drivers/net/vmxnet3/vmxnet3_drv.c

   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
  31 char 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  */
  38 static DEFINE_PCI_DEVICE_TABLE(vmxnet3_pciid_table) = {
  39         {PCI_VDEVICE(VMWARE, PCI_DEVICE_ID_VMWARE_VMXNET3)},
  40         {0}
  41 };
  42
  43 MODULE_DEVICE_TABLE(pci, vmxnet3_pciid_table);
  44
  45 static atomic_t devices_found;
  46
  47 #define VMXNET3_MAX_DEVICES 10
  48 static int enable_mq = 1;
  49 static int irq_share_mode;
  50
  51 /*
  52  *    Enable/Disable the given intr
  53  */
  54 static void
  55 vmxnet3_enable_intr(struct vmxnet3_adapter *adapter, unsigned intr_idx)
  56 {
  57         VMXNET3_WRITE_BAR0_REG(adapter, VMXNET3_REG_IMR + intr_idx * 8, 0);
  58 }
  59
  60
  61 static void
  62 vmxnet3_disable_intr(struct vmxnet3_adapter *adapter, unsigned intr_idx)
  63 {
  64         VMXNET3_WRITE_BAR0_REG(adapter, VMXNET3_REG_IMR + intr_idx * 8, 1);
  65 }
  66
  67
  68 /*
  69  *    Enable/Disable all intrs used by the device
  70  */
  71 static void
  72 vmxnet3_enable_all_intrs(struct vmxnet3_adapter *adapter)
  73 {
  74         int i;
  75
  76         for (i = 0; i < adapter->intr.num_intrs; i++)
  77                 vmxnet3_enable_intr(adapter, i);
  78         adapter->shared->devRead.intrConf.intrCtrl &=
  79                                         cpu_to_le32(~VMXNET3_IC_DISABLE_ALL);
  80 }
  81
  82
  83 static void
  84 vmxnet3_disable_all_intrs(struct vmxnet3_adapter *adapter)
  85 {
  86         int i;
  87
  88         adapter->shared->devRead.intrConf.intrCtrl |=
  89                                         cpu_to_le32(VMXNET3_IC_DISABLE_ALL);
  90         for (i = 0; i < adapter->intr.num_intrs; i++)
  91                 vmxnet3_disable_intr(adapter, i);
  92 }
  93
  94
  95 static void
  96 vmxnet3_ack_events(struct vmxnet3_adapter *adapter, u32 events)
  97 {
  98         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_ECR, events);
  99 }
 100
 101
 102 static bool
 103 vmxnet3_tq_stopped(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter)
 104 {
 105         return tq->stopped;
 106 }
 107
 108
 109 static void
 110 vmxnet3_tq_start(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter)
 111 {
 112         tq->stopped = false;
 113         netif_start_subqueue(adapter->netdev, tq - adapter->tx_queue);
 114 }
 115
 116
 117 static void
 118 vmxnet3_tq_wake(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter)
 119 {
 120         tq->stopped = false;
 121         netif_wake_subqueue(adapter->netdev, (tq - adapter->tx_queue));
 122 }
 123
 124
 125 static void
 126 vmxnet3_tq_stop(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter)
 127 {
 128         tq->stopped = true;
 129         tq->num_stop++;
 130         netif_stop_subqueue(adapter->netdev, (tq - adapter->tx_queue));
 131 }
 132
 133
 134 /*
 135  * Check the link state. This may start or stop the tx queue.
 136  */
 137 static void
 138 vmxnet3_check_link(struct vmxnet3_adapter *adapter, bool affectTxQueue)
 139 {
 140         u32 ret;
 141         int i;
 142
 143         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_GET_LINK);
 144         ret = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);
 145         adapter->link_speed = ret >> 16;
 146         if (ret & 1) { /* Link is up. */
 147                 printk(KERN_INFO "%s: NIC Link is Up %d Mbps\n",
 148                        adapter->netdev->name, adapter->link_speed);
 149                 if (!netif_carrier_ok(adapter->netdev))
 150                         netif_carrier_on(adapter->netdev);
 151
 152                 if (affectTxQueue) {
 153                         for (i = 0; i < adapter->num_tx_queues; i++)
 154                                 vmxnet3_tq_start(&adapter->tx_queue[i],
 155                                                  adapter);
 156                 }
 157         } else {
 158                 printk(KERN_INFO "%s: NIC Link is Down\n",
 159                        adapter->netdev->name);
 160                 if (netif_carrier_ok(adapter->netdev))
 161                         netif_carrier_off(adapter->netdev);
 162
 163                 if (affectTxQueue) {
 164                         for (i = 0; i < adapter->num_tx_queues; i++)
 165                                 vmxnet3_tq_stop(&adapter->tx_queue[i], adapter);
 166                 }
 167         }
 168 }
 169
 170 static void
 171 vmxnet3_process_events(struct vmxnet3_adapter *adapter)
 172 {
 173         int i;
 174         u32 events = le32_to_cpu(adapter->shared->ecr);
 175         if (!events)
 176                 return;
 177
 178         vmxnet3_ack_events(adapter, events);
 179
 180         /* Check if link state has changed */
 181         if (events & VMXNET3_ECR_LINK)
 182                 vmxnet3_check_link(adapter, true);
 183
 184         /* Check if there is an error on xmit/recv queues */
 185         if (events & (VMXNET3_ECR_TQERR | VMXNET3_ECR_RQERR)) {
 186                 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
 187                                        VMXNET3_CMD_GET_QUEUE_STATUS);
 188
 189                 for (i = 0; i < adapter->num_tx_queues; i++)
 190                         if (adapter->tqd_start[i].status.stopped)
 191                                 dev_err(&adapter->netdev->dev,
 192                                         "%s: tq[%d] error 0x%x\n",
 193                                         adapter->netdev->name, i, le32_to_cpu(
 194                                         adapter->tqd_start[i].status.error));
 195                 for (i = 0; i < adapter->num_rx_queues; i++)
 196                         if (adapter->rqd_start[i].status.stopped)
 197                                 dev_err(&adapter->netdev->dev,
 198                                         "%s: rq[%d] error 0x%x\n",
 199                                         adapter->netdev->name, i,
 200                                         adapter->rqd_start[i].status.error);
 201
 202                 schedule_work(&adapter->work);
 203         }
 204 }
 205
 206 #ifdef __BIG_ENDIAN_BITFIELD
 207 /*
 208  * The device expects the bitfields in shared structures to be written in
 209  * little endian. When CPU is big endian, the following routines are used to
 210  * correctly read and write into ABI.
 211  * The general technique used here is : double word bitfields are defined in
 212  * opposite order for big endian architecture. Then before reading them in
 213  * driver the complete double word is translated using le32_to_cpu. Similarly
 214  * After the driver writes into bitfields, cpu_to_le32 is used to translate the
 215  * double words into required format.
 216  * In order to avoid touching bits in shared structure more than once, temporary
 217  * descriptors are used. These are passed as srcDesc to following functions.
 218  */
 219 static void vmxnet3_RxDescToCPU(const struct Vmxnet3_RxDesc *srcDesc,
 220                                 struct Vmxnet3_RxDesc *dstDesc)
 221 {
 222         u32 *src = (u32 *)srcDesc + 2;
 223         u32 *dst = (u32 *)dstDesc + 2;
 224         dstDesc->addr = le64_to_cpu(srcDesc->addr);
 225         *dst = le32_to_cpu(*src);
 226         dstDesc->ext1 = le32_to_cpu(srcDesc->ext1);
 227 }
 228
 229 static void vmxnet3_TxDescToLe(const struct Vmxnet3_TxDesc *srcDesc,
 230                                struct Vmxnet3_TxDesc *dstDesc)
 231 {
 232         int i;
 233         u32 *src = (u32 *)(srcDesc + 1);
 234         u32 *dst = (u32 *)(dstDesc + 1);
 235
 236         /* Working backwards so that the gen bit is set at the end. */
 237         for (i = 2; i > 0; i--) {
 238                 src--;
 239                 dst--;
 240                 *dst = cpu_to_le32(*src);
 241         }
 242 }
 243
 244
 245 static void vmxnet3_RxCompToCPU(const struct Vmxnet3_RxCompDesc *srcDesc,
 246                                 struct Vmxnet3_RxCompDesc *dstDesc)
 247 {
 248         int i = 0;
 249         u32 *src = (u32 *)srcDesc;
 250         u32 *dst = (u32 *)dstDesc;
 251         for (i = 0; i < sizeof(struct Vmxnet3_RxCompDesc) / sizeof(u32); i++) {
 252                 *dst = le32_to_cpu(*src);
 253                 src++;
 254                 dst++;
 255         }
 256 }
 257
 258
 259 /* Used to read bitfield values from double words. */
 260 static u32 get_bitfield32(const __le32 *bitfield, u32 pos, u32 size)
 261 {
 262         u32 temp = le32_to_cpu(*bitfield);
 263         u32 mask = ((1 << size) - 1) << pos;
 264         temp &= mask;
 265         temp >>= pos;
 266         return temp;
 267 }
 268
 269
 270
 271 #endif  /* __BIG_ENDIAN_BITFIELD */
 272
 273 #ifdef __BIG_ENDIAN_BITFIELD
 274
 275 #   define VMXNET3_TXDESC_GET_GEN(txdesc) get_bitfield32(((const __le32 *) \
 276                         txdesc) + VMXNET3_TXD_GEN_DWORD_SHIFT, \
 277                         VMXNET3_TXD_GEN_SHIFT, VMXNET3_TXD_GEN_SIZE)
 278 #   define VMXNET3_TXDESC_GET_EOP(txdesc) get_bitfield32(((const __le32 *) \
 279                         txdesc) + VMXNET3_TXD_EOP_DWORD_SHIFT, \
 280                         VMXNET3_TXD_EOP_SHIFT, VMXNET3_TXD_EOP_SIZE)
 281 #   define VMXNET3_TCD_GET_GEN(tcd) get_bitfield32(((const __le32 *)tcd) + \
 282                         VMXNET3_TCD_GEN_DWORD_SHIFT, VMXNET3_TCD_GEN_SHIFT, \
 283                         VMXNET3_TCD_GEN_SIZE)
 284 #   define VMXNET3_TCD_GET_TXIDX(tcd) get_bitfield32((const __le32 *)tcd, \
 285                         VMXNET3_TCD_TXIDX_SHIFT, VMXNET3_TCD_TXIDX_SIZE)
 286 #   define vmxnet3_getRxComp(dstrcd, rcd, tmp) do { \
 287                         (dstrcd) = (tmp); \
 288                         vmxnet3_RxCompToCPU((rcd), (tmp)); \
 289                 } while (0)
 290 #   define vmxnet3_getRxDesc(dstrxd, rxd, tmp) do { \
 291                         (dstrxd) = (tmp); \
 292                         vmxnet3_RxDescToCPU((rxd), (tmp)); \
 293                 } while (0)
 294
 295 #else
 296
 297 #   define VMXNET3_TXDESC_GET_GEN(txdesc) ((txdesc)->gen)
 298 #   define VMXNET3_TXDESC_GET_EOP(txdesc) ((txdesc)->eop)
 299 #   define VMXNET3_TCD_GET_GEN(tcd) ((tcd)->gen)
 300 #   define VMXNET3_TCD_GET_TXIDX(tcd) ((tcd)->txdIdx)
 301 #   define vmxnet3_getRxComp(dstrcd, rcd, tmp) (dstrcd) = (rcd)
 302 #   define vmxnet3_getRxDesc(dstrxd, rxd, tmp) (dstrxd) = (rxd)
 303
 304 #endif /* __BIG_ENDIAN_BITFIELD  */
 305
 306
 307 static void
 308 vmxnet3_unmap_tx_buf(struct vmxnet3_tx_buf_info *tbi,
 309                      struct pci_dev *pdev)
 310 {
 311         if (tbi->map_type == VMXNET3_MAP_SINGLE)
 312                 pci_unmap_single(pdev, tbi->dma_addr, tbi->len,
 313                                  PCI_DMA_TODEVICE);
 314         else if (tbi->map_type == VMXNET3_MAP_PAGE)
 315                 pci_unmap_page(pdev, tbi->dma_addr, tbi->len,
 316                                PCI_DMA_TODEVICE);
 317         else
 318                 BUG_ON(tbi->map_type != VMXNET3_MAP_NONE);
 319
 320         tbi->map_type = VMXNET3_MAP_NONE; /* to help debugging */
 321 }
 322
 323
 324 static int
 325 vmxnet3_unmap_pkt(u32 eop_idx, struct vmxnet3_tx_queue *tq,
 326                   struct pci_dev *pdev, struct vmxnet3_adapter *adapter)
 327 {
 328         struct sk_buff *skb;
 329         int entries = 0;
 330
 331         /* no out of order completion */
 332         BUG_ON(tq->buf_info[eop_idx].sop_idx != tq->tx_ring.next2comp);
 333         BUG_ON(VMXNET3_TXDESC_GET_EOP(&(tq->tx_ring.base[eop_idx].txd)) != 1);
 334
 335         skb = tq->buf_info[eop_idx].skb;
 336         BUG_ON(skb == NULL);
 337         tq->buf_info[eop_idx].skb = NULL;
 338
 339         VMXNET3_INC_RING_IDX_ONLY(eop_idx, tq->tx_ring.size);
 340
 341         while (tq->tx_ring.next2comp != eop_idx) {
 342                 vmxnet3_unmap_tx_buf(tq->buf_info + tq->tx_ring.next2comp,
 343                                      pdev);
 344
 345                 /* update next2comp w/o tx_lock. Since we are marking more,
 346                  * instead of less, tx ring entries avail, the worst case is
 347                  * that the tx routine incorrectly re-queues a pkt due to
 348                  * insufficient tx ring entries.
