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 int enic_hard_start_xmit(struct sk_buff *skb, struct net_device *netdev)
 626 {
 627         struct enic *enic = netdev_priv(netdev);
 628         struct vnic_wq *wq = &enic->wq[0];
 629         unsigned long flags;
 630
 631         if (skb->len <= 0) {
 632                 dev_kfree_skb(skb);
 633                 return NETDEV_TX_OK;
 634         }
 635
 636         /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs,
 637          * which is very likely.  In the off chance it's going to take
 638          * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb.
 639          */
 640
 641         if (skb_shinfo(skb)->gso_size == 0 &&
 642             skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC &&
 643             skb_linearize(skb)) {
 644                 dev_kfree_skb(skb);
 645                 return NETDEV_TX_OK;
 646         }
 647
 648         spin_lock_irqsave(&enic->wq_lock[0], flags);
 649
 650         if (vnic_wq_desc_avail(wq) < skb_shinfo(skb)->nr_frags + 1) {
 651                 netif_stop_queue(netdev);
 652                 /* This is a hard error, log it */
 653                 printk(KERN_ERR PFX "%s: BUG! Tx ring full when "
 654                         "queue awake!\n", netdev->name);
 655                 spin_unlock_irqrestore(&enic->wq_lock[0], flags);
 656                 return NETDEV_TX_BUSY;
 657         }
 658
 659         enic_queue_wq_skb(enic, wq, skb);
 660
 661         if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + 1)
 662                 netif_stop_queue(netdev);
 663
 664         netdev->trans_start = jiffies;
 665
 666         spin_unlock_irqrestore(&enic->wq_lock[0], flags);
 667
 668         return NETDEV_TX_OK;
 669 }
 670
 671 /* dev_base_lock rwlock held, nominally process context */
 672 static struct net_device_stats *enic_get_stats(struct net_device *netdev)
 673 {
 674         struct enic *enic = netdev_priv(netdev);
 675         struct net_device_stats *net_stats = &netdev->stats;
 676         struct vnic_stats *stats;
 677
 678         spin_lock(&enic->devcmd_lock);
 679         vnic_dev_stats_dump(enic->vdev, &stats);
 680         spin_unlock(&enic->devcmd_lock);
 681
 682         net_stats->tx_packets = stats->tx.tx_frames_ok;
 683         net_stats->tx_bytes = stats->tx.tx_bytes_ok;
 684         net_stats->tx_errors = stats->tx.tx_errors;
 685         net_stats->tx_dropped = stats->tx.tx_drops;
 686
 687         net_stats->rx_packets = stats->rx.rx_frames_ok;
 688         net_stats->rx_bytes = stats->rx.rx_bytes_ok;
 689         net_stats->rx_errors = stats->rx.rx_errors;
 690         net_stats->multicast = stats->rx.rx_multicast_frames_ok;
 691         net_stats->rx_crc_errors = enic->rq_bad_fcs;
 692         net_stats->rx_dropped = stats->rx.rx_no_bufs;
 693
 694         return net_stats;
 695 }
 696
 697 static void enic_reset_mcaddrs(struct enic *enic)
 698 {
 699         enic->mc_count = 0;
 700 }
 701
 702 static int enic_set_mac_addr(struct net_device *netdev, char *addr)
 703 {
 704         if (!is_valid_ether_addr(addr))
 705                 return -EADDRNOTAVAIL;
 706
 707         memcpy(netdev->dev_addr, addr, netdev->addr_len);
 708
 709         return 0;
 710 }
 711
 712 /* netif_tx_lock held, BHs disabled */
 713 static void enic_set_multicast_list(struct net_device *netdev)
 714 {
 715         struct enic *enic = netdev_priv(netdev);
 716         struct dev_mc_list *list = netdev->mc_list;
 717         int directed = 1;
 718         int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0;
 719         int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0;
 720         int promisc = (netdev->flags & IFF_PROMISC) ? 1 : 0;
 721         int allmulti = (netdev->flags & IFF_ALLMULTI) ||
 722             (netdev->mc_count > ENIC_MULTICAST_PERFECT_FILTERS);
 723         u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN];
 724         unsigned int mc_count = netdev->mc_count;
 725         unsigned int i, j;
 726
 727         if (mc_count > ENIC_MULTICAST_PERFECT_FILTERS)
 728                 mc_count = ENIC_MULTICAST_PERFECT_FILTERS;
 729
 730         spin_lock(&enic->devcmd_lock);
 731
 732         vnic_dev_packet_filter(enic->vdev, directed,
 733                 multicast, broadcast, promisc, allmulti);
 734
 735         /* Is there an easier way?  Trying to minimize to
 736          * calls to add/del multicast addrs.  We keep the
 737          * addrs from the last call in enic->mc_addr and
 738          * look for changes to add/del.
