1 /* 2 * Linux driver for VMware's vmxnet3 ethernet NIC. 3 * 4 * Copyright (C) 2008-2022, 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: 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 32 char 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 */ 39 static const struct pci_device_id vmxnet3_pciid_table[] = { 40 {PCI_VDEVICE(VMWARE, PCI_DEVICE_ID_VMWARE_VMXNET3)}, 41 {0} 42 }; 43 44 MODULE_DEVICE_TABLE(pci, vmxnet3_pciid_table); 45 46 static int enable_mq = 1; 47 48 static void 49 vmxnet3_write_mac_addr(struct vmxnet3_adapter *adapter, const u8 *mac); 50 51 /* 52 * Enable/Disable the given intr 53 */ 54 static void 55 vmxnet3_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 61 static void 62 vmxnet3_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 */ 71 static void 72 vmxnet3_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 if (!VMXNET3_VERSION_GE_6(adapter) || 79 !adapter->queuesExtEnabled) { 80 adapter->shared->devRead.intrConf.intrCtrl &= 81 cpu_to_le32(~VMXNET3_IC_DISABLE_ALL); 82 } else { 83 adapter->shared->devReadExt.intrConfExt.intrCtrl &= 84 cpu_to_le32(~VMXNET3_IC_DISABLE_ALL); 85 } 86 } 87 88 89 static void 90 vmxnet3_disable_all_intrs(struct vmxnet3_adapter *adapter) 91 { 92 int i; 93 94 if (!VMXNET3_VERSION_GE_6(adapter) || 95 !adapter->queuesExtEnabled) { 96 adapter->shared->devRead.intrConf.intrCtrl |= 97 cpu_to_le32(VMXNET3_IC_DISABLE_ALL); 98 } else { 99 adapter->shared->devReadExt.intrConfExt.intrCtrl |= 100 cpu_to_le32(VMXNET3_IC_DISABLE_ALL); 101 } 102 for (i = 0; i < adapter->intr.num_intrs; i++) 103 vmxnet3_disable_intr(adapter, i); 104 } 105 106 107 static void 108 vmxnet3_ack_events(struct vmxnet3_adapter *adapter, u32 events) 109 { 110 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_ECR, events); 111 } 112 113 114 static bool 115 vmxnet3_tq_stopped(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter) 116 { 117 return tq->stopped; 118 } 119 120 121 static void 122 vmxnet3_tq_start(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter) 123 { 124 tq->stopped = false; 125 netif_start_subqueue(adapter->netdev, tq - adapter->tx_queue); 126 } 127 128 129 static void 130 vmxnet3_tq_wake(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter) 131 { 132 tq->stopped = false; 133 netif_wake_subqueue(adapter->netdev, (tq - adapter->tx_queue)); 134 } 135 136 137 static void 138 vmxnet3_tq_stop(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter) 139 { 140 tq->stopped = true; 141 tq->num_stop++; 142 netif_stop_subqueue(adapter->netdev, (tq - adapter->tx_queue)); 143 } 144 145 /* Check if capability is supported by UPT device or 146 * UPT is even requested 147 */ 148 bool 149 vmxnet3_check_ptcapability(u32 cap_supported, u32 cap) 150 { 151 if (cap_supported & (1UL << VMXNET3_DCR_ERROR) || 152 cap_supported & (1UL << cap)) { 153 return true; 154 } 155 156 return false; 157 } 158 159 160 /* 161 * Check the link state. This may start or stop the tx queue. 162 */ 163 static void 164 vmxnet3_check_link(struct vmxnet3_adapter *adapter, bool affectTxQueue) 165 { 166 u32 ret; 167 int i; 168 unsigned long flags; 169 170 spin_lock_irqsave(&adapter->cmd_lock, flags); 171 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_GET_LINK); 172 ret = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD); 173 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 174 175 adapter->link_speed = ret >> 16; 176 if (ret & 1) { /* Link is up. */ 177 netdev_info(adapter->netdev, "NIC Link is Up %d Mbps\n", 178 adapter->link_speed); 179 netif_carrier_on(adapter->netdev); 180 181 if (affectTxQueue) { 182 for (i = 0; i < adapter->num_tx_queues; i++) 183 vmxnet3_tq_start(&adapter->tx_queue[i], 184 adapter); 185 } 186 } else { 187 netdev_info(adapter->netdev, "NIC Link is Down\n"); 188 netif_carrier_off(adapter->netdev); 189 190 if (affectTxQueue) { 191 for (i = 0; i < adapter->num_tx_queues; i++) 192 vmxnet3_tq_stop(&adapter->tx_queue[i], adapter); 193 } 194 } 195 } 196 197 static void 198 vmxnet3_process_events(struct vmxnet3_adapter *adapter) 199 { 200 int i; 201 unsigned long flags; 202 u32 events = le32_to_cpu(adapter->shared->ecr); 203 if (!events) 204 return; 205 206 vmxnet3_ack_events(adapter, events); 207 208 /* Check if link state has changed */ 209 if (events & VMXNET3_ECR_LINK) 210 vmxnet3_check_link(adapter, true); 211 212 /* Check if there is an error on xmit/recv queues */ 213 if (events & (VMXNET3_ECR_TQERR | VMXNET3_ECR_RQERR)) { 214 spin_lock_irqsave(&adapter->cmd_lock, flags); 215 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 216 VMXNET3_CMD_GET_QUEUE_STATUS); 217 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 218 219 for (i = 0; i < adapter->num_tx_queues; i++) 220 if (adapter->tqd_start[i].status.stopped) 221 dev_err(&adapter->netdev->dev, 222 "%s: tq[%d] error 0x%x\n", 223 adapter->netdev->name, i, le32_to_cpu( 224 adapter->tqd_start[i].status.error)); 225 for (i = 0; i < adapter->num_rx_queues; i++) 226 if (adapter->rqd_start[i].status.stopped) 227 dev_err(&adapter->netdev->dev, 228 "%s: rq[%d] error 0x%x\n", 229 adapter->netdev->name, i, 230 adapter->rqd_start[i].status.error); 231 232 schedule_work(&adapter->work); 233 } 234 } 235 236 #ifdef __BIG_ENDIAN_BITFIELD 237 /* 238 * The device expects the bitfields in shared structures to be written in 239 * little endian. When CPU is big endian, the following routines are used to 240 * correctly read and write into ABI. 241 * The general technique used here is : double word bitfields are defined in 242 * opposite order for big endian architecture. Then before reading them in 243 * driver the complete double word is translated using le32_to_cpu. Similarly 244 * After the driver writes into bitfields, cpu_to_le32 is used to translate the 245 * double words into required format. 246 * In order to avoid touching bits in shared structure more than once, temporary 247 * descriptors are used. These are passed as srcDesc to following functions. 248 */ 249 static void vmxnet3_RxDescToCPU(const struct Vmxnet3_RxDesc *srcDesc, 250 struct Vmxnet3_RxDesc *dstDesc) 251 { 252 u32 *src = (u32 *)srcDesc + 2; 253 u32 *dst = (u32 *)dstDesc + 2; 254 dstDesc->addr = le64_to_cpu(srcDesc->addr); 255 *dst = le32_to_cpu(*src); 256 dstDesc->ext1 = le32_to_cpu(srcDesc->ext1); 257 } 258 259 static void vmxnet3_TxDescToLe(const struct Vmxnet3_TxDesc *srcDesc, 260 struct Vmxnet3_TxDesc *dstDesc) 261 { 262 int i; 263 u32 *src = (u32 *)(srcDesc + 1); 264 u32 *dst = (u32 *)(dstDesc + 1); 265 266 /* Working backwards so that the gen bit is set at the end. */ 267 for (i = 2; i > 0; i--) { 268 src--; 269 dst--; 270 *dst = cpu_to_le32(*src); 271 } 272 } 273 274 275 static void vmxnet3_RxCompToCPU(const struct Vmxnet3_RxCompDesc *srcDesc, 276 struct Vmxnet3_RxCompDesc *dstDesc) 277 { 278 int i = 0; 279 u32 *src = (u32 *)srcDesc; 280 u32 *dst = (u32 *)dstDesc; 281 for (i = 0; i < sizeof(struct Vmxnet3_RxCompDesc) / sizeof(u32); i++) { 282 *dst = le32_to_cpu(*src); 283 src++; 284 dst++; 285 } 286 } 287 288 289 /* Used to read bitfield values from double words. */ 290 static u32 get_bitfield32(const __le32 *bitfield, u32 pos, u32 size) 291 { 292 u32 temp = le32_to_cpu(*bitfield); 293 u32 mask = ((1 << size) - 1) << pos; 294 temp &= mask; 295 temp >>= pos; 296 return temp; 297 } 298 299 300 301 #endif /* __BIG_ENDIAN_BITFIELD */ 302 303 #ifdef __BIG_ENDIAN_BITFIELD 304 305 # define VMXNET3_TXDESC_GET_GEN(txdesc) get_bitfield32(((const __le32 *) \ 306 txdesc) + VMXNET3_TXD_GEN_DWORD_SHIFT, \ 307 VMXNET3_TXD_GEN_SHIFT, VMXNET3_TXD_GEN_SIZE) 308 # define VMXNET3_TXDESC_GET_EOP(txdesc) get_bitfield32(((const __le32 *) \ 309 txdesc) + VMXNET3_TXD_EOP_DWORD_SHIFT, \ 310 VMXNET3_TXD_EOP_SHIFT, VMXNET3_TXD_EOP_SIZE) 311 # define VMXNET3_TCD_GET_GEN(tcd) get_bitfield32(((const __le32 *)tcd) + \ 312 VMXNET3_TCD_GEN_DWORD_SHIFT, VMXNET3_TCD_GEN_SHIFT, \ 313 VMXNET3_TCD_GEN_SIZE) 314 # define VMXNET3_TCD_GET_TXIDX(tcd) get_bitfield32((const __le32 *)tcd, \ 315 VMXNET3_TCD_TXIDX_SHIFT, VMXNET3_TCD_TXIDX_SIZE) 316 # define vmxnet3_getRxComp(dstrcd, rcd, tmp) do { \ 317 (dstrcd) = (tmp); \ 318 vmxnet3_RxCompToCPU((rcd), (tmp)); \ 319 } while (0) 320 # define vmxnet3_getRxDesc(dstrxd, rxd, tmp) do { \ 321 (dstrxd) = (tmp); \ 322 vmxnet3_RxDescToCPU((rxd), (tmp)); \ 323 } while (0) 324 325 #else 326 327 # define VMXNET3_TXDESC_GET_GEN(txdesc) ((txdesc)->gen) 328 # define VMXNET3_TXDESC_GET_EOP(txdesc) ((txdesc)->eop) 329 # define VMXNET3_TCD_GET_GEN(tcd) ((tcd)->gen) 330 # define VMXNET3_TCD_GET_TXIDX(tcd) ((tcd)->txdIdx) 331 # define vmxnet3_getRxComp(dstrcd, rcd, tmp) (dstrcd) = (rcd) 332 # define vmxnet3_getRxDesc(dstrxd, rxd, tmp) (dstrxd) = (rxd) 333 334 #endif /* __BIG_ENDIAN_BITFIELD */ 335 336 337 static void 338 vmxnet3_unmap_tx_buf(struct vmxnet3_tx_buf_info *tbi, 339 struct pci_dev *pdev) 340 { 341 if (tbi->map_type == VMXNET3_MAP_SINGLE) 342 dma_unmap_single(&pdev->dev, tbi->dma_addr, tbi->len, 343 DMA_TO_DEVICE); 344 else if (tbi->map_type == VMXNET3_MAP_PAGE) 345 dma_unmap_page(&pdev->dev, tbi->dma_addr, tbi->len, 346 DMA_TO_DEVICE); 347 else 348 BUG_ON(tbi->map_type != VMXNET3_MAP_NONE); 349 350 tbi->map_type = VMXNET3_MAP_NONE; /* to help debugging */ 351 } 352 353 354 static int 355 vmxnet3_unmap_pkt(u32 eop_idx, struct vmxnet3_tx_queue *tq, 356 struct pci_dev *pdev, struct vmxnet3_adapter *adapter) 357 { 358 struct sk_buff *skb; 359 int entries = 0; 360 361 /* no out of order completion */ 362 BUG_ON(tq->buf_info[eop_idx].sop_idx != tq->tx_ring.next2comp); 363 BUG_ON(VMXNET3_TXDESC_GET_EOP(&(tq->tx_ring.base[eop_idx].txd)) != 1); 364 365 skb = tq->buf_info[eop_idx].skb; 366 BUG_ON(skb == NULL); 367 tq->buf_info[eop_idx].skb = NULL; 368 369 VMXNET3_INC_RING_IDX_ONLY(eop_idx, tq->tx_ring.size); 370 371 while (tq->tx_ring.next2comp != eop_idx) { 372 vmxnet3_unmap_tx_buf(tq->buf_info + tq->tx_ring.next2comp, 373 pdev); 374 375 /* update next2comp w/o tx_lock. Since we are marking more, 376 * instead of less, tx ring entries avail, the worst case is 377 * that the tx routine incorrectly re-queues a pkt due to 378 * insufficient tx ring entries. 379 */ 380 vmxnet3_cmd_ring_adv_next2comp(&tq->tx_ring); 381 entries++; 382 } 383 384 dev_kfree_skb_any(skb); 385 return entries; 386 } 387 388 389 static int 390 vmxnet3_tq_tx_complete(struct vmxnet3_tx_queue *tq, 391 struct vmxnet3_adapter *adapter) 392 { 393 int completed = 0; 394 union Vmxnet3_GenericDesc *gdesc; 395 396 gdesc = tq->comp_ring.base + tq->comp_ring.next2proc; 397 while (VMXNET3_TCD_GET_GEN(&gdesc->tcd) == tq->comp_ring.gen) { 398 /* Prevent any &gdesc->tcd field from being (speculatively) 399 * read before (&gdesc->tcd)->gen is read. 400 */ 401 dma_rmb(); 402 403 completed += vmxnet3_unmap_pkt(VMXNET3_TCD_GET_TXIDX( 404 &gdesc->tcd), tq, adapter->pdev, 405 adapter); 406 407 vmxnet3_comp_ring_adv_next2proc(&tq->comp_ring); 408 gdesc = tq->comp_ring.base + tq->comp_ring.next2proc; 409 } 410 411 if (completed) { 412 spin_lock(&tq->tx_lock); 413 if (unlikely(vmxnet3_tq_stopped(tq, adapter) && 414 vmxnet3_cmd_ring_desc_avail(&tq->tx_ring) > 415 VMXNET3_WAKE_QUEUE_THRESHOLD(tq) && 416 netif_carrier_ok(adapter->netdev))) { 417 vmxnet3_tq_wake(tq, adapter); 418 } 419 spin_unlock(&tq->tx_lock); 420 } 421 return completed; 422 } 423 424 425 static void 426 vmxnet3_tq_cleanup(struct vmxnet3_tx_queue *tq, 427 struct vmxnet3_adapter *adapter) 428 { 429 int i; 430 431 while (tq->tx_ring.next2comp != tq->tx_ring.next2fill) { 432 struct vmxnet3_tx_buf_info *tbi; 433 434 tbi = tq->buf_info + tq->tx_ring.next2comp; 435 436 vmxnet3_unmap_tx_buf(tbi, adapter->pdev); 437 if (tbi->skb) { 438 dev_kfree_skb_any(tbi->skb); 439 tbi->skb = NULL; 440 } 441 vmxnet3_cmd_ring_adv_next2comp(&tq->tx_ring); 442 } 443 444 /* sanity check, verify all buffers are indeed unmapped and freed */ 445 for (i = 0; i < tq->tx_ring.size; i++) { 446 BUG_ON(tq->buf_info[i].skb != NULL || 447 tq->buf_info[i].map_type != VMXNET3_MAP_NONE); 448 } 449 450 tq->tx_ring.gen = VMXNET3_INIT_GEN; 451 tq->tx_ring.next2fill = tq->tx_ring.next2comp = 0; 452 453 tq->comp_ring.gen = VMXNET3_INIT_GEN; 454 tq->comp_ring.next2proc = 0; 455 } 456 457 458 static void 459 vmxnet3_tq_destroy(struct vmxnet3_tx_queue *tq, 460 struct vmxnet3_adapter *adapter) 461 { 462 if (tq->tx_ring.base) { 463 dma_free_coherent(&adapter->pdev->dev, tq->tx_ring.size * 464 sizeof(struct Vmxnet3_TxDesc), 465 tq->tx_ring.base, tq->tx_ring.basePA); 466 tq->tx_ring.base = NULL; 467 } 468 if (tq->data_ring.base) { 469 dma_free_coherent(&adapter->pdev->dev, 470 tq->data_ring.size * tq->txdata_desc_size, 471 tq->data_ring.base, tq->data_ring.basePA); 472 tq->data_ring.base = NULL; 473 } 474 if (tq->comp_ring.base) { 475 dma_free_coherent(&adapter->pdev->dev, tq->comp_ring.size * 476 sizeof(struct Vmxnet3_TxCompDesc), 477 tq->comp_ring.base, tq->comp_ring.basePA); 478 tq->comp_ring.base = NULL; 479 } 480 kfree(tq->buf_info); 481 tq->buf_info = NULL; 482 } 483 484 485 /* Destroy all tx queues */ 486 void 487 vmxnet3_tq_destroy_all(struct vmxnet3_adapter *adapter) 488 { 489 int i; 490 491 for (i = 0; i < adapter->num_tx_queues; i++) 492 vmxnet3_tq_destroy(&adapter->tx_queue[i], adapter); 493 } 494 495 496 static void 497 vmxnet3_tq_init(struct vmxnet3_tx_queue *tq, 498 struct vmxnet3_adapter *adapter) 499 { 500 int i; 501 502 /* reset the tx ring contents to 0 and reset the tx ring states */ 503 memset(tq->tx_ring.base, 0, tq->tx_ring.size * 504 sizeof(struct Vmxnet3_TxDesc)); 505 tq->tx_ring.next2fill = tq->tx_ring.next2comp = 0; 506 tq->tx_ring.gen = VMXNET3_INIT_GEN; 507 508 memset(tq->data_ring.base, 0, 509 tq->data_ring.size * tq->txdata_desc_size); 510 511 /* reset the tx comp ring contents to 0 and reset comp ring states */ 512 memset(tq->comp_ring.base, 0, tq->comp_ring.size * 513 sizeof(struct Vmxnet3_TxCompDesc)); 514 tq->comp_ring.next2proc = 0; 515 tq->comp_ring.gen = VMXNET3_INIT_GEN; 516 517 /* reset the bookkeeping data */ 518 memset(tq->buf_info, 0, sizeof(tq->buf_info[0]) * tq->tx_ring.size); 519 for (i = 0; i < tq->tx_ring.size; i++) 520 tq->buf_info[i].map_type = VMXNET3_MAP_NONE; 521 522 /* stats are not reset */ 523 } 524 525 526 static int 527 vmxnet3_tq_create(struct vmxnet3_tx_queue *tq, 528 struct vmxnet3_adapter *adapter) 529 { 530 BUG_ON(tq->tx_ring.base || tq->data_ring.base || 531 tq->comp_ring.base || tq->buf_info); 532 533 tq->tx_ring.base = dma_alloc_coherent(&adapter->pdev->dev, 534 tq->tx_ring.size * sizeof(struct Vmxnet3_TxDesc), 535 &tq->tx_ring.basePA, GFP_KERNEL); 536 if (!tq->tx_ring.base) { 537 netdev_err(adapter->netdev, "failed to allocate tx ring\n"); 538 goto err; 539 } 540 541 tq->data_ring.base = dma_alloc_coherent(&adapter->pdev->dev, 542 tq->data_ring.size * tq->txdata_desc_size, 543 &tq->data_ring.basePA, GFP_KERNEL); 544 if (!tq->data_ring.base) { 545 netdev_err(adapter->netdev, "failed to allocate tx data ring\n"); 546 goto err; 547 } 548 549 tq->comp_ring.base = dma_alloc_coherent(&adapter->pdev->dev, 550 tq->comp_ring.size * sizeof(struct Vmxnet3_TxCompDesc), 551 &tq->comp_ring.basePA, GFP_KERNEL); 552 if (!tq->comp_ring.base) { 553 netdev_err(adapter->netdev, "failed to allocate tx comp ring\n"); 554 goto err; 555 } 556 557 tq->buf_info = kcalloc_node(tq->tx_ring.size, sizeof(tq->buf_info[0]), 558 GFP_KERNEL, 559 dev_to_node(&adapter->pdev->dev)); 560 if (!tq->buf_info) 561 goto err; 562 563 return 0; 564 565 err: 566 vmxnet3_tq_destroy(tq, adapter); 567 return -ENOMEM; 568 } 569 570 static void 571 vmxnet3_tq_cleanup_all(struct vmxnet3_adapter *adapter) 572 { 573 int i; 574 575 for (i = 0; i < adapter->num_tx_queues; i++) 576 vmxnet3_tq_cleanup(&adapter->tx_queue[i], adapter); 577 } 578 579 /* 580 * starting from ring->next2fill, allocate rx buffers for the given ring 581 * of the rx queue and update the rx desc. stop after @num_to_alloc buffers 582 * are allocated or allocation fails 583 */ 584 585 static int 586 vmxnet3_rq_alloc_rx_buf(struct vmxnet3_rx_queue *rq, u32 ring_idx, 587 int num_to_alloc, struct vmxnet3_adapter *adapter) 