1 /* 2 * Linux driver for VMware's vmxnet3 ethernet NIC. 3 * 4 * Copyright (C) 2008-2009, VMware, Inc. All Rights Reserved. 5 * 6 * This program is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License as published by the 8 * Free Software Foundation; version 2 of the License and no later version. 9 * 10 * This program is distributed in the hope that it will be useful, but 11 * WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or 13 * NON INFRINGEMENT. See the GNU General Public License for more 14 * details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * The full GNU General Public License is included in this distribution in 21 * the file called "COPYING". 22 * 23 * Maintained by: Shreyas Bhatewara <pv-drivers@vmware.com> 24 * 25 */ 26 27 #include "vmxnet3_int.h" 28 29 char vmxnet3_driver_name[] = "vmxnet3"; 30 #define VMXNET3_DRIVER_DESC "VMware vmxnet3 virtual NIC driver" 31 32 33 /* 34 * PCI Device ID Table 35 * Last entry must be all 0s 36 */ 37 static const struct pci_device_id vmxnet3_pciid_table[] = { 38 {PCI_VDEVICE(VMWARE, PCI_DEVICE_ID_VMWARE_VMXNET3)}, 39 {0} 40 }; 41 42 MODULE_DEVICE_TABLE(pci, vmxnet3_pciid_table); 43 44 static atomic_t devices_found; 45 46 47 /* 48 * Enable/Disable the given intr 49 */ 50 static void 51 vmxnet3_enable_intr(struct vmxnet3_adapter *adapter, unsigned intr_idx) 52 { 53 VMXNET3_WRITE_BAR0_REG(adapter, VMXNET3_REG_IMR + intr_idx * 8, 0); 54 } 55 56 57 static void 58 vmxnet3_disable_intr(struct vmxnet3_adapter *adapter, unsigned intr_idx) 59 { 60 VMXNET3_WRITE_BAR0_REG(adapter, VMXNET3_REG_IMR + intr_idx * 8, 1); 61 } 62 63 64 /* 65 * Enable/Disable all intrs used by the device 66 */ 67 static void 68 vmxnet3_enable_all_intrs(struct vmxnet3_adapter *adapter) 69 { 70 int i; 71 72 for (i = 0; i < adapter->intr.num_intrs; i++) 73 vmxnet3_enable_intr(adapter, i); 74 } 75 76 77 static void 78 vmxnet3_disable_all_intrs(struct vmxnet3_adapter *adapter) 79 { 80 int i; 81 82 for (i = 0; i < adapter->intr.num_intrs; i++) 83 vmxnet3_disable_intr(adapter, i); 84 } 85 86 87 static void 88 vmxnet3_ack_events(struct vmxnet3_adapter *adapter, u32 events) 89 { 90 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_ECR, events); 91 } 92 93 94 static bool 95 vmxnet3_tq_stopped(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter) 96 { 97 return netif_queue_stopped(adapter->netdev); 98 } 99 100 101 static void 102 vmxnet3_tq_start(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter) 103 { 104 tq->stopped = false; 105 netif_start_queue(adapter->netdev); 106 } 107 108 109 static void 110 vmxnet3_tq_wake(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter) 111 { 112 tq->stopped = false; 113 netif_wake_queue(adapter->netdev); 114 } 115 116 117 static void 118 vmxnet3_tq_stop(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter) 119 { 120 tq->stopped = true; 121 tq->num_stop++; 122 netif_stop_queue(adapter->netdev); 123 } 124 125 126 /* 127 * Check the link state. This may start or stop the tx queue. 128 */ 129 static void 130 vmxnet3_check_link(struct vmxnet3_adapter *adapter) 131 { 132 u32 ret; 133 134 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_GET_LINK); 135 ret = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD); 136 adapter->link_speed = ret >> 16; 137 if (ret & 1) { /* Link is up. */ 138 printk(KERN_INFO "%s: NIC Link is Up %d Mbps\n", 139 adapter->netdev->name, adapter->link_speed); 140 if (!netif_carrier_ok(adapter->netdev)) 141 netif_carrier_on(adapter->netdev); 142 143 vmxnet3_tq_start(&adapter->tx_queue, adapter); 144 } else { 145 printk(KERN_INFO "%s: NIC Link is Down\n", 146 adapter->netdev->name); 147 if (netif_carrier_ok(adapter->netdev)) 148 netif_carrier_off(adapter->netdev); 149 150 vmxnet3_tq_stop(&adapter->tx_queue, adapter); 151 } 152 } 153 154 155 static void 156 vmxnet3_process_events(struct vmxnet3_adapter *adapter) 157 { 158 u32 events = adapter->shared->ecr; 159 if (!events) 160 return; 161 162 vmxnet3_ack_events(adapter, events); 163 164 /* Check if link state has changed */ 165 if (events & VMXNET3_ECR_LINK) 166 vmxnet3_check_link(adapter); 167 168 /* Check if there is an error on xmit/recv queues */ 169 if (events & (VMXNET3_ECR_TQERR | VMXNET3_ECR_RQERR)) { 170 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 171 VMXNET3_CMD_GET_QUEUE_STATUS); 172 173 if (adapter->tqd_start->status.stopped) { 174 printk(KERN_ERR "%s: tq error 0x%x\n", 175 adapter->netdev->name, 176 adapter->tqd_start->status.error); 177 } 178 if (adapter->rqd_start->status.stopped) { 179 printk(KERN_ERR "%s: rq error 0x%x\n", 180 adapter->netdev->name, 181 adapter->rqd_start->status.error); 182 } 183 184 schedule_work(&adapter->work); 185 } 186 } 187 188 189 static void 190 vmxnet3_unmap_tx_buf(struct vmxnet3_tx_buf_info *tbi, 191 struct pci_dev *pdev) 192 { 193 if (tbi->map_type == VMXNET3_MAP_SINGLE) 194 pci_unmap_single(pdev, tbi->dma_addr, tbi->len, 195 PCI_DMA_TODEVICE); 196 else if (tbi->map_type == VMXNET3_MAP_PAGE) 197 pci_unmap_page(pdev, tbi->dma_addr, tbi->len, 198 PCI_DMA_TODEVICE); 199 else 200 BUG_ON(tbi->map_type != VMXNET3_MAP_NONE); 201 202 tbi->map_type = VMXNET3_MAP_NONE; /* to help debugging */ 203 } 204 205 206 static int 207 vmxnet3_unmap_pkt(u32 eop_idx, struct vmxnet3_tx_queue *tq, 208 struct pci_dev *pdev, struct vmxnet3_adapter *adapter) 209 { 210 struct sk_buff *skb; 211 int entries = 0; 212 213 /* no out of order completion */ 214 BUG_ON(tq->buf_info[eop_idx].sop_idx != tq->tx_ring.next2comp); 215 BUG_ON(tq->tx_ring.base[eop_idx].txd.eop != 1); 216 217 skb = tq->buf_info[eop_idx].skb; 218 BUG_ON(skb == NULL); 219 tq->buf_info[eop_idx].skb = NULL; 220 221 VMXNET3_INC_RING_IDX_ONLY(eop_idx, tq->tx_ring.size); 222 223 while (tq->tx_ring.next2comp != eop_idx) { 224 vmxnet3_unmap_tx_buf(tq->buf_info + tq->tx_ring.next2comp, 225 pdev); 226 227 /* update next2comp w/o tx_lock. Since we are marking more, 228 * instead of less, tx ring entries avail, the worst case is 229 * that the tx routine incorrectly re-queues a pkt due to 230 * insufficient tx ring entries. 231 */ 232 vmxnet3_cmd_ring_adv_next2comp(&tq->tx_ring); 233 entries++; 234 } 235 236 dev_kfree_skb_any(skb); 237 return entries; 238 } 239 240 241 static int 242 vmxnet3_tq_tx_complete(struct vmxnet3_tx_queue *tq, 243 struct vmxnet3_adapter *adapter) 244 { 245 int completed = 0; 246 union Vmxnet3_GenericDesc *gdesc; 247 248 gdesc = tq->comp_ring.base + tq->comp_ring.next2proc; 249 while (gdesc->tcd.gen == tq->comp_ring.gen) { 250 completed += vmxnet3_unmap_pkt(gdesc->tcd.txdIdx, tq, 251 adapter->pdev, adapter); 252 253 vmxnet3_comp_ring_adv_next2proc(&tq->comp_ring); 254 gdesc = tq->comp_ring.base + tq->comp_ring.next2proc; 255 } 256 257 if (completed) { 258 spin_lock(&tq->tx_lock); 259 if (unlikely(vmxnet3_tq_stopped(tq, adapter) && 260 vmxnet3_cmd_ring_desc_avail(&tq->tx_ring) > 261 VMXNET3_WAKE_QUEUE_THRESHOLD(tq) && 262 netif_carrier_ok(adapter->netdev))) { 263 vmxnet3_tq_wake(tq, adapter); 264 } 265 spin_unlock(&tq->tx_lock); 266 } 267 return completed; 268 } 269 270 271 static void 272 vmxnet3_tq_cleanup(struct vmxnet3_tx_queue *tq, 273 struct vmxnet3_adapter *adapter) 274 { 275 int i; 276 277 while (tq->tx_ring.next2comp != tq->tx_ring.next2fill) { 278 struct vmxnet3_tx_buf_info *tbi; 279 union Vmxnet3_GenericDesc *gdesc; 280 281 tbi = tq->buf_info + tq->tx_ring.next2comp; 282 gdesc = tq->tx_ring.base + tq->tx_ring.next2comp; 283 284 vmxnet3_unmap_tx_buf(tbi, adapter->pdev); 285 if (tbi->skb) { 286 dev_kfree_skb_any(tbi->skb); 287 tbi->skb = NULL; 288 } 289 vmxnet3_cmd_ring_adv_next2comp(&tq->tx_ring); 290 } 291 292 /* sanity check, verify all buffers are indeed unmapped and freed */ 293 for (i = 0; i < tq->tx_ring.size; i++) { 294 BUG_ON(tq->buf_info[i].skb != NULL || 295 tq->buf_info[i].map_type != VMXNET3_MAP_NONE); 296 } 297 298 tq->tx_ring.gen = VMXNET3_INIT_GEN; 299 tq->tx_ring.next2fill = tq->tx_ring.next2comp = 0; 300 301 tq->comp_ring.gen = VMXNET3_INIT_GEN; 302 tq->comp_ring.next2proc = 0; 303 } 304 305 306 void 307 vmxnet3_tq_destroy(struct vmxnet3_tx_queue *tq, 308 struct vmxnet3_adapter *adapter) 309 { 310 if (tq->tx_ring.base) { 311 pci_free_consistent(adapter->pdev, tq->tx_ring.size * 312 sizeof(struct Vmxnet3_TxDesc), 313 tq->tx_ring.base, tq->tx_ring.basePA); 314 tq->tx_ring.base = NULL; 315 } 316 if (tq->data_ring.base) { 317 pci_free_consistent(adapter->pdev, tq->data_ring.size * 318 sizeof(struct Vmxnet3_TxDataDesc), 319 tq->data_ring.base, tq->data_ring.basePA); 320 tq->data_ring.base = NULL; 321 } 322 if (tq->comp_ring.base) { 323 pci_free_consistent(adapter->pdev, tq->comp_ring.size * 324 sizeof(struct Vmxnet3_TxCompDesc), 325 tq->comp_ring.base, tq->comp_ring.basePA); 326 tq->comp_ring.base = NULL; 327 } 328 kfree(tq->buf_info); 329 tq->buf_info = NULL; 330 } 331 332 333 static void 334 vmxnet3_tq_init(struct vmxnet3_tx_queue *tq, 335 struct vmxnet3_adapter *adapter) 336 { 337 int i; 338 339 /* reset the tx ring contents to 0 and reset the tx ring states */ 340 memset(tq->tx_ring.base, 0, tq->tx_ring.size * 341 sizeof(struct Vmxnet3_TxDesc)); 342 tq->tx_ring.next2fill = tq->tx_ring.next2comp = 0; 343 tq->tx_ring.gen = VMXNET3_INIT_GEN; 344 345 memset(tq->data_ring.base, 0, tq->data_ring.size * 346 sizeof(struct