 739          */
 740
 741         for (i = 0; list && i < mc_count; i++) {
 742                 memcpy(mc_addr[i], list->dmi_addr, ETH_ALEN);
 743                 list = list->next;
 744         }
 745
 746         for (i = 0; i < enic->mc_count; i++) {
 747                 for (j = 0; j < mc_count; j++)
 748                         if (compare_ether_addr(enic->mc_addr[i],
 749                                 mc_addr[j]) == 0)
 750                                 break;
 751                 if (j == mc_count)
 752                         enic_del_multicast_addr(enic, enic->mc_addr[i]);
 753         }
 754
 755         for (i = 0; i < mc_count; i++) {
 756                 for (j = 0; j < enic->mc_count; j++)
 757                         if (compare_ether_addr(mc_addr[i],
 758                                 enic->mc_addr[j]) == 0)
 759                                 break;
 760                 if (j == enic->mc_count)
 761                         enic_add_multicast_addr(enic, mc_addr[i]);
 762         }
 763
 764         /* Save the list to compare against next time
 765          */
 766
 767         for (i = 0; i < mc_count; i++)
 768                 memcpy(enic->mc_addr[i], mc_addr[i], ETH_ALEN);
 769
 770         enic->mc_count = mc_count;
 771
 772         spin_unlock(&enic->devcmd_lock);
 773 }
 774
 775 /* rtnl lock is held */
 776 static void enic_vlan_rx_register(struct net_device *netdev,
 777         struct vlan_group *vlan_group)
 778 {
 779         struct enic *enic = netdev_priv(netdev);
 780         enic->vlan_group = vlan_group;
 781 }
 782
 783 /* rtnl lock is held */
 784 static void enic_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
 785 {
 786         struct enic *enic = netdev_priv(netdev);
 787
 788         spin_lock(&enic->devcmd_lock);
 789         enic_add_vlan(enic, vid);
 790         spin_unlock(&enic->devcmd_lock);
 791 }
 792
 793 /* rtnl lock is held */
 794 static void enic_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
 795 {
 796         struct enic *enic = netdev_priv(netdev);
 797
 798         spin_lock(&enic->devcmd_lock);
 799         enic_del_vlan(enic, vid);
 800         spin_unlock(&enic->devcmd_lock);
 801 }
 802
 803 /* netif_tx_lock held, BHs disabled */
 804 static void enic_tx_timeout(struct net_device *netdev)
 805 {
 806         struct enic *enic = netdev_priv(netdev);
 807         schedule_work(&enic->reset);
 808 }
 809
 810 static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
 811 {
 812         struct enic *enic = vnic_dev_priv(rq->vdev);
 813
 814         if (!buf->os_buf)
 815                 return;
 816
 817         pci_unmap_single(enic->pdev, buf->dma_addr,
 818                 buf->len, PCI_DMA_FROMDEVICE);
 819         dev_kfree_skb_any(buf->os_buf);
 820 }
 821
 822 static inline struct sk_buff *enic_rq_alloc_skb(unsigned int size)
 823 {
 824         struct sk_buff *skb;
 825
 826         skb = dev_alloc_skb(size + NET_IP_ALIGN);
 827
 828         if (skb)
 829                 skb_reserve(skb, NET_IP_ALIGN);
 830
 831         return skb;
 832 }
 833
 834 static int enic_rq_alloc_buf(struct vnic_rq *rq)
 835 {
 836         struct enic *enic = vnic_dev_priv(rq->vdev);
 837         struct sk_buff *skb;
 838         unsigned int len = enic->netdev->mtu + ETH_HLEN;
 839         unsigned int os_buf_index = 0;
 840         dma_addr_t dma_addr;
 841
 842         skb = enic_rq_alloc_skb(len);
 843         if (!skb)
 844                 return -ENOMEM;
 845
 846         dma_addr = pci_map_single(enic->pdev, skb->data,
 847                 len, PCI_DMA_FROMDEVICE);
 848
 849         enic_queue_rq_desc(rq, skb, os_buf_index,
 850                 dma_addr, len);
 851
 852         return 0;
 853 }
 854
 855 static int enic_get_skb_header(struct sk_buff *skb, void **iphdr,
 856         void **tcph, u64 *hdr_flags, void *priv)
 857 {
 858         struct cq_enet_rq_desc *cq_desc = priv;
 859         unsigned int ip_len;
 860         struct iphdr *iph;
 861
 862         u8 type, color, eop, sop, ingress_port, vlan_stripped;
 863         u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
 864         u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
 865         u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
 866         u8 packet_error;
 867         u16 q_number, completed_index, bytes_written, vlan, checksum;
 868         u32 rss_hash;
 869
 870         cq_enet_rq_desc_dec(cq_desc,
 871                 &type, &color, &q_number, &completed_index,
 872                 &ingress_port, &fcoe, &eop, &sop, &rss_type,
 873                 &csum_not_calc, &rss_hash, &bytes_written,
 874                 &packet_error, &vlan_stripped, &vlan, &checksum,
 875                 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
 876                 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
 877                 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
 878                 &fcs_ok);
 879
 880         if (!(ipv4 && tcp && !ipv4_fragment))
 881                 return -1;
 882
 883         skb_reset_network_header(skb);
 884         iph = ip_hdr(skb);
 885
 886         ip_len = ip_hdrlen(skb);
 887         skb_set_transport_header(skb, ip_len);
 888
 889         /* check if ip header and tcp header are complete */
 890         if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb))
 891                 return -1;
 892
 893         *hdr_flags = LRO_IPV4 | LRO_TCP;
 894         *tcph = tcp_hdr(skb);
 895         *iphdr = iph;
 896
 897         return 0;
 898 }
 899
 900 static void enic_rq_indicate_buf(struct vnic_rq *rq,
 901         struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
 902         int skipped, void *opaque)
 903 {
 904         struct enic *enic = vnic_dev_priv(rq->vdev);
 905         struct net_device *netdev = enic->netdev;
 906         struct sk_buff *skb;
 907
 908         u8 type, color, eop, sop, ingress_port, vlan_stripped;
 909         u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
 910         u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
 911         u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
 912         u8 packet_error;
 913         u16 q_number, completed_index, bytes_written, vlan, checksum;
 914         u32 rss_hash;
 915
 916         if (skipped)
 917                 return;
 918
 919         skb = buf->os_buf;
 920         prefetch(skb->data - NET_IP_ALIGN);
 921         pci_unmap_single(enic->pdev, buf->dma_addr,
