drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Copyright(c) 1999 - 2018 Intel Corporation. */
   3
   4 /******************************************************************************
   5  Copyright (c)2006 - 2007 Myricom, Inc. for some LRO specific code
   6 ******************************************************************************/
   7
   8 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
   9
  10 #include <linux/types.h>
  11 #include <linux/bitops.h>
  12 #include <linux/module.h>
  13 #include <linux/pci.h>
  14 #include <linux/netdevice.h>
  15 #include <linux/vmalloc.h>
  16 #include <linux/string.h>
  17 #include <linux/in.h>
  18 #include <linux/ip.h>
  19 #include <linux/tcp.h>
  20 #include <linux/sctp.h>
  21 #include <linux/ipv6.h>
  22 #include <linux/slab.h>
  23 #include <net/checksum.h>
  24 #include <net/ip6_checksum.h>
  25 #include <linux/ethtool.h>
  26 #include <linux/if.h>
  27 #include <linux/if_vlan.h>
  28 #include <linux/prefetch.h>
  29 #include <net/mpls.h>
  30 #include <linux/bpf.h>
  31 #include <linux/bpf_trace.h>
  32 #include <linux/atomic.h>
  33 #include <net/xfrm.h>
  34
  35 #include "ixgbevf.h"
  36
  37 const char ixgbevf_driver_name[] = "ixgbevf";
  38 static const char ixgbevf_driver_string[] =
  39         "Intel(R) 10 Gigabit PCI Express Virtual Function Network Driver";
  40
  41 #define DRV_VERSION "4.1.0-k"
  42 const char ixgbevf_driver_version[] = DRV_VERSION;
  43 static char ixgbevf_copyright[] =
  44         "Copyright (c) 2009 - 2018 Intel Corporation.";
  45
  46 static const struct ixgbevf_info *ixgbevf_info_tbl[] = {
  47         [board_82599_vf]        = &ixgbevf_82599_vf_info,
  48         [board_82599_vf_hv]     = &ixgbevf_82599_vf_hv_info,
  49         [board_X540_vf]         = &ixgbevf_X540_vf_info,
  50         [board_X540_vf_hv]      = &ixgbevf_X540_vf_hv_info,
  51         [board_X550_vf]         = &ixgbevf_X550_vf_info,
  52         [board_X550_vf_hv]      = &ixgbevf_X550_vf_hv_info,
  53         [board_X550EM_x_vf]     = &ixgbevf_X550EM_x_vf_info,
  54         [board_X550EM_x_vf_hv]  = &ixgbevf_X550EM_x_vf_hv_info,
  55         [board_x550em_a_vf]     = &ixgbevf_x550em_a_vf_info,
  56 };
  57
  58 /* ixgbevf_pci_tbl - PCI Device ID Table
  59  *
  60  * Wildcard entries (PCI_ANY_ID) should come last
  61  * Last entry must be all 0s
  62  *
  63  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  64  *   Class, Class Mask, private data (not used) }
  65  */
  66 static const struct pci_device_id ixgbevf_pci_tbl[] = {
  67         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_VF), board_82599_vf },
  68         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_VF_HV), board_82599_vf_hv },
  69         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540_VF), board_X540_vf },
  70         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540_VF_HV), board_X540_vf_hv },
  71         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550_VF), board_X550_vf },
  72         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550_VF_HV), board_X550_vf_hv },
  73         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_VF), board_X550EM_x_vf },
  74         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_VF_HV), board_X550EM_x_vf_hv},
  75         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_A_VF), board_x550em_a_vf },
  76         /* required last entry */
  77         {0, }
  78 };
  79 MODULE_DEVICE_TABLE(pci, ixgbevf_pci_tbl);
  80
  81 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
  82 MODULE_DESCRIPTION("Intel(R) 10 Gigabit Virtual Function Network Driver");
  83 MODULE_LICENSE("GPL v2");
  84 MODULE_VERSION(DRV_VERSION);
  85
  86 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
  87 static int debug = -1;
  88 module_param(debug, int, 0);
  89 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
  90
  91 static struct workqueue_struct *ixgbevf_wq;
  92
  93 static void ixgbevf_service_event_schedule(struct ixgbevf_adapter *adapter)
  94 {
  95         if (!test_bit(__IXGBEVF_DOWN, &adapter->state) &&
  96             !test_bit(__IXGBEVF_REMOVING, &adapter->state) &&
  97             !test_and_set_bit(__IXGBEVF_SERVICE_SCHED, &adapter->state))
  98                 queue_work(ixgbevf_wq, &adapter->service_task);
  99 }
 100
 101 static void ixgbevf_service_event_complete(struct ixgbevf_adapter *adapter)
 102 {
 103         BUG_ON(!test_bit(__IXGBEVF_SERVICE_SCHED, &adapter->state));
 104
 105         /* flush memory to make sure state is correct before next watchdog */
 106         smp_mb__before_atomic();
 107         clear_bit(__IXGBEVF_SERVICE_SCHED, &adapter->state);
 108 }
 109
 110 /* forward decls */
 111 static void ixgbevf_queue_reset_subtask(struct ixgbevf_adapter *adapter);
 112 static void ixgbevf_set_itr(struct ixgbevf_q_vector *q_vector);
 113 static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter *adapter);
 114 static bool ixgbevf_can_reuse_rx_page(struct ixgbevf_rx_buffer *rx_buffer);
 115 static void ixgbevf_reuse_rx_page(struct ixgbevf_ring *rx_ring,
 116                                   struct ixgbevf_rx_buffer *old_buff);
 117
 118 static void ixgbevf_remove_adapter(struct ixgbe_hw *hw)
 119 {
 120         struct ixgbevf_adapter *adapter = hw->back;
 121
 122         if (!hw->hw_addr)
 123                 return;
 124         hw->hw_addr = NULL;
 125         dev_err(&adapter->pdev->dev, "Adapter removed\n");
 126         if (test_bit(__IXGBEVF_SERVICE_INITED, &adapter->state))
 127                 ixgbevf_service_event_schedule(adapter);
 128 }
 129
 130 static void ixgbevf_check_remove(struct ixgbe_hw *hw, u32 reg)
 131 {
 132         u32 value;
 133
 134         /* The following check not only optimizes a bit by not
 135          * performing a read on the status register when the
 136          * register just read was a status register read that
 137          * returned IXGBE_FAILED_READ_REG. It also blocks any
 138          * potential recursion.
 139          */
 140         if (reg == IXGBE_VFSTATUS) {
 141                 ixgbevf_remove_adapter(hw);
 142                 return;
 143         }
 144         value = ixgbevf_read_reg(hw, IXGBE_VFSTATUS);
 145         if (value == IXGBE_FAILED_READ_REG)
 146                 ixgbevf_remove_adapter(hw);
 147 }
 148
 149 u32 ixgbevf_read_reg(struct ixgbe_hw *hw, u32 reg)
 150 {
 151         u8 __iomem *reg_addr = READ_ONCE(hw->hw_addr);
 152         u32 value;
 153
 154         if (IXGBE_REMOVED(reg_addr))
 155                 return IXGBE_FAILED_READ_REG;
 156         value = readl(reg_addr + reg);
 157         if (unlikely(value == IXGBE_FAILED_READ_REG))
 158                 ixgbevf_check_remove(hw, reg);
 159         return value;
 160 }
 161
 162 /**
 163  * ixgbevf_set_ivar - set IVAR registers - maps interrupt causes to vectors
 164  * @adapter: pointer to adapter struct
 165  * @direction: 0 for Rx, 1 for Tx, -1 for other causes
 166  * @queue: queue to map the corresponding interrupt to
 167  * @msix_vector: the vector to map to the corresponding queue
 168  **/
 169 static void ixgbevf_set_ivar(struct ixgbevf_adapter *adapter, s8 direction,
 170                              u8 queue, u8 msix_vector)
 171 {
 172         u32 ivar, index;
 173         struct ixgbe_hw *hw = &adapter->hw;
 174
 175         if (direction == -1) {
 176                 /* other causes */
 177                 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
 178                 ivar = IXGBE_READ_REG(hw, IXGBE_VTIVAR_MISC);
 179                 ivar &= ~0xFF;
 180                 ivar |= msix_vector;
 181                 IXGBE_WRITE_REG(hw, IXGBE_VTIVAR_MISC, ivar);
 182         } else {
 183                 /* Tx or Rx causes */
 184                 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
 185                 index = ((16 * (queue & 1)) + (8 * direction));
 186                 ivar = IXGBE_READ_REG(hw, IXGBE_VTIVAR(queue >> 1));
 187                 ivar &= ~(0xFF << index);
 188                 ivar |= (msix_vector << index);
 189                 IXGBE_WRITE_REG(hw, IXGBE_VTIVAR(queue >> 1), ivar);
 190         }
 191 }
 192
 193 static u64 ixgbevf_get_tx_completed(struct ixgbevf_ring *ring)
 194 {
 195         return ring->stats.packets;
 196 }
 197
 198 static u32 ixgbevf_get_tx_pending(struct ixgbevf_ring *ring)
 199 {
 200         struct ixgbevf_adapter *adapter = netdev_priv(ring->netdev);
 201         struct ixgbe_hw *hw = &adapter->hw;
 202
 203         u32 head = IXGBE_READ_REG(hw, IXGBE_VFTDH(ring->reg_idx));
 204         u32 tail = IXGBE_READ_REG(hw, IXGBE_VFTDT(ring->reg_idx));
 205
 206         if (head != tail)
 207                 return (head < tail) ?
 208                         tail - head : (tail + ring->count - head);
 209
 210         return 0;
 211 }
 212
 213 static inline bool ixgbevf_check_tx_hang(struct ixgbevf_ring *tx_ring)
 214 {
 215         u32 tx_done = ixgbevf_get_tx_completed(tx_ring);
 216         u32 tx_done_old = tx_ring->tx_stats.tx_done_old;
 217         u32 tx_pending = ixgbevf_get_tx_pending(tx_ring);
 218
 219         clear_check_for_tx_hang(tx_ring);
 220
 221         /* Check for a hung queue, but be thorough. This verifies
 222          * that a transmit has been completed since the previous
 223          * check AND there is at least one packet pending. The
 224          * ARMED bit is set to indicate a potential hang.
 225          */
 226         if ((tx_done_old == tx_done) && tx_pending) {
 227                 /* make sure it is true for two checks in a row */
 228                 return test_and_set_bit(__IXGBEVF_HANG_CHECK_ARMED,
 229                                         &tx_ring->state);
 230         }
 231         /* reset the countdown */
 232         clear_bit(__IXGBEVF_HANG_CHECK_ARMED, &tx_ring->state);
 233
 234         /* update completed stats and continue */
 235         tx_ring->tx_stats.tx_done_old = tx_done;
 236
 237         return false;
 238 }
 239
 240 static void ixgbevf_tx_timeout_reset(struct ixgbevf_adapter *adapter)
 241 {
 242         /* Do the reset outside of interrupt context */
 243         if (!test_bit(__IXGBEVF_DOWN, &adapter->state)) {
 244                 set_bit(__IXGBEVF_RESET_REQUESTED, &adapter->state);
 245                 ixgbevf_service_event_schedule(adapter);
 246         }
 247 }
 248
 249 /**
 250  * ixgbevf_tx_timeout - Respond to a Tx Hang
 251  * @netdev: network interface device structure
 252  **/
 253 static void ixgbevf_tx_timeout(struct net_device *netdev)
 254 {
 255         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
 256
 257         ixgbevf_tx_timeout_reset(adapter);
 258 }
 259
 260 /**
 261  * ixgbevf_clean_tx_irq - Reclaim resources after transmit completes
 262  * @q_vector: board private structure
 263  * @tx_ring: tx ring to clean
 264  * @napi_budget: Used to determine if we are in netpoll
 265  **/
 266 static bool ixgbevf_clean_tx_irq(struct ixgbevf_q_vector *q_vector,
 267                                  struct ixgbevf_ring *tx_ring, int napi_budget)
 268 {
 269         struct ixgbevf_adapter *adapter = q_vector->adapter;
 270         struct ixgbevf_tx_buffer *tx_buffer;
 271         union ixgbe_adv_tx_desc *tx_desc;
 272         unsigned int total_bytes = 0, total_packets = 0, total_ipsec = 0;
 273         unsigned int budget = tx_ring->count / 2;
 274         unsigned int i = tx_ring->next_to_clean;
 275
 276         if (test_bit(__IXGBEVF_DOWN, &adapter->state))
 277                 return true;
 278
 279         tx_buffer = &tx_ring->tx_buffer_info[i];
 280         tx_desc = IXGBEVF_TX_DESC(tx_ring, i);
 281         i -= tx_ring->count;
 282
 283         do {
 284                 union ixgbe_adv_tx_desc *eop_desc = tx_buffer->next_to_watch;
 285
 286                 /* if next_to_watch is not set then there is no work pending */
 287                 if (!eop_desc)
 288                         break;
 289
 290                 /* prevent any other reads prior to eop_desc */
 291                 smp_rmb();
 292
 293                 /* if DD is not set pending work has not been completed */
 294                 if (!(eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)))
 295                         break;
 296
 297                 /* clear next_to_watch to prevent false hangs */
 298                 tx_buffer->next_to_watch = NULL;
 299
 300                 /* update the statistics for this packet */
 301                 total_bytes += tx_buffer->bytecount;
 302                 total_packets += tx_buffer->gso_segs;
 303                 if (tx_buffer->tx_flags & IXGBE_TX_FLAGS_IPSEC)
 304                         total_ipsec++;
 305
 306                 /* free the skb */
 307                 if (ring_is_xdp(tx_ring))
 308                         page_frag_free(tx_buffer->data);
 309                 else
 310                         napi_consume_skb(tx_buffer->skb, napi_budget);
 311
 312                 /* unmap skb header data */
 313                 dma_unmap_single(tx_ring->dev,
 314                                  dma_unmap_addr(tx_buffer, dma),
 315                                  dma_unmap_len(tx_buffer, len),
 316                                  DMA_TO_DEVICE);
 317
 318                 /* clear tx_buffer data */
 319                 dma_unmap_len_set(tx_buffer, len, 0);
 320
 321                 /* unmap remaining buffers */
 322                 while (tx_desc != eop_desc) {
 323                         tx_buffer++;
 324                         tx_desc++;
 325                         i++;
 326                         if (unlikely(!i)) {
 327                                 i -= tx_ring->count;
 328                                 tx_buffer = tx_ring->tx_buffer_info;
 329                                 tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);
 330                         }
 331
 332                         /* unmap any remaining paged data */
 333                         if (dma_unmap_len(tx_buffer, len)) {
 334                                 dma_unmap_page(tx_ring->dev,
 335                                                dma_unmap_addr(tx_buffer, dma),
 336                                                dma_unmap_len(tx_buffer, len),
 337                                                DMA_TO_DEVICE);
 338                                 dma_unmap_len_set(tx_buffer, len, 0);
 339                         }
 340                 }
 341
 342                 /* move us one more past the eop_desc for start of next pkt */
 343                 tx_buffer++;
 344                 tx_desc++;
 345                 i++;
 346                 if (unlikely(!i)) {
 347                         i -= tx_ring->count;
 348                         tx_buffer = tx_ring->tx_buffer_info;
 349                         tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);
 350                 }
 351
 352                 /* issue prefetch for next Tx descriptor */
 353                 prefetch(tx_desc);
 354
 355                 /* update budget accounting */
 356                 budget--;
 357         } while (likely(budget));
 358
 359         i += tx_ring->count;
 360         tx_ring->next_to_clean = i;
 361         u64_stats_update_begin(&tx_ring->syncp);
 362         tx_ring->stats.bytes += total_bytes;
 363         tx_ring->stats.packets += total_packets;
 364         u64_stats_update_end(&tx_ring->syncp);
 365         q_vector->tx.total_bytes += total_bytes;
 366         q_vector->tx.total_packets += total_packets;
 367         adapter->tx_ipsec += total_ipsec;
 368
 369         if (check_for_tx_hang(tx_ring) && ixgbevf_check_tx_hang(tx_ring)) {
 370                 struct ixgbe_hw *hw = &adapter->hw;
 371                 union ixgbe_adv_tx_desc *eop_desc;
 372
 373                 eop_desc = tx_ring->tx_buffer_info[i].next_to_watch;
 374
 375                 pr_err("Detected Tx Unit Hang%s\n"
 376                        "  Tx Queue             <%d>\n"
 377                        "  TDH, TDT             <%x>, <%x>\n"
 378                        "  next_to_use          <%x>\n"
 379                        "  next_to_clean        <%x>\n"
 380                        "tx_buffer_info[next_to_clean]\n"
 381                        "  next_to_watch        <%p>\n"
 382                        "  eop_desc->wb.status  <%x>\n"
 383                        "  time_stamp           <%lx>\n"
 384                        "  jiffies              <%lx>\n",
 385                        ring_is_xdp(tx_ring) ? " XDP" : "",
 386                        tx_ring->queue_index,
 387                        IXGBE_READ_REG(hw, IXGBE_VFTDH(tx_ring->reg_idx)),
 388                        IXGBE_READ_REG(hw, IXGBE_VFTDT(tx_ring->reg_idx)),
 389                        tx_ring->next_to_use, i,
 390                        eop_desc, (eop_desc ? eop_desc->wb.status : 0),
 391                        tx_ring->tx_buffer_info[i].time_stamp, jiffies);
 392
 393                 if (!ring_is_xdp(tx_ring))
 394                         netif_stop_subqueue(tx_ring->netdev,
 395                                             tx_ring->queue_index);
 396
 397                 /* schedule immediate reset if we believe we hung */
 398                 ixgbevf_tx_timeout_reset(adapter);
 399
 400                 return true;
 401         }
 402
 403         if (ring_is_xdp(tx_ring))
 404                 return !!budget;
 405
 406 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
 407         if (unlikely(total_packets && netif_carrier_ok(tx_ring->netdev) &&
 408                      (ixgbevf_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD))) {
 409                 /* Make sure that anybody stopping the queue after this
 410                  * sees the new next_to_clean.
 411                  */
 412                 smp_mb();
 413
 414                 if (__netif_subqueue_stopped(tx_ring->netdev,
 415                                              tx_ring->queue_index) &&
 416                     !test_bit(__IXGBEVF_DOWN, &adapter->state)) {
 417                         netif_wake_subqueue(tx_ring->netdev,
 418                                             tx_ring->queue_index);
 419                         ++tx_ring->tx_stats.restart_queue;
 420                 }
 421         }
 422
 423         return !!budget;
 424 }
 425
 426 /**
 427  * ixgbevf_rx_skb - Helper function to determine proper Rx method
 428  * @q_vector: structure containing interrupt and ring information
 429  * @skb: packet to send up
 430  **/
 431 static void ixgbevf_rx_skb(struct ixgbevf_q_vector *q_vector,
 432                            struct sk_buff *skb)
 433 {
 434         napi_gro_receive(&q_vector->napi, skb);
 435 }
 436
 437 #define IXGBE_RSS_L4_TYPES_MASK \
 438         ((1ul << IXGBE_RXDADV_RSSTYPE_IPV4_TCP) | \
 439          (1ul << IXGBE_RXDADV_RSSTYPE_IPV4_UDP) | \
 440          (1ul << IXGBE_RXDADV_RSSTYPE_IPV6_TCP) | \
 441          (1ul << IXGBE_RXDADV_RSSTYPE_IPV6_UDP))
 442
 443 static inline void ixgbevf_rx_hash(struct ixgbevf_ring *ring,
 444                                    union ixgbe_adv_rx_desc *rx_desc,
 445                                    struct sk_buff *skb)
 446 {
 447         u16 rss_type;
 448
 449         if (!(ring->netdev->features & NETIF_F_RXHASH))
 450                 return;
 451
 452         rss_type = le16_to_cpu(rx_desc->wb.lower.lo_dword.hs_rss.pkt_info) &
 453                    IXGBE_RXDADV_RSSTYPE_MASK;
 454
 455         if (!rss_type)
 456                 return;
 457
 458         skb_set_hash(skb, le32_to_cpu(rx_desc->wb.lower.hi_dword.rss),
 459                      (IXGBE_RSS_L4_TYPES_MASK & (1ul << rss_type)) ?
 460                      PKT_HASH_TYPE_L4 : PKT_HASH_TYPE_L3);
 461 }
 462
 463 /**
 464  * ixgbevf_rx_checksum - indicate in skb if hw indicated a good cksum
 465  * @ring: structure containig ring specific data
 466  * @rx_desc: current Rx descriptor being processed
 467  * @skb: skb currently being received and modified
 468  **/
 469 static inline void ixgbevf_rx_checksum(struct ixgbevf_ring *ring,
 470                                        union ixgbe_adv_rx_desc *rx_desc,
 471                                        struct sk_buff *skb)
 472 {
 473         skb_checksum_none_assert(skb);
 474
 475         /* Rx csum disabled */
 476         if (!(ring->netdev->features & NETIF_F_RXCSUM))
 477                 return;
 478
 479         /* if IP and error */
 480         if (ixgbevf_test_staterr(rx_desc, IXGBE_RXD_STAT_IPCS) &&
 481             ixgbevf_test_staterr(rx_desc, IXGBE_RXDADV_ERR_IPE)) {
 482                 ring->rx_stats.csum_err++;
 483                 return;
 484         }
 485
 486         if (!ixgbevf_test_staterr(rx_desc, IXGBE_RXD_STAT_L4CS))
 487                 return;
 488
 489         if (ixgbevf_test_staterr(rx_desc, IXGBE_RXDADV_ERR_TCPE)) {
 490                 ring->rx_stats.csum_err++;
 491                 return;
 492         }
 493
 494         /* It must be a TCP or UDP packet with a valid checksum */
 495         skb->ip_summed = CHECKSUM_UNNECESSARY;
 496 }
 497
 498 /**
 499  * ixgbevf_process_skb_fields - Populate skb header fields from Rx descriptor
 500  * @rx_ring: rx descriptor ring packet is being transacted on
 501  * @rx_desc: pointer to the EOP Rx descriptor
 502  * @skb: pointer to current skb being populated
 503  *
 504  * This function checks the ring, descriptor, and packet information in
 505  * order to populate the checksum, VLAN, protocol, and other fields within
 506  * the skb.
 507  **/
 508 static void ixgbevf_process_skb_fields(struct ixgbevf_ring *rx_ring,
 509                                        union ixgbe_adv_rx_desc *rx_desc,
 510                                        struct sk_buff *skb)
 511 {
 512         ixgbevf_rx_hash(rx_ring, rx_desc, skb);
 513         ixgbevf_rx_checksum(rx_ring, rx_desc, skb);
 514
 515         if (ixgbevf_test_staterr(rx_desc, IXGBE_RXD_STAT_VP)) {
 516                 u16 vid = le16_to_cpu(rx_desc->wb.upper.vlan);
 517                 unsigned long *active_vlans = netdev_priv(rx_ring->netdev);
 518
 519                 if (test_bit(vid & VLAN_VID_MASK, active_vlans))
 520                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
 521         }
 522
 523         if (ixgbevf_test_staterr(rx_desc, IXGBE_RXDADV_STAT_SECP))
 524                 ixgbevf_ipsec_rx(rx_ring, rx_desc, skb);
 525
 526         skb->protocol = eth_type_trans(skb, rx_ring->netdev);
 527 }
 528
 529 static
 530 struct ixgbevf_rx_buffer *ixgbevf_get_rx_buffer(struct ixgbevf_ring *rx_ring,
 531                                                 const unsigned int size)
 532 {
 533         struct ixgbevf_rx_buffer *rx_buffer;
 534
 535         rx_buffer = &rx_ring->rx_buffer_info[rx_ring->next_to_clean];
 536         prefetchw(rx_buffer->page);
 537
 538         /* we are reusing so sync this buffer for CPU use */
 539         dma_sync_single_range_for_cpu(rx_ring->dev,
 540                                       rx_buffer->dma,
 541                                       rx_buffer->page_offset,
 542                                       size,
 543                                       DMA_FROM_DEVICE);
 544
 545         rx_buffer->pagecnt_bias--;
 546
 547         return rx_buffer;
 548 }
 549
 550 static void ixgbevf_put_rx_buffer(struct ixgbevf_ring *rx_ring,
 551                                   struct ixgbevf_rx_buffer *rx_buffer,
 552                                   struct sk_buff *skb)
 553 {
 554         if (ixgbevf_can_reuse_rx_page(rx_buffer)) {
 555                 /* hand second half of page back to the ring */
 556                 ixgbevf_reuse_rx_page(rx_ring, rx_buffer);
 557         } else {
 558                 if (IS_ERR(skb))
 559                         /* We are not reusing the buffer so unmap it and free
 560                          * any references we are holding to it
 561                          */
 562                         dma_unmap_page_attrs(rx_ring->dev, rx_buffer->dma,
 563                                              ixgbevf_rx_pg_size(rx_ring),
 564                                              DMA_FROM_DEVICE,
 565                                              IXGBEVF_RX_DMA_ATTR);
 566                 __page_frag_cache_drain(rx_buffer->page,
 567                                         rx_buffer->pagecnt_bias);
 568         }
 569
 570         /* clear contents of rx_buffer */
 571         rx_buffer->page = NULL;
 572 }
 573
 574 /**
 575  * ixgbevf_is_non_eop - process handling of non-EOP buffers
 576  * @rx_ring: Rx ring being processed
 577  * @rx_desc: Rx descriptor for current buffer
 578  *
 579  * This function updates next to clean.  If the buffer is an EOP buffer
 580  * this function exits returning false, otherwise it will place the
 581  * sk_buff in the next buffer to be chained and return true indicating
 582  * that this is in fact a non-EOP buffer.
