git.maemo.org Git - h-e-n/blob - drivers/net/enic/enic_main.c

   1 /*
   2  * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
   3  * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
   4  *
   5  * This program is free software; you may redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; version 2 of the License.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  10  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  11  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  12  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  13  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  14  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  15  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  16  * SOFTWARE.
  17  *
  18  */
  19
  20 #include <linux/module.h>
  21 #include <linux/kernel.h>
  22 #include <linux/string.h>
  23 #include <linux/errno.h>
  24 #include <linux/types.h>
  25 #include <linux/init.h>
  26 #include <linux/workqueue.h>
  27 #include <linux/pci.h>
  28 #include <linux/netdevice.h>
  29 #include <linux/etherdevice.h>
  30 #include <linux/if_ether.h>
  31 #include <linux/if_vlan.h>
  32 #include <linux/ethtool.h>
  33 #include <linux/in.h>
  34 #include <linux/ip.h>
  35 #include <linux/ipv6.h>
  36 #include <linux/tcp.h>
  37
  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 #define ENIC_JUMBO_FIRST_BUF_SIZE       256
  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_stats_count(struct net_device *netdev)
 171 {
 172         return enic_n_tx_stats + enic_n_rx_stats;
 173 }
 174
 175 static void enic_get_ethtool_stats(struct net_device *netdev,
 176         struct ethtool_stats *stats, u64 *data)
 177 {
 178         struct enic *enic = netdev_priv(netdev);
 179         struct vnic_stats *vstats;
 180         unsigned int i;
 181
 182         spin_lock(&enic->devcmd_lock);
 183         vnic_dev_stats_dump(enic->vdev, &vstats);
 184         spin_unlock(&enic->devcmd_lock);
 185
 186         for (i = 0; i < enic_n_tx_stats; i++)
 187                 *(data++) = ((u64 *)&vstats->tx)[enic_tx_stats[i].offset];
 188         for (i = 0; i < enic_n_rx_stats; i++)
 189                 *(data++) = ((u64 *)&vstats->rx)[enic_rx_stats[i].offset];
 190 }
 191
 192 static u32 enic_get_rx_csum(struct net_device *netdev)
 193 {
 194         struct enic *enic = netdev_priv(netdev);
 195         return enic->csum_rx_enabled;
 196 }
 197
 198 static int enic_set_rx_csum(struct net_device *netdev, u32 data)
 199 {
 200         struct enic *enic = netdev_priv(netdev);
 201
 202         enic->csum_rx_enabled =
 203                 (data && ENIC_SETTING(enic, RXCSUM)) ? 1 : 0;
 204
 205         return 0;
 206 }
 207
 208 static int enic_set_tx_csum(struct net_device *netdev, u32 data)
 209 {
 210         struct enic *enic = netdev_priv(netdev);
 211
 212         if (data && ENIC_SETTING(enic, TXCSUM))
 213                 netdev->features |= NETIF_F_HW_CSUM;
 214         else
 215                 netdev->features &= ~NETIF_F_HW_CSUM;
 216
 217         return 0;
 218 }
 219
 220 static int enic_set_tso(struct net_device *netdev, u32 data)
 221 {
 222         struct enic *enic = netdev_priv(netdev);
 223
 224         if (data && ENIC_SETTING(enic, TSO))
 225                 netdev->features |=
 226                         NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN;
 227         else
 228                 netdev->features &=
 229                         ~(NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN);
 230
 231         return 0;
 232 }
 233
 234 static u32 enic_get_msglevel(struct net_device *netdev)
 235 {
 236         struct enic *enic = netdev_priv(netdev);
 237         return enic->msg_enable;
 238 }
 239
 240 static void enic_set_msglevel(struct net_device *netdev, u32 value)
 241 {
 242         struct enic *enic = netdev_priv(netdev);
 243         enic->msg_enable = value;
 244 }
 245
 246 static struct ethtool_ops enic_ethtool_ops = {
 247         .get_settings = enic_get_settings,
 248         .get_drvinfo = enic_get_drvinfo,
 249         .get_msglevel = enic_get_msglevel,
 250         .set_msglevel = enic_set_msglevel,
 251         .get_link = ethtool_op_get_link,
 252         .get_strings = enic_get_strings,
 253         .get_stats_count = enic_get_stats_count,
 254         .get_ethtool_stats = enic_get_ethtool_stats,
 255         .get_rx_csum = enic_get_rx_csum,
 256         .set_rx_csum = enic_set_rx_csum,
 257         .get_tx_csum = ethtool_op_get_tx_csum,
 258         .set_tx_csum = enic_set_tx_csum,
 259         .get_sg = ethtool_op_get_sg,
 260         .set_sg = ethtool_op_set_sg,
 261         .get_tso = ethtool_op_get_tso,
 262         .set_tso = enic_set_tso,
 263 };
 264
 265 static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
 266 {
 267         struct enic *enic = vnic_dev_priv(wq->vdev);
 268
 269         if (buf->sop)
 270                 pci_unmap_single(enic->pdev, buf->dma_addr,
 271                         buf->len, PCI_DMA_TODEVICE);
 272         else
 273                 pci_unmap_page(enic->pdev, buf->dma_addr,
 274                         buf->len, PCI_DMA_TODEVICE);
 275
 276         if (buf->os_buf)
 277                 dev_kfree_skb_any(buf->os_buf);
 278 }
 279
 280 static void enic_wq_free_buf(struct vnic_wq *wq,
 281         struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque)
 282 {
 283         enic_free_wq_buf(wq, buf);
 284 }
 285
 286 static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
 287         u8 type, u16 q_number, u16 completed_index, void *opaque)
 288 {
 289         struct enic *enic = vnic_dev_priv(vdev);
 290
 291         spin_lock(&enic->wq_lock[q_number]);
 292
 293         vnic_wq_service(&enic->wq[q_number], cq_desc,
 294                 completed_index, enic_wq_free_buf,
 295                 opaque);
 296
 297         if (netif_queue_stopped(enic->netdev) &&
 298             vnic_wq_desc_avail(&enic->wq[q_number]) >= MAX_SKB_FRAGS + 1)
 299                 netif_wake_queue(enic->netdev);
 300
 301         spin_unlock(&enic->wq_lock[q_number]);
 302
 303         return 0;
 304 }
 305
 306 static void enic_log_q_error(struct enic *enic)
 307 {
 308         unsigned int i;
 309         u32 error_status;
 310
 311         for (i = 0; i < enic->wq_count; i++) {
 312                 error_status = vnic_wq_error_status(&enic->wq[i]);
 313                 if (error_status)
 314                         printk(KERN_ERR PFX "%s: WQ[%d] error_status %d\n",
 315                                 enic->netdev->name, i, error_status);
 316         }
 317
 318         for (i = 0; i < enic->rq_count; i++) {
 319                 error_status = vnic_rq_error_status(&enic->rq[i]);
 320                 if (error_status)
 321                         printk(KERN_ERR PFX "%s: RQ[%d] error_status %d\n",
 322                                 enic->netdev->name, i, error_status);
 323         }
 324 }
 325
 326 static void enic_link_check(struct enic *enic)
 327 {
 328         int link_status = vnic_dev_link_status(enic->vdev);
 329         int carrier_ok = netif_carrier_ok(enic->netdev);
 330
 331         if (link_status && !carrier_ok) {
 332                 printk(KERN_INFO PFX "%s: Link UP\n", enic->netdev->name);
 333                 netif_carrier_on(enic->netdev);
 334         } else if (!link_status && carrier_ok) {
 335                 printk(KERN_INFO PFX "%s: Link DOWN\n", enic->netdev->name);
 336                 netif_carrier_off(enic->netdev);
 337         }
 338 }
 339
 340 static void enic_mtu_check(struct enic *enic)
 341 {
 342         u32 mtu = vnic_dev_mtu(enic->vdev);
 343
 344         if (mtu != enic->port_mtu) {
 345                 if (mtu < enic->netdev->mtu)
