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
  38 #include "cq_enet_desc.h"
  39 #include "vnic_dev.h"
  40 #include "vnic_intr.h"
  41 #include "vnic_stats.h"
  42 #include "enic_res.h"
  43 #include "enic.h"
  44
  45 #define ENIC_NOTIFY_TIMER_PERIOD        (2 * HZ)
  46
  47 /* Supported devices */
  48 static struct pci_device_id enic_id_table[] = {
  49         { PCI_VDEVICE(CISCO, 0x0043) },
  50         { 0, }  /* end of table */
  51 };
  52
  53 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  54 MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>");
  55 MODULE_LICENSE("GPL");
  56 MODULE_VERSION(DRV_VERSION);
  57 MODULE_DEVICE_TABLE(pci, enic_id_table);
  58
  59 struct enic_stat {
  60         char name[ETH_GSTRING_LEN];
  61         unsigned int offset;
  62 };
  63
  64 #define ENIC_TX_STAT(stat)      \
  65         { .name = #stat, .offset = offsetof(struct vnic_tx_stats, stat) / 8 }
  66 #define ENIC_RX_STAT(stat)      \
  67         { .name = #stat, .offset = offsetof(struct vnic_rx_stats, stat) / 8 }
  68
  69 static const struct enic_stat enic_tx_stats[] = {
  70         ENIC_TX_STAT(tx_frames_ok),
  71         ENIC_TX_STAT(tx_unicast_frames_ok),
  72         ENIC_TX_STAT(tx_multicast_frames_ok),
  73         ENIC_TX_STAT(tx_broadcast_frames_ok),
  74         ENIC_TX_STAT(tx_bytes_ok),
  75         ENIC_TX_STAT(tx_unicast_bytes_ok),
  76         ENIC_TX_STAT(tx_multicast_bytes_ok),
  77         ENIC_TX_STAT(tx_broadcast_bytes_ok),
  78         ENIC_TX_STAT(tx_drops),
  79         ENIC_TX_STAT(tx_errors),
  80         ENIC_TX_STAT(tx_tso),
  81 };
  82
  83 static const struct enic_stat enic_rx_stats[] = {
  84         ENIC_RX_STAT(rx_frames_ok),
  85         ENIC_RX_STAT(rx_frames_total),
  86         ENIC_RX_STAT(rx_unicast_frames_ok),
  87         ENIC_RX_STAT(rx_multicast_frames_ok),
  88         ENIC_RX_STAT(rx_broadcast_frames_ok),
  89         ENIC_RX_STAT(rx_bytes_ok),
  90         ENIC_RX_STAT(rx_unicast_bytes_ok),
  91         ENIC_RX_STAT(rx_multicast_bytes_ok),
  92         ENIC_RX_STAT(rx_broadcast_bytes_ok),
  93         ENIC_RX_STAT(rx_drop),
  94         ENIC_RX_STAT(rx_no_bufs),
  95         ENIC_RX_STAT(rx_errors),
  96         ENIC_RX_STAT(rx_rss),
  97         ENIC_RX_STAT(rx_crc_errors),
  98         ENIC_RX_STAT(rx_frames_64),
  99         ENIC_RX_STAT(rx_frames_127),
 100         ENIC_RX_STAT(rx_frames_255),
 101         ENIC_RX_STAT(rx_frames_511),
 102         ENIC_RX_STAT(rx_frames_1023),
 103         ENIC_RX_STAT(rx_frames_1518),
 104         ENIC_RX_STAT(rx_frames_to_max),
 105 };
 106
 107 static const unsigned int enic_n_tx_stats = ARRAY_SIZE(enic_tx_stats);
 108 static const unsigned int enic_n_rx_stats = ARRAY_SIZE(enic_rx_stats);
 109
 110 static int enic_get_settings(struct net_device *netdev,
 111         struct ethtool_cmd *ecmd)
 112 {
 113         struct enic *enic = netdev_priv(netdev);
 114
 115         ecmd->supported = (SUPPORTED_10000baseT_Full | SUPPORTED_FIBRE);
 116         ecmd->advertising = (ADVERTISED_10000baseT_Full | ADVERTISED_FIBRE);
 117         ecmd->port = PORT_FIBRE;
 118         ecmd->transceiver = XCVR_EXTERNAL;
 119
 120         if (netif_carrier_ok(netdev)) {
 121                 ecmd->speed = vnic_dev_port_speed(enic->vdev);
 122                 ecmd->duplex = DUPLEX_FULL;
 123         } else {
 124                 ecmd->speed = -1;
 125                 ecmd->duplex = -1;
 126         }
 127
 128         ecmd->autoneg = AUTONEG_DISABLE;
 129
 130         return 0;
 131 }
 132
 133 static void enic_get_drvinfo(struct net_device *netdev,
 134         struct ethtool_drvinfo *drvinfo)
 135 {
 136         struct enic *enic = netdev_priv(netdev);
 137         struct vnic_devcmd_fw_info *fw_info;
 138
 139         spin_lock(&enic->devcmd_lock);
 140         vnic_dev_fw_info(enic->vdev, &fw_info);
 141         spin_unlock(&enic->devcmd_lock);
 142
 143         strncpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
 144         strncpy(drvinfo->version, DRV_VERSION, sizeof(drvinfo->version));
 145         strncpy(drvinfo->fw_version, fw_info->fw_version,
 146                 sizeof(drvinfo->fw_version));
 147         strncpy(drvinfo->bus_info, pci_name(enic->pdev),
 148                 sizeof(drvinfo->bus_info));
 149 }
 150
 151 static void enic_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
 152 {
 153         unsigned int i;
 154
 155         switch (stringset) {
 156         case ETH_SS_STATS:
 157                 for (i = 0; i < enic_n_tx_stats; i++) {
 158                         memcpy(data, enic_tx_stats[i].name, ETH_GSTRING_LEN);
 159                         data += ETH_GSTRING_LEN;
 160                 }
 161                 for (i = 0; i < enic_n_rx_stats; i++) {
 162                         memcpy(data, enic_rx_stats[i].name, ETH_GSTRING_LEN);
 163                         data += ETH_GSTRING_LEN;
 164                 }
 165                 break;
 166         }
 167 }
 168
 169 static int enic_get_sset_count(struct net_device *netdev, int sset)
 170 {
 171         switch (sset) {
 172         case ETH_SS_STATS:
 173                 return enic_n_tx_stats + enic_n_rx_stats;
 174         default:
 175                 return -EOPNOTSUPP;
 176         }
 177 }
 178
 179 static void enic_get_ethtool_stats(struct net_device *netdev,
 180         struct ethtool_stats *stats, u64 *data)
 181 {
 182         struct enic *enic = netdev_priv(netdev);
 183         struct vnic_stats *vstats;
 184         unsigned int i;
 185
 186         spin_lock(&enic->devcmd_lock);
 187         vnic_dev_stats_dump(enic->vdev, &vstats);
 188         spin_unlock(&enic->devcmd_lock);
 189
 190         for (i = 0; i < enic_n_tx_stats; i++)
 191                 *(data++) = ((u64 *)&vstats->tx)[enic_tx_stats[i].offset];
 192         for (i = 0; i < enic_n_rx_stats; i++)
 193                 *(data++) = ((u64 *)&vstats->rx)[enic_rx_stats[i].offset];
 194 }
 195
 196 static u32 enic_get_rx_csum(struct net_device *netdev)
 197 {
 198         struct enic *enic = netdev_priv(netdev);
 199         return enic->csum_rx_enabled;
 200 }
 201
 202 static int enic_set_rx_csum(struct net_device *netdev, u32 data)
 203 {
 204         struct enic *enic = netdev_priv(netdev);
 205
 206         if (data && !ENIC_SETTING(enic, RXCSUM))
 207                 return -EINVAL;
 208
 209         enic->csum_rx_enabled = !!data;
 210
 211         return 0;
 212 }
 213
 214 static int enic_set_tx_csum(struct net_device *netdev, u32 data)
 215 {
 216         struct enic *enic = netdev_priv(netdev);
 217
 218         if (data && !ENIC_SETTING(enic, TXCSUM))
 219                 return -EINVAL;
 220
 221         if (data)
 222                 netdev->features |= NETIF_F_HW_CSUM;
 223         else
 224                 netdev->features &= ~NETIF_F_HW_CSUM;
 225
 226         return 0;
 227 }
 228
 229 static int enic_set_tso(struct net_device *netdev, u32 data)
 230 {
 231         struct enic *enic = netdev_priv(netdev);
 232
 233         if (data && !ENIC_SETTING(enic, TSO))
 234                 return -EINVAL;
 235
 236         if (data)
 237                 netdev->features |=
 238                         NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN;
 239         else
 240                 netdev->features &=
 241                         ~(NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN);
 242
 243         return 0;
 244 }