 922                 buf->len, PCI_DMA_FROMDEVICE);
 923
 924         cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
 925                 &type, &color, &q_number, &completed_index,
 926                 &ingress_port, &fcoe, &eop, &sop, &rss_type,
 927                 &csum_not_calc, &rss_hash, &bytes_written,
 928                 &packet_error, &vlan_stripped, &vlan, &checksum,
 929                 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
 930                 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
 931                 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
 932                 &fcs_ok);
 933
 934         if (packet_error) {
 935
 936                 if (bytes_written > 0 && !fcs_ok)
 937                         enic->rq_bad_fcs++;
 938
 939                 dev_kfree_skb_any(skb);
 940
 941                 return;
 942         }
 943
 944         if (eop && bytes_written > 0) {
 945
 946                 /* Good receive
 947                  */
 948
 949                 skb_put(skb, bytes_written);
 950                 skb->protocol = eth_type_trans(skb, netdev);
 951
 952                 if (enic->csum_rx_enabled && !csum_not_calc) {
 953                         skb->csum = htons(checksum);
 954                         skb->ip_summed = CHECKSUM_COMPLETE;
 955                 }
 956
 957                 skb->dev = netdev;
 958
 959                 if (enic->vlan_group && vlan_stripped) {
 960
 961                         if ((netdev->features & NETIF_F_LRO) && ipv4)
 962                                 lro_vlan_hwaccel_receive_skb(&enic->lro_mgr,
 963                                         skb, enic->vlan_group,
 964                                         vlan, cq_desc);
 965                         else
 966                                 vlan_hwaccel_receive_skb(skb,
 967                                         enic->vlan_group, vlan);
 968
 969                 } else {
 970
 971                         if ((netdev->features & NETIF_F_LRO) && ipv4)
 972                                 lro_receive_skb(&enic->lro_mgr, skb, cq_desc);
 973                         else
 974                                 netif_receive_skb(skb);
 975
 976                 }
 977
 978         } else {
 979
 980                 /* Buffer overflow
 981                  */
 982
 983                 dev_kfree_skb_any(skb);
 984         }
 985 }
 986
 987 static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
 988         u8 type, u16 q_number, u16 completed_index, void *opaque)
 989 {
 990         struct enic *enic = vnic_dev_priv(vdev);
 991
 992         vnic_rq_service(&enic->rq[q_number], cq_desc,
 993                 completed_index, VNIC_RQ_RETURN_DESC,
 994                 enic_rq_indicate_buf, opaque);
 995
 996         return 0;
 997 }
 998
 999 static void enic_rq_drop_buf(struct vnic_rq *rq,
1000         struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
1001         int skipped, void *opaque)
1002 {
1003         struct enic *enic = vnic_dev_priv(rq->vdev);
1004         struct sk_buff *skb = buf->os_buf;
1005
1006         if (skipped)
1007                 return;
1008
1009         pci_unmap_single(enic->pdev, buf->dma_addr,
1010                 buf->len, PCI_DMA_FROMDEVICE);
1011
1012         dev_kfree_skb_any(skb);
1013 }
1014
1015 static int enic_rq_service_drop(struct vnic_dev *vdev, struct cq_desc *cq_desc,
1016         u8 type, u16 q_number, u16 completed_index, void *opaque)
1017 {
1018         struct enic *enic = vnic_dev_priv(vdev);
1019
1020         vnic_rq_service(&enic->rq[q_number], cq_desc,
1021                 completed_index, VNIC_RQ_RETURN_DESC,
1022                 enic_rq_drop_buf, opaque);
1023
1024         return 0;
1025 }
1026
1027 static int enic_poll(struct napi_struct *napi, int budget)
1028 {
1029         struct enic *enic = container_of(napi, struct enic, napi);
1030         struct net_device *netdev = enic->netdev;
1031         unsigned int rq_work_to_do = budget;
1032         unsigned int wq_work_to_do = -1; /* no limit */
1033         unsigned int  work_done, rq_work_done, wq_work_done;
1034
1035         /* Service RQ (first) and WQ
1036          */
1037
1038         rq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_RQ],
1039                 rq_work_to_do, enic_rq_service, NULL);
1040
1041         wq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_WQ],
1042                 wq_work_to_do, enic_wq_service, NULL);
1043
1044         /* Accumulate intr event credits for this polling
1045          * cycle.  An intr event is the completion of a
1046          * a WQ or RQ packet.
1047          */
1048
1049         work_done = rq_work_done + wq_work_done;
1050
1051         if (work_done > 0)
1052                 vnic_intr_return_credits(&enic->intr[ENIC_INTX_WQ_RQ],
1053                         work_done,
1054                         0 /* don't unmask intr */,
1055                         0 /* don't reset intr timer */);
1056
1057         if (rq_work_done > 0) {
1058
1059                 /* Replenish RQ
1060                  */
1061
1062                 vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1063
1064         } else {
1065
1066                 /* If no work done, flush all LROs and exit polling
1067                  */
1068
1069                 if (netdev->features & NETIF_F_LRO)
1070                         lro_flush_all(&enic->lro_mgr);
1071
1072                 napi_complete(napi);
1073                 vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]);
1074         }
1075
1076         return rq_work_done;
1077 }
1078
1079 static int enic_poll_msix(struct napi_struct *napi, int budget)
1080 {
1081         struct enic *enic = container_of(napi, struct enic, napi);
1082         struct net_device *netdev = enic->netdev;
1083         unsigned int work_to_do = budget;
1084         unsigned int work_done;
1085
1086         /* Service RQ
1087          */
1088
1089         work_done = vnic_cq_service(&enic->cq[ENIC_CQ_RQ],
1090                 work_to_do, enic_rq_service, NULL);
1091
1092         if (work_done > 0) {
1093
1094                 /* Replenish RQ
1095                  */
1096
1097                 vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1098
1099                 /* Return intr event credits for this polling
1100                  * cycle.  An intr event is the completion of a
1101                  * RQ packet.