Vmxnet3_TxDataDesc)); 347 348 /* reset the tx comp ring contents to 0 and reset comp ring states */ 349 memset(tq->comp_ring.base, 0, tq->comp_ring.size * 350 sizeof(struct Vmxnet3_TxCompDesc)); 351 tq->comp_ring.next2proc = 0; 352 tq->comp_ring.gen = VMXNET3_INIT_GEN; 353 354 /* reset the bookkeeping data */ 355 memset(tq->buf_info, 0, sizeof(tq->buf_info[0]) * tq->tx_ring.size); 356 for (i = 0; i < tq->tx_ring.size; i++) 357 tq->buf_info[i].map_type = VMXNET3_MAP_NONE; 358 359 /* stats are not reset */ 360 } 361 362 363 static int 364 vmxnet3_tq_create(struct vmxnet3_tx_queue *tq, 365 struct vmxnet3_adapter *adapter) 366 { 367 BUG_ON(tq->tx_ring.base || tq->data_ring.base || 368 tq->comp_ring.base || tq->buf_info); 369 370 tq->tx_ring.base = pci_alloc_consistent(adapter->pdev, tq->tx_ring.size 371 * sizeof(struct Vmxnet3_TxDesc), 372 &tq->tx_ring.basePA); 373 if (!tq->tx_ring.base) { 374 printk(KERN_ERR "%s: failed to allocate tx ring\n", 375 adapter->netdev->name); 376 goto err; 377 } 378 379 tq->data_ring.base = pci_alloc_consistent(adapter->pdev, 380 tq->data_ring.size * 381 sizeof(struct Vmxnet3_TxDataDesc), 382 &tq->data_ring.basePA); 383 if (!tq->data_ring.base) { 384 printk(KERN_ERR "%s: failed to allocate data ring\n", 385 adapter->netdev->name); 386 goto err; 387 } 388 389 tq->comp_ring.base = pci_alloc_consistent(adapter->pdev, 390 tq->comp_ring.size * 391 sizeof(struct Vmxnet3_TxCompDesc), 392 &tq->comp_ring.basePA); 393 if (!tq->comp_ring.base) { 394 printk(KERN_ERR "%s: failed to allocate tx comp ring\n", 395 adapter->netdev->name); 396 goto err; 397 } 398 399 tq->buf_info = kcalloc(tq->tx_ring.size, sizeof(tq->buf_info[0]), 400 GFP_KERNEL); 401 if (!tq->buf_info) { 402 printk(KERN_ERR "%s: failed to allocate tx bufinfo\n", 403 adapter->netdev->name); 404 goto err; 405 } 406 407 return 0; 408 409 err: 410 vmxnet3_tq_destroy(tq, adapter); 411 return -ENOMEM; 412 } 413 414 415 /* 416 * starting from ring->next2fill, allocate rx buffers for the given ring 417 * of the rx queue and update the rx desc. stop after @num_to_alloc buffers 418 * are allocated or allocation fails 419 */ 420 421 static int 422 vmxnet3_rq_alloc_rx_buf(struct vmxnet3_rx_queue *rq, u32 ring_idx, 423 int num_to_alloc, struct vmxnet3_adapter *adapter) 424 { 425 int num_allocated = 0; 426 struct vmxnet3_rx_buf_info *rbi_base = rq->buf_info[ring_idx]; 427 struct vmxnet3_cmd_ring *ring = &rq->rx_ring[ring_idx]; 428 u32 val; 429 430 while (num_allocated < num_to_alloc) { 431 struct vmxnet3_rx_buf_info *rbi; 432 union Vmxnet3_GenericDesc *gd; 433 434 rbi = rbi_base + ring->next2fill; 435 gd = ring->base + ring->next2fill; 436 437 if (rbi->buf_type == VMXNET3_RX_BUF_SKB) { 438 if (rbi->skb == NULL) { 439 rbi->skb = dev_alloc_skb(rbi->len + 440 NET_IP_ALIGN); 441 if (unlikely(rbi->skb == NULL)) { 442 rq->stats.rx_buf_alloc_failure++; 443 break; 444 } 445 rbi->skb->dev = adapter->netdev; 446 447 skb_reserve(rbi->skb, NET_IP_ALIGN); 448 rbi->dma_addr = pci_map_single(adapter->pdev, 449 rbi->skb->data, rbi->len, 450 PCI_DMA_FROMDEVICE); 451 } else { 452 /* rx buffer skipped by the device */ 453 } 454 val = VMXNET3_RXD_BTYPE_HEAD << VMXNET3_RXD_BTYPE_SHIFT; 455 } else { 456 BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_PAGE || 457 rbi->len != PAGE_SIZE); 458 459 if (rbi->page == NULL) { 460 rbi->page = alloc_page(GFP_ATOMIC); 461 if (unlikely(rbi->page == NULL)) { 462 rq->stats.rx_buf_alloc_failure++; 463 break; 464 } 465 rbi->dma_addr = pci_map_page(adapter->pdev, 466 rbi->page, 0, PAGE_SIZE, 467 PCI_DMA_FROMDEVICE); 468 } else { 469 /* rx buffers skipped by the device */ 470 } 471 val = VMXNET3_RXD_BTYPE_BODY << VMXNET3_RXD_BTYPE_SHIFT; 472 } 473 474 BUG_ON(rbi->dma_addr == 0); 475 gd->rxd.addr = rbi->dma_addr; 476 gd->dword[2] = (ring->gen << VMXNET3_RXD_GEN_SHIFT) | val | 477 rbi->len; 478 479 num_allocated++; 480 vmxnet3_cmd_ring_adv_next2fill(ring); 481 } 482 rq->uncommitted[ring_idx] += num_allocated; 483 484 dev_dbg(&adapter->netdev->dev, 485 "alloc_rx_buf: %d allocated, next2fill %u, next2comp " 486 "%u, uncommited %u\n", num_allocated, ring->next2fill, 487 ring->next2comp, rq->uncommitted[ring_idx]); 488 489 /* so that the device can distinguish a full ring and an empty ring */ 490 BUG_ON(num_allocated != 0 && ring->next2fill == ring->next2comp); 491 492 return num_allocated; 493 } 494 495 496 static void 497 vmxnet3_append_frag(struct sk_buff *skb, struct Vmxnet3_RxCompDesc *rcd, 498 struct vmxnet3_rx_buf_info *rbi) 499 { 500 struct skb_frag_struct *frag = skb_shinfo(skb)->frags + 501 skb_shinfo(skb)->nr_frags; 502 503 BUG_ON(skb_shinfo(skb)->nr_frags >= MAX_SKB_FRAGS); 504 505 frag->page = rbi->page; 506 frag->page_offset = 0; 507 frag->size = rcd->len; 508 skb->data_len += frag->size; 509 skb_shinfo(skb)->nr_frags++; 510 } 511 512 513 static void 514 vmxnet3_map_pkt(struct sk_buff *skb, struct vmxnet3_tx_ctx *ctx, 515 struct vmxnet3_tx_queue *tq, struct pci_dev *pdev, 516 struct vmxnet3_adapter *adapter) 517 { 518 u32 dw2, len; 519 unsigned long buf_offset; 520 int i; 521 union Vmxnet3_GenericDesc *gdesc; 522 struct vmxnet3_tx_buf_info *tbi = NULL; 523 524 BUG_ON(ctx->copy_size > skb_headlen(skb)); 525 526 /* use the previous gen bit for the SOP desc */ 527 dw2 = (tq->tx_ring.gen ^ 0x1) << VMXNET3_TXD_GEN_SHIFT; 528 529 ctx->sop_txd = tq->tx_ring.base + tq->tx_ring.next2fill; 530 gdesc = ctx->sop_txd; /* both loops below can be skipped */ 531 532 /* no need to map the buffer if headers are copied */ 533 if (ctx->copy_size) { 534 ctx->sop_txd->txd.addr = tq->data_ring.basePA + 535 tq->tx_ring.next2fill * 536 sizeof(struct Vmxnet3_TxDataDesc); 537 ctx->sop_txd->dword[2] = dw2 | ctx->copy_size; 538 ctx->sop_txd->dword[3] = 0; 539 540 tbi = tq->buf_info + tq->tx_ring.next2fill; 541 tbi->map_type = VMXNET3_MAP_NONE; 542 543 dev_dbg(&adapter->netdev->dev, 544 "txd[%u]: 0x%Lx 0x%x 0x%x\n", 545 tq->tx_ring.next2fill, ctx->sop_txd->txd.addr, 546 ctx->sop_txd->dword[2], ctx->sop_txd->dword[3]); 547 vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring); 548 549 /* use the right gen for non-SOP desc */ 550 dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT; 551 } 552 553 /* linear part can use multiple tx desc if it's big */ 554 len = skb_headlen(skb) - ctx->copy_size; 555 buf_offset = ctx->copy_size; 556 while (len) { 557 u32 buf_size; 558 559 buf_size = len > VMXNET3_MAX_TX_BUF_SIZE ? 560 VMXNET3_MAX_TX_BUF_SIZE : len; 561 562 tbi = tq->buf_info + tq->tx_ring.next2fill; 563 tbi->map_type = VMXNET3_MAP_SINGLE; 564 tbi->dma_addr = pci_map_single(adapter->pdev, 565 skb->data + buf_offset, buf_size, 566 PCI_DMA_TODEVICE); 567 568 tbi->len = buf_size; /* this automatically convert 2^14 to 0 */ 569 570 gdesc = tq->tx_ring.base + tq->tx_ring.next2fill; 571 BUG_ON(gdesc->txd.gen == tq->tx_ring.gen); 572 573 gdesc->txd.addr = tbi->dma_addr; 574 gdesc->dword[2] = dw2 | buf_size; 575 gdesc->dword[3] = 0; 576 577 dev_dbg(&adapter->netdev->dev, 578 "txd[%u]: 0x%Lx 0x%x 0x%x\n", 579 tq->tx_ring.next2fill, gdesc->txd.addr, 580 gdesc->dword[2], gdesc->dword[3]); 581 vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring); 582 dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT; 583 584 len -= buf_size; 585 buf_offset += buf_size; 586 } 587 588 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 589 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i]; 590 591 tbi = tq->buf_info + tq->tx_ring.next2fill; 592 tbi->map_type = VMXNET3_MAP_PAGE; 593 tbi->dma_addr = pci_map_page(adapter->pdev, frag->page, 594 frag->page_offset, frag->size, 595 PCI_DMA_TODEVICE); 596 597 tbi->len = frag->size; 598 599 gdesc = tq->tx_ring.base + tq->tx_ring.next2fill; 600 BUG_ON(gdesc->txd.gen == tq->tx_ring.gen); 601 602 gdesc->txd.addr = tbi->dma_addr; 603 gdesc->dword[2] = dw2 | frag->size; 604 gdesc->dword[3] = 0; 605 606 dev_dbg(&adapter->netdev->dev, 607 "txd[%u]: 0x%llu %u %u\n", 608 tq->tx_ring.next2fill, gdesc->txd.addr, 609 gdesc->dword[2], gdesc->dword[3]); 610 vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring); 611 dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT; 612 } 613 614 ctx->eop_txd = gdesc; 615 616 /* set the last buf_info for the pkt */ 617 tbi->skb = skb; 618 tbi->sop_idx = ctx->sop_txd - tq->tx_ring.base; 619 } 620 621 622 /* 623 * parse and copy relevant protocol headers: 624 * For a tso pkt, relevant headers are L2/3/4 including options 625 * For a pkt requesting csum offloading, they are L2/3 and may include L4 626 * if it's a TCP/UDP pkt 627 * 628 * Returns: 629 * -1: error happens during parsing 630 * 0: protocol headers parsed, but too big to be copied 631 * 1: protocol headers parsed and copied 632 * 633 * Other effects: 634 * 1. related *ctx fields are updated. 