 245
 246 static u32 enic_get_msglevel(struct net_device *netdev)
 247 {
 248         struct enic *enic = netdev_priv(netdev);
 249         return enic->msg_enable;
 250 }
 251
 252 static void enic_set_msglevel(struct net_device *netdev, u32 value)
 253 {
 254         struct enic *enic = netdev_priv(netdev);
 255         enic->msg_enable = value;
 256 }
 257
 258 static struct ethtool_ops enic_ethtool_ops = {
 259         .get_settings = enic_get_settings,
 260         .get_drvinfo = enic_get_drvinfo,
 261         .get_msglevel = enic_get_msglevel,
 262         .set_msglevel = enic_set_msglevel,
 263         .get_link = ethtool_op_get_link,
 264         .get_strings = enic_get_strings,
 265         .get_sset_count = enic_get_sset_count,
 266         .get_ethtool_stats = enic_get_ethtool_stats,
 267         .get_rx_csum = enic_get_rx_csum,
 268         .set_rx_csum = enic_set_rx_csum,
 269         .get_tx_csum = ethtool_op_get_tx_csum,
 270         .set_tx_csum = enic_set_tx_csum,
 271         .get_sg = ethtool_op_get_sg,
 272         .set_sg = ethtool_op_set_sg,
 273         .get_tso = ethtool_op_get_tso,
 274         .set_tso = enic_set_tso,
 275 };
 276
 277 static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
 278 {
 279         struct enic *enic = vnic_dev_priv(wq->vdev);
 280
 281         if (buf->sop)
 282                 pci_unmap_single(enic->pdev, buf->dma_addr,
 283                         buf->len, PCI_DMA_TODEVICE);
 284         else
 285                 pci_unmap_page(enic->pdev, buf->dma_addr,
 286                         buf->len, PCI_DMA_TODEVICE);
 287
 288         if (buf->os_buf)
 289                 dev_kfree_skb_any(buf->os_buf);
 290 }
 291
 292 static void enic_wq_free_buf(struct vnic_wq *wq,
 293         struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque)
 294 {
 295         enic_free_wq_buf(wq, buf);
 296 }
 297
 298 static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
 299         u8 type, u16 q_number, u16 completed_index, void *opaque)
 300 {
 301         struct enic *enic = vnic_dev_priv(vdev);
 302
 303         spin_lock(&enic->wq_lock[q_number]);
 304
 305         vnic_wq_service(&enic->wq[q_number], cq_desc,
 306                 completed_index, enic_wq_free_buf,
 307                 opaque);
 308
 309         if (netif_queue_stopped(enic->netdev) &&
 310             vnic_wq_desc_avail(&enic->wq[q_number]) >= MAX_SKB_FRAGS + 1)
 311                 netif_wake_queue(enic->netdev);
 312
 313         spin_unlock(&enic->wq_lock[q_number]);
 314
 315         return 0;
 316 }
 317
 318 static void enic_log_q_error(struct enic *enic)
 319 {
 320         unsigned int i;
 321         u32 error_status;
 322
 323         for (i = 0; i < enic->wq_count; i++) {
 324                 error_status = vnic_wq_error_status(&enic->wq[i]);
 325                 if (error_status)
 326                         printk(KERN_ERR PFX "%s: WQ[%d] error_status %d\n",
 327                                 enic->netdev->name, i, error_status);
 328         }
 329
 330         for (i = 0; i < enic->rq_count; i++) {
 331                 error_status = vnic_rq_error_status(&enic->rq[i]);
 332                 if (error_status)
 333                         printk(KERN_ERR PFX "%s: RQ[%d] error_status %d\n",
 334                                 enic->netdev->name, i, error_status);
 335         }
 336 }
 337
 338 static void enic_link_check(struct enic *enic)
 339 {
 340         int link_status = vnic_dev_link_status(enic->vdev);
 341         int carrier_ok = netif_carrier_ok(enic->netdev);
 342
 343         if (link_status && !carrier_ok) {
 344                 printk(KERN_INFO PFX "%s: Link UP\n", enic->netdev->name);
 345                 netif_carrier_on(enic->netdev);
 346         } else if (!link_status && carrier_ok) {
 347                 printk(KERN_INFO PFX "%s: Link DOWN\n", enic->netdev->name);
 348                 netif_carrier_off(enic->netdev);
 349         }
 350 }
 351
 352 static void enic_mtu_check(struct enic *enic)
 353 {
 354         u32 mtu = vnic_dev_mtu(enic->vdev);
 355
 356         if (mtu != enic->port_mtu) {
 357                 if (mtu < enic->netdev->mtu)
 358                         printk(KERN_WARNING PFX
 359                                 "%s: interface MTU (%d) set higher "
 360                                 "than switch port MTU (%d)\n",
 361                                 enic->netdev->name, enic->netdev->mtu, mtu);
 362                 enic->port_mtu = mtu;
 363         }
 364 }
 365
 366 static void enic_msglvl_check(struct enic *enic)
 367 {
 368         u32 msg_enable = vnic_dev_msg_lvl(enic->vdev);
 369
 370         if (msg_enable != enic->msg_enable) {
 371                 printk(KERN_INFO PFX "%s: msg lvl changed from 0x%x to 0x%x\n",
 372                         enic->netdev->name, enic->msg_enable, msg_enable);
 373                 enic->msg_enable = msg_enable;
 374         }
 375 }
 376
 377 static void enic_notify_check(struct enic *enic)
 378 {
 379         enic_msglvl_check(enic);
 380         enic_mtu_check(enic);
 381         enic_link_check(enic);
 382 }
 383
 384 #define ENIC_TEST_INTR(pba, i) (pba & (1 << i))
 385
 386 static irqreturn_t enic_isr_legacy(int irq, void *data)
 387 {
 388         struct net_device *netdev = data;
 389         struct enic *enic = netdev_priv(netdev);
 390         u32 pba;
 391
 392         vnic_intr_mask(&enic->intr[ENIC_INTX_WQ_RQ]);
 393
 394         pba = vnic_intr_legacy_pba(enic->legacy_pba);
 395         if (!pba) {
 396                 vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]);
 397                 return IRQ_NONE;        /* not our interrupt */
 398         }
 399
 400         if (ENIC_TEST_INTR(pba, ENIC_INTX_NOTIFY))
 401                 enic_notify_check(enic);
 402
 403         if (ENIC_TEST_INTR(pba, ENIC_INTX_ERR)) {
 404                 enic_log_q_error(enic);
 405                 /* schedule recovery from WQ/RQ error */
 406                 schedule_work(&enic->reset);
 407                 return IRQ_HANDLED;
 408         }
 409
 410         if (ENIC_TEST_INTR(pba, ENIC_INTX_WQ_RQ)) {
 411                 if (netif_rx_schedule_prep(netdev, &enic->napi))
 412                         __netif_rx_schedule(netdev, &enic->napi);
 413         } else {
 414                 vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]);
 415         }
 416
 417         return IRQ_HANDLED;
 418 }
 419
 420 static irqreturn_t enic_isr_msi(int irq, void *data)
 421 {
 422         struct enic *enic = data;
 423
 424         /* With MSI, there is no sharing of interrupts, so this is
 425          * our interrupt and there is no need to ack it.  The device
 426          * is not providing per-vector masking, so the OS will not
 427          * write to PCI config space to mask/unmask the interrupt.
 428          * We're using mask_on_assertion for MSI, so the device
 429          * automatically masks the interrupt when the interrupt is
 430          * generated.  Later, when exiting polling, the interrupt
 431          * will be unmasked (see enic_poll).
 432          *
 433          * Also, the device uses the same PCIe Traffic Class (TC)
 434          * for Memory Write data and MSI, so there are no ordering
 435          * issues; the MSI will always arrive at the Root Complex
 436          * _after_ corresponding Memory Writes (i.e. descriptor
 437          * writes).
