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