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 <linux/module.h>
  28 #include <net/ip6_checksum.h>
  29
  30 #include "vmxnet3_int.h"
  31
  32 char vmxnet3_driver_name[] = "vmxnet3";
  33 #define VMXNET3_DRIVER_DESC "VMware vmxnet3 virtual NIC driver"
  34
  35 /*
  36  * PCI Device ID Table
  37  * Last entry must be all 0s
  38  */
  39 static DEFINE_PCI_DEVICE_TABLE(vmxnet3_pciid_table) = {
  40         {PCI_VDEVICE(VMWARE, PCI_DEVICE_ID_VMWARE_VMXNET3)},
  41         {0}
  42 };
  43
  44 MODULE_DEVICE_TABLE(pci, vmxnet3_pciid_table);
  45
  46 static atomic_t devices_found;
  47
  48 #define VMXNET3_MAX_DEVICES 10
  49 static int enable_mq = 1;
  50 static int irq_share_mode;
  51
  52 static void
  53 vmxnet3_write_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac);
  54
  55 /*
  56  *    Enable/Disable the given intr
  57  */
  58 static void
  59 vmxnet3_enable_intr(struct vmxnet3_adapter *adapter, unsigned intr_idx)
  60 {
  61         VMXNET3_WRITE_BAR0_REG(adapter, VMXNET3_REG_IMR + intr_idx * 8, 0);
  62 }
  63
  64
  65 static void
  66 vmxnet3_disable_intr(struct vmxnet3_adapter *adapter, unsigned intr_idx)
  67 {
  68         VMXNET3_WRITE_BAR0_REG(adapter, VMXNET3_REG_IMR + intr_idx * 8, 1);
  69 }
  70
  71
  72 /*
  73  *    Enable/Disable all intrs used by the device
  74  */
  75 static void
  76 vmxnet3_enable_all_intrs(struct vmxnet3_adapter *adapter)
  77 {
  78         int i;
  79
  80         for (i = 0; i < adapter->intr.num_intrs; i++)
  81                 vmxnet3_enable_intr(adapter, i);
  82         adapter->shared->devRead.intrConf.intrCtrl &=
  83                                         cpu_to_le32(~VMXNET3_IC_DISABLE_ALL);
  84 }
  85
  86
  87 static void
  88 vmxnet3_disable_all_intrs(struct vmxnet3_adapter *adapter)
  89 {
  90         int i;
  91
  92         adapter->shared->devRead.intrConf.intrCtrl |=
  93                                         cpu_to_le32(VMXNET3_IC_DISABLE_ALL);
  94         for (i = 0; i < adapter->intr.num_intrs; i++)
  95                 vmxnet3_disable_intr(adapter, i);
  96 }
  97
  98
  99 static void
 100 vmxnet3_ack_events(struct vmxnet3_adapter *adapter, u32 events)
 101 {
 102         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_ECR, events);
 103 }
 104
 105
 106 static bool
 107 vmxnet3_tq_stopped(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter)
 108 {
 109         return tq->stopped;
 110 }
 111
 112
 113 static void
 114 vmxnet3_tq_start(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter)
 115 {
 116         tq->stopped = false;
 117         netif_start_subqueue(adapter->netdev, tq - adapter->tx_queue);
 118 }
 119
 120
 121 static void
 122 vmxnet3_tq_wake(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter)
 123 {
 124         tq->stopped = false;
 125         netif_wake_subqueue(adapter->netdev, (tq - adapter->tx_queue));
 126 }
 127
 128
 129 static void
 130 vmxnet3_tq_stop(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter)
 131 {
 132         tq->stopped = true;
 133         tq->num_stop++;
 134         netif_stop_subqueue(adapter->netdev, (tq - adapter->tx_queue));
 135 }
 136
 137
 138 /*
 139  * Check the link state. This may start or stop the tx queue.
 140  */
 141 static void
 142 vmxnet3_check_link(struct vmxnet3_adapter *adapter, bool affectTxQueue)
 143 {
 144         u32 ret;
 145         int i;
 146         unsigned long flags;
 147
 148         spin_lock_irqsave(&adapter->cmd_lock, flags);
 149         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_GET_LINK);
 150         ret = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);
 151         spin_unlock_irqrestore(&adapter->cmd_lock, flags);
 152
 153         adapter->link_speed = ret >> 16;
 154         if (ret & 1) { /* Link is up. */
 155                 printk(KERN_INFO "%s: NIC Link is Up %d Mbps\n",
 156                        adapter->netdev->name, adapter->link_speed);
 157                 if (!netif_carrier_ok(adapter->netdev))
 158                         netif_carrier_on(adapter->netdev);
 159
 160                 if (affectTxQueue) {
 161                         for (i = 0; i < adapter->num_tx_queues; i++)
 162                                 vmxnet3_tq_start(&adapter->tx_queue[i],
 163                                                  adapter);
 164                 }
 165         } else {
 166                 printk(KERN_INFO "%s: NIC Link is Down\n",
 167                        adapter->netdev->name);
 168                 if (netif_carrier_ok(adapter->netdev))
 169                         netif_carrier_off(adapter->netdev);
 170
 171                 if (affectTxQueue) {
 172                         for (i = 0; i < adapter->num_tx_queues; i++)
 173                                 vmxnet3_tq_stop(&adapter->tx_queue[i], adapter);
 174                 }
 175         }
 176 }
 177
 178 static void
 179 vmxnet3_process_events(struct vmxnet3_adapter *adapter)
 180 {
 181         int i;
 182         unsigned long flags;
 183         u32 events = le32_to_cpu(adapter->shared->ecr);
 184         if (!events)
 185                 return;
 186
 187         vmxnet3_ack_events(adapter, events);
 188
 189         /* Check if link state has changed */
 190         if (events & VMXNET3_ECR_LINK)
 191                 vmxnet3_check_link(adapter, true);
 192
 193         /* Check if there is an error on xmit/recv queues */
 194         if (events & (VMXNET3_ECR_TQERR | VMXNET3_ECR_RQERR)) {
 195                 spin_lock_irqsave(&adapter->cmd_lock, flags);
 196                 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
 197                                        VMXNET3_CMD_GET_QUEUE_STATUS);
 198                 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
 199
 200                 for (i = 0; i < adapter->num_tx_queues; i++)
 201                         if (adapter->tqd_start[i].status.stopped)
 202                                 dev_err(&adapter->netdev->dev,
 203                                         "%s: tq[%d] error 0x%x\n",
 204                                         adapter->netdev->name, i, le32_to_cpu(
 205                                         adapter->tqd_start[i].status.error));
 206                 for (i = 0; i < adapter->num_rx_queues; i++)
 207                         if (adapter->rqd_start[i].status.stopped)
 208                                 dev_err(&adapter->netdev->dev,
 209                                         "%s: rq[%d] error 0x%x\n",
 210                                         adapter->netdev->name, i,
 211                                         adapter->rqd_start[i].status.error);
 212
 213                 schedule_work(&adapter->work);
 214         }
 215 }
 216
 217 #ifdef __BIG_ENDIAN_BITFIELD
 218 /*
 219  * The device expects the bitfields in shared structures to be written in
 220  * little endian. When CPU is big endian, the following routines are used to
 221  * correctly read and write into ABI.
 222  * The general technique used here is : double word bitfields are defined in
 223  * opposite order for big endian architecture. Then before reading them in
 224  * driver the complete double word is translated using le32_to_cpu. Similarly
 225  * After the driver writes into bitfields, cpu_to_le32 is used to translate the
 226  * double words into required format.
 227  * In order to avoid touching bits in shared structure more than once, temporary
 228  * descriptors are used. These are passed as srcDesc to following functions.
 229  */
 230 static void vmxnet3_RxDescToCPU(const struct Vmxnet3_RxDesc *srcDesc,
 231                                 struct Vmxnet3_RxDesc *dstDesc)
 232 {
 233         u32 *src = (u32 *)srcDesc + 2;
 234         u32 *dst = (u32 *)dstDesc + 2;
 235         dstDesc->addr = le64_to_cpu(srcDesc->addr);
 236         *dst = le32_to_cpu(*src);
 237         dstDesc->ext1 = le32_to_cpu(srcDesc->ext1);
 238 }
 239
 240 static void vmxnet3_TxDescToLe(const struct Vmxnet3_TxDesc *srcDesc,
 241                                struct Vmxnet3_TxDesc *dstDesc)
 242 {
 243         int i;
 244         u32 *src = (u32 *)(srcDesc + 1);
 245         u32 *dst = (u32 *)(dstDesc + 1);
 246
 247         /* Working backwards so that the gen bit is set at the end. */
 248         for (i = 2; i > 0; i--) {
 249                 src--;
 250                 dst--;
 251                 *dst = cpu_to_le32(*src);
 252         }
 253 }
 254
 255
 256 static void vmxnet3_RxCompToCPU(const struct Vmxnet3_RxCompDesc *srcDesc,
 257                                 struct Vmxnet3_RxCompDesc *dstDesc)
 258 {
 259         int i = 0;
 260         u32 *src = (u32 *)srcDesc;
 261         u32 *dst = (u32 *)dstDesc;
 262         for (i = 0; i < sizeof(struct Vmxnet3_RxCompDesc) / sizeof(u32); i++) {
 263                 *dst = le32_to_cpu(*src);
 264                 src++;
 265                 dst++;
 266         }
 267 }
 268
 269
 270 /* Used to read bitfield values from double words. */
 271 static u32 get_bitfield32(const __le32 *bitfield, u32 pos, u32 size)
 272 {
 273         u32 temp = le32_to_cpu(*bitfield);
 274         u32 mask = ((1 << size) - 1) << pos;
 275         temp &= mask;
 276         temp >>= pos;
 277         return temp;
 278 }
 279
 280
 281
 282 #endif  /* __BIG_ENDIAN_BITFIELD */
 283
 284 #ifdef __BIG_ENDIAN_BITFIELD
 285
 286 #   define VMXNET3_TXDESC_GET_GEN(txdesc) get_bitfield32(((const __le32 *) \
 287                         txdesc) + VMXNET3_TXD_GEN_DWORD_SHIFT, \
 288                         VMXNET3_TXD_GEN_SHIFT, VMXNET3_TXD_GEN_SIZE)
 289 #   define VMXNET3_TXDESC_GET_EOP(txdesc) get_bitfield32(((const __le32 *) \
 290                         txdesc) + VMXNET3_TXD_EOP_DWORD_SHIFT, \
 291                         VMXNET3_TXD_EOP_SHIFT, VMXNET3_TXD_EOP_SIZE)
 292 #   define VMXNET3_TCD_GET_GEN(tcd) get_bitfield32(((const __le32 *)tcd) + \
 293                         VMXNET3_TCD_GEN_DWORD_SHIFT, VMXNET3_TCD_GEN_SHIFT, \
 294                         VMXNET3_TCD_GEN_SIZE)
 295 #   define VMXNET3_TCD_GET_TXIDX(tcd) get_bitfield32((const __le32 *)tcd, \
 296                         VMXNET3_TCD_TXIDX_SHIFT, VMXNET3_TCD_TXIDX_SIZE)
 297 #   define vmxnet3_getRxComp(dstrcd, rcd, tmp) do { \
 298                         (dstrcd) = (tmp); \
 299                         vmxnet3_RxCompToCPU((rcd), (tmp)); \
 300                 } while (0)
 301 #   define vmxnet3_getRxDesc(dstrxd, rxd, tmp) do { \
 302                         (dstrxd) = (tmp); \
 303                         vmxnet3_RxDescToCPU((rxd), (tmp)); \
 304                 } while (0)
 305
 306 #else
 307
 308 #   define VMXNET3_TXDESC_GET_GEN(txdesc) ((txdesc)->gen)
 309 #   define VMXNET3_TXDESC_GET_EOP(txdesc) ((txdesc)->eop)
 310 #   define VMXNET3_TCD_GET_GEN(tcd) ((tcd)->gen)
 311 #   define VMXNET3_TCD_GET_TXIDX(tcd) ((tcd)->txdIdx)
 312 #   define vmxnet3_getRxComp(dstrcd, rcd, tmp) (dstrcd) = (rcd)
 313 #   define vmxnet3_getRxDesc(dstrxd, rxd, tmp) (dstrxd) = (rxd)
 314
 315 #endif /* __BIG_ENDIAN_BITFIELD  */
 316
 317
 318 static void
 319 vmxnet3_unmap_tx_buf(struct vmxnet3_tx_buf_info *tbi,
 320                      struct pci_dev *pdev)
 321 {
 322         if (tbi->map_type == VMXNET3_MAP_SINGLE)
 323                 pci_unmap_single(pdev, tbi->dma_addr, tbi->len,
 324                                  PCI_DMA_TODEVICE);
 325         else if (tbi->map_type == VMXNET3_MAP_PAGE)
 326                 pci_unmap_page(pdev, tbi->dma_addr, tbi->len,
 327                                PCI_DMA_TODEVICE);
 328         else
 329                 BUG_ON(tbi->map_type != VMXNET3_MAP_NONE);
 330
 331         tbi->map_type = VMXNET3_MAP_NONE; /* to help debugging */
 332 }
 333
 334
 335 static int
 336 vmxnet3_unmap_pkt(u32 eop_idx, struct vmxnet3_tx_queue *tq,
 337                   struct pci_dev *pdev, struct vmxnet3_adapter *adapter)
 338 {
 339         struct sk_buff *skb;
 340         int entries = 0;
 341
 342         /* no out of order completion */
 343         BUG_ON(tq->buf_info[eop_idx].sop_idx != tq->tx_ring.next2comp);
 344         BUG_ON(VMXNET3_TXDESC_GET_EOP(&(tq->tx_ring.base[eop_idx].txd)) != 1);
 345
 346         skb = tq->buf_info[eop_idx].skb;
 347         BUG_ON(skb == NULL);
 348         tq->buf_info[eop_idx].skb = NULL;
 349
 350         VMXNET3_INC_RING_IDX_ONLY(eop_idx, tq->tx_ring.size);
 351
 352         while (tq->tx_ring.next2comp != eop_idx) {
 353                 vmxnet3_unmap_tx_buf(tq->buf_info + tq->tx_ring.next2comp,
 354                                      pdev);
 355
 356                 /* update next2comp w/o tx_lock. Since we are marking more,
 357                  * instead of less, tx ring entries avail, the worst case is
 358                  * that the tx routine incorrectly re-queues a pkt due to
 359                  * insufficient tx ring entries.
