drivers/net/ethernet/intel/ixgbevf/ixgbevf.h

   1 /*******************************************************************************
   2
   3   Intel 82599 Virtual Function driver
   4   Copyright(c) 1999 - 2015 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 with
  16   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 _IXGBEVF_H_
  28 #define _IXGBEVF_H_
  29
  30 #include <linux/types.h>
  31 #include <linux/bitops.h>
  32 #include <linux/timer.h>
  33 #include <linux/io.h>
  34 #include <linux/netdevice.h>
  35 #include <linux/if_vlan.h>
  36 #include <linux/u64_stats_sync.h>
  37
  38 #include "vf.h"
  39
  40 #ifdef CONFIG_NET_RX_BUSY_POLL
  41 #include <net/busy_poll.h>
  42 #define BP_EXTENDED_STATS
  43 #endif
  44
  45 #define IXGBE_MAX_TXD_PWR       14
  46 #define IXGBE_MAX_DATA_PER_TXD  BIT(IXGBE_MAX_TXD_PWR)
  47
  48 /* Tx Descriptors needed, worst case */
  49 #define TXD_USE_COUNT(S) DIV_ROUND_UP((S), IXGBE_MAX_DATA_PER_TXD)
  50 #define DESC_NEEDED (MAX_SKB_FRAGS + 4)
  51
  52 /* wrapper around a pointer to a socket buffer,
  53  * so a DMA handle can be stored along with the buffer
  54  */
  55 struct ixgbevf_tx_buffer {
  56         union ixgbe_adv_tx_desc *next_to_watch;
  57         unsigned long time_stamp;
  58         struct sk_buff *skb;
  59         unsigned int bytecount;
  60         unsigned short gso_segs;
  61         __be16 protocol;
  62         DEFINE_DMA_UNMAP_ADDR(dma);
  63         DEFINE_DMA_UNMAP_LEN(len);
  64         u32 tx_flags;
  65 };
  66
  67 struct ixgbevf_rx_buffer {
  68         dma_addr_t dma;
  69         struct page *page;
  70         unsigned int page_offset;
  71 };
  72
  73 struct ixgbevf_stats {
  74         u64 packets;
  75         u64 bytes;
  76 #ifdef BP_EXTENDED_STATS
  77         u64 yields;
  78         u64 misses;
  79         u64 cleaned;
  80 #endif
  81 };
  82
  83 struct ixgbevf_tx_queue_stats {
  84         u64 restart_queue;
  85         u64 tx_busy;
  86         u64 tx_done_old;
  87 };
  88
  89 struct ixgbevf_rx_queue_stats {
  90         u64 alloc_rx_page_failed;
  91         u64 alloc_rx_buff_failed;
  92         u64 csum_err;
  93 };
  94
  95 enum ixgbevf_ring_state_t {
  96         __IXGBEVF_TX_DETECT_HANG,
  97         __IXGBEVF_HANG_CHECK_ARMED,
  98 };
  99
 100 #define check_for_tx_hang(ring) \
 101         test_bit(__IXGBEVF_TX_DETECT_HANG, &(ring)->state)
 102 #define set_check_for_tx_hang(ring) \
 103         set_bit(__IXGBEVF_TX_DETECT_HANG, &(ring)->state)
 104 #define clear_check_for_tx_hang(ring) \
 105         clear_bit(__IXGBEVF_TX_DETECT_HANG, &(ring)->state)
 106
 107 struct ixgbevf_ring {
 108         struct ixgbevf_ring *next;
 109         struct net_device *netdev;
 110         struct device *dev;
 111         void *desc;                     /* descriptor ring memory */
 112         dma_addr_t dma;                 /* phys. address of descriptor ring */
 113         unsigned int size;              /* length in bytes */
 114         u16 count;                      /* amount of descriptors */
 115         u16 next_to_use;
 116         u16 next_to_clean;
 117         u16 next_to_alloc;
 118