1102                  */
1103
1104                 vnic_intr_return_credits(&enic->intr[ENIC_MSIX_RQ],
1105                         work_done,
1106                         0 /* don't unmask intr */,
1107                         0 /* don't reset intr timer */);
1108         } else {
1109
1110                 /* If no work done, flush all LROs and exit polling
1111                  */
1112
1113                 if (netdev->features & NETIF_F_LRO)
1114                         lro_flush_all(&enic->lro_mgr);
1115
1116                 napi_complete(napi);
1117                 vnic_intr_unmask(&enic->intr[ENIC_MSIX_RQ]);
1118         }
1119
1120         return work_done;
1121 }
1122
1123 static void enic_notify_timer(unsigned long data)
1124 {
1125         struct enic *enic = (struct enic *)data;
1126
1127         enic_notify_check(enic);
1128
1129         mod_timer(&enic->notify_timer,
1130                 round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD));
1131 }
1132
1133 static void enic_free_intr(struct enic *enic)
1134 {
1135         struct net_device *netdev = enic->netdev;
1136         unsigned int i;
1137
1138         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1139         case VNIC_DEV_INTR_MODE_INTX:
1140                 free_irq(enic->pdev->irq, netdev);
1141                 break;
1142         case VNIC_DEV_INTR_MODE_MSI:
1143                 free_irq(enic->pdev->irq, enic);
1144                 break;
1145         case VNIC_DEV_INTR_MODE_MSIX:
1146                 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1147                         if (enic->msix[i].requested)
1148                                 free_irq(enic->msix_entry[i].vector,
1149                                         enic->msix[i].devid);
1150                 break;
1151         default:
1152                 break;
1153         }
1154 }
1155
1156 static int enic_request_intr(struct enic *enic)
1157 {
1158         struct net_device *netdev = enic->netdev;
1159         unsigned int i;
1160         int err = 0;
1161
1162         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1163
1164         case VNIC_DEV_INTR_MODE_INTX:
1165
1166                 err = request_irq(enic->pdev->irq, enic_isr_legacy,
1167                         IRQF_SHARED, netdev->name, netdev);
1168                 break;
1169
1170         case VNIC_DEV_INTR_MODE_MSI:
1171
1172                 err = request_irq(enic->pdev->irq, enic_isr_msi,
1173                         0, netdev->name, enic);
1174                 break;
1175
1176         case VNIC_DEV_INTR_MODE_MSIX:
1177
1178                 sprintf(enic->msix[ENIC_MSIX_RQ].devname,
1179                         "%.11s-rx-0", netdev->name);
1180                 enic->msix[ENIC_MSIX_RQ].isr = enic_isr_msix_rq;
1181                 enic->msix[ENIC_MSIX_RQ].devid = enic;
1182
1183                 sprintf(enic->msix[ENIC_MSIX_WQ].devname,
1184                         "%.11s-tx-0", netdev->name);
1185                 enic->msix[ENIC_MSIX_WQ].isr = enic_isr_msix_wq;
1186                 enic->msix[ENIC_MSIX_WQ].devid = enic;
1187
1188                 sprintf(enic->msix[ENIC_MSIX_ERR].devname,
1189                         "%.11s-err", netdev->name);
1190                 enic->msix[ENIC_MSIX_ERR].isr = enic_isr_msix_err;
1191                 enic->msix[ENIC_MSIX_ERR].devid = enic;
1192
1193                 sprintf(enic->msix[ENIC_MSIX_NOTIFY].devname,
1194                         "%.11s-notify", netdev->name);
1195                 enic->msix[ENIC_MSIX_NOTIFY].isr = enic_isr_msix_notify;
1196                 enic->msix[ENIC_MSIX_NOTIFY].devid = enic;
1197
1198                 for (i = 0; i < ARRAY_SIZE(enic->msix); i++) {
1199                         err = request_irq(enic->msix_entry[i].vector,
1200                                 enic->msix[i].isr, 0,
1201                                 enic->msix[i].devname,
1202                                 enic->msix[i].devid);
1203                         if (err) {
1204                                 enic_free_intr(enic);
1205                                 break;
1206                         }
1207                         enic->msix[i].requested = 1;
1208                 }
1209
1210                 break;
1211
1212         default:
1213                 break;
1214         }
1215
1216         return err;
1217 }
1218
1219 static int enic_notify_set(struct enic *enic)
1220 {
1221         int err;
1222
1223         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1224         case VNIC_DEV_INTR_MODE_INTX:
1225                 err = vnic_dev_notify_set(enic->vdev, ENIC_INTX_NOTIFY);
1226                 break;
1227         case VNIC_DEV_INTR_MODE_MSIX:
1228                 err = vnic_dev_notify_set(enic->vdev, ENIC_MSIX_NOTIFY);
1229                 break;
1230         default:
1231                 err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */);
1232                 break;
1233         }
1234
1235         return err;
1236 }
1237
1238 static void enic_notify_timer_start(struct enic *enic)
1239 {
1240         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1241         case VNIC_DEV_INTR_MODE_MSI:
1242                 mod_timer(&enic->notify_timer, jiffies);
1243                 break;
1244         default:
1245                 /* Using intr for notification for INTx/MSI-X */
1246                 break;
1247         };
1248 }
1249
1250 /* rtnl lock is held, process context */
1251 static int enic_open(struct net_device *netdev)
1252 {
1253         struct enic *enic = netdev_priv(netdev);
1254         unsigned int i;
1255         int err;
1256
1257         err = enic_request_intr(enic);
1258         if (err) {
1259                 printk(KERN_ERR PFX "%s: Unable to request irq.\n",
1260                         netdev->name);
1261                 return err;
1262         }
1263
1264         err = enic_notify_set(enic);
1265         if (err) {
1266                 printk(KERN_ERR PFX
1267                         "%s: Failed to alloc notify buffer, aborting.\n",
1268                         netdev->name);
1269                 goto err_out_free_intr;
1270         }
1271
1272         for (i = 0; i < enic->rq_count; i++) {
1273                 err = vnic_rq_fill(&enic->rq[i], enic_rq_alloc_buf);
1274                 if (err) {
1275                         printk(KERN_ERR PFX
1276                                 "%s: Unable to alloc receive buffers.\n",