588 { 589 int num_allocated = 0; 590 struct vmxnet3_rx_buf_info *rbi_base = rq->buf_info[ring_idx]; 591 struct vmxnet3_cmd_ring *ring = &rq->rx_ring[ring_idx]; 592 u32 val; 593 594 while (num_allocated <= num_to_alloc) { 595 struct vmxnet3_rx_buf_info *rbi; 596 union Vmxnet3_GenericDesc *gd; 597 598 rbi = rbi_base + ring->next2fill; 599 gd = ring->base + ring->next2fill; 600 rbi->comp_state = VMXNET3_RXD_COMP_PENDING; 601 602 if (rbi->buf_type == VMXNET3_RX_BUF_SKB) { 603 if (rbi->skb == NULL) { 604 rbi->skb = __netdev_alloc_skb_ip_align(adapter->netdev, 605 rbi->len, 606 GFP_KERNEL); 607 if (unlikely(rbi->skb == NULL)) { 608 rq->stats.rx_buf_alloc_failure++; 609 break; 610 } 611 612 rbi->dma_addr = dma_map_single( 613 &adapter->pdev->dev, 614 rbi->skb->data, rbi->len, 615 DMA_FROM_DEVICE); 616 if (dma_mapping_error(&adapter->pdev->dev, 617 rbi->dma_addr)) { 618 dev_kfree_skb_any(rbi->skb); 619 rbi->skb = NULL; 620 rq->stats.rx_buf_alloc_failure++; 621 break; 622 } 623 } else { 624 /* rx buffer skipped by the device */ 625 } 626 val = VMXNET3_RXD_BTYPE_HEAD << VMXNET3_RXD_BTYPE_SHIFT; 627 } else { 628 BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_PAGE || 629 rbi->len != PAGE_SIZE); 630 631 if (rbi->page == NULL) { 632 rbi->page = alloc_page(GFP_ATOMIC); 633 if (unlikely(rbi->page == NULL)) { 634 rq->stats.rx_buf_alloc_failure++; 635 break; 636 } 637 rbi->dma_addr = dma_map_page( 638 &adapter->pdev->dev, 639 rbi->page, 0, PAGE_SIZE, 640 DMA_FROM_DEVICE); 641 if (dma_mapping_error(&adapter->pdev->dev, 642 rbi->dma_addr)) { 643 put_page(rbi->page); 644 rbi->page = NULL; 645 rq->stats.rx_buf_alloc_failure++; 646 break; 647 } 648 } else { 649 /* rx buffers skipped by the device */ 650 } 651 val = VMXNET3_RXD_BTYPE_BODY << VMXNET3_RXD_BTYPE_SHIFT; 652 } 653 654 gd->rxd.addr = cpu_to_le64(rbi->dma_addr); 655 gd->dword[2] = cpu_to_le32((!ring->gen << VMXNET3_RXD_GEN_SHIFT) 656 | val | rbi->len); 657 658 /* Fill the last buffer but dont mark it ready, or else the 659 * device will think that the queue is full */ 660 if (num_allocated == num_to_alloc) { 661 rbi->comp_state = VMXNET3_RXD_COMP_DONE; 662 break; 663 } 664 665 gd->dword[2] |= cpu_to_le32(ring->gen << VMXNET3_RXD_GEN_SHIFT); 666 num_allocated++; 667 vmxnet3_cmd_ring_adv_next2fill(ring); 668 } 669 670 netdev_dbg(adapter->netdev, 671 "alloc_rx_buf: %d allocated, next2fill %u, next2comp %u\n", 672 num_allocated, ring->next2fill, ring->next2comp); 673 674 /* so that the device can distinguish a full ring and an empty ring */ 675 BUG_ON(num_allocated != 0 && ring->next2fill == ring->next2comp); 676 677 return num_allocated; 678 } 679 680 681 static void 682 vmxnet3_append_frag(struct sk_buff *skb, struct Vmxnet3_RxCompDesc *rcd, 683 struct vmxnet3_rx_buf_info *rbi) 684 { 685 skb_frag_t *frag = skb_shinfo(skb)->frags + skb_shinfo(skb)->nr_frags; 686 687 BUG_ON(skb_shinfo(skb)->nr_frags >= MAX_SKB_FRAGS); 688 689 skb_frag_fill_page_desc(frag, rbi->page, 0, rcd->len); 690 skb->data_len += rcd->len; 691 skb->truesize += PAGE_SIZE; 692 skb_shinfo(skb)->nr_frags++; 693 } 694 695 696 static int 697 vmxnet3_map_pkt(struct sk_buff *skb, struct vmxnet3_tx_ctx *ctx, 698 struct vmxnet3_tx_queue *tq, struct pci_dev *pdev, 699 struct vmxnet3_adapter *adapter) 700 { 701 u32 dw2, len; 702 unsigned long buf_offset; 703 int i; 704 union Vmxnet3_GenericDesc *gdesc; 705 struct vmxnet3_tx_buf_info *tbi = NULL; 706 707 BUG_ON(ctx->copy_size > skb_headlen(skb)); 708 709 /* use the previous gen bit for the SOP desc */ 710 dw2 = (tq->tx_ring.gen ^ 0x1) << VMXNET3_TXD_GEN_SHIFT; 711 712 ctx->sop_txd = tq->tx_ring.base + tq->tx_ring.next2fill; 713 gdesc = ctx->sop_txd; /* both loops below can be skipped */ 714 715 /* no need to map the buffer if headers are copied */ 716 if (ctx->copy_size) { 717 ctx->sop_txd->txd.addr = cpu_to_le64(tq->data_ring.basePA + 718 tq->tx_ring.next2fill * 719 tq->txdata_desc_size); 720 ctx->sop_txd->dword[2] = cpu_to_le32(dw2 | ctx->copy_size); 721 ctx->sop_txd->dword[3] = 0; 722 723 tbi = tq->buf_info + tq->tx_ring.next2fill; 724 tbi->map_type = VMXNET3_MAP_NONE; 725 726 netdev_dbg(adapter->netdev, 727 "txd[%u]: 0x%Lx 0x%x 0x%x\n", 728 tq->tx_ring.next2fill, 729 le64_to_cpu(ctx->sop_txd->txd.addr), 730 ctx->sop_txd->dword[2], ctx->sop_txd->dword[3]); 731 vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring); 732 733 /* use the right gen for non-SOP desc */ 734 dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT; 735 } 736 737 /* linear part can use multiple tx desc if it's big */ 738 len = skb_headlen(skb) - ctx->copy_size; 739 buf_offset = ctx->copy_size; 740 while (len) { 741 u32 buf_size; 742 743 if (len < VMXNET3_MAX_TX_BUF_SIZE) { 744 buf_size = len; 745 dw2 |= len; 746 } else { 747 buf_size = VMXNET3_MAX_TX_BUF_SIZE; 748 /* spec says that for TxDesc.len, 0 == 2^14 */ 749 } 750 751 tbi = tq->buf_info + tq->tx_ring.next2fill; 752 tbi->map_type = VMXNET3_MAP_SINGLE; 753 tbi->dma_addr = dma_map_single(&adapter->pdev->dev, 754 skb->data + buf_offset, buf_size, 755 DMA_TO_DEVICE); 756 if (dma_mapping_error(&adapter->pdev->dev, tbi->dma_addr)) 757 return -EFAULT; 758 759 tbi->len = buf_size; 760 761 gdesc = tq->tx_ring.base + tq->tx_ring.next2fill; 762 BUG_ON(gdesc->txd.gen == tq->tx_ring.gen); 763 764 gdesc->txd.addr = cpu_to_le64(tbi->dma_addr); 765 gdesc->dword[2] = cpu_to_le32(dw2); 766 gdesc->dword[3] = 0; 767 768 netdev_dbg(adapter->netdev, 769 "txd[%u]: 0x%Lx 0x%x 0x%x\n", 770 tq->tx_ring.next2fill, le64_to_cpu(gdesc->txd.addr), 771 le32_to_cpu(gdesc->dword[2]), gdesc->dword[3]); 772 vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring); 773 dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT; 774 775 len -= buf_size; 776 buf_offset += buf_size; 777 } 778 779 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 780 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 781 u32 buf_size; 782 783 buf_offset = 0; 784 len = skb_frag_size(frag); 785 while (len) { 786 tbi = tq->buf_info + tq->tx_ring.next2fill; 787 if (len < VMXNET3_MAX_TX_BUF_SIZE) { 788 buf_size = len; 789 dw2 |= len; 790 } else { 791 buf_size = VMXNET3_MAX_TX_BUF_SIZE; 792 /* spec says that for TxDesc.len, 0 == 2^14 */ 793 } 794 tbi->map_type = VMXNET3_MAP_PAGE; 795 tbi->dma_addr = skb_frag_dma_map(&adapter->pdev->dev, frag, 796 buf_offset, buf_size, 797 DMA_TO_DEVICE); 798 if (dma_mapping_error(&adapter->pdev->dev, tbi->dma_addr)) 799 return -EFAULT; 800 801 tbi->len = buf_size; 802 803 gdesc = tq->tx_ring.base + tq->tx_ring.next2fill; 804 BUG_ON(gdesc->txd.gen == tq->tx_ring.gen); 805 806 gdesc->txd.addr = cpu_to_le64(tbi->dma_addr); 807 gdesc->dword[2] = cpu_to_le32(dw2); 808 gdesc->dword[3] = 0; 809 810 netdev_dbg(adapter->netdev, 811 "txd[%u]: 0x%llx %u %u\n", 812 tq->tx_ring.next2fill, le64_to_cpu(gdesc->txd.addr), 813 le32_to_cpu(gdesc->dword[2]), gdesc->dword[3]); 814 vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring); 815 dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT; 816 817 len -= buf_size; 818 buf_offset += buf_size; 819 } 820 } 821 822 ctx->eop_txd = gdesc; 823 824 /* set the last buf_info for the pkt */ 825 tbi->skb = skb; 826 tbi->sop_idx = ctx->sop_txd - tq->tx_ring.base; 827 828 return 0; 829 } 830 831 832 /* Init all tx queues */ 833 static void 834 vmxnet3_tq_init_all(struct vmxnet3_adapter *adapter) 835 { 836 int i; 837 838 for (i = 0; i < adapter->num_tx_queues; i++) 839 vmxnet3_tq_init(&adapter->tx_queue[i], adapter); 840 } 841 842 843 /* 844 * parse relevant protocol headers: 845 * For a tso pkt, relevant headers are L2/3/4 including options 846 * For a pkt requesting csum offloading, they are L2/3 and may include L4 847 * if it's a TCP/UDP pkt 848 * 849 * Returns: 850 * -1: error happens during parsing 851 * 0: protocol headers parsed, but too big to be copied 852 * 1: protocol headers parsed and copied 853 * 854 * Other effects: 855 * 1. related *ctx fields are updated. 856 * 2. ctx->copy_size is # of bytes copied 857 * 3. the portion to be copied is guaranteed to be in the linear part 858 * 859 */ 860 static int 861 vmxnet3_parse_hdr(struct sk_buff *skb, struct vmxnet3_tx_queue *tq, 862 struct vmxnet3_tx_ctx *ctx, 863 struct vmxnet3_adapter *adapter) 864 { 865 u8 protocol = 0; 866 867 if (ctx->mss) { /* TSO */ 868 if (VMXNET3_VERSION_GE_4(adapter) && skb->encapsulation) { 869 ctx->l4_offset = skb_inner_transport_offset(skb); 870 ctx->l4_hdr_size = inner_tcp_hdrlen(skb); 871 ctx->copy_size = ctx->l4_offset + ctx->l4_hdr_size; 872 } else { 873 ctx->l4_offset = skb_transport_offset(skb); 874 ctx->l4_hdr_size = tcp_hdrlen(skb); 875 ctx->copy_size = ctx->l4_offset + ctx->l4_hdr_size; 876 } 877 } else { 878 if (skb->ip_summed == CHECKSUM_PARTIAL) { 879 /* For encap packets, skb_checksum_start_offset refers 880 * to inner L4 offset. Thus, below works for encap as 881 * well as non-encap case 882 */ 883 ctx->l4_offset = skb_checksum_start_offset(skb); 884 885 if (VMXNET3_VERSION_GE_4(adapter) && 886 skb->encapsulation) { 887 struct iphdr *iph = inner_ip_hdr(skb); 888 889 if (iph->version == 4) { 890 protocol = iph->protocol; 891 } else { 892 const struct ipv6hdr *ipv6h; 893 894 ipv6h = inner_ipv6_hdr(skb); 895 protocol = ipv6h->nexthdr; 896 } 897 } else { 898 if (ctx->ipv4) { 899 const struct iphdr *iph = ip_hdr(skb); 900 901 protocol = iph->protocol; 902 } else if (ctx->ipv6) { 903 const struct ipv6hdr *ipv6h; 904 905 ipv6h = ipv6_hdr(skb); 906 protocol = ipv6h->nexthdr; 907 } 908 } 909 910 switch (protocol) { 911 case IPPROTO_TCP: 912 ctx->l4_hdr_size = skb->encapsulation ? inner_tcp_hdrlen(skb) : 913 tcp_hdrlen(skb); 914 break; 915 case IPPROTO_UDP: 916 ctx->l4_hdr_size = sizeof(struct udphdr); 917 break; 918 default: 919 ctx->l4_hdr_size = 0; 920 break; 921 } 922 923 ctx->copy_size = min(ctx->l4_offset + 924 ctx->l4_hdr_size, skb->len); 925 } else { 926 ctx->l4_offset = 0; 927 ctx->l4_hdr_size = 0; 928 /* copy as much as allowed */ 929 ctx->copy_size = min_t(unsigned int, 930 tq->txdata_desc_size, 931 skb_headlen(skb)); 932 } 933 934 if (skb->len <= VMXNET3_HDR_COPY_SIZE) 935 ctx->copy_size = skb->len; 936 937 /* make sure headers are accessible directly */ 938 if (unlikely(!pskb_may_pull(skb, ctx->copy_size))) 939 goto err; 940 } 941 942 if (unlikely(ctx->copy_size > tq->txdata_desc_size)) { 943 tq->stats.oversized_hdr++; 944 ctx->copy_size = 0; 945 return 0; 946 } 947 948 return 1; 949 err: 950 return -1; 951 } 952 953 /* 954 * copy relevant protocol headers to the transmit ring: 955 * For a tso pkt, relevant headers are L2/3/4 including options 956 * For a pkt requesting csum offloading, they are L2/3 and may include L4 957 * if it's a TCP/UDP pkt 958 * 959 * 960 * Note that this requires that vmxnet3_parse_hdr be called first to set the 961 * appropriate bits in ctx first 962 */ 963 static void 964 vmxnet3_copy_hdr(struct sk_buff *skb, struct vmxnet3_tx_queue *tq, 965 struct vmxnet3_tx_ctx *ctx, 966 struct vmxnet3_adapter *adapter) 967 { 968 struct Vmxnet3_TxDataDesc *tdd; 969 970 tdd = (struct Vmxnet3_TxDataDesc *)((u8 *)tq->data_ring.base + 971 tq->tx_ring.next2fill * 972 tq->txdata_desc_size); 973 974 memcpy(tdd->data, skb->data, ctx->copy_size); 975 netdev_dbg(adapter->netdev, 976 "copy %u bytes to dataRing[%u]\n", 977 ctx->copy_size, tq->tx_ring.next2fill); 978 } 979 980 981 static void 982 vmxnet3_prepare_inner_tso(struct sk_buff *skb, 983 struct vmxnet3_tx_ctx *ctx) 984 { 985 struct tcphdr *tcph = inner_tcp_hdr(skb); 986 struct iphdr *iph = inner_ip_hdr(skb); 987 988 if (iph->version == 4) { 989 iph->check = 0; 990 tcph->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr, 0, 991 IPPROTO_TCP, 0); 992 } else { 993 struct ipv6hdr *iph = inner_ipv6_hdr(skb); 994 995 tcph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, 0, 996 IPPROTO_TCP, 0); 997 } 998 } 999 1000 static void 1001 vmxnet3_prepare_tso(struct sk_buff *skb, 1002 struct vmxnet3_tx_ctx *ctx) 1003 { 1004 struct tcphdr *tcph = tcp_hdr(skb); 1005 1006 if (ctx->ipv4) { 1007 struct iphdr *iph = ip_hdr(skb); 1008 1009 iph->check = 0; 1010 tcph->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr, 0, 1011 IPPROTO_TCP, 0); 1012 } else if (ctx->ipv6) { 1013 tcp_v6_gso_csum_prep(skb); 1014 } 1015 } 1016 1017 static int txd_estimate(const struct sk_buff *skb) 1018 { 1019 int count = VMXNET3_TXD_NEEDED(skb_headlen(skb)) + 1; 1020 int i; 1021 1022 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 1023 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 1024 1025 count += VMXNET3_TXD_NEEDED(skb_frag_size(frag)); 1026 } 1027 return count; 1028 } 1029 1030 /* 1031 * Transmits a pkt thru a given tq 1032 * Returns: 1033 * NETDEV_TX_OK: descriptors are setup successfully 1034 * NETDEV_TX_OK: error occurred, the pkt is dropped 1035 * NETDEV_TX_BUSY: tx ring is full, queue is stopped 1036 * 1037 * Side-effects: 1038 * 1. tx ring may be changed 1039 * 2. tq stats may be updated accordingly 1040 * 3. shared->txNumDeferred may be updated 1041 */ 1042 1043 static int 1044 vmxnet3_tq_xmit(struct sk_buff *skb, struct vmxnet3_tx_queue *tq, 1045 struct vmxnet3_adapter *adapter, struct net_device *netdev) 1046 { 1047 int ret; 1048 u32 count; 1049 int num_pkts; 1050 int tx_num_deferred; 1051 unsigned long flags; 1052 struct vmxnet3_tx_ctx ctx; 1053 union Vmxnet3_GenericDesc *gdesc; 1054 #ifdef __BIG_ENDIAN_BITFIELD 1055 /* Use temporary descriptor to avoid touching bits multiple times */ 1056 union Vmxnet3_GenericDesc tempTxDesc; 1057 #endif 1058 1059 count = txd_estimate(skb); 1060 1061 ctx.ipv4 = (vlan_get_protocol(skb) == cpu_to_be16(ETH_P_IP)); 1062 ctx.ipv6 = (vlan_get_protocol(skb) == cpu_to_be16(ETH_P_IPV6)); 1063 1064 ctx.mss = skb_shinfo(skb)->gso_size; 1065 if (ctx.mss) { 1066 if (skb_header_cloned(skb)) { 1067 if (unlikely(pskb_expand_head(skb, 0, 0, 1068 GFP_ATOMIC) != 0)) { 1069 tq->stats.drop_tso++; 1070 goto drop_pkt; 1071 } 1072 tq->stats.copy_skb_header++; 1073 } 1074 if (unlikely(count > VMXNET3_MAX_TSO_TXD_PER_PKT)) { 1075 /* tso pkts must not use more than 1076 * VMXNET3_MAX_TSO_TXD_PER_PKT entries 1077 */ 1078 if (skb_linearize(skb) != 0) { 1079 tq->stats.drop_too_many_frags++; 1080 goto drop_pkt; 1081 } 1082 tq->stats.linearized++; 1083 1084 /* recalculate the # of descriptors to use */ 1085 count = VMXNET3_TXD_NEEDED(skb_headlen(skb)) + 1; 1086 if (unlikely(count > VMXNET3_MAX_TSO_TXD_PER_PKT)) { 1087 tq->stats.drop_too_many_frags++; 1088 goto drop_pkt; 1089 } 1090 } 1091 if (skb->encapsulation) { 1092 vmxnet3_prepare_inner_tso(skb, &ctx); 1093 } else { 1094 vmxnet3_prepare_tso(skb, &ctx); 1095 } 1096 } else { 1097 if (unlikely(count > VMXNET3_MAX_TXD_PER_PKT)) { 1098 1099 /* non-tso pkts must not use more than 1100 * VMXNET3_MAX_TXD_PER_PKT entries 1101 */ 1102 if (skb_linearize(skb) != 0) { 1103 tq->stats.drop_too_many_frags++; 1104 goto drop_pkt; 1105 } 1106 tq->stats.linearized++; 1107 1108 /* recalculate the # of descriptors to use */ 1109 count = VMXNET3_TXD_NEEDED(skb_headlen(skb)) + 1; 1110 } 1111 } 1112 1113 ret = vmxnet3_parse_hdr(skb, tq, &ctx, adapter); 1114 if (ret >= 0) { 1115 BUG_ON(ret <= 0 && ctx.copy_size != 0); 1116 /* hdrs parsed, check against other limits */ 1117 if (ctx.mss) { 1118 if (unlikely(ctx.l4_offset + ctx.l4_hdr_size > 1119 VMXNET3_MAX_TX_BUF_SIZE)) { 1120 tq->stats.drop_oversized_hdr++; 1121 goto drop_pkt; 1122 } 1123 } else { 1124 if (skb->ip_summed == CHECKSUM_PARTIAL) { 1125 if (unlikely(ctx.l4_offset + 1126 skb->csum_offset > 1127 VMXNET3_MAX_CSUM_OFFSET)) { 1128 tq->stats.drop_oversized_hdr++; 1129 goto drop_pkt; 1130 } 1131 } 1132 } 1133 } else { 1134 tq->stats.drop_hdr_inspect_err++; 1135 goto drop_pkt; 1136 } 1137 1138 spin_lock_irqsave(&tq->tx_lock, flags); 1139 1140 if (count > vmxnet3_cmd_ring_desc_avail(&tq->tx_ring)) { 1141 tq->stats.tx_ring_full++; 1142 netdev_dbg(adapter->netdev, 1143 "tx queue stopped on %s, next2comp %u" 1144 " next2fill %u\n", adapter->netdev->name, 1145 tq->tx_ring.next2comp, tq->tx_ring.next2fill); 1146 1147 vmxnet3_tq_stop(tq, adapter); 1148 spin_unlock_irqrestore(&tq->tx_lock, flags); 