reconfig_tc(struct i40e_vsi *vsi)
{
        u8 enabled_tc;

        enabled_tc = vsi->tc_config.enabled_tc;
        vsi->tc_config.enabled_tc = 0;

        return i40e_vsi_config_tc(vsi, enabled_tc);
}

/**
 * i40e_get_link_speed - Returns link speed for the interface
 * @vsi: VSI to be configured
 *
 **/
static int i40e_get_link_speed(struct i40e_vsi *vsi)
{
        struct i40e_pf *pf = vsi->back;

        switch (pf->hw.phy.link_info.link_speed) {
        case I40E_LINK_SPEED_40GB:
                return 40000;
        case I40E_LINK_SPEED_25GB:
                return 25000;
        case I40E_LINK_SPEED_20GB:
                return 20000;
        case I40E_LINK_SPEED_10GB:
                return 10000;
        case I40E_LINK_SPEED_1GB:
                return 1000;
        default:
                return -EINVAL;
        }
}

/**
 * i40e_bw_bytes_to_mbits - Convert max_tx_rate from bytes to mbits
 * @vsi: Pointer to vsi structure
 * @max_tx_rate: max TX rate in bytes to be converted into Mbits
 *
 * Helper function to convert units before send to set BW limit
 **/
static u64 i40e_bw_bytes_to_mbits(struct i40e_vsi *vsi, u64 max_tx_rate)
{
        if (max_tx_rate < I40E_BW_MBPS_DIVISOR) {
                dev_warn(&vsi->back->pdev->dev,
                         "Setting max tx rate to minimum usable value of 50Mbps.\n");
                max_tx_rate = I40E_BW_CREDIT_DIVISOR;
        } else {
                do_div(max_tx_rate, I40E_BW_MBPS_DIVISOR);
        }

        return max_tx_rate;
}

/**
 * i40e_set_bw_limit - setup BW limit for Tx traffic based on max_tx_rate
 * @vsi: VSI to be configured
 * @seid: seid of the channel/VSI
 * @max_tx_rate: max TX rate to be configured as BW limit
 *
 * Helper function to set BW limit for a given VSI
 **/
int i40e_set_bw_limit(struct i40e_vsi *vsi, u16 seid, u64 max_tx_rate)
{
        struct i40e_pf *pf = vsi->back;
        u64 credits = 0;
        int speed = 0;
        int ret = 0;

        speed = i40e_get_link_speed(vsi);
        if (max_tx_rate > speed) {
                dev_err(&pf->pdev->dev,
                        "Invalid max tx rate %llu specified for VSI seid %d.",
                        max_tx_rate, seid);
                return -EINVAL;
        }
        if (max_tx_rate && max_tx_rate < I40E_BW_CREDIT_DIVISOR) {
                dev_warn(&pf->pdev->dev,
                         "Setting max tx rate to minimum usable value of 50Mbps.\n");
                max_tx_rate = I40E_BW_CREDIT_DIVISOR;
        }

        /* Tx rate credits are in values of 50Mbps, 0 is disabled */
        credits = max_tx_rate;
        do_div(credits, I40E_BW_CREDIT_DIVISOR);
        ret = i40e_aq_config_vsi_bw_limit(&pf->hw, seid, credits,
                                          I40E_MAX_BW_INACTIVE_ACCUM, NULL);
        if (ret)
                dev_err(&pf->pdev->dev,
                        "Failed set tx rate (%llu Mbps) for vsi->seid %u, err %pe aq_err %s\n",
                        max_tx_rate, seid, ERR_PTR(ret),
                        i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
        return ret;
}

/**
 * i40e_remove_queue_channels - Remove queue channels for the TCs
 * @vsi: VSI to be configured
 *
 * Remove queue channels for the TCs
 **/
static void i40e_remove_queue_channels(struct i40e_vsi *vsi)
{
        enum i40e_admin_queue_err last_aq_status;
        struct i40e_cloud_filter *cfilter;
        struct i40e_channel *ch, *ch_tmp;
        struct i40e_pf *pf = vsi->back;
        struct hlist_node *node;
        int ret, i;

        /* Reset rss size that was stored when reconfiguring rss for
         * channel VSIs with non-power-of-2 queue count.
         */
        vsi->current_rss_size = 0;

        /* perform cleanup for channels if they exist */
        if (list_empty(&vsi->ch_list))
                return;

        list_for_each_entry_safe(ch, ch_tmp, &vsi->ch_list, list) {
                struct i40e_vsi *p_vsi;

                list_del(&ch->list);
                p_vsi = ch->parent_vsi;
                if (!p_vsi || !ch->initialized) {
                        kfree(ch);
                        continue;
                }
                /* Reset queue contexts */
                for (i = 0; i < ch->num_queue_pairs; i++) {
                        struct i40e_ring *tx_ring, *rx_ring;
                        u16 pf_q;

                        pf_q = ch->base_queue + i;
                        tx_ring = vsi->tx_rings[pf_q];
                        tx_ring->ch = NULL;

                        rx_ring = vsi->rx_rings[pf_q];
                        rx_ring->ch = NULL;
                }

                /* Reset BW configured for this VSI via mqprio */
                ret = i40e_set_bw_limit(vsi, ch->seid, 0);
                if (ret)
                        dev_info(&vsi->back->pdev->dev,
                                 "Failed to reset tx rate for ch->seid %u\n",
                                 ch->seid);

                /* delete cloud filters associated with this channel */
                hlist_for_each_entry_safe(cfilter, node,
                                          &pf->cloud_filter_list, cloud_node) {
                        if (cfilter->seid != ch->seid)
                                continue;

                        hash_del(&cfilter->cloud_node);
                        if (cfilter->dst_port)
                                ret = i40e_add_del_cloud_filter_big_buf(vsi,
                                                                        cfilter,
                                                                        false);
                        else
                                ret = i40e_add_del_cloud_filter(vsi, cfilter,
                                                                false);
                        last_aq_status = pf->hw.aq.asq_last_status;
                        if (ret)
                                dev_info(&pf->pdev->dev,
                                         "Failed to delete cloud filter, err %pe aq_err %s\n",
                                         ERR_PTR(ret),
                                         i40e_aq_str(&pf->hw, last_aq_status));
                        kfree(cfilter);
                }

                /* delete VSI from FW */
                ret = i40e_aq_delete_element(&vsi->back->hw, ch->seid,
                                             NULL);
                if (ret)
                        dev_err(&vsi->back->pdev->dev,
                                "unable to remove channel (%d) for parent VSI(%d)\n",
                                ch->seid, p_vsi->seid);
                kfree(ch);
        }
        INIT_LIST_HEAD(&vsi->ch_list);
}

/**
 * i40e_get_max_queues_for_channel
 * @vsi: ptr to VSI to which channels are associated with
 *
 * Helper function which returns max value among the queue counts set on the
 * channels/TCs created.
 **/
static int i40e_get_max_queues_for_channel(struct i40e_vsi *vsi)
{
        struct i40e_channel *ch, *ch_tmp;
        int max = 0;

        list_for_each_entry_safe(ch, ch_tmp, &vsi->ch_list, list) {
                if (!ch->initialized)
                        continue;
                if (ch->num_queue_pairs > max)
                        max = ch->num_queue_pairs;
        }

        return max;
}

/**
 * i40e_validate_num_queues - validate num_queues w.r.t channel
 * @pf: ptr to PF device
 * @num_queues: number of queues
 * @vsi: the parent VSI
 * @reconfig_rss: indicates should the RSS be reconfigured or not
 *
 * This function validates number of queues in the context of new channel
 * which is being established and determines if RSS should be reconfigured
 * or not for parent VSI.
 **/
static int i40e_validate_num_queues(struct i40e_pf *pf, int num_queues,
                                    struct i40e_vsi *vsi, bool *reconfig_rss)
{
        int max_ch_queues;

        if (!reconfig_rss)
                return -EINVAL;

        *reconfig_rss = false;
        if (vsi->current_rss_size) {
                if (num_queues > vsi->current_rss_size) {
                        dev_dbg(&pf->pdev->dev,
                                "Error: num_queues (%d) > vsi's current_size(%d)\n",
                                num_queues, vsi->current_rss_size);
                        return -EINVAL;
                } else if ((num_queues < vsi->current_rss_size) &&
                           (!is_power_of_2(num_queues))) {
                        dev_dbg(&pf->pdev->dev,
                                "Error: num_queues (%d) < vsi's current_size(%d), but not power of 2\n",
                                num_queues, vsi->current_rss_size);
                        return -EINVAL;
                }
        }

        if (!is_power_of_2(num_queues)) {
                /* Find the max num_queues configured for channel if channel
                 * exist.
                 * if channel exist, then enforce 'num_queues' to be more than
                 * max ever queues configured for channel.
                 */
                max_ch_queues = i40e_get_max_queues_for_channel(vsi);
                if (num_queues < max_ch_queues) {
                        dev_dbg(&pf->pdev->dev,
                                "Error: num_queues (%d) < max queues configured for channel(%d)\n",
                                num_queues, max_ch_queues);
                        return -EINVAL;
                }
                *reconfig_rss = true;
        }

        return 0;
}

/**
 * i40e_vsi_reconfig_rss - reconfig RSS based on specified rss_size
 * @vsi: the VSI being setup
 * @rss_size: size of RSS, accordingly LUT gets reprogrammed
 *
 * This function reconfigures RSS by reprogramming LUTs using 'rss_size'
 **/
static int i40e_vsi_reconfig_rss(struct i40e_vsi *vsi, u16 rss_size)
{
        struct i40e_pf *pf = vsi->back;
        u8 seed[I40E_HKEY_ARRAY_SIZE];
        struct i40e_hw *hw = &pf->hw;
        int local_rss_size;
        u8 *lut;
        int ret;

        if (!vsi->rss_size)
                return -EINVAL;

        if (rss_size > vsi->rss_size)
                return -EINVAL;

        local_rss_size = min_t(int, vsi->rss_size, rss_size);
        lut = kzalloc(vsi->rss_table_size, GFP_KERNEL);
        if (!lut)
                return -ENOMEM;

        /* Ignoring user configured lut if there is one */
        i40e_fill_rss_lut(pf, lut, vsi->rss_table_size, local_rss_size);

        /* Use user configured hash key if there is one, otherwise
         * use default.
         */
        if (vsi->rss_hkey_user)
                memcpy(seed, vsi->rss_hkey_user, I40E_HKEY_ARRAY_SIZE);
        else
                netdev_rss_key_fill((void *)seed, I40E_HKEY_ARRAY_SIZE);

        ret = i40e_config_rss(vsi, seed, lut, vsi->rss_table_size);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "Cannot set RSS lut, err %pe aq_err %s\n",
                         ERR_PTR(ret),
                         i40e_aq_str(hw, hw->aq.asq_last_status));
                kfree(lut);
                return ret;
        }
        kfree(lut);

        /* Do the update w.r.t. storing rss_size */
        if (!vsi->orig_rss_size)
                vsi->orig_rss_size = vsi->rss_size;
        vsi->current_rss_size = local_rss_size;

        return ret;
}

/**
 * i40e_channel_setup_queue_map - Setup a channel queue map
 * @pf: ptr to PF device
 * @ctxt: VSI context structure
 * @ch: ptr to channel structure
 *
 * Setup queue map for a specific channel
 **/
static void i40e_channel_setup_queue_map(struct i40e_pf *pf,
                                         struct i40e_vsi_context *ctxt,
                                         struct i40e_channel *ch)
{
        u16 qcount, qmap, sections = 0;
        u8 offset = 0;
        int pow;

        sections = I40E_AQ_VSI_PROP_QUEUE_MAP_VALID;
        sections |= I40E_AQ_VSI_PROP_SCHED_VALID;

        qcount = min_t(int, ch->num_queue_pairs, pf->num_lan_msix);
        ch->num_queue_pairs = qcount;

        /* find the next higher power-of-2 of num queue pairs */
        pow = ilog2(qcount);
        if (!is_power_of_2(qcount))
                pow++;

        qmap = (offset << I40E_AQ_VSI_TC_QUE_OFFSET_SHIFT) |
                (pow << I40E_AQ_VSI_TC_QUE_NUMBER_SHIFT);

        /* Setup queue TC[0].qmap for given VSI context */
        ctxt->info.tc_mapping[0] = cpu_to_le16(qmap);

        ctxt->info.up_enable_bits = 0x1; /* TC0 enabled */
        ctxt->info.mapping_flags |= cpu_to_le16(I40E_AQ_VSI_QUE_MAP_CONTIG);
        ctxt->info.queue_mapping[0] = cpu_to_le16(ch->base_queue);
        ctxt->info.valid_sections |= cpu_to_le16(sections);
}

/**
 * i40e_add_channel - add a channel by adding VSI
 * @pf: ptr to PF device
 * @uplink_seid: underlying HW switching element (VEB) ID
 * @ch: ptr to channel structure
 *
 * Add a channel (VSI) using add_vsi and queue_map
 **/
static int i40e_add_channel(struct i40e_pf *pf, u16 uplink_seid,
                            struct i40e_channel *ch)
{
        struct i40e_hw *hw = &pf->hw;
        struct i40e_vsi_context ctxt;
        u8 enabled_tc = 0x1; /* TC0 enabled */
        int ret;

        if (ch->type != I40E_VSI_VMDQ2) {
                dev_info(&pf->pdev->dev,
                         "add new vsi failed, ch->type %d\n", ch->type);
                return -EINVAL;
        }

        memset(&ctxt, 0, sizeof(ctxt));
        ctxt.pf_num = hw->pf_id;
        ctxt.vf_num = 0;
        ctxt.uplink_seid = uplink_seid;
        ctxt.connection_type = I40E_AQ_VSI_CONN_TYPE_NORMAL;
        if (ch->type == I40E_VSI_VMDQ2)
                ctxt.flags = I40E_AQ_VSI_TYPE_VMDQ2;

        if (test_bit(I40E_FLAG_VEB_MODE_ENA, pf->flags)) {
                ctxt.info.valid_sections |=
                     cpu_to_le16(I40E_AQ_VSI_PROP_SWITCH_VALID);
                ctxt.info.switch_id =
                   cpu_to_le16(I40E_AQ_VSI_SW_ID_FLAG_ALLOW_LB);
        }

        /* Set queue map for a given VSI context */
        i40e_channel_setup_queue_map(pf, &ctxt, ch);

        /* Now time to create VSI */
        ret = i40e_aq_add_vsi(hw, &ctxt, NULL);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "add new vsi failed, err %pe aq_err %s\n",
                         ERR_PTR(ret),
                         i40e_aq_str(&pf->hw,
                                     pf->hw.aq.asq_last_status));
                return -ENOENT;
        }

        /* Success, update channel, set enabled_tc only if the channel
         * is not a macvlan
         */
        ch->enabled_tc = !i40e_is_channel_macvlan(ch) && enabled_tc;
        ch->seid = ctxt.seid;
        ch->vsi_number = ctxt.vsi_number;
        ch->stat_counter_idx = le16_to_cpu(ctxt.info.stat_counter_idx);

        /* copy just the sections touched not the entire info
         * since not all sections are valid as returned by
         * update vsi params
         */
        ch->info.mapping_flags = ctxt.info.mapping_flags;
        memcpy(&ch->info.queue_mapping,
               &ctxt.info.queue_mapping, sizeof(ctxt.info.queue_mapping));
        memcpy(&ch->info.tc_mapping, ctxt.info.tc_mapping,
               sizeof(ctxt.info.tc_mapping));

        return 0;
}

static int i40e_channel_config_bw(struct i40e_vsi *vsi, struct i40e_channel *ch,
                                  u8 *bw_share)
{
        struct i40e_aqc_configure_vsi_tc_bw_data bw_data;
        int ret;
        int i;

        memset(&bw_data, 0, sizeof(bw_data));
        bw_data.tc_valid_bits = ch->enabled_tc;
        for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++)
                bw_data.tc_bw_credits[i] = bw_share[i];

        ret = i40e_aq_config_vsi_tc_bw(&vsi->back->hw, ch->seid,
                                       &bw_data, NULL);
        if (ret) {
                dev_info(&vsi->back->pdev->dev,
                         "Config VSI BW allocation per TC failed, aq_err: %d for new_vsi->seid %u\n",
                         vsi->back->hw.aq.asq_last_status, ch->seid);
                return -EINVAL;
        }

        for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++)
                ch->info.qs_handle[i] = bw_data.qs_handles[i];

        return 0;
}

/**
 * i40e_channel_config_tx_ring - config TX ring associated with new channel
 * @pf: ptr to PF device
 * @vsi: the VSI being setup
 * @ch: ptr to channel structure
 *
 * Configure TX rings associated with channel (VSI) since queues are being
 * from parent VSI.
 **/
static int i40e_channel_config_tx_ring(struct i40e_pf *pf,
                                       struct i40e_vsi *vsi,
                                       struct i40e_channel *ch)
{
        u8 bw_share[I40E_MAX_TRAFFIC_CLASS] = {0};
        int ret;
        int i;

        /* Enable ETS TCs with equal BW Share for now across all VSIs */
        for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
                if (ch->enabled_tc & BIT(i))
                        bw_share[i] = 1;
        }

        /* configure BW for new VSI */
        ret = i40e_channel_config_bw(vsi, ch, bw_share);
        if (ret) {
                dev_info(&vsi->back->pdev->dev,
                         "Failed configuring TC map %d for channel (seid %u)\n",
                         ch->enabled_tc, ch->seid);
                return ret;
        }

        for (i = 0; i < ch->num_queue_pairs; i++) {
                struct i40e_ring *tx_ring, *rx_ring;
                u16 pf_q;

                pf_q = ch->base_queue + i;

                /* Get to TX ring ptr of main VSI, for re-setup TX queue
                 * context
                 */
                tx_ring = vsi->tx_rings[pf_q];
                tx_ring->ch = ch;

                /* Get the RX ring ptr */
                rx_ring = vsi->rx_rings[pf_q];
                rx_ring->ch = ch;
        }

        return 0;
}

/**
 * i40e_setup_hw_channel - setup new channel
 * @pf: ptr to PF device
 * @vsi: the VSI being setup
 * @ch: ptr to channel structure
 * @uplink_seid: underlying HW switching element (VEB) ID
 * @type: type of channel to be created (VMDq2/VF)
 *
 * Setup new channel (VSI) based on specified type (VMDq2/VF)
 * and configures TX rings accordingly
 **/
static inline int i40e_setup_hw_channel(struct i40e_pf *pf,
                                        struct i40e_vsi *vsi,
                                        struct i40e_channel *ch,
                                        u16 uplink_seid, u8 type)
{
        int ret;

        ch->initialized = false;
        ch->base_queue = vsi->next_base_queue;
        ch->type = type;

        /* Proceed with creation of channel (VMDq2) VSI */
        ret = i40e_add_channel(pf, uplink_seid, ch);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "failed to add_channel using uplink_seid %u\n",
                         uplink_seid);
                return ret;
        }

        /* Mark the successful creation of channel */
        ch->initialized = true;

        /* Reconfigure TX queues using QTX_CTL register */
        ret = i40e_channel_config_tx_ring(pf, vsi, ch);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "failed to configure TX rings for channel %u\n",
                         ch->seid);
                return ret;
        }

        /* update 'next_base_queue' */
        vsi->next_base_queue = vsi->next_base_queue + ch->num_queue_pairs;
        dev_dbg(&pf->pdev->dev,
                "Added channel: vsi_seid %u, vsi_number %u, stat_counter_idx %u, num_queue_pairs %u, pf->next_base_queue %d\n",
                ch->seid, ch->vsi_number, ch->stat_counter_idx,
                ch->num_queue_pairs,
                vsi->next_base_queue);
        return ret;
}

/**
 * i40e_setup_channel - setup new channel using uplink element
 * @pf: ptr to PF device
 * @vsi: pointer to the VSI to set up the channel within
 * @ch: ptr to channel structure
 *
 * Setup new channel (VSI) based on specified type (VMDq2/VF)
 * and uplink switching element (uplink_seid)
 **/
static bool i40e_setup_channel(struct i40e_pf *pf, struct i40e_vsi *vsi,
                               struct i40e_channel *ch)
{
        struct i40e_vsi *main_vsi;
        u8 vsi_type;
        u16 seid;
        int ret;

        if (vsi->type == I40E_VSI_MAIN) {
                vsi_type = I40E_VSI_VMDQ2;
        } else {
                dev_err(&pf->pdev->dev, "unsupported parent vsi type(%d)\n",
                        vsi->type);
                return false;
        }

        /* underlying switching element */
        main_vsi = i40e_pf_get_main_vsi(pf);
        seid = main_vsi->uplink_seid;

        /* create channel (VSI), configure TX rings */
        ret = i40e_setup_hw_channel(pf, vsi, ch, seid, vsi_type);
        if (ret) {
                dev_err(&pf->pdev->dev, "failed to setup hw_channel\n");
                return false;
        }

        return ch->initialized ? true : false;
}

/**
 * i40e_validate_and_set_switch_mode - sets up switch mode correctly
 * @vsi: ptr to VSI which has PF backing
 *
 * Sets up switch mode correctly if it needs to be changed and perform
 * what are allowed modes.
 **/
static int i40e_validate_and_set_switch_mode(struct i40e_vsi *vsi)
{
        u8 mode;
        struct i40e_pf *pf = vsi->back;
        struct i40e_hw *hw = &pf->hw;
        int ret;

        ret = i40e_get_capabilities(pf, i40e_aqc_opc_list_dev_capabilities);
        if (ret)
                return -EINVAL;

        if (hw->dev_caps.switch_mode) {
                /* if switch mode is set, support mode2 (non-tunneled for
                 * cloud filter) for now
                 */
                u32 switch_mode = hw->dev_caps.switch_mode &
                                  I40E_SWITCH_MODE_MASK;
                if (switch_mode >= I40E_CLOUD_FILTER_MODE1) {
                        if (switch_mode == I40E_CLOUD_FILTER_MODE2)
                                return 0;
                        dev_err(&pf->pdev->dev,
                                "Invalid switch_mode (%d), only non-tunneled mode for cloud filter is supported\n",
                                hw->dev_caps.switch_mode);
                        return -EINVAL;
                }
        }

        /* Set Bit 7 to be valid */
        mode = I40E_AQ_SET_SWITCH_BIT7_VALID;

        /* Set L4type for TCP support */
        mode |= I40E_AQ_SET_SWITCH_L4_TYPE_TCP;

        /* Set cloud filter mode */
        mode |= I40E_AQ_SET_SWITCH_MODE_NON_TUNNEL;

        /* Prep mode field for set_switch_config */
        ret = i40e_aq_set_switch_config(hw, pf->last_sw_conf_flags,
                                        pf->last_sw_conf_valid_flags,
                                        mode, NULL);
        if (ret && hw->aq.asq_last_status != I40E_AQ_RC_ESRCH)
                dev_err(&pf->pdev->dev,
                        "couldn't set switch config bits, err %pe aq_err %s\n",
                        ERR_PTR(ret),
                        i40e_aq_str(hw,
                                    hw->aq.asq_last_status));

        return ret;
}

/**
 * i40e_create_queue_channel - function to create channel
 * @vsi: VSI to be configured
 * @ch: ptr to channel (it contains channel specific params)
 *
 * This function creates channel (VSI) using num_queues specified by user,
 * reconfigs RSS if needed.
 **/
int i40e_create_queue_channel(struct i40e_vsi *vsi,
                              struct i40e_channel *ch)
{
        struct i40e_pf *pf = vsi->back;
        bool reconfig_rss;
        int err;

        if (!ch)
                return -EINVAL;

        if (!ch->num_queue_pairs) {
                dev_err(&pf->pdev->dev, "Invalid num_queues requested: %d\n",
                        ch->num_queue_pairs);
                return -EINVAL;
        }

        /* validate user requested num_queues for channel */
        err = i40e_validate_num_queues(pf, ch->num_queue_pairs, vsi,
                                       &reconfig_rss);
        if (err) {
                dev_info(&pf->pdev->dev, "Failed to validate num_queues (%d)\n",
                         ch->num_queue_pairs);
                return -EINVAL;
        }

        /* By default we are in VEPA mode, if this is the first VF/VMDq
         * VSI to be added switch to VEB mode.
         */

        if (!test_bit(I40E_FLAG_VEB_MODE_ENA, pf->flags)) {
                set_bit(I40E_FLAG_VEB_MODE_ENA, pf->flags);

                if (vsi->type == I40E_VSI_MAIN) {
                        if (i40e_is_tc_mqprio_enabled(pf))
                                i40e_do_reset(pf, I40E_PF_RESET_FLAG, true);
                        else
                                i40e_do_reset_safe(pf, I40E_PF_RESET_FLAG);
                }
                /* now onwards for main VSI, number of queues will be value
                 * of TC0's queue count
                 */
        }

        /* By this time, vsi->cnt_q_avail shall be set to non-zero and
         * it should be more than num_queues
         */
        if (!vsi->cnt_q_avail || vsi->cnt_q_avail < ch->num_queue_pairs) {
                dev_dbg(&pf->pdev->dev,
                        "Error: cnt_q_avail (%u) less than num_queues %d\n",
                        vsi->cnt_q_avail, ch->num_queue_pairs);
                return -EINVAL;
        }

        /* reconfig_rss only if vsi type is MAIN_VSI */
        if (reconfig_rss && (vsi->type == I40E_VSI_MAIN)) {
                err = i40e_vsi_reconfig_rss(vsi, ch->num_queue_pairs);
                if (err) {
                        dev_info(&pf->pdev->dev,
                                 "Error: unable to reconfig rss for num_queues (%u)\n",
                                 ch->num_queue_pairs);
                        return -EINVAL;
                }
        }

        if (!i40e_setup_channel(pf, vsi, ch)) {
                dev_info(&pf->pdev->dev, "Failed to setup channel\n");
                return -EINVAL;
        }

        dev_info(&pf->pdev->dev,
                 "Setup channel (id:%u) utilizing num_queues %d\n",
                 ch->seid, ch->num_queue_pairs);

        /* configure VSI for BW limit */
        if (ch->max_tx_rate) {
                u64 credits = ch->max_tx_rate;

                if (i40e_set_bw_limit(vsi, ch->seid, ch->max_tx_rate))
                        return -EINVAL;

                do_div(credits, I40E_BW_CREDIT_DIVISOR);
                dev_dbg(&pf->pdev->dev,
                        "Set tx rate of %llu Mbps (count of 50Mbps %llu) for vsi->seid %u\n",
                        ch->max_tx_rate,
                        credits,
                        ch->seid);
        }

        /* in case of VF, this will be main SRIOV VSI */
        ch->parent_vsi = vsi;

        /* and update main_vsi's count for queue_available to use */
        vsi->cnt_q_avail -= ch->num_queue_pairs;

        return 0;
}

/**
 * i40e_configure_queue_channels - Add queue channel for the given TCs
 * @vsi: VSI to be configured
 *
 * Configures queue channel mapping to the given TCs
 **/
static int i40e_configure_queue_channels(struct i40e_vsi *vsi)
{
        struct i40e_channel *ch;
        u64 max_rate = 0;
        int ret = 0, i;

        /* Create app vsi with the TCs. Main VSI with TC0 is already set up */
        vsi->tc_seid_map[0] = vsi->seid;
        for (i = 1; i < I40E_MAX_TRAFFIC_CLASS; i++) {
                if (vsi->tc_config.enabled_tc & BIT(i)) {
                        ch = kzalloc(sizeof(*ch), GFP_KERNEL);
                        if (!ch) {
                                ret = -ENOMEM;
                                goto err_free;
                        }

                        INIT_LIST_HEAD(&ch->list);
                        ch->num_queue_pairs =
                                vsi->tc_config.tc_info[i].qcount;
                        ch->base_queue =
                                vsi->tc_config.tc_info[i].qoffset;

                        /* Bandwidth limit through tc interface is in bytes/s,
                         * change to Mbit/s
                         */
                        max_rate = vsi->mqprio_qopt.max_rate[i];
                        do_div(max_rate, I40E_BW_MBPS_DIVISOR);
                        ch->max_tx_rate = max_rate;

                        list_add_tail(&ch->list, &vsi->ch_list);

                        ret = i40e_create_queue_channel(vsi, ch);
                        if (ret) {
                                dev_err(&vsi->back->pdev->dev,
                                        "Failed creating queue channel with TC%d: queues %d\n",
                                        i, ch->num_queue_pairs);
                                goto err_free;
                        }
                        vsi->tc_seid_map[i] = ch->seid;
                }
        }

        /* reset to reconfigure TX queue contexts */
        i40e_do_reset(vsi->back, I40E_PF_RESET_FLAG, true);
        return ret;

err_free:
        i40e_remove_queue_channels(vsi);
        return ret;
}

/**
 * i40e_veb_config_tc - Configure TCs for given VEB
 * @veb: given VEB
 * @enabled_tc: TC bitmap
 *
 * Configures given TC bitmap for VEB (switching) element
 **/
int i40e_veb_config_tc(struct i40e_veb *veb, u8 enabled_tc)
{
        struct i40e_aqc_configure_switching_comp_bw_config_data bw_data = {0};
        struct i40e_pf *pf = veb->pf;
        int ret = 0;
        int i;

        /* No TCs or already enabled TCs just return */
        if (!enabled_tc || veb->enabled_tc == enabled_tc)
                return ret;

        bw_data.tc_valid_bits = enabled_tc;
        /* bw_data.absolute_credits is not set (relative) */

        /* Enable ETS TCs with equal BW Share for now */
        for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
                if (enabled_tc & BIT(i))
                        bw_data.tc_bw_share_credits[i] = 1;
        }

        ret = i40e_aq_config_switch_comp_bw_config(&pf->hw, veb->seid,
                                                   &bw_data, NULL);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "VEB bw config failed, err %pe aq_err %s\n",
                         ERR_PTR(ret),
                         i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
                goto out;
        }

        /* Update the BW information */
        ret = i40e_veb_get_bw_info(veb);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "Failed getting veb bw config, err %pe aq_err %s\n",
                         ERR_PTR(ret),
                         i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
        }

out:
        return ret;
}

#ifdef CONFIG_I40E_DCB
/**
 * i40e_dcb_reconfigure - Reconfigure all VEBs and VSIs
 * @pf: PF struct
 *
 * Reconfigure VEB/VSIs on a given PF; it is assumed that
 * the caller would've quiesce all the VSIs before calling
 * this function
 **/
static void i40e_dcb_reconfigure(struct i40e_pf *pf)
{
        struct i40e_vsi *vsi;
        struct i40e_veb *veb;
        u8 tc_map = 0;
        int ret;
        int v;

        /* Enable the TCs available on PF to all VEBs */
        tc_map = i40e_pf_get_tc_map(pf);
        if (tc_map == I40E_DEFAULT_TRAFFIC_CLASS)
                return;

        i40e_pf_for_each_veb(pf, v, veb) {
                ret = i40e_veb_config_tc(veb, tc_map);
                if (ret) {
                        dev_info(&pf->pdev->dev,
                                 "Failed configuring TC for VEB seid=%d\n",
                                 veb->seid);
                        /* Will try to configure as many components */
                }
        }

        /* Update each VSI */
        i40e_pf_for_each_vsi(pf, v, vsi) {
                /* - Enable all TCs for the LAN VSI
                 * - For all others keep them at TC0 for now
                 */
                if (vsi->type == I40E_VSI_MAIN)
                        tc_map = i40e_pf_get_tc_map(pf);
                else
                        tc_map = I40E_DEFAULT_TRAFFIC_CLASS;

                ret = i40e_vsi_config_tc(vsi, tc_map);
                if (ret) {
                        dev_info(&pf->pdev->dev,
                                 "Failed configuring TC for VSI seid=%d\n",
                                 vsi->seid);
                        /* Will try to configure as many components */
                } else {
                        /* Re-configure VSI vectors based on updated TC map */
                        i40e_vsi_map_rings_to_vectors(vsi);
                        if (vsi->netdev)
                                i40e_dcbnl_set_all(vsi);
                }
        }
}

/**
 * i40e_resume_port_tx - Resume port Tx
 * @pf: PF struct
 *
 * Resume a port's Tx and issue a PF reset in case of failure to
 * resume.
 **/
static int i40e_resume_port_tx(struct i40e_pf *pf)
{
        struct i40e_hw *hw = &pf->hw;
        int ret;

        ret = i40e_aq_resume_port_tx(hw, NULL);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "Resume Port Tx failed, err %pe aq_err %s\n",
                          ERR_PTR(ret),
                          i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
                /* Schedule PF reset to recover */
                set_bit(__I40E_PF_RESET_REQUESTED, pf->state);
                i40e_service_event_schedule(pf);
        }

        return ret;
}

/**
 * i40e_suspend_port_tx - Suspend port Tx
 * @pf: PF struct
 *
 * Suspend a port's Tx and issue a PF reset in case of failure.
 **/
static int i40e_suspend_port_tx(struct i40e_pf *pf)
{
        struct i40e_hw *hw = &pf->hw;
        int ret;

        ret = i40e_aq_suspend_port_tx(hw, pf->mac_seid, NULL);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "Suspend Port Tx failed, err %pe aq_err %s\n",
                         ERR_PTR(ret),
                         i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
                /* Schedule PF reset to recover */
                set_bit(__I40E_PF_RESET_REQUESTED, pf->state);
                i40e_service_event_schedule(pf);
        }

        return ret;
}

/**
 * i40e_hw_set_dcb_config - Program new DCBX settings into HW
 * @pf: PF being configured
 * @new_cfg: New DCBX configuration
 *
 * Program DCB settings into HW and reconfigure VEB/VSIs on
 * given PF. Uses "Set LLDP MIB" AQC to program the hardware.
 **/
static int i40e_hw_set_dcb_config(struct i40e_pf *pf,
                                  struct i40e_dcbx_config *new_cfg)
{
        struct i40e_dcbx_config *old_cfg = &pf->hw.local_dcbx_config;
        int ret;

        /* Check if need reconfiguration */
        if (!memcmp(&new_cfg, &old_cfg, sizeof(new_cfg))) {
                dev_dbg(&pf->pdev->dev, "No Change in DCB Config required.\n");
                return 0;
        }

        /* Config change disable all VSIs */
        i40e_pf_quiesce_all_vsi(pf);

        /* Copy the new config to the current config */
        *old_cfg = *new_cfg;
        old_cfg->etsrec = old_cfg->etscfg;
        ret = i40e_set_dcb_config(&pf->hw);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "Set DCB Config failed, err %pe aq_err %s\n",
                         ERR_PTR(ret),
                         i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
                goto out;
        }

        /* Changes in configuration update VEB/VSI */
        i40e_dcb_reconfigure(pf);
out:
        /* In case of reset do not try to resume anything */
        if (!test_bit(__I40E_RESET_RECOVERY_PENDING, pf->state)) {
                /* Re-start the VSIs if disabled */
                ret = i40e_resume_port_tx(pf);
                /* In case of error no point in resuming VSIs */
                if (ret)
                        goto err;
                i40e_pf_unquiesce_all_vsi(pf);
        }
err:
        return ret;
}

/**
 * i40e_hw_dcb_config - Program new DCBX settings into HW
 * @pf: PF being configured
 * @new_cfg: New DCBX configuration
 *
 * Program DCB settings into HW and reconfigure VEB/VSIs on
 * given PF
 **/
int i40e_hw_dcb_config(struct i40e_pf *pf, struct i40e_dcbx_config *new_cfg)
{
        struct i40e_aqc_configure_switching_comp_ets_data ets_data;
        u8 prio_type[I40E_MAX_TRAFFIC_CLASS] = {0};
        u32 mfs_tc[I40E_MAX_TRAFFIC_CLASS];
        struct i40e_dcbx_config *old_cfg;
        u8 mode[I40E_MAX_TRAFFIC_CLASS];
        struct i40e_rx_pb_config pb_cfg;
        struct i40e_hw *hw = &pf->hw;
        u8 num_ports = hw->num_ports;
        bool need_reconfig;
        int ret = -EINVAL;
        u8 lltc_map = 0;
        u8 tc_map = 0;
        u8 new_numtc;
        u8 i;

        dev_dbg(&pf->pdev->dev, "Configuring DCB registers directly\n");
        /* Un-pack information to Program ETS HW via shared API
         * numtc, tcmap
         * LLTC map
         * ETS/NON-ETS arbiter mode
         * max exponent (credit refills)
         * Total number of ports
         * PFC priority bit-map
         * Priority Table
         * BW % per TC
         * Arbiter mode between UPs sharing same TC
         * TSA table (ETS or non-ETS)
         * EEE enabled or not
         * MFS TC table
         */

        new_numtc = i40e_dcb_get_num_tc(new_cfg);

        memset(&ets_data, 0, sizeof(ets_data));
        for (i = 0; i < new_numtc; i++) {
                tc_map |= BIT(i);
                switch (new_cfg->etscfg.tsatable[i]) {
                case I40E_IEEE_TSA_ETS:
                        prio_type[i] = I40E_DCB_PRIO_TYPE_ETS;
                        ets_data.tc_bw_share_credits[i] =
                                        new_cfg->etscfg.tcbwtable[i];
                        break;
                case I40E_IEEE_TSA_STRICT:
                        prio_type[i] = I40E_DCB_PRIO_TYPE_STRICT;
                        lltc_map |= BIT(i);
                        ets_data.tc_bw_share_credits[i] =
                                        I40E_DCB_STRICT_PRIO_CREDITS;
                        break;
                default:
                        /* Invalid TSA type */
                        need_reconfig = false;
                        goto out;
                }
        }

        old_cfg = &hw->local_dcbx_config;
        /* Check if need reconfiguration */
        need_reconfig = i40e_dcb_need_reconfig(pf, old_cfg, new_cfg);

        /* If needed, enable/disable frame tagging, disable all VSIs
         * and suspend port tx
         */
        if (need_reconfig) {
                /* Enable DCB tagging only when more than one TC */
                if (new_numtc > 1)
                        set_bit(I40E_FLAG_DCB_ENA, pf->flags);
                else
                        clear_bit(I40E_FLAG_DCB_ENA, pf->flags);

                set_bit(__I40E_PORT_SUSPENDED, pf->state);
                /* Reconfiguration needed quiesce all VSIs */
                i40e_pf_quiesce_all_vsi(pf);
                ret = i40e_suspend_port_tx(pf);
                if (ret)
                        goto err;
        }

        /* Configure Port ETS Tx Scheduler */
        ets_data.tc_valid_bits = tc_map;
        ets_data.tc_strict_priority_flags = lltc_map;
        ret = i40e_aq_config_switch_comp_ets
                (hw, pf->mac_seid, &ets_data,
                 i40e_aqc_opc_modify_switching_comp_ets, NULL);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "Modify Port ETS failed, err %pe aq_err %s\n",
                         ERR_PTR(ret),
                         i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
                goto out;
        }

        /* Configure Rx ETS HW */
        memset(&mode, I40E_DCB_ARB_MODE_ROUND_ROBIN, sizeof(mode));
        i40e_dcb_hw_set_num_tc(hw, new_numtc);
        i40e_dcb_hw_rx_fifo_config(hw, I40E_DCB_ARB_MODE_ROUND_ROBIN,
                                   I40E_DCB_ARB_MODE_STRICT_PRIORITY,
                                   I40E_DCB_DEFAULT_MAX_EXPONENT,
                                   lltc_map);
        i40e_dcb_hw_rx_cmd_monitor_config(hw, new_numtc, num_ports);
        i40e_dcb_hw_rx_ets_bw_config(hw, new_cfg->etscfg.tcbwtable, mode,
                                     prio_type);
        i40e_dcb_hw_pfc_config(hw, new_cfg->pfc.pfcenable,
                               new_cfg->etscfg.prioritytable);
        i40e_dcb_hw_rx_up2tc_config(hw, new_cfg->etscfg.prioritytable);

        /* Configure Rx Packet Buffers in HW */
        for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
                struct i40e_vsi *main_vsi = i40e_pf_get_main_vsi(pf);

                mfs_tc[i] = main_vsi->netdev->mtu;
                mfs_tc[i] += I40E_PACKET_HDR_PAD;
        }

        i40e_dcb_hw_calculate_pool_sizes(hw, num_ports,
                                         false, new_cfg->pfc.pfcenable,
                                         mfs_tc, &pb_cfg);
        i40e_dcb_hw_rx_pb_config(hw, &pf->pb_cfg, &pb_cfg);

        /* Update the local Rx Packet buffer config */
        pf->pb_cfg = pb_cfg;

        /* Inform the FW about changes to DCB configuration */
        ret = i40e_aq_dcb_updated(&pf->hw, NULL);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "DCB Updated failed, err %pe aq_err %s\n",
                         ERR_PTR(ret),
                         i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
                goto out;
        }

        /* Update the port DCBx configuration */
        *old_cfg = *new_cfg;

        /* Changes in configuration update VEB/VSI */
        i40e_dcb_reconfigure(pf);
out:
        /* Re-start the VSIs if disabled */
        if (need_reconfig) {
                ret = i40e_resume_port_tx(pf);

                clear_bit(__I40E_PORT_SUSPENDED, pf->state);
                /* In case of error no point in resuming VSIs */
                if (ret)
                        goto err;

                /* Wait for the PF's queues to be disabled */
                ret = i40e_pf_wait_queues_disabled(pf);
                if (ret) {
                        /* Schedule PF reset to recover */
                        set_bit(__I40E_PF_RESET_REQUESTED, pf->state);
                        i40e_service_event_schedule(pf);
                        goto err;
                } else {
                        i40e_pf_unquiesce_all_vsi(pf);
                        set_bit(__I40E_CLIENT_SERVICE_REQUESTED, pf->state);
                        set_bit(__I40E_CLIENT_L2_CHANGE, pf->state);
                }
                /* registers are set, lets apply */
                if (test_bit(I40E_HW_CAP_USE_SET_LLDP_MIB, pf->hw.caps))
                        ret = i40e_hw_set_dcb_config(pf, new_cfg);
        }

err:
        return ret;
}

/**
 * i40e_dcb_sw_default_config - Set default DCB configuration when DCB in SW
 * @pf: PF being queried
 *
 * Set default DCB configuration in case DCB is to be done in SW.
 **/
int i40e_dcb_sw_default_config(struct i40e_pf *pf)
{
        struct i40e_dcbx_config *dcb_cfg = &pf->hw.local_dcbx_config;
        struct i40e_aqc_configure_switching_comp_ets_data ets_data;
        struct i40e_hw *hw = &pf->hw;
        int err;

        if (test_bit(I40E_HW_CAP_USE_SET_LLDP_MIB, pf->hw.caps)) {
                /* Update the local cached instance with TC0 ETS */
                memset(&pf->tmp_cfg, 0, sizeof(struct i40e_dcbx_config));
                pf->tmp_cfg.etscfg.willing = I40E_IEEE_DEFAULT_ETS_WILLING;
                pf->tmp_cfg.etscfg.maxtcs = 0;
                pf->tmp_cfg.etscfg.tcbwtable[0] = I40E_IEEE_DEFAULT_ETS_TCBW;
                pf->tmp_cfg.etscfg.tsatable[0] = I40E_IEEE_TSA_ETS;
                pf->tmp_cfg.pfc.willing = I40E_IEEE_DEFAULT_PFC_WILLING;
                pf->tmp_cfg.pfc.pfccap = I40E_MAX_TRAFFIC_CLASS;
                /* FW needs one App to configure HW */
                pf->tmp_cfg.numapps = I40E_IEEE_DEFAULT_NUM_APPS;
                pf->tmp_cfg.app[0].selector = I40E_APP_SEL_ETHTYPE;
                pf->tmp_cfg.app[0].priority = I40E_IEEE_DEFAULT_APP_PRIO;
                pf->tmp_cfg.app[0].protocolid = I40E_APP_PROTOID_FCOE;

                return i40e_hw_set_dcb_config(pf, &pf->tmp_cfg);
        }

        memset(&ets_data, 0, sizeof(ets_data));
        ets_data.tc_valid_bits = I40E_DEFAULT_TRAFFIC_CLASS; /* TC0 only */
        ets_data.tc_strict_priority_flags = 0; /* ETS */
        ets_data.tc_bw_share_credits[0] = I40E_IEEE_DEFAULT_ETS_TCBW; /* 100% to TC0 */

        /* Enable ETS on the Physical port */
        err = i40e_aq_config_switch_comp_ets
                (hw, pf->mac_seid, &ets_data,
                 i40e_aqc_opc_enable_switching_comp_ets, NULL);
        if (err) {
                dev_info(&pf->pdev->dev,
                         "Enable Port ETS failed, err %pe aq_err %s\n",
                         ERR_PTR(err),
                         i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
                err = -ENOENT;
                goto out;
        }

        /* Update the local cached instance with TC0 ETS */
        dcb_cfg->etscfg.willing = I40E_IEEE_DEFAULT_ETS_WILLING;
        dcb_cfg->etscfg.cbs = 0;
        dcb_cfg->etscfg.maxtcs = I40E_MAX_TRAFFIC_CLASS;
        dcb_cfg->etscfg.tcbwtable[0] = I40E_IEEE_DEFAULT_ETS_TCBW;

out:
        return err;
}

/**
 * i40e_init_pf_dcb - Initialize DCB configuration
 * @pf: PF being configured
 *
 * Query the current DCB configuration and cache it
 * in the hardware structure
 **/
static int i40e_init_pf_dcb(struct i40e_pf *pf)
{
        struct i40e_hw *hw = &pf->hw;
        int err;

        /* Do not enable DCB for SW1 and SW2 images even if the FW is capable
         * Also do not enable DCBx if FW LLDP agent is disabled
         */
        if (test_bit(I40E_HW_CAP_NO_DCB_SUPPORT, pf->hw.caps)) {
                dev_info(&pf->pdev->dev, "DCB is not supported.\n");
                err = -EOPNOTSUPP;
                goto out;
        }
        if (test_bit(I40E_FLAG_FW_LLDP_DIS, pf->flags)) {
                dev_info(&pf->pdev->dev, "FW LLDP is disabled, attempting SW DCB\n");
                err = i40e_dcb_sw_default_config(pf);
                if (err) {
                        dev_info(&pf->pdev->dev, "Could not initialize SW DCB\n");
                        goto out;
                }
                dev_info(&pf->pdev->dev, "SW DCB initialization succeeded.\n");
                pf->dcbx_cap = DCB_CAP_DCBX_HOST |
                               DCB_CAP_DCBX_VER_IEEE;
                /* at init capable but disabled */
                set_bit(I40E_FLAG_DCB_CAPABLE, pf->flags);
                clear_bit(I40E_FLAG_DCB_ENA, pf->flags);
                goto out;
        }
        err = i40e_init_dcb(hw, true);
        if (!err) {
                /* Device/Function is not DCBX capable */
                if ((!hw->func_caps.dcb) ||
                    (hw->dcbx_status == I40E_DCBX_STATUS_DISABLED)) {
                        dev_info(&pf->pdev->dev,
                                 "DCBX offload is not supported or is disabled for this PF.\n");
                } else {
                        /* When status is not DISABLED then DCBX in FW */
                        pf->dcbx_cap = DCB_CAP_DCBX_LLD_MANAGED |
                                       DCB_CAP_DCBX_VER_IEEE;

                        set_bit(I40E_FLAG_DCB_CAPABLE, pf->flags);
                        /* Enable DCB tagging only when more than one TC
                         * or explicitly disable if only one TC
                         */
                        if (i40e_dcb_get_num_tc(&hw->local_dcbx_config) > 1)
                                set_bit(I40E_FLAG_DCB_ENA, pf->flags);
                        else
                                clear_bit(I40E_FLAG_DCB_ENA, pf->flags);
                        dev_dbg(&pf->pdev->dev,
                                "DCBX offload is supported for this PF.\n");
                }
        } else if (pf->hw.aq.asq_last_status == I40E_AQ_RC_EPERM) {
                dev_info(&pf->pdev->dev, "FW LLDP disabled for this PF.\n");
                set_bit(I40E_FLAG_FW_LLDP_DIS, pf->flags);
        } else {
                dev_info(&pf->pdev->dev,
                         "Query for DCB configuration failed, err %pe aq_err %s\n",
                         ERR_PTR(err),
                         i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
        }

out:
        return err;
}
#endif /* CONFIG_I40E_DCB */

static void i40e_print_link_message_eee(struct i40e_vsi *vsi,
                                        const char *speed, const char *fc)
{
        struct ethtool_keee kedata;

        memzero_explicit(&kedata, sizeof(kedata));
        if (vsi->netdev->ethtool_ops->get_eee)
                vsi->netdev->ethtool_ops->get_eee(vsi->netdev, &kedata);

        if (!linkmode_empty(kedata.supported))
                netdev_info(vsi->netdev,
                            "NIC Link is Up, %sbps Full Duplex, Flow Control: %s, EEE: %s\n",
                            speed, fc,
                            kedata.eee_enabled ? "Enabled" : "Disabled");
        else
                netdev_info(vsi->netdev,
                            "NIC Link is Up, %sbps Full Duplex, Flow Control: %s\n",
                            speed, fc);
}

/**
 * i40e_print_link_message - print link up or down
 * @vsi: the VSI for which link needs a message
 * @isup: true of link is up, false otherwise
 */
void i40e_print_link_message(struct i40e_vsi *vsi, bool isup)
{
        enum i40e_aq_link_speed new_speed;
        struct i40e_pf *pf = vsi->back;
        char *speed = "Unknown";
        char *fc = "Unknown";
        char *fec = "";
        char *req_fec = "";
        char *an = "";

        if (isup)
                new_speed = pf->hw.phy.link_info.link_speed;
        else
                new_speed = I40E_LINK_SPEED_UNKNOWN;

        if ((vsi->current_isup == isup) && (vsi->current_speed == new_speed))
                return;
        vsi->current_isup = isup;
        vsi->current_speed = new_speed;
        if (!isup) {
                netdev_info(vsi->netdev, "NIC Link is Down\n");
                return;
        }

        /* Warn user if link speed on NPAR enabled partition is not at
         * least 10GB
         */
        if (pf->hw.func_caps.npar_enable &&
            (pf->hw.phy.link_info.link_speed == I40E_LINK_SPEED_1GB ||
             pf->hw.phy.link_info.link_speed == I40E_LINK_SPEED_100MB))
                netdev_warn(vsi->netdev,
                            "The partition detected link speed that is less than 10Gbps\n");

        switch (pf->hw.phy.link_info.link_speed) {
        case I40E_LINK_SPEED_40GB:
                speed = "40 G";
                break;
        case I40E_LINK_SPEED_20GB:
                speed = "20 G";
                break;
        case I40E_LINK_SPEED_25GB:
                speed = "25 G";
                break;
        case I40E_LINK_SPEED_10GB:
                speed = "10 G";
                break;
        case I40E_LINK_SPEED_5GB:
                speed = "5 G";
                break;
        case I40E_LINK_SPEED_2_5GB:
                speed = "2.5 G";
                break;
        case I40E_LINK_SPEED_1GB:
                speed = "1000 M";
                break;
        case I40E_LINK_SPEED_100MB:
                speed = "100 M";
                break;
        default:
                break;
        }

        switch (pf->hw.fc.current_mode) {
        case I40E_FC_FULL:
                fc = "RX/TX";
                break;
        case I40E_FC_TX_PAUSE:
                fc = "TX";
                break;
        case I40E_FC_RX_PAUSE:
                fc = "RX";
                break;
        default:
                fc = "None";
                break;
        }

        if (pf->hw.phy.link_info.link_speed == I40E_LINK_SPEED_25GB) {
                req_fec = "None";
                fec = "None";
                an = "False";

                if (pf->hw.phy.link_info.an_info & I40E_AQ_AN_COMPLETED)
                        an = "True";

                if (pf->hw.phy.link_info.fec_info &
                    I40E_AQ_CONFIG_FEC_KR_ENA)
                        fec = "CL74 FC-FEC/BASE-R";
                else if (pf->hw.phy.link_info.fec_info &
                         I40E_AQ_CONFIG_FEC_RS_ENA)
                        fec = "CL108 RS-FEC";