 119         union {
 120                 struct ixgbevf_tx_buffer *tx_buffer_info;
 121                 struct ixgbevf_rx_buffer *rx_buffer_info;
 122         };
 123         unsigned long state;
 124         struct ixgbevf_stats stats;
 125         struct u64_stats_sync syncp;
 126         union {
 127                 struct ixgbevf_tx_queue_stats tx_stats;
 128                 struct ixgbevf_rx_queue_stats rx_stats;
 129         };
 130
 131         u64 hw_csum_rx_error;
 132         u8 __iomem *tail;
 133         struct sk_buff *skb;
 134
 135         /* holds the special value that gets the hardware register offset
 136          * associated with this ring, which is different for DCB and RSS modes
 137          */
 138         u16 reg_idx;
 139         int queue_index; /* needed for multiqueue queue management */
 140 };
 141
 142 /* How many Rx Buffers do we bundle into one write to the hardware ? */
 143 #define IXGBEVF_RX_BUFFER_WRITE 16      /* Must be power of 2 */
 144
 145 #define MAX_RX_QUEUES IXGBE_VF_MAX_RX_QUEUES
 146 #define MAX_TX_QUEUES IXGBE_VF_MAX_TX_QUEUES
 147 #define IXGBEVF_MAX_RSS_QUEUES          2
 148 #define IXGBEVF_82599_RETA_SIZE         128     /* 128 entries */
 149 #define IXGBEVF_X550_VFRETA_SIZE        64      /* 64 entries */
 150 #define IXGBEVF_RSS_HASH_KEY_SIZE       40
 151 #define IXGBEVF_VFRSSRK_REGS            10      /* 10 registers for RSS key */
 152
 153 #define IXGBEVF_DEFAULT_TXD     1024
 154 #define IXGBEVF_DEFAULT_RXD     512
 155 #define IXGBEVF_MAX_TXD         4096
 156 #define IXGBEVF_MIN_TXD         64
 157 #define IXGBEVF_MAX_RXD         4096
 158 #define IXGBEVF_MIN_RXD         64
 159
 160 /* Supported Rx Buffer Sizes */
 161 #define IXGBEVF_RXBUFFER_256    256    /* Used for packet split */
 162 #define IXGBEVF_RXBUFFER_2048   2048
 163
 164 #define IXGBEVF_RX_HDR_SIZE     IXGBEVF_RXBUFFER_256
 165 #define IXGBEVF_RX_BUFSZ        IXGBEVF_RXBUFFER_2048
 166
 167 #define MAXIMUM_ETHERNET_VLAN_SIZE (VLAN_ETH_FRAME_LEN + ETH_FCS_LEN)
 168
 169 #define IXGBE_TX_FLAGS_CSUM             (u32)(1)
 170 #define IXGBE_TX_FLAGS_VLAN             (u32)(1 << 1)
 171 #define IXGBE_TX_FLAGS_TSO              (u32)(1 << 2)
 172 #define IXGBE_TX_FLAGS_IPV4             (u32)(1 << 3)
 173 #define IXGBE_TX_FLAGS_VLAN_MASK        0xffff0000
 174 #define IXGBE_TX_FLAGS_VLAN_PRIO_MASK   0x0000e000
 175 #define IXGBE_TX_FLAGS_VLAN_SHIFT       16
 176
 177 struct ixgbevf_ring_container {
 178         struct ixgbevf_ring *ring;      /* pointer to linked list of rings */
 179         unsigned int total_bytes;       /* total bytes processed this int */
 180         unsigned int total_packets;     /* total packets processed this int */
 181         u8 count;                       /* total number of rings in vector */
 182         u8 itr;                         /* current ITR setting for ring */
 183 };
 184
 185 /* iterator for handling rings in ring container */
 186 #define ixgbevf_for_each_ring(pos, head) \
 187         for (pos = (head).ring; pos != NULL; pos = pos->next)
 188
 189 /* MAX_MSIX_Q_VECTORS of these are allocated,
 190  * but we only use one per queue-specific vector.
