vmxnet3_drv.c revision 22bedad3ce112d5ca1eaf043d4990fa2ed698c87
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 48/* 49 * Enable/Disable the given intr 50 */ 51static void 52vmxnet3_enable_intr(struct vmxnet3_adapter *adapter, unsigned intr_idx) 53{ 54 VMXNET3_WRITE_BAR0_REG(adapter, VMXNET3_REG_IMR + intr_idx * 8, 0); 55} 56 57 58static void 59vmxnet3_disable_intr(struct vmxnet3_adapter *adapter, unsigned intr_idx) 60{ 61 VMXNET3_WRITE_BAR0_REG(adapter, VMXNET3_REG_IMR + intr_idx * 8, 1); 62} 63 64 65/* 66 * Enable/Disable all intrs used by the device 67 */ 68static void 69vmxnet3_enable_all_intrs(struct vmxnet3_adapter *adapter) 70{ 71 int i; 72 73 for (i = 0; i < adapter->intr.num_intrs; i++) 74 vmxnet3_enable_intr(adapter, i); 75} 76 77 78static void 79vmxnet3_disable_all_intrs(struct vmxnet3_adapter *adapter) 80{ 81 int i; 82 83 for (i = 0; i < adapter->intr.num_intrs; i++) 84 vmxnet3_disable_intr(adapter, i); 85} 86 87 88static void 89vmxnet3_ack_events(struct vmxnet3_adapter *adapter, u32 events) 90{ 91 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_ECR, events); 92} 93 94 95static bool 96vmxnet3_tq_stopped(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter) 97{ 98 return netif_queue_stopped(adapter->netdev); 99} 100 101 102static void 103vmxnet3_tq_start(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter) 104{ 105 tq->stopped = false; 106 netif_start_queue(adapter->netdev); 107} 108 109 110static void 111vmxnet3_tq_wake(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter) 112{ 113 tq->stopped = false; 114 netif_wake_queue(adapter->netdev); 115} 116 117 118static void 119vmxnet3_tq_stop(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter) 120{ 121 tq->stopped = true; 122 tq->num_stop++; 123 netif_stop_queue(adapter->netdev); 124} 125 126 127/* 128 * Check the link state. This may start or stop the tx queue. 129 */ 130static void 131vmxnet3_check_link(struct vmxnet3_adapter *adapter) 132{ 133 u32 ret; 134 135 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_GET_LINK); 136 ret = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD); 137 adapter->link_speed = ret >> 16; 138 if (ret & 1) { /* Link is up. */ 139 printk(KERN_INFO "%s: NIC Link is Up %d Mbps\n", 140 adapter->netdev->name, adapter->link_speed); 141 if (!netif_carrier_ok(adapter->netdev)) 142 netif_carrier_on(adapter->netdev); 143 144 vmxnet3_tq_start(&adapter->tx_queue, adapter); 145 } else { 146 printk(KERN_INFO "%s: NIC Link is Down\n", 147 adapter->netdev->name); 148 if (netif_carrier_ok(adapter->netdev)) 149 netif_carrier_off(adapter->netdev); 150 151 vmxnet3_tq_stop(&adapter->tx_queue, adapter); 152 } 153} 154 155static void 156vmxnet3_process_events(struct vmxnet3_adapter *adapter) 157{ 158 u32 events = le32_to_cpu(adapter->shared->ecr); 159 if (!events) 160 return; 161 162 vmxnet3_ack_events(adapter, events); 163 164 /* Check if link state has changed */ 165 if (events & VMXNET3_ECR_LINK) 166 vmxnet3_check_link(adapter); 167 168 /* Check if there is an error on xmit/recv queues */ 169 if (events & (VMXNET3_ECR_TQERR | VMXNET3_ECR_RQERR)) { 170 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 171 VMXNET3_CMD_GET_QUEUE_STATUS); 172 173 if (adapter->tqd_start->status.stopped) { 174 printk(KERN_ERR "%s: tq error 0x%x\n", 175 adapter->netdev->name, 176 le32_to_cpu(adapter->tqd_start->status.error)); 177 } 178 if (adapter->rqd_start->status.stopped) { 179 printk(KERN_ERR "%s: rq error 0x%x\n", 180 adapter->netdev->name, 181 adapter->rqd_start->status.error); 182 } 183 184 schedule_work(&adapter->work); 185 } 186} 187 188#ifdef __BIG_ENDIAN_BITFIELD 189/* 190 * The device expects the bitfields in shared structures to be written in 191 * little endian. When CPU is big endian, the following routines are used to 192 * correctly read and write into ABI. 193 * The general technique used here is : double word bitfields are defined in 194 * opposite order for big endian architecture. Then before reading them in 195 * driver the complete double word is translated using le32_to_cpu. Similarly 196 * After the driver writes into bitfields, cpu_to_le32 is used to translate the 197 * double words into required format. 198 * In order to avoid touching bits in shared structure more than once, temporary 199 * descriptors are used. These are passed as srcDesc to following functions. 200 */ 201static void vmxnet3_RxDescToCPU(const struct Vmxnet3_RxDesc *srcDesc, 202 struct Vmxnet3_RxDesc *dstDesc) 203{ 204 u32 *src = (u32 *)srcDesc + 2; 205 u32 *dst = (u32 *)dstDesc + 2; 206 dstDesc->addr = le64_to_cpu(srcDesc->addr); 207 *dst = le32_to_cpu(*src); 208 dstDesc->ext1 = le32_to_cpu(srcDesc->ext1); 209} 210 211static void vmxnet3_TxDescToLe(const struct Vmxnet3_TxDesc *srcDesc, 212 struct Vmxnet3_TxDesc *dstDesc) 213{ 214 int i; 215 u32 *src = (u32 *)(srcDesc + 1); 216 u32 *dst = (u32 *)(dstDesc + 1); 217 218 /* Working backwards so that the gen bit is set at the end. */ 219 for (i = 2; i > 0; i--) { 220 src--; 221 dst--; 222 *dst = cpu_to_le32(*src); 223 } 224} 225 226 227static void vmxnet3_RxCompToCPU(const struct Vmxnet3_RxCompDesc *srcDesc, 228 struct Vmxnet3_RxCompDesc *dstDesc) 229{ 230 int i = 0; 231 u32 *src = (u32 *)srcDesc; 232 u32 *dst = (u32 *)dstDesc; 233 for (i = 0; i < sizeof(struct Vmxnet3_RxCompDesc) / sizeof(u32); i++) { 234 *dst = le32_to_cpu(*src); 235 src++; 236 dst++; 237 } 238} 239 240 241/* Used to read bitfield values from double words. */ 242static u32 get_bitfield32(const __le32 *bitfield, u32 pos, u32 size) 243{ 244 u32 temp = le32_to_cpu(*bitfield); 245 u32 mask = ((1 << size) - 1) << pos; 246 temp &= mask; 247 temp >>= pos; 248 return temp; 249} 250 251 252 253#endif /* __BIG_ENDIAN_BITFIELD */ 254 255#ifdef __BIG_ENDIAN_BITFIELD 256 257# define VMXNET3_TXDESC_GET_GEN(txdesc) get_bitfield32(((const __le32 *) \ 258 txdesc) + VMXNET3_TXD_GEN_DWORD_SHIFT, \ 259 VMXNET3_TXD_GEN_SHIFT, VMXNET3_TXD_GEN_SIZE) 260# define VMXNET3_TXDESC_GET_EOP(txdesc) get_bitfield32(((const __le32 *) \ 261 txdesc) + VMXNET3_TXD_EOP_DWORD_SHIFT, \ 262 VMXNET3_TXD_EOP_SHIFT, VMXNET3_TXD_EOP_SIZE) 263# define VMXNET3_TCD_GET_GEN(tcd) get_bitfield32(((const __le32 *)tcd) + \ 264 VMXNET3_TCD_GEN_DWORD_SHIFT, VMXNET3_TCD_GEN_SHIFT, \ 265 VMXNET3_TCD_GEN_SIZE) 266# define VMXNET3_TCD_GET_TXIDX(tcd) get_bitfield32((const __le32 *)tcd, \ 267 VMXNET3_TCD_TXIDX_SHIFT, VMXNET3_TCD_TXIDX_SIZE) 268# define vmxnet3_getRxComp(dstrcd, rcd, tmp) do { \ 269 (dstrcd) = (tmp); \ 270 vmxnet3_RxCompToCPU((rcd), (tmp)); \ 271 } while (0) 272# define vmxnet3_getRxDesc(dstrxd, rxd, tmp) do { \ 273 (dstrxd) = (tmp); \ 274 vmxnet3_RxDescToCPU((rxd), (tmp)); \ 275 } while (0) 276 277#else 278 279# define VMXNET3_TXDESC_GET_GEN(txdesc) ((txdesc)->gen) 280# define VMXNET3_TXDESC_GET_EOP(txdesc) ((txdesc)->eop) 281# define VMXNET3_TCD_GET_GEN(tcd) ((tcd)->gen) 282# define VMXNET3_TCD_GET_TXIDX(tcd) ((tcd)->txdIdx) 283# define vmxnet3_getRxComp(dstrcd, rcd, tmp) (dstrcd) = (rcd) 284# define vmxnet3_getRxDesc(dstrxd, rxd, tmp) (dstrxd) = (rxd) 285 286#endif /* __BIG_ENDIAN_BITFIELD */ 287 288 289static void 290vmxnet3_unmap_tx_buf(struct vmxnet3_tx_buf_info *tbi, 291 struct pci_dev *pdev) 292{ 293 if (tbi->map_type == VMXNET3_MAP_SINGLE) 294 pci_unmap_single(pdev, tbi->dma_addr, tbi->len, 295 PCI_DMA_TODEVICE); 296 else if (tbi->map_type == VMXNET3_MAP_PAGE) 297 pci_unmap_page(pdev, tbi->dma_addr, tbi->len, 298 PCI_DMA_TODEVICE); 299 else 300 BUG_ON(tbi->map_type != VMXNET3_MAP_NONE); 301 302 tbi->map_type = VMXNET3_MAP_NONE; /* to help debugging */ 303} 304 305 306static int 307vmxnet3_unmap_pkt(u32 eop_idx, struct vmxnet3_tx_queue *tq, 308 struct pci_dev *pdev, struct vmxnet3_adapter *adapter) 309{ 310 struct sk_buff *skb; 311 int entries = 0; 312 313 /* no out of order completion */ 314 BUG_ON(tq->buf_info[eop_idx].sop_idx != tq->tx_ring.next2comp); 315 BUG_ON(VMXNET3_TXDESC_GET_EOP(&(tq->tx_ring.base[eop_idx].txd)) != 1); 316 317 skb = tq->buf_info[eop_idx].skb; 318 BUG_ON(skb == NULL); 319 tq->buf_info[eop_idx].skb = NULL; 320 321 VMXNET3_INC_RING_IDX_ONLY(eop_idx, tq->tx_ring.size); 322 323 while (tq->tx_ring.next2comp != eop_idx) { 324 vmxnet3_unmap_tx_buf(tq->buf_info + tq->tx_ring.next2comp, 325 pdev); 326 327 /* update next2comp w/o tx_lock. Since we are marking more, 328 * instead of less, tx ring entries avail, the worst case is 329 * that the tx routine incorrectly re-queues a pkt due to 330 * insufficient tx ring entries. 