drivers/net/enic/enic_main.c

   1 /*
   2  * Copyright 2008-2010 Cisco Systems, Inc.  All rights reserved.
   3  * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
   4  *
   5  * This program is free software; you may redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; version 2 of the License.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  10  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  11  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  12  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  13  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  14  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  15  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  16  * SOFTWARE.
  17  *
  18  */
  19
  20 #include <linux/module.h>
  21 #include <linux/kernel.h>
  22 #include <linux/string.h>
  23 #include <linux/errno.h>
  24 #include <linux/types.h>
  25 #include <linux/init.h>
  26 #include <linux/workqueue.h>
  27 #include <linux/pci.h>
  28 #include <linux/netdevice.h>
  29 #include <linux/etherdevice.h>
  30 #include <linux/if_ether.h>
  31 #include <linux/if_vlan.h>
  32 #include <linux/ethtool.h>
  33 #include <linux/in.h>
  34 #include <linux/ip.h>
  35 #include <linux/ipv6.h>
  36 #include <linux/tcp.h>
  37 #include <linux/rtnetlink.h>
  38 #include <net/ip6_checksum.h>
  39
  40 #include "cq_enet_desc.h"
  41 #include "vnic_dev.h"
  42 #include "vnic_intr.h"
  43 #include "vnic_stats.h"
  44 #include "vnic_vic.h"
  45 #include "enic_res.h"
  46 #include "enic.h"
  47 #include "enic_dev.h"
  48 #include "enic_pp.h"
  49
  50 #define ENIC_NOTIFY_TIMER_PERIOD        (2 * HZ)
  51 #define WQ_ENET_MAX_DESC_LEN            (1 << WQ_ENET_LEN_BITS)
  52 #define MAX_TSO                         (1 << 16)
  53 #define ENIC_DESC_MAX_SPLITS            (MAX_TSO / WQ_ENET_MAX_DESC_LEN + 1)
  54
  55 #define PCI_DEVICE_ID_CISCO_VIC_ENET         0x0043  /* ethernet vnic */
  56 #define PCI_DEVICE_ID_CISCO_VIC_ENET_DYN     0x0044  /* enet dynamic vnic */
  57
  58 /* Supported devices */
  59 static DEFINE_PCI_DEVICE_TABLE(enic_id_table) = {
  60         { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET) },
  61         { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_DYN) },
  62         { 0, }  /* end of table */
  63 };
  64
  65 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  66 MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>");
  67 MODULE_LICENSE("GPL");
  68 MODULE_VERSION(DRV_VERSION);
  69 MODULE_DEVICE_TABLE(pci, enic_id_table);
  70
  71 struct enic_stat {
  72         char name[ETH_GSTRING_LEN];
  73         unsigned int offset;
  74 };
  75
  76 #define ENIC_TX_STAT(stat)      \
  77         { .name = #stat, .offset = offsetof(struct vnic_tx_stats, stat) / 8 }
  78 #define ENIC_RX_STAT(stat)      \
  79         { .name = #stat, .offset = offsetof(struct vnic_rx_stats, stat) / 8 }
  80
  81 static const struct enic_stat enic_tx_stats[] = {
  82         ENIC_TX_STAT(tx_frames_ok),
  83         ENIC_TX_STAT(tx_unicast_frames_ok),
  84         ENIC_TX_STAT(tx_multicast_frames_ok),
  85         ENIC_TX_STAT(tx_broadcast_frames_ok),
  86         ENIC_TX_STAT(tx_bytes_ok),
  87         ENIC_TX_STAT(tx_unicast_bytes_ok),
  88         ENIC_TX_STAT(tx_multicast_bytes_ok),
  89         ENIC_TX_STAT(tx_broadcast_bytes_ok),
  90         ENIC_TX_STAT(tx_drops),
  91         ENIC_TX_STAT(tx_errors),
  92         ENIC_TX_STAT(tx_tso),
  93 };
  94
  95 static const struct enic_stat enic_rx_stats[] = {
  96         ENIC_RX_STAT(rx_frames_ok),
  97         ENIC_RX_STAT(rx_frames_total),
  98         ENIC_RX_STAT(rx_unicast_frames_ok),
  99         ENIC_RX_STAT(rx_multicast_frames_ok),
 100         ENIC_RX_STAT(rx_broadcast_frames_ok),
 101         ENIC_RX_STAT(rx_bytes_ok),
 102         ENIC_RX_STAT(rx_unicast_bytes_ok),
 103         ENIC_RX_STAT(rx_multicast_bytes_ok),
 104         ENIC_RX_STAT(rx_broadcast_bytes_ok),
 105         ENIC_RX_STAT(rx_drop),
 106         ENIC_RX_STAT(rx_no_bufs),
 107         ENIC_RX_STAT(rx_errors),
 108         ENIC_RX_STAT(rx_rss),
 109         ENIC_RX_STAT(rx_crc_errors),
 110         ENIC_RX_STAT(rx_frames_64),
 111         ENIC_RX_STAT(rx_frames_127),
 112         ENIC_RX_STAT(rx_frames_255),
 113         ENIC_RX_STAT(rx_frames_511),
 114         ENIC_RX_STAT(rx_frames_1023),
 115         ENIC_RX_STAT(rx_frames_1518),
 116         ENIC_RX_STAT(rx_frames_to_max),
 117 };
 118
 119 static const unsigned int enic_n_tx_stats = ARRAY_SIZE(enic_tx_stats);
 120 static const unsigned int enic_n_rx_stats = ARRAY_SIZE(enic_rx_stats);
 121
 122 static int enic_is_dynamic(struct enic *enic)
 123 {
 124         return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_DYN;
 125 }
 126
 127 static inline unsigned int enic_cq_rq(struct enic *enic, unsigned int rq)
 128 {
 129         return rq;
 130 }
 131
 132 static inline unsigned int enic_cq_wq(struct enic *enic, unsigned int wq)
 133 {
 134         return enic->rq_count + wq;
 135 }
 136
 137 static inline unsigned int enic_legacy_io_intr(void)
 138 {
 139         return 0;
 140 }
 141
 142 static inline unsigned int enic_legacy_err_intr(void)
 143 {
 144         return 1;
 145 }
 146
 147 static inline unsigned int enic_legacy_notify_intr(void)
 148 {
 149         return 2;
 150 }
 151
 152 static inline unsigned int enic_msix_rq_intr(struct enic *enic, unsigned int rq)
 153 {
 154         return rq;
 155 }
 156
 157 static inline unsigned int enic_msix_wq_intr(struct enic *enic, unsigned int wq)
 158 {
 159         return enic->rq_count + wq;
 160 }
 161
 162 static inline unsigned int enic_msix_err_intr(struct enic *enic)
 163 {
 164         return enic->rq_count + enic->wq_count;
 165 }
 166
 167 static inline unsigned int enic_msix_notify_intr(struct enic *enic)
 168 {
 169         return enic->rq_count + enic->wq_count + 1;
 170 }
 171
 172 static int enic_get_settings(struct net_device *netdev,
 173         struct ethtool_cmd *ecmd)
 174 {
 175         struct enic *enic = netdev_priv(netdev);
 176
 177         ecmd->supported = (SUPPORTED_10000baseT_Full | SUPPORTED_FIBRE);
 178         ecmd->advertising = (ADVERTISED_10000baseT_Full | ADVERTISED_FIBRE);
 179         ecmd->port = PORT_FIBRE;
 180         ecmd->transceiver = XCVR_EXTERNAL;
 181
 182         if (netif_carrier_ok(netdev)) {
 183                 ecmd->speed = vnic_dev_port_speed(enic->vdev);
 184                 ecmd->duplex = DUPLEX_FULL;
 185         } else {
 186                 ecmd->speed = -1;
 187                 ecmd->duplex = -1;
 188         }
 189
 190         ecmd->autoneg = AUTONEG_DISABLE;
 191
 192         return 0;
 193 }
 194
 195 static void enic_get_drvinfo(struct net_device *netdev,
 196         struct ethtool_drvinfo *drvinfo)
 197 {
 198         struct enic *enic = netdev_priv(netdev);
 199         struct vnic_devcmd_fw_info *fw_info;
 200
 201         enic_dev_fw_info(enic, &fw_info);
 202
