1/* 2 * Linux driver for VMware's vmxnet3 ethernet NIC. 3 * 4 * Copyright (C) 2008-2009, VMware, Inc. All Rights Reserved. 5 * 6 * This program is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License as published by the 8 * Free Software Foundation; version 2 of the License and no later version. 9 * 10 * This program is distributed in the hope that it will be useful, but 11 * WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or 13 * NON INFRINGEMENT. See the GNU General Public License for more 14 * details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * The full GNU General Public License is included in this distribution in 21 * the file called "COPYING". 22 * 23 * Maintained by: Shreyas Bhatewara <pv-drivers@vmware.com> 24 * 25 */ 26 27#include <linux/module.h> 28#include <net/ip6_checksum.h> 29 30#include "vmxnet3_int.h" 31 32char vmxnet3_driver_name[] = "vmxnet3"; 33#define VMXNET3_DRIVER_DESC "VMware vmxnet3 virtual NIC driver" 34 35/* 36 * PCI Device ID Table 37 * Last entry must be all 0s 38 */ 39static const struct pci_device_id vmxnet3_pciid_table[] = { 40 {PCI_VDEVICE(VMWARE, PCI_DEVICE_ID_VMWARE_VMXNET3)}, 41 {0} 42}; 43 44MODULE_DEVICE_TABLE(pci, vmxnet3_pciid_table); 45 46static int enable_mq = 1; 47 48static void 49vmxnet3_write_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac); 50 51/* 52 * Enable/Disable the given intr 53 */ 54static void 55vmxnet3_enable_intr(struct vmxnet3_adapter *adapter, unsigned intr_idx) 56{ 57 VMXNET3_WRITE_BAR0_REG(adapter, VMXNET3_REG_IMR + intr_idx * 8, 0); 58} 59 60 61static void 62vmxnet3_disable_intr(struct vmxnet3_adapter *adapter, unsigned intr_idx) 63{ 64 VMXNET3_WRITE_BAR0_REG(adapter, VMXNET3_REG_IMR + intr_idx * 8, 1); 65} 66 67 68/* 69 * Enable/Disable all intrs used by the device 70 */ 71static void 72vmxnet3_enable_all_intrs(struct vmxnet3_adapter *adapter) 73{ 74 int i; 75 76 for (i = 0; i < adapter->intr.num_intrs; i++) 77 vmxnet3_enable_intr(adapter, i); 78 adapter->shared->devRead.intrConf.intrCtrl &= 79 cpu_to_le32(~VMXNET3_IC_DISABLE_ALL); 80} 81 82 83static void 84vmxnet3_disable_all_intrs(struct vmxnet3_adapter *adapter) 85{ 86 int i; 87 88 adapter->shared->devRead.intrConf.intrCtrl |= 89 cpu_to_le32(VMXNET3_IC_DISABLE_ALL); 90 for (i = 0; i < adapter->intr.num_intrs; i++) 91 vmxnet3_disable_intr(adapter, i); 92} 93 94 95static void 96vmxnet3_ack_events(struct vmxnet3_adapter *adapter, u32 events) 97{ 98 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_ECR, events); 99} 100 101 102static bool 103vmxnet3_tq_stopped(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter) 104{ 105 return tq->stopped; 106} 107 108 109static void 110vmxnet3_tq_start(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter) 111{ 112 tq->stopped = false; 113 netif_start_subqueue(adapter->netdev, tq - adapter->tx_queue); 114} 115 116 117static void 118vmxnet3_tq_wake(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter) 119{ 120 tq->stopped = false; 121 netif_wake_subqueue(adapter->netdev, (tq - adapter->tx_queue)); 122} 123 124 125static void 126vmxnet3_tq_stop(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter) 127{ 128 tq->stopped = true; 129 tq->num_stop++; 130 netif_stop_subqueue(adapter->netdev, (tq - adapter->tx_queue)); 131} 132 133 134/* 135 * Check the link state. This may start or stop the tx queue. 136 */ 137static void 138vmxnet3_check_link(struct vmxnet3_adapter *adapter, bool affectTxQueue) 139{ 140 u32 ret; 141 int i; 142 unsigned long flags; 143 144 spin_lock_irqsave(&adapter->cmd_lock, flags); 145 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_GET_LINK); 146 ret = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD); 147 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 148 149 adapter->link_speed = ret >> 16; 150 if (ret & 1) { /* Link is up. */ 151 netdev_info(adapter->netdev, "NIC Link is Up %d Mbps\n", 152 adapter->link_speed); 153 netif_carrier_on(adapter->netdev); 154 155 if (affectTxQueue) { 156 for (i = 0; i < adapter->num_tx_queues; i++) 157 vmxnet3_tq_start(&adapter->tx_queue[i], 158 adapter); 159 } 160 } else { 161 netdev_info(adapter->netdev, "NIC Link is Down\n"); 162 netif_carrier_off(adapter->netdev); 163 164 if (affectTxQueue) { 165 for (i = 0; i < adapter->num_tx_queues; i++) 166 vmxnet3_tq_stop(&adapter->tx_queue[i], adapter); 167 } 168 } 169} 170 171static void 172vmxnet3_process_events(struct vmxnet3_adapter *adapter) 173{ 174 int i; 175 unsigned long flags; 176 u32 events = le32_to_cpu(adapter->shared->ecr); 177 if (!events) 178 return; 179 180 vmxnet3_ack_events(adapter, events); 181 182 /* Check if link state has changed */ 183 if (events & VMXNET3_ECR_LINK) 184 vmxnet3_check_link(adapter, true); 185 186 /* Check if there is an error on xmit/recv queues */ 187 if (events & (VMXNET3_ECR_TQERR | VMXNET3_ECR_RQERR)) { 188 spin_lock_irqsave(&adapter->cmd_lock, flags); 189 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 190 VMXNET3_CMD_GET_QUEUE_STATUS); 191 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 192 193 for (i = 0; i < adapter->num_tx_queues; i++) 194 if (adapter->tqd_start[i].status.stopped) 195 dev_err(&adapter->netdev->dev, 196 "%s: tq[%d] error 0x%x\n", 197 adapter->netdev->name, i, le32_to_cpu( 198 adapter->tqd_start[i].status.error)); 199 for (i = 0; i < adapter->num_rx_queues; i++) 200 if (adapter->rqd_start[i].status.stopped) 201 dev_err(&adapter->netdev->dev, 202 "%s: rq[%d] error 0x%x\n", 203 adapter->netdev->name, i, 204 adapter->rqd_start[i].status.error); 205 206 schedule_work(&adapter->work); 207 } 208} 209 210#ifdef __BIG_ENDIAN_BITFIELD 211/* 212 * The device expects the bitfields in shared structures to be written in 213 * little endian. When CPU is big endian, the following routines are used to 214 * correctly read and write into ABI. 215 * The general technique used here is : double word bitfields are defined in 216 * opposite order for big endian architecture. Then before reading them in 217 * driver the complete double word is translated using le32_to_cpu. Similarly 218 * After the driver writes into bitfields, cpu_to_le32 is used to translate the 219 * double words into required format. 220 * In order to avoid touching bits in shared structure more than once, temporary 221 * descriptors are used. These are passed as srcDesc to following functions. 222 */ 223static void vmxnet3_RxDescToCPU(const struct Vmxnet3_RxDesc *srcDesc, 224 struct Vmxnet3_RxDesc *dstDesc) 225{ 226 u32 *src = (u32 *)srcDesc + 2; 227 u32 *dst = (u32 *)dstDesc + 2; 228 dstDesc->addr = le64_to_cpu(srcDesc->addr); 229 *dst = le32_to_cpu(*src); 230 dstDesc->ext1 = le32_to_cpu(srcDesc->ext1); 231} 232 233static void vmxnet3_TxDescToLe(const struct Vmxnet3_TxDesc *srcDesc, 234 struct Vmxnet3_TxDesc *dstDesc) 235{ 236 int i; 237 u32 *src = (u32 *)(srcDesc + 1); 238 u32 *dst = (u32 *)(dstDesc + 1); 239 240 /* Working backwards so that the gen bit is set at the end. */ 241 for (i = 2; i > 0; i--) { 242 src--; 243 dst--; 244 *dst = cpu_to_le32(*src); 245 } 246} 247 248 249static void vmxnet3_RxCompToCPU(const struct Vmxnet3_RxCompDesc *srcDesc, 250 struct Vmxnet3_RxCompDesc *dstDesc) 251{ 252 int i = 0; 253 u32 *src = (u32 *)srcDesc; 254 u32 *dst = (u32 *)dstDesc; 255 for (i = 0; i < sizeof(struct Vmxnet3_RxCompDesc) / sizeof(u32); i++) { 256 *dst = le32_to_cpu(*src); 257 src++; 258 dst++; 259 } 260} 261 262 263/* Used to read bitfield values from double words. */ 264static u32 get_bitfield32(const __le32 *bitfield, u32 pos, u32 size) 265{ 266 u32 temp = le32_to_cpu(*bitfield); 267 u32 mask = ((1 << size) - 1) << pos; 268 temp &= mask; 269 temp >>= pos; 270 return temp; 271} 272 273 274 275#endif /* __BIG_ENDIAN_BITFIELD */ 276 277#ifdef __BIG_ENDIAN_BITFIELD 278 279# define VMXNET3_TXDESC_GET_GEN(txdesc) get_bitfield32(((const __le32 *) \ 280 txdesc) + VMXNET3_TXD_GEN_DWORD_SHIFT, \ 281 VMXNET3_TXD_GEN_SHIFT, VMXNET3_TXD_GEN_SIZE) 282# define VMXNET3_TXDESC_GET_EOP(txdesc) get_bitfield32(((const __le32 *) \ 283 txdesc) + VMXNET3_TXD_EOP_DWORD_SHIFT, \ 284 VMXNET3_TXD_EOP_SHIFT, VMXNET3_TXD_EOP_SIZE) 285# define VMXNET3_TCD_GET_GEN(tcd) get_bitfield32(((const __le32 *)tcd) + \ 286 VMXNET3_TCD_GEN_DWORD_SHIFT, VMXNET3_TCD_GEN_SHIFT, \ 287 VMXNET3_TCD_GEN_SIZE) 288# define VMXNET3_TCD_GET_TXIDX(tcd) get_bitfield32((const __le32 *)tcd, \ 289 VMXNET3_TCD_TXIDX_SHIFT, VMXNET3_TCD_TXIDX_SIZE) 290# define vmxnet3_getRxComp(dstrcd, rcd, tmp) do { \ 291 (dstrcd) = (tmp); \ 292 vmxnet3_RxCompToCPU((rcd), (tmp)); \ 293 } while (0) 294# define vmxnet3_getRxDesc(dstrxd, rxd, tmp) do { \ 295 (dstrxd) = (tmp); \ 296 vmxnet3_RxDescToCPU((rxd), (tmp)); \ 297 } while (0) 298 299#else 300 301# define VMXNET3_TXDESC_GET_GEN(txdesc) ((txdesc)->gen) 302# define VMXNET3_TXDESC_GET_EOP(txdesc) ((txdesc)->eop) 303# define VMXNET3_TCD_GET_GEN(tcd) ((tcd)->gen) 304# define VMXNET3_TCD_GET_TXIDX(tcd) ((tcd)->txdIdx) 305# define vmxnet3_getRxComp(dstrcd, rcd, tmp) (dstrcd) = (rcd) 306# define vmxnet3_getRxDesc(dstrxd, rxd, tmp) (dstrxd) = (rxd) 307 308#endif /* __BIG_ENDIAN_BITFIELD */ 309 310 311static void 312vmxnet3_unmap_tx_buf(struct vmxnet3_tx_buf_info *tbi, 313 struct pci_dev *pdev) 314{ 315 if (tbi->map_type == VMXNET3_MAP_SINGLE) 316 dma_unmap_single(&pdev->dev, tbi->dma_addr, tbi->len, 317 PCI_DMA_TODEVICE); 318 else if (tbi->map_type == VMXNET3_MAP_PAGE) 319 dma_unmap_page(&pdev->dev, tbi->dma_addr, tbi->len, 320 PCI_DMA_TODEVICE); 321 else 322 BUG_ON(tbi->map_type != VMXNET3_MAP_NONE); 323 324 tbi->map_type = VMXNET3_MAP_NONE; /* to help debugging */ 325} 326 327 328static int 329vmxnet3_unmap_pkt(u32 eop_idx, struct vmxnet3_tx_queue *tq, 330 struct pci_dev *pdev, struct vmxnet3_adapter *adapter) 331{ 332 struct sk_buff *skb; 333 int entries = 0; 334 335 /* no out of order completion */ 336 BUG_ON(tq->buf_info[eop_idx].sop_idx != tq->tx_ring.next2comp); 337 BUG_ON(VMXNET3_TXDESC_GET_EOP(&(tq->tx_ring.base[eop_idx].txd)) != 1); 338 339 skb = tq->buf_info[eop_idx].skb; 340 BUG_ON(skb == NULL); 341 tq->buf_info[eop_idx].skb = NULL; 342 343 VMXNET3_INC_RING_IDX_ONLY(eop_idx, tq->tx_ring.size); 344 345 while (tq->tx_ring.next2comp != eop_idx) { 346 vmxnet3_unmap_tx_buf(tq->buf_info + tq->tx_ring.next2comp, 347 pdev); 348 349 /* update next2comp w/o tx_lock. Since we are marking more, 350 * instead of less, tx ring entries avail, the worst case is 351 * that the tx routine incorrectly re-queues a pkt due to 352 * insufficient tx ring entries. 353 */ 354 vmxnet3_cmd_ring_adv_next2comp(&tq->tx_ring); 355 entries++; 356 } 357 358 dev_kfree_skb_any(skb); 359 return entries; 360} 361 362 363static int 364vmxnet3_tq_tx_complete(struct vmxnet3_tx_queue *tq, 365 struct vmxnet3_adapter *adapter) 366{ 367 int completed = 0; 368 union Vmxnet3_GenericDesc *gdesc; 369 370 gdesc = tq->comp_ring.base + tq->comp_ring.next2proc; 371 while (VMXNET3_TCD_GET_GEN(&gdesc->tcd) == tq->comp_ring.gen) { 372 completed += vmxnet3_unmap_pkt(VMXNET3_TCD_GET_TXIDX( 373 &gdesc->tcd), tq, adapter->pdev, 374 adapter); 375 376 vmxnet3_comp_ring_adv_next2proc(&tq->comp_ring); 377 gdesc = tq->comp_ring.base + tq->comp_ring.next2proc; 378 } 379 380 if (completed) { 381 spin_lock(&tq->tx_lock); 382 if (unlikely(vmxnet3_tq_stopped(tq, adapter) && 383 vmxnet3_cmd_ring_desc_avail(&tq->tx_ring) > 384 VMXNET3_WAKE_QUEUE_THRESHOLD(tq) && 385 netif_carrier_ok(adapter->netdev))) { 386 vmxnet3_tq_wake(tq, adapter); 387 } 388 spin_unlock(&tq->tx_lock); 389 } 390 return completed; 391} 392 393 394static void 395vmxnet3_tq_cleanup(struct vmxnet3_tx_queue *tq, 396 struct vmxnet3_adapter *adapter) 397{ 398 int i; 399 400 while (tq->tx_ring.next2comp != tq->tx_ring.next2fill) { 401 struct vmxnet3_tx_buf_info *tbi; 402 403 tbi = tq->buf_info + tq->tx_ring.next2comp; 404 405 vmxnet3_unmap_tx_buf(tbi, adapter->pdev); 406 if (tbi->skb) { 407 dev_kfree_skb_any(tbi->skb); 408 tbi->skb = NULL; 409 } 410 vmxnet3_cmd_ring_adv_next2comp(&tq->tx_ring); 411 } 412 413 /* sanity check, verify all buffers are indeed unmapped and freed */ 414 for (i = 0; i < tq->tx_ring.size; i++) { 415 BUG_ON(tq->buf_info[i].skb != NULL || 416 tq->buf_info[i].map_type != VMXNET3_MAP_NONE); 417 } 418 419 tq->tx_ring.gen = VMXNET3_INIT_GEN; 420 tq->tx_ring.next2fill = tq->tx_ring.next2comp = 0; 421 422 tq->comp_ring.gen = VMXNET3_INIT_GEN; 423 tq->comp_ring.next2proc = 0; 424} 425 426 427static void 428vmxnet3_tq_destroy(struct vmxnet3_tx_queue *tq, 429 struct vmxnet3_adapter *adapter) 430{ 431 if (tq->tx_ring.base) { 432 dma_free_coherent(&adapter->pdev->dev, tq->tx_ring.size * 433 sizeof(struct Vmxnet3_TxDesc), 434 tq->tx_ring.base, tq->tx_ring.basePA); 435 tq->tx_ring.base = NULL; 436 } 437 if (tq->data_ring.base) { 438 dma_free_coherent(&adapter->pdev->dev, tq->data_ring.size * 439 sizeof(struct Vmxnet3_TxDataDesc), 440 tq->data_ring.base, tq->data_ring.basePA); 441 tq->data_ring.base = NULL; 442 } 443 if (tq->comp_ring.base) { 444 dma_free_coherent(&adapter->pdev->dev, tq->comp_ring.size * 445 sizeof(struct Vmxnet3_TxCompDesc), 446 tq->comp_ring.base, tq->comp_ring.basePA); 447 tq->comp_ring.base = NULL; 448 } 449 if (tq->buf_info) { 450 dma_free_coherent(&adapter->pdev->dev, 451 tq->tx_ring.size * sizeof(tq->buf_info[0]), 452 tq->buf_info, tq->buf_info_pa); 453 tq->buf_info = NULL; 454 } 455} 456 457 458/* Destroy all tx queues */ 459void 460vmxnet3_tq_destroy_all(struct vmxnet3_adapter *adapter) 461{ 462 int i; 463 464 for (i = 0; i < adapter->num_tx_queues; i++) 465 vmxnet3_tq_destroy(&adapter->tx_queue[i], adapter); 466} 467 468 469static void 470vmxnet3_tq_init(struct vmxnet3_tx_queue *tq, 471 struct vmxnet3_adapter *adapter) 472{ 473 int i; 474 475 /* reset the tx ring contents to 0 and reset the tx ring states */ 476 memset(tq->tx_ring.base, 0, tq->tx_ring.size * 477 sizeof(struct Vmxnet3_TxDesc)); 478 tq->tx_ring.next2fill = tq->tx_ring.next2comp = 0; 479 tq->tx_ring.gen = VMXNET3_INIT_GEN; 480 481 memset(tq->data_ring.base, 0, tq->data_ring.size * 482 sizeof(struct Vmxnet3_TxDataDesc)); 483 484 /* reset the tx comp ring contents to 0 and reset comp ring states */ 485 memset(tq->comp_ring.base, 0, tq->comp_ring.size * 486 sizeof(struct Vmxnet3_TxCompDesc)); 487 tq->comp_ring.next2proc = 0; 488 tq->comp_ring.gen = VMXNET3_INIT_GEN; 489 490 /* reset the bookkeeping data */ 491 memset(tq->buf_info, 0, sizeof(tq->buf_info[0]) * tq->tx_ring.size); 492 for (i = 0; i < tq->tx_ring.size; i++) 493 tq->buf_info[i].map_type = VMXNET3_MAP_NONE; 494 495 /* stats are not reset */ 496} 497 498 499static int 500vmxnet3_tq_create(struct vmxnet3_tx_queue *tq, 501 struct vmxnet3_adapter *adapter) 502{ 503 size_t sz; 504 505 BUG_ON(tq->tx_ring.base || tq->data_ring.base || 506 tq->comp_ring.base || tq->buf_info); 507 508 tq->tx_ring.base = dma_alloc_coherent(&adapter->pdev->dev, 509 tq->tx_ring.size * sizeof(struct Vmxnet3_TxDesc), 510 &tq->tx_ring.basePA, GFP_KERNEL); 511 if (!tq->tx_ring.base) { 512 netdev_err(adapter->netdev, "failed to allocate tx ring\n"); 513 goto err; 514 } 515 516 tq->data_ring.base = dma_alloc_coherent(&adapter->pdev->dev, 517 tq->data_ring.size * sizeof(struct Vmxnet3_TxDataDesc), 518 &tq->data_ring.basePA, GFP_KERNEL); 519 if (!tq->data_ring.base) { 520 netdev_err(adapter->netdev, "failed to allocate data ring\n"); 521 goto err; 522 } 523 524 tq->comp_ring.base = dma_alloc_coherent(&adapter->pdev->dev, 525 tq->comp_ring.size * sizeof(struct Vmxnet3_TxCompDesc), 526 &tq->comp_ring.basePA, GFP_KERNEL); 527 if (!tq->comp_ring.base) { 528 netdev_err(adapter->netdev, "failed to allocate tx comp ring\n"); 529 goto err; 530 } 531 532 sz = tq->tx_ring.size * sizeof(tq->buf_info[0]); 533 tq->buf_info = dma_zalloc_coherent(&adapter->pdev->dev, sz, 534 &tq->buf_info_pa, GFP_KERNEL); 535 if (!tq->buf_info) 536 goto err; 537 538 return 0; 539 540err: 541 vmxnet3_tq_destroy(tq, adapter); 542 return -ENOMEM; 543} 544 545static void 546vmxnet3_tq_cleanup_all(struct vmxnet3_adapter *adapter) 547{ 548 int i; 549 550 for (i = 0; i < adapter->num_tx_queues; i++) 551 vmxnet3_tq_cleanup(&adapter->tx_queue[i], adapter); 552} 553 554/* 555 * starting from ring->next2fill, allocate rx buffers for the given ring 556 * of the rx queue and update the rx desc. stop after @num_to_alloc buffers 557 * are allocated or allocation fails 558 */ 559 560static int 561vmxnet3_rq_alloc_rx_buf(struct vmxnet3_rx_queue *rq, u32 ring_idx, 562 int num_to_alloc, struct vmxnet3_adapter *adapter) 563{ 564 int num_allocated = 0; 565 struct vmxnet3_rx_buf_info *rbi_base = rq->buf_info[ring_idx]; 566 struct vmxnet3_cmd_ring *ring = &rq->rx_ring[ring_idx]; 567 u32 val; 568 569 while (num_allocated <= num_to_alloc) { 570 struct vmxnet3_rx_buf_info *rbi; 571 union Vmxnet3_GenericDesc *gd; 572 573 rbi = rbi_base + ring->next2fill; 574 gd = ring->base + ring->next2fill; 575 576 if (rbi->buf_type == VMXNET3_RX_BUF_SKB) { 577 if (rbi->skb == NULL) { 578 rbi->skb = __netdev_alloc_skb_ip_align(adapter->netdev, 579 rbi->len, 580 GFP_KERNEL); 581 if (unlikely(rbi->skb == NULL)) { 582 rq->stats.rx_buf_alloc_failure++; 583 break; 584 } 585 586 rbi->dma_addr = dma_map_single( 587 &adapter->pdev->dev, 588 rbi->skb->data, rbi->len, 589 PCI_DMA_FROMDEVICE); 590 if (dma_mapping_error(&adapter->pdev->dev, 591 rbi->dma_addr)) { 592 dev_kfree_skb_any(rbi->skb); 593 rq->stats.rx_buf_alloc_failure++; 594 break; 595 } 596 } else { 597 /* rx buffer skipped by the device */ 598 } 599 val = VMXNET3_RXD_BTYPE_HEAD << VMXNET3_RXD_BTYPE_SHIFT; 600 } else { 601 BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_PAGE || 602 rbi->len != PAGE_SIZE); 603 604 if (rbi->page == NULL) { 605 rbi->page = alloc_page(GFP_ATOMIC); 606 if (unlikely(rbi->page == NULL)) { 607 rq->stats.rx_buf_alloc_failure++; 608 break; 609 } 610 rbi->dma_addr = dma_map_page( 611 &adapter->pdev->dev, 612 rbi->page, 0, PAGE_SIZE, 613 PCI_DMA_FROMDEVICE); 614 if (dma_mapping_error(&adapter->pdev->dev, 615 rbi->dma_addr)) { 616 put_page(rbi->page); 617 rq->stats.rx_buf_alloc_failure++; 618 break; 619 } 620 } else { 621 /* rx buffers skipped by the device */ 622 } 623 val = VMXNET3_RXD_BTYPE_BODY << VMXNET3_RXD_BTYPE_SHIFT; 624 } 625 626 gd->rxd.addr = cpu_to_le64(rbi->dma_addr); 627 gd->dword[2] = cpu_to_le32((!ring->gen << VMXNET3_RXD_GEN_SHIFT) 628 | val | rbi->len); 629 630 /* Fill the last buffer but dont mark it ready, or else the 631 * device will think that the queue is full */ 632 if (num_allocated == num_to_alloc) 633 break; 634 635 gd->dword[2] |= cpu_to_le32(ring->gen << VMXNET3_RXD_GEN_SHIFT); 636 num_allocated++; 637 vmxnet3_cmd_ring_adv_next2fill(ring); 638 } 639 640 netdev_dbg(adapter->netdev, 641 "alloc_rx_buf: %d allocated, next2fill %u, next2comp %u\n", 642 num_allocated, ring->next2fill, ring->next2comp); 643 644 /* so that the device can distinguish a full ring and an empty ring */ 645 BUG_ON(num_allocated != 0 && ring->next2fill == ring->next2comp); 646 647 return num_allocated; 648} 649 650 651static void 652vmxnet3_append_frag(struct sk_buff *skb, struct Vmxnet3_RxCompDesc *rcd, 653 struct vmxnet3_rx_buf_info *rbi) 654{ 655 struct skb_frag_struct *frag = skb_shinfo(skb)->frags + 656 skb_shinfo(skb)->nr_frags; 657 658 BUG_ON(skb_shinfo(skb)->nr_frags >= MAX_SKB_FRAGS); 659 660 __skb_frag_set_page(frag, rbi->page); 661 frag->page_offset = 0; 662 skb_frag_size_set(frag, rcd->len); 663 skb->data_len += rcd->len; 664 skb->truesize += PAGE_SIZE; 665 skb_shinfo(skb)->nr_frags++; 666} 667 668 669static int 670vmxnet3_map_pkt(struct sk_buff *skb, struct vmxnet3_tx_ctx *ctx, 671 struct vmxnet3_tx_queue *tq, struct pci_dev *pdev, 672 struct vmxnet3_adapter *adapter) 673{ 674 u32 dw2, len; 675 unsigned long buf_offset; 676 int i; 677 union Vmxnet3_GenericDesc *gdesc; 678 struct vmxnet3_tx_buf_info *tbi = NULL; 679 680 BUG_ON(ctx->copy_size > skb_headlen(skb)); 681 682 /* use the previous gen bit for the SOP desc */ 683 dw2 = (tq->tx_ring.gen ^ 0x1) << VMXNET3_TXD_GEN_SHIFT; 684 685 ctx->sop_txd = tq->tx_ring.base + tq->tx_ring.next2fill; 686 gdesc = ctx->sop_txd; /* both loops below can be skipped */ 687 688 /* no need to map the buffer if headers are copied */ 689 if (ctx->copy_size) { 690 ctx->sop_txd->txd.addr = cpu_to_le64(tq->data_ring.basePA + 691 tq->tx_ring.next2fill * 692 sizeof(struct Vmxnet3_TxDataDesc)); 693 ctx->sop_txd->dword[2] = cpu_to_le32(dw2 | ctx->copy_size); 694 ctx->sop_txd->dword[3] = 0; 695 696 tbi = tq->buf_info + tq->tx_ring.next2fill; 697 tbi->map_type = VMXNET3_MAP_NONE; 698 699 netdev_dbg(adapter->netdev, 700 "txd[%u]: 0x%Lx 0x%x 0x%x\n", 701 tq->tx_ring.next2fill, 702 le64_to_cpu(ctx->sop_txd->txd.addr), 703 ctx->sop_txd->dword[2], ctx->sop_txd->dword[3]); 704 vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring); 705 706 /* use the right gen for non-SOP desc */ 707 dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT; 708 } 709 710 /* linear part can use multiple tx desc if it's big */ 711 len = skb_headlen(skb) - ctx->copy_size; 712 buf_offset = ctx->copy_size; 713 while (len) { 714 u32 buf_size; 715 716 if (len < VMXNET3_MAX_TX_BUF_SIZE) { 717 buf_size = len; 718 dw2 |= len; 719 } else { 720 buf_size = VMXNET3_MAX_TX_BUF_SIZE; 721 /* spec says that for TxDesc.len, 0 == 2^14 */ 722 } 723 724 tbi = tq->buf_info + tq->tx_ring.next2fill; 725 tbi->map_type = VMXNET3_MAP_SINGLE; 726 tbi->dma_addr = dma_map_single(&adapter->pdev->dev, 727 skb->data + buf_offset, buf_size, 728 PCI_DMA_TODEVICE); 729 if (dma_mapping_error(&adapter->pdev->dev, tbi->dma_addr)) 730 return -EFAULT; 731 732 tbi->len = buf_size; 733 734 gdesc = tq->tx_ring.base + tq->tx_ring.next2fill; 735 BUG_ON(gdesc->txd.gen == tq->tx_ring.gen); 736 737 gdesc->txd.addr = cpu_to_le64(tbi->dma_addr); 738 gdesc->dword[2] = cpu_to_le32(dw2); 739 gdesc->dword[3] = 0; 740 741 netdev_dbg(adapter->netdev, 742 "txd[%u]: 0x%Lx 0x%x 0x%x\n", 743 tq->tx_ring.next2fill, le64_to_cpu(gdesc->txd.addr), 744 le32_to_cpu(gdesc->dword[2]), gdesc->dword[3]); 745 vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring); 746 dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT; 747 748 len -= buf_size; 749 buf_offset += buf_size; 750 } 751 752 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 753 const struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i]; 754 u32 buf_size; 755 756 buf_offset = 0; 757 len = skb_frag_size(frag); 758 while (len) { 759 tbi = tq->buf_info + tq->tx_ring.next2fill; 760 if (len < VMXNET3_MAX_TX_BUF_SIZE) { 761 buf_size = len; 762 dw2 |= len; 763 } else { 764 buf_size = VMXNET3_MAX_TX_BUF_SIZE; 765 /* spec says that for TxDesc.len, 0 == 2^14 */ 766 } 767 tbi->map_type = VMXNET3_MAP_PAGE; 768 tbi->dma_addr = skb_frag_dma_map(&adapter->pdev->dev, frag, 769 buf_offset, buf_size, 770 DMA_TO_DEVICE); 771 if (dma_mapping_error(&adapter->pdev->dev, tbi->dma_addr)) 772 return -EFAULT; 773 774 tbi->len = buf_size; 775 776 gdesc = tq->tx_ring.base + tq->tx_ring.next2fill; 777 BUG_ON(gdesc->txd.gen == tq->tx_ring.gen); 778 779 gdesc->txd.addr = cpu_to_le64(tbi->dma_addr); 780 gdesc->dword[2] = cpu_to_le32(dw2); 781 gdesc->dword[3] = 0; 782 783 netdev_dbg(adapter->netdev, 784 "txd[%u]: 0x%llx %u %u\n", 785 tq->tx_ring.next2fill, le64_to_cpu(gdesc->txd.addr), 786 le32_to_cpu(gdesc->dword[2]), gdesc->dword[3]); 787 vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring); 788 dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT; 789 790 len -= buf_size; 791 buf_offset += buf_size; 792 } 793 } 794 795 ctx->eop_txd = gdesc; 796 797 /* set the last buf_info for the pkt */ 798 tbi->skb = skb; 799 tbi->sop_idx = ctx->sop_txd - tq->tx_ring.base; 800 801 return 0; 802} 803 804 805/* Init all tx queues */ 806static void 807vmxnet3_tq_init_all(struct vmxnet3_adapter *adapter) 808{ 809 int i; 810 811 for (i = 0; i < adapter->num_tx_queues; i++) 812 vmxnet3_tq_init(&adapter->tx_queue[i], adapter); 813} 814 815 816/* 817 * parse and copy relevant protocol headers: 818 * For a tso pkt, relevant headers are L2/3/4 including options 819 * For a pkt requesting csum offloading, they are L2/3 and may include L4 820 * if it's a TCP/UDP pkt 821 * 822 * Returns: 823 * -1: error happens during parsing 824 * 0: protocol headers parsed, but too big to be copied 825 * 1: protocol headers parsed and copied 826 * 827 * Other effects: 828 * 1. related *ctx fields are updated. 