331 */ 332 vmxnet3_cmd_ring_adv_next2comp(&tq->tx_ring); 333 entries++; 334 } 335 336 dev_kfree_skb_any(skb); 337 return entries; 338} 339 340 341static int 342vmxnet3_tq_tx_complete(struct vmxnet3_tx_queue *tq, 343 struct vmxnet3_adapter *adapter) 344{ 345 int completed = 0; 346 union Vmxnet3_GenericDesc *gdesc; 347 348 gdesc = tq->comp_ring.base + tq->comp_ring.next2proc; 349 while (VMXNET3_TCD_GET_GEN(&gdesc->tcd) == tq->comp_ring.gen) { 350 completed += vmxnet3_unmap_pkt(VMXNET3_TCD_GET_TXIDX( 351 &gdesc->tcd), tq, adapter->pdev, 352 adapter); 353 354 vmxnet3_comp_ring_adv_next2proc(&tq->comp_ring); 355 gdesc = tq->comp_ring.base + tq->comp_ring.next2proc; 356 } 357 358 if (completed) { 359 spin_lock(&tq->tx_lock); 360 if (unlikely(vmxnet3_tq_stopped(tq, adapter) && 361 vmxnet3_cmd_ring_desc_avail(&tq->tx_ring) > 362 VMXNET3_WAKE_QUEUE_THRESHOLD(tq) && 363 netif_carrier_ok(adapter->netdev))) { 364 vmxnet3_tq_wake(tq, adapter); 365 } 366 spin_unlock(&tq->tx_lock); 367 } 368 return completed; 369} 370 371 372static void 373vmxnet3_tq_cleanup(struct vmxnet3_tx_queue *tq, 374 struct vmxnet3_adapter *adapter) 375{ 376 int i; 377 378 while (tq->tx_ring.next2comp != tq->tx_ring.next2fill) { 379 struct vmxnet3_tx_buf_info *tbi; 380 union Vmxnet3_GenericDesc *gdesc; 381 382 tbi = tq->buf_info + tq->tx_ring.next2comp; 383 gdesc = tq->tx_ring.base + tq->tx_ring.next2comp; 384 385 vmxnet3_unmap_tx_buf(tbi, adapter->pdev); 386 if (tbi->skb) { 387 dev_kfree_skb_any(tbi->skb); 388 tbi->skb = NULL; 389 } 390 vmxnet3_cmd_ring_adv_next2comp(&tq->tx_ring); 391 } 392 393 /* sanity check, verify all buffers are indeed unmapped and freed */ 394 for (i = 0; i < tq->tx_ring.size; i++) { 395 BUG_ON(tq->buf_info[i].skb != NULL || 396 tq->buf_info[i].map_type != VMXNET3_MAP_NONE); 397 } 398 399 tq->tx_ring.gen = VMXNET3_INIT_GEN; 400 tq->tx_ring.next2fill = tq->tx_ring.next2comp = 0; 401 402 tq->comp_ring.gen = VMXNET3_INIT_GEN; 403 tq->comp_ring.next2proc = 0; 404} 405 406 407void 408vmxnet3_tq_destroy(struct vmxnet3_tx_queue *tq, 409 struct vmxnet3_adapter *adapter) 410{ 411 if (tq->tx_ring.base) { 412 pci_free_consistent(adapter->pdev, tq->tx_ring.size * 413 sizeof(struct Vmxnet3_TxDesc), 414 tq->tx_ring.base, tq->tx_ring.basePA); 415 tq->tx_ring.base = NULL; 416 } 417 if (tq->data_ring.base) { 418 pci_free_consistent(adapter->pdev, tq->data_ring.size * 419 sizeof(struct Vmxnet3_TxDataDesc), 420 tq->data_ring.base, tq->data_ring.basePA); 421 tq->data_ring.base = NULL; 422 } 423 if (tq->comp_ring.base) { 424 pci_free_consistent(adapter->pdev, tq->comp_ring.size * 425 sizeof(struct Vmxnet3_TxCompDesc), 426 tq->comp_ring.base, tq->comp_ring.basePA); 427 tq->comp_ring.base = NULL; 428 } 429 kfree(tq->buf_info); 430 tq->buf_info = NULL; 431} 432 433 434static void 435vmxnet3_tq_init(struct vmxnet3_tx_queue *tq, 436 struct vmxnet3_adapter *adapter) 437{ 438 int i; 439 440 /* reset the tx ring contents to 0 and reset the tx ring states */ 441 memset(tq->tx_ring.base, 0, tq->tx_ring.size * 442 sizeof(struct Vmxnet3_TxDesc)); 443 tq->tx_ring.next2fill = tq->tx_ring.next2comp = 0; 444 tq->tx_ring.gen = VMXNET3_INIT_GEN; 445 446 memset(tq->data_ring.base, 0, tq->data_ring.size * 447 sizeof(struct Vmxnet3_TxDataDesc)); 448 449 /* reset the tx comp ring contents to 0 and reset comp ring states */ 450 memset(tq->comp_ring.base, 0, tq->comp_ring.size * 451 sizeof(struct Vmxnet3_TxCompDesc)); 452 tq->comp_ring.next2proc = 0; 453 tq->comp_ring.gen = VMXNET3_INIT_GEN; 454 455 /* reset the bookkeeping data */ 456 memset(tq->buf_info, 0, sizeof(tq->buf_info[0]) * tq->tx_ring.size); 457 for (i = 0; i < tq->tx_ring.size; i++) 458 tq->buf_info[i].map_type = VMXNET3_MAP_NONE; 459 460 /* stats are not reset */ 461} 462 463 464static int 465vmxnet3_tq_create(struct vmxnet3_tx_queue *tq, 466 struct vmxnet3_adapter *adapter) 467{ 468 BUG_ON(tq->tx_ring.base || tq->data_ring.base || 469 tq->comp_ring.base || tq->buf_info); 470 471 tq->tx_ring.base = pci_alloc_consistent(adapter->pdev, tq->tx_ring.size 472 * sizeof(struct Vmxnet3_TxDesc), 473 &tq->tx_ring.basePA); 474 if (!tq->tx_ring.base) { 475 printk(KERN_ERR "%s: failed to allocate tx ring\n", 476 adapter->netdev->name); 477 goto err; 478 } 479 480 tq->data_ring.base = pci_alloc_consistent(adapter->pdev, 481 tq->data_ring.size * 482 sizeof(struct Vmxnet3_TxDataDesc), 483 &tq->data_ring.basePA); 484 if (!tq->data_ring.base) { 485 printk(KERN_ERR "%s: failed to allocate data ring\n", 486 adapter->netdev->name); 487 goto err; 488 } 489 490 tq->comp_ring.base = pci_alloc_consistent(adapter->pdev, 491 tq->comp_ring.size * 492 sizeof(struct Vmxnet3_TxCompDesc), 493 &tq->comp_ring.basePA); 494 if (!tq->comp_ring.base) { 495 printk(KERN_ERR "%s: failed to allocate tx comp ring\n", 496 adapter->netdev->name); 497 goto err; 498 } 499 500 tq->buf_info = kcalloc(tq->tx_ring.size, sizeof(tq->buf_info[0]), 501 GFP_KERNEL); 502 if (!tq->buf_info) { 503 printk(KERN_ERR "%s: failed to allocate tx bufinfo\n", 504 adapter->netdev->name); 505 goto err; 506 } 507 508 return 0; 509 510err: 511 vmxnet3_tq_destroy(tq, adapter); 512 return -ENOMEM; 513} 514 515 516/* 517 * starting from ring->next2fill, allocate rx buffers for the given ring 518 * of the rx queue and update the rx desc. stop after @num_to_alloc buffers 519 * are allocated or allocation fails 520 */ 521 522static int 523vmxnet3_rq_alloc_rx_buf(struct vmxnet3_rx_queue *rq, u32 ring_idx, 524 int num_to_alloc, struct vmxnet3_adapter *adapter) 525{ 526 int num_allocated = 0; 527 struct vmxnet3_rx_buf_info *rbi_base = rq->buf_info[ring_idx]; 528 struct vmxnet3_cmd_ring *ring = &rq->rx_ring[ring_idx]; 529 u32 val; 530 531 while (num_allocated < num_to_alloc) { 532 struct vmxnet3_rx_buf_info *rbi; 533 union Vmxnet3_GenericDesc *gd; 534 535 rbi = rbi_base + ring->next2fill; 536 gd = ring->base + ring->next2fill; 537 538 if (rbi->buf_type == VMXNET3_RX_BUF_SKB) { 539 if (rbi->skb == NULL) { 540 rbi->skb = dev_alloc_skb(rbi->len + 541 NET_IP_ALIGN); 542 if (unlikely(rbi->skb == NULL)) { 543 rq->stats.rx_buf_alloc_failure++; 544 break; 545 } 546 rbi->skb->dev = adapter->netdev; 547 548 skb_reserve(rbi->skb, NET_IP_ALIGN); 549 rbi->dma_addr = pci_map_single(adapter->pdev, 550 rbi->skb->data, rbi->len, 551 PCI_DMA_FROMDEVICE); 552 } else { 553 /* rx buffer skipped by the device */ 554 } 555 val = VMXNET3_RXD_BTYPE_HEAD << VMXNET3_RXD_BTYPE_SHIFT; 556 } else { 557 BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_PAGE || 558 rbi->len != PAGE_SIZE); 559 560 if (rbi->page == NULL) { 561 rbi->page = alloc_page(GFP_ATOMIC); 562 if (unlikely(rbi->page == NULL)) { 563 rq->stats.rx_buf_alloc_failure++; 564 break; 565 } 566 rbi->dma_addr = pci_map_page(adapter->pdev, 567 rbi->page, 0, PAGE_SIZE, 568 PCI_DMA_FROMDEVICE); 569 } else { 570 /* rx buffers skipped by the device */ 571 } 572 val = VMXNET3_RXD_BTYPE_BODY << VMXNET3_RXD_BTYPE_SHIFT; 573 } 574 575 BUG_ON(rbi->dma_addr == 0); 576 gd->rxd.addr = cpu_to_le64(rbi->dma_addr); 577 gd->dword[2] = cpu_to_le32((ring->gen << VMXNET3_RXD_GEN_SHIFT) 578 | val | rbi->len); 579 580 num_allocated++; 581 vmxnet3_cmd_ring_adv_next2fill(ring); 582 } 583 rq->uncommitted[ring_idx] += num_allocated; 584 585 dev_dbg(&adapter->netdev->dev, 586 "alloc_rx_buf: %d allocated, next2fill %u, next2comp " 587 "%u, uncommited %u\n", num_allocated, ring->next2fill, 588 ring->next2comp, rq->uncommitted[ring_idx]); 589 590 /* so that the device can distinguish a full ring and an empty ring */ 591 BUG_ON(num_allocated != 0 && ring->next2fill == ring->next2comp); 592 593 return num_allocated; 594} 595 596 597static void 598vmxnet3_append_frag(struct sk_buff *skb, struct Vmxnet3_RxCompDesc *rcd, 599 struct vmxnet3_rx_buf_info *rbi) 600{ 601 struct skb_frag_struct *frag = skb_shinfo(skb)->frags + 602 skb_shinfo(skb)->nr_frags; 603 604 BUG_ON(skb_shinfo(skb)->nr_frags >= MAX_SKB_FRAGS); 605 606 frag->page = rbi->page; 607 frag->page_offset = 0; 608 frag->size = rcd->len; 609 skb->data_len += frag->size; 610 skb_shinfo(skb)->nr_frags++; 611} 612 613 614static void 615vmxnet3_map_pkt(struct sk_buff *skb, struct vmxnet3_tx_ctx *ctx, 616 struct vmxnet3_tx_queue *tq, struct pci_dev *pdev, 617 struct vmxnet3_adapter *adapter) 618{ 619 u32 dw2, len; 620 unsigned long buf_offset; 621 int i; 622 union Vmxnet3_GenericDesc *gdesc; 623 struct vmxnet3_tx_buf_info *tbi = NULL; 624 625 BUG_ON(ctx->copy_size > skb_headlen(skb)); 626 627 /* use the previous gen bit for the SOP desc */ 628 dw2 = (tq->tx_ring.gen ^ 0x1) << VMXNET3_TXD_GEN_SHIFT; 629 630 ctx->sop_txd = tq->tx_ring.base + tq->tx_ring.next2fill; 631 gdesc = ctx->sop_txd; /* both loops below can be skipped */ 632 633 /* no need to map the buffer if headers are copied */ 634 if (ctx->copy_size) { 635 ctx->sop_txd->txd.addr = cpu_to_le64(tq->data_ring.basePA + 636 tq->tx_ring.next2fill * 637 sizeof(struct Vmxnet3_TxDataDesc)); 638 ctx->sop_txd->dword[2] = cpu_to_le32(dw2 | ctx->copy_size); 639 ctx->sop_txd->dword[3] = 0; 640 641 tbi = tq->buf_info + tq->tx_ring.next2fill; 642 tbi->map_type = VMXNET3_MAP_NONE; 643 644 dev_dbg(&adapter->netdev->dev, 645 "txd[%u]: 0x%Lx 0x%x 0x%x\n", 646 tq->tx_ring.next2fill, 647 le64_to_cpu(ctx->sop_txd->txd.addr), 648 ctx->sop_txd->dword[2], ctx->sop_txd->dword[3]); 649 vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring); 650 651 /* use the right gen for non-SOP desc */ 652 dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT; 653 } 654 655 /* linear part can use multiple tx desc if it's big */ 656 len = skb_headlen(skb) - ctx->copy_size; 657 buf_offset = ctx->copy_size; 658 while (len) { 659 u32 buf_size; 660 661 buf_size = len > VMXNET3_MAX_TX_BUF_SIZE ? 662 VMXNET3_MAX_TX_BUF_SIZE : len; 663 664 tbi = tq->buf_info + tq->tx_ring.next2fill; 665 tbi->map_type = VMXNET3_MAP_SINGLE; 666 tbi->dma_addr = pci_map_single(adapter->pdev, 667 skb->data + buf_offset, buf_size, 668 PCI_DMA_TODEVICE); 669 670 tbi->len = buf_size; /* this automatically convert 2^14 to 0 */ 671 672 gdesc = tq->tx_ring.base + tq->tx_ring.next2fill; 673 BUG_ON(gdesc->txd.gen == tq->tx_ring.gen); 674 675 gdesc->txd.addr = cpu_to_le64(tbi->dma_addr); 676 gdesc->dword[2] = cpu_to_le32(dw2 | buf_size); 677 gdesc->dword[3] = 0; 678 679 dev_dbg(&adapter->netdev->dev, 680 "txd[%u]: 0x%Lx 0x%x 0x%x\n", 681 tq->tx_ring.next2fill, le64_to_cpu(gdesc->txd.addr), 682 le32_to_cpu(gdesc->dword[2]), gdesc->dword[3]); 683 vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring); 684 dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT; 685 686 len -= buf_size; 687 buf_offset += buf_size; 688 } 689 690 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 691 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i]; 692 693 tbi = tq->buf_info + tq->tx_ring.next2fill; 694 tbi->map_type = VMXNET3_MAP_PAGE; 695 tbi->dma_addr = pci_map_page(adapter->pdev, frag->page, 696 frag->page_offset, frag->size, 697 PCI_DMA_TODEVICE); 698 699 tbi->len = frag->size; 700 701 gdesc = tq->tx_ring.base + tq->tx_ring.next2fill; 702 BUG_ON(gdesc->txd.gen == tq->tx_ring.gen); 703 704 gdesc->txd.addr = cpu_to_le64(tbi->dma_addr); 705 gdesc->dword[2] = cpu_to_le32(dw2 | frag->size); 706 gdesc->dword[3] = 0; 707 708 dev_dbg(&adapter->netdev->dev, 709 "txd[%u]: 0x%llu %u %u\n", 710 tq->tx_ring.next2fill, le64_to_cpu(gdesc->txd.addr), 711 le32_to_cpu(gdesc->dword[2]), gdesc->dword[3]); 712 vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring); 713 dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT; 714 } 715 716 ctx->eop_txd = gdesc; 717 718 /* set the last buf_info for the pkt */ 719 tbi->skb = skb; 720 tbi->sop_idx = ctx->sop_txd - tq->tx_ring.base; 721} 722 723 724/* 725 * parse and copy relevant protocol headers: 726 * For a tso pkt, relevant headers are L2/3/4 including options 727 * For a pkt requesting csum offloading, they are L2/3 and may include L4 728 * if it's a TCP/UDP pkt 729 * 730 * Returns: 731 * -1: error happens during parsing 732 * 0: protocol headers parsed, but too big to be copied 733 * 1: protocol headers parsed and copied 734 * 735 * Other effects: 736 * 1. related *ctx fields are updated. 