 349                  */
 350                 vmxnet3_cmd_ring_adv_next2comp(&tq->tx_ring);
 351                 entries++;
 352         }
 353
 354         dev_kfree_skb_any(skb);
 355         return entries;
 356 }
 357
 358
 359 static int
 360 vmxnet3_tq_tx_complete(struct vmxnet3_tx_queue *tq,
 361                         struct vmxnet3_adapter *adapter)
 362 {
 363         int completed = 0;
 364         union Vmxnet3_GenericDesc *gdesc;
 365
 366         gdesc = tq->comp_ring.base + tq->comp_ring.next2proc;
 367         while (VMXNET3_TCD_GET_GEN(&gdesc->tcd) == tq->comp_ring.gen) {
 368                 completed += vmxnet3_unmap_pkt(VMXNET3_TCD_GET_TXIDX(
 369                                                &gdesc->tcd), tq, adapter->pdev,
 370                                                adapter);
 371
 372                 vmxnet3_comp_ring_adv_next2proc(&tq->comp_ring);
 373                 gdesc = tq->comp_ring.base + tq->comp_ring.next2proc;
 374         }
 375
 376         if (completed) {
 377                 spin_lock(&tq->tx_lock);
 378                 if (unlikely(vmxnet3_tq_stopped(tq, adapter) &&
 379                              vmxnet3_cmd_ring_desc_avail(&tq->tx_ring) >
 380                              VMXNET3_WAKE_QUEUE_THRESHOLD(tq) &&
 381                              netif_carrier_ok(adapter->netdev))) {
 382                         vmxnet3_tq_wake(tq, adapter);
 383                 }
 384                 spin_unlock(&tq->tx_lock);
 385         }
 386         return completed;
 387 }
 388
 389
 390 static void
 391 vmxnet3_tq_cleanup(struct vmxnet3_tx_queue *tq,
 392                    struct vmxnet3_adapter *adapter)
 393 {
 394         int i;
 395
 396         while (tq->tx_ring.next2comp != tq->tx_ring.next2fill) {
 397                 struct vmxnet3_tx_buf_info *tbi;
 398                 union Vmxnet3_GenericDesc *gdesc;
 399
 400                 tbi = tq->buf_info + tq->tx_ring.next2comp;
 401                 gdesc = tq->tx_ring.base + tq->tx_ring.next2comp;
 402
 403                 vmxnet3_unmap_tx_buf(tbi, adapter->pdev);
 404                 if (tbi->skb) {
 405                         dev_kfree_skb_any(tbi->skb);
 406                         tbi->skb = NULL;
 407                 }
 408                 vmxnet3_cmd_ring_adv_next2comp(&tq->tx_ring);
 409         }
 410
 411         /* sanity check, verify all buffers are indeed unmapped and freed */
 412         for (i = 0; i < tq->tx_ring.size; i++) {
 413                 BUG_ON(tq->buf_info[i].skb != NULL ||
 414                        tq->buf_info[i].map_type != VMXNET3_MAP_NONE);
 415         }
 416
 417         tq->tx_ring.gen = VMXNET3_INIT_GEN;
 418         tq->tx_ring.next2fill = tq->tx_ring.next2comp = 0;
 419
 420         tq->comp_ring.gen = VMXNET3_INIT_GEN;
 421         tq->comp_ring.next2proc = 0;
 422 }
 423
 424
 425 static void
 426 vmxnet3_tq_destroy(struct vmxnet3_tx_queue *tq,
 427                    struct vmxnet3_adapter *adapter)
 428 {
 429         if (tq->tx_ring.base) {
 430                 pci_free_consistent(adapter->pdev, tq->tx_ring.size *
 431                                     sizeof(struct Vmxnet3_TxDesc),
 432                                     tq->tx_ring.base, tq->tx_ring.basePA);
 433                 tq->tx_ring.base = NULL;
 434         }
 435         if (tq->data_ring.base) {
 436                 pci_free_consistent(adapter->pdev, tq->data_ring.size *
 437                                     sizeof(struct Vmxnet3_TxDataDesc),
 438                                     tq->data_ring.base, tq->data_ring.basePA);
 439                 tq->data_ring.base = NULL;
 440         }
 441         if (tq->comp_ring.base) {
 442                 pci_free_consistent(adapter->pdev, tq->comp_ring.size *
 443                                     sizeof(struct Vmxnet3_TxCompDesc),
 444                                     tq->comp_ring.base, tq->comp_ring.basePA);
 445                 tq->comp_ring.base = NULL;
 446         }
 447         kfree(tq->buf_info);
 448         tq->buf_info = NULL;
 449 }
 450
 451
 452 /* Destroy all tx queues */
 453 void
 454 vmxnet3_tq_destroy_all(struct vmxnet3_adapter *adapter)
 455 {
 456         int i;
 457
 458         for (i = 0; i < adapter->num_tx_queues; i++)
 459                 vmxnet3_tq_destroy(&adapter->tx_queue[i], adapter);
 460 }
 461
 462
 463 static void
 464 vmxnet3_tq_init(struct vmxnet3_tx_queue *tq,
 465                 struct vmxnet3_adapter *adapter)
 466 {
 467         int i;
 468
 469         /* reset the tx ring contents to 0 and reset the tx ring states */
 470         memset(tq->tx_ring.base, 0, tq->tx_ring.size *
 471                sizeof(struct Vmxnet3_TxDesc));
 472         tq->tx_ring.next2fill = tq->tx_ring.next2comp = 0;
 473         tq->tx_ring.gen = VMXNET3_INIT_GEN;
 474
 475         memset(tq->data_ring.base, 0, tq->data_ring.size *
 476                sizeof(struct Vmxnet3_TxDataDesc));
 477
 478         /* reset the tx comp ring contents to 0 and reset comp ring states */
 479         memset(tq->comp_ring.base, 0, tq->comp_ring.size *
 480                sizeof(struct Vmxnet3_TxCompDesc));
 481         tq->comp_ring.next2proc = 0;
 482         tq->comp_ring.gen = VMXNET3_INIT_GEN;
 483
 484         /* reset the bookkeeping data */
 485         memset(tq->buf_info, 0, sizeof(tq->buf_info[0]) * tq->tx_ring.size);
 486         for (i = 0; i < tq->tx_ring.size; i++)
 487                 tq->buf_info[i].map_type = VMXNET3_MAP_NONE;
 488
 489         /* stats are not reset */
 490 }
 491
 492
 493 static int
 494 vmxnet3_tq_create(struct vmxnet3_tx_queue *tq,
 495                   struct vmxnet3_adapter *adapter)
 496 {
 497         BUG_ON(tq->tx_ring.base || tq->data_ring.base ||
 498                tq->comp_ring.base || tq->buf_info);
 499
 500         tq->tx_ring.base = pci_alloc_consistent(adapter->pdev, tq->tx_ring.size
 501                            * sizeof(struct Vmxnet3_TxDesc),
 502                            &tq->tx_ring.basePA);
 503         if (!tq->tx_ring.base) {
 504                 printk(KERN_ERR "%s: failed to allocate tx ring\n",
 505                        adapter->netdev->name);
 506                 goto err;
 507         }
 508
 509         tq->data_ring.base = pci_alloc_consistent(adapter->pdev,
 510                              tq->data_ring.size *
 511                              sizeof(struct Vmxnet3_TxDataDesc),
 512                              &tq->data_ring.basePA);
 513         if (!tq->data_ring.base) {
 514                 printk(KERN_ERR "%s: failed to allocate data ring\n",
 515                        adapter->netdev->name);
 516                 goto err;
 517         }
 518
 519         tq->comp_ring.base = pci_alloc_consistent(adapter->pdev,
 520                              tq->comp_ring.size *
 521                              sizeof(struct Vmxnet3_TxCompDesc),
 522                              &tq->comp_ring.basePA);
 523         if (!tq->comp_ring.base) {
 524                 printk(KERN_ERR "%s: failed to allocate tx comp ring\n",
 525                        adapter->netdev->name);
 526                 goto err;
 527         }
 528
 529         tq->buf_info = kcalloc(tq->tx_ring.size, sizeof(tq->buf_info[0]),
 530                                GFP_KERNEL);
 531         if (!tq->buf_info) {
 532                 printk(KERN_ERR "%s: failed to allocate tx bufinfo\n",
 533                        adapter->netdev->name);
 534                 goto err;
 535         }
 536
 537         return 0;
 538
 539 err:
 540         vmxnet3_tq_destroy(tq, adapter);
 541         return -ENOMEM;
 542 }
 543
 544 static void
 545 vmxnet3_tq_cleanup_all(struct vmxnet3_adapter *adapter)
 546 {
 547         int i;
 548
 549         for (i = 0; i < adapter->num_tx_queues; i++)
 550                 vmxnet3_tq_cleanup(&adapter->tx_queue[i], adapter);
 551 }
 552
 553 /*
 554  *    starting from ring->next2fill, allocate rx buffers for the given ring
 555  *    of the rx queue and update the rx desc. stop after @num_to_alloc buffers
 556  *    are allocated or allocation fails
 557  */
 558
 559 static int
 560 vmxnet3_rq_alloc_rx_buf(struct vmxnet3_rx_queue *rq, u32 ring_idx,
 561                         int num_to_alloc, struct vmxnet3_adapter *adapter)
 562 {
 563         int num_allocated = 0;
 564         struct vmxnet3_rx_buf_info *rbi_base = rq->buf_info[ring_idx];
 565         struct vmxnet3_cmd_ring *ring = &rq->rx_ring[ring_idx];
 566         u32 val;
 567
 568         while (num_allocated < num_to_alloc) {
 569                 struct vmxnet3_rx_buf_info *rbi;
 570                 union Vmxnet3_GenericDesc *gd;
 571
 572                 rbi = rbi_base + ring->next2fill;
 573                 gd = ring->base + ring->next2fill;
 574
 575                 if (rbi->buf_type == VMXNET3_RX_BUF_SKB) {
 576                         if (rbi->skb == NULL) {
 577                                 rbi->skb = dev_alloc_skb(rbi->len +
 578                                                          NET_IP_ALIGN);
 579                                 if (unlikely(rbi->skb == NULL)) {
 580                                         rq->stats.rx_buf_alloc_failure++;
 581                                         break;
 582                                 }
 583                                 rbi->skb->dev = adapter->netdev;
 584
 585                                 skb_reserve(rbi->skb, NET_IP_ALIGN);
 586                                 rbi->dma_addr = pci_map_single(adapter->pdev,
 587                                                 rbi->skb->data, rbi->len,
 588                                                 PCI_DMA_FROMDEVICE);
 589                         } else {
 590                                 /* rx buffer skipped by the device */
 591                         }
 592                         val = VMXNET3_RXD_BTYPE_HEAD << VMXNET3_RXD_BTYPE_SHIFT;
 593                 } else {
 594                         BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_PAGE ||
 595                                rbi->len  != PAGE_SIZE);
 596
 597                         if (rbi->page == NULL) {
 598                                 rbi->page = alloc_page(GFP_ATOMIC);
 599                                 if (unlikely(rbi->page == NULL)) {
 600                                         rq->stats.rx_buf_alloc_failure++;
 601                                         break;
 602                                 }
 603                                 rbi->dma_addr = pci_map_page(adapter->pdev,
 604                                                 rbi->page, 0, PAGE_SIZE,
 605                                                 PCI_DMA_FROMDEVICE);
 606                         } else {
 607                                 /* rx buffers skipped by the device */
 608                         }
 609                         val = VMXNET3_RXD_BTYPE_BODY << VMXNET3_RXD_BTYPE_SHIFT;
 610                 }
 611
 612                 BUG_ON(rbi->dma_addr == 0);
 613                 gd->rxd.addr = cpu_to_le64(rbi->dma_addr);
 614                 gd->dword[2] = cpu_to_le32((ring->gen << VMXNET3_RXD_GEN_SHIFT)
 615                                            | val | rbi->len);
 616
 617                 num_allocated++;
 618                 vmxnet3_cmd_ring_adv_next2fill(ring);
 619         }
 620         rq->uncommitted[ring_idx] += num_allocated;
 621
 622         dev_dbg(&adapter->netdev->dev,
 623                 "alloc_rx_buf: %d allocated, next2fill %u, next2comp "
 624                 "%u, uncommited %u\n", num_allocated, ring->next2fill,
 625                 ring->next2comp, rq->uncommitted[ring_idx]);
 626
 627         /* so that the device can distinguish a full ring and an empty ring */
 628         BUG_ON(num_allocated != 0 && ring->next2fill == ring->next2comp);
 629
 630         return num_allocated;
 631 }
 632
 633
 634 static void
 635 vmxnet3_append_frag(struct sk_buff *skb, struct Vmxnet3_RxCompDesc *rcd,
 636                     struct vmxnet3_rx_buf_info *rbi)
 637 {
 638         struct skb_frag_struct *frag = skb_shinfo(skb)->frags +
 639                 skb_shinfo(skb)->nr_frags;
 640
 641         BUG_ON(skb_shinfo(skb)->nr_frags >= MAX_SKB_FRAGS);
 642
 643         frag->page = rbi->page;
 644         frag->page_offset = 0;
 645         frag->size = rcd->len;
 646         skb->data_len += frag->size;
 647         skb_shinfo(skb)->nr_frags++;
 648 }
 649
 650
 651 static void
 652 vmxnet3_map_pkt(struct sk_buff *skb, struct vmxnet3_tx_ctx *ctx,
 653                 struct vmxnet3_tx_queue *tq, struct pci_dev *pdev,
 654                 struct vmxnet3_adapter *adapter)
 655 {
 656         u32 dw2, len;
 657         unsigned long buf_offset;
 658         int i;
 659         union Vmxnet3_GenericDesc *gdesc;
 660         struct vmxnet3_tx_buf_info *tbi = NULL;
 661
 662         BUG_ON(ctx->copy_size > skb_headlen(skb));
 663
 664         /* use the previous gen bit for the SOP desc */
 665         dw2 = (tq->tx_ring.gen ^ 0x1) << VMXNET3_TXD_GEN_SHIFT;
 666
 667         ctx->sop_txd = tq->tx_ring.base + tq->tx_ring.next2fill;
 668         gdesc = ctx->sop_txd; /* both loops below can be skipped */
 669
 670         /* no need to map the buffer if headers are copied */
 671         if (ctx->copy_size) {
 672                 ctx->sop_txd->txd.addr = cpu_to_le64(tq->data_ring.basePA +
 673                                         tq->tx_ring.next2fill *
 674                                         sizeof(struct Vmxnet3_TxDataDesc));
 675                 ctx->sop_txd->dword[2] = cpu_to_le32(dw2 | ctx->copy_size);
 676                 ctx->sop_txd->dword[3] = 0;
 677
 678                 tbi = tq->buf_info + tq->tx_ring.next2fill;
 679                 tbi->map_type = VMXNET3_MAP_NONE;
 680
 681                 dev_dbg(&adapter->netdev->dev,
 682                         "txd[%u]: 0x%Lx 0x%x 0x%x\n",
 683                         tq->tx_ring.next2fill,
 684                         le64_to_cpu(ctx->sop_txd->txd.addr),
 685                         ctx->sop_txd->dword[2], ctx->sop_txd->dword[3]);
 686                 vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring);
 687
 688                 /* use the right gen for non-SOP desc */
 689                 dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT;
 690         }
 691
 692         /* linear part can use multiple tx desc if it's big */
 693         len = skb_headlen(skb) - ctx->copy_size;
 694         buf_offset = ctx->copy_size;
 695         while (len) {
 696                 u32 buf_size;
 697
 698                 if (len < VMXNET3_MAX_TX_BUF_SIZE) {
 699                         buf_size = len;
 700                         dw2 |= len;
 701                 } else {
 702                         buf_size = VMXNET3_MAX_TX_BUF_SIZE;
 703                         /* spec says that for TxDesc.len, 0 == 2^14 */
 704                 }
 705
 706                 tbi = tq->buf_info + tq->tx_ring.next2fill;
 707                 tbi->map_type = VMXNET3_MAP_SINGLE;
 708                 tbi->dma_addr = pci_map_single(adapter->pdev,
 709                                 skb->data + buf_offset, buf_size,
 710                                 PCI_DMA_TODEVICE);
 711
 712                 tbi->len = buf_size;
 713
 714                 gdesc = tq->tx_ring.base + tq->tx_ring.next2fill;
 715                 BUG_ON(gdesc->txd.gen == tq->tx_ring.gen);
 716
 717                 gdesc->txd.addr = cpu_to_le64(tbi->dma_addr);
 718                 gdesc->dword[2] = cpu_to_le32(dw2);
 719                 gdesc->dword[3] = 0;
 720
 721                 dev_dbg(&adapter->netdev->dev,
 722                         "txd[%u]: 0x%Lx 0x%x 0x%x\n",
 723                         tq->tx_ring.next2fill, le64_to_cpu(gdesc->txd.addr),
 724                         le32_to_cpu(gdesc->dword[2]), gdesc->dword[3]);
 725                 vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring);
 726                 dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT;
 727
 728                 len -= buf_size;
 729                 buf_offset += buf_size;
 730         }
 731
 732         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
 733                 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i];
 734
 735                 tbi = tq->buf_info + tq->tx_ring.next2fill;
 736                 tbi->map_type = VMXNET3_MAP_PAGE;
 737                 tbi->dma_addr = pci_map_page(adapter->pdev, frag->page,
 738                                              frag->page_offset, frag->size,
 739                                              PCI_DMA_TODEVICE);
 740
 741                 tbi->len = frag->size;
 742
 743                 gdesc = tq->tx_ring.base + tq->tx_ring.next2fill;
 744                 BUG_ON(gdesc->txd.gen == tq->tx_ring.gen);
 745
 746                 gdesc->txd.addr = cpu_to_le64(tbi->dma_addr);
 747                 gdesc->dword[2] = cpu_to_le32(dw2 | frag->size);
 748                 gdesc->dword[3] = 0;
 749
 750                 dev_dbg(&adapter->netdev->dev,
 751                         "txd[%u]: 0x%llu %u %u\n",
 752                         tq->tx_ring.next2fill, le64_to_cpu(gdesc->txd.addr),
 753                         le32_to_cpu(gdesc->dword[2]), gdesc->dword[3]);
 754                 vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring);
 755                 dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT;
 756         }
 757
 758         ctx->eop_txd = gdesc;
 759
 760         /* set the last buf_info for the pkt */
 761         tbi->skb = skb;
 762         tbi->sop_idx = ctx->sop_txd - tq->tx_ring.base;
 763 }
 764
 765
 766 /* Init all tx queues */
 767 static void
 768 vmxnet3_tq_init_all(struct vmxnet3_adapter *adapter)
 769 {
 770         int i;
 771
 772         for (i = 0; i < adapter->num_tx_queues; i++)
 773                 vmxnet3_tq_init(&adapter->tx_queue[i], adapter);
 774 }
 775
 776
 777 /*
 778  *    parse and copy relevant protocol headers:
 779  *      For a tso pkt, relevant headers are L2/3/4 including options
 780  *      For a pkt requesting csum offloading, they are L2/3 and may include L4
 781  *      if it's a TCP/UDP pkt
 782  *
 783  * Returns:
 784  *    -1:  error happens during parsing
 785  *     0:  protocol headers parsed, but too big to be copied
 786  *     1:  protocol headers parsed and copied
 787  *
 788  * Other effects:
 789  *    1. related *ctx fields are updated.