635 * 2. ctx->copy_size is # of bytes copied 636 * 3. the portion copied is guaranteed to be in the linear part 637 * 638 */ 639 static int 640 vmxnet3_parse_and_copy_hdr(struct sk_buff *skb, struct vmxnet3_tx_queue *tq, 641 struct vmxnet3_tx_ctx *ctx, 642 struct vmxnet3_adapter *adapter) 643 { 644 struct Vmxnet3_TxDataDesc *tdd; 645 646 if (ctx->mss) { 647 ctx->eth_ip_hdr_size = skb_transport_offset(skb); 648 ctx->l4_hdr_size = ((struct tcphdr *) 649 skb_transport_header(skb))->doff * 4; 650 ctx->copy_size = ctx->eth_ip_hdr_size + ctx->l4_hdr_size; 651 } else { 652 unsigned int pull_size; 653 654 if (skb->ip_summed == CHECKSUM_PARTIAL) { 655 ctx->eth_ip_hdr_size = skb_transport_offset(skb); 656 657 if (ctx->ipv4) { 658 struct iphdr *iph = (struct iphdr *) 659 skb_network_header(skb); 660 if (iph->protocol == IPPROTO_TCP) { 661 pull_size = ctx->eth_ip_hdr_size + 662 sizeof(struct tcphdr); 663 664 if (unlikely(!pskb_may_pull(skb, 665 pull_size))) { 666 goto err; 667 } 668 ctx->l4_hdr_size = ((struct tcphdr *) 669 skb_transport_header(skb))->doff * 4; 670 } else if (iph->protocol == IPPROTO_UDP) { 671 ctx->l4_hdr_size = 672 sizeof(struct udphdr); 673 } else { 674 ctx->l4_hdr_size = 0; 675 } 676 } else { 677 /* for simplicity, don't copy L4 headers */ 678 ctx->l4_hdr_size = 0; 679 } 680 ctx->copy_size = ctx->eth_ip_hdr_size + 681 ctx->l4_hdr_size; 682 } else { 683 ctx->eth_ip_hdr_size = 0; 684 ctx->l4_hdr_size = 0; 685 /* copy as much as allowed */ 686 ctx->copy_size = min((unsigned int)VMXNET3_HDR_COPY_SIZE 687 , skb_headlen(skb)); 688 } 689 690 /* make sure headers are accessible directly */ 691 if (unlikely(!pskb_may_pull(skb, ctx->copy_size))) 692 goto err; 693 } 694 695 if (unlikely(ctx->copy_size > VMXNET3_HDR_COPY_SIZE)) { 696 tq->stats.oversized_hdr++; 697 ctx->copy_size = 0; 698 return 0; 699 } 700 701 tdd = tq->data_ring.base + tq->tx_ring.next2fill; 702 703 memcpy(tdd->data, skb->data, ctx->copy_size); 704 dev_dbg(&adapter->netdev->dev, 705 "copy %u bytes to dataRing[%u]\n", 706 ctx->copy_size, tq->tx_ring.next2fill); 707 return 1; 708 709 err: 710 return -1; 711 } 712 713 714 static void 715 vmxnet3_prepare_tso(struct sk_buff *skb, 716 struct vmxnet3_tx_ctx *ctx) 717 { 718 struct tcphdr *tcph = (struct tcphdr *)skb_transport_header(skb); 719 if (ctx->ipv4) { 720 struct iphdr *iph = (struct iphdr *)skb_network_header(skb); 721 iph->check = 0; 722 tcph->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr, 0, 723 IPPROTO_TCP, 0); 724 } else { 725 struct ipv6hdr *iph = (struct ipv6hdr *)skb_network_header(skb); 726 tcph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, 0, 727 IPPROTO_TCP, 0); 728 } 729 } 730 731 732 /* 733 * Transmits a pkt thru a given tq 734 * Returns: 735 * NETDEV_TX_OK: descriptors are setup successfully 736 * NETDEV_TX_OK: error occured, the pkt is dropped 737 * NETDEV_TX_BUSY: tx ring is full, queue is stopped 738 * 739 * Side-effects: 740 * 1. tx ring may be changed 741 * 2. tq stats may be updated accordingly 742 * 3. shared->txNumDeferred may be updated 743 */ 744 745 static int 746 vmxnet3_tq_xmit(struct sk_buff *skb, struct vmxnet3_tx_queue *tq, 747 struct vmxnet3_adapter *adapter, struct net_device *netdev) 748 { 749 int ret; 750 u32 count; 751 unsigned long flags; 752 struct vmxnet3_tx_ctx ctx; 753 union Vmxnet3_GenericDesc *gdesc; 754 755 /* conservatively estimate # of descriptors to use */ 756 count = VMXNET3_TXD_NEEDED(skb_headlen(skb)) + 757 skb_shinfo(skb)->nr_frags + 1; 758 759 ctx.ipv4 = (skb->protocol == __constant_ntohs(ETH_P_IP)); 760 761 ctx.mss = skb_shinfo(skb)->gso_size; 762 if (ctx.mss) { 763 if (skb_header_cloned(skb)) { 764 if (unlikely(pskb_expand_head(skb, 0, 0, 765 GFP_ATOMIC) != 0)) { 766 tq->stats.drop_tso++; 767 goto drop_pkt; 768 } 769 tq->stats.copy_skb_header++; 770 } 771 vmxnet3_prepare_tso(skb, &ctx); 772 } else { 773 if (unlikely(count > VMXNET3_MAX_TXD_PER_PKT)) { 774 775 /* non-tso pkts must not use more than 776 * VMXNET3_MAX_TXD_PER_PKT entries 777 */ 778 if (skb_linearize(skb) != 0) { 779 tq->stats.drop_too_many_frags++; 780 goto drop_pkt; 781 } 782 tq->stats.linearized++; 783 784 /* recalculate the # of descriptors to use */ 785 count = VMXNET3_TXD_NEEDED(skb_headlen(skb)) + 1; 786 } 787 } 788 789 ret = vmxnet3_parse_and_copy_hdr(skb, tq, &ctx, adapter); 790 if (ret >= 0) { 791 BUG_ON(ret <= 0 && ctx.copy_size != 0); 792 /* hdrs parsed, check against other limits */ 793 if (ctx.mss) { 794 if (unlikely(ctx.eth_ip_hdr_size + ctx.l4_hdr_size > 795 VMXNET3_MAX_TX_BUF_SIZE)) { 796 goto hdr_too_big; 797 } 798 } else { 799 if (skb->ip_summed == CHECKSUM_PARTIAL) { 800 if (unlikely(ctx.eth_ip_hdr_size + 801 skb->csum_offset > 802 VMXNET3_MAX_CSUM_OFFSET)) { 803 goto hdr_too_big; 804 } 805 } 806 } 807 } else { 808 tq->stats.drop_hdr_inspect_err++; 809 goto drop_pkt; 810 } 811 812 spin_lock_irqsave(&tq->tx_lock, flags); 813 814 if (count > vmxnet3_cmd_ring_desc_avail(&tq->tx_ring)) { 815 tq->stats.tx_ring_full++; 816 dev_dbg(&adapter->netdev->dev, 817 "tx queue stopped on %s, next2comp %u" 818 " next2fill %u\n", adapter->netdev->name, 819 tq->tx_ring.next2comp, tq->tx_ring.next2fill); 820 821 vmxnet3_tq_stop(tq, adapter); 822 spin_unlock_irqrestore(&tq->tx_lock, flags); 823 return NETDEV_TX_BUSY; 824 } 825 826 /* fill tx descs related to addr & len */ 827 vmxnet3_map_pkt(skb, &ctx, tq, adapter->pdev, adapter); 828 829 /* setup the EOP desc */ 830 ctx.eop_txd->dword[3] = VMXNET3_TXD_CQ | VMXNET3_TXD_EOP; 831 832 /* setup the SOP desc */ 833 gdesc = ctx.sop_txd; 834 if (ctx.mss) { 835 gdesc->txd.hlen = ctx.eth_ip_hdr_size + ctx.l4_hdr_size; 836 gdesc->txd.om = VMXNET3_OM_TSO; 837 gdesc->txd.msscof = ctx.mss; 838 tq->shared->txNumDeferred += (skb->len - gdesc->txd.hlen + 839 ctx.mss - 1) / ctx.mss; 840 } else { 841 if (skb->ip_summed == CHECKSUM_PARTIAL) { 842 gdesc->txd.hlen = ctx.eth_ip_hdr_size; 843 gdesc->txd.om = VMXNET3_OM_CSUM; 844 gdesc->txd.msscof = ctx.eth_ip_hdr_size + 845 skb->csum_offset; 846 } else { 847 gdesc->txd.om = 0; 848 gdesc->txd.msscof = 0; 849 } 850 tq->shared->txNumDeferred++; 851 } 852 853 if (vlan_tx_tag_present(skb)) { 854 gdesc->txd.ti = 1; 855 gdesc->txd.tci = vlan_tx_tag_get(skb); 856 } 857 858 wmb(); 859 860 /* finally flips the GEN bit of the SOP desc */ 861 gdesc->dword[2] ^= VMXNET3_TXD_GEN; 862 dev_dbg(&adapter->netdev->dev, 863 "txd[%u]: SOP 0x%Lx 0x%x 0x%x\n", 864 (u32)((union Vmxnet3_GenericDesc *)ctx.sop_txd - 865 tq->tx_ring.base), gdesc->txd.addr, gdesc->dword[2], 866 gdesc->dword[3]); 867 868 spin_unlock_irqrestore(&tq->tx_lock, flags); 869 870 if (tq->shared->txNumDeferred >= tq->shared->txThreshold) { 871 tq->shared->txNumDeferred = 0; 872 VMXNET3_WRITE_BAR0_REG(adapter, VMXNET3_REG_TXPROD, 873 tq->tx_ring.next2fill); 874 } 875 netdev->trans_start = jiffies; 876 877 return NETDEV_TX_OK; 878 879 hdr_too_big: 880 tq->stats.drop_oversized_hdr++; 881 drop_pkt: 882 tq->stats.drop_total++; 883 dev_kfree_skb(skb); 884 return NETDEV_TX_OK; 885 } 886 887 888 static netdev_tx_t 889 vmxnet3_xmit_frame(struct sk_buff *skb, struct net_device *netdev) 890 { 891 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 892 struct vmxnet3_tx_queue *tq = &adapter->tx_queue; 893 894 return vmxnet3_tq_xmit(skb, tq, adapter, netdev); 895 } 896 897 898 static void 899 vmxnet3_rx_csum(struct vmxnet3_adapter *adapter, 900 struct sk_buff *skb, 901 union Vmxnet3_GenericDesc *gdesc) 902 { 903 if (!gdesc->rcd.cnc && adapter->rxcsum) { 904 /* typical case: TCP/UDP over IP and both csums are correct */ 905 if ((gdesc->dword[3] & VMXNET3_RCD_CSUM_OK) == 906 VMXNET3_RCD_CSUM_OK) { 907 skb->ip_summed = CHECKSUM_UNNECESSARY; 908 BUG_ON(!(gdesc->rcd.tcp || gdesc->rcd.udp)); 909 BUG_ON(!(gdesc->rcd.v4 || gdesc->rcd.v6)); 910 BUG_ON(gdesc->rcd.frg); 911 } else { 912 if (gdesc->rcd.csum) { 913 skb->csum = htons(gdesc->rcd.csum); 914 skb->ip_summed = CHECKSUM_PARTIAL; 915 } else { 916 skb->ip_summed = CHECKSUM_NONE; 917 } 918 } 919 } else { 920 skb->ip_summed = CHECKSUM_NONE; 921 } 922 } 923 924 925 static void 926 vmxnet3_rx_error(struct vmxnet3_rx_queue *rq, struct Vmxnet3_RxCompDesc *rcd, 927 struct vmxnet3_rx_ctx *ctx, struct vmxnet3_adapter *adapter) 928 { 929 rq->stats.drop_err++; 930 if (!rcd->fcs) 931 rq->stats.drop_fcs++; 932 933 rq->stats.drop_total++; 934 935 /* 936 * We do not unmap and chain the rx buffer to the skb. 937 * We basically pretend this buffer is not used and will be recycled 938 * by vmxnet3_rq_alloc_rx_buf() 939 */ 940 941 /* 942 * ctx->skb may be NULL if this is the first and the only one 943 * desc for the pkt 944 */ 945 if (ctx->skb) 946 dev_kfree_skb_irq(ctx->skb); 947 948 ctx->skb = NULL; 949 } 950 951 952 static int 953 vmxnet3_rq_rx_complete(struct vmxnet3_rx_queue *rq, 954 struct vmxnet3_adapter *adapter, int quota) 955 { 956 static u32 rxprod_reg[2] = {VMXNET3_REG_RXPROD, VMXNET3_REG_RXPROD2}; 957 u32 num_rxd = 0; 958 struct Vmxnet3_RxCompDesc *rcd; 959 struct vmxnet3_rx_ctx *ctx = &rq->rx_ctx; 960 961 rcd = &rq->comp_ring.base[rq->comp_ring.next2proc].rcd; 962 while (rcd->gen == rq->comp_ring.gen) { 963 struct vmxnet3_rx_buf_info *rbi; 964 struct sk_buff *skb; 965 int num_to_alloc; 966 struct Vmxnet3_RxDesc *rxd; 967 u32 idx, ring_idx; 968 969 if (num_rxd >= quota) { 970 /* we may stop even before we see the EOP desc of 971 * the current pkt 972 */ 973 break; 974 } 975 num_rxd++; 976 977 idx = rcd->rxdIdx; 978 ring_idx = rcd->rqID == rq->qid ? 0 : 1; 979 980 rxd = &rq->rx_ring[ring_idx].base[idx].rxd; 981 rbi = rq->buf_info[ring_idx] + idx; 982 983 BUG_ON(rxd->addr != rbi->dma_addr || rxd->len != rbi->len); 984 985 if (unlikely(rcd->eop && rcd->err)) { 986 vmxnet3_rx_error(rq, rcd, ctx, adapter); 987 goto rcd_done; 988 } 989 990 if (rcd->sop) { /* first buf of the pkt */ 991 BUG_ON(rxd->btype != VMXNET3_RXD_BTYPE_HEAD || 992 rcd->rqID != rq->qid); 993 994 BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_SKB); 995 BUG_ON(ctx->skb != NULL || rbi->skb == NULL); 996 997 if (unlikely(rcd->len == 0)) { 998 /* Pretend the rx buffer is skipped. */ 999 BUG_ON(!