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         xdp_prog = READ_ONCE(rx_ring->xdp_prog);
1058
1059         if (!xdp_prog)
1060                 goto xdp_out;
1061
1062         act = bpf_prog_run_xdp(xdp_prog, xdp);
1063         switch (act) {
1064         case XDP_PASS:
1065                 break;
1066         case XDP_TX:
1067                 xdp_ring = adapter->xdp_ring[rx_ring->queue_index];
1068                 result = ixgbevf_xmit_xdp_ring(xdp_ring, xdp);
1069                 if (result == IXGBEVF_XDP_CONSUMED)
1070                         goto out_failure;
1071                 break;
1072         default:
1073                 bpf_warn_invalid_xdp_action(act);
1074                 fallthrough;
1075         case XDP_ABORTED:
1076 out_failure:
1077                 trace_xdp_exception(rx_ring->netdev, xdp_prog, act);
1078                 fallthrough; /* handle aborts by dropping packet */
1079         case XDP_DROP:
1080                 result = IXGBEVF_XDP_CONSUMED;
1081                 break;
1082         }
1083 xdp_out:
1084         return ERR_PTR(-result);
1085 }
1086
1087 static unsigned int ixgbevf_rx_frame_truesize(struct ixgbevf_ring *rx_ring,
1088                                               unsigned int size)
1089 {
1090         unsigned int truesize;
1091
1092 #if (PAGE_SIZE < 8192)
1093         truesize = ixgbevf_rx_pg_size(rx_ring) / 2; /* Must be power-of-2 */
1094 #else
1095         truesize = ring_uses_build_skb(rx_ring) ?
1096                 SKB_DATA_ALIGN(IXGBEVF_SKB_PAD + size) +
1097                 SKB_DATA_ALIGN(sizeof(struct skb_shared_info)) :
1098                 SKB_DATA_ALIGN(size);
1099 #endif
1100         return truesize;
1101 }
1102
1103 static void ixgbevf_rx_buffer_flip(struct ixgbevf_ring *rx_ring,
1104                                    struct ixgbevf_rx_buffer *rx_buffer,
1105                                    unsigned int size)
1106 {
1107         unsigned int truesize = ixgbevf_rx_frame_truesize(rx_ring, size);
1108
1109 #if (PAGE_SIZE < 8192)
1110         rx_buffer->page_offset ^= truesize;
1111 #else
1112         rx_buffer->page_offset += truesize;
1113 #endif
1114 }
1115
1116 static int ixgbevf_clean_rx_irq(struct ixgbevf_q_vector *q_vector,
1117                                 struct ixgbevf_ring *rx_ring,
1118                                 int budget)
1119 {
1120         unsigned int total_rx_bytes = 0, total_rx_packets = 0, frame_sz = 0;
1121         struct ixgbevf_adapter *adapter = q_vector->adapter;
1122         u16 cleaned_count = ixgbevf_desc_unused(rx_ring);
1123         struct sk_buff *skb = rx_ring->skb;
1124         bool xdp_xmit = false;
1125         struct xdp_buff xdp;
1126
1127         /* Frame size depend on rx_ring setup when PAGE_SIZE=4K */
1128 #if (PAGE_SIZE < 8192)
1129         frame_sz = ixgbevf_rx_frame_truesize(rx_ring, 0);
1130 #endif
1131         xdp_init_buff(&xdp, frame_sz, &rx_ring->xdp_rxq);
1132
1133         while (likely(total_rx_packets < budget)) {
1134                 struct ixgbevf_rx_buffer *rx_buffer;
1135                 union ixgbe_adv_rx_desc *rx_desc;
1136                 unsigned int size;
1137
1138                 /* return some buffers to hardware, one at a time is too slow */
1139                 if (cleaned_count >= IXGBEVF_RX_BUFFER_WRITE) {
1140                         ixgbevf_alloc_rx_buffers(rx_ring, cleaned_count);
1141                         cleaned_count = 0;
1142                 }
1143
1144                 rx_desc = IXGBEVF_RX_DESC(rx_ring, rx_ring->next_to_clean);
1145                 size = le16_to_cpu(rx_desc->wb.upper.length);
1146                 if (!size)
1147                         break;
1148
1149                 /* This memory barrier is needed to keep us from reading
1150                  * any other fields out of the rx_desc until we know the
1151                  * RXD_STAT_DD bit is set
1152                  */
1153                 rmb();
1154
1155                 rx_buffer = ixgbevf_get_rx_buffer(rx_ring, size);
1156
1157                 /* retrieve a buffer from the ring */
1158                 if (!skb) {
1159                         unsigned int offset = ixgbevf_rx_offset(rx_ring);
1160                         unsigned char *hard_start;
1161
1162                         hard_start = page_address(rx_buffer->page) +
1163                                      rx_buffer->page_offset - offset;
1164                         xdp_prepare_buff(&xdp, hard_start, offset, size, true);
1165 #if (PAGE_SIZE > 4096)
1166                         /* At larger PAGE_SIZE, frame_sz depend on len size */
1167                         xdp.frame_sz = ixgbevf_rx_frame_truesize(rx_ring, size);
1168 #endif
1169                         skb = ixgbevf_run_xdp(adapter, rx_ring, &xdp);
1170                 }
1171
1172                 if (IS_ERR(skb)) {
1173                         if (PTR_ERR(skb) == -IXGBEVF_XDP_TX) {
1174                                 xdp_xmit = true;
1175                                 ixgbevf_rx_buffer_flip(rx_ring, rx_buffer,
1176                                                        size);
1177                         } else {
1178                                 rx_buffer->pagecnt_bias++;
1179                         }
1180                         total_rx_packets++;
1181                         total_rx_bytes += size;
1182                 } else if (skb) {
1183                         ixgbevf_add_rx_frag(rx_ring, rx_buffer, skb, size);
1184                 } else if (ring_uses_build_skb(rx_ring)) {
1185                         skb = ixgbevf_build_skb(rx_ring, rx_buffer,
1186                                                 &xdp, rx_desc);
1187                 } else {
1188                         skb = ixgbevf_construct_skb(rx_ring, rx_buffer,
1189                                                     &xdp, rx_desc);
1190                 }
1191
1192                 /* exit if we failed to retrieve a buffer */
1193                 if (!skb) {
1194                         rx_ring->rx_stats.alloc_rx_buff_failed++;
1195                         rx_buffer->pagecnt_bias++;
1196                         break;
1197                 }
1198
1199                 ixgbevf_put_rx_buffer(rx_ring, rx_buffer, skb);
1200                 cleaned_count++;
1201
1202                 /* fetch next buffer in frame if non-eop */
1203                 if (ixgbevf_is_non_eop(rx_ring, rx_desc))
1204                         continue;
1205
1206                 /* verify the packet layout is correct */
1207                 if (ixgbevf_cleanup_headers(rx_ring, rx_desc, skb)) {
1208                         skb = NULL;
1209                         continue;
1210                 }
1211
1212                 /* probably a little skewed due to removing CRC */
1213                 total_rx_bytes += skb->len;
1214
1215                 /* Workaround hardware that can't do proper VEPA multicast
1216                  * source pruning.
1217                  */
1218                 if ((skb->pkt_type == PACKET_BROADCAST ||
1219                      skb->pkt_type == PACKET_MULTICAST) &&
1220                     ether_addr_equal(rx_ring->netdev->dev_addr,
1221                                      eth_hdr(skb)->h_source)) {
1222                         dev_kfree_skb_irq(skb);
1223                         continue;
1224                 }
1225
1226                 /* populate checksum, VLAN, and protocol */
1227                 ixgbevf_process_skb_fields(rx_ring, rx_desc, skb);
1228
1229                 ixgbevf_rx_skb(q_vector, skb);
1230
1231                 /* reset skb pointer */
1232                 skb = NULL;
1233
1234                 /* update budget accounting */
1235                 total_rx_packets++;
1236         }
1237
1238         /* place incomplete frames back on ring for completion */
1239         rx_ring->skb = skb;
1240
1241         if (xdp_xmit) {
1242                 struct ixgbevf_ring *xdp_ring =
1243                         adapter->xdp_ring[rx_ring->queue_index];
1244
1245                 /* Force memory writes to complete before letting h/w
1246                  * know there are new descriptors to fetch.
1247                  */
1248                 wmb();
1249                 ixgbevf_write_tail(xdp_ring, xdp_ring->next_to_use);
1250         }
1251
1252         u64_stats_update_begin(&rx_ring->syncp);
1253         rx_ring->stats.packets += total_rx_packets;
1254         rx_ring->stats.bytes += total_rx_bytes;
1255         u64_stats_update_end(&rx_ring->syncp);
1256         q_vector->rx.total_packets += total_rx_packets;
1257         q_vector->rx.total_bytes += total_rx_bytes;
1258
1259         return total_rx_packets;
1260 }
1261
1262 /**
1263  * ixgbevf_poll - NAPI polling calback
1264  * @napi: napi struct with our devices info in it
1265  * @budget: amount of work driver is allowed to do this pass, in packets
1266  *
1267  * This function will clean more than one or more rings associated with a
1268  * q_vector.
1269  **/
1270 static int ixgbevf_poll(struct napi_struct *napi, int budget)
1271 {
1272         struct ixgbevf_q_vector *q_vector =
1273                 container_of(napi, struct ixgbevf_q_vector, napi);
1274         struct ixgbevf_adapter *adapter = q_vector->adapter;
1275         struct ixgbevf_ring *ring;
1276         int per_ring_budget, work_done = 0;
1277         bool clean_complete = true;
1278
1279         ixgbevf_for_each_ring(ring, q_vector->tx) {
1280                 if (!ixgbevf_clean_tx_irq(q_vector, ring, budget))
1281                         clean_complete = false;
1282         }
1283
1284         if (budget <= 0)
1285                 return budget;
1286
1287         /* attempt to distribute budget to each queue fairly, but don't allow
1288          * the budget to go below 1 because we'll exit polling
1289          */
1290         if (q_vector->rx.count > 1)
1291                 per_ring_budget = max(budget/q_vector->rx.count, 1);
1292         else
1293                 per_ring_budget = budget;
1294
1295         ixgbevf_for_each_ring(ring, q_vector->rx) {
1296                 int cleaned = ixgbevf_clean_rx_irq(q_vector, ring,
1297                                                    per_ring_budget);
1298                 work_done += cleaned;
1299                 if (cleaned >= per_ring_budget)
1300                         clean_complete = false;
1301         }
1302
1303         /* If all work not completed, return budget and keep polling */
1304         if (!clean_complete)
1305                 return budget;
1306
1307         /* Exit the polling mode, but don't re-enable interrupts if stack might
1308          * poll us due to busy-polling
1309          */
1310         if (likely(napi_complete_done(napi, work_done))) {
1311                 if (adapter->rx_itr_setting == 1)
1312                         ixgbevf_set_itr(q_vector);
1313                 if (!test_bit(__IXGBEVF_DOWN, &adapter->state) &&
1314                     !test_bit(__IXGBEVF_REMOVING, &adapter->state))
1315                         ixgbevf_irq_enable_queues(adapter,
1316                                                   BIT(q_vector->v_idx));
1317         }
1318
1319         return min(work_done, budget - 1);
1320 }
1321
1322 /**
1323  * ixgbevf_write_eitr - write VTEITR register in hardware specific way
1324  * @q_vector: structure containing interrupt and ring information
1325  **/
1326 void ixgbevf_write_eitr(struct ixgbevf_q_vector *q_vector)
1327 {
1328         struct ixgbevf_adapter *adapter = q_vector->adapter;
1329         struct ixgbe_hw *hw = &adapter->hw;
1330         int v_idx = q_vector->v_idx;
1331         u32 itr_reg = q_vector->itr & IXGBE_MAX_EITR;
1332
1333         /* set the WDIS bit to not clear the timer bits and cause an
1334          * immediate assertion of the interrupt
1335          */
1336         itr_reg |= IXGBE_EITR_CNT_WDIS;
1337
1338         IXGBE_WRITE_REG(hw, IXGBE_VTEITR(v_idx), itr_reg);
1339 }
1340
1341 /**
1342  * ixgbevf_configure_msix - Configure MSI-X hardware
1343  * @adapter: board private structure
1344  *
1345  * ixgbevf_configure_msix sets up the hardware to properly generate MSI-X
1346  * interrupts.
1347  **/
1348 static void ixgbevf_configure_msix(struct ixgbevf_adapter *adapter)
1349 {
1350         struct ixgbevf_q_vector *q_vector;
1351         int q_vectors, v_idx;
1352
1353         q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1354         adapter->eims_enable_mask = 0;
1355
1356         /* Populate the IVAR table and set the ITR values to the
1357          * corresponding register.
1358          */
1359         for (v_idx = 0; v_idx < q_vectors; v_idx++) {
1360                 struct ixgbevf_ring *ring;
1361
1362                 q_vector = adapter->q_vector[v_idx];
1363
1364                 ixgbevf_for_each_ring(ring, q_vector->rx)
1365                         ixgbevf_set_ivar(adapter, 0, ring->reg_idx, v_idx);
1366
1367                 ixgbevf_for_each_ring(ring, q_vector->tx)
1368                         ixgbevf_set_ivar(adapter, 1, ring->reg_idx, v_idx);
1369
1370                 if (q_vector->tx.ring && !q_vector->rx.ring) {
1371                         /* Tx only vector */
1372                         if (adapter->tx_itr_setting == 1)
1373                                 q_vector->itr = IXGBE_12K_ITR;
1374                         else
1375                                 q_vector->itr = adapter->tx_itr_setting;
1376                 } else {
1377                         /* Rx or Rx/Tx vector */
1378                         if (adapter->rx_itr_setting == 1)
1379                                 q_vector->itr = IXGBE_20K_ITR;
1380                         else
1381                                 q_vector->itr = adapter->rx_itr_setting;
1382                 }
1383
1384                 /* add q_vector eims value to global eims_enable_mask */
1385                 adapter->eims_enable_mask |= BIT(v_idx);
1386
1387                 ixgbevf_write_eitr(q_vector);
1388         }
1389
1390         ixgbevf_set_ivar(adapter, -1, 1, v_idx);
1391         /* setup eims_other and add value to global eims_enable_mask */
1392         adapter->eims_other = BIT(v_idx);
1393         adapter->eims_enable_mask |= adapter->eims_other;
1394 }
1395
1396 enum latency_range {
1397         lowest_latency = 0,
1398         low_latency = 1,
1399         bulk_latency = 2,
1400         latency_invalid = 255
1401 };
1402
1403 /**
1404  * ixgbevf_update_itr - update the dynamic ITR value based on statistics
1405  * @q_vector: structure containing interrupt and ring information
1406  * @ring_container: structure containing ring performance data
1407  *
1408  * Stores a new ITR value based on packets and byte
1409  * counts during the last interrupt.  The advantage of per interrupt
1410  * computation is faster updates and more accurate ITR for the current
1411  * traffic pattern.  Constants in this function were computed
1412  * based on theoretical maximum wire speed and thresholds were set based
1413  * on testing data as well as attempting to minimize response time
1414  * while increasing bulk throughput.
1415  **/
1416 static void ixgbevf_update_itr(struct ixgbevf_q_vector *q_vector,
1417                                struct ixgbevf_ring_container *ring_container)
1418 {
1419         int bytes = ring_container->total_bytes;
1420         int packets = ring_container->total_packets;
1421         u32 timepassed_us;
1422         u64 bytes_perint;
1423         u8 itr_setting = ring_container->itr;
1424
1425         if (packets == 0)
1426                 return;
1427
1428         /* simple throttle rate management
1429          *    0-20MB/s lowest (100000 ints/s)
1430          *   20-100MB/s low   (20000 ints/s)
1431          *  100-1249MB/s bulk (12000 ints/s)
1432          */
1433         /* what was last interrupt timeslice? */
1434         timepassed_us = q_vector->itr >> 2;
1435         if (timepassed_us == 0)
1436                 return;
1437
1438         bytes_perint = bytes / timepassed_us; /* bytes/usec */
1439
1440         switch (itr_setting) {
1441         case lowest_latency:
1442                 if (bytes_perint > 10)
1443                         itr_setting = low_latency;
1444                 break;
1445         case low_latency:
1446                 if (bytes_perint > 20)
1447                         itr_setting = bulk_latency;
1448                 else if (bytes_perint <= 10)
1449                         itr_setting = lowest_latency;
1450                 break;
1451         case bulk_latency:
1452                 if (bytes_perint <= 20)
1453                         itr_setting = low_latency;
1454                 break;
1455         }
1456
1457         /* clear work counters since we have the values we need */
1458         ring_container->total_bytes = 0;
1459         ring_container->total_packets = 0;
1460
1461         /* write updated itr to ring container */
1462         ring_container->itr = itr_setting;
1463 }
1464
1465 static void ixgbevf_set_itr(struct ixgbevf_q_vector *q_vector)
1466 {
1467         u32 new_itr = q_vector->itr;
1468         u8 current_itr;
1469
1470         ixgbevf_update_itr(q_vector, &q_vector->tx);
1471         ixgbevf_update_itr(q_vector, &q_vector->rx);
1472
1473         current_itr = max(q_vector->rx.itr, q_vector->tx.itr);
1474
1475         switch (current_itr) {
1476         /* counts and packets in update_itr are dependent on these numbers */
1477         case lowest_latency:
1478                 new_itr = IXGBE_100K_ITR;
1479                 break;
1480         case low_latency:
1481                 new_itr = IXGBE_20K_ITR;
1482                 break;
1483         case bulk_latency:
1484                 new_itr = IXGBE_12K_ITR;
1485                 break;
1486         default:
1487                 break;
1488         }
1489
1490         if (new_itr != q_vector->itr) {
1491                 /* do an exponential smoothing */
1492                 new_itr = (10 * new_itr * q_vector->itr) /
1493                           ((9 * new_itr) + q_vector->itr);
1494
1495                 /* save the algorithm value here */
1496                 q_vector->itr = new_itr;
1497
1498                 ixgbevf_write_eitr(q_vector);
1499         }
1500 }
1501
1502 static irqreturn_t ixgbevf_msix_other(int irq, void *data)
1503 {
1504         struct ixgbevf_adapter *adapter = data;
1505         struct ixgbe_hw *hw = &adapter->hw;
1506
1507         hw->mac.get_link_status = 1;
1508
1509         ixgbevf_service_event_schedule(adapter);
1510
1511         IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, adapter->eims_other);
1512
1513         return IRQ_HANDLED;
1514 }
1515
1516 /**
1517  * ixgbevf_msix_clean_rings - single unshared vector rx clean (all queues)
1518  * @irq: unused
1519  * @data: pointer to our q_vector struct for this interrupt vector
1520  **/
1521 static irqreturn_t ixgbevf_msix_clean_rings(int irq, void *data)
1522 {
1523         struct ixgbevf_q_vector *q_vector = data;
1524
1525         /* EIAM disabled interrupts (on this vector) for us */
1526         if (q_vector->rx.ring || q_vector->tx.ring)
1527                 napi_schedule_irqoff(&q_vector->napi);
1528
1529         return IRQ_HANDLED;
1530 }
1531
1532 /**
1533  * ixgbevf_request_msix_irqs - Initialize MSI-X interrupts
1534  * @adapter: board private structure
1535  *
1536  * ixgbevf_request_msix_irqs allocates MSI-X vectors and requests
1537  * interrupts from the kernel.