 790  *    2. ctx->copy_size is # of bytes copied
 791  *    3. the portion copied is guaranteed to be in the linear part
 792  *
 793  */
 794 static int
 795 vmxnet3_parse_and_copy_hdr(struct sk_buff *skb, struct vmxnet3_tx_queue *tq,
 796                            struct vmxnet3_tx_ctx *ctx,
 797                            struct vmxnet3_adapter *adapter)
 798 {
 799         struct Vmxnet3_TxDataDesc *tdd;
 800
 801         if (ctx->mss) { /* TSO */
 802                 ctx->eth_ip_hdr_size = skb_transport_offset(skb);
 803                 ctx->l4_hdr_size = ((struct tcphdr *)
 804                                    skb_transport_header(skb))->doff * 4;
 805                 ctx->copy_size = ctx->eth_ip_hdr_size + ctx->l4_hdr_size;
 806         } else {
 807                 unsigned int pull_size;
 808
 809                 if (skb->ip_summed == CHECKSUM_PARTIAL) {
 810                         ctx->eth_ip_hdr_size = skb_checksum_start_offset(skb);
 811
 812                         if (ctx->ipv4) {
 813                                 struct iphdr *iph = (struct iphdr *)
 814                                                     skb_network_header(skb);
 815                                 if (iph->protocol == IPPROTO_TCP) {
 816                                         pull_size = ctx->eth_ip_hdr_size +
 817                                                     sizeof(struct tcphdr);
 818
 819                                         if (unlikely(!pskb_may_pull(skb,
 820                                                                 pull_size))) {
 821                                                 goto err;
 822                                         }
 823                                         ctx->l4_hdr_size = ((struct tcphdr *)
 824                                            skb_transport_header(skb))->doff * 4;
 825                                 } else if (iph->protocol == IPPROTO_UDP) {
 826                                         ctx->l4_hdr_size =
 827                                                         sizeof(struct udphdr);
 828                                 } else {
 829                                         ctx->l4_hdr_size = 0;
 830                                 }
 831                         } else {
 832                                 /* for simplicity, don't copy L4 headers */
 833                                 ctx->l4_hdr_size = 0;
 834                         }
 835                         ctx->copy_size = ctx->eth_ip_hdr_size +
 836                                          ctx->l4_hdr_size;
 837                 } else {
 838                         ctx->eth_ip_hdr_size = 0;
 839                         ctx->l4_hdr_size = 0;
 840                         /* copy as much as allowed */
 841                         ctx->copy_size = min((unsigned int)VMXNET3_HDR_COPY_SIZE
 842                                              , skb_headlen(skb));
 843                 }
 844
 845                 /* make sure headers are accessible directly */
 846                 if (unlikely(!pskb_may_pull(skb, ctx->copy_size)))
 847                         goto err;
 848         }
 849
 850         if (unlikely(ctx->copy_size > VMXNET3_HDR_COPY_SIZE)) {
 851                 tq->stats.oversized_hdr++;
 852                 ctx->copy_size = 0;
 853                 return 0;
 854         }
 855
 856         tdd = tq->data_ring.base + tq->tx_ring.next2fill;
 857
 858         memcpy(tdd->data, skb->data, ctx->copy_size);
 859         dev_dbg(&adapter->netdev->dev,
 860                 "copy %u bytes to dataRing[%u]\n",
 861                 ctx->copy_size, tq->tx_ring.next2fill);
 862         return 1;
 863
 864 err:
 865         return -1;
 866 }
 867
 868
 869 static void
 870 vmxnet3_prepare_tso(struct sk_buff *skb,
 871                     struct vmxnet3_tx_ctx *ctx)
 872 {
 873         struct tcphdr *tcph = (struct tcphdr *)skb_transport_header(skb);
 874         if (ctx->ipv4) {
 875                 struct iphdr *iph = (struct iphdr *)skb_network_header(skb);
 876                 iph->check = 0;
 877                 tcph->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr, 0,
 878                                                  IPPROTO_TCP, 0);
 879         } else {
 880                 struct ipv6hdr *iph = (struct ipv6hdr *)skb_network_header(skb);
 881                 tcph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, 0,
 882                                                IPPROTO_TCP, 0);
 883         }
 884 }
 885
 886
 887 /*
 888  * Transmits a pkt thru a given tq
 889  * Returns:
 890  *    NETDEV_TX_OK:      descriptors are setup successfully
 891  *    NETDEV_TX_OK:      error occured, the pkt is dropped
 892  *    NETDEV_TX_BUSY:    tx ring is full, queue is stopped
 893  *
 894  * Side-effects:
 895  *    1. tx ring may be changed
 896  *    2. tq stats may be updated accordingly
 897  *    3. shared->txNumDeferred may be updated
 898  */
 899
 900 static int
 901 vmxnet3_tq_xmit(struct sk_buff *skb, struct vmxnet3_tx_queue *tq,
 902                 struct vmxnet3_adapter *adapter, struct net_device *netdev)
 903 {
 904         int ret;
 905         u32 count;
 906         unsigned long flags;
 907         struct vmxnet3_tx_ctx ctx;
 908         union Vmxnet3_GenericDesc *gdesc;
 909 #ifdef __BIG_ENDIAN_BITFIELD
 910         /* Use temporary descriptor to avoid touching bits multiple times */
 911         union Vmxnet3_GenericDesc tempTxDesc;
 912 #endif
 913
 914         /* conservatively estimate # of descriptors to use */
 915         count = VMXNET3_TXD_NEEDED(skb_headlen(skb)) +
 916                 skb_shinfo(skb)->nr_frags + 1;
 917
 918         ctx.ipv4 = (skb->protocol == cpu_to_be16(ETH_P_IP));
 919
 920         ctx.mss = skb_shinfo(skb)->gso_size;
 921         if (ctx.mss) {
 922                 if (skb_header_cloned(skb)) {
 923                         if (unlikely(pskb_expand_head(skb, 0, 0,
 924                                                       GFP_ATOMIC) != 0)) {
 925                                 tq->stats.drop_tso++;
 926                                 goto drop_pkt;
 927                         }
 928                         tq->stats.copy_skb_header++;
 929                 }
 930                 vmxnet3_prepare_tso(skb, &ctx);
 931         } else {
 932                 if (unlikely(count > VMXNET3_MAX_TXD_PER_PKT)) {
 933
 934                         /* non-tso pkts must not use more than
 935                          * VMXNET3_MAX_TXD_PER_PKT entries
 936                          */
 937                         if (skb_linearize(skb) != 0) {
 938                                 tq->stats.drop_too_many_frags++;
 939                                 goto drop_pkt;
 940                         }
 941                         tq->stats.linearized++;
 942
 943                         /* recalculate the # of descriptors to use */
 944                         count = VMXNET3_TXD_NEEDED(skb_headlen(skb)) + 1;
 945                 }
 946         }
 947
 948         spin_lock_irqsave(&tq->tx_lock, flags);
 949
 950         if (count > vmxnet3_cmd_ring_desc_avail(&tq->tx_ring)) {
 951                 tq->stats.tx_ring_full++;
 952                 dev_dbg(&adapter->netdev->dev,
 953                         "tx queue stopped on %s, next2comp %u"
 954                         " next2fill %u\n", adapter->netdev->name,
 955                         tq->tx_ring.next2comp, tq->tx_ring.next2fill);
 956
 957                 vmxnet3_tq_stop(tq, adapter);
 958                 spin_unlock_irqrestore(&tq->tx_lock, flags);
 959                 return NETDEV_TX_BUSY;
 960         }
 961
 962
 963         ret = vmxnet3_parse_and_copy_hdr(skb, tq, &ctx, adapter);
 964         if (ret >= 0) {
 965                 BUG_ON(ret <= 0 && ctx.copy_size != 0);
 966                 /* hdrs parsed, check against other limits */
 967                 if (ctx.mss) {
 968                         if (unlikely(ctx.eth_ip_hdr_size + ctx.l4_hdr_size >
 969                                      VMXNET3_MAX_TX_BUF_SIZE)) {
 970                                 goto hdr_too_big;
 971                         }
 972                 } else {
 973                         if (skb->ip_summed == CHECKSUM_PARTIAL) {
 974                                 if (unlikely(ctx.eth_ip_hdr_size +
 975                                              skb->csum_offset >
 976                                              VMXNET3_MAX_CSUM_OFFSET)) {
 977                                         goto hdr_too_big;
 978                                 }
 979                         }
 980                 }
 981         } else {
 982                 tq->stats.drop_hdr_inspect_err++;
 983                 goto unlock_drop_pkt;
 984         }
 985
 986         /* fill tx descs related to addr & len */
 987         vmxnet3_map_pkt(skb, &ctx, tq, adapter->pdev, adapter);
 988
 989         /* setup the EOP desc */
 990         ctx.eop_txd->dword[3] = cpu_to_le32(VMXNET3_TXD_CQ | VMXNET3_TXD_EOP);
 991
 992         /* setup the SOP desc */
 993 #ifdef __BIG_ENDIAN_BITFIELD
 994         gdesc = &tempTxDesc;
 995         gdesc->dword[2] = ctx.sop_txd->dword[2];
 996         gdesc->dword[3] = ctx.sop_txd->dword[3];
 997 #else
 998         gdesc = ctx.sop_txd;
 999 #endif
1000         if (ctx.mss) {
1001                 gdesc->txd.hlen = ctx.eth_ip_hdr_size + ctx.l4_hdr_size;
1002                 gdesc->txd.om = VMXNET3_OM_TSO;
1003                 gdesc->txd.msscof = ctx.mss;
1004                 le32_add_cpu(&tq->shared->txNumDeferred, (skb->len -
1005                              gdesc->txd.hlen + ctx.mss - 1) / ctx.mss);
1006         } else {
1007                 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1008                         gdesc->txd.hlen = ctx.eth_ip_hdr_size;
1009                         gdesc->txd.om = VMXNET3_OM_CSUM;
1010                         gdesc->txd.msscof = ctx.eth_ip_hdr_size +
1011                                             skb->csum_offset;
1012                 } else {
1013                         gdesc->txd.om = 0;
1014                         gdesc->txd.msscof = 0;
1015                 }
1016                 le32_add_cpu(&tq->shared->txNumDeferred, 1);
1017         }
1018
1019         if (vlan_tx_tag_present(skb)) {
1020                 gdesc->txd.ti = 1;
1021                 gdesc->txd.tci = vlan_tx_tag_get(skb);
1022         }
1023
1024         /* finally flips the GEN bit of the SOP desc. */
1025         gdesc->dword[2] = cpu_to_le32(le32_to_cpu(gdesc->dword[2]) ^
1026                                                   VMXNET3_TXD_GEN);
1027 #ifdef __BIG_ENDIAN_BITFIELD
1028         /* Finished updating in bitfields of Tx Desc, so write them in original
1029          * place.
1030          */
1031         vmxnet3_TxDescToLe((struct Vmxnet3_TxDesc *)gdesc,
1032                            (struct Vmxnet3_TxDesc *)ctx.sop_txd);
1033         gdesc = ctx.sop_txd;
1034 #endif
1035         dev_dbg(&adapter->netdev->dev,
1036                 "txd[%u]: SOP 0x%Lx 0x%x 0x%x\n",
1037                 (u32)((union Vmxnet3_GenericDesc *)ctx.sop_txd -
1038                 tq->tx_ring.base), le64_to_cpu(gdesc->txd.addr),
1039                 le32_to_cpu(gdesc->dword[2]), le32_to_cpu(gdesc->dword[3]));
1040
1041         spin_unlock_irqrestore(&tq->tx_lock, flags);
1042
1043         if (le32_to_cpu(tq->shared->txNumDeferred) >=
1044                                         le32_to_cpu(tq->shared->txThreshold)) {
1045                 tq->shared->txNumDeferred = 0;
1046                 VMXNET3_WRITE_BAR0_REG(adapter,
1047                                        VMXNET3_REG_TXPROD + tq->qid * 8,
1048                                        tq->tx_ring.next2fill);
1049         }
1050
1051         return NETDEV_TX_OK;
1052
1053 hdr_too_big:
1054         tq->stats.drop_oversized_hdr++;
1055 unlock_drop_pkt:
1056         spin_unlock_irqrestore(&tq->tx_lock, flags);
1057 drop_pkt:
1058         tq->stats.drop_total++;
1059         dev_kfree_skb(skb);
1060         return NETDEV_TX_OK;
1061 }
1062
1063
1064 static netdev_tx_t
1065 vmxnet3_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1066 {
1067         struct vmxnet3_adapter *adapter = netdev_priv(netdev);
1068
1069                 BUG_ON(skb->queue_mapping > adapter->num_tx_queues);
1070                 return vmxnet3_tq_xmit(skb,
1071                                        &adapter->tx_queue[skb->queue_mapping],
1072                                        adapter, netdev);
1073 }
1074
1075
1076 static void
1077 vmxnet3_rx_csum(struct vmxnet3_adapter *adapter,
1078                 struct sk_buff *skb,
1079                 union Vmxnet3_GenericDesc *gdesc)
1080 {
1081         if (!gdesc->rcd.cnc && adapter->rxcsum) {
1082                 /* typical case: TCP/UDP over IP and both csums are correct */
1083                 if ((le32_to_cpu(gdesc->dword[3]) & VMXNET3_RCD_CSUM_OK) ==
1084                                                         VMXNET3_RCD_CSUM_OK) {
1085                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1086                         BUG_ON(!(gdesc->rcd.tcp || gdesc->rcd.udp));
1087                         BUG_ON(!(gdesc->rcd.v4  || gdesc->rcd.v6));
1088                         BUG_ON(gdesc->rcd.frg);
1089                 } else {
1090                         if (gdesc->rcd.csum) {
1091                                 skb->csum = htons(gdesc->rcd.csum);
1092                                 skb->ip_summed = CHECKSUM_PARTIAL;
1093                         } else {
1094                                 skb_checksum_none_assert(skb);
1095                         }
1096                 }
1097         } else {
1098                 skb_checksum_none_assert(skb);
1099         }
1100 }
1101
1102
1103 static void
1104 vmxnet3_rx_error(struct vmxnet3_rx_queue *rq, struct Vmxnet3_RxCompDesc *rcd,
1105                  struct vmxnet3_rx_ctx *ctx,  struct vmxnet3_adapter *adapter)
1106 {
1107         rq->stats.drop_err++;
1108         if (!rcd->fcs)
1109                 rq->stats.drop_fcs++;
1110
1111         rq->stats.drop_total++;
1112
1113         /*
1114          * We do not unmap and chain the rx buffer to the skb.
1115          * We basically pretend this buffer is not used and will be recycled
1116          * by vmxnet3_rq_alloc_rx_buf()
1117          */
1118
1119         /*
1120          * ctx->skb may be NULL if this is the first and the only one
1121          * desc for the pkt
1122          */
1123         if (ctx->skb)
1124                 dev_kfree_skb_irq(ctx->skb);
1125
1126         ctx->skb = NULL;
1127 }
1128
1129
1130 static int
1131 vmxnet3_rq_rx_complete(struct vmxnet3_rx_queue *rq,
1132                        struct vmxnet3_adapter *adapter, int quota)
1133 {
1134         static const u32 rxprod_reg[2] = {
1135                 VMXNET3_REG_RXPROD, VMXNET3_REG_RXPROD2
1136         };
1137         u32 num_rxd = 0;
1138         struct Vmxnet3_RxCompDesc *rcd;
1139         struct vmxnet3_rx_ctx *ctx = &rq->rx_ctx;
1140 #ifdef __BIG_ENDIAN_BITFIELD
1141         struct Vmxnet3_RxDesc rxCmdDesc;
1142         struct Vmxnet3_RxCompDesc rxComp;
1143 #endif
1144         vmxnet3_getRxComp(rcd, &rq->comp_ring.base[rq->comp_ring.next2proc].rcd,
1145                           &rxComp);
1146         while (rcd->gen == rq->comp_ring.gen) {
1147                 struct vmxnet3_rx_buf_info *rbi;
1148                 struct sk_buff *skb;
1149                 int num_to_alloc;
1150                 struct Vmxnet3_RxDesc *rxd;
1151                 u32 idx, ring_idx;
1152
1153                 if (num_rxd >= quota) {
1154                         /* we may stop even before we see the EOP desc of
1155                          * the current pkt
1156                          */
1157                         break;
1158                 }
1159                 num_rxd++;
1160                 BUG_ON(rcd->rqID != rq->qid && rcd->rqID != rq->qid2);
1161                 idx = rcd->rxdIdx;
1162                 ring_idx = rcd->rqID < adapter->num_rx_queues ? 0 : 1;
1163                 vmxnet3_getRxDesc(rxd, &rq->rx_ring[ring_idx].base[idx].rxd,
1164                                   &rxCmdDesc);
1165                 rbi = rq->buf_info[ring_idx] + idx;
1166
1167                 BUG_ON(rxd->addr != rbi->dma_addr ||
1168                        rxd->len != rbi->len);
1169
1170                 if (unlikely(rcd->eop && rcd->err)) {
1171                         vmxnet3_rx_error(rq, rcd, ctx, adapter);
1172                         goto rcd_done;
1173                 }
1174
1175                 if (rcd->sop) { /* first buf of the pkt */
1176                         BUG_ON(rxd->btype != VMXNET3_RXD_BTYPE_HEAD ||
1177                                rcd->rqID != rq->qid);
1178
1179                         BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_SKB);
1180                         BUG_ON(ctx->skb != NULL || rbi->skb == NULL);
1181
1182                         if (unlikely(rcd->len == 0)) {
1183                                 /* Pretend the rx buffer is skipped. */
1184                                 BUG_ON(!(rcd->sop && rcd->eop));
1185                                 dev_dbg(&adapter->netdev->dev,
1186                                         "rxRing[%u][%u] 0 length\n",
1187                                         ring_idx, idx);
1188                                 goto rcd_done;
1189                         }
1190
1191                         ctx->skb = rbi->skb;
1192                         rbi->skb = NULL;
1193
1194                         pci_unmap_single(adapter->pdev, rbi->dma_addr, rbi->len,
1195                                          PCI_DMA_FROMDEVICE);
1196
1197                         skb_put(ctx->skb, rcd->len);
1198                 } else {
1199                         BUG_ON(ctx->skb == NULL);
1200                         /* non SOP buffer must be type 1 in most cases */
1201                         if (rbi->buf_type == VMXNET3_RX_BUF_PAGE) {
1202                                 BUG_ON(rxd->btype != VMXNET3_RXD_BTYPE_BODY);
1203
1204                                 if (rcd->len) {
1205                                         pci_unmap_page(adapter->pdev,
1206                                                        rbi->dma_addr, rbi->len,
1207                                                        PCI_DMA_FROMDEVICE);
1208
1209                                         vmxnet3_append_frag(ctx->skb, rcd, rbi);
1210                                         rbi->page = NULL;
1211                                 }
1212                         } else {
1213                                 /*
1214                                  * The only time a non-SOP buffer is type 0 is
1215                                  * when it's EOP and error flag is raised, which
1216                                  * has already been handled.