829 * 2. ctx->copy_size is # of bytes copied 830 * 3. the portion copied is guaranteed to be in the linear part 831 * 832 */ 833static int 834vmxnet3_parse_and_copy_hdr(struct sk_buff *skb, struct vmxnet3_tx_queue *tq, 835 struct vmxnet3_tx_ctx *ctx, 836 struct vmxnet3_adapter *adapter) 837{ 838 struct Vmxnet3_TxDataDesc *tdd; 839 u8 protocol = 0; 840 841 if (ctx->mss) { /* TSO */ 842 ctx->eth_ip_hdr_size = skb_transport_offset(skb); 843 ctx->l4_hdr_size = tcp_hdrlen(skb); 844 ctx->copy_size = ctx->eth_ip_hdr_size + ctx->l4_hdr_size; 845 } else { 846 if (skb->ip_summed == CHECKSUM_PARTIAL) { 847 ctx->eth_ip_hdr_size = skb_checksum_start_offset(skb); 848 849 if (ctx->ipv4) { 850 const struct iphdr *iph = ip_hdr(skb); 851 852 protocol = iph->protocol; 853 } else if (ctx->ipv6) { 854 const struct ipv6hdr *ipv6h = ipv6_hdr(skb); 855 856 protocol = ipv6h->nexthdr; 857 } 858 859 switch (protocol) { 860 case IPPROTO_TCP: 861 ctx->l4_hdr_size = tcp_hdrlen(skb); 862 break; 863 case IPPROTO_UDP: 864 ctx->l4_hdr_size = sizeof(struct udphdr); 865 break; 866 default: 867 ctx->l4_hdr_size = 0; 868 break; 869 } 870 871 ctx->copy_size = min(ctx->eth_ip_hdr_size + 872 ctx->l4_hdr_size, skb->len); 873 } else { 874 ctx->eth_ip_hdr_size = 0; 875 ctx->l4_hdr_size = 0; 876 /* copy as much as allowed */ 877 ctx->copy_size = min((unsigned int)VMXNET3_HDR_COPY_SIZE 878 , skb_headlen(skb)); 879 } 880 881 if (skb->len <= VMXNET3_HDR_COPY_SIZE) 882 ctx->copy_size = skb->len; 883 884 /* make sure headers are accessible directly */ 885 if (unlikely(!pskb_may_pull(skb, ctx->copy_size))) 886 goto err; 887 } 888 889 if (unlikely(ctx->copy_size > VMXNET3_HDR_COPY_SIZE)) { 890 tq->stats.oversized_hdr++; 891 ctx->copy_size = 0; 892 return 0; 893 } 894 895 tdd = tq->data_ring.base + tq->tx_ring.next2fill; 896 897 memcpy(tdd->data, skb->data, ctx->copy_size); 898 netdev_dbg(adapter->netdev, 899 "copy %u bytes to dataRing[%u]\n", 900 ctx->copy_size, tq->tx_ring.next2fill); 901 return 1; 902 903err: 904 return -1; 905} 906 907 908static void 909vmxnet3_prepare_tso(struct sk_buff *skb, 910 struct vmxnet3_tx_ctx *ctx) 911{ 912 struct tcphdr *tcph = tcp_hdr(skb); 913 914 if (ctx->ipv4) { 915 struct iphdr *iph = ip_hdr(skb); 916 917 iph->check = 0; 918 tcph->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr, 0, 919 IPPROTO_TCP, 0); 920 } else if (ctx->ipv6) { 921 struct ipv6hdr *iph = ipv6_hdr(skb); 922 923 tcph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, 0, 924 IPPROTO_TCP, 0); 925 } 926} 927 928static int txd_estimate(const struct sk_buff *skb) 929{ 930 int count = VMXNET3_TXD_NEEDED(skb_headlen(skb)) + 1; 931 int i; 932 933 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 934 const struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i]; 935 936 count += VMXNET3_TXD_NEEDED(skb_frag_size(frag)); 937 } 938 return count; 939} 940 941/* 942 * Transmits a pkt thru a given tq 943 * Returns: 944 * NETDEV_TX_OK: descriptors are setup successfully 945 * NETDEV_TX_OK: error occurred, the pkt is dropped 946 * NETDEV_TX_BUSY: tx ring is full, queue is stopped 947 * 948 * Side-effects: 949 * 1. tx ring may be changed 950 * 2. tq stats may be updated accordingly 951 * 3. shared->txNumDeferred may be updated 952 */ 953 954static int 955vmxnet3_tq_xmit(struct sk_buff *skb, struct vmxnet3_tx_queue *tq, 956 struct vmxnet3_adapter *adapter, struct net_device *netdev) 957{ 958 int ret; 959 u32 count; 960 unsigned long flags; 961 struct vmxnet3_tx_ctx ctx; 962 union Vmxnet3_GenericDesc *gdesc; 963#ifdef __BIG_ENDIAN_BITFIELD 964 /* Use temporary descriptor to avoid touching bits multiple times */ 965 union Vmxnet3_GenericDesc tempTxDesc; 966#endif 967 968 count = txd_estimate(skb); 969 970 ctx.ipv4 = (vlan_get_protocol(skb) == cpu_to_be16(ETH_P_IP)); 971 ctx.ipv6 = (vlan_get_protocol(skb) == cpu_to_be16(ETH_P_IPV6)); 972 973 ctx.mss = skb_shinfo(skb)->gso_size; 974 if (ctx.mss) { 975 if (skb_header_cloned(skb)) { 976 if (unlikely(pskb_expand_head(skb, 0, 0, 977 GFP_ATOMIC) != 0)) { 978 tq->stats.drop_tso++; 979 goto drop_pkt; 980 } 981 tq->stats.copy_skb_header++; 982 } 983 vmxnet3_prepare_tso(skb, &ctx); 984 } else { 985 if (unlikely(count > VMXNET3_MAX_TXD_PER_PKT)) { 986 987 /* non-tso pkts must not use more than 988 * VMXNET3_MAX_TXD_PER_PKT entries 989 */ 990 if (skb_linearize(skb) != 0) { 991 tq->stats.drop_too_many_frags++; 992 goto drop_pkt; 993 } 994 tq->stats.linearized++; 995 996 /* recalculate the # of descriptors to use */ 997 count = VMXNET3_TXD_NEEDED(skb_headlen(skb)) + 1; 998 } 999 } 1000 1001 spin_lock_irqsave(&tq->tx_lock, flags); 1002 1003 if (count > vmxnet3_cmd_ring_desc_avail(&tq->tx_ring)) { 1004 tq->stats.tx_ring_full++; 1005 netdev_dbg(adapter->netdev, 1006 "tx queue stopped on %s, next2comp %u" 1007 " next2fill %u\n", adapter->netdev->name, 1008 tq->tx_ring.next2comp, tq->tx_ring.next2fill); 1009 1010 vmxnet3_tq_stop(tq, adapter); 1011 spin_unlock_irqrestore(&tq->tx_lock, flags); 1012 return NETDEV_TX_BUSY; 1013 } 1014 1015 1016 ret = vmxnet3_parse_and_copy_hdr(skb, tq, &ctx, adapter); 1017 if (ret >= 0) { 1018 BUG_ON(ret <= 0 && ctx.copy_size != 0); 1019 /* hdrs parsed, check against other limits */ 1020 if (ctx.mss) { 1021 if (unlikely(ctx.eth_ip_hdr_size + ctx.l4_hdr_size > 1022 VMXNET3_MAX_TX_BUF_SIZE)) { 1023 goto hdr_too_big; 1024 } 1025 } else { 1026 if (skb->ip_summed == CHECKSUM_PARTIAL) { 1027 if (unlikely(ctx.eth_ip_hdr_size + 1028 skb->csum_offset > 1029 VMXNET3_MAX_CSUM_OFFSET)) { 1030 goto hdr_too_big; 1031 } 1032 } 1033 } 1034 } else { 1035 tq->stats.drop_hdr_inspect_err++; 1036 goto unlock_drop_pkt; 1037 } 1038 1039 /* fill tx descs related to addr & len */ 1040 if (vmxnet3_map_pkt(skb, &ctx, tq, adapter->pdev, adapter)) 1041 goto unlock_drop_pkt; 1042 1043 /* setup the EOP desc */ 1044 ctx.eop_txd->dword[3] = cpu_to_le32(VMXNET3_TXD_CQ | VMXNET3_TXD_EOP); 1045 1046 /* setup the SOP desc */ 1047#ifdef __BIG_ENDIAN_BITFIELD 1048 gdesc = &tempTxDesc; 1049 gdesc->dword[2] = ctx.sop_txd->dword[2]; 1050 gdesc->dword[3] = ctx.sop_txd->dword[3]; 1051#else 1052 gdesc = ctx.sop_txd; 1053#endif 1054 if (ctx.mss) { 1055 gdesc->txd.hlen = ctx.eth_ip_hdr_size + ctx.l4_hdr_size; 1056 gdesc->txd.om = VMXNET3_OM_TSO; 1057 gdesc->txd.msscof = ctx.mss; 1058 le32_add_cpu(&tq->shared->txNumDeferred, (skb->len - 1059 gdesc->txd.hlen + ctx.mss - 1) / ctx.mss); 1060 } else { 1061 if (skb->ip_summed == CHECKSUM_PARTIAL) { 1062 gdesc->txd.hlen = ctx.eth_ip_hdr_size; 1063 gdesc->txd.om = VMXNET3_OM_CSUM; 1064 gdesc->txd.msscof = ctx.eth_ip_hdr_size + 1065 skb->csum_offset; 1066 } else { 1067 gdesc->txd.om = 0; 1068 gdesc->txd.msscof = 0; 1069 } 1070 le32_add_cpu(&tq->shared->txNumDeferred, 1); 1071 } 1072 1073 if (skb_vlan_tag_present(skb)) { 1074 gdesc->txd.ti = 1; 1075 gdesc->txd.tci = skb_vlan_tag_get(skb); 1076 } 1077 1078 /* finally flips the GEN bit of the SOP desc. */ 1079 gdesc->dword[2] = cpu_to_le32(le32_to_cpu(gdesc->dword[2]) ^ 1080 VMXNET3_TXD_GEN); 1081#ifdef __BIG_ENDIAN_BITFIELD 1082 /* Finished updating in bitfields of Tx Desc, so write them in original 1083 * place. 1084 */ 1085 vmxnet3_TxDescToLe((struct Vmxnet3_TxDesc *)gdesc, 1086 (struct Vmxnet3_TxDesc *)ctx.sop_txd); 1087 gdesc = ctx.sop_txd; 1088#endif 1089 netdev_dbg(adapter->netdev, 1090 "txd[%u]: SOP 0x%Lx 0x%x 0x%x\n", 1091 (u32)(ctx.sop_txd - 1092 tq->tx_ring.base), le64_to_cpu(gdesc->txd.addr), 1093 le32_to_cpu(gdesc->dword[2]), le32_to_cpu(gdesc->dword[3])); 1094 1095 spin_unlock_irqrestore(&tq->tx_lock, flags); 1096 1097 if (le32_to_cpu(tq->shared->txNumDeferred) >= 1098 le32_to_cpu(tq->shared->txThreshold)) { 1099 tq->shared->txNumDeferred = 0; 1100 VMXNET3_WRITE_BAR0_REG(adapter, 1101 VMXNET3_REG_TXPROD + tq->qid * 8, 1102 tq->tx_ring.next2fill); 1103 } 1104 1105 return NETDEV_TX_OK; 1106 1107hdr_too_big: 1108 tq->stats.drop_oversized_hdr++; 1109unlock_drop_pkt: 1110 spin_unlock_irqrestore(&tq->tx_lock, flags); 1111drop_pkt: 1112 tq->stats.drop_total++; 1113 dev_kfree_skb_any(skb); 1114 return NETDEV_TX_OK; 1115} 1116 1117 1118static netdev_tx_t 1119vmxnet3_xmit_frame(struct sk_buff *skb, struct net_device *netdev) 1120{ 1121 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 1122 1123 BUG_ON(skb->queue_mapping > adapter->num_tx_queues); 1124 return vmxnet3_tq_xmit(skb, 1125 &adapter->tx_queue[skb->queue_mapping], 1126 adapter, netdev); 1127} 1128 1129 1130static void 1131vmxnet3_rx_csum(struct vmxnet3_adapter *adapter, 1132 struct sk_buff *skb, 1133 union Vmxnet3_GenericDesc *gdesc) 1134{ 1135 if (!gdesc->rcd.cnc && adapter->netdev->features & NETIF_F_RXCSUM) { 1136 /* typical case: TCP/UDP over IP and both csums are correct */ 1137 if ((le32_to_cpu(gdesc->dword[3]) & VMXNET3_RCD_CSUM_OK) == 1138 VMXNET3_RCD_CSUM_OK) { 1139 skb->ip_summed = CHECKSUM_UNNECESSARY; 1140 BUG_ON(!(gdesc->rcd.tcp || gdesc->rcd.udp)); 1141 BUG_ON(!(gdesc->rcd.v4 || gdesc->rcd.v6)); 1142 BUG_ON(gdesc->rcd.frg); 1143 } else { 1144 if (gdesc->rcd.csum) { 1145 skb->csum = htons(gdesc->rcd.csum); 1146 skb->ip_summed = CHECKSUM_PARTIAL; 1147 } else { 1148 skb_checksum_none_assert(skb); 1149 } 1150 } 1151 } else { 1152 skb_checksum_none_assert(skb); 1153 } 1154} 1155 1156 1157static void 1158vmxnet3_rx_error(struct vmxnet3_rx_queue *rq, struct Vmxnet3_RxCompDesc *rcd, 1159 struct vmxnet3_rx_ctx *ctx, struct vmxnet3_adapter *adapter) 1160{ 1161 rq->stats.drop_err++; 1162 if (!rcd->fcs) 1163 rq->stats.drop_fcs++; 1164 1165 rq->stats.drop_total++; 1166 1167 /* 1168 * We do not unmap and chain the rx buffer to the skb. 1169 * We basically pretend this buffer is not used and will be recycled 1170 * by vmxnet3_rq_alloc_rx_buf() 1171 */ 1172 1173 /* 1174 * ctx->skb may be NULL if this is the first and the only one 1175 * desc for the pkt 1176 */ 1177 if (ctx->skb) 1178 dev_kfree_skb_irq(ctx->skb); 1179 1180 ctx->skb = NULL; 1181} 1182 1183 1184static u32 1185vmxnet3_get_hdr_len(struct vmxnet3_adapter *adapter, struct sk_buff *skb, 1186 union Vmxnet3_GenericDesc *gdesc) 1187{ 1188 u32 hlen, maplen; 1189 union { 1190 void *ptr; 1191 struct ethhdr *eth; 1192 struct iphdr *ipv4; 1193 struct ipv6hdr *ipv6; 1194 struct tcphdr *tcp; 1195 } hdr; 1196 BUG_ON(gdesc->rcd.tcp == 0); 1197 1198 maplen = skb_headlen(skb); 1199 if (unlikely(sizeof(struct iphdr) + sizeof(struct tcphdr) > maplen)) 1200 return 0; 1201 1202 hdr.eth = eth_hdr(skb); 1203 if (gdesc->rcd.v4) { 1204 BUG_ON(hdr.eth->h_proto != htons(ETH_P_IP)); 1205 hdr.ptr += sizeof(struct ethhdr); 1206 BUG_ON(hdr.ipv4->protocol != IPPROTO_TCP); 1207 hlen = hdr.ipv4->ihl << 2; 1208 hdr.ptr += hdr.ipv4->ihl << 2; 1209 } else if (gdesc->rcd.v6) { 1210 BUG_ON(hdr.eth->h_proto != htons(ETH_P_IPV6)); 1211 hdr.ptr += sizeof(struct ethhdr); 1212 /* Use an estimated value, since we also need to handle 1213 * TSO case. 1214 */ 1215 if (hdr.ipv6->nexthdr != IPPROTO_TCP) 1216 return sizeof(struct ipv6hdr) + sizeof(struct tcphdr); 1217 hlen = sizeof(struct ipv6hdr); 1218 hdr.ptr += sizeof(struct ipv6hdr); 1219 } else { 1220 /* Non-IP pkt, dont estimate header length */ 1221 return 0; 1222 } 1223 1224 if (hlen + sizeof(struct tcphdr) > maplen) 1225 return 0; 1226 1227 return (hlen + (hdr.tcp->doff << 2)); 1228} 1229 1230static int 1231vmxnet3_rq_rx_complete(struct vmxnet3_rx_queue *rq, 1232 struct vmxnet3_adapter *adapter, int quota) 1233{ 1234 static const u32 rxprod_reg[2] = { 1235 VMXNET3_REG_RXPROD, VMXNET3_REG_RXPROD2 1236 }; 1237 u32 num_pkts = 0; 1238 bool skip_page_frags = false; 1239 struct Vmxnet3_RxCompDesc *rcd; 1240 struct vmxnet3_rx_ctx *ctx = &rq->rx_ctx; 1241 u16 segCnt = 0, mss = 0; 1242#ifdef __BIG_ENDIAN_BITFIELD 1243 struct Vmxnet3_RxDesc rxCmdDesc; 1244 struct Vmxnet3_RxCompDesc rxComp; 1245#endif 1246 vmxnet3_getRxComp(rcd, &rq->comp_ring.base[rq->comp_ring.next2proc].rcd, 1247 &rxComp); 1248 while (rcd->gen == rq->comp_ring.gen) { 1249 struct vmxnet3_rx_buf_info *rbi; 1250 struct sk_buff *skb, *new_skb = NULL; 1251 struct page *new_page = NULL; 1252 dma_addr_t new_dma_addr; 1253 int num_to_alloc; 1254 struct Vmxnet3_RxDesc *rxd; 1255 u32 idx, ring_idx; 1256 struct vmxnet3_cmd_ring *ring = NULL; 1257 if (num_pkts >= quota) { 1258 /* we may stop even before we see the EOP desc of 1259 * the current pkt 1260 */ 1261 break; 1262 } 1263 BUG_ON(rcd->rqID != rq->qid && rcd->rqID != rq->qid2); 1264 idx = rcd->rxdIdx; 1265 ring_idx = rcd->rqID < adapter->num_rx_queues ? 0 : 1; 1266 ring = rq->rx_ring + ring_idx; 1267 vmxnet3_getRxDesc(rxd, &rq->rx_ring[ring_idx].base[idx].rxd, 1268 &rxCmdDesc); 1269 rbi = rq->buf_info[ring_idx] + idx; 1270 1271 BUG_ON(rxd->addr != rbi->dma_addr || 1272 rxd->len != rbi->len); 1273 1274 if (unlikely(rcd->eop && rcd->err)) { 1275 vmxnet3_rx_error(rq, rcd, ctx, adapter); 1276 goto rcd_done; 1277 } 1278 1279 if (rcd->sop) { /* first buf of the pkt */ 1280 BUG_ON(rxd->btype != VMXNET3_RXD_BTYPE_HEAD || 1281 rcd->rqID != rq->qid); 1282 1283 BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_SKB); 1284 BUG_ON(ctx->skb != NULL || rbi->skb == NULL); 1285 1286 if (unlikely(rcd->len == 0)) { 1287 /* Pretend the rx buffer is skipped. */ 1288 BUG_ON(!(rcd->sop && rcd->eop)); 1289 netdev_dbg(adapter->netdev, 1290 "rxRing[%u][%u] 0 length\n", 1291 ring_idx, idx); 1292 goto rcd_done; 1293 } 1294 1295 skip_page_frags = false; 1296 ctx->skb = rbi->skb; 1297 new_skb = netdev_alloc_skb_ip_align(adapter->netdev, 1298 rbi->len); 1299 if (new_skb == NULL) { 1300 /* Skb allocation failed, do not handover this 1301 * skb to stack. Reuse it. Drop the existing pkt 1302 */ 1303 rq->stats.rx_buf_alloc_failure++; 1304 ctx->skb = NULL; 1305 rq->stats.drop_total++; 1306 skip_page_frags = true; 1307 goto rcd_done; 1308 } 1309 new_dma_addr = dma_map_single(&adapter->pdev->dev, 1310 new_skb->data, rbi->len, 1311 PCI_DMA_FROMDEVICE); 1312 if (dma_mapping_error(&adapter->pdev->dev, 1313 new_dma_addr)) { 1314 dev_kfree_skb(new_skb); 1315 /* Skb allocation failed, do not handover this 1316 * skb to stack. Reuse it. Drop the existing pkt 1317 */ 1318 rq->stats.rx_buf_alloc_failure++; 1319 ctx->skb = NULL; 1320 rq->stats.drop_total++; 1321 skip_page_frags = true; 1322 goto rcd_done; 1323 } 1324 1325 dma_unmap_single(&adapter->pdev->dev, rbi->dma_addr, 1326 rbi->len, 1327 PCI_DMA_FROMDEVICE); 1328 1329#ifdef VMXNET3_RSS 1330 if (rcd->rssType != VMXNET3_RCD_RSS_TYPE_NONE && 1331 (adapter->netdev->features & NETIF_F_RXHASH)) 1332 skb_set_hash(ctx->skb, 1333 le32_to_cpu(rcd->rssHash), 1334 PKT_HASH_TYPE_L3); 1335#endif 1336 skb_put(ctx->skb, rcd->len); 1337 1338 /* Immediate refill */ 1339 rbi->skb = new_skb; 1340 rbi->dma_addr = new_dma_addr; 1341 rxd->addr = cpu_to_le64(rbi->dma_addr); 1342 rxd->len = rbi->len; 1343 if (adapter->version == 2 && 1344 rcd->type == VMXNET3_CDTYPE_RXCOMP_LRO) { 1345 struct Vmxnet3_RxCompDescExt *rcdlro; 1346 rcdlro = (struct Vmxnet3_RxCompDescExt *)rcd; 1347 1348 segCnt = rcdlro->segCnt; 1349 BUG_ON(segCnt <= 1); 1350 mss = rcdlro->mss; 1351 if (unlikely(segCnt <= 1)) 1352 segCnt = 0; 1353 } else { 1354 segCnt = 0; 1355 } 1356 } else { 1357 BUG_ON(ctx->skb == NULL && !skip_page_frags); 1358 1359 /* non SOP buffer must be type 1 in most cases */ 1360 BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_PAGE); 1361 BUG_ON(rxd->btype != VMXNET3_RXD_BTYPE_BODY); 1362 1363 /* If an sop buffer was dropped, skip all 1364 * following non-sop fragments. They will be reused. 