737 * 2. ctx->copy_size is # of bytes copied 738 * 3. the portion copied is guaranteed to be in the linear part 739 * 740 */ 741static int 742vmxnet3_parse_and_copy_hdr(struct sk_buff *skb, struct vmxnet3_tx_queue *tq, 743 struct vmxnet3_tx_ctx *ctx, 744 struct vmxnet3_adapter *adapter) 745{ 746 struct Vmxnet3_TxDataDesc *tdd; 747 748 if (ctx->mss) { 749 ctx->eth_ip_hdr_size = skb_transport_offset(skb); 750 ctx->l4_hdr_size = ((struct tcphdr *) 751 skb_transport_header(skb))->doff * 4; 752 ctx->copy_size = ctx->eth_ip_hdr_size + ctx->l4_hdr_size; 753 } else { 754 unsigned int pull_size; 755 756 if (skb->ip_summed == CHECKSUM_PARTIAL) { 757 ctx->eth_ip_hdr_size = skb_transport_offset(skb); 758 759 if (ctx->ipv4) { 760 struct iphdr *iph = (struct iphdr *) 761 skb_network_header(skb); 762 if (iph->protocol == IPPROTO_TCP) { 763 pull_size = ctx->eth_ip_hdr_size + 764 sizeof(struct tcphdr); 765 766 if (unlikely(!pskb_may_pull(skb, 767 pull_size))) { 768 goto err; 769 } 770 ctx->l4_hdr_size = ((struct tcphdr *) 771 skb_transport_header(skb))->doff * 4; 772 } else if (iph->protocol == IPPROTO_UDP) { 773 ctx->l4_hdr_size = 774 sizeof(struct udphdr); 775 } else { 776 ctx->l4_hdr_size = 0; 777 } 778 } else { 779 /* for simplicity, don't copy L4 headers */ 780 ctx->l4_hdr_size = 0; 781 } 782 ctx->copy_size = ctx->eth_ip_hdr_size + 783 ctx->l4_hdr_size; 784 } else { 785 ctx->eth_ip_hdr_size = 0; 786 ctx->l4_hdr_size = 0; 787 /* copy as much as allowed */ 788 ctx->copy_size = min((unsigned int)VMXNET3_HDR_COPY_SIZE 789 , skb_headlen(skb)); 790 } 791 792 /* make sure headers are accessible directly */ 793 if (unlikely(!pskb_may_pull(skb, ctx->copy_size))) 794 goto err; 795 } 796 797 if (unlikely(ctx->copy_size > VMXNET3_HDR_COPY_SIZE)) { 798 tq->stats.oversized_hdr++; 799 ctx->copy_size = 0; 800 return 0; 801 } 802 803 tdd = tq->data_ring.base + tq->tx_ring.next2fill; 804 805 memcpy(tdd->data, skb->data, ctx->copy_size); 806 dev_dbg(&adapter->netdev->dev, 807 "copy %u bytes to dataRing[%u]\n", 808 ctx->copy_size, tq->tx_ring.next2fill); 809 return 1; 810 811err: 812 return -1; 813} 814 815 816static void 817vmxnet3_prepare_tso(struct sk_buff *skb, 818 struct vmxnet3_tx_ctx *ctx) 819{ 820 struct tcphdr *tcph = (struct tcphdr *)skb_transport_header(skb); 821 if (ctx->ipv4) { 822 struct iphdr *iph = (struct iphdr *)skb_network_header(skb); 823 iph->check = 0; 824 tcph->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr, 0, 825 IPPROTO_TCP, 0); 826 } else { 827 struct ipv6hdr *iph = (struct ipv6hdr *)skb_network_header(skb); 828 tcph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, 0, 829 IPPROTO_TCP, 0); 830 } 831} 832 833 834/* 835 * Transmits a pkt thru a given tq 836 * Returns: 837 * NETDEV_TX_OK: descriptors are setup successfully 838 * NETDEV_TX_OK: error occured, the pkt is dropped 839 * NETDEV_TX_BUSY: tx ring is full, queue is stopped 840 * 841 * Side-effects: 842 * 1. tx ring may be changed 843 * 2. tq stats may be updated accordingly 844 * 3. shared->txNumDeferred may be updated 845 */ 846 847static int 848vmxnet3_tq_xmit(struct sk_buff *skb, struct vmxnet3_tx_queue *tq, 849 struct vmxnet3_adapter *adapter, struct net_device *netdev) 850{ 851 int ret; 852 u32 count; 853 unsigned long flags; 854 struct vmxnet3_tx_ctx ctx; 855 union Vmxnet3_GenericDesc *gdesc; 856#ifdef __BIG_ENDIAN_BITFIELD 857 /* Use temporary descriptor to avoid touching bits multiple times */ 858 union Vmxnet3_GenericDesc tempTxDesc; 859#endif 860 861 /* conservatively estimate # of descriptors to use */ 862 count = VMXNET3_TXD_NEEDED(skb_headlen(skb)) + 863 skb_shinfo(skb)->nr_frags + 1; 864 865 ctx.ipv4 = (skb->protocol == __constant_ntohs(ETH_P_IP)); 866 867 ctx.mss = skb_shinfo(skb)->gso_size; 868 if (ctx.mss) { 869 if (skb_header_cloned(skb)) { 870 if (unlikely(pskb_expand_head(skb, 0, 0, 871 GFP_ATOMIC) != 0)) { 872 tq->stats.drop_tso++; 873 goto drop_pkt; 874 } 875 tq->stats.copy_skb_header++; 876 } 877 vmxnet3_prepare_tso(skb, &ctx); 878 } else { 879 if (unlikely(count > VMXNET3_MAX_TXD_PER_PKT)) { 880 881 /* non-tso pkts must not use more than 882 * VMXNET3_MAX_TXD_PER_PKT entries 883 */ 884 if (skb_linearize(skb) != 0) { 885 tq->stats.drop_too_many_frags++; 886 goto drop_pkt; 887 } 888 tq->stats.linearized++; 889 890 /* recalculate the # of descriptors to use */ 891 count = VMXNET3_TXD_NEEDED(skb_headlen(skb)) + 1; 892 } 893 } 894 895 ret = vmxnet3_parse_and_copy_hdr(skb, tq, &ctx, adapter); 896 if (ret >= 0) { 897 BUG_ON(ret <= 0 && ctx.copy_size != 0); 898 /* hdrs parsed, check against other limits */ 899 if (ctx.mss) { 900 if (unlikely(ctx.eth_ip_hdr_size + ctx.l4_hdr_size > 901 VMXNET3_MAX_TX_BUF_SIZE)) { 902 goto hdr_too_big; 903 } 904 } else { 905 if (skb->ip_summed == CHECKSUM_PARTIAL) { 906 if (unlikely(ctx.eth_ip_hdr_size + 907 skb->csum_offset > 908 VMXNET3_MAX_CSUM_OFFSET)) { 909 goto hdr_too_big; 910 } 911 } 912 } 913 } else { 914 tq->stats.drop_hdr_inspect_err++; 915 goto drop_pkt; 916 } 917 918 spin_lock_irqsave(&tq->tx_lock, flags); 919 920 if (count > vmxnet3_cmd_ring_desc_avail(&tq->tx_ring)) { 921 tq->stats.tx_ring_full++; 922 dev_dbg(&adapter->netdev->dev, 923 "tx queue stopped on %s, next2comp %u" 924 " next2fill %u\n", adapter->netdev->name, 925 tq->tx_ring.next2comp, tq->tx_ring.next2fill); 926 927 vmxnet3_tq_stop(tq, adapter); 928 spin_unlock_irqrestore(&tq->tx_lock, flags); 929 return NETDEV_TX_BUSY; 930 } 931 932 /* fill tx descs related to addr & len */ 933 vmxnet3_map_pkt(skb, &ctx, tq, adapter->pdev, adapter); 934 935 /* setup the EOP desc */ 936 ctx.eop_txd->dword[3] = cpu_to_le32(VMXNET3_TXD_CQ | VMXNET3_TXD_EOP); 937 938 /* setup the SOP desc */ 939#ifdef __BIG_ENDIAN_BITFIELD 940 gdesc = &tempTxDesc; 941 gdesc->dword[2] = ctx.sop_txd->dword[2]; 942 gdesc->dword[3] = ctx.sop_txd->dword[3]; 943#else 944 gdesc = ctx.sop_txd; 945#endif 946 if (ctx.mss) { 947 gdesc->txd.hlen = ctx.eth_ip_hdr_size + ctx.l4_hdr_size; 948 gdesc->txd.om = VMXNET3_OM_TSO; 949 gdesc->txd.msscof = ctx.mss; 950 le32_add_cpu(&tq->shared->txNumDeferred, (skb->len - 951 gdesc->txd.hlen + ctx.mss - 1) / ctx.mss); 952 } else { 953 if (skb->ip_summed == CHECKSUM_PARTIAL) { 954 gdesc->txd.hlen = ctx.eth_ip_hdr_size; 955 gdesc->txd.om = VMXNET3_OM_CSUM; 956 gdesc->txd.msscof = ctx.eth_ip_hdr_size + 957 skb->csum_offset; 958 } else { 959 gdesc->txd.om = 0; 960 gdesc->txd.msscof = 0; 961 } 962 le32_add_cpu(&tq->shared->txNumDeferred, 1); 963 } 964 965 if (vlan_tx_tag_present(skb)) { 966 gdesc->txd.ti = 1; 967 gdesc->txd.tci = vlan_tx_tag_get(skb); 968 } 969 970 /* finally flips the GEN bit of the SOP desc. */ 971 gdesc->dword[2] = cpu_to_le32(le32_to_cpu(gdesc->dword[2]) ^ 972 VMXNET3_TXD_GEN); 973#ifdef __BIG_ENDIAN_BITFIELD 974 /* Finished updating in bitfields of Tx Desc, so write them in original 975 * place. 976 */ 977 vmxnet3_TxDescToLe((struct Vmxnet3_TxDesc *)gdesc, 978 (struct Vmxnet3_TxDesc *)ctx.sop_txd); 979 gdesc = ctx.sop_txd; 980#endif 981 dev_dbg(&adapter->netdev->dev, 982 "txd[%u]: SOP 0x%Lx 0x%x 0x%x\n", 983 (u32)((union Vmxnet3_GenericDesc *)ctx.sop_txd - 984 tq->tx_ring.base), le64_to_cpu(gdesc->txd.addr), 985 le32_to_cpu(gdesc->dword[2]), le32_to_cpu(gdesc->dword[3])); 986 987 spin_unlock_irqrestore(&tq->tx_lock, flags); 988 989 if (le32_to_cpu(tq->shared->txNumDeferred) >= 990 le32_to_cpu(tq->shared->txThreshold)) { 991 tq->shared->txNumDeferred = 0; 992 VMXNET3_WRITE_BAR0_REG(adapter, VMXNET3_REG_TXPROD, 993 tq->tx_ring.next2fill); 994 } 995 netdev->trans_start = jiffies; 996 997 return NETDEV_TX_OK; 998 999hdr_too_big: 1000 tq->stats.drop_oversized_hdr++; 1001drop_pkt: 1002 tq->stats.drop_total++; 1003 dev_kfree_skb(skb); 1004 return NETDEV_TX_OK; 1005} 1006 1007 1008static netdev_tx_t 1009vmxnet3_xmit_frame(struct sk_buff *skb, struct net_device *netdev) 1010{ 1011 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 1012 1013 return vmxnet3_tq_xmit(skb, &adapter->tx_queue, adapter, netdev); 1014} 1015 1016 1017static void 1018vmxnet3_rx_csum(struct vmxnet3_adapter *adapter, 1019 struct sk_buff *skb, 1020 union Vmxnet3_GenericDesc *gdesc) 1021{ 1022 if (!gdesc->rcd.cnc && adapter->rxcsum) { 1023 /* typical case: TCP/UDP over IP and both csums are correct */ 1024 if ((le32_to_cpu(gdesc->dword[3]) & VMXNET3_RCD_CSUM_OK) == 1025 VMXNET3_RCD_CSUM_OK) { 1026 skb->ip_summed = CHECKSUM_UNNECESSARY; 1027 BUG_ON(!(gdesc->rcd.tcp || gdesc->rcd.udp)); 1028 BUG_ON(!