ixgbevf_main.c revision 46acc460c07b5c74287560a00b6cbc6111136ab6
1/******************************************************************************* 2 3 Intel 82599 Virtual Function driver 4 Copyright(c) 1999 - 2012 Intel Corporation. 5 6 This program is free software; you can redistribute it and/or modify it 7 under the terms and conditions of the GNU General Public License, 8 version 2, as published by the Free Software Foundation. 9 10 This program is distributed in the hope it will be useful, but WITHOUT 11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 13 more details. 14 15 You should have received a copy of the GNU General Public License along with 16 this program; if not, write to the Free Software Foundation, Inc., 17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. 18 19 The full GNU General Public License is included in this distribution in 20 the file called "COPYING". 21 22 Contact Information: 23 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net> 24 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 25 26*******************************************************************************/ 27 28 29/****************************************************************************** 30 Copyright (c)2006 - 2007 Myricom, Inc. for some LRO specific code 31******************************************************************************/ 32 33#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 34 35#include <linux/types.h> 36#include <linux/bitops.h> 37#include <linux/module.h> 38#include <linux/pci.h> 39#include <linux/netdevice.h> 40#include <linux/vmalloc.h> 41#include <linux/string.h> 42#include <linux/in.h> 43#include <linux/ip.h> 44#include <linux/tcp.h> 45#include <linux/sctp.h> 46#include <linux/ipv6.h> 47#include <linux/slab.h> 48#include <net/checksum.h> 49#include <net/ip6_checksum.h> 50#include <linux/ethtool.h> 51#include <linux/if.h> 52#include <linux/if_vlan.h> 53#include <linux/prefetch.h> 54 55#include "ixgbevf.h" 56 57const char ixgbevf_driver_name[] = "ixgbevf"; 58static const char ixgbevf_driver_string[] = 59 "Intel(R) 10 Gigabit PCI Express Virtual Function Network Driver"; 60 61#define DRV_VERSION "2.7.12-k" 62const char ixgbevf_driver_version[] = DRV_VERSION; 63static char ixgbevf_copyright[] = 64 "Copyright (c) 2009 - 2012 Intel Corporation."; 65 66static const struct ixgbevf_info *ixgbevf_info_tbl[] = { 67 [board_82599_vf] = &ixgbevf_82599_vf_info, 68 [board_X540_vf] = &ixgbevf_X540_vf_info, 69}; 70 71/* ixgbevf_pci_tbl - PCI Device ID Table 72 * 73 * Wildcard entries (PCI_ANY_ID) should come last 74 * Last entry must be all 0s 75 * 76 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID, 77 * Class, Class Mask, private data (not used) } 78 */ 79static struct pci_device_id ixgbevf_pci_tbl[] = { 80 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_VF), 81 board_82599_vf}, 82 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540_VF), 83 board_X540_vf}, 84 85 /* required last entry */ 86 {0, } 87}; 88MODULE_DEVICE_TABLE(pci, ixgbevf_pci_tbl); 89 90MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>"); 91MODULE_DESCRIPTION("Intel(R) 82599 Virtual Function Driver"); 92MODULE_LICENSE("GPL"); 93MODULE_VERSION(DRV_VERSION); 94 95#define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK) 96static int debug = -1; 97module_param(debug, int, 0); 98MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); 99 100/* forward decls */ 101static void ixgbevf_set_itr(struct ixgbevf_q_vector *q_vector); 102static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter *adapter); 103 104static inline void ixgbevf_release_rx_desc(struct ixgbe_hw *hw, 105 struct ixgbevf_ring *rx_ring, 106 u32 val) 107{ 108 /* 109 * Force memory writes to complete before letting h/w 110 * know there are new descriptors to fetch. (Only 111 * applicable for weak-ordered memory model archs, 112 * such as IA-64). 113 */ 114 wmb(); 115 IXGBE_WRITE_REG(hw, IXGBE_VFRDT(rx_ring->reg_idx), val); 116} 117 118/** 119 * ixgbevf_set_ivar - set IVAR registers - maps interrupt causes to vectors 120 * @adapter: pointer to adapter struct 121 * @direction: 0 for Rx, 1 for Tx, -1 for other causes 122 * @queue: queue to map the corresponding interrupt to 123 * @msix_vector: the vector to map to the corresponding queue 124 * 125 */ 126static void ixgbevf_set_ivar(struct ixgbevf_adapter *adapter, s8 direction, 127 u8 queue, u8 msix_vector) 128{ 129 u32 ivar, index; 130 struct ixgbe_hw *hw = &adapter->hw; 131 if (direction == -1) { 132 /* other causes */ 133 msix_vector |= IXGBE_IVAR_ALLOC_VAL; 134 ivar = IXGBE_READ_REG(hw, IXGBE_VTIVAR_MISC); 135 ivar &= ~0xFF; 136 ivar |= msix_vector; 137 IXGBE_WRITE_REG(hw, IXGBE_VTIVAR_MISC, ivar); 138 } else { 139 /* tx or rx causes */ 140 msix_vector |= IXGBE_IVAR_ALLOC_VAL; 141 index = ((16 * (queue & 1)) + (8 * direction)); 142 ivar = IXGBE_READ_REG(hw, IXGBE_VTIVAR(queue >> 1)); 143 ivar &= ~(0xFF << index); 144 ivar |= (msix_vector << index); 145 IXGBE_WRITE_REG(hw, IXGBE_VTIVAR(queue >> 1), ivar); 146 } 147} 148 149static void ixgbevf_unmap_and_free_tx_resource(struct ixgbevf_ring *tx_ring, 150 struct ixgbevf_tx_buffer 151 *tx_buffer_info) 152{ 153 if (tx_buffer_info->dma) { 154 if (tx_buffer_info->mapped_as_page) 155 dma_unmap_page(tx_ring->dev, 156 tx_buffer_info->dma, 157 tx_buffer_info->length, 158 DMA_TO_DEVICE); 159 else 160 dma_unmap_single(tx_ring->dev, 161 tx_buffer_info->dma, 162 tx_buffer_info->length, 163 DMA_TO_DEVICE); 164 tx_buffer_info->dma = 0; 165 } 166 if (tx_buffer_info->skb) { 167 dev_kfree_skb_any(tx_buffer_info->skb); 168 tx_buffer_info->skb = NULL; 169 } 170 tx_buffer_info->time_stamp = 0; 171 /* tx_buffer_info must be completely set up in the transmit path */ 172} 173 174#define IXGBE_MAX_TXD_PWR 14 175#define IXGBE_MAX_DATA_PER_TXD (1 << IXGBE_MAX_TXD_PWR) 176 177/* Tx Descriptors needed, worst case */ 178#define TXD_USE_COUNT(S) DIV_ROUND_UP((S), IXGBE_MAX_DATA_PER_TXD) 179#define DESC_NEEDED (MAX_SKB_FRAGS + 4) 180 181static void ixgbevf_tx_timeout(struct net_device *netdev); 182 183/** 184 * ixgbevf_clean_tx_irq - Reclaim resources after transmit completes 185 * @q_vector: board private structure 186 * @tx_ring: tx ring to clean 187 **/ 188static bool ixgbevf_clean_tx_irq(struct ixgbevf_q_vector *q_vector, 189 struct ixgbevf_ring *tx_ring) 190{ 191 struct ixgbevf_adapter *adapter = q_vector->adapter; 192 union ixgbe_adv_tx_desc *tx_desc, *eop_desc; 193 struct ixgbevf_tx_buffer *tx_buffer_info; 194 unsigned int i, eop, count = 0; 195 unsigned int total_bytes = 0, total_packets = 0; 196 197 if (test_bit(__IXGBEVF_DOWN, &adapter->state)) 198 return true; 199 200 i = tx_ring->next_to_clean; 201 eop = tx_ring->tx_buffer_info[i].next_to_watch; 202 eop_desc = IXGBEVF_TX_DESC(tx_ring, eop); 203 204 while ((eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)) && 205 (count < tx_ring->count)) { 206 bool cleaned = false; 207 rmb(); /* read buffer_info after eop_desc */ 208 /* eop could change between read and DD-check */ 209 if (unlikely(eop != tx_ring->tx_buffer_info[i].next_to_watch)) 210 goto cont_loop; 211 for ( ; !cleaned; count++) { 212 struct sk_buff *skb; 213 tx_desc = IXGBEVF_TX_DESC(tx_ring, i); 214 tx_buffer_info = &tx_ring->tx_buffer_info[i]; 215 cleaned = (i == eop); 216 skb = tx_buffer_info->skb; 217 218 if (cleaned && skb) { 219 unsigned int segs, bytecount; 220 221 /* gso_segs is currently only valid for tcp */ 222 segs = skb_shinfo(skb)->gso_segs ?: 1; 223 /* multiply data chunks by size of headers */ 224 bytecount = ((segs - 1) * skb_headlen(skb)) + 225 skb->len; 226 total_packets += segs; 227 total_bytes += bytecount; 228 } 229 230 ixgbevf_unmap_and_free_tx_resource(tx_ring, 231 tx_buffer_info); 232 233 tx_desc->wb.status = 0; 234 235 i++; 236 if (i == tx_ring->count) 237 i = 0; 238 } 239 240cont_loop: 241 eop = tx_ring->tx_buffer_info[i].next_to_watch; 242 eop_desc = IXGBEVF_TX_DESC(tx_ring, eop); 243 } 244 245 tx_ring->next_to_clean = i; 246 247#define TX_WAKE_THRESHOLD (DESC_NEEDED * 2) 248 if (unlikely(count && netif_carrier_ok(tx_ring->netdev) && 249 (IXGBE_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD))) { 250 /* Make sure that anybody stopping the queue after this 251 * sees the new next_to_clean. 252 */ 253 smp_mb(); 254 if (__netif_subqueue_stopped(tx_ring->netdev, 255 tx_ring->queue_index) && 256 !test_bit(__IXGBEVF_DOWN, &adapter->state)) { 257 netif_wake_subqueue(tx_ring->netdev, 258 tx_ring->queue_index); 259 ++adapter->restart_queue; 260 } 261 } 262 263 u64_stats_update_begin(&tx_ring->syncp); 264 tx_ring->total_bytes += total_bytes; 265 tx_ring->total_packets += total_packets; 266 u64_stats_update_end(&tx_ring->syncp); 267 q_vector->tx.total_bytes += total_bytes; 268 q_vector->tx.total_packets += total_packets; 269 270 return count < tx_ring->count; 271} 272 273/** 274 * ixgbevf_receive_skb - Send a completed packet up the stack 275 * @q_vector: structure containing interrupt and ring information 276 * @skb: packet to send up 277 * @status: hardware indication of status of receive 278 * @rx_desc: rx descriptor 279 **/ 280static void ixgbevf_receive_skb(struct ixgbevf_q_vector *q_vector, 281 struct sk_buff *skb, u8 status, 282 union ixgbe_adv_rx_desc *rx_desc) 283{ 284 struct ixgbevf_adapter *adapter = q_vector->adapter; 285 bool is_vlan = (status & IXGBE_RXD_STAT_VP); 286 u16 tag = le16_to_cpu(rx_desc->wb.upper.vlan); 287 288 if (is_vlan && test_bit(tag & VLAN_VID_MASK, adapter->active_vlans)) 289 __vlan_hwaccel_put_tag(skb, tag); 290 291 napi_gro_receive(&q_vector->napi, skb); 292} 293 294/** 295 * ixgbevf_rx_checksum - indicate in skb if hw indicated a good cksum 296 * @adapter: address of board private structure 297 * @status_err: hardware indication of status of receive 298 * @skb: skb currently being received and modified 299 **/ 300static inline void ixgbevf_rx_checksum(struct ixgbevf_adapter *adapter, 301 struct ixgbevf_ring *ring, 302 u32 status_err, struct sk_buff *skb) 303{ 304 skb_checksum_none_assert(skb); 305 306 /* Rx csum disabled */ 307 if (!(ring->netdev->features & NETIF_F_RXCSUM)) 308 return; 309 310 /* if IP and error */ 311 if ((status_err & IXGBE_RXD_STAT_IPCS) && 312 (status_err & IXGBE_RXDADV_ERR_IPE)) { 313 adapter->hw_csum_rx_error++; 314 return; 315 } 316 317 if (!(status_err & IXGBE_RXD_STAT_L4CS)) 318 return; 319 320 if (status_err & IXGBE_RXDADV_ERR_TCPE) { 321 adapter->hw_csum_rx_error++; 322 return; 323 } 324 325 /* It must be a TCP or UDP packet with a valid checksum */ 326 skb->ip_summed = CHECKSUM_UNNECESSARY; 327 adapter->hw_csum_rx_good++; 328} 329 330/** 331 * ixgbevf_alloc_rx_buffers - Replace used receive buffers; packet split 332 * @adapter: address of board private structure 333 **/ 334static void ixgbevf_alloc_rx_buffers(struct ixgbevf_adapter *adapter, 335 struct ixgbevf_ring *rx_ring, 336 int cleaned_count) 337{ 338 struct pci_dev *pdev = adapter->pdev; 339 union ixgbe_adv_rx_desc *rx_desc; 340 struct ixgbevf_rx_buffer *bi; 341 struct sk_buff *skb; 342 unsigned int i = rx_ring->next_to_use; 343 344 bi = &rx_ring->rx_buffer_info[i]; 345 346 while (cleaned_count--) { 347 rx_desc = IXGBEVF_RX_DESC(rx_ring, i); 348 skb = bi->skb; 349 if (!skb) { 350 skb = netdev_alloc_skb_ip_align(rx_ring->netdev, 351 rx_ring->rx_buf_len); 352 if (!skb) { 353 adapter->alloc_rx_buff_failed++; 354 goto no_buffers; 355 } 356 bi->skb = skb; 357 } 358 if (!bi->dma) { 359 bi->dma = dma_map_single(&pdev->dev, skb->data, 360 rx_ring->rx_buf_len, 361 DMA_FROM_DEVICE); 362 if (dma_mapping_error(&pdev->dev, bi->dma)) { 363 dev_kfree_skb(skb); 364 bi->skb = NULL; 365 dev_err(&pdev->dev, "RX DMA map failed\n"); 366 break; 367 } 368 } 369 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma); 370 371 i++; 372 if (i == rx_ring->count) 373 i = 0; 374 bi = &rx_ring->rx_buffer_info[i]; 375 } 376 377no_buffers: 378 if (rx_ring->next_to_use != i) { 379 rx_ring->next_to_use = i; 380 381 ixgbevf_release_rx_desc(&adapter->hw, rx_ring, i); 382 } 383} 384 385static inline void ixgbevf_irq_enable_queues(struct ixgbevf_adapter *adapter, 386 u32 qmask) 387{ 388 struct ixgbe_hw *hw = &adapter->hw; 389 390 IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, qmask); 391} 392 393static bool ixgbevf_clean_rx_irq(struct ixgbevf_q_vector *q_vector, 394 struct ixgbevf_ring *rx_ring, 395 int budget) 396{ 397 struct ixgbevf_adapter *adapter = q_vector->adapter; 398 struct pci_dev *pdev = adapter->pdev; 399 union ixgbe_adv_rx_desc *rx_desc, *next_rxd; 400 struct ixgbevf_rx_buffer *rx_buffer_info, *next_buffer; 401 struct sk_buff *skb; 402 unsigned int i; 403 u32 len, staterr; 404 int cleaned_count = 0; 405 unsigned int total_rx_bytes = 0, total_rx_packets = 0; 406 407 i = rx_ring->next_to_clean; 408 rx_desc = IXGBEVF_RX_DESC(rx_ring, i); 409 staterr = le32_to_cpu(rx_desc->wb.upper.status_error); 410 rx_buffer_info = &rx_ring->rx_buffer_info[i]; 411 412 while (staterr & IXGBE_RXD_STAT_DD) { 413 if (!budget) 414 break; 415 budget--; 416 417 rmb(); /* read descriptor and rx_buffer_info after status DD */ 418 len = le16_to_cpu(rx_desc->wb.upper.length); 419 skb = rx_buffer_info->skb; 420 prefetch(skb->data - NET_IP_ALIGN); 421 rx_buffer_info->skb = NULL; 422 423 if (rx_buffer_info->dma) { 424 dma_unmap_single(&pdev->dev, rx_buffer_info->dma, 425 rx_ring->rx_buf_len, 426 DMA_FROM_DEVICE); 427 rx_buffer_info->dma = 0; 428 skb_put(skb, len); 429 } 430 431 i++; 432 if (i == rx_ring->count) 433 i = 0; 434 435 next_rxd = IXGBEVF_RX_DESC(rx_ring, i); 436 prefetch(next_rxd); 437 cleaned_count++; 438 439 next_buffer = &rx_ring->rx_buffer_info[i]; 440 441 if (!