 203         strncpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
 204         strncpy(drvinfo->version, DRV_VERSION, sizeof(drvinfo->version));
 205         strncpy(drvinfo->fw_version, fw_info->fw_version,
 206                 sizeof(drvinfo->fw_version));
 207         strncpy(drvinfo->bus_info, pci_name(enic->pdev),
 208                 sizeof(drvinfo->bus_info));
 209 }
 210
 211 static void enic_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
 212 {
 213         unsigned int i;
 214
 215         switch (stringset) {
 216         case ETH_SS_STATS:
 217                 for (i = 0; i < enic_n_tx_stats; i++) {
 218                         memcpy(data, enic_tx_stats[i].name, ETH_GSTRING_LEN);
 219                         data += ETH_GSTRING_LEN;
 220                 }
 221                 for (i = 0; i < enic_n_rx_stats; i++) {
 222                         memcpy(data, enic_rx_stats[i].name, ETH_GSTRING_LEN);
 223                         data += ETH_GSTRING_LEN;
 224                 }
 225                 break;
 226         }
 227 }
 228
 229 static int enic_get_sset_count(struct net_device *netdev, int sset)
 230 {
 231         switch (sset) {
 232         case ETH_SS_STATS:
 233                 return enic_n_tx_stats + enic_n_rx_stats;
 234         default:
 235                 return -EOPNOTSUPP;
 236         }
 237 }
 238
 239 static void enic_get_ethtool_stats(struct net_device *netdev,
 240         struct ethtool_stats *stats, u64 *data)
 241 {
 242         struct enic *enic = netdev_priv(netdev);
 243         struct vnic_stats *vstats;
 244         unsigned int i;
 245
 246         enic_dev_stats_dump(enic, &vstats);
 247
 248         for (i = 0; i < enic_n_tx_stats; i++)
 249                 *(data++) = ((u64 *)&vstats->tx)[enic_tx_stats[i].offset];
 250         for (i = 0; i < enic_n_rx_stats; i++)
 251                 *(data++) = ((u64 *)&vstats->rx)[enic_rx_stats[i].offset];
 252 }
 253
 254 static u32 enic_get_rx_csum(struct net_device *netdev)
 255 {
 256         struct enic *enic = netdev_priv(netdev);
 257         return enic->csum_rx_enabled;
 258 }
 259
 260 static int enic_set_rx_csum(struct net_device *netdev, u32 data)
 261 {
 262         struct enic *enic = netdev_priv(netdev);
 263
 264         if (data && !ENIC_SETTING(enic, RXCSUM))
 265                 return -EINVAL;
 266
 267         enic->csum_rx_enabled = !!data;
 268
 269         return 0;
 270 }
 271
 272 static int enic_set_tx_csum(struct net_device *netdev, u32 data)
 273 {
 274         struct enic *enic = netdev_priv(netdev);
 275
 276         if (data && !ENIC_SETTING(enic, TXCSUM))
 277                 return -EINVAL;
 278
 279         if (data)
 280                 netdev->features |= NETIF_F_HW_CSUM;
 281         else
 282                 netdev->features &= ~NETIF_F_HW_CSUM;
 283
 284         return 0;
 285 }
 286
 287 static int enic_set_tso(struct net_device *netdev, u32 data)
 288 {
 289         struct enic *enic = netdev_priv(netdev);
 290
 291         if (data && !ENIC_SETTING(enic, TSO))
 292                 return -EINVAL;
 293
 294         if (data)
 295                 netdev->features |=
 296                         NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN;
 297         else
 298                 netdev->features &=
 299                         ~(NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN);
 300
 301         return 0;
 302 }
 303
 304 static u32 enic_get_msglevel(struct net_device *netdev)
 305 {
 306         struct enic *enic = netdev_priv(netdev);
 307         return enic->msg_enable;
 308 }
 309
 310 static void enic_set_msglevel(struct net_device *netdev, u32 value)
 311 {
 312         struct enic *enic = netdev_priv(netdev);
 313         enic->msg_enable = value;
 314 }
 315
 316 static int enic_get_coalesce(struct net_device *netdev,
 317         struct ethtool_coalesce *ecmd)
 318 {
 319         struct enic *enic = netdev_priv(netdev);
 320
 321         ecmd->tx_coalesce_usecs = enic->tx_coalesce_usecs;
 322         ecmd->rx_coalesce_usecs = enic->rx_coalesce_usecs;
 323
 324         return 0;
 325 }
 326
 327 static int enic_set_coalesce(struct net_device *netdev,
 328         struct ethtool_coalesce *ecmd)
 329 {
 330         struct enic *enic = netdev_priv(netdev);
 331         u32 tx_coalesce_usecs;
 332         u32 rx_coalesce_usecs;
 333         unsigned int i, intr;
 334
 335         tx_coalesce_usecs = min_t(u32,
 336                 INTR_COALESCE_HW_TO_USEC(VNIC_INTR_TIMER_MAX),
 337                 ecmd->tx_coalesce_usecs);
 338         rx_coalesce_usecs = min_t(u32,
 339                 INTR_COALESCE_HW_TO_USEC(VNIC_INTR_TIMER_MAX),
 340                 ecmd->rx_coalesce_usecs);
 341
 342         switch (vnic_dev_get_intr_mode(enic->vdev)) {
 343         case VNIC_DEV_INTR_MODE_INTX:
 344                 if (tx_coalesce_usecs != rx_coalesce_usecs)
 345                         return -EINVAL;
 346
 347                 intr = enic_legacy_io_intr();
 348                 vnic_intr_coalescing_timer_set(&enic->intr[intr],
 349                         INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs));
 350                 break;
 351         case VNIC_DEV_INTR_MODE_MSI:
 352                 if (tx_coalesce_usecs != rx_coalesce_usecs)
 353                         return -EINVAL;
 354
 355                 vnic_intr_coalescing_timer_set(&enic->intr[0],
 356                         INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs));
 357                 break;
 358         case VNIC_DEV_INTR_MODE_MSIX:
 359                 for (i = 0; i < enic->wq_count; i++) {
 360                         intr = enic_msix_wq_intr(enic, i);
 361                         vnic_intr_coalescing_timer_set(&enic->intr[intr],
 362                                 INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs));
 363                 }
 364
 365                 for (i = 0; i < enic->rq_count; i++) {
 366                         intr = enic_msix_rq_intr(enic, i);
 367                         vnic_intr_coalescing_timer_set(&enic->intr[intr],
 368                                 INTR_COALESCE_USEC_TO_HW(rx_coalesce_usecs));
 369                 }
 370
 371                 break;
 372         default:
 373                 break;
 374         }
 375
 376         enic->tx_coalesce_usecs = tx_coalesce_usecs;
 377         enic->rx_coalesce_usecs = rx_coalesce_usecs;
 378
 379         return 0;
 380 }
 381
 382 static const struct ethtool_ops enic_ethtool_ops = {
 383         .get_settings = enic_get_settings,
 384         .get_drvinfo = enic_get_drvinfo,
 385         .get_msglevel = enic_get_msglevel,
 386         .set_msglevel = enic_set_msglevel,
 387         .get_link = ethtool_op_get_link,
 388         .get_strings = enic_get_strings,
 389         .get_sset_count = enic_get_sset_count,
 390         .get_ethtool_stats = enic_get_ethtool_stats,
 391         .get_rx_csum = enic_get_rx_csum,