 583  **/
 584 static bool ixgbevf_is_non_eop(struct ixgbevf_ring *rx_ring,
 585                                union ixgbe_adv_rx_desc *rx_desc)
 586 {
 587         u32 ntc = rx_ring->next_to_clean + 1;
 588
 589         /* fetch, update, and store next to clean */
 590         ntc = (ntc < rx_ring->count) ? ntc : 0;
 591         rx_ring->next_to_clean = ntc;
 592
 593         prefetch(IXGBEVF_RX_DESC(rx_ring, ntc));
 594
 595         if (likely(ixgbevf_test_staterr(rx_desc, IXGBE_RXD_STAT_EOP)))
 596                 return false;
 597
 598         return true;
 599 }
 600
 601 static inline unsigned int ixgbevf_rx_offset(struct ixgbevf_ring *rx_ring)
 602 {
 603         return ring_uses_build_skb(rx_ring) ? IXGBEVF_SKB_PAD : 0;
 604 }
 605
 606 static bool ixgbevf_alloc_mapped_page(struct ixgbevf_ring *rx_ring,
 607                                       struct ixgbevf_rx_buffer *bi)
 608 {
 609         struct page *page = bi->page;
 610         dma_addr_t dma;
 611
 612         /* since we are recycling buffers we should seldom need to alloc */
 613         if (likely(page))
 614                 return true;
 615
 616         /* alloc new page for storage */
 617         page = dev_alloc_pages(ixgbevf_rx_pg_order(rx_ring));
 618         if (unlikely(!page)) {
 619                 rx_ring->rx_stats.alloc_rx_page_failed++;
 620                 return false;
 621         }
 622
 623         /* map page for use */
 624         dma = dma_map_page_attrs(rx_ring->dev, page, 0,
 625                                  ixgbevf_rx_pg_size(rx_ring),
 626                                  DMA_FROM_DEVICE, IXGBEVF_RX_DMA_ATTR);
 627
 628         /* if mapping failed free memory back to system since
 629          * there isn't much point in holding memory we can't use
 630          */
 631         if (dma_mapping_error(rx_ring->dev, dma)) {
 632                 __free_pages(page, ixgbevf_rx_pg_order(rx_ring));
 633
 634                 rx_ring->rx_stats.alloc_rx_page_failed++;
 635                 return false;
 636         }
 637
 638         bi->dma = dma;
 639         bi->page = page;
 640         bi->page_offset = ixgbevf_rx_offset(rx_ring);
 641         bi->pagecnt_bias = 1;
 642         rx_ring->rx_stats.alloc_rx_page++;
 643
 644         return true;
 645 }
 646
 647 /**
 648  * ixgbevf_alloc_rx_buffers - Replace used receive buffers; packet split
 649  * @rx_ring: rx descriptor ring (for a specific queue) to setup buffers on
 650  * @cleaned_count: number of buffers to replace
 651  **/
 652 static void ixgbevf_alloc_rx_buffers(struct ixgbevf_ring *rx_ring,
 653                                      u16 cleaned_count)
 654 {
 655         union ixgbe_adv_rx_desc *rx_desc;
 656         struct ixgbevf_rx_buffer *bi;
 657         unsigned int i = rx_ring->next_to_use;
 658
 659         /* nothing to do or no valid netdev defined */
 660         if (!cleaned_count || !rx_ring->netdev)
 661                 return;
 662
 663         rx_desc = IXGBEVF_RX_DESC(rx_ring, i);
 664         bi = &rx_ring->rx_buffer_info[i];
 665         i -= rx_ring->count;
 666
 667         do {
 668                 if (!ixgbevf_alloc_mapped_page(rx_ring, bi))
 669                         break;
 670
 671                 /* sync the buffer for use by the device */
 672                 dma_sync_single_range_for_device(rx_ring->dev, bi->dma,
 673                                                  bi->page_offset,
 674                                                  ixgbevf_rx_bufsz(rx_ring),
 675                                                  DMA_FROM_DEVICE);
 676
 677                 /* Refresh the desc even if pkt_addr didn't change
 678                  * because each write-back erases this info.
 679                  */
 680                 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma + bi->page_offset);
 681
 682                 rx_desc++;
 683                 bi++;
 684                 i++;
 685                 if (unlikely(!i)) {
 686                         rx_desc = IXGBEVF_RX_DESC(rx_ring, 0);
 687                         bi = rx_ring->rx_buffer_info;
 688                         i -= rx_ring->count;
 689                 }
 690
 691                 /* clear the length for the next_to_use descriptor */
 692                 rx_desc->wb.upper.length = 0;
 693
 694                 cleaned_count--;
 695         } while (cleaned_count);
 696
 697         i += rx_ring->count;
 698
 699         if (rx_ring->next_to_use != i) {
 700                 /* record the next descriptor to use */
 701                 rx_ring->next_to_use = i;
 702
 703                 /* update next to alloc since we have filled the ring */
 704                 rx_ring->next_to_alloc = i;
 705
 706                 /* Force memory writes to complete before letting h/w
 707                  * know there are new descriptors to fetch.  (Only
 708                  * applicable for weak-ordered memory model archs,
 709                  * such as IA-64).
 710                  */
 711                 wmb();
 712                 ixgbevf_write_tail(rx_ring, i);
 713         }
 714 }
 715
 716 /**
 717  * ixgbevf_cleanup_headers - Correct corrupted or empty headers
 718  * @rx_ring: rx descriptor ring packet is being transacted on
 719  * @rx_desc: pointer to the EOP Rx descriptor
 720  * @skb: pointer to current skb being fixed
 721  *
 722  * Check for corrupted packet headers caused by senders on the local L2
 723  * embedded NIC switch not setting up their Tx Descriptors right.  These
 724  * should be very rare.
 725  *
 726  * Also address the case where we are pulling data in on pages only
 727  * and as such no data is present in the skb header.
 728  *
 729  * In addition if skb is not at least 60 bytes we need to pad it so that
 730  * it is large enough to qualify as a valid Ethernet frame.
 731  *
 732  * Returns true if an error was encountered and skb was freed.
 733  **/
 734 static bool ixgbevf_cleanup_headers(struct ixgbevf_ring *rx_ring,
 735                                     union ixgbe_adv_rx_desc *rx_desc,
 736                                     struct sk_buff *skb)
 737 {
 738         /* XDP packets use error pointer so abort at this point */
 739         if (IS_ERR(skb))
 740                 return true;
 741
 742         /* verify that the packet does not have any known errors */
 743         if (unlikely(ixgbevf_test_staterr(rx_desc,
 744                                           IXGBE_RXDADV_ERR_FRAME_ERR_MASK))) {
 745                 struct net_device *netdev = rx_ring->netdev;
 746
 747                 if (!(netdev->features & NETIF_F_RXALL)) {
 748                         dev_kfree_skb_any(skb);
 749                         return true;
 750                 }
 751         }
 752
 753         /* if eth_skb_pad returns an error the skb was freed */
 754         if (eth_skb_pad(skb))
 755                 return true;
 756
 757         return false;
 758 }
 759
 760 /**
 761  * ixgbevf_reuse_rx_page - page flip buffer and store it back on the ring
 762  * @rx_ring: rx descriptor ring to store buffers on
 763  * @old_buff: donor buffer to have page reused
 764  *
 765  * Synchronizes page for reuse by the adapter
 766  **/
 767 static void ixgbevf_reuse_rx_page(struct ixgbevf_ring *rx_ring,
 768                                   struct ixgbevf_rx_buffer *old_buff)
 769 {
 770         struct ixgbevf_rx_buffer *new_buff;
 771         u16 nta = rx_ring->next_to_alloc;
 772
 773         new_buff = &rx_ring->rx_buffer_info[nta];
 774
 775         /* update, and store next to alloc */
 776         nta++;
 777         rx_ring->next_to_alloc = (nta < rx_ring->count) ? nta : 0;
 778
 779         /* transfer page from old buffer to new buffer */
 780         new_buff->page = old_buff->page;
 781         new_buff->dma = old_buff->dma;
 782         new_buff->page_offset = old_buff->page_offset;
 783         new_buff->pagecnt_bias = old_buff->pagecnt_bias;
 784 }
 785
 786 static inline bool ixgbevf_page_is_reserved(struct page *page)
 787 {
 788         return (page_to_nid(page) != numa_mem_id()) || page_is_pfmemalloc(page);
 789 }
 790
 791 static bool ixgbevf_can_reuse_rx_page(struct ixgbevf_rx_buffer *rx_buffer)
 792 {
 793         unsigned int pagecnt_bias = rx_buffer->pagecnt_bias;
 794         struct page *page = rx_buffer->page;
 795
 796         /* avoid re-using remote pages */
 797         if (unlikely(ixgbevf_page_is_reserved(page)))
 798                 return false;
 799
 800 #if (PAGE_SIZE < 8192)
 801         /* if we are only owner of page we can reuse it */
 802         if (unlikely((page_ref_count(page) - pagecnt_bias) > 1))
 803                 return false;
 804 #else
 805 #define IXGBEVF_LAST_OFFSET \
 806         (SKB_WITH_OVERHEAD(PAGE_SIZE) - IXGBEVF_RXBUFFER_2048)
 807
 808         if (rx_buffer->page_offset > IXGBEVF_LAST_OFFSET)
 809                 return false;
 810
 811 #endif
 812
 813         /* If we have drained the page fragment pool we need to update
 814          * the pagecnt_bias and page count so that we fully restock the
 815          * number of references the driver holds.
 816          */
 817         if (unlikely(!pagecnt_bias)) {
 818                 page_ref_add(page, USHRT_MAX);
 819                 rx_buffer->pagecnt_bias = USHRT_MAX;
 820         }
 821
 822         return true;
 823 }
 824
 825 /**
 826  * ixgbevf_add_rx_frag - Add contents of Rx buffer to sk_buff
 827  * @rx_ring: rx descriptor ring to transact packets on
 828  * @rx_buffer: buffer containing page to add
 829  * @skb: sk_buff to place the data into
 830  * @size: size of buffer to be added
 831  *
 832  * This function will add the data contained in rx_buffer->page to the skb.
 833  **/
 834 static void ixgbevf_add_rx_frag(struct ixgbevf_ring *rx_ring,
 835                                 struct ixgbevf_rx_buffer *rx_buffer,
 836                                 struct sk_buff *skb,
 837                                 unsigned int size)
 838 {
 839 #if (PAGE_SIZE < 8192)
 840         unsigned int truesize = ixgbevf_rx_pg_size(rx_ring) / 2;
 841 #else
 842         unsigned int truesize = ring_uses_build_skb(rx_ring) ?
 843                                 SKB_DATA_ALIGN(IXGBEVF_SKB_PAD + size) :
 844                                 SKB_DATA_ALIGN(size);
 845 #endif
 846         skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, rx_buffer->page,
 847                         rx_buffer->page_offset, size, truesize);
 848 #if (PAGE_SIZE < 8192)
 849         rx_buffer->page_offset ^= truesize;
 850 #else
 851         rx_buffer->page_offset += truesize;
 852 #endif
 853 }
 854
 855 static
 856 struct sk_buff *ixgbevf_construct_skb(struct ixgbevf_ring *rx_ring,
 857                                       struct ixgbevf_rx_buffer *rx_buffer,
 858                                       struct xdp_buff *xdp,
 859                                       union ixgbe_adv_rx_desc *rx_desc)
 860 {
 861         unsigned int size = xdp->data_end - xdp->data;
 862 #if (PAGE_SIZE < 8192)
 863         unsigned int truesize = ixgbevf_rx_pg_size(rx_ring) / 2;
 864 #else
 865         unsigned int truesize = SKB_DATA_ALIGN(xdp->data_end -
 866                                                xdp->data_hard_start);
 867 #endif
 868         unsigned int headlen;
 869         struct sk_buff *skb;
 870
 871         /* prefetch first cache line of first page */
 872         prefetch(xdp->data);
 873 #if L1_CACHE_BYTES < 128
 874         prefetch(xdp->data + L1_CACHE_BYTES);
 875 #endif
 876         /* Note, we get here by enabling legacy-rx via:
 877          *
 878          *    ethtool --set-priv-flags <dev> legacy-rx on
 879          *
 880          * In this mode, we currently get 0 extra XDP headroom as
 881          * opposed to having legacy-rx off, where we process XDP
 882          * packets going to stack via ixgbevf_build_skb().
 883          *
 884          * For ixgbevf_construct_skb() mode it means that the
 885          * xdp->data_meta will always point to xdp->data, since
 886          * the helper cannot expand the head. Should this ever
 887          * changed in future for legacy-rx mode on, then lets also
 888          * add xdp->data_meta handling here.
 889          */
 890
 891         /* allocate a skb to store the frags */
 892         skb = napi_alloc_skb(&rx_ring->q_vector->napi, IXGBEVF_RX_HDR_SIZE);
 893         if (unlikely(!skb))
 894                 return NULL;
 895
 896         /* Determine available headroom for copy */
 897         headlen = size;
 898         if (headlen > IXGBEVF_RX_HDR_SIZE)
 899                 headlen = eth_get_headlen(skb->dev, xdp->data,
 900                                           IXGBEVF_RX_HDR_SIZE);
 901
 902         /* align pull length to size of long to optimize memcpy performance */
 903         memcpy(__skb_put(skb, headlen), xdp->data,
 904                ALIGN(headlen, sizeof(long)));
 905
 906         /* update all of the pointers */
 907         size -= headlen;
 908         if (size) {
 909                 skb_add_rx_frag(skb, 0, rx_buffer->page,
 910                                 (xdp->data + headlen) -
 911                                         page_address(rx_buffer->page),
 912                                 size, truesize);
 913 #if (PAGE_SIZE < 8192)
 914                 rx_buffer->page_offset ^= truesize;
 915 #else
 916                 rx_buffer->page_offset += truesize;
 917 #endif
 918         } else {
 919                 rx_buffer->pagecnt_bias++;
 920         }
 921
 922         return skb;
 923 }
 924
 925 static inline void ixgbevf_irq_enable_queues(struct ixgbevf_adapter *adapter,
 926                                              u32 qmask)
 927 {
 928         struct ixgbe_hw *hw = &adapter->hw;
 929
 930         IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, qmask);
 931 }
 932
 933 static struct sk_buff *ixgbevf_build_skb(struct ixgbevf_ring *rx_ring,
 934                                          struct ixgbevf_rx_buffer *rx_buffer,
 935                                          struct xdp_buff *xdp,
 936                                          union ixgbe_adv_rx_desc *rx_desc)
 937 {
 938         unsigned int metasize = xdp->data - xdp->data_meta;
 939 #if (PAGE_SIZE < 8192)
 940         unsigned int truesize = ixgbevf_rx_pg_size(rx_ring) / 2;
 941 #else
 942         unsigned int truesize = SKB_DATA_ALIGN(sizeof(struct skb_shared_info)) +
 943                                 SKB_DATA_ALIGN(xdp->data_end -
 944                                                xdp->data_hard_start);
 945 #endif
 946         struct sk_buff *skb;
 947
 948         /* Prefetch first cache line of first page. If xdp->data_meta
 949          * is unused, this points to xdp->data, otherwise, we likely
 950          * have a consumer accessing first few bytes of meta data,
 951          * and then actual data.
 952          */
 953         prefetch(xdp->data_meta);
 954 #if L1_CACHE_BYTES < 128
 955         prefetch(xdp->data_meta + L1_CACHE_BYTES);
 956 #endif
 957
 958         /* build an skb around the page buffer */
 959         skb = build_skb(xdp->data_hard_start, truesize);
 960         if (unlikely(!skb))
 961                 return NULL;
 962
 963         /* update pointers within the skb to store the data */
 964         skb_reserve(skb, xdp->data - xdp->data_hard_start);
 965         __skb_put(skb, xdp->data_end - xdp->data);
 966         if (metasize)
 967                 skb_metadata_set(skb, metasize);
 968
 969         /* update buffer offset */
 970 #if (PAGE_SIZE < 8192)
 971         rx_buffer->page_offset ^= truesize;
 972 #else
 973         rx_buffer->page_offset += truesize;
 974 #endif
 975
 976         return skb;
 977 }
 978
 979 #define IXGBEVF_XDP_PASS 0
 980 #define IXGBEVF_XDP_CONSUMED 1
 981 #define IXGBEVF_XDP_TX 2
 982
 983 static int ixgbevf_xmit_xdp_ring(struct ixgbevf_ring *ring,
 984                                  struct xdp_buff *xdp)
 985 {
 986         struct ixgbevf_tx_buffer *tx_buffer;
 987         union ixgbe_adv_tx_desc *tx_desc;
 988         u32 len, cmd_type;
 989         dma_addr_t dma;
 990         u16 i;
 991
 992         len = xdp->data_end - xdp->data;
 993
 994         if (unlikely(!ixgbevf_desc_unused(ring)))
 995                 return IXGBEVF_XDP_CONSUMED;
 996
 997         dma = dma_map_single(ring->dev, xdp->data, len, DMA_TO_DEVICE);
 998         if (dma_mapping_error(ring->dev, dma))
 999                 return IXGBEVF_XDP_CONSUMED;
1000
1001         /* record the location of the first descriptor for this packet */
1002         i = ring->next_to_use;
1003         tx_buffer = &ring->tx_buffer_info[i];
1004
1005         dma_unmap_len_set(tx_buffer, len, len);
1006         dma_unmap_addr_set(tx_buffer, dma, dma);
1007         tx_buffer->data = xdp->data;
1008         tx_buffer->bytecount = len;
1009         tx_buffer->gso_segs = 1;
1010         tx_buffer->protocol = 0;
1011
1012         /* Populate minimal context descriptor that will provide for the
1013          * fact that we are expected to process Ethernet frames.
1014          */
1015         if (!test_bit(__IXGBEVF_TX_XDP_RING_PRIMED, &ring->state)) {
1016                 struct ixgbe_adv_tx_context_desc *context_desc;
1017
1018                 set_bit(__IXGBEVF_TX_XDP_RING_PRIMED, &ring->state);
1019
1020                 context_desc = IXGBEVF_TX_CTXTDESC(ring, 0);
1021                 context_desc->vlan_macip_lens   =
1022                         cpu_to_le32(ETH_HLEN << IXGBE_ADVTXD_MACLEN_SHIFT);
1023                 context_desc->fceof_saidx       = 0;
1024                 context_desc->type_tucmd_mlhl   =
1025                         cpu_to_le32(IXGBE_TXD_CMD_DEXT |
1026                                     IXGBE_ADVTXD_DTYP_CTXT);
1027                 context_desc->mss_l4len_idx     = 0;
1028
1029                 i = 1;
1030         }
1031
1032         /* put descriptor type bits */
1033         cmd_type = IXGBE_ADVTXD_DTYP_DATA |
1034                    IXGBE_ADVTXD_DCMD_DEXT |
1035                    IXGBE_ADVTXD_DCMD_IFCS;
1036         cmd_type |= len | IXGBE_TXD_CMD;
1037
1038         tx_desc = IXGBEVF_TX_DESC(ring, i);
1039         tx_desc->read.buffer_addr = cpu_to_le64(dma);
1040
1041         tx_desc->read.cmd_type_len = cpu_to_le32(cmd_type);
1042         tx_desc->read.olinfo_status =
1043                         cpu_to_le32((len << IXGBE_ADVTXD_PAYLEN_SHIFT) |
1044                                     IXGBE_ADVTXD_CC);
1045
1046         /* Avoid any potential race with cleanup */
1047         smp_wmb();
1048
1049         /* set next_to_watch value indicating a packet is present */
1050         i++;
1051         if (i == ring->count)
1052                 i = 0;
1053
1054         tx_buffer->next_to_watch = tx_desc;
1055         ring->next_to_use = i;
1056
1057         return IXGBEVF_XDP_TX;
1058 }
1059
1060 static struct sk_buff *ixgbevf_run_xdp(struct ixgbevf_adapter *adapter,
1061                                        struct ixgbevf_ring  *rx_ring,
1062                                        struct xdp_buff *xdp)
1063 {
1064         int result = IXGBEVF_XDP_PASS;
1065         struct ixgbevf_ring *xdp_ring;
1066         struct bpf_prog *xdp_prog;
1067         u32 act;
1068
1069         rcu_read_lock();
1070         xdp_prog = READ_ONCE(rx_ring->xdp_prog);
1071
1072         if (!xdp_prog)
1073                 goto xdp_out;
1074
1075         act = bpf_prog_run_xdp(xdp_prog, xdp);
1076         switch (act) {
1077         case XDP_PASS:
1078                 break;
1079         case XDP_TX:
1080                 xdp_ring = adapter->xdp_ring[rx_ring->queue_index];
1081                 result = ixgbevf_xmit_xdp_ring(xdp_ring, xdp);
1082                 break;
1083         default:
1084                 bpf_warn_invalid_xdp_action(act);
1085                 /* fallthrough */
1086         case XDP_ABORTED:
1087                 trace_xdp_exception(rx_ring->netdev, xdp_prog, act);
1088                 /* fallthrough -- handle aborts by dropping packet */
1089         case XDP_DROP:
1090                 result = IXGBEVF_XDP_CONSUMED;
1091                 break;
1092         }
1093 xdp_out:
1094         rcu_read_unlock();
1095         return ERR_PTR(-result);
1096 }
1097
1098 static void ixgbevf_rx_buffer_flip(struct ixgbevf_ring *rx_ring,
1099                                    struct ixgbevf_rx_buffer *rx_buffer,
1100                                    unsigned int size)
1101 {
1102 #if (PAGE_SIZE < 8192)
1103         unsigned int truesize = ixgbevf_rx_pg_size(rx_ring) / 2;
1104
1105         rx_buffer->page_offset ^= truesize;
1106 #else
1107         unsigned int truesize = ring_uses_build_skb(rx_ring) ?
1108                                 SKB_DATA_ALIGN(IXGBEVF_SKB_PAD + size) :
1109                                 SKB_DATA_ALIGN(size);
1110
1111         rx_buffer->page_offset += truesize;
1112 #endif
1113 }
1114
1115 static int ixgbevf_clean_rx_irq(struct ixgbevf_q_vector *q_vector,
1116                                 struct ixgbevf_ring *rx_ring,
1117                                 int budget)
1118 {
1119         unsigned int total_rx_bytes = 0, total_rx_packets = 0;
1120         struct ixgbevf_adapter *adapter = q_vector->adapter;
1121         u16 cleaned_count = ixgbevf_desc_unused(rx_ring);
1122         struct sk_buff *skb = rx_ring->skb;
1123         bool xdp_xmit = false;
1124         struct xdp_buff xdp;
1125
1126         xdp.rxq = &rx_ring->xdp_rxq;
1127
1128         while (likely(total_rx_packets < budget)) {
1129                 struct ixgbevf_rx_buffer *rx_buffer;
1130                 union ixgbe_adv_rx_desc *rx_desc;
1131                 unsigned int size;
1132
1133                 /* return some buffers to hardware, one at a time is too slow */
1134                 if (cleaned_count >= IXGBEVF_RX_BUFFER_WRITE) {
1135                         ixgbevf_alloc_rx_buffers(rx_ring, cleaned_count);
1136                         cleaned_count = 0;
1137                 }
1138
1139                 rx_desc = IXGBEVF_RX_DESC(rx_ring, rx_ring->next_to_clean);
1140                 size = le16_to_cpu(rx_desc->wb.upper.length);
1141                 if (!size)
1142                         break;
1143
1144                 /* This memory barrier is needed to keep us from reading
1145                  * any other fields out of the rx_desc until we know the
1146                  * RXD_STAT_DD bit is set
1147                  */
1148                 rmb();
1149
1150                 rx_buffer = ixgbevf_get_rx_buffer(rx_ring, size);
1151
1152                 /* retrieve a buffer from the ring */
1153                 if (!skb) {
1154                         xdp.data = page_address(rx_buffer->page) +
1155                                    rx_buffer->page_offset;
1156                         xdp.data_meta = xdp.data;
1157                         xdp.data_hard_start = xdp.data -
1158                                               ixgbevf_rx_offset(rx_ring);
1159                         xdp.data_end = xdp.data + size;
1160
1161                         skb = ixgbevf_run_xdp(adapter, rx_ring, &xdp);
1162                 }
1163
1164                 if (IS_ERR(skb)) {
1165                         if (PTR_ERR(skb) == -IXGBEVF_XDP_TX) {
1166                                 xdp_xmit = true;
1167                                 ixgbevf_rx_buffer_flip(rx_ring, rx_buffer,
1168                                                        size);
1169                         } else {
1170                                 rx_buffer->pagecnt_bias++;
1171                         }
1172                         total_rx_packets++;
1173                         total_rx_bytes += size;
1174                 } else if (skb) {
1175                         ixgbevf_add_rx_frag(rx_ring, rx_buffer, skb, size);
1176                 } else if (ring_uses_build_skb(rx_ring)) {
1177                         skb = ixgbevf_build_skb(rx_ring, rx_buffer,
1178                                                 &xdp, rx_desc);
1179                 } else {
1180                         skb = ixgbevf_construct_skb(rx_ring, rx_buffer,
1181                                                     &xdp, rx_desc);
1182                 }
1183
1184                 /* exit if we failed to retrieve a buffer */
1185                 if (!skb) {
1186                         rx_ring->rx_stats.alloc_rx_buff_failed++;
1187                         rx_buffer->pagecnt_bias++;
1188                         break;
1189                 }
1190
1191                 ixgbevf_put_rx_buffer(rx_ring, rx_buffer, skb);
1192                 cleaned_count++;
1193
1194                 /* fetch next buffer in frame if non-eop */
1195                 if (ixgbevf_is_non_eop(rx_ring, rx_desc))
1196                         continue;
1197
1198                 /* verify the packet layout is correct */
1199                 if (ixgbevf_cleanup_headers(rx_ring, rx_desc, skb)) {
1200                         skb = NULL;
1201                         continue;
1202                 }
1203
1204                 /* probably a little skewed due to removing CRC */
1205                 total_rx_bytes += skb->len;
1206
1207                 /* Workaround hardware that can't do proper VEPA multicast
1208                  * source pruning.
