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

   1 /*******************************************************************************
   2
   3   Intel 82599 Virtual Function driver
   4   Copyright(c) 1999 - 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 with
  16   this program; if not, write to the Free Software Foundation, Inc.,
  17   51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  18
  19   The full GNU General Public License is included in this distribution in
  20   the file called "COPYING".
  21
  22   Contact Information:
  23   e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  24   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  25
  26 *******************************************************************************/
  27
  28 #ifndef _IXGBEVF_H_
  29 #define _IXGBEVF_H_
  30
  31 #include <linux/types.h>
  32 #include <linux/bitops.h>
  33 #include <linux/timer.h>
  34 #include <linux/io.h>
  35 #include <linux/netdevice.h>
  36 #include <linux/if_vlan.h>
  37 #include <linux/u64_stats_sync.h>
  38
  39 #include "vf.h"
  40
  41 #ifdef CONFIG_NET_RX_BUSY_POLL
  42 #include <net/busy_poll.h>
  43 #define BP_EXTENDED_STATS
  44 #endif
  45
  46 /* wrapper around a pointer to a socket buffer,
  47  * so a DMA handle can be stored along with the buffer */
  48 struct ixgbevf_tx_buffer {
  49         union ixgbe_adv_tx_desc *next_to_watch;
  50         unsigned long time_stamp;
  51         struct sk_buff *skb;
  52         unsigned int bytecount;
  53         unsigned short gso_segs;
  54         __be16 protocol;
  55         DEFINE_DMA_UNMAP_ADDR(dma);
  56         DEFINE_DMA_UNMAP_LEN(len);
  57         u32 tx_flags;
  58 };
  59
  60 struct ixgbevf_rx_buffer {
  61         struct sk_buff *skb;
  62         dma_addr_t dma;
  63 };
  64
  65 struct ixgbevf_stats {
  66         u64 packets;
  67         u64 bytes;
  68 #ifdef BP_EXTENDED_STATS
  69         u64 yields;
  70         u64 misses;
  71         u64 cleaned;
  72 #endif
  73 };
  74
  75 struct ixgbevf_tx_queue_stats {
  76         u64 restart_queue;
  77         u64 tx_busy;
  78         u64 tx_done_old;
  79 };
  80
  81 struct ixgbevf_rx_queue_stats {
  82         u64 non_eop_descs;
  83         u64 alloc_rx_page_failed;
  84         u64 alloc_rx_buff_failed;
  85         u64 csum_err;
  86 };
  87
  88 struct ixgbevf_ring {
  89         struct ixgbevf_ring *next;
  90         struct net_device *netdev;
  91         struct device *dev;
  92         void *desc;                     /* descriptor ring memory */
  93         dma_addr_t dma;                 /* phys. address of descriptor ring */
  94         unsigned int size;              /* length in bytes */
  95         unsigned int count;             /* amount of descriptors */
  96         unsigned int next_to_use;
  97         unsigned int next_to_clean;
  98
  99         union {
 100                 struct ixgbevf_tx_buffer *tx_buffer_info;
 101                 struct ixgbevf_rx_buffer *rx_buffer_info;
 102         };
 103
 104         struct ixgbevf_stats stats;
 105         struct u64_stats_sync syncp;
 106         union {
 107                 struct ixgbevf_tx_queue_stats tx_stats;
 108                 struct ixgbevf_rx_queue_stats rx_stats;
 109         };
 110
 111         u64 hw_csum_rx_error;
 112         u8 __iomem *tail;
 113
 114         u16 reg_idx; /* holds the special value that gets the hardware register
 115                       * offset associated with this ring, which is different
 116                       * for DCB and RSS modes */
 117
 118         u16 rx_buf_len;
 119         int queue_index; /* needed for multiqueue queue management */
 120 };
 121
 122 /* How many Rx Buffers do we bundle into one write to the hardware ? */
