SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/net/enic/enic_main.c

   1 /*
   2  * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
   3  * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
   4  *
   5  * This program is free software; you may redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; version 2 of the License.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  10  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  11  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  12  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  13  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  14  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  15  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  16  * SOFTWARE.
  17  *
  18  */
  19
  20 #include <linux/module.h>
  21 #include <linux/kernel.h>
  22 #include <linux/string.h>
  23 #include <linux/errno.h>
  24 #include <linux/types.h>
  25 #include <linux/init.h>
  26 #include <linux/workqueue.h>
  27 #include <linux/pci.h>
  28 #include <linux/netdevice.h>
  29 #include <linux/etherdevice.h>
  30 #include <linux/if_ether.h>
  31 #include <linux/if_vlan.h>
  32 #include <linux/ethtool.h>
  33 #include <linux/in.h>
  34 #include <linux/ip.h>
  35 #include <linux/ipv6.h>
  36 #include <linux/tcp.h>
  37 #include <net/ip6_checksum.h>
  38
  39 #include "cq_enet_desc.h"
  40 #include "vnic_dev.h"
  41 #include "vnic_intr.h"
  42 #include "vnic_stats.h"
  43 #include "enic_res.h"
  44 #include "enic.h"
  45
  46 #define ENIC_NOTIFY_TIMER_PERIOD        (2 * HZ)
  47
  48 /* Supported devices */
  49 static struct pci_device_id enic_id_table[] = {
  50         { PCI_VDEVICE(CISCO, 0x0043) },
  51         { 0, }  /* end of table */
  52 };
  53
  54 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  55 MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>");
  56 MODULE_LICENSE("GPL");
  57 MODULE_VERSION(DRV_VERSION);
  58 MODULE_DEVICE_TABLE(pci, enic_id_table);
  59
  60 struct enic_stat {
  61         char name[ETH_GSTRING_LEN];
  62         unsigned int offset;
  63 };
  64
  65 #define ENIC_TX_STAT(stat)      \
  66         { .name = #stat, .offset = offsetof(struct vnic_tx_stats, stat) / 8 }
  67 #define ENIC_RX_STAT(stat)      \
  68         { .name = #stat, .offset = offsetof(struct vnic_rx_stats, stat) / 8 }
  69
  70 static const struct enic_stat enic_tx_stats[] = {
  71         ENIC_TX_STAT(tx_frames_ok),
  72         ENIC_TX_STAT(tx_unicast_frames_ok),
  73         ENIC_TX_STAT(tx_multicast_frames_ok),
  74         ENIC_TX_STAT(tx_broadcast_frames_ok),
  75         ENIC_TX_STAT(tx_bytes_ok),
  76         ENIC_TX_STAT(tx_unicast_bytes_ok),
  77         ENIC_TX_STAT(tx_multicast_bytes_ok),
  78         ENIC_TX_STAT(tx_broadcast_bytes_ok),
  79         ENIC_TX_STAT(tx_drops),
  80         ENIC_TX_STAT(tx_errors),
  81         ENIC_TX_STAT(tx_tso),
  82 };
  83
  84 static const struct enic_stat enic_rx_stats[] = {
  85         ENIC_RX_STAT(rx_frames_ok),
  86         ENIC_RX_STAT(rx_frames_total),
  87         ENIC_RX_STAT(rx_unicast_frames_ok),
  88         ENIC_RX_STAT(rx_multicast_frames_ok),
  89         ENIC_RX_STAT(rx_broadcast_frames_ok),
  90         ENIC_RX_STAT(rx_bytes_ok),
  91         ENIC_RX_STAT(rx_unicast_bytes_ok),
  92         ENIC_RX_STAT(rx_multicast_bytes_ok),
  93         ENIC_RX_STAT(rx_broadcast_bytes_ok),
  94         ENIC_RX_STAT(rx_drop),
  95         ENIC_RX_STAT(rx_no_bufs),
  96         ENIC_RX_STAT(rx_errors),
  97         ENIC_RX_STAT(rx_rss),
  98         ENIC_RX_STAT(rx_crc_errors),
  99         ENIC_RX_STAT(rx_frames_64),
 100         ENIC_RX_STAT(rx_frames_127),
 101         ENIC_RX_STAT(rx_frames_255),
 102         ENIC_RX_STAT(rx_frames_511),
 103         ENIC_RX_STAT(rx_frames_1023),
 104         ENIC_RX_STAT(rx_frames_1518),
 105         ENIC_RX_STAT(rx_frames_to_max),
 106 };
 107
 108 static const unsigned int enic_n_tx_stats = ARRAY_SIZE(enic_tx_stats);
 109 static const unsigned int enic_n_rx_stats = ARRAY_SIZE(enic_rx_stats);
 110
 111 static int enic_get_settings(struct net_device *netdev,
 112         struct ethtool_cmd *ecmd)
 113 {
 114         struct enic *enic = netdev_priv(netdev);
 115
 116         ecmd->supported = (SUPPORTED_10000baseT_Full | SUPPORTED_FIBRE);
 117         ecmd->advertising = (ADVERTISED_10000baseT_Full | ADVERTISED_FIBRE);
 118         ecmd->port = PORT_FIBRE;
 119         ecmd->transceiver = XCVR_EXTERNAL;
 120
 121         if (netif_carrier_ok(netdev)) {
 122                 ecmd->speed = vnic_dev_port_speed(enic->vdev);
 123                 ecmd->duplex = DUPLEX_FULL;
 124         } else {
 125                 ecmd->speed = -1;
 126                 ecmd->duplex = -1;
 127         }
 128
 129         ecmd->autoneg = AUTONEG_DISABLE;
 130
 131         return 0;
 132 }
 133
 134 static void enic_get_drvinfo(struct net_device *netdev,
 135         struct ethtool_drvinfo *drvinfo)
 136 {
 137         struct enic *enic = netdev_priv(netdev);
 138         struct vnic_devcmd_fw_info *fw_info;
 139
 140         spin_lock(&enic->devcmd_lock);
 141         vnic_dev_fw_info(enic->vdev, &fw_info);
 142         spin_unlock(&enic->devcmd_lock);
 143
 144         strncpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
 145         strncpy(drvinfo->version, DRV_VERSION, sizeof(drvinfo->version));
 146         strncpy(drvinfo->fw_version, fw_info->fw_version,
 147                 sizeof(drvinfo->fw_version));
 148         strncpy(drvinfo->bus_info, pci_name(enic->pdev),
 149                 sizeof(drvinfo->bus_info));
 150 }
 151
 152 static void enic_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
 153 {
 154         unsigned int i;
 155
 156         switch (stringset) {
 157         case ETH_SS_STATS:
 158                 for (i = 0; i < enic_n_tx_stats; i++) {
 159                         memcpy(data, enic_tx_stats[i].name, ETH_GSTRING_LEN);
 160                         data += ETH_GSTRING_LEN;
 161                 }
 162                 for (i = 0; i < enic_n_rx_stats; i++) {
 163                         memcpy(data, enic_rx_stats[i].name, ETH_GSTRING_LEN);
 164                         data += ETH_GSTRING_LEN;
 165                 }
 166                 break;
 167         }
 168 }
 169
 170 static int enic_get_sset_count(struct net_device *netdev, int sset)
 171 {
 172         switch (sset) {
 173         case ETH_SS_STATS:
 174                 return enic_n_tx_stats + enic_n_rx_stats;
 175         default:
 176                 return -EOPNOTSUPP;
 177         }
 178 }
 179
 180 static void enic_get_ethtool_stats(struct net_device *netdev,
 181         struct ethtool_stats *stats, u64 *data)
 182 {
 183         struct enic *enic = netdev_priv(netdev);
 184         struct vnic_stats *vstats;
 185         unsigned int i;
 186
 187         spin_lock(&enic->devcmd_lock);
 188         vnic_dev_stats_dump(enic->vdev, &vstats);
 189         spin_unlock(&enic->devcmd_lock);
 190
 191         for (i = 0; i < enic_n_tx_stats; i++)
 192                 *(data++) = ((u64 *)&vstats->tx)[enic_tx_stats[i].offset];
 193         for (i = 0; i < enic_n_rx_stats; i++)
 194                 *(data++) = ((u64 *)&vstats->rx)[enic_rx_stats[i].offset];
 195 }
 196
 197 static u32 enic_get_rx_csum(struct net_device *netdev)
 198 {
 199         struct enic *enic = netdev_priv(netdev);
 200         return enic->csum_rx_enabled;
 201 }
 202
 203 static int enic_set_rx_csum(struct net_device *netdev, u32 data)
 204 {
 205         struct enic *enic = netdev_priv(netdev);
 206
 207         if (data && !ENIC_SETTING(enic, RXCSUM))
 208                 return -EINVAL;
 209
 210         enic->csum_rx_enabled = !!data;
 211
 212         return 0;
 213 }
 214
 215 static int enic_set_tx_csum(struct net_device *netdev, u32 data)
 216 {
 217         struct enic *enic = netdev_priv(netdev);
 218
 219         if (data && !ENIC_SETTING(enic, TXCSUM))
 220                 return -EINVAL;
 221
 222         if (data)
 223                 netdev->features |= NETIF_F_HW_CSUM;