 360                  */
 361                 vmxnet3_cmd_ring_adv_next2comp(&tq->tx_ring);
 362                 entries++;
 363         }
 364
 365         dev_kfree_skb_any(skb);
 366         return entries;
 367 }
 368
 369
 370 static int
 371 vmxnet3_tq_tx_complete(struct vmxnet3_tx_queue *tq,
 372                         struct vmxnet3_adapter *adapter)
 373 {
 374         int completed = 0;
 375         union Vmxnet3_GenericDesc *gdesc;
 376
 377         gdesc = tq->comp_ring.base + tq->comp_ring.next2proc;
 378         while (VMXNET3_TCD_GET_GEN(&gdesc->tcd) == tq->comp_ring.gen) {
 379                 completed += vmxnet3_unmap_pkt(VMXNET3_TCD_GET_TXIDX(
 380                                                &gdesc->tcd), tq, adapter->pdev,
 381                                                adapter);
 382
 383                 vmxnet3_comp_ring_adv_next2proc(&tq->comp_ring);
 384                 gdesc = tq->comp_ring.base + tq->comp_ring.next2proc;
 385         }
 386
 387         if (completed) {
 388                 spin_lock(&tq->tx_lock);
 389                 if (unlikely(vmxnet3_tq_stopped(tq, adapter) &&
 390                              vmxnet3_cmd_ring_desc_avail(&tq->tx_ring) >
 391                              VMXNET3_WAKE_QUEUE_THRESHOLD(tq) &&
 392                              netif_carrier_ok(adapter->netdev))) {
 393                         vmxnet3_tq_wake(tq, adapter);
 394                 }
 395                 spin_unlock(&tq->tx_lock);
 396         }
 397         return completed;
 398 }
 399
 400
 401 static void
 402 vmxnet3_tq_cleanup(struct vmxnet3_tx_queue *tq,
 403                    struct vmxnet3_adapter *adapter)
 404 {
 405         int i;
 406
 407         while (tq->tx_ring.next2comp != tq->tx_ring.next2fill) {
 408                 struct vmxnet3_tx_buf_info *tbi;
 409
 410                 tbi = tq->buf_info + tq->tx_ring.next2comp;
 411
 412                 vmxnet3_unmap_tx_buf(tbi, adapter->pdev);
 413                 if (tbi->skb) {
 414                         dev_kfree_skb_any(tbi->skb);
 415                         tbi->skb = NULL;
 416                 }
 417                 vmxnet3_cmd_ring_adv_next2comp(&tq->tx_ring);
 418         }
 419
 420         /* sanity check, verify all buffers are indeed unmapped and freed */
 421         for (i = 0; i < tq->tx_ring.size; i++) {
 422                 BUG_ON(tq->buf_info[i].skb != NULL ||
 423                        tq->buf_info[i].map_type != VMXNET3_MAP_NONE);
 424         }
 425
 426         tq->tx_ring.gen = VMXNET3_INIT_GEN;
 427         tq->tx_ring.next2fill = tq->tx_ring.next2comp = 0;
 428
 429         tq->comp_ring.gen = VMXNET3_INIT_GEN;
 430         tq->comp_ring.next2proc = 0;
 431 }
 432
 433
 434 static void
 435 vmxnet3_tq_destroy(struct vmxnet3_tx_queue *tq,
 436                    struct vmxnet3_adapter *adapter)
 437 {
 438         if (tq->tx_ring.base) {
 439                 pci_free_consistent(adapter->pdev, tq->tx_ring.size *
 440                                     sizeof(struct Vmxnet3_TxDesc),
 441                                     tq->tx_ring.base, tq->tx_ring.basePA);
 442                 tq->tx_ring.base = NULL;
 443         }
 444         if (tq->data_ring.base) {
 445                 pci_free_consistent(adapter->pdev, tq->data_ring.size *
 446                                     sizeof(struct Vmxnet3_TxDataDesc),
 447                                     tq->data_ring.base, tq->data_ring.basePA);
 448                 tq->data_ring.base = NULL;
 449         }
 450         if (tq->comp_ring.base) {
 451                 pci_free_consistent(adapter->pdev, tq->comp_ring.size *
 452                                     sizeof(struct Vmxnet3_TxCompDesc),
 453                                     tq->comp_ring.base, tq->comp_ring.basePA);
 454                 tq->comp_ring.base = NULL;
 455         }
 456         kfree(tq->buf_info);
 457         tq->buf_info = NULL;
 458 }
 459
 460
 461 /* Destroy all tx queues */
 462 void
 463 vmxnet3_tq_destroy_all(struct vmxnet3_adapter *adapter)
 464 {
 465         int i;
 466
 467         for (i = 0; i < adapter->num_tx_queues; i++)
 468                 vmxnet3_tq_destroy(&adapter->tx_queue[i], adapter);
 469 }
 470
 471
 472 static void
 473 vmxnet3_tq_init(struct vmxnet3_tx_queue *tq,
 474                 struct vmxnet3_adapter *adapter)
 475 {
 476         int i;
 477
 478         /* reset the tx ring contents to 0 and reset the tx ring states */
 479         memset(tq->tx_ring.base, 0, tq->tx_ring.size *
 480                sizeof(struct Vmxnet3_TxDesc));
 481         tq->tx_ring.next2fill = tq->tx_ring.next2comp = 0;
 482         tq->tx_ring.gen = VMXNET3_INIT_GEN;
 483
 484         memset(tq->data_ring.base, 0, tq->data_ring.size *
 485                sizeof(struct Vmxnet3_TxDataDesc));
 486
 487         /* reset the tx comp ring contents to 0 and reset comp ring states */
 488         memset(tq->comp_ring.base, 0, tq->comp_ring.size *
 489                sizeof(struct Vmxnet3_TxCompDesc));
 490         tq->comp_ring.next2proc = 0;
 491         tq->comp_ring.gen = VMXNET3_INIT_GEN;
 492
 493         /* reset the bookkeeping data */
 494         memset(tq->buf_info, 0, sizeof(tq->buf_info[0]) * tq->tx_ring.size);
 495         for (i = 0; i < tq->tx_ring.size; i++)
 496                 tq->buf_info[i].map_type = VMXNET3_MAP_NONE;
 497
 498         /* stats are not reset */
 499 }
 500
 501
 502 static int
 503 vmxnet3_tq_create(struct vmxnet3_tx_queue *tq,
 504                   struct vmxnet3_adapter *adapter)
 505 {
 506         BUG_ON(tq->tx_ring.base || tq->data_ring.base ||
 507                tq->comp_ring.base || tq->buf_info);
 508
 509         tq->tx_ring.base = pci_alloc_consistent(adapter->pdev, tq->tx_ring.size
 510                            * sizeof(struct Vmxnet3_TxDesc),
 511                            &tq->tx_ring.basePA);
 512         if (!tq->tx_ring.base) {
 513                 printk(KERN_ERR "%s: failed to allocate tx ring\n",
 514                        adapter->netdev->name);
 515                 goto err;
 516         }
 517
 518         tq->data_ring.base = pci_alloc_consistent(adapter->pdev,
 519                              tq->data_ring.size *
 520                              sizeof(struct Vmxnet3_TxDataDesc),
 521                              &tq->data_ring.basePA);
 522         if (!tq->data_ring.base) {
 523                 printk(KERN_ERR "%s: failed to allocate data ring\n",
 524                        adapter->netdev->name);
 525                 goto err;
 526         }
 527
 528         tq->comp_ring.base = pci_alloc_consistent(adapter->pdev,
 529                              tq->comp_ring.size *
 530                              sizeof(struct Vmxnet3_TxCompDesc),
 531                              &tq->comp_ring.basePA);
 532         if (!tq->comp_ring.base) {
 533                 printk(KERN_ERR "%s: failed to allocate tx comp ring\n",
 534                        adapter->netdev->name);
 535                 goto err;
 536         }
 537
 538         tq->buf_info = kcalloc(tq->tx_ring.size, sizeof(tq->buf_info[0]),
 539                                GFP_KERNEL);
 540         if (!tq->buf_info)
 541                 goto err;
 542
 543         return 0;
 544
 545 err:
 546         vmxnet3_tq_destroy(tq, adapter);
 547         return -ENOMEM;
 548 }
 549
 550 static void
 551 vmxnet3_tq_cleanup_all(struct vmxnet3_adapter *adapter)
 552 {
 553         int i;
 554
 555         for (i = 0; i < adapter->num_tx_queues; i++)
 556                 vmxnet3_tq_cleanup(&adapter->tx_queue[i], adapter);
 557 }
 558
 559 /*
 560  *    starting from ring->next2fill, allocate rx buffers for the given ring
 561  *    of the rx queue and update the rx desc. stop after @num_to_alloc buffers
 562  *    are allocated or allocation fails
 563  */
 564
 565 static int
 566 vmxnet3_rq_alloc_rx_buf(struct vmxnet3_rx_queue *rq, u32 ring_idx,
 567                         int num_to_alloc, struct vmxnet3_adapter *adapter)
 568 {
 569         int num_allocated = 0;
 570         struct vmxnet3_rx_buf_info *rbi_base = rq->buf_info[ring_idx];
 571         struct vmxnet3_cmd_ring *ring = &rq->rx_ring[ring_idx];
 572         u32 val;
 573
 574         while (num_allocated <= num_to_alloc) {
 575                 struct vmxnet3_rx_buf_info *rbi;
 576                 union Vmxnet3_GenericDesc *gd;
 577
 578                 rbi = rbi_base + ring->next2fill;
 579                 gd = ring->base + ring->next2fill;
 580
 581                 if (rbi->buf_type == VMXNET3_RX_BUF_SKB) {
 582                         if (rbi->skb == NULL) {
 583                                 rbi->skb = dev_alloc_skb(rbi->len +
 584                                                          NET_IP_ALIGN);
 585                                 if (unlikely(rbi->skb == NULL)) {
 586                                         rq->stats.rx_buf_alloc_failure++;
 587                                         break;
 588                                 }
 589                                 rbi->skb->dev = adapter->netdev;
 590
 591                                 skb_reserve(rbi->skb, NET_IP_ALIGN);
 592                                 rbi->dma_addr = pci_map_single(adapter->pdev,
 593                                                 rbi->skb->data, rbi->len,
 594                                                 PCI_DMA_FROMDEVICE);
 595                         } else {
 596                                 /* rx buffer skipped by the device */
 597                         }
 598                         val = VMXNET3_RXD_BTYPE_HEAD << VMXNET3_RXD_BTYPE_SHIFT;
 599                 } else {
 600                         BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_PAGE ||
 601                                rbi->len  != PAGE_SIZE);
 602
 603                         if (rbi->page == NULL) {
 604                                 rbi->page = alloc_page(GFP_ATOMIC);
 605                                 if (unlikely(rbi->page == NULL)) {
 606                                         rq->stats.rx_buf_alloc_failure++;
 607                                         break;
 608                                 }
 609                                 rbi->dma_addr = pci_map_page(adapter->pdev,
 610                                                 rbi->page, 0, PAGE_SIZE,
 611                                                 PCI_DMA_FROMDEVICE);
 612                         } else {
 613                                 /* rx buffers skipped by the device */
 614                         }
 615                         val = VMXNET3_RXD_BTYPE_BODY << VMXNET3_RXD_BTYPE_SHIFT;
 616                 }
 617
 618                 BUG_ON(rbi->dma_addr == 0);
 619                 gd->rxd.addr = cpu_to_le64(rbi->dma_addr);
 620                 gd->dword[2] = cpu_to_le32((!ring->gen << VMXNET3_RXD_GEN_SHIFT)
 621                                            | val | rbi->len);
 622
 623                 /* Fill the last buffer but dont mark it ready, or else the
 624                  * device will think that the queue is full */
 625                 if (num_allocated == num_to_alloc)
 626                         break;
 627
 628                 gd->dword[2] |= cpu_to_le32(ring->gen << VMXNET3_RXD_GEN_SHIFT);
 629                 num_allocated++;
 630                 vmxnet3_cmd_ring_adv_next2fill(ring);
 631         }
 632         rq->uncommitted[ring_idx] += num_allocated;
 633
 634         dev_dbg(&adapter->netdev->dev,
 635                 "alloc_rx_buf: %d allocated, next2fill %u, next2comp "
 636                 "%u, uncommitted %u\n", num_allocated, ring->next2fill,
 637                 ring->next2comp, rq->uncommitted[ring_idx]);
 638
 639         /* so that the device can distinguish a full ring and an empty ring */
 640         BUG_ON(num_allocated != 0 && ring->next2fill == ring->next2comp);
 641
 642         return num_allocated;
 643 }
 644
 645
 646 static void
 647 vmxnet3_append_frag(struct sk_buff *skb, struct Vmxnet3_RxCompDesc *rcd,
 648                     struct vmxnet3_rx_buf_info *rbi)
 649 {
 650         struct skb_frag_struct *frag = skb_shinfo(skb)->frags +
 651                 skb_shinfo(skb)->nr_frags;
 652
 653         BUG_ON(skb_shinfo(skb)->nr_frags >= MAX_SKB_FRAGS);
 654
 655         __skb_frag_set_page(frag, rbi->page);
 656         frag->page_offset = 0;
 657         skb_frag_size_set(frag, rcd->len);
 658         skb->data_len += rcd->len;
 659         skb->truesize += PAGE_SIZE;
 660         skb_shinfo(skb)->nr_frags++;
 661 }
 662
 663
 664 static void
 665 vmxnet3_map_pkt(struct sk_buff *skb, struct vmxnet3_tx_ctx *ctx,
 666                 struct vmxnet3_tx_queue *tq, struct pci_dev *pdev,
 667                 struct vmxnet3_adapter *adapter)
 668 {
 669         u32 dw2, len;
 670         unsigned long buf_offset;
 671         int i;
 672         union Vmxnet3_GenericDesc *gdesc;
 673         struct vmxnet3_tx_buf_info *tbi = NULL;
 674
 675         BUG_ON(ctx->copy_size > skb_headlen(skb));
 676
 677         /* use the previous gen bit for the SOP desc */
 678         dw2 = (tq->tx_ring.gen ^ 0x1) << VMXNET3_TXD_GEN_SHIFT;
 679
 680         ctx->sop_txd = tq->tx_ring.base + tq->tx_ring.next2fill;
 681         gdesc = ctx->sop_txd; /* both loops below can be skipped */
 682
 683         /* no need to map the buffer if headers are copied */
 684         if (ctx->copy_size) {
 685                 ctx->sop_txd->txd.addr = cpu_to_le64(tq->data_ring.basePA +
 686                                         tq->tx_ring.next2fill *
 687                                         sizeof(struct Vmxnet3_TxDataDesc));
 688                 ctx->sop_txd->dword[2] = cpu_to_le32(dw2 | ctx->copy_size);
 689                 ctx->sop_txd->dword[3] = 0;
 690
 691                 tbi = tq->buf_info + tq->tx_ring.next2fill;
 692                 tbi->map_type = VMXNET3_MAP_NONE;
 693
 694                 dev_dbg(&adapter->netdev->dev,
 695                         "txd[%u]: 0x%Lx 0x%x 0x%x\n",
 696                         tq->tx_ring.next2fill,
 697                         le64_to_cpu(ctx->sop_txd->txd.addr),
 698                         ctx->sop_txd->dword[2], ctx->sop_txd->dword[3]);
 699                 vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring);
 700
 701                 /* use the right gen for non-SOP desc */
 702                 dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT;
 703         }
 704
 705         /* linear part can use multiple tx desc if it's big */
 706         len = skb_headlen(skb) - ctx->copy_size;
 707         buf_offset = ctx->copy_size;
 708         while (len) {
 709                 u32 buf_size;
 710
 711                 if (len < VMXNET3_MAX_TX_BUF_SIZE) {
 712                         buf_size = len;
 713                         dw2 |= len;
 714                 } else {
 715                         buf_size = VMXNET3_MAX_TX_BUF_SIZE;
 716                         /* spec says that for TxDesc.len, 0 == 2^14 */
 717                 }
 718
 719                 tbi = tq->buf_info + tq->tx_ring.next2fill;
 720                 tbi->map_type = VMXNET3_MAP_SINGLE;
 721                 tbi->dma_addr = pci_map_single(adapter->pdev,
 722                                 skb->data + buf_offset, buf_size,
 723                                 PCI_DMA_TODEVICE);
 724
 725                 tbi->len = buf_size;
 726
 727                 gdesc = tq->tx_ring.base + tq->tx_ring.next2fill;
 728                 BUG_ON(gdesc->txd.gen == tq->tx_ring.gen);
 729
 730                 gdesc->txd.addr = cpu_to_le64(tbi->dma_addr);
 731                 gdesc->dword[2] = cpu_to_le32(dw2);
 732                 gdesc->dword[3] = 0;
 733
 734                 dev_dbg(&adapter->netdev->dev,
 735                         "txd[%u]: 0x%Lx 0x%x 0x%x\n",
 736                         tq->tx_ring.next2fill, le64_to_cpu(gdesc->txd.addr),
 737                         le32_to_cpu(gdesc->dword[2]), gdesc->dword[3]);
 738                 vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring);
 739                 dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT;
 740
 741                 len -= buf_size;
 742                 buf_offset += buf_size;
 743         }
 744
 745         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
 746                 const struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i];
 747
 748                 tbi = tq->buf_info + tq->tx_ring.next2fill;
 749                 tbi->map_type = VMXNET3_MAP_PAGE;
 750                 tbi->dma_addr = skb_frag_dma_map(&adapter->pdev->dev, frag,
 751                                                  0, skb_frag_size(frag),
 752                                                  DMA_TO_DEVICE);
 753
 754                 tbi->len = skb_frag_size(frag);
 755
 756                 gdesc = tq->tx_ring.base + tq->tx_ring.next2fill;
 757                 BUG_ON(gdesc->txd.gen == tq->tx_ring.gen);
 758
 759                 gdesc->txd.addr = cpu_to_le64(tbi->dma_addr);
 760                 gdesc->dword[2] = cpu_to_le32(dw2 | skb_frag_size(frag));
 761                 gdesc->dword[3] = 0;
 762
 763                 dev_dbg(&adapter->netdev->dev,
 764                         "txd[%u]: 0x%llu %u %u\n",
 765                         tq->tx_ring.next2fill, le64_to_cpu(gdesc->txd.addr),
 766                         le32_to_cpu(gdesc->dword[2]), gdesc->dword[3]);
 767                 vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring);
 768                 dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT;
 769         }
 770
 771         ctx->eop_txd = gdesc;
 772
 773         /* set the last buf_info for the pkt */
 774         tbi->skb = skb;
 775         tbi->sop_idx = ctx->sop_txd - tq->tx_ring.base;
 776 }
 777
 778
 779 /* Init all tx queues */
 780 static void
 781 vmxnet3_tq_init_all(struct vmxnet3_adapter *adapter)
 782 {
 783         int i;
 784
 785         for (i = 0; i < adapter->num_tx_queues; i++)
 786                 vmxnet3_tq_init(&adapter->tx_queue[i], adapter);
 787 }
 788
 789
 790 /*
 791  *    parse and copy relevant protocol headers:
 792  *      For a tso pkt, relevant headers are L2/3/4 including options
 793  *      For a pkt requesting csum offloading, they are L2/3 and may include L4
 794  *      if it's a TCP/UDP pkt
 795  *
 796  * Returns:
 797  *    -1:  error happens during parsing
 798  *     0:  protocol headers parsed, but too big to be copied
 799  *     1:  protocol headers parsed and copied
 800  *
 801  * Other effects:
 802  *    1. related *ctx fields are updated.