 123 #define IXGBEVF_RX_BUFFER_WRITE 16      /* Must be power of 2 */
 124
 125 #define MAX_RX_QUEUES IXGBE_VF_MAX_RX_QUEUES
 126 #define MAX_TX_QUEUES IXGBE_VF_MAX_TX_QUEUES
 127
 128 #define IXGBEVF_DEFAULT_TXD   1024
 129 #define IXGBEVF_DEFAULT_RXD   512
 130 #define IXGBEVF_MAX_TXD       4096
 131 #define IXGBEVF_MIN_TXD       64
 132 #define IXGBEVF_MAX_RXD       4096
 133 #define IXGBEVF_MIN_RXD       64
 134
 135 /* Supported Rx Buffer Sizes */
 136 #define IXGBEVF_RXBUFFER_256   256    /* Used for packet split */
 137 #define IXGBEVF_RXBUFFER_2K    2048
 138 #define IXGBEVF_RXBUFFER_4K    4096
 139 #define IXGBEVF_RXBUFFER_8K    8192
 140 #define IXGBEVF_RXBUFFER_10K   10240
 141
 142 #define IXGBEVF_RX_HDR_SIZE IXGBEVF_RXBUFFER_256
 143
 144 #define MAXIMUM_ETHERNET_VLAN_SIZE (VLAN_ETH_FRAME_LEN + ETH_FCS_LEN)
 145
 146 #define IXGBE_TX_FLAGS_CSUM             (u32)(1)
 147 #define IXGBE_TX_FLAGS_VLAN             (u32)(1 << 1)
 148 #define IXGBE_TX_FLAGS_TSO              (u32)(1 << 2)
 149 #define IXGBE_TX_FLAGS_IPV4             (u32)(1 << 3)
 150 #define IXGBE_TX_FLAGS_VLAN_MASK        0xffff0000
 151 #define IXGBE_TX_FLAGS_VLAN_PRIO_MASK   0x0000e000
 152 #define IXGBE_TX_FLAGS_VLAN_SHIFT       16
 153
 154 struct ixgbevf_ring_container {
 155         struct ixgbevf_ring *ring;      /* pointer to linked list of rings */
 156         unsigned int total_bytes;       /* total bytes processed this int */
 157         unsigned int total_packets;     /* total packets processed this int */
 158         u8 count;                       /* total number of rings in vector */
 159         u8 itr;                         /* current ITR setting for ring */
 160 };
 161
 162 /* iterator for handling rings in ring container */
 163 #define ixgbevf_for_each_ring(pos, head) \
 164         for (pos = (head).ring; pos != NULL; pos = pos->next)
 165
 166 /* MAX_MSIX_Q_VECTORS of these are allocated,
 167  * but we only use one per queue-specific vector.
 168  */
 169 struct ixgbevf_q_vector {
 170         struct ixgbevf_adapter *adapter;
 171         u16 v_idx;              /* index of q_vector within array, also used for
 172                                  * finding the bit in EICR and friends that
 173                                  * represents the vector for this ring */
 174         u16 itr;                /* Interrupt throttle rate written to EITR */
 175         struct napi_struct napi;
 176         struct ixgbevf_ring_container rx, tx;
 177         char name[IFNAMSIZ + 9];
 178 #ifdef CONFIG_NET_RX_BUSY_POLL
 179         unsigned int state;
 180 #define IXGBEVF_QV_STATE_IDLE           0
 181 #define IXGBEVF_QV_STATE_NAPI           1    /* NAPI owns this QV */
 182 #define IXGBEVF_QV_STATE_POLL           2    /* poll owns this QV */
 183 #define IXGBEVF_QV_STATE_DISABLED       4    /* QV is disabled */
 184 #define IXGBEVF_QV_OWNED (IXGBEVF_QV_STATE_NAPI | IXGBEVF_QV_STATE_POLL)
 185 #define IXGBEVF_QV_LOCKED (IXGBEVF_QV_OWNED | IXGBEVF_QV_STATE_DISABLED)
 186 #define IXGBEVF_QV_STATE_NAPI_YIELD     8    /* NAPI yielded this QV */
 187 #define IXGBEVF_QV_STATE_POLL_YIELD     16   /* poll yielded this QV */
 188 #define IXGBEVF_QV_YIELD (IXGBEVF_QV_STATE_NAPI_YIELD | IXGBEVF_QV_STATE_POLL_YIELD)
 189 #define IXGBEVF_QV_USER_PEND (IXGBEVF_QV_STATE_POLL | IXGBEVF_QV_STATE_POLL_YIELD)
 190         spinlock_t lock;
 191 #endif /* CONFIG_NET_RX_BUSY_POLL */
 192 };
 193 #ifdef CONFIG_NET_RX_BUSY_POLL
 194 static inline void ixgbevf_qv_init_lock(struct ixgbevf_q_vector *q_vector)
 195 {
 196
 197         spin_lock_init(&q_vector->lock);
 198         q_vector->state = IXGBEVF_QV_STATE_IDLE;
 199 }
 200
 201 /* called from the device poll routine to get ownership of a q_vector */
 202 static inline bool ixgbevf_qv_lock_napi(struct ixgbevf_q_vector *q_vector)
 203 {