 224         else
 225                 netdev->features &= ~NETIF_F_HW_CSUM;
 226
 227         return 0;
 228 }
 229
 230 static int enic_set_tso(struct net_device *netdev, u32 data)
 231 {
 232         struct enic *enic = netdev_priv(netdev);
 233
 234         if (data && !ENIC_SETTING(enic, TSO))
 235                 return -EINVAL;
 236
 237         if (data)
 238                 netdev->features |=
 239                         NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN;
 240         else
 241                 netdev->features &=
 242                         ~(NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN);
 243
 244         return 0;
 245 }
 246
 247 static u32 enic_get_msglevel(struct net_device *netdev)
 248 {
 249         struct enic *enic = netdev_priv(netdev);
 250         return enic->msg_enable;
 251 }
 252
 253 static void enic_set_msglevel(struct net_device *netdev, u32 value)
 254 {
 255         struct enic *enic = netdev_priv(netdev);
 256         enic->msg_enable = value;
 257 }
 258
 259 static struct ethtool_ops enic_ethtool_ops = {
 260         .get_settings = enic_get_settings,
 261         .get_drvinfo = enic_get_drvinfo,
 262         .get_msglevel = enic_get_msglevel,
 263         .set_msglevel = enic_set_msglevel,
 264         .get_link = ethtool_op_get_link,
 265         .get_strings = enic_get_strings,
 266         .get_sset_count = enic_get_sset_count,
 267         .get_ethtool_stats = enic_get_ethtool_stats,
 268         .get_rx_csum = enic_get_rx_csum,
 269         .set_rx_csum = enic_set_rx_csum,
 270         .get_tx_csum = ethtool_op_get_tx_csum,
 271         .set_tx_csum = enic_set_tx_csum,
 272         .get_sg = ethtool_op_get_sg,
 273         .set_sg = ethtool_op_set_sg,
 274         .get_tso = ethtool_op_get_tso,
 275         .set_tso = enic_set_tso,
 276         .get_flags = ethtool_op_get_flags,
 277         .set_flags = ethtool_op_set_flags,
 278 };
 279
 280 static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
 281 {
 282         struct enic *enic = vnic_dev_priv(wq->vdev);
 283
 284         if (buf->sop)
 285                 pci_unmap_single(enic->pdev, buf->dma_addr,
 286                         buf->len, PCI_DMA_TODEVICE);
 287         else
 288                 pci_unmap_page(enic->pdev, buf->dma_addr,
 289                         buf->len, PCI_DMA_TODEVICE);
 290
 291         if (buf->os_buf)
 292                 dev_kfree_skb_any(buf->os_buf);
 293 }
 294
 295 static void enic_wq_free_buf(struct vnic_wq *wq,
 296         struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque)
 297 {
 298         enic_free_wq_buf(wq, buf);
 299 }
 300
 301 static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
 302         u8 type, u16 q_number, u16 completed_index, void *opaque)
 303 {
 304         struct enic *enic = vnic_dev_priv(vdev);
 305
 306         spin_lock(&enic->wq_lock[q_number]);
 307
 308         vnic_wq_service(&enic->wq[q_number], cq_desc,
 309                 completed_index, enic_wq_free_buf,
 310                 opaque);
 311
 312         if (netif_queue_stopped(enic->netdev) &&
 313             vnic_wq_desc_avail(&enic->wq[q_number]) >= MAX_SKB_FRAGS + 1)
 314                 netif_wake_queue(enic->netdev);
 315
 316         spin_unlock(&enic->wq_lock[q_number]);
 317
 318         return 0;
 319 }
 320
 321 static void enic_log_q_error(struct enic *enic)
 322 {
 323         unsigned int i;
 324         u32 error_status;
 325
 326         for (i = 0; i < enic->wq_count; i++) {
 327                 error_status = vnic_wq_error_status(&enic->wq[i]);
 328                 if (error_status)
 329                         printk(KERN_ERR PFX "%s: WQ[%d] error_status %d\n",
 330                                 enic->netdev->name, i, error_status);
 331         }
 332
 333         for (i = 0; i < enic->rq_count; i++) {
 334                 error_status = vnic_rq_error_status(&enic->rq[i]);
 335                 if (error_status)
 336                         printk(KERN_ERR PFX "%s: RQ[%d] error_status %d\n",
 337                                 enic->netdev->name, i, error_status);
 338         }
 339 }
 340
 341 static void enic_link_check(struct enic *enic)
 342 {
 343         int link_status = vnic_dev_link_status(enic->vdev);
 344         int carrier_ok = netif_carrier_ok(enic->netdev);
 345
 346         if (link_status && !carrier_ok) {
 347                 printk(KERN_INFO PFX "%s: Link UP\n", enic->netdev->name);
 348                 netif_carrier_on(enic->netdev);
 349         } else if (!link_status && carrier_ok) {
 350                 printk(KERN_INFO PFX "%s: Link DOWN\n", enic->netdev->name);
 351                 netif_carrier_off(enic->netdev);
 352         }
 353 }
 354
 355 static void enic_mtu_check(struct enic *enic)
 356 {
 357         u32 mtu = vnic_dev_mtu(enic->vdev);
 358
 359         if (mtu != enic->port_mtu) {
 360                 if (mtu < enic->netdev->mtu)
 361                         printk(KERN_WARNING PFX
 362                                 "%s: interface MTU (%d) set higher "
 363                                 "than switch port MTU (%d)\n",
 364                                 enic->netdev->name, enic->netdev->mtu, mtu);
 365                 enic->port_mtu = mtu;
 366         }
 367 }
 368
 369 static void enic_msglvl_check(struct enic *enic)
 370 {
 371         u32 msg_enable = vnic_dev_msg_lvl(enic->vdev);
 372
 373         if (msg_enable != enic->msg_enable) {
 374                 printk(KERN_INFO PFX "%s: msg lvl changed from 0x%x to 0x%x\n",
 375                         enic->netdev->name, enic->msg_enable, msg_enable);
 376                 enic->msg_enable = msg_enable;
 377         }
 378 }
 379
 380 static void enic_notify_check(struct enic *enic)
 381 {
 382         enic_msglvl_check(enic);
 383         enic_mtu_check(enic);
 384         enic_link_check(enic);
 385 }
 386
 387 #define ENIC_TEST_INTR(pba, i) (pba & (1 << i))
 388
 389 static irqreturn_t enic_isr_legacy(int irq, void *data)
 390 {
 391         struct net_device *netdev = data;
 392         struct enic *enic = netdev_priv(netdev);
 393         u32 pba;
 394
 395         vnic_intr_mask(&enic->intr[ENIC_INTX_WQ_RQ]);
 396
 397         pba = vnic_intr_legacy_pba(enic->legacy_pba);
 398         if (!pba) {
 399                 vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]);
 400                 return IRQ_NONE;        /* not our interrupt */
 401         }
 402
 403         if (ENIC_TEST_INTR(pba, ENIC_INTX_NOTIFY)) {
 404                 vnic_intr_return_all_credits(&enic->intr[ENIC_INTX_NOTIFY]);
 405                 enic_notify_check(enic);
 406         }
 407
 408         if (ENIC_TEST_INTR(pba, ENIC_INTX_ERR)) {
 409                 vnic_intr_return_all_credits(&enic->intr[ENIC_INTX_ERR]);
 410                 enic_log_q_error(enic);
 411                 /* schedule recovery from WQ/RQ error */
 412                 schedule_work(&enic->reset);
 413                 return IRQ_HANDLED;
 414         }
 415
 416         if (ENIC_TEST_INTR(pba, ENIC_INTX_WQ_RQ)) {
 417                 if (napi_schedule_prep(&enic->napi))
 418                         __napi_schedule(&enic->napi);
 419         } else {
 420                 vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]);
 421         }
 422
 423         return IRQ_HANDLED;
 424 }
 425
 426 static irqreturn_t enic_isr_msi(int irq, void *data)
 427 {
 428         struct enic *enic = data;
 429
 430         /* With MSI, there is no sharing of interrupts, so this is
 431          * our interrupt and there is no need to ack it.  The device
 432          * is not providing per-vector masking, so the OS will not
 433          * write to PCI config space to mask/unmask the interrupt.
 434          * We're using mask_on_assertion for MSI, so the device
 435          * automatically masks the interrupt when the interrupt is
 436          * generated.  Later, when exiting polling, the interrupt
 437          * will be unmasked (see enic_poll).