(staterr & IXGBE_RXD_STAT_EOP)) { 442 skb->next = next_buffer->skb; 443 IXGBE_CB(skb->next)->prev = skb; 444 adapter->non_eop_descs++; 445 goto next_desc; 446 } 447 448 /* we should not be chaining buffers, if we did drop the skb */ 449 if (IXGBE_CB(skb)->prev) { 450 do { 451 struct sk_buff *this = skb; 452 skb = IXGBE_CB(skb)->prev; 453 dev_kfree_skb(this); 454 } while (skb); 455 goto next_desc; 456 } 457 458 /* ERR_MASK will only have valid bits if EOP set */ 459 if (unlikely(staterr & IXGBE_RXDADV_ERR_FRAME_ERR_MASK)) { 460 dev_kfree_skb_irq(skb); 461 goto next_desc; 462 } 463 464 ixgbevf_rx_checksum(adapter, rx_ring, staterr, skb); 465 466 /* probably a little skewed due to removing CRC */ 467 total_rx_bytes += skb->len; 468 total_rx_packets++; 469 470 /* 471 * Work around issue of some types of VM to VM loop back 472 * packets not getting split correctly 473 */ 474 if (staterr & IXGBE_RXD_STAT_LB) { 475 u32 header_fixup_len = skb_headlen(skb); 476 if (header_fixup_len < 14) 477 skb_push(skb, header_fixup_len); 478 } 479 skb->protocol = eth_type_trans(skb, rx_ring->netdev); 480 481 /* Workaround hardware that can't do proper VEPA multicast 482 * source pruning. 483 */ 484 if ((skb->pkt_type & (PACKET_BROADCAST | PACKET_MULTICAST)) && 485 !(compare_ether_addr(adapter->netdev->dev_addr, 486 eth_hdr(skb)->h_source))) { 487 dev_kfree_skb_irq(skb); 488 goto next_desc; 489 } 490 491 ixgbevf_receive_skb(q_vector, skb, staterr, rx_desc); 492 493next_desc: 494 rx_desc->wb.upper.status_error = 0; 495 496 /* return some buffers to hardware, one at a time is too slow */ 497 if (cleaned_count >= IXGBEVF_RX_BUFFER_WRITE) { 498 ixgbevf_alloc_rx_buffers(adapter, rx_ring, 499 cleaned_count); 500 cleaned_count = 0; 501 } 502 503 /* use prefetched values */ 504 rx_desc = next_rxd; 505 rx_buffer_info = &rx_ring->rx_buffer_info[i]; 506 507 staterr = le32_to_cpu(rx_desc->wb.upper.status_error); 508 } 509 510 rx_ring->next_to_clean = i; 511 cleaned_count = IXGBE_DESC_UNUSED(rx_ring); 512 513 if (cleaned_count) 514 ixgbevf_alloc_rx_buffers(adapter, rx_ring, cleaned_count); 515 516 u64_stats_update_begin(&rx_ring->syncp); 517 rx_ring->total_packets += total_rx_packets; 518 rx_ring->total_bytes += total_rx_bytes; 519 u64_stats_update_end(&rx_ring->syncp); 520 q_vector->rx.total_packets += total_rx_packets; 521 q_vector->rx.total_bytes += total_rx_bytes; 522 523 return !!budget; 524} 525 526/** 527 * ixgbevf_poll - NAPI polling calback 528 * @napi: napi struct with our devices info in it 529 * @budget: amount of work driver is allowed to do this pass, in packets 530 * 531 * This function will clean more than one or more rings associated with a 532 * q_vector. 533 **/ 534static int ixgbevf_poll(struct napi_struct *napi, int budget) 535{ 536 struct ixgbevf_q_vector *q_vector = 537 container_of(napi, struct ixgbevf_q_vector, napi); 538 struct ixgbevf_adapter *adapter = q_vector->adapter; 539 struct ixgbevf_ring *ring; 540 int per_ring_budget; 541 bool clean_complete = true; 542 543 ixgbevf_for_each_ring(ring, q_vector->tx) 544 clean_complete &= ixgbevf_clean_tx_irq(q_vector, ring); 545 546 /* attempt to distribute budget to each queue fairly, but don't allow 547 * the budget to go below 1 because we'll exit polling */ 548 if (q_vector->rx.count > 1) 549 per_ring_budget = max(budget/q_vector->rx.count, 1); 550 else 551 per_ring_budget = budget; 552 553 ixgbevf_for_each_ring(ring, q_vector->rx) 554 clean_complete &= ixgbevf_clean_rx_irq(q_vector, ring, 555 per_ring_budget); 556 557 /* If all work not completed, return budget and keep polling */ 558 if (!clean_complete) 559 return budget; 560 /* all work done, exit the polling mode */ 561 napi_complete(napi); 562 if (adapter->rx_itr_setting & 1) 563 ixgbevf_set_itr(q_vector); 564 if (!test_bit(__IXGBEVF_DOWN, &adapter->state)) 565 ixgbevf_irq_enable_queues(adapter, 566 1 << q_vector->v_idx); 567 568 return 0; 569} 570 571/** 572 * ixgbevf_write_eitr - write VTEITR register in hardware specific way 573 * @q_vector: structure containing interrupt and ring information 574 */ 575static void ixgbevf_write_eitr(struct ixgbevf_q_vector *q_vector) 576{ 577 struct ixgbevf_adapter *adapter = q_vector->adapter; 578 struct ixgbe_hw *hw = &adapter->hw; 579 int v_idx = q_vector->v_idx; 580 u32 itr_reg = q_vector->itr & IXGBE_MAX_EITR; 581 582 /* 583 * set the WDIS bit to not clear the timer bits and cause an 584 * immediate assertion of the interrupt 585 */ 586 itr_reg |= IXGBE_EITR_CNT_WDIS; 587 588 IXGBE_WRITE_REG(hw, IXGBE_VTEITR(v_idx), itr_reg); 589} 590 591/** 592 * ixgbevf_configure_msix - Configure MSI-X hardware 593 * @adapter: board private structure 594 * 595 * ixgbevf_configure_msix sets up the hardware to properly generate MSI-X 596 * interrupts. 597 **/ 598static void ixgbevf_configure_msix(struct ixgbevf_adapter *adapter) 599{ 600 struct ixgbevf_q_vector *q_vector; 601 int q_vectors, v_idx; 602 603 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; 604 adapter->eims_enable_mask = 0; 605 606 /* 607 * Populate the IVAR table and set the ITR values to the 608 * corresponding register. 609 */ 610 for (v_idx = 0; v_idx < q_vectors; v_idx++) { 611 struct ixgbevf_ring *ring; 612 q_vector = adapter->q_vector[v_idx]; 613 614 ixgbevf_for_each_ring(ring, q_vector->rx) 615 ixgbevf_set_ivar(adapter, 0, ring->reg_idx, v_idx); 616 617 ixgbevf_for_each_ring(ring, q_vector->tx) 618 ixgbevf_set_ivar(adapter, 1, ring->reg_idx, v_idx); 619 620 if (q_vector->tx.ring && !q_vector->rx.ring) { 621 /* tx only vector */ 622 if (adapter->tx_itr_setting == 1) 623 q_vector->itr = IXGBE_10K_ITR; 624 else 625 q_vector->itr = adapter->tx_itr_setting; 626 } else { 627 /* rx or rx/tx vector */ 628 if (adapter->rx_itr_setting == 1) 629 q_vector->itr = IXGBE_20K_ITR; 630 else 631 q_vector->itr = adapter->rx_itr_setting; 632 } 633 634 /* add q_vector eims value to global eims_enable_mask */ 635 adapter->eims_enable_mask |= 1 << v_idx; 636 637 ixgbevf_write_eitr(q_vector); 638 } 639 640 ixgbevf_set_ivar(adapter, -1, 1, v_idx); 641 /* setup eims_other and add value to global eims_enable_mask */ 642 adapter->eims_other = 1 << v_idx; 643 adapter->eims_enable_mask |= adapter->eims_other; 644} 645 646enum latency_range { 647 lowest_latency = 0, 648 low_latency = 1, 649 bulk_latency = 2, 650 latency_invalid = 255 651}; 652 653/** 654 * ixgbevf_update_itr - update the dynamic ITR value based on statistics 655 * @q_vector: structure containing interrupt and ring information 656 * @ring_container: structure containing ring performance data 657 * 658 * Stores a new ITR value based on packets and byte 659 * counts during the last interrupt. The advantage of per interrupt 660 * computation is faster updates and more accurate ITR for the current 661 * traffic pattern. Constants in this function were computed 662 * based on theoretical maximum wire speed and thresholds were set based 663 * on testing data as well as attempting to minimize response time 664 * while increasing bulk throughput. 665 **/ 666static void ixgbevf_update_itr(struct ixgbevf_q_vector *q_vector, 667 struct ixgbevf_ring_container *ring_container) 668{ 669 int bytes = ring_container->total_bytes; 670 int packets = ring_container->total_packets; 671 u32 timepassed_us; 672 u64 bytes_perint; 673 u8 itr_setting = ring_container->itr; 674 675 if (packets == 0) 676 return; 677 678 /* simple throttlerate management 679 * 0-20MB/s lowest (100000 ints/s) 680 * 20-100MB/s low (20000 ints/s) 681 * 100-1249MB/s bulk (8000 ints/s) 682 */ 683 /* what was last interrupt timeslice? */ 684 timepassed_us = q_vector->itr >> 2; 685 bytes_perint = bytes / timepassed_us; /* bytes/usec */ 686 687 switch (itr_setting) { 688 case lowest_latency: 689 if (bytes_perint > 10) 690 itr_setting = low_latency; 691 break; 692 case low_latency: 693 if (bytes_perint > 20) 694 itr_setting = bulk_latency; 695 else if (bytes_perint <= 10) 696 itr_setting = lowest_latency; 697 break; 698 case bulk_latency: 699 if (bytes_perint <= 20) 700 itr_setting = low_latency; 701 break; 702 } 703 704 /* clear work counters since we have the values we need */ 705 ring_container->total_bytes = 0; 706 ring_container->total_packets = 0; 707 708 /* write updated itr to ring container */ 709 ring_container->itr = itr_setting; 710} 711 712static void ixgbevf_set_itr(struct ixgbevf_q_vector *q_vector) 713{ 714 u32 new_itr = q_vector->itr; 715 u8 current_itr; 716 717 ixgbevf_update_itr(q_vector, &q_vector->tx); 718 ixgbevf_update_itr(q_vector, &q_vector->rx); 719 720 current_itr = max(q_vector->rx.itr, q_vector->tx.itr); 721 722 switch (current_itr) { 723 /* counts and packets in update_itr are dependent on these numbers */ 724 case lowest_latency: 725 new_itr = IXGBE_100K_ITR; 726 break; 727 case low_latency: 728 new_itr = IXGBE_20K_ITR; 729 break; 730 case bulk_latency: 731 default: 732 new_itr = IXGBE_8K_ITR; 733 break; 734 } 735 736 if (new_itr != q_vector->itr) { 737 /* do an exponential smoothing */ 738 new_itr = (10 * new_itr * q_vector->itr) / 739 ((9 * new_itr) + q_vector->itr); 740 741 /* save the algorithm value here */ 742 q_vector->itr = new_itr; 743 744 ixgbevf_write_eitr(q_vector); 745 } 746} 747 748static irqreturn_t ixgbevf_msix_other(int irq, void *data) 749{ 750 struct ixgbevf_adapter *adapter = data; 751 struct ixgbe_hw *hw = &adapter->hw; 752 753 hw->mac.get_link_status = 1; 754 755 if (!test_bit(__IXGBEVF_DOWN, &adapter->state)) 756 mod_timer(&adapter->watchdog_timer, jiffies); 757 758 IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, adapter->eims_other); 759 760 return IRQ_HANDLED; 761} 762 763 764/** 765 * ixgbevf_msix_clean_rings - single unshared vector rx clean (all queues) 766 * @irq: unused 767 * @data: pointer to our q_vector struct for this interrupt vector 768 **/ 769static irqreturn_t ixgbevf_msix_clean_rings(int irq, void *data) 770{ 771 struct ixgbevf_q_vector *q_vector = data; 772 773 /* EIAM disabled interrupts (on this vector) for us */ 774 if (q_vector->rx.ring || q_vector->tx.ring) 775 napi_schedule(&q_vector->napi); 776 777 return IRQ_HANDLED; 778} 779 780static inline void map_vector_to_rxq(struct ixgbevf_adapter *a, int v_idx, 781 int r_idx) 782{ 783 struct ixgbevf_q_vector *q_vector = a->q_vector[v_idx]; 784 785 a->rx_ring[r_idx].next = q_vector->rx.ring; 786 q_vector->rx.ring = &a->rx_ring[r_idx]; 787 q_vector->rx.count++; 788} 789 790static inline void map_vector_to_txq(struct ixgbevf_adapter *a, int v_idx, 791 int t_idx) 792{ 793 struct ixgbevf_q_vector *q_vector = a->q_vector[v_idx]; 794 795 a->tx_ring[t_idx].next = q_vector->tx.ring; 796 q_vector->tx.ring = &a->tx_ring[t_idx]; 797 q_vector->tx.count++; 798} 799 800/** 801 * ixgbevf_map_rings_to_vectors - Maps descriptor rings to vectors 802 * @adapter: board private structure to initialize 803 * 804 * This function maps descriptor rings to the queue-specific vectors 805 * we were allotted through the MSI-X enabling code. Ideally, we'd have 806 * one vector per ring/queue, but on a constrained vector budget, we 807 * group the rings as "efficiently" as possible. You would add new 808 * mapping configurations in here. 809 **/ 810static int ixgbevf_map_rings_to_vectors(struct ixgbevf_adapter *adapter) 811{ 812 int q_vectors; 813 int v_start = 0; 814 int rxr_idx = 0, txr_idx = 0; 815 int rxr_remaining = adapter->num_rx_queues; 816 int txr_remaining = adapter->num_tx_queues; 817 int i, j; 818 int rqpv, tqpv; 819 int err = 0; 820 821 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; 822 823 /* 824 * The ideal configuration... 825 * We have enough vectors to map one per queue. 826 */ 827 if (q_vectors == adapter->num_rx_queues + adapter->num_tx_queues) { 828 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++) 829 map_vector_to_rxq(adapter, v_start, rxr_idx); 830 831 for (; txr_idx < txr_remaining; v_start++, txr_idx++) 832 map_vector_to_txq(adapter, v_start, txr_idx); 833 goto out; 834 } 835 836 /* 837 * If we don't have enough vectors for a 1-to-1 838 * mapping, we'll have to group them so there are 839 * multiple queues per vector. 840 */ 841 /* Re-adjusting *qpv takes care of the remainder. */ 842 for (i = v_start; i < q_vectors; i++) { 843 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i); 844 for (j = 0; j < rqpv; j++) { 845 map_vector_to_rxq(adapter, i, rxr_idx); 846 rxr_idx++; 847 rxr_remaining--; 848 } 849 } 850 for (i = v_start; i < q_vectors; i++) { 851 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i); 852 for (j = 0; j < tqpv; j++) { 853 map_vector_to_txq(adapter, i, txr_idx); 854 txr_idx++; 855 txr_remaining--; 856 } 857 } 858 859out: 860 return err; 861} 862 863/** 864 * ixgbevf_request_msix_irqs - Initialize MSI-X interrupts 865 * @adapter: board private structure 866 * 867 * ixgbevf_request_msix_irqs allocates MSI-X vectors and requests 868 * interrupts from the kernel. 