1 /* 2 * Linux driver for VMware's vmxnet3 ethernet NIC. 3 * 4 * Copyright (C) 2008-2016, 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, 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 adapter->shared->devRead.intrConf.intrCtrl &= 79 cpu_to_le32(~VMXNET3_IC_DISABLE_ALL); 80 } 81 82 83 static void 84 vmxnet3_disable_all_intrs(struct vmxnet3_adapter *adapter) 85 { 86 int i; 87 88 adapter->shared->devRead.intrConf.intrCtrl |= 89 cpu_to_le32(VMXNET3_IC_DISABLE_ALL); 90 for (i = 0; i < adapter->intr.num_intrs; i++) 91 vmxnet3_disable_intr(adapter, i); 92 } 93 94 95 static void 96 vmxnet3_ack_events(struct vmxnet3_adapter *adapter, u32 events) 97 { 98 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_ECR, events); 99 } 100 101 102 static bool 103 vmxnet3_tq_stopped(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter) 104 { 105 return tq->stopped; 106 } 107 108 109 static void 110 vmxnet3_tq_start(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter) 111 { 112 tq->stopped = false; 113 netif_start_subqueue(adapter->netdev, tq - adapter->tx_queue); 114 } 115 116 117 static void 118 vmxnet3_tq_wake(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter) 119 { 120 tq->stopped = false; 121 netif_wake_subqueue(adapter->netdev, (tq - adapter->tx_queue)); 122 } 123 124 125 static void 126 vmxnet3_tq_stop(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter) 127 { 128 tq->stopped = true; 129 tq->num_stop++; 130 netif_stop_subqueue(adapter->netdev, (tq - adapter->tx_queue)); 131 } 132 133 134 /* 135 * Check the link state. This may start or stop the tx queue. 136 */ 137 static void 138 vmxnet3_check_link(struct vmxnet3_adapter *adapter, bool affectTxQueue) 139 { 140 u32 ret; 141 int i; 142 unsigned long flags; 143 144 spin_lock_irqsave(&adapter->cmd_lock, flags); 145 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_GET_LINK); 146 ret = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD); 147 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 148 149 adapter->link_speed = ret >> 16; 150 if (ret & 1) { /* Link is up. */ 151 netdev_info(adapter->netdev, "NIC Link is Up %d Mbps\n", 152 adapter->link_speed); 153 netif_carrier_on(adapter->netdev); 154 155 if (affectTxQueue) { 156 for (i = 0; i < adapter->num_tx_queues; i++) 157 vmxnet3_tq_start(&adapter->tx_queue[i], 158 adapter); 159 } 160 } else { 161 netdev_info(adapter->netdev, "NIC Link is Down\n"); 162 netif_carrier_off(adapter->netdev); 163 164 if (affectTxQueue) { 165 for (i = 0; i < adapter->num_tx_queues; i++) 166 vmxnet3_tq_stop(&adapter->tx_queue[i], adapter); 167 } 168 } 169 } 170 171 static void 172 vmxnet3_process_events(struct vmxnet3_adapter *adapter) 173 { 174 int i; 175 unsigned long flags; 176 u32 events = le32_to_cpu(adapter->shared->ecr); 177 if (!events) 178 return; 179 180 vmxnet3_ack_events(adapter, events); 181 182 /* Check if link state has changed */ 183 if (events & VMXNET3_ECR_LINK) 184 vmxnet3_check_link(adapter, true); 185 186 /* Check if there is an error on xmit/recv queues */ 187 if (events & (VMXNET3_ECR_TQERR | VMXNET3_ECR_RQERR)) { 188 spin_lock_irqsave(&adapter->cmd_lock, flags); 189 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 190 VMXNET3_CMD_GET_QUEUE_STATUS); 191 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 192 193 for (i = 0; i < adapter->num_tx_queues; i++) 194 if (adapter->tqd_start[i].status.stopped) 195 dev_err(&adapter->netdev->dev, 196 "%s: tq[%d] error 0x%x\n", 197 adapter->netdev->name, i, le32_to_cpu( 198 adapter->tqd_start[i].status.error)); 199 for (i = 0; i < adapter->num_rx_queues; i++) 200 if (adapter->rqd_start[i].status.stopped) 201 dev_err(&adapter->netdev->dev, 202 "%s: rq[%d] error 0x%x\n", 203 adapter->netdev->name, i, 204 adapter->rqd_start[i].status.error); 205 206 schedule_work(&adapter->work); 207 } 208 } 209 210 #ifdef __BIG_ENDIAN_BITFIELD 211 /* 212 * The device expects the bitfields in shared structures to be written in 213 * little endian. When CPU is big endian, the following routines are used to 214 * correctly read and write into ABI. 215 * The general technique used here is : double word bitfields are defined in 216 * opposite order for big endian architecture. Then before reading them in 217 * driver the complete double word is translated using le32_to_cpu. Similarly 218 * After the driver writes into bitfields, cpu_to_le32 is used to translate the 219 * double words into required format. 220 * In order to avoid touching bits in shared structure more than once, temporary 221 * descriptors are used. These are passed as srcDesc to following functions. 222 */ 223 static void vmxnet3_RxDescToCPU(const struct Vmxnet3_RxDesc *srcDesc, 224 struct Vmxnet3_RxDesc *dstDesc) 225 { 226 u32 *src = (u32 *)srcDesc + 2; 227 u32 *dst = (u32 *)dstDesc + 2; 228 dstDesc->addr = le64_to_cpu(srcDesc->addr); 229 *dst = le32_to_cpu(*src); 230 dstDesc->ext1 = le32_to_cpu(srcDesc->ext1); 231 } 232 233 static void vmxnet3_TxDescToLe(const struct Vmxnet3_TxDesc *srcDesc, 234 struct Vmxnet3_TxDesc *dstDesc) 235 { 236 int i; 237 u32 *src = (u32 *)(srcDesc + 1); 238 u32 *dst = (u32 *)(dstDesc + 1); 239 240 /* Working backwards so that the gen bit is set at the end. */ 241 for (i = 2; i > 0; i--) { 242 src--; 243 dst--; 244 *dst = cpu_to_le32(*src); 245 } 246 } 247 248 249 static void vmxnet3_RxCompToCPU(const struct Vmxnet3_RxCompDesc *srcDesc, 250 struct Vmxnet3_RxCompDesc *dstDesc) 251 { 252 int i = 0; 253 u32 *src = (u32 *)srcDesc; 254 u32 *dst = (u32 *)dstDesc; 255 for (i = 0; i < sizeof(struct Vmxnet3_RxCompDesc) / sizeof(u32); i++) { 256 *dst = le32_to_cpu(*src); 257 src++; 258 dst++; 259 } 260 } 261 262 263 /* Used to read bitfield values from double words. */ 264 static u32 get_bitfield32(const __le32 *bitfield, u32 pos, u32 size) 265 { 266 u32 temp = le32_to_cpu(*bitfield); 267 u32 mask = ((1 << size) - 1) << pos; 268 temp &= mask; 269 temp >>= pos; 270 return temp; 271 } 272 273 274 275 #endif /* __BIG_ENDIAN_BITFIELD */ 276 277 #ifdef __BIG_ENDIAN_BITFIELD 278 279 # define VMXNET3_TXDESC_GET_GEN(txdesc) get_bitfield32(((const __le32 *) \ 280 txdesc) + VMXNET3_TXD_GEN_DWORD_SHIFT, \ 281 VMXNET3_TXD_GEN_SHIFT, VMXNET3_TXD_GEN_SIZE) 282 # define VMXNET3_TXDESC_GET_EOP(txdesc) get_bitfield32(((const __le32 *) \ 283 txdesc) + VMXNET3_TXD_EOP_DWORD_SHIFT, \ 284 VMXNET3_TXD_EOP_SHIFT, VMXNET3_TXD_EOP_SIZE) 285 # define VMXNET3_TCD_GET_GEN(tcd) get_bitfield32(((const __le32 *)tcd) + \ 286 VMXNET3_TCD_GEN_DWORD_SHIFT, VMXNET3_TCD_GEN_SHIFT, \ 287 VMXNET3_TCD_GEN_SIZE) 288 # define VMXNET3_TCD_GET_TXIDX(tcd) get_bitfield32((const __le32 *)tcd, \ 289 VMXNET3_TCD_TXIDX_SHIFT, VMXNET3_TCD_TXIDX_SIZE) 290 # define vmxnet3_getRxComp(dstrcd, rcd, tmp) do { \ 291 (dstrcd) = (tmp); \ 292 vmxnet3_RxCompToCPU((rcd), (tmp)); \ 293 } while (0) 294 # define vmxnet3_getRxDesc(dstrxd, rxd, tmp) do { \ 295 (dstrxd) = (tmp); \ 296 vmxnet3_RxDescToCPU((rxd), (tmp)); \ 297 } while (0) 298 299 #else 300 301 # define VMXNET3_TXDESC_GET_GEN(txdesc) ((txdesc)->gen) 302 # define VMXNET3_TXDESC_GET_EOP(txdesc) ((txdesc)->eop) 303 # define VMXNET3_TCD_GET_GEN(tcd) ((tcd)->gen) 304 # define VMXNET3_TCD_GET_TXIDX(tcd) ((tcd)->txdIdx) 305 # define vmxnet3_getRxComp(dstrcd, rcd, tmp) (dstrcd) = (rcd) 306 # define vmxnet3_getRxDesc(dstrxd, rxd, tmp) (dstrxd) = (rxd) 307 308 #endif /* __BIG_ENDIAN_BITFIELD */ 309 310 311 static void 312 vmxnet3_unmap_tx_buf(struct vmxnet3_tx_buf_info *tbi, 313 struct pci_dev *pdev) 314 { 315 if (tbi->map_type == VMXNET3_MAP_SINGLE) 316 dma_unmap_single(&pdev->dev, tbi->dma_addr, tbi->len, 317 PCI_DMA_TODEVICE); 318 else if (tbi->map_type == VMXNET3_MAP_PAGE) 319 dma_unmap_page(&pdev->dev, tbi->dma_addr, tbi->len, 320 PCI_DMA_TODEVICE); 321 else 322 BUG_ON(tbi->map_type != VMXNET3_MAP_NONE); 323 324 tbi->map_type = VMXNET3_MAP_NONE; /* to help debugging */ 325 } 326 327 328 static int 329 vmxnet3_unmap_pkt(u32 eop_idx, struct vmxnet3_tx_queue *tq, 330 struct pci_dev *pdev, struct vmxnet3_adapter *adapter) 331 { 332 struct sk_buff *skb; 333 int entries = 0; 334 335 /* no out of order completion */ 336 BUG_ON(tq->buf_info[eop_idx].sop_idx != tq->tx_ring.next2comp); 337 BUG_ON(VMXNET3_TXDESC_GET_EOP(&(tq->tx_ring.base[eop_idx].txd)) != 1); 338 339 skb = tq->buf_info[eop_idx].skb; 340 BUG_ON(skb == NULL); 341 tq->buf_info[eop_idx].skb = NULL; 342 343 VMXNET3_INC_RING_IDX_ONLY(eop_idx, tq->tx_ring.size); 344 345 while (tq->tx_ring.next2comp != eop_idx) { 346 vmxnet3_unmap_tx_buf(tq->buf_info + tq->tx_ring.next2comp, 347 pdev); 348 349 /* update next2comp w/o tx_lock. Since we are marking more, 350 * instead of less, tx ring entries avail, the worst case is 351 * that the tx routine incorrectly re-queues a pkt due to 352 * insufficient tx ring entries. 353 */ 354 vmxnet3_cmd_ring_adv_next2comp(&tq->tx_ring); 355 entries++; 356 } 357 358 dev_kfree_skb_any(skb); 359 return entries; 360 } 361 362 363 static int 364 vmxnet3_tq_tx_complete(struct vmxnet3_tx_queue *tq, 365 struct vmxnet3_adapter *adapter) 366 { 367 int completed = 0; 368 union Vmxnet3_GenericDesc *gdesc; 369 370 gdesc = tq->comp_ring.base + tq->comp_ring.next2proc; 371 while (VMXNET3_TCD_GET_GEN(&gdesc->tcd) == tq->comp_ring.gen) { 372 completed += vmxnet3_unmap_pkt(VMXNET3_TCD_GET_TXIDX( 373 &gdesc->tcd), tq, adapter->pdev, 374 adapter); 375 376 vmxnet3_comp_ring_adv_next2proc(&tq->comp_ring); 377 gdesc = tq->comp_ring.base + tq->comp_ring.next2proc; 378 } 379 380 if (completed) { 381 spin_lock(&tq->tx_lock); 382 if (unlikely(vmxnet3_tq_stopped(tq, adapter) && 383 vmxnet3_cmd_ring_desc_avail(&tq->tx_ring) > 384 VMXNET3_WAKE_QUEUE_THRESHOLD(tq) && 385 netif_carrier_ok(adapter->netdev))) { 386 vmxnet3_tq_wake(tq, adapter); 387 } 388 spin_unlock(&tq->tx_lock); 389 } 390 return completed; 391 } 392 393 394 static void 395 vmxnet3_tq_cleanup(struct vmxnet3_tx_queue *tq, 396 struct vmxnet3_adapter *adapter) 397 { 398 int i; 399 400 while (tq->tx_ring.next2comp != tq->tx_ring.next2fill) { 401 struct vmxnet3_tx_buf_info *tbi; 402 403 tbi = tq->buf_info + tq->tx_ring.next2comp; 404 405 vmxnet3_unmap_tx_buf(tbi, adapter->pdev); 406 if (tbi->skb) { 407 dev_kfree_skb_any(tbi->skb); 408 tbi->skb = NULL; 409 } 410 vmxnet3_cmd_ring_adv_next2comp(&tq->tx_ring); 411 } 412 413 /* sanity check, verify all buffers are indeed unmapped and freed */ 414 for (i = 0; i < tq->tx_ring.size; i++) { 415 BUG_ON(tq->buf_info[i].skb != NULL || 416 tq->buf_info[i].map_type != VMXNET3_MAP_NONE); 417 } 418 419 tq->tx_ring.gen = VMXNET3_INIT_GEN; 420 tq->tx_ring.next2fill = tq->tx_ring.next2comp = 0; 421 422 tq->comp_ring.gen = VMXNET3_INIT_GEN; 423 tq->comp_ring.next2proc = 0; 424 } 425 426 427 static void 428 vmxnet3_tq_destroy(struct vmxnet3_tx_queue *tq, 429 struct vmxnet3_adapter *adapter) 430 { 431 if (tq->tx_ring.base) { 432 dma_free_coherent(&adapter->pdev->dev, tq->tx_ring.size * 433 sizeof(struct Vmxnet3_TxDesc), 434 tq->tx_ring.base, tq->tx_ring.basePA); 435 tq->tx_ring.base = NULL; 436 } 437 if (tq->data_ring.base) { 438 dma_free_coherent(&adapter->pdev->dev, 439 tq->data_ring.size * tq->txdata_desc_size, 440 tq->data_ring.base, tq->data_ring.basePA); 441 tq->data_ring.base = NULL; 442 } 443 if (tq->comp_ring.base) { 444 dma_free_coherent(&adapter->pdev->dev, tq->comp_ring.size * 445 sizeof(struct Vmxnet3_TxCompDesc), 446 tq->comp_ring.base, tq->comp_ring.basePA); 447 tq->comp_ring.base = NULL; 448 } 449 if (tq->buf_info) { 450 dma_free_coherent(&adapter->pdev->dev, 451 tq->tx_ring.size * sizeof(tq->buf_info[0]), 452 tq->buf_info, tq->buf_info_pa); 453 tq->buf_info = NULL; 454 } 455 } 456 457 458 /* Destroy all tx queues */ 459 void 460 vmxnet3_tq_destroy_all(struct vmxnet3_adapter *adapter) 461 { 462 int i; 463 464 for (i = 0; i < adapter->num_tx_queues; i++) 465 vmxnet3_tq_destroy(&adapter->tx_queue[i], adapter); 466 } 467 468 469 static void 470 vmxnet3_tq_init(struct vmxnet3_tx_queue *tq, 471 struct vmxnet3_adapter *adapter) 472 { 473 int i; 474 475 /* reset the tx ring contents to 0 and reset the tx ring states */ 476 memset(tq->tx_ring.base, 0, tq->tx_ring.size * 477 sizeof(struct Vmxnet3_TxDesc)); 478 tq->tx_ring.next2fill = tq->tx_ring.next2comp = 0; 479 tq->tx_ring.gen = VMXNET3_INIT_GEN; 480 481 memset(tq->data_ring.base, 0, 482 tq->data_ring.size * tq->txdata_desc_size); 483 484 /* reset the tx comp ring contents to 0 and reset comp ring states */ 485 memset(tq->comp_ring.base, 0, tq->comp_ring.size * 486 sizeof(struct Vmxnet3_TxCompDesc)); 487 tq->comp_ring.next2proc = 0; 488 tq->comp_ring.gen = VMXNET3_INIT_GEN; 489 490 /* reset the bookkeeping data */ 491 memset(tq->buf_info, 0, sizeof(tq->buf_info[0]) * tq->tx_ring.size); 492 for (i = 0; i < tq->tx_ring.size; i++) 493 tq->buf_info[i].map_type = VMXNET3_MAP_NONE; 494 495 /* stats are not reset */ 496 } 497 498 499 static int 500 vmxnet3_tq_create(struct vmxnet3_tx_queue *tq, 501 struct vmxnet3_adapter *adapter) 502 { 503 size_t sz; 504 505 BUG_ON(tq->tx_ring.base || tq->data_ring.base || 506 tq->comp_ring.base || tq->buf_info); 507 508 tq->tx_ring.base = dma_alloc_coherent(&adapter->pdev->dev, 509 tq->tx_ring.size * sizeof(struct Vmxnet3_TxDesc), 510 &tq->tx_ring.basePA, GFP_KERNEL); 511 if (!tq->tx_ring.base) { 512 netdev_err(adapter->netdev, "failed to allocate tx ring\n"); 513 goto err; 514 } 515 516 tq->data_ring.base = dma_alloc_coherent(&adapter->pdev->dev, 517 tq->data_ring.size * tq->txdata_desc_size, 518 &tq->data_ring.basePA, GFP_KERNEL); 519 if (!tq->data_ring.base) { 520 netdev_err(adapter->netdev, "failed to allocate tx data ring\n"); 521 goto err; 522 } 523 524 tq->comp_ring.base = dma_alloc_coherent(&adapter->pdev->dev, 525 tq->comp_ring.size * sizeof(struct Vmxnet3_TxCompDesc), 526 &tq->comp_ring.basePA, GFP_KERNEL); 527 if (!tq->comp_ring.base) { 528 netdev_err(adapter->netdev, "failed to allocate tx comp ring\n"); 529 goto err; 530 } 531 532 sz = tq->tx_ring.size * sizeof(tq->buf_info[0]); 533 tq->buf_info = dma_zalloc_coherent(&adapter->pdev->dev, sz, 534 &tq->buf_info_pa, GFP_KERNEL); 535 if (!tq->buf_info) 536 goto err; 537 538 return 0; 539 540 err: 541 vmxnet3_tq_destroy(tq, adapter); 542 return -ENOMEM; 543 } 544 545 static void 546 vmxnet3_tq_cleanup_all(struct vmxnet3_adapter *adapter) 547 { 548 int i; 549 550 for (i = 0; i < adapter->num_tx_queues; i++) 551 vmxnet3_tq_cleanup(&adapter->tx_queue[i], adapter); 552 } 553 554 /* 555 * starting from ring->next2fill, allocate rx buffers for the given ring 556 * of the rx queue and update the rx desc. stop after @num_to_alloc buffers 557 * are allocated or allocation fails 558 */ 559 560 static int 561 vmxnet3_rq_alloc_rx_buf(struct vmxnet3_rx_queue *rq, u32 ring_idx, 562 int num_to_alloc, struct vmxnet3_adapter *adapter) 563 { 564 int num_allocated = 0; 565 struct vmxnet3_rx_buf_info *rbi_base = rq->buf_info[ring_idx]; 566 struct vmxnet3_cmd_ring *ring = &rq->rx_ring[ring_idx]; 567 u32 val; 568 569 while (num_allocated <= num_to_alloc) { 570 struct vmxnet3_rx_buf_info *rbi; 571 union Vmxnet3_GenericDesc *gd; 572 573 rbi = rbi_base + ring->next2fill; 574 gd = ring->base + ring->next2fill; 575 576 if (rbi->buf_type == VMXNET3_RX_BUF_SKB) { 577 if (rbi->skb == NULL) { 578 rbi->skb = __netdev_alloc_skb_ip_align(adapter->netdev, 579 rbi->len, 580 GFP_KERNEL); 581 if (unlikely(rbi->skb == NULL)) { 582 rq->stats.rx_buf_alloc_failure++; 583 break; 584 } 585 586 rbi->dma_addr = dma_map_single( 587 &adapter->pdev->dev, 588 rbi->skb->data, rbi->len, 589 PCI_DMA_FROMDEVICE); 590 if (dma_mapping_error(&adapter->pdev->dev, 591 rbi->dma_addr)) { 592 dev_kfree_skb_any(rbi->skb); 593 rq->stats.rx_buf_alloc_failure++; 594 break; 595 } 596 } else { 597 /* rx buffer skipped by the device */ 598 } 599 val = VMXNET3_RXD_BTYPE_HEAD << VMXNET3_RXD_BTYPE_SHIFT; 600 } else { 601 BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_PAGE || 602 rbi->len != PAGE_SIZE); 603 604 if (rbi->page == NULL) { 605 rbi->page = alloc_page(GFP_ATOMIC); 606 if (unlikely(rbi->page == NULL)) { 607 rq->stats.rx_buf_alloc_failure++; 608 break; 609 } 610 rbi->dma_addr = dma_map_page( 611 &adapter->pdev->dev, 612 rbi->page, 0, PAGE_SIZE, 613 PCI_DMA_FROMDEVICE); 614 if (dma_mapping_error(&adapter->pdev->dev, 615 rbi->dma_addr)) { 616 put_page(rbi->page); 617 rq->stats.rx_buf_alloc_failure++; 618 break; 619 } 620 } else { 621 /* rx buffers skipped by the device */ 622 } 623 val = VMXNET3_RXD_BTYPE_BODY << VMXNET3_RXD_BTYPE_SHIFT; 624 } 625 626 gd->rxd.addr = cpu_to_le64(rbi->dma_addr); 627 gd->dword[2] = cpu_to_le32((!ring->gen << VMXNET3_RXD_GEN_SHIFT) 628 | val | rbi->len); 629 630 /* Fill the last buffer but dont mark it ready, or else the 631 * device will think that the queue is full */ 632 if (num_allocated == num_to_alloc) 633 break; 634 635 gd->dword[2] |= cpu_to_le32(ring->gen << VMXNET3_RXD_GEN_SHIFT); 636 num_allocated++; 637 vmxnet3_cmd_ring_adv_next2fill(ring); 638 } 639 640 netdev_dbg(adapter->netdev, 641 "alloc_rx_buf: %d allocated, next2fill %u, next2comp %u\n", 642 num_allocated, ring->next2fill, ring->next2comp); 643 644 /* so that the device can distinguish a full ring and an empty ring */ 645 BUG_ON(num_allocated != 0 && ring->next2fill == ring->next2comp); 646 647 return num_allocated; 648 } 649 650 651 static void 652 vmxnet3_append_frag(struct sk_buff *skb, struct Vmxnet3_RxCompDesc *rcd, 653 struct vmxnet3_rx_buf_info *rbi) 654 { 655 struct skb_frag_struct *frag = skb_shinfo(skb)->frags + 656 skb_shinfo(skb)->nr_frags; 657 658 BUG_ON(skb_shinfo(skb)->nr_frags >= MAX_SKB_FRAGS); 659 660 __skb_frag_set_page(frag, rbi->page); 661 frag->page_offset = 0; 662 skb_frag_size_set(frag, rcd->len); 663 skb->data_len += rcd->len; 664 skb->truesize += PAGE_SIZE; 665 skb_shinfo(skb)->nr_frags++; 666 } 667 668 669 static int 670 vmxnet3_map_pkt(struct sk_buff *skb, struct vmxnet3_tx_ctx *ctx, 671 struct vmxnet3_tx_queue *tq, struct pci_dev *pdev, 672 struct vmxnet3_adapter *adapter) 673 { 674 u32 dw2, len; 675 unsigned long buf_offset; 676 int i; 677 union Vmxnet3_GenericDesc *gdesc; 678 struct vmxnet3_tx_buf_info *tbi = NULL; 679 680 BUG_ON(ctx->copy_size > skb_headlen(skb)); 681 682 /* use the previous gen bit for the SOP desc */ 683 dw2 = (tq->tx_ring.gen ^ 0x1) << VMXNET3_TXD_GEN_SHIFT; 684 685 ctx->sop_txd = tq->tx_ring.base + tq->tx_ring.next2fill; 686 gdesc = ctx->sop_txd; /* both loops below can be skipped */ 687 688 /* no need to map the buffer if headers are copied */ 689 if (ctx->copy_size) { 690 ctx->sop_txd->txd.addr = cpu_to_le64(tq->data_ring.basePA + 691 tq->tx_ring.next2fill * 692 tq->txdata_desc_size); 693 ctx->sop_txd->dword[2] = cpu_to_le32(dw2 | ctx->copy_size); 694 ctx->sop_txd->dword[3] = 0; 695 696 tbi = tq->buf_info + tq->tx_ring.next2fill; 697 tbi->map_type = VMXNET3_MAP_NONE; 698 699 netdev_dbg(adapter->netdev, 700 "txd[%u]: 0x%Lx 0x%x 0x%x\n", 701 tq->tx_ring.next2fill, 702 le64_to_cpu(ctx->sop_txd->txd.addr), 703 ctx->sop_txd->dword[2], ctx->sop_txd->dword[3]); 704 vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring); 705 706 /* use the right gen for non-SOP desc */ 707 dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT; 708 } 709 710 /* linear part can use multiple tx desc if it's big */ 711 len = skb_headlen(skb) - ctx->copy_size; 712 buf_offset = ctx->copy_size; 713 while (len) { 714 u32 buf_size; 715 716 if (len < VMXNET3_MAX_TX_BUF_SIZE) { 717 buf_size = len; 718 dw2 |= len; 719 } else { 720 buf_size = VMXNET3_MAX_TX_BUF_SIZE; 721 /* spec says that for TxDesc.len, 0 == 2^14 */ 722 } 723 724 tbi = tq->buf_info + tq->tx_ring.next2fill; 725 tbi->map_type = VMXNET3_MAP_SINGLE; 726 tbi->dma_addr = dma_map_single(&adapter->pdev->dev, 727 skb->data + buf_offset, buf_size, 728 PCI_DMA_TODEVICE); 729 if (dma_mapping_error(&adapter->pdev->dev, tbi->dma_addr)) 730 return -EFAULT; 731 732 tbi->len = buf_size; 733 734 gdesc = tq->tx_ring.base + tq->tx_ring.next2fill; 735 BUG_ON(gdesc->txd.gen == tq->tx_ring.gen); 736 737 gdesc->txd.addr = cpu_to_le64(tbi->dma_addr); 738 gdesc->dword[2] = cpu_to_le32(dw2); 739 gdesc->dword[3] = 0; 740 741 netdev_dbg(adapter->netdev, 742 "txd[%u]: 0x%Lx 0x%x 0x%x\n", 743 tq->tx_ring.next2fill, le64_to_cpu(gdesc->txd.addr), 744 le32_to_cpu(gdesc->dword[2]), gdesc->dword[3]); 745 vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring); 746 dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT; 747 748 len -= buf_size; 749 buf_offset += buf_size; 750 } 751 752 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 753 const struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i]; 754 u32 buf_size; 755 756 buf_offset = 0; 757 len = skb_frag_size(frag); 758 while (len) { 759 tbi = tq->buf_info + tq->tx_ring.next2fill; 760 if (len < VMXNET3_MAX_TX_BUF_SIZE) { 761 buf_size = len; 762 dw2 |= len; 763 } else { 764 buf_size = VMXNET3_MAX_TX_BUF_SIZE; 765 /* spec says that for TxDesc.len, 0 == 2^14 */ 766 } 767 tbi->map_type = VMXNET3_MAP_PAGE; 768 tbi->dma_addr = skb_frag_dma_map(&adapter->pdev->dev, frag, 769 buf_offset, buf_size, 770 DMA_TO_DEVICE); 771 if (dma_mapping_error(&adapter->pdev->dev, tbi->dma_addr)) 772 return -EFAULT; 773 774 tbi->len = buf_size; 775 776 gdesc = tq->tx_ring.base + tq->tx_ring.next2fill; 777 BUG_ON(gdesc->txd.gen == tq->tx_ring.gen); 778 779 gdesc->txd.addr = cpu_to_le64(tbi->dma_addr); 780 gdesc->dword[2] = cpu_to_le32(dw2); 781 gdesc->dword[3] = 0; 782 783 netdev_dbg(adapter->netdev, 784 "txd[%u]: 0x%llx %u %u\n", 785 tq->tx_ring.next2fill, le64_to_cpu(gdesc->txd.addr), 786 le32_to_cpu(gdesc->dword[2]), gdesc->dword[3]); 787 vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring); 788 dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT; 789 790 len -= buf_size; 791 buf_offset += buf_size; 792 } 793 } 794 795 ctx->eop_txd = gdesc; 796 797 /* set the last buf_info for the pkt */ 798 tbi->skb = skb; 799 tbi->sop_idx = ctx->sop_txd - tq->tx_ring.base; 800 801 return 0; 802 } 803 804 805 /* Init all tx queues */ 806 static void 807 vmxnet3_tq_init_all(struct vmxnet3_adapter *adapter) 808 { 809 int i; 810 811 for (i = 0; i < adapter->num_tx_queues; i++) 812 vmxnet3_tq_init(&adapter->tx_queue[i], adapter); 813 } 814 815 816 /* 817 * parse relevant protocol headers: 818 * For a tso pkt, relevant headers are L2/3/4 including options 819 * For a pkt requesting csum offloading, they are L2/3 and may include L4 820 * if it's a TCP/UDP pkt 821 * 822 * Returns: 823 * -1: error happens during parsing 824 * 0: protocol headers parsed, but too big to be copied 825 * 1: protocol headers parsed and copied 826 * 827 * Other effects: 828 * 1. related *ctx fields are updated. 829 * 2. ctx->copy_size is # of bytes copied 830 * 3. the portion to be copied is guaranteed to be in the linear part 831 * 832 */ 833 static int 834 vmxnet3_parse_hdr(struct sk_buff *skb, struct vmxnet3_tx_queue *tq, 835 struct vmxnet3_tx_ctx *ctx, 836 struct vmxnet3_adapter *adapter) 837 { 838 u8 protocol = 0; 839 840 if (ctx->mss) { /* TSO */ 841 ctx->eth_ip_hdr_size = skb_transport_offset(skb); 842 ctx->l4_hdr_size = tcp_hdrlen(skb); 843 ctx->copy_size = ctx->eth_ip_hdr_size + ctx->l4_hdr_size; 844 } else { 845 if (skb->ip_summed == CHECKSUM_PARTIAL) { 846 ctx->eth_ip_hdr_size = skb_checksum_start_offset(skb); 847 848 if (ctx->ipv4) { 849 const struct iphdr *iph = ip_hdr(skb); 850 851 protocol = iph->protocol; 852 } else if (ctx->ipv6) { 853 const struct ipv6hdr *ipv6h = ipv6_hdr(skb); 854 855 protocol = ipv6h->nexthdr; 856 } 857 858 switch (protocol) { 859 case IPPROTO_TCP: 860 ctx->l4_hdr_size = tcp_hdrlen(skb); 861 break; 862 case IPPROTO_UDP: 863 ctx->l4_hdr_size = sizeof(struct udphdr); 864 break; 865 default: 866 ctx->l4_hdr_size = 0; 867 break; 868 } 869 870 ctx->copy_size = min(ctx->eth_ip_hdr_size + 871 ctx->l4_hdr_size, skb->len); 872 } else { 873 ctx->eth_ip_hdr_size = 0; 874 ctx->l4_hdr_size = 0; 875 /* copy as much as allowed */ 876 ctx->copy_size = min_t(unsigned int, 877 tq->txdata_desc_size, 878 skb_headlen(skb)); 879 } 880 881 if (skb->len <= VMXNET3_HDR_COPY_SIZE) 882 ctx->copy_size = skb->len; 883 884 /* make sure headers are accessible directly */ 885 if (unlikely(!pskb_may_pull(skb, ctx->copy_size))) 886 goto err; 887 } 888 889 if (unlikely(ctx->copy_size > tq->txdata_desc_size)) { 890 tq->stats.oversized_hdr++; 891 ctx->copy_size = 0; 892 return 0; 893 } 894 895 return 1; 896 err: 897 return -1; 898 } 899 900 /* 901 * copy relevant protocol headers to the transmit ring: 902 * For a tso pkt, relevant headers are L2/3/4 including options 903 * For a pkt requesting csum offloading, they are L2/3 and may include L4 904 * if it's a TCP/UDP pkt 905 * 906 * 907 * Note that this requires that vmxnet3_parse_hdr be called first to set the 908 * appropriate bits in ctx first 909 */ 910 static void 911 vmxnet3_copy_hdr(struct sk_buff *skb, struct vmxnet3_tx_queue *tq, 912 struct vmxnet3_tx_ctx *ctx, 913 struct vmxnet3_adapter *adapter) 914 { 915 struct Vmxnet3_TxDataDesc *tdd; 916 917 tdd = (struct Vmxnet3_TxDataDesc *)((u8 *)tq->data_ring.base + 918 tq->tx_ring.next2fill * 919 tq->txdata_desc_size); 920 921 memcpy(tdd->data, skb->data, ctx->copy_size); 922 netdev_dbg(adapter->netdev, 923 "copy %u bytes to dataRing[%u]\n", 924 ctx->copy_size, tq->tx_ring.next2fill); 925 } 926 927 928 static void 929 vmxnet3_prepare_tso(struct sk_buff *skb, 930 struct vmxnet3_tx_ctx *ctx) 931 { 932 struct tcphdr *tcph = tcp_hdr(skb); 933 934 if (ctx->ipv4) { 935 struct iphdr *iph = ip_hdr(skb); 936 937 iph->check = 0; 938 tcph->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr, 0, 939 IPPROTO_TCP, 0); 940 } else if (ctx->ipv6) { 941 struct ipv6hdr *iph = ipv6_hdr(skb); 942 943 tcph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, 0, 944 IPPROTO_TCP, 0); 945 } 946 } 947 948 static int txd_estimate(const struct sk_buff *skb) 949 { 950 int count = VMXNET3_TXD_NEEDED(skb_headlen(skb)) + 1; 951 int i; 952 953 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 954 const struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i]; 955 956 count += VMXNET3_TXD_NEEDED(skb_frag_size(frag)); 957 } 958 return count; 959 } 960 961 /* 962 * Transmits a pkt thru a given tq 963 * Returns: 964 * NETDEV_TX_OK: descriptors are setup successfully 965 * NETDEV_TX_OK: error occurred, the pkt is dropped 966 * NETDEV_TX_BUSY: tx ring is full, queue is stopped 967 * 968 * Side-effects: 969 * 1. tx ring may be changed 970 * 2. tq stats may be updated accordingly 971 * 3. shared->txNumDeferred may be updated 972 */ 973 974 static int 975 vmxnet3_tq_xmit(struct sk_buff *skb, struct vmxnet3_tx_queue *tq, 976 struct vmxnet3_adapter *adapter, struct net_device *netdev) 977 { 978 int ret; 979 u32 count; 980 unsigned long flags; 981 struct vmxnet3_tx_ctx ctx; 982 union Vmxnet3_GenericDesc *gdesc; 983 #ifdef __BIG_ENDIAN_BITFIELD 984 /* Use temporary descriptor to avoid touching bits multiple times */ 985 union Vmxnet3_GenericDesc tempTxDesc; 986 #endif 987 988 count = txd_estimate(skb); 989 990 ctx.ipv4 = (vlan_get_protocol(skb) == cpu_to_be16(ETH_P_IP)); 991 ctx.ipv6 = (vlan_get_protocol(skb) == cpu_to_be16(ETH_P_IPV6)); 992 993 ctx.mss = skb_shinfo(skb)->gso_size; 994 if (ctx.mss) { 995 if (skb_header_cloned(skb)) { 996 if (unlikely(pskb_expand_head(skb, 0, 0, 997 GFP_ATOMIC) != 0)) { 998 tq->stats.drop_tso++; 999 goto drop_pkt; 1000 } 1001 tq->stats.copy_skb_header++; 1002 } 1003 vmxnet3_prepare_tso(skb, &ctx); 1004 } else { 1005 if (unlikely(count > VMXNET3_MAX_TXD_PER_PKT)) { 1006 1007 /* non-tso pkts must not use more than 1008 * VMXNET3_MAX_TXD_PER_PKT entries 1009 */ 1010 if (skb_linearize(skb) != 0) { 1011 tq->stats.drop_too_many_frags++; 1012 goto drop_pkt; 1013 } 1014 tq->stats.linearized++; 1015 1016 /* recalculate the # of descriptors to use */ 1017 count = VMXNET3_TXD_NEEDED(skb_headlen(skb)) + 1; 1018 } 1019 } 1020 1021 ret = vmxnet3_parse_hdr(skb, tq, &ctx, adapter); 1022 if (ret >= 0) { 1023 BUG_ON(ret <= 0 && ctx.copy_size != 0); 1024 /* hdrs parsed, check against other limits */ 1025 if (ctx.mss) { 1026 if (unlikely(ctx.eth_ip_hdr_size + ctx.l4_hdr_size > 1027 VMXNET3_MAX_TX_BUF_SIZE)) { 1028 tq->stats.drop_oversized_hdr++; 1029 goto drop_pkt; 1030 } 1031 } else { 1032 if (skb->ip_summed == CHECKSUM_PARTIAL) { 1033 if (unlikely(ctx.eth_ip_hdr_size + 1034 skb->csum_offset > 1035 VMXNET3_MAX_CSUM_OFFSET)) { 1036 tq->stats.drop_oversized_hdr++; 1037 goto drop_pkt; 1038 } 1039 } 1040 } 1041 } else { 1042 tq->stats.drop_hdr_inspect_err++; 1043 goto drop_pkt; 1044 } 1045 1046 spin_lock_irqsave(&tq->tx_lock, flags); 1047 1048 if (count > vmxnet3_cmd_ring_desc_avail(&tq->tx_ring)) { 1049 tq->stats.tx_ring_full++; 1050 netdev_dbg(adapter->netdev, 1051 "tx queue stopped on %s, next2comp %u" 1052 " next2fill %u\n", adapter->netdev->name, 1053 tq->tx_ring.next2comp, tq->tx_ring.next2fill); 1054 1055 vmxnet3_tq_stop(tq, adapter); 1056 spin_unlock_irqrestore(&tq->tx_lock, flags); 1057 return NETDEV_TX_BUSY; 1058 } 1059 1060 1061 vmxnet3_copy_hdr(skb, tq, &ctx, adapter); 1062 1063 /* fill tx descs related to addr & len */ 1064 if (vmxnet3_map_pkt(skb, &ctx, tq, adapter->pdev, adapter)) 1065 goto unlock_drop_pkt; 1066 1067 /* setup the EOP desc */ 1068 ctx.eop_txd->dword[3] = cpu_to_le32(VMXNET3_TXD_CQ | VMXNET3_TXD_EOP); 1069 1070 /* setup the SOP desc */ 1071 #ifdef __BIG_ENDIAN_BITFIELD 1072 gdesc = &tempTxDesc; 1073 gdesc->dword[2] = ctx.sop_txd->dword[2]; 1074 gdesc->dword[3] = ctx.sop_txd->dword[3]; 1075 #else 1076 gdesc = ctx.sop_txd; 1077 #endif 1078 if (ctx.mss) { 1079 gdesc->txd.hlen = ctx.eth_ip_hdr_size + ctx.l4_hdr_size; 1080 gdesc->txd.om = VMXNET3_OM_TSO; 1081 gdesc->txd.msscof = ctx.mss; 1082 le32_add_cpu(&tq->shared->txNumDeferred, (skb->len - 1083 gdesc->txd.hlen + ctx.mss - 1) / ctx.mss); 1084 } else { 1085 if (skb->ip_summed == CHECKSUM_PARTIAL) { 1086 gdesc->txd.hlen = ctx.eth_ip_hdr_size; 1087 gdesc->txd.om = VMXNET3_OM_CSUM; 1088 gdesc->txd.msscof = ctx.eth_ip_hdr_size + 1089 skb->csum_offset; 1090 } else { 1091 gdesc->txd.om = 0; 1092 gdesc->txd.msscof = 0; 1093 } 1094 le32_add_cpu(&tq->shared->txNumDeferred, 1); 1095 } 1096 1097 if (skb_vlan_tag_present(skb)) { 1098 gdesc->txd.ti = 1; 1099 gdesc->txd.tci = skb_vlan_tag_get(skb); 1100 } 1101 1102 /* finally flips the GEN bit of the SOP desc. */ 1103 gdesc->dword[2] = cpu_to_le32(le32_to_cpu(gdesc->dword[2]) ^ 1104 VMXNET3_TXD_GEN); 1105 #ifdef __BIG_ENDIAN_BITFIELD 1106 /* Finished updating in bitfields of Tx Desc, so write them in original 1107 * place. 1108 */ 1109 vmxnet3_TxDescToLe((struct Vmxnet3_TxDesc *)gdesc, 1110 (struct Vmxnet3_TxDesc *)ctx.sop_txd); 1111 gdesc = ctx.sop_txd; 1112 #endif 1113 netdev_dbg(adapter->netdev, 1114 "txd[%u]: SOP 0x%Lx 0x%x 0x%x\n", 1115 (u32)(ctx.sop_txd - 1116 tq->tx_ring.base), le64_to_cpu(gdesc->txd.addr), 1117 le32_to_cpu(gdesc->dword[2]), le32_to_cpu(gdesc->dword[3])); 1118 1119 spin_unlock_irqrestore(&tq->tx_lock, flags); 1120 1121 if (le32_to_cpu(tq->shared->txNumDeferred) >= 1122 le32_to_cpu(tq->shared->txThreshold)) { 1123 tq->shared->txNumDeferred = 0; 1124 VMXNET3_WRITE_BAR0_REG(adapter, 1125 VMXNET3_REG_TXPROD + tq->qid * 8, 1126 tq->tx_ring.next2fill); 1127 } 1128 1129 return NETDEV_TX_OK; 1130 1131 unlock_drop_pkt: 1132 spin_unlock_irqrestore(&tq->tx_lock, flags); 1133 drop_pkt: 1134 tq->stats.drop_total++; 1135 dev_kfree_skb_any(skb); 1136 return NETDEV_TX_OK; 1137 } 1138 1139 1140 static netdev_tx_t 1141 vmxnet3_xmit_frame(struct sk_buff *skb, struct net_device *netdev) 1142 { 1143 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 1144 1145 BUG_ON(skb->queue_mapping > adapter->num_tx_queues); 1146 return vmxnet3_tq_xmit(skb, 1147 &adapter->tx_queue[skb->queue_mapping], 1148 adapter, netdev); 1149 } 1150 1151 1152 static void 1153 vmxnet3_rx_csum(struct vmxnet3_adapter *adapter, 1154 struct sk_buff *skb, 1155 union Vmxnet3_GenericDesc *gdesc) 1156 { 1157 if (!gdesc->rcd.cnc && adapter->netdev->features & NETIF_F_RXCSUM) { 1158 if (gdesc->rcd.v4 && 1159 (le32_to_cpu(gdesc->dword[3]) & 1160 VMXNET3_RCD_CSUM_OK) == VMXNET3_RCD_CSUM_OK) { 1161 skb->ip_summed = CHECKSUM_UNNECESSARY; 1162 BUG_ON(!(gdesc->rcd.tcp || gdesc->rcd.udp)); 1163 BUG_ON(gdesc->rcd.frg); 1164 } else if (gdesc->rcd.v6 && (le32_to_cpu(gdesc->dword[3]) & 1165 (1 << VMXNET3_RCD_TUC_SHIFT))) { 1166 skb->ip_summed = CHECKSUM_UNNECESSARY; 1167 BUG_ON(!(gdesc->rcd.tcp || gdesc->rcd.udp)); 1168 BUG_ON(gdesc->rcd.frg); 1169 } else { 1170 if (gdesc->rcd.csum) { 1171 skb->csum = htons(gdesc->rcd.csum); 1172 skb->ip_summed = CHECKSUM_PARTIAL; 1173 } else { 1174 skb_checksum_none_assert(skb); 1175 } 1176 } 1177 } else { 1178 skb_checksum_none_assert(skb); 1179 } 1180 } 1181 1182 1183 static void 1184 vmxnet3_rx_error(struct vmxnet3_rx_queue *rq, struct Vmxnet3_RxCompDesc *rcd, 1185 struct vmxnet3_rx_ctx *ctx, struct vmxnet3_adapter *adapter) 1186 { 1187 rq->stats.drop_err++; 1188 if (!rcd->fcs) 1189 rq->stats.drop_fcs++; 1190 1191 rq->stats.drop_total++; 1192 1193 /* 1194 * We do not unmap and chain the rx buffer to the skb. 1195 * We basically pretend this buffer is not used and will be recycled 1196 * by vmxnet3_rq_alloc_rx_buf() 1197 */ 1198 1199 /* 1200 * ctx->skb may be NULL if this is the first and the only one 1201 * desc for the pkt 1202 */ 1203 if (ctx->skb) 1204 dev_kfree_skb_irq(ctx->skb); 1205 1206 ctx->skb = NULL; 1207 } 1208 1209 1210 static u32 1211 vmxnet3_get_hdr_len(struct vmxnet3_adapter *adapter, struct sk_buff *skb, 1212 union Vmxnet3_GenericDesc *gdesc) 1213 { 1214 u32 hlen, maplen; 1215 union { 1216 void *ptr; 1217 struct ethhdr *eth; 1218 struct iphdr *ipv4; 1219 struct ipv6hdr *ipv6; 1220 struct tcphdr *tcp; 1221 } hdr; 1222 BUG_ON(gdesc->rcd.tcp == 0); 1223 1224 maplen = skb_headlen(skb); 1225 if (unlikely(sizeof(struct iphdr) + sizeof(struct tcphdr) > maplen)) 1226 return 0; 1227 1228 hdr.eth = eth_hdr(skb); 1229 if (gdesc->rcd.v4) { 1230 BUG_ON(hdr.eth->h_proto != htons(ETH_P_IP)); 1231 hdr.ptr += sizeof(struct ethhdr); 1232 BUG_ON(hdr.ipv4->protocol != IPPROTO_TCP); 1233 hlen = hdr.ipv4->ihl << 2; 1234 hdr.ptr += hdr.ipv4->ihl << 2; 1235 } else if (gdesc->rcd.v6) { 1236 BUG_ON(hdr.eth->h_proto != htons(ETH_P_IPV6)); 1237 hdr.ptr += sizeof(struct ethhdr); 1238 /* Use an estimated value, since we also need to handle 1239 * TSO case. 1240 */ 1241 if (hdr.ipv6->nexthdr != IPPROTO_TCP) 1242 return sizeof(struct ipv6hdr) + sizeof(struct tcphdr); 1243 hlen = sizeof(struct ipv6hdr); 1244 hdr.ptr += sizeof(struct ipv6hdr); 1245 } else { 1246 /* Non-IP pkt, dont estimate header length */ 1247 return 0; 1248 } 1249 1250 if (hlen + sizeof(struct tcphdr) > maplen) 1251 return 0; 1252 1253 return (hlen + (hdr.tcp->doff << 2)); 1254 } 1255 1256 static int 1257 vmxnet3_rq_rx_complete(struct vmxnet3_rx_queue *rq, 1258 struct vmxnet3_adapter *adapter, int quota) 1259 { 1260 static const u32 rxprod_reg[2] = { 1261 VMXNET3_REG_RXPROD, VMXNET3_REG_RXPROD2 1262 }; 1263 u32 num_pkts = 0; 1264 bool skip_page_frags = false; 1265 struct Vmxnet3_RxCompDesc *rcd; 1266 struct vmxnet3_rx_ctx *ctx = &rq->rx_ctx; 1267 u16 segCnt = 0, mss = 0; 1268 #ifdef __BIG_ENDIAN_BITFIELD 1269 struct Vmxnet3_RxDesc rxCmdDesc; 1270 struct Vmxnet3_RxCompDesc rxComp; 1271 #endif 1272 vmxnet3_getRxComp(rcd, &rq->comp_ring.base[rq->comp_ring.next2proc].rcd, 1273 &rxComp); 1274 while (rcd->gen == rq->comp_ring.gen) { 1275 struct vmxnet3_rx_buf_info *rbi; 1276 struct sk_buff *skb, *new_skb = NULL; 1277 struct page *new_page = NULL; 1278 dma_addr_t new_dma_addr; 1279 int num_to_alloc; 1280 struct Vmxnet3_RxDesc *rxd; 1281 u32 idx, ring_idx; 1282 struct vmxnet3_cmd_ring *ring = NULL; 1283 if (num_pkts >= quota) { 1284 /* we may stop even before we see the EOP desc of 1285 * the current pkt 1286 */ 1287 break; 1288 } 1289 BUG_ON(rcd->rqID != rq->qid && rcd->rqID != rq->qid2 && 1290 rcd->rqID != rq->dataRingQid); 1291 idx = rcd->rxdIdx; 1292 ring_idx = VMXNET3_GET_RING_IDX(adapter, rcd->rqID); 1293 ring = rq->rx_ring + ring_idx; 1294 vmxnet3_getRxDesc(rxd, &rq->rx_ring[ring_idx].base[idx].rxd, 1295 &rxCmdDesc); 1296 rbi = rq->buf_info[ring_idx] + idx; 1297 1298 BUG_ON(rxd->addr != rbi->dma_addr || 1299 rxd->len != rbi->len); 1300 1301 if (unlikely(rcd->eop && rcd->err)) { 1302 vmxnet3_rx_error(rq, rcd, ctx, adapter); 1303 goto rcd_done; 1304 } 1305 1306 if (rcd->sop) { /* first buf of the pkt */ 1307 bool rxDataRingUsed; 1308 u16 len; 1309 1310 BUG_ON(rxd->btype != VMXNET3_RXD_BTYPE_HEAD || 1311 (rcd->rqID != rq->qid && 1312 rcd->rqID != rq->dataRingQid)); 1313 1314 BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_SKB); 1315 BUG_ON(ctx->skb != NULL || rbi->skb == NULL); 1316 1317 if (unlikely(rcd->len == 0)) { 1318 /* Pretend the rx buffer is skipped. */ 1319 BUG_ON(!(rcd->sop && rcd->eop)); 1320 netdev_dbg(adapter->netdev, 1321 "rxRing[%u][%u] 0 length\n", 1322 ring_idx, idx); 1323 goto rcd_done; 1324 } 1325 1326 skip_page_frags = false; 1327 ctx->skb = rbi->skb; 1328 1329 rxDataRingUsed = 1330 VMXNET3_RX_DATA_RING(adapter, rcd->rqID); 1331 len = rxDataRingUsed ? rcd->len : rbi->len; 1332 new_skb = netdev_alloc_skb_ip_align(adapter->netdev, 1333 len); 1334 if (new_skb == NULL) { 1335 /* Skb allocation failed, do not handover this 1336 * skb to stack. Reuse it. Drop the existing pkt 1337 */ 1338 rq->stats.rx_buf_alloc_failure++; 1339 ctx->skb = NULL; 1340 rq->stats.drop_total++; 1341 skip_page_frags = true; 1342 goto rcd_done; 1343 } 1344 1345 if (rxDataRingUsed) { 1346 size_t sz; 1347 1348 BUG_ON(rcd->len > rq->data_ring.desc_size); 1349 1350 ctx->skb = new_skb; 1351 sz = rcd->rxdIdx * rq->data_ring.desc_size; 1352 memcpy(new_skb->data, 1353 &rq->data_ring.base[sz], rcd->len); 1354 } else { 1355 ctx->skb = rbi->skb; 1356 1357 new_dma_addr = 1358 dma_map_single(&adapter->pdev->dev, 1359 new_skb->data, rbi->len, 1360 PCI_DMA_FROMDEVICE); 1361 if (dma_mapping_error(&adapter->pdev->dev, 1362 new_dma_addr)) { 1363 dev_kfree_skb(new_skb); 1364 /* Skb allocation failed, do not 1365 * handover this skb to stack. Reuse 1366 * it. Drop the existing pkt. 1367 */ 1368 rq->stats.rx_buf_alloc_failure++; 1369 ctx->skb = NULL; 1370 rq->stats.drop_total++; 1371 skip_page_frags = true; 1372 goto rcd_done; 1373 } 1374 1375 dma_unmap_single(&adapter->pdev->dev, 1376 rbi->dma_addr, 1377 rbi->len, 1378 PCI_DMA_FROMDEVICE); 1379 1380 /* Immediate refill */ 1381 rbi->skb = new_skb; 1382 rbi->dma_addr = new_dma_addr; 1383 rxd->addr = cpu_to_le64(rbi->dma_addr); 1384 rxd->len = rbi->len; 1385 } 1386 1387 #ifdef VMXNET3_RSS 1388 if (rcd->rssType != VMXNET3_RCD_RSS_TYPE_NONE && 1389 (adapter->netdev->features & NETIF_F_RXHASH)) 1390 skb_set_hash(ctx->skb, 1391 le32_to_cpu(rcd->rssHash), 1392 PKT_HASH_TYPE_L3); 1393 #endif 1394 skb_put(ctx->skb, rcd->len); 1395 1396 if (VMXNET3_VERSION_GE_2(adapter) && 1397 rcd->type == VMXNET3_CDTYPE_RXCOMP_LRO) { 1398 struct Vmxnet3_RxCompDescExt *rcdlro; 1399 rcdlro = (struct Vmxnet3_RxCompDescExt *)rcd; 1400 1401 segCnt = rcdlro->segCnt; 1402 WARN_ON_ONCE(segCnt == 0); 1403 mss = rcdlro->mss; 1404 if (unlikely(segCnt <= 1)) 1405 segCnt = 0; 1406 } else { 1407 segCnt = 0; 1408 } 1409 } else { 1410 BUG_ON(ctx->skb == NULL && !skip_page_frags); 1411 1412 /* non SOP buffer must be type 1 in most cases */ 1413 BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_PAGE); 1414 BUG_ON(rxd->btype != VMXNET3_RXD_BTYPE_BODY); 1415 1416 /* If an sop buffer was dropped, skip all 1417 * following non-sop fragments. They will be reused. 1418 */ 1419 if (skip_page_frags) 1420 goto rcd_done; 1421 1422 if (rcd->len) { 1423 new_page = alloc_page(GFP_ATOMIC); 1424 /* Replacement page frag could not be allocated. 1425 * Reuse this page. Drop the pkt and free the 1426 * skb which contained this page as a frag. Skip 1427 * processing all the following non-sop frags. 1428 */ 1429 if (unlikely(!new_page)) { 1430 rq->stats.rx_buf_alloc_failure++; 1431 dev_kfree_skb(ctx->skb); 1432 ctx->skb = NULL; 1433 skip_page_frags = true; 1434 goto rcd_done; 1435 } 1436 new_dma_addr = dma_map_page(&adapter->pdev->dev, 1437 new_page, 1438 0, PAGE_SIZE, 1439 PCI_DMA_FROMDEVICE); 1440 if (dma_mapping_error(&adapter->pdev->dev, 1441 new_dma_addr)) { 1442 put_page(new_page); 1443 rq->stats.rx_buf_alloc_failure++; 1444 dev_kfree_skb(ctx->skb); 1445 ctx->skb = NULL; 1446 skip_page_frags = true; 1447 goto rcd_done; 1448 } 1449 1450 dma_unmap_page(&adapter->pdev->dev, 1451 rbi->dma_addr, rbi->len, 1452 PCI_DMA_FROMDEVICE); 1453 1454 vmxnet3_append_frag(ctx->skb, rcd, rbi); 1455 1456 /* Immediate refill */ 1457 rbi->page = new_page; 1458 rbi->dma_addr = new_dma_addr; 1459 rxd->addr = cpu_to_le64(rbi->dma_addr); 1460 rxd->len = rbi->len; 1461 } 1462 } 1463 1464 1465 skb = ctx->skb; 1466 if (rcd->eop) { 1467 u32 mtu = adapter->netdev->mtu; 1468 skb->len += skb->data_len; 1469 1470 vmxnet3_rx_csum(adapter, skb, 1471 (union Vmxnet3_GenericDesc *)rcd); 1472 skb->protocol = eth_type_trans(skb, adapter->netdev); 1473 if (!rcd->tcp || !adapter->lro) 1474 goto not_lro; 1475 1476 if (segCnt != 0 && mss != 0) { 1477 skb_shinfo(skb)->gso_type = rcd->v4 ? 