1149 return NETDEV_TX_BUSY; 1150 } 1151 1152 1153 vmxnet3_copy_hdr(skb, tq, &ctx, adapter); 1154 1155 /* fill tx descs related to addr & len */ 1156 if (vmxnet3_map_pkt(skb, &ctx, tq, adapter->pdev, adapter)) 1157 goto unlock_drop_pkt; 1158 1159 /* setup the EOP desc */ 1160 ctx.eop_txd->dword[3] = cpu_to_le32(VMXNET3_TXD_CQ | VMXNET3_TXD_EOP); 1161 1162 /* setup the SOP desc */ 1163 #ifdef __BIG_ENDIAN_BITFIELD 1164 gdesc = &tempTxDesc; 1165 gdesc->dword[2] = ctx.sop_txd->dword[2]; 1166 gdesc->dword[3] = ctx.sop_txd->dword[3]; 1167 #else 1168 gdesc = ctx.sop_txd; 1169 #endif 1170 tx_num_deferred = le32_to_cpu(tq->shared->txNumDeferred); 1171 if (ctx.mss) { 1172 if (VMXNET3_VERSION_GE_4(adapter) && skb->encapsulation) { 1173 gdesc->txd.hlen = ctx.l4_offset + ctx.l4_hdr_size; 1174 if (VMXNET3_VERSION_GE_7(adapter)) { 1175 gdesc->txd.om = VMXNET3_OM_TSO; 1176 gdesc->txd.ext1 = 1; 1177 } else { 1178 gdesc->txd.om = VMXNET3_OM_ENCAP; 1179 } 1180 gdesc->txd.msscof = ctx.mss; 1181 1182 if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP_TUNNEL_CSUM) 1183 gdesc->txd.oco = 1; 1184 } else { 1185 gdesc->txd.hlen = ctx.l4_offset + ctx.l4_hdr_size; 1186 gdesc->txd.om = VMXNET3_OM_TSO; 1187 gdesc->txd.msscof = ctx.mss; 1188 } 1189 num_pkts = (skb->len - gdesc->txd.hlen + ctx.mss - 1) / ctx.mss; 1190 } else { 1191 if (skb->ip_summed == CHECKSUM_PARTIAL) { 1192 if (VMXNET3_VERSION_GE_4(adapter) && 1193 skb->encapsulation) { 1194 gdesc->txd.hlen = ctx.l4_offset + 1195 ctx.l4_hdr_size; 1196 if (VMXNET3_VERSION_GE_7(adapter)) { 1197 gdesc->txd.om = VMXNET3_OM_CSUM; 1198 gdesc->txd.msscof = ctx.l4_offset + 1199 skb->csum_offset; 1200 gdesc->txd.ext1 = 1; 1201 } else { 1202 gdesc->txd.om = VMXNET3_OM_ENCAP; 1203 gdesc->txd.msscof = 0; /* Reserved */ 1204 } 1205 } else { 1206 gdesc->txd.hlen = ctx.l4_offset; 1207 gdesc->txd.om = VMXNET3_OM_CSUM; 1208 gdesc->txd.msscof = ctx.l4_offset + 1209 skb->csum_offset; 1210 } 1211 } else { 1212 gdesc->txd.om = 0; 1213 gdesc->txd.msscof = 0; 1214 } 1215 num_pkts = 1; 1216 } 1217 le32_add_cpu(&tq->shared->txNumDeferred, num_pkts); 1218 tx_num_deferred += num_pkts; 1219 1220 if (skb_vlan_tag_present(skb)) { 1221 gdesc->txd.ti = 1; 1222 gdesc->txd.tci = skb_vlan_tag_get(skb); 1223 } 1224 1225 /* Ensure that the write to (&gdesc->txd)->gen will be observed after 1226 * all other writes to &gdesc->txd. 1227 */ 1228 dma_wmb(); 1229 1230 /* finally flips the GEN bit of the SOP desc. */ 1231 gdesc->dword[2] = cpu_to_le32(le32_to_cpu(gdesc->dword[2]) ^ 1232 VMXNET3_TXD_GEN); 1233 #ifdef __BIG_ENDIAN_BITFIELD 1234 /* Finished updating in bitfields of Tx Desc, so write them in original 1235 * place. 1236 */ 1237 vmxnet3_TxDescToLe((struct Vmxnet3_TxDesc *)gdesc, 1238 (struct Vmxnet3_TxDesc *)ctx.sop_txd); 1239 gdesc = ctx.sop_txd; 1240 #endif 1241 netdev_dbg(adapter->netdev, 1242 "txd[%u]: SOP 0x%Lx 0x%x 0x%x\n", 1243 (u32)(ctx.sop_txd - 1244 tq->tx_ring.base), le64_to_cpu(gdesc->txd.addr), 1245 le32_to_cpu(gdesc->dword[2]), le32_to_cpu(gdesc->dword[3])); 1246 1247 spin_unlock_irqrestore(&tq->tx_lock, flags); 1248 1249 if (tx_num_deferred >= le32_to_cpu(tq->shared->txThreshold)) { 1250 tq->shared->txNumDeferred = 0; 1251 VMXNET3_WRITE_BAR0_REG(adapter, 1252 adapter->tx_prod_offset + tq->qid * 8, 1253 tq->tx_ring.next2fill); 1254 } 1255 1256 return NETDEV_TX_OK; 1257 1258 unlock_drop_pkt: 1259 spin_unlock_irqrestore(&tq->tx_lock, flags); 1260 drop_pkt: 1261 tq->stats.drop_total++; 1262 dev_kfree_skb_any(skb); 1263 return NETDEV_TX_OK; 1264 } 1265 1266 1267 static netdev_tx_t 1268 vmxnet3_xmit_frame(struct sk_buff *skb, struct net_device *netdev) 1269 { 1270 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 1271 1272 BUG_ON(skb->queue_mapping > adapter->num_tx_queues); 1273 return vmxnet3_tq_xmit(skb, 1274 &adapter->tx_queue[skb->queue_mapping], 1275 adapter, netdev); 1276 } 1277 1278 1279 static void 1280 vmxnet3_rx_csum(struct vmxnet3_adapter *adapter, 1281 struct sk_buff *skb, 1282 union Vmxnet3_GenericDesc *gdesc) 1283 { 1284 if (!gdesc->rcd.cnc && adapter->netdev->features & NETIF_F_RXCSUM) { 1285 if (gdesc->rcd.v4 && 1286 (le32_to_cpu(gdesc->dword[3]) & 1287 VMXNET3_RCD_CSUM_OK) == VMXNET3_RCD_CSUM_OK) { 1288 skb->ip_summed = CHECKSUM_UNNECESSARY; 1289 if ((le32_to_cpu(gdesc->dword[0]) & 1290 (1UL << VMXNET3_RCD_HDR_INNER_SHIFT))) { 1291 skb->csum_level = 1; 1292 } 1293 WARN_ON_ONCE(!(gdesc->rcd.tcp || gdesc->rcd.udp) && 1294 !(le32_to_cpu(gdesc->dword[0]) & 1295 (1UL << VMXNET3_RCD_HDR_INNER_SHIFT))); 1296 WARN_ON_ONCE(gdesc->rcd.frg && 1297 !(le32_to_cpu(gdesc->dword[0]) & 1298 (1UL << VMXNET3_RCD_HDR_INNER_SHIFT))); 1299 } else if (gdesc->rcd.v6 && (le32_to_cpu(gdesc->dword[3]) & 1300 (1 << VMXNET3_RCD_TUC_SHIFT))) { 1301 skb->ip_summed = CHECKSUM_UNNECESSARY; 1302 if ((le32_to_cpu(gdesc->dword[0]) & 1303 (1UL << VMXNET3_RCD_HDR_INNER_SHIFT))) { 1304 skb->csum_level = 1; 1305 } 1306 WARN_ON_ONCE(!(gdesc->rcd.tcp || gdesc->rcd.udp) && 1307 !(le32_to_cpu(gdesc->dword[0]) & 1308 (1UL << VMXNET3_RCD_HDR_INNER_SHIFT))); 1309 WARN_ON_ONCE(gdesc->rcd.frg && 1310 !(le32_to_cpu(gdesc->dword[0]) & 1311 (1UL << VMXNET3_RCD_HDR_INNER_SHIFT))); 1312 } else { 1313 if (gdesc->rcd.csum) { 1314 skb->csum = htons(gdesc->rcd.csum); 1315 skb->ip_summed = CHECKSUM_PARTIAL; 1316 } else { 1317 skb_checksum_none_assert(skb); 1318 } 1319 } 1320 } else { 1321 skb_checksum_none_assert(skb); 1322 } 1323 } 1324 1325 1326 static void 1327 vmxnet3_rx_error(struct vmxnet3_rx_queue *rq, struct Vmxnet3_RxCompDesc *rcd, 1328 struct vmxnet3_rx_ctx *ctx, struct vmxnet3_adapter *adapter) 1329 { 1330 rq->stats.drop_err++; 1331 if (!rcd->fcs) 1332 rq->stats.drop_fcs++; 1333 1334 rq->stats.drop_total++; 1335 1336 /* 1337 * We do not unmap and chain the rx buffer to the skb. 1338 * We basically pretend this buffer is not used and will be recycled 1339 * by vmxnet3_rq_alloc_rx_buf() 1340 */ 1341 1342 /* 1343 * ctx->skb may be NULL if this is the first and the only one 1344 * desc for the pkt 1345 */ 1346 if (ctx->skb) 1347 dev_kfree_skb_irq(ctx->skb); 1348 1349 ctx->skb = NULL; 1350 } 1351 1352 1353 static u32 1354 vmxnet3_get_hdr_len(struct vmxnet3_adapter *adapter, struct sk_buff *skb, 1355 union Vmxnet3_GenericDesc *gdesc) 1356 { 1357 u32 hlen, maplen; 1358 union { 1359 void *ptr; 1360 struct ethhdr *eth; 1361 struct vlan_ethhdr *veth; 1362 struct iphdr *ipv4; 1363 struct ipv6hdr *ipv6; 1364 struct tcphdr *tcp; 1365 } hdr; 1366 BUG_ON(gdesc->rcd.tcp == 0); 1367 1368 maplen = skb_headlen(skb); 1369 if (unlikely(sizeof(struct iphdr) + sizeof(struct tcphdr) > maplen)) 1370 return 0; 1371 1372 if (skb->protocol == cpu_to_be16(ETH_P_8021Q) || 1373 skb->protocol == cpu_to_be16(ETH_P_8021AD)) 1374 hlen = sizeof(struct vlan_ethhdr); 1375 else 1376 hlen = sizeof(struct ethhdr); 1377 1378 hdr.eth = eth_hdr(skb); 1379 if (gdesc->rcd.v4) { 1380 BUG_ON(hdr.eth->h_proto != htons(ETH_P_IP) && 1381 hdr.veth->h_vlan_encapsulated_proto != htons(ETH_P_IP)); 1382 hdr.ptr += hlen; 1383 BUG_ON(hdr.ipv4->protocol != IPPROTO_TCP); 1384 hlen = hdr.ipv4->ihl << 2; 1385 hdr.ptr += hdr.ipv4->ihl << 2; 1386 } else if (gdesc->rcd.v6) { 1387 BUG_ON(hdr.eth->h_proto != htons(ETH_P_IPV6) && 1388 hdr.veth->h_vlan_encapsulated_proto != htons(ETH_P_IPV6)); 1389 hdr.ptr += hlen; 1390 /* Use an estimated value, since we also need to handle 1391 * TSO case. 1392 */ 1393 if (hdr.ipv6->nexthdr != IPPROTO_TCP) 1394 return sizeof(struct ipv6hdr) + sizeof(struct tcphdr); 1395 hlen = sizeof(struct ipv6hdr); 1396 hdr.ptr += sizeof(struct ipv6hdr); 1397 } else { 1398 /* Non-IP pkt, dont estimate header length */ 1399 return 0; 1400 } 1401 1402 if (hlen + sizeof(struct tcphdr) > maplen) 1403 return 0; 1404 1405 return (hlen + (hdr.tcp->doff << 2)); 1406 } 1407 1408 static int 1409 vmxnet3_rq_rx_complete(struct vmxnet3_rx_queue *rq, 1410 struct vmxnet3_adapter *adapter, int quota) 1411 { 1412 u32 rxprod_reg[2] = { 1413 adapter->rx_prod_offset, adapter->rx_prod2_offset 1414 }; 1415 u32 num_pkts = 0; 1416 bool skip_page_frags = false; 1417 bool encap_lro = false; 1418 struct Vmxnet3_RxCompDesc *rcd; 1419 struct vmxnet3_rx_ctx *ctx = &rq->rx_ctx; 1420 u16 segCnt = 0, mss = 0; 1421 int comp_offset, fill_offset; 1422 #ifdef __BIG_ENDIAN_BITFIELD 1423 struct Vmxnet3_RxDesc rxCmdDesc; 1424 struct Vmxnet3_RxCompDesc rxComp; 1425 #endif 1426 vmxnet3_getRxComp(rcd, &rq->comp_ring.base[rq->comp_ring.next2proc].rcd, 1427 &rxComp); 1428 while (rcd->gen == rq->comp_ring.gen) { 1429 struct vmxnet3_rx_buf_info *rbi; 1430 struct sk_buff *skb, *new_skb = NULL; 1431 struct page *new_page = NULL; 1432 dma_addr_t new_dma_addr; 1433 int num_to_alloc; 1434 struct Vmxnet3_RxDesc *rxd; 1435 u32 idx, ring_idx; 1436 struct vmxnet3_cmd_ring *ring = NULL; 1437 if (num_pkts >= quota) { 1438 /* we may stop even before we see the EOP desc of 1439 * the current pkt 1440 */ 1441 break; 1442 } 1443 1444 /* Prevent any rcd field from being (speculatively) read before 1445 * rcd->gen is read. 1446 */ 1447 dma_rmb(); 1448 1449 BUG_ON(rcd->rqID != rq->qid && rcd->rqID != rq->qid2 && 1450 rcd->rqID != rq->dataRingQid); 1451 idx = rcd->rxdIdx; 1452 ring_idx = VMXNET3_GET_RING_IDX(adapter, rcd->rqID); 1453 ring = rq->rx_ring + ring_idx; 1454 vmxnet3_getRxDesc(rxd, &rq->rx_ring[ring_idx].base[idx].rxd, 1455 &rxCmdDesc); 1456 rbi = rq->buf_info[ring_idx] + idx; 1457 1458 BUG_ON(rxd->addr != rbi->dma_addr || 1459 rxd->len != rbi->len); 1460 1461 if (unlikely(rcd->eop && rcd->err)) { 1462 vmxnet3_rx_error(rq, rcd, ctx, adapter); 1463 goto rcd_done; 1464 } 1465 1466 if (rcd->sop) { /* first buf of the pkt */ 1467 bool rxDataRingUsed; 1468 u16 len; 1469 1470 BUG_ON(rxd->btype != VMXNET3_RXD_BTYPE_HEAD || 1471 (rcd->rqID != rq->qid && 1472 rcd->rqID != rq->dataRingQid)); 1473 1474 BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_SKB); 1475 BUG_ON(ctx->skb != NULL || rbi->skb == NULL); 1476 1477 if (unlikely(rcd->len == 0)) { 1478 /* Pretend the rx buffer is skipped. */ 1479 BUG_ON(!(rcd->sop && rcd->eop)); 1480 netdev_dbg(adapter->netdev, 1481 "rxRing[%u][%u] 0 length\n", 1482 ring_idx, idx); 1483 goto rcd_done; 1484 } 1485 1486 skip_page_frags = false; 1487 ctx->skb = rbi->skb; 1488 1489 rxDataRingUsed = 1490 VMXNET3_RX_DATA_RING(adapter, rcd->rqID); 1491 len = rxDataRingUsed ? rcd->len : rbi->len; 1492 new_skb = netdev_alloc_skb_ip_align(adapter->netdev, 1493 len); 1494 if (new_skb == NULL) { 1495 /* Skb allocation failed, do not handover this 1496 * skb to stack. Reuse it. Drop the existing pkt 1497 */ 1498 rq->stats.rx_buf_alloc_failure++; 1499 ctx->skb = NULL; 1500 rq->stats.drop_total++; 1501 skip_page_frags = true; 1502 goto rcd_done; 1503 } 1504 1505 if (rxDataRingUsed && adapter->rxdataring_enabled) { 1506 size_t sz; 1507 1508 BUG_ON(rcd->len > rq->data_ring.desc_size); 1509 1510 ctx->skb = new_skb; 1511 sz = rcd->rxdIdx * rq->data_ring.desc_size; 1512 memcpy(new_skb->data, 1513 &rq->data_ring.base[sz], rcd->len); 1514 } else { 1515 ctx->skb = rbi->skb; 1516 1517 new_dma_addr = 1518 dma_map_single(&adapter->pdev->dev, 1519 new_skb->data, rbi->len, 1520 DMA_FROM_DEVICE); 1521 if (dma_mapping_error(&adapter->pdev->dev, 1522 new_dma_addr)) { 1523 dev_kfree_skb(new_skb); 1524 /* Skb allocation failed, do not 1525 * handover this skb to stack. Reuse 1526 * it. Drop the existing pkt. 1527 */ 1528 rq->stats.rx_buf_alloc_failure++; 1529 ctx->skb = NULL; 1530 rq->stats.drop_total++; 1531 skip_page_frags = true; 1532 goto rcd_done; 1533 } 1534 1535 dma_unmap_single(&adapter->pdev->dev, 1536 rbi->dma_addr, 1537 rbi->len, 1538 DMA_FROM_DEVICE); 1539 1540 /* Immediate refill */ 1541 rbi->skb = new_skb; 1542 rbi->dma_addr = new_dma_addr; 1543 rxd->addr = cpu_to_le64(rbi->dma_addr); 1544 rxd->len = rbi->len; 1545 } 1546 1547 skb_record_rx_queue(ctx->skb, rq->qid); 1548 skb_put(ctx->skb, rcd->len); 1549 1550 if (VMXNET3_VERSION_GE_2(adapter) && 1551 rcd->type == VMXNET3_CDTYPE_RXCOMP_LRO) { 1552 struct Vmxnet3_RxCompDescExt *rcdlro; 1553 union Vmxnet3_GenericDesc *gdesc; 1554 1555 rcdlro = (struct Vmxnet3_RxCompDescExt *)rcd; 1556 gdesc = (union Vmxnet3_GenericDesc *)rcd; 1557 1558 segCnt = rcdlro->segCnt; 1559 WARN_ON_ONCE(segCnt == 0); 1560 mss = rcdlro->mss; 1561 if (unlikely(segCnt <= 1)) 1562 segCnt = 0; 1563 encap_lro = (le32_to_cpu(gdesc->dword[0]) & 1564 (1UL << VMXNET3_RCD_HDR_INNER_SHIFT)); 1565 } else { 1566 segCnt = 0; 1567 } 1568 } else { 1569 BUG_ON(ctx->skb == NULL && !skip_page_frags); 1570 1571 /* non SOP buffer must be type 1 in most cases */ 1572 BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_PAGE); 1573 BUG_ON(rxd->btype != VMXNET3_RXD_BTYPE_BODY); 1574 1575 /* If an sop buffer was dropped, skip all 1576 * following non-sop fragments. They will be reused. 1577 */ 1578 if (skip_page_frags) 1579 goto rcd_done; 1580 1581 if (rcd->len) { 1582 new_page = alloc_page(GFP_ATOMIC); 1583 /* Replacement page frag could not be allocated. 1584 * Reuse this page. Drop the pkt and free the 1585 * skb which contained this page as a frag. Skip 1586 * processing all the following non-sop frags. 1587 */ 1588 if (unlikely(!new_page)) { 1589 rq->stats.rx_buf_alloc_failure++; 1590 dev_kfree_skb(ctx->skb); 1591 ctx->skb = NULL; 1592 skip_page_frags = true; 1593 goto rcd_done; 1594 } 1595 new_dma_addr = dma_map_page(&adapter->pdev->dev, 1596 new_page, 1597 0, PAGE_SIZE, 1598 DMA_FROM_DEVICE); 1599 if (dma_mapping_error(&adapter->pdev->dev, 1600 new_dma_addr)) { 1601 put_page(new_page); 1602 rq->stats.rx_buf_alloc_failure++; 1603 dev_kfree_skb(ctx->skb); 1604 ctx->skb = NULL; 1605 skip_page_frags = true; 1606 goto rcd_done; 1607 } 1608 1609 dma_unmap_page(&adapter->pdev->dev, 1610 rbi->dma_addr, rbi->len, 1611 DMA_FROM_DEVICE); 1612 1613 vmxnet3_append_frag(ctx->skb, rcd, rbi); 1614 1615 /* Immediate refill */ 1616 rbi->page = new_page; 1617 rbi->dma_addr = new_dma_addr; 1618 rxd->addr = cpu_to_le64(rbi->dma_addr); 1619 rxd->len = rbi->len; 1620 } 1621 } 1622 1623 1624 skb = ctx->skb; 1625 if (rcd->eop) { 1626 u32 mtu = adapter->netdev->mtu; 1627 skb->len += skb->data_len; 1628 1629 #ifdef VMXNET3_RSS 1630 if (rcd->rssType != VMXNET3_RCD_RSS_TYPE_NONE && 1631 (adapter->netdev->features & NETIF_F_RXHASH)) { 1632 enum pkt_hash_types hash_type; 1633 1634 switch (rcd->rssType) { 1635 case VMXNET3_RCD_RSS_TYPE_IPV4: 1636 case VMXNET3_RCD_RSS_TYPE_IPV6: 1637 hash_type = PKT_HASH_TYPE_L3; 1638 break; 1639 case VMXNET3_RCD_RSS_TYPE_TCPIPV4: 1640 case VMXNET3_RCD_RSS_TYPE_TCPIPV6: 1641 case VMXNET3_RCD_RSS_TYPE_UDPIPV4: 1642 case VMXNET3_RCD_RSS_TYPE_UDPIPV6: 1643 hash_type = PKT_HASH_TYPE_L4; 1644 break; 1645 default: 1646 hash_type = PKT_HASH_TYPE_L3; 1647 break; 1648 } 1649 skb_set_hash(skb, 1650 le32_to_cpu(rcd->rssHash), 1651 hash_type); 1652 } 1653 #endif 1654 vmxnet3_rx_csum(adapter, skb, 1655 (union Vmxnet3_GenericDesc *)rcd); 1656 skb->protocol = eth_type_trans(skb, adapter->netdev); 1657 if ((!rcd->tcp && !encap_lro) || 1658 !(adapter->netdev->features & NETIF_F_LRO)) 1659 goto not_lro; 1660 1661 if (segCnt != 0 && mss != 0) { 1662 skb_shinfo(skb)->gso_type = rcd->v4 ? 1663 SKB_GSO_TCPV4 : SKB_GSO_TCPV6; 1664 skb_shinfo(skb)->gso_size = mss; 1665 skb_shinfo(skb)->gso_segs = segCnt; 1666 } else if ((segCnt != 0 || skb->len > mtu) && !encap_lro) { 1667 u32 hlen; 1668 1669 hlen = vmxnet3_get_hdr_len(adapter, skb, 1670 (union Vmxnet3_GenericDesc *)rcd); 1671 if (hlen == 0) 1672 goto not_lro; 1673 1674 skb_shinfo(skb)->gso_type = 1675 rcd->v4 ? SKB_GSO_TCPV4 : SKB_GSO_TCPV6; 1676 if (segCnt != 0) { 1677 skb_shinfo(skb)->gso_segs = segCnt; 1678 skb_shinfo(skb)->gso_size = 1679 DIV_ROUND_UP(skb->len - 1680 hlen, segCnt); 1681 } else { 1682 skb_shinfo(skb)->gso_size = mtu - hlen; 1683 } 1684 } 1685 not_lro: 1686 if (unlikely(rcd->ts)) 1687 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), rcd->tci); 1688 1689 /* Use GRO callback if UPT is enabled */ 1690 if ((adapter->netdev->features & NETIF_F_LRO) && 1691 !rq->shared->updateRxProd) 1692 netif_receive_skb(skb); 1693 else 1694 napi_gro_receive(&rq->napi, skb); 1695 1696 ctx->skb = NULL; 1697 encap_lro = false; 1698 num_pkts++; 1699 } 1700 1701 rcd_done: 1702 /* device may have skipped some rx descs */ 1703 ring = rq->rx_ring + ring_idx; 1704 rbi->comp_state = VMXNET3_RXD_COMP_DONE; 1705 1706 comp_offset = vmxnet3_cmd_ring_desc_avail(ring); 1707 fill_offset = (idx > ring->next2fill ? 