 438          */
 439
 440         netif_rx_schedule(enic->netdev, &enic->napi);
 441
 442         return IRQ_HANDLED;
 443 }
 444
 445 static irqreturn_t enic_isr_msix_rq(int irq, void *data)
 446 {
 447         struct enic *enic = data;
 448
 449         /* schedule NAPI polling for RQ cleanup */
 450         netif_rx_schedule(enic->netdev, &enic->napi);
 451
 452         return IRQ_HANDLED;
 453 }
 454
 455 static irqreturn_t enic_isr_msix_wq(int irq, void *data)
 456 {
 457         struct enic *enic = data;
 458         unsigned int wq_work_to_do = -1; /* no limit */
 459         unsigned int wq_work_done;
 460
 461         wq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_WQ],
 462                 wq_work_to_do, enic_wq_service, NULL);
 463
 464         vnic_intr_return_credits(&enic->intr[ENIC_MSIX_WQ],
 465                 wq_work_done,
 466                 1 /* unmask intr */,
 467                 1 /* reset intr timer */);
 468
 469         return IRQ_HANDLED;
 470 }
 471
 472 static irqreturn_t enic_isr_msix_err(int irq, void *data)
 473 {
 474         struct enic *enic = data;
 475
 476         enic_log_q_error(enic);
 477
 478         /* schedule recovery from WQ/RQ error */
 479         schedule_work(&enic->reset);
 480
 481         return IRQ_HANDLED;
 482 }
 483
 484 static irqreturn_t enic_isr_msix_notify(int irq, void *data)
 485 {
 486         struct enic *enic = data;
 487
 488         enic_notify_check(enic);
 489         vnic_intr_unmask(&enic->intr[ENIC_MSIX_NOTIFY]);
 490
 491         return IRQ_HANDLED;
 492 }
 493
 494 static inline void enic_queue_wq_skb_cont(struct enic *enic,
 495         struct vnic_wq *wq, struct sk_buff *skb,
 496         unsigned int len_left)
 497 {
 498         skb_frag_t *frag;
 499
 500         /* Queue additional data fragments */
 501         for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
 502                 len_left -= frag->size;
 503                 enic_queue_wq_desc_cont(wq, skb,
 504                         pci_map_page(enic->pdev, frag->page,
 505                                 frag->page_offset, frag->size,
 506                                 PCI_DMA_TODEVICE),
 507                         frag->size,
 508                         (len_left == 0));       /* EOP? */
 509         }
 510 }
 511
 512 static inline void enic_queue_wq_skb_vlan(struct enic *enic,
 513         struct vnic_wq *wq, struct sk_buff *skb,
 514         int vlan_tag_insert, unsigned int vlan_tag)
 515 {
 516         unsigned int head_len = skb_headlen(skb);
 517         unsigned int len_left = skb->len - head_len;
 518         int eop = (len_left == 0);
 519
 520         /* Queue the main skb fragment */
 521         enic_queue_wq_desc(wq, skb,
 522                 pci_map_single(enic->pdev, skb->data,
 523                         head_len, PCI_DMA_TODEVICE),
 524                 head_len,
 525                 vlan_tag_insert, vlan_tag,
 526                 eop);
 527
 528         if (!eop)
 529                 enic_queue_wq_skb_cont(enic, wq, skb, len_left);
 530 }
 531
 532 static inline void enic_queue_wq_skb_csum_l4(struct enic *enic,
 533         struct vnic_wq *wq, struct sk_buff *skb,
 534         int vlan_tag_insert, unsigned int vlan_tag)
 535 {
 536         unsigned int head_len = skb_headlen(skb);
 537         unsigned int len_left = skb->len - head_len;
 538         unsigned int hdr_len = skb_transport_offset(skb);
 539         unsigned int csum_offset = hdr_len + skb->csum_offset;
 540         int eop = (len_left == 0);
 541
 542         /* Queue the main skb fragment */
 543         enic_queue_wq_desc_csum_l4(wq, skb,
 544                 pci_map_single(enic->pdev, skb->data,
 545                         head_len, PCI_DMA_TODEVICE),
 546                 head_len,
 547                 csum_offset,
 548                 hdr_len,
 549                 vlan_tag_insert, vlan_tag,
 550                 eop);
 551
 552         if (!eop)
 553                 enic_queue_wq_skb_cont(enic, wq, skb, len_left);
 554 }
 555
 556 static inline void enic_queue_wq_skb_tso(struct enic *enic,
 557         struct vnic_wq *wq, struct sk_buff *skb, unsigned int mss,
 558         int vlan_tag_insert, unsigned int vlan_tag)
 559 {
 560         unsigned int head_len = skb_headlen(skb);
 561         unsigned int len_left = skb->len - head_len;
 562         unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
 563         int eop = (len_left == 0);
 564
 565         /* Preload TCP csum field with IP pseudo hdr calculated
 566          * with IP length set to zero.  HW will later add in length
 567          * to each TCP segment resulting from the TSO.
 568          */
 569
 570         if (skb->protocol == __constant_htons(ETH_P_IP)) {
 571                 ip_hdr(skb)->check = 0;
 572                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr,
 573                         ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
 574         } else if (skb->protocol == __constant_htons(ETH_P_IPV6)) {
 575                 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
 576                         &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
 577         }
 578
 579         /* Queue the main skb fragment */
 580         enic_queue_wq_desc_tso(wq, skb,
 581                 pci_map_single(enic->pdev, skb->data,
 582                         head_len, PCI_DMA_TODEVICE),
 583                 head_len,
 584                 mss, hdr_len,
 585                 vlan_tag_insert, vlan_tag,
 586                 eop);
 587
 588         if (!eop)
 589                 enic_queue_wq_skb_cont(enic, wq, skb, len_left);
 590 }
 591
 592 static inline void enic_queue_wq_skb(struct enic *enic,
 593         struct vnic_wq *wq, struct sk_buff *skb)
 594 {
 595         unsigned int mss = skb_shinfo(skb)->gso_size;
 596         unsigned int vlan_tag = 0;
 597         int vlan_tag_insert = 0;
 598
 599         if (enic->vlan_group && vlan_tx_tag_present(skb)) {
 600                 /* VLAN tag from trunking driver */
 601                 vlan_tag_insert = 1;
 602                 vlan_tag = vlan_tx_tag_get(skb);
 603         }
 604
 605         if (mss)
 606                 enic_queue_wq_skb_tso(enic, wq, skb, mss,
 607                         vlan_tag_insert, vlan_tag);
 608         else if (skb->ip_summed == CHECKSUM_PARTIAL)
 609                 enic_queue_wq_skb_csum_l4(enic, wq, skb,
 610                         vlan_tag_insert, vlan_tag);
 611         else
 612                 enic_queue_wq_skb_vlan(enic, wq, skb,
 613                         vlan_tag_insert, vlan_tag);
 614 }
 615
 616 /* netif_tx_lock held, process context with BHs disabled */
 617 static int enic_hard_start_xmit(struct sk_buff *skb, struct net_device *netdev)
 618 {
 619         struct enic *enic = netdev_priv(netdev);
 620         struct vnic_wq *wq = &enic->wq[0];
 621         unsigned long flags;
 622
 623         if (skb->len <= 0) {
 624                 dev_kfree_skb(skb);
 625                 return NETDEV_TX_OK;
 626         }
 627
 628         /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs,
 629          * which is very likely.  In the off chance it's going to take
 630          * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb.
 631          */
 632
 633         if (skb_shinfo(skb)->gso_size == 0 &&
 634             skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC &&
 635             skb_linearize(skb)) {
 636                 dev_kfree_skb(skb);
 637                 return NETDEV_TX_OK;
 638         }
 639
 640         spin_lock_irqsave(&enic->wq_lock[0], flags);
 641
 642         if (vnic_wq_desc_avail(wq) < skb_shinfo(skb)->nr_frags + 1) {
 643                 netif_stop_queue(netdev);
 644                 /* This is a hard error, log it */
 645                 printk(KERN_ERR PFX "%s: BUG! Tx ring full when "
 646                         "queue awake!\n", netdev->name);
 647                 spin_unlock_irqrestore(&enic->wq_lock[0], flags);
 648                 return NETDEV_TX_BUSY;
 649         }
 650
 651         enic_queue_wq_skb(enic, wq, skb);
 652
 653         if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + 1)
 654                 netif_stop_queue(netdev);
 655
 656         netdev->trans_start = jiffies;
 657
 658         spin_unlock_irqrestore(&enic->wq_lock[0], flags);
 659
 660         return NETDEV_TX_OK;
 661 }
 662
 663 /* dev_base_lock rwlock held, nominally process context */
 664 static struct net_device_stats *enic_get_stats(struct net_device *netdev)
 665 {
 666         struct enic *enic = netdev_priv(netdev);
 667         struct net_device_stats *net_stats = &netdev->stats;
 668         struct vnic_stats *stats;
 669
 670         spin_lock(&enic->devcmd_lock);
 671         vnic_dev_stats_dump(enic->vdev, &stats);
 672         spin_unlock(&enic->devcmd_lock);
 673
 674         net_stats->tx_packets = stats->tx.tx_frames_ok;
 675         net_stats->tx_bytes = stats->tx.tx_bytes_ok;
 676         net_stats->tx_errors = stats->tx.tx_errors;
 677         net_stats->tx_dropped = stats->tx.tx_drops;
 678
 679         net_stats->rx_packets = stats->rx.rx_frames_ok;
 680         net_stats->rx_bytes = stats->rx.rx_bytes_ok;
 681         net_stats->rx_errors = stats->rx.rx_errors;
 682         net_stats->multicast = stats->rx.rx_multicast_frames_ok;
 683         net_stats->rx_crc_errors = stats->rx.rx_crc_errors;
 684         net_stats->rx_dropped = stats->rx.rx_no_bufs;
 685
 686         return net_stats;
 687 }
 688
 689 static void enic_reset_mcaddrs(struct enic *enic)
 690 {
 691         enic->mc_count = 0;
 692 }
 693
 694 static int enic_set_mac_addr(struct net_device *netdev, char *addr)
 695 {
 696         if (!is_valid_ether_addr(addr))
 697                 return -EADDRNOTAVAIL;
 698
 699         memcpy(netdev->dev_addr, addr, netdev->addr_len);
 700
 701         return 0;
 702 }
 703
 704 /* netif_tx_lock held, BHs disabled */
 705 static void enic_set_multicast_list(struct net_device *netdev)
 706 {
 707         struct enic *enic = netdev_priv(netdev);
 708         struct dev_mc_list *list = netdev->mc_list;
 709         int directed = 1;
 710         int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0;
 711         int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0;
 712         int promisc = (netdev->flags & IFF_PROMISC) ? 1 : 0;
 713         int allmulti = (netdev->flags & IFF_ALLMULTI) ||
 714             (netdev->mc_count > ENIC_MULTICAST_PERFECT_FILTERS);
 715         u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN];
 716         unsigned int mc_count = netdev->mc_count;
 717         unsigned int i, j;
 718
 719         if (mc_count > ENIC_MULTICAST_PERFECT_FILTERS)
 720                 mc_count = ENIC_MULTICAST_PERFECT_FILTERS;
 721
 722         spin_lock(&enic->devcmd_lock);
 723
 724         vnic_dev_packet_filter(enic->vdev, directed,
 725                 multicast, broadcast, promisc, allmulti);
 726
 727         /* Is there an easier way?  Trying to minimize to
 728          * calls to add/del multicast addrs.  We keep the
 729          * addrs from the last call in enic->mc_addr and
 730          * look for changes to add/del.