1209                  */
1210                 if ((skb->pkt_type == PACKET_BROADCAST ||
1211                      skb->pkt_type == PACKET_MULTICAST) &&
1212                     ether_addr_equal(rx_ring->netdev->dev_addr,
1213                                      eth_hdr(skb)->h_source)) {
1214                         dev_kfree_skb_irq(skb);
1215                         continue;
1216                 }
1217
1218                 /* populate checksum, VLAN, and protocol */
1219                 ixgbevf_process_skb_fields(rx_ring, rx_desc, skb);
1220
1221                 ixgbevf_rx_skb(q_vector, skb);
1222
1223                 /* reset skb pointer */
1224                 skb = NULL;
1225
1226                 /* update budget accounting */
1227                 total_rx_packets++;
1228         }
1229
1230         /* place incomplete frames back on ring for completion */
1231         rx_ring->skb = skb;
1232
1233         if (xdp_xmit) {
1234                 struct ixgbevf_ring *xdp_ring =
1235                         adapter->xdp_ring[rx_ring->queue_index];
1236
1237                 /* Force memory writes to complete before letting h/w
1238                  * know there are new descriptors to fetch.
1239                  */
1240                 wmb();
1241                 ixgbevf_write_tail(xdp_ring, xdp_ring->next_to_use);
1242         }
1243
1244         u64_stats_update_begin(&rx_ring->syncp);
1245         rx_ring->stats.packets += total_rx_packets;
1246         rx_ring->stats.bytes += total_rx_bytes;
1247         u64_stats_update_end(&rx_ring->syncp);
1248         q_vector->rx.total_packets += total_rx_packets;
1249         q_vector->rx.total_bytes += total_rx_bytes;
1250
1251         return total_rx_packets;
1252 }
1253
1254 /**
1255  * ixgbevf_poll - NAPI polling calback
1256  * @napi: napi struct with our devices info in it
1257  * @budget: amount of work driver is allowed to do this pass, in packets
1258  *
1259  * This function will clean more than one or more rings associated with a
1260  * q_vector.
1261  **/
1262 static int ixgbevf_poll(struct napi_struct *napi, int budget)
1263 {
1264         struct ixgbevf_q_vector *q_vector =
1265                 container_of(napi, struct ixgbevf_q_vector, napi);
1266         struct ixgbevf_adapter *adapter = q_vector->adapter;
1267         struct ixgbevf_ring *ring;
1268         int per_ring_budget, work_done = 0;
1269         bool clean_complete = true;
1270
1271         ixgbevf_for_each_ring(ring, q_vector->tx) {
1272                 if (!ixgbevf_clean_tx_irq(q_vector, ring, budget))
1273                         clean_complete = false;
1274         }
1275
1276         if (budget <= 0)
1277                 return budget;
1278
1279         /* attempt to distribute budget to each queue fairly, but don't allow
1280          * the budget to go below 1 because we'll exit polling
1281          */
1282         if (q_vector->rx.count > 1)
1283                 per_ring_budget = max(budget/q_vector->rx.count, 1);
1284         else
1285                 per_ring_budget = budget;
1286
1287         ixgbevf_for_each_ring(ring, q_vector->rx) {
1288                 int cleaned = ixgbevf_clean_rx_irq(q_vector, ring,
1289                                                    per_ring_budget);
1290                 work_done += cleaned;
1291                 if (cleaned >= per_ring_budget)
1292                         clean_complete = false;
1293         }
1294
1295         /* If all work not completed, return budget and keep polling */
1296         if (!clean_complete)
1297                 return budget;
1298
1299         /* Exit the polling mode, but don't re-enable interrupts if stack might
1300          * poll us due to busy-polling
1301          */
1302         if (likely(napi_complete_done(napi, work_done))) {
1303                 if (adapter->rx_itr_setting == 1)
1304                         ixgbevf_set_itr(q_vector);
1305                 if (!test_bit(__IXGBEVF_DOWN, &adapter->state) &&
1306                     !test_bit(__IXGBEVF_REMOVING, &adapter->state))
1307                         ixgbevf_irq_enable_queues(adapter,
1308                                                   BIT(q_vector->v_idx));
1309         }
1310
1311         return min(work_done, budget - 1);
1312 }
1313
1314 /**
1315  * ixgbevf_write_eitr - write VTEITR register in hardware specific way
1316  * @q_vector: structure containing interrupt and ring information
1317  **/
1318 void ixgbevf_write_eitr(struct ixgbevf_q_vector *q_vector)
1319 {
1320         struct ixgbevf_adapter *adapter = q_vector->adapter;
1321         struct ixgbe_hw *hw = &adapter->hw;
1322         int v_idx = q_vector->v_idx;
1323         u32 itr_reg = q_vector->itr & IXGBE_MAX_EITR;
1324
1325         /* set the WDIS bit to not clear the timer bits and cause an
1326          * immediate assertion of the interrupt
1327          */
1328         itr_reg |= IXGBE_EITR_CNT_WDIS;
1329
1330         IXGBE_WRITE_REG(hw, IXGBE_VTEITR(v_idx), itr_reg);
1331 }
1332
1333 /**
1334  * ixgbevf_configure_msix - Configure MSI-X hardware
1335  * @adapter: board private structure
1336  *
1337  * ixgbevf_configure_msix sets up the hardware to properly generate MSI-X
1338  * interrupts.
1339  **/
1340 static void ixgbevf_configure_msix(struct ixgbevf_adapter *adapter)
1341 {
1342         struct ixgbevf_q_vector *q_vector;
1343         int q_vectors, v_idx;
1344
1345         q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1346         adapter->eims_enable_mask = 0;
1347
1348         /* Populate the IVAR table and set the ITR values to the
1349          * corresponding register.
1350          */
1351         for (v_idx = 0; v_idx < q_vectors; v_idx++) {
1352                 struct ixgbevf_ring *ring;
1353
1354                 q_vector = adapter->q_vector[v_idx];
1355
1356                 ixgbevf_for_each_ring(ring, q_vector->rx)
1357                         ixgbevf_set_ivar(adapter, 0, ring->reg_idx, v_idx);
1358
1359                 ixgbevf_for_each_ring(ring, q_vector->tx)
1360                         ixgbevf_set_ivar(adapter, 1, ring->reg_idx, v_idx);
1361
1362                 if (q_vector->tx.ring && !q_vector->rx.ring) {
1363                         /* Tx only vector */
1364                         if (adapter->tx_itr_setting == 1)
1365                                 q_vector->itr = IXGBE_12K_ITR;
1366                         else
1367                                 q_vector->itr = adapter->tx_itr_setting;
1368                 } else {
1369                         /* Rx or Rx/Tx vector */
1370                         if (adapter->rx_itr_setting == 1)
1371                                 q_vector->itr = IXGBE_20K_ITR;
1372                         else
1373                                 q_vector->itr = adapter->rx_itr_setting;
1374                 }
1375
1376                 /* add q_vector eims value to global eims_enable_mask */
1377                 adapter->eims_enable_mask |= BIT(v_idx);
1378
1379                 ixgbevf_write_eitr(q_vector);
1380         }
1381
1382         ixgbevf_set_ivar(adapter, -1, 1, v_idx);
1383         /* setup eims_other and add value to global eims_enable_mask */
1384         adapter->eims_other = BIT(v_idx);
1385         adapter->eims_enable_mask |= adapter->eims_other;
1386 }
1387
1388 enum latency_range {
1389         lowest_latency = 0,
1390         low_latency = 1,
1391         bulk_latency = 2,
1392         latency_invalid = 255
1393 };
1394
1395 /**
1396  * ixgbevf_update_itr - update the dynamic ITR value based on statistics
1397  * @q_vector: structure containing interrupt and ring information
1398  * @ring_container: structure containing ring performance data
1399  *
1400  * Stores a new ITR value based on packets and byte
1401  * counts during the last interrupt.  The advantage of per interrupt
1402  * computation is faster updates and more accurate ITR for the current
1403  * traffic pattern.  Constants in this function were computed
1404  * based on theoretical maximum wire speed and thresholds were set based
1405  * on testing data as well as attempting to minimize response time
1406  * while increasing bulk throughput.
1407  **/
1408 static void ixgbevf_update_itr(struct ixgbevf_q_vector *q_vector,
1409                                struct ixgbevf_ring_container *ring_container)
1410 {
1411         int bytes = ring_container->total_bytes;
1412         int packets = ring_container->total_packets;
1413         u32 timepassed_us;
1414         u64 bytes_perint;
1415         u8 itr_setting = ring_container->itr;
1416
1417         if (packets == 0)
1418                 return;
1419
1420         /* simple throttle rate management
1421          *    0-20MB/s lowest (100000 ints/s)
1422          *   20-100MB/s low   (20000 ints/s)
1423          *  100-1249MB/s bulk (12000 ints/s)
1424          */
1425         /* what was last interrupt timeslice? */
1426         timepassed_us = q_vector->itr >> 2;
1427         if (timepassed_us == 0)
1428                 return;
1429
1430         bytes_perint = bytes / timepassed_us; /* bytes/usec */
1431
1432         switch (itr_setting) {
1433         case lowest_latency:
1434                 if (bytes_perint > 10)
1435                         itr_setting = low_latency;
1436                 break;
1437         case low_latency:
1438                 if (bytes_perint > 20)
1439                         itr_setting = bulk_latency;
1440                 else if (bytes_perint <= 10)
1441                         itr_setting = lowest_latency;
1442                 break;
1443         case bulk_latency:
1444                 if (bytes_perint <= 20)
1445                         itr_setting = low_latency;
1446                 break;
1447         }
1448
1449         /* clear work counters since we have the values we need */
1450         ring_container->total_bytes = 0;
1451         ring_container->total_packets = 0;
1452
1453         /* write updated itr to ring container */
1454         ring_container->itr = itr_setting;
1455 }
1456
1457 static void ixgbevf_set_itr(struct ixgbevf_q_vector *q_vector)
1458 {
1459         u32 new_itr = q_vector->itr;
1460         u8 current_itr;
1461
1462         ixgbevf_update_itr(q_vector, &q_vector->tx);
1463         ixgbevf_update_itr(q_vector, &q_vector->rx);
1464
1465         current_itr = max(q_vector->rx.itr, q_vector->tx.itr);
1466
1467         switch (current_itr) {
1468         /* counts and packets in update_itr are dependent on these numbers */
1469         case lowest_latency:
1470                 new_itr = IXGBE_100K_ITR;
1471                 break;
1472         case low_latency:
1473                 new_itr = IXGBE_20K_ITR;
1474                 break;
1475         case bulk_latency:
1476                 new_itr = IXGBE_12K_ITR;
1477                 break;
1478         default:
1479                 break;
1480         }
1481
1482         if (new_itr != q_vector->itr) {
1483                 /* do an exponential smoothing */
1484                 new_itr = (10 * new_itr * q_vector->itr) /
1485                           ((9 * new_itr) + q_vector->itr);
1486
1487                 /* save the algorithm value here */
1488                 q_vector->itr = new_itr;
1489
1490                 ixgbevf_write_eitr(q_vector);
1491         }
1492 }
1493
1494 static irqreturn_t ixgbevf_msix_other(int irq, void *data)
1495 {
1496         struct ixgbevf_adapter *adapter = data;
1497         struct ixgbe_hw *hw = &adapter->hw;
1498
1499         hw->mac.get_link_status = 1;
1500
1501         ixgbevf_service_event_schedule(adapter);
1502
1503         IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, adapter->eims_other);
1504
1505         return IRQ_HANDLED;
1506 }
1507
1508 /**
1509  * ixgbevf_msix_clean_rings - single unshared vector rx clean (all queues)
1510  * @irq: unused
1511  * @data: pointer to our q_vector struct for this interrupt vector
1512  **/
1513 static irqreturn_t ixgbevf_msix_clean_rings(int irq, void *data)
1514 {
1515         struct ixgbevf_q_vector *q_vector = data;
1516
1517         /* EIAM disabled interrupts (on this vector) for us */
1518         if (q_vector->rx.ring || q_vector->tx.ring)
1519                 napi_schedule_irqoff(&q_vector->napi);
1520
1521         return IRQ_HANDLED;
1522 }
1523
1524 /**
1525  * ixgbevf_request_msix_irqs - Initialize MSI-X interrupts
1526  * @adapter: board private structure
1527  *
1528  * ixgbevf_request_msix_irqs allocates MSI-X vectors and requests
1529  * interrupts from the kernel.
1530  **/
1531 static int ixgbevf_request_msix_irqs(struct ixgbevf_adapter *adapter)
1532 {
1533         struct net_device *netdev = adapter->netdev;
1534         int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1535         unsigned int ri = 0, ti = 0;
1536         int vector, err;
1537
1538         for (vector = 0; vector < q_vectors; vector++) {
1539                 struct ixgbevf_q_vector *q_vector = adapter->q_vector[vector];
1540                 struct msix_entry *entry = &adapter->msix_entries[vector];
1541
1542                 if (q_vector->tx.ring && q_vector->rx.ring) {
1543                         snprintf(q_vector->name, sizeof(q_vector->name),
1544                                  "%s-TxRx-%u", netdev->name, ri++);
1545                         ti++;
1546                 } else if (q_vector->rx.ring) {
1547                         snprintf(q_vector->name, sizeof(q_vector->name),
1548                                  "%s-rx-%u", netdev->name, ri++);
1549                 } else if (q_vector->tx.ring) {
1550                         snprintf(q_vector->name, sizeof(q_vector->name),
1551                                  "%s-tx-%u", netdev->name, ti++);
1552                 } else {
1553                         /* skip this unused q_vector */
1554                         continue;
1555                 }
1556                 err = request_irq(entry->vector, &ixgbevf_msix_clean_rings, 0,
1557                                   q_vector->name, q_vector);
1558                 if (err) {
1559                         hw_dbg(&adapter->hw,
1560                                "request_irq failed for MSIX interrupt Error: %d\n",
1561                                err);
1562                         goto free_queue_irqs;
1563                 }
1564         }
1565
1566         err = request_irq(adapter->msix_entries[vector].vector,
1567                           &ixgbevf_msix_other, 0, netdev->name, adapter);
1568         if (err) {
1569                 hw_dbg(&adapter->hw, "request_irq for msix_other failed: %d\n",
1570                        err);
1571                 goto free_queue_irqs;
1572         }
1573
1574         return 0;
1575
1576 free_queue_irqs:
1577         while (vector) {
1578                 vector--;
1579                 free_irq(adapter->msix_entries[vector].vector,
1580                          adapter->q_vector[vector]);
1581         }
1582         /* This failure is non-recoverable - it indicates the system is
1583          * out of MSIX vector resources and the VF driver cannot run
1584          * without them.  Set the number of msix vectors to zero
1585          * indicating that not enough can be allocated.  The error
1586          * will be returned to the user indicating device open failed.
1587          * Any further attempts to force the driver to open will also
1588          * fail.  The only way to recover is to unload the driver and
1589          * reload it again.  If the system has recovered some MSIX
1590          * vectors then it may succeed.
1591          */
1592         adapter->num_msix_vectors = 0;
1593         return err;
1594 }
1595
1596 /**
1597  * ixgbevf_request_irq - initialize interrupts
1598  * @adapter: board private structure
1599  *
1600  * Attempts to configure interrupts using the best available
1601  * capabilities of the hardware and kernel.
1602  **/
1603 static int ixgbevf_request_irq(struct ixgbevf_adapter *adapter)
1604 {
1605         int err = ixgbevf_request_msix_irqs(adapter);
1606
1607         if (err)
1608                 hw_dbg(&adapter->hw, "request_irq failed, Error %d\n", err);
1609
1610         return err;
1611 }
1612
1613 static void ixgbevf_free_irq(struct ixgbevf_adapter *adapter)
1614 {
1615         int i, q_vectors;
1616
1617         if (!adapter->msix_entries)
1618                 return;
1619
1620         q_vectors = adapter->num_msix_vectors;
1621         i = q_vectors - 1;
1622
1623         free_irq(adapter->msix_entries[i].vector, adapter);
1624         i--;
1625
1626         for (; i >= 0; i--) {
1627                 /* free only the irqs that were actually requested */
1628                 if (!adapter->q_vector[i]->rx.ring &&
1629                     !adapter->q_vector[i]->tx.ring)
1630                         continue;
1631
1632                 free_irq(adapter->msix_entries[i].vector,
1633                          adapter->q_vector[i]);
1634         }
1635 }
1636
1637 /**
1638  * ixgbevf_irq_disable - Mask off interrupt generation on the NIC
1639  * @adapter: board private structure
1640  **/
1641 static inline void ixgbevf_irq_disable(struct ixgbevf_adapter *adapter)
1642 {
1643         struct ixgbe_hw *hw = &adapter->hw;
1644         int i;
1645
1646         IXGBE_WRITE_REG(hw, IXGBE_VTEIAM, 0);
1647         IXGBE_WRITE_REG(hw, IXGBE_VTEIMC, ~0);
1648         IXGBE_WRITE_REG(hw, IXGBE_VTEIAC, 0);
1649
1650         IXGBE_WRITE_FLUSH(hw);
1651
1652         for (i = 0; i < adapter->num_msix_vectors; i++)
1653                 synchronize_irq(adapter->msix_entries[i].vector);
1654 }
1655
1656 /**
1657  * ixgbevf_irq_enable - Enable default interrupt generation settings
1658  * @adapter: board private structure
1659  **/
1660 static inline void ixgbevf_irq_enable(struct ixgbevf_adapter *adapter)
1661 {
1662         struct ixgbe_hw *hw = &adapter->hw;
1663
1664         IXGBE_WRITE_REG(hw, IXGBE_VTEIAM, adapter->eims_enable_mask);
1665         IXGBE_WRITE_REG(hw, IXGBE_VTEIAC, adapter->eims_enable_mask);
1666         IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, adapter->eims_enable_mask);
1667 }
1668
1669 /**
1670  * ixgbevf_configure_tx_ring - Configure 82599 VF Tx ring after Reset
1671  * @adapter: board private structure
1672  * @ring: structure containing ring specific data
1673  *
1674  * Configure the Tx descriptor ring after a reset.
1675  **/
1676 static void ixgbevf_configure_tx_ring(struct ixgbevf_adapter *adapter,
1677                                       struct ixgbevf_ring *ring)
1678 {
1679         struct ixgbe_hw *hw = &adapter->hw;
1680         u64 tdba = ring->dma;
1681         int wait_loop = 10;
1682         u32 txdctl = IXGBE_TXDCTL_ENABLE;
1683         u8 reg_idx = ring->reg_idx;
1684
1685         /* disable queue to avoid issues while updating state */
1686         IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(reg_idx), IXGBE_TXDCTL_SWFLSH);
1687         IXGBE_WRITE_FLUSH(hw);
1688
1689         IXGBE_WRITE_REG(hw, IXGBE_VFTDBAL(reg_idx), tdba & DMA_BIT_MASK(32));
1690         IXGBE_WRITE_REG(hw, IXGBE_VFTDBAH(reg_idx), tdba >> 32);
1691         IXGBE_WRITE_REG(hw, IXGBE_VFTDLEN(reg_idx),
1692                         ring->count * sizeof(union ixgbe_adv_tx_desc));
1693
1694         /* disable head writeback */
1695         IXGBE_WRITE_REG(hw, IXGBE_VFTDWBAH(reg_idx), 0);
1696         IXGBE_WRITE_REG(hw, IXGBE_VFTDWBAL(reg_idx), 0);
1697
1698         /* enable relaxed ordering */
1699         IXGBE_WRITE_REG(hw, IXGBE_VFDCA_TXCTRL(reg_idx),
1700                         (IXGBE_DCA_TXCTRL_DESC_RRO_EN |
1701                          IXGBE_DCA_TXCTRL_DATA_RRO_EN));
1702
1703         /* reset head and tail pointers */
1704         IXGBE_WRITE_REG(hw, IXGBE_VFTDH(reg_idx), 0);
1705         IXGBE_WRITE_REG(hw, IXGBE_VFTDT(reg_idx), 0);
1706         ring->tail = adapter->io_addr + IXGBE_VFTDT(reg_idx);
1707
1708         /* reset ntu and ntc to place SW in sync with hardwdare */
1709         ring->next_to_clean = 0;
1710         ring->next_to_use = 0;
1711
1712         /* In order to avoid issues WTHRESH + PTHRESH should always be equal
1713          * to or less than the number of on chip descriptors, which is
1714          * currently 40.
1715          */
1716         txdctl |= (8 << 16);    /* WTHRESH = 8 */
1717
1718         /* Setting PTHRESH to 32 both improves performance */
1719         txdctl |= (1u << 8) |    /* HTHRESH = 1 */
1720                    32;           /* PTHRESH = 32 */
1721
1722         /* reinitialize tx_buffer_info */
1723         memset(ring->tx_buffer_info, 0,
1724                sizeof(struct ixgbevf_tx_buffer) * ring->count);
1725
1726         clear_bit(__IXGBEVF_HANG_CHECK_ARMED, &ring->state);
1727         clear_bit(__IXGBEVF_TX_XDP_RING_PRIMED, &ring->state);
1728
1729         IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(reg_idx), txdctl);
1730
1731         /* poll to verify queue is enabled */
1732         do {
1733                 usleep_range(1000, 2000);
1734                 txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(reg_idx));
1735         }  while (--wait_loop && !(txdctl & IXGBE_TXDCTL_ENABLE));
1736         if (!wait_loop)
1737                 hw_dbg(hw, "Could not enable Tx Queue %d\n", reg_idx);
1738 }
1739
1740 /**
1741  * ixgbevf_configure_tx - Configure 82599 VF Transmit Unit after Reset
1742  * @adapter: board private structure
1743  *
1744  * Configure the Tx unit of the MAC after a reset.