1478 SKB_GSO_TCPV4 : SKB_GSO_TCPV6; 1479 skb_shinfo(skb)->gso_size = mss; 1480 skb_shinfo(skb)->gso_segs = segCnt; 1481 } else if (segCnt != 0 || skb->len > mtu) { 1482 u32 hlen; 1483 1484 hlen = vmxnet3_get_hdr_len(adapter, skb, 1485 (union Vmxnet3_GenericDesc *)rcd); 1486 if (hlen == 0) 1487 goto not_lro; 1488 1489 skb_shinfo(skb)->gso_type = 1490 rcd->v4 ? SKB_GSO_TCPV4 : SKB_GSO_TCPV6; 1491 if (segCnt != 0) { 1492 skb_shinfo(skb)->gso_segs = segCnt; 1493 skb_shinfo(skb)->gso_size = 1494 DIV_ROUND_UP(skb->len - 1495 hlen, segCnt); 1496 } else { 1497 skb_shinfo(skb)->gso_size = mtu - hlen; 1498 } 1499 } 1500 not_lro: 1501 if (unlikely(rcd->ts)) 1502 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), rcd->tci); 1503 1504 if (adapter->netdev->features & NETIF_F_LRO) 1505 netif_receive_skb(skb); 1506 else 1507 napi_gro_receive(&rq->napi, skb); 1508 1509 ctx->skb = NULL; 1510 num_pkts++; 1511 } 1512 1513 rcd_done: 1514 /* device may have skipped some rx descs */ 1515 ring->next2comp = idx; 1516 num_to_alloc = vmxnet3_cmd_ring_desc_avail(ring); 1517 ring = rq->rx_ring + ring_idx; 1518 while (num_to_alloc) { 1519 vmxnet3_getRxDesc(rxd, &ring->base[ring->next2fill].rxd, 1520 &rxCmdDesc); 1521 BUG_ON(!rxd->addr); 1522 1523 /* Recv desc is ready to be used by the device */ 1524 rxd->gen = ring->gen; 1525 vmxnet3_cmd_ring_adv_next2fill(ring); 1526 num_to_alloc--; 1527 } 1528 1529 /* if needed, update the register */ 1530 if (unlikely(rq->shared->updateRxProd)) { 1531 VMXNET3_WRITE_BAR0_REG(adapter, 1532 rxprod_reg[ring_idx] + rq->qid * 8, 1533 ring->next2fill); 1534 } 1535 1536 vmxnet3_comp_ring_adv_next2proc(&rq->comp_ring); 1537 vmxnet3_getRxComp(rcd, 1538 &rq->comp_ring.base[rq->comp_ring.next2proc].rcd, &rxComp); 1539 } 1540 1541 return num_pkts; 1542 } 1543 1544 1545 static void 1546 vmxnet3_rq_cleanup(struct vmxnet3_rx_queue *rq, 1547 struct vmxnet3_adapter *adapter) 1548 { 1549 u32 i, ring_idx; 1550 struct Vmxnet3_RxDesc *rxd; 1551 1552 for (ring_idx = 0; ring_idx < 2; ring_idx++) { 1553 for (i = 0; i < rq->rx_ring[ring_idx].size; i++) { 1554 #ifdef __BIG_ENDIAN_BITFIELD 1555 struct Vmxnet3_RxDesc rxDesc; 1556 #endif 1557 vmxnet3_getRxDesc(rxd, 1558 &rq->rx_ring[ring_idx].base[i].rxd, &rxDesc); 1559 1560 if (rxd->btype == VMXNET3_RXD_BTYPE_HEAD && 1561 rq->buf_info[ring_idx][i].skb) { 1562 dma_unmap_single(&adapter->pdev->dev, rxd->addr, 1563 rxd->len, PCI_DMA_FROMDEVICE); 1564 dev_kfree_skb(rq->buf_info[ring_idx][i].skb); 1565 rq->buf_info[ring_idx][i].skb = NULL; 1566 } else if (rxd->btype == VMXNET3_RXD_BTYPE_BODY && 1567 rq->buf_info[ring_idx][i].page) { 1568 dma_unmap_page(&adapter->pdev->dev, rxd->addr, 1569 rxd->len, PCI_DMA_FROMDEVICE); 1570 put_page(rq->buf_info[ring_idx][i].page); 1571 rq->buf_info[ring_idx][i].page = NULL; 1572 } 1573 } 1574 1575 rq->rx_ring[ring_idx].gen = VMXNET3_INIT_GEN; 1576 rq->rx_ring[ring_idx].next2fill = 1577 rq->rx_ring[ring_idx].next2comp = 0; 1578 } 1579 1580 rq->comp_ring.gen = VMXNET3_INIT_GEN; 1581 rq->comp_ring.next2proc = 0; 1582 } 1583 1584 1585 static void 1586 vmxnet3_rq_cleanup_all(struct vmxnet3_adapter *adapter) 1587 { 1588 int i; 1589 1590 for (i = 0; i < adapter->num_rx_queues; i++) 1591 vmxnet3_rq_cleanup(&adapter->rx_queue[i], adapter); 1592 } 1593 1594 1595 static void vmxnet3_rq_destroy(struct vmxnet3_rx_queue *rq, 1596 struct vmxnet3_adapter *adapter) 1597 { 1598 int i; 1599 int j; 1600 1601 /* all rx buffers must have already been freed */ 1602 for (i = 0; i < 2; i++) { 1603 if (rq->buf_info[i]) { 1604 for (j = 0; j < rq->rx_ring[i].size; j++) 1605 BUG_ON(rq->buf_info[i][j].page != NULL); 1606 } 1607 } 1608 1609 1610 for (i = 0; i < 2; i++) { 1611 if (rq->rx_ring[i].base) { 1612 dma_free_coherent(&adapter->pdev->dev, 1613 rq->rx_ring[i].size 1614 * sizeof(struct Vmxnet3_RxDesc), 1615 rq->rx_ring[i].base, 1616 rq->rx_ring[i].basePA); 1617 rq->rx_ring[i].base = NULL; 1618 } 1619 rq->buf_info[i] = NULL; 1620 } 1621 1622 if (rq->data_ring.base) { 1623 dma_free_coherent(&adapter->pdev->dev, 1624 rq->rx_ring[0].size * rq->data_ring.desc_size, 1625 rq->data_ring.base, rq->data_ring.basePA); 1626 rq->data_ring.base = NULL; 1627 } 1628 1629 if (rq->comp_ring.base) { 1630 dma_free_coherent(&adapter->pdev->dev, rq->comp_ring.size 1631 * sizeof(struct Vmxnet3_RxCompDesc), 1632 rq->comp_ring.base, rq->comp_ring.basePA); 1633 rq->comp_ring.base = NULL; 1634 } 1635 1636 if (rq->buf_info[0]) { 1637 size_t sz = sizeof(struct vmxnet3_rx_buf_info) * 1638 (rq->rx_ring[0].size + rq->rx_ring[1].size); 1639 dma_free_coherent(&adapter->pdev->dev, sz, rq->buf_info[0], 1640 rq->buf_info_pa); 1641 } 1642 } 1643 1644 static void 1645 vmxnet3_rq_destroy_all_rxdataring(struct vmxnet3_adapter *adapter) 1646 { 1647 int i; 1648 1649 for (i = 0; i < adapter->num_rx_queues; i++) { 1650 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i]; 1651 1652 if (rq->data_ring.base) { 1653 dma_free_coherent(&adapter->pdev->dev, 1654 (rq->rx_ring[0].size * 1655 rq->data_ring.desc_size), 1656 rq->data_ring.base, 1657 rq->data_ring.basePA); 1658 rq->data_ring.base = NULL; 1659 rq->data_ring.desc_size = 0; 1660 } 1661 } 1662 } 1663 1664 static int 1665 vmxnet3_rq_init(struct vmxnet3_rx_queue *rq, 1666 struct vmxnet3_adapter *adapter) 1667 { 1668 int i; 1669 1670 /* initialize buf_info */ 1671 for (i = 0; i < rq->rx_ring[0].size; i++) { 1672 1673 /* 1st buf for a pkt is skbuff */ 1674 if (i % adapter->rx_buf_per_pkt == 0) { 1675 rq->buf_info[0][i].buf_type = VMXNET3_RX_BUF_SKB; 1676 rq->buf_info[0][i].len = adapter->skb_buf_size; 1677 } else { /* subsequent bufs for a pkt is frag */ 1678 rq->buf_info[0][i].buf_type = VMXNET3_RX_BUF_PAGE; 1679 rq->buf_info[0][i].len = PAGE_SIZE; 1680 } 1681 } 1682 for (i = 0; i < rq->rx_ring[1].size; i++) { 1683 rq->buf_info[1][i].buf_type = VMXNET3_RX_BUF_PAGE; 1684 rq->buf_info[1][i].len = PAGE_SIZE; 1685 } 1686 1687 /* reset internal state and allocate buffers for both rings */ 1688 for (i = 0; i < 2; i++) { 1689 rq->rx_ring[i].next2fill = rq->rx_ring[i].next2comp = 0; 1690 1691 memset(rq->rx_ring[i].base, 0, rq->rx_ring[i].size * 1692 sizeof(struct Vmxnet3_RxDesc)); 1693 rq->rx_ring[i].gen = VMXNET3_INIT_GEN; 1694 } 1695 if (vmxnet3_rq_alloc_rx_buf(rq, 0, rq->rx_ring[0].size - 1, 1696 adapter) == 0) { 1697 /* at least has 1 rx buffer for the 1st ring */ 1698 return -ENOMEM; 1699 } 1700 vmxnet3_rq_alloc_rx_buf(rq, 1, rq->rx_ring[1].size - 1, adapter); 1701 1702 /* reset the comp ring */ 1703 rq->comp_ring.next2proc = 0; 1704 memset(rq->comp_ring.base, 0, rq->comp_ring.size * 1705 sizeof(struct Vmxnet3_RxCompDesc)); 1706 rq->comp_ring.gen = VMXNET3_INIT_GEN; 1707 1708 /* reset rxctx */ 1709 rq->rx_ctx.skb = NULL; 1710 1711 /* stats are not reset */ 1712 return 0; 1713 } 1714 1715 1716 static int 1717 vmxnet3_rq_init_all(struct vmxnet3_adapter *adapter) 1718 { 1719 int i, err = 0; 1720 1721 for (i = 0; i < adapter->num_rx_queues; i++) { 1722 err = vmxnet3_rq_init(&adapter->rx_queue[i], adapter); 1723 if (unlikely(err)) { 1724 dev_err(&adapter->netdev->dev, "%s: failed to " 1725 "initialize rx queue%i\n", 1726 adapter->netdev->name, i); 1727 break; 1728 } 1729 } 1730 return err; 1731 1732 } 1733 1734 1735 static int 1736 vmxnet3_rq_create(struct vmxnet3_rx_queue *rq, struct vmxnet3_adapter *adapter) 1737 { 1738 int i; 1739 size_t sz; 1740 struct vmxnet3_rx_buf_info *bi; 1741 1742 for (i = 0; i < 2; i++) { 1743 1744 sz = rq->rx_ring[i].size * sizeof(struct Vmxnet3_RxDesc); 1745 rq->rx_ring[i].base = dma_alloc_coherent( 1746 &adapter->pdev->dev, sz, 1747 &rq->rx_ring[i].basePA, 1748 GFP_KERNEL); 1749 if (!rq->rx_ring[i].base) { 1750 netdev_err(adapter->netdev, 1751 "failed to allocate rx ring %d\n", i); 1752 goto err; 1753 } 1754 } 1755 1756 if ((adapter->rxdataring_enabled) && (rq->data_ring.desc_size != 0)) { 1757 sz = rq->rx_ring[0].size * rq->data_ring.desc_size; 1758 rq->data_ring.base = 1759 dma_alloc_coherent(&adapter->pdev->dev, sz, 1760 &rq->data_ring.basePA, 1761 GFP_KERNEL); 1762 if (!rq->data_ring.base) { 1763 netdev_err(adapter->netdev, 1764 "rx data ring will be disabled\n"); 1765 adapter->rxdataring_enabled = false; 1766 } 1767 } else { 1768 rq->data_ring.base = NULL; 1769 rq->data_ring.desc_size = 0; 1770 } 1771 1772 sz = rq->comp_ring.size * sizeof(struct Vmxnet3_RxCompDesc); 1773 rq->comp_ring.base = dma_alloc_coherent(&adapter->pdev->dev, sz, 1774 &rq->comp_ring.basePA, 1775 GFP_KERNEL); 1776 if (!rq->comp_ring.base) { 1777 netdev_err(adapter->netdev, "failed to allocate rx comp ring\n"); 1778 goto err; 1779 } 1780 1781 sz = sizeof(struct vmxnet3_rx_buf_info) * (rq->rx_ring[0].size + 1782 rq->rx_ring[1].size); 1783 bi = dma_zalloc_coherent(&adapter->pdev->dev, sz, &rq->buf_info_pa, 1784 GFP_KERNEL); 1785 if (!bi) 1786 goto err; 1787 1788 rq->buf_info[0] = bi; 1789 rq->buf_info[1] = bi + rq->rx_ring[0].size; 1790 1791 return 0; 1792 1793 err: 1794 vmxnet3_rq_destroy(rq, adapter); 1795 return -ENOMEM; 1796 } 1797 1798 1799 static int 1800 vmxnet3_rq_create_all(struct vmxnet3_adapter *adapter) 1801 { 1802 int i, err = 0; 1803 1804 adapter->rxdataring_enabled = VMXNET3_VERSION_GE_3(adapter); 1805 1806 for (i = 0; i < adapter->num_rx_queues; i++) { 1807 err = vmxnet3_rq_create(&adapter->rx_queue[i], adapter); 1808 if (unlikely(err)) { 1809 dev_err(&adapter->netdev->dev, 1810 "%s: failed to create rx queue%i\n", 1811 adapter->netdev->name, i); 1812 goto err_out; 1813 } 1814 } 1815 1816 if (!adapter->rxdataring_enabled) 1817 vmxnet3_rq_destroy_all_rxdataring(adapter); 1818 1819 return err; 1820 err_out: 1821 vmxnet3_rq_destroy_all(adapter); 1822 return err; 1823 1824 } 1825 1826 /* Multiple queue aware polling function for tx and rx */ 1827 1828 static int 1829 vmxnet3_do_poll(struct vmxnet3_adapter *adapter, int budget) 1830 { 1831 int rcd_done = 0, i; 1832 if (unlikely(adapter->shared->ecr)) 1833 vmxnet3_process_events(adapter); 1834 for (i = 0; i < adapter->num_tx_queues; i++) 1835 vmxnet3_tq_tx_complete(&adapter->tx_queue[i], adapter); 1836 1837 for (i = 0; i < adapter->num_rx_queues; i++) 1838 rcd_done += vmxnet3_rq_rx_complete(&adapter->rx_queue[i], 1839 adapter, budget); 1840 return rcd_done; 1841 } 1842 1843 1844 static int 1845 vmxnet3_poll(struct napi_struct *napi, int budget) 1846 { 1847 struct vmxnet3_rx_queue *rx_queue = container_of(napi, 1848 struct vmxnet3_rx_queue, napi); 1849 int rxd_done; 1850 1851 rxd_done = vmxnet3_do_poll(rx_queue->adapter, budget); 1852 1853 if (rxd_done < budget) { 1854 napi_complete(napi); 1855 vmxnet3_enable_all_intrs(rx_queue->adapter); 1856 } 1857 return rxd_done; 1858 } 1859 1860 /* 1861 * NAPI polling function for MSI-X mode with multiple Rx queues 1862 * Returns the # of the NAPI credit consumed (# of rx descriptors processed) 1863 */ 1864 1865 static int 1866 vmxnet3_poll_rx_only(struct napi_struct *napi, int budget) 1867 { 1868 struct vmxnet3_rx_queue *rq = container_of(napi, 1869 struct vmxnet3_rx_queue, napi); 1870 struct vmxnet3_adapter *adapter = rq->adapter; 1871 int rxd_done; 1872 1873 /* When sharing interrupt with corresponding tx queue, process 1874 * tx completions in that queue as well 1875 */ 1876 if (adapter->share_intr == VMXNET3_INTR_BUDDYSHARE) { 1877 struct vmxnet3_tx_queue *tq = 1878 &adapter->tx_queue[rq - adapter->rx_queue]; 1879 vmxnet3_tq_tx_complete(tq, adapter); 1880 } 1881 1882 rxd_done = vmxnet3_rq_rx_complete(rq, adapter, budget); 1883 1884 if (rxd_done < budget) { 1885 napi_complete(napi); 1886 vmxnet3_enable_intr(adapter, rq->comp_ring.intr_idx); 1887 } 1888 return rxd_done; 1889 } 1890 1891 1892 #ifdef CONFIG_PCI_MSI 1893 1894 /* 1895 * Handle completion interrupts on tx queues 1896 * Returns whether or not the intr is handled 1897 */ 1898 1899 static irqreturn_t 1900 vmxnet3_msix_tx(int irq, void *data) 1901 { 1902 struct vmxnet3_tx_queue *tq = data; 1903 struct vmxnet3_adapter *adapter = tq->adapter; 1904 1905 if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE) 1906 vmxnet3_disable_intr(adapter, tq->comp_ring.intr_idx); 1907 1908 /* Handle the case where only one irq is allocate for all tx queues */ 1909 if (adapter->share_intr == VMXNET3_INTR_TXSHARE) { 1910 int i; 1911 for (i = 0; i < adapter->num_tx_queues; i++) { 1912 struct vmxnet3_tx_queue *txq = &adapter->tx_queue[i]; 1913 vmxnet3_tq_tx_complete(txq, adapter); 1914 } 1915 } else { 1916 vmxnet3_tq_tx_complete(tq, adapter); 1917 } 1918 vmxnet3_enable_intr(adapter, tq->comp_ring.intr_idx); 1919 1920 return IRQ_HANDLED; 1921 } 1922 1923 1924 /* 1925 * Handle completion interrupts on rx queues. Returns whether or not the 1926 * intr is handled 1927 */ 1928 1929 static irqreturn_t 1930 vmxnet3_msix_rx(int irq, void *data) 1931 { 1932 struct vmxnet3_rx_queue *rq = data; 1933 struct vmxnet3_adapter *adapter = rq->adapter; 1934 1935 /* disable intr if needed */ 1936 if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE) 1937 vmxnet3_disable_intr(adapter, rq->comp_ring.intr_idx); 1938 napi_schedule(&rq->napi); 1939 1940 return IRQ_HANDLED; 1941 } 1942 1943 /* 1944 *---------------------------------------------------------------------------- 1945 * 1946 * vmxnet3_msix_event -- 1947 * 1948 * vmxnet3 msix event intr handler 1949 * 1950 * Result: 1951 * whether or not the intr is handled 1952 * 1953 *---------------------------------------------------------------------------- 1954 */ 1955 1956 static irqreturn_t 1957 vmxnet3_msix_event(int irq, void *data) 1958 { 1959 struct net_device *dev = data; 1960 struct vmxnet3_adapter *adapter = netdev_priv(dev); 1961 1962 /* disable intr if needed */ 1963 if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE) 1964 vmxnet3_disable_intr(adapter, adapter->intr.event_intr_idx); 1965 1966 if (adapter->shared->ecr) 1967 vmxnet3_process_events(adapter); 1968 1969 vmxnet3_enable_intr(adapter, adapter->intr.event_intr_idx); 