                /* 'CL108 RS-FEC' should be displayed when RS is requested, or
                 * both RS and FC are requested
                 */
                if (vsi->back->hw.phy.link_info.req_fec_info &
                    (I40E_AQ_REQUEST_FEC_KR | I40E_AQ_REQUEST_FEC_RS)) {
                        if (vsi->back->hw.phy.link_info.req_fec_info &
                            I40E_AQ_REQUEST_FEC_RS)
                                req_fec = "CL108 RS-FEC";
                        else
                                req_fec = "CL74 FC-FEC/BASE-R";
                }
                netdev_info(vsi->netdev,
                            "NIC Link is Up, %sbps Full Duplex, Requested FEC: %s, Negotiated FEC: %s, Autoneg: %s, Flow Control: %s\n",
                            speed, req_fec, fec, an, fc);
        } else if (pf->hw.device_id == I40E_DEV_ID_KX_X722) {
                req_fec = "None";
                fec = "None";
                an = "False";

                if (pf->hw.phy.link_info.an_info & I40E_AQ_AN_COMPLETED)
                        an = "True";

                if (pf->hw.phy.link_info.fec_info &
                    I40E_AQ_CONFIG_FEC_KR_ENA)
                        fec = "CL74 FC-FEC/BASE-R";

                if (pf->hw.phy.link_info.req_fec_info &
                    I40E_AQ_REQUEST_FEC_KR)
                        req_fec = "CL74 FC-FEC/BASE-R";

                netdev_info(vsi->netdev,
                            "NIC Link is Up, %sbps Full Duplex, Requested FEC: %s, Negotiated FEC: %s, Autoneg: %s, Flow Control: %s\n",
                            speed, req_fec, fec, an, fc);
        } else {
                i40e_print_link_message_eee(vsi, speed, fc);
        }

}

/**
 * i40e_up_complete - Finish the last steps of bringing up a connection
 * @vsi: the VSI being configured
 **/
static int i40e_up_complete(struct i40e_vsi *vsi)
{
        struct i40e_pf *pf = vsi->back;
        int err;

        if (test_bit(I40E_FLAG_MSIX_ENA, pf->flags))
                i40e_vsi_configure_msix(vsi);
        else
                i40e_configure_msi_and_legacy(vsi);

        /* start rings */
        err = i40e_vsi_start_rings(vsi);
        if (err)
                return err;

        clear_bit(__I40E_VSI_DOWN, vsi->state);
        i40e_napi_enable_all(vsi);
        i40e_vsi_enable_irq(vsi);

        if ((pf->hw.phy.link_info.link_info & I40E_AQ_LINK_UP) &&
            (vsi->netdev)) {
                i40e_print_link_message(vsi, true);
                netif_tx_start_all_queues(vsi->netdev);
                netif_carrier_on(vsi->netdev);
        }

        /* replay FDIR SB filters */
        if (vsi->type == I40E_VSI_FDIR) {
                /* reset fd counters */
                pf->fd_add_err = 0;
                pf->fd_atr_cnt = 0;
                i40e_fdir_filter_restore(vsi);
        }

        /* On the next run of the service_task, notify any clients of the new
         * opened netdev
         */
        set_bit(__I40E_CLIENT_SERVICE_REQUESTED, pf->state);
        i40e_service_event_schedule(pf);

        return 0;
}

/**
 * i40e_vsi_reinit_locked - Reset the VSI
 * @vsi: the VSI being configured
 *
 * Rebuild the ring structs after some configuration
 * has changed, e.g. MTU size.
 **/
static void i40e_vsi_reinit_locked(struct i40e_vsi *vsi)
{
        struct i40e_pf *pf = vsi->back;

        while (test_and_set_bit(__I40E_CONFIG_BUSY, pf->state))
                usleep_range(1000, 2000);
        i40e_down(vsi);

        i40e_up(vsi);
        clear_bit(__I40E_CONFIG_BUSY, pf->state);
}

/**
 * i40e_force_link_state - Force the link status
 * @pf: board private structure
 * @is_up: whether the link state should be forced up or down
 **/
static int i40e_force_link_state(struct i40e_pf *pf, bool is_up)
{
        struct i40e_aq_get_phy_abilities_resp abilities;
        struct i40e_aq_set_phy_config config = {0};
        bool non_zero_phy_type = is_up;
        struct i40e_hw *hw = &pf->hw;
        u64 mask;
        u8 speed;
        int err;

        /* Card might've been put in an unstable state by other drivers
         * and applications, which causes incorrect speed values being
         * set on startup. In order to clear speed registers, we call
         * get_phy_capabilities twice, once to get initial state of
         * available speeds, and once to get current PHY config.
         */
        err = i40e_aq_get_phy_capabilities(hw, false, true, &abilities,
                                           NULL);
        if (err) {
                dev_err(&pf->pdev->dev,
                        "failed to get phy cap., ret =  %pe last_status =  %s\n",
                        ERR_PTR(err),
                        i40e_aq_str(hw, hw->aq.asq_last_status));
                return err;
        }
        speed = abilities.link_speed;

        /* Get the current phy config */
        err = i40e_aq_get_phy_capabilities(hw, false, false, &abilities,
                                           NULL);
        if (err) {
                dev_err(&pf->pdev->dev,
                        "failed to get phy cap., ret =  %pe last_status =  %s\n",
                        ERR_PTR(err),
                        i40e_aq_str(hw, hw->aq.asq_last_status));
                return err;
        }

        /* If link needs to go up, but was not forced to go down,
         * and its speed values are OK, no need for a flap
         * if non_zero_phy_type was set, still need to force up
         */
        if (test_bit(I40E_FLAG_TOTAL_PORT_SHUTDOWN_ENA, pf->flags))
                non_zero_phy_type = true;
        else if (is_up && abilities.phy_type != 0 && abilities.link_speed != 0)
                return 0;

        /* To force link we need to set bits for all supported PHY types,
         * but there are now more than 32, so we need to split the bitmap
         * across two fields.
         */
        mask = I40E_PHY_TYPES_BITMASK;
        config.phy_type =
                non_zero_phy_type ? cpu_to_le32((u32)(mask & 0xffffffff)) : 0;
        config.phy_type_ext =
                non_zero_phy_type ? (u8)((mask >> 32) & 0xff) : 0;
        /* Copy the old settings, except of phy_type */
        config.abilities = abilities.abilities;
        if (test_bit(I40E_FLAG_TOTAL_PORT_SHUTDOWN_ENA, pf->flags)) {
                if (is_up)
                        config.abilities |= I40E_AQ_PHY_ENABLE_LINK;
                else
                        config.abilities &= ~(I40E_AQ_PHY_ENABLE_LINK);
        }
        if (abilities.link_speed != 0)
                config.link_speed = abilities.link_speed;
        else
                config.link_speed = speed;
        config.eee_capability = abilities.eee_capability;
        config.eeer = abilities.eeer_val;
        config.low_power_ctrl = abilities.d3_lpan;
        config.fec_config = abilities.fec_cfg_curr_mod_ext_info &
                            I40E_AQ_PHY_FEC_CONFIG_MASK;
        err = i40e_aq_set_phy_config(hw, &config, NULL);

        if (err) {
                dev_err(&pf->pdev->dev,
                        "set phy config ret =  %pe last_status =  %s\n",
                        ERR_PTR(err),
                        i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
                return err;
        }

        /* Update the link info */
        err = i40e_update_link_info(hw);
        if (err) {
                /* Wait a little bit (on 40G cards it sometimes takes a really
                 * long time for link to come back from the atomic reset)
                 * and try once more
                 */
                msleep(1000);
                i40e_update_link_info(hw);
        }

        i40e_aq_set_link_restart_an(hw, is_up, NULL);

        return 0;
}

/**
 * i40e_up - Bring the connection back up after being down
 * @vsi: the VSI being configured
 **/
int i40e_up(struct i40e_vsi *vsi)
{
        int err;

        if (vsi->type == I40E_VSI_MAIN &&
            (test_bit(I40E_FLAG_LINK_DOWN_ON_CLOSE_ENA, vsi->back->flags) ||
             test_bit(I40E_FLAG_TOTAL_PORT_SHUTDOWN_ENA, vsi->back->flags)))
                i40e_force_link_state(vsi->back, true);

        err = i40e_vsi_configure(vsi);
        if (!err)
                err = i40e_up_complete(vsi);

        return err;
}

/**
 * i40e_down - Shutdown the connection processing
 * @vsi: the VSI being stopped
 **/
void i40e_down(struct i40e_vsi *vsi)
{
        int i;

        /* It is assumed that the caller of this function
         * sets the vsi->state __I40E_VSI_DOWN bit.
         */
        if (vsi->netdev) {
                netif_carrier_off(vsi->netdev);
                netif_tx_disable(vsi->netdev);
        }
        i40e_vsi_disable_irq(vsi);
        i40e_vsi_stop_rings(vsi);
        if (vsi->type == I40E_VSI_MAIN &&
           (test_bit(I40E_FLAG_LINK_DOWN_ON_CLOSE_ENA, vsi->back->flags) ||
            test_bit(I40E_FLAG_TOTAL_PORT_SHUTDOWN_ENA, vsi->back->flags)))
                i40e_force_link_state(vsi->back, false);
        i40e_napi_disable_all(vsi);

        for (i = 0; i < vsi->num_queue_pairs; i++) {
                i40e_clean_tx_ring(vsi->tx_rings[i]);
                if (i40e_enabled_xdp_vsi(vsi)) {
                        /* Make sure that in-progress ndo_xdp_xmit and
                         * ndo_xsk_wakeup calls are completed.
                         */
                        synchronize_rcu();
                        i40e_clean_tx_ring(vsi->xdp_rings[i]);
                }
                i40e_clean_rx_ring(vsi->rx_rings[i]);
        }

}

/**
 * i40e_validate_mqprio_qopt- validate queue mapping info
 * @vsi: the VSI being configured
 * @mqprio_qopt: queue parametrs
 **/
static int i40e_validate_mqprio_qopt(struct i40e_vsi *vsi,
                                     struct tc_mqprio_qopt_offload *mqprio_qopt)
{
        u64 sum_max_rate = 0;
        u64 max_rate = 0;
        int i;

        if (mqprio_qopt->qopt.offset[0] != 0 ||
            mqprio_qopt->qopt.num_tc < 1 ||
            mqprio_qopt->qopt.num_tc > I40E_MAX_TRAFFIC_CLASS)
                return -EINVAL;
        for (i = 0; ; i++) {
                if (!mqprio_qopt->qopt.count[i])
                        return -EINVAL;
                if (mqprio_qopt->min_rate[i]) {
                        dev_err(&vsi->back->pdev->dev,
                                "Invalid min tx rate (greater than 0) specified\n");
                        return -EINVAL;
                }
                max_rate = mqprio_qopt->max_rate[i];
                do_div(max_rate, I40E_BW_MBPS_DIVISOR);
                sum_max_rate += max_rate;

                if (i >= mqprio_qopt->qopt.num_tc - 1)
                        break;
                if (mqprio_qopt->qopt.offset[i + 1] !=
                    (mqprio_qopt->qopt.offset[i] + mqprio_qopt->qopt.count[i]))
                        return -EINVAL;
        }
        if (vsi->num_queue_pairs <
            (mqprio_qopt->qopt.offset[i] + mqprio_qopt->qopt.count[i])) {
                dev_err(&vsi->back->pdev->dev,
                        "Failed to create traffic channel, insufficient number of queues.\n");
                return -EINVAL;
        }
        if (sum_max_rate > i40e_get_link_speed(vsi)) {
                dev_err(&vsi->back->pdev->dev,
                        "Invalid max tx rate specified\n");
                return -EINVAL;
        }
        return 0;
}

/**
 * i40e_vsi_set_default_tc_config - set default values for tc configuration
 * @vsi: the VSI being configured
 **/
static void i40e_vsi_set_default_tc_config(struct i40e_vsi *vsi)
{
        u16 qcount;
        int i;

        /* Only TC0 is enabled */
        vsi->tc_config.numtc = 1;
        vsi->tc_config.enabled_tc = 1;
        qcount = min_t(int, vsi->alloc_queue_pairs,
                       i40e_pf_get_max_q_per_tc(vsi->back));
        for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
                /* For the TC that is not enabled set the offset to default
                 * queue and allocate one queue for the given TC.
                 */
                vsi->tc_config.tc_info[i].qoffset = 0;
                if (i == 0)
                        vsi->tc_config.tc_info[i].qcount = qcount;
                else
                        vsi->tc_config.tc_info[i].qcount = 1;
                vsi->tc_config.tc_info[i].netdev_tc = 0;
        }
}

/**
 * i40e_del_macvlan_filter
 * @hw: pointer to the HW structure
 * @seid: seid of the channel VSI
 * @macaddr: the mac address to apply as a filter
 * @aq_err: store the admin Q error
 *
 * This function deletes a mac filter on the channel VSI which serves as the
 * macvlan. Returns 0 on success.
 **/
static int i40e_del_macvlan_filter(struct i40e_hw *hw, u16 seid,
                                   const u8 *macaddr, int *aq_err)
{
        struct i40e_aqc_remove_macvlan_element_data element;
        int status;

        memset(&element, 0, sizeof(element));
        ether_addr_copy(element.mac_addr, macaddr);
        element.vlan_tag = 0;
        element.flags = I40E_AQC_MACVLAN_DEL_PERFECT_MATCH;
        status = i40e_aq_remove_macvlan(hw, seid, &element, 1, NULL);
        *aq_err = hw->aq.asq_last_status;

        return status;
}

/**
 * i40e_add_macvlan_filter
 * @hw: pointer to the HW structure
 * @seid: seid of the channel VSI
 * @macaddr: the mac address to apply as a filter
 * @aq_err: store the admin Q error
 *
 * This function adds a mac filter on the channel VSI which serves as the
 * macvlan. Returns 0 on success.
 **/
static int i40e_add_macvlan_filter(struct i40e_hw *hw, u16 seid,
                                   const u8 *macaddr, int *aq_err)
{
        struct i40e_aqc_add_macvlan_element_data element;
        u16 cmd_flags = 0;
        int status;

        ether_addr_copy(element.mac_addr, macaddr);
        element.vlan_tag = 0;
        element.queue_number = 0;
        element.match_method = I40E_AQC_MM_ERR_NO_RES;
        cmd_flags |= I40E_AQC_MACVLAN_ADD_PERFECT_MATCH;
        element.flags = cpu_to_le16(cmd_flags);
        status = i40e_aq_add_macvlan(hw, seid, &element, 1, NULL);
        *aq_err = hw->aq.asq_last_status;

        return status;
}

/**
 * i40e_reset_ch_rings - Reset the queue contexts in a channel
 * @vsi: the VSI we want to access
 * @ch: the channel we want to access
 */
static void i40e_reset_ch_rings(struct i40e_vsi *vsi, struct i40e_channel *ch)
{
        struct i40e_ring *tx_ring, *rx_ring;
        u16 pf_q;
        int i;

        for (i = 0; i < ch->num_queue_pairs; i++) {
                pf_q = ch->base_queue + i;
                tx_ring = vsi->tx_rings[pf_q];
                tx_ring->ch = NULL;
                rx_ring = vsi->rx_rings[pf_q];
                rx_ring->ch = NULL;
        }
}

/**
 * i40e_free_macvlan_channels
 * @vsi: the VSI we want to access
 *
 * This function frees the Qs of the channel VSI from
 * the stack and also deletes the channel VSIs which
 * serve as macvlans.
 */
static void i40e_free_macvlan_channels(struct i40e_vsi *vsi)
{
        struct i40e_channel *ch, *ch_tmp;
        int ret;

        if (list_empty(&vsi->macvlan_list))
                return;

        list_for_each_entry_safe(ch, ch_tmp, &vsi->macvlan_list, list) {
                struct i40e_vsi *parent_vsi;

                if (i40e_is_channel_macvlan(ch)) {
                        i40e_reset_ch_rings(vsi, ch);
                        clear_bit(ch->fwd->bit_no, vsi->fwd_bitmask);
                        netdev_unbind_sb_channel(vsi->netdev, ch->fwd->netdev);
                        netdev_set_sb_channel(ch->fwd->netdev, 0);
                        kfree(ch->fwd);
                        ch->fwd = NULL;
                }

                list_del(&ch->list);
                parent_vsi = ch->parent_vsi;
                if (!parent_vsi || !ch->initialized) {
                        kfree(ch);
                        continue;
                }

                /* remove the VSI */
                ret = i40e_aq_delete_element(&vsi->back->hw, ch->seid,
                                             NULL);
                if (ret)
                        dev_err(&vsi->back->pdev->dev,
                                "unable to remove channel (%d) for parent VSI(%d)\n",
                                ch->seid, parent_vsi->seid);
                kfree(ch);
        }
        vsi->macvlan_cnt = 0;
}

/**
 * i40e_fwd_ring_up - bring the macvlan device up
 * @vsi: the VSI we want to access
 * @vdev: macvlan netdevice
 * @fwd: the private fwd structure
 */
static int i40e_fwd_ring_up(struct i40e_vsi *vsi, struct net_device *vdev,
                            struct i40e_fwd_adapter *fwd)
{
        struct i40e_channel *ch = NULL, *ch_tmp, *iter;
        int ret = 0, num_tc = 1,  i, aq_err;
        struct i40e_pf *pf = vsi->back;
        struct i40e_hw *hw = &pf->hw;

        /* Go through the list and find an available channel */
        list_for_each_entry_safe(iter, ch_tmp, &vsi->macvlan_list, list) {
                if (!i40e_is_channel_macvlan(iter)) {
                        iter->fwd = fwd;
                        /* record configuration for macvlan interface in vdev */
                        for (i = 0; i < num_tc; i++)
                                netdev_bind_sb_channel_queue(vsi->netdev, vdev,
                                                             i,
                                                             iter->num_queue_pairs,
                                                             iter->base_queue);
                        for (i = 0; i < iter->num_queue_pairs; i++) {
                                struct i40e_ring *tx_ring, *rx_ring;
                                u16 pf_q;

                                pf_q = iter->base_queue + i;

                                /* Get to TX ring ptr */
                                tx_ring = vsi->tx_rings[pf_q];
                                tx_ring->ch = iter;

                                /* Get the RX ring ptr */
                                rx_ring = vsi->rx_rings[pf_q];
                                rx_ring->ch = iter;
                        }
                        ch = iter;
                        break;
                }
        }

        if (!ch)
                return -EINVAL;

        /* Guarantee all rings are updated before we update the
         * MAC address filter.
         */
        wmb();

        /* Add a mac filter */
        ret = i40e_add_macvlan_filter(hw, ch->seid, vdev->dev_addr, &aq_err);
        if (ret) {
                /* if we cannot add the MAC rule then disable the offload */
                macvlan_release_l2fw_offload(vdev);
                for (i = 0; i < ch->num_queue_pairs; i++) {
                        struct i40e_ring *rx_ring;
                        u16 pf_q;

                        pf_q = ch->base_queue + i;
                        rx_ring = vsi->rx_rings[pf_q];
                        rx_ring->netdev = NULL;
                }
                dev_info(&pf->pdev->dev,
                         "Error adding mac filter on macvlan err %pe, aq_err %s\n",
                          ERR_PTR(ret),
                          i40e_aq_str(hw, aq_err));
                netdev_err(vdev, "L2fwd offload disabled to L2 filter error\n");
        }

        return ret;
}

/**
 * i40e_setup_macvlans - create the channels which will be macvlans
 * @vsi: the VSI we want to access
 * @macvlan_cnt: no. of macvlans to be setup
 * @qcnt: no. of Qs per macvlan
 * @vdev: macvlan netdevice
 */
static int i40e_setup_macvlans(struct i40e_vsi *vsi, u16 macvlan_cnt, u16 qcnt,
                               struct net_device *vdev)
{
        struct i40e_pf *pf = vsi->back;
        struct i40e_hw *hw = &pf->hw;
        struct i40e_vsi_context ctxt;
        u16 sections, qmap, num_qps;
        struct i40e_channel *ch;
        int i, pow, ret = 0;
        u8 offset = 0;

        if (vsi->type != I40E_VSI_MAIN || !macvlan_cnt)
                return -EINVAL;

        num_qps = vsi->num_queue_pairs - (macvlan_cnt * qcnt);

        /* find the next higher power-of-2 of num queue pairs */
        pow = fls(roundup_pow_of_two(num_qps) - 1);

        qmap = (offset << I40E_AQ_VSI_TC_QUE_OFFSET_SHIFT) |
                (pow << I40E_AQ_VSI_TC_QUE_NUMBER_SHIFT);

        /* Setup context bits for the main VSI */
        sections = I40E_AQ_VSI_PROP_QUEUE_MAP_VALID;
        sections |= I40E_AQ_VSI_PROP_SCHED_VALID;
        memset(&ctxt, 0, sizeof(ctxt));
        ctxt.seid = vsi->seid;
        ctxt.pf_num = vsi->back->hw.pf_id;
        ctxt.vf_num = 0;
        ctxt.uplink_seid = vsi->uplink_seid;
        ctxt.info = vsi->info;
        ctxt.info.tc_mapping[0] = cpu_to_le16(qmap);
        ctxt.info.mapping_flags |= cpu_to_le16(I40E_AQ_VSI_QUE_MAP_CONTIG);
        ctxt.info.queue_mapping[0] = cpu_to_le16(vsi->base_queue);
        ctxt.info.valid_sections |= cpu_to_le16(sections);

        /* Reconfigure RSS for main VSI with new max queue count */
        vsi->rss_size = max_t(u16, num_qps, qcnt);
        ret = i40e_vsi_config_rss(vsi);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "Failed to reconfig RSS for num_queues (%u)\n",
                         vsi->rss_size);
                return ret;
        }
        vsi->reconfig_rss = true;
        dev_dbg(&vsi->back->pdev->dev,
                "Reconfigured RSS with num_queues (%u)\n", vsi->rss_size);
        vsi->next_base_queue = num_qps;
        vsi->cnt_q_avail = vsi->num_queue_pairs - num_qps;

        /* Update the VSI after updating the VSI queue-mapping
         * information
         */
        ret = i40e_aq_update_vsi_params(hw, &ctxt, NULL);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "Update vsi tc config failed, err %pe aq_err %s\n",
                         ERR_PTR(ret),
                         i40e_aq_str(hw, hw->aq.asq_last_status));
                return ret;
        }
        /* update the local VSI info with updated queue map */
        i40e_vsi_update_queue_map(vsi, &ctxt);
        vsi->info.valid_sections = 0;

        /* Create channels for macvlans */
        INIT_LIST_HEAD(&vsi->macvlan_list);
        for (i = 0; i < macvlan_cnt; i++) {
                ch = kzalloc(sizeof(*ch), GFP_KERNEL);
                if (!ch) {
                        ret = -ENOMEM;
                        goto err_free;
                }
                INIT_LIST_HEAD(&ch->list);
                ch->num_queue_pairs = qcnt;
                if (!i40e_setup_channel(pf, vsi, ch)) {
                        ret = -EINVAL;
                        kfree(ch);
                        goto err_free;
                }
                ch->parent_vsi = vsi;
                vsi->cnt_q_avail -= ch->num_queue_pairs;
                vsi->macvlan_cnt++;
                list_add_tail(&ch->list, &vsi->macvlan_list);
        }

        return ret;

err_free:
        dev_info(&pf->pdev->dev, "Failed to setup macvlans\n");
        i40e_free_macvlan_channels(vsi);

        return ret;
}

/**
 * i40e_fwd_add - configure macvlans
 * @netdev: net device to configure
 * @vdev: macvlan netdevice
 **/
static void *i40e_fwd_add(struct net_device *netdev, struct net_device *vdev)
{
        struct i40e_netdev_priv *np = netdev_priv(netdev);
        u16 q_per_macvlan = 0, macvlan_cnt = 0, vectors;
        struct i40e_vsi *vsi = np->vsi;
        struct i40e_pf *pf = vsi->back;
        struct i40e_fwd_adapter *fwd;
        int avail_macvlan, ret;

        if (test_bit(I40E_FLAG_DCB_ENA, pf->flags)) {
                netdev_info(netdev, "Macvlans are not supported when DCB is enabled\n");
                return ERR_PTR(-EINVAL);
        }
        if (i40e_is_tc_mqprio_enabled(pf)) {
                netdev_info(netdev, "Macvlans are not supported when HW TC offload is on\n");
                return ERR_PTR(-EINVAL);
        }
        if (pf->num_lan_msix < I40E_MIN_MACVLAN_VECTORS) {
                netdev_info(netdev, "Not enough vectors available to support macvlans\n");
                return ERR_PTR(-EINVAL);
        }

        /* The macvlan device has to be a single Q device so that the
         * tc_to_txq field can be reused to pick the tx queue.
         */
        if (netif_is_multiqueue(vdev))
                return ERR_PTR(-ERANGE);

        if (!vsi->macvlan_cnt) {
                /* reserve bit 0 for the pf device */
                set_bit(0, vsi->fwd_bitmask);

                /* Try to reserve as many queues as possible for macvlans. First
                 * reserve 3/4th of max vectors, then half, then quarter and
                 * calculate Qs per macvlan as you go
                 */
                vectors = pf->num_lan_msix;
                if (vectors <= I40E_MAX_MACVLANS && vectors > 64) {
                        /* allocate 4 Qs per macvlan and 32 Qs to the PF*/
                        q_per_macvlan = 4;
                        macvlan_cnt = (vectors - 32) / 4;
                } else if (vectors <= 64 && vectors > 32) {
                        /* allocate 2 Qs per macvlan and 16 Qs to the PF*/
                        q_per_macvlan = 2;
                        macvlan_cnt = (vectors - 16) / 2;
                } else if (vectors <= 32 && vectors > 16) {
                        /* allocate 1 Q per macvlan and 16 Qs to the PF*/
                        q_per_macvlan = 1;
                        macvlan_cnt = vectors - 16;
                } else if (vectors <= 16 && vectors > 8) {
                        /* allocate 1 Q per macvlan and 8 Qs to the PF */
                        q_per_macvlan = 1;
                        macvlan_cnt = vectors - 8;
                } else {
                        /* allocate 1 Q per macvlan and 1 Q to the PF */
                        q_per_macvlan = 1;
                        macvlan_cnt = vectors - 1;
                }

                if (macvlan_cnt == 0)
                        return ERR_PTR(-EBUSY);

                /* Quiesce VSI queues */
                i40e_quiesce_vsi(vsi);

                /* sets up the macvlans but does not "enable" them */
                ret = i40e_setup_macvlans(vsi, macvlan_cnt, q_per_macvlan,
                                          vdev);
                if (ret)
                        return ERR_PTR(ret);

                /* Unquiesce VSI */
                i40e_unquiesce_vsi(vsi);
        }
        avail_macvlan = find_first_zero_bit(vsi->fwd_bitmask,
                                            vsi->macvlan_cnt);
        if (avail_macvlan >= I40E_MAX_MACVLANS)
                return ERR_PTR(-EBUSY);

        /* create the fwd struct */
        fwd = kzalloc(sizeof(*fwd), GFP_KERNEL);
        if (!fwd)
                return ERR_PTR(-ENOMEM);

        set_bit(avail_macvlan, vsi->fwd_bitmask);
        fwd->bit_no = avail_macvlan;
        netdev_set_sb_channel(vdev, avail_macvlan);
        fwd->netdev = vdev;

        if (!netif_running(netdev))
                return fwd;

        /* Set fwd ring up */
        ret = i40e_fwd_ring_up(vsi, vdev, fwd);
        if (ret) {
                /* unbind the queues and drop the subordinate channel config */
                netdev_unbind_sb_channel(netdev, vdev);
                netdev_set_sb_channel(vdev, 0);

                kfree(fwd);
                return ERR_PTR(-EINVAL);
        }

        return fwd;
}

/**
 * i40e_del_all_macvlans - Delete all the mac filters on the channels
 * @vsi: the VSI we want to access
 */
static void i40e_del_all_macvlans(struct i40e_vsi *vsi)
{
        struct i40e_channel *ch, *ch_tmp;
        struct i40e_pf *pf = vsi->back;
        struct i40e_hw *hw = &pf->hw;
        int aq_err, ret = 0;

        if (list_empty(&vsi->macvlan_list))
                return;

        list_for_each_entry_safe(ch, ch_tmp, &vsi->macvlan_list, list) {
                if (i40e_is_channel_macvlan(ch)) {
                        ret = i40e_del_macvlan_filter(hw, ch->seid,
                                                      i40e_channel_mac(ch),
                                                      &aq_err);
                        if (!ret) {
                                /* Reset queue contexts */
                                i40e_reset_ch_rings(vsi, ch);
                                clear_bit(ch->fwd->bit_no, vsi->fwd_bitmask);
                                netdev_unbind_sb_channel(vsi->netdev,
                                                         ch->fwd->netdev);
                                netdev_set_sb_channel(ch->fwd->netdev, 0);
                                kfree(ch->fwd);
                                ch->fwd = NULL;
                        }
                }
        }
}

/**
 * i40e_fwd_del - delete macvlan interfaces
 * @netdev: net device to configure
 * @vdev: macvlan netdevice
 */
static void i40e_fwd_del(struct net_device *netdev, void *vdev)
{
        struct i40e_netdev_priv *np = netdev_priv(netdev);
        struct i40e_fwd_adapter *fwd = vdev;
        struct i40e_channel *ch, *ch_tmp;
        struct i40e_vsi *vsi = np->vsi;
        struct i40e_pf *pf = vsi->back;
        struct i40e_hw *hw = &pf->hw;
        int aq_err, ret = 0;

        /* Find the channel associated with the macvlan and del mac filter */
        list_for_each_entry_safe(ch, ch_tmp, &vsi->macvlan_list, list) {
                if (i40e_is_channel_macvlan(ch) &&
                    ether_addr_equal(i40e_channel_mac(ch),
                                     fwd->netdev->dev_addr)) {
                        ret = i40e_del_macvlan_filter(hw, ch->seid,
                                                      i40e_channel_mac(ch),
                                                      &aq_err);
                        if (!ret) {
                                /* Reset queue contexts */
                                i40e_reset_ch_rings(vsi, ch);
                                clear_bit(ch->fwd->bit_no, vsi->fwd_bitmask);
                                netdev_unbind_sb_channel(netdev, fwd->netdev);
                                netdev_set_sb_channel(fwd->netdev, 0);
                                kfree(ch->fwd);
                                ch->fwd = NULL;
                        } else {
                                dev_info(&pf->pdev->dev,
                                         "Error deleting mac filter on macvlan err %pe, aq_err %s\n",
                                          ERR_PTR(ret),
                                          i40e_aq_str(hw, aq_err));
                        }
                        break;
                }
        }
}

/**
 * i40e_setup_tc - configure multiple traffic classes
 * @netdev: net device to configure
 * @type_data: tc offload data
 **/
static int i40e_setup_tc(struct net_device *netdev, void *type_data)
{
        struct tc_mqprio_qopt_offload *mqprio_qopt = type_data;
        struct i40e_netdev_priv *np = netdev_priv(netdev);
        struct i40e_vsi *vsi = np->vsi;
        struct i40e_pf *pf = vsi->back;
        u8 enabled_tc = 0, num_tc, hw;
        bool need_reset = false;
        int old_queue_pairs;
        int ret = -EINVAL;
        u16 mode;
        int i;

        old_queue_pairs = vsi->num_queue_pairs;
        num_tc = mqprio_qopt->qopt.num_tc;
        hw = mqprio_qopt->qopt.hw;
        mode = mqprio_qopt->mode;
        if (!hw) {
                clear_bit(I40E_FLAG_TC_MQPRIO_ENA, pf->flags);
                memcpy(&vsi->mqprio_qopt, mqprio_qopt, sizeof(*mqprio_qopt));
                goto config_tc;
        }

        /* Check if MFP enabled */
        if (test_bit(I40E_FLAG_MFP_ENA, pf->flags)) {
                netdev_info(netdev,
                            "Configuring TC not supported in MFP mode\n");
                return ret;
        }
        switch (mode) {
        case TC_MQPRIO_MODE_DCB:
                clear_bit(I40E_FLAG_TC_MQPRIO_ENA, pf->flags);

                /* Check if DCB enabled to continue */
                if (!test_bit(I40E_FLAG_DCB_ENA, pf->flags)) {
                        netdev_info(netdev,
                                    "DCB is not enabled for adapter\n");
                        return ret;
                }

                /* Check whether tc count is within enabled limit */
                if (num_tc > i40e_pf_get_num_tc(pf)) {
                        netdev_info(netdev,
                                    "TC count greater than enabled on link for adapter\n");
                        return ret;
                }
                break;
        case TC_MQPRIO_MODE_CHANNEL:
                if (test_bit(I40E_FLAG_DCB_ENA, pf->flags)) {
                        netdev_info(netdev,
                                    "Full offload of TC Mqprio options is not supported when DCB is enabled\n");
                        return ret;
                }
                if (!test_bit(I40E_FLAG_MSIX_ENA, pf->flags))
                        return ret;
                ret = i40e_validate_mqprio_qopt(vsi, mqprio_qopt);
                if (ret)
                        return ret;
                memcpy(&vsi->mqprio_qopt, mqprio_qopt,
                       sizeof(*mqprio_qopt));
                set_bit(I40E_FLAG_TC_MQPRIO_ENA, pf->flags);
                clear_bit(I40E_FLAG_DCB_ENA, pf->flags);
                break;
        default:
                return -EINVAL;
        }

config_tc:
        /* Generate TC map for number of tc requested */
        for (i = 0; i < num_tc; i++)
                enabled_tc |= BIT(i);

        /* Requesting same TC configuration as already enabled */
        if (enabled_tc == vsi->tc_config.enabled_tc &&
            mode != TC_MQPRIO_MODE_CHANNEL)
                return 0;

        /* Quiesce VSI queues */
        i40e_quiesce_vsi(vsi);

        if (!hw && !i40e_is_tc_mqprio_enabled(pf))
                i40e_remove_queue_channels(vsi);

        /* Configure VSI for enabled TCs */
        ret = i40e_vsi_config_tc(vsi, enabled_tc);
        if (ret) {
                netdev_info(netdev, "Failed configuring TC for VSI seid=%d\n",
                            vsi->seid);
                need_reset = true;
                goto exit;
        } else if (enabled_tc &&
                   (!is_power_of_2(vsi->tc_config.tc_info[0].qcount))) {
                netdev_info(netdev,
                            "Failed to create channel. Override queues (%u) not power of 2\n",
                            vsi->tc_config.tc_info[0].qcount);
                ret = -EINVAL;
                need_reset = true;
                goto exit;
        }

        dev_info(&vsi->back->pdev->dev,
                 "Setup channel (id:%u) utilizing num_queues %d\n",
                 vsi->seid, vsi->tc_config.tc_info[0].qcount);

        if (i40e_is_tc_mqprio_enabled(pf)) {
                if (vsi->mqprio_qopt.max_rate[0]) {
                        u64 max_tx_rate = i40e_bw_bytes_to_mbits(vsi,
                                                  vsi->mqprio_qopt.max_rate[0]);

                        ret = i40e_set_bw_limit(vsi, vsi->seid, max_tx_rate);
                        if (!ret) {
                                u64 credits = max_tx_rate;

                                do_div(credits, I40E_BW_CREDIT_DIVISOR);
                                dev_dbg(&vsi->back->pdev->dev,
                                        "Set tx rate of %llu Mbps (count of 50Mbps %llu) for vsi->seid %u\n",
                                        max_tx_rate,
                                        credits,
                                        vsi->seid);
                        } else {
                                need_reset = true;
                                goto exit;
                        }
                }
                ret = i40e_configure_queue_channels(vsi);
                if (ret) {
                        vsi->num_queue_pairs = old_queue_pairs;
                        netdev_info(netdev,
                                    "Failed configuring queue channels\n");
                        need_reset = true;
                        goto exit;
                }
        }

exit:
        /* Reset the configuration data to defaults, only TC0 is enabled */
        if (need_reset) {
                i40e_vsi_set_default_tc_config(vsi);
                need_reset = false;
        }

        /* Unquiesce VSI */
        i40e_unquiesce_vsi(vsi);
        return ret;
}

/**
 * i40e_set_cld_element - sets cloud filter element data
 * @filter: cloud filter rule
 * @cld: ptr to cloud filter element data
 *
 * This is helper function to copy data into cloud filter element
 **/
static inline void
i40e_set_cld_element(struct i40e_cloud_filter *filter,
                     struct i40e_aqc_cloud_filters_element_data *cld)
{
        u32 ipa;
        int i;

        memset(cld, 0, sizeof(*cld));
        ether_addr_copy(cld->outer_mac, filter->dst_mac);
        ether_addr_copy(cld->inner_mac, filter->src_mac);

        if (filter->n_proto != ETH_P_IP && filter->n_proto != ETH_P_IPV6)
                return;

        if (filter->n_proto == ETH_P_IPV6) {
#define IPV6_MAX_INDEX  (ARRAY_SIZE(filter->dst_ipv6) - 1)
                for (i = 0; i < ARRAY_SIZE(filter->dst_ipv6); i++) {
                        ipa = be32_to_cpu(filter->dst_ipv6[IPV6_MAX_INDEX - i]);

                        *(__le32 *)&cld->ipaddr.raw_v6.data[i * 2] = cpu_to_le32(ipa);
                }
        } else {
                ipa = be32_to_cpu(filter->dst_ipv4);

                memcpy(&cld->ipaddr.v4.data, &ipa, sizeof(ipa));
        }

        cld->inner_vlan = cpu_to_le16(ntohs(filter->vlan_id));

        /* tenant_id is not supported by FW now, once the support is enabled
         * fill the cld->tenant_id with cpu_to_le32(filter->tenant_id)
         */
        if (filter->tenant_id)
                return;
}

/**
 * i40e_add_del_cloud_filter - Add/del cloud filter
 * @vsi: pointer to VSI
 * @filter: cloud filter rule
 * @add: if true, add, if false, delete
 *
 * Add or delete a cloud filter for a specific flow spec.
 * Returns 0 if the filter were successfully added.
 **/
int i40e_add_del_cloud_filter(struct i40e_vsi *vsi,
                              struct i40e_cloud_filter *filter, bool add)
{
        struct i40e_aqc_cloud_filters_element_data cld_filter;
        struct i40e_pf *pf = vsi->back;
        int ret;
        static const u16 flag_table[128] = {
                [I40E_CLOUD_FILTER_FLAGS_OMAC]  =
                        I40E_AQC_ADD_CLOUD_FILTER_OMAC,
                [I40E_CLOUD_FILTER_FLAGS_IMAC]  =
                        I40E_AQC_ADD_CLOUD_FILTER_IMAC,
                [I40E_CLOUD_FILTER_FLAGS_IMAC_IVLAN]  =
                        I40E_AQC_ADD_CLOUD_FILTER_IMAC_IVLAN,
                [I40E_CLOUD_FILTER_FLAGS_IMAC_TEN_ID] =
                        I40E_AQC_ADD_CLOUD_FILTER_IMAC_TEN_ID,
                [I40E_CLOUD_FILTER_FLAGS_OMAC_TEN_ID_IMAC] =
                        I40E_AQC_ADD_CLOUD_FILTER_OMAC_TEN_ID_IMAC,
                [I40E_CLOUD_FILTER_FLAGS_IMAC_IVLAN_TEN_ID] =
                        I40E_AQC_ADD_CLOUD_FILTER_IMAC_IVLAN_TEN_ID,
                [I40E_CLOUD_FILTER_FLAGS_IIP] =
                        I40E_AQC_ADD_CLOUD_FILTER_IIP,
        };

        if (filter->flags >= ARRAY_SIZE(flag_table))
                return -EIO;

        memset(&cld_filter, 0, sizeof(cld_filter));

        /* copy element needed to add cloud filter from filter */
        i40e_set_cld_element(filter, &cld_filter);

        if (filter->tunnel_type != I40E_CLOUD_TNL_TYPE_NONE)
                cld_filter.flags = cpu_to_le16(filter->tunnel_type <<
                                             I40E_AQC_ADD_CLOUD_TNL_TYPE_SHIFT);

        if (filter->n_proto == ETH_P_IPV6)
                cld_filter.flags |= cpu_to_le16(flag_table[filter->flags] |
                                                I40E_AQC_ADD_CLOUD_FLAGS_IPV6);
        else
                cld_filter.flags |= cpu_to_le16(flag_table[filter->flags] |
                                                I40E_AQC_ADD_CLOUD_FLAGS_IPV4);

        if (add)
                ret = i40e_aq_add_cloud_filters(&pf->hw, filter->seid,
                                                &cld_filter, 1);
        else
                ret = i40e_aq_rem_cloud_filters(&pf->hw, filter->seid,
                                                &cld_filter, 1);
        if (ret)
                dev_dbg(&pf->pdev->dev,
                        "Failed to %s cloud filter using l4 port %u, err %d aq_err %d\n",
                        add ? "add" : "delete", filter->dst_port, ret,
                        pf->hw.aq.asq_last_status);
        else
                dev_info(&pf->pdev->dev,
                         "%s cloud filter for VSI: %d\n",
                         add ? "Added" : "Deleted", filter->seid);
        return ret;
}

/**
 * i40e_add_del_cloud_filter_big_buf - Add/del cloud filter using big_buf
 * @vsi: pointer to VSI
 * @filter: cloud filter rule
 * @add: if true, add, if false, delete
 *
 * Add or delete a cloud filter for a specific flow spec using big buffer.
 * Returns 0 if the filter were successfully added.
 **/
int i40e_add_del_cloud_filter_big_buf(struct i40e_vsi *vsi,
                                      struct i40e_cloud_filter *filter,
                                      bool add)
{
        struct i40e_aqc_cloud_filters_element_bb cld_filter;
        struct i40e_pf *pf = vsi->back;
        int ret;

        /* Both (src/dst) valid mac_addr are not supported */
        if ((is_valid_ether_addr(filter->dst_mac) &&
             is_valid_ether_addr(filter->src_mac)) ||
            (is_multicast_ether_addr(filter->dst_mac) &&
             is_multicast_ether_addr(filter->src_mac)))
                return -EOPNOTSUPP;

        /* Big buffer cloud filter needs 'L4 port' to be non-zero. Also, UDP
         * ports are not supported via big buffer now.
         */
        if (!filter->dst_port || filter->ip_proto == IPPROTO_UDP)
                return -EOPNOTSUPP;

        /* adding filter using src_port/src_ip is not supported at this stage */
        if (filter->src_port ||
            (filter->src_ipv4 && filter->n_proto != ETH_P_IPV6) ||
            !ipv6_addr_any(&filter->ip.v6.src_ip6))
                return -EOPNOTSUPP;

        memset(&cld_filter, 0, sizeof(cld_filter));

        /* copy element needed to add cloud filter from filter */
        i40e_set_cld_element(filter, &cld_filter.element);

        if (is_valid_ether_addr(filter->dst_mac) ||
            is_valid_ether_addr(filter->src_mac) ||
            is_multicast_ether_addr(filter->dst_mac) ||
            is_multicast_ether_addr(filter->src_mac)) {
                /* MAC + IP : unsupported mode */
                if (filter->dst_ipv4)
                        return -EOPNOTSUPP;

                /* since we validated that L4 port must be valid before
                 * we get here, start with respective "flags" value
                 * and update if vlan is present or not
                 */
                cld_filter.element.flags =
                        cpu_to_le16(I40E_AQC_ADD_CLOUD_FILTER_MAC_PORT);

                if (filter->vlan_id) {
                        cld_filter.element.flags =
                        cpu_to_le16(I40E_AQC_ADD_CLOUD_FILTER_MAC_VLAN_PORT);
                }

        } else if ((filter->dst_ipv4 && filter->n_proto != ETH_P_IPV6) ||
                   !ipv6_addr_any(&filter->ip.v6.dst_ip6)) {
                cld_filter.element.flags =
                                cpu_to_le16(I40E_AQC_ADD_CLOUD_FILTER_IP_PORT);
                if (filter->n_proto == ETH_P_IPV6)
                        cld_filter.element.flags |=
                                cpu_to_le16(I40E_AQC_ADD_CLOUD_FLAGS_IPV6);
                else
                        cld_filter.element.flags |=
                                cpu_to_le16(I40E_AQC_ADD_CLOUD_FLAGS_IPV4);
        } else {
                dev_err(&pf->pdev->dev,
                        "either mac or ip has to be valid for cloud filter\n");
                return -EINVAL;
        }

        /* Now copy L4 port in Byte 6..7 in general fields */
        cld_filter.general_fields[I40E_AQC_ADD_CLOUD_FV_FLU_0X16_WORD0] =
                                                be16_to_cpu(filter->dst_port);

        if (add) {
                /* Validate current device switch mode, change if necessary */
                ret = i40e_validate_and_set_switch_mode(vsi);
                if (ret) {
                        dev_err(&pf->pdev->dev,
                                "failed to set switch mode, ret %d\n",
                                ret);
                        return ret;
                }

                ret = i40e_aq_add_cloud_filters_bb(&pf->hw, filter->seid,
                                                   &cld_filter, 1);
        } else {
                ret = i40e_aq_rem_cloud_filters_bb(&pf->hw, filter->seid,
                                                   &cld_filter, 1);
        }

        if (ret)
                dev_dbg(&pf->pdev->dev,
                        "Failed to %s cloud filter(big buffer) err %d aq_err %d\n",
                        add ? "add" : "delete", ret, pf->hw.aq.asq_last_status);
        else
                dev_info(&pf->pdev->dev,
                         "%s cloud filter for VSI: %d, L4 port: %d\n",
                         add ? "add" : "delete", filter->seid,
                         ntohs(filter->dst_port));
        return ret;
}

/**
 * i40e_parse_cls_flower - Parse tc flower filters provided by kernel
 * @vsi: Pointer to VSI
 * @f: Pointer to struct flow_cls_offload
 * @filter: Pointer to cloud filter structure
 *
 **/
static int i40e_parse_cls_flower(struct i40e_vsi *vsi,
                                 struct flow_cls_offload *f,
                                 struct i40e_cloud_filter *filter)
{
        struct flow_rule *rule = flow_cls_offload_flow_rule(f);
        struct flow_dissector *dissector = rule->match.dissector;
        u16 n_proto_mask = 0, n_proto_key = 0, addr_type = 0;
        struct i40e_pf *pf = vsi->back;
        u8 field_flags = 0;

        if (dissector->used_keys &
            ~(BIT_ULL(FLOW_DISSECTOR_KEY_CONTROL) |
              BIT_ULL(FLOW_DISSECTOR_KEY_BASIC) |
              BIT_ULL(FLOW_DISSECTOR_KEY_ETH_ADDRS) |
              BIT_ULL(FLOW_DISSECTOR_KEY_VLAN) |
              BIT_ULL(FLOW_DISSECTOR_KEY_IPV4_ADDRS) |
              BIT_ULL(FLOW_DISSECTOR_KEY_IPV6_ADDRS) |
              BIT_ULL(FLOW_DISSECTOR_KEY_PORTS) |
              BIT_ULL(FLOW_DISSECTOR_KEY_ENC_KEYID))) {
                dev_err(&pf->pdev->dev, "Unsupported key used: 0x%llx\n",
                        dissector->used_keys);
                return -EOPNOTSUPP;
        }

        if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_KEYID)) {
                struct flow_match_enc_keyid match;

                flow_rule_match_enc_keyid(rule, &match);
                if (match.mask->keyid != 0)
                        field_flags |= I40E_CLOUD_FIELD_TEN_ID;

                filter->tenant_id = be32_to_cpu(match.key->keyid);
        }

        if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_BASIC)) {
                struct flow_match_basic match;

                flow_rule_match_basic(rule, &match);
                n_proto_key = ntohs(match.key->n_proto);
                n_proto_mask = ntohs(match.mask->n_proto);

                if (n_proto_key == ETH_P_ALL) {
                        n_proto_key = 0;
                        n_proto_mask = 0;
                }
                filter->n_proto = n_proto_key & n_proto_mask;
                filter->ip_proto = match.key->ip_proto;
        }

        if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ETH_ADDRS)) {
                struct flow_match_eth_addrs match;

                flow_rule_match_eth_addrs(rule, &match);

                /* use is_broadcast and is_zero to check for all 0xf or 0 */
                if (!is_zero_ether_addr(match.mask->dst)) {
                        if (is_broadcast_ether_addr(match.mask->dst)) {
                                field_flags |= I40E_CLOUD_FIELD_OMAC;
                        } else {
                                dev_err(&pf->pdev->dev, "Bad ether dest mask %pM\n",
                                        match.mask->dst);
                                return -EIO;
                        }
                }

                if (!is_zero_ether_addr(match.mask->src)) {
                        if (is_broadcast_ether_addr(match.mask->src)) {
                                field_flags |= I40E_CLOUD_FIELD_IMAC;
                        } else {
                                dev_err(&pf->pdev->dev, "Bad ether src mask %pM\n",
                                        match.mask->src);
                                return -EIO;
                        }
                }
                ether_addr_copy(filter->dst_mac, match.key->dst);
                ether_addr_copy(filter->src_mac, match.key->src);
        }

        if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_VLAN)) {
                struct flow_match_vlan match;

                flow_rule_match_vlan(rule, &match);
                if (match.mask->vlan_id) {
                        if (match.mask->vlan_id == VLAN_VID_MASK) {
                                field_flags |= I40E_CLOUD_FIELD_IVLAN;