 346                         printk(KERN_WARNING PFX
 347                                 "%s: interface MTU (%d) set higher "
 348                                 "than switch port MTU (%d)\n",
 349                                 enic->netdev->name, enic->netdev->mtu, mtu);
 350                 enic->port_mtu = mtu;
 351         }
 352 }
 353
 354 static void enic_msglvl_check(struct enic *enic)
 355 {
 356         u32 msg_enable = vnic_dev_msg_lvl(enic->vdev);
 357
 358         if (msg_enable != enic->msg_enable) {
 359                 printk(KERN_INFO PFX "%s: msg lvl changed from 0x%x to 0x%x\n",
 360                         enic->netdev->name, enic->msg_enable, msg_enable);
 361                 enic->msg_enable = msg_enable;
 362         }
 363 }
 364
 365 static void enic_notify_check(struct enic *enic)
 366 {
 367         enic_msglvl_check(enic);
 368         enic_mtu_check(enic);
 369         enic_link_check(enic);
 370 }
 371
 372 #define ENIC_TEST_INTR(pba, i) (pba & (1 << i))
 373
 374 static irqreturn_t enic_isr_legacy(int irq, void *data)
 375 {
 376         struct net_device *netdev = data;
 377         struct enic *enic = netdev_priv(netdev);
 378         u32 pba;
 379
 380         vnic_intr_mask(&enic->intr[ENIC_INTX_WQ_RQ]);
 381
 382         pba = vnic_intr_legacy_pba(enic->legacy_pba);
 383         if (!pba) {
 384                 vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]);
 385                 return IRQ_NONE;        /* not our interrupt */
 386         }
 387
 388         if (ENIC_TEST_INTR(pba, ENIC_INTX_NOTIFY))
 389                 enic_notify_check(enic);
 390
 391         if (ENIC_TEST_INTR(pba, ENIC_INTX_ERR)) {
 392                 enic_log_q_error(enic);
 393                 /* schedule recovery from WQ/RQ error */
 394                 schedule_work(&enic->reset);
 395                 return IRQ_HANDLED;
 396         }
 397
 398         if (ENIC_TEST_INTR(pba, ENIC_INTX_WQ_RQ)) {
 399                 if (netif_rx_schedule_prep(netdev, &enic->napi))
 400                         __netif_rx_schedule(netdev, &enic->napi);
 401         } else {
 402                 vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]);
 403         }
 404
 405         return IRQ_HANDLED;
 406 }
 407
 408 static irqreturn_t enic_isr_msi(int irq, void *data)
 409 {
 410         struct enic *enic = data;
 411
 412         /* With MSI, there is no sharing of interrupts, so this is
 413          * our interrupt and there is no need to ack it.  The device
 414          * is not providing per-vector masking, so the OS will not
 415          * write to PCI config space to mask/unmask the interrupt.
 416          * We're using mask_on_assertion for MSI, so the device
 417          * automatically masks the interrupt when the interrupt is
 418          * generated.  Later, when exiting polling, the interrupt
 419          * will be unmasked (see enic_poll).
 420          *
 421          * Also, the device uses the same PCIe Traffic Class (TC)
 422          * for Memory Write data and MSI, so there are no ordering
 423          * issues; the MSI will always arrive at the Root Complex
 424          * _after_ corresponding Memory Writes (i.e. descriptor
 425          * writes).
 426          */
 427
 428         netif_rx_schedule(enic->netdev, &enic->napi);
 429
 430         return IRQ_HANDLED;
 431 }
 432
 433 static irqreturn_t enic_isr_msix_rq(int irq, void *data)
 434 {
 435         struct enic *enic = data;
 436
 437         /* schedule NAPI polling for RQ cleanup */
 438         netif_rx_schedule(enic->netdev, &enic->napi);
 439
 440         return IRQ_HANDLED;
 441 }
 442
 443 static irqreturn_t enic_isr_msix_wq(int irq, void *data)
 444 {
 445         struct enic *enic = data;
 446         unsigned int wq_work_to_do = -1; /* no limit */
 447         unsigned int wq_work_done;
 448
 449         wq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_WQ],
 450                 wq_work_to_do, enic_wq_service, NULL);
 451
 452         vnic_intr_return_credits(&enic->intr[ENIC_MSIX_WQ],
 453                 wq_work_done,
 454                 1 /* unmask intr */,
 455                 1 /* reset intr timer */);
 456
 457         return IRQ_HANDLED;
 458 }
 459
 460 static irqreturn_t enic_isr_msix_err(int irq, void *data)
 461 {
 462         struct enic *enic = data;
 463
 464         enic_log_q_error(enic);
 465
 466         /* schedule recovery from WQ/RQ error */
 467         schedule_work(&enic->reset);
 468
 469         return IRQ_HANDLED;
 470 }
 471
 472 static irqreturn_t enic_isr_msix_notify(int irq, void *data)
 473 {
 474         struct enic *enic = data;
 475
 476         enic_notify_check(enic);
 477         vnic_intr_unmask(&enic->intr[ENIC_MSIX_NOTIFY]);
 478
 479         return IRQ_HANDLED;
 480 }
 481
 482 static inline void enic_queue_wq_skb_cont(struct enic *enic,
 483         struct vnic_wq *wq, struct sk_buff *skb,
 484         unsigned int len_left)
 485 {
 486         skb_frag_t *frag;
 487
 488         /* Queue additional data fragments */
 489         for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
 490                 len_left -= frag->size;
 491                 enic_queue_wq_desc_cont(wq, skb,
 492                         pci_map_page(enic->pdev, frag->page,
 493                                 frag->page_offset, frag->size,
 494                                 PCI_DMA_TODEVICE),
 495                         frag->size,
 496                         (len_left == 0));       /* EOP? */
 497         }
 498 }
 499
 500 static inline void enic_queue_wq_skb_vlan(struct enic *enic,
 501         struct vnic_wq *wq, struct sk_buff *skb,
 502         int vlan_tag_insert, unsigned int vlan_tag)
 503 {
 504         unsigned int head_len = skb_headlen(skb);
 505         unsigned int len_left = skb->len - head_len;
 506         int eop = (len_left == 0);
 507
 508         /* Queue the main skb fragment */
 509         enic_queue_wq_desc(wq, skb,
 510                 pci_map_single(enic->pdev, skb->data,
 511                         head_len, PCI_DMA_TODEVICE),
 512                 head_len,
 513                 vlan_tag_insert, vlan_tag,
 514                 eop);
 515
 516         if (!eop)
 517                 enic_queue_wq_skb_cont(enic, wq, skb, len_left);
 518 }
 519
 520 static inline void enic_queue_wq_skb_csum_l4(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         unsigned int hdr_len = skb_transport_offset(skb);
 527         unsigned int csum_offset = hdr_len + skb->csum_offset;
 528         int eop = (len_left == 0);
 529
 530         /* Queue the main skb fragment */
 531         enic_queue_wq_desc_csum_l4(wq, skb,
 532                 pci_map_single(enic->pdev, skb->data,
 533                         head_len, PCI_DMA_TODEVICE),
 534                 head_len,
 535                 csum_offset,
 536                 hdr_len,
 537                 vlan_tag_insert, vlan_tag,
 538                 eop);
 539
 540         if (!eop)
 541                 enic_queue_wq_skb_cont(enic, wq, skb, len_left);
 542 }
 543
 544 static inline void enic_queue_wq_skb_tso(struct enic *enic,
 545         struct vnic_wq *wq, struct sk_buff *skb, unsigned int mss,
 546         int vlan_tag_insert, unsigned int vlan_tag)
 547 {
 548         unsigned int head_len = skb_headlen(skb);
 549         unsigned int len_left = skb->len - head_len;
 550         unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
 551         int eop = (len_left == 0);
 552
 553         /* Preload TCP csum field with IP pseudo hdr calculated
 554          * with IP length set to zero.  HW will later add in length
 555          * to each TCP segment resulting from the TSO.