 191  */
 192 struct ixgbevf_q_vector {
 193         struct ixgbevf_adapter *adapter;
 194         /* index of q_vector within array, also used for finding the bit in
 195          * EICR and friends that represents the vector for this ring
 196          */
 197         u16 v_idx;
 198         u16 itr; /* Interrupt throttle rate written to EITR */
 199         struct napi_struct napi;
 200         struct ixgbevf_ring_container rx, tx;
 201         char name[IFNAMSIZ + 9];
 202 #ifdef CONFIG_NET_RX_BUSY_POLL
 203         unsigned int state;
 204 #define IXGBEVF_QV_STATE_IDLE           0
 205 #define IXGBEVF_QV_STATE_NAPI           1    /* NAPI owns this QV */
 206 #define IXGBEVF_QV_STATE_POLL           2    /* poll owns this QV */
 207 #define IXGBEVF_QV_STATE_DISABLED       4    /* QV is disabled */
 208 #define IXGBEVF_QV_OWNED        (IXGBEVF_QV_STATE_NAPI | IXGBEVF_QV_STATE_POLL)
 209 #define IXGBEVF_QV_LOCKED       (IXGBEVF_QV_OWNED | IXGBEVF_QV_STATE_DISABLED)
 210 #define IXGBEVF_QV_STATE_NAPI_YIELD     8    /* NAPI yielded this QV */
 211 #define IXGBEVF_QV_STATE_POLL_YIELD     16   /* poll yielded this QV */
 212 #define IXGBEVF_QV_YIELD        (IXGBEVF_QV_STATE_NAPI_YIELD | \
 213                                  IXGBEVF_QV_STATE_POLL_YIELD)
 214 #define IXGBEVF_QV_USER_PEND    (IXGBEVF_QV_STATE_POLL | \
 215                                  IXGBEVF_QV_STATE_POLL_YIELD)
 216         spinlock_t lock;
 217 #endif /* CONFIG_NET_RX_BUSY_POLL */
 218 };
 219
 220 #ifdef CONFIG_NET_RX_BUSY_POLL
 221 static inline void ixgbevf_qv_init_lock(struct ixgbevf_q_vector *q_vector)
 222 {
 223         spin_lock_init(&q_vector->lock);
 224         q_vector->state = IXGBEVF_QV_STATE_IDLE;
 225 }
 226
 227 /* called from the device poll routine to get ownership of a q_vector */
 228 static inline bool ixgbevf_qv_lock_napi(struct ixgbevf_q_vector *q_vector)
 229 {
 230         int rc = true;
 231
 232         spin_lock_bh(&q_vector->lock);
 233         if (q_vector->state & IXGBEVF_QV_LOCKED) {
 234                 WARN_ON(q_vector->state & IXGBEVF_QV_STATE_NAPI);
 235                 q_vector->state |= IXGBEVF_QV_STATE_NAPI_YIELD;
 236                 rc = false;
 237 #ifdef BP_EXTENDED_STATS
 238                 q_vector->tx.ring->stats.yields++;
 239 #endif
 240         } else {
 241                 /* we don't care if someone yielded */
 242                 q_vector->state = IXGBEVF_QV_STATE_NAPI;
 243         }
 244         spin_unlock_bh(&q_vector->lock);
 245         return rc;
 246 }
 247
 248 /* returns true is someone tried to get the qv while napi had it */
 249 static inline bool ixgbevf_qv_unlock_napi(struct ixgbevf_q_vector *q_vector)
 250 {
 251         int rc = false;
 252
 253         spin_lock_bh(&q_vector->lock);
 254         WARN_ON(q_vector->state & (IXGBEVF_QV_STATE_POLL |
 255                                    IXGBEVF_QV_STATE_NAPI_YIELD));