1745  **/
1746 static void ixgbevf_configure_tx(struct ixgbevf_adapter *adapter)
1747 {
1748         u32 i;
1749
1750         /* Setup the HW Tx Head and Tail descriptor pointers */
1751         for (i = 0; i < adapter->num_tx_queues; i++)
1752                 ixgbevf_configure_tx_ring(adapter, adapter->tx_ring[i]);
1753         for (i = 0; i < adapter->num_xdp_queues; i++)
1754                 ixgbevf_configure_tx_ring(adapter, adapter->xdp_ring[i]);
1755 }
1756
1757 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
1758
1759 static void ixgbevf_configure_srrctl(struct ixgbevf_adapter *adapter,
1760                                      struct ixgbevf_ring *ring, int index)
1761 {
1762         struct ixgbe_hw *hw = &adapter->hw;
1763         u32 srrctl;
1764
1765         srrctl = IXGBE_SRRCTL_DROP_EN;
1766
1767         srrctl |= IXGBEVF_RX_HDR_SIZE << IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT;
1768         if (ring_uses_large_buffer(ring))
1769                 srrctl |= IXGBEVF_RXBUFFER_3072 >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1770         else
1771                 srrctl |= IXGBEVF_RXBUFFER_2048 >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1772         srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
1773
1774         IXGBE_WRITE_REG(hw, IXGBE_VFSRRCTL(index), srrctl);
1775 }
1776
1777 static void ixgbevf_setup_psrtype(struct ixgbevf_adapter *adapter)
1778 {
1779         struct ixgbe_hw *hw = &adapter->hw;
1780
1781         /* PSRTYPE must be initialized in 82599 */
1782         u32 psrtype = IXGBE_PSRTYPE_TCPHDR | IXGBE_PSRTYPE_UDPHDR |
1783                       IXGBE_PSRTYPE_IPV4HDR | IXGBE_PSRTYPE_IPV6HDR |
1784                       IXGBE_PSRTYPE_L2HDR;
1785
1786         if (adapter->num_rx_queues > 1)
1787                 psrtype |= BIT(29);
1788
1789         IXGBE_WRITE_REG(hw, IXGBE_VFPSRTYPE, psrtype);
1790 }
1791
1792 #define IXGBEVF_MAX_RX_DESC_POLL 10
1793 static void ixgbevf_disable_rx_queue(struct ixgbevf_adapter *adapter,
1794                                      struct ixgbevf_ring *ring)
1795 {
1796         struct ixgbe_hw *hw = &adapter->hw;
1797         int wait_loop = IXGBEVF_MAX_RX_DESC_POLL;
1798         u32 rxdctl;
1799         u8 reg_idx = ring->reg_idx;
1800
1801         if (IXGBE_REMOVED(hw->hw_addr))
1802                 return;
1803         rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));
1804         rxdctl &= ~IXGBE_RXDCTL_ENABLE;
1805
1806         /* write value back with RXDCTL.ENABLE bit cleared */
1807         IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(reg_idx), rxdctl);
1808
1809         /* the hardware may take up to 100us to really disable the Rx queue */
1810         do {
1811                 udelay(10);
1812                 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));
1813         } while (--wait_loop && (rxdctl & IXGBE_RXDCTL_ENABLE));
1814
1815         if (!wait_loop)
1816                 pr_err("RXDCTL.ENABLE queue %d not cleared while polling\n",
1817                        reg_idx);
1818 }
1819
1820 static void ixgbevf_rx_desc_queue_enable(struct ixgbevf_adapter *adapter,
1821                                          struct ixgbevf_ring *ring)
1822 {
1823         struct ixgbe_hw *hw = &adapter->hw;
1824         int wait_loop = IXGBEVF_MAX_RX_DESC_POLL;
1825         u32 rxdctl;
1826         u8 reg_idx = ring->reg_idx;
1827
1828         if (IXGBE_REMOVED(hw->hw_addr))
1829                 return;
1830         do {
1831                 usleep_range(1000, 2000);
1832                 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));
1833         } while (--wait_loop && !(rxdctl & IXGBE_RXDCTL_ENABLE));
1834
1835         if (!wait_loop)
1836                 pr_err("RXDCTL.ENABLE queue %d not set while polling\n",
1837                        reg_idx);
1838 }
1839
1840 /**
1841  * ixgbevf_init_rss_key - Initialize adapter RSS key
1842  * @adapter: device handle
1843  *
1844  * Allocates and initializes the RSS key if it is not allocated.
1845  **/
1846 static inline int ixgbevf_init_rss_key(struct ixgbevf_adapter *adapter)
1847 {
1848         u32 *rss_key;
1849
1850         if (!adapter->rss_key) {
1851                 rss_key = kzalloc(IXGBEVF_RSS_HASH_KEY_SIZE, GFP_KERNEL);
1852                 if (unlikely(!rss_key))
1853                         return -ENOMEM;
1854
1855                 netdev_rss_key_fill(rss_key, IXGBEVF_RSS_HASH_KEY_SIZE);
1856                 adapter->rss_key = rss_key;
1857         }
1858
1859         return 0;
1860 }
1861
1862 static void ixgbevf_setup_vfmrqc(struct ixgbevf_adapter *adapter)
1863 {
1864         struct ixgbe_hw *hw = &adapter->hw;
1865         u32 vfmrqc = 0, vfreta = 0;
1866         u16 rss_i = adapter->num_rx_queues;
1867         u8 i, j;
1868
1869         /* Fill out hash function seeds */
1870         for (i = 0; i < IXGBEVF_VFRSSRK_REGS; i++)
1871                 IXGBE_WRITE_REG(hw, IXGBE_VFRSSRK(i), *(adapter->rss_key + i));
1872
1873         for (i = 0, j = 0; i < IXGBEVF_X550_VFRETA_SIZE; i++, j++) {
1874                 if (j == rss_i)
1875                         j = 0;
1876
1877                 adapter->rss_indir_tbl[i] = j;
1878
1879                 vfreta |= j << (i & 0x3) * 8;
1880                 if ((i & 3) == 3) {
1881                         IXGBE_WRITE_REG(hw, IXGBE_VFRETA(i >> 2), vfreta);
1882                         vfreta = 0;
1883                 }
1884         }
1885
1886         /* Perform hash on these packet types */
1887         vfmrqc |= IXGBE_VFMRQC_RSS_FIELD_IPV4 |
1888                 IXGBE_VFMRQC_RSS_FIELD_IPV4_TCP |
1889                 IXGBE_VFMRQC_RSS_FIELD_IPV6 |
1890                 IXGBE_VFMRQC_RSS_FIELD_IPV6_TCP;
1891
1892         vfmrqc |= IXGBE_VFMRQC_RSSEN;
1893
1894         IXGBE_WRITE_REG(hw, IXGBE_VFMRQC, vfmrqc);
1895 }
1896
1897 static void ixgbevf_configure_rx_ring(struct ixgbevf_adapter *adapter,
1898                                       struct ixgbevf_ring *ring)
1899 {
1900         struct ixgbe_hw *hw = &adapter->hw;
1901         union ixgbe_adv_rx_desc *rx_desc;
1902         u64 rdba = ring->dma;
1903         u32 rxdctl;
1904         u8 reg_idx = ring->reg_idx;
1905
1906         /* disable queue to avoid issues while updating state */
1907         rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));
1908         ixgbevf_disable_rx_queue(adapter, ring);
1909
1910         IXGBE_WRITE_REG(hw, IXGBE_VFRDBAL(reg_idx), rdba & DMA_BIT_MASK(32));
1911         IXGBE_WRITE_REG(hw, IXGBE_VFRDBAH(reg_idx), rdba >> 32);
1912         IXGBE_WRITE_REG(hw, IXGBE_VFRDLEN(reg_idx),
1913                         ring->count * sizeof(union ixgbe_adv_rx_desc));
1914
1915 #ifndef CONFIG_SPARC
1916         /* enable relaxed ordering */
1917         IXGBE_WRITE_REG(hw, IXGBE_VFDCA_RXCTRL(reg_idx),
1918                         IXGBE_DCA_RXCTRL_DESC_RRO_EN);
1919 #else
1920         IXGBE_WRITE_REG(hw, IXGBE_VFDCA_RXCTRL(reg_idx),
1921                         IXGBE_DCA_RXCTRL_DESC_RRO_EN |
1922                         IXGBE_DCA_RXCTRL_DATA_WRO_EN);
1923 #endif
1924
1925         /* reset head and tail pointers */
1926         IXGBE_WRITE_REG(hw, IXGBE_VFRDH(reg_idx), 0);
1927         IXGBE_WRITE_REG(hw, IXGBE_VFRDT(reg_idx), 0);
1928         ring->tail = adapter->io_addr + IXGBE_VFRDT(reg_idx);
1929
1930         /* initialize rx_buffer_info */
1931         memset(ring->rx_buffer_info, 0,
1932                sizeof(struct ixgbevf_rx_buffer) * ring->count);
1933
1934         /* initialize Rx descriptor 0 */
1935         rx_desc = IXGBEVF_RX_DESC(ring, 0);
1936         rx_desc->wb.upper.length = 0;
1937
1938         /* reset ntu and ntc to place SW in sync with hardwdare */
1939         ring->next_to_clean = 0;
1940         ring->next_to_use = 0;
1941         ring->next_to_alloc = 0;
1942
1943         ixgbevf_configure_srrctl(adapter, ring, reg_idx);
1944
1945         /* RXDCTL.RLPML does not work on 82599 */
1946         if (adapter->hw.mac.type != ixgbe_mac_82599_vf) {
1947                 rxdctl &= ~(IXGBE_RXDCTL_RLPMLMASK |
1948                             IXGBE_RXDCTL_RLPML_EN);
1949
1950 #if (PAGE_SIZE < 8192)
1951                 /* Limit the maximum frame size so we don't overrun the skb */
1952                 if (ring_uses_build_skb(ring) &&
1953                     !ring_uses_large_buffer(ring))
1954                         rxdctl |= IXGBEVF_MAX_FRAME_BUILD_SKB |
1955                                   IXGBE_RXDCTL_RLPML_EN;
1956 #endif
1957         }
1958
1959         rxdctl |= IXGBE_RXDCTL_ENABLE | IXGBE_RXDCTL_VME;
1960         IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(reg_idx), rxdctl);
1961
1962         ixgbevf_rx_desc_queue_enable(adapter, ring);
1963         ixgbevf_alloc_rx_buffers(ring, ixgbevf_desc_unused(ring));
1964 }
1965
1966 static void ixgbevf_set_rx_buffer_len(struct ixgbevf_adapter *adapter,
1967                                       struct ixgbevf_ring *rx_ring)
1968 {
1969         struct net_device *netdev = adapter->netdev;
1970         unsigned int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1971
1972         /* set build_skb and buffer size flags */
1973         clear_ring_build_skb_enabled(rx_ring);
1974         clear_ring_uses_large_buffer(rx_ring);
1975
1976         if (adapter->flags & IXGBEVF_FLAGS_LEGACY_RX)
1977                 return;
1978
1979         set_ring_build_skb_enabled(rx_ring);
1980
1981         if (PAGE_SIZE < 8192) {
1982                 if (max_frame <= IXGBEVF_MAX_FRAME_BUILD_SKB)
1983                         return;
1984
1985                 set_ring_uses_large_buffer(rx_ring);
1986         }
1987 }
1988
1989 /**
1990  * ixgbevf_configure_rx - Configure 82599 VF Receive Unit after Reset
1991  * @adapter: board private structure
1992  *
1993  * Configure the Rx unit of the MAC after a reset.
1994  **/
1995 static void ixgbevf_configure_rx(struct ixgbevf_adapter *adapter)
1996 {
1997         struct ixgbe_hw *hw = &adapter->hw;
1998         struct net_device *netdev = adapter->netdev;
1999         int i, ret;
2000
2001         ixgbevf_setup_psrtype(adapter);
2002         if (hw->mac.type >= ixgbe_mac_X550_vf)
2003                 ixgbevf_setup_vfmrqc(adapter);
2004
2005         spin_lock_bh(&adapter->mbx_lock);
2006         /* notify the PF of our intent to use this size of frame */
2007         ret = hw->mac.ops.set_rlpml(hw, netdev->mtu + ETH_HLEN + ETH_FCS_LEN);
2008         spin_unlock_bh(&adapter->mbx_lock);
2009         if (ret)
2010                 dev_err(&adapter->pdev->dev,
2011                         "Failed to set MTU at %d\n", netdev->mtu);
2012
2013         /* Setup the HW Rx Head and Tail Descriptor Pointers and
2014          * the Base and Length of the Rx Descriptor Ring
2015          */
2016         for (i = 0; i < adapter->num_rx_queues; i++) {
2017                 struct ixgbevf_ring *rx_ring = adapter->rx_ring[i];
2018
2019                 ixgbevf_set_rx_buffer_len(adapter, rx_ring);
2020                 ixgbevf_configure_rx_ring(adapter, rx_ring);
2021         }
2022 }
2023
2024 static int ixgbevf_vlan_rx_add_vid(struct net_device *netdev,
2025                                    __be16 proto, u16 vid)
2026 {
2027         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2028         struct ixgbe_hw *hw = &adapter->hw;
2029         int err;
2030
2031         spin_lock_bh(&adapter->mbx_lock);
2032
2033         /* add VID to filter table */
2034         err = hw->mac.ops.set_vfta(hw, vid, 0, true);
2035
2036         spin_unlock_bh(&adapter->mbx_lock);
2037
2038         /* translate error return types so error makes sense */
2039         if (err == IXGBE_ERR_MBX)
2040                 return -EIO;
2041
2042         if (err == IXGBE_ERR_INVALID_ARGUMENT)
2043                 return -EACCES;
2044
2045         set_bit(vid, adapter->active_vlans);
2046
2047         return err;
2048 }
2049
2050 static int ixgbevf_vlan_rx_kill_vid(struct net_device *netdev,
2051                                     __be16 proto, u16 vid)
2052 {
2053         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2054         struct ixgbe_hw *hw = &adapter->hw;
2055         int err;
2056
2057         spin_lock_bh(&adapter->mbx_lock);
2058
2059         /* remove VID from filter table */
2060         err = hw->mac.ops.set_vfta(hw, vid, 0, false);
2061
2062         spin_unlock_bh(&adapter->mbx_lock);
2063
2064         clear_bit(vid, adapter->active_vlans);
2065
2066         return err;
2067 }
2068
2069 static void ixgbevf_restore_vlan(struct ixgbevf_adapter *adapter)
2070 {
2071         u16 vid;
2072
2073         for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
2074                 ixgbevf_vlan_rx_add_vid(adapter->netdev,
2075                                         htons(ETH_P_8021Q), vid);
2076 }
2077
2078 static int ixgbevf_write_uc_addr_list(struct net_device *netdev)
2079 {
2080         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2081         struct ixgbe_hw *hw = &adapter->hw;
2082         int count = 0;
2083
2084         if ((netdev_uc_count(netdev)) > 10) {
2085                 pr_err("Too many unicast filters - No Space\n");
2086                 return -ENOSPC;
2087         }
2088
2089         if (!netdev_uc_empty(netdev)) {
2090                 struct netdev_hw_addr *ha;
2091
2092                 netdev_for_each_uc_addr(ha, netdev) {
2093                         hw->mac.ops.set_uc_addr(hw, ++count, ha->addr);
2094                         udelay(200);
2095                 }
2096         } else {
2097                 /* If the list is empty then send message to PF driver to
2098                  * clear all MAC VLANs on this VF.
2099                  */
2100                 hw->mac.ops.set_uc_addr(hw, 0, NULL);
2101         }
2102
2103         return count;
2104 }
2105
2106 /**
2107  * ixgbevf_set_rx_mode - Multicast and unicast set
2108  * @netdev: network interface device structure
2109  *
2110  * The set_rx_method entry point is called whenever the multicast address
2111  * list, unicast address list or the network interface flags are updated.
2112  * This routine is responsible for configuring the hardware for proper
2113  * multicast mode and configuring requested unicast filters.
2114  **/
2115 static void ixgbevf_set_rx_mode(struct net_device *netdev)
2116 {
2117         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2118         struct ixgbe_hw *hw = &adapter->hw;
2119         unsigned int flags = netdev->flags;
2120         int xcast_mode;
2121
2122         /* request the most inclusive mode we need */
2123         if (flags & IFF_PROMISC)
2124                 xcast_mode = IXGBEVF_XCAST_MODE_PROMISC;
2125         else if (flags & IFF_ALLMULTI)
2126                 xcast_mode = IXGBEVF_XCAST_MODE_ALLMULTI;
2127         else if (flags & (IFF_BROADCAST | IFF_MULTICAST))
2128                 xcast_mode = IXGBEVF_XCAST_MODE_MULTI;
2129         else
2130                 xcast_mode = IXGBEVF_XCAST_MODE_NONE;
2131
2132         spin_lock_bh(&adapter->mbx_lock);
2133
2134         hw->mac.ops.update_xcast_mode(hw, xcast_mode);
2135
2136         /* reprogram multicast list */
2137         hw->mac.ops.update_mc_addr_list(hw, netdev);
2138
2139         ixgbevf_write_uc_addr_list(netdev);
2140
2141         spin_unlock_bh(&adapter->mbx_lock);
2142 }
2143
2144 static void ixgbevf_napi_enable_all(struct ixgbevf_adapter *adapter)
2145 {
2146         int q_idx;
2147         struct ixgbevf_q_vector *q_vector;
2148         int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2149
2150         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
2151                 q_vector = adapter->q_vector[q_idx];
2152                 napi_enable(&q_vector->napi);
2153         }
2154 }
2155
2156 static void ixgbevf_napi_disable_all(struct ixgbevf_adapter *adapter)
2157 {
2158         int q_idx;
2159         struct ixgbevf_q_vector *q_vector;
2160         int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2161
2162         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
2163                 q_vector = adapter->q_vector[q_idx];
2164                 napi_disable(&q_vector->napi);
2165         }
2166 }
2167
2168 static int ixgbevf_configure_dcb(struct ixgbevf_adapter *adapter)
2169 {
2170         struct ixgbe_hw *hw = &adapter->hw;
2171         unsigned int def_q = 0;
2172         unsigned int num_tcs = 0;
2173         unsigned int num_rx_queues = adapter->num_rx_queues;
2174         unsigned int num_tx_queues = adapter->num_tx_queues;
2175         int err;
2176
2177         spin_lock_bh(&adapter->mbx_lock);
2178
2179         /* fetch queue configuration from the PF */
2180         err = ixgbevf_get_queues(hw, &num_tcs, &def_q);
2181
2182         spin_unlock_bh(&adapter->mbx_lock);
2183
2184         if (err)
2185                 return err;
2186
2187         if (num_tcs > 1) {
2188                 /* we need only one Tx queue */
2189                 num_tx_queues = 1;
2190
2191                 /* update default Tx ring register index */
2192                 adapter->tx_ring[0]->reg_idx = def_q;
2193
2194                 /* we need as many queues as traffic classes */
2195                 num_rx_queues = num_tcs;
2196         }
2197
2198         /* if we have a bad config abort request queue reset */
2199         if ((adapter->num_rx_queues != num_rx_queues) ||
2200             (adapter->num_tx_queues != num_tx_queues)) {
2201                 /* force mailbox timeout to prevent further messages */
2202                 hw->mbx.timeout = 0;
2203
2204                 /* wait for watchdog to come around and bail us out */
2205                 set_bit(__IXGBEVF_QUEUE_RESET_REQUESTED, &adapter->state);
2206         }
2207
2208         return 0;
2209 }
2210
2211 static void ixgbevf_configure(struct ixgbevf_adapter *adapter)
2212 {
2213         ixgbevf_configure_dcb(adapter);
2214
2215         ixgbevf_set_rx_mode(adapter->netdev);
2216
2217         ixgbevf_restore_vlan(adapter);
2218         ixgbevf_ipsec_restore(adapter);
2219
2220         ixgbevf_configure_tx(adapter);
2221         ixgbevf_configure_rx(adapter);
2222 }
2223
2224 static void ixgbevf_save_reset_stats(struct ixgbevf_adapter *adapter)
2225 {
2226         /* Only save pre-reset stats if there are some */
2227         if (adapter->stats.vfgprc || adapter->stats.vfgptc) {
2228                 adapter->stats.saved_reset_vfgprc += adapter->stats.vfgprc -
2229                         adapter->stats.base_vfgprc;
2230                 adapter->stats.saved_reset_vfgptc += adapter->stats.vfgptc -
2231                         adapter->stats.base_vfgptc;
2232                 adapter->stats.saved_reset_vfgorc += adapter->stats.vfgorc -
2233                         adapter->stats.base_vfgorc;
2234                 adapter->stats.saved_reset_vfgotc += adapter->stats.vfgotc -
2235                         adapter->stats.base_vfgotc;
2236                 adapter->stats.saved_reset_vfmprc += adapter->stats.vfmprc -
2237                         adapter->stats.base_vfmprc;
2238         }
2239 }
2240
2241 static void ixgbevf_init_last_counter_stats(struct ixgbevf_adapter *adapter)
2242 {
2243         struct ixgbe_hw *hw = &adapter->hw;
2244
2245         adapter->stats.last_vfgprc = IXGBE_READ_REG(hw, IXGBE_VFGPRC);
2246         adapter->stats.last_vfgorc = IXGBE_READ_REG(hw, IXGBE_VFGORC_LSB);
2247         adapter->stats.last_vfgorc |=
2248                 (((u64)(IXGBE_READ_REG(hw, IXGBE_VFGORC_MSB))) << 32);
2249         adapter->stats.last_vfgptc = IXGBE_READ_REG(hw, IXGBE_VFGPTC);
2250         adapter->stats.last_vfgotc = IXGBE_READ_REG(hw, IXGBE_VFGOTC_LSB);
2251         adapter->stats.last_vfgotc |=
2252                 (((u64)(IXGBE_READ_REG(hw, IXGBE_VFGOTC_MSB))) << 32);
2253         adapter->stats.last_vfmprc = IXGBE_READ_REG(hw, IXGBE_VFMPRC);
2254
2255         adapter->stats.base_vfgprc = adapter->stats.last_vfgprc;
2256         adapter->stats.base_vfgorc = adapter->stats.last_vfgorc;
2257         adapter->stats.base_vfgptc = adapter->stats.last_vfgptc;
2258         adapter->stats.base_vfgotc = adapter->stats.last_vfgotc;
2259         adapter->stats.base_vfmprc = adapter->stats.last_vfmprc;
2260 }
2261
2262 static void ixgbevf_negotiate_api(struct ixgbevf_adapter *adapter)
2263 {
2264         struct ixgbe_hw *hw = &adapter->hw;
2265         int api[] = { ixgbe_mbox_api_14,
2266                       ixgbe_mbox_api_13,
2267                       ixgbe_mbox_api_12,
2268                       ixgbe_mbox_api_11,
2269                       ixgbe_mbox_api_10,
2270                       ixgbe_mbox_api_unknown };
2271         int err, idx = 0;
2272
2273         spin_lock_bh(&adapter->mbx_lock);
2274
2275         while (api[idx] != ixgbe_mbox_api_unknown) {
2276                 err = hw->mac.ops.negotiate_api_version(hw, api[idx]);
2277                 if (!err)
2278                         break;
2279                 idx++;
2280         }
2281
2282         spin_unlock_bh(&adapter->mbx_lock);
2283 }
2284
2285 static void ixgbevf_up_complete(struct ixgbevf_adapter *adapter)
2286 {
2287         struct net_device *netdev = adapter->netdev;
2288         struct ixgbe_hw *hw = &adapter->hw;
2289
2290         ixgbevf_configure_msix(adapter);
2291
2292         spin_lock_bh(&adapter->mbx_lock);
2293
2294         if (is_valid_ether_addr(hw->mac.addr))
2295                 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0);
2296         else
2297                 hw->mac.ops.set_rar(hw, 0, hw->mac.perm_addr, 0);
2298
2299         spin_unlock_bh(&adapter->mbx_lock);
2300
2301         smp_mb__before_atomic();
2302         clear_bit(__IXGBEVF_DOWN, &adapter->state);
2303         ixgbevf_napi_enable_all(adapter);
2304
2305         /* clear any pending interrupts, may auto mask */
2306         IXGBE_READ_REG(hw, IXGBE_VTEICR);
2307         ixgbevf_irq_enable(adapter);
2308
2309         /* enable transmits */
2310         netif_tx_start_all_queues(netdev);
2311
2312         ixgbevf_save_reset_stats(adapter);
2313         ixgbevf_init_last_counter_stats(adapter);
2314
2315         hw->mac.get_link_status = 1;
2316         mod_timer(&adapter->service_timer, jiffies);
2317 }
2318
2319 void ixgbevf_up(struct ixgbevf_adapter *adapter)
2320 {
2321         ixgbevf_configure(adapter);
2322
2323         ixgbevf_up_complete(adapter);
2324 }
2325
2326 /**
2327  * ixgbevf_clean_rx_ring - Free Rx Buffers per Queue
2328  * @rx_ring: ring to free buffers from
2329  **/
2330 static void ixgbevf_clean_rx_ring(struct ixgbevf_ring *rx_ring)
2331 {
2332         u16 i = rx_ring->next_to_clean;
2333
2334         /* Free Rx ring sk_buff */
2335         if (rx_ring->skb) {
2336                 dev_kfree_skb(rx_ring->skb);
2337                 rx_ring->skb = NULL;
2338         }
2339
2340         /* Free all the Rx ring pages */
2341         while (i != rx_ring->next_to_alloc) {
2342                 struct ixgbevf_rx_buffer *rx_buffer;
2343
2344                 rx_buffer = &rx_ring->rx_buffer_info[i];
2345
2346                 /* Invalidate cache lines that may have been written to by
2347                  * device so that we avoid corrupting memory.