 803  *    2. ctx->copy_size is # of bytes copied
 804  *    3. the portion copied is guaranteed to be in the linear part
 805  *
 806  */
 807 static int
 808 vmxnet3_parse_and_copy_hdr(struct sk_buff *skb, struct vmxnet3_tx_queue *tq,
 809                            struct vmxnet3_tx_ctx *ctx,
 810                            struct vmxnet3_adapter *adapter)
 811 {
 812         struct Vmxnet3_TxDataDesc *tdd;
 813
 814         if (ctx->mss) { /* TSO */
 815                 ctx->eth_ip_hdr_size = skb_transport_offset(skb);
 816                 ctx->l4_hdr_size = tcp_hdrlen(skb);
 817                 ctx->copy_size = ctx->eth_ip_hdr_size + ctx->l4_hdr_size;
 818         } else {
 819                 if (skb->ip_summed == CHECKSUM_PARTIAL) {
 820                         ctx->eth_ip_hdr_size = skb_checksum_start_offset(skb);
 821
 822                         if (ctx->ipv4) {
 823                                 const struct iphdr *iph = ip_hdr(skb);
 824
 825                                 if (iph->protocol == IPPROTO_TCP)
 826                                         ctx->l4_hdr_size = tcp_hdrlen(skb);
 827                                 else if (iph->protocol == IPPROTO_UDP)
 828                                         ctx->l4_hdr_size = sizeof(struct udphdr);
 829                                 else
 830                                         ctx->l4_hdr_size = 0;
 831                         } else {
 832                                 /* for simplicity, don't copy L4 headers */
 833                                 ctx->l4_hdr_size = 0;
 834                         }
 835                         ctx->copy_size = min(ctx->eth_ip_hdr_size +
 836                                          ctx->l4_hdr_size, skb->len);
 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 = tcp_hdr(skb);
 874
 875         if (ctx->ipv4) {
 876                 struct iphdr *iph = ip_hdr(skb);
 877
 878                 iph->check = 0;
 879                 tcph->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr, 0,
 880                                                  IPPROTO_TCP, 0);
 881         } else {
 882                 struct ipv6hdr *iph = ipv6_hdr(skb);
 883
 884                 tcph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, 0,
 885                                                IPPROTO_TCP, 0);
 886         }
 887 }
 888
 889
 890 /*
 891  * Transmits a pkt thru a given tq
 892  * Returns:
 893  *    NETDEV_TX_OK:      descriptors are setup successfully
 894  *    NETDEV_TX_OK:      error occurred, the pkt is dropped
 895  *    NETDEV_TX_BUSY:    tx ring is full, queue is stopped
 896  *
 897  * Side-effects:
 898  *    1. tx ring may be changed
 899  *    2. tq stats may be updated accordingly
 900  *    3. shared->txNumDeferred may be updated
 901  */
 902
 903 static int
 904 vmxnet3_tq_xmit(struct sk_buff *skb, struct vmxnet3_tx_queue *tq,
 905                 struct vmxnet3_adapter *adapter, struct net_device *netdev)
 906 {
 907         int ret;
 908         u32 count;
 909         unsigned long flags;
 910         struct vmxnet3_tx_ctx ctx;
 911         union Vmxnet3_GenericDesc *gdesc;
 912 #ifdef __BIG_ENDIAN_BITFIELD
 913         /* Use temporary descriptor to avoid touching bits multiple times */
 914         union Vmxnet3_GenericDesc tempTxDesc;
 915 #endif
 916
 917         /* conservatively estimate # of descriptors to use */
 918         count = VMXNET3_TXD_NEEDED(skb_headlen(skb)) +
 919                 skb_shinfo(skb)->nr_frags + 1;
 920
 921         ctx.ipv4 = (vlan_get_protocol(skb) == cpu_to_be16(ETH_P_IP));
 922
 923         ctx.mss = skb_shinfo(skb)->gso_size;
 924         if (ctx.mss) {
 925                 if (skb_header_cloned(skb)) {
 926                         if (unlikely(pskb_expand_head(skb, 0, 0,
 927                                                       GFP_ATOMIC) != 0)) {
 928                                 tq->stats.drop_tso++;
 929                                 goto drop_pkt;
 930                         }
 931                         tq->stats.copy_skb_header++;
 932                 }
 933                 vmxnet3_prepare_tso(skb, &ctx);
 934         } else {
 935                 if (unlikely(count > VMXNET3_MAX_TXD_PER_PKT)) {
 936
 937                         /* non-tso pkts must not use more than
 938                          * VMXNET3_MAX_TXD_PER_PKT entries
 939                          */
 940                         if (skb_linearize(skb) != 0) {
 941                                 tq->stats.drop_too_many_frags++;
 942                                 goto drop_pkt;
 943                         }
 944                         tq->stats.linearized++;
 945
 946                         /* recalculate the # of descriptors to use */
 947                         count = VMXNET3_TXD_NEEDED(skb_headlen(skb)) + 1;
 948                 }
 949         }
 950
 951         spin_lock_irqsave(&tq->tx_lock, flags);
 952
 953         if (count > vmxnet3_cmd_ring_desc_avail(&tq->tx_ring)) {
 954                 tq->stats.tx_ring_full++;
 955                 dev_dbg(&adapter->netdev->dev,
 956                         "tx queue stopped on %s, next2comp %u"
 957                         " next2fill %u\n", adapter->netdev->name,
 958                         tq->tx_ring.next2comp, tq->tx_ring.next2fill);
 959
 960                 vmxnet3_tq_stop(tq, adapter);
 961                 spin_unlock_irqrestore(&tq->tx_lock, flags);
 962                 return NETDEV_TX_BUSY;
 963         }
 964
 965
 966         ret = vmxnet3_parse_and_copy_hdr(skb, tq, &ctx, adapter);
 967         if (ret >= 0) {
 968                 BUG_ON(ret <= 0 && ctx.copy_size != 0);
 969                 /* hdrs parsed, check against other limits */
 970                 if (ctx.mss) {
 971                         if (unlikely(ctx.eth_ip_hdr_size + ctx.l4_hdr_size >
 972                                      VMXNET3_MAX_TX_BUF_SIZE)) {
 973                                 goto hdr_too_big;
 974                         }
 975                 } else {
 976                         if (skb->ip_summed == CHECKSUM_PARTIAL) {
 977                                 if (unlikely(ctx.eth_ip_hdr_size +
 978                                              skb->csum_offset >
 979                                              VMXNET3_MAX_CSUM_OFFSET)) {
 980                                         goto hdr_too_big;
 981                                 }
 982                         }
 983                 }
 984         } else {
 985                 tq->stats.drop_hdr_inspect_err++;
 986                 goto unlock_drop_pkt;
 987         }
 988
 989         /* fill tx descs related to addr & len */
 990         vmxnet3_map_pkt(skb, &ctx, tq, adapter->pdev, adapter);
 991
 992         /* setup the EOP desc */
 993         ctx.eop_txd->dword[3] = cpu_to_le32(VMXNET3_TXD_CQ | VMXNET3_TXD_EOP);
 994
 995         /* setup the SOP desc */
 996 #ifdef __BIG_ENDIAN_BITFIELD
 997         gdesc = &tempTxDesc;
 998         gdesc->dword[2] = ctx.sop_txd->dword[2];
 999         gdesc->dword[3] = ctx.sop_txd->dword[3];
1000 #else
1001         gdesc = ctx.sop_txd;
1002 #endif
1003         if (ctx.mss) {
1004                 gdesc->txd.hlen = ctx.eth_ip_hdr_size + ctx.l4_hdr_size;
1005                 gdesc->txd.om = VMXNET3_OM_TSO;
1006                 gdesc->txd.msscof = ctx.mss;
1007                 le32_add_cpu(&tq->shared->txNumDeferred, (skb->len -
1008                              gdesc->txd.hlen + ctx.mss - 1) / ctx.mss);
1009         } else {
1010                 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1011                         gdesc->txd.hlen = ctx.eth_ip_hdr_size;
1012                         gdesc->txd.om = VMXNET3_OM_CSUM;
1013                         gdesc->txd.msscof = ctx.eth_ip_hdr_size +
1014                                             skb->csum_offset;
1015                 } else {
1016                         gdesc->txd.om = 0;
1017                         gdesc->txd.msscof = 0;
1018                 }
1019                 le32_add_cpu(&tq->shared->txNumDeferred, 1);
1020         }
1021
1022         if (vlan_tx_tag_present(skb)) {
1023                 gdesc->txd.ti = 1;
1024                 gdesc->txd.tci = vlan_tx_tag_get(skb);
1025         }
1026
1027         /* finally flips the GEN bit of the SOP desc. */
1028         gdesc->dword[2] = cpu_to_le32(le32_to_cpu(gdesc->dword[2]) ^
1029                                                   VMXNET3_TXD_GEN);
1030 #ifdef __BIG_ENDIAN_BITFIELD
1031         /* Finished updating in bitfields of Tx Desc, so write them in original
1032          * place.
1033          */
1034         vmxnet3_TxDescToLe((struct Vmxnet3_TxDesc *)gdesc,
1035                            (struct Vmxnet3_TxDesc *)ctx.sop_txd);
1036         gdesc = ctx.sop_txd;
1037 #endif
1038         dev_dbg(&adapter->netdev->dev,
1039                 "txd[%u]: SOP 0x%Lx 0x%x 0x%x\n",
1040                 (u32)(ctx.sop_txd -
1041                 tq->tx_ring.base), le64_to_cpu(gdesc->txd.addr),
1042                 le32_to_cpu(gdesc->dword[2]), le32_to_cpu(gdesc->dword[3]));
1043
1044         spin_unlock_irqrestore(&tq->tx_lock, flags);
1045
1046         if (le32_to_cpu(tq->shared->txNumDeferred) >=
1047                                         le32_to_cpu(tq->shared->txThreshold)) {
1048                 tq->shared->txNumDeferred = 0;
1049                 VMXNET3_WRITE_BAR0_REG(adapter,
1050                                        VMXNET3_REG_TXPROD + tq->qid * 8,
1051                                        tq->tx_ring.next2fill);
1052         }
1053
1054         return NETDEV_TX_OK;
1055
1056 hdr_too_big:
1057         tq->stats.drop_oversized_hdr++;
1058 unlock_drop_pkt:
1059         spin_unlock_irqrestore(&tq->tx_lock, flags);
1060 drop_pkt:
1061         tq->stats.drop_total++;
1062         dev_kfree_skb(skb);
1063         return NETDEV_TX_OK;
1064 }
1065
1066
1067 static netdev_tx_t
1068 vmxnet3_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1069 {
1070         struct vmxnet3_adapter *adapter = netdev_priv(netdev);
1071
1072                 BUG_ON(skb->queue_mapping > adapter->num_tx_queues);
1073                 return vmxnet3_tq_xmit(skb,
1074                                        &adapter->tx_queue[skb->queue_mapping],
1075                                        adapter, netdev);
1076 }
1077
1078
1079 static void
1080 vmxnet3_rx_csum(struct vmxnet3_adapter *adapter,
1081                 struct sk_buff *skb,
1082                 union Vmxnet3_GenericDesc *gdesc)
1083 {
1084         if (!gdesc->rcd.cnc && adapter->netdev->features & NETIF_F_RXCSUM) {
1085                 /* typical case: TCP/UDP over IP and both csums are correct */
1086                 if ((le32_to_cpu(gdesc->dword[3]) & VMXNET3_RCD_CSUM_OK) ==
1087                                                         VMXNET3_RCD_CSUM_OK) {
1088                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1089                         BUG_ON(!(gdesc->rcd.tcp || gdesc->rcd.udp));
1090                         BUG_ON(!(gdesc->rcd.v4  || gdesc->rcd.v6));
1091                         BUG_ON(gdesc->rcd.frg);
1092                 } else {
1093                         if (gdesc->rcd.csum) {
1094                                 skb->csum = htons(gdesc->rcd.csum);
1095                                 skb->ip_summed = CHECKSUM_PARTIAL;
1096                         } else {
1097                                 skb_checksum_none_assert(skb);
1098                         }
1099                 }
1100         } else {
1101                 skb_checksum_none_assert(skb);
1102         }
1103 }
1104
1105
1106 static void
1107 vmxnet3_rx_error(struct vmxnet3_rx_queue *rq, struct Vmxnet3_RxCompDesc *rcd,
1108                  struct vmxnet3_rx_ctx *ctx,  struct vmxnet3_adapter *adapter)
1109 {
1110         rq->stats.drop_err++;
1111         if (!rcd->fcs)
1112                 rq->stats.drop_fcs++;
1113
1114         rq->stats.drop_total++;
1115
1116         /*
1117          * We do not unmap and chain the rx buffer to the skb.
1118          * We basically pretend this buffer is not used and will be recycled
1119          * by vmxnet3_rq_alloc_rx_buf()
1120          */
1121
1122         /*
1123          * ctx->skb may be NULL if this is the first and the only one
1124          * desc for the pkt
1125          */
1126         if (ctx->skb)
1127                 dev_kfree_skb_irq(ctx->skb);
1128
1129         ctx->skb = NULL;
1130 }
1131
1132
1133 static int
1134 vmxnet3_rq_rx_complete(struct vmxnet3_rx_queue *rq,
1135                        struct vmxnet3_adapter *adapter, int quota)
1136 {
1137         static const u32 rxprod_reg[2] = {
1138                 VMXNET3_REG_RXPROD, VMXNET3_REG_RXPROD2
1139         };
1140         u32 num_rxd = 0;
1141         bool skip_page_frags = false;
1142         struct Vmxnet3_RxCompDesc *rcd;
1143         struct vmxnet3_rx_ctx *ctx = &rq->rx_ctx;
1144 #ifdef __BIG_ENDIAN_BITFIELD
1145         struct Vmxnet3_RxDesc rxCmdDesc;
1146         struct Vmxnet3_RxCompDesc rxComp;
1147 #endif
1148         vmxnet3_getRxComp(rcd, &rq->comp_ring.base[rq->comp_ring.next2proc].rcd,
1149                           &rxComp);
1150         while (rcd->gen == rq->comp_ring.gen) {
1151                 struct vmxnet3_rx_buf_info *rbi;
1152                 struct sk_buff *skb, *new_skb = NULL;
1153                 struct page *new_page = NULL;
1154                 int num_to_alloc;
1155                 struct Vmxnet3_RxDesc *rxd;
1156                 u32 idx, ring_idx;
1157                 struct vmxnet3_cmd_ring *ring = NULL;
1158                 if (num_rxd >= quota) {
1159                         /* we may stop even before we see the EOP desc of
1160                          * the current pkt
1161                          */
1162                         break;
1163                 }
1164                 num_rxd++;
1165                 BUG_ON(rcd->rqID != rq->qid && rcd->rqID != rq->qid2);
1166                 idx = rcd->rxdIdx;
1167                 ring_idx = rcd->rqID < adapter->num_rx_queues ? 0 : 1;
1168                 ring = rq->rx_ring + ring_idx;
1169                 vmxnet3_getRxDesc(rxd, &rq->rx_ring[ring_idx].base[idx].rxd,
1170                                   &rxCmdDesc);
1171                 rbi = rq->buf_info[ring_idx] + idx;
1172
1173                 BUG_ON(rxd->addr != rbi->dma_addr ||
1174                        rxd->len != rbi->len);
1175
1176                 if (unlikely(rcd->eop && rcd->err)) {
1177                         vmxnet3_rx_error(rq, rcd, ctx, adapter);
1178                         goto rcd_done;
1179                 }
1180
1181                 if (rcd->sop) { /* first buf of the pkt */
1182                         BUG_ON(rxd->btype != VMXNET3_RXD_BTYPE_HEAD ||
1183                                rcd->rqID != rq->qid);
1184
1185                         BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_SKB);
1186                         BUG_ON(ctx->skb != NULL || rbi->skb == NULL);
1187
1188                         if (unlikely(rcd->len == 0)) {
1189                                 /* Pretend the rx buffer is skipped. */
1190                                 BUG_ON(!(rcd->sop && rcd->eop));
1191                                 dev_dbg(&adapter->netdev->dev,
1192                                         "rxRing[%u][%u] 0 length\n",
1193                                         ring_idx, idx);
1194                                 goto rcd_done;
1195                         }
1196
1197                         skip_page_frags = false;
1198                         ctx->skb = rbi->skb;
1199                         new_skb = dev_alloc_skb(rbi->len + NET_IP_ALIGN);
1200                         if (new_skb == NULL) {
1201                                 /* Skb allocation failed, do not handover this
1202                                  * skb to stack. Reuse it. Drop the existing pkt
1203                                  */
1204                                 rq->stats.rx_buf_alloc_failure++;
1205                                 ctx->skb = NULL;
1206                                 rq->stats.drop_total++;
1207                                 skip_page_frags = true;
1208                                 goto rcd_done;
1209                         }
1210
1211                         pci_unmap_single(adapter->pdev, rbi->dma_addr, rbi->len,
1212                                          PCI_DMA_FROMDEVICE);
1213
1214                         skb_put(ctx->skb, rcd->len);
1215
1216                         /* Immediate refill */
1217                         new_skb->dev = adapter->netdev;
1218                         skb_reserve(new_skb, NET_IP_ALIGN);
1219                         rbi->skb = new_skb;
1220                         rbi->dma_addr = pci_map_single(adapter->pdev,
1221                                         rbi->skb->data, rbi->len,
1222                                         PCI_DMA_FROMDEVICE);
1223                         rxd->addr = cpu_to_le64(rbi->dma_addr);
1224                         rxd->len = rbi->len;
1225
1226                 } else {
1227                         BUG_ON(ctx->skb == NULL && !skip_page_frags);
1228
1229                         /* non SOP buffer must be type 1 in most cases */
1230                         BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_PAGE);
1231                         BUG_ON(rxd->btype != VMXNET3_RXD_BTYPE_BODY);
1232
1233                         /* If an sop buffer was dropped, skip all
1234                          * following non-sop fragments. They will be reused.