1538  **/
1539 static int ixgbevf_request_msix_irqs(struct ixgbevf_adapter *adapter)
1540 {
1541         struct net_device *netdev = adapter->netdev;
1542         int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1543         unsigned int ri = 0, ti = 0;
1544         int vector, err;
1545
1546         for (vector = 0; vector < q_vectors; vector++) {
1547                 struct ixgbevf_q_vector *q_vector = adapter->q_vector[vector];
1548                 struct msix_entry *entry = &adapter->msix_entries[vector];
1549
1550                 if (q_vector->tx.ring && q_vector->rx.ring) {
1551                         snprintf(q_vector->name, sizeof(q_vector->name),
1552                                  "%s-TxRx-%u", netdev->name, ri++);
1553                         ti++;
1554                 } else if (q_vector->rx.ring) {
1555                         snprintf(q_vector->name, sizeof(q_vector->name),
1556                                  "%s-rx-%u", netdev->name, ri++);
1557                 } else if (q_vector->tx.ring) {
1558                         snprintf(q_vector->name, sizeof(q_vector->name),
1559                                  "%s-tx-%u", netdev->name, ti++);
1560                 } else {
1561                         /* skip this unused q_vector */
1562                         continue;
1563                 }
1564                 err = request_irq(entry->vector, &ixgbevf_msix_clean_rings, 0,
1565                                   q_vector->name, q_vector);
1566                 if (err) {
1567                         hw_dbg(&adapter->hw,
1568                                "request_irq failed for MSIX interrupt Error: %d\n",
1569                                err);
1570                         goto free_queue_irqs;
1571                 }
1572         }
1573
1574         err = request_irq(adapter->msix_entries[vector].vector,
1575                           &ixgbevf_msix_other, 0, netdev->name, adapter);
1576         if (err) {
1577                 hw_dbg(&adapter->hw, "request_irq for msix_other failed: %d\n",
1578                        err);
1579                 goto free_queue_irqs;
1580         }
1581
1582         return 0;
1583
1584 free_queue_irqs:
1585         while (vector) {
1586                 vector--;
1587                 free_irq(adapter->msix_entries[vector].vector,
1588                          adapter->q_vector[vector]);
1589         }
1590         /* This failure is non-recoverable - it indicates the system is
1591          * out of MSIX vector resources and the VF driver cannot run
1592          * without them.  Set the number of msix vectors to zero
1593          * indicating that not enough can be allocated.  The error
1594          * will be returned to the user indicating device open failed.
1595          * Any further attempts to force the driver to open will also
1596          * fail.  The only way to recover is to unload the driver and
1597          * reload it again.  If the system has recovered some MSIX
1598          * vectors then it may succeed.
1599          */
1600         adapter->num_msix_vectors = 0;
1601         return err;
1602 }
1603
1604 /**
1605  * ixgbevf_request_irq - initialize interrupts
1606  * @adapter: board private structure
1607  *
1608  * Attempts to configure interrupts using the best available
1609  * capabilities of the hardware and kernel.
1610  **/
1611 static int ixgbevf_request_irq(struct ixgbevf_adapter *adapter)
1612 {
1613         int err = ixgbevf_request_msix_irqs(adapter);
1614
1615         if (err)
1616                 hw_dbg(&adapter->hw, "request_irq failed, Error %d\n", err);
1617
1618         return err;
1619 }
1620
1621 static void ixgbevf_free_irq(struct ixgbevf_adapter *adapter)
1622 {
1623         int i, q_vectors;
1624
1625         if (!adapter->msix_entries)
1626                 return;
1627
1628         q_vectors = adapter->num_msix_vectors;
1629         i = q_vectors - 1;
1630
1631         free_irq(adapter->msix_entries[i].vector, adapter);
1632         i--;
1633
1634         for (; i >= 0; i--) {
1635                 /* free only the irqs that were actually requested */
1636                 if (!adapter->q_vector[i]->rx.ring &&
1637                     !adapter->q_vector[i]->tx.ring)
1638                         continue;
1639
1640                 free_irq(adapter->msix_entries[i].vector,
1641                          adapter->q_vector[i]);
1642         }
1643 }
1644
1645 /**
1646  * ixgbevf_irq_disable - Mask off interrupt generation on the NIC
1647  * @adapter: board private structure
1648  **/
1649 static inline void ixgbevf_irq_disable(struct ixgbevf_adapter *adapter)
1650 {
1651         struct ixgbe_hw *hw = &adapter->hw;
1652         int i;
1653
1654         IXGBE_WRITE_REG(hw, IXGBE_VTEIAM, 0);
1655         IXGBE_WRITE_REG(hw, IXGBE_VTEIMC, ~0);
1656         IXGBE_WRITE_REG(hw, IXGBE_VTEIAC, 0);
1657
1658         IXGBE_WRITE_FLUSH(hw);
1659
1660         for (i = 0; i < adapter->num_msix_vectors; i++)
1661                 synchronize_irq(adapter->msix_entries[i].vector);
1662 }
1663
1664 /**
1665  * ixgbevf_irq_enable - Enable default interrupt generation settings
1666  * @adapter: board private structure
1667  **/
1668 static inline void ixgbevf_irq_enable(struct ixgbevf_adapter *adapter)
1669 {
1670         struct ixgbe_hw *hw = &adapter->hw;
1671
1672         IXGBE_WRITE_REG(hw, IXGBE_VTEIAM, adapter->eims_enable_mask);
1673         IXGBE_WRITE_REG(hw, IXGBE_VTEIAC, adapter->eims_enable_mask);
1674         IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, adapter->eims_enable_mask);
1675 }
1676
1677 /**
1678  * ixgbevf_configure_tx_ring - Configure 82599 VF Tx ring after Reset
1679  * @adapter: board private structure
1680  * @ring: structure containing ring specific data
1681  *
1682  * Configure the Tx descriptor ring after a reset.
1683  **/
1684 static void ixgbevf_configure_tx_ring(struct ixgbevf_adapter *adapter,
1685                                       struct ixgbevf_ring *ring)
1686 {
1687         struct ixgbe_hw *hw = &adapter->hw;
1688         u64 tdba = ring->dma;
1689         int wait_loop = 10;
1690         u32 txdctl = IXGBE_TXDCTL_ENABLE;
1691         u8 reg_idx = ring->reg_idx;
1692
1693         /* disable queue to avoid issues while updating state */
1694         IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(reg_idx), IXGBE_TXDCTL_SWFLSH);
1695         IXGBE_WRITE_FLUSH(hw);
1696
1697         IXGBE_WRITE_REG(hw, IXGBE_VFTDBAL(reg_idx), tdba & DMA_BIT_MASK(32));
1698         IXGBE_WRITE_REG(hw, IXGBE_VFTDBAH(reg_idx), tdba >> 32);
1699         IXGBE_WRITE_REG(hw, IXGBE_VFTDLEN(reg_idx),
1700                         ring->count * sizeof(union ixgbe_adv_tx_desc));
1701
1702         /* disable head writeback */
1703         IXGBE_WRITE_REG(hw, IXGBE_VFTDWBAH(reg_idx), 0);
1704         IXGBE_WRITE_REG(hw, IXGBE_VFTDWBAL(reg_idx), 0);
1705
1706         /* enable relaxed ordering */
1707         IXGBE_WRITE_REG(hw, IXGBE_VFDCA_TXCTRL(reg_idx),
1708                         (IXGBE_DCA_TXCTRL_DESC_RRO_EN |
1709                          IXGBE_DCA_TXCTRL_DATA_RRO_EN));
1710
1711         /* reset head and tail pointers */
1712         IXGBE_WRITE_REG(hw, IXGBE_VFTDH(reg_idx), 0);
1713         IXGBE_WRITE_REG(hw, IXGBE_VFTDT(reg_idx), 0);
1714         ring->tail = adapter->io_addr + IXGBE_VFTDT(reg_idx);
1715
1716         /* reset ntu and ntc to place SW in sync with hardwdare */
1717         ring->next_to_clean = 0;
1718         ring->next_to_use = 0;
1719
1720         /* In order to avoid issues WTHRESH + PTHRESH should always be equal
1721          * to or less than the number of on chip descriptors, which is
1722          * currently 40.
1723          */
1724         txdctl |= (8 << 16);    /* WTHRESH = 8 */
1725
1726         /* Setting PTHRESH to 32 both improves performance */
1727         txdctl |= (1u << 8) |    /* HTHRESH = 1 */
1728                    32;           /* PTHRESH = 32 */
1729
1730         /* reinitialize tx_buffer_info */
1731         memset(ring->tx_buffer_info, 0,
1732                sizeof(struct ixgbevf_tx_buffer) * ring->count);
1733
1734         clear_bit(__IXGBEVF_HANG_CHECK_ARMED, &ring->state);
1735         clear_bit(__IXGBEVF_TX_XDP_RING_PRIMED, &ring->state);
1736
1737         IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(reg_idx), txdctl);
1738
1739         /* poll to verify queue is enabled */
1740         do {
1741                 usleep_range(1000, 2000);
1742                 txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(reg_idx));
1743         }  while (--wait_loop && !(txdctl & IXGBE_TXDCTL_ENABLE));
1744         if (!wait_loop)
1745                 hw_dbg(hw, "Could not enable Tx Queue %d\n", reg_idx);
1746 }
1747
1748 /**
1749  * ixgbevf_configure_tx - Configure 82599 VF Transmit Unit after Reset
1750  * @adapter: board private structure
1751  *
1752  * Configure the Tx unit of the MAC after a reset.
1753  **/
1754 static void ixgbevf_configure_tx(struct ixgbevf_adapter *adapter)
1755 {
1756         u32 i;
1757
1758         /* Setup the HW Tx Head and Tail descriptor pointers */
1759         for (i = 0; i < adapter->num_tx_queues; i++)
1760                 ixgbevf_configure_tx_ring(adapter, adapter->tx_ring[i]);
1761         for (i = 0; i < adapter->num_xdp_queues; i++)
1762                 ixgbevf_configure_tx_ring(adapter, adapter->xdp_ring[i]);
1763 }
1764
1765 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
1766
1767 static void ixgbevf_configure_srrctl(struct ixgbevf_adapter *adapter,
1768                                      struct ixgbevf_ring *ring, int index)
1769 {
1770         struct ixgbe_hw *hw = &adapter->hw;
1771         u32 srrctl;
1772
1773         srrctl = IXGBE_SRRCTL_DROP_EN;
1774
1775         srrctl |= IXGBEVF_RX_HDR_SIZE << IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT;
1776         if (ring_uses_large_buffer(ring))
1777                 srrctl |= IXGBEVF_RXBUFFER_3072 >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1778         else
1779                 srrctl |= IXGBEVF_RXBUFFER_2048 >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1780         srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
1781
1782         IXGBE_WRITE_REG(hw, IXGBE_VFSRRCTL(index), srrctl);
1783 }
1784
1785 static void ixgbevf_setup_psrtype(struct ixgbevf_adapter *adapter)
1786 {
1787         struct ixgbe_hw *hw = &adapter->hw;
1788
1789         /* PSRTYPE must be initialized in 82599 */
1790         u32 psrtype = IXGBE_PSRTYPE_TCPHDR | IXGBE_PSRTYPE_UDPHDR |
1791                       IXGBE_PSRTYPE_IPV4HDR | IXGBE_PSRTYPE_IPV6HDR |
1792                       IXGBE_PSRTYPE_L2HDR;
1793
1794         if (adapter->num_rx_queues > 1)
1795                 psrtype |= BIT(29);
1796
1797         IXGBE_WRITE_REG(hw, IXGBE_VFPSRTYPE, psrtype);
1798 }
1799
1800 #define IXGBEVF_MAX_RX_DESC_POLL 10
1801 static void ixgbevf_disable_rx_queue(struct ixgbevf_adapter *adapter,
1802                                      struct ixgbevf_ring *ring)
1803 {
1804         struct ixgbe_hw *hw = &adapter->hw;
1805         int wait_loop = IXGBEVF_MAX_RX_DESC_POLL;
1806         u32 rxdctl;
1807         u8 reg_idx = ring->reg_idx;
1808
1809         if (IXGBE_REMOVED(hw->hw_addr))
1810                 return;
1811         rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));
1812         rxdctl &= ~IXGBE_RXDCTL_ENABLE;
1813
1814         /* write value back with RXDCTL.ENABLE bit cleared */
1815         IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(reg_idx), rxdctl);
1816
1817         /* the hardware may take up to 100us to really disable the Rx queue */
1818         do {
1819                 udelay(10);
1820                 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));
1821         } while (--wait_loop && (rxdctl & IXGBE_RXDCTL_ENABLE));
1822
1823         if (!wait_loop)
1824                 pr_err("RXDCTL.ENABLE queue %d not cleared while polling\n",
1825                        reg_idx);
1826 }
1827
1828 static void ixgbevf_rx_desc_queue_enable(struct ixgbevf_adapter *adapter,
1829                                          struct ixgbevf_ring *ring)
1830 {
1831         struct ixgbe_hw *hw = &adapter->hw;
1832         int wait_loop = IXGBEVF_MAX_RX_DESC_POLL;
1833         u32 rxdctl;
1834         u8 reg_idx = ring->reg_idx;
1835
1836         if (IXGBE_REMOVED(hw->hw_addr))
1837                 return;
1838         do {
1839                 usleep_range(1000, 2000);
1840                 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));
1841         } while (--wait_loop && !(rxdctl & IXGBE_RXDCTL_ENABLE));
1842
1843         if (!wait_loop)
1844                 pr_err("RXDCTL.ENABLE queue %d not set while polling\n",
1845                        reg_idx);
1846 }
1847
1848 /**
1849  * ixgbevf_init_rss_key - Initialize adapter RSS key
1850  * @adapter: device handle
1851  *
1852  * Allocates and initializes the RSS key if it is not allocated.
1853  **/
1854 static inline int ixgbevf_init_rss_key(struct ixgbevf_adapter *adapter)
1855 {
1856         u32 *rss_key;
1857
1858         if (!adapter->rss_key) {
1859                 rss_key = kzalloc(IXGBEVF_RSS_HASH_KEY_SIZE, GFP_KERNEL);
1860                 if (unlikely(!rss_key))
1861                         return -ENOMEM;
1862
1863                 netdev_rss_key_fill(rss_key, IXGBEVF_RSS_HASH_KEY_SIZE);
1864                 adapter->rss_key = rss_key;
1865         }
1866
1867         return 0;
1868 }
1869
1870 static void ixgbevf_setup_vfmrqc(struct ixgbevf_adapter *adapter)
1871 {
1872         struct ixgbe_hw *hw = &adapter->hw;
1873         u32 vfmrqc = 0, vfreta = 0;
1874         u16 rss_i = adapter->num_rx_queues;
1875         u8 i, j;
1876
1877         /* Fill out hash function seeds */
1878         for (i = 0; i < IXGBEVF_VFRSSRK_REGS; i++)
1879                 IXGBE_WRITE_REG(hw, IXGBE_VFRSSRK(i), *(adapter->rss_key + i));
1880
1881         for (i = 0, j = 0; i < IXGBEVF_X550_VFRETA_SIZE; i++, j++) {
1882                 if (j == rss_i)
1883                         j = 0;
1884
1885                 adapter->rss_indir_tbl[i] = j;
1886
1887                 vfreta |= j << (i & 0x3) * 8;
1888                 if ((i & 3) == 3) {
1889                         IXGBE_WRITE_REG(hw, IXGBE_VFRETA(i >> 2), vfreta);
1890                         vfreta = 0;
1891                 }
1892         }
1893
1894         /* Perform hash on these packet types */
1895         vfmrqc |= IXGBE_VFMRQC_RSS_FIELD_IPV4 |
1896                 IXGBE_VFMRQC_RSS_FIELD_IPV4_TCP |
1897                 IXGBE_VFMRQC_RSS_FIELD_IPV6 |
1898                 IXGBE_VFMRQC_RSS_FIELD_IPV6_TCP;
1899
1900         vfmrqc |= IXGBE_VFMRQC_RSSEN;
1901
1902         IXGBE_WRITE_REG(hw, IXGBE_VFMRQC, vfmrqc);
1903 }
1904
1905 static void ixgbevf_configure_rx_ring(struct ixgbevf_adapter *adapter,
1906                                       struct ixgbevf_ring *ring)
1907 {
1908         struct ixgbe_hw *hw = &adapter->hw;
1909         union ixgbe_adv_rx_desc *rx_desc;
1910         u64 rdba = ring->dma;
1911         u32 rxdctl;
1912         u8 reg_idx = ring->reg_idx;
1913
1914         /* disable queue to avoid issues while updating state */
1915         rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));
1916         ixgbevf_disable_rx_queue(adapter, ring);
1917
1918         IXGBE_WRITE_REG(hw, IXGBE_VFRDBAL(reg_idx), rdba & DMA_BIT_MASK(32));
1919         IXGBE_WRITE_REG(hw, IXGBE_VFRDBAH(reg_idx), rdba >> 32);
1920         IXGBE_WRITE_REG(hw, IXGBE_VFRDLEN(reg_idx),
1921                         ring->count * sizeof(union ixgbe_adv_rx_desc));
1922
1923 #ifndef CONFIG_SPARC
1924         /* enable relaxed ordering */
1925         IXGBE_WRITE_REG(hw, IXGBE_VFDCA_RXCTRL(reg_idx),
1926                         IXGBE_DCA_RXCTRL_DESC_RRO_EN);
1927 #else
1928         IXGBE_WRITE_REG(hw, IXGBE_VFDCA_RXCTRL(reg_idx),
1929                         IXGBE_DCA_RXCTRL_DESC_RRO_EN |
1930                         IXGBE_DCA_RXCTRL_DATA_WRO_EN);
1931 #endif
1932
1933         /* reset head and tail pointers */
1934         IXGBE_WRITE_REG(hw, IXGBE_VFRDH(reg_idx), 0);
1935         IXGBE_WRITE_REG(hw, IXGBE_VFRDT(reg_idx), 0);
1936         ring->tail = adapter->io_addr + IXGBE_VFRDT(reg_idx);
1937
1938         /* initialize rx_buffer_info */
1939         memset(ring->rx_buffer_info, 0,
1940                sizeof(struct ixgbevf_rx_buffer) * ring->count);
1941
1942         /* initialize Rx descriptor 0 */
1943         rx_desc = IXGBEVF_RX_DESC(ring, 0);
1944         rx_desc->wb.upper.length = 0;
1945
1946         /* reset ntu and ntc to place SW in sync with hardwdare */
1947         ring->next_to_clean = 0;
1948         ring->next_to_use = 0;
1949         ring->next_to_alloc = 0;
1950
1951         ixgbevf_configure_srrctl(adapter, ring, reg_idx);
1952
1953         /* RXDCTL.RLPML does not work on 82599 */
1954         if (adapter->hw.mac.type != ixgbe_mac_82599_vf) {
1955                 rxdctl &= ~(IXGBE_RXDCTL_RLPMLMASK |
1956                             IXGBE_RXDCTL_RLPML_EN);
1957
1958 #if (PAGE_SIZE < 8192)
1959                 /* Limit the maximum frame size so we don't overrun the skb */
1960                 if (ring_uses_build_skb(ring) &&
1961                     !ring_uses_large_buffer(ring))
1962                         rxdctl |= IXGBEVF_MAX_FRAME_BUILD_SKB |
1963                                   IXGBE_RXDCTL_RLPML_EN;
1964 #endif
1965         }
1966
1967         rxdctl |= IXGBE_RXDCTL_ENABLE | IXGBE_RXDCTL_VME;
1968         IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(reg_idx), rxdctl);
1969
1970         ixgbevf_rx_desc_queue_enable(adapter, ring);
1971         ixgbevf_alloc_rx_buffers(ring, ixgbevf_desc_unused(ring));
1972 }
1973
1974 static void ixgbevf_set_rx_buffer_len(struct ixgbevf_adapter *adapter,
1975                                       struct ixgbevf_ring *rx_ring)
1976 {
1977         struct net_device *netdev = adapter->netdev;
1978         unsigned int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1979
1980         /* set build_skb and buffer size flags */
1981         clear_ring_build_skb_enabled(rx_ring);
1982         clear_ring_uses_large_buffer(rx_ring);
1983
1984         if (adapter->flags & IXGBEVF_FLAGS_LEGACY_RX)
1985                 return;
1986
1987         set_ring_build_skb_enabled(rx_ring);
1988
1989         if (PAGE_SIZE < 8192) {
1990                 if (max_frame <= IXGBEVF_MAX_FRAME_BUILD_SKB)
1991                         return;
1992
1993                 set_ring_uses_large_buffer(rx_ring);
1994         }
1995 }
1996
1997 /**
1998  * ixgbevf_configure_rx - Configure 82599 VF Receive Unit after Reset
1999  * @adapter: board private structure
2000  *
2001  * Configure the Rx unit of the MAC after a reset.