 392         .set_rx_csum = enic_set_rx_csum,
 393         .get_tx_csum = ethtool_op_get_tx_csum,
 394         .set_tx_csum = enic_set_tx_csum,
 395         .get_sg = ethtool_op_get_sg,
 396         .set_sg = ethtool_op_set_sg,
 397         .get_tso = ethtool_op_get_tso,
 398         .set_tso = enic_set_tso,
 399         .get_coalesce = enic_get_coalesce,
 400         .set_coalesce = enic_set_coalesce,
 401         .get_flags = ethtool_op_get_flags,
 402 };
 403
 404 static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
 405 {
 406         struct enic *enic = vnic_dev_priv(wq->vdev);
 407
 408         if (buf->sop)
 409                 pci_unmap_single(enic->pdev, buf->dma_addr,
 410                         buf->len, PCI_DMA_TODEVICE);
 411         else
 412                 pci_unmap_page(enic->pdev, buf->dma_addr,
 413                         buf->len, PCI_DMA_TODEVICE);
 414
 415         if (buf->os_buf)
 416                 dev_kfree_skb_any(buf->os_buf);
 417 }
 418
 419 static void enic_wq_free_buf(struct vnic_wq *wq,
 420         struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque)
 421 {
 422         enic_free_wq_buf(wq, buf);
 423 }
 424
 425 static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
 426         u8 type, u16 q_number, u16 completed_index, void *opaque)
 427 {
 428         struct enic *enic = vnic_dev_priv(vdev);
 429
 430         spin_lock(&enic->wq_lock[q_number]);
 431
 432         vnic_wq_service(&enic->wq[q_number], cq_desc,
 433                 completed_index, enic_wq_free_buf,
 434                 opaque);
 435
 436         if (netif_queue_stopped(enic->netdev) &&
 437             vnic_wq_desc_avail(&enic->wq[q_number]) >=
 438             (MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS))
 439                 netif_wake_queue(enic->netdev);
 440
 441         spin_unlock(&enic->wq_lock[q_number]);
 442
 443         return 0;
 444 }
 445
 446 static void enic_log_q_error(struct enic *enic)
 447 {
 448         unsigned int i;
 449         u32 error_status;
 450
 451         for (i = 0; i < enic->wq_count; i++) {
 452                 error_status = vnic_wq_error_status(&enic->wq[i]);
 453                 if (error_status)
 454                         netdev_err(enic->netdev, "WQ[%d] error_status %d\n",
 455                                 i, error_status);
 456         }
 457
 458         for (i = 0; i < enic->rq_count; i++) {
 459                 error_status = vnic_rq_error_status(&enic->rq[i]);
 460                 if (error_status)
 461                         netdev_err(enic->netdev, "RQ[%d] error_status %d\n",
 462                                 i, error_status);
 463         }
 464 }
 465
 466 static void enic_msglvl_check(struct enic *enic)
 467 {
 468         u32 msg_enable = vnic_dev_msg_lvl(enic->vdev);
 469
 470         if (msg_enable != enic->msg_enable) {
 471                 netdev_info(enic->netdev, "msg lvl changed from 0x%x to 0x%x\n",
 472                         enic->msg_enable, msg_enable);
 473                 enic->msg_enable = msg_enable;
 474         }
 475 }
 476
 477 static void enic_mtu_check(struct enic *enic)
 478 {
 479         u32 mtu = vnic_dev_mtu(enic->vdev);
 480         struct net_device *netdev = enic->netdev;
 481
 482         if (mtu && mtu != enic->port_mtu) {
 483                 enic->port_mtu = mtu;
 484                 if (mtu < netdev->mtu)
 485                         netdev_warn(netdev,
 486                                 "interface MTU (%d) set higher "
 487                                 "than switch port MTU (%d)\n",
 488                                 netdev->mtu, mtu);
 489         }
 490 }
 491
 492 static void enic_link_check(struct enic *enic)
 493 {
 494         int link_status = vnic_dev_link_status(enic->vdev);
 495         int carrier_ok = netif_carrier_ok(enic->netdev);
 496
 497         if (link_status && !carrier_ok) {
 498                 netdev_info(enic->netdev, "Link UP\n");
 499                 netif_carrier_on(enic->netdev);
 500         } else if (!link_status && carrier_ok) {
 501                 netdev_info(enic->netdev, "Link DOWN\n");
 502                 netif_carrier_off(enic->netdev);
 503         }
 504 }
 505
 506 static void enic_notify_check(struct enic *enic)
 507 {
 508         enic_msglvl_check(enic);
 509         enic_mtu_check(enic);
 510         enic_link_check(enic);
 511 }
 512
 513 #define ENIC_TEST_INTR(pba, i) (pba & (1 << i))
 514
 515 static irqreturn_t enic_isr_legacy(int irq, void *data)
 516 {
 517         struct net_device *netdev = data;
 518         struct enic *enic = netdev_priv(netdev);
 519         unsigned int io_intr = enic_legacy_io_intr();
 520         unsigned int err_intr = enic_legacy_err_intr();
 521         unsigned int notify_intr = enic_legacy_notify_intr();
 522         u32 pba;
 523
 524         vnic_intr_mask(&enic->intr[io_intr]);
 525
 526         pba = vnic_intr_legacy_pba(enic->legacy_pba);
 527         if (!pba) {
 528                 vnic_intr_unmask(&enic->intr[io_intr]);
 529                 return IRQ_NONE;        /* not our interrupt */
 530         }
 531
 532         if (ENIC_TEST_INTR(pba, notify_intr)) {
 533                 vnic_intr_return_all_credits(&enic->intr[notify_intr]);
 534                 enic_notify_check(enic);
 535         }
 536
 537         if (ENIC_TEST_INTR(pba, err_intr)) {
 538                 vnic_intr_return_all_credits(&enic->intr[err_intr]);
 539                 enic_log_q_error(enic);
 540                 /* schedule recovery from WQ/RQ error */
 541                 schedule_work(&enic->reset);
 542                 return IRQ_HANDLED;
 543         }
 544
 545         if (ENIC_TEST_INTR(pba, io_intr)) {
 546                 if (napi_schedule_prep(&enic->napi[0]))
 547                         __napi_schedule(&enic->napi[0]);
 548         } else {
 549                 vnic_intr_unmask(&enic->intr[io_intr]);
 550         }
 551
 552         return IRQ_HANDLED;
 553 }
 554
 555 static irqreturn_t enic_isr_msi(int irq, void *data)
 556 {
 557         struct enic *enic = data;
 558
 559         /* With MSI, there is no sharing of interrupts, so this is
 560          * our interrupt and there is no need to ack it.  The device
 561          * is not providing per-vector masking, so the OS will not
 562          * write to PCI config space to mask/unmask the interrupt.
 563          * We're using mask_on_assertion for MSI, so the device
 564          * automatically masks the interrupt when the interrupt is
 565          * generated.  Later, when exiting polling, the interrupt
 566          * will be unmasked (see enic_poll).
 567          *
 568          * Also, the device uses the same PCIe Traffic Class (TC)
 569          * for Memory Write data and MSI, so there are no ordering
 570          * issues; the MSI will always arrive at the Root Complex
 571          * _after_ corresponding Memory Writes (i.e. descriptor
 572          * writes).