1235                          */
1236                         if (skip_page_frags)
1237                                 goto rcd_done;
1238
1239                         new_page = alloc_page(GFP_ATOMIC);
1240                         if (unlikely(new_page == NULL)) {
1241                                 /* Replacement page frag could not be allocated.
1242                                  * Reuse this page. Drop the pkt and free the
1243                                  * skb which contained this page as a frag. Skip
1244                                  * processing all the following non-sop frags.
1245                                  */
1246                                 rq->stats.rx_buf_alloc_failure++;
1247                                 dev_kfree_skb(ctx->skb);
1248                                 ctx->skb = NULL;
1249                                 skip_page_frags = true;
1250                                 goto rcd_done;
1251                         }
1252
1253                         if (rcd->len) {
1254                                 pci_unmap_page(adapter->pdev,
1255                                                rbi->dma_addr, rbi->len,
1256                                                PCI_DMA_FROMDEVICE);
1257
1258                                 vmxnet3_append_frag(ctx->skb, rcd, rbi);
1259                         }
1260
1261                         /* Immediate refill */
1262                         rbi->page = new_page;
1263                         rbi->dma_addr = pci_map_page(adapter->pdev, rbi->page,
1264                                                      0, PAGE_SIZE,
1265                                                      PCI_DMA_FROMDEVICE);
1266                         rxd->addr = cpu_to_le64(rbi->dma_addr);
1267                         rxd->len = rbi->len;
1268                 }
1269
1270
1271                 skb = ctx->skb;
1272                 if (rcd->eop) {
1273                         skb->len += skb->data_len;
1274
1275                         vmxnet3_rx_csum(adapter, skb,
1276                                         (union Vmxnet3_GenericDesc *)rcd);
1277                         skb->protocol = eth_type_trans(skb, adapter->netdev);
1278
1279                         if (unlikely(rcd->ts))
1280                                 __vlan_hwaccel_put_tag(skb, rcd->tci);
1281
1282                         if (adapter->netdev->features & NETIF_F_LRO)
1283                                 netif_receive_skb(skb);
1284                         else
1285                                 napi_gro_receive(&rq->napi, skb);
1286
1287                         ctx->skb = NULL;
1288                 }
1289
1290 rcd_done:
1291                 /* device may have skipped some rx descs */
1292                 ring->next2comp = idx;
1293                 num_to_alloc = vmxnet3_cmd_ring_desc_avail(ring);
1294                 ring = rq->rx_ring + ring_idx;
1295                 while (num_to_alloc) {
1296                         vmxnet3_getRxDesc(rxd, &ring->base[ring->next2fill].rxd,
1297                                           &rxCmdDesc);
1298                         BUG_ON(!rxd->addr);
1299
1300                         /* Recv desc is ready to be used by the device */
1301                         rxd->gen = ring->gen;
1302                         vmxnet3_cmd_ring_adv_next2fill(ring);
1303                         num_to_alloc--;
1304                 }
1305
1306                 /* if needed, update the register */
1307                 if (unlikely(rq->shared->updateRxProd)) {
1308                         VMXNET3_WRITE_BAR0_REG(adapter,
1309                                 rxprod_reg[ring_idx] + rq->qid * 8,
1310                                 ring->next2fill);
1311                         rq->uncommitted[ring_idx] = 0;
1312                 }
1313
1314                 vmxnet3_comp_ring_adv_next2proc(&rq->comp_ring);
1315                 vmxnet3_getRxComp(rcd,
1316                      &rq->comp_ring.base[rq->comp_ring.next2proc].rcd, &rxComp);
1317         }
1318
1319         return num_rxd;
1320 }
1321
1322
1323 static void
1324 vmxnet3_rq_cleanup(struct vmxnet3_rx_queue *rq,
1325                    struct vmxnet3_adapter *adapter)
1326 {
1327         u32 i, ring_idx;
1328         struct Vmxnet3_RxDesc *rxd;
1329
1330         for (ring_idx = 0; ring_idx < 2; ring_idx++) {
1331                 for (i = 0; i < rq->rx_ring[ring_idx].size; i++) {
1332 #ifdef __BIG_ENDIAN_BITFIELD
1333                         struct Vmxnet3_RxDesc rxDesc;
1334 #endif
1335                         vmxnet3_getRxDesc(rxd,
1336                                 &rq->rx_ring[ring_idx].base[i].rxd, &rxDesc);
1337
1338                         if (rxd->btype == VMXNET3_RXD_BTYPE_HEAD &&
1339                                         rq->buf_info[ring_idx][i].skb) {
1340                                 pci_unmap_single(adapter->pdev, rxd->addr,
1341                                                  rxd->len, PCI_DMA_FROMDEVICE);
1342                                 dev_kfree_skb(rq->buf_info[ring_idx][i].skb);
1343                                 rq->buf_info[ring_idx][i].skb = NULL;
1344                         } else if (rxd->btype == VMXNET3_RXD_BTYPE_BODY &&
1345                                         rq->buf_info[ring_idx][i].page) {
1346                                 pci_unmap_page(adapter->pdev, rxd->addr,
1347                                                rxd->len, PCI_DMA_FROMDEVICE);
1348                                 put_page(rq->buf_info[ring_idx][i].page);
1349                                 rq->buf_info[ring_idx][i].page = NULL;
1350                         }
1351                 }
1352
1353                 rq->rx_ring[ring_idx].gen = VMXNET3_INIT_GEN;
1354                 rq->rx_ring[ring_idx].next2fill =
1355                                         rq->rx_ring[ring_idx].next2comp = 0;
1356                 rq->uncommitted[ring_idx] = 0;
1357         }
1358
1359         rq->comp_ring.gen = VMXNET3_INIT_GEN;
1360         rq->comp_ring.next2proc = 0;
1361 }
1362
1363
1364 static void
1365 vmxnet3_rq_cleanup_all(struct vmxnet3_adapter *adapter)
1366 {
1367         int i;
1368
1369         for (i = 0; i < adapter->num_rx_queues; i++)
1370                 vmxnet3_rq_cleanup(&adapter->rx_queue[i], adapter);
1371 }
1372
1373
1374 void vmxnet3_rq_destroy(struct vmxnet3_rx_queue *rq,
1375                         struct vmxnet3_adapter *adapter)
1376 {
1377         int i;
1378         int j;
1379
1380         /* all rx buffers must have already been freed */
1381         for (i = 0; i < 2; i++) {
1382                 if (rq->buf_info[i]) {
1383                         for (j = 0; j < rq->rx_ring[i].size; j++)
1384                                 BUG_ON(rq->buf_info[i][j].page != NULL);
1385                 }
1386         }
1387
1388
1389         kfree(rq->buf_info[0]);
1390
1391         for (i = 0; i < 2; i++) {
1392                 if (rq->rx_ring[i].base) {
1393                         pci_free_consistent(adapter->pdev, rq->rx_ring[i].size
1394                                             * sizeof(struct Vmxnet3_RxDesc),
1395                                             rq->rx_ring[i].base,
1396                                             rq->rx_ring[i].basePA);
1397                         rq->rx_ring[i].base = NULL;
1398                 }
1399                 rq->buf_info[i] = NULL;
1400         }
1401
1402         if (rq->comp_ring.base) {
1403                 pci_free_consistent(adapter->pdev, rq->comp_ring.size *
1404                                     sizeof(struct Vmxnet3_RxCompDesc),
1405                                     rq->comp_ring.base, rq->comp_ring.basePA);
1406                 rq->comp_ring.base = NULL;
1407         }
1408 }
1409
1410
1411 static int
1412 vmxnet3_rq_init(struct vmxnet3_rx_queue *rq,
1413                 struct vmxnet3_adapter  *adapter)
1414 {
1415         int i;
1416
1417         /* initialize buf_info */
1418         for (i = 0; i < rq->rx_ring[0].size; i++) {
1419
1420                 /* 1st buf for a pkt is skbuff */
1421                 if (i % adapter->rx_buf_per_pkt == 0) {
1422                         rq->buf_info[0][i].buf_type = VMXNET3_RX_BUF_SKB;
1423                         rq->buf_info[0][i].len = adapter->skb_buf_size;
1424                 } else { /* subsequent bufs for a pkt is frag */
1425                         rq->buf_info[0][i].buf_type = VMXNET3_RX_BUF_PAGE;
1426                         rq->buf_info[0][i].len = PAGE_SIZE;
1427                 }
1428         }
1429         for (i = 0; i < rq->rx_ring[1].size; i++) {
1430                 rq->buf_info[1][i].buf_type = VMXNET3_RX_BUF_PAGE;
1431                 rq->buf_info[1][i].len = PAGE_SIZE;
1432         }
1433
1434         /* reset internal state and allocate buffers for both rings */
1435         for (i = 0; i < 2; i++) {
1436                 rq->rx_ring[i].next2fill = rq->rx_ring[i].next2comp = 0;
1437                 rq->uncommitted[i] = 0;
1438
1439                 memset(rq->rx_ring[i].base, 0, rq->rx_ring[i].size *
1440                        sizeof(struct Vmxnet3_RxDesc));
1441                 rq->rx_ring[i].gen = VMXNET3_INIT_GEN;
1442         }
1443         if (vmxnet3_rq_alloc_rx_buf(rq, 0, rq->rx_ring[0].size - 1,
1444                                     adapter) == 0) {
1445                 /* at least has 1 rx buffer for the 1st ring */
1446                 return -ENOMEM;
1447         }
1448         vmxnet3_rq_alloc_rx_buf(rq, 1, rq->rx_ring[1].size - 1, adapter);
1449
1450         /* reset the comp ring */
1451         rq->comp_ring.next2proc = 0;
1452         memset(rq->comp_ring.base, 0, rq->comp_ring.size *
1453                sizeof(struct Vmxnet3_RxCompDesc));
1454         rq->comp_ring.gen = VMXNET3_INIT_GEN;
1455
1456         /* reset rxctx */
1457         rq->rx_ctx.skb = NULL;
1458
1459         /* stats are not reset */
1460         return 0;
1461 }
1462
1463
1464 static int
1465 vmxnet3_rq_init_all(struct vmxnet3_adapter *adapter)
1466 {
1467         int i, err = 0;
1468
1469         for (i = 0; i < adapter->num_rx_queues; i++) {
1470                 err = vmxnet3_rq_init(&adapter->rx_queue[i], adapter);
1471                 if (unlikely(err)) {
1472                         dev_err(&adapter->netdev->dev, "%s: failed to "
1473                                 "initialize rx queue%i\n",
1474                                 adapter->netdev->name, i);
1475                         break;
1476                 }
1477         }
1478         return err;
1479
1480 }
1481
1482
1483 static int
1484 vmxnet3_rq_create(struct vmxnet3_rx_queue *rq, struct vmxnet3_adapter *adapter)
1485 {
1486         int i;
1487         size_t sz;
1488         struct vmxnet3_rx_buf_info *bi;
1489
1490         for (i = 0; i < 2; i++) {
1491
1492                 sz = rq->rx_ring[i].size * sizeof(struct Vmxnet3_RxDesc);
1493                 rq->rx_ring[i].base = pci_alloc_consistent(adapter->pdev, sz,
1494                                                         &rq->rx_ring[i].basePA);
1495                 if (!rq->rx_ring[i].base) {
1496                         printk(KERN_ERR "%s: failed to allocate rx ring %d\n",
1497                                adapter->netdev->name, i);
1498                         goto err;
1499                 }
1500         }
1501
1502         sz = rq->comp_ring.size * sizeof(struct Vmxnet3_RxCompDesc);
1503         rq->comp_ring.base = pci_alloc_consistent(adapter->pdev, sz,
1504                                                   &rq->comp_ring.basePA);
1505         if (!rq->comp_ring.base) {
1506                 printk(KERN_ERR "%s: failed to allocate rx comp ring\n",
1507                        adapter->netdev->name);
1508                 goto err;
1509         }
1510
1511         sz = sizeof(struct vmxnet3_rx_buf_info) * (rq->rx_ring[0].size +
1512                                                    rq->rx_ring[1].size);
1513         bi = kzalloc(sz, GFP_KERNEL);
1514         if (!bi)
1515                 goto err;
1516
1517         rq->buf_info[0] = bi;
1518         rq->buf_info[1] = bi + rq->rx_ring[0].size;
1519
1520         return 0;
1521
1522 err:
1523         vmxnet3_rq_destroy(rq, adapter);
1524         return -ENOMEM;
1525 }
1526
1527
1528 static int
1529 vmxnet3_rq_create_all(struct vmxnet3_adapter *adapter)
1530 {
1531         int i, err = 0;
1532
1533         for (i = 0; i < adapter->num_rx_queues; i++) {
1534                 err = vmxnet3_rq_create(&adapter->rx_queue[i], adapter);
1535                 if (unlikely(err)) {
1536                         dev_err(&adapter->netdev->dev,
1537                                 "%s: failed to create rx queue%i\n",
1538                                 adapter->netdev->name, i);
1539                         goto err_out;
1540                 }
1541         }
1542         return err;
1543 err_out:
1544         vmxnet3_rq_destroy_all(adapter);
1545         return err;
1546
1547 }
1548
1549 /* Multiple queue aware polling function for tx and rx */
1550
1551 static int
1552 vmxnet3_do_poll(struct vmxnet3_adapter *adapter, int budget)
1553 {
1554         int rcd_done = 0, i;
1555         if (unlikely(adapter->shared->ecr))
1556                 vmxnet3_process_events(adapter);
1557         for (i = 0; i < adapter->num_tx_queues; i++)
1558                 vmxnet3_tq_tx_complete(&adapter->tx_queue[i], adapter);
1559
1560         for (i = 0; i < adapter->num_rx_queues; i++)
1561                 rcd_done += vmxnet3_rq_rx_complete(&adapter->rx_queue[i],
1562                                                    adapter, budget);
1563         return rcd_done;
1564 }
1565
1566
1567 static int
1568 vmxnet3_poll(struct napi_struct *napi, int budget)
1569 {
1570         struct vmxnet3_rx_queue *rx_queue = container_of(napi,
1571                                           struct vmxnet3_rx_queue, napi);
1572         int rxd_done;
1573
1574         rxd_done = vmxnet3_do_poll(rx_queue->adapter, budget);
1575
1576         if (rxd_done < budget) {
1577                 napi_complete(napi);
1578                 vmxnet3_enable_all_intrs(rx_queue->adapter);
1579         }
1580         return rxd_done;
1581 }
1582
1583 /*
1584  * NAPI polling function for MSI-X mode with multiple Rx queues
1585  * Returns the # of the NAPI credit consumed (# of rx descriptors processed)
1586  */
1587
1588 static int
1589 vmxnet3_poll_rx_only(struct napi_struct *napi, int budget)
1590 {
1591         struct vmxnet3_rx_queue *rq = container_of(napi,
1592                                                 struct vmxnet3_rx_queue, napi);
1593         struct vmxnet3_adapter *adapter = rq->adapter;
1594         int rxd_done;
1595
1596         /* When sharing interrupt with corresponding tx queue, process
1597          * tx completions in that queue as well
1598          */
1599         if (adapter->share_intr == VMXNET3_INTR_BUDDYSHARE) {
1600                 struct vmxnet3_tx_queue *tq =
1601                                 &adapter->tx_queue[rq - adapter->rx_queue];
1602                 vmxnet3_tq_tx_complete(tq, adapter);
1603         }
1604
1605         rxd_done = vmxnet3_rq_rx_complete(rq, adapter, budget);
1606
1607         if (rxd_done < budget) {
1608                 napi_complete(napi);
1609                 vmxnet3_enable_intr(adapter, rq->comp_ring.intr_idx);
1610         }
1611         return rxd_done;
1612 }
1613
1614
1615 #ifdef CONFIG_PCI_MSI
1616
1617 /*
1618  * Handle completion interrupts on tx queues
1619  * Returns whether or not the intr is handled
1620  */
1621
1622 static irqreturn_t
1623 vmxnet3_msix_tx(int irq, void *data)
1624 {
1625         struct vmxnet3_tx_queue *tq = data;
1626         struct vmxnet3_adapter *adapter = tq->adapter;
1627
1628         if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
1629                 vmxnet3_disable_intr(adapter, tq->comp_ring.intr_idx);
1630
1631         /* Handle the case where only one irq is allocate for all tx queues */
1632         if (adapter->share_intr == VMXNET3_INTR_TXSHARE) {
1633                 int i;
1634                 for (i = 0; i < adapter->num_tx_queues; i++) {
1635                         struct vmxnet3_tx_queue *txq = &adapter->tx_queue[i];
1636                         vmxnet3_tq_tx_complete(txq, adapter);
1637                 }
1638         } else {
1639                 vmxnet3_tq_tx_complete(tq, adapter);
1640         }
1641         vmxnet3_enable_intr(adapter, tq->comp_ring.intr_idx);
1642
1643         return IRQ_HANDLED;
1644 }
1645
1646
1647 /*
1648  * Handle completion interrupts on rx queues. Returns whether or not the
1649  * intr is handled
1650  */
1651
1652 static irqreturn_t
1653 vmxnet3_msix_rx(int irq, void *data)
1654 {
1655         struct vmxnet3_rx_queue *rq = data;
1656         struct vmxnet3_adapter *adapter = rq->adapter;
1657
1658         /* disable intr if needed */
1659         if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
1660                 vmxnet3_disable_intr(adapter, rq->comp_ring.intr_idx);