2002  **/
2003 static void ixgbevf_configure_rx(struct ixgbevf_adapter *adapter)
2004 {
2005         struct ixgbe_hw *hw = &adapter->hw;
2006         struct net_device *netdev = adapter->netdev;
2007         int i, ret;
2008
2009         ixgbevf_setup_psrtype(adapter);
2010         if (hw->mac.type >= ixgbe_mac_X550_vf)
2011                 ixgbevf_setup_vfmrqc(adapter);
2012
2013         spin_lock_bh(&adapter->mbx_lock);
2014         /* notify the PF of our intent to use this size of frame */
2015         ret = hw->mac.ops.set_rlpml(hw, netdev->mtu + ETH_HLEN + ETH_FCS_LEN);
2016         spin_unlock_bh(&adapter->mbx_lock);
2017         if (ret)
2018                 dev_err(&adapter->pdev->dev,
2019                         "Failed to set MTU at %d\n", netdev->mtu);
2020
2021         /* Setup the HW Rx Head and Tail Descriptor Pointers and
2022          * the Base and Length of the Rx Descriptor Ring
2023          */
2024         for (i = 0; i < adapter->num_rx_queues; i++) {
2025                 struct ixgbevf_ring *rx_ring = adapter->rx_ring[i];
2026
2027                 ixgbevf_set_rx_buffer_len(adapter, rx_ring);
2028                 ixgbevf_configure_rx_ring(adapter, rx_ring);
2029         }
2030 }
2031
2032 static int ixgbevf_vlan_rx_add_vid(struct net_device *netdev,
2033                                    __be16 proto, u16 vid)
2034 {
2035         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2036         struct ixgbe_hw *hw = &adapter->hw;
2037         int err;
2038
2039         spin_lock_bh(&adapter->mbx_lock);
2040
2041         /* add VID to filter table */
2042         err = hw->mac.ops.set_vfta(hw, vid, 0, true);
2043
2044         spin_unlock_bh(&adapter->mbx_lock);
2045
2046         /* translate error return types so error makes sense */
2047         if (err == IXGBE_ERR_MBX)
2048                 return -EIO;
2049
2050         if (err == IXGBE_ERR_INVALID_ARGUMENT)
2051                 return -EACCES;
2052
2053         set_bit(vid, adapter->active_vlans);
2054
2055         return err;
2056 }
2057
2058 static int ixgbevf_vlan_rx_kill_vid(struct net_device *netdev,
2059                                     __be16 proto, u16 vid)
2060 {
2061         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2062         struct ixgbe_hw *hw = &adapter->hw;
2063         int err;
2064
2065         spin_lock_bh(&adapter->mbx_lock);
2066
2067         /* remove VID from filter table */
2068         err = hw->mac.ops.set_vfta(hw, vid, 0, false);
2069
2070         spin_unlock_bh(&adapter->mbx_lock);
2071
2072         clear_bit(vid, adapter->active_vlans);
2073
2074         return err;
2075 }
2076
2077 static void ixgbevf_restore_vlan(struct ixgbevf_adapter *adapter)
2078 {
2079         u16 vid;
2080
2081         for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
2082                 ixgbevf_vlan_rx_add_vid(adapter->netdev,
2083                                         htons(ETH_P_8021Q), vid);
2084 }
2085
2086 static int ixgbevf_write_uc_addr_list(struct net_device *netdev)
2087 {
2088         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2089         struct ixgbe_hw *hw = &adapter->hw;
2090         int count = 0;
2091
2092         if (!netdev_uc_empty(netdev)) {
2093                 struct netdev_hw_addr *ha;
2094
2095                 netdev_for_each_uc_addr(ha, netdev) {
2096                         hw->mac.ops.set_uc_addr(hw, ++count, ha->addr);
2097                         udelay(200);
2098                 }
2099         } else {
2100                 /* If the list is empty then send message to PF driver to
2101                  * clear all MAC VLANs on this VF.
2102                  */
2103                 hw->mac.ops.set_uc_addr(hw, 0, NULL);
2104         }
2105
2106         return count;
2107 }
2108
2109 /**
2110  * ixgbevf_set_rx_mode - Multicast and unicast set
2111  * @netdev: network interface device structure
2112  *
2113  * The set_rx_method entry point is called whenever the multicast address
2114  * list, unicast address list or the network interface flags are updated.
2115  * This routine is responsible for configuring the hardware for proper
2116  * multicast mode and configuring requested unicast filters.
2117  **/
2118 static void ixgbevf_set_rx_mode(struct net_device *netdev)
2119 {
2120         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2121         struct ixgbe_hw *hw = &adapter->hw;
2122         unsigned int flags = netdev->flags;
2123         int xcast_mode;
2124
2125         /* request the most inclusive mode we need */
2126         if (flags & IFF_PROMISC)
2127                 xcast_mode = IXGBEVF_XCAST_MODE_PROMISC;
2128         else if (flags & IFF_ALLMULTI)
2129                 xcast_mode = IXGBEVF_XCAST_MODE_ALLMULTI;
2130         else if (flags & (IFF_BROADCAST | IFF_MULTICAST))
2131                 xcast_mode = IXGBEVF_XCAST_MODE_MULTI;
2132         else
2133                 xcast_mode = IXGBEVF_XCAST_MODE_NONE;
2134
2135         spin_lock_bh(&adapter->mbx_lock);
2136
2137         hw->mac.ops.update_xcast_mode(hw, xcast_mode);
2138
2139         /* reprogram multicast list */
2140         hw->mac.ops.update_mc_addr_list(hw, netdev);
2141
2142         ixgbevf_write_uc_addr_list(netdev);
2143
2144         spin_unlock_bh(&adapter->mbx_lock);
2145 }
2146
2147 static void ixgbevf_napi_enable_all(struct ixgbevf_adapter *adapter)
2148 {
2149         int q_idx;
2150         struct ixgbevf_q_vector *q_vector;
2151         int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2152
2153         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
2154                 q_vector = adapter->q_vector[q_idx];
2155                 napi_enable(&q_vector->napi);
2156         }
2157 }
2158
2159 static void ixgbevf_napi_disable_all(struct ixgbevf_adapter *adapter)
2160 {
2161         int q_idx;
2162         struct ixgbevf_q_vector *q_vector;
2163         int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2164
2165         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
2166                 q_vector = adapter->q_vector[q_idx];
2167                 napi_disable(&q_vector->napi);
2168         }
2169 }
2170
2171 static int ixgbevf_configure_dcb(struct ixgbevf_adapter *adapter)
2172 {
2173         struct ixgbe_hw *hw = &adapter->hw;
2174         unsigned int def_q = 0;
2175         unsigned int num_tcs = 0;
2176         unsigned int num_rx_queues = adapter->num_rx_queues;
2177         unsigned int num_tx_queues = adapter->num_tx_queues;
2178         int err;
2179
2180         spin_lock_bh(&adapter->mbx_lock);
2181
2182         /* fetch queue configuration from the PF */
2183         err = ixgbevf_get_queues(hw, &num_tcs, &def_q);
2184
2185         spin_unlock_bh(&adapter->mbx_lock);
2186
2187         if (err)
2188                 return err;
2189
2190         if (num_tcs > 1) {
2191                 /* we need only one Tx queue */
2192                 num_tx_queues = 1;
2193
2194                 /* update default Tx ring register index */
2195                 adapter->tx_ring[0]->reg_idx = def_q;
2196
2197                 /* we need as many queues as traffic classes */
2198                 num_rx_queues = num_tcs;
2199         }
2200
2201         /* if we have a bad config abort request queue reset */
2202         if ((adapter->num_rx_queues != num_rx_queues) ||
2203             (adapter->num_tx_queues != num_tx_queues)) {
2204                 /* force mailbox timeout to prevent further messages */
2205                 hw->mbx.timeout = 0;
2206
2207                 /* wait for watchdog to come around and bail us out */
2208                 set_bit(__IXGBEVF_QUEUE_RESET_REQUESTED, &adapter->state);
2209         }
2210
2211         return 0;
2212 }
2213
2214 static void ixgbevf_configure(struct ixgbevf_adapter *adapter)
2215 {
2216         ixgbevf_configure_dcb(adapter);
2217
2218         ixgbevf_set_rx_mode(adapter->netdev);
2219
2220         ixgbevf_restore_vlan(adapter);
2221         ixgbevf_ipsec_restore(adapter);
2222
2223         ixgbevf_configure_tx(adapter);
2224         ixgbevf_configure_rx(adapter);
2225 }
2226
2227 static void ixgbevf_save_reset_stats(struct ixgbevf_adapter *adapter)
2228 {
2229         /* Only save pre-reset stats if there are some */
2230         if (adapter->stats.vfgprc || adapter->stats.vfgptc) {
2231                 adapter->stats.saved_reset_vfgprc += adapter->stats.vfgprc -
2232                         adapter->stats.base_vfgprc;
2233                 adapter->stats.saved_reset_vfgptc += adapter->stats.vfgptc -
2234                         adapter->stats.base_vfgptc;
2235                 adapter->stats.saved_reset_vfgorc += adapter->stats.vfgorc -
2236                         adapter->stats.base_vfgorc;
2237                 adapter->stats.saved_reset_vfgotc += adapter->stats.vfgotc -
2238                         adapter->stats.base_vfgotc;
2239                 adapter->stats.saved_reset_vfmprc += adapter->stats.vfmprc -
2240                         adapter->stats.base_vfmprc;
2241         }
2242 }
2243
2244 static void ixgbevf_init_last_counter_stats(struct ixgbevf_adapter *adapter)
2245 {
2246         struct ixgbe_hw *hw = &adapter->hw;
2247
2248         adapter->stats.last_vfgprc = IXGBE_READ_REG(hw, IXGBE_VFGPRC);
2249         adapter->stats.last_vfgorc = IXGBE_READ_REG(hw, IXGBE_VFGORC_LSB);
2250         adapter->stats.last_vfgorc |=
2251                 (((u64)(IXGBE_READ_REG(hw, IXGBE_VFGORC_MSB))) << 32);
2252         adapter->stats.last_vfgptc = IXGBE_READ_REG(hw, IXGBE_VFGPTC);
2253         adapter->stats.last_vfgotc = IXGBE_READ_REG(hw, IXGBE_VFGOTC_LSB);
2254         adapter->stats.last_vfgotc |=
2255                 (((u64)(IXGBE_READ_REG(hw, IXGBE_VFGOTC_MSB))) << 32);
2256         adapter->stats.last_vfmprc = IXGBE_READ_REG(hw, IXGBE_VFMPRC);
2257
2258         adapter->stats.base_vfgprc = adapter->stats.last_vfgprc;
2259         adapter->stats.base_vfgorc = adapter->stats.last_vfgorc;
2260         adapter->stats.base_vfgptc = adapter->stats.last_vfgptc;
2261         adapter->stats.base_vfgotc = adapter->stats.last_vfgotc;
2262         adapter->stats.base_vfmprc = adapter->stats.last_vfmprc;
2263 }
2264
2265 static void ixgbevf_negotiate_api(struct ixgbevf_adapter *adapter)
2266 {
2267         struct ixgbe_hw *hw = &adapter->hw;
2268         static const int api[] = {
2269                 ixgbe_mbox_api_14,
2270                 ixgbe_mbox_api_13,
2271                 ixgbe_mbox_api_12,
2272                 ixgbe_mbox_api_11,
2273                 ixgbe_mbox_api_10,
2274                 ixgbe_mbox_api_unknown
2275         };
2276         int err, idx = 0;
2277
2278         spin_lock_bh(&adapter->mbx_lock);
2279
2280         while (api[idx] != ixgbe_mbox_api_unknown) {
2281                 err = hw->mac.ops.negotiate_api_version(hw, api[idx]);
2282                 if (!err)
2283                         break;
2284                 idx++;
2285         }
2286
2287         spin_unlock_bh(&adapter->mbx_lock);
2288 }
2289
2290 static void ixgbevf_up_complete(struct ixgbevf_adapter *adapter)
2291 {
2292         struct net_device *netdev = adapter->netdev;
2293         struct ixgbe_hw *hw = &adapter->hw;
2294
2295         ixgbevf_configure_msix(adapter);
2296
2297         spin_lock_bh(&adapter->mbx_lock);
2298
2299         if (is_valid_ether_addr(hw->mac.addr))
2300                 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0);
2301         else
2302                 hw->mac.ops.set_rar(hw, 0, hw->mac.perm_addr, 0);
2303
2304         spin_unlock_bh(&adapter->mbx_lock);
2305
2306         smp_mb__before_atomic();
2307         clear_bit(__IXGBEVF_DOWN, &adapter->state);
2308         ixgbevf_napi_enable_all(adapter);
2309
2310         /* clear any pending interrupts, may auto mask */
2311         IXGBE_READ_REG(hw, IXGBE_VTEICR);
2312         ixgbevf_irq_enable(adapter);
2313
2314         /* enable transmits */
2315         netif_tx_start_all_queues(netdev);
2316
2317         ixgbevf_save_reset_stats(adapter);
2318         ixgbevf_init_last_counter_stats(adapter);
2319
2320         hw->mac.get_link_status = 1;
2321         mod_timer(&adapter->service_timer, jiffies);
2322 }
2323
2324 void ixgbevf_up(struct ixgbevf_adapter *adapter)
2325 {
2326         ixgbevf_configure(adapter);
2327
2328         ixgbevf_up_complete(adapter);
2329 }
2330
2331 /**
2332  * ixgbevf_clean_rx_ring - Free Rx Buffers per Queue
2333  * @rx_ring: ring to free buffers from
2334  **/
2335 static void ixgbevf_clean_rx_ring(struct ixgbevf_ring *rx_ring)
2336 {
2337         u16 i = rx_ring->next_to_clean;
2338
2339         /* Free Rx ring sk_buff */
2340         if (rx_ring->skb) {
2341                 dev_kfree_skb(rx_ring->skb);
2342                 rx_ring->skb = NULL;
2343         }
2344
2345         /* Free all the Rx ring pages */
2346         while (i != rx_ring->next_to_alloc) {
2347                 struct ixgbevf_rx_buffer *rx_buffer;
2348
2349                 rx_buffer = &rx_ring->rx_buffer_info[i];
2350
2351                 /* Invalidate cache lines that may have been written to by
2352                  * device so that we avoid corrupting memory.