 573          */
 574
 575         napi_schedule(&enic->napi[0]);
 576
 577         return IRQ_HANDLED;
 578 }
 579
 580 static irqreturn_t enic_isr_msix_rq(int irq, void *data)
 581 {
 582         struct napi_struct *napi = data;
 583
 584         /* schedule NAPI polling for RQ cleanup */
 585         napi_schedule(napi);
 586
 587         return IRQ_HANDLED;
 588 }
 589
 590 static irqreturn_t enic_isr_msix_wq(int irq, void *data)
 591 {
 592         struct enic *enic = data;
 593         unsigned int cq = enic_cq_wq(enic, 0);
 594         unsigned int intr = enic_msix_wq_intr(enic, 0);
 595         unsigned int wq_work_to_do = -1; /* no limit */
 596         unsigned int wq_work_done;
 597
 598         wq_work_done = vnic_cq_service(&enic->cq[cq],
 599                 wq_work_to_do, enic_wq_service, NULL);
 600
 601         vnic_intr_return_credits(&enic->intr[intr],
 602                 wq_work_done,
 603                 1 /* unmask intr */,
 604                 1 /* reset intr timer */);
 605
 606         return IRQ_HANDLED;
 607 }
 608
 609 static irqreturn_t enic_isr_msix_err(int irq, void *data)
 610 {
 611         struct enic *enic = data;
 612         unsigned int intr = enic_msix_err_intr(enic);
 613
 614         vnic_intr_return_all_credits(&enic->intr[intr]);
 615
 616         enic_log_q_error(enic);
 617
 618         /* schedule recovery from WQ/RQ error */
 619         schedule_work(&enic->reset);
 620
 621         return IRQ_HANDLED;
 622 }
 623
 624 static irqreturn_t enic_isr_msix_notify(int irq, void *data)
 625 {
 626         struct enic *enic = data;
 627         unsigned int intr = enic_msix_notify_intr(enic);
 628
 629         vnic_intr_return_all_credits(&enic->intr[intr]);
 630         enic_notify_check(enic);
 631
 632         return IRQ_HANDLED;
 633 }
 634
 635 static inline void enic_queue_wq_skb_cont(struct enic *enic,
 636         struct vnic_wq *wq, struct sk_buff *skb,
 637         unsigned int len_left, int loopback)
 638 {
 639         skb_frag_t *frag;
 640
 641         /* Queue additional data fragments */
 642         for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
 643                 len_left -= frag->size;
 644                 enic_queue_wq_desc_cont(wq, skb,
 645                         pci_map_page(enic->pdev, frag->page,
 646                                 frag->page_offset, frag->size,
 647                                 PCI_DMA_TODEVICE),
 648                         frag->size,
 649                         (len_left == 0),        /* EOP? */
 650                         loopback);
 651         }
 652 }
 653
 654 static inline void enic_queue_wq_skb_vlan(struct enic *enic,
 655         struct vnic_wq *wq, struct sk_buff *skb,
 656         int vlan_tag_insert, unsigned int vlan_tag, int loopback)
 657 {
 658         unsigned int head_len = skb_headlen(skb);
 659         unsigned int len_left = skb->len - head_len;
 660         int eop = (len_left == 0);
 661
 662         /* Queue the main skb fragment. The fragments are no larger
 663          * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
 664          * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
 665          * per fragment is queued.
 666          */
 667         enic_queue_wq_desc(wq, skb,
 668                 pci_map_single(enic->pdev, skb->data,
 669                         head_len, PCI_DMA_TODEVICE),
 670                 head_len,
 671                 vlan_tag_insert, vlan_tag,
 672                 eop, loopback);
 673
 674         if (!eop)
 675                 enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
 676 }
 677
 678 static inline void enic_queue_wq_skb_csum_l4(struct enic *enic,
 679         struct vnic_wq *wq, struct sk_buff *skb,
 680         int vlan_tag_insert, unsigned int vlan_tag, int loopback)
 681 {
 682         unsigned int head_len = skb_headlen(skb);
 683         unsigned int len_left = skb->len - head_len;
 684         unsigned int hdr_len = skb_checksum_start_offset(skb);
 685         unsigned int csum_offset = hdr_len + skb->csum_offset;
 686         int eop = (len_left == 0);
 687
 688         /* Queue the main skb fragment. The fragments are no larger
 689          * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
 690          * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
 691          * per fragment is queued.
 692          */
 693         enic_queue_wq_desc_csum_l4(wq, skb,
 694                 pci_map_single(enic->pdev, skb->data,
 695                         head_len, PCI_DMA_TODEVICE),
 696                 head_len,
 697                 csum_offset,
 698                 hdr_len,
 699                 vlan_tag_insert, vlan_tag,
 700                 eop, loopback);
 701
 702         if (!eop)
 703                 enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
 704 }
 705
 706 static inline void enic_queue_wq_skb_tso(struct enic *enic,
 707         struct vnic_wq *wq, struct sk_buff *skb, unsigned int mss,
 708         int vlan_tag_insert, unsigned int vlan_tag, int loopback)
 709 {
 710         unsigned int frag_len_left = skb_headlen(skb);
 711         unsigned int len_left = skb->len - frag_len_left;
 712         unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
 713         int eop = (len_left == 0);
 714         unsigned int len;
 715         dma_addr_t dma_addr;
 716         unsigned int offset = 0;
 717         skb_frag_t *frag;
 718
 719         /* Preload TCP csum field with IP pseudo hdr calculated
 720          * with IP length set to zero.  HW will later add in length
 721          * to each TCP segment resulting from the TSO.
 722          */
 723
 724         if (skb->protocol == cpu_to_be16(ETH_P_IP)) {
 725                 ip_hdr(skb)->check = 0;
 726                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr,
 727                         ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
 728         } else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) {
 729                 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
 730                         &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
 731         }
 732
 733         /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
 734          * for the main skb fragment
 735          */
 736         while (frag_len_left) {
 737                 len = min(frag_len_left, (unsigned int)WQ_ENET_MAX_DESC_LEN);
 738                 dma_addr = pci_map_single(enic->pdev, skb->data + offset,
 739                                 len, PCI_DMA_TODEVICE);
 740                 enic_queue_wq_desc_tso(wq, skb,
 741                         dma_addr,
 742                         len,
 743                         mss, hdr_len,
 744                         vlan_tag_insert, vlan_tag,
 745                         eop && (len == frag_len_left), loopback);
 746                 frag_len_left -= len;
 747                 offset += len;
 748         }
 749
 750         if (eop)
 751                 return;
 752
 753         /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
 754          * for additional data fragments
 755          */
 756         for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
 757                 len_left -= frag->size;
 758                 frag_len_left = frag->size;
 759                 offset = frag->page_offset;
 760
 761                 while (frag_len_left) {
 762                         len = min(frag_len_left,
 763                                 (unsigned int)WQ_ENET_MAX_DESC_LEN);
 764                         dma_addr = pci_map_page(enic->pdev, frag->page,
 765                                 offset, len,
 766                                 PCI_DMA_TODEVICE);
 767                         enic_queue_wq_desc_cont(wq, skb,
 768                                 dma_addr,
 769                                 len,
 770                                 (len_left == 0) &&
 771                                 (len == frag_len_left),         /* EOP? */
 772                                 loopback);
 773                         frag_len_left -= len;
 774                         offset += len;
 775                 }
 776         }
 777 }
 778
 779 static inline void enic_queue_wq_skb(struct enic *enic,
 780         struct vnic_wq *wq, struct sk_buff *skb)
 781 {
 782         unsigned int mss = skb_shinfo(skb)->gso_size;
 783         unsigned int vlan_tag = 0;
 784         int vlan_tag_insert = 0;
 785         int loopback = 0;
 786
 787         if (vlan_tx_tag_present(skb)) {
 788                 /* VLAN tag from trunking driver */
 789                 vlan_tag_insert = 1;
 790                 vlan_tag = vlan_tx_tag_get(skb);
 791         } else if (enic->loop_enable) {
 792                 vlan_tag = enic->loop_tag;
 793                 loopback = 1;
 794         }
 795
 796         if (mss)
 797                 enic_queue_wq_skb_tso(enic, wq, skb, mss,
 798                         vlan_tag_insert, vlan_tag, loopback);
 799         else if (skb->ip_summed == CHECKSUM_PARTIAL)
 800                 enic_queue_wq_skb_csum_l4(enic, wq, skb,
 801                         vlan_tag_insert, vlan_tag, loopback);
 802         else
 803                 enic_queue_wq_skb_vlan(enic, wq, skb,
 804                         vlan_tag_insert, vlan_tag, loopback);
 805 }
 806
 807 /* netif_tx_lock held, process context with BHs disabled, or BH */
 808 static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb,
 809         struct net_device *netdev)
 810 {
 811         struct enic *enic = netdev_priv(netdev);
 812         struct vnic_wq *wq = &enic->wq[0];
 813         unsigned long flags;
 814
 815         if (skb->len <= 0) {
 816                 dev_kfree_skb(skb);
 817                 return NETDEV_TX_OK;
 818         }
 819
 820         /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs,
 821          * which is very likely.  In the off chance it's going to take
 822          * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb.
