1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright(c) 1999 - 2024 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 - 2024 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 [board_e610_vf] = &ixgbevf_e610_vf_info, 55 [board_e610_vf_hv] = &ixgbevf_e610_vf_hv_info, 56 }; 57 58 /* ixgbevf_pci_tbl - PCI Device ID Table 59 * 60 * Wildcard entries (PCI_ANY_ID) should come last 61 * Last entry must be all 0s 62 * 63 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID, 64 * Class, Class Mask, private data (not used) } 65 */ 66 static const struct pci_device_id ixgbevf_pci_tbl[] = { 67 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_VF), board_82599_vf }, 68 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_VF_HV), board_82599_vf_hv }, 69 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540_VF), board_X540_vf }, 70 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540_VF_HV), board_X540_vf_hv }, 71 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550_VF), board_X550_vf }, 72 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550_VF_HV), board_X550_vf_hv }, 73 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_VF), board_X550EM_x_vf }, 74 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_VF_HV), board_X550EM_x_vf_hv}, 75 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_A_VF), board_x550em_a_vf }, 76 {PCI_VDEVICE_SUB(INTEL, IXGBE_DEV_ID_E610_VF, PCI_ANY_ID, 77 IXGBE_SUBDEV_ID_E610_VF_HV), board_e610_vf_hv}, 78 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_E610_VF), board_e610_vf}, 79 /* required last entry */ 80 {0, } 81 }; 82 MODULE_DEVICE_TABLE(pci, ixgbevf_pci_tbl); 83 84 MODULE_DESCRIPTION("Intel(R) 10 Gigabit Virtual Function Network Driver"); 85 MODULE_LICENSE("GPL v2"); 86 87 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK) 88 static int debug = -1; 89 module_param(debug, int, 0); 90 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); 91 92 static struct workqueue_struct *ixgbevf_wq; 93 94 static void ixgbevf_service_event_schedule(struct ixgbevf_adapter *adapter) 95 { 96 if (!test_bit(__IXGBEVF_DOWN, &adapter->state) && 97 !test_bit(__IXGBEVF_REMOVING, &adapter->state) && 98 !test_and_set_bit(__IXGBEVF_SERVICE_SCHED, &adapter->state)) 99 queue_work(ixgbevf_wq, &adapter->service_task); 100 } 101 102 static void ixgbevf_service_event_complete(struct ixgbevf_adapter *adapter) 103 { 104 BUG_ON(!test_bit(__IXGBEVF_SERVICE_SCHED, &adapter->state)); 105 106 /* flush memory to make sure state is correct before next watchdog */ 107 smp_mb__before_atomic(); 108 clear_bit(__IXGBEVF_SERVICE_SCHED, &adapter->state); 109 } 110 111 /* forward decls */ 112 static void ixgbevf_queue_reset_subtask(struct ixgbevf_adapter *adapter); 113 static void ixgbevf_set_itr(struct ixgbevf_q_vector *q_vector); 114 static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter *adapter); 115 static bool ixgbevf_can_reuse_rx_page(struct ixgbevf_rx_buffer *rx_buffer); 116 static void ixgbevf_reuse_rx_page(struct ixgbevf_ring *rx_ring, 117 struct ixgbevf_rx_buffer *old_buff); 118 119 static void ixgbevf_remove_adapter(struct ixgbe_hw *hw) 120 { 121 struct ixgbevf_adapter *adapter = hw->back; 122 123 if (!hw->hw_addr) 124 return; 125 hw->hw_addr = NULL; 126 dev_err(&adapter->pdev->dev, "Adapter removed\n"); 127 if (test_bit(__IXGBEVF_SERVICE_INITED, &adapter->state)) 128 ixgbevf_service_event_schedule(adapter); 129 } 130 131 static void ixgbevf_check_remove(struct ixgbe_hw *hw, u32 reg) 132 { 133 u32 value; 134 135 /* The following check not only optimizes a bit by not 136 * performing a read on the status register when the 137 * register just read was a status register read that 138 * returned IXGBE_FAILED_READ_REG. It also blocks any 139 * potential recursion. 140 */ 141 if (reg == IXGBE_VFSTATUS) { 142 ixgbevf_remove_adapter(hw); 143 return; 144 } 145 value = ixgbevf_read_reg(hw, IXGBE_VFSTATUS); 146 if (value == IXGBE_FAILED_READ_REG) 147 ixgbevf_remove_adapter(hw); 148 } 149 150 u32 ixgbevf_read_reg(struct ixgbe_hw *hw, u32 reg) 151 { 152 u8 __iomem *reg_addr = READ_ONCE(hw->hw_addr); 153 u32 value; 154 155 if (IXGBE_REMOVED(reg_addr)) 156 return IXGBE_FAILED_READ_REG; 157 value = readl(reg_addr + reg); 158 if (unlikely(value == IXGBE_FAILED_READ_REG)) 159 ixgbevf_check_remove(hw, reg); 160 return value; 161 } 162 163 /** 164 * ixgbevf_set_ivar - set IVAR registers - maps interrupt causes to vectors 165 * @adapter: pointer to adapter struct 166 * @direction: 0 for Rx, 1 for Tx, -1 for other causes 167 * @queue: queue to map the corresponding interrupt to 168 * @msix_vector: the vector to map to the corresponding queue 169 **/ 170 static void ixgbevf_set_ivar(struct ixgbevf_adapter *adapter, s8 direction, 171 u8 queue, u8 msix_vector) 172 { 173 u32 ivar, index; 174 struct ixgbe_hw *hw = &adapter->hw; 175 176 if (direction == -1) { 177 /* other causes */ 178 msix_vector |= IXGBE_IVAR_ALLOC_VAL; 179 ivar = IXGBE_READ_REG(hw, IXGBE_VTIVAR_MISC); 180 ivar &= ~0xFF; 181 ivar |= msix_vector; 182 IXGBE_WRITE_REG(hw, IXGBE_VTIVAR_MISC, ivar); 183 } else { 184 /* Tx or Rx causes */ 185 msix_vector |= IXGBE_IVAR_ALLOC_VAL; 186 index = ((16 * (queue & 1)) + (8 * direction)); 187 ivar = IXGBE_READ_REG(hw, IXGBE_VTIVAR(queue >> 1)); 188 ivar &= ~(0xFF << index); 189 ivar |= (msix_vector << index); 190 IXGBE_WRITE_REG(hw, IXGBE_VTIVAR(queue >> 1), ivar); 191 } 192 } 193 194 static u64 ixgbevf_get_tx_completed(struct ixgbevf_ring *ring) 195 { 196 return ring->stats.packets; 197 } 198 199 static u32 ixgbevf_get_tx_pending(struct ixgbevf_ring *ring) 200 { 201 struct ixgbevf_adapter *adapter = netdev_priv(ring->netdev); 202 struct ixgbe_hw *hw = &adapter->hw; 203 204 u32 head = IXGBE_READ_REG(hw, IXGBE_VFTDH(ring->reg_idx)); 205 u32 tail = IXGBE_READ_REG(hw, IXGBE_VFTDT(ring->reg_idx)); 206 207 if (head != tail) 208 return (head < tail) ? 209 tail - head : (tail + ring->count - head); 210 211 return 0; 212 } 213 214 static inline bool ixgbevf_check_tx_hang(struct ixgbevf_ring *tx_ring) 215 { 216 u32 tx_done = ixgbevf_get_tx_completed(tx_ring); 217 u32 tx_done_old = tx_ring->tx_stats.tx_done_old; 218 u32 tx_pending = ixgbevf_get_tx_pending(tx_ring); 219 220 clear_check_for_tx_hang(tx_ring); 221 222 /* Check for a hung queue, but be thorough. This verifies 223 * that a transmit has been completed since the previous 224 * check AND there is at least one packet pending. The 225 * ARMED bit is set to indicate a potential hang. 226 */ 227 if ((tx_done_old == tx_done) && tx_pending) { 228 /* make sure it is true for two checks in a row */ 229 return test_and_set_bit(__IXGBEVF_HANG_CHECK_ARMED, 230 &tx_ring->state); 231 } 232 /* reset the countdown */ 233 clear_bit(__IXGBEVF_HANG_CHECK_ARMED, &tx_ring->state); 234 235 /* update completed stats and continue */ 236 tx_ring->tx_stats.tx_done_old = tx_done; 237 238 return false; 239 } 240 241 static void ixgbevf_tx_timeout_reset(struct ixgbevf_adapter *adapter) 242 { 243 /* Do the reset outside of interrupt context */ 244 if (!test_bit(__IXGBEVF_DOWN, &adapter->state)) { 245 set_bit(__IXGBEVF_RESET_REQUESTED, &adapter->state); 246 ixgbevf_service_event_schedule(adapter); 247 } 248 } 249 250 /** 251 * ixgbevf_tx_timeout - Respond to a Tx Hang 252 * @netdev: network interface device structure 253 * @txqueue: transmit queue hanging (unused) 254 **/ 255 static void ixgbevf_tx_timeout(struct net_device *netdev, unsigned int __always_unused txqueue) 256 { 257 struct ixgbevf_adapter *adapter = netdev_priv(netdev); 258 259 ixgbevf_tx_timeout_reset(adapter); 260 } 261 262 /** 263 * ixgbevf_clean_tx_irq - Reclaim resources after transmit completes 264 * @q_vector: board private structure 265 * @tx_ring: tx ring to clean 266 * @napi_budget: Used to determine if we are in netpoll 267 **/ 268 static bool ixgbevf_clean_tx_irq(struct ixgbevf_q_vector *q_vector, 269 struct ixgbevf_ring *tx_ring, int napi_budget) 270 { 271 struct ixgbevf_adapter *adapter = q_vector->adapter; 272 struct ixgbevf_tx_buffer *tx_buffer; 273 union ixgbe_adv_tx_desc *tx_desc; 274 unsigned int total_bytes = 0, total_packets = 0, total_ipsec = 0; 275 unsigned int budget = tx_ring->count / 2; 276 unsigned int i = tx_ring->next_to_clean; 277 278 if (test_bit(__IXGBEVF_DOWN, &adapter->state)) 279 return true; 280 281 tx_buffer = &tx_ring->tx_buffer_info[i]; 282 tx_desc = IXGBEVF_TX_DESC(tx_ring, i); 283 i -= tx_ring->count; 284 285 do { 286 union ixgbe_adv_tx_desc *eop_desc = tx_buffer->next_to_watch; 287 288 /* if next_to_watch is not set then there is no work pending */ 289 if (!eop_desc) 290 break; 291 292 /* prevent any other reads prior to eop_desc */ 293 smp_rmb(); 294 295 /* if DD is not set pending work has not been completed */ 296 if (!(eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD))) 297 break; 298 299 /* clear next_to_watch to prevent false hangs */ 300 tx_buffer->next_to_watch = NULL; 301 302 /* update the statistics for this packet */ 303 total_bytes += tx_buffer->bytecount; 304 total_packets += tx_buffer->gso_segs; 305 if (tx_buffer->tx_flags & IXGBE_TX_FLAGS_IPSEC) 306 total_ipsec++; 307 308 /* free the skb */ 309 if (ring_is_xdp(tx_ring)) 310 page_frag_free(tx_buffer->data); 311 else 312 napi_consume_skb(tx_buffer->skb, napi_budget); 313 314 /* unmap skb header data */ 315 dma_unmap_single(tx_ring->dev, 316 dma_unmap_addr(tx_buffer, dma), 317 dma_unmap_len(tx_buffer, len), 318 DMA_TO_DEVICE); 319 320 /* clear tx_buffer data */ 321 dma_unmap_len_set(tx_buffer, len, 0); 322 323 /* unmap remaining buffers */ 324 while (tx_desc != eop_desc) { 325 tx_buffer++; 326 tx_desc++; 327 i++; 328 if (unlikely(!i)) { 329 i -= tx_ring->count; 330 tx_buffer = tx_ring->tx_buffer_info; 331 tx_desc = IXGBEVF_TX_DESC(tx_ring, 0); 332 } 333 334 /* unmap any remaining paged data */ 335 if (dma_unmap_len(tx_buffer, len)) { 336 dma_unmap_page(tx_ring->dev, 337 dma_unmap_addr(tx_buffer, dma), 338 dma_unmap_len(tx_buffer, len), 339 DMA_TO_DEVICE); 340 dma_unmap_len_set(tx_buffer, len, 0); 341 } 342 } 343 344 /* move us one more past the eop_desc for start of next pkt */ 345 tx_buffer++; 346 tx_desc++; 347 i++; 348 if (unlikely(!i)) { 349 i -= tx_ring->count; 350 tx_buffer = tx_ring->tx_buffer_info; 351 tx_desc = IXGBEVF_TX_DESC(tx_ring, 0); 352 } 353 354 /* issue prefetch for next Tx descriptor */ 355 prefetch(tx_desc); 356 357 /* update budget accounting */ 358 budget--; 359 } while (likely(budget)); 360 361 i += tx_ring->count; 362 tx_ring->next_to_clean = i; 363 u64_stats_update_begin(&tx_ring->syncp); 364 tx_ring->stats.bytes += total_bytes; 365 tx_ring->stats.packets += total_packets; 366 u64_stats_update_end(&tx_ring->syncp); 367 q_vector->tx.total_bytes += total_bytes; 368 q_vector->tx.total_packets += total_packets; 369 adapter->tx_ipsec += total_ipsec; 370 371 if (check_for_tx_hang(tx_ring) && ixgbevf_check_tx_hang(tx_ring)) { 372 struct ixgbe_hw *hw = &adapter->hw; 373 union ixgbe_adv_tx_desc *eop_desc; 374 375 eop_desc = tx_ring->tx_buffer_info[i].next_to_watch; 376 377 pr_err("Detected Tx Unit Hang%s\n" 378 " Tx Queue <%d>\n" 379 " TDH, TDT <%x>, <%x>\n" 380 " next_to_use <%x>\n" 381 " next_to_clean <%x>\n" 382 "tx_buffer_info[next_to_clean]\n" 383 " next_to_watch <%p>\n" 384 " eop_desc->wb.status <%x>\n" 385 " time_stamp <%lx>\n" 386 " jiffies <%lx>\n", 387 ring_is_xdp(tx_ring) ? " XDP" : "", 388 tx_ring->queue_index, 389 IXGBE_READ_REG(hw, IXGBE_VFTDH(tx_ring->reg_idx)), 390 IXGBE_READ_REG(hw, IXGBE_VFTDT(tx_ring->reg_idx)), 391 tx_ring->next_to_use, i, 392 eop_desc, (eop_desc ? eop_desc->wb.status : 0), 393 tx_ring->tx_buffer_info[i].time_stamp, jiffies); 394 395 if (!ring_is_xdp(tx_ring)) 396 netif_stop_subqueue(tx_ring->netdev, 397 tx_ring->queue_index); 398 399 /* schedule immediate reset if we believe we hung */ 400 ixgbevf_tx_timeout_reset(adapter); 401 402 return true; 403 } 404 405 if (ring_is_xdp(tx_ring)) 406 return !!budget; 407 408 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2) 409 if (unlikely(total_packets && netif_carrier_ok(tx_ring->netdev) && 410 (ixgbevf_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD))) { 411 /* Make sure that anybody stopping the queue after this 412 * sees the new next_to_clean. 413 */ 414 smp_mb(); 415 416 if (__netif_subqueue_stopped(tx_ring->netdev, 417 tx_ring->queue_index) && 418 !test_bit(__IXGBEVF_DOWN, &adapter->state)) { 419 netif_wake_subqueue(tx_ring->netdev, 420 tx_ring->queue_index); 421 ++tx_ring->tx_stats.restart_queue; 422 } 423 } 424 425 return !!budget; 426 } 427 428 /** 429 * ixgbevf_rx_skb - Helper function to determine proper Rx method 430 * @q_vector: structure containing interrupt and ring information 431 * @skb: packet to send up 432 **/ 433 static void ixgbevf_rx_skb(struct ixgbevf_q_vector *q_vector, 434 struct sk_buff *skb) 435 { 436 napi_gro_receive(&q_vector->napi, skb); 437 } 438 439 #define IXGBE_RSS_L4_TYPES_MASK \ 440 ((1ul << IXGBE_RXDADV_RSSTYPE_IPV4_TCP) | \ 441 (1ul << IXGBE_RXDADV_RSSTYPE_IPV4_UDP) | \ 442 (1ul << IXGBE_RXDADV_RSSTYPE_IPV6_TCP) | \ 443 (1ul << IXGBE_RXDADV_RSSTYPE_IPV6_UDP)) 444 445 static inline void ixgbevf_rx_hash(struct ixgbevf_ring *ring, 446 union ixgbe_adv_rx_desc *rx_desc, 447 struct sk_buff *skb) 448 { 449 u16 rss_type; 450 451 if (!(ring->netdev->features & NETIF_F_RXHASH)) 452 return; 453 454 rss_type = le16_to_cpu(rx_desc->wb.lower.lo_dword.hs_rss.pkt_info) & 455 IXGBE_RXDADV_RSSTYPE_MASK; 456 457 if (!rss_type) 458 return; 459 460 skb_set_hash(skb, le32_to_cpu(rx_desc->wb.lower.hi_dword.rss), 461 (IXGBE_RSS_L4_TYPES_MASK & (1ul << rss_type)) ? 462 PKT_HASH_TYPE_L4 : PKT_HASH_TYPE_L3); 463 } 464 465 /** 466 * ixgbevf_rx_checksum - indicate in skb if hw indicated a good cksum 467 * @ring: structure containig ring specific data 468 * @rx_desc: current Rx descriptor being processed 469 * @skb: skb currently being received and modified 470 **/ 471 static inline void ixgbevf_rx_checksum(struct ixgbevf_ring *ring, 472 union ixgbe_adv_rx_desc *rx_desc, 473 struct sk_buff *skb) 474 { 475 skb_checksum_none_assert(skb); 476 477 /* Rx csum disabled */ 478 if (!(ring->netdev->features & NETIF_F_RXCSUM)) 479 return; 480 481 /* if IP and error */ 482 if (ixgbevf_test_staterr(rx_desc, IXGBE_RXD_STAT_IPCS) && 483 ixgbevf_test_staterr(rx_desc, IXGBE_RXDADV_ERR_IPE)) { 484 ring->rx_stats.csum_err++; 485 return; 486 } 487 488 if (!ixgbevf_test_staterr(rx_desc, IXGBE_RXD_STAT_L4CS)) 489 return; 490 491 if (ixgbevf_test_staterr(rx_desc, IXGBE_RXDADV_ERR_TCPE)) { 492 ring->rx_stats.csum_err++; 493 return; 494 } 495 496 /* It must be a TCP or UDP packet with a valid checksum */ 497 skb->ip_summed = CHECKSUM_UNNECESSARY; 498 } 499 500 /** 501 * ixgbevf_process_skb_fields - Populate skb header fields from Rx descriptor 502 * @rx_ring: rx descriptor ring packet is being transacted on 503 * @rx_desc: pointer to the EOP Rx descriptor 504 * @skb: pointer to current skb being populated 505 * 506 * This function checks the ring, descriptor, and packet information in 507 * order to populate the checksum, VLAN, protocol, and other fields within 508 * the skb. 509 **/ 510 static void ixgbevf_process_skb_fields(struct ixgbevf_ring *rx_ring, 511 union ixgbe_adv_rx_desc *rx_desc, 512 struct sk_buff *skb) 513 { 514 ixgbevf_rx_hash(rx_ring, rx_desc, skb); 515 ixgbevf_rx_checksum(rx_ring, rx_desc, skb); 516 517 if (ixgbevf_test_staterr(rx_desc, IXGBE_RXD_STAT_VP)) { 518 u16 vid = le16_to_cpu(rx_desc->wb.upper.vlan); 519 unsigned long *active_vlans = netdev_priv(rx_ring->netdev); 520 521 if (test_bit(vid & VLAN_VID_MASK, active_vlans)) 522 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid); 523 } 524 525 if (ixgbevf_test_staterr(rx_desc, IXGBE_RXDADV_STAT_SECP)) 526 ixgbevf_ipsec_rx(rx_ring, rx_desc, skb); 527 528 skb->protocol = eth_type_trans(skb, rx_ring->netdev); 529 } 530 531 static 532 struct ixgbevf_rx_buffer *ixgbevf_get_rx_buffer(struct ixgbevf_ring *rx_ring, 533 const unsigned int size) 534 { 535 struct ixgbevf_rx_buffer *rx_buffer; 536 537 rx_buffer = &rx_ring->rx_buffer_info[rx_ring->next_to_clean]; 538 prefetchw(rx_buffer->page); 539 540 /* we are reusing so sync this buffer for CPU use */ 541 dma_sync_single_range_for_cpu(rx_ring->dev, 542 rx_buffer->dma, 543 rx_buffer->page_offset, 544 size, 545 DMA_FROM_DEVICE); 546 547 rx_buffer->pagecnt_bias--; 548 549 return rx_buffer; 550 } 551 552 static void ixgbevf_put_rx_buffer(struct ixgbevf_ring *rx_ring, 553 struct ixgbevf_rx_buffer *rx_buffer, 554 struct sk_buff *skb) 555 { 556 if (ixgbevf_can_reuse_rx_page(rx_buffer)) { 557 /* hand second half of page back to the ring */ 558 ixgbevf_reuse_rx_page(rx_ring, rx_buffer); 559 } else { 560 if (IS_ERR(skb)) 561 /* We are not reusing the buffer so unmap it and free 562 * any references we are holding to it 563 */ 564 dma_unmap_page_attrs(rx_ring->dev, rx_buffer->dma, 565 ixgbevf_rx_pg_size(rx_ring), 566 DMA_FROM_DEVICE, 567 IXGBEVF_RX_DMA_ATTR); 568 __page_frag_cache_drain(rx_buffer->page, 569 rx_buffer->pagecnt_bias); 570 } 571 572 /* clear contents of rx_buffer */ 573 rx_buffer->page = NULL; 574 } 575 576 /** 577 * ixgbevf_is_non_eop - process handling of non-EOP buffers 578 * @rx_ring: Rx ring being processed 579 * @rx_desc: Rx descriptor for current buffer 580 * 581 * This function updates next to clean. If the buffer is an EOP buffer 582 * this function exits returning false, otherwise it will place the 583 * sk_buff in the next buffer to be chained and return true indicating 584 * that this is in fact a non-EOP buffer. 