 731          */
 732
 733         for (i = 0; list && i < mc_count; i++) {
 734                 memcpy(mc_addr[i], list->dmi_addr, ETH_ALEN);
 735                 list = list->next;
 736         }
 737
 738         for (i = 0; i < enic->mc_count; i++) {
 739                 for (j = 0; j < mc_count; j++)
 740                         if (compare_ether_addr(enic->mc_addr[i],
 741                                 mc_addr[j]) == 0)
 742                                 break;
 743                 if (j == mc_count)
 744                         enic_del_multicast_addr(enic, enic->mc_addr[i]);
 745         }
 746
 747         for (i = 0; i < mc_count; i++) {
 748                 for (j = 0; j < enic->mc_count; j++)
 749                         if (compare_ether_addr(mc_addr[i],
 750                                 enic->mc_addr[j]) == 0)
 751                                 break;
 752                 if (j == enic->mc_count)
 753                         enic_add_multicast_addr(enic, mc_addr[i]);
 754         }
 755
 756         /* Save the list to compare against next time
 757          */
 758
 759         for (i = 0; i < mc_count; i++)
 760                 memcpy(enic->mc_addr[i], mc_addr[i], ETH_ALEN);
 761
 762         enic->mc_count = mc_count;
 763
 764         spin_unlock(&enic->devcmd_lock);
 765 }
 766
 767 /* rtnl lock is held */
 768 static void enic_vlan_rx_register(struct net_device *netdev,
 769         struct vlan_group *vlan_group)
 770 {
 771         struct enic *enic = netdev_priv(netdev);
 772         enic->vlan_group = vlan_group;
 773 }
 774
 775 /* rtnl lock is held */
 776 static void enic_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
 777 {
 778         struct enic *enic = netdev_priv(netdev);
 779
 780         spin_lock(&enic->devcmd_lock);
 781         enic_add_vlan(enic, vid);
 782         spin_unlock(&enic->devcmd_lock);
 783 }
 784
 785 /* rtnl lock is held */
 786 static void enic_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
 787 {
 788         struct enic *enic = netdev_priv(netdev);
 789
 790         spin_lock(&enic->devcmd_lock);
 791         enic_del_vlan(enic, vid);
 792         spin_unlock(&enic->devcmd_lock);
 793 }
 794
 795 /* netif_tx_lock held, BHs disabled */
 796 static void enic_tx_timeout(struct net_device *netdev)
 797 {
 798         struct enic *enic = netdev_priv(netdev);
 799         schedule_work(&enic->reset);
 800 }
 801
 802 static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
 803 {
 804         struct enic *enic = vnic_dev_priv(rq->vdev);
 805
 806         if (!buf->os_buf)
 807                 return;
 808
 809         pci_unmap_single(enic->pdev, buf->dma_addr,
 810                 buf->len, PCI_DMA_FROMDEVICE);
 811         dev_kfree_skb_any(buf->os_buf);
 812 }
 813
 814 static inline struct sk_buff *enic_rq_alloc_skb(unsigned int size)
 815 {
 816         struct sk_buff *skb;
 817
 818         skb = dev_alloc_skb(size + NET_IP_ALIGN);
 819
 820         if (skb)
 821                 skb_reserve(skb, NET_IP_ALIGN);
 822
 823         return skb;
 824 }
 825
 826 static int enic_rq_alloc_buf(struct vnic_rq *rq)
 827 {
 828         struct enic *enic = vnic_dev_priv(rq->vdev);
 829         struct sk_buff *skb;
 830         unsigned int len = enic->netdev->mtu + ETH_HLEN;
 831         unsigned int os_buf_index = 0;
 832         dma_addr_t dma_addr;
 833
 834         skb = enic_rq_alloc_skb(len);
 835         if (!skb)
 836                 return -ENOMEM;
 837
 838         dma_addr = pci_map_single(enic->pdev, skb->data,
 839                 len, PCI_DMA_FROMDEVICE);
 840
 841         enic_queue_rq_desc(rq, skb, os_buf_index,
 842                 dma_addr, len);
 843
 844         return 0;
 845 }
 846
 847 static int enic_get_skb_header(struct sk_buff *skb, void **iphdr,
 848         void **tcph, u64 *hdr_flags, void *priv)
 849 {
 850         struct cq_enet_rq_desc *cq_desc = priv;
 851         unsigned int ip_len;
 852         struct iphdr *iph;
 853
 854         u8 type, color, eop, sop, ingress_port, vlan_stripped;
 855         u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
 856         u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
 857         u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
 858         u8 packet_error;
 859         u16 q_number, completed_index, bytes_written, vlan, checksum;
 860         u32 rss_hash;
 861
 862         cq_enet_rq_desc_dec(cq_desc,
 863                 &type, &color, &q_number, &completed_index,
 864                 &ingress_port, &fcoe, &eop, &sop, &rss_type,
 865                 &csum_not_calc, &rss_hash, &bytes_written,
 866                 &packet_error, &vlan_stripped, &vlan, &checksum,
 867                 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
 868                 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
 869                 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
 870                 &fcs_ok);
 871
 872         if (!(ipv4 && tcp && !ipv4_fragment))
 873                 return -1;
 874
 875         skb_reset_network_header(skb);
 876         iph = ip_hdr(skb);
 877
 878         ip_len = ip_hdrlen(skb);
 879         skb_set_transport_header(skb, ip_len);
 880
 881         /* check if ip header and tcp header are complete */
 882         if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb))
 883                 return -1;
 884
 885         *hdr_flags = LRO_IPV4 | LRO_TCP;
 886         *tcph = tcp_hdr(skb);
 887         *iphdr = iph;
 888
 889         return 0;
 890 }
 891
 892 static void enic_rq_indicate_buf(struct vnic_rq *rq,
 893         struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
 894         int skipped, void *opaque)
 895 {
 896         struct enic *enic = vnic_dev_priv(rq->vdev);
 897         struct sk_buff *skb;
 898
 899         u8 type, color, eop, sop, ingress_port, vlan_stripped;
 900         u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
 901         u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
 902         u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
 903         u8 packet_error;
 904         u16 q_number, completed_index, bytes_written, vlan, checksum;
 905         u32 rss_hash;
 906
 907         if (skipped)
 908                 return;
 909
 910         skb = buf->os_buf;
 911         prefetch(skb->data - NET_IP_ALIGN);
 912         pci_unmap_single(enic->pdev, buf->dma_addr,
 913                 buf->len, PCI_DMA_FROMDEVICE);
 914
 915         cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
 916                 &type, &color, &q_number, &completed_index,
 917                 &ingress_port, &fcoe, &eop, &sop, &rss_type,
 918                 &csum_not_calc, &rss_hash, &bytes_written,
 919                 &packet_error, &vlan_stripped, &vlan, &checksum,
 920                 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
 921                 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
 922                 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
 923                 &fcs_ok);
 924
 925         if (packet_error) {
 926
 927                 if (bytes_written > 0 && !fcs_ok) {
 928                         if (net_ratelimit())
 929                                 printk(KERN_ERR PFX
 930                                         "%s: packet error: bad FCS\n",
 931                                         enic->netdev->name);
 932                 }
 933
 934                 dev_kfree_skb_any(skb);
 935
 936                 return;
 937         }
 938
 939         if (eop && bytes_written > 0) {
 940
 941                 /* Good receive
 942                  */
 943
 944                 skb_put(skb, bytes_written);
 945                 skb->protocol = eth_type_trans(skb, enic->netdev);
 946
 947                 if (enic->csum_rx_enabled && !csum_not_calc) {
 948                         skb->csum = htons(checksum);
 949                         skb->ip_summed = CHECKSUM_COMPLETE;
 950                 }
 951
 952                 skb->dev = enic->netdev;
 953                 enic->netdev->last_rx = jiffies;
 954
 955                 if (enic->vlan_group && vlan_stripped) {
 956
 957                         if (ENIC_SETTING(enic, LRO) && ipv4)
 958                                 lro_vlan_hwaccel_receive_skb(&enic->lro_mgr,
 959                                         skb, enic->vlan_group,
 960                                         vlan, cq_desc);
 961                         else
 962                                 vlan_hwaccel_receive_skb(skb,
 963                                         enic->vlan_group, vlan);
 964
 965                 } else {
 966
 967                         if (ENIC_SETTING(enic, LRO) && ipv4)
 968                                 lro_receive_skb(&enic->lro_mgr, skb, cq_desc);