 204         int rc = true;
 205         spin_lock_bh(&q_vector->lock);
 206         if (q_vector->state & IXGBEVF_QV_LOCKED) {
 207                 WARN_ON(q_vector->state & IXGBEVF_QV_STATE_NAPI);
 208                 q_vector->state |= IXGBEVF_QV_STATE_NAPI_YIELD;
 209                 rc = false;
 210 #ifdef BP_EXTENDED_STATS
 211                 q_vector->tx.ring->stats.yields++;
 212 #endif
 213         } else {
 214                 /* we don't care if someone yielded */
 215                 q_vector->state = IXGBEVF_QV_STATE_NAPI;
 216         }
 217         spin_unlock_bh(&q_vector->lock);
 218         return rc;
 219 }
 220
 221 /* returns true is someone tried to get the qv while napi had it */
 222 static inline bool ixgbevf_qv_unlock_napi(struct ixgbevf_q_vector *q_vector)
 223 {
 224         int rc = false;
 225         spin_lock_bh(&q_vector->lock);
 226         WARN_ON(q_vector->state & (IXGBEVF_QV_STATE_POLL |
 227                                    IXGBEVF_QV_STATE_NAPI_YIELD));
 228
 229         if (q_vector->state & IXGBEVF_QV_STATE_POLL_YIELD)
 230                 rc = true;
 231         /* reset state to idle, unless QV is disabled */
 232         q_vector->state &= IXGBEVF_QV_STATE_DISABLED;
 233         spin_unlock_bh(&q_vector->lock);
 234         return rc;
 235 }
 236
 237 /* called from ixgbevf_low_latency_poll() */
 238 static inline bool ixgbevf_qv_lock_poll(struct ixgbevf_q_vector *q_vector)
 239 {
 240         int rc = true;
 241         spin_lock_bh(&q_vector->lock);
 242         if ((q_vector->state & IXGBEVF_QV_LOCKED)) {
 243                 q_vector->state |= IXGBEVF_QV_STATE_POLL_YIELD;
 244                 rc = false;
 245 #ifdef BP_EXTENDED_STATS
 246                 q_vector->rx.ring->stats.yields++;
 247 #endif
 248         } else {
 249                 /* preserve yield marks */
 250                 q_vector->state |= IXGBEVF_QV_STATE_POLL;
 251         }
 252         spin_unlock_bh(&q_vector->lock);
 253         return rc;
 254 }
 255
 256 /* returns true if someone tried to get the qv while it was locked */
 257 static inline bool ixgbevf_qv_unlock_poll(struct ixgbevf_q_vector *q_vector)
 258 {
 259         int rc = false;
 260         spin_lock_bh(&q_vector->lock);
 261         WARN_ON(q_vector->state & (IXGBEVF_QV_STATE_NAPI));
 262
 263         if (q_vector->state & IXGBEVF_QV_STATE_POLL_YIELD)
 264                 rc = true;
 265         /* reset state to idle, unless QV is disabled */
 266         q_vector->state &= IXGBEVF_QV_STATE_DISABLED;
 267         spin_unlock_bh(&q_vector->lock);
 268         return rc;
 269 }
 270
 271 /* true if a socket is polling, even if it did not get the lock */
 272 static inline bool ixgbevf_qv_busy_polling(struct ixgbevf_q_vector *q_vector)
 273 {
 274         WARN_ON(!(q_vector->state & IXGBEVF_QV_OWNED));
 275         return q_vector->state & IXGBEVF_QV_USER_PEND;
 276 }
 277
 278 /* false if QV is currently owned */
 279 static inline bool ixgbevf_qv_disable(struct ixgbevf_q_vector *q_vector)
 280 {
 281         int rc = true;
 282         spin_lock_bh(&q_vector->lock);
 283         if (q_vector->state & IXGBEVF_QV_OWNED)
 284                 rc = false;
 285         q_vector->state |= IXGBEVF_QV_STATE_DISABLED;
 286         spin_unlock_bh(&q_vector->lock);
 287         return rc;
 288 }
 289
 290 #endif /* CONFIG_NET_RX_BUSY_POLL */
 291
 292 /*
 293  * microsecond values for various ITR rates shifted by 2 to fit itr register
 294  * with the first 3 bits reserved 0
 295  */
 296 #define IXGBE_MIN_RSC_ITR       24
 297 #define IXGBE_100K_ITR          40
 298 #define IXGBE_20K_ITR           200
 299 #define IXGBE_10K_ITR           400
 300 #define IXGBE_8K_ITR            500
 301
 302 /* Helper macros to switch between ints/sec and what the register uses.