585 **/ 586 static bool ixgbevf_is_non_eop(struct ixgbevf_ring *rx_ring, 587 union ixgbe_adv_rx_desc *rx_desc) 588 { 589 u32 ntc = rx_ring->next_to_clean + 1; 590 591 /* fetch, update, and store next to clean */ 592 ntc = (ntc < rx_ring->count) ? ntc : 0; 593 rx_ring->next_to_clean = ntc; 594 595 prefetch(IXGBEVF_RX_DESC(rx_ring, ntc)); 596 597 if (likely(ixgbevf_test_staterr(rx_desc, IXGBE_RXD_STAT_EOP))) 598 return false; 599 600 return true; 601 } 602 603 static inline unsigned int ixgbevf_rx_offset(struct ixgbevf_ring *rx_ring) 604 { 605 return ring_uses_build_skb(rx_ring) ? IXGBEVF_SKB_PAD : 0; 606 } 607 608 static bool ixgbevf_alloc_mapped_page(struct ixgbevf_ring *rx_ring, 609 struct ixgbevf_rx_buffer *bi) 610 { 611 struct page *page = bi->page; 612 dma_addr_t dma; 613 614 /* since we are recycling buffers we should seldom need to alloc */ 615 if (likely(page)) 616 return true; 617 618 /* alloc new page for storage */ 619 page = dev_alloc_pages(ixgbevf_rx_pg_order(rx_ring)); 620 if (unlikely(!page)) { 621 rx_ring->rx_stats.alloc_rx_page_failed++; 622 return false; 623 } 624 625 /* map page for use */ 626 dma = dma_map_page_attrs(rx_ring->dev, page, 0, 627 ixgbevf_rx_pg_size(rx_ring), 628 DMA_FROM_DEVICE, IXGBEVF_RX_DMA_ATTR); 629 630 /* if mapping failed free memory back to system since 631 * there isn't much point in holding memory we can't use 632 */ 633 if (dma_mapping_error(rx_ring->dev, dma)) { 634 __free_pages(page, ixgbevf_rx_pg_order(rx_ring)); 635 636 rx_ring->rx_stats.alloc_rx_page_failed++; 637 return false; 638 } 639 640 bi->dma = dma; 641 bi->page = page; 642 bi->page_offset = ixgbevf_rx_offset(rx_ring); 643 bi->pagecnt_bias = 1; 644 rx_ring->rx_stats.alloc_rx_page++; 645 646 return true; 647 } 648 649 /** 650 * ixgbevf_alloc_rx_buffers - Replace used receive buffers; packet split 651 * @rx_ring: rx descriptor ring (for a specific queue) to setup buffers on 652 * @cleaned_count: number of buffers to replace 653 **/ 654 static void ixgbevf_alloc_rx_buffers(struct ixgbevf_ring *rx_ring, 655 u16 cleaned_count) 656 { 657 union ixgbe_adv_rx_desc *rx_desc; 658 struct ixgbevf_rx_buffer *bi; 659 unsigned int i = rx_ring->next_to_use; 660 661 /* nothing to do or no valid netdev defined */ 662 if (!cleaned_count || !rx_ring->netdev) 663 return; 664 665 rx_desc = IXGBEVF_RX_DESC(rx_ring, i); 666 bi = &rx_ring->rx_buffer_info[i]; 667 i -= rx_ring->count; 668 669 do { 670 if (!ixgbevf_alloc_mapped_page(rx_ring, bi)) 671 break; 672 673 /* sync the buffer for use by the device */ 674 dma_sync_single_range_for_device(rx_ring->dev, bi->dma, 675 bi->page_offset, 676 ixgbevf_rx_bufsz(rx_ring), 677 DMA_FROM_DEVICE); 678 679 /* Refresh the desc even if pkt_addr didn't change 680 * because each write-back erases this info. 681 */ 682 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma + bi->page_offset); 683 684 rx_desc++; 685 bi++; 686 i++; 687 if (unlikely(!i)) { 688 rx_desc = IXGBEVF_RX_DESC(rx_ring, 0); 689 bi = rx_ring->rx_buffer_info; 690 i -= rx_ring->count; 691 } 692 693 /* clear the length for the next_to_use descriptor */ 694 rx_desc->wb.upper.length = 0; 695 696 cleaned_count--; 697 } while (cleaned_count); 698 699 i += rx_ring->count; 700 701 if (rx_ring->next_to_use != i) { 702 /* record the next descriptor to use */ 703 rx_ring->next_to_use = i; 704 705 /* update next to alloc since we have filled the ring */ 706 rx_ring->next_to_alloc = i; 707 708 /* Force memory writes to complete before letting h/w 709 * know there are new descriptors to fetch. (Only 710 * applicable for weak-ordered memory model archs, 711 * such as IA-64). 712 */ 713 wmb(); 714 ixgbevf_write_tail(rx_ring, i); 715 } 716 } 717 718 /** 719 * ixgbevf_cleanup_headers - Correct corrupted or empty headers 720 * @rx_ring: rx descriptor ring packet is being transacted on 721 * @rx_desc: pointer to the EOP Rx descriptor 722 * @skb: pointer to current skb being fixed 723 * 724 * Check for corrupted packet headers caused by senders on the local L2 725 * embedded NIC switch not setting up their Tx Descriptors right. These 726 * should be very rare. 727 * 728 * Also address the case where we are pulling data in on pages only 729 * and as such no data is present in the skb header. 730 * 731 * In addition if skb is not at least 60 bytes we need to pad it so that 732 * it is large enough to qualify as a valid Ethernet frame. 733 * 734 * Returns true if an error was encountered and skb was freed. 735 **/ 736 static bool ixgbevf_cleanup_headers(struct ixgbevf_ring *rx_ring, 737 union ixgbe_adv_rx_desc *rx_desc, 738 struct sk_buff *skb) 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 = napi_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 int ixgbevf_run_xdp(struct ixgbevf_adapter *adapter, 1049 struct ixgbevf_ring *rx_ring, 1050 struct xdp_buff *xdp) 1051 { 1052 int result = IXGBEVF_XDP_PASS; 1053 struct ixgbevf_ring *xdp_ring; 1054 struct bpf_prog *xdp_prog; 1055 u32 act; 1056 1057 xdp_prog = READ_ONCE(rx_ring->xdp_prog); 1058 1059 if (!xdp_prog) 1060 goto xdp_out; 1061 1062 act = bpf_prog_run_xdp(xdp_prog, xdp); 1063 switch (act) { 1064 case XDP_PASS: 1065 break; 1066 case XDP_TX: 1067 xdp_ring = adapter->xdp_ring[rx_ring->queue_index]; 1068 result = ixgbevf_xmit_xdp_ring(xdp_ring, xdp); 1069 if (result == IXGBEVF_XDP_CONSUMED) 1070 goto out_failure; 1071 break; 1072 default: 1073 bpf_warn_invalid_xdp_action(rx_ring->netdev, xdp_prog, act); 1074 fallthrough; 1075 case XDP_ABORTED: 1076 out_failure: 1077 trace_xdp_exception(rx_ring->netdev, xdp_prog, act); 1078 fallthrough; /* handle aborts by dropping packet */ 1079 case XDP_DROP: 1080 result = IXGBEVF_XDP_CONSUMED; 1081 break; 1082 } 1083 xdp_out: 1084 return result; 1085 } 1086 1087 static unsigned int ixgbevf_rx_frame_truesize(struct ixgbevf_ring *rx_ring, 1088 unsigned int size) 1089 { 1090 unsigned int truesize; 1091 1092 #if (PAGE_SIZE < 8192) 1093 truesize = ixgbevf_rx_pg_size(rx_ring) / 2; /* Must be power-of-2 */ 1094 #else 1095 truesize = ring_uses_build_skb(rx_ring) ? 1096 SKB_DATA_ALIGN(IXGBEVF_SKB_PAD + size) + 1097 SKB_DATA_ALIGN(sizeof(struct skb_shared_info)) : 1098 SKB_DATA_ALIGN(size); 1099 #endif 1100 return truesize; 1101 } 1102 1103 static void ixgbevf_rx_buffer_flip(struct ixgbevf_ring *rx_ring, 1104 struct ixgbevf_rx_buffer *rx_buffer, 1105 unsigned int size) 1106 { 1107 unsigned int truesize = ixgbevf_rx_frame_truesize(rx_ring, size); 1108 1109 #if (PAGE_SIZE < 8192) 1110 rx_buffer->page_offset ^= truesize; 1111 #else 1112 rx_buffer->page_offset += truesize; 1113 #endif 1114 } 1115 1116 static int ixgbevf_clean_rx_irq(struct ixgbevf_q_vector *q_vector, 1117 struct ixgbevf_ring *rx_ring, 1118 int budget) 1119 { 1120 unsigned int total_rx_bytes = 0, total_rx_packets = 0, frame_sz = 0; 1121 struct ixgbevf_adapter *adapter = q_vector->adapter; 1122 u16 cleaned_count = ixgbevf_desc_unused(rx_ring); 1123 struct sk_buff *skb = rx_ring->skb; 1124 bool xdp_xmit = false; 1125 struct xdp_buff xdp; 1126 int xdp_res = 0; 1127 1128 /* Frame size depend on rx_ring setup when PAGE_SIZE=4K */ 1129 #if (PAGE_SIZE < 8192) 1130 frame_sz = ixgbevf_rx_frame_truesize(rx_ring, 0); 1131 #endif 1132 xdp_init_buff(&xdp, frame_sz, &rx_ring->xdp_rxq); 1133 1134 while (likely(total_rx_packets < budget)) { 1135 struct ixgbevf_rx_buffer *rx_buffer; 1136 union ixgbe_adv_rx_desc *rx_desc; 1137 unsigned int size; 1138 1139 /* return some buffers to hardware, one at a time is too slow */ 1140 if (cleaned_count >= IXGBEVF_RX_BUFFER_WRITE) { 1141 ixgbevf_alloc_rx_buffers(rx_ring, cleaned_count); 1142 cleaned_count = 0; 1143 } 1144 1145 rx_desc = IXGBEVF_RX_DESC(rx_ring, rx_ring->next_to_clean); 1146 size = le16_to_cpu(rx_desc->wb.upper.length); 1147 if (!size) 1148 break; 1149 1150 /* This memory barrier is needed to keep us from reading 1151 * any other fields out of the rx_desc until we know the 1152 * RXD_STAT_DD bit is set 1153 */ 1154 rmb(); 1155 1156 rx_buffer = ixgbevf_get_rx_buffer(rx_ring, size); 1157 1158 /* retrieve a buffer from the ring */ 1159 if (!skb) { 1160 unsigned int offset = ixgbevf_rx_offset(rx_ring); 1161 unsigned char *hard_start; 1162 1163 hard_start = page_address(rx_buffer->page) + 1164 rx_buffer->page_offset - offset; 1165 xdp_prepare_buff(&xdp, hard_start, offset, size, true); 1166 #if (PAGE_SIZE > 4096) 1167 /* At larger PAGE_SIZE, frame_sz depend on len size */ 1168 xdp.frame_sz = ixgbevf_rx_frame_truesize(rx_ring, size); 1169 #endif 1170 xdp_res = ixgbevf_run_xdp(adapter, rx_ring, &xdp); 1171 } 1172 1173 if (xdp_res) { 1174 if (xdp_res == IXGBEVF_XDP_TX) { 1175 xdp_xmit = true; 1176 ixgbevf_rx_buffer_flip(rx_ring, rx_buffer, 1177 size); 1178 } else { 1179 rx_buffer->pagecnt_bias++; 1180 } 1181 total_rx_packets++; 1182 total_rx_bytes += size; 1183 } else if (skb) { 1184 ixgbevf_add_rx_frag(rx_ring, rx_buffer, skb, size); 1185 } else if (ring_uses_build_skb(rx_ring)) { 1186 skb = ixgbevf_build_skb(rx_ring, rx_buffer, 1187 &xdp, rx_desc); 1188 } else { 1189 skb = ixgbevf_construct_skb(rx_ring, rx_buffer, 1190 &xdp, rx_desc); 1191 } 1192 1193 /* exit if we failed to retrieve a buffer */ 1194 if (!xdp_res && !skb) { 1195 rx_ring->rx_stats.alloc_rx_buff_failed++; 1196 rx_buffer->pagecnt_bias++; 1197 break; 1198 } 1199 1200 ixgbevf_put_rx_buffer(rx_ring, rx_buffer, skb); 1201 cleaned_count++; 1202 1203 /* fetch next buffer in frame if non-eop */ 1204 if (ixgbevf_is_non_eop(rx_ring, rx_desc)) 1205 continue; 1206 1207 /* verify the packet layout is correct */ 1208 if (xdp_res || ixgbevf_cleanup_headers(rx_ring, rx_desc, skb)) { 1209 skb = NULL; 1210 continue; 1211 } 1212 1213 /* probably a little skewed due to removing CRC */ 1214 total_rx_bytes += skb->len; 1215 1216 /* Workaround hardware that can't do proper VEPA multicast 1217 * source pruning. 1218 */ 1219 if ((skb->pkt_type == PACKET_BROADCAST || 1220 skb->pkt_type == PACKET_MULTICAST) && 1221 ether_addr_equal(rx_ring->netdev->dev_addr, 1222 eth_hdr(skb)->h_source)) { 1223 dev_kfree_skb_irq(skb); 1224 continue; 1225 } 1226 1227 /* populate checksum, VLAN, and protocol */ 1228 ixgbevf_process_skb_fields(rx_ring, rx_desc, skb); 1229 1230 ixgbevf_rx_skb(q_vector, skb); 1231 1232 /* reset skb pointer */ 1233 skb = NULL; 1234 1235 /* update budget accounting */ 1236 total_rx_packets++; 1237 } 1238 1239 /* place incomplete frames back on ring for completion */ 1240 rx_ring->skb = skb; 1241 1242 if (xdp_xmit) { 1243 struct ixgbevf_ring *xdp_ring = 1244 adapter->xdp_ring[rx_ring->queue_index]; 1245 1246 /* Force memory writes to complete before letting h/w 1247 * know there are new descriptors to fetch. 1248 */ 1249 wmb(); 1250 ixgbevf_write_tail(xdp_ring, xdp_ring->next_to_use); 1251 } 1252 1253 u64_stats_update_begin(&rx_ring->syncp); 1254 rx_ring->stats.packets += total_rx_packets; 1255 rx_ring->stats.bytes += total_rx_bytes; 1256 u64_stats_update_end(&rx_ring->syncp); 1257 q_vector->rx.total_packets += total_rx_packets; 1258 q_vector->rx.total_bytes += total_rx_bytes; 1259 1260 return total_rx_packets; 1261 } 1262 1263 /** 1264 * ixgbevf_poll - NAPI polling calback 1265 * @napi: napi struct with our devices info in it 1266 * @budget: amount of work driver is allowed to do this pass, in packets 1267 * 1268 * This function will clean more than one or more rings associated with a 1269 * q_vector. 1270 **/ 1271 static int ixgbevf_poll(struct napi_struct *napi, int budget) 1272 { 1273 struct ixgbevf_q_vector *q_vector = 1274 container_of(napi, struct ixgbevf_q_vector, napi); 1275 struct ixgbevf_adapter *adapter = q_vector->adapter; 1276 struct ixgbevf_ring *ring; 1277 int per_ring_budget, work_done = 0; 1278 bool clean_complete = true; 1279 1280 ixgbevf_for_each_ring(ring, q_vector->tx) { 1281 if (!ixgbevf_clean_tx_irq(q_vector, ring, budget)) 1282 clean_complete = false; 1283 } 1284 1285 if (budget <= 0) 1286 return budget; 1287 1288 /* attempt to distribute budget to each queue fairly, but don't allow 1289 * the budget to go below 1 because we'll exit polling 1290 */ 1291 if (q_vector->rx.count > 1) 1292 per_ring_budget = max(budget/q_vector->rx.count, 1); 1293 else 1294 per_ring_budget = budget; 1295 1296 ixgbevf_for_each_ring(ring, q_vector->rx) { 1297 int cleaned = ixgbevf_clean_rx_irq(q_vector, ring, 1298 per_ring_budget); 1299 work_done += cleaned; 1300 if (cleaned >= per_ring_budget) 1301 clean_complete = false; 1302 } 1303 1304 /* If all work not completed, return budget and keep polling */ 1305 if (!clean_complete) 1306 return budget; 1307 1308 /* Exit the polling mode, but don't re-enable interrupts if stack might 1309 * poll us due to busy-polling 1310 */ 1311 if (likely(napi_complete_done(napi, work_done))) { 1312 if (adapter->rx_itr_setting == 1) 1313 ixgbevf_set_itr(q_vector); 1314 if (!test_bit(__IXGBEVF_DOWN, &adapter->state) && 1315 !test_bit(__IXGBEVF_REMOVING, &adapter->state)) 1316 ixgbevf_irq_enable_queues(adapter, 1317 BIT(q_vector->v_idx)); 1318 } 1319 1320 return min(work_done, budget - 1); 1321 } 1322 1323 /** 1324 * ixgbevf_write_eitr - write VTEITR register in hardware specific way 1325 * @q_vector: structure containing interrupt and ring information 1326 **/ 1327 void ixgbevf_write_eitr(struct ixgbevf_q_vector *q_vector) 1328 { 1329 struct ixgbevf_adapter *adapter = q_vector->adapter; 1330 struct ixgbe_hw *hw = &adapter->hw; 1331 int v_idx = q_vector->v_idx; 1332 u32 itr_reg = q_vector->itr & IXGBE_MAX_EITR; 1333 1334 /* set the WDIS bit to not clear the timer bits and cause an 1335 * immediate assertion of the interrupt 1336 */ 1337 itr_reg |= IXGBE_EITR_CNT_WDIS; 1338 1339 IXGBE_WRITE_REG(hw, IXGBE_VTEITR(v_idx), itr_reg); 1340 } 1341 1342 /** 1343 * ixgbevf_configure_msix - Configure MSI-X hardware 1344 * @adapter: board private structure 1345 * 1346 * ixgbevf_configure_msix sets up the hardware to properly generate MSI-X 1347 * interrupts. 1348 **/ 1349 static void ixgbevf_configure_msix(struct ixgbevf_adapter *adapter) 1350 { 1351 struct ixgbevf_q_vector *q_vector; 1352 int q_vectors, v_idx; 1353 1354 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; 1355 adapter->eims_enable_mask = 0; 1356 1357 /* Populate the IVAR table and set the ITR values to the 1358 * corresponding register. 1359 */ 1360 for (v_idx = 0; v_idx < q_vectors; v_idx++) { 1361 struct ixgbevf_ring *ring; 1362 1363 q_vector = adapter->q_vector[v_idx]; 1364 1365 ixgbevf_for_each_ring(ring, q_vector->rx) 1366 ixgbevf_set_ivar(adapter, 0, ring->reg_idx, v_idx); 1367 1368 ixgbevf_for_each_ring(ring, q_vector->tx) 1369 ixgbevf_set_ivar(adapter, 1, ring->reg_idx, v_idx); 1370 1371 if (q_vector->tx.ring && !q_vector->rx.ring) { 1372 /* Tx only vector */ 1373 if (adapter->tx_itr_setting == 1) 1374 q_vector->itr = IXGBE_12K_ITR; 1375 else 1376 q_vector->itr = adapter->tx_itr_setting; 1377 } else { 1378 /* Rx or Rx/Tx vector */ 1379 if (adapter->rx_itr_setting == 1) 1380 q_vector->itr = IXGBE_20K_ITR; 1381 else 1382 q_vector->itr = adapter->rx_itr_setting; 1383 } 1384 1385 /* add q_vector eims value to global eims_enable_mask */ 1386 adapter->eims_enable_mask |= BIT(v_idx); 1387 1388 ixgbevf_write_eitr(q_vector); 1389 } 1390 1391 ixgbevf_set_ivar(adapter, -1, 1, v_idx); 1392 /* setup eims_other and add value to global eims_enable_mask */ 1393 adapter->eims_other = BIT(v_idx); 1394 adapter->eims_enable_mask |= adapter->eims_other; 1395 } 1396 1397 enum latency_range { 1398 lowest_latency = 0, 1399 low_latency = 1, 1400 bulk_latency = 2, 1401 latency_invalid = 255 1402 }; 1403 1404 /** 1405 * ixgbevf_update_itr - update the dynamic ITR value based on statistics 1406 * @q_vector: structure containing interrupt and ring information 1407 * @ring_container: structure containing ring performance data 1408 * 1409 * Stores a new ITR value based on packets and byte 1410 * counts during the last interrupt. The advantage of per interrupt 1411 * computation is faster updates and more accurate ITR for the current 1412 * traffic pattern. Constants in this function were computed 1413 * based on theoretical maximum wire speed and thresholds were set based 1414 * on testing data as well as attempting to minimize response time 1415 * while increasing bulk throughput. 