1217                                  */
1218                                 BUG_ON(true);
1219                         }
1220                 }
1221
1222                 skb = ctx->skb;
1223                 if (rcd->eop) {
1224                         skb->len += skb->data_len;
1225                         skb->truesize += skb->data_len;
1226
1227                         vmxnet3_rx_csum(adapter, skb,
1228                                         (union Vmxnet3_GenericDesc *)rcd);
1229                         skb->protocol = eth_type_trans(skb, adapter->netdev);
1230
1231                         if (unlikely(adapter->vlan_grp && rcd->ts)) {
1232                                 vlan_hwaccel_receive_skb(skb,
1233                                                 adapter->vlan_grp, rcd->tci);
1234                         } else {
1235                                 netif_receive_skb(skb);
1236                         }
1237
1238                         ctx->skb = NULL;
1239                 }
1240
1241 rcd_done:
1242                 /* device may skip some rx descs */
1243                 rq->rx_ring[ring_idx].next2comp = idx;
1244                 VMXNET3_INC_RING_IDX_ONLY(rq->rx_ring[ring_idx].next2comp,
1245                                           rq->rx_ring[ring_idx].size);
1246
1247                 /* refill rx buffers frequently to avoid starving the h/w */
1248                 num_to_alloc = vmxnet3_cmd_ring_desc_avail(rq->rx_ring +
1249                                                            ring_idx);
1250                 if (unlikely(num_to_alloc > VMXNET3_RX_ALLOC_THRESHOLD(rq,
1251                                                         ring_idx, adapter))) {
1252                         vmxnet3_rq_alloc_rx_buf(rq, ring_idx, num_to_alloc,
1253                                                 adapter);
1254
1255                         /* if needed, update the register */
1256                         if (unlikely(rq->shared->updateRxProd)) {
1257                                 VMXNET3_WRITE_BAR0_REG(adapter,
1258                                         rxprod_reg[ring_idx] + rq->qid * 8,
1259                                         rq->rx_ring[ring_idx].next2fill);
1260                                 rq->uncommitted[ring_idx] = 0;
1261                         }
1262                 }
1263
1264                 vmxnet3_comp_ring_adv_next2proc(&rq->comp_ring);
1265                 vmxnet3_getRxComp(rcd,
1266                      &rq->comp_ring.base[rq->comp_ring.next2proc].rcd, &rxComp);
1267         }
1268
1269         return num_rxd;
1270 }
1271
1272
1273 static void
1274 vmxnet3_rq_cleanup(struct vmxnet3_rx_queue *rq,
1275                    struct vmxnet3_adapter *adapter)
1276 {
1277         u32 i, ring_idx;
1278         struct Vmxnet3_RxDesc *rxd;
1279
1280         for (ring_idx = 0; ring_idx < 2; ring_idx++) {
1281                 for (i = 0; i < rq->rx_ring[ring_idx].size; i++) {
1282 #ifdef __BIG_ENDIAN_BITFIELD
1283                         struct Vmxnet3_RxDesc rxDesc;
1284 #endif
1285                         vmxnet3_getRxDesc(rxd,
1286                                 &rq->rx_ring[ring_idx].base[i].rxd, &rxDesc);
1287
1288                         if (rxd->btype == VMXNET3_RXD_BTYPE_HEAD &&
1289                                         rq->buf_info[ring_idx][i].skb) {
1290                                 pci_unmap_single(adapter->pdev, rxd->addr,
1291                                                  rxd->len, PCI_DMA_FROMDEVICE);
1292                                 dev_kfree_skb(rq->buf_info[ring_idx][i].skb);
1293                                 rq->buf_info[ring_idx][i].skb = NULL;
1294                         } else if (rxd->btype == VMXNET3_RXD_BTYPE_BODY &&
1295                                         rq->buf_info[ring_idx][i].page) {
1296                                 pci_unmap_page(adapter->pdev, rxd->addr,
1297                                                rxd->len, PCI_DMA_FROMDEVICE);
1298                                 put_page(rq->buf_info[ring_idx][i].page);
1299                                 rq->buf_info[ring_idx][i].page = NULL;
1300                         }
1301                 }
1302
1303                 rq->rx_ring[ring_idx].gen = VMXNET3_INIT_GEN;
1304                 rq->rx_ring[ring_idx].next2fill =
1305                                         rq->rx_ring[ring_idx].next2comp = 0;
1306                 rq->uncommitted[ring_idx] = 0;
1307         }
1308
1309         rq->comp_ring.gen = VMXNET3_INIT_GEN;
1310         rq->comp_ring.next2proc = 0;
1311 }
1312
1313
1314 static void
1315 vmxnet3_rq_cleanup_all(struct vmxnet3_adapter *adapter)
1316 {
1317         int i;
1318
1319         for (i = 0; i < adapter->num_rx_queues; i++)
1320                 vmxnet3_rq_cleanup(&adapter->rx_queue[i], adapter);
1321 }
1322
1323
1324 void vmxnet3_rq_destroy(struct vmxnet3_rx_queue *rq,
1325                         struct vmxnet3_adapter *adapter)
1326 {
1327         int i;
1328         int j;
1329
1330         /* all rx buffers must have already been freed */
1331         for (i = 0; i < 2; i++) {
1332                 if (rq->buf_info[i]) {
1333                         for (j = 0; j < rq->rx_ring[i].size; j++)
1334                                 BUG_ON(rq->buf_info[i][j].page != NULL);
1335                 }
1336         }
1337
1338
1339         kfree(rq->buf_info[0]);
1340
1341         for (i = 0; i < 2; i++) {
1342                 if (rq->rx_ring[i].base) {
1343                         pci_free_consistent(adapter->pdev, rq->rx_ring[i].size
1344                                             * sizeof(struct Vmxnet3_RxDesc),
1345                                             rq->rx_ring[i].base,
1346                                             rq->rx_ring[i].basePA);
1347                         rq->rx_ring[i].base = NULL;
1348                 }
1349                 rq->buf_info[i] = NULL;
1350         }
1351
1352         if (rq->comp_ring.base) {
1353                 pci_free_consistent(adapter->pdev, rq->comp_ring.size *
1354                                     sizeof(struct Vmxnet3_RxCompDesc),
1355                                     rq->comp_ring.base, rq->comp_ring.basePA);
1356                 rq->comp_ring.base = NULL;
1357         }
1358 }
1359
1360
1361 static int
1362 vmxnet3_rq_init(struct vmxnet3_rx_queue *rq,
1363                 struct vmxnet3_adapter  *adapter)
1364 {
1365         int i;
1366
1367         /* initialize buf_info */
1368         for (i = 0; i < rq->rx_ring[0].size; i++) {
1369
1370                 /* 1st buf for a pkt is skbuff */
1371                 if (i % adapter->rx_buf_per_pkt == 0) {
1372                         rq->buf_info[0][i].buf_type = VMXNET3_RX_BUF_SKB;
1373                         rq->buf_info[0][i].len = adapter->skb_buf_size;
1374                 } else { /* subsequent bufs for a pkt is frag */
1375                         rq->buf_info[0][i].buf_type = VMXNET3_RX_BUF_PAGE;
1376                         rq->buf_info[0][i].len = PAGE_SIZE;
1377                 }
1378         }
1379         for (i = 0; i < rq->rx_ring[1].size; i++) {
1380                 rq->buf_info[1][i].buf_type = VMXNET3_RX_BUF_PAGE;
1381                 rq->buf_info[1][i].len = PAGE_SIZE;
1382         }
1383
1384         /* reset internal state and allocate buffers for both rings */
1385         for (i = 0; i < 2; i++) {
1386                 rq->rx_ring[i].next2fill = rq->rx_ring[i].next2comp = 0;
1387                 rq->uncommitted[i] = 0;
1388
1389                 memset(rq->rx_ring[i].base, 0, rq->rx_ring[i].size *
1390                        sizeof(struct Vmxnet3_RxDesc));
1391                 rq->rx_ring[i].gen = VMXNET3_INIT_GEN;
1392         }
1393         if (vmxnet3_rq_alloc_rx_buf(rq, 0, rq->rx_ring[0].size - 1,
1394                                     adapter) == 0) {
1395                 /* at least has 1 rx buffer for the 1st ring */
1396                 return -ENOMEM;
1397         }
1398         vmxnet3_rq_alloc_rx_buf(rq, 1, rq->rx_ring[1].size - 1, adapter);
1399
1400         /* reset the comp ring */
1401         rq->comp_ring.next2proc = 0;
1402         memset(rq->comp_ring.base, 0, rq->comp_ring.size *
1403                sizeof(struct Vmxnet3_RxCompDesc));
1404         rq->comp_ring.gen = VMXNET3_INIT_GEN;
1405
1406         /* reset rxctx */
1407         rq->rx_ctx.skb = NULL;
1408
1409         /* stats are not reset */
1410         return 0;
1411 }
1412
1413
1414 static int
1415 vmxnet3_rq_init_all(struct vmxnet3_adapter *adapter)
1416 {
1417         int i, err = 0;
1418
1419         for (i = 0; i < adapter->num_rx_queues; i++) {
1420                 err = vmxnet3_rq_init(&adapter->rx_queue[i], adapter);
1421                 if (unlikely(err)) {
1422                         dev_err(&adapter->netdev->dev, "%s: failed to "
1423                                 "initialize rx queue%i\n",
1424                                 adapter->netdev->name, i);
1425                         break;
1426                 }
1427         }
1428         return err;
1429
1430 }
1431
1432
1433 static int
1434 vmxnet3_rq_create(struct vmxnet3_rx_queue *rq, struct vmxnet3_adapter *adapter)
1435 {
1436         int i;
1437         size_t sz;
1438         struct vmxnet3_rx_buf_info *bi;
1439
1440         for (i = 0; i < 2; i++) {
1441
1442                 sz = rq->rx_ring[i].size * sizeof(struct Vmxnet3_RxDesc);
1443                 rq->rx_ring[i].base = pci_alloc_consistent(adapter->pdev, sz,
1444                                                         &rq->rx_ring[i].basePA);
1445                 if (!rq->rx_ring[i].base) {
1446                         printk(KERN_ERR "%s: failed to allocate rx ring %d\n",
1447                                adapter->netdev->name, i);
1448                         goto err;
1449                 }
1450         }
1451
1452         sz = rq->comp_ring.size * sizeof(struct Vmxnet3_RxCompDesc);
1453         rq->comp_ring.base = pci_alloc_consistent(adapter->pdev, sz,
1454                                                   &rq->comp_ring.basePA);
1455         if (!rq->comp_ring.base) {
1456                 printk(KERN_ERR "%s: failed to allocate rx comp ring\n",
1457                        adapter->netdev->name);
1458                 goto err;
1459         }
1460
1461         sz = sizeof(struct vmxnet3_rx_buf_info) * (rq->rx_ring[0].size +
1462                                                    rq->rx_ring[1].size);
1463         bi = kzalloc(sz, GFP_KERNEL);
1464         if (!bi) {
1465                 printk(KERN_ERR "%s: failed to allocate rx bufinfo\n",
1466                        adapter->netdev->name);
1467                 goto err;
1468         }
1469         rq->buf_info[0] = bi;
1470         rq->buf_info[1] = bi + rq->rx_ring[0].size;
1471
1472         return 0;
1473
1474 err:
1475         vmxnet3_rq_destroy(rq, adapter);
1476         return -ENOMEM;
1477 }
1478
1479
1480 static int
1481 vmxnet3_rq_create_all(struct vmxnet3_adapter *adapter)
1482 {
1483         int i, err = 0;
1484
1485         for (i = 0; i < adapter->num_rx_queues; i++) {
1486                 err = vmxnet3_rq_create(&adapter->rx_queue[i], adapter);
1487                 if (unlikely(err)) {
1488                         dev_err(&adapter->netdev->dev,
1489                                 "%s: failed to create rx queue%i\n",
1490                                 adapter->netdev->name, i);
1491                         goto err_out;
1492                 }
1493         }
1494         return err;
1495 err_out:
1496         vmxnet3_rq_destroy_all(adapter);
1497         return err;
1498
1499 }
1500
1501 /* Multiple queue aware polling function for tx and rx */
1502
1503 static int
1504 vmxnet3_do_poll(struct vmxnet3_adapter *adapter, int budget)
1505 {
1506         int rcd_done = 0, i;
1507         if (unlikely(adapter->shared->ecr))
1508                 vmxnet3_process_events(adapter);
1509         for (i = 0; i < adapter->num_tx_queues; i++)
1510                 vmxnet3_tq_tx_complete(&adapter->tx_queue[i], adapter);
1511
1512         for (i = 0; i < adapter->num_rx_queues; i++)
1513                 rcd_done += vmxnet3_rq_rx_complete(&adapter->rx_queue[i],
1514                                                    adapter, budget);
1515         return rcd_done;
1516 }
1517
1518
1519 static int
1520 vmxnet3_poll(struct napi_struct *napi, int budget)
1521 {
1522         struct vmxnet3_rx_queue *rx_queue = container_of(napi,
1523                                           struct vmxnet3_rx_queue, napi);
1524         int rxd_done;
1525
1526         rxd_done = vmxnet3_do_poll(rx_queue->adapter, budget);
1527
1528         if (rxd_done < budget) {
1529                 napi_complete(napi);
1530                 vmxnet3_enable_all_intrs(rx_queue->adapter);
1531         }
1532         return rxd_done;
1533 }
1534
1535 /*
1536  * NAPI polling function for MSI-X mode with multiple Rx queues
1537  * Returns the # of the NAPI credit consumed (# of rx descriptors processed)
1538  */
1539
1540 static int
1541 vmxnet3_poll_rx_only(struct napi_struct *napi, int budget)
1542 {
1543         struct vmxnet3_rx_queue *rq = container_of(napi,
1544                                                 struct vmxnet3_rx_queue, napi);
1545         struct vmxnet3_adapter *adapter = rq->adapter;
1546         int rxd_done;
1547
1548         /* When sharing interrupt with corresponding tx queue, process
1549          * tx completions in that queue as well
1550          */
1551         if (adapter->share_intr == VMXNET3_INTR_BUDDYSHARE) {
1552                 struct vmxnet3_tx_queue *tq =
1553                                 &adapter->tx_queue[rq - adapter->rx_queue];
1554                 vmxnet3_tq_tx_complete(tq, adapter);
1555         }
1556
1557         rxd_done = vmxnet3_rq_rx_complete(rq, adapter, budget);
1558
1559         if (rxd_done < budget) {
1560                 napi_complete(napi);
1561                 vmxnet3_enable_intr(adapter, rq->comp_ring.intr_idx);
1562         }
1563         return rxd_done;
1564 }
1565
1566
1567 #ifdef CONFIG_PCI_MSI
1568
1569 /*
1570  * Handle completion interrupts on tx queues
1571  * Returns whether or not the intr is handled
1572  */
1573
1574 static irqreturn_t
1575 vmxnet3_msix_tx(int irq, void *data)
1576 {
1577         struct vmxnet3_tx_queue *tq = data;
1578         struct vmxnet3_adapter *adapter = tq->adapter;
1579
1580         if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
1581                 vmxnet3_disable_intr(adapter, tq->comp_ring.intr_idx);
1582
1583         /* Handle the case where only one irq is allocate for all tx queues */
1584         if (adapter->share_intr == VMXNET3_INTR_TXSHARE) {
1585                 int i;
1586                 for (i = 0; i < adapter->num_tx_queues; i++) {
1587                         struct vmxnet3_tx_queue *txq = &adapter->tx_queue[i];
1588                         vmxnet3_tq_tx_complete(txq, adapter);
1589                 }
1590         } else {
1591                 vmxnet3_tq_tx_complete(tq, adapter);
1592         }
1593         vmxnet3_enable_intr(adapter, tq->comp_ring.intr_idx);
1594
1595         return IRQ_HANDLED;
1596 }
1597
1598
1599 /*
1600  * Handle completion interrupts on rx queues. Returns whether or not the
1601  * intr is handled
1602  */
1603
1604 static irqreturn_t
1605 vmxnet3_msix_rx(int irq, void *data)
1606 {
1607         struct vmxnet3_rx_queue *rq = data;
1608         struct vmxnet3_adapter *adapter = rq->adapter;
1609
1610         /* disable intr if needed */
1611         if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
1612                 vmxnet3_disable_intr(adapter, rq->comp_ring.intr_idx);
1613         napi_schedule(&rq->napi);
1614
1615         return IRQ_HANDLED;
1616 }
1617
1618 /*
1619  *----------------------------------------------------------------------------
1620  *
1621  * vmxnet3_msix_event --
1622  *
1623  *    vmxnet3 msix event intr handler
1624  *
1625  * Result:
1626  *    whether or not the intr is handled
1627  *
1628  *----------------------------------------------------------------------------
1629  */
1630
1631 static irqreturn_t
1632 vmxnet3_msix_event(int irq, void *data)
1633 {
1634         struct net_device *dev = data;
1635         struct vmxnet3_adapter *adapter = netdev_priv(dev);
1636
1637         /* disable intr if needed */
1638         if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
1639                 vmxnet3_disable_intr(adapter, adapter->intr.event_intr_idx);
1640
1641         if (adapter->shared->ecr)
1642                 vmxnet3_process_events(adapter);
1643
1644         vmxnet3_enable_intr(adapter, adapter->intr.event_intr_idx);
1645
1646         return IRQ_HANDLED;
1647 }
1648
1649 #endif /* CONFIG_PCI_MSI  */
1650
1651
1652 /* Interrupt handler for vmxnet3  */
1653 static irqreturn_t
1654 vmxnet3_intr(int irq, void *dev_id)
1655 {
1656         struct net_device *dev = dev_id;
1657         struct vmxnet3_adapter *adapter = netdev_priv(dev);
1658