1277                                 netdev->name);
1278                         goto err_out_notify_unset;
1279                 }
1280         }
1281
1282         for (i = 0; i < enic->wq_count; i++)
1283                 vnic_wq_enable(&enic->wq[i]);
1284         for (i = 0; i < enic->rq_count; i++)
1285                 vnic_rq_enable(&enic->rq[i]);
1286
1287         enic_add_station_addr(enic);
1288         enic_set_multicast_list(netdev);
1289
1290         netif_wake_queue(netdev);
1291         napi_enable(&enic->napi);
1292         vnic_dev_enable(enic->vdev);
1293
1294         for (i = 0; i < enic->intr_count; i++)
1295                 vnic_intr_unmask(&enic->intr[i]);
1296
1297         enic_notify_timer_start(enic);
1298
1299         return 0;
1300
1301 err_out_notify_unset:
1302         vnic_dev_notify_unset(enic->vdev);
1303 err_out_free_intr:
1304         enic_free_intr(enic);
1305
1306         return err;
1307 }
1308
1309 /* rtnl lock is held, process context */
1310 static int enic_stop(struct net_device *netdev)
1311 {
1312         struct enic *enic = netdev_priv(netdev);
1313         unsigned int i;
1314         int err;
1315
1316         del_timer_sync(&enic->notify_timer);
1317
1318         vnic_dev_disable(enic->vdev);
1319         napi_disable(&enic->napi);
1320         netif_stop_queue(netdev);
1321
1322         for (i = 0; i < enic->intr_count; i++)
1323                 vnic_intr_mask(&enic->intr[i]);
1324
1325         for (i = 0; i < enic->wq_count; i++) {
1326                 err = vnic_wq_disable(&enic->wq[i]);
1327                 if (err)
1328                         return err;
1329         }
1330         for (i = 0; i < enic->rq_count; i++) {
1331                 err = vnic_rq_disable(&enic->rq[i]);
1332                 if (err)
1333                         return err;
1334         }
1335
1336         vnic_dev_notify_unset(enic->vdev);
1337         enic_free_intr(enic);
1338
1339         (void)vnic_cq_service(&enic->cq[ENIC_CQ_RQ],
1340                 -1, enic_rq_service_drop, NULL);
1341         (void)vnic_cq_service(&enic->cq[ENIC_CQ_WQ],
1342                 -1, enic_wq_service, NULL);
1343
1344         for (i = 0; i < enic->wq_count; i++)
1345                 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
1346         for (i = 0; i < enic->rq_count; i++)
1347                 vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
1348         for (i = 0; i < enic->cq_count; i++)
1349                 vnic_cq_clean(&enic->cq[i]);
1350         for (i = 0; i < enic->intr_count; i++)
1351                 vnic_intr_clean(&enic->intr[i]);
1352
1353         return 0;
1354 }
1355
1356 static int enic_change_mtu(struct net_device *netdev, int new_mtu)
1357 {
1358         struct enic *enic = netdev_priv(netdev);
1359         int running = netif_running(netdev);
1360
1361         if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU)
1362                 return -EINVAL;
1363
1364         if (running)
1365                 enic_stop(netdev);
1366
1367         netdev->mtu = new_mtu;
1368
1369         if (netdev->mtu > enic->port_mtu)
1370                 printk(KERN_WARNING PFX
1371                         "%s: interface MTU (%d) set higher "
1372                         "than port MTU (%d)\n",
1373                         netdev->name, netdev->mtu, enic->port_mtu);
1374
1375         if (running)
1376                 enic_open(netdev);
1377
1378         return 0;
1379 }
1380
1381 #ifdef CONFIG_NET_POLL_CONTROLLER
1382 static void enic_poll_controller(struct net_device *netdev)
1383 {
1384         struct enic *enic = netdev_priv(netdev);
1385         struct vnic_dev *vdev = enic->vdev;
1386
1387         switch (vnic_dev_get_intr_mode(vdev)) {
1388         case VNIC_DEV_INTR_MODE_MSIX:
1389                 enic_isr_msix_rq(enic->pdev->irq, enic);
1390                 enic_isr_msix_wq(enic->pdev->irq, enic);
1391                 break;
1392         case VNIC_DEV_INTR_MODE_MSI:
1393                 enic_isr_msi(enic->pdev->irq, enic);
1394                 break;
1395         case VNIC_DEV_INTR_MODE_INTX:
1396                 enic_isr_legacy(enic->pdev->irq, netdev);
1397                 break;
1398         default:
1399                 break;
1400         }
1401 }
1402 #endif
1403
1404 static int enic_dev_wait(struct vnic_dev *vdev,
1405         int (*start)(struct vnic_dev *, int),
1406         int (*finished)(struct vnic_dev *, int *),
1407         int arg)
1408 {
1409         unsigned long time;
1410         int done;
1411         int err;
1412
1413         BUG_ON(in_interrupt());
1414
1415         err = start(vdev, arg);
1416         if (err)
1417                 return err;
1418
1419         /* Wait for func to complete...2 seconds max
1420          */
1421
1422         time = jiffies + (HZ * 2);
1423         do {
1424
1425                 err = finished(vdev, &done);
1426                 if (err)
1427                         return err;
1428
1429                 if (done)
1430                         return 0;
1431
1432                 schedule_timeout_uninterruptible(HZ / 10);
1433
1434         } while (time_after(time, jiffies));
1435
1436         return -ETIMEDOUT;
1437 }
1438
1439 static int enic_dev_open(struct enic *enic)
1440 {
1441         int err;
1442
1443         err = enic_dev_wait(enic->vdev, vnic_dev_open,
1444                 vnic_dev_open_done, 0);
1445         if (err)
1446                 printk(KERN_ERR PFX
1447                         "vNIC device open failed, err %d.\n", err);
1448
1449         return err;
1450 }
1451
1452 static int enic_dev_soft_reset(struct enic *enic)
1453 {
1454         int err;
1455
1456         err = enic_dev_wait(enic->vdev, vnic_dev_soft_reset,
1457                 vnic_dev_soft_reset_done, 0);
1458         if (err)
1459                 printk(KERN_ERR PFX
1460                         "vNIC soft reset failed, err %d.\n", err);
1461
1462         return err;
1463 }
1464
1465 static int enic_set_niccfg(struct enic *enic)
1466 {
1467         const u8 rss_default_cpu = 0;
1468         const u8 rss_hash_type = 0;
1469         const u8 rss_hash_bits = 0;
1470         const u8 rss_base_cpu = 0;
1471         const u8 rss_enable = 0;
1472         const u8 tso_ipid_split_en = 0;
1473         const u8 ig_vlan_strip_en = 1;
1474
1475         /* Enable VLAN tag stripping.  RSS not enabled (yet).