1416 **/ 1417 static void ixgbevf_update_itr(struct ixgbevf_q_vector *q_vector, 1418 struct ixgbevf_ring_container *ring_container) 1419 { 1420 int bytes = ring_container->total_bytes; 1421 int packets = ring_container->total_packets; 1422 u32 timepassed_us; 1423 u64 bytes_perint; 1424 u8 itr_setting = ring_container->itr; 1425 1426 if (packets == 0) 1427 return; 1428 1429 /* simple throttle rate management 1430 * 0-20MB/s lowest (100000 ints/s) 1431 * 20-100MB/s low (20000 ints/s) 1432 * 100-1249MB/s bulk (12000 ints/s) 1433 */ 1434 /* what was last interrupt timeslice? */ 1435 timepassed_us = q_vector->itr >> 2; 1436 if (timepassed_us == 0) 1437 return; 1438 1439 bytes_perint = bytes / timepassed_us; /* bytes/usec */ 1440 1441 switch (itr_setting) { 1442 case lowest_latency: 1443 if (bytes_perint > 10) 1444 itr_setting = low_latency; 1445 break; 1446 case low_latency: 1447 if (bytes_perint > 20) 1448 itr_setting = bulk_latency; 1449 else if (bytes_perint <= 10) 1450 itr_setting = lowest_latency; 1451 break; 1452 case bulk_latency: 1453 if (bytes_perint <= 20) 1454 itr_setting = low_latency; 1455 break; 1456 } 1457 1458 /* clear work counters since we have the values we need */ 1459 ring_container->total_bytes = 0; 1460 ring_container->total_packets = 0; 1461 1462 /* write updated itr to ring container */ 1463 ring_container->itr = itr_setting; 1464 } 1465 1466 static void ixgbevf_set_itr(struct ixgbevf_q_vector *q_vector) 1467 { 1468 u32 new_itr = q_vector->itr; 1469 u8 current_itr; 1470 1471 ixgbevf_update_itr(q_vector, &q_vector->tx); 1472 ixgbevf_update_itr(q_vector, &q_vector->rx); 1473 1474 current_itr = max(q_vector->rx.itr, q_vector->tx.itr); 1475 1476 switch (current_itr) { 1477 /* counts and packets in update_itr are dependent on these numbers */ 1478 case lowest_latency: 1479 new_itr = IXGBE_100K_ITR; 1480 break; 1481 case low_latency: 1482 new_itr = IXGBE_20K_ITR; 1483 break; 1484 case bulk_latency: 1485 new_itr = IXGBE_12K_ITR; 1486 break; 1487 default: 1488 break; 1489 } 1490 1491 if (new_itr != q_vector->itr) { 1492 /* do an exponential smoothing */ 1493 new_itr = (10 * new_itr * q_vector->itr) / 1494 ((9 * new_itr) + q_vector->itr); 1495 1496 /* save the algorithm value here */ 1497 q_vector->itr = new_itr; 1498 1499 ixgbevf_write_eitr(q_vector); 1500 } 1501 } 1502 1503 static irqreturn_t ixgbevf_msix_other(int irq, void *data) 1504 { 1505 struct ixgbevf_adapter *adapter = data; 1506 struct ixgbe_hw *hw = &adapter->hw; 1507 1508 hw->mac.get_link_status = 1; 1509 1510 ixgbevf_service_event_schedule(adapter); 1511 1512 IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, adapter->eims_other); 1513 1514 return IRQ_HANDLED; 1515 } 1516 1517 /** 1518 * ixgbevf_msix_clean_rings - single unshared vector rx clean (all queues) 1519 * @irq: unused 1520 * @data: pointer to our q_vector struct for this interrupt vector 1521 **/ 1522 static irqreturn_t ixgbevf_msix_clean_rings(int irq, void *data) 1523 { 1524 struct ixgbevf_q_vector *q_vector = data; 1525 1526 /* EIAM disabled interrupts (on this vector) for us */ 1527 if (q_vector->rx.ring || q_vector->tx.ring) 1528 napi_schedule_irqoff(&q_vector->napi); 1529 1530 return IRQ_HANDLED; 1531 } 1532 1533 /** 1534 * ixgbevf_request_msix_irqs - Initialize MSI-X interrupts 1535 * @adapter: board private structure 1536 * 1537 * ixgbevf_request_msix_irqs allocates MSI-X vectors and requests 1538 * interrupts from the kernel. 1539 **/ 1540 static int ixgbevf_request_msix_irqs(struct ixgbevf_adapter *adapter) 1541 { 1542 struct net_device *netdev = adapter->netdev; 1543 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; 1544 unsigned int ri = 0, ti = 0; 1545 int vector, err; 1546 1547 for (vector = 0; vector < q_vectors; vector++) { 1548 struct ixgbevf_q_vector *q_vector = adapter->q_vector[vector]; 1549 struct msix_entry *entry = &adapter->msix_entries[vector]; 1550 1551 if (q_vector->tx.ring && q_vector->rx.ring) { 1552 snprintf(q_vector->name, sizeof(q_vector->name), 1553 "%s-TxRx-%u", netdev->name, ri++); 1554 ti++; 1555 } else if (q_vector->rx.ring) { 1556 snprintf(q_vector->name, sizeof(q_vector->name), 1557 "%s-rx-%u", netdev->name, ri++); 1558 } else if (q_vector->tx.ring) { 1559 snprintf(q_vector->name, sizeof(q_vector->name), 1560 "%s-tx-%u", netdev->name, ti++); 1561 } else { 1562 /* skip this unused q_vector */ 1563 continue; 1564 } 1565 err = request_irq(entry->vector, &ixgbevf_msix_clean_rings, 0, 1566 q_vector->name, q_vector); 1567 if (err) { 1568 hw_dbg(&adapter->hw, 1569 "request_irq failed for MSIX interrupt Error: %d\n", 1570 err); 1571 goto free_queue_irqs; 1572 } 1573 } 1574 1575 err = request_irq(adapter->msix_entries[vector].vector, 1576 &ixgbevf_msix_other, 0, netdev->name, adapter); 1577 if (err) { 1578 hw_dbg(&adapter->hw, "request_irq for msix_other failed: %d\n", 1579 err); 1580 goto free_queue_irqs; 1581 } 1582 1583 return 0; 1584 1585 free_queue_irqs: 1586 while (vector) { 1587 vector--; 1588 free_irq(adapter->msix_entries[vector].vector, 1589 adapter->q_vector[vector]); 1590 } 1591 /* This failure is non-recoverable - it indicates the system is 1592 * out of MSIX vector resources and the VF driver cannot run 1593 * without them. Set the number of msix vectors to zero 1594 * indicating that not enough can be allocated. The error 1595 * will be returned to the user indicating device open failed. 1596 * Any further attempts to force the driver to open will also 1597 * fail. The only way to recover is to unload the driver and 1598 * reload it again. If the system has recovered some MSIX 1599 * vectors then it may succeed. 1600 */ 1601 adapter->num_msix_vectors = 0; 1602 return err; 1603 } 1604 1605 /** 1606 * ixgbevf_request_irq - initialize interrupts 1607 * @adapter: board private structure 1608 * 1609 * Attempts to configure interrupts using the best available 1610 * capabilities of the hardware and kernel. 1611 **/ 1612 static int ixgbevf_request_irq(struct ixgbevf_adapter *adapter) 1613 { 1614 int err = ixgbevf_request_msix_irqs(adapter); 1615 1616 if (err) 1617 hw_dbg(&adapter->hw, "request_irq failed, Error %d\n", err); 1618 1619 return err; 1620 } 1621 1622 static void ixgbevf_free_irq(struct ixgbevf_adapter *adapter) 1623 { 1624 int i, q_vectors; 1625 1626 if (!adapter->msix_entries) 1627 return; 1628 1629 q_vectors = adapter->num_msix_vectors; 1630 i = q_vectors - 1; 1631 1632 free_irq(adapter->msix_entries[i].vector, adapter); 1633 i--; 1634 1635 for (; i >= 0; i--) { 1636 /* free only the irqs that were actually requested */ 1637 if (!adapter->q_vector[i]->rx.ring && 1638 !adapter->q_vector[i]->tx.ring) 1639 continue; 1640 1641 free_irq(adapter->msix_entries[i].vector, 1642 adapter->q_vector[i]); 1643 } 1644 } 1645 1646 /** 1647 * ixgbevf_irq_disable - Mask off interrupt generation on the NIC 1648 * @adapter: board private structure 1649 **/ 1650 static inline void ixgbevf_irq_disable(struct ixgbevf_adapter *adapter) 1651 { 1652 struct ixgbe_hw *hw = &adapter->hw; 1653 int i; 1654 1655 IXGBE_WRITE_REG(hw, IXGBE_VTEIAM, 0); 1656 IXGBE_WRITE_REG(hw, IXGBE_VTEIMC, ~0); 1657 IXGBE_WRITE_REG(hw, IXGBE_VTEIAC, 0); 1658 1659 IXGBE_WRITE_FLUSH(hw); 1660 1661 for (i = 0; i < adapter->num_msix_vectors; i++) 1662 synchronize_irq(adapter->msix_entries[i].vector); 1663 } 1664 1665 /** 1666 * ixgbevf_irq_enable - Enable default interrupt generation settings 1667 * @adapter: board private structure 1668 **/ 1669 static inline void ixgbevf_irq_enable(struct ixgbevf_adapter *adapter) 1670 { 1671 struct ixgbe_hw *hw = &adapter->hw; 1672 1673 IXGBE_WRITE_REG(hw, IXGBE_VTEIAM, adapter->eims_enable_mask); 1674 IXGBE_WRITE_REG(hw, IXGBE_VTEIAC, adapter->eims_enable_mask); 1675 IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, adapter->eims_enable_mask); 1676 } 1677 1678 /** 1679 * ixgbevf_configure_tx_ring - Configure 82599 VF Tx ring after Reset 1680 * @adapter: board private structure 1681 * @ring: structure containing ring specific data 1682 * 1683 * Configure the Tx descriptor ring after a reset. 1684 **/ 1685 static void ixgbevf_configure_tx_ring(struct ixgbevf_adapter *adapter, 1686 struct ixgbevf_ring *ring) 1687 { 1688 struct ixgbe_hw *hw = &adapter->hw; 1689 u64 tdba = ring->dma; 1690 int wait_loop = 10; 1691 u32 txdctl = IXGBE_TXDCTL_ENABLE; 1692 u8 reg_idx = ring->reg_idx; 1693 1694 /* disable queue to avoid issues while updating state */ 1695 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(reg_idx), IXGBE_TXDCTL_SWFLSH); 1696 IXGBE_WRITE_FLUSH(hw); 1697 1698 IXGBE_WRITE_REG(hw, IXGBE_VFTDBAL(reg_idx), tdba & DMA_BIT_MASK(32)); 1699 IXGBE_WRITE_REG(hw, IXGBE_VFTDBAH(reg_idx), tdba >> 32); 1700 IXGBE_WRITE_REG(hw, IXGBE_VFTDLEN(reg_idx), 1701 ring->count * sizeof(union ixgbe_adv_tx_desc)); 1702 1703 /* disable head writeback */ 1704 IXGBE_WRITE_REG(hw, IXGBE_VFTDWBAH(reg_idx), 0); 1705 IXGBE_WRITE_REG(hw, IXGBE_VFTDWBAL(reg_idx), 0); 1706 1707 /* enable relaxed ordering */ 1708 IXGBE_WRITE_REG(hw, IXGBE_VFDCA_TXCTRL(reg_idx), 1709 (IXGBE_DCA_TXCTRL_DESC_RRO_EN | 1710 IXGBE_DCA_TXCTRL_DATA_RRO_EN)); 1711 1712 /* reset head and tail pointers */ 1713 IXGBE_WRITE_REG(hw, IXGBE_VFTDH(reg_idx), 0); 1714 IXGBE_WRITE_REG(hw, IXGBE_VFTDT(reg_idx), 0); 1715 ring->tail = adapter->io_addr + IXGBE_VFTDT(reg_idx); 1716 1717 /* reset ntu and ntc to place SW in sync with hardwdare */ 1718 ring->next_to_clean = 0; 1719 ring->next_to_use = 0; 1720 1721 /* In order to avoid issues WTHRESH + PTHRESH should always be equal 1722 * to or less than the number of on chip descriptors, which is 1723 * currently 40. 1724 */ 1725 txdctl |= (8 << 16); /* WTHRESH = 8 */ 1726 1727 /* Setting PTHRESH to 32 both improves performance */ 1728 txdctl |= (1u << 8) | /* HTHRESH = 1 */ 1729 32; /* PTHRESH = 32 */ 1730 1731 /* reinitialize tx_buffer_info */ 1732 memset(ring->tx_buffer_info, 0, 1733 sizeof(struct ixgbevf_tx_buffer) * ring->count); 1734 1735 clear_bit(__IXGBEVF_HANG_CHECK_ARMED, &ring->state); 1736 clear_bit(__IXGBEVF_TX_XDP_RING_PRIMED, &ring->state); 1737 1738 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(reg_idx), txdctl); 1739 1740 /* poll to verify queue is enabled */ 1741 do { 1742 usleep_range(1000, 2000); 1743 txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(reg_idx)); 1744 } while (--wait_loop && !(txdctl & IXGBE_TXDCTL_ENABLE)); 1745 if (!wait_loop) 1746 hw_dbg(hw, "Could not enable Tx Queue %d\n", reg_idx); 1747 } 1748 1749 /** 1750 * ixgbevf_configure_tx - Configure 82599 VF Transmit Unit after Reset 1751 * @adapter: board private structure 1752 * 1753 * Configure the Tx unit of the MAC after a reset. 1754 **/ 1755 static void ixgbevf_configure_tx(struct ixgbevf_adapter *adapter) 1756 { 1757 u32 i; 1758 1759 /* Setup the HW Tx Head and Tail descriptor pointers */ 1760 for (i = 0; i < adapter->num_tx_queues; i++) 1761 ixgbevf_configure_tx_ring(adapter, adapter->tx_ring[i]); 1762 for (i = 0; i < adapter->num_xdp_queues; i++) 1763 ixgbevf_configure_tx_ring(adapter, adapter->xdp_ring[i]); 1764 } 1765 1766 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2 1767 1768 static void ixgbevf_configure_srrctl(struct ixgbevf_adapter *adapter, 1769 struct ixgbevf_ring *ring, int index) 1770 { 1771 struct ixgbe_hw *hw = &adapter->hw; 1772 u32 srrctl; 1773 1774 srrctl = IXGBE_SRRCTL_DROP_EN; 1775 1776 srrctl |= IXGBEVF_RX_HDR_SIZE << IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT; 1777 if (ring_uses_large_buffer(ring)) 1778 srrctl |= IXGBEVF_RXBUFFER_3072 >> IXGBE_SRRCTL_BSIZEPKT_SHIFT; 1779 else 1780 srrctl |= IXGBEVF_RXBUFFER_2048 >> IXGBE_SRRCTL_BSIZEPKT_SHIFT; 1781 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF; 1782 1783 IXGBE_WRITE_REG(hw, IXGBE_VFSRRCTL(index), srrctl); 1784 } 1785 1786 static void ixgbevf_setup_psrtype(struct ixgbevf_adapter *adapter) 1787 { 1788 struct ixgbe_hw *hw = &adapter->hw; 1789 1790 /* PSRTYPE must be initialized in 82599 */ 1791 u32 psrtype = IXGBE_PSRTYPE_TCPHDR | IXGBE_PSRTYPE_UDPHDR | 1792 IXGBE_PSRTYPE_IPV4HDR | IXGBE_PSRTYPE_IPV6HDR | 1793 IXGBE_PSRTYPE_L2HDR; 1794 1795 if (adapter->num_rx_queues > 1) 1796 psrtype |= BIT(29); 1797 1798 IXGBE_WRITE_REG(hw, IXGBE_VFPSRTYPE, psrtype); 1799 } 1800 1801 #define IXGBEVF_MAX_RX_DESC_POLL 10 1802 static void ixgbevf_disable_rx_queue(struct ixgbevf_adapter *adapter, 1803 struct ixgbevf_ring *ring) 1804 { 1805 struct ixgbe_hw *hw = &adapter->hw; 1806 int wait_loop = IXGBEVF_MAX_RX_DESC_POLL; 1807 u32 rxdctl; 1808 u8 reg_idx = ring->reg_idx; 1809 1810 if (IXGBE_REMOVED(hw->hw_addr)) 1811 return; 1812 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx)); 1813 rxdctl &= ~IXGBE_RXDCTL_ENABLE; 1814 1815 /* write value back with RXDCTL.ENABLE bit cleared */ 1816 IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(reg_idx), rxdctl); 1817 1818 /* the hardware may take up to 100us to really disable the Rx queue */ 1819 do { 1820 udelay(10); 1821 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx)); 1822 } while (--wait_loop && (rxdctl & IXGBE_RXDCTL_ENABLE)); 1823 1824 if (!wait_loop) 1825 pr_err("RXDCTL.ENABLE queue %d not cleared while polling\n", 1826 reg_idx); 1827 } 1828 1829 static void ixgbevf_rx_desc_queue_enable(struct ixgbevf_adapter *adapter, 1830 struct ixgbevf_ring *ring) 1831 { 1832 struct ixgbe_hw *hw = &adapter->hw; 1833 int wait_loop = IXGBEVF_MAX_RX_DESC_POLL; 1834 u32 rxdctl; 1835 u8 reg_idx = ring->reg_idx; 1836 1837 if (IXGBE_REMOVED(hw->hw_addr)) 1838 return; 1839 do { 1840 usleep_range(1000, 2000); 1841 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx)); 1842 } while (--wait_loop && !(rxdctl & IXGBE_RXDCTL_ENABLE)); 1843 1844 if (!wait_loop) 1845 pr_err("RXDCTL.ENABLE queue %d not set while polling\n", 1846 reg_idx); 1847 } 1848 1849 /** 1850 * ixgbevf_init_rss_key - Initialize adapter RSS key 1851 * @adapter: device handle 1852 * 1853 * Allocates and initializes the RSS key if it is not allocated. 1854 **/ 1855 static inline int ixgbevf_init_rss_key(struct ixgbevf_adapter *adapter) 1856 { 1857 u32 *rss_key; 1858 1859 if (!adapter->rss_key) { 1860 rss_key = kzalloc(IXGBEVF_RSS_HASH_KEY_SIZE, GFP_KERNEL); 1861 if (unlikely(!rss_key)) 1862 return -ENOMEM; 1863 1864 netdev_rss_key_fill(rss_key, IXGBEVF_RSS_HASH_KEY_SIZE); 1865 adapter->rss_key = rss_key; 1866 } 1867 1868 return 0; 1869 } 1870 1871 static void ixgbevf_setup_vfmrqc(struct ixgbevf_adapter *adapter) 1872 { 1873 struct ixgbe_hw *hw = &adapter->hw; 1874 u32 vfmrqc = 0, vfreta = 0; 1875 u16 rss_i = adapter->num_rx_queues; 1876 u8 i, j; 1877 1878 /* Fill out hash function seeds */ 1879 for (i = 0; i < IXGBEVF_VFRSSRK_REGS; i++) 1880 IXGBE_WRITE_REG(hw, IXGBE_VFRSSRK(i), *(adapter->rss_key + i)); 1881 1882 for (i = 0, j = 0; i < IXGBEVF_X550_VFRETA_SIZE; i++, j++) { 1883 if (j == rss_i) 1884 j = 0; 1885 1886 adapter->rss_indir_tbl[i] = j; 1887 1888 vfreta |= j << (i & 0x3) * 8; 1889 if ((i & 3) == 3) { 1890 IXGBE_WRITE_REG(hw, IXGBE_VFRETA(i >> 2), vfreta); 1891 vfreta = 0; 1892 } 1893 } 1894 1895 /* Perform hash on these packet types */ 1896 vfmrqc |= IXGBE_VFMRQC_RSS_FIELD_IPV4 | 1897 IXGBE_VFMRQC_RSS_FIELD_IPV4_TCP | 1898 IXGBE_VFMRQC_RSS_FIELD_IPV6 | 1899 IXGBE_VFMRQC_RSS_FIELD_IPV6_TCP; 1900 1901 vfmrqc |= IXGBE_VFMRQC_RSSEN; 1902 1903 IXGBE_WRITE_REG(hw, IXGBE_VFMRQC, vfmrqc); 1904 } 1905 1906 static void ixgbevf_configure_rx_ring(struct ixgbevf_adapter *adapter, 1907 struct ixgbevf_ring *ring) 1908 { 1909 struct ixgbe_hw *hw = &adapter->hw; 1910 union ixgbe_adv_rx_desc *rx_desc; 1911 u64 rdba = ring->dma; 1912 u32 rxdctl; 1913 u8 reg_idx = ring->reg_idx; 1914 1915 /* disable queue to avoid issues while updating state */ 1916 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx)); 1917 ixgbevf_disable_rx_queue(adapter, ring); 1918 1919 IXGBE_WRITE_REG(hw, IXGBE_VFRDBAL(reg_idx), rdba & DMA_BIT_MASK(32)); 1920 IXGBE_WRITE_REG(hw, IXGBE_VFRDBAH(reg_idx), rdba >> 32); 1921 IXGBE_WRITE_REG(hw, IXGBE_VFRDLEN(reg_idx), 1922 ring->count * sizeof(union ixgbe_adv_rx_desc)); 1923 1924 #ifndef CONFIG_SPARC 1925 /* enable relaxed ordering */ 1926 IXGBE_WRITE_REG(hw, IXGBE_VFDCA_RXCTRL(reg_idx), 1927 IXGBE_DCA_RXCTRL_DESC_RRO_EN); 1928 #else 1929 IXGBE_WRITE_REG(hw, IXGBE_VFDCA_RXCTRL(reg_idx), 1930 IXGBE_DCA_RXCTRL_DESC_RRO_EN | 1931 IXGBE_DCA_RXCTRL_DATA_WRO_EN); 1932 #endif 1933 1934 /* reset head and tail pointers */ 1935 IXGBE_WRITE_REG(hw, IXGBE_VFRDH(reg_idx), 0); 1936 IXGBE_WRITE_REG(hw, IXGBE_VFRDT(reg_idx), 0); 1937 ring->tail = adapter->io_addr + IXGBE_VFRDT(reg_idx); 1938 1939 /* initialize rx_buffer_info */ 1940 memset(ring->rx_buffer_info, 0, 1941 sizeof(struct ixgbevf_rx_buffer) * ring->count); 1942 1943 /* initialize Rx descriptor 0 */ 1944 rx_desc = IXGBEVF_RX_DESC(ring, 0); 1945 rx_desc->wb.upper.length = 0; 1946 1947 /* reset ntu and ntc to place SW in sync with hardwdare */ 1948 ring->next_to_clean = 0; 1949 ring->next_to_use = 0; 1950 ring->next_to_alloc = 0; 1951 1952 ixgbevf_configure_srrctl(adapter, ring, reg_idx); 1953 1954 /* RXDCTL.RLPML does not work on 82599 */ 1955 if (adapter->hw.mac.type != ixgbe_mac_82599_vf) { 1956 rxdctl &= ~(IXGBE_RXDCTL_RLPMLMASK | 1957 IXGBE_RXDCTL_RLPML_EN); 1958 1959 #if (PAGE_SIZE < 8192) 1960 /* Limit the maximum frame size so we don't overrun the skb */ 1961 if (ring_uses_build_skb(ring) && 1962 !ring_uses_large_buffer(ring)) 1963 rxdctl |= IXGBEVF_MAX_FRAME_BUILD_SKB | 1964 IXGBE_RXDCTL_RLPML_EN; 1965 #endif 1966 } 1967 1968 rxdctl |= IXGBE_RXDCTL_ENABLE | IXGBE_RXDCTL_VME; 1969 IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(reg_idx), rxdctl); 1970 1971 ixgbevf_rx_desc_queue_enable(adapter, ring); 1972 ixgbevf_alloc_rx_buffers(ring, ixgbevf_desc_unused(ring)); 1973 } 1974 1975 static void ixgbevf_set_rx_buffer_len(struct ixgbevf_adapter *adapter, 1976 struct ixgbevf_ring *rx_ring) 1977 { 1978 struct net_device *netdev = adapter->netdev; 1979 unsigned int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN; 1980 1981 /* set build_skb and buffer size flags */ 1982 clear_ring_build_skb_enabled(rx_ring); 1983 clear_ring_uses_large_buffer(rx_ring); 1984 1985 if (adapter->flags & IXGBEVF_FLAGS_LEGACY_RX) 1986 return; 1987 1988 if (PAGE_SIZE < 8192) 1989 if (max_frame > IXGBEVF_MAX_FRAME_BUILD_SKB) 1990 set_ring_uses_large_buffer(rx_ring); 1991 1992 /* 82599 can't rely on RXDCTL.RLPML to restrict the size of the frame */ 1993 if (adapter->hw.mac.type == ixgbe_mac_82599_vf && !ring_uses_large_buffer(rx_ring)) 1994 return; 1995 1996 set_ring_build_skb_enabled(rx_ring); 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 if (err) { 2049 netdev_err(netdev, "VF could not set VLAN %d\n", vid); 2050 2051 /* translate error return types so error makes sense */ 2052 if (err == IXGBE_ERR_MBX) 2053 return -EIO; 2054 2055 if (err == IXGBE_ERR_INVALID_ARGUMENT) 2056 return -EACCES; 2057 } 2058 2059 set_bit(vid, adapter->active_vlans); 2060 2061 return err; 2062 } 2063 2064 static int ixgbevf_vlan_rx_kill_vid(struct net_device *netdev, 2065 __be16 proto, u16 vid) 2066 { 2067 struct ixgbevf_adapter *adapter = netdev_priv(netdev); 2068 struct ixgbe_hw *hw = &adapter->hw; 2069 int err; 2070 2071 spin_lock_bh(&adapter->mbx_lock); 2072 2073 /* remove VID from filter table */ 2074 err = hw->mac.ops.set_vfta(hw, vid, 0, false); 2075 2076 spin_unlock_bh(&adapter->mbx_lock); 2077 2078 if (err) 2079 netdev_err(netdev, "Could not remove VLAN %d\n", vid); 2080 2081 clear_bit(vid, adapter->active_vlans); 2082 2083 return err; 2084 } 2085 2086 static void ixgbevf_restore_vlan(struct ixgbevf_adapter *adapter) 2087 { 2088 u16 vid; 2089 2090 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID) 2091 ixgbevf_vlan_rx_add_vid(adapter->netdev, 2092 htons(ETH_P_8021Q), vid); 2093 } 2094 2095 static int ixgbevf_write_uc_addr_list(struct net_device *netdev) 2096 { 2097 struct ixgbevf_adapter *adapter = netdev_priv(netdev); 2098 struct ixgbe_hw *hw = &adapter->hw; 2099 int count = 0; 2100 2101 if (!netdev_uc_empty(netdev)) { 2102 struct netdev_hw_addr *ha; 2103 2104 netdev_for_each_uc_addr(ha, netdev) { 2105 hw->mac.ops.set_uc_addr(hw, ++count, ha->addr); 2106 udelay(200); 2107 } 2108 } else { 2109 /* If the list is empty then send message to PF driver to 2110 * clear all MAC VLANs on this VF. 2111 */ 2112 hw->mac.ops.set_uc_addr(hw, 0, NULL); 2113 } 2114 2115 return count; 2116 } 2117 2118 /** 2119 * ixgbevf_set_rx_mode - Multicast and unicast set 2120 * @netdev: network interface device structure 2121 * 2122 * The set_rx_method entry point is called whenever the multicast address 2123 * list, unicast address list or the network interface flags are updated. 