2348                  */
2349                 dma_sync_single_range_for_cpu(rx_ring->dev,
2350                                               rx_buffer->dma,
2351                                               rx_buffer->page_offset,
2352                                               ixgbevf_rx_bufsz(rx_ring),
2353                                               DMA_FROM_DEVICE);
2354
2355                 /* free resources associated with mapping */
2356                 dma_unmap_page_attrs(rx_ring->dev,
2357                                      rx_buffer->dma,
2358                                      ixgbevf_rx_pg_size(rx_ring),
2359                                      DMA_FROM_DEVICE,
2360                                      IXGBEVF_RX_DMA_ATTR);
2361
2362                 __page_frag_cache_drain(rx_buffer->page,
2363                                         rx_buffer->pagecnt_bias);
2364
2365                 i++;
2366                 if (i == rx_ring->count)
2367                         i = 0;
2368         }
2369
2370         rx_ring->next_to_alloc = 0;
2371         rx_ring->next_to_clean = 0;
2372         rx_ring->next_to_use = 0;
2373 }
2374
2375 /**
2376  * ixgbevf_clean_tx_ring - Free Tx Buffers
2377  * @tx_ring: ring to be cleaned
2378  **/
2379 static void ixgbevf_clean_tx_ring(struct ixgbevf_ring *tx_ring)
2380 {
2381         u16 i = tx_ring->next_to_clean;
2382         struct ixgbevf_tx_buffer *tx_buffer = &tx_ring->tx_buffer_info[i];
2383
2384         while (i != tx_ring->next_to_use) {
2385                 union ixgbe_adv_tx_desc *eop_desc, *tx_desc;
2386
2387                 /* Free all the Tx ring sk_buffs */
2388                 if (ring_is_xdp(tx_ring))
2389                         page_frag_free(tx_buffer->data);
2390                 else
2391                         dev_kfree_skb_any(tx_buffer->skb);
2392
2393                 /* unmap skb header data */
2394                 dma_unmap_single(tx_ring->dev,
2395                                  dma_unmap_addr(tx_buffer, dma),
2396                                  dma_unmap_len(tx_buffer, len),
2397                                  DMA_TO_DEVICE);
2398
2399                 /* check for eop_desc to determine the end of the packet */
2400                 eop_desc = tx_buffer->next_to_watch;
2401                 tx_desc = IXGBEVF_TX_DESC(tx_ring, i);
2402
2403                 /* unmap remaining buffers */
2404                 while (tx_desc != eop_desc) {
2405                         tx_buffer++;
2406                         tx_desc++;
2407                         i++;
2408                         if (unlikely(i == tx_ring->count)) {
2409                                 i = 0;
2410                                 tx_buffer = tx_ring->tx_buffer_info;
2411                                 tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);
2412                         }
2413
2414                         /* unmap any remaining paged data */
2415                         if (dma_unmap_len(tx_buffer, len))
2416                                 dma_unmap_page(tx_ring->dev,
2417                                                dma_unmap_addr(tx_buffer, dma),
2418                                                dma_unmap_len(tx_buffer, len),
2419                                                DMA_TO_DEVICE);
2420                 }
2421
2422                 /* move us one more past the eop_desc for start of next pkt */
2423                 tx_buffer++;
2424                 i++;
2425                 if (unlikely(i == tx_ring->count)) {
2426                         i = 0;
2427                         tx_buffer = tx_ring->tx_buffer_info;
2428                 }
2429         }
2430
2431         /* reset next_to_use and next_to_clean */
2432         tx_ring->next_to_use = 0;
2433         tx_ring->next_to_clean = 0;
2434
2435 }
2436
2437 /**
2438  * ixgbevf_clean_all_rx_rings - Free Rx Buffers for all queues
2439  * @adapter: board private structure
2440  **/
2441 static void ixgbevf_clean_all_rx_rings(struct ixgbevf_adapter *adapter)
2442 {
2443         int i;
2444
2445         for (i = 0; i < adapter->num_rx_queues; i++)
2446                 ixgbevf_clean_rx_ring(adapter->rx_ring[i]);
2447 }
2448
2449 /**
2450  * ixgbevf_clean_all_tx_rings - Free Tx Buffers for all queues
2451  * @adapter: board private structure
2452  **/
2453 static void ixgbevf_clean_all_tx_rings(struct ixgbevf_adapter *adapter)
2454 {
2455         int i;
2456
2457         for (i = 0; i < adapter->num_tx_queues; i++)
2458                 ixgbevf_clean_tx_ring(adapter->tx_ring[i]);
2459         for (i = 0; i < adapter->num_xdp_queues; i++)
2460                 ixgbevf_clean_tx_ring(adapter->xdp_ring[i]);
2461 }
2462
2463 void ixgbevf_down(struct ixgbevf_adapter *adapter)
2464 {
2465         struct net_device *netdev = adapter->netdev;
2466         struct ixgbe_hw *hw = &adapter->hw;
2467         int i;
2468
2469         /* signal that we are down to the interrupt handler */
2470         if (test_and_set_bit(__IXGBEVF_DOWN, &adapter->state))
2471                 return; /* do nothing if already down */
2472
2473         /* disable all enabled Rx queues */
2474         for (i = 0; i < adapter->num_rx_queues; i++)
2475                 ixgbevf_disable_rx_queue(adapter, adapter->rx_ring[i]);
2476
2477         usleep_range(10000, 20000);
2478
2479         netif_tx_stop_all_queues(netdev);
2480
2481         /* call carrier off first to avoid false dev_watchdog timeouts */
2482         netif_carrier_off(netdev);
2483         netif_tx_disable(netdev);
2484
2485         ixgbevf_irq_disable(adapter);
2486
2487         ixgbevf_napi_disable_all(adapter);
2488
2489         del_timer_sync(&adapter->service_timer);
2490
2491         /* disable transmits in the hardware now that interrupts are off */
2492         for (i = 0; i < adapter->num_tx_queues; i++) {
2493                 u8 reg_idx = adapter->tx_ring[i]->reg_idx;
2494
2495                 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(reg_idx),
2496                                 IXGBE_TXDCTL_SWFLSH);
2497         }
2498
2499         for (i = 0; i < adapter->num_xdp_queues; i++) {
2500                 u8 reg_idx = adapter->xdp_ring[i]->reg_idx;
2501
2502                 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(reg_idx),
2503                                 IXGBE_TXDCTL_SWFLSH);
2504         }
2505
2506         if (!pci_channel_offline(adapter->pdev))
2507                 ixgbevf_reset(adapter);
2508
2509         ixgbevf_clean_all_tx_rings(adapter);
2510         ixgbevf_clean_all_rx_rings(adapter);
2511 }
2512
2513 void ixgbevf_reinit_locked(struct ixgbevf_adapter *adapter)
2514 {
2515         WARN_ON(in_interrupt());
2516
2517         while (test_and_set_bit(__IXGBEVF_RESETTING, &adapter->state))
2518                 msleep(1);
2519
2520         ixgbevf_down(adapter);
2521         ixgbevf_up(adapter);
2522
2523         clear_bit(__IXGBEVF_RESETTING, &adapter->state);
2524 }
2525
2526 void ixgbevf_reset(struct ixgbevf_adapter *adapter)
2527 {
2528         struct ixgbe_hw *hw = &adapter->hw;
2529         struct net_device *netdev = adapter->netdev;
2530
2531         if (hw->mac.ops.reset_hw(hw)) {
2532                 hw_dbg(hw, "PF still resetting\n");
2533         } else {
2534                 hw->mac.ops.init_hw(hw);
2535                 ixgbevf_negotiate_api(adapter);
2536         }
2537
2538         if (is_valid_ether_addr(adapter->hw.mac.addr)) {
2539                 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
2540                 ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
2541         }
2542
2543         adapter->last_reset = jiffies;
2544 }
2545
2546 static int ixgbevf_acquire_msix_vectors(struct ixgbevf_adapter *adapter,
2547                                         int vectors)
2548 {
2549         int vector_threshold;
2550
2551         /* We'll want at least 2 (vector_threshold):
2552          * 1) TxQ[0] + RxQ[0] handler
2553          * 2) Other (Link Status Change, etc.)
2554          */
2555         vector_threshold = MIN_MSIX_COUNT;
2556
2557         /* The more we get, the more we will assign to Tx/Rx Cleanup
2558          * for the separate queues...where Rx Cleanup >= Tx Cleanup.
2559          * Right now, we simply care about how many we'll get; we'll
2560          * set them up later while requesting irq's.
2561          */
2562         vectors = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
2563                                         vector_threshold, vectors);
2564
2565         if (vectors < 0) {
2566                 dev_err(&adapter->pdev->dev,
2567                         "Unable to allocate MSI-X interrupts\n");
2568                 kfree(adapter->msix_entries);
2569                 adapter->msix_entries = NULL;
2570                 return vectors;
2571         }
2572
2573         /* Adjust for only the vectors we'll use, which is minimum
2574          * of max_msix_q_vectors + NON_Q_VECTORS, or the number of
2575          * vectors we were allocated.
2576          */
2577         adapter->num_msix_vectors = vectors;
2578
2579         return 0;
2580 }
2581
2582 /**
2583  * ixgbevf_set_num_queues - Allocate queues for device, feature dependent
2584  * @adapter: board private structure to initialize
2585  *
2586  * This is the top level queue allocation routine.  The order here is very
2587  * important, starting with the "most" number of features turned on at once,
2588  * and ending with the smallest set of features.  This way large combinations
2589  * can be allocated if they're turned on, and smaller combinations are the
2590  * fallthrough conditions.
2591  *
2592  **/
2593 static void ixgbevf_set_num_queues(struct ixgbevf_adapter *adapter)
2594 {
2595         struct ixgbe_hw *hw = &adapter->hw;
2596         unsigned int def_q = 0;
2597         unsigned int num_tcs = 0;
2598         int err;
2599
2600         /* Start with base case */
2601         adapter->num_rx_queues = 1;
2602         adapter->num_tx_queues = 1;
2603         adapter->num_xdp_queues = 0;
2604
2605         spin_lock_bh(&adapter->mbx_lock);
2606
2607         /* fetch queue configuration from the PF */
2608         err = ixgbevf_get_queues(hw, &num_tcs, &def_q);
2609
2610         spin_unlock_bh(&adapter->mbx_lock);
2611
2612         if (err)
2613                 return;
2614
2615         /* we need as many queues as traffic classes */
2616         if (num_tcs > 1) {
2617                 adapter->num_rx_queues = num_tcs;
2618         } else {
2619                 u16 rss = min_t(u16, num_online_cpus(), IXGBEVF_MAX_RSS_QUEUES);
2620
2621                 switch (hw->api_version) {
2622                 case ixgbe_mbox_api_11:
2623                 case ixgbe_mbox_api_12:
2624                 case ixgbe_mbox_api_13:
2625                 case ixgbe_mbox_api_14:
2626                         if (adapter->xdp_prog &&
2627                             hw->mac.max_tx_queues == rss)
2628                                 rss = rss > 3 ? 2 : 1;
2629
2630                         adapter->num_rx_queues = rss;
2631                         adapter->num_tx_queues = rss;
2632                         adapter->num_xdp_queues = adapter->xdp_prog ? rss : 0;
2633                 default:
2634                         break;
2635                 }
2636         }
2637 }
2638
2639 /**
2640  * ixgbevf_set_interrupt_capability - set MSI-X or FAIL if not supported
2641  * @adapter: board private structure to initialize
2642  *
2643  * Attempt to configure the interrupts using the best available
2644  * capabilities of the hardware and the kernel.
2645  **/
2646 static int ixgbevf_set_interrupt_capability(struct ixgbevf_adapter *adapter)
2647 {
2648         int vector, v_budget;
2649
2650         /* It's easy to be greedy for MSI-X vectors, but it really
2651          * doesn't do us much good if we have a lot more vectors
2652          * than CPU's.  So let's be conservative and only ask for
2653          * (roughly) the same number of vectors as there are CPU's.
2654          * The default is to use pairs of vectors.
2655          */
2656         v_budget = max(adapter->num_rx_queues, adapter->num_tx_queues);
2657         v_budget = min_t(int, v_budget, num_online_cpus());
2658         v_budget += NON_Q_VECTORS;
2659
2660         adapter->msix_entries = kcalloc(v_budget,
2661                                         sizeof(struct msix_entry), GFP_KERNEL);
2662         if (!adapter->msix_entries)
2663                 return -ENOMEM;
2664
2665         for (vector = 0; vector < v_budget; vector++)
2666                 adapter->msix_entries[vector].entry = vector;
2667
2668         /* A failure in MSI-X entry allocation isn't fatal, but the VF driver
2669          * does not support any other modes, so we will simply fail here. Note
2670          * that we clean up the msix_entries pointer else-where.
2671          */
2672         return ixgbevf_acquire_msix_vectors(adapter, v_budget);
2673 }
2674
2675 static void ixgbevf_add_ring(struct ixgbevf_ring *ring,
2676                              struct ixgbevf_ring_container *head)
2677 {
2678         ring->next = head->ring;
2679         head->ring = ring;
2680         head->count++;
2681 }
2682
2683 /**
2684  * ixgbevf_alloc_q_vector - Allocate memory for a single interrupt vector
2685  * @adapter: board private structure to initialize
2686  * @v_idx: index of vector in adapter struct
2687  * @txr_count: number of Tx rings for q vector
2688  * @txr_idx: index of first Tx ring to assign
2689  * @xdp_count: total number of XDP rings to allocate
2690  * @xdp_idx: index of first XDP ring to allocate
2691  * @rxr_count: number of Rx rings for q vector
2692  * @rxr_idx: index of first Rx ring to assign
2693  *
2694  * We allocate one q_vector.  If allocation fails we return -ENOMEM.
2695  **/
2696 static int ixgbevf_alloc_q_vector(struct ixgbevf_adapter *adapter, int v_idx,
2697                                   int txr_count, int txr_idx,
2698                                   int xdp_count, int xdp_idx,
2699                                   int rxr_count, int rxr_idx)
2700 {
2701         struct ixgbevf_q_vector *q_vector;
2702         int reg_idx = txr_idx + xdp_idx;
2703         struct ixgbevf_ring *ring;
2704         int ring_count, size;
2705
2706         ring_count = txr_count + xdp_count + rxr_count;
2707         size = sizeof(*q_vector) + (sizeof(*ring) * ring_count);
2708
2709         /* allocate q_vector and rings */
2710         q_vector = kzalloc(size, GFP_KERNEL);
2711         if (!q_vector)
2712                 return -ENOMEM;
2713
2714         /* initialize NAPI */
2715         netif_napi_add(adapter->netdev, &q_vector->napi, ixgbevf_poll, 64);
2716
2717         /* tie q_vector and adapter together */
2718         adapter->q_vector[v_idx] = q_vector;
2719         q_vector->adapter = adapter;
2720         q_vector->v_idx = v_idx;
2721
2722         /* initialize pointer to rings */
2723         ring = q_vector->ring;
2724
2725         while (txr_count) {
2726                 /* assign generic ring traits */
2727                 ring->dev = &adapter->pdev->dev;
2728                 ring->netdev = adapter->netdev;
2729
2730                 /* configure backlink on ring */
2731                 ring->q_vector = q_vector;
2732
2733                 /* update q_vector Tx values */
2734                 ixgbevf_add_ring(ring, &q_vector->tx);
2735
2736                 /* apply Tx specific ring traits */
2737                 ring->count = adapter->tx_ring_count;
2738                 ring->queue_index = txr_idx;
2739                 ring->reg_idx = reg_idx;
2740
2741                 /* assign ring to adapter */
2742                  adapter->tx_ring[txr_idx] = ring;
2743
2744                 /* update count and index */
2745                 txr_count--;
2746                 txr_idx++;
2747                 reg_idx++;
2748
2749                 /* push pointer to next ring */
2750                 ring++;
2751         }
2752
2753         while (xdp_count) {
2754                 /* assign generic ring traits */
2755                 ring->dev = &adapter->pdev->dev;
2756                 ring->netdev = adapter->netdev;
2757
2758                 /* configure backlink on ring */
2759                 ring->q_vector = q_vector;
2760
2761                 /* update q_vector Tx values */
2762                 ixgbevf_add_ring(ring, &q_vector->tx);
2763
2764                 /* apply Tx specific ring traits */
2765                 ring->count = adapter->tx_ring_count;
2766                 ring->queue_index = xdp_idx;
2767                 ring->reg_idx = reg_idx;
2768                 set_ring_xdp(ring);
2769
2770                 /* assign ring to adapter */
2771                 adapter->xdp_ring[xdp_idx] = ring;
2772
2773                 /* update count and index */
2774                 xdp_count--;
2775                 xdp_idx++;
2776                 reg_idx++;
2777
2778                 /* push pointer to next ring */
2779                 ring++;
2780         }
2781
2782         while (rxr_count) {
2783                 /* assign generic ring traits */
2784                 ring->dev = &adapter->pdev->dev;
2785                 ring->netdev = adapter->netdev;
2786
2787                 /* configure backlink on ring */
2788                 ring->q_vector = q_vector;
2789
2790                 /* update q_vector Rx values */
2791                 ixgbevf_add_ring(ring, &q_vector->rx);
2792
2793                 /* apply Rx specific ring traits */
2794                 ring->count = adapter->rx_ring_count;
2795                 ring->queue_index = rxr_idx;
2796                 ring->reg_idx = rxr_idx;
2797
2798                 /* assign ring to adapter */
2799                 adapter->rx_ring[rxr_idx] = ring;
2800
2801                 /* update count and index */
2802                 rxr_count--;
2803                 rxr_idx++;
2804
2805                 /* push pointer to next ring */
2806                 ring++;
2807         }
2808
2809         return 0;
2810 }
2811
2812 /**
2813  * ixgbevf_free_q_vector - Free memory allocated for specific interrupt vector
2814  * @adapter: board private structure to initialize
2815  * @v_idx: index of vector in adapter struct
2816  *
2817  * This function frees the memory allocated to the q_vector.  In addition if
2818  * NAPI is enabled it will delete any references to the NAPI struct prior
2819  * to freeing the q_vector.
2820  **/
2821 static void ixgbevf_free_q_vector(struct ixgbevf_adapter *adapter, int v_idx)
2822 {
2823         struct ixgbevf_q_vector *q_vector = adapter->q_vector[v_idx];
2824         struct ixgbevf_ring *ring;
2825
2826         ixgbevf_for_each_ring(ring, q_vector->tx) {
2827                 if (ring_is_xdp(ring))
2828                         adapter->xdp_ring[ring->queue_index] = NULL;
2829                 else
2830                         adapter->tx_ring[ring->queue_index] = NULL;
2831         }
2832
2833         ixgbevf_for_each_ring(ring, q_vector->rx)
2834                 adapter->rx_ring[ring->queue_index] = NULL;
2835
2836         adapter->q_vector[v_idx] = NULL;
2837         netif_napi_del(&q_vector->napi);
2838
2839         /* ixgbevf_get_stats() might access the rings on this vector,
2840          * we must wait a grace period before freeing it.
2841          */
2842         kfree_rcu(q_vector, rcu);
2843 }
2844
2845 /**
2846  * ixgbevf_alloc_q_vectors - Allocate memory for interrupt vectors
2847  * @adapter: board private structure to initialize
2848  *
2849  * We allocate one q_vector per queue interrupt.  If allocation fails we
2850  * return -ENOMEM.
2851  **/
2852 static int ixgbevf_alloc_q_vectors(struct ixgbevf_adapter *adapter)
2853 {
2854         int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2855         int rxr_remaining = adapter->num_rx_queues;
2856         int txr_remaining = adapter->num_tx_queues;
2857         int xdp_remaining = adapter->num_xdp_queues;
2858         int rxr_idx = 0, txr_idx = 0, xdp_idx = 0, v_idx = 0;
2859         int err;
2860
2861         if (q_vectors >= (rxr_remaining + txr_remaining + xdp_remaining)) {
2862                 for (; rxr_remaining; v_idx++, q_vectors--) {
2863                         int rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors);
2864
2865                         err = ixgbevf_alloc_q_vector(adapter, v_idx,
2866                                                      0, 0, 0, 0, rqpv, rxr_idx);
2867                         if (err)
2868                                 goto err_out;
2869
2870                         /* update counts and index */
2871                         rxr_remaining -= rqpv;
2872                         rxr_idx += rqpv;
2873                 }
2874         }
2875
2876         for (; q_vectors; v_idx++, q_vectors--) {
2877                 int rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors);
2878                 int tqpv = DIV_ROUND_UP(txr_remaining, q_vectors);
2879                 int xqpv = DIV_ROUND_UP(xdp_remaining, q_vectors);
2880
2881                 err = ixgbevf_alloc_q_vector(adapter, v_idx,
2882                                              tqpv, txr_idx,
2883                                              xqpv, xdp_idx,
2884                                              rqpv, rxr_idx);
2885
2886                 if (err)
2887                         goto err_out;
2888
2889                 /* update counts and index */
2890                 rxr_remaining -= rqpv;
2891                 rxr_idx += rqpv;
2892                 txr_remaining -= tqpv;
2893                 txr_idx += tqpv;
2894                 xdp_remaining -= xqpv;
2895                 xdp_idx += xqpv;
2896         }
2897
2898         return 0;
2899
2900 err_out:
2901         while (v_idx) {
2902                 v_idx--;
2903                 ixgbevf_free_q_vector(adapter, v_idx);
2904         }
2905
2906         return -ENOMEM;
2907 }
2908
2909 /**
2910  * ixgbevf_free_q_vectors - Free memory allocated for interrupt vectors
2911  * @adapter: board private structure to initialize
2912  *
2913  * This function frees the memory allocated to the q_vectors.  In addition if
2914  * NAPI is enabled it will delete any references to the NAPI struct prior
2915  * to freeing the q_vector.
2916  **/
2917 static void ixgbevf_free_q_vectors(struct ixgbevf_adapter *adapter)
2918 {
2919         int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2920
2921         while (q_vectors) {
2922                 q_vectors--;
2923                 ixgbevf_free_q_vector(adapter, q_vectors);
2924         }
2925 }
2926
2927 /**
2928  * ixgbevf_reset_interrupt_capability - Reset MSIX setup
2929  * @adapter: board private structure
2930  *
2931  **/
2932 static void ixgbevf_reset_interrupt_capability(struct ixgbevf_adapter *adapter)
2933 {
2934         if (!adapter->msix_entries)
2935                 return;
2936
2937         pci_disable_msix(adapter->pdev);
2938         kfree(adapter->msix_entries);
2939         adapter->msix_entries = NULL;
2940 }
2941
2942 /**
2943  * ixgbevf_init_interrupt_scheme - Determine if MSIX is supported and init
2944  * @adapter: board private structure to initialize
2945  *
2946  **/
2947 static int ixgbevf_init_interrupt_scheme(struct ixgbevf_adapter *adapter)
2948 {
2949         int err;
2950
2951         /* Number of supported queues */
2952         ixgbevf_set_num_queues(adapter);
2953
2954         err = ixgbevf_set_interrupt_capability(adapter);
2955         if (err) {
2956                 hw_dbg(&adapter->hw,
2957                        "Unable to setup interrupt capabilities\n");
2958                 goto err_set_interrupt;
2959         }
2960
2961         err = ixgbevf_alloc_q_vectors(adapter);
2962         if (err) {
2963                 hw_dbg(&adapter->hw, "Unable to allocate memory for queue vectors\n");
2964                 goto err_alloc_q_vectors;
2965         }
2966
2967         hw_dbg(&adapter->hw, "Multiqueue %s: Rx Queue count = %u, Tx Queue count = %u XDP Queue count %u\n",
2968                (adapter->num_rx_queues > 1) ? "Enabled" : "Disabled",
2969                adapter->num_rx_queues, adapter->num_tx_queues,
2970                adapter->num_xdp_queues);
2971
2972         set_bit(__IXGBEVF_DOWN, &adapter->state);
2973
2974         return 0;
2975 err_alloc_q_vectors:
2976         ixgbevf_reset_interrupt_capability(adapter);
2977 err_set_interrupt:
2978         return err;
2979 }
2980
2981 /**
2982  * ixgbevf_clear_interrupt_scheme - Clear the current interrupt scheme settings
2983  * @adapter: board private structure to clear interrupt scheme on
2984  *
2985  * We go through and clear interrupt specific resources and reset the structure
2986  * to pre-load conditions
2987  **/
2988 static void ixgbevf_clear_interrupt_scheme(struct ixgbevf_adapter *adapter)
2989 {
2990         adapter->num_tx_queues = 0;
2991         adapter->num_xdp_queues = 0;
2992         adapter->num_rx_queues = 0;
2993
2994         ixgbevf_free_q_vectors(adapter);
2995         ixgbevf_reset_interrupt_capability(adapter);
2996 }
2997
2998 /**
2999  * ixgbevf_sw_init - Initialize general software structures
3000  * @adapter: board private structure to initialize
3001  *
3002  * ixgbevf_sw_init initializes the Adapter private data structure.
3003  * Fields are initialized based on PCI device information and
3004  * OS network device settings (MTU size).