1970 1971 return IRQ_HANDLED; 1972 } 1973 1974 #endif /* CONFIG_PCI_MSI */ 1975 1976 1977 /* Interrupt handler for vmxnet3 */ 1978 static irqreturn_t 1979 vmxnet3_intr(int irq, void *dev_id) 1980 { 1981 struct net_device *dev = dev_id; 1982 struct vmxnet3_adapter *adapter = netdev_priv(dev); 1983 1984 if (adapter->intr.type == VMXNET3_IT_INTX) { 1985 u32 icr = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_ICR); 1986 if (unlikely(icr == 0)) 1987 /* not ours */ 1988 return IRQ_NONE; 1989 } 1990 1991 1992 /* disable intr if needed */ 1993 if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE) 1994 vmxnet3_disable_all_intrs(adapter); 1995 1996 napi_schedule(&adapter->rx_queue[0].napi); 1997 1998 return IRQ_HANDLED; 1999 } 2000 2001 #ifdef CONFIG_NET_POLL_CONTROLLER 2002 2003 /* netpoll callback. */ 2004 static void 2005 vmxnet3_netpoll(struct net_device *netdev) 2006 { 2007 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 2008 2009 switch (adapter->intr.type) { 2010 #ifdef CONFIG_PCI_MSI 2011 case VMXNET3_IT_MSIX: { 2012 int i; 2013 for (i = 0; i < adapter->num_rx_queues; i++) 2014 vmxnet3_msix_rx(0, &adapter->rx_queue[i]); 2015 break; 2016 } 2017 #endif 2018 case VMXNET3_IT_MSI: 2019 default: 2020 vmxnet3_intr(0, adapter->netdev); 2021 break; 2022 } 2023 2024 } 2025 #endif /* CONFIG_NET_POLL_CONTROLLER */ 2026 2027 static int 2028 vmxnet3_request_irqs(struct vmxnet3_adapter *adapter) 2029 { 2030 struct vmxnet3_intr *intr = &adapter->intr; 2031 int err = 0, i; 2032 int vector = 0; 2033 2034 #ifdef CONFIG_PCI_MSI 2035 if (adapter->intr.type == VMXNET3_IT_MSIX) { 2036 for (i = 0; i < adapter->num_tx_queues; i++) { 2037 if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE) { 2038 sprintf(adapter->tx_queue[i].name, "%s-tx-%d", 2039 adapter->netdev->name, vector); 2040 err = request_irq( 2041 intr->msix_entries[vector].vector, 2042 vmxnet3_msix_tx, 0, 2043 adapter->tx_queue[i].name, 2044 &adapter->tx_queue[i]); 2045 } else { 2046 sprintf(adapter->tx_queue[i].name, "%s-rxtx-%d", 2047 adapter->netdev->name, vector); 2048 } 2049 if (err) { 2050 dev_err(&adapter->netdev->dev, 2051 "Failed to request irq for MSIX, %s, " 2052 "error %d\n", 2053 adapter->tx_queue[i].name, err); 2054 return err; 2055 } 2056 2057 /* Handle the case where only 1 MSIx was allocated for 2058 * all tx queues */ 2059 if (adapter->share_intr == VMXNET3_INTR_TXSHARE) { 2060 for (; i < adapter->num_tx_queues; i++) 2061 adapter->tx_queue[i].comp_ring.intr_idx 2062 = vector; 2063 vector++; 2064 break; 2065 } else { 2066 adapter->tx_queue[i].comp_ring.intr_idx 2067 = vector++; 2068 } 2069 } 2070 if (adapter->share_intr == VMXNET3_INTR_BUDDYSHARE) 2071 vector = 0; 2072 2073 for (i = 0; i < adapter->num_rx_queues; i++) { 2074 if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE) 2075 sprintf(adapter->rx_queue[i].name, "%s-rx-%d", 2076 adapter->netdev->name, vector); 2077 else 2078 sprintf(adapter->rx_queue[i].name, "%s-rxtx-%d", 2079 adapter->netdev->name, vector); 2080 err = request_irq(intr->msix_entries[vector].vector, 2081 vmxnet3_msix_rx, 0, 2082 adapter->rx_queue[i].name, 2083 &(adapter->rx_queue[i])); 2084 if (err) { 2085 netdev_err(adapter->netdev, 2086 "Failed to request irq for MSIX, " 2087 "%s, error %d\n", 2088 adapter->rx_queue[i].name, err); 2089 return err; 2090 } 2091 2092 adapter->rx_queue[i].comp_ring.intr_idx = vector++; 2093 } 2094 2095 sprintf(intr->event_msi_vector_name, "%s-event-%d", 2096 adapter->netdev->name, vector); 2097 err = request_irq(intr->msix_entries[vector].vector, 2098 vmxnet3_msix_event, 0, 2099 intr->event_msi_vector_name, adapter->netdev); 2100 intr->event_intr_idx = vector; 2101 2102 } else if (intr->type == VMXNET3_IT_MSI) { 2103 adapter->num_rx_queues = 1; 2104 err = request_irq(adapter->pdev->irq, vmxnet3_intr, 0, 2105 adapter->netdev->name, adapter->netdev); 2106 } else { 2107 #endif 2108 adapter->num_rx_queues = 1; 2109 err = request_irq(adapter->pdev->irq, vmxnet3_intr, 2110 IRQF_SHARED, adapter->netdev->name, 2111 adapter->netdev); 2112 #ifdef CONFIG_PCI_MSI 2113 } 2114 #endif 2115 intr->num_intrs = vector + 1; 2116 if (err) { 2117 netdev_err(adapter->netdev, 2118 "Failed to request irq (intr type:%d), error %d\n", 2119 intr->type, err); 2120 } else { 2121 /* Number of rx queues will not change after this */ 2122 for (i = 0; i < adapter->num_rx_queues; i++) { 2123 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i]; 2124 rq->qid = i; 2125 rq->qid2 = i + adapter->num_rx_queues; 2126 rq->dataRingQid = i + 2 * adapter->num_rx_queues; 2127 } 2128 2129 /* init our intr settings */ 2130 for (i = 0; i < intr->num_intrs; i++) 2131 intr->mod_levels[i] = UPT1_IML_ADAPTIVE; 2132 if (adapter->intr.type != VMXNET3_IT_MSIX) { 2133 adapter->intr.event_intr_idx = 0; 2134 for (i = 0; i < adapter->num_tx_queues; i++) 2135 adapter->tx_queue[i].comp_ring.intr_idx = 0; 2136 adapter->rx_queue[0].comp_ring.intr_idx = 0; 2137 } 2138 2139 netdev_info(adapter->netdev, 2140 "intr type %u, mode %u, %u vectors allocated\n", 2141 intr->type, intr->mask_mode, intr->num_intrs); 2142 } 2143 2144 return err; 2145 } 2146 2147 2148 static void 2149 vmxnet3_free_irqs(struct vmxnet3_adapter *adapter) 2150 { 2151 struct vmxnet3_intr *intr = &adapter->intr; 2152 BUG_ON(intr->type == VMXNET3_IT_AUTO || intr->num_intrs <= 0); 2153 2154 switch (intr->type) { 2155 #ifdef CONFIG_PCI_MSI 2156 case VMXNET3_IT_MSIX: 2157 { 2158 int i, vector = 0; 2159 2160 if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE) { 2161 for (i = 0; i < adapter->num_tx_queues; i++) { 2162 free_irq(intr->msix_entries[vector++].vector, 2163 &(adapter->tx_queue[i])); 2164 if (adapter->share_intr == VMXNET3_INTR_TXSHARE) 2165 break; 2166 } 2167 } 2168 2169 for (i = 0; i < adapter->num_rx_queues; i++) { 2170 free_irq(intr->msix_entries[vector++].vector, 2171 &(adapter->rx_queue[i])); 2172 } 2173 2174 free_irq(intr->msix_entries[vector].vector, 2175 adapter->netdev); 2176 BUG_ON(vector >= intr->num_intrs); 2177 break; 2178 } 2179 #endif 2180 case VMXNET3_IT_MSI: 2181 free_irq(adapter->pdev->irq, adapter->netdev); 2182 break; 2183 case VMXNET3_IT_INTX: 2184 free_irq(adapter->pdev->irq, adapter->netdev); 2185 break; 2186 default: 2187 BUG(); 2188 } 2189 } 2190 2191 2192 static void 2193 vmxnet3_restore_vlan(struct vmxnet3_adapter *adapter) 2194 { 2195 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable; 2196 u16 vid; 2197 2198 /* allow untagged pkts */ 2199 VMXNET3_SET_VFTABLE_ENTRY(vfTable, 0); 2200 2201 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID) 2202 VMXNET3_SET_VFTABLE_ENTRY(vfTable, vid); 2203 } 2204 2205 2206 static int 2207 vmxnet3_vlan_rx_add_vid(struct net_device *netdev, __be16 proto, u16 vid) 2208 { 2209 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 2210 2211 if (!(netdev->flags & IFF_PROMISC)) { 2212 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable; 2213 unsigned long flags; 2214 2215 VMXNET3_SET_VFTABLE_ENTRY(vfTable, vid); 2216 spin_lock_irqsave(&adapter->cmd_lock, flags); 2217 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 2218 VMXNET3_CMD_UPDATE_VLAN_FILTERS); 2219 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 2220 } 2221 2222 set_bit(vid, adapter->active_vlans); 2223 2224 return 0; 2225 } 2226 2227 2228 static int 2229 vmxnet3_vlan_rx_kill_vid(struct net_device *netdev, __be16 proto, u16 vid) 2230 { 2231 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 2232 2233 if (!(netdev->flags & IFF_PROMISC)) { 2234 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable; 2235 unsigned long flags; 2236 2237 VMXNET3_CLEAR_VFTABLE_ENTRY(vfTable, vid); 2238 spin_lock_irqsave(&adapter->cmd_lock, flags); 2239 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 2240 VMXNET3_CMD_UPDATE_VLAN_FILTERS); 2241 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 2242 } 2243 2244 clear_bit(vid, adapter->active_vlans); 2245 2246 return 0; 2247 } 2248 2249 2250 static u8 * 2251 vmxnet3_copy_mc(struct net_device *netdev) 2252 { 2253 u8 *buf = NULL; 2254 u32 sz = netdev_mc_count(netdev) * ETH_ALEN; 2255 2256 /* struct Vmxnet3_RxFilterConf.mfTableLen is u16. */ 2257 if (sz <= 0xffff) { 2258 /* We may be called with BH disabled */ 2259 buf = kmalloc(sz, GFP_ATOMIC); 2260 if (buf) { 2261 struct netdev_hw_addr *ha; 2262 int i = 0; 2263 2264 netdev_for_each_mc_addr(ha, netdev) 2265 memcpy(buf + i++ * ETH_ALEN, ha->addr, 2266 ETH_ALEN); 2267 } 2268 } 2269 return buf; 2270 } 2271 2272 2273 static void 2274 vmxnet3_set_mc(struct net_device *netdev) 2275 { 2276 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 2277 unsigned long flags; 2278 struct Vmxnet3_RxFilterConf *rxConf = 2279 &adapter->shared->devRead.rxFilterConf; 2280 u8 *new_table = NULL; 2281 dma_addr_t new_table_pa = 0; 2282 u32 new_mode = VMXNET3_RXM_UCAST; 2283 2284 if (netdev->flags & IFF_PROMISC) { 2285 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable; 2286 memset(vfTable, 0, VMXNET3_VFT_SIZE * sizeof(*vfTable)); 2287 2288 new_mode |= VMXNET3_RXM_PROMISC; 2289 } else { 2290 vmxnet3_restore_vlan(adapter); 2291 } 2292 2293 if (netdev->flags & IFF_BROADCAST) 2294 new_mode |= VMXNET3_RXM_BCAST; 2295 2296 if (netdev->flags & IFF_ALLMULTI) 2297 new_mode |= VMXNET3_RXM_ALL_MULTI; 2298 else 2299 if (!netdev_mc_empty(netdev)) { 2300 new_table = vmxnet3_copy_mc(netdev); 2301 if (new_table) { 2302 size_t sz = netdev_mc_count(netdev) * ETH_ALEN; 2303 2304 rxConf->mfTableLen = cpu_to_le16(sz); 2305 new_table_pa = dma_map_single( 2306 &adapter->pdev->dev, 2307 new_table, 2308 sz, 2309 PCI_DMA_TODEVICE); 2310 } 2311 2312 if (!dma_mapping_error(&adapter->pdev->dev, 2313 new_table_pa)) { 2314 new_mode |= VMXNET3_RXM_MCAST; 2315 rxConf->mfTablePA = cpu_to_le64(new_table_pa); 2316 } else { 2317 netdev_info(netdev, 2318 "failed to copy mcast list, setting ALL_MULTI\n"); 2319 new_mode |= VMXNET3_RXM_ALL_MULTI; 2320 } 2321 } 2322 2323 if (!(new_mode & VMXNET3_RXM_MCAST)) { 2324 rxConf->mfTableLen = 0; 2325 rxConf->mfTablePA = 0; 2326 } 2327 2328 spin_lock_irqsave(&adapter->cmd_lock, flags); 2329 if (new_mode != rxConf->rxMode) { 2330 rxConf->rxMode = cpu_to_le32(new_mode); 2331 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 2332 VMXNET3_CMD_UPDATE_RX_MODE); 2333 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 2334 VMXNET3_CMD_UPDATE_VLAN_FILTERS); 2335 } 2336 2337 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 2338 VMXNET3_CMD_UPDATE_MAC_FILTERS); 2339 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 2340 2341 if (new_table_pa) 2342 dma_unmap_single(&adapter->pdev->dev, new_table_pa, 2343 rxConf->mfTableLen, PCI_DMA_TODEVICE); 2344 kfree(new_table); 2345 } 2346 2347 void 2348 vmxnet3_rq_destroy_all(struct vmxnet3_adapter *adapter) 2349 { 2350 int i; 2351 2352 for (i = 0; i < adapter->num_rx_queues; i++) 2353 vmxnet3_rq_destroy(&adapter->rx_queue[i], adapter); 2354 } 2355 2356 2357 /* 2358 * Set up driver_shared based on settings in adapter. 2359 */ 2360 2361 static void 2362 vmxnet3_setup_driver_shared(struct vmxnet3_adapter *adapter) 2363 { 2364 struct Vmxnet3_DriverShared *shared = adapter->shared; 2365 struct Vmxnet3_DSDevRead *devRead = &shared->devRead; 2366 struct Vmxnet3_TxQueueConf *tqc; 2367 struct Vmxnet3_RxQueueConf *rqc; 2368 int i; 2369 2370 memset(shared, 0, sizeof(*shared)); 2371 2372 /* driver settings */ 2373 shared->magic = cpu_to_le32(VMXNET3_REV1_MAGIC); 2374 devRead->misc.driverInfo.version = cpu_to_le32( 2375 VMXNET3_DRIVER_VERSION_NUM); 2376 devRead->misc.driverInfo.gos.gosBits = (sizeof(void *) == 4 ? 2377 VMXNET3_GOS_BITS_32 : VMXNET3_GOS_BITS_64); 2378 devRead->misc.driverInfo.gos.gosType = VMXNET3_GOS_TYPE_LINUX; 2379 *((u32 *)&devRead->misc.driverInfo.gos) = cpu_to_le32( 2380 *((u32 *)&devRead->misc.driverInfo.gos)); 2381 devRead->misc.driverInfo.vmxnet3RevSpt = cpu_to_le32(1); 2382 devRead->misc.driverInfo.uptVerSpt = cpu_to_le32(1); 2383 2384 devRead->misc.ddPA = cpu_to_le64(adapter->adapter_pa); 2385 devRead->misc.ddLen = cpu_to_le32(sizeof(struct vmxnet3_adapter)); 2386 2387 /* set up feature flags */ 2388 if (adapter->netdev->features & NETIF_F_RXCSUM) 2389 devRead->misc.uptFeatures |= UPT1_F_RXCSUM; 2390 2391 if (adapter->netdev->features & NETIF_F_LRO) { 2392 devRead->misc.uptFeatures |= UPT1_F_LRO; 2393 devRead->misc.maxNumRxSG = cpu_to_le16(1 + MAX_SKB_FRAGS); 2394 } 2395 if (adapter->netdev->features & NETIF_F_HW_VLAN_CTAG_RX) 2396 devRead->misc.uptFeatures |= UPT1_F_RXVLAN; 2397 2398 devRead->misc.mtu = cpu_to_le32(adapter->netdev->mtu); 2399 devRead->misc.queueDescPA = cpu_to_le64(adapter->queue_desc_pa); 2400 devRead->misc.queueDescLen = cpu_to_le32( 2401 adapter->num_tx_queues * sizeof(struct Vmxnet3_TxQueueDesc) + 2402 adapter->num_rx_queues * sizeof(struct Vmxnet3_RxQueueDesc)); 2403 2404 /* tx queue settings */ 2405 devRead->misc.numTxQueues = adapter->num_tx_queues; 2406 for (i = 0; i < adapter->num_tx_queues; i++) { 2407 struct vmxnet3_tx_queue *tq = &adapter->tx_queue[i]; 2408 BUG_ON(adapter->tx_queue[i].tx_ring.base == NULL); 2409 tqc = &adapter->tqd_start[i].conf; 2410 tqc->txRingBasePA = cpu_to_le64(tq->tx_ring.basePA); 2411 tqc->dataRingBasePA = cpu_to_le64(tq->data_ring.basePA); 2412 tqc->compRingBasePA = cpu_to_le64(tq->comp_ring.basePA); 2413 tqc->ddPA = cpu_to_le64(tq->buf_info_pa); 2414 tqc->txRingSize = cpu_to_le32(tq->tx_ring.size); 2415 tqc->dataRingSize = cpu_to_le32(tq->data_ring.size); 2416 tqc->txDataRingDescSize = cpu_to_le32(tq->txdata_desc_size); 2417 tqc->compRingSize = cpu_to_le32(tq->comp_ring.size); 2418 tqc->ddLen = cpu_to_le32( 2419 sizeof(struct vmxnet3_tx_buf_info) * 2420 tqc->txRingSize); 2421 tqc->intrIdx = tq->comp_ring.intr_idx; 2422 } 2423 2424 /* rx queue settings */ 2425 