 438          *
 439          * Also, the device uses the same PCIe Traffic Class (TC)
 440          * for Memory Write data and MSI, so there are no ordering
 441          * issues; the MSI will always arrive at the Root Complex
 442          * _after_ corresponding Memory Writes (i.e. descriptor
 443          * writes).
 444          */
 445
 446         napi_schedule(&enic->napi);
 447
 448         return IRQ_HANDLED;
 449 }
 450
 451 static irqreturn_t enic_isr_msix_rq(int irq, void *data)
 452 {
 453         struct enic *enic = data;
 454
 455         /* schedule NAPI polling for RQ cleanup */
 456         napi_schedule(&enic->napi);
 457
 458         return IRQ_HANDLED;
 459 }
 460
 461 static irqreturn_t enic_isr_msix_wq(int irq, void *data)
 462 {
 463         struct enic *enic = data;
 464         unsigned int wq_work_to_do = -1; /* no limit */
 465         unsigned int wq_work_done;
 466
 467         wq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_WQ],
 468                 wq_work_to_do, enic_wq_service, NULL);
 469
 470         vnic_intr_return_credits(&enic->intr[ENIC_MSIX_WQ],
 471                 wq_work_done,
 472                 1 /* unmask intr */,
 473                 1 /* reset intr timer */);
 474
 475         return IRQ_HANDLED;
 476 }
 477
 478 static irqreturn_t enic_isr_msix_err(int irq, void *data)
 479 {
 480         struct enic *enic = data;
 481
 482         vnic_intr_return_all_credits(&enic->intr[ENIC_MSIX_ERR]);
 483
 484         enic_log_q_error(enic);
 485
 486         /* schedule recovery from WQ/RQ error */
 487         schedule_work(&enic->reset);
 488
 489         return IRQ_HANDLED;
 490 }
 491
 492 static irqreturn_t enic_isr_msix_notify(int irq, void *data)
 493 {
 494         struct enic *enic = data;
 495
 496         vnic_intr_return_all_credits(&enic->intr[ENIC_MSIX_NOTIFY]);
 497         enic_notify_check(enic);
 498
 499         return IRQ_HANDLED;
 500 }
 501
 502 static inline void enic_queue_wq_skb_cont(struct enic *enic,
 503         struct vnic_wq *wq, struct sk_buff *skb,
 504         unsigned int len_left)
 505 {
 506         skb_frag_t *frag;
 507
 508         /* Queue additional data fragments */
 509         for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
 510                 len_left -= frag->size;
 511                 enic_queue_wq_desc_cont(wq, skb,
 512                         pci_map_page(enic->pdev, frag->page,
 513                                 frag->page_offset, frag->size,
 514                                 PCI_DMA_TODEVICE),
 515                         frag->size,
 516                         (len_left == 0));       /* EOP? */
 517         }
 518 }
 519
 520 static inline void enic_queue_wq_skb_vlan(struct enic *enic,
 521         struct vnic_wq *wq, struct sk_buff *skb,
 522         int vlan_tag_insert, unsigned int vlan_tag)
 523 {
 524         unsigned int head_len = skb_headlen(skb);
 525         unsigned int len_left = skb->len - head_len;
 526         int eop = (len_left == 0);
 527
 528         /* Queue the main skb fragment */
 529         enic_queue_wq_desc(wq, skb,
 530                 pci_map_single(enic->pdev, skb->data,
 531                         head_len, PCI_DMA_TODEVICE),
 532                 head_len,
 533                 vlan_tag_insert, vlan_tag,
 534                 eop);
 535
 536         if (!eop)
 537                 enic_queue_wq_skb_cont(enic, wq, skb, len_left);
 538 }
 539
 540 static inline void enic_queue_wq_skb_csum_l4(struct enic *enic,
 541         struct vnic_wq *wq, struct sk_buff *skb,
 542         int vlan_tag_insert, unsigned int vlan_tag)
 543 {
 544         unsigned int head_len = skb_headlen(skb);
 545         unsigned int len_left = skb->len - head_len;
 546         unsigned int hdr_len = skb_transport_offset(skb);
 547         unsigned int csum_offset = hdr_len + skb->csum_offset;
 548         int eop = (len_left == 0);
 549
 550         /* Queue the main skb fragment */
 551         enic_queue_wq_desc_csum_l4(wq, skb,
 552                 pci_map_single(enic->pdev, skb->data,
 553                         head_len, PCI_DMA_TODEVICE),
 554                 head_len,
 555                 csum_offset,
 556                 hdr_len,
 557                 vlan_tag_insert, vlan_tag,
 558                 eop);
 559
 560         if (!eop)
 561                 enic_queue_wq_skb_cont(enic, wq, skb, len_left);
 562 }
 563
 564 static inline void enic_queue_wq_skb_tso(struct enic *enic,
 565         struct vnic_wq *wq, struct sk_buff *skb, unsigned int mss,
 566         int vlan_tag_insert, unsigned int vlan_tag)
 567 {
 568         unsigned int head_len = skb_headlen(skb);
 569         unsigned int len_left = skb->len - head_len;
 570         unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
 571         int eop = (len_left == 0);
 572
 573         /* Preload TCP csum field with IP pseudo hdr calculated
 574          * with IP length set to zero.  HW will later add in length
 575          * to each TCP segment resulting from the TSO.
 576          */
 577
 578         if (skb->protocol == cpu_to_be16(ETH_P_IP)) {
 579                 ip_hdr(skb)->check = 0;
 580                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr,
 581                         ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
 582         } else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) {
 583                 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
 584                         &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
 585         }
 586
 587         /* Queue the main skb fragment */
 588         enic_queue_wq_desc_tso(wq, skb,
 589                 pci_map_single(enic->pdev, skb->data,
 590                         head_len, PCI_DMA_TODEVICE),
 591                 head_len,
 592                 mss, hdr_len,
 593                 vlan_tag_insert, vlan_tag,
 594                 eop);
 595
 596         if (!eop)
 597                 enic_queue_wq_skb_cont(enic, wq, skb, len_left);
 598 }
 599
 600 static inline void enic_queue_wq_skb(struct enic *enic,
 601         struct vnic_wq *wq, struct sk_buff *skb)
 602 {
 603         unsigned int mss = skb_shinfo(skb)->gso_size;
 604         unsigned int vlan_tag = 0;
 605         int vlan_tag_insert = 0;
 606
 607         if (enic->vlan_group && vlan_tx_tag_present(skb)) {
 608                 /* VLAN tag from trunking driver */
 609                 vlan_tag_insert = 1;
 610                 vlan_tag = vlan_tx_tag_get(skb);
 611         }
 612
 613         if (mss)
 614                 enic_queue_wq_skb_tso(enic, wq, skb, mss,
 615                         vlan_tag_insert, vlan_tag);
 616         else if (skb->ip_summed == CHECKSUM_PARTIAL)
 617                 enic_queue_wq_skb_csum_l4(enic, wq, skb,
 618                         vlan_tag_insert, vlan_tag);
 619         else
 620                 enic_queue_wq_skb_vlan(enic, wq, skb,
 621                         vlan_tag_insert, vlan_tag);
 622 }
 623
 624 /* netif_tx_lock held, process context with BHs disabled, or BH */
 625 static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb,
 626                                               struct net_device *netdev)
 627 {
 628         struct enic *enic = netdev_priv(netdev);
 629         struct vnic_wq *wq = &enic->wq[0];
 630         unsigned long flags;
 631
 632         if (skb->len <= 0) {
 633                 dev_kfree_skb(skb);
 634                 return NETDEV_TX_OK;
 635         }
 636
 637         /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs,
 638          * which is very likely.  In the off chance it's going to take
 639          * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb.