 303  * And yes, it's the same math going both ways.  The lowest value
 304  * supported by all of the ixgbe hardware is 8.
 305  */
 306 #define EITR_INTS_PER_SEC_TO_REG(_eitr) \
 307         ((_eitr) ? (1000000000 / ((_eitr) * 256)) : 8)
 308 #define EITR_REG_TO_INTS_PER_SEC EITR_INTS_PER_SEC_TO_REG
 309
 310 /* ixgbevf_test_staterr - tests bits in Rx descriptor status and error fields */
 311 static inline __le32 ixgbevf_test_staterr(union ixgbe_adv_rx_desc *rx_desc,
 312                                           const u32 stat_err_bits)
 313 {
 314         return rx_desc->wb.upper.status_error & cpu_to_le32(stat_err_bits);
 315 }
 316
 317 static inline u16 ixgbevf_desc_unused(struct ixgbevf_ring *ring)
 318 {
 319         u16 ntc = ring->next_to_clean;
 320         u16 ntu = ring->next_to_use;
 321
 322         return ((ntc > ntu) ? 0 : ring->count) + ntc - ntu - 1;
 323 }
 324
 325 static inline void ixgbevf_write_tail(struct ixgbevf_ring *ring, u32 value)
 326 {
 327         writel(value, ring->tail);
 328 }
 329
 330 #define IXGBEVF_RX_DESC(R, i)       \
 331         (&(((union ixgbe_adv_rx_desc *)((R)->desc))[i]))
 332 #define IXGBEVF_TX_DESC(R, i)       \
 333         (&(((union ixgbe_adv_tx_desc *)((R)->desc))[i]))
 334 #define IXGBEVF_TX_CTXTDESC(R, i)           \
 335         (&(((struct ixgbe_adv_tx_context_desc *)((R)->desc))[i]))
 336
 337 #define IXGBE_MAX_JUMBO_FRAME_SIZE      9728 /* Maximum Supported Size 9.5KB */
 338
 339 #define OTHER_VECTOR 1
 340 #define NON_Q_VECTORS (OTHER_VECTOR)
 341
 342 #define MAX_MSIX_Q_VECTORS 2
 343
 344 #define MIN_MSIX_Q_VECTORS 1
 345 #define MIN_MSIX_COUNT (MIN_MSIX_Q_VECTORS + NON_Q_VECTORS)
 346
 347 /* board specific private data structure */
 348 struct ixgbevf_adapter {
 349         /* this field must be first, see ixgbevf_process_skb_fields */
 350         unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
 351
 352         struct timer_list watchdog_timer;
 353         struct work_struct reset_task;
 354         struct ixgbevf_q_vector *q_vector[MAX_MSIX_Q_VECTORS];
 355
 356         /* Interrupt Throttle Rate */
 357         u16 rx_itr_setting;
 358         u16 tx_itr_setting;
 359
 360         /* interrupt masks */
 361         u32 eims_enable_mask;
 362         u32 eims_other;
 363
 364         /* TX */
 365         int num_tx_queues;
 366         struct ixgbevf_ring *tx_ring[MAX_TX_QUEUES]; /* One per active queue */
 367         u64 restart_queue;
 368         u32 tx_timeout_count;
 369
 370         /* RX */
 371         int num_rx_queues;
 372         struct ixgbevf_ring *rx_ring[MAX_TX_QUEUES]; /* One per active queue */
 373         u64 hw_csum_rx_error;
 374         u64 hw_rx_no_dma_resources;
 375         u64 non_eop_descs;
 376         int num_msix_vectors;
 377         u32 alloc_rx_page_failed;
 378         u32 alloc_rx_buff_failed;
 379
 380         /* Some features need tri-state capability,
 381          * thus the additional *_CAPABLE flags.