1659         if (adapter->intr.type == VMXNET3_IT_INTX) {
1660                 u32 icr = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_ICR);
1661                 if (unlikely(icr == 0))
1662                         /* not ours */
1663                         return IRQ_NONE;
1664         }
1665
1666
1667         /* disable intr if needed */
1668         if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
1669                 vmxnet3_disable_all_intrs(adapter);
1670
1671         napi_schedule(&adapter->rx_queue[0].napi);
1672
1673         return IRQ_HANDLED;
1674 }
1675
1676 #ifdef CONFIG_NET_POLL_CONTROLLER
1677
1678 /* netpoll callback. */
1679 static void
1680 vmxnet3_netpoll(struct net_device *netdev)
1681 {
1682         struct vmxnet3_adapter *adapter = netdev_priv(netdev);
1683
1684         if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
1685                 vmxnet3_disable_all_intrs(adapter);
1686
1687         vmxnet3_do_poll(adapter, adapter->rx_queue[0].rx_ring[0].size);
1688         vmxnet3_enable_all_intrs(adapter);
1689
1690 }
1691 #endif  /* CONFIG_NET_POLL_CONTROLLER */
1692
1693 static int
1694 vmxnet3_request_irqs(struct vmxnet3_adapter *adapter)
1695 {
1696         struct vmxnet3_intr *intr = &adapter->intr;
1697         int err = 0, i;
1698         int vector = 0;
1699
1700 #ifdef CONFIG_PCI_MSI
1701         if (adapter->intr.type == VMXNET3_IT_MSIX) {
1702                 for (i = 0; i < adapter->num_tx_queues; i++) {
1703                         if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE) {
1704                                 sprintf(adapter->tx_queue[i].name, "%s-tx-%d",
1705                                         adapter->netdev->name, vector);
1706                                 err = request_irq(
1707                                               intr->msix_entries[vector].vector,
1708                                               vmxnet3_msix_tx, 0,
1709                                               adapter->tx_queue[i].name,
1710                                               &adapter->tx_queue[i]);
1711                         } else {
1712                                 sprintf(adapter->tx_queue[i].name, "%s-rxtx-%d",
1713                                         adapter->netdev->name, vector);
1714                         }
1715                         if (err) {
1716                                 dev_err(&adapter->netdev->dev,
1717                                         "Failed to request irq for MSIX, %s, "
1718                                         "error %d\n",
1719                                         adapter->tx_queue[i].name, err);
1720                                 return err;
1721                         }
1722
1723                         /* Handle the case where only 1 MSIx was allocated for
1724                          * all tx queues */
1725                         if (adapter->share_intr == VMXNET3_INTR_TXSHARE) {
1726                                 for (; i < adapter->num_tx_queues; i++)
1727                                         adapter->tx_queue[i].comp_ring.intr_idx
1728                                                                 = vector;
1729                                 vector++;
1730                                 break;
1731                         } else {
1732                                 adapter->tx_queue[i].comp_ring.intr_idx
1733                                                                 = vector++;
1734                         }
1735                 }
1736                 if (adapter->share_intr == VMXNET3_INTR_BUDDYSHARE)
1737                         vector = 0;
1738
1739                 for (i = 0; i < adapter->num_rx_queues; i++) {
1740                         if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE)
1741                                 sprintf(adapter->rx_queue[i].name, "%s-rx-%d",
1742                                         adapter->netdev->name, vector);
1743                         else
1744                                 sprintf(adapter->rx_queue[i].name, "%s-rxtx-%d",
1745                                         adapter->netdev->name, vector);
1746                         err = request_irq(intr->msix_entries[vector].vector,
1747                                           vmxnet3_msix_rx, 0,
1748                                           adapter->rx_queue[i].name,
1749                                           &(adapter->rx_queue[i]));
1750                         if (err) {
1751                                 printk(KERN_ERR "Failed to request irq for MSIX"
1752                                        ", %s, error %d\n",
1753                                        adapter->rx_queue[i].name, err);
1754                                 return err;
1755                         }
1756
1757                         adapter->rx_queue[i].comp_ring.intr_idx = vector++;
1758                 }
1759
1760                 sprintf(intr->event_msi_vector_name, "%s-event-%d",
1761                         adapter->netdev->name, vector);
1762                 err = request_irq(intr->msix_entries[vector].vector,
1763                                   vmxnet3_msix_event, 0,
1764                                   intr->event_msi_vector_name, adapter->netdev);
1765                 intr->event_intr_idx = vector;
1766
1767         } else if (intr->type == VMXNET3_IT_MSI) {
1768                 adapter->num_rx_queues = 1;
1769                 err = request_irq(adapter->pdev->irq, vmxnet3_intr, 0,
1770                                   adapter->netdev->name, adapter->netdev);
1771         } else {
1772 #endif
1773                 adapter->num_rx_queues = 1;
1774                 err = request_irq(adapter->pdev->irq, vmxnet3_intr,
1775                                   IRQF_SHARED, adapter->netdev->name,
1776                                   adapter->netdev);
1777 #ifdef CONFIG_PCI_MSI
1778         }
1779 #endif
1780         intr->num_intrs = vector + 1;
1781         if (err) {
1782                 printk(KERN_ERR "Failed to request irq %s (intr type:%d), error"
1783                        ":%d\n", adapter->netdev->name, intr->type, err);
1784         } else {
1785                 /* Number of rx queues will not change after this */
1786                 for (i = 0; i < adapter->num_rx_queues; i++) {
1787                         struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i];
1788                         rq->qid = i;
1789                         rq->qid2 = i + adapter->num_rx_queues;
1790                 }
1791
1792
1793
1794                 /* init our intr settings */
1795                 for (i = 0; i < intr->num_intrs; i++)
1796                         intr->mod_levels[i] = UPT1_IML_ADAPTIVE;
1797                 if (adapter->intr.type != VMXNET3_IT_MSIX) {
1798                         adapter->intr.event_intr_idx = 0;
1799                         for (i = 0; i < adapter->num_tx_queues; i++)
1800                                 adapter->tx_queue[i].comp_ring.intr_idx = 0;
1801                         adapter->rx_queue[0].comp_ring.intr_idx = 0;
1802                 }
1803
1804                 printk(KERN_INFO "%s: intr type %u, mode %u, %u vectors "
1805                        "allocated\n", adapter->netdev->name, intr->type,
1806                        intr->mask_mode, intr->num_intrs);
1807         }
1808
1809         return err;
1810 }
1811
1812
1813 static void
1814 vmxnet3_free_irqs(struct vmxnet3_adapter *adapter)
1815 {
1816         struct vmxnet3_intr *intr = &adapter->intr;
1817         BUG_ON(intr->type == VMXNET3_IT_AUTO || intr->num_intrs <= 0);
1818
1819         switch (intr->type) {
1820 #ifdef CONFIG_PCI_MSI
1821         case VMXNET3_IT_MSIX:
1822         {
1823                 int i, vector = 0;
1824
1825                 if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE) {
1826                         for (i = 0; i < adapter->num_tx_queues; i++) {
1827                                 free_irq(intr->msix_entries[vector++].vector,
1828                                          &(adapter->tx_queue[i]));
1829                                 if (adapter->share_intr == VMXNET3_INTR_TXSHARE)
1830                                         break;
1831                         }
1832                 }
1833
1834                 for (i = 0; i < adapter->num_rx_queues; i++) {
1835                         free_irq(intr->msix_entries[vector++].vector,
1836                                  &(adapter->rx_queue[i]));
1837                 }
1838
1839                 free_irq(intr->msix_entries[vector].vector,
1840                          adapter->netdev);
1841                 BUG_ON(vector >= intr->num_intrs);
1842                 break;
1843         }
1844 #endif
1845         case VMXNET3_IT_MSI:
1846                 free_irq(adapter->pdev->irq, adapter->netdev);
1847                 break;
1848         case VMXNET3_IT_INTX:
1849                 free_irq(adapter->pdev->irq, adapter->netdev);
1850                 break;
1851         default:
1852                 BUG_ON(true);
1853         }
1854 }
1855
1856 static void
1857 vmxnet3_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
1858 {
1859         struct vmxnet3_adapter *adapter = netdev_priv(netdev);
1860         struct Vmxnet3_DriverShared *shared = adapter->shared;
1861         u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
1862
1863         if (grp) {
1864                 /* add vlan rx stripping. */
1865                 if (adapter->netdev->features & NETIF_F_HW_VLAN_RX) {
1866                         int i;
1867                         struct Vmxnet3_DSDevRead *devRead = &shared->devRead;
1868                         adapter->vlan_grp = grp;
1869
1870                         /* update FEATURES to device */
1871                         devRead->misc.uptFeatures |= UPT1_F_RXVLAN;
1872                         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
1873                                                VMXNET3_CMD_UPDATE_FEATURE);
1874                         /*
1875                          *  Clear entire vfTable; then enable untagged pkts.
1876                          *  Note: setting one entry in vfTable to non-zero turns
1877                          *  on VLAN rx filtering.
1878                          */
1879                         for (i = 0; i < VMXNET3_VFT_SIZE; i++)
1880                                 vfTable[i] = 0;
1881
1882                         VMXNET3_SET_VFTABLE_ENTRY(vfTable, 0);
1883                         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
1884                                                VMXNET3_CMD_UPDATE_VLAN_FILTERS);
1885                 } else {
1886                         printk(KERN_ERR "%s: vlan_rx_register when device has "
1887                                "no NETIF_F_HW_VLAN_RX\n", netdev->name);
1888                 }
1889         } else {
1890                 /* remove vlan rx stripping. */
1891                 struct Vmxnet3_DSDevRead *devRead = &shared->devRead;
1892                 adapter->vlan_grp = NULL;
1893
1894                 if (devRead->misc.uptFeatures & UPT1_F_RXVLAN) {
1895                         int i;
1896
1897                         for (i = 0; i < VMXNET3_VFT_SIZE; i++) {
1898                                 /* clear entire vfTable; this also disables
1899                                  * VLAN rx filtering
1900                                  */
1901                                 vfTable[i] = 0;
1902                         }
1903                         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
1904                                                VMXNET3_CMD_UPDATE_VLAN_FILTERS);
1905
1906                         /* update FEATURES to device */
1907                         devRead->misc.uptFeatures &= ~UPT1_F_RXVLAN;
1908                         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
1909                                                VMXNET3_CMD_UPDATE_FEATURE);
1910                 }
1911         }
1912 }
1913
1914
1915 static void
1916 vmxnet3_restore_vlan(struct vmxnet3_adapter *adapter)
1917 {
1918         if (adapter->vlan_grp) {
1919                 u16 vid;
1920                 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
1921                 bool activeVlan = false;
1922
1923                 for (vid = 0; vid < VLAN_N_VID; vid++) {
1924                         if (vlan_group_get_device(adapter->vlan_grp, vid)) {
1925                                 VMXNET3_SET_VFTABLE_ENTRY(vfTable, vid);
1926                                 activeVlan = true;
1927                         }
1928                 }
1929                 if (activeVlan) {
1930                         /* continue to allow untagged pkts */
1931                         VMXNET3_SET_VFTABLE_ENTRY(vfTable, 0);
1932                 }
1933         }
1934 }
1935
1936
1937 static void
1938 vmxnet3_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
1939 {
1940         struct vmxnet3_adapter *adapter = netdev_priv(netdev);
1941         u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
1942
1943         VMXNET3_SET_VFTABLE_ENTRY(vfTable, vid);
1944         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
1945                                VMXNET3_CMD_UPDATE_VLAN_FILTERS);
1946 }
1947
1948
1949 static void
1950 vmxnet3_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
1951 {
1952         struct vmxnet3_adapter *adapter = netdev_priv(netdev);
1953         u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
1954
1955         VMXNET3_CLEAR_VFTABLE_ENTRY(vfTable, vid);
1956         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
1957                                VMXNET3_CMD_UPDATE_VLAN_FILTERS);
1958 }
1959
1960
1961 static u8 *
1962 vmxnet3_copy_mc(struct net_device *netdev)
1963 {
1964         u8 *buf = NULL;
1965         u32 sz = netdev_mc_count(netdev) * ETH_ALEN;
1966
1967         /* struct Vmxnet3_RxFilterConf.mfTableLen is u16. */
1968         if (sz <= 0xffff) {
1969                 /* We may be called with BH disabled */
1970                 buf = kmalloc(sz, GFP_ATOMIC);
1971                 if (buf) {
1972                         struct netdev_hw_addr *ha;
1973                         int i = 0;
1974
1975                         netdev_for_each_mc_addr(ha, netdev)
1976                                 memcpy(buf + i++ * ETH_ALEN, ha->addr,
1977                                        ETH_ALEN);
1978                 }
1979         }
1980         return buf;
1981 }
1982
1983
1984 static void
1985 vmxnet3_set_mc(struct net_device *netdev)
1986 {
1987         struct vmxnet3_adapter *adapter = netdev_priv(netdev);
1988         struct Vmxnet3_RxFilterConf *rxConf =
1989                                         &adapter->shared->devRead.rxFilterConf;
1990         u8 *new_table = NULL;
1991         u32 new_mode = VMXNET3_RXM_UCAST;
1992
1993         if (netdev->flags & IFF_PROMISC)
1994                 new_mode |= VMXNET3_RXM_PROMISC;
1995
1996         if (netdev->flags & IFF_BROADCAST)
1997                 new_mode |= VMXNET3_RXM_BCAST;
1998
1999         if (netdev->flags & IFF_ALLMULTI)
2000                 new_mode |= VMXNET3_RXM_ALL_MULTI;
2001         else
2002                 if (!netdev_mc_empty(netdev)) {
2003                         new_table = vmxnet3_copy_mc(netdev);
2004                         if (new_table) {
2005                                 new_mode |= VMXNET3_RXM_MCAST;
2006                                 rxConf->mfTableLen = cpu_to_le16(
2007                                         netdev_mc_count(netdev) * ETH_ALEN);
2008                                 rxConf->mfTablePA = cpu_to_le64(virt_to_phys(
2009                                                     new_table));
2010                         } else {
2011                                 printk(KERN_INFO "%s: failed to copy mcast list"
2012                                        ", setting ALL_MULTI\n", netdev->name);
2013                                 new_mode |= VMXNET3_RXM_ALL_MULTI;
2014                         }
2015                 }
2016
2017
2018         if (!(new_mode & VMXNET3_RXM_MCAST)) {
2019                 rxConf->mfTableLen = 0;
2020                 rxConf->mfTablePA = 0;
2021         }
2022
2023         if (new_mode != rxConf->rxMode) {
2024                 rxConf->rxMode = cpu_to_le32(new_mode);
2025                 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2026                                        VMXNET3_CMD_UPDATE_RX_MODE);
2027         }
2028
2029         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2030                                VMXNET3_CMD_UPDATE_MAC_FILTERS);
2031
2032         kfree(new_table);
2033 }
2034
2035 void
2036 vmxnet3_rq_destroy_all(struct vmxnet3_adapter *adapter)
2037 {
2038         int i;
2039
2040         for (i = 0; i < adapter->num_rx_queues; i++)
2041                 vmxnet3_rq_destroy(&adapter->rx_queue[i], adapter);
2042 }
2043
2044
2045 /*
2046  *   Set up driver_shared based on settings in adapter.