1476         */
1477
1478         return enic_set_nic_cfg(enic,
1479                 rss_default_cpu, rss_hash_type,
1480                 rss_hash_bits, rss_base_cpu,
1481                 rss_enable, tso_ipid_split_en,
1482                 ig_vlan_strip_en);
1483 }
1484
1485 static void enic_reset(struct work_struct *work)
1486 {
1487         struct enic *enic = container_of(work, struct enic, reset);
1488
1489         if (!netif_running(enic->netdev))
1490                 return;
1491
1492         rtnl_lock();
1493
1494         spin_lock(&enic->devcmd_lock);
1495         vnic_dev_hang_notify(enic->vdev);
1496         spin_unlock(&enic->devcmd_lock);
1497
1498         enic_stop(enic->netdev);
1499         enic_dev_soft_reset(enic);
1500         vnic_dev_init(enic->vdev, 0);
1501         enic_reset_mcaddrs(enic);
1502         enic_init_vnic_resources(enic);
1503         enic_set_niccfg(enic);
1504         enic_open(enic->netdev);
1505
1506         rtnl_unlock();
1507 }
1508
1509 static int enic_set_intr_mode(struct enic *enic)
1510 {
1511         unsigned int n = ARRAY_SIZE(enic->rq);
1512         unsigned int m = ARRAY_SIZE(enic->wq);
1513         unsigned int i;
1514
1515         /* Set interrupt mode (INTx, MSI, MSI-X) depending
1516          * system capabilities.
1517          *
1518          * Try MSI-X first
1519          *
1520          * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs
1521          * (the second to last INTR is used for WQ/RQ errors)
1522          * (the last INTR is used for notifications)
1523          */
1524
1525         BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2);
1526         for (i = 0; i < n + m + 2; i++)
1527                 enic->msix_entry[i].entry = i;
1528
1529         if (enic->config.intr_mode < 1 &&
1530             enic->rq_count >= n &&
1531             enic->wq_count >= m &&
1532             enic->cq_count >= n + m &&
1533             enic->intr_count >= n + m + 2 &&
1534             !pci_enable_msix(enic->pdev, enic->msix_entry, n + m + 2)) {
1535
1536                 enic->rq_count = n;
1537                 enic->wq_count = m;
1538                 enic->cq_count = n + m;
1539                 enic->intr_count = n + m + 2;
1540
1541                 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSIX);
1542
1543                 return 0;
1544         }
1545
1546         /* Next try MSI
1547          *
1548          * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR
1549          */
1550
1551         if (enic->config.intr_mode < 2 &&
1552             enic->rq_count >= 1 &&
1553             enic->wq_count >= 1 &&
1554             enic->cq_count >= 2 &&
1555             enic->intr_count >= 1 &&
1556             !pci_enable_msi(enic->pdev)) {
1557
1558                 enic->rq_count = 1;
1559                 enic->wq_count = 1;
1560                 enic->cq_count = 2;
1561                 enic->intr_count = 1;
1562
1563                 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI);
1564
1565                 return 0;
1566         }
1567
1568         /* Next try INTx
1569          *
1570          * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs
1571          * (the first INTR is used for WQ/RQ)
1572          * (the second INTR is used for WQ/RQ errors)
1573          * (the last INTR is used for notifications)
1574          */
1575
1576         if (enic->config.intr_mode < 3 &&
1577             enic->rq_count >= 1 &&
1578             enic->wq_count >= 1 &&
1579             enic->cq_count >= 2 &&
1580             enic->intr_count >= 3) {
1581
1582                 enic->rq_count = 1;
1583                 enic->wq_count = 1;
1584                 enic->cq_count = 2;
1585                 enic->intr_count = 3;
1586
1587                 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX);
1588
1589                 return 0;
1590         }
1591
1592         vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
1593
1594         return -EINVAL;
1595 }
1596
1597 static void enic_clear_intr_mode(struct enic *enic)
1598 {
1599         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1600         case VNIC_DEV_INTR_MODE_MSIX:
1601                 pci_disable_msix(enic->pdev);
1602                 break;
1603         case VNIC_DEV_INTR_MODE_MSI:
1604                 pci_disable_msi(enic->pdev);
1605                 break;
1606         default:
1607                 break;
1608         }
1609
1610         vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
1611 }
1612
1613 static void enic_iounmap(struct enic *enic)
1614 {
1615         if (enic->bar0.vaddr)
1616                 iounmap(enic->bar0.vaddr);
1617 }
1618
1619 static const struct net_device_ops enic_netdev_ops = {
1620         .ndo_open               = enic_open,
1621         .ndo_stop               = enic_stop,
1622         .ndo_start_xmit         = enic_hard_start_xmit,
1623         .ndo_get_stats          = enic_get_stats,
1624         .ndo_validate_addr      = eth_validate_addr,
1625         .ndo_set_mac_address    = eth_mac_addr,
1626         .ndo_set_multicast_list = enic_set_multicast_list,
1627         .ndo_change_mtu         = enic_change_mtu,
1628         .ndo_vlan_rx_register   = enic_vlan_rx_register,
1629         .ndo_vlan_rx_add_vid    = enic_vlan_rx_add_vid,
1630         .ndo_vlan_rx_kill_vid   = enic_vlan_rx_kill_vid,
1631         .ndo_tx_timeout         = enic_tx_timeout,
1632 #ifdef CONFIG_NET_POLL_CONTROLLER
1633         .ndo_poll_controller    = enic_poll_controller,
1634 #endif
1635 };
1636
1637 static int __devinit enic_probe(struct pci_dev *pdev,
1638         const struct pci_device_id *ent)
1639 {
1640         struct net_device *netdev;
1641         struct enic *enic;
1642         int using_dac = 0;
1643         unsigned int i;
1644         int err;
1645
1646         /* Allocate net device structure and initialize.  Private
1647          * instance data is initialized to zero.