1661         napi_schedule(&rq->napi);
1662
1663         return IRQ_HANDLED;
1664 }
1665
1666 /*
1667  *----------------------------------------------------------------------------
1668  *
1669  * vmxnet3_msix_event --
1670  *
1671  *    vmxnet3 msix event intr handler
1672  *
1673  * Result:
1674  *    whether or not the intr is handled
1675  *
1676  *----------------------------------------------------------------------------
1677  */
1678
1679 static irqreturn_t
1680 vmxnet3_msix_event(int irq, void *data)
1681 {
1682         struct net_device *dev = data;
1683         struct vmxnet3_adapter *adapter = netdev_priv(dev);
1684
1685         /* disable intr if needed */
1686         if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
1687                 vmxnet3_disable_intr(adapter, adapter->intr.event_intr_idx);
1688
1689         if (adapter->shared->ecr)
1690                 vmxnet3_process_events(adapter);
1691
1692         vmxnet3_enable_intr(adapter, adapter->intr.event_intr_idx);
1693
1694         return IRQ_HANDLED;
1695 }
1696
1697 #endif /* CONFIG_PCI_MSI  */
1698
1699
1700 /* Interrupt handler for vmxnet3  */
1701 static irqreturn_t
1702 vmxnet3_intr(int irq, void *dev_id)
1703 {
1704         struct net_device *dev = dev_id;
1705         struct vmxnet3_adapter *adapter = netdev_priv(dev);
1706
1707         if (adapter->intr.type == VMXNET3_IT_INTX) {
1708                 u32 icr = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_ICR);
1709                 if (unlikely(icr == 0))
1710                         /* not ours */
1711                         return IRQ_NONE;
1712         }
1713
1714
1715         /* disable intr if needed */
1716         if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
1717                 vmxnet3_disable_all_intrs(adapter);
1718
1719         napi_schedule(&adapter->rx_queue[0].napi);
1720
1721         return IRQ_HANDLED;
1722 }
1723
1724 #ifdef CONFIG_NET_POLL_CONTROLLER
1725
1726 /* netpoll callback. */
1727 static void
1728 vmxnet3_netpoll(struct net_device *netdev)
1729 {
1730         struct vmxnet3_adapter *adapter = netdev_priv(netdev);
1731
1732         if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
1733                 vmxnet3_disable_all_intrs(adapter);
1734
1735         vmxnet3_do_poll(adapter, adapter->rx_queue[0].rx_ring[0].size);
1736         vmxnet3_enable_all_intrs(adapter);
1737
1738 }
1739 #endif  /* CONFIG_NET_POLL_CONTROLLER */
1740
1741 static int
1742 vmxnet3_request_irqs(struct vmxnet3_adapter *adapter)
1743 {
1744         struct vmxnet3_intr *intr = &adapter->intr;
1745         int err = 0, i;
1746         int vector = 0;
1747
1748 #ifdef CONFIG_PCI_MSI
1749         if (adapter->intr.type == VMXNET3_IT_MSIX) {
1750                 for (i = 0; i < adapter->num_tx_queues; i++) {
1751                         if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE) {
1752                                 sprintf(adapter->tx_queue[i].name, "%s-tx-%d",
1753                                         adapter->netdev->name, vector);
1754                                 err = request_irq(
1755                                               intr->msix_entries[vector].vector,
1756                                               vmxnet3_msix_tx, 0,
1757                                               adapter->tx_queue[i].name,
1758                                               &adapter->tx_queue[i]);
1759                         } else {
1760                                 sprintf(adapter->tx_queue[i].name, "%s-rxtx-%d",
1761                                         adapter->netdev->name, vector);
1762                         }
1763                         if (err) {
1764                                 dev_err(&adapter->netdev->dev,
1765                                         "Failed to request irq for MSIX, %s, "
1766                                         "error %d\n",
1767                                         adapter->tx_queue[i].name, err);
1768                                 return err;
1769                         }
1770
1771                         /* Handle the case where only 1 MSIx was allocated for
1772                          * all tx queues */
1773                         if (adapter->share_intr == VMXNET3_INTR_TXSHARE) {
1774                                 for (; i < adapter->num_tx_queues; i++)
1775                                         adapter->tx_queue[i].comp_ring.intr_idx
1776                                                                 = vector;
1777                                 vector++;
1778                                 break;
1779                         } else {
1780                                 adapter->tx_queue[i].comp_ring.intr_idx
1781                                                                 = vector++;
1782                         }
1783                 }
1784                 if (adapter->share_intr == VMXNET3_INTR_BUDDYSHARE)
1785                         vector = 0;
1786
1787                 for (i = 0; i < adapter->num_rx_queues; i++) {
1788                         if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE)
1789                                 sprintf(adapter->rx_queue[i].name, "%s-rx-%d",
1790                                         adapter->netdev->name, vector);
1791                         else
1792                                 sprintf(adapter->rx_queue[i].name, "%s-rxtx-%d",
1793                                         adapter->netdev->name, vector);
1794                         err = request_irq(intr->msix_entries[vector].vector,
1795                                           vmxnet3_msix_rx, 0,
1796                                           adapter->rx_queue[i].name,
1797                                           &(adapter->rx_queue[i]));
1798                         if (err) {
1799                                 printk(KERN_ERR "Failed to request irq for MSIX"
1800                                        ", %s, error %d\n",
1801                                        adapter->rx_queue[i].name, err);
1802                                 return err;
1803                         }
1804
1805                         adapter->rx_queue[i].comp_ring.intr_idx = vector++;
1806                 }
1807
1808                 sprintf(intr->event_msi_vector_name, "%s-event-%d",
1809                         adapter->netdev->name, vector);
1810                 err = request_irq(intr->msix_entries[vector].vector,
1811                                   vmxnet3_msix_event, 0,
1812                                   intr->event_msi_vector_name, adapter->netdev);
1813                 intr->event_intr_idx = vector;
1814
1815         } else if (intr->type == VMXNET3_IT_MSI) {
1816                 adapter->num_rx_queues = 1;
1817                 err = request_irq(adapter->pdev->irq, vmxnet3_intr, 0,
1818                                   adapter->netdev->name, adapter->netdev);
1819         } else {
1820 #endif
1821                 adapter->num_rx_queues = 1;
1822                 err = request_irq(adapter->pdev->irq, vmxnet3_intr,
1823                                   IRQF_SHARED, adapter->netdev->name,
1824                                   adapter->netdev);
1825 #ifdef CONFIG_PCI_MSI
1826         }
1827 #endif
1828         intr->num_intrs = vector + 1;
1829         if (err) {
1830                 printk(KERN_ERR "Failed to request irq %s (intr type:%d), error"
1831                        ":%d\n", adapter->netdev->name, intr->type, err);
1832         } else {
1833                 /* Number of rx queues will not change after this */
1834                 for (i = 0; i < adapter->num_rx_queues; i++) {
1835                         struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i];
1836                         rq->qid = i;
1837                         rq->qid2 = i + adapter->num_rx_queues;
1838                 }
1839
1840
1841
1842                 /* init our intr settings */
1843                 for (i = 0; i < intr->num_intrs; i++)
1844                         intr->mod_levels[i] = UPT1_IML_ADAPTIVE;
1845                 if (adapter->intr.type != VMXNET3_IT_MSIX) {
1846                         adapter->intr.event_intr_idx = 0;
1847                         for (i = 0; i < adapter->num_tx_queues; i++)
1848                                 adapter->tx_queue[i].comp_ring.intr_idx = 0;
1849                         adapter->rx_queue[0].comp_ring.intr_idx = 0;
1850                 }
1851
1852                 printk(KERN_INFO "%s: intr type %u, mode %u, %u vectors "
1853                        "allocated\n", adapter->netdev->name, intr->type,
1854                        intr->mask_mode, intr->num_intrs);
1855         }
1856
1857         return err;
1858 }
1859
1860
1861 static void
1862 vmxnet3_free_irqs(struct vmxnet3_adapter *adapter)
1863 {
1864         struct vmxnet3_intr *intr = &adapter->intr;
1865         BUG_ON(intr->type == VMXNET3_IT_AUTO || intr->num_intrs <= 0);
1866
1867         switch (intr->type) {
1868 #ifdef CONFIG_PCI_MSI
1869         case VMXNET3_IT_MSIX:
1870         {
1871                 int i, vector = 0;
1872
1873                 if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE) {
1874                         for (i = 0; i < adapter->num_tx_queues; i++) {
1875                                 free_irq(intr->msix_entries[vector++].vector,
1876                                          &(adapter->tx_queue[i]));
1877                                 if (adapter->share_intr == VMXNET3_INTR_TXSHARE)
1878                                         break;
1879                         }
1880                 }
1881
1882                 for (i = 0; i < adapter->num_rx_queues; i++) {
1883                         free_irq(intr->msix_entries[vector++].vector,
1884                                  &(adapter->rx_queue[i]));
1885                 }
1886
1887                 free_irq(intr->msix_entries[vector].vector,
1888                          adapter->netdev);
1889                 BUG_ON(vector >= intr->num_intrs);
1890                 break;
1891         }
1892 #endif
1893         case VMXNET3_IT_MSI:
1894                 free_irq(adapter->pdev->irq, adapter->netdev);
1895                 break;
1896         case VMXNET3_IT_INTX:
1897                 free_irq(adapter->pdev->irq, adapter->netdev);
1898                 break;
1899         default:
1900                 BUG_ON(true);
1901         }
1902 }
1903
1904
1905 static void
1906 vmxnet3_restore_vlan(struct vmxnet3_adapter *adapter)
1907 {
1908         u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
1909         u16 vid;
1910
1911         /* allow untagged pkts */
1912         VMXNET3_SET_VFTABLE_ENTRY(vfTable, 0);
1913
1914         for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
1915                 VMXNET3_SET_VFTABLE_ENTRY(vfTable, vid);
1916 }
1917
1918
1919 static int
1920 vmxnet3_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
1921 {
1922         struct vmxnet3_adapter *adapter = netdev_priv(netdev);
1923
1924         if (!(netdev->flags & IFF_PROMISC)) {
1925                 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
1926                 unsigned long flags;
1927
1928                 VMXNET3_SET_VFTABLE_ENTRY(vfTable, vid);
1929                 spin_lock_irqsave(&adapter->cmd_lock, flags);
1930                 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
1931                                        VMXNET3_CMD_UPDATE_VLAN_FILTERS);
1932                 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
1933         }
1934
1935         set_bit(vid, adapter->active_vlans);
1936
1937         return 0;
1938 }
1939
1940
1941 static int
1942 vmxnet3_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
1943 {
1944         struct vmxnet3_adapter *adapter = netdev_priv(netdev);
1945
1946         if (!(netdev->flags & IFF_PROMISC)) {
1947                 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
1948                 unsigned long flags;
1949
1950                 VMXNET3_CLEAR_VFTABLE_ENTRY(vfTable, vid);
1951                 spin_lock_irqsave(&adapter->cmd_lock, flags);
1952                 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
1953                                        VMXNET3_CMD_UPDATE_VLAN_FILTERS);
1954                 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
1955         }
1956
1957         clear_bit(vid, adapter->active_vlans);
1958
1959         return 0;
1960 }
1961
1962
1963 static u8 *
1964 vmxnet3_copy_mc(struct net_device *netdev)
1965 {
1966         u8 *buf = NULL;
1967         u32 sz = netdev_mc_count(netdev) * ETH_ALEN;
1968
1969         /* struct Vmxnet3_RxFilterConf.mfTableLen is u16. */
1970         if (sz <= 0xffff) {
1971                 /* We may be called with BH disabled */
1972                 buf = kmalloc(sz, GFP_ATOMIC);
1973                 if (buf) {
1974                         struct netdev_hw_addr *ha;
1975                         int i = 0;
1976
1977                         netdev_for_each_mc_addr(ha, netdev)
1978                                 memcpy(buf + i++ * ETH_ALEN, ha->addr,
1979                                        ETH_ALEN);
1980                 }
1981         }
1982         return buf;
1983 }
1984
1985
1986 static void
1987 vmxnet3_set_mc(struct net_device *netdev)
1988 {
1989         struct vmxnet3_adapter *adapter = netdev_priv(netdev);
1990         unsigned long flags;
1991         struct Vmxnet3_RxFilterConf *rxConf =
1992                                         &adapter->shared->devRead.rxFilterConf;
1993         u8 *new_table = NULL;
1994         u32 new_mode = VMXNET3_RXM_UCAST;
1995
1996         if (netdev->flags & IFF_PROMISC) {
1997                 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
1998                 memset(vfTable, 0, VMXNET3_VFT_SIZE * sizeof(*vfTable));
1999
2000                 new_mode |= VMXNET3_RXM_PROMISC;
2001         } else {
2002                 vmxnet3_restore_vlan(adapter);
2003         }
2004
2005         if (netdev->flags & IFF_BROADCAST)
2006                 new_mode |= VMXNET3_RXM_BCAST;
2007
2008         if (netdev->flags & IFF_ALLMULTI)
2009                 new_mode |= VMXNET3_RXM_ALL_MULTI;
2010         else
2011                 if (!netdev_mc_empty(netdev)) {
2012                         new_table = vmxnet3_copy_mc(netdev);
2013                         if (new_table) {
2014                                 new_mode |= VMXNET3_RXM_MCAST;
2015                                 rxConf->mfTableLen = cpu_to_le16(
2016                                         netdev_mc_count(netdev) * ETH_ALEN);
2017                                 rxConf->mfTablePA = cpu_to_le64(virt_to_phys(
2018                                                     new_table));
2019                         } else {
2020                                 printk(KERN_INFO "%s: failed to copy mcast list"
2021                                        ", setting ALL_MULTI\n", netdev->name);
2022                                 new_mode |= VMXNET3_RXM_ALL_MULTI;
2023                         }
2024                 }
2025
2026
2027         if (!(new_mode & VMXNET3_RXM_MCAST)) {
2028                 rxConf->mfTableLen = 0;
2029                 rxConf->mfTablePA = 0;
2030         }
2031
2032         spin_lock_irqsave(&adapter->cmd_lock, flags);
2033         if (new_mode != rxConf->rxMode) {
2034                 rxConf->rxMode = cpu_to_le32(new_mode);
2035                 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2036                                        VMXNET3_CMD_UPDATE_RX_MODE);
2037                 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2038                                        VMXNET3_CMD_UPDATE_VLAN_FILTERS);
2039         }
2040
2041         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2042                                VMXNET3_CMD_UPDATE_MAC_FILTERS);
2043         spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2044
2045         kfree(new_table);
2046 }
2047
2048 void
2049 vmxnet3_rq_destroy_all(struct vmxnet3_adapter *adapter)
2050 {
2051         int i;
2052
2053         for (i = 0; i < adapter->num_rx_queues; i++)
2054                 vmxnet3_rq_destroy(&adapter->rx_queue[i], adapter);
2055 }
2056
2057
2058 /*
2059  *   Set up driver_shared based on settings in adapter.
2060  */
2061
2062 static void
2063 vmxnet3_setup_driver_shared(struct vmxnet3_adapter *adapter)
2064 {
2065         struct Vmxnet3_DriverShared *shared = adapter->shared;
2066         struct Vmxnet3_DSDevRead *devRead = &shared->devRead;
2067         struct Vmxnet3_TxQueueConf *tqc;
2068         struct Vmxnet3_RxQueueConf *rqc;
2069         int i;
2070
2071         memset(shared, 0, sizeof(*shared));
2072
2073         /* driver settings */
2074         shared->magic = cpu_to_le32(VMXNET3_REV1_MAGIC);
2075         devRead->misc.driverInfo.version = cpu_to_le32(
2076                                                 VMXNET3_DRIVER_VERSION_NUM);
2077         devRead->misc.driverInfo.gos.gosBits = (sizeof(void *) == 4 ?