                        } else {
                                dev_err(&pf->pdev->dev, "Bad vlan mask 0x%04x\n",
                                        match.mask->vlan_id);
                                return -EIO;
                        }
                }

                filter->vlan_id = cpu_to_be16(match.key->vlan_id);
        }

        if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_CONTROL)) {
                struct flow_match_control match;

                flow_rule_match_control(rule, &match);
                addr_type = match.key->addr_type;

                if (flow_rule_has_control_flags(match.mask->flags,
                                                f->common.extack))
                        return -EOPNOTSUPP;
        }

        if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) {
                struct flow_match_ipv4_addrs match;

                flow_rule_match_ipv4_addrs(rule, &match);
                if (match.mask->dst) {
                        if (match.mask->dst == cpu_to_be32(0xffffffff)) {
                                field_flags |= I40E_CLOUD_FIELD_IIP;
                        } else {
                                dev_err(&pf->pdev->dev, "Bad ip dst mask %pI4b\n",
                                        &match.mask->dst);
                                return -EIO;
                        }
                }

                if (match.mask->src) {
                        if (match.mask->src == cpu_to_be32(0xffffffff)) {
                                field_flags |= I40E_CLOUD_FIELD_IIP;
                        } else {
                                dev_err(&pf->pdev->dev, "Bad ip src mask %pI4b\n",
                                        &match.mask->src);
                                return -EIO;
                        }
                }

                if (field_flags & I40E_CLOUD_FIELD_TEN_ID) {
                        dev_err(&pf->pdev->dev, "Tenant id not allowed for ip filter\n");
                        return -EIO;
                }
                filter->dst_ipv4 = match.key->dst;
                filter->src_ipv4 = match.key->src;
        }

        if (addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS) {
                struct flow_match_ipv6_addrs match;

                flow_rule_match_ipv6_addrs(rule, &match);

                /* src and dest IPV6 address should not be LOOPBACK
                 * (0:0:0:0:0:0:0:1), which can be represented as ::1
                 */
                if (ipv6_addr_loopback(&match.key->dst) ||
                    ipv6_addr_loopback(&match.key->src)) {
                        dev_err(&pf->pdev->dev,
                                "Bad ipv6, addr is LOOPBACK\n");
                        return -EIO;
                }
                if (!ipv6_addr_any(&match.mask->dst) ||
                    !ipv6_addr_any(&match.mask->src))
                        field_flags |= I40E_CLOUD_FIELD_IIP;

                memcpy(&filter->src_ipv6, &match.key->src.s6_addr32,
                       sizeof(filter->src_ipv6));
                memcpy(&filter->dst_ipv6, &match.key->dst.s6_addr32,
                       sizeof(filter->dst_ipv6));
        }

        if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_PORTS)) {
                struct flow_match_ports match;

                flow_rule_match_ports(rule, &match);
                if (match.mask->src) {
                        if (match.mask->src == cpu_to_be16(0xffff)) {
                                field_flags |= I40E_CLOUD_FIELD_IIP;
                        } else {
                                dev_err(&pf->pdev->dev, "Bad src port mask 0x%04x\n",
                                        be16_to_cpu(match.mask->src));
                                return -EIO;
                        }
                }

                if (match.mask->dst) {
                        if (match.mask->dst == cpu_to_be16(0xffff)) {
                                field_flags |= I40E_CLOUD_FIELD_IIP;
                        } else {
                                dev_err(&pf->pdev->dev, "Bad dst port mask 0x%04x\n",
                                        be16_to_cpu(match.mask->dst));
                                return -EIO;
                        }
                }

                filter->dst_port = match.key->dst;
                filter->src_port = match.key->src;

                switch (filter->ip_proto) {
                case IPPROTO_TCP:
                case IPPROTO_UDP:
                        break;
                default:
                        dev_err(&pf->pdev->dev,
                                "Only UDP and TCP transport are supported\n");
                        return -EINVAL;
                }
        }
        filter->flags = field_flags;
        return 0;
}

/**
 * i40e_handle_tclass: Forward to a traffic class on the device
 * @vsi: Pointer to VSI
 * @tc: traffic class index on the device
 * @filter: Pointer to cloud filter structure
 *
 **/
static int i40e_handle_tclass(struct i40e_vsi *vsi, u32 tc,
                              struct i40e_cloud_filter *filter)
{
        struct i40e_channel *ch, *ch_tmp;

        /* direct to a traffic class on the same device */
        if (tc == 0) {
                filter->seid = vsi->seid;
                return 0;
        } else if (vsi->tc_config.enabled_tc & BIT(tc)) {
                if (!filter->dst_port) {
                        dev_err(&vsi->back->pdev->dev,
                                "Specify destination port to direct to traffic class that is not default\n");
                        return -EINVAL;
                }
                if (list_empty(&vsi->ch_list))
                        return -EINVAL;
                list_for_each_entry_safe(ch, ch_tmp, &vsi->ch_list,
                                         list) {
                        if (ch->seid == vsi->tc_seid_map[tc])
                                filter->seid = ch->seid;
                }
                return 0;
        }
        dev_err(&vsi->back->pdev->dev, "TC is not enabled\n");
        return -EINVAL;
}

/**
 * i40e_configure_clsflower - Configure tc flower filters
 * @vsi: Pointer to VSI
 * @cls_flower: Pointer to struct flow_cls_offload
 *
 **/
static int i40e_configure_clsflower(struct i40e_vsi *vsi,
                                    struct flow_cls_offload *cls_flower)
{
        int tc = tc_classid_to_hwtc(vsi->netdev, cls_flower->classid);
        struct i40e_cloud_filter *filter = NULL;
        struct i40e_pf *pf = vsi->back;
        int err = 0;

        if (tc < 0) {
                dev_err(&vsi->back->pdev->dev, "Invalid traffic class\n");
                return -EOPNOTSUPP;
        }

        if (!tc) {
                dev_err(&pf->pdev->dev, "Unable to add filter because of invalid destination");
                return -EINVAL;
        }

        if (test_bit(__I40E_RESET_RECOVERY_PENDING, pf->state) ||
            test_bit(__I40E_RESET_INTR_RECEIVED, pf->state))
                return -EBUSY;

        if (pf->fdir_pf_active_filters ||
            (!hlist_empty(&pf->fdir_filter_list))) {
                dev_err(&vsi->back->pdev->dev,
                        "Flow Director Sideband filters exists, turn ntuple off to configure cloud filters\n");
                return -EINVAL;
        }

        if (test_bit(I40E_FLAG_FD_SB_ENA, vsi->back->flags)) {
                dev_err(&vsi->back->pdev->dev,
                        "Disable Flow Director Sideband, configuring Cloud filters via tc-flower\n");
                clear_bit(I40E_FLAG_FD_SB_ENA, vsi->back->flags);
                clear_bit(I40E_FLAG_FD_SB_TO_CLOUD_FILTER, vsi->back->flags);
        }

        filter = kzalloc(sizeof(*filter), GFP_KERNEL);
        if (!filter)
                return -ENOMEM;

        filter->cookie = cls_flower->cookie;

        err = i40e_parse_cls_flower(vsi, cls_flower, filter);
        if (err < 0)
                goto err;

        err = i40e_handle_tclass(vsi, tc, filter);
        if (err < 0)
                goto err;

        /* Add cloud filter */
        if (filter->dst_port)
                err = i40e_add_del_cloud_filter_big_buf(vsi, filter, true);
        else
                err = i40e_add_del_cloud_filter(vsi, filter, true);

        if (err) {
                dev_err(&pf->pdev->dev, "Failed to add cloud filter, err %d\n",
                        err);
                goto err;
        }

        /* add filter to the ordered list */
        INIT_HLIST_NODE(&filter->cloud_node);

        hlist_add_head(&filter->cloud_node, &pf->cloud_filter_list);

        pf->num_cloud_filters++;

        return err;
err:
        kfree(filter);
        return err;
}

/**
 * i40e_find_cloud_filter - Find the could filter in the list
 * @vsi: Pointer to VSI
 * @cookie: filter specific cookie
 *
 **/
static struct i40e_cloud_filter *i40e_find_cloud_filter(struct i40e_vsi *vsi,
                                                        unsigned long *cookie)
{
        struct i40e_cloud_filter *filter = NULL;
        struct hlist_node *node2;

        hlist_for_each_entry_safe(filter, node2,
                                  &vsi->back->cloud_filter_list, cloud_node)
                if (!memcmp(cookie, &filter->cookie, sizeof(filter->cookie)))
                        return filter;
        return NULL;
}

/**
 * i40e_delete_clsflower - Remove tc flower filters
 * @vsi: Pointer to VSI
 * @cls_flower: Pointer to struct flow_cls_offload
 *
 **/
static int i40e_delete_clsflower(struct i40e_vsi *vsi,
                                 struct flow_cls_offload *cls_flower)
{
        struct i40e_cloud_filter *filter = NULL;
        struct i40e_pf *pf = vsi->back;
        int err = 0;

        filter = i40e_find_cloud_filter(vsi, &cls_flower->cookie);

        if (!filter)
                return -EINVAL;

        hash_del(&filter->cloud_node);

        if (filter->dst_port)
                err = i40e_add_del_cloud_filter_big_buf(vsi, filter, false);
        else
                err = i40e_add_del_cloud_filter(vsi, filter, false);

        kfree(filter);
        if (err) {
                dev_err(&pf->pdev->dev,
                        "Failed to delete cloud filter, err %pe\n",
                        ERR_PTR(err));
                return i40e_aq_rc_to_posix(err, pf->hw.aq.asq_last_status);
        }

        pf->num_cloud_filters--;
        if (!pf->num_cloud_filters)
                if (test_bit(I40E_FLAG_FD_SB_TO_CLOUD_FILTER, pf->flags) &&
                    !test_bit(I40E_FLAG_FD_SB_INACTIVE, pf->flags)) {
                        set_bit(I40E_FLAG_FD_SB_ENA, pf->flags);
                        clear_bit(I40E_FLAG_FD_SB_TO_CLOUD_FILTER, pf->flags);
                        clear_bit(I40E_FLAG_FD_SB_INACTIVE, pf->flags);
                }
        return 0;
}

/**
 * i40e_setup_tc_cls_flower - flower classifier offloads
 * @np: net device to configure
 * @cls_flower: offload data
 **/
static int i40e_setup_tc_cls_flower(struct i40e_netdev_priv *np,
                                    struct flow_cls_offload *cls_flower)
{
        struct i40e_vsi *vsi = np->vsi;

        switch (cls_flower->command) {
        case FLOW_CLS_REPLACE:
                return i40e_configure_clsflower(vsi, cls_flower);
        case FLOW_CLS_DESTROY:
                return i40e_delete_clsflower(vsi, cls_flower);
        case FLOW_CLS_STATS:
                return -EOPNOTSUPP;
        default:
                return -EOPNOTSUPP;
        }
}

static int i40e_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
                                  void *cb_priv)
{
        struct i40e_netdev_priv *np = cb_priv;

        if (!tc_cls_can_offload_and_chain0(np->vsi->netdev, type_data))
                return -EOPNOTSUPP;

        switch (type) {
        case TC_SETUP_CLSFLOWER:
                return i40e_setup_tc_cls_flower(np, type_data);

        default:
                return -EOPNOTSUPP;
        }
}

static LIST_HEAD(i40e_block_cb_list);

static int __i40e_setup_tc(struct net_device *netdev, enum tc_setup_type type,
                           void *type_data)
{
        struct i40e_netdev_priv *np = netdev_priv(netdev);

        switch (type) {
        case TC_SETUP_QDISC_MQPRIO:
                return i40e_setup_tc(netdev, type_data);
        case TC_SETUP_BLOCK:
                return flow_block_cb_setup_simple(type_data,
                                                  &i40e_block_cb_list,
                                                  i40e_setup_tc_block_cb,
                                                  np, np, true);
        default:
                return -EOPNOTSUPP;
        }
}

/**
 * i40e_open - Called when a network interface is made active
 * @netdev: network interface device structure
 *
 * The open entry point is called when a network interface is made
 * active by the system (IFF_UP).  At this point all resources needed
 * for transmit and receive operations are allocated, the interrupt
 * handler is registered with the OS, the netdev watchdog subtask is
 * enabled, and the stack is notified that the interface is ready.
 *
 * Returns 0 on success, negative value on failure
 **/
int i40e_open(struct net_device *netdev)
{
        struct i40e_netdev_priv *np = netdev_priv(netdev);
        struct i40e_vsi *vsi = np->vsi;
        struct i40e_pf *pf = vsi->back;
        int err;

        /* disallow open during test or if eeprom is broken */
        if (test_bit(__I40E_TESTING, pf->state) ||
            test_bit(__I40E_BAD_EEPROM, pf->state))
                return -EBUSY;

        netif_carrier_off(netdev);

        if (i40e_force_link_state(pf, true))
                return -EAGAIN;

        err = i40e_vsi_open(vsi);
        if (err)
                return err;

        /* configure global TSO hardware offload settings */
        wr32(&pf->hw, I40E_GLLAN_TSOMSK_F, be32_to_cpu(TCP_FLAG_PSH |
                                                       TCP_FLAG_FIN) >> 16);
        wr32(&pf->hw, I40E_GLLAN_TSOMSK_M, be32_to_cpu(TCP_FLAG_PSH |
                                                       TCP_FLAG_FIN |
                                                       TCP_FLAG_CWR) >> 16);
        wr32(&pf->hw, I40E_GLLAN_TSOMSK_L, be32_to_cpu(TCP_FLAG_CWR) >> 16);
        udp_tunnel_get_rx_info(netdev);

        return 0;
}

/**
 * i40e_netif_set_realnum_tx_rx_queues - Update number of tx/rx queues
 * @vsi: vsi structure
 *
 * This updates netdev's number of tx/rx queues
 *
 * Returns status of setting tx/rx queues
 **/
static int i40e_netif_set_realnum_tx_rx_queues(struct i40e_vsi *vsi)
{
        int ret;

        ret = netif_set_real_num_rx_queues(vsi->netdev,
                                           vsi->num_queue_pairs);
        if (ret)
                return ret;

        return netif_set_real_num_tx_queues(vsi->netdev,
                                            vsi->num_queue_pairs);
}

/**
 * i40e_vsi_open -
 * @vsi: the VSI to open
 *
 * Finish initialization of the VSI.
 *
 * Returns 0 on success, negative value on failure
 *
 * Note: expects to be called while under rtnl_lock()
 **/
int i40e_vsi_open(struct i40e_vsi *vsi)
{
        struct i40e_pf *pf = vsi->back;
        char int_name[I40E_INT_NAME_STR_LEN];
        int err;

        /* allocate descriptors */
        err = i40e_vsi_setup_tx_resources(vsi);
        if (err)
                goto err_setup_tx;
        err = i40e_vsi_setup_rx_resources(vsi);
        if (err)
                goto err_setup_rx;

        err = i40e_vsi_configure(vsi);
        if (err)
                goto err_setup_rx;

        if (vsi->netdev) {
                snprintf(int_name, sizeof(int_name) - 1, "%s-%s",
                         dev_driver_string(&pf->pdev->dev), vsi->netdev->name);
                err = i40e_vsi_request_irq(vsi, int_name);
                if (err)
                        goto err_setup_rx;

                /* Notify the stack of the actual queue counts. */
                err = i40e_netif_set_realnum_tx_rx_queues(vsi);
                if (err)
                        goto err_set_queues;

        } else if (vsi->type == I40E_VSI_FDIR) {
                snprintf(int_name, sizeof(int_name) - 1, "%s-%s:fdir",
                         dev_driver_string(&pf->pdev->dev),
                         dev_name(&pf->pdev->dev));
                err = i40e_vsi_request_irq(vsi, int_name);
                if (err)
                        goto err_setup_rx;

        } else {
                err = -EINVAL;
                goto err_setup_rx;
        }

        err = i40e_up_complete(vsi);
        if (err)
                goto err_up_complete;

        return 0;

err_up_complete:
        i40e_down(vsi);
err_set_queues:
        i40e_vsi_free_irq(vsi);
err_setup_rx:
        i40e_vsi_free_rx_resources(vsi);
err_setup_tx:
        i40e_vsi_free_tx_resources(vsi);
        if (vsi->type == I40E_VSI_MAIN)
                i40e_do_reset(pf, I40E_PF_RESET_FLAG, true);

        return err;
}

/**
 * i40e_fdir_filter_exit - Cleans up the Flow Director accounting
 * @pf: Pointer to PF
 *
 * This function destroys the hlist where all the Flow Director
 * filters were saved.
 **/
static void i40e_fdir_filter_exit(struct i40e_pf *pf)
{
        struct i40e_fdir_filter *filter;
        struct i40e_flex_pit *pit_entry, *tmp;
        struct hlist_node *node2;

        hlist_for_each_entry_safe(filter, node2,
                                  &pf->fdir_filter_list, fdir_node) {
                hlist_del(&filter->fdir_node);
                kfree(filter);
        }

        list_for_each_entry_safe(pit_entry, tmp, &pf->l3_flex_pit_list, list) {
                list_del(&pit_entry->list);
                kfree(pit_entry);
        }
        INIT_LIST_HEAD(&pf->l3_flex_pit_list);

        list_for_each_entry_safe(pit_entry, tmp, &pf->l4_flex_pit_list, list) {
                list_del(&pit_entry->list);
                kfree(pit_entry);
        }
        INIT_LIST_HEAD(&pf->l4_flex_pit_list);

        pf->fdir_pf_active_filters = 0;
        i40e_reset_fdir_filter_cnt(pf);

        /* Reprogram the default input set for TCP/IPv4 */
        i40e_write_fd_input_set(pf, I40E_FILTER_PCTYPE_NONF_IPV4_TCP,
                                I40E_L3_SRC_MASK | I40E_L3_DST_MASK |
                                I40E_L4_SRC_MASK | I40E_L4_DST_MASK);

        /* Reprogram the default input set for TCP/IPv6 */
        i40e_write_fd_input_set(pf, I40E_FILTER_PCTYPE_NONF_IPV6_TCP,
                                I40E_L3_V6_SRC_MASK | I40E_L3_V6_DST_MASK |
                                I40E_L4_SRC_MASK | I40E_L4_DST_MASK);

        /* Reprogram the default input set for UDP/IPv4 */
        i40e_write_fd_input_set(pf, I40E_FILTER_PCTYPE_NONF_IPV4_UDP,
                                I40E_L3_SRC_MASK | I40E_L3_DST_MASK |
                                I40E_L4_SRC_MASK | I40E_L4_DST_MASK);

        /* Reprogram the default input set for UDP/IPv6 */
        i40e_write_fd_input_set(pf, I40E_FILTER_PCTYPE_NONF_IPV6_UDP,
                                I40E_L3_V6_SRC_MASK | I40E_L3_V6_DST_MASK |
                                I40E_L4_SRC_MASK | I40E_L4_DST_MASK);

        /* Reprogram the default input set for SCTP/IPv4 */
        i40e_write_fd_input_set(pf, I40E_FILTER_PCTYPE_NONF_IPV4_SCTP,
                                I40E_L3_SRC_MASK | I40E_L3_DST_MASK |
                                I40E_L4_SRC_MASK | I40E_L4_DST_MASK);

        /* Reprogram the default input set for SCTP/IPv6 */
        i40e_write_fd_input_set(pf, I40E_FILTER_PCTYPE_NONF_IPV6_SCTP,
                                I40E_L3_V6_SRC_MASK | I40E_L3_V6_DST_MASK |
                                I40E_L4_SRC_MASK | I40E_L4_DST_MASK);

        /* Reprogram the default input set for Other/IPv4 */
        i40e_write_fd_input_set(pf, I40E_FILTER_PCTYPE_NONF_IPV4_OTHER,
                                I40E_L3_SRC_MASK | I40E_L3_DST_MASK);

        i40e_write_fd_input_set(pf, I40E_FILTER_PCTYPE_FRAG_IPV4,
                                I40E_L3_SRC_MASK | I40E_L3_DST_MASK);

        /* Reprogram the default input set for Other/IPv6 */
        i40e_write_fd_input_set(pf, I40E_FILTER_PCTYPE_NONF_IPV6_OTHER,
                                I40E_L3_SRC_MASK | I40E_L3_DST_MASK);

        i40e_write_fd_input_set(pf, I40E_FILTER_PCTYPE_FRAG_IPV6,
                                I40E_L3_SRC_MASK | I40E_L3_DST_MASK);
}

/**
 * i40e_cloud_filter_exit - Cleans up the cloud filters
 * @pf: Pointer to PF
 *
 * This function destroys the hlist where all the cloud filters
 * were saved.
 **/
static void i40e_cloud_filter_exit(struct i40e_pf *pf)
{
        struct i40e_cloud_filter *cfilter;
        struct hlist_node *node;

        hlist_for_each_entry_safe(cfilter, node,
                                  &pf->cloud_filter_list, cloud_node) {
                hlist_del(&cfilter->cloud_node);
                kfree(cfilter);
        }
        pf->num_cloud_filters = 0;

        if (test_bit(I40E_FLAG_FD_SB_TO_CLOUD_FILTER, pf->flags) &&
            !test_bit(I40E_FLAG_FD_SB_INACTIVE, pf->flags)) {
                set_bit(I40E_FLAG_FD_SB_ENA, pf->flags);
                clear_bit(I40E_FLAG_FD_SB_TO_CLOUD_FILTER, pf->flags);
                clear_bit(I40E_FLAG_FD_SB_INACTIVE, pf->flags);
        }
}

/**
 * i40e_close - Disables a network interface
 * @netdev: network interface device structure
 *
 * The close entry point is called when an interface is de-activated
 * by the OS.  The hardware is still under the driver's control, but
 * this netdev interface is disabled.
 *
 * Returns 0, this is not allowed to fail
 **/
int i40e_close(struct net_device *netdev)
{
        struct i40e_netdev_priv *np = netdev_priv(netdev);
        struct i40e_vsi *vsi = np->vsi;

        i40e_vsi_close(vsi);

        return 0;
}

/**
 * i40e_do_reset - Start a PF or Core Reset sequence
 * @pf: board private structure
 * @reset_flags: which reset is requested
 * @lock_acquired: indicates whether or not the lock has been acquired
 * before this function was called.
 *
 * The essential difference in resets is that the PF Reset
 * doesn't clear the packet buffers, doesn't reset the PE
 * firmware, and doesn't bother the other PFs on the chip.
 **/
void i40e_do_reset(struct i40e_pf *pf, u32 reset_flags, bool lock_acquired)
{
        struct i40e_vsi *vsi;
        u32 val;
        int i;

        /* do the biggest reset indicated */
        if (reset_flags & BIT_ULL(__I40E_GLOBAL_RESET_REQUESTED)) {

                /* Request a Global Reset
                 *
                 * This will start the chip's countdown to the actual full
                 * chip reset event, and a warning interrupt to be sent
                 * to all PFs, including the requestor.  Our handler
                 * for the warning interrupt will deal with the shutdown
                 * and recovery of the switch setup.
                 */
                dev_dbg(&pf->pdev->dev, "GlobalR requested\n");
                val = rd32(&pf->hw, I40E_GLGEN_RTRIG);
                val |= I40E_GLGEN_RTRIG_GLOBR_MASK;
                wr32(&pf->hw, I40E_GLGEN_RTRIG, val);

        } else if (reset_flags & BIT_ULL(__I40E_CORE_RESET_REQUESTED)) {

                /* Request a Core Reset
                 *
                 * Same as Global Reset, except does *not* include the MAC/PHY
                 */
                dev_dbg(&pf->pdev->dev, "CoreR requested\n");
                val = rd32(&pf->hw, I40E_GLGEN_RTRIG);
                val |= I40E_GLGEN_RTRIG_CORER_MASK;
                wr32(&pf->hw, I40E_GLGEN_RTRIG, val);
                i40e_flush(&pf->hw);

        } else if (reset_flags & I40E_PF_RESET_FLAG) {

                /* Request a PF Reset
                 *
                 * Resets only the PF-specific registers
                 *
                 * This goes directly to the tear-down and rebuild of
                 * the switch, since we need to do all the recovery as
                 * for the Core Reset.
                 */
                dev_dbg(&pf->pdev->dev, "PFR requested\n");
                i40e_handle_reset_warning(pf, lock_acquired);

        } else if (reset_flags & I40E_PF_RESET_AND_REBUILD_FLAG) {
                /* Request a PF Reset
                 *
                 * Resets PF and reinitializes PFs VSI.
                 */
                i40e_prep_for_reset(pf);
                i40e_reset_and_rebuild(pf, true, lock_acquired);
                dev_info(&pf->pdev->dev,
                         test_bit(I40E_FLAG_FW_LLDP_DIS, pf->flags) ?
                         "FW LLDP is disabled\n" :
                         "FW LLDP is enabled\n");

        } else if (reset_flags & BIT_ULL(__I40E_REINIT_REQUESTED)) {
                /* Find the VSI(s) that requested a re-init */
                dev_info(&pf->pdev->dev, "VSI reinit requested\n");

                i40e_pf_for_each_vsi(pf, i, vsi) {
                        if (test_and_clear_bit(__I40E_VSI_REINIT_REQUESTED,
                                               vsi->state))
                                i40e_vsi_reinit_locked(vsi);
                }
        } else if (reset_flags & BIT_ULL(__I40E_DOWN_REQUESTED)) {
                /* Find the VSI(s) that needs to be brought down */
                dev_info(&pf->pdev->dev, "VSI down requested\n");

                i40e_pf_for_each_vsi(pf, i, vsi) {
                        if (test_and_clear_bit(__I40E_VSI_DOWN_REQUESTED,
                                               vsi->state)) {
                                set_bit(__I40E_VSI_DOWN, vsi->state);
                                i40e_down(vsi);
                        }
                }
        } else {
                dev_info(&pf->pdev->dev,
                         "bad reset request 0x%08x\n", reset_flags);
        }
}

#ifdef CONFIG_I40E_DCB
/**
 * i40e_dcb_need_reconfig - Check if DCB needs reconfig
 * @pf: board private structure
 * @old_cfg: current DCB config
 * @new_cfg: new DCB config
 **/
bool i40e_dcb_need_reconfig(struct i40e_pf *pf,
                            struct i40e_dcbx_config *old_cfg,
                            struct i40e_dcbx_config *new_cfg)
{
        bool need_reconfig = false;

        /* Check if ETS configuration has changed */
        if (memcmp(&new_cfg->etscfg,
                   &old_cfg->etscfg,
                   sizeof(new_cfg->etscfg))) {
                /* If Priority Table has changed reconfig is needed */
                if (memcmp(&new_cfg->etscfg.prioritytable,
                           &old_cfg->etscfg.prioritytable,
                           sizeof(new_cfg->etscfg.prioritytable))) {
                        need_reconfig = true;
                        dev_dbg(&pf->pdev->dev, "ETS UP2TC changed.\n");
                }

                if (memcmp(&new_cfg->etscfg.tcbwtable,
                           &old_cfg->etscfg.tcbwtable,
                           sizeof(new_cfg->etscfg.tcbwtable)))
                        dev_dbg(&pf->pdev->dev, "ETS TC BW Table changed.\n");

                if (memcmp(&new_cfg->etscfg.tsatable,
                           &old_cfg->etscfg.tsatable,
                           sizeof(new_cfg->etscfg.tsatable)))
                        dev_dbg(&pf->pdev->dev, "ETS TSA Table changed.\n");
        }

        /* Check if PFC configuration has changed */
        if (memcmp(&new_cfg->pfc,
                   &old_cfg->pfc,
                   sizeof(new_cfg->pfc))) {
                need_reconfig = true;
                dev_dbg(&pf->pdev->dev, "PFC config change detected.\n");
        }

        /* Check if APP Table has changed */
        if (memcmp(&new_cfg->app,
                   &old_cfg->app,
                   sizeof(new_cfg->app))) {
                need_reconfig = true;
                dev_dbg(&pf->pdev->dev, "APP Table change detected.\n");
        }

        dev_dbg(&pf->pdev->dev, "dcb need_reconfig=%d\n", need_reconfig);
        return need_reconfig;
}

/**
 * i40e_handle_lldp_event - Handle LLDP Change MIB event
 * @pf: board private structure
 * @e: event info posted on ARQ
 **/
static int i40e_handle_lldp_event(struct i40e_pf *pf,
                                  struct i40e_arq_event_info *e)
{
        struct i40e_aqc_lldp_get_mib *mib =
                (struct i40e_aqc_lldp_get_mib *)&e->desc.params.raw;
        struct i40e_hw *hw = &pf->hw;
        struct i40e_dcbx_config tmp_dcbx_cfg;
        bool need_reconfig = false;
        int ret = 0;
        u8 type;

        /* X710-T*L 2.5G and 5G speeds don't support DCB */
        if (I40E_IS_X710TL_DEVICE(hw->device_id) &&
            (hw->phy.link_info.link_speed &
             ~(I40E_LINK_SPEED_2_5GB | I40E_LINK_SPEED_5GB)) &&
             !test_bit(I40E_FLAG_DCB_CAPABLE, pf->flags))
                /* let firmware decide if the DCB should be disabled */
                set_bit(I40E_FLAG_DCB_CAPABLE, pf->flags);

        /* Not DCB capable or capability disabled */
        if (!test_bit(I40E_FLAG_DCB_CAPABLE, pf->flags))
                return ret;

        /* Ignore if event is not for Nearest Bridge */
        type = ((mib->type >> I40E_AQ_LLDP_BRIDGE_TYPE_SHIFT)
                & I40E_AQ_LLDP_BRIDGE_TYPE_MASK);
        dev_dbg(&pf->pdev->dev, "LLDP event mib bridge type 0x%x\n", type);
        if (type != I40E_AQ_LLDP_BRIDGE_TYPE_NEAREST_BRIDGE)
                return ret;

        /* Check MIB Type and return if event for Remote MIB update */
        type = mib->type & I40E_AQ_LLDP_MIB_TYPE_MASK;
        dev_dbg(&pf->pdev->dev,
                "LLDP event mib type %s\n", type ? "remote" : "local");
        if (type == I40E_AQ_LLDP_MIB_REMOTE) {
                /* Update the remote cached instance and return */
                ret = i40e_aq_get_dcb_config(hw, I40E_AQ_LLDP_MIB_REMOTE,
                                I40E_AQ_LLDP_BRIDGE_TYPE_NEAREST_BRIDGE,
                                &hw->remote_dcbx_config);
                goto exit;
        }

        /* Store the old configuration */
        tmp_dcbx_cfg = hw->local_dcbx_config;

        /* Reset the old DCBx configuration data */
        memset(&hw->local_dcbx_config, 0, sizeof(hw->local_dcbx_config));
        /* Get updated DCBX data from firmware */
        ret = i40e_get_dcb_config(&pf->hw);
        if (ret) {
                /* X710-T*L 2.5G and 5G speeds don't support DCB */
                if (I40E_IS_X710TL_DEVICE(hw->device_id) &&
                    (hw->phy.link_info.link_speed &
                     (I40E_LINK_SPEED_2_5GB | I40E_LINK_SPEED_5GB))) {
                        dev_warn(&pf->pdev->dev,
                                 "DCB is not supported for X710-T*L 2.5/5G speeds\n");
                        clear_bit(I40E_FLAG_DCB_CAPABLE, pf->flags);
                } else {
                        dev_info(&pf->pdev->dev,
                                 "Failed querying DCB configuration data from firmware, err %pe aq_err %s\n",
                                 ERR_PTR(ret),
                                 i40e_aq_str(&pf->hw,
                                             pf->hw.aq.asq_last_status));
                }
                goto exit;
        }

        /* No change detected in DCBX configs */
        if (!memcmp(&tmp_dcbx_cfg, &hw->local_dcbx_config,
                    sizeof(tmp_dcbx_cfg))) {
                dev_dbg(&pf->pdev->dev, "No change detected in DCBX configuration.\n");
                goto exit;
        }

        need_reconfig = i40e_dcb_need_reconfig(pf, &tmp_dcbx_cfg,
                                               &hw->local_dcbx_config);

        i40e_dcbnl_flush_apps(pf, &tmp_dcbx_cfg, &hw->local_dcbx_config);

        if (!need_reconfig)
                goto exit;

        /* Enable DCB tagging only when more than one TC */
        if (i40e_dcb_get_num_tc(&hw->local_dcbx_config) > 1)
                set_bit(I40E_FLAG_DCB_ENA, pf->flags);
        else
                clear_bit(I40E_FLAG_DCB_ENA, pf->flags);

        set_bit(__I40E_PORT_SUSPENDED, pf->state);
        /* Reconfiguration needed quiesce all VSIs */
        i40e_pf_quiesce_all_vsi(pf);

        /* Changes in configuration update VEB/VSI */
        i40e_dcb_reconfigure(pf);

        ret = i40e_resume_port_tx(pf);

        clear_bit(__I40E_PORT_SUSPENDED, pf->state);
        /* In case of error no point in resuming VSIs */
        if (ret)
                goto exit;

        /* Wait for the PF's queues to be disabled */
        ret = i40e_pf_wait_queues_disabled(pf);
        if (ret) {
                /* Schedule PF reset to recover */
                set_bit(__I40E_PF_RESET_REQUESTED, pf->state);
                i40e_service_event_schedule(pf);
        } else {
                i40e_pf_unquiesce_all_vsi(pf);
                set_bit(__I40E_CLIENT_SERVICE_REQUESTED, pf->state);
                set_bit(__I40E_CLIENT_L2_CHANGE, pf->state);
        }

exit:
        return ret;
}
#endif /* CONFIG_I40E_DCB */

/**
 * i40e_do_reset_safe - Protected reset path for userland calls.
 * @pf: board private structure
 * @reset_flags: which reset is requested
 *
 **/
void i40e_do_reset_safe(struct i40e_pf *pf, u32 reset_flags)
{
        rtnl_lock();
        i40e_do_reset(pf, reset_flags, true);
        rtnl_unlock();
}

/**
 * i40e_handle_lan_overflow_event - Handler for LAN queue overflow event
 * @pf: board private structure
 * @e: event info posted on ARQ
 *
 * Handler for LAN Queue Overflow Event generated by the firmware for PF
 * and VF queues
 **/
static void i40e_handle_lan_overflow_event(struct i40e_pf *pf,
                                           struct i40e_arq_event_info *e)
{
        struct i40e_aqc_lan_overflow *data =
                (struct i40e_aqc_lan_overflow *)&e->desc.params.raw;
        u32 queue = le32_to_cpu(data->prtdcb_rupto);
        u32 qtx_ctl = le32_to_cpu(data->otx_ctl);
        struct i40e_hw *hw = &pf->hw;
        struct i40e_vf *vf;
        u16 vf_id;

        dev_dbg(&pf->pdev->dev, "overflow Rx Queue Number = %d QTX_CTL=0x%08x\n",
                queue, qtx_ctl);

        if (FIELD_GET(I40E_QTX_CTL_PFVF_Q_MASK, qtx_ctl) !=
            I40E_QTX_CTL_VF_QUEUE)
                return;

        /* Queue belongs to VF, find the VF and issue VF reset */
        vf_id = FIELD_GET(I40E_QTX_CTL_VFVM_INDX_MASK, qtx_ctl);
        vf_id -= hw->func_caps.vf_base_id;
        vf = &pf->vf[vf_id];
        i40e_vc_notify_vf_reset(vf);
        /* Allow VF to process pending reset notification */
        msleep(20);
        i40e_reset_vf(vf, false);
}

/**
 * i40e_get_cur_guaranteed_fd_count - Get the consumed guaranteed FD filters
 * @pf: board private structure
 **/
u32 i40e_get_cur_guaranteed_fd_count(struct i40e_pf *pf)
{
        u32 val, fcnt_prog;

        val = rd32(&pf->hw, I40E_PFQF_FDSTAT);
        fcnt_prog = (val & I40E_PFQF_FDSTAT_GUARANT_CNT_MASK);
        return fcnt_prog;
}

/**
 * i40e_get_current_fd_count - Get total FD filters programmed for this PF
 * @pf: board private structure
 **/
u32 i40e_get_current_fd_count(struct i40e_pf *pf)
{
        u32 val, fcnt_prog;

        val = rd32(&pf->hw, I40E_PFQF_FDSTAT);
        fcnt_prog = (val & I40E_PFQF_FDSTAT_GUARANT_CNT_MASK) +
                    FIELD_GET(I40E_PFQF_FDSTAT_BEST_CNT_MASK, val);
        return fcnt_prog;
}

/**
 * i40e_get_global_fd_count - Get total FD filters programmed on device
 * @pf: board private structure
 **/
u32 i40e_get_global_fd_count(struct i40e_pf *pf)
{
        u32 val, fcnt_prog;

        val = rd32(&pf->hw, I40E_GLQF_FDCNT_0);
        fcnt_prog = (val & I40E_GLQF_FDCNT_0_GUARANT_CNT_MASK) +
                    FIELD_GET(I40E_GLQF_FDCNT_0_BESTCNT_MASK, val);
        return fcnt_prog;
}

/**
 * i40e_reenable_fdir_sb - Restore FDir SB capability
 * @pf: board private structure
 **/
static void i40e_reenable_fdir_sb(struct i40e_pf *pf)
{
        if (test_and_clear_bit(__I40E_FD_SB_AUTO_DISABLED, pf->state))
                if (test_bit(I40E_FLAG_FD_SB_ENA, pf->flags) &&
                    (I40E_DEBUG_FD & pf->hw.debug_mask))
                        dev_info(&pf->pdev->dev, "FD Sideband/ntuple is being enabled since we have space in the table now\n");
}

/**
 * i40e_reenable_fdir_atr - Restore FDir ATR capability
 * @pf: board private structure
 **/
static void i40e_reenable_fdir_atr(struct i40e_pf *pf)
{
        if (test_and_clear_bit(__I40E_FD_ATR_AUTO_DISABLED, pf->state)) {
                /* ATR uses the same filtering logic as SB rules. It only
                 * functions properly if the input set mask is at the default
                 * settings. It is safe to restore the default input set
                 * because there are no active TCPv4 filter rules.
                 */
                i40e_write_fd_input_set(pf, I40E_FILTER_PCTYPE_NONF_IPV4_TCP,
                                        I40E_L3_SRC_MASK | I40E_L3_DST_MASK |
                                        I40E_L4_SRC_MASK | I40E_L4_DST_MASK);

                if (test_bit(I40E_FLAG_FD_ATR_ENA, pf->flags) &&
                    (I40E_DEBUG_FD & pf->hw.debug_mask))
                        dev_info(&pf->pdev->dev, "ATR is being enabled since we have space in the table and there are no conflicting ntuple rules\n");
        }
}

/**
 * i40e_delete_invalid_filter - Delete an invalid FDIR filter
 * @pf: board private structure
 * @filter: FDir filter to remove
 */
static void i40e_delete_invalid_filter(struct i40e_pf *pf,
                                       struct i40e_fdir_filter *filter)
{
        /* Update counters */
        pf->fdir_pf_active_filters--;
        pf->fd_inv = 0;

        switch (filter->flow_type) {
        case TCP_V4_FLOW:
                pf->fd_tcp4_filter_cnt--;
                break;
        case UDP_V4_FLOW:
                pf->fd_udp4_filter_cnt--;
                break;
        case SCTP_V4_FLOW:
                pf->fd_sctp4_filter_cnt--;
                break;
        case TCP_V6_FLOW:
                pf->fd_tcp6_filter_cnt--;
                break;
        case UDP_V6_FLOW:
                pf->fd_udp6_filter_cnt--;
                break;
        case SCTP_V6_FLOW:
                pf->fd_udp6_filter_cnt--;
                break;
        case IP_USER_FLOW:
                switch (filter->ipl4_proto) {
                case IPPROTO_TCP:
                        pf->fd_tcp4_filter_cnt--;
                        break;
                case IPPROTO_UDP:
                        pf->fd_udp4_filter_cnt--;
                        break;
                case IPPROTO_SCTP:
                        pf->fd_sctp4_filter_cnt--;
                        break;
                case IPPROTO_IP:
                        pf->fd_ip4_filter_cnt--;
                        break;
                }
                break;
        case IPV6_USER_FLOW:
                switch (filter->ipl4_proto) {
                case IPPROTO_TCP:
                        pf->fd_tcp6_filter_cnt--;
                        break;
                case IPPROTO_UDP:
                        pf->fd_udp6_filter_cnt--;
                        break;
                case IPPROTO_SCTP:
                        pf->fd_sctp6_filter_cnt--;
                        break;
                case IPPROTO_IP:
                        pf->fd_ip6_filter_cnt--;
                        break;
                }
                break;
        }

        /* Remove the filter from the list and free memory */
        hlist_del(&filter->fdir_node);
        kfree(filter);
}

/**
 * i40e_fdir_check_and_reenable - Function to reenabe FD ATR or SB if disabled
 * @pf: board private structure
 **/
void i40e_fdir_check_and_reenable(struct i40e_pf *pf)
{
        struct i40e_fdir_filter *filter;
        u32 fcnt_prog, fcnt_avail;
        struct hlist_node *node;

        if (test_bit(__I40E_FD_FLUSH_REQUESTED, pf->state))
                return;

        /* Check if we have enough room to re-enable FDir SB capability. */
        fcnt_prog = i40e_get_global_fd_count(pf);
        fcnt_avail = pf->fdir_pf_filter_count;
        if ((fcnt_prog < (fcnt_avail - I40E_FDIR_BUFFER_HEAD_ROOM)) ||
            (pf->fd_add_err == 0) ||
            (i40e_get_current_atr_cnt(pf) < pf->fd_atr_cnt))
                i40e_reenable_fdir_sb(pf);

        /* We should wait for even more space before re-enabling ATR.
         * Additionally, we cannot enable ATR as long as we still have TCP SB
         * rules active.
         */
        if ((fcnt_prog < (fcnt_avail - I40E_FDIR_BUFFER_HEAD_ROOM_FOR_ATR)) &&
            pf->fd_tcp4_filter_cnt == 0 && pf->fd_tcp6_filter_cnt == 0)
                i40e_reenable_fdir_atr(pf);

        /* if hw had a problem adding a filter, delete it */
        if (pf->fd_inv > 0) {
                hlist_for_each_entry_safe(filter, node,
                                          &pf->fdir_filter_list, fdir_node)
                        if (filter->fd_id == pf->fd_inv)
                                i40e_delete_invalid_filter(pf, filter);
        }
}

#define I40E_MIN_FD_FLUSH_INTERVAL 10
#define I40E_MIN_FD_FLUSH_SB_ATR_UNSTABLE 30
/**
 * i40e_fdir_flush_and_replay - Function to flush all FD filters and replay SB
 * @pf: board private structure
 **/
static void i40e_fdir_flush_and_replay(struct i40e_pf *pf)
{
        unsigned long min_flush_time;
        int flush_wait_retry = 50;
        bool disable_atr = false;
        int fd_room;
        int reg;

        if (!time_after(jiffies, pf->fd_flush_timestamp +
                                 (I40E_MIN_FD_FLUSH_INTERVAL * HZ)))
                return;

        /* If the flush is happening too quick and we have mostly SB rules we
         * should not re-enable ATR for some time.
         */
        min_flush_time = pf->fd_flush_timestamp +
                         (I40E_MIN_FD_FLUSH_SB_ATR_UNSTABLE * HZ);
        fd_room = pf->fdir_pf_filter_count - pf->fdir_pf_active_filters;

        if (!(time_after(jiffies, min_flush_time)) &&
            (fd_room < I40E_FDIR_BUFFER_HEAD_ROOM_FOR_ATR)) {
                if (I40E_DEBUG_FD & pf->hw.debug_mask)
                        dev_info(&pf->pdev->dev, "ATR disabled, not enough FD filter space.\n");
                disable_atr = true;
        }

        pf->fd_flush_timestamp = jiffies;
        set_bit(__I40E_FD_ATR_AUTO_DISABLED, pf->state);
        /* flush all filters */
        wr32(&pf->hw, I40E_PFQF_CTL_1,
             I40E_PFQF_CTL_1_CLEARFDTABLE_MASK);
        i40e_flush(&pf->hw);
        pf->fd_flush_cnt++;
        pf->fd_add_err = 0;
        do {
                /* Check FD flush status every 5-6msec */
                usleep_range(5000, 6000);
                reg = rd32(&pf->hw, I40E_PFQF_CTL_1);
                if (!(reg & I40E_PFQF_CTL_1_CLEARFDTABLE_MASK))
                        break;
        } while (flush_wait_retry--);
        if (reg & I40E_PFQF_CTL_1_CLEARFDTABLE_MASK) {
                dev_warn(&pf->pdev->dev, "FD table did not flush, needs more time\n");
        } else {
                /* replay sideband filters */
                i40e_fdir_filter_restore(i40e_pf_get_main_vsi(pf));
                if (!disable_atr && !pf->fd_tcp4_filter_cnt)
                        clear_bit(__I40E_FD_ATR_AUTO_DISABLED, pf->state);
                clear_bit(__I40E_FD_FLUSH_REQUESTED, pf->state);
                if (I40E_DEBUG_FD & pf->hw.debug_mask)
                        dev_info(&pf->pdev->dev, "FD Filter table flushed and FD-SB replayed.\n");
        }
}

/**
 * i40e_get_current_atr_cnt - Get the count of total FD ATR filters programmed
 * @pf: board private structure
 **/
u32 i40e_get_current_atr_cnt(struct i40e_pf *pf)
{
        return i40e_get_current_fd_count(pf) - pf->fdir_pf_active_filters;
}

/**
 * i40e_fdir_reinit_subtask - Worker thread to reinit FDIR filter table
 * @pf: board private structure
 **/
static void i40e_fdir_reinit_subtask(struct i40e_pf *pf)
{

        /* if interface is down do nothing */
        if (test_bit(__I40E_DOWN, pf->state))
                return;

        if (test_bit(__I40E_FD_FLUSH_REQUESTED, pf->state))
                i40e_fdir_flush_and_replay(pf);

        i40e_fdir_check_and_reenable(pf);

}

/**
 * i40e_vsi_link_event - notify VSI of a link event
 * @vsi: vsi to be notified
 * @link_up: link up or down
 **/
static void i40e_vsi_link_event(struct i40e_vsi *vsi, bool link_up)
{
        if (!vsi || test_bit(__I40E_VSI_DOWN, vsi->state))
                return;

        switch (vsi->type) {
        case I40E_VSI_MAIN:
                if (!vsi->netdev || !vsi->netdev_registered)
                        break;

                if (link_up) {
                        netif_carrier_on(vsi->netdev);
                        netif_tx_wake_all_queues(vsi->netdev);
                } else {
                        netif_carrier_off(vsi->netdev);
                        netif_tx_stop_all_queues(vsi->netdev);
                }
                break;

        case I40E_VSI_SRIOV:
        case I40E_VSI_VMDQ2:
        case I40E_VSI_CTRL:
        case I40E_VSI_IWARP:
        case I40E_VSI_MIRROR:
        default:
                /* there is no notification for other VSIs */
                break;
        }
}

/**
 * i40e_veb_link_event - notify elements on the veb of a link event
 * @veb: veb to be notified
 * @link_up: link up or down
 **/
static void i40e_veb_link_event(struct i40e_veb *veb, bool link_up)
{
        struct i40e_vsi *vsi;
        struct i40e_pf *pf;
        int i;

        if (!veb || !veb->pf)
                return;
        pf = veb->pf;

        /* Send link event to contained VSIs */
        i40e_pf_for_each_vsi(pf, i, vsi)
                if (vsi->uplink_seid == veb->seid)
                        i40e_vsi_link_event(vsi, link_up);
}

/**
 * i40e_link_event - Update netif_carrier status
 * @pf: board private structure
 **/
static void i40e_link_event(struct i40e_pf *pf)
{
        struct i40e_vsi *vsi = i40e_pf_get_main_vsi(pf);
        struct i40e_veb *veb = i40e_pf_get_main_veb(pf);
        u8 new_link_speed, old_link_speed;
        bool new_link, old_link;
        int status;
#ifdef CONFIG_I40E_DCB
        int err;
#endif /* CONFIG_I40E_DCB */

        /* set this to force the get_link_status call to refresh state */
        pf->hw.phy.get_link_info = true;
        old_link = (pf->hw.phy.link_info_old.link_info & I40E_AQ_LINK_UP);
        status = i40e_get_link_status(&pf->hw, &new_link);

        /* On success, disable temp link polling */
        if (status == 0) {
                clear_bit(__I40E_TEMP_LINK_POLLING, pf->state);
        } else {
                /* Enable link polling temporarily until i40e_get_link_status
                 * returns 0
                 */
                set_bit(__I40E_TEMP_LINK_POLLING, pf->state);
                dev_dbg(&pf->pdev->dev, "couldn't get link state, status: %d\n",
                        status);
                return;
        }

        old_link_speed = pf->hw.phy.link_info_old.link_speed;
        new_link_speed = pf->hw.phy.link_info.link_speed;

        if (new_link == old_link &&
            new_link_speed == old_link_speed &&
            (test_bit(__I40E_VSI_DOWN, vsi->state) ||
             new_link == netif_carrier_ok(vsi->netdev)))
                return;

        i40e_print_link_message(vsi, new_link);

        /* Notify the base of the switch tree connected to
         * the link.  Floating VEBs are not notified.
         */
        if (veb)
                i40e_veb_link_event(veb, new_link);
        else
                i40e_vsi_link_event(vsi, new_link);

        if (pf->vf)
                i40e_vc_notify_link_state(pf);

        if (test_bit(I40E_FLAG_PTP_ENA, pf->flags))
                i40e_ptp_set_increment(pf);
#ifdef CONFIG_I40E_DCB
        if (new_link == old_link)
                return;
        /* Not SW DCB so firmware will take care of default settings */
        if (pf->dcbx_cap & DCB_CAP_DCBX_LLD_MANAGED)
                return;

        /* We cover here only link down, as after link up in case of SW DCB
         * SW LLDP agent will take care of setting it up
         */
        if (!new_link) {
                dev_dbg(&pf->pdev->dev, "Reconfig DCB to single TC as result of Link Down\n");
                memset(&pf->tmp_cfg, 0, sizeof(pf->tmp_cfg));
                err = i40e_dcb_sw_default_config(pf);
                if (err) {
                        clear_bit(I40E_FLAG_DCB_CAPABLE, pf->flags);
                        clear_bit(I40E_FLAG_DCB_ENA, pf->flags);
                } else {
                        pf->dcbx_cap = DCB_CAP_DCBX_HOST |
                                       DCB_CAP_DCBX_VER_IEEE;
                        set_bit(I40E_FLAG_DCB_CAPABLE, pf->flags);
                        clear_bit(I40E_FLAG_DCB_ENA, pf->flags);
                }
        }
#endif /* CONFIG_I40E_DCB */
}

/**
 * i40e_watchdog_subtask - periodic checks not using event driven response
 * @pf: board private structure
 **/
static void i40e_watchdog_subtask(struct i40e_pf *pf)
{
        struct i40e_vsi *vsi;
        struct i40e_veb *veb;
        int i;

        /* if interface is down do nothing */
        if (test_bit(__I40E_DOWN, pf->state) ||
            test_bit(__I40E_CONFIG_BUSY, pf->state))
                return;

        /* make sure we don't do these things too often */
        if (time_before(jiffies, (pf->service_timer_previous +
                                  pf->service_timer_period)))
                return;
        pf->service_timer_previous = jiffies;

        if (test_bit(I40E_FLAG_LINK_POLLING_ENA, pf->flags) ||
            test_bit(__I40E_TEMP_LINK_POLLING, pf->state))
                i40e_link_event(pf);