 823          */
 824
 825         if (skb_shinfo(skb)->gso_size == 0 &&
 826             skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC &&
 827             skb_linearize(skb)) {
 828                 dev_kfree_skb(skb);
 829                 return NETDEV_TX_OK;
 830         }
 831
 832         spin_lock_irqsave(&enic->wq_lock[0], flags);
 833
 834         if (vnic_wq_desc_avail(wq) <
 835             skb_shinfo(skb)->nr_frags + ENIC_DESC_MAX_SPLITS) {
 836                 netif_stop_queue(netdev);
 837                 /* This is a hard error, log it */
 838                 netdev_err(netdev, "BUG! Tx ring full when queue awake!\n");
 839                 spin_unlock_irqrestore(&enic->wq_lock[0], flags);
 840                 return NETDEV_TX_BUSY;
 841         }
 842
 843         enic_queue_wq_skb(enic, wq, skb);
 844
 845         if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS)
 846                 netif_stop_queue(netdev);
 847
 848         spin_unlock_irqrestore(&enic->wq_lock[0], flags);
 849
 850         return NETDEV_TX_OK;
 851 }
 852
 853 /* dev_base_lock rwlock held, nominally process context */
 854 static struct net_device_stats *enic_get_stats(struct net_device *netdev)
 855 {
 856         struct enic *enic = netdev_priv(netdev);
 857         struct net_device_stats *net_stats = &netdev->stats;
 858         struct vnic_stats *stats;
 859
 860         enic_dev_stats_dump(enic, &stats);
 861
 862         net_stats->tx_packets = stats->tx.tx_frames_ok;
 863         net_stats->tx_bytes = stats->tx.tx_bytes_ok;
 864         net_stats->tx_errors = stats->tx.tx_errors;
 865         net_stats->tx_dropped = stats->tx.tx_drops;
 866
 867         net_stats->rx_packets = stats->rx.rx_frames_ok;
 868         net_stats->rx_bytes = stats->rx.rx_bytes_ok;
 869         net_stats->rx_errors = stats->rx.rx_errors;
 870         net_stats->multicast = stats->rx.rx_multicast_frames_ok;
 871         net_stats->rx_over_errors = enic->rq_truncated_pkts;
 872         net_stats->rx_crc_errors = enic->rq_bad_fcs;
 873         net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop;
 874
 875         return net_stats;
 876 }
 877
 878 void enic_reset_addr_lists(struct enic *enic)
 879 {
 880         enic->mc_count = 0;
 881         enic->uc_count = 0;
 882         enic->flags = 0;
 883 }
 884
 885 static int enic_set_mac_addr(struct net_device *netdev, char *addr)
 886 {
 887         struct enic *enic = netdev_priv(netdev);
 888
 889         if (enic_is_dynamic(enic)) {
 890                 if (!is_valid_ether_addr(addr) && !is_zero_ether_addr(addr))
 891                         return -EADDRNOTAVAIL;
 892         } else {
 893                 if (!is_valid_ether_addr(addr))
 894                         return -EADDRNOTAVAIL;
 895         }
 896
 897         memcpy(netdev->dev_addr, addr, netdev->addr_len);
 898
 899         return 0;
 900 }
 901
 902 static int enic_set_mac_address_dynamic(struct net_device *netdev, void *p)
 903 {
 904         struct enic *enic = netdev_priv(netdev);
 905         struct sockaddr *saddr = p;
 906         char *addr = saddr->sa_data;
 907         int err;
 908
 909         if (netif_running(enic->netdev)) {
 910                 err = enic_dev_del_station_addr(enic);
 911                 if (err)
 912                         return err;
 913         }
 914
 915         err = enic_set_mac_addr(netdev, addr);
 916         if (err)
 917                 return err;
 918
 919         if (netif_running(enic->netdev)) {
 920                 err = enic_dev_add_station_addr(enic);
 921                 if (err)
 922                         return err;
 923         }
 924
 925         return err;
 926 }
 927
 928 static int enic_set_mac_address(struct net_device *netdev, void *p)
 929 {
 930         struct sockaddr *saddr = p;
 931         char *addr = saddr->sa_data;
 932         struct enic *enic = netdev_priv(netdev);
 933         int err;
 934
 935         err = enic_dev_del_station_addr(enic);
 936         if (err)
 937                 return err;
 938
 939         err = enic_set_mac_addr(netdev, addr);
 940         if (err)
 941                 return err;
 942
 943         return enic_dev_add_station_addr(enic);
 944 }
 945
 946 static void enic_update_multicast_addr_list(struct enic *enic)
 947 {
 948         struct net_device *netdev = enic->netdev;
 949         struct netdev_hw_addr *ha;
 950         unsigned int mc_count = netdev_mc_count(netdev);
 951         u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN];
 952         unsigned int i, j;
 953
 954         if (mc_count > ENIC_MULTICAST_PERFECT_FILTERS) {
 955                 netdev_warn(netdev, "Registering only %d out of %d "
 956                         "multicast addresses\n",
 957                         ENIC_MULTICAST_PERFECT_FILTERS, mc_count);
 958                 mc_count = ENIC_MULTICAST_PERFECT_FILTERS;
 959         }
 960
 961         /* Is there an easier way?  Trying to minimize to
 962          * calls to add/del multicast addrs.  We keep the
 963          * addrs from the last call in enic->mc_addr and
 964          * look for changes to add/del.
 965          */
 966
 967         i = 0;
 968         netdev_for_each_mc_addr(ha, netdev) {
 969                 if (i == mc_count)
 970                         break;
 971                 memcpy(mc_addr[i++], ha->addr, ETH_ALEN);
 972         }
 973
 974         for (i = 0; i < enic->mc_count; i++) {
 975                 for (j = 0; j < mc_count; j++)
 976                         if (compare_ether_addr(enic->mc_addr[i],
 977                                 mc_addr[j]) == 0)
 978                                 break;
 979                 if (j == mc_count)
 980                         enic_dev_del_addr(enic, enic->mc_addr[i]);
 981         }
 982
 983         for (i = 0; i < mc_count; i++) {
 984                 for (j = 0; j < enic->mc_count; j++)
 985                         if (compare_ether_addr(mc_addr[i],
 986                                 enic->mc_addr[j]) == 0)
 987                                 break;
 988                 if (j == enic->mc_count)
 989                         enic_dev_add_addr(enic, mc_addr[i]);
 990         }
 991
 992         /* Save the list to compare against next time
 993          */
 994
 995         for (i = 0; i < mc_count; i++)
 996                 memcpy(enic->mc_addr[i], mc_addr[i], ETH_ALEN);
 997
 998         enic->mc_count = mc_count;
 999 }
1000
1001 static void enic_update_unicast_addr_list(struct enic *enic)
1002 {
1003         struct net_device *netdev = enic->netdev;
1004         struct netdev_hw_addr *ha;
1005         unsigned int uc_count = netdev_uc_count(netdev);
1006         u8 uc_addr[ENIC_UNICAST_PERFECT_FILTERS][ETH_ALEN];
1007         unsigned int i, j;
1008
1009         if (uc_count > ENIC_UNICAST_PERFECT_FILTERS) {
1010                 netdev_warn(netdev, "Registering only %d out of %d "
1011                         "unicast addresses\n",
1012                         ENIC_UNICAST_PERFECT_FILTERS, uc_count);
1013                 uc_count = ENIC_UNICAST_PERFECT_FILTERS;
1014         }
1015
1016         /* Is there an easier way?  Trying to minimize to
1017          * calls to add/del unicast addrs.  We keep the
1018          * addrs from the last call in enic->uc_addr and
1019          * look for changes to add/del.
