treewide: remove redundant IS_ERR() before error code check

[linux/fpc-iii.git] / drivers / net / ethernet / qlogic / qede / qede.h

/* QLogic qede NIC Driver
 * Copyright (c) 2015-2017  QLogic Corporation
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and /or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
#ifndef _QEDE_H_
#define _QEDE_H_
#include <linux/compiler.h>
#include <linux/version.h>
#include <linux/workqueue.h>
#include <linux/netdevice.h>
#include <linux/interrupt.h>
#include <linux/bitmap.h>
#include <linux/kernel.h>
#include <linux/mutex.h>
#include <linux/bpf.h>
#include <net/xdp.h>
#include <linux/qed/qede_rdma.h>
#include <linux/io.h>
#ifdef CONFIG_RFS_ACCEL
#include <linux/cpu_rmap.h>
#endif
#include <linux/qed/common_hsi.h>
#include <linux/qed/eth_common.h>
#include <linux/qed/qed_if.h>
#include <linux/qed/qed_chain.h>
#include <linux/qed/qed_eth_if.h>

#include <net/pkt_cls.h>
#include <net/tc_act/tc_gact.h>

#define QEDE_MAJOR_VERSION              8
#define QEDE_MINOR_VERSION              37
#define QEDE_REVISION_VERSION           0
#define QEDE_ENGINEERING_VERSION        20
#define DRV_MODULE_VERSION __stringify(QEDE_MAJOR_VERSION) "."  \
                __stringify(QEDE_MINOR_VERSION) "."             \
                __stringify(QEDE_REVISION_VERSION) "."          \
                __stringify(QEDE_ENGINEERING_VERSION)

#define DRV_MODULE_SYM          qede

struct qede_stats_common {
        u64 no_buff_discards;
        u64 packet_too_big_discard;
        u64 ttl0_discard;
        u64 rx_ucast_bytes;
        u64 rx_mcast_bytes;
        u64 rx_bcast_bytes;
        u64 rx_ucast_pkts;
        u64 rx_mcast_pkts;
        u64 rx_bcast_pkts;
        u64 mftag_filter_discards;
        u64 mac_filter_discards;
        u64 gft_filter_drop;
        u64 tx_ucast_bytes;
        u64 tx_mcast_bytes;
        u64 tx_bcast_bytes;
        u64 tx_ucast_pkts;
        u64 tx_mcast_pkts;
        u64 tx_bcast_pkts;
        u64 tx_err_drop_pkts;
        u64 coalesced_pkts;
        u64 coalesced_events;
        u64 coalesced_aborts_num;
        u64 non_coalesced_pkts;
        u64 coalesced_bytes;
        u64 link_change_count;
        u64 ptp_skip_txts;

        /* port */
        u64 rx_64_byte_packets;
        u64 rx_65_to_127_byte_packets;
        u64 rx_128_to_255_byte_packets;
        u64 rx_256_to_511_byte_packets;
        u64 rx_512_to_1023_byte_packets;
        u64 rx_1024_to_1518_byte_packets;
        u64 rx_crc_errors;
        u64 rx_mac_crtl_frames;
        u64 rx_pause_frames;
        u64 rx_pfc_frames;
        u64 rx_align_errors;
        u64 rx_carrier_errors;
        u64 rx_oversize_packets;
        u64 rx_jabbers;
        u64 rx_undersize_packets;
        u64 rx_fragments;
        u64 tx_64_byte_packets;
        u64 tx_65_to_127_byte_packets;
        u64 tx_128_to_255_byte_packets;
        u64 tx_256_to_511_byte_packets;
        u64 tx_512_to_1023_byte_packets;
        u64 tx_1024_to_1518_byte_packets;
        u64 tx_pause_frames;
        u64 tx_pfc_frames;
        u64 brb_truncates;
        u64 brb_discards;
        u64 tx_mac_ctrl_frames;
};

struct qede_stats_bb {
        u64 rx_1519_to_1522_byte_packets;
        u64 rx_1519_to_2047_byte_packets;
        u64 rx_2048_to_4095_byte_packets;
        u64 rx_4096_to_9216_byte_packets;
        u64 rx_9217_to_16383_byte_packets;
        u64 tx_1519_to_2047_byte_packets;
        u64 tx_2048_to_4095_byte_packets;
        u64 tx_4096_to_9216_byte_packets;
        u64 tx_9217_to_16383_byte_packets;
        u64 tx_lpi_entry_count;
        u64 tx_total_collisions;
};

struct qede_stats_ah {
        u64 rx_1519_to_max_byte_packets;
        u64 tx_1519_to_max_byte_packets;
};

struct qede_stats {
        struct qede_stats_common common;

        union {
                struct qede_stats_bb bb;
                struct qede_stats_ah ah;
        };
};

struct qede_vlan {
        struct list_head list;
        u16 vid;
        bool configured;
};

struct qede_rdma_dev {
        struct qedr_dev *qedr_dev;
        struct list_head entry;
        struct list_head rdma_event_list;
        struct workqueue_struct *rdma_wq;
        bool exp_recovery;
};

struct qede_ptp;