3005  **/
3006 static int ixgbevf_sw_init(struct ixgbevf_adapter *adapter)
3007 {
3008         struct ixgbe_hw *hw = &adapter->hw;
3009         struct pci_dev *pdev = adapter->pdev;
3010         struct net_device *netdev = adapter->netdev;
3011         int err;
3012
3013         /* PCI config space info */
3014         hw->vendor_id = pdev->vendor;
3015         hw->device_id = pdev->device;
3016         hw->revision_id = pdev->revision;
3017         hw->subsystem_vendor_id = pdev->subsystem_vendor;
3018         hw->subsystem_device_id = pdev->subsystem_device;
3019
3020         hw->mbx.ops.init_params(hw);
3021
3022         if (hw->mac.type >= ixgbe_mac_X550_vf) {
3023                 err = ixgbevf_init_rss_key(adapter);
3024                 if (err)
3025                         goto out;
3026         }
3027
3028         /* assume legacy case in which PF would only give VF 2 queues */
3029         hw->mac.max_tx_queues = 2;
3030         hw->mac.max_rx_queues = 2;
3031
3032         /* lock to protect mailbox accesses */
3033         spin_lock_init(&adapter->mbx_lock);
3034
3035         err = hw->mac.ops.reset_hw(hw);
3036         if (err) {
3037                 dev_info(&pdev->dev,
3038                          "PF still in reset state.  Is the PF interface up?\n");
3039         } else {
3040                 err = hw->mac.ops.init_hw(hw);
3041                 if (err) {
3042                         pr_err("init_shared_code failed: %d\n", err);
3043                         goto out;
3044                 }
3045                 ixgbevf_negotiate_api(adapter);
3046                 err = hw->mac.ops.get_mac_addr(hw, hw->mac.addr);
3047                 if (err)
3048                         dev_info(&pdev->dev, "Error reading MAC address\n");
3049                 else if (is_zero_ether_addr(adapter->hw.mac.addr))
3050                         dev_info(&pdev->dev,
3051                                  "MAC address not assigned by administrator.\n");
3052                 ether_addr_copy(netdev->dev_addr, hw->mac.addr);
3053         }
3054
3055         if (!is_valid_ether_addr(netdev->dev_addr)) {
3056                 dev_info(&pdev->dev, "Assigning random MAC address\n");
3057                 eth_hw_addr_random(netdev);
3058                 ether_addr_copy(hw->mac.addr, netdev->dev_addr);
3059                 ether_addr_copy(hw->mac.perm_addr, netdev->dev_addr);
3060         }
3061
3062         /* Enable dynamic interrupt throttling rates */
3063         adapter->rx_itr_setting = 1;
3064         adapter->tx_itr_setting = 1;
3065
3066         /* set default ring sizes */
3067         adapter->tx_ring_count = IXGBEVF_DEFAULT_TXD;
3068         adapter->rx_ring_count = IXGBEVF_DEFAULT_RXD;
3069
3070         set_bit(__IXGBEVF_DOWN, &adapter->state);
3071         return 0;
3072
3073 out:
3074         return err;
3075 }
3076
3077 #define UPDATE_VF_COUNTER_32bit(reg, last_counter, counter)     \
3078         {                                                       \
3079                 u32 current_counter = IXGBE_READ_REG(hw, reg);  \
3080                 if (current_counter < last_counter)             \
3081                         counter += 0x100000000LL;               \
3082                 last_counter = current_counter;                 \
3083                 counter &= 0xFFFFFFFF00000000LL;                \
3084                 counter |= current_counter;                     \
3085         }
3086
3087 #define UPDATE_VF_COUNTER_36bit(reg_lsb, reg_msb, last_counter, counter) \
3088         {                                                                \
3089                 u64 current_counter_lsb = IXGBE_READ_REG(hw, reg_lsb);   \
3090                 u64 current_counter_msb = IXGBE_READ_REG(hw, reg_msb);   \
3091                 u64 current_counter = (current_counter_msb << 32) |      \
3092                         current_counter_lsb;                             \
3093                 if (current_counter < last_counter)                      \
3094                         counter += 0x1000000000LL;                       \
3095                 last_counter = current_counter;                          \
3096                 counter &= 0xFFFFFFF000000000LL;                         \
3097                 counter |= current_counter;                              \
3098         }
3099 /**
3100  * ixgbevf_update_stats - Update the board statistics counters.
3101  * @adapter: board private structure
3102  **/
3103 void ixgbevf_update_stats(struct ixgbevf_adapter *adapter)
3104 {
3105         struct ixgbe_hw *hw = &adapter->hw;
3106         u64 alloc_rx_page_failed = 0, alloc_rx_buff_failed = 0;
3107         u64 alloc_rx_page = 0, hw_csum_rx_error = 0;
3108         int i;
3109
3110         if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
3111             test_bit(__IXGBEVF_RESETTING, &adapter->state))
3112                 return;
3113
3114         UPDATE_VF_COUNTER_32bit(IXGBE_VFGPRC, adapter->stats.last_vfgprc,
3115                                 adapter->stats.vfgprc);
3116         UPDATE_VF_COUNTER_32bit(IXGBE_VFGPTC, adapter->stats.last_vfgptc,
3117                                 adapter->stats.vfgptc);
3118         UPDATE_VF_COUNTER_36bit(IXGBE_VFGORC_LSB, IXGBE_VFGORC_MSB,
3119                                 adapter->stats.last_vfgorc,
3120                                 adapter->stats.vfgorc);
3121         UPDATE_VF_COUNTER_36bit(IXGBE_VFGOTC_LSB, IXGBE_VFGOTC_MSB,
3122                                 adapter->stats.last_vfgotc,
3123                                 adapter->stats.vfgotc);
3124         UPDATE_VF_COUNTER_32bit(IXGBE_VFMPRC, adapter->stats.last_vfmprc,
3125                                 adapter->stats.vfmprc);
3126
3127         for (i = 0;  i  < adapter->num_rx_queues;  i++) {
3128                 struct ixgbevf_ring *rx_ring = adapter->rx_ring[i];
3129
3130                 hw_csum_rx_error += rx_ring->rx_stats.csum_err;
3131                 alloc_rx_page_failed += rx_ring->rx_stats.alloc_rx_page_failed;
3132                 alloc_rx_buff_failed += rx_ring->rx_stats.alloc_rx_buff_failed;
3133                 alloc_rx_page += rx_ring->rx_stats.alloc_rx_page;
3134         }
3135
3136         adapter->hw_csum_rx_error = hw_csum_rx_error;
3137         adapter->alloc_rx_page_failed = alloc_rx_page_failed;
3138         adapter->alloc_rx_buff_failed = alloc_rx_buff_failed;
3139         adapter->alloc_rx_page = alloc_rx_page;
3140 }
3141
3142 /**
3143  * ixgbevf_service_timer - Timer Call-back
3144  * @t: pointer to timer_list struct
3145  **/
3146 static void ixgbevf_service_timer(struct timer_list *t)
3147 {
3148         struct ixgbevf_adapter *adapter = from_timer(adapter, t,
3149                                                      service_timer);
3150
3151         /* Reset the timer */
3152         mod_timer(&adapter->service_timer, (HZ * 2) + jiffies);
3153
3154         ixgbevf_service_event_schedule(adapter);
3155 }
3156
3157 static void ixgbevf_reset_subtask(struct ixgbevf_adapter *adapter)
3158 {
3159         if (!test_and_clear_bit(__IXGBEVF_RESET_REQUESTED, &adapter->state))
3160                 return;
3161
3162         rtnl_lock();
3163         /* If we're already down or resetting, just bail */
3164         if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
3165             test_bit(__IXGBEVF_REMOVING, &adapter->state) ||
3166             test_bit(__IXGBEVF_RESETTING, &adapter->state)) {
3167                 rtnl_unlock();
3168                 return;
3169         }
3170
3171         adapter->tx_timeout_count++;
3172
3173         ixgbevf_reinit_locked(adapter);
3174         rtnl_unlock();
3175 }
3176
3177 /**
3178  * ixgbevf_check_hang_subtask - check for hung queues and dropped interrupts
3179  * @adapter: pointer to the device adapter structure
3180  *
3181  * This function serves two purposes.  First it strobes the interrupt lines
3182  * in order to make certain interrupts are occurring.  Secondly it sets the
3183  * bits needed to check for TX hangs.  As a result we should immediately
3184  * determine if a hang has occurred.
3185  **/
3186 static void ixgbevf_check_hang_subtask(struct ixgbevf_adapter *adapter)
3187 {
3188         struct ixgbe_hw *hw = &adapter->hw;
3189         u32 eics = 0;
3190         int i;
3191
3192         /* If we're down or resetting, just bail */
3193         if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
3194             test_bit(__IXGBEVF_RESETTING, &adapter->state))
3195                 return;
3196
3197         /* Force detection of hung controller */
3198         if (netif_carrier_ok(adapter->netdev)) {
3199                 for (i = 0; i < adapter->num_tx_queues; i++)
3200                         set_check_for_tx_hang(adapter->tx_ring[i]);
3201                 for (i = 0; i < adapter->num_xdp_queues; i++)
3202                         set_check_for_tx_hang(adapter->xdp_ring[i]);
3203         }
3204
3205         /* get one bit for every active Tx/Rx interrupt vector */
3206         for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) {
3207                 struct ixgbevf_q_vector *qv = adapter->q_vector[i];
3208
3209                 if (qv->rx.ring || qv->tx.ring)
3210                         eics |= BIT(i);
3211         }
3212
3213         /* Cause software interrupt to ensure rings are cleaned */
3214         IXGBE_WRITE_REG(hw, IXGBE_VTEICS, eics);
3215 }
3216
3217 /**
3218  * ixgbevf_watchdog_update_link - update the link status
3219  * @adapter: pointer to the device adapter structure
3220  **/
3221 static void ixgbevf_watchdog_update_link(struct ixgbevf_adapter *adapter)
3222 {
3223         struct ixgbe_hw *hw = &adapter->hw;
3224         u32 link_speed = adapter->link_speed;
3225         bool link_up = adapter->link_up;
3226         s32 err;
3227
3228         spin_lock_bh(&adapter->mbx_lock);
3229
3230         err = hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
3231
3232         spin_unlock_bh(&adapter->mbx_lock);
3233
3234         /* if check for link returns error we will need to reset */
3235         if (err && time_after(jiffies, adapter->last_reset + (10 * HZ))) {
3236                 set_bit(__IXGBEVF_RESET_REQUESTED, &adapter->state);
3237                 link_up = false;
3238         }
3239
3240         adapter->link_up = link_up;
3241         adapter->link_speed = link_speed;
3242 }
3243
3244 /**
3245  * ixgbevf_watchdog_link_is_up - update netif_carrier status and
3246  *                               print link up message
3247  * @adapter: pointer to the device adapter structure
3248  **/
3249 static void ixgbevf_watchdog_link_is_up(struct ixgbevf_adapter *adapter)
3250 {
3251         struct net_device *netdev = adapter->netdev;
3252
3253         /* only continue if link was previously down */
3254         if (netif_carrier_ok(netdev))
3255                 return;
3256
3257         dev_info(&adapter->pdev->dev, "NIC Link is Up %s\n",
3258                  (adapter->link_speed == IXGBE_LINK_SPEED_10GB_FULL) ?
3259                  "10 Gbps" :
3260                  (adapter->link_speed == IXGBE_LINK_SPEED_1GB_FULL) ?
3261                  "1 Gbps" :
3262                  (adapter->link_speed == IXGBE_LINK_SPEED_100_FULL) ?
3263                  "100 Mbps" :
3264                  "unknown speed");
3265
3266         netif_carrier_on(netdev);
3267 }
3268
3269 /**
3270  * ixgbevf_watchdog_link_is_down - update netif_carrier status and
3271  *                                 print link down message
3272  * @adapter: pointer to the adapter structure
3273  **/
3274 static void ixgbevf_watchdog_link_is_down(struct ixgbevf_adapter *adapter)
3275 {
3276         struct net_device *netdev = adapter->netdev;
3277
3278         adapter->link_speed = 0;
3279
3280         /* only continue if link was up previously */
3281         if (!netif_carrier_ok(netdev))
3282                 return;
3283
3284         dev_info(&adapter->pdev->dev, "NIC Link is Down\n");
3285
3286         netif_carrier_off(netdev);
3287 }
3288
3289 /**
3290  * ixgbevf_watchdog_subtask - worker thread to bring link up
3291  * @adapter: board private structure
3292  **/
3293 static void ixgbevf_watchdog_subtask(struct ixgbevf_adapter *adapter)
3294 {
3295         /* if interface is down do nothing */
3296         if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
3297             test_bit(__IXGBEVF_RESETTING, &adapter->state))
3298                 return;
3299
3300         ixgbevf_watchdog_update_link(adapter);
3301
3302         if (adapter->link_up)
3303                 ixgbevf_watchdog_link_is_up(adapter);
3304         else
3305                 ixgbevf_watchdog_link_is_down(adapter);
3306
3307         ixgbevf_update_stats(adapter);
3308 }
3309
3310 /**
3311  * ixgbevf_service_task - manages and runs subtasks
3312  * @work: pointer to work_struct containing our data
3313  **/
3314 static void ixgbevf_service_task(struct work_struct *work)
3315 {
3316         struct ixgbevf_adapter *adapter = container_of(work,
3317                                                        struct ixgbevf_adapter,
3318                                                        service_task);
3319         struct ixgbe_hw *hw = &adapter->hw;
3320
3321         if (IXGBE_REMOVED(hw->hw_addr)) {
3322                 if (!test_bit(__IXGBEVF_DOWN, &adapter->state)) {
3323                         rtnl_lock();
3324                         ixgbevf_down(adapter);
3325                         rtnl_unlock();
3326                 }
3327                 return;
3328         }
3329
3330         ixgbevf_queue_reset_subtask(adapter);
3331         ixgbevf_reset_subtask(adapter);
3332         ixgbevf_watchdog_subtask(adapter);
3333         ixgbevf_check_hang_subtask(adapter);
3334
3335         ixgbevf_service_event_complete(adapter);
3336 }
3337
3338 /**
3339  * ixgbevf_free_tx_resources - Free Tx Resources per Queue
3340  * @tx_ring: Tx descriptor ring for a specific queue
3341  *
3342  * Free all transmit software resources
3343  **/
3344 void ixgbevf_free_tx_resources(struct ixgbevf_ring *tx_ring)
3345 {
3346         ixgbevf_clean_tx_ring(tx_ring);
3347
3348         vfree(tx_ring->tx_buffer_info);
3349         tx_ring->tx_buffer_info = NULL;
3350
3351         /* if not set, then don't free */
3352         if (!tx_ring->desc)
3353                 return;
3354
3355         dma_free_coherent(tx_ring->dev, tx_ring->size, tx_ring->desc,
3356                           tx_ring->dma);
3357
3358         tx_ring->desc = NULL;
3359 }
3360
3361 /**
3362  * ixgbevf_free_all_tx_resources - Free Tx Resources for All Queues
3363  * @adapter: board private structure
3364  *
3365  * Free all transmit software resources
3366  **/
3367 static void ixgbevf_free_all_tx_resources(struct ixgbevf_adapter *adapter)
3368 {
3369         int i;
3370
3371         for (i = 0; i < adapter->num_tx_queues; i++)
3372                 if (adapter->tx_ring[i]->desc)
3373                         ixgbevf_free_tx_resources(adapter->tx_ring[i]);
3374         for (i = 0; i < adapter->num_xdp_queues; i++)
3375                 if (adapter->xdp_ring[i]->desc)
3376                         ixgbevf_free_tx_resources(adapter->xdp_ring[i]);
3377 }
3378
3379 /**
3380  * ixgbevf_setup_tx_resources - allocate Tx resources (Descriptors)
3381  * @tx_ring: Tx descriptor ring (for a specific queue) to setup
3382  *
3383  * Return 0 on success, negative on failure
3384  **/
3385 int ixgbevf_setup_tx_resources(struct ixgbevf_ring *tx_ring)
3386 {
3387         struct ixgbevf_adapter *adapter = netdev_priv(tx_ring->netdev);
3388         int size;
3389
3390         size = sizeof(struct ixgbevf_tx_buffer) * tx_ring->count;
3391         tx_ring->tx_buffer_info = vmalloc(size);
3392         if (!tx_ring->tx_buffer_info)
3393                 goto err;
3394
3395         u64_stats_init(&tx_ring->syncp);
3396
3397         /* round up to nearest 4K */
3398         tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
3399         tx_ring->size = ALIGN(tx_ring->size, 4096);
3400
3401         tx_ring->desc = dma_alloc_coherent(tx_ring->dev, tx_ring->size,
3402                                            &tx_ring->dma, GFP_KERNEL);
3403         if (!tx_ring->desc)
3404                 goto err;
3405
3406         return 0;
3407
3408 err:
3409         vfree(tx_ring->tx_buffer_info);
3410         tx_ring->tx_buffer_info = NULL;
3411         hw_dbg(&adapter->hw, "Unable to allocate memory for the transmit descriptor ring\n");
3412         return -ENOMEM;
3413 }
3414
3415 /**
3416  * ixgbevf_setup_all_tx_resources - allocate all queues Tx resources
3417  * @adapter: board private structure
3418  *
3419  * If this function returns with an error, then it's possible one or
3420  * more of the rings is populated (while the rest are not).  It is the
3421  * callers duty to clean those orphaned rings.
3422  *
3423  * Return 0 on success, negative on failure
3424  **/
3425 static int ixgbevf_setup_all_tx_resources(struct ixgbevf_adapter *adapter)
3426 {
3427         int i, j = 0, err = 0;
3428
3429         for (i = 0; i < adapter->num_tx_queues; i++) {
3430                 err = ixgbevf_setup_tx_resources(adapter->tx_ring[i]);
3431                 if (!err)
3432                         continue;
3433                 hw_dbg(&adapter->hw, "Allocation for Tx Queue %u failed\n", i);
3434                 goto err_setup_tx;
3435         }
3436
3437         for (j = 0; j < adapter->num_xdp_queues; j++) {
3438                 err = ixgbevf_setup_tx_resources(adapter->xdp_ring[j]);
3439                 if (!err)
3440                         continue;
3441                 hw_dbg(&adapter->hw, "Allocation for XDP Queue %u failed\n", j);
3442                 goto err_setup_tx;
3443         }
3444
3445         return 0;
3446 err_setup_tx:
3447         /* rewind the index freeing the rings as we go */
3448         while (j--)
3449                 ixgbevf_free_tx_resources(adapter->xdp_ring[j]);
3450         while (i--)
3451                 ixgbevf_free_tx_resources(adapter->tx_ring[i]);
3452
3453         return err;
3454 }
3455
3456 /**
3457  * ixgbevf_setup_rx_resources - allocate Rx resources (Descriptors)
3458  * @adapter: board private structure
3459  * @rx_ring: Rx descriptor ring (for a specific queue) to setup
3460  *
3461  * Returns 0 on success, negative on failure
3462  **/
3463 int ixgbevf_setup_rx_resources(struct ixgbevf_adapter *adapter,
3464                                struct ixgbevf_ring *rx_ring)
3465 {
3466         int size;
3467
3468         size = sizeof(struct ixgbevf_rx_buffer) * rx_ring->count;
3469         rx_ring->rx_buffer_info = vmalloc(size);
3470         if (!rx_ring->rx_buffer_info)
3471                 goto err;
3472
3473         u64_stats_init(&rx_ring->syncp);
3474
3475         /* Round up to nearest 4K */
3476         rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
3477         rx_ring->size = ALIGN(rx_ring->size, 4096);
3478
3479         rx_ring->desc = dma_alloc_coherent(rx_ring->dev, rx_ring->size,
3480                                            &rx_ring->dma, GFP_KERNEL);
3481
3482         if (!rx_ring->desc)
3483                 goto err;
3484
3485         /* XDP RX-queue info */
3486         if (xdp_rxq_info_reg(&rx_ring->xdp_rxq, adapter->netdev,
3487                              rx_ring->queue_index) < 0)
3488                 goto err;
3489
3490         rx_ring->xdp_prog = adapter->xdp_prog;
3491
3492         return 0;
3493 err:
3494         vfree(rx_ring->rx_buffer_info);
3495         rx_ring->rx_buffer_info = NULL;
3496         dev_err(rx_ring->dev, "Unable to allocate memory for the Rx descriptor ring\n");
3497         return -ENOMEM;
3498 }
3499
3500 /**
3501  * ixgbevf_setup_all_rx_resources - allocate all queues Rx resources
3502  * @adapter: board private structure
3503  *
3504  * If this function returns with an error, then it's possible one or
3505  * more of the rings is populated (while the rest are not).  It is the
3506  * callers duty to clean those orphaned rings.
3507  *
3508  * Return 0 on success, negative on failure
3509  **/
3510 static int ixgbevf_setup_all_rx_resources(struct ixgbevf_adapter *adapter)
3511 {
3512         int i, err = 0;
3513
3514         for (i = 0; i < adapter->num_rx_queues; i++) {
3515                 err = ixgbevf_setup_rx_resources(adapter, adapter->rx_ring[i]);
3516                 if (!err)
3517                         continue;
3518                 hw_dbg(&adapter->hw, "Allocation for Rx Queue %u failed\n", i);
3519                 goto err_setup_rx;
3520         }
3521
3522         return 0;
3523 err_setup_rx:
3524         /* rewind the index freeing the rings as we go */
3525         while (i--)
3526                 ixgbevf_free_rx_resources(adapter->rx_ring[i]);
3527         return err;
3528 }
3529
3530 /**
3531  * ixgbevf_free_rx_resources - Free Rx Resources
3532  * @rx_ring: ring to clean the resources from
3533  *
3534  * Free all receive software resources
3535  **/
3536 void ixgbevf_free_rx_resources(struct ixgbevf_ring *rx_ring)
3537 {
3538         ixgbevf_clean_rx_ring(rx_ring);
3539
3540         rx_ring->xdp_prog = NULL;
3541         xdp_rxq_info_unreg(&rx_ring->xdp_rxq);
3542         vfree(rx_ring->rx_buffer_info);
3543         rx_ring->rx_buffer_info = NULL;
3544
3545         dma_free_coherent(rx_ring->dev, rx_ring->size, rx_ring->desc,
3546                           rx_ring->dma);
3547
3548         rx_ring->desc = NULL;
3549 }
3550
3551 /**
3552  * ixgbevf_free_all_rx_resources - Free Rx Resources for All Queues
3553  * @adapter: board private structure
3554  *
3555  * Free all receive software resources
3556  **/
3557 static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter *adapter)
3558 {
3559         int i;
3560
3561         for (i = 0; i < adapter->num_rx_queues; i++)
3562                 if (adapter->rx_ring[i]->desc)
3563                         ixgbevf_free_rx_resources(adapter->rx_ring[i]);
3564 }
3565
3566 /**
3567  * ixgbevf_open - Called when a network interface is made active
3568  * @netdev: network interface device structure
3569  *
3570  * Returns 0 on success, negative value on failure
3571  *
3572  * The open entry point is called when a network interface is made
3573  * active by the system (IFF_UP).  At this point all resources needed
3574  * for transmit and receive operations are allocated, the interrupt
3575  * handler is registered with the OS, the watchdog timer is started,
3576  * and the stack is notified that the interface is ready.
3577  **/
3578 int ixgbevf_open(struct net_device *netdev)
3579 {
3580         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3581         struct ixgbe_hw *hw = &adapter->hw;
3582         int err;
3583
3584         /* A previous failure to open the device because of a lack of
3585          * available MSIX vector resources may have reset the number
3586          * of msix vectors variable to zero.  The only way to recover
3587          * is to unload/reload the driver and hope that the system has
3588          * been able to recover some MSIX vector resources.
3589          */
3590         if (!adapter->num_msix_vectors)
3591                 return -ENOMEM;
3592
3593         if (hw->adapter_stopped) {
3594                 ixgbevf_reset(adapter);
3595                 /* if adapter is still stopped then PF isn't up and
3596                  * the VF can't start.
3597                  */
3598                 if (hw->adapter_stopped) {
3599                         err = IXGBE_ERR_MBX;
3600                         pr_err("Unable to start - perhaps the PF Driver isn't up yet\n");
3601                         goto err_setup_reset;
3602                 }
3603         }
3604
3605         /* disallow open during test */
3606         if (test_bit(__IXGBEVF_TESTING, &adapter->state))
3607                 return -EBUSY;
3608
3609         netif_carrier_off(netdev);
3610
3611         /* allocate transmit descriptors */
3612         err = ixgbevf_setup_all_tx_resources(adapter);
3613         if (err)
3614                 goto err_setup_tx;
3615
3616         /* allocate receive descriptors */
3617         err = ixgbevf_setup_all_rx_resources(adapter);
3618         if (err)
3619                 goto err_setup_rx;
3620
3621         ixgbevf_configure(adapter);
3622
3623         err = ixgbevf_request_irq(adapter);
3624         if (err)
3625                 goto err_req_irq;
3626
3627         /* Notify the stack of the actual queue counts. */
3628         err = netif_set_real_num_tx_queues(netdev, adapter->num_tx_queues);
3629         if (err)
3630                 goto err_set_queues;
3631
3632         err = netif_set_real_num_rx_queues(netdev, adapter->num_rx_queues);
3633         if (err)
3634                 goto err_set_queues;
3635
3636         ixgbevf_up_complete(adapter);
3637
3638         return 0;
3639
3640 err_set_queues:
3641         ixgbevf_free_irq(adapter);
3642 err_req_irq:
3643         ixgbevf_free_all_rx_resources(adapter);
3644 err_setup_rx:
3645         ixgbevf_free_all_tx_resources(adapter);
3646 err_setup_tx:
3647         ixgbevf_reset(adapter);
3648 err_setup_reset:
3649
3650         return err;
3651 }
3652
3653 /**
3654  * ixgbevf_close_suspend - actions necessary to both suspend and close flows
3655  * @adapter: the private adapter struct
3656  *
3657  * This function should contain the necessary work common to both suspending
3658  * and closing of the device.