869 **/ 870static int ixgbevf_request_msix_irqs(struct ixgbevf_adapter *adapter) 871{ 872 struct net_device *netdev = adapter->netdev; 873 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; 874 int vector, err; 875 int ri = 0, ti = 0; 876 877 for (vector = 0; vector < q_vectors; vector++) { 878 struct ixgbevf_q_vector *q_vector = adapter->q_vector[vector]; 879 struct msix_entry *entry = &adapter->msix_entries[vector]; 880 881 if (q_vector->tx.ring && q_vector->rx.ring) { 882 snprintf(q_vector->name, sizeof(q_vector->name) - 1, 883 "%s-%s-%d", netdev->name, "TxRx", ri++); 884 ti++; 885 } else if (q_vector->rx.ring) { 886 snprintf(q_vector->name, sizeof(q_vector->name) - 1, 887 "%s-%s-%d", netdev->name, "rx", ri++); 888 } else if (q_vector->tx.ring) { 889 snprintf(q_vector->name, sizeof(q_vector->name) - 1, 890 "%s-%s-%d", netdev->name, "tx", ti++); 891 } else { 892 /* skip this unused q_vector */ 893 continue; 894 } 895 err = request_irq(entry->vector, &ixgbevf_msix_clean_rings, 0, 896 q_vector->name, q_vector); 897 if (err) { 898 hw_dbg(&adapter->hw, 899 "request_irq failed for MSIX interrupt " 900 "Error: %d\n", err); 901 goto free_queue_irqs; 902 } 903 } 904 905 err = request_irq(adapter->msix_entries[vector].vector, 906 &ixgbevf_msix_other, 0, netdev->name, adapter); 907 if (err) { 908 hw_dbg(&adapter->hw, 909 "request_irq for msix_other failed: %d\n", err); 910 goto free_queue_irqs; 911 } 912 913 return 0; 914 915free_queue_irqs: 916 while (vector) { 917 vector--; 918 free_irq(adapter->msix_entries[vector].vector, 919 adapter->q_vector[vector]); 920 } 921 pci_disable_msix(adapter->pdev); 922 kfree(adapter->msix_entries); 923 adapter->msix_entries = NULL; 924 return err; 925} 926 927static inline void ixgbevf_reset_q_vectors(struct ixgbevf_adapter *adapter) 928{ 929 int i, q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; 930 931 for (i = 0; i < q_vectors; i++) { 932 struct ixgbevf_q_vector *q_vector = adapter->q_vector[i]; 933 q_vector->rx.ring = NULL; 934 q_vector->tx.ring = NULL; 935 q_vector->rx.count = 0; 936 q_vector->tx.count = 0; 937 } 938} 939 940/** 941 * ixgbevf_request_irq - initialize interrupts 942 * @adapter: board private structure 943 * 944 * Attempts to configure interrupts using the best available 945 * capabilities of the hardware and kernel. 946 **/ 947static int ixgbevf_request_irq(struct ixgbevf_adapter *adapter) 948{ 949 int err = 0; 950 951 err = ixgbevf_request_msix_irqs(adapter); 952 953 if (err) 954 hw_dbg(&adapter->hw, 955 "request_irq failed, Error %d\n", err); 956 957 return err; 958} 959 960static void ixgbevf_free_irq(struct ixgbevf_adapter *adapter) 961{ 962 int i, q_vectors; 963 964 q_vectors = adapter->num_msix_vectors; 965 i = q_vectors - 1; 966 967 free_irq(adapter->msix_entries[i].vector, adapter); 968 i--; 969 970 for (; i >= 0; i--) { 971 /* free only the irqs that were actually requested */ 972 if (!adapter->q_vector[i]->rx.ring && 973 !adapter->q_vector[i]->tx.ring) 974 continue; 975 976 free_irq(adapter->msix_entries[i].vector, 977 adapter->q_vector[i]); 978 } 979 980 ixgbevf_reset_q_vectors(adapter); 981} 982 983/** 984 * ixgbevf_irq_disable - Mask off interrupt generation on the NIC 985 * @adapter: board private structure 986 **/ 987static inline void ixgbevf_irq_disable(struct ixgbevf_adapter *adapter) 988{ 989 struct ixgbe_hw *hw = &adapter->hw; 990 int i; 991 992 IXGBE_WRITE_REG(hw, IXGBE_VTEIAM, 0); 993 IXGBE_WRITE_REG(hw, IXGBE_VTEIMC, ~0); 994 IXGBE_WRITE_REG(hw, IXGBE_VTEIAC, 0); 995 996 IXGBE_WRITE_FLUSH(hw); 997 998 for (i = 0; i < adapter->num_msix_vectors; i++) 999 synchronize_irq(adapter->msix_entries[i].vector); 1000} 1001 1002/** 1003 * ixgbevf_irq_enable - Enable default interrupt generation settings 1004 * @adapter: board private structure 1005 **/ 1006static inline void ixgbevf_irq_enable(struct ixgbevf_adapter *adapter) 1007{ 1008 struct ixgbe_hw *hw = &adapter->hw; 1009 1010 IXGBE_WRITE_REG(hw, IXGBE_VTEIAM, adapter->eims_enable_mask); 1011 IXGBE_WRITE_REG(hw, IXGBE_VTEIAC, adapter->eims_enable_mask); 1012 IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, adapter->eims_enable_mask); 1013} 1014 1015/** 1016 * ixgbevf_configure_tx - Configure 82599 VF Transmit Unit after Reset 1017 * @adapter: board private structure 1018 * 1019 * Configure the Tx unit of the MAC after a reset. 1020 **/ 1021static void ixgbevf_configure_tx(struct ixgbevf_adapter *adapter) 1022{ 1023 u64 tdba; 1024 struct ixgbe_hw *hw = &adapter->hw; 1025 u32 i, j, tdlen, txctrl; 1026 1027 /* Setup the HW Tx Head and Tail descriptor pointers */ 1028 for (i = 0; i < adapter->num_tx_queues; i++) { 1029 struct ixgbevf_ring *ring = &adapter->tx_ring[i]; 1030 j = ring->reg_idx; 1031 tdba = ring->dma; 1032 tdlen = ring->count * sizeof(union ixgbe_adv_tx_desc); 1033 IXGBE_WRITE_REG(hw, IXGBE_VFTDBAL(j), 1034 (tdba & DMA_BIT_MASK(32))); 1035 IXGBE_WRITE_REG(hw, IXGBE_VFTDBAH(j), (tdba >> 32)); 1036 IXGBE_WRITE_REG(hw, IXGBE_VFTDLEN(j), tdlen); 1037 IXGBE_WRITE_REG(hw, IXGBE_VFTDH(j), 0); 1038 IXGBE_WRITE_REG(hw, IXGBE_VFTDT(j), 0); 1039 adapter->tx_ring[i].head = IXGBE_VFTDH(j); 1040 adapter->tx_ring[i].tail = IXGBE_VFTDT(j); 1041 /* Disable Tx Head Writeback RO bit, since this hoses 1042 * bookkeeping if things aren't delivered in order. 1043 */ 1044 txctrl = IXGBE_READ_REG(hw, IXGBE_VFDCA_TXCTRL(j)); 1045 txctrl &= ~IXGBE_DCA_TXCTRL_TX_WB_RO_EN; 1046 IXGBE_WRITE_REG(hw, IXGBE_VFDCA_TXCTRL(j), txctrl); 1047 } 1048} 1049 1050#define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2 1051 1052static void ixgbevf_configure_srrctl(struct ixgbevf_adapter *adapter, int index) 1053{ 1054 struct ixgbevf_ring *rx_ring; 1055 struct ixgbe_hw *hw = &adapter->hw; 1056 u32 srrctl; 1057 1058 rx_ring = &adapter->rx_ring[index]; 1059 1060 srrctl = IXGBE_SRRCTL_DROP_EN; 1061 1062 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF; 1063 1064 srrctl |= ALIGN(rx_ring->rx_buf_len, 1024) >> 1065 IXGBE_SRRCTL_BSIZEPKT_SHIFT; 1066 1067 IXGBE_WRITE_REG(hw, IXGBE_VFSRRCTL(index), srrctl); 1068} 1069 1070static void ixgbevf_set_rx_buffer_len(struct ixgbevf_adapter *adapter) 1071{ 1072 struct ixgbe_hw *hw = &adapter->hw; 1073 struct net_device *netdev = adapter->netdev; 1074 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN; 1075 int i; 1076 u16 rx_buf_len; 1077 1078 /* notify the PF of our intent to use this size of frame */ 1079 ixgbevf_rlpml_set_vf(hw, max_frame); 1080 1081 /* PF will allow an extra 4 bytes past for vlan tagged frames */ 1082 max_frame += VLAN_HLEN; 1083 1084 /* 1085 * Make best use of allocation by using all but 1K of a 1086 * power of 2 allocation that will be used for skb->head. 1087 */ 1088 if ((hw->mac.type == ixgbe_mac_X540_vf) && 1089 (max_frame <= MAXIMUM_ETHERNET_VLAN_SIZE)) 1090 rx_buf_len = MAXIMUM_ETHERNET_VLAN_SIZE; 1091 else if (max_frame <= IXGBEVF_RXBUFFER_3K) 1092 rx_buf_len = IXGBEVF_RXBUFFER_3K; 1093 else if (max_frame <= IXGBEVF_RXBUFFER_7K) 1094 rx_buf_len = IXGBEVF_RXBUFFER_7K; 1095 else if (max_frame <= IXGBEVF_RXBUFFER_15K) 1096 rx_buf_len = IXGBEVF_RXBUFFER_15K; 1097 else 1098 rx_buf_len = IXGBEVF_MAX_RXBUFFER; 1099 1100 for (i = 0; i < adapter->num_rx_queues; i++) 1101 adapter->rx_ring[i].rx_buf_len = rx_buf_len; 1102} 1103 1104/** 1105 * ixgbevf_configure_rx - Configure 82599 VF Receive Unit after Reset 1106 * @adapter: board private structure 1107 * 1108 * Configure the Rx unit of the MAC after a reset. 1109 **/ 1110static void ixgbevf_configure_rx(struct ixgbevf_adapter *adapter) 1111{ 1112 u64 rdba; 1113 struct ixgbe_hw *hw = &adapter->hw; 1114 int i, j; 1115 u32 rdlen; 1116 1117 /* PSRTYPE must be initialized in 82599 */ 1118 IXGBE_WRITE_REG(hw, IXGBE_VFPSRTYPE, 0); 1119 1120 /* set_rx_buffer_len must be called before ring initialization */ 1121 ixgbevf_set_rx_buffer_len(adapter); 1122 1123 rdlen = adapter->rx_ring[0].count * sizeof(union ixgbe_adv_rx_desc); 1124 /* Setup the HW Rx Head and Tail Descriptor Pointers and 1125 * the Base and Length of the Rx Descriptor Ring */ 1126 for (i = 0; i < adapter->num_rx_queues; i++) { 1127 rdba = adapter->rx_ring[i].dma; 1128 j = adapter->rx_ring[i].reg_idx; 1129 IXGBE_WRITE_REG(hw, IXGBE_VFRDBAL(j), 1130 (rdba & DMA_BIT_MASK(32))); 1131 IXGBE_WRITE_REG(hw, IXGBE_VFRDBAH(j), (rdba >> 32)); 1132 IXGBE_WRITE_REG(hw, IXGBE_VFRDLEN(j), rdlen); 1133 IXGBE_WRITE_REG(hw, IXGBE_VFRDH(j), 0); 1134 IXGBE_WRITE_REG(hw, IXGBE_VFRDT(j), 0); 1135 adapter->rx_ring[i].head = IXGBE_VFRDH(j); 1136 adapter->rx_ring[i].tail = IXGBE_VFRDT(j); 1137 1138 ixgbevf_configure_srrctl(adapter, j); 1139 } 1140} 1141 1142static int ixgbevf_vlan_rx_add_vid(struct net_device *netdev, u16 vid) 1143{ 1144 struct ixgbevf_adapter *adapter = netdev_priv(netdev); 1145 struct ixgbe_hw *hw = &adapter->hw; 1146 int err; 1147 1148 if (!hw->mac.ops.set_vfta) 1149 return -EOPNOTSUPP; 1150 1151 spin_lock_bh(&adapter->mbx_lock); 1152 1153 /* add VID to filter table */ 1154 err = hw->mac.ops.set_vfta(hw, vid, 0, true); 1155 1156 spin_unlock_bh(&adapter->mbx_lock); 1157 1158 /* translate error return types so error makes sense */ 1159 if (err == IXGBE_ERR_MBX) 1160 return -EIO; 1161 1162 if (err == IXGBE_ERR_INVALID_ARGUMENT) 1163 return -EACCES; 1164 1165 set_bit(vid, adapter->active_vlans); 1166 1167 return err; 1168} 1169 1170static int ixgbevf_vlan_rx_kill_vid(struct net_device *netdev, u16 vid) 1171{ 1172 struct ixgbevf_adapter *adapter = netdev_priv(netdev); 1173 struct ixgbe_hw *hw = &adapter->hw; 1174 int err = -EOPNOTSUPP; 1175 1176 spin_lock_bh(&adapter->mbx_lock); 1177 1178 /* remove VID from filter table */ 1179 if (hw->mac.ops.set_vfta) 1180 err = hw->mac.ops.set_vfta(hw, vid, 0, false); 1181 1182 spin_unlock_bh(&adapter->mbx_lock); 1183 1184 clear_bit(vid, adapter->active_vlans); 1185 1186 return err; 1187} 1188 1189static void ixgbevf_restore_vlan(struct ixgbevf_adapter *adapter) 1190{ 1191 u16 vid; 1192 1193 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID) 1194 ixgbevf_vlan_rx_add_vid(adapter->netdev, vid); 1195} 1196 1197static int ixgbevf_write_uc_addr_list(struct net_device *netdev) 1198{ 1199 struct ixgbevf_adapter *adapter = netdev_priv(netdev); 1200 struct ixgbe_hw *hw = &adapter->hw; 1201 int count = 0; 1202 1203 if ((netdev_uc_count(netdev)) > 10) { 1204 pr_err("Too many unicast filters - No Space\n"); 1205 return -ENOSPC; 1206 } 1207 1208 if (!netdev_uc_empty(netdev)) { 1209 struct netdev_hw_addr *ha; 1210 netdev_for_each_uc_addr(ha, netdev) { 1211 hw->mac.ops.set_uc_addr(hw, ++count, ha->addr); 1212 udelay(200); 1213 } 1214 } else { 1215 /* 1216 * If the list is empty then send message to PF driver to 1217 * clear all macvlans on this VF. 1218 */ 1219 hw->mac.ops.set_uc_addr(hw, 0, NULL); 1220 } 1221 1222 return count; 1223} 1224 1225/** 1226 * ixgbevf_set_rx_mode - Multicast set 1227 * @netdev: network interface device structure 1228 * 1229 * The set_rx_method entry point is called whenever the multicast address 1230 * list or the network interface flags are updated. This routine is 1231 * responsible for configuring the hardware for proper multicast mode. 1232 **/ 1233static void ixgbevf_set_rx_mode(struct net_device *netdev) 1234{ 1235 struct ixgbevf_adapter *adapter = netdev_priv(netdev); 1236 struct ixgbe_hw *hw = &adapter->hw; 1237 1238 spin_lock_bh(&adapter->mbx_lock); 1239 1240 /* reprogram multicast list */ 1241 if (hw->mac.ops.update_mc_addr_list) 1242 hw->mac.ops.update_mc_addr_list(hw, netdev); 1243 1244 ixgbevf_write_uc_addr_list(netdev); 1245 1246 spin_unlock_bh(&adapter->mbx_lock); 1247} 1248 1249static void ixgbevf_napi_enable_all(struct ixgbevf_adapter *adapter) 1250{ 1251 int q_idx; 1252 struct ixgbevf_q_vector *q_vector; 1253 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; 1254 1255 for (q_idx = 0; q_idx < q_vectors; q_idx++) { 1256 q_vector = adapter->q_vector[q_idx]; 1257 napi_enable(&q_vector->napi); 1258 } 1259} 1260 1261static void ixgbevf_napi_disable_all(struct ixgbevf_adapter *adapter) 1262{ 1263 int q_idx; 1264 struct ixgbevf_q_vector *q_vector; 1265 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; 1266 1267 for (q_idx = 0; q_idx < q_vectors; q_idx++) { 1268 q_vector = adapter->q_vector[q_idx]; 1269 napi_disable(&q_vector->napi); 1270 } 1271} 1272 1273static void ixgbevf_configure(struct ixgbevf_adapter *adapter) 1274{ 1275 struct net_device *netdev = adapter->netdev; 1276 int i; 1277 1278 ixgbevf_set_rx_mode(netdev); 1279 1280 ixgbevf_restore_vlan(adapter); 1281 1282 ixgbevf_configure_tx(adapter); 1283 ixgbevf_configure_rx(adapter); 1284 for (i = 0; i < adapter->num_rx_queues; i++) { 1285 struct ixgbevf_ring *ring = &adapter->rx_ring[i]; 1286 ixgbevf_alloc_rx_buffers(adapter, ring, 1287 IXGBE_DESC_UNUSED(ring)); 1288 } 1289} 1290 1291#define IXGBE_MAX_RX_DESC_POLL 10 1292static inline void ixgbevf_rx_desc_queue_enable(struct ixgbevf_adapter *adapter, 1293 int rxr) 1294{ 1295 struct ixgbe_hw *hw = &adapter->hw; 1296 int j = adapter->rx_ring[rxr].reg_idx; 1297 int k; 1298 1299 for (k = 0; k < IXGBE_MAX_RX_DESC_POLL; k++) { 1300 if (IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(j)) & IXGBE_RXDCTL_ENABLE) 1301 break; 1302 else 1303 msleep(1); 1304 } 1305 if (k >= IXGBE_MAX_RX_DESC_POLL) { 1306 hw_dbg(hw, "RXDCTL.ENABLE on Rx queue %d " 1307 "not set within the polling period\n", rxr); 1308 } 1309 1310 ixgbevf_release_rx_desc(&adapter->hw, &adapter->rx_ring[rxr], 1311 (adapter->rx_ring[rxr].count - 1)); 1312} 1313 1314static void ixgbevf_save_reset_stats(struct ixgbevf_adapter *adapter) 1315{ 1316 /* Only save pre-reset stats if there are some */ 1317 if (adapter->stats.vfgprc || adapter->stats.vfgptc) { 1318 adapter->stats.saved_reset_vfgprc += adapter->stats.vfgprc - 1319 adapter->stats.base_vfgprc; 1320 adapter->stats.saved_reset_vfgptc += adapter->stats.vfgptc - 1321 adapter->stats.base_vfgptc; 1322 adapter->stats.saved_reset_vfgorc += adapter->stats.vfgorc - 1323 adapter->stats.base_vfgorc; 1324 adapter->stats.saved_reset_vfgotc += adapter->stats.vfgotc - 1325 adapter->stats.base_vfgotc; 1326 adapter->stats.saved_reset_vfmprc += adapter->stats.vfmprc - 1327 adapter->stats.base_vfmprc; 1328 } 1329} 1330 1331static void ixgbevf_init_last_counter_stats(struct ixgbevf_adapter *adapter) 1332{ 1333 struct ixgbe_hw *hw = &adapter->hw; 1334 1335 adapter->stats.last_vfgprc = IXGBE_READ_REG(hw, IXGBE_VFGPRC); 1336 adapter->stats.last_vfgorc = IXGBE_READ_REG(hw, IXGBE_VFGORC_LSB); 1337 adapter->stats.last_vfgorc |= 1338 (((u64)(IXGBE_READ_REG(hw, IXGBE_VFGORC_MSB))) << 32); 1339 adapter->stats.last_vfgptc = IXGBE_READ_REG(hw, IXGBE_VFGPTC); 1340 adapter->stats.last_vfgotc = IXGBE_READ_REG(hw, IXGBE_VFGOTC_LSB); 1341 adapter->stats.last_vfgotc |= 1342 (((u64)(IXGBE_READ_REG(hw, IXGBE_VFGOTC_MSB))) << 32); 1343 adapter->stats.last_vfmprc = IXGBE_READ_REG(hw, IXGBE_VFMPRC); 1344 1345 adapter->stats.base_vfgprc = adapter->stats.last_vfgprc; 1346 adapter->stats.base_vfgorc = adapter->stats.last_vfgorc; 1347 adapter->stats.base_vfgptc = adapter->stats.last_vfgptc; 1348 adapter->stats.base_vfgotc = adapter->stats.last_vfgotc; 1349 adapter->stats.base_vfmprc = adapter->stats.last_vfmprc; 1350} 1351 1352static void ixgbevf_negotiate_api(struct ixgbevf_adapter *adapter) 1353{ 1354 struct ixgbe_hw *hw = &adapter->hw; 1355 int api[] = { ixgbe_mbox_api_11, 1356 ixgbe_mbox_api_10, 1357 ixgbe_mbox_api_unknown }; 1358 int err = 0, idx = 0; 1359 1360 spin_lock_bh(&adapter->mbx_lock); 1361 1362 while (api[idx] != ixgbe_mbox_api_unknown) { 1363 err = ixgbevf_negotiate_api_version(hw, api[idx]); 1364 if (!err) 1365 break; 1366 idx++; 1367 } 1368 1369 spin_unlock_bh(&adapter->mbx_lock); 1370} 1371 1372static void ixgbevf_up_complete(struct ixgbevf_adapter *adapter) 1373{ 1374 struct net_device *netdev = adapter->netdev; 1375 struct ixgbe_hw *hw = &adapter->hw; 1376 int i, j = 0; 1377 int num_rx_rings = adapter->num_rx_queues; 1378 u32 txdctl, rxdctl; 1379 1380 for (i = 0; i < adapter->num_tx_queues; i++) { 1381 j = adapter->tx_ring[i].reg_idx; 1382 txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(j)); 1383 /* enable WTHRESH=8 descriptors, to encourage burst writeback */ 1384 txdctl |= (8 << 16); 1385 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(j), txdctl); 1386 } 1387 1388 for (i = 0; i < adapter->num_tx_queues; i++) { 1389 j = adapter->tx_ring[i].reg_idx; 1390 txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(j)); 1391 txdctl |= IXGBE_TXDCTL_ENABLE; 1392 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(j), txdctl); 1393 } 1394 1395 for (i = 0; i < num_rx_rings; i++) { 1396 j = adapter->rx_ring[i].reg_idx; 1397 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(j)); 1398 rxdctl |= IXGBE_RXDCTL_ENABLE | IXGBE_RXDCTL_VME; 1399 if (hw->mac.type == ixgbe_mac_X540_vf) { 1400 rxdctl &= ~IXGBE_RXDCTL_RLPMLMASK; 1401 rxdctl |= ((netdev->mtu + ETH_HLEN + ETH_FCS_LEN) | 1402 IXGBE_RXDCTL_RLPML_EN); 1403 } 1404 IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(j), rxdctl); 1405 ixgbevf_rx_desc_queue_enable(adapter, i); 1406 } 1407 1408 ixgbevf_configure_msix(adapter); 1409 1410 spin_lock_bh(&adapter->mbx_lock); 1411 1412 if (hw->mac.ops.set_rar) { 1413 if (is_valid_ether_addr(hw->mac.addr)) 1414 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0); 1415 else 1416 hw->mac.ops.set_rar(hw, 0, hw->mac.perm_addr, 0); 1417 } 1418 1419 spin_unlock_bh(&adapter->mbx_lock); 1420 1421 clear_bit(__IXGBEVF_DOWN, &adapter->state); 1422 ixgbevf_napi_enable_all(adapter); 1423 1424 /* enable transmits */ 1425 netif_tx_start_all_queues(netdev); 1426 1427 ixgbevf_save_reset_stats(adapter); 1428 ixgbevf_init_last_counter_stats(adapter); 1429 1430 hw->mac.get_link_status = 1; 1431 mod_timer(&adapter->watchdog_timer, jiffies); 1432} 1433 1434static int ixgbevf_reset_queues(struct ixgbevf_adapter *adapter) 1435{ 1436 struct ixgbe_hw *hw = &adapter->hw; 1437 struct ixgbevf_ring *rx_ring; 1438 unsigned int def_q = 0; 1439 unsigned int num_tcs = 0; 1440 unsigned int num_rx_queues = 1; 1441 int err, i; 1442 1443 spin_lock_bh(&adapter->mbx_lock); 1444 1445 /* fetch queue configuration from the PF */ 1446 err = ixgbevf_get_queues(hw, &num_tcs, &def_q); 1447 1448 spin_unlock_bh(&adapter->mbx_lock); 1449 1450 if (err) 1451 return err; 1452 1453 if (num_tcs > 1) { 1454 /* update default Tx ring register index */ 1455 adapter->tx_ring[0].reg_idx = def_q; 1456 1457 /* we need as many queues as traffic classes */ 1458 num_rx_queues = num_tcs; 1459 } 1460 1461 /* nothing to do if we have the correct number of queues */ 1462 if (adapter->num_rx_queues == num_rx_queues) 1463 return 0; 1464 1465 /* allocate new rings */ 1466 rx_ring = kcalloc(num_rx_queues, 1467 sizeof(struct ixgbevf_ring), GFP_KERNEL); 1468 if (!rx_ring) 1469 return -ENOMEM; 1470 1471 /* setup ring fields */ 1472 for (i = 0; i < num_rx_queues; i++) { 1473 rx_ring[i].count = adapter->rx_ring_count; 1474 rx_ring[i].queue_index = i; 1475 rx_ring[i].reg_idx = i; 1476 rx_ring[i].dev = &adapter->pdev->dev; 1477 rx_ring[i].netdev = adapter->netdev; 1478 1479 /* allocate resources on the ring */ 1480 err = ixgbevf_setup_rx_resources(adapter, &rx_ring[i]); 1481 if (err) { 1482 while (i) { 1483 i--; 1484 ixgbevf_free_rx_resources(adapter, &rx_ring[i]); 1485 } 1486 kfree(rx_ring); 1487 return err; 1488 } 1489 } 1490 1491 /* free the existing rings and queues */ 1492 ixgbevf_free_all_rx_resources(adapter); 1493 adapter->num_rx_queues = 0; 1494 kfree(adapter->rx_ring); 1495 1496 /* move new rings into position on the adapter struct */ 1497 adapter->rx_ring = rx_ring; 1498 adapter->num_rx_queues = num_rx_queues; 1499 1500 /* reset ring to vector mapping */ 1501 ixgbevf_reset_q_vectors(adapter); 1502 ixgbevf_map_rings_to_vectors(adapter); 1503 1504 return 0; 1505} 1506 1507void ixgbevf_up(struct ixgbevf_adapter *adapter) 1508{ 1509 struct ixgbe_hw *hw = &adapter->hw; 1510 1511 ixgbevf_negotiate_api(adapter); 1512 1513 ixgbevf_reset_queues(adapter); 1514 1515 ixgbevf_configure(adapter); 1516 1517 ixgbevf_up_complete(adapter); 1518 1519 /* clear any pending interrupts, may auto mask */ 1520 IXGBE_READ_REG(hw, IXGBE_VTEICR); 1521 1522 ixgbevf_irq_enable(adapter); 1523} 1524 1525/** 1526 * ixgbevf_clean_rx_ring - Free Rx Buffers per Queue 1527 * @adapter: board private structure 1528 * @rx_ring: ring to free buffers from 1529 **/ 1530static void ixgbevf_clean_rx_ring(struct ixgbevf_adapter *adapter, 1531 struct ixgbevf_ring *rx_ring) 1532{ 1533 struct pci_dev *pdev = adapter->pdev; 1534 unsigned long size; 1535 unsigned int i; 1536 1537 if (!rx_ring->rx_buffer_info) 1538 return; 1539 1540 /* Free all the Rx ring sk_buffs */ 1541 for (i = 0; i < rx_ring->count; i++) { 1542 struct ixgbevf_rx_buffer *rx_buffer_info; 1543 1544 rx_buffer_info = &rx_ring->rx_buffer_info[i]; 1545 if (rx_buffer_info->dma) { 1546 dma_unmap_single(&pdev->dev, rx_buffer_info->dma, 1547 rx_ring->rx_buf_len, 1548 DMA_FROM_DEVICE); 1549 rx_buffer_info->dma = 0; 1550 } 1551 if (rx_buffer_info->skb) { 1552 struct sk_buff *skb = rx_buffer_info->skb; 1553 rx_buffer_info->skb = NULL; 1554 do { 1555 struct sk_buff *this = skb; 1556 skb = IXGBE_CB(skb)->prev; 1557 dev_kfree_skb(this); 1558 } while (skb); 1559 } 1560 } 1561 1562 size = sizeof(struct ixgbevf_rx_buffer) * rx_ring->count; 1563 memset(rx_ring->rx_buffer_info, 0, size); 1564 1565 /* Zero out the descriptor ring */ 1566 memset(rx_ring->desc, 0, rx_ring->size); 1567 1568 rx_ring->next_to_clean = 0; 1569 rx_ring->next_to_use = 0; 1570 1571 if (rx_ring->head) 1572 writel(0, adapter->hw.hw_addr + rx_ring->head); 1573 if (rx_ring->tail) 1574 writel(0, adapter->hw.hw_addr + rx_ring->tail); 1575} 1576 1577/** 1578 * ixgbevf_clean_tx_ring - Free Tx Buffers 1579 * @adapter: board private structure 1580 * @tx_ring: ring to be cleaned 1581 **/ 1582static void ixgbevf_clean_tx_ring(struct ixgbevf_adapter *adapter, 1583 struct ixgbevf_ring *tx_ring) 1584{ 1585 struct ixgbevf_tx_buffer *tx_buffer_info; 1586 unsigned long size; 1587 unsigned int i; 1588 1589 if (!tx_ring->tx_buffer_info) 1590 return; 1591 1592 /* Free all the Tx ring sk_buffs */ 1593 1594 for (i = 0; i < tx_ring->count; i++) { 1595 tx_buffer_info = &tx_ring->tx_buffer_info[i]; 1596 ixgbevf_unmap_and_free_tx_resource(tx_ring, tx_buffer_info); 1597 } 1598 1599 size = sizeof(struct ixgbevf_tx_buffer) * tx_ring->count; 1600 memset(tx_ring->tx_buffer_info, 0, size); 1601 1602 memset(tx_ring->desc, 0, tx_ring->size); 1603 1604 tx_ring->next_to_use = 0; 1605 tx_ring->next_to_clean = 0; 1606 1607 if (tx_ring->head) 1608 writel(0, adapter->hw.hw_addr + tx_ring->head); 1609 if (tx_ring->tail) 1610 writel(0, adapter->hw.hw_addr + tx_ring->tail); 1611} 1612 1613/** 1614 * ixgbevf_clean_all_rx_rings - Free Rx Buffers for all queues 1615 * @adapter: board private structure 1616 **/ 1617static void ixgbevf_clean_all_rx_rings(struct ixgbevf_adapter *adapter) 1618{ 1619 int i; 1620 1621 for (i = 0; i < adapter->num_rx_queues; i++) 1622 ixgbevf_clean_rx_ring(adapter, &adapter->rx_ring[i]); 1623} 1624 1625/** 1626 * ixgbevf_clean_all_tx_rings - Free Tx Buffers for all queues 1627 * @adapter: board private structure 1628 **/ 1629static void ixgbevf_clean_all_tx_rings(struct ixgbevf_adapter *adapter) 1630{ 1631 int i; 1632 1633 for (i = 0; i < adapter->num_tx_queues; i++) 1634 ixgbevf_clean_tx_ring(adapter, &adapter->tx_ring[i]); 1635} 1636 1637void ixgbevf_down(struct ixgbevf_adapter *adapter) 1638{ 1639 struct net_device *netdev = adapter->netdev; 1640 struct ixgbe_hw *hw = &adapter->hw; 1641 u32 txdctl; 1642 int i, j; 1643 1644 /* signal that we are down to the interrupt handler */ 1645 set_bit(__IXGBEVF_DOWN, &adapter->state); 1646 /* disable receives */ 1647 1648 netif_tx_disable(netdev); 1649 1650 msleep(10); 1651 1652 netif_tx_stop_all_queues(netdev); 1653 1654 ixgbevf_irq_disable(adapter); 1655 1656 ixgbevf_napi_disable_all(adapter); 1657 1658 del_timer_sync(&adapter->watchdog_timer); 1659 /* can't call flush scheduled work here because it can deadlock 1660 * if linkwatch_event tries to acquire the rtnl_lock which we are 1661 * holding */ 1662 while (adapter->flags & IXGBE_FLAG_IN_WATCHDOG_TASK) 1663 msleep(1); 1664 1665 /* disable transmits in the hardware now that interrupts are off */ 1666 for (i = 0; i < adapter->num_tx_queues; i++) { 1667 j = adapter->tx_ring[i].reg_idx; 1668 txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(j)); 1669 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(j), 1670 (txdctl & ~IXGBE_TXDCTL_ENABLE)); 1671 } 1672 1673 netif_carrier_off(netdev); 1674 1675 if (!pci_channel_offline(adapter->pdev)) 1676 ixgbevf_reset(adapter); 1677 1678 ixgbevf_clean_all_tx_rings(adapter); 1679 ixgbevf_clean_all_rx_rings(adapter); 1680} 1681 1682void ixgbevf_reinit_locked(struct ixgbevf_adapter *adapter) 1683{ 1684 WARN_ON(in_interrupt()); 1685 1686 while (test_and_set_bit(__IXGBEVF_RESETTING, &adapter->state)) 1687 msleep(1); 1688 1689 /* 1690 * Check if PF is up before re-init. If not then skip until 1691 * later when the PF is up and ready to service requests from 1692 * the VF via mailbox. If the VF is up and running then the 1693 * watchdog task will continue to schedule reset tasks until 1694 * the PF is up and running. 1695 */ 1696 ixgbevf_down(adapter); 1697 ixgbevf_up(adapter); 1698 1699 clear_bit(__IXGBEVF_RESETTING, &adapter->state); 1700} 1701 1702void ixgbevf_reset(struct ixgbevf_adapter *adapter) 1703{ 1704 struct ixgbe_hw *hw = &adapter->hw; 1705 struct net_device *netdev = adapter->netdev; 1706 1707 spin_lock_bh(&adapter->mbx_lock); 1708 1709 if (hw->mac.ops.reset_hw(hw)) 1710 hw_dbg(hw, "PF still resetting\n"); 1711 else 1712 hw->mac.ops.init_hw(hw); 1713 1714 spin_unlock_bh(&adapter->mbx_lock); 1715 1716 if (is_valid_ether_addr(adapter->hw.mac.addr)) { 1717 memcpy(netdev->dev_addr, adapter->hw.mac.addr, 1718 netdev->addr_len); 1719 memcpy(netdev->perm_addr, adapter->hw.mac.addr, 1720 netdev->addr_len); 1721 } 1722} 1723 1724static void ixgbevf_acquire_msix_vectors(struct ixgbevf_adapter *adapter, 1725 int vectors) 1726{ 1727 int err, vector_threshold; 1728 1729 /* We'll want at least 2 (vector_threshold): 1730 * 1) TxQ[0] + RxQ[0] handler 1731 * 2) Other (Link Status Change, etc.) 1732 */ 1733 vector_threshold = MIN_MSIX_COUNT; 1734 1735 /* The more we get, the more we will assign to Tx/Rx Cleanup 1736 * for the separate queues...where Rx Cleanup >= Tx Cleanup. 1737 * Right now, we simply care about how many we'll get; we'll 1738 * set them up later while requesting irq's. 1739 */ 1740 while (vectors >= vector_threshold) { 1741 err = pci_enable_msix(adapter->pdev, adapter->msix_entries, 1742 vectors); 1743 if (!err) /* Success in acquiring all requested vectors. */ 1744 break; 1745 else if (err < 0) 1746 vectors = 0; /* Nasty failure, quit now */ 1747 else /* err == number of vectors we should try again with */ 1748 vectors = err; 1749 } 1750 1751 if (vectors < vector_threshold) { 1752 /* Can't allocate enough MSI-X interrupts? Oh well. 1753 * This just means we'll go with either a single MSI 1754 * vector or fall back to legacy interrupts. 1755 */ 1756 hw_dbg(&adapter->hw, 1757 "Unable to allocate MSI-X interrupts\n"); 1758 kfree(adapter->msix_entries); 1759 adapter->msix_entries = NULL; 1760 } else { 1761 /* 1762 * Adjust for only the vectors we'll use, which is minimum 1763 * of max_msix_q_vectors + NON_Q_VECTORS, or the number of 1764 * vectors we were allocated. 1765 */ 1766 adapter->num_msix_vectors = vectors; 1767 } 1768} 1769 1770/** 1771 * ixgbevf_set_num_queues - Allocate queues for device, feature dependent 1772 * @adapter: board private structure to initialize 1773 * 1774 * This is the top level queue allocation routine. The order here is very 1775 * important, starting with the "most" number of features turned on at once, 1776 * and ending with the smallest set of features. This way large combinations 1777 * can be allocated if they're turned on, and smaller combinations are the 1778 * fallthrough conditions. 