2124 * This routine is responsible for configuring the hardware for proper 2125 * multicast mode and configuring requested unicast filters. 2126 **/ 2127 static void ixgbevf_set_rx_mode(struct net_device *netdev) 2128 { 2129 struct ixgbevf_adapter *adapter = netdev_priv(netdev); 2130 struct ixgbe_hw *hw = &adapter->hw; 2131 unsigned int flags = netdev->flags; 2132 int xcast_mode; 2133 2134 /* request the most inclusive mode we need */ 2135 if (flags & IFF_PROMISC) 2136 xcast_mode = IXGBEVF_XCAST_MODE_PROMISC; 2137 else if (flags & IFF_ALLMULTI) 2138 xcast_mode = IXGBEVF_XCAST_MODE_ALLMULTI; 2139 else if (flags & (IFF_BROADCAST | IFF_MULTICAST)) 2140 xcast_mode = IXGBEVF_XCAST_MODE_MULTI; 2141 else 2142 xcast_mode = IXGBEVF_XCAST_MODE_NONE; 2143 2144 spin_lock_bh(&adapter->mbx_lock); 2145 2146 hw->mac.ops.update_xcast_mode(hw, xcast_mode); 2147 2148 /* reprogram multicast list */ 2149 hw->mac.ops.update_mc_addr_list(hw, netdev); 2150 2151 ixgbevf_write_uc_addr_list(netdev); 2152 2153 spin_unlock_bh(&adapter->mbx_lock); 2154 } 2155 2156 static void ixgbevf_napi_enable_all(struct ixgbevf_adapter *adapter) 2157 { 2158 int q_idx; 2159 struct ixgbevf_q_vector *q_vector; 2160 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; 2161 2162 for (q_idx = 0; q_idx < q_vectors; q_idx++) { 2163 q_vector = adapter->q_vector[q_idx]; 2164 napi_enable(&q_vector->napi); 2165 } 2166 } 2167 2168 static void ixgbevf_napi_disable_all(struct ixgbevf_adapter *adapter) 2169 { 2170 int q_idx; 2171 struct ixgbevf_q_vector *q_vector; 2172 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; 2173 2174 for (q_idx = 0; q_idx < q_vectors; q_idx++) { 2175 q_vector = adapter->q_vector[q_idx]; 2176 napi_disable(&q_vector->napi); 2177 } 2178 } 2179 2180 static int ixgbevf_configure_dcb(struct ixgbevf_adapter *adapter) 2181 { 2182 struct ixgbe_hw *hw = &adapter->hw; 2183 unsigned int def_q = 0; 2184 unsigned int num_tcs = 0; 2185 unsigned int num_rx_queues = adapter->num_rx_queues; 2186 unsigned int num_tx_queues = adapter->num_tx_queues; 2187 int err; 2188 2189 spin_lock_bh(&adapter->mbx_lock); 2190 2191 /* fetch queue configuration from the PF */ 2192 err = ixgbevf_get_queues(hw, &num_tcs, &def_q); 2193 2194 spin_unlock_bh(&adapter->mbx_lock); 2195 2196 if (err) 2197 return err; 2198 2199 if (num_tcs > 1) { 2200 /* we need only one Tx queue */ 2201 num_tx_queues = 1; 2202 2203 /* update default Tx ring register index */ 2204 adapter->tx_ring[0]->reg_idx = def_q; 2205 2206 /* we need as many queues as traffic classes */ 2207 num_rx_queues = num_tcs; 2208 } 2209 2210 /* if we have a bad config abort request queue reset */ 2211 if ((adapter->num_rx_queues != num_rx_queues) || 2212 (adapter->num_tx_queues != num_tx_queues)) { 2213 /* force mailbox timeout to prevent further messages */ 2214 hw->mbx.timeout = 0; 2215 2216 /* wait for watchdog to come around and bail us out */ 2217 set_bit(__IXGBEVF_QUEUE_RESET_REQUESTED, &adapter->state); 2218 } 2219 2220 return 0; 2221 } 2222 2223 static void ixgbevf_configure(struct ixgbevf_adapter *adapter) 2224 { 2225 ixgbevf_configure_dcb(adapter); 2226 2227 ixgbevf_set_rx_mode(adapter->netdev); 2228 2229 ixgbevf_restore_vlan(adapter); 2230 ixgbevf_ipsec_restore(adapter); 2231 2232 ixgbevf_configure_tx(adapter); 2233 ixgbevf_configure_rx(adapter); 2234 } 2235 2236 static void ixgbevf_save_reset_stats(struct ixgbevf_adapter *adapter) 2237 { 2238 /* Only save pre-reset stats if there are some */ 2239 if (adapter->stats.vfgprc || adapter->stats.vfgptc) { 2240 adapter->stats.saved_reset_vfgprc += adapter->stats.vfgprc - 2241 adapter->stats.base_vfgprc; 2242 adapter->stats.saved_reset_vfgptc += adapter->stats.vfgptc - 2243 adapter->stats.base_vfgptc; 2244 adapter->stats.saved_reset_vfgorc += adapter->stats.vfgorc - 2245 adapter->stats.base_vfgorc; 2246 adapter->stats.saved_reset_vfgotc += adapter->stats.vfgotc - 2247 adapter->stats.base_vfgotc; 2248 adapter->stats.saved_reset_vfmprc += adapter->stats.vfmprc - 2249 adapter->stats.base_vfmprc; 2250 } 2251 } 2252 2253 static void ixgbevf_init_last_counter_stats(struct ixgbevf_adapter *adapter) 2254 { 2255 struct ixgbe_hw *hw = &adapter->hw; 2256 2257 adapter->stats.last_vfgprc = IXGBE_READ_REG(hw, IXGBE_VFGPRC); 2258 adapter->stats.last_vfgorc = IXGBE_READ_REG(hw, IXGBE_VFGORC_LSB); 2259 adapter->stats.last_vfgorc |= 2260 (((u64)(IXGBE_READ_REG(hw, IXGBE_VFGORC_MSB))) << 32); 2261 adapter->stats.last_vfgptc = IXGBE_READ_REG(hw, IXGBE_VFGPTC); 2262 adapter->stats.last_vfgotc = IXGBE_READ_REG(hw, IXGBE_VFGOTC_LSB); 2263 adapter->stats.last_vfgotc |= 2264 (((u64)(IXGBE_READ_REG(hw, IXGBE_VFGOTC_MSB))) << 32); 2265 adapter->stats.last_vfmprc = IXGBE_READ_REG(hw, IXGBE_VFMPRC); 2266 2267 adapter->stats.base_vfgprc = adapter->stats.last_vfgprc; 2268 adapter->stats.base_vfgorc = adapter->stats.last_vfgorc; 2269 adapter->stats.base_vfgptc = adapter->stats.last_vfgptc; 2270 adapter->stats.base_vfgotc = adapter->stats.last_vfgotc; 2271 adapter->stats.base_vfmprc = adapter->stats.last_vfmprc; 2272 } 2273 2274 /** 2275 * ixgbevf_set_features - Set features supported by PF 2276 * @adapter: pointer to the adapter struct 2277 * 2278 * Negotiate with PF supported features and then set pf_features accordingly. 2279 */ 2280 static void ixgbevf_set_features(struct ixgbevf_adapter *adapter) 2281 { 2282 u32 *pf_features = &adapter->pf_features; 2283 struct ixgbe_hw *hw = &adapter->hw; 2284 int err; 2285 2286 err = hw->mac.ops.negotiate_features(hw, pf_features); 2287 if (err && err != -EOPNOTSUPP) 2288 netdev_dbg(adapter->netdev, 2289 "PF feature negotiation failed.\n"); 2290 2291 /* Address also pre API 1.7 cases */ 2292 if (hw->api_version == ixgbe_mbox_api_14) 2293 *pf_features |= IXGBEVF_PF_SUP_IPSEC; 2294 else if (hw->api_version == ixgbe_mbox_api_15) 2295 *pf_features |= IXGBEVF_PF_SUP_ESX_MBX; 2296 } 2297 2298 static void ixgbevf_negotiate_api(struct ixgbevf_adapter *adapter) 2299 { 2300 struct ixgbe_hw *hw = &adapter->hw; 2301 static const int api[] = { 2302 ixgbe_mbox_api_17, 2303 ixgbe_mbox_api_16, 2304 ixgbe_mbox_api_15, 2305 ixgbe_mbox_api_14, 2306 ixgbe_mbox_api_13, 2307 ixgbe_mbox_api_12, 2308 ixgbe_mbox_api_11, 2309 ixgbe_mbox_api_10, 2310 ixgbe_mbox_api_unknown 2311 }; 2312 int err, idx = 0; 2313 2314 spin_lock_bh(&adapter->mbx_lock); 2315 2316 while (api[idx] != ixgbe_mbox_api_unknown) { 2317 err = hw->mac.ops.negotiate_api_version(hw, api[idx]); 2318 if (!err) 2319 break; 2320 idx++; 2321 } 2322 2323 ixgbevf_set_features(adapter); 2324 2325 if (adapter->pf_features & IXGBEVF_PF_SUP_ESX_MBX) { 2326 hw->mbx.ops.init_params(hw); 2327 memcpy(&hw->mbx.ops, &ixgbevf_mbx_ops, 2328 sizeof(struct ixgbe_mbx_operations)); 2329 } 2330 2331 spin_unlock_bh(&adapter->mbx_lock); 2332 } 2333 2334 static void ixgbevf_up_complete(struct ixgbevf_adapter *adapter) 2335 { 2336 struct net_device *netdev = adapter->netdev; 2337 struct pci_dev *pdev = adapter->pdev; 2338 struct ixgbe_hw *hw = &adapter->hw; 2339 bool state; 2340 2341 ixgbevf_configure_msix(adapter); 2342 2343 spin_lock_bh(&adapter->mbx_lock); 2344 2345 if (is_valid_ether_addr(hw->mac.addr)) 2346 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0); 2347 else 2348 hw->mac.ops.set_rar(hw, 0, hw->mac.perm_addr, 0); 2349 2350 spin_unlock_bh(&adapter->mbx_lock); 2351 2352 state = adapter->link_state; 2353 hw->mac.ops.get_link_state(hw, &adapter->link_state); 2354 if (state && state != adapter->link_state) 2355 dev_info(&pdev->dev, "VF is administratively disabled\n"); 2356 2357 smp_mb__before_atomic(); 2358 clear_bit(__IXGBEVF_DOWN, &adapter->state); 2359 ixgbevf_napi_enable_all(adapter); 2360 2361 /* clear any pending interrupts, may auto mask */ 2362 IXGBE_READ_REG(hw, IXGBE_VTEICR); 2363 ixgbevf_irq_enable(adapter); 2364 2365 /* enable transmits */ 2366 netif_tx_start_all_queues(netdev); 2367 2368 ixgbevf_save_reset_stats(adapter); 2369 ixgbevf_init_last_counter_stats(adapter); 2370 2371 hw->mac.get_link_status = 1; 2372 mod_timer(&adapter->service_timer, jiffies); 2373 } 2374 2375 void ixgbevf_up(struct ixgbevf_adapter *adapter) 2376 { 2377 ixgbevf_configure(adapter); 2378 2379 ixgbevf_up_complete(adapter); 2380 } 2381 2382 /** 2383 * ixgbevf_clean_rx_ring - Free Rx Buffers per Queue 2384 * @rx_ring: ring to free buffers from 2385 **/ 2386 static void ixgbevf_clean_rx_ring(struct ixgbevf_ring *rx_ring) 2387 { 2388 u16 i = rx_ring->next_to_clean; 2389 2390 /* Free Rx ring sk_buff */ 2391 if (rx_ring->skb) { 2392 dev_kfree_skb(rx_ring->skb); 2393 rx_ring->skb = NULL; 2394 } 2395 2396 /* Free all the Rx ring pages */ 2397 while (i != rx_ring->next_to_alloc) { 2398 struct ixgbevf_rx_buffer *rx_buffer; 2399 2400 rx_buffer = &rx_ring->rx_buffer_info[i]; 2401 2402 /* Invalidate cache lines that may have been written to by 2403 * device so that we avoid corrupting memory. 2404 */ 2405 dma_sync_single_range_for_cpu(rx_ring->dev, 2406 rx_buffer->dma, 2407 rx_buffer->page_offset, 2408 ixgbevf_rx_bufsz(rx_ring), 2409 DMA_FROM_DEVICE); 2410 2411 /* free resources associated with mapping */ 2412 dma_unmap_page_attrs(rx_ring->dev, 2413 rx_buffer->dma, 2414 ixgbevf_rx_pg_size(rx_ring), 2415 DMA_FROM_DEVICE, 2416 IXGBEVF_RX_DMA_ATTR); 2417 2418 __page_frag_cache_drain(rx_buffer->page, 2419 rx_buffer->pagecnt_bias); 2420 2421 i++; 2422 if (i == rx_ring->count) 2423 i = 0; 2424 } 2425 2426 rx_ring->next_to_alloc = 0; 2427 rx_ring->next_to_clean = 0; 2428 rx_ring->next_to_use = 0; 2429 } 2430 2431 /** 2432 * ixgbevf_clean_tx_ring - Free Tx Buffers 2433 * @tx_ring: ring to be cleaned 2434 **/ 2435 static void ixgbevf_clean_tx_ring(struct ixgbevf_ring *tx_ring) 2436 { 2437 u16 i = tx_ring->next_to_clean; 2438 struct ixgbevf_tx_buffer *tx_buffer = &tx_ring->tx_buffer_info[i]; 2439 2440 while (i != tx_ring->next_to_use) { 2441 union ixgbe_adv_tx_desc *eop_desc, *tx_desc; 2442 2443 /* Free all the Tx ring sk_buffs */ 2444 if (ring_is_xdp(tx_ring)) 2445 page_frag_free(tx_buffer->data); 2446 else 2447 dev_kfree_skb_any(tx_buffer->skb); 2448 2449 /* unmap skb header data */ 2450 dma_unmap_single(tx_ring->dev, 2451 dma_unmap_addr(tx_buffer, dma), 2452 dma_unmap_len(tx_buffer, len), 2453 DMA_TO_DEVICE); 2454 2455 /* check for eop_desc to determine the end of the packet */ 2456 eop_desc = tx_buffer->next_to_watch; 2457 tx_desc = IXGBEVF_TX_DESC(tx_ring, i); 2458 2459 /* unmap remaining buffers */ 2460 while (tx_desc != eop_desc) { 2461 tx_buffer++; 2462 tx_desc++; 2463 i++; 2464 if (unlikely(i == tx_ring->count)) { 2465 i = 0; 2466 tx_buffer = tx_ring->tx_buffer_info; 2467 tx_desc = IXGBEVF_TX_DESC(tx_ring, 0); 2468 } 2469 2470 /* unmap any remaining paged data */ 2471 if (dma_unmap_len(tx_buffer, len)) 2472 dma_unmap_page(tx_ring->dev, 2473 dma_unmap_addr(tx_buffer, dma), 2474 dma_unmap_len(tx_buffer, len), 2475 DMA_TO_DEVICE); 2476 } 2477 2478 /* move us one more past the eop_desc for start of next pkt */ 2479 tx_buffer++; 2480 i++; 2481 if (unlikely(i == tx_ring->count)) { 2482 i = 0; 2483 tx_buffer = tx_ring->tx_buffer_info; 2484 } 2485 } 2486 2487 /* reset next_to_use and next_to_clean */ 2488 tx_ring->next_to_use = 0; 2489 tx_ring->next_to_clean = 0; 2490 2491 } 2492 2493 /** 2494 * ixgbevf_clean_all_rx_rings - Free Rx Buffers for all queues 2495 * @adapter: board private structure 2496 **/ 2497 static void ixgbevf_clean_all_rx_rings(struct ixgbevf_adapter *adapter) 2498 { 2499 int i; 2500 2501 for (i = 0; i < adapter->num_rx_queues; i++) 2502 ixgbevf_clean_rx_ring(adapter->rx_ring[i]); 2503 } 2504 2505 /** 2506 * ixgbevf_clean_all_tx_rings - Free Tx Buffers for all queues 2507 * @adapter: board private structure 2508 **/ 2509 static void ixgbevf_clean_all_tx_rings(struct ixgbevf_adapter *adapter) 2510 { 2511 int i; 2512 2513 for (i = 0; i < adapter->num_tx_queues; i++) 2514 ixgbevf_clean_tx_ring(adapter->tx_ring[i]); 2515 for (i = 0; i < adapter->num_xdp_queues; i++) 2516 ixgbevf_clean_tx_ring(adapter->xdp_ring[i]); 2517 } 2518 2519 void ixgbevf_down(struct ixgbevf_adapter *adapter) 2520 { 2521 struct net_device *netdev = adapter->netdev; 2522 struct ixgbe_hw *hw = &adapter->hw; 2523 int i; 2524 2525 /* signal that we are down to the interrupt handler */ 2526 if (test_and_set_bit(__IXGBEVF_DOWN, &adapter->state)) 2527 return; /* do nothing if already down */ 2528 2529 /* disable all enabled Rx queues */ 2530 for (i = 0; i < adapter->num_rx_queues; i++) 2531 ixgbevf_disable_rx_queue(adapter, adapter->rx_ring[i]); 2532 2533 usleep_range(10000, 20000); 2534 2535 netif_tx_stop_all_queues(netdev); 2536 2537 /* call carrier off first to avoid false dev_watchdog timeouts */ 2538 netif_carrier_off(netdev); 2539 netif_tx_disable(netdev); 2540 2541 ixgbevf_irq_disable(adapter); 2542 2543 ixgbevf_napi_disable_all(adapter); 2544 2545 timer_delete_sync(&adapter->service_timer); 2546 2547 /* disable transmits in the hardware now that interrupts are off */ 2548 for (i = 0; i < adapter->num_tx_queues; i++) { 2549 u8 reg_idx = adapter->tx_ring[i]->reg_idx; 2550 2551 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(reg_idx), 2552 IXGBE_TXDCTL_SWFLSH); 2553 } 2554 2555 for (i = 0; i < adapter->num_xdp_queues; i++) { 2556 u8 reg_idx = adapter->xdp_ring[i]->reg_idx; 2557 2558 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(reg_idx), 2559 IXGBE_TXDCTL_SWFLSH); 2560 } 2561 2562 if (!pci_channel_offline(adapter->pdev)) 2563 ixgbevf_reset(adapter); 2564 2565 ixgbevf_clean_all_tx_rings(adapter); 2566 ixgbevf_clean_all_rx_rings(adapter); 2567 } 2568 2569 void ixgbevf_reinit_locked(struct ixgbevf_adapter *adapter) 2570 { 2571 while (test_and_set_bit(__IXGBEVF_RESETTING, &adapter->state)) 2572 msleep(1); 2573 2574 ixgbevf_down(adapter); 2575 pci_set_master(adapter->pdev); 2576 ixgbevf_up(adapter); 2577 2578 clear_bit(__IXGBEVF_RESETTING, &adapter->state); 2579 } 2580 2581 void ixgbevf_reset(struct ixgbevf_adapter *adapter) 2582 { 2583 struct ixgbe_hw *hw = &adapter->hw; 2584 struct net_device *netdev = adapter->netdev; 2585 2586 if (hw->mac.ops.reset_hw(hw)) { 2587 hw_dbg(hw, "PF still resetting\n"); 2588 } else { 2589 hw->mac.ops.init_hw(hw); 2590 ixgbevf_negotiate_api(adapter); 2591 } 2592 2593 if (is_valid_ether_addr(adapter->hw.mac.addr)) { 2594 eth_hw_addr_set(netdev, adapter->hw.mac.addr); 2595 ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr); 2596 } 2597 2598 adapter->last_reset = jiffies; 2599 } 2600 2601 static int ixgbevf_acquire_msix_vectors(struct ixgbevf_adapter *adapter, 2602 int vectors) 2603 { 2604 int vector_threshold; 2605 2606 /* We'll want at least 2 (vector_threshold): 2607 * 1) TxQ[0] + RxQ[0] handler 2608 * 2) Other (Link Status Change, etc.) 2609 */ 2610 vector_threshold = MIN_MSIX_COUNT; 2611 2612 /* The more we get, the more we will assign to Tx/Rx Cleanup 2613 * for the separate queues...where Rx Cleanup >= Tx Cleanup. 2614 * Right now, we simply care about how many we'll get; we'll 2615 * set them up later while requesting irq's. 2616 */ 2617 vectors = pci_enable_msix_range(adapter->pdev, adapter->msix_entries, 2618 vector_threshold, vectors); 2619 2620 if (vectors < 0) { 2621 dev_err(&adapter->pdev->dev, 2622 "Unable to allocate MSI-X interrupts\n"); 2623 kfree(adapter->msix_entries); 2624 adapter->msix_entries = NULL; 2625 return vectors; 2626 } 2627 2628 /* Adjust for only the vectors we'll use, which is minimum 2629 * of max_msix_q_vectors + NON_Q_VECTORS, or the number of 2630 * vectors we were allocated. 2631 */ 2632 adapter->num_msix_vectors = vectors; 2633 2634 return 0; 2635 } 2636 2637 /** 2638 * ixgbevf_set_num_queues - Allocate queues for device, feature dependent 2639 * @adapter: board private structure to initialize 2640 * 2641 * This is the top level queue allocation routine. The order here is very 2642 * important, starting with the "most" number of features turned on at once, 2643 * and ending with the smallest set of features. This way large combinations 2644 * can be allocated if they're turned on, and smaller combinations are the 2645 * fall through conditions. 