2353                  */
2354                 dma_sync_single_range_for_cpu(rx_ring->dev,
2355                                               rx_buffer->dma,
2356                                               rx_buffer->page_offset,
2357                                               ixgbevf_rx_bufsz(rx_ring),
2358                                               DMA_FROM_DEVICE);
2359
2360                 /* free resources associated with mapping */
2361                 dma_unmap_page_attrs(rx_ring->dev,
2362                                      rx_buffer->dma,
2363                                      ixgbevf_rx_pg_size(rx_ring),
2364                                      DMA_FROM_DEVICE,
2365                                      IXGBEVF_RX_DMA_ATTR);
2366
2367                 __page_frag_cache_drain(rx_buffer->page,
2368                                         rx_buffer->pagecnt_bias);
2369
2370                 i++;
2371                 if (i == rx_ring->count)
2372                         i = 0;
2373         }
2374
2375         rx_ring->next_to_alloc = 0;
2376         rx_ring->next_to_clean = 0;
2377         rx_ring->next_to_use = 0;
2378 }
2379
2380 /**
2381  * ixgbevf_clean_tx_ring - Free Tx Buffers
2382  * @tx_ring: ring to be cleaned
2383  **/
2384 static void ixgbevf_clean_tx_ring(struct ixgbevf_ring *tx_ring)
2385 {
2386         u16 i = tx_ring->next_to_clean;
2387         struct ixgbevf_tx_buffer *tx_buffer = &tx_ring->tx_buffer_info[i];
2388
2389         while (i != tx_ring->next_to_use) {
2390                 union ixgbe_adv_tx_desc *eop_desc, *tx_desc;
2391
2392                 /* Free all the Tx ring sk_buffs */
2393                 if (ring_is_xdp(tx_ring))
2394                         page_frag_free(tx_buffer->data);
2395                 else
2396                         dev_kfree_skb_any(tx_buffer->skb);
2397
2398                 /* unmap skb header data */
2399                 dma_unmap_single(tx_ring->dev,
2400                                  dma_unmap_addr(tx_buffer, dma),
2401                                  dma_unmap_len(tx_buffer, len),
2402                                  DMA_TO_DEVICE);
2403
2404                 /* check for eop_desc to determine the end of the packet */
2405                 eop_desc = tx_buffer->next_to_watch;
2406                 tx_desc = IXGBEVF_TX_DESC(tx_ring, i);
2407
2408                 /* unmap remaining buffers */
2409                 while (tx_desc != eop_desc) {
2410                         tx_buffer++;
2411                         tx_desc++;
2412                         i++;
2413                         if (unlikely(i == tx_ring->count)) {
2414                                 i = 0;
2415                                 tx_buffer = tx_ring->tx_buffer_info;
2416                                 tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);
2417                         }
2418
2419                         /* unmap any remaining paged data */
2420                         if (dma_unmap_len(tx_buffer, len))
2421                                 dma_unmap_page(tx_ring->dev,
2422                                                dma_unmap_addr(tx_buffer, dma),
2423                                                dma_unmap_len(tx_buffer, len),
2424                                                DMA_TO_DEVICE);
2425                 }
2426
2427                 /* move us one more past the eop_desc for start of next pkt */
2428                 tx_buffer++;
2429                 i++;
2430                 if (unlikely(i == tx_ring->count)) {
2431                         i = 0;
2432                         tx_buffer = tx_ring->tx_buffer_info;
2433                 }
2434         }
2435
2436         /* reset next_to_use and next_to_clean */
2437         tx_ring->next_to_use = 0;
2438         tx_ring->next_to_clean = 0;
2439
2440 }
2441
2442 /**
2443  * ixgbevf_clean_all_rx_rings - Free Rx Buffers for all queues
2444  * @adapter: board private structure
2445  **/
2446 static void ixgbevf_clean_all_rx_rings(struct ixgbevf_adapter *adapter)
2447 {
2448         int i;
2449
2450         for (i = 0; i < adapter->num_rx_queues; i++)
2451                 ixgbevf_clean_rx_ring(adapter->rx_ring[i]);
2452 }
2453
2454 /**
2455  * ixgbevf_clean_all_tx_rings - Free Tx Buffers for all queues
2456  * @adapter: board private structure
2457  **/
2458 static void ixgbevf_clean_all_tx_rings(struct ixgbevf_adapter *adapter)
2459 {
2460         int i;
2461
2462         for (i = 0; i < adapter->num_tx_queues; i++)
2463                 ixgbevf_clean_tx_ring(adapter->tx_ring[i]);
2464         for (i = 0; i < adapter->num_xdp_queues; i++)
2465                 ixgbevf_clean_tx_ring(adapter->xdp_ring[i]);
2466 }
2467
2468 void ixgbevf_down(struct ixgbevf_adapter *adapter)
2469 {
2470         struct net_device *netdev = adapter->netdev;
2471         struct ixgbe_hw *hw = &adapter->hw;
2472         int i;
2473
2474         /* signal that we are down to the interrupt handler */
2475         if (test_and_set_bit(__IXGBEVF_DOWN, &adapter->state))
2476                 return; /* do nothing if already down */
2477
2478         /* disable all enabled Rx queues */
2479         for (i = 0; i < adapter->num_rx_queues; i++)
2480                 ixgbevf_disable_rx_queue(adapter, adapter->rx_ring[i]);
2481
2482         usleep_range(10000, 20000);
2483
2484         netif_tx_stop_all_queues(netdev);
2485
2486         /* call carrier off first to avoid false dev_watchdog timeouts */
2487         netif_carrier_off(netdev);
2488         netif_tx_disable(netdev);
2489
2490         ixgbevf_irq_disable(adapter);
2491
2492         ixgbevf_napi_disable_all(adapter);
2493
2494         del_timer_sync(&adapter->service_timer);
2495
2496         /* disable transmits in the hardware now that interrupts are off */
2497         for (i = 0; i < adapter->num_tx_queues; i++) {
2498                 u8 reg_idx = adapter->tx_ring[i]->reg_idx;
2499
2500                 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(reg_idx),
2501                                 IXGBE_TXDCTL_SWFLSH);
2502         }
2503
2504         for (i = 0; i < adapter->num_xdp_queues; i++) {
2505                 u8 reg_idx = adapter->xdp_ring[i]->reg_idx;
2506
2507                 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(reg_idx),
2508                                 IXGBE_TXDCTL_SWFLSH);
2509         }
2510
2511         if (!pci_channel_offline(adapter->pdev))
2512                 ixgbevf_reset(adapter);
2513
2514         ixgbevf_clean_all_tx_rings(adapter);
2515         ixgbevf_clean_all_rx_rings(adapter);
2516 }
2517
2518 void ixgbevf_reinit_locked(struct ixgbevf_adapter *adapter)
2519 {
2520         while (test_and_set_bit(__IXGBEVF_RESETTING, &adapter->state))
2521                 msleep(1);
2522
2523         ixgbevf_down(adapter);
2524         pci_set_master(adapter->pdev);
2525         ixgbevf_up(adapter);
2526
2527         clear_bit(__IXGBEVF_RESETTING, &adapter->state);
2528 }
2529
2530 void ixgbevf_reset(struct ixgbevf_adapter *adapter)
2531 {
2532         struct ixgbe_hw *hw = &adapter->hw;
2533         struct net_device *netdev = adapter->netdev;
2534
2535         if (hw->mac.ops.reset_hw(hw)) {
2536                 hw_dbg(hw, "PF still resetting\n");
2537         } else {
2538                 hw->mac.ops.init_hw(hw);
2539                 ixgbevf_negotiate_api(adapter);
2540         }
2541
2542         if (is_valid_ether_addr(adapter->hw.mac.addr)) {
2543                 eth_hw_addr_set(netdev, adapter->hw.mac.addr);
2544                 ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
2545         }
2546
2547         adapter->last_reset = jiffies;
2548 }
2549
2550 static int ixgbevf_acquire_msix_vectors(struct ixgbevf_adapter *adapter,
2551                                         int vectors)
2552 {
2553         int vector_threshold;
2554
2555         /* We'll want at least 2 (vector_threshold):
2556          * 1) TxQ[0] + RxQ[0] handler
2557          * 2) Other (Link Status Change, etc.)
2558          */
2559         vector_threshold = MIN_MSIX_COUNT;
2560
2561         /* The more we get, the more we will assign to Tx/Rx Cleanup
2562          * for the separate queues...where Rx Cleanup >= Tx Cleanup.
2563          * Right now, we simply care about how many we'll get; we'll
2564          * set them up later while requesting irq's.
2565          */
2566         vectors = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
2567                                         vector_threshold, vectors);
2568
2569         if (vectors < 0) {
2570                 dev_err(&adapter->pdev->dev,
2571                         "Unable to allocate MSI-X interrupts\n");
2572                 kfree(adapter->msix_entries);
2573                 adapter->msix_entries = NULL;
2574                 return vectors;
2575         }
2576
2577         /* Adjust for only the vectors we'll use, which is minimum
2578          * of max_msix_q_vectors + NON_Q_VECTORS, or the number of
2579          * vectors we were allocated.
2580          */
2581         adapter->num_msix_vectors = vectors;
2582
2583         return 0;
2584 }
2585
2586 /**
2587  * ixgbevf_set_num_queues - Allocate queues for device, feature dependent
2588  * @adapter: board private structure to initialize
2589  *
2590  * This is the top level queue allocation routine.  The order here is very
2591  * important, starting with the "most" number of features turned on at once,
2592  * and ending with the smallest set of features.  This way large combinations
2593  * can be allocated if they're turned on, and smaller combinations are the
2594  * fall through conditions.
2595  *
2596  **/
2597 static void ixgbevf_set_num_queues(struct ixgbevf_adapter *adapter)
2598 {
2599         struct ixgbe_hw *hw = &adapter->hw;
2600         unsigned int def_q = 0;
2601         unsigned int num_tcs = 0;
2602         int err;
2603
2604         /* Start with base case */
2605         adapter->num_rx_queues = 1;
2606         adapter->num_tx_queues = 1;
2607         adapter->num_xdp_queues = 0;
2608
2609         spin_lock_bh(&adapter->mbx_lock);
2610
2611         /* fetch queue configuration from the PF */
2612         err = ixgbevf_get_queues(hw, &num_tcs, &def_q);
2613
2614         spin_unlock_bh(&adapter->mbx_lock);
2615
2616         if (err)
2617                 return;
2618
2619         /* we need as many queues as traffic classes */
2620         if (num_tcs > 1) {
2621                 adapter->num_rx_queues = num_tcs;
2622         } else {
2623                 u16 rss = min_t(u16, num_online_cpus(), IXGBEVF_MAX_RSS_QUEUES);
2624
2625                 switch (hw->api_version) {
2626                 case ixgbe_mbox_api_11:
2627                 case ixgbe_mbox_api_12:
2628                 case ixgbe_mbox_api_13:
2629                 case ixgbe_mbox_api_14:
2630                         if (adapter->xdp_prog &&
2631                             hw->mac.max_tx_queues == rss)
2632                                 rss = rss > 3 ? 2 : 1;
2633
2634                         adapter->num_rx_queues = rss;
2635                         adapter->num_tx_queues = rss;
2636                         adapter->num_xdp_queues = adapter->xdp_prog ? rss : 0;
2637                         break;
2638                 default:
2639                         break;
2640                 }
2641         }
2642 }
2643
2644 /**
2645  * ixgbevf_set_interrupt_capability - set MSI-X or FAIL if not supported
2646  * @adapter: board private structure to initialize
2647  *
2648  * Attempt to configure the interrupts using the best available
2649  * capabilities of the hardware and the kernel.
2650  **/
2651 static int ixgbevf_set_interrupt_capability(struct ixgbevf_adapter *adapter)
2652 {
2653         int vector, v_budget;
2654
2655         /* It's easy to be greedy for MSI-X vectors, but it really
2656          * doesn't do us much good if we have a lot more vectors
2657          * than CPU's.  So let's be conservative and only ask for
2658          * (roughly) the same number of vectors as there are CPU's.
2659          * The default is to use pairs of vectors.
2660          */
2661         v_budget = max(adapter->num_rx_queues, adapter->num_tx_queues);
2662         v_budget = min_t(int, v_budget, num_online_cpus());
2663         v_budget += NON_Q_VECTORS;
2664
2665         adapter->msix_entries = kcalloc(v_budget,
2666                                         sizeof(struct msix_entry), GFP_KERNEL);
2667         if (!adapter->msix_entries)
2668                 return -ENOMEM;
2669
2670         for (vector = 0; vector < v_budget; vector++)
2671                 adapter->msix_entries[vector].entry = vector;
2672
2673         /* A failure in MSI-X entry allocation isn't fatal, but the VF driver
2674          * does not support any other modes, so we will simply fail here. Note
2675          * that we clean up the msix_entries pointer else-where.
2676          */
2677         return ixgbevf_acquire_msix_vectors(adapter, v_budget);
2678 }
2679
2680 static void ixgbevf_add_ring(struct ixgbevf_ring *ring,
2681                              struct ixgbevf_ring_container *head)
2682 {
2683         ring->next = head->ring;
2684         head->ring = ring;
2685         head->count++;
2686 }
2687
2688 /**
2689  * ixgbevf_alloc_q_vector - Allocate memory for a single interrupt vector
2690  * @adapter: board private structure to initialize
2691  * @v_idx: index of vector in adapter struct
2692  * @txr_count: number of Tx rings for q vector
2693  * @txr_idx: index of first Tx ring to assign
2694  * @xdp_count: total number of XDP rings to allocate
2695  * @xdp_idx: index of first XDP ring to allocate
2696  * @rxr_count: number of Rx rings for q vector
2697  * @rxr_idx: index of first Rx ring to assign
2698  *
2699  * We allocate one q_vector.  If allocation fails we return -ENOMEM.
2700  **/
2701 static int ixgbevf_alloc_q_vector(struct ixgbevf_adapter *adapter, int v_idx,
2702                                   int txr_count, int txr_idx,
2703                                   int xdp_count, int xdp_idx,
2704                                   int rxr_count, int rxr_idx)
2705 {
2706         struct ixgbevf_q_vector *q_vector;
2707         int reg_idx = txr_idx + xdp_idx;
2708         struct ixgbevf_ring *ring;
2709         int ring_count, size;
2710
2711         ring_count = txr_count + xdp_count + rxr_count;
2712         size = sizeof(*q_vector) + (sizeof(*ring) * ring_count);
2713
2714         /* allocate q_vector and rings */
2715         q_vector = kzalloc(size, GFP_KERNEL);
2716         if (!q_vector)
2717                 return -ENOMEM;
2718
2719         /* initialize NAPI */
2720         netif_napi_add(adapter->netdev, &q_vector->napi, ixgbevf_poll, 64);
2721
2722         /* tie q_vector and adapter together */
2723         adapter->q_vector[v_idx] = q_vector;
2724         q_vector->adapter = adapter;
2725         q_vector->v_idx = v_idx;
2726
2727         /* initialize pointer to rings */
2728         ring = q_vector->ring;
2729
2730         while (txr_count) {
2731                 /* assign generic ring traits */
2732                 ring->dev = &adapter->pdev->dev;
2733                 ring->netdev = adapter->netdev;
2734
2735                 /* configure backlink on ring */
2736                 ring->q_vector = q_vector;
2737
2738                 /* update q_vector Tx values */
2739                 ixgbevf_add_ring(ring, &q_vector->tx);
2740
2741                 /* apply Tx specific ring traits */
2742                 ring->count = adapter->tx_ring_count;
2743                 ring->queue_index = txr_idx;
2744                 ring->reg_idx = reg_idx;
2745
2746                 /* assign ring to adapter */
2747                  adapter->tx_ring[txr_idx] = ring;
2748
2749                 /* update count and index */
2750                 txr_count--;
2751                 txr_idx++;
2752                 reg_idx++;
2753
2754                 /* push pointer to next ring */
2755                 ring++;
2756         }
2757
2758         while (xdp_count) {
2759                 /* assign generic ring traits */
2760                 ring->dev = &adapter->pdev->dev;
2761                 ring->netdev = adapter->netdev;
2762
2763                 /* configure backlink on ring */
2764                 ring->q_vector = q_vector;
2765
2766                 /* update q_vector Tx values */
2767                 ixgbevf_add_ring(ring, &q_vector->tx);
2768
2769                 /* apply Tx specific ring traits */
2770                 ring->count = adapter->tx_ring_count;
2771                 ring->queue_index = xdp_idx;
2772                 ring->reg_idx = reg_idx;
2773                 set_ring_xdp(ring);
2774
2775                 /* assign ring to adapter */
2776                 adapter->xdp_ring[xdp_idx] = ring;
2777
2778                 /* update count and index */
2779                 xdp_count--;
2780                 xdp_idx++;
2781                 reg_idx++;
2782
2783                 /* push pointer to next ring */
2784                 ring++;
2785         }
2786
2787         while (rxr_count) {
2788                 /* assign generic ring traits */
2789                 ring->dev = &adapter->pdev->dev;
2790                 ring->netdev = adapter->netdev;
2791
2792                 /* configure backlink on ring */
2793                 ring->q_vector = q_vector;
2794
2795                 /* update q_vector Rx values */
2796                 ixgbevf_add_ring(ring, &q_vector->rx);
2797
2798                 /* apply Rx specific ring traits */
2799                 ring->count = adapter->rx_ring_count;
2800                 ring->queue_index = rxr_idx;
2801                 ring->reg_idx = rxr_idx;
2802
2803                 /* assign ring to adapter */
2804                 adapter->rx_ring[rxr_idx] = ring;
2805
2806                 /* update count and index */
2807                 rxr_count--;
2808                 rxr_idx++;
2809
2810                 /* push pointer to next ring */
2811                 ring++;
2812         }
2813
2814         return 0;
2815 }
2816
2817 /**
2818  * ixgbevf_free_q_vector - Free memory allocated for specific interrupt vector
2819  * @adapter: board private structure to initialize
2820  * @v_idx: index of vector in adapter struct
2821  *
2822  * This function frees the memory allocated to the q_vector.  In addition if
2823  * NAPI is enabled it will delete any references to the NAPI struct prior
2824  * to freeing the q_vector.
2825  **/
2826 static void ixgbevf_free_q_vector(struct ixgbevf_adapter *adapter, int v_idx)
2827 {
2828         struct ixgbevf_q_vector *q_vector = adapter->q_vector[v_idx];
2829         struct ixgbevf_ring *ring;
2830
2831         ixgbevf_for_each_ring(ring, q_vector->tx) {
2832                 if (ring_is_xdp(ring))
2833                         adapter->xdp_ring[ring->queue_index] = NULL;
2834                 else
2835                         adapter->tx_ring[ring->queue_index] = NULL;
2836         }
2837
2838         ixgbevf_for_each_ring(ring, q_vector->rx)
2839                 adapter->rx_ring[ring->queue_index] = NULL;
2840
2841         adapter->q_vector[v_idx] = NULL;
2842         netif_napi_del(&q_vector->napi);
2843
2844         /* ixgbevf_get_stats() might access the rings on this vector,
2845          * we must wait a grace period before freeing it.
2846          */
2847         kfree_rcu(q_vector, rcu);
2848 }
2849
2850 /**
2851  * ixgbevf_alloc_q_vectors - Allocate memory for interrupt vectors
2852  * @adapter: board private structure to initialize
2853  *
2854  * We allocate one q_vector per queue interrupt.  If allocation fails we
2855  * return -ENOMEM.
2856  **/
2857 static int ixgbevf_alloc_q_vectors(struct ixgbevf_adapter *adapter)
2858 {
2859         int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2860         int rxr_remaining = adapter->num_rx_queues;
2861         int txr_remaining = adapter->num_tx_queues;
2862         int xdp_remaining = adapter->num_xdp_queues;
2863         int rxr_idx = 0, txr_idx = 0, xdp_idx = 0, v_idx = 0;
2864         int err;
2865
2866         if (q_vectors >= (rxr_remaining + txr_remaining + xdp_remaining)) {
2867                 for (; rxr_remaining; v_idx++, q_vectors--) {
2868                         int rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors);
2869
2870                         err = ixgbevf_alloc_q_vector(adapter, v_idx,
2871                                                      0, 0, 0, 0, rqpv, rxr_idx);
2872                         if (err)
2873                                 goto err_out;
2874
2875                         /* update counts and index */
2876                         rxr_remaining -= rqpv;
2877                         rxr_idx += rqpv;
2878                 }
2879         }
2880
2881         for (; q_vectors; v_idx++, q_vectors--) {
2882                 int rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors);
2883                 int tqpv = DIV_ROUND_UP(txr_remaining, q_vectors);
2884                 int xqpv = DIV_ROUND_UP(xdp_remaining, q_vectors);
2885
2886                 err = ixgbevf_alloc_q_vector(adapter, v_idx,
2887                                              tqpv, txr_idx,
2888                                              xqpv, xdp_idx,
2889                                              rqpv, rxr_idx);
2890
2891                 if (err)
2892                         goto err_out;
2893
2894                 /* update counts and index */
2895                 rxr_remaining -= rqpv;
2896                 rxr_idx += rqpv;
2897                 txr_remaining -= tqpv;
2898                 txr_idx += tqpv;
2899                 xdp_remaining -= xqpv;
2900                 xdp_idx += xqpv;
2901         }
2902
2903         return 0;
2904
2905 err_out:
2906         while (v_idx) {
2907                 v_idx--;
2908                 ixgbevf_free_q_vector(adapter, v_idx);
2909         }
2910
2911         return -ENOMEM;
2912 }
2913
2914 /**
2915  * ixgbevf_free_q_vectors - Free memory allocated for interrupt vectors
2916  * @adapter: board private structure to initialize
2917  *
2918  * This function frees the memory allocated to the q_vectors.  In addition if
2919  * NAPI is enabled it will delete any references to the NAPI struct prior
2920  * to freeing the q_vector.
