drivers/net/ethernet/intel/i40evf/i40evf.h

   1 /*******************************************************************************
   2  *
   3  * Intel Ethernet Controller XL710 Family Linux Virtual Function Driver
   4  * Copyright(c) 2013 - 2014 Intel Corporation.
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms and conditions of the GNU General Public License,
   8  * version 2, as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  * The full GNU General Public License is included in this distribution in
  19  * the file called "COPYING".
  20  *
  21  * Contact Information:
  22  * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  23  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  24  *
  25  ******************************************************************************/
  26
  27 #ifndef _I40EVF_H_
  28 #define _I40EVF_H_
  29
  30 #include <linux/module.h>
  31 #include <linux/pci.h>
  32 #include <linux/aer.h>
  33 #include <linux/netdevice.h>
  34 #include <linux/vmalloc.h>
  35 #include <linux/interrupt.h>
  36 #include <linux/ethtool.h>
  37 #include <linux/if_vlan.h>
  38 #include <linux/ip.h>
  39 #include <linux/tcp.h>
  40 #include <linux/sctp.h>
  41 #include <linux/ipv6.h>
  42 #include <net/ip6_checksum.h>
  43 #include <net/udp.h>
  44
  45 #include "i40e_type.h"
  46 #include "i40e_virtchnl.h"
  47 #include "i40e_txrx.h"
  48
  49 #define DEFAULT_DEBUG_LEVEL_SHIFT 3
  50 #define PFX "i40evf: "
  51 #define DPRINTK(nlevel, klevel, fmt, args...) \
  52         ((void)((NETIF_MSG_##nlevel & adapter->msg_enable) && \
  53         printk(KERN_##klevel PFX "%s: %s: " fmt, adapter->netdev->name, \
  54                 __func__ , ## args)))
  55
  56 /* dummy struct to make common code less painful */
  57 struct i40e_vsi {
  58         struct i40evf_adapter *back;
  59         struct net_device *netdev;
  60         unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
  61         u16 seid;
  62         u16 id;
  63         unsigned long state;
  64         int base_vector;
  65         u16 work_limit;
  66         /* high bit set means dynamic, use accessor routines to read/write.
  67          * hardware only supports 2us resolution for the ITR registers.
  68          * these values always store the USER setting, and must be converted
  69          * before programming to a register.
  70          */
  71         u16 rx_itr_setting;
  72         u16 tx_itr_setting;
  73 };
  74
  75 /* How many Rx Buffers do we bundle into one write to the hardware ? */
  76 #define I40EVF_RX_BUFFER_WRITE  16      /* Must be power of 2 */
  77 #define I40EVF_DEFAULT_TXD   512
  78 #define I40EVF_DEFAULT_RXD   512
  79 #define I40EVF_MAX_TXD       4096
  80 #define I40EVF_MIN_TXD       64
  81 #define I40EVF_MAX_RXD       4096
  82 #define I40EVF_MIN_RXD       64
  83 #define I40EVF_REQ_DESCRIPTOR_MULTIPLE  32
  84
  85 /* Supported Rx Buffer Sizes */
  86 #define I40EVF_RXBUFFER_64    64     /* Used for packet split */
  87 #define I40EVF_RXBUFFER_128   128    /* Used for packet split */
  88 #define I40EVF_RXBUFFER_256   256    /* Used for packet split */
  89 #define I40EVF_RXBUFFER_2048  2048
  90 #define I40EVF_MAX_RXBUFFER   16384  /* largest size for single descriptor */
  91 #define I40EVF_MAX_AQ_BUF_SIZE    4096
  92 #define I40EVF_AQ_LEN             32
  93 #define I40EVF_AQ_MAX_ERR         10 /* times to try before resetting AQ */
  94
  95 #define MAXIMUM_ETHERNET_VLAN_SIZE (VLAN_ETH_FRAME_LEN + ETH_FCS_LEN)
  96
  97 #define I40E_RX_DESC(R, i) (&(((union i40e_32byte_rx_desc *)((R)->desc))[i]))
  98 #define I40E_TX_DESC(R, i) (&(((struct i40e_tx_desc *)((R)->desc))[i]))
  99 #define I40E_TX_CTXTDESC(R, i) \
 100         (&(((struct i40e_tx_context_desc *)((R)->desc))[i]))
 101 #define MAX_RX_QUEUES 8
 102 #define MAX_TX_QUEUES MAX_RX_QUEUES
 103
 104 /* MAX_MSIX_Q_VECTORS of these are allocated,
 105  * but we only use one per queue-specific vector.
