vmxnet3_drv.c revision f6957f88e59df5008f7b2169400be657f81cdb80
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 <net/ip6_checksum.h> 28 29#include "vmxnet3_int.h" 30 31char vmxnet3_driver_name[] = "vmxnet3"; 32#define VMXNET3_DRIVER_DESC "VMware vmxnet3 virtual NIC driver" 33 34/* 35 * PCI Device ID Table 36 * Last entry must be all 0s 37 */ 38static DEFINE_PCI_DEVICE_TABLE(vmxnet3_pciid_table) = { 39 {PCI_VDEVICE(VMWARE, PCI_DEVICE_ID_VMWARE_VMXNET3)}, 40 {0} 41}; 42 43MODULE_DEVICE_TABLE(pci, vmxnet3_pciid_table); 44 45static atomic_t devices_found; 46 47#define VMXNET3_MAX_DEVICES 10 48static int enable_mq = 1; 49static int irq_share_mode; 50 51static void 52vmxnet3_write_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac); 53 54/* 55 * Enable/Disable the given intr 56 */ 57static void 58vmxnet3_enable_intr(struct vmxnet3_adapter *adapter, unsigned intr_idx) 59{ 60 VMXNET3_WRITE_BAR0_REG(adapter, VMXNET3_REG_IMR + intr_idx * 8, 0); 61} 62 63 64static void 65vmxnet3_disable_intr(struct vmxnet3_adapter *adapter, unsigned intr_idx) 66{ 67 VMXNET3_WRITE_BAR0_REG(adapter, VMXNET3_REG_IMR + intr_idx * 8, 1); 68} 69 70 71/* 72 * Enable/Disable all intrs used by the device 73 */ 74static void 75vmxnet3_enable_all_intrs(struct vmxnet3_adapter *adapter) 76{ 77 int i; 78 79 for (i = 0; i < adapter->intr.num_intrs; i++) 80 vmxnet3_enable_intr(adapter, i); 81 adapter->shared->devRead.intrConf.intrCtrl &= 82 cpu_to_le32(~VMXNET3_IC_DISABLE_ALL); 83} 84 85 86static void 87vmxnet3_disable_all_intrs(struct vmxnet3_adapter *adapter) 88{ 89 int i; 90 91 adapter->shared->devRead.intrConf.intrCtrl |= 92 cpu_to_le32(VMXNET3_IC_DISABLE_ALL); 93 for (i = 0; i < adapter->intr.num_intrs; i++) 94 vmxnet3_disable_intr(adapter, i); 95} 96 97 98static void 99vmxnet3_ack_events(struct vmxnet3_adapter *adapter, u32 events) 100{ 101 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_ECR, events); 102} 103 104 105static bool 106vmxnet3_tq_stopped(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter) 107{ 108 return tq->stopped; 109} 110 111 112static void 113vmxnet3_tq_start(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter) 114{ 115 tq->stopped = false; 116 netif_start_subqueue(adapter->netdev, tq - adapter->tx_queue); 117} 118 119 120static void 121vmxnet3_tq_wake(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter) 122{ 123 tq->stopped = false; 124 netif_wake_subqueue(adapter->netdev, (tq - adapter->tx_queue)); 125} 126 127 128static void 129vmxnet3_tq_stop(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter) 130{ 131 tq->stopped = true; 132 tq->num_stop++; 133 netif_stop_subqueue(adapter->netdev, (tq - adapter->tx_queue)); 134} 135 136 137/* 138 * Check the link state. This may start or stop the tx queue. 139 */ 140static void 141vmxnet3_check_link(struct vmxnet3_adapter *adapter, bool affectTxQueue) 142{ 143 u32 ret; 144 int i; 145 unsigned long flags; 146 147 spin_lock_irqsave(&adapter->cmd_lock, flags); 148 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_GET_LINK); 149 ret = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD); 150 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 151 152 adapter->link_speed = ret >> 16; 153 if (ret & 1) { /* Link is up. */ 154 printk(KERN_INFO "%s: NIC Link is Up %d Mbps\n", 155 adapter->netdev->name, adapter->link_speed); 156 if (!netif_carrier_ok(adapter->netdev)) 157 netif_carrier_on(adapter->netdev); 158 159 if (affectTxQueue) { 160 for (i = 0; i < adapter->num_tx_queues; i++) 161 vmxnet3_tq_start(&adapter->tx_queue[i], 162 adapter); 163 } 164 } else { 165 printk(KERN_INFO "%s: NIC Link is Down\n", 166 adapter->netdev->name); 167 if (netif_carrier_ok(adapter->netdev)) 168 netif_carrier_off(adapter->netdev); 169 170 if (affectTxQueue) { 171 for (i = 0; i < adapter->num_tx_queues; i++) 172 vmxnet3_tq_stop(&adapter->tx_queue[i], adapter); 173 } 174 } 175} 176 177static void 178vmxnet3_process_events(struct vmxnet3_adapter *adapter) 179{ 180 int i; 181 unsigned long flags; 182 u32 events = le32_to_cpu(adapter->shared->ecr); 183 if (!events) 184 return; 185 186 vmxnet3_ack_events(adapter, events); 187 188 /* Check if link state has changed */ 189 if (events & VMXNET3_ECR_LINK) 190 vmxnet3_check_link(adapter, true); 191 192 /* Check if there is an error on xmit/recv queues */ 193 if (events & (VMXNET3_ECR_TQERR | VMXNET3_ECR_RQERR)) { 194 spin_lock_irqsave(&adapter->cmd_lock, flags); 195 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 196 VMXNET3_CMD_GET_QUEUE_STATUS); 197 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 198 199 for (i = 0; i < adapter->num_tx_queues; i++) 200 if (adapter->tqd_start[i].status.stopped) 201 dev_err(&adapter->netdev->dev, 202 "%s: tq[%d] error 0x%x\n", 203 adapter->netdev->name, i, le32_to_cpu( 204 adapter->tqd_start[i].status.error)); 205 for (i = 0; i < adapter->num_rx_queues; i++) 206 if (adapter->rqd_start[i].status.stopped) 207 dev_err(&adapter->netdev->dev, 208 "%s: rq[%d] error 0x%x\n", 209 adapter->netdev->name, i, 210 adapter->rqd_start[i].status.error); 211 212 schedule_work(&adapter->work); 213 } 214} 215 216#ifdef __BIG_ENDIAN_BITFIELD 217/* 218 * The device expects the bitfields in shared structures to be written in 219 * little endian. When CPU is big endian, the following routines are used to 220 * correctly read and write into ABI. 221 * The general technique used here is : double word bitfields are defined in 222 * opposite order for big endian architecture. Then before reading them in 223 * driver the complete double word is translated using le32_to_cpu. Similarly 224 * After the driver writes into bitfields, cpu_to_le32 is used to translate the 225 * double words into required format. 226 * In order to avoid touching bits in shared structure more than once, temporary 227 * descriptors are used. These are passed as srcDesc to following functions. 228 */ 229static void vmxnet3_RxDescToCPU(const struct Vmxnet3_RxDesc *srcDesc, 230 struct Vmxnet3_RxDesc *dstDesc) 231{ 232 u32 *src = (u32 *)srcDesc + 2; 233 u32 *dst = (u32 *)dstDesc + 2; 234 dstDesc->addr = le64_to_cpu(srcDesc->addr); 235 *dst = le32_to_cpu(*src); 236 dstDesc->ext1 = le32_to_cpu(srcDesc->ext1); 237} 238 239static void vmxnet3_TxDescToLe(const struct Vmxnet3_TxDesc *srcDesc, 240 struct Vmxnet3_TxDesc *dstDesc) 241{ 242 int i; 243 u32 *src = (u32 *)(srcDesc + 1); 244 u32 *dst = (u32 *)(dstDesc + 1); 245 246 /* Working backwards so that the gen bit is set at the end. */ 247 for (i = 2; i > 0; i--) { 248 src--; 249 dst--; 250 *dst = cpu_to_le32(*src); 251 } 252} 253 254 255static void vmxnet3_RxCompToCPU(const struct Vmxnet3_RxCompDesc *srcDesc, 256 struct Vmxnet3_RxCompDesc *dstDesc) 257{ 258 int i = 0; 259 u32 *src = (u32 *)srcDesc; 260 u32 *dst = (u32 *)dstDesc; 261 for (i = 0; i < sizeof(struct Vmxnet3_RxCompDesc) / sizeof(u32); i++) { 262 *dst = le32_to_cpu(*src); 263 src++; 264 dst++; 265 } 266} 267 268 269/* Used to read bitfield values from double words. */ 270static u32 get_bitfield32(const __le32 *bitfield, u32 pos, u32 size) 271{ 272 u32 temp = le32_to_cpu(*bitfield); 273 u32 mask = ((1 << size) - 1) << pos; 274 temp &= mask; 275 temp >>= pos; 276 return temp; 277} 278 279 280 281#endif /* __BIG_ENDIAN_BITFIELD */ 282 283#ifdef __BIG_ENDIAN_BITFIELD 284 285# define VMXNET3_TXDESC_GET_GEN(txdesc) get_bitfield32(((const __le32 *) \ 286 txdesc) + VMXNET3_TXD_GEN_DWORD_SHIFT, \ 287 VMXNET3_TXD_GEN_SHIFT, VMXNET3_TXD_GEN_SIZE) 288# define VMXNET3_TXDESC_GET_EOP(txdesc) get_bitfield32(((const __le32 *) \ 289 txdesc) + VMXNET3_TXD_EOP_DWORD_SHIFT, \ 290 VMXNET3_TXD_EOP_SHIFT, VMXNET3_TXD_EOP_SIZE) 291# define VMXNET3_TCD_GET_GEN(tcd) get_bitfield32(((const __le32 *)tcd) + \ 292 VMXNET3_TCD_GEN_DWORD_SHIFT, VMXNET3_TCD_GEN_SHIFT, \ 293 VMXNET3_TCD_GEN_SIZE) 294# define VMXNET3_TCD_GET_TXIDX(tcd) get_bitfield32((const __le32 *)tcd, \ 295 VMXNET3_TCD_TXIDX_SHIFT, VMXNET3_TCD_TXIDX_SIZE) 296# define vmxnet3_getRxComp(dstrcd, rcd, tmp) do { \ 297 (dstrcd) = (tmp); \ 298 vmxnet3_RxCompToCPU((rcd), (tmp)); \ 299 } while (0) 300# define vmxnet3_getRxDesc(dstrxd, rxd, tmp) do { \ 301 (dstrxd) = (tmp); \ 302 vmxnet3_RxDescToCPU((rxd), (tmp)); \ 303 } while (0) 304 305#else 306 307# define VMXNET3_TXDESC_GET_GEN(txdesc) ((txdesc)->gen) 308# define VMXNET3_TXDESC_GET_EOP(txdesc) ((txdesc)->eop) 309# define VMXNET3_TCD_GET_GEN(tcd) ((tcd)->gen) 310# define VMXNET3_TCD_GET_TXIDX(tcd) ((tcd)->txdIdx) 311# define vmxnet3_getRxComp(dstrcd, rcd, tmp) (dstrcd) = (rcd) 312# define vmxnet3_getRxDesc(dstrxd, rxd, tmp) (dstrxd) = (rxd) 313 314#endif /* __BIG_ENDIAN_BITFIELD */ 315 316 317static void 318vmxnet3_unmap_tx_buf(struct vmxnet3_tx_buf_info *tbi, 319 struct pci_dev *pdev) 320{ 321 if (tbi->map_type == VMXNET3_MAP_SINGLE) 322 pci_unmap_single(pdev, tbi->dma_addr, tbi->len, 323 PCI_DMA_TODEVICE); 324 else if (tbi->map_type == VMXNET3_MAP_PAGE) 325 pci_unmap_page(pdev, tbi->dma_addr, tbi->len, 326 PCI_DMA_TODEVICE); 327 else 328 BUG_ON(tbi->map_type != VMXNET3_MAP_NONE); 329 330 tbi->map_type = VMXNET3_MAP_NONE; /* to help debugging */ 331} 332 333 334static int 335vmxnet3_unmap_pkt(u32 eop_idx, struct vmxnet3_tx_queue *tq, 336 struct pci_dev *pdev, struct vmxnet3_adapter *adapter) 337{ 338 struct sk_buff *skb; 339 int entries = 0; 340 341 /* no out of order completion */ 342 BUG_ON(tq->buf_info[eop_idx].sop_idx != tq->tx_ring.next2comp); 343 BUG_ON(VMXNET3_TXDESC_GET_EOP(&(tq->tx_ring.base[eop_idx].txd)) != 1); 344 345 skb = tq->buf_info[eop_idx].skb; 346 BUG_ON(skb == NULL); 347 tq->buf_info[eop_idx].skb = NULL; 348 349 VMXNET3_INC_RING_IDX_ONLY(eop_idx, tq->tx_ring.size); 350 351 while (tq->tx_ring.next2comp != eop_idx) { 352 vmxnet3_unmap_tx_buf(tq->buf_info + tq->tx_ring.next2comp, 353 pdev); 354 355 /* update next2comp w/o tx_lock. Since we are marking more, 356 * instead of less, tx ring entries avail, the worst case is 357 * that the tx routine incorrectly re-queues a pkt due to 358 * insufficient tx ring entries. 359 */ 360 vmxnet3_cmd_ring_adv_next2comp(&tq->tx_ring); 361 entries++; 362 } 363 364 dev_kfree_skb_any(skb); 365 return entries; 366} 367 368 369static int 370vmxnet3_tq_tx_complete(struct vmxnet3_tx_queue *tq, 371 struct vmxnet3_adapter *adapter) 372{ 373 int completed = 0; 374 union Vmxnet3_GenericDesc *gdesc; 375 376 gdesc = tq->comp_ring.base + tq->comp_ring.next2proc; 377 while (VMXNET3_TCD_GET_GEN(&gdesc->tcd) == tq->comp_ring.gen) { 378 completed += vmxnet3_unmap_pkt(VMXNET3_TCD_GET_TXIDX( 379 &gdesc->tcd), tq, adapter->pdev, 380 adapter); 381 382 vmxnet3_comp_ring_adv_next2proc(&tq->comp_ring); 383 gdesc = tq->comp_ring.base + tq->comp_ring.next2proc; 384 } 385 386 if (completed) { 387 spin_lock(&tq->tx_lock); 388 if (unlikely(vmxnet3_tq_stopped(tq, adapter) && 389 vmxnet3_cmd_ring_desc_avail(&tq->tx_ring) > 390 VMXNET3_WAKE_QUEUE_THRESHOLD(tq) && 391 netif_carrier_ok(adapter->netdev))) { 392 vmxnet3_tq_wake(tq, adapter); 393 } 394 spin_unlock(&tq->tx_lock); 395 } 396 return completed; 397} 398 399 400static void 401vmxnet3_tq_cleanup(struct vmxnet3_tx_queue *tq, 402 struct vmxnet3_adapter *adapter) 403{ 404 int i; 405 406 while (tq->tx_ring.next2comp != tq->tx_ring.next2fill) { 407 struct vmxnet3_tx_buf_info *tbi; 408 409 tbi = tq->buf_info + tq->tx_ring.next2comp; 410 411 vmxnet3_unmap_tx_buf(tbi, adapter->pdev); 412 if (tbi->skb) { 413 dev_kfree_skb_any(tbi->skb); 414 tbi->skb = NULL; 415 } 416 vmxnet3_cmd_ring_adv_next2comp(&tq->tx_ring); 417 } 418 419 /* sanity check, verify all buffers are indeed unmapped and freed */ 420 for (i = 0; i < tq->tx_ring.size; i++) { 421 BUG_ON(tq->buf_info[i].skb != NULL || 422 tq->buf_info[i].map_type != VMXNET3_MAP_NONE); 423 } 424 425 tq->tx_ring.gen = VMXNET3_INIT_GEN; 426 tq->tx_ring.next2fill = tq->tx_ring.next2comp = 0; 427 428 tq->comp_ring.gen = VMXNET3_INIT_GEN; 429 tq->comp_ring.next2proc = 0; 430} 431 432 433static void 434vmxnet3_tq_destroy(struct vmxnet3_tx_queue *tq, 435 struct vmxnet3_adapter *adapter) 436{ 437 if (tq->tx_ring.base) { 438 pci_free_consistent(adapter->pdev, tq->tx_ring.size * 439 sizeof(struct Vmxnet3_TxDesc), 440 tq->tx_ring.base, tq->tx_ring.basePA); 441 tq->tx_ring.base = NULL; 442 } 443 if (tq->data_ring.base) { 