devRead->misc.numRxQueues = adapter->num_rx_queues; 2426 for (i = 0; i < adapter->num_rx_queues; i++) { 2427 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i]; 2428 rqc = &adapter->rqd_start[i].conf; 2429 rqc->rxRingBasePA[0] = cpu_to_le64(rq->rx_ring[0].basePA); 2430 rqc->rxRingBasePA[1] = cpu_to_le64(rq->rx_ring[1].basePA); 2431 rqc->compRingBasePA = cpu_to_le64(rq->comp_ring.basePA); 2432 rqc->ddPA = cpu_to_le64(rq->buf_info_pa); 2433 rqc->rxRingSize[0] = cpu_to_le32(rq->rx_ring[0].size); 2434 rqc->rxRingSize[1] = cpu_to_le32(rq->rx_ring[1].size); 2435 rqc->compRingSize = cpu_to_le32(rq->comp_ring.size); 2436 rqc->ddLen = cpu_to_le32( 2437 sizeof(struct vmxnet3_rx_buf_info) * 2438 (rqc->rxRingSize[0] + 2439 rqc->rxRingSize[1])); 2440 rqc->intrIdx = rq->comp_ring.intr_idx; 2441 if (VMXNET3_VERSION_GE_3(adapter)) { 2442 rqc->rxDataRingBasePA = 2443 cpu_to_le64(rq->data_ring.basePA); 2444 rqc->rxDataRingDescSize = 2445 cpu_to_le16(rq->data_ring.desc_size); 2446 } 2447 } 2448 2449 #ifdef VMXNET3_RSS 2450 memset(adapter->rss_conf, 0, sizeof(*adapter->rss_conf)); 2451 2452 if (adapter->rss) { 2453 struct UPT1_RSSConf *rssConf = adapter->rss_conf; 2454 2455 devRead->misc.uptFeatures |= UPT1_F_RSS; 2456 devRead->misc.numRxQueues = adapter->num_rx_queues; 2457 rssConf->hashType = UPT1_RSS_HASH_TYPE_TCP_IPV4 | 2458 UPT1_RSS_HASH_TYPE_IPV4 | 2459 UPT1_RSS_HASH_TYPE_TCP_IPV6 | 2460 UPT1_RSS_HASH_TYPE_IPV6; 2461 rssConf->hashFunc = UPT1_RSS_HASH_FUNC_TOEPLITZ; 2462 rssConf->hashKeySize = UPT1_RSS_MAX_KEY_SIZE; 2463 rssConf->indTableSize = VMXNET3_RSS_IND_TABLE_SIZE; 2464 netdev_rss_key_fill(rssConf->hashKey, sizeof(rssConf->hashKey)); 2465 2466 for (i = 0; i < rssConf->indTableSize; i++) 2467 rssConf->indTable[i] = ethtool_rxfh_indir_default( 2468 i, adapter->num_rx_queues); 2469 2470 devRead->rssConfDesc.confVer = 1; 2471 devRead->rssConfDesc.confLen = cpu_to_le32(sizeof(*rssConf)); 2472 devRead->rssConfDesc.confPA = 2473 cpu_to_le64(adapter->rss_conf_pa); 2474 } 2475 2476 #endif /* VMXNET3_RSS */ 2477 2478 /* intr settings */ 2479 devRead->intrConf.autoMask = adapter->intr.mask_mode == 2480 VMXNET3_IMM_AUTO; 2481 devRead->intrConf.numIntrs = adapter->intr.num_intrs; 2482 for (i = 0; i < adapter->intr.num_intrs; i++) 2483 devRead->intrConf.modLevels[i] = adapter->intr.mod_levels[i]; 2484 2485 devRead->intrConf.eventIntrIdx = adapter->intr.event_intr_idx; 2486 devRead->intrConf.intrCtrl |= cpu_to_le32(VMXNET3_IC_DISABLE_ALL); 2487 2488 /* rx filter settings */ 2489 devRead->rxFilterConf.rxMode = 0; 2490 vmxnet3_restore_vlan(adapter); 2491 vmxnet3_write_mac_addr(adapter, adapter->netdev->dev_addr); 2492 2493 /* the rest are already zeroed */ 2494 } 2495 2496 static void 2497 vmxnet3_init_coalesce(struct vmxnet3_adapter *adapter) 2498 { 2499 struct Vmxnet3_DriverShared *shared = adapter->shared; 2500 union Vmxnet3_CmdInfo *cmdInfo = &shared->cu.cmdInfo; 2501 unsigned long flags; 2502 2503 if (!VMXNET3_VERSION_GE_3(adapter)) 2504 return; 2505 2506 spin_lock_irqsave(&adapter->cmd_lock, flags); 2507 cmdInfo->varConf.confVer = 1; 2508 cmdInfo->varConf.confLen = 2509 cpu_to_le32(sizeof(*adapter->coal_conf)); 2510 cmdInfo->varConf.confPA = cpu_to_le64(adapter->coal_conf_pa); 2511 2512 if (adapter->default_coal_mode) { 2513 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 2514 VMXNET3_CMD_GET_COALESCE); 2515 } else { 2516 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 2517 VMXNET3_CMD_SET_COALESCE); 2518 } 2519 2520 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 2521 } 2522 2523 int 2524 vmxnet3_activate_dev(struct vmxnet3_adapter *adapter) 2525 { 2526 int err, i; 2527 u32 ret; 2528 unsigned long flags; 2529 2530 netdev_dbg(adapter->netdev, "%s: skb_buf_size %d, rx_buf_per_pkt %d," 2531 " ring sizes %u %u %u\n", adapter->netdev->name, 2532 adapter->skb_buf_size, adapter->rx_buf_per_pkt, 2533 adapter->tx_queue[0].tx_ring.size, 2534 adapter->rx_queue[0].rx_ring[0].size, 2535 adapter->rx_queue[0].rx_ring[1].size); 2536 2537 vmxnet3_tq_init_all(adapter); 2538 err = vmxnet3_rq_init_all(adapter); 2539 if (err) { 2540 netdev_err(adapter->netdev, 2541 "Failed to init rx queue error %d\n", err); 2542 goto rq_err; 2543 } 2544 2545 err = vmxnet3_request_irqs(adapter); 2546 if (err) { 2547 netdev_err(adapter->netdev, 2548 "Failed to setup irq for error %d\n", err); 2549 goto irq_err; 2550 } 2551 2552 vmxnet3_setup_driver_shared(adapter); 2553 2554 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAL, VMXNET3_GET_ADDR_LO( 2555 adapter->shared_pa)); 2556 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAH, VMXNET3_GET_ADDR_HI( 2557 adapter->shared_pa)); 2558 spin_lock_irqsave(&adapter->cmd_lock, flags); 2559 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 2560 VMXNET3_CMD_ACTIVATE_DEV); 2561 ret = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD); 2562 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 2563 2564 if (ret != 0) { 2565 netdev_err(adapter->netdev, 2566 "Failed to activate dev: error %u\n", ret); 2567 err = -EINVAL; 2568 goto activate_err; 2569 } 2570 2571 vmxnet3_init_coalesce(adapter); 2572 2573 for (i = 0; i < adapter->num_rx_queues; i++) { 2574 VMXNET3_WRITE_BAR0_REG(adapter, 2575 VMXNET3_REG_RXPROD + i * VMXNET3_REG_ALIGN, 2576 adapter->rx_queue[i].rx_ring[0].next2fill); 2577 VMXNET3_WRITE_BAR0_REG(adapter, (VMXNET3_REG_RXPROD2 + 2578 (i * VMXNET3_REG_ALIGN)), 2579 adapter->rx_queue[i].rx_ring[1].next2fill); 2580 } 2581 2582 /* Apply the rx filter settins last. */ 2583 vmxnet3_set_mc(adapter->netdev); 2584 2585 /* 2586 * Check link state when first activating device. It will start the 2587 * tx queue if the link is up. 2588 */ 2589 vmxnet3_check_link(adapter, true); 2590 for (i = 0; i < adapter->num_rx_queues; i++) 2591 napi_enable(&adapter->rx_queue[i].napi); 2592 vmxnet3_enable_all_intrs(adapter); 2593 clear_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state); 2594 return 0; 2595 2596 activate_err: 2597 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAL, 0); 2598 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAH, 0); 2599 vmxnet3_free_irqs(adapter); 2600 irq_err: 2601 rq_err: 2602 /* free up buffers we allocated */ 2603 vmxnet3_rq_cleanup_all(adapter); 2604 return err; 2605 } 2606 2607 2608 void 2609 vmxnet3_reset_dev(struct vmxnet3_adapter *adapter) 2610 { 2611 unsigned long flags; 2612 spin_lock_irqsave(&adapter->cmd_lock, flags); 2613 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_RESET_DEV); 2614 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 2615 } 2616 2617 2618 int 2619 vmxnet3_quiesce_dev(struct vmxnet3_adapter *adapter) 2620 { 2621 int i; 2622 unsigned long flags; 2623 if (test_and_set_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state)) 2624 return 0; 2625 2626 2627 spin_lock_irqsave(&adapter->cmd_lock, flags); 2628 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 2629 VMXNET3_CMD_QUIESCE_DEV); 2630 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 2631 vmxnet3_disable_all_intrs(adapter); 2632 2633 for (i = 0; i < adapter->num_rx_queues; i++) 2634 napi_disable(&adapter->rx_queue[i].napi); 2635 netif_tx_disable(adapter->netdev); 2636 adapter->link_speed = 0; 2637 netif_carrier_off(adapter->netdev); 2638 2639 vmxnet3_tq_cleanup_all(adapter); 2640 vmxnet3_rq_cleanup_all(adapter); 2641 vmxnet3_free_irqs(adapter); 2642 return 0; 2643 } 2644 2645 2646 static void 2647 vmxnet3_write_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac) 2648 { 2649 u32 tmp; 2650 2651 tmp = *(u32 *)mac; 2652 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_MACL, tmp); 2653 2654 tmp = (mac[5] << 8) | mac[4]; 2655 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_MACH, tmp); 2656 } 2657 2658 2659 static int 2660 vmxnet3_set_mac_addr(struct net_device *netdev, void *p) 2661 { 2662 struct sockaddr *addr = p; 2663 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 2664 2665 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); 2666 vmxnet3_write_mac_addr(adapter, addr->sa_data); 2667 2668 return 0; 2669 } 2670 2671 2672 /* ==================== initialization and cleanup routines ============ */ 2673 2674 static int 2675 vmxnet3_alloc_pci_resources(struct vmxnet3_adapter *adapter, bool *dma64) 2676 { 2677 int err; 2678 unsigned long mmio_start, mmio_len; 2679 struct pci_dev *pdev = adapter->pdev; 2680 2681 err = pci_enable_device(pdev); 2682 if (err) { 2683 dev_err(&pdev->dev, "Failed to enable adapter: error %d\n", err); 2684 return err; 2685 } 2686 2687 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) == 0) { 2688 if (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)) != 0) { 2689 dev_err(&pdev->dev, 2690 "pci_set_consistent_dma_mask failed\n"); 2691 err = -EIO; 2692 goto err_set_mask; 2693 } 2694 *dma64 = true; 2695 } else { 2696 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) { 2697 dev_err(&pdev->dev, 2698 "pci_set_dma_mask failed\n"); 2699 err = -EIO; 2700 goto err_set_mask; 2701 } 2702 *dma64 = false; 2703 } 2704 2705 err = pci_request_selected_regions(pdev, (1 << 2) - 1, 2706 vmxnet3_driver_name); 2707 if (err) { 2708 dev_err(&pdev->dev, 2709 "Failed to request region for adapter: error %d\n", err); 2710 goto err_set_mask; 2711 } 2712 2713 pci_set_master(pdev); 2714 2715 mmio_start = pci_resource_start(pdev, 0); 2716 mmio_len = pci_resource_len(pdev, 0); 2717 adapter->hw_addr0 = ioremap(mmio_start, mmio_len); 2718 if (!adapter->hw_addr0) { 2719 dev_err(&pdev->dev, "Failed to map bar0\n"); 2720 err = -EIO; 2721 goto err_ioremap; 2722 } 2723 2724 mmio_start = pci_resource_start(pdev, 1); 2725 mmio_len = pci_resource_len(pdev, 1); 2726 adapter->hw_addr1 = ioremap(mmio_start, mmio_len); 2727 if (!adapter->hw_addr1) { 2728 dev_err(&pdev->dev, "Failed to map bar1\n"); 2729 err = -EIO; 2730 goto err_bar1; 2731 } 2732 return 0; 2733 2734 err_bar1: 2735 iounmap(adapter->hw_addr0); 2736 err_ioremap: 2737 pci_release_selected_regions(pdev, (1 << 2) - 1); 2738 err_set_mask: 2739 pci_disable_device(pdev); 2740 return err; 2741 } 2742 2743 2744 static void 2745 vmxnet3_free_pci_resources(struct vmxnet3_adapter *adapter) 2746 { 2747 BUG_ON(!adapter->pdev); 2748 2749 iounmap(adapter->hw_addr0); 2750 iounmap(adapter->hw_addr1); 2751 pci_release_selected_regions(adapter->pdev, (1 << 2) - 1); 2752 pci_disable_device(adapter->pdev); 2753 } 2754 2755 2756 static void 2757 vmxnet3_adjust_rx_ring_size(struct vmxnet3_adapter *adapter) 2758 { 2759 size_t sz, i, ring0_size, ring1_size, comp_size; 2760 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[0]; 2761 2762 2763 if (adapter->netdev->mtu <= VMXNET3_MAX_SKB_BUF_SIZE - 2764 VMXNET3_MAX_ETH_HDR_SIZE) { 2765 adapter->skb_buf_size = adapter->netdev->mtu + 2766 VMXNET3_MAX_ETH_HDR_SIZE; 2767 if (adapter->skb_buf_size < VMXNET3_MIN_T0_BUF_SIZE) 2768 adapter->skb_buf_size = VMXNET3_MIN_T0_BUF_SIZE; 2769 2770 adapter->rx_buf_per_pkt = 1; 2771 } else { 2772 adapter->skb_buf_size = VMXNET3_MAX_SKB_BUF_SIZE; 2773 sz = adapter->netdev->mtu - VMXNET3_MAX_SKB_BUF_SIZE + 2774 VMXNET3_MAX_ETH_HDR_SIZE; 2775 adapter->rx_buf_per_pkt = 1 + (sz + PAGE_SIZE - 1) / PAGE_SIZE; 2776 } 2777 2778 /* 2779 * for simplicity, force the ring0 size to be a multiple of 2780 * rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN 2781 */ 2782 sz = adapter->rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN; 2783 ring0_size = adapter->rx_queue[0].rx_ring[0].size; 2784 ring0_size = (ring0_size + sz - 1) / sz * sz; 2785 ring0_size = min_t(u32, ring0_size, VMXNET3_RX_RING_MAX_SIZE / 2786 sz * sz); 2787 ring1_size = adapter->rx_queue[0].rx_ring[1].size; 2788 ring1_size = (ring1_size + sz - 1) / sz * sz; 2789 ring1_size = min_t(u32, ring1_size, VMXNET3_RX_RING2_MAX_SIZE / 2790 sz * sz); 2791 comp_size = ring0_size + ring1_size; 2792 2793 for (i = 0; i < adapter->num_rx_queues; i++) { 2794 rq = &adapter->rx_queue[i]; 2795 rq->rx_ring[0].size = ring0_size; 2796 rq->rx_ring[1].size = ring1_size; 2797 rq->comp_ring.size = comp_size; 2798 } 2799 } 2800 2801 2802 int 2803 vmxnet3_create_queues(struct vmxnet3_adapter *adapter, u32 tx_ring_size, 2804 u32 rx_ring_size, u32 rx_ring2_size, 2805 u16 txdata_desc_size, u16 rxdata_desc_size) 2806 { 2807 int err = 0, i; 2808 2809 for (i = 0; i < adapter->num_tx_queues; i++) { 2810 struct vmxnet3_tx_queue *tq = &adapter->tx_queue[i]; 2811 tq->tx_ring.size = tx_ring_size; 2812 tq->data_ring.size = tx_ring_size; 2813 tq->comp_ring.size = tx_ring_size; 2814 tq->txdata_desc_size = txdata_desc_size; 2815 tq->shared = &adapter->tqd_start[i].ctrl; 2816 tq->stopped = true; 2817 tq->adapter = adapter; 2818 tq->qid = i; 2819 err = vmxnet3_tq_create(tq, adapter); 2820 /* 2821 * Too late to change num_tx_queues. We cannot do away with 2822 * lesser number of queues than what we asked for 2823 */ 2824 if (err) 2825 goto queue_err; 2826 } 2827 2828 adapter->rx_queue[0].rx_ring[0].size = rx_ring_size; 2829 adapter->rx_queue[0].rx_ring[1].size = rx_ring2_size; 2830 vmxnet3_adjust_rx_ring_size(adapter); 2831 2832 adapter->rxdataring_enabled = VMXNET3_VERSION_GE_3(adapter); 2833 for (i = 0; i < adapter->num_rx_queues; i++) { 2834 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i]; 2835 /* qid and qid2 for rx queues will be assigned later when num 2836 * of rx queues is finalized after allocating intrs */ 2837 rq->shared = &adapter->rqd_start[i].ctrl; 2838 rq->adapter = adapter; 2839 rq->data_ring.desc_size = rxdata_desc_size; 2840 err = vmxnet3_rq_create(rq, adapter); 2841 if (err) { 2842 if (i == 0) { 2843 netdev_err(adapter->netdev, 2844 "Could not allocate any rx queues. " 2845 "Aborting.\n"); 2846 goto queue_err; 2847 } else { 2848 netdev_info(adapter->netdev, 2849 "Number of rx queues changed " 2850 "to : %d.