#define QEDE_RFS_MAX_FLTR       256

enum qede_flags_bit {
        QEDE_FLAGS_IS_VF = 0,
        QEDE_FLAGS_LINK_REQUESTED,
        QEDE_FLAGS_PTP_TX_IN_PRORGESS,
        QEDE_FLAGS_TX_TIMESTAMPING_EN
};

#define QEDE_DUMP_MAX_ARGS 4
enum qede_dump_cmd {
        QEDE_DUMP_CMD_NONE = 0,
        QEDE_DUMP_CMD_NVM_CFG,
        QEDE_DUMP_CMD_GRCDUMP,
        QEDE_DUMP_CMD_MAX
};

struct qede_dump_info {
        enum qede_dump_cmd cmd;
        u8 num_args;
        u32 args[QEDE_DUMP_MAX_ARGS];
};

struct qede_dev {
        struct qed_dev                  *cdev;
        struct net_device               *ndev;
        struct pci_dev                  *pdev;

        u32                             dp_module;
        u8                              dp_level;

        unsigned long flags;
#define IS_VF(edev)     (test_bit(QEDE_FLAGS_IS_VF, &(edev)->flags))

        const struct qed_eth_ops        *ops;
        struct qede_ptp                 *ptp;
        u64                             ptp_skip_txts;

        struct qed_dev_eth_info dev_info;
#define QEDE_MAX_RSS_CNT(edev)  ((edev)->dev_info.num_queues)
#define QEDE_MAX_TSS_CNT(edev)  ((edev)->dev_info.num_queues)
#define QEDE_IS_BB(edev) \
        ((edev)->dev_info.common.dev_type == QED_DEV_TYPE_BB)
#define QEDE_IS_AH(edev) \
        ((edev)->dev_info.common.dev_type == QED_DEV_TYPE_AH)

        struct qede_fastpath            *fp_array;
        u8                              req_num_tx;
        u8                              fp_num_tx;
        u8                              req_num_rx;
        u8                              fp_num_rx;
        u16                             req_queues;
        u16                             num_queues;
#define QEDE_QUEUE_CNT(edev)    ((edev)->num_queues)
#define QEDE_RSS_COUNT(edev)    ((edev)->num_queues - (edev)->fp_num_tx)
#define QEDE_RX_QUEUE_IDX(edev, i)      (i)
#define QEDE_TSS_COUNT(edev)    ((edev)->num_queues - (edev)->fp_num_rx)

        struct qed_int_info             int_info;

        /* Smaller private varaiant of the RTNL lock */
        struct mutex                    qede_lock;
        u32                             state; /* Protected by qede_lock */
        u16                             rx_buf_size;
        u32                             rx_copybreak;

        /* L2 header size + 2*VLANs (8 bytes) + LLC SNAP (8 bytes) */
#define ETH_OVERHEAD                    (ETH_HLEN + 8 + 8)
        /* Max supported alignment is 256 (8 shift)
         * minimal alignment shift 6 is optimal for 57xxx HW performance
         */
#define QEDE_RX_ALIGN_SHIFT             max(6, min(8, L1_CACHE_SHIFT))
        /* We assume skb_build() uses sizeof(struct skb_shared_info) bytes
         * at the end of skb->data, to avoid wasting a full cache line.
         * This reduces memory use (skb->truesize).
         */
#define QEDE_FW_RX_ALIGN_END                                    \
        max_t(u64, 1UL << QEDE_RX_ALIGN_SHIFT,                  \
              SKB_DATA_ALIGN(sizeof(struct skb_shared_info)))

        struct qede_stats               stats;
#define QEDE_RSS_INDIR_INITED   BIT(0)
#define QEDE_RSS_KEY_INITED     BIT(1)
#define QEDE_RSS_CAPS_INITED    BIT(2)
        u32 rss_params_inited; /* bit-field to track initialized rss params */
        u16 rss_ind_table[128];
        u32 rss_key[10];
        u8 rss_caps;