 640          */
 641
 642         if (skb_shinfo(skb)->gso_size == 0 &&
 643             skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC &&
 644             skb_linearize(skb)) {
 645                 dev_kfree_skb(skb);
 646                 return NETDEV_TX_OK;
 647         }
 648
 649         spin_lock_irqsave(&enic->wq_lock[0], flags);
 650
 651         if (vnic_wq_desc_avail(wq) < skb_shinfo(skb)->nr_frags + 1) {
 652                 netif_stop_queue(netdev);
 653                 /* This is a hard error, log it */
 654                 printk(KERN_ERR PFX "%s: BUG! Tx ring full when "
 655                         "queue awake!\n", netdev->name);
 656                 spin_unlock_irqrestore(&enic->wq_lock[0], flags);
 657                 return NETDEV_TX_BUSY;
 658         }
 659
 660         enic_queue_wq_skb(enic, wq, skb);
 661
 662         if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + 1)
 663                 netif_stop_queue(netdev);
 664
 665         spin_unlock_irqrestore(&enic->wq_lock[0], flags);
 666
 667         return NETDEV_TX_OK;
 668 }
 669
 670 /* dev_base_lock rwlock held, nominally process context */
 671 static struct net_device_stats *enic_get_stats(struct net_device *netdev)
 672 {
 673         struct enic *enic = netdev_priv(netdev);
 674         struct net_device_stats *net_stats = &netdev->stats;
 675         struct vnic_stats *stats;
 676
 677         spin_lock(&enic->devcmd_lock);
 678         vnic_dev_stats_dump(enic->vdev, &stats);
 679         spin_unlock(&enic->devcmd_lock);
 680
 681         net_stats->tx_packets = stats->tx.tx_frames_ok;
 682         net_stats->tx_bytes = stats->tx.tx_bytes_ok;
 683         net_stats->tx_errors = stats->tx.tx_errors;
 684         net_stats->tx_dropped = stats->tx.tx_drops;
 685
 686         net_stats->rx_packets = stats->rx.rx_frames_ok;
 687         net_stats->rx_bytes = stats->rx.rx_bytes_ok;
 688         net_stats->rx_errors = stats->rx.rx_errors;
 689         net_stats->multicast = stats->rx.rx_multicast_frames_ok;
 690         net_stats->rx_crc_errors = enic->rq_bad_fcs;
 691         net_stats->rx_dropped = stats->rx.rx_no_bufs;
 692
 693         return net_stats;
 694 }
 695
 696 static void enic_reset_mcaddrs(struct enic *enic)
 697 {
 698         enic->mc_count = 0;
 699 }
 700
 701 static int enic_set_mac_addr(struct net_device *netdev, char *addr)
 702 {
 703         if (!is_valid_ether_addr(addr))
 704                 return -EADDRNOTAVAIL;
 705
 706         memcpy(netdev->dev_addr, addr, netdev->addr_len);
 707
 708         return 0;
 709 }
 710
 711 /* netif_tx_lock held, BHs disabled */
 712 static void enic_set_multicast_list(struct net_device *netdev)
 713 {
 714         struct enic *enic = netdev_priv(netdev);
 715         struct dev_mc_list *list = netdev->mc_list;
 716         int directed = 1;
 717         int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0;
 718         int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0;
 719         int promisc = (netdev->flags & IFF_PROMISC) ? 1 : 0;
 720         int allmulti = (netdev->flags & IFF_ALLMULTI) ||
 721             (netdev->mc_count > ENIC_MULTICAST_PERFECT_FILTERS);
 722         u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN];
 723         unsigned int mc_count = netdev->mc_count;
 724         unsigned int i, j;
 725
 726         if (mc_count > ENIC_MULTICAST_PERFECT_FILTERS)
 727                 mc_count = ENIC_MULTICAST_PERFECT_FILTERS;
 728
 729         spin_lock(&enic->devcmd_lock);
 730
 731         vnic_dev_packet_filter(enic->vdev, directed,
 732                 multicast, broadcast, promisc, allmulti);
 733
 734         /* Is there an easier way?  Trying to minimize to
 735          * calls to add/del multicast addrs.  We keep the
 736          * addrs from the last call in enic->mc_addr and
 737          * look for changes to add/del.
 738          */
 739
 740         for (i = 0; list && i < mc_count; i++) {
 741                 memcpy(mc_addr[i], list->dmi_addr, ETH_ALEN);
 742                 list = list->next;
 743         }
 744
 745         for (i = 0; i < enic->mc_count; i++) {
 746                 for (j = 0; j < mc_count; j++)
 747                         if (compare_ether_addr(enic->mc_addr[i],
 748                                 mc_addr[j]) == 0)
 749                                 break;
 750                 if (j == mc_count)
 751                         enic_del_multicast_addr(enic, enic->mc_addr[i]);
 752         }
 753
 754         for (i = 0; i < mc_count; i++) {
 755                 for (j = 0; j < enic->mc_count; j++)
 756                         if (compare_ether_addr(mc_addr[i],
 757                                 enic->mc_addr[j]) == 0)
 758                                 break;
 759                 if (j == enic->mc_count)
 760                         enic_add_multicast_addr(enic, mc_addr[i]);
 761         }
 762
 763         /* Save the list to compare against next time
 764          */
 765
 766         for (i = 0; i < mc_count; i++)
 767                 memcpy(enic->mc_addr[i], mc_addr[i], ETH_ALEN);
 768
 769         enic->mc_count = mc_count;
 770
 771         spin_unlock(&enic->devcmd_lock);
 772 }
 773
 774 /* rtnl lock is held */
 775 static void enic_vlan_rx_register(struct net_device *netdev,
 776         struct vlan_group *vlan_group)
 777 {
 778         struct enic *enic = netdev_priv(netdev);
 779         enic->vlan_group = vlan_group;
 780 }
 781
 782 /* rtnl lock is held */
 783 static void enic_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
 784 {
 785         struct enic *enic = netdev_priv(netdev);
 786
 787         spin_lock(&enic->devcmd_lock);
 788         enic_add_vlan(enic, vid);
 789         spin_unlock(&enic->devcmd_lock);
 790 }
 791
 792 /* rtnl lock is held */
 793 static void enic_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
 794 {
 795         struct enic *enic = netdev_priv(netdev);
 796
 797         spin_lock(&enic->devcmd_lock);
 798         enic_del_vlan(enic, vid);
 799         spin_unlock(&enic->devcmd_lock);
 800 }
 801
 802 /* netif_tx_lock held, BHs disabled */
 803 static void enic_tx_timeout(struct net_device *netdev)
 804 {
 805         struct enic *enic = netdev_priv(netdev);
 806         schedule_work(&enic->reset);
 807 }
 808
 809 static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
 810 {
 811         struct enic *enic = vnic_dev_priv(rq->vdev);
 812
 813         if (!buf->os_buf)
 814                 return;
 815
 816         pci_unmap_single(enic->pdev, buf->dma_addr,
 817                 buf->len, PCI_DMA_FROMDEVICE);
 818         dev_kfree_skb_any(buf->os_buf);
 819 }
 820
 821 static inline struct sk_buff *enic_rq_alloc_skb(unsigned int size)
 822 {
 823         struct sk_buff *skb;
 824
 825         skb = dev_alloc_skb(size + NET_IP_ALIGN);
 826
 827         if (skb)
 828                 skb_reserve(skb, NET_IP_ALIGN);
 829
 830         return skb;
 831 }
 832
 833 static int enic_rq_alloc_buf(struct vnic_rq *rq)
 834 {
 835         struct enic *enic = vnic_dev_priv(rq->vdev);
 836         struct sk_buff *skb;
 837         unsigned int len = enic->netdev->mtu + ETH_HLEN;
 838         unsigned int os_buf_index = 0;
 839         dma_addr_t dma_addr;
 840
 841         skb = enic_rq_alloc_skb(len);
 842         if (!skb)
 843                 return -ENOMEM;
 844
 845         dma_addr = pci_map_single(enic->pdev, skb->data,
 846                 len, PCI_DMA_FROMDEVICE);
 847
 848         enic_queue_rq_desc(rq, skb, os_buf_index,
 849                 dma_addr, len);
 850
 851         return 0;
 852 }
 853
 854 static int enic_get_skb_header(struct sk_buff *skb, void **iphdr,
 855         void **tcph, u64 *hdr_flags, void *priv)
 856 {
 857         struct cq_enet_rq_desc *cq_desc = priv;
 858         unsigned int ip_len;
 859         struct iphdr *iph;
 860
 861         u8 type, color, eop, sop, ingress_port, vlan_stripped;
 862         u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
 863         u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
 864         u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
 865         u8 packet_error;
 866         u16 q_number, completed_index, bytes_written, vlan, checksum;
 867         u32 rss_hash;
 868
 869         cq_enet_rq_desc_dec(cq_desc,
 870                 &type, &color, &q_number, &completed_index,