0 : ring->size) + 1708 idx - ring->next2fill - 1; 1709 if (!ring->isOutOfOrder || fill_offset >= comp_offset) 1710 ring->next2comp = idx; 1711 num_to_alloc = vmxnet3_cmd_ring_desc_avail(ring); 1712 1713 /* Ensure that the writes to rxd->gen bits will be observed 1714 * after all other writes to rxd objects. 1715 */ 1716 dma_wmb(); 1717 1718 while (num_to_alloc) { 1719 rbi = rq->buf_info[ring_idx] + ring->next2fill; 1720 if (!(adapter->dev_caps[0] & (1UL << VMXNET3_CAP_OOORX_COMP))) 1721 goto refill_buf; 1722 if (ring_idx == 0) { 1723 /* ring0 Type1 buffers can get skipped; re-fill them */ 1724 if (rbi->buf_type != VMXNET3_RX_BUF_SKB) 1725 goto refill_buf; 1726 } 1727 if (rbi->comp_state == VMXNET3_RXD_COMP_DONE) { 1728 refill_buf: 1729 vmxnet3_getRxDesc(rxd, &ring->base[ring->next2fill].rxd, 1730 &rxCmdDesc); 1731 WARN_ON(!rxd->addr); 1732 1733 /* Recv desc is ready to be used by the device */ 1734 rxd->gen = ring->gen; 1735 vmxnet3_cmd_ring_adv_next2fill(ring); 1736 rbi->comp_state = VMXNET3_RXD_COMP_PENDING; 1737 num_to_alloc--; 1738 } else { 1739 /* rx completion hasn't occurred */ 1740 ring->isOutOfOrder = 1; 1741 break; 1742 } 1743 } 1744 1745 if (num_to_alloc == 0) { 1746 ring->isOutOfOrder = 0; 1747 } 1748 1749 /* if needed, update the register */ 1750 if (unlikely(rq->shared->updateRxProd) && (ring->next2fill & 0xf) == 0) { 1751 VMXNET3_WRITE_BAR0_REG(adapter, 1752 rxprod_reg[ring_idx] + rq->qid * 8, 1753 ring->next2fill); 1754 } 1755 1756 vmxnet3_comp_ring_adv_next2proc(&rq->comp_ring); 1757 vmxnet3_getRxComp(rcd, 1758 &rq->comp_ring.base[rq->comp_ring.next2proc].rcd, &rxComp); 1759 } 1760 1761 return num_pkts; 1762 } 1763 1764 1765 static void 1766 vmxnet3_rq_cleanup(struct vmxnet3_rx_queue *rq, 1767 struct vmxnet3_adapter *adapter) 1768 { 1769 u32 i, ring_idx; 1770 struct Vmxnet3_RxDesc *rxd; 1771 1772 /* ring has already been cleaned up */ 1773 if (!rq->rx_ring[0].base) 1774 return; 1775 1776 for (ring_idx = 0; ring_idx < 2; ring_idx++) { 1777 for (i = 0; i < rq->rx_ring[ring_idx].size; i++) { 1778 #ifdef __BIG_ENDIAN_BITFIELD 1779 struct Vmxnet3_RxDesc rxDesc; 1780 #endif 1781 vmxnet3_getRxDesc(rxd, 1782 &rq->rx_ring[ring_idx].base[i].rxd, &rxDesc); 1783 1784 if (rxd->btype == VMXNET3_RXD_BTYPE_HEAD && 1785 rq->buf_info[ring_idx][i].skb) { 1786 dma_unmap_single(&adapter->pdev->dev, rxd->addr, 1787 rxd->len, DMA_FROM_DEVICE); 1788 dev_kfree_skb(rq->buf_info[ring_idx][i].skb); 1789 rq->buf_info[ring_idx][i].skb = NULL; 1790 } else if (rxd->btype == VMXNET3_RXD_BTYPE_BODY && 1791 rq->buf_info[ring_idx][i].page) { 1792 dma_unmap_page(&adapter->pdev->dev, rxd->addr, 1793 rxd->len, DMA_FROM_DEVICE); 1794 put_page(rq->buf_info[ring_idx][i].page); 1795 rq->buf_info[ring_idx][i].page = NULL; 1796 } 1797 } 1798 1799 rq->rx_ring[ring_idx].gen = VMXNET3_INIT_GEN; 1800 rq->rx_ring[ring_idx].next2fill = 1801 rq->rx_ring[ring_idx].next2comp = 0; 1802 } 1803 1804 rq->comp_ring.gen = VMXNET3_INIT_GEN; 1805 rq->comp_ring.next2proc = 0; 1806 } 1807 1808 1809 static void 1810 vmxnet3_rq_cleanup_all(struct vmxnet3_adapter *adapter) 1811 { 1812 int i; 1813 1814 for (i = 0; i < adapter->num_rx_queues; i++) 1815 vmxnet3_rq_cleanup(&adapter->rx_queue[i], adapter); 1816 } 1817 1818 1819 static void vmxnet3_rq_destroy(struct vmxnet3_rx_queue *rq, 1820 struct vmxnet3_adapter *adapter) 1821 { 1822 int i; 1823 int j; 1824 1825 /* all rx buffers must have already been freed */ 1826 for (i = 0; i < 2; i++) { 1827 if (rq->buf_info[i]) { 1828 for (j = 0; j < rq->rx_ring[i].size; j++) 1829 BUG_ON(rq->buf_info[i][j].page != NULL); 1830 } 1831 } 1832 1833 1834 for (i = 0; i < 2; i++) { 1835 if (rq->rx_ring[i].base) { 1836 dma_free_coherent(&adapter->pdev->dev, 1837 rq->rx_ring[i].size 1838 * sizeof(struct Vmxnet3_RxDesc), 1839 rq->rx_ring[i].base, 1840 rq->rx_ring[i].basePA); 1841 rq->rx_ring[i].base = NULL; 1842 } 1843 } 1844 1845 if (rq->data_ring.base) { 1846 dma_free_coherent(&adapter->pdev->dev, 1847 rq->rx_ring[0].size * rq->data_ring.desc_size, 1848 rq->data_ring.base, rq->data_ring.basePA); 1849 rq->data_ring.base = NULL; 1850 } 1851 1852 if (rq->comp_ring.base) { 1853 dma_free_coherent(&adapter->pdev->dev, rq->comp_ring.size 1854 * sizeof(struct Vmxnet3_RxCompDesc), 1855 rq->comp_ring.base, rq->comp_ring.basePA); 1856 rq->comp_ring.base = NULL; 1857 } 1858 1859 kfree(rq->buf_info[0]); 1860 rq->buf_info[0] = NULL; 1861 rq->buf_info[1] = NULL; 1862 } 1863 1864 static void 1865 vmxnet3_rq_destroy_all_rxdataring(struct vmxnet3_adapter *adapter) 1866 { 1867 int i; 1868 1869 for (i = 0; i < adapter->num_rx_queues; i++) { 1870 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i]; 1871 1872 if (rq->data_ring.base) { 1873 dma_free_coherent(&adapter->pdev->dev, 1874 (rq->rx_ring[0].size * 1875 rq->data_ring.desc_size), 1876 rq->data_ring.base, 1877 rq->data_ring.basePA); 1878 rq->data_ring.base = NULL; 1879 rq->data_ring.desc_size = 0; 1880 } 1881 } 1882 } 1883 1884 static int 1885 vmxnet3_rq_init(struct vmxnet3_rx_queue *rq, 1886 struct vmxnet3_adapter *adapter) 1887 { 1888 int i; 1889 1890 /* initialize buf_info */ 1891 for (i = 0; i < rq->rx_ring[0].size; i++) { 1892 1893 /* 1st buf for a pkt is skbuff */ 1894 if (i % adapter->rx_buf_per_pkt == 0) { 1895 rq->buf_info[0][i].buf_type = VMXNET3_RX_BUF_SKB; 1896 rq->buf_info[0][i].len = adapter->skb_buf_size; 1897 } else { /* subsequent bufs for a pkt is frag */ 1898 rq->buf_info[0][i].buf_type = VMXNET3_RX_BUF_PAGE; 1899 rq->buf_info[0][i].len = PAGE_SIZE; 1900 } 1901 } 1902 for (i = 0; i < rq->rx_ring[1].size; i++) { 1903 rq->buf_info[1][i].buf_type = VMXNET3_RX_BUF_PAGE; 1904 rq->buf_info[1][i].len = PAGE_SIZE; 1905 } 1906 1907 /* reset internal state and allocate buffers for both rings */ 1908 for (i = 0; i < 2; i++) { 1909 rq->rx_ring[i].next2fill = rq->rx_ring[i].next2comp = 0; 1910 1911 memset(rq->rx_ring[i].base, 0, rq->rx_ring[i].size * 1912 sizeof(struct Vmxnet3_RxDesc)); 1913 rq->rx_ring[i].gen = VMXNET3_INIT_GEN; 1914 rq->rx_ring[i].isOutOfOrder = 0; 1915 } 1916 if (vmxnet3_rq_alloc_rx_buf(rq, 0, rq->rx_ring[0].size - 1, 1917 adapter) == 0) { 1918 /* at least has 1 rx buffer for the 1st ring */ 1919 return -ENOMEM; 1920 } 1921 vmxnet3_rq_alloc_rx_buf(rq, 1, rq->rx_ring[1].size - 1, adapter); 1922 1923 /* reset the comp ring */ 1924 rq->comp_ring.next2proc = 0; 1925 memset(rq->comp_ring.base, 0, rq->comp_ring.size * 1926 sizeof(struct Vmxnet3_RxCompDesc)); 1927 rq->comp_ring.gen = VMXNET3_INIT_GEN; 1928 1929 /* reset rxctx */ 1930 rq->rx_ctx.skb = NULL; 1931 1932 /* stats are not reset */ 1933 return 0; 1934 } 1935 1936 1937 static int 1938 vmxnet3_rq_init_all(struct vmxnet3_adapter *adapter) 1939 { 1940 int i, err = 0; 1941 1942 for (i = 0; i < adapter->num_rx_queues; i++) { 1943 err = vmxnet3_rq_init(&adapter->rx_queue[i], adapter); 1944 if (unlikely(err)) { 1945 dev_err(&adapter->netdev->dev, "%s: failed to " 1946 "initialize rx queue%i\n", 1947 adapter->netdev->name, i); 1948 break; 1949 } 1950 } 1951 return err; 1952 1953 } 1954 1955 1956 static int 1957 vmxnet3_rq_create(struct vmxnet3_rx_queue *rq, struct vmxnet3_adapter *adapter) 1958 { 1959 int i; 1960 size_t sz; 1961 struct vmxnet3_rx_buf_info *bi; 1962 1963 for (i = 0; i < 2; i++) { 1964 1965 sz = rq->rx_ring[i].size * sizeof(struct Vmxnet3_RxDesc); 1966 rq->rx_ring[i].base = dma_alloc_coherent( 1967 &adapter->pdev->dev, sz, 1968 &rq->rx_ring[i].basePA, 1969 GFP_KERNEL); 1970 if (!rq->rx_ring[i].base) { 1971 netdev_err(adapter->netdev, 1972 "failed to allocate rx ring %d\n", i); 1973 goto err; 1974 } 1975 } 1976 1977 if ((adapter->rxdataring_enabled) && (rq->data_ring.desc_size != 0)) { 1978 sz = rq->rx_ring[0].size * rq->data_ring.desc_size; 1979 rq->data_ring.base = 1980 dma_alloc_coherent(&adapter->pdev->dev, sz, 1981 &rq->data_ring.basePA, 1982 GFP_KERNEL); 1983 if (!rq->data_ring.base) { 1984 netdev_err(adapter->netdev, 1985 "rx data ring will be disabled\n"); 1986 adapter->rxdataring_enabled = false; 1987 } 1988 } else { 1989 rq->data_ring.base = NULL; 1990 rq->data_ring.desc_size = 0; 1991 } 1992 1993 sz = rq->comp_ring.size * sizeof(struct Vmxnet3_RxCompDesc); 1994 rq->comp_ring.base = dma_alloc_coherent(&adapter->pdev->dev, sz, 1995 &rq->comp_ring.basePA, 1996 GFP_KERNEL); 1997 if (!rq->comp_ring.base) { 1998 netdev_err(adapter->netdev, "failed to allocate rx comp ring\n"); 1999 goto err; 2000 } 2001 2002 bi = kcalloc_node(rq->rx_ring[0].size + rq->rx_ring[1].size, 2003 sizeof(rq->buf_info[0][0]), GFP_KERNEL, 2004 dev_to_node(&adapter->pdev->dev)); 2005 if (!bi) 2006 goto err; 2007 2008 rq->buf_info[0] = bi; 2009 rq->buf_info[1] = bi + rq->rx_ring[0].size; 2010 2011 return 0; 2012 2013 err: 2014 vmxnet3_rq_destroy(rq, adapter); 2015 return -ENOMEM; 2016 } 2017 2018 2019 static int 2020 vmxnet3_rq_create_all(struct vmxnet3_adapter *adapter) 2021 { 2022 int i, err = 0; 2023 2024 adapter->rxdataring_enabled = VMXNET3_VERSION_GE_3(adapter); 2025 2026 for (i = 0; i < adapter->num_rx_queues; i++) { 2027 err = vmxnet3_rq_create(&adapter->rx_queue[i], adapter); 2028 if (unlikely(err)) { 2029 dev_err(&adapter->netdev->dev, 2030 "%s: failed to create rx queue%i\n", 2031 adapter->netdev->name, i); 2032 goto err_out; 2033 } 2034 } 2035 2036 if (!adapter->rxdataring_enabled) 2037 vmxnet3_rq_destroy_all_rxdataring(adapter); 2038 2039 return err; 2040 err_out: 2041 vmxnet3_rq_destroy_all(adapter); 2042 return err; 2043 2044 } 2045 2046 /* Multiple queue aware polling function for tx and rx */ 2047 2048 static int 2049 vmxnet3_do_poll(struct vmxnet3_adapter *adapter, int budget) 2050 { 2051 int rcd_done = 0, i; 2052 if (unlikely(adapter->shared->ecr)) 2053 vmxnet3_process_events(adapter); 2054 for (i = 0; i < adapter->num_tx_queues; i++) 2055 vmxnet3_tq_tx_complete(&adapter->tx_queue[i], adapter); 2056 2057 for (i = 0; i < adapter->num_rx_queues; i++) 2058 rcd_done += vmxnet3_rq_rx_complete(&adapter->rx_queue[i], 2059 adapter, budget); 2060 return rcd_done; 2061 } 2062 2063 2064 static int 2065 vmxnet3_poll(struct napi_struct *napi, int budget) 2066 { 2067 struct vmxnet3_rx_queue *rx_queue = container_of(napi, 2068 struct vmxnet3_rx_queue, napi); 2069 int rxd_done; 2070 2071 rxd_done = vmxnet3_do_poll(rx_queue->adapter, budget); 2072 2073 if (rxd_done < budget) { 2074 napi_complete_done(napi, rxd_done); 2075 vmxnet3_enable_all_intrs(rx_queue->adapter); 2076 } 2077 return rxd_done; 2078 } 2079 2080 /* 2081 * NAPI polling function for MSI-X mode with multiple Rx queues 2082 * Returns the # of the NAPI credit consumed (# of rx descriptors processed) 2083 */ 2084 2085 static int 2086 vmxnet3_poll_rx_only(struct napi_struct *napi, int budget) 2087 { 2088 struct vmxnet3_rx_queue *rq = container_of(napi, 2089 struct vmxnet3_rx_queue, napi); 2090 struct vmxnet3_adapter *adapter = rq->adapter; 2091 int rxd_done; 2092 2093 /* When sharing interrupt with corresponding tx queue, process 2094 * tx completions in that queue as well 2095 */ 2096 if (adapter->share_intr == VMXNET3_INTR_BUDDYSHARE) { 2097 struct vmxnet3_tx_queue *tq = 2098 &adapter->tx_queue[rq - adapter->rx_queue]; 2099 vmxnet3_tq_tx_complete(tq, adapter); 2100 } 2101 2102 rxd_done = vmxnet3_rq_rx_complete(rq, adapter, budget); 2103 2104 if (rxd_done < budget) { 2105 napi_complete_done(napi, rxd_done); 2106 vmxnet3_enable_intr(adapter, rq->comp_ring.intr_idx); 2107 } 2108 return rxd_done; 2109 } 2110 2111 2112 #ifdef CONFIG_PCI_MSI 2113 2114 /* 2115 * Handle completion interrupts on tx queues 2116 * Returns whether or not the intr is handled 2117 */ 2118 2119 static irqreturn_t 2120 vmxnet3_msix_tx(int irq, void *data) 2121 { 2122 struct vmxnet3_tx_queue *tq = data; 2123 struct vmxnet3_adapter *adapter = tq->adapter; 2124 2125 if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE) 2126 vmxnet3_disable_intr(adapter, tq->comp_ring.intr_idx); 2127 2128 /* Handle the case where only one irq is allocate for all tx queues */ 2129 if (adapter->share_intr == VMXNET3_INTR_TXSHARE) { 2130 int i; 2131 for (i = 0; i < adapter->num_tx_queues; i++) { 2132 struct vmxnet3_tx_queue *txq = &adapter->tx_queue[i]; 2133 vmxnet3_tq_tx_complete(txq, adapter); 2134 } 2135 } else { 2136 vmxnet3_tq_tx_complete(tq, adapter); 2137 } 2138 vmxnet3_enable_intr(adapter, tq->comp_ring.intr_idx); 2139 2140 return IRQ_HANDLED; 2141 } 2142 2143 2144 /* 2145 * Handle completion interrupts on rx queues. Returns whether or not the 2146 * intr is handled 2147 */ 2148 2149 static irqreturn_t 2150 vmxnet3_msix_rx(int irq, void *data) 2151 { 2152 struct vmxnet3_rx_queue *rq = data; 2153 struct vmxnet3_adapter *adapter = rq->adapter; 2154 2155 /* disable intr if needed */ 2156 if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE) 2157 vmxnet3_disable_intr(adapter, rq->comp_ring.intr_idx); 2158 napi_schedule(&rq->napi); 2159 2160 return IRQ_HANDLED; 2161 } 2162 2163 /* 2164 *---------------------------------------------------------------------------- 2165 * 2166 * vmxnet3_msix_event -- 2167 * 2168 * vmxnet3 msix event intr handler 2169 * 2170 * Result: 2171 * whether or not the intr is handled 2172 * 2173 *---------------------------------------------------------------------------- 2174 */ 2175 2176 static irqreturn_t 2177 vmxnet3_msix_event(int irq, void *data) 2178 { 2179 struct net_device *dev = data; 2180 struct vmxnet3_adapter *adapter = netdev_priv(dev); 2181 2182 /* disable intr if needed */ 2183 if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE) 2184 vmxnet3_disable_intr(adapter, adapter->intr.event_intr_idx); 2185 2186 if (adapter->shared->ecr) 2187 vmxnet3_process_events(adapter); 2188 2189 vmxnet3_enable_intr(adapter, adapter->intr.event_intr_idx); 2190 2191 return IRQ_HANDLED; 2192 } 2193 2194 #endif /* CONFIG_PCI_MSI */ 2195 2196 2197 /* Interrupt handler for vmxnet3 */ 2198 static irqreturn_t 2199 vmxnet3_intr(int irq, void *dev_id) 2200 { 2201 struct net_device *dev = dev_id; 2202 struct vmxnet3_adapter *adapter = netdev_priv(dev); 2203 2204 if (adapter->intr.type == VMXNET3_IT_INTX) { 2205 u32 icr = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_ICR); 2206 if (unlikely(icr == 0)) 2207 /* not ours */ 2208 return IRQ_NONE; 2209 } 2210 2211 2212 /* disable intr if needed */ 2213 if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE) 2214 vmxnet3_disable_all_intrs(adapter); 2215 2216 napi_schedule(&adapter->rx_queue[0].napi); 2217 2218 return IRQ_HANDLED; 2219 } 2220 2221 #ifdef CONFIG_NET_POLL_CONTROLLER 2222 2223 /* netpoll callback. */ 2224 static void 2225 vmxnet3_netpoll(struct net_device *netdev) 2226 { 2227 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 2228 2229 switch (adapter->intr.type) { 2230 #ifdef CONFIG_PCI_MSI 2231 case VMXNET3_IT_MSIX: { 2232 int i; 2233 for (i = 0; i < adapter->num_rx_queues; i++) 2234 vmxnet3_msix_rx(0, &adapter->rx_queue[i]); 2235 break; 2236 } 2237 #endif 2238 case VMXNET3_IT_MSI: 2239 default: 2240 vmxnet3_intr(0, adapter->netdev); 2241 break; 2242 } 2243 2244 } 2245 #endif /* CONFIG_NET_POLL_CONTROLLER */ 2246 2247 static int 2248 vmxnet3_request_irqs(struct vmxnet3_adapter *adapter) 2249 { 2250 struct vmxnet3_intr *intr = &adapter->intr; 2251 int err = 0, i; 2252 int vector = 0; 2253 2254 #ifdef CONFIG_PCI_MSI 2255 if (adapter->intr.type == VMXNET3_IT_MSIX) { 2256 for (i = 0; i < adapter->num_tx_queues; i++) { 2257 if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE) { 2258 sprintf(adapter->tx_queue[i].name, "%s-tx-%d", 2259 adapter->netdev->name, vector); 2260 err = request_irq( 2261 intr->msix_entries[vector].vector, 2262 vmxnet3_msix_tx, 0, 2263 adapter->tx_queue[i].name, 2264 &adapter->tx_queue[i]); 2265 } else { 2266 sprintf(adapter->tx_queue[i].name, "%s-rxtx-%d", 2267 adapter->netdev->name, vector); 2268 } 