 556          */
 557
 558         if (skb->protocol == __constant_htons(ETH_P_IP)) {
 559                 ip_hdr(skb)->check = 0;
 560                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr,
 561                         ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
 562         } else if (skb->protocol == __constant_htons(ETH_P_IPV6)) {
 563                 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
 564                         &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
 565         }
 566
 567         /* Queue the main skb fragment */
 568         enic_queue_wq_desc_tso(wq, skb,
 569                 pci_map_single(enic->pdev, skb->data,
 570                         head_len, PCI_DMA_TODEVICE),
 571                 head_len,
 572                 mss, hdr_len,
 573                 vlan_tag_insert, vlan_tag,
 574                 eop);
 575
 576         if (!eop)
 577                 enic_queue_wq_skb_cont(enic, wq, skb, len_left);
 578 }
 579
 580 static inline void enic_queue_wq_skb(struct enic *enic,
 581         struct vnic_wq *wq, struct sk_buff *skb)
 582 {
 583         unsigned int mss = skb_shinfo(skb)->gso_size;
 584         unsigned int vlan_tag = 0;
 585         int vlan_tag_insert = 0;
 586
 587         if (enic->vlan_group && vlan_tx_tag_present(skb)) {
 588                 /* VLAN tag from trunking driver */
 589                 vlan_tag_insert = 1;
 590                 vlan_tag = vlan_tx_tag_get(skb);
 591         }
 592
 593         if (mss)
 594                 enic_queue_wq_skb_tso(enic, wq, skb, mss,
 595                         vlan_tag_insert, vlan_tag);
 596         else if (skb->ip_summed == CHECKSUM_PARTIAL)
 597                 enic_queue_wq_skb_csum_l4(enic, wq, skb,
 598                         vlan_tag_insert, vlan_tag);
 599         else
 600                 enic_queue_wq_skb_vlan(enic, wq, skb,
 601                         vlan_tag_insert, vlan_tag);
 602 }
 603
 604 /* netif_tx_lock held, process context with BHs disabled */
 605 static int enic_hard_start_xmit(struct sk_buff *skb, struct net_device *netdev)
 606 {
 607         struct enic *enic = netdev_priv(netdev);
 608         struct vnic_wq *wq = &enic->wq[0];
 609         unsigned long flags;
 610
 611         if (skb->len <= 0) {
 612                 dev_kfree_skb(skb);
 613                 return NETDEV_TX_OK;
 614         }
 615
 616         /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs,
 617          * which is very likely.  In the off chance it's going to take
 618          * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb.
 619          */
 620
 621         if (skb_shinfo(skb)->gso_size == 0 &&
 622             skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC &&
 623             skb_linearize(skb)) {
 624                 dev_kfree_skb(skb);
 625                 return NETDEV_TX_OK;
 626         }
 627
 628         spin_lock_irqsave(&enic->wq_lock[0], flags);
 629
 630         if (vnic_wq_desc_avail(wq) < skb_shinfo(skb)->nr_frags + 1) {
 631                 netif_stop_queue(netdev);
 632                 /* This is a hard error, log it */
 633                 printk(KERN_ERR PFX "%s: BUG! Tx ring full when "
 634                         "queue awake!\n", netdev->name);
 635                 spin_unlock_irqrestore(&enic->wq_lock[0], flags);
 636                 return NETDEV_TX_BUSY;
 637         }
 638
 639         enic_queue_wq_skb(enic, wq, skb);
 640
 641         if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + 1)
 642                 netif_stop_queue(netdev);
 643
 644         netdev->trans_start = jiffies;
 645
 646         spin_unlock_irqrestore(&enic->wq_lock[0], flags);
 647
 648         return NETDEV_TX_OK;
 649 }
 650
 651 /* dev_base_lock rwlock held, nominally process context */
 652 static struct net_device_stats *enic_get_stats(struct net_device *netdev)
 653 {
 654         struct enic *enic = netdev_priv(netdev);
 655         struct vnic_stats *stats;
 656
 657         spin_lock(&enic->devcmd_lock);
 658         vnic_dev_stats_dump(enic->vdev, &stats);
 659         spin_unlock(&enic->devcmd_lock);
 660
 661         enic->net_stats.tx_packets = stats->tx.tx_frames_ok;
 662         enic->net_stats.tx_bytes = stats->tx.tx_bytes_ok;
 663         enic->net_stats.tx_errors = stats->tx.tx_errors;
 664         enic->net_stats.tx_dropped = stats->tx.tx_drops;
 665
 666         enic->net_stats.rx_packets = stats->rx.rx_frames_ok;
 667         enic->net_stats.rx_bytes = stats->rx.rx_bytes_ok;
 668         enic->net_stats.rx_errors = stats->rx.rx_errors;
 669         enic->net_stats.multicast = stats->rx.rx_multicast_frames_ok;
 670         enic->net_stats.rx_crc_errors = stats->rx.rx_crc_errors;
 671         enic->net_stats.rx_dropped = stats->rx.rx_no_bufs;
 672
 673         return &enic->net_stats;
 674 }
 675
 676 static void enic_reset_mcaddrs(struct enic *enic)
 677 {
 678         enic->mc_count = 0;
 679 }
 680
 681 static int enic_set_mac_addr(struct net_device *netdev, char *addr)
 682 {
 683         if (!is_valid_ether_addr(addr))
 684                 return -EADDRNOTAVAIL;
 685
 686         memcpy(netdev->dev_addr, addr, netdev->addr_len);
 687
 688         return 0;
 689 }
 690
 691 /* netif_tx_lock held, BHs disabled */
 692 static void enic_set_multicast_list(struct net_device *netdev)
 693 {
 694         struct enic *enic = netdev_priv(netdev);
 695         struct dev_mc_list *list = netdev->mc_list;
 696         int directed = 1;
 697         int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0;
 698         int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0;
 699         int promisc = (netdev->flags & IFF_PROMISC) ? 1 : 0;
 700         int allmulti = (netdev->flags & IFF_ALLMULTI) ||
 701             (netdev->mc_count > ENIC_MULTICAST_PERFECT_FILTERS);
 702         u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN];
 703         unsigned int mc_count = netdev->mc_count;
 704         unsigned int i, j;
 705
 706         if (mc_count > ENIC_MULTICAST_PERFECT_FILTERS)
 707                 mc_count = ENIC_MULTICAST_PERFECT_FILTERS;
 708
 709         spin_lock(&enic->devcmd_lock);
 710
 711         vnic_dev_packet_filter(enic->vdev, directed,
 712                 multicast, broadcast, promisc, allmulti);
 713
 714         /* Is there an easier way?  Trying to minimize to
 715          * calls to add/del multicast addrs.  We keep the
 716          * addrs from the last call in enic->mc_addr and
 717          * look for changes to add/del.