(rcd->sop && rcd->eop)); 1000 dev_dbg(&adapter->netdev->dev, 1001 "rxRing[%u][%u] 0 length\n", 1002 ring_idx, idx); 1003 goto rcd_done; 1004 } 1005 1006 ctx->skb = rbi->skb; 1007 rbi->skb = NULL; 1008 1009 pci_unmap_single(adapter->pdev, rbi->dma_addr, rbi->len, 1010 PCI_DMA_FROMDEVICE); 1011 1012 skb_put(ctx->skb, rcd->len); 1013 } else { 1014 BUG_ON(ctx->skb == NULL); 1015 /* non SOP buffer must be type 1 in most cases */ 1016 if (rbi->buf_type == VMXNET3_RX_BUF_PAGE) { 1017 BUG_ON(rxd->btype != VMXNET3_RXD_BTYPE_BODY); 1018 1019 if (rcd->len) { 1020 pci_unmap_page(adapter->pdev, 1021 rbi->dma_addr, rbi->len, 1022 PCI_DMA_FROMDEVICE); 1023 1024 vmxnet3_append_frag(ctx->skb, rcd, rbi); 1025 rbi->page = NULL; 1026 } 1027 } else { 1028 /* 1029 * The only time a non-SOP buffer is type 0 is 1030 * when it's EOP and error flag is raised, which 1031 * has already been handled. 1032 */ 1033 BUG_ON(true); 1034 } 1035 } 1036 1037 skb = ctx->skb; 1038 if (rcd->eop) { 1039 skb->len += skb->data_len; 1040 skb->truesize += skb->data_len; 1041 1042 vmxnet3_rx_csum(adapter, skb, 1043 (union Vmxnet3_GenericDesc *)rcd); 1044 skb->protocol = eth_type_trans(skb, adapter->netdev); 1045 1046 if (unlikely(adapter->vlan_grp && rcd->ts)) { 1047 vlan_hwaccel_receive_skb(skb, 1048 adapter->vlan_grp, rcd->tci); 1049 } else { 1050 netif_receive_skb(skb); 1051 } 1052 1053 adapter->netdev->last_rx = jiffies; 1054 ctx->skb = NULL; 1055 } 1056 1057 rcd_done: 1058 /* device may skip some rx descs */ 1059 rq->rx_ring[ring_idx].next2comp = idx; 1060 VMXNET3_INC_RING_IDX_ONLY(rq->rx_ring[ring_idx].next2comp, 1061 rq->rx_ring[ring_idx].size); 1062 1063 /* refill rx buffers frequently to avoid starving the h/w */ 1064 num_to_alloc = vmxnet3_cmd_ring_desc_avail(rq->rx_ring + 1065 ring_idx); 1066 if (unlikely(num_to_alloc > VMXNET3_RX_ALLOC_THRESHOLD(rq, 1067 ring_idx, adapter))) { 1068 vmxnet3_rq_alloc_rx_buf(rq, ring_idx, num_to_alloc, 1069 adapter); 1070 1071 /* if needed, update the register */ 1072 if (unlikely(rq->shared->updateRxProd)) { 1073 VMXNET3_WRITE_BAR0_REG(adapter, 1074 rxprod_reg[ring_idx] + rq->qid * 8, 1075 rq->rx_ring[ring_idx].next2fill); 1076 rq->uncommitted[ring_idx] = 0; 1077 } 1078 } 1079 1080 vmxnet3_comp_ring_adv_next2proc(&rq->comp_ring); 1081 rcd = &rq->comp_ring.base[rq->comp_ring.next2proc].rcd; 1082 } 1083 1084 return num_rxd; 1085 } 1086 1087 1088 static void 1089 vmxnet3_rq_cleanup(struct vmxnet3_rx_queue *rq, 1090 struct vmxnet3_adapter *adapter) 1091 { 1092 u32 i, ring_idx; 1093 struct Vmxnet3_RxDesc *rxd; 1094 1095 for (ring_idx = 0; ring_idx < 2; ring_idx++) { 1096 for (i = 0; i < rq->rx_ring[ring_idx].size; i++) { 1097 rxd = &rq->rx_ring[ring_idx].base[i].rxd; 1098 1099 if (rxd->btype == VMXNET3_RXD_BTYPE_HEAD && 1100 rq->buf_info[ring_idx][i].skb) { 1101 pci_unmap_single(adapter->pdev, rxd->addr, 1102 rxd->len, PCI_DMA_FROMDEVICE); 1103 dev_kfree_skb(rq->buf_info[ring_idx][i].skb); 1104 rq->buf_info[ring_idx][i].skb = NULL; 1105 } else if (rxd->btype == VMXNET3_RXD_BTYPE_BODY && 1106 rq->buf_info[ring_idx][i].page) { 1107 pci_unmap_page(adapter->pdev, rxd->addr, 1108 rxd->len, PCI_DMA_FROMDEVICE); 1109 put_page(rq->buf_info[ring_idx][i].page); 1110 rq->buf_info[ring_idx][i].page = NULL; 1111 } 1112 } 1113 1114 rq->rx_ring[ring_idx].gen = VMXNET3_INIT_GEN; 1115 rq->rx_ring[ring_idx].next2fill = 1116 rq->rx_ring[ring_idx].next2comp = 0; 1117 rq->uncommitted[ring_idx] = 0; 1118 } 1119 1120 rq->comp_ring.gen = VMXNET3_INIT_GEN; 1121 rq->comp_ring.next2proc = 0; 1122 } 1123 1124 1125 void vmxnet3_rq_destroy(struct vmxnet3_rx_queue *rq, 1126 struct vmxnet3_adapter *adapter) 1127 { 1128 int i; 1129 int j; 1130 1131 /* all rx buffers must have already been freed */ 1132 for (i = 0; i < 2; i++) { 1133 if (rq->buf_info[i]) { 1134 for (j = 0; j < rq->rx_ring[i].size; j++) 1135 BUG_ON(rq->buf_info[i][j].page != NULL); 1136 } 1137 } 1138 1139 1140 kfree(rq->buf_info[0]); 1141 1142 for (i = 0; i < 2; i++) { 1143 if (rq->rx_ring[i].base) { 1144 pci_free_consistent(adapter->pdev, rq->rx_ring[i].size 1145 * sizeof(struct Vmxnet3_RxDesc), 1146 rq->rx_ring[i].base, 1147 rq->rx_ring[i].basePA); 1148 rq->rx_ring[i].base = NULL; 1149 } 1150 rq->buf_info[i] = NULL; 1151 } 1152 1153 if (rq->comp_ring.base) { 1154 pci_free_consistent(adapter->pdev, rq->comp_ring.size * 1155 sizeof(struct Vmxnet3_RxCompDesc), 1156 rq->comp_ring.base, rq->comp_ring.basePA); 1157 rq->comp_ring.base = NULL; 1158 } 1159 } 1160 1161 1162 static int 1163 vmxnet3_rq_init(struct vmxnet3_rx_queue *rq, 1164 struct vmxnet3_adapter *adapter) 1165 { 1166 int i; 1167 1168 /* initialize buf_info */ 1169 for (i = 0; i < rq->rx_ring[0].size; i++) { 1170 1171 /* 1st buf for a pkt is skbuff */ 1172 if (i % adapter->rx_buf_per_pkt == 0) { 1173 rq->buf_info[0][i].buf_type = VMXNET3_RX_BUF_SKB; 1174 rq->buf_info[0][i].len = adapter->skb_buf_size; 1175 } else { /* subsequent bufs for a pkt is frag */ 1176 rq->buf_info[0][i].buf_type = VMXNET3_RX_BUF_PAGE; 1177 rq->buf_info[0][i].len = PAGE_SIZE; 1178 } 1179 } 1180 for (i = 0; i < rq->rx_ring[1].size; i++) { 1181 rq->buf_info[1][i].buf_type = VMXNET3_RX_BUF_PAGE; 1182 rq->buf_info[1][i].len = PAGE_SIZE; 1183 } 1184 1185 /* reset internal state and allocate buffers for both rings */ 1186 for (i = 0; i < 2; i++) { 1187 rq->rx_ring[i].next2fill = rq->rx_ring[i].next2comp = 0; 1188 rq->uncommitted[i] = 0; 1189 1190 memset(rq->rx_ring[i].base, 0, rq->rx_ring[i].size * 1191 sizeof(struct Vmxnet3_RxDesc)); 1192 rq->rx_ring[i].gen = VMXNET3_INIT_GEN; 1193 } 1194 if (vmxnet3_rq_alloc_rx_buf(rq, 0, rq->rx_ring[0].size - 1, 1195 adapter) == 0) { 1196 /* at least has 1 rx buffer for the 1st ring */ 1197 return -ENOMEM; 1198 } 1199 vmxnet3_rq_alloc_rx_buf(rq, 1, rq->rx_ring[1].size - 1, adapter); 1200 1201 /* reset the comp ring */ 1202 rq->comp_ring.next2proc = 0; 1203 memset(rq->comp_ring.base, 0, rq->comp_ring.size * 1204 sizeof(struct Vmxnet3_RxCompDesc)); 1205 rq->comp_ring.gen = VMXNET3_INIT_GEN; 1206 1207 /* reset rxctx */ 1208 rq->rx_ctx.skb = NULL; 1209 1210 /* stats are not reset */ 1211 return 0; 1212 } 1213 1214 1215 static int 1216 vmxnet3_rq_create(struct vmxnet3_rx_queue *rq, struct vmxnet3_adapter *adapter) 1217 { 1218 int i; 1219 size_t sz; 1220 struct vmxnet3_rx_buf_info *bi; 1221 1222 for (i = 0; i < 2; i++) { 1223 1224 sz = rq->rx_ring[i].size * sizeof(struct Vmxnet3_RxDesc); 1225 rq->rx_ring[i].base = pci_alloc_consistent(adapter->pdev, sz, 1226 &rq->rx_ring[i].basePA); 1227 if (!rq->rx_ring[i].base) { 1228 printk(KERN_ERR "%s: failed to allocate rx ring %d\n", 1229 adapter->netdev->name, i); 1230 goto err; 1231 } 1232 } 1233 1234 sz = rq->comp_ring.size * sizeof(struct Vmxnet3_RxCompDesc); 1235 rq->comp_ring.base = pci_alloc_consistent(adapter->pdev, sz, 1236 &rq->comp_ring.basePA); 1237 if (!rq->comp_ring.base) { 1238 printk(KERN_ERR "%s: failed to allocate rx comp ring\n", 1239 adapter->netdev->name); 1240 goto err; 1241 } 1242 1243 sz = sizeof(struct vmxnet3_rx_buf_info) * (rq->rx_ring[0].size + 1244 rq->rx_ring[1].size); 1245 bi = kmalloc(sz, GFP_KERNEL); 1246 if (!bi) { 1247 printk(KERN_ERR "%s: failed to allocate rx bufinfo\n", 1248 adapter->netdev->name); 1249 goto err; 1250 } 1251 memset(bi, 0, sz); 1252 rq->buf_info[0] = bi; 1253 rq->buf_info[1] = bi + rq->rx_ring[0].size; 1254 1255 return 0; 1256 1257 err: 1258 vmxnet3_rq_destroy(rq, adapter); 1259 return -ENOMEM; 1260 } 1261 1262 1263 static int 1264 vmxnet3_do_poll(struct vmxnet3_adapter *adapter, int budget) 1265 { 1266 if (unlikely(adapter->shared->ecr)) 1267 vmxnet3_process_events(adapter); 1268 1269 vmxnet3_tq_tx_complete(&adapter->tx_queue, adapter); 1270 return vmxnet3_rq_rx_complete(&adapter->rx_queue, adapter, budget); 1271 } 1272 1273 1274 static int 1275 vmxnet3_poll(struct napi_struct *napi, int budget) 1276 { 1277 struct vmxnet3_adapter *adapter = container_of(napi, 1278 struct vmxnet3_adapter, napi); 1279 int rxd_done; 1280 1281 rxd_done = vmxnet3_do_poll(adapter, budget); 1282 1283 if (rxd_done < budget) { 1284 napi_complete(napi); 1285 vmxnet3_enable_intr(adapter, 0); 1286 } 1287 return rxd_done; 1288 } 1289 1290 1291 /* Interrupt handler for vmxnet3 */ 1292 static irqreturn_t 1293 vmxnet3_intr(int irq, void *dev_id) 1294 { 1295 struct net_device *dev = dev_id; 1296 struct vmxnet3_adapter *adapter = netdev_priv(dev); 1297 1298 if (unlikely(adapter->intr.type == VMXNET3_IT_INTX)) { 1299 u32 icr = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_ICR); 1300 if (unlikely(icr == 0)) 1301 /* not ours */ 1302 return IRQ_NONE; 1303 } 1304 1305 1306 /* disable intr if needed */ 1307 if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE) 1308 vmxnet3_disable_intr(adapter, 0); 1309 1310 napi_schedule(&adapter->napi); 1311 1312 return IRQ_HANDLED; 1313 } 1314 1315 #ifdef CONFIG_NET_POLL_CONTROLLER 1316 1317 1318 /* netpoll callback. */ 1319 static void 1320 vmxnet3_netpoll(struct net_device *netdev) 1321 { 1322 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 1323 int irq; 1324 1325 #ifdef CONFIG_PCI_MSI 1326 if (adapter->intr.type == VMXNET3_IT_MSIX) 1327 irq = adapter->intr.msix_entries[0].vector; 1328 else 1329 #endif 1330 irq = adapter->pdev->irq; 1331 1332 disable_irq(irq); 1333 vmxnet3_intr(irq, netdev); 1334 enable_irq(irq); 1335 } 1336 #endif 1337 1338 static int 1339 vmxnet3_request_irqs(struct vmxnet3_adapter *adapter) 1340 { 1341 int err; 1342 1343 #ifdef CONFIG_PCI_MSI 1344 if (adapter->intr.type == VMXNET3_IT_MSIX) { 1345 /* we only use 1 MSI-X vector */ 1346 err = request_irq(adapter->intr.msix_entries[0].vector, 1347 vmxnet3_intr, 0, adapter->netdev->name, 1348 adapter->netdev); 1349 } else 1350 #endif 1351 if (adapter->intr.type == VMXNET3_IT_MSI) { 1352 err = request_irq(adapter->pdev->irq, vmxnet3_intr, 0, 1353 adapter->netdev->name, adapter->netdev); 1354 } else { 1355 err = request_irq(adapter->pdev->irq, vmxnet3_intr, 1356 IRQF_SHARED, adapter->netdev->name, 1357 adapter->netdev); 1358 } 1359 1360 if (err) 1361 printk(KERN_ERR "Failed to request irq %s (intr type:%d), error" 1362 ":%d\n", adapter->netdev->name, adapter->intr.type, err); 1363 1364 1365 if (!err) { 1366 int i; 1367 /* init our intr settings */ 1368 for (i = 0; i < adapter->intr.num_intrs; i++) 1369 adapter->intr.mod_levels[i] = UPT1_IML_ADAPTIVE; 1370 1371 /* next setup intr index for all intr sources */ 1372 adapter->tx_queue.comp_ring.intr_idx = 0; 1373 adapter->rx_queue.comp_ring.intr_idx = 0; 1374 adapter->intr.event_intr_idx = 0; 1375 1376 printk(KERN_INFO "%s: intr type %u, mode %u, %u vectors " 1377 "allocated\n", adapter->netdev->name, adapter->intr.type, 1378 adapter->intr.mask_mode, adapter->intr.num_intrs); 1379 } 1380 1381 return err; 1382 } 1383 1384 1385 static void 1386 vmxnet3_free_irqs(struct vmxnet3_adapter *adapter) 1387 { 1388 BUG_ON(adapter->intr.type == VMXNET3_IT_AUTO || 1389 adapter->intr.num_intrs <= 0); 1390 1391 switch (adapter->intr.type) { 1392 #ifdef CONFIG_PCI_MSI 1393 case VMXNET3_IT_MSIX: 1394 { 1395 int i; 1396 1397 for (i = 0; i < adapter->intr.num_intrs; i++) 1398 free_irq(adapter->intr.msix_entries[i].vector, 1399 adapter->netdev); 1400 break; 1401 } 1402 #endif 1403 case VMXNET3_IT_MSI: 1404 free_irq(adapter->pdev->irq, adapter->netdev); 1405 break; 1406 case VMXNET3_IT_INTX: 1407 free_irq(adapter->pdev->irq, adapter->netdev); 1408 break; 1409 default: 1410 BUG_ON(true); 1411 } 1412 } 1413 1414 1415 static void 1416 vmxnet3_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp) 1417 { 1418 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 1419 struct Vmxnet3_DriverShared *shared = adapter->shared; 1420 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable; 1421 1422 if (grp) { 1423 /* add vlan rx stripping. */ 1424 if (adapter->netdev->features & NETIF_F_HW_VLAN_RX) { 1425 int i; 1426 struct Vmxnet3_DSDevRead *devRead = &shared->devRead; 1427 adapter->vlan_grp = grp; 1428 1429 /* update FEATURES to device */ 1430 devRead->misc.uptFeatures |= UPT1_F_RXVLAN; 1431 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 1432 VMXNET3_CMD_UPDATE_FEATURE); 1433 /* 1434 * Clear entire vfTable; then enable untagged pkts. 1435 * Note: setting one entry in vfTable to non-zero turns 1436 * on VLAN rx filtering. 1437 */ 1438 for (i = 0; i < VMXNET3_VFT_SIZE; i++) 1439 vfTable[i] = 0; 1440 1441 VMXNET3_SET_VFTABLE_ENTRY(vfTable, 0); 1442 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 1443 VMXNET3_CMD_UPDATE_VLAN_FILTERS); 1444 } else { 1445 printk(KERN_ERR "%s: vlan_rx_register when device has " 1446 "no NETIF_F_HW_VLAN_RX\n", netdev->name); 1447 } 1448 } else { 1449 /* remove vlan rx stripping. */ 1450 struct Vmxnet3_DSDevRead *devRead = &shared->devRead; 1451 adapter->vlan_grp = NULL; 1452 1453 if (devRead->misc.uptFeatures & UPT1_F_RXVLAN) { 1454 int i; 1455 1456 for (i = 0; i < VMXNET3_VFT_SIZE; i++) { 1457 /* clear entire vfTable; this also disables 1458 * VLAN rx filtering 1459 */ 1460 vfTable[i] = 0; 1461 } 1462 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 1463 VMXNET3_CMD_UPDATE_VLAN_FILTERS); 1464 1465 /* update FEATURES to device */ 1466 devRead->misc.uptFeatures &= ~UPT1_F_RXVLAN; 1467 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 1468 VMXNET3_CMD_UPDATE_FEATURE); 1469 } 1470 } 1471 } 1472 1473 1474 static void 1475 vmxnet3_restore_vlan(struct vmxnet3_adapter *adapter) 1476 { 1477 if (adapter->vlan_grp) { 1478 u16 vid; 1479 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable; 1480 bool activeVlan = false; 1481 1482 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) { 1483 if (vlan_group_get_device(adapter->vlan_grp, vid)) { 1484 VMXNET3_SET_VFTABLE_ENTRY(vfTable, vid); 1485 activeVlan = true; 1486 } 1487 } 1488 if (activeVlan) { 1489 /* continue to allow untagged pkts */ 1490 VMXNET3_SET_VFTABLE_ENTRY(vfTable, 0); 1491 } 1492 } 1493 } 1494 1495 1496 static void 1497 vmxnet3_vlan_rx_add_vid(struct net_device *netdev, u16 vid) 1498 { 1499 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 1500 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable; 1501 1502 VMXNET3_SET_VFTABLE_ENTRY(vfTable, vid); 1503 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 1504 VMXNET3_CMD_UPDATE_VLAN_FILTERS); 1505 } 1506 1507 1508 static void 1509 vmxnet3_vlan_rx_kill_vid(struct net_device *netdev, u16 vid) 1510 { 1511 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 1512 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable; 1513 1514 VMXNET3_CLEAR_VFTABLE_ENTRY(vfTable, vid); 1515 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 1516 VMXNET3_CMD_UPDATE_VLAN_FILTERS); 1517 } 1518 1519 1520 static u8 * 1521 vmxnet3_copy_mc(struct net_device *netdev) 1522 { 1523 u8 *buf = NULL; 1524 u32 sz = netdev->mc_count * ETH_ALEN; 1525 1526 /* struct Vmxnet3_RxFilterConf.mfTableLen is u16. */ 1527 if (sz <= 0xffff) { 1528 /* We may be called with BH disabled */ 1529 buf = kmalloc(sz, GFP_ATOMIC); 1530 if (buf) { 1531 int i; 1532 struct dev_mc_list *mc = netdev->mc_list; 1533 1534 for (i = 0; i < netdev->mc_count; i++) { 1535 BUG_ON(!mc); 1536 memcpy(buf + i * ETH_ALEN, mc->dmi_addr, 1537 ETH_ALEN); 1538 mc = mc->next; 1539 } 1540 } 1541 } 1542 return buf; 1543 } 1544 1545 1546 static void 1547 vmxnet3_set_mc(struct net_device *netdev) 1548 { 1549 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 1550 struct Vmxnet3_RxFilterConf *rxConf = 1551 &adapter->shared->devRead.rxFilterConf; 1552 u8 *new_table = NULL; 1553 u32 new_mode = VMXNET3_RXM_UCAST; 1554 1555 if (netdev->flags & IFF_PROMISC) 1556 new_mode |= VMXNET3_RXM_PROMISC; 1557 1558 if (netdev->flags & IFF_BROADCAST) 1559 new_mode |= VMXNET3_RXM_BCAST; 1560 1561 if (netdev->flags & IFF_ALLMULTI) 1562 new_mode |= VMXNET3_RXM_ALL_MULTI; 1563 else 1564 if (netdev->mc_count > 0) { 1565 new_table = vmxnet3_copy_mc(netdev); 1566 if (new_table) { 1567 new_mode |= VMXNET3_RXM_MCAST; 1568 rxConf->mfTableLen = netdev->mc_count * 1569 ETH_ALEN; 1570 rxConf->mfTablePA = virt_to_phys(new_table); 1571 } else { 1572 printk(KERN_INFO "%s: failed to copy mcast list" 1573 ", setting ALL_MULTI\n", netdev->name); 1574 new_mode |= VMXNET3_RXM_ALL_MULTI; 1575 } 1576 } 1577 1578 1579 if (!(new_mode & VMXNET3_RXM_MCAST)) { 1580 rxConf->mfTableLen = 0; 1581 rxConf->mfTablePA = 0; 1582 } 1583 1584 if (new_mode != rxConf->rxMode) { 1585 rxConf->rxMode = new_mode; 1586 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 1587 VMXNET3_CMD_UPDATE_RX_MODE); 1588 } 1589 1590 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 1591 VMXNET3_CMD_UPDATE_MAC_FILTERS); 1592 1593 kfree(new_table); 1594 } 1595 1596 1597 /* 1598 * Set up driver_shared based on settings in adapter. 1599 */ 1600 1601 static void 1602 vmxnet3_setup_driver_shared(struct vmxnet3_adapter *adapter) 1603 { 1604 struct Vmxnet3_DriverShared *shared = adapter->shared; 1605 struct Vmxnet3_DSDevRead *devRead = &shared->devRead; 1606 struct Vmxnet3_TxQueueConf *tqc; 1607 struct Vmxnet3_RxQueueConf *rqc; 1608 int i; 1609 1610 memset(shared, 0, sizeof(*shared)); 1611 1612 /* driver settings */ 1613 shared->magic = VMXNET3_REV1_MAGIC; 1614 devRead->misc.driverInfo.version = VMXNET3_DRIVER_VERSION_NUM; 1615 devRead->misc.driverInfo.gos.gosBits = (sizeof(void *) == 4 ? 