2646 * 2647 **/ 2648 static void ixgbevf_set_num_queues(struct ixgbevf_adapter *adapter) 2649 { 2650 struct ixgbe_hw *hw = &adapter->hw; 2651 unsigned int def_q = 0; 2652 unsigned int num_tcs = 0; 2653 int err; 2654 2655 /* Start with base case */ 2656 adapter->num_rx_queues = 1; 2657 adapter->num_tx_queues = 1; 2658 adapter->num_xdp_queues = 0; 2659 2660 spin_lock_bh(&adapter->mbx_lock); 2661 2662 /* fetch queue configuration from the PF */ 2663 err = ixgbevf_get_queues(hw, &num_tcs, &def_q); 2664 2665 spin_unlock_bh(&adapter->mbx_lock); 2666 2667 if (err) 2668 return; 2669 2670 /* we need as many queues as traffic classes */ 2671 if (num_tcs > 1) { 2672 adapter->num_rx_queues = num_tcs; 2673 } else { 2674 u16 rss = min_t(u16, num_online_cpus(), IXGBEVF_MAX_RSS_QUEUES); 2675 2676 switch (hw->api_version) { 2677 case ixgbe_mbox_api_11: 2678 case ixgbe_mbox_api_12: 2679 case ixgbe_mbox_api_13: 2680 case ixgbe_mbox_api_14: 2681 case ixgbe_mbox_api_15: 2682 case ixgbe_mbox_api_16: 2683 case ixgbe_mbox_api_17: 2684 if (adapter->xdp_prog && 2685 hw->mac.max_tx_queues == rss) 2686 rss = rss > 3 ? 2 : 1; 2687 2688 adapter->num_rx_queues = rss; 2689 adapter->num_tx_queues = rss; 2690 adapter->num_xdp_queues = adapter->xdp_prog ? rss : 0; 2691 break; 2692 default: 2693 break; 2694 } 2695 } 2696 } 2697 2698 /** 2699 * ixgbevf_set_interrupt_capability - set MSI-X or FAIL if not supported 2700 * @adapter: board private structure to initialize 2701 * 2702 * Attempt to configure the interrupts using the best available 2703 * capabilities of the hardware and the kernel. 2704 **/ 2705 static int ixgbevf_set_interrupt_capability(struct ixgbevf_adapter *adapter) 2706 { 2707 int vector, v_budget; 2708 2709 /* It's easy to be greedy for MSI-X vectors, but it really 2710 * doesn't do us much good if we have a lot more vectors 2711 * than CPU's. So let's be conservative and only ask for 2712 * (roughly) the same number of vectors as there are CPU's. 2713 * The default is to use pairs of vectors. 2714 */ 2715 v_budget = max(adapter->num_rx_queues, adapter->num_tx_queues); 2716 v_budget = min_t(int, v_budget, num_online_cpus()); 2717 v_budget += NON_Q_VECTORS; 2718 2719 adapter->msix_entries = kzalloc_objs(struct msix_entry, v_budget); 2720 if (!adapter->msix_entries) 2721 return -ENOMEM; 2722 2723 for (vector = 0; vector < v_budget; vector++) 2724 adapter->msix_entries[vector].entry = vector; 2725 2726 /* A failure in MSI-X entry allocation isn't fatal, but the VF driver 2727 * does not support any other modes, so we will simply fail here. Note 2728 * that we clean up the msix_entries pointer else-where. 2729 */ 2730 return ixgbevf_acquire_msix_vectors(adapter, v_budget); 2731 } 2732 2733 static void ixgbevf_add_ring(struct ixgbevf_ring *ring, 2734 struct ixgbevf_ring_container *head) 2735 { 2736 ring->next = head->ring; 2737 head->ring = ring; 2738 head->count++; 2739 } 2740 2741 /** 2742 * ixgbevf_alloc_q_vector - Allocate memory for a single interrupt vector 2743 * @adapter: board private structure to initialize 2744 * @v_idx: index of vector in adapter struct 2745 * @txr_count: number of Tx rings for q vector 2746 * @txr_idx: index of first Tx ring to assign 2747 * @xdp_count: total number of XDP rings to allocate 2748 * @xdp_idx: index of first XDP ring to allocate 2749 * @rxr_count: number of Rx rings for q vector 2750 * @rxr_idx: index of first Rx ring to assign 2751 * 2752 * We allocate one q_vector. If allocation fails we return -ENOMEM. 2753 **/ 2754 static int ixgbevf_alloc_q_vector(struct ixgbevf_adapter *adapter, int v_idx, 2755 int txr_count, int txr_idx, 2756 int xdp_count, int xdp_idx, 2757 int rxr_count, int rxr_idx) 2758 { 2759 struct ixgbevf_q_vector *q_vector; 2760 int reg_idx = txr_idx + xdp_idx; 2761 struct ixgbevf_ring *ring; 2762 int ring_count, size; 2763 2764 ring_count = txr_count + xdp_count + rxr_count; 2765 size = sizeof(*q_vector) + (sizeof(*ring) * ring_count); 2766 2767 /* allocate q_vector and rings */ 2768 q_vector = kzalloc(size, GFP_KERNEL); 2769 if (!q_vector) 2770 return -ENOMEM; 2771 2772 /* initialize NAPI */ 2773 netif_napi_add(adapter->netdev, &q_vector->napi, ixgbevf_poll); 2774 2775 /* tie q_vector and adapter together */ 2776 adapter->q_vector[v_idx] = q_vector; 2777 q_vector->adapter = adapter; 2778 q_vector->v_idx = v_idx; 2779 2780 /* initialize pointer to rings */ 2781 ring = q_vector->ring; 2782 2783 while (txr_count) { 2784 /* assign generic ring traits */ 2785 ring->dev = &adapter->pdev->dev; 2786 ring->netdev = adapter->netdev; 2787 2788 /* configure backlink on ring */ 2789 ring->q_vector = q_vector; 2790 2791 /* update q_vector Tx values */ 2792 ixgbevf_add_ring(ring, &q_vector->tx); 2793 2794 /* apply Tx specific ring traits */ 2795 ring->count = adapter->tx_ring_count; 2796 ring->queue_index = txr_idx; 2797 ring->reg_idx = reg_idx; 2798 2799 /* assign ring to adapter */ 2800 adapter->tx_ring[txr_idx] = ring; 2801 2802 /* update count and index */ 2803 txr_count--; 2804 txr_idx++; 2805 reg_idx++; 2806 2807 /* push pointer to next ring */ 2808 ring++; 2809 } 2810 2811 while (xdp_count) { 2812 /* assign generic ring traits */ 2813 ring->dev = &adapter->pdev->dev; 2814 ring->netdev = adapter->netdev; 2815 2816 /* configure backlink on ring */ 2817 ring->q_vector = q_vector; 2818 2819 /* update q_vector Tx values */ 2820 ixgbevf_add_ring(ring, &q_vector->tx); 2821 2822 /* apply Tx specific ring traits */ 2823 ring->count = adapter->tx_ring_count; 2824 ring->queue_index = xdp_idx; 2825 ring->reg_idx = reg_idx; 2826 set_ring_xdp(ring); 2827 2828 /* assign ring to adapter */ 2829 adapter->xdp_ring[xdp_idx] = ring; 2830 2831 /* update count and index */ 2832 xdp_count--; 2833 xdp_idx++; 2834 reg_idx++; 2835 2836 /* push pointer to next ring */ 2837 ring++; 2838 } 2839 2840 while (rxr_count) { 2841 /* assign generic ring traits */ 2842 ring->dev = &adapter->pdev->dev; 2843 ring->netdev = adapter->netdev; 2844 2845 /* configure backlink on ring */ 2846 ring->q_vector = q_vector; 2847 2848 /* update q_vector Rx values */ 2849 ixgbevf_add_ring(ring, &q_vector->rx); 2850 2851 /* apply Rx specific ring traits */ 2852 ring->count = adapter->rx_ring_count; 2853 ring->queue_index = rxr_idx; 2854 ring->reg_idx = rxr_idx; 2855 2856 /* assign ring to adapter */ 2857 adapter->rx_ring[rxr_idx] = ring; 2858 2859 /* update count and index */ 2860 rxr_count--; 2861 rxr_idx++; 2862 2863 /* push pointer to next ring */ 2864 ring++; 2865 } 2866 2867 return 0; 2868 } 2869 2870 /** 2871 * ixgbevf_free_q_vector - Free memory allocated for specific interrupt vector 2872 * @adapter: board private structure to initialize 2873 * @v_idx: index of vector in adapter struct 2874 * 2875 * This function frees the memory allocated to the q_vector. In addition if 2876 * NAPI is enabled it will delete any references to the NAPI struct prior 2877 * to freeing the q_vector. 2878 **/ 2879 static void ixgbevf_free_q_vector(struct ixgbevf_adapter *adapter, int v_idx) 2880 { 2881 struct ixgbevf_q_vector *q_vector = adapter->q_vector[v_idx]; 2882 struct ixgbevf_ring *ring; 2883 2884 ixgbevf_for_each_ring(ring, q_vector->tx) { 2885 if (ring_is_xdp(ring)) 2886 adapter->xdp_ring[ring->queue_index] = NULL; 2887 else 2888 adapter->tx_ring[ring->queue_index] = NULL; 2889 } 2890 2891 ixgbevf_for_each_ring(ring, q_vector->rx) 2892 adapter->rx_ring[ring->queue_index] = NULL; 2893 2894 adapter->q_vector[v_idx] = NULL; 2895 netif_napi_del(&q_vector->napi); 2896 2897 /* ixgbevf_get_stats() might access the rings on this vector, 2898 * we must wait a grace period before freeing it. 2899 */ 2900 kfree_rcu(q_vector, rcu); 2901 } 2902 2903 /** 2904 * ixgbevf_alloc_q_vectors - Allocate memory for interrupt vectors 2905 * @adapter: board private structure to initialize 2906 * 2907 * We allocate one q_vector per queue interrupt. If allocation fails we 2908 * return -ENOMEM. 2909 **/ 2910 static int ixgbevf_alloc_q_vectors(struct ixgbevf_adapter *adapter) 2911 { 2912 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; 2913 int rxr_remaining = adapter->num_rx_queues; 2914 int txr_remaining = adapter->num_tx_queues; 2915 int xdp_remaining = adapter->num_xdp_queues; 2916 int rxr_idx = 0, txr_idx = 0, xdp_idx = 0, v_idx = 0; 2917 int err; 2918 2919 if (q_vectors >= (rxr_remaining + txr_remaining + xdp_remaining)) { 2920 for (; rxr_remaining; v_idx++, q_vectors--) { 2921 int rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors); 2922 2923 err = ixgbevf_alloc_q_vector(adapter, v_idx, 2924 0, 0, 0, 0, rqpv, rxr_idx); 2925 if (err) 2926 goto err_out; 2927 2928 /* update counts and index */ 2929 rxr_remaining -= rqpv; 2930 rxr_idx += rqpv; 2931 } 2932 } 2933 2934 for (; q_vectors; v_idx++, q_vectors--) { 2935 int rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors); 2936 int tqpv = DIV_ROUND_UP(txr_remaining, q_vectors); 2937 int xqpv = DIV_ROUND_UP(xdp_remaining, q_vectors); 2938 2939 err = ixgbevf_alloc_q_vector(adapter, v_idx, 2940 tqpv, txr_idx, 2941 xqpv, xdp_idx, 2942 rqpv, rxr_idx); 2943 2944 if (err) 2945 goto err_out; 2946 2947 /* update counts and index */ 2948 rxr_remaining -= rqpv; 2949 rxr_idx += rqpv; 2950 txr_remaining -= tqpv; 2951 txr_idx += tqpv; 2952 xdp_remaining -= xqpv; 2953 xdp_idx += xqpv; 2954 } 2955 2956 return 0; 2957 2958 err_out: 2959 while (v_idx) { 2960 v_idx--; 2961 ixgbevf_free_q_vector(adapter, v_idx); 2962 } 2963 2964 return -ENOMEM; 2965 } 2966 2967 /** 2968 * ixgbevf_free_q_vectors - Free memory allocated for interrupt vectors 2969 * @adapter: board private structure to initialize 2970 * 2971 * This function frees the memory allocated to the q_vectors. In addition if 2972 * NAPI is enabled it will delete any references to the NAPI struct prior 2973 * to freeing the q_vector. 2974 **/ 2975 static void ixgbevf_free_q_vectors(struct ixgbevf_adapter *adapter) 2976 { 2977 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; 2978 2979 while (q_vectors) { 2980 q_vectors--; 2981 ixgbevf_free_q_vector(adapter, q_vectors); 2982 } 2983 } 2984 2985 /** 2986 * ixgbevf_reset_interrupt_capability - Reset MSIX setup 2987 * @adapter: board private structure 2988 * 2989 **/ 2990 static void ixgbevf_reset_interrupt_capability(struct ixgbevf_adapter *adapter) 2991 { 2992 if (!adapter->msix_entries) 2993 return; 2994 2995 pci_disable_msix(adapter->pdev); 2996 kfree(adapter->msix_entries); 2997 adapter->msix_entries = NULL; 2998 } 2999 3000 /** 3001 * ixgbevf_init_interrupt_scheme - Determine if MSIX is supported and init 3002 * @adapter: board private structure to initialize 3003 * 3004 **/ 3005 static int ixgbevf_init_interrupt_scheme(struct ixgbevf_adapter *adapter) 3006 { 3007 int err; 3008 3009 /* Number of supported queues */ 3010 ixgbevf_set_num_queues(adapter); 3011 3012 err = ixgbevf_set_interrupt_capability(adapter); 3013 if (err) { 3014 hw_dbg(&adapter->hw, 3015 "Unable to setup interrupt capabilities\n"); 3016 goto err_set_interrupt; 3017 } 3018 3019 err = ixgbevf_alloc_q_vectors(adapter); 3020 if (err) { 3021 hw_dbg(&adapter->hw, "Unable to allocate memory for queue vectors\n"); 3022 goto err_alloc_q_vectors; 3023 } 3024 3025 hw_dbg(&adapter->hw, "Multiqueue %s: Rx Queue count = %u, Tx Queue count = %u XDP Queue count %u\n", 3026 (adapter->num_rx_queues > 1) ? "Enabled" : "Disabled", 3027 adapter->num_rx_queues, adapter->num_tx_queues, 3028 adapter->num_xdp_queues); 3029 3030 set_bit(__IXGBEVF_DOWN, &adapter->state); 3031 3032 return 0; 3033 err_alloc_q_vectors: 3034 ixgbevf_reset_interrupt_capability(adapter); 3035 err_set_interrupt: 3036 return err; 3037 } 3038 3039 /** 3040 * ixgbevf_clear_interrupt_scheme - Clear the current interrupt scheme settings 3041 * @adapter: board private structure to clear interrupt scheme on 3042 * 3043 * We go through and clear interrupt specific resources and reset the structure 3044 * to pre-load conditions 3045 **/ 3046 static void ixgbevf_clear_interrupt_scheme(struct ixgbevf_adapter *adapter) 3047 { 3048 adapter->num_tx_queues = 0; 3049 adapter->num_xdp_queues = 0; 3050 adapter->num_rx_queues = 0; 3051 3052 ixgbevf_free_q_vectors(adapter); 3053 ixgbevf_reset_interrupt_capability(adapter); 3054 } 3055 3056 /** 3057 * ixgbevf_sw_init - Initialize general software structures 3058 * @adapter: board private structure to initialize 3059 * 3060 * ixgbevf_sw_init initializes the Adapter private data structure. 3061 * Fields are initialized based on PCI device information and 3062 * OS network device settings (MTU size). 3063 **/ 3064 static int ixgbevf_sw_init(struct ixgbevf_adapter *adapter) 3065 { 3066 struct ixgbe_hw *hw = &adapter->hw; 3067 struct pci_dev *pdev = adapter->pdev; 3068 struct net_device *netdev = adapter->netdev; 3069 int err; 3070 3071 /* PCI config space info */ 3072 hw->vendor_id = pdev->vendor; 3073 hw->device_id = pdev->device; 3074 hw->revision_id = pdev->revision; 3075 hw->subsystem_vendor_id = pdev->subsystem_vendor; 3076 hw->subsystem_device_id = pdev->subsystem_device; 3077 3078 hw->mbx.ops.init_params(hw); 3079 3080 if (hw->mac.type >= ixgbe_mac_X550_vf) { 3081 err = ixgbevf_init_rss_key(adapter); 3082 if (err) 3083 goto out; 3084 } 3085 3086 /* assume legacy case in which PF would only give VF 2 queues */ 3087 hw->mac.max_tx_queues = 2; 3088 hw->mac.max_rx_queues = 2; 3089 3090 /* lock to protect mailbox accesses */ 3091 spin_lock_init(&adapter->mbx_lock); 3092 3093 err = hw->mac.ops.reset_hw(hw); 3094 if (err) { 3095 dev_info(&pdev->dev, 3096 "PF still in reset state. Is the PF interface up?\n"); 3097 } else { 3098 err = hw->mac.ops.init_hw(hw); 3099 if (err) { 3100 pr_err("init_shared_code failed: %d\n", err); 3101 goto out; 3102 } 3103 ixgbevf_negotiate_api(adapter); 3104 err = hw->mac.ops.get_mac_addr(hw, hw->mac.addr); 3105 if (err) 3106 dev_info(&pdev->dev, "Error reading MAC address\n"); 3107 else if (is_zero_ether_addr(adapter->hw.mac.addr)) 3108 dev_info(&pdev->dev, 3109 "MAC address not assigned by administrator.\n"); 3110 eth_hw_addr_set(netdev, hw->mac.addr); 3111 } 3112 3113 if (!is_valid_ether_addr(netdev->dev_addr)) { 3114 dev_info(&pdev->dev, "Assigning random MAC address\n"); 3115 eth_hw_addr_random(netdev); 3116 ether_addr_copy(hw->mac.addr, netdev->dev_addr); 3117 ether_addr_copy(hw->mac.perm_addr, netdev->dev_addr); 3118 } 3119 3120 /* Enable dynamic interrupt throttling rates */ 3121 adapter->rx_itr_setting = 1; 3122 adapter->tx_itr_setting = 1; 3123 3124 /* set default ring sizes */ 3125 adapter->tx_ring_count = IXGBEVF_DEFAULT_TXD; 3126 adapter->rx_ring_count = IXGBEVF_DEFAULT_RXD; 3127 3128 adapter->link_state = true; 3129 3130 set_bit(__IXGBEVF_DOWN, &adapter->state); 3131 return 0; 3132 3133 out: 3134 return err; 3135 } 3136 3137 #define UPDATE_VF_COUNTER_32bit(reg, last_counter, counter) \ 3138 { \ 3139 u32 current_counter = IXGBE_READ_REG(hw, reg); \ 3140 if (current_counter < last_counter) \ 3141 counter += 0x100000000LL; \ 3142 last_counter = current_counter; \ 3143 counter &= 0xFFFFFFFF00000000LL; \ 3144 counter |= current_counter; \ 3145 } 3146 3147 #define UPDATE_VF_COUNTER_36bit(reg_lsb, reg_msb, last_counter, counter) \ 3148 { \ 3149 u64 current_counter_lsb = IXGBE_READ_REG(hw, reg_lsb); \ 3150 u64 current_counter_msb = IXGBE_READ_REG(hw, reg_msb); \ 3151 u64 current_counter = (current_counter_msb << 32) | \ 3152 current_counter_lsb; \ 3153 if (current_counter < last_counter) \ 3154 counter += 0x1000000000LL; \ 3155 last_counter = current_counter; \ 3156 counter &= 0xFFFFFFF000000000LL; \ 3157 counter |= current_counter; \ 3158 } 3159 /** 3160 * ixgbevf_update_stats - Update the board statistics counters. 3161 * @adapter: board private structure 3162 **/ 3163 void ixgbevf_update_stats(struct ixgbevf_adapter *adapter) 3164 { 3165 struct ixgbe_hw *hw = &adapter->hw; 3166 u64 alloc_rx_page_failed = 0, alloc_rx_buff_failed = 0; 3167 u64 alloc_rx_page = 0, hw_csum_rx_error = 0; 3168 int i; 3169 3170 if (test_bit(__IXGBEVF_DOWN, &adapter->state) || 3171 test_bit(__IXGBEVF_RESETTING, &adapter->state)) 3172 return; 3173 3174 UPDATE_VF_COUNTER_32bit(IXGBE_VFGPRC, adapter->stats.last_vfgprc, 3175 adapter->stats.vfgprc); 3176 UPDATE_VF_COUNTER_32bit(IXGBE_VFGPTC, adapter->stats.last_vfgptc, 3177 adapter->stats.vfgptc); 3178 UPDATE_VF_COUNTER_36bit(IXGBE_VFGORC_LSB, IXGBE_VFGORC_MSB, 3179 adapter->stats.last_vfgorc, 3180 adapter->stats.vfgorc); 3181 UPDATE_VF_COUNTER_36bit(IXGBE_VFGOTC_LSB, IXGBE_VFGOTC_MSB, 3182 adapter->stats.last_vfgotc, 3183 adapter->stats.vfgotc); 3184 UPDATE_VF_COUNTER_32bit(IXGBE_VFMPRC, adapter->stats.last_vfmprc, 3185 adapter->stats.vfmprc); 3186 3187 for (i = 0; i < adapter->num_rx_queues; i++) { 3188 struct ixgbevf_ring *rx_ring = adapter->rx_ring[i]; 3189 3190 hw_csum_rx_error += rx_ring->rx_stats.csum_err; 3191 alloc_rx_page_failed += rx_ring->rx_stats.alloc_rx_page_failed; 3192 alloc_rx_buff_failed += rx_ring->rx_stats.alloc_rx_buff_failed; 3193 alloc_rx_page += rx_ring->rx_stats.alloc_rx_page; 3194 } 3195 3196 adapter->hw_csum_rx_error = hw_csum_rx_error; 3197 adapter->alloc_rx_page_failed = alloc_rx_page_failed; 3198 adapter->alloc_rx_buff_failed = alloc_rx_buff_failed; 3199 adapter->alloc_rx_page = alloc_rx_page; 3200 } 3201 3202 /** 3203 * ixgbevf_service_timer - Timer Call-back 3204 * @t: pointer to timer_list struct 3205 **/ 3206 static void ixgbevf_service_timer(struct timer_list *t) 3207 { 3208 struct ixgbevf_adapter *adapter = timer_container_of(adapter, t, 3209 service_timer); 3210 3211 /* Reset the timer */ 3212 mod_timer(&adapter->service_timer, (HZ * 2) + jiffies); 3213 3214 ixgbevf_service_event_schedule(adapter); 3215 } 3216 3217 static void ixgbevf_reset_subtask(struct ixgbevf_adapter *adapter) 3218 { 3219 if (!test_and_clear_bit(__IXGBEVF_RESET_REQUESTED, &adapter->state)) 3220 return; 3221 3222 rtnl_lock(); 3223 /* If we're already down or resetting, just bail */ 3224 if (test_bit(__IXGBEVF_DOWN, &adapter->state) || 3225 test_bit(__IXGBEVF_REMOVING, &adapter->state) || 3226 test_bit(__IXGBEVF_RESETTING, &adapter->state)) { 3227 rtnl_unlock(); 3228 return; 3229 } 3230 3231 adapter->tx_timeout_count++; 3232 3233 ixgbevf_reinit_locked(adapter); 3234 rtnl_unlock(); 3235 } 3236 3237 /** 3238 * ixgbevf_check_hang_subtask - check for hung queues and dropped interrupts 3239 * @adapter: pointer to the device adapter structure 3240 * 3241 * This function serves two purposes. First it strobes the interrupt lines 3242 * in order to make certain interrupts are occurring. Secondly it sets the 3243 * bits needed to check for TX hangs. As a result we should immediately 3244 * determine if a hang has occurred. 