        /* Update the stats for active netdevs so the network stack
         * can look at updated numbers whenever it cares to
         */
        i40e_pf_for_each_vsi(pf, i, vsi)
                if (vsi->netdev)
                        i40e_update_stats(vsi);

        if (test_bit(I40E_FLAG_VEB_STATS_ENA, pf->flags)) {
                /* Update the stats for the active switching components */
                i40e_pf_for_each_veb(pf, i, veb)
                        i40e_update_veb_stats(veb);
        }

        i40e_ptp_rx_hang(pf);
        i40e_ptp_tx_hang(pf);
}

/**
 * i40e_reset_subtask - Set up for resetting the device and driver
 * @pf: board private structure
 **/
static void i40e_reset_subtask(struct i40e_pf *pf)
{
        u32 reset_flags = 0;

        if (test_bit(__I40E_REINIT_REQUESTED, pf->state)) {
                reset_flags |= BIT(__I40E_REINIT_REQUESTED);
                clear_bit(__I40E_REINIT_REQUESTED, pf->state);
        }
        if (test_bit(__I40E_PF_RESET_REQUESTED, pf->state)) {
                reset_flags |= BIT(__I40E_PF_RESET_REQUESTED);
                clear_bit(__I40E_PF_RESET_REQUESTED, pf->state);
        }
        if (test_bit(__I40E_CORE_RESET_REQUESTED, pf->state)) {
                reset_flags |= BIT(__I40E_CORE_RESET_REQUESTED);
                clear_bit(__I40E_CORE_RESET_REQUESTED, pf->state);
        }
        if (test_bit(__I40E_GLOBAL_RESET_REQUESTED, pf->state)) {
                reset_flags |= BIT(__I40E_GLOBAL_RESET_REQUESTED);
                clear_bit(__I40E_GLOBAL_RESET_REQUESTED, pf->state);
        }
        if (test_bit(__I40E_DOWN_REQUESTED, pf->state)) {
                reset_flags |= BIT(__I40E_DOWN_REQUESTED);
                clear_bit(__I40E_DOWN_REQUESTED, pf->state);
        }

        /* If there's a recovery already waiting, it takes
         * precedence before starting a new reset sequence.
         */
        if (test_bit(__I40E_RESET_INTR_RECEIVED, pf->state)) {
                i40e_prep_for_reset(pf);
                i40e_reset(pf);
                i40e_rebuild(pf, false, false);
        }

        /* If we're already down or resetting, just bail */
        if (reset_flags &&
            !test_bit(__I40E_DOWN, pf->state) &&
            !test_bit(__I40E_CONFIG_BUSY, pf->state)) {
                i40e_do_reset(pf, reset_flags, false);
        }
}

/**
 * i40e_handle_link_event - Handle link event
 * @pf: board private structure
 * @e: event info posted on ARQ
 **/
static void i40e_handle_link_event(struct i40e_pf *pf,
                                   struct i40e_arq_event_info *e)
{
        struct i40e_aqc_get_link_status *status =
                (struct i40e_aqc_get_link_status *)&e->desc.params.raw;

        /* Do a new status request to re-enable LSE reporting
         * and load new status information into the hw struct
         * This completely ignores any state information
         * in the ARQ event info, instead choosing to always
         * issue the AQ update link status command.
         */
        i40e_link_event(pf);

        /* Check if module meets thermal requirements */
        if (status->phy_type == I40E_PHY_TYPE_NOT_SUPPORTED_HIGH_TEMP) {
                dev_err(&pf->pdev->dev,
                        "Rx/Tx is disabled on this device because the module does not meet thermal requirements.\n");
                dev_err(&pf->pdev->dev,
                        "Refer to the Intel(R) Ethernet Adapters and Devices User Guide for a list of supported modules.\n");
        } else {
                /* check for unqualified module, if link is down, suppress
                 * the message if link was forced to be down.
                 */
                if ((status->link_info & I40E_AQ_MEDIA_AVAILABLE) &&
                    (!(status->an_info & I40E_AQ_QUALIFIED_MODULE)) &&
                    (!(status->link_info & I40E_AQ_LINK_UP)) &&
                    (!test_bit(I40E_FLAG_LINK_DOWN_ON_CLOSE_ENA, pf->flags))) {
                        dev_err(&pf->pdev->dev,
                                "Rx/Tx is disabled on this device because an unsupported SFP module type was detected.\n");
                        dev_err(&pf->pdev->dev,
                                "Refer to the Intel(R) Ethernet Adapters and Devices User Guide for a list of supported modules.\n");
                }
        }
}

/**
 * i40e_clean_adminq_subtask - Clean the AdminQ rings
 * @pf: board private structure
 **/
static void i40e_clean_adminq_subtask(struct i40e_pf *pf)
{
        struct i40e_arq_event_info event;
        struct i40e_hw *hw = &pf->hw;
        u16 pending, i = 0;
        u16 opcode;
        u32 oldval;
        int ret;
        u32 val;

        /* Do not run clean AQ when PF reset fails */
        if (test_bit(__I40E_RESET_FAILED, pf->state))
                return;

        /* check for error indications */
        val = rd32(&pf->hw, I40E_PF_ARQLEN);
        oldval = val;
        if (val & I40E_PF_ARQLEN_ARQVFE_MASK) {
                if (hw->debug_mask & I40E_DEBUG_AQ)
                        dev_info(&pf->pdev->dev, "ARQ VF Error detected\n");
                val &= ~I40E_PF_ARQLEN_ARQVFE_MASK;
        }
        if (val & I40E_PF_ARQLEN_ARQOVFL_MASK) {
                if (hw->debug_mask & I40E_DEBUG_AQ)
                        dev_info(&pf->pdev->dev, "ARQ Overflow Error detected\n");
                val &= ~I40E_PF_ARQLEN_ARQOVFL_MASK;
                pf->arq_overflows++;
        }
        if (val & I40E_PF_ARQLEN_ARQCRIT_MASK) {
                if (hw->debug_mask & I40E_DEBUG_AQ)
                        dev_info(&pf->pdev->dev, "ARQ Critical Error detected\n");
                val &= ~I40E_PF_ARQLEN_ARQCRIT_MASK;
        }
        if (oldval != val)
                wr32(&pf->hw, I40E_PF_ARQLEN, val);

        val = rd32(&pf->hw, I40E_PF_ATQLEN);
        oldval = val;
        if (val & I40E_PF_ATQLEN_ATQVFE_MASK) {
                if (pf->hw.debug_mask & I40E_DEBUG_AQ)
                        dev_info(&pf->pdev->dev, "ASQ VF Error detected\n");
                val &= ~I40E_PF_ATQLEN_ATQVFE_MASK;
        }
        if (val & I40E_PF_ATQLEN_ATQOVFL_MASK) {
                if (pf->hw.debug_mask & I40E_DEBUG_AQ)
                        dev_info(&pf->pdev->dev, "ASQ Overflow Error detected\n");
                val &= ~I40E_PF_ATQLEN_ATQOVFL_MASK;
        }
        if (val & I40E_PF_ATQLEN_ATQCRIT_MASK) {
                if (pf->hw.debug_mask & I40E_DEBUG_AQ)
                        dev_info(&pf->pdev->dev, "ASQ Critical Error detected\n");
                val &= ~I40E_PF_ATQLEN_ATQCRIT_MASK;
        }
        if (oldval != val)
                wr32(&pf->hw, I40E_PF_ATQLEN, val);

        event.buf_len = I40E_MAX_AQ_BUF_SIZE;
        event.msg_buf = kzalloc(event.buf_len, GFP_KERNEL);
        if (!event.msg_buf)
                return;

        do {
                ret = i40e_clean_arq_element(hw, &event, &pending);
                if (ret == -EALREADY)
                        break;
                else if (ret) {
                        dev_info(&pf->pdev->dev, "ARQ event error %d\n", ret);
                        break;
                }

                opcode = le16_to_cpu(event.desc.opcode);
                switch (opcode) {

                case i40e_aqc_opc_get_link_status:
                        rtnl_lock();
                        i40e_handle_link_event(pf, &event);
                        rtnl_unlock();
                        break;
                case i40e_aqc_opc_send_msg_to_pf:
                        ret = i40e_vc_process_vf_msg(pf,
                                        le16_to_cpu(event.desc.retval),
                                        le32_to_cpu(event.desc.cookie_high),
                                        le32_to_cpu(event.desc.cookie_low),
                                        event.msg_buf,
                                        event.msg_len);
                        break;
                case i40e_aqc_opc_lldp_update_mib:
                        dev_dbg(&pf->pdev->dev, "ARQ: Update LLDP MIB event received\n");
#ifdef CONFIG_I40E_DCB
                        rtnl_lock();
                        i40e_handle_lldp_event(pf, &event);
                        rtnl_unlock();
#endif /* CONFIG_I40E_DCB */
                        break;
                case i40e_aqc_opc_event_lan_overflow:
                        dev_dbg(&pf->pdev->dev, "ARQ LAN queue overflow event received\n");
                        i40e_handle_lan_overflow_event(pf, &event);
                        break;
                case i40e_aqc_opc_send_msg_to_peer:
                        dev_info(&pf->pdev->dev, "ARQ: Msg from other pf\n");
                        break;
                case i40e_aqc_opc_nvm_erase:
                case i40e_aqc_opc_nvm_update:
                case i40e_aqc_opc_oem_post_update:
                        i40e_debug(&pf->hw, I40E_DEBUG_NVM,
                                   "ARQ NVM operation 0x%04x completed\n",
                                   opcode);
                        break;
                default:
                        dev_info(&pf->pdev->dev,
                                 "ARQ: Unknown event 0x%04x ignored\n",
                                 opcode);
                        break;
                }
        } while (i++ < I40E_AQ_WORK_LIMIT);

        if (i < I40E_AQ_WORK_LIMIT)
                clear_bit(__I40E_ADMINQ_EVENT_PENDING, pf->state);

        /* re-enable Admin queue interrupt cause */
        val = rd32(hw, I40E_PFINT_ICR0_ENA);
        val |=  I40E_PFINT_ICR0_ENA_ADMINQ_MASK;
        wr32(hw, I40E_PFINT_ICR0_ENA, val);
        i40e_flush(hw);

        kfree(event.msg_buf);
}

/**
 * i40e_verify_eeprom - make sure eeprom is good to use
 * @pf: board private structure
 **/
static void i40e_verify_eeprom(struct i40e_pf *pf)
{
        int err;

        err = i40e_diag_eeprom_test(&pf->hw);
        if (err) {
                /* retry in case of garbage read */
                err = i40e_diag_eeprom_test(&pf->hw);
                if (err) {
                        dev_info(&pf->pdev->dev, "eeprom check failed (%d), Tx/Rx traffic disabled\n",
                                 err);
                        set_bit(__I40E_BAD_EEPROM, pf->state);
                }
        }

        if (!err && test_bit(__I40E_BAD_EEPROM, pf->state)) {
                dev_info(&pf->pdev->dev, "eeprom check passed, Tx/Rx traffic enabled\n");
                clear_bit(__I40E_BAD_EEPROM, pf->state);
        }
}

/**
 * i40e_enable_pf_switch_lb
 * @pf: pointer to the PF structure
 *
 * enable switch loop back or die - no point in a return value
 **/
static void i40e_enable_pf_switch_lb(struct i40e_pf *pf)
{
        struct i40e_vsi *vsi = i40e_pf_get_main_vsi(pf);
        struct i40e_vsi_context ctxt;
        int ret;

        ctxt.seid = pf->main_vsi_seid;
        ctxt.pf_num = pf->hw.pf_id;
        ctxt.vf_num = 0;
        ret = i40e_aq_get_vsi_params(&pf->hw, &ctxt, NULL);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "couldn't get PF vsi config, err %pe aq_err %s\n",
                         ERR_PTR(ret),
                         i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
                return;
        }
        ctxt.flags = I40E_AQ_VSI_TYPE_PF;
        ctxt.info.valid_sections = cpu_to_le16(I40E_AQ_VSI_PROP_SWITCH_VALID);
        ctxt.info.switch_id |= cpu_to_le16(I40E_AQ_VSI_SW_ID_FLAG_ALLOW_LB);

        ret = i40e_aq_update_vsi_params(&vsi->back->hw, &ctxt, NULL);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "update vsi switch failed, err %pe aq_err %s\n",
                         ERR_PTR(ret),
                         i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
        }
}

/**
 * i40e_disable_pf_switch_lb
 * @pf: pointer to the PF structure
 *
 * disable switch loop back or die - no point in a return value
 **/
static void i40e_disable_pf_switch_lb(struct i40e_pf *pf)
{
        struct i40e_vsi *vsi = i40e_pf_get_main_vsi(pf);
        struct i40e_vsi_context ctxt;
        int ret;

        ctxt.seid = pf->main_vsi_seid;
        ctxt.pf_num = pf->hw.pf_id;
        ctxt.vf_num = 0;
        ret = i40e_aq_get_vsi_params(&pf->hw, &ctxt, NULL);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "couldn't get PF vsi config, err %pe aq_err %s\n",
                         ERR_PTR(ret),
                         i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
                return;
        }
        ctxt.flags = I40E_AQ_VSI_TYPE_PF;
        ctxt.info.valid_sections = cpu_to_le16(I40E_AQ_VSI_PROP_SWITCH_VALID);
        ctxt.info.switch_id &= ~cpu_to_le16(I40E_AQ_VSI_SW_ID_FLAG_ALLOW_LB);

        ret = i40e_aq_update_vsi_params(&vsi->back->hw, &ctxt, NULL);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "update vsi switch failed, err %pe aq_err %s\n",
                         ERR_PTR(ret),
                         i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
        }
}

/**
 * i40e_config_bridge_mode - Configure the HW bridge mode
 * @veb: pointer to the bridge instance
 *
 * Configure the loop back mode for the LAN VSI that is downlink to the
 * specified HW bridge instance. It is expected this function is called
 * when a new HW bridge is instantiated.
 **/
static void i40e_config_bridge_mode(struct i40e_veb *veb)
{
        struct i40e_pf *pf = veb->pf;

        if (pf->hw.debug_mask & I40E_DEBUG_LAN)
                dev_info(&pf->pdev->dev, "enabling bridge mode: %s\n",
                         veb->bridge_mode == BRIDGE_MODE_VEPA ? "VEPA" : "VEB");
        if (veb->bridge_mode & BRIDGE_MODE_VEPA)
                i40e_disable_pf_switch_lb(pf);
        else
                i40e_enable_pf_switch_lb(pf);
}

/**
 * i40e_reconstitute_veb - rebuild the VEB and VSIs connected to it
 * @veb: pointer to the VEB instance
 *
 * This is a function that builds the attached VSIs. We track the connections
 * through our own index numbers because the seid's from the HW could change
 * across the reset.
 **/
static int i40e_reconstitute_veb(struct i40e_veb *veb)
{
        struct i40e_vsi *ctl_vsi = NULL;
        struct i40e_pf *pf = veb->pf;
        struct i40e_vsi *vsi;
        int v, ret;

        /* As we do not maintain PV (port virtualizer) switch element then
         * there can be only one non-floating VEB that have uplink to MAC SEID
         * and its control VSI is the main one.
         */
        if (WARN_ON(veb->uplink_seid && veb->uplink_seid != pf->mac_seid)) {
                dev_err(&pf->pdev->dev,
                        "Invalid uplink SEID for VEB %d\n", veb->idx);
                return -ENOENT;
        }

        if (veb->uplink_seid == pf->mac_seid) {
                /* Check that the LAN VSI has VEB owning flag set */
                ctl_vsi = i40e_pf_get_main_vsi(pf);

                if (WARN_ON(ctl_vsi->veb_idx != veb->idx ||
                            !(ctl_vsi->flags & I40E_VSI_FLAG_VEB_OWNER))) {
                        dev_err(&pf->pdev->dev,
                                "Invalid control VSI for VEB %d\n", veb->idx);
                        return -ENOENT;
                }

                /* Add the control VSI to switch */
                ret = i40e_add_vsi(ctl_vsi);
                if (ret) {
                        dev_err(&pf->pdev->dev,
                                "Rebuild of owner VSI for VEB %d failed: %d\n",
                                veb->idx, ret);
                        return ret;
                }

                i40e_vsi_reset_stats(ctl_vsi);
        }

        /* create the VEB in the switch and move the VSI onto the VEB */
        ret = i40e_add_veb(veb, ctl_vsi);
        if (ret)
                return ret;

        if (veb->uplink_seid) {
                if (test_bit(I40E_FLAG_VEB_MODE_ENA, pf->flags))
                        veb->bridge_mode = BRIDGE_MODE_VEB;
                else
                        veb->bridge_mode = BRIDGE_MODE_VEPA;
                i40e_config_bridge_mode(veb);
        }

        /* create the remaining VSIs attached to this VEB */
        i40e_pf_for_each_vsi(pf, v, vsi) {
                if (vsi == ctl_vsi)
                        continue;

                if (vsi->veb_idx == veb->idx) {
                        vsi->uplink_seid = veb->seid;
                        ret = i40e_add_vsi(vsi);
                        if (ret) {
                                dev_info(&pf->pdev->dev,
                                         "rebuild of vsi_idx %d failed: %d\n",
                                         v, ret);
                                return ret;
                        }
                        i40e_vsi_reset_stats(vsi);
                }
        }

        return ret;
}

/**
 * i40e_get_capabilities - get info about the HW
 * @pf: the PF struct
 * @list_type: AQ capability to be queried
 **/
static int i40e_get_capabilities(struct i40e_pf *pf,
                                 enum i40e_admin_queue_opc list_type)
{
        struct i40e_aqc_list_capabilities_element_resp *cap_buf;
        u16 data_size;
        int buf_len;
        int err;

        buf_len = 40 * sizeof(struct i40e_aqc_list_capabilities_element_resp);
        do {
                cap_buf = kzalloc(buf_len, GFP_KERNEL);
                if (!cap_buf)
                        return -ENOMEM;

                /* this loads the data into the hw struct for us */
                err = i40e_aq_discover_capabilities(&pf->hw, cap_buf, buf_len,
                                                    &data_size, list_type,
                                                    NULL);
                /* data loaded, buffer no longer needed */
                kfree(cap_buf);

                if (pf->hw.aq.asq_last_status == I40E_AQ_RC_ENOMEM) {
                        /* retry with a larger buffer */
                        buf_len = data_size;
                } else if (pf->hw.aq.asq_last_status != I40E_AQ_RC_OK || err) {
                        dev_info(&pf->pdev->dev,
                                 "capability discovery failed, err %pe aq_err %s\n",
                                 ERR_PTR(err),
                                 i40e_aq_str(&pf->hw,
                                             pf->hw.aq.asq_last_status));
                        return -ENODEV;
                }
        } while (err);

        if (pf->hw.debug_mask & I40E_DEBUG_USER) {
                if (list_type == i40e_aqc_opc_list_func_capabilities) {
                        dev_info(&pf->pdev->dev,
                                 "pf=%d, num_vfs=%d, msix_pf=%d, msix_vf=%d, fd_g=%d, fd_b=%d, pf_max_q=%d num_vsi=%d\n",
                                 pf->hw.pf_id, pf->hw.func_caps.num_vfs,
                                 pf->hw.func_caps.num_msix_vectors,
                                 pf->hw.func_caps.num_msix_vectors_vf,
                                 pf->hw.func_caps.fd_filters_guaranteed,
                                 pf->hw.func_caps.fd_filters_best_effort,
                                 pf->hw.func_caps.num_tx_qp,
                                 pf->hw.func_caps.num_vsis);
                } else if (list_type == i40e_aqc_opc_list_dev_capabilities) {
                        dev_info(&pf->pdev->dev,
                                 "switch_mode=0x%04x, function_valid=0x%08x\n",
                                 pf->hw.dev_caps.switch_mode,
                                 pf->hw.dev_caps.valid_functions);
                        dev_info(&pf->pdev->dev,
                                 "SR-IOV=%d, num_vfs for all function=%u\n",
                                 pf->hw.dev_caps.sr_iov_1_1,
                                 pf->hw.dev_caps.num_vfs);
                        dev_info(&pf->pdev->dev,
                                 "num_vsis=%u, num_rx:%u, num_tx=%u\n",
                                 pf->hw.dev_caps.num_vsis,
                                 pf->hw.dev_caps.num_rx_qp,
                                 pf->hw.dev_caps.num_tx_qp);
                }
        }
        if (list_type == i40e_aqc_opc_list_func_capabilities) {
#define DEF_NUM_VSI (1 + (pf->hw.func_caps.fcoe ? 1 : 0) \
                       + pf->hw.func_caps.num_vfs)
                if (pf->hw.revision_id == 0 &&
                    pf->hw.func_caps.num_vsis < DEF_NUM_VSI) {
                        dev_info(&pf->pdev->dev,
                                 "got num_vsis %d, setting num_vsis to %d\n",
                                 pf->hw.func_caps.num_vsis, DEF_NUM_VSI);
                        pf->hw.func_caps.num_vsis = DEF_NUM_VSI;
                }
        }
        return 0;
}

static int i40e_vsi_clear(struct i40e_vsi *vsi);

/**
 * i40e_fdir_sb_setup - initialize the Flow Director resources for Sideband
 * @pf: board private structure
 **/
static void i40e_fdir_sb_setup(struct i40e_pf *pf)
{
        struct i40e_vsi *main_vsi, *vsi;

        /* quick workaround for an NVM issue that leaves a critical register
         * uninitialized
         */
        if (!rd32(&pf->hw, I40E_GLQF_HKEY(0))) {
                static const u32 hkey[] = {
                        0xe640d33f, 0xcdfe98ab, 0x73fa7161, 0x0d7a7d36,
                        0xeacb7d61, 0xaa4f05b6, 0x9c5c89ed, 0xfc425ddb,
                        0xa4654832, 0xfc7461d4, 0x8f827619, 0xf5c63c21,
                        0x95b3a76d};
                int i;

                for (i = 0; i <= I40E_GLQF_HKEY_MAX_INDEX; i++)
                        wr32(&pf->hw, I40E_GLQF_HKEY(i), hkey[i]);
        }

        if (!test_bit(I40E_FLAG_FD_SB_ENA, pf->flags))
                return;

        /* find existing VSI and see if it needs configuring */
        vsi = i40e_find_vsi_by_type(pf, I40E_VSI_FDIR);

        /* create a new VSI if none exists */
        if (!vsi) {
                main_vsi = i40e_pf_get_main_vsi(pf);
                vsi = i40e_vsi_setup(pf, I40E_VSI_FDIR, main_vsi->seid, 0);
                if (!vsi) {
                        dev_info(&pf->pdev->dev, "Couldn't create FDir VSI\n");
                        clear_bit(I40E_FLAG_FD_SB_ENA, pf->flags);
                        set_bit(I40E_FLAG_FD_SB_INACTIVE, pf->flags);
                        return;
                }
        }

        i40e_vsi_setup_irqhandler(vsi, i40e_fdir_clean_ring);
}

/**
 * i40e_fdir_teardown - release the Flow Director resources
 * @pf: board private structure
 **/
static void i40e_fdir_teardown(struct i40e_pf *pf)
{
        struct i40e_vsi *vsi;

        i40e_fdir_filter_exit(pf);
        vsi = i40e_find_vsi_by_type(pf, I40E_VSI_FDIR);
        if (vsi)
                i40e_vsi_release(vsi);
}

/**
 * i40e_rebuild_cloud_filters - Rebuilds cloud filters for VSIs
 * @vsi: PF main vsi
 * @seid: seid of main or channel VSIs
 *
 * Rebuilds cloud filters associated with main VSI and channel VSIs if they
 * existed before reset
 **/
static int i40e_rebuild_cloud_filters(struct i40e_vsi *vsi, u16 seid)
{
        struct i40e_cloud_filter *cfilter;
        struct i40e_pf *pf = vsi->back;
        struct hlist_node *node;
        int ret;

        /* Add cloud filters back if they exist */
        hlist_for_each_entry_safe(cfilter, node, &pf->cloud_filter_list,
                                  cloud_node) {
                if (cfilter->seid != seid)
                        continue;

                if (cfilter->dst_port)
                        ret = i40e_add_del_cloud_filter_big_buf(vsi, cfilter,
                                                                true);
                else
                        ret = i40e_add_del_cloud_filter(vsi, cfilter, true);

                if (ret) {
                        dev_dbg(&pf->pdev->dev,
                                "Failed to rebuild cloud filter, err %pe aq_err %s\n",
                                ERR_PTR(ret),
                                i40e_aq_str(&pf->hw,
                                            pf->hw.aq.asq_last_status));
                        return ret;
                }
        }
        return 0;
}

/**
 * i40e_rebuild_channels - Rebuilds channel VSIs if they existed before reset
 * @vsi: PF main vsi
 *
 * Rebuilds channel VSIs if they existed before reset
 **/
static int i40e_rebuild_channels(struct i40e_vsi *vsi)
{
        struct i40e_channel *ch, *ch_tmp;
        int ret;

        if (list_empty(&vsi->ch_list))
                return 0;

        list_for_each_entry_safe(ch, ch_tmp, &vsi->ch_list, list) {
                if (!ch->initialized)
                        break;
                /* Proceed with creation of channel (VMDq2) VSI */
                ret = i40e_add_channel(vsi->back, vsi->uplink_seid, ch);
                if (ret) {
                        dev_info(&vsi->back->pdev->dev,
                                 "failed to rebuild channels using uplink_seid %u\n",
                                 vsi->uplink_seid);
                        return ret;
                }
                /* Reconfigure TX queues using QTX_CTL register */
                ret = i40e_channel_config_tx_ring(vsi->back, vsi, ch);
                if (ret) {
                        dev_info(&vsi->back->pdev->dev,
                                 "failed to configure TX rings for channel %u\n",
                                 ch->seid);
                        return ret;
                }
                /* update 'next_base_queue' */
                vsi->next_base_queue = vsi->next_base_queue +
                                                        ch->num_queue_pairs;
                if (ch->max_tx_rate) {
                        u64 credits = ch->max_tx_rate;

                        if (i40e_set_bw_limit(vsi, ch->seid,
                                              ch->max_tx_rate))
                                return -EINVAL;

                        do_div(credits, I40E_BW_CREDIT_DIVISOR);
                        dev_dbg(&vsi->back->pdev->dev,
                                "Set tx rate of %llu Mbps (count of 50Mbps %llu) for vsi->seid %u\n",
                                ch->max_tx_rate,
                                credits,
                                ch->seid);
                }
                ret = i40e_rebuild_cloud_filters(vsi, ch->seid);
                if (ret) {
                        dev_dbg(&vsi->back->pdev->dev,
                                "Failed to rebuild cloud filters for channel VSI %u\n",
                                ch->seid);
                        return ret;
                }
        }
        return 0;
}

/**
 * i40e_clean_xps_state - clean xps state for every tx_ring
 * @vsi: ptr to the VSI
 **/
static void i40e_clean_xps_state(struct i40e_vsi *vsi)
{
        int i;

        if (vsi->tx_rings)
                for (i = 0; i < vsi->num_queue_pairs; i++)
                        if (vsi->tx_rings[i])
                                clear_bit(__I40E_TX_XPS_INIT_DONE,
                                          vsi->tx_rings[i]->state);
}

/**
 * i40e_prep_for_reset - prep for the core to reset
 * @pf: board private structure
 *
 * Close up the VFs and other things in prep for PF Reset.
  **/
static void i40e_prep_for_reset(struct i40e_pf *pf)
{
        struct i40e_hw *hw = &pf->hw;
        struct i40e_vsi *vsi;
        int ret = 0;
        u32 v;

        clear_bit(__I40E_RESET_INTR_RECEIVED, pf->state);
        if (test_and_set_bit(__I40E_RESET_RECOVERY_PENDING, pf->state))
                return;
        if (i40e_check_asq_alive(&pf->hw))
                i40e_vc_notify_reset(pf);

        dev_dbg(&pf->pdev->dev, "Tearing down internal switch for reset\n");

        /* quiesce the VSIs and their queues that are not already DOWN */
        i40e_pf_quiesce_all_vsi(pf);

        i40e_pf_for_each_vsi(pf, v, vsi) {
                i40e_clean_xps_state(vsi);
                vsi->seid = 0;
        }

        i40e_shutdown_adminq(&pf->hw);

        /* call shutdown HMC */
        if (hw->hmc.hmc_obj) {
                ret = i40e_shutdown_lan_hmc(hw);
                if (ret)
                        dev_warn(&pf->pdev->dev,
                                 "shutdown_lan_hmc failed: %d\n", ret);
        }

        /* Save the current PTP time so that we can restore the time after the
         * reset completes.
         */
        i40e_ptp_save_hw_time(pf);
}

/**
 * i40e_send_version - update firmware with driver version
 * @pf: PF struct
 */
static void i40e_send_version(struct i40e_pf *pf)
{
        struct i40e_driver_version dv;

        dv.major_version = 0xff;
        dv.minor_version = 0xff;
        dv.build_version = 0xff;
        dv.subbuild_version = 0;
        strscpy(dv.driver_string, UTS_RELEASE, sizeof(dv.driver_string));
        i40e_aq_send_driver_version(&pf->hw, &dv, NULL);
}

/**
 * i40e_get_oem_version - get OEM specific version information
 * @hw: pointer to the hardware structure
 **/
static void i40e_get_oem_version(struct i40e_hw *hw)
{
        u16 block_offset = 0xffff;
        u16 block_length = 0;
        u16 capabilities = 0;
        u16 gen_snap = 0;
        u16 release = 0;

#define I40E_SR_NVM_OEM_VERSION_PTR             0x1B
#define I40E_NVM_OEM_LENGTH_OFFSET              0x00
#define I40E_NVM_OEM_CAPABILITIES_OFFSET        0x01
#define I40E_NVM_OEM_GEN_OFFSET                 0x02
#define I40E_NVM_OEM_RELEASE_OFFSET             0x03
#define I40E_NVM_OEM_CAPABILITIES_MASK          0x000F
#define I40E_NVM_OEM_LENGTH                     3

        /* Check if pointer to OEM version block is valid. */
        i40e_read_nvm_word(hw, I40E_SR_NVM_OEM_VERSION_PTR, &block_offset);
        if (block_offset == 0xffff)
                return;

        /* Check if OEM version block has correct length. */
        i40e_read_nvm_word(hw, block_offset + I40E_NVM_OEM_LENGTH_OFFSET,
                           &block_length);
        if (block_length < I40E_NVM_OEM_LENGTH)
                return;

        /* Check if OEM version format is as expected. */
        i40e_read_nvm_word(hw, block_offset + I40E_NVM_OEM_CAPABILITIES_OFFSET,
                           &capabilities);
        if ((capabilities & I40E_NVM_OEM_CAPABILITIES_MASK) != 0)
                return;

        i40e_read_nvm_word(hw, block_offset + I40E_NVM_OEM_GEN_OFFSET,
                           &gen_snap);
        i40e_read_nvm_word(hw, block_offset + I40E_NVM_OEM_RELEASE_OFFSET,
                           &release);
        hw->nvm.oem_ver =
                FIELD_PREP(I40E_OEM_GEN_MASK | I40E_OEM_SNAP_MASK, gen_snap) |
                FIELD_PREP(I40E_OEM_RELEASE_MASK, release);
        hw->nvm.eetrack = I40E_OEM_EETRACK_ID;
}

/**
 * i40e_reset - wait for core reset to finish reset, reset pf if corer not seen
 * @pf: board private structure
 **/
static int i40e_reset(struct i40e_pf *pf)
{
        struct i40e_hw *hw = &pf->hw;
        int ret;

        ret = i40e_pf_reset(hw);
        if (ret) {
                dev_info(&pf->pdev->dev, "PF reset failed, %d\n", ret);
                set_bit(__I40E_RESET_FAILED, pf->state);
                clear_bit(__I40E_RESET_RECOVERY_PENDING, pf->state);
        } else {
                pf->pfr_count++;
        }
        return ret;
}

/**
 * i40e_rebuild - rebuild using a saved config
 * @pf: board private structure
 * @reinit: if the Main VSI needs to re-initialized.
 * @lock_acquired: indicates whether or not the lock has been acquired
 * before this function was called.
 **/
static void i40e_rebuild(struct i40e_pf *pf, bool reinit, bool lock_acquired)
{
        const bool is_recovery_mode_reported = i40e_check_recovery_mode(pf);
        struct i40e_vsi *vsi = i40e_pf_get_main_vsi(pf);
        struct i40e_hw *hw = &pf->hw;
        struct i40e_veb *veb;
        int ret;
        u32 val;
        int v;

        if (test_bit(__I40E_EMP_RESET_INTR_RECEIVED, pf->state) &&
            is_recovery_mode_reported)
                i40e_set_ethtool_ops(vsi->netdev);

        if (test_bit(__I40E_DOWN, pf->state) &&
            !test_bit(__I40E_RECOVERY_MODE, pf->state))
                goto clear_recovery;
        dev_dbg(&pf->pdev->dev, "Rebuilding internal switch\n");

        /* rebuild the basics for the AdminQ, HMC, and initial HW switch */
        ret = i40e_init_adminq(&pf->hw);
        if (ret) {
                dev_info(&pf->pdev->dev, "Rebuild AdminQ failed, err %pe aq_err %s\n",
                         ERR_PTR(ret),
                         i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
                goto clear_recovery;
        }
        i40e_get_oem_version(&pf->hw);

        if (test_and_clear_bit(__I40E_EMP_RESET_INTR_RECEIVED, pf->state)) {
                /* The following delay is necessary for firmware update. */
                mdelay(1000);
        }

        /* re-verify the eeprom if we just had an EMP reset */
        if (test_and_clear_bit(__I40E_EMP_RESET_INTR_RECEIVED, pf->state))
                i40e_verify_eeprom(pf);

        /* if we are going out of or into recovery mode we have to act
         * accordingly with regard to resources initialization
         * and deinitialization
         */
        if (test_bit(__I40E_RECOVERY_MODE, pf->state)) {
                if (i40e_get_capabilities(pf,
                                          i40e_aqc_opc_list_func_capabilities))
                        goto end_unlock;

                if (is_recovery_mode_reported) {
                        /* we're staying in recovery mode so we'll reinitialize
                         * misc vector here
                         */
                        if (i40e_setup_misc_vector_for_recovery_mode(pf))
                                goto end_unlock;
                } else {
                        if (!lock_acquired)
                                rtnl_lock();
                        /* we're going out of recovery mode so we'll free
                         * the IRQ allocated specifically for recovery mode
                         * and restore the interrupt scheme
                         */
                        free_irq(pf->pdev->irq, pf);
                        i40e_clear_interrupt_scheme(pf);
                        if (i40e_restore_interrupt_scheme(pf))
                                goto end_unlock;
                }

                /* tell the firmware that we're starting */
                i40e_send_version(pf);

                /* bail out in case recovery mode was detected, as there is
                 * no need for further configuration.
                 */
                goto end_unlock;
        }

        i40e_clear_pxe_mode(hw);
        ret = i40e_get_capabilities(pf, i40e_aqc_opc_list_func_capabilities);
        if (ret)
                goto end_core_reset;

        ret = i40e_init_lan_hmc(hw, hw->func_caps.num_tx_qp,
                                hw->func_caps.num_rx_qp, 0, 0);
        if (ret) {
                dev_info(&pf->pdev->dev, "init_lan_hmc failed: %d\n", ret);
                goto end_core_reset;
        }
        ret = i40e_configure_lan_hmc(hw, I40E_HMC_MODEL_DIRECT_ONLY);
        if (ret) {
                dev_info(&pf->pdev->dev, "configure_lan_hmc failed: %d\n", ret);
                goto end_core_reset;
        }

#ifdef CONFIG_I40E_DCB
        /* Enable FW to write a default DCB config on link-up
         * unless I40E_FLAG_TC_MQPRIO was enabled or DCB
         * is not supported with new link speed
         */
        if (i40e_is_tc_mqprio_enabled(pf)) {
                i40e_aq_set_dcb_parameters(hw, false, NULL);
        } else {
                if (I40E_IS_X710TL_DEVICE(hw->device_id) &&
                    (hw->phy.link_info.link_speed &
                     (I40E_LINK_SPEED_2_5GB | I40E_LINK_SPEED_5GB))) {
                        i40e_aq_set_dcb_parameters(hw, false, NULL);
                        dev_warn(&pf->pdev->dev,
                                 "DCB is not supported for X710-T*L 2.5/5G speeds\n");
                        clear_bit(I40E_FLAG_DCB_CAPABLE, pf->flags);
                } else {
                        i40e_aq_set_dcb_parameters(hw, true, NULL);
                        ret = i40e_init_pf_dcb(pf);
                        if (ret) {
                                dev_info(&pf->pdev->dev, "DCB init failed %d, disabled\n",
                                         ret);
                                clear_bit(I40E_FLAG_DCB_CAPABLE, pf->flags);
                                /* Continue without DCB enabled */
                        }
                }
        }

#endif /* CONFIG_I40E_DCB */
        if (!lock_acquired)
                rtnl_lock();
        ret = i40e_setup_pf_switch(pf, reinit, true);
        if (ret)
                goto end_unlock;

        /* The driver only wants link up/down and module qualification
         * reports from firmware.  Note the negative logic.
         */
        ret = i40e_aq_set_phy_int_mask(&pf->hw,
                                       ~(I40E_AQ_EVENT_LINK_UPDOWN |
                                         I40E_AQ_EVENT_MEDIA_NA |
                                         I40E_AQ_EVENT_MODULE_QUAL_FAIL), NULL);
        if (ret)
                dev_info(&pf->pdev->dev, "set phy mask fail, err %pe aq_err %s\n",
                         ERR_PTR(ret),
                         i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));

        /* Rebuild the VSIs and VEBs that existed before reset.
         * They are still in our local switch element arrays, so only
         * need to rebuild the switch model in the HW.
         *
         * If there were VEBs but the reconstitution failed, we'll try
         * to recover minimal use by getting the basic PF VSI working.
         */
        if (vsi->uplink_seid != pf->mac_seid) {
                dev_dbg(&pf->pdev->dev, "attempting to rebuild switch\n");

                /* Rebuild VEBs */
                i40e_pf_for_each_veb(pf, v, veb) {
                        ret = i40e_reconstitute_veb(veb);
                        if (!ret)
                                continue;

                        /* If Main VEB failed, we're in deep doodoo,
                         * so give up rebuilding the switch and set up
                         * for minimal rebuild of PF VSI.
                         * If orphan failed, we'll report the error
                         * but try to keep going.
                         */
                        if (veb->uplink_seid == pf->mac_seid) {
                                dev_info(&pf->pdev->dev,
                                         "rebuild of switch failed: %d, will try to set up simple PF connection\n",
                                         ret);
                                vsi->uplink_seid = pf->mac_seid;
                                break;
                        } else if (veb->uplink_seid == 0) {
                                dev_info(&pf->pdev->dev,
                                         "rebuild of orphan VEB failed: %d\n",
                                         ret);
                        }
                }
        }

        if (vsi->uplink_seid == pf->mac_seid) {
                dev_dbg(&pf->pdev->dev, "attempting to rebuild PF VSI\n");
                /* no VEB, so rebuild only the Main VSI */
                ret = i40e_add_vsi(vsi);
                if (ret) {
                        dev_info(&pf->pdev->dev,
                                 "rebuild of Main VSI failed: %d\n", ret);
                        goto end_unlock;
                }
        }

        if (vsi->mqprio_qopt.max_rate[0]) {
                u64 max_tx_rate = i40e_bw_bytes_to_mbits(vsi,
                                                  vsi->mqprio_qopt.max_rate[0]);
                u64 credits = 0;

                ret = i40e_set_bw_limit(vsi, vsi->seid, max_tx_rate);
                if (ret)
                        goto end_unlock;

                credits = max_tx_rate;
                do_div(credits, I40E_BW_CREDIT_DIVISOR);
                dev_dbg(&vsi->back->pdev->dev,
                        "Set tx rate of %llu Mbps (count of 50Mbps %llu) for vsi->seid %u\n",
                        max_tx_rate,
                        credits,
                        vsi->seid);
        }

        ret = i40e_rebuild_cloud_filters(vsi, vsi->seid);
        if (ret)
                goto end_unlock;

        /* PF Main VSI is rebuild by now, go ahead and rebuild channel VSIs
         * for this main VSI if they exist
         */
        ret = i40e_rebuild_channels(vsi);
        if (ret)
                goto end_unlock;

        /* Reconfigure hardware for allowing smaller MSS in the case
         * of TSO, so that we avoid the MDD being fired and causing
         * a reset in the case of small MSS+TSO.
         */
#define I40E_REG_MSS          0x000E64DC
#define I40E_REG_MSS_MIN_MASK 0x3FF0000
#define I40E_64BYTE_MSS       0x400000
        val = rd32(hw, I40E_REG_MSS);
        if ((val & I40E_REG_MSS_MIN_MASK) > I40E_64BYTE_MSS) {
                val &= ~I40E_REG_MSS_MIN_MASK;
                val |= I40E_64BYTE_MSS;
                wr32(hw, I40E_REG_MSS, val);
        }

        if (test_bit(I40E_HW_CAP_RESTART_AUTONEG, pf->hw.caps)) {
                msleep(75);
                ret = i40e_aq_set_link_restart_an(&pf->hw, true, NULL);
                if (ret)
                        dev_info(&pf->pdev->dev, "link restart failed, err %pe aq_err %s\n",
                                 ERR_PTR(ret),
                                 i40e_aq_str(&pf->hw,
                                             pf->hw.aq.asq_last_status));
        }
        /* reinit the misc interrupt */
        if (test_bit(I40E_FLAG_MSIX_ENA, pf->flags)) {
                ret = i40e_setup_misc_vector(pf);
                if (ret)
                        goto end_unlock;
        }

        /* Add a filter to drop all Flow control frames from any VSI from being
         * transmitted. By doing so we stop a malicious VF from sending out
         * PAUSE or PFC frames and potentially controlling traffic for other
         * PF/VF VSIs.
         * The FW can still send Flow control frames if enabled.
         */
        i40e_add_filter_to_drop_tx_flow_control_frames(&pf->hw,
                                                       pf->main_vsi_seid);

        /* restart the VSIs that were rebuilt and running before the reset */
        i40e_pf_unquiesce_all_vsi(pf);

        /* Release the RTNL lock before we start resetting VFs */
        if (!lock_acquired)
                rtnl_unlock();

        /* Restore promiscuous settings */
        ret = i40e_set_promiscuous(pf, pf->cur_promisc);
        if (ret)
                dev_warn(&pf->pdev->dev,
                         "Failed to restore promiscuous setting: %s, err %pe aq_err %s\n",
                         pf->cur_promisc ? "on" : "off",
                         ERR_PTR(ret),
                         i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));

        i40e_reset_all_vfs(pf, true);

        /* tell the firmware that we're starting */
        i40e_send_version(pf);

        /* We've already released the lock, so don't do it again */
        goto end_core_reset;

end_unlock:
        if (!lock_acquired)
                rtnl_unlock();
end_core_reset:
        clear_bit(__I40E_RESET_FAILED, pf->state);
clear_recovery:
        clear_bit(__I40E_RESET_RECOVERY_PENDING, pf->state);
        clear_bit(__I40E_TIMEOUT_RECOVERY_PENDING, pf->state);
}

/**
 * i40e_reset_and_rebuild - reset and rebuild using a saved config
 * @pf: board private structure
 * @reinit: if the Main VSI needs to re-initialized.
 * @lock_acquired: indicates whether or not the lock has been acquired
 * before this function was called.
 **/
static void i40e_reset_and_rebuild(struct i40e_pf *pf, bool reinit,
                                   bool lock_acquired)
{
        int ret;

        if (test_bit(__I40E_IN_REMOVE, pf->state))
                return;
        /* Now we wait for GRST to settle out.
         * We don't have to delete the VEBs or VSIs from the hw switch
         * because the reset will make them disappear.
         */
        ret = i40e_reset(pf);
        if (!ret)
                i40e_rebuild(pf, reinit, lock_acquired);
        else
                dev_err(&pf->pdev->dev, "%s: i40e_reset() FAILED", __func__);
}

/**
 * i40e_handle_reset_warning - prep for the PF to reset, reset and rebuild
 * @pf: board private structure
 *
 * Close up the VFs and other things in prep for a Core Reset,
 * then get ready to rebuild the world.
 * @lock_acquired: indicates whether or not the lock has been acquired
 * before this function was called.
 **/
static void i40e_handle_reset_warning(struct i40e_pf *pf, bool lock_acquired)
{
        i40e_prep_for_reset(pf);
        i40e_reset_and_rebuild(pf, false, lock_acquired);
}

/**
 * i40e_handle_mdd_event
 * @pf: pointer to the PF structure
 *
 * Called from the MDD irq handler to identify possibly malicious vfs
 **/
static void i40e_handle_mdd_event(struct i40e_pf *pf)
{
        struct i40e_hw *hw = &pf->hw;
        bool mdd_detected = false;
        struct i40e_vf *vf;
        u32 reg;
        int i;

        if (!test_bit(__I40E_MDD_EVENT_PENDING, pf->state))
                return;

        /* find what triggered the MDD event */
        reg = rd32(hw, I40E_GL_MDET_TX);
        if (reg & I40E_GL_MDET_TX_VALID_MASK) {
                u8 pf_num = FIELD_GET(I40E_GL_MDET_TX_PF_NUM_MASK, reg);
                u16 vf_num = FIELD_GET(I40E_GL_MDET_TX_VF_NUM_MASK, reg);
                u8 event = FIELD_GET(I40E_GL_MDET_TX_EVENT_MASK, reg);
                u16 queue = FIELD_GET(I40E_GL_MDET_TX_QUEUE_MASK, reg) -
                                pf->hw.func_caps.base_queue;
                if (netif_msg_tx_err(pf))
                        dev_info(&pf->pdev->dev, "Malicious Driver Detection event 0x%02x on TX queue %d PF number 0x%02x VF number 0x%02x\n",
                                 event, queue, pf_num, vf_num);
                wr32(hw, I40E_GL_MDET_TX, 0xffffffff);
                mdd_detected = true;
        }
        reg = rd32(hw, I40E_GL_MDET_RX);
        if (reg & I40E_GL_MDET_RX_VALID_MASK) {
                u8 func = FIELD_GET(I40E_GL_MDET_RX_FUNCTION_MASK, reg);
                u8 event = FIELD_GET(I40E_GL_MDET_RX_EVENT_MASK, reg);
                u16 queue = FIELD_GET(I40E_GL_MDET_RX_QUEUE_MASK, reg) -
                                pf->hw.func_caps.base_queue;
                if (netif_msg_rx_err(pf))
                        dev_info(&pf->pdev->dev, "Malicious Driver Detection event 0x%02x on RX queue %d of function 0x%02x\n",
                                 event, queue, func);
                wr32(hw, I40E_GL_MDET_RX, 0xffffffff);
                mdd_detected = true;
        }

        if (mdd_detected) {
                reg = rd32(hw, I40E_PF_MDET_TX);
                if (reg & I40E_PF_MDET_TX_VALID_MASK) {
                        wr32(hw, I40E_PF_MDET_TX, 0xFFFF);
                        dev_dbg(&pf->pdev->dev, "TX driver issue detected on PF\n");
                }
                reg = rd32(hw, I40E_PF_MDET_RX);
                if (reg & I40E_PF_MDET_RX_VALID_MASK) {
                        wr32(hw, I40E_PF_MDET_RX, 0xFFFF);
                        dev_dbg(&pf->pdev->dev, "RX driver issue detected on PF\n");
                }
        }

        /* see if one of the VFs needs its hand slapped */
        for (i = 0; i < pf->num_alloc_vfs && mdd_detected; i++) {
                vf = &(pf->vf[i]);
                reg = rd32(hw, I40E_VP_MDET_TX(i));
                if (reg & I40E_VP_MDET_TX_VALID_MASK) {
                        wr32(hw, I40E_VP_MDET_TX(i), 0xFFFF);
                        vf->num_mdd_events++;
                        dev_info(&pf->pdev->dev, "TX driver issue detected on VF %d\n",
                                 i);
                        dev_info(&pf->pdev->dev,
                                 "Use PF Control I/F to re-enable the VF\n");
                        set_bit(I40E_VF_STATE_DISABLED, &vf->vf_states);
                }

                reg = rd32(hw, I40E_VP_MDET_RX(i));
                if (reg & I40E_VP_MDET_RX_VALID_MASK) {
                        wr32(hw, I40E_VP_MDET_RX(i), 0xFFFF);
                        vf->num_mdd_events++;
                        dev_info(&pf->pdev->dev, "RX driver issue detected on VF %d\n",
                                 i);
                        dev_info(&pf->pdev->dev,
                                 "Use PF Control I/F to re-enable the VF\n");
                        set_bit(I40E_VF_STATE_DISABLED, &vf->vf_states);
                }
        }

        /* re-enable mdd interrupt cause */
        clear_bit(__I40E_MDD_EVENT_PENDING, pf->state);
        reg = rd32(hw, I40E_PFINT_ICR0_ENA);
        reg |=  I40E_PFINT_ICR0_ENA_MAL_DETECT_MASK;
        wr32(hw, I40E_PFINT_ICR0_ENA, reg);
        i40e_flush(hw);
}

/**
 * i40e_service_task - Run the driver's async subtasks
 * @work: pointer to work_struct containing our data
 **/
static void i40e_service_task(struct work_struct *work)
{
        struct i40e_pf *pf = container_of(work,
                                          struct i40e_pf,
                                          service_task);
        unsigned long start_time = jiffies;

        /* don't bother with service tasks if a reset is in progress */
        if (test_bit(__I40E_RESET_RECOVERY_PENDING, pf->state) ||
            test_bit(__I40E_SUSPENDED, pf->state))
                return;

        if (test_and_set_bit(__I40E_SERVICE_SCHED, pf->state))
                return;

        if (!test_bit(__I40E_RECOVERY_MODE, pf->state)) {
                i40e_detect_recover_hung(pf);
                i40e_sync_filters_subtask(pf);
                i40e_reset_subtask(pf);
                i40e_handle_mdd_event(pf);
                i40e_vc_process_vflr_event(pf);
                i40e_watchdog_subtask(pf);
                i40e_fdir_reinit_subtask(pf);
                if (test_and_clear_bit(__I40E_CLIENT_RESET, pf->state)) {
                        /* Client subtask will reopen next time through. */
                        i40e_notify_client_of_netdev_close(pf, true);
                } else {
                        i40e_client_subtask(pf);
                        if (test_and_clear_bit(__I40E_CLIENT_L2_CHANGE,
                                               pf->state))
                                i40e_notify_client_of_l2_param_changes(pf);
                }
                i40e_sync_filters_subtask(pf);
        } else {
                i40e_reset_subtask(pf);
        }

        i40e_clean_adminq_subtask(pf);

        /* flush memory to make sure state is correct before next watchdog */
        smp_mb__before_atomic();
        clear_bit(__I40E_SERVICE_SCHED, pf->state);