(gdesc->rcd.v4 || gdesc->rcd.v6)); 1029 BUG_ON(gdesc->rcd.frg); 1030 } else { 1031 if (gdesc->rcd.csum) { 1032 skb->csum = htons(gdesc->rcd.csum); 1033 skb->ip_summed = CHECKSUM_PARTIAL; 1034 } else { 1035 skb->ip_summed = CHECKSUM_NONE; 1036 } 1037 } 1038 } else { 1039 skb->ip_summed = CHECKSUM_NONE; 1040 } 1041} 1042 1043 1044static void 1045vmxnet3_rx_error(struct vmxnet3_rx_queue *rq, struct Vmxnet3_RxCompDesc *rcd, 1046 struct vmxnet3_rx_ctx *ctx, struct vmxnet3_adapter *adapter) 1047{ 1048 rq->stats.drop_err++; 1049 if (!rcd->fcs) 1050 rq->stats.drop_fcs++; 1051 1052 rq->stats.drop_total++; 1053 1054 /* 1055 * We do not unmap and chain the rx buffer to the skb. 1056 * We basically pretend this buffer is not used and will be recycled 1057 * by vmxnet3_rq_alloc_rx_buf() 1058 */ 1059 1060 /* 1061 * ctx->skb may be NULL if this is the first and the only one 1062 * desc for the pkt 1063 */ 1064 if (ctx->skb) 1065 dev_kfree_skb_irq(ctx->skb); 1066 1067 ctx->skb = NULL; 1068} 1069 1070 1071static int 1072vmxnet3_rq_rx_complete(struct vmxnet3_rx_queue *rq, 1073 struct vmxnet3_adapter *adapter, int quota) 1074{ 1075 static u32 rxprod_reg[2] = {VMXNET3_REG_RXPROD, VMXNET3_REG_RXPROD2}; 1076 u32 num_rxd = 0; 1077 struct Vmxnet3_RxCompDesc *rcd; 1078 struct vmxnet3_rx_ctx *ctx = &rq->rx_ctx; 1079#ifdef __BIG_ENDIAN_BITFIELD 1080 struct Vmxnet3_RxDesc rxCmdDesc; 1081 struct Vmxnet3_RxCompDesc rxComp; 1082#endif 1083 vmxnet3_getRxComp(rcd, &rq->comp_ring.base[rq->comp_ring.next2proc].rcd, 1084 &rxComp); 1085 while (rcd->gen == rq->comp_ring.gen) { 1086 struct vmxnet3_rx_buf_info *rbi; 1087 struct sk_buff *skb; 1088 int num_to_alloc; 1089 struct Vmxnet3_RxDesc *rxd; 1090 u32 idx, ring_idx; 1091 1092 if (num_rxd >= quota) { 1093 /* we may stop even before we see the EOP desc of 1094 * the current pkt 1095 */ 1096 break; 1097 } 1098 num_rxd++; 1099 1100 idx = rcd->rxdIdx; 1101 ring_idx = rcd->rqID == rq->qid ? 0 : 1; 1102 vmxnet3_getRxDesc(rxd, &rq->rx_ring[ring_idx].base[idx].rxd, 1103 &rxCmdDesc); 1104 rbi = rq->buf_info[ring_idx] + idx; 1105 1106 BUG_ON(rxd->addr != rbi->dma_addr || 1107 rxd->len != rbi->len); 1108 1109 if (unlikely(rcd->eop && rcd->err)) { 1110 vmxnet3_rx_error(rq, rcd, ctx, adapter); 1111 goto rcd_done; 1112 } 1113 1114 if (rcd->sop) { /* first buf of the pkt */ 1115 BUG_ON(rxd->btype != VMXNET3_RXD_BTYPE_HEAD || 1116 rcd->rqID != rq->qid); 1117 1118 BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_SKB); 1119 BUG_ON(ctx->skb != NULL || rbi->skb == NULL); 1120 1121 if (unlikely(rcd->len == 0)) { 1122 /* Pretend the rx buffer is skipped. */ 1123 BUG_ON(!(rcd->sop && rcd->eop)); 1124 dev_dbg(&adapter->netdev->dev, 1125 "rxRing[%u][%u] 0 length\n", 1126 ring_idx, idx); 1127 goto rcd_done; 1128 } 1129 1130 ctx->skb = rbi->skb; 1131 rbi->skb = NULL; 1132 1133 pci_unmap_single(adapter->pdev, rbi->dma_addr, rbi->len, 1134 PCI_DMA_FROMDEVICE); 1135 1136 skb_put(ctx->skb, rcd->len); 1137 } else { 1138 BUG_ON(ctx->skb == NULL); 1139 /* non SOP buffer must be type 1 in most cases */ 1140 if (rbi->buf_type == VMXNET3_RX_BUF_PAGE) { 1141 BUG_ON(rxd->btype != VMXNET3_RXD_BTYPE_BODY); 1142 1143 if (rcd->len) { 1144 pci_unmap_page(adapter->pdev, 1145 rbi->dma_addr, rbi->len, 1146 PCI_DMA_FROMDEVICE); 1147 1148 vmxnet3_append_frag(ctx->skb, rcd, rbi); 1149 rbi->page = NULL; 1150 } 1151 } else { 1152 /* 1153 * The only time a non-SOP buffer is type 0 is 1154 * when it's EOP and error flag is raised, which 1155 * has already been handled. 1156 */ 1157 BUG_ON(true); 1158 } 1159 } 1160 1161 skb = ctx->skb; 1162 if (rcd->eop) { 1163 skb->len += skb->data_len; 1164 skb->truesize += skb->data_len; 1165 1166 vmxnet3_rx_csum(adapter, skb, 1167 (union Vmxnet3_GenericDesc *)rcd); 1168 skb->protocol = eth_type_trans(skb, adapter->netdev); 1169 1170 if (unlikely(adapter->vlan_grp && rcd->ts)) { 1171 vlan_hwaccel_receive_skb(skb, 1172 adapter->vlan_grp, rcd->tci); 1173 } else { 1174 netif_receive_skb(skb); 1175 } 1176 1177 adapter->netdev->last_rx = jiffies; 1178 ctx->skb = NULL; 1179 } 1180 1181rcd_done: 1182 /* device may skip some rx descs */ 1183 rq->rx_ring[ring_idx].next2comp = idx; 1184 VMXNET3_INC_RING_IDX_ONLY(rq->rx_ring[ring_idx].next2comp, 1185 rq->rx_ring[ring_idx].size); 1186 1187 /* refill rx buffers frequently to avoid starving the h/w */ 1188 num_to_alloc = vmxnet3_cmd_ring_desc_avail(rq->rx_ring + 1189 ring_idx); 1190 if (unlikely(num_to_alloc > VMXNET3_RX_ALLOC_THRESHOLD(rq, 1191 ring_idx, adapter))) { 1192 vmxnet3_rq_alloc_rx_buf(rq, ring_idx, num_to_alloc, 1193 adapter); 1194 1195 /* if needed, update the register */ 1196 if (unlikely(rq->shared->updateRxProd)) { 1197 VMXNET3_WRITE_BAR0_REG(adapter, 1198 rxprod_reg[ring_idx] + rq->qid * 8, 1199 rq->rx_ring[ring_idx].next2fill); 1200 rq->uncommitted[ring_idx] = 0; 1201 } 1202 } 1203 1204 vmxnet3_comp_ring_adv_next2proc(&rq->comp_ring); 1205 vmxnet3_getRxComp(rcd, 1206 &rq->comp_ring.base[rq->comp_ring.next2proc].rcd, &rxComp); 1207 } 1208 1209 return num_rxd; 1210} 1211 1212 1213static void 1214vmxnet3_rq_cleanup(struct vmxnet3_rx_queue *rq, 1215 struct vmxnet3_adapter *adapter) 1216{ 1217 u32 i, ring_idx; 1218 struct Vmxnet3_RxDesc *rxd; 1219 1220 for (ring_idx = 0; ring_idx < 2; ring_idx++) { 1221 for (i = 0; i < rq->rx_ring[ring_idx].size; i++) { 1222#ifdef __BIG_ENDIAN_BITFIELD 1223 struct Vmxnet3_RxDesc rxDesc; 1224#endif 1225 vmxnet3_getRxDesc(rxd, 1226 &rq->rx_ring[ring_idx].base[i].rxd, &rxDesc); 1227 1228 if (rxd->btype == VMXNET3_RXD_BTYPE_HEAD && 1229 rq->buf_info[ring_idx][i].skb) { 1230 pci_unmap_single(adapter->pdev, rxd->addr, 1231 rxd->len, PCI_DMA_FROMDEVICE); 1232 dev_kfree_skb(rq->buf_info[ring_idx][i].skb); 1233 rq->buf_info[ring_idx][i].skb = NULL; 1234 } else if (rxd->btype == VMXNET3_RXD_BTYPE_BODY && 1235 rq->buf_info[ring_idx][i].page) { 1236 pci_unmap_page(adapter->pdev, rxd->addr, 1237 rxd->len, PCI_DMA_FROMDEVICE); 1238 put_page(rq->buf_info[ring_idx][i].page); 1239 rq->buf_info[ring_idx][i].page = NULL; 1240 } 1241 } 1242 1243 rq->rx_ring[ring_idx].gen = VMXNET3_INIT_GEN; 1244 rq->rx_ring[ring_idx].next2fill = 1245 rq->rx_ring[ring_idx].next2comp = 0; 1246 rq->uncommitted[ring_idx] = 0; 1247 } 1248 1249 rq->comp_ring.gen = VMXNET3_INIT_GEN; 1250 rq->comp_ring.next2proc = 0; 1251} 1252 1253 1254void vmxnet3_rq_destroy(struct vmxnet3_rx_queue *rq, 1255 struct vmxnet3_adapter *adapter) 1256{ 1257 int i; 1258 int j; 1259 1260 /* all rx buffers must have already been freed */ 1261 for (i = 0; i < 2; i++) { 1262 if (rq->buf_info[i]) { 1263 for (j = 0; j < rq->rx_ring[i].size; j++) 1264 BUG_ON(rq->buf_info[i][j].page != NULL); 1265 } 1266 } 1267 1268 1269 kfree(rq->buf_info[0]); 1270 1271 for (i = 0; i < 2; i++) { 1272 if (rq->rx_ring[i].base) { 1273 pci_free_consistent(adapter->pdev, rq->rx_ring[i].size 1274 * sizeof(struct Vmxnet3_RxDesc), 1275 rq->rx_ring[i].base, 1276 rq->rx_ring[i].basePA); 1277 rq->rx_ring[i].base = NULL; 1278 } 1279 rq->buf_info[i] = NULL; 1280 } 1281 1282 if (rq->comp_ring.base) { 1283 pci_free_consistent(adapter->pdev, rq->comp_ring.size * 1284 sizeof(struct Vmxnet3_RxCompDesc), 1285 rq->comp_ring.base, rq->comp_ring.basePA); 1286 rq->comp_ring.base = NULL; 1287 } 1288} 1289 1290 1291static int 1292vmxnet3_rq_init(struct vmxnet3_rx_queue *rq, 1293 struct vmxnet3_adapter *adapter) 1294{ 1295 int i; 1296 1297 /* initialize buf_info */ 1298 for (i = 0; i < rq->rx_ring[0].size; i++) { 1299 1300 /* 1st buf for a pkt is skbuff */ 1301 if (i % adapter->rx_buf_per_pkt == 0) { 1302 rq->buf_info[0][i].buf_type = VMXNET3_RX_BUF_SKB; 1303 rq->buf_info[0][i].len = adapter->skb_buf_size; 1304 } else { /* subsequent bufs for a pkt is frag */ 1305 rq->buf_info[0][i].buf_type = VMXNET3_RX_BUF_PAGE; 1306 rq->buf_info[0][i].len = PAGE_SIZE; 1307 } 1308 } 1309 for (i = 0; i < rq->rx_ring[1].size; i++) { 1310 rq->buf_info[1][i].buf_type = VMXNET3_RX_BUF_PAGE; 1311 rq->buf_info[1][i].len = PAGE_SIZE; 1312 } 1313 1314 /* reset internal state and allocate buffers for both rings */ 1315 for (i = 0; i < 2; i++) { 1316 rq->rx_ring[i].next2fill = rq->rx_ring[i].next2comp = 0; 1317 rq->uncommitted[i] = 0; 1318 1319 memset(rq->rx_ring[i].base, 0, rq->rx_ring[i].size * 1320 sizeof(struct Vmxnet3_RxDesc)); 1321 rq->rx_ring[i].gen = VMXNET3_INIT_GEN; 1322 } 1323 if (vmxnet3_rq_alloc_rx_buf(rq, 0, rq->rx_ring[0].size - 1, 1324 adapter) == 0) { 1325 /* at least has 1 rx buffer for the 1st ring */ 1326 return -ENOMEM; 1327 } 1328 vmxnet3_rq_alloc_rx_buf(rq, 1, rq->rx_ring[1].size - 1, adapter); 1329 1330 /* reset the comp ring */ 1331 rq->comp_ring.next2proc = 0; 1332 memset(rq->comp_ring.base, 0, rq->comp_ring.size * 1333 sizeof(struct Vmxnet3_RxCompDesc)); 1334 rq->comp_ring.gen = VMXNET3_INIT_GEN; 1335 1336 /* reset rxctx */ 1337 rq->rx_ctx.skb = NULL; 1338 1339 /* stats are not reset */ 1340 return 0; 1341} 1342 1343 1344static int 1345vmxnet3_rq_create(struct vmxnet3_rx_queue *rq, struct vmxnet3_adapter *adapter) 1346{ 1347 int i; 1348 size_t sz; 1349 struct vmxnet3_rx_buf_info *bi; 1350 1351 for (i = 0; i < 2; i++) { 1352 1353 sz = rq->rx_ring[i].size * sizeof(struct Vmxnet3_RxDesc); 1354 rq->rx_ring[i].base = pci_alloc_consistent(adapter->pdev, sz, 1355 &rq->rx_ring[i].basePA); 1356 if (!rq->rx_ring[i].base) { 1357 printk(KERN_ERR "%s: failed to allocate rx ring %d\n", 1358 adapter->netdev->name, i); 1359 goto err; 1360 } 1361 } 1362 1363 sz = rq->comp_ring.size * sizeof(struct Vmxnet3_RxCompDesc); 1364 rq->comp_ring.base = pci_alloc_consistent(adapter->pdev, sz, 1365 &rq->comp_ring.basePA); 1366 if (!rq->comp_ring.base) { 1367 printk(KERN_ERR "%s: failed to allocate rx comp ring\n", 1368 adapter->netdev->name); 1369 goto err; 1370 } 1371 1372 sz = sizeof(struct vmxnet3_rx_buf_info) * (rq->rx_ring[0].size + 1373 rq->rx_ring[1].size); 1374 bi = kmalloc(sz, GFP_KERNEL); 1375 if (!bi) { 1376 printk(KERN_ERR "%s: failed to allocate rx bufinfo\n", 1377 adapter->netdev->name); 1378 goto err; 1379 } 1380 memset(bi, 0, sz); 1381 rq->buf_info[0] = bi; 1382 rq->buf_info[1] = bi + rq->rx_ring[0].size; 1383 1384 return 0; 1385 1386err: 1387 vmxnet3_rq_destroy(rq, adapter); 1388 return -ENOMEM; 1389} 1390 1391 1392static int 1393vmxnet3_do_poll(struct vmxnet3_adapter *adapter, int budget) 1394{ 1395 if (unlikely(adapter->shared->ecr)) 1396 vmxnet3_process_events(adapter); 1397 1398 