1365 */ 1366 if (skip_page_frags) 1367 goto rcd_done; 1368 1369 if (rcd->len) { 1370 new_page = alloc_page(GFP_ATOMIC); 1371 /* Replacement page frag could not be allocated. 1372 * Reuse this page. Drop the pkt and free the 1373 * skb which contained this page as a frag. Skip 1374 * processing all the following non-sop frags. 1375 */ 1376 if (unlikely(!new_page)) { 1377 rq->stats.rx_buf_alloc_failure++; 1378 dev_kfree_skb(ctx->skb); 1379 ctx->skb = NULL; 1380 skip_page_frags = true; 1381 goto rcd_done; 1382 } 1383 new_dma_addr = dma_map_page(&adapter->pdev->dev, 1384 new_page, 1385 0, PAGE_SIZE, 1386 PCI_DMA_FROMDEVICE); 1387 if (dma_mapping_error(&adapter->pdev->dev, 1388 new_dma_addr)) { 1389 put_page(new_page); 1390 rq->stats.rx_buf_alloc_failure++; 1391 dev_kfree_skb(ctx->skb); 1392 ctx->skb = NULL; 1393 skip_page_frags = true; 1394 goto rcd_done; 1395 } 1396 1397 dma_unmap_page(&adapter->pdev->dev, 1398 rbi->dma_addr, rbi->len, 1399 PCI_DMA_FROMDEVICE); 1400 1401 vmxnet3_append_frag(ctx->skb, rcd, rbi); 1402 1403 /* Immediate refill */ 1404 rbi->page = new_page; 1405 rbi->dma_addr = new_dma_addr; 1406 rxd->addr = cpu_to_le64(rbi->dma_addr); 1407 rxd->len = rbi->len; 1408 } 1409 } 1410 1411 1412 skb = ctx->skb; 1413 if (rcd->eop) { 1414 u32 mtu = adapter->netdev->mtu; 1415 skb->len += skb->data_len; 1416 1417 vmxnet3_rx_csum(adapter, skb, 1418 (union Vmxnet3_GenericDesc *)rcd); 1419 skb->protocol = eth_type_trans(skb, adapter->netdev); 1420 if (!rcd->tcp || !adapter->lro) 1421 goto not_lro; 1422 1423 if (segCnt != 0 && mss != 0) { 1424 skb_shinfo(skb)->gso_type = rcd->v4 ? 1425 SKB_GSO_TCPV4 : SKB_GSO_TCPV6; 1426 skb_shinfo(skb)->gso_size = mss; 1427 skb_shinfo(skb)->gso_segs = segCnt; 1428 } else if (segCnt != 0 || skb->len > mtu) { 1429 u32 hlen; 1430 1431 hlen = vmxnet3_get_hdr_len(adapter, skb, 1432 (union Vmxnet3_GenericDesc *)rcd); 1433 if (hlen == 0) 1434 goto not_lro; 1435 1436 skb_shinfo(skb)->gso_type = 1437 rcd->v4 ? SKB_GSO_TCPV4 : SKB_GSO_TCPV6; 1438 if (segCnt != 0) { 1439 skb_shinfo(skb)->gso_segs = segCnt; 1440 skb_shinfo(skb)->gso_size = 1441 DIV_ROUND_UP(skb->len - 1442 hlen, segCnt); 1443 } else { 1444 skb_shinfo(skb)->gso_size = mtu - hlen; 1445 } 1446 } 1447not_lro: 1448 if (unlikely(rcd->ts)) 1449 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), rcd->tci); 1450 1451 if (adapter->netdev->features & NETIF_F_LRO) 1452 netif_receive_skb(skb); 1453 else 1454 napi_gro_receive(&rq->napi, skb); 1455 1456 ctx->skb = NULL; 1457 num_pkts++; 1458 } 1459 1460rcd_done: 1461 /* device may have skipped some rx descs */ 1462 ring->next2comp = idx; 1463 num_to_alloc = vmxnet3_cmd_ring_desc_avail(ring); 1464 ring = rq->rx_ring + ring_idx; 1465 while (num_to_alloc) { 1466 vmxnet3_getRxDesc(rxd, &ring->base[ring->next2fill].rxd, 1467 &rxCmdDesc); 1468 BUG_ON(!rxd->addr); 1469 1470 /* Recv desc is ready to be used by the device */ 1471 rxd->gen = ring->gen; 1472 vmxnet3_cmd_ring_adv_next2fill(ring); 1473 num_to_alloc--; 1474 } 1475 1476 /* if needed, update the register */ 1477 if (unlikely(rq->shared->updateRxProd)) { 1478 VMXNET3_WRITE_BAR0_REG(adapter, 1479 rxprod_reg[ring_idx] + rq->qid * 8, 1480 ring->next2fill); 1481 } 1482 1483 vmxnet3_comp_ring_adv_next2proc(&rq->comp_ring); 1484 vmxnet3_getRxComp(rcd, 1485 &rq->comp_ring.base[rq->comp_ring.next2proc].rcd, &rxComp); 1486 } 1487 1488 return num_pkts; 1489} 1490 1491 1492static void 1493vmxnet3_rq_cleanup(struct vmxnet3_rx_queue *rq, 1494 struct vmxnet3_adapter *adapter) 1495{ 1496 u32 i, ring_idx; 1497 struct Vmxnet3_RxDesc *rxd; 1498 1499 for (ring_idx = 0; ring_idx < 2; ring_idx++) { 1500 for (i = 0; i < rq->rx_ring[ring_idx].size; i++) { 1501#ifdef __BIG_ENDIAN_BITFIELD 1502 struct Vmxnet3_RxDesc rxDesc; 1503#endif 1504 vmxnet3_getRxDesc(rxd, 1505 &rq->rx_ring[ring_idx].base[i].rxd, &rxDesc); 1506 1507 if (rxd->btype == VMXNET3_RXD_BTYPE_HEAD && 1508 rq->buf_info[ring_idx][i].skb) { 1509 dma_unmap_single(&adapter->pdev->dev, rxd->addr, 1510 rxd->len, PCI_DMA_FROMDEVICE); 1511 dev_kfree_skb(rq->buf_info[ring_idx][i].skb); 1512 rq->buf_info[ring_idx][i].skb = NULL; 1513 } else if (rxd->btype == VMXNET3_RXD_BTYPE_BODY && 1514 rq->buf_info[ring_idx][i].page) { 1515 dma_unmap_page(&adapter->pdev->dev, rxd->addr, 1516 rxd->len, PCI_DMA_FROMDEVICE); 1517 put_page(rq->buf_info[ring_idx][i].page); 1518 rq->buf_info[ring_idx][i].page = NULL; 1519 } 1520 } 1521 1522 rq->rx_ring[ring_idx].gen = VMXNET3_INIT_GEN; 1523 rq->rx_ring[ring_idx].next2fill = 1524 rq->rx_ring[ring_idx].next2comp = 0; 1525 } 1526 1527 rq->comp_ring.gen = VMXNET3_INIT_GEN; 1528 rq->comp_ring.next2proc = 0; 1529} 1530 1531 1532static void 1533vmxnet3_rq_cleanup_all(struct vmxnet3_adapter *adapter) 1534{ 1535 int i; 1536 1537 for (i = 0; i < adapter->num_rx_queues; i++) 1538 vmxnet3_rq_cleanup(&adapter->rx_queue[i], adapter); 1539} 1540 1541 1542static void vmxnet3_rq_destroy(struct vmxnet3_rx_queue *rq, 1543 struct vmxnet3_adapter *adapter) 1544{ 1545 int i; 1546 int j; 1547 1548 /* all rx buffers must have already been freed */ 1549 for (i = 0; i < 2; i++) { 1550 if (rq->buf_info[i]) { 1551 for (j = 0; j < rq->rx_ring[i].size; j++) 1552 BUG_ON(rq->buf_info[i][j].page != NULL); 1553 } 1554 } 1555 1556 1557 for (i = 0; i < 2; i++) { 1558 if (rq->rx_ring[i].base) { 1559 dma_free_coherent(&adapter->pdev->dev, 1560 rq->rx_ring[i].size 1561 * sizeof(struct Vmxnet3_RxDesc), 1562 rq->rx_ring[i].base, 1563 rq->rx_ring[i].basePA); 1564 rq->rx_ring[i].base = NULL; 1565 } 1566 rq->buf_info[i] = NULL; 1567 } 1568 1569 if (rq->comp_ring.base) { 1570 dma_free_coherent(&adapter->pdev->dev, rq->comp_ring.size 1571 * sizeof(struct Vmxnet3_RxCompDesc), 1572 rq->comp_ring.base, rq->comp_ring.basePA); 1573 rq->comp_ring.base = NULL; 1574 } 1575 1576 if (rq->buf_info[0]) { 1577 size_t sz = sizeof(struct vmxnet3_rx_buf_info) * 1578 (rq->rx_ring[0].size + rq->rx_ring[1].size); 1579 dma_free_coherent(&adapter->pdev->dev, sz, rq->buf_info[0], 1580 rq->buf_info_pa); 1581 } 1582} 1583 1584 1585static int 1586vmxnet3_rq_init(struct vmxnet3_rx_queue *rq, 1587 struct vmxnet3_adapter *adapter) 1588{ 1589 int i; 1590 1591 /* initialize buf_info */ 1592 for (i = 0; i < rq->rx_ring[0].size; i++) { 1593 1594 /* 1st buf for a pkt is skbuff */ 1595 if (i % adapter->rx_buf_per_pkt == 0) { 1596 rq->buf_info[0][i].buf_type = VMXNET3_RX_BUF_SKB; 1597 rq->buf_info[0][i].len = adapter->skb_buf_size; 1598 } else { /* subsequent bufs for a pkt is frag */ 1599 rq->buf_info[0][i].buf_type = VMXNET3_RX_BUF_PAGE; 1600 rq->buf_info[0][i].len = PAGE_SIZE; 1601 } 1602 } 1603 for (i = 0; i < rq->rx_ring[1].size; i++) { 1604 rq->buf_info[1][i].buf_type = VMXNET3_RX_BUF_PAGE; 1605 rq->buf_info[1][i].len = PAGE_SIZE; 1606 } 1607 1608 /* reset internal state and allocate buffers for both rings */ 1609 for (i = 0; i < 2; i++) { 1610 rq->rx_ring[i].next2fill = rq->rx_ring[i].next2comp = 0; 1611 1612 memset(rq->rx_ring[i].base, 0, rq->rx_ring[i].size * 1613 sizeof(struct Vmxnet3_RxDesc)); 1614 rq->rx_ring[i].gen = VMXNET3_INIT_GEN; 1615 } 1616 if (vmxnet3_rq_alloc_rx_buf(rq, 0, rq->rx_ring[0].size - 1, 1617 adapter) == 0) { 1618 /* at least has 1 rx buffer for the 1st ring */ 1619 return -ENOMEM; 1620 } 1621 vmxnet3_rq_alloc_rx_buf(rq, 1, rq->rx_ring[1].size - 1, adapter); 1622 1623 /* reset the comp ring */ 1624 rq->comp_ring.next2proc = 0; 1625 memset(rq->comp_ring.base, 0, rq->comp_ring.size * 1626 sizeof(struct Vmxnet3_RxCompDesc)); 1627 rq->comp_ring.gen = VMXNET3_INIT_GEN; 1628 1629 /* reset rxctx */ 1630 rq->rx_ctx.skb = NULL; 1631 1632 /* stats are not reset */ 1633 return 0; 1634} 1635 1636 1637static int 1638vmxnet3_rq_init_all(struct vmxnet3_adapter *adapter) 1639{ 1640 int i, err = 0; 1641 1642 for (i = 0; i < adapter->num_rx_queues; i++) { 1643 err = vmxnet3_rq_init(&adapter->rx_queue[i], adapter); 1644 if (unlikely(err)) { 1645 dev_err(&adapter->netdev->dev, "%s: failed to " 1646 "initialize rx queue%i\n", 1647 adapter->netdev->name, i); 1648 break; 1649 } 1650 } 1651 return err; 1652 1653} 1654 1655 1656static int 1657vmxnet3_rq_create(struct vmxnet3_rx_queue *rq, struct vmxnet3_adapter *adapter) 1658{ 1659 int i; 1660 size_t sz; 1661 struct vmxnet3_rx_buf_info *bi; 1662 1663 for (i = 0; i < 2; i++) { 1664 1665 sz = rq->rx_ring[i].size * sizeof(struct Vmxnet3_RxDesc); 1666 rq->rx_ring[i].base = dma_alloc_coherent( 1667 &adapter->pdev->dev, sz, 1668 &rq->rx_ring[i].basePA, 1669 GFP_KERNEL); 1670 if (!rq->rx_ring[i].base) { 1671 netdev_err(adapter->netdev, 1672 "failed to allocate rx ring %d\n", i); 1673 goto err; 1674 } 1675 } 1676 1677 sz = rq->comp_ring.size * sizeof(struct Vmxnet3_RxCompDesc); 1678 rq->comp_ring.base = dma_alloc_coherent(&adapter->pdev->dev, sz, 1679 &rq->comp_ring.basePA, 1680 GFP_KERNEL); 1681 if (!rq->comp_ring.base) { 1682 netdev_err(adapter->netdev, "failed to allocate rx comp ring\n"); 1683 goto err; 1684 } 1685 1686 sz = sizeof(struct vmxnet3_rx_buf_info) * (rq->rx_ring[0].size + 1687 rq->rx_ring[1].size); 1688 bi = dma_zalloc_coherent(&adapter->pdev->dev, sz, &rq->buf_info_pa, 1689 GFP_KERNEL); 1690 if (!bi) 1691 goto err; 1692 1693 rq->buf_info[0] = bi; 1694 rq->buf_info[1] = bi + rq->rx_ring[0].size; 1695 1696 return 0; 1697 1698err: 1699 vmxnet3_rq_destroy(rq, adapter); 1700 return -ENOMEM; 1701} 1702 1703 1704static int 1705vmxnet3_rq_create_all(struct vmxnet3_adapter *adapter) 1706{ 1707 int i, err = 0; 1708 1709 for (i = 0; i < adapter->num_rx_queues; i++) { 1710 err = vmxnet3_rq_create(&adapter->rx_queue[i], adapter); 1711 if (unlikely(err)) { 1712 dev_err(&adapter->netdev->dev, 1713 "%s: failed to create rx queue%i\n", 1714 adapter->netdev->name, i); 1715 goto err_out; 1716 } 1717 } 1718 return err; 1719err_out: 1720 vmxnet3_rq_destroy_all(adapter); 1721 return err; 1722 1723} 1724 1725/* Multiple queue aware polling function for tx and rx */ 1726 1727static int 1728vmxnet3_do_poll(struct vmxnet3_adapter *adapter, int budget) 1729{ 1730 int rcd_done = 0, i; 1731 if (unlikely(adapter->shared->ecr)) 1732 vmxnet3_process_events(adapter); 1733 for (i = 0; i < adapter->num_tx_queues; i++) 1734 vmxnet3_tq_tx_complete(&adapter->tx_queue[i], adapter); 1735 1736 for (i = 0; i < adapter->num_rx_queues; i++) 1737 rcd_done += vmxnet3_rq_rx_complete(&adapter->rx_queue[i], 1738 adapter, budget); 1739 return rcd_done; 1740} 1741 1742 1743static int 1744vmxnet3_poll(struct napi_struct *napi, int budget) 1745{ 1746 struct vmxnet3_rx_queue *rx_queue = container_of(napi, 1747 struct vmxnet3_rx_queue, napi); 1748 int rxd_done; 1749 1750 rxd_done = vmxnet3_do_poll(rx_queue->adapter, budget); 1751 1752 if (rxd_done < budget) { 1753 napi_complete(napi); 1754 vmxnet3_enable_all_intrs(rx_queue->adapter); 1755 } 1756 return rxd_done; 1757} 1758 1759/* 1760 * NAPI polling function for MSI-X mode with multiple Rx queues 1761 * Returns the # of the NAPI credit consumed (# of rx descriptors processed) 1762 */ 1763 1764static int 1765vmxnet3_poll_rx_only(struct napi_struct *napi, int budget) 1766{ 1767 struct vmxnet3_rx_queue *rq = container_of(napi, 1768 struct vmxnet3_rx_queue, napi); 1769 struct vmxnet3_adapter *adapter = rq->adapter; 1770 int rxd_done; 1771 1772 /* When sharing interrupt with corresponding tx queue, process 1773 * tx completions in that queue as well 1774 */ 1775 if (adapter->share_intr == VMXNET3_INTR_BUDDYSHARE) { 1776 struct vmxnet3_tx_queue *tq = 1777 &adapter->tx_queue[rq - adapter->rx_queue]; 1778 vmxnet3_tq_tx_complete(tq, adapter); 1779 } 1780 1781 rxd_done = vmxnet3_rq_rx_complete(rq, adapter, budget); 1782 1783 if (rxd_done < budget) { 1784 napi_complete(napi); 1785 vmxnet3_enable_intr(adapter, rq->comp_ring.intr_idx); 1786 } 1787 return rxd_done; 1788} 1789 1790 1791#ifdef CONFIG_PCI_MSI 1792 1793/* 1794 * Handle completion interrupts on tx queues 1795 * Returns whether or not the intr is handled 1796 */ 1797 1798static irqreturn_t 1799vmxnet3_msix_tx(int irq, void *data) 1800{ 1801 struct vmxnet3_tx_queue *tq = data; 1802 struct vmxnet3_adapter *adapter = tq->adapter; 1803 1804 if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE) 1805 vmxnet3_disable_intr(adapter, tq->comp_ring.intr_idx); 1806 1807 /* Handle the case where only one irq is allocate for all tx queues */ 1808 if (adapter->share_intr == VMXNET3_INTR_TXSHARE) { 1809 int i; 1810 for (i = 0; i < adapter->num_tx_queues; i++) { 1811 struct vmxnet3_tx_queue *txq = &adapter->tx_queue[i]; 1812 vmxnet3_tq_tx_complete(txq, adapter); 1813 } 1814 } else { 1815 vmxnet3_tq_tx_complete(tq, adapter); 1816 } 1817 vmxnet3_enable_intr(adapter, tq->comp_ring.intr_idx); 1818 1819 return IRQ_HANDLED; 1820} 1821 1822 1823/* 1824 * Handle completion interrupts on rx queues. Returns whether or not the 1825 * intr is handled 1826 */ 1827 1828static irqreturn_t 1829vmxnet3_msix_rx(int irq, void *data) 1830{ 1831 struct vmxnet3_rx_queue *rq = data; 1832 struct vmxnet3_adapter *adapter = rq->adapter; 1833 1834 /* disable intr if needed */ 1835 if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE) 1836 vmxnet3_disable_intr(adapter, rq->comp_ring.intr_idx); 1837 napi_schedule(&rq->napi); 1838 1839 return IRQ_HANDLED; 1840} 1841 1842/* 1843 *---------------------------------------------------------------------------- 1844 * 1845 * vmxnet3_msix_event -- 1846 * 1847 * vmxnet3 msix event intr handler 1848 * 1849 * Result: 1850 * whether or not the intr is handled 1851 * 1852 *---------------------------------------------------------------------------- 1853 */ 1854 1855static irqreturn_t 1856vmxnet3_msix_event(int irq, void *data) 1857{ 1858 struct net_device *dev = data; 1859 struct vmxnet3_adapter *adapter = netdev_priv(dev); 1860 1861 /* disable intr if needed */ 1862 if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE) 1863 vmxnet3_disable_intr(adapter, adapter->intr.event_intr_idx); 1864 1865 if (adapter->shared->ecr) 1866 vmxnet3_process_events(adapter); 1867 1868 vmxnet3_enable_intr(adapter, adapter->intr.event_intr_idx); 1869 1870 return IRQ_HANDLED; 1871} 1872 1873#endif /* CONFIG_PCI_MSI */ 1874 1875 1876/* Interrupt handler for vmxnet3 */ 1877static irqreturn_t 1878vmxnet3_intr(int irq, void *dev_id) 1879{ 1880 struct net_device *dev = dev_id; 1881 struct vmxnet3_adapter *adapter = netdev_priv(dev); 1882 1883 if (adapter->intr.type == VMXNET3_IT_INTX) { 1884 u32 icr = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_ICR); 1885 if (unlikely(icr == 0)) 1886 /* not ours */ 1887 return IRQ_NONE; 1888 } 1889 1890 1891 /* disable intr if needed */ 1892 if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE) 1893 vmxnet3_disable_all_intrs(adapter); 1894 1895 napi_schedule(&adapter->rx_queue[0].napi); 1896 1897 return IRQ_HANDLED; 1898} 1899 1900#ifdef CONFIG_NET_POLL_CONTROLLER 1901 1902/* netpoll callback. */ 1903static void 1904vmxnet3_netpoll(struct net_device *netdev) 1905{ 1906 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 1907 1908 switch (adapter->intr.type) { 1909#ifdef CONFIG_PCI_MSI 1910 case VMXNET3_IT_MSIX: { 1911 int i; 1912 for (i = 0; i < adapter->num_rx_queues; i++) 1913 vmxnet3_msix_rx(0, &adapter->rx_queue[i]); 1914 break; 1915 } 1916#endif 1917 case VMXNET3_IT_MSI: 1918 default: 1919 vmxnet3_intr(0, adapter->netdev); 1920 break; 1921 } 1922 1923} 1924#endif /* CONFIG_NET_POLL_CONTROLLER */ 1925 1926static int 1927vmxnet3_request_irqs(struct vmxnet3_adapter *adapter) 1928{ 1929 struct vmxnet3_intr *intr = &adapter->intr; 1930 int err = 0, i; 1931 int vector = 0; 1932 1933#ifdef CONFIG_PCI_MSI 1934 if (adapter->intr.type == VMXNET3_IT_MSIX) { 1935 for (i = 0; i < adapter->num_tx_queues; i++) { 1936 if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE) { 1937 sprintf(adapter->tx_queue[i].name, "%s-tx-%d", 1938 adapter->netdev->name, vector); 1939 err = request_irq( 1940 intr->msix_entries[vector].vector, 1941 vmxnet3_msix_tx, 0, 1942 adapter->tx_queue[i].name, 1943 &adapter->tx_queue[i]); 1944 } else { 1945 sprintf(adapter->tx_queue[i].name, "%s-rxtx-%d", 1946 adapter->netdev->name, vector); 1947 } 1948 if (err) { 1949 dev_err(&adapter->netdev->dev, 1950 "Failed to request irq for MSIX, %s, " 1951 "error %d\n", 1952 adapter->tx_queue[i].name, err); 1953 return err; 1954 } 1955 1956 /* Handle the case where only 1 MSIx was allocated for 1957 * all tx queues */ 1958 if (adapter->share_intr == VMXNET3_INTR_TXSHARE) { 1959 for (; i < adapter->num_tx_queues; i++) 1960 adapter->tx_queue[i].comp_ring.intr_idx 1961 = vector; 1962 vector++; 1963 break; 1964 } else { 1965 adapter->tx_queue[i].comp_ring.intr_idx 1966 = vector++; 1967 } 1968 } 1969 if (adapter->share_intr == VMXNET3_INTR_BUDDYSHARE) 1970 vector = 0; 1971 1972 for (i = 0; i < adapter->num_rx_queues; i++) { 1973 if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE) 1974 sprintf(adapter->rx_queue[i].name, "%s-rx-%d", 1975 adapter->netdev->name, vector); 1976 else 1977 sprintf(adapter->rx_queue[i].name, "%s-rxtx-%d", 1978 adapter->netdev->name, vector); 1979 err = request_irq(intr->msix_entries[vector].vector, 1980 vmxnet3_msix_rx, 0, 1981 adapter->rx_queue[i].name, 1982 &(adapter->rx_queue[i])); 1983 if (err) { 1984 netdev_err(adapter->netdev, 1985 "Failed to request irq for MSIX, " 1986 "%s, error %d\n", 1987 adapter->rx_queue[i].name, err); 1988 return err; 1989 } 1990 1991 adapter->rx_queue[i].comp_ring.intr_idx = vector++; 1992 } 1993 1994 sprintf(intr->event_msi_vector_name, "%s-event-%d", 1995 adapter->netdev->name, vector); 1996 err = request_irq(intr->msix_entries[vector].vector, 1997 vmxnet3_msix_event, 0, 1998 intr->event_msi_vector_name, adapter->netdev); 1999 intr->event_intr_idx = vector; 2000 2001 } else if (intr->type == VMXNET3_IT_MSI) { 2002 adapter->num_rx_queues = 1; 2003 err = request_irq(adapter->pdev->irq, vmxnet3_intr, 0, 2004 adapter->netdev->name, adapter->netdev); 2005 } else { 2006#endif 2007 adapter->num_rx_queues = 1; 2008 err = request_irq(adapter->pdev->irq, vmxnet3_intr, 2009 IRQF_SHARED, adapter->netdev->name, 2010 adapter->netdev); 2011#ifdef CONFIG_PCI_MSI 2012 } 2013#endif 2014 intr->num_intrs = vector + 1; 2015 if (err) { 2016 netdev_err(adapter->netdev, 2017 "Failed to request irq (intr type:%d), error %d\n", 2018 intr->type, err); 2019 } else { 2020 /* Number of rx queues will not change after this */ 2021 for (i = 0; i < adapter->num_rx_queues; i++) { 2022 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i]; 2023 rq->qid = i; 2024 rq->qid2 = i + adapter->num_rx_queues; 2025 } 2026 2027 2028 2029 /* init our intr settings */ 2030 for (i = 0; i < intr->num_intrs; i++) 2031 intr->mod_levels[i] = UPT1_IML_ADAPTIVE; 2032 if (adapter->intr.type != VMXNET3_IT_MSIX) { 2033 adapter->intr.event_intr_idx = 0; 2034 for (i = 0; i < adapter->num_tx_queues; i++) 2035 adapter->tx_queue[i].comp_ring.intr_idx = 0; 2036 adapter->rx_queue[0].comp_ring.intr_idx = 0; 2037 } 2038 2039 netdev_info(adapter->netdev, 2040 "intr type %u, mode %u, %u vectors allocated\n", 2041 intr->type, intr->mask_mode, intr->num_intrs); 2042 } 2043 2044 return err; 2045} 2046 2047 2048static void 2049vmxnet3_free_irqs(struct vmxnet3_adapter *adapter) 2050{ 2051 struct vmxnet3_intr *intr = &adapter->intr; 2052 BUG_ON(intr->type == VMXNET3_IT_AUTO || intr->num_intrs <= 0); 2053 2054 switch (intr->type) { 2055#ifdef CONFIG_PCI_MSI 2056 case VMXNET3_IT_MSIX: 2057 { 2058 int i, vector = 0; 2059 2060 if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE) { 2061 for (i = 0; i < adapter->num_tx_queues; i++) { 2062 free_irq(intr->msix_entries[vector++].vector, 2063 &(adapter->tx_queue[i])); 2064 if (adapter->share_intr == VMXNET3_INTR_TXSHARE) 2065 break; 2066 } 2067 } 2068 2069 for (i = 0; i < adapter->num_rx_queues; i++) { 2070 free_irq(intr->msix_entries[vector++].vector, 2071 &(adapter->rx_queue[i])); 2072 } 2073 2074 free_irq(intr->msix_entries[vector].vector, 2075 adapter->netdev); 2076 BUG_ON(vector >= intr->num_intrs); 2077 break; 2078 } 2079#endif 2080 case VMXNET3_IT_MSI: 2081 free_irq(adapter->pdev->irq, adapter->netdev); 2082 break; 2083 case VMXNET3_IT_INTX: 2084 free_irq(adapter->pdev->irq, adapter->netdev); 2085 break; 2086 default: 2087 BUG(); 2088 } 2089} 2090 2091 2092static void 2093vmxnet3_restore_vlan(struct vmxnet3_adapter *adapter) 2094{ 2095 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable; 2096 u16 vid; 2097 2098 /* allow untagged pkts */ 2099 VMXNET3_SET_VFTABLE_ENTRY(vfTable, 0); 2100 2101 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID) 2102 VMXNET3_SET_VFTABLE_ENTRY(vfTable, vid); 2103} 2104 2105 2106static int 2107vmxnet3_vlan_rx_add_vid(struct net_device *netdev, __be16 proto, u16 vid) 2108{ 2109 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 2110 2111 if (!(netdev->flags & IFF_PROMISC)) { 2112 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable; 2113 unsigned long flags; 2114 2115 VMXNET3_SET_VFTABLE_ENTRY(vfTable, vid); 2116 spin_lock_irqsave(&adapter->cmd_lock, flags); 2117 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 2118 VMXNET3_CMD_UPDATE_VLAN_FILTERS); 2119 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 2120 } 2121 2122 set_bit(vid, adapter->active_vlans); 2123 2124 return 0; 2125} 2126 2127 2128static int 2129vmxnet3_vlan_rx_kill_vid(struct net_device *netdev, __be16 proto, u16 vid) 2130{ 2131 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 2132 2133 if (!(netdev->flags & IFF_PROMISC)) { 2134 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable; 2135 unsigned long flags; 2136 2137 VMXNET3_CLEAR_VFTABLE_ENTRY(vfTable, vid); 2138 spin_lock_irqsave(&adapter->cmd_lock, flags); 2139 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 2140 VMXNET3_CMD_UPDATE_VLAN_FILTERS); 2141 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 2142 } 2143 2144 clear_bit(vid, adapter->active_vlans); 2145 2146 return 0; 2147} 2148 2149 2150static u8 * 2151vmxnet3_copy_mc(struct net_device *netdev) 2152{ 2153 u8 *buf = NULL; 2154 u32 sz = netdev_mc_count(netdev) * ETH_ALEN; 2155 2156 /* struct Vmxnet3_RxFilterConf.mfTableLen is u16. */ 2157 if (sz <= 0xffff) { 2158 /* We may be called with BH disabled */ 2159 buf = kmalloc(sz, GFP_ATOMIC); 2160 if (buf) { 2161 struct netdev_hw_addr *ha; 2162 int i = 0; 2163 2164 netdev_for_each_mc_addr(ha, netdev) 2165 memcpy(buf + i++ * ETH_ALEN, ha->addr, 2166 ETH_ALEN); 2167 } 2168 } 2169 return buf; 2170} 2171 2172 2173static void 2174vmxnet3_set_mc(struct net_device *netdev) 2175{ 2176 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 2177 unsigned long flags; 2178 struct Vmxnet3_RxFilterConf *rxConf = 2179 &adapter->shared->devRead.rxFilterConf; 2180 u8 *new_table = NULL; 2181 dma_addr_t new_table_pa = 0; 2182 u32 new_mode = VMXNET3_RXM_UCAST; 2183 2184 if (netdev->flags & IFF_PROMISC) { 2185 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable; 2186 memset(vfTable, 0, VMXNET3_VFT_SIZE * sizeof(*vfTable)); 2187 2188 new_mode |= VMXNET3_RXM_PROMISC; 2189 } else { 2190 vmxnet3_restore_vlan(adapter); 2191 } 2192 2193 if (netdev->flags & IFF_BROADCAST) 2194 new_mode |= VMXNET3_RXM_BCAST; 2195 2196 if (netdev->flags & IFF_ALLMULTI) 2197 new_mode |= VMXNET3_RXM_ALL_MULTI; 2198 else 2199 if (!netdev_mc_empty(netdev)) { 2200 new_table = vmxnet3_copy_mc(netdev); 2201 if (new_table) { 2202 size_t sz = netdev_mc_count(netdev) * ETH_ALEN; 2203 2204 rxConf->mfTableLen = cpu_to_le16(sz); 2205 new_table_pa = dma_map_single( 2206 &adapter->pdev->dev, 2207 new_table, 2208 sz, 2209 PCI_DMA_TODEVICE); 2210 } 2211 2212 if (!dma_mapping_error(&adapter->pdev->dev, 2213 new_table_pa)) { 2214 new_mode |= VMXNET3_RXM_MCAST; 2215 rxConf->mfTablePA = cpu_to_le64(new_table_pa); 2216 } else { 2217 netdev_info(netdev, 2218 "failed to copy mcast list, setting ALL_MULTI\n"); 2219 new_mode |= VMXNET3_RXM_ALL_MULTI; 2220 } 2221 } 2222 2223 if (!(new_mode & VMXNET3_RXM_MCAST)) { 2224 rxConf->mfTableLen = 0; 2225 rxConf->mfTablePA = 0; 2226 } 2227 2228 spin_lock_irqsave(&adapter->cmd_lock, flags); 2229 if (new_mode != rxConf->rxMode) { 2230 rxConf->rxMode = cpu_to_le32(new_mode); 2231 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 2232 VMXNET3_CMD_UPDATE_RX_MODE); 2233 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 2234 VMXNET3_CMD_UPDATE_VLAN_FILTERS); 2235 } 2236 2237 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 2238 VMXNET3_CMD_UPDATE_MAC_FILTERS); 2239 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 2240 2241 if (new_table_pa) 2242 dma_unmap_single(&adapter->pdev->dev, new_table_pa, 2243 rxConf->mfTableLen, PCI_DMA_TODEVICE); 2244 kfree(new_table); 2245} 2246 2247void 2248vmxnet3_rq_destroy_all(struct vmxnet3_adapter *adapter) 2249{ 2250 int i; 2251 2252 for (i = 0; i < adapter->num_rx_queues; i++) 2253 vmxnet3_rq_destroy(&adapter->rx_queue[i], adapter); 2254} 2255 2256 2257/* 2258 * Set up driver_shared based on settings in adapter. 2259 */ 2260 2261static void 2262vmxnet3_setup_driver_shared(struct vmxnet3_adapter *adapter) 2263{ 2264 struct Vmxnet3_DriverShared *shared = adapter->shared; 2265 struct Vmxnet3_DSDevRead *devRead = &shared->devRead; 2266 struct Vmxnet3_TxQueueConf *tqc; 2267 struct Vmxnet3_RxQueueConf *rqc; 2268 int i; 2269 2270 memset(shared, 0, sizeof(*shared)); 2271 2272 /* driver settings */ 2273 shared->magic = cpu_to_le32(VMXNET3_REV1_MAGIC); 2274 devRead->misc.driverInfo.version = cpu_to_le32( 2275 VMXNET3_DRIVER_VERSION_NUM); 2276 devRead->misc.driverInfo.gos.gosBits = (sizeof(void *) == 4 ? 