        u16                     q_num_rx_buffers; /* Must be a power of two */
        u16                     q_num_tx_buffers; /* Must be a power of two */

        bool gro_disable;
        struct list_head vlan_list;
        u16 configured_vlans;
        u16 non_configured_vlans;
        bool accept_any_vlan;
        struct delayed_work             sp_task;
        unsigned long                   sp_flags;
        u16                             vxlan_dst_port;
        u16                             geneve_dst_port;

        struct qede_arfs                *arfs;
        bool                            wol_enabled;

        struct qede_rdma_dev            rdma_info;

        struct bpf_prog *xdp_prog;
        struct qede_dump_info           dump_info;
};

enum QEDE_STATE {
        QEDE_STATE_CLOSED,
        QEDE_STATE_OPEN,
        QEDE_STATE_RECOVERY,
};

#define HILO_U64(hi, lo)                ((((u64)(hi)) << 32) + (lo))

#define MAX_NUM_TC      8
#define MAX_NUM_PRI     8

/* The driver supports the new build_skb() API:
 * RX ring buffer contains pointer to kmalloc() data only,
 * skb are built only after the frame was DMA-ed.
 */
struct sw_rx_data {
        struct page *data;
        dma_addr_t mapping;
        unsigned int page_offset;
};

enum qede_agg_state {
        QEDE_AGG_STATE_NONE  = 0,
        QEDE_AGG_STATE_START = 1,
        QEDE_AGG_STATE_ERROR = 2
};

struct qede_agg_info {
        /* rx_buf is a data buffer that can be placed / consumed from rx bd
         * chain. It has two purposes: We will preallocate the data buffer
         * for each aggregation when we open the interface and will place this
         * buffer on the rx-bd-ring when we receive TPA_START. We don't want
         * to be in a state where allocation fails, as we can't reuse the
         * consumer buffer in the rx-chain since FW may still be writing to it
         * (since header needs to be modified for TPA).
         * The second purpose is to keep a pointer to the bd buffer during
         * aggregation.
         */
        struct sw_rx_data buffer;
        struct sk_buff *skb;

        /* We need some structs from the start cookie until termination */
        u16 vlan_tag;

        bool tpa_start_fail;
        u8 state;
        u8 frag_id;

        u8 tunnel_type;
};

struct qede_rx_queue {
        __le16 *hw_cons_ptr;
        void __iomem *hw_rxq_prod_addr;

        /* Required for the allocation of replacement buffers */
        struct device *dev;

        struct bpf_prog *xdp_prog;

        u16 sw_rx_cons;
        u16 sw_rx_prod;

        u16 filled_buffers;
        u8 data_direction;
        u8 rxq_id;

        /* Used once per each NAPI run */
        u16 num_rx_buffers;

        u16 rx_headroom;

        u32 rx_buf_size;
        u32 rx_buf_seg_size;

        struct sw_rx_data *sw_rx_ring;
        struct qed_chain rx_bd_ring;
        struct qed_chain rx_comp_ring ____cacheline_aligned;

        /* GRO */
        struct qede_agg_info tpa_info[ETH_TPA_MAX_AGGS_NUM];

        /* Used once per each NAPI run */
        u64 rcv_pkts;

        u64 rx_hw_errors;
        u64 rx_alloc_errors;
        u64 rx_ip_frags;

        u64 xdp_no_pass;

        void *handle;
        struct xdp_rxq_info xdp_rxq;
};

union db_prod {
        struct eth_db_data data;
        u32             raw;
};

struct sw_tx_bd {
        struct sk_buff *skb;
        u8 flags;
/* Set on the first BD descriptor when there is a split BD */
#define QEDE_TSO_SPLIT_BD               BIT(0)
};

struct sw_tx_xdp {
        struct page *page;
        dma_addr_t mapping;
};

struct qede_tx_queue {
        u8 is_xdp;
        bool is_legacy;
        u16 sw_tx_cons;
        u16 sw_tx_prod;
        u16 num_tx_buffers; /* Slowpath only */

        u64 xmit_pkts;
        u64 stopped_cnt;
        u64 tx_mem_alloc_err;

