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

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