3245 **/ 3246 static void ixgbevf_check_hang_subtask(struct ixgbevf_adapter *adapter) 3247 { 3248 struct ixgbe_hw *hw = &adapter->hw; 3249 u32 eics = 0; 3250 int i; 3251 3252 /* If we're down or resetting, just bail */ 3253 if (test_bit(__IXGBEVF_DOWN, &adapter->state) || 3254 test_bit(__IXGBEVF_RESETTING, &adapter->state)) 3255 return; 3256 3257 /* Force detection of hung controller */ 3258 if (netif_carrier_ok(adapter->netdev)) { 3259 for (i = 0; i < adapter->num_tx_queues; i++) 3260 set_check_for_tx_hang(adapter->tx_ring[i]); 3261 for (i = 0; i < adapter->num_xdp_queues; i++) 3262 set_check_for_tx_hang(adapter->xdp_ring[i]); 3263 } 3264 3265 /* get one bit for every active Tx/Rx interrupt vector */ 3266 for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) { 3267 struct ixgbevf_q_vector *qv = adapter->q_vector[i]; 3268 3269 if (qv->rx.ring || qv->tx.ring) 3270 eics |= BIT(i); 3271 } 3272 3273 /* Cause software interrupt to ensure rings are cleaned */ 3274 IXGBE_WRITE_REG(hw, IXGBE_VTEICS, eics); 3275 } 3276 3277 /** 3278 * ixgbevf_watchdog_update_link - update the link status 3279 * @adapter: pointer to the device adapter structure 3280 **/ 3281 static void ixgbevf_watchdog_update_link(struct ixgbevf_adapter *adapter) 3282 { 3283 struct ixgbe_hw *hw = &adapter->hw; 3284 u32 link_speed = adapter->link_speed; 3285 bool link_up = adapter->link_up; 3286 s32 err; 3287 3288 spin_lock_bh(&adapter->mbx_lock); 3289 3290 err = hw->mac.ops.check_link(hw, &link_speed, &link_up, false); 3291 3292 spin_unlock_bh(&adapter->mbx_lock); 3293 3294 /* if check for link returns error we will need to reset */ 3295 if (err && time_after(jiffies, adapter->last_reset + (10 * HZ))) { 3296 set_bit(__IXGBEVF_RESET_REQUESTED, &adapter->state); 3297 link_up = false; 3298 } 3299 3300 adapter->link_up = link_up; 3301 adapter->link_speed = link_speed; 3302 } 3303 3304 /** 3305 * ixgbevf_watchdog_link_is_up - update netif_carrier status and 3306 * print link up message 3307 * @adapter: pointer to the device adapter structure 3308 **/ 3309 static void ixgbevf_watchdog_link_is_up(struct ixgbevf_adapter *adapter) 3310 { 3311 struct net_device *netdev = adapter->netdev; 3312 3313 /* only continue if link was previously down */ 3314 if (netif_carrier_ok(netdev)) 3315 return; 3316 3317 dev_info(&adapter->pdev->dev, "NIC Link is Up %s\n", 3318 (adapter->link_speed == IXGBE_LINK_SPEED_10GB_FULL) ? 3319 "10 Gbps" : 3320 (adapter->link_speed == IXGBE_LINK_SPEED_1GB_FULL) ? 3321 "1 Gbps" : 3322 (adapter->link_speed == IXGBE_LINK_SPEED_100_FULL) ? 3323 "100 Mbps" : 3324 "unknown speed"); 3325 3326 netif_carrier_on(netdev); 3327 } 3328 3329 /** 3330 * ixgbevf_watchdog_link_is_down - update netif_carrier status and 3331 * print link down message 3332 * @adapter: pointer to the adapter structure 3333 **/ 3334 static void ixgbevf_watchdog_link_is_down(struct ixgbevf_adapter *adapter) 3335 { 3336 struct net_device *netdev = adapter->netdev; 3337 3338 adapter->link_speed = 0; 3339 3340 /* only continue if link was up previously */ 3341 if (!netif_carrier_ok(netdev)) 3342 return; 3343 3344 dev_info(&adapter->pdev->dev, "NIC Link is Down\n"); 3345 3346 netif_carrier_off(netdev); 3347 } 3348 3349 /** 3350 * ixgbevf_watchdog_subtask - worker thread to bring link up 3351 * @adapter: board private structure 3352 **/ 3353 static void ixgbevf_watchdog_subtask(struct ixgbevf_adapter *adapter) 3354 { 3355 /* if interface is down do nothing */ 3356 if (test_bit(__IXGBEVF_DOWN, &adapter->state) || 3357 test_bit(__IXGBEVF_RESETTING, &adapter->state)) 3358 return; 3359 3360 ixgbevf_watchdog_update_link(adapter); 3361 3362 if (adapter->link_up && adapter->link_state) 3363 ixgbevf_watchdog_link_is_up(adapter); 3364 else 3365 ixgbevf_watchdog_link_is_down(adapter); 3366 3367 ixgbevf_update_stats(adapter); 3368 } 3369 3370 /** 3371 * ixgbevf_service_task - manages and runs subtasks 3372 * @work: pointer to work_struct containing our data 3373 **/ 3374 static void ixgbevf_service_task(struct work_struct *work) 3375 { 3376 struct ixgbevf_adapter *adapter = container_of(work, 3377 struct ixgbevf_adapter, 3378 service_task); 3379 struct ixgbe_hw *hw = &adapter->hw; 3380 3381 if (IXGBE_REMOVED(hw->hw_addr)) { 3382 if (!test_bit(__IXGBEVF_DOWN, &adapter->state)) { 3383 rtnl_lock(); 3384 ixgbevf_down(adapter); 3385 rtnl_unlock(); 3386 } 3387 return; 3388 } 3389 3390 ixgbevf_queue_reset_subtask(adapter); 3391 ixgbevf_reset_subtask(adapter); 3392 ixgbevf_watchdog_subtask(adapter); 3393 ixgbevf_check_hang_subtask(adapter); 3394 3395 ixgbevf_service_event_complete(adapter); 3396 } 3397 3398 /** 3399 * ixgbevf_free_tx_resources - Free Tx Resources per Queue 3400 * @tx_ring: Tx descriptor ring for a specific queue 3401 * 3402 * Free all transmit software resources 3403 **/ 3404 void ixgbevf_free_tx_resources(struct ixgbevf_ring *tx_ring) 3405 { 3406 ixgbevf_clean_tx_ring(tx_ring); 3407 3408 vfree(tx_ring->tx_buffer_info); 3409 tx_ring->tx_buffer_info = NULL; 3410 3411 /* if not set, then don't free */ 3412 if (!tx_ring->desc) 3413 return; 3414 3415 dma_free_coherent(tx_ring->dev, tx_ring->size, tx_ring->desc, 3416 tx_ring->dma); 3417 3418 tx_ring->desc = NULL; 3419 } 3420 3421 /** 3422 * ixgbevf_free_all_tx_resources - Free Tx Resources for All Queues 3423 * @adapter: board private structure 3424 * 3425 * Free all transmit software resources 3426 **/ 3427 static void ixgbevf_free_all_tx_resources(struct ixgbevf_adapter *adapter) 3428 { 3429 int i; 3430 3431 for (i = 0; i < adapter->num_tx_queues; i++) 3432 if (adapter->tx_ring[i]->desc) 3433 ixgbevf_free_tx_resources(adapter->tx_ring[i]); 3434 for (i = 0; i < adapter->num_xdp_queues; i++) 3435 if (adapter->xdp_ring[i]->desc) 3436 ixgbevf_free_tx_resources(adapter->xdp_ring[i]); 3437 } 3438 3439 /** 3440 * ixgbevf_setup_tx_resources - allocate Tx resources (Descriptors) 3441 * @tx_ring: Tx descriptor ring (for a specific queue) to setup 3442 * 3443 * Return 0 on success, negative on failure 3444 **/ 3445 int ixgbevf_setup_tx_resources(struct ixgbevf_ring *tx_ring) 3446 { 3447 struct ixgbevf_adapter *adapter = netdev_priv(tx_ring->netdev); 3448 int size; 3449 3450 size = sizeof(struct ixgbevf_tx_buffer) * tx_ring->count; 3451 tx_ring->tx_buffer_info = vmalloc(size); 3452 if (!tx_ring->tx_buffer_info) 3453 goto err; 3454 3455 u64_stats_init(&tx_ring->syncp); 3456 3457 /* round up to nearest 4K */ 3458 tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc); 3459 tx_ring->size = ALIGN(tx_ring->size, 4096); 3460 3461 tx_ring->desc = dma_alloc_coherent(tx_ring->dev, tx_ring->size, 3462 &tx_ring->dma, GFP_KERNEL); 3463 if (!tx_ring->desc) 3464 goto err; 3465 3466 return 0; 3467 3468 err: 3469 vfree(tx_ring->tx_buffer_info); 3470 tx_ring->tx_buffer_info = NULL; 3471 hw_dbg(&adapter->hw, "Unable to allocate memory for the transmit descriptor ring\n"); 3472 return -ENOMEM; 3473 } 3474 3475 /** 3476 * ixgbevf_setup_all_tx_resources - allocate all queues Tx resources 3477 * @adapter: board private structure 3478 * 3479 * If this function returns with an error, then it's possible one or 3480 * more of the rings is populated (while the rest are not). It is the 3481 * callers duty to clean those orphaned rings. 3482 * 3483 * Return 0 on success, negative on failure 3484 **/ 3485 static int ixgbevf_setup_all_tx_resources(struct ixgbevf_adapter *adapter) 3486 { 3487 int i, j = 0, err = 0; 3488 3489 for (i = 0; i < adapter->num_tx_queues; i++) { 3490 err = ixgbevf_setup_tx_resources(adapter->tx_ring[i]); 3491 if (!err) 3492 continue; 3493 hw_dbg(&adapter->hw, "Allocation for Tx Queue %u failed\n", i); 3494 goto err_setup_tx; 3495 } 3496 3497 for (j = 0; j < adapter->num_xdp_queues; j++) { 3498 err = ixgbevf_setup_tx_resources(adapter->xdp_ring[j]); 3499 if (!err) 3500 continue; 3501 hw_dbg(&adapter->hw, "Allocation for XDP Queue %u failed\n", j); 3502 goto err_setup_tx; 3503 } 3504 3505 return 0; 3506 err_setup_tx: 3507 /* rewind the index freeing the rings as we go */ 3508 while (j--) 3509 ixgbevf_free_tx_resources(adapter->xdp_ring[j]); 3510 while (i--) 3511 ixgbevf_free_tx_resources(adapter->tx_ring[i]); 3512 3513 return err; 3514 } 3515 3516 /** 3517 * ixgbevf_setup_rx_resources - allocate Rx resources (Descriptors) 3518 * @adapter: board private structure 3519 * @rx_ring: Rx descriptor ring (for a specific queue) to setup 3520 * 3521 * Returns 0 on success, negative on failure 3522 **/ 3523 int ixgbevf_setup_rx_resources(struct ixgbevf_adapter *adapter, 3524 struct ixgbevf_ring *rx_ring) 3525 { 3526 int size; 3527 3528 size = sizeof(struct ixgbevf_rx_buffer) * rx_ring->count; 3529 rx_ring->rx_buffer_info = vmalloc(size); 3530 if (!rx_ring->rx_buffer_info) 3531 goto err; 3532 3533 u64_stats_init(&rx_ring->syncp); 3534 3535 /* Round up to nearest 4K */ 3536 rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc); 3537 rx_ring->size = ALIGN(rx_ring->size, 4096); 3538 3539 rx_ring->desc = dma_alloc_coherent(rx_ring->dev, rx_ring->size, 3540 &rx_ring->dma, GFP_KERNEL); 3541 3542 if (!rx_ring->desc) 3543 goto err; 3544 3545 /* XDP RX-queue info */ 3546 if (xdp_rxq_info_reg(&rx_ring->xdp_rxq, adapter->netdev, 3547 rx_ring->queue_index, 0) < 0) 3548 goto err; 3549 3550 rx_ring->xdp_prog = adapter->xdp_prog; 3551 3552 return 0; 3553 err: 3554 vfree(rx_ring->rx_buffer_info); 3555 rx_ring->rx_buffer_info = NULL; 3556 dev_err(rx_ring->dev, "Unable to allocate memory for the Rx descriptor ring\n"); 3557 return -ENOMEM; 3558 } 3559 3560 /** 3561 * ixgbevf_setup_all_rx_resources - allocate all queues Rx resources 3562 * @adapter: board private structure 3563 * 3564 * If this function returns with an error, then it's possible one or 3565 * more of the rings is populated (while the rest are not). It is the 3566 * callers duty to clean those orphaned rings. 3567 * 3568 * Return 0 on success, negative on failure 3569 **/ 3570 static int ixgbevf_setup_all_rx_resources(struct ixgbevf_adapter *adapter) 3571 { 3572 int i, err = 0; 3573 3574 for (i = 0; i < adapter->num_rx_queues; i++) { 3575 err = ixgbevf_setup_rx_resources(adapter, adapter->rx_ring[i]); 3576 if (!err) 3577 continue; 3578 hw_dbg(&adapter->hw, "Allocation for Rx Queue %u failed\n", i); 3579 goto err_setup_rx; 3580 } 3581 3582 return 0; 3583 err_setup_rx: 3584 /* rewind the index freeing the rings as we go */ 3585 while (i--) 3586 ixgbevf_free_rx_resources(adapter->rx_ring[i]); 3587 return err; 3588 } 3589 3590 /** 3591 * ixgbevf_free_rx_resources - Free Rx Resources 3592 * @rx_ring: ring to clean the resources from 3593 * 3594 * Free all receive software resources 3595 **/ 3596 void ixgbevf_free_rx_resources(struct ixgbevf_ring *rx_ring) 3597 { 3598 ixgbevf_clean_rx_ring(rx_ring); 3599 3600 rx_ring->xdp_prog = NULL; 3601 xdp_rxq_info_unreg(&rx_ring->xdp_rxq); 3602 vfree(rx_ring->rx_buffer_info); 3603 rx_ring->rx_buffer_info = NULL; 3604 3605 dma_free_coherent(rx_ring->dev, rx_ring->size, rx_ring->desc, 3606 rx_ring->dma); 3607 3608 rx_ring->desc = NULL; 3609 } 3610 3611 /** 3612 * ixgbevf_free_all_rx_resources - Free Rx Resources for All Queues 3613 * @adapter: board private structure 3614 * 3615 * Free all receive software resources 3616 **/ 3617 static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter *adapter) 3618 { 3619 int i; 3620 3621 for (i = 0; i < adapter->num_rx_queues; i++) 3622 if (adapter->rx_ring[i]->desc) 3623 ixgbevf_free_rx_resources(adapter->rx_ring[i]); 3624 } 3625 3626 /** 3627 * ixgbevf_open - Called when a network interface is made active 3628 * @netdev: network interface device structure 3629 * 3630 * Returns 0 on success, negative value on failure 3631 * 3632 * The open entry point is called when a network interface is made 3633 * active by the system (IFF_UP). At this point all resources needed 3634 * for transmit and receive operations are allocated, the interrupt 3635 * handler is registered with the OS, the watchdog timer is started, 3636 * and the stack is notified that the interface is ready. 3637 **/ 3638 int ixgbevf_open(struct net_device *netdev) 3639 { 3640 struct ixgbevf_adapter *adapter = netdev_priv(netdev); 3641 struct ixgbe_hw *hw = &adapter->hw; 3642 int err; 3643 3644 /* A previous failure to open the device because of a lack of 3645 * available MSIX vector resources may have reset the number 3646 * of msix vectors variable to zero. The only way to recover 3647 * is to unload/reload the driver and hope that the system has 3648 * been able to recover some MSIX vector resources. 3649 */ 3650 if (!adapter->num_msix_vectors) 3651 return -ENOMEM; 3652 3653 if (hw->adapter_stopped) { 3654 ixgbevf_reset(adapter); 3655 /* if adapter is still stopped then PF isn't up and 3656 * the VF can't start. 3657 */ 3658 if (hw->adapter_stopped) { 3659 err = IXGBE_ERR_MBX; 3660 pr_err("Unable to start - perhaps the PF Driver isn't up yet\n"); 3661 goto err_setup_reset; 3662 } 3663 } 3664 3665 /* disallow open during test */ 3666 if (test_bit(__IXGBEVF_TESTING, &adapter->state)) 3667 return -EBUSY; 3668 3669 netif_carrier_off(netdev); 3670 3671 /* allocate transmit descriptors */ 3672 err = ixgbevf_setup_all_tx_resources(adapter); 3673 if (err) 3674 goto err_setup_tx; 3675 3676 /* allocate receive descriptors */ 3677 err = ixgbevf_setup_all_rx_resources(adapter); 3678 if (err) 3679 goto err_setup_rx; 3680 3681 ixgbevf_configure(adapter); 3682 3683 err = ixgbevf_request_irq(adapter); 3684 if (err) 3685 goto err_req_irq; 3686 3687 /* Notify the stack of the actual queue counts. */ 3688 err = netif_set_real_num_tx_queues(netdev, adapter->num_tx_queues); 3689 if (err) 3690 goto err_set_queues; 3691 3692 err = netif_set_real_num_rx_queues(netdev, adapter->num_rx_queues); 3693 if (err) 3694 goto err_set_queues; 3695 3696 ixgbevf_up_complete(adapter); 3697 3698 return 0; 3699 3700 err_set_queues: 3701 ixgbevf_free_irq(adapter); 3702 err_req_irq: 3703 ixgbevf_free_all_rx_resources(adapter); 3704 err_setup_rx: 3705 ixgbevf_free_all_tx_resources(adapter); 3706 err_setup_tx: 3707 ixgbevf_reset(adapter); 3708 err_setup_reset: 3709 3710 return err; 3711 } 3712 3713 /** 3714 * ixgbevf_close_suspend - actions necessary to both suspend and close flows 3715 * @adapter: the private adapter struct 3716 * 3717 * This function should contain the necessary work common to both suspending 3718 * and closing of the device. 3719 */ 3720 static void ixgbevf_close_suspend(struct ixgbevf_adapter *adapter) 3721 { 3722 ixgbevf_down(adapter); 3723 ixgbevf_free_irq(adapter); 3724 ixgbevf_free_all_tx_resources(adapter); 3725 ixgbevf_free_all_rx_resources(adapter); 3726 } 3727 3728 /** 3729 * ixgbevf_close - Disables a network interface 3730 * @netdev: network interface device structure 3731 * 3732 * Returns 0, this is not allowed to fail 3733 * 3734 * The close entry point is called when an interface is de-activated 3735 * by the OS. The hardware is still under the drivers control, but 3736 * needs to be disabled. A global MAC reset is issued to stop the 3737 * hardware, and all transmit and receive resources are freed. 3738 **/ 3739 int ixgbevf_close(struct net_device *netdev) 3740 { 3741 struct ixgbevf_adapter *adapter = netdev_priv(netdev); 3742 3743 if (netif_device_present(netdev)) 3744 ixgbevf_close_suspend(adapter); 3745 3746 return 0; 3747 } 3748 3749 static void ixgbevf_queue_reset_subtask(struct ixgbevf_adapter *adapter) 3750 { 3751 struct net_device *dev = adapter->netdev; 3752 3753 if (!test_and_clear_bit(__IXGBEVF_QUEUE_RESET_REQUESTED, 3754 &adapter->state)) 3755 return; 3756 3757 /* if interface is down do nothing */ 3758 if (test_bit(__IXGBEVF_DOWN, &adapter->state) || 3759 test_bit(__IXGBEVF_RESETTING, &adapter->state)) 3760 return; 3761 3762 /* Hardware has to reinitialize queues and interrupts to 3763 * match packet buffer alignment. Unfortunately, the 3764 * hardware is not flexible enough to do this dynamically. 