 871                 &ingress_port, &fcoe, &eop, &sop, &rss_type,
 872                 &csum_not_calc, &rss_hash, &bytes_written,
 873                 &packet_error, &vlan_stripped, &vlan, &checksum,
 874                 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
 875                 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
 876                 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
 877                 &fcs_ok);
 878
 879         if (!(ipv4 && tcp && !ipv4_fragment))
 880                 return -1;
 881
 882         skb_reset_network_header(skb);
 883         iph = ip_hdr(skb);
 884
 885         ip_len = ip_hdrlen(skb);
 886         skb_set_transport_header(skb, ip_len);
 887
 888         /* check if ip header and tcp header are complete */
 889         if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb))
 890                 return -1;
 891
 892         *hdr_flags = LRO_IPV4 | LRO_TCP;
 893         *tcph = tcp_hdr(skb);
 894         *iphdr = iph;
 895
 896         return 0;
 897 }
 898
 899 static void enic_rq_indicate_buf(struct vnic_rq *rq,
 900         struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
 901         int skipped, void *opaque)
 902 {
 903         struct enic *enic = vnic_dev_priv(rq->vdev);
 904         struct net_device *netdev = enic->netdev;
 905         struct sk_buff *skb;
 906
 907         u8 type, color, eop, sop, ingress_port, vlan_stripped;
 908         u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
 909         u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
 910         u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
 911         u8 packet_error;
 912         u16 q_number, completed_index, bytes_written, vlan, checksum;
 913         u32 rss_hash;
 914
 915         if (skipped)
 916                 return;
 917
 918         skb = buf->os_buf;
 919         prefetch(skb->data - NET_IP_ALIGN);
 920         pci_unmap_single(enic->pdev, buf->dma_addr,
 921                 buf->len, PCI_DMA_FROMDEVICE);
 922
 923         cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
 924                 &type, &color, &q_number, &completed_index,
 925                 &ingress_port, &fcoe, &eop, &sop, &rss_type,
 926                 &csum_not_calc, &rss_hash, &bytes_written,
 927                 &packet_error, &vlan_stripped, &vlan, &checksum,
 928                 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
 929                 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
 930                 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
 931                 &fcs_ok);
 932
 933         if (packet_error) {
 934
 935                 if (bytes_written > 0 && !fcs_ok)
 936                         enic->rq_bad_fcs++;
 937
 938                 dev_kfree_skb_any(skb);
 939
 940                 return;
 941         }
 942
 943         if (eop && bytes_written > 0) {
 944
 945                 /* Good receive
 946                  */
 947
 948                 skb_put(skb, bytes_written);
 949                 skb->protocol = eth_type_trans(skb, netdev);
 950
 951                 if (enic->csum_rx_enabled && !csum_not_calc) {
 952                         skb->csum = htons(checksum);
 953                         skb->ip_summed = CHECKSUM_COMPLETE;
 954                 }
 955
 956                 skb->dev = netdev;
 957
 958                 if (enic->vlan_group && vlan_stripped) {
 959
 960                         if ((netdev->features & NETIF_F_LRO) && ipv4)
 961                                 lro_vlan_hwaccel_receive_skb(&enic->lro_mgr,
 962                                         skb, enic->vlan_group,
 963                                         vlan, cq_desc);
 964                         else
 965                                 vlan_hwaccel_receive_skb(skb,
 966                                         enic->vlan_group, vlan);
 967
 968                 } else {
 969
 970                         if ((netdev->features & NETIF_F_LRO) && ipv4)
 971                                 lro_receive_skb(&enic->lro_mgr, skb, cq_desc);
 972                         else
 973                                 netif_receive_skb(skb);
 974
 975                 }
 976
 977         } else {
 978
 979                 /* Buffer overflow
 980                  */
 981
 982                 dev_kfree_skb_any(skb);
 983         }
 984 }
 985
 986 static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
 987         u8 type, u16 q_number, u16 completed_index, void *opaque)
 988 {
 989         struct enic *enic = vnic_dev_priv(vdev);
 990
 991         vnic_rq_service(&enic->rq[q_number], cq_desc,
 992                 completed_index, VNIC_RQ_RETURN_DESC,
 993                 enic_rq_indicate_buf, opaque);
 994
 995         return 0;
 996 }
 997
 998 static void enic_rq_drop_buf(struct vnic_rq *rq,
 999         struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
1000         int skipped, void *opaque)
1001 {
1002         struct enic *enic = vnic_dev_priv(rq->vdev);
1003         struct sk_buff *skb = buf->os_buf;
1004
1005         if (skipped)
1006                 return;
1007
1008         pci_unmap_single(enic->pdev, buf->dma_addr,
1009                 buf->len, PCI_DMA_FROMDEVICE);
1010
1011         dev_kfree_skb_any(skb);
1012 }
1013
1014 static int enic_rq_service_drop(struct vnic_dev *vdev, struct cq_desc *cq_desc,
1015         u8 type, u16 q_number, u16 completed_index, void *opaque)
1016 {
1017         struct enic *enic = vnic_dev_priv(vdev);
1018
1019         vnic_rq_service(&enic->rq[q_number], cq_desc,
1020                 completed_index, VNIC_RQ_RETURN_DESC,
1021                 enic_rq_drop_buf, opaque);
1022
1023         return 0;
1024 }
1025
1026 static int enic_poll(struct napi_struct *napi, int budget)
1027 {
1028         struct enic *enic = container_of(napi, struct enic, napi);
1029         struct net_device *netdev = enic->netdev;
1030         unsigned int rq_work_to_do = budget;
1031         unsigned int wq_work_to_do = -1; /* no limit */
1032         unsigned int  work_done, rq_work_done, wq_work_done;
1033
1034         /* Service RQ (first) and WQ
1035          */
1036
1037         rq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_RQ],
1038                 rq_work_to_do, enic_rq_service, NULL);
1039
1040         wq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_WQ],
1041                 wq_work_to_do, enic_wq_service, NULL);
1042
1043         /* Accumulate intr event credits for this polling
1044          * cycle.  An intr event is the completion of a
1045          * a WQ or RQ packet.
1046          */
1047
1048         work_done = rq_work_done + wq_work_done;
1049
1050         if (work_done > 0)
1051                 vnic_intr_return_credits(&enic->intr[ENIC_INTX_WQ_RQ],
1052                         work_done,
1053                         0 /* don't unmask intr */,
1054                         0 /* don't reset intr timer */);
1055
1056         if (rq_work_done > 0) {
1057
1058                 /* Replenish RQ
1059                  */
1060
1061                 vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1062
1063         } else {
1064
1065                 /* If no work done, flush all LROs and exit polling
1066                  */
1067
1068                 if (netdev->features & NETIF_F_LRO)
1069                         lro_flush_all(&enic->lro_mgr);
1070
1071                 napi_complete(napi);
1072                 vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]);
1073         }
1074
1075         return rq_work_done;
1076 }
1077
1078 static int enic_poll_msix(struct napi_struct *napi, int budget)
1079 {
1080         struct enic *enic = container_of(napi, struct enic, napi);
1081         struct net_device *netdev = enic->netdev;
1082         unsigned int work_to_do = budget;
1083         unsigned int work_done;
1084
1085         /* Service RQ
1086          */
1087
1088         work_done = vnic_cq_service(&enic->cq[ENIC_CQ_RQ],
1089                 work_to_do, enic_rq_service, NULL);
1090
1091         if (work_done > 0) {
1092
1093                 /* Replenish RQ
1094                  */
1095
1096                 vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1097
1098                 /* Return intr event credits for this polling
1099                  * cycle.  An intr event is the completion of a
1100                  * RQ packet.