1648          */
1649
1650         netdev = alloc_etherdev(sizeof(struct enic));
1651         if (!netdev) {
1652                 printk(KERN_ERR PFX "Etherdev alloc failed, aborting.\n");
1653                 return -ENOMEM;
1654         }
1655
1656         pci_set_drvdata(pdev, netdev);
1657
1658         SET_NETDEV_DEV(netdev, &pdev->dev);
1659
1660         enic = netdev_priv(netdev);
1661         enic->netdev = netdev;
1662         enic->pdev = pdev;
1663
1664         /* Setup PCI resources
1665          */
1666
1667         err = pci_enable_device(pdev);
1668         if (err) {
1669                 printk(KERN_ERR PFX
1670                         "Cannot enable PCI device, aborting.\n");
1671                 goto err_out_free_netdev;
1672         }
1673
1674         err = pci_request_regions(pdev, DRV_NAME);
1675         if (err) {
1676                 printk(KERN_ERR PFX
1677                         "Cannot request PCI regions, aborting.\n");
1678                 goto err_out_disable_device;
1679         }
1680
1681         pci_set_master(pdev);
1682
1683         /* Query PCI controller on system for DMA addressing
1684          * limitation for the device.  Try 40-bit first, and
1685          * fail to 32-bit.
1686          */
1687
1688         err = pci_set_dma_mask(pdev, DMA_40BIT_MASK);
1689         if (err) {
1690                 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
1691                 if (err) {
1692                         printk(KERN_ERR PFX
1693                                 "No usable DMA configuration, aborting.\n");
1694                         goto err_out_release_regions;
1695                 }
1696                 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
1697                 if (err) {
1698                         printk(KERN_ERR PFX
1699                                 "Unable to obtain 32-bit DMA "
1700                                 "for consistent allocations, aborting.\n");
1701                         goto err_out_release_regions;
1702                 }
1703         } else {
1704                 err = pci_set_consistent_dma_mask(pdev, DMA_40BIT_MASK);
1705                 if (err) {
1706                         printk(KERN_ERR PFX
1707                                 "Unable to obtain 40-bit DMA "
1708                                 "for consistent allocations, aborting.\n");
1709                         goto err_out_release_regions;
1710                 }
1711                 using_dac = 1;
1712         }
1713
1714         /* Map vNIC resources from BAR0
1715          */
1716
1717         if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
1718                 printk(KERN_ERR PFX
1719                         "BAR0 not memory-map'able, aborting.\n");
1720                 err = -ENODEV;
1721                 goto err_out_release_regions;
1722         }
1723
1724         enic->bar0.vaddr = pci_iomap(pdev, 0, enic->bar0.len);
1725         enic->bar0.bus_addr = pci_resource_start(pdev, 0);
1726         enic->bar0.len = pci_resource_len(pdev, 0);
1727
1728         if (!enic->bar0.vaddr) {
1729                 printk(KERN_ERR PFX
1730                         "Cannot memory-map BAR0 res hdr, aborting.\n");
1731                 err = -ENODEV;
1732                 goto err_out_release_regions;
1733         }
1734
1735         /* Register vNIC device
1736          */
1737
1738         enic->vdev = vnic_dev_register(NULL, enic, pdev, &enic->bar0);
1739         if (!enic->vdev) {
1740                 printk(KERN_ERR PFX
1741                         "vNIC registration failed, aborting.\n");
1742                 err = -ENODEV;
1743                 goto err_out_iounmap;
1744         }
1745
1746         /* Issue device open to get device in known state
1747          */
1748
1749         err = enic_dev_open(enic);
1750         if (err) {
1751                 printk(KERN_ERR PFX
1752                         "vNIC dev open failed, aborting.\n");
1753                 goto err_out_vnic_unregister;
1754         }
1755
1756         /* Issue device init to initialize the vnic-to-switch link.
1757          * We'll start with carrier off and wait for link UP
1758          * notification later to turn on carrier.  We don't need
1759          * to wait here for the vnic-to-switch link initialization
1760          * to complete; link UP notification is the indication that
1761          * the process is complete.