\n", i); 2851 adapter->num_rx_queues = i; 2852 err = 0; 2853 break; 2854 } 2855 } 2856 } 2857 2858 if (!adapter->rxdataring_enabled) 2859 vmxnet3_rq_destroy_all_rxdataring(adapter); 2860 2861 return err; 2862 queue_err: 2863 vmxnet3_tq_destroy_all(adapter); 2864 return err; 2865 } 2866 2867 static int 2868 vmxnet3_open(struct net_device *netdev) 2869 { 2870 struct vmxnet3_adapter *adapter; 2871 int err, i; 2872 2873 adapter = netdev_priv(netdev); 2874 2875 for (i = 0; i < adapter->num_tx_queues; i++) 2876 spin_lock_init(&adapter->tx_queue[i].tx_lock); 2877 2878 if (VMXNET3_VERSION_GE_3(adapter)) { 2879 unsigned long flags; 2880 u16 txdata_desc_size; 2881 2882 spin_lock_irqsave(&adapter->cmd_lock, flags); 2883 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 2884 VMXNET3_CMD_GET_TXDATA_DESC_SIZE); 2885 txdata_desc_size = VMXNET3_READ_BAR1_REG(adapter, 2886 VMXNET3_REG_CMD); 2887 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 2888 2889 if ((txdata_desc_size < VMXNET3_TXDATA_DESC_MIN_SIZE) || 2890 (txdata_desc_size > VMXNET3_TXDATA_DESC_MAX_SIZE) || 2891 (txdata_desc_size & VMXNET3_TXDATA_DESC_SIZE_MASK)) { 2892 adapter->txdata_desc_size = 2893 sizeof(struct Vmxnet3_TxDataDesc); 2894 } else { 2895 adapter->txdata_desc_size = txdata_desc_size; 2896 } 2897 } else { 2898 adapter->txdata_desc_size = sizeof(struct Vmxnet3_TxDataDesc); 2899 } 2900 2901 err = vmxnet3_create_queues(adapter, 2902 adapter->tx_ring_size, 2903 adapter->rx_ring_size, 2904 adapter->rx_ring2_size, 2905 adapter->txdata_desc_size, 2906 adapter->rxdata_desc_size); 2907 if (err) 2908 goto queue_err; 2909 2910 err = vmxnet3_activate_dev(adapter); 2911 if (err) 2912 goto activate_err; 2913 2914 return 0; 2915 2916 activate_err: 2917 vmxnet3_rq_destroy_all(adapter); 2918 vmxnet3_tq_destroy_all(adapter); 2919 queue_err: 2920 return err; 2921 } 2922 2923 2924 static int 2925 vmxnet3_close(struct net_device *netdev) 2926 { 2927 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 2928 2929 /* 2930 * Reset_work may be in the middle of resetting the device, wait for its 2931 * completion. 2932 */ 2933 while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state)) 2934 msleep(1); 2935 2936 vmxnet3_quiesce_dev(adapter); 2937 2938 vmxnet3_rq_destroy_all(adapter); 2939 vmxnet3_tq_destroy_all(adapter); 2940 2941 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state); 2942 2943 2944 return 0; 2945 } 2946 2947 2948 void 2949 vmxnet3_force_close(struct vmxnet3_adapter *adapter) 2950 { 2951 int i; 2952 2953 /* 2954 * we must clear VMXNET3_STATE_BIT_RESETTING, otherwise 2955 * vmxnet3_close() will deadlock. 2956 */ 2957 BUG_ON(test_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state)); 2958 2959 /* we need to enable NAPI, otherwise dev_close will deadlock */ 2960 for (i = 0; i < adapter->num_rx_queues; i++) 2961 napi_enable(&adapter->rx_queue[i].napi); 2962 dev_close(adapter->netdev); 2963 } 2964 2965 2966 static int 2967 vmxnet3_change_mtu(struct net_device *netdev, int new_mtu) 2968 { 2969 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 2970 int err = 0; 2971 2972 if (new_mtu < VMXNET3_MIN_MTU || new_mtu > VMXNET3_MAX_MTU) 2973 return -EINVAL; 2974 2975 netdev->mtu = new_mtu; 2976 2977 /* 2978 * Reset_work may be in the middle of resetting the device, wait for its 2979 * completion. 2980 */ 2981 while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state)) 2982 msleep(1); 2983 2984 if (netif_running(netdev)) { 2985 vmxnet3_quiesce_dev(adapter); 2986 vmxnet3_reset_dev(adapter); 2987 2988 /* we need to re-create the rx queue based on the new mtu */ 2989 vmxnet3_rq_destroy_all(adapter); 2990 vmxnet3_adjust_rx_ring_size(adapter); 2991 err = vmxnet3_rq_create_all(adapter); 2992 if (err) { 2993 netdev_err(netdev, 2994 "failed to re-create rx queues, " 2995 " error %d. Closing it.\n", err); 2996 goto out; 2997 } 2998 2999 err = vmxnet3_activate_dev(adapter); 3000 if (err) { 3001 netdev_err(netdev, 3002 "failed to re-activate, error %d. " 3003 "Closing it\n", err); 3004 goto out; 3005 } 3006 } 3007 3008 out: 3009 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state); 3010 if (err) 3011 vmxnet3_force_close(adapter); 3012 3013 return err; 3014 } 3015 3016 3017 static void 3018 vmxnet3_declare_features(struct vmxnet3_adapter *adapter, bool dma64) 3019 { 3020 struct net_device *netdev = adapter->netdev; 3021 3022 netdev->hw_features = NETIF_F_SG | NETIF_F_RXCSUM | 3023 NETIF_F_HW_CSUM | NETIF_F_HW_VLAN_CTAG_TX | 3024 NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_TSO | NETIF_F_TSO6 | 3025 NETIF_F_LRO; 3026 if (dma64) 3027 netdev->hw_features |= NETIF_F_HIGHDMA; 3028 netdev->vlan_features = netdev->hw_features & 3029 ~(NETIF_F_HW_VLAN_CTAG_TX | 3030 NETIF_F_HW_VLAN_CTAG_RX); 3031 netdev->features = netdev->hw_features | NETIF_F_HW_VLAN_CTAG_FILTER; 3032 } 3033 3034 3035 static void 3036 vmxnet3_read_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac) 3037 { 3038 u32 tmp; 3039 3040 tmp = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_MACL); 3041 *(u32 *)mac = tmp; 3042 3043 tmp = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_MACH); 3044 mac[4] = tmp & 0xff; 3045 mac[5] = (tmp >> 8) & 0xff; 3046 } 3047 3048 #ifdef CONFIG_PCI_MSI 3049 3050 /* 3051 * Enable MSIx vectors. 3052 * Returns : 3053 * VMXNET3_LINUX_MIN_MSIX_VECT when only minimum number of vectors required 3054 * were enabled. 3055 * number of vectors which were enabled otherwise (this number is greater 3056 * than VMXNET3_LINUX_MIN_MSIX_VECT) 3057 */ 3058 3059 static int 3060 vmxnet3_acquire_msix_vectors(struct vmxnet3_adapter *adapter, int nvec) 3061 { 3062 int ret = pci_enable_msix_range(adapter->pdev, 3063 adapter->intr.msix_entries, nvec, nvec); 3064 3065 if (ret == -ENOSPC && nvec > VMXNET3_LINUX_MIN_MSIX_VECT) { 3066 dev_err(&adapter->netdev->dev, 3067 "Failed to enable %d MSI-X, trying %d\n", 3068 nvec, VMXNET3_LINUX_MIN_MSIX_VECT); 3069 3070 ret = pci_enable_msix_range(adapter->pdev, 3071 adapter->intr.msix_entries, 3072 VMXNET3_LINUX_MIN_MSIX_VECT, 3073 VMXNET3_LINUX_MIN_MSIX_VECT); 3074 } 3075 3076 if (ret < 0) { 3077 dev_err(&adapter->netdev->dev, 3078 "Failed to enable MSI-X, error: %d\n", ret); 3079 } 3080 3081 return ret; 3082 } 3083 3084 3085 #endif /* CONFIG_PCI_MSI */ 3086 3087 static void 3088 vmxnet3_alloc_intr_resources(struct vmxnet3_adapter *adapter) 3089 { 3090 u32 cfg; 3091 unsigned long flags; 3092 3093 /* intr settings */ 3094 spin_lock_irqsave(&adapter->cmd_lock, flags); 3095 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 3096 VMXNET3_CMD_GET_CONF_INTR); 3097 cfg = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD); 3098 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 3099 adapter->intr.type = cfg & 0x3; 3100 adapter->intr.mask_mode = (cfg >> 2) & 0x3; 3101 3102 if (adapter->intr.type == VMXNET3_IT_AUTO) { 3103 adapter->intr.type = VMXNET3_IT_MSIX; 3104 } 3105 3106 #ifdef CONFIG_PCI_MSI 3107 if (adapter->intr.type == VMXNET3_IT_MSIX) { 3108 int i, nvec; 3109 3110 nvec = adapter->share_intr == VMXNET3_INTR_TXSHARE ? 3111 1 : adapter->num_tx_queues; 3112 nvec += adapter->share_intr == VMXNET3_INTR_BUDDYSHARE ? 3113 0 : adapter->num_rx_queues; 3114 nvec += 1; /* for link event */ 3115 nvec = nvec > VMXNET3_LINUX_MIN_MSIX_VECT ? 3116 nvec : VMXNET3_LINUX_MIN_MSIX_VECT; 3117 3118 for (i = 0; i < nvec; i++) 3119 adapter->intr.msix_entries[i].entry = i; 3120 3121 nvec = vmxnet3_acquire_msix_vectors(adapter, nvec); 3122 if (nvec < 0) 3123 goto msix_err; 3124 3125 /* If we cannot allocate one MSIx vector per queue 3126 * then limit the number of rx queues to 1 3127 */ 3128 if (nvec == VMXNET3_LINUX_MIN_MSIX_VECT) { 3129 if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE 3130 || adapter->num_rx_queues != 1) { 3131 adapter->share_intr = VMXNET3_INTR_TXSHARE; 3132 netdev_err(adapter->netdev, 3133 "Number of rx queues : 1\n"); 3134 adapter->num_rx_queues = 1; 3135 } 3136 } 3137 3138 adapter->intr.num_intrs = nvec; 3139 return; 3140 3141 msix_err: 3142 /* If we cannot allocate MSIx vectors use only one rx queue */ 3143 dev_info(&adapter->pdev->dev, 3144 "Failed to enable MSI-X, error %d. " 3145 "Limiting #rx queues to 1, try MSI.\n", nvec); 3146 3147 adapter->intr.type = VMXNET3_IT_MSI; 3148 } 3149 3150 if (adapter->intr.type == VMXNET3_IT_MSI) { 3151 if (!pci_enable_msi(adapter->pdev)) { 3152 adapter->num_rx_queues = 1; 3153 adapter->intr.num_intrs = 1; 3154 return; 3155 } 3156 } 3157 #endif /* CONFIG_PCI_MSI */ 3158 3159 adapter->num_rx_queues = 1; 3160 dev_info(&adapter->netdev->dev, 3161 "Using INTx interrupt, #Rx queues: 1.\n"); 3162 adapter->intr.type = VMXNET3_IT_INTX; 3163 3164 /* INT-X related setting */ 3165 adapter->intr.num_intrs = 1; 3166 } 3167 3168 3169 static void 3170 vmxnet3_free_intr_resources(struct vmxnet3_adapter *adapter) 3171 { 3172 if (adapter->intr.type == VMXNET3_IT_MSIX) 3173 pci_disable_msix(adapter->pdev); 3174 else if (adapter->intr.type == VMXNET3_IT_MSI) 3175 pci_disable_msi(adapter->pdev); 3176 else 3177 BUG_ON(adapter->intr.type != VMXNET3_IT_INTX); 3178 } 3179 3180 3181 static void 3182 vmxnet3_tx_timeout(struct net_device *netdev) 3183 { 3184 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 3185 adapter->tx_timeout_count++; 3186 3187 netdev_err(adapter->netdev, "tx hang\n"); 3188 schedule_work(&adapter->work); 3189 } 3190 3191 3192 static void 3193 vmxnet3_reset_work(struct work_struct *data) 3194 { 3195 struct vmxnet3_adapter *adapter; 3196 3197 adapter = container_of(data, struct vmxnet3_adapter, work); 3198 3199 /* if another thread is resetting the device, no need to proceed */ 3200 if (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state)) 3201 return; 3202 3203 /* if the device is closed, we must leave it alone */ 3204 rtnl_lock(); 3205 if (netif_running(adapter->netdev)) { 3206 netdev_notice(adapter->netdev, "resetting\n"); 3207 vmxnet3_quiesce_dev(adapter); 3208 vmxnet3_reset_dev(adapter); 3209 vmxnet3_activate_dev(adapter); 3210 } else { 3211 netdev_info(adapter->netdev, "already closed\n"); 3212 } 3213 rtnl_unlock(); 3214 3215 netif_wake_queue(adapter->netdev); 3216 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state); 3217 } 3218 3219 3220 static int 3221 vmxnet3_probe_device(struct pci_dev *pdev, 3222 const struct pci_device_id *id) 3223 { 3224 static const struct net_device_ops vmxnet3_netdev_ops = { 3225 .ndo_open = vmxnet3_open, 3226 .ndo_stop = vmxnet3_close, 3227 .ndo_start_xmit = vmxnet3_xmit_frame, 3228 .ndo_set_mac_address = vmxnet3_set_mac_addr, 3229 .ndo_change_mtu = vmxnet3_change_mtu, 3230 .ndo_set_features = vmxnet3_set_features, 3231 .ndo_get_stats64 = vmxnet3_get_stats64, 3232 .ndo_tx_timeout = vmxnet3_tx_timeout, 3233 .ndo_set_rx_mode = vmxnet3_set_mc, 3234 .ndo_vlan_rx_add_vid = vmxnet3_vlan_rx_add_vid, 3235 .ndo_vlan_rx_kill_vid = vmxnet3_vlan_rx_kill_vid, 3236 #ifdef CONFIG_NET_POLL_CONTROLLER 3237 .ndo_poll_controller = vmxnet3_netpoll, 3238 #endif 3239 }; 3240 int err; 3241 bool dma64 = false; /* stupid gcc */ 3242 u32 ver; 3243 struct net_device *netdev; 3244 struct vmxnet3_adapter *adapter; 3245 u8 mac[ETH_ALEN]; 3246 int size; 3247 int num_tx_queues; 3248 int num_rx_queues; 3249 3250 if (!pci_msi_enabled()) 3251 enable_mq = 0; 3252 3253 #ifdef VMXNET3_RSS 3254 if (enable_mq) 3255 num_rx_queues = min(VMXNET3_DEVICE_MAX_RX_QUEUES, 3256 (int)num_online_cpus()); 3257 else 3258 #endif 3259 num_rx_queues = 1; 3260 num_rx_queues = rounddown_pow_of_two(num_rx_queues); 3261 3262 if (enable_mq) 3263 num_tx_queues = min(VMXNET3_DEVICE_MAX_TX_QUEUES, 3264 (int)num_online_cpus()); 3265 else 3266 num_tx_queues = 1; 3267 3268 num_tx_queues = rounddown_pow_of_two(num_tx_queues); 3269 netdev = alloc_etherdev_mq(sizeof(struct vmxnet3_adapter), 3270 max(num_tx_queues, num_rx_queues)); 3271 dev_info(&pdev->dev, 3272 "# of Tx queues : %d, # of Rx queues : %d\n", 3273 num_tx_queues, num_rx_queues); 3274 3275 if (!netdev) 3276 return -ENOMEM; 3277 3278 pci_set_drvdata(pdev, netdev); 3279 adapter = netdev_priv(netdev); 3280 adapter->netdev = netdev; 3281 adapter->pdev = pdev; 3282 3283 adapter->tx_ring_size = VMXNET3_DEF_TX_RING_SIZE; 3284 adapter->rx_ring_size = VMXNET3_DEF_RX_RING_SIZE; 3285 adapter->rx_ring2_size = VMXNET3_DEF_RX_RING2_SIZE; 3286 3287 spin_lock_init(&adapter->cmd_lock); 3288 adapter->adapter_pa = dma_map_single(&adapter->pdev->dev, adapter, 3289 sizeof(struct vmxnet3_adapter), 3290 PCI_DMA_TODEVICE); 3291 if (dma_mapping_error(&adapter->pdev->dev, adapter->adapter_pa)) { 3292 dev_err(&pdev->dev, "Failed to map dma\n"); 3293 err = -EFAULT; 3294 goto err_dma_map; 3295 } 3296 adapter->shared = dma_alloc_coherent( 3297 &adapter->pdev->dev, 3298 sizeof(struct Vmxnet3_DriverShared), 3299 &adapter->shared_pa, GFP_KERNEL); 3300 if (!adapter->shared) { 3301 dev_err(&pdev->dev, "Failed to allocate memory\n"); 3302 err = -ENOMEM; 3303 goto err_alloc_shared; 3304 } 3305 3306 adapter->num_rx_queues = num_rx_queues; 3307 adapter->num_tx_queues = num_tx_queues; 3308 adapter->rx_buf_per_pkt = 1; 3309 3310 size = sizeof(struct Vmxnet3_TxQueueDesc) * adapter->num_tx_queues; 3311 size += sizeof(struct Vmxnet3_RxQueueDesc) * adapter->num_rx_queues; 3312 adapter->tqd_start = dma_alloc_coherent(&adapter->pdev->dev, size, 3313 &adapter->queue_desc_pa, 3314 GFP_KERNEL); 3315 3316 if (!adapter->tqd_start) { 3317 dev_err(&pdev->dev, "Failed to allocate memory\n"); 3318 err = -ENOMEM; 3319 goto err_alloc_queue_desc; 3320 } 3321 adapter->rqd_start = (struct Vmxnet3_RxQueueDesc *)(adapter->tqd_start + 3322 adapter->num_tx_queues); 3323 3324 adapter->pm_conf = dma_alloc_coherent(&adapter->pdev->dev, 3325 sizeof(struct Vmxnet3_PMConf), 3326 &adapter->pm_conf_pa, 3327 GFP_KERNEL); 