2921  **/
2922 static void ixgbevf_free_q_vectors(struct ixgbevf_adapter *adapter)
2923 {
2924         int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2925
2926         while (q_vectors) {
2927                 q_vectors--;
2928                 ixgbevf_free_q_vector(adapter, q_vectors);
2929         }
2930 }
2931
2932 /**
2933  * ixgbevf_reset_interrupt_capability - Reset MSIX setup
2934  * @adapter: board private structure
2935  *
2936  **/
2937 static void ixgbevf_reset_interrupt_capability(struct ixgbevf_adapter *adapter)
2938 {
2939         if (!adapter->msix_entries)
2940                 return;
2941
2942         pci_disable_msix(adapter->pdev);
2943         kfree(adapter->msix_entries);
2944         adapter->msix_entries = NULL;
2945 }
2946
2947 /**
2948  * ixgbevf_init_interrupt_scheme - Determine if MSIX is supported and init
2949  * @adapter: board private structure to initialize
2950  *
2951  **/
2952 static int ixgbevf_init_interrupt_scheme(struct ixgbevf_adapter *adapter)
2953 {
2954         int err;
2955
2956         /* Number of supported queues */
2957         ixgbevf_set_num_queues(adapter);
2958
2959         err = ixgbevf_set_interrupt_capability(adapter);
2960         if (err) {
2961                 hw_dbg(&adapter->hw,
2962                        "Unable to setup interrupt capabilities\n");
2963                 goto err_set_interrupt;
2964         }
2965
2966         err = ixgbevf_alloc_q_vectors(adapter);
2967         if (err) {
2968                 hw_dbg(&adapter->hw, "Unable to allocate memory for queue vectors\n");
2969                 goto err_alloc_q_vectors;
2970         }
2971
2972         hw_dbg(&adapter->hw, "Multiqueue %s: Rx Queue count = %u, Tx Queue count = %u XDP Queue count %u\n",
2973                (adapter->num_rx_queues > 1) ? "Enabled" : "Disabled",
2974                adapter->num_rx_queues, adapter->num_tx_queues,
2975                adapter->num_xdp_queues);
2976
2977         set_bit(__IXGBEVF_DOWN, &adapter->state);
2978
2979         return 0;
2980 err_alloc_q_vectors:
2981         ixgbevf_reset_interrupt_capability(adapter);
2982 err_set_interrupt:
2983         return err;
2984 }
2985
2986 /**
2987  * ixgbevf_clear_interrupt_scheme - Clear the current interrupt scheme settings
2988  * @adapter: board private structure to clear interrupt scheme on
2989  *
2990  * We go through and clear interrupt specific resources and reset the structure
2991  * to pre-load conditions
2992  **/
2993 static void ixgbevf_clear_interrupt_scheme(struct ixgbevf_adapter *adapter)
2994 {
2995         adapter->num_tx_queues = 0;
2996         adapter->num_xdp_queues = 0;
2997         adapter->num_rx_queues = 0;
2998
2999         ixgbevf_free_q_vectors(adapter);
3000         ixgbevf_reset_interrupt_capability(adapter);
3001 }
3002
3003 /**
3004  * ixgbevf_sw_init - Initialize general software structures
3005  * @adapter: board private structure to initialize
3006  *
3007  * ixgbevf_sw_init initializes the Adapter private data structure.
3008  * Fields are initialized based on PCI device information and
3009  * OS network device settings (MTU size).
3010  **/
3011 static int ixgbevf_sw_init(struct ixgbevf_adapter *adapter)
3012 {
3013         struct ixgbe_hw *hw = &adapter->hw;
3014         struct pci_dev *pdev = adapter->pdev;
3015         struct net_device *netdev = adapter->netdev;
3016         int err;
3017
3018         /* PCI config space info */
3019         hw->vendor_id = pdev->vendor;
3020         hw->device_id = pdev->device;
3021         hw->revision_id = pdev->revision;
3022         hw->subsystem_vendor_id = pdev->subsystem_vendor;
3023         hw->subsystem_device_id = pdev->subsystem_device;
3024
3025         hw->mbx.ops.init_params(hw);
3026
3027         if (hw->mac.type >= ixgbe_mac_X550_vf) {
3028                 err = ixgbevf_init_rss_key(adapter);
3029                 if (err)
3030                         goto out;
3031         }
3032
3033         /* assume legacy case in which PF would only give VF 2 queues */
3034         hw->mac.max_tx_queues = 2;
3035         hw->mac.max_rx_queues = 2;
3036
3037         /* lock to protect mailbox accesses */
3038         spin_lock_init(&adapter->mbx_lock);
3039
3040         err = hw->mac.ops.reset_hw(hw);
3041         if (err) {
3042                 dev_info(&pdev->dev,
3043                          "PF still in reset state.  Is the PF interface up?\n");
3044         } else {
3045                 err = hw->mac.ops.init_hw(hw);
3046                 if (err) {
3047                         pr_err("init_shared_code failed: %d\n", err);
3048                         goto out;
3049                 }
3050                 ixgbevf_negotiate_api(adapter);
3051                 err = hw->mac.ops.get_mac_addr(hw, hw->mac.addr);
3052                 if (err)
3053                         dev_info(&pdev->dev, "Error reading MAC address\n");
3054                 else if (is_zero_ether_addr(adapter->hw.mac.addr))
3055                         dev_info(&pdev->dev,
3056                                  "MAC address not assigned by administrator.\n");
3057                 eth_hw_addr_set(netdev, hw->mac.addr);
3058         }
3059
3060         if (!is_valid_ether_addr(netdev->dev_addr)) {
3061                 dev_info(&pdev->dev, "Assigning random MAC address\n");
3062                 eth_hw_addr_random(netdev);
3063                 ether_addr_copy(hw->mac.addr, netdev->dev_addr);
3064                 ether_addr_copy(hw->mac.perm_addr, netdev->dev_addr);
3065         }
3066
3067         /* Enable dynamic interrupt throttling rates */
3068         adapter->rx_itr_setting = 1;
3069         adapter->tx_itr_setting = 1;
3070
3071         /* set default ring sizes */
3072         adapter->tx_ring_count = IXGBEVF_DEFAULT_TXD;
3073         adapter->rx_ring_count = IXGBEVF_DEFAULT_RXD;
3074
3075         set_bit(__IXGBEVF_DOWN, &adapter->state);
3076         return 0;
3077
3078 out:
3079         return err;
3080 }
3081
3082 #define UPDATE_VF_COUNTER_32bit(reg, last_counter, counter)     \
3083         {                                                       \
3084                 u32 current_counter = IXGBE_READ_REG(hw, reg);  \
3085                 if (current_counter < last_counter)             \
3086                         counter += 0x100000000LL;               \
3087                 last_counter = current_counter;                 \
3088                 counter &= 0xFFFFFFFF00000000LL;                \
3089                 counter |= current_counter;                     \
3090         }
3091
3092 #define UPDATE_VF_COUNTER_36bit(reg_lsb, reg_msb, last_counter, counter) \
3093         {                                                                \
3094                 u64 current_counter_lsb = IXGBE_READ_REG(hw, reg_lsb);   \
3095                 u64 current_counter_msb = IXGBE_READ_REG(hw, reg_msb);   \
3096                 u64 current_counter = (current_counter_msb << 32) |      \
3097                         current_counter_lsb;                             \
3098                 if (current_counter < last_counter)                      \
3099                         counter += 0x1000000000LL;                       \
3100                 last_counter = current_counter;                          \
3101                 counter &= 0xFFFFFFF000000000LL;                         \
3102                 counter |= current_counter;                              \
3103         }
3104 /**
3105  * ixgbevf_update_stats - Update the board statistics counters.
3106  * @adapter: board private structure
3107  **/
3108 void ixgbevf_update_stats(struct ixgbevf_adapter *adapter)
3109 {
3110         struct ixgbe_hw *hw = &adapter->hw;
3111         u64 alloc_rx_page_failed = 0, alloc_rx_buff_failed = 0;
3112         u64 alloc_rx_page = 0, hw_csum_rx_error = 0;
3113         int i;
3114
3115         if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
3116             test_bit(__IXGBEVF_RESETTING, &adapter->state))
3117                 return;
3118
3119         UPDATE_VF_COUNTER_32bit(IXGBE_VFGPRC, adapter->stats.last_vfgprc,
3120                                 adapter->stats.vfgprc);
3121         UPDATE_VF_COUNTER_32bit(IXGBE_VFGPTC, adapter->stats.last_vfgptc,
3122                                 adapter->stats.vfgptc);
3123         UPDATE_VF_COUNTER_36bit(IXGBE_VFGORC_LSB, IXGBE_VFGORC_MSB,
3124                                 adapter->stats.last_vfgorc,
3125                                 adapter->stats.vfgorc);
3126         UPDATE_VF_COUNTER_36bit(IXGBE_VFGOTC_LSB, IXGBE_VFGOTC_MSB,
3127                                 adapter->stats.last_vfgotc,
3128                                 adapter->stats.vfgotc);
3129         UPDATE_VF_COUNTER_32bit(IXGBE_VFMPRC, adapter->stats.last_vfmprc,
3130                                 adapter->stats.vfmprc);
3131
3132         for (i = 0;  i  < adapter->num_rx_queues;  i++) {
3133                 struct ixgbevf_ring *rx_ring = adapter->rx_ring[i];
3134
3135                 hw_csum_rx_error += rx_ring->rx_stats.csum_err;
3136                 alloc_rx_page_failed += rx_ring->rx_stats.alloc_rx_page_failed;
3137                 alloc_rx_buff_failed += rx_ring->rx_stats.alloc_rx_buff_failed;
3138                 alloc_rx_page += rx_ring->rx_stats.alloc_rx_page;
3139         }
3140
3141         adapter->hw_csum_rx_error = hw_csum_rx_error;
3142         adapter->alloc_rx_page_failed = alloc_rx_page_failed;
3143         adapter->alloc_rx_buff_failed = alloc_rx_buff_failed;
3144         adapter->alloc_rx_page = alloc_rx_page;
3145 }
3146
3147 /**
3148  * ixgbevf_service_timer - Timer Call-back
3149  * @t: pointer to timer_list struct
3150  **/
3151 static void ixgbevf_service_timer(struct timer_list *t)
3152 {
3153         struct ixgbevf_adapter *adapter = from_timer(adapter, t,
3154                                                      service_timer);
3155
3156         /* Reset the timer */
3157         mod_timer(&adapter->service_timer, (HZ * 2) + jiffies);
3158
3159         ixgbevf_service_event_schedule(adapter);
3160 }
3161
3162 static void ixgbevf_reset_subtask(struct ixgbevf_adapter *adapter)
3163 {
3164         if (!test_and_clear_bit(__IXGBEVF_RESET_REQUESTED, &adapter->state))
3165                 return;
3166
3167         rtnl_lock();
3168         /* If we're already down or resetting, just bail */
3169         if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
3170             test_bit(__IXGBEVF_REMOVING, &adapter->state) ||
3171             test_bit(__IXGBEVF_RESETTING, &adapter->state)) {
3172                 rtnl_unlock();
3173                 return;
3174         }
3175
3176         adapter->tx_timeout_count++;
3177
3178         ixgbevf_reinit_locked(adapter);
3179         rtnl_unlock();
3180 }
3181
3182 /**
3183  * ixgbevf_check_hang_subtask - check for hung queues and dropped interrupts
3184  * @adapter: pointer to the device adapter structure
3185  *
3186  * This function serves two purposes.  First it strobes the interrupt lines
3187  * in order to make certain interrupts are occurring.  Secondly it sets the
3188  * bits needed to check for TX hangs.  As a result we should immediately
3189  * determine if a hang has occurred.
3190  **/
3191 static void ixgbevf_check_hang_subtask(struct ixgbevf_adapter *adapter)
3192 {
3193         struct ixgbe_hw *hw = &adapter->hw;
3194         u32 eics = 0;
3195         int i;
3196
3197         /* If we're down or resetting, just bail */
3198         if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
3199             test_bit(__IXGBEVF_RESETTING, &adapter->state))
3200                 return;
3201
3202         /* Force detection of hung controller */
3203         if (netif_carrier_ok(adapter->netdev)) {
3204                 for (i = 0; i < adapter->num_tx_queues; i++)
3205                         set_check_for_tx_hang(adapter->tx_ring[i]);
3206                 for (i = 0; i < adapter->num_xdp_queues; i++)
3207                         set_check_for_tx_hang(adapter->xdp_ring[i]);
3208         }
3209
3210         /* get one bit for every active Tx/Rx interrupt vector */
3211         for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) {
3212                 struct ixgbevf_q_vector *qv = adapter->q_vector[i];
3213
3214                 if (qv->rx.ring || qv->tx.ring)
3215                         eics |= BIT(i);
3216         }
3217
3218         /* Cause software interrupt to ensure rings are cleaned */
3219         IXGBE_WRITE_REG(hw, IXGBE_VTEICS, eics);
3220 }
3221
3222 /**
3223  * ixgbevf_watchdog_update_link - update the link status
3224  * @adapter: pointer to the device adapter structure
3225  **/
3226 static void ixgbevf_watchdog_update_link(struct ixgbevf_adapter *adapter)
3227 {
3228         struct ixgbe_hw *hw = &adapter->hw;
3229         u32 link_speed = adapter->link_speed;
3230         bool link_up = adapter->link_up;
3231         s32 err;
3232
3233         spin_lock_bh(&adapter->mbx_lock);
3234
3235         err = hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
3236
3237         spin_unlock_bh(&adapter->mbx_lock);
3238
3239         /* if check for link returns error we will need to reset */
3240         if (err && time_after(jiffies, adapter->last_reset + (10 * HZ))) {
3241                 set_bit(__IXGBEVF_RESET_REQUESTED, &adapter->state);
3242                 link_up = false;
3243         }
3244
3245         adapter->link_up = link_up;
3246         adapter->link_speed = link_speed;
3247 }
3248
3249 /**
3250  * ixgbevf_watchdog_link_is_up - update netif_carrier status and
3251  *                               print link up message
3252  * @adapter: pointer to the device adapter structure
3253  **/
3254 static void ixgbevf_watchdog_link_is_up(struct ixgbevf_adapter *adapter)
3255 {
3256         struct net_device *netdev = adapter->netdev;
3257
3258         /* only continue if link was previously down */
3259         if (netif_carrier_ok(netdev))
3260                 return;
3261
3262         dev_info(&adapter->pdev->dev, "NIC Link is Up %s\n",
3263                  (adapter->link_speed == IXGBE_LINK_SPEED_10GB_FULL) ?
3264                  "10 Gbps" :
3265                  (adapter->link_speed == IXGBE_LINK_SPEED_1GB_FULL) ?
3266                  "1 Gbps" :
3267                  (adapter->link_speed == IXGBE_LINK_SPEED_100_FULL) ?
3268                  "100 Mbps" :
3269                  "unknown speed");
3270
3271         netif_carrier_on(netdev);
3272 }
3273
3274 /**
3275  * ixgbevf_watchdog_link_is_down - update netif_carrier status and
3276  *                                 print link down message
3277  * @adapter: pointer to the adapter structure
3278  **/
3279 static void ixgbevf_watchdog_link_is_down(struct ixgbevf_adapter *adapter)
3280 {
3281         struct net_device *netdev = adapter->netdev;
3282
3283         adapter->link_speed = 0;
3284
3285         /* only continue if link was up previously */
3286         if (!netif_carrier_ok(netdev))
3287                 return;
3288
3289         dev_info(&adapter->pdev->dev, "NIC Link is Down\n");
3290
3291         netif_carrier_off(netdev);
3292 }
3293
3294 /**
3295  * ixgbevf_watchdog_subtask - worker thread to bring link up
3296  * @adapter: board private structure
3297  **/
3298 static void ixgbevf_watchdog_subtask(struct ixgbevf_adapter *adapter)
3299 {
3300         /* if interface is down do nothing */
3301         if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
3302             test_bit(__IXGBEVF_RESETTING, &adapter->state))
3303                 return;
3304
3305         ixgbevf_watchdog_update_link(adapter);
3306
3307         if (adapter->link_up)
3308                 ixgbevf_watchdog_link_is_up(adapter);
3309         else
3310                 ixgbevf_watchdog_link_is_down(adapter);
3311
3312         ixgbevf_update_stats(adapter);
3313 }
3314
3315 /**
3316  * ixgbevf_service_task - manages and runs subtasks
3317  * @work: pointer to work_struct containing our data
3318  **/
3319 static void ixgbevf_service_task(struct work_struct *work)
3320 {
3321         struct ixgbevf_adapter *adapter = container_of(work,
3322                                                        struct ixgbevf_adapter,
3323                                                        service_task);
3324         struct ixgbe_hw *hw = &adapter->hw;
3325
3326         if (IXGBE_REMOVED(hw->hw_addr)) {
3327                 if (!test_bit(__IXGBEVF_DOWN, &adapter->state)) {
3328                         rtnl_lock();
3329                         ixgbevf_down(adapter);
3330                         rtnl_unlock();
3331                 }
3332                 return;
3333         }
3334
3335         ixgbevf_queue_reset_subtask(adapter);
3336         ixgbevf_reset_subtask(adapter);
3337         ixgbevf_watchdog_subtask(adapter);
3338         ixgbevf_check_hang_subtask(adapter);
3339
3340         ixgbevf_service_event_complete(adapter);
3341 }
3342
3343 /**
3344  * ixgbevf_free_tx_resources - Free Tx Resources per Queue
3345  * @tx_ring: Tx descriptor ring for a specific queue
3346  *
3347  * Free all transmit software resources
3348  **/
3349 void ixgbevf_free_tx_resources(struct ixgbevf_ring *tx_ring)
3350 {
3351         ixgbevf_clean_tx_ring(tx_ring);
3352
3353         vfree(tx_ring->tx_buffer_info);
3354         tx_ring->tx_buffer_info = NULL;
3355
3356         /* if not set, then don't free */
3357         if (!tx_ring->desc)
3358                 return;
3359
3360         dma_free_coherent(tx_ring->dev, tx_ring->size, tx_ring->desc,
3361                           tx_ring->dma);
3362
3363         tx_ring->desc = NULL;
3364 }
3365
3366 /**
3367  * ixgbevf_free_all_tx_resources - Free Tx Resources for All Queues
3368  * @adapter: board private structure
3369  *
3370  * Free all transmit software resources
3371  **/
3372 static void ixgbevf_free_all_tx_resources(struct ixgbevf_adapter *adapter)
3373 {
3374         int i;
3375
3376         for (i = 0; i < adapter->num_tx_queues; i++)
3377                 if (adapter->tx_ring[i]->desc)
3378                         ixgbevf_free_tx_resources(adapter->tx_ring[i]);
3379         for (i = 0; i < adapter->num_xdp_queues; i++)
3380                 if (adapter->xdp_ring[i]->desc)
3381                         ixgbevf_free_tx_resources(adapter->xdp_ring[i]);
3382 }
3383
3384 /**
3385  * ixgbevf_setup_tx_resources - allocate Tx resources (Descriptors)
3386  * @tx_ring: Tx descriptor ring (for a specific queue) to setup
3387  *
3388  * Return 0 on success, negative on failure
3389  **/
3390 int ixgbevf_setup_tx_resources(struct ixgbevf_ring *tx_ring)
3391 {
3392         struct ixgbevf_adapter *adapter = netdev_priv(tx_ring->netdev);
3393         int size;
3394
3395         size = sizeof(struct ixgbevf_tx_buffer) * tx_ring->count;
3396         tx_ring->tx_buffer_info = vmalloc(size);
3397         if (!tx_ring->tx_buffer_info)
3398                 goto err;
3399
3400         u64_stats_init(&tx_ring->syncp);
3401
3402         /* round up to nearest 4K */
3403         tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
3404         tx_ring->size = ALIGN(tx_ring->size, 4096);
3405
3406         tx_ring->desc = dma_alloc_coherent(tx_ring->dev, tx_ring->size,
3407                                            &tx_ring->dma, GFP_KERNEL);
3408         if (!tx_ring->desc)
3409                 goto err;
3410
3411         return 0;
3412
3413 err:
3414         vfree(tx_ring->tx_buffer_info);
3415         tx_ring->tx_buffer_info = NULL;
3416         hw_dbg(&adapter->hw, "Unable to allocate memory for the transmit descriptor ring\n");
3417         return -ENOMEM;
3418 }
3419
3420 /**
3421  * ixgbevf_setup_all_tx_resources - allocate all queues Tx resources
3422  * @adapter: board private structure
3423  *
3424  * If this function returns with an error, then it's possible one or
3425  * more of the rings is populated (while the rest are not).  It is the
3426  * callers duty to clean those orphaned rings.