3659  */
3660 static void ixgbevf_close_suspend(struct ixgbevf_adapter *adapter)
3661 {
3662         ixgbevf_down(adapter);
3663         ixgbevf_free_irq(adapter);
3664         ixgbevf_free_all_tx_resources(adapter);
3665         ixgbevf_free_all_rx_resources(adapter);
3666 }
3667
3668 /**
3669  * ixgbevf_close - Disables a network interface
3670  * @netdev: network interface device structure
3671  *
3672  * Returns 0, this is not allowed to fail
3673  *
3674  * The close entry point is called when an interface is de-activated
3675  * by the OS.  The hardware is still under the drivers control, but
3676  * needs to be disabled.  A global MAC reset is issued to stop the
3677  * hardware, and all transmit and receive resources are freed.
3678  **/
3679 int ixgbevf_close(struct net_device *netdev)
3680 {
3681         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3682
3683         if (netif_device_present(netdev))
3684                 ixgbevf_close_suspend(adapter);
3685
3686         return 0;
3687 }
3688
3689 static void ixgbevf_queue_reset_subtask(struct ixgbevf_adapter *adapter)
3690 {
3691         struct net_device *dev = adapter->netdev;
3692
3693         if (!test_and_clear_bit(__IXGBEVF_QUEUE_RESET_REQUESTED,
3694                                 &adapter->state))
3695                 return;
3696
3697         /* if interface is down do nothing */
3698         if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
3699             test_bit(__IXGBEVF_RESETTING, &adapter->state))
3700                 return;
3701
3702         /* Hardware has to reinitialize queues and interrupts to
3703          * match packet buffer alignment. Unfortunately, the
3704          * hardware is not flexible enough to do this dynamically.
3705          */
3706         rtnl_lock();
3707
3708         if (netif_running(dev))
3709                 ixgbevf_close(dev);
3710
3711         ixgbevf_clear_interrupt_scheme(adapter);
3712         ixgbevf_init_interrupt_scheme(adapter);
3713
3714         if (netif_running(dev))
3715                 ixgbevf_open(dev);
3716
3717         rtnl_unlock();
3718 }
3719
3720 static void ixgbevf_tx_ctxtdesc(struct ixgbevf_ring *tx_ring,
3721                                 u32 vlan_macip_lens, u32 fceof_saidx,
3722                                 u32 type_tucmd, u32 mss_l4len_idx)
3723 {
3724         struct ixgbe_adv_tx_context_desc *context_desc;
3725         u16 i = tx_ring->next_to_use;
3726
3727         context_desc = IXGBEVF_TX_CTXTDESC(tx_ring, i);
3728
3729         i++;
3730         tx_ring->next_to_use = (i < tx_ring->count) ? i : 0;
3731
3732         /* set bits to identify this as an advanced context descriptor */
3733         type_tucmd |= IXGBE_TXD_CMD_DEXT | IXGBE_ADVTXD_DTYP_CTXT;
3734
3735         context_desc->vlan_macip_lens   = cpu_to_le32(vlan_macip_lens);
3736         context_desc->fceof_saidx       = cpu_to_le32(fceof_saidx);
3737         context_desc->type_tucmd_mlhl   = cpu_to_le32(type_tucmd);
3738         context_desc->mss_l4len_idx     = cpu_to_le32(mss_l4len_idx);
3739 }
3740
3741 static int ixgbevf_tso(struct ixgbevf_ring *tx_ring,
3742                        struct ixgbevf_tx_buffer *first,
3743                        u8 *hdr_len,
3744                        struct ixgbevf_ipsec_tx_data *itd)
3745 {
3746         u32 vlan_macip_lens, type_tucmd, mss_l4len_idx;
3747         struct sk_buff *skb = first->skb;
3748         union {
3749                 struct iphdr *v4;
3750                 struct ipv6hdr *v6;
3751                 unsigned char *hdr;
3752         } ip;
3753         union {
3754                 struct tcphdr *tcp;
3755                 unsigned char *hdr;
3756         } l4;
3757         u32 paylen, l4_offset;
3758         u32 fceof_saidx = 0;
3759         int err;
3760
3761         if (skb->ip_summed != CHECKSUM_PARTIAL)
3762                 return 0;
3763
3764         if (!skb_is_gso(skb))
3765                 return 0;
3766
3767         err = skb_cow_head(skb, 0);
3768         if (err < 0)
3769                 return err;
3770
3771         if (eth_p_mpls(first->protocol))
3772                 ip.hdr = skb_inner_network_header(skb);
3773         else
3774                 ip.hdr = skb_network_header(skb);
3775         l4.hdr = skb_checksum_start(skb);
3776
3777         /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
3778         type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP;
3779
3780         /* initialize outer IP header fields */
3781         if (ip.v4->version == 4) {
3782                 unsigned char *csum_start = skb_checksum_start(skb);
3783                 unsigned char *trans_start = ip.hdr + (ip.v4->ihl * 4);
3784                 int len = csum_start - trans_start;
3785
3786                 /* IP header will have to cancel out any data that
3787                  * is not a part of the outer IP header, so set to
3788                  * a reverse csum if needed, else init check to 0.
3789                  */
3790                 ip.v4->check = (skb_shinfo(skb)->gso_type & SKB_GSO_PARTIAL) ?
3791                                            csum_fold(csum_partial(trans_start,
3792                                                                   len, 0)) : 0;
3793                 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
3794
3795                 ip.v4->tot_len = 0;
3796                 first->tx_flags |= IXGBE_TX_FLAGS_TSO |
3797                                    IXGBE_TX_FLAGS_CSUM |
3798                                    IXGBE_TX_FLAGS_IPV4;
3799         } else {
3800                 ip.v6->payload_len = 0;
3801                 first->tx_flags |= IXGBE_TX_FLAGS_TSO |
3802                                    IXGBE_TX_FLAGS_CSUM;
3803         }
3804
3805         /* determine offset of inner transport header */
3806         l4_offset = l4.hdr - skb->data;
3807
3808         /* compute length of segmentation header */
3809         *hdr_len = (l4.tcp->doff * 4) + l4_offset;
3810
3811         /* remove payload length from inner checksum */
3812         paylen = skb->len - l4_offset;
3813         csum_replace_by_diff(&l4.tcp->check, htonl(paylen));
3814
3815         /* update gso size and bytecount with header size */
3816         first->gso_segs = skb_shinfo(skb)->gso_segs;
3817         first->bytecount += (first->gso_segs - 1) * *hdr_len;
3818
3819         /* mss_l4len_id: use 1 as index for TSO */
3820         mss_l4len_idx = (*hdr_len - l4_offset) << IXGBE_ADVTXD_L4LEN_SHIFT;
3821         mss_l4len_idx |= skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT;
3822         mss_l4len_idx |= (1u << IXGBE_ADVTXD_IDX_SHIFT);
3823
3824         fceof_saidx |= itd->pfsa;
3825         type_tucmd |= itd->flags | itd->trailer_len;
3826
3827         /* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */
3828         vlan_macip_lens = l4.hdr - ip.hdr;
3829         vlan_macip_lens |= (ip.hdr - skb->data) << IXGBE_ADVTXD_MACLEN_SHIFT;
3830         vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
3831
3832         ixgbevf_tx_ctxtdesc(tx_ring, vlan_macip_lens, fceof_saidx, type_tucmd,
3833                             mss_l4len_idx);
3834
3835         return 1;
3836 }
3837
3838 static inline bool ixgbevf_ipv6_csum_is_sctp(struct sk_buff *skb)
3839 {
3840         unsigned int offset = 0;
3841
3842         ipv6_find_hdr(skb, &offset, IPPROTO_SCTP, NULL, NULL);
3843
3844         return offset == skb_checksum_start_offset(skb);
3845 }
3846
3847 static void ixgbevf_tx_csum(struct ixgbevf_ring *tx_ring,
3848                             struct ixgbevf_tx_buffer *first,
3849                             struct ixgbevf_ipsec_tx_data *itd)
3850 {
3851         struct sk_buff *skb = first->skb;
3852         u32 vlan_macip_lens = 0;
3853         u32 fceof_saidx = 0;
3854         u32 type_tucmd = 0;
3855
3856         if (skb->ip_summed != CHECKSUM_PARTIAL)
3857                 goto no_csum;
3858
3859         switch (skb->csum_offset) {
3860         case offsetof(struct tcphdr, check):
3861                 type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP;
3862                 /* fall through */
3863         case offsetof(struct udphdr, check):
3864                 break;
3865         case offsetof(struct sctphdr, checksum):
3866                 /* validate that this is actually an SCTP request */
3867                 if (((first->protocol == htons(ETH_P_IP)) &&
3868                      (ip_hdr(skb)->protocol == IPPROTO_SCTP)) ||
3869                     ((first->protocol == htons(ETH_P_IPV6)) &&
3870                      ixgbevf_ipv6_csum_is_sctp(skb))) {
3871                         type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_SCTP;
3872                         break;
3873                 }
3874                 /* fall through */
3875         default:
3876                 skb_checksum_help(skb);
3877                 goto no_csum;
3878         }
3879
3880         if (first->protocol == htons(ETH_P_IP))
3881                 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
3882
3883         /* update TX checksum flag */
3884         first->tx_flags |= IXGBE_TX_FLAGS_CSUM;
3885         vlan_macip_lens = skb_checksum_start_offset(skb) -
3886                           skb_network_offset(skb);
3887 no_csum:
3888         /* vlan_macip_lens: MACLEN, VLAN tag */
3889         vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
3890         vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
3891
3892         fceof_saidx |= itd->pfsa;
3893         type_tucmd |= itd->flags | itd->trailer_len;
3894
3895         ixgbevf_tx_ctxtdesc(tx_ring, vlan_macip_lens,
3896                             fceof_saidx, type_tucmd, 0);
3897 }
3898
3899 static __le32 ixgbevf_tx_cmd_type(u32 tx_flags)
3900 {
3901         /* set type for advanced descriptor with frame checksum insertion */
3902         __le32 cmd_type = cpu_to_le32(IXGBE_ADVTXD_DTYP_DATA |
3903                                       IXGBE_ADVTXD_DCMD_IFCS |
3904                                       IXGBE_ADVTXD_DCMD_DEXT);
3905
3906         /* set HW VLAN bit if VLAN is present */
3907         if (tx_flags & IXGBE_TX_FLAGS_VLAN)
3908                 cmd_type |= cpu_to_le32(IXGBE_ADVTXD_DCMD_VLE);
3909
3910         /* set segmentation enable bits for TSO/FSO */
3911         if (tx_flags & IXGBE_TX_FLAGS_TSO)
3912                 cmd_type |= cpu_to_le32(IXGBE_ADVTXD_DCMD_TSE);
3913
3914         return cmd_type;
3915 }
3916
3917 static void ixgbevf_tx_olinfo_status(union ixgbe_adv_tx_desc *tx_desc,
3918                                      u32 tx_flags, unsigned int paylen)
3919 {
3920         __le32 olinfo_status = cpu_to_le32(paylen << IXGBE_ADVTXD_PAYLEN_SHIFT);
3921
3922         /* enable L4 checksum for TSO and TX checksum offload */
3923         if (tx_flags & IXGBE_TX_FLAGS_CSUM)
3924                 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_POPTS_TXSM);
3925
3926         /* enble IPv4 checksum for TSO */
3927         if (tx_flags & IXGBE_TX_FLAGS_IPV4)
3928                 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_POPTS_IXSM);
3929
3930         /* enable IPsec */
3931         if (tx_flags & IXGBE_TX_FLAGS_IPSEC)
3932                 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_POPTS_IPSEC);
3933
3934         /* use index 1 context for TSO/FSO/FCOE/IPSEC */
3935         if (tx_flags & (IXGBE_TX_FLAGS_TSO | IXGBE_TX_FLAGS_IPSEC))
3936                 olinfo_status |= cpu_to_le32(1u << IXGBE_ADVTXD_IDX_SHIFT);
3937
3938         /* Check Context must be set if Tx switch is enabled, which it
3939          * always is for case where virtual functions are running
3940          */
3941         olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_CC);
3942
3943         tx_desc->read.olinfo_status = olinfo_status;
3944 }
3945
3946 static void ixgbevf_tx_map(struct ixgbevf_ring *tx_ring,
3947                            struct ixgbevf_tx_buffer *first,
3948                            const u8 hdr_len)
3949 {
3950         struct sk_buff *skb = first->skb;
3951         struct ixgbevf_tx_buffer *tx_buffer;
3952         union ixgbe_adv_tx_desc *tx_desc;
3953         struct skb_frag_struct *frag;
3954         dma_addr_t dma;
3955         unsigned int data_len, size;
3956         u32 tx_flags = first->tx_flags;
3957         __le32 cmd_type = ixgbevf_tx_cmd_type(tx_flags);
3958         u16 i = tx_ring->next_to_use;
3959
3960         tx_desc = IXGBEVF_TX_DESC(tx_ring, i);
3961
3962         ixgbevf_tx_olinfo_status(tx_desc, tx_flags, skb->len - hdr_len);
3963
3964         size = skb_headlen(skb);
3965         data_len = skb->data_len;
3966
3967         dma = dma_map_single(tx_ring->dev, skb->data, size, DMA_TO_DEVICE);
3968
3969         tx_buffer = first;
3970
3971         for (frag = &skb_shinfo(skb)->frags[0];; frag++) {
3972                 if (dma_mapping_error(tx_ring->dev, dma))
3973                         goto dma_error;
3974
3975                 /* record length, and DMA address */
3976                 dma_unmap_len_set(tx_buffer, len, size);
3977                 dma_unmap_addr_set(tx_buffer, dma, dma);
3978
3979                 tx_desc->read.buffer_addr = cpu_to_le64(dma);
3980
3981                 while (unlikely(size > IXGBE_MAX_DATA_PER_TXD)) {
3982                         tx_desc->read.cmd_type_len =
3983                                 cmd_type | cpu_to_le32(IXGBE_MAX_DATA_PER_TXD);
3984
3985                         i++;
3986                         tx_desc++;
3987                         if (i == tx_ring->count) {
3988                                 tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);
3989                                 i = 0;
3990                         }
3991                         tx_desc->read.olinfo_status = 0;
3992
3993                         dma += IXGBE_MAX_DATA_PER_TXD;
3994                         size -= IXGBE_MAX_DATA_PER_TXD;
3995
3996                         tx_desc->read.buffer_addr = cpu_to_le64(dma);
3997                 }
3998
3999                 if (likely(!data_len))
4000                         break;
4001
4002                 tx_desc->read.cmd_type_len = cmd_type | cpu_to_le32(size);
4003
4004                 i++;
4005                 tx_desc++;
4006                 if (i == tx_ring->count) {
4007                         tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);
4008                         i = 0;
4009                 }
4010                 tx_desc->read.olinfo_status = 0;
4011
4012                 size = skb_frag_size(frag);
4013                 data_len -= size;
4014
4015                 dma = skb_frag_dma_map(tx_ring->dev, frag, 0, size,
4016                                        DMA_TO_DEVICE);
4017
4018                 tx_buffer = &tx_ring->tx_buffer_info[i];
4019         }
4020
4021         /* write last descriptor with RS and EOP bits */
4022         cmd_type |= cpu_to_le32(size) | cpu_to_le32(IXGBE_TXD_CMD);
4023         tx_desc->read.cmd_type_len = cmd_type;
4024
4025         /* set the timestamp */
4026         first->time_stamp = jiffies;
4027
4028         skb_tx_timestamp(skb);
4029
4030         /* Force memory writes to complete before letting h/w know there
4031          * are new descriptors to fetch.  (Only applicable for weak-ordered
4032          * memory model archs, such as IA-64).
4033          *
4034          * We also need this memory barrier (wmb) to make certain all of the
4035          * status bits have been updated before next_to_watch is written.
4036          */
4037         wmb();
4038
4039         /* set next_to_watch value indicating a packet is present */
4040         first->next_to_watch = tx_desc;
4041
4042         i++;
4043         if (i == tx_ring->count)
4044                 i = 0;
4045
4046         tx_ring->next_to_use = i;
4047
4048         /* notify HW of packet */
4049         ixgbevf_write_tail(tx_ring, i);
4050
4051         return;
4052 dma_error:
4053         dev_err(tx_ring->dev, "TX DMA map failed\n");
4054         tx_buffer = &tx_ring->tx_buffer_info[i];
4055
4056         /* clear dma mappings for failed tx_buffer_info map */
4057         while (tx_buffer != first) {
4058                 if (dma_unmap_len(tx_buffer, len))
4059                         dma_unmap_page(tx_ring->dev,
4060                                        dma_unmap_addr(tx_buffer, dma),
4061                                        dma_unmap_len(tx_buffer, len),
4062                                        DMA_TO_DEVICE);
4063                 dma_unmap_len_set(tx_buffer, len, 0);
4064
4065                 if (i-- == 0)
4066                         i += tx_ring->count;
4067                 tx_buffer = &tx_ring->tx_buffer_info[i];
4068         }
4069
4070         if (dma_unmap_len(tx_buffer, len))
4071                 dma_unmap_single(tx_ring->dev,
4072                                  dma_unmap_addr(tx_buffer, dma),
4073                                  dma_unmap_len(tx_buffer, len),
4074                                  DMA_TO_DEVICE);
4075         dma_unmap_len_set(tx_buffer, len, 0);
4076
4077         dev_kfree_skb_any(tx_buffer->skb);
4078         tx_buffer->skb = NULL;
4079
4080         tx_ring->next_to_use = i;
4081 }
4082
4083 static int __ixgbevf_maybe_stop_tx(struct ixgbevf_ring *tx_ring, int size)
4084 {
4085         netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
4086         /* Herbert's original patch had:
4087          *  smp_mb__after_netif_stop_queue();
4088          * but since that doesn't exist yet, just open code it.
4089          */
4090         smp_mb();
4091
4092         /* We need to check again in a case another CPU has just
4093          * made room available.
4094          */
4095         if (likely(ixgbevf_desc_unused(tx_ring) < size))
4096                 return -EBUSY;
4097
4098         /* A reprieve! - use start_queue because it doesn't call schedule */
4099         netif_start_subqueue(tx_ring->netdev, tx_ring->queue_index);
4100         ++tx_ring->tx_stats.restart_queue;
4101
4102         return 0;
4103 }
4104
4105 static int ixgbevf_maybe_stop_tx(struct ixgbevf_ring *tx_ring, int size)
4106 {
4107         if (likely(ixgbevf_desc_unused(tx_ring) >= size))
4108                 return 0;
4109         return __ixgbevf_maybe_stop_tx(tx_ring, size);
4110 }
4111
4112 static int ixgbevf_xmit_frame_ring(struct sk_buff *skb,
4113                                    struct ixgbevf_ring *tx_ring)
4114 {
4115         struct ixgbevf_tx_buffer *first;
4116         int tso;
4117         u32 tx_flags = 0;
4118         u16 count = TXD_USE_COUNT(skb_headlen(skb));
4119         struct ixgbevf_ipsec_tx_data ipsec_tx = { 0 };
4120 #if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD
4121         unsigned short f;
4122 #endif
4123         u8 hdr_len = 0;
4124         u8 *dst_mac = skb_header_pointer(skb, 0, 0, NULL);
4125
4126         if (!dst_mac || is_link_local_ether_addr(dst_mac)) {
4127                 dev_kfree_skb_any(skb);
4128                 return NETDEV_TX_OK;
4129         }
4130
4131         /* need: 1 descriptor per page * PAGE_SIZE/IXGBE_MAX_DATA_PER_TXD,
4132          *       + 1 desc for skb_headlen/IXGBE_MAX_DATA_PER_TXD,
4133          *       + 2 desc gap to keep tail from touching head,
4134          *       + 1 desc for context descriptor,
4135          * otherwise try next time
4136          */
4137 #if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD
4138         for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
4139                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
4140 #else
4141         count += skb_shinfo(skb)->nr_frags;
4142 #endif
4143         if (ixgbevf_maybe_stop_tx(tx_ring, count + 3)) {
4144                 tx_ring->tx_stats.tx_busy++;
4145                 return NETDEV_TX_BUSY;
4146         }
4147
4148         /* record the location of the first descriptor for this packet */
4149         first = &tx_ring->tx_buffer_info[tx_ring->next_to_use];
4150         first->skb = skb;
4151         first->bytecount = skb->len;
4152         first->gso_segs = 1;
4153
4154         if (skb_vlan_tag_present(skb)) {
4155                 tx_flags |= skb_vlan_tag_get(skb);
4156                 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
4157                 tx_flags |= IXGBE_TX_FLAGS_VLAN;
4158         }
4159
4160         /* record initial flags and protocol */
4161         first->tx_flags = tx_flags;
4162         first->protocol = vlan_get_protocol(skb);
4163
4164 #ifdef CONFIG_IXGBEVF_IPSEC
4165         if (xfrm_offload(skb) && !ixgbevf_ipsec_tx(tx_ring, first, &ipsec_tx))
4166                 goto out_drop;
4167 #endif
4168         tso = ixgbevf_tso(tx_ring, first, &hdr_len, &ipsec_tx);
4169         if (tso < 0)
4170                 goto out_drop;
4171         else if (!tso)
4172                 ixgbevf_tx_csum(tx_ring, first, &ipsec_tx);
4173
4174         ixgbevf_tx_map(tx_ring, first, hdr_len);
4175
4176         ixgbevf_maybe_stop_tx(tx_ring, DESC_NEEDED);
4177
4178         return NETDEV_TX_OK;
4179
4180 out_drop:
4181         dev_kfree_skb_any(first->skb);
4182         first->skb = NULL;
4183
4184         return NETDEV_TX_OK;
4185 }
4186
4187 static netdev_tx_t ixgbevf_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
4188 {
4189         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4190         struct ixgbevf_ring *tx_ring;
4191
4192         if (skb->len <= 0) {
4193                 dev_kfree_skb_any(skb);
4194                 return NETDEV_TX_OK;
4195         }
4196
4197         /* The minimum packet size for olinfo paylen is 17 so pad the skb
4198          * in order to meet this minimum size requirement.
4199          */
4200         if (skb->len < 17) {
4201                 if (skb_padto(skb, 17))
4202                         return NETDEV_TX_OK;
4203                 skb->len = 17;
4204         }
4205
4206         tx_ring = adapter->tx_ring[skb->queue_mapping];
4207         return ixgbevf_xmit_frame_ring(skb, tx_ring);
4208 }
4209
4210 /**
4211  * ixgbevf_set_mac - Change the Ethernet Address of the NIC
4212  * @netdev: network interface device structure
4213  * @p: pointer to an address structure
4214  *
4215  * Returns 0 on success, negative on failure
4216  **/
4217 static int ixgbevf_set_mac(struct net_device *netdev, void *p)
4218 {
4219         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4220         struct ixgbe_hw *hw = &adapter->hw;
4221         struct sockaddr *addr = p;
4222         int err;
4223
4224         if (!is_valid_ether_addr(addr->sa_data))
4225                 return -EADDRNOTAVAIL;
4226
4227         spin_lock_bh(&adapter->mbx_lock);
4228
4229         err = hw->mac.ops.set_rar(hw, 0, addr->sa_data, 0);
4230
4231         spin_unlock_bh(&adapter->mbx_lock);
4232
4233         if (err)
4234                 return -EPERM;
4235
4236         ether_addr_copy(hw->mac.addr, addr->sa_data);
4237         ether_addr_copy(hw->mac.perm_addr, addr->sa_data);
4238         ether_addr_copy(netdev->dev_addr, addr->sa_data);
4239
4240         return 0;
4241 }
4242
4243 /**
4244  * ixgbevf_change_mtu - Change the Maximum Transfer Unit
4245  * @netdev: network interface device structure
4246  * @new_mtu: new value for maximum frame size
4247  *
4248  * Returns 0 on success, negative on failure
4249  **/
4250 static int ixgbevf_change_mtu(struct net_device *netdev, int new_mtu)
4251 {
4252         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4253         struct ixgbe_hw *hw = &adapter->hw;
4254         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
4255         int ret;
4256
4257         /* prevent MTU being changed to a size unsupported by XDP */
4258         if (adapter->xdp_prog) {
4259                 dev_warn(&adapter->pdev->dev, "MTU cannot be changed while XDP program is loaded\n");
4260                 return -EPERM;
4261         }
4262
4263         spin_lock_bh(&adapter->mbx_lock);
4264         /* notify the PF of our intent to use this size of frame */
4265         ret = hw->mac.ops.set_rlpml(hw, max_frame);
4266         spin_unlock_bh(&adapter->mbx_lock);
4267         if (ret)
4268                 return -EINVAL;
4269
4270         hw_dbg(hw, "changing MTU from %d to %d\n",
4271                netdev->mtu, new_mtu);
4272
4273         /* must set new MTU before calling down or up */
4274         netdev->mtu = new_mtu;
4275
4276         if (netif_running(netdev))
4277                 ixgbevf_reinit_locked(adapter);
4278
4279         return 0;
4280 }
4281
4282 static int ixgbevf_suspend(struct pci_dev *pdev, pm_message_t state)
4283 {
4284         struct net_device *netdev = pci_get_drvdata(pdev);
4285         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4286 #ifdef CONFIG_PM
4287         int retval = 0;
4288 #endif
4289
4290         rtnl_lock();
4291         netif_device_detach(netdev);
4292
4293         if (netif_running(netdev))
4294                 ixgbevf_close_suspend(adapter);
4295
4296         ixgbevf_clear_interrupt_scheme(adapter);
4297         rtnl_unlock();
4298
4299 #ifdef CONFIG_PM
4300         retval = pci_save_state(pdev);
4301         if (retval)
4302                 return retval;
4303
4304 #endif
4305         if (!test_and_set_bit(__IXGBEVF_DISABLED, &adapter->state))
4306                 pci_disable_device(pdev);
4307
4308         return 0;
4309 }
4310
4311 #ifdef CONFIG_PM
4312 static int ixgbevf_resume(struct pci_dev *pdev)
4313 {
4314         struct net_device *netdev = pci_get_drvdata(pdev);
4315         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4316         u32 err;
4317
4318         pci_restore_state(pdev);
4319         /* pci_restore_state clears dev->state_saved so call
4320          * pci_save_state to restore it.
