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