2277 VMXNET3_GOS_BITS_32 : VMXNET3_GOS_BITS_64); 2278 devRead->misc.driverInfo.gos.gosType = VMXNET3_GOS_TYPE_LINUX; 2279 *((u32 *)&devRead->misc.driverInfo.gos) = cpu_to_le32( 2280 *((u32 *)&devRead->misc.driverInfo.gos)); 2281 devRead->misc.driverInfo.vmxnet3RevSpt = cpu_to_le32(1); 2282 devRead->misc.driverInfo.uptVerSpt = cpu_to_le32(1); 2283 2284 devRead->misc.ddPA = cpu_to_le64(adapter->adapter_pa); 2285 devRead->misc.ddLen = cpu_to_le32(sizeof(struct vmxnet3_adapter)); 2286 2287 /* set up feature flags */ 2288 if (adapter->netdev->features & NETIF_F_RXCSUM) 2289 devRead->misc.uptFeatures |= UPT1_F_RXCSUM; 2290 2291 if (adapter->netdev->features & NETIF_F_LRO) { 2292 devRead->misc.uptFeatures |= UPT1_F_LRO; 2293 devRead->misc.maxNumRxSG = cpu_to_le16(1 + MAX_SKB_FRAGS); 2294 } 2295 if (adapter->netdev->features & NETIF_F_HW_VLAN_CTAG_RX) 2296 devRead->misc.uptFeatures |= UPT1_F_RXVLAN; 2297 2298 devRead->misc.mtu = cpu_to_le32(adapter->netdev->mtu); 2299 devRead->misc.queueDescPA = cpu_to_le64(adapter->queue_desc_pa); 2300 devRead->misc.queueDescLen = cpu_to_le32( 2301 adapter->num_tx_queues * sizeof(struct Vmxnet3_TxQueueDesc) + 2302 adapter->num_rx_queues * sizeof(struct Vmxnet3_RxQueueDesc)); 2303 2304 /* tx queue settings */ 2305 devRead->misc.numTxQueues = adapter->num_tx_queues; 2306 for (i = 0; i < adapter->num_tx_queues; i++) { 2307 struct vmxnet3_tx_queue *tq = &adapter->tx_queue[i]; 2308 BUG_ON(adapter->tx_queue[i].tx_ring.base == NULL); 2309 tqc = &adapter->tqd_start[i].conf; 2310 tqc->txRingBasePA = cpu_to_le64(tq->tx_ring.basePA); 2311 tqc->dataRingBasePA = cpu_to_le64(tq->data_ring.basePA); 2312 tqc->compRingBasePA = cpu_to_le64(tq->comp_ring.basePA); 2313 tqc->ddPA = cpu_to_le64(tq->buf_info_pa); 2314 tqc->txRingSize = cpu_to_le32(tq->tx_ring.size); 2315 tqc->dataRingSize = cpu_to_le32(tq->data_ring.size); 2316 tqc->compRingSize = cpu_to_le32(tq->comp_ring.size); 2317 tqc->ddLen = cpu_to_le32( 2318 sizeof(struct vmxnet3_tx_buf_info) * 2319 tqc->txRingSize); 2320 tqc->intrIdx = tq->comp_ring.intr_idx; 2321 } 2322 2323 /* rx queue settings */ 2324 devRead->misc.numRxQueues = adapter->num_rx_queues; 2325 for (i = 0; i < adapter->num_rx_queues; i++) { 2326 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i]; 2327 rqc = &adapter->rqd_start[i].conf; 2328 rqc->rxRingBasePA[0] = cpu_to_le64(rq->rx_ring[0].basePA); 2329 rqc->rxRingBasePA[1] = cpu_to_le64(rq->rx_ring[1].basePA); 2330 rqc->compRingBasePA = cpu_to_le64(rq->comp_ring.basePA); 2331 rqc->ddPA = cpu_to_le64(rq->buf_info_pa); 2332 rqc->rxRingSize[0] = cpu_to_le32(rq->rx_ring[0].size); 2333 rqc->rxRingSize[1] = cpu_to_le32(rq->rx_ring[1].size); 2334 rqc->compRingSize = cpu_to_le32(rq->comp_ring.size); 2335 rqc->ddLen = cpu_to_le32( 2336 sizeof(struct vmxnet3_rx_buf_info) * 2337 (rqc->rxRingSize[0] + 2338 rqc->rxRingSize[1])); 2339 rqc->intrIdx = rq->comp_ring.intr_idx; 2340 } 2341 2342#ifdef VMXNET3_RSS 2343 memset(adapter->rss_conf, 0, sizeof(*adapter->rss_conf)); 2344 2345 if (adapter->rss) { 2346 struct UPT1_RSSConf *rssConf = adapter->rss_conf; 2347 2348 devRead->misc.uptFeatures |= UPT1_F_RSS; 2349 devRead->misc.numRxQueues = adapter->num_rx_queues; 2350 rssConf->hashType = UPT1_RSS_HASH_TYPE_TCP_IPV4 | 2351 UPT1_RSS_HASH_TYPE_IPV4 | 2352 UPT1_RSS_HASH_TYPE_TCP_IPV6 | 2353 UPT1_RSS_HASH_TYPE_IPV6; 2354 rssConf->hashFunc = UPT1_RSS_HASH_FUNC_TOEPLITZ; 2355 rssConf->hashKeySize = UPT1_RSS_MAX_KEY_SIZE; 2356 rssConf->indTableSize = VMXNET3_RSS_IND_TABLE_SIZE; 2357 netdev_rss_key_fill(rssConf->hashKey, sizeof(rssConf->hashKey)); 2358 2359 for (i = 0; i < rssConf->indTableSize; i++) 2360 rssConf->indTable[i] = ethtool_rxfh_indir_default( 2361 i, adapter->num_rx_queues); 2362 2363 devRead->rssConfDesc.confVer = 1; 2364 devRead->rssConfDesc.confLen = cpu_to_le32(sizeof(*rssConf)); 2365 devRead->rssConfDesc.confPA = 2366 cpu_to_le64(adapter->rss_conf_pa); 2367 } 2368 2369#endif /* VMXNET3_RSS */ 2370 2371 /* intr settings */ 2372 devRead->intrConf.autoMask = adapter->intr.mask_mode == 2373 VMXNET3_IMM_AUTO; 2374 devRead->intrConf.numIntrs = adapter->intr.num_intrs; 2375 for (i = 0; i < adapter->intr.num_intrs; i++) 2376 devRead->intrConf.modLevels[i] = adapter->intr.mod_levels[i]; 2377 2378 devRead->intrConf.eventIntrIdx = adapter->intr.event_intr_idx; 2379 devRead->intrConf.intrCtrl |= cpu_to_le32(VMXNET3_IC_DISABLE_ALL); 2380 2381 /* rx filter settings */ 2382 devRead->rxFilterConf.rxMode = 0; 2383 vmxnet3_restore_vlan(adapter); 2384 vmxnet3_write_mac_addr(adapter, adapter->netdev->dev_addr); 2385 2386 /* the rest are already zeroed */ 2387} 2388 2389 2390int 2391vmxnet3_activate_dev(struct vmxnet3_adapter *adapter) 2392{ 2393 int err, i; 2394 u32 ret; 2395 unsigned long flags; 2396 2397 netdev_dbg(adapter->netdev, "%s: skb_buf_size %d, rx_buf_per_pkt %d," 2398 " ring sizes %u %u %u\n", adapter->netdev->name, 2399 adapter->skb_buf_size, adapter->rx_buf_per_pkt, 2400 adapter->tx_queue[0].tx_ring.size, 2401 adapter->rx_queue[0].rx_ring[0].size, 2402 adapter->rx_queue[0].rx_ring[1].size); 2403 2404 vmxnet3_tq_init_all(adapter); 2405 err = vmxnet3_rq_init_all(adapter); 2406 if (err) { 2407 netdev_err(adapter->netdev, 2408 "Failed to init rx queue error %d\n", err); 2409 goto rq_err; 2410 } 2411 2412 err = vmxnet3_request_irqs(adapter); 2413 if (err) { 2414 netdev_err(adapter->netdev, 2415 "Failed to setup irq for error %d\n", err); 2416 goto irq_err; 2417 } 2418 2419 vmxnet3_setup_driver_shared(adapter); 2420 2421 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAL, VMXNET3_GET_ADDR_LO( 2422 adapter->shared_pa)); 2423 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAH, VMXNET3_GET_ADDR_HI( 2424 adapter->shared_pa)); 2425 spin_lock_irqsave(&adapter->cmd_lock, flags); 2426 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 2427 VMXNET3_CMD_ACTIVATE_DEV); 2428 ret = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD); 2429 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 2430 2431 if (ret != 0) { 2432 netdev_err(adapter->netdev, 2433 "Failed to activate dev: error %u\n", ret); 2434 err = -EINVAL; 2435 goto activate_err; 2436 } 2437 2438 for (i = 0; i < adapter->num_rx_queues; i++) { 2439 VMXNET3_WRITE_BAR0_REG(adapter, 2440 VMXNET3_REG_RXPROD + i * VMXNET3_REG_ALIGN, 2441 adapter->rx_queue[i].rx_ring[0].next2fill); 2442 VMXNET3_WRITE_BAR0_REG(adapter, (VMXNET3_REG_RXPROD2 + 2443 (i * VMXNET3_REG_ALIGN)), 2444 adapter->rx_queue[i].rx_ring[1].next2fill); 2445 } 2446 2447 /* Apply the rx filter settins last. */ 2448 vmxnet3_set_mc(adapter->netdev); 2449 2450 /* 2451 * Check link state when first activating device. It will start the 2452 * tx queue if the link is up. 2453 */ 2454 vmxnet3_check_link(adapter, true); 2455 for (i = 0; i < adapter->num_rx_queues; i++) 2456 napi_enable(&adapter->rx_queue[i].napi); 2457 vmxnet3_enable_all_intrs(adapter); 2458 clear_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state); 2459 return 0; 2460 2461activate_err: 2462 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAL, 0); 2463 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAH, 0); 2464 vmxnet3_free_irqs(adapter); 2465irq_err: 2466rq_err: 2467 /* free up buffers we allocated */ 2468 vmxnet3_rq_cleanup_all(adapter); 2469 return err; 2470} 2471 2472 2473void 2474vmxnet3_reset_dev(struct vmxnet3_adapter *adapter) 2475{ 2476 unsigned long flags; 2477 spin_lock_irqsave(&adapter->cmd_lock, flags); 2478 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_RESET_DEV); 2479 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 2480} 2481 2482 2483int 2484vmxnet3_quiesce_dev(struct vmxnet3_adapter *adapter) 2485{ 2486 int i; 2487 unsigned long flags; 2488 if (test_and_set_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state)) 2489 return 0; 2490 2491 2492 spin_lock_irqsave(&adapter->cmd_lock, flags); 2493 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 2494 VMXNET3_CMD_QUIESCE_DEV); 2495 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 2496 vmxnet3_disable_all_intrs(adapter); 2497 2498 for (i = 0; i < adapter->num_rx_queues; i++) 2499 napi_disable(&adapter->rx_queue[i].napi); 2500 netif_tx_disable(adapter->netdev); 2501 adapter->link_speed = 0; 2502 netif_carrier_off(adapter->netdev); 2503 2504 vmxnet3_tq_cleanup_all(adapter); 2505 vmxnet3_rq_cleanup_all(adapter); 2506 vmxnet3_free_irqs(adapter); 2507 return 0; 2508} 2509 2510 2511static void 2512vmxnet3_write_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac) 2513{ 2514 u32 tmp; 2515 2516 tmp = *(u32 *)mac; 2517 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_MACL, tmp); 2518 2519 tmp = (mac[5] << 8) | mac[4]; 2520 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_MACH, tmp); 2521} 2522 2523 2524static int 2525vmxnet3_set_mac_addr(struct net_device *netdev, void *p) 2526{ 2527 struct sockaddr *addr = p; 2528 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 2529 2530 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); 2531 vmxnet3_write_mac_addr(adapter, addr->sa_data); 2532 2533 return 0; 2534} 2535 2536 2537/* ==================== initialization and cleanup routines ============ */ 2538 2539static int 2540vmxnet3_alloc_pci_resources(struct vmxnet3_adapter *adapter, bool *dma64) 2541{ 2542 int err; 2543 unsigned long mmio_start, mmio_len; 2544 struct pci_dev *pdev = adapter->pdev; 2545 2546 err = pci_enable_device(pdev); 2547 if (err) { 2548 dev_err(&pdev->dev, "Failed to enable adapter: error %d\n", err); 2549 return err; 2550 } 2551 2552 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) == 0) { 2553 if (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)) != 0) { 2554 dev_err(&pdev->dev, 2555 "pci_set_consistent_dma_mask failed\n"); 2556 err = -EIO; 2557 goto err_set_mask; 2558 } 2559 *dma64 = true; 2560 } else { 2561 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) { 2562 dev_err(&pdev->dev, 2563 "pci_set_dma_mask failed\n"); 2564 err = -EIO; 2565 goto err_set_mask; 2566 } 2567 *dma64 = false; 2568 } 2569 2570 err = pci_request_selected_regions(pdev, (1 << 2) - 1, 2571 vmxnet3_driver_name); 2572 if (err) { 2573 dev_err(&pdev->dev, 2574 "Failed to request region for adapter: error %d\n", err); 2575 goto err_set_mask; 2576 } 2577 2578 pci_set_master(pdev); 2579 2580 mmio_start = pci_resource_start(pdev, 0); 2581 mmio_len = pci_resource_len(pdev, 0); 2582 adapter->hw_addr0 = ioremap(mmio_start, mmio_len); 2583 if (!adapter->hw_addr0) { 2584 dev_err(&pdev->dev, "Failed to map bar0\n"); 2585 err = -EIO; 2586 goto err_ioremap; 2587 } 2588 2589 mmio_start = pci_resource_start(pdev, 1); 2590 mmio_len = pci_resource_len(pdev, 1); 2591 adapter->hw_addr1 = ioremap(mmio_start, mmio_len); 2592 if (!adapter->hw_addr1) { 2593 dev_err(&pdev->dev, "Failed to map bar1\n"); 2594 err = -EIO; 2595 goto err_bar1; 2596 } 2597 return 0; 2598 2599err_bar1: 2600 iounmap(adapter->hw_addr0); 2601err_ioremap: 2602 pci_release_selected_regions(pdev, (1 << 2) - 1); 2603err_set_mask: 2604 pci_disable_device(pdev); 2605 return err; 2606} 2607 2608 2609static void 2610vmxnet3_free_pci_resources(struct vmxnet3_adapter *adapter) 2611{ 2612 BUG_ON(!adapter->pdev); 2613 2614 iounmap(adapter->hw_addr0); 2615 iounmap(adapter->hw_addr1); 2616 pci_release_selected_regions(adapter->pdev, (1 << 2) - 1); 2617 pci_disable_device(adapter->pdev); 2618} 2619 2620 2621static void 2622vmxnet3_adjust_rx_ring_size(struct vmxnet3_adapter *adapter) 2623{ 2624 size_t sz, i, ring0_size, ring1_size, comp_size; 2625 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[0]; 2626 2627 2628 if (adapter->netdev->mtu <= VMXNET3_MAX_SKB_BUF_SIZE - 2629 VMXNET3_MAX_ETH_HDR_SIZE) { 2630 adapter->skb_buf_size = adapter->netdev->mtu + 2631 VMXNET3_MAX_ETH_HDR_SIZE; 2632 if (adapter->skb_buf_size < VMXNET3_MIN_T0_BUF_SIZE) 2633 adapter->skb_buf_size = VMXNET3_MIN_T0_BUF_SIZE; 2634 2635 adapter->rx_buf_per_pkt = 1; 2636 } else { 2637 adapter->skb_buf_size = VMXNET3_MAX_SKB_BUF_SIZE; 2638 sz = adapter->netdev->mtu - VMXNET3_MAX_SKB_BUF_SIZE + 2639 VMXNET3_MAX_ETH_HDR_SIZE; 2640 adapter->rx_buf_per_pkt = 1 + (sz + PAGE_SIZE - 1) / PAGE_SIZE; 2641 } 2642 2643 /* 2644 * for simplicity, force the ring0 size to be a multiple of 2645 * rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN 2646 */ 2647 sz = adapter->rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN; 2648 ring0_size = adapter->rx_queue[0].rx_ring[0].size; 2649 ring0_size = (ring0_size + sz - 1) / sz * sz; 2650 ring0_size = min_t(u32, ring0_size, VMXNET3_RX_RING_MAX_SIZE / 2651 sz * sz); 2652 ring1_size = adapter->rx_queue[0].rx_ring[1].size; 2653 ring1_size = (ring1_size + sz - 1) / sz * sz; 2654 ring1_size = min_t(u32, ring1_size, VMXNET3_RX_RING2_MAX_SIZE / 2655 sz * sz); 2656 comp_size = ring0_size + ring1_size; 2657 2658 for (i = 0; i < adapter->num_rx_queues; i++) { 2659 rq = &adapter->rx_queue[i]; 2660 rq->rx_ring[0].size = ring0_size; 2661 rq->rx_ring[1].size = ring1_size; 2662 rq->comp_ring.size = comp_size; 2663 } 2664} 2665 2666 2667int 2668vmxnet3_create_queues(struct vmxnet3_adapter *adapter, u32 tx_ring_size, 2669 u32 rx_ring_size, u32 rx_ring2_size) 2670{ 2671 int err = 0, i; 2672 2673 for (i = 0; i < adapter->num_tx_queues; i++) { 2674 struct vmxnet3_tx_queue *tq = &adapter->tx_queue[i]; 2675 tq->tx_ring.size = tx_ring_size; 2676 tq->data_ring.size = tx_ring_size; 2677 tq->comp_ring.size = tx_ring_size; 2678 tq->shared = &adapter->tqd_start[i].ctrl; 2679 tq->stopped = true; 2680 tq->adapter = adapter; 2681 tq->qid = i; 2682 err = vmxnet3_tq_create(tq, adapter); 2683 /* 2684 * Too late to change num_tx_queues. We cannot do away with 2685 * lesser number of queues than what we asked for 2686 */ 2687 if (err) 2688 goto queue_err; 2689 } 2690 2691 adapter->rx_queue[0].rx_ring[0].size = rx_ring_size; 2692 adapter->rx_queue[0].rx_ring[1].size = rx_ring2_size; 2693 vmxnet3_adjust_rx_ring_size(adapter); 2694 for (i = 0; i < adapter->num_rx_queues; i++) { 2695 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i]; 2696 /* qid and qid2 for rx queues will be assigned later when num 2697 * of rx queues is finalized after allocating intrs */ 2698 rq->shared = &adapter->rqd_start[i].ctrl; 2699 rq->adapter = adapter; 2700 err = vmxnet3_rq_create(rq, adapter); 2701 if (err) { 2702 if (i == 0) { 2703 netdev_err(adapter->netdev, 2704 "Could not allocate any rx queues. " 2705 "Aborting.