3765 */ 3766 rtnl_lock(); 3767 3768 if (netif_running(dev)) 3769 ixgbevf_close(dev); 3770 3771 ixgbevf_clear_interrupt_scheme(adapter); 3772 ixgbevf_init_interrupt_scheme(adapter); 3773 3774 if (netif_running(dev)) 3775 ixgbevf_open(dev); 3776 3777 rtnl_unlock(); 3778 } 3779 3780 static void ixgbevf_tx_ctxtdesc(struct ixgbevf_ring *tx_ring, 3781 u32 vlan_macip_lens, u32 fceof_saidx, 3782 u32 type_tucmd, u32 mss_l4len_idx) 3783 { 3784 struct ixgbe_adv_tx_context_desc *context_desc; 3785 u16 i = tx_ring->next_to_use; 3786 3787 context_desc = IXGBEVF_TX_CTXTDESC(tx_ring, i); 3788 3789 i++; 3790 tx_ring->next_to_use = (i < tx_ring->count) ? i : 0; 3791 3792 /* set bits to identify this as an advanced context descriptor */ 3793 type_tucmd |= IXGBE_TXD_CMD_DEXT | IXGBE_ADVTXD_DTYP_CTXT; 3794 3795 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens); 3796 context_desc->fceof_saidx = cpu_to_le32(fceof_saidx); 3797 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd); 3798 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx); 3799 } 3800 3801 static int ixgbevf_tso(struct ixgbevf_ring *tx_ring, 3802 struct ixgbevf_tx_buffer *first, 3803 u8 *hdr_len, 3804 struct ixgbevf_ipsec_tx_data *itd) 3805 { 3806 u32 vlan_macip_lens, type_tucmd, mss_l4len_idx; 3807 struct sk_buff *skb = first->skb; 3808 union { 3809 struct iphdr *v4; 3810 struct ipv6hdr *v6; 3811 unsigned char *hdr; 3812 } ip; 3813 union { 3814 struct tcphdr *tcp; 3815 unsigned char *hdr; 3816 } l4; 3817 u32 paylen, l4_offset; 3818 u32 fceof_saidx = 0; 3819 int err; 3820 3821 if (skb->ip_summed != CHECKSUM_PARTIAL) 3822 return 0; 3823 3824 if (!skb_is_gso(skb)) 3825 return 0; 3826 3827 err = skb_cow_head(skb, 0); 3828 if (err < 0) 3829 return err; 3830 3831 if (eth_p_mpls(first->protocol)) 3832 ip.hdr = skb_inner_network_header(skb); 3833 else 3834 ip.hdr = skb_network_header(skb); 3835 l4.hdr = skb_checksum_start(skb); 3836 3837 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */ 3838 type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP; 3839 3840 /* initialize outer IP header fields */ 3841 if (ip.v4->version == 4) { 3842 unsigned char *csum_start = skb_checksum_start(skb); 3843 unsigned char *trans_start = ip.hdr + (ip.v4->ihl * 4); 3844 int len = csum_start - trans_start; 3845 3846 /* IP header will have to cancel out any data that 3847 * is not a part of the outer IP header, so set to 3848 * a reverse csum if needed, else init check to 0. 3849 */ 3850 ip.v4->check = (skb_shinfo(skb)->gso_type & SKB_GSO_PARTIAL) ? 3851 csum_fold(csum_partial(trans_start, 3852 len, 0)) : 0; 3853 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4; 3854 3855 ip.v4->tot_len = 0; 3856 first->tx_flags |= IXGBE_TX_FLAGS_TSO | 3857 IXGBE_TX_FLAGS_CSUM | 3858 IXGBE_TX_FLAGS_IPV4; 3859 } else { 3860 ip.v6->payload_len = 0; 3861 first->tx_flags |= IXGBE_TX_FLAGS_TSO | 3862 IXGBE_TX_FLAGS_CSUM; 3863 } 3864 3865 /* determine offset of inner transport header */ 3866 l4_offset = l4.hdr - skb->data; 3867 3868 /* compute length of segmentation header */ 3869 *hdr_len = (l4.tcp->doff * 4) + l4_offset; 3870 3871 /* remove payload length from inner checksum */ 3872 paylen = skb->len - l4_offset; 3873 csum_replace_by_diff(&l4.tcp->check, (__force __wsum)htonl(paylen)); 3874 3875 /* update gso size and bytecount with header size */ 3876 first->gso_segs = skb_shinfo(skb)->gso_segs; 3877 first->bytecount += (first->gso_segs - 1) * *hdr_len; 3878 3879 /* mss_l4len_id: use 1 as index for TSO */ 3880 mss_l4len_idx = (*hdr_len - l4_offset) << IXGBE_ADVTXD_L4LEN_SHIFT; 3881 mss_l4len_idx |= skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT; 3882 mss_l4len_idx |= (1u << IXGBE_ADVTXD_IDX_SHIFT); 3883 3884 fceof_saidx |= itd->pfsa; 3885 type_tucmd |= itd->flags | itd->trailer_len; 3886 3887 /* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */ 3888 vlan_macip_lens = l4.hdr - ip.hdr; 3889 vlan_macip_lens |= (ip.hdr - skb->data) << IXGBE_ADVTXD_MACLEN_SHIFT; 3890 vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK; 3891 3892 ixgbevf_tx_ctxtdesc(tx_ring, vlan_macip_lens, fceof_saidx, type_tucmd, 3893 mss_l4len_idx); 3894 3895 return 1; 3896 } 3897 3898 static void ixgbevf_tx_csum(struct ixgbevf_ring *tx_ring, 3899 struct ixgbevf_tx_buffer *first, 3900 struct ixgbevf_ipsec_tx_data *itd) 3901 { 3902 struct sk_buff *skb = first->skb; 3903 u32 vlan_macip_lens = 0; 3904 u32 fceof_saidx = 0; 3905 u32 type_tucmd = 0; 3906 3907 if (skb->ip_summed != CHECKSUM_PARTIAL) 3908 goto no_csum; 3909 3910 switch (skb->csum_offset) { 3911 case offsetof(struct tcphdr, check): 3912 type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP; 3913 fallthrough; 3914 case offsetof(struct udphdr, check): 3915 break; 3916 case offsetof(struct sctphdr, checksum): 3917 /* validate that this is actually an SCTP request */ 3918 if (skb_csum_is_sctp(skb)) { 3919 type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_SCTP; 3920 break; 3921 } 3922 fallthrough; 3923 default: 3924 skb_checksum_help(skb); 3925 goto no_csum; 3926 } 3927 3928 if (first->protocol == htons(ETH_P_IP)) 3929 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4; 3930 3931 /* update TX checksum flag */ 3932 first->tx_flags |= IXGBE_TX_FLAGS_CSUM; 3933 vlan_macip_lens = skb_checksum_start_offset(skb) - 3934 skb_network_offset(skb); 3935 no_csum: 3936 /* vlan_macip_lens: MACLEN, VLAN tag */ 3937 vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT; 3938 vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK; 3939 3940 fceof_saidx |= itd->pfsa; 3941 type_tucmd |= itd->flags | itd->trailer_len; 3942 3943 ixgbevf_tx_ctxtdesc(tx_ring, vlan_macip_lens, 3944 fceof_saidx, type_tucmd, 0); 3945 } 3946 3947 static __le32 ixgbevf_tx_cmd_type(u32 tx_flags) 3948 { 3949 /* set type for advanced descriptor with frame checksum insertion */ 3950 __le32 cmd_type = cpu_to_le32(IXGBE_ADVTXD_DTYP_DATA | 3951 IXGBE_ADVTXD_DCMD_IFCS | 3952 IXGBE_ADVTXD_DCMD_DEXT); 3953 3954 /* set HW VLAN bit if VLAN is present */ 3955 if (tx_flags & IXGBE_TX_FLAGS_VLAN) 3956 cmd_type |= cpu_to_le32(IXGBE_ADVTXD_DCMD_VLE); 3957 3958 /* set segmentation enable bits for TSO/FSO */ 3959 if (tx_flags & IXGBE_TX_FLAGS_TSO) 3960 cmd_type |= cpu_to_le32(IXGBE_ADVTXD_DCMD_TSE); 3961 3962 return cmd_type; 3963 } 3964 3965 static void ixgbevf_tx_olinfo_status(union ixgbe_adv_tx_desc *tx_desc, 3966 u32 tx_flags, unsigned int paylen) 3967 { 3968 __le32 olinfo_status = cpu_to_le32(paylen << IXGBE_ADVTXD_PAYLEN_SHIFT); 3969 3970 /* enable L4 checksum for TSO and TX checksum offload */ 3971 if (tx_flags & IXGBE_TX_FLAGS_CSUM) 3972 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_POPTS_TXSM); 3973 3974 /* enble IPv4 checksum for TSO */ 3975 if (tx_flags & IXGBE_TX_FLAGS_IPV4) 3976 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_POPTS_IXSM); 3977 3978 /* enable IPsec */ 3979 if (tx_flags & IXGBE_TX_FLAGS_IPSEC) 3980 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_POPTS_IPSEC); 3981 3982 /* use index 1 context for TSO/FSO/FCOE/IPSEC */ 3983 if (tx_flags & (IXGBE_TX_FLAGS_TSO | IXGBE_TX_FLAGS_IPSEC)) 3984 olinfo_status |= cpu_to_le32(1u << IXGBE_ADVTXD_IDX_SHIFT); 3985 3986 /* Check Context must be set if Tx switch is enabled, which it 3987 * always is for case where virtual functions are running 3988 */ 3989 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_CC); 3990 3991 tx_desc->read.olinfo_status = olinfo_status; 3992 } 3993 3994 static void ixgbevf_tx_map(struct ixgbevf_ring *tx_ring, 3995 struct ixgbevf_tx_buffer *first, 3996 const u8 hdr_len) 3997 { 3998 struct sk_buff *skb = first->skb; 3999 struct ixgbevf_tx_buffer *tx_buffer; 4000 union ixgbe_adv_tx_desc *tx_desc; 4001 skb_frag_t *frag; 4002 dma_addr_t dma; 4003 unsigned int data_len, size; 4004 u32 tx_flags = first->tx_flags; 4005 __le32 cmd_type = ixgbevf_tx_cmd_type(tx_flags); 4006 u16 i = tx_ring->next_to_use; 4007 4008 tx_desc = IXGBEVF_TX_DESC(tx_ring, i); 4009 4010 ixgbevf_tx_olinfo_status(tx_desc, tx_flags, skb->len - hdr_len); 4011 4012 size = skb_headlen(skb); 4013 data_len = skb->data_len; 4014 4015 dma = dma_map_single(tx_ring->dev, skb->data, size, DMA_TO_DEVICE); 4016 4017 tx_buffer = first; 4018 4019 for (frag = &skb_shinfo(skb)->frags[0];; frag++) { 4020 if (dma_mapping_error(tx_ring->dev, dma)) 4021 goto dma_error; 4022 4023 /* record length, and DMA address */ 4024 dma_unmap_len_set(tx_buffer, len, size); 4025 dma_unmap_addr_set(tx_buffer, dma, dma); 4026 4027 tx_desc->read.buffer_addr = cpu_to_le64(dma); 4028 4029 while (unlikely(size > IXGBE_MAX_DATA_PER_TXD)) { 4030 tx_desc->read.cmd_type_len = 4031 cmd_type | cpu_to_le32(IXGBE_MAX_DATA_PER_TXD); 4032 4033 i++; 4034 tx_desc++; 4035 if (i == tx_ring->count) { 4036 tx_desc = IXGBEVF_TX_DESC(tx_ring, 0); 4037 i = 0; 4038 } 4039 tx_desc->read.olinfo_status = 0; 4040 4041 dma += IXGBE_MAX_DATA_PER_TXD; 4042 size -= IXGBE_MAX_DATA_PER_TXD; 4043 4044 tx_desc->read.buffer_addr = cpu_to_le64(dma); 4045 } 4046 4047 if (likely(!data_len)) 4048 break; 4049 4050 tx_desc->read.cmd_type_len = cmd_type | cpu_to_le32(size); 4051 4052 i++; 4053 tx_desc++; 4054 if (i == tx_ring->count) { 4055 tx_desc = IXGBEVF_TX_DESC(tx_ring, 0); 4056 i = 0; 4057 } 4058 tx_desc->read.olinfo_status = 0; 4059 4060 size = skb_frag_size(frag); 4061 data_len -= size; 4062 4063 dma = skb_frag_dma_map(tx_ring->dev, frag, 0, size, 4064 DMA_TO_DEVICE); 4065 4066 tx_buffer = &tx_ring->tx_buffer_info[i]; 4067 } 4068 4069 /* write last descriptor with RS and EOP bits */ 4070 cmd_type |= cpu_to_le32(size) | cpu_to_le32(IXGBE_TXD_CMD); 4071 tx_desc->read.cmd_type_len = cmd_type; 4072 4073 /* set the timestamp */ 4074 first->time_stamp = jiffies; 4075 4076 skb_tx_timestamp(skb); 4077 4078 /* Force memory writes to complete before letting h/w know there 4079 * are new descriptors to fetch. (Only applicable for weak-ordered 4080 * memory model archs, such as IA-64). 4081 * 4082 * We also need this memory barrier (wmb) to make certain all of the 4083 * status bits have been updated before next_to_watch is written. 4084 */ 4085 wmb(); 4086 4087 /* set next_to_watch value indicating a packet is present */ 4088 first->next_to_watch = tx_desc; 4089 4090 i++; 4091 if (i == tx_ring->count) 4092 i = 0; 4093 4094 tx_ring->next_to_use = i; 4095 4096 /* notify HW of packet */ 4097 ixgbevf_write_tail(tx_ring, i); 4098 4099 return; 4100 dma_error: 4101 dev_err(tx_ring->dev, "TX DMA map failed\n"); 4102 tx_buffer = &tx_ring->tx_buffer_info[i]; 4103 4104 /* clear dma mappings for failed tx_buffer_info map */ 4105 while (tx_buffer != first) { 4106 if (dma_unmap_len(tx_buffer, len)) 4107 dma_unmap_page(tx_ring->dev, 4108 dma_unmap_addr(tx_buffer, dma), 4109 dma_unmap_len(tx_buffer, len), 4110 DMA_TO_DEVICE); 4111 dma_unmap_len_set(tx_buffer, len, 0); 4112 4113 if (i-- == 0) 4114 i += tx_ring->count; 4115 tx_buffer = &tx_ring->tx_buffer_info[i]; 4116 } 4117 4118 if (dma_unmap_len(tx_buffer, len)) 4119 dma_unmap_single(tx_ring->dev, 4120 dma_unmap_addr(tx_buffer, dma), 4121 dma_unmap_len(tx_buffer, len), 4122 DMA_TO_DEVICE); 4123 dma_unmap_len_set(tx_buffer, len, 0); 4124 4125 dev_kfree_skb_any(tx_buffer->skb); 4126 tx_buffer->skb = NULL; 4127 4128 tx_ring->next_to_use = i; 4129 } 4130 4131 static int __ixgbevf_maybe_stop_tx(struct ixgbevf_ring *tx_ring, int size) 4132 { 4133 netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index); 4134 /* Herbert's original patch had: 4135 * smp_mb__after_netif_stop_queue(); 4136 * but since that doesn't exist yet, just open code it. 4137 */ 4138 smp_mb(); 4139 4140 /* We need to check again in a case another CPU has just 4141 * made room available. 4142 */ 4143 if (likely(ixgbevf_desc_unused(tx_ring) < size)) 4144 return -EBUSY; 4145 4146 /* A reprieve! - use start_queue because it doesn't call schedule */ 4147 netif_start_subqueue(tx_ring->netdev, tx_ring->queue_index); 4148 ++tx_ring->tx_stats.restart_queue; 4149 4150 return 0; 4151 } 4152 4153 static int ixgbevf_maybe_stop_tx(struct ixgbevf_ring *tx_ring, int size) 4154 { 4155 if (likely(ixgbevf_desc_unused(tx_ring) >= size)) 4156 return 0; 4157 return __ixgbevf_maybe_stop_tx(tx_ring, size); 4158 } 4159 4160 static int ixgbevf_xmit_frame_ring(struct sk_buff *skb, 4161 struct ixgbevf_ring *tx_ring) 4162 { 4163 struct ixgbevf_tx_buffer *first; 4164 int tso; 4165 u32 tx_flags = 0; 4166 u16 count = TXD_USE_COUNT(skb_headlen(skb)); 4167 struct ixgbevf_ipsec_tx_data ipsec_tx = { 0 }; 4168 #if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD 4169 unsigned short f; 4170 #endif 4171 u8 hdr_len = 0; 4172 u8 *dst_mac = skb_header_pointer(skb, 0, 0, NULL); 4173 4174 if (!dst_mac || is_link_local_ether_addr(dst_mac)) { 4175 dev_kfree_skb_any(skb); 4176 return NETDEV_TX_OK; 4177 } 4178 4179 /* need: 1 descriptor per page * PAGE_SIZE/IXGBE_MAX_DATA_PER_TXD, 4180 * + 1 desc for skb_headlen/IXGBE_MAX_DATA_PER_TXD, 4181 * + 2 desc gap to keep tail from touching head, 4182 * + 1 desc for context descriptor, 4183 * otherwise try next time 4184 */ 4185 #if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD 4186 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) { 4187 skb_frag_t *frag = &skb_shinfo(skb)->frags[f]; 4188 4189 count += TXD_USE_COUNT(skb_frag_size(frag)); 4190 } 4191 #else 4192 count += skb_shinfo(skb)->nr_frags; 4193 #endif 4194 if (ixgbevf_maybe_stop_tx(tx_ring, count + 3)) { 4195 tx_ring->tx_stats.tx_busy++; 4196 return NETDEV_TX_BUSY; 4197 } 4198 4199 /* record the location of the first descriptor for this packet */ 4200 first = &tx_ring->tx_buffer_info[tx_ring->next_to_use]; 4201 first->skb = skb; 4202 first->bytecount = skb->len; 4203 first->gso_segs = 1; 4204 4205 if (skb_vlan_tag_present(skb)) { 4206 tx_flags |= skb_vlan_tag_get(skb); 4207 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT; 4208 tx_flags |= IXGBE_TX_FLAGS_VLAN; 4209 } 4210 4211 /* record initial flags and protocol */ 4212 first->tx_flags = tx_flags; 4213 first->protocol = vlan_get_protocol(skb); 4214 4215 #ifdef CONFIG_IXGBEVF_IPSEC 4216 if (xfrm_offload(skb) && !ixgbevf_ipsec_tx(tx_ring, first, &ipsec_tx)) 4217 goto out_drop; 4218 #endif 4219 tso = ixgbevf_tso(tx_ring, first, &hdr_len, &ipsec_tx); 4220 if (tso < 0) 4221 goto out_drop; 4222 else if (!tso) 4223 ixgbevf_tx_csum(tx_ring, first, &ipsec_tx); 4224 4225 ixgbevf_tx_map(tx_ring, first, hdr_len); 4226 4227 ixgbevf_maybe_stop_tx(tx_ring, DESC_NEEDED); 4228 4229 return NETDEV_TX_OK; 4230 4231 out_drop: 4232 dev_kfree_skb_any(first->skb); 4233 first->skb = NULL; 4234 4235 return NETDEV_TX_OK; 4236 } 4237 4238 static netdev_tx_t ixgbevf_xmit_frame(struct sk_buff *skb, struct net_device *netdev) 4239 { 4240 struct ixgbevf_adapter *adapter = netdev_priv(netdev); 4241 struct ixgbevf_ring *tx_ring; 4242 4243 if (skb->len <= 0) { 4244 dev_kfree_skb_any(skb); 4245 return NETDEV_TX_OK; 4246 } 4247 4248 /* The minimum packet size for olinfo paylen is 17 so pad the skb 4249 * in order to meet this minimum size requirement. 4250 */ 4251 if (skb->len < 17) { 4252 if (skb_padto(skb, 17)) 4253 return NETDEV_TX_OK; 4254 skb->len = 17; 4255 } 4256 4257 tx_ring = adapter->tx_ring[skb->queue_mapping]; 4258 return ixgbevf_xmit_frame_ring(skb, tx_ring); 4259 } 4260 4261 /** 4262 * ixgbevf_set_mac - Change the Ethernet Address of the NIC 4263 * @netdev: network interface device structure 4264 * @p: pointer to an address structure 4265 * 4266 * Returns 0 on success, negative on failure 4267 **/ 4268 static int ixgbevf_set_mac(struct net_device *netdev, void *p) 4269 { 4270 struct ixgbevf_adapter *adapter = netdev_priv(netdev); 4271 struct ixgbe_hw *hw = &adapter->hw; 4272 struct sockaddr *addr = p; 4273 int err; 4274 4275 if (!is_valid_ether_addr(addr->sa_data)) 4276 return -EADDRNOTAVAIL; 4277 4278 spin_lock_bh(&adapter->mbx_lock); 4279 4280 err = hw->mac.ops.set_rar(hw, 0, addr->sa_data, 0); 4281 4282 spin_unlock_bh(&adapter->mbx_lock); 4283 4284 if (err) 4285 return -EPERM; 4286 4287 ether_addr_copy(hw->mac.addr, addr->sa_data); 4288 ether_addr_copy(hw->mac.perm_addr, addr->sa_data); 4289 eth_hw_addr_set(netdev, addr->sa_data); 4290 4291 return 0; 4292 } 4293 4294 /** 4295 * ixgbevf_change_mtu - Change the Maximum Transfer Unit 4296 * @netdev: network interface device structure 4297 * @new_mtu: new value for maximum frame size 4298 * 4299 * Returns 0 on success, negative on failure 4300 **/ 4301 static int ixgbevf_change_mtu(struct net_device *netdev, int new_mtu) 4302 { 4303 struct ixgbevf_adapter *adapter = netdev_priv(netdev); 4304 struct ixgbe_hw *hw = &adapter->hw; 4305 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN; 4306 int ret; 4307 4308 /* prevent MTU being changed to a size unsupported by XDP */ 4309 if (adapter->xdp_prog) { 4310 dev_warn(&adapter->pdev->dev, "MTU cannot be changed while XDP program is loaded\n"); 4311 return -EPERM; 4312 } 4313 4314 spin_lock_bh(&adapter->mbx_lock); 4315 /* notify the PF of our intent to use this size of frame */ 4316 ret = hw->mac.ops.set_rlpml(hw, max_frame); 4317 spin_unlock_bh(&adapter->mbx_lock); 4318 if (ret) 4319 return -EINVAL; 4320 4321 hw_dbg(hw, "changing MTU from %d to %d\n", 4322 netdev->mtu, new_mtu); 4323 4324 /* must set new MTU before calling down or up */ 4325 WRITE_ONCE(netdev->mtu, new_mtu); 4326 4327 if (netif_running(netdev)) 4328 ixgbevf_reinit_locked(adapter); 4329 4330 return 0; 4331 } 4332 4333 static int ixgbevf_suspend(struct device *dev_d) 4334 { 4335 struct net_device *netdev = dev_get_drvdata(dev_d); 4336 struct ixgbevf_adapter *adapter = netdev_priv(netdev); 4337 4338 rtnl_lock(); 4339 netif_device_detach(netdev); 4340 4341 if (netif_running(netdev)) 4342 ixgbevf_close_suspend(adapter); 4343 4344 ixgbevf_clear_interrupt_scheme(adapter); 4345 rtnl_unlock(); 4346 4347 return 0; 4348 } 4349 4350 static int ixgbevf_resume(struct device *dev_d) 4351 { 4352 struct pci_dev *pdev = to_pci_dev(dev_d); 4353 struct net_device *netdev = pci_get_drvdata(pdev); 4354 struct ixgbevf_adapter *adapter = netdev_priv(netdev); 4355 int err; 4356 4357 adapter->hw.hw_addr = adapter->io_addr; 4358 smp_mb__before_atomic(); 4359 clear_bit(__IXGBEVF_DISABLED, &adapter->state); 4360 pci_set_master(pdev); 4361 4362 ixgbevf_reset(adapter); 4363 4364 rtnl_lock(); 4365 err = ixgbevf_init_interrupt_scheme(adapter); 4366 if (!err && netif_running(netdev)) 4367 err = ixgbevf_open(netdev); 4368 rtnl_unlock(); 4369 if (err) 4370 return err; 4371 4372 netif_device_attach(netdev); 4373 4374 return err; 4375 } 4376 