 718          */
 719
 720         for (i = 0; list && i < mc_count; i++) {
 721                 memcpy(mc_addr[i], list->dmi_addr, ETH_ALEN);
 722                 list = list->next;
 723         }
 724
 725         for (i = 0; i < enic->mc_count; i++) {
 726                 for (j = 0; j < mc_count; j++)
 727                         if (compare_ether_addr(enic->mc_addr[i],
 728                                 mc_addr[j]) == 0)
 729                                 break;
 730                 if (j == mc_count)
 731                         enic_del_multicast_addr(enic, enic->mc_addr[i]);
 732         }
 733
 734         for (i = 0; i < mc_count; i++) {
 735                 for (j = 0; j < enic->mc_count; j++)
 736                         if (compare_ether_addr(mc_addr[i],
 737                                 enic->mc_addr[j]) == 0)
 738                                 break;
 739                 if (j == enic->mc_count)
 740                         enic_add_multicast_addr(enic, mc_addr[i]);
 741         }
 742
 743         /* Save the list to compare against next time
 744          */
 745
 746         for (i = 0; i < mc_count; i++)
 747                 memcpy(enic->mc_addr[i], mc_addr[i], ETH_ALEN);
 748
 749         enic->mc_count = mc_count;
 750
 751         spin_unlock(&enic->devcmd_lock);
 752 }
 753
 754 /* rtnl lock is held */
 755 static void enic_vlan_rx_register(struct net_device *netdev,
 756         struct vlan_group *vlan_group)
 757 {
 758         struct enic *enic = netdev_priv(netdev);
 759         enic->vlan_group = vlan_group;
 760 }
 761
 762 /* rtnl lock is held */
 763 static void enic_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
 764 {
 765         struct enic *enic = netdev_priv(netdev);
 766
 767         spin_lock(&enic->devcmd_lock);
 768         enic_add_vlan(enic, vid);
 769         spin_unlock(&enic->devcmd_lock);
 770 }
 771
 772 /* rtnl lock is held */
 773 static void enic_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
 774 {
 775         struct enic *enic = netdev_priv(netdev);
 776
 777         spin_lock(&enic->devcmd_lock);
 778         enic_del_vlan(enic, vid);
 779         spin_unlock(&enic->devcmd_lock);
 780 }
 781
 782 /* netif_tx_lock held, BHs disabled */
 783 static void enic_tx_timeout(struct net_device *netdev)
 784 {
 785         struct enic *enic = netdev_priv(netdev);
 786         schedule_work(&enic->reset);
 787 }
 788
 789 static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
 790 {
 791         struct enic *enic = vnic_dev_priv(rq->vdev);
 792
 793         if (!buf->os_buf)
 794                 return;
 795
 796         pci_unmap_single(enic->pdev, buf->dma_addr,
 797                 buf->len, PCI_DMA_FROMDEVICE);
 798         dev_kfree_skb_any(buf->os_buf);
 799 }
 800
 801 static inline struct sk_buff *enic_rq_alloc_skb(unsigned int size)
 802 {
 803         struct sk_buff *skb;
 804
 805         skb = dev_alloc_skb(size + NET_IP_ALIGN);
 806
 807         if (skb)
 808                 skb_reserve(skb, NET_IP_ALIGN);
 809
 810         return skb;
 811 }
 812
 813 static int enic_rq_alloc_buf(struct vnic_rq *rq)
 814 {
 815         struct enic *enic = vnic_dev_priv(rq->vdev);
 816         struct sk_buff *skb;
 817         unsigned int len = enic->netdev->mtu + ETH_HLEN;
 818         unsigned int os_buf_index = 0;
 819         dma_addr_t dma_addr;
 820
 821         skb = enic_rq_alloc_skb(len);
 822         if (!skb)
 823                 return -ENOMEM;
 824
 825         dma_addr = pci_map_single(enic->pdev, skb->data,
 826                 len, PCI_DMA_FROMDEVICE);
 827
 828         enic_queue_rq_desc(rq, skb, os_buf_index,
 829                 dma_addr, len);
 830
 831         return 0;
 832 }
 833
 834 static int enic_get_skb_header(struct sk_buff *skb, void **iphdr,
 835         void **tcph, u64 *hdr_flags, void *priv)
 836 {
 837         struct cq_enet_rq_desc *cq_desc = priv;
 838         unsigned int ip_len;
 839         struct iphdr *iph;
 840
 841         u8 type, color, eop, sop, ingress_port, vlan_stripped;
 842         u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
 843         u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
 844         u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
 845         u8 packet_error;
 846         u16 q_number, completed_index, bytes_written, vlan, checksum;
 847         u32 rss_hash;
 848
 849         cq_enet_rq_desc_dec(cq_desc,
 850                 &type, &color, &q_number, &completed_index,
 851                 &ingress_port, &fcoe, &eop, &sop, &rss_type,
 852                 &csum_not_calc, &rss_hash, &bytes_written,
 853                 &packet_error, &vlan_stripped, &vlan, &checksum,
 854                 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
 855                 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
 856                 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
 857                 &fcs_ok);
 858
 859         if (!(ipv4 && tcp && !ipv4_fragment))
 860                 return -1;
 861
 862         skb_reset_network_header(skb);
 863         iph = ip_hdr(skb);
 864
 865         ip_len = ip_hdrlen(skb);
 866         skb_set_transport_header(skb, ip_len);
 867
 868         /* check if ip header and tcp header are complete */
 869         if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb))
 870                 return -1;
 871
 872         *hdr_flags = LRO_IPV4 | LRO_TCP;
 873         *tcph = tcp_hdr(skb);
 874         *iphdr = iph;
 875
 876         return 0;
 877 }
 878
 879 static void enic_rq_indicate_buf(struct vnic_rq *rq,
 880         struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
 881         int skipped, void *opaque)
 882 {
 883         struct enic *enic = vnic_dev_priv(rq->vdev);
 884         struct sk_buff *skb;
 885
 886         u8 type, color, eop, sop, ingress_port, vlan_stripped;
 887         u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
 888         u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
 889         u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
 890         u8 packet_error;
 891         u16 q_number, completed_index, bytes_written, vlan, checksum;
 892         u32 rss_hash;
 893
 894         if (skipped)
 895                 return;
 896
 897         skb = buf->os_buf;
 898         prefetch(skb->data - NET_IP_ALIGN);
 899         pci_unmap_single(enic->pdev, buf->dma_addr,
 900                 buf->len, PCI_DMA_FROMDEVICE);
 901
 902         cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
 903                 &type, &color, &q_number, &completed_index,
 904                 &ingress_port, &fcoe, &eop, &sop, &rss_type,
 905                 &csum_not_calc, &rss_hash, &bytes_written,
 906                 &packet_error, &vlan_stripped, &vlan, &checksum,
 907                 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
 908                 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
 909                 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
 910                 &fcs_ok);
 911
 912         if (packet_error) {
 913
 914                 if (bytes_written > 0 && !fcs_ok) {
 915                         if (net_ratelimit())
 916                                 printk(KERN_ERR PFX
 917                                         "%s: packet error: bad FCS\n",
 918                                         enic->netdev->name);
 919                 }
 920
 921                 dev_kfree_skb_any(skb);
 922
 923                 return;
 924         }
 925
 926         if (eop && bytes_written > 0) {
 927
 928                 /* Good receive
 929                  */
 930
 931                 skb_put(skb, bytes_written);
 932                 skb->protocol = eth_type_trans(skb, enic->netdev);
 933
 934                 if (enic->csum_rx_enabled && !csum_not_calc) {
 935                         skb->csum = htons(checksum);
 936                         skb->ip_summed = CHECKSUM_COMPLETE;
 937                 }
 938
 939                 skb->dev = enic->netdev;
 940                 enic->netdev->last_rx = jiffies;
 941
 942                 if (enic->vlan_group && vlan_stripped) {
 943
 944                         if (ENIC_SETTING(enic, LRO))
 945                                 lro_vlan_hwaccel_receive_skb(&enic->lro_mgr,
 946                                         skb, enic->vlan_group,
 947                                         vlan, cq_desc);
 948                         else
 949                                 vlan_hwaccel_receive_skb(skb,
 950                                         enic->vlan_group, vlan);
 951
 952                 } else {
 953
 954                         if (ENIC_SETTING(enic, LRO))
 955                                 lro_receive_skb(&enic->lro_mgr, skb, cq_desc);
 956                         else
 957                                 netif_receive_skb(skb);
 958
 959                 }
 960
 961         } else {
 962
 963                 /* Buffer overflow
 964                  */
 965
 966                 dev_kfree_skb_any(skb);
 967         }
 968 }
 969
 970 static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
 971         u8 type, u16 q_number, u16 completed_index, void *opaque)
 972 {
 973         struct enic *enic = vnic_dev_priv(vdev);
 974
 975         vnic_rq_service(&enic->rq[q_number], cq_desc,
 976                 completed_index, VNIC_RQ_RETURN_DESC,
 977                 enic_rq_indicate_buf, opaque);
 978
 979         return 0;
 980 }
 981
 982 static void enic_rq_drop_buf(struct vnic_rq *rq,
 983         struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
 984         int skipped, void *opaque)
 985 {
 986         struct enic *enic = vnic_dev_priv(rq->vdev);
 987         struct sk_buff *skb = buf->os_buf;
 988
 989         if (skipped)
 990                 return;
 991
 992         pci_unmap_single(enic->pdev, buf->dma_addr,
 993                 buf->len, PCI_DMA_FROMDEVICE);
 994
 995         dev_kfree_skb_any(skb);
 996 }
 997
 998 static int enic_rq_service_drop(struct vnic_dev *vdev, struct cq_desc *cq_desc,
 999         u8 type, u16 q_number, u16 completed_index, void *opaque)
1000 {
1001         struct enic *enic = vnic_dev_priv(vdev);
1002
1003         vnic_rq_service(&enic->rq[q_number], cq_desc,
1004                 completed_index, VNIC_RQ_RETURN_DESC,
1005                 enic_rq_drop_buf, opaque);
1006
1007         return 0;
1008 }
1009
1010 static int enic_poll(struct napi_struct *napi, int budget)
1011 {
1012         struct enic *enic = container_of(napi, struct enic, napi);
1013         struct net_device *netdev = enic->netdev;
1014         unsigned int rq_work_to_do = budget;
1015         unsigned int wq_work_to_do = -1; /* no limit */
1016         unsigned int  work_done, rq_work_done, wq_work_done;
1017
1018         /* Service RQ (first) and WQ
1019          */
1020
1021         rq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_RQ],
1022                 rq_work_to_do, enic_rq_service, NULL);
1023
1024         wq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_WQ],
1025                 wq_work_to_do, enic_wq_service, NULL);
1026
1027         /* Accumulate intr event credits for this polling
1028          * cycle.  An intr event is the completion of a
1029          * a WQ or RQ packet.