1616 VMXNET3_GOS_BITS_32 : VMXNET3_GOS_BITS_64); 1617 devRead->misc.driverInfo.gos.gosType = VMXNET3_GOS_TYPE_LINUX; 1618 devRead->misc.driverInfo.vmxnet3RevSpt = 1; 1619 devRead->misc.driverInfo.uptVerSpt = 1; 1620 1621 devRead->misc.ddPA = virt_to_phys(adapter); 1622 devRead->misc.ddLen = sizeof(struct vmxnet3_adapter); 1623 1624 /* set up feature flags */ 1625 if (adapter->rxcsum) 1626 devRead->misc.uptFeatures |= UPT1_F_RXCSUM; 1627 1628 if (adapter->lro) { 1629 devRead->misc.uptFeatures |= UPT1_F_LRO; 1630 devRead->misc.maxNumRxSG = 1 + MAX_SKB_FRAGS; 1631 } 1632 if ((adapter->netdev->features & NETIF_F_HW_VLAN_RX) 1633 && adapter->vlan_grp) { 1634 devRead->misc.uptFeatures |= UPT1_F_RXVLAN; 1635 } 1636 1637 devRead->misc.mtu = adapter->netdev->mtu; 1638 devRead->misc.queueDescPA = adapter->queue_desc_pa; 1639 devRead->misc.queueDescLen = sizeof(struct Vmxnet3_TxQueueDesc) + 1640 sizeof(struct Vmxnet3_RxQueueDesc); 1641 1642 /* tx queue settings */ 1643 BUG_ON(adapter->tx_queue.tx_ring.base == NULL); 1644 1645 devRead->misc.numTxQueues = 1; 1646 tqc = &adapter->tqd_start->conf; 1647 tqc->txRingBasePA = adapter->tx_queue.tx_ring.basePA; 1648 tqc->dataRingBasePA = adapter->tx_queue.data_ring.basePA; 1649 tqc->compRingBasePA = adapter->tx_queue.comp_ring.basePA; 1650 tqc->ddPA = virt_to_phys(adapter->tx_queue.buf_info); 1651 tqc->txRingSize = adapter->tx_queue.tx_ring.size; 1652 tqc->dataRingSize = adapter->tx_queue.data_ring.size; 1653 tqc->compRingSize = adapter->tx_queue.comp_ring.size; 1654 tqc->ddLen = sizeof(struct vmxnet3_tx_buf_info) * 1655 tqc->txRingSize; 1656 tqc->intrIdx = adapter->tx_queue.comp_ring.intr_idx; 1657 1658 /* rx queue settings */ 1659 devRead->misc.numRxQueues = 1; 1660 rqc = &adapter->rqd_start->conf; 1661 rqc->rxRingBasePA[0] = adapter->rx_queue.rx_ring[0].basePA; 1662 rqc->rxRingBasePA[1] = adapter->rx_queue.rx_ring[1].basePA; 1663 rqc->compRingBasePA = adapter->rx_queue.comp_ring.basePA; 1664 rqc->ddPA = virt_to_phys(adapter->rx_queue.buf_info); 1665 rqc->rxRingSize[0] = adapter->rx_queue.rx_ring[0].size; 1666 rqc->rxRingSize[1] = adapter->rx_queue.rx_ring[1].size; 1667 rqc->compRingSize = adapter->rx_queue.comp_ring.size; 1668 rqc->ddLen = sizeof(struct vmxnet3_rx_buf_info) * 1669 (rqc->rxRingSize[0] + rqc->rxRingSize[1]); 1670 rqc->intrIdx = adapter->rx_queue.comp_ring.intr_idx; 1671 1672 /* intr settings */ 1673 devRead->intrConf.autoMask = adapter->intr.mask_mode == 1674 VMXNET3_IMM_AUTO; 1675 devRead->intrConf.numIntrs = adapter->intr.num_intrs; 1676 for (i = 0; i < adapter->intr.num_intrs; i++) 1677 devRead->intrConf.modLevels[i] = adapter->intr.mod_levels[i]; 1678 1679 devRead->intrConf.eventIntrIdx = adapter->intr.event_intr_idx; 1680 1681 /* rx filter settings */ 1682 devRead->rxFilterConf.rxMode = 0; 1683 vmxnet3_restore_vlan(adapter); 1684 /* the rest are already zeroed */ 1685 } 1686 1687 1688 int 1689 vmxnet3_activate_dev(struct vmxnet3_adapter *adapter) 1690 { 1691 int err; 1692 u32 ret; 1693 1694 dev_dbg(&adapter->netdev->dev, 1695 "%s: skb_buf_size %d, rx_buf_per_pkt %d, ring sizes" 1696 " %u %u %u\n", adapter->netdev->name, adapter->skb_buf_size, 1697 adapter->rx_buf_per_pkt, adapter->tx_queue.tx_ring.size, 1698 adapter->rx_queue.rx_ring[0].size, 1699 adapter->rx_queue.rx_ring[1].size); 1700 1701 vmxnet3_tq_init(&adapter->tx_queue, adapter); 1702 err = vmxnet3_rq_init(&adapter->rx_queue, adapter); 1703 if (err) { 1704 printk(KERN_ERR "Failed to init rx queue for %s: error %d\n", 1705 adapter->netdev->name, err); 1706 goto rq_err; 1707 } 1708 1709 err = vmxnet3_request_irqs(adapter); 1710 if (err) { 1711 printk(KERN_ERR "Failed to setup irq for %s: error %d\n", 1712 adapter->netdev->name, err); 1713 goto irq_err; 1714 } 1715 1716 vmxnet3_setup_driver_shared(adapter); 1717 1718 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAL, 1719 VMXNET3_GET_ADDR_LO(adapter->shared_pa)); 1720 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAH, 1721 VMXNET3_GET_ADDR_HI(adapter->shared_pa)); 1722 1723 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 1724 VMXNET3_CMD_ACTIVATE_DEV); 1725 ret = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD); 1726 1727 if (ret != 0) { 1728 printk(KERN_ERR "Failed to activate dev %s: error %u\n", 1729 adapter->netdev->name, ret); 1730 err = -EINVAL; 1731 goto activate_err; 1732 } 1733 VMXNET3_WRITE_BAR0_REG(adapter, VMXNET3_REG_RXPROD, 1734 adapter->rx_queue.rx_ring[0].next2fill); 1735 VMXNET3_WRITE_BAR0_REG(adapter, VMXNET3_REG_RXPROD2, 1736 adapter->rx_queue.rx_ring[1].next2fill); 1737 1738 /* Apply the rx filter settins last. */ 1739 vmxnet3_set_mc(adapter->netdev); 1740 1741 /* 1742 * Check link state when first activating device. It will start the 1743 * tx queue if the link is up. 1744 */ 1745 vmxnet3_check_link(adapter); 1746 1747 napi_enable(&adapter->napi); 1748 vmxnet3_enable_all_intrs(adapter); 1749 clear_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state); 1750 return 0; 1751 1752 activate_err: 1753 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAL, 0); 1754 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAH, 0); 1755 vmxnet3_free_irqs(adapter); 1756 irq_err: 1757 rq_err: 1758 /* free up buffers we allocated */ 1759 vmxnet3_rq_cleanup(&adapter->rx_queue, adapter); 1760 return err; 1761 } 1762 1763 1764 void 1765 vmxnet3_reset_dev(struct vmxnet3_adapter *adapter) 1766 { 1767 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_RESET_DEV); 1768 } 1769 1770 1771 int 1772 vmxnet3_quiesce_dev(struct vmxnet3_adapter *adapter) 1773 { 1774 if (test_and_set_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state)) 1775 return 0; 1776 1777 1778 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 1779 VMXNET3_CMD_QUIESCE_DEV); 1780 vmxnet3_disable_all_intrs(adapter); 1781 1782 napi_disable(&adapter->napi); 1783 netif_tx_disable(adapter->netdev); 1784 adapter->link_speed = 0; 1785 netif_carrier_off(adapter->netdev); 1786 1787 vmxnet3_tq_cleanup(&adapter->tx_queue, adapter); 1788 vmxnet3_rq_cleanup(&adapter->rx_queue, adapter); 1789 vmxnet3_free_irqs(adapter); 1790 return 0; 1791 } 1792 1793 1794 static void 1795 vmxnet3_write_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac) 1796 { 1797 u32 tmp; 1798 1799 tmp = *(u32 *)mac; 1800 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_MACL, tmp); 1801 1802 tmp = (mac[5] << 8) | mac[4]; 1803 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_MACH, tmp); 1804 } 1805 1806 1807 static int 1808 vmxnet3_set_mac_addr(struct net_device *netdev, void *p) 1809 { 1810 struct sockaddr *addr = p; 1811 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 1812 1813 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); 1814 vmxnet3_write_mac_addr(adapter, addr->sa_data); 1815 1816 return 0; 1817 } 1818 1819 1820 /* ==================== initialization and cleanup routines ============ */ 1821 1822 static int 1823 vmxnet3_alloc_pci_resources(struct vmxnet3_adapter *adapter, bool *dma64) 1824 { 1825 int err; 1826 unsigned long mmio_start, mmio_len; 1827 struct pci_dev *pdev = adapter->pdev; 1828 1829 err = pci_enable_device(pdev); 1830 if (err) { 1831 printk(KERN_ERR "Failed to enable adapter %s: error %d\n", 1832 pci_name(pdev), err); 1833 return err; 1834 } 1835 1836 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) == 0) { 1837 if (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)) != 0) { 1838 printk(KERN_ERR "pci_set_consistent_dma_mask failed " 1839 "for adapter %s\n", pci_name(pdev)); 1840 err = -EIO; 1841 goto err_set_mask; 1842 } 1843 *dma64 = true; 1844 } else { 1845 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) { 1846 printk(KERN_ERR "pci_set_dma_mask failed for adapter " 1847 "%s\n", pci_name(pdev)); 1848 err = -EIO; 1849 goto err_set_mask; 1850 } 1851 *dma64 = false; 1852 } 1853 1854 err = pci_request_selected_regions(pdev, (1 << 2) - 1, 1855 vmxnet3_driver_name); 1856 if (err) { 1857 printk(KERN_ERR "Failed to request region for adapter %s: " 1858 "error %d\n", pci_name(pdev), err); 1859 goto err_set_mask; 1860 } 1861 1862 pci_set_master(pdev); 1863 1864 mmio_start = pci_resource_start(pdev, 0); 1865 mmio_len = pci_resource_len(pdev, 0); 1866 adapter->hw_addr0 = ioremap(mmio_start, mmio_len); 1867 if (!adapter->hw_addr0) { 1868 printk(KERN_ERR "Failed to map bar0 for adapter %s\n", 1869 pci_name(pdev)); 1870 err = -EIO; 1871 goto err_ioremap; 1872 } 1873 1874 mmio_start = pci_resource_start(pdev, 1); 1875 mmio_len = pci_resource_len(pdev, 1); 1876 adapter->hw_addr1 = ioremap(mmio_start, mmio_len); 1877 if (!adapter->hw_addr1) { 1878 printk(KERN_ERR "Failed to map bar1 for adapter %s\n", 1879 pci_name(pdev)); 1880 err = -EIO; 1881 goto err_bar1; 1882 } 1883 return 0; 1884 1885 err_bar1: 1886 iounmap(adapter->hw_addr0); 1887 err_ioremap: 1888 pci_release_selected_regions(pdev, (1 << 2) - 1); 1889 err_set_mask: 1890 pci_disable_device(pdev); 1891 return err; 1892 } 1893 1894 1895 static void 1896 vmxnet3_free_pci_resources(struct vmxnet3_adapter *adapter) 1897 { 1898 BUG_ON(!adapter->pdev); 1899 1900 iounmap(adapter->hw_addr0); 1901 iounmap(adapter->hw_addr1); 1902 pci_release_selected_regions(adapter->pdev, (1 << 2) - 1); 1903 pci_disable_device(adapter->pdev); 1904 } 1905 1906 1907 static void 1908 vmxnet3_adjust_rx_ring_size(struct vmxnet3_adapter *adapter) 1909 { 1910 size_t sz; 1911 1912 if (adapter->netdev->mtu <= VMXNET3_MAX_SKB_BUF_SIZE - 1913 VMXNET3_MAX_ETH_HDR_SIZE) { 1914 adapter->skb_buf_size = adapter->netdev->mtu + 1915 VMXNET3_MAX_ETH_HDR_SIZE; 1916 if (adapter->skb_buf_size < VMXNET3_MIN_T0_BUF_SIZE) 1917 adapter->skb_buf_size = VMXNET3_MIN_T0_BUF_SIZE; 1918 1919 adapter->rx_buf_per_pkt = 1; 1920 } else { 1921 adapter->skb_buf_size = VMXNET3_MAX_SKB_BUF_SIZE; 1922 sz = adapter->netdev->mtu - VMXNET3_MAX_SKB_BUF_SIZE + 1923 VMXNET3_MAX_ETH_HDR_SIZE; 1924 adapter->rx_buf_per_pkt = 1 + (sz + PAGE_SIZE - 1) / PAGE_SIZE; 1925 } 1926 1927 /* 1928 * for simplicity, force the ring0 size to be a multiple of 1929 * rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN 1930 */ 1931 sz = adapter->rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN; 1932 adapter->rx_queue.rx_ring[0].size = (adapter->rx_queue.rx_ring[0].size + 1933 sz - 1) / sz * sz; 1934 adapter->rx_queue.rx_ring[0].size = min_t(u32, 1935 adapter->rx_queue.rx_ring[0].size, 1936 VMXNET3_RX_RING_MAX_SIZE / sz * sz); 