3427  *
3428  * Return 0 on success, negative on failure
3429  **/
3430 static int ixgbevf_setup_all_tx_resources(struct ixgbevf_adapter *adapter)
3431 {
3432         int i, j = 0, err = 0;
3433
3434         for (i = 0; i < adapter->num_tx_queues; i++) {
3435                 err = ixgbevf_setup_tx_resources(adapter->tx_ring[i]);
3436                 if (!err)
3437                         continue;
3438                 hw_dbg(&adapter->hw, "Allocation for Tx Queue %u failed\n", i);
3439                 goto err_setup_tx;
3440         }
3441
3442         for (j = 0; j < adapter->num_xdp_queues; j++) {
3443                 err = ixgbevf_setup_tx_resources(adapter->xdp_ring[j]);
3444                 if (!err)
3445                         continue;
3446                 hw_dbg(&adapter->hw, "Allocation for XDP Queue %u failed\n", j);
3447                 goto err_setup_tx;
3448         }
3449
3450         return 0;
3451 err_setup_tx:
3452         /* rewind the index freeing the rings as we go */
3453         while (j--)
3454                 ixgbevf_free_tx_resources(adapter->xdp_ring[j]);
3455         while (i--)
3456                 ixgbevf_free_tx_resources(adapter->tx_ring[i]);
3457
3458         return err;
3459 }
3460
3461 /**
3462  * ixgbevf_setup_rx_resources - allocate Rx resources (Descriptors)
3463  * @adapter: board private structure
3464  * @rx_ring: Rx descriptor ring (for a specific queue) to setup
3465  *
3466  * Returns 0 on success, negative on failure
3467  **/
3468 int ixgbevf_setup_rx_resources(struct ixgbevf_adapter *adapter,
3469                                struct ixgbevf_ring *rx_ring)
3470 {
3471         int size;
3472
3473         size = sizeof(struct ixgbevf_rx_buffer) * rx_ring->count;
3474         rx_ring->rx_buffer_info = vmalloc(size);
3475         if (!rx_ring->rx_buffer_info)
3476                 goto err;
3477
3478         u64_stats_init(&rx_ring->syncp);
3479
3480         /* Round up to nearest 4K */
3481         rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
3482         rx_ring->size = ALIGN(rx_ring->size, 4096);
3483
3484         rx_ring->desc = dma_alloc_coherent(rx_ring->dev, rx_ring->size,
3485                                            &rx_ring->dma, GFP_KERNEL);
3486
3487         if (!rx_ring->desc)
3488                 goto err;
3489
3490         /* XDP RX-queue info */
3491         if (xdp_rxq_info_reg(&rx_ring->xdp_rxq, adapter->netdev,
3492                              rx_ring->queue_index, 0) < 0)
3493                 goto err;
3494
3495         rx_ring->xdp_prog = adapter->xdp_prog;
3496
3497         return 0;
3498 err:
3499         vfree(rx_ring->rx_buffer_info);
3500         rx_ring->rx_buffer_info = NULL;
3501         dev_err(rx_ring->dev, "Unable to allocate memory for the Rx descriptor ring\n");
3502         return -ENOMEM;
3503 }
3504
3505 /**
3506  * ixgbevf_setup_all_rx_resources - allocate all queues Rx resources
3507  * @adapter: board private structure
3508  *
3509  * If this function returns with an error, then it's possible one or
3510  * more of the rings is populated (while the rest are not).  It is the
3511  * callers duty to clean those orphaned rings.
3512  *
3513  * Return 0 on success, negative on failure
3514  **/
3515 static int ixgbevf_setup_all_rx_resources(struct ixgbevf_adapter *adapter)
3516 {
3517         int i, err = 0;
3518
3519         for (i = 0; i < adapter->num_rx_queues; i++) {
3520                 err = ixgbevf_setup_rx_resources(adapter, adapter->rx_ring[i]);
3521                 if (!err)
3522                         continue;
3523                 hw_dbg(&adapter->hw, "Allocation for Rx Queue %u failed\n", i);
3524                 goto err_setup_rx;
3525         }
3526
3527         return 0;
3528 err_setup_rx:
3529         /* rewind the index freeing the rings as we go */
3530         while (i--)
3531                 ixgbevf_free_rx_resources(adapter->rx_ring[i]);
3532         return err;
3533 }
3534
3535 /**
3536  * ixgbevf_free_rx_resources - Free Rx Resources
3537  * @rx_ring: ring to clean the resources from
3538  *
3539  * Free all receive software resources
3540  **/
3541 void ixgbevf_free_rx_resources(struct ixgbevf_ring *rx_ring)
3542 {
3543         ixgbevf_clean_rx_ring(rx_ring);
3544
3545         rx_ring->xdp_prog = NULL;
3546         xdp_rxq_info_unreg(&rx_ring->xdp_rxq);
3547         vfree(rx_ring->rx_buffer_info);
3548         rx_ring->rx_buffer_info = NULL;
3549
3550         dma_free_coherent(rx_ring->dev, rx_ring->size, rx_ring->desc,
3551                           rx_ring->dma);
3552
3553         rx_ring->desc = NULL;
3554 }
3555
3556 /**
3557  * ixgbevf_free_all_rx_resources - Free Rx Resources for All Queues
3558  * @adapter: board private structure
3559  *
3560  * Free all receive software resources
3561  **/
3562 static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter *adapter)
3563 {
3564         int i;
3565
3566         for (i = 0; i < adapter->num_rx_queues; i++)
3567                 if (adapter->rx_ring[i]->desc)
3568                         ixgbevf_free_rx_resources(adapter->rx_ring[i]);
3569 }
3570
3571 /**
3572  * ixgbevf_open - Called when a network interface is made active
3573  * @netdev: network interface device structure
3574  *
3575  * Returns 0 on success, negative value on failure
3576  *
3577  * The open entry point is called when a network interface is made
3578  * active by the system (IFF_UP).  At this point all resources needed
3579  * for transmit and receive operations are allocated, the interrupt
3580  * handler is registered with the OS, the watchdog timer is started,
3581  * and the stack is notified that the interface is ready.
3582  **/
3583 int ixgbevf_open(struct net_device *netdev)
3584 {
3585         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3586         struct ixgbe_hw *hw = &adapter->hw;
3587         int err;
3588
3589         /* A previous failure to open the device because of a lack of
3590          * available MSIX vector resources may have reset the number
3591          * of msix vectors variable to zero.  The only way to recover
3592          * is to unload/reload the driver and hope that the system has
3593          * been able to recover some MSIX vector resources.
3594          */
3595         if (!adapter->num_msix_vectors)
3596                 return -ENOMEM;
3597
3598         if (hw->adapter_stopped) {
3599                 ixgbevf_reset(adapter);
3600                 /* if adapter is still stopped then PF isn't up and
3601                  * the VF can't start.
3602                  */
3603                 if (hw->adapter_stopped) {
3604                         err = IXGBE_ERR_MBX;
3605                         pr_err("Unable to start - perhaps the PF Driver isn't up yet\n");
3606                         goto err_setup_reset;
3607                 }
3608         }
3609
3610         /* disallow open during test */
3611         if (test_bit(__IXGBEVF_TESTING, &adapter->state))
3612                 return -EBUSY;
3613
3614         netif_carrier_off(netdev);
3615
3616         /* allocate transmit descriptors */
3617         err = ixgbevf_setup_all_tx_resources(adapter);
3618         if (err)
3619                 goto err_setup_tx;
3620
3621         /* allocate receive descriptors */
3622         err = ixgbevf_setup_all_rx_resources(adapter);
3623         if (err)
3624                 goto err_setup_rx;
3625
3626         ixgbevf_configure(adapter);
3627
3628         err = ixgbevf_request_irq(adapter);
3629         if (err)
3630                 goto err_req_irq;
3631
3632         /* Notify the stack of the actual queue counts. */
3633         err = netif_set_real_num_tx_queues(netdev, adapter->num_tx_queues);
3634         if (err)
3635                 goto err_set_queues;
3636
3637         err = netif_set_real_num_rx_queues(netdev, adapter->num_rx_queues);
3638         if (err)
3639                 goto err_set_queues;
3640
3641         ixgbevf_up_complete(adapter);
3642
3643         return 0;
3644
3645 err_set_queues:
3646         ixgbevf_free_irq(adapter);
3647 err_req_irq:
3648         ixgbevf_free_all_rx_resources(adapter);
3649 err_setup_rx:
3650         ixgbevf_free_all_tx_resources(adapter);
3651 err_setup_tx:
3652         ixgbevf_reset(adapter);
3653 err_setup_reset:
3654
3655         return err;
3656 }
3657
3658 /**
3659  * ixgbevf_close_suspend - actions necessary to both suspend and close flows
3660  * @adapter: the private adapter struct
3661  *
3662  * This function should contain the necessary work common to both suspending
3663  * and closing of the device.
3664  */
3665 static void ixgbevf_close_suspend(struct ixgbevf_adapter *adapter)
3666 {
3667         ixgbevf_down(adapter);
3668         ixgbevf_free_irq(adapter);
3669         ixgbevf_free_all_tx_resources(adapter);
3670         ixgbevf_free_all_rx_resources(adapter);
3671 }
3672
3673 /**
3674  * ixgbevf_close - Disables a network interface
3675  * @netdev: network interface device structure
3676  *
3677  * Returns 0, this is not allowed to fail
3678  *
3679  * The close entry point is called when an interface is de-activated
3680  * by the OS.  The hardware is still under the drivers control, but
3681  * needs to be disabled.  A global MAC reset is issued to stop the
3682  * hardware, and all transmit and receive resources are freed.
3683  **/
3684 int ixgbevf_close(struct net_device *netdev)
3685 {
3686         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3687
3688         if (netif_device_present(netdev))
3689                 ixgbevf_close_suspend(adapter);
3690
3691         return 0;
3692 }
3693
3694 static void ixgbevf_queue_reset_subtask(struct ixgbevf_adapter *adapter)
3695 {
3696         struct net_device *dev = adapter->netdev;
3697
3698         if (!test_and_clear_bit(__IXGBEVF_QUEUE_RESET_REQUESTED,
3699                                 &adapter->state))
3700                 return;
3701
3702         /* if interface is down do nothing */
3703         if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
3704             test_bit(__IXGBEVF_RESETTING, &adapter->state))
3705                 return;
3706
3707         /* Hardware has to reinitialize queues and interrupts to
3708          * match packet buffer alignment. Unfortunately, the
3709          * hardware is not flexible enough to do this dynamically.
3710          */
3711         rtnl_lock();
3712
3713         if (netif_running(dev))
3714                 ixgbevf_close(dev);
3715
3716         ixgbevf_clear_interrupt_scheme(adapter);
3717         ixgbevf_init_interrupt_scheme(adapter);
3718
3719         if (netif_running(dev))
3720                 ixgbevf_open(dev);
3721
3722         rtnl_unlock();
3723 }
3724
3725 static void ixgbevf_tx_ctxtdesc(struct ixgbevf_ring *tx_ring,
3726                                 u32 vlan_macip_lens, u32 fceof_saidx,
3727                                 u32 type_tucmd, u32 mss_l4len_idx)
3728 {
3729         struct ixgbe_adv_tx_context_desc *context_desc;
3730         u16 i = tx_ring->next_to_use;
3731
3732         context_desc = IXGBEVF_TX_CTXTDESC(tx_ring, i);
3733
3734         i++;
3735         tx_ring->next_to_use = (i < tx_ring->count) ? i : 0;
3736
3737         /* set bits to identify this as an advanced context descriptor */
3738         type_tucmd |= IXGBE_TXD_CMD_DEXT | IXGBE_ADVTXD_DTYP_CTXT;
3739
3740         context_desc->vlan_macip_lens   = cpu_to_le32(vlan_macip_lens);
3741         context_desc->fceof_saidx       = cpu_to_le32(fceof_saidx);
3742         context_desc->type_tucmd_mlhl   = cpu_to_le32(type_tucmd);
3743         context_desc->mss_l4len_idx     = cpu_to_le32(mss_l4len_idx);
3744 }
3745
3746 static int ixgbevf_tso(struct ixgbevf_ring *tx_ring,
3747                        struct ixgbevf_tx_buffer *first,
3748                        u8 *hdr_len,
3749                        struct ixgbevf_ipsec_tx_data *itd)
3750 {
3751         u32 vlan_macip_lens, type_tucmd, mss_l4len_idx;
3752         struct sk_buff *skb = first->skb;
3753         union {
3754                 struct iphdr *v4;
3755                 struct ipv6hdr *v6;
3756                 unsigned char *hdr;
3757         } ip;
3758         union {
3759                 struct tcphdr *tcp;
3760                 unsigned char *hdr;
3761         } l4;
3762         u32 paylen, l4_offset;
3763         u32 fceof_saidx = 0;
3764         int err;
3765
3766         if (skb->ip_summed != CHECKSUM_PARTIAL)
3767                 return 0;
3768
3769         if (!skb_is_gso(skb))
3770                 return 0;
3771
3772         err = skb_cow_head(skb, 0);
3773         if (err < 0)
3774                 return err;
3775
3776         if (eth_p_mpls(first->protocol))
3777                 ip.hdr = skb_inner_network_header(skb);
3778         else
3779                 ip.hdr = skb_network_header(skb);
3780         l4.hdr = skb_checksum_start(skb);
3781
3782         /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
3783         type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP;
3784
3785         /* initialize outer IP header fields */
3786         if (ip.v4->version == 4) {
3787                 unsigned char *csum_start = skb_checksum_start(skb);
3788                 unsigned char *trans_start = ip.hdr + (ip.v4->ihl * 4);
3789                 int len = csum_start - trans_start;
3790
3791                 /* IP header will have to cancel out any data that
3792                  * is not a part of the outer IP header, so set to
3793                  * a reverse csum if needed, else init check to 0.
3794                  */
3795                 ip.v4->check = (skb_shinfo(skb)->gso_type & SKB_GSO_PARTIAL) ?
3796                                            csum_fold(csum_partial(trans_start,
3797                                                                   len, 0)) : 0;
3798                 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
3799
3800                 ip.v4->tot_len = 0;
3801                 first->tx_flags |= IXGBE_TX_FLAGS_TSO |
3802                                    IXGBE_TX_FLAGS_CSUM |
3803                                    IXGBE_TX_FLAGS_IPV4;
3804         } else {
3805                 ip.v6->payload_len = 0;
3806                 first->tx_flags |= IXGBE_TX_FLAGS_TSO |
3807                                    IXGBE_TX_FLAGS_CSUM;
3808         }
3809
3810         /* determine offset of inner transport header */
3811         l4_offset = l4.hdr - skb->data;
3812
3813         /* compute length of segmentation header */
3814         *hdr_len = (l4.tcp->doff * 4) + l4_offset;
3815
3816         /* remove payload length from inner checksum */
3817         paylen = skb->len - l4_offset;
3818         csum_replace_by_diff(&l4.tcp->check, (__force __wsum)htonl(paylen));
3819
3820         /* update gso size and bytecount with header size */
3821         first->gso_segs = skb_shinfo(skb)->gso_segs;
3822         first->bytecount += (first->gso_segs - 1) * *hdr_len;
3823
3824         /* mss_l4len_id: use 1 as index for TSO */
3825         mss_l4len_idx = (*hdr_len - l4_offset) << IXGBE_ADVTXD_L4LEN_SHIFT;
3826         mss_l4len_idx |= skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT;
3827         mss_l4len_idx |= (1u << IXGBE_ADVTXD_IDX_SHIFT);
3828
3829         fceof_saidx |= itd->pfsa;
3830         type_tucmd |= itd->flags | itd->trailer_len;
3831
3832         /* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */
3833         vlan_macip_lens = l4.hdr - ip.hdr;
3834         vlan_macip_lens |= (ip.hdr - skb->data) << IXGBE_ADVTXD_MACLEN_SHIFT;
3835         vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
3836
3837         ixgbevf_tx_ctxtdesc(tx_ring, vlan_macip_lens, fceof_saidx, type_tucmd,
3838                             mss_l4len_idx);
3839
3840         return 1;
3841 }
3842
3843 static void ixgbevf_tx_csum(struct ixgbevf_ring *tx_ring,
3844                             struct ixgbevf_tx_buffer *first,
3845                             struct ixgbevf_ipsec_tx_data *itd)
3846 {
3847         struct sk_buff *skb = first->skb;
3848         u32 vlan_macip_lens = 0;
3849         u32 fceof_saidx = 0;
3850         u32 type_tucmd = 0;
3851
3852         if (skb->ip_summed != CHECKSUM_PARTIAL)
3853                 goto no_csum;
3854
3855         switch (skb->csum_offset) {
3856         case offsetof(struct tcphdr, check):
3857                 type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP;
3858                 fallthrough;
3859         case offsetof(struct udphdr, check):
3860                 break;
3861         case offsetof(struct sctphdr, checksum):
3862                 /* validate that this is actually an SCTP request */
3863                 if (skb_csum_is_sctp(skb)) {
3864                         type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_SCTP;
3865                         break;
3866                 }
3867                 fallthrough;
3868         default:
3869                 skb_checksum_help(skb);
3870                 goto no_csum;
3871         }
3872
3873         if (first->protocol == htons(ETH_P_IP))
3874                 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
3875
3876         /* update TX checksum flag */
3877         first->tx_flags |= IXGBE_TX_FLAGS_CSUM;
3878         vlan_macip_lens = skb_checksum_start_offset(skb) -
3879                           skb_network_offset(skb);
3880 no_csum:
3881         /* vlan_macip_lens: MACLEN, VLAN tag */
3882         vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
3883         vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
3884
3885         fceof_saidx |= itd->pfsa;
3886         type_tucmd |= itd->flags | itd->trailer_len;
3887
3888         ixgbevf_tx_ctxtdesc(tx_ring, vlan_macip_lens,
3889                             fceof_saidx, type_tucmd, 0);
3890 }
3891
3892 static __le32 ixgbevf_tx_cmd_type(u32 tx_flags)
3893 {
3894         /* set type for advanced descriptor with frame checksum insertion */
3895         __le32 cmd_type = cpu_to_le32(IXGBE_ADVTXD_DTYP_DATA |
3896                                       IXGBE_ADVTXD_DCMD_IFCS |
3897                                       IXGBE_ADVTXD_DCMD_DEXT);
3898
3899         /* set HW VLAN bit if VLAN is present */
3900         if (tx_flags & IXGBE_TX_FLAGS_VLAN)
3901                 cmd_type |= cpu_to_le32(IXGBE_ADVTXD_DCMD_VLE);
3902
3903         /* set segmentation enable bits for TSO/FSO */
3904         if (tx_flags & IXGBE_TX_FLAGS_TSO)
3905                 cmd_type |= cpu_to_le32(IXGBE_ADVTXD_DCMD_TSE);
3906
3907         return cmd_type;
3908 }
3909
3910 static void ixgbevf_tx_olinfo_status(union ixgbe_adv_tx_desc *tx_desc,
3911                                      u32 tx_flags, unsigned int paylen)
3912 {
3913         __le32 olinfo_status = cpu_to_le32(paylen << IXGBE_ADVTXD_PAYLEN_SHIFT);
3914
3915         /* enable L4 checksum for TSO and TX checksum offload */
3916         if (tx_flags & IXGBE_TX_FLAGS_CSUM)
3917                 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_POPTS_TXSM);
3918
3919         /* enble IPv4 checksum for TSO */
3920         if (tx_flags & IXGBE_TX_FLAGS_IPV4)
3921                 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_POPTS_IXSM);
3922
3923         /* enable IPsec */
3924         if (tx_flags & IXGBE_TX_FLAGS_IPSEC)
3925                 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_POPTS_IPSEC);
3926
3927         /* use index 1 context for TSO/FSO/FCOE/IPSEC */
3928         if (tx_flags & (IXGBE_TX_FLAGS_TSO | IXGBE_TX_FLAGS_IPSEC))
3929                 olinfo_status |= cpu_to_le32(1u << IXGBE_ADVTXD_IDX_SHIFT);
3930
3931         /* Check Context must be set if Tx switch is enabled, which it
3932          * always is for case where virtual functions are running
3933          */
3934         olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_CC);
3935
3936         tx_desc->read.olinfo_status = olinfo_status;
3937 }
3938
3939 static void ixgbevf_tx_map(struct ixgbevf_ring *tx_ring,
3940                            struct ixgbevf_tx_buffer *first,
3941                            const u8 hdr_len)
3942 {
3943         struct sk_buff *skb = first->skb;
3944         struct ixgbevf_tx_buffer *tx_buffer;
3945         union ixgbe_adv_tx_desc *tx_desc;
3946         skb_frag_t *frag;
3947         dma_addr_t dma;
3948         unsigned int data_len, size;
3949         u32 tx_flags = first->tx_flags;
3950         __le32 cmd_type = ixgbevf_tx_cmd_type(tx_flags);
3951         u16 i = tx_ring->next_to_use;
3952
3953         tx_desc = IXGBEVF_TX_DESC(tx_ring, i);
3954
3955         ixgbevf_tx_olinfo_status(tx_desc, tx_flags, skb->len - hdr_len);
3956
3957         size = skb_headlen(skb);
3958         data_len = skb->data_len;
3959
3960         dma = dma_map_single(tx_ring->dev, skb->data, size, DMA_TO_DEVICE);
3961
3962         tx_buffer = first;
3963
3964         for (frag = &skb_shinfo(skb)->frags[0];; frag++) {
3965                 if (dma_mapping_error(tx_ring->dev, dma))
3966                         goto dma_error;
3967
3968                 /* record length, and DMA address */
3969                 dma_unmap_len_set(tx_buffer, len, size);
3970                 dma_unmap_addr_set(tx_buffer, dma, dma);
3971
3972                 tx_desc->read.buffer_addr = cpu_to_le64(dma);
3973
3974                 while (unlikely(size > IXGBE_MAX_DATA_PER_TXD)) {
3975                         tx_desc->read.cmd_type_len =
3976                                 cmd_type | cpu_to_le32(IXGBE_MAX_DATA_PER_TXD);
3977
3978                         i++;
3979                         tx_desc++;
3980                         if (i == tx_ring->count) {
3981                                 tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);
3982                                 i = 0;
3983                         }
3984                         tx_desc->read.olinfo_status = 0;
3985
3986                         dma += IXGBE_MAX_DATA_PER_TXD;
3987                         size -= IXGBE_MAX_DATA_PER_TXD;
3988
3989                         tx_desc->read.buffer_addr = cpu_to_le64(dma);
3990                 }
3991
3992                 if (likely(!data_len))
3993                         break;
3994
3995                 tx_desc->read.cmd_type_len = cmd_type | cpu_to_le32(size);
3996
3997                 i++;
3998                 tx_desc++;
3999                 if (i == tx_ring->count) {
4000                         tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);
4001                         i = 0;
4002                 }
4003                 tx_desc->read.olinfo_status = 0;
4004
4005                 size = skb_frag_size(frag);
4006                 data_len -= size;
4007
4008                 dma = skb_frag_dma_map(tx_ring->dev, frag, 0, size,
4009                                        DMA_TO_DEVICE);
4010
4011                 tx_buffer = &tx_ring->tx_buffer_info[i];
4012         }
4013
4014         /* write last descriptor with RS and EOP bits */
4015         cmd_type |= cpu_to_le32(size) | cpu_to_le32(IXGBE_TXD_CMD);
4016         tx_desc->read.cmd_type_len = cmd_type;
4017
4018         /* set the timestamp */
4019         first->time_stamp = jiffies;
4020
4021         skb_tx_timestamp(skb);
4022
4023         /* Force memory writes to complete before letting h/w know there
4024          * are new descriptors to fetch.  (Only applicable for weak-ordered
4025          * memory model archs, such as IA-64).