3328 if (adapter->pm_conf == NULL) { 3329 err = -ENOMEM; 3330 goto err_alloc_pm; 3331 } 3332 3333 #ifdef VMXNET3_RSS 3334 3335 adapter->rss_conf = dma_alloc_coherent(&adapter->pdev->dev, 3336 sizeof(struct UPT1_RSSConf), 3337 &adapter->rss_conf_pa, 3338 GFP_KERNEL); 3339 if (adapter->rss_conf == NULL) { 3340 err = -ENOMEM; 3341 goto err_alloc_rss; 3342 } 3343 #endif /* VMXNET3_RSS */ 3344 3345 err = vmxnet3_alloc_pci_resources(adapter, &dma64); 3346 if (err < 0) 3347 goto err_alloc_pci; 3348 3349 ver = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_VRRS); 3350 if (ver & (1 << VMXNET3_REV_3)) { 3351 VMXNET3_WRITE_BAR1_REG(adapter, 3352 VMXNET3_REG_VRRS, 3353 1 << VMXNET3_REV_3); 3354 adapter->version = VMXNET3_REV_3 + 1; 3355 } else if (ver & (1 << VMXNET3_REV_2)) { 3356 VMXNET3_WRITE_BAR1_REG(adapter, 3357 VMXNET3_REG_VRRS, 3358 1 << VMXNET3_REV_2); 3359 adapter->version = VMXNET3_REV_2 + 1; 3360 } else if (ver & (1 << VMXNET3_REV_1)) { 3361 VMXNET3_WRITE_BAR1_REG(adapter, 3362 VMXNET3_REG_VRRS, 3363 1 << VMXNET3_REV_1); 3364 adapter->version = VMXNET3_REV_1 + 1; 3365 } else { 3366 dev_err(&pdev->dev, 3367 "Incompatible h/w version (0x%x) for adapter\n", ver); 3368 err = -EBUSY; 3369 goto err_ver; 3370 } 3371 dev_dbg(&pdev->dev, "Using device version %d\n", adapter->version); 3372 3373 ver = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_UVRS); 3374 if (ver & 1) { 3375 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_UVRS, 1); 3376 } else { 3377 dev_err(&pdev->dev, 3378 "Incompatible upt version (0x%x) for adapter\n", ver); 3379 err = -EBUSY; 3380 goto err_ver; 3381 } 3382 3383 if (VMXNET3_VERSION_GE_3(adapter)) { 3384 adapter->coal_conf = 3385 dma_alloc_coherent(&adapter->pdev->dev, 3386 sizeof(struct Vmxnet3_CoalesceScheme) 3387 , 3388 &adapter->coal_conf_pa, 3389 GFP_KERNEL); 3390 if (!adapter->coal_conf) { 3391 err = -ENOMEM; 3392 goto err_ver; 3393 } 3394 memset(adapter->coal_conf, 0, sizeof(*adapter->coal_conf)); 3395 adapter->coal_conf->coalMode = VMXNET3_COALESCE_DISABLED; 3396 adapter->default_coal_mode = true; 3397 } 3398 3399 SET_NETDEV_DEV(netdev, &pdev->dev); 3400 vmxnet3_declare_features(adapter, dma64); 3401 3402 adapter->rxdata_desc_size = VMXNET3_VERSION_GE_3(adapter) ? 3403 VMXNET3_DEF_RXDATA_DESC_SIZE : 0; 3404 3405 if (adapter->num_tx_queues == adapter->num_rx_queues) 3406 adapter->share_intr = VMXNET3_INTR_BUDDYSHARE; 3407 else 3408 adapter->share_intr = VMXNET3_INTR_DONTSHARE; 3409 3410 vmxnet3_alloc_intr_resources(adapter); 3411 3412 #ifdef VMXNET3_RSS 3413 if (adapter->num_rx_queues > 1 && 3414 adapter->intr.type == VMXNET3_IT_MSIX) { 3415 adapter->rss = true; 3416 netdev->hw_features |= NETIF_F_RXHASH; 3417 netdev->features |= NETIF_F_RXHASH; 3418 dev_dbg(&pdev->dev, "RSS is enabled.\n"); 3419 } else { 3420 adapter->rss = false; 3421 } 3422 #endif 3423 3424 vmxnet3_read_mac_addr(adapter, mac); 3425 memcpy(netdev->dev_addr, mac, netdev->addr_len); 3426 3427 netdev->netdev_ops = &vmxnet3_netdev_ops; 3428 vmxnet3_set_ethtool_ops(netdev); 3429 netdev->watchdog_timeo = 5 * HZ; 3430 3431 INIT_WORK(&adapter->work, vmxnet3_reset_work); 3432 set_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state); 3433 3434 if (adapter->intr.type == VMXNET3_IT_MSIX) { 3435 int i; 3436 for (i = 0; i < adapter->num_rx_queues; i++) { 3437 netif_napi_add(adapter->netdev, 3438 &adapter->rx_queue[i].napi, 3439 vmxnet3_poll_rx_only, 64); 3440 } 3441 } else { 3442 netif_napi_add(adapter->netdev, &adapter->rx_queue[0].napi, 3443 vmxnet3_poll, 64); 3444 } 3445 3446 netif_set_real_num_tx_queues(adapter->netdev, adapter->num_tx_queues); 3447 netif_set_real_num_rx_queues(adapter->netdev, adapter->num_rx_queues); 3448 3449 netif_carrier_off(netdev); 3450 err = register_netdev(netdev); 3451 3452 if (err) { 3453 dev_err(&pdev->dev, "Failed to register adapter\n"); 3454 goto err_register; 3455 } 3456 3457 vmxnet3_check_link(adapter, false); 3458 return 0; 3459 3460 err_register: 3461 if (VMXNET3_VERSION_GE_3(adapter)) { 3462 dma_free_coherent(&adapter->pdev->dev, 3463 sizeof(struct Vmxnet3_CoalesceScheme), 3464 adapter->coal_conf, adapter->coal_conf_pa); 3465 } 3466 vmxnet3_free_intr_resources(adapter); 3467 err_ver: 3468 vmxnet3_free_pci_resources(adapter); 3469 err_alloc_pci: 3470 #ifdef VMXNET3_RSS 3471 dma_free_coherent(&adapter->pdev->dev, sizeof(struct UPT1_RSSConf), 3472 adapter->rss_conf, adapter->rss_conf_pa); 3473 err_alloc_rss: 3474 #endif 3475 dma_free_coherent(&adapter->pdev->dev, sizeof(struct Vmxnet3_PMConf), 3476 adapter->pm_conf, adapter->pm_conf_pa); 3477 err_alloc_pm: 3478 dma_free_coherent(&adapter->pdev->dev, size, adapter->tqd_start, 3479 adapter->queue_desc_pa); 3480 err_alloc_queue_desc: 3481 dma_free_coherent(&adapter->pdev->dev, 3482 sizeof(struct Vmxnet3_DriverShared), 3483 adapter->shared, adapter->shared_pa); 3484 err_alloc_shared: 3485 dma_unmap_single(&adapter->pdev->dev, adapter->adapter_pa, 3486 sizeof(struct vmxnet3_adapter), PCI_DMA_TODEVICE); 3487 err_dma_map: 3488 free_netdev(netdev); 3489 return err; 3490 } 3491 3492 3493 static void 3494 vmxnet3_remove_device(struct pci_dev *pdev) 3495 { 3496 struct net_device *netdev = pci_get_drvdata(pdev); 3497 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 3498 int size = 0; 3499 int num_rx_queues; 3500 3501 #ifdef VMXNET3_RSS 3502 if (enable_mq) 3503 num_rx_queues = min(VMXNET3_DEVICE_MAX_RX_QUEUES, 3504 (int)num_online_cpus()); 3505 else 3506 #endif 3507 num_rx_queues = 1; 3508 num_rx_queues = rounddown_pow_of_two(num_rx_queues); 3509 3510 cancel_work_sync(&adapter->work); 3511 3512 unregister_netdev(netdev); 3513 3514 vmxnet3_free_intr_resources(adapter); 3515 vmxnet3_free_pci_resources(adapter); 3516 if (VMXNET3_VERSION_GE_3(adapter)) { 3517 dma_free_coherent(&adapter->pdev->dev, 3518 sizeof(struct Vmxnet3_CoalesceScheme), 3519 adapter->coal_conf, adapter->coal_conf_pa); 3520 } 3521 #ifdef VMXNET3_RSS 3522 dma_free_coherent(&adapter->pdev->dev, sizeof(struct UPT1_RSSConf), 3523 adapter->rss_conf, adapter->rss_conf_pa); 3524 #endif 3525 dma_free_coherent(&adapter->pdev->dev, sizeof(struct Vmxnet3_PMConf), 3526 adapter->pm_conf, adapter->pm_conf_pa); 3527 3528 size = sizeof(struct Vmxnet3_TxQueueDesc) * adapter->num_tx_queues; 3529 size += sizeof(struct Vmxnet3_RxQueueDesc) * num_rx_queues; 3530 dma_free_coherent(&adapter->pdev->dev, size, adapter->tqd_start, 3531 adapter->queue_desc_pa); 3532 dma_free_coherent(&adapter->pdev->dev, 3533 sizeof(struct Vmxnet3_DriverShared), 3534 adapter->shared, adapter->shared_pa); 3535 dma_unmap_single(&adapter->pdev->dev, adapter->adapter_pa, 3536 sizeof(struct vmxnet3_adapter), PCI_DMA_TODEVICE); 3537 free_netdev(netdev); 3538 } 3539 3540 static void vmxnet3_shutdown_device(struct pci_dev *pdev) 3541 { 3542 struct net_device *netdev = pci_get_drvdata(pdev); 3543 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 3544 unsigned long flags; 3545 3546 /* Reset_work may be in the middle of resetting the device, wait for its 3547 * completion. 3548 */ 3549 while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state)) 3550 msleep(1); 3551 3552 if (test_and_set_bit(VMXNET3_STATE_BIT_QUIESCED, 3553 &adapter->state)) { 3554 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state); 3555 return; 3556 } 3557 spin_lock_irqsave(&adapter->cmd_lock, flags); 3558 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 3559 VMXNET3_CMD_QUIESCE_DEV); 3560 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 3561 vmxnet3_disable_all_intrs(adapter); 3562 3563 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state); 3564 } 3565 3566 3567 #ifdef CONFIG_PM 3568 3569 static int 3570 vmxnet3_suspend(struct device *device) 3571 { 3572 struct pci_dev *pdev = to_pci_dev(device); 3573 struct net_device *netdev = pci_get_drvdata(pdev); 3574 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 3575 struct Vmxnet3_PMConf *pmConf; 3576 struct ethhdr *ehdr; 3577 struct arphdr *ahdr; 3578 u8 *arpreq; 3579 struct in_device *in_dev; 3580 struct in_ifaddr *ifa; 3581 unsigned long flags; 3582 int i = 0; 3583 3584 if (!netif_running(netdev)) 3585 return 0; 3586 3587 for (i = 0; i < adapter->num_rx_queues; i++) 3588 napi_disable(&adapter->rx_queue[i].napi); 3589 3590 vmxnet3_disable_all_intrs(adapter); 3591 vmxnet3_free_irqs(adapter); 3592 vmxnet3_free_intr_resources(adapter); 3593 3594 netif_device_detach(netdev); 3595 netif_tx_stop_all_queues(netdev); 3596 3597 /* Create wake-up filters. */ 3598 pmConf = adapter->pm_conf; 3599 memset(pmConf, 0, sizeof(*pmConf)); 3600 3601 if (adapter->wol & WAKE_UCAST) { 3602 pmConf->filters[i].patternSize = ETH_ALEN; 3603 pmConf->filters[i].maskSize = 1; 3604 memcpy(pmConf->filters[i].pattern, netdev->dev_addr, ETH_ALEN); 3605 pmConf->filters[i].mask[0] = 0x3F; /* LSB ETH_ALEN bits */ 3606 3607 pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_FILTER; 3608 i++; 3609 } 3610 3611 if (adapter->wol & WAKE_ARP) { 3612 in_dev = in_dev_get(netdev); 3613 if (!in_dev) 3614 goto skip_arp; 3615 3616 ifa = (struct in_ifaddr *)in_dev->ifa_list; 3617 if (!ifa) 3618 goto skip_arp; 3619 3620 pmConf->filters[i].patternSize = ETH_HLEN + /* Ethernet header*/ 3621 sizeof(struct arphdr) + /* ARP header */ 3622 2 * ETH_ALEN + /* 2 Ethernet addresses*/ 3623 2 * sizeof(u32); /*2 IPv4 addresses */ 3624 pmConf->filters[i].maskSize = 3625 (pmConf->filters[i].patternSize - 1) / 8 + 1; 3626 3627 /* ETH_P_ARP in Ethernet header. */ 3628 ehdr = (struct ethhdr *)pmConf->filters[i].pattern; 3629 ehdr->h_proto = htons(ETH_P_ARP); 3630 3631 /* ARPOP_REQUEST in ARP header. */ 3632 ahdr = (struct arphdr *)&pmConf->filters[i].pattern[ETH_HLEN]; 3633 ahdr->ar_op = htons(ARPOP_REQUEST); 3634 arpreq = (u8 *)(ahdr + 1); 3635 3636 /* The Unicast IPv4 address in 'tip' field. */ 3637 arpreq += 2 * ETH_ALEN + sizeof(u32); 3638 *(u32 *)arpreq = ifa->ifa_address; 3639 3640 /* The mask for the relevant bits. */ 3641 pmConf->filters[i].mask[0] = 0x00; 3642 pmConf->filters[i].mask[1] = 0x30; /* ETH_P_ARP */ 3643 pmConf->filters[i].mask[2] = 0x30; /* ARPOP_REQUEST */ 3644 pmConf->filters[i].mask[3] = 0x00; 3645 pmConf->filters[i].mask[4] = 0xC0; /* IPv4 TIP */ 3646 pmConf->filters[i].mask[5] = 0x03; /* IPv4 TIP */ 3647 in_dev_put(in_dev); 3648 3649 pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_FILTER; 3650 i++; 3651 } 3652 3653 skip_arp: 3654 if (adapter->wol & WAKE_MAGIC) 3655 pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_MAGIC; 3656 3657 pmConf->numFilters = i; 3658 3659 adapter->shared->devRead.pmConfDesc.confVer = cpu_to_le32(1); 3660 adapter->shared->devRead.pmConfDesc.confLen = cpu_to_le32(sizeof( 3661 *pmConf)); 3662 adapter->shared->devRead.pmConfDesc.confPA = 3663 cpu_to_le64(adapter->pm_conf_pa); 3664 3665 spin_lock_irqsave(&adapter->cmd_lock, flags); 3666 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 3667 VMXNET3_CMD_UPDATE_PMCFG); 3668 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 3669 3670 pci_save_state(pdev); 3671 pci_enable_wake(pdev, pci_choose_state(pdev, PMSG_SUSPEND), 3672 adapter->wol); 3673 pci_disable_device(pdev); 3674 pci_set_power_state(pdev, pci_choose_state(pdev, PMSG_SUSPEND)); 3675 3676 return 0; 3677 } 3678 3679 3680 static int 3681 vmxnet3_resume(struct device *device) 3682 { 3683 int err; 3684 unsigned long flags; 3685 struct pci_dev *pdev = to_pci_dev(device); 3686 struct net_device *netdev = pci_get_drvdata(pdev); 3687 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 3688 3689 if (!netif_running(netdev)) 3690 return 0; 3691 3692 pci_set_power_state(pdev, PCI_D0); 3693 pci_restore_state(pdev); 3694 err = pci_enable_device_mem(pdev); 3695 if (err != 0) 3696 return err; 3697 3698 pci_enable_wake(pdev, PCI_D0, 0); 3699 3700 vmxnet3_alloc_intr_resources(adapter); 3701 3702 /* During hibernate and suspend, device has to be reinitialized as the 3703 * device state need not be preserved. 3704 */ 3705 3706 /* Need not check adapter state as other reset tasks cannot run during 3707 * device resume. 3708 */ 3709 spin_lock_irqsave(&adapter->cmd_lock, flags); 3710 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 3711 VMXNET3_CMD_QUIESCE_DEV); 3712 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 3713 vmxnet3_tq_cleanup_all(adapter); 3714 vmxnet3_rq_cleanup_all(adapter); 3715 3716 vmxnet3_reset_dev(adapter); 3717 err = vmxnet3_activate_dev(adapter); 3718 if (err != 0) { 3719 netdev_err(netdev, 3720 "failed to re-activate on resume, error: %d", err); 3721 vmxnet3_force_close(adapter); 3722 return err; 3723 } 3724 netif_device_attach(netdev); 3725 3726 return 0; 3727 } 3728 3729 static const struct dev_pm_ops vmxnet3_pm_ops = { 3730 .suspend = vmxnet3_suspend, 3731 .resume = vmxnet3_resume, 3732 .freeze = vmxnet3_suspend, 3733 .restore = vmxnet3_resume, 3734 }; 3735 #endif 3736 3737 static struct pci_driver vmxnet3_driver = { 3738 .name = vmxnet3_driver_name, 3739 .id_table = vmxnet3_pciid_table, 3740 .probe = vmxnet3_probe_device, 3741 .remove = vmxnet3_remove_device, 3742 .shutdown = vmxnet3_shutdown_device, 3743 #ifdef CONFIG_PM 3744 .driver.pm = &vmxnet3_pm_ops, 3745 #endif 3746 }; 3747 3748 3749 static int __init 3750 vmxnet3_init_module(void) 3751 { 3752 pr_info("%s - version %s\n", VMXNET3_DRIVER_DESC, 3753 VMXNET3_DRIVER_VERSION_REPORT); 3754 return pci_register_driver(&vmxnet3_driver); 3755 } 3756 3757 module_init(vmxnet3_init_module); 3758 3759 3760 static void 3761 vmxnet3_exit_module(void) 3762 { 3763 pci_unregister_driver(&vmxnet3_driver); 3764 } 3765 3766 module_exit(vmxnet3_exit_module); 3767 3768 MODULE_AUTHOR("VMware, Inc."); 3769 MODULE_DESCRIPTION(VMXNET3_DRIVER_DESC); 3770 MODULE_LICENSE("GPL v2"); 3771 MODULE_VERSION(VMXNET3_DRIVER_VERSION_STRING); 3772