1020          */
1021
1022         i = 0;
1023         netdev_for_each_uc_addr(ha, netdev) {
1024                 if (i == uc_count)
1025                         break;
1026                 memcpy(uc_addr[i++], ha->addr, ETH_ALEN);
1027         }
1028
1029         for (i = 0; i < enic->uc_count; i++) {
1030                 for (j = 0; j < uc_count; j++)
1031                         if (compare_ether_addr(enic->uc_addr[i],
1032                                 uc_addr[j]) == 0)
1033                                 break;
1034                 if (j == uc_count)
1035                         enic_dev_del_addr(enic, enic->uc_addr[i]);
1036         }
1037
1038         for (i = 0; i < uc_count; i++) {
1039                 for (j = 0; j < enic->uc_count; j++)
1040                         if (compare_ether_addr(uc_addr[i],
1041                                 enic->uc_addr[j]) == 0)
1042                                 break;
1043                 if (j == enic->uc_count)
1044                         enic_dev_add_addr(enic, uc_addr[i]);
1045         }
1046
1047         /* Save the list to compare against next time
1048          */
1049
1050         for (i = 0; i < uc_count; i++)
1051                 memcpy(enic->uc_addr[i], uc_addr[i], ETH_ALEN);
1052
1053         enic->uc_count = uc_count;
1054 }
1055
1056 /* netif_tx_lock held, BHs disabled */
1057 static void enic_set_rx_mode(struct net_device *netdev)
1058 {
1059         struct enic *enic = netdev_priv(netdev);
1060         int directed = 1;
1061         int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0;
1062         int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0;
1063         int promisc = (netdev->flags & IFF_PROMISC) ||
1064                 netdev_uc_count(netdev) > ENIC_UNICAST_PERFECT_FILTERS;
1065         int allmulti = (netdev->flags & IFF_ALLMULTI) ||
1066                 netdev_mc_count(netdev) > ENIC_MULTICAST_PERFECT_FILTERS;
1067         unsigned int flags = netdev->flags |
1068                 (allmulti ? IFF_ALLMULTI : 0) |
1069                 (promisc ? IFF_PROMISC : 0);
1070
1071         if (enic->flags != flags) {
1072                 enic->flags = flags;
1073                 enic_dev_packet_filter(enic, directed,
1074                         multicast, broadcast, promisc, allmulti);
1075         }
1076
1077         if (!promisc) {
1078                 enic_update_unicast_addr_list(enic);
1079                 if (!allmulti)
1080                         enic_update_multicast_addr_list(enic);
1081         }
1082 }
1083
1084 /* rtnl lock is held */
1085 static void enic_vlan_rx_register(struct net_device *netdev,
1086         struct vlan_group *vlan_group)
1087 {
1088         struct enic *enic = netdev_priv(netdev);
1089         enic->vlan_group = vlan_group;
1090 }
1091
1092 /* netif_tx_lock held, BHs disabled */
1093 static void enic_tx_timeout(struct net_device *netdev)
1094 {
1095         struct enic *enic = netdev_priv(netdev);
1096         schedule_work(&enic->reset);
1097 }
1098
1099 static int enic_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
1100 {
1101         struct enic *enic = netdev_priv(netdev);
1102
1103         if (vf != PORT_SELF_VF)
1104                 return -EOPNOTSUPP;
1105
1106         /* Ignore the vf argument for now. We can assume the request
1107          * is coming on a vf.
1108          */
1109         if (is_valid_ether_addr(mac)) {
1110                 memcpy(enic->pp.vf_mac, mac, ETH_ALEN);
1111                 return 0;
1112         } else
1113                 return -EINVAL;
1114 }
1115
1116 static int enic_set_vf_port(struct net_device *netdev, int vf,
1117         struct nlattr *port[])
1118 {
1119         struct enic *enic = netdev_priv(netdev);
1120         struct enic_port_profile prev_pp;
1121         int err = 0, restore_pp = 1;
1122
1123         /* don't support VFs, yet */
1124         if (vf != PORT_SELF_VF)
1125                 return -EOPNOTSUPP;
1126
1127         if (!port[IFLA_PORT_REQUEST])
1128                 return -EOPNOTSUPP;
1129
1130         memcpy(&prev_pp, &enic->pp, sizeof(enic->pp));
1131         memset(&enic->pp, 0, sizeof(enic->pp));
1132
1133         enic->pp.set |= ENIC_SET_REQUEST;
1134         enic->pp.request = nla_get_u8(port[IFLA_PORT_REQUEST]);
1135
1136         if (port[IFLA_PORT_PROFILE]) {
1137                 enic->pp.set |= ENIC_SET_NAME;
1138                 memcpy(enic->pp.name, nla_data(port[IFLA_PORT_PROFILE]),
1139                         PORT_PROFILE_MAX);
1140         }
1141
1142         if (port[IFLA_PORT_INSTANCE_UUID]) {
1143                 enic->pp.set |= ENIC_SET_INSTANCE;
1144                 memcpy(enic->pp.instance_uuid,
1145                         nla_data(port[IFLA_PORT_INSTANCE_UUID]), PORT_UUID_MAX);
1146         }
1147
1148         if (port[IFLA_PORT_HOST_UUID]) {
1149                 enic->pp.set |= ENIC_SET_HOST;
1150                 memcpy(enic->pp.host_uuid,
1151                         nla_data(port[IFLA_PORT_HOST_UUID]), PORT_UUID_MAX);
1152         }
1153
1154         /* Special case handling: mac came from IFLA_VF_MAC */
1155         if (!is_zero_ether_addr(prev_pp.vf_mac))
1156                 memcpy(enic->pp.mac_addr, prev_pp.vf_mac, ETH_ALEN);
1157
1158                 if (is_zero_ether_addr(netdev->dev_addr))
1159                         random_ether_addr(netdev->dev_addr);
1160
1161         err = enic_process_set_pp_request(enic, &prev_pp, &restore_pp);
1162         if (err) {
1163                 if (restore_pp) {
1164                         /* Things are still the way they were: Implicit
1165                          * DISASSOCIATE failed
1166                          */
1167                         memcpy(&enic->pp, &prev_pp, sizeof(enic->pp));
1168                 } else {
1169                         memset(&enic->pp, 0, sizeof(enic->pp));
1170                         memset(netdev->dev_addr, 0, ETH_ALEN);
1171                 }
1172         } else {
1173                 /* Set flag to indicate that the port assoc/disassoc
1174                  * request has been sent out to fw
1175                  */
1176                 enic->pp.set |= ENIC_PORT_REQUEST_APPLIED;
1177
1178                 /* If DISASSOCIATE, clean up all assigned/saved macaddresses */
1179                 if (enic->pp.request == PORT_REQUEST_DISASSOCIATE) {
1180                         memset(enic->pp.mac_addr, 0, ETH_ALEN);
1181                         memset(netdev->dev_addr, 0, ETH_ALEN);
1182                 }
1183         }
1184
1185         memset(enic->pp.vf_mac, 0, ETH_ALEN);
1186
1187         return err;
1188 }
1189
1190 static int enic_get_vf_port(struct net_device *netdev, int vf,
1191         struct sk_buff *skb)
1192 {
1193         struct enic *enic = netdev_priv(netdev);
1194         u16 response = PORT_PROFILE_RESPONSE_SUCCESS;
1195         int err;
1196
1197         if (!(enic->pp.set & ENIC_PORT_REQUEST_APPLIED))
1198                 return -ENODATA;
1199
1200         err = enic_process_get_pp_request(enic, enic->pp.request, &response);
1201         if (err)
1202                 return err;
1203
1204         NLA_PUT_U16(skb, IFLA_PORT_REQUEST, enic->pp.request);
1205         NLA_PUT_U16(skb, IFLA_PORT_RESPONSE, response);
1206         if (enic->pp.set & ENIC_SET_NAME)
1207                 NLA_PUT(skb, IFLA_PORT_PROFILE, PORT_PROFILE_MAX,
1208                         enic->pp.name);
1209         if (enic->pp.set & ENIC_SET_INSTANCE)
1210                 NLA_PUT(skb, IFLA_PORT_INSTANCE_UUID, PORT_UUID_MAX,
1211                         enic->pp.instance_uuid);
1212         if (enic->pp.set & ENIC_SET_HOST)
1213                 NLA_PUT(skb, IFLA_PORT_HOST_UUID, PORT_UUID_MAX,
1214                         enic->pp.host_uuid);
1215
1216         return 0;
1217
1218 nla_put_failure:
1219         return -EMSGSIZE;
1220 }
1221
1222 static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
1223 {
1224         struct enic *enic = vnic_dev_priv(rq->vdev);
1225
1226         if (!buf->os_buf)
1227                 return;
1228
1229         pci_unmap_single(enic->pdev, buf->dma_addr,