2047  */
2048
2049 static void
2050 vmxnet3_setup_driver_shared(struct vmxnet3_adapter *adapter)
2051 {
2052         struct Vmxnet3_DriverShared *shared = adapter->shared;
2053         struct Vmxnet3_DSDevRead *devRead = &shared->devRead;
2054         struct Vmxnet3_TxQueueConf *tqc;
2055         struct Vmxnet3_RxQueueConf *rqc;
2056         int i;
2057
2058         memset(shared, 0, sizeof(*shared));
2059
2060         /* driver settings */
2061         shared->magic = cpu_to_le32(VMXNET3_REV1_MAGIC);
2062         devRead->misc.driverInfo.version = cpu_to_le32(
2063                                                 VMXNET3_DRIVER_VERSION_NUM);
2064         devRead->misc.driverInfo.gos.gosBits = (sizeof(void *) == 4 ?
2065                                 VMXNET3_GOS_BITS_32 : VMXNET3_GOS_BITS_64);
2066         devRead->misc.driverInfo.gos.gosType = VMXNET3_GOS_TYPE_LINUX;
2067         *((u32 *)&devRead->misc.driverInfo.gos) = cpu_to_le32(
2068                                 *((u32 *)&devRead->misc.driverInfo.gos));
2069         devRead->misc.driverInfo.vmxnet3RevSpt = cpu_to_le32(1);
2070         devRead->misc.driverInfo.uptVerSpt = cpu_to_le32(1);
2071
2072         devRead->misc.ddPA = cpu_to_le64(virt_to_phys(adapter));
2073         devRead->misc.ddLen = cpu_to_le32(sizeof(struct vmxnet3_adapter));
2074
2075         /* set up feature flags */
2076         if (adapter->rxcsum)
2077                 devRead->misc.uptFeatures |= UPT1_F_RXCSUM;
2078
2079         if (adapter->lro) {
2080                 devRead->misc.uptFeatures |= UPT1_F_LRO;
2081                 devRead->misc.maxNumRxSG = cpu_to_le16(1 + MAX_SKB_FRAGS);
2082         }
2083         if ((adapter->netdev->features & NETIF_F_HW_VLAN_RX) &&
2084             adapter->vlan_grp) {
2085                 devRead->misc.uptFeatures |= UPT1_F_RXVLAN;
2086         }
2087
2088         devRead->misc.mtu = cpu_to_le32(adapter->netdev->mtu);
2089         devRead->misc.queueDescPA = cpu_to_le64(adapter->queue_desc_pa);
2090         devRead->misc.queueDescLen = cpu_to_le32(
2091                 adapter->num_tx_queues * sizeof(struct Vmxnet3_TxQueueDesc) +
2092                 adapter->num_rx_queues * sizeof(struct Vmxnet3_RxQueueDesc));
2093
2094         /* tx queue settings */
2095         devRead->misc.numTxQueues =  adapter->num_tx_queues;
2096         for (i = 0; i < adapter->num_tx_queues; i++) {
2097                 struct vmxnet3_tx_queue *tq = &adapter->tx_queue[i];
2098                 BUG_ON(adapter->tx_queue[i].tx_ring.base == NULL);
2099                 tqc = &adapter->tqd_start[i].conf;
2100                 tqc->txRingBasePA   = cpu_to_le64(tq->tx_ring.basePA);
2101                 tqc->dataRingBasePA = cpu_to_le64(tq->data_ring.basePA);
2102                 tqc->compRingBasePA = cpu_to_le64(tq->comp_ring.basePA);
2103                 tqc->ddPA           = cpu_to_le64(virt_to_phys(tq->buf_info));
2104                 tqc->txRingSize     = cpu_to_le32(tq->tx_ring.size);
2105                 tqc->dataRingSize   = cpu_to_le32(tq->data_ring.size);
2106                 tqc->compRingSize   = cpu_to_le32(tq->comp_ring.size);
2107                 tqc->ddLen          = cpu_to_le32(
2108                                         sizeof(struct vmxnet3_tx_buf_info) *
2109                                         tqc->txRingSize);
2110                 tqc->intrIdx        = tq->comp_ring.intr_idx;
2111         }
2112
2113         /* rx queue settings */
2114         devRead->misc.numRxQueues = adapter->num_rx_queues;
2115         for (i = 0; i < adapter->num_rx_queues; i++) {
2116                 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i];
2117                 rqc = &adapter->rqd_start[i].conf;
2118                 rqc->rxRingBasePA[0] = cpu_to_le64(rq->rx_ring[0].basePA);
2119                 rqc->rxRingBasePA[1] = cpu_to_le64(rq->rx_ring[1].basePA);
2120                 rqc->compRingBasePA  = cpu_to_le64(rq->comp_ring.basePA);
2121                 rqc->ddPA            = cpu_to_le64(virt_to_phys(
2122                                                         rq->buf_info));
2123                 rqc->rxRingSize[0]   = cpu_to_le32(rq->rx_ring[0].size);
2124                 rqc->rxRingSize[1]   = cpu_to_le32(rq->rx_ring[1].size);
2125                 rqc->compRingSize    = cpu_to_le32(rq->comp_ring.size);
2126                 rqc->ddLen           = cpu_to_le32(
2127                                         sizeof(struct vmxnet3_rx_buf_info) *
2128                                         (rqc->rxRingSize[0] +
2129                                          rqc->rxRingSize[1]));
2130                 rqc->intrIdx         = rq->comp_ring.intr_idx;
2131         }
2132
2133 #ifdef VMXNET3_RSS
2134         memset(adapter->rss_conf, 0, sizeof(*adapter->rss_conf));
2135
2136         if (adapter->rss) {
2137                 struct UPT1_RSSConf *rssConf = adapter->rss_conf;
2138                 devRead->misc.uptFeatures |= UPT1_F_RSS;
2139                 devRead->misc.numRxQueues = adapter->num_rx_queues;
2140                 rssConf->hashType = UPT1_RSS_HASH_TYPE_TCP_IPV4 |
2141                                     UPT1_RSS_HASH_TYPE_IPV4 |
2142                                     UPT1_RSS_HASH_TYPE_TCP_IPV6 |
2143                                     UPT1_RSS_HASH_TYPE_IPV6;
2144                 rssConf->hashFunc = UPT1_RSS_HASH_FUNC_TOEPLITZ;
2145                 rssConf->hashKeySize = UPT1_RSS_MAX_KEY_SIZE;
2146                 rssConf->indTableSize = VMXNET3_RSS_IND_TABLE_SIZE;
2147                 get_random_bytes(&rssConf->hashKey[0], rssConf->hashKeySize);
2148                 for (i = 0; i < rssConf->indTableSize; i++)
2149                         rssConf->indTable[i] = i % adapter->num_rx_queues;
2150
2151                 devRead->rssConfDesc.confVer = 1;
2152                 devRead->rssConfDesc.confLen = sizeof(*rssConf);
2153                 devRead->rssConfDesc.confPA  = virt_to_phys(rssConf);
2154         }
2155
2156 #endif /* VMXNET3_RSS */
2157
2158         /* intr settings */
2159         devRead->intrConf.autoMask = adapter->intr.mask_mode ==
2160                                      VMXNET3_IMM_AUTO;
2161         devRead->intrConf.numIntrs = adapter->intr.num_intrs;
2162         for (i = 0; i < adapter->intr.num_intrs; i++)
2163                 devRead->intrConf.modLevels[i] = adapter->intr.mod_levels[i];
2164
2165         devRead->intrConf.eventIntrIdx = adapter->intr.event_intr_idx;
2166         devRead->intrConf.intrCtrl |= cpu_to_le32(VMXNET3_IC_DISABLE_ALL);
2167
2168         /* rx filter settings */
2169         devRead->rxFilterConf.rxMode = 0;
2170         vmxnet3_restore_vlan(adapter);
2171         /* the rest are already zeroed */
2172 }
2173
2174
2175 int
2176 vmxnet3_activate_dev(struct vmxnet3_adapter *adapter)
2177 {
2178         int err, i;
2179         u32 ret;
2180
2181         dev_dbg(&adapter->netdev->dev, "%s: skb_buf_size %d, rx_buf_per_pkt %d,"
2182                 " ring sizes %u %u %u\n", adapter->netdev->name,
2183                 adapter->skb_buf_size, adapter->rx_buf_per_pkt,
2184                 adapter->tx_queue[0].tx_ring.size,
2185                 adapter->rx_queue[0].rx_ring[0].size,
2186                 adapter->rx_queue[0].rx_ring[1].size);
2187
2188         vmxnet3_tq_init_all(adapter);
2189         err = vmxnet3_rq_init_all(adapter);
2190         if (err) {
2191                 printk(KERN_ERR "Failed to init rx queue for %s: error %d\n",
2192                        adapter->netdev->name, err);
2193                 goto rq_err;
2194         }
2195
2196         err = vmxnet3_request_irqs(adapter);
2197         if (err) {
2198                 printk(KERN_ERR "Failed to setup irq for %s: error %d\n",
2199                        adapter->netdev->name, err);
2200                 goto irq_err;
2201         }
2202
2203         vmxnet3_setup_driver_shared(adapter);
2204
2205         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAL, VMXNET3_GET_ADDR_LO(
2206                                adapter->shared_pa));
2207         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAH, VMXNET3_GET_ADDR_HI(
2208                                adapter->shared_pa));
2209         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2210                                VMXNET3_CMD_ACTIVATE_DEV);
2211         ret = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);
2212
2213         if (ret != 0) {
2214                 printk(KERN_ERR "Failed to activate dev %s: error %u\n",
2215                        adapter->netdev->name, ret);
2216                 err = -EINVAL;
2217                 goto activate_err;
2218         }
2219
2220         for (i = 0; i < adapter->num_rx_queues; i++) {
2221                 VMXNET3_WRITE_BAR0_REG(adapter,
2222                                 VMXNET3_REG_RXPROD + i * VMXNET3_REG_ALIGN,
2223                                 adapter->rx_queue[i].rx_ring[0].next2fill);
2224                 VMXNET3_WRITE_BAR0_REG(adapter, (VMXNET3_REG_RXPROD2 +
2225                                 (i * VMXNET3_REG_ALIGN)),
2226                                 adapter->rx_queue[i].rx_ring[1].next2fill);
2227         }
2228
2229         /* Apply the rx filter settins last. */
2230         vmxnet3_set_mc(adapter->netdev);
2231
2232         /*
2233          * Check link state when first activating device. It will start the
2234          * tx queue if the link is up.
2235          */
2236         vmxnet3_check_link(adapter, true);
2237         for (i = 0; i < adapter->num_rx_queues; i++)
2238                 napi_enable(&adapter->rx_queue[i].napi);
2239         vmxnet3_enable_all_intrs(adapter);
2240         clear_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state);
2241         return 0;
2242
2243 activate_err:
2244         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAL, 0);
2245         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAH, 0);
2246         vmxnet3_free_irqs(adapter);
2247 irq_err:
2248 rq_err:
2249         /* free up buffers we allocated */
2250         vmxnet3_rq_cleanup_all(adapter);
2251         return err;
2252 }
2253
2254
2255 void
2256 vmxnet3_reset_dev(struct vmxnet3_adapter *adapter)
2257 {
2258         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_RESET_DEV);
2259 }
2260
2261
2262 int
2263 vmxnet3_quiesce_dev(struct vmxnet3_adapter *adapter)
2264 {
2265         int i;
2266         if (test_and_set_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state))
2267                 return 0;
2268
2269
2270         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2271                                VMXNET3_CMD_QUIESCE_DEV);
2272         vmxnet3_disable_all_intrs(adapter);
2273
2274         for (i = 0; i < adapter->num_rx_queues; i++)
2275                 napi_disable(&adapter->rx_queue[i].napi);
2276         netif_tx_disable(adapter->netdev);
2277         adapter->link_speed = 0;
2278         netif_carrier_off(adapter->netdev);
2279
2280         vmxnet3_tq_cleanup_all(adapter);
2281         vmxnet3_rq_cleanup_all(adapter);
2282         vmxnet3_free_irqs(adapter);
2283         return 0;
2284 }
2285
2286
2287 static void
2288 vmxnet3_write_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac)
2289 {
2290         u32 tmp;
2291
2292         tmp = *(u32 *)mac;
2293         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_MACL, tmp);
2294
2295         tmp = (mac[5] << 8) | mac[4];
2296         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_MACH, tmp);
2297 }
2298
2299
2300 static int
2301 vmxnet3_set_mac_addr(struct net_device *netdev, void *p)
2302 {
2303         struct sockaddr *addr = p;
2304         struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2305
2306         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2307         vmxnet3_write_mac_addr(adapter, addr->sa_data);
2308
2309         return 0;
2310 }
2311
2312
2313 /* ==================== initialization and cleanup routines ============ */
2314
2315 static int
2316 vmxnet3_alloc_pci_resources(struct vmxnet3_adapter *adapter, bool *dma64)
2317 {
2318         int err;
2319         unsigned long mmio_start, mmio_len;
2320         struct pci_dev *pdev = adapter->pdev;
2321
2322         err = pci_enable_device(pdev);
2323         if (err) {
2324                 printk(KERN_ERR "Failed to enable adapter %s: error %d\n",
2325                        pci_name(pdev), err);
2326                 return err;
2327         }
2328
2329         if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) == 0) {
2330                 if (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)) != 0) {
2331                         printk(KERN_ERR "pci_set_consistent_dma_mask failed "
2332                                "for adapter %s\n", pci_name(pdev));
2333                         err = -EIO;
2334                         goto err_set_mask;
2335                 }
2336                 *dma64 = true;
2337         } else {
2338                 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) {
2339                         printk(KERN_ERR "pci_set_dma_mask failed for adapter "
2340                                "%s\n",  pci_name(pdev));
2341                         err = -EIO;
2342                         goto err_set_mask;
2343                 }
2344                 *dma64 = false;
2345         }
2346
2347         err = pci_request_selected_regions(pdev, (1 << 2) - 1,
2348                                            vmxnet3_driver_name);
2349         if (err) {
2350                 printk(KERN_ERR "Failed to request region for adapter %s: "
2351                        "error %d\n", pci_name(pdev), err);
2352                 goto err_set_mask;
2353         }
2354
2355         pci_set_master(pdev);
2356
2357         mmio_start = pci_resource_start(pdev, 0);
2358         mmio_len = pci_resource_len(pdev, 0);
2359         adapter->hw_addr0 = ioremap(mmio_start, mmio_len);
2360         if (!adapter->hw_addr0) {
2361                 printk(KERN_ERR "Failed to map bar0 for adapter %s\n",
2362                        pci_name(pdev));
2363                 err = -EIO;
2364                 goto err_ioremap;
2365         }
2366
2367         mmio_start = pci_resource_start(pdev, 1);
2368         mmio_len = pci_resource_len(pdev, 1);
2369         adapter->hw_addr1 = ioremap(mmio_start, mmio_len);
2370         if (!adapter->hw_addr1) {
2371                 printk(KERN_ERR "Failed to map bar1 for adapter %s\n",
2372                        pci_name(pdev));
2373                 err = -EIO;
2374                 goto err_bar1;
2375         }
2376         return 0;
2377
2378 err_bar1:
2379         iounmap(adapter->hw_addr0);
2380 err_ioremap:
2381         pci_release_selected_regions(pdev, (1 << 2) - 1);
2382 err_set_mask:
2383         pci_disable_device(pdev);
2384         return err;
2385 }
2386
2387
2388 static void
2389 vmxnet3_free_pci_resources(struct vmxnet3_adapter *adapter)
2390 {
2391         BUG_ON(!adapter->pdev);
2392
2393         iounmap(adapter->hw_addr0);
2394         iounmap(adapter->hw_addr1);
2395         pci_release_selected_regions(adapter->pdev, (1 << 2) - 1);
2396         pci_disable_device(adapter->pdev);
2397 }
2398
2399
2400 static void
2401 vmxnet3_adjust_rx_ring_size(struct vmxnet3_adapter *adapter)
2402 {
2403         size_t sz, i, ring0_size, ring1_size, comp_size;
2404         struct vmxnet3_rx_queue *rq = &adapter->rx_queue[0];
2405
2406
2407         if (adapter->netdev->mtu <= VMXNET3_MAX_SKB_BUF_SIZE -
2408                                     VMXNET3_MAX_ETH_HDR_SIZE) {
2409                 adapter->skb_buf_size = adapter->netdev->mtu +
2410                                         VMXNET3_MAX_ETH_HDR_SIZE;
2411                 if (adapter->skb_buf_size < VMXNET3_MIN_T0_BUF_SIZE)
2412                         adapter->skb_buf_size = VMXNET3_MIN_T0_BUF_SIZE;
2413
2414                 adapter->rx_buf_per_pkt = 1;
2415         } else {
2416                 adapter->skb_buf_size = VMXNET3_MAX_SKB_BUF_SIZE;
2417                 sz = adapter->netdev->mtu - VMXNET3_MAX_SKB_BUF_SIZE +
2418                                             VMXNET3_MAX_ETH_HDR_SIZE;
2419                 adapter->rx_buf_per_pkt = 1 + (sz + PAGE_SIZE - 1) / PAGE_SIZE;
2420         }
2421
2422         /*
2423          * for simplicity, force the ring0 size to be a multiple of
2424          * rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN
2425          */
2426         sz = adapter->rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN;
2427         ring0_size = adapter->rx_queue[0].rx_ring[0].size;
2428         ring0_size = (ring0_size + sz - 1) / sz * sz;
2429         ring0_size = min_t(u32, rq->rx_ring[0].size, VMXNET3_RX_RING_MAX_SIZE /
2430                            sz * sz);
2431         ring1_size = adapter->rx_queue[0].rx_ring[1].size;
2432         comp_size = ring0_size + ring1_size;
2433
2434         for (i = 0; i < adapter->num_rx_queues; i++) {
2435                 rq = &adapter->rx_queue[i];
2436                 rq->rx_ring[0].size = ring0_size;
2437                 rq->rx_ring[1].size = ring1_size;
2438                 rq->comp_ring.size = comp_size;
2439         }
2440 }
2441
2442
2443 int
2444 vmxnet3_create_queues(struct vmxnet3_adapter *adapter, u32 tx_ring_size,
2445                       u32 rx_ring_size, u32 rx_ring2_size)
2446 {
2447         int err = 0, i;
2448
2449         for (i = 0; i < adapter->num_tx_queues; i++) {
2450                 struct vmxnet3_tx_queue *tq = &adapter->tx_queue[i];
2451                 tq->tx_ring.size   = tx_ring_size;
2452                 tq->data_ring.size = tx_ring_size;
2453                 tq->comp_ring.size = tx_ring_size;
2454                 tq->shared = &adapter->tqd_start[i].ctrl;
2455                 tq->stopped = true;
2456                 tq->adapter = adapter;
2457                 tq->qid = i;
2458                 err = vmxnet3_tq_create(tq, adapter);
2459                 /*
2460                  * Too late to change num_tx_queues. We cannot do away with
2461                  * lesser number of queues than what we asked for
2462                  */
2463                 if (err)
2464                         goto queue_err;
2465         }
2466
2467         adapter->rx_queue[0].rx_ring[0].size = rx_ring_size;
2468         adapter->rx_queue[0].rx_ring[1].size = rx_ring2_size;
2469         vmxnet3_adjust_rx_ring_size(adapter);
2470         for (i = 0; i < adapter->num_rx_queues; i++) {
2471                 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i];
2472                 /* qid and qid2 for rx queues will be assigned later when num
2473                  * of rx queues is finalized after allocating intrs */
2474                 rq->shared = &adapter->rqd_start[i].ctrl;
2475                 rq->adapter = adapter;
2476                 err = vmxnet3_rq_create(rq, adapter);
2477                 if (err) {
2478                         if (i == 0) {
2479                                 printk(KERN_ERR "Could not allocate any rx"
2480                                        "queues. Aborting.\n");
2481                                 goto queue_err;
2482                         } else {
2483                                 printk(KERN_INFO "Number of rx queues changed "
2484                                        "to : %d.\n", i);
2485                                 adapter->num_rx_queues = i;
2486                                 err = 0;
2487                                 break;
2488                         }
2489                 }
2490         }
2491         return err;
2492 queue_err:
2493         vmxnet3_tq_destroy_all(adapter);
2494         return err;
2495 }
2496
2497 static int
2498 vmxnet3_open(struct net_device *netdev)
2499 {
2500         struct vmxnet3_adapter *adapter;
2501         int err, i;
2502
2503         adapter = netdev_priv(netdev);
2504
2505         for (i = 0; i < adapter->num_tx_queues; i++)
2506                 spin_lock_init(&adapter->tx_queue[i].tx_lock);
2507
2508         err = vmxnet3_create_queues(adapter, VMXNET3_DEF_TX_RING_SIZE,
2509                                     VMXNET3_DEF_RX_RING_SIZE,
2510                                     VMXNET3_DEF_RX_RING_SIZE);
2511         if (err)
2512                 goto queue_err;
2513
2514         err = vmxnet3_activate_dev(adapter);
2515         if (err)
2516                 goto activate_err;
2517
2518         return 0;
2519
2520 activate_err:
2521         vmxnet3_rq_destroy_all(adapter);
2522         vmxnet3_tq_destroy_all(adapter);
2523 queue_err:
2524         return err;
2525 }
2526
2527
2528 static int
2529 vmxnet3_close(struct net_device *netdev)
2530 {
2531         struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2532
2533         /*
2534          * Reset_work may be in the middle of resetting the device, wait for its
2535          * completion.