\n"); 2706 goto queue_err; 2707 } else { 2708 netdev_info(adapter->netdev, 2709 "Number of rx queues changed " 2710 "to : %d.\n", i); 2711 adapter->num_rx_queues = i; 2712 err = 0; 2713 break; 2714 } 2715 } 2716 } 2717 return err; 2718queue_err: 2719 vmxnet3_tq_destroy_all(adapter); 2720 return err; 2721} 2722 2723static int 2724vmxnet3_open(struct net_device *netdev) 2725{ 2726 struct vmxnet3_adapter *adapter; 2727 int err, i; 2728 2729 adapter = netdev_priv(netdev); 2730 2731 for (i = 0; i < adapter->num_tx_queues; i++) 2732 spin_lock_init(&adapter->tx_queue[i].tx_lock); 2733 2734 err = vmxnet3_create_queues(adapter, adapter->tx_ring_size, 2735 adapter->rx_ring_size, 2736 adapter->rx_ring2_size); 2737 if (err) 2738 goto queue_err; 2739 2740 err = vmxnet3_activate_dev(adapter); 2741 if (err) 2742 goto activate_err; 2743 2744 return 0; 2745 2746activate_err: 2747 vmxnet3_rq_destroy_all(adapter); 2748 vmxnet3_tq_destroy_all(adapter); 2749queue_err: 2750 return err; 2751} 2752 2753 2754static int 2755vmxnet3_close(struct net_device *netdev) 2756{ 2757 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 2758 2759 /* 2760 * Reset_work may be in the middle of resetting the device, wait for its 2761 * completion. 2762 */ 2763 while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state)) 2764 msleep(1); 2765 2766 vmxnet3_quiesce_dev(adapter); 2767 2768 vmxnet3_rq_destroy_all(adapter); 2769 vmxnet3_tq_destroy_all(adapter); 2770 2771 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state); 2772 2773 2774 return 0; 2775} 2776 2777 2778void 2779vmxnet3_force_close(struct vmxnet3_adapter *adapter) 2780{ 2781 int i; 2782 2783 /* 2784 * we must clear VMXNET3_STATE_BIT_RESETTING, otherwise 2785 * vmxnet3_close() will deadlock. 2786 */ 2787 BUG_ON(test_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state)); 2788 2789 /* we need to enable NAPI, otherwise dev_close will deadlock */ 2790 for (i = 0; i < adapter->num_rx_queues; i++) 2791 napi_enable(&adapter->rx_queue[i].napi); 2792 dev_close(adapter->netdev); 2793} 2794 2795 2796static int 2797vmxnet3_change_mtu(struct net_device *netdev, int new_mtu) 2798{ 2799 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 2800 int err = 0; 2801 2802 if (new_mtu < VMXNET3_MIN_MTU || new_mtu > VMXNET3_MAX_MTU) 2803 return -EINVAL; 2804 2805 netdev->mtu = new_mtu; 2806 2807 /* 2808 * Reset_work may be in the middle of resetting the device, wait for its 2809 * completion. 2810 */ 2811 while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state)) 2812 msleep(1); 2813 2814 if (netif_running(netdev)) { 2815 vmxnet3_quiesce_dev(adapter); 2816 vmxnet3_reset_dev(adapter); 2817 2818 /* we need to re-create the rx queue based on the new mtu */ 2819 vmxnet3_rq_destroy_all(adapter); 2820 vmxnet3_adjust_rx_ring_size(adapter); 2821 err = vmxnet3_rq_create_all(adapter); 2822 if (err) { 2823 netdev_err(netdev, 2824 "failed to re-create rx queues, " 2825 " error %d. Closing it.\n", err); 2826 goto out; 2827 } 2828 2829 err = vmxnet3_activate_dev(adapter); 2830 if (err) { 2831 netdev_err(netdev, 2832 "failed to re-activate, error %d. " 2833 "Closing it\n", err); 2834 goto out; 2835 } 2836 } 2837 2838out: 2839 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state); 2840 if (err) 2841 vmxnet3_force_close(adapter); 2842 2843 return err; 2844} 2845 2846 2847static void 2848vmxnet3_declare_features(struct vmxnet3_adapter *adapter, bool dma64) 2849{ 2850 struct net_device *netdev = adapter->netdev; 2851 2852 netdev->hw_features = NETIF_F_SG | NETIF_F_RXCSUM | 2853 NETIF_F_HW_CSUM | NETIF_F_HW_VLAN_CTAG_TX | 2854 NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_TSO | NETIF_F_TSO6 | 2855 NETIF_F_LRO; 2856 if (dma64) 2857 netdev->hw_features |= NETIF_F_HIGHDMA; 2858 netdev->vlan_features = netdev->hw_features & 2859 ~(NETIF_F_HW_VLAN_CTAG_TX | 2860 NETIF_F_HW_VLAN_CTAG_RX); 2861 netdev->features = netdev->hw_features | NETIF_F_HW_VLAN_CTAG_FILTER; 2862} 2863 2864 2865static void 2866vmxnet3_read_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac) 2867{ 2868 u32 tmp; 2869 2870 tmp = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_MACL); 2871 *(u32 *)mac = tmp; 2872 2873 tmp = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_MACH); 2874 mac[4] = tmp & 0xff; 2875 mac[5] = (tmp >> 8) & 0xff; 2876} 2877 2878#ifdef CONFIG_PCI_MSI 2879 2880/* 2881 * Enable MSIx vectors. 2882 * Returns : 2883 * VMXNET3_LINUX_MIN_MSIX_VECT when only minimum number of vectors required 2884 * were enabled. 2885 * number of vectors which were enabled otherwise (this number is greater 2886 * than VMXNET3_LINUX_MIN_MSIX_VECT) 2887 */ 2888 2889static int 2890vmxnet3_acquire_msix_vectors(struct vmxnet3_adapter *adapter, int nvec) 2891{ 2892 int ret = pci_enable_msix_range(adapter->pdev, 2893 adapter->intr.msix_entries, nvec, nvec); 2894 2895 if (ret == -ENOSPC && nvec > VMXNET3_LINUX_MIN_MSIX_VECT) { 2896 dev_err(&adapter->netdev->dev, 2897 "Failed to enable %d MSI-X, trying %d\n", 2898 nvec, VMXNET3_LINUX_MIN_MSIX_VECT); 2899 2900 ret = pci_enable_msix_range(adapter->pdev, 2901 adapter->intr.msix_entries, 2902 VMXNET3_LINUX_MIN_MSIX_VECT, 2903 VMXNET3_LINUX_MIN_MSIX_VECT); 2904 } 2905 2906 if (ret < 0) { 2907 dev_err(&adapter->netdev->dev, 2908 "Failed to enable MSI-X, error: %d\n", ret); 2909 } 2910 2911 return ret; 2912} 2913 2914 2915#endif /* CONFIG_PCI_MSI */ 2916 2917static void 2918vmxnet3_alloc_intr_resources(struct vmxnet3_adapter *adapter) 2919{ 2920 u32 cfg; 2921 unsigned long flags; 2922 2923 /* intr settings */ 2924 spin_lock_irqsave(&adapter->cmd_lock, flags); 2925 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 2926 VMXNET3_CMD_GET_CONF_INTR); 2927 cfg = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD); 2928 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 2929 adapter->intr.type = cfg & 0x3; 2930 adapter->intr.mask_mode = (cfg >> 2) & 0x3; 2931 2932 if (adapter->intr.type == VMXNET3_IT_AUTO) { 2933 adapter->intr.type = VMXNET3_IT_MSIX; 2934 } 2935 2936#ifdef CONFIG_PCI_MSI 2937 if (adapter->intr.type == VMXNET3_IT_MSIX) { 2938 int i, nvec; 2939 2940 nvec = adapter->share_intr == VMXNET3_INTR_TXSHARE ? 2941 1 : adapter->num_tx_queues; 2942 nvec += adapter->share_intr == VMXNET3_INTR_BUDDYSHARE ? 2943 0 : adapter->num_rx_queues; 2944 nvec += 1; /* for link event */ 2945 nvec = nvec > VMXNET3_LINUX_MIN_MSIX_VECT ? 2946 nvec : VMXNET3_LINUX_MIN_MSIX_VECT; 2947 2948 for (i = 0; i < nvec; i++) 2949 adapter->intr.msix_entries[i].entry = i; 2950 2951 nvec = vmxnet3_acquire_msix_vectors(adapter, nvec); 2952 if (nvec < 0) 2953 goto msix_err; 2954 2955 /* If we cannot allocate one MSIx vector per queue 2956 * then limit the number of rx queues to 1 2957 */ 2958 if (nvec == VMXNET3_LINUX_MIN_MSIX_VECT) { 2959 if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE 2960 || adapter->num_rx_queues != 1) { 2961 adapter->share_intr = VMXNET3_INTR_TXSHARE; 2962 netdev_err(adapter->netdev, 2963 "Number of rx queues : 1\n"); 2964 adapter->num_rx_queues = 1; 2965 } 2966 } 2967 2968 adapter->intr.num_intrs = nvec; 2969 return; 2970 2971msix_err: 2972 /* If we cannot allocate MSIx vectors use only one rx queue */ 2973 dev_info(&adapter->pdev->dev, 2974 "Failed to enable MSI-X, error %d. " 2975 "Limiting #rx queues to 1, try MSI.\n", nvec); 2976 2977 adapter->intr.type = VMXNET3_IT_MSI; 2978 } 2979 2980 if (adapter->intr.type == VMXNET3_IT_MSI) { 2981 if (!pci_enable_msi(adapter->pdev)) { 2982 adapter->num_rx_queues = 1; 2983 adapter->intr.num_intrs = 1; 2984 return; 2985 } 2986 } 2987#endif /* CONFIG_PCI_MSI */ 2988 2989 adapter->num_rx_queues = 1; 2990 dev_info(&adapter->netdev->dev, 2991 "Using INTx interrupt, #Rx queues: 1.\n"); 2992 adapter->intr.type = VMXNET3_IT_INTX; 2993 2994 /* INT-X related setting */ 2995 adapter->intr.num_intrs = 1; 2996} 2997 2998 2999static void 3000vmxnet3_free_intr_resources(struct vmxnet3_adapter *adapter) 3001{ 3002 if (adapter->intr.type == VMXNET3_IT_MSIX) 3003 pci_disable_msix(adapter->pdev); 3004 else if (adapter->intr.type == VMXNET3_IT_MSI) 3005 pci_disable_msi(adapter->pdev); 3006 else 3007 BUG_ON(adapter->intr.type != VMXNET3_IT_INTX); 3008} 3009 3010 3011static void 3012vmxnet3_tx_timeout(struct net_device *netdev) 3013{ 3014 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 3015 adapter->tx_timeout_count++; 3016 3017 netdev_err(adapter->netdev, "tx hang\n"); 3018 schedule_work(&adapter->work); 3019 netif_wake_queue(adapter->netdev); 3020} 3021 3022 3023static void 3024vmxnet3_reset_work(struct work_struct *data) 3025{ 3026 struct vmxnet3_adapter *adapter; 3027 3028 adapter = container_of(data, struct vmxnet3_adapter, work); 3029 3030 /* if another thread is resetting the device, no need to proceed */ 3031 if (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state)) 3032 return; 3033 3034 /* if the device is closed, we must leave it alone */ 3035 rtnl_lock(); 3036 if (netif_running(adapter->netdev)) { 3037 netdev_notice(adapter->netdev, "resetting\n"); 3038 vmxnet3_quiesce_dev(adapter); 3039 vmxnet3_reset_dev(adapter); 3040 vmxnet3_activate_dev(adapter); 3041 } else { 3042 netdev_info(adapter->netdev, "already closed\n"); 3043 } 3044 rtnl_unlock(); 3045 3046 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state); 3047} 3048 3049 3050static int 3051vmxnet3_probe_device(struct pci_dev *pdev, 3052 const struct pci_device_id *id) 3053{ 3054 static const struct net_device_ops vmxnet3_netdev_ops = { 3055 .ndo_open = vmxnet3_open, 3056 .ndo_stop = vmxnet3_close, 3057 .ndo_start_xmit = vmxnet3_xmit_frame, 3058 .ndo_set_mac_address = vmxnet3_set_mac_addr, 3059 .ndo_change_mtu = vmxnet3_change_mtu, 3060 .ndo_set_features = vmxnet3_set_features, 3061 .ndo_get_stats64 = vmxnet3_get_stats64, 3062 .ndo_tx_timeout = vmxnet3_tx_timeout, 3063 .ndo_set_rx_mode = vmxnet3_set_mc, 3064 .ndo_vlan_rx_add_vid = vmxnet3_vlan_rx_add_vid, 3065 .ndo_vlan_rx_kill_vid = vmxnet3_vlan_rx_kill_vid, 3066#ifdef CONFIG_NET_POLL_CONTROLLER 3067 .ndo_poll_controller = vmxnet3_netpoll, 3068#endif 3069 }; 3070 int err; 3071 bool dma64 = false; /* stupid gcc */ 3072 u32 ver; 3073 struct net_device *netdev; 3074 struct vmxnet3_adapter *adapter; 3075 u8 mac[ETH_ALEN]; 3076 int size; 3077 int num_tx_queues; 3078 int num_rx_queues; 3079 3080 if (!pci_msi_enabled()) 3081 enable_mq = 0; 3082 3083#ifdef VMXNET3_RSS 3084 if (enable_mq) 3085 num_rx_queues = min(VMXNET3_DEVICE_MAX_RX_QUEUES, 3086 (int)num_online_cpus()); 3087 else 3088#endif 3089 num_rx_queues = 1; 3090 num_rx_queues = rounddown_pow_of_two(num_rx_queues); 3091 3092 if (enable_mq) 3093 num_tx_queues = min(VMXNET3_DEVICE_MAX_TX_QUEUES, 3094 (int)num_online_cpus()); 3095 else 3096 num_tx_queues = 1; 3097 3098 num_tx_queues = rounddown_pow_of_two(num_tx_queues); 3099 netdev = alloc_etherdev_mq(sizeof(struct vmxnet3_adapter), 3100 max(num_tx_queues, num_rx_queues)); 3101 dev_info(&pdev->dev, 3102 "# of Tx queues : %d, # of Rx queues : %d\n", 3103 num_tx_queues, num_rx_queues); 3104 3105 if (!netdev) 3106 return -ENOMEM; 3107 3108 pci_set_drvdata(pdev, netdev); 3109 adapter = netdev_priv(netdev); 3110 adapter->netdev = netdev; 3111 adapter->pdev = pdev; 3112 3113 adapter->tx_ring_size = VMXNET3_DEF_TX_RING_SIZE; 3114 adapter->rx_ring_size = VMXNET3_DEF_RX_RING_SIZE; 3115 adapter->rx_ring2_size = VMXNET3_DEF_RX_RING2_SIZE; 3116 3117 spin_lock_init(&adapter->cmd_lock); 3118 adapter->adapter_pa = dma_map_single(&adapter->pdev->dev, adapter, 3119 sizeof(struct vmxnet3_adapter), 3120 PCI_DMA_TODEVICE); 3121 if (dma_mapping_error(&adapter->pdev->dev, adapter->adapter_pa)) { 3122 dev_err(&pdev->dev, "Failed to map dma\n"); 3123 err = -EFAULT; 3124 goto err_dma_map; 3125 } 3126 adapter->shared = dma_alloc_coherent( 3127 &adapter->pdev->dev, 3128 sizeof(struct Vmxnet3_DriverShared), 3129 &adapter->shared_pa, GFP_KERNEL); 3130 if (!adapter->shared) { 3131 dev_err(&pdev->dev, "Failed to allocate memory\n"); 3132 err = -ENOMEM; 3133 goto err_alloc_shared; 3134 } 3135 3136 adapter->num_rx_queues = num_rx_queues; 3137 adapter->num_tx_queues = num_tx_queues; 3138 adapter->rx_buf_per_pkt = 1; 3139 3140 size = sizeof(struct