vmxnet3_tq_tx_complete(&adapter->tx_queue, adapter); 1399 return vmxnet3_rq_rx_complete(&adapter->rx_queue, adapter, budget); 1400} 1401 1402 1403static int 1404vmxnet3_poll(struct napi_struct *napi, int budget) 1405{ 1406 struct vmxnet3_adapter *adapter = container_of(napi, 1407 struct vmxnet3_adapter, napi); 1408 int rxd_done; 1409 1410 rxd_done = vmxnet3_do_poll(adapter, budget); 1411 1412 if (rxd_done < budget) { 1413 napi_complete(napi); 1414 vmxnet3_enable_intr(adapter, 0); 1415 } 1416 return rxd_done; 1417} 1418 1419 1420/* Interrupt handler for vmxnet3 */ 1421static irqreturn_t 1422vmxnet3_intr(int irq, void *dev_id) 1423{ 1424 struct net_device *dev = dev_id; 1425 struct vmxnet3_adapter *adapter = netdev_priv(dev); 1426 1427 if (unlikely(adapter->intr.type == VMXNET3_IT_INTX)) { 1428 u32 icr = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_ICR); 1429 if (unlikely(icr == 0)) 1430 /* not ours */ 1431 return IRQ_NONE; 1432 } 1433 1434 1435 /* disable intr if needed */ 1436 if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE) 1437 vmxnet3_disable_intr(adapter, 0); 1438 1439 napi_schedule(&adapter->napi); 1440 1441 return IRQ_HANDLED; 1442} 1443 1444#ifdef CONFIG_NET_POLL_CONTROLLER 1445 1446 1447/* netpoll callback. */ 1448static void 1449vmxnet3_netpoll(struct net_device *netdev) 1450{ 1451 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 1452 int irq; 1453 1454#ifdef CONFIG_PCI_MSI 1455 if (adapter->intr.type == VMXNET3_IT_MSIX) 1456 irq = adapter->intr.msix_entries[0].vector; 1457 else 1458#endif 1459 irq = adapter->pdev->irq; 1460 1461 disable_irq(irq); 1462 vmxnet3_intr(irq, netdev); 1463 enable_irq(irq); 1464} 1465#endif 1466 1467static int 1468vmxnet3_request_irqs(struct vmxnet3_adapter *adapter) 1469{ 1470 int err; 1471 1472#ifdef CONFIG_PCI_MSI 1473 if (adapter->intr.type == VMXNET3_IT_MSIX) { 1474 /* we only use 1 MSI-X vector */ 1475 err = request_irq(adapter->intr.msix_entries[0].vector, 1476 vmxnet3_intr, 0, adapter->netdev->name, 1477 adapter->netdev); 1478 } else if (adapter->intr.type == VMXNET3_IT_MSI) { 1479 err = request_irq(adapter->pdev->irq, vmxnet3_intr, 0, 1480 adapter->netdev->name, adapter->netdev); 1481 } else 1482#endif 1483 { 1484 err = request_irq(adapter->pdev->irq, vmxnet3_intr, 1485 IRQF_SHARED, adapter->netdev->name, 1486 adapter->netdev); 1487 } 1488 1489 if (err) 1490 printk(KERN_ERR "Failed to request irq %s (intr type:%d), error" 1491 ":%d\n", adapter->netdev->name, adapter->intr.type, err); 1492 1493 1494 if (!err) { 1495 int i; 1496 /* init our intr settings */ 1497 for (i = 0; i < adapter->intr.num_intrs; i++) 1498 adapter->intr.mod_levels[i] = UPT1_IML_ADAPTIVE; 1499 1500 /* next setup intr index for all intr sources */ 1501 adapter->tx_queue.comp_ring.intr_idx = 0; 1502 adapter->rx_queue.comp_ring.intr_idx = 0; 1503 adapter->intr.event_intr_idx = 0; 1504 1505 printk(KERN_INFO "%s: intr type %u, mode %u, %u vectors " 1506 "allocated\n", adapter->netdev->name, adapter->intr.type, 1507 adapter->intr.mask_mode, adapter->intr.num_intrs); 1508 } 1509 1510 return err; 1511} 1512 1513 1514static void 1515vmxnet3_free_irqs(struct vmxnet3_adapter *adapter) 1516{ 1517 BUG_ON(adapter->intr.type == VMXNET3_IT_AUTO || 1518 adapter->intr.num_intrs <= 0); 1519 1520 switch (adapter->intr.type) { 1521#ifdef CONFIG_PCI_MSI 1522 case VMXNET3_IT_MSIX: 1523 { 1524 int i; 1525 1526 for (i = 0; i < adapter->intr.num_intrs; i++) 1527 free_irq(adapter->intr.msix_entries[i].vector, 1528 adapter->netdev); 1529 break; 1530 } 1531#endif 1532 case VMXNET3_IT_MSI: 1533 free_irq(adapter->pdev->irq, adapter->netdev); 1534 break; 1535 case VMXNET3_IT_INTX: 1536 free_irq(adapter->pdev->irq, adapter->netdev); 1537 break; 1538 default: 1539 BUG_ON(true); 1540 } 1541} 1542 1543 1544inline void set_flag_le16(__le16 *data, u16 flag) 1545{ 1546 *data = cpu_to_le16(le16_to_cpu(*data) | flag); 1547} 1548 1549inline void set_flag_le64(__le64 *data, u64 flag) 1550{ 1551 *data = cpu_to_le64(le64_to_cpu(*data) | flag); 1552} 1553 1554inline void reset_flag_le64(__le64 *data, u64 flag) 1555{ 1556 *data = cpu_to_le64(le64_to_cpu(*data) & ~flag); 1557} 1558 1559 1560static void 1561vmxnet3_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp) 1562{ 1563 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 1564 struct Vmxnet3_DriverShared *shared = adapter->shared; 1565 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable; 1566 1567 if (grp) { 1568 /* add vlan rx stripping. */ 1569 if (adapter->netdev->features & NETIF_F_HW_VLAN_RX) { 1570 int i; 1571 struct Vmxnet3_DSDevRead *devRead = &shared->devRead; 1572 adapter->vlan_grp = grp; 1573 1574 /* update FEATURES to device */ 1575 set_flag_le64(&devRead->misc.uptFeatures, 1576 UPT1_F_RXVLAN); 1577 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 1578 VMXNET3_CMD_UPDATE_FEATURE); 1579 /* 1580 * Clear entire vfTable; then enable untagged pkts. 1581 * Note: setting one entry in vfTable to non-zero turns 1582 * on VLAN rx filtering. 1583 */ 1584 for (i = 0; i < VMXNET3_VFT_SIZE; i++) 1585 vfTable[i] = 0; 1586 1587 VMXNET3_SET_VFTABLE_ENTRY(vfTable, 0); 1588 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 1589 VMXNET3_CMD_UPDATE_VLAN_FILTERS); 1590 } else { 1591 printk(KERN_ERR "%s: vlan_rx_register when device has " 1592 "no NETIF_F_HW_VLAN_RX\n", netdev->name); 1593 } 1594 } else { 1595 /* remove vlan rx stripping. */ 1596 struct Vmxnet3_DSDevRead *devRead = &shared->devRead; 1597 adapter->vlan_grp = NULL; 1598 1599 if (le64_to_cpu(devRead->misc.uptFeatures) & UPT1_F_RXVLAN) { 1600 int i; 1601 1602 for (i = 0; i < VMXNET3_VFT_SIZE; i++) { 1603 /* clear entire vfTable; this also disables 1604 * VLAN rx filtering 1605 */ 1606 vfTable[i] = 0; 1607 } 1608 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 1609 VMXNET3_CMD_UPDATE_VLAN_FILTERS); 1610 1611 /* update FEATURES to device */ 1612 reset_flag_le64(&devRead->misc.uptFeatures, 1613 UPT1_F_RXVLAN); 1614 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 1615 VMXNET3_CMD_UPDATE_FEATURE); 1616 } 1617 } 1618} 1619 1620 1621static void 1622vmxnet3_restore_vlan(struct vmxnet3_adapter *adapter) 1623{ 1624 if (adapter->vlan_grp) { 1625 u16 vid; 1626 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable; 1627 bool activeVlan = false; 1628 1629 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) { 1630 if (vlan_group_get_device(adapter->vlan_grp, vid)) { 1631 VMXNET3_SET_VFTABLE_ENTRY(vfTable, vid); 1632 activeVlan = true; 1633 } 1634 } 1635 if (activeVlan) { 1636 /* continue to allow untagged pkts */ 1637 VMXNET3_SET_VFTABLE_ENTRY(vfTable, 0); 1638 } 1639 } 1640} 1641 1642 1643static void 1644vmxnet3_vlan_rx_add_vid(struct net_device *netdev, u16 vid) 1645{ 1646 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 1647 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable; 1648 1649 VMXNET3_SET_VFTABLE_ENTRY(vfTable, vid); 1650 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 1651 VMXNET3_CMD_UPDATE_VLAN_FILTERS); 1652} 1653 1654 1655static void 1656vmxnet3_vlan_rx_kill_vid(struct net_device *netdev, u16 vid) 1657{ 1658 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 1659 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable; 1660 1661 VMXNET3_CLEAR_VFTABLE_ENTRY(vfTable, vid); 1662 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 1663 VMXNET3_CMD_UPDATE_VLAN_FILTERS); 1664} 1665 1666 1667static u8 * 1668vmxnet3_copy_mc(struct net_device *netdev) 1669{ 1670 u8 *buf = NULL; 1671 u32 sz = netdev_mc_count(netdev) * ETH_ALEN; 1672 1673 /* struct Vmxnet3_RxFilterConf.mfTableLen is u16. */ 1674 if (sz <= 0xffff) { 1675 /* We may be called with BH disabled */ 1676 buf = kmalloc(sz, GFP_ATOMIC); 1677 if (buf) { 1678 struct netdev_hw_addr *ha; 1679 int i = 0; 1680 1681 netdev_for_each_mc_addr(ha, netdev) 1682 memcpy(buf + i++ * ETH_ALEN, ha->addr, 1683 ETH_ALEN); 1684 } 1685 } 1686 return buf; 1687} 1688 1689 1690static void 1691vmxnet3_set_mc(struct net_device *netdev) 1692{ 1693 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 1694 struct Vmxnet3_RxFilterConf *rxConf = 1695 &adapter->shared->devRead.rxFilterConf; 1696 u8 *new_table = NULL; 1697 u32 new_mode = VMXNET3_RXM_UCAST; 1698 1699 if (netdev->flags & IFF_PROMISC) 1700 new_mode |= VMXNET3_RXM_PROMISC; 1701 1702 if (netdev->flags & IFF_BROADCAST) 1703 new_mode |= VMXNET3_RXM_BCAST; 1704 1705 if (netdev->flags & IFF_ALLMULTI) 1706 new_mode |= VMXNET3_RXM_ALL_MULTI; 1707 else 1708 if (!netdev_mc_empty(netdev)) { 1709 new_table = vmxnet3_copy_mc(netdev); 1710 if (new_table) { 1711 new_mode |= VMXNET3_RXM_MCAST; 1712 rxConf->mfTableLen = cpu_to_le16( 1713 netdev_mc_count(netdev) * ETH_ALEN); 1714 rxConf->mfTablePA = cpu_to_le64(virt_to_phys( 1715 new_table)); 1716 } else { 1717 printk(KERN_INFO "%s: failed to copy mcast list" 1718 ", setting ALL_MULTI\n", netdev->name); 1719 new_mode |= VMXNET3_RXM_ALL_MULTI; 1720 } 1721 } 1722 1723 1724 if (!(new_mode & VMXNET3_RXM_MCAST)) { 1725 rxConf->mfTableLen = 0; 1726 rxConf->mfTablePA = 0; 1727 } 1728 1729 if (new_mode != rxConf->rxMode) { 1730 rxConf->rxMode = cpu_to_le32(new_mode); 1731 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 1732 VMXNET3_CMD_UPDATE_RX_MODE); 1733 } 1734 1735 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 1736 VMXNET3_CMD_UPDATE_MAC_FILTERS); 1737 1738 kfree(new_table); 1739} 1740 1741 1742/* 1743 * Set up driver_shared based on settings in adapter. 1744 */ 1745 1746static void 1747vmxnet3_setup_driver_shared(struct vmxnet3_adapter *adapter) 1748{ 1749 struct Vmxnet3_DriverShared *shared = adapter->shared; 1750 struct Vmxnet3_DSDevRead *devRead = &shared->devRead; 1751 struct Vmxnet3_TxQueueConf *tqc; 1752 struct Vmxnet3_RxQueueConf *rqc; 1753 int i; 1754 1755 memset(shared, 0, sizeof(*shared)); 1756 1757 /* driver settings */ 1758 shared->magic = cpu_to_le32(VMXNET3_REV1_MAGIC); 1759 devRead->misc.driverInfo.version = cpu_to_le32( 1760 VMXNET3_DRIVER_VERSION_NUM); 1761 devRead->misc.driverInfo.gos.gosBits = (sizeof(void *) == 4 ? 