2269 if (err) { 2270 dev_err(&adapter->netdev->dev, 2271 "Failed to request irq for MSIX, %s, " 2272 "error %d\n", 2273 adapter->tx_queue[i].name, err); 2274 return err; 2275 } 2276 2277 /* Handle the case where only 1 MSIx was allocated for 2278 * all tx queues */ 2279 if (adapter->share_intr == VMXNET3_INTR_TXSHARE) { 2280 for (; i < adapter->num_tx_queues; i++) 2281 adapter->tx_queue[i].comp_ring.intr_idx 2282 = vector; 2283 vector++; 2284 break; 2285 } else { 2286 adapter->tx_queue[i].comp_ring.intr_idx 2287 = vector++; 2288 } 2289 } 2290 if (adapter->share_intr == VMXNET3_INTR_BUDDYSHARE) 2291 vector = 0; 2292 2293 for (i = 0; i < adapter->num_rx_queues; i++) { 2294 if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE) 2295 sprintf(adapter->rx_queue[i].name, "%s-rx-%d", 2296 adapter->netdev->name, vector); 2297 else 2298 sprintf(adapter->rx_queue[i].name, "%s-rxtx-%d", 2299 adapter->netdev->name, vector); 2300 err = request_irq(intr->msix_entries[vector].vector, 2301 vmxnet3_msix_rx, 0, 2302 adapter->rx_queue[i].name, 2303 &(adapter->rx_queue[i])); 2304 if (err) { 2305 netdev_err(adapter->netdev, 2306 "Failed to request irq for MSIX, " 2307 "%s, error %d\n", 2308 adapter->rx_queue[i].name, err); 2309 return err; 2310 } 2311 2312 adapter->rx_queue[i].comp_ring.intr_idx = vector++; 2313 } 2314 2315 sprintf(intr->event_msi_vector_name, "%s-event-%d", 2316 adapter->netdev->name, vector); 2317 err = request_irq(intr->msix_entries[vector].vector, 2318 vmxnet3_msix_event, 0, 2319 intr->event_msi_vector_name, adapter->netdev); 2320 intr->event_intr_idx = vector; 2321 2322 } else if (intr->type == VMXNET3_IT_MSI) { 2323 adapter->num_rx_queues = 1; 2324 err = request_irq(adapter->pdev->irq, vmxnet3_intr, 0, 2325 adapter->netdev->name, adapter->netdev); 2326 } else { 2327 #endif 2328 adapter->num_rx_queues = 1; 2329 err = request_irq(adapter->pdev->irq, vmxnet3_intr, 2330 IRQF_SHARED, adapter->netdev->name, 2331 adapter->netdev); 2332 #ifdef CONFIG_PCI_MSI 2333 } 2334 #endif 2335 intr->num_intrs = vector + 1; 2336 if (err) { 2337 netdev_err(adapter->netdev, 2338 "Failed to request irq (intr type:%d), error %d\n", 2339 intr->type, err); 2340 } else { 2341 /* Number of rx queues will not change after this */ 2342 for (i = 0; i < adapter->num_rx_queues; i++) { 2343 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i]; 2344 rq->qid = i; 2345 rq->qid2 = i + adapter->num_rx_queues; 2346 rq->dataRingQid = i + 2 * adapter->num_rx_queues; 2347 } 2348 2349 /* init our intr settings */ 2350 for (i = 0; i < intr->num_intrs; i++) 2351 intr->mod_levels[i] = UPT1_IML_ADAPTIVE; 2352 if (adapter->intr.type != VMXNET3_IT_MSIX) { 2353 adapter->intr.event_intr_idx = 0; 2354 for (i = 0; i < adapter->num_tx_queues; i++) 2355 adapter->tx_queue[i].comp_ring.intr_idx = 0; 2356 adapter->rx_queue[0].comp_ring.intr_idx = 0; 2357 } 2358 2359 netdev_info(adapter->netdev, 2360 "intr type %u, mode %u, %u vectors allocated\n", 2361 intr->type, intr->mask_mode, intr->num_intrs); 2362 } 2363 2364 return err; 2365 } 2366 2367 2368 static void 2369 vmxnet3_free_irqs(struct vmxnet3_adapter *adapter) 2370 { 2371 struct vmxnet3_intr *intr = &adapter->intr; 2372 BUG_ON(intr->type == VMXNET3_IT_AUTO || intr->num_intrs <= 0); 2373 2374 switch (intr->type) { 2375 #ifdef CONFIG_PCI_MSI 2376 case VMXNET3_IT_MSIX: 2377 { 2378 int i, vector = 0; 2379 2380 if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE) { 2381 for (i = 0; i < adapter->num_tx_queues; i++) { 2382 free_irq(intr->msix_entries[vector++].vector, 2383 &(adapter->tx_queue[i])); 2384 if (adapter->share_intr == VMXNET3_INTR_TXSHARE) 2385 break; 2386 } 2387 } 2388 2389 for (i = 0; i < adapter->num_rx_queues; i++) { 2390 free_irq(intr->msix_entries[vector++].vector, 2391 &(adapter->rx_queue[i])); 2392 } 2393 2394 free_irq(intr->msix_entries[vector].vector, 2395 adapter->netdev); 2396 BUG_ON(vector >= intr->num_intrs); 2397 break; 2398 } 2399 #endif 2400 case VMXNET3_IT_MSI: 2401 free_irq(adapter->pdev->irq, adapter->netdev); 2402 break; 2403 case VMXNET3_IT_INTX: 2404 free_irq(adapter->pdev->irq, adapter->netdev); 2405 break; 2406 default: 2407 BUG(); 2408 } 2409 } 2410 2411 2412 static void 2413 vmxnet3_restore_vlan(struct vmxnet3_adapter *adapter) 2414 { 2415 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable; 2416 u16 vid; 2417 2418 /* allow untagged pkts */ 2419 VMXNET3_SET_VFTABLE_ENTRY(vfTable, 0); 2420 2421 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID) 2422 VMXNET3_SET_VFTABLE_ENTRY(vfTable, vid); 2423 } 2424 2425 2426 static int 2427 vmxnet3_vlan_rx_add_vid(struct net_device *netdev, __be16 proto, u16 vid) 2428 { 2429 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 2430 2431 if (!(netdev->flags & IFF_PROMISC)) { 2432 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable; 2433 unsigned long flags; 2434 2435 VMXNET3_SET_VFTABLE_ENTRY(vfTable, vid); 2436 spin_lock_irqsave(&adapter->cmd_lock, flags); 2437 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 2438 VMXNET3_CMD_UPDATE_VLAN_FILTERS); 2439 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 2440 } 2441 2442 set_bit(vid, adapter->active_vlans); 2443 2444 return 0; 2445 } 2446 2447 2448 static int 2449 vmxnet3_vlan_rx_kill_vid(struct net_device *netdev, __be16 proto, u16 vid) 2450 { 2451 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 2452 2453 if (!(netdev->flags & IFF_PROMISC)) { 2454 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable; 2455 unsigned long flags; 2456 2457 VMXNET3_CLEAR_VFTABLE_ENTRY(vfTable, vid); 2458 spin_lock_irqsave(&adapter->cmd_lock, flags); 2459 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 2460 VMXNET3_CMD_UPDATE_VLAN_FILTERS); 2461 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 2462 } 2463 2464 clear_bit(vid, adapter->active_vlans); 2465 2466 return 0; 2467 } 2468 2469 2470 static u8 * 2471 vmxnet3_copy_mc(struct net_device *netdev) 2472 { 2473 u8 *buf = NULL; 2474 u32 sz = netdev_mc_count(netdev) * ETH_ALEN; 2475 2476 /* struct Vmxnet3_RxFilterConf.mfTableLen is u16. */ 2477 if (sz <= 0xffff) { 2478 /* We may be called with BH disabled */ 2479 buf = kmalloc(sz, GFP_ATOMIC); 2480 if (buf) { 2481 struct netdev_hw_addr *ha; 2482 int i = 0; 2483 2484 netdev_for_each_mc_addr(ha, netdev) 2485 memcpy(buf + i++ * ETH_ALEN, ha->addr, 2486 ETH_ALEN); 2487 } 2488 } 2489 return buf; 2490 } 2491 2492 2493 static void 2494 vmxnet3_set_mc(struct net_device *netdev) 2495 { 2496 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 2497 unsigned long flags; 2498 struct Vmxnet3_RxFilterConf *rxConf = 2499 &adapter->shared->devRead.rxFilterConf; 2500 u8 *new_table = NULL; 2501 dma_addr_t new_table_pa = 0; 2502 bool new_table_pa_valid = false; 2503 u32 new_mode = VMXNET3_RXM_UCAST; 2504 2505 if (netdev->flags & IFF_PROMISC) { 2506 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable; 2507 memset(vfTable, 0, VMXNET3_VFT_SIZE * sizeof(*vfTable)); 2508 2509 new_mode |= VMXNET3_RXM_PROMISC; 2510 } else { 2511 vmxnet3_restore_vlan(adapter); 2512 } 2513 2514 if (netdev->flags & IFF_BROADCAST) 2515 new_mode |= VMXNET3_RXM_BCAST; 2516 2517 if (netdev->flags & IFF_ALLMULTI) 2518 new_mode |= VMXNET3_RXM_ALL_MULTI; 2519 else 2520 if (!netdev_mc_empty(netdev)) { 2521 new_table = vmxnet3_copy_mc(netdev); 2522 if (new_table) { 2523 size_t sz = netdev_mc_count(netdev) * ETH_ALEN; 2524 2525 rxConf->mfTableLen = cpu_to_le16(sz); 2526 new_table_pa = dma_map_single( 2527 &adapter->pdev->dev, 2528 new_table, 2529 sz, 2530 DMA_TO_DEVICE); 2531 if (!dma_mapping_error(&adapter->pdev->dev, 2532 new_table_pa)) { 2533 new_mode |= VMXNET3_RXM_MCAST; 2534 new_table_pa_valid = true; 2535 rxConf->mfTablePA = cpu_to_le64( 2536 new_table_pa); 2537 } 2538 } 2539 if (!new_table_pa_valid) { 2540 netdev_info(netdev, 2541 "failed to copy mcast list, setting ALL_MULTI\n"); 2542 new_mode |= VMXNET3_RXM_ALL_MULTI; 2543 } 2544 } 2545 2546 if (!(new_mode & VMXNET3_RXM_MCAST)) { 2547 rxConf->mfTableLen = 0; 2548 rxConf->mfTablePA = 0; 2549 } 2550 2551 spin_lock_irqsave(&adapter->cmd_lock, flags); 2552 if (new_mode != rxConf->rxMode) { 2553 rxConf->rxMode = cpu_to_le32(new_mode); 2554 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 2555 VMXNET3_CMD_UPDATE_RX_MODE); 2556 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 2557 VMXNET3_CMD_UPDATE_VLAN_FILTERS); 2558 } 2559 2560 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 2561 VMXNET3_CMD_UPDATE_MAC_FILTERS); 2562 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 2563 2564 if (new_table_pa_valid) 2565 dma_unmap_single(&adapter->pdev->dev, new_table_pa, 2566 rxConf->mfTableLen, DMA_TO_DEVICE); 2567 kfree(new_table); 2568 } 2569 2570 void 2571 vmxnet3_rq_destroy_all(struct vmxnet3_adapter *adapter) 2572 { 2573 int i; 2574 2575 for (i = 0; i < adapter->num_rx_queues; i++) 2576 vmxnet3_rq_destroy(&adapter->rx_queue[i], adapter); 2577 } 2578 2579 2580 /* 2581 * Set up driver_shared based on settings in adapter. 2582 */ 2583 2584 static void 2585 vmxnet3_setup_driver_shared(struct vmxnet3_adapter *adapter) 2586 { 2587 struct Vmxnet3_DriverShared *shared = adapter->shared; 2588 struct Vmxnet3_DSDevRead *devRead = &shared->devRead; 2589 struct Vmxnet3_DSDevReadExt *devReadExt = &shared->devReadExt; 2590 struct Vmxnet3_TxQueueConf *tqc; 2591 struct Vmxnet3_RxQueueConf *rqc; 2592 int i; 2593 2594 memset(shared, 0, sizeof(*shared)); 2595 2596 /* driver settings */ 2597 shared->magic = cpu_to_le32(VMXNET3_REV1_MAGIC); 2598 devRead->misc.driverInfo.version = cpu_to_le32( 2599 VMXNET3_DRIVER_VERSION_NUM); 2600 devRead->misc.driverInfo.gos.gosBits = (sizeof(void *) == 4 ? 2601 VMXNET3_GOS_BITS_32 : VMXNET3_GOS_BITS_64); 2602 devRead->misc.driverInfo.gos.gosType = VMXNET3_GOS_TYPE_LINUX; 2603 *((u32 *)&devRead->misc.driverInfo.gos) = cpu_to_le32( 2604 *((u32 *)&devRead->misc.driverInfo.gos)); 2605 devRead->misc.driverInfo.vmxnet3RevSpt = cpu_to_le32(1); 2606 devRead->misc.driverInfo.uptVerSpt = cpu_to_le32(1); 2607 2608 devRead->misc.ddPA = cpu_to_le64(adapter->adapter_pa); 2609 devRead->misc.ddLen = cpu_to_le32(sizeof(struct vmxnet3_adapter)); 2610 2611 /* set up feature flags */ 2612 if (adapter->netdev->features & NETIF_F_RXCSUM) 2613 devRead->misc.uptFeatures |= UPT1_F_RXCSUM; 2614 2615 if (adapter->netdev->features & NETIF_F_LRO) { 2616 devRead->misc.uptFeatures |= UPT1_F_LRO; 2617 devRead->misc.maxNumRxSG = cpu_to_le16(1 + MAX_SKB_FRAGS); 2618 } 2619 if (adapter->netdev->features & NETIF_F_HW_VLAN_CTAG_RX) 2620 devRead->misc.uptFeatures |= UPT1_F_RXVLAN; 2621 2622 if (adapter->netdev->features & (NETIF_F_GSO_UDP_TUNNEL | 2623 NETIF_F_GSO_UDP_TUNNEL_CSUM)) 2624 devRead->misc.uptFeatures |= UPT1_F_RXINNEROFLD; 2625 2626 devRead->misc.mtu = cpu_to_le32(adapter->netdev->mtu); 2627 devRead->misc.queueDescPA = cpu_to_le64(adapter->queue_desc_pa); 2628 devRead->misc.queueDescLen = cpu_to_le32( 2629 adapter->num_tx_queues * sizeof(struct Vmxnet3_TxQueueDesc) + 2630 adapter->num_rx_queues * sizeof(struct Vmxnet3_RxQueueDesc)); 2631 2632 /* tx queue settings */ 2633 devRead->misc.numTxQueues = adapter->num_tx_queues; 2634 for (i = 0; i < adapter->num_tx_queues; i++) { 2635 struct vmxnet3_tx_queue *tq = &adapter->tx_queue[i]; 2636 BUG_ON(adapter->tx_queue[i].tx_ring.base == NULL); 2637 tqc = &adapter->tqd_start[i].conf; 2638 tqc->txRingBasePA = cpu_to_le64(tq->tx_ring.basePA); 2639 tqc->dataRingBasePA = cpu_to_le64(tq->data_ring.basePA); 2640 tqc->compRingBasePA = cpu_to_le64(tq->comp_ring.basePA); 2641 tqc->ddPA = cpu_to_le64(~0ULL); 2642 tqc->txRingSize = cpu_to_le32(tq->tx_ring.size); 2643 tqc->dataRingSize = cpu_to_le32(tq->data_ring.size); 2644 tqc->txDataRingDescSize = cpu_to_le32(tq->txdata_desc_size); 2645 tqc->compRingSize = cpu_to_le32(tq->comp_ring.size); 2646 tqc->ddLen = cpu_to_le32(0); 2647 tqc->intrIdx = tq->comp_ring.intr_idx; 2648 } 2649 2650 /* rx queue settings */ 2651 devRead->misc.numRxQueues = adapter->num_rx_queues; 2652 for (i = 0; i < adapter->num_rx_queues; i++) { 2653 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i]; 2654 rqc = &adapter->rqd_start[i].conf; 2655 rqc->rxRingBasePA[0] = cpu_to_le64(rq->rx_ring[0].basePA); 2656 rqc->rxRingBasePA[1] = cpu_to_le64(rq->rx_ring[1].basePA); 2657 rqc->compRingBasePA = cpu_to_le64(rq->comp_ring.basePA); 2658 rqc->ddPA = cpu_to_le64(~0ULL); 2659 rqc->rxRingSize[0] = cpu_to_le32(rq->rx_ring[0].size); 2660 rqc->rxRingSize[1] = cpu_to_le32(rq->rx_ring[1].size); 2661 rqc->compRingSize = cpu_to_le32(rq->comp_ring.size); 2662 rqc->ddLen = cpu_to_le32(0); 2663 rqc->intrIdx = rq->comp_ring.intr_idx; 2664 if (VMXNET3_VERSION_GE_3(adapter)) { 2665 rqc->rxDataRingBasePA = 2666 cpu_to_le64(rq->data_ring.basePA); 2667 rqc->rxDataRingDescSize = 2668 cpu_to_le16(rq->data_ring.desc_size); 2669 } 2670 } 2671 2672 #ifdef VMXNET3_RSS 2673 memset(adapter->rss_conf, 0, sizeof(*adapter->rss_conf)); 2674 2675 if (adapter->rss) { 2676 struct UPT1_RSSConf *rssConf = adapter->rss_conf; 2677 2678 devRead->misc.uptFeatures |= UPT1_F_RSS; 2679 devRead->misc.numRxQueues = adapter->num_rx_queues; 2680 rssConf->hashType = UPT1_RSS_HASH_TYPE_TCP_IPV4 | 2681 UPT1_RSS_HASH_TYPE_IPV4 | 2682 UPT1_RSS_HASH_TYPE_TCP_IPV6 | 2683 UPT1_RSS_HASH_TYPE_IPV6; 2684 rssConf->hashFunc = UPT1_RSS_HASH_FUNC_TOEPLITZ; 2685 rssConf->hashKeySize = UPT1_RSS_MAX_KEY_SIZE; 2686 rssConf->indTableSize = VMXNET3_RSS_IND_TABLE_SIZE; 2687 netdev_rss_key_fill(rssConf->hashKey, sizeof(rssConf->hashKey)); 2688 2689 for (i = 0; i < rssConf->indTableSize; i++) 2690 rssConf->indTable[i] = ethtool_rxfh_indir_default( 2691 i, adapter->num_rx_queues); 2692 2693 devRead->rssConfDesc.confVer = 1; 2694 devRead->rssConfDesc.confLen = cpu_to_le32(sizeof(*rssConf)); 2695 devRead->rssConfDesc.confPA = 2696 cpu_to_le64(adapter->rss_conf_pa); 2697 } 2698 2699 #endif /* VMXNET3_RSS */ 2700 2701 /* intr settings */ 2702 if (!VMXNET3_VERSION_GE_6(adapter) || 2703 !adapter->queuesExtEnabled) { 2704 devRead->intrConf.autoMask = adapter->intr.mask_mode == 2705 VMXNET3_IMM_AUTO; 2706 devRead->intrConf.numIntrs = adapter->intr.num_intrs; 2707 for (i = 0; i < adapter->intr.num_intrs; i++) 2708 devRead->intrConf.modLevels[i] = adapter->intr.mod_levels[i]; 2709 2710 devRead->intrConf.eventIntrIdx = adapter->intr.event_intr_idx; 2711 devRead->intrConf.intrCtrl |= cpu_to_le32(VMXNET3_IC_DISABLE_ALL); 2712 } else { 2713 devReadExt->intrConfExt.autoMask = adapter->intr.mask_mode == 2714 VMXNET3_IMM_AUTO; 2715 devReadExt->intrConfExt.numIntrs = adapter->intr.num_intrs; 2716 for (i = 0; i < adapter->intr.num_intrs; i++) 2717 devReadExt->intrConfExt.modLevels[i] = adapter->intr.mod_levels[i]; 2718 2719 devReadExt->intrConfExt.eventIntrIdx = adapter->intr.event_intr_idx; 2720 devReadExt->intrConfExt.intrCtrl |= cpu_to_le32(VMXNET3_IC_DISABLE_ALL); 2721 } 2722 2723 /* rx filter settings */ 2724 devRead->rxFilterConf.rxMode = 0; 2725 vmxnet3_restore_vlan(adapter); 2726 vmxnet3_write_mac_addr(adapter, adapter->netdev->dev_addr); 2727 2728 /* the rest are already zeroed */ 2729 } 2730 2731 static void 2732 vmxnet3_init_bufsize(struct vmxnet3_adapter *adapter) 2733 { 2734 struct Vmxnet3_DriverShared *shared = adapter->shared; 2735 union Vmxnet3_CmdInfo *cmdInfo = &shared->cu.cmdInfo; 2736 unsigned long flags; 2737 2738 if (!VMXNET3_VERSION_GE_7(adapter)) 2739 return; 2740 2741 cmdInfo->ringBufSize = adapter->ringBufSize; 2742 spin_lock_irqsave(&adapter->cmd_lock, flags); 2743 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 2744 VMXNET3_CMD_SET_RING_BUFFER_SIZE); 2745 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 2746 } 2747 2748 static void 2749 vmxnet3_init_coalesce(struct vmxnet3_adapter *adapter) 2750 { 2751 struct Vmxnet3_DriverShared *shared = adapter->shared; 2752 union Vmxnet3_CmdInfo *cmdInfo = &shared->cu.cmdInfo; 2753 unsigned long flags; 2754 2755 if (!VMXNET3_VERSION_GE_3(adapter)) 2756 return; 2757 2758 spin_lock_irqsave(&adapter->cmd_lock, flags); 2759 cmdInfo->varConf.confVer = 1; 2760 cmdInfo->varConf.confLen = 2761 cpu_to_le32(sizeof(*adapter->coal_conf)); 2762 