        /* If the tasks have taken longer than one timer cycle or there
         * is more work to be done, reschedule the service task now
         * rather than wait for the timer to tick again.
         */
        if (time_after(jiffies, (start_time + pf->service_timer_period)) ||
            test_bit(__I40E_ADMINQ_EVENT_PENDING, pf->state)             ||
            test_bit(__I40E_MDD_EVENT_PENDING, pf->state)                ||
            test_bit(__I40E_VFLR_EVENT_PENDING, pf->state))
                i40e_service_event_schedule(pf);
}

/**
 * i40e_service_timer - timer callback
 * @t: timer list pointer
 **/
static void i40e_service_timer(struct timer_list *t)
{
        struct i40e_pf *pf = from_timer(pf, t, service_timer);

        mod_timer(&pf->service_timer,
                  round_jiffies(jiffies + pf->service_timer_period));
        i40e_service_event_schedule(pf);
}

/**
 * i40e_set_num_rings_in_vsi - Determine number of rings in the VSI
 * @vsi: the VSI being configured
 **/
static int i40e_set_num_rings_in_vsi(struct i40e_vsi *vsi)
{
        struct i40e_pf *pf = vsi->back;

        switch (vsi->type) {
        case I40E_VSI_MAIN:
                vsi->alloc_queue_pairs = pf->num_lan_qps;
                if (!vsi->num_tx_desc)
                        vsi->num_tx_desc = ALIGN(I40E_DEFAULT_NUM_DESCRIPTORS,
                                                 I40E_REQ_DESCRIPTOR_MULTIPLE);
                if (!vsi->num_rx_desc)
                        vsi->num_rx_desc = ALIGN(I40E_DEFAULT_NUM_DESCRIPTORS,
                                                 I40E_REQ_DESCRIPTOR_MULTIPLE);
                if (test_bit(I40E_FLAG_MSIX_ENA, pf->flags))
                        vsi->num_q_vectors = pf->num_lan_msix;
                else
                        vsi->num_q_vectors = 1;

                break;

        case I40E_VSI_FDIR:
                vsi->alloc_queue_pairs = 1;
                vsi->num_tx_desc = ALIGN(I40E_FDIR_RING_COUNT,
                                         I40E_REQ_DESCRIPTOR_MULTIPLE);
                vsi->num_rx_desc = ALIGN(I40E_FDIR_RING_COUNT,
                                         I40E_REQ_DESCRIPTOR_MULTIPLE);
                vsi->num_q_vectors = pf->num_fdsb_msix;
                break;

        case I40E_VSI_VMDQ2:
                vsi->alloc_queue_pairs = pf->num_vmdq_qps;
                if (!vsi->num_tx_desc)
                        vsi->num_tx_desc = ALIGN(I40E_DEFAULT_NUM_DESCRIPTORS,
                                                 I40E_REQ_DESCRIPTOR_MULTIPLE);
                if (!vsi->num_rx_desc)
                        vsi->num_rx_desc = ALIGN(I40E_DEFAULT_NUM_DESCRIPTORS,
                                                 I40E_REQ_DESCRIPTOR_MULTIPLE);
                vsi->num_q_vectors = pf->num_vmdq_msix;
                break;

        case I40E_VSI_SRIOV:
                vsi->alloc_queue_pairs = pf->num_vf_qps;
                if (!vsi->num_tx_desc)
                        vsi->num_tx_desc = ALIGN(I40E_DEFAULT_NUM_DESCRIPTORS,
                                                 I40E_REQ_DESCRIPTOR_MULTIPLE);
                if (!vsi->num_rx_desc)
                        vsi->num_rx_desc = ALIGN(I40E_DEFAULT_NUM_DESCRIPTORS,
                                                 I40E_REQ_DESCRIPTOR_MULTIPLE);
                break;

        default:
                WARN_ON(1);
                return -ENODATA;
        }

        if (is_kdump_kernel()) {
                vsi->num_tx_desc = I40E_MIN_NUM_DESCRIPTORS;
                vsi->num_rx_desc = I40E_MIN_NUM_DESCRIPTORS;
        }

        return 0;
}

/**
 * i40e_vsi_alloc_arrays - Allocate queue and vector pointer arrays for the vsi
 * @vsi: VSI pointer
 * @alloc_qvectors: a bool to specify if q_vectors need to be allocated.
 *
 * On error: returns error code (negative)
 * On success: returns 0
 **/
static int i40e_vsi_alloc_arrays(struct i40e_vsi *vsi, bool alloc_qvectors)
{
        struct i40e_ring **next_rings;
        int size;
        int ret = 0;

        /* allocate memory for both Tx, XDP Tx and Rx ring pointers */
        size = sizeof(struct i40e_ring *) * vsi->alloc_queue_pairs *
               (i40e_enabled_xdp_vsi(vsi) ? 3 : 2);
        vsi->tx_rings = kzalloc(size, GFP_KERNEL);
        if (!vsi->tx_rings)
                return -ENOMEM;
        next_rings = vsi->tx_rings + vsi->alloc_queue_pairs;
        if (i40e_enabled_xdp_vsi(vsi)) {
                vsi->xdp_rings = next_rings;
                next_rings += vsi->alloc_queue_pairs;
        }
        vsi->rx_rings = next_rings;

        if (alloc_qvectors) {
                /* allocate memory for q_vector pointers */
                size = sizeof(struct i40e_q_vector *) * vsi->num_q_vectors;
                vsi->q_vectors = kzalloc(size, GFP_KERNEL);
                if (!vsi->q_vectors) {
                        ret = -ENOMEM;
                        goto err_vectors;
                }
        }
        return ret;

err_vectors:
        kfree(vsi->tx_rings);
        return ret;
}

/**
 * i40e_vsi_mem_alloc - Allocates the next available struct vsi in the PF
 * @pf: board private structure
 * @type: type of VSI
 *
 * On error: returns error code (negative)
 * On success: returns vsi index in PF (positive)
 **/
static int i40e_vsi_mem_alloc(struct i40e_pf *pf, enum i40e_vsi_type type)
{
        int ret = -ENODEV;
        struct i40e_vsi *vsi;
        int vsi_idx;
        int i;

        /* Need to protect the allocation of the VSIs at the PF level */
        mutex_lock(&pf->switch_mutex);

        /* VSI list may be fragmented if VSI creation/destruction has
         * been happening.  We can afford to do a quick scan to look
         * for any free VSIs in the list.
         *
         * find next empty vsi slot, looping back around if necessary
         */
        i = pf->next_vsi;
        while (i < pf->num_alloc_vsi && pf->vsi[i])
                i++;
        if (i >= pf->num_alloc_vsi) {
                i = 0;
                while (i < pf->next_vsi && pf->vsi[i])
                        i++;
        }

        if (i < pf->num_alloc_vsi && !pf->vsi[i]) {
                vsi_idx = i;             /* Found one! */
        } else {
                ret = -ENODEV;
                goto unlock_pf;  /* out of VSI slots! */
        }
        pf->next_vsi = ++i;

        vsi = kzalloc(sizeof(*vsi), GFP_KERNEL);
        if (!vsi) {
                ret = -ENOMEM;
                goto unlock_pf;
        }
        vsi->type = type;
        vsi->back = pf;
        set_bit(__I40E_VSI_DOWN, vsi->state);
        vsi->flags = 0;
        vsi->idx = vsi_idx;
        vsi->int_rate_limit = 0;
        vsi->rss_table_size = (vsi->type == I40E_VSI_MAIN) ?
                                pf->rss_table_size : 64;
        vsi->netdev_registered = false;
        vsi->work_limit = I40E_DEFAULT_IRQ_WORK;
        hash_init(vsi->mac_filter_hash);
        vsi->irqs_ready = false;

        if (type == I40E_VSI_MAIN) {
                vsi->af_xdp_zc_qps = bitmap_zalloc(pf->num_lan_qps, GFP_KERNEL);
                if (!vsi->af_xdp_zc_qps)
                        goto err_rings;
        }

        ret = i40e_set_num_rings_in_vsi(vsi);
        if (ret)
                goto err_rings;

        ret = i40e_vsi_alloc_arrays(vsi, true);
        if (ret)
                goto err_rings;

        /* Setup default MSIX irq handler for VSI */
        i40e_vsi_setup_irqhandler(vsi, i40e_msix_clean_rings);

        /* Initialize VSI lock */
        spin_lock_init(&vsi->mac_filter_hash_lock);
        pf->vsi[vsi_idx] = vsi;
        ret = vsi_idx;
        goto unlock_pf;

err_rings:
        bitmap_free(vsi->af_xdp_zc_qps);
        pf->next_vsi = i - 1;
        kfree(vsi);
unlock_pf:
        mutex_unlock(&pf->switch_mutex);
        return ret;
}

/**
 * i40e_vsi_free_arrays - Free queue and vector pointer arrays for the VSI
 * @vsi: VSI pointer
 * @free_qvectors: a bool to specify if q_vectors need to be freed.
 *
 * On error: returns error code (negative)
 * On success: returns 0
 **/
static void i40e_vsi_free_arrays(struct i40e_vsi *vsi, bool free_qvectors)
{
        /* free the ring and vector containers */
        if (free_qvectors) {
                kfree(vsi->q_vectors);
                vsi->q_vectors = NULL;
        }
        kfree(vsi->tx_rings);
        vsi->tx_rings = NULL;
        vsi->rx_rings = NULL;
        vsi->xdp_rings = NULL;
}

/**
 * i40e_clear_rss_config_user - clear the user configured RSS hash keys
 * and lookup table
 * @vsi: Pointer to VSI structure
 */
static void i40e_clear_rss_config_user(struct i40e_vsi *vsi)
{
        if (!vsi)
                return;

        kfree(vsi->rss_hkey_user);
        vsi->rss_hkey_user = NULL;

        kfree(vsi->rss_lut_user);
        vsi->rss_lut_user = NULL;
}

/**
 * i40e_vsi_clear - Deallocate the VSI provided
 * @vsi: the VSI being un-configured
 **/
static int i40e_vsi_clear(struct i40e_vsi *vsi)
{
        struct i40e_pf *pf;

        if (!vsi)
                return 0;

        if (!vsi->back)
                goto free_vsi;
        pf = vsi->back;

        mutex_lock(&pf->switch_mutex);
        if (!pf->vsi[vsi->idx]) {
                dev_err(&pf->pdev->dev, "pf->vsi[%d] is NULL, just free vsi[%d](type %d)\n",
                        vsi->idx, vsi->idx, vsi->type);
                goto unlock_vsi;
        }

        if (pf->vsi[vsi->idx] != vsi) {
                dev_err(&pf->pdev->dev,
                        "pf->vsi[%d](type %d) != vsi[%d](type %d): no free!\n",
                        pf->vsi[vsi->idx]->idx,
                        pf->vsi[vsi->idx]->type,
                        vsi->idx, vsi->type);
                goto unlock_vsi;
        }

        /* updates the PF for this cleared vsi */
        i40e_put_lump(pf->qp_pile, vsi->base_queue, vsi->idx);
        i40e_put_lump(pf->irq_pile, vsi->base_vector, vsi->idx);

        bitmap_free(vsi->af_xdp_zc_qps);
        i40e_vsi_free_arrays(vsi, true);
        i40e_clear_rss_config_user(vsi);

        pf->vsi[vsi->idx] = NULL;
        if (vsi->idx < pf->next_vsi)
                pf->next_vsi = vsi->idx;

unlock_vsi:
        mutex_unlock(&pf->switch_mutex);
free_vsi:
        kfree(vsi);

        return 0;
}

/**
 * i40e_vsi_clear_rings - Deallocates the Rx and Tx rings for the provided VSI
 * @vsi: the VSI being cleaned
 **/
static void i40e_vsi_clear_rings(struct i40e_vsi *vsi)
{
        int i;

        if (vsi->tx_rings && vsi->tx_rings[0]) {
                for (i = 0; i < vsi->alloc_queue_pairs; i++) {
                        kfree_rcu(vsi->tx_rings[i], rcu);
                        WRITE_ONCE(vsi->tx_rings[i], NULL);
                        WRITE_ONCE(vsi->rx_rings[i], NULL);
                        if (vsi->xdp_rings)
                                WRITE_ONCE(vsi->xdp_rings[i], NULL);
                }
        }
}

/**
 * i40e_alloc_rings - Allocates the Rx and Tx rings for the provided VSI
 * @vsi: the VSI being configured
 **/
static int i40e_alloc_rings(struct i40e_vsi *vsi)
{
        int i, qpv = i40e_enabled_xdp_vsi(vsi) ? 3 : 2;
        struct i40e_pf *pf = vsi->back;
        struct i40e_ring *ring;

        /* Set basic values in the rings to be used later during open() */
        for (i = 0; i < vsi->alloc_queue_pairs; i++) {
                /* allocate space for both Tx and Rx in one shot */
                ring = kcalloc(qpv, sizeof(struct i40e_ring), GFP_KERNEL);
                if (!ring)
                        goto err_out;

                ring->queue_index = i;
                ring->reg_idx = vsi->base_queue + i;
                ring->ring_active = false;
                ring->vsi = vsi;
                ring->netdev = vsi->netdev;
                ring->dev = &pf->pdev->dev;
                ring->count = vsi->num_tx_desc;
                ring->size = 0;
                ring->dcb_tc = 0;
                if (test_bit(I40E_HW_CAP_WB_ON_ITR, vsi->back->hw.caps))
                        ring->flags = I40E_TXR_FLAGS_WB_ON_ITR;
                ring->itr_setting = pf->tx_itr_default;
                WRITE_ONCE(vsi->tx_rings[i], ring++);

                if (!i40e_enabled_xdp_vsi(vsi))
                        goto setup_rx;

                ring->queue_index = vsi->alloc_queue_pairs + i;
                ring->reg_idx = vsi->base_queue + ring->queue_index;
                ring->ring_active = false;
                ring->vsi = vsi;
                ring->netdev = NULL;
                ring->dev = &pf->pdev->dev;
                ring->count = vsi->num_tx_desc;
                ring->size = 0;
                ring->dcb_tc = 0;
                if (test_bit(I40E_HW_CAP_WB_ON_ITR, vsi->back->hw.caps))
                        ring->flags = I40E_TXR_FLAGS_WB_ON_ITR;
                set_ring_xdp(ring);
                ring->itr_setting = pf->tx_itr_default;
                WRITE_ONCE(vsi->xdp_rings[i], ring++);

setup_rx:
                ring->queue_index = i;
                ring->reg_idx = vsi->base_queue + i;
                ring->ring_active = false;
                ring->vsi = vsi;
                ring->netdev = vsi->netdev;
                ring->dev = &pf->pdev->dev;
                ring->count = vsi->num_rx_desc;
                ring->size = 0;
                ring->dcb_tc = 0;
                ring->itr_setting = pf->rx_itr_default;
                WRITE_ONCE(vsi->rx_rings[i], ring);
        }

        return 0;

err_out:
        i40e_vsi_clear_rings(vsi);
        return -ENOMEM;
}

/**
 * i40e_reserve_msix_vectors - Reserve MSI-X vectors in the kernel
 * @pf: board private structure
 * @vectors: the number of MSI-X vectors to request
 *
 * Returns the number of vectors reserved, or error
 **/
static int i40e_reserve_msix_vectors(struct i40e_pf *pf, int vectors)
{
        vectors = pci_enable_msix_range(pf->pdev, pf->msix_entries,
                                        I40E_MIN_MSIX, vectors);
        if (vectors < 0) {
                dev_info(&pf->pdev->dev,
                         "MSI-X vector reservation failed: %d\n", vectors);
                vectors = 0;
        }

        return vectors;
}

/**
 * i40e_init_msix - Setup the MSIX capability
 * @pf: board private structure
 *
 * Work with the OS to set up the MSIX vectors needed.
 *
 * Returns the number of vectors reserved or negative on failure
 **/
static int i40e_init_msix(struct i40e_pf *pf)
{
        struct i40e_hw *hw = &pf->hw;
        int cpus, extra_vectors;
        int vectors_left;
        int v_budget, i;
        int v_actual;
        int iwarp_requested = 0;

        if (!test_bit(I40E_FLAG_MSIX_ENA, pf->flags))
                return -ENODEV;

        /* The number of vectors we'll request will be comprised of:
         *   - Add 1 for "other" cause for Admin Queue events, etc.
         *   - The number of LAN queue pairs
         *      - Queues being used for RSS.
         *              We don't need as many as max_rss_size vectors.
         *              use rss_size instead in the calculation since that
         *              is governed by number of cpus in the system.
         *      - assumes symmetric Tx/Rx pairing
         *   - The number of VMDq pairs
         *   - The CPU count within the NUMA node if iWARP is enabled
         * Once we count this up, try the request.
         *
         * If we can't get what we want, we'll simplify to nearly nothing
         * and try again.  If that still fails, we punt.
         */
        vectors_left = hw->func_caps.num_msix_vectors;
        v_budget = 0;

        /* reserve one vector for miscellaneous handler */
        if (vectors_left) {
                v_budget++;
                vectors_left--;
        }

        /* reserve some vectors for the main PF traffic queues. Initially we
         * only reserve at most 50% of the available vectors, in the case that
         * the number of online CPUs is large. This ensures that we can enable
         * extra features as well. Once we've enabled the other features, we
         * will use any remaining vectors to reach as close as we can to the
         * number of online CPUs.
         */
        cpus = num_online_cpus();
        pf->num_lan_msix = min_t(int, cpus, vectors_left / 2);
        vectors_left -= pf->num_lan_msix;

        /* reserve one vector for sideband flow director */
        if (test_bit(I40E_FLAG_FD_SB_ENA, pf->flags)) {
                if (vectors_left) {
                        pf->num_fdsb_msix = 1;
                        v_budget++;
                        vectors_left--;
                } else {
                        pf->num_fdsb_msix = 0;
                }
        }

        /* can we reserve enough for iWARP? */
        if (test_bit(I40E_FLAG_IWARP_ENA, pf->flags)) {
                iwarp_requested = pf->num_iwarp_msix;

                if (!vectors_left)
                        pf->num_iwarp_msix = 0;
                else if (vectors_left < pf->num_iwarp_msix)
                        pf->num_iwarp_msix = 1;
                v_budget += pf->num_iwarp_msix;
                vectors_left -= pf->num_iwarp_msix;
        }

        /* any vectors left over go for VMDq support */
        if (test_bit(I40E_FLAG_VMDQ_ENA, pf->flags)) {
                if (!vectors_left) {
                        pf->num_vmdq_msix = 0;
                        pf->num_vmdq_qps = 0;
                } else {
                        int vmdq_vecs_wanted =
                                pf->num_vmdq_vsis * pf->num_vmdq_qps;
                        int vmdq_vecs =
                                min_t(int, vectors_left, vmdq_vecs_wanted);

                        /* if we're short on vectors for what's desired, we limit
                         * the queues per vmdq.  If this is still more than are
                         * available, the user will need to change the number of
                         * queues/vectors used by the PF later with the ethtool
                         * channels command
                         */
                        if (vectors_left < vmdq_vecs_wanted) {
                                pf->num_vmdq_qps = 1;
                                vmdq_vecs_wanted = pf->num_vmdq_vsis;
                                vmdq_vecs = min_t(int,
                                                  vectors_left,
                                                  vmdq_vecs_wanted);
                        }
                        pf->num_vmdq_msix = pf->num_vmdq_qps;

                        v_budget += vmdq_vecs;
                        vectors_left -= vmdq_vecs;
                }
        }

        /* On systems with a large number of SMP cores, we previously limited
         * the number of vectors for num_lan_msix to be at most 50% of the
         * available vectors, to allow for other features. Now, we add back
         * the remaining vectors. However, we ensure that the total
         * num_lan_msix will not exceed num_online_cpus(). To do this, we
         * calculate the number of vectors we can add without going over the
         * cap of CPUs. For systems with a small number of CPUs this will be
         * zero.
         */
        extra_vectors = min_t(int, cpus - pf->num_lan_msix, vectors_left);
        pf->num_lan_msix += extra_vectors;
        vectors_left -= extra_vectors;

        WARN(vectors_left < 0,
             "Calculation of remaining vectors underflowed. This is an accounting bug when determining total MSI-X vectors.\n");

        v_budget += pf->num_lan_msix;
        pf->msix_entries = kcalloc(v_budget, sizeof(struct msix_entry),
                                   GFP_KERNEL);
        if (!pf->msix_entries)
                return -ENOMEM;

        for (i = 0; i < v_budget; i++)
                pf->msix_entries[i].entry = i;
        v_actual = i40e_reserve_msix_vectors(pf, v_budget);

        if (v_actual < I40E_MIN_MSIX) {
                clear_bit(I40E_FLAG_MSIX_ENA, pf->flags);
                kfree(pf->msix_entries);
                pf->msix_entries = NULL;
                pci_disable_msix(pf->pdev);
                return -ENODEV;

        } else if (v_actual == I40E_MIN_MSIX) {
                /* Adjust for minimal MSIX use */
                pf->num_vmdq_vsis = 0;
                pf->num_vmdq_qps = 0;
                pf->num_lan_qps = 1;
                pf->num_lan_msix = 1;

        } else if (v_actual != v_budget) {
                /* If we have limited resources, we will start with no vectors
                 * for the special features and then allocate vectors to some
                 * of these features based on the policy and at the end disable
                 * the features that did not get any vectors.
                 */
                int vec;

                dev_info(&pf->pdev->dev,
                         "MSI-X vector limit reached with %d, wanted %d, attempting to redistribute vectors\n",
                         v_actual, v_budget);
                /* reserve the misc vector */
                vec = v_actual - 1;

                /* Scale vector usage down */
                pf->num_vmdq_msix = 1;    /* force VMDqs to only one vector */
                pf->num_vmdq_vsis = 1;
                pf->num_vmdq_qps = 1;

                /* partition out the remaining vectors */
                switch (vec) {
                case 2:
                        pf->num_lan_msix = 1;
                        break;
                case 3:
                        if (test_bit(I40E_FLAG_IWARP_ENA, pf->flags)) {
                                pf->num_lan_msix = 1;
                                pf->num_iwarp_msix = 1;
                        } else {
                                pf->num_lan_msix = 2;
                        }
                        break;
                default:
                        if (test_bit(I40E_FLAG_IWARP_ENA, pf->flags)) {
                                pf->num_iwarp_msix = min_t(int, (vec / 3),
                                                 iwarp_requested);
                                pf->num_vmdq_vsis = min_t(int, (vec / 3),
                                                  I40E_DEFAULT_NUM_VMDQ_VSI);
                        } else {
                                pf->num_vmdq_vsis = min_t(int, (vec / 2),
                                                  I40E_DEFAULT_NUM_VMDQ_VSI);
                        }
                        if (test_bit(I40E_FLAG_FD_SB_ENA, pf->flags)) {
                                pf->num_fdsb_msix = 1;
                                vec--;
                        }
                        pf->num_lan_msix = min_t(int,
                               (vec - (pf->num_iwarp_msix + pf->num_vmdq_vsis)),
                                                              pf->num_lan_msix);
                        pf->num_lan_qps = pf->num_lan_msix;
                        break;
                }
        }

        if (test_bit(I40E_FLAG_FD_SB_ENA, pf->flags) && pf->num_fdsb_msix == 0) {
                dev_info(&pf->pdev->dev, "Sideband Flowdir disabled, not enough MSI-X vectors\n");
                clear_bit(I40E_FLAG_FD_SB_ENA, pf->flags);
                set_bit(I40E_FLAG_FD_SB_INACTIVE, pf->flags);
        }
        if (test_bit(I40E_FLAG_VMDQ_ENA, pf->flags) && pf->num_vmdq_msix == 0) {
                dev_info(&pf->pdev->dev, "VMDq disabled, not enough MSI-X vectors\n");
                clear_bit(I40E_FLAG_VMDQ_ENA, pf->flags);
        }

        if (test_bit(I40E_FLAG_IWARP_ENA, pf->flags) &&
            pf->num_iwarp_msix == 0) {
                dev_info(&pf->pdev->dev, "IWARP disabled, not enough MSI-X vectors\n");
                clear_bit(I40E_FLAG_IWARP_ENA, pf->flags);
        }
        i40e_debug(&pf->hw, I40E_DEBUG_INIT,
                   "MSI-X vector distribution: PF %d, VMDq %d, FDSB %d, iWARP %d\n",
                   pf->num_lan_msix,
                   pf->num_vmdq_msix * pf->num_vmdq_vsis,
                   pf->num_fdsb_msix,
                   pf->num_iwarp_msix);

        return v_actual;
}

/**
 * i40e_vsi_alloc_q_vector - Allocate memory for a single interrupt vector
 * @vsi: the VSI being configured
 * @v_idx: index of the vector in the vsi struct
 *
 * We allocate one q_vector.  If allocation fails we return -ENOMEM.
 **/
static int i40e_vsi_alloc_q_vector(struct i40e_vsi *vsi, int v_idx)
{
        struct i40e_q_vector *q_vector;

        /* allocate q_vector */
        q_vector = kzalloc(sizeof(struct i40e_q_vector), GFP_KERNEL);
        if (!q_vector)
                return -ENOMEM;

        q_vector->vsi = vsi;
        q_vector->v_idx = v_idx;
        cpumask_copy(&q_vector->affinity_mask, cpu_possible_mask);

        if (vsi->netdev)
                netif_napi_add(vsi->netdev, &q_vector->napi, i40e_napi_poll);

        /* tie q_vector and vsi together */
        vsi->q_vectors[v_idx] = q_vector;

        return 0;
}

/**
 * i40e_vsi_alloc_q_vectors - Allocate memory for interrupt vectors
 * @vsi: the VSI being configured
 *
 * We allocate one q_vector per queue interrupt.  If allocation fails we
 * return -ENOMEM.
 **/
static int i40e_vsi_alloc_q_vectors(struct i40e_vsi *vsi)
{
        struct i40e_pf *pf = vsi->back;
        int err, v_idx, num_q_vectors;

        /* if not MSIX, give the one vector only to the LAN VSI */
        if (test_bit(I40E_FLAG_MSIX_ENA, pf->flags))
                num_q_vectors = vsi->num_q_vectors;
        else if (vsi->type == I40E_VSI_MAIN)
                num_q_vectors = 1;
        else
                return -EINVAL;

        for (v_idx = 0; v_idx < num_q_vectors; v_idx++) {
                err = i40e_vsi_alloc_q_vector(vsi, v_idx);
                if (err)
                        goto err_out;
        }

        return 0;

err_out:
        while (v_idx--)
                i40e_free_q_vector(vsi, v_idx);

        return err;
}

/**
 * i40e_init_interrupt_scheme - Determine proper interrupt scheme
 * @pf: board private structure to initialize
 **/
static int i40e_init_interrupt_scheme(struct i40e_pf *pf)
{
        int vectors = 0;
        ssize_t size;

        if (test_bit(I40E_FLAG_MSIX_ENA, pf->flags)) {
                vectors = i40e_init_msix(pf);
                if (vectors < 0) {
                        clear_bit(I40E_FLAG_MSIX_ENA, pf->flags);
                        clear_bit(I40E_FLAG_IWARP_ENA, pf->flags);
                        clear_bit(I40E_FLAG_RSS_ENA, pf->flags);
                        clear_bit(I40E_FLAG_DCB_CAPABLE, pf->flags);
                        clear_bit(I40E_FLAG_DCB_ENA, pf->flags);
                        clear_bit(I40E_FLAG_SRIOV_ENA, pf->flags);
                        clear_bit(I40E_FLAG_FD_SB_ENA, pf->flags);
                        clear_bit(I40E_FLAG_FD_ATR_ENA, pf->flags);
                        clear_bit(I40E_FLAG_VMDQ_ENA, pf->flags);
                        set_bit(I40E_FLAG_FD_SB_INACTIVE, pf->flags);

                        /* rework the queue expectations without MSIX */
                        i40e_determine_queue_usage(pf);
                }
        }

        if (!test_bit(I40E_FLAG_MSIX_ENA, pf->flags) &&
            test_bit(I40E_FLAG_MSI_ENA, pf->flags)) {
                dev_info(&pf->pdev->dev, "MSI-X not available, trying MSI\n");
                vectors = pci_enable_msi(pf->pdev);
                if (vectors < 0) {
                        dev_info(&pf->pdev->dev, "MSI init failed - %d\n",
                                 vectors);
                        clear_bit(I40E_FLAG_MSI_ENA, pf->flags);
                }
                vectors = 1;  /* one MSI or Legacy vector */
        }

        if (!test_bit(I40E_FLAG_MSI_ENA, pf->flags) &&
            !test_bit(I40E_FLAG_MSIX_ENA, pf->flags))
                dev_info(&pf->pdev->dev, "MSI-X and MSI not available, falling back to Legacy IRQ\n");

        /* set up vector assignment tracking */
        size = sizeof(struct i40e_lump_tracking) + (sizeof(u16) * vectors);
        pf->irq_pile = kzalloc(size, GFP_KERNEL);
        if (!pf->irq_pile)
                return -ENOMEM;

        pf->irq_pile->num_entries = vectors;

        /* track first vector for misc interrupts, ignore return */
        (void)i40e_get_lump(pf, pf->irq_pile, 1, I40E_PILE_VALID_BIT - 1);

        return 0;
}

/**
 * i40e_restore_interrupt_scheme - Restore the interrupt scheme
 * @pf: private board data structure
 *
 * Restore the interrupt scheme that was cleared when we suspended the
 * device. This should be called during resume to re-allocate the q_vectors
 * and reacquire IRQs.
 */
static int i40e_restore_interrupt_scheme(struct i40e_pf *pf)
{
        struct i40e_vsi *vsi;
        int err, i;

        /* We cleared the MSI and MSI-X flags when disabling the old interrupt
         * scheme. We need to re-enabled them here in order to attempt to
         * re-acquire the MSI or MSI-X vectors
         */
        set_bit(I40E_FLAG_MSI_ENA, pf->flags);
        set_bit(I40E_FLAG_MSIX_ENA, pf->flags);

        err = i40e_init_interrupt_scheme(pf);
        if (err)
                return err;

        /* Now that we've re-acquired IRQs, we need to remap the vectors and
         * rings together again.
         */
        i40e_pf_for_each_vsi(pf, i, vsi) {
                err = i40e_vsi_alloc_q_vectors(vsi);
                if (err)
                        goto err_unwind;

                i40e_vsi_map_rings_to_vectors(vsi);
        }

        err = i40e_setup_misc_vector(pf);
        if (err)
                goto err_unwind;

        if (test_bit(I40E_FLAG_IWARP_ENA, pf->flags))
                i40e_client_update_msix_info(pf);

        return 0;

err_unwind:
        while (i--) {
                if (pf->vsi[i])
                        i40e_vsi_free_q_vectors(pf->vsi[i]);
        }

        return err;
}

/**
 * i40e_setup_misc_vector_for_recovery_mode - Setup the misc vector to handle
 * non queue events in recovery mode
 * @pf: board private structure
 *
 * This sets up the handler for MSIX 0 or MSI/legacy, which is used to manage
 * the non-queue interrupts, e.g. AdminQ and errors in recovery mode.
 * This is handled differently than in recovery mode since no Tx/Rx resources
 * are being allocated.
 **/
static int i40e_setup_misc_vector_for_recovery_mode(struct i40e_pf *pf)
{
        int err;

        if (test_bit(I40E_FLAG_MSIX_ENA, pf->flags)) {
                err = i40e_setup_misc_vector(pf);

                if (err) {
                        dev_info(&pf->pdev->dev,
                                 "MSI-X misc vector request failed, error %d\n",
                                 err);
                        return err;
                }
        } else {
                u32 flags = test_bit(I40E_FLAG_MSI_ENA, pf->flags) ? 0 : IRQF_SHARED;

                err = request_irq(pf->pdev->irq, i40e_intr, flags,
                                  pf->int_name, pf);

                if (err) {
                        dev_info(&pf->pdev->dev,
                                 "MSI/legacy misc vector request failed, error %d\n",
                                 err);
                        return err;
                }
                i40e_enable_misc_int_causes(pf);
                i40e_irq_dynamic_enable_icr0(pf);
        }

        return 0;
}

/**
 * i40e_setup_misc_vector - Setup the misc vector to handle non queue events
 * @pf: board private structure
 *
 * This sets up the handler for MSIX 0, which is used to manage the
 * non-queue interrupts, e.g. AdminQ and errors.  This is not used
 * when in MSI or Legacy interrupt mode.
 **/
static int i40e_setup_misc_vector(struct i40e_pf *pf)
{
        struct i40e_hw *hw = &pf->hw;
        int err = 0;

        /* Only request the IRQ once, the first time through. */
        if (!test_and_set_bit(__I40E_MISC_IRQ_REQUESTED, pf->state)) {
                err = request_irq(pf->msix_entries[0].vector,
                                  i40e_intr, 0, pf->int_name, pf);
                if (err) {
                        clear_bit(__I40E_MISC_IRQ_REQUESTED, pf->state);
                        dev_info(&pf->pdev->dev,
                                 "request_irq for %s failed: %d\n",
                                 pf->int_name, err);
                        return -EFAULT;
                }
        }

        i40e_enable_misc_int_causes(pf);

        /* associate no queues to the misc vector */
        wr32(hw, I40E_PFINT_LNKLST0, I40E_QUEUE_END_OF_LIST);
        wr32(hw, I40E_PFINT_ITR0(I40E_RX_ITR), I40E_ITR_8K >> 1);

        i40e_flush(hw);

        i40e_irq_dynamic_enable_icr0(pf);

        return err;
}

/**
 * i40e_get_rss_aq - Get RSS keys and lut by using AQ commands
 * @vsi: Pointer to vsi structure
 * @seed: Buffter to store the hash keys
 * @lut: Buffer to store the lookup table entries
 * @lut_size: Size of buffer to store the lookup table entries
 *
 * Return 0 on success, negative on failure
 */
static int i40e_get_rss_aq(struct i40e_vsi *vsi, const u8 *seed,
                           u8 *lut, u16 lut_size)
{
        struct i40e_pf *pf = vsi->back;
        struct i40e_hw *hw = &pf->hw;
        int ret = 0;

        if (seed) {
                ret = i40e_aq_get_rss_key(hw, vsi->id,
                        (struct i40e_aqc_get_set_rss_key_data *)seed);
                if (ret) {
                        dev_info(&pf->pdev->dev,
                                 "Cannot get RSS key, err %pe aq_err %s\n",
                                 ERR_PTR(ret),
                                 i40e_aq_str(&pf->hw,
                                             pf->hw.aq.asq_last_status));
                        return ret;
                }
        }

        if (lut) {
                bool pf_lut = vsi->type == I40E_VSI_MAIN;

                ret = i40e_aq_get_rss_lut(hw, vsi->id, pf_lut, lut, lut_size);
                if (ret) {
                        dev_info(&pf->pdev->dev,
                                 "Cannot get RSS lut, err %pe aq_err %s\n",
                                 ERR_PTR(ret),
                                 i40e_aq_str(&pf->hw,
                                             pf->hw.aq.asq_last_status));
                        return ret;
                }
        }

        return ret;
}

/**
 * i40e_config_rss_reg - Configure RSS keys and lut by writing registers
 * @vsi: Pointer to vsi structure
 * @seed: RSS hash seed
 * @lut: Lookup table
 * @lut_size: Lookup table size
 *
 * Returns 0 on success, negative on failure
 **/
static int i40e_config_rss_reg(struct i40e_vsi *vsi, const u8 *seed,
                               const u8 *lut, u16 lut_size)
{
        struct i40e_pf *pf = vsi->back;
        struct i40e_hw *hw = &pf->hw;
        u16 vf_id = vsi->vf_id;
        u8 i;

        /* Fill out hash function seed */
        if (seed) {
                u32 *seed_dw = (u32 *)seed;

                if (vsi->type == I40E_VSI_MAIN) {
                        for (i = 0; i <= I40E_PFQF_HKEY_MAX_INDEX; i++)
                                wr32(hw, I40E_PFQF_HKEY(i), seed_dw[i]);
                } else if (vsi->type == I40E_VSI_SRIOV) {
                        for (i = 0; i <= I40E_VFQF_HKEY1_MAX_INDEX; i++)
                                wr32(hw, I40E_VFQF_HKEY1(i, vf_id), seed_dw[i]);
                } else {
                        dev_err(&pf->pdev->dev, "Cannot set RSS seed - invalid VSI type\n");
                }
        }

        if (lut) {
                u32 *lut_dw = (u32 *)lut;

                if (vsi->type == I40E_VSI_MAIN) {
                        if (lut_size != I40E_HLUT_ARRAY_SIZE)
                                return -EINVAL;
                        for (i = 0; i <= I40E_PFQF_HLUT_MAX_INDEX; i++)
                                wr32(hw, I40E_PFQF_HLUT(i), lut_dw[i]);
                } else if (vsi->type == I40E_VSI_SRIOV) {
                        if (lut_size != I40E_VF_HLUT_ARRAY_SIZE)
                                return -EINVAL;
                        for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++)
                                wr32(hw, I40E_VFQF_HLUT1(i, vf_id), lut_dw[i]);
                } else {
                        dev_err(&pf->pdev->dev, "Cannot set RSS LUT - invalid VSI type\n");
                }
        }
        i40e_flush(hw);

        return 0;
}

/**
 * i40e_get_rss_reg - Get the RSS keys and lut by reading registers
 * @vsi: Pointer to VSI structure
 * @seed: Buffer to store the keys
 * @lut: Buffer to store the lookup table entries
 * @lut_size: Size of buffer to store the lookup table entries
 *
 * Returns 0 on success, negative on failure
 */
static int i40e_get_rss_reg(struct i40e_vsi *vsi, u8 *seed,
                            u8 *lut, u16 lut_size)
{
        struct i40e_pf *pf = vsi->back;
        struct i40e_hw *hw = &pf->hw;
        u16 i;

        if (seed) {
                u32 *seed_dw = (u32 *)seed;

                for (i = 0; i <= I40E_PFQF_HKEY_MAX_INDEX; i++)
                        seed_dw[i] = i40e_read_rx_ctl(hw, I40E_PFQF_HKEY(i));
        }
        if (lut) {
                u32 *lut_dw = (u32 *)lut;

                if (lut_size != I40E_HLUT_ARRAY_SIZE)
                        return -EINVAL;
                for (i = 0; i <= I40E_PFQF_HLUT_MAX_INDEX; i++)
                        lut_dw[i] = rd32(hw, I40E_PFQF_HLUT(i));
        }

        return 0;
}

/**
 * i40e_config_rss - Configure RSS keys and lut
 * @vsi: Pointer to VSI structure
 * @seed: RSS hash seed
 * @lut: Lookup table
 * @lut_size: Lookup table size
 *
 * Returns 0 on success, negative on failure
 */
int i40e_config_rss(struct i40e_vsi *vsi, u8 *seed, u8 *lut, u16 lut_size)
{
        struct i40e_pf *pf = vsi->back;

        if (test_bit(I40E_HW_CAP_RSS_AQ, pf->hw.caps))
                return i40e_config_rss_aq(vsi, seed, lut, lut_size);
        else
                return i40e_config_rss_reg(vsi, seed, lut, lut_size);
}

/**
 * i40e_get_rss - Get RSS keys and lut
 * @vsi: Pointer to VSI structure
 * @seed: Buffer to store the keys
 * @lut: Buffer to store the lookup table entries
 * @lut_size: Size of buffer to store the lookup table entries
 *
 * Returns 0 on success, negative on failure
 */
int i40e_get_rss(struct i40e_vsi *vsi, u8 *seed, u8 *lut, u16 lut_size)
{
        struct i40e_pf *pf = vsi->back;

        if (test_bit(I40E_HW_CAP_RSS_AQ, pf->hw.caps))
                return i40e_get_rss_aq(vsi, seed, lut, lut_size);
        else
                return i40e_get_rss_reg(vsi, seed, lut, lut_size);
}

/**
 * i40e_fill_rss_lut - Fill the RSS lookup table with default values
 * @pf: Pointer to board private structure
 * @lut: Lookup table
 * @rss_table_size: Lookup table size
 * @rss_size: Range of queue number for hashing
 */
void i40e_fill_rss_lut(struct i40e_pf *pf, u8 *lut,
                       u16 rss_table_size, u16 rss_size)
{
        u16 i;

        for (i = 0; i < rss_table_size; i++)
                lut[i] = i % rss_size;
}

/**
 * i40e_pf_config_rss - Prepare for RSS if used
 * @pf: board private structure
 **/
static int i40e_pf_config_rss(struct i40e_pf *pf)
{
        struct i40e_vsi *vsi = i40e_pf_get_main_vsi(pf);
        u8 seed[I40E_HKEY_ARRAY_SIZE];
        u8 *lut;
        struct i40e_hw *hw = &pf->hw;
        u32 reg_val;
        u64 hena;
        int ret;

        /* By default we enable TCP/UDP with IPv4/IPv6 ptypes */
        hena = (u64)i40e_read_rx_ctl(hw, I40E_PFQF_HENA(0)) |
                ((u64)i40e_read_rx_ctl(hw, I40E_PFQF_HENA(1)) << 32);
        hena |= i40e_pf_get_default_rss_hena(pf);

        i40e_write_rx_ctl(hw, I40E_PFQF_HENA(0), (u32)hena);
        i40e_write_rx_ctl(hw, I40E_PFQF_HENA(1), (u32)(hena >> 32));

        /* Determine the RSS table size based on the hardware capabilities */
        reg_val = i40e_read_rx_ctl(hw, I40E_PFQF_CTL_0);
        reg_val = (pf->rss_table_size == 512) ?
                        (reg_val | I40E_PFQF_CTL_0_HASHLUTSIZE_512) :
                        (reg_val & ~I40E_PFQF_CTL_0_HASHLUTSIZE_512);
        i40e_write_rx_ctl(hw, I40E_PFQF_CTL_0, reg_val);

        /* Determine the RSS size of the VSI */
        if (!vsi->rss_size) {
                u16 qcount;
                /* If the firmware does something weird during VSI init, we
                 * could end up with zero TCs. Check for that to avoid
                 * divide-by-zero. It probably won't pass traffic, but it also
                 * won't panic.
                 */
                qcount = vsi->num_queue_pairs /
                         (vsi->tc_config.numtc ? vsi->tc_config.numtc : 1);
                vsi->rss_size = min_t(int, pf->alloc_rss_size, qcount);
        }
        if (!vsi->rss_size)
                return -EINVAL;

        lut = kzalloc(vsi->rss_table_size, GFP_KERNEL);
        if (!lut)
                return -ENOMEM;

        /* Use user configured lut if there is one, otherwise use default */
        if (vsi->rss_lut_user)
                memcpy(lut, vsi->rss_lut_user, vsi->rss_table_size);
        else
                i40e_fill_rss_lut(pf, lut, vsi->rss_table_size, vsi->rss_size);

        /* Use user configured hash key if there is one, otherwise
         * use default.
         */
        if (vsi->rss_hkey_user)
                memcpy(seed, vsi->rss_hkey_user, I40E_HKEY_ARRAY_SIZE);
        else
                netdev_rss_key_fill((void *)seed, I40E_HKEY_ARRAY_SIZE);
        ret = i40e_config_rss(vsi, seed, lut, vsi->rss_table_size);
        kfree(lut);

        return ret;
}

/**
 * i40e_reconfig_rss_queues - change number of queues for rss and rebuild
 * @pf: board private structure
 * @queue_count: the requested queue count for rss.
 *
 * returns 0 if rss is not enabled, if enabled returns the final rss queue
 * count which may be different from the requested queue count.
 * Note: expects to be called while under rtnl_lock()
 **/
int i40e_reconfig_rss_queues(struct i40e_pf *pf, int queue_count)
{
        struct i40e_vsi *vsi = i40e_pf_get_main_vsi(pf);
        int new_rss_size;

        if (!test_bit(I40E_FLAG_RSS_ENA, pf->flags))
                return 0;

        queue_count = min_t(int, queue_count, num_online_cpus());
        new_rss_size = min_t(int, queue_count, pf->rss_size_max);

        if (queue_count != vsi->num_queue_pairs) {
                u16 qcount;

                vsi->req_queue_pairs = queue_count;
                i40e_prep_for_reset(pf);
                if (test_bit(__I40E_IN_REMOVE, pf->state))
                        return pf->alloc_rss_size;

                pf->alloc_rss_size = new_rss_size;

                i40e_reset_and_rebuild(pf, true, true);

                /* Discard the user configured hash keys and lut, if less
                 * queues are enabled.
                 */
                if (queue_count < vsi->rss_size) {
                        i40e_clear_rss_config_user(vsi);
                        dev_dbg(&pf->pdev->dev,
                                "discard user configured hash keys and lut\n");
                }

                /* Reset vsi->rss_size, as number of enabled queues changed */
                qcount = vsi->num_queue_pairs / vsi->tc_config.numtc;
                vsi->rss_size = min_t(int, pf->alloc_rss_size, qcount);

                i40e_pf_config_rss(pf);
        }
        dev_info(&pf->pdev->dev, "User requested queue count/HW max RSS count:  %d/%d\n",
                 vsi->req_queue_pairs, pf->rss_size_max);
        return pf->alloc_rss_size;
}

/**
 * i40e_get_partition_bw_setting - Retrieve BW settings for this PF partition
 * @pf: board private structure
 **/
int i40e_get_partition_bw_setting(struct i40e_pf *pf)
{
        bool min_valid, max_valid;
        u32 max_bw, min_bw;
        int status;

        status = i40e_read_bw_from_alt_ram(&pf->hw, &max_bw, &min_bw,
                                           &min_valid, &max_valid);

        if (!status) {
                if (min_valid)
                        pf->min_bw = min_bw;
                if (max_valid)
                        pf->max_bw = max_bw;
        }

        return status;
}

/**
 * i40e_set_partition_bw_setting - Set BW settings for this PF partition
 * @pf: board private structure
 **/
int i40e_set_partition_bw_setting(struct i40e_pf *pf)
{
        struct i40e_aqc_configure_partition_bw_data bw_data;
        int status;

        memset(&bw_data, 0, sizeof(bw_data));

        /* Set the valid bit for this PF */
        bw_data.pf_valid_bits = cpu_to_le16(BIT(pf->hw.pf_id));
        bw_data.max_bw[pf->hw.pf_id] = pf->max_bw & I40E_ALT_BW_VALUE_MASK;
        bw_data.min_bw[pf->hw.pf_id] = pf->min_bw & I40E_ALT_BW_VALUE_MASK;

        /* Set the new bandwidths */
        status = i40e_aq_configure_partition_bw(&pf->hw, &bw_data, NULL);

        return status;
}

/**
 * i40e_commit_partition_bw_setting - Commit BW settings for this PF partition
 * @pf: board private structure
 **/
int i40e_commit_partition_bw_setting(struct i40e_pf *pf)
{
        /* Commit temporary BW setting to permanent NVM image */
        enum i40e_admin_queue_err last_aq_status;
        u16 nvm_word;
        int ret;

        if (pf->hw.partition_id != 1) {
                dev_info(&pf->pdev->dev,
                         "Commit BW only works on partition 1! This is partition %d",
                         pf->hw.partition_id);
                ret = -EOPNOTSUPP;
                goto bw_commit_out;
        }

        /* Acquire NVM for read access */
        ret = i40e_acquire_nvm(&pf->hw, I40E_RESOURCE_READ);
        last_aq_status = pf->hw.aq.asq_last_status;
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "Cannot acquire NVM for read access, err %pe aq_err %s\n",
                         ERR_PTR(ret),
                         i40e_aq_str(&pf->hw, last_aq_status));
                goto bw_commit_out;
        }

        /* Read word 0x10 of NVM - SW compatibility word 1 */
        ret = i40e_aq_read_nvm(&pf->hw,
                               I40E_SR_NVM_CONTROL_WORD,
                               0x10, sizeof(nvm_word), &nvm_word,
                               false, NULL);
        /* Save off last admin queue command status before releasing
         * the NVM
         */
        last_aq_status = pf->hw.aq.asq_last_status;
        i40e_release_nvm(&pf->hw);
        if (ret) {
                dev_info(&pf->pdev->dev, "NVM read error, err %pe aq_err %s\n",
                         ERR_PTR(ret),
                         i40e_aq_str(&pf->hw, last_aq_status));
                goto bw_commit_out;
        }

        /* Wait a bit for NVM release to complete */
        msleep(50);

        /* Acquire NVM for write access */
        ret = i40e_acquire_nvm(&pf->hw, I40E_RESOURCE_WRITE);
        last_aq_status = pf->hw.aq.asq_last_status;
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "Cannot acquire NVM for write access, err %pe aq_err %s\n",
                         ERR_PTR(ret),
                         i40e_aq_str(&pf->hw, last_aq_status));
                goto bw_commit_out;
        }
        /* Write it back out unchanged to initiate update NVM,
         * which will force a write of the shadow (alt) RAM to
         * the NVM - thus storing the bandwidth values permanently.
         */
        ret = i40e_aq_update_nvm(&pf->hw,
                                 I40E_SR_NVM_CONTROL_WORD,
                                 0x10, sizeof(nvm_word),
                                 &nvm_word, true, 0, NULL);
        /* Save off last admin queue command status before releasing
         * the NVM
         */
        last_aq_status = pf->hw.aq.asq_last_status;
        i40e_release_nvm(&pf->hw);
        if (ret)
                dev_info(&pf->pdev->dev,
                         "BW settings NOT SAVED, err %pe aq_err %s\n",
                         ERR_PTR(ret),
                         i40e_aq_str(&pf->hw, last_aq_status));
bw_commit_out:

        return ret;
}

/**
 * i40e_is_total_port_shutdown_enabled - read NVM and return value
 * if total port shutdown feature is enabled for this PF
 * @pf: board private structure
 **/
static bool i40e_is_total_port_shutdown_enabled(struct i40e_pf *pf)
{
#define I40E_TOTAL_PORT_SHUTDOWN_ENABLED        BIT(4)
#define I40E_FEATURES_ENABLE_PTR                0x2A
#define I40E_CURRENT_SETTING_PTR                0x2B
#define I40E_LINK_BEHAVIOR_WORD_OFFSET          0x2D
#define I40E_LINK_BEHAVIOR_WORD_LENGTH          0x1
#define I40E_LINK_BEHAVIOR_OS_FORCED_ENABLED    BIT(0)
#define I40E_LINK_BEHAVIOR_PORT_BIT_LENGTH      4
        u16 sr_emp_sr_settings_ptr = 0;
        u16 features_enable = 0;
        u16 link_behavior = 0;
        int read_status = 0;
        bool ret = false;

        read_status = i40e_read_nvm_word(&pf->hw,
                                         I40E_SR_EMP_SR_SETTINGS_PTR,
                                         &sr_emp_sr_settings_ptr);
        if (read_status)
                goto err_nvm;
        read_status = i40e_read_nvm_word(&pf->hw,
                                         sr_emp_sr_settings_ptr +
                                         I40E_FEATURES_ENABLE_PTR,
                                         &features_enable);
        if (read_status)
                goto err_nvm;
        if (I40E_TOTAL_PORT_SHUTDOWN_ENABLED & features_enable) {
                read_status = i40e_read_nvm_module_data(&pf->hw,
                                                        I40E_SR_EMP_SR_SETTINGS_PTR,
                                                        I40E_CURRENT_SETTING_PTR,
                                                        I40E_LINK_BEHAVIOR_WORD_OFFSET,
                                                        I40E_LINK_BEHAVIOR_WORD_LENGTH,
                                                        &link_behavior);
                if (read_status)
                        goto err_nvm;
                link_behavior >>= (pf->hw.port * I40E_LINK_BEHAVIOR_PORT_BIT_LENGTH);
                ret = I40E_LINK_BEHAVIOR_OS_FORCED_ENABLED & link_behavior;
        }
        return ret;

err_nvm:
        dev_warn(&pf->pdev->dev,
                 "total-port-shutdown feature is off due to read nvm error: %pe\n",
                 ERR_PTR(read_status));
        return ret;
}