2078                                 VMXNET3_GOS_BITS_32 : VMXNET3_GOS_BITS_64);
2079         devRead->misc.driverInfo.gos.gosType = VMXNET3_GOS_TYPE_LINUX;
2080         *((u32 *)&devRead->misc.driverInfo.gos) = cpu_to_le32(
2081                                 *((u32 *)&devRead->misc.driverInfo.gos));
2082         devRead->misc.driverInfo.vmxnet3RevSpt = cpu_to_le32(1);
2083         devRead->misc.driverInfo.uptVerSpt = cpu_to_le32(1);
2084
2085         devRead->misc.ddPA = cpu_to_le64(virt_to_phys(adapter));
2086         devRead->misc.ddLen = cpu_to_le32(sizeof(struct vmxnet3_adapter));
2087
2088         /* set up feature flags */
2089         if (adapter->netdev->features & NETIF_F_RXCSUM)
2090                 devRead->misc.uptFeatures |= UPT1_F_RXCSUM;
2091
2092         if (adapter->netdev->features & NETIF_F_LRO) {
2093                 devRead->misc.uptFeatures |= UPT1_F_LRO;
2094                 devRead->misc.maxNumRxSG = cpu_to_le16(1 + MAX_SKB_FRAGS);
2095         }
2096         if (adapter->netdev->features & NETIF_F_HW_VLAN_RX)
2097                 devRead->misc.uptFeatures |= UPT1_F_RXVLAN;
2098
2099         devRead->misc.mtu = cpu_to_le32(adapter->netdev->mtu);
2100         devRead->misc.queueDescPA = cpu_to_le64(adapter->queue_desc_pa);
2101         devRead->misc.queueDescLen = cpu_to_le32(
2102                 adapter->num_tx_queues * sizeof(struct Vmxnet3_TxQueueDesc) +
2103                 adapter->num_rx_queues * sizeof(struct Vmxnet3_RxQueueDesc));
2104
2105         /* tx queue settings */
2106         devRead->misc.numTxQueues =  adapter->num_tx_queues;
2107         for (i = 0; i < adapter->num_tx_queues; i++) {
2108                 struct vmxnet3_tx_queue *tq = &adapter->tx_queue[i];
2109                 BUG_ON(adapter->tx_queue[i].tx_ring.base == NULL);
2110                 tqc = &adapter->tqd_start[i].conf;
2111                 tqc->txRingBasePA   = cpu_to_le64(tq->tx_ring.basePA);
2112                 tqc->dataRingBasePA = cpu_to_le64(tq->data_ring.basePA);
2113                 tqc->compRingBasePA = cpu_to_le64(tq->comp_ring.basePA);
2114                 tqc->ddPA           = cpu_to_le64(virt_to_phys(tq->buf_info));
2115                 tqc->txRingSize     = cpu_to_le32(tq->tx_ring.size);
2116                 tqc->dataRingSize   = cpu_to_le32(tq->data_ring.size);
2117                 tqc->compRingSize   = cpu_to_le32(tq->comp_ring.size);
2118                 tqc->ddLen          = cpu_to_le32(
2119                                         sizeof(struct vmxnet3_tx_buf_info) *
2120                                         tqc->txRingSize);
2121                 tqc->intrIdx        = tq->comp_ring.intr_idx;
2122         }
2123
2124         /* rx queue settings */
2125         devRead->misc.numRxQueues = adapter->num_rx_queues;
2126         for (i = 0; i < adapter->num_rx_queues; i++) {
2127                 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i];
2128                 rqc = &adapter->rqd_start[i].conf;
2129                 rqc->rxRingBasePA[0] = cpu_to_le64(rq->rx_ring[0].basePA);
2130                 rqc->rxRingBasePA[1] = cpu_to_le64(rq->rx_ring[1].basePA);
2131                 rqc->compRingBasePA  = cpu_to_le64(rq->comp_ring.basePA);
2132                 rqc->ddPA            = cpu_to_le64(virt_to_phys(
2133                                                         rq->buf_info));
2134                 rqc->rxRingSize[0]   = cpu_to_le32(rq->rx_ring[0].size);
2135                 rqc->rxRingSize[1]   = cpu_to_le32(rq->rx_ring[1].size);
2136                 rqc->compRingSize    = cpu_to_le32(rq->comp_ring.size);
2137                 rqc->ddLen           = cpu_to_le32(
2138                                         sizeof(struct vmxnet3_rx_buf_info) *
2139                                         (rqc->rxRingSize[0] +
2140                                          rqc->rxRingSize[1]));
2141                 rqc->intrIdx         = rq->comp_ring.intr_idx;
2142         }
2143
2144 #ifdef VMXNET3_RSS
2145         memset(adapter->rss_conf, 0, sizeof(*adapter->rss_conf));
2146
2147         if (adapter->rss) {
2148                 struct UPT1_RSSConf *rssConf = adapter->rss_conf;
2149                 devRead->misc.uptFeatures |= UPT1_F_RSS;
2150                 devRead->misc.numRxQueues = adapter->num_rx_queues;
2151                 rssConf->hashType = UPT1_RSS_HASH_TYPE_TCP_IPV4 |
2152                                     UPT1_RSS_HASH_TYPE_IPV4 |
2153                                     UPT1_RSS_HASH_TYPE_TCP_IPV6 |
2154                                     UPT1_RSS_HASH_TYPE_IPV6;
2155                 rssConf->hashFunc = UPT1_RSS_HASH_FUNC_TOEPLITZ;
2156                 rssConf->hashKeySize = UPT1_RSS_MAX_KEY_SIZE;
2157                 rssConf->indTableSize = VMXNET3_RSS_IND_TABLE_SIZE;
2158                 get_random_bytes(&rssConf->hashKey[0], rssConf->hashKeySize);
2159                 for (i = 0; i < rssConf->indTableSize; i++)
2160                         rssConf->indTable[i] = ethtool_rxfh_indir_default(
2161                                 i, adapter->num_rx_queues);
2162
2163                 devRead->rssConfDesc.confVer = 1;
2164                 devRead->rssConfDesc.confLen = sizeof(*rssConf);
2165                 devRead->rssConfDesc.confPA  = virt_to_phys(rssConf);
2166         }
2167
2168 #endif /* VMXNET3_RSS */
2169
2170         /* intr settings */
2171         devRead->intrConf.autoMask = adapter->intr.mask_mode ==
2172                                      VMXNET3_IMM_AUTO;
2173         devRead->intrConf.numIntrs = adapter->intr.num_intrs;
2174         for (i = 0; i < adapter->intr.num_intrs; i++)
2175                 devRead->intrConf.modLevels[i] = adapter->intr.mod_levels[i];
2176
2177         devRead->intrConf.eventIntrIdx = adapter->intr.event_intr_idx;
2178         devRead->intrConf.intrCtrl |= cpu_to_le32(VMXNET3_IC_DISABLE_ALL);
2179
2180         /* rx filter settings */
2181         devRead->rxFilterConf.rxMode = 0;
2182         vmxnet3_restore_vlan(adapter);
2183         vmxnet3_write_mac_addr(adapter, adapter->netdev->dev_addr);
2184
2185         /* the rest are already zeroed */
2186 }
2187
2188
2189 int
2190 vmxnet3_activate_dev(struct vmxnet3_adapter *adapter)
2191 {
2192         int err, i;
2193         u32 ret;
2194         unsigned long flags;
2195
2196         dev_dbg(&adapter->netdev->dev, "%s: skb_buf_size %d, rx_buf_per_pkt %d,"
2197                 " ring sizes %u %u %u\n", adapter->netdev->name,
2198                 adapter->skb_buf_size, adapter->rx_buf_per_pkt,
2199                 adapter->tx_queue[0].tx_ring.size,
2200                 adapter->rx_queue[0].rx_ring[0].size,
2201                 adapter->rx_queue[0].rx_ring[1].size);
2202
2203         vmxnet3_tq_init_all(adapter);
2204         err = vmxnet3_rq_init_all(adapter);
2205         if (err) {
2206                 printk(KERN_ERR "Failed to init rx queue for %s: error %d\n",
2207                        adapter->netdev->name, err);
2208                 goto rq_err;
2209         }
2210
2211         err = vmxnet3_request_irqs(adapter);
2212         if (err) {
2213                 printk(KERN_ERR "Failed to setup irq for %s: error %d\n",
2214                        adapter->netdev->name, err);
2215                 goto irq_err;
2216         }
2217
2218         vmxnet3_setup_driver_shared(adapter);
2219
2220         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAL, VMXNET3_GET_ADDR_LO(
2221                                adapter->shared_pa));
2222         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAH, VMXNET3_GET_ADDR_HI(
2223                                adapter->shared_pa));
2224         spin_lock_irqsave(&adapter->cmd_lock, flags);
2225         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2226                                VMXNET3_CMD_ACTIVATE_DEV);
2227         ret = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);
2228         spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2229
2230         if (ret != 0) {
2231                 printk(KERN_ERR "Failed to activate dev %s: error %u\n",
2232                        adapter->netdev->name, ret);
2233                 err = -EINVAL;
2234                 goto activate_err;
2235         }
2236
2237         for (i = 0; i < adapter->num_rx_queues; i++) {
2238                 VMXNET3_WRITE_BAR0_REG(adapter,
2239                                 VMXNET3_REG_RXPROD + i * VMXNET3_REG_ALIGN,
2240                                 adapter->rx_queue[i].rx_ring[0].next2fill);
2241                 VMXNET3_WRITE_BAR0_REG(adapter, (VMXNET3_REG_RXPROD2 +
2242                                 (i * VMXNET3_REG_ALIGN)),
2243                                 adapter->rx_queue[i].rx_ring[1].next2fill);
2244         }
2245
2246         /* Apply the rx filter settins last. */
2247         vmxnet3_set_mc(adapter->netdev);
2248
2249         /*
2250          * Check link state when first activating device. It will start the
2251          * tx queue if the link is up.
2252          */
2253         vmxnet3_check_link(adapter, true);
2254         for (i = 0; i < adapter->num_rx_queues; i++)
2255                 napi_enable(&adapter->rx_queue[i].napi);
2256         vmxnet3_enable_all_intrs(adapter);
2257         clear_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state);
2258         return 0;
2259
2260 activate_err:
2261         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAL, 0);
2262         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAH, 0);
2263         vmxnet3_free_irqs(adapter);
2264 irq_err:
2265 rq_err:
2266         /* free up buffers we allocated */
2267         vmxnet3_rq_cleanup_all(adapter);
2268         return err;
2269 }
2270
2271
2272 void
2273 vmxnet3_reset_dev(struct vmxnet3_adapter *adapter)
2274 {
2275         unsigned long flags;
2276         spin_lock_irqsave(&adapter->cmd_lock, flags);
2277         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_RESET_DEV);
2278         spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2279 }
2280
2281
2282 int
2283 vmxnet3_quiesce_dev(struct vmxnet3_adapter *adapter)
2284 {
2285         int i;
2286         unsigned long flags;
2287         if (test_and_set_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state))
2288                 return 0;
2289
2290
2291         spin_lock_irqsave(&adapter->cmd_lock, flags);
2292         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2293                                VMXNET3_CMD_QUIESCE_DEV);
2294         spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2295         vmxnet3_disable_all_intrs(adapter);
2296
2297         for (i = 0; i < adapter->num_rx_queues; i++)
2298                 napi_disable(&adapter->rx_queue[i].napi);
2299         netif_tx_disable(adapter->netdev);
2300         adapter->link_speed = 0;
2301         netif_carrier_off(adapter->netdev);
2302
2303         vmxnet3_tq_cleanup_all(adapter);
2304         vmxnet3_rq_cleanup_all(adapter);
2305         vmxnet3_free_irqs(adapter);
2306         return 0;
2307 }
2308
2309
2310 static void
2311 vmxnet3_write_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac)
2312 {
2313         u32 tmp;
2314
2315         tmp = *(u32 *)mac;
2316         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_MACL, tmp);
2317
2318         tmp = (mac[5] << 8) | mac[4];
2319         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_MACH, tmp);
2320 }
2321
2322
2323 static int
2324 vmxnet3_set_mac_addr(struct net_device *netdev, void *p)
2325 {
2326         struct sockaddr *addr = p;
2327         struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2328
2329         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2330         vmxnet3_write_mac_addr(adapter, addr->sa_data);
2331
2332         return 0;
2333 }
2334
2335
2336 /* ==================== initialization and cleanup routines ============ */
2337
2338 static int
2339 vmxnet3_alloc_pci_resources(struct vmxnet3_adapter *adapter, bool *dma64)
2340 {
2341         int err;
2342         unsigned long mmio_start, mmio_len;
2343         struct pci_dev *pdev = adapter->pdev;
2344
2345         err = pci_enable_device(pdev);
2346         if (err) {
2347                 printk(KERN_ERR "Failed to enable adapter %s: error %d\n",
2348                        pci_name(pdev), err);
2349                 return err;
2350         }
2351
2352         if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) == 0) {
2353                 if (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)) != 0) {
2354                         printk(KERN_ERR "pci_set_consistent_dma_mask failed "
2355                                "for adapter %s\n", pci_name(pdev));
2356                         err = -EIO;
2357                         goto err_set_mask;
2358                 }
2359                 *dma64 = true;
2360         } else {
2361                 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) {
2362                         printk(KERN_ERR "pci_set_dma_mask failed for adapter "
2363                                "%s\n",  pci_name(pdev));
2364                         err = -EIO;
2365                         goto err_set_mask;
2366                 }
2367                 *dma64 = false;
2368         }
2369
2370         err = pci_request_selected_regions(pdev, (1 << 2) - 1,
2371                                            vmxnet3_driver_name);
2372         if (err) {
2373                 printk(KERN_ERR "Failed to request region for adapter %s: "
2374                        "error %d\n", pci_name(pdev), err);
2375                 goto err_set_mask;
2376         }
2377
2378         pci_set_master(pdev);
2379
2380         mmio_start = pci_resource_start(pdev, 0);
2381         mmio_len = pci_resource_len(pdev, 0);
2382         adapter->hw_addr0 = ioremap(mmio_start, mmio_len);
2383         if (!adapter->hw_addr0) {
2384                 printk(KERN_ERR "Failed to map bar0 for adapter %s\n",
2385                        pci_name(pdev));
2386                 err = -EIO;
2387                 goto err_ioremap;
2388         }
2389
2390         mmio_start = pci_resource_start(pdev, 1);
2391         mmio_len = pci_resource_len(pdev, 1);
2392         adapter->hw_addr1 = ioremap(mmio_start, mmio_len);
2393         if (!adapter->hw_addr1) {
2394                 printk(KERN_ERR "Failed to map bar1 for adapter %s\n",
2395                        pci_name(pdev));
2396                 err = -EIO;
2397                 goto err_bar1;
2398         }
2399         return 0;
2400
2401 err_bar1:
2402         iounmap(adapter->hw_addr0);
2403 err_ioremap:
2404         pci_release_selected_regions(pdev, (1 << 2) - 1);
2405 err_set_mask:
2406         pci_disable_device(pdev);
2407         return err;
2408 }
2409
2410
2411 static void
2412 vmxnet3_free_pci_resources(struct vmxnet3_adapter *adapter)
2413 {
2414         BUG_ON(!adapter->pdev);
2415
2416         iounmap(adapter->hw_addr0);
2417         iounmap(adapter->hw_addr1);
2418         pci_release_selected_regions(adapter->pdev, (1 << 2) - 1);
2419         pci_disable_device(adapter->pdev);
2420 }
2421
2422
2423 static void
2424 vmxnet3_adjust_rx_ring_size(struct vmxnet3_adapter *adapter)
2425 {
2426         size_t sz, i, ring0_size, ring1_size, comp_size;
2427         struct vmxnet3_rx_queue *rq = &adapter->rx_queue[0];
2428
2429
2430         if (adapter->netdev->mtu <= VMXNET3_MAX_SKB_BUF_SIZE -
2431                                     VMXNET3_MAX_ETH_HDR_SIZE) {
2432                 adapter->skb_buf_size = adapter->netdev->mtu +
2433                                         VMXNET3_MAX_ETH_HDR_SIZE;
2434                 if (adapter->skb_buf_size < VMXNET3_MIN_T0_BUF_SIZE)
2435                         adapter->skb_buf_size = VMXNET3_MIN_T0_BUF_SIZE;
2436
2437                 adapter->rx_buf_per_pkt = 1;
2438         } else {
2439                 adapter->skb_buf_size = VMXNET3_MAX_SKB_BUF_SIZE;
2440                 sz = adapter->netdev->mtu - VMXNET3_MAX_SKB_BUF_SIZE +
2441                                             VMXNET3_MAX_ETH_HDR_SIZE;
2442                 adapter->rx_buf_per_pkt = 1 + (sz + PAGE_SIZE - 1) / PAGE_SIZE;
2443         }
2444
2445         /*
2446          * for simplicity, force the ring0 size to be a multiple of
2447          * rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN
2448          */
2449         sz = adapter->rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN;
2450         ring0_size = adapter->rx_queue[0].rx_ring[0].size;
2451         ring0_size = (ring0_size + sz - 1) / sz * sz;
2452         ring0_size = min_t(u32, ring0_size, VMXNET3_RX_RING_MAX_SIZE /
2453                            sz * sz);
2454         ring1_size = adapter->rx_queue[0].rx_ring[1].size;
2455         comp_size = ring0_size + ring1_size;
2456
2457         for (i = 0; i < adapter->num_rx_queues; i++) {
2458                 rq = &adapter->rx_queue[i];
2459                 rq->rx_ring[0].size = ring0_size;
2460                 rq->rx_ring[1].size = ring1_size;
2461                 rq->comp_ring.size = comp_size;
2462         }
2463 }
2464
2465
2466 int
2467 vmxnet3_create_queues(struct vmxnet3_adapter *adapter, u32 tx_ring_size,
2468                       u32 rx_ring_size, u32 rx_ring2_size)
2469 {
2470         int err = 0, i;
2471
2472         for (i = 0; i < adapter->num_tx_queues; i++) {
2473                 struct vmxnet3_tx_queue *tq = &adapter->tx_queue[i];
2474                 tq->tx_ring.size   = tx_ring_size;
2475                 tq->data_ring.size = tx_ring_size;
2476                 tq->comp_ring.size = tx_ring_size;
2477                 tq->shared = &adapter->tqd_start[i].ctrl;
2478                 tq->stopped = true;
2479                 tq->adapter = adapter;
2480                 tq->qid = i;
2481                 err = vmxnet3_tq_create(tq, adapter);
2482                 /*
2483                  * Too late to change num_tx_queues. We cannot do away with
2484                  * lesser number of queues than what we asked for
2485                  */
2486                 if (err)
2487                         goto queue_err;
2488         }
2489
2490         adapter->rx_queue[0].rx_ring[0].size = rx_ring_size;
2491         adapter->rx_queue[0].rx_ring[1].size = rx_ring2_size;
2492         vmxnet3_adjust_rx_ring_size(adapter);
2493         for (i = 0; i < adapter->num_rx_queues; i++) {
2494                 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i];
2495                 /* qid and qid2 for rx queues will be assigned later when num
2496                  * of rx queues is finalized after allocating intrs */
2497                 rq->shared = &adapter->rqd_start[i].ctrl;
2498                 rq->adapter = adapter;
2499                 err = vmxnet3_rq_create(rq, adapter);
2500                 if (err) {
2501                         if (i == 0) {
2502                                 printk(KERN_ERR "Could not allocate any rx"
2503                                        "queues. Aborting.\n");
2504                                 goto queue_err;
2505                         } else {
2506                                 printk(KERN_INFO "Number of rx queues changed "
2507                                        "to : %d.\n", i);
2508                                 adapter->num_rx_queues = i;
2509                                 err = 0;
2510                                 break;
2511                         }
2512                 }
2513         }
2514         return err;
2515 queue_err:
2516         vmxnet3_tq_destroy_all(adapter);
2517         return err;
2518 }
2519
2520 static int
2521 vmxnet3_open(struct net_device *netdev)
2522 {
2523         struct vmxnet3_adapter *adapter;
2524         int err, i;
2525
2526         adapter = netdev_priv(netdev);
2527
2528         for (i = 0; i < adapter->num_tx_queues; i++)
2529                 spin_lock_init(&adapter->tx_queue[i].tx_lock);
2530
2531         err = vmxnet3_create_queues(adapter, VMXNET3_DEF_TX_RING_SIZE,
2532                                     VMXNET3_DEF_RX_RING_SIZE,
2533                                     VMXNET3_DEF_RX_RING_SIZE);
2534         if (err)
2535                 goto queue_err;
2536
2537         err = vmxnet3_activate_dev(adapter);
2538         if (err)
2539                 goto activate_err;
2540
2541         return 0;
2542
2543 activate_err:
2544         vmxnet3_rq_destroy_all(adapter);
2545         vmxnet3_tq_destroy_all(adapter);
2546 queue_err:
2547         return err;
2548 }
2549
2550
2551 static int
2552 vmxnet3_close(struct net_device *netdev)
2553 {
2554         struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2555
2556         /*
2557          * Reset_work may be in the middle of resetting the device, wait for its
2558          * completion.