1937 } 1938 1939 1940 int 1941 vmxnet3_create_queues(struct vmxnet3_adapter *adapter, u32 tx_ring_size, 1942 u32 rx_ring_size, u32 rx_ring2_size) 1943 { 1944 int err; 1945 1946 adapter->tx_queue.tx_ring.size = tx_ring_size; 1947 adapter->tx_queue.data_ring.size = tx_ring_size; 1948 adapter->tx_queue.comp_ring.size = tx_ring_size; 1949 adapter->tx_queue.shared = &adapter->tqd_start->ctrl; 1950 adapter->tx_queue.stopped = true; 1951 err = vmxnet3_tq_create(&adapter->tx_queue, adapter); 1952 if (err) 1953 return err; 1954 1955 adapter->rx_queue.rx_ring[0].size = rx_ring_size; 1956 adapter->rx_queue.rx_ring[1].size = rx_ring2_size; 1957 vmxnet3_adjust_rx_ring_size(adapter); 1958 adapter->rx_queue.comp_ring.size = adapter->rx_queue.rx_ring[0].size + 1959 adapter->rx_queue.rx_ring[1].size; 1960 adapter->rx_queue.qid = 0; 1961 adapter->rx_queue.qid2 = 1; 1962 adapter->rx_queue.shared = &adapter->rqd_start->ctrl; 1963 err = vmxnet3_rq_create(&adapter->rx_queue, adapter); 1964 if (err) 1965 vmxnet3_tq_destroy(&adapter->tx_queue, adapter); 1966 1967 return err; 1968 } 1969 1970 static int 1971 vmxnet3_open(struct net_device *netdev) 1972 { 1973 struct vmxnet3_adapter *adapter; 1974 int err; 1975 1976 adapter = netdev_priv(netdev); 1977 1978 spin_lock_init(&adapter->tx_queue.tx_lock); 1979 1980 err = vmxnet3_create_queues(adapter, VMXNET3_DEF_TX_RING_SIZE, 1981 VMXNET3_DEF_RX_RING_SIZE, 1982 VMXNET3_DEF_RX_RING_SIZE); 1983 if (err) 1984 goto queue_err; 1985 1986 err = vmxnet3_activate_dev(adapter); 1987 if (err) 1988 goto activate_err; 1989 1990 return 0; 1991 1992 activate_err: 1993 vmxnet3_rq_destroy(&adapter->rx_queue, adapter); 1994 vmxnet3_tq_destroy(&adapter->tx_queue, adapter); 1995 queue_err: 1996 return err; 1997 } 1998 1999 2000 static int 2001 vmxnet3_close(struct net_device *netdev) 2002 { 2003 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 2004 2005 /* 2006 * Reset_work may be in the middle of resetting the device, wait for its 2007 * completion. 2008 */ 2009 while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state)) 2010 msleep(1); 2011 2012 vmxnet3_quiesce_dev(adapter); 2013 2014 vmxnet3_rq_destroy(&adapter->rx_queue, adapter); 2015 vmxnet3_tq_destroy(&adapter->tx_queue, adapter); 2016 2017 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state); 2018 2019 2020 return 0; 2021 } 2022 2023 2024 void 2025 vmxnet3_force_close(struct vmxnet3_adapter *adapter) 2026 { 2027 /* 2028 * we must clear VMXNET3_STATE_BIT_RESETTING, otherwise 2029 * vmxnet3_close() will deadlock. 2030 */ 2031 BUG_ON(test_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state)); 2032 2033 /* we need to enable NAPI, otherwise dev_close will deadlock */ 2034 napi_enable(&adapter->napi); 2035 dev_close(adapter->netdev); 2036 } 2037 2038 2039 static int 2040 vmxnet3_change_mtu(struct net_device *netdev, int new_mtu) 2041 { 2042 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 2043 int err = 0; 2044 2045 if (new_mtu < VMXNET3_MIN_MTU || new_mtu > VMXNET3_MAX_MTU) 2046 return -EINVAL; 2047 2048 if (new_mtu > 1500 && !adapter->jumbo_frame) 2049 return -EINVAL; 2050 2051 netdev->mtu = new_mtu; 2052 2053 /* 2054 * Reset_work may be in the middle of resetting the device, wait for its 2055 * completion. 2056 */ 2057 while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state)) 2058 msleep(1); 2059 2060 if (netif_running(netdev)) { 2061 vmxnet3_quiesce_dev(adapter); 2062 vmxnet3_reset_dev(adapter); 2063 2064 /* we need to re-create the rx queue based on the new mtu */ 2065 vmxnet3_rq_destroy(&adapter->rx_queue, adapter); 2066 vmxnet3_adjust_rx_ring_size(adapter); 2067 adapter->rx_queue.comp_ring.size = 2068 adapter->rx_queue.rx_ring[0].size + 2069 adapter->rx_queue.rx_ring[1].size; 2070 err = vmxnet3_rq_create(&adapter->rx_queue, adapter); 2071 if (err) { 2072 printk(KERN_ERR "%s: failed to re-create rx queue," 2073 " error %d. Closing it.\n", netdev->name, err); 2074 goto out; 2075 } 2076 2077 err = vmxnet3_activate_dev(adapter); 2078 if (err) { 2079 printk(KERN_ERR "%s: failed to re-activate, error %d. " 2080 "Closing it\n", netdev->name, err); 2081 goto out; 2082 } 2083 } 2084 2085 out: 2086 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state); 2087 if (err) 2088 vmxnet3_force_close(adapter); 2089 2090 return err; 2091 } 2092 2093 2094 static void 2095 vmxnet3_declare_features(struct vmxnet3_adapter *adapter, bool dma64) 2096 { 2097 struct net_device *netdev = adapter->netdev; 2098 2099 netdev->features = NETIF_F_SG | 2100 NETIF_F_HW_CSUM | 2101 NETIF_F_HW_VLAN_TX | 2102 NETIF_F_HW_VLAN_RX | 2103 NETIF_F_HW_VLAN_FILTER | 2104 NETIF_F_TSO | 2105 NETIF_F_TSO6 | 2106 NETIF_F_LRO; 2107 2108 printk(KERN_INFO "features: sg csum vlan jf tso tsoIPv6 lro"); 2109 2110 adapter->rxcsum = true; 2111 adapter->jumbo_frame = true; 2112 adapter->lro = true; 2113 2114 if (dma64) { 2115 netdev->features |= NETIF_F_HIGHDMA; 2116 printk(" highDMA"); 2117 } 2118 2119 netdev->vlan_features = netdev->features; 2120 printk("\n"); 2121 } 2122 2123 2124 static void 2125 vmxnet3_read_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac) 2126 { 2127 u32 tmp; 2128 2129 tmp = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_MACL); 2130 *(u32 *)mac = tmp; 2131 2132 tmp = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_MACH); 2133 mac[4] = tmp & 0xff; 2134 mac[5] = (tmp >> 8) & 0xff; 2135 } 2136 2137 2138 static void 2139 vmxnet3_alloc_intr_resources(struct vmxnet3_adapter *adapter) 2140 { 2141 u32 cfg; 2142 2143 /* intr settings */ 2144 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 2145 VMXNET3_CMD_GET_CONF_INTR); 2146 cfg = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD); 2147 adapter->intr.type = cfg & 0x3; 2148 adapter->intr.mask_mode = (cfg >> 2) & 0x3; 2149 2150 if (adapter->intr.type == VMXNET3_IT_AUTO) { 2151 int err; 2152 2153 #ifdef CONFIG_PCI_MSI 2154 adapter->intr.msix_entries[0].entry = 0; 2155 err = pci_enable_msix(adapter->pdev, adapter->intr.msix_entries, 2156 VMXNET3_LINUX_MAX_MSIX_VECT); 2157 if (!err) { 2158 adapter->intr.num_intrs = 1; 2159 adapter->intr.type = VMXNET3_IT_MSIX; 2160 return; 2161 } 2162 #endif 2163 2164 err = pci_enable_msi(adapter->pdev); 2165 if (!err) { 2166 adapter->intr.num_intrs = 1; 2167 adapter->intr.type = VMXNET3_IT_MSI; 2168 return; 2169 } 2170 } 2171 2172 adapter->intr.type = VMXNET3_IT_INTX; 2173 2174 /* INT-X related setting */ 2175 adapter->intr.num_intrs = 1; 2176 } 2177 2178 2179 static void 2180 vmxnet3_free_intr_resources(struct vmxnet3_adapter *adapter) 2181 { 2182 if (adapter->intr.type == VMXNET3_IT_MSIX) 2183 pci_disable_msix(adapter->pdev); 2184 else if (adapter->intr.type == VMXNET3_IT_MSI) 2185 pci_disable_msi(adapter->pdev); 2186 else 2187 BUG_ON(adapter->intr.type != VMXNET3_IT_INTX); 2188 } 2189 2190 2191 static void 2192 vmxnet3_tx_timeout(struct net_device *netdev) 2193 { 2194 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 2195 adapter->tx_timeout_count++; 2196 2197 printk(KERN_ERR "%s: tx hang\n", adapter->netdev->name); 2198 schedule_work(&adapter->work); 2199 } 2200 2201 2202 static void 2203 vmxnet3_reset_work(struct work_struct *data) 2204 { 2205 struct vmxnet3_adapter *adapter; 2206 2207 adapter = container_of(data, struct vmxnet3_adapter, work); 2208 2209 /* if another thread is resetting the device, no need to proceed */ 2210 if (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state)) 2211 return; 2212 2213 /* if the device is closed, we must leave it alone */ 2214 if (netif_running(adapter->netdev)) { 2215 printk(KERN_INFO "%s: resetting\n", adapter->netdev->name); 2216 vmxnet3_quiesce_dev(adapter); 2217 vmxnet3_reset_dev(adapter); 2218 vmxnet3_activate_dev(adapter); 2219 } else { 2220 printk(KERN_INFO "%s: already closed\n", adapter->netdev->name); 2221 } 2222 2223 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state); 2224 } 2225 2226 2227 static int __devinit 2228 vmxnet3_probe_device(struct pci_dev *pdev, 2229 const struct pci_device_id *id) 2230 { 2231 static const struct net_device_ops vmxnet3_netdev_ops = { 2232 .ndo_open = vmxnet3_open, 2233 .ndo_stop = vmxnet3_close, 2234 .ndo_start_xmit = vmxnet3_xmit_frame, 2235 .ndo_set_mac_address = vmxnet3_set_mac_addr, 2236 .ndo_change_mtu = vmxnet3_change_mtu, 2237 .ndo_get_stats = vmxnet3_get_stats, 2238 .ndo_tx_timeout = vmxnet3_tx_timeout, 2239 .ndo_set_multicast_list = vmxnet3_set_mc, 2240 .ndo_vlan_rx_register = vmxnet3_vlan_rx_register, 2241 .ndo_vlan_rx_add_vid = vmxnet3_vlan_rx_add_vid, 2242 .ndo_vlan_rx_kill_vid = vmxnet3_vlan_rx_kill_vid, 2243 #ifdef CONFIG_NET_POLL_CONTROLLER 2244 .ndo_poll_controller = vmxnet3_netpoll, 2245 #endif 2246 }; 2247 int err; 2248 bool dma64 = false; /* stupid gcc */ 2249 u32 ver; 2250 struct net_device *netdev; 2251 struct vmxnet3_adapter *adapter; 2252 u8 mac[ETH_ALEN]; 2253 2254 netdev = alloc_etherdev(sizeof(struct vmxnet3_adapter)); 2255 if (!netdev) { 2256 printk(KERN_ERR "Failed to alloc ethernet device for adapter " 2257 "%s\n", pci_name(pdev)); 2258 return -ENOMEM; 2259 } 2260 2261 pci_set_drvdata(pdev, netdev); 2262 adapter = netdev_priv(netdev); 2263 adapter->netdev = netdev; 2264 adapter->pdev = pdev; 2265 2266 adapter->shared = pci_alloc_consistent(adapter->pdev, 2267 sizeof(struct Vmxnet3_DriverShared), 