4321          */
4322         pci_save_state(pdev);
4323
4324         err = pci_enable_device_mem(pdev);
4325         if (err) {
4326                 dev_err(&pdev->dev, "Cannot enable PCI device from suspend\n");
4327                 return err;
4328         }
4329
4330         adapter->hw.hw_addr = adapter->io_addr;
4331         smp_mb__before_atomic();
4332         clear_bit(__IXGBEVF_DISABLED, &adapter->state);
4333         pci_set_master(pdev);
4334
4335         ixgbevf_reset(adapter);
4336
4337         rtnl_lock();
4338         err = ixgbevf_init_interrupt_scheme(adapter);
4339         if (!err && netif_running(netdev))
4340                 err = ixgbevf_open(netdev);
4341         rtnl_unlock();
4342         if (err)
4343                 return err;
4344
4345         netif_device_attach(netdev);
4346
4347         return err;
4348 }
4349
4350 #endif /* CONFIG_PM */
4351 static void ixgbevf_shutdown(struct pci_dev *pdev)
4352 {
4353         ixgbevf_suspend(pdev, PMSG_SUSPEND);
4354 }
4355
4356 static void ixgbevf_get_tx_ring_stats(struct rtnl_link_stats64 *stats,
4357                                       const struct ixgbevf_ring *ring)
4358 {
4359         u64 bytes, packets;
4360         unsigned int start;
4361
4362         if (ring) {
4363                 do {
4364                         start = u64_stats_fetch_begin_irq(&ring->syncp);
4365                         bytes = ring->stats.bytes;
4366                         packets = ring->stats.packets;
4367                 } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
4368                 stats->tx_bytes += bytes;
4369                 stats->tx_packets += packets;
4370         }
4371 }
4372
4373 static void ixgbevf_get_stats(struct net_device *netdev,
4374                               struct rtnl_link_stats64 *stats)
4375 {
4376         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4377         unsigned int start;
4378         u64 bytes, packets;
4379         const struct ixgbevf_ring *ring;
4380         int i;
4381
4382         ixgbevf_update_stats(adapter);
4383
4384         stats->multicast = adapter->stats.vfmprc - adapter->stats.base_vfmprc;
4385
4386         rcu_read_lock();
4387         for (i = 0; i < adapter->num_rx_queues; i++) {
4388                 ring = adapter->rx_ring[i];
4389                 do {
4390                         start = u64_stats_fetch_begin_irq(&ring->syncp);
4391                         bytes = ring->stats.bytes;
4392                         packets = ring->stats.packets;
4393                 } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
4394                 stats->rx_bytes += bytes;
4395                 stats->rx_packets += packets;
4396         }
4397
4398         for (i = 0; i < adapter->num_tx_queues; i++) {
4399                 ring = adapter->tx_ring[i];
4400                 ixgbevf_get_tx_ring_stats(stats, ring);
4401         }
4402
4403         for (i = 0; i < adapter->num_xdp_queues; i++) {
4404                 ring = adapter->xdp_ring[i];
4405                 ixgbevf_get_tx_ring_stats(stats, ring);
4406         }
4407         rcu_read_unlock();
4408 }
4409
4410 #define IXGBEVF_MAX_MAC_HDR_LEN         127
4411 #define IXGBEVF_MAX_NETWORK_HDR_LEN     511
4412
4413 static netdev_features_t
4414 ixgbevf_features_check(struct sk_buff *skb, struct net_device *dev,
4415                        netdev_features_t features)
4416 {
4417         unsigned int network_hdr_len, mac_hdr_len;
4418
4419         /* Make certain the headers can be described by a context descriptor */
4420         mac_hdr_len = skb_network_header(skb) - skb->data;
4421         if (unlikely(mac_hdr_len > IXGBEVF_MAX_MAC_HDR_LEN))
4422                 return features & ~(NETIF_F_HW_CSUM |
4423                                     NETIF_F_SCTP_CRC |
4424                                     NETIF_F_HW_VLAN_CTAG_TX |
4425                                     NETIF_F_TSO |
4426                                     NETIF_F_TSO6);
4427
4428         network_hdr_len = skb_checksum_start(skb) - skb_network_header(skb);
4429         if (unlikely(network_hdr_len >  IXGBEVF_MAX_NETWORK_HDR_LEN))
4430                 return features & ~(NETIF_F_HW_CSUM |
4431                                     NETIF_F_SCTP_CRC |
4432                                     NETIF_F_TSO |
4433                                     NETIF_F_TSO6);
4434
4435         /* We can only support IPV4 TSO in tunnels if we can mangle the
4436          * inner IP ID field, so strip TSO if MANGLEID is not supported.
4437          */
4438         if (skb->encapsulation && !(features & NETIF_F_TSO_MANGLEID))
4439                 features &= ~NETIF_F_TSO;
4440
4441         return features;
4442 }
4443
4444 static int ixgbevf_xdp_setup(struct net_device *dev, struct bpf_prog *prog)
4445 {
4446         int i, frame_size = dev->mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
4447         struct ixgbevf_adapter *adapter = netdev_priv(dev);
4448         struct bpf_prog *old_prog;
4449
4450         /* verify ixgbevf ring attributes are sufficient for XDP */
4451         for (i = 0; i < adapter->num_rx_queues; i++) {
4452                 struct ixgbevf_ring *ring = adapter->rx_ring[i];
4453
4454                 if (frame_size > ixgbevf_rx_bufsz(ring))
4455                         return -EINVAL;
4456         }
4457
4458         old_prog = xchg(&adapter->xdp_prog, prog);
4459
4460         /* If transitioning XDP modes reconfigure rings */
4461         if (!!prog != !!old_prog) {
4462                 /* Hardware has to reinitialize queues and interrupts to
4463                  * match packet buffer alignment. Unfortunately, the
4464                  * hardware is not flexible enough to do this dynamically.
4465                  */
4466                 if (netif_running(dev))
4467                         ixgbevf_close(dev);
4468
4469                 ixgbevf_clear_interrupt_scheme(adapter);
4470                 ixgbevf_init_interrupt_scheme(adapter);
4471
4472                 if (netif_running(dev))
4473                         ixgbevf_open(dev);
4474         } else {
4475                 for (i = 0; i < adapter->num_rx_queues; i++)
4476                         xchg(&adapter->rx_ring[i]->xdp_prog, adapter->xdp_prog);
4477         }
4478
4479         if (old_prog)
4480                 bpf_prog_put(old_prog);
4481
4482         return 0;
4483 }
4484
4485 static int ixgbevf_xdp(struct net_device *dev, struct netdev_bpf *xdp)
4486 {
4487         struct ixgbevf_adapter *adapter = netdev_priv(dev);
4488
4489         switch (xdp->command) {
4490         case XDP_SETUP_PROG:
4491                 return ixgbevf_xdp_setup(dev, xdp->prog);
4492         case XDP_QUERY_PROG:
4493                 xdp->prog_id = adapter->xdp_prog ?
4494                                adapter->xdp_prog->aux->id : 0;
4495                 return 0;
4496         default:
4497                 return -EINVAL;
4498         }
4499 }
4500
4501 static const struct net_device_ops ixgbevf_netdev_ops = {
4502         .ndo_open               = ixgbevf_open,
4503         .ndo_stop               = ixgbevf_close,
4504         .ndo_start_xmit         = ixgbevf_xmit_frame,
4505         .ndo_set_rx_mode        = ixgbevf_set_rx_mode,
4506         .ndo_get_stats64        = ixgbevf_get_stats,
4507         .ndo_validate_addr      = eth_validate_addr,
4508         .ndo_set_mac_address    = ixgbevf_set_mac,
4509         .ndo_change_mtu         = ixgbevf_change_mtu,
4510         .ndo_tx_timeout         = ixgbevf_tx_timeout,
4511         .ndo_vlan_rx_add_vid    = ixgbevf_vlan_rx_add_vid,
4512         .ndo_vlan_rx_kill_vid   = ixgbevf_vlan_rx_kill_vid,
4513         .ndo_features_check     = ixgbevf_features_check,
4514         .ndo_bpf                = ixgbevf_xdp,
4515 };
4516
4517 static void ixgbevf_assign_netdev_ops(struct net_device *dev)
4518 {
4519         dev->netdev_ops = &ixgbevf_netdev_ops;
4520         ixgbevf_set_ethtool_ops(dev);
4521         dev->watchdog_timeo = 5 * HZ;
4522 }
4523
4524 /**
4525  * ixgbevf_probe - Device Initialization Routine
4526  * @pdev: PCI device information struct
4527  * @ent: entry in ixgbevf_pci_tbl
4528  *
4529  * Returns 0 on success, negative on failure
4530  *
4531  * ixgbevf_probe initializes an adapter identified by a pci_dev structure.
4532  * The OS initialization, configuring of the adapter private structure,
4533  * and a hardware reset occur.
4534  **/
4535 static int ixgbevf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
4536 {
4537         struct net_device *netdev;
4538         struct ixgbevf_adapter *adapter = NULL;
4539         struct ixgbe_hw *hw = NULL;
4540         const struct ixgbevf_info *ii = ixgbevf_info_tbl[ent->driver_data];
4541         int err, pci_using_dac;
4542         bool disable_dev = false;
4543
4544         err = pci_enable_device(pdev);
4545         if (err)
4546                 return err;
4547
4548         if (!dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) {
4549                 pci_using_dac = 1;
4550         } else {
4551                 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
4552                 if (err) {
4553                         dev_err(&pdev->dev, "No usable DMA configuration, aborting\n");
4554                         goto err_dma;
4555                 }
4556                 pci_using_dac = 0;
4557         }
4558
4559         err = pci_request_regions(pdev, ixgbevf_driver_name);
4560         if (err) {
4561                 dev_err(&pdev->dev, "pci_request_regions failed 0x%x\n", err);
4562                 goto err_pci_reg;
4563         }
4564
4565         pci_set_master(pdev);
4566
4567         netdev = alloc_etherdev_mq(sizeof(struct ixgbevf_adapter),
4568                                    MAX_TX_QUEUES);
4569         if (!netdev) {
4570                 err = -ENOMEM;
4571                 goto err_alloc_etherdev;
4572         }
4573
4574         SET_NETDEV_DEV(netdev, &pdev->dev);
4575
4576         adapter = netdev_priv(netdev);
4577
4578         adapter->netdev = netdev;
4579         adapter->pdev = pdev;
4580         hw = &adapter->hw;
4581         hw->back = adapter;
4582         adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
4583
4584         /* call save state here in standalone driver because it relies on
4585          * adapter struct to exist, and needs to call netdev_priv
4586          */
4587         pci_save_state(pdev);
4588
4589         hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
4590                               pci_resource_len(pdev, 0));
4591         adapter->io_addr = hw->hw_addr;
4592         if (!hw->hw_addr) {
4593                 err = -EIO;
4594                 goto err_ioremap;
4595         }
4596
4597         ixgbevf_assign_netdev_ops(netdev);
4598
4599         /* Setup HW API */
4600         memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
4601         hw->mac.type  = ii->mac;
4602
4603         memcpy(&hw->mbx.ops, &ixgbevf_mbx_ops,
4604                sizeof(struct ixgbe_mbx_operations));
4605
4606         /* setup the private structure */
4607         err = ixgbevf_sw_init(adapter);
4608         if (err)
4609                 goto err_sw_init;
4610
4611         /* The HW MAC address was set and/or determined in sw_init */
4612         if (!is_valid_ether_addr(netdev->dev_addr)) {
4613                 pr_err("invalid MAC address\n");
4614                 err = -EIO;
4615                 goto err_sw_init;
4616         }
4617
4618         netdev->hw_features = NETIF_F_SG |
4619                               NETIF_F_TSO |
4620                               NETIF_F_TSO6 |
4621                               NETIF_F_RXCSUM |
4622                               NETIF_F_HW_CSUM |
4623                               NETIF_F_SCTP_CRC;
4624
4625 #define IXGBEVF_GSO_PARTIAL_FEATURES (NETIF_F_GSO_GRE | \
4626                                       NETIF_F_GSO_GRE_CSUM | \
4627                                       NETIF_F_GSO_IPXIP4 | \
4628                                       NETIF_F_GSO_IPXIP6 | \
4629                                       NETIF_F_GSO_UDP_TUNNEL | \
4630                                       NETIF_F_GSO_UDP_TUNNEL_CSUM)
4631
4632         netdev->gso_partial_features = IXGBEVF_GSO_PARTIAL_FEATURES;
4633         netdev->hw_features |= NETIF_F_GSO_PARTIAL |
4634                                IXGBEVF_GSO_PARTIAL_FEATURES;
4635
4636         netdev->features = netdev->hw_features;
4637
4638         if (pci_using_dac)
4639                 netdev->features |= NETIF_F_HIGHDMA;
4640
4641         netdev->vlan_features |= netdev->features | NETIF_F_TSO_MANGLEID;
4642         netdev->mpls_features |= NETIF_F_SG |
4643                                  NETIF_F_TSO |
4644                                  NETIF_F_TSO6 |
4645                                  NETIF_F_HW_CSUM;
4646         netdev->mpls_features |= IXGBEVF_GSO_PARTIAL_FEATURES;
4647         netdev->hw_enc_features |= netdev->vlan_features;
4648
4649         /* set this bit last since it cannot be part of vlan_features */
4650         netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER |
4651                             NETIF_F_HW_VLAN_CTAG_RX |
4652                             NETIF_F_HW_VLAN_CTAG_TX;
4653
4654         netdev->priv_flags |= IFF_UNICAST_FLT;
4655
4656         /* MTU range: 68 - 1504 or 9710 */
4657         netdev->min_mtu = ETH_MIN_MTU;
4658         switch (adapter->hw.api_version) {
4659         case ixgbe_mbox_api_11:
4660         case ixgbe_mbox_api_12:
4661         case ixgbe_mbox_api_13:
4662         case ixgbe_mbox_api_14:
4663                 netdev->max_mtu = IXGBE_MAX_JUMBO_FRAME_SIZE -
4664                                   (ETH_HLEN + ETH_FCS_LEN);
4665                 break;
4666         default:
4667                 if (adapter->hw.mac.type != ixgbe_mac_82599_vf)
4668                         netdev->max_mtu = IXGBE_MAX_JUMBO_FRAME_SIZE -
4669                                           (ETH_HLEN + ETH_FCS_LEN);
4670                 else
4671                         netdev->max_mtu = ETH_DATA_LEN + ETH_FCS_LEN;
4672                 break;
4673         }
4674
4675         if (IXGBE_REMOVED(hw->hw_addr)) {
4676                 err = -EIO;
4677                 goto err_sw_init;
4678         }
4679
4680         timer_setup(&adapter->service_timer, ixgbevf_service_timer, 0);
4681
4682         INIT_WORK(&adapter->service_task, ixgbevf_service_task);
4683         set_bit(__IXGBEVF_SERVICE_INITED, &adapter->state);
4684         clear_bit(__IXGBEVF_SERVICE_SCHED, &adapter->state);
4685
4686         err = ixgbevf_init_interrupt_scheme(adapter);
4687         if (err)
4688                 goto err_sw_init;
4689
4690         strcpy(netdev->name, "eth%d");
4691
4692         err = register_netdev(netdev);
4693         if (err)
4694                 goto err_register;
4695
4696         pci_set_drvdata(pdev, netdev);
4697         netif_carrier_off(netdev);
4698         ixgbevf_init_ipsec_offload(adapter);
4699
4700         ixgbevf_init_last_counter_stats(adapter);
4701
4702         /* print the VF info */
4703         dev_info(&pdev->dev, "%pM\n", netdev->dev_addr);
4704         dev_info(&pdev->dev, "MAC: %d\n", hw->mac.type);
4705
4706         switch (hw->mac.type) {
4707         case ixgbe_mac_X550_vf:
4708                 dev_info(&pdev->dev, "Intel(R) X550 Virtual Function\n");
4709                 break;
4710         case ixgbe_mac_X540_vf:
4711                 dev_info(&pdev->dev, "Intel(R) X540 Virtual Function\n");
4712                 break;
4713         case ixgbe_mac_82599_vf:
4714         default:
4715                 dev_info(&pdev->dev, "Intel(R) 82599 Virtual Function\n");
4716                 break;
4717         }
4718
4719         return 0;
4720
4721 err_register:
4722         ixgbevf_clear_interrupt_scheme(adapter);
4723 err_sw_init:
4724         ixgbevf_reset_interrupt_capability(adapter);
4725         iounmap(adapter->io_addr);
4726         kfree(adapter->rss_key);
4727 err_ioremap:
4728         disable_dev = !test_and_set_bit(__IXGBEVF_DISABLED, &adapter->state);
4729         free_netdev(netdev);
4730 err_alloc_etherdev:
4731         pci_release_regions(pdev);
4732 err_pci_reg:
4733 err_dma:
4734         if (!adapter || disable_dev)
4735                 pci_disable_device(pdev);
4736         return err;
4737 }
4738
4739 /**
4740  * ixgbevf_remove - Device Removal Routine
4741  * @pdev: PCI device information struct
4742  *
4743  * ixgbevf_remove is called by the PCI subsystem to alert the driver
4744  * that it should release a PCI device.  The could be caused by a
4745  * Hot-Plug event, or because the driver is going to be removed from
4746  * memory.
4747  **/
4748 static void ixgbevf_remove(struct pci_dev *pdev)
4749 {
4750         struct net_device *netdev = pci_get_drvdata(pdev);
4751         struct ixgbevf_adapter *adapter;
4752         bool disable_dev;
4753
4754         if (!netdev)
4755                 return;
4756
4757         adapter = netdev_priv(netdev);
4758
4759         set_bit(__IXGBEVF_REMOVING, &adapter->state);
4760         cancel_work_sync(&adapter->service_task);
4761
4762         if (netdev->reg_state == NETREG_REGISTERED)
4763                 unregister_netdev(netdev);
4764
4765         ixgbevf_stop_ipsec_offload(adapter);
4766         ixgbevf_clear_interrupt_scheme(adapter);
4767         ixgbevf_reset_interrupt_capability(adapter);
4768
4769         iounmap(adapter->io_addr);
4770         pci_release_regions(pdev);
4771
4772         hw_dbg(&adapter->hw, "Remove complete\n");
4773
4774         kfree(adapter->rss_key);
4775         disable_dev = !test_and_set_bit(__IXGBEVF_DISABLED, &adapter->state);
4776         free_netdev(netdev);
4777
4778         if (disable_dev)
4779                 pci_disable_device(pdev);
4780 }
4781
4782 /**
4783  * ixgbevf_io_error_detected - called when PCI error is detected
4784  * @pdev: Pointer to PCI device
4785  * @state: The current pci connection state
4786  *
4787  * This function is called after a PCI bus error affecting
4788  * this device has been detected.
4789  **/
4790 static pci_ers_result_t ixgbevf_io_error_detected(struct pci_dev *pdev,
4791                                                   pci_channel_state_t state)
4792 {
4793         struct net_device *netdev = pci_get_drvdata(pdev);
4794         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4795
4796         if (!test_bit(__IXGBEVF_SERVICE_INITED, &adapter->state))
4797                 return PCI_ERS_RESULT_DISCONNECT;
4798
4799         rtnl_lock();
4800         netif_device_detach(netdev);
4801
4802         if (netif_running(netdev))
4803                 ixgbevf_close_suspend(adapter);
4804
4805         if (state == pci_channel_io_perm_failure) {
4806                 rtnl_unlock();
4807                 return PCI_ERS_RESULT_DISCONNECT;
4808         }
4809
4810         if (!test_and_set_bit(__IXGBEVF_DISABLED, &adapter->state))
4811                 pci_disable_device(pdev);
4812         rtnl_unlock();
4813
4814         /* Request a slot slot reset. */
4815         return PCI_ERS_RESULT_NEED_RESET;
4816 }
4817
4818 /**
4819  * ixgbevf_io_slot_reset - called after the pci bus has been reset.
4820  * @pdev: Pointer to PCI device
4821  *
4822  * Restart the card from scratch, as if from a cold-boot. Implementation
4823  * resembles the first-half of the ixgbevf_resume routine.
4824  **/
4825 static pci_ers_result_t ixgbevf_io_slot_reset(struct pci_dev *pdev)
4826 {
4827         struct net_device *netdev = pci_get_drvdata(pdev);
4828         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4829
4830         if (pci_enable_device_mem(pdev)) {
4831                 dev_err(&pdev->dev,
4832                         "Cannot re-enable PCI device after reset.\n");
4833                 return PCI_ERS_RESULT_DISCONNECT;
4834         }
4835
4836         adapter->hw.hw_addr = adapter->io_addr;
4837         smp_mb__before_atomic();
4838         clear_bit(__IXGBEVF_DISABLED, &adapter->state);
4839         pci_set_master(pdev);
4840
4841         ixgbevf_reset(adapter);
4842
4843         return PCI_ERS_RESULT_RECOVERED;
4844 }
4845
4846 /**
4847  * ixgbevf_io_resume - called when traffic can start flowing again.
4848  * @pdev: Pointer to PCI device
4849  *
4850  * This callback is called when the error recovery driver tells us that
4851  * its OK to resume normal operation. Implementation resembles the
4852  * second-half of the ixgbevf_resume routine.
4853  **/
4854 static void ixgbevf_io_resume(struct pci_dev *pdev)
4855 {
4856         struct net_device *netdev = pci_get_drvdata(pdev);
4857
4858         rtnl_lock();
4859         if (netif_running(netdev))
4860                 ixgbevf_open(netdev);
4861
4862         netif_device_attach(netdev);
4863         rtnl_unlock();
4864 }
4865
4866 /* PCI Error Recovery (ERS) */
4867 static const struct pci_error_handlers ixgbevf_err_handler = {
4868         .error_detected = ixgbevf_io_error_detected,
4869         .slot_reset = ixgbevf_io_slot_reset,
4870         .resume = ixgbevf_io_resume,
4871 };
4872
4873 static struct pci_driver ixgbevf_driver = {
4874         .name           = ixgbevf_driver_name,
4875         .id_table       = ixgbevf_pci_tbl,
4876         .probe          = ixgbevf_probe,
4877         .remove         = ixgbevf_remove,
4878 #ifdef CONFIG_PM
4879         /* Power Management Hooks */
4880         .suspend        = ixgbevf_suspend,
4881         .resume         = ixgbevf_resume,
4882 #endif
4883         .shutdown       = ixgbevf_shutdown,
4884         .err_handler    = &ixgbevf_err_handler
4885 };
4886
4887 /**
4888  * ixgbevf_init_module - Driver Registration Routine
4889  *
4890  * ixgbevf_init_module is the first routine called when the driver is
4891  * loaded. All it does is register with the PCI subsystem.
4892  **/
4893 static int __init ixgbevf_init_module(void)
4894 {
4895         pr_info("%s - version %s\n", ixgbevf_driver_string,
4896                 ixgbevf_driver_version);
4897
4898         pr_info("%s\n", ixgbevf_copyright);
4899         ixgbevf_wq = create_singlethread_workqueue(ixgbevf_driver_name);
4900         if (!ixgbevf_wq) {
4901                 pr_err("%s: Failed to create workqueue\n", ixgbevf_driver_name);
4902                 return -ENOMEM;
4903         }
4904
4905         return pci_register_driver(&ixgbevf_driver);
4906 }
4907
4908 module_init(ixgbevf_init_module);
4909
4910 /**
4911  * ixgbevf_exit_module - Driver Exit Cleanup Routine
4912  *
4913  * ixgbevf_exit_module is called just before the driver is removed
4914  * from memory.
4915  **/
4916 static void __exit ixgbevf_exit_module(void)
4917 {
4918         pci_unregister_driver(&ixgbevf_driver);
4919         if (ixgbevf_wq) {
4920                 destroy_workqueue(ixgbevf_wq);
4921                 ixgbevf_wq = NULL;
4922         }
4923 }
4924
4925 #ifdef DEBUG
4926 /**
4927  * ixgbevf_get_hw_dev_name - return device name string
4928  * used by hardware layer to print debugging information
4929  * @hw: pointer to private hardware struct
4930  **/
4931 char *ixgbevf_get_hw_dev_name(struct ixgbe_hw *hw)
4932 {
4933         struct ixgbevf_adapter *adapter = hw->back;
4934
4935         return adapter->netdev->name;
4936 }
4937
4938 #endif
4939 module_exit(ixgbevf_exit_module);
4940
4941 /* ixgbevf_main.c */