1101                  */
1102
1103                 vnic_intr_return_credits(&enic->intr[ENIC_MSIX_RQ],
1104                         work_done,
1105                         0 /* don't unmask intr */,
1106                         0 /* don't reset intr timer */);
1107         } else {
1108
1109                 /* If no work done, flush all LROs and exit polling
1110                  */
1111
1112                 if (netdev->features & NETIF_F_LRO)
1113                         lro_flush_all(&enic->lro_mgr);
1114
1115                 napi_complete(napi);
1116                 vnic_intr_unmask(&enic->intr[ENIC_MSIX_RQ]);
1117         }
1118
1119         return work_done;
1120 }
1121
1122 static void enic_notify_timer(unsigned long data)
1123 {
1124         struct enic *enic = (struct enic *)data;
1125
1126         enic_notify_check(enic);
1127
1128         mod_timer(&enic->notify_timer,
1129                 round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD));
1130 }
1131
1132 static void enic_free_intr(struct enic *enic)
1133 {
1134         struct net_device *netdev = enic->netdev;
1135         unsigned int i;
1136
1137         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1138         case VNIC_DEV_INTR_MODE_INTX:
1139                 free_irq(enic->pdev->irq, netdev);
1140                 break;
1141         case VNIC_DEV_INTR_MODE_MSI:
1142                 free_irq(enic->pdev->irq, enic);
1143                 break;
1144         case VNIC_DEV_INTR_MODE_MSIX:
1145                 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1146                         if (enic->msix[i].requested)
1147                                 free_irq(enic->msix_entry[i].vector,
1148                                         enic->msix[i].devid);
1149                 break;
1150         default:
1151                 break;
1152         }
1153 }
1154
1155 static int enic_request_intr(struct enic *enic)
1156 {
1157         struct net_device *netdev = enic->netdev;
1158         unsigned int i;
1159         int err = 0;
1160
1161         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1162
1163         case VNIC_DEV_INTR_MODE_INTX:
1164
1165                 err = request_irq(enic->pdev->irq, enic_isr_legacy,
1166                         IRQF_SHARED, netdev->name, netdev);
1167                 break;
1168
1169         case VNIC_DEV_INTR_MODE_MSI:
1170
1171                 err = request_irq(enic->pdev->irq, enic_isr_msi,
1172                         0, netdev->name, enic);
1173                 break;
1174
1175         case VNIC_DEV_INTR_MODE_MSIX:
1176
1177                 sprintf(enic->msix[ENIC_MSIX_RQ].devname,
1178                         "%.11s-rx-0", netdev->name);
1179                 enic->msix[ENIC_MSIX_RQ].isr = enic_isr_msix_rq;
1180                 enic->msix[ENIC_MSIX_RQ].devid = enic;
1181
1182                 sprintf(enic->msix[ENIC_MSIX_WQ].devname,
1183                         "%.11s-tx-0", netdev->name);
1184                 enic->msix[ENIC_MSIX_WQ].isr = enic_isr_msix_wq;
1185                 enic->msix[ENIC_MSIX_WQ].devid = enic;
1186
1187                 sprintf(enic->msix[ENIC_MSIX_ERR].devname,
1188                         "%.11s-err", netdev->name);
1189                 enic->msix[ENIC_MSIX_ERR].isr = enic_isr_msix_err;
1190                 enic->msix[ENIC_MSIX_ERR].devid = enic;
1191
1192                 sprintf(enic->msix[ENIC_MSIX_NOTIFY].devname,
1193                         "%.11s-notify", netdev->name);
1194                 enic->msix[ENIC_MSIX_NOTIFY].isr = enic_isr_msix_notify;
1195                 enic->msix[ENIC_MSIX_NOTIFY].devid = enic;
1196
1197                 for (i = 0; i < ARRAY_SIZE(enic->msix); i++) {
1198                         err = request_irq(enic->msix_entry[i].vector,
1199                                 enic->msix[i].isr, 0,
1200                                 enic->msix[i].devname,
1201                                 enic->msix[i].devid);
1202                         if (err) {
1203                                 enic_free_intr(enic);
1204                                 break;
1205                         }
1206                         enic->msix[i].requested = 1;
1207                 }
1208
1209                 break;
1210
1211         default:
1212                 break;
1213         }
1214
1215         return err;
1216 }
1217
1218 static int enic_notify_set(struct enic *enic)
1219 {
1220         int err;
1221
1222         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1223         case VNIC_DEV_INTR_MODE_INTX:
1224                 err = vnic_dev_notify_set(enic->vdev, ENIC_INTX_NOTIFY);
1225                 break;
1226         case VNIC_DEV_INTR_MODE_MSIX:
1227                 err = vnic_dev_notify_set(enic->vdev, ENIC_MSIX_NOTIFY);
1228                 break;
1229         default:
1230                 err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */);
1231                 break;
1232         }
1233
1234         return err;
1235 }
1236
1237 static void enic_notify_timer_start(struct enic *enic)
1238 {
1239         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1240         case VNIC_DEV_INTR_MODE_MSI:
1241                 mod_timer(&enic->notify_timer, jiffies);
1242                 break;
1243         default:
1244                 /* Using intr for notification for INTx/MSI-X */
1245                 break;
1246         };
1247 }
1248
1249 /* rtnl lock is held, process context */
1250 static int enic_open(struct net_device *netdev)
1251 {
1252         struct enic *enic = netdev_priv(netdev);
1253         unsigned int i;
1254         int err;
1255
1256         err = enic_request_intr(enic);
1257         if (err) {
1258                 printk(KERN_ERR PFX "%s: Unable to request irq.\n",
1259                         netdev->name);
1260                 return err;
1261         }
1262
1263         err = enic_notify_set(enic);
1264         if (err) {
1265                 printk(KERN_ERR PFX
1266                         "%s: Failed to alloc notify buffer, aborting.\n",
1267                         netdev->name);
1268                 goto err_out_free_intr;
1269         }
1270
1271         for (i = 0; i < enic->rq_count; i++) {
1272                 err = vnic_rq_fill(&enic->rq[i], enic_rq_alloc_buf);
1273                 if (err) {
1274                         printk(KERN_ERR PFX
1275                                 "%s: Unable to alloc receive buffers.\n",
1276                                 netdev->name);
1277                         goto err_out_notify_unset;
1278                 }
1279         }
1280
1281         for (i = 0; i < enic->wq_count; i++)
1282                 vnic_wq_enable(&enic->wq[i]);
1283         for (i = 0; i < enic->rq_count; i++)
1284                 vnic_rq_enable(&enic->rq[i]);
1285
1286         enic_add_station_addr(enic);
1287         enic_set_multicast_list(netdev);
1288
1289         netif_wake_queue(netdev);
1290         napi_enable(&enic->napi);
1291         vnic_dev_enable(enic->vdev);
1292
1293         for (i = 0; i < enic->intr_count; i++)
1294                 vnic_intr_unmask(&enic->intr[i]);
1295
1296         enic_notify_timer_start(enic);
1297
1298         return 0;
1299
1300 err_out_notify_unset:
1301         vnic_dev_notify_unset(enic->vdev);
1302 err_out_free_intr:
1303         enic_free_intr(enic);
1304
1305         return err;
1306 }
1307
1308 /* rtnl lock is held, process context */
1309 static int enic_stop(struct net_device *netdev)
1310 {
1311         struct enic *enic = netdev_priv(netdev);
1312         unsigned int i;
1313         int err;
1314
1315         del_timer_sync(&enic->notify_timer);
1316
1317         vnic_dev_disable(enic->vdev);
1318         napi_disable(&enic->napi);
1319         netif_stop_queue(netdev);
1320
1321         for (i = 0; i < enic->intr_count; i++)
1322                 vnic_intr_mask(&enic->intr[i]);
1323
1324         for (i = 0; i < enic->wq_count; i++) {
1325                 err = vnic_wq_disable(&enic->wq[i]);
1326                 if (err)
1327                         return err;
1328         }
1329         for (i = 0; i < enic->rq_count; i++) {
1330                 err = vnic_rq_disable(&enic->rq[i]);
1331                 if (err)
1332                         return err;
1333         }
1334
1335         vnic_dev_notify_unset(enic->vdev);
1336         enic_free_intr(enic);
1337
1338         (void)vnic_cq_service(&enic->cq[ENIC_CQ_RQ],
1339                 -1, enic_rq_service_drop, NULL);
1340         (void)vnic_cq_service(&enic->cq[ENIC_CQ_WQ],
1341                 -1, enic_wq_service, NULL);
1342
1343         for (i = 0; i < enic->wq_count; i++)
1344                 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
1345         for (i = 0; i < enic->rq_count; i++)
1346                 vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
1347         for (i = 0; i < enic->cq_count; i++)
1348                 vnic_cq_clean(&enic->cq[i]);
1349         for (i = 0; i < enic->intr_count; i++)
1350                 vnic_intr_clean(&enic->intr[i]);
1351
1352         return 0;
1353 }
1354
1355 static int enic_change_mtu(struct net_device *netdev, int new_mtu)
1356 {
1357         struct enic *enic = netdev_priv(netdev);
1358         int running = netif_running(netdev);
1359
1360         if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU)
1361                 return -EINVAL;
1362
1363         if (running)
1364                 enic_stop(netdev);
1365
1366         netdev->mtu = new_mtu;
1367
1368         if (netdev->mtu > enic->port_mtu)
1369                 printk(KERN_WARNING PFX
1370                         "%s: interface MTU (%d) set higher "
1371                         "than port MTU (%d)\n",
1372                         netdev->name, netdev->mtu, enic->port_mtu);
1373
1374         if (running)
1375                 enic_open(netdev);
1376
1377         return 0;
1378 }
1379
1380 #ifdef CONFIG_NET_POLL_CONTROLLER
1381 static void enic_poll_controller(struct net_device *netdev)
1382 {
1383         struct enic *enic = netdev_priv(netdev);
1384         struct vnic_dev *vdev = enic->vdev;
1385
1386         switch (vnic_dev_get_intr_mode(vdev)) {
1387         case VNIC_DEV_INTR_MODE_MSIX:
1388                 enic_isr_msix_rq(enic->pdev->irq, enic);
1389                 enic_isr_msix_wq(enic->pdev->irq, enic);
1390                 break;
1391         case VNIC_DEV_INTR_MODE_MSI:
1392                 enic_isr_msi(enic->pdev->irq, enic);
1393                 break;
1394         case VNIC_DEV_INTR_MODE_INTX:
1395                 enic_isr_legacy(enic->pdev->irq, netdev);
1396                 break;
1397         default:
1398                 break;
1399         }
1400 }
1401 #endif
1402
1403 static int enic_dev_wait(struct vnic_dev *vdev,
1404         int (*start)(struct vnic_dev *, int),
1405         int (*finished)(struct vnic_dev *, int *),
1406         int arg)
1407 {
1408         unsigned long time;
1409         int done;
1410         int err;
1411
1412         BUG_ON(in_interrupt());
1413
1414         err = start(vdev, arg);
1415         if (err)
1416                 return err;
1417
1418         /* Wait for func to complete...2 seconds max
1419          */
1420
1421         time = jiffies + (HZ * 2);
1422         do {
1423
1424                 err = finished(vdev, &done);
1425                 if (err)
1426                         return err;
1427
1428                 if (done)
1429                         return 0;
1430
1431                 schedule_timeout_uninterruptible(HZ / 10);
1432
1433         } while (time_after(time, jiffies));
1434
1435         return -ETIMEDOUT;
1436 }
1437
1438 static int enic_dev_open(struct enic *enic)
1439 {
1440         int err;
1441
1442         err = enic_dev_wait(enic->vdev, vnic_dev_open,
1443                 vnic_dev_open_done, 0);
1444         if (err)
1445                 printk(KERN_ERR PFX
1446                         "vNIC device open failed, err %d.\n", err);
1447
1448         return err;
1449 }
1450
1451 static int enic_dev_soft_reset(struct enic *enic)
1452 {
1453         int err;
1454
1455         err = enic_dev_wait(enic->vdev, vnic_dev_soft_reset,
1456                 vnic_dev_soft_reset_done, 0);
1457         if (err)
1458                 printk(KERN_ERR PFX
1459                         "vNIC soft reset failed, err %d.\n", err);
1460
1461         return err;
1462 }
1463
1464 static int enic_set_niccfg(struct enic *enic)
1465 {
1466         const u8 rss_default_cpu = 0;
1467         const u8 rss_hash_type = 0;
1468         const u8 rss_hash_bits = 0;
1469         const u8 rss_base_cpu = 0;
1470         const u8 rss_enable = 0;
1471         const u8 tso_ipid_split_en = 0;
1472         const u8 ig_vlan_strip_en = 1;
1473
1474         /* Enable VLAN tag stripping.  RSS not enabled (yet).