1779 * 1780 **/ 1781static void ixgbevf_set_num_queues(struct ixgbevf_adapter *adapter) 1782{ 1783 /* Start with base case */ 1784 adapter->num_rx_queues = 1; 1785 adapter->num_tx_queues = 1; 1786} 1787 1788/** 1789 * ixgbevf_alloc_queues - Allocate memory for all rings 1790 * @adapter: board private structure to initialize 1791 * 1792 * We allocate one ring per queue at run-time since we don't know the 1793 * number of queues at compile-time. The polling_netdev array is 1794 * intended for Multiqueue, but should work fine with a single queue. 1795 **/ 1796static int ixgbevf_alloc_queues(struct ixgbevf_adapter *adapter) 1797{ 1798 int i; 1799 1800 adapter->tx_ring = kcalloc(adapter->num_tx_queues, 1801 sizeof(struct ixgbevf_ring), GFP_KERNEL); 1802 if (!adapter->tx_ring) 1803 goto err_tx_ring_allocation; 1804 1805 adapter->rx_ring = kcalloc(adapter->num_rx_queues, 1806 sizeof(struct ixgbevf_ring), GFP_KERNEL); 1807 if (!adapter->rx_ring) 1808 goto err_rx_ring_allocation; 1809 1810 for (i = 0; i < adapter->num_tx_queues; i++) { 1811 adapter->tx_ring[i].count = adapter->tx_ring_count; 1812 adapter->tx_ring[i].queue_index = i; 1813 /* reg_idx may be remapped later by DCB config */ 1814 adapter->tx_ring[i].reg_idx = i; 1815 adapter->tx_ring[i].dev = &adapter->pdev->dev; 1816 adapter->tx_ring[i].netdev = adapter->netdev; 1817 } 1818 1819 for (i = 0; i < adapter->num_rx_queues; i++) { 1820 adapter->rx_ring[i].count = adapter->rx_ring_count; 1821 adapter->rx_ring[i].queue_index = i; 1822 adapter->rx_ring[i].reg_idx = i; 1823 adapter->rx_ring[i].dev = &adapter->pdev->dev; 1824 adapter->rx_ring[i].netdev = adapter->netdev; 1825 } 1826 1827 return 0; 1828 1829err_rx_ring_allocation: 1830 kfree(adapter->tx_ring); 1831err_tx_ring_allocation: 1832 return -ENOMEM; 1833} 1834 1835/** 1836 * ixgbevf_set_interrupt_capability - set MSI-X or FAIL if not supported 1837 * @adapter: board private structure to initialize 1838 * 1839 * Attempt to configure the interrupts using the best available 1840 * capabilities of the hardware and the kernel. 1841 **/ 1842static int ixgbevf_set_interrupt_capability(struct ixgbevf_adapter *adapter) 1843{ 1844 struct net_device *netdev = adapter->netdev; 1845 int err = 0; 1846 int vector, v_budget; 1847 1848 /* 1849 * It's easy to be greedy for MSI-X vectors, but it really 1850 * doesn't do us much good if we have a lot more vectors 1851 * than CPU's. So let's be conservative and only ask for 1852 * (roughly) the same number of vectors as there are CPU's. 1853 * The default is to use pairs of vectors. 1854 */ 1855 v_budget = max(adapter->num_rx_queues, adapter->num_tx_queues); 1856 v_budget = min_t(int, v_budget, num_online_cpus()); 1857 v_budget += NON_Q_VECTORS; 1858 1859 /* A failure in MSI-X entry allocation isn't fatal, but it does 1860 * mean we disable MSI-X capabilities of the adapter. */ 1861 adapter->msix_entries = kcalloc(v_budget, 1862 sizeof(struct msix_entry), GFP_KERNEL); 1863 if (!adapter->msix_entries) { 1864 err = -ENOMEM; 1865 goto out; 1866 } 1867 1868 for (vector = 0; vector < v_budget; vector++) 1869 adapter->msix_entries[vector].entry = vector; 1870 1871 ixgbevf_acquire_msix_vectors(adapter, v_budget); 1872 1873 err = netif_set_real_num_tx_queues(netdev, adapter->num_tx_queues); 1874 if (err) 1875 goto out; 1876 1877 err = netif_set_real_num_rx_queues(netdev, adapter->num_rx_queues); 1878 1879out: 1880 return err; 1881} 1882 1883/** 1884 * ixgbevf_alloc_q_vectors - Allocate memory for interrupt vectors 1885 * @adapter: board private structure to initialize 1886 * 1887 * We allocate one q_vector per queue interrupt. If allocation fails we 1888 * return -ENOMEM. 1889 **/ 1890static int ixgbevf_alloc_q_vectors(struct ixgbevf_adapter *adapter) 1891{ 1892 int q_idx, num_q_vectors; 1893 struct ixgbevf_q_vector *q_vector; 1894 1895 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; 1896 1897 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) { 1898 q_vector = kzalloc(sizeof(struct ixgbevf_q_vector), GFP_KERNEL); 1899 if (!q_vector) 1900 goto err_out; 1901 q_vector->adapter = adapter; 1902 q_vector->v_idx = q_idx; 1903 netif_napi_add(adapter->netdev, &q_vector->napi, 1904 ixgbevf_poll, 64); 1905 adapter->q_vector[q_idx] = q_vector; 1906 } 1907 1908 return 0; 1909 1910err_out: 1911 while (q_idx) { 1912 q_idx--; 1913 q_vector = adapter->q_vector[q_idx]; 1914 netif_napi_del(&q_vector->napi); 1915 kfree(q_vector); 1916 adapter->q_vector[q_idx] = NULL; 1917 } 1918 return -ENOMEM; 1919} 1920 1921/** 1922 * ixgbevf_free_q_vectors - Free memory allocated for interrupt vectors 1923 * @adapter: board private structure to initialize 1924 * 1925 * This function frees the memory allocated to the q_vectors. In addition if 1926 * NAPI is enabled it will delete any references to the NAPI struct prior 1927 * to freeing the q_vector. 1928 **/ 1929static void ixgbevf_free_q_vectors(struct ixgbevf_adapter *adapter) 1930{ 1931 int q_idx, num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; 1932 1933 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) { 1934 struct ixgbevf_q_vector *q_vector = adapter->q_vector[q_idx]; 1935 1936 adapter->q_vector[q_idx] = NULL; 1937 netif_napi_del(&q_vector->napi); 1938 kfree(q_vector); 1939 } 1940} 1941 1942/** 1943 * ixgbevf_reset_interrupt_capability - Reset MSIX setup 1944 * @adapter: board private structure 1945 * 1946 **/ 1947static void ixgbevf_reset_interrupt_capability(struct ixgbevf_adapter *adapter) 1948{ 1949 pci_disable_msix(adapter->pdev); 1950 kfree(adapter->msix_entries); 1951 adapter->msix_entries = NULL; 1952} 1953 1954/** 1955 * ixgbevf_init_interrupt_scheme - Determine if MSIX is supported and init 1956 * @adapter: board private structure to initialize 1957 * 1958 **/ 1959static int ixgbevf_init_interrupt_scheme(struct ixgbevf_adapter *adapter) 1960{ 1961 int err; 1962 1963 /* Number of supported queues */ 1964 ixgbevf_set_num_queues(adapter); 1965 1966 err = ixgbevf_set_interrupt_capability(adapter); 1967 if (err) { 1968 hw_dbg(&adapter->hw, 1969 "Unable to setup interrupt capabilities\n"); 1970 goto err_set_interrupt; 1971 } 1972 1973 err = ixgbevf_alloc_q_vectors(adapter); 1974 if (err) { 1975 hw_dbg(&adapter->hw, "Unable to allocate memory for queue " 1976 "vectors\n"); 1977 goto err_alloc_q_vectors; 1978 } 1979 1980 err = ixgbevf_alloc_queues(adapter); 1981 if (err) { 1982 pr_err("Unable to allocate memory for queues\n"); 1983 goto err_alloc_queues; 1984 } 1985 1986 hw_dbg(&adapter->hw, "Multiqueue %s: Rx Queue count = %u, " 1987 "Tx Queue count = %u\n", 1988 (adapter->num_rx_queues > 1) ? "Enabled" : 1989 "Disabled", adapter->num_rx_queues, adapter->num_tx_queues); 1990 1991 set_bit(__IXGBEVF_DOWN, &adapter->state); 1992 1993 return 0; 1994err_alloc_queues: 1995 ixgbevf_free_q_vectors(adapter); 1996err_alloc_q_vectors: 1997 ixgbevf_reset_interrupt_capability(adapter); 1998err_set_interrupt: 1999 return err; 2000} 2001 2002/** 2003 * ixgbevf_clear_interrupt_scheme - Clear the current interrupt scheme settings 2004 * @adapter: board private structure to clear interrupt scheme on 2005 * 2006 * We go through and clear interrupt specific resources and reset the structure 2007 * to pre-load conditions 2008 **/ 2009static void ixgbevf_clear_interrupt_scheme(struct ixgbevf_adapter *adapter) 2010{ 2011 adapter->num_tx_queues = 0; 2012 adapter->num_rx_queues = 0; 2013 2014 ixgbevf_free_q_vectors(adapter); 2015 ixgbevf_reset_interrupt_capability(adapter); 2016} 2017 2018/** 2019 * ixgbevf_sw_init - Initialize general software structures 2020 * (struct ixgbevf_adapter) 2021 * @adapter: board private structure to initialize 2022 * 2023 * ixgbevf_sw_init initializes the Adapter private data structure. 2024 * Fields are initialized based on PCI device information and 2025 * OS network device settings (MTU size). 2026 **/ 2027static int __devinit ixgbevf_sw_init(struct ixgbevf_adapter *adapter) 2028{ 2029 struct ixgbe_hw *hw = &adapter->hw; 2030 struct pci_dev *pdev = adapter->pdev; 2031 int err; 2032 2033 /* PCI config space info */ 2034 2035 hw->vendor_id = pdev->vendor; 2036 hw->device_id = pdev->device; 2037 hw->revision_id = pdev->revision; 2038 hw->subsystem_vendor_id = pdev->subsystem_vendor; 2039 hw->subsystem_device_id = pdev->subsystem_device; 2040 2041 hw->mbx.ops.init_params(hw); 2042 2043 /* assume legacy case in which PF would only give VF 2 queues */ 2044 hw->mac.max_tx_queues = 2; 2045 hw->mac.max_rx_queues = 2; 2046 2047 err = hw->mac.ops.reset_hw(hw); 2048 if (err) { 2049 dev_info(&pdev->dev, 2050 "PF still in reset state, assigning new address\n"); 2051 eth_hw_addr_random(adapter->netdev); 2052 memcpy(adapter->hw.mac.addr, adapter->netdev->dev_addr, 2053 adapter->netdev->addr_len); 2054 } else { 2055 err = hw->mac.ops.init_hw(hw); 2056 if (err) { 2057 pr_err("init_shared_code failed: %d\n", err); 2058 goto out; 2059 } 2060 memcpy(adapter->netdev->dev_addr, adapter->hw.mac.addr, 2061 adapter->netdev->addr_len); 2062 } 2063 2064 /* lock to protect mailbox accesses */ 2065 spin_lock_init(&adapter->mbx_lock); 2066 2067 /* Enable dynamic interrupt throttling rates */ 2068 adapter->rx_itr_setting = 1; 2069 adapter->tx_itr_setting = 1; 2070 2071 /* set default ring sizes */ 2072 adapter->tx_ring_count = IXGBEVF_DEFAULT_TXD; 2073 adapter->rx_ring_count = IXGBEVF_DEFAULT_RXD; 2074 2075 set_bit(__IXGBEVF_DOWN, &adapter->state); 2076 return 0; 2077 2078out: 2079 return err; 2080} 2081 2082#define UPDATE_VF_COUNTER_32bit(reg, last_counter, counter) \ 2083 { \ 2084 u32 current_counter = IXGBE_READ_REG(hw, reg); \ 2085 if (current_counter < last_counter) \ 2086 counter += 0x100000000LL; \ 2087 last_counter = current_counter; \ 2088 counter &= 0xFFFFFFFF00000000LL; \ 2089 counter |= current_counter; \ 2090 } 2091 2092#define UPDATE_VF_COUNTER_36bit(reg_lsb, reg_msb, last_counter, counter) \ 2093 { \ 2094 u64 current_counter_lsb = IXGBE_READ_REG(hw, reg_lsb); \ 2095 u64 current_counter_msb = IXGBE_READ_REG(hw, reg_msb); \ 2096 u64 current_counter = (current_counter_msb << 32) | \ 2097 current_counter_lsb; \ 2098 if (current_counter < last_counter) \ 2099 counter += 0x1000000000LL; \ 2100 last_counter = current_counter; \ 2101 counter &= 0xFFFFFFF000000000LL; \ 2102 counter |= current_counter; \ 2103 } 2104/** 2105 * ixgbevf_update_stats - Update the board statistics counters. 2106 * @adapter: board private structure 2107 **/ 2108void ixgbevf_update_stats(struct ixgbevf_adapter *adapter) 2109{ 2110 struct ixgbe_hw *hw = &adapter->hw; 2111 2112 UPDATE_VF_COUNTER_32bit(IXGBE_VFGPRC, adapter->stats.last_vfgprc, 2113 adapter->stats.vfgprc); 2114 UPDATE_VF_COUNTER_32bit(IXGBE_VFGPTC, adapter->stats.last_vfgptc, 2115 adapter->stats.vfgptc); 2116 UPDATE_VF_COUNTER_36bit(IXGBE_VFGORC_LSB, IXGBE_VFGORC_MSB, 2117 adapter->stats.last_vfgorc, 2118 adapter->stats.vfgorc); 2119 UPDATE_VF_COUNTER_36bit(IXGBE_VFGOTC_LSB, IXGBE_VFGOTC_MSB, 2120 adapter->stats.last_vfgotc, 2121 adapter->stats.vfgotc); 2122 UPDATE_VF_COUNTER_32bit(IXGBE_VFMPRC, adapter->stats.last_vfmprc, 2123 adapter->stats.vfmprc); 2124} 2125 2126/** 2127 * ixgbevf_watchdog - Timer Call-back 2128 * @data: pointer to adapter cast into an unsigned long 2129 **/ 2130static void ixgbevf_watchdog(unsigned long data) 2131{ 2132 struct ixgbevf_adapter *adapter = (struct ixgbevf_adapter *)data; 2133 struct ixgbe_hw *hw = &adapter->hw; 2134 u32 eics = 0; 2135 int i; 2136 2137 /* 2138 * Do the watchdog outside of interrupt context due to the lovely 2139 * delays that some of the newer hardware requires 2140 */ 2141 2142 if (test_bit(__IXGBEVF_DOWN, &adapter->state)) 2143 goto watchdog_short_circuit; 2144 2145 /* get one bit for every active tx/rx interrupt vector */ 2146 for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) { 2147 struct ixgbevf_q_vector *qv = adapter->q_vector[i]; 2148 if (qv->rx.ring || qv->tx.ring) 2149 eics |= 1 << i; 2150 } 2151 2152 IXGBE_WRITE_REG(hw, IXGBE_VTEICS, eics); 2153 2154watchdog_short_circuit: 2155 schedule_work(&adapter->watchdog_task); 2156} 2157 2158/** 2159 * ixgbevf_tx_timeout - Respond to a Tx Hang 2160 * @netdev: network interface device structure 2161 **/ 2162static void ixgbevf_tx_timeout(struct net_device *netdev) 2163{ 2164 struct ixgbevf_adapter *adapter = netdev_priv(netdev); 2165 2166 /* Do the reset outside of interrupt context */ 2167 schedule_work(&adapter->reset_task); 2168} 2169 2170static void ixgbevf_reset_task(struct work_struct *work) 2171{ 2172 struct ixgbevf_adapter *adapter; 2173 adapter = container_of(work, struct ixgbevf_adapter, reset_task); 2174 2175 /* If we're already down or resetting, just bail */ 2176 if (test_bit(__IXGBEVF_DOWN, &adapter->state) || 2177 test_bit(__IXGBEVF_RESETTING, &adapter->state)) 2178 return; 2179 2180 adapter->tx_timeout_count++; 2181 2182 ixgbevf_reinit_locked(adapter); 2183} 2184 2185/** 2186 * ixgbevf_watchdog_task - worker thread to bring link up 2187 * @work: pointer to work_struct containing our data 2188 **/ 2189static void ixgbevf_watchdog_task(struct work_struct *work) 2190{ 2191 struct ixgbevf_adapter *adapter = container_of(work, 2192 struct ixgbevf_adapter, 2193 watchdog_task); 2194 struct net_device *netdev = adapter->netdev; 2195 struct ixgbe_hw *hw = &adapter->hw; 2196 u32 link_speed = adapter->link_speed; 2197 bool link_up = adapter->link_up; 2198 2199 adapter->flags |= IXGBE_FLAG_IN_WATCHDOG_TASK; 2200 2201 /* 2202 * Always check the link on the watchdog because we have 2203 * no LSC interrupt 2204 */ 2205 if (hw->mac.ops.check_link) { 2206 s32 need_reset; 2207 2208 spin_lock_bh(&adapter->mbx_lock); 2209 2210 need_reset = hw->mac.ops.check_link(hw, &link_speed, 2211 &link_up, false); 2212 2213 spin_unlock_bh(&adapter->mbx_lock); 2214 2215 if (need_reset) { 2216 adapter->link_up = link_up; 2217 adapter->link_speed = link_speed; 2218 netif_carrier_off(netdev); 2219 netif_tx_stop_all_queues(netdev); 2220 schedule_work(&adapter->reset_task); 2221 goto pf_has_reset; 2222 } 2223 } else { 2224 /* always assume link is up, if no check link 2225 * function */ 2226 link_speed = IXGBE_LINK_SPEED_10GB_FULL; 2227 link_up = true; 2228 } 2229 adapter->link_up = link_up; 2230 adapter->link_speed = link_speed; 2231 2232 if (link_up) { 2233 if (!netif_carrier_ok(netdev)) { 2234 hw_dbg(&adapter->hw, "NIC Link is Up, %u Gbps\n", 2235 (link_speed == IXGBE_LINK_SPEED_10GB_FULL) ? 