 969                         else
 970                                 netif_receive_skb(skb);
 971
 972                 }
 973
 974         } else {
 975
 976                 /* Buffer overflow
 977                  */
 978
 979                 dev_kfree_skb_any(skb);
 980         }
 981 }
 982
 983 static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
 984         u8 type, u16 q_number, u16 completed_index, void *opaque)
 985 {
 986         struct enic *enic = vnic_dev_priv(vdev);
 987
 988         vnic_rq_service(&enic->rq[q_number], cq_desc,
 989                 completed_index, VNIC_RQ_RETURN_DESC,
 990                 enic_rq_indicate_buf, opaque);
 991
 992         return 0;
 993 }
 994
 995 static void enic_rq_drop_buf(struct vnic_rq *rq,
 996         struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
 997         int skipped, void *opaque)
 998 {
 999         struct enic *enic = vnic_dev_priv(rq->vdev);
1000         struct sk_buff *skb = buf->os_buf;
1001
1002         if (skipped)
1003                 return;
1004
1005         pci_unmap_single(enic->pdev, buf->dma_addr,
1006                 buf->len, PCI_DMA_FROMDEVICE);
1007
1008         dev_kfree_skb_any(skb);
1009 }
1010
1011 static int enic_rq_service_drop(struct vnic_dev *vdev, struct cq_desc *cq_desc,
1012         u8 type, u16 q_number, u16 completed_index, void *opaque)
1013 {
1014         struct enic *enic = vnic_dev_priv(vdev);
1015
1016         vnic_rq_service(&enic->rq[q_number], cq_desc,
1017                 completed_index, VNIC_RQ_RETURN_DESC,
1018                 enic_rq_drop_buf, opaque);
1019
1020         return 0;
1021 }
1022
1023 static int enic_poll(struct napi_struct *napi, int budget)
1024 {
1025         struct enic *enic = container_of(napi, struct enic, napi);
1026         struct net_device *netdev = enic->netdev;
1027         unsigned int rq_work_to_do = budget;
1028         unsigned int wq_work_to_do = -1; /* no limit */
1029         unsigned int  work_done, rq_work_done, wq_work_done;
1030
1031         /* Service RQ (first) and WQ
1032          */
1033
1034         rq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_RQ],
1035                 rq_work_to_do, enic_rq_service, NULL);
1036
1037         wq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_WQ],
1038                 wq_work_to_do, enic_wq_service, NULL);
1039
1040         /* Accumulate intr event credits for this polling
1041          * cycle.  An intr event is the completion of a
1042          * a WQ or RQ packet.
1043          */
1044
1045         work_done = rq_work_done + wq_work_done;
1046
1047         if (work_done > 0)
1048                 vnic_intr_return_credits(&enic->intr[ENIC_INTX_WQ_RQ],
1049                         work_done,
1050                         0 /* don't unmask intr */,
1051                         0 /* don't reset intr timer */);
1052
1053         if (rq_work_done > 0) {
1054
1055                 /* Replenish RQ
1056                  */
1057
1058                 vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1059
1060         } else {
1061
1062                 /* If no work done, flush all LROs and exit polling
1063                  */
1064
1065                 if (ENIC_SETTING(enic, LRO))
1066                         lro_flush_all(&enic->lro_mgr);
1067
1068                 netif_rx_complete(netdev, napi);
1069                 vnic_intr_unmask(&enic->intr[ENIC_MSIX_RQ]);
1070         }
1071
1072         return rq_work_done;
1073 }
1074
1075 static int enic_poll_msix(struct napi_struct *napi, int budget)
1076 {
1077         struct enic *enic = container_of(napi, struct enic, napi);
1078         struct net_device *netdev = enic->netdev;
1079         unsigned int work_to_do = budget;
1080         unsigned int work_done;
1081
1082         /* Service RQ
1083          */
1084
1085         work_done = vnic_cq_service(&enic->cq[ENIC_CQ_RQ],
1086                 work_to_do, enic_rq_service, NULL);
1087
1088         if (work_done > 0) {
1089
1090                 /* Replenish RQ
1091                  */
1092
1093                 vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1094
1095                 /* Accumulate intr event credits for this polling
1096                  * cycle.  An intr event is the completion of a
1097                  * a WQ or RQ packet.
1098                  */
1099
1100                 vnic_intr_return_credits(&enic->intr[ENIC_MSIX_RQ],
1101                         work_done,
1102                         0 /* don't unmask intr */,
1103                         0 /* don't reset intr timer */);
1104         } else {
1105
1106                 /* If no work done, flush all LROs and exit polling
1107                  */
1108
1109                 if (ENIC_SETTING(enic, LRO))
1110                         lro_flush_all(&enic->lro_mgr);
1111
1112                 netif_rx_complete(netdev, napi);
1113                 vnic_intr_unmask(&enic->intr[ENIC_MSIX_RQ]);
1114         }
1115
1116         return work_done;
1117 }
1118
1119 static void enic_notify_timer(unsigned long data)
1120 {
1121         struct enic *enic = (struct enic *)data;
1122
1123         enic_notify_check(enic);
1124
1125         mod_timer(&enic->notify_timer,
1126                 round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD));
1127 }
1128
1129 static void enic_free_intr(struct enic *enic)
1130 {
1131         struct net_device *netdev = enic->netdev;
1132         unsigned int i;
1133
1134         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1135         case VNIC_DEV_INTR_MODE_INTX:
1136                 free_irq(enic->pdev->irq, netdev);
1137                 break;
1138         case VNIC_DEV_INTR_MODE_MSI:
1139                 free_irq(enic->pdev->irq, enic);
1140                 break;
1141         case VNIC_DEV_INTR_MODE_MSIX:
1142                 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1143                         if (enic->msix[i].requested)
1144                                 free_irq(enic->msix_entry[i].vector,
1145                                         enic->msix[i].devid);
1146                 break;
1147         default:
1148                 break;
1149         }
1150 }
1151
1152 static int enic_request_intr(struct enic *enic)
1153 {
1154         struct net_device *netdev = enic->netdev;
1155         unsigned int i;
1156         int err = 0;
1157
1158         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1159
1160         case VNIC_DEV_INTR_MODE_INTX:
1161
1162                 err = request_irq(enic->pdev->irq, enic_isr_legacy,
1163                         IRQF_SHARED, netdev->name, netdev);
1164                 break;
1165
1166         case VNIC_DEV_INTR_MODE_MSI:
1167
1168                 err = request_irq(enic->pdev->irq, enic_isr_msi,
1169                         0, netdev->name, enic);
1170                 break;
1171
1172         case VNIC_DEV_INTR_MODE_MSIX:
1173
1174                 sprintf(enic->msix[ENIC_MSIX_RQ].devname,
1175                         "%.11s-rx-0", netdev->name);
1176                 enic->msix[ENIC_MSIX_RQ].isr = enic_isr_msix_rq;
1177                 enic->msix[ENIC_MSIX_RQ].devid = enic;
1178
1179                 sprintf(enic->msix[ENIC_MSIX_WQ].devname,
1180                         "%.11s-tx-0", netdev->name);
1181                 enic->msix[ENIC_MSIX_WQ].isr = enic_isr_msix_wq;
1182                 enic->msix[ENIC_MSIX_WQ].devid = enic;
1183
1184                 sprintf(enic->msix[ENIC_MSIX_ERR].devname,
1185                         "%.11s-err", netdev->name);
1186                 enic->msix[ENIC_MSIX_ERR].isr = enic_isr_msix_err;
1187                 enic->msix[ENIC_MSIX_ERR].devid = enic;
1188
1189                 sprintf(enic->msix[ENIC_MSIX_NOTIFY].devname,
1190                         "%.11s-notify", netdev->name);
1191                 enic->msix[ENIC_MSIX_NOTIFY].isr = enic_isr_msix_notify;
1192                 enic->msix[ENIC_MSIX_NOTIFY].devid = enic;
1193
1194                 for (i = 0; i < ARRAY_SIZE(enic->msix); i++) {
1195                         err = request_irq(enic->msix_entry[i].vector,
1196                                 enic->msix[i].isr, 0,
1197                                 enic->msix[i].devname,
1198                                 enic->msix[i].devid);
1199                         if (err) {
1200                                 enic_free_intr(enic);
1201                                 break;
1202                         }
1203                         enic->msix[i].requested = 1;
1204                 }
1205
1206                 break;
1207
1208         default:
1209                 break;
1210         }
1211
1212         return err;
1213 }
1214
1215 static int enic_notify_set(struct enic *enic)
1216 {
1217         int err;
1218
1219         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1220         case VNIC_DEV_INTR_MODE_INTX:
1221                 err = vnic_dev_notify_set(enic->vdev, ENIC_INTX_NOTIFY);
1222                 break;
1223         case VNIC_DEV_INTR_MODE_MSIX:
1224                 err = vnic_dev_notify_set(enic->vdev, ENIC_MSIX_NOTIFY);
1225                 break;
1226         default:
1227                 err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */);
1228                 break;
1229         }
1230
1231         return err;
1232 }
1233
1234 static void enic_notify_timer_start(struct enic *enic)
1235 {
1236         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1237         case VNIC_DEV_INTR_MODE_MSI:
1238                 mod_timer(&enic->notify_timer, jiffies);
1239                 break;
1240         default:
1241                 /* Using intr for notification for INTx/MSI-X */
1242                 break;
1243         };
1244 }
1245
1246 /* rtnl lock is held, process context */
1247 static int enic_open(struct net_device *netdev)
1248 {
1249         struct enic *enic = netdev_priv(netdev);
1250         unsigned int i;
1251         int err;
1252
1253         err = enic_request_intr(enic);
1254         if (err) {
1255                 printk(KERN_ERR PFX "%s: Unable to request irq.\n",
1256                         netdev->name);
1257                 return err;
1258         }
1259
1260         err = enic_notify_set(enic);
1261         if (err) {
1262                 printk(KERN_ERR PFX
1263                         "%s: Failed to alloc notify buffer, aborting.\n",
1264                         netdev->name);
1265                 goto err_out_free_intr;
1266         }
1267
1268         for (i = 0; i < enic->rq_count; i++) {
1269                 err = vnic_rq_fill(&enic->rq[i], enic_rq_alloc_buf);
1270                 if (err) {
1271                         printk(KERN_ERR PFX
1272                                 "%s: Unable to alloc receive buffers.\n",
1273                                 netdev->name);
1274                         goto err_out_notify_unset;
1275                 }
1276         }
1277
1278         for (i = 0; i < enic->wq_count; i++)
1279                 vnic_wq_enable(&enic->wq[i]);
1280         for (i = 0; i < enic->rq_count; i++)
1281                 vnic_rq_enable(&enic->rq[i]);
1282
1283         enic_add_station_addr(enic);
1284         enic_set_multicast_list(netdev);
1285
1286         netif_wake_queue(netdev);
1287         napi_enable(&enic->napi);
1288         vnic_dev_enable(enic->vdev);
1289
1290         for (i = 0; i < enic->intr_count; i++)
1291                 vnic_intr_unmask(&enic->intr[i]);
1292
1293         enic_notify_timer_start(enic);
1294
1295         return 0;
1296
1297 err_out_notify_unset:
1298         vnic_dev_notify_unset(enic->vdev);
1299 err_out_free_intr:
1300         enic_free_intr(enic);
1301
1302         return err;
1303 }
1304
1305 /* rtnl lock is held, process context */
1306 static int enic_stop(struct net_device *netdev)
1307 {
1308         struct enic *enic = netdev_priv(netdev);
1309         unsigned int i;
1310         int err;
1311
1312         del_timer_sync(&enic->notify_timer);
1313
1314         vnic_dev_disable(enic->vdev);
1315         napi_disable(&enic->napi);
1316         netif_stop_queue(netdev);
1317
1318         for (i = 0; i < enic->intr_count; i++)
1319                 vnic_intr_mask(&enic->intr[i]);
1320
1321         for (i = 0; i < enic->wq_count; i++) {
1322                 err = vnic_wq_disable(&enic->wq[i]);
1323                 if (err)
1324                         return err;
1325         }
1326         for (i = 0; i < enic->rq_count; i++) {
1327                 err = vnic_rq_disable(&enic->rq[i]);
1328                 if (err)
1329                         return err;
1330         }
1331
1332         vnic_dev_notify_unset(enic->vdev);
1333         enic_free_intr(enic);
1334
1335         (void)vnic_cq_service(&enic->cq[ENIC_CQ_RQ],
1336                 -1, enic_rq_service_drop, NULL);
1337         (void)vnic_cq_service(&enic->cq[ENIC_CQ_WQ],
1338                 -1, enic_wq_service, NULL);
1339
1340         for (i = 0; i < enic->wq_count; i++)
1341                 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
1342         for (i = 0; i < enic->rq_count; i++)
1343                 vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
1344         for (i = 0; i < enic->cq_count; i++)
1345                 vnic_cq_clean(&enic->cq[i]);
1346         for (i = 0; i < enic->intr_count; i++)
1347                 vnic_intr_clean(&enic->intr[i]);
1348
1349         return 0;
1350 }
1351
1352 static int enic_change_mtu(struct net_device *netdev, int new_mtu)
1353 {
1354         struct enic *enic = netdev_priv(netdev);
1355         int running = netif_running(netdev);
1356
1357         if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU)
1358                 return -EINVAL;
1359
1360         if (running)
1361                 enic_stop(netdev);
1362
1363         netdev->mtu = new_mtu;
1364
1365         if (netdev->mtu > enic->port_mtu)
1366                 printk(KERN_WARNING PFX
1367                         "%s: interface MTU (%d) set higher "
1368                         "than port MTU (%d)\n",
1369                         netdev->name, netdev->mtu, enic->port_mtu);
1370
1371         if (running)
1372                 enic_open(netdev);
1373
1374         return 0;
1375 }
1376
1377 #ifdef CONFIG_NET_POLL_CONTROLLER
1378 static void enic_poll_controller(struct net_device *netdev)
1379 {
1380         struct enic *enic = netdev_priv(netdev);
1381         struct vnic_dev *vdev = enic->vdev;
1382
1383         switch (vnic_dev_get_intr_mode(vdev)) {
1384         case VNIC_DEV_INTR_MODE_MSIX:
1385                 enic_isr_msix_rq(enic->pdev->irq, enic);
1386                 enic_isr_msix_wq(enic->pdev->irq, enic);
1387                 break;
1388         case VNIC_DEV_INTR_MODE_MSI:
1389                 enic_isr_msi(enic->pdev->irq, enic);
1390                 break;
1391         case VNIC_DEV_INTR_MODE_INTX:
1392                 enic_isr_legacy(enic->pdev->irq, netdev);
1393                 break;
1394         default:
1395                 break;
1396         }
1397 }
1398 #endif
1399
1400 static int enic_dev_wait(struct vnic_dev *vdev,
1401         int (*start)(struct vnic_dev *, int),
1402         int (*finished)(struct vnic_dev *, int *),
1403         int arg)
1404 {
1405         unsigned long time;
1406         int done;
1407         int err;
1408
1409         BUG_ON(in_interrupt());
1410
1411         err = start(vdev, arg);
1412         if (err)
1413                 return err;
1414
1415         /* Wait for func to complete...2 seconds max
1416          */
1417
1418         time = jiffies + (HZ * 2);
1419         do {
1420
1421                 err = finished(vdev, &done);
1422                 if (err)
1423                         return err;
1424
1425                 if (done)
1426                         return 0;
1427
1428                 schedule_timeout_uninterruptible(HZ / 10);
1429
1430         } while (time_after(time, jiffies));
1431
1432         return -ETIMEDOUT;
1433 }
1434
1435 static int enic_dev_open(struct enic *enic)
1436 {
1437         int err;
1438
1439         err = enic_dev_wait(enic->vdev, vnic_dev_open,
1440                 vnic_dev_open_done, 0);
1441         if (err)
1442                 printk(KERN_ERR PFX
1443                         "vNIC device open failed, err %d.\n", err);
1444
1445         return err;
1446 }
1447
1448 static int enic_dev_soft_reset(struct enic *enic)
1449 {
1450         int err;
1451
1452         err = enic_dev_wait(enic->vdev, vnic_dev_soft_reset,
1453                 vnic_dev_soft_reset_done, 0);
1454         if (err)
1455                 printk(KERN_ERR PFX
1456                         "vNIC soft reset failed, err %d.\n", err);
1457
1458         return err;
1459 }
1460
1461 static void enic_reset(struct work_struct *work)
1462 {
1463         struct enic *enic = container_of(work, struct enic, reset);
1464
1465         if (!netif_running(enic->netdev))
1466                 return;
1467
1468         rtnl_lock();
1469
1470         spin_lock(&enic->devcmd_lock);
1471         vnic_dev_hang_notify(enic->vdev);
1472         spin_unlock(&enic->devcmd_lock);
1473
1474         enic_stop(enic->netdev);
1475         enic_dev_soft_reset(enic);
1476         enic_reset_mcaddrs(enic);
1477         enic_init_vnic_resources(enic);
1478         enic_open(enic->netdev);
1479
1480         rtnl_unlock();
1481 }
1482
1483 static int enic_set_intr_mode(struct enic *enic)
1484 {
1485         unsigned int n = ARRAY_SIZE(enic->rq);
1486         unsigned int m = ARRAY_SIZE(enic->wq);
1487         unsigned int i;
1488
1489         /* Set interrupt mode (INTx, MSI, MSI-X) depending
1490          * system capabilities.