4377 static void ixgbevf_shutdown(struct pci_dev *pdev) 4378 { 4379 ixgbevf_suspend(&pdev->dev); 4380 } 4381 4382 static void ixgbevf_get_tx_ring_stats(struct rtnl_link_stats64 *stats, 4383 const struct ixgbevf_ring *ring) 4384 { 4385 u64 bytes, packets; 4386 unsigned int start; 4387 4388 if (ring) { 4389 do { 4390 start = u64_stats_fetch_begin(&ring->syncp); 4391 bytes = ring->stats.bytes; 4392 packets = ring->stats.packets; 4393 } while (u64_stats_fetch_retry(&ring->syncp, start)); 4394 stats->tx_bytes += bytes; 4395 stats->tx_packets += packets; 4396 } 4397 } 4398 4399 static void ixgbevf_get_stats(struct net_device *netdev, 4400 struct rtnl_link_stats64 *stats) 4401 { 4402 struct ixgbevf_adapter *adapter = netdev_priv(netdev); 4403 unsigned int start; 4404 u64 bytes, packets; 4405 const struct ixgbevf_ring *ring; 4406 int i; 4407 4408 ixgbevf_update_stats(adapter); 4409 4410 stats->multicast = adapter->stats.vfmprc - adapter->stats.base_vfmprc; 4411 4412 rcu_read_lock(); 4413 for (i = 0; i < adapter->num_rx_queues; i++) { 4414 ring = adapter->rx_ring[i]; 4415 do { 4416 start = u64_stats_fetch_begin(&ring->syncp); 4417 bytes = ring->stats.bytes; 4418 packets = ring->stats.packets; 4419 } while (u64_stats_fetch_retry(&ring->syncp, start)); 4420 stats->rx_bytes += bytes; 4421 stats->rx_packets += packets; 4422 } 4423 4424 for (i = 0; i < adapter->num_tx_queues; i++) { 4425 ring = adapter->tx_ring[i]; 4426 ixgbevf_get_tx_ring_stats(stats, ring); 4427 } 4428 4429 for (i = 0; i < adapter->num_xdp_queues; i++) { 4430 ring = adapter->xdp_ring[i]; 4431 ixgbevf_get_tx_ring_stats(stats, ring); 4432 } 4433 rcu_read_unlock(); 4434 } 4435 4436 #define IXGBEVF_MAX_MAC_HDR_LEN 127 4437 #define IXGBEVF_MAX_NETWORK_HDR_LEN 511 4438 4439 static netdev_features_t 4440 ixgbevf_features_check(struct sk_buff *skb, struct net_device *dev, 4441 netdev_features_t features) 4442 { 4443 unsigned int network_hdr_len, mac_hdr_len; 4444 4445 /* Make certain the headers can be described by a context descriptor */ 4446 mac_hdr_len = skb_network_offset(skb); 4447 if (unlikely(mac_hdr_len > IXGBEVF_MAX_MAC_HDR_LEN)) 4448 return features & ~(NETIF_F_HW_CSUM | 4449 NETIF_F_SCTP_CRC | 4450 NETIF_F_HW_VLAN_CTAG_TX | 4451 NETIF_F_TSO | 4452 NETIF_F_TSO6); 4453 4454 network_hdr_len = skb_checksum_start(skb) - skb_network_header(skb); 4455 if (unlikely(network_hdr_len > IXGBEVF_MAX_NETWORK_HDR_LEN)) 4456 return features & ~(NETIF_F_HW_CSUM | 4457 NETIF_F_SCTP_CRC | 4458 NETIF_F_TSO | 4459 NETIF_F_TSO6); 4460 4461 /* We can only support IPV4 TSO in tunnels if we can mangle the 4462 * inner IP ID field, so strip TSO if MANGLEID is not supported. 4463 */ 4464 if (skb->encapsulation && !(features & NETIF_F_TSO_MANGLEID)) 4465 features &= ~NETIF_F_TSO; 4466 4467 return features; 4468 } 4469 4470 static int ixgbevf_xdp_setup(struct net_device *dev, struct bpf_prog *prog) 4471 { 4472 int i, frame_size = dev->mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN; 4473 struct ixgbevf_adapter *adapter = netdev_priv(dev); 4474 struct bpf_prog *old_prog; 4475 4476 /* verify ixgbevf ring attributes are sufficient for XDP */ 4477 for (i = 0; i < adapter->num_rx_queues; i++) { 4478 struct ixgbevf_ring *ring = adapter->rx_ring[i]; 4479 4480 if (frame_size > ixgbevf_rx_bufsz(ring)) 4481 return -EINVAL; 4482 } 4483 4484 old_prog = xchg(&adapter->xdp_prog, prog); 4485 4486 /* If transitioning XDP modes reconfigure rings */ 4487 if (!!prog != !!old_prog) { 4488 /* Hardware has to reinitialize queues and interrupts to 4489 * match packet buffer alignment. Unfortunately, the 4490 * hardware is not flexible enough to do this dynamically. 4491 */ 4492 if (netif_running(dev)) 4493 ixgbevf_close(dev); 4494 4495 ixgbevf_clear_interrupt_scheme(adapter); 4496 ixgbevf_init_interrupt_scheme(adapter); 4497 4498 if (netif_running(dev)) 4499 ixgbevf_open(dev); 4500 } else { 4501 for (i = 0; i < adapter->num_rx_queues; i++) 4502 xchg(&adapter->rx_ring[i]->xdp_prog, adapter->xdp_prog); 4503 } 4504 4505 if (old_prog) 4506 bpf_prog_put(old_prog); 4507 4508 return 0; 4509 } 4510 4511 static int ixgbevf_xdp(struct net_device *dev, struct netdev_bpf *xdp) 4512 { 4513 switch (xdp->command) { 4514 case XDP_SETUP_PROG: 4515 return ixgbevf_xdp_setup(dev, xdp->prog); 4516 default: 4517 return -EINVAL; 4518 } 4519 } 4520 4521 static const struct net_device_ops ixgbevf_netdev_ops = { 4522 .ndo_open = ixgbevf_open, 4523 .ndo_stop = ixgbevf_close, 4524 .ndo_start_xmit = ixgbevf_xmit_frame, 4525 .ndo_set_rx_mode = ixgbevf_set_rx_mode, 4526 .ndo_get_stats64 = ixgbevf_get_stats, 4527 .ndo_validate_addr = eth_validate_addr, 4528 .ndo_set_mac_address = ixgbevf_set_mac, 4529 .ndo_change_mtu = ixgbevf_change_mtu, 4530 .ndo_tx_timeout = ixgbevf_tx_timeout, 4531 .ndo_vlan_rx_add_vid = ixgbevf_vlan_rx_add_vid, 4532 .ndo_vlan_rx_kill_vid = ixgbevf_vlan_rx_kill_vid, 4533 .ndo_features_check = ixgbevf_features_check, 4534 .ndo_bpf = ixgbevf_xdp, 4535 }; 4536 4537 static void ixgbevf_assign_netdev_ops(struct net_device *dev) 4538 { 4539 dev->netdev_ops = &ixgbevf_netdev_ops; 4540 ixgbevf_set_ethtool_ops(dev); 4541 dev->watchdog_timeo = 5 * HZ; 4542 } 4543 4544 /** 4545 * ixgbevf_probe - Device Initialization Routine 4546 * @pdev: PCI device information struct 4547 * @ent: entry in ixgbevf_pci_tbl 4548 * 4549 * Returns 0 on success, negative on failure 4550 * 4551 * ixgbevf_probe initializes an adapter identified by a pci_dev structure. 4552 * The OS initialization, configuring of the adapter private structure, 4553 * and a hardware reset occur. 4554 **/ 4555 static int ixgbevf_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 4556 { 4557 struct net_device *netdev; 4558 struct ixgbevf_adapter *adapter = NULL; 4559 struct ixgbe_hw *hw = NULL; 4560 const struct ixgbevf_info *ii = ixgbevf_info_tbl[ent->driver_data]; 4561 bool disable_dev = false; 4562 int err; 4563 4564 err = pci_enable_device(pdev); 4565 if (err) 4566 return err; 4567 4568 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); 4569 if (err) { 4570 dev_err(&pdev->dev, "No usable DMA configuration, aborting\n"); 4571 goto err_dma; 4572 } 4573 4574 err = pci_request_regions(pdev, ixgbevf_driver_name); 4575 if (err) { 4576 dev_err(&pdev->dev, "pci_request_regions failed 0x%x\n", err); 4577 goto err_pci_reg; 4578 } 4579 4580 pci_set_master(pdev); 4581 4582 netdev = alloc_etherdev_mq(sizeof(struct ixgbevf_adapter), 4583 MAX_TX_QUEUES); 4584 if (!netdev) { 4585 err = -ENOMEM; 4586 goto err_alloc_etherdev; 4587 } 4588 4589 SET_NETDEV_DEV(netdev, &pdev->dev); 4590 4591 adapter = netdev_priv(netdev); 4592 4593 adapter->netdev = netdev; 4594 adapter->pdev = pdev; 4595 hw = &adapter->hw; 4596 hw->back = adapter; 4597 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE); 4598 4599 /* call save state here in standalone driver because it relies on 4600 * adapter struct to exist, and needs to call netdev_priv 4601 */ 4602 pci_save_state(pdev); 4603 4604 hw->hw_addr = ioremap(pci_resource_start(pdev, 0), 4605 pci_resource_len(pdev, 0)); 4606 adapter->io_addr = hw->hw_addr; 4607 if (!hw->hw_addr) { 4608 err = -EIO; 4609 goto err_ioremap; 4610 } 4611 4612 ixgbevf_assign_netdev_ops(netdev); 4613 4614 /* Setup HW API */ 4615 memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops)); 4616 hw->mac.type = ii->mac; 4617 4618 memcpy(&hw->mbx.ops, &ixgbevf_mbx_ops_legacy, 4619 sizeof(struct ixgbe_mbx_operations)); 4620 4621 /* setup the private structure */ 4622 err = ixgbevf_sw_init(adapter); 4623 if (err) 4624 goto err_sw_init; 4625 4626 /* The HW MAC address was set and/or determined in sw_init */ 4627 if (!is_valid_ether_addr(netdev->dev_addr)) { 4628 pr_err("invalid MAC address\n"); 4629 err = -EIO; 4630 goto err_sw_init; 4631 } 4632 4633 netdev->hw_features = NETIF_F_SG | 4634 NETIF_F_TSO | 4635 NETIF_F_TSO6 | 4636 NETIF_F_RXCSUM | 4637 NETIF_F_HW_CSUM | 4638 NETIF_F_SCTP_CRC; 4639 4640 #define IXGBEVF_GSO_PARTIAL_FEATURES (NETIF_F_GSO_GRE | \ 4641 NETIF_F_GSO_GRE_CSUM | \ 4642 NETIF_F_GSO_IPXIP4 | \ 4643 NETIF_F_GSO_IPXIP6 | \ 4644 NETIF_F_GSO_UDP_TUNNEL | \ 4645 NETIF_F_GSO_UDP_TUNNEL_CSUM) 4646 4647 netdev->gso_partial_features = IXGBEVF_GSO_PARTIAL_FEATURES; 4648 netdev->hw_features |= NETIF_F_GSO_PARTIAL | 4649 IXGBEVF_GSO_PARTIAL_FEATURES; 4650 4651 netdev->features = netdev->hw_features | NETIF_F_HIGHDMA; 4652 4653 netdev->vlan_features |= netdev->features | NETIF_F_TSO_MANGLEID; 4654 netdev->mpls_features |= NETIF_F_SG | 4655 NETIF_F_TSO | 4656 NETIF_F_TSO6 | 4657 NETIF_F_HW_CSUM; 4658 netdev->mpls_features |= IXGBEVF_GSO_PARTIAL_FEATURES; 4659 netdev->hw_enc_features |= netdev->vlan_features; 4660 4661 /* set this bit last since it cannot be part of vlan_features */ 4662 netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER | 4663 NETIF_F_HW_VLAN_CTAG_RX | 4664 NETIF_F_HW_VLAN_CTAG_TX; 4665 4666 netdev->priv_flags |= IFF_UNICAST_FLT; 4667 netdev->xdp_features = NETDEV_XDP_ACT_BASIC; 4668 4669 /* MTU range: 68 - 1504 or 9710 */ 4670 netdev->min_mtu = ETH_MIN_MTU; 4671 switch (adapter->hw.api_version) { 4672 case ixgbe_mbox_api_11: 4673 case ixgbe_mbox_api_12: 4674 case ixgbe_mbox_api_13: 4675 case ixgbe_mbox_api_14: 4676 case ixgbe_mbox_api_15: 4677 case ixgbe_mbox_api_16: 4678 case ixgbe_mbox_api_17: 4679 netdev->max_mtu = IXGBE_MAX_JUMBO_FRAME_SIZE - 4680 (ETH_HLEN + ETH_FCS_LEN); 4681 break; 4682 default: 4683 if (adapter->hw.mac.type != ixgbe_mac_82599_vf) 4684 netdev->max_mtu = IXGBE_MAX_JUMBO_FRAME_SIZE - 4685 (ETH_HLEN + ETH_FCS_LEN); 4686 else 4687 netdev->max_mtu = ETH_DATA_LEN + ETH_FCS_LEN; 4688 break; 4689 } 4690 4691 if (IXGBE_REMOVED(hw->hw_addr)) { 4692 err = -EIO; 4693 goto err_sw_init; 4694 } 4695 4696 timer_setup(&adapter->service_timer, ixgbevf_service_timer, 0); 4697 4698 INIT_WORK(&adapter->service_task, ixgbevf_service_task); 4699 set_bit(__IXGBEVF_SERVICE_INITED, &adapter->state); 4700 clear_bit(__IXGBEVF_SERVICE_SCHED, &adapter->state); 4701 4702 err = ixgbevf_init_interrupt_scheme(adapter); 4703 if (err) 4704 goto err_sw_init; 4705 4706 strcpy(netdev->name, "eth%d"); 4707 4708 err = register_netdev(netdev); 4709 if (err) 4710 goto err_register; 4711 4712 pci_set_drvdata(pdev, netdev); 4713 netif_carrier_off(netdev); 4714 ixgbevf_init_ipsec_offload(adapter); 4715 4716 ixgbevf_init_last_counter_stats(adapter); 4717 4718 /* print the VF info */ 4719 dev_info(&pdev->dev, "%pM\n", netdev->dev_addr); 4720 dev_info(&pdev->dev, "MAC: %d\n", hw->mac.type); 4721 4722 switch (hw->mac.type) { 4723 case ixgbe_mac_X550_vf: 4724 dev_info(&pdev->dev, "Intel(R) X550 Virtual Function\n"); 4725 break; 4726 case ixgbe_mac_X540_vf: 4727 dev_info(&pdev->dev, "Intel(R) X540 Virtual Function\n"); 4728 break; 4729 case ixgbe_mac_e610_vf: 4730 dev_info(&pdev->dev, "Intel(R) E610 Virtual Function\n"); 4731 break; 4732 case ixgbe_mac_82599_vf: 4733 default: 4734 dev_info(&pdev->dev, "Intel(R) 82599 Virtual Function\n"); 4735 break; 4736 } 4737 4738 return 0; 4739 4740 err_register: 4741 ixgbevf_clear_interrupt_scheme(adapter); 4742 err_sw_init: 4743 ixgbevf_reset_interrupt_capability(adapter); 4744 iounmap(adapter->io_addr); 4745 kfree(adapter->rss_key); 4746 err_ioremap: 4747 disable_dev = !test_and_set_bit(__IXGBEVF_DISABLED, &adapter->state); 4748 free_netdev(netdev); 4749 err_alloc_etherdev: 4750 pci_release_regions(pdev); 4751 err_pci_reg: 4752 err_dma: 4753 if (!adapter || disable_dev) 4754 pci_disable_device(pdev); 4755 return err; 4756 } 4757 4758 /** 4759 * ixgbevf_remove - Device Removal Routine 4760 * @pdev: PCI device information struct 4761 * 4762 * ixgbevf_remove is called by the PCI subsystem to alert the driver 4763 * that it should release a PCI device. The could be caused by a 4764 * Hot-Plug event, or because the driver is going to be removed from 4765 * memory. 4766 **/ 4767 static void ixgbevf_remove(struct pci_dev *pdev) 4768 { 4769 struct net_device *netdev = pci_get_drvdata(pdev); 4770 struct ixgbevf_adapter *adapter; 4771 bool disable_dev; 4772 4773 if (!netdev) 4774 return; 4775 4776 adapter = netdev_priv(netdev); 4777 4778 set_bit(__IXGBEVF_REMOVING, &adapter->state); 4779 cancel_work_sync(&adapter->service_task); 4780 4781 if (netdev->reg_state == NETREG_REGISTERED) 4782 unregister_netdev(netdev); 4783 4784 ixgbevf_stop_ipsec_offload(adapter); 4785 ixgbevf_clear_interrupt_scheme(adapter); 4786 ixgbevf_reset_interrupt_capability(adapter); 4787 4788 iounmap(adapter->io_addr); 4789 pci_release_regions(pdev); 4790 4791 hw_dbg(&adapter->hw, "Remove complete\n"); 4792 4793 kfree(adapter->rss_key); 4794 disable_dev = !test_and_set_bit(__IXGBEVF_DISABLED, &adapter->state); 4795 free_netdev(netdev); 4796 4797 if (disable_dev) 4798 pci_disable_device(pdev); 4799 } 4800 4801 /** 4802 * ixgbevf_io_error_detected - called when PCI error is detected 4803 * @pdev: Pointer to PCI device 4804 * @state: The current pci connection state 4805 * 4806 * This function is called after a PCI bus error affecting 4807 * this device has been detected. 4808 **/ 4809 static pci_ers_result_t ixgbevf_io_error_detected(struct pci_dev *pdev, 4810 pci_channel_state_t state) 4811 { 4812 struct net_device *netdev = pci_get_drvdata(pdev); 4813 struct ixgbevf_adapter *adapter = netdev_priv(netdev); 4814 4815 if (!test_bit(__IXGBEVF_SERVICE_INITED, &adapter->state)) 4816 return PCI_ERS_RESULT_DISCONNECT; 4817 4818 rtnl_lock(); 4819 netif_device_detach(netdev); 4820 4821 if (netif_running(netdev)) 4822 ixgbevf_close_suspend(adapter); 4823 4824 if (state == pci_channel_io_perm_failure) { 4825 rtnl_unlock(); 4826 return PCI_ERS_RESULT_DISCONNECT; 4827 } 4828 4829 if (!test_and_set_bit(__IXGBEVF_DISABLED, &adapter->state)) 4830 pci_disable_device(pdev); 4831 rtnl_unlock(); 4832 4833 /* Request a slot reset. */ 4834 return PCI_ERS_RESULT_NEED_RESET; 4835 } 4836 4837 /** 4838 * ixgbevf_io_slot_reset - called after the pci bus has been reset. 4839 * @pdev: Pointer to PCI device 4840 * 4841 * Restart the card from scratch, as if from a cold-boot. Implementation 4842 * resembles the first-half of the ixgbevf_resume routine. 4843 **/ 4844 static pci_ers_result_t ixgbevf_io_slot_reset(struct pci_dev *pdev) 4845 { 4846 struct net_device *netdev = pci_get_drvdata(pdev); 4847 struct ixgbevf_adapter *adapter = netdev_priv(netdev); 4848 4849 if (pci_enable_device_mem(pdev)) { 4850 dev_err(&pdev->dev, 4851 "Cannot re-enable PCI device after reset.\n"); 4852 return PCI_ERS_RESULT_DISCONNECT; 4853 } 4854 4855 adapter->hw.hw_addr = adapter->io_addr; 4856 smp_mb__before_atomic(); 4857 clear_bit(__IXGBEVF_DISABLED, &adapter->state); 4858 pci_set_master(pdev); 4859 4860 ixgbevf_reset(adapter); 4861 4862 return PCI_ERS_RESULT_RECOVERED; 4863 } 4864 4865 /** 4866 * ixgbevf_io_resume - called when traffic can start flowing again. 4867 * @pdev: Pointer to PCI device 4868 * 4869 * This callback is called when the error recovery driver tells us that 4870 * its OK to resume normal operation. Implementation resembles the 4871 * second-half of the ixgbevf_resume routine. 4872 **/ 4873 static void ixgbevf_io_resume(struct pci_dev *pdev) 4874 { 4875 struct net_device *netdev = pci_get_drvdata(pdev); 4876 4877 rtnl_lock(); 4878 if (netif_running(netdev)) 4879 ixgbevf_open(netdev); 4880 4881 netif_device_attach(netdev); 4882 rtnl_unlock(); 4883 } 4884 4885 /* PCI Error Recovery (ERS) */ 4886 static const struct pci_error_handlers ixgbevf_err_handler = { 4887 .error_detected = ixgbevf_io_error_detected, 4888 .slot_reset = ixgbevf_io_slot_reset, 4889 .resume = ixgbevf_io_resume, 4890 }; 4891 4892 static DEFINE_SIMPLE_DEV_PM_OPS(ixgbevf_pm_ops, ixgbevf_suspend, ixgbevf_resume); 4893 4894 static struct pci_driver ixgbevf_driver = { 4895 .name = ixgbevf_driver_name, 4896 .id_table = ixgbevf_pci_tbl, 4897 .probe = ixgbevf_probe, 4898 .remove = ixgbevf_remove, 4899 4900 /* Power Management Hooks */ 4901 .driver.pm = pm_sleep_ptr(&ixgbevf_pm_ops), 4902 4903 .shutdown = ixgbevf_shutdown, 4904 .err_handler = &ixgbevf_err_handler 4905 }; 4906 4907 /** 4908 * ixgbevf_init_module - Driver Registration Routine 4909 * 4910 * ixgbevf_init_module is the first routine called when the driver is 4911 * loaded. All it does is register with the PCI subsystem. 4912 **/ 4913 static int __init ixgbevf_init_module(void) 4914 { 4915 int err; 4916 4917 pr_info("%s\n", ixgbevf_driver_string); 4918 pr_info("%s\n", ixgbevf_copyright); 4919 ixgbevf_wq = create_singlethread_workqueue(ixgbevf_driver_name); 4920 if (!ixgbevf_wq) { 4921 pr_err("%s: Failed to create workqueue\n", ixgbevf_driver_name); 4922 return -ENOMEM; 4923 } 4924 4925 err = pci_register_driver(&ixgbevf_driver); 4926 if (err) { 4927 destroy_workqueue(ixgbevf_wq); 4928 return err; 4929 } 4930 4931 return 0; 4932 } 4933 4934 module_init(ixgbevf_init_module); 4935 4936 /** 4937 * ixgbevf_exit_module - Driver Exit Cleanup Routine 4938 * 4939 * ixgbevf_exit_module is called just before the driver is removed 4940 * from memory. 4941 **/ 4942 static void __exit ixgbevf_exit_module(void) 4943 { 4944 pci_unregister_driver(&ixgbevf_driver); 4945 if (ixgbevf_wq) { 4946 destroy_workqueue(ixgbevf_wq); 4947 ixgbevf_wq = NULL; 4948 } 4949 } 4950 4951 #ifdef DEBUG 4952 /** 4953 * ixgbevf_get_hw_dev_name - return device name string 4954 * used by hardware layer to print debugging information 4955 * @hw: pointer to private hardware struct 4956 **/ 4957 char *ixgbevf_get_hw_dev_name(struct ixgbe_hw *hw) 4958 { 4959 struct ixgbevf_adapter *adapter = hw->back; 4960 4961 return adapter->netdev->name; 4962 } 4963 4964 #endif 4965 module_exit(ixgbevf_exit_module); 4966 4967 /* ixgbevf_main.c */ 4968