Vmxnet3_TxQueueDesc) * adapter->num_tx_queues; 3141 size += sizeof(struct Vmxnet3_RxQueueDesc) * adapter->num_rx_queues; 3142 adapter->tqd_start = dma_alloc_coherent(&adapter->pdev->dev, size, 3143 &adapter->queue_desc_pa, 3144 GFP_KERNEL); 3145 3146 if (!adapter->tqd_start) { 3147 dev_err(&pdev->dev, "Failed to allocate memory\n"); 3148 err = -ENOMEM; 3149 goto err_alloc_queue_desc; 3150 } 3151 adapter->rqd_start = (struct Vmxnet3_RxQueueDesc *)(adapter->tqd_start + 3152 adapter->num_tx_queues); 3153 3154 adapter->pm_conf = dma_alloc_coherent(&adapter->pdev->dev, 3155 sizeof(struct Vmxnet3_PMConf), 3156 &adapter->pm_conf_pa, 3157 GFP_KERNEL); 3158 if (adapter->pm_conf == NULL) { 3159 err = -ENOMEM; 3160 goto err_alloc_pm; 3161 } 3162 3163#ifdef VMXNET3_RSS 3164 3165 adapter->rss_conf = dma_alloc_coherent(&adapter->pdev->dev, 3166 sizeof(struct UPT1_RSSConf), 3167 &adapter->rss_conf_pa, 3168 GFP_KERNEL); 3169 if (adapter->rss_conf == NULL) { 3170 err = -ENOMEM; 3171 goto err_alloc_rss; 3172 } 3173#endif /* VMXNET3_RSS */ 3174 3175 err = vmxnet3_alloc_pci_resources(adapter, &dma64); 3176 if (err < 0) 3177 goto err_alloc_pci; 3178 3179 ver = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_VRRS); 3180 if (ver & 2) { 3181 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_VRRS, 2); 3182 adapter->version = 2; 3183 } else if (ver & 1) { 3184 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_VRRS, 1); 3185 adapter->version = 1; 3186 } else { 3187 dev_err(&pdev->dev, 3188 "Incompatible h/w version (0x%x) for adapter\n", ver); 3189 err = -EBUSY; 3190 goto err_ver; 3191 } 3192 dev_dbg(&pdev->dev, "Using device version %d\n", adapter->version); 3193 3194 ver = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_UVRS); 3195 if (ver & 1) { 3196 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_UVRS, 1); 3197 } else { 3198 dev_err(&pdev->dev, 3199 "Incompatible upt version (0x%x) for adapter\n", ver); 3200 err = -EBUSY; 3201 goto err_ver; 3202 } 3203 3204 SET_NETDEV_DEV(netdev, &pdev->dev); 3205 vmxnet3_declare_features(adapter, dma64); 3206 3207 if (adapter->num_tx_queues == adapter->num_rx_queues) 3208 adapter->share_intr = VMXNET3_INTR_BUDDYSHARE; 3209 else 3210 adapter->share_intr = VMXNET3_INTR_DONTSHARE; 3211 3212 vmxnet3_alloc_intr_resources(adapter); 3213 3214#ifdef VMXNET3_RSS 3215 if (adapter->num_rx_queues > 1 && 3216 adapter->intr.type == VMXNET3_IT_MSIX) { 3217 adapter->rss = true; 3218 netdev->hw_features |= NETIF_F_RXHASH; 3219 netdev->features |= NETIF_F_RXHASH; 3220 dev_dbg(&pdev->dev, "RSS is enabled.\n"); 3221 } else { 3222 adapter->rss = false; 3223 } 3224#endif 3225 3226 vmxnet3_read_mac_addr(adapter, mac); 3227 memcpy(netdev->dev_addr, mac, netdev->addr_len); 3228 3229 netdev->netdev_ops = &vmxnet3_netdev_ops; 3230 vmxnet3_set_ethtool_ops(netdev); 3231 netdev->watchdog_timeo = 5 * HZ; 3232 3233 INIT_WORK(&adapter->work, vmxnet3_reset_work); 3234 set_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state); 3235 3236 if (adapter->intr.type == VMXNET3_IT_MSIX) { 3237 int i; 3238 for (i = 0; i < adapter->num_rx_queues; i++) { 3239 netif_napi_add(adapter->netdev, 3240 &adapter->rx_queue[i].napi, 3241 vmxnet3_poll_rx_only, 64); 3242 } 3243 } else { 3244 netif_napi_add(adapter->netdev, &adapter->rx_queue[0].napi, 3245 vmxnet3_poll, 64); 3246 } 3247 3248 netif_set_real_num_tx_queues(adapter->netdev, adapter->num_tx_queues); 3249 netif_set_real_num_rx_queues(adapter->netdev, adapter->num_rx_queues); 3250 3251 netif_carrier_off(netdev); 3252 err = register_netdev(netdev); 3253 3254 if (err) { 3255 dev_err(&pdev->dev, "Failed to register adapter\n"); 3256 goto err_register; 3257 } 3258 3259 vmxnet3_check_link(adapter, false); 3260 return 0; 3261 3262err_register: 3263 vmxnet3_free_intr_resources(adapter); 3264err_ver: 3265 vmxnet3_free_pci_resources(adapter); 3266err_alloc_pci: 3267#ifdef VMXNET3_RSS 3268 dma_free_coherent(&adapter->pdev->dev, sizeof(struct UPT1_RSSConf), 3269 adapter->rss_conf, adapter->rss_conf_pa); 3270err_alloc_rss: 3271#endif 3272 dma_free_coherent(&adapter->pdev->dev, sizeof(struct Vmxnet3_PMConf), 3273 adapter->pm_conf, adapter->pm_conf_pa); 3274err_alloc_pm: 3275 dma_free_coherent(&adapter->pdev->dev, size, adapter->tqd_start, 3276 adapter->queue_desc_pa); 3277err_alloc_queue_desc: 3278 dma_free_coherent(&adapter->pdev->dev, 3279 sizeof(struct Vmxnet3_DriverShared), 3280 adapter->shared, adapter->shared_pa); 3281err_alloc_shared: 3282 dma_unmap_single(&adapter->pdev->dev, adapter->adapter_pa, 3283 sizeof(struct vmxnet3_adapter), PCI_DMA_TODEVICE); 3284err_dma_map: 3285 free_netdev(netdev); 3286 return err; 3287} 3288 3289 3290static void 3291vmxnet3_remove_device(struct pci_dev *pdev) 3292{ 3293 struct net_device *netdev = pci_get_drvdata(pdev); 3294 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 3295 int size = 0; 3296 int num_rx_queues; 3297 3298#ifdef VMXNET3_RSS 3299 if (enable_mq) 3300 num_rx_queues = min(VMXNET3_DEVICE_MAX_RX_QUEUES, 3301 (int)num_online_cpus()); 3302 else 3303#endif 3304 num_rx_queues = 1; 3305 num_rx_queues = rounddown_pow_of_two(num_rx_queues); 3306 3307 cancel_work_sync(&adapter->work); 3308 3309 unregister_netdev(netdev); 3310 3311 vmxnet3_free_intr_resources(adapter); 3312 vmxnet3_free_pci_resources(adapter); 3313#ifdef VMXNET3_RSS 3314 dma_free_coherent(&adapter->pdev->dev, sizeof(struct UPT1_RSSConf), 3315 adapter->rss_conf, adapter->rss_conf_pa); 3316#endif 3317 dma_free_coherent(&adapter->pdev->dev, sizeof(struct Vmxnet3_PMConf), 3318 adapter->pm_conf, adapter->pm_conf_pa); 3319 3320 size = sizeof(struct Vmxnet3_TxQueueDesc) * adapter->num_tx_queues; 3321 size += sizeof(struct Vmxnet3_RxQueueDesc) * num_rx_queues; 3322 dma_free_coherent(&adapter->pdev->dev, size, adapter->tqd_start, 3323 adapter->queue_desc_pa); 3324 dma_free_coherent(&adapter->pdev->dev, 3325 sizeof(struct Vmxnet3_DriverShared), 3326 adapter->shared, adapter->shared_pa); 3327 dma_unmap_single(&adapter->pdev->dev, adapter->adapter_pa, 3328 sizeof(struct vmxnet3_adapter), PCI_DMA_TODEVICE); 3329 free_netdev(netdev); 3330} 3331 3332static void vmxnet3_shutdown_device(struct pci_dev *pdev) 3333{ 3334 struct net_device *netdev = pci_get_drvdata(pdev); 3335 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 3336 unsigned long flags; 3337 3338 /* Reset_work may be in the middle of resetting the device, wait for its 3339 * completion. 3340 */ 3341 while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state)) 3342 msleep(1); 3343 3344 if (test_and_set_bit(VMXNET3_STATE_BIT_QUIESCED, 3345 &adapter->state)) { 3346 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state); 3347 return; 3348 } 3349 spin_lock_irqsave(&adapter->cmd_lock, flags); 3350 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 3351 VMXNET3_CMD_QUIESCE_DEV); 3352 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 3353 vmxnet3_disable_all_intrs(adapter); 3354 3355 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state); 3356} 3357 3358 3359#ifdef CONFIG_PM 3360 3361static int 3362vmxnet3_suspend(struct device *device) 3363{ 3364 struct pci_dev *pdev = to_pci_dev(device); 3365 struct net_device *netdev = pci_get_drvdata(pdev); 3366 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 3367 struct Vmxnet3_PMConf *pmConf; 3368 struct ethhdr *ehdr; 3369 struct arphdr *ahdr; 3370 u8 *arpreq; 3371 struct in_device *in_dev; 3372 struct in_ifaddr *ifa; 3373 unsigned long flags; 3374 int i = 0; 3375 3376 if (!netif_running(netdev)) 3377 return 0; 3378 3379 for (i = 0; i < adapter->num_rx_queues; i++) 3380 napi_disable(&adapter->rx_queue[i].napi); 3381 3382 vmxnet3_disable_all_intrs(adapter); 3383 vmxnet3_free_irqs(adapter); 3384 vmxnet3_free_intr_resources(adapter); 3385 3386 netif_device_detach(netdev); 3387 netif_tx_stop_all_queues(netdev); 3388 3389 /* Create wake-up filters. */ 3390 pmConf = adapter->pm_conf; 3391 memset(pmConf, 0, sizeof(*pmConf)); 3392 3393 if (adapter->wol & WAKE_UCAST) { 3394 pmConf->filters[i].patternSize = ETH_ALEN; 3395 pmConf->filters[i].maskSize = 1; 3396 memcpy(pmConf->filters[i].pattern, netdev->dev_addr, ETH_ALEN); 3397 pmConf->filters[i].mask[0] = 0x3F; /* LSB ETH_ALEN bits */ 3398 3399 pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_FILTER; 3400 i++; 3401 } 3402 3403 if (adapter->wol & WAKE_ARP) { 3404 in_dev = in_dev_get(netdev); 3405 if (!in_dev) 3406 goto skip_arp; 3407 3408 ifa = (struct in_ifaddr *)in_dev->ifa_list; 3409 if (!ifa) 3410 goto skip_arp; 3411 3412 pmConf->filters[i].patternSize = ETH_HLEN + /* Ethernet header*/ 3413 sizeof(struct arphdr) + /* ARP header */ 3414 2 * ETH_ALEN + /* 2 Ethernet addresses*/ 3415 2 * sizeof(u32); /*2 IPv4 addresses */ 3416 pmConf->filters[i].maskSize = 3417 (pmConf->filters[i].patternSize - 1) / 8 + 1; 3418 3419 /* ETH_P_ARP in Ethernet header. */ 3420 ehdr = (struct ethhdr *)pmConf->filters[i].pattern; 3421 ehdr->h_proto = htons(ETH_P_ARP); 3422 3423 /* ARPOP_REQUEST in ARP header. */ 3424 ahdr = (struct arphdr *)&pmConf->filters[i].pattern[ETH_HLEN]; 3425 ahdr->ar_op = htons(ARPOP_REQUEST); 3426 arpreq = (u8 *)(ahdr + 1); 3427 3428 /* The Unicast IPv4 address in 'tip' field. */ 3429 arpreq += 2 * ETH_ALEN + sizeof(u32); 3430 *(u32 *)arpreq = ifa->ifa_address; 3431 3432 /* The mask for the relevant bits. */ 3433 pmConf->filters[i].mask[0] = 0x00; 3434 pmConf->filters[i].mask[1] = 0x30; /* ETH_P_ARP */ 3435 pmConf->filters[i].mask[2] = 0x30; /* ARPOP_REQUEST */ 3436 pmConf->filters[i].mask[3] = 0x00; 3437 pmConf->filters[i].mask[4] = 0xC0; /* IPv4 TIP */ 3438 pmConf->filters[i].mask[5] = 0x03; /* IPv4 TIP */ 3439 in_dev_put(in_dev); 3440 3441 pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_FILTER; 3442 i++; 3443 } 3444 3445skip_arp: 3446 if (adapter->wol & WAKE_MAGIC) 3447 pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_MAGIC; 3448 3449 pmConf->numFilters = i; 3450 3451 adapter->shared->devRead.pmConfDesc.confVer = cpu_to_le32(1); 3452 adapter->shared->devRead.pmConfDesc.confLen = cpu_to_le32(sizeof( 3453 *pmConf)); 3454 adapter->shared->devRead.pmConfDesc.confPA = 3455 cpu_to_le64(adapter->pm_conf_pa); 3456 3457 spin_lock_irqsave(&adapter->cmd_lock, flags); 3458 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 3459 VMXNET3_CMD_UPDATE_PMCFG); 3460 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 3461 3462 pci_save_state(pdev); 3463 pci_enable_wake(pdev, pci_choose_state(pdev, PMSG_SUSPEND), 3464 adapter->wol); 3465 pci_disable_device(pdev); 3466 pci_set_power_state(pdev, pci_choose_state(pdev, PMSG_SUSPEND)); 3467 3468 return 0; 3469} 3470 3471 3472static int 3473vmxnet3_resume(struct device *device) 3474{ 3475 int err; 3476 unsigned long flags; 3477 struct pci_dev *pdev = to_pci_dev(device); 3478 struct net_device *netdev = pci_get_drvdata(pdev); 3479 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 3480 3481 if (!netif_running(netdev)) 3482 return 0; 3483 3484 pci_set_power_state(pdev, PCI_D0); 3485 pci_restore_state(pdev); 3486 err = pci_enable_device_mem(pdev); 3487 if (err != 0) 3488 return err; 3489 3490 pci_enable_wake(pdev, PCI_D0, 0); 3491 3492 vmxnet3_alloc_intr_resources(adapter); 3493 3494 /* During hibernate and suspend, device has to be reinitialized as the 3495 * device state need not be preserved. 3496 */ 3497 3498 /* Need not check adapter state as other reset tasks cannot run during 3499 * device resume. 3500 */ 3501 spin_lock_irqsave(&adapter->cmd_lock, flags); 3502 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 3503 VMXNET3_CMD_QUIESCE_DEV); 3504 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 3505 vmxnet3_tq_cleanup_all(adapter); 3506 vmxnet3_rq_cleanup_all(adapter); 3507 3508 vmxnet3_reset_dev(adapter); 3509 err = vmxnet3_activate_dev(adapter); 3510 if (err != 0) { 3511 netdev_err(netdev, 3512 "failed to re-activate on resume, error: %d", err); 3513 vmxnet3_force_close(adapter); 3514 return err; 3515 } 3516 netif_device_attach(netdev); 3517 3518 return 0; 3519} 3520 3521static const struct dev_pm_ops vmxnet3_pm_ops = { 3522 .suspend = vmxnet3_suspend, 3523 .resume = vmxnet3_resume, 3524 .freeze = vmxnet3_suspend, 3525 .restore = vmxnet3_resume, 3526}; 3527#endif 3528 3529static struct pci_driver vmxnet3_driver = { 3530 .name = vmxnet3_driver_name, 3531 .id_table = vmxnet3_pciid_table, 3532 .probe = vmxnet3_probe_device, 3533 .remove = vmxnet3_remove_device, 3534 .shutdown = vmxnet3_shutdown_device, 3535#ifdef CONFIG_PM 3536 .driver.pm = &vmxnet3_pm_ops, 3537#endif 3538}; 3539 3540 3541static int __init 3542vmxnet3_init_module(void) 3543{ 3544 pr_info("%s - version %s\n", VMXNET3_DRIVER_DESC, 3545 VMXNET3_DRIVER_VERSION_REPORT); 3546 return pci_register_driver(&vmxnet3_driver); 3547} 3548 3549module_init(vmxnet3_init_module); 3550 3551 3552static void 3553vmxnet3_exit_module(void) 3554{ 3555 pci_unregister_driver(&vmxnet3_driver); 3556} 3557 3558module_exit(vmxnet3_exit_module); 3559 3560MODULE_AUTHOR("VMware, Inc."); 3561MODULE_DESCRIPTION(VMXNET3_DRIVER_DESC); 3562MODULE_LICENSE("GPL v2"); 3563MODULE_VERSION(VMXNET3_DRIVER_VERSION_STRING); 3564