cmdInfo->varConf.confPA = cpu_to_le64(adapter->coal_conf_pa); 2763 2764 if (adapter->default_coal_mode) { 2765 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 2766 VMXNET3_CMD_GET_COALESCE); 2767 } else { 2768 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 2769 VMXNET3_CMD_SET_COALESCE); 2770 } 2771 2772 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 2773 } 2774 2775 static void 2776 vmxnet3_init_rssfields(struct vmxnet3_adapter *adapter) 2777 { 2778 struct Vmxnet3_DriverShared *shared = adapter->shared; 2779 union Vmxnet3_CmdInfo *cmdInfo = &shared->cu.cmdInfo; 2780 unsigned long flags; 2781 2782 if (!VMXNET3_VERSION_GE_4(adapter)) 2783 return; 2784 2785 spin_lock_irqsave(&adapter->cmd_lock, flags); 2786 2787 if (adapter->default_rss_fields) { 2788 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 2789 VMXNET3_CMD_GET_RSS_FIELDS); 2790 adapter->rss_fields = 2791 VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD); 2792 } else { 2793 if (VMXNET3_VERSION_GE_7(adapter)) { 2794 if ((adapter->rss_fields & VMXNET3_RSS_FIELDS_UDPIP4 || 2795 adapter->rss_fields & VMXNET3_RSS_FIELDS_UDPIP6) && 2796 vmxnet3_check_ptcapability(adapter->ptcap_supported[0], 2797 VMXNET3_CAP_UDP_RSS)) { 2798 adapter->dev_caps[0] |= 1UL << VMXNET3_CAP_UDP_RSS; 2799 } else { 2800 adapter->dev_caps[0] &= ~(1UL << VMXNET3_CAP_UDP_RSS); 2801 } 2802 2803 if ((adapter->rss_fields & VMXNET3_RSS_FIELDS_ESPIP4) && 2804 vmxnet3_check_ptcapability(adapter->ptcap_supported[0], 2805 VMXNET3_CAP_ESP_RSS_IPV4)) { 2806 adapter->dev_caps[0] |= 1UL << VMXNET3_CAP_ESP_RSS_IPV4; 2807 } else { 2808 adapter->dev_caps[0] &= ~(1UL << VMXNET3_CAP_ESP_RSS_IPV4); 2809 } 2810 2811 if ((adapter->rss_fields & VMXNET3_RSS_FIELDS_ESPIP6) && 2812 vmxnet3_check_ptcapability(adapter->ptcap_supported[0], 2813 VMXNET3_CAP_ESP_RSS_IPV6)) { 2814 adapter->dev_caps[0] |= 1UL << VMXNET3_CAP_ESP_RSS_IPV6; 2815 } else { 2816 adapter->dev_caps[0] &= ~(1UL << VMXNET3_CAP_ESP_RSS_IPV6); 2817 } 2818 2819 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DCR, adapter->dev_caps[0]); 2820 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_GET_DCR0_REG); 2821 adapter->dev_caps[0] = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD); 2822 } 2823 cmdInfo->setRssFields = adapter->rss_fields; 2824 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 2825 VMXNET3_CMD_SET_RSS_FIELDS); 2826 /* Not all requested RSS may get applied, so get and 2827 * cache what was actually applied. 2828 */ 2829 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 2830 VMXNET3_CMD_GET_RSS_FIELDS); 2831 adapter->rss_fields = 2832 VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD); 2833 } 2834 2835 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 2836 } 2837 2838 int 2839 vmxnet3_activate_dev(struct vmxnet3_adapter *adapter) 2840 { 2841 int err, i; 2842 u32 ret; 2843 unsigned long flags; 2844 2845 netdev_dbg(adapter->netdev, "%s: skb_buf_size %d, rx_buf_per_pkt %d," 2846 " ring sizes %u %u %u\n", adapter->netdev->name, 2847 adapter->skb_buf_size, adapter->rx_buf_per_pkt, 2848 adapter->tx_queue[0].tx_ring.size, 2849 adapter->rx_queue[0].rx_ring[0].size, 2850 adapter->rx_queue[0].rx_ring[1].size); 2851 2852 vmxnet3_tq_init_all(adapter); 2853 err = vmxnet3_rq_init_all(adapter); 2854 if (err) { 2855 netdev_err(adapter->netdev, 2856 "Failed to init rx queue error %d\n", err); 2857 goto rq_err; 2858 } 2859 2860 err = vmxnet3_request_irqs(adapter); 2861 if (err) { 2862 netdev_err(adapter->netdev, 2863 "Failed to setup irq for error %d\n", err); 2864 goto irq_err; 2865 } 2866 2867 vmxnet3_setup_driver_shared(adapter); 2868 2869 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAL, VMXNET3_GET_ADDR_LO( 2870 adapter->shared_pa)); 2871 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAH, VMXNET3_GET_ADDR_HI( 2872 adapter->shared_pa)); 2873 spin_lock_irqsave(&adapter->cmd_lock, flags); 2874 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 2875 VMXNET3_CMD_ACTIVATE_DEV); 2876 ret = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD); 2877 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 2878 2879 if (ret != 0) { 2880 netdev_err(adapter->netdev, 2881 "Failed to activate dev: error %u\n", ret); 2882 err = -EINVAL; 2883 goto activate_err; 2884 } 2885 2886 vmxnet3_init_bufsize(adapter); 2887 vmxnet3_init_coalesce(adapter); 2888 vmxnet3_init_rssfields(adapter); 2889 2890 for (i = 0; i < adapter->num_rx_queues; i++) { 2891 VMXNET3_WRITE_BAR0_REG(adapter, 2892 adapter->rx_prod_offset + i * VMXNET3_REG_ALIGN, 2893 adapter->rx_queue[i].rx_ring[0].next2fill); 2894 VMXNET3_WRITE_BAR0_REG(adapter, (adapter->rx_prod2_offset + 2895 (i * VMXNET3_REG_ALIGN)), 2896 adapter->rx_queue[i].rx_ring[1].next2fill); 2897 } 2898 2899 /* Apply the rx filter settins last. */ 2900 vmxnet3_set_mc(adapter->netdev); 2901 2902 /* 2903 * Check link state when first activating device. It will start the 2904 * tx queue if the link is up. 2905 */ 2906 vmxnet3_check_link(adapter, true); 2907 netif_tx_wake_all_queues(adapter->netdev); 2908 for (i = 0; i < adapter->num_rx_queues; i++) 2909 napi_enable(&adapter->rx_queue[i].napi); 2910 vmxnet3_enable_all_intrs(adapter); 2911 clear_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state); 2912 return 0; 2913 2914 activate_err: 2915 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAL, 0); 2916 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAH, 0); 2917 vmxnet3_free_irqs(adapter); 2918 irq_err: 2919 rq_err: 2920 /* free up buffers we allocated */ 2921 vmxnet3_rq_cleanup_all(adapter); 2922 return err; 2923 } 2924 2925 2926 void 2927 vmxnet3_reset_dev(struct vmxnet3_adapter *adapter) 2928 { 2929 unsigned long flags; 2930 spin_lock_irqsave(&adapter->cmd_lock, flags); 2931 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_RESET_DEV); 2932 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 2933 } 2934 2935 2936 int 2937 vmxnet3_quiesce_dev(struct vmxnet3_adapter *adapter) 2938 { 2939 int i; 2940 unsigned long flags; 2941 if (test_and_set_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state)) 2942 return 0; 2943 2944 2945 spin_lock_irqsave(&adapter->cmd_lock, flags); 2946 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 2947 VMXNET3_CMD_QUIESCE_DEV); 2948 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 2949 vmxnet3_disable_all_intrs(adapter); 2950 2951 for (i = 0; i < adapter->num_rx_queues; i++) 2952 napi_disable(&adapter->rx_queue[i].napi); 2953 netif_tx_disable(adapter->netdev); 2954 adapter->link_speed = 0; 2955 netif_carrier_off(adapter->netdev); 2956 2957 vmxnet3_tq_cleanup_all(adapter); 2958 vmxnet3_rq_cleanup_all(adapter); 2959 vmxnet3_free_irqs(adapter); 2960 return 0; 2961 } 2962 2963 2964 static void 2965 vmxnet3_write_mac_addr(struct vmxnet3_adapter *adapter, const u8 *mac) 2966 { 2967 u32 tmp; 2968 2969 tmp = *(u32 *)mac; 2970 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_MACL, tmp); 2971 2972 tmp = (mac[5] << 8) | mac[4]; 2973 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_MACH, tmp); 2974 } 2975 2976 2977 static int 2978 vmxnet3_set_mac_addr(struct net_device *netdev, void *p) 2979 { 2980 struct sockaddr *addr = p; 2981 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 2982 2983 dev_addr_set(netdev, addr->sa_data); 2984 vmxnet3_write_mac_addr(adapter, addr->sa_data); 2985 2986 return 0; 2987 } 2988 2989 2990 /* ==================== initialization and cleanup routines ============ */ 2991 2992 static int 2993 vmxnet3_alloc_pci_resources(struct vmxnet3_adapter *adapter) 2994 { 2995 int err; 2996 unsigned long mmio_start, mmio_len; 2997 struct pci_dev *pdev = adapter->pdev; 2998 2999 err = pci_enable_device(pdev); 3000 if (err) { 3001 dev_err(&pdev->dev, "Failed to enable adapter: error %d\n", err); 3002 return err; 3003 } 3004 3005 err = pci_request_selected_regions(pdev, (1 << 2) - 1, 3006 vmxnet3_driver_name); 3007 if (err) { 3008 dev_err(&pdev->dev, 3009 "Failed to request region for adapter: error %d\n", err); 3010 goto err_enable_device; 3011 } 3012 3013 pci_set_master(pdev); 3014 3015 mmio_start = pci_resource_start(pdev, 0); 3016 mmio_len = pci_resource_len(pdev, 0); 3017 adapter->hw_addr0 = ioremap(mmio_start, mmio_len); 3018 if (!adapter->hw_addr0) { 3019 dev_err(&pdev->dev, "Failed to map bar0\n"); 3020 err = -EIO; 3021 goto err_ioremap; 3022 } 3023 3024 mmio_start = pci_resource_start(pdev, 1); 3025 mmio_len = pci_resource_len(pdev, 1); 3026 adapter->hw_addr1 = ioremap(mmio_start, mmio_len); 3027 if (!adapter->hw_addr1) { 3028 dev_err(&pdev->dev, "Failed to map bar1\n"); 3029 err = -EIO; 3030 goto err_bar1; 3031 } 3032 return 0; 3033 3034 err_bar1: 3035 iounmap(adapter->hw_addr0); 3036 err_ioremap: 3037 pci_release_selected_regions(pdev, (1 << 2) - 1); 3038 err_enable_device: 3039 pci_disable_device(pdev); 3040 return err; 3041 } 3042 3043 3044 static void 3045 vmxnet3_free_pci_resources(struct vmxnet3_adapter *adapter) 3046 { 3047 BUG_ON(!adapter->pdev); 3048 3049 iounmap(adapter->hw_addr0); 3050 iounmap(adapter->hw_addr1); 3051 pci_release_selected_regions(adapter->pdev, (1 << 2) - 1); 3052 pci_disable_device(adapter->pdev); 3053 } 3054 3055 3056 static void 3057 vmxnet3_adjust_rx_ring_size(struct vmxnet3_adapter *adapter) 3058 { 3059 size_t sz, i, ring0_size, ring1_size, comp_size; 3060 /* With version7 ring1 will have only T0 buffers */ 3061 if (!VMXNET3_VERSION_GE_7(adapter)) { 3062 if (adapter->netdev->mtu <= VMXNET3_MAX_SKB_BUF_SIZE - 3063 VMXNET3_MAX_ETH_HDR_SIZE) { 3064 adapter->skb_buf_size = adapter->netdev->mtu + 3065 VMXNET3_MAX_ETH_HDR_SIZE; 3066 if (adapter->skb_buf_size < VMXNET3_MIN_T0_BUF_SIZE) 3067 adapter->skb_buf_size = VMXNET3_MIN_T0_BUF_SIZE; 3068 3069 adapter->rx_buf_per_pkt = 1; 3070 } else { 3071 adapter->skb_buf_size = VMXNET3_MAX_SKB_BUF_SIZE; 3072 sz = adapter->netdev->mtu - VMXNET3_MAX_SKB_BUF_SIZE + 3073 VMXNET3_MAX_ETH_HDR_SIZE; 3074 adapter->rx_buf_per_pkt = 1 + (sz + PAGE_SIZE - 1) / PAGE_SIZE; 3075 } 3076 } else { 3077 adapter->skb_buf_size = min((int)adapter->netdev->mtu + VMXNET3_MAX_ETH_HDR_SIZE, 3078 VMXNET3_MAX_SKB_BUF_SIZE); 3079 adapter->rx_buf_per_pkt = 1; 3080 adapter->ringBufSize.ring1BufSizeType0 = cpu_to_le16(adapter->skb_buf_size); 3081 adapter->ringBufSize.ring1BufSizeType1 = 0; 3082 adapter->ringBufSize.ring2BufSizeType1 = cpu_to_le16(PAGE_SIZE); 3083 } 3084 3085 /* 3086 * for simplicity, force the ring0 size to be a multiple of 3087 * rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN 3088 */ 3089 sz = adapter->rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN; 3090 ring0_size = adapter->rx_queue[0].rx_ring[0].size; 3091 ring0_size = (ring0_size + sz - 1) / sz * sz; 3092 ring0_size = min_t(u32, ring0_size, VMXNET3_RX_RING_MAX_SIZE / 3093 sz * sz); 3094 ring1_size = adapter->rx_queue[0].rx_ring[1].size; 3095 ring1_size = (ring1_size + sz - 1) / sz * sz; 3096 ring1_size = min_t(u32, ring1_size, VMXNET3_RX_RING2_MAX_SIZE / 3097 sz * sz); 3098 /* For v7 and later, keep ring size power of 2 for UPT */ 3099 if (VMXNET3_VERSION_GE_7(adapter)) { 3100 ring0_size = rounddown_pow_of_two(ring0_size); 3101 ring1_size = rounddown_pow_of_two(ring1_size); 3102 } 3103 comp_size = ring0_size + ring1_size; 3104 3105 for (i = 0; i < adapter->num_rx_queues; i++) { 3106 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i]; 3107 3108 rq->rx_ring[0].size = ring0_size; 3109 rq->rx_ring[1].size = ring1_size; 3110 rq->comp_ring.size = comp_size; 3111 } 3112 } 3113 3114 3115 int 3116 vmxnet3_create_queues(struct vmxnet3_adapter *adapter, u32 tx_ring_size, 3117 u32 rx_ring_size, u32 rx_ring2_size, 3118 u16 txdata_desc_size, u16 rxdata_desc_size) 3119 { 3120 int err = 0, i; 3121 3122 for (i = 0; i < adapter->num_tx_queues; i++) { 3123 struct vmxnet3_tx_queue *tq = &adapter->tx_queue[i]; 3124 tq->tx_ring.size = tx_ring_size; 3125 tq->data_ring.size = tx_ring_size; 3126 tq->comp_ring.size = tx_ring_size; 3127 tq->txdata_desc_size = txdata_desc_size; 3128 tq->shared = &adapter->tqd_start[i].ctrl; 3129 tq->stopped = true; 3130 tq->adapter = adapter; 3131 tq->qid = i; 3132 err = vmxnet3_tq_create(tq, adapter); 3133 /* 3134 * Too late to change num_tx_queues. We cannot do away with 3135 * lesser number of queues than what we asked for 3136 */ 3137 if (err) 3138 goto queue_err; 3139 } 3140 3141 adapter->rx_queue[0].rx_ring[0].size = rx_ring_size; 3142 adapter->rx_queue[0].rx_ring[1].size = rx_ring2_size; 3143 vmxnet3_adjust_rx_ring_size(adapter); 3144 3145 adapter->rxdataring_enabled = VMXNET3_VERSION_GE_3(adapter); 3146 for (i = 0; i < adapter->num_rx_queues; i++) { 3147 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i]; 3148 /* qid and qid2 for rx queues will be assigned later when num 3149 * of rx queues is finalized after allocating intrs */ 3150 rq->shared = &adapter->rqd_start[i].ctrl; 3151 rq->adapter = adapter; 3152 rq->data_ring.desc_size = rxdata_desc_size; 3153 err = vmxnet3_rq_create(rq, adapter); 3154 if (err) { 3155 if (i == 0) { 3156 netdev_err(adapter->netdev, 3157 "Could not allocate any rx queues. " 3158 "Aborting.\n"); 3159 goto queue_err; 3160 } else { 3161 netdev_info(adapter->netdev, 3162 "Number of rx queues changed " 3163 "to : %d.\n", i); 3164 adapter->num_rx_queues = i; 3165 err = 0; 3166 break; 3167 } 3168 } 3169 } 3170 3171 if (!adapter->rxdataring_enabled) 3172 vmxnet3_rq_destroy_all_rxdataring(adapter); 3173 3174 return err; 3175 queue_err: 3176 vmxnet3_tq_destroy_all(adapter); 3177 return err; 3178 } 3179 3180 static int 3181 vmxnet3_open(struct net_device *netdev) 3182 { 3183 struct vmxnet3_adapter *adapter; 3184 int err, i; 3185 3186 adapter = netdev_priv(netdev); 3187 3188 for (i = 0; i < adapter->num_tx_queues; i++) 3189 spin_lock_init(&adapter->tx_queue[i].tx_lock); 3190 3191 if (VMXNET3_VERSION_GE_3(adapter)) { 3192 unsigned long flags; 3193 u16 txdata_desc_size; 3194 3195 spin_lock_irqsave(&adapter->cmd_lock, flags); 3196 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 3197 VMXNET3_CMD_GET_TXDATA_DESC_SIZE); 3198 txdata_desc_size = VMXNET3_READ_BAR1_REG(adapter, 3199 VMXNET3_REG_CMD); 3200 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 3201 3202 if ((txdata_desc_size < VMXNET3_TXDATA_DESC_MIN_SIZE) || 3203 (txdata_desc_size > VMXNET3_TXDATA_DESC_MAX_SIZE) || 3204 (txdata_desc_size & VMXNET3_TXDATA_DESC_SIZE_MASK)) { 3205 adapter->txdata_desc_size = 3206 sizeof(struct Vmxnet3_TxDataDesc); 3207 } else { 3208 adapter->txdata_desc_size = txdata_desc_size; 3209 } 3210 } else { 3211 adapter->txdata_desc_size = sizeof(struct Vmxnet3_TxDataDesc); 3212 } 3213 3214 err = vmxnet3_create_queues(adapter, 3215 adapter->tx_ring_size, 3216 adapter->rx_ring_size, 3217 adapter->rx_ring2_size, 3218 adapter->txdata_desc_size, 3219 adapter->rxdata_desc_size); 3220 if (err) 3221 goto queue_err; 3222 3223 err = vmxnet3_activate_dev(adapter); 3224 if (err) 3225 goto activate_err; 3226 3227 return 0; 3228 3229 activate_err: 3230 vmxnet3_rq_destroy_all(adapter); 3231 vmxnet3_tq_destroy_all(adapter); 3232 queue_err: 3233 return err; 3234 } 3235 3236 3237 static int 3238 vmxnet3_close(struct net_device *netdev) 3239 { 3240 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 3241 3242 /* 3243 * Reset_work may be in the middle of resetting the device, wait for its 3244 * completion. 3245 */ 3246 while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state)) 3247 usleep_range(1000, 2000); 3248 3249 vmxnet3_quiesce_dev(adapter); 3250 3251 vmxnet3_rq_destroy_all(adapter); 3252 vmxnet3_tq_destroy_all(adapter); 3253 3254 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state); 3255 3256 3257 return 0; 3258 } 3259 3260 3261 void 3262 vmxnet3_force_close(struct vmxnet3_adapter *adapter) 3263 { 3264 int i; 3265 3266 /* 3267 * we must clear VMXNET3_STATE_BIT_RESETTING, otherwise 3268 * vmxnet3_close() will deadlock. 