444 pci_free_consistent(adapter->pdev, tq->data_ring.size * 445 sizeof(struct Vmxnet3_TxDataDesc), 446 tq->data_ring.base, tq->data_ring.basePA); 447 tq->data_ring.base = NULL; 448 } 449 if (tq->comp_ring.base) { 450 pci_free_consistent(adapter->pdev, tq->comp_ring.size * 451 sizeof(struct Vmxnet3_TxCompDesc), 452 tq->comp_ring.base, tq->comp_ring.basePA); 453 tq->comp_ring.base = NULL; 454 } 455 kfree(tq->buf_info); 456 tq->buf_info = NULL; 457} 458 459 460/* Destroy all tx queues */ 461void 462vmxnet3_tq_destroy_all(struct vmxnet3_adapter *adapter) 463{ 464 int i; 465 466 for (i = 0; i < adapter->num_tx_queues; i++) 467 vmxnet3_tq_destroy(&adapter->tx_queue[i], adapter); 468} 469 470 471static void 472vmxnet3_tq_init(struct vmxnet3_tx_queue *tq, 473 struct vmxnet3_adapter *adapter) 474{ 475 int i; 476 477 /* reset the tx ring contents to 0 and reset the tx ring states */ 478 memset(tq->tx_ring.base, 0, tq->tx_ring.size * 479 sizeof(struct Vmxnet3_TxDesc)); 480 tq->tx_ring.next2fill = tq->tx_ring.next2comp = 0; 481 tq->tx_ring.gen = VMXNET3_INIT_GEN; 482 483 memset(tq->data_ring.base, 0, tq->data_ring.size * 484 sizeof(struct Vmxnet3_TxDataDesc)); 485 486 /* reset the tx comp ring contents to 0 and reset comp ring states */ 487 memset(tq->comp_ring.base, 0, tq->comp_ring.size * 488 sizeof(struct Vmxnet3_TxCompDesc)); 489 tq->comp_ring.next2proc = 0; 490 tq->comp_ring.gen = VMXNET3_INIT_GEN; 491 492 /* reset the bookkeeping data */ 493 memset(tq->buf_info, 0, sizeof(tq->buf_info[0]) * tq->tx_ring.size); 494 for (i = 0; i < tq->tx_ring.size; i++) 495 tq->buf_info[i].map_type = VMXNET3_MAP_NONE; 496 497 /* stats are not reset */ 498} 499 500 501static int 502vmxnet3_tq_create(struct vmxnet3_tx_queue *tq, 503 struct vmxnet3_adapter *adapter) 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 = pci_alloc_consistent(adapter->pdev, tq->tx_ring.size 509 * sizeof(struct Vmxnet3_TxDesc), 510 &tq->tx_ring.basePA); 511 if (!tq->tx_ring.base) { 512 printk(KERN_ERR "%s: failed to allocate tx ring\n", 513 adapter->netdev->name); 514 goto err; 515 } 516 517 tq->data_ring.base = pci_alloc_consistent(adapter->pdev, 518 tq->data_ring.size * 519 sizeof(struct Vmxnet3_TxDataDesc), 520 &tq->data_ring.basePA); 521 if (!tq->data_ring.base) { 522 printk(KERN_ERR "%s: failed to allocate data ring\n", 523 adapter->netdev->name); 524 goto err; 525 } 526 527 tq->comp_ring.base = pci_alloc_consistent(adapter->pdev, 528 tq->comp_ring.size * 529 sizeof(struct Vmxnet3_TxCompDesc), 530 &tq->comp_ring.basePA); 531 if (!tq->comp_ring.base) { 532 printk(KERN_ERR "%s: failed to allocate tx comp ring\n", 533 adapter->netdev->name); 534 goto err; 535 } 536 537 tq->buf_info = kcalloc(tq->tx_ring.size, sizeof(tq->buf_info[0]), 538 GFP_KERNEL); 539 if (!tq->buf_info) { 540 printk(KERN_ERR "%s: failed to allocate tx bufinfo\n", 541 adapter->netdev->name); 542 goto err; 543 } 544 545 return 0; 546 547err: 548 vmxnet3_tq_destroy(tq, adapter); 549 return -ENOMEM; 550} 551 552static void 553vmxnet3_tq_cleanup_all(struct vmxnet3_adapter *adapter) 554{ 555 int i; 556 557 for (i = 0; i < adapter->num_tx_queues; i++) 558 vmxnet3_tq_cleanup(&adapter->tx_queue[i], adapter); 559} 560 561/* 562 * starting from ring->next2fill, allocate rx buffers for the given ring 563 * of the rx queue and update the rx desc. stop after @num_to_alloc buffers 564 * are allocated or allocation fails 565 */ 566 567static int 568vmxnet3_rq_alloc_rx_buf(struct vmxnet3_rx_queue *rq, u32 ring_idx, 569 int num_to_alloc, struct vmxnet3_adapter *adapter) 570{ 571 int num_allocated = 0; 572 struct vmxnet3_rx_buf_info *rbi_base = rq->buf_info[ring_idx]; 573 struct vmxnet3_cmd_ring *ring = &rq->rx_ring[ring_idx]; 574 u32 val; 575 576 while (num_allocated <= num_to_alloc) { 577 struct vmxnet3_rx_buf_info *rbi; 578 union Vmxnet3_GenericDesc *gd; 579 580 rbi = rbi_base + ring->next2fill; 581 gd = ring->base + ring->next2fill; 582 583 if (rbi->buf_type == VMXNET3_RX_BUF_SKB) { 584 if (rbi->skb == NULL) { 585 rbi->skb = dev_alloc_skb(rbi->len + 586 NET_IP_ALIGN); 587 if (unlikely(rbi->skb == NULL)) { 588 rq->stats.rx_buf_alloc_failure++; 589 break; 590 } 591 rbi->skb->dev = adapter->netdev; 592 593 skb_reserve(rbi->skb, NET_IP_ALIGN); 594 rbi->dma_addr = pci_map_single(adapter->pdev, 595 rbi->skb->data, rbi->len, 596 PCI_DMA_FROMDEVICE); 597 } else { 598 /* rx buffer skipped by the device */ 599 } 600 val = VMXNET3_RXD_BTYPE_HEAD << VMXNET3_RXD_BTYPE_SHIFT; 601 } else { 602 BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_PAGE || 603 rbi->len != PAGE_SIZE); 604 605 if (rbi->page == NULL) { 606 rbi->page = alloc_page(GFP_ATOMIC); 607 if (unlikely(rbi->page == NULL)) { 608 rq->stats.rx_buf_alloc_failure++; 609 break; 610 } 611 rbi->dma_addr = pci_map_page(adapter->pdev, 612 rbi->page, 0, PAGE_SIZE, 613 PCI_DMA_FROMDEVICE); 614 } else { 615 /* rx buffers skipped by the device */ 616 } 617 val = VMXNET3_RXD_BTYPE_BODY << VMXNET3_RXD_BTYPE_SHIFT; 618 } 619 620 BUG_ON(rbi->dma_addr == 0); 621 gd->rxd.addr = cpu_to_le64(rbi->dma_addr); 622 gd->dword[2] = cpu_to_le32((!ring->gen << VMXNET3_RXD_GEN_SHIFT) 623 | val | rbi->len); 624 625 /* Fill the last buffer but dont mark it ready, or else the 626 * device will think that the queue is full */ 627 if (num_allocated == num_to_alloc) 628 break; 629 630 gd->dword[2] |= cpu_to_le32(ring->gen << VMXNET3_RXD_GEN_SHIFT); 631 num_allocated++; 632 vmxnet3_cmd_ring_adv_next2fill(ring); 633 } 634 rq->uncommitted[ring_idx] += num_allocated; 635 636 dev_dbg(&adapter->netdev->dev, 637 "alloc_rx_buf: %d allocated, next2fill %u, next2comp " 638 "%u, uncommited %u\n", num_allocated, ring->next2fill, 639 ring->next2comp, rq->uncommitted[ring_idx]); 640 641 /* so that the device can distinguish a full ring and an empty ring */ 642 BUG_ON(num_allocated != 0 && ring->next2fill == ring->next2comp); 643 644 return num_allocated; 645} 646 647 648static void 649vmxnet3_append_frag(struct sk_buff *skb, struct Vmxnet3_RxCompDesc *rcd, 650 struct vmxnet3_rx_buf_info *rbi) 651{ 652 struct skb_frag_struct *frag = skb_shinfo(skb)->frags + 653 skb_shinfo(skb)->nr_frags; 654 655 BUG_ON(skb_shinfo(skb)->nr_frags >= MAX_SKB_FRAGS); 656 657 frag->page = rbi->page; 658 frag->page_offset = 0; 659 frag->size = rcd->len; 660 skb->data_len += frag->size; 661 skb_shinfo(skb)->nr_frags++; 662} 663 664 665static void 666vmxnet3_map_pkt(struct sk_buff *skb, struct vmxnet3_tx_ctx *ctx, 667 struct vmxnet3_tx_queue *tq, struct pci_dev *pdev, 668 struct vmxnet3_adapter *adapter) 669{ 670 u32 dw2, len; 671 unsigned long buf_offset; 672 int i; 673 union Vmxnet3_GenericDesc *gdesc; 674 struct vmxnet3_tx_buf_info *tbi = NULL; 675 676 BUG_ON(ctx->copy_size > skb_headlen(skb)); 677 678 /* use the previous gen bit for the SOP desc */ 679 dw2 = (tq->tx_ring.gen ^ 0x1) << VMXNET3_TXD_GEN_SHIFT; 680 681 ctx->sop_txd = tq->tx_ring.base + tq->tx_ring.next2fill; 682 gdesc = ctx->sop_txd; /* both loops below can be skipped */ 683 684 /* no need to map the buffer if headers are copied */ 685 if (ctx->copy_size) { 686 ctx->sop_txd->txd.addr = cpu_to_le64(tq->data_ring.basePA + 687 tq->tx_ring.next2fill * 688 sizeof(struct Vmxnet3_TxDataDesc)); 689 ctx->sop_txd->dword[2] = cpu_to_le32(dw2 | ctx->copy_size); 690 ctx->sop_txd->dword[3] = 0; 691 692 tbi = tq->buf_info + tq->tx_ring.next2fill; 693 tbi->map_type = VMXNET3_MAP_NONE; 694 695 dev_dbg(&adapter->netdev->dev, 696 "txd[%u]: 0x%Lx 0x%x 0x%x\n", 697 tq->tx_ring.next2fill, 698 le64_to_cpu(ctx->sop_txd->txd.addr), 699 ctx->sop_txd->dword[2], ctx->sop_txd->dword[3]); 700 vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring); 701 702 /* use the right gen for non-SOP desc */ 703 dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT; 704 } 705 706 /* linear part can use multiple tx desc if it's big */ 707 len = skb_headlen(skb) - ctx->copy_size; 708 buf_offset = ctx->copy_size; 709 while (len) { 710 u32 buf_size; 711 712 if (len < VMXNET3_MAX_TX_BUF_SIZE) { 713 buf_size = len; 714 dw2 |= len; 715 } else { 716 buf_size = VMXNET3_MAX_TX_BUF_SIZE; 717 /* spec says that for TxDesc.len, 0 == 2^14 */ 718 } 719 720 tbi = tq->buf_info + tq->tx_ring.next2fill; 721 tbi->map_type = VMXNET3_MAP_SINGLE; 722 tbi->dma_addr = pci_map_single(adapter->pdev, 723 skb->data + buf_offset, buf_size, 724 PCI_DMA_TODEVICE); 725 726 tbi->len = buf_size; 727 728 gdesc = tq->tx_ring.base + tq->tx_ring.next2fill; 729 BUG_ON(gdesc->txd.gen == tq->tx_ring.gen); 730 731 gdesc->txd.addr = cpu_to_le64(tbi->dma_addr); 732 gdesc->dword[2] = cpu_to_le32(dw2); 733 gdesc->dword[3] = 0; 734 735 dev_dbg(&adapter->netdev->dev, 736 "txd[%u]: 0x%Lx 0x%x 0x%x\n", 737 tq->tx_ring.next2fill, le64_to_cpu(gdesc->txd.addr), 738 le32_to_cpu(gdesc->dword[2]), gdesc->dword[3]); 739 vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring); 740 dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT; 741 742 len -= buf_size; 743 buf_offset += buf_size; 744 } 745 746 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 747 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i]; 748 749 tbi = tq->buf_info + tq->tx_ring.next2fill; 750 tbi->map_type = VMXNET3_MAP_PAGE; 751 tbi->dma_addr = pci_map_page(adapter->pdev, frag->page, 752 frag->page_offset, frag->size, 753 PCI_DMA_TODEVICE); 754 755 tbi->len = frag->size; 756 757 gdesc = tq->tx_ring.base + tq->tx_ring.next2fill; 758 BUG_ON(gdesc->txd.gen == tq->tx_ring.gen); 759 760 gdesc->txd.addr = cpu_to_le64(tbi->dma_addr); 761 gdesc->dword[2] = cpu_to_le32(dw2 | frag->size); 762 gdesc->dword[3] = 0; 763 764 dev_dbg(&adapter->netdev->dev, 765 "txd[%u]: 0x%llu %u %u\n", 766 tq->tx_ring.next2fill, le64_to_cpu(gdesc->txd.addr), 767 le32_to_cpu(gdesc->dword[2]), gdesc->dword[3]); 768 vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring); 769 dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT; 770 } 771 772 ctx->eop_txd = gdesc; 773 774 /* set the last buf_info for the pkt */ 775 tbi->skb = skb; 776 tbi->sop_idx = ctx->sop_txd - tq->tx_ring.base; 777} 778 779 780/* Init all tx queues */ 781static void 782vmxnet3_tq_init_all(struct vmxnet3_adapter *adapter) 783{ 784 int i; 785 786 for (i = 0; i < adapter->num_tx_queues; i++) 787 vmxnet3_tq_init(&adapter->tx_queue[i], adapter); 788} 789 790 791/* 792 * parse and copy relevant protocol headers: 793 * For a tso pkt, relevant headers are L2/3/4 including options 794 * For a pkt requesting csum offloading, they are L2/3 and may include L4 795 * if it's a TCP/UDP pkt 796 * 797 * Returns: 798 * -1: error happens during parsing 799 * 0: protocol headers parsed, but too big to be copied 800 * 1: protocol headers parsed and copied 801 * 802 * Other effects: 803 * 1. related *ctx fields are updated. 804 * 2. ctx->copy_size is # of bytes copied 805 * 3. the portion copied is guaranteed to be in the linear part 806 * 807 */ 808static int 809vmxnet3_parse_and_copy_hdr(struct sk_buff *skb, struct vmxnet3_tx_queue *tq, 810 struct vmxnet3_tx_ctx *ctx, 811 struct vmxnet3_adapter *adapter) 812{ 813 struct Vmxnet3_TxDataDesc *tdd; 814 815 if (ctx->mss) { /* TSO */ 816 ctx->eth_ip_hdr_size = skb_transport_offset(skb); 817 ctx->l4_hdr_size = ((struct tcphdr *) 818 skb_transport_header(skb))->doff * 4; 819 ctx->copy_size = ctx->eth_ip_hdr_size + ctx->l4_hdr_size; 820 } else { 821 if (skb->ip_summed == CHECKSUM_PARTIAL) { 822 ctx->eth_ip_hdr_size = skb_checksum_start_offset(skb); 823 824 if (ctx->ipv4) { 825 struct iphdr *iph = (struct iphdr *) 826 skb_network_header(skb); 827 if (iph->protocol == IPPROTO_TCP) 828 ctx->l4_hdr_size = ((struct tcphdr *) 829 skb_transport_header(skb))->doff * 4; 830 else if (iph->protocol == IPPROTO_UDP) 831 /* 832 * Use tcp header size so that bytes to 833 * be copied are more than required by 834 * the device. 