 256
 257         if (q_vector->state & IXGBEVF_QV_STATE_POLL_YIELD)
 258                 rc = true;
 259         /* reset state to idle, unless QV is disabled */
 260         q_vector->state &= IXGBEVF_QV_STATE_DISABLED;
 261         spin_unlock_bh(&q_vector->lock);
 262         return rc;
 263 }
 264
 265 /* called from ixgbevf_low_latency_poll() */
 266 static inline bool ixgbevf_qv_lock_poll(struct ixgbevf_q_vector *q_vector)
 267 {
 268         int rc = true;
 269
 270         spin_lock_bh(&q_vector->lock);
 271         if ((q_vector->state & IXGBEVF_QV_LOCKED)) {
 272                 q_vector->state |= IXGBEVF_QV_STATE_POLL_YIELD;
 273                 rc = false;
 274 #ifdef BP_EXTENDED_STATS
 275                 q_vector->rx.ring->stats.yields++;
 276 #endif
 277         } else {
 278                 /* preserve yield marks */
 279                 q_vector->state |= IXGBEVF_QV_STATE_POLL;
 280         }
 281         spin_unlock_bh(&q_vector->lock);
 282         return rc;
 283 }
 284
 285 /* returns true if someone tried to get the qv while it was locked */
 286 static inline bool ixgbevf_qv_unlock_poll(struct ixgbevf_q_vector *q_vector)
 287 {
 288         int rc = false;
 289
 290         spin_lock_bh(&q_vector->lock);
 291         WARN_ON(q_vector->state & (IXGBEVF_QV_STATE_NAPI));
 292
 293         if (q_vector->state & IXGBEVF_QV_STATE_POLL_YIELD)
 294                 rc = true;
 295         /* reset state to idle, unless QV is disabled */
 296         q_vector->state &= IXGBEVF_QV_STATE_DISABLED;
 297         spin_unlock_bh(&q_vector->lock);
 298         return rc;
 299 }
 300
 301 /* true if a socket is polling, even if it did not get the lock */
 302 static inline bool ixgbevf_qv_busy_polling(struct ixgbevf_q_vector *q_vector)
 303 {
 304         WARN_ON(!(q_vector->state & IXGBEVF_QV_OWNED));
 305         return q_vector->state & IXGBEVF_QV_USER_PEND;
 306 }
 307
 308 /* false if QV is currently owned */
 309 static inline bool ixgbevf_qv_disable(struct ixgbevf_q_vector *q_vector)
 310 {
 311         int rc = true;
 312
 313         spin_lock_bh(&q_vector->lock);
 314         if (q_vector->state & IXGBEVF_QV_OWNED)
 315                 rc = false;
 316         q_vector->state |= IXGBEVF_QV_STATE_DISABLED;
 317         spin_unlock_bh(&q_vector->lock);
 318         return rc;
 319 }
 320
 321 #endif /* CONFIG_NET_RX_BUSY_POLL */
 322
 323 /* microsecond values for various ITR rates shifted by 2 to fit itr register
 324  * with the first 3 bits reserved 0
 325  */
 326 #define IXGBE_MIN_RSC_ITR       24
 327 #define IXGBE_100K_ITR          40
 328 #define IXGBE_20K_ITR           200
 329 #define IXGBE_12K_ITR           336
 330
 331 /* Helper macros to switch between ints/sec and what the register uses.
 332  * And yes, it's the same math going both ways.  The lowest value
 333  * supported by all of the ixgbe hardware is 8.