1762 VMXNET3_GOS_BITS_32 : VMXNET3_GOS_BITS_64); 1763 devRead->misc.driverInfo.gos.gosType = VMXNET3_GOS_TYPE_LINUX; 1764 *((u32 *)&devRead->misc.driverInfo.gos) = cpu_to_le32( 1765 *((u32 *)&devRead->misc.driverInfo.gos)); 1766 devRead->misc.driverInfo.vmxnet3RevSpt = cpu_to_le32(1); 1767 devRead->misc.driverInfo.uptVerSpt = cpu_to_le32(1); 1768 1769 devRead->misc.ddPA = cpu_to_le64(virt_to_phys(adapter)); 1770 devRead->misc.ddLen = cpu_to_le32(sizeof(struct vmxnet3_adapter)); 1771 1772 /* set up feature flags */ 1773 if (adapter->rxcsum) 1774 set_flag_le64(&devRead->misc.uptFeatures, UPT1_F_RXCSUM); 1775 1776 if (adapter->lro) { 1777 set_flag_le64(&devRead->misc.uptFeatures, UPT1_F_LRO); 1778 devRead->misc.maxNumRxSG = cpu_to_le16(1 + MAX_SKB_FRAGS); 1779 } 1780 if ((adapter->netdev->features & NETIF_F_HW_VLAN_RX) && 1781 adapter->vlan_grp) { 1782 set_flag_le64(&devRead->misc.uptFeatures, UPT1_F_RXVLAN); 1783 } 1784 1785 devRead->misc.mtu = cpu_to_le32(adapter->netdev->mtu); 1786 devRead->misc.queueDescPA = cpu_to_le64(adapter->queue_desc_pa); 1787 devRead->misc.queueDescLen = cpu_to_le32( 1788 sizeof(struct Vmxnet3_TxQueueDesc) + 1789 sizeof(struct Vmxnet3_RxQueueDesc)); 1790 1791 /* tx queue settings */ 1792 BUG_ON(adapter->tx_queue.tx_ring.base == NULL); 1793 1794 devRead->misc.numTxQueues = 1; 1795 tqc = &adapter->tqd_start->conf; 1796 tqc->txRingBasePA = cpu_to_le64(adapter->tx_queue.tx_ring.basePA); 1797 tqc->dataRingBasePA = cpu_to_le64(adapter->tx_queue.data_ring.basePA); 1798 tqc->compRingBasePA = cpu_to_le64(adapter->tx_queue.comp_ring.basePA); 1799 tqc->ddPA = cpu_to_le64(virt_to_phys( 1800 adapter->tx_queue.buf_info)); 1801 tqc->txRingSize = cpu_to_le32(adapter->tx_queue.tx_ring.size); 1802 tqc->dataRingSize = cpu_to_le32(adapter->tx_queue.data_ring.size); 1803 tqc->compRingSize = cpu_to_le32(adapter->tx_queue.comp_ring.size); 1804 tqc->ddLen = cpu_to_le32(sizeof(struct vmxnet3_tx_buf_info) * 1805 tqc->txRingSize); 1806 tqc->intrIdx = adapter->tx_queue.comp_ring.intr_idx; 1807 1808 /* rx queue settings */ 1809 devRead->misc.numRxQueues = 1; 1810 rqc = &adapter->rqd_start->conf; 1811 rqc->rxRingBasePA[0] = cpu_to_le64(adapter->rx_queue.rx_ring[0].basePA); 1812 rqc->rxRingBasePA[1] = cpu_to_le64(adapter->rx_queue.rx_ring[1].basePA); 1813 rqc->compRingBasePA = cpu_to_le64(adapter->rx_queue.comp_ring.basePA); 1814 rqc->ddPA = cpu_to_le64(virt_to_phys( 1815 adapter->rx_queue.buf_info)); 1816 rqc->rxRingSize[0] = cpu_to_le32(adapter->rx_queue.rx_ring[0].size); 1817 rqc->rxRingSize[1] = cpu_to_le32(adapter->rx_queue.rx_ring[1].size); 1818 rqc->compRingSize = cpu_to_le32(adapter->rx_queue.comp_ring.size); 1819 rqc->ddLen = cpu_to_le32(sizeof(struct vmxnet3_rx_buf_info) * 1820 (rqc->rxRingSize[0] + rqc->rxRingSize[1])); 1821 rqc->intrIdx = adapter->rx_queue.comp_ring.intr_idx; 1822 1823 /* intr settings */ 1824 devRead->intrConf.autoMask = adapter->intr.mask_mode == 1825 VMXNET3_IMM_AUTO; 1826 devRead->intrConf.numIntrs = adapter->intr.num_intrs; 1827 for (i = 0; i < adapter->intr.num_intrs; i++) 1828 devRead->intrConf.modLevels[i] = adapter->intr.mod_levels[i]; 1829 1830 devRead->intrConf.eventIntrIdx = adapter->intr.event_intr_idx; 1831 1832 /* rx filter settings */ 1833 devRead->rxFilterConf.rxMode = 0; 1834 vmxnet3_restore_vlan(adapter); 1835 /* the rest are already zeroed */ 1836} 1837 1838 1839int 1840vmxnet3_activate_dev(struct vmxnet3_adapter *adapter) 1841{ 1842 int err; 1843 u32 ret; 1844 1845 dev_dbg(&adapter->netdev->dev, 1846 "%s: skb_buf_size %d, rx_buf_per_pkt %d, ring sizes" 1847 " %u %u %u\n", adapter->netdev->name, adapter->skb_buf_size, 1848 adapter->rx_buf_per_pkt, adapter->tx_queue.tx_ring.size, 1849 adapter->rx_queue.rx_ring[0].size, 1850 adapter->rx_queue.rx_ring[1].size); 1851 1852 vmxnet3_tq_init(&adapter->tx_queue, adapter); 1853 err = vmxnet3_rq_init(&adapter->rx_queue, adapter); 1854 if (err) { 1855 printk(KERN_ERR "Failed to init rx queue for %s: error %d\n", 1856 adapter->netdev->name, err); 1857 goto rq_err; 1858 } 1859 1860 err = vmxnet3_request_irqs(adapter); 1861 if (err) { 1862 printk(KERN_ERR "Failed to setup irq for %s: error %d\n", 1863 adapter->netdev->name, err); 1864 goto irq_err; 1865 } 1866 1867 vmxnet3_setup_driver_shared(adapter); 1868 1869 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAL, VMXNET3_GET_ADDR_LO( 1870 adapter->shared_pa)); 1871 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAH, VMXNET3_GET_ADDR_HI( 1872 adapter->shared_pa)); 1873 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 1874 VMXNET3_CMD_ACTIVATE_DEV); 1875 ret = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD); 1876 1877 if (ret != 0) { 1878 printk(KERN_ERR "Failed to activate dev %s: error %u\n", 1879 adapter->netdev->name, ret); 1880 err = -EINVAL; 1881 goto activate_err; 1882 } 1883 VMXNET3_WRITE_BAR0_REG(adapter, VMXNET3_REG_RXPROD, 1884 adapter->rx_queue.rx_ring[0].next2fill); 1885 VMXNET3_WRITE_BAR0_REG(adapter, VMXNET3_REG_RXPROD2, 1886 adapter->rx_queue.rx_ring[1].next2fill); 1887 1888 /* Apply the rx filter settins last. */ 1889 vmxnet3_set_mc(adapter->netdev); 1890 1891 /* 1892 * Check link state when first activating device. It will start the 1893 * tx queue if the link is up. 1894 */ 1895 vmxnet3_check_link(adapter); 1896 1897 napi_enable(&adapter->napi); 1898 vmxnet3_enable_all_intrs(adapter); 1899 clear_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state); 1900 return 0; 1901 1902activate_err: 1903 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAL, 0); 1904 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAH, 0); 1905 vmxnet3_free_irqs(adapter); 1906irq_err: 1907rq_err: 1908 /* free up buffers we allocated */ 1909 vmxnet3_rq_cleanup(&adapter->rx_queue, adapter); 1910 return err; 1911} 1912 1913 1914void 1915vmxnet3_reset_dev(struct vmxnet3_adapter *adapter) 1916{ 1917 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_RESET_DEV); 1918} 1919 1920 1921int 1922vmxnet3_quiesce_dev(struct vmxnet3_adapter *adapter) 1923{ 1924 if (test_and_set_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state)) 1925 return 0; 1926 1927 1928 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 1929 VMXNET3_CMD_QUIESCE_DEV); 1930 vmxnet3_disable_all_intrs(adapter); 1931 1932 napi_disable(&adapter->napi); 1933 netif_tx_disable(adapter->netdev); 1934 adapter->link_speed = 0; 1935 netif_carrier_off(adapter->netdev); 1936 1937 vmxnet3_tq_cleanup(&adapter->tx_queue, adapter); 1938 vmxnet3_rq_cleanup(&adapter->rx_queue, adapter); 1939 vmxnet3_free_irqs(adapter); 1940 return 0; 1941} 1942 1943 1944static void 1945vmxnet3_write_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac) 1946{ 1947 u32 tmp; 1948 1949 tmp = *(u32 *)mac; 1950 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_MACL, tmp); 1951 1952 tmp = (mac[5] << 8) | mac[4]; 1953 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_MACH, tmp); 1954} 1955 1956 1957static int 1958vmxnet3_set_mac_addr(struct net_device *netdev, void *p) 1959{ 1960 struct sockaddr *addr = p; 1961 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 1962 1963 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); 1964 vmxnet3_write_mac_addr(adapter, addr->sa_data); 1965 1966 return 0; 1967} 1968 1969 1970/* ==================== initialization and cleanup routines ============ */ 1971 1972static int 1973vmxnet3_alloc_pci_resources(struct vmxnet3_adapter *adapter, bool *dma64) 1974{ 1975 int err; 1976 unsigned long mmio_start, mmio_len; 1977 struct pci_dev *pdev = adapter->pdev; 1978 1979 err = pci_enable_device(pdev); 1980 if (err) { 1981 printk(KERN_ERR "Failed to enable adapter %s: error %d\n", 1982 pci_name(pdev), err); 1983 return err; 1984 } 1985 1986 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) == 0) { 1987 if (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)) != 0) { 1988 printk(KERN_ERR "pci_set_consistent_dma_mask failed " 1989 "for adapter %s\n", pci_name(pdev)); 1990 err = -EIO; 1991 goto err_set_mask; 1992 } 1993 *dma64 = true; 1994 } else { 1995 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) { 1996 printk(KERN_ERR "pci_set_dma_mask failed for adapter " 1997 "%s\n", pci_name(pdev)); 1998 err = -EIO; 1999 goto err_set_mask; 2000 } 2001 *dma64 = false; 2002 } 2003 2004 err = pci_request_selected_regions(pdev, (1 << 2) - 1, 2005 vmxnet3_driver_name); 2006 if (err) { 2007 printk(KERN_ERR "Failed to request region for adapter %s: " 2008 "error %d\n", pci_name(pdev), err); 2009 goto err_set_mask; 2010 } 2011 2012 pci_set_master(pdev); 2013 2014 mmio_start = pci_resource_start(pdev, 0); 2015 mmio_len = pci_resource_len(pdev, 0); 2016 adapter->hw_addr0 = ioremap(mmio_start, mmio_len); 2017 if (!adapter->hw_addr0) { 2018 printk(KERN_ERR "Failed to map bar0 for adapter %s\n", 2019 pci_name(pdev)); 2020 err = -EIO; 2021 goto err_ioremap; 2022 } 2023 2024 mmio_start = pci_resource_start(pdev, 1); 2025 mmio_len = pci_resource_len(pdev, 1); 2026 adapter->hw_addr1 = ioremap(mmio_start, mmio_len); 2027 if (!adapter->hw_addr1) { 2028 printk(KERN_ERR "Failed to map bar1 for adapter %s\n", 2029 pci_name(pdev)); 2030 err = -EIO; 2031 goto err_bar1; 2032 } 2033 return 0; 2034 2035err_bar1: 2036 iounmap(adapter->hw_addr0); 2037err_ioremap: 2038 pci_release_selected_regions(pdev, (1 << 2) - 1); 2039err_set_mask: 2040 pci_disable_device(pdev); 2041 return err; 2042} 2043 2044 2045static void 2046vmxnet3_free_pci_resources(struct vmxnet3_adapter *adapter) 2047{ 2048 BUG_ON(!adapter->pdev); 2049 2050 iounmap(adapter->hw_addr0); 2051 iounmap(adapter->hw_addr1); 2052 pci_release_selected_regions(adapter->pdev, (1 << 2) - 1); 2053 pci_disable_device(adapter->pdev); 2054} 2055 2056 2057static