1491          *
1492          * Try MSI-X first
1493          *
1494          * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs
1495          * (the second to last INTR is used for WQ/RQ errors)
1496          * (the last INTR is used for notifications)
1497          */
1498
1499         BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2);
1500         for (i = 0; i < n + m + 2; i++)
1501                 enic->msix_entry[i].entry = i;
1502
1503         if (enic->config.intr_mode < 1 &&
1504             enic->rq_count >= n &&
1505             enic->wq_count >= m &&
1506             enic->cq_count >= n + m &&
1507             enic->intr_count >= n + m + 2 &&
1508             !pci_enable_msix(enic->pdev, enic->msix_entry, n + m + 2)) {
1509
1510                 enic->rq_count = n;
1511                 enic->wq_count = m;
1512                 enic->cq_count = n + m;
1513                 enic->intr_count = n + m + 2;
1514
1515                 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSIX);
1516
1517                 return 0;
1518         }
1519
1520         /* Next try MSI
1521          *
1522          * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR
1523          */
1524
1525         if (enic->config.intr_mode < 2 &&
1526             enic->rq_count >= 1 &&
1527             enic->wq_count >= 1 &&
1528             enic->cq_count >= 2 &&
1529             enic->intr_count >= 1 &&
1530             !pci_enable_msi(enic->pdev)) {
1531
1532                 enic->rq_count = 1;
1533                 enic->wq_count = 1;
1534                 enic->cq_count = 2;
1535                 enic->intr_count = 1;
1536
1537                 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI);
1538
1539                 return 0;
1540         }
1541
1542         /* Next try INTx
1543          *
1544          * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs
1545          * (the first INTR is used for WQ/RQ)
1546          * (the second INTR is used for WQ/RQ errors)
1547          * (the last INTR is used for notifications)
1548          */
1549
1550         if (enic->config.intr_mode < 3 &&
1551             enic->rq_count >= 1 &&
1552             enic->wq_count >= 1 &&
1553             enic->cq_count >= 2 &&
1554             enic->intr_count >= 3) {
1555
1556                 enic->rq_count = 1;
1557                 enic->wq_count = 1;
1558                 enic->cq_count = 2;
1559                 enic->intr_count = 3;
1560
1561                 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX);
1562
1563                 return 0;
1564         }
1565
1566         vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
1567
1568         return -EINVAL;
1569 }
1570
1571 static void enic_clear_intr_mode(struct enic *enic)
1572 {
1573         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1574         case VNIC_DEV_INTR_MODE_MSIX:
1575                 pci_disable_msix(enic->pdev);
1576                 break;
1577         case VNIC_DEV_INTR_MODE_MSI:
1578                 pci_disable_msi(enic->pdev);
1579                 break;
1580         default:
1581                 break;
1582         }
1583
1584         vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
1585 }
1586
1587 static void enic_iounmap(struct enic *enic)
1588 {
1589         if (enic->bar0.vaddr)
1590                 iounmap(enic->bar0.vaddr);
1591 }
1592
1593 static int __devinit enic_probe(struct pci_dev *pdev,
1594         const struct pci_device_id *ent)
1595 {
1596         struct net_device *netdev;
1597         struct enic *enic;
1598         int using_dac = 0;
1599         unsigned int i;
1600         int err;
1601
1602         const u8 rss_default_cpu = 0;
1603         const u8 rss_hash_type = 0;
1604         const u8 rss_hash_bits = 0;
1605         const u8 rss_base_cpu = 0;
1606         const u8 rss_enable = 0;
1607         const u8 tso_ipid_split_en = 0;
1608         const u8 ig_vlan_strip_en = 1;
1609
1610         /* Allocate net device structure and initialize.  Private
1611          * instance data is initialized to zero.
1612          */
1613
1614         netdev = alloc_etherdev(sizeof(struct enic));
1615         if (!netdev) {
1616                 printk(KERN_ERR PFX "Etherdev alloc failed, aborting.\n");
1617                 return -ENOMEM;
1618         }
1619
1620         pci_set_drvdata(pdev, netdev);
1621
1622         SET_NETDEV_DEV(netdev, &pdev->dev);
1623
1624         enic = netdev_priv(netdev);
1625         enic->netdev = netdev;
1626         enic->pdev = pdev;
1627
1628         /* Setup PCI resources
1629          */
1630
1631         err = pci_enable_device(pdev);
1632         if (err) {
1633                 printk(KERN_ERR PFX
1634                         "Cannot enable PCI device, aborting.\n");
1635                 goto err_out_free_netdev;
1636         }
1637
1638         err = pci_request_regions(pdev, DRV_NAME);
1639         if (err) {
1640                 printk(KERN_ERR PFX
1641                         "Cannot request PCI regions, aborting.\n");
1642                 goto err_out_disable_device;
1643         }
1644
1645         pci_set_master(pdev);
1646
1647         /* Query PCI controller on system for DMA addressing
1648          * limitation for the device.  Try 40-bit first, and
1649          * fail to 32-bit.
1650          */
1651
1652         err = pci_set_dma_mask(pdev, DMA_40BIT_MASK);
1653         if (err) {
1654                 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
1655                 if (err) {
1656                         printk(KERN_ERR PFX
1657                                 "No usable DMA configuration, aborting.\n");
1658                         goto err_out_release_regions;
1659                 }
1660                 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
1661                 if (err) {
1662                         printk(KERN_ERR PFX
1663                                 "Unable to obtain 32-bit DMA "
1664                                 "for consistent allocations, aborting.\n");
1665                         goto err_out_release_regions;
1666                 }
1667         } else {
1668                 err = pci_set_consistent_dma_mask(pdev, DMA_40BIT_MASK);
1669                 if (err) {
1670                         printk(KERN_ERR PFX
1671                                 "Unable to obtain 40-bit DMA "
1672                                 "for consistent allocations, aborting.\n");
1673                         goto err_out_release_regions;
1674                 }
1675                 using_dac = 1;
1676         }
1677
1678         /* Map vNIC resources from BAR0
1679          */
1680
1681         if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
1682                 printk(KERN_ERR PFX
1683                         "BAR0 not memory-map'able, aborting.\n");
1684                 err = -ENODEV;
1685                 goto err_out_release_regions;
1686         }
1687
1688         enic->bar0.vaddr = pci_iomap(pdev, 0, enic->bar0.len);
1689         enic->bar0.bus_addr = pci_resource_start(pdev, 0);
1690         enic->bar0.len = pci_resource_len(pdev, 0);
1691
1692         if (!enic->bar0.vaddr) {
1693                 printk(KERN_ERR PFX
1694                         "Cannot memory-map BAR0 res hdr, aborting.\n");
1695                 err = -ENODEV;
1696                 goto err_out_release_regions;
1697         }
1698
1699         /* Register vNIC device
1700          */
1701
1702         enic->vdev = vnic_dev_register(NULL, enic, pdev, &enic->bar0);
1703         if (!enic->vdev) {
1704                 printk(KERN_ERR PFX
1705                         "vNIC registration failed, aborting.\n");
1706                 err = -ENODEV;
1707                 goto err_out_iounmap;
1708         }
1709
1710         /* Issue device open to get device in known state
1711          */
1712
1713         err = enic_dev_open(enic);
1714         if (err) {
1715                 printk(KERN_ERR PFX
1716                         "vNIC dev open failed, aborting.\n");
1717                 goto err_out_vnic_unregister;
1718         }
1719
1720         /* Issue device init to initialize the vnic-to-switch link.