 334  */
 335 #define EITR_INTS_PER_SEC_TO_REG(_eitr) \
 336         ((_eitr) ? (1000000000 / ((_eitr) * 256)) : 8)
 337 #define EITR_REG_TO_INTS_PER_SEC EITR_INTS_PER_SEC_TO_REG
 338
 339 /* ixgbevf_test_staterr - tests bits in Rx descriptor status and error fields */
 340 static inline __le32 ixgbevf_test_staterr(union ixgbe_adv_rx_desc *rx_desc,
 341                                           const u32 stat_err_bits)
 342 {
 343         return rx_desc->wb.upper.status_error & cpu_to_le32(stat_err_bits);
 344 }
 345
 346 static inline u16 ixgbevf_desc_unused(struct ixgbevf_ring *ring)
 347 {
 348         u16 ntc = ring->next_to_clean;
 349         u16 ntu = ring->next_to_use;
 350
 351         return ((ntc > ntu) ? 0 : ring->count) + ntc - ntu - 1;
 352 }
 353
 354 static inline void ixgbevf_write_tail(struct ixgbevf_ring *ring, u32 value)
 355 {
 356         writel(value, ring->tail);
 357 }
 358
 359 #define IXGBEVF_RX_DESC(R, i)   \
 360         (&(((union ixgbe_adv_rx_desc *)((R)->desc))[i]))
 361 #define IXGBEVF_TX_DESC(R, i)   \
 362         (&(((union ixgbe_adv_tx_desc *)((R)->desc))[i]))
 363 #define IXGBEVF_TX_CTXTDESC(R, i)       \
 364         (&(((struct ixgbe_adv_tx_context_desc *)((R)->desc))[i]))
 365
 366 #define IXGBE_MAX_JUMBO_FRAME_SIZE      9728 /* Maximum Supported Size 9.5KB */
 367
 368 #define OTHER_VECTOR    1
 369 #define NON_Q_VECTORS   (OTHER_VECTOR)
 370
 371 #define MAX_MSIX_Q_VECTORS      2
 372
 373 #define MIN_MSIX_Q_VECTORS      1
 374 #define MIN_MSIX_COUNT          (MIN_MSIX_Q_VECTORS + NON_Q_VECTORS)
 375
 376 /* board specific private data structure */
 377 struct ixgbevf_adapter {
 378         /* this field must be first, see ixgbevf_process_skb_fields */
 379         unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
 380
 381         struct ixgbevf_q_vector *q_vector[MAX_MSIX_Q_VECTORS];
 382
 383         /* Interrupt Throttle Rate */
 384         u16 rx_itr_setting;
 385         u16 tx_itr_setting;
 386
 387         /* interrupt masks */
 388         u32 eims_enable_mask;
 389         u32 eims_other;
 390
 391         /* TX */
 392         int num_tx_queues;
 393         struct ixgbevf_ring *tx_ring[MAX_TX_QUEUES]; /* One per active queue */
 394         u64 restart_queue;
 395         u32 tx_timeout_count;
 396
 397         /* RX */
 398         int num_rx_queues;
 399         struct ixgbevf_ring *rx_ring[MAX_TX_QUEUES]; /* One per active queue */
 400         u64 hw_csum_rx_error;
 401         u64 hw_rx_no_dma_resources;
 402         int num_msix_vectors;
 403         u32 alloc_rx_page_failed;
 404         u32 alloc_rx_buff_failed;
 405
 406         /* Some features need tri-state capability,
 407          * thus the additional *_CAPABLE flags.