1030          */
1031
1032         work_done = rq_work_done + wq_work_done;
1033
1034         if (work_done > 0)
1035                 vnic_intr_return_credits(&enic->intr[ENIC_INTX_WQ_RQ],
1036                         work_done,
1037                         0 /* don't unmask intr */,
1038                         0 /* don't reset intr timer */);
1039
1040         if (rq_work_done > 0) {
1041
1042                 /* Replenish RQ
1043                  */
1044
1045                 vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1046
1047         } else {
1048
1049                 /* If no work done, flush all LROs and exit polling
1050                  */
1051
1052                 if (ENIC_SETTING(enic, LRO))
1053                         lro_flush_all(&enic->lro_mgr);
1054
1055                 netif_rx_complete(netdev, napi);
1056                 vnic_intr_unmask(&enic->intr[ENIC_MSIX_RQ]);
1057         }
1058
1059         return rq_work_done;
1060 }
1061
1062 static int enic_poll_msix(struct napi_struct *napi, int budget)
1063 {
1064         struct enic *enic = container_of(napi, struct enic, napi);
1065         struct net_device *netdev = enic->netdev;
1066         unsigned int work_to_do = budget;
1067         unsigned int work_done;
1068
1069         /* Service RQ
1070          */
1071
1072         work_done = vnic_cq_service(&enic->cq[ENIC_CQ_RQ],
1073                 work_to_do, enic_rq_service, NULL);
1074
1075         if (work_done > 0) {
1076
1077                 /* Replenish RQ
1078                  */
1079
1080                 vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1081
1082                 /* Accumulate intr event credits for this polling
1083                  * cycle.  An intr event is the completion of a
1084                  * a WQ or RQ packet.
1085                  */
1086
1087                 vnic_intr_return_credits(&enic->intr[ENIC_MSIX_RQ],
1088                         work_done,
1089                         0 /* don't unmask intr */,
1090                         0 /* don't reset intr timer */);
1091         } else {
1092
1093                 /* If no work done, flush all LROs and exit polling
1094                  */
1095
1096                 if (ENIC_SETTING(enic, LRO))
1097                         lro_flush_all(&enic->lro_mgr);
1098
1099                 netif_rx_complete(netdev, napi);
1100                 vnic_intr_unmask(&enic->intr[ENIC_MSIX_RQ]);
1101         }
1102
1103         return work_done;
1104 }
1105
1106 static void enic_notify_timer(unsigned long data)
1107 {
1108         struct enic *enic = (struct enic *)data;
1109
1110         enic_notify_check(enic);
1111
1112         mod_timer(&enic->notify_timer, round_jiffies(ENIC_NOTIFY_TIMER_PERIOD));
1113 }
1114
1115 static void enic_free_intr(struct enic *enic)
1116 {
1117         struct net_device *netdev = enic->netdev;
1118         unsigned int i;
1119
1120         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1121         case VNIC_DEV_INTR_MODE_INTX:
1122         case VNIC_DEV_INTR_MODE_MSI:
1123                 free_irq(enic->pdev->irq, netdev);
1124                 break;
1125         case VNIC_DEV_INTR_MODE_MSIX:
1126                 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1127                         if (enic->msix[i].requested)
1128                                 free_irq(enic->msix_entry[i].vector,
1129                                         enic->msix[i].devid);
1130                 break;
1131         default:
1132                 break;
1133         }
1134 }
1135
1136 static int enic_request_intr(struct enic *enic)
1137 {
1138         struct net_device *netdev = enic->netdev;
1139         unsigned int i;
1140         int err = 0;
1141
1142         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1143
1144         case VNIC_DEV_INTR_MODE_INTX:
1145
1146                 err = request_irq(enic->pdev->irq, enic_isr_legacy,
1147                         IRQF_SHARED, netdev->name, netdev);
1148                 break;
1149
1150         case VNIC_DEV_INTR_MODE_MSI:
1151
1152                 err = request_irq(enic->pdev->irq, enic_isr_msi,
1153                         0, netdev->name, enic);
1154                 break;
1155
1156         case VNIC_DEV_INTR_MODE_MSIX:
1157
1158                 sprintf(enic->msix[ENIC_MSIX_RQ].devname,
1159                         "%.11s-rx", netdev->name);
1160                 enic->msix[ENIC_MSIX_RQ].isr = enic_isr_msix_rq;
1161                 enic->msix[ENIC_MSIX_RQ].devid = enic;
1162
1163                 sprintf(enic->msix[ENIC_MSIX_WQ].devname,
1164                         "%.11s-tx", netdev->name);
1165                 enic->msix[ENIC_MSIX_WQ].isr = enic_isr_msix_wq;
1166                 enic->msix[ENIC_MSIX_WQ].devid = enic;
1167
1168                 sprintf(enic->msix[ENIC_MSIX_ERR].devname,
1169                         "%.11s-err", netdev->name);
1170                 enic->msix[ENIC_MSIX_ERR].isr = enic_isr_msix_err;
1171                 enic->msix[ENIC_MSIX_ERR].devid = enic;
1172
1173                 sprintf(enic->msix[ENIC_MSIX_NOTIFY].devname,
1174                         "%.11s-notify", netdev->name);
1175                 enic->msix[ENIC_MSIX_NOTIFY].isr = enic_isr_msix_notify;
1176                 enic->msix[ENIC_MSIX_NOTIFY].devid = enic;
1177
1178                 for (i = 0; i < ARRAY_SIZE(enic->msix); i++) {
1179                         err = request_irq(enic->msix_entry[i].vector,
1180                                 enic->msix[i].isr, 0,
1181                                 enic->msix[i].devname,
1182                                 enic->msix[i].devid);
1183                         if (err) {
1184                                 enic_free_intr(enic);
1185                                 break;
1186                         }
1187                         enic->msix[i].requested = 1;
1188                 }
1189
1190                 break;
1191
1192         default:
1193                 break;
1194         }
1195
1196         return err;
1197 }
1198
1199 static int enic_notify_set(struct enic *enic)
1200 {
1201         int err;
1202
1203         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1204         case VNIC_DEV_INTR_MODE_INTX:
1205                 err = vnic_dev_notify_set(enic->vdev, ENIC_INTX_NOTIFY);
1206                 break;
1207         case VNIC_DEV_INTR_MODE_MSIX:
1208                 err = vnic_dev_notify_set(enic->vdev, ENIC_MSIX_NOTIFY);
1209                 break;
1210         default:
1211                 err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */);
1212                 break;
1213         }
1214
1215         return err;
1216 }
1217
1218 static void enic_notify_timer_start(struct enic *enic)
1219 {
1220         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1221         case VNIC_DEV_INTR_MODE_MSI:
1222                 mod_timer(&enic->notify_timer, jiffies);
1223                 break;
1224         default:
1225                 /* Using intr for notification for INTx/MSI-X */
1226                 break;
1227         };
1228 }
1229
1230 /* rtnl lock is held, process context */