835 */ 836 ctx->l4_hdr_size = 837 sizeof(struct tcphdr); 838 else 839 ctx->l4_hdr_size = 0; 840 } else { 841 /* for simplicity, don't copy L4 headers */ 842 ctx->l4_hdr_size = 0; 843 } 844 ctx->copy_size = ctx->eth_ip_hdr_size + 845 ctx->l4_hdr_size; 846 } else { 847 ctx->eth_ip_hdr_size = 0; 848 ctx->l4_hdr_size = 0; 849 /* copy as much as allowed */ 850 ctx->copy_size = min((unsigned int)VMXNET3_HDR_COPY_SIZE 851 , skb_headlen(skb)); 852 } 853 854 /* make sure headers are accessible directly */ 855 if (unlikely(!pskb_may_pull(skb, ctx->copy_size))) 856 goto err; 857 } 858 859 if (unlikely(ctx->copy_size > VMXNET3_HDR_COPY_SIZE)) { 860 tq->stats.oversized_hdr++; 861 ctx->copy_size = 0; 862 return 0; 863 } 864 865 tdd = tq->data_ring.base + tq->tx_ring.next2fill; 866 867 memcpy(tdd->data, skb->data, ctx->copy_size); 868 dev_dbg(&adapter->netdev->dev, 869 "copy %u bytes to dataRing[%u]\n", 870 ctx->copy_size, tq->tx_ring.next2fill); 871 return 1; 872 873err: 874 return -1; 875} 876 877 878static void 879vmxnet3_prepare_tso(struct sk_buff *skb, 880 struct vmxnet3_tx_ctx *ctx) 881{ 882 struct tcphdr *tcph = (struct tcphdr *)skb_transport_header(skb); 883 if (ctx->ipv4) { 884 struct iphdr *iph = (struct iphdr *)skb_network_header(skb); 885 iph->check = 0; 886 tcph->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr, 0, 887 IPPROTO_TCP, 0); 888 } else { 889 struct ipv6hdr *iph = (struct ipv6hdr *)skb_network_header(skb); 890 tcph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, 0, 891 IPPROTO_TCP, 0); 892 } 893} 894 895 896/* 897 * Transmits a pkt thru a given tq 898 * Returns: 899 * NETDEV_TX_OK: descriptors are setup successfully 900 * NETDEV_TX_OK: error occurred, the pkt is dropped 901 * NETDEV_TX_BUSY: tx ring is full, queue is stopped 902 * 903 * Side-effects: 904 * 1. tx ring may be changed 905 * 2. tq stats may be updated accordingly 906 * 3. shared->txNumDeferred may be updated 907 */ 908 909static int 910vmxnet3_tq_xmit(struct sk_buff *skb, struct vmxnet3_tx_queue *tq, 911 struct vmxnet3_adapter *adapter, struct net_device *netdev) 912{ 913 int ret; 914 u32 count; 915 unsigned long flags; 916 struct vmxnet3_tx_ctx ctx; 917 union Vmxnet3_GenericDesc *gdesc; 918#ifdef __BIG_ENDIAN_BITFIELD 919 /* Use temporary descriptor to avoid touching bits multiple times */ 920 union Vmxnet3_GenericDesc tempTxDesc; 921#endif 922 923 /* conservatively estimate # of descriptors to use */ 924 count = VMXNET3_TXD_NEEDED(skb_headlen(skb)) + 925 skb_shinfo(skb)->nr_frags + 1; 926 927 ctx.ipv4 = (vlan_get_protocol(skb) == cpu_to_be16(ETH_P_IP)); 928 929 ctx.mss = skb_shinfo(skb)->gso_size; 930 if (ctx.mss) { 931 if (skb_header_cloned(skb)) { 932 if (unlikely(pskb_expand_head(skb, 0, 0, 933 GFP_ATOMIC) != 0)) { 934 tq->stats.drop_tso++; 935 goto drop_pkt; 936 } 937 tq->stats.copy_skb_header++; 938 } 939 vmxnet3_prepare_tso(skb, &ctx); 940 } else { 941 if (unlikely(count > VMXNET3_MAX_TXD_PER_PKT)) { 942 943 /* non-tso pkts must not use more than 944 * VMXNET3_MAX_TXD_PER_PKT entries 945 */ 946 if (skb_linearize(skb) != 0) { 947 tq->stats.drop_too_many_frags++; 948 goto drop_pkt; 949 } 950 tq->stats.linearized++; 951 952 /* recalculate the # of descriptors to use */ 953 count = VMXNET3_TXD_NEEDED(skb_headlen(skb)) + 1; 954 } 955 } 956 957 spin_lock_irqsave(&tq->tx_lock, flags); 958 959 if (count > vmxnet3_cmd_ring_desc_avail(&tq->tx_ring)) { 960 tq->stats.tx_ring_full++; 961 dev_dbg(&adapter->netdev->dev, 962 "tx queue stopped on %s, next2comp %u" 963 " next2fill %u\n", adapter->netdev->name, 964 tq->tx_ring.next2comp, tq->tx_ring.next2fill); 965 966 vmxnet3_tq_stop(tq, adapter); 967 spin_unlock_irqrestore(&tq->tx_lock, flags); 968 return NETDEV_TX_BUSY; 969 } 970 971 972 ret = vmxnet3_parse_and_copy_hdr(skb, tq, &ctx, adapter); 973 if (ret >= 0) { 974 BUG_ON(ret <= 0 && ctx.copy_size != 0); 975 /* hdrs parsed, check against other limits */ 976 if (ctx.mss) { 977 if (unlikely(ctx.eth_ip_hdr_size + ctx.l4_hdr_size > 978 VMXNET3_MAX_TX_BUF_SIZE)) { 979 goto hdr_too_big; 980 } 981 } else { 982 if (skb->ip_summed == CHECKSUM_PARTIAL) { 983 if (unlikely(ctx.eth_ip_hdr_size + 984 skb->csum_offset > 985 VMXNET3_MAX_CSUM_OFFSET)) { 986 goto hdr_too_big; 987 } 988 } 989 } 990 } else { 991 tq->stats.drop_hdr_inspect_err++; 992 goto unlock_drop_pkt; 993 } 994 995 /* fill tx descs related to addr & len */ 996 vmxnet3_map_pkt(skb, &ctx, tq, adapter->pdev, adapter); 997 998 /* setup the EOP desc */ 999 ctx.eop_txd->dword[3] = cpu_to_le32(VMXNET3_TXD_CQ | VMXNET3_TXD_EOP); 1000 1001 /* setup the SOP desc */ 1002#ifdef __BIG_ENDIAN_BITFIELD 1003 gdesc = &tempTxDesc; 1004 gdesc->dword[2] = ctx.sop_txd->dword[2]; 1005 gdesc->dword[3] = ctx.sop_txd->dword[3]; 1006#else 1007 gdesc = ctx.sop_txd; 1008#endif 1009 if (ctx.mss) { 1010 gdesc->txd.hlen = ctx.eth_ip_hdr_size + ctx.l4_hdr_size; 1011 gdesc->txd.om = VMXNET3_OM_TSO; 1012 gdesc->txd.msscof = ctx.mss; 1013 le32_add_cpu(&tq->shared->txNumDeferred, (skb->len - 1014 gdesc->txd.hlen + ctx.mss - 1) / ctx.mss); 1015 } else { 1016 if (skb->ip_summed == CHECKSUM_PARTIAL) { 1017 gdesc->txd.hlen = ctx.eth_ip_hdr_size; 1018 gdesc->txd.om = VMXNET3_OM_CSUM; 1019 gdesc->txd.msscof = ctx.eth_ip_hdr_size + 1020 skb->csum_offset; 1021 } else { 1022 gdesc->txd.om = 0; 1023 gdesc->txd.msscof = 0; 1024 } 1025 le32_add_cpu(&tq->shared->txNumDeferred, 1); 1026 } 1027 1028 if (vlan_tx_tag_present(skb)) { 1029 gdesc->txd.ti = 1; 1030 gdesc->txd.tci = vlan_tx_tag_get(skb); 1031 } 1032 1033 /* finally flips the GEN bit of the SOP desc. */ 1034 gdesc->dword[2] = cpu_to_le32(le32_to_cpu(gdesc->dword[2]) ^ 1035 VMXNET3_TXD_GEN); 1036#ifdef __BIG_ENDIAN_BITFIELD 1037 /* Finished updating in bitfields of Tx Desc, so write them in original 1038 * place. 1039 */ 1040 vmxnet3_TxDescToLe((struct Vmxnet3_TxDesc *)gdesc, 1041 (struct Vmxnet3_TxDesc *)ctx.sop_txd); 1042 gdesc = ctx.sop_txd; 1043#endif 1044 dev_dbg(&adapter->netdev->dev, 1045 "txd[%u]: SOP 0x%Lx 0x%x 0x%x\n", 1046 (u32)((union Vmxnet3_GenericDesc *)ctx.sop_txd - 1047 tq->tx_ring.base), le64_to_cpu(gdesc->txd.addr), 1048 le32_to_cpu(gdesc->dword[2]), le32_to_cpu(gdesc->dword[3])); 1049 1050 spin_unlock_irqrestore(&tq->tx_lock, flags); 1051 1052 if (le32_to_cpu(tq->shared->txNumDeferred) >= 1053 le32_to_cpu(tq->shared->txThreshold)) { 1054 tq->shared->txNumDeferred = 0; 1055 VMXNET3_WRITE_BAR0_REG(adapter, 1056 VMXNET3_REG_TXPROD + tq->qid * 8, 1057 tq->tx_ring.next2fill); 1058 } 1059 1060 return NETDEV_TX_OK; 1061 1062hdr_too_big: 1063 tq->stats.drop_oversized_hdr++; 1064unlock_drop_pkt: 1065 spin_unlock_irqrestore(&tq->tx_lock, flags); 1066drop_pkt: 1067 tq->stats.drop_total++; 1068 dev_kfree_skb(skb); 1069 return NETDEV_TX_OK; 1070} 1071 1072 1073static netdev_tx_t 1074vmxnet3_xmit_frame(struct sk_buff *skb, struct net_device *netdev) 1075{ 1076 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 1077 1078 BUG_ON(skb->queue_mapping > adapter->num_tx_queues); 1079 return vmxnet3_tq_xmit(skb, 1080 &adapter->tx_queue[skb->queue_mapping], 1081 adapter, netdev); 1082} 1083 1084 1085static void 1086vmxnet3_rx_csum(struct vmxnet3_adapter *adapter, 1087 struct sk_buff *skb, 1088 union Vmxnet3_GenericDesc *gdesc) 1089{ 1090 if (!gdesc->rcd.cnc && adapter->netdev->features & NETIF_F_RXCSUM) { 1091 /* typical case: TCP/UDP over IP and both csums are correct */ 1092 if ((le32_to_cpu(gdesc->dword[3]) & VMXNET3_RCD_CSUM_OK) == 1093 VMXNET3_RCD_CSUM_OK) { 1094 skb->ip_summed = CHECKSUM_UNNECESSARY; 1095 BUG_ON(!(gdesc->rcd.tcp || gdesc->rcd.udp)); 1096 BUG_ON(!(gdesc->rcd.v4 || gdesc->rcd.v6)); 1097 BUG_ON(gdesc->rcd.frg); 1098 } else { 1099 if (gdesc->rcd.csum) { 1100 skb->csum = htons(gdesc->rcd.csum); 1101 skb->ip_summed = CHECKSUM_PARTIAL; 1102 } else { 1103 skb_checksum_none_assert(skb); 1104 } 1105 } 1106 } else { 1107 skb_checksum_none_assert(skb); 1108 } 1109} 1110 1111 1112static void 1113vmxnet3_rx_error(struct vmxnet3_rx_queue *rq, struct Vmxnet3_RxCompDesc *rcd, 1114 struct vmxnet3_rx_ctx *ctx, struct vmxnet3_adapter *adapter) 1115{ 1116 rq->stats.drop_err++; 1117 if (!rcd->fcs) 1118 rq->stats.drop_fcs++; 1119 1120 rq->stats.drop_total++; 1121 1122 /* 1123 * We do not unmap and chain the rx buffer to the skb. 1124 * We basically pretend this buffer is not used and will be recycled 1125 * by vmxnet3_rq_alloc_rx_buf() 1126 */ 1127 1128 /* 1129 * ctx->skb may be NULL if this is the first and the only one 1130 * desc for the pkt 1131 */ 1132 if (ctx->skb) 1133 dev_kfree_skb_irq(ctx->skb); 1134 1135 ctx->skb = NULL; 1136} 1137 1138 1139static int 1140vmxnet3_rq_rx_complete(struct vmxnet3_rx_queue *rq, 1141 struct vmxnet3_adapter *adapter, int quota) 1142{ 1143 static const u32 rxprod_reg[2] = { 1144 VMXNET3_REG_RXPROD, VMXNET3_REG_RXPROD2 1145 }; 1146 u32 num_rxd = 0; 1147 bool skip_page_frags = false; 1148 struct Vmxnet3_RxCompDesc *rcd; 1149 struct vmxnet3_rx_ctx *ctx = &rq->rx_ctx; 1150#ifdef __BIG_ENDIAN_BITFIELD 1151 struct Vmxnet3_RxDesc rxCmdDesc; 1152 struct Vmxnet3_RxCompDesc rxComp; 1153#endif 1154 vmxnet3_getRxComp(rcd, &rq->comp_ring.base[rq->comp_ring.next2proc].rcd, 1155 &rxComp); 1156 while (rcd->gen == rq->comp_ring.gen) { 1157 struct vmxnet3_rx_buf_info *rbi; 1158 struct sk_buff *skb, *new_skb = NULL; 1159 struct page *new_page = NULL; 1160 int num_to_alloc; 1161 struct Vmxnet3_RxDesc *rxd; 1162 u32 idx, ring_idx; 1163 struct vmxnet3_cmd_ring *ring = NULL; 1164 if (num_rxd >= quota) { 1165 /* we may stop even before we see the EOP desc of 1166 * the current pkt 1167 */ 1168 break; 1169 } 1170 num_rxd++; 1171 BUG_ON(rcd->rqID != rq->qid && rcd->rqID != rq->qid2); 1172 idx = rcd->rxdIdx; 1173 ring_idx = rcd->rqID < adapter->num_rx_queues ? 0 : 1; 1174 ring = rq->rx_ring + ring_idx; 1175 vmxnet3_getRxDesc(rxd, &rq->rx_ring[ring_idx].base[idx].rxd, 1176 &rxCmdDesc); 1177 rbi = rq->buf_info[ring_idx] + idx; 1178 1179 BUG_ON(rxd->addr != rbi->dma_addr || 1180 rxd->len != rbi->len); 1181 1182 if (unlikely(rcd->eop && rcd->err)) { 1183 vmxnet3_rx_error(rq, rcd, ctx, adapter); 1184 goto rcd_done; 1185 } 1186 1187 if (rcd->sop) { /* first buf of the pkt */ 1188 BUG_ON(rxd->btype != VMXNET3_RXD_BTYPE_HEAD || 1189 rcd->rqID != rq->qid); 1190 1191 BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_SKB); 1192 BUG_ON(ctx->skb != NULL || rbi->skb == NULL); 1193 1194 if (unlikely(rcd->len == 0)) { 1195 /* Pretend the rx buffer is skipped. */ 1196 BUG_ON(!(rcd->sop && rcd->eop)); 1197 dev_dbg(&adapter->netdev->dev, 1198 "rxRing[%u][%u] 0 length\n", 1199 ring_idx, idx); 1200 goto rcd_done; 1201 } 1202 1203 skip_page_frags = false; 1204 ctx->skb = rbi->skb; 1205 new_skb = dev_alloc_skb(rbi->len + NET_IP_ALIGN); 1206 if (new_skb == NULL) { 1207 /* Skb allocation failed, do not handover this 1208 * skb to stack. Reuse it. Drop the existing pkt 1209 */ 1210 rq->stats.rx_buf_alloc_failure++; 1211 ctx->skb = NULL; 1212 rq->stats.drop_total++; 1213 skip_page_frags = true; 1214 goto rcd_done; 1215 } 1216 1217 pci_unmap_single(adapter->pdev, rbi->dma_addr, rbi->len, 1218 PCI_DMA_FROMDEVICE); 1219 1220 skb_put(ctx->skb, rcd->len); 1221 1222 /* Immediate refill */ 1223 new_skb->dev = adapter->netdev; 1224 skb_reserve(new_skb, NET_IP_ALIGN); 1225 rbi->skb = new_skb; 1226 rbi->dma_addr = pci_map_single(adapter->pdev, 1227 rbi->skb->data, rbi->len, 1228 PCI_DMA_FROMDEVICE); 1229 rxd->addr = cpu_to_le64(rbi->dma_addr); 1230 rxd->len = rbi->len; 1231 1232 } else { 1233 BUG_ON(ctx->skb == NULL && !skip_page_frags); 1234 1235 /* non SOP buffer must be type 1 in most cases */ 1236 BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_PAGE); 1237 BUG_ON(rxd->btype != VMXNET3_RXD_BTYPE_BODY); 1238 1239 /* If an sop buffer was dropped, skip all 1240 * following non-sop fragments. They will be reused. 1241 */ 1242 if (skip_page_frags) 1243 goto rcd_done; 1244 1245 new_page = alloc_page(GFP_ATOMIC); 1246 if (unlikely(new_page == NULL)) { 1247 /* Replacement page frag could not be allocated. 1248 * Reuse this page. Drop the pkt and free the 1249 * skb which contained this page as a frag. Skip 1250 * processing all the following non-sop frags. 