3269 */ 3270 BUG_ON(test_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state)); 3271 3272 /* we need to enable NAPI, otherwise dev_close will deadlock */ 3273 for (i = 0; i < adapter->num_rx_queues; i++) 3274 napi_enable(&adapter->rx_queue[i].napi); 3275 /* 3276 * Need to clear the quiesce bit to ensure that vmxnet3_close 3277 * can quiesce the device properly 3278 */ 3279 clear_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state); 3280 dev_close(adapter->netdev); 3281 } 3282 3283 3284 static int 3285 vmxnet3_change_mtu(struct net_device *netdev, int new_mtu) 3286 { 3287 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 3288 int err = 0; 3289 3290 netdev->mtu = new_mtu; 3291 3292 /* 3293 * Reset_work may be in the middle of resetting the device, wait for its 3294 * completion. 3295 */ 3296 while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state)) 3297 usleep_range(1000, 2000); 3298 3299 if (netif_running(netdev)) { 3300 vmxnet3_quiesce_dev(adapter); 3301 vmxnet3_reset_dev(adapter); 3302 3303 /* we need to re-create the rx queue based on the new mtu */ 3304 vmxnet3_rq_destroy_all(adapter); 3305 vmxnet3_adjust_rx_ring_size(adapter); 3306 err = vmxnet3_rq_create_all(adapter); 3307 if (err) { 3308 netdev_err(netdev, 3309 "failed to re-create rx queues, " 3310 " error %d. Closing it.\n", err); 3311 goto out; 3312 } 3313 3314 err = vmxnet3_activate_dev(adapter); 3315 if (err) { 3316 netdev_err(netdev, 3317 "failed to re-activate, error %d. " 3318 "Closing it\n", err); 3319 goto out; 3320 } 3321 } 3322 3323 out: 3324 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state); 3325 if (err) 3326 vmxnet3_force_close(adapter); 3327 3328 return err; 3329 } 3330 3331 3332 static void 3333 vmxnet3_declare_features(struct vmxnet3_adapter *adapter) 3334 { 3335 struct net_device *netdev = adapter->netdev; 3336 3337 netdev->hw_features = NETIF_F_SG | NETIF_F_RXCSUM | 3338 NETIF_F_HW_CSUM | NETIF_F_HW_VLAN_CTAG_TX | 3339 NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_TSO | NETIF_F_TSO6 | 3340 NETIF_F_LRO | NETIF_F_HIGHDMA; 3341 3342 if (VMXNET3_VERSION_GE_4(adapter)) { 3343 netdev->hw_features |= NETIF_F_GSO_UDP_TUNNEL | 3344 NETIF_F_GSO_UDP_TUNNEL_CSUM; 3345 3346 netdev->hw_enc_features = NETIF_F_SG | NETIF_F_RXCSUM | 3347 NETIF_F_HW_CSUM | NETIF_F_HW_VLAN_CTAG_TX | 3348 NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_TSO | NETIF_F_TSO6 | 3349 NETIF_F_LRO | NETIF_F_GSO_UDP_TUNNEL | 3350 NETIF_F_GSO_UDP_TUNNEL_CSUM; 3351 } 3352 3353 if (VMXNET3_VERSION_GE_7(adapter)) { 3354 unsigned long flags; 3355 3356 if (vmxnet3_check_ptcapability(adapter->ptcap_supported[0], 3357 VMXNET3_CAP_GENEVE_CHECKSUM_OFFLOAD)) { 3358 adapter->dev_caps[0] |= 1UL << VMXNET3_CAP_GENEVE_CHECKSUM_OFFLOAD; 3359 } 3360 if (vmxnet3_check_ptcapability(adapter->ptcap_supported[0], 3361 VMXNET3_CAP_VXLAN_CHECKSUM_OFFLOAD)) { 3362 adapter->dev_caps[0] |= 1UL << VMXNET3_CAP_VXLAN_CHECKSUM_OFFLOAD; 3363 } 3364 if (vmxnet3_check_ptcapability(adapter->ptcap_supported[0], 3365 VMXNET3_CAP_GENEVE_TSO)) { 3366 adapter->dev_caps[0] |= 1UL << VMXNET3_CAP_GENEVE_TSO; 3367 } 3368 if (vmxnet3_check_ptcapability(adapter->ptcap_supported[0], 3369 VMXNET3_CAP_VXLAN_TSO)) { 3370 adapter->dev_caps[0] |= 1UL << VMXNET3_CAP_VXLAN_TSO; 3371 } 3372 if (vmxnet3_check_ptcapability(adapter->ptcap_supported[0], 3373 VMXNET3_CAP_GENEVE_OUTER_CHECKSUM_OFFLOAD)) { 3374 adapter->dev_caps[0] |= 1UL << VMXNET3_CAP_GENEVE_OUTER_CHECKSUM_OFFLOAD; 3375 } 3376 if (vmxnet3_check_ptcapability(adapter->ptcap_supported[0], 3377 VMXNET3_CAP_VXLAN_OUTER_CHECKSUM_OFFLOAD)) { 3378 adapter->dev_caps[0] |= 1UL << VMXNET3_CAP_VXLAN_OUTER_CHECKSUM_OFFLOAD; 3379 } 3380 3381 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DCR, adapter->dev_caps[0]); 3382 spin_lock_irqsave(&adapter->cmd_lock, flags); 3383 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_GET_DCR0_REG); 3384 adapter->dev_caps[0] = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD); 3385 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 3386 3387 if (!(adapter->dev_caps[0] & (1UL << VMXNET3_CAP_GENEVE_CHECKSUM_OFFLOAD)) && 3388 !(adapter->dev_caps[0] & (1UL << VMXNET3_CAP_VXLAN_CHECKSUM_OFFLOAD)) && 3389 !(adapter->dev_caps[0] & (1UL << VMXNET3_CAP_GENEVE_TSO)) && 3390 !(adapter->dev_caps[0] & (1UL << VMXNET3_CAP_VXLAN_TSO))) { 3391 netdev->hw_enc_features &= ~NETIF_F_GSO_UDP_TUNNEL; 3392 netdev->hw_features &= ~NETIF_F_GSO_UDP_TUNNEL; 3393 } 3394 if (!(adapter->dev_caps[0] & (1UL << VMXNET3_CAP_GENEVE_OUTER_CHECKSUM_OFFLOAD)) && 3395 !(adapter->dev_caps[0] & (1UL << VMXNET3_CAP_VXLAN_OUTER_CHECKSUM_OFFLOAD))) { 3396 netdev->hw_enc_features &= ~NETIF_F_GSO_UDP_TUNNEL_CSUM; 3397 netdev->hw_features &= ~NETIF_F_GSO_UDP_TUNNEL_CSUM; 3398 } 3399 } 3400 3401 netdev->vlan_features = netdev->hw_features & 3402 ~(NETIF_F_HW_VLAN_CTAG_TX | 3403 NETIF_F_HW_VLAN_CTAG_RX); 3404 netdev->features = netdev->hw_features | NETIF_F_HW_VLAN_CTAG_FILTER; 3405 } 3406 3407 3408 static void 3409 vmxnet3_read_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac) 3410 { 3411 u32 tmp; 3412 3413 tmp = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_MACL); 3414 *(u32 *)mac = tmp; 3415 3416 tmp = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_MACH); 3417 mac[4] = tmp & 0xff; 3418 mac[5] = (tmp >> 8) & 0xff; 3419 } 3420 3421 #ifdef CONFIG_PCI_MSI 3422 3423 /* 3424 * Enable MSIx vectors. 3425 * Returns : 3426 * VMXNET3_LINUX_MIN_MSIX_VECT when only minimum number of vectors required 3427 * were enabled. 3428 * number of vectors which were enabled otherwise (this number is greater 3429 * than VMXNET3_LINUX_MIN_MSIX_VECT) 3430 */ 3431 3432 static int 3433 vmxnet3_acquire_msix_vectors(struct vmxnet3_adapter *adapter, int nvec) 3434 { 3435 int ret = pci_enable_msix_range(adapter->pdev, 3436 adapter->intr.msix_entries, nvec, nvec); 3437 3438 if (ret == -ENOSPC && nvec > VMXNET3_LINUX_MIN_MSIX_VECT) { 3439 dev_err(&adapter->netdev->dev, 3440 "Failed to enable %d MSI-X, trying %d\n", 3441 nvec, VMXNET3_LINUX_MIN_MSIX_VECT); 3442 3443 ret = pci_enable_msix_range(adapter->pdev, 3444 adapter->intr.msix_entries, 3445 VMXNET3_LINUX_MIN_MSIX_VECT, 3446 VMXNET3_LINUX_MIN_MSIX_VECT); 3447 } 3448 3449 if (ret < 0) { 3450 dev_err(&adapter->netdev->dev, 3451 "Failed to enable MSI-X, error: %d\n", ret); 3452 } 3453 3454 return ret; 3455 } 3456 3457 3458 #endif /* CONFIG_PCI_MSI */ 3459 3460 static void 3461 vmxnet3_alloc_intr_resources(struct vmxnet3_adapter *adapter) 3462 { 3463 u32 cfg; 3464 unsigned long flags; 3465 3466 /* intr settings */ 3467 spin_lock_irqsave(&adapter->cmd_lock, flags); 3468 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 3469 VMXNET3_CMD_GET_CONF_INTR); 3470 cfg = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD); 3471 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 3472 adapter->intr.type = cfg & 0x3; 3473 adapter->intr.mask_mode = (cfg >> 2) & 0x3; 3474 3475 if (adapter->intr.type == VMXNET3_IT_AUTO) { 3476 adapter->intr.type = VMXNET3_IT_MSIX; 3477 } 3478 3479 #ifdef CONFIG_PCI_MSI 3480 if (adapter->intr.type == VMXNET3_IT_MSIX) { 3481 int i, nvec, nvec_allocated; 3482 3483 nvec = adapter->share_intr == VMXNET3_INTR_TXSHARE ? 3484 1 : adapter->num_tx_queues; 3485 nvec += adapter->share_intr == VMXNET3_INTR_BUDDYSHARE ? 3486 0 : adapter->num_rx_queues; 3487 nvec += 1; /* for link event */ 3488 nvec = nvec > VMXNET3_LINUX_MIN_MSIX_VECT ? 3489 nvec : VMXNET3_LINUX_MIN_MSIX_VECT; 3490 3491 for (i = 0; i < nvec; i++) 3492 adapter->intr.msix_entries[i].entry = i; 3493 3494 nvec_allocated = vmxnet3_acquire_msix_vectors(adapter, nvec); 3495 if (nvec_allocated < 0) 3496 goto msix_err; 3497 3498 /* If we cannot allocate one MSIx vector per queue 3499 * then limit the number of rx queues to 1 3500 */ 3501 if (nvec_allocated == VMXNET3_LINUX_MIN_MSIX_VECT && 3502 nvec != VMXNET3_LINUX_MIN_MSIX_VECT) { 3503 if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE 3504 || adapter->num_rx_queues != 1) { 3505 adapter->share_intr = VMXNET3_INTR_TXSHARE; 3506 netdev_err(adapter->netdev, 3507 "Number of rx queues : 1\n"); 3508 adapter->num_rx_queues = 1; 3509 } 3510 } 3511 3512 adapter->intr.num_intrs = nvec_allocated; 3513 return; 3514 3515 msix_err: 3516 /* If we cannot allocate MSIx vectors use only one rx queue */ 3517 dev_info(&adapter->pdev->dev, 3518 "Failed to enable MSI-X, error %d. " 3519 "Limiting #rx queues to 1, try MSI.\n", nvec_allocated); 3520 3521 adapter->intr.type = VMXNET3_IT_MSI; 3522 } 3523 3524 if (adapter->intr.type == VMXNET3_IT_MSI) { 3525 if (!pci_enable_msi(adapter->pdev)) { 3526 adapter->num_rx_queues = 1; 3527 adapter->intr.num_intrs = 1; 3528 return; 3529 } 3530 } 3531 #endif /* CONFIG_PCI_MSI */ 3532 3533 adapter->num_rx_queues = 1; 3534 dev_info(&adapter->netdev->dev, 3535 "Using INTx interrupt, #Rx queues: 1.\n"); 3536 adapter->intr.type = VMXNET3_IT_INTX; 3537 3538 /* INT-X related setting */ 3539 adapter->intr.num_intrs = 1; 3540 } 3541 3542 3543 static void 3544 vmxnet3_free_intr_resources(struct vmxnet3_adapter *adapter) 3545 { 3546 if (adapter->intr.type == VMXNET3_IT_MSIX) 3547 pci_disable_msix(adapter->pdev); 3548 else if (adapter->intr.type == VMXNET3_IT_MSI) 3549 pci_disable_msi(adapter->pdev); 3550 else 3551 BUG_ON(adapter->intr.type != VMXNET3_IT_INTX); 3552 } 3553 3554 3555 static void 3556 vmxnet3_tx_timeout(struct net_device *netdev, unsigned int txqueue) 3557 { 3558 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 3559 adapter->tx_timeout_count++; 3560 3561 netdev_err(adapter->netdev, "tx hang\n"); 3562 schedule_work(&adapter->work); 3563 } 3564 3565 3566 static void 3567 vmxnet3_reset_work(struct work_struct *data) 3568 { 3569 struct vmxnet3_adapter *adapter; 3570 3571 adapter = container_of(data, struct vmxnet3_adapter, work); 3572 3573 /* if another thread is resetting the device, no need to proceed */ 3574 if (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state)) 3575 return; 3576 3577 /* if the device is closed, we must leave it alone */ 3578 rtnl_lock(); 3579 if (netif_running(adapter->netdev)) { 3580 netdev_notice(adapter->netdev, "resetting\n"); 3581 vmxnet3_quiesce_dev(adapter); 3582 vmxnet3_reset_dev(adapter); 3583 vmxnet3_activate_dev(adapter); 3584 } else { 3585 netdev_info(adapter->netdev, "already closed\n"); 3586 } 3587 rtnl_unlock(); 3588 3589 netif_wake_queue(adapter->netdev); 3590 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state); 3591 } 3592 3593 3594 static int 3595 vmxnet3_probe_device(struct pci_dev *pdev, 3596 const struct pci_device_id *id) 3597 { 3598 static const struct net_device_ops vmxnet3_netdev_ops = { 3599 .ndo_open = vmxnet3_open, 3600 .ndo_stop = vmxnet3_close, 3601 .ndo_start_xmit = vmxnet3_xmit_frame, 3602 .ndo_set_mac_address = vmxnet3_set_mac_addr, 3603 .ndo_change_mtu = vmxnet3_change_mtu, 3604 .ndo_fix_features = vmxnet3_fix_features, 3605 .ndo_set_features = vmxnet3_set_features, 3606 .ndo_features_check = vmxnet3_features_check, 3607 .ndo_get_stats64 = vmxnet3_get_stats64, 3608 .ndo_tx_timeout = vmxnet3_tx_timeout, 3609 .ndo_set_rx_mode = vmxnet3_set_mc, 3610 .ndo_vlan_rx_add_vid = vmxnet3_vlan_rx_add_vid, 3611 .ndo_vlan_rx_kill_vid = vmxnet3_vlan_rx_kill_vid, 3612 #ifdef CONFIG_NET_POLL_CONTROLLER 3613 .ndo_poll_controller = vmxnet3_netpoll, 3614 #endif 3615 }; 3616 int err; 3617 u32 ver; 3618 struct net_device *netdev; 3619 struct vmxnet3_adapter *adapter; 3620 u8 mac[ETH_ALEN]; 3621 int size; 3622 int num_tx_queues; 3623 int num_rx_queues; 3624 int queues; 3625 unsigned long flags; 3626 3627 if (!pci_msi_enabled()) 3628 enable_mq = 0; 3629 3630 #ifdef VMXNET3_RSS 3631 if (enable_mq) 3632 num_rx_queues = min(VMXNET3_DEVICE_MAX_RX_QUEUES, 3633 (int)num_online_cpus()); 3634 else 3635 #endif 3636 num_rx_queues = 1; 3637 3638 if (enable_mq) 3639 num_tx_queues = min(VMXNET3_DEVICE_MAX_TX_QUEUES, 3640 (int)num_online_cpus()); 3641 else 3642 num_tx_queues = 1; 3643 3644 netdev = alloc_etherdev_mq(sizeof(struct vmxnet3_adapter), 3645 max(num_tx_queues, num_rx_queues)); 3646 if (!netdev) 3647 return -ENOMEM; 3648 3649 pci_set_drvdata(pdev, netdev); 3650 adapter = netdev_priv(netdev); 3651 adapter->netdev = netdev; 3652 adapter->pdev = pdev; 3653 3654 adapter->tx_ring_size = VMXNET3_DEF_TX_RING_SIZE; 3655 adapter->rx_ring_size = VMXNET3_DEF_RX_RING_SIZE; 3656 adapter->rx_ring2_size = VMXNET3_DEF_RX_RING2_SIZE; 3657 3658 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); 3659 if (err) { 3660 dev_err(&pdev->dev, "dma_set_mask failed\n"); 3661 goto err_set_mask; 3662 } 3663 3664 spin_lock_init(&adapter->cmd_lock); 3665 adapter->adapter_pa = dma_map_single(&adapter->pdev->dev, adapter, 3666 sizeof(struct vmxnet3_adapter), 3667 DMA_TO_DEVICE); 3668 if (dma_mapping_error(&adapter->pdev->dev, adapter->adapter_pa)) { 3669 dev_err(&pdev->dev, "Failed to map dma\n"); 3670 err = -EFAULT; 3671 goto err_set_mask; 3672 } 3673 adapter->shared = dma_alloc_coherent( 3674 &adapter->pdev->dev, 3675 sizeof(struct Vmxnet3_DriverShared), 3676 &adapter->shared_pa, GFP_KERNEL); 3677 if (!adapter->shared) { 3678 dev_err(&pdev->dev, "Failed to allocate memory\n"); 3679 err = -ENOMEM; 3680 goto err_alloc_shared; 3681 } 3682 3683 err = vmxnet3_alloc_pci_resources(adapter); 3684 if (err < 0) 3685 goto err_alloc_pci; 3686 3687 ver = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_VRRS); 3688 if (ver & (1 << VMXNET3_REV_7)) { 3689 VMXNET3_WRITE_BAR1_REG(adapter, 3690 VMXNET3_REG_VRRS, 3691 1 << VMXNET3_REV_7); 3692 adapter->version = VMXNET3_REV_7 + 1; 3693 } else if (ver & (1 << VMXNET3_REV_6)) { 3694 VMXNET3_WRITE_BAR1_REG(adapter, 3695 VMXNET3_REG_VRRS, 3696 1 << VMXNET3_REV_6); 3697 adapter->version = VMXNET3_REV_6 + 1; 3698 } else if (ver & (1 << VMXNET3_REV_5)) { 3699 VMXNET3_WRITE_BAR1_REG(adapter, 3700 VMXNET3_REG_VRRS, 3701 1 << VMXNET3_REV_5); 3702 adapter->version = VMXNET3_REV_5 + 1; 3703 } else if (ver & (1 << VMXNET3_REV_4)) { 3704 VMXNET3_WRITE_BAR1_REG(adapter, 3705 VMXNET3_REG_VRRS, 3706 1 << VMXNET3_REV_4); 3707 adapter->version = VMXNET3_REV_4 + 1; 3708 } else if (ver & (1 << VMXNET3_REV_3)) { 3709 VMXNET3_WRITE_BAR1_REG(adapter, 3710 VMXNET3_REG_VRRS, 3711 1 << VMXNET3_REV_3); 3712 adapter->version = VMXNET3_REV_3 + 1; 3713 } else if (ver & (1 << VMXNET3_REV_2)) { 3714 VMXNET3_WRITE_BAR1_REG(adapter, 3715 VMXNET3_REG_VRRS, 3716 1 << VMXNET3_REV_2); 3717 adapter->version = VMXNET3_REV_2 + 1; 3718 } else if (ver & (1 << VMXNET3_REV_1)) { 3719 VMXNET3_WRITE_BAR1_REG(adapter, 3720 VMXNET3_REG_VRRS, 3721 1 << VMXNET3_REV_1); 3722 adapter->version = VMXNET3_REV_1 + 1; 3723 } else { 3724 dev_err(&pdev->dev, 3725 "Incompatible h/w version (0x%x) for adapter\n", ver); 3726 err = -EBUSY; 3727 goto err_ver; 3728 } 3729 dev_dbg(&pdev->dev, "Using device version %d\n", adapter->version); 3730 3731 ver = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_UVRS); 3732 if (ver & 1) { 3733 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_UVRS, 1); 3734 } else { 3735 dev_err(&pdev->dev, 3736 "Incompatible upt version (0x%x) for adapter\n", ver); 3737 err = -EBUSY; 3738 goto err_ver; 3739 } 3740 3741 if (VMXNET3_VERSION_GE_7(adapter)) { 3742 adapter->devcap_supported[0] = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_DCR); 3743 adapter->ptcap_supported[0] = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_PTCR); 3744 if (adapter->devcap_supported[0] & (1UL << VMXNET3_CAP_LARGE_BAR)) { 3745 adapter->dev_caps[0] = adapter->devcap_supported[0] & 3746 (1UL << VMXNET3_CAP_LARGE_BAR); 3747 } 3748 if (!