2236 10 : 1); 2237 netif_carrier_on(netdev); 2238 netif_tx_wake_all_queues(netdev); 2239 } 2240 } else { 2241 adapter->link_up = false; 2242 adapter->link_speed = 0; 2243 if (netif_carrier_ok(netdev)) { 2244 hw_dbg(&adapter->hw, "NIC Link is Down\n"); 2245 netif_carrier_off(netdev); 2246 netif_tx_stop_all_queues(netdev); 2247 } 2248 } 2249 2250 ixgbevf_update_stats(adapter); 2251 2252pf_has_reset: 2253 /* Reset the timer */ 2254 if (!test_bit(__IXGBEVF_DOWN, &adapter->state)) 2255 mod_timer(&adapter->watchdog_timer, 2256 round_jiffies(jiffies + (2 * HZ))); 2257 2258 adapter->flags &= ~IXGBE_FLAG_IN_WATCHDOG_TASK; 2259} 2260 2261/** 2262 * ixgbevf_free_tx_resources - Free Tx Resources per Queue 2263 * @adapter: board private structure 2264 * @tx_ring: Tx descriptor ring for a specific queue 2265 * 2266 * Free all transmit software resources 2267 **/ 2268void ixgbevf_free_tx_resources(struct ixgbevf_adapter *adapter, 2269 struct ixgbevf_ring *tx_ring) 2270{ 2271 struct pci_dev *pdev = adapter->pdev; 2272 2273 ixgbevf_clean_tx_ring(adapter, tx_ring); 2274 2275 vfree(tx_ring->tx_buffer_info); 2276 tx_ring->tx_buffer_info = NULL; 2277 2278 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc, 2279 tx_ring->dma); 2280 2281 tx_ring->desc = NULL; 2282} 2283 2284/** 2285 * ixgbevf_free_all_tx_resources - Free Tx Resources for All Queues 2286 * @adapter: board private structure 2287 * 2288 * Free all transmit software resources 2289 **/ 2290static void ixgbevf_free_all_tx_resources(struct ixgbevf_adapter *adapter) 2291{ 2292 int i; 2293 2294 for (i = 0; i < adapter->num_tx_queues; i++) 2295 if (adapter->tx_ring[i].desc) 2296 ixgbevf_free_tx_resources(adapter, 2297 &adapter->tx_ring[i]); 2298 2299} 2300 2301/** 2302 * ixgbevf_setup_tx_resources - allocate Tx resources (Descriptors) 2303 * @adapter: board private structure 2304 * @tx_ring: tx descriptor ring (for a specific queue) to setup 2305 * 2306 * Return 0 on success, negative on failure 2307 **/ 2308int ixgbevf_setup_tx_resources(struct ixgbevf_adapter *adapter, 2309 struct ixgbevf_ring *tx_ring) 2310{ 2311 struct pci_dev *pdev = adapter->pdev; 2312 int size; 2313 2314 size = sizeof(struct ixgbevf_tx_buffer) * tx_ring->count; 2315 tx_ring->tx_buffer_info = vzalloc(size); 2316 if (!tx_ring->tx_buffer_info) 2317 goto err; 2318 2319 /* round up to nearest 4K */ 2320 tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc); 2321 tx_ring->size = ALIGN(tx_ring->size, 4096); 2322 2323 tx_ring->desc = dma_alloc_coherent(&pdev->dev, tx_ring->size, 2324 &tx_ring->dma, GFP_KERNEL); 2325 if (!tx_ring->desc) 2326 goto err; 2327 2328 tx_ring->next_to_use = 0; 2329 tx_ring->next_to_clean = 0; 2330 return 0; 2331 2332err: 2333 vfree(tx_ring->tx_buffer_info); 2334 tx_ring->tx_buffer_info = NULL; 2335 hw_dbg(&adapter->hw, "Unable to allocate memory for the transmit " 2336 "descriptor ring\n"); 2337 return -ENOMEM; 2338} 2339 2340/** 2341 * ixgbevf_setup_all_tx_resources - allocate all queues Tx resources 2342 * @adapter: board private structure 2343 * 2344 * If this function returns with an error, then it's possible one or 2345 * more of the rings is populated (while the rest are not). It is the 2346 * callers duty to clean those orphaned rings. 2347 * 2348 * Return 0 on success, negative on failure 2349 **/ 2350static int ixgbevf_setup_all_tx_resources(struct ixgbevf_adapter *adapter) 2351{ 2352 int i, err = 0; 2353 2354 for (i = 0; i < adapter->num_tx_queues; i++) { 2355 err = ixgbevf_setup_tx_resources(adapter, &adapter->tx_ring[i]); 2356 if (!err) 2357 continue; 2358 hw_dbg(&adapter->hw, 2359 "Allocation for Tx Queue %u failed\n", i); 2360 break; 2361 } 2362 2363 return err; 2364} 2365 2366/** 2367 * ixgbevf_setup_rx_resources - allocate Rx resources (Descriptors) 2368 * @adapter: board private structure 2369 * @rx_ring: rx descriptor ring (for a specific queue) to setup 2370 * 2371 * Returns 0 on success, negative on failure 2372 **/ 2373int ixgbevf_setup_rx_resources(struct ixgbevf_adapter *adapter, 2374 struct ixgbevf_ring *rx_ring) 2375{ 2376 struct pci_dev *pdev = adapter->pdev; 2377 int size; 2378 2379 size = sizeof(struct ixgbevf_rx_buffer) * rx_ring->count; 2380 rx_ring->rx_buffer_info = vzalloc(size); 2381 if (!rx_ring->rx_buffer_info) 2382 goto alloc_failed; 2383 2384 /* Round up to nearest 4K */ 2385 rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc); 2386 rx_ring->size = ALIGN(rx_ring->size, 4096); 2387 2388 rx_ring->desc = dma_alloc_coherent(&pdev->dev, rx_ring->size, 2389 &rx_ring->dma, GFP_KERNEL); 2390 2391 if (!rx_ring->desc) { 2392 hw_dbg(&adapter->hw, 2393 "Unable to allocate memory for " 2394 "the receive descriptor ring\n"); 2395 vfree(rx_ring->rx_buffer_info); 2396 rx_ring->rx_buffer_info = NULL; 2397 goto alloc_failed; 2398 } 2399 2400 rx_ring->next_to_clean = 0; 2401 rx_ring->next_to_use = 0; 2402 2403 return 0; 2404alloc_failed: 2405 return -ENOMEM; 2406} 2407 2408/** 2409 * ixgbevf_setup_all_rx_resources - allocate all queues Rx resources 2410 * @adapter: board private structure 2411 * 2412 * If this function returns with an error, then it's possible one or 2413 * more of the rings is populated (while the rest are not). It is the 2414 * callers duty to clean those orphaned rings. 2415 * 2416 * Return 0 on success, negative on failure 2417 **/ 2418static int ixgbevf_setup_all_rx_resources(struct ixgbevf_adapter *adapter) 2419{ 2420 int i, err = 0; 2421 2422 for (i = 0; i < adapter->num_rx_queues; i++) { 2423 err = ixgbevf_setup_rx_resources(adapter, &adapter->rx_ring[i]); 2424 if (!err) 2425 continue; 2426 hw_dbg(&adapter->hw, 2427 "Allocation for Rx Queue %u failed\n", i); 2428 break; 2429 } 2430 return err; 2431} 2432 2433/** 2434 * ixgbevf_free_rx_resources - Free Rx Resources 2435 * @adapter: board private structure 2436 * @rx_ring: ring to clean the resources from 2437 * 2438 * Free all receive software resources 2439 **/ 2440void ixgbevf_free_rx_resources(struct ixgbevf_adapter *adapter, 2441 struct ixgbevf_ring *rx_ring) 2442{ 2443 struct pci_dev *pdev = adapter->pdev; 2444 2445 ixgbevf_clean_rx_ring(adapter, rx_ring); 2446 2447 vfree(rx_ring->rx_buffer_info); 2448 rx_ring->rx_buffer_info = NULL; 2449 2450 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc, 2451 rx_ring->dma); 2452 2453 rx_ring->desc = NULL; 2454} 2455 2456/** 2457 * ixgbevf_free_all_rx_resources - Free Rx Resources for All Queues 2458 * @adapter: board private structure 2459 * 2460 * Free all receive software resources 2461 **/ 2462static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter *adapter) 2463{ 2464 int i; 2465 2466 for (i = 0; i < adapter->num_rx_queues; i++) 2467 if (adapter->rx_ring[i].desc) 2468 ixgbevf_free_rx_resources(adapter, 2469 &adapter->rx_ring[i]); 2470} 2471 2472static int ixgbevf_setup_queues(struct ixgbevf_adapter *adapter) 2473{ 2474 struct ixgbe_hw *hw = &adapter->hw; 2475 struct ixgbevf_ring *rx_ring; 2476 unsigned int def_q = 0; 2477 unsigned int num_tcs = 0; 2478 unsigned int num_rx_queues = 1; 2479 int err, i; 2480 2481 spin_lock_bh(&adapter->mbx_lock); 2482 2483 /* fetch queue configuration from the PF */ 2484 err = ixgbevf_get_queues(hw, &num_tcs, &def_q); 2485 2486 spin_unlock_bh(&adapter->mbx_lock); 2487 2488 if (err) 2489 return err; 2490 2491 if (num_tcs > 1) { 2492 /* update default Tx ring register index */ 2493 adapter->tx_ring[0].reg_idx = def_q; 2494 2495 /* we need as many queues as traffic classes */ 2496 num_rx_queues = num_tcs; 2497 } 2498 2499 /* nothing to do if we have the correct number of queues */ 2500 if (adapter->num_rx_queues == num_rx_queues) 2501 return 0; 2502 2503 /* allocate new rings */ 2504 rx_ring = kcalloc(num_rx_queues, 2505 sizeof(struct ixgbevf_ring), GFP_KERNEL); 2506 if (!rx_ring) 2507 return -ENOMEM; 2508 2509 /* setup ring fields */ 2510 for (i = 0; i < num_rx_queues; i++) { 2511 rx_ring[i].count = adapter->rx_ring_count; 2512 rx_ring[i].queue_index = i; 2513 rx_ring[i].reg_idx = i; 2514 rx_ring[i].dev = &adapter->pdev->dev; 2515 rx_ring[i].netdev = adapter->netdev; 2516 } 2517 2518 /* free the existing ring and queues */ 2519 adapter->num_rx_queues = 0; 2520 kfree(adapter->rx_ring); 2521 2522 /* move new rings into position on the adapter struct */ 2523 adapter->rx_ring = rx_ring; 2524 adapter->num_rx_queues = num_rx_queues; 2525 2526 return 0; 2527} 2528 2529/** 2530 * ixgbevf_open - Called when a network interface is made active 2531 * @netdev: network interface device structure 2532 * 2533 * Returns 0 on success, negative value on failure 2534 * 2535 * The open entry point is called when a network interface is made 2536 * active by the system (IFF_UP). At this point all resources needed 2537 * for transmit and receive operations are allocated, the interrupt 2538 * handler is registered with the OS, the watchdog timer is started, 2539 * and the stack is notified that the interface is ready. 2540 **/ 2541static int ixgbevf_open(struct net_device *netdev) 2542{ 2543 struct ixgbevf_adapter *adapter = netdev_priv(netdev); 2544 struct ixgbe_hw *hw = &adapter->hw; 2545 int err; 2546 2547 /* disallow open during test */ 2548 if (test_bit(__IXGBEVF_TESTING, &adapter->state)) 2549 return -EBUSY; 2550 2551 if (hw->adapter_stopped) { 2552 ixgbevf_reset(adapter); 2553 /* if adapter is still stopped then PF isn't up and 2554 * the vf can't start. */ 2555 if (hw->adapter_stopped) { 2556 err = IXGBE_ERR_MBX; 2557 pr_err("Unable to start - perhaps the PF Driver isn't " 2558 "up yet\n"); 2559 goto err_setup_reset; 2560 } 2561 } 2562 2563 ixgbevf_negotiate_api(adapter); 2564 2565 /* setup queue reg_idx and Rx queue count */ 2566 err = ixgbevf_setup_queues(adapter); 2567 if (err) 2568 goto err_setup_queues; 2569 2570 /* allocate transmit descriptors */ 2571 err = ixgbevf_setup_all_tx_resources(adapter); 2572 if (err) 2573 goto err_setup_tx; 2574 2575 /* allocate receive descriptors */ 2576 err = ixgbevf_setup_all_rx_resources(adapter); 2577 if (err) 2578 goto err_setup_rx; 2579 2580 ixgbevf_configure(adapter); 2581 2582 /* 2583 * Map the Tx/Rx rings to the vectors we were allotted. 2584 * if request_irq will be called in this function map_rings 2585 * must be called *before* up_complete 2586 */ 2587 ixgbevf_map_rings_to_vectors(adapter); 2588 2589 ixgbevf_up_complete(adapter); 2590 2591 /* clear any pending interrupts, may auto mask */ 2592 IXGBE_READ_REG(hw, IXGBE_VTEICR); 2593 err = ixgbevf_request_irq(adapter); 2594 if (err) 2595 goto err_req_irq; 2596 2597 ixgbevf_irq_enable(adapter); 2598 2599 return 0; 2600 2601err_req_irq: 2602 ixgbevf_down(adapter); 2603 ixgbevf_free_irq(adapter); 2604err_setup_rx: 2605 ixgbevf_free_all_rx_resources(adapter); 2606err_setup_tx: 2607 ixgbevf_free_all_tx_resources(adapter); 2608err_setup_queues: 2609 ixgbevf_reset(adapter); 2610 2611err_setup_reset: 2612 2613 return err; 2614} 2615 2616/** 2617 * ixgbevf_close - Disables a network interface 2618 * @netdev: network interface device structure 2619 * 2620 * Returns 0, this is not allowed to fail 2621 * 2622 * The close entry point is called when an interface is de-activated 2623 * by the OS. The hardware is still under the drivers control, but 2624 * needs to be disabled. A global MAC reset is issued to stop the 2625 * hardware, and all transmit and receive resources are freed. 