/**
 * i40e_sw_init - Initialize general software structures (struct i40e_pf)
 * @pf: board private structure to initialize
 *
 * i40e_sw_init initializes the Adapter private data structure.
 * Fields are initialized based on PCI device information and
 * OS network device settings (MTU size).
 **/
static int i40e_sw_init(struct i40e_pf *pf)
{
        int err = 0;
        int size;
        u16 pow;

        /* Set default capability flags */
        bitmap_zero(pf->flags, I40E_PF_FLAGS_NBITS);
        set_bit(I40E_FLAG_MSI_ENA, pf->flags);
        set_bit(I40E_FLAG_MSIX_ENA, pf->flags);

        /* Set default ITR */
        pf->rx_itr_default = I40E_ITR_RX_DEF;
        pf->tx_itr_default = I40E_ITR_TX_DEF;

        /* Depending on PF configurations, it is possible that the RSS
         * maximum might end up larger than the available queues
         */
        pf->rss_size_max = BIT(pf->hw.func_caps.rss_table_entry_width);
        pf->alloc_rss_size = 1;
        pf->rss_table_size = pf->hw.func_caps.rss_table_size;
        pf->rss_size_max = min_t(int, pf->rss_size_max,
                                 pf->hw.func_caps.num_tx_qp);

        /* find the next higher power-of-2 of num cpus */
        pow = roundup_pow_of_two(num_online_cpus());
        pf->rss_size_max = min_t(int, pf->rss_size_max, pow);

        if (pf->hw.func_caps.rss) {
                set_bit(I40E_FLAG_RSS_ENA, pf->flags);
                pf->alloc_rss_size = min_t(int, pf->rss_size_max,
                                           num_online_cpus());
        }

        /* MFP mode enabled */
        if (pf->hw.func_caps.npar_enable || pf->hw.func_caps.flex10_enable) {
                set_bit(I40E_FLAG_MFP_ENA, pf->flags);
                dev_info(&pf->pdev->dev, "MFP mode Enabled\n");
                if (i40e_get_partition_bw_setting(pf)) {
                        dev_warn(&pf->pdev->dev,
                                 "Could not get partition bw settings\n");
                } else {
                        dev_info(&pf->pdev->dev,
                                 "Partition BW Min = %8.8x, Max = %8.8x\n",
                                 pf->min_bw, pf->max_bw);

                        /* nudge the Tx scheduler */
                        i40e_set_partition_bw_setting(pf);
                }
        }

        if ((pf->hw.func_caps.fd_filters_guaranteed > 0) ||
            (pf->hw.func_caps.fd_filters_best_effort > 0)) {
                set_bit(I40E_FLAG_FD_ATR_ENA, pf->flags);
                if (test_bit(I40E_FLAG_MFP_ENA, pf->flags) &&
                    pf->hw.num_partitions > 1)
                        dev_info(&pf->pdev->dev,
                                 "Flow Director Sideband mode Disabled in MFP mode\n");
                else
                        set_bit(I40E_FLAG_FD_SB_ENA, pf->flags);
                pf->fdir_pf_filter_count =
                                 pf->hw.func_caps.fd_filters_guaranteed;
                pf->hw.fdir_shared_filter_count =
                                 pf->hw.func_caps.fd_filters_best_effort;
        }

        /* Enable HW ATR eviction if possible */
        if (test_bit(I40E_HW_CAP_ATR_EVICT, pf->hw.caps))
                set_bit(I40E_FLAG_HW_ATR_EVICT_ENA, pf->flags);

        if (pf->hw.func_caps.vmdq && num_online_cpus() != 1) {
                pf->num_vmdq_vsis = I40E_DEFAULT_NUM_VMDQ_VSI;
                set_bit(I40E_FLAG_VMDQ_ENA, pf->flags);
                pf->num_vmdq_qps = i40e_default_queues_per_vmdq(pf);
        }

        if (pf->hw.func_caps.iwarp && num_online_cpus() != 1) {
                set_bit(I40E_FLAG_IWARP_ENA, pf->flags);
                /* IWARP needs one extra vector for CQP just like MISC.*/
                pf->num_iwarp_msix = (int)num_online_cpus() + 1;
        }
        /* Stopping FW LLDP engine is supported on XL710 and X722
         * starting from FW versions determined in i40e_init_adminq.
         * Stopping the FW LLDP engine is not supported on XL710
         * if NPAR is functioning so unset this hw flag in this case.
         */
        if (pf->hw.mac.type == I40E_MAC_XL710 &&
            pf->hw.func_caps.npar_enable)
                clear_bit(I40E_HW_CAP_FW_LLDP_STOPPABLE, pf->hw.caps);

#ifdef CONFIG_PCI_IOV
        if (pf->hw.func_caps.num_vfs && pf->hw.partition_id == 1) {
                pf->num_vf_qps = I40E_DEFAULT_QUEUES_PER_VF;
                set_bit(I40E_FLAG_SRIOV_ENA, pf->flags);
                pf->num_req_vfs = min_t(int,
                                        pf->hw.func_caps.num_vfs,
                                        I40E_MAX_VF_COUNT);
        }
#endif /* CONFIG_PCI_IOV */
        pf->lan_veb = I40E_NO_VEB;
        pf->lan_vsi = I40E_NO_VSI;

        /* By default FW has this off for performance reasons */
        clear_bit(I40E_FLAG_VEB_STATS_ENA, pf->flags);

        /* set up queue assignment tracking */
        size = sizeof(struct i40e_lump_tracking)
                + (sizeof(u16) * pf->hw.func_caps.num_tx_qp);
        pf->qp_pile = kzalloc(size, GFP_KERNEL);
        if (!pf->qp_pile) {
                err = -ENOMEM;
                goto sw_init_done;
        }
        pf->qp_pile->num_entries = pf->hw.func_caps.num_tx_qp;

        pf->tx_timeout_recovery_level = 1;

        if (pf->hw.mac.type != I40E_MAC_X722 &&
            i40e_is_total_port_shutdown_enabled(pf)) {
                /* Link down on close must be on when total port shutdown
                 * is enabled for a given port
                 */
                set_bit(I40E_FLAG_TOTAL_PORT_SHUTDOWN_ENA, pf->flags);
                set_bit(I40E_FLAG_LINK_DOWN_ON_CLOSE_ENA, pf->flags);
                dev_info(&pf->pdev->dev,
                         "total-port-shutdown was enabled, link-down-on-close is forced on\n");
        }
        mutex_init(&pf->switch_mutex);

sw_init_done:
        return err;
}

/**
 * i40e_set_ntuple - set the ntuple feature flag and take action
 * @pf: board private structure to initialize
 * @features: the feature set that the stack is suggesting
 *
 * returns a bool to indicate if reset needs to happen
 **/
bool i40e_set_ntuple(struct i40e_pf *pf, netdev_features_t features)
{
        bool need_reset = false;

        /* Check if Flow Director n-tuple support was enabled or disabled.  If
         * the state changed, we need to reset.
         */
        if (features & NETIF_F_NTUPLE) {
                /* Enable filters and mark for reset */
                if (!test_bit(I40E_FLAG_FD_SB_ENA, pf->flags))
                        need_reset = true;
                /* enable FD_SB only if there is MSI-X vector and no cloud
                 * filters exist
                 */
                if (pf->num_fdsb_msix > 0 && !pf->num_cloud_filters) {
                        set_bit(I40E_FLAG_FD_SB_ENA, pf->flags);
                        clear_bit(I40E_FLAG_FD_SB_INACTIVE, pf->flags);
                }
        } else {
                /* turn off filters, mark for reset and clear SW filter list */
                if (test_bit(I40E_FLAG_FD_SB_ENA, pf->flags)) {
                        need_reset = true;
                        i40e_fdir_filter_exit(pf);
                }
                clear_bit(I40E_FLAG_FD_SB_ENA, pf->flags);
                clear_bit(__I40E_FD_SB_AUTO_DISABLED, pf->state);
                set_bit(I40E_FLAG_FD_SB_INACTIVE, pf->flags);

                /* reset fd counters */
                pf->fd_add_err = 0;
                pf->fd_atr_cnt = 0;
                /* if ATR was auto disabled it can be re-enabled. */
                if (test_and_clear_bit(__I40E_FD_ATR_AUTO_DISABLED, pf->state))
                        if (test_bit(I40E_FLAG_FD_ATR_ENA, pf->flags) &&
                            (I40E_DEBUG_FD & pf->hw.debug_mask))
                                dev_info(&pf->pdev->dev, "ATR re-enabled.\n");
        }
        return need_reset;
}

/**
 * i40e_clear_rss_lut - clear the rx hash lookup table
 * @vsi: the VSI being configured
 **/
static void i40e_clear_rss_lut(struct i40e_vsi *vsi)
{
        struct i40e_pf *pf = vsi->back;
        struct i40e_hw *hw = &pf->hw;
        u16 vf_id = vsi->vf_id;
        u8 i;

        if (vsi->type == I40E_VSI_MAIN) {
                for (i = 0; i <= I40E_PFQF_HLUT_MAX_INDEX; i++)
                        wr32(hw, I40E_PFQF_HLUT(i), 0);
        } else if (vsi->type == I40E_VSI_SRIOV) {
                for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++)
                        i40e_write_rx_ctl(hw, I40E_VFQF_HLUT1(i, vf_id), 0);
        } else {
                dev_err(&pf->pdev->dev, "Cannot set RSS LUT - invalid VSI type\n");
        }
}

/**
 * i40e_set_loopback - turn on/off loopback mode on underlying PF
 * @vsi: ptr to VSI
 * @ena: flag to indicate the on/off setting
 */
static int i40e_set_loopback(struct i40e_vsi *vsi, bool ena)
{
        bool if_running = netif_running(vsi->netdev) &&
                          !test_and_set_bit(__I40E_VSI_DOWN, vsi->state);
        int ret;

        if (if_running)
                i40e_down(vsi);

        ret = i40e_aq_set_mac_loopback(&vsi->back->hw, ena, NULL);
        if (ret)
                netdev_err(vsi->netdev, "Failed to toggle loopback state\n");
        if (if_running)
                i40e_up(vsi);

        return ret;
}

/**
 * i40e_set_features - set the netdev feature flags
 * @netdev: ptr to the netdev being adjusted
 * @features: the feature set that the stack is suggesting
 * Note: expects to be called while under rtnl_lock()
 **/
static int i40e_set_features(struct net_device *netdev,
                             netdev_features_t features)
{
        struct i40e_netdev_priv *np = netdev_priv(netdev);
        struct i40e_vsi *vsi = np->vsi;
        struct i40e_pf *pf = vsi->back;
        bool need_reset;

        if (features & NETIF_F_RXHASH && !(netdev->features & NETIF_F_RXHASH))
                i40e_pf_config_rss(pf);
        else if (!(features & NETIF_F_RXHASH) &&
                 netdev->features & NETIF_F_RXHASH)
                i40e_clear_rss_lut(vsi);

        if (features & NETIF_F_HW_VLAN_CTAG_RX)
                i40e_vlan_stripping_enable(vsi);
        else
                i40e_vlan_stripping_disable(vsi);

        if (!(features & NETIF_F_HW_TC) &&
            (netdev->features & NETIF_F_HW_TC) && pf->num_cloud_filters) {
                dev_err(&pf->pdev->dev,
                        "Offloaded tc filters active, can't turn hw_tc_offload off");
                return -EINVAL;
        }

        if (!(features & NETIF_F_HW_L2FW_DOFFLOAD) && vsi->macvlan_cnt)
                i40e_del_all_macvlans(vsi);

        need_reset = i40e_set_ntuple(pf, features);

        if (need_reset)
                i40e_do_reset(pf, I40E_PF_RESET_FLAG, true);

        if ((features ^ netdev->features) & NETIF_F_LOOPBACK)
                return i40e_set_loopback(vsi, !!(features & NETIF_F_LOOPBACK));

        return 0;
}

static int i40e_udp_tunnel_set_port(struct net_device *netdev,
                                    unsigned int table, unsigned int idx,
                                    struct udp_tunnel_info *ti)
{
        struct i40e_netdev_priv *np = netdev_priv(netdev);
        struct i40e_hw *hw = &np->vsi->back->hw;
        u8 type, filter_index;
        int ret;

        type = ti->type == UDP_TUNNEL_TYPE_VXLAN ? I40E_AQC_TUNNEL_TYPE_VXLAN :
                                                   I40E_AQC_TUNNEL_TYPE_NGE;

        ret = i40e_aq_add_udp_tunnel(hw, ntohs(ti->port), type, &filter_index,
                                     NULL);
        if (ret) {
                netdev_info(netdev, "add UDP port failed, err %pe aq_err %s\n",
                            ERR_PTR(ret),
                            i40e_aq_str(hw, hw->aq.asq_last_status));
                return -EIO;
        }

        udp_tunnel_nic_set_port_priv(netdev, table, idx, filter_index);
        return 0;
}

static int i40e_udp_tunnel_unset_port(struct net_device *netdev,
                                      unsigned int table, unsigned int idx,
                                      struct udp_tunnel_info *ti)
{
        struct i40e_netdev_priv *np = netdev_priv(netdev);
        struct i40e_hw *hw = &np->vsi->back->hw;
        int ret;

        ret = i40e_aq_del_udp_tunnel(hw, ti->hw_priv, NULL);
        if (ret) {
                netdev_info(netdev, "delete UDP port failed, err %pe aq_err %s\n",
                            ERR_PTR(ret),
                            i40e_aq_str(hw, hw->aq.asq_last_status));
                return -EIO;
        }

        return 0;
}

static int i40e_get_phys_port_id(struct net_device *netdev,
                                 struct netdev_phys_item_id *ppid)
{
        struct i40e_netdev_priv *np = netdev_priv(netdev);
        struct i40e_pf *pf = np->vsi->back;
        struct i40e_hw *hw = &pf->hw;

        if (!test_bit(I40E_HW_CAP_PORT_ID_VALID, pf->hw.caps))
                return -EOPNOTSUPP;

        ppid->id_len = min_t(int, sizeof(hw->mac.port_addr), sizeof(ppid->id));
        memcpy(ppid->id, hw->mac.port_addr, ppid->id_len);

        return 0;
}

/**
 * i40e_ndo_fdb_add - add an entry to the hardware database
 * @ndm: the input from the stack
 * @tb: pointer to array of nladdr (unused)
 * @dev: the net device pointer
 * @addr: the MAC address entry being added
 * @vid: VLAN ID
 * @flags: instructions from stack about fdb operation
 * @notified: whether notification was emitted
 * @extack: netlink extended ack, unused currently
 */
static int i40e_ndo_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
                            struct net_device *dev,
                            const unsigned char *addr, u16 vid,
                            u16 flags, bool *notified,
                            struct netlink_ext_ack *extack)
{
        struct i40e_netdev_priv *np = netdev_priv(dev);
        struct i40e_pf *pf = np->vsi->back;
        int err = 0;

        if (!test_bit(I40E_FLAG_SRIOV_ENA, pf->flags))
                return -EOPNOTSUPP;

        if (vid) {
                pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
                return -EINVAL;
        }

        /* Hardware does not support aging addresses so if a
         * ndm_state is given only allow permanent addresses
         */
        if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
                netdev_info(dev, "FDB only supports static addresses\n");
                return -EINVAL;
        }

        if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
                err = dev_uc_add_excl(dev, addr);
        else if (is_multicast_ether_addr(addr))
                err = dev_mc_add_excl(dev, addr);
        else
                err = -EINVAL;

        /* Only return duplicate errors if NLM_F_EXCL is set */
        if (err == -EEXIST && !(flags & NLM_F_EXCL))
                err = 0;

        return err;
}

/**
 * i40e_ndo_bridge_setlink - Set the hardware bridge mode
 * @dev: the netdev being configured
 * @nlh: RTNL message
 * @flags: bridge flags
 * @extack: netlink extended ack
 *
 * Inserts a new hardware bridge if not already created and
 * enables the bridging mode requested (VEB or VEPA). If the
 * hardware bridge has already been inserted and the request
 * is to change the mode then that requires a PF reset to
 * allow rebuild of the components with required hardware
 * bridge mode enabled.
 *
 * Note: expects to be called while under rtnl_lock()
 **/
static int i40e_ndo_bridge_setlink(struct net_device *dev,
                                   struct nlmsghdr *nlh,
                                   u16 flags,
                                   struct netlink_ext_ack *extack)
{
        struct i40e_netdev_priv *np = netdev_priv(dev);
        struct i40e_vsi *vsi = np->vsi;
        struct i40e_pf *pf = vsi->back;
        struct nlattr *attr, *br_spec;
        struct i40e_veb *veb;
        int rem;

        /* Only for PF VSI for now */
        if (vsi->type != I40E_VSI_MAIN)
                return -EOPNOTSUPP;

        /* Find the HW bridge for PF VSI */
        veb = i40e_pf_get_veb_by_seid(pf, vsi->uplink_seid);

        br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
        if (!br_spec)
                return -EINVAL;

        nla_for_each_nested_type(attr, IFLA_BRIDGE_MODE, br_spec, rem) {
                __u16 mode = nla_get_u16(attr);

                if ((mode != BRIDGE_MODE_VEPA) &&
                    (mode != BRIDGE_MODE_VEB))
                        return -EINVAL;

                /* Insert a new HW bridge */
                if (!veb) {
                        veb = i40e_veb_setup(pf, vsi->uplink_seid, vsi->seid,
                                             vsi->tc_config.enabled_tc);
                        if (veb) {
                                veb->bridge_mode = mode;
                                i40e_config_bridge_mode(veb);
                        } else {
                                /* No Bridge HW offload available */
                                return -ENOENT;
                        }
                        break;
                } else if (mode != veb->bridge_mode) {
                        /* Existing HW bridge but different mode needs reset */
                        veb->bridge_mode = mode;
                        /* TODO: If no VFs or VMDq VSIs, disallow VEB mode */
                        if (mode == BRIDGE_MODE_VEB)
                                set_bit(I40E_FLAG_VEB_MODE_ENA, pf->flags);
                        else
                                clear_bit(I40E_FLAG_VEB_MODE_ENA, pf->flags);
                        i40e_do_reset(pf, I40E_PF_RESET_FLAG, true);
                        break;
                }
        }

        return 0;
}

/**
 * i40e_ndo_bridge_getlink - Get the hardware bridge mode
 * @skb: skb buff
 * @pid: process id
 * @seq: RTNL message seq #
 * @dev: the netdev being configured
 * @filter_mask: unused
 * @nlflags: netlink flags passed in
 *
 * Return the mode in which the hardware bridge is operating in
 * i.e VEB or VEPA.
 **/
static int i40e_ndo_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
                                   struct net_device *dev,
                                   u32 __always_unused filter_mask,
                                   int nlflags)
{
        struct i40e_netdev_priv *np = netdev_priv(dev);
        struct i40e_vsi *vsi = np->vsi;
        struct i40e_pf *pf = vsi->back;
        struct i40e_veb *veb;

        /* Only for PF VSI for now */
        if (vsi->type != I40E_VSI_MAIN)
                return -EOPNOTSUPP;

        /* Find the HW bridge for the PF VSI */
        veb = i40e_pf_get_veb_by_seid(pf, vsi->uplink_seid);
        if (!veb)
                return 0;

        return ndo_dflt_bridge_getlink(skb, pid, seq, dev, veb->bridge_mode,
                                       0, 0, nlflags, filter_mask, NULL);
}

/**
 * i40e_features_check - Validate encapsulated packet conforms to limits
 * @skb: skb buff
 * @dev: This physical port's netdev
 * @features: Offload features that the stack believes apply
 **/
static netdev_features_t i40e_features_check(struct sk_buff *skb,
                                             struct net_device *dev,
                                             netdev_features_t features)
{
        size_t len;

        /* No point in doing any of this if neither checksum nor GSO are
         * being requested for this frame.  We can rule out both by just
         * checking for CHECKSUM_PARTIAL
         */
        if (skb->ip_summed != CHECKSUM_PARTIAL)
                return features;

        /* We cannot support GSO if the MSS is going to be less than
         * 64 bytes.  If it is then we need to drop support for GSO.
         */
        if (skb_is_gso(skb) && (skb_shinfo(skb)->gso_size < 64))
                features &= ~NETIF_F_GSO_MASK;

        /* MACLEN can support at most 63 words */
        len = skb_network_offset(skb);
        if (len & ~(63 * 2))
                goto out_err;

        /* IPLEN and EIPLEN can support at most 127 dwords */
        len = skb_network_header_len(skb);
        if (len & ~(127 * 4))
                goto out_err;

        if (skb->encapsulation) {
                /* L4TUNLEN can support 127 words */
                len = skb_inner_network_header(skb) - skb_transport_header(skb);
                if (len & ~(127 * 2))
                        goto out_err;

                /* IPLEN can support at most 127 dwords */
                len = skb_inner_transport_header(skb) -
                      skb_inner_network_header(skb);
                if (len & ~(127 * 4))
                        goto out_err;
        }

        /* No need to validate L4LEN as TCP is the only protocol with a
         * flexible value and we support all possible values supported
         * by TCP, which is at most 15 dwords
         */

        return features;
out_err:
        return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK);
}

/**
 * i40e_xdp_setup - add/remove an XDP program
 * @vsi: VSI to changed
 * @prog: XDP program
 * @extack: netlink extended ack
 **/
static int i40e_xdp_setup(struct i40e_vsi *vsi, struct bpf_prog *prog,
                          struct netlink_ext_ack *extack)
{
        int frame_size = i40e_max_vsi_frame_size(vsi, prog);
        struct i40e_pf *pf = vsi->back;
        struct bpf_prog *old_prog;
        bool need_reset;
        int i;

        /* VSI shall be deleted in a moment, block loading new programs */
        if (prog && test_bit(__I40E_IN_REMOVE, pf->state))
                return -EINVAL;

        /* Don't allow frames that span over multiple buffers */
        if (vsi->netdev->mtu > frame_size - I40E_PACKET_HDR_PAD) {
                NL_SET_ERR_MSG_MOD(extack, "MTU too large for linear frames and XDP prog does not support frags");
                return -EINVAL;
        }

        /* When turning XDP on->off/off->on we reset and rebuild the rings. */
        need_reset = (i40e_enabled_xdp_vsi(vsi) != !!prog);
        if (need_reset)
                i40e_prep_for_reset(pf);

        old_prog = xchg(&vsi->xdp_prog, prog);

        if (need_reset) {
                if (!prog) {
                        xdp_features_clear_redirect_target(vsi->netdev);
                        /* Wait until ndo_xsk_wakeup completes. */
                        synchronize_rcu();
                }
                i40e_reset_and_rebuild(pf, true, true);
        }

        if (!i40e_enabled_xdp_vsi(vsi) && prog) {
                if (i40e_realloc_rx_bi_zc(vsi, true))
                        return -ENOMEM;
        } else if (i40e_enabled_xdp_vsi(vsi) && !prog) {
                if (i40e_realloc_rx_bi_zc(vsi, false))
                        return -ENOMEM;
        }

        for (i = 0; i < vsi->num_queue_pairs; i++)
                WRITE_ONCE(vsi->rx_rings[i]->xdp_prog, vsi->xdp_prog);

        if (old_prog)
                bpf_prog_put(old_prog);

        /* Kick start the NAPI context if there is an AF_XDP socket open
         * on that queue id. This so that receiving will start.
         */
        if (need_reset && prog) {
                for (i = 0; i < vsi->num_queue_pairs; i++)
                        if (vsi->xdp_rings[i]->xsk_pool)
                                (void)i40e_xsk_wakeup(vsi->netdev, i,
                                                      XDP_WAKEUP_RX);
                xdp_features_set_redirect_target(vsi->netdev, true);
        }

        return 0;
}

/**
 * i40e_enter_busy_conf - Enters busy config state
 * @vsi: vsi
 *
 * Returns 0 on success, <0 for failure.
 **/
static int i40e_enter_busy_conf(struct i40e_vsi *vsi)
{
        struct i40e_pf *pf = vsi->back;
        int timeout = 50;

        while (test_and_set_bit(__I40E_CONFIG_BUSY, pf->state)) {
                timeout--;
                if (!timeout)
                        return -EBUSY;
                usleep_range(1000, 2000);
        }

        return 0;
}

/**
 * i40e_exit_busy_conf - Exits busy config state
 * @vsi: vsi
 **/
static void i40e_exit_busy_conf(struct i40e_vsi *vsi)
{
        struct i40e_pf *pf = vsi->back;

        clear_bit(__I40E_CONFIG_BUSY, pf->state);
}

/**
 * i40e_queue_pair_reset_stats - Resets all statistics for a queue pair
 * @vsi: vsi
 * @queue_pair: queue pair
 **/
static void i40e_queue_pair_reset_stats(struct i40e_vsi *vsi, int queue_pair)
{
        memset(&vsi->rx_rings[queue_pair]->rx_stats, 0,
               sizeof(vsi->rx_rings[queue_pair]->rx_stats));
        memset(&vsi->tx_rings[queue_pair]->stats, 0,
               sizeof(vsi->tx_rings[queue_pair]->stats));
        if (i40e_enabled_xdp_vsi(vsi)) {
                memset(&vsi->xdp_rings[queue_pair]->stats, 0,
                       sizeof(vsi->xdp_rings[queue_pair]->stats));
        }
}

/**
 * i40e_queue_pair_clean_rings - Cleans all the rings of a queue pair
 * @vsi: vsi
 * @queue_pair: queue pair
 **/
static void i40e_queue_pair_clean_rings(struct i40e_vsi *vsi, int queue_pair)
{
        i40e_clean_tx_ring(vsi->tx_rings[queue_pair]);
        if (i40e_enabled_xdp_vsi(vsi)) {
                /* Make sure that in-progress ndo_xdp_xmit calls are
                 * completed.
                 */
                synchronize_rcu();
                i40e_clean_tx_ring(vsi->xdp_rings[queue_pair]);
        }
        i40e_clean_rx_ring(vsi->rx_rings[queue_pair]);
}

/**
 * i40e_queue_pair_toggle_napi - Enables/disables NAPI for a queue pair
 * @vsi: vsi
 * @queue_pair: queue pair
 * @enable: true for enable, false for disable
 **/
static void i40e_queue_pair_toggle_napi(struct i40e_vsi *vsi, int queue_pair,
                                        bool enable)
{
        struct i40e_ring *rxr = vsi->rx_rings[queue_pair];
        struct i40e_q_vector *q_vector = rxr->q_vector;

        if (!vsi->netdev)
                return;

        /* All rings in a qp belong to the same qvector. */
        if (q_vector->rx.ring || q_vector->tx.ring) {
                if (enable)
                        napi_enable(&q_vector->napi);
                else
                        napi_disable(&q_vector->napi);
        }
}

/**
 * i40e_queue_pair_toggle_rings - Enables/disables all rings for a queue pair
 * @vsi: vsi
 * @queue_pair: queue pair
 * @enable: true for enable, false for disable
 *
 * Returns 0 on success, <0 on failure.
 **/
static int i40e_queue_pair_toggle_rings(struct i40e_vsi *vsi, int queue_pair,
                                        bool enable)
{
        struct i40e_pf *pf = vsi->back;
        int pf_q, ret = 0;

        pf_q = vsi->base_queue + queue_pair;
        ret = i40e_control_wait_tx_q(vsi->seid, pf, pf_q,
                                     false /*is xdp*/, enable);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "VSI seid %d Tx ring %d %sable timeout\n",
                         vsi->seid, pf_q, (enable ? "en" : "dis"));
                return ret;
        }

        i40e_control_rx_q(pf, pf_q, enable);
        ret = i40e_pf_rxq_wait(pf, pf_q, enable);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "VSI seid %d Rx ring %d %sable timeout\n",
                         vsi->seid, pf_q, (enable ? "en" : "dis"));
                return ret;
        }

        /* Due to HW errata, on Rx disable only, the register can
         * indicate done before it really is. Needs 50ms to be sure
         */
        if (!enable)
                mdelay(50);

        if (!i40e_enabled_xdp_vsi(vsi))
                return ret;

        ret = i40e_control_wait_tx_q(vsi->seid, pf,
                                     pf_q + vsi->alloc_queue_pairs,
                                     true /*is xdp*/, enable);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "VSI seid %d XDP Tx ring %d %sable timeout\n",
                         vsi->seid, pf_q, (enable ? "en" : "dis"));
        }

        return ret;
}

/**
 * i40e_queue_pair_enable_irq - Enables interrupts for a queue pair
 * @vsi: vsi
 * @queue_pair: queue_pair
 **/
static void i40e_queue_pair_enable_irq(struct i40e_vsi *vsi, int queue_pair)
{
        struct i40e_ring *rxr = vsi->rx_rings[queue_pair];
        struct i40e_pf *pf = vsi->back;
        struct i40e_hw *hw = &pf->hw;

        /* All rings in a qp belong to the same qvector. */
        if (test_bit(I40E_FLAG_MSIX_ENA, pf->flags))
                i40e_irq_dynamic_enable(vsi, rxr->q_vector->v_idx);
        else
                i40e_irq_dynamic_enable_icr0(pf);

        i40e_flush(hw);
}

/**
 * i40e_queue_pair_disable_irq - Disables interrupts for a queue pair
 * @vsi: vsi
 * @queue_pair: queue_pair
 **/
static void i40e_queue_pair_disable_irq(struct i40e_vsi *vsi, int queue_pair)
{
        struct i40e_ring *rxr = vsi->rx_rings[queue_pair];
        struct i40e_pf *pf = vsi->back;
        struct i40e_hw *hw = &pf->hw;

        /* For simplicity, instead of removing the qp interrupt causes
         * from the interrupt linked list, we simply disable the interrupt, and
         * leave the list intact.
         *
         * All rings in a qp belong to the same qvector.
         */
        if (test_bit(I40E_FLAG_MSIX_ENA, pf->flags)) {
                u32 intpf = vsi->base_vector + rxr->q_vector->v_idx;

                wr32(hw, I40E_PFINT_DYN_CTLN(intpf - 1), 0);
                i40e_flush(hw);
                synchronize_irq(pf->msix_entries[intpf].vector);
        } else {
                /* Legacy and MSI mode - this stops all interrupt handling */
                wr32(hw, I40E_PFINT_ICR0_ENA, 0);
                wr32(hw, I40E_PFINT_DYN_CTL0, 0);
                i40e_flush(hw);
                synchronize_irq(pf->pdev->irq);
        }
}

/**
 * i40e_queue_pair_disable - Disables a queue pair
 * @vsi: vsi
 * @queue_pair: queue pair
 *
 * Returns 0 on success, <0 on failure.
 **/
int i40e_queue_pair_disable(struct i40e_vsi *vsi, int queue_pair)
{
        int err;

        err = i40e_enter_busy_conf(vsi);
        if (err)
                return err;

        i40e_queue_pair_disable_irq(vsi, queue_pair);
        i40e_queue_pair_toggle_napi(vsi, queue_pair, false /* off */);
        err = i40e_queue_pair_toggle_rings(vsi, queue_pair, false /* off */);
        i40e_clean_rx_ring(vsi->rx_rings[queue_pair]);
        i40e_queue_pair_clean_rings(vsi, queue_pair);
        i40e_queue_pair_reset_stats(vsi, queue_pair);

        return err;
}

/**
 * i40e_queue_pair_enable - Enables a queue pair
 * @vsi: vsi
 * @queue_pair: queue pair
 *
 * Returns 0 on success, <0 on failure.
 **/
int i40e_queue_pair_enable(struct i40e_vsi *vsi, int queue_pair)
{
        int err;

        err = i40e_configure_tx_ring(vsi->tx_rings[queue_pair]);
        if (err)
                return err;

        if (i40e_enabled_xdp_vsi(vsi)) {
                err = i40e_configure_tx_ring(vsi->xdp_rings[queue_pair]);
                if (err)
                        return err;
        }

        err = i40e_configure_rx_ring(vsi->rx_rings[queue_pair]);
        if (err)
                return err;

        err = i40e_queue_pair_toggle_rings(vsi, queue_pair, true /* on */);
        i40e_queue_pair_toggle_napi(vsi, queue_pair, true /* on */);
        i40e_queue_pair_enable_irq(vsi, queue_pair);

        i40e_exit_busy_conf(vsi);

        return err;
}

/**
 * i40e_xdp - implements ndo_bpf for i40e
 * @dev: netdevice
 * @xdp: XDP command
 **/
static int i40e_xdp(struct net_device *dev,
                    struct netdev_bpf *xdp)
{
        struct i40e_netdev_priv *np = netdev_priv(dev);
        struct i40e_vsi *vsi = np->vsi;

        if (vsi->type != I40E_VSI_MAIN)
                return -EINVAL;

        switch (xdp->command) {
        case XDP_SETUP_PROG:
                return i40e_xdp_setup(vsi, xdp->prog, xdp->extack);
        case XDP_SETUP_XSK_POOL:
                return i40e_xsk_pool_setup(vsi, xdp->xsk.pool,
                                           xdp->xsk.queue_id);
        default:
                return -EINVAL;
        }
}

static const struct net_device_ops i40e_netdev_ops = {
        .ndo_open               = i40e_open,
        .ndo_stop               = i40e_close,
        .ndo_start_xmit         = i40e_lan_xmit_frame,
        .ndo_get_stats64        = i40e_get_netdev_stats_struct,
        .ndo_set_rx_mode        = i40e_set_rx_mode,
        .ndo_validate_addr      = eth_validate_addr,
        .ndo_set_mac_address    = i40e_set_mac,
        .ndo_change_mtu         = i40e_change_mtu,
        .ndo_eth_ioctl          = i40e_ioctl,
        .ndo_tx_timeout         = i40e_tx_timeout,
        .ndo_vlan_rx_add_vid    = i40e_vlan_rx_add_vid,
        .ndo_vlan_rx_kill_vid   = i40e_vlan_rx_kill_vid,
#ifdef CONFIG_NET_POLL_CONTROLLER
        .ndo_poll_controller    = i40e_netpoll,
#endif
        .ndo_setup_tc           = __i40e_setup_tc,
        .ndo_select_queue       = i40e_lan_select_queue,
        .ndo_set_features       = i40e_set_features,
        .ndo_set_vf_mac         = i40e_ndo_set_vf_mac,
        .ndo_set_vf_vlan        = i40e_ndo_set_vf_port_vlan,
        .ndo_get_vf_stats       = i40e_get_vf_stats,
        .ndo_set_vf_rate        = i40e_ndo_set_vf_bw,
        .ndo_get_vf_config      = i40e_ndo_get_vf_config,
        .ndo_set_vf_link_state  = i40e_ndo_set_vf_link_state,
        .ndo_set_vf_spoofchk    = i40e_ndo_set_vf_spoofchk,
        .ndo_set_vf_trust       = i40e_ndo_set_vf_trust,
        .ndo_get_phys_port_id   = i40e_get_phys_port_id,
        .ndo_fdb_add            = i40e_ndo_fdb_add,
        .ndo_features_check     = i40e_features_check,
        .ndo_bridge_getlink     = i40e_ndo_bridge_getlink,
        .ndo_bridge_setlink     = i40e_ndo_bridge_setlink,
        .ndo_bpf                = i40e_xdp,
        .ndo_xdp_xmit           = i40e_xdp_xmit,
        .ndo_xsk_wakeup         = i40e_xsk_wakeup,
        .ndo_dfwd_add_station   = i40e_fwd_add,
        .ndo_dfwd_del_station   = i40e_fwd_del,
};

/**
 * i40e_config_netdev - Setup the netdev flags
 * @vsi: the VSI being configured
 *
 * Returns 0 on success, negative value on failure
 **/
static int i40e_config_netdev(struct i40e_vsi *vsi)
{
        struct i40e_pf *pf = vsi->back;
        struct i40e_hw *hw = &pf->hw;
        struct i40e_netdev_priv *np;
        struct net_device *netdev;
        u8 broadcast[ETH_ALEN];
        u8 mac_addr[ETH_ALEN];
        int etherdev_size;
        netdev_features_t hw_enc_features;
        netdev_features_t hw_features;

        etherdev_size = sizeof(struct i40e_netdev_priv);
        netdev = alloc_etherdev_mq(etherdev_size, vsi->alloc_queue_pairs);
        if (!netdev)
                return -ENOMEM;

        vsi->netdev = netdev;
        np = netdev_priv(netdev);
        np->vsi = vsi;

        hw_enc_features = NETIF_F_SG                    |
                          NETIF_F_HW_CSUM               |
                          NETIF_F_HIGHDMA               |
                          NETIF_F_SOFT_FEATURES         |
                          NETIF_F_TSO                   |
                          NETIF_F_TSO_ECN               |
                          NETIF_F_TSO6                  |
                          NETIF_F_GSO_GRE               |
                          NETIF_F_GSO_GRE_CSUM          |
                          NETIF_F_GSO_PARTIAL           |
                          NETIF_F_GSO_IPXIP4            |
                          NETIF_F_GSO_IPXIP6            |
                          NETIF_F_GSO_UDP_TUNNEL        |
                          NETIF_F_GSO_UDP_TUNNEL_CSUM   |
                          NETIF_F_GSO_UDP_L4            |
                          NETIF_F_SCTP_CRC              |
                          NETIF_F_RXHASH                |
                          NETIF_F_RXCSUM                |
                          0;

        if (!test_bit(I40E_HW_CAP_OUTER_UDP_CSUM, pf->hw.caps))
                netdev->gso_partial_features |= NETIF_F_GSO_UDP_TUNNEL_CSUM;

        netdev->udp_tunnel_nic_info = &pf->udp_tunnel_nic;

        netdev->gso_partial_features |= NETIF_F_GSO_GRE_CSUM;

        netdev->hw_enc_features |= hw_enc_features;

        /* record features VLANs can make use of */
        netdev->vlan_features |= hw_enc_features | NETIF_F_TSO_MANGLEID;

#define I40E_GSO_PARTIAL_FEATURES (NETIF_F_GSO_GRE |            \
                                   NETIF_F_GSO_GRE_CSUM |       \
                                   NETIF_F_GSO_IPXIP4 |         \
                                   NETIF_F_GSO_IPXIP6 |         \
                                   NETIF_F_GSO_UDP_TUNNEL |     \
                                   NETIF_F_GSO_UDP_TUNNEL_CSUM)

        netdev->gso_partial_features = I40E_GSO_PARTIAL_FEATURES;
        netdev->features |= NETIF_F_GSO_PARTIAL |
                            I40E_GSO_PARTIAL_FEATURES;

        netdev->mpls_features |= NETIF_F_SG;
        netdev->mpls_features |= NETIF_F_HW_CSUM;
        netdev->mpls_features |= NETIF_F_TSO;
        netdev->mpls_features |= NETIF_F_TSO6;
        netdev->mpls_features |= I40E_GSO_PARTIAL_FEATURES;

        /* enable macvlan offloads */
        netdev->hw_features |= NETIF_F_HW_L2FW_DOFFLOAD;

        hw_features = hw_enc_features           |
                      NETIF_F_HW_VLAN_CTAG_TX   |
                      NETIF_F_HW_VLAN_CTAG_RX;

        if (!test_bit(I40E_FLAG_MFP_ENA, pf->flags))
                hw_features |= NETIF_F_NTUPLE | NETIF_F_HW_TC;

        netdev->hw_features |= hw_features | NETIF_F_LOOPBACK;

        netdev->features |= hw_features | NETIF_F_HW_VLAN_CTAG_FILTER;
        netdev->hw_enc_features |= NETIF_F_TSO_MANGLEID;

        netdev->features &= ~NETIF_F_HW_TC;

        if (vsi->type == I40E_VSI_MAIN) {
                SET_NETDEV_DEV(netdev, &pf->pdev->dev);
                ether_addr_copy(mac_addr, hw->mac.perm_addr);
                /* The following steps are necessary for two reasons. First,
                 * some older NVM configurations load a default MAC-VLAN
                 * filter that will accept any tagged packet, and we want to
                 * replace this with a normal filter. Additionally, it is
                 * possible our MAC address was provided by the platform using
                 * Open Firmware or similar.
                 *
                 * Thus, we need to remove the default filter and install one
                 * specific to the MAC address.
                 */
                i40e_rm_default_mac_filter(vsi, mac_addr);
                spin_lock_bh(&vsi->mac_filter_hash_lock);
                i40e_add_mac_filter(vsi, mac_addr);
                spin_unlock_bh(&vsi->mac_filter_hash_lock);

                netdev->xdp_features = NETDEV_XDP_ACT_BASIC |
                                       NETDEV_XDP_ACT_REDIRECT |
                                       NETDEV_XDP_ACT_XSK_ZEROCOPY |
                                       NETDEV_XDP_ACT_RX_SG;
                netdev->xdp_zc_max_segs = I40E_MAX_BUFFER_TXD;
        } else {
                /* Relate the VSI_VMDQ name to the VSI_MAIN name. Note that we
                 * are still limited by IFNAMSIZ, but we're adding 'v%d\0' to
                 * the end, which is 4 bytes long, so force truncation of the
                 * original name by IFNAMSIZ - 4
                 */
                struct i40e_vsi *main_vsi = i40e_pf_get_main_vsi(pf);

                snprintf(netdev->name, IFNAMSIZ, "%.*sv%%d", IFNAMSIZ - 4,
                         main_vsi->netdev->name);
                eth_random_addr(mac_addr);

                spin_lock_bh(&vsi->mac_filter_hash_lock);
                i40e_add_mac_filter(vsi, mac_addr);
                spin_unlock_bh(&vsi->mac_filter_hash_lock);
        }

        /* Add the broadcast filter so that we initially will receive
         * broadcast packets. Note that when a new VLAN is first added the
         * driver will convert all filters marked I40E_VLAN_ANY into VLAN
         * specific filters as part of transitioning into "vlan" operation.
         * When more VLANs are added, the driver will copy each existing MAC
         * filter and add it for the new VLAN.
         *
         * Broadcast filters are handled specially by
         * i40e_sync_filters_subtask, as the driver must to set the broadcast
         * promiscuous bit instead of adding this directly as a MAC/VLAN
         * filter. The subtask will update the correct broadcast promiscuous
         * bits as VLANs become active or inactive.
         */
        eth_broadcast_addr(broadcast);
        spin_lock_bh(&vsi->mac_filter_hash_lock);
        i40e_add_mac_filter(vsi, broadcast);
        spin_unlock_bh(&vsi->mac_filter_hash_lock);

        eth_hw_addr_set(netdev, mac_addr);
        ether_addr_copy(netdev->perm_addr, mac_addr);

        /* i40iw_net_event() reads 16 bytes from neigh->primary_key */
        netdev->neigh_priv_len = sizeof(u32) * 4;

        netdev->priv_flags |= IFF_UNICAST_FLT;
        netdev->priv_flags |= IFF_SUPP_NOFCS;
        /* Setup netdev TC information */
        i40e_vsi_config_netdev_tc(vsi, vsi->tc_config.enabled_tc);

        netdev->netdev_ops = &i40e_netdev_ops;
        netdev->watchdog_timeo = 5 * HZ;
        i40e_set_ethtool_ops(netdev);

        /* MTU range: 68 - 9706 */
        netdev->min_mtu = ETH_MIN_MTU;
        netdev->max_mtu = I40E_MAX_RXBUFFER - I40E_PACKET_HDR_PAD;

        return 0;
}

/**
 * i40e_vsi_delete - Delete a VSI from the switch
 * @vsi: the VSI being removed
 *
 * Returns 0 on success, negative value on failure
 **/
static void i40e_vsi_delete(struct i40e_vsi *vsi)
{
        /* remove default VSI is not allowed */
        if (vsi == vsi->back->vsi[vsi->back->lan_vsi])
                return;

        i40e_aq_delete_element(&vsi->back->hw, vsi->seid, NULL);
}

/**
 * i40e_is_vsi_uplink_mode_veb - Check if the VSI's uplink bridge mode is VEB
 * @vsi: the VSI being queried
 *
 * Returns 1 if HW bridge mode is VEB and return 0 in case of VEPA mode
 **/
int i40e_is_vsi_uplink_mode_veb(struct i40e_vsi *vsi)
{
        struct i40e_veb *veb;
        struct i40e_pf *pf = vsi->back;

        /* Uplink is not a bridge so default to VEB */
        if (vsi->veb_idx >= I40E_MAX_VEB)
                return 1;

        veb = pf->veb[vsi->veb_idx];
        if (!veb) {
                dev_info(&pf->pdev->dev,
                         "There is no veb associated with the bridge\n");
                return -ENOENT;
        }

        /* Uplink is a bridge in VEPA mode */
        if (veb->bridge_mode & BRIDGE_MODE_VEPA) {
                return 0;
        } else {
                /* Uplink is a bridge in VEB mode */
                return 1;
        }

        /* VEPA is now default bridge, so return 0 */
        return 0;
}

/**
 * i40e_add_vsi - Add a VSI to the switch
 * @vsi: the VSI being configured
 *
 * This initializes a VSI context depending on the VSI type to be added and
 * passes it down to the add_vsi aq command.
 **/
static int i40e_add_vsi(struct i40e_vsi *vsi)
{
        int ret = -ENODEV;
        struct i40e_pf *pf = vsi->back;
        struct i40e_hw *hw = &pf->hw;
        struct i40e_vsi_context ctxt;
        struct i40e_mac_filter *f;
        struct hlist_node *h;
        int bkt;

        u8 enabled_tc = 0x1; /* TC0 enabled */
        int f_count = 0;

        memset(&ctxt, 0, sizeof(ctxt));
        switch (vsi->type) {
        case I40E_VSI_MAIN:
                /* The PF's main VSI is already setup as part of the
                 * device initialization, so we'll not bother with
                 * the add_vsi call, but we will retrieve the current
                 * VSI context.
                 */
                ctxt.seid = pf->main_vsi_seid;
                ctxt.pf_num = pf->hw.pf_id;
                ctxt.vf_num = 0;
                ret = i40e_aq_get_vsi_params(&pf->hw, &ctxt, NULL);
                ctxt.flags = I40E_AQ_VSI_TYPE_PF;
                if (ret) {
                        dev_info(&pf->pdev->dev,
                                 "couldn't get PF vsi config, err %pe aq_err %s\n",
                                 ERR_PTR(ret),
                                 i40e_aq_str(&pf->hw,
                                             pf->hw.aq.asq_last_status));
                        return -ENOENT;
                }
                vsi->info = ctxt.info;
                vsi->info.valid_sections = 0;

                vsi->seid = ctxt.seid;
                vsi->id = ctxt.vsi_number;

                enabled_tc = i40e_pf_get_tc_map(pf);

                /* Source pruning is enabled by default, so the flag is
                 * negative logic - if it's set, we need to fiddle with
                 * the VSI to disable source pruning.
                 */
                if (test_bit(I40E_FLAG_SOURCE_PRUNING_DIS, pf->flags)) {
                        memset(&ctxt, 0, sizeof(ctxt));
                        ctxt.seid = pf->main_vsi_seid;
                        ctxt.pf_num = pf->hw.pf_id;
                        ctxt.vf_num = 0;
                        ctxt.info.valid_sections |=
                                     cpu_to_le16(I40E_AQ_VSI_PROP_SWITCH_VALID);
                        ctxt.info.switch_id =
                                   cpu_to_le16(I40E_AQ_VSI_SW_ID_FLAG_LOCAL_LB);
                        ret = i40e_aq_update_vsi_params(hw, &ctxt, NULL);
                        if (ret) {
                                dev_info(&pf->pdev->dev,
                                         "update vsi failed, err %d aq_err %s\n",
                                         ret,
                                         i40e_aq_str(&pf->hw,
                                                     pf->hw.aq.asq_last_status));
                                ret = -ENOENT;
                                goto err;
                        }
                }

                /* MFP mode setup queue map and update VSI */
                if (test_bit(I40E_FLAG_MFP_ENA, pf->flags) &&
                    !(pf->hw.func_caps.iscsi)) { /* NIC type PF */
                        memset(&ctxt, 0, sizeof(ctxt));
                        ctxt.seid = pf->main_vsi_seid;
                        ctxt.pf_num = pf->hw.pf_id;
                        ctxt.vf_num = 0;
                        i40e_vsi_setup_queue_map(vsi, &ctxt, enabled_tc, false);
                        ret = i40e_aq_update_vsi_params(hw, &ctxt, NULL);
                        if (ret) {
                                dev_info(&pf->pdev->dev,
                                         "update vsi failed, err %pe aq_err %s\n",
                                         ERR_PTR(ret),
                                         i40e_aq_str(&pf->hw,
                                                    pf->hw.aq.asq_last_status));
                                ret = -ENOENT;
                                goto err;
                        }
                        /* update the local VSI info queue map */
                        i40e_vsi_update_queue_map(vsi, &ctxt);
                        vsi->info.valid_sections = 0;
                } else {
                        /* Default/Main VSI is only enabled for TC0
                         * reconfigure it to enable all TCs that are
                         * available on the port in SFP mode.
                         * For MFP case the iSCSI PF would use this
                         * flow to enable LAN+iSCSI TC.
                         */
                        ret = i40e_vsi_config_tc(vsi, enabled_tc);
                        if (ret) {
                                /* Single TC condition is not fatal,
                                 * message and continue
                                 */
                                dev_info(&pf->pdev->dev,
                                         "failed to configure TCs for main VSI tc_map 0x%08x, err %pe aq_err %s\n",
                                         enabled_tc,
                                         ERR_PTR(ret),
                                         i40e_aq_str(&pf->hw,
                                                    pf->hw.aq.asq_last_status));
                        }
                }
                break;

        case I40E_VSI_FDIR:
                ctxt.pf_num = hw->pf_id;
                ctxt.vf_num = 0;
                ctxt.uplink_seid = vsi->uplink_seid;
                ctxt.connection_type = I40E_AQ_VSI_CONN_TYPE_NORMAL;
                ctxt.flags = I40E_AQ_VSI_TYPE_PF;
                if (test_bit(I40E_FLAG_VEB_MODE_ENA, pf->flags) &&
                    (i40e_is_vsi_uplink_mode_veb(vsi))) {
                        ctxt.info.valid_sections |=
                             cpu_to_le16(I40E_AQ_VSI_PROP_SWITCH_VALID);
                        ctxt.info.switch_id =
                           cpu_to_le16(I40E_AQ_VSI_SW_ID_FLAG_ALLOW_LB);
                }
                i40e_vsi_setup_queue_map(vsi, &ctxt, enabled_tc, true);
                break;

        case I40E_VSI_VMDQ2:
                ctxt.pf_num = hw->pf_id;
                ctxt.vf_num = 0;
                ctxt.uplink_seid = vsi->uplink_seid;
                ctxt.connection_type = I40E_AQ_VSI_CONN_TYPE_NORMAL;
                ctxt.flags = I40E_AQ_VSI_TYPE_VMDQ2;