2559          */
2560         while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state))
2561                 msleep(1);
2562
2563         vmxnet3_quiesce_dev(adapter);
2564
2565         vmxnet3_rq_destroy_all(adapter);
2566         vmxnet3_tq_destroy_all(adapter);
2567
2568         clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
2569
2570
2571         return 0;
2572 }
2573
2574
2575 void
2576 vmxnet3_force_close(struct vmxnet3_adapter *adapter)
2577 {
2578         int i;
2579
2580         /*
2581          * we must clear VMXNET3_STATE_BIT_RESETTING, otherwise
2582          * vmxnet3_close() will deadlock.
2583          */
2584         BUG_ON(test_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state));
2585
2586         /* we need to enable NAPI, otherwise dev_close will deadlock */
2587         for (i = 0; i < adapter->num_rx_queues; i++)
2588                 napi_enable(&adapter->rx_queue[i].napi);
2589         dev_close(adapter->netdev);
2590 }
2591
2592
2593 static int
2594 vmxnet3_change_mtu(struct net_device *netdev, int new_mtu)
2595 {
2596         struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2597         int err = 0;
2598
2599         if (new_mtu < VMXNET3_MIN_MTU || new_mtu > VMXNET3_MAX_MTU)
2600                 return -EINVAL;
2601
2602         netdev->mtu = new_mtu;
2603
2604         /*
2605          * Reset_work may be in the middle of resetting the device, wait for its
2606          * completion.
2607          */
2608         while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state))
2609                 msleep(1);
2610
2611         if (netif_running(netdev)) {
2612                 vmxnet3_quiesce_dev(adapter);
2613                 vmxnet3_reset_dev(adapter);
2614
2615                 /* we need to re-create the rx queue based on the new mtu */
2616                 vmxnet3_rq_destroy_all(adapter);
2617                 vmxnet3_adjust_rx_ring_size(adapter);
2618                 err = vmxnet3_rq_create_all(adapter);
2619                 if (err) {
2620                         printk(KERN_ERR "%s: failed to re-create rx queues,"
2621                                 " error %d. Closing it.\n", netdev->name, err);
2622                         goto out;
2623                 }
2624
2625                 err = vmxnet3_activate_dev(adapter);
2626                 if (err) {
2627                         printk(KERN_ERR "%s: failed to re-activate, error %d. "
2628                                 "Closing it\n", netdev->name, err);
2629                         goto out;
2630                 }
2631         }
2632
2633 out:
2634         clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
2635         if (err)
2636                 vmxnet3_force_close(adapter);
2637
2638         return err;
2639 }
2640
2641
2642 static void
2643 vmxnet3_declare_features(struct vmxnet3_adapter *adapter, bool dma64)
2644 {
2645         struct net_device *netdev = adapter->netdev;
2646
2647         netdev->hw_features = NETIF_F_SG | NETIF_F_RXCSUM |
2648                 NETIF_F_HW_CSUM | NETIF_F_HW_VLAN_TX |
2649                 NETIF_F_HW_VLAN_RX | NETIF_F_TSO | NETIF_F_TSO6 |
2650                 NETIF_F_LRO;
2651         if (dma64)
2652                 netdev->hw_features |= NETIF_F_HIGHDMA;
2653         netdev->vlan_features = netdev->hw_features &
2654                                 ~(NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX);
2655         netdev->features = netdev->hw_features | NETIF_F_HW_VLAN_FILTER;
2656
2657         netdev_info(adapter->netdev,
2658                 "features: sg csum vlan jf tso tsoIPv6 lro%s\n",
2659                 dma64 ? " highDMA" : "");
2660 }
2661
2662
2663 static void
2664 vmxnet3_read_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac)
2665 {
2666         u32 tmp;
2667
2668         tmp = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_MACL);
2669         *(u32 *)mac = tmp;
2670
2671         tmp = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_MACH);
2672         mac[4] = tmp & 0xff;
2673         mac[5] = (tmp >> 8) & 0xff;
2674 }
2675
2676 #ifdef CONFIG_PCI_MSI
2677
2678 /*
2679  * Enable MSIx vectors.
2680  * Returns :
2681  *      0 on successful enabling of required vectors,
2682  *      VMXNET3_LINUX_MIN_MSIX_VECT when only minimum number of vectors required
2683  *       could be enabled.
2684  *      number of vectors which can be enabled otherwise (this number is smaller
2685  *       than VMXNET3_LINUX_MIN_MSIX_VECT)
2686  */
2687
2688 static int
2689 vmxnet3_acquire_msix_vectors(struct vmxnet3_adapter *adapter,
2690                              int vectors)
2691 {
2692         int err = 0, vector_threshold;
2693         vector_threshold = VMXNET3_LINUX_MIN_MSIX_VECT;
2694
2695         while (vectors >= vector_threshold) {
2696                 err = pci_enable_msix(adapter->pdev, adapter->intr.msix_entries,
2697                                       vectors);
2698                 if (!err) {
2699                         adapter->intr.num_intrs = vectors;
2700                         return 0;
2701                 } else if (err < 0) {
2702                         netdev_err(adapter->netdev,
2703                                    "Failed to enable MSI-X, error: %d\n", err);
2704                         vectors = 0;
2705                 } else if (err < vector_threshold) {
2706                         break;
2707                 } else {
2708                         /* If fails to enable required number of MSI-x vectors
2709                          * try enabling minimum number of vectors required.
2710                          */
2711                         netdev_err(adapter->netdev,
2712                                    "Failed to enable %d MSI-X, trying %d instead\n",
2713                                     vectors, vector_threshold);
2714                         vectors = vector_threshold;
2715                 }
2716         }
2717
2718         netdev_info(adapter->netdev,
2719                     "Number of MSI-X interrupts which can be allocated are lower than min threshold required.\n");
2720         return err;
2721 }
2722
2723
2724 #endif /* CONFIG_PCI_MSI */
2725
2726 static void
2727 vmxnet3_alloc_intr_resources(struct vmxnet3_adapter *adapter)
2728 {
2729         u32 cfg;
2730         unsigned long flags;
2731
2732         /* intr settings */
2733         spin_lock_irqsave(&adapter->cmd_lock, flags);
2734         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2735                                VMXNET3_CMD_GET_CONF_INTR);
2736         cfg = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);
2737         spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2738         adapter->intr.type = cfg & 0x3;
2739         adapter->intr.mask_mode = (cfg >> 2) & 0x3;
2740
2741         if (adapter->intr.type == VMXNET3_IT_AUTO) {
2742                 adapter->intr.type = VMXNET3_IT_MSIX;
2743         }
2744
2745 #ifdef CONFIG_PCI_MSI
2746         if (adapter->intr.type == VMXNET3_IT_MSIX) {
2747                 int vector, err = 0;
2748
2749                 adapter->intr.num_intrs = (adapter->share_intr ==
2750                                            VMXNET3_INTR_TXSHARE) ? 1 :
2751                                            adapter->num_tx_queues;
2752                 adapter->intr.num_intrs += (adapter->share_intr ==
2753                                            VMXNET3_INTR_BUDDYSHARE) ? 0 :
2754                                            adapter->num_rx_queues;
2755                 adapter->intr.num_intrs += 1;           /* for link event */
2756
2757                 adapter->intr.num_intrs = (adapter->intr.num_intrs >
2758                                            VMXNET3_LINUX_MIN_MSIX_VECT
2759                                            ? adapter->intr.num_intrs :
2760                                            VMXNET3_LINUX_MIN_MSIX_VECT);
2761
2762                 for (vector = 0; vector < adapter->intr.num_intrs; vector++)
2763                         adapter->intr.msix_entries[vector].entry = vector;
2764
2765                 err = vmxnet3_acquire_msix_vectors(adapter,
2766                                                    adapter->intr.num_intrs);
2767                 /* If we cannot allocate one MSIx vector per queue
2768                  * then limit the number of rx queues to 1
2769                  */
2770                 if (err == VMXNET3_LINUX_MIN_MSIX_VECT) {
2771                         if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE
2772                             || adapter->num_rx_queues != 1) {
2773                                 adapter->share_intr = VMXNET3_INTR_TXSHARE;
2774                                 printk(KERN_ERR "Number of rx queues : 1\n");
2775                                 adapter->num_rx_queues = 1;
2776                                 adapter->intr.num_intrs =
2777                                                 VMXNET3_LINUX_MIN_MSIX_VECT;
2778                         }
2779                         return;
2780                 }
2781                 if (!err)
2782                         return;
2783
2784                 /* If we cannot allocate MSIx vectors use only one rx queue */
2785                 netdev_info(adapter->netdev,
2786                             "Failed to enable MSI-X, error %d . Limiting #rx queues to 1, try MSI.\n",
2787                             err);
2788
2789                 adapter->intr.type = VMXNET3_IT_MSI;
2790         }
2791
2792         if (adapter->intr.type == VMXNET3_IT_MSI) {
2793                 int err;
2794                 err = pci_enable_msi(adapter->pdev);
2795                 if (!err) {
2796                         adapter->num_rx_queues = 1;
2797                         adapter->intr.num_intrs = 1;
2798                         return;
2799                 }
2800         }
2801 #endif /* CONFIG_PCI_MSI */
2802
2803         adapter->num_rx_queues = 1;
2804         printk(KERN_INFO "Using INTx interrupt, #Rx queues: 1.\n");
2805         adapter->intr.type = VMXNET3_IT_INTX;
2806
2807         /* INT-X related setting */
2808         adapter->intr.num_intrs = 1;
2809 }
2810
2811
2812 static void
2813 vmxnet3_free_intr_resources(struct vmxnet3_adapter *adapter)
2814 {
2815         if (adapter->intr.type == VMXNET3_IT_MSIX)
2816                 pci_disable_msix(adapter->pdev);
2817         else if (adapter->intr.type == VMXNET3_IT_MSI)
2818                 pci_disable_msi(adapter->pdev);
2819         else
2820                 BUG_ON(adapter->intr.type != VMXNET3_IT_INTX);
2821 }
2822
2823
2824 static void
2825 vmxnet3_tx_timeout(struct net_device *netdev)
2826 {
2827         struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2828         adapter->tx_timeout_count++;
2829
2830         printk(KERN_ERR "%s: tx hang\n", adapter->netdev->name);
2831         schedule_work(&adapter->work);
2832         netif_wake_queue(adapter->netdev);
2833 }
2834
2835
2836 static void
2837 vmxnet3_reset_work(struct work_struct *data)
2838 {
2839         struct vmxnet3_adapter *adapter;
2840
2841         adapter = container_of(data, struct vmxnet3_adapter, work);
2842
2843         /* if another thread is resetting the device, no need to proceed */
2844         if (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state))
2845                 return;
2846
2847         /* if the device is closed, we must leave it alone */
2848         rtnl_lock();
2849         if (netif_running(adapter->netdev)) {
2850                 printk(KERN_INFO "%s: resetting\n", adapter->netdev->name);
2851                 vmxnet3_quiesce_dev(adapter);
2852                 vmxnet3_reset_dev(adapter);
2853                 vmxnet3_activate_dev(adapter);
2854         } else {
2855                 printk(KERN_INFO "%s: already closed\n", adapter->netdev->name);
2856         }
2857         rtnl_unlock();
2858
2859         clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
2860 }
2861
2862
2863 static int __devinit
2864 vmxnet3_probe_device(struct pci_dev *pdev,
2865                      const struct pci_device_id *id)
2866 {
2867         static const struct net_device_ops vmxnet3_netdev_ops = {
2868                 .ndo_open = vmxnet3_open,
2869                 .ndo_stop = vmxnet3_close,
2870                 .ndo_start_xmit = vmxnet3_xmit_frame,
2871                 .ndo_set_mac_address = vmxnet3_set_mac_addr,
2872                 .ndo_change_mtu = vmxnet3_change_mtu,
2873                 .ndo_set_features = vmxnet3_set_features,
2874                 .ndo_get_stats64 = vmxnet3_get_stats64,
2875                 .ndo_tx_timeout = vmxnet3_tx_timeout,
2876                 .ndo_set_rx_mode = vmxnet3_set_mc,
2877                 .ndo_vlan_rx_add_vid = vmxnet3_vlan_rx_add_vid,
2878                 .ndo_vlan_rx_kill_vid = vmxnet3_vlan_rx_kill_vid,
2879 #ifdef CONFIG_NET_POLL_CONTROLLER
2880                 .ndo_poll_controller = vmxnet3_netpoll,
2881 #endif
2882         };
2883         int err;
2884         bool dma64 = false; /* stupid gcc */
2885         u32 ver;
2886         struct net_device *netdev;
2887         struct vmxnet3_adapter *adapter;
2888         u8 mac[ETH_ALEN];
2889         int size;
2890         int num_tx_queues;
2891         int num_rx_queues;
2892
2893         if (!pci_msi_enabled())
2894                 enable_mq = 0;
2895
2896 #ifdef VMXNET3_RSS
2897         if (enable_mq)
2898                 num_rx_queues = min(VMXNET3_DEVICE_MAX_RX_QUEUES,
2899                                     (int)num_online_cpus());
2900         else
2901 #endif
2902                 num_rx_queues = 1;
2903         num_rx_queues = rounddown_pow_of_two(num_rx_queues);
2904
2905         if (enable_mq)
2906                 num_tx_queues = min(VMXNET3_DEVICE_MAX_TX_QUEUES,
2907                                     (int)num_online_cpus());
2908         else
2909                 num_tx_queues = 1;
2910
2911         num_tx_queues = rounddown_pow_of_two(num_tx_queues);
2912         netdev = alloc_etherdev_mq(sizeof(struct vmxnet3_adapter),
2913                                    max(num_tx_queues, num_rx_queues));
2914         printk(KERN_INFO "# of Tx queues : %d, # of Rx queues : %d\n",
2915                num_tx_queues, num_rx_queues);
2916
2917         if (!netdev)
2918                 return -ENOMEM;
2919
2920         pci_set_drvdata(pdev, netdev);
2921         adapter = netdev_priv(netdev);
2922         adapter->netdev = netdev;
2923         adapter->pdev = pdev;
2924
2925         spin_lock_init(&adapter->cmd_lock);
2926         adapter->shared = pci_alloc_consistent(adapter->pdev,
2927                           sizeof(struct Vmxnet3_DriverShared),
2928                           &adapter->shared_pa);
2929         if (!adapter->shared) {
2930                 printk(KERN_ERR "Failed to allocate memory for %s\n",