1251 */ 1252 rq->stats.rx_buf_alloc_failure++; 1253 dev_kfree_skb(ctx->skb); 1254 ctx->skb = NULL; 1255 skip_page_frags = true; 1256 goto rcd_done; 1257 } 1258 1259 if (rcd->len) { 1260 pci_unmap_page(adapter->pdev, 1261 rbi->dma_addr, rbi->len, 1262 PCI_DMA_FROMDEVICE); 1263 1264 vmxnet3_append_frag(ctx->skb, rcd, rbi); 1265 } 1266 1267 /* Immediate refill */ 1268 rbi->page = new_page; 1269 rbi->dma_addr = pci_map_page(adapter->pdev, rbi->page, 1270 0, PAGE_SIZE, 1271 PCI_DMA_FROMDEVICE); 1272 rxd->addr = cpu_to_le64(rbi->dma_addr); 1273 rxd->len = rbi->len; 1274 } 1275 1276 1277 skb = ctx->skb; 1278 if (rcd->eop) { 1279 skb->len += skb->data_len; 1280 skb->truesize += skb->data_len; 1281 1282 vmxnet3_rx_csum(adapter, skb, 1283 (union Vmxnet3_GenericDesc *)rcd); 1284 skb->protocol = eth_type_trans(skb, adapter->netdev); 1285 1286 if (unlikely(rcd->ts)) 1287 __vlan_hwaccel_put_tag(skb, rcd->tci); 1288 1289 if (adapter->netdev->features & NETIF_F_LRO) 1290 netif_receive_skb(skb); 1291 else 1292 napi_gro_receive(&rq->napi, skb); 1293 1294 ctx->skb = NULL; 1295 } 1296 1297rcd_done: 1298 /* device may have skipped some rx descs */ 1299 ring->next2comp = idx; 1300 num_to_alloc = vmxnet3_cmd_ring_desc_avail(ring); 1301 ring = rq->rx_ring + ring_idx; 1302 while (num_to_alloc) { 1303 vmxnet3_getRxDesc(rxd, &ring->base[ring->next2fill].rxd, 1304 &rxCmdDesc); 1305 BUG_ON(!rxd->addr); 1306 1307 /* Recv desc is ready to be used by the device */ 1308 rxd->gen = ring->gen; 1309 vmxnet3_cmd_ring_adv_next2fill(ring); 1310 num_to_alloc--; 1311 } 1312 1313 /* if needed, update the register */ 1314 if (unlikely(rq->shared->updateRxProd)) { 1315 VMXNET3_WRITE_BAR0_REG(adapter, 1316 rxprod_reg[ring_idx] + rq->qid * 8, 1317 ring->next2fill); 1318 rq->uncommitted[ring_idx] = 0; 1319 } 1320 1321 vmxnet3_comp_ring_adv_next2proc(&rq->comp_ring); 1322 vmxnet3_getRxComp(rcd, 1323 &rq->comp_ring.base[rq->comp_ring.next2proc].rcd, &rxComp); 1324 } 1325 1326 return num_rxd; 1327} 1328 1329 1330static void 1331vmxnet3_rq_cleanup(struct vmxnet3_rx_queue *rq, 1332 struct vmxnet3_adapter *adapter) 1333{ 1334 u32 i, ring_idx; 1335 struct Vmxnet3_RxDesc *rxd; 1336 1337 for (ring_idx = 0; ring_idx < 2; ring_idx++) { 1338 for (i = 0; i < rq->rx_ring[ring_idx].size; i++) { 1339#ifdef __BIG_ENDIAN_BITFIELD 1340 struct Vmxnet3_RxDesc rxDesc; 1341#endif 1342 vmxnet3_getRxDesc(rxd, 1343 &rq->rx_ring[ring_idx].base[i].rxd, &rxDesc); 1344 1345 if (rxd->btype == VMXNET3_RXD_BTYPE_HEAD && 1346 rq->buf_info[ring_idx][i].skb) { 1347 pci_unmap_single(adapter->pdev, rxd->addr, 1348 rxd->len, PCI_DMA_FROMDEVICE); 1349 dev_kfree_skb(rq->buf_info[ring_idx][i].skb); 1350 rq->buf_info[ring_idx][i].skb = NULL; 1351 } else if (rxd->btype == VMXNET3_RXD_BTYPE_BODY && 1352 rq->buf_info[ring_idx][i].page) { 1353 pci_unmap_page(adapter->pdev, rxd->addr, 1354 rxd->len, PCI_DMA_FROMDEVICE); 1355 put_page(rq->buf_info[ring_idx][i].page); 1356 rq->buf_info[ring_idx][i].page = NULL; 1357 } 1358 } 1359 1360 rq->rx_ring[ring_idx].gen = VMXNET3_INIT_GEN; 1361 rq->rx_ring[ring_idx].next2fill = 1362 rq->rx_ring[ring_idx].next2comp = 0; 1363 rq->uncommitted[ring_idx] = 0; 1364 } 1365 1366 rq->comp_ring.gen = VMXNET3_INIT_GEN; 1367 rq->comp_ring.next2proc = 0; 1368} 1369 1370 1371static void 1372vmxnet3_rq_cleanup_all(struct vmxnet3_adapter *adapter) 1373{ 1374 int i; 1375 1376 for (i = 0; i < adapter->num_rx_queues; i++) 1377 vmxnet3_rq_cleanup(&adapter->rx_queue[i], adapter); 1378} 1379 1380 1381void vmxnet3_rq_destroy(struct vmxnet3_rx_queue *rq, 1382 struct vmxnet3_adapter *adapter) 1383{ 1384 int i; 1385 int j; 1386 1387 /* all rx buffers must have already been freed */ 1388 for (i = 0; i < 2; i++) { 1389 if (rq->buf_info[i]) { 1390 for (j = 0; j < rq->rx_ring[i].size; j++) 1391 BUG_ON(rq->buf_info[i][j].page != NULL); 1392 } 1393 } 1394 1395 1396 kfree(rq->buf_info[0]); 1397 1398 for (i = 0; i < 2; i++) { 1399 if (rq->rx_ring[i].base) { 1400 pci_free_consistent(adapter->pdev, rq->rx_ring[i].size 1401 * sizeof(struct Vmxnet3_RxDesc), 1402 rq->rx_ring[i].base, 1403 rq->rx_ring[i].basePA); 1404 rq->rx_ring[i].base = NULL; 1405 } 1406 rq->buf_info[i] = NULL; 1407 } 1408 1409 if (rq->comp_ring.base) { 1410 pci_free_consistent(adapter->pdev, rq->comp_ring.size * 1411 sizeof(struct Vmxnet3_RxCompDesc), 1412 rq->comp_ring.base, rq->comp_ring.basePA); 1413 rq->comp_ring.base = NULL; 1414 } 1415} 1416 1417 1418static int 1419vmxnet3_rq_init(struct vmxnet3_rx_queue *rq, 1420 struct vmxnet3_adapter *adapter) 1421{ 1422 int i; 1423 1424 /* initialize buf_info */ 1425 for (i = 0; i < rq->rx_ring[0].size; i++) { 1426 1427 /* 1st buf for a pkt is skbuff */ 1428 if (i % adapter->rx_buf_per_pkt == 0) { 1429 rq->buf_info[0][i].buf_type = VMXNET3_RX_BUF_SKB; 1430 rq->buf_info[0][i].len = adapter->skb_buf_size; 1431 } else { /* subsequent bufs for a pkt is frag */ 1432 rq->buf_info[0][i].buf_type = VMXNET3_RX_BUF_PAGE; 1433 rq->buf_info[0][i].len = PAGE_SIZE; 1434 } 1435 } 1436 for (i = 0; i < rq->rx_ring[1].size; i++) { 1437 rq->buf_info[1][i].buf_type = VMXNET3_RX_BUF_PAGE; 1438 rq->buf_info[1][i].len = PAGE_SIZE; 1439 } 1440 1441 /* reset internal state and allocate buffers for both rings */ 1442 for (i = 0; i < 2; i++) { 1443 rq->rx_ring[i].next2fill = rq->rx_ring[i].next2comp = 0; 1444 rq->uncommitted[i] = 0; 1445 1446 memset(rq->rx_ring[i].base, 0, rq->rx_ring[i].size * 1447 sizeof(struct Vmxnet3_RxDesc)); 1448 rq->rx_ring[i].gen = VMXNET3_INIT_GEN; 1449 } 1450 if (vmxnet3_rq_alloc_rx_buf(rq, 0, rq->rx_ring[0].size - 1, 1451 adapter) == 0) { 1452 /* at least has 1 rx buffer for the 1st ring */ 1453 return -ENOMEM; 1454 } 1455 vmxnet3_rq_alloc_rx_buf(rq, 1, rq->rx_ring[1].size - 1, adapter); 1456 1457 /* reset the comp ring */ 1458 rq->comp_ring.next2proc = 0; 1459 memset(rq->comp_ring.base, 0, rq->comp_ring.size * 1460 sizeof(struct Vmxnet3_RxCompDesc)); 1461 rq->comp_ring.gen = VMXNET3_INIT_GEN; 1462 1463 /* reset rxctx */ 1464 rq->rx_ctx.skb = NULL; 1465 1466 /* stats are not reset */ 1467 return 0; 1468} 1469 1470 1471static int 1472vmxnet3_rq_init_all(struct vmxnet3_adapter *adapter) 1473{ 1474 int i, err = 0; 1475 1476 for (i = 0; i < adapter->num_rx_queues; i++) { 1477 err = vmxnet3_rq_init(&adapter->rx_queue[i], adapter); 1478 if (unlikely(err)) { 1479 dev_err(&adapter->netdev->dev, "%s: failed to " 1480 "initialize rx queue%i\n", 1481 adapter->netdev->name, i); 1482 break; 1483 } 1484 } 1485 return err; 1486 1487} 1488 1489 1490static int 1491vmxnet3_rq_create(struct vmxnet3_rx_queue *rq, struct vmxnet3_adapter *adapter) 1492{ 1493 int i; 1494 size_t sz; 1495 struct vmxnet3_rx_buf_info *bi; 1496 1497 for (i = 0; i < 2; i++) { 1498 1499 sz = rq->rx_ring[i].size * sizeof(struct Vmxnet3_RxDesc); 1500 rq->rx_ring[i].base = pci_alloc_consistent(adapter->pdev, sz, 1501 &rq->rx_ring[i].basePA); 1502 if (!rq->rx_ring[i].base) { 1503 printk(KERN_ERR "%s: failed to allocate rx ring %d\n", 1504 adapter->netdev->name, i); 1505 goto err; 1506 } 1507 } 1508 1509 sz = rq->comp_ring.size * sizeof(struct Vmxnet3_RxCompDesc); 1510 rq->comp_ring.base = pci_alloc_consistent(adapter->pdev, sz, 1511 &rq->comp_ring.basePA); 1512 if (!rq->comp_ring.base) { 1513 printk(KERN_ERR "%s: failed to allocate rx comp ring\n", 1514 adapter->netdev->name); 1515 goto err; 1516 } 1517 1518 sz = sizeof(struct vmxnet3_rx_buf_info) * (rq->rx_ring[0].size + 1519 rq->rx_ring[1].size); 1520 bi = kzalloc(sz, GFP_KERNEL); 1521 if (!bi) { 1522 printk(KERN_ERR "%s: failed to allocate rx bufinfo\n", 1523 adapter->netdev->name); 1524 goto err; 1525 } 1526 rq->buf_info[0] = bi; 1527 rq->buf_info[1] = bi + rq->rx_ring[0].size; 1528 1529 return 0; 1530 1531err: 1532 vmxnet3_rq_destroy(rq, adapter); 1533 return -ENOMEM; 1534} 1535 1536 1537static int 1538vmxnet3_rq_create_all(struct vmxnet3_adapter *adapter) 1539{ 1540 int i, err = 0; 1541 1542 for (i = 0; i < adapter->num_rx_queues; i++) { 1543 err = vmxnet3_rq_create(&adapter->rx_queue[i], adapter); 1544 if (unlikely(err)) { 1545 dev_err(&adapter->netdev->dev, 1546 "%s: failed to create rx queue%i\n", 1547 adapter->netdev->name, i); 1548 goto err_out; 1549 } 1550 } 1551 return err; 1552err_out: 1553 vmxnet3_rq_destroy_all(adapter); 1554 return err; 1555 1556} 1557 1558/* Multiple queue aware polling function for tx and rx */ 1559 1560static int 1561vmxnet3_do_poll(struct vmxnet3_adapter *adapter, int budget) 1562{ 1563 int rcd_done = 0, i; 1564 if (unlikely(adapter->shared->ecr)) 1565 vmxnet3_process_events(adapter); 1566 for (i = 0; i < adapter->num_tx_queues; i++) 1567 vmxnet3_tq_tx_complete(&adapter->tx_queue[i], adapter); 1568 1569 for (i = 0; i < adapter->num_rx_queues; i++) 1570 rcd_done += vmxnet3_rq_rx_complete(&adapter->rx_queue[i], 1571 adapter, budget); 1572 return rcd_done; 1573} 1574 1575 1576static int 1577vmxnet3_poll(struct napi_struct *napi, int budget) 1578{ 1579 struct vmxnet3_rx_queue *rx_queue = container_of(napi, 1580 struct vmxnet3_rx_queue, napi); 1581 int rxd_done; 1582 1583 rxd_done = vmxnet3_do_poll(rx_queue->adapter, budget); 1584 1585 if (rxd_done < budget) { 1586 napi_complete(napi); 1587 vmxnet3_enable_all_intrs(rx_queue->adapter); 1588 } 1589 return rxd_done; 1590} 1591 1592/* 1593 * NAPI polling function for MSI-X mode with multiple Rx queues 1594 * Returns the # of the NAPI credit consumed (# of rx descriptors processed) 1595 */ 1596 1597static int 1598vmxnet3_poll_rx_only(struct napi_struct *napi, int budget) 1599{ 1600 struct vmxnet3_rx_queue *rq = container_of(napi, 1601 struct vmxnet3_rx_queue, napi); 1602 struct vmxnet3_adapter *adapter = rq->adapter; 1603 int rxd_done; 1604 1605 /* When sharing interrupt with corresponding tx queue, process 1606 * tx completions in that queue as well 1607 */ 1608 if (adapter->share_intr == VMXNET3_INTR_BUDDYSHARE) { 1609 struct vmxnet3_tx_queue *tq = 1610 &adapter->tx_queue[rq - adapter->rx_queue]; 1611 vmxnet3_tq_tx_complete(tq, adapter); 1612 } 1613 1614 rxd_done = vmxnet3_rq_rx_complete(rq, adapter, budget); 1615 1616 if (rxd_done < budget) { 1617 napi_complete(napi); 1618 vmxnet3_enable_intr(adapter, rq->comp_ring.intr_idx); 1619 } 1620 return rxd_done; 1621} 1622 1623 1624#ifdef CONFIG_PCI_MSI 1625 1626/* 1627 * Handle completion interrupts on tx queues 1628 * Returns whether or not the intr is handled 1629 */ 1630 1631static irqreturn_t 1632vmxnet3_msix_tx(int irq, void *data) 1633{ 1634 struct vmxnet3_tx_queue *tq = data; 1635 struct vmxnet3_adapter *adapter = tq->adapter; 1636 1637 if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE) 1638 vmxnet3_disable_intr(adapter, tq->comp_ring.intr_idx); 1639 1640 /* Handle the case where only one irq is allocate for all tx queues */ 1641 if (adapter->share_intr == VMXNET3_INTR_TXSHARE) { 1642 int i; 1643 for (i = 0; i < adapter->num_tx_queues; i++) { 1644 struct vmxnet3_tx_queue *txq = &adapter->tx_queue[i]; 1645 vmxnet3_tq_tx_complete(txq, adapter); 1646 } 1647 } else { 1648 vmxnet3_tq_tx_complete(tq, adapter); 1649 } 1650 vmxnet3_enable_intr(adapter, tq->comp_ring.intr_idx); 1651 1652 return IRQ_HANDLED; 1653} 1654 1655 1656/* 1657 * Handle completion interrupts on rx queues. Returns whether or not the 1658 * intr is handled 1659 */ 1660 1661static irqreturn_t 1662vmxnet3_msix_rx(int irq, void *data) 1663{ 1664 struct vmxnet3_rx_queue *rq = data; 1665 struct vmxnet3_adapter *adapter = rq->adapter; 1666 1667 /* disable intr if needed */ 1668 if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE) 1669 vmxnet3_disable_intr(adapter, rq->comp_ring.intr_idx); 1670 napi_schedule(&rq->napi); 1671 1672 return IRQ_HANDLED; 1673} 1674 1675/* 1676 *---------------------------------------------------------------------------- 1677 * 1678 * vmxnet3_msix_event -- 1679 * 1680 * vmxnet3 msix event intr handler 1681 * 1682 * Result: 1683 * whether or not the intr is handled 1684 * 1685 *---------------------------------------------------------------------------- 1686 */ 1687 1688static irqreturn_t 1689vmxnet3_msix_event(int irq, void *data) 1690{ 1691 struct net_device *dev = data; 1692 struct vmxnet3_adapter *adapter = netdev_priv(dev); 1693 1694 /* disable intr if needed */ 1695 if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE) 1696 vmxnet3_disable_intr(adapter, adapter->intr.event_intr_idx); 1697 1698 if (adapter->shared->ecr) 1699 vmxnet3_process_events(adapter); 1700 1701 vmxnet3_enable_intr(adapter, adapter->intr.event_intr_idx); 1702 1703 return IRQ_HANDLED; 1704} 1705 1706#endif /* CONFIG_PCI_MSI */ 1707 1708 1709/* Interrupt handler for vmxnet3 */ 1710static irqreturn_t 1711vmxnet3_intr(int irq, void *dev_id) 1712{ 1713 struct net_device *dev = dev_id; 1714 struct vmxnet3_adapter *adapter = netdev_priv(dev); 1715 1716 if (adapter->intr.type == VMXNET3_IT_INTX) { 1717 