                /* This VSI is connected to VEB so the switch_id
                 * should be set to zero by default.
                 */
                if (i40e_is_vsi_uplink_mode_veb(vsi)) {
                        ctxt.info.valid_sections |=
                                cpu_to_le16(I40E_AQ_VSI_PROP_SWITCH_VALID);
                        ctxt.info.switch_id =
                                cpu_to_le16(I40E_AQ_VSI_SW_ID_FLAG_ALLOW_LB);
                }

                /* Setup the VSI tx/rx queue map for TC0 only for now */
                i40e_vsi_setup_queue_map(vsi, &ctxt, enabled_tc, true);
                break;

        case I40E_VSI_SRIOV:
                ctxt.pf_num = hw->pf_id;
                ctxt.vf_num = vsi->vf_id + hw->func_caps.vf_base_id;
                ctxt.uplink_seid = vsi->uplink_seid;
                ctxt.connection_type = I40E_AQ_VSI_CONN_TYPE_NORMAL;
                ctxt.flags = I40E_AQ_VSI_TYPE_VF;

                /* This VSI is connected to VEB so the switch_id
                 * should be set to zero by default.
                 */
                if (i40e_is_vsi_uplink_mode_veb(vsi)) {
                        ctxt.info.valid_sections |=
                                cpu_to_le16(I40E_AQ_VSI_PROP_SWITCH_VALID);
                        ctxt.info.switch_id =
                                cpu_to_le16(I40E_AQ_VSI_SW_ID_FLAG_ALLOW_LB);
                }

                if (test_bit(I40E_FLAG_IWARP_ENA, vsi->back->flags)) {
                        ctxt.info.valid_sections |=
                                cpu_to_le16(I40E_AQ_VSI_PROP_QUEUE_OPT_VALID);
                        ctxt.info.queueing_opt_flags |=
                                (I40E_AQ_VSI_QUE_OPT_TCP_ENA |
                                 I40E_AQ_VSI_QUE_OPT_RSS_LUT_VSI);
                }

                ctxt.info.valid_sections |= cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID);
                ctxt.info.port_vlan_flags |= I40E_AQ_VSI_PVLAN_MODE_ALL;
                if (pf->vf[vsi->vf_id].spoofchk) {
                        ctxt.info.valid_sections |=
                                cpu_to_le16(I40E_AQ_VSI_PROP_SECURITY_VALID);
                        ctxt.info.sec_flags |=
                                (I40E_AQ_VSI_SEC_FLAG_ENABLE_VLAN_CHK |
                                 I40E_AQ_VSI_SEC_FLAG_ENABLE_MAC_CHK);
                }
                /* Setup the VSI tx/rx queue map for TC0 only for now */
                i40e_vsi_setup_queue_map(vsi, &ctxt, enabled_tc, true);
                break;

        case I40E_VSI_IWARP:
                /* send down message to iWARP */
                break;

        default:
                return -ENODEV;
        }

        if (vsi->type != I40E_VSI_MAIN) {
                ret = i40e_aq_add_vsi(hw, &ctxt, NULL);
                if (ret) {
                        dev_info(&vsi->back->pdev->dev,
                                 "add vsi failed, err %pe aq_err %s\n",
                                 ERR_PTR(ret),
                                 i40e_aq_str(&pf->hw,
                                             pf->hw.aq.asq_last_status));
                        ret = -ENOENT;
                        goto err;
                }
                vsi->info = ctxt.info;
                vsi->info.valid_sections = 0;
                vsi->seid = ctxt.seid;
                vsi->id = ctxt.vsi_number;
        }

        spin_lock_bh(&vsi->mac_filter_hash_lock);
        vsi->active_filters = 0;
        /* If macvlan filters already exist, force them to get loaded */
        hash_for_each_safe(vsi->mac_filter_hash, bkt, h, f, hlist) {
                f->state = I40E_FILTER_NEW;
                f_count++;
        }
        spin_unlock_bh(&vsi->mac_filter_hash_lock);
        clear_bit(__I40E_VSI_OVERFLOW_PROMISC, vsi->state);

        if (f_count) {
                vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
                set_bit(__I40E_MACVLAN_SYNC_PENDING, pf->state);
        }

        /* Update VSI BW information */
        ret = i40e_vsi_get_bw_info(vsi);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "couldn't get vsi bw info, err %pe aq_err %s\n",
                         ERR_PTR(ret),
                         i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
                /* VSI is already added so not tearing that up */
                ret = 0;
        }

err:
        return ret;
}

/**
 * i40e_vsi_release - Delete a VSI and free its resources
 * @vsi: the VSI being removed
 *
 * Returns 0 on success or < 0 on error
 **/
int i40e_vsi_release(struct i40e_vsi *vsi)
{
        struct i40e_mac_filter *f;
        struct hlist_node *h;
        struct i40e_veb *veb;
        struct i40e_pf *pf;
        u16 uplink_seid;
        int i, n, bkt;

        pf = vsi->back;

        /* release of a VEB-owner or last VSI is not allowed */
        if (vsi->flags & I40E_VSI_FLAG_VEB_OWNER) {
                dev_info(&pf->pdev->dev, "VSI %d has existing VEB %d\n",
                         vsi->seid, vsi->uplink_seid);
                return -ENODEV;
        }
        if (vsi->type == I40E_VSI_MAIN && !test_bit(__I40E_DOWN, pf->state)) {
                dev_info(&pf->pdev->dev, "Can't remove PF VSI\n");
                return -ENODEV;
        }
        set_bit(__I40E_VSI_RELEASING, vsi->state);
        uplink_seid = vsi->uplink_seid;

        if (vsi->type != I40E_VSI_SRIOV) {
                if (vsi->netdev_registered) {
                        vsi->netdev_registered = false;
                        if (vsi->netdev) {
                                /* results in a call to i40e_close() */
                                unregister_netdev(vsi->netdev);
                        }
                } else {
                        i40e_vsi_close(vsi);
                }
                i40e_vsi_disable_irq(vsi);
        }

        if (vsi->type == I40E_VSI_MAIN)
                i40e_devlink_destroy_port(pf);

        spin_lock_bh(&vsi->mac_filter_hash_lock);

        /* clear the sync flag on all filters */
        if (vsi->netdev) {
                __dev_uc_unsync(vsi->netdev, NULL);
                __dev_mc_unsync(vsi->netdev, NULL);
        }

        /* make sure any remaining filters are marked for deletion */
        hash_for_each_safe(vsi->mac_filter_hash, bkt, h, f, hlist)
                __i40e_del_filter(vsi, f);

        spin_unlock_bh(&vsi->mac_filter_hash_lock);

        i40e_sync_vsi_filters(vsi);

        i40e_vsi_delete(vsi);
        i40e_vsi_free_q_vectors(vsi);
        if (vsi->netdev) {
                free_netdev(vsi->netdev);
                vsi->netdev = NULL;
        }
        i40e_vsi_clear_rings(vsi);
        i40e_vsi_clear(vsi);

        /* If this was the last thing on the VEB, except for the
         * controlling VSI, remove the VEB, which puts the controlling
         * VSI onto the uplink port.
         *
         * Well, okay, there's one more exception here: don't remove
         * the floating VEBs yet.  We'll wait for an explicit remove request
         * from up the network stack.
         */
        veb = i40e_pf_get_veb_by_seid(pf, uplink_seid);
        if (veb && veb->uplink_seid) {
                n = 0;

                /* Count non-controlling VSIs present on  the VEB */
                i40e_pf_for_each_vsi(pf, i, vsi)
                        if (vsi->uplink_seid == uplink_seid &&
                            (vsi->flags & I40E_VSI_FLAG_VEB_OWNER) == 0)
                                n++;

                /* If there is no VSI except the control one then release
                 * the VEB and put the control VSI onto VEB uplink.
                 */
                if (!n)
                        i40e_veb_release(veb);
        }

        return 0;
}

/**
 * i40e_vsi_setup_vectors - Set up the q_vectors for the given VSI
 * @vsi: ptr to the VSI
 *
 * This should only be called after i40e_vsi_mem_alloc() which allocates the
 * corresponding SW VSI structure and initializes num_queue_pairs for the
 * newly allocated VSI.
 *
 * Returns 0 on success or negative on failure
 **/
static int i40e_vsi_setup_vectors(struct i40e_vsi *vsi)
{
        int ret = -ENOENT;
        struct i40e_pf *pf = vsi->back;

        if (vsi->q_vectors[0]) {
                dev_info(&pf->pdev->dev, "VSI %d has existing q_vectors\n",
                         vsi->seid);
                return -EEXIST;
        }

        if (vsi->base_vector) {
                dev_info(&pf->pdev->dev, "VSI %d has non-zero base vector %d\n",
                         vsi->seid, vsi->base_vector);
                return -EEXIST;
        }

        ret = i40e_vsi_alloc_q_vectors(vsi);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "failed to allocate %d q_vector for VSI %d, ret=%d\n",
                         vsi->num_q_vectors, vsi->seid, ret);
                vsi->num_q_vectors = 0;
                goto vector_setup_out;
        }

        /* In Legacy mode, we do not have to get any other vector since we
         * piggyback on the misc/ICR0 for queue interrupts.
        */
        if (!test_bit(I40E_FLAG_MSIX_ENA, pf->flags))
                return ret;
        if (vsi->num_q_vectors)
                vsi->base_vector = i40e_get_lump(pf, pf->irq_pile,
                                                 vsi->num_q_vectors, vsi->idx);
        if (vsi->base_vector < 0) {
                dev_info(&pf->pdev->dev,
                         "failed to get tracking for %d vectors for VSI %d, err=%d\n",
                         vsi->num_q_vectors, vsi->seid, vsi->base_vector);
                i40e_vsi_free_q_vectors(vsi);
                ret = -ENOENT;
                goto vector_setup_out;
        }

vector_setup_out:
        return ret;
}

/**
 * i40e_vsi_reinit_setup - return and reallocate resources for a VSI
 * @vsi: pointer to the vsi.
 *
 * This re-allocates a vsi's queue resources.
 *
 * Returns pointer to the successfully allocated and configured VSI sw struct
 * on success, otherwise returns NULL on failure.
 **/
static struct i40e_vsi *i40e_vsi_reinit_setup(struct i40e_vsi *vsi)
{
        struct i40e_vsi *main_vsi;
        u16 alloc_queue_pairs;
        struct i40e_pf *pf;
        int ret;

        if (!vsi)
                return NULL;

        pf = vsi->back;

        i40e_put_lump(pf->qp_pile, vsi->base_queue, vsi->idx);
        i40e_vsi_clear_rings(vsi);

        i40e_vsi_free_arrays(vsi, false);
        i40e_set_num_rings_in_vsi(vsi);
        ret = i40e_vsi_alloc_arrays(vsi, false);
        if (ret)
                goto err_vsi;

        alloc_queue_pairs = vsi->alloc_queue_pairs *
                            (i40e_enabled_xdp_vsi(vsi) ? 2 : 1);

        ret = i40e_get_lump(pf, pf->qp_pile, alloc_queue_pairs, vsi->idx);
        if (ret < 0) {
                dev_info(&pf->pdev->dev,
                         "failed to get tracking for %d queues for VSI %d err %d\n",
                         alloc_queue_pairs, vsi->seid, ret);
                goto err_vsi;
        }
        vsi->base_queue = ret;

        /* Update the FW view of the VSI. Force a reset of TC and queue
         * layout configurations.
         */
        main_vsi = i40e_pf_get_main_vsi(pf);
        main_vsi->seid = pf->main_vsi_seid;
        i40e_vsi_reconfig_tc(main_vsi);

        if (vsi->type == I40E_VSI_MAIN)
                i40e_rm_default_mac_filter(vsi, pf->hw.mac.perm_addr);

        /* assign it some queues */
        ret = i40e_alloc_rings(vsi);
        if (ret)
                goto err_rings;

        /* map all of the rings to the q_vectors */
        i40e_vsi_map_rings_to_vectors(vsi);
        return vsi;

err_rings:
        i40e_vsi_free_q_vectors(vsi);
        if (vsi->netdev_registered) {
                vsi->netdev_registered = false;
                unregister_netdev(vsi->netdev);
                free_netdev(vsi->netdev);
                vsi->netdev = NULL;
        }
        if (vsi->type == I40E_VSI_MAIN)
                i40e_devlink_destroy_port(pf);
        i40e_aq_delete_element(&pf->hw, vsi->seid, NULL);
err_vsi:
        i40e_vsi_clear(vsi);
        return NULL;
}

/**
 * i40e_vsi_setup - Set up a VSI by a given type
 * @pf: board private structure
 * @type: VSI type
 * @uplink_seid: the switch element to link to
 * @param1: usage depends upon VSI type. For VF types, indicates VF id
 *
 * This allocates the sw VSI structure and its queue resources, then add a VSI
 * to the identified VEB.
 *
 * Returns pointer to the successfully allocated and configure VSI sw struct on
 * success, otherwise returns NULL on failure.
 **/
struct i40e_vsi *i40e_vsi_setup(struct i40e_pf *pf, u8 type,
                                u16 uplink_seid, u32 param1)
{
        struct i40e_vsi *vsi = NULL;
        struct i40e_veb *veb = NULL;
        u16 alloc_queue_pairs;
        int v_idx;
        int ret;

        /* The requested uplink_seid must be either
         *     - the PF's port seid
         *              no VEB is needed because this is the PF
         *              or this is a Flow Director special case VSI
         *     - seid of an existing VEB
         *     - seid of a VSI that owns an existing VEB
         *     - seid of a VSI that doesn't own a VEB
         *              a new VEB is created and the VSI becomes the owner
         *     - seid of the PF VSI, which is what creates the first VEB
         *              this is a special case of the previous
         *
         * Find which uplink_seid we were given and create a new VEB if needed
         */
        veb = i40e_pf_get_veb_by_seid(pf, uplink_seid);
        if (!veb && uplink_seid != pf->mac_seid) {
                vsi = i40e_pf_get_vsi_by_seid(pf, uplink_seid);
                if (!vsi) {
                        dev_info(&pf->pdev->dev, "no such uplink_seid %d\n",
                                 uplink_seid);
                        return NULL;
                }

                if (vsi->uplink_seid == pf->mac_seid)
                        veb = i40e_veb_setup(pf, pf->mac_seid, vsi->seid,
                                             vsi->tc_config.enabled_tc);
                else if ((vsi->flags & I40E_VSI_FLAG_VEB_OWNER) == 0)
                        veb = i40e_veb_setup(pf, vsi->uplink_seid, vsi->seid,
                                             vsi->tc_config.enabled_tc);
                if (veb) {
                        if (vsi->type != I40E_VSI_MAIN) {
                                dev_info(&vsi->back->pdev->dev,
                                         "New VSI creation error, uplink seid of LAN VSI expected.\n");
                                return NULL;
                        }
                        /* We come up by default in VEPA mode if SRIOV is not
                         * already enabled, in which case we can't force VEPA
                         * mode.
                         */
                        if (!test_bit(I40E_FLAG_VEB_MODE_ENA, pf->flags)) {
                                veb->bridge_mode = BRIDGE_MODE_VEPA;
                                clear_bit(I40E_FLAG_VEB_MODE_ENA, pf->flags);
                        }
                        i40e_config_bridge_mode(veb);
                }
                veb = i40e_pf_get_veb_by_seid(pf, vsi->uplink_seid);
                if (!veb) {
                        dev_info(&pf->pdev->dev, "couldn't add VEB\n");
                        return NULL;
                }

                vsi->flags |= I40E_VSI_FLAG_VEB_OWNER;
                uplink_seid = veb->seid;
        }

        /* get vsi sw struct */
        v_idx = i40e_vsi_mem_alloc(pf, type);
        if (v_idx < 0)
                goto err_alloc;
        vsi = pf->vsi[v_idx];
        if (!vsi)
                goto err_alloc;
        vsi->type = type;
        vsi->veb_idx = (veb ? veb->idx : I40E_NO_VEB);

        if (type == I40E_VSI_MAIN)
                pf->lan_vsi = v_idx;
        else if (type == I40E_VSI_SRIOV)
                vsi->vf_id = param1;
        /* assign it some queues */
        alloc_queue_pairs = vsi->alloc_queue_pairs *
                            (i40e_enabled_xdp_vsi(vsi) ? 2 : 1);

        ret = i40e_get_lump(pf, pf->qp_pile, alloc_queue_pairs, vsi->idx);
        if (ret < 0) {
                dev_info(&pf->pdev->dev,
                         "failed to get tracking for %d queues for VSI %d err=%d\n",
                         alloc_queue_pairs, vsi->seid, ret);
                goto err_vsi;
        }
        vsi->base_queue = ret;

        /* get a VSI from the hardware */
        vsi->uplink_seid = uplink_seid;
        ret = i40e_add_vsi(vsi);
        if (ret)
                goto err_vsi;

        switch (vsi->type) {
        /* setup the netdev if needed */
        case I40E_VSI_MAIN:
        case I40E_VSI_VMDQ2:
                ret = i40e_config_netdev(vsi);
                if (ret)
                        goto err_netdev;
                ret = i40e_netif_set_realnum_tx_rx_queues(vsi);
                if (ret)
                        goto err_netdev;
                if (vsi->type == I40E_VSI_MAIN) {
                        ret = i40e_devlink_create_port(pf);
                        if (ret)
                                goto err_netdev;
                        SET_NETDEV_DEVLINK_PORT(vsi->netdev, &pf->devlink_port);
                }
                ret = register_netdev(vsi->netdev);
                if (ret)
                        goto err_dl_port;
                vsi->netdev_registered = true;
                netif_carrier_off(vsi->netdev);
#ifdef CONFIG_I40E_DCB
                /* Setup DCB netlink interface */
                i40e_dcbnl_setup(vsi);
#endif /* CONFIG_I40E_DCB */
                fallthrough;
        case I40E_VSI_FDIR:
                /* set up vectors and rings if needed */
                ret = i40e_vsi_setup_vectors(vsi);
                if (ret)
                        goto err_msix;

                ret = i40e_alloc_rings(vsi);
                if (ret)
                        goto err_rings;

                /* map all of the rings to the q_vectors */
                i40e_vsi_map_rings_to_vectors(vsi);

                i40e_vsi_reset_stats(vsi);
                break;
        default:
                /* no netdev or rings for the other VSI types */
                break;
        }

        if (test_bit(I40E_HW_CAP_RSS_AQ, pf->hw.caps) &&
            vsi->type == I40E_VSI_VMDQ2) {
                ret = i40e_vsi_config_rss(vsi);
                if (ret)
                        goto err_config;
        }
        return vsi;

err_config:
        i40e_vsi_clear_rings(vsi);
err_rings:
        i40e_vsi_free_q_vectors(vsi);
err_msix:
        if (vsi->netdev_registered) {
                vsi->netdev_registered = false;
                unregister_netdev(vsi->netdev);
                free_netdev(vsi->netdev);
                vsi->netdev = NULL;
        }
err_dl_port:
        if (vsi->type == I40E_VSI_MAIN)
                i40e_devlink_destroy_port(pf);
err_netdev:
        i40e_aq_delete_element(&pf->hw, vsi->seid, NULL);
err_vsi:
        i40e_vsi_clear(vsi);
err_alloc:
        return NULL;
}

/**
 * i40e_veb_get_bw_info - Query VEB BW information
 * @veb: the veb to query
 *
 * Query the Tx scheduler BW configuration data for given VEB
 **/
static int i40e_veb_get_bw_info(struct i40e_veb *veb)
{
        struct i40e_aqc_query_switching_comp_ets_config_resp ets_data;
        struct i40e_aqc_query_switching_comp_bw_config_resp bw_data;
        struct i40e_pf *pf = veb->pf;
        struct i40e_hw *hw = &pf->hw;
        u32 tc_bw_max;
        int ret = 0;
        int i;

        ret = i40e_aq_query_switch_comp_bw_config(hw, veb->seid,
                                                  &bw_data, NULL);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "query veb bw config failed, err %pe aq_err %s\n",
                         ERR_PTR(ret),
                         i40e_aq_str(&pf->hw, hw->aq.asq_last_status));
                goto out;
        }

        ret = i40e_aq_query_switch_comp_ets_config(hw, veb->seid,
                                                   &ets_data, NULL);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "query veb bw ets config failed, err %pe aq_err %s\n",
                         ERR_PTR(ret),
                         i40e_aq_str(&pf->hw, hw->aq.asq_last_status));
                goto out;
        }

        veb->bw_limit = le16_to_cpu(ets_data.port_bw_limit);
        veb->bw_max_quanta = ets_data.tc_bw_max;
        veb->is_abs_credits = bw_data.absolute_credits_enable;
        veb->enabled_tc = ets_data.tc_valid_bits;
        tc_bw_max = le16_to_cpu(bw_data.tc_bw_max[0]) |
                    (le16_to_cpu(bw_data.tc_bw_max[1]) << 16);
        for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
                veb->bw_tc_share_credits[i] = bw_data.tc_bw_share_credits[i];
                veb->bw_tc_limit_credits[i] =
                                        le16_to_cpu(bw_data.tc_bw_limits[i]);
                veb->bw_tc_max_quanta[i] = ((tc_bw_max >> (i*4)) & 0x7);
        }

out:
        return ret;
}

/**
 * i40e_veb_mem_alloc - Allocates the next available struct veb in the PF
 * @pf: board private structure
 *
 * On error: returns error code (negative)
 * On success: returns vsi index in PF (positive)
 **/
static int i40e_veb_mem_alloc(struct i40e_pf *pf)
{
        int ret = -ENOENT;
        struct i40e_veb *veb;
        int i;

        /* Need to protect the allocation of switch elements at the PF level */
        mutex_lock(&pf->switch_mutex);

        /* VEB list may be fragmented if VEB creation/destruction has
         * been happening.  We can afford to do a quick scan to look
         * for any free slots in the list.
         *
         * find next empty veb slot, looping back around if necessary
         */
        i = 0;
        while ((i < I40E_MAX_VEB) && (pf->veb[i] != NULL))
                i++;
        if (i >= I40E_MAX_VEB) {
                ret = -ENOMEM;
                goto err_alloc_veb;  /* out of VEB slots! */
        }

        veb = kzalloc(sizeof(*veb), GFP_KERNEL);
        if (!veb) {
                ret = -ENOMEM;
                goto err_alloc_veb;
        }
        veb->pf = pf;
        veb->idx = i;
        veb->enabled_tc = 1;

        pf->veb[i] = veb;
        ret = i;
err_alloc_veb:
        mutex_unlock(&pf->switch_mutex);
        return ret;
}

/**
 * i40e_switch_branch_release - Delete a branch of the switch tree
 * @branch: where to start deleting
 *
 * This uses recursion to find the tips of the branch to be
 * removed, deleting until we get back to and can delete this VEB.
 **/
static void i40e_switch_branch_release(struct i40e_veb *branch)
{
        struct i40e_pf *pf = branch->pf;
        u16 branch_seid = branch->seid;
        u16 veb_idx = branch->idx;
        struct i40e_vsi *vsi;
        struct i40e_veb *veb;
        int i;

        /* release any VEBs on this VEB - RECURSION */
        i40e_pf_for_each_veb(pf, i, veb)
                if (veb->uplink_seid == branch->seid)
                        i40e_switch_branch_release(veb);

        /* Release the VSIs on this VEB, but not the owner VSI.
         *
         * NOTE: Removing the last VSI on a VEB has the SIDE EFFECT of removing
         *       the VEB itself, so don't use (*branch) after this loop.
         */
        i40e_pf_for_each_vsi(pf, i, vsi)
                if (vsi->uplink_seid == branch_seid &&
                    (vsi->flags & I40E_VSI_FLAG_VEB_OWNER) == 0)
                        i40e_vsi_release(vsi);

        /* There's one corner case where the VEB might not have been
         * removed, so double check it here and remove it if needed.
         * This case happens if the veb was created from the debugfs
         * commands and no VSIs were added to it.
         */
        if (pf->veb[veb_idx])
                i40e_veb_release(pf->veb[veb_idx]);
}

/**
 * i40e_veb_clear - remove veb struct
 * @veb: the veb to remove
 **/
static void i40e_veb_clear(struct i40e_veb *veb)
{
        if (!veb)
                return;

        if (veb->pf) {
                struct i40e_pf *pf = veb->pf;

                mutex_lock(&pf->switch_mutex);
                if (pf->veb[veb->idx] == veb)
                        pf->veb[veb->idx] = NULL;
                mutex_unlock(&pf->switch_mutex);
        }

        kfree(veb);
}

/**
 * i40e_veb_release - Delete a VEB and free its resources
 * @veb: the VEB being removed
 **/
void i40e_veb_release(struct i40e_veb *veb)
{
        struct i40e_vsi *vsi, *vsi_it;
        struct i40e_pf *pf;
        int i, n = 0;

        pf = veb->pf;

        /* find the remaining VSI and check for extras */
        i40e_pf_for_each_vsi(pf, i, vsi_it)
                if (vsi_it->uplink_seid == veb->seid) {
                        if (vsi_it->flags & I40E_VSI_FLAG_VEB_OWNER)
                                vsi = vsi_it;
                        n++;
                }

        /* Floating VEB has to be empty and regular one must have
         * single owner VSI.
         */
        if ((veb->uplink_seid && n != 1) || (!veb->uplink_seid && n != 0)) {
                dev_info(&pf->pdev->dev,
                         "can't remove VEB %d with %d VSIs left\n",
                         veb->seid, n);
                return;
        }

        /* For regular VEB move the owner VSI to uplink port */
        if (veb->uplink_seid) {
                vsi->flags &= ~I40E_VSI_FLAG_VEB_OWNER;
                vsi->uplink_seid = veb->uplink_seid;
                vsi->veb_idx = I40E_NO_VEB;
        }

        i40e_aq_delete_element(&pf->hw, veb->seid, NULL);
        i40e_veb_clear(veb);
}

/**
 * i40e_add_veb - create the VEB in the switch
 * @veb: the VEB to be instantiated
 * @vsi: the controlling VSI
 **/
static int i40e_add_veb(struct i40e_veb *veb, struct i40e_vsi *vsi)
{
        struct i40e_pf *pf = veb->pf;
        bool enable_stats = !!test_bit(I40E_FLAG_VEB_STATS_ENA, pf->flags);
        int ret;

        ret = i40e_aq_add_veb(&pf->hw, veb->uplink_seid, vsi ? vsi->seid : 0,
                              veb->enabled_tc, vsi ? false : true,
                              &veb->seid, enable_stats, NULL);

        /* get a VEB from the hardware */
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "couldn't add VEB, err %pe aq_err %s\n",
                         ERR_PTR(ret),
                         i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
                return -EPERM;
        }

        /* get statistics counter */
        ret = i40e_aq_get_veb_parameters(&pf->hw, veb->seid, NULL, NULL,
                                         &veb->stats_idx, NULL, NULL, NULL);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "couldn't get VEB statistics idx, err %pe aq_err %s\n",
                         ERR_PTR(ret),
                         i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
                return -EPERM;
        }
        ret = i40e_veb_get_bw_info(veb);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "couldn't get VEB bw info, err %pe aq_err %s\n",
                         ERR_PTR(ret),
                         i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
                i40e_aq_delete_element(&pf->hw, veb->seid, NULL);
                return -ENOENT;
        }

        if (vsi) {
                vsi->uplink_seid = veb->seid;
                vsi->veb_idx = veb->idx;
                vsi->flags |= I40E_VSI_FLAG_VEB_OWNER;
        }

        return 0;
}

/**
 * i40e_veb_setup - Set up a VEB
 * @pf: board private structure
 * @uplink_seid: the switch element to link to
 * @vsi_seid: the initial VSI seid
 * @enabled_tc: Enabled TC bit-map
 *
 * This allocates the sw VEB structure and links it into the switch
 * It is possible and legal for this to be a duplicate of an already
 * existing VEB.  It is also possible for both uplink and vsi seids
 * to be zero, in order to create a floating VEB.
 *
 * Returns pointer to the successfully allocated VEB sw struct on
 * success, otherwise returns NULL on failure.
 **/
struct i40e_veb *i40e_veb_setup(struct i40e_pf *pf, u16 uplink_seid,
                                u16 vsi_seid, u8 enabled_tc)
{
        struct i40e_vsi *vsi = NULL;
        struct i40e_veb *veb;
        int veb_idx;
        int ret;

        /* if one seid is 0, the other must be 0 to create a floating relay */
        if ((uplink_seid == 0 || vsi_seid == 0) &&
            (uplink_seid + vsi_seid != 0)) {
                dev_info(&pf->pdev->dev,
                         "one, not both seid's are 0: uplink=%d vsi=%d\n",
                         uplink_seid, vsi_seid);
                return NULL;
        }

        /* make sure there is such a vsi and uplink */
        if (vsi_seid) {
                vsi = i40e_pf_get_vsi_by_seid(pf, vsi_seid);
                if (!vsi) {
                        dev_err(&pf->pdev->dev, "vsi seid %d not found\n",
                                vsi_seid);
                        return NULL;
                }
        }

        /* get veb sw struct */
        veb_idx = i40e_veb_mem_alloc(pf);
        if (veb_idx < 0)
                goto err_alloc;
        veb = pf->veb[veb_idx];
        veb->uplink_seid = uplink_seid;
        veb->enabled_tc = (enabled_tc ? enabled_tc : 0x1);

        /* create the VEB in the switch */
        ret = i40e_add_veb(veb, vsi);
        if (ret)
                goto err_veb;

        if (vsi && vsi->idx == pf->lan_vsi)
                pf->lan_veb = veb->idx;

        return veb;

err_veb:
        i40e_veb_clear(veb);
err_alloc:
        return NULL;
}

/**
 * i40e_setup_pf_switch_element - set PF vars based on switch type
 * @pf: board private structure
 * @ele: element we are building info from
 * @num_reported: total number of elements
 * @printconfig: should we print the contents
 *
 * helper function to assist in extracting a few useful SEID values.
 **/
static void i40e_setup_pf_switch_element(struct i40e_pf *pf,
                                struct i40e_aqc_switch_config_element_resp *ele,
                                u16 num_reported, bool printconfig)
{
        u16 downlink_seid = le16_to_cpu(ele->downlink_seid);
        u16 uplink_seid = le16_to_cpu(ele->uplink_seid);
        u8 element_type = ele->element_type;
        u16 seid = le16_to_cpu(ele->seid);
        struct i40e_veb *veb;

        if (printconfig)
                dev_info(&pf->pdev->dev,
                         "type=%d seid=%d uplink=%d downlink=%d\n",
                         element_type, seid, uplink_seid, downlink_seid);

        switch (element_type) {
        case I40E_SWITCH_ELEMENT_TYPE_MAC:
                pf->mac_seid = seid;
                break;
        case I40E_SWITCH_ELEMENT_TYPE_VEB:
                /* Main VEB? */
                if (uplink_seid != pf->mac_seid)
                        break;
                veb = i40e_pf_get_main_veb(pf);
                if (!veb) {
                        int v;

                        /* find existing or else empty VEB */
                        veb = i40e_pf_get_veb_by_seid(pf, seid);
                        if (veb) {
                                pf->lan_veb = veb->idx;
                        } else {
                                v = i40e_veb_mem_alloc(pf);
                                if (v < 0)
                                        break;
                                pf->lan_veb = v;
                        }
                }

                /* Try to get again main VEB as pf->lan_veb may have changed */
                veb = i40e_pf_get_main_veb(pf);
                if (!veb)
                        break;

                veb->seid = seid;
                veb->uplink_seid = pf->mac_seid;
                veb->pf = pf;
                break;
        case I40E_SWITCH_ELEMENT_TYPE_VSI:
                if (num_reported != 1)
                        break;
                /* This is immediately after a reset so we can assume this is
                 * the PF's VSI
                 */
                pf->mac_seid = uplink_seid;
                pf->main_vsi_seid = seid;
                if (printconfig)
                        dev_info(&pf->pdev->dev,
                                 "pf_seid=%d main_vsi_seid=%d\n",
                                 downlink_seid, pf->main_vsi_seid);
                break;
        case I40E_SWITCH_ELEMENT_TYPE_PF:
        case I40E_SWITCH_ELEMENT_TYPE_VF:
        case I40E_SWITCH_ELEMENT_TYPE_EMP:
        case I40E_SWITCH_ELEMENT_TYPE_BMC:
        case I40E_SWITCH_ELEMENT_TYPE_PE:
        case I40E_SWITCH_ELEMENT_TYPE_PA:
                /* ignore these for now */
                break;
        default:
                dev_info(&pf->pdev->dev, "unknown element type=%d seid=%d\n",
                         element_type, seid);
                break;
        }
}

/**
 * i40e_fetch_switch_configuration - Get switch config from firmware
 * @pf: board private structure
 * @printconfig: should we print the contents
 *
 * Get the current switch configuration from the device and
 * extract a few useful SEID values.
 **/
int i40e_fetch_switch_configuration(struct i40e_pf *pf, bool printconfig)
{
        struct i40e_aqc_get_switch_config_resp *sw_config;
        u16 next_seid = 0;
        int ret = 0;
        u8 *aq_buf;
        int i;

        aq_buf = kzalloc(I40E_AQ_LARGE_BUF, GFP_KERNEL);
        if (!aq_buf)
                return -ENOMEM;

        sw_config = (struct i40e_aqc_get_switch_config_resp *)aq_buf;
        do {
                u16 num_reported, num_total;

                ret = i40e_aq_get_switch_config(&pf->hw, sw_config,
                                                I40E_AQ_LARGE_BUF,
                                                &next_seid, NULL);
                if (ret) {
                        dev_info(&pf->pdev->dev,
                                 "get switch config failed err %d aq_err %s\n",
                                 ret,
                                 i40e_aq_str(&pf->hw,
                                             pf->hw.aq.asq_last_status));
                        kfree(aq_buf);
                        return -ENOENT;
                }

                num_reported = le16_to_cpu(sw_config->header.num_reported);
                num_total = le16_to_cpu(sw_config->header.num_total);

                if (printconfig)
                        dev_info(&pf->pdev->dev,
                                 "header: %d reported %d total\n",
                                 num_reported, num_total);

                for (i = 0; i < num_reported; i++) {
                        struct i40e_aqc_switch_config_element_resp *ele =
                                &sw_config->element[i];

                        i40e_setup_pf_switch_element(pf, ele, num_reported,
                                                     printconfig);
                }
        } while (next_seid != 0);

        kfree(aq_buf);
        return ret;
}

/**
 * i40e_setup_pf_switch - Setup the HW switch on startup or after reset
 * @pf: board private structure
 * @reinit: if the Main VSI needs to re-initialized.
 * @lock_acquired: indicates whether or not the lock has been acquired
 *
 * Returns 0 on success, negative value on failure
 **/
static int i40e_setup_pf_switch(struct i40e_pf *pf, bool reinit, bool lock_acquired)
{
        struct i40e_vsi *main_vsi;
        u16 flags = 0;
        int ret;

        /* find out what's out there already */
        ret = i40e_fetch_switch_configuration(pf, false);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "couldn't fetch switch config, err %pe aq_err %s\n",
                         ERR_PTR(ret),
                         i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
                return ret;
        }
        i40e_pf_reset_stats(pf);

        /* set the switch config bit for the whole device to
         * support limited promisc or true promisc
         * when user requests promisc. The default is limited
         * promisc.
        */

        if ((pf->hw.pf_id == 0) &&
            !test_bit(I40E_FLAG_TRUE_PROMISC_ENA, pf->flags)) {
                flags = I40E_AQ_SET_SWITCH_CFG_PROMISC;
                pf->last_sw_conf_flags = flags;
        }

        if (pf->hw.pf_id == 0) {
                u16 valid_flags;

                valid_flags = I40E_AQ_SET_SWITCH_CFG_PROMISC;
                ret = i40e_aq_set_switch_config(&pf->hw, flags, valid_flags, 0,
                                                NULL);
                if (ret && pf->hw.aq.asq_last_status != I40E_AQ_RC_ESRCH) {
                        dev_info(&pf->pdev->dev,
                                 "couldn't set switch config bits, err %pe aq_err %s\n",
                                 ERR_PTR(ret),
                                 i40e_aq_str(&pf->hw,
                                             pf->hw.aq.asq_last_status));
                        /* not a fatal problem, just keep going */
                }
                pf->last_sw_conf_valid_flags = valid_flags;
        }

        /* first time setup */
        main_vsi = i40e_pf_get_main_vsi(pf);
        if (!main_vsi || reinit) {
                struct i40e_veb *veb;
                u16 uplink_seid;

                /* Set up the PF VSI associated with the PF's main VSI
                 * that is already in the HW switch
                 */
                veb = i40e_pf_get_main_veb(pf);
                if (veb)
                        uplink_seid = veb->seid;
                else
                        uplink_seid = pf->mac_seid;
                if (!main_vsi)
                        main_vsi = i40e_vsi_setup(pf, I40E_VSI_MAIN,
                                                  uplink_seid, 0);
                else if (reinit)
                        main_vsi = i40e_vsi_reinit_setup(main_vsi);
                if (!main_vsi) {
                        dev_info(&pf->pdev->dev, "setup of MAIN VSI failed\n");
                        i40e_cloud_filter_exit(pf);
                        i40e_fdir_teardown(pf);
                        return -EAGAIN;
                }
        } else {
                /* force a reset of TC and queue layout configurations */
                main_vsi->seid = pf->main_vsi_seid;
                i40e_vsi_reconfig_tc(main_vsi);
        }
        i40e_vlan_stripping_disable(main_vsi);

        i40e_fdir_sb_setup(pf);

        /* Setup static PF queue filter control settings */
        ret = i40e_setup_pf_filter_control(pf);
        if (ret) {
                dev_info(&pf->pdev->dev, "setup_pf_filter_control failed: %d\n",
                         ret);
                /* Failure here should not stop continuing other steps */
        }

        /* enable RSS in the HW, even for only one queue, as the stack can use
         * the hash
         */
        if (test_bit(I40E_FLAG_RSS_ENA, pf->flags))
                i40e_pf_config_rss(pf);

        /* fill in link information and enable LSE reporting */
        i40e_link_event(pf);

        i40e_ptp_init(pf);

        if (!lock_acquired)
                rtnl_lock();

        /* repopulate tunnel port filters */
        udp_tunnel_nic_reset_ntf(main_vsi->netdev);

        if (!lock_acquired)
                rtnl_unlock();

        return ret;
}

/**
 * i40e_determine_queue_usage - Work out queue distribution
 * @pf: board private structure
 **/
static void i40e_determine_queue_usage(struct i40e_pf *pf)
{
        int queues_left;
        int q_max;

        pf->num_lan_qps = 0;

        /* Find the max queues to be put into basic use.  We'll always be
         * using TC0, whether or not DCB is running, and TC0 will get the
         * big RSS set.
         */
        queues_left = pf->hw.func_caps.num_tx_qp;

        if ((queues_left == 1) ||
            !test_bit(I40E_FLAG_MSIX_ENA, pf->flags)) {
                /* one qp for PF, no queues for anything else */
                queues_left = 0;
                pf->alloc_rss_size = pf->num_lan_qps = 1;

                /* make sure all the fancies are disabled */
                clear_bit(I40E_FLAG_RSS_ENA, pf->flags);
                clear_bit(I40E_FLAG_IWARP_ENA, pf->flags);
                clear_bit(I40E_FLAG_FD_SB_ENA, pf->flags);
                clear_bit(I40E_FLAG_FD_ATR_ENA, pf->flags);
                clear_bit(I40E_FLAG_DCB_CAPABLE, pf->flags);
                clear_bit(I40E_FLAG_DCB_ENA, pf->flags);
                clear_bit(I40E_FLAG_SRIOV_ENA, pf->flags);
                clear_bit(I40E_FLAG_VMDQ_ENA, pf->flags);
                set_bit(I40E_FLAG_FD_SB_INACTIVE, pf->flags);
        } else if (!test_bit(I40E_FLAG_RSS_ENA, pf->flags) &&
                   !test_bit(I40E_FLAG_FD_SB_ENA, pf->flags) &&
                   !test_bit(I40E_FLAG_FD_ATR_ENA, pf->flags) &&
                   !test_bit(I40E_FLAG_DCB_CAPABLE, pf->flags)) {
                /* one qp for PF */
                pf->alloc_rss_size = pf->num_lan_qps = 1;
                queues_left -= pf->num_lan_qps;

                clear_bit(I40E_FLAG_RSS_ENA, pf->flags);
                clear_bit(I40E_FLAG_IWARP_ENA, pf->flags);
                clear_bit(I40E_FLAG_FD_SB_ENA, pf->flags);
                clear_bit(I40E_FLAG_FD_ATR_ENA, pf->flags);
                clear_bit(I40E_FLAG_DCB_ENA, pf->flags);
                clear_bit(I40E_FLAG_VMDQ_ENA, pf->flags);
                set_bit(I40E_FLAG_FD_SB_INACTIVE, pf->flags);
        } else {
                /* Not enough queues for all TCs */
                if (test_bit(I40E_FLAG_DCB_CAPABLE, pf->flags) &&
                    queues_left < I40E_MAX_TRAFFIC_CLASS) {
                        clear_bit(I40E_FLAG_DCB_CAPABLE, pf->flags);
                        clear_bit(I40E_FLAG_DCB_ENA, pf->flags);
                        dev_info(&pf->pdev->dev, "not enough queues for DCB. DCB is disabled.\n");
                }

                /* limit lan qps to the smaller of qps, cpus or msix */
                q_max = max_t(int, pf->rss_size_max, num_online_cpus());
                q_max = min_t(int, q_max, pf->hw.func_caps.num_tx_qp);
                q_max = min_t(int, q_max, pf->hw.func_caps.num_msix_vectors);
                pf->num_lan_qps = q_max;

                queues_left -= pf->num_lan_qps;
        }

        if (test_bit(I40E_FLAG_FD_SB_ENA, pf->flags)) {
                if (queues_left > 1) {
                        queues_left -= 1; /* save 1 queue for FD */
                } else {
                        clear_bit(I40E_FLAG_FD_SB_ENA, pf->flags);
                        set_bit(I40E_FLAG_FD_SB_INACTIVE, pf->flags);
                        dev_info(&pf->pdev->dev, "not enough queues for Flow Director. Flow Director feature is disabled\n");
                }
        }

        if (test_bit(I40E_FLAG_SRIOV_ENA, pf->flags) &&
            pf->num_vf_qps && pf->num_req_vfs && queues_left) {
                pf->num_req_vfs = min_t(int, pf->num_req_vfs,
                                        (queues_left / pf->num_vf_qps));
                queues_left -= (pf->num_req_vfs * pf->num_vf_qps);
        }

        if (test_bit(I40E_FLAG_VMDQ_ENA, pf->flags) &&
            pf->num_vmdq_vsis && pf->num_vmdq_qps && queues_left) {
                pf->num_vmdq_vsis = min_t(int, pf->num_vmdq_vsis,
                                          (queues_left / pf->num_vmdq_qps));
                queues_left -= (pf->num_vmdq_vsis * pf->num_vmdq_qps);
        }

        pf->queues_left = queues_left;
        dev_dbg(&pf->pdev->dev,
                "qs_avail=%d FD SB=%d lan_qs=%d lan_tc0=%d vf=%d*%d vmdq=%d*%d, remaining=%d\n",
                pf->hw.func_caps.num_tx_qp,
                !!test_bit(I40E_FLAG_FD_SB_ENA, pf->flags),
                pf->num_lan_qps, pf->alloc_rss_size, pf->num_req_vfs,
                pf->num_vf_qps, pf->num_vmdq_vsis, pf->num_vmdq_qps,
                queues_left);
}

/**
 * i40e_setup_pf_filter_control - Setup PF static filter control
 * @pf: PF to be setup
 *
 * i40e_setup_pf_filter_control sets up a PF's initial filter control
 * settings. If PE/FCoE are enabled then it will also set the per PF
 * based filter sizes required for them. It also enables Flow director,
 * ethertype and macvlan type filter settings for the pf.
 *
 * Returns 0 on success, negative on failure
 **/
static int i40e_setup_pf_filter_control(struct i40e_pf *pf)
{
        struct i40e_filter_control_settings *settings = &pf->filter_settings;

        settings->hash_lut_size = I40E_HASH_LUT_SIZE_128;

        /* Flow Director is enabled */
        if (test_bit(I40E_FLAG_FD_SB_ENA, pf->flags) ||
            test_bit(I40E_FLAG_FD_ATR_ENA, pf->flags))
                settings->enable_fdir = true;

        /* Ethtype and MACVLAN filters enabled for PF */
        settings->enable_ethtype = true;
        settings->enable_macvlan = true;

        if (i40e_set_filter_control(&pf->hw, settings))
                return -ENOENT;

        return 0;
}

#define INFO_STRING_LEN 255
#define REMAIN(__x) (INFO_STRING_LEN - (__x))
static void i40e_print_features(struct i40e_pf *pf)
{
        struct i40e_vsi *main_vsi = i40e_pf_get_main_vsi(pf);
        struct i40e_hw *hw = &pf->hw;
        char *buf;
        int i;

        buf = kmalloc(INFO_STRING_LEN, GFP_KERNEL);
        if (!buf)
                return;

        i = snprintf(buf, INFO_STRING_LEN, "Features: PF-id[%d]", hw->pf_id);
#ifdef CONFIG_PCI_IOV
        i += scnprintf(&buf[i], REMAIN(i), " VFs: %d", pf->num_req_vfs);
#endif
        i += scnprintf(&buf[i], REMAIN(i), " VSIs: %d QP: %d",
                       pf->hw.func_caps.num_vsis, main_vsi->num_queue_pairs);
        if (test_bit(I40E_FLAG_RSS_ENA, pf->flags))
                i += scnprintf(&buf[i], REMAIN(i), " RSS");
        if (test_bit(I40E_FLAG_FD_ATR_ENA, pf->flags))
                i += scnprintf(&buf[i], REMAIN(i), " FD_ATR");
        if (test_bit(I40E_FLAG_FD_SB_ENA, pf->flags)) {
                i += scnprintf(&buf[i], REMAIN(i), " FD_SB");
                i += scnprintf(&buf[i], REMAIN(i), " NTUPLE");
        }
        if (test_bit(I40E_FLAG_DCB_CAPABLE, pf->flags))
                i += scnprintf(&buf[i], REMAIN(i), " DCB");
        i += scnprintf(&buf[i], REMAIN(i), " VxLAN");
        i += scnprintf(&buf[i], REMAIN(i), " Geneve");
        if (test_bit(I40E_FLAG_PTP_ENA, pf->flags))
                i += scnprintf(&buf[i], REMAIN(i), " PTP");
        if (test_bit(I40E_FLAG_VEB_MODE_ENA, pf->flags))
                i += scnprintf(&buf[i], REMAIN(i), " VEB");
        else
                i += scnprintf(&buf[i], REMAIN(i), " VEPA");

        dev_info(&pf->pdev->dev, "%s\n", buf);
        kfree(buf);
        WARN_ON(i > INFO_STRING_LEN);
}

/**
 * i40e_get_platform_mac_addr - get platform-specific MAC address
 * @pdev: PCI device information struct
 * @pf: board private structure
 *
 * Look up the MAC address for the device. First we'll try
 * eth_platform_get_mac_address, which will check Open Firmware, or arch
 * specific fallback. Otherwise, we'll default to the stored value in
 * firmware.
 **/
static void i40e_get_platform_mac_addr(struct pci_dev *pdev, struct i40e_pf *pf)
{
        if (eth_platform_get_mac_address(&pdev->dev, pf->hw.mac.addr))
                i40e_get_mac_addr(&pf->hw, pf->hw.mac.addr);
}

/**
 * i40e_set_fec_in_flags - helper function for setting FEC options in flags
 * @fec_cfg: FEC option to set in flags
 * @flags: ptr to flags in which we set FEC option
 **/
void i40e_set_fec_in_flags(u8 fec_cfg, unsigned long *flags)
{
        if (fec_cfg & I40E_AQ_SET_FEC_AUTO) {
                set_bit(I40E_FLAG_RS_FEC, flags);
                set_bit(I40E_FLAG_BASE_R_FEC, flags);
        }
        if ((fec_cfg & I40E_AQ_SET_FEC_REQUEST_RS) ||
            (fec_cfg & I40E_AQ_SET_FEC_ABILITY_RS)) {
                set_bit(I40E_FLAG_RS_FEC, flags);
                clear_bit(I40E_FLAG_BASE_R_FEC, flags);
        }
        if ((fec_cfg & I40E_AQ_SET_FEC_REQUEST_KR) ||
            (fec_cfg & I40E_AQ_SET_FEC_ABILITY_KR)) {
                set_bit(I40E_FLAG_BASE_R_FEC, flags);
                clear_bit(I40E_FLAG_RS_FEC, flags);
        }
        if (fec_cfg == 0) {
                clear_bit(I40E_FLAG_RS_FEC, flags);
                clear_bit(I40E_FLAG_BASE_R_FEC, flags);
        }
}