1231 static int enic_open(struct net_device *netdev)
1232 {
1233         struct enic *enic = netdev_priv(netdev);
1234         unsigned int i;
1235         int err;
1236
1237         for (i = 0; i < enic->rq_count; i++) {
1238                 err = vnic_rq_fill(&enic->rq[i], enic_rq_alloc_buf);
1239                 if (err) {
1240                         printk(KERN_ERR PFX
1241                                 "%s: Unable to alloc receive buffers.\n",
1242                                 netdev->name);
1243                         return err;
1244                 }
1245         }
1246
1247         for (i = 0; i < enic->wq_count; i++)
1248                 vnic_wq_enable(&enic->wq[i]);
1249         for (i = 0; i < enic->rq_count; i++)
1250                 vnic_rq_enable(&enic->rq[i]);
1251
1252         enic_add_station_addr(enic);
1253         enic_set_multicast_list(netdev);
1254
1255         netif_wake_queue(netdev);
1256         napi_enable(&enic->napi);
1257         vnic_dev_enable(enic->vdev);
1258
1259         for (i = 0; i < enic->intr_count; i++)
1260                 vnic_intr_unmask(&enic->intr[i]);
1261
1262         enic_notify_timer_start(enic);
1263
1264         return 0;
1265 }
1266
1267 /* rtnl lock is held, process context */
1268 static int enic_stop(struct net_device *netdev)
1269 {
1270         struct enic *enic = netdev_priv(netdev);
1271         unsigned int i;
1272         int err;
1273
1274         del_timer_sync(&enic->notify_timer);
1275
1276         vnic_dev_disable(enic->vdev);
1277         napi_disable(&enic->napi);
1278         netif_stop_queue(netdev);
1279
1280         for (i = 0; i < enic->intr_count; i++)
1281                 vnic_intr_mask(&enic->intr[i]);
1282
1283         for (i = 0; i < enic->wq_count; i++) {
1284                 err = vnic_wq_disable(&enic->wq[i]);
1285                 if (err)
1286                         return err;
1287         }
1288         for (i = 0; i < enic->rq_count; i++) {
1289                 err = vnic_rq_disable(&enic->rq[i]);
1290                 if (err)
1291                         return err;
1292         }
1293
1294         (void)vnic_cq_service(&enic->cq[ENIC_CQ_RQ],
1295                 -1, enic_rq_service_drop, NULL);
1296         (void)vnic_cq_service(&enic->cq[ENIC_CQ_WQ],
1297                 -1, enic_wq_service, NULL);
1298
1299         for (i = 0; i < enic->wq_count; i++)
1300                 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
1301         for (i = 0; i < enic->rq_count; i++)
1302                 vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
1303         for (i = 0; i < enic->cq_count; i++)
1304                 vnic_cq_clean(&enic->cq[i]);
1305         for (i = 0; i < enic->intr_count; i++)
1306                 vnic_intr_clean(&enic->intr[i]);
1307
1308         return 0;
1309 }
1310
1311 static int enic_change_mtu(struct net_device *netdev, int new_mtu)
1312 {
1313         struct enic *enic = netdev_priv(netdev);
1314         int running = netif_running(netdev);
1315
1316         if (running)
1317                 enic_stop(netdev);
1318
1319         if (new_mtu < ENIC_MIN_MTU)
1320                 new_mtu = ENIC_MIN_MTU;
1321         if (new_mtu > ENIC_MAX_MTU)
1322                 new_mtu = ENIC_MAX_MTU;
1323
1324         netdev->mtu = new_mtu;
1325
1326         if (netdev->mtu > enic->port_mtu)
1327                 printk(KERN_WARNING PFX
1328                         "%s: interface MTU (%d) set higher "
1329                         "than port MTU (%d)\n",
1330                         netdev->name, netdev->mtu, enic->port_mtu);
1331
1332         if (running)
1333                 enic_open(netdev);
1334
1335         return 0;
1336 }
1337
1338 #ifdef CONFIG_NET_POLL_CONTROLLER
1339 static void enic_poll_controller(struct net_device *netdev)
1340 {
1341         struct enic *enic = netdev_priv(netdev);
1342         struct vnic_dev *vdev = enic->vdev;
1343
1344         switch (vnic_dev_get_intr_mode(vdev)) {
1345         case VNIC_DEV_INTR_MODE_MSIX:
1346                 enic_isr_msix_rq(enic->pdev->irq, enic);
1347                 enic_isr_msix_wq(enic->pdev->irq, enic);
1348                 break;
1349         case VNIC_DEV_INTR_MODE_MSI:
1350                 enic_isr_msi(enic->pdev->irq, enic);
1351                 break;
1352         case VNIC_DEV_INTR_MODE_INTX:
1353                 enic_isr_legacy(enic->pdev->irq, netdev);
1354                 break;
1355         default:
1356                 break;
1357         }
1358 }
1359 #endif
1360
1361 static int enic_dev_wait(struct vnic_dev *vdev,
1362         int (*start)(struct vnic_dev *, int),
1363         int (*finished)(struct vnic_dev *, int *),
1364         int arg)
1365 {
1366         unsigned long time;
1367         int done;
1368         int err;
1369
1370         BUG_ON(in_interrupt());
1371
1372         err = start(vdev, arg);
1373         if (err)
1374                 return err;
1375
1376         /* Wait for func to complete...2 seconds max
1377          */
1378
1379         time = jiffies + (HZ * 2);
1380         do {
1381
1382                 err = finished(vdev, &done);
1383                 if (err)
1384                         return err;
1385
1386                 if (done)
1387                         return 0;
1388
1389                 schedule_timeout_uninterruptible(HZ / 10);
1390
1391         } while (time_after(time, jiffies));
1392
1393         return -ETIMEDOUT;
1394 }
1395
1396 static int enic_dev_open(struct enic *enic)
1397 {
1398         int err;
1399
1400         err = enic_dev_wait(enic->vdev, vnic_dev_open,
1401                 vnic_dev_open_done, 0);
1402         if (err)
1403                 printk(KERN_ERR PFX
1404                         "vNIC device open failed, err %d.\n", err);
1405
1406         return err;
1407 }
1408
1409 static int enic_dev_soft_reset(struct enic *enic)
1410 {
1411         int err;
1412
1413         err = enic_dev_wait(enic->vdev, vnic_dev_soft_reset,
1414                 vnic_dev_soft_reset_done, 0);
1415         if (err)
1416                 printk(KERN_ERR PFX
1417                         "vNIC soft reset failed, err %d.\n", err);
1418
1419         return err;
1420 }
1421
1422 static void enic_reset(struct work_struct *work)
1423 {
1424         struct enic *enic = container_of(work, struct enic, reset);
1425
1426         if (!netif_running(enic->netdev))
1427                 return;
1428
1429         rtnl_lock();
1430
1431         spin_lock(&enic->devcmd_lock);
1432         vnic_dev_hang_notify(enic->vdev);
1433         spin_unlock(&enic->devcmd_lock);
1434
1435         enic_stop(enic->netdev);
1436         enic_dev_soft_reset(enic);
1437         enic_reset_mcaddrs(enic);
1438         enic_init_vnic_resources(enic);
1439         enic_open(enic->netdev);
1440
1441         rtnl_unlock();
1442 }
1443
1444 static int enic_set_intr_mode(struct enic *enic)
1445 {
1446         unsigned int n = ARRAY_SIZE(enic->rq);
1447         unsigned int m = ARRAY_SIZE(enic->wq);
1448         unsigned int i;
1449
1450         /* Set interrupt mode (INTx, MSI, MSI-X) depending
1451          * system capabilities.