u32 icr = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_ICR); 1718 if (unlikely(icr == 0)) 1719 /* not ours */ 1720 return IRQ_NONE; 1721 } 1722 1723 1724 /* disable intr if needed */ 1725 if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE) 1726 vmxnet3_disable_all_intrs(adapter); 1727 1728 napi_schedule(&adapter->rx_queue[0].napi); 1729 1730 return IRQ_HANDLED; 1731} 1732 1733#ifdef CONFIG_NET_POLL_CONTROLLER 1734 1735/* netpoll callback. */ 1736static void 1737vmxnet3_netpoll(struct net_device *netdev) 1738{ 1739 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 1740 1741 if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE) 1742 vmxnet3_disable_all_intrs(adapter); 1743 1744 vmxnet3_do_poll(adapter, adapter->rx_queue[0].rx_ring[0].size); 1745 vmxnet3_enable_all_intrs(adapter); 1746 1747} 1748#endif /* CONFIG_NET_POLL_CONTROLLER */ 1749 1750static int 1751vmxnet3_request_irqs(struct vmxnet3_adapter *adapter) 1752{ 1753 struct vmxnet3_intr *intr = &adapter->intr; 1754 int err = 0, i; 1755 int vector = 0; 1756 1757#ifdef CONFIG_PCI_MSI 1758 if (adapter->intr.type == VMXNET3_IT_MSIX) { 1759 for (i = 0; i < adapter->num_tx_queues; i++) { 1760 if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE) { 1761 sprintf(adapter->tx_queue[i].name, "%s-tx-%d", 1762 adapter->netdev->name, vector); 1763 err = request_irq( 1764 intr->msix_entries[vector].vector, 1765 vmxnet3_msix_tx, 0, 1766 adapter->tx_queue[i].name, 1767 &adapter->tx_queue[i]); 1768 } else { 1769 sprintf(adapter->tx_queue[i].name, "%s-rxtx-%d", 1770 adapter->netdev->name, vector); 1771 } 1772 if (err) { 1773 dev_err(&adapter->netdev->dev, 1774 "Failed to request irq for MSIX, %s, " 1775 "error %d\n", 1776 adapter->tx_queue[i].name, err); 1777 return err; 1778 } 1779 1780 /* Handle the case where only 1 MSIx was allocated for 1781 * all tx queues */ 1782 if (adapter->share_intr == VMXNET3_INTR_TXSHARE) { 1783 for (; i < adapter->num_tx_queues; i++) 1784 adapter->tx_queue[i].comp_ring.intr_idx 1785 = vector; 1786 vector++; 1787 break; 1788 } else { 1789 adapter->tx_queue[i].comp_ring.intr_idx 1790 = vector++; 1791 } 1792 } 1793 if (adapter->share_intr == VMXNET3_INTR_BUDDYSHARE) 1794 vector = 0; 1795 1796 for (i = 0; i < adapter->num_rx_queues; i++) { 1797 if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE) 1798 sprintf(adapter->rx_queue[i].name, "%s-rx-%d", 1799 adapter->netdev->name, vector); 1800 else 1801 sprintf(adapter->rx_queue[i].name, "%s-rxtx-%d", 1802 adapter->netdev->name, vector); 1803 err = request_irq(intr->msix_entries[vector].vector, 1804 vmxnet3_msix_rx, 0, 1805 adapter->rx_queue[i].name, 1806 &(adapter->rx_queue[i])); 1807 if (err) { 1808 printk(KERN_ERR "Failed to request irq for MSIX" 1809 ", %s, error %d\n", 1810 adapter->rx_queue[i].name, err); 1811 return err; 1812 } 1813 1814 adapter->rx_queue[i].comp_ring.intr_idx = vector++; 1815 } 1816 1817 sprintf(intr->event_msi_vector_name, "%s-event-%d", 1818 adapter->netdev->name, vector); 1819 err = request_irq(intr->msix_entries[vector].vector, 1820 vmxnet3_msix_event, 0, 1821 intr->event_msi_vector_name, adapter->netdev); 1822 intr->event_intr_idx = vector; 1823 1824 } else if (intr->type == VMXNET3_IT_MSI) { 1825 adapter->num_rx_queues = 1; 1826 err = request_irq(adapter->pdev->irq, vmxnet3_intr, 0, 1827 adapter->netdev->name, adapter->netdev); 1828 } else { 1829#endif 1830 adapter->num_rx_queues = 1; 1831 err = request_irq(adapter->pdev->irq, vmxnet3_intr, 1832 IRQF_SHARED, adapter->netdev->name, 1833 adapter->netdev); 1834#ifdef CONFIG_PCI_MSI 1835 } 1836#endif 1837 intr->num_intrs = vector + 1; 1838 if (err) { 1839 printk(KERN_ERR "Failed to request irq %s (intr type:%d), error" 1840 ":%d\n", adapter->netdev->name, intr->type, err); 1841 } else { 1842 /* Number of rx queues will not change after this */ 1843 for (i = 0; i < adapter->num_rx_queues; i++) { 1844 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i]; 1845 rq->qid = i; 1846 rq->qid2 = i + adapter->num_rx_queues; 1847 } 1848 1849 1850 1851 /* init our intr settings */ 1852 for (i = 0; i < intr->num_intrs; i++) 1853 intr->mod_levels[i] = UPT1_IML_ADAPTIVE; 1854 if (adapter->intr.type != VMXNET3_IT_MSIX) { 1855 adapter->intr.event_intr_idx = 0; 1856 for (i = 0; i < adapter->num_tx_queues; i++) 1857 adapter->tx_queue[i].comp_ring.intr_idx = 0; 1858 adapter->rx_queue[0].comp_ring.intr_idx = 0; 1859 } 1860 1861 printk(KERN_INFO "%s: intr type %u, mode %u, %u vectors " 1862 "allocated\n", adapter->netdev->name, intr->type, 1863 intr->mask_mode, intr->num_intrs); 1864 } 1865 1866 return err; 1867} 1868 1869 1870static void 1871vmxnet3_free_irqs(struct vmxnet3_adapter *adapter) 1872{ 1873 struct vmxnet3_intr *intr = &adapter->intr; 1874 BUG_ON(intr->type == VMXNET3_IT_AUTO || intr->num_intrs <= 0); 1875 1876 switch (intr->type) { 1877#ifdef CONFIG_PCI_MSI 1878 case VMXNET3_IT_MSIX: 1879 { 1880 int i, vector = 0; 1881 1882 if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE) { 1883 for (i = 0; i < adapter->num_tx_queues; i++) { 1884 free_irq(intr->msix_entries[vector++].vector, 1885 &(adapter->tx_queue[i])); 1886 if (adapter->share_intr == VMXNET3_INTR_TXSHARE) 1887 break; 1888 } 1889 } 1890 1891 for (i = 0; i < adapter->num_rx_queues; i++) { 1892 free_irq(intr->msix_entries[vector++].vector, 1893 &(adapter->rx_queue[i])); 1894 } 1895 1896 free_irq(intr->msix_entries[vector].vector, 1897 adapter->netdev); 1898 BUG_ON(vector >= intr->num_intrs); 1899 break; 1900 } 1901#endif 1902 case VMXNET3_IT_MSI: 1903 free_irq(adapter->pdev->irq, adapter->netdev); 1904 break; 1905 case VMXNET3_IT_INTX: 1906 free_irq(adapter->pdev->irq, adapter->netdev); 1907 break; 1908 default: 1909 BUG_ON(true); 1910 } 1911} 1912 1913 1914static void 1915vmxnet3_restore_vlan(struct vmxnet3_adapter *adapter) 1916{ 1917 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable; 1918 u16 vid; 1919 1920 /* allow untagged pkts */ 1921 VMXNET3_SET_VFTABLE_ENTRY(vfTable, 0); 1922 1923 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID) 1924 VMXNET3_SET_VFTABLE_ENTRY(vfTable, vid); 1925} 1926 1927 1928static void 1929vmxnet3_vlan_rx_add_vid(struct net_device *netdev, u16 vid) 1930{ 1931 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 1932 1933 if (!(netdev->flags & IFF_PROMISC)) { 1934 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable; 1935 unsigned long flags; 1936 1937 VMXNET3_SET_VFTABLE_ENTRY(vfTable, vid); 1938 spin_lock_irqsave(&adapter->cmd_lock, flags); 1939 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 1940 VMXNET3_CMD_UPDATE_VLAN_FILTERS); 1941 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 1942 } 1943 1944 set_bit(vid, adapter->active_vlans); 1945} 1946 1947 1948static void 1949vmxnet3_vlan_rx_kill_vid(struct net_device *netdev, u16 vid) 1950{ 1951 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 1952 1953 if (!(netdev->flags & IFF_PROMISC)) { 1954 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable; 1955 unsigned long flags; 1956 1957 VMXNET3_CLEAR_VFTABLE_ENTRY(vfTable, vid); 1958 spin_lock_irqsave(&adapter->cmd_lock, flags); 1959 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 1960 VMXNET3_CMD_UPDATE_VLAN_FILTERS); 1961 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 1962 } 1963 1964 clear_bit(vid, adapter->active_vlans); 1965} 1966 1967 1968static u8 * 1969vmxnet3_copy_mc(struct net_device *netdev) 1970{ 1971 u8 *buf = NULL; 1972 u32 sz = netdev_mc_count(netdev) * ETH_ALEN; 1973 1974 /* struct Vmxnet3_RxFilterConf.mfTableLen is u16. */ 1975 if (sz <= 0xffff) { 1976 /* We may be called with BH disabled */ 1977 buf = kmalloc(sz, GFP_ATOMIC); 1978 if (buf) { 1979 struct netdev_hw_addr *ha; 1980 int i = 0; 1981 1982 netdev_for_each_mc_addr(ha, netdev) 1983 memcpy(buf + i++ * ETH_ALEN, ha->addr, 1984 ETH_ALEN); 1985 } 1986 } 1987 return buf; 1988} 1989 1990 1991static void 1992vmxnet3_set_mc(struct net_device *netdev) 1993{ 1994 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 1995 unsigned long flags; 1996 struct Vmxnet3_RxFilterConf *rxConf = 1997 &adapter->shared->devRead.rxFilterConf; 1998 u8 *new_table = NULL; 1999 u32 new_mode = VMXNET3_RXM_UCAST; 2000 2001 if (netdev->flags & IFF_PROMISC) { 2002 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable; 2003 memset(vfTable, 0, VMXNET3_VFT_SIZE * sizeof(*vfTable)); 2004 2005 new_mode |= VMXNET3_RXM_PROMISC; 2006 } else { 2007 vmxnet3_restore_vlan(adapter); 2008 } 2009 2010 if (netdev->flags & IFF_BROADCAST) 2011 new_mode |= VMXNET3_RXM_BCAST; 2012 2013 if (netdev->flags & IFF_ALLMULTI) 2014 new_mode |= VMXNET3_RXM_ALL_MULTI; 2015 else 2016 if (!netdev_mc_empty(netdev)) { 2017 new_table = vmxnet3_copy_mc(netdev); 2018 if (new_table) { 2019 new_mode |= VMXNET3_RXM_MCAST; 2020 rxConf->mfTableLen = cpu_to_le16( 2021 netdev_mc_count(netdev) * ETH_ALEN); 2022 rxConf->mfTablePA = cpu_to_le64(virt_to_phys( 2023 new_table)); 2024 } else { 2025 printk(KERN_INFO "%s: failed to copy mcast list" 2026 ", setting ALL_MULTI\n", netdev->name); 2027 new_mode |= VMXNET3_RXM_ALL_MULTI; 2028 } 2029 } 2030 2031 2032 if (!(new_mode & VMXNET3_RXM_MCAST)) { 2033 rxConf->mfTableLen = 0; 2034 rxConf->mfTablePA = 0; 2035 } 2036 2037 spin_lock_irqsave(&adapter->cmd_lock, flags); 2038 if (new_mode != rxConf->rxMode) { 2039 rxConf->rxMode = cpu_to_le32(new_mode); 2040 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 2041 VMXNET3_CMD_UPDATE_RX_MODE); 2042 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 2043 VMXNET3_CMD_UPDATE_VLAN_FILTERS); 2044 } 2045 2046 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 2047 VMXNET3_CMD_UPDATE_MAC_FILTERS); 2048 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 2049 2050 kfree(new_table); 2051} 2052 2053void 2054vmxnet3_rq_destroy_all(struct vmxnet3_adapter *adapter) 2055{ 2056 int i; 2057 2058 for (i = 0; i < adapter->num_rx_queues; i++) 2059 vmxnet3_rq_destroy(&adapter->rx_queue[i], adapter); 2060} 2061 2062 2063/* 2064 * Set up driver_shared based on settings in adapter. 2065 */ 2066 2067static void 2068vmxnet3_setup_driver_shared(struct vmxnet3_adapter *adapter) 2069{ 2070 struct Vmxnet3_DriverShared *shared = adapter->shared; 2071 struct Vmxnet3_DSDevRead *devRead = &shared->devRead; 2072 struct Vmxnet3_TxQueueConf *tqc; 2073 struct Vmxnet3_RxQueueConf *rqc; 2074 int i; 2075 2076 memset(shared, 0, sizeof(*shared)); 2077 2078 /* driver settings */ 2079 shared->magic = cpu_to_le32(VMXNET3_REV1_MAGIC); 2080 devRead->misc.driverInfo.version = cpu_to_le32( 2081 VMXNET3_DRIVER_VERSION_NUM); 2082 devRead->misc.driverInfo.gos.gosBits = (sizeof(void *) == 4 ? 