 106  */
 107 struct i40e_q_vector {
 108         struct i40evf_adapter *adapter;
 109         struct i40e_vsi *vsi;
 110         struct napi_struct napi;
 111         unsigned long reg_idx;
 112         struct i40e_ring_container rx;
 113         struct i40e_ring_container tx;
 114         u32 ring_mask;
 115         u8 num_ringpairs;       /* total number of ring pairs in vector */
 116         int v_idx;        /* vector index in list */
 117         char name[IFNAMSIZ + 9];
 118         cpumask_var_t affinity_mask;
 119 };
 120
 121 /* Helper macros to switch between ints/sec and what the register uses.
 122  * And yes, it's the same math going both ways.  The lowest value
 123  * supported by all of the i40e hardware is 8.
 124  */
 125 #define EITR_INTS_PER_SEC_TO_REG(_eitr) \
 126         ((_eitr) ? (1000000000 / ((_eitr) * 256)) : 8)
 127 #define EITR_REG_TO_INTS_PER_SEC EITR_INTS_PER_SEC_TO_REG
 128
 129 #define I40EVF_DESC_UNUSED(R) \
 130         ((((R)->next_to_clean > (R)->next_to_use) ? 0 : (R)->count) + \
 131         (R)->next_to_clean - (R)->next_to_use - 1)
 132
 133 #define I40EVF_RX_DESC_ADV(R, i)            \
 134         (&(((union i40e_adv_rx_desc *)((R).desc))[i]))
 135 #define I40EVF_TX_DESC_ADV(R, i)            \
 136         (&(((union i40e_adv_tx_desc *)((R).desc))[i]))
 137 #define I40EVF_TX_CTXTDESC_ADV(R, i)        \
 138         (&(((struct i40e_adv_tx_context_desc *)((R).desc))[i]))
 139
 140 #define OTHER_VECTOR 1
 141 #define NONQ_VECS (OTHER_VECTOR)
 142
 143 #define MAX_MSIX_Q_VECTORS 4
 144 #define MAX_MSIX_COUNT 5
 145
 146 #define MIN_MSIX_Q_VECTORS 1
 147 #define MIN_MSIX_COUNT (MIN_MSIX_Q_VECTORS + NONQ_VECS)
 148
 149 #define I40EVF_QUEUE_END_OF_LIST 0x7FF
 150 #define I40EVF_FREE_VECTOR 0x7FFF
 151 struct i40evf_mac_filter {
 152         struct list_head list;
 153         u8 macaddr[ETH_ALEN];
 154         bool remove;            /* filter needs to be removed */
 155         bool add;               /* filter needs to be added */
 156 };
 157
 158 struct i40evf_vlan_filter {
 159         struct list_head list;
 160         u16 vlan;
 161         bool remove;            /* filter needs to be removed */
 162         bool add;               /* filter needs to be added */
 163 };
 164
 165 /* Driver state. The order of these is important! */
 166 enum i40evf_state_t {
 167         __I40EVF_STARTUP,               /* driver loaded, probe complete */
 168         __I40EVF_REMOVE,                /* driver is being unloaded */
 169         __I40EVF_INIT_VERSION_CHECK,    /* aq msg sent, awaiting reply */
 170         __I40EVF_INIT_GET_RESOURCES,    /* aq msg sent, awaiting reply */
 171         __I40EVF_INIT_SW,               /* got resources, setting up structs */
 172         __I40EVF_RESETTING,             /* in reset */
 173         /* Below here, watchdog is running */
 174         __I40EVF_DOWN,                  /* ready, can be opened */
 175         __I40EVF_TESTING,               /* in ethtool self-test */