4026          *
4027          * We also need this memory barrier (wmb) to make certain all of the
4028          * status bits have been updated before next_to_watch is written.
4029          */
4030         wmb();
4031
4032         /* set next_to_watch value indicating a packet is present */
4033         first->next_to_watch = tx_desc;
4034
4035         i++;
4036         if (i == tx_ring->count)
4037                 i = 0;
4038
4039         tx_ring->next_to_use = i;
4040
4041         /* notify HW of packet */
4042         ixgbevf_write_tail(tx_ring, i);
4043
4044         return;
4045 dma_error:
4046         dev_err(tx_ring->dev, "TX DMA map failed\n");
4047         tx_buffer = &tx_ring->tx_buffer_info[i];
4048
4049         /* clear dma mappings for failed tx_buffer_info map */
4050         while (tx_buffer != first) {
4051                 if (dma_unmap_len(tx_buffer, len))
4052                         dma_unmap_page(tx_ring->dev,
4053                                        dma_unmap_addr(tx_buffer, dma),
4054                                        dma_unmap_len(tx_buffer, len),
4055                                        DMA_TO_DEVICE);
4056                 dma_unmap_len_set(tx_buffer, len, 0);
4057
4058                 if (i-- == 0)
4059                         i += tx_ring->count;
4060                 tx_buffer = &tx_ring->tx_buffer_info[i];
4061         }
4062
4063         if (dma_unmap_len(tx_buffer, len))
4064                 dma_unmap_single(tx_ring->dev,
4065                                  dma_unmap_addr(tx_buffer, dma),
4066                                  dma_unmap_len(tx_buffer, len),
4067                                  DMA_TO_DEVICE);
4068         dma_unmap_len_set(tx_buffer, len, 0);
4069
4070         dev_kfree_skb_any(tx_buffer->skb);
4071         tx_buffer->skb = NULL;
4072
4073         tx_ring->next_to_use = i;
4074 }
4075
4076 static int __ixgbevf_maybe_stop_tx(struct ixgbevf_ring *tx_ring, int size)
4077 {
4078         netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
4079         /* Herbert's original patch had:
4080          *  smp_mb__after_netif_stop_queue();
4081          * but since that doesn't exist yet, just open code it.
4082          */
4083         smp_mb();
4084
4085         /* We need to check again in a case another CPU has just
4086          * made room available.
4087          */
4088         if (likely(ixgbevf_desc_unused(tx_ring) < size))
4089                 return -EBUSY;
4090
4091         /* A reprieve! - use start_queue because it doesn't call schedule */
4092         netif_start_subqueue(tx_ring->netdev, tx_ring->queue_index);
4093         ++tx_ring->tx_stats.restart_queue;
4094
4095         return 0;
4096 }
4097
4098 static int ixgbevf_maybe_stop_tx(struct ixgbevf_ring *tx_ring, int size)
4099 {
4100         if (likely(ixgbevf_desc_unused(tx_ring) >= size))
4101                 return 0;
4102         return __ixgbevf_maybe_stop_tx(tx_ring, size);
4103 }
4104
4105 static int ixgbevf_xmit_frame_ring(struct sk_buff *skb,
4106                                    struct ixgbevf_ring *tx_ring)
4107 {
4108         struct ixgbevf_tx_buffer *first;
4109         int tso;
4110         u32 tx_flags = 0;
4111         u16 count = TXD_USE_COUNT(skb_headlen(skb));
4112         struct ixgbevf_ipsec_tx_data ipsec_tx = { 0 };
4113 #if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD
4114         unsigned short f;
4115 #endif
4116         u8 hdr_len = 0;
4117         u8 *dst_mac = skb_header_pointer(skb, 0, 0, NULL);
4118
4119         if (!dst_mac || is_link_local_ether_addr(dst_mac)) {
4120                 dev_kfree_skb_any(skb);
4121                 return NETDEV_TX_OK;
4122         }
4123
4124         /* need: 1 descriptor per page * PAGE_SIZE/IXGBE_MAX_DATA_PER_TXD,
4125          *       + 1 desc for skb_headlen/IXGBE_MAX_DATA_PER_TXD,
4126          *       + 2 desc gap to keep tail from touching head,
4127          *       + 1 desc for context descriptor,
4128          * otherwise try next time
4129          */
4130 #if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD
4131         for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) {
4132                 skb_frag_t *frag = &skb_shinfo(skb)->frags[f];
4133
4134                 count += TXD_USE_COUNT(skb_frag_size(frag));
4135         }
4136 #else
4137         count += skb_shinfo(skb)->nr_frags;
4138 #endif
4139         if (ixgbevf_maybe_stop_tx(tx_ring, count + 3)) {
4140                 tx_ring->tx_stats.tx_busy++;
4141                 return NETDEV_TX_BUSY;
4142         }
4143
4144         /* record the location of the first descriptor for this packet */
4145         first = &tx_ring->tx_buffer_info[tx_ring->next_to_use];
4146         first->skb = skb;
4147         first->bytecount = skb->len;
4148         first->gso_segs = 1;
4149
4150         if (skb_vlan_tag_present(skb)) {
4151                 tx_flags |= skb_vlan_tag_get(skb);
4152                 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
4153                 tx_flags |= IXGBE_TX_FLAGS_VLAN;
4154         }
4155
4156         /* record initial flags and protocol */
4157         first->tx_flags = tx_flags;
4158         first->protocol = vlan_get_protocol(skb);
4159
4160 #ifdef CONFIG_IXGBEVF_IPSEC
4161         if (xfrm_offload(skb) && !ixgbevf_ipsec_tx(tx_ring, first, &ipsec_tx))
4162                 goto out_drop;
4163 #endif
4164         tso = ixgbevf_tso(tx_ring, first, &hdr_len, &ipsec_tx);
4165         if (tso < 0)
4166                 goto out_drop;
4167         else if (!tso)
4168                 ixgbevf_tx_csum(tx_ring, first, &ipsec_tx);
4169
4170         ixgbevf_tx_map(tx_ring, first, hdr_len);
4171
4172         ixgbevf_maybe_stop_tx(tx_ring, DESC_NEEDED);
4173
4174         return NETDEV_TX_OK;
4175
4176 out_drop:
4177         dev_kfree_skb_any(first->skb);
4178         first->skb = NULL;
4179
4180         return NETDEV_TX_OK;
4181 }
4182
4183 static netdev_tx_t ixgbevf_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
4184 {
4185         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4186         struct ixgbevf_ring *tx_ring;
4187
4188         if (skb->len <= 0) {
4189                 dev_kfree_skb_any(skb);
4190                 return NETDEV_TX_OK;
4191         }
4192
4193         /* The minimum packet size for olinfo paylen is 17 so pad the skb
4194          * in order to meet this minimum size requirement.
4195          */
4196         if (skb->len < 17) {
4197                 if (skb_padto(skb, 17))
4198                         return NETDEV_TX_OK;
4199                 skb->len = 17;
4200         }
4201
4202         tx_ring = adapter->tx_ring[skb->queue_mapping];
4203         return ixgbevf_xmit_frame_ring(skb, tx_ring);
4204 }
4205
4206 /**
4207  * ixgbevf_set_mac - Change the Ethernet Address of the NIC
4208  * @netdev: network interface device structure
4209  * @p: pointer to an address structure
4210  *
4211  * Returns 0 on success, negative on failure
4212  **/
4213 static int ixgbevf_set_mac(struct net_device *netdev, void *p)
4214 {
4215         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4216         struct ixgbe_hw *hw = &adapter->hw;
4217         struct sockaddr *addr = p;
4218         int err;
4219
4220         if (!is_valid_ether_addr(addr->sa_data))
4221                 return -EADDRNOTAVAIL;
4222
4223         spin_lock_bh(&adapter->mbx_lock);
4224
4225         err = hw->mac.ops.set_rar(hw, 0, addr->sa_data, 0);
4226
4227         spin_unlock_bh(&adapter->mbx_lock);
4228
4229         if (err)
4230                 return -EPERM;
4231
4232         ether_addr_copy(hw->mac.addr, addr->sa_data);
4233         ether_addr_copy(hw->mac.perm_addr, addr->sa_data);
4234         eth_hw_addr_set(netdev, addr->sa_data);
4235
4236         return 0;
4237 }
4238
4239 /**
4240  * ixgbevf_change_mtu - Change the Maximum Transfer Unit
4241  * @netdev: network interface device structure
4242  * @new_mtu: new value for maximum frame size
4243  *
4244  * Returns 0 on success, negative on failure
4245  **/
4246 static int ixgbevf_change_mtu(struct net_device *netdev, int new_mtu)
4247 {
4248         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4249         struct ixgbe_hw *hw = &adapter->hw;
4250         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
4251         int ret;
4252
4253         /* prevent MTU being changed to a size unsupported by XDP */
4254         if (adapter->xdp_prog) {
4255                 dev_warn(&adapter->pdev->dev, "MTU cannot be changed while XDP program is loaded\n");
4256                 return -EPERM;
4257         }
4258
4259         spin_lock_bh(&adapter->mbx_lock);
4260         /* notify the PF of our intent to use this size of frame */
4261         ret = hw->mac.ops.set_rlpml(hw, max_frame);
4262         spin_unlock_bh(&adapter->mbx_lock);
4263         if (ret)
4264                 return -EINVAL;
4265
4266         hw_dbg(hw, "changing MTU from %d to %d\n",
4267                netdev->mtu, new_mtu);
4268
4269         /* must set new MTU before calling down or up */
4270         netdev->mtu = new_mtu;
4271
4272         if (netif_running(netdev))
4273                 ixgbevf_reinit_locked(adapter);
4274
4275         return 0;
4276 }
4277
4278 static int __maybe_unused ixgbevf_suspend(struct device *dev_d)
4279 {
4280         struct net_device *netdev = dev_get_drvdata(dev_d);
4281         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4282
4283         rtnl_lock();
4284         netif_device_detach(netdev);
4285
4286         if (netif_running(netdev))
4287                 ixgbevf_close_suspend(adapter);
4288
4289         ixgbevf_clear_interrupt_scheme(adapter);
4290         rtnl_unlock();
4291
4292         return 0;
4293 }
4294
4295 static int __maybe_unused ixgbevf_resume(struct device *dev_d)
4296 {
4297         struct pci_dev *pdev = to_pci_dev(dev_d);
4298         struct net_device *netdev = pci_get_drvdata(pdev);
4299         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4300         u32 err;
4301
4302         adapter->hw.hw_addr = adapter->io_addr;
4303         smp_mb__before_atomic();
4304         clear_bit(__IXGBEVF_DISABLED, &adapter->state);
4305         pci_set_master(pdev);
4306
4307         ixgbevf_reset(adapter);
4308
4309         rtnl_lock();
4310         err = ixgbevf_init_interrupt_scheme(adapter);
4311         if (!err && netif_running(netdev))
4312                 err = ixgbevf_open(netdev);
4313         rtnl_unlock();
4314         if (err)
4315                 return err;
4316
4317         netif_device_attach(netdev);
4318
4319         return err;
4320 }
4321
4322 static void ixgbevf_shutdown(struct pci_dev *pdev)
4323 {
4324         ixgbevf_suspend(&pdev->dev);
4325 }
4326
4327 static void ixgbevf_get_tx_ring_stats(struct rtnl_link_stats64 *stats,
4328                                       const struct ixgbevf_ring *ring)
4329 {
4330         u64 bytes, packets;
4331         unsigned int start;
4332
4333         if (ring) {
4334                 do {
4335                         start = u64_stats_fetch_begin_irq(&ring->syncp);
4336                         bytes = ring->stats.bytes;
4337                         packets = ring->stats.packets;
4338                 } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
4339                 stats->tx_bytes += bytes;
4340                 stats->tx_packets += packets;
4341         }
4342 }
4343
4344 static void ixgbevf_get_stats(struct net_device *netdev,
4345                               struct rtnl_link_stats64 *stats)
4346 {
4347         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4348         unsigned int start;
4349         u64 bytes, packets;
4350         const struct ixgbevf_ring *ring;
4351         int i;
4352
4353         ixgbevf_update_stats(adapter);
4354
4355         stats->multicast = adapter->stats.vfmprc - adapter->stats.base_vfmprc;
4356
4357         rcu_read_lock();
4358         for (i = 0; i < adapter->num_rx_queues; i++) {
4359                 ring = adapter->rx_ring[i];
4360                 do {
4361                         start = u64_stats_fetch_begin_irq(&ring->syncp);
4362                         bytes = ring->stats.bytes;
4363                         packets = ring->stats.packets;
4364                 } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
4365                 stats->rx_bytes += bytes;
4366                 stats->rx_packets += packets;
4367         }
4368
4369         for (i = 0; i < adapter->num_tx_queues; i++) {
4370                 ring = adapter->tx_ring[i];
4371                 ixgbevf_get_tx_ring_stats(stats, ring);
4372         }
4373
4374         for (i = 0; i < adapter->num_xdp_queues; i++) {
4375                 ring = adapter->xdp_ring[i];
4376                 ixgbevf_get_tx_ring_stats(stats, ring);
4377         }
4378         rcu_read_unlock();
4379 }
4380
4381 #define IXGBEVF_MAX_MAC_HDR_LEN         127
4382 #define IXGBEVF_MAX_NETWORK_HDR_LEN     511
4383
4384 static netdev_features_t
4385 ixgbevf_features_check(struct sk_buff *skb, struct net_device *dev,
4386                        netdev_features_t features)
4387 {
4388         unsigned int network_hdr_len, mac_hdr_len;
4389
4390         /* Make certain the headers can be described by a context descriptor */
4391         mac_hdr_len = skb_network_header(skb) - skb->data;
4392         if (unlikely(mac_hdr_len > IXGBEVF_MAX_MAC_HDR_LEN))
4393                 return features & ~(NETIF_F_HW_CSUM |
4394                                     NETIF_F_SCTP_CRC |
4395                                     NETIF_F_HW_VLAN_CTAG_TX |
4396                                     NETIF_F_TSO |
4397                                     NETIF_F_TSO6);
4398
4399         network_hdr_len = skb_checksum_start(skb) - skb_network_header(skb);
4400         if (unlikely(network_hdr_len >  IXGBEVF_MAX_NETWORK_HDR_LEN))
4401                 return features & ~(NETIF_F_HW_CSUM |
4402                                     NETIF_F_SCTP_CRC |
4403                                     NETIF_F_TSO |
4404                                     NETIF_F_TSO6);
4405
4406         /* We can only support IPV4 TSO in tunnels if we can mangle the
4407          * inner IP ID field, so strip TSO if MANGLEID is not supported.