1475         */
1476
1477         return enic_set_nic_cfg(enic,
1478                 rss_default_cpu, rss_hash_type,
1479                 rss_hash_bits, rss_base_cpu,
1480                 rss_enable, tso_ipid_split_en,
1481                 ig_vlan_strip_en);
1482 }
1483
1484 static void enic_reset(struct work_struct *work)
1485 {
1486         struct enic *enic = container_of(work, struct enic, reset);
1487
1488         if (!netif_running(enic->netdev))
1489                 return;
1490
1491         rtnl_lock();
1492
1493         spin_lock(&enic->devcmd_lock);
1494         vnic_dev_hang_notify(enic->vdev);
1495         spin_unlock(&enic->devcmd_lock);
1496
1497         enic_stop(enic->netdev);
1498         enic_dev_soft_reset(enic);
1499         vnic_dev_init(enic->vdev, 0);
1500         enic_reset_mcaddrs(enic);
1501         enic_init_vnic_resources(enic);
1502         enic_set_niccfg(enic);
1503         enic_open(enic->netdev);
1504
1505         rtnl_unlock();
1506 }
1507
1508 static int enic_set_intr_mode(struct enic *enic)
1509 {
1510         unsigned int n = ARRAY_SIZE(enic->rq);
1511         unsigned int m = ARRAY_SIZE(enic->wq);
1512         unsigned int i;
1513
1514         /* Set interrupt mode (INTx, MSI, MSI-X) depending
1515          * system capabilities.
1516          *
1517          * Try MSI-X first
1518          *
1519          * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs
1520          * (the second to last INTR is used for WQ/RQ errors)
1521          * (the last INTR is used for notifications)
1522          */
1523
1524         BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2);
1525         for (i = 0; i < n + m + 2; i++)
1526                 enic->msix_entry[i].entry = i;
1527
1528         if (enic->config.intr_mode < 1 &&
1529             enic->rq_count >= n &&
1530             enic->wq_count >= m &&
1531             enic->cq_count >= n + m &&
1532             enic->intr_count >= n + m + 2 &&
1533             !pci_enable_msix(enic->pdev, enic->msix_entry, n + m + 2)) {
1534
1535                 enic->rq_count = n;
1536                 enic->wq_count = m;
1537                 enic->cq_count = n + m;
1538                 enic->intr_count = n + m + 2;
1539
1540                 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSIX);
1541
1542                 return 0;
1543         }
1544
1545         /* Next try MSI
1546          *
1547          * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR
1548          */
1549
1550         if (enic->config.intr_mode < 2 &&
1551             enic->rq_count >= 1 &&
1552             enic->wq_count >= 1 &&
1553             enic->cq_count >= 2 &&
1554             enic->intr_count >= 1 &&
1555             !pci_enable_msi(enic->pdev)) {
1556
1557                 enic->rq_count = 1;
1558                 enic->wq_count = 1;
1559                 enic->cq_count = 2;
1560                 enic->intr_count = 1;
1561
1562                 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI);
1563
1564                 return 0;
1565         }
1566
1567         /* Next try INTx
1568          *
1569          * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs
1570          * (the first INTR is used for WQ/RQ)
1571          * (the second INTR is used for WQ/RQ errors)
1572          * (the last INTR is used for notifications)
1573          */
1574
1575         if (enic->config.intr_mode < 3 &&
1576             enic->rq_count >= 1 &&
1577             enic->wq_count >= 1 &&
1578             enic->cq_count >= 2 &&
1579             enic->intr_count >= 3) {
1580
1581                 enic->rq_count = 1;
1582                 enic->wq_count = 1;
1583                 enic->cq_count = 2;
1584                 enic->intr_count = 3;
1585
1586                 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX);
1587
1588                 return 0;
1589         }
1590
1591         vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
1592
1593         return -EINVAL;
1594 }
1595
1596 static void enic_clear_intr_mode(struct enic *enic)
1597 {
1598         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1599         case VNIC_DEV_INTR_MODE_MSIX:
1600                 pci_disable_msix(enic->pdev);
1601                 break;
1602         case VNIC_DEV_INTR_MODE_MSI:
1603                 pci_disable_msi(enic->pdev);
1604                 break;
1605         default:
1606                 break;
1607         }
1608
1609         vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
1610 }
1611
1612 static void enic_iounmap(struct enic *enic)
1613 {
1614         if (enic->bar0.vaddr)
1615                 iounmap(enic->bar0.vaddr);
1616 }
1617
1618 static const struct net_device_ops enic_netdev_ops = {
1619         .ndo_open               = enic_open,
1620         .ndo_stop               = enic_stop,
1621         .ndo_start_xmit         = enic_hard_start_xmit,
1622         .ndo_get_stats          = enic_get_stats,
1623         .ndo_validate_addr      = eth_validate_addr,
1624         .ndo_set_mac_address    = eth_mac_addr,
1625         .ndo_set_multicast_list = enic_set_multicast_list,
1626         .ndo_change_mtu         = enic_change_mtu,
1627         .ndo_vlan_rx_register   = enic_vlan_rx_register,
1628         .ndo_vlan_rx_add_vid    = enic_vlan_rx_add_vid,
1629         .ndo_vlan_rx_kill_vid   = enic_vlan_rx_kill_vid,
1630         .ndo_tx_timeout         = enic_tx_timeout,
1631 #ifdef CONFIG_NET_POLL_CONTROLLER
1632         .ndo_poll_controller    = enic_poll_controller,
1633 #endif
1634 };
1635
1636 static int __devinit enic_probe(struct pci_dev *pdev,
1637         const struct pci_device_id *ent)
1638 {
1639         struct net_device *netdev;
1640         struct enic *enic;
1641         int using_dac = 0;
1642         unsigned int i;
1643         int err;
1644
1645         /* Allocate net device structure and initialize.  Private
1646          * instance data is initialized to zero.
1647          */
1648
1649         netdev = alloc_etherdev(sizeof(struct enic));
1650         if (!netdev) {
1651                 printk(KERN_ERR PFX "Etherdev alloc failed, aborting.\n");
1652                 return -ENOMEM;
1653         }
1654
1655         pci_set_drvdata(pdev, netdev);
1656
1657         SET_NETDEV_DEV(netdev, &pdev->dev);
1658
1659         enic = netdev_priv(netdev);
1660         enic->netdev = netdev;
1661         enic->pdev = pdev;
1662
1663         /* Setup PCI resources
1664          */
1665
1666         err = pci_enable_device(pdev);
1667         if (err) {
1668                 printk(KERN_ERR PFX
1669                         "Cannot enable PCI device, aborting.\n");
1670                 goto err_out_free_netdev;
1671         }
1672
1673         err = pci_request_regions(pdev, DRV_NAME);
1674         if (err) {
1675                 printk(KERN_ERR PFX
1676                         "Cannot request PCI regions, aborting.\n");
1677                 goto err_out_disable_device;
1678         }
1679
1680         pci_set_master(pdev);
1681
1682         /* Query PCI controller on system for DMA addressing
1683          * limitation for the device.  Try 40-bit first, and
1684          * fail to 32-bit.