2083 VMXNET3_GOS_BITS_32 : VMXNET3_GOS_BITS_64); 2084 devRead->misc.driverInfo.gos.gosType = VMXNET3_GOS_TYPE_LINUX; 2085 *((u32 *)&devRead->misc.driverInfo.gos) = cpu_to_le32( 2086 *((u32 *)&devRead->misc.driverInfo.gos)); 2087 devRead->misc.driverInfo.vmxnet3RevSpt = cpu_to_le32(1); 2088 devRead->misc.driverInfo.uptVerSpt = cpu_to_le32(1); 2089 2090 devRead->misc.ddPA = cpu_to_le64(virt_to_phys(adapter)); 2091 devRead->misc.ddLen = cpu_to_le32(sizeof(struct vmxnet3_adapter)); 2092 2093 /* set up feature flags */ 2094 if (adapter->netdev->features & NETIF_F_RXCSUM) 2095 devRead->misc.uptFeatures |= UPT1_F_RXCSUM; 2096 2097 if (adapter->netdev->features & NETIF_F_LRO) { 2098 devRead->misc.uptFeatures |= UPT1_F_LRO; 2099 devRead->misc.maxNumRxSG = cpu_to_le16(1 + MAX_SKB_FRAGS); 2100 } 2101 if (adapter->netdev->features & NETIF_F_HW_VLAN_RX) 2102 devRead->misc.uptFeatures |= UPT1_F_RXVLAN; 2103 2104 devRead->misc.mtu = cpu_to_le32(adapter->netdev->mtu); 2105 devRead->misc.queueDescPA = cpu_to_le64(adapter->queue_desc_pa); 2106 devRead->misc.queueDescLen = cpu_to_le32( 2107 adapter->num_tx_queues * sizeof(struct Vmxnet3_TxQueueDesc) + 2108 adapter->num_rx_queues * sizeof(struct Vmxnet3_RxQueueDesc)); 2109 2110 /* tx queue settings */ 2111 devRead->misc.numTxQueues = adapter->num_tx_queues; 2112 for (i = 0; i < adapter->num_tx_queues; i++) { 2113 struct vmxnet3_tx_queue *tq = &adapter->tx_queue[i]; 2114 BUG_ON(adapter->tx_queue[i].tx_ring.base == NULL); 2115 tqc = &adapter->tqd_start[i].conf; 2116 tqc->txRingBasePA = cpu_to_le64(tq->tx_ring.basePA); 2117 tqc->dataRingBasePA = cpu_to_le64(tq->data_ring.basePA); 2118 tqc->compRingBasePA = cpu_to_le64(tq->comp_ring.basePA); 2119 tqc->ddPA = cpu_to_le64(virt_to_phys(tq->buf_info)); 2120 tqc->txRingSize = cpu_to_le32(tq->tx_ring.size); 2121 tqc->dataRingSize = cpu_to_le32(tq->data_ring.size); 2122 tqc->compRingSize = cpu_to_le32(tq->comp_ring.size); 2123 tqc->ddLen = cpu_to_le32( 2124 sizeof(struct vmxnet3_tx_buf_info) * 2125 tqc->txRingSize); 2126 tqc->intrIdx = tq->comp_ring.intr_idx; 2127 } 2128 2129 /* rx queue settings */ 2130 devRead->misc.numRxQueues = adapter->num_rx_queues; 2131 for (i = 0; i < adapter->num_rx_queues; i++) { 2132 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i]; 2133 rqc = &adapter->rqd_start[i].conf; 2134 rqc->rxRingBasePA[0] = cpu_to_le64(rq->rx_ring[0].basePA); 2135 rqc->rxRingBasePA[1] = cpu_to_le64(rq->rx_ring[1].basePA); 2136 rqc->compRingBasePA = cpu_to_le64(rq->comp_ring.basePA); 2137 rqc->ddPA = cpu_to_le64(virt_to_phys( 2138 rq->buf_info)); 2139 rqc->rxRingSize[0] = cpu_to_le32(rq->rx_ring[0].size); 2140 rqc->rxRingSize[1] = cpu_to_le32(rq->rx_ring[1].size); 2141 rqc->compRingSize = cpu_to_le32(rq->comp_ring.size); 2142 rqc->ddLen = cpu_to_le32( 2143 sizeof(struct vmxnet3_rx_buf_info) * 2144 (rqc->rxRingSize[0] + 2145 rqc->rxRingSize[1])); 2146 rqc->intrIdx = rq->comp_ring.intr_idx; 2147 } 2148 2149#ifdef VMXNET3_RSS 2150 memset(adapter->rss_conf, 0, sizeof(*adapter->rss_conf)); 2151 2152 if (adapter->rss) { 2153 struct UPT1_RSSConf *rssConf = adapter->rss_conf; 2154 devRead->misc.uptFeatures |= UPT1_F_RSS; 2155 devRead->misc.numRxQueues = adapter->num_rx_queues; 2156 rssConf->hashType = UPT1_RSS_HASH_TYPE_TCP_IPV4 | 2157 UPT1_RSS_HASH_TYPE_IPV4 | 2158 UPT1_RSS_HASH_TYPE_TCP_IPV6 | 2159 UPT1_RSS_HASH_TYPE_IPV6; 2160 rssConf->hashFunc = UPT1_RSS_HASH_FUNC_TOEPLITZ; 2161 rssConf->hashKeySize = UPT1_RSS_MAX_KEY_SIZE; 2162 rssConf->indTableSize = VMXNET3_RSS_IND_TABLE_SIZE; 2163 get_random_bytes(&rssConf->hashKey[0], rssConf->hashKeySize); 2164 for (i = 0; i < rssConf->indTableSize; i++) 2165 rssConf->indTable[i] = i % adapter->num_rx_queues; 2166 2167 devRead->rssConfDesc.confVer = 1; 2168 devRead->rssConfDesc.confLen = sizeof(*rssConf); 2169 devRead->rssConfDesc.confPA = virt_to_phys(rssConf); 2170 } 2171 2172#endif /* VMXNET3_RSS */ 2173 2174 /* intr settings */ 2175 devRead->intrConf.autoMask = adapter->intr.mask_mode == 2176 VMXNET3_IMM_AUTO; 2177 devRead->intrConf.numIntrs = adapter->intr.num_intrs; 2178 for (i = 0; i < adapter->intr.num_intrs; i++) 2179 devRead->intrConf.modLevels[i] = adapter->intr.mod_levels[i]; 2180 2181 devRead->intrConf.eventIntrIdx = adapter->intr.event_intr_idx; 2182 devRead->intrConf.intrCtrl |= cpu_to_le32(VMXNET3_IC_DISABLE_ALL); 2183 2184 /* rx filter settings */ 2185 devRead->rxFilterConf.rxMode = 0; 2186 vmxnet3_restore_vlan(adapter); 2187 vmxnet3_write_mac_addr(adapter, adapter->netdev->dev_addr); 2188 2189 /* the rest are already zeroed */ 2190} 2191 2192 2193int 2194vmxnet3_activate_dev(struct vmxnet3_adapter *adapter) 2195{ 2196 int err, i; 2197 u32 ret; 2198 unsigned long flags; 2199 2200 dev_dbg(&adapter->netdev->dev, "%s: skb_buf_size %d, rx_buf_per_pkt %d," 2201 " ring sizes %u %u %u\n", adapter->netdev->name, 2202 adapter->skb_buf_size, adapter->rx_buf_per_pkt, 2203 adapter->tx_queue[0].tx_ring.size, 2204 adapter->rx_queue[0].rx_ring[0].size, 2205 adapter->rx_queue[0].rx_ring[1].size); 2206 2207 vmxnet3_tq_init_all(adapter); 2208 err = vmxnet3_rq_init_all(adapter); 2209 if (err) { 2210 printk(KERN_ERR "Failed to init rx queue for %s: error %d\n", 2211 adapter->netdev->name, err); 2212 goto rq_err; 2213 } 2214 2215 err = vmxnet3_request_irqs(adapter); 2216 if (err) { 2217 printk(KERN_ERR "Failed to setup irq for %s: error %d\n", 2218 adapter->netdev->name, err); 2219 goto irq_err; 2220 } 2221 2222 vmxnet3_setup_driver_shared(adapter); 2223 2224 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAL, VMXNET3_GET_ADDR_LO( 2225 adapter->shared_pa)); 2226 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAH, VMXNET3_GET_ADDR_HI( 2227 adapter->shared_pa)); 2228 spin_lock_irqsave(&adapter->cmd_lock, flags); 2229 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 2230 VMXNET3_CMD_ACTIVATE_DEV); 2231 ret = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD); 2232 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 2233 2234 if (ret != 0) { 2235 printk(KERN_ERR "Failed to activate dev %s: error %u\n", 2236 adapter->netdev->name, ret); 2237 err = -EINVAL; 2238 goto activate_err; 2239 } 2240 2241 for (i = 0; i < adapter->num_rx_queues; i++) { 2242 VMXNET3_WRITE_BAR0_REG(adapter, 2243 VMXNET3_REG_RXPROD + i * VMXNET3_REG_ALIGN, 2244 adapter->rx_queue[i].rx_ring[0].next2fill); 2245 VMXNET3_WRITE_BAR0_REG(adapter, (VMXNET3_REG_RXPROD2 + 2246 (i * VMXNET3_REG_ALIGN)), 2247 adapter->rx_queue[i].rx_ring[1].next2fill); 2248 } 2249 2250 /* Apply the rx filter settins last. */ 2251 vmxnet3_set_mc(adapter->netdev); 2252 2253 /* 2254 * Check link state when first activating device. It will start the 2255 * tx queue if the link is up. 2256 */ 2257 vmxnet3_check_link(adapter, true); 2258 for (i = 0; i < adapter->num_rx_queues; i++) 2259 napi_enable(&adapter->rx_queue[i].napi); 2260 vmxnet3_enable_all_intrs(adapter); 2261 clear_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state); 2262 return 0; 2263 2264activate_err: 2265 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAL, 0); 2266 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAH, 0); 2267 vmxnet3_free_irqs(adapter); 2268irq_err: 2269rq_err: 2270 /* free up buffers we allocated */ 2271 vmxnet3_rq_cleanup_all(adapter); 2272 return err; 2273} 2274 2275 2276void 2277vmxnet3_reset_dev(struct vmxnet3_adapter *adapter) 2278{ 2279 unsigned long flags; 2280 spin_lock_irqsave(&adapter->cmd_lock, flags); 2281 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_RESET_DEV); 2282 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 2283} 2284 2285 2286int 2287vmxnet3_quiesce_dev(struct vmxnet3_adapter *adapter) 2288{ 2289 int i; 2290 unsigned long flags; 2291 if (test_and_set_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state)) 2292 return 0; 2293 2294 2295 spin_lock_irqsave(&adapter->cmd_lock, flags); 2296 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 2297 VMXNET3_CMD_QUIESCE_DEV); 2298 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 2299 vmxnet3_disable_all_intrs(adapter); 2300 2301 for (i = 0; i < adapter->num_rx_queues; i++) 2302 napi_disable(&adapter->rx_queue[i].napi); 2303 netif_tx_disable(adapter->netdev); 2304 adapter->link_speed = 0; 2305 netif_carrier_off(adapter->netdev); 2306 2307 vmxnet3_tq_cleanup_all(adapter); 2308 vmxnet3_rq_cleanup_all(adapter); 2309 vmxnet3_free_irqs(adapter); 2310 return 0; 2311} 2312 2313 2314static void 2315vmxnet3_write_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac) 2316{ 2317 u32 tmp; 2318 2319 tmp = *(u32 *)mac; 2320 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_MACL, tmp); 2321 2322 tmp = (mac[5] << 8) | mac[4]; 2323 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_MACH, tmp); 2324} 2325 2326 2327static int 2328vmxnet3_set_mac_addr(struct net_device *netdev, void *p) 2329{ 2330 struct sockaddr *addr = p; 2331 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 2332 2333 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); 2334 vmxnet3_write_mac_addr(adapter, addr->sa_data); 2335 2336 return 0; 2337} 2338 2339 2340/* ==================== initialization and cleanup routines ============ */ 2341 2342static int 2343vmxnet3_alloc_pci_resources(struct vmxnet3_adapter *adapter, bool *dma64) 2344{ 2345 int err; 2346 unsigned long mmio_start, mmio_len; 2347 struct pci_dev *pdev = adapter->pdev; 2348 2349 err = pci_enable_device(pdev); 2350 if (err) { 2351 printk(KERN_ERR "Failed to enable adapter %s: error %d\n", 2352 pci_name(pdev), err); 2353 return err; 2354 } 2355 2356 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) == 0) { 2357 if (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)) != 0) { 2358 printk(KERN_ERR "pci_set_consistent_dma_mask failed " 2359 "for adapter %s\n", pci_name(pdev)); 2360 err = -EIO; 2361 goto err_set_mask; 2362 } 2363 *dma64 = true; 2364 } else { 2365 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) { 2366 printk(KERN_ERR "pci_set_dma_mask failed for adapter " 2367 "%s\n", pci_name(pdev)); 2368 err = -EIO; 2369 goto err_set_mask; 2370 } 2371 *dma64 = false; 2372 } 2373 2374 err = pci_request_selected_regions(pdev, (1 << 2) - 1, 2375 vmxnet3_driver_name); 2376 if (err) { 2377 printk(KERN_ERR "Failed to request region for adapter %s: " 2378 "error %d\n", pci_name(pdev), err); 2379 goto err_set_mask; 2380 } 2381 2382 pci_set_master(pdev); 2383 2384 mmio_start = pci_resource_start(pdev, 0); 2385 mmio_len = pci_resource_len(pdev, 0); 2386 adapter->hw_addr0 = ioremap(mmio_start, mmio_len); 2387 if (!adapter->hw_addr0) { 2388 printk(KERN_ERR "Failed to map bar0 for adapter %s\n", 2389 pci_name(pdev)); 2390 err = -EIO; 2391 goto err_ioremap; 2392 } 2393 2394 mmio_start = pci_resource_start(pdev, 1); 2395 mmio_len = pci_resource_len(pdev, 1); 2396 adapter->hw_addr1 = ioremap(mmio_start, mmio_len); 2397 if (!adapter->hw_addr1) { 2398 printk(KERN_ERR "Failed to map bar1 for adapter %s\n", 2399 pci_name(pdev)); 2400 err = -EIO; 2401 goto err_bar1; 2402 } 2403 return 0; 2404 2405err_bar1: 2406 iounmap(adapter->hw_addr0); 2407err_ioremap: 2408 pci_release_selected_regions(pdev, (1 << 2) - 1); 2409err_set_mask: 2410 pci_disable_device(pdev); 2411 return err; 2412} 2413 2414 2415static void 2416vmxnet3_free_pci_resources(struct vmxnet3_adapter *adapter) 2417{ 2418 BUG_ON(!adapter->pdev); 2419 2420 iounmap(adapter->hw_addr0); 2421 iounmap(adapter->hw_addr1); 2422 pci_release_selected_regions(adapter->pdev, (1 << 2) - 1); 2423 pci_disable_device(adapter->pdev); 2424} 2425 2426 2427static void 2428vmxnet3_adjust_rx_ring_size(struct vmxnet3_adapter *adapter) 2429{ 2430 size_t sz, i, ring0_size, ring1_size, comp_size; 2431 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[0]; 2432 2433 2434 if (adapter->netdev->mtu <= VMXNET3_MAX_SKB_BUF_SIZE - 2435 VMXNET3_MAX_ETH_HDR_SIZE) { 2436 adapter->skb_buf_size = adapter->netdev->mtu + 2437 VMXNET3_MAX_ETH_HDR_SIZE; 2438 if (adapter->skb_buf_size < VMXNET3_MIN_T0_BUF_SIZE) 2439 adapter->skb_buf_size = VMXNET3_MIN_T0_BUF_SIZE; 2440 2441 adapter->rx_buf_per_pkt = 1; 2442 } else { 2443 adapter->skb_buf_size = VMXNET3_MAX_SKB_BUF_SIZE; 2444 sz = adapter->netdev->mtu - VMXNET3_MAX_SKB_BUF_SIZE + 2445 VMXNET3_MAX_ETH_HDR_SIZE; 2446 adapter->rx_buf_per_pkt = 1 + (sz + PAGE_SIZE - 1) / PAGE_SIZE; 2447 } 2448 2449 /* 2450 * for simplicity, force the ring0 size to be a multiple of 2451 * rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN 2452 */ 2453 sz = adapter->rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN; 2454 ring0_size = adapter->rx_queue[0].rx_ring[0].size; 2455 ring0_size = (ring0_size + sz - 1) / sz * sz; 2456 ring0_size = min_t(u32, ring0_size, VMXNET3_RX_RING_MAX_SIZE / 2457 sz * sz); 2458 ring1_size = adapter->rx_queue[0].rx_ring[1].size; 2459 comp_size = ring0_size + ring1_size; 2460 2461 for (i = 0; i < adapter->num_rx_queues; i++) { 2462 rq = &adapter->rx_queue[i]; 2463 rq->rx_ring[0].size = ring0_size; 2464 rq->rx_ring[1].size = ring1_size; 2465 rq->comp_ring.size = comp_size; 2466 } 2467} 2468 2469 2470int 2471vmxnet3_create_queues(struct vmxnet3_adapter *adapter, u32 tx_ring_size, 2472 u32 rx_ring_size, u32 rx_ring2_size) 2473{ 2474 int err = 0, i; 2475 2476 for (i = 0; i < adapter->num_tx_queues; i++) { 2477 struct vmxnet3_tx_queue *tq = &adapter->tx_queue[i]; 2478 tq->tx_ring.size = tx_ring_size; 2479 tq->data_ring.size = tx_ring_size; 2480 tq->comp_ring.size = tx_ring_size; 2481 tq->shared = &adapter->tqd_start[i].ctrl; 2482 tq->stopped = true; 2483 tq->adapter = adapter; 2484 tq->qid = i; 2485 err = vmxnet3_tq_create(tq, adapter); 2486 /* 2487 * Too late to change num_tx_queues. We cannot do away with 2488 * lesser number of queues than what we asked for 2489 */ 2490 if (err) 2491 goto queue_err; 2492 } 2493 2494 adapter->rx_queue[0].rx_ring[0].size = rx_ring_size; 2495 adapter->rx_queue[0].rx_ring[1].size = rx_ring2_size; 2496 vmxnet3_adjust_rx_ring_size(adapter); 2497 for (i = 0; i < adapter->num_rx_queues; i++) { 2498 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i]; 2499 /* qid and qid2 for rx queues will be assigned later when num 2500 * of rx queues is finalized after allocating intrs */ 2501 rq->shared = &adapter->rqd_start[i].ctrl; 2502 rq->adapter = adapter; 2503 err = vmxnet3_rq_create(rq, adapter); 2504 if (err) { 2505 if (i == 0) { 2506 printk(KERN_ERR "Could not allocate any rx" 2507 "queues. Aborting.