2536          */
2537         while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state))
2538                 msleep(1);
2539
2540         vmxnet3_quiesce_dev(adapter);
2541
2542         vmxnet3_rq_destroy_all(adapter);
2543         vmxnet3_tq_destroy_all(adapter);
2544
2545         clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
2546
2547
2548         return 0;
2549 }
2550
2551
2552 void
2553 vmxnet3_force_close(struct vmxnet3_adapter *adapter)
2554 {
2555         int i;
2556
2557         /*
2558          * we must clear VMXNET3_STATE_BIT_RESETTING, otherwise
2559          * vmxnet3_close() will deadlock.
2560          */
2561         BUG_ON(test_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state));
2562
2563         /* we need to enable NAPI, otherwise dev_close will deadlock */
2564         for (i = 0; i < adapter->num_rx_queues; i++)
2565                 napi_enable(&adapter->rx_queue[i].napi);
2566         dev_close(adapter->netdev);
2567 }
2568
2569
2570 static int
2571 vmxnet3_change_mtu(struct net_device *netdev, int new_mtu)
2572 {
2573         struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2574         int err = 0;
2575
2576         if (new_mtu < VMXNET3_MIN_MTU || new_mtu > VMXNET3_MAX_MTU)
2577                 return -EINVAL;
2578
2579         if (new_mtu > 1500 && !adapter->jumbo_frame)
2580                 return -EINVAL;
2581
2582         netdev->mtu = new_mtu;
2583
2584         /*
2585          * Reset_work may be in the middle of resetting the device, wait for its
2586          * completion.
2587          */
2588         while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state))
2589                 msleep(1);
2590
2591         if (netif_running(netdev)) {
2592                 vmxnet3_quiesce_dev(adapter);
2593                 vmxnet3_reset_dev(adapter);
2594
2595                 /* we need to re-create the rx queue based on the new mtu */
2596                 vmxnet3_rq_destroy_all(adapter);
2597                 vmxnet3_adjust_rx_ring_size(adapter);
2598                 err = vmxnet3_rq_create_all(adapter);
2599                 if (err) {
2600                         printk(KERN_ERR "%s: failed to re-create rx queues,"
2601                                 " error %d. Closing it.\n", netdev->name, err);
2602                         goto out;
2603                 }
2604
2605                 err = vmxnet3_activate_dev(adapter);
2606                 if (err) {
2607                         printk(KERN_ERR "%s: failed to re-activate, error %d. "
2608                                 "Closing it\n", netdev->name, err);
2609                         goto out;
2610                 }
2611         }
2612
2613 out:
2614         clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
2615         if (err)
2616                 vmxnet3_force_close(adapter);
2617
2618         return err;
2619 }
2620
2621
2622 static void
2623 vmxnet3_declare_features(struct vmxnet3_adapter *adapter, bool dma64)
2624 {
2625         struct net_device *netdev = adapter->netdev;
2626
2627         netdev->features = NETIF_F_SG |
2628                 NETIF_F_HW_CSUM |
2629                 NETIF_F_HW_VLAN_TX |
2630                 NETIF_F_HW_VLAN_RX |
2631                 NETIF_F_HW_VLAN_FILTER |
2632                 NETIF_F_TSO |
2633                 NETIF_F_TSO6 |
2634                 NETIF_F_LRO;
2635
2636         printk(KERN_INFO "features: sg csum vlan jf tso tsoIPv6 lro");
2637
2638         adapter->rxcsum = true;
2639         adapter->jumbo_frame = true;
2640         adapter->lro = true;
2641
2642         if (dma64) {
2643                 netdev->features |= NETIF_F_HIGHDMA;
2644                 printk(" highDMA");
2645         }
2646
2647         netdev->vlan_features = netdev->features;
2648         printk("\n");
2649 }
2650
2651
2652 static void
2653 vmxnet3_read_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac)
2654 {
2655         u32 tmp;
2656
2657         tmp = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_MACL);
2658         *(u32 *)mac = tmp;
2659
2660         tmp = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_MACH);
2661         mac[4] = tmp & 0xff;
2662         mac[5] = (tmp >> 8) & 0xff;
2663 }
2664
2665 #ifdef CONFIG_PCI_MSI
2666
2667 /*
2668  * Enable MSIx vectors.
2669  * Returns :
2670  *      0 on successful enabling of required vectors,
2671  *      VMXNET3_LINUX_MIN_MSIX_VECT when only minumum number of vectors required
2672  *       could be enabled.
2673  *      number of vectors which can be enabled otherwise (this number is smaller
2674  *       than VMXNET3_LINUX_MIN_MSIX_VECT)
2675  */
2676
2677 static int
2678 vmxnet3_acquire_msix_vectors(struct vmxnet3_adapter *adapter,
2679                              int vectors)
2680 {
2681         int err = 0, vector_threshold;
2682         vector_threshold = VMXNET3_LINUX_MIN_MSIX_VECT;
2683
2684         while (vectors >= vector_threshold) {
2685                 err = pci_enable_msix(adapter->pdev, adapter->intr.msix_entries,
2686                                       vectors);
2687                 if (!err) {
2688                         adapter->intr.num_intrs = vectors;
2689                         return 0;
2690                 } else if (err < 0) {
2691                         printk(KERN_ERR "Failed to enable MSI-X for %s, error"
2692                                " %d\n", adapter->netdev->name, err);
2693                         vectors = 0;
2694                 } else if (err < vector_threshold) {
2695                         break;
2696                 } else {
2697                         /* If fails to enable required number of MSI-x vectors
2698                          * try enabling 3 of them. One each for rx, tx and event
2699                          */
2700                         vectors = vector_threshold;
2701                         printk(KERN_ERR "Failed to enable %d MSI-X for %s, try"
2702                                " %d instead\n", vectors, adapter->netdev->name,
2703                                vector_threshold);
2704                 }
2705         }
2706
2707         printk(KERN_INFO "Number of MSI-X interrupts which can be allocatedi"
2708                " are lower than min threshold required.\n");
2709         return err;
2710 }
2711
2712
2713 #endif /* CONFIG_PCI_MSI */
2714
2715 static void
2716 vmxnet3_alloc_intr_resources(struct vmxnet3_adapter *adapter)
2717 {
2718         u32 cfg;
2719
2720         /* intr settings */
2721         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2722                                VMXNET3_CMD_GET_CONF_INTR);
2723         cfg = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);
2724         adapter->intr.type = cfg & 0x3;
2725         adapter->intr.mask_mode = (cfg >> 2) & 0x3;
2726
2727         if (adapter->intr.type == VMXNET3_IT_AUTO) {
2728                 adapter->intr.type = VMXNET3_IT_MSIX;
2729         }
2730
2731 #ifdef CONFIG_PCI_MSI
2732         if (adapter->intr.type == VMXNET3_IT_MSIX) {
2733                 int vector, err = 0;
2734
2735                 adapter->intr.num_intrs = (adapter->share_intr ==
2736                                            VMXNET3_INTR_TXSHARE) ? 1 :
2737                                            adapter->num_tx_queues;
2738                 adapter->intr.num_intrs += (adapter->share_intr ==
2739                                            VMXNET3_INTR_BUDDYSHARE) ? 0 :
2740                                            adapter->num_rx_queues;
2741                 adapter->intr.num_intrs += 1;           /* for link event */
2742
2743                 adapter->intr.num_intrs = (adapter->intr.num_intrs >
2744                                            VMXNET3_LINUX_MIN_MSIX_VECT
2745                                            ? adapter->intr.num_intrs :
2746                                            VMXNET3_LINUX_MIN_MSIX_VECT);
2747
2748                 for (vector = 0; vector < adapter->intr.num_intrs; vector++)
2749                         adapter->intr.msix_entries[vector].entry = vector;
2750
2751                 err = vmxnet3_acquire_msix_vectors(adapter,
2752                                                    adapter->intr.num_intrs);
2753                 /* If we cannot allocate one MSIx vector per queue
2754                  * then limit the number of rx queues to 1
2755                  */
2756                 if (err == VMXNET3_LINUX_MIN_MSIX_VECT) {
2757                         if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE
2758                             || adapter->num_rx_queues != 2) {
2759                                 adapter->share_intr = VMXNET3_INTR_TXSHARE;
2760                                 printk(KERN_ERR "Number of rx queues : 1\n");
2761                                 adapter->num_rx_queues = 1;
2762                                 adapter->intr.num_intrs =
2763                                                 VMXNET3_LINUX_MIN_MSIX_VECT;
2764                         }
2765                         return;
2766                 }
2767                 if (!err)
2768                         return;
2769
2770                 /* If we cannot allocate MSIx vectors use only one rx queue */
2771                 printk(KERN_INFO "Failed to enable MSI-X for %s, error %d."