4408          */
4409         if (skb->encapsulation && !(features & NETIF_F_TSO_MANGLEID))
4410                 features &= ~NETIF_F_TSO;
4411
4412         return features;
4413 }
4414
4415 static int ixgbevf_xdp_setup(struct net_device *dev, struct bpf_prog *prog)
4416 {
4417         int i, frame_size = dev->mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
4418         struct ixgbevf_adapter *adapter = netdev_priv(dev);
4419         struct bpf_prog *old_prog;
4420
4421         /* verify ixgbevf ring attributes are sufficient for XDP */
4422         for (i = 0; i < adapter->num_rx_queues; i++) {
4423                 struct ixgbevf_ring *ring = adapter->rx_ring[i];
4424
4425                 if (frame_size > ixgbevf_rx_bufsz(ring))
4426                         return -EINVAL;
4427         }
4428
4429         old_prog = xchg(&adapter->xdp_prog, prog);
4430
4431         /* If transitioning XDP modes reconfigure rings */
4432         if (!!prog != !!old_prog) {
4433                 /* Hardware has to reinitialize queues and interrupts to
4434                  * match packet buffer alignment. Unfortunately, the
4435                  * hardware is not flexible enough to do this dynamically.
4436                  */
4437                 if (netif_running(dev))
4438                         ixgbevf_close(dev);
4439
4440                 ixgbevf_clear_interrupt_scheme(adapter);
4441                 ixgbevf_init_interrupt_scheme(adapter);
4442
4443                 if (netif_running(dev))
4444                         ixgbevf_open(dev);
4445         } else {
4446                 for (i = 0; i < adapter->num_rx_queues; i++)
4447                         xchg(&adapter->rx_ring[i]->xdp_prog, adapter->xdp_prog);
4448         }
4449
4450         if (old_prog)
4451                 bpf_prog_put(old_prog);
4452
4453         return 0;
4454 }
4455
4456 static int ixgbevf_xdp(struct net_device *dev, struct netdev_bpf *xdp)
4457 {
4458         switch (xdp->command) {
4459         case XDP_SETUP_PROG:
4460                 return ixgbevf_xdp_setup(dev, xdp->prog);
4461         default:
4462                 return -EINVAL;
4463         }
4464 }
4465
4466 static const struct net_device_ops ixgbevf_netdev_ops = {
4467         .ndo_open               = ixgbevf_open,
4468         .ndo_stop               = ixgbevf_close,
4469         .ndo_start_xmit         = ixgbevf_xmit_frame,
4470         .ndo_set_rx_mode        = ixgbevf_set_rx_mode,
4471         .ndo_get_stats64        = ixgbevf_get_stats,
4472         .ndo_validate_addr      = eth_validate_addr,
4473         .ndo_set_mac_address    = ixgbevf_set_mac,
4474         .ndo_change_mtu         = ixgbevf_change_mtu,
4475         .ndo_tx_timeout         = ixgbevf_tx_timeout,
4476         .ndo_vlan_rx_add_vid    = ixgbevf_vlan_rx_add_vid,
4477         .ndo_vlan_rx_kill_vid   = ixgbevf_vlan_rx_kill_vid,
4478         .ndo_features_check     = ixgbevf_features_check,
4479         .ndo_bpf                = ixgbevf_xdp,
4480 };
4481
4482 static void ixgbevf_assign_netdev_ops(struct net_device *dev)
4483 {
4484         dev->netdev_ops = &ixgbevf_netdev_ops;
4485         ixgbevf_set_ethtool_ops(dev);
4486         dev->watchdog_timeo = 5 * HZ;
4487 }
4488
4489 /**
4490  * ixgbevf_probe - Device Initialization Routine
4491  * @pdev: PCI device information struct
4492  * @ent: entry in ixgbevf_pci_tbl
4493  *
4494  * Returns 0 on success, negative on failure
4495  *
4496  * ixgbevf_probe initializes an adapter identified by a pci_dev structure.
4497  * The OS initialization, configuring of the adapter private structure,
4498  * and a hardware reset occur.
4499  **/
4500 static int ixgbevf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
4501 {
4502         struct net_device *netdev;
4503         struct ixgbevf_adapter *adapter = NULL;
4504         struct ixgbe_hw *hw = NULL;
4505         const struct ixgbevf_info *ii = ixgbevf_info_tbl[ent->driver_data];
4506         int err, pci_using_dac;
4507         bool disable_dev = false;
4508
4509         err = pci_enable_device(pdev);
4510         if (err)
4511                 return err;
4512
4513         if (!dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) {
4514                 pci_using_dac = 1;
4515         } else {
4516                 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
4517                 if (err) {
4518                         dev_err(&pdev->dev, "No usable DMA configuration, aborting\n");
4519                         goto err_dma;
4520                 }
4521                 pci_using_dac = 0;
4522         }
4523
4524         err = pci_request_regions(pdev, ixgbevf_driver_name);
4525         if (err) {
4526                 dev_err(&pdev->dev, "pci_request_regions failed 0x%x\n", err);
4527                 goto err_pci_reg;
4528         }
4529
4530         pci_set_master(pdev);
4531
4532         netdev = alloc_etherdev_mq(sizeof(struct ixgbevf_adapter),
4533                                    MAX_TX_QUEUES);
4534         if (!netdev) {
4535                 err = -ENOMEM;
4536                 goto err_alloc_etherdev;
4537         }
4538
4539         SET_NETDEV_DEV(netdev, &pdev->dev);
4540
4541         adapter = netdev_priv(netdev);
4542
4543         adapter->netdev = netdev;
4544         adapter->pdev = pdev;
4545         hw = &adapter->hw;
4546         hw->back = adapter;
4547         adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
4548
4549         /* call save state here in standalone driver because it relies on
4550          * adapter struct to exist, and needs to call netdev_priv
4551          */
4552         pci_save_state(pdev);
4553
4554         hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
4555                               pci_resource_len(pdev, 0));
4556         adapter->io_addr = hw->hw_addr;
4557         if (!hw->hw_addr) {
4558                 err = -EIO;
4559                 goto err_ioremap;
4560         }
4561
4562         ixgbevf_assign_netdev_ops(netdev);
4563
4564         /* Setup HW API */
4565         memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
4566         hw->mac.type  = ii->mac;
4567
4568         memcpy(&hw->mbx.ops, &ixgbevf_mbx_ops,
4569                sizeof(struct ixgbe_mbx_operations));
4570
4571         /* setup the private structure */
4572         err = ixgbevf_sw_init(adapter);
4573         if (err)
4574                 goto err_sw_init;
4575
4576         /* The HW MAC address was set and/or determined in sw_init */
4577         if (!is_valid_ether_addr(netdev->dev_addr)) {
4578                 pr_err("invalid MAC address\n");
4579                 err = -EIO;
4580                 goto err_sw_init;
4581         }
4582
4583         netdev->hw_features = NETIF_F_SG |
4584                               NETIF_F_TSO |
4585                               NETIF_F_TSO6 |
4586                               NETIF_F_RXCSUM |
4587                               NETIF_F_HW_CSUM |
4588                               NETIF_F_SCTP_CRC;
4589
4590 #define IXGBEVF_GSO_PARTIAL_FEATURES (NETIF_F_GSO_GRE | \
4591                                       NETIF_F_GSO_GRE_CSUM | \
4592                                       NETIF_F_GSO_IPXIP4 | \
4593                                       NETIF_F_GSO_IPXIP6 | \
4594                                       NETIF_F_GSO_UDP_TUNNEL | \
4595                                       NETIF_F_GSO_UDP_TUNNEL_CSUM)
4596
4597         netdev->gso_partial_features = IXGBEVF_GSO_PARTIAL_FEATURES;
4598         netdev->hw_features |= NETIF_F_GSO_PARTIAL |
4599                                IXGBEVF_GSO_PARTIAL_FEATURES;
4600
4601         netdev->features = netdev->hw_features;
4602
4603         if (pci_using_dac)
4604                 netdev->features |= NETIF_F_HIGHDMA;
4605
4606         netdev->vlan_features |= netdev->features | NETIF_F_TSO_MANGLEID;
4607         netdev->mpls_features |= NETIF_F_SG |
4608                                  NETIF_F_TSO |
4609                                  NETIF_F_TSO6 |
4610                                  NETIF_F_HW_CSUM;
4611         netdev->mpls_features |= IXGBEVF_GSO_PARTIAL_FEATURES;
4612         netdev->hw_enc_features |= netdev->vlan_features;
4613
4614         /* set this bit last since it cannot be part of vlan_features */
4615         netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER |
4616                             NETIF_F_HW_VLAN_CTAG_RX |
4617                             NETIF_F_HW_VLAN_CTAG_TX;
4618
4619         netdev->priv_flags |= IFF_UNICAST_FLT;
4620
4621         /* MTU range: 68 - 1504 or 9710 */
4622         netdev->min_mtu = ETH_MIN_MTU;
4623         switch (adapter->hw.api_version) {
4624         case ixgbe_mbox_api_11:
4625         case ixgbe_mbox_api_12:
4626         case ixgbe_mbox_api_13:
4627         case ixgbe_mbox_api_14:
4628                 netdev->max_mtu = IXGBE_MAX_JUMBO_FRAME_SIZE -
4629                                   (ETH_HLEN + ETH_FCS_LEN);
4630                 break;
4631         default:
4632                 if (adapter->hw.mac.type != ixgbe_mac_82599_vf)
4633                         netdev->max_mtu = IXGBE_MAX_JUMBO_FRAME_SIZE -
4634                                           (ETH_HLEN + ETH_FCS_LEN);
4635                 else
4636                         netdev->max_mtu = ETH_DATA_LEN + ETH_FCS_LEN;
4637                 break;
4638         }
4639
4640         if (IXGBE_REMOVED(hw->hw_addr)) {
4641                 err = -EIO;
4642                 goto err_sw_init;
4643         }
4644
4645         timer_setup(&adapter->service_timer, ixgbevf_service_timer, 0);
4646
4647         INIT_WORK(&adapter->service_task, ixgbevf_service_task);
4648         set_bit(__IXGBEVF_SERVICE_INITED, &adapter->state);
4649         clear_bit(__IXGBEVF_SERVICE_SCHED, &adapter->state);
4650
4651         err = ixgbevf_init_interrupt_scheme(adapter);
4652         if (err)
4653                 goto err_sw_init;
4654
4655         strcpy(netdev->name, "eth%d");
4656
4657         err = register_netdev(netdev);
4658         if (err)
4659                 goto err_register;
4660
4661         pci_set_drvdata(pdev, netdev);
4662         netif_carrier_off(netdev);
4663         ixgbevf_init_ipsec_offload(adapter);
4664
4665         ixgbevf_init_last_counter_stats(adapter);
4666
4667         /* print the VF info */
4668         dev_info(&pdev->dev, "%pM\n", netdev->dev_addr);
4669         dev_info(&pdev->dev, "MAC: %d\n", hw->mac.type);
4670
4671         switch (hw->mac.type) {
4672         case ixgbe_mac_X550_vf:
4673                 dev_info(&pdev->dev, "Intel(R) X550 Virtual Function\n");
4674                 break;
4675         case ixgbe_mac_X540_vf:
4676                 dev_info(&pdev->dev, "Intel(R) X540 Virtual Function\n");
4677                 break;
4678         case ixgbe_mac_82599_vf:
4679         default:
4680                 dev_info(&pdev->dev, "Intel(R) 82599 Virtual Function\n");
4681                 break;
4682         }
4683
4684         return 0;
4685
4686 err_register:
4687         ixgbevf_clear_interrupt_scheme(adapter);
4688 err_sw_init:
4689         ixgbevf_reset_interrupt_capability(adapter);
4690         iounmap(adapter->io_addr);
4691         kfree(adapter->rss_key);
4692 err_ioremap:
4693         disable_dev = !test_and_set_bit(__IXGBEVF_DISABLED, &adapter->state);
4694         free_netdev(netdev);
4695 err_alloc_etherdev:
4696         pci_release_regions(pdev);
4697 err_pci_reg:
4698 err_dma:
4699         if (!adapter || disable_dev)
4700                 pci_disable_device(pdev);
4701         return err;
4702 }
4703
4704 /**
4705  * ixgbevf_remove - Device Removal Routine
4706  * @pdev: PCI device information struct
4707  *
4708  * ixgbevf_remove is called by the PCI subsystem to alert the driver
4709  * that it should release a PCI device.  The could be caused by a
4710  * Hot-Plug event, or because the driver is going to be removed from
4711  * memory.
4712  **/
4713 static void ixgbevf_remove(struct pci_dev *pdev)
4714 {
4715         struct net_device *netdev = pci_get_drvdata(pdev);
4716         struct ixgbevf_adapter *adapter;
4717         bool disable_dev;
4718
4719         if (!netdev)
4720                 return;
4721
4722         adapter = netdev_priv(netdev);
4723
4724         set_bit(__IXGBEVF_REMOVING, &adapter->state);
4725         cancel_work_sync(&adapter->service_task);
4726
4727         if (netdev->reg_state == NETREG_REGISTERED)
4728                 unregister_netdev(netdev);
4729
4730         ixgbevf_stop_ipsec_offload(adapter);
4731         ixgbevf_clear_interrupt_scheme(adapter);
4732         ixgbevf_reset_interrupt_capability(adapter);
4733
4734         iounmap(adapter->io_addr);
4735         pci_release_regions(pdev);
4736
4737         hw_dbg(&adapter->hw, "Remove complete\n");
4738
4739         kfree(adapter->rss_key);
4740         disable_dev = !test_and_set_bit(__IXGBEVF_DISABLED, &adapter->state);
4741         free_netdev(netdev);
4742
4743         if (disable_dev)
4744                 pci_disable_device(pdev);
4745 }
4746
4747 /**
4748  * ixgbevf_io_error_detected - called when PCI error is detected
4749  * @pdev: Pointer to PCI device
4750  * @state: The current pci connection state
4751  *
4752  * This function is called after a PCI bus error affecting
4753  * this device has been detected.
4754  **/
4755 static pci_ers_result_t ixgbevf_io_error_detected(struct pci_dev *pdev,
4756                                                   pci_channel_state_t state)
4757 {
4758         struct net_device *netdev = pci_get_drvdata(pdev);
4759         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4760
4761         if (!test_bit(__IXGBEVF_SERVICE_INITED, &adapter->state))
4762                 return PCI_ERS_RESULT_DISCONNECT;
4763
4764         rtnl_lock();
4765         netif_device_detach(netdev);
4766
4767         if (netif_running(netdev))
4768                 ixgbevf_close_suspend(adapter);
4769
4770         if (state == pci_channel_io_perm_failure) {
4771                 rtnl_unlock();
4772                 return PCI_ERS_RESULT_DISCONNECT;
4773         }
4774
4775         if (!test_and_set_bit(__IXGBEVF_DISABLED, &adapter->state))
4776                 pci_disable_device(pdev);
4777         rtnl_unlock();
4778
4779         /* Request a slot slot reset. */
4780         return PCI_ERS_RESULT_NEED_RESET;
4781 }
4782
4783 /**
4784  * ixgbevf_io_slot_reset - called after the pci bus has been reset.
4785  * @pdev: Pointer to PCI device
4786  *
4787  * Restart the card from scratch, as if from a cold-boot. Implementation
4788  * resembles the first-half of the ixgbevf_resume routine.
4789  **/
4790 static pci_ers_result_t ixgbevf_io_slot_reset(struct pci_dev *pdev)
4791 {
4792         struct net_device *netdev = pci_get_drvdata(pdev);
4793         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4794
4795         if (pci_enable_device_mem(pdev)) {
4796                 dev_err(&pdev->dev,
4797                         "Cannot re-enable PCI device after reset.\n");
4798                 return PCI_ERS_RESULT_DISCONNECT;
4799         }
4800
4801         adapter->hw.hw_addr = adapter->io_addr;
4802         smp_mb__before_atomic();
4803         clear_bit(__IXGBEVF_DISABLED, &adapter->state);
4804         pci_set_master(pdev);
4805
4806         ixgbevf_reset(adapter);
4807
4808         return PCI_ERS_RESULT_RECOVERED;
4809 }
4810
4811 /**
4812  * ixgbevf_io_resume - called when traffic can start flowing again.
4813  * @pdev: Pointer to PCI device
4814  *
4815  * This callback is called when the error recovery driver tells us that
4816  * its OK to resume normal operation. Implementation resembles the
4817  * second-half of the ixgbevf_resume routine.
4818  **/
4819 static void ixgbevf_io_resume(struct pci_dev *pdev)
4820 {
4821         struct net_device *netdev = pci_get_drvdata(pdev);
4822
4823         rtnl_lock();
4824         if (netif_running(netdev))
4825                 ixgbevf_open(netdev);
4826
4827         netif_device_attach(netdev);
4828         rtnl_unlock();
4829 }
4830
4831 /* PCI Error Recovery (ERS) */
4832 static const struct pci_error_handlers ixgbevf_err_handler = {
4833         .error_detected = ixgbevf_io_error_detected,
4834         .slot_reset = ixgbevf_io_slot_reset,
4835         .resume = ixgbevf_io_resume,
4836 };
4837
4838 static SIMPLE_DEV_PM_OPS(ixgbevf_pm_ops, ixgbevf_suspend, ixgbevf_resume);
4839
4840 static struct pci_driver ixgbevf_driver = {
4841         .name           = ixgbevf_driver_name,
4842         .id_table       = ixgbevf_pci_tbl,
4843         .probe          = ixgbevf_probe,
4844         .remove         = ixgbevf_remove,
4845
4846         /* Power Management Hooks */
4847         .driver.pm      = &ixgbevf_pm_ops,
4848
4849         .shutdown       = ixgbevf_shutdown,
4850         .err_handler    = &ixgbevf_err_handler
4851 };
4852
4853 /**
4854  * ixgbevf_init_module - Driver Registration Routine
4855  *
4856  * ixgbevf_init_module is the first routine called when the driver is
4857  * loaded. All it does is register with the PCI subsystem.
4858  **/
4859 static int __init ixgbevf_init_module(void)
4860 {
4861         pr_info("%s\n", ixgbevf_driver_string);
4862         pr_info("%s\n", ixgbevf_copyright);
4863         ixgbevf_wq = create_singlethread_workqueue(ixgbevf_driver_name);
4864         if (!ixgbevf_wq) {
4865                 pr_err("%s: Failed to create workqueue\n", ixgbevf_driver_name);
4866                 return -ENOMEM;
4867         }
4868
4869         return pci_register_driver(&ixgbevf_driver);
4870 }
4871
4872 module_init(ixgbevf_init_module);
4873
4874 /**
4875  * ixgbevf_exit_module - Driver Exit Cleanup Routine
4876  *
4877  * ixgbevf_exit_module is called just before the driver is removed
4878  * from memory.
4879  **/
4880 static void __exit ixgbevf_exit_module(void)
4881 {
4882         pci_unregister_driver(&ixgbevf_driver);
4883         if (ixgbevf_wq) {
4884                 destroy_workqueue(ixgbevf_wq);
4885                 ixgbevf_wq = NULL;
4886         }
4887 }
4888
4889 #ifdef DEBUG
4890 /**
4891  * ixgbevf_get_hw_dev_name - return device name string
4892  * used by hardware layer to print debugging information
4893  * @hw: pointer to private hardware struct
4894  **/
4895 char *ixgbevf_get_hw_dev_name(struct ixgbe_hw *hw)
4896 {
4897         struct ixgbevf_adapter *adapter = hw->back;
4898
4899         return adapter->netdev->name;
4900 }
4901
4902 #endif
4903 module_exit(ixgbevf_exit_module);
4904
4905 /* ixgbevf_main.c */