\n"); 2508 goto queue_err; 2509 } else { 2510 printk(KERN_INFO "Number of rx queues changed " 2511 "to : %d.\n", i); 2512 adapter->num_rx_queues = i; 2513 err = 0; 2514 break; 2515 } 2516 } 2517 } 2518 return err; 2519queue_err: 2520 vmxnet3_tq_destroy_all(adapter); 2521 return err; 2522} 2523 2524static int 2525vmxnet3_open(struct net_device *netdev) 2526{ 2527 struct vmxnet3_adapter *adapter; 2528 int err, i; 2529 2530 adapter = netdev_priv(netdev); 2531 2532 for (i = 0; i < adapter->num_tx_queues; i++) 2533 spin_lock_init(&adapter->tx_queue[i].tx_lock); 2534 2535 err = vmxnet3_create_queues(adapter, VMXNET3_DEF_TX_RING_SIZE, 2536 VMXNET3_DEF_RX_RING_SIZE, 2537 VMXNET3_DEF_RX_RING_SIZE); 2538 if (err) 2539 goto queue_err; 2540 2541 err = vmxnet3_activate_dev(adapter); 2542 if (err) 2543 goto activate_err; 2544 2545 return 0; 2546 2547activate_err: 2548 vmxnet3_rq_destroy_all(adapter); 2549 vmxnet3_tq_destroy_all(adapter); 2550queue_err: 2551 return err; 2552} 2553 2554 2555static int 2556vmxnet3_close(struct net_device *netdev) 2557{ 2558 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 2559 2560 /* 2561 * Reset_work may be in the middle of resetting the device, wait for its 2562 * completion. 2563 */ 2564 while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state)) 2565 msleep(1); 2566 2567 vmxnet3_quiesce_dev(adapter); 2568 2569 vmxnet3_rq_destroy_all(adapter); 2570 vmxnet3_tq_destroy_all(adapter); 2571 2572 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state); 2573 2574 2575 return 0; 2576} 2577 2578 2579void 2580vmxnet3_force_close(struct vmxnet3_adapter *adapter) 2581{ 2582 int i; 2583 2584 /* 2585 * we must clear VMXNET3_STATE_BIT_RESETTING, otherwise 2586 * vmxnet3_close() will deadlock. 2587 */ 2588 BUG_ON(test_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state)); 2589 2590 /* we need to enable NAPI, otherwise dev_close will deadlock */ 2591 for (i = 0; i < adapter->num_rx_queues; i++) 2592 napi_enable(&adapter->rx_queue[i].napi); 2593 dev_close(adapter->netdev); 2594} 2595 2596 2597static int 2598vmxnet3_change_mtu(struct net_device *netdev, int new_mtu) 2599{ 2600 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 2601 int err = 0; 2602 2603 if (new_mtu < VMXNET3_MIN_MTU || new_mtu > VMXNET3_MAX_MTU) 2604 return -EINVAL; 2605 2606 netdev->mtu = new_mtu; 2607 2608 /* 2609 * Reset_work may be in the middle of resetting the device, wait for its 2610 * completion. 2611 */ 2612 while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state)) 2613 msleep(1); 2614 2615 if (netif_running(netdev)) { 2616 vmxnet3_quiesce_dev(adapter); 2617 vmxnet3_reset_dev(adapter); 2618 2619 /* we need to re-create the rx queue based on the new mtu */ 2620 vmxnet3_rq_destroy_all(adapter); 2621 vmxnet3_adjust_rx_ring_size(adapter); 2622 err = vmxnet3_rq_create_all(adapter); 2623 if (err) { 2624 printk(KERN_ERR "%s: failed to re-create rx queues," 2625 " error %d. Closing it.\n", netdev->name, err); 2626 goto out; 2627 } 2628 2629 err = vmxnet3_activate_dev(adapter); 2630 if (err) { 2631 printk(KERN_ERR "%s: failed to re-activate, error %d. " 2632 "Closing it\n", netdev->name, err); 2633 goto out; 2634 } 2635 } 2636 2637out: 2638 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state); 2639 if (err) 2640 vmxnet3_force_close(adapter); 2641 2642 return err; 2643} 2644 2645 2646static void 2647vmxnet3_declare_features(struct vmxnet3_adapter *adapter, bool dma64) 2648{ 2649 struct net_device *netdev = adapter->netdev; 2650 2651 netdev->hw_features = NETIF_F_SG | NETIF_F_RXCSUM | 2652 NETIF_F_HW_CSUM | NETIF_F_HW_VLAN_TX | 2653 NETIF_F_HW_VLAN_RX | NETIF_F_TSO | NETIF_F_TSO6 | 2654 NETIF_F_LRO; 2655 if (dma64) 2656 netdev->hw_features |= NETIF_F_HIGHDMA; 2657 netdev->vlan_features = netdev->hw_features & 2658 ~(NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX); 2659 netdev->features = netdev->hw_features | NETIF_F_HW_VLAN_FILTER; 2660 2661 netdev_info(adapter->netdev, 2662 "features: sg csum vlan jf tso tsoIPv6 lro%s\n", 2663 dma64 ? " highDMA" : ""); 2664} 2665 2666 2667static void 2668vmxnet3_read_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac) 2669{ 2670 u32 tmp; 2671 2672 tmp = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_MACL); 2673 *(u32 *)mac = tmp; 2674 2675 tmp = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_MACH); 2676 mac[4] = tmp & 0xff; 2677 mac[5] = (tmp >> 8) & 0xff; 2678} 2679 2680#ifdef CONFIG_PCI_MSI 2681 2682/* 2683 * Enable MSIx vectors. 2684 * Returns : 2685 * 0 on successful enabling of required vectors, 2686 * VMXNET3_LINUX_MIN_MSIX_VECT when only minimum number of vectors required 2687 * could be enabled. 2688 * number of vectors which can be enabled otherwise (this number is smaller 2689 * than VMXNET3_LINUX_MIN_MSIX_VECT) 2690 */ 2691 2692static int 2693vmxnet3_acquire_msix_vectors(struct vmxnet3_adapter *adapter, 2694 int vectors) 2695{ 2696 int err = 0, vector_threshold; 2697 vector_threshold = VMXNET3_LINUX_MIN_MSIX_VECT; 2698 2699 while (vectors >= vector_threshold) { 2700 err = pci_enable_msix(adapter->pdev, adapter->intr.msix_entries, 2701 vectors); 2702 if (!err) { 2703 adapter->intr.num_intrs = vectors; 2704 return 0; 2705 } else if (err < 0) { 2706 printk(KERN_ERR "Failed to enable MSI-X for %s, error" 2707 " %d\n", adapter->netdev->name, err); 2708 vectors = 0; 2709 } else if (err < vector_threshold) { 2710 break; 2711 } else { 2712 /* If fails to enable required number of MSI-x vectors 2713 * try enabling minimum number of vectors required. 2714 */ 2715 vectors = vector_threshold; 2716 printk(KERN_ERR "Failed to enable %d MSI-X for %s, try" 2717 " %d instead\n", vectors, adapter->netdev->name, 2718 vector_threshold); 2719 } 2720 } 2721 2722 printk(KERN_INFO "Number of MSI-X interrupts which can be allocatedi" 2723 " are lower than min threshold required.\n"); 2724 return err; 2725} 2726 2727 2728#endif /* CONFIG_PCI_MSI */ 2729 2730static void 2731vmxnet3_alloc_intr_resources(struct vmxnet3_adapter *adapter) 2732{ 2733 u32 cfg; 2734 unsigned long flags; 2735 2736 /* intr settings */ 2737 spin_lock_irqsave(&adapter->cmd_lock, flags); 2738 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 2739 VMXNET3_CMD_GET_CONF_INTR); 2740 cfg = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD); 2741 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 2742 adapter->intr.type = cfg & 0x3; 2743 adapter->intr.mask_mode = (cfg >> 2) & 0x3; 2744 2745 if (adapter->intr.type == VMXNET3_IT_AUTO) { 2746 adapter->intr.type = VMXNET3_IT_MSIX; 2747 } 2748 2749#ifdef CONFIG_PCI_MSI 2750 if (adapter->intr.type == VMXNET3_IT_MSIX) { 2751 int vector, err = 0; 2752 2753 adapter->intr.num_intrs = (adapter->share_intr == 2754 VMXNET3_INTR_TXSHARE) ? 1 : 2755 adapter->num_tx_queues; 2756 adapter->intr.num_intrs += (adapter->share_intr == 2757 VMXNET3_INTR_BUDDYSHARE) ? 0 : 2758 adapter->num_rx_queues; 2759 adapter->intr.num_intrs += 1; /* for link event */ 2760 2761 adapter->intr.num_intrs = (adapter->intr.num_intrs > 2762 VMXNET3_LINUX_MIN_MSIX_VECT 2763 ? adapter->intr.num_intrs : 2764 VMXNET3_LINUX_MIN_MSIX_VECT); 2765 2766 for (vector = 0; vector < adapter->intr.num_intrs; vector++) 2767 adapter->intr.msix_entries[vector].entry = vector; 2768 2769 err = vmxnet3_acquire_msix_vectors(adapter, 2770 adapter->intr.num_intrs); 2771 /* If we cannot allocate one MSIx vector per queue 2772 * then limit the number of rx queues to 1 2773 */ 2774 if (err == VMXNET3_LINUX_MIN_MSIX_VECT) { 2775 if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE 2776 || adapter->num_rx_queues != 1) { 2777 adapter->share_intr = VMXNET3_INTR_TXSHARE; 2778 printk(KERN_ERR "Number of rx queues : 1\n"); 2779 adapter->num_rx_queues = 1; 2780 adapter->intr.num_intrs = 2781 VMXNET3_LINUX_MIN_MSIX_VECT; 2782 } 2783 return; 2784 } 2785 if (!err) 2786 return; 2787 2788 /* If we cannot allocate MSIx vectors use only one rx queue */ 2789 printk(KERN_INFO "Failed to enable MSI-X for %s, error %d." 2790 "#rx queues : 1, try MSI\n", adapter->netdev->name, err); 2791 2792 adapter->intr.type = VMXNET3_IT_MSI; 2793 } 2794 2795 if (adapter->intr.type == VMXNET3_IT_MSI) { 2796 int err; 2797 err = pci_enable_msi(adapter->pdev); 2798 if (!err) { 2799 adapter->num_rx_queues = 1; 2800 adapter->intr.num_intrs = 1; 2801 return; 2802 } 2803 } 2804#endif /* CONFIG_PCI_MSI */ 2805 2806 adapter->num_rx_queues = 1; 2807 printk(KERN_INFO "Using INTx interrupt, #Rx queues: 1.\n"); 2808 adapter->intr.type = VMXNET3_IT_INTX; 2809 2810 /* INT-X related setting */ 2811 adapter->intr.num_intrs = 1; 2812} 2813 2814 2815static void 2816vmxnet3_free_intr_resources(struct vmxnet3_adapter *adapter) 2817{ 2818 if (adapter->intr.type == VMXNET3_IT_MSIX) 2819 pci_disable_msix(adapter->pdev); 2820 else if (adapter->intr.type == VMXNET3_IT_MSI) 2821 pci_disable_msi(adapter->pdev); 2822 else 2823 BUG_ON(adapter->intr.type != VMXNET3_IT_INTX); 2824} 2825 2826 2827static void 2828vmxnet3_tx_timeout(struct net_device *netdev) 2829{ 2830 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 2831 adapter->tx_timeout_count++; 2832 2833 printk(KERN_ERR "%s: tx hang\n", adapter->netdev->name); 2834 schedule_work(&adapter->work); 2835 netif_wake_queue(adapter->netdev); 2836} 2837 2838 2839static void 2840vmxnet3_reset_work(struct work_struct *data) 2841{ 2842 struct vmxnet3_adapter *adapter; 2843 2844 adapter = container_of(data, struct vmxnet3_adapter, work); 2845 2846 /* if another thread is resetting the device, no need to proceed */ 2847 if (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state)) 2848 return; 2849 2850 /* if the device is closed, we must leave it alone */ 2851 rtnl_lock(); 2852 if (netif_running(adapter->netdev)) { 2853 printk(KERN_INFO "%s: resetting\n", adapter->netdev->name); 2854 vmxnet3_quiesce_dev(adapter); 2855 vmxnet3_reset_dev(adapter); 2856 vmxnet3_activate_dev(adapter); 2857 } else { 2858 printk(KERN_INFO "%s: already closed\n", adapter->netdev->name); 2859 } 2860 rtnl_unlock(); 2861 2862 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state); 2863} 2864 2865 2866static int __devinit 2867vmxnet3_probe_device(struct pci_dev *pdev, 2868 const struct pci_device_id *id) 2869{ 2870 static const struct net_device_ops vmxnet3_netdev_ops = { 2871 .ndo_open = vmxnet3_open, 2872 .ndo_stop = vmxnet3_close, 2873 .ndo_start_xmit = vmxnet3_xmit_frame, 2874 .ndo_set_mac_address = vmxnet3_set_mac_addr, 2875 .ndo_change_mtu = vmxnet3_change_mtu, 2876 .ndo_set_features = vmxnet3_set_features, 2877 .ndo_get_stats64 = vmxnet3_get_stats64, 2878 .ndo_tx_timeout = vmxnet3_tx_timeout, 2879 .ndo_set_multicast_list = vmxnet3_set_mc, 2880 .ndo_vlan_rx_add_vid = vmxnet3_vlan_rx_add_vid, 2881 .ndo_vlan_rx_kill_vid = vmxnet3_vlan_rx_kill_vid, 2882#ifdef CONFIG_NET_POLL_CONTROLLER 2883 .ndo_poll_controller = vmxnet3_netpoll, 2884#endif 2885 }; 2886 int err; 2887 bool dma64 = false; /* stupid gcc */ 2888 u32 ver; 2889 struct net_device *netdev; 2890 struct vmxnet3_adapter *adapter; 2891 u8 mac[ETH_ALEN]; 2892 int size; 2893 int num_tx_queues; 2894 int num_rx_queues; 2895 2896 if (!pci_msi_enabled()) 2897 enable_mq = 0; 2898 2899#ifdef VMXNET3_RSS 2900 if (enable_mq) 2901 num_rx_queues = min(VMXNET3_DEVICE_MAX_RX_QUEUES, 2902 (int)num_online_cpus()); 2903 else 2904#endif 2905 num_rx_queues = 1; 2906 num_rx_queues = rounddown_pow_of_two(num_rx_queues); 2907 2908 if (enable_mq) 2909 num_tx_queues = min(VMXNET3_DEVICE_MAX_TX_QUEUES, 2910 (int)num_online_cpus()); 2911 else 2912 num_tx_queues = 1; 2913 2914 num_tx_queues = rounddown_pow_of_two(num_tx_queues); 2915 netdev = alloc_etherdev_mq(sizeof(struct vmxnet3_adapter), 2916 max(num_tx_queues, num_rx_queues)); 2917 printk(KERN_INFO "# of Tx queues : %d, # of Rx queues : %d\n", 2918 num_tx_queues, num_rx_queues); 2919 2920 if (!netdev) { 2921 printk(KERN_ERR "Failed to alloc ethernet device for adapter " 2922 "%s\n", pci_name(pdev)); 2923 return -ENOMEM; 2924 } 2925 2926 pci_set_drvdata(pdev, netdev); 2927 adapter = netdev_priv(netdev); 2928 adapter->netdev = netdev; 2929 adapter->pdev = pdev; 2930 2931 spin_lock_init(&adapter->cmd_lock); 2932 adapter->shared = pci_alloc_consistent(adapter->pdev, 2933 sizeof(struct Vmxnet3_DriverShared), 2934 &adapter->shared_pa); 2935 if (!adapter->shared) { 2936 printk(KERN_ERR "Failed to allocate memory for %s\n", 2937 pci_name(pdev)); 2938 err = -ENOMEM; 2939 goto err_alloc_shared; 2940 } 2941 2942 adapter->num_rx_queues = num_rx_queues; 2943 adapter->num_tx_queues = num_tx_queues; 2944 2945 size = sizeof(struct Vmxnet3_TxQueueDesc) * adapter->num_tx_queues; 2946 size += sizeof(struct Vmxnet3_RxQueueDesc) * adapter->num_rx_queues; 2947 adapter->tqd_start = pci_alloc_consistent(adapter->pdev, size, 2948 &adapter->queue_desc_pa); 2949 2950 if (!adapter->tqd_start) { 2951 printk(KERN_ERR "Failed to allocate memory for %s\n", 2952 pci_name(pdev)); 2953 err = -ENOMEM; 2954 goto err_alloc_queue_desc; 2955 } 2956 adapter->rqd_start = (struct Vmxnet3_RxQueueDesc *)(adapter->tqd_start + 2957 adapter->num_tx_queues); 2958 2959 adapter->pm_conf = kmalloc(sizeof(struct Vmxnet3_PMConf), GFP_KERNEL); 2960 if (adapter->pm_conf == NULL) { 2961 printk(KERN_ERR "Failed to allocate memory for %s\n", 2962 pci_name(pdev)); 2963 err = -ENOMEM; 2964 goto err_alloc_pm; 2965 } 2966 2967#ifdef VMXNET3_RSS 2968 2969 adapter->rss_conf = kmalloc(sizeof(struct UPT1_RSSConf), GFP_KERNEL); 2970 if (adapter->rss_conf == NULL) { 2971 printk(KERN_ERR "Failed to allocate memory for %s\n", 2972 pci_name(pdev)); 2973 err = -ENOMEM; 2974 goto err_alloc_rss; 2975 } 2976#endif /* VMXNET3_RSS */ 2977 2978 err = vmxnet3_alloc_pci_resources(adapter, &dma64); 2979 if (err < 0) 2980 goto err_alloc_pci; 2981 2982 ver = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_VRRS); 2983 if (ver & 1) { 2984 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_VRRS, 1); 2985 } else { 2986 printk(KERN_ERR "Incompatible h/w version (0x%x) for adapter" 2987 " %s\n", ver, pci_name(pdev)); 2988 err = -EBUSY; 2989 goto err_ver; 2990 } 2991 2992 ver = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_UVRS); 2993 if (ver & 1) { 2994 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_UVRS, 1); 2995 } else { 2996 printk(KERN_ERR "Incompatible upt version (0x%x) for " 2997 "adapter %s\n", ver, pci_name(pdev)); 2998 err = -EBUSY; 2999 goto err_ver; 3000 } 3001 3002 SET_NETDEV_DEV(netdev, &pdev->dev); 3003 vmxnet3_declare_features(adapter, dma64); 3004 3005 adapter->dev_number = atomic_read(&devices_found); 3006 3007 adapter->share_intr = irq_share_mode; 3008 if (adapter->share_intr == VMXNET3_INTR_BUDDYSHARE && 3009 adapter->num_tx_queues != adapter->num_rx_queues) 3010 adapter->share_intr = VMXNET3_INTR_DONTSHARE; 3011 3012 vmxnet3_alloc_intr_resources(adapter); 3013 3014#ifdef VMXNET3_RSS 3015 if (adapter->num_rx_queues > 1 && 3016 adapter->intr.type == VMXNET3_IT_MSIX) { 3017 adapter->rss = true; 3018 printk(KERN_INFO "RSS is enabled.\n"); 3019 } else { 3020 adapter->rss = false; 3021 } 3022#endif 3023 3024 vmxnet3_read_mac_addr(adapter, mac); 3025 memcpy(netdev->dev_addr, mac, netdev->addr_len); 3026 3027 netdev->netdev_ops = &vmxnet3_netdev_ops; 3028 vmxnet3_set_ethtool_ops(netdev); 3029 netdev->watchdog_timeo = 5 * HZ; 3030 3031 INIT_WORK(&adapter->work, vmxnet3_reset_work); 3032 3033 if (adapter->intr.type == VMXNET3_IT_MSIX) { 3034 int i; 3035 for (i = 0; i < adapter->num_rx_queues; i++) { 3036 netif_napi_add(adapter->netdev, 3037 &adapter->rx_queue[i].napi, 3038 vmxnet3_poll_rx_only, 64); 3039 } 3040 } else { 3041 netif_napi_add(adapter->netdev, &adapter->rx_queue[0].napi, 3042 vmxnet3_poll, 64); 3043 } 3044 3045 netif_set_real_num_tx_queues(adapter->netdev, adapter->num_tx_queues); 3046 netif_set_real_num_rx_queues(adapter->netdev, adapter->num_rx_queues); 3047 3048 err = register_netdev(netdev); 3049 3050 if (err) { 3051 printk(KERN_ERR "Failed to register adapter %s\n", 3052 pci_name(pdev)); 3053 goto err_register; 3054 } 3055 3056 set_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state); 3057 vmxnet3_check_link(adapter, false); 3058 atomic_inc(&devices_found); 3059 return 0; 3060 3061err_register: 3062 vmxnet3_free_intr_resources(adapter); 3063err_ver: 3064 vmxnet3_free_pci_resources(adapter); 3065err_alloc_pci: 3066#ifdef VMXNET3_RSS 3067 kfree(adapter->rss_conf); 3068err_alloc_rss: 3069#endif 3070 kfree(adapter->pm_conf); 3071err_alloc_pm: 3072 pci_free_consistent(adapter->pdev, size, adapter->tqd_start, 3073 adapter->queue_desc_pa); 3074err_alloc_queue_desc: 3075 pci_free_consistent(adapter->pdev, sizeof(struct Vmxnet3_DriverShared), 3076 adapter->shared, adapter->shared_pa); 3077err_alloc_shared: 3078 pci_set_drvdata(pdev, NULL); 3079 free_netdev(netdev); 3080 return err; 3081} 3082 3083 3084static void __devexit 3085vmxnet3_remove_device(struct pci_dev *pdev) 3086{ 3087 struct net_device *netdev = pci_get_drvdata(pdev); 3088 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 3089 int size = 0; 3090 int num_rx_queues; 3091 3092#ifdef VMXNET3_RSS 3093 if (enable_mq) 3094 num_rx_queues = min(VMXNET3_DEVICE_MAX_RX_QUEUES, 3095 (int)num_online_cpus()); 3096 else 3097#endif 3098 num_rx_queues = 1; 3099 num_rx_queues = rounddown_pow_of_two(num_rx_queues); 3100 3101 cancel_work_sync(&adapter->work); 3102 3103 unregister_netdev(netdev); 3104 3105 vmxnet3_free_intr_resources(adapter); 3106 vmxnet3_free_pci_resources(adapter); 3107#ifdef VMXNET3_RSS 3108 kfree(adapter->rss_conf); 3109#endif 3110 kfree(adapter->pm_conf); 3111 3112 size = sizeof(struct Vmxnet3_TxQueueDesc) * adapter->num_tx_queues; 3113 size += sizeof(struct Vmxnet3_RxQueueDesc) * num_rx_queues; 3114 pci_free_consistent(adapter->pdev, size, adapter->tqd_start, 3115 adapter->queue_desc_pa); 3116 pci_free_consistent(adapter->pdev, sizeof(struct Vmxnet3_DriverShared), 3117 adapter->shared, adapter->shared_pa); 3118 free_netdev(netdev); 3119} 3120 3121 3122#ifdef CONFIG_PM 3123 3124static int 3125vmxnet3_suspend(struct device *device) 3126{ 3127 struct pci_dev *pdev = to_pci_dev(device); 3128 struct net_device *netdev = pci_get_drvdata(pdev); 3129 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 3130 struct Vmxnet3_PMConf *pmConf; 3131 struct ethhdr *ehdr; 3132 struct arphdr *ahdr; 3133 u8 *arpreq; 3134 struct in_device *in_dev; 3135 struct in_ifaddr *ifa; 3136 unsigned long flags; 3137 int i = 0; 3138 3139 if (!netif_running(netdev)) 3140 return 0; 3141 3142 for (i = 0; i < adapter->num_rx_queues; i++) 3143 napi_disable(&adapter->rx_queue[i].napi); 3144 3145 vmxnet3_disable_all_intrs(adapter); 3146 vmxnet3_free_irqs(adapter); 3147 vmxnet3_free_intr_resources(adapter); 3148 3149 netif_device_detach(netdev); 3150 netif_tx_stop_all_queues(netdev); 3151 3152 /* Create wake-up filters. */ 3153 pmConf = adapter->pm_conf; 3154 memset(pmConf, 0, sizeof(*pmConf)); 3155 3156 if (adapter->wol & WAKE_UCAST) { 3157 pmConf->filters[i].patternSize = ETH_ALEN; 3158 pmConf->filters[i].maskSize = 1; 3159 memcpy(pmConf->filters[i].pattern, netdev->dev_addr, ETH_ALEN); 3160 pmConf->filters[i].mask[0] = 0x3F; /* LSB ETH_ALEN bits */ 3161 3162 pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_FILTER; 3163 i++; 3164 } 3165 3166 if (adapter->wol & WAKE_ARP) { 3167 in_dev = in_dev_get(netdev); 3168 if (!in_dev) 3169 goto skip_arp; 3170 3171 ifa = (struct in_ifaddr *)in_dev->ifa_list; 3172 if (!ifa) 3173 goto skip_arp; 3174 3175 pmConf->filters[i].patternSize = ETH_HLEN + /* Ethernet header*/ 3176 sizeof(struct arphdr) + /* ARP header */ 3177 2 * ETH_ALEN + /* 2 Ethernet addresses*/ 3178 2 * sizeof(u32); /*2 IPv4 addresses */ 3179 pmConf->filters[i].maskSize = 3180 (pmConf->filters[i].patternSize - 1) / 8 + 1; 3181 3182 /* ETH_P_ARP in Ethernet header. */ 3183 ehdr = (struct ethhdr *)pmConf->filters[i].pattern; 3184 ehdr->h_proto = htons(ETH_P_ARP); 3185 3186 /* ARPOP_REQUEST in ARP header. */ 3187 ahdr = (struct arphdr *)&pmConf->filters[i].pattern[ETH_HLEN]; 3188 ahdr->ar_op = htons(ARPOP_REQUEST); 3189 arpreq = (u8 *)(ahdr + 1); 3190 3191 /* The Unicast IPv4 address in 'tip' field. */ 3192 arpreq += 2 * ETH_ALEN + sizeof(u32); 3193 *(u32 *)arpreq = ifa->ifa_address; 3194 3195 /* The mask for the relevant bits. */ 3196 pmConf->filters[i].mask[0] = 0x00; 3197 pmConf->filters[i].mask[1] = 0x30; /* ETH_P_ARP */ 3198 pmConf->filters[i].mask[2] = 0x30; /* ARPOP_REQUEST */ 3199 pmConf->filters[i].mask[3] = 0x00; 3200 pmConf->filters[i].mask[4] = 0xC0; /* IPv4 TIP */ 3201 pmConf->filters[i].mask[5] = 0x03; /* IPv4 TIP */ 3202 in_dev_put(in_dev); 3203 3204 pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_FILTER; 3205 i++; 3206 } 3207 3208skip_arp: 3209 if (adapter->wol & WAKE_MAGIC) 3210 pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_MAGIC; 3211 3212 pmConf->numFilters = i; 3213 3214 adapter->shared->devRead.pmConfDesc.confVer = cpu_to_le32(1); 3215 adapter->shared->devRead.pmConfDesc.confLen = cpu_to_le32(sizeof( 3216 *pmConf)); 3217 adapter->shared->devRead.pmConfDesc.confPA = cpu_to_le64(virt_to_phys( 3218 pmConf)); 3219 3220 spin_lock_irqsave(&adapter->cmd_lock, flags); 3221 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 3222 VMXNET3_CMD_UPDATE_PMCFG); 3223 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 3224 3225 pci_save_state(pdev); 3226 pci_enable_wake(pdev, pci_choose_state(pdev, PMSG_SUSPEND), 3227 adapter->wol); 3228 pci_disable_device(pdev); 3229 pci_set_power_state(pdev, pci_choose_state(pdev, PMSG_SUSPEND)); 3230 3231 return 0; 3232} 3233 3234 3235static int 3236vmxnet3_resume(struct device *device) 3237{ 3238 int err, i = 0; 3239 unsigned long flags; 3240 struct pci_dev *pdev = to_pci_dev(device); 3241 struct net_device *netdev = pci_get_drvdata(pdev); 3242 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 3243 struct Vmxnet3_PMConf *pmConf; 3244 3245 if (!netif_running(netdev)) 3246 return 0; 3247 3248 /* Destroy wake-up filters. */ 3249 pmConf = adapter->pm_conf; 3250 memset(pmConf, 0, sizeof(*pmConf)); 3251 3252 adapter->shared->devRead.pmConfDesc.confVer = cpu_to_le32(1); 3253 adapter->shared->devRead.pmConfDesc.confLen = cpu_to_le32(sizeof( 3254 *pmConf)); 3255 adapter->shared->devRead.pmConfDesc.confPA = cpu_to_le64(virt_to_phys( 3256 pmConf)); 3257 3258 netif_device_attach(netdev); 3259 pci_set_power_state(pdev, PCI_D0); 3260 pci_restore_state(pdev); 3261 err = pci_enable_device_mem(pdev); 3262 if (err != 0) 3263 return err; 3264 3265 pci_enable_wake(pdev, PCI_D0, 0); 3266 3267 spin_lock_irqsave(&adapter->cmd_lock, flags); 3268 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 3269 VMXNET3_CMD_UPDATE_PMCFG); 3270 spin_unlock_irqrestore(&adapter->cmd_lock, flags); 3271 vmxnet3_alloc_intr_resources(adapter); 3272 vmxnet3_request_irqs(adapter); 3273 for (i = 0; i < adapter->num_rx_queues; i++) 3274 napi_enable(&adapter->rx_queue[i].napi); 3275 vmxnet3_enable_all_intrs(adapter); 3276 3277 return 0; 3278} 3279 3280static const struct dev_pm_ops vmxnet3_pm_ops = { 3281 .suspend = vmxnet3_suspend, 3282 .resume = vmxnet3_resume, 3283}; 3284#endif 3285 3286static struct pci_driver vmxnet3_driver = { 3287 .name = vmxnet3_driver_name, 3288 .id_table = vmxnet3_pciid_table, 3289 .probe = vmxnet3_probe_device, 3290 .remove = __devexit_p(vmxnet3_remove_device), 3291#ifdef CONFIG_PM 3292 .driver.pm = &vmxnet3_pm_ops, 3293#endif 3294}; 3295 3296 3297static int __init 3298vmxnet3_init_module(void) 3299{ 3300 printk(KERN_INFO "%s - version %s\n", VMXNET3_DRIVER_DESC, 3301 VMXNET3_DRIVER_VERSION_REPORT); 3302 return pci_register_driver(&vmxnet3_driver); 3303} 3304 3305module_init(vmxnet3_init_module); 3306 3307 3308static void 3309vmxnet3_exit_module(void) 3310{ 3311 pci_unregister_driver(&vmxnet3_driver); 3312} 3313 3314module_exit(vmxnet3_exit_module); 3315 3316MODULE_AUTHOR("VMware, Inc."); 3317MODULE_DESCRIPTION(VMXNET3_DRIVER_DESC); 3318MODULE_LICENSE("GPL v2"); 3319MODULE_VERSION(VMXNET3_DRIVER_VERSION_STRING); 3320