/**
 * i40e_check_recovery_mode - check if we are running transition firmware
 * @pf: board private structure
 *
 * Check registers indicating the firmware runs in recovery mode. Sets the
 * appropriate driver state.
 *
 * Returns true if the recovery mode was detected, false otherwise
 **/
static bool i40e_check_recovery_mode(struct i40e_pf *pf)
{
        u32 val = rd32(&pf->hw, I40E_GL_FWSTS);

        if (val & I40E_GL_FWSTS_FWS1B_MASK) {
                dev_crit(&pf->pdev->dev, "Firmware recovery mode detected. Limiting functionality.\n");
                dev_crit(&pf->pdev->dev, "Refer to the Intel(R) Ethernet Adapters and Devices User Guide for details on firmware recovery mode.\n");
                set_bit(__I40E_RECOVERY_MODE, pf->state);

                return true;
        }
        if (test_bit(__I40E_RECOVERY_MODE, pf->state))
                dev_info(&pf->pdev->dev, "Please do Power-On Reset to initialize adapter in normal mode with full functionality.\n");

        return false;
}

/**
 * i40e_pf_loop_reset - perform reset in a loop.
 * @pf: board private structure
 *
 * This function is useful when a NIC is about to enter recovery mode.
 * When a NIC's internal data structures are corrupted the NIC's
 * firmware is going to enter recovery mode.
 * Right after a POR it takes about 7 minutes for firmware to enter
 * recovery mode. Until that time a NIC is in some kind of intermediate
 * state. After that time period the NIC almost surely enters
 * recovery mode. The only way for a driver to detect intermediate
 * state is to issue a series of pf-resets and check a return value.
 * If a PF reset returns success then the firmware could be in recovery
 * mode so the caller of this code needs to check for recovery mode
 * if this function returns success. There is a little chance that
 * firmware will hang in intermediate state forever.
 * Since waiting 7 minutes is quite a lot of time this function waits
 * 10 seconds and then gives up by returning an error.
 *
 * Return 0 on success, negative on failure.
 **/
static int i40e_pf_loop_reset(struct i40e_pf *pf)
{
        /* wait max 10 seconds for PF reset to succeed */
        const unsigned long time_end = jiffies + 10 * HZ;
        struct i40e_hw *hw = &pf->hw;
        int ret;

        ret = i40e_pf_reset(hw);
        while (ret != 0 && time_before(jiffies, time_end)) {
                usleep_range(10000, 20000);
                ret = i40e_pf_reset(hw);
        }

        if (ret == 0)
                pf->pfr_count++;
        else
                dev_info(&pf->pdev->dev, "PF reset failed: %d\n", ret);

        return ret;
}

/**
 * i40e_check_fw_empr - check if FW issued unexpected EMP Reset
 * @pf: board private structure
 *
 * Check FW registers to determine if FW issued unexpected EMP Reset.
 * Every time when unexpected EMP Reset occurs the FW increments
 * a counter of unexpected EMP Resets. When the counter reaches 10
 * the FW should enter the Recovery mode
 *
 * Returns true if FW issued unexpected EMP Reset
 **/
static bool i40e_check_fw_empr(struct i40e_pf *pf)
{
        const u32 fw_sts = rd32(&pf->hw, I40E_GL_FWSTS) &
                           I40E_GL_FWSTS_FWS1B_MASK;
        return (fw_sts > I40E_GL_FWSTS_FWS1B_EMPR_0) &&
               (fw_sts <= I40E_GL_FWSTS_FWS1B_EMPR_10);
}

/**
 * i40e_handle_resets - handle EMP resets and PF resets
 * @pf: board private structure
 *
 * Handle both EMP resets and PF resets and conclude whether there are
 * any issues regarding these resets. If there are any issues then
 * generate log entry.
 *
 * Return 0 if NIC is healthy or negative value when there are issues
 * with resets
 **/
static int i40e_handle_resets(struct i40e_pf *pf)
{
        const int pfr = i40e_pf_loop_reset(pf);
        const bool is_empr = i40e_check_fw_empr(pf);

        if (is_empr || pfr != 0)
                dev_crit(&pf->pdev->dev, "Entering recovery mode due to repeated FW resets. This may take several minutes. Refer to the Intel(R) Ethernet Adapters and Devices User Guide.\n");

        return is_empr ? -EIO : pfr;
}

/**
 * i40e_init_recovery_mode - initialize subsystems needed in recovery mode
 * @pf: board private structure
 * @hw: ptr to the hardware info
 *
 * This function does a minimal setup of all subsystems needed for running
 * recovery mode.
 *
 * Returns 0 on success, negative on failure
 **/
static int i40e_init_recovery_mode(struct i40e_pf *pf, struct i40e_hw *hw)
{
        struct i40e_vsi *vsi;
        int err;
        int v_idx;

        pci_set_drvdata(pf->pdev, pf);
        pci_save_state(pf->pdev);

        /* set up periodic task facility */
        timer_setup(&pf->service_timer, i40e_service_timer, 0);
        pf->service_timer_period = HZ;

        INIT_WORK(&pf->service_task, i40e_service_task);
        clear_bit(__I40E_SERVICE_SCHED, pf->state);

        err = i40e_init_interrupt_scheme(pf);
        if (err)
                goto err_switch_setup;

        /* The number of VSIs reported by the FW is the minimum guaranteed
         * to us; HW supports far more and we share the remaining pool with
         * the other PFs. We allocate space for more than the guarantee with
         * the understanding that we might not get them all later.
         */
        if (pf->hw.func_caps.num_vsis < I40E_MIN_VSI_ALLOC)
                pf->num_alloc_vsi = I40E_MIN_VSI_ALLOC;
        else
                pf->num_alloc_vsi = pf->hw.func_caps.num_vsis;

        /* Set up the vsi struct and our local tracking of the MAIN PF vsi. */
        pf->vsi = kcalloc(pf->num_alloc_vsi, sizeof(struct i40e_vsi *),
                          GFP_KERNEL);
        if (!pf->vsi) {
                err = -ENOMEM;
                goto err_switch_setup;
        }

        /* We allocate one VSI which is needed as absolute minimum
         * in order to register the netdev
         */
        v_idx = i40e_vsi_mem_alloc(pf, I40E_VSI_MAIN);
        if (v_idx < 0) {
                err = v_idx;
                goto err_switch_setup;
        }
        pf->lan_vsi = v_idx;
        vsi = pf->vsi[v_idx];
        if (!vsi) {
                err = -EFAULT;
                goto err_switch_setup;
        }
        vsi->alloc_queue_pairs = 1;
        err = i40e_config_netdev(vsi);
        if (err)
                goto err_switch_setup;
        err = register_netdev(vsi->netdev);
        if (err)
                goto err_switch_setup;
        vsi->netdev_registered = true;
        i40e_dbg_pf_init(pf);

        err = i40e_setup_misc_vector_for_recovery_mode(pf);
        if (err)
                goto err_switch_setup;

        /* tell the firmware that we're starting */
        i40e_send_version(pf);

        /* since everything's happy, start the service_task timer */
        mod_timer(&pf->service_timer,
                  round_jiffies(jiffies + pf->service_timer_period));

        return 0;

err_switch_setup:
        i40e_reset_interrupt_capability(pf);
        timer_shutdown_sync(&pf->service_timer);
        i40e_shutdown_adminq(hw);
        iounmap(hw->hw_addr);
        pci_release_mem_regions(pf->pdev);
        pci_disable_device(pf->pdev);
        i40e_free_pf(pf);

        return err;
}

/**
 * i40e_set_subsystem_device_id - set subsystem device id
 * @hw: pointer to the hardware info
 *
 * Set PCI subsystem device id either from a pci_dev structure or
 * a specific FW register.
 **/
static inline void i40e_set_subsystem_device_id(struct i40e_hw *hw)
{
        struct i40e_pf *pf = i40e_hw_to_pf(hw);

        hw->subsystem_device_id = pf->pdev->subsystem_device ?
                pf->pdev->subsystem_device :
                (ushort)(rd32(hw, I40E_PFPCI_SUBSYSID) & USHRT_MAX);
}

/**
 * i40e_probe - Device initialization routine
 * @pdev: PCI device information struct
 * @ent: entry in i40e_pci_tbl
 *
 * i40e_probe initializes a PF identified by a pci_dev structure.
 * The OS initialization, configuring of the PF private structure,
 * and a hardware reset occur.
 *
 * Returns 0 on success, negative on failure
 **/
static int i40e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
        struct i40e_aq_get_phy_abilities_resp abilities;
#ifdef CONFIG_I40E_DCB
        enum i40e_get_fw_lldp_status_resp lldp_status;
#endif /* CONFIG_I40E_DCB */
        struct i40e_vsi *vsi;
        struct i40e_pf *pf;
        struct i40e_hw *hw;
        u16 wol_nvm_bits;
        char nvm_ver[32];
        u16 link_status;
#ifdef CONFIG_I40E_DCB
        int status;
#endif /* CONFIG_I40E_DCB */
        int err;
        u32 val;

        err = pci_enable_device_mem(pdev);
        if (err)
                return err;

        /* set up for high or low dma */
        err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
        if (err) {
                dev_err(&pdev->dev,
                        "DMA configuration failed: 0x%x\n", err);
                goto err_dma;
        }

        /* set up pci connections */
        err = pci_request_mem_regions(pdev, i40e_driver_name);
        if (err) {
                dev_info(&pdev->dev,
                         "pci_request_selected_regions failed %d\n", err);
                goto err_pci_reg;
        }

        pci_set_master(pdev);

        /* Now that we have a PCI connection, we need to do the
         * low level device setup.  This is primarily setting up
         * the Admin Queue structures and then querying for the
         * device's current profile information.
         */
        pf = i40e_alloc_pf(&pdev->dev);
        if (!pf) {
                err = -ENOMEM;
                goto err_pf_alloc;
        }
        pf->next_vsi = 0;
        pf->pdev = pdev;
        set_bit(__I40E_DOWN, pf->state);

        hw = &pf->hw;

        pf->ioremap_len = min_t(int, pci_resource_len(pdev, 0),
                                I40E_MAX_CSR_SPACE);
        /* We believe that the highest register to read is
         * I40E_GLGEN_STAT_CLEAR, so we check if the BAR size
         * is not less than that before mapping to prevent a
         * kernel panic.
         */
        if (pf->ioremap_len < I40E_GLGEN_STAT_CLEAR) {
                dev_err(&pdev->dev, "Cannot map registers, bar size 0x%X too small, aborting\n",
                        pf->ioremap_len);
                err = -ENOMEM;
                goto err_ioremap;
        }
        hw->hw_addr = ioremap(pci_resource_start(pdev, 0), pf->ioremap_len);
        if (!hw->hw_addr) {
                err = -EIO;
                dev_info(&pdev->dev, "ioremap(0x%04x, 0x%04x) failed: 0x%x\n",
                         (unsigned int)pci_resource_start(pdev, 0),
                         pf->ioremap_len, err);
                goto err_ioremap;
        }
        hw->vendor_id = pdev->vendor;
        hw->device_id = pdev->device;
        pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
        hw->subsystem_vendor_id = pdev->subsystem_vendor;
        i40e_set_subsystem_device_id(hw);
        hw->bus.device = PCI_SLOT(pdev->devfn);
        hw->bus.func = PCI_FUNC(pdev->devfn);
        hw->bus.bus_id = pdev->bus->number;

        /* Select something other than the 802.1ad ethertype for the
         * switch to use internally and drop on ingress.
         */
        hw->switch_tag = 0xffff;
        hw->first_tag = ETH_P_8021AD;
        hw->second_tag = ETH_P_8021Q;

        INIT_LIST_HEAD(&pf->l3_flex_pit_list);
        INIT_LIST_HEAD(&pf->l4_flex_pit_list);
        INIT_LIST_HEAD(&pf->ddp_old_prof);

        /* set up the locks for the AQ, do this only once in probe
         * and destroy them only once in remove
         */
        mutex_init(&hw->aq.asq_mutex);
        mutex_init(&hw->aq.arq_mutex);

        pf->msg_enable = netif_msg_init(debug,
                                        NETIF_MSG_DRV |
                                        NETIF_MSG_PROBE |
                                        NETIF_MSG_LINK);
        if (debug < -1)
                pf->hw.debug_mask = debug;

        /* do a special CORER for clearing PXE mode once at init */
        if (hw->revision_id == 0 &&
            (rd32(hw, I40E_GLLAN_RCTL_0) & I40E_GLLAN_RCTL_0_PXE_MODE_MASK)) {
                wr32(hw, I40E_GLGEN_RTRIG, I40E_GLGEN_RTRIG_CORER_MASK);
                i40e_flush(hw);
                msleep(200);
                pf->corer_count++;

                i40e_clear_pxe_mode(hw);
        }

        /* Reset here to make sure all is clean and to define PF 'n' */
        i40e_clear_hw(hw);

        err = i40e_set_mac_type(hw);
        if (err) {
                dev_warn(&pdev->dev, "unidentified MAC or BLANK NVM: %d\n",
                         err);
                goto err_pf_reset;
        }

        err = i40e_handle_resets(pf);
        if (err)
                goto err_pf_reset;

        i40e_check_recovery_mode(pf);

        if (is_kdump_kernel()) {
                hw->aq.num_arq_entries = I40E_MIN_ARQ_LEN;
                hw->aq.num_asq_entries = I40E_MIN_ASQ_LEN;
        } else {
                hw->aq.num_arq_entries = I40E_AQ_LEN;
                hw->aq.num_asq_entries = I40E_AQ_LEN;
        }
        hw->aq.arq_buf_size = I40E_MAX_AQ_BUF_SIZE;
        hw->aq.asq_buf_size = I40E_MAX_AQ_BUF_SIZE;

        snprintf(pf->int_name, sizeof(pf->int_name) - 1,
                 "%s-%s:misc",
                 dev_driver_string(&pf->pdev->dev), dev_name(&pdev->dev));

        err = i40e_init_shared_code(hw);
        if (err) {
                dev_warn(&pdev->dev, "unidentified MAC or BLANK NVM: %d\n",
                         err);
                goto err_pf_reset;
        }

        /* set up a default setting for link flow control */
        pf->hw.fc.requested_mode = I40E_FC_NONE;

        err = i40e_init_adminq(hw);
        if (err) {
                if (err == -EIO)
                        dev_info(&pdev->dev,
                                 "The driver for the device stopped because the NVM image v%u.%u is newer than expected v%u.%u. You must install the most recent version of the network driver.\n",
                                 hw->aq.api_maj_ver,
                                 hw->aq.api_min_ver,
                                 I40E_FW_API_VERSION_MAJOR,
                                 I40E_FW_MINOR_VERSION(hw));
                else
                        dev_info(&pdev->dev,
                                 "The driver for the device stopped because the device firmware failed to init. Try updating your NVM image.\n");

                goto err_pf_reset;
        }
        i40e_get_oem_version(hw);
        i40e_get_pba_string(hw);

        /* provide nvm, fw, api versions, vendor:device id, subsys vendor:device id */
        i40e_nvm_version_str(hw, nvm_ver, sizeof(nvm_ver));
        dev_info(&pdev->dev, "fw %d.%d.%05d api %d.%d nvm %s [%04x:%04x] [%04x:%04x]\n",
                 hw->aq.fw_maj_ver, hw->aq.fw_min_ver, hw->aq.fw_build,
                 hw->aq.api_maj_ver, hw->aq.api_min_ver, nvm_ver,
                 hw->vendor_id, hw->device_id, hw->subsystem_vendor_id,
                 hw->subsystem_device_id);

        if (i40e_is_aq_api_ver_ge(hw, I40E_FW_API_VERSION_MAJOR,
                                  I40E_FW_MINOR_VERSION(hw) + 1))
                dev_dbg(&pdev->dev,
                        "The driver for the device detected a newer version of the NVM image v%u.%u than v%u.%u.\n",
                         hw->aq.api_maj_ver,
                         hw->aq.api_min_ver,
                         I40E_FW_API_VERSION_MAJOR,
                         I40E_FW_MINOR_VERSION(hw));
        else if (i40e_is_aq_api_ver_lt(hw, 1, 4))
                dev_info(&pdev->dev,
                         "The driver for the device detected an older version of the NVM image v%u.%u than expected v%u.%u. Please update the NVM image.\n",
                         hw->aq.api_maj_ver,
                         hw->aq.api_min_ver,
                         I40E_FW_API_VERSION_MAJOR,
                         I40E_FW_MINOR_VERSION(hw));

        i40e_verify_eeprom(pf);

        /* Rev 0 hardware was never productized */
        if (hw->revision_id < 1)
                dev_warn(&pdev->dev, "This device is a pre-production adapter/LOM. Please be aware there may be issues with your hardware. If you are experiencing problems please contact your Intel or hardware representative who provided you with this hardware.\n");

        i40e_clear_pxe_mode(hw);

        err = i40e_get_capabilities(pf, i40e_aqc_opc_list_func_capabilities);
        if (err)
                goto err_adminq_setup;

        err = i40e_sw_init(pf);
        if (err) {
                dev_info(&pdev->dev, "sw_init failed: %d\n", err);
                goto err_sw_init;
        }

        if (test_bit(__I40E_RECOVERY_MODE, pf->state))
                return i40e_init_recovery_mode(pf, hw);

        err = i40e_init_lan_hmc(hw, hw->func_caps.num_tx_qp,
                                hw->func_caps.num_rx_qp, 0, 0);
        if (err) {
                dev_info(&pdev->dev, "init_lan_hmc failed: %d\n", err);
                goto err_init_lan_hmc;
        }

        err = i40e_configure_lan_hmc(hw, I40E_HMC_MODEL_DIRECT_ONLY);
        if (err) {
                dev_info(&pdev->dev, "configure_lan_hmc failed: %d\n", err);
                err = -ENOENT;
                goto err_configure_lan_hmc;
        }

        /* Disable LLDP for NICs that have firmware versions lower than v4.3.
         * Ignore error return codes because if it was already disabled via
         * hardware settings this will fail
         */
        if (test_bit(I40E_HW_CAP_STOP_FW_LLDP, pf->hw.caps)) {
                dev_info(&pdev->dev, "Stopping firmware LLDP agent.\n");
                i40e_aq_stop_lldp(hw, true, false, NULL);
        }

        /* allow a platform config to override the HW addr */
        i40e_get_platform_mac_addr(pdev, pf);

        if (!is_valid_ether_addr(hw->mac.addr)) {
                dev_info(&pdev->dev, "invalid MAC address %pM\n", hw->mac.addr);
                err = -EIO;
                goto err_mac_addr;
        }
        dev_info(&pdev->dev, "MAC address: %pM\n", hw->mac.addr);
        ether_addr_copy(hw->mac.perm_addr, hw->mac.addr);
        i40e_get_port_mac_addr(hw, hw->mac.port_addr);
        if (is_valid_ether_addr(hw->mac.port_addr))
                set_bit(I40E_HW_CAP_PORT_ID_VALID, pf->hw.caps);

        i40e_ptp_alloc_pins(pf);
        pci_set_drvdata(pdev, pf);
        pci_save_state(pdev);

#ifdef CONFIG_I40E_DCB
        status = i40e_get_fw_lldp_status(&pf->hw, &lldp_status);
        (!status &&
         lldp_status == I40E_GET_FW_LLDP_STATUS_ENABLED) ?
                (clear_bit(I40E_FLAG_FW_LLDP_DIS, pf->flags)) :
                (set_bit(I40E_FLAG_FW_LLDP_DIS, pf->flags));
        dev_info(&pdev->dev,
                 test_bit(I40E_FLAG_FW_LLDP_DIS, pf->flags) ?
                        "FW LLDP is disabled\n" :
                        "FW LLDP is enabled\n");

        /* Enable FW to write default DCB config on link-up */
        i40e_aq_set_dcb_parameters(hw, true, NULL);

        err = i40e_init_pf_dcb(pf);
        if (err) {
                dev_info(&pdev->dev, "DCB init failed %d, disabled\n", err);
                clear_bit(I40E_FLAG_DCB_CAPABLE, pf->flags);
                clear_bit(I40E_FLAG_DCB_ENA, pf->flags);
                /* Continue without DCB enabled */
        }
#endif /* CONFIG_I40E_DCB */

        /* set up periodic task facility */
        timer_setup(&pf->service_timer, i40e_service_timer, 0);
        pf->service_timer_period = HZ;

        INIT_WORK(&pf->service_task, i40e_service_task);
        clear_bit(__I40E_SERVICE_SCHED, pf->state);

        /* NVM bit on means WoL disabled for the port */
        i40e_read_nvm_word(hw, I40E_SR_NVM_WAKE_ON_LAN, &wol_nvm_bits);
        if (BIT (hw->port) & wol_nvm_bits || hw->partition_id != 1)
                pf->wol_en = false;
        else
                pf->wol_en = true;
        device_set_wakeup_enable(&pf->pdev->dev, pf->wol_en);

        /* set up the main switch operations */
        i40e_determine_queue_usage(pf);
        err = i40e_init_interrupt_scheme(pf);
        if (err)
                goto err_switch_setup;

        /* Reduce Tx and Rx pairs for kdump
         * When MSI-X is enabled, it's not allowed to use more TC queue
         * pairs than MSI-X vectors (pf->num_lan_msix) exist. Thus
         * vsi->num_queue_pairs will be equal to pf->num_lan_msix, i.e., 1.
         */
        if (is_kdump_kernel())
                pf->num_lan_msix = 1;

        pf->udp_tunnel_nic.set_port = i40e_udp_tunnel_set_port;
        pf->udp_tunnel_nic.unset_port = i40e_udp_tunnel_unset_port;
        pf->udp_tunnel_nic.flags = UDP_TUNNEL_NIC_INFO_MAY_SLEEP;
        pf->udp_tunnel_nic.shared = &pf->udp_tunnel_shared;
        pf->udp_tunnel_nic.tables[0].n_entries = I40E_MAX_PF_UDP_OFFLOAD_PORTS;
        pf->udp_tunnel_nic.tables[0].tunnel_types = UDP_TUNNEL_TYPE_VXLAN |
                                                    UDP_TUNNEL_TYPE_GENEVE;

        /* The number of VSIs reported by the FW is the minimum guaranteed
         * to us; HW supports far more and we share the remaining pool with
         * the other PFs. We allocate space for more than the guarantee with
         * the understanding that we might not get them all later.
         */
        if (pf->hw.func_caps.num_vsis < I40E_MIN_VSI_ALLOC)
                pf->num_alloc_vsi = I40E_MIN_VSI_ALLOC;
        else
                pf->num_alloc_vsi = pf->hw.func_caps.num_vsis;
        if (pf->num_alloc_vsi > UDP_TUNNEL_NIC_MAX_SHARING_DEVICES) {
                dev_warn(&pf->pdev->dev,
                         "limiting the VSI count due to UDP tunnel limitation %d > %d\n",
                         pf->num_alloc_vsi, UDP_TUNNEL_NIC_MAX_SHARING_DEVICES);
                pf->num_alloc_vsi = UDP_TUNNEL_NIC_MAX_SHARING_DEVICES;
        }

        /* Set up the *vsi struct and our local tracking of the MAIN PF vsi. */
        pf->vsi = kcalloc(pf->num_alloc_vsi, sizeof(struct i40e_vsi *),
                          GFP_KERNEL);
        if (!pf->vsi) {
                err = -ENOMEM;
                goto err_switch_setup;
        }

#ifdef CONFIG_PCI_IOV
        /* prep for VF support */
        if (test_bit(I40E_FLAG_SRIOV_ENA, pf->flags) &&
            test_bit(I40E_FLAG_MSIX_ENA, pf->flags) &&
            !test_bit(__I40E_BAD_EEPROM, pf->state)) {
                if (pci_num_vf(pdev))
                        set_bit(I40E_FLAG_VEB_MODE_ENA, pf->flags);
        }
#endif
        err = i40e_setup_pf_switch(pf, false, false);
        if (err) {
                dev_info(&pdev->dev, "setup_pf_switch failed: %d\n", err);
                goto err_vsis;
        }

        vsi = i40e_pf_get_main_vsi(pf);
        INIT_LIST_HEAD(&vsi->ch_list);

        /* if FDIR VSI was set up, start it now */
        vsi = i40e_find_vsi_by_type(pf, I40E_VSI_FDIR);
        if (vsi)
                i40e_vsi_open(vsi);

        /* The driver only wants link up/down and module qualification
         * reports from firmware.  Note the negative logic.
         */
        err = i40e_aq_set_phy_int_mask(&pf->hw,
                                       ~(I40E_AQ_EVENT_LINK_UPDOWN |
                                         I40E_AQ_EVENT_MEDIA_NA |
                                         I40E_AQ_EVENT_MODULE_QUAL_FAIL), NULL);
        if (err)
                dev_info(&pf->pdev->dev, "set phy mask fail, err %pe aq_err %s\n",
                         ERR_PTR(err),
                         i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));

        /* Reconfigure hardware for allowing smaller MSS in the case
         * of TSO, so that we avoid the MDD being fired and causing
         * a reset in the case of small MSS+TSO.
         */
        val = rd32(hw, I40E_REG_MSS);
        if ((val & I40E_REG_MSS_MIN_MASK) > I40E_64BYTE_MSS) {
                val &= ~I40E_REG_MSS_MIN_MASK;
                val |= I40E_64BYTE_MSS;
                wr32(hw, I40E_REG_MSS, val);
        }

        if (test_bit(I40E_HW_CAP_RESTART_AUTONEG, pf->hw.caps)) {
                msleep(75);
                err = i40e_aq_set_link_restart_an(&pf->hw, true, NULL);
                if (err)
                        dev_info(&pf->pdev->dev, "link restart failed, err %pe aq_err %s\n",
                                 ERR_PTR(err),
                                 i40e_aq_str(&pf->hw,
                                             pf->hw.aq.asq_last_status));
        }
        /* The main driver is (mostly) up and happy. We need to set this state
         * before setting up the misc vector or we get a race and the vector
         * ends up disabled forever.
         */
        clear_bit(__I40E_DOWN, pf->state);

        /* In case of MSIX we are going to setup the misc vector right here
         * to handle admin queue events etc. In case of legacy and MSI
         * the misc functionality and queue processing is combined in
         * the same vector and that gets setup at open.
         */
        if (test_bit(I40E_FLAG_MSIX_ENA, pf->flags)) {
                err = i40e_setup_misc_vector(pf);
                if (err) {
                        dev_info(&pdev->dev,
                                 "setup of misc vector failed: %d\n", err);
                        i40e_cloud_filter_exit(pf);
                        i40e_fdir_teardown(pf);
                        goto err_vsis;
                }
        }

#ifdef CONFIG_PCI_IOV
        /* prep for VF support */
        if (test_bit(I40E_FLAG_SRIOV_ENA, pf->flags) &&
            test_bit(I40E_FLAG_MSIX_ENA, pf->flags) &&
            !test_bit(__I40E_BAD_EEPROM, pf->state)) {
                /* disable link interrupts for VFs */
                val = rd32(hw, I40E_PFGEN_PORTMDIO_NUM);
                val &= ~I40E_PFGEN_PORTMDIO_NUM_VFLINK_STAT_ENA_MASK;
                wr32(hw, I40E_PFGEN_PORTMDIO_NUM, val);
                i40e_flush(hw);

                if (pci_num_vf(pdev)) {
                        dev_info(&pdev->dev,
                                 "Active VFs found, allocating resources.\n");
                        err = i40e_alloc_vfs(pf, pci_num_vf(pdev));
                        if (err)
                                dev_info(&pdev->dev,
                                         "Error %d allocating resources for existing VFs\n",
                                         err);
                }
        }
#endif /* CONFIG_PCI_IOV */

        if (test_bit(I40E_FLAG_IWARP_ENA, pf->flags)) {
                pf->iwarp_base_vector = i40e_get_lump(pf, pf->irq_pile,
                                                      pf->num_iwarp_msix,
                                                      I40E_IWARP_IRQ_PILE_ID);
                if (pf->iwarp_base_vector < 0) {
                        dev_info(&pdev->dev,
                                 "failed to get tracking for %d vectors for IWARP err=%d\n",
                                 pf->num_iwarp_msix, pf->iwarp_base_vector);
                        clear_bit(I40E_FLAG_IWARP_ENA, pf->flags);
                }
        }

        i40e_dbg_pf_init(pf);

        /* tell the firmware that we're starting */
        i40e_send_version(pf);

        /* since everything's happy, start the service_task timer */
        mod_timer(&pf->service_timer,
                  round_jiffies(jiffies + pf->service_timer_period));

        /* add this PF to client device list and launch a client service task */
        if (test_bit(I40E_FLAG_IWARP_ENA, pf->flags)) {
                err = i40e_lan_add_device(pf);
                if (err)
                        dev_info(&pdev->dev, "Failed to add PF to client API service list: %d\n",
                                 err);
        }

#define PCI_SPEED_SIZE 8
#define PCI_WIDTH_SIZE 8
        /* Devices on the IOSF bus do not have this information
         * and will report PCI Gen 1 x 1 by default so don't bother
         * checking them.
         */
        if (!test_bit(I40E_HW_CAP_NO_PCI_LINK_CHECK, pf->hw.caps)) {
                char speed[PCI_SPEED_SIZE] = "Unknown";
                char width[PCI_WIDTH_SIZE] = "Unknown";

                /* Get the negotiated link width and speed from PCI config
                 * space
                 */
                pcie_capability_read_word(pf->pdev, PCI_EXP_LNKSTA,
                                          &link_status);

                i40e_set_pci_config_data(hw, link_status);

                switch (hw->bus.speed) {
                case i40e_bus_speed_8000:
                        strscpy(speed, "8.0", PCI_SPEED_SIZE); break;
                case i40e_bus_speed_5000:
                        strscpy(speed, "5.0", PCI_SPEED_SIZE); break;
                case i40e_bus_speed_2500:
                        strscpy(speed, "2.5", PCI_SPEED_SIZE); break;
                default:
                        break;
                }
                switch (hw->bus.width) {
                case i40e_bus_width_pcie_x8:
                        strscpy(width, "8", PCI_WIDTH_SIZE); break;
                case i40e_bus_width_pcie_x4:
                        strscpy(width, "4", PCI_WIDTH_SIZE); break;
                case i40e_bus_width_pcie_x2:
                        strscpy(width, "2", PCI_WIDTH_SIZE); break;
                case i40e_bus_width_pcie_x1:
                        strscpy(width, "1", PCI_WIDTH_SIZE); break;
                default:
                        break;
                }

                dev_info(&pdev->dev, "PCI-Express: Speed %sGT/s Width x%s\n",
                         speed, width);

                if (hw->bus.width < i40e_bus_width_pcie_x8 ||
                    hw->bus.speed < i40e_bus_speed_8000) {
                        dev_warn(&pdev->dev, "PCI-Express bandwidth available for this device may be insufficient for optimal performance.\n");
                        dev_warn(&pdev->dev, "Please move the device to a different PCI-e link with more lanes and/or higher transfer rate.\n");
                }
        }

        /* get the requested speeds from the fw */
        err = i40e_aq_get_phy_capabilities(hw, false, false, &abilities, NULL);
        if (err)
                dev_dbg(&pf->pdev->dev, "get requested speeds ret =  %pe last_status =  %s\n",
                        ERR_PTR(err),
                        i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
        pf->hw.phy.link_info.requested_speeds = abilities.link_speed;

        /* set the FEC config due to the board capabilities */
        i40e_set_fec_in_flags(abilities.fec_cfg_curr_mod_ext_info, pf->flags);

        /* get the supported phy types from the fw */
        err = i40e_aq_get_phy_capabilities(hw, false, true, &abilities, NULL);
        if (err)
                dev_dbg(&pf->pdev->dev, "get supported phy types ret =  %pe last_status =  %s\n",
                        ERR_PTR(err),
                        i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));

        /* make sure the MFS hasn't been set lower than the default */
#define MAX_FRAME_SIZE_DEFAULT 0x2600
        val = FIELD_GET(I40E_PRTGL_SAH_MFS_MASK,
                        rd32(&pf->hw, I40E_PRTGL_SAH));
        if (val < MAX_FRAME_SIZE_DEFAULT)
                dev_warn(&pdev->dev, "MFS for port %x (%d) has been set below the default (%d)\n",
                         pf->hw.port, val, MAX_FRAME_SIZE_DEFAULT);

        /* Add a filter to drop all Flow control frames from any VSI from being
         * transmitted. By doing so we stop a malicious VF from sending out
         * PAUSE or PFC frames and potentially controlling traffic for other
         * PF/VF VSIs.
         * The FW can still send Flow control frames if enabled.
         */
        i40e_add_filter_to_drop_tx_flow_control_frames(&pf->hw,
                                                       pf->main_vsi_seid);

        if ((pf->hw.device_id == I40E_DEV_ID_10G_BASE_T) ||
            (pf->hw.device_id == I40E_DEV_ID_10G_BASE_T4))
                set_bit(I40E_HW_CAP_PHY_CONTROLS_LEDS, pf->hw.caps);
        if (pf->hw.device_id == I40E_DEV_ID_SFP_I_X722)
                set_bit(I40E_HW_CAP_CRT_RETIMER, pf->hw.caps);
        /* print a string summarizing features */
        i40e_print_features(pf);

        i40e_devlink_register(pf);

        return 0;

        /* Unwind what we've done if something failed in the setup */
err_vsis:
        set_bit(__I40E_DOWN, pf->state);
        i40e_clear_interrupt_scheme(pf);
        kfree(pf->vsi);
err_switch_setup:
        i40e_reset_interrupt_capability(pf);
        timer_shutdown_sync(&pf->service_timer);
err_mac_addr:
err_configure_lan_hmc:
        (void)i40e_shutdown_lan_hmc(hw);
err_init_lan_hmc:
        kfree(pf->qp_pile);
err_sw_init:
err_adminq_setup:
err_pf_reset:
        iounmap(hw->hw_addr);
err_ioremap:
        i40e_free_pf(pf);
err_pf_alloc:
        pci_release_mem_regions(pdev);
err_pci_reg:
err_dma:
        pci_disable_device(pdev);
        return err;
}

/**
 * i40e_remove - Device removal routine
 * @pdev: PCI device information struct
 *
 * i40e_remove is called by the PCI subsystem to alert the driver
 * that is should release a PCI device.  This could be caused by a
 * Hot-Plug event, or because the driver is going to be removed from
 * memory.
 **/
static void i40e_remove(struct pci_dev *pdev)
{
        struct i40e_pf *pf = pci_get_drvdata(pdev);
        struct i40e_hw *hw = &pf->hw;
        struct i40e_vsi *vsi;
        struct i40e_veb *veb;
        int ret_code;
        int i;

        i40e_devlink_unregister(pf);

        i40e_dbg_pf_exit(pf);

        i40e_ptp_stop(pf);

        /* Disable RSS in hw */
        i40e_write_rx_ctl(hw, I40E_PFQF_HENA(0), 0);
        i40e_write_rx_ctl(hw, I40E_PFQF_HENA(1), 0);

        /* Grab __I40E_RESET_RECOVERY_PENDING and set __I40E_IN_REMOVE
         * flags, once they are set, i40e_rebuild should not be called as
         * i40e_prep_for_reset always returns early.
         */
        while (test_and_set_bit(__I40E_RESET_RECOVERY_PENDING, pf->state))
                usleep_range(1000, 2000);
        set_bit(__I40E_IN_REMOVE, pf->state);

        if (test_bit(I40E_FLAG_SRIOV_ENA, pf->flags)) {
                set_bit(__I40E_VF_RESETS_DISABLED, pf->state);
                i40e_free_vfs(pf);
                clear_bit(I40E_FLAG_SRIOV_ENA, pf->flags);
        }
        /* no more scheduling of any task */
        set_bit(__I40E_SUSPENDED, pf->state);
        set_bit(__I40E_DOWN, pf->state);
        if (pf->service_timer.function)
                timer_shutdown_sync(&pf->service_timer);
        if (pf->service_task.func)
                cancel_work_sync(&pf->service_task);

        if (test_bit(__I40E_RECOVERY_MODE, pf->state)) {
                struct i40e_vsi *vsi = pf->vsi[0];

                /* We know that we have allocated only one vsi for this PF,
                 * it was just for registering netdevice, so the interface
                 * could be visible in the 'ifconfig' output
                 */
                unregister_netdev(vsi->netdev);
                free_netdev(vsi->netdev);

                goto unmap;
        }

        /* Client close must be called explicitly here because the timer
         * has been stopped.
         */
        i40e_notify_client_of_netdev_close(pf, false);

        i40e_fdir_teardown(pf);

        /* If there is a switch structure or any orphans, remove them.
         * This will leave only the PF's VSI remaining.
         */
        i40e_pf_for_each_veb(pf, i, veb)
                if (veb->uplink_seid == pf->mac_seid ||
                    veb->uplink_seid == 0)
                        i40e_switch_branch_release(veb);

        /* Now we can shutdown the PF's VSIs, just before we kill
         * adminq and hmc.
         */
        i40e_pf_for_each_vsi(pf, i, vsi) {
                i40e_vsi_close(vsi);
                i40e_vsi_release(vsi);
                pf->vsi[i] = NULL;
        }

        i40e_cloud_filter_exit(pf);

        /* remove attached clients */
        if (test_bit(I40E_FLAG_IWARP_ENA, pf->flags)) {
                ret_code = i40e_lan_del_device(pf);
                if (ret_code)
                        dev_warn(&pdev->dev, "Failed to delete client device: %d\n",
                                 ret_code);
        }

        /* shutdown and destroy the HMC */
        if (hw->hmc.hmc_obj) {
                ret_code = i40e_shutdown_lan_hmc(hw);
                if (ret_code)
                        dev_warn(&pdev->dev,
                                 "Failed to destroy the HMC resources: %d\n",
                                 ret_code);
        }

unmap:
        /* Free MSI/legacy interrupt 0 when in recovery mode. */
        if (test_bit(__I40E_RECOVERY_MODE, pf->state) &&
            !test_bit(I40E_FLAG_MSIX_ENA, pf->flags))
                free_irq(pf->pdev->irq, pf);

        /* shutdown the adminq */
        i40e_shutdown_adminq(hw);

        /* destroy the locks only once, here */
        mutex_destroy(&hw->aq.arq_mutex);
        mutex_destroy(&hw->aq.asq_mutex);

        /* Clear all dynamic memory lists of rings, q_vectors, and VSIs */
        rtnl_lock();
        i40e_clear_interrupt_scheme(pf);
        i40e_pf_for_each_vsi(pf, i, vsi) {
                if (!test_bit(__I40E_RECOVERY_MODE, pf->state))
                        i40e_vsi_clear_rings(vsi);

                i40e_vsi_clear(vsi);
                pf->vsi[i] = NULL;
        }
        rtnl_unlock();

        i40e_pf_for_each_veb(pf, i, veb) {
                kfree(veb);
                pf->veb[i] = NULL;
        }

        kfree(pf->qp_pile);
        kfree(pf->vsi);

        iounmap(hw->hw_addr);
        i40e_free_pf(pf);
        pci_release_mem_regions(pdev);

        pci_disable_device(pdev);
}

/**
 * i40e_enable_mc_magic_wake - enable multicast magic packet wake up
 * using the mac_address_write admin q function
 * @pf: pointer to i40e_pf struct
 **/
static void i40e_enable_mc_magic_wake(struct i40e_pf *pf)
{
        struct i40e_vsi *main_vsi = i40e_pf_get_main_vsi(pf);
        struct i40e_hw *hw = &pf->hw;
        u8 mac_addr[6];
        u16 flags = 0;
        int ret;

        /* Get current MAC address in case it's an LAA */
        if (main_vsi && main_vsi->netdev) {
                ether_addr_copy(mac_addr, main_vsi->netdev->dev_addr);
        } else {
                dev_err(&pf->pdev->dev,
                        "Failed to retrieve MAC address; using default\n");
                ether_addr_copy(mac_addr, hw->mac.addr);
        }

        /* The FW expects the mac address write cmd to first be called with
         * one of these flags before calling it again with the multicast
         * enable flags.
         */
        flags = I40E_AQC_WRITE_TYPE_LAA_WOL;

        if (hw->func_caps.flex10_enable && hw->partition_id != 1)
                flags = I40E_AQC_WRITE_TYPE_LAA_ONLY;

        ret = i40e_aq_mac_address_write(hw, flags, mac_addr, NULL);
        if (ret) {
                dev_err(&pf->pdev->dev,
                        "Failed to update MAC address registers; cannot enable Multicast Magic packet wake up");
                return;
        }

        flags = I40E_AQC_MC_MAG_EN
                        | I40E_AQC_WOL_PRESERVE_ON_PFR
                        | I40E_AQC_WRITE_TYPE_UPDATE_MC_MAG;
        ret = i40e_aq_mac_address_write(hw, flags, mac_addr, NULL);
        if (ret)
                dev_err(&pf->pdev->dev,
                        "Failed to enable Multicast Magic Packet wake up\n");
}

/**
 * i40e_io_suspend - suspend all IO operations
 * @pf: pointer to i40e_pf struct
 *
 **/
static int i40e_io_suspend(struct i40e_pf *pf)
{
        struct i40e_hw *hw = &pf->hw;

        set_bit(__I40E_DOWN, pf->state);

        /* Ensure service task will not be running */
        del_timer_sync(&pf->service_timer);
        cancel_work_sync(&pf->service_task);

        /* Client close must be called explicitly here because the timer
         * has been stopped.
         */
        i40e_notify_client_of_netdev_close(pf, false);

        if (test_bit(I40E_HW_CAP_WOL_MC_MAGIC_PKT_WAKE, pf->hw.caps) &&
            pf->wol_en)
                i40e_enable_mc_magic_wake(pf);

        /* Since we're going to destroy queues during the
         * i40e_clear_interrupt_scheme() we should hold the RTNL lock for this
         * whole section
         */
        rtnl_lock();

        i40e_prep_for_reset(pf);

        wr32(hw, I40E_PFPM_APM, (pf->wol_en ? I40E_PFPM_APM_APME_MASK : 0));
        wr32(hw, I40E_PFPM_WUFC, (pf->wol_en ? I40E_PFPM_WUFC_MAG_MASK : 0));

        /* Clear the interrupt scheme and release our IRQs so that the system
         * can safely hibernate even when there are a large number of CPUs.
         * Otherwise hibernation might fail when mapping all the vectors back
         * to CPU0.
         */
        i40e_clear_interrupt_scheme(pf);

        rtnl_unlock();

        return 0;
}

/**
 * i40e_io_resume - resume IO operations
 * @pf: pointer to i40e_pf struct
 *
 **/
static int i40e_io_resume(struct i40e_pf *pf)
{
        struct device *dev = &pf->pdev->dev;
        int err;

        /* We need to hold the RTNL lock prior to restoring interrupt schemes,
         * since we're going to be restoring queues
         */
        rtnl_lock();

        /* We cleared the interrupt scheme when we suspended, so we need to
         * restore it now to resume device functionality.
         */
        err = i40e_restore_interrupt_scheme(pf);
        if (err) {
                dev_err(dev, "Cannot restore interrupt scheme: %d\n",
                        err);
        }

        clear_bit(__I40E_DOWN, pf->state);
        i40e_reset_and_rebuild(pf, false, true);

        rtnl_unlock();

        /* Clear suspended state last after everything is recovered */
        clear_bit(__I40E_SUSPENDED, pf->state);

        /* Restart the service task */
        mod_timer(&pf->service_timer,
                  round_jiffies(jiffies + pf->service_timer_period));

        return 0;
}

/**
 * i40e_pci_error_detected - warning that something funky happened in PCI land
 * @pdev: PCI device information struct
 * @error: the type of PCI error
 *
 * Called to warn that something happened and the error handling steps
 * are in progress.  Allows the driver to quiesce things, be ready for
 * remediation.
 **/
static pci_ers_result_t i40e_pci_error_detected(struct pci_dev *pdev,
                                                pci_channel_state_t error)
{
        struct i40e_pf *pf = pci_get_drvdata(pdev);

        dev_info(&pdev->dev, "%s: error %d\n", __func__, error);

        if (!pf) {
                dev_info(&pdev->dev,
                         "Cannot recover - error happened during device probe\n");
                return PCI_ERS_RESULT_DISCONNECT;
        }

        /* shutdown all operations */
        if (!test_bit(__I40E_SUSPENDED, pf->state))
                i40e_io_suspend(pf);

        /* Request a slot reset */
        return PCI_ERS_RESULT_NEED_RESET;
}

/**
 * i40e_pci_error_slot_reset - a PCI slot reset just happened
 * @pdev: PCI device information struct
 *
 * Called to find if the driver can work with the device now that
 * the pci slot has been reset.  If a basic connection seems good
 * (registers are readable and have sane content) then return a
 * happy little PCI_ERS_RESULT_xxx.
 **/
static pci_ers_result_t i40e_pci_error_slot_reset(struct pci_dev *pdev)
{
        struct i40e_pf *pf = pci_get_drvdata(pdev);
        pci_ers_result_t result;
        u32 reg;

        dev_dbg(&pdev->dev, "%s\n", __func__);
        /* enable I/O and memory of the device  */
        if (pci_enable_device(pdev)) {
                dev_info(&pdev->dev,
                         "Cannot re-enable PCI device after reset.\n");
                result = PCI_ERS_RESULT_DISCONNECT;
        } else {
                pci_set_master(pdev);
                pci_restore_state(pdev);
                pci_save_state(pdev);
                pci_wake_from_d3(pdev, false);

                reg = rd32(&pf->hw, I40E_GLGEN_RTRIG);
                if (reg == 0)
                        result = PCI_ERS_RESULT_RECOVERED;
                else
                        result = PCI_ERS_RESULT_DISCONNECT;
        }

        return result;
}

/**
 * i40e_pci_error_reset_prepare - prepare device driver for pci reset
 * @pdev: PCI device information struct
 */
static void i40e_pci_error_reset_prepare(struct pci_dev *pdev)
{
        struct i40e_pf *pf = pci_get_drvdata(pdev);

        i40e_prep_for_reset(pf);
}

/**
 * i40e_pci_error_reset_done - pci reset done, device driver reset can begin
 * @pdev: PCI device information struct
 */
static void i40e_pci_error_reset_done(struct pci_dev *pdev)
{
        struct i40e_pf *pf = pci_get_drvdata(pdev);

        if (test_bit(__I40E_IN_REMOVE, pf->state))
                return;

        i40e_reset_and_rebuild(pf, false, false);
#ifdef CONFIG_PCI_IOV
        i40e_restore_all_vfs_msi_state(pdev);
#endif /* CONFIG_PCI_IOV */
}

/**
 * i40e_pci_error_resume - restart operations after PCI error recovery
 * @pdev: PCI device information struct
 *
 * Called to allow the driver to bring things back up after PCI error
 * and/or reset recovery has finished.
 **/
static void i40e_pci_error_resume(struct pci_dev *pdev)
{
        struct i40e_pf *pf = pci_get_drvdata(pdev);

        dev_dbg(&pdev->dev, "%s\n", __func__);
        if (test_bit(__I40E_SUSPENDED, pf->state))
                return;

        i40e_io_resume(pf);
}

/**
 * i40e_shutdown - PCI callback for shutting down
 * @pdev: PCI device information struct
 **/
static void i40e_shutdown(struct pci_dev *pdev)
{
        struct i40e_pf *pf = pci_get_drvdata(pdev);
        struct i40e_hw *hw = &pf->hw;

        set_bit(__I40E_SUSPENDED, pf->state);
        set_bit(__I40E_DOWN, pf->state);

        del_timer_sync(&pf->service_timer);
        cancel_work_sync(&pf->service_task);
        i40e_cloud_filter_exit(pf);
        i40e_fdir_teardown(pf);

        /* Client close must be called explicitly here because the timer
         * has been stopped.
         */
        i40e_notify_client_of_netdev_close(pf, false);

        if (test_bit(I40E_HW_CAP_WOL_MC_MAGIC_PKT_WAKE, pf->hw.caps) &&
            pf->wol_en)
                i40e_enable_mc_magic_wake(pf);

        i40e_prep_for_reset(pf);

        wr32(hw, I40E_PFPM_APM,
             (pf->wol_en ? I40E_PFPM_APM_APME_MASK : 0));
        wr32(hw, I40E_PFPM_WUFC,
             (pf->wol_en ? I40E_PFPM_WUFC_MAG_MASK : 0));

        /* Free MSI/legacy interrupt 0 when in recovery mode. */
        if (test_bit(__I40E_RECOVERY_MODE, pf->state) &&
            !test_bit(I40E_FLAG_MSIX_ENA, pf->flags))
                free_irq(pf->pdev->irq, pf);

        /* Since we're going to destroy queues during the
         * i40e_clear_interrupt_scheme() we should hold the RTNL lock for this
         * whole section
         */
        rtnl_lock();
        i40e_clear_interrupt_scheme(pf);
        rtnl_unlock();

        if (system_state == SYSTEM_POWER_OFF) {
                pci_wake_from_d3(pdev, pf->wol_en);
                pci_set_power_state(pdev, PCI_D3hot);
        }
}

/**
 * i40e_suspend - PM callback for moving to D3
 * @dev: generic device information structure
 **/
static int i40e_suspend(struct device *dev)
{
        struct i40e_pf *pf = dev_get_drvdata(dev);

        /* If we're already suspended, then there is nothing to do */
        if (test_and_set_bit(__I40E_SUSPENDED, pf->state))
                return 0;
        return i40e_io_suspend(pf);
}

/**
 * i40e_resume - PM callback for waking up from D3
 * @dev: generic device information structure
 **/
static int i40e_resume(struct device *dev)
{
        struct i40e_pf *pf = dev_get_drvdata(dev);

        /* If we're not suspended, then there is nothing to do */
        if (!test_bit(__I40E_SUSPENDED, pf->state))
                return 0;
        return i40e_io_resume(pf);
}

static const struct pci_error_handlers i40e_err_handler = {
        .error_detected = i40e_pci_error_detected,
        .slot_reset = i40e_pci_error_slot_reset,
        .reset_prepare = i40e_pci_error_reset_prepare,
        .reset_done = i40e_pci_error_reset_done,
        .resume = i40e_pci_error_resume,
};

static DEFINE_SIMPLE_DEV_PM_OPS(i40e_pm_ops, i40e_suspend, i40e_resume);

static struct pci_driver i40e_driver = {
        .name     = i40e_driver_name,
        .id_table = i40e_pci_tbl,
        .probe    = i40e_probe,
        .remove   = i40e_remove,
        .driver.pm = pm_sleep_ptr(&i40e_pm_ops),
        .shutdown = i40e_shutdown,
        .err_handler = &i40e_err_handler,
        .sriov_configure = i40e_pci_sriov_configure,
};

/**
 * i40e_init_module - Driver registration routine
 *
 * i40e_init_module is the first routine called when the driver is
 * loaded. All it does is register with the PCI subsystem.
 **/
static int __init i40e_init_module(void)
{
        int err;

        pr_info("%s: %s\n", i40e_driver_name, i40e_driver_string);
        pr_info("%s: %s\n", i40e_driver_name, i40e_copyright);

        /* There is no need to throttle the number of active tasks because
         * each device limits its own task using a state bit for scheduling
         * the service task, and the device tasks do not interfere with each
         * other, so we don't set a max task limit. We must set WQ_MEM_RECLAIM
         * since we need to be able to guarantee forward progress even under
         * memory pressure.
         */
        i40e_wq = alloc_workqueue("%s", 0, 0, i40e_driver_name);
        if (!i40e_wq) {
                pr_err("%s: Failed to create workqueue\n", i40e_driver_name);
                return -ENOMEM;
        }

        i40e_dbg_init();
        err = pci_register_driver(&i40e_driver);
        if (err) {
                destroy_workqueue(i40e_wq);
                i40e_dbg_exit();
                return err;
        }

        return 0;
}
module_init(i40e_init_module);

/**
 * i40e_exit_module - Driver exit cleanup routine
 *
 * i40e_exit_module is called just before the driver is removed
 * from memory.
 **/
static void __exit i40e_exit_module(void)
{
        pci_unregister_driver(&i40e_driver);
        destroy_workqueue(i40e_wq);
        ida_destroy(&i40e_client_ida);
        i40e_dbg_exit();
}
module_exit(i40e_exit_module);