 176         __I40EVF_RUNNING,               /* opened, working */
 177 };
 178
 179 enum i40evf_critical_section_t {
 180         __I40EVF_IN_CRITICAL_TASK,      /* cannot be interrupted */
 181 };
 182 /* make common code happy */
 183 #define __I40E_DOWN __I40EVF_DOWN
 184
 185 /* board specific private data structure */
 186 struct i40evf_adapter {
 187         struct timer_list watchdog_timer;
 188         struct work_struct reset_task;
 189         struct work_struct adminq_task;
 190         struct delayed_work init_task;
 191         struct i40e_q_vector *q_vector[MAX_MSIX_Q_VECTORS];
 192         struct list_head vlan_filter_list;
 193         char misc_vector_name[IFNAMSIZ + 9];
 194         int num_active_queues;
 195
 196         /* TX */
 197         struct i40e_ring *tx_rings[I40E_MAX_VSI_QP];
 198         u32 tx_timeout_count;
 199         struct list_head mac_filter_list;
 200         u32 tx_desc_count;
 201
 202         /* RX */
 203         struct i40e_ring *rx_rings[I40E_MAX_VSI_QP];
 204         u64 hw_csum_rx_error;
 205         u32 rx_desc_count;
 206         int num_msix_vectors;
 207         struct msix_entry *msix_entries;
 208
 209         u32 flags;
 210 #define I40EVF_FLAG_RX_CSUM_ENABLED              (u32)(1)
 211 #define I40EVF_FLAG_RX_1BUF_CAPABLE              (u32)(1 << 1)
 212 #define I40EVF_FLAG_RX_PS_CAPABLE                (u32)(1 << 2)
 213 #define I40EVF_FLAG_RX_PS_ENABLED                (u32)(1 << 3)
 214 #define I40EVF_FLAG_IN_NETPOLL                   (u32)(1 << 4)
 215 #define I40EVF_FLAG_IMIR_ENABLED                 (u32)(1 << 5)
 216 #define I40EVF_FLAG_MQ_CAPABLE                   (u32)(1 << 6)
 217 #define I40EVF_FLAG_NEED_LINK_UPDATE             (u32)(1 << 7)
 218 #define I40EVF_FLAG_PF_COMMS_FAILED              (u32)(1 << 8)
 219 #define I40EVF_FLAG_RESET_PENDING                (u32)(1 << 9)
 220 #define I40EVF_FLAG_RESET_NEEDED                 (u32)(1 << 10)
 221 /* duplcates for common code */
 222 #define I40E_FLAG_FDIR_ATR_ENABLED               0
 223 #define I40E_FLAG_DCB_ENABLED                    0
 224 #define I40E_FLAG_IN_NETPOLL                     I40EVF_FLAG_IN_NETPOLL
 225 #define I40E_FLAG_RX_CSUM_ENABLED                I40EVF_FLAG_RX_CSUM_ENABLED
 226         /* flags for admin queue service task */
 227         u32 aq_required;
 228         u32 aq_pending;
 229 #define I40EVF_FLAG_AQ_ENABLE_QUEUES            (u32)(1)
 230 #define I40EVF_FLAG_AQ_DISABLE_QUEUES           (u32)(1 << 1)
 231 #define I40EVF_FLAG_AQ_ADD_MAC_FILTER           (u32)(1 << 2)
 232 #define I40EVF_FLAG_AQ_ADD_VLAN_FILTER          (u32)(1 << 3)
 233 #define I40EVF_FLAG_AQ_DEL_MAC_FILTER           (u32)(1 << 4)
 234 #define I40EVF_FLAG_AQ_DEL_VLAN_FILTER          (u32)(1 << 5)
 235 #define I40EVF_FLAG_AQ_CONFIGURE_QUEUES         (u32)(1 << 6)
 236 #define I40EVF_FLAG_AQ_MAP_VECTORS              (u32)(1 << 7)
 237 #define I40EVF_FLAG_AQ_HANDLE_RESET             (u32)(1 << 8)
 238