2931                         pci_name(pdev));
2932                 err = -ENOMEM;
2933                 goto err_alloc_shared;
2934         }
2935
2936         adapter->num_rx_queues = num_rx_queues;
2937         adapter->num_tx_queues = num_tx_queues;
2938
2939         size = sizeof(struct Vmxnet3_TxQueueDesc) * adapter->num_tx_queues;
2940         size += sizeof(struct Vmxnet3_RxQueueDesc) * adapter->num_rx_queues;
2941         adapter->tqd_start = pci_alloc_consistent(adapter->pdev, size,
2942                              &adapter->queue_desc_pa);
2943
2944         if (!adapter->tqd_start) {
2945                 printk(KERN_ERR "Failed to allocate memory for %s\n",
2946                         pci_name(pdev));
2947                 err = -ENOMEM;
2948                 goto err_alloc_queue_desc;
2949         }
2950         adapter->rqd_start = (struct Vmxnet3_RxQueueDesc *)(adapter->tqd_start +
2951                                                         adapter->num_tx_queues);
2952
2953         adapter->pm_conf = kmalloc(sizeof(struct Vmxnet3_PMConf), GFP_KERNEL);
2954         if (adapter->pm_conf == NULL) {
2955                 err = -ENOMEM;
2956                 goto err_alloc_pm;
2957         }
2958
2959 #ifdef VMXNET3_RSS
2960
2961         adapter->rss_conf = kmalloc(sizeof(struct UPT1_RSSConf), GFP_KERNEL);
2962         if (adapter->rss_conf == NULL) {
2963                 err = -ENOMEM;
2964                 goto err_alloc_rss;
2965         }
2966 #endif /* VMXNET3_RSS */
2967
2968         err = vmxnet3_alloc_pci_resources(adapter, &dma64);
2969         if (err < 0)
2970                 goto err_alloc_pci;
2971
2972         ver = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_VRRS);
2973         if (ver & 1) {
2974                 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_VRRS, 1);
2975         } else {
2976                 printk(KERN_ERR "Incompatible h/w version (0x%x) for adapter"
2977                        " %s\n", ver, pci_name(pdev));
2978                 err = -EBUSY;
2979                 goto err_ver;
2980         }
2981
2982         ver = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_UVRS);
2983         if (ver & 1) {
2984                 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_UVRS, 1);
2985         } else {
2986                 printk(KERN_ERR "Incompatible upt version (0x%x) for "
2987                        "adapter %s\n", ver, pci_name(pdev));
2988                 err = -EBUSY;
2989                 goto err_ver;
2990         }
2991
2992         SET_NETDEV_DEV(netdev, &pdev->dev);
2993         vmxnet3_declare_features(adapter, dma64);
2994
2995         adapter->dev_number = atomic_read(&devices_found);
2996
2997          adapter->share_intr = irq_share_mode;
2998         if (adapter->share_intr == VMXNET3_INTR_BUDDYSHARE &&
2999             adapter->num_tx_queues != adapter->num_rx_queues)
3000                 adapter->share_intr = VMXNET3_INTR_DONTSHARE;
3001
3002         vmxnet3_alloc_intr_resources(adapter);
3003
3004 #ifdef VMXNET3_RSS
3005         if (adapter->num_rx_queues > 1 &&
3006             adapter->intr.type == VMXNET3_IT_MSIX) {
3007                 adapter->rss = true;
3008                 printk(KERN_INFO "RSS is enabled.\n");
3009         } else {
3010                 adapter->rss = false;
3011         }
3012 #endif
3013
3014         vmxnet3_read_mac_addr(adapter, mac);
3015         memcpy(netdev->dev_addr,  mac, netdev->addr_len);
3016
3017         netdev->netdev_ops = &vmxnet3_netdev_ops;
3018         vmxnet3_set_ethtool_ops(netdev);
3019         netdev->watchdog_timeo = 5 * HZ;
3020
3021         INIT_WORK(&adapter->work, vmxnet3_reset_work);
3022         set_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state);
3023
3024         if (adapter->intr.type == VMXNET3_IT_MSIX) {
3025                 int i;
3026                 for (i = 0; i < adapter->num_rx_queues; i++) {
3027                         netif_napi_add(adapter->netdev,
3028                                        &adapter->rx_queue[i].napi,
3029                                        vmxnet3_poll_rx_only, 64);
3030                 }
3031         } else {
3032                 netif_napi_add(adapter->netdev, &adapter->rx_queue[0].napi,
3033                                vmxnet3_poll, 64);
3034         }
3035
3036         netif_set_real_num_tx_queues(adapter->netdev, adapter->num_tx_queues);
3037         netif_set_real_num_rx_queues(adapter->netdev, adapter->num_rx_queues);
3038
3039         err = register_netdev(netdev);
3040
3041         if (err) {
3042                 printk(KERN_ERR "Failed to register adapter %s\n",
3043                         pci_name(pdev));
3044                 goto err_register;
3045         }
3046
3047         vmxnet3_check_link(adapter, false);
3048         atomic_inc(&devices_found);
3049         return 0;
3050
3051 err_register:
3052         vmxnet3_free_intr_resources(adapter);
3053 err_ver:
3054         vmxnet3_free_pci_resources(adapter);
3055 err_alloc_pci:
3056 #ifdef VMXNET3_RSS
3057         kfree(adapter->rss_conf);
3058 err_alloc_rss:
3059 #endif
3060         kfree(adapter->pm_conf);
3061 err_alloc_pm:
3062         pci_free_consistent(adapter->pdev, size, adapter->tqd_start,
3063                             adapter->queue_desc_pa);
3064 err_alloc_queue_desc:
3065         pci_free_consistent(adapter->pdev, sizeof(struct Vmxnet3_DriverShared),
3066                             adapter->shared, adapter->shared_pa);
3067 err_alloc_shared:
3068         pci_set_drvdata(pdev, NULL);
3069         free_netdev(netdev);
3070         return err;
3071 }
3072
3073
3074 static void __devexit
3075 vmxnet3_remove_device(struct pci_dev *pdev)
3076 {
3077         struct net_device *netdev = pci_get_drvdata(pdev);
3078         struct vmxnet3_adapter *adapter = netdev_priv(netdev);
3079         int size = 0;
3080         int num_rx_queues;
3081
3082 #ifdef VMXNET3_RSS
3083         if (enable_mq)
3084                 num_rx_queues = min(VMXNET3_DEVICE_MAX_RX_QUEUES,
3085                                     (int)num_online_cpus());
3086         else
3087 #endif
3088                 num_rx_queues = 1;
3089         num_rx_queues = rounddown_pow_of_two(num_rx_queues);
3090
3091         cancel_work_sync(&adapter->work);
3092
3093         unregister_netdev(netdev);
3094
3095         vmxnet3_free_intr_resources(adapter);
3096         vmxnet3_free_pci_resources(adapter);
3097 #ifdef VMXNET3_RSS
3098         kfree(adapter->rss_conf);
3099 #endif
3100         kfree(adapter->pm_conf);
3101
3102         size = sizeof(struct Vmxnet3_TxQueueDesc) * adapter->num_tx_queues;
3103         size += sizeof(struct Vmxnet3_RxQueueDesc) * num_rx_queues;
3104         pci_free_consistent(adapter->pdev, size, adapter->tqd_start,
3105                             adapter->queue_desc_pa);
3106         pci_free_consistent(adapter->pdev, sizeof(struct Vmxnet3_DriverShared),
3107                             adapter->shared, adapter->shared_pa);
3108         free_netdev(netdev);
3109 }
3110
3111
3112 #ifdef CONFIG_PM
3113
3114 static int
3115 vmxnet3_suspend(struct device *device)
3116 {
3117         struct pci_dev *pdev = to_pci_dev(device);
3118         struct net_device *netdev = pci_get_drvdata(pdev);
3119         struct vmxnet3_adapter *adapter = netdev_priv(netdev);
3120         struct Vmxnet3_PMConf *pmConf;
3121         struct ethhdr *ehdr;
3122         struct arphdr *ahdr;
3123         u8 *arpreq;
3124         struct in_device *in_dev;
3125         struct in_ifaddr *ifa;
3126         unsigned long flags;
3127         int i = 0;
3128
3129         if (!netif_running(netdev))
3130                 return 0;
3131
3132         for (i = 0; i < adapter->num_rx_queues; i++)
3133                 napi_disable(&adapter->rx_queue[i].napi);
3134
3135         vmxnet3_disable_all_intrs(adapter);
3136         vmxnet3_free_irqs(adapter);
3137         vmxnet3_free_intr_resources(adapter);
3138
3139         netif_device_detach(netdev);
3140         netif_tx_stop_all_queues(netdev);
3141
3142         /* Create wake-up filters. */
3143         pmConf = adapter->pm_conf;
3144         memset(pmConf, 0, sizeof(*pmConf));
3145
3146         if (adapter->wol & WAKE_UCAST) {
3147                 pmConf->filters[i].patternSize = ETH_ALEN;
3148                 pmConf->filters[i].maskSize = 1;
3149                 memcpy(pmConf->filters[i].pattern, netdev->dev_addr, ETH_ALEN);
3150                 pmConf->filters[i].mask[0] = 0x3F; /* LSB ETH_ALEN bits */
3151
3152                 pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_FILTER;
3153                 i++;
3154         }
3155
3156         if (adapter->wol & WAKE_ARP) {
3157                 in_dev = in_dev_get(netdev);
3158                 if (!in_dev)
3159                         goto skip_arp;
3160
3161                 ifa = (struct in_ifaddr *)in_dev->ifa_list;
3162                 if (!ifa)
3163                         goto skip_arp;
3164
3165                 pmConf->filters[i].patternSize = ETH_HLEN + /* Ethernet header*/
3166                         sizeof(struct arphdr) +         /* ARP header */
3167                         2 * ETH_ALEN +          /* 2 Ethernet addresses*/
3168                         2 * sizeof(u32);        /*2 IPv4 addresses */
3169                 pmConf->filters[i].maskSize =
3170                         (pmConf->filters[i].patternSize - 1) / 8 + 1;
3171
3172                 /* ETH_P_ARP in Ethernet header. */
3173                 ehdr = (struct ethhdr *)pmConf->filters[i].pattern;
3174                 ehdr->h_proto = htons(ETH_P_ARP);
3175
3176                 /* ARPOP_REQUEST in ARP header. */
3177                 ahdr = (struct arphdr *)&pmConf->filters[i].pattern[ETH_HLEN];
3178                 ahdr->ar_op = htons(ARPOP_REQUEST);
3179                 arpreq = (u8 *)(ahdr + 1);
3180
3181                 /* The Unicast IPv4 address in 'tip' field. */
3182                 arpreq += 2 * ETH_ALEN + sizeof(u32);
3183                 *(u32 *)arpreq = ifa->ifa_address;
3184
3185                 /* The mask for the relevant bits. */
3186                 pmConf->filters[i].mask[0] = 0x00;
3187                 pmConf->filters[i].mask[1] = 0x30; /* ETH_P_ARP */
3188                 pmConf->filters[i].mask[2] = 0x30; /* ARPOP_REQUEST */
3189                 pmConf->filters[i].mask[3] = 0x00;
3190                 pmConf->filters[i].mask[4] = 0xC0; /* IPv4 TIP */
3191                 pmConf->filters[i].mask[5] = 0x03; /* IPv4 TIP */
3192                 in_dev_put(in_dev);
3193
3194                 pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_FILTER;
3195                 i++;
3196         }
3197
3198 skip_arp:
3199         if (adapter->wol & WAKE_MAGIC)
3200                 pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_MAGIC;
3201
3202         pmConf->numFilters = i;
3203
3204         adapter->shared->devRead.pmConfDesc.confVer = cpu_to_le32(1);
3205         adapter->shared->devRead.pmConfDesc.confLen = cpu_to_le32(sizeof(
3206                                                                   *pmConf));
3207         adapter->shared->devRead.pmConfDesc.confPA = cpu_to_le64(virt_to_phys(
3208                                                                  pmConf));
3209
3210         spin_lock_irqsave(&adapter->cmd_lock, flags);
3211         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
3212                                VMXNET3_CMD_UPDATE_PMCFG);
3213         spin_unlock_irqrestore(&adapter->cmd_lock, flags);
3214
3215         pci_save_state(pdev);
3216         pci_enable_wake(pdev, pci_choose_state(pdev, PMSG_SUSPEND),
3217                         adapter->wol);
3218         pci_disable_device(pdev);
3219         pci_set_power_state(pdev, pci_choose_state(pdev, PMSG_SUSPEND));
3220
3221         return 0;
3222 }
3223
3224
3225 static int
3226 vmxnet3_resume(struct device *device)
3227 {
3228         int err, i = 0;
3229         unsigned long flags;
3230         struct pci_dev *pdev = to_pci_dev(device);
3231         struct net_device *netdev = pci_get_drvdata(pdev);
3232         struct vmxnet3_adapter *adapter = netdev_priv(netdev);
3233         struct Vmxnet3_PMConf *pmConf;
3234
3235         if (!netif_running(netdev))
3236                 return 0;
3237
3238         /* Destroy wake-up filters. */
3239         pmConf = adapter->pm_conf;
3240         memset(pmConf, 0, sizeof(*pmConf));
3241
3242         adapter->shared->devRead.pmConfDesc.confVer = cpu_to_le32(1);
3243         adapter->shared->devRead.pmConfDesc.confLen = cpu_to_le32(sizeof(
3244                                                                   *pmConf));
3245         adapter->shared->devRead.pmConfDesc.confPA = cpu_to_le64(virt_to_phys(
3246                                                                  pmConf));
3247
3248         netif_device_attach(netdev);
3249         pci_set_power_state(pdev, PCI_D0);
3250         pci_restore_state(pdev);
3251         err = pci_enable_device_mem(pdev);
3252         if (err != 0)
3253                 return err;
3254
3255         pci_enable_wake(pdev, PCI_D0, 0);
3256
3257         spin_lock_irqsave(&adapter->cmd_lock, flags);
3258         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
3259                                VMXNET3_CMD_UPDATE_PMCFG);
3260         spin_unlock_irqrestore(&adapter->cmd_lock, flags);
3261         vmxnet3_alloc_intr_resources(adapter);
3262         vmxnet3_request_irqs(adapter);
3263         for (i = 0; i < adapter->num_rx_queues; i++)
3264                 napi_enable(&adapter->rx_queue[i].napi);
3265         vmxnet3_enable_all_intrs(adapter);
3266
3267         return 0;
3268 }
3269
3270 static const struct dev_pm_ops vmxnet3_pm_ops = {
3271         .suspend = vmxnet3_suspend,
3272         .resume = vmxnet3_resume,
3273 };
3274 #endif
3275
3276 static struct pci_driver vmxnet3_driver = {
3277         .name           = vmxnet3_driver_name,
3278         .id_table       = vmxnet3_pciid_table,
3279         .probe          = vmxnet3_probe_device,
3280         .remove         = __devexit_p(vmxnet3_remove_device),
3281 #ifdef CONFIG_PM
3282         .driver.pm      = &vmxnet3_pm_ops,
3283 #endif
3284 };
3285
3286
3287 static int __init
3288 vmxnet3_init_module(void)
3289 {
3290         printk(KERN_INFO "%s - version %s\n", VMXNET3_DRIVER_DESC,
3291                 VMXNET3_DRIVER_VERSION_REPORT);
3292         return pci_register_driver(&vmxnet3_driver);
3293 }
3294
3295 module_init(vmxnet3_init_module);
3296
3297
3298 static void
3299 vmxnet3_exit_module(void)
3300 {
3301         pci_unregister_driver(&vmxnet3_driver);
3302 }
3303
3304 module_exit(vmxnet3_exit_module);
3305
3306 MODULE_AUTHOR("VMware, Inc.");
3307 MODULE_DESCRIPTION(VMXNET3_DRIVER_DESC);
3308 MODULE_LICENSE("GPL v2");
3309 MODULE_VERSION(VMXNET3_DRIVER_VERSION_STRING);