1452          *
1453          * Try MSI-X first
1454          *
1455          * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs
1456          * (the second to last INTR is used for WQ/RQ errors)
1457          * (the last INTR is used for notifications)
1458          */
1459
1460         BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2);
1461         for (i = 0; i < n + m + 2; i++)
1462                 enic->msix_entry[i].entry = i;
1463
1464         if (enic->config.intr_mode < 1 &&
1465             enic->rq_count >= n &&
1466             enic->wq_count >= m &&
1467             enic->cq_count >= n + m &&
1468             enic->intr_count >= n + m + 2 &&
1469             !pci_enable_msix(enic->pdev, enic->msix_entry, n + m + 2)) {
1470
1471                 enic->rq_count = n;
1472                 enic->wq_count = m;
1473                 enic->cq_count = n + m;
1474                 enic->intr_count = n + m + 2;
1475
1476                 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSIX);
1477
1478                 return 0;
1479         }
1480
1481         /* Next try MSI
1482          *
1483          * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR
1484          */
1485
1486         if (enic->config.intr_mode < 2 &&
1487             enic->rq_count >= 1 &&
1488             enic->wq_count >= 1 &&
1489             enic->cq_count >= 2 &&
1490             enic->intr_count >= 1 &&
1491             !pci_enable_msi(enic->pdev)) {
1492
1493                 enic->rq_count = 1;
1494                 enic->wq_count = 1;
1495                 enic->cq_count = 2;
1496                 enic->intr_count = 1;
1497
1498                 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI);
1499
1500                 return 0;
1501         }
1502
1503         /* Next try INTx
1504          *
1505          * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs
1506          * (the first INTR is used for WQ/RQ)
1507          * (the second INTR is used for WQ/RQ errors)
1508          * (the last INTR is used for notifications)
1509          */
1510
1511         if (enic->config.intr_mode < 3 &&
1512             enic->rq_count >= 1 &&
1513             enic->wq_count >= 1 &&
1514             enic->cq_count >= 2 &&
1515             enic->intr_count >= 3) {
1516
1517                 enic->rq_count = 1;
1518                 enic->wq_count = 1;
1519                 enic->cq_count = 2;
1520                 enic->intr_count = 3;
1521
1522                 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX);
1523
1524                 return 0;
1525         }
1526
1527         vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
1528
1529         return -EINVAL;
1530 }
1531
1532 static void enic_clear_intr_mode(struct enic *enic)
1533 {
1534         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1535         case VNIC_DEV_INTR_MODE_MSIX:
1536                 pci_disable_msix(enic->pdev);
1537                 break;
1538         case VNIC_DEV_INTR_MODE_MSI:
1539                 pci_disable_msi(enic->pdev);
1540                 break;
1541         default:
1542                 break;
1543         }
1544
1545         vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
1546 }
1547
1548 static void enic_iounmap(struct enic *enic)
1549 {
1550         if (enic->bar0.vaddr)
1551                 iounmap(enic->bar0.vaddr);
1552 }
1553
1554 static int __devinit enic_probe(struct pci_dev *pdev,
1555         const struct pci_device_id *ent)
1556 {
1557         struct net_device *netdev;
1558         struct enic *enic;
1559         int using_dac = 0;
1560         unsigned int i;
1561         int err;
1562
1563         const u8 rss_default_cpu = 0;
1564         const u8 rss_hash_type = 0;
1565         const u8 rss_hash_bits = 0;
1566         const u8 rss_base_cpu = 0;
1567         const u8 rss_enable = 0;
1568         const u8 tso_ipid_split_en = 0;
1569         const u8 ig_vlan_strip_en = 1;
1570
1571         /* Allocate net device structure and initialize.  Private
1572          * instance data is initialized to zero.
1573          */
1574
1575         netdev = alloc_etherdev(sizeof(struct enic));
1576         if (!netdev) {
1577                 printk(KERN_ERR PFX "Etherdev alloc failed, aborting.\n");
1578                 return -ENOMEM;
1579         }
1580
1581         /* Set the netdev name early so intr vectors are properly
1582          * named and any error msgs can include netdev->name
1583          */
1584
1585         rtnl_lock();
1586         err = dev_alloc_name(netdev, netdev->name);
1587         rtnl_unlock();
1588         if (err < 0) {
1589                 printk(KERN_ERR PFX "Unable to allocate netdev name.\n");
1590                 goto err_out_free_netdev;
1591         }
1592
1593         pci_set_drvdata(pdev, netdev);
1594
1595         SET_NETDEV_DEV(netdev, &pdev->dev);
1596
1597         enic = netdev_priv(netdev);
1598         enic->netdev = netdev;
1599         enic->pdev = pdev;
1600
1601         /* Setup PCI resources
1602          */
1603
1604         err = pci_enable_device(pdev);
1605         if (err) {
1606                 printk(KERN_ERR PFX
1607                         "%s: Cannot enable PCI device, aborting.\n",
1608                         netdev->name);
1609                 goto err_out_free_netdev;
1610         }
1611
1612         err = pci_request_regions(pdev, DRV_NAME);
1613         if (err) {
1614                 printk(KERN_ERR PFX
1615                         "%s: Cannot request PCI regions, aborting.\n",
1616                         netdev->name);
1617                 goto err_out_disable_device;
1618         }
1619
1620         pci_set_master(pdev);
1621
1622         /* Query PCI controller on system for DMA addressing
1623          * limitation for the device.  Try 40-bit first, and
1624          * fail to 32-bit.
1625          */
1626
1627         err = pci_set_dma_mask(pdev, DMA_40BIT_MASK);
1628         if (err) {
1629                 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
1630                 if (err) {
1631                         printk(KERN_ERR PFX
1632                                 "%s: No usable DMA configuration, aborting.\n",
1633                                 netdev->name);
1634                         goto err_out_release_regions;
1635                 }
1636                 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
1637                 if (err) {
1638                         printk(KERN_ERR PFX
1639                                 "%s: Unable to obtain 32-bit DMA "
1640                                 "for consistent allocations, aborting.\n",
1641                                 netdev->name);
1642                         goto err_out_release_regions;
1643                 }
1644         } else {
1645                 err = pci_set_consistent_dma_mask(pdev, DMA_40BIT_MASK);
1646                 if (err) {
1647                         printk(KERN_ERR PFX
1648                                 "%s: Unable to obtain 40-bit DMA "
1649                                 "for consistent allocations, aborting.\n",
1650                                 netdev->name);
1651                         goto err_out_release_regions;
1652                 }
1653                 using_dac = 1;
1654         }
1655
1656         /* Map vNIC resources from BAR0
1657          */
1658
1659         if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
1660                 printk(KERN_ERR PFX
1661                         "%s: BAR0 not memory-map'able, aborting.\n",
1662                         netdev->name);
1663                 err = -ENODEV;
1664                 goto err_out_release_regions;
1665         }
1666
1667         enic->bar0.vaddr = pci_iomap(pdev, 0, enic->bar0.len);
1668         enic->bar0.bus_addr = pci_resource_start(pdev, 0);
1669         enic->bar0.len = pci_resource_len(pdev, 0);
1670
1671         if (!enic->bar0.vaddr) {
1672                 printk(KERN_ERR PFX
1673                         "%s: Cannot memory-map BAR0 res hdr, aborting.\n",
1674                         netdev->name);
1675                 err = -ENODEV;
1676                 goto err_out_release_regions;
1677         }
1678
1679         /* Register vNIC device
1680          */
1681
1682         enic->vdev = vnic_dev_register(NULL, enic, pdev, &enic->bar0);
1683         if (!enic->vdev) {
1684                 printk(KERN_ERR PFX
1685                         "%s: vNIC registration failed, aborting.\n",
1686                         netdev->name);
1687                 err = -ENODEV;
1688                 goto err_out_iounmap;
1689         }
1690
1691         /* Issue device open to get device in known state
1692          */
1693
1694         err = enic_dev_open(enic);
1695         if (err) {
1696                 printk(KERN_ERR PFX
1697                         "%s: vNIC dev open failed, aborting.\n",
1698                         netdev->name);
1699                 goto err_out_vnic_unregister;
1700         }
1701
1702         /* Issue device init to initialize the vnic-to-switch link.
1703          * We'll start with carrier off and wait for link UP
1704          * notification later to turn on carrier.  We don't need
1705          * to wait here for the vnic-to-switch link initialization
1706          * to complete; link UP notification is the indication that
1707          * the process is complete.