2626 **/ 2627static int ixgbevf_close(struct net_device *netdev) 2628{ 2629 struct ixgbevf_adapter *adapter = netdev_priv(netdev); 2630 2631 ixgbevf_down(adapter); 2632 ixgbevf_free_irq(adapter); 2633 2634 ixgbevf_free_all_tx_resources(adapter); 2635 ixgbevf_free_all_rx_resources(adapter); 2636 2637 return 0; 2638} 2639 2640static void ixgbevf_tx_ctxtdesc(struct ixgbevf_ring *tx_ring, 2641 u32 vlan_macip_lens, u32 type_tucmd, 2642 u32 mss_l4len_idx) 2643{ 2644 struct ixgbe_adv_tx_context_desc *context_desc; 2645 u16 i = tx_ring->next_to_use; 2646 2647 context_desc = IXGBEVF_TX_CTXTDESC(tx_ring, i); 2648 2649 i++; 2650 tx_ring->next_to_use = (i < tx_ring->count) ? i : 0; 2651 2652 /* set bits to identify this as an advanced context descriptor */ 2653 type_tucmd |= IXGBE_TXD_CMD_DEXT | IXGBE_ADVTXD_DTYP_CTXT; 2654 2655 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens); 2656 context_desc->seqnum_seed = 0; 2657 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd); 2658 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx); 2659} 2660 2661static int ixgbevf_tso(struct ixgbevf_ring *tx_ring, 2662 struct sk_buff *skb, u32 tx_flags, u8 *hdr_len) 2663{ 2664 u32 vlan_macip_lens, type_tucmd; 2665 u32 mss_l4len_idx, l4len; 2666 2667 if (!skb_is_gso(skb)) 2668 return 0; 2669 2670 if (skb_header_cloned(skb)) { 2671 int err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC); 2672 if (err) 2673 return err; 2674 } 2675 2676 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */ 2677 type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP; 2678 2679 if (skb->protocol == htons(ETH_P_IP)) { 2680 struct iphdr *iph = ip_hdr(skb); 2681 iph->tot_len = 0; 2682 iph->check = 0; 2683 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, 2684 iph->daddr, 0, 2685 IPPROTO_TCP, 2686 0); 2687 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4; 2688 } else if (skb_is_gso_v6(skb)) { 2689 ipv6_hdr(skb)->payload_len = 0; 2690 tcp_hdr(skb)->check = 2691 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, 2692 &ipv6_hdr(skb)->daddr, 2693 0, IPPROTO_TCP, 0); 2694 } 2695 2696 /* compute header lengths */ 2697 l4len = tcp_hdrlen(skb); 2698 *hdr_len += l4len; 2699 *hdr_len = skb_transport_offset(skb) + l4len; 2700 2701 /* mss_l4len_id: use 1 as index for TSO */ 2702 mss_l4len_idx = l4len << IXGBE_ADVTXD_L4LEN_SHIFT; 2703 mss_l4len_idx |= skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT; 2704 mss_l4len_idx |= 1 << IXGBE_ADVTXD_IDX_SHIFT; 2705 2706 /* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */ 2707 vlan_macip_lens = skb_network_header_len(skb); 2708 vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT; 2709 vlan_macip_lens |= tx_flags & IXGBE_TX_FLAGS_VLAN_MASK; 2710 2711 ixgbevf_tx_ctxtdesc(tx_ring, vlan_macip_lens, 2712 type_tucmd, mss_l4len_idx); 2713 2714 return 1; 2715} 2716 2717static bool ixgbevf_tx_csum(struct ixgbevf_ring *tx_ring, 2718 struct sk_buff *skb, u32 tx_flags) 2719{ 2720 2721 2722 2723 u32 vlan_macip_lens = 0; 2724 u32 mss_l4len_idx = 0; 2725 u32 type_tucmd = 0; 2726 2727 if (skb->ip_summed == CHECKSUM_PARTIAL) { 2728 u8 l4_hdr = 0; 2729 switch (skb->protocol) { 2730 case __constant_htons(ETH_P_IP): 2731 vlan_macip_lens |= skb_network_header_len(skb); 2732 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4; 2733 l4_hdr = ip_hdr(skb)->protocol; 2734 break; 2735 case __constant_htons(ETH_P_IPV6): 2736 vlan_macip_lens |= skb_network_header_len(skb); 2737 l4_hdr = ipv6_hdr(skb)->nexthdr; 2738 break; 2739 default: 2740 if (unlikely(net_ratelimit())) { 2741 dev_warn(tx_ring->dev, 2742 "partial checksum but proto=%x!\n", 2743 skb->protocol); 2744 } 2745 break; 2746 } 2747 2748 switch (l4_hdr) { 2749 case IPPROTO_TCP: 2750 type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_TCP; 2751 mss_l4len_idx = tcp_hdrlen(skb) << 2752 IXGBE_ADVTXD_L4LEN_SHIFT; 2753 break; 2754 case IPPROTO_SCTP: 2755 type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_SCTP; 2756 mss_l4len_idx = sizeof(struct sctphdr) << 2757 IXGBE_ADVTXD_L4LEN_SHIFT; 2758 break; 2759 case IPPROTO_UDP: 2760 mss_l4len_idx = sizeof(struct udphdr) << 2761 IXGBE_ADVTXD_L4LEN_SHIFT; 2762 break; 2763 default: 2764 if (unlikely(net_ratelimit())) { 2765 dev_warn(tx_ring->dev, 2766 "partial checksum but l4 proto=%x!\n", 2767 l4_hdr); 2768 } 2769 break; 2770 } 2771 } 2772 2773 /* vlan_macip_lens: MACLEN, VLAN tag */ 2774 vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT; 2775 vlan_macip_lens |= tx_flags & IXGBE_TX_FLAGS_VLAN_MASK; 2776 2777 ixgbevf_tx_ctxtdesc(tx_ring, vlan_macip_lens, 2778 type_tucmd, mss_l4len_idx); 2779 2780 return (skb->ip_summed == CHECKSUM_PARTIAL); 2781} 2782 2783static int ixgbevf_tx_map(struct ixgbevf_ring *tx_ring, 2784 struct sk_buff *skb, u32 tx_flags, 2785 unsigned int first) 2786{ 2787 struct ixgbevf_tx_buffer *tx_buffer_info; 2788 unsigned int len; 2789 unsigned int total = skb->len; 2790 unsigned int offset = 0, size; 2791 int count = 0; 2792 unsigned int nr_frags = skb_shinfo(skb)->nr_frags; 2793 unsigned int f; 2794 int i; 2795 2796 i = tx_ring->next_to_use; 2797 2798 len = min(skb_headlen(skb), total); 2799 while (len) { 2800 tx_buffer_info = &tx_ring->tx_buffer_info[i]; 2801 size = min(len, (unsigned int)IXGBE_MAX_DATA_PER_TXD); 2802 2803 tx_buffer_info->length = size; 2804 tx_buffer_info->mapped_as_page = false; 2805 tx_buffer_info->dma = dma_map_single(tx_ring->dev, 2806 skb->data + offset, 2807 size, DMA_TO_DEVICE); 2808 if (dma_mapping_error(tx_ring->dev, tx_buffer_info->dma)) 2809 goto dma_error; 2810 tx_buffer_info->next_to_watch = i; 2811 2812 len -= size; 2813 total -= size; 2814 offset += size; 2815 count++; 2816 i++; 2817 if (i == tx_ring->count) 2818 i = 0; 2819 } 2820 2821 for (f = 0; f < nr_frags; f++) { 2822 const struct skb_frag_struct *frag; 2823 2824 frag = &skb_shinfo(skb)->frags[f]; 2825 len = min((unsigned int)skb_frag_size(frag), total); 2826 offset = 0; 2827 2828 while (len) { 2829 tx_buffer_info = &tx_ring->tx_buffer_info[i]; 2830 size = min(len, (unsigned int)IXGBE_MAX_DATA_PER_TXD); 2831 2832 tx_buffer_info->length = size; 2833 tx_buffer_info->dma = 2834 skb_frag_dma_map(tx_ring->dev, frag, 2835 offset, size, DMA_TO_DEVICE); 2836 if (dma_mapping_error(tx_ring->dev, 2837 tx_buffer_info->dma)) 2838 goto dma_error; 2839 tx_buffer_info->mapped_as_page = true; 2840 tx_buffer_info->next_to_watch = i; 2841 2842 len -= size; 2843 total -= size; 2844 offset += size; 2845 count++; 2846 i++; 2847 if (i == tx_ring->count) 2848 i = 0; 2849 } 2850 if (total == 0) 2851 break; 2852 } 2853 2854 if (i == 0) 2855 i = tx_ring->count - 1; 2856 else 2857 i = i - 1; 2858 tx_ring->tx_buffer_info[i].skb = skb; 2859 tx_ring->tx_buffer_info[first].next_to_watch = i; 2860 tx_ring->tx_buffer_info[first].time_stamp = jiffies; 2861 2862 return count; 2863 2864dma_error: 2865 dev_err(tx_ring->dev, "TX DMA map failed\n"); 2866 2867 /* clear timestamp and dma mappings for failed tx_buffer_info map */ 2868 tx_buffer_info->dma = 0; 2869 tx_buffer_info->next_to_watch = 0; 2870 count--; 2871 2872 /* clear timestamp and dma mappings for remaining portion of packet */ 2873 while (count >= 0) { 2874 count--; 2875 i--; 2876 if (i < 0) 2877 i += tx_ring->count; 2878 tx_buffer_info = &tx_ring->tx_buffer_info[i]; 2879 ixgbevf_unmap_and_free_tx_resource(tx_ring, tx_buffer_info); 2880 } 2881 2882 return count; 2883} 2884 2885static void ixgbevf_tx_queue(struct ixgbevf_ring *tx_ring, int tx_flags, 2886 int count, u32 paylen, u8 hdr_len) 2887{ 2888 union ixgbe_adv_tx_desc *tx_desc = NULL; 2889 struct ixgbevf_tx_buffer *tx_buffer_info; 2890 u32 olinfo_status = 0, cmd_type_len = 0; 2891 unsigned int i; 2892 2893 u32 txd_cmd = IXGBE_TXD_CMD_EOP | IXGBE_TXD_CMD_RS | IXGBE_TXD_CMD_IFCS; 2894 2895 cmd_type_len |= IXGBE_ADVTXD_DTYP_DATA; 2896 2897 cmd_type_len |= IXGBE_ADVTXD_DCMD_IFCS | IXGBE_ADVTXD_DCMD_DEXT; 2898 2899 if (tx_flags & IXGBE_TX_FLAGS_VLAN) 2900 cmd_type_len |= IXGBE_ADVTXD_DCMD_VLE; 2901 2902 if (tx_flags & IXGBE_TX_FLAGS_CSUM) 2903 olinfo_status |= IXGBE_ADVTXD_POPTS_TXSM; 2904 2905 if (tx_flags & IXGBE_TX_FLAGS_TSO) { 2906 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE; 2907 2908 /* use index 1 context for tso */ 2909 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT); 2910 if (tx_flags & IXGBE_TX_FLAGS_IPV4) 2911 olinfo_status |= IXGBE_ADVTXD_POPTS_IXSM; 2912 2913 } 2914 2915 /* 2916 * Check Context must be set if Tx switch is enabled, which it 2917 * always is for case where virtual functions are running 2918 */ 2919 olinfo_status |= IXGBE_ADVTXD_CC; 2920 2921 olinfo_status |= ((paylen - hdr_len) << IXGBE_ADVTXD_PAYLEN_SHIFT); 2922 2923 i = tx_ring->next_to_use; 2924 while (count--) { 2925 tx_buffer_info = &tx_ring->tx_buffer_info[i]; 2926 tx_desc = IXGBEVF_TX_DESC(tx_ring, i); 2927 tx_desc->read.buffer_addr = cpu_to_le64(tx_buffer_info->dma); 2928 tx_desc->read.cmd_type_len = 2929 cpu_to_le32(cmd_type_len | tx_buffer_info->length); 2930 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status); 2931 i++; 2932 if (i == tx_ring->count) 2933 i = 0; 2934 } 2935 2936 tx_desc->read.cmd_type_len |= cpu_to_le32(txd_cmd); 2937 2938 tx_ring->next_to_use = i; 2939} 2940 2941static int __ixgbevf_maybe_stop_tx(struct ixgbevf_ring *tx_ring, int size) 2942{ 2943 struct ixgbevf_adapter *adapter = netdev_priv(tx_ring->netdev); 2944 2945 netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index); 2946 /* Herbert's original patch had: 2947 * smp_mb__after_netif_stop_queue(); 2948 * but since that doesn't exist yet, just open code it. */ 2949 smp_mb(); 2950 2951 /* We need to check again in a case another CPU has just 2952 * made room available. */ 2953 if (likely(IXGBE_DESC_UNUSED(tx_ring) < size)) 2954 return -EBUSY; 2955 2956 /* A reprieve! - use start_queue because it doesn't call schedule */ 2957 netif_start_subqueue(tx_ring->netdev, tx_ring->queue_index); 2958 ++adapter->restart_queue; 2959 return 0; 2960} 2961 2962static int ixgbevf_maybe_stop_tx(struct ixgbevf_ring *tx_ring, int size) 2963{ 2964 if (likely(IXGBE_DESC_UNUSED(tx_ring) >= size)) 2965 return 0; 2966 return __ixgbevf_maybe_stop_tx(tx_ring, size); 2967} 2968 2969static int ixgbevf_xmit_frame(struct sk_buff *skb, struct net_device *netdev) 2970{ 2971 struct ixgbevf_adapter *adapter = netdev_priv(netdev); 2972 struct ixgbevf_ring *tx_ring; 2973 unsigned int first; 2974 unsigned int tx_flags = 0; 2975 u8 hdr_len = 0; 2976 int r_idx = 0, tso; 2977 u16 count = TXD_USE_COUNT(skb_headlen(skb)); 2978#if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD 2979 unsigned short f; 2980#endif 2981 u8 *dst_mac = skb_header_pointer(skb, 0, 0, NULL); 2982 if (!dst_mac || is_link_local_ether_addr(dst_mac)) { 2983 dev_kfree_skb(skb); 2984 return NETDEV_TX_OK; 2985 } 2986 2987 tx_ring = &adapter->tx_ring[r_idx]; 2988 2989 /* 2990 * need: 1 descriptor per page * PAGE_SIZE/IXGBE_MAX_DATA_PER_TXD, 2991 * + 1 desc for skb_headlen/IXGBE_MAX_DATA_PER_TXD, 2992 * + 2 desc gap to keep tail from touching head, 2993 * + 1 desc for context descriptor, 2994 * otherwise try next time 2995 */ 2996#if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD 2997 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) 2998 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size); 2999#else 3000 count += skb_shinfo(skb)->nr_frags; 3001#endif 3002 if (ixgbevf_maybe_stop_tx(tx_ring, count + 3)) { 3003 adapter->tx_busy++; 3004 return NETDEV_TX_BUSY; 3005 } 3006 3007 if (vlan_tx_tag_present(skb)) { 3008 tx_flags |= vlan_tx_tag_get(skb); 3009 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT; 3010 tx_flags |= IXGBE_TX_FLAGS_VLAN; 3011 } 3012 3013 first = tx_ring->next_to_use; 3014 3015 if (skb->protocol == htons(ETH_P_IP)) 3016 tx_flags |= IXGBE_TX_FLAGS_IPV4; 3017 tso = ixgbevf_tso(tx_ring, skb, tx_flags, &hdr_len); 3018 if (tso < 0) { 3019 dev_kfree_skb_any(skb); 3020 return NETDEV_TX_OK; 3021 } 3022 3023 if (tso) 3024 tx_flags |= IXGBE_TX_FLAGS_TSO | IXGBE_TX_FLAGS_CSUM; 3025 else if (ixgbevf_tx_csum(tx_ring, skb, tx_flags)) 3026 tx_flags |= IXGBE_TX_FLAGS_CSUM; 3027 3028 ixgbevf_tx_queue(tx_ring, tx_flags, 3029 ixgbevf_tx_map(tx_ring, skb, tx_flags, first), 3030 skb->len, hdr_len); 3031 /* 3032 * Force memory writes to complete before letting h/w 3033 * know there are new descriptors to fetch. (Only 3034 * applicable for weak-ordered memory model archs, 3035 * such as IA-64). 3036 */ 3037 wmb(); 3038 3039 writel(tx_ring->next_to_use, adapter->hw.hw_addr + tx_ring->tail); 3040 3041 ixgbevf_maybe_stop_tx(tx_ring, DESC_NEEDED); 3042 3043 return NETDEV_TX_OK; 3044} 3045 3046/** 3047 * ixgbevf_set_mac - Change the Ethernet Address of the NIC 3048 * @netdev: network interface device structure 3049 * @p: pointer to an address structure 3050 * 3051 * Returns 0 on success, negative on failure 3052 **/ 3053static int ixgbevf_set_mac(struct net_device *netdev, void *p) 3054{ 3055 struct ixgbevf_adapter *adapter = netdev_priv(netdev); 3056 struct ixgbe_hw *hw = &adapter->hw; 3057 struct sockaddr *addr = p; 3058 3059 if (!is_valid_ether_addr(addr->sa_data)) 3060 return -EADDRNOTAVAIL; 3061 3062 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); 3063 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len); 3064 3065 spin_lock_bh(&adapter->mbx_lock); 3066 3067 if (hw->mac.ops.set_rar) 3068 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0); 3069 3070 spin_unlock_bh(&adapter->mbx_lock); 3071 3072 return 0; 3073} 3074 3075/** 3076 * ixgbevf_change_mtu - Change the Maximum Transfer Unit 3077 * @netdev: network interface device structure 3078 * @new_mtu: new value for maximum frame size 3079 * 3080 * Returns 0 on success, negative on failure 3081 **/ 3082static int ixgbevf_change_mtu(struct net_device *netdev, int new_mtu) 3083{ 3084 struct ixgbevf_adapter *adapter = netdev_priv(netdev); 3085 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN; 3086 int max_possible_frame = MAXIMUM_ETHERNET_VLAN_SIZE; 3087 3088 switch (adapter->hw.api_version) { 3089 case ixgbe_mbox_api_11: 3090 max_possible_frame = IXGBE_MAX_JUMBO_FRAME_SIZE; 3091 break; 3092 default: 3093 if (adapter->hw.mac.type == ixgbe_mac_X540_vf) 3094 max_possible_frame = IXGBE_MAX_JUMBO_FRAME_SIZE; 3095 break; 3096 } 3097 3098 /* MTU < 68 is an error and causes problems on some kernels */ 3099 if ((new_mtu < 68) || (max_frame > max_possible_frame)) 3100 return -EINVAL; 3101 3102 hw_dbg(&adapter->hw, "changing MTU from %d to %d\n", 3103 netdev->mtu, new_mtu); 3104 /* must set new MTU before calling down or up */ 3105 netdev->mtu = new_mtu; 3106 3107 if (netif_running(netdev)) 3108 ixgbevf_reinit_locked(adapter); 3109 3110 return 0; 3111} 3112 3113static int ixgbevf_suspend(struct pci_dev *pdev, pm_message_t state) 3114{ 3115 struct net_device *netdev = pci_get_drvdata(pdev); 3116 struct ixgbevf_adapter *adapter = netdev_priv(netdev); 3117#ifdef CONFIG_PM 3118 int retval = 0; 3119#endif 3120 3121 netif_device_detach(netdev); 3122 3123 if (netif_running(netdev)) { 3124 rtnl_lock(); 3125 ixgbevf_down(adapter); 3126 ixgbevf_free_irq(adapter); 3127 ixgbevf_free_all_tx_resources(adapter); 3128 