1230                 buf->len, PCI_DMA_FROMDEVICE);
1231         dev_kfree_skb_any(buf->os_buf);
1232 }
1233
1234 static int enic_rq_alloc_buf(struct vnic_rq *rq)
1235 {
1236         struct enic *enic = vnic_dev_priv(rq->vdev);
1237         struct net_device *netdev = enic->netdev;
1238         struct sk_buff *skb;
1239         unsigned int len = netdev->mtu + VLAN_ETH_HLEN;
1240         unsigned int os_buf_index = 0;
1241         dma_addr_t dma_addr;
1242
1243         skb = netdev_alloc_skb_ip_align(netdev, len);
1244         if (!skb)
1245                 return -ENOMEM;
1246
1247         dma_addr = pci_map_single(enic->pdev, skb->data,
1248                 len, PCI_DMA_FROMDEVICE);
1249
1250         enic_queue_rq_desc(rq, skb, os_buf_index,
1251                 dma_addr, len);
1252
1253         return 0;
1254 }
1255
1256 static void enic_rq_indicate_buf(struct vnic_rq *rq,
1257         struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
1258         int skipped, void *opaque)
1259 {
1260         struct enic *enic = vnic_dev_priv(rq->vdev);
1261         struct net_device *netdev = enic->netdev;
1262         struct sk_buff *skb;
1263
1264         u8 type, color, eop, sop, ingress_port, vlan_stripped;
1265         u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
1266         u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
1267         u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
1268         u8 packet_error;
1269         u16 q_number, completed_index, bytes_written, vlan_tci, checksum;
1270         u32 rss_hash;
1271
1272         if (skipped)
1273                 return;
1274
1275         skb = buf->os_buf;
1276         prefetch(skb->data - NET_IP_ALIGN);
1277         pci_unmap_single(enic->pdev, buf->dma_addr,
1278                 buf->len, PCI_DMA_FROMDEVICE);
1279
1280         cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
1281                 &type, &color, &q_number, &completed_index,
1282                 &ingress_port, &fcoe, &eop, &sop, &rss_type,
1283                 &csum_not_calc, &rss_hash, &bytes_written,
1284                 &packet_error, &vlan_stripped, &vlan_tci, &checksum,
1285                 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
1286                 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
1287                 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
1288                 &fcs_ok);
1289
1290         if (packet_error) {
1291
1292                 if (!fcs_ok) {
1293                         if (bytes_written > 0)
1294                                 enic->rq_bad_fcs++;
1295                         else if (bytes_written == 0)
1296                                 enic->rq_truncated_pkts++;
1297                 }
1298
1299                 dev_kfree_skb_any(skb);
1300
1301                 return;
1302         }
1303
1304         if (eop && bytes_written > 0) {
1305
1306                 /* Good receive
1307                  */
1308
1309                 skb_put(skb, bytes_written);
1310                 skb->protocol = eth_type_trans(skb, netdev);
1311
1312                 if (enic->csum_rx_enabled && !csum_not_calc) {
1313                         skb->csum = htons(checksum);
1314                         skb->ip_summed = CHECKSUM_COMPLETE;
1315                 }
1316
1317                 skb->dev = netdev;
1318
1319                 if (enic->vlan_group && vlan_stripped &&
1320                         (vlan_tci & CQ_ENET_RQ_DESC_VLAN_TCI_VLAN_MASK)) {
1321
1322                         if (netdev->features & NETIF_F_GRO)
1323                                 vlan_gro_receive(&enic->napi[q_number],
1324                                         enic->vlan_group, vlan_tci, skb);
1325                         else
1326                                 vlan_hwaccel_receive_skb(skb,
1327                                         enic->vlan_group, vlan_tci);
1328
1329                 } else {
1330
1331                         if (netdev->features & NETIF_F_GRO)
1332                                 napi_gro_receive(&enic->napi[q_number], skb);
1333                         else
1334                                 netif_receive_skb(skb);
1335
1336                 }
1337         } else {
1338
1339                 /* Buffer overflow
1340                  */
1341
1342                 dev_kfree_skb_any(skb);
1343         }
1344 }
1345
1346 static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
1347         u8 type, u16 q_number, u16 completed_index, void *opaque)
1348 {
1349         struct enic *enic = vnic_dev_priv(vdev);
1350
1351         vnic_rq_service(&enic->rq[q_number], cq_desc,
1352                 completed_index, VNIC_RQ_RETURN_DESC,
1353                 enic_rq_indicate_buf, opaque);
1354
1355         return 0;
1356 }
1357
1358 static int enic_poll(struct napi_struct *napi, int budget)
1359 {
1360         struct net_device *netdev = napi->dev;
1361         struct enic *enic = netdev_priv(netdev);
1362         unsigned int cq_rq = enic_cq_rq(enic, 0);
1363         unsigned int cq_wq = enic_cq_wq(enic, 0);
1364         unsigned int intr = enic_legacy_io_intr();
1365         unsigned int rq_work_to_do = budget;
1366         unsigned int wq_work_to_do = -1; /* no limit */
1367         unsigned int  work_done, rq_work_done, wq_work_done;
1368         int err;
1369
1370         /* Service RQ (first) and WQ
1371          */
1372
1373         rq_work_done = vnic_cq_service(&enic->cq[cq_rq],
1374                 rq_work_to_do, enic_rq_service, NULL);
1375
1376         wq_work_done = vnic_cq_service(&enic->cq[cq_wq],
1377                 wq_work_to_do, enic_wq_service, NULL);
1378
1379         /* Accumulate intr event credits for this polling
1380          * cycle.  An intr event is the completion of a
1381          * a WQ or RQ packet.
1382          */
1383
1384         work_done = rq_work_done + wq_work_done;
1385
1386         if (work_done > 0)
1387                 vnic_intr_return_credits(&enic->intr[intr],
1388                         work_done,
1389                         0 /* don't unmask intr */,
1390                         0 /* don't reset intr timer */);
1391
1392         err = vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1393
1394         /* Buffer allocation failed. Stay in polling
1395          * mode so we can try to fill the ring again.
1396          */
1397
1398         if (err)
1399                 rq_work_done = rq_work_to_do;
1400
1401         if (rq_work_done < rq_work_to_do) {
1402
1403                 /* Some work done, but not enough to stay in polling,
1404                  * exit polling
1405                  */
1406
1407                 napi_complete(napi);
1408                 vnic_intr_unmask(&enic->intr[intr]);
1409         }
1410
1411         return rq_work_done;
1412 }
1413
1414 static int enic_poll_msix(struct napi_struct *napi, int budget)
1415 {
1416         struct net_device *netdev = napi->dev;
1417         struct enic *enic = netdev_priv(netdev);
1418         unsigned int rq = (napi - &enic->napi[0]);
1419         unsigned int cq = enic_cq_rq(enic, rq);
1420         unsigned int intr = enic_msix_rq_intr(enic, rq);
1421         unsigned int work_to_do = budget;
1422         unsigned int work_done;
1423         int err;
1424
1425         /* Service RQ
1426          */
1427
1428         work_done = vnic_cq_service(&enic->cq[cq],
1429                 work_to_do, enic_rq_service, NULL);
1430
1431         /* Return intr event credits for this polling
1432          * cycle.  An intr event is the completion of a
1433          * RQ packet.
1434          */
1435
1436         if (work_done > 0)
1437                 vnic_intr_return_credits(&enic->intr[intr],
1438                         work_done,
1439                         0 /* don't unmask intr */,
1440                         0 /* don't reset intr timer */);
1441
1442         err = vnic_rq_fill(&enic->rq[rq], enic_rq_alloc_buf);
1443
1444         /* Buffer allocation failed. Stay in polling mode
1445          * so we can try to fill the ring again.