1721          * We'll start with carrier off and wait for link UP
1722          * notification later to turn on carrier.  We don't need
1723          * to wait here for the vnic-to-switch link initialization
1724          * to complete; link UP notification is the indication that
1725          * the process is complete.
1726          */
1727
1728         netif_carrier_off(netdev);
1729
1730         err = vnic_dev_init(enic->vdev, 0);
1731         if (err) {
1732                 printk(KERN_ERR PFX
1733                         "vNIC dev init failed, aborting.\n");
1734                 goto err_out_dev_close;
1735         }
1736
1737         /* Get vNIC configuration
1738          */
1739
1740         err = enic_get_vnic_config(enic);
1741         if (err) {
1742                 printk(KERN_ERR PFX
1743                         "Get vNIC configuration failed, aborting.\n");
1744                 goto err_out_dev_close;
1745         }
1746
1747         /* Get available resource counts
1748         */
1749
1750         enic_get_res_counts(enic);
1751
1752         /* Set interrupt mode based on resource counts and system
1753          * capabilities
1754         */
1755
1756         err = enic_set_intr_mode(enic);
1757         if (err) {
1758                 printk(KERN_ERR PFX
1759                         "Failed to set intr mode, aborting.\n");
1760                 goto err_out_dev_close;
1761         }
1762
1763         /* Allocate and configure vNIC resources
1764          */
1765
1766         err = enic_alloc_vnic_resources(enic);
1767         if (err) {
1768                 printk(KERN_ERR PFX
1769                         "Failed to alloc vNIC resources, aborting.\n");
1770                 goto err_out_free_vnic_resources;
1771         }
1772
1773         enic_init_vnic_resources(enic);
1774
1775         /* Enable VLAN tag stripping.  RSS not enabled (yet).
1776          */
1777
1778         err = enic_set_nic_cfg(enic,
1779                 rss_default_cpu, rss_hash_type,
1780                 rss_hash_bits, rss_base_cpu,
1781                 rss_enable, tso_ipid_split_en,
1782                 ig_vlan_strip_en);
1783         if (err) {
1784                 printk(KERN_ERR PFX
1785                         "Failed to config nic, aborting.\n");
1786                 goto err_out_free_vnic_resources;
1787         }
1788
1789         /* Setup notification timer, HW reset task, and locks
1790          */
1791
1792         init_timer(&enic->notify_timer);
1793         enic->notify_timer.function = enic_notify_timer;
1794         enic->notify_timer.data = (unsigned long)enic;
1795
1796         INIT_WORK(&enic->reset, enic_reset);
1797
1798         for (i = 0; i < enic->wq_count; i++)
1799                 spin_lock_init(&enic->wq_lock[i]);
1800
1801         spin_lock_init(&enic->devcmd_lock);
1802
1803         /* Register net device
1804          */
1805
1806         enic->port_mtu = enic->config.mtu;
1807         (void)enic_change_mtu(netdev, enic->port_mtu);
1808
1809         err = enic_set_mac_addr(netdev, enic->mac_addr);
1810         if (err) {
1811                 printk(KERN_ERR PFX
1812                         "Invalid MAC address, aborting.\n");
1813                 goto err_out_free_vnic_resources;
1814         }
1815
1816         netdev->open = enic_open;
1817         netdev->stop = enic_stop;
1818         netdev->hard_start_xmit = enic_hard_start_xmit;
1819         netdev->get_stats = enic_get_stats;
1820         netdev->set_multicast_list = enic_set_multicast_list;
1821         netdev->change_mtu = enic_change_mtu;
1822         netdev->vlan_rx_register = enic_vlan_rx_register;
1823         netdev->vlan_rx_add_vid = enic_vlan_rx_add_vid;
1824         netdev->vlan_rx_kill_vid = enic_vlan_rx_kill_vid;
1825         netdev->tx_timeout = enic_tx_timeout;
1826         netdev->watchdog_timeo = 2 * HZ;
1827         netdev->ethtool_ops = &enic_ethtool_ops;
1828 #ifdef CONFIG_NET_POLL_CONTROLLER
1829         netdev->poll_controller = enic_poll_controller;
1830 #endif
1831
1832         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1833         default:
1834                 netif_napi_add(netdev, &enic->napi, enic_poll, 64);
1835                 break;
1836         case VNIC_DEV_INTR_MODE_MSIX:
1837                 netif_napi_add(netdev, &enic->napi, enic_poll_msix, 64);
1838                 break;
1839         }
1840
1841         netdev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
1842         if (ENIC_SETTING(enic, TXCSUM))
1843                 netdev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
1844         if (ENIC_SETTING(enic, TSO))
1845                 netdev->features |= NETIF_F_TSO |
1846                         NETIF_F_TSO6 | NETIF_F_TSO_ECN;
1847         if (using_dac)
1848                 netdev->features |= NETIF_F_HIGHDMA;
1849
1850
1851         enic->csum_rx_enabled = ENIC_SETTING(enic, RXCSUM);
1852
1853         if (ENIC_SETTING(enic, LRO)) {
1854                 enic->lro_mgr.max_aggr = ENIC_LRO_MAX_AGGR;
1855                 enic->lro_mgr.max_desc = ENIC_LRO_MAX_DESC;
1856                 enic->lro_mgr.lro_arr = enic->lro_desc;
1857                 enic->lro_mgr.get_skb_header = enic_get_skb_header;
1858                 enic->lro_mgr.features  = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
1859                 enic->lro_mgr.dev = netdev;
1860                 enic->lro_mgr.ip_summed = CHECKSUM_COMPLETE;
1861                 enic->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1862         }
1863
1864         err = register_netdev(netdev);
1865         if (err) {
1866                 printk(KERN_ERR PFX
1867                         "Cannot register net device, aborting.\n");
1868                 goto err_out_free_vnic_resources;
1869         }
1870
1871         return 0;
1872
1873 err_out_free_vnic_resources:
1874         enic_free_vnic_resources(enic);
1875 err_out_dev_close:
1876         vnic_dev_close(enic->vdev);
1877 err_out_vnic_unregister:
1878         enic_clear_intr_mode(enic);
1879         vnic_dev_unregister(enic->vdev);
1880 err_out_iounmap:
1881         enic_iounmap(enic);
1882 err_out_release_regions:
1883         pci_release_regions(pdev);
1884 err_out_disable_device:
1885         pci_disable_device(pdev);
1886 err_out_free_netdev:
1887         pci_set_drvdata(pdev, NULL);
1888         free_netdev(netdev);
1889
1890         return err;
1891 }
1892
1893 static void __devexit enic_remove(struct pci_dev *pdev)
1894 {
1895         struct net_device *netdev = pci_get_drvdata(pdev);
1896
1897         if (netdev) {
1898                 struct enic *enic = netdev_priv(netdev);
1899
1900                 flush_scheduled_work();
1901                 unregister_netdev(netdev);
1902                 enic_free_vnic_resources(enic);
1903                 vnic_dev_close(enic->vdev);
1904                 enic_clear_intr_mode(enic);
1905                 vnic_dev_unregister(enic->vdev);
1906                 enic_iounmap(enic);
1907                 pci_release_regions(pdev);
1908                 pci_disable_device(pdev);
1909                 pci_set_drvdata(pdev, NULL);
1910                 free_netdev(netdev);
1911         }
1912 }
1913
1914 static struct pci_driver enic_driver = {
1915         .name = DRV_NAME,
1916         .id_table = enic_id_table,
1917         .probe = enic_probe,
1918         .remove = __devexit_p(enic_remove),
1919 };
1920
1921 static int __init enic_init_module(void)
1922 {
1923         printk(KERN_INFO PFX "%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
1924
1925         return pci_register_driver(&enic_driver);
1926 }
1927
1928 static void __exit enic_cleanup_module(void)
1929 {
1930         pci_unregister_driver(&enic_driver);
1931 }
1932
1933 module_init(enic_init_module);
1934 module_exit(enic_cleanup_module);