2268 &adapter->shared_pa); 2269 if (!adapter->shared) { 2270 printk(KERN_ERR "Failed to allocate memory for %s\n", 2271 pci_name(pdev)); 2272 err = -ENOMEM; 2273 goto err_alloc_shared; 2274 } 2275 2276 adapter->tqd_start = pci_alloc_consistent(adapter->pdev, 2277 sizeof(struct Vmxnet3_TxQueueDesc) + 2278 sizeof(struct Vmxnet3_RxQueueDesc), 2279 &adapter->queue_desc_pa); 2280 2281 if (!adapter->tqd_start) { 2282 printk(KERN_ERR "Failed to allocate memory for %s\n", 2283 pci_name(pdev)); 2284 err = -ENOMEM; 2285 goto err_alloc_queue_desc; 2286 } 2287 adapter->rqd_start = (struct Vmxnet3_RxQueueDesc *)(adapter->tqd_start 2288 + 1); 2289 2290 adapter->pm_conf = kmalloc(sizeof(struct Vmxnet3_PMConf), GFP_KERNEL); 2291 if (adapter->pm_conf == NULL) { 2292 printk(KERN_ERR "Failed to allocate memory for %s\n", 2293 pci_name(pdev)); 2294 err = -ENOMEM; 2295 goto err_alloc_pm; 2296 } 2297 2298 err = vmxnet3_alloc_pci_resources(adapter, &dma64); 2299 if (err < 0) 2300 goto err_alloc_pci; 2301 2302 ver = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_VRRS); 2303 if (ver & 1) { 2304 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_VRRS, 1); 2305 } else { 2306 printk(KERN_ERR "Incompatible h/w version (0x%x) for adapter" 2307 " %s\n", ver, pci_name(pdev)); 2308 err = -EBUSY; 2309 goto err_ver; 2310 } 2311 2312 ver = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_UVRS); 2313 if (ver & 1) { 2314 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_UVRS, 1); 2315 } else { 2316 printk(KERN_ERR "Incompatible upt version (0x%x) for " 2317 "adapter %s\n", ver, pci_name(pdev)); 2318 err = -EBUSY; 2319 goto err_ver; 2320 } 2321 2322 vmxnet3_declare_features(adapter, dma64); 2323 2324 adapter->dev_number = atomic_read(&devices_found); 2325 vmxnet3_alloc_intr_resources(adapter); 2326 2327 vmxnet3_read_mac_addr(adapter, mac); 2328 memcpy(netdev->dev_addr, mac, netdev->addr_len); 2329 2330 netdev->netdev_ops = &vmxnet3_netdev_ops; 2331 netdev->watchdog_timeo = 5 * HZ; 2332 vmxnet3_set_ethtool_ops(netdev); 2333 2334 INIT_WORK(&adapter->work, vmxnet3_reset_work); 2335 2336 netif_napi_add(netdev, &adapter->napi, vmxnet3_poll, 64); 2337 SET_NETDEV_DEV(netdev, &pdev->dev); 2338 err = register_netdev(netdev); 2339 2340 if (err) { 2341 printk(KERN_ERR "Failed to register adapter %s\n", 2342 pci_name(pdev)); 2343 goto err_register; 2344 } 2345 2346 set_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state); 2347 atomic_inc(&devices_found); 2348 return 0; 2349 2350 err_register: 2351 vmxnet3_free_intr_resources(adapter); 2352 err_ver: 2353 vmxnet3_free_pci_resources(adapter); 2354 err_alloc_pci: 2355 kfree(adapter->pm_conf); 2356 err_alloc_pm: 2357 pci_free_consistent(adapter->pdev, sizeof(struct Vmxnet3_TxQueueDesc) + 2358 sizeof(struct Vmxnet3_RxQueueDesc), 2359 adapter->tqd_start, adapter->queue_desc_pa); 2360 err_alloc_queue_desc: 2361 pci_free_consistent(adapter->pdev, sizeof(struct Vmxnet3_DriverShared), 2362 adapter->shared, adapter->shared_pa); 2363 err_alloc_shared: 2364 pci_set_drvdata(pdev, NULL); 2365 free_netdev(netdev); 2366 return err; 2367 } 2368 2369 2370 static void __devexit 2371 vmxnet3_remove_device(struct pci_dev *pdev) 2372 { 2373 struct net_device *netdev = pci_get_drvdata(pdev); 2374 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 2375 2376 flush_scheduled_work(); 2377 2378 unregister_netdev(netdev); 2379 2380 vmxnet3_free_intr_resources(adapter); 2381 vmxnet3_free_pci_resources(adapter); 2382 kfree(adapter->pm_conf); 2383 pci_free_consistent(adapter->pdev, sizeof(struct Vmxnet3_TxQueueDesc) + 2384 sizeof(struct Vmxnet3_RxQueueDesc), 2385 adapter->tqd_start, adapter->queue_desc_pa); 2386 pci_free_consistent(adapter->pdev, sizeof(struct Vmxnet3_DriverShared), 2387 adapter->shared, adapter->shared_pa); 2388 free_netdev(netdev); 2389 } 2390 2391 2392 #ifdef CONFIG_PM 2393 2394 static int 2395 vmxnet3_suspend(struct device *device) 2396 { 2397 struct pci_dev *pdev = to_pci_dev(device); 2398 struct net_device *netdev = pci_get_drvdata(pdev); 2399 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 2400 struct Vmxnet3_PMConf *pmConf; 2401 struct ethhdr *ehdr; 2402 struct arphdr *ahdr; 2403 u8 *arpreq; 2404 struct in_device *in_dev; 2405 struct in_ifaddr *ifa; 2406 int i = 0; 2407 2408 if (!netif_running(netdev)) 2409 return 0; 2410 2411 vmxnet3_disable_all_intrs(adapter); 2412 vmxnet3_free_irqs(adapter); 2413 vmxnet3_free_intr_resources(adapter); 2414 2415 netif_device_detach(netdev); 2416 netif_stop_queue(netdev); 2417 2418 /* Create wake-up filters. */ 2419 pmConf = adapter->pm_conf; 2420 memset(pmConf, 0, sizeof(*pmConf)); 2421 2422 if (adapter->wol & WAKE_UCAST) { 2423 pmConf->filters[i].patternSize = ETH_ALEN; 2424 pmConf->filters[i].maskSize = 1; 2425 memcpy(pmConf->filters[i].pattern, netdev->dev_addr, ETH_ALEN); 2426 pmConf->filters[i].mask[0] = 0x3F; /* LSB ETH_ALEN bits */ 2427 2428 pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_FILTER; 2429 i++; 2430 } 2431 2432 if (adapter->wol & WAKE_ARP) { 2433 in_dev = in_dev_get(netdev); 2434 if (!in_dev) 2435 goto skip_arp; 2436 2437 ifa = (struct in_ifaddr *)in_dev->ifa_list; 2438 if (!ifa) 2439 goto skip_arp; 2440 2441 pmConf->filters[i].patternSize = ETH_HLEN + /* Ethernet header*/ 2442 sizeof(struct arphdr) + /* ARP header */ 2443 2 * ETH_ALEN + /* 2 Ethernet addresses*/ 2444 2 * sizeof(u32); /*2 IPv4 addresses */ 2445 pmConf->filters[i].maskSize = 2446 (pmConf->filters[i].patternSize - 1) / 8 + 1; 2447 2448 /* ETH_P_ARP in Ethernet header. */ 2449 ehdr = (struct ethhdr *)pmConf->filters[i].pattern; 2450 ehdr->h_proto = htons(ETH_P_ARP); 2451 2452 /* ARPOP_REQUEST in ARP header. */ 2453 ahdr = (struct arphdr *)&pmConf->filters[i].pattern[ETH_HLEN]; 2454 ahdr->ar_op = htons(ARPOP_REQUEST); 2455 arpreq = (u8 *)(ahdr + 1); 2456 2457 /* The Unicast IPv4 address in 'tip' field. */ 2458 arpreq += 2 * ETH_ALEN + sizeof(u32); 2459 *(u32 *)arpreq = ifa->ifa_address; 2460 2461 /* The mask for the relevant bits. */ 2462 pmConf->filters[i].mask[0] = 0x00; 2463 pmConf->filters[i].mask[1] = 0x30; /* ETH_P_ARP */ 2464 pmConf->filters[i].mask[2] = 0x30; /* ARPOP_REQUEST */ 2465 pmConf->filters[i].mask[3] = 0x00; 2466 pmConf->filters[i].mask[4] = 0xC0; /* IPv4 TIP */ 2467 pmConf->filters[i].mask[5] = 0x03; /* IPv4 TIP */ 2468 in_dev_put(in_dev); 2469 2470 pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_FILTER; 2471 i++; 2472 } 2473 2474 skip_arp: 2475 if (adapter->wol & WAKE_MAGIC) 2476 pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_MAGIC; 2477 2478 pmConf->numFilters = i; 2479 2480 adapter->shared->devRead.pmConfDesc.confVer = 1; 2481 adapter->shared->devRead.pmConfDesc.confLen = sizeof(*pmConf); 2482 adapter->shared->devRead.pmConfDesc.confPA = virt_to_phys(pmConf); 2483 2484 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 2485 VMXNET3_CMD_UPDATE_PMCFG); 2486 2487 pci_save_state(pdev); 2488 pci_enable_wake(pdev, pci_choose_state(pdev, PMSG_SUSPEND), 2489 adapter->wol); 2490 pci_disable_device(pdev); 2491 pci_set_power_state(pdev, pci_choose_state(pdev, PMSG_SUSPEND)); 2492 2493 return 0; 2494 } 2495 2496 2497 static int 2498 vmxnet3_resume(struct device *device) 2499 { 2500 int err; 2501 struct pci_dev *pdev = to_pci_dev(device); 2502 struct net_device *netdev = pci_get_drvdata(pdev); 2503 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 2504 struct Vmxnet3_PMConf *pmConf; 2505 2506 if (!netif_running(netdev)) 2507 return 0; 2508 2509 /* Destroy wake-up filters. */ 2510 pmConf = adapter->pm_conf; 2511 memset(pmConf, 0, sizeof(*pmConf)); 2512 2513 adapter->shared->devRead.pmConfDesc.confVer = 1; 2514 adapter->shared->devRead.pmConfDesc.confLen = sizeof(*pmConf); 2515 adapter->shared->devRead.pmConfDesc.confPA = virt_to_phys(pmConf); 2516 2517 netif_device_attach(netdev); 2518 pci_set_power_state(pdev, PCI_D0); 2519 pci_restore_state(pdev); 2520 err = pci_enable_device_mem(pdev); 2521 if (err != 0) 2522 return err; 2523 2524 pci_enable_wake(pdev, PCI_D0, 0); 2525 2526 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 2527 VMXNET3_CMD_UPDATE_PMCFG); 2528 vmxnet3_alloc_intr_resources(adapter); 2529 vmxnet3_request_irqs(adapter); 2530 vmxnet3_enable_all_intrs(adapter); 2531 2532 return 0; 2533 } 2534 2535 static struct dev_pm_ops vmxnet3_pm_ops = { 2536 .suspend = vmxnet3_suspend, 2537 .resume = vmxnet3_resume, 2538 }; 2539 #endif 2540 2541 static struct pci_driver vmxnet3_driver = { 2542 .name = vmxnet3_driver_name, 2543 .id_table = vmxnet3_pciid_table, 2544 .probe = vmxnet3_probe_device, 2545 .remove = __devexit_p(vmxnet3_remove_device), 2546 #ifdef CONFIG_PM 2547 .driver.pm = &vmxnet3_pm_ops, 2548 #endif 2549 }; 2550 2551 2552 static int __init 2553 vmxnet3_init_module(void) 2554 { 2555 printk(KERN_INFO "%s - version %s\n", VMXNET3_DRIVER_DESC, 2556 VMXNET3_DRIVER_VERSION_REPORT); 2557 return pci_register_driver(&vmxnet3_driver); 2558 } 2559 2560 module_init(vmxnet3_init_module); 2561 2562 2563 static void 2564 vmxnet3_exit_module(void) 2565 { 2566 pci_unregister_driver(&vmxnet3_driver); 2567 } 2568 2569 module_exit(vmxnet3_exit_module); 2570 2571 MODULE_AUTHOR("VMware, Inc."); 2572 MODULE_DESCRIPTION(VMXNET3_DRIVER_DESC); 2573 MODULE_LICENSE("GPL v2"); 2574 MODULE_VERSION(VMXNET3_DRIVER_VERSION_STRING); 2575