1762          */
1763
1764         netif_carrier_off(netdev);
1765
1766         err = vnic_dev_init(enic->vdev, 0);
1767         if (err) {
1768                 printk(KERN_ERR PFX
1769                         "vNIC dev init failed, aborting.\n");
1770                 goto err_out_dev_close;
1771         }
1772
1773         /* Get vNIC configuration
1774          */
1775
1776         err = enic_get_vnic_config(enic);
1777         if (err) {
1778                 printk(KERN_ERR PFX
1779                         "Get vNIC configuration failed, aborting.\n");
1780                 goto err_out_dev_close;
1781         }
1782
1783         /* Get available resource counts
1784          */
1785
1786         enic_get_res_counts(enic);
1787
1788         /* Set interrupt mode based on resource counts and system
1789          * capabilities
1790          */
1791
1792         err = enic_set_intr_mode(enic);
1793         if (err) {
1794                 printk(KERN_ERR PFX
1795                         "Failed to set intr mode, aborting.\n");
1796                 goto err_out_dev_close;
1797         }
1798
1799         /* Allocate and configure vNIC resources
1800          */
1801
1802         err = enic_alloc_vnic_resources(enic);
1803         if (err) {
1804                 printk(KERN_ERR PFX
1805                         "Failed to alloc vNIC resources, aborting.\n");
1806                 goto err_out_free_vnic_resources;
1807         }
1808
1809         enic_init_vnic_resources(enic);
1810
1811         err = enic_set_niccfg(enic);
1812         if (err) {
1813                 printk(KERN_ERR PFX
1814                         "Failed to config nic, aborting.\n");
1815                 goto err_out_free_vnic_resources;
1816         }
1817
1818         /* Setup notification timer, HW reset task, and locks
1819          */
1820
1821         init_timer(&enic->notify_timer);
1822         enic->notify_timer.function = enic_notify_timer;
1823         enic->notify_timer.data = (unsigned long)enic;
1824
1825         INIT_WORK(&enic->reset, enic_reset);
1826
1827         for (i = 0; i < enic->wq_count; i++)
1828                 spin_lock_init(&enic->wq_lock[i]);
1829
1830         spin_lock_init(&enic->devcmd_lock);
1831
1832         /* Register net device
1833          */
1834
1835         enic->port_mtu = enic->config.mtu;
1836         (void)enic_change_mtu(netdev, enic->port_mtu);
1837
1838         err = enic_set_mac_addr(netdev, enic->mac_addr);
1839         if (err) {
1840                 printk(KERN_ERR PFX
1841                         "Invalid MAC address, aborting.\n");
1842                 goto err_out_free_vnic_resources;
1843         }
1844
1845         netdev->netdev_ops = &enic_netdev_ops;
1846         netdev->watchdog_timeo = 2 * HZ;
1847         netdev->ethtool_ops = &enic_ethtool_ops;
1848
1849         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1850         default:
1851                 netif_napi_add(netdev, &enic->napi, enic_poll, 64);
1852                 break;
1853         case VNIC_DEV_INTR_MODE_MSIX:
1854                 netif_napi_add(netdev, &enic->napi, enic_poll_msix, 64);
1855                 break;
1856         }
1857
1858         netdev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
1859         if (ENIC_SETTING(enic, TXCSUM))
1860                 netdev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
1861         if (ENIC_SETTING(enic, TSO))
1862                 netdev->features |= NETIF_F_TSO |
1863                         NETIF_F_TSO6 | NETIF_F_TSO_ECN;
1864         if (ENIC_SETTING(enic, LRO))
1865                 netdev->features |= NETIF_F_LRO;
1866         if (using_dac)
1867                 netdev->features |= NETIF_F_HIGHDMA;
1868
1869         enic->csum_rx_enabled = ENIC_SETTING(enic, RXCSUM);
1870
1871         enic->lro_mgr.max_aggr = ENIC_LRO_MAX_AGGR;
1872         enic->lro_mgr.max_desc = ENIC_LRO_MAX_DESC;
1873         enic->lro_mgr.lro_arr = enic->lro_desc;
1874         enic->lro_mgr.get_skb_header = enic_get_skb_header;
1875         enic->lro_mgr.features  = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
1876         enic->lro_mgr.dev = netdev;
1877         enic->lro_mgr.ip_summed = CHECKSUM_COMPLETE;
1878         enic->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1879
1880         err = register_netdev(netdev);
1881         if (err) {
1882                 printk(KERN_ERR PFX
1883                         "Cannot register net device, aborting.\n");
1884                 goto err_out_free_vnic_resources;
1885         }
1886
1887         return 0;
1888
1889 err_out_free_vnic_resources:
1890         enic_free_vnic_resources(enic);
1891 err_out_dev_close:
1892         vnic_dev_close(enic->vdev);
1893 err_out_vnic_unregister:
1894         enic_clear_intr_mode(enic);
1895         vnic_dev_unregister(enic->vdev);
1896 err_out_iounmap:
1897         enic_iounmap(enic);
1898 err_out_release_regions:
1899         pci_release_regions(pdev);
1900 err_out_disable_device:
1901         pci_disable_device(pdev);
1902 err_out_free_netdev:
1903         pci_set_drvdata(pdev, NULL);
1904         free_netdev(netdev);
1905
1906         return err;
1907 }
1908
1909 static void __devexit enic_remove(struct pci_dev *pdev)
1910 {
1911         struct net_device *netdev = pci_get_drvdata(pdev);
1912
1913         if (netdev) {
1914                 struct enic *enic = netdev_priv(netdev);
1915
1916                 flush_scheduled_work();
1917                 unregister_netdev(netdev);
1918                 enic_free_vnic_resources(enic);
1919                 vnic_dev_close(enic->vdev);
1920                 enic_clear_intr_mode(enic);
1921                 vnic_dev_unregister(enic->vdev);
1922                 enic_iounmap(enic);
1923                 pci_release_regions(pdev);
1924                 pci_disable_device(pdev);
1925                 pci_set_drvdata(pdev, NULL);
1926                 free_netdev(netdev);
1927         }
1928 }
1929
1930 static struct pci_driver enic_driver = {
1931         .name = DRV_NAME,
1932         .id_table = enic_id_table,
1933         .probe = enic_probe,
1934         .remove = __devexit_p(enic_remove),
1935 };
1936
1937 static int __init enic_init_module(void)
1938 {
1939         printk(KERN_INFO PFX "%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
1940
1941         return pci_register_driver(&enic_driver);
1942 }
1943
1944 static void __exit enic_cleanup_module(void)
1945 {
1946         pci_unregister_driver(&enic_driver);
1947 }
1948
1949 module_init(enic_init_module);
1950 module_exit(enic_cleanup_module);