(adapter->ptcap_supported[0] & (1UL << VMXNET3_DCR_ERROR)) && 3749 adapter->ptcap_supported[0] & (1UL << VMXNET3_CAP_OOORX_COMP) && 3750 adapter->devcap_supported[0] & (1UL << VMXNET3_CAP_OOORX_COMP)) { 3751 adapter->dev_caps[0] |= adapter->devcap_supported[0] & 3752 (1UL << VMXNET3_CAP_OOORX_COMP); 3753 } 3754 if (adapter->dev_caps[0]) 3755 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DCR, adapter->dev_caps[0]); 3756 3757 spin_lock_irqsave(&adapter->cmd_lock, flags); 3758 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_GET_DCR0_REG); 3759 adapter->dev_caps[0] = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD); 3760 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 3761 } 3762 3763 if (VMXNET3_VERSION_GE_7(adapter) && 3764 adapter->dev_caps[0] & (1UL << VMXNET3_CAP_LARGE_BAR)) { 3765 adapter->tx_prod_offset = VMXNET3_REG_LB_TXPROD; 3766 adapter->rx_prod_offset = VMXNET3_REG_LB_RXPROD; 3767 adapter->rx_prod2_offset = VMXNET3_REG_LB_RXPROD2; 3768 } else { 3769 adapter->tx_prod_offset = VMXNET3_REG_TXPROD; 3770 adapter->rx_prod_offset = VMXNET3_REG_RXPROD; 3771 adapter->rx_prod2_offset = VMXNET3_REG_RXPROD2; 3772 } 3773 3774 if (VMXNET3_VERSION_GE_6(adapter)) { 3775 spin_lock_irqsave(&adapter->cmd_lock, flags); 3776 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 3777 VMXNET3_CMD_GET_MAX_QUEUES_CONF); 3778 queues = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD); 3779 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 3780 if (queues > 0) { 3781 adapter->num_rx_queues = min(num_rx_queues, ((queues >> 8) & 0xff)); 3782 adapter->num_tx_queues = min(num_tx_queues, (queues & 0xff)); 3783 } else { 3784 adapter->num_rx_queues = min(num_rx_queues, 3785 VMXNET3_DEVICE_DEFAULT_RX_QUEUES); 3786 adapter->num_tx_queues = min(num_tx_queues, 3787 VMXNET3_DEVICE_DEFAULT_TX_QUEUES); 3788 } 3789 if (adapter->num_rx_queues > VMXNET3_MAX_RX_QUEUES || 3790 adapter->num_tx_queues > VMXNET3_MAX_TX_QUEUES) { 3791 adapter->queuesExtEnabled = true; 3792 } else { 3793 adapter->queuesExtEnabled = false; 3794 } 3795 } else { 3796 adapter->queuesExtEnabled = false; 3797 num_rx_queues = rounddown_pow_of_two(num_rx_queues); 3798 num_tx_queues = rounddown_pow_of_two(num_tx_queues); 3799 adapter->num_rx_queues = min(num_rx_queues, 3800 VMXNET3_DEVICE_DEFAULT_RX_QUEUES); 3801 adapter->num_tx_queues = min(num_tx_queues, 3802 VMXNET3_DEVICE_DEFAULT_TX_QUEUES); 3803 } 3804 dev_info(&pdev->dev, 3805 "# of Tx queues : %d, # of Rx queues : %d\n", 3806 adapter->num_tx_queues, adapter->num_rx_queues); 3807 3808 adapter->rx_buf_per_pkt = 1; 3809 3810 size = sizeof(struct Vmxnet3_TxQueueDesc) * adapter->num_tx_queues; 3811 size += sizeof(struct Vmxnet3_RxQueueDesc) * adapter->num_rx_queues; 3812 adapter->tqd_start = dma_alloc_coherent(&adapter->pdev->dev, size, 3813 &adapter->queue_desc_pa, 3814 GFP_KERNEL); 3815 3816 if (!adapter->tqd_start) { 3817 dev_err(&pdev->dev, "Failed to allocate memory\n"); 3818 err = -ENOMEM; 3819 goto err_ver; 3820 } 3821 adapter->rqd_start = (struct Vmxnet3_RxQueueDesc *)(adapter->tqd_start + 3822 adapter->num_tx_queues); 3823 3824 adapter->pm_conf = dma_alloc_coherent(&adapter->pdev->dev, 3825 sizeof(struct Vmxnet3_PMConf), 3826 &adapter->pm_conf_pa, 3827 GFP_KERNEL); 3828 if (adapter->pm_conf == NULL) { 3829 err = -ENOMEM; 3830 goto err_alloc_pm; 3831 } 3832 3833 #ifdef VMXNET3_RSS 3834 3835 adapter->rss_conf = dma_alloc_coherent(&adapter->pdev->dev, 3836 sizeof(struct UPT1_RSSConf), 3837 &adapter->rss_conf_pa, 3838 GFP_KERNEL); 3839 if (adapter->rss_conf == NULL) { 3840 err = -ENOMEM; 3841 goto err_alloc_rss; 3842 } 3843 #endif /* VMXNET3_RSS */ 3844 3845 if (VMXNET3_VERSION_GE_3(adapter)) { 3846 adapter->coal_conf = 3847 dma_alloc_coherent(&adapter->pdev->dev, 3848 sizeof(struct Vmxnet3_CoalesceScheme) 3849 , 3850 &adapter->coal_conf_pa, 3851 GFP_KERNEL); 3852 if (!adapter->coal_conf) { 3853 err = -ENOMEM; 3854 goto err_coal_conf; 3855 } 3856 adapter->coal_conf->coalMode = VMXNET3_COALESCE_DISABLED; 3857 adapter->default_coal_mode = true; 3858 } 3859 3860 if (VMXNET3_VERSION_GE_4(adapter)) { 3861 adapter->default_rss_fields = true; 3862 adapter->rss_fields = VMXNET3_RSS_FIELDS_DEFAULT; 3863 } 3864 3865 SET_NETDEV_DEV(netdev, &pdev->dev); 3866 vmxnet3_declare_features(adapter); 3867 3868 adapter->rxdata_desc_size = VMXNET3_VERSION_GE_3(adapter) ? 3869 VMXNET3_DEF_RXDATA_DESC_SIZE : 0; 3870 3871 if (adapter->num_tx_queues == adapter->num_rx_queues) 3872 adapter->share_intr = VMXNET3_INTR_BUDDYSHARE; 3873 else 3874 adapter->share_intr = VMXNET3_INTR_DONTSHARE; 3875 3876 vmxnet3_alloc_intr_resources(adapter); 3877 3878 #ifdef VMXNET3_RSS 3879 if (adapter->num_rx_queues > 1 && 3880 adapter->intr.type == VMXNET3_IT_MSIX) { 3881 adapter->rss = true; 3882 netdev->hw_features |= NETIF_F_RXHASH; 3883 netdev->features |= NETIF_F_RXHASH; 3884 dev_dbg(&pdev->dev, "RSS is enabled.\n"); 3885 } else { 3886 adapter->rss = false; 3887 } 3888 #endif 3889 3890 vmxnet3_read_mac_addr(adapter, mac); 3891 dev_addr_set(netdev, mac); 3892 3893 netdev->netdev_ops = &vmxnet3_netdev_ops; 3894 vmxnet3_set_ethtool_ops(netdev); 3895 netdev->watchdog_timeo = 5 * HZ; 3896 3897 /* MTU range: 60 - 9190 */ 3898 netdev->min_mtu = VMXNET3_MIN_MTU; 3899 if (VMXNET3_VERSION_GE_6(adapter)) 3900 netdev->max_mtu = VMXNET3_V6_MAX_MTU; 3901 else 3902 netdev->max_mtu = VMXNET3_MAX_MTU; 3903 3904 INIT_WORK(&adapter->work, vmxnet3_reset_work); 3905 set_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state); 3906 3907 if (adapter->intr.type == VMXNET3_IT_MSIX) { 3908 int i; 3909 for (i = 0; i < adapter->num_rx_queues; i++) { 3910 netif_napi_add(adapter->netdev, 3911 &adapter->rx_queue[i].napi, 3912 vmxnet3_poll_rx_only); 3913 } 3914 } else { 3915 netif_napi_add(adapter->netdev, &adapter->rx_queue[0].napi, 3916 vmxnet3_poll); 3917 } 3918 3919 netif_set_real_num_tx_queues(adapter->netdev, adapter->num_tx_queues); 3920 netif_set_real_num_rx_queues(adapter->netdev, adapter->num_rx_queues); 3921 3922 netif_carrier_off(netdev); 3923 err = register_netdev(netdev); 3924 3925 if (err) { 3926 dev_err(&pdev->dev, "Failed to register adapter\n"); 3927 goto err_register; 3928 } 3929 3930 vmxnet3_check_link(adapter, false); 3931 return 0; 3932 3933 err_register: 3934 if (VMXNET3_VERSION_GE_3(adapter)) { 3935 dma_free_coherent(&adapter->pdev->dev, 3936 sizeof(struct Vmxnet3_CoalesceScheme), 3937 adapter->coal_conf, adapter->coal_conf_pa); 3938 } 3939 vmxnet3_free_intr_resources(adapter); 3940 err_coal_conf: 3941 #ifdef VMXNET3_RSS 3942 dma_free_coherent(&adapter->pdev->dev, sizeof(struct UPT1_RSSConf), 3943 adapter->rss_conf, adapter->rss_conf_pa); 3944 err_alloc_rss: 3945 #endif 3946 dma_free_coherent(&adapter->pdev->dev, sizeof(struct Vmxnet3_PMConf), 3947 adapter->pm_conf, adapter->pm_conf_pa); 3948 err_alloc_pm: 3949 dma_free_coherent(&adapter->pdev->dev, size, adapter->tqd_start, 3950 adapter->queue_desc_pa); 3951 err_ver: 3952 vmxnet3_free_pci_resources(adapter); 3953 err_alloc_pci: 3954 dma_free_coherent(&adapter->pdev->dev, 3955 sizeof(struct Vmxnet3_DriverShared), 3956 adapter->shared, adapter->shared_pa); 3957 err_alloc_shared: 3958 dma_unmap_single(&adapter->pdev->dev, adapter->adapter_pa, 3959 sizeof(struct vmxnet3_adapter), DMA_TO_DEVICE); 3960 err_set_mask: 3961 free_netdev(netdev); 3962 return err; 3963 } 3964 3965 3966 static void 3967 vmxnet3_remove_device(struct pci_dev *pdev) 3968 { 3969 struct net_device *netdev = pci_get_drvdata(pdev); 3970 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 3971 int size = 0; 3972 int num_rx_queues, rx_queues; 3973 unsigned long flags; 3974 3975 #ifdef VMXNET3_RSS 3976 if (enable_mq) 3977 num_rx_queues = min(VMXNET3_DEVICE_MAX_RX_QUEUES, 3978 (int)num_online_cpus()); 3979 else 3980 #endif 3981 num_rx_queues = 1; 3982 if (!VMXNET3_VERSION_GE_6(adapter)) { 3983 num_rx_queues = rounddown_pow_of_two(num_rx_queues); 3984 } 3985 if (VMXNET3_VERSION_GE_6(adapter)) { 3986 spin_lock_irqsave(&adapter->cmd_lock, flags); 3987 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 3988 VMXNET3_CMD_GET_MAX_QUEUES_CONF); 3989 rx_queues = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD); 3990 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 3991 if (rx_queues > 0) 3992 rx_queues = (rx_queues >> 8) & 0xff; 3993 else 3994 rx_queues = min(num_rx_queues, VMXNET3_DEVICE_DEFAULT_RX_QUEUES); 3995 num_rx_queues = min(num_rx_queues, rx_queues); 3996 } else { 3997 num_rx_queues = min(num_rx_queues, 3998 VMXNET3_DEVICE_DEFAULT_RX_QUEUES); 3999 } 4000 4001 cancel_work_sync(&adapter->work); 4002 4003 unregister_netdev(netdev); 4004 4005 vmxnet3_free_intr_resources(adapter); 4006 vmxnet3_free_pci_resources(adapter); 4007 if (VMXNET3_VERSION_GE_3(adapter)) { 4008 dma_free_coherent(&adapter->pdev->dev, 4009 sizeof(struct Vmxnet3_CoalesceScheme), 4010 adapter->coal_conf, adapter->coal_conf_pa); 4011 } 4012 #ifdef VMXNET3_RSS 4013 dma_free_coherent(&adapter->pdev->dev, sizeof(struct UPT1_RSSConf), 4014 adapter->rss_conf, adapter->rss_conf_pa); 4015 #endif 4016 dma_free_coherent(&adapter->pdev->dev, sizeof(struct Vmxnet3_PMConf), 4017 adapter->pm_conf, adapter->pm_conf_pa); 4018 4019 size = sizeof(struct Vmxnet3_TxQueueDesc) * adapter->num_tx_queues; 4020 size += sizeof(struct Vmxnet3_RxQueueDesc) * num_rx_queues; 4021 dma_free_coherent(&adapter->pdev->dev, size, adapter->tqd_start, 4022 adapter->queue_desc_pa); 4023 dma_free_coherent(&adapter->pdev->dev, 4024 sizeof(struct Vmxnet3_DriverShared), 4025 adapter->shared, adapter->shared_pa); 4026 dma_unmap_single(&adapter->pdev->dev, adapter->adapter_pa, 4027 sizeof(struct vmxnet3_adapter), DMA_TO_DEVICE); 4028 free_netdev(netdev); 4029 } 4030 4031 static void vmxnet3_shutdown_device(struct pci_dev *pdev) 4032 { 4033 struct net_device *netdev = pci_get_drvdata(pdev); 4034 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 4035 unsigned long flags; 4036 4037 /* Reset_work may be in the middle of resetting the device, wait for its 4038 * completion. 4039 */ 4040 while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state)) 4041 usleep_range(1000, 2000); 4042 4043 if (test_and_set_bit(VMXNET3_STATE_BIT_QUIESCED, 4044 &adapter->state)) { 4045 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state); 4046 return; 4047 } 4048 spin_lock_irqsave(&adapter->cmd_lock, flags); 4049 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 4050 VMXNET3_CMD_QUIESCE_DEV); 4051 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 4052 vmxnet3_disable_all_intrs(adapter); 4053 4054 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state); 4055 } 4056 4057 4058 #ifdef CONFIG_PM 4059 4060 static int 4061 vmxnet3_suspend(struct device *device) 4062 { 4063 struct pci_dev *pdev = to_pci_dev(device); 4064 struct net_device *netdev = pci_get_drvdata(pdev); 4065 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 4066 struct Vmxnet3_PMConf *pmConf; 4067 struct ethhdr *ehdr; 4068 struct arphdr *ahdr; 4069 u8 *arpreq; 4070 struct in_device *in_dev; 4071 struct in_ifaddr *ifa; 4072 unsigned long flags; 4073 int i = 0; 4074 4075 if (!netif_running(netdev)) 4076 return 0; 4077 4078 for (i = 0; i < adapter->num_rx_queues; i++) 4079 napi_disable(&adapter->rx_queue[i].napi); 4080 4081 vmxnet3_disable_all_intrs(adapter); 4082 vmxnet3_free_irqs(adapter); 4083 vmxnet3_free_intr_resources(adapter); 4084 4085 netif_device_detach(netdev); 4086 4087 /* Create wake-up filters. */ 4088 pmConf = adapter->pm_conf; 4089 memset(pmConf, 0, sizeof(*pmConf)); 4090 4091 if (adapter->wol & WAKE_UCAST) { 4092 pmConf->filters[i].patternSize = ETH_ALEN; 4093 pmConf->filters[i].maskSize = 1; 4094 memcpy(pmConf->filters[i].pattern, netdev->dev_addr, ETH_ALEN); 4095 pmConf->filters[i].mask[0] = 0x3F; /* LSB ETH_ALEN bits */ 4096 4097 pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_FILTER; 4098 i++; 4099 } 4100 4101 if (adapter->wol & WAKE_ARP) { 4102 rcu_read_lock(); 4103 4104 in_dev = __in_dev_get_rcu(netdev); 4105 if (!in_dev) { 4106 rcu_read_unlock(); 4107 goto skip_arp; 4108 } 4109 4110 ifa = rcu_dereference(in_dev->ifa_list); 4111 if (!ifa) { 4112 rcu_read_unlock(); 4113 goto skip_arp; 4114 } 4115 4116 pmConf->filters[i].patternSize = ETH_HLEN + /* Ethernet header*/ 4117 sizeof(struct arphdr) + /* ARP header */ 4118 2 * ETH_ALEN + /* 2 Ethernet addresses*/ 4119 2 * sizeof(u32); /*2 IPv4 addresses */ 4120 pmConf->filters[i].maskSize = 4121 (pmConf->filters[i].patternSize - 1) / 8 + 1; 4122 4123 /* ETH_P_ARP in Ethernet header. */ 4124 ehdr = (struct ethhdr *)pmConf->filters[i].pattern; 4125 ehdr->h_proto = htons(ETH_P_ARP); 4126 4127 /* ARPOP_REQUEST in ARP header. */ 4128 ahdr = (struct arphdr *)&pmConf->filters[i].pattern[ETH_HLEN]; 4129 ahdr->ar_op = htons(ARPOP_REQUEST); 4130 arpreq = (u8 *)(ahdr + 1); 4131 4132 /* The Unicast IPv4 address in 'tip' field. */ 4133 arpreq += 2 * ETH_ALEN + sizeof(u32); 4134 *(__be32 *)arpreq = ifa->ifa_address; 4135 4136 rcu_read_unlock(); 4137 4138 /* The mask for the relevant bits. */ 4139 pmConf->filters[i].mask[0] = 0x00; 4140 pmConf->filters[i].mask[1] = 0x30; /* ETH_P_ARP */ 4141 pmConf->filters[i].mask[2] = 0x30; /* ARPOP_REQUEST */ 4142 pmConf->filters[i].mask[3] = 0x00; 4143 pmConf->filters[i].mask[4] = 0xC0; /* IPv4 TIP */ 4144 pmConf->filters[i].mask[5] = 0x03; /* IPv4 TIP */ 4145 4146 pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_FILTER; 4147 i++; 4148 } 4149 4150 skip_arp: 4151 if (adapter->wol & WAKE_MAGIC) 4152 pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_MAGIC; 4153 4154 pmConf->numFilters = i; 4155 4156 adapter->shared->devRead.pmConfDesc.confVer = cpu_to_le32(1); 4157 adapter->shared->devRead.pmConfDesc.confLen = cpu_to_le32(sizeof( 4158 *pmConf)); 4159 adapter->shared->devRead.pmConfDesc.confPA = 4160 cpu_to_le64(adapter->pm_conf_pa); 4161 4162 spin_lock_irqsave(&adapter->cmd_lock, flags); 4163 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 4164 VMXNET3_CMD_UPDATE_PMCFG); 4165 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 4166 4167 pci_save_state(pdev); 4168 pci_enable_wake(pdev, pci_choose_state(pdev, PMSG_SUSPEND), 4169 adapter->wol); 4170 pci_disable_device(pdev); 4171 pci_set_power_state(pdev, pci_choose_state(pdev, PMSG_SUSPEND)); 4172 4173 return 0; 4174 } 4175 4176 4177 static int 4178 vmxnet3_resume(struct device *device) 4179 { 4180 int err; 4181 unsigned long flags; 4182 struct pci_dev *pdev = to_pci_dev(device); 4183 struct net_device *netdev = pci_get_drvdata(pdev); 4184 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 4185 4186 if (!netif_running(netdev)) 4187 return 0; 4188 4189 pci_set_power_state(pdev, PCI_D0); 4190 pci_restore_state(pdev); 4191 err = pci_enable_device_mem(pdev); 4192 if (err != 0) 4193 return err; 4194 4195 pci_enable_wake(pdev, PCI_D0, 0); 4196 4197 vmxnet3_alloc_intr_resources(adapter); 4198 4199 /* During hibernate and suspend, device has to be reinitialized as the 4200 * device state need not be preserved. 4201 */ 4202 4203 /* Need not check adapter state as other reset tasks cannot run during 4204 * device resume. 4205 */ 4206 spin_lock_irqsave(&adapter->cmd_lock, flags); 4207 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 4208 VMXNET3_CMD_QUIESCE_DEV); 4209 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 4210 vmxnet3_tq_cleanup_all(adapter); 4211 vmxnet3_rq_cleanup_all(adapter); 4212 4213 vmxnet3_reset_dev(adapter); 4214 err = vmxnet3_activate_dev(adapter); 4215 if (err != 0) { 4216 netdev_err(netdev, 4217 "failed to re-activate on resume, error: %d", err); 4218 vmxnet3_force_close(adapter); 4219 return err; 4220 } 4221 netif_device_attach(netdev); 4222 4223 return 0; 4224 } 4225 4226 static const struct dev_pm_ops vmxnet3_pm_ops = { 4227 .suspend = vmxnet3_suspend, 4228 .resume = vmxnet3_resume, 4229 .freeze = vmxnet3_suspend, 4230 .restore = vmxnet3_resume, 4231 }; 4232 #endif 4233 4234 static struct pci_driver vmxnet3_driver = { 4235 .name = vmxnet3_driver_name, 4236 .id_table = vmxnet3_pciid_table, 4237 .probe = vmxnet3_probe_device, 4238 .remove = vmxnet3_remove_device, 4239 .shutdown = vmxnet3_shutdown_device, 4240 #ifdef CONFIG_PM 4241 .driver.pm = &vmxnet3_pm_ops, 4242 #endif 4243 }; 4244 4245 4246 static int __init 4247 vmxnet3_init_module(void) 4248 { 4249 pr_info("%s - version %s\n", VMXNET3_DRIVER_DESC, 4250 VMXNET3_DRIVER_VERSION_REPORT); 4251 return pci_register_driver(&vmxnet3_driver); 4252 } 4253 4254 module_init(vmxnet3_init_module); 4255 4256 4257 static void 4258 vmxnet3_exit_module(void) 4259 { 4260 pci_unregister_driver(&vmxnet3_driver); 4261 } 4262 4263 module_exit(vmxnet3_exit_module); 4264 4265 MODULE_AUTHOR("VMware, Inc."); 4266 MODULE_DESCRIPTION(VMXNET3_DRIVER_DESC); 4267 MODULE_LICENSE("GPL v2"); 4268 MODULE_VERSION(VMXNET3_DRIVER_VERSION_STRING); 4269