        __le16 *hw_cons_ptr;

        /* Needed for the mapping of packets */
        struct device *dev;

        void __iomem *doorbell_addr;
        union db_prod tx_db;
        int index; /* Slowpath only */
#define QEDE_TXQ_XDP_TO_IDX(edev, txq)  ((txq)->index - \
                                         QEDE_MAX_TSS_CNT(edev))
#define QEDE_TXQ_IDX_TO_XDP(edev, idx)  ((idx) + QEDE_MAX_TSS_CNT(edev))
#define QEDE_NDEV_TXQ_ID_TO_FP_ID(edev, idx)    ((edev)->fp_num_rx + \
                                                 ((idx) % QEDE_TSS_COUNT(edev)))
#define QEDE_NDEV_TXQ_ID_TO_TXQ_COS(edev, idx)  ((idx) / QEDE_TSS_COUNT(edev))
#define QEDE_TXQ_TO_NDEV_TXQ_ID(edev, txq)      ((QEDE_TSS_COUNT(edev) * \
                                                 (txq)->cos) + (txq)->index)
#define QEDE_NDEV_TXQ_ID_TO_TXQ(edev, idx)      \
        (&((edev)->fp_array[QEDE_NDEV_TXQ_ID_TO_FP_ID(edev, idx)].txq \
        [QEDE_NDEV_TXQ_ID_TO_TXQ_COS(edev, idx)]))
#define QEDE_FP_TC0_TXQ(fp)     (&((fp)->txq[0]))

        /* Regular Tx requires skb + metadata for release purpose,
         * while XDP requires the pages and the mapped address.
         */
        union {
                struct sw_tx_bd *skbs;
                struct sw_tx_xdp *xdp;
        } sw_tx_ring;

        struct qed_chain tx_pbl;

        /* Slowpath; Should be kept in end [unless missing padding] */
        void *handle;
        u16 cos;
        u16 ndev_txq_id;
};

#define BD_UNMAP_ADDR(bd)               HILO_U64(le32_to_cpu((bd)->addr.hi), \
                                                 le32_to_cpu((bd)->addr.lo))
#define BD_SET_UNMAP_ADDR_LEN(bd, maddr, len)                           \
        do {                                                            \
                (bd)->addr.hi = cpu_to_le32(upper_32_bits(maddr));      \
                (bd)->addr.lo = cpu_to_le32(lower_32_bits(maddr));      \
                (bd)->nbytes = cpu_to_le16(len);                        \
        } while (0)
#define BD_UNMAP_LEN(bd)                (le16_to_cpu((bd)->nbytes))

struct qede_fastpath {
        struct qede_dev *edev;
#define QEDE_FASTPATH_TX        BIT(0)
#define QEDE_FASTPATH_RX        BIT(1)
#define QEDE_FASTPATH_XDP       BIT(2)
#define QEDE_FASTPATH_COMBINED  (QEDE_FASTPATH_TX | QEDE_FASTPATH_RX)
        u8                      type;
        u8                      id;
        u8                      xdp_xmit;
        struct napi_struct      napi;
        struct qed_sb_info      *sb_info;
        struct qede_rx_queue    *rxq;
        struct qede_tx_queue    *txq;
        struct qede_tx_queue    *xdp_tx;

#define VEC_NAME_SIZE  (sizeof_field(struct net_device, name) + 8)
        char    name[VEC_NAME_SIZE];
};

/* Debug print definitions */
#define DP_NAME(edev) ((edev)->ndev->name)

#define XMIT_PLAIN              0
#define XMIT_L4_CSUM            BIT(0)
#define XMIT_LSO                BIT(1)
#define XMIT_ENC                BIT(2)
#define XMIT_ENC_GSO_L4_CSUM    BIT(3)

#define QEDE_CSUM_ERROR                 BIT(0)
#define QEDE_CSUM_UNNECESSARY           BIT(1)
#define QEDE_TUNN_CSUM_UNNECESSARY      BIT(2)

#define QEDE_SP_RECOVERY                0
#define QEDE_SP_RX_MODE                 1

#ifdef CONFIG_RFS_ACCEL
int qede_rx_flow_steer(struct net_device *dev, const struct sk_buff *skb,
                       u16 rxq_index, u32 flow_id);
#define QEDE_SP_ARFS_CONFIG     4
#define QEDE_SP_TASK_POLL_DELAY (5 * HZ)
#endif

void qede_process_arfs_filters(struct qede_dev *edev, bool free_fltr);
void qede_poll_for_freeing_arfs_filters(struct qede_dev *edev);
void qede_arfs_filter_op(void *dev, void *filter, u8 fw_rc);
void qede_free_arfs(struct qede_dev *edev);
int qede_alloc_arfs(struct qede_dev *edev);
int qede_add_cls_rule(struct qede_dev *edev, struct ethtool_rxnfc *info);
int qede_delete_flow_filter(struct qede_dev *edev, u64 cookie);
int qede_get_cls_rule_entry(struct qede_dev *edev, struct ethtool_rxnfc *cmd);
int qede_get_cls_rule_all(struct qede_dev *edev, struct ethtool_rxnfc *info,
                          u32 *rule_locs);
int qede_get_arfs_filter_count(struct qede_dev *edev);

struct qede_reload_args {
        void (*func)(struct qede_dev *edev, struct qede_reload_args *args);
        union {
                netdev_features_t features;
                struct bpf_prog *new_prog;
                u16 mtu;
        } u;
};