2772                        "#rx queues : 1, try MSI\n", adapter->netdev->name, err);
2773
2774                 adapter->intr.type = VMXNET3_IT_MSI;
2775         }
2776
2777         if (adapter->intr.type == VMXNET3_IT_MSI) {
2778                 int err;
2779                 err = pci_enable_msi(adapter->pdev);
2780                 if (!err) {
2781                         adapter->num_rx_queues = 1;
2782                         adapter->intr.num_intrs = 1;
2783                         return;
2784                 }
2785         }
2786 #endif /* CONFIG_PCI_MSI */
2787
2788         adapter->num_rx_queues = 1;
2789         printk(KERN_INFO "Using INTx interrupt, #Rx queues: 1.\n");
2790         adapter->intr.type = VMXNET3_IT_INTX;
2791
2792         /* INT-X related setting */
2793         adapter->intr.num_intrs = 1;
2794 }
2795
2796
2797 static void
2798 vmxnet3_free_intr_resources(struct vmxnet3_adapter *adapter)
2799 {
2800         if (adapter->intr.type == VMXNET3_IT_MSIX)
2801                 pci_disable_msix(adapter->pdev);
2802         else if (adapter->intr.type == VMXNET3_IT_MSI)
2803                 pci_disable_msi(adapter->pdev);
2804         else
2805                 BUG_ON(adapter->intr.type != VMXNET3_IT_INTX);
2806 }
2807
2808
2809 static void
2810 vmxnet3_tx_timeout(struct net_device *netdev)
2811 {
2812         struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2813         adapter->tx_timeout_count++;
2814
2815         printk(KERN_ERR "%s: tx hang\n", adapter->netdev->name);
2816         schedule_work(&adapter->work);
2817         netif_wake_queue(adapter->netdev);
2818 }
2819
2820
2821 static void
2822 vmxnet3_reset_work(struct work_struct *data)
2823 {
2824         struct vmxnet3_adapter *adapter;
2825
2826         adapter = container_of(data, struct vmxnet3_adapter, work);
2827
2828         /* if another thread is resetting the device, no need to proceed */
2829         if (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state))
2830                 return;
2831
2832         /* if the device is closed, we must leave it alone */
2833         rtnl_lock();
2834         if (netif_running(adapter->netdev)) {
2835                 printk(KERN_INFO "%s: resetting\n", adapter->netdev->name);
2836                 vmxnet3_quiesce_dev(adapter);
2837                 vmxnet3_reset_dev(adapter);
2838                 vmxnet3_activate_dev(adapter);
2839         } else {
2840                 printk(KERN_INFO "%s: already closed\n", adapter->netdev->name);
2841         }
2842         rtnl_unlock();
2843
2844         clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
2845 }
2846
2847
2848 static int __devinit
2849 vmxnet3_probe_device(struct pci_dev *pdev,
2850                      const struct pci_device_id *id)
2851 {
2852         static const struct net_device_ops vmxnet3_netdev_ops = {
2853                 .ndo_open = vmxnet3_open,
2854                 .ndo_stop = vmxnet3_close,
2855                 .ndo_start_xmit = vmxnet3_xmit_frame,
2856                 .ndo_set_mac_address = vmxnet3_set_mac_addr,
2857                 .ndo_change_mtu = vmxnet3_change_mtu,
2858                 .ndo_get_stats = vmxnet3_get_stats,
2859                 .ndo_tx_timeout = vmxnet3_tx_timeout,
2860                 .ndo_set_multicast_list = vmxnet3_set_mc,
2861                 .ndo_vlan_rx_register = vmxnet3_vlan_rx_register,
2862                 .ndo_vlan_rx_add_vid = vmxnet3_vlan_rx_add_vid,
2863                 .ndo_vlan_rx_kill_vid = vmxnet3_vlan_rx_kill_vid,
2864 #ifdef CONFIG_NET_POLL_CONTROLLER
2865                 .ndo_poll_controller = vmxnet3_netpoll,
2866 #endif
2867         };
2868         int err;
2869         bool dma64 = false; /* stupid gcc */
2870         u32 ver;
2871         struct net_device *netdev;
2872         struct vmxnet3_adapter *adapter;
2873         u8 mac[ETH_ALEN];
2874         int size;
2875         int num_tx_queues;
2876         int num_rx_queues;
2877
2878 #ifdef VMXNET3_RSS
2879         if (enable_mq)
2880                 num_rx_queues = min(VMXNET3_DEVICE_MAX_RX_QUEUES,
2881                                     (int)num_online_cpus());
2882         else
2883 #endif
2884                 num_rx_queues = 1;
2885
2886         if (enable_mq)
2887                 num_tx_queues = min(VMXNET3_DEVICE_MAX_TX_QUEUES,
2888                                     (int)num_online_cpus());
2889         else
2890                 num_tx_queues = 1;
2891
2892         netdev = alloc_etherdev_mq(sizeof(struct vmxnet3_adapter),
2893                                    max(num_tx_queues, num_rx_queues));
2894         printk(KERN_INFO "# of Tx queues : %d, # of Rx queues : %d\n",
2895                num_tx_queues, num_rx_queues);
2896
2897         if (!netdev) {
2898                 printk(KERN_ERR "Failed to alloc ethernet device for adapter "
2899                         "%s\n", pci_name(pdev));
2900                 return -ENOMEM;
2901         }
2902
2903         pci_set_drvdata(pdev, netdev);
2904         adapter = netdev_priv(netdev);
2905         adapter->netdev = netdev;
2906         adapter->pdev = pdev;
2907
2908         adapter->shared = pci_alloc_consistent(adapter->pdev,
2909                           sizeof(struct Vmxnet3_DriverShared),
2910                           &adapter->shared_pa);
2911         if (!adapter->shared) {
2912                 printk(KERN_ERR "Failed to allocate memory for %s\n",
2913                         pci_name(pdev));
2914                 err = -ENOMEM;
2915                 goto err_alloc_shared;
2916         }
2917
2918         adapter->num_rx_queues = num_rx_queues;
2919         adapter->num_tx_queues = num_tx_queues;
2920
2921         size = sizeof(struct Vmxnet3_TxQueueDesc) * adapter->num_tx_queues;
2922         size += sizeof(struct Vmxnet3_RxQueueDesc) * adapter->num_rx_queues;
2923         adapter->tqd_start = pci_alloc_consistent(adapter->pdev, size,
2924                              &adapter->queue_desc_pa);
2925
2926         if (!adapter->tqd_start) {
2927                 printk(KERN_ERR "Failed to allocate memory for %s\n",
2928                         pci_name(pdev));
2929                 err = -ENOMEM;
2930                 goto err_alloc_queue_desc;
2931         }
2932         adapter->rqd_start = (struct Vmxnet3_RxQueueDesc *)(adapter->tqd_start +
2933                                                         adapter->num_tx_queues);
2934
2935         adapter->pm_conf = kmalloc(sizeof(struct Vmxnet3_PMConf), GFP_KERNEL);
2936         if (adapter->pm_conf == NULL) {
2937                 printk(KERN_ERR "Failed to allocate memory for %s\n",
2938                         pci_name(pdev));
2939                 err = -ENOMEM;
2940                 goto err_alloc_pm;
2941         }
2942
2943 #ifdef VMXNET3_RSS
2944
2945         adapter->rss_conf = kmalloc(sizeof(struct UPT1_RSSConf), GFP_KERNEL);
2946         if (adapter->rss_conf == NULL) {
2947                 printk(KERN_ERR "Failed to allocate memory for %s\n",
2948                        pci_name(pdev));
2949                 err = -ENOMEM;
2950                 goto err_alloc_rss;
2951         }
2952 #endif /* VMXNET3_RSS */
2953
2954         err = vmxnet3_alloc_pci_resources(adapter, &dma64);
2955         if (err < 0)
2956                 goto err_alloc_pci;
2957
2958         ver = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_VRRS);
2959         if (ver & 1) {
2960                 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_VRRS, 1);
2961         } else {
2962                 printk(KERN_ERR "Incompatible h/w version (0x%x) for adapter"
2963                        " %s\n", ver, pci_name(pdev));
2964                 err = -EBUSY;
2965                 goto err_ver;
2966         }
2967
2968         ver = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_UVRS);
2969         if (ver & 1) {
2970                 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_UVRS, 1);
2971         } else {
2972                 printk(KERN_ERR "Incompatible upt version (0x%x) for "
2973                        "adapter %s\n", ver, pci_name(pdev));
2974                 err = -EBUSY;
2975                 goto err_ver;
2976         }
2977
2978         vmxnet3_declare_features(adapter, dma64);
2979
2980         adapter->dev_number = atomic_read(&devices_found);
2981
2982          adapter->share_intr = irq_share_mode;
2983         if (adapter->share_intr == VMXNET3_INTR_BUDDYSHARE &&
2984             adapter->num_tx_queues != adapter->num_rx_queues)
2985                 adapter->share_intr = VMXNET3_INTR_DONTSHARE;
2986
2987         vmxnet3_alloc_intr_resources(adapter);
2988
2989 #ifdef VMXNET3_RSS
2990         if (adapter->num_rx_queues > 1 &&
2991             adapter->intr.type == VMXNET3_IT_MSIX) {
2992                 adapter->rss = true;
2993                 printk(KERN_INFO "RSS is enabled.\n");
2994         } else {
2995                 adapter->rss = false;
2996         }
2997 #endif
2998
2999         vmxnet3_read_mac_addr(adapter, mac);
3000         memcpy(netdev->dev_addr,  mac, netdev->addr_len);
3001
3002         netdev->netdev_ops = &vmxnet3_netdev_ops;
3003         vmxnet3_set_ethtool_ops(netdev);
3004         netdev->watchdog_timeo = 5 * HZ;
3005
3006         INIT_WORK(&adapter->work, vmxnet3_reset_work);
3007
3008         if (adapter->intr.type == VMXNET3_IT_MSIX) {
3009                 int i;
3010                 for (i = 0; i < adapter->num_rx_queues; i++) {
3011                         netif_napi_add(adapter->netdev,
3012                                        &adapter->rx_queue[i].napi,
3013                                        vmxnet3_poll_rx_only, 64);
3014                 }
3015         } else {
3016                 netif_napi_add(adapter->netdev, &adapter->rx_queue[0].napi,
3017                                vmxnet3_poll, 64);
3018         }
3019
3020         netif_set_real_num_tx_queues(adapter->netdev, adapter->num_tx_queues);
3021         netif_set_real_num_rx_queues(adapter->netdev, adapter->num_rx_queues);
3022
3023         SET_NETDEV_DEV(netdev, &pdev->dev);
3024         err = register_netdev(netdev);
3025
3026         if (err) {
3027                 printk(KERN_ERR "Failed to register adapter %s\n",
3028                         pci_name(pdev));
3029                 goto err_register;
3030         }
3031
3032         set_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state);
3033         vmxnet3_check_link(adapter, false);
3034         atomic_inc(&devices_found);
3035         return 0;
3036
3037 err_register:
3038         vmxnet3_free_intr_resources(adapter);
3039 err_ver:
3040         vmxnet3_free_pci_resources(adapter);
3041 err_alloc_pci:
3042 #ifdef VMXNET3_RSS
3043         kfree(adapter->rss_conf);
3044 err_alloc_rss:
3045 #endif
3046         kfree(adapter->pm_conf);
3047 err_alloc_pm:
3048         pci_free_consistent(adapter->pdev, size, adapter->tqd_start,
3049                             adapter->queue_desc_pa);
3050 err_alloc_queue_desc:
3051         pci_free_consistent(adapter->pdev, sizeof(struct Vmxnet3_DriverShared),
3052                             adapter->shared, adapter->shared_pa);
3053 err_alloc_shared:
3054         pci_set_drvdata(pdev, NULL);
3055         free_netdev(netdev);
3056         return err;
3057 }
3058
3059
3060 static void __devexit
3061 vmxnet3_remove_device(struct pci_dev *pdev)
3062 {
3063         struct net_device *netdev = pci_get_drvdata(pdev);
3064         struct vmxnet3_adapter *adapter = netdev_priv(netdev);
3065         int size = 0;
3066         int num_rx_queues;
3067
3068 #ifdef VMXNET3_RSS
3069         if (enable_mq)
3070                 num_rx_queues = min(VMXNET3_DEVICE_MAX_RX_QUEUES,
3071                                     (int)num_online_cpus());
3072         else
3073 #endif
3074                 num_rx_queues = 1;
3075
3076         cancel_work_sync(&adapter->work);
3077
3078         unregister_netdev(netdev);
3079
3080         vmxnet3_free_intr_resources(adapter);
3081         vmxnet3_free_pci_resources(adapter);
3082 #ifdef VMXNET3_RSS
3083         kfree(adapter->rss_conf);
3084 #endif
3085         kfree(adapter->pm_conf);
3086
3087         size = sizeof(struct Vmxnet3_TxQueueDesc) * adapter->num_tx_queues;
3088         size += sizeof(struct Vmxnet3_RxQueueDesc) * num_rx_queues;
3089         pci_free_consistent(adapter->pdev, size, adapter->tqd_start,
3090                             adapter->queue_desc_pa);
3091         pci_free_consistent(adapter->pdev, sizeof(struct Vmxnet3_DriverShared),
3092                             adapter->shared, adapter->shared_pa);
3093         free_netdev(netdev);
3094 }
3095
3096
3097 #ifdef CONFIG_PM
3098
3099 static int
3100 vmxnet3_suspend(struct device *device)
3101 {
3102         struct pci_dev *pdev = to_pci_dev(device);
3103         struct net_device *netdev = pci_get_drvdata(pdev);
3104         struct vmxnet3_adapter *adapter = netdev_priv(netdev);
3105         struct Vmxnet3_PMConf *pmConf;
3106         struct ethhdr *ehdr;
3107         struct arphdr *ahdr;
3108         u8 *arpreq;
3109         struct in_device *in_dev;
3110         struct in_ifaddr *ifa;
3111         int i = 0;
3112
3113         if (!netif_running(netdev))
3114                 return 0;
3115
3116         vmxnet3_disable_all_intrs(adapter);
3117         vmxnet3_free_irqs(adapter);
3118         vmxnet3_free_intr_resources(adapter);
3119
3120         netif_device_detach(netdev);
3121         netif_tx_stop_all_queues(netdev);
3122
3123         /* Create wake-up filters. */
3124         pmConf = adapter->pm_conf;
3125         memset(pmConf, 0, sizeof(*pmConf));
3126
3127         if (adapter->wol & WAKE_UCAST) {
3128                 pmConf->filters[i].patternSize = ETH_ALEN;
3129                 pmConf->filters[i].maskSize = 1;
3130                 memcpy(pmConf->filters[i].pattern, netdev->dev_addr, ETH_ALEN);
3131                 pmConf->filters[i].mask[0] = 0x3F; /* LSB ETH_ALEN bits */
3132
3133                 pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_FILTER;
3134                 i++;
3135         }
3136
3137         if (adapter->wol & WAKE_ARP) {
3138                 in_dev = in_dev_get(netdev);
3139                 if (!in_dev)
3140                         goto skip_arp;
3141
3142                 ifa = (struct in_ifaddr *)in_dev->ifa_list;
3143                 if (!ifa)
3144                         goto skip_arp;
3145
3146                 pmConf->filters[i].patternSize = ETH_HLEN + /* Ethernet header*/
3147                         sizeof(struct arphdr) +         /* ARP header */
3148                         2 * ETH_ALEN +          /* 2 Ethernet addresses*/
3149                         2 * sizeof(u32);        /*2 IPv4 addresses */
3150                 pmConf->filters[i].maskSize =
3151                         (pmConf->filters[i].patternSize - 1) / 8 + 1;
3152
3153                 /* ETH_P_ARP in Ethernet header. */
3154                 ehdr = (struct ethhdr *)pmConf->filters[i].pattern;
3155                 ehdr->h_proto = htons(ETH_P_ARP);
3156
3157                 /* ARPOP_REQUEST in ARP header. */
3158                 ahdr = (struct arphdr *)&pmConf->filters[i].pattern[ETH_HLEN];
3159                 ahdr->ar_op = htons(ARPOP_REQUEST);
3160                 arpreq = (u8 *)(ahdr + 1);
3161
3162                 /* The Unicast IPv4 address in 'tip' field. */
3163                 arpreq += 2 * ETH_ALEN + sizeof(u32);
3164                 *(u32 *)arpreq = ifa->ifa_address;
3165
3166                 /* The mask for the relevant bits. */
3167                 pmConf->filters[i].mask[0] = 0x00;
3168                 pmConf->filters[i].mask[1] = 0x30; /* ETH_P_ARP */
3169                 pmConf->filters[i].mask[2] = 0x30; /* ARPOP_REQUEST */
3170                 pmConf->filters[i].mask[3] = 0x00;
3171                 pmConf->filters[i].mask[4] = 0xC0; /* IPv4 TIP */
3172                 pmConf->filters[i].mask[5] = 0x03; /* IPv4 TIP */
3173                 in_dev_put(in_dev);
3174
3175                 pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_FILTER;
3176                 i++;
3177         }
3178
3179 skip_arp:
3180         if (adapter->wol & WAKE_MAGIC)
3181                 pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_MAGIC;
3182
3183         pmConf->numFilters = i;
3184
3185         adapter->shared->devRead.pmConfDesc.confVer = cpu_to_le32(1);
3186         adapter->shared->devRead.pmConfDesc.confLen = cpu_to_le32(sizeof(
3187                                                                   *pmConf));
3188         adapter->shared->devRead.pmConfDesc.confPA = cpu_to_le64(virt_to_phys(
3189                                                                  pmConf));
3190
3191         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
3192                                VMXNET3_CMD_UPDATE_PMCFG);
3193
3194         pci_save_state(pdev);
3195         pci_enable_wake(pdev, pci_choose_state(pdev, PMSG_SUSPEND),
3196                         adapter->wol);
3197         pci_disable_device(pdev);
3198         pci_set_power_state(pdev, pci_choose_state(pdev, PMSG_SUSPEND));
3199
3200         return 0;
3201 }
3202
3203
3204 static int
3205 vmxnet3_resume(struct device *device)
3206 {
3207         int err;
3208         struct pci_dev *pdev = to_pci_dev(device);
3209         struct net_device *netdev = pci_get_drvdata(pdev);
3210         struct vmxnet3_adapter *adapter = netdev_priv(netdev);
3211         struct Vmxnet3_PMConf *pmConf;
3212
3213         if (!netif_running(netdev))
3214                 return 0;
3215
3216         /* Destroy wake-up filters. */
3217         pmConf = adapter->pm_conf;
3218         memset(pmConf, 0, sizeof(*pmConf));
3219
3220         adapter->shared->devRead.pmConfDesc.confVer = cpu_to_le32(1);
3221         adapter->shared->devRead.pmConfDesc.confLen = cpu_to_le32(sizeof(
3222                                                                   *pmConf));
3223         adapter->shared->devRead.pmConfDesc.confPA = cpu_to_le64(virt_to_phys(
3224                                                                  pmConf));
3225
3226         netif_device_attach(netdev);
3227         pci_set_power_state(pdev, PCI_D0);
3228         pci_restore_state(pdev);
3229         err = pci_enable_device_mem(pdev);
3230         if (err != 0)
3231                 return err;
3232
3233         pci_enable_wake(pdev, PCI_D0, 0);
3234
3235         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
3236                                VMXNET3_CMD_UPDATE_PMCFG);
3237         vmxnet3_alloc_intr_resources(adapter);
3238         vmxnet3_request_irqs(adapter);
3239         vmxnet3_enable_all_intrs(adapter);
3240
3241         return 0;
3242 }
3243
3244 static const struct dev_pm_ops vmxnet3_pm_ops = {
3245         .suspend = vmxnet3_suspend,
3246         .resume = vmxnet3_resume,
3247 };
3248 #endif
3249
3250 static struct pci_driver vmxnet3_driver = {
3251         .name           = vmxnet3_driver_name,
3252         .id_table       = vmxnet3_pciid_table,
3253         .probe          = vmxnet3_probe_device,
3254         .remove         = __devexit_p(vmxnet3_remove_device),
3255 #ifdef CONFIG_PM
3256         .driver.pm      = &vmxnet3_pm_ops,
3257 #endif
3258 };
3259
3260
3261 static int __init
3262 vmxnet3_init_module(void)
3263 {
3264         printk(KERN_INFO "%s - version %s\n", VMXNET3_DRIVER_DESC,
3265                 VMXNET3_DRIVER_VERSION_REPORT);
3266         return pci_register_driver(&vmxnet3_driver);
3267 }
3268
3269 module_init(vmxnet3_init_module);
3270
3271
3272 static void
3273 vmxnet3_exit_module(void)
3274 {
3275         pci_unregister_driver(&vmxnet3_driver);
3276 }
3277
3278 module_exit(vmxnet3_exit_module);
3279
3280 MODULE_AUTHOR("VMware, Inc.");
3281 MODULE_DESCRIPTION(VMXNET3_DRIVER_DESC);
3282 MODULE_LICENSE("GPL v2");
3283 MODULE_VERSION(VMXNET3_DRIVER_VERSION_STRING);