 382          */
 383         u32 flags;
 384 #define IXGBE_FLAG_IN_WATCHDOG_TASK             (u32)(1)
 385 #define IXGBE_FLAG_IN_NETPOLL                   (u32)(1 << 1)
 386 #define IXGBEVF_FLAG_QUEUE_RESET_REQUESTED      (u32)(1 << 2)
 387
 388         struct msix_entry *msix_entries;
 389
 390         /* OS defined structs */
 391         struct net_device *netdev;
 392         struct pci_dev *pdev;
 393
 394         /* structs defined in ixgbe_vf.h */
 395         struct ixgbe_hw hw;
 396         u16 msg_enable;
 397         /* Interrupt Throttle Rate */
 398         u32 eitr_param;
 399
 400         struct ixgbevf_hw_stats stats;
 401
 402         unsigned long state;
 403         u64 tx_busy;
 404         unsigned int tx_ring_count;
 405         unsigned int rx_ring_count;
 406
 407 #ifdef BP_EXTENDED_STATS
 408         u64 bp_rx_yields;
 409         u64 bp_rx_cleaned;
 410         u64 bp_rx_missed;
 411
 412         u64 bp_tx_yields;
 413         u64 bp_tx_cleaned;
 414         u64 bp_tx_missed;
 415 #endif
 416
 417         u8 __iomem *io_addr; /* Mainly for iounmap use */
 418         u32 link_speed;
 419         bool link_up;
 420
 421         spinlock_t mbx_lock;
 422
 423         struct work_struct watchdog_task;
 424 };
 425
 426 enum ixbgevf_state_t {
 427         __IXGBEVF_TESTING,
 428         __IXGBEVF_RESETTING,
 429         __IXGBEVF_DOWN,
 430         __IXGBEVF_DISABLED,
 431         __IXGBEVF_REMOVING,
 432         __IXGBEVF_WORK_INIT,
 433 };
 434
 435 struct ixgbevf_cb {
 436         struct sk_buff *prev;
 437 };
 438 #define IXGBE_CB(skb) ((struct ixgbevf_cb *)(skb)->cb)
 439
 440 enum ixgbevf_boards {
 441         board_82599_vf,
 442         board_X540_vf,
 443 };
 444
 445 extern const struct ixgbevf_info ixgbevf_82599_vf_info;
 446 extern const struct ixgbevf_info ixgbevf_X540_vf_info;
 447 extern const struct ixgbe_mbx_operations ixgbevf_mbx_ops;
 448
 449 /* needed by ethtool.c */
 450 extern const char ixgbevf_driver_name[];
 451 extern const char ixgbevf_driver_version[];
 452
 453 void ixgbevf_up(struct ixgbevf_adapter *adapter);
 454 void ixgbevf_down(struct ixgbevf_adapter *adapter);
 455 void ixgbevf_reinit_locked(struct ixgbevf_adapter *adapter);
 456 void ixgbevf_reset(struct ixgbevf_adapter *adapter);
 457 void ixgbevf_set_ethtool_ops(struct net_device *netdev);
 458 int ixgbevf_setup_rx_resources(struct ixgbevf_ring *);
 459 int ixgbevf_setup_tx_resources(struct ixgbevf_ring *);
 460 void ixgbevf_free_rx_resources(struct ixgbevf_ring *);
 461 void ixgbevf_free_tx_resources(struct ixgbevf_ring *);
 462 void ixgbevf_update_stats(struct ixgbevf_adapter *adapter);
 463 int ethtool_ioctl(struct ifreq *ifr);
 464
 465 extern void ixgbevf_write_eitr(struct ixgbevf_q_vector *q_vector);
 466
 467 void ixgbe_napi_add_all(struct ixgbevf_adapter *adapter);
 468 void ixgbe_napi_del_all(struct ixgbevf_adapter *adapter);
 469
 470 #ifdef DEBUG
 471 char *ixgbevf_get_hw_dev_name(struct ixgbe_hw *hw);
 472 #define hw_dbg(hw, format, arg...) \
 473         printk(KERN_DEBUG "%s: " format, ixgbevf_get_hw_dev_name(hw), ##arg)
 474 #else
 475 #define hw_dbg(hw, format, arg...) do {} while (0)
 476 #endif
 477
 478 #endif /* _IXGBEVF_H_ */