/* Datapath functions definition */
netdev_tx_t qede_start_xmit(struct sk_buff *skb, struct net_device *ndev);
u16 qede_select_queue(struct net_device *dev, struct sk_buff *skb,
                      struct net_device *sb_dev);
netdev_features_t qede_features_check(struct sk_buff *skb,
                                      struct net_device *dev,
                                      netdev_features_t features);
void qede_tx_log_print(struct qede_dev *edev, struct qede_fastpath *fp);
int qede_alloc_rx_buffer(struct qede_rx_queue *rxq, bool allow_lazy);
int qede_free_tx_pkt(struct qede_dev *edev,
                     struct qede_tx_queue *txq, int *len);
int qede_poll(struct napi_struct *napi, int budget);
irqreturn_t qede_msix_fp_int(int irq, void *fp_cookie);

/* Filtering function definitions */
void qede_force_mac(void *dev, u8 *mac, bool forced);
void qede_udp_ports_update(void *dev, u16 vxlan_port, u16 geneve_port);
int qede_set_mac_addr(struct net_device *ndev, void *p);

int qede_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid);
int qede_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid);
void qede_vlan_mark_nonconfigured(struct qede_dev *edev);
int qede_configure_vlan_filters(struct qede_dev *edev);

netdev_features_t qede_fix_features(struct net_device *dev,
                                    netdev_features_t features);
int qede_set_features(struct net_device *dev, netdev_features_t features);
void qede_set_rx_mode(struct net_device *ndev);
void qede_config_rx_mode(struct net_device *ndev);
void qede_fill_rss_params(struct qede_dev *edev,
                          struct qed_update_vport_rss_params *rss, u8 *update);

void qede_udp_tunnel_add(struct net_device *dev, struct udp_tunnel_info *ti);
void qede_udp_tunnel_del(struct net_device *dev, struct udp_tunnel_info *ti);

int qede_xdp(struct net_device *dev, struct netdev_bpf *xdp);

#ifdef CONFIG_DCB
void qede_set_dcbnl_ops(struct net_device *ndev);
#endif

void qede_config_debug(uint debug, u32 *p_dp_module, u8 *p_dp_level);
void qede_set_ethtool_ops(struct net_device *netdev);
void qede_reload(struct qede_dev *edev,
                 struct qede_reload_args *args, bool is_locked);
int qede_change_mtu(struct net_device *dev, int new_mtu);
void qede_fill_by_demand_stats(struct qede_dev *edev);
void __qede_lock(struct qede_dev *edev);
void __qede_unlock(struct qede_dev *edev);
bool qede_has_rx_work(struct qede_rx_queue *rxq);
int qede_txq_has_work(struct qede_tx_queue *txq);
void qede_recycle_rx_bd_ring(struct qede_rx_queue *rxq, u8 count);
void qede_update_rx_prod(struct qede_dev *edev, struct qede_rx_queue *rxq);
int qede_add_tc_flower_fltr(struct qede_dev *edev, __be16 proto,
                            struct flow_cls_offload *f);

#define RX_RING_SIZE_POW        13
#define RX_RING_SIZE            ((u16)BIT(RX_RING_SIZE_POW))
#define NUM_RX_BDS_MAX          (RX_RING_SIZE - 1)
#define NUM_RX_BDS_MIN          128
#define NUM_RX_BDS_DEF          ((u16)BIT(10) - 1)

#define TX_RING_SIZE_POW        13
#define TX_RING_SIZE            ((u16)BIT(TX_RING_SIZE_POW))
#define NUM_TX_BDS_MAX          (TX_RING_SIZE - 1)
#define NUM_TX_BDS_MIN          128
#define NUM_TX_BDS_DEF          NUM_TX_BDS_MAX

#define QEDE_MIN_PKT_LEN                64
#define QEDE_RX_HDR_SIZE                256
#define QEDE_MAX_JUMBO_PACKET_SIZE      9600
#define for_each_queue(i) for (i = 0; i < edev->num_queues; i++)
#define for_each_cos_in_txq(edev, var) \
        for ((var) = 0; (var) < (edev)->dev_info.num_tc; (var)++)

#endif /* _QEDE_H_ */