void 2058vmxnet3_adjust_rx_ring_size(struct vmxnet3_adapter *adapter) 2059{ 2060 size_t sz; 2061 2062 if (adapter->netdev->mtu <= VMXNET3_MAX_SKB_BUF_SIZE - 2063 VMXNET3_MAX_ETH_HDR_SIZE) { 2064 adapter->skb_buf_size = adapter->netdev->mtu + 2065 VMXNET3_MAX_ETH_HDR_SIZE; 2066 if (adapter->skb_buf_size < VMXNET3_MIN_T0_BUF_SIZE) 2067 adapter->skb_buf_size = VMXNET3_MIN_T0_BUF_SIZE; 2068 2069 adapter->rx_buf_per_pkt = 1; 2070 } else { 2071 adapter->skb_buf_size = VMXNET3_MAX_SKB_BUF_SIZE; 2072 sz = adapter->netdev->mtu - VMXNET3_MAX_SKB_BUF_SIZE + 2073 VMXNET3_MAX_ETH_HDR_SIZE; 2074 adapter->rx_buf_per_pkt = 1 + (sz + PAGE_SIZE - 1) / PAGE_SIZE; 2075 } 2076 2077 /* 2078 * for simplicity, force the ring0 size to be a multiple of 2079 * rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN 2080 */ 2081 sz = adapter->rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN; 2082 adapter->rx_queue.rx_ring[0].size = (adapter->rx_queue.rx_ring[0].size + 2083 sz - 1) / sz * sz; 2084 adapter->rx_queue.rx_ring[0].size = min_t(u32, 2085 adapter->rx_queue.rx_ring[0].size, 2086 VMXNET3_RX_RING_MAX_SIZE / sz * sz); 2087} 2088 2089 2090int 2091vmxnet3_create_queues(struct vmxnet3_adapter *adapter, u32 tx_ring_size, 2092 u32 rx_ring_size, u32 rx_ring2_size) 2093{ 2094 int err; 2095 2096 adapter->tx_queue.tx_ring.size = tx_ring_size; 2097 adapter->tx_queue.data_ring.size = tx_ring_size; 2098 adapter->tx_queue.comp_ring.size = tx_ring_size; 2099 adapter->tx_queue.shared = &adapter->tqd_start->ctrl; 2100 adapter->tx_queue.stopped = true; 2101 err = vmxnet3_tq_create(&adapter->tx_queue, adapter); 2102 if (err) 2103 return err; 2104 2105 adapter->rx_queue.rx_ring[0].size = rx_ring_size; 2106 adapter->rx_queue.rx_ring[1].size = rx_ring2_size; 2107 vmxnet3_adjust_rx_ring_size(adapter); 2108 adapter->rx_queue.comp_ring.size = adapter->rx_queue.rx_ring[0].size + 2109 adapter->rx_queue.rx_ring[1].size; 2110 adapter->rx_queue.qid = 0; 2111 adapter->rx_queue.qid2 = 1; 2112 adapter->rx_queue.shared = &adapter->rqd_start->ctrl; 2113 err = vmxnet3_rq_create(&adapter->rx_queue, adapter); 2114 if (err) 2115 vmxnet3_tq_destroy(&adapter->tx_queue, adapter); 2116 2117 return err; 2118} 2119 2120static int 2121vmxnet3_open(struct net_device *netdev) 2122{ 2123 struct vmxnet3_adapter *adapter; 2124 int err; 2125 2126 adapter = netdev_priv(netdev); 2127 2128 spin_lock_init(&adapter->tx_queue.tx_lock); 2129 2130 err = vmxnet3_create_queues(adapter, VMXNET3_DEF_TX_RING_SIZE, 2131 VMXNET3_DEF_RX_RING_SIZE, 2132 VMXNET3_DEF_RX_RING_SIZE); 2133 if (err) 2134 goto queue_err; 2135 2136 err = vmxnet3_activate_dev(adapter); 2137 if (err) 2138 goto activate_err; 2139 2140 return 0; 2141 2142activate_err: 2143 vmxnet3_rq_destroy(&adapter->rx_queue, adapter); 2144 vmxnet3_tq_destroy(&adapter->tx_queue, adapter); 2145queue_err: 2146 return err; 2147} 2148 2149 2150static int 2151vmxnet3_close(struct net_device *netdev) 2152{ 2153 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 2154 2155 /* 2156 * Reset_work may be in the middle of resetting the device, wait for its 2157 * completion. 2158 */ 2159 while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state)) 2160 msleep(1); 2161 2162 vmxnet3_quiesce_dev(adapter); 2163 2164 vmxnet3_rq_destroy(&adapter->rx_queue, adapter); 2165 vmxnet3_tq_destroy(&adapter->tx_queue, adapter); 2166 2167 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state); 2168 2169 2170 return 0; 2171} 2172 2173 2174void 2175vmxnet3_force_close(struct vmxnet3_adapter *adapter) 2176{ 2177 /* 2178 * we must clear VMXNET3_STATE_BIT_RESETTING, otherwise 2179 * vmxnet3_close() will deadlock. 2180 */ 2181 BUG_ON(test_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state)); 2182 2183 /* we need to enable NAPI, otherwise dev_close will deadlock */ 2184 napi_enable(&adapter->napi); 2185 dev_close(adapter->netdev); 2186} 2187 2188 2189static int 2190vmxnet3_change_mtu(struct net_device *netdev, int new_mtu) 2191{ 2192 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 2193 int err = 0; 2194 2195 if (new_mtu < VMXNET3_MIN_MTU || new_mtu > VMXNET3_MAX_MTU) 2196 return -EINVAL; 2197 2198 if (new_mtu > 1500 && !adapter->jumbo_frame) 2199 return -EINVAL; 2200 2201 netdev->mtu = new_mtu; 2202 2203 /* 2204 * Reset_work may be in the middle of resetting the device, wait for its 2205 * completion. 2206 */ 2207 while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state)) 2208 msleep(1); 2209 2210 if (netif_running(netdev)) { 2211 vmxnet3_quiesce_dev(adapter); 2212 vmxnet3_reset_dev(adapter); 2213 2214 /* we need to re-create the rx queue based on the new mtu */ 2215 vmxnet3_rq_destroy(&adapter->rx_queue, adapter); 2216 vmxnet3_adjust_rx_ring_size(adapter); 2217 adapter->rx_queue.comp_ring.size = 2218 adapter->rx_queue.rx_ring[0].size + 2219 adapter->rx_queue.rx_ring[1].size; 2220 err = vmxnet3_rq_create(&adapter->rx_queue, adapter); 2221 if (err) { 2222 printk(KERN_ERR "%s: failed to re-create rx queue," 2223 " error %d. Closing it.\n", netdev->name, err); 2224 goto out; 2225 } 2226 2227 err = vmxnet3_activate_dev(adapter); 2228 if (err) { 2229 printk(KERN_ERR "%s: failed to re-activate, error %d. " 2230 "Closing it\n", netdev->name, err); 2231 goto out; 2232 } 2233 } 2234 2235out: 2236 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state); 2237 if (err) 2238 vmxnet3_force_close(adapter); 2239 2240 return err; 2241} 2242 2243 2244static void 2245vmxnet3_declare_features(struct vmxnet3_adapter *adapter, bool dma64) 2246{ 2247 struct net_device *netdev = adapter->netdev; 2248 2249 netdev->features = NETIF_F_SG | 2250 NETIF_F_HW_CSUM | 2251 NETIF_F_HW_VLAN_TX | 2252 NETIF_F_HW_VLAN_RX | 2253 NETIF_F_HW_VLAN_FILTER | 2254 NETIF_F_TSO | 2255 NETIF_F_TSO6 | 2256 NETIF_F_LRO; 2257 2258 printk(KERN_INFO "features: sg csum vlan jf tso tsoIPv6 lro"); 2259 2260 adapter->rxcsum = true; 2261 adapter->jumbo_frame = true; 2262 adapter->lro = true; 2263 2264 if (dma64) { 2265 netdev->features |= NETIF_F_HIGHDMA; 2266 printk(" highDMA"); 2267 } 2268 2269 netdev->vlan_features = netdev->features; 2270 printk("\n"); 2271} 2272 2273 2274static void 2275vmxnet3_read_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac) 2276{ 2277 u32 tmp; 2278 2279 tmp = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_MACL); 2280 *(u32 *)mac = tmp; 2281 2282 tmp = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_MACH); 2283 mac[4] = tmp & 0xff; 2284 mac[5] = (tmp >> 8) & 0xff; 2285} 2286 2287 2288static void 2289vmxnet3_alloc_intr_resources(struct vmxnet3_adapter *adapter) 2290{ 2291 u32 cfg; 2292 2293 /* intr settings */ 2294 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 2295 VMXNET3_CMD_GET_CONF_INTR); 2296 cfg = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD); 2297 adapter->intr.type = cfg & 0x3; 2298 adapter->intr.mask_mode = (cfg >> 2) & 0x3; 2299 2300 if (adapter->intr.type == VMXNET3_IT_AUTO) { 2301 int err; 2302 2303#ifdef CONFIG_PCI_MSI 2304 adapter->intr.msix_entries[0].entry = 0; 2305 err = pci_enable_msix(adapter->pdev, adapter->intr.msix_entries, 2306 VMXNET3_LINUX_MAX_MSIX_VECT); 2307 if (!err) { 2308 adapter->intr.num_intrs = 1; 2309 adapter->intr.type = VMXNET3_IT_MSIX; 2310 return; 2311 } 2312#endif 2313 2314 err = pci_enable_msi(adapter->pdev); 2315 if (!err) { 2316 adapter->intr.num_intrs = 1; 2317 adapter->intr.type = VMXNET3_IT_MSI; 2318 return; 2319 } 2320 } 2321 2322 adapter->intr.type = VMXNET3_IT_INTX; 2323 2324 /* INT-X related setting */ 2325 adapter->intr.num_intrs = 1; 2326} 2327 2328 2329static void 2330vmxnet3_free_intr_resources(struct vmxnet3_adapter *adapter) 2331{ 2332 if (adapter->intr.type == VMXNET3_IT_MSIX) 2333 pci_disable_msix(adapter->pdev); 2334 else if (adapter->intr.type == VMXNET3_IT_MSI) 2335 pci_disable_msi(adapter->pdev); 2336 else 2337 BUG_ON(adapter->intr.type != VMXNET3_IT_INTX); 2338} 2339 2340 2341static void 2342vmxnet3_tx_timeout(struct net_device *netdev) 2343{ 2344 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 2345 adapter->tx_timeout_count++; 2346 2347 printk(KERN_ERR "%s: tx hang\n", adapter->netdev->name); 2348 schedule_work(&adapter->work); 2349} 2350 2351 2352static void 2353vmxnet3_reset_work(struct work_struct *data) 2354{ 2355 struct vmxnet3_adapter *adapter; 2356 2357 adapter = container_of(data, struct vmxnet3_adapter, work); 2358 2359 /* if another thread is resetting the device, no need to proceed */ 2360 if (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state)) 2361 return; 2362 2363 /* if the device is closed, we must leave it alone */ 2364 if (netif_running(adapter->netdev)) { 2365 printk(KERN_INFO "%s: resetting\n", adapter->netdev->name); 2366 vmxnet3_quiesce_dev(adapter); 2367 vmxnet3_reset_dev(adapter); 2368 vmxnet3_activate_dev(adapter); 2369 } else { 2370 printk(KERN_INFO "%s: already closed\n", adapter->netdev->name); 2371 } 2372 2373 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state); 2374} 2375 2376 2377static int __devinit 2378vmxnet3_probe_device(struct pci_dev *pdev, 2379 const struct pci_device_id *id) 2380{ 2381 static const struct net_device_ops vmxnet3_netdev_ops = { 2382 .ndo_open = vmxnet3_open, 2383 .ndo_stop = vmxnet3_close, 2384 .ndo_start_xmit = vmxnet3_xmit_frame, 2385 .ndo_set_mac_address = vmxnet3_set_mac_addr, 2386 .ndo_change_mtu = vmxnet3_change_mtu, 2387 .ndo_get_stats = vmxnet3_get_stats, 2388 .ndo_tx_timeout = vmxnet3_tx_timeout, 2389 .ndo_set_multicast_list = vmxnet3_set_mc, 2390 .ndo_vlan_rx_register = vmxnet3_vlan_rx_register, 2391 .ndo_vlan_rx_add_vid = vmxnet3_vlan_rx_add_vid, 2392 .ndo_vlan_rx_kill_vid = vmxnet3_vlan_rx_kill_vid, 2393#ifdef CONFIG_NET_POLL_CONTROLLER 2394 .ndo_poll_controller = vmxnet3_netpoll, 2395#endif 2396 }; 2397 int err; 2398 bool dma64 = false; /* stupid gcc */ 2399 u32 ver; 2400 struct net_device *netdev; 2401 struct vmxnet3_adapter *adapter; 2402 u8 mac[ETH_ALEN]; 2403 2404 netdev = alloc_etherdev(sizeof(struct vmxnet3_adapter)); 2405 if (!netdev) { 2406 printk(KERN_ERR "Failed to alloc ethernet device for adapter " 2407 "%s\n", pci_name(pdev)); 2408 return -ENOMEM; 2409 } 2410 2411 pci_set_drvdata(pdev, netdev); 2412 adapter = netdev_priv(netdev); 2413 adapter->netdev = netdev; 2414 adapter->pdev = pdev; 2415 2416 adapter->shared = pci_alloc_consistent(adapter->pdev, 2417 sizeof(struct Vmxnet3_DriverShared), 2418 &adapter->shared_pa); 2419 if (!adapter->shared) { 2420 printk(KERN_ERR "Failed to allocate memory for %s\n", 2421 pci_name(pdev)); 2422 err = -ENOMEM; 2423 goto err_alloc_shared; 2424 } 2425 2426 adapter->tqd_start = pci_alloc_consistent(adapter->pdev, 2427 sizeof(struct Vmxnet3_TxQueueDesc) + 2428 sizeof(struct Vmxnet3_RxQueueDesc), 2429 &adapter->queue_desc_pa); 2430 2431 if (!adapter->tqd_start) { 2432 printk(KERN_ERR "Failed to allocate memory for %s\n", 2433 pci_name(pdev)); 2434 err = -ENOMEM; 2435 goto err_alloc_queue_desc; 2436 } 2437 adapter->rqd_start = (struct Vmxnet3_RxQueueDesc *)(adapter->tqd_start 2438 + 1); 2439 2440 adapter->pm_conf = kmalloc(sizeof(struct Vmxnet3_PMConf), GFP_KERNEL); 2441 if (adapter->pm_conf == NULL) { 2442 printk(KERN_ERR "Failed to allocate memory for %s\n", 2443 pci_name(pdev)); 2444 err = -ENOMEM; 2445 goto err_alloc_pm; 2446 } 2447 2448 err = vmxnet3_alloc_pci_resources(adapter, &dma64); 2449 if (err < 0) 2450 goto err_alloc_pci; 2451 2452 ver = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_VRRS); 2453 if (ver & 1) { 2454 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_VRRS, 1); 2455 } else { 2456 printk(KERN_ERR "Incompatible h/w version (0x%x) for adapter" 2457 " %s\n", ver, pci_name(pdev)); 2458 err = -EBUSY; 2459 goto err_ver; 2460 } 2461 2462 ver = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_UVRS); 2463 if (ver & 1) { 2464 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_UVRS, 1); 2465 } else { 2466 printk(KERN_ERR "Incompatible upt version (0x%x) for " 2467 "adapter %s\n", ver, pci_name(pdev)); 2468 err = -EBUSY; 2469 goto err_ver; 2470 } 2471 2472 vmxnet3_declare_features(adapter, dma64); 2473 2474 adapter->dev_number = atomic_read(&devices_found); 2475 vmxnet3_alloc_intr_resources(adapter); 2476 2477 vmxnet3_read_mac_addr(adapter, mac); 2478 memcpy(netdev->dev_addr, mac, netdev->addr_len); 2479 2480 netdev->netdev_ops = &vmxnet3_netdev_ops; 2481 netdev->watchdog_timeo = 5 * HZ; 2482 vmxnet3_set_ethtool_ops(netdev); 2483 2484 INIT_WORK(&adapter->work, vmxnet3_reset_work); 2485 2486 netif_napi_add(netdev, &adapter->napi, vmxnet3_poll, 64); 2487 SET_NETDEV_DEV(netdev, &pdev->dev); 2488 err = register_netdev(netdev); 2489 2490 if (err) { 2491 printk(KERN_ERR "Failed to register adapter %s\n", 2492 pci_name(pdev)); 2493 goto err_register; 2494 } 2495 2496 set_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state); 2497 atomic_inc(&devices_found); 2498 return 0; 2499 2500err_register: 2501 vmxnet3_free_intr_resources(adapter); 2502err_ver: 2503 vmxnet3_free_pci_resources(adapter); 2504err_alloc_pci: 2505 kfree(adapter->pm_conf); 2506err_alloc_pm: 2507 pci_free_consistent(adapter->pdev, sizeof(struct Vmxnet3_TxQueueDesc) + 2508 sizeof(struct Vmxnet3_RxQueueDesc), 2509 adapter->tqd_start, adapter->queue_desc_pa); 2510err_alloc_queue_desc: 2511 pci_free_consistent(adapter->pdev, sizeof(struct Vmxnet3_DriverShared), 2512 adapter->shared, adapter->shared_pa); 2513err_alloc_shared: 2514 pci_set_drvdata(pdev, NULL); 2515 free_netdev(netdev); 2516 return err; 2517} 2518 2519 2520static void __devexit 2521vmxnet3_remove_device(struct pci_dev *pdev) 2522{ 2523 struct net_device *netdev = pci_get_drvdata(pdev); 2524 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 2525 2526 flush_scheduled_work(); 2527 2528 unregister_netdev(netdev); 2529 2530 vmxnet3_free_intr_resources(adapter); 2531 vmxnet3_free_pci_resources(adapter); 2532 kfree(adapter->pm_conf); 2533 pci_free_consistent(adapter->pdev, sizeof(struct Vmxnet3_TxQueueDesc) + 2534 sizeof(struct Vmxnet3_RxQueueDesc), 2535 adapter->tqd_start, adapter->queue_desc_pa); 2536 pci_free_consistent(adapter->pdev, sizeof(struct Vmxnet3_DriverShared), 2537 adapter->shared, adapter->shared_pa); 2538 free_netdev(netdev); 2539} 2540 2541 2542#ifdef CONFIG_PM 2543 2544static int 2545vmxnet3_suspend(struct device *device) 2546{ 2547 struct pci_dev *pdev = to_pci_dev(device); 2548 struct net_device *netdev = pci_get_drvdata(pdev); 2549 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 2550 struct Vmxnet3_PMConf *pmConf; 2551 struct ethhdr *ehdr; 2552 struct arphdr *ahdr; 2553 u8 *arpreq; 2554 struct in_device *in_dev; 2555 struct in_ifaddr *ifa; 2556 int i = 0; 2557 2558 if (!netif_running(netdev)) 2559 return 0; 2560 2561 vmxnet3_disable_all_intrs(adapter); 2562 vmxnet3_free_irqs(adapter); 2563 vmxnet3_free_intr_resources(adapter); 2564 2565 netif_device_detach(netdev); 2566 netif_stop_queue(netdev); 2567 2568 /* Create wake-up filters. */ 2569 pmConf = adapter->pm_conf; 2570 memset(pmConf, 0, sizeof(*pmConf)); 2571 2572 if (adapter->wol & WAKE_UCAST) { 2573 pmConf->filters[i].patternSize = ETH_ALEN; 2574 pmConf->filters[i].maskSize = 1; 2575 memcpy(pmConf->filters[i].pattern, netdev->dev_addr, ETH_ALEN); 2576 pmConf->filters[i].mask[0] = 0x3F; /* LSB ETH_ALEN bits */ 2577 2578 set_flag_le16(&pmConf->wakeUpEvents, VMXNET3_PM_WAKEUP_FILTER); 2579 i++; 2580 } 2581 2582 if (adapter->wol & WAKE_ARP) { 2583 in_dev = in_dev_get(netdev); 2584 if (!in_dev) 2585 goto skip_arp; 2586 2587 ifa = (struct in_ifaddr *)in_dev->ifa_list; 2588 if (!ifa) 2589 goto skip_arp; 2590 2591 pmConf->filters[i].patternSize = ETH_HLEN + /* Ethernet header*/ 2592 sizeof(struct arphdr) + /* ARP header */ 2593 2 * ETH_ALEN + /* 2 Ethernet addresses*/ 2594 2 * sizeof(u32); /*2 IPv4 addresses */ 2595 pmConf->filters[i].maskSize = 2596 (pmConf->filters[i].patternSize - 1) / 8 + 1; 2597 2598 /* ETH_P_ARP in Ethernet header. */ 2599 ehdr = (struct ethhdr *)pmConf->filters[i].pattern; 2600 ehdr->h_proto = htons(ETH_P_ARP); 2601 2602 /* ARPOP_REQUEST in ARP header. */ 2603 ahdr = (struct arphdr *)&pmConf->filters[i].pattern[ETH_HLEN]; 2604 ahdr->ar_op = htons(ARPOP_REQUEST); 2605 arpreq = (u8 *)(ahdr + 1); 2606 2607 /* The Unicast IPv4 address in 'tip' field. */ 2608 arpreq += 2 * ETH_ALEN + sizeof(u32); 2609 *(u32 *)arpreq = ifa->ifa_address; 2610 2611 /* The mask for the relevant bits. */ 2612 pmConf->filters[i].mask[0] = 0x00; 2613 pmConf->filters[i].mask[1] = 0x30; /* ETH_P_ARP */ 2614 pmConf->filters[i].mask[2] = 0x30; /* ARPOP_REQUEST */ 2615 pmConf->filters[i].mask[3] = 0x00; 2616 pmConf->filters[i].mask[4] = 0xC0; /* IPv4 TIP */ 2617 pmConf->filters[i].mask[5] = 0x03; /* IPv4 TIP */ 2618 in_dev_put(in_dev); 2619 2620 set_flag_le16(&pmConf->wakeUpEvents, VMXNET3_PM_WAKEUP_FILTER); 2621 i++; 2622 } 2623 2624skip_arp: 2625 if (adapter->wol & WAKE_MAGIC) 2626 set_flag_le16(&pmConf->wakeUpEvents, VMXNET3_PM_WAKEUP_MAGIC); 2627 2628 pmConf->numFilters = i; 2629 2630 adapter->shared->devRead.pmConfDesc.confVer = cpu_to_le32(1); 2631 adapter->shared->devRead.pmConfDesc.confLen = cpu_to_le32(sizeof( 2632 *pmConf)); 2633 adapter->shared->devRead.pmConfDesc.confPA = cpu_to_le64(virt_to_phys( 2634 pmConf)); 2635 2636 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 2637 VMXNET3_CMD_UPDATE_PMCFG); 2638 2639 pci_save_state(pdev); 2640 pci_enable_wake(pdev, pci_choose_state(pdev, PMSG_SUSPEND), 2641 adapter->wol); 2642 pci_disable_device(pdev); 2643 pci_set_power_state(pdev, pci_choose_state(pdev, PMSG_SUSPEND)); 2644 2645 return 0; 2646} 2647 2648 2649static int 2650vmxnet3_resume(struct device *device) 2651{ 2652 int err; 2653 struct pci_dev *pdev = to_pci_dev(device); 2654 struct net_device *netdev = pci_get_drvdata(pdev); 2655 struct vmxnet3_adapter *adapter = netdev_priv(netdev); 2656 struct Vmxnet3_PMConf *pmConf; 2657 2658 if (!netif_running(netdev)) 2659 return 0; 2660 2661 /* Destroy wake-up filters. */ 2662 pmConf = adapter->pm_conf; 2663 memset(pmConf, 0, sizeof(*pmConf)); 2664 2665 adapter->shared->devRead.pmConfDesc.confVer = cpu_to_le32(1); 2666 adapter->shared->devRead.pmConfDesc.confLen = cpu_to_le32(sizeof( 2667 *pmConf)); 2668 adapter->shared->devRead.pmConfDesc.confPA = cpu_to_le32(virt_to_phys( 2669 pmConf)); 2670 2671 netif_device_attach(netdev); 2672 pci_set_power_state(pdev, PCI_D0); 2673 pci_restore_state(pdev); 2674 err = pci_enable_device_mem(pdev); 2675 if (err != 0) 2676 return err; 2677 2678 pci_enable_wake(pdev, PCI_D0, 0); 2679 2680 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, 2681 VMXNET3_CMD_UPDATE_PMCFG); 2682 vmxnet3_alloc_intr_resources(adapter); 2683 vmxnet3_request_irqs(adapter); 2684 vmxnet3_enable_all_intrs(adapter); 2685 2686 return 0; 2687} 2688 2689static const struct dev_pm_ops vmxnet3_pm_ops = { 2690 .suspend = vmxnet3_suspend, 2691 .resume = vmxnet3_resume, 2692}; 2693#endif 2694 2695static struct pci_driver vmxnet3_driver = { 2696 .name = vmxnet3_driver_name, 2697 .id_table = vmxnet3_pciid_table, 2698 .probe = vmxnet3_probe_device, 2699 .remove = __devexit_p(vmxnet3_remove_device), 2700#ifdef CONFIG_PM 2701 .driver.pm = &vmxnet3_pm_ops, 2702#endif 2703}; 2704 2705 2706static int __init 2707vmxnet3_init_module(void) 2708{ 2709 printk(KERN_INFO "%s - version %s\n", VMXNET3_DRIVER_DESC, 2710 VMXNET3_DRIVER_VERSION_REPORT); 2711 return pci_register_driver(&vmxnet3_driver); 2712} 2713 2714module_init(vmxnet3_init_module); 2715 2716 2717static void 2718vmxnet3_exit_module(void) 2719{ 2720 pci_unregister_driver(&vmxnet3_driver); 2721} 2722 2723module_exit(vmxnet3_exit_module); 2724 2725MODULE_AUTHOR("VMware, Inc."); 2726MODULE_DESCRIPTION(VMXNET3_DRIVER_DESC); 2727MODULE_LICENSE("GPL v2"); 2728MODULE_VERSION(VMXNET3_DRIVER_VERSION_STRING); 2729