ixgbevf_free_all_rx_resources(adapter); 3129 rtnl_unlock(); 3130 } 3131 3132 ixgbevf_clear_interrupt_scheme(adapter); 3133 3134#ifdef CONFIG_PM 3135 retval = pci_save_state(pdev); 3136 if (retval) 3137 return retval; 3138 3139#endif 3140 pci_disable_device(pdev); 3141 3142 return 0; 3143} 3144 3145#ifdef CONFIG_PM 3146static int ixgbevf_resume(struct pci_dev *pdev) 3147{ 3148 struct ixgbevf_adapter *adapter = pci_get_drvdata(pdev); 3149 struct net_device *netdev = adapter->netdev; 3150 u32 err; 3151 3152 pci_set_power_state(pdev, PCI_D0); 3153 pci_restore_state(pdev); 3154 /* 3155 * pci_restore_state clears dev->state_saved so call 3156 * pci_save_state to restore it. 3157 */ 3158 pci_save_state(pdev); 3159 3160 err = pci_enable_device_mem(pdev); 3161 if (err) { 3162 dev_err(&pdev->dev, "Cannot enable PCI device from suspend\n"); 3163 return err; 3164 } 3165 pci_set_master(pdev); 3166 3167 rtnl_lock(); 3168 err = ixgbevf_init_interrupt_scheme(adapter); 3169 rtnl_unlock(); 3170 if (err) { 3171 dev_err(&pdev->dev, "Cannot initialize interrupts\n"); 3172 return err; 3173 } 3174 3175 ixgbevf_reset(adapter); 3176 3177 if (netif_running(netdev)) { 3178 err = ixgbevf_open(netdev); 3179 if (err) 3180 return err; 3181 } 3182 3183 netif_device_attach(netdev); 3184 3185 return err; 3186} 3187 3188#endif /* CONFIG_PM */ 3189static void ixgbevf_shutdown(struct pci_dev *pdev) 3190{ 3191 ixgbevf_suspend(pdev, PMSG_SUSPEND); 3192} 3193 3194static struct rtnl_link_stats64 *ixgbevf_get_stats(struct net_device *netdev, 3195 struct rtnl_link_stats64 *stats) 3196{ 3197 struct ixgbevf_adapter *adapter = netdev_priv(netdev); 3198 unsigned int start; 3199 u64 bytes, packets; 3200 const struct ixgbevf_ring *ring; 3201 int i; 3202 3203 ixgbevf_update_stats(adapter); 3204 3205 stats->multicast = adapter->stats.vfmprc - adapter->stats.base_vfmprc; 3206 3207 for (i = 0; i < adapter->num_rx_queues; i++) { 3208 ring = &adapter->rx_ring[i]; 3209 do { 3210 start = u64_stats_fetch_begin_bh(&ring->syncp); 3211 bytes = ring->total_bytes; 3212 packets = ring->total_packets; 3213 } while (u64_stats_fetch_retry_bh(&ring->syncp, start)); 3214 stats->rx_bytes += bytes; 3215 stats->rx_packets += packets; 3216 } 3217 3218 for (i = 0; i < adapter->num_tx_queues; i++) { 3219 ring = &adapter->tx_ring[i]; 3220 do { 3221 start = u64_stats_fetch_begin_bh(&ring->syncp); 3222 bytes = ring->total_bytes; 3223 packets = ring->total_packets; 3224 } while (u64_stats_fetch_retry_bh(&ring->syncp, start)); 3225 stats->tx_bytes += bytes; 3226 stats->tx_packets += packets; 3227 } 3228 3229 return stats; 3230} 3231 3232static const struct net_device_ops ixgbevf_netdev_ops = { 3233 .ndo_open = ixgbevf_open, 3234 .ndo_stop = ixgbevf_close, 3235 .ndo_start_xmit = ixgbevf_xmit_frame, 3236 .ndo_set_rx_mode = ixgbevf_set_rx_mode, 3237 .ndo_get_stats64 = ixgbevf_get_stats, 3238 .ndo_validate_addr = eth_validate_addr, 3239 .ndo_set_mac_address = ixgbevf_set_mac, 3240 .ndo_change_mtu = ixgbevf_change_mtu, 3241 .ndo_tx_timeout = ixgbevf_tx_timeout, 3242 .ndo_vlan_rx_add_vid = ixgbevf_vlan_rx_add_vid, 3243 .ndo_vlan_rx_kill_vid = ixgbevf_vlan_rx_kill_vid, 3244}; 3245 3246static void ixgbevf_assign_netdev_ops(struct net_device *dev) 3247{ 3248 dev->netdev_ops = &ixgbevf_netdev_ops; 3249 ixgbevf_set_ethtool_ops(dev); 3250 dev->watchdog_timeo = 5 * HZ; 3251} 3252 3253/** 3254 * ixgbevf_probe - Device Initialization Routine 3255 * @pdev: PCI device information struct 3256 * @ent: entry in ixgbevf_pci_tbl 3257 * 3258 * Returns 0 on success, negative on failure 3259 * 3260 * ixgbevf_probe initializes an adapter identified by a pci_dev structure. 3261 * The OS initialization, configuring of the adapter private structure, 3262 * and a hardware reset occur. 3263 **/ 3264static int __devinit ixgbevf_probe(struct pci_dev *pdev, 3265 const struct pci_device_id *ent) 3266{ 3267 struct net_device *netdev; 3268 struct ixgbevf_adapter *adapter = NULL; 3269 struct ixgbe_hw *hw = NULL; 3270 const struct ixgbevf_info *ii = ixgbevf_info_tbl[ent->driver_data]; 3271 static int cards_found; 3272 int err, pci_using_dac; 3273 3274 err = pci_enable_device(pdev); 3275 if (err) 3276 return err; 3277 3278 if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)) && 3279 !dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64))) { 3280 pci_using_dac = 1; 3281 } else { 3282 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); 3283 if (err) { 3284 err = dma_set_coherent_mask(&pdev->dev, 3285 DMA_BIT_MASK(32)); 3286 if (err) { 3287 dev_err(&pdev->dev, "No usable DMA " 3288 "configuration, aborting\n"); 3289 goto err_dma; 3290 } 3291 } 3292 pci_using_dac = 0; 3293 } 3294 3295 err = pci_request_regions(pdev, ixgbevf_driver_name); 3296 if (err) { 3297 dev_err(&pdev->dev, "pci_request_regions failed 0x%x\n", err); 3298 goto err_pci_reg; 3299 } 3300 3301 pci_set_master(pdev); 3302 3303 netdev = alloc_etherdev_mq(sizeof(struct ixgbevf_adapter), 3304 MAX_TX_QUEUES); 3305 if (!netdev) { 3306 err = -ENOMEM; 3307 goto err_alloc_etherdev; 3308 } 3309 3310 SET_NETDEV_DEV(netdev, &pdev->dev); 3311 3312 pci_set_drvdata(pdev, netdev); 3313 adapter = netdev_priv(netdev); 3314 3315 adapter->netdev = netdev; 3316 adapter->pdev = pdev; 3317 hw = &adapter->hw; 3318 hw->back = adapter; 3319 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE); 3320 3321 /* 3322 * call save state here in standalone driver because it relies on 3323 * adapter struct to exist, and needs to call netdev_priv 3324 */ 3325 pci_save_state(pdev); 3326 3327 hw->hw_addr = ioremap(pci_resource_start(pdev, 0), 3328 pci_resource_len(pdev, 0)); 3329 if (!hw->hw_addr) { 3330 err = -EIO; 3331 goto err_ioremap; 3332 } 3333 3334 ixgbevf_assign_netdev_ops(netdev); 3335 3336 adapter->bd_number = cards_found; 3337 3338 /* Setup hw api */ 3339 memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops)); 3340 hw->mac.type = ii->mac; 3341 3342 memcpy(&hw->mbx.ops, &ixgbevf_mbx_ops, 3343 sizeof(struct ixgbe_mbx_operations)); 3344 3345 /* setup the private structure */ 3346 err = ixgbevf_sw_init(adapter); 3347 if (err) 3348 goto err_sw_init; 3349 3350 /* The HW MAC address was set and/or determined in sw_init */ 3351 memcpy(netdev->perm_addr, adapter->hw.mac.addr, netdev->addr_len); 3352 3353 if (!is_valid_ether_addr(netdev->dev_addr)) { 3354 pr_err("invalid MAC address\n"); 3355 err = -EIO; 3356 goto err_sw_init; 3357 } 3358 3359 netdev->hw_features = NETIF_F_SG | 3360 NETIF_F_IP_CSUM | 3361 NETIF_F_IPV6_CSUM | 3362 NETIF_F_TSO | 3363 NETIF_F_TSO6 | 3364 NETIF_F_RXCSUM; 3365 3366 netdev->features = netdev->hw_features | 3367 NETIF_F_HW_VLAN_TX | 3368 NETIF_F_HW_VLAN_RX | 3369 NETIF_F_HW_VLAN_FILTER; 3370 3371 netdev->vlan_features |= NETIF_F_TSO; 3372 netdev->vlan_features |= NETIF_F_TSO6; 3373 netdev->vlan_features |= NETIF_F_IP_CSUM; 3374 netdev->vlan_features |= NETIF_F_IPV6_CSUM; 3375 netdev->vlan_features |= NETIF_F_SG; 3376 3377 if (pci_using_dac) 3378 netdev->features |= NETIF_F_HIGHDMA; 3379 3380 netdev->priv_flags |= IFF_UNICAST_FLT; 3381 3382 init_timer(&adapter->watchdog_timer); 3383 adapter->watchdog_timer.function = ixgbevf_watchdog; 3384 adapter->watchdog_timer.data = (unsigned long)adapter; 3385 3386 INIT_WORK(&adapter->reset_task, ixgbevf_reset_task); 3387 INIT_WORK(&adapter->watchdog_task, ixgbevf_watchdog_task); 3388 3389 err = ixgbevf_init_interrupt_scheme(adapter); 3390 if (err) 3391 goto err_sw_init; 3392 3393 /* pick up the PCI bus settings for reporting later */ 3394 if (hw->mac.ops.get_bus_info) 3395 hw->mac.ops.get_bus_info(hw); 3396 3397 strcpy(netdev->name, "eth%d"); 3398 3399 err = register_netdev(netdev); 3400 if (err) 3401 goto err_register; 3402 3403 netif_carrier_off(netdev); 3404 3405 ixgbevf_init_last_counter_stats(adapter); 3406 3407 /* print the MAC address */ 3408 hw_dbg(hw, "%pM\n", netdev->dev_addr); 3409 3410 hw_dbg(hw, "MAC: %d\n", hw->mac.type); 3411 3412 hw_dbg(hw, "Intel(R) 82599 Virtual Function\n"); 3413 cards_found++; 3414 return 0; 3415 3416err_register: 3417 ixgbevf_clear_interrupt_scheme(adapter); 3418err_sw_init: 3419 ixgbevf_reset_interrupt_capability(adapter); 3420 iounmap(hw->hw_addr); 3421err_ioremap: 3422 free_netdev(netdev); 3423err_alloc_etherdev: 3424 pci_release_regions(pdev); 3425err_pci_reg: 3426err_dma: 3427 pci_disable_device(pdev); 3428 return err; 3429} 3430 3431/** 3432 * ixgbevf_remove - Device Removal Routine 3433 * @pdev: PCI device information struct 3434 * 3435 * ixgbevf_remove is called by the PCI subsystem to alert the driver 3436 * that it should release a PCI device. The could be caused by a 3437 * Hot-Plug event, or because the driver is going to be removed from 3438 * memory. 3439 **/ 3440static void __devexit ixgbevf_remove(struct pci_dev *pdev) 3441{ 3442 struct net_device *netdev = pci_get_drvdata(pdev); 3443 struct ixgbevf_adapter *adapter = netdev_priv(netdev); 3444 3445 set_bit(__IXGBEVF_DOWN, &adapter->state); 3446 3447 del_timer_sync(&adapter->watchdog_timer); 3448 3449 cancel_work_sync(&adapter->reset_task); 3450 cancel_work_sync(&adapter->watchdog_task); 3451 3452 if (netdev->reg_state == NETREG_REGISTERED) 3453 unregister_netdev(netdev); 3454 3455 ixgbevf_clear_interrupt_scheme(adapter); 3456 ixgbevf_reset_interrupt_capability(adapter); 3457 3458 iounmap(adapter->hw.hw_addr); 3459 pci_release_regions(pdev); 3460 3461 hw_dbg(&adapter->hw, "Remove complete\n"); 3462 3463 kfree(adapter->tx_ring); 3464 kfree(adapter->rx_ring); 3465 3466 free_netdev(netdev); 3467 3468 pci_disable_device(pdev); 3469} 3470 3471/** 3472 * ixgbevf_io_error_detected - called when PCI error is detected 3473 * @pdev: Pointer to PCI device 3474 * @state: The current pci connection state 3475 * 3476 * This function is called after a PCI bus error affecting 3477 * this device has been detected. 3478 */ 3479static pci_ers_result_t ixgbevf_io_error_detected(struct pci_dev *pdev, 3480 pci_channel_state_t state) 3481{ 3482 struct net_device *netdev = pci_get_drvdata(pdev); 3483 struct ixgbevf_adapter *adapter = netdev_priv(netdev); 3484 3485 netif_device_detach(netdev); 3486 3487 if (state == pci_channel_io_perm_failure) 3488 return PCI_ERS_RESULT_DISCONNECT; 3489 3490 if (netif_running(netdev)) 3491 ixgbevf_down(adapter); 3492 3493 pci_disable_device(pdev); 3494 3495 /* Request a slot slot reset. */ 3496 return PCI_ERS_RESULT_NEED_RESET; 3497} 3498 3499/** 3500 * ixgbevf_io_slot_reset - called after the pci bus has been reset. 3501 * @pdev: Pointer to PCI device 3502 * 3503 * Restart the card from scratch, as if from a cold-boot. Implementation 3504 * resembles the first-half of the ixgbevf_resume routine. 3505 */ 3506static pci_ers_result_t ixgbevf_io_slot_reset(struct pci_dev *pdev) 3507{ 3508 struct net_device *netdev = pci_get_drvdata(pdev); 3509 struct ixgbevf_adapter *adapter = netdev_priv(netdev); 3510 3511 if (pci_enable_device_mem(pdev)) { 3512 dev_err(&pdev->dev, 3513 "Cannot re-enable PCI device after reset.\n"); 3514 return PCI_ERS_RESULT_DISCONNECT; 3515 } 3516 3517 pci_set_master(pdev); 3518 3519 ixgbevf_reset(adapter); 3520 3521 return PCI_ERS_RESULT_RECOVERED; 3522} 3523 3524/** 3525 * ixgbevf_io_resume - called when traffic can start flowing again. 3526 * @pdev: Pointer to PCI device 3527 * 3528 * This callback is called when the error recovery driver tells us that 3529 * its OK to resume normal operation. Implementation resembles the 3530 * second-half of the ixgbevf_resume routine. 3531 */ 3532static void ixgbevf_io_resume(struct pci_dev *pdev) 3533{ 3534 struct net_device *netdev = pci_get_drvdata(pdev); 3535 struct ixgbevf_adapter *adapter = netdev_priv(netdev); 3536 3537 if (netif_running(netdev)) 3538 ixgbevf_up(adapter); 3539 3540 netif_device_attach(netdev); 3541} 3542 3543/* PCI Error Recovery (ERS) */ 3544static const struct pci_error_handlers ixgbevf_err_handler = { 3545 .error_detected = ixgbevf_io_error_detected, 3546 .slot_reset = ixgbevf_io_slot_reset, 3547 .resume = ixgbevf_io_resume, 3548}; 3549 3550static struct pci_driver ixgbevf_driver = { 3551 .name = ixgbevf_driver_name, 3552 .id_table = ixgbevf_pci_tbl, 3553 .probe = ixgbevf_probe, 3554 .remove = __devexit_p(ixgbevf_remove), 3555#ifdef CONFIG_PM 3556 /* Power Management Hooks */ 3557 .suspend = ixgbevf_suspend, 3558 .resume = ixgbevf_resume, 3559#endif 3560 .shutdown = ixgbevf_shutdown, 3561 .err_handler = &ixgbevf_err_handler 3562}; 3563 3564/** 3565 * ixgbevf_init_module - Driver Registration Routine 3566 * 3567 * ixgbevf_init_module is the first routine called when the driver is 3568 * loaded. All it does is register with the PCI subsystem. 3569 **/ 3570static int __init ixgbevf_init_module(void) 3571{ 3572 int ret; 3573 pr_info("%s - version %s\n", ixgbevf_driver_string, 3574 ixgbevf_driver_version); 3575 3576 pr_info("%s\n", ixgbevf_copyright); 3577 3578 ret = pci_register_driver(&ixgbevf_driver); 3579 return ret; 3580} 3581 3582module_init(ixgbevf_init_module); 3583 3584/** 3585 * ixgbevf_exit_module - Driver Exit Cleanup Routine 3586 * 3587 * ixgbevf_exit_module is called just before the driver is removed 3588 * from memory. 3589 **/ 3590static void __exit ixgbevf_exit_module(void) 3591{ 3592 pci_unregister_driver(&ixgbevf_driver); 3593} 3594 3595#ifdef DEBUG 3596/** 3597 * ixgbevf_get_hw_dev_name - return device name string 3598 * used by hardware layer to print debugging information 3599 **/ 3600char *ixgbevf_get_hw_dev_name(struct ixgbe_hw *hw) 3601{ 3602 struct ixgbevf_adapter *adapter = hw->back; 3603 return adapter->netdev->name; 3604} 3605 3606#endif 3607module_exit(ixgbevf_exit_module); 3608 3609/* ixgbevf_main.c */ 3610