 408          */
 409         u32 flags;
 410 #define IXGBEVF_FLAG_RESET_REQUESTED            (u32)(1)
 411 #define IXGBEVF_FLAG_QUEUE_RESET_REQUESTED      (u32)(1 << 2)
 412
 413         struct msix_entry *msix_entries;
 414
 415         /* OS defined structs */
 416         struct net_device *netdev;
 417         struct pci_dev *pdev;
 418
 419         /* structs defined in ixgbe_vf.h */
 420         struct ixgbe_hw hw;
 421         u16 msg_enable;
 422         /* Interrupt Throttle Rate */
 423         u32 eitr_param;
 424
 425         struct ixgbevf_hw_stats stats;
 426
 427         unsigned long state;
 428         u64 tx_busy;
 429         unsigned int tx_ring_count;
 430         unsigned int rx_ring_count;
 431
 432 #ifdef BP_EXTENDED_STATS
 433         u64 bp_rx_yields;
 434         u64 bp_rx_cleaned;
 435         u64 bp_rx_missed;
 436
 437         u64 bp_tx_yields;
 438         u64 bp_tx_cleaned;
 439         u64 bp_tx_missed;
 440 #endif
 441
 442         u8 __iomem *io_addr; /* Mainly for iounmap use */
 443         u32 link_speed;
 444         bool link_up;
 445
 446         struct timer_list service_timer;
 447         struct work_struct service_task;
 448
 449         spinlock_t mbx_lock;
 450         unsigned long last_reset;
 451
 452         u32 rss_key[IXGBEVF_VFRSSRK_REGS];
 453         u8 rss_indir_tbl[IXGBEVF_X550_VFRETA_SIZE];
 454 };
 455
 456 enum ixbgevf_state_t {
 457         __IXGBEVF_TESTING,
 458         __IXGBEVF_RESETTING,
 459         __IXGBEVF_DOWN,
 460         __IXGBEVF_DISABLED,
 461         __IXGBEVF_REMOVING,
 462         __IXGBEVF_SERVICE_SCHED,
 463         __IXGBEVF_SERVICE_INITED,
 464 };
 465
 466 enum ixgbevf_boards {
 467         board_82599_vf,
 468         board_X540_vf,
 469         board_X550_vf,
 470         board_X550EM_x_vf,
 471 };
 472
 473 enum ixgbevf_xcast_modes {
 474         IXGBEVF_XCAST_MODE_NONE = 0,
 475         IXGBEVF_XCAST_MODE_MULTI,
 476         IXGBEVF_XCAST_MODE_ALLMULTI,
 477 };
 478
 479 extern const struct ixgbevf_info ixgbevf_82599_vf_info;
 480 extern const struct ixgbevf_info ixgbevf_X540_vf_info;
 481 extern const struct ixgbevf_info ixgbevf_X550_vf_info;
 482 extern const struct ixgbevf_info ixgbevf_X550EM_x_vf_info;
 483 extern const struct ixgbe_mbx_operations ixgbevf_mbx_ops;
 484
 485 /* needed by ethtool.c */
 486 extern const char ixgbevf_driver_name[];
 487 extern const char ixgbevf_driver_version[];
 488
 489 int ixgbevf_open(struct net_device *netdev);
 490 int ixgbevf_close(struct net_device *netdev);
 491 void ixgbevf_up(struct ixgbevf_adapter *adapter);
 492 void ixgbevf_down(struct ixgbevf_adapter *adapter);
 493 void ixgbevf_reinit_locked(struct ixgbevf_adapter *adapter);
 494 void ixgbevf_reset(struct ixgbevf_adapter *adapter);
 495 void ixgbevf_set_ethtool_ops(struct net_device *netdev);
 496 int ixgbevf_setup_rx_resources(struct ixgbevf_ring *);
 497 int ixgbevf_setup_tx_resources(struct ixgbevf_ring *);
 498 void ixgbevf_free_rx_resources(struct ixgbevf_ring *);
 499 void ixgbevf_free_tx_resources(struct ixgbevf_ring *);
 500 void ixgbevf_update_stats(struct ixgbevf_adapter *adapter);
 501 int ethtool_ioctl(struct ifreq *ifr);
 502
 503 extern void ixgbevf_write_eitr(struct ixgbevf_q_vector *q_vector);
 504
 505 void ixgbe_napi_add_all(struct ixgbevf_adapter *adapter);
 506 void ixgbe_napi_del_all(struct ixgbevf_adapter *adapter);
 507
 508 #ifdef DEBUG
 509 char *ixgbevf_get_hw_dev_name(struct ixgbe_hw *hw);
 510 #define hw_dbg(hw, format, arg...) \
 511         printk(KERN_DEBUG "%s: " format, ixgbevf_get_hw_dev_name(hw), ##arg)
 512 #else
 513 #define hw_dbg(hw, format, arg...) do {} while (0)
 514 #endif
 515
 516 #endif /* _IXGBEVF_H_ */