 239         /* OS defined structs */
 240         struct net_device *netdev;
 241         struct pci_dev *pdev;
 242         struct net_device_stats net_stats;
 243
 244         struct i40e_hw hw; /* defined in i40e_type.h */
 245
 246         enum i40evf_state_t state;
 247         unsigned long crit_section;
 248
 249         struct work_struct watchdog_task;
 250         bool netdev_registered;
 251         bool link_up;
 252         enum i40e_virtchnl_ops current_op;
 253         struct i40e_virtchnl_vf_resource *vf_res; /* incl. all VSIs */
 254         struct i40e_virtchnl_vsi_resource *vsi_res; /* our LAN VSI */
 255         u16 msg_enable;
 256         struct i40e_eth_stats current_stats;
 257         struct i40e_vsi vsi;
 258         u32 aq_wait_count;
 259 };
 260
 261
 262 /* needed by i40evf_ethtool.c */
 263 extern char i40evf_driver_name[];
 264 extern const char i40evf_driver_version[];
 265
 266 int i40evf_up(struct i40evf_adapter *adapter);
 267 void i40evf_down(struct i40evf_adapter *adapter);
 268 void i40evf_reinit_locked(struct i40evf_adapter *adapter);
 269 void i40evf_reset(struct i40evf_adapter *adapter);
 270 void i40evf_set_ethtool_ops(struct net_device *netdev);
 271 void i40evf_update_stats(struct i40evf_adapter *adapter);
 272 void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter);
 273 int i40evf_init_interrupt_scheme(struct i40evf_adapter *adapter);
 274 void i40evf_irq_enable_queues(struct i40evf_adapter *adapter, u32 mask);
 275
 276 void i40e_napi_add_all(struct i40evf_adapter *adapter);
 277 void i40e_napi_del_all(struct i40evf_adapter *adapter);
 278
 279 int i40evf_send_api_ver(struct i40evf_adapter *adapter);
 280 int i40evf_verify_api_ver(struct i40evf_adapter *adapter);
 281 int i40evf_send_vf_config_msg(struct i40evf_adapter *adapter);
 282 int i40evf_get_vf_config(struct i40evf_adapter *adapter);
 283 void i40evf_irq_enable(struct i40evf_adapter *adapter, bool flush);
 284 void i40evf_configure_queues(struct i40evf_adapter *adapter);
 285 void i40evf_deconfigure_queues(struct i40evf_adapter *adapter);
 286 void i40evf_enable_queues(struct i40evf_adapter *adapter);
 287 void i40evf_disable_queues(struct i40evf_adapter *adapter);
 288 void i40evf_map_queues(struct i40evf_adapter *adapter);
 289 void i40evf_add_ether_addrs(struct i40evf_adapter *adapter);
 290 void i40evf_del_ether_addrs(struct i40evf_adapter *adapter);
 291 void i40evf_add_vlans(struct i40evf_adapter *adapter);
 292 void i40evf_del_vlans(struct i40evf_adapter *adapter);
 293 void i40evf_set_promiscuous(struct i40evf_adapter *adapter, int flags);
 294 void i40evf_request_stats(struct i40evf_adapter *adapter);
 295 void i40evf_request_reset(struct i40evf_adapter *adapter);
 296 void i40evf_virtchnl_completion(struct i40evf_adapter *adapter,
 297                                 enum i40e_virtchnl_ops v_opcode,
 298                                 i40e_status v_retval, u8 *msg, u16 msglen);
 299 #endif /* _I40EVF_H_ */