1685          */
1686
1687         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(40));
1688         if (err) {
1689                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
1690                 if (err) {
1691                         printk(KERN_ERR PFX
1692                                 "No usable DMA configuration, aborting.\n");
1693                         goto err_out_release_regions;
1694                 }
1695                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
1696                 if (err) {
1697                         printk(KERN_ERR PFX
1698                                 "Unable to obtain 32-bit DMA "
1699                                 "for consistent allocations, aborting.\n");
1700                         goto err_out_release_regions;
1701                 }
1702         } else {
1703                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(40));
1704                 if (err) {
1705                         printk(KERN_ERR PFX
1706                                 "Unable to obtain 40-bit DMA "
1707                                 "for consistent allocations, aborting.\n");
1708                         goto err_out_release_regions;
1709                 }
1710                 using_dac = 1;
1711         }
1712
1713         /* Map vNIC resources from BAR0
1714          */
1715
1716         if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
1717                 printk(KERN_ERR PFX
1718                         "BAR0 not memory-map'able, aborting.\n");
1719                 err = -ENODEV;
1720                 goto err_out_release_regions;
1721         }
1722
1723         enic->bar0.vaddr = pci_iomap(pdev, 0, enic->bar0.len);
1724         enic->bar0.bus_addr = pci_resource_start(pdev, 0);
1725         enic->bar0.len = pci_resource_len(pdev, 0);
1726
1727         if (!enic->bar0.vaddr) {
1728                 printk(KERN_ERR PFX
1729                         "Cannot memory-map BAR0 res hdr, aborting.\n");
1730                 err = -ENODEV;
1731                 goto err_out_release_regions;
1732         }
1733
1734         /* Register vNIC device
1735          */
1736
1737         enic->vdev = vnic_dev_register(NULL, enic, pdev, &enic->bar0);
1738         if (!enic->vdev) {
1739                 printk(KERN_ERR PFX
1740                         "vNIC registration failed, aborting.\n");
1741                 err = -ENODEV;
1742                 goto err_out_iounmap;
1743         }
1744
1745         /* Issue device open to get device in known state
1746          */
1747
1748         err = enic_dev_open(enic);
1749         if (err) {
1750                 printk(KERN_ERR PFX
1751                         "vNIC dev open failed, aborting.\n");
1752                 goto err_out_vnic_unregister;
1753         }
1754
1755         /* Issue device init to initialize the vnic-to-switch link.
1756          * We'll start with carrier off and wait for link UP
1757          * notification later to turn on carrier.  We don't need
1758          * to wait here for the vnic-to-switch link initialization
1759          * to complete; link UP notification is the indication that
1760          * the process is complete.
1761          */
1762
1763         netif_carrier_off(netdev);
1764
1765         err = vnic_dev_init(enic->vdev, 0);
1766         if (err) {
1767                 printk(KERN_ERR PFX
1768                         "vNIC dev init failed, aborting.\n");
1769                 goto err_out_dev_close;
1770         }
1771
1772         /* Get vNIC configuration
1773          */
1774
1775         err = enic_get_vnic_config(enic);
1776         if (err) {
1777                 printk(KERN_ERR PFX
1778                         "Get vNIC configuration failed, aborting.\n");
1779                 goto err_out_dev_close;
1780         }
1781
1782         /* Get available resource counts
1783          */
1784
1785         enic_get_res_counts(enic);
1786
1787         /* Set interrupt mode based on resource counts and system
1788          * capabilities
1789          */
1790
1791         err = enic_set_intr_mode(enic);
1792         if (err) {
1793                 printk(KERN_ERR PFX
1794                         "Failed to set intr mode, aborting.\n");
1795                 goto err_out_dev_close;
1796         }
1797
1798         /* Allocate and configure vNIC resources
1799          */
1800
1801         err = enic_alloc_vnic_resources(enic);
1802         if (err) {
1803                 printk(KERN_ERR PFX
1804                         "Failed to alloc vNIC resources, aborting.\n");
1805                 goto err_out_free_vnic_resources;
1806         }
1807
1808         enic_init_vnic_resources(enic);
1809
1810         err = enic_set_niccfg(enic);
1811         if (err) {
1812                 printk(KERN_ERR PFX
1813                         "Failed to config nic, aborting.\n");
1814                 goto err_out_free_vnic_resources;
1815         }
1816
1817         /* Setup notification timer, HW reset task, and locks
1818          */
1819
1820         init_timer(&enic->notify_timer);
1821         enic->notify_timer.function = enic_notify_timer;
1822         enic->notify_timer.data = (unsigned long)enic;
1823
1824         INIT_WORK(&enic->reset, enic_reset);
1825
1826         for (i = 0; i < enic->wq_count; i++)
1827                 spin_lock_init(&enic->wq_lock[i]);
1828
1829         spin_lock_init(&enic->devcmd_lock);
1830
1831         /* Register net device
1832          */
1833
1834         enic->port_mtu = enic->config.mtu;
1835         (void)enic_change_mtu(netdev, enic->port_mtu);
1836
1837         err = enic_set_mac_addr(netdev, enic->mac_addr);
1838         if (err) {
1839                 printk(KERN_ERR PFX
1840                         "Invalid MAC address, aborting.\n");
1841                 goto err_out_free_vnic_resources;
1842         }
1843
1844         netdev->netdev_ops = &enic_netdev_ops;
1845         netdev->watchdog_timeo = 2 * HZ;
1846         netdev->ethtool_ops = &enic_ethtool_ops;
1847
1848         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1849         default:
1850                 netif_napi_add(netdev, &enic->napi, enic_poll, 64);
1851                 break;
1852         case VNIC_DEV_INTR_MODE_MSIX:
1853                 netif_napi_add(netdev, &enic->napi, enic_poll_msix, 64);
1854                 break;
1855         }
1856
1857         netdev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
1858         if (ENIC_SETTING(enic, TXCSUM))
1859                 netdev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
1860         if (ENIC_SETTING(enic, TSO))
1861                 netdev->features |= NETIF_F_TSO |
1862                         NETIF_F_TSO6 | NETIF_F_TSO_ECN;
1863         if (ENIC_SETTING(enic, LRO))
1864                 netdev->features |= NETIF_F_LRO;
1865         if (using_dac)
1866                 netdev->features |= NETIF_F_HIGHDMA;
1867
1868         enic->csum_rx_enabled = ENIC_SETTING(enic, RXCSUM);
1869
1870         enic->lro_mgr.max_aggr = ENIC_LRO_MAX_AGGR;
1871         enic->lro_mgr.max_desc = ENIC_LRO_MAX_DESC;
1872         enic->lro_mgr.lro_arr = enic->lro_desc;
1873         enic->lro_mgr.get_skb_header = enic_get_skb_header;
1874         enic->lro_mgr.features  = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
1875         enic->lro_mgr.dev = netdev;
1876         enic->lro_mgr.ip_summed = CHECKSUM_COMPLETE;
1877         enic->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1878
1879         err = register_netdev(netdev);
1880         if (err) {
1881                 printk(KERN_ERR PFX
1882                         "Cannot register net device, aborting.\n");
1883                 goto err_out_free_vnic_resources;
1884         }
1885
1886         return 0;
1887
1888 err_out_free_vnic_resources:
1889         enic_free_vnic_resources(enic);
1890 err_out_dev_close:
1891         vnic_dev_close(enic->vdev);
1892 err_out_vnic_unregister:
1893         enic_clear_intr_mode(enic);
1894         vnic_dev_unregister(enic->vdev);
1895 err_out_iounmap:
1896         enic_iounmap(enic);
1897 err_out_release_regions:
1898         pci_release_regions(pdev);
1899 err_out_disable_device:
1900         pci_disable_device(pdev);
1901 err_out_free_netdev:
1902         pci_set_drvdata(pdev, NULL);
1903         free_netdev(netdev);
1904
1905         return err;
1906 }
1907
1908 static void __devexit enic_remove(struct pci_dev *pdev)
1909 {
1910         struct net_device *netdev = pci_get_drvdata(pdev);
1911
1912         if (netdev) {
1913                 struct enic *enic = netdev_priv(netdev);
1914
1915                 flush_scheduled_work();
1916                 unregister_netdev(netdev);
1917                 enic_free_vnic_resources(enic);
1918                 vnic_dev_close(enic->vdev);
1919                 enic_clear_intr_mode(enic);
1920                 vnic_dev_unregister(enic->vdev);
1921                 enic_iounmap(enic);
1922                 pci_release_regions(pdev);
1923                 pci_disable_device(pdev);
1924                 pci_set_drvdata(pdev, NULL);
1925                 free_netdev(netdev);
1926         }
1927 }
1928
1929 static struct pci_driver enic_driver = {
1930         .name = DRV_NAME,
1931         .id_table = enic_id_table,
1932         .probe = enic_probe,
1933         .remove = __devexit_p(enic_remove),
1934 };
1935
1936 static int __init enic_init_module(void)
1937 {
1938         printk(KERN_INFO PFX "%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
1939
1940         return pci_register_driver(&enic_driver);
1941 }
1942
1943 static void __exit enic_cleanup_module(void)
1944 {
1945         pci_unregister_driver(&enic_driver);
1946 }
1947
1948 module_init(enic_init_module);
1949 module_exit(enic_cleanup_module);