1708          */
1709
1710         netif_carrier_off(netdev);
1711
1712         err = vnic_dev_init(enic->vdev, 0);
1713         if (err) {
1714                 printk(KERN_ERR PFX
1715                         "%s: vNIC dev init failed, aborting.\n",
1716                         netdev->name);
1717                 goto err_out_dev_close;
1718         }
1719
1720         /* Get vNIC configuration
1721          */
1722
1723         err = enic_get_vnic_config(enic);
1724         if (err) {
1725                 printk(KERN_ERR PFX
1726                         "%s: Get vNIC configuration failed, aborting.\n",
1727                         netdev->name);
1728                 goto err_out_dev_close;
1729         }
1730
1731         /* Get available resource counts
1732         */
1733
1734         enic_get_res_counts(enic);
1735
1736         /* Set interrupt mode based on resource counts and system
1737          * capabilities
1738         */
1739
1740         err = enic_set_intr_mode(enic);
1741         if (err) {
1742                 printk(KERN_ERR PFX
1743                         "%s: Failed to set intr mode, aborting.\n",
1744                         netdev->name);
1745                 goto err_out_dev_close;
1746         }
1747
1748         /* Request interrupt vector(s)
1749         */
1750
1751         err = enic_request_intr(enic);
1752         if (err) {
1753                 printk(KERN_ERR PFX "%s: Unable to request irq.\n",
1754                         netdev->name);
1755                 goto err_out_dev_close;
1756         }
1757
1758         /* Allocate and configure vNIC resources
1759          */
1760
1761         err = enic_alloc_vnic_resources(enic);
1762         if (err) {
1763                 printk(KERN_ERR PFX
1764                         "%s: Failed to alloc vNIC resources, aborting.\n",
1765                         netdev->name);
1766                 goto err_out_free_vnic_resources;
1767         }
1768
1769         enic_init_vnic_resources(enic);
1770
1771         /* Enable VLAN tag stripping.  RSS not enabled (yet).
1772          */
1773
1774         err = enic_set_nic_cfg(enic,
1775                 rss_default_cpu, rss_hash_type,
1776                 rss_hash_bits, rss_base_cpu,
1777                 rss_enable, tso_ipid_split_en,
1778                 ig_vlan_strip_en);
1779         if (err) {
1780                 printk(KERN_ERR PFX
1781                         "%s: Failed to config nic, aborting.\n",
1782                         netdev->name);
1783                 goto err_out_free_vnic_resources;
1784         }
1785
1786         /* Setup notification buffer area
1787          */
1788
1789         err = enic_notify_set(enic);
1790         if (err) {
1791                 printk(KERN_ERR PFX
1792                         "%s: Failed to alloc notify buffer, aborting.\n",
1793                         netdev->name);
1794                 goto err_out_free_vnic_resources;
1795         }
1796
1797         /* Setup notification timer, HW reset task, and locks
1798          */
1799
1800         init_timer(&enic->notify_timer);
1801         enic->notify_timer.function = enic_notify_timer;
1802         enic->notify_timer.data = (unsigned long)enic;
1803
1804         INIT_WORK(&enic->reset, enic_reset);
1805
1806         for (i = 0; i < enic->wq_count; i++)
1807                 spin_lock_init(&enic->wq_lock[i]);
1808
1809         spin_lock_init(&enic->devcmd_lock);
1810
1811         /* Register net device
1812          */
1813
1814         enic->port_mtu = enic->config.mtu;
1815         (void)enic_change_mtu(netdev, enic->port_mtu);
1816
1817         err = enic_set_mac_addr(netdev, enic->mac_addr);
1818         if (err) {
1819                 printk(KERN_ERR PFX
1820                         "%s: Invalid MAC address, aborting.\n",
1821                         netdev->name);
1822                 goto err_out_notify_unset;
1823         }
1824
1825         netdev->open = enic_open;
1826         netdev->stop = enic_stop;
1827         netdev->hard_start_xmit = enic_hard_start_xmit;
1828         netdev->get_stats = enic_get_stats;
1829         netdev->set_multicast_list = enic_set_multicast_list;
1830         netdev->change_mtu = enic_change_mtu;
1831         netdev->vlan_rx_register = enic_vlan_rx_register;
1832         netdev->vlan_rx_add_vid = enic_vlan_rx_add_vid;
1833         netdev->vlan_rx_kill_vid = enic_vlan_rx_kill_vid;
1834         netdev->tx_timeout = enic_tx_timeout;
1835         netdev->watchdog_timeo = 2 * HZ;
1836         netdev->ethtool_ops = &enic_ethtool_ops;
1837 #ifdef CONFIG_NET_POLL_CONTROLLER
1838         netdev->poll_controller = enic_poll_controller;
1839 #endif
1840
1841         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1842         default:
1843                 netif_napi_add(netdev, &enic->napi, enic_poll, 64);
1844                 break;
1845         case VNIC_DEV_INTR_MODE_MSIX:
1846                 netif_napi_add(netdev, &enic->napi, enic_poll_msix, 64);
1847                 break;
1848         }
1849
1850         netdev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
1851         if (ENIC_SETTING(enic, TXCSUM))
1852                 netdev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
1853         if (ENIC_SETTING(enic, TSO))
1854                 netdev->features |= NETIF_F_TSO |
1855                         NETIF_F_TSO6 | NETIF_F_TSO_ECN;
1856         if (using_dac)
1857                 netdev->features |= NETIF_F_HIGHDMA;
1858
1859
1860         enic->csum_rx_enabled = ENIC_SETTING(enic, RXCSUM);
1861
1862         if (ENIC_SETTING(enic, LRO)) {
1863                 enic->lro_mgr.max_aggr = ENIC_LRO_MAX_AGGR;
1864                 enic->lro_mgr.max_desc = ENIC_LRO_MAX_DESC;
1865                 enic->lro_mgr.lro_arr = enic->lro_desc;
1866                 enic->lro_mgr.get_skb_header = enic_get_skb_header;
1867                 enic->lro_mgr.features  = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
1868                 enic->lro_mgr.dev = netdev;
1869                 enic->lro_mgr.ip_summed = CHECKSUM_COMPLETE;
1870                 enic->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1871         }
1872
1873         err = register_netdev(netdev);
1874         if (err) {
1875                 printk(KERN_ERR PFX
1876                         "%s: Cannot register net device, aborting.\n",
1877                         netdev->name);
1878                 goto err_out_notify_unset;
1879         }
1880
1881         return 0;
1882
1883 err_out_notify_unset:
1884         vnic_dev_notify_unset(enic->vdev);
1885 err_out_free_vnic_resources:
1886         enic_free_vnic_resources(enic);
1887         enic_free_intr(enic);
1888 err_out_dev_close:
1889         vnic_dev_close(enic->vdev);
1890 err_out_vnic_unregister:
1891         enic_clear_intr_mode(enic);
1892         vnic_dev_unregister(enic->vdev);
1893 err_out_iounmap:
1894         enic_iounmap(enic);
1895 err_out_release_regions:
1896         pci_release_regions(pdev);
1897 err_out_disable_device:
1898         pci_disable_device(pdev);
1899 err_out_free_netdev:
1900         pci_set_drvdata(pdev, NULL);
1901         free_netdev(netdev);
1902
1903         return err;
1904 }
1905
1906 static void __devexit enic_remove(struct pci_dev *pdev)
1907 {
1908         struct net_device *netdev = pci_get_drvdata(pdev);
1909
1910         if (netdev) {
1911                 struct enic *enic = netdev_priv(netdev);
1912
1913                 flush_scheduled_work();
1914                 unregister_netdev(netdev);
1915                 vnic_dev_notify_unset(enic->vdev);
1916                 enic_free_vnic_resources(enic);
1917                 enic_free_intr(enic);
1918                 vnic_dev_close(enic->vdev);
1919                 enic_clear_intr_mode(enic);
1920                 vnic_dev_unregister(enic->vdev);
1921                 enic_iounmap(enic);
1922                 pci_release_regions(pdev);
1923                 pci_disable_device(pdev);
1924                 pci_set_drvdata(pdev, NULL);
1925                 free_netdev(netdev);
1926         }
1927 }
1928
1929 static struct pci_driver enic_driver = {
1930         .name = DRV_NAME,
1931         .id_table = enic_id_table,
1932         .probe = enic_probe,
1933         .remove = __devexit_p(enic_remove),
1934 };
1935
1936 static int __init enic_init_module(void)
1937 {
1938         printk(KERN_INFO PFX "%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
1939
1940         return pci_register_driver(&enic_driver);
1941 }
1942
1943 static void __exit enic_cleanup_module(void)
1944 {
1945         pci_unregister_driver(&enic_driver);
1946 }
1947
1948 module_init(enic_init_module);
1949 module_exit(enic_cleanup_module);