1446          */
1447
1448         if (err)
1449                 work_done = work_to_do;
1450
1451         if (work_done < work_to_do) {
1452
1453                 /* Some work done, but not enough to stay in polling,
1454                  * exit polling
1455                  */
1456
1457                 napi_complete(napi);
1458                 vnic_intr_unmask(&enic->intr[intr]);
1459         }
1460
1461         return work_done;
1462 }
1463
1464 static void enic_notify_timer(unsigned long data)
1465 {
1466         struct enic *enic = (struct enic *)data;
1467
1468         enic_notify_check(enic);
1469
1470         mod_timer(&enic->notify_timer,
1471                 round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD));
1472 }
1473
1474 static void enic_free_intr(struct enic *enic)
1475 {
1476         struct net_device *netdev = enic->netdev;
1477         unsigned int i;
1478
1479         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1480         case VNIC_DEV_INTR_MODE_INTX:
1481                 free_irq(enic->pdev->irq, netdev);
1482                 break;
1483         case VNIC_DEV_INTR_MODE_MSI:
1484                 free_irq(enic->pdev->irq, enic);
1485                 break;
1486         case VNIC_DEV_INTR_MODE_MSIX:
1487                 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1488                         if (enic->msix[i].requested)
1489                                 free_irq(enic->msix_entry[i].vector,
1490                                         enic->msix[i].devid);
1491                 break;
1492         default:
1493                 break;
1494         }
1495 }
1496
1497 static int enic_request_intr(struct enic *enic)
1498 {
1499         struct net_device *netdev = enic->netdev;
1500         unsigned int i, intr;
1501         int err = 0;
1502
1503         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1504
1505         case VNIC_DEV_INTR_MODE_INTX:
1506
1507                 err = request_irq(enic->pdev->irq, enic_isr_legacy,
1508                         IRQF_SHARED, netdev->name, netdev);
1509                 break;
1510
1511         case VNIC_DEV_INTR_MODE_MSI:
1512
1513                 err = request_irq(enic->pdev->irq, enic_isr_msi,
1514                         0, netdev->name, enic);
1515                 break;
1516
1517         case VNIC_DEV_INTR_MODE_MSIX:
1518
1519                 for (i = 0; i < enic->rq_count; i++) {
1520                         intr = enic_msix_rq_intr(enic, i);
1521                         sprintf(enic->msix[intr].devname,
1522                                 "%.11s-rx-%d", netdev->name, i);
1523                         enic->msix[intr].isr = enic_isr_msix_rq;
1524                         enic->msix[intr].devid = &enic->napi[i];
1525                 }
1526
1527                 for (i = 0; i < enic->wq_count; i++) {
1528                         intr = enic_msix_wq_intr(enic, i);
1529                         sprintf(enic->msix[intr].devname,
1530                                 "%.11s-tx-%d", netdev->name, i);
1531                         enic->msix[intr].isr = enic_isr_msix_wq;
1532                         enic->msix[intr].devid = enic;
1533                 }
1534
1535                 intr = enic_msix_err_intr(enic);
1536                 sprintf(enic->msix[intr].devname,
1537                         "%.11s-err", netdev->name);
1538                 enic->msix[intr].isr = enic_isr_msix_err;
1539                 enic->msix[intr].devid = enic;
1540
1541                 intr = enic_msix_notify_intr(enic);
1542                 sprintf(enic->msix[intr].devname,
1543                         "%.11s-notify", netdev->name);
1544                 enic->msix[intr].isr = enic_isr_msix_notify;
1545                 enic->msix[intr].devid = enic;
1546
1547                 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1548                         enic->msix[i].requested = 0;
1549
1550                 for (i = 0; i < enic->intr_count; i++) {
1551                         err = request_irq(enic->msix_entry[i].vector,
1552                                 enic->msix[i].isr, 0,
1553                                 enic->msix[i].devname,
1554                                 enic->msix[i].devid);
1555                         if (err) {
1556                                 enic_free_intr(enic);
1557                                 break;
1558                         }
1559                         enic->msix[i].requested = 1;
1560                 }
1561
1562                 break;
1563
1564         default:
1565                 break;
1566         }
1567
1568         return err;
1569 }
1570
1571 static void enic_synchronize_irqs(struct enic *enic)
1572 {
1573         unsigned int i;
1574
1575         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1576         case VNIC_DEV_INTR_MODE_INTX:
1577         case VNIC_DEV_INTR_MODE_MSI:
1578                 synchronize_irq(enic->pdev->irq);
1579                 break;
1580         case VNIC_DEV_INTR_MODE_MSIX:
1581                 for (i = 0; i < enic->intr_count; i++)
1582                         synchronize_irq(enic->msix_entry[i].vector);
1583                 break;
1584         default:
1585                 break;
1586         }
1587 }
1588
1589 static int enic_dev_notify_set(struct enic *enic)
1590 {
1591         int err;
1592
1593         spin_lock(&enic->devcmd_lock);
1594         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1595         case VNIC_DEV_INTR_MODE_INTX:
1596                 err = vnic_dev_notify_set(enic->vdev,
1597                         enic_legacy_notify_intr());
1598                 break;
1599         case VNIC_DEV_INTR_MODE_MSIX:
1600                 err = vnic_dev_notify_set(enic->vdev,
1601                         enic_msix_notify_intr(enic));
1602                 break;
1603         default:
1604                 err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */);
1605                 break;
1606         }
1607         spin_unlock(&enic->devcmd_lock);
1608
1609         return err;
1610 }
1611
1612 static void enic_notify_timer_start(struct enic *enic)
1613 {
1614         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1615         case VNIC_DEV_INTR_MODE_MSI:
1616                 mod_timer(&enic->notify_timer, jiffies);
1617                 break;
1618         default:
1619                 /* Using intr for notification for INTx/MSI-X */
1620                 break;
1621         };
1622 }
1623
1624 /* rtnl lock is held, process context */
1625 static int enic_open(struct net_device *netdev)
1626 {
1627         struct enic *enic = netdev_priv(netdev);
1628         unsigned int i;
1629         int err;
1630
1631         err = enic_request_intr(enic);
1632         if (err) {
1633                 netdev_err(netdev, "Unable to request irq.\n");
1634                 return err;
1635         }
1636
1637         err = enic_dev_notify_set(enic);
1638         if (err) {
1639                 netdev_err(netdev,
1640                         "Failed to alloc notify buffer, aborting.\n");
1641                 goto err_out_free_intr;
1642         }
1643
1644         for (i = 0; i < enic->rq_count; i++) {
1645                 vnic_rq_fill(&enic->rq[i], enic_rq_alloc_buf);
1646                 /* Need at least one buffer on ring to get going */
1647                 if (vnic_rq_desc_used(&enic->rq[i]) == 0) {
1648                         netdev_err(netdev, "Unable to alloc receive buffers\n");
1649                         err = -ENOMEM;
1650                         goto err_out_notify_unset;
1651                 }
1652         }
1653
1654         for (i = 0; i < enic->wq_count; i++)
1655                 vnic_wq_enable(&enic->wq[i]);
1656         for (i = 0; i < enic->rq_count; i++)
1657                 vnic_rq_enable(&enic->rq[i]);
1658
1659         if (enic_is_dynamic(enic) && !is_zero_ether_addr(enic->pp.mac_addr))
1660                 enic_dev_add_addr(enic, enic->pp.mac_addr);
1661         else
1662                 enic_dev_add_station_addr(enic);
1663         enic_set_rx_mode(netdev);
1664
1665         netif_wake_queue(netdev);
1666
1667         for (i = 0; i < enic->rq_count; i++)
1668                 napi_enable(&enic->napi[i]);
1669
1670         enic_dev_enable(enic);
1671
1672         for (i = 0; i < enic->intr_count; i++)
1673                 vnic_intr_unmask(&enic->intr[i]);
1674
1675         enic_notify_timer_start(enic);
1676
1677         return 0;
1678
1679 err_out_notify_unset:
1680         enic_dev_notify_unset(enic);
1681 err_out_free_intr:
1682         enic_free_intr(enic);
1683
1684         return err;
1685 }
1686
1687 /* rtnl lock is held, process context */
1688 static int enic_stop(struct net_device *netdev)
1689 {
1690         struct enic *enic = netdev_priv(netdev);
1691         unsigned int i;
1692         int err;
1693
1694         for (i = 0; i < enic->intr_count; i++) {
1695                 vnic_intr_mask(&enic->intr[i]);
1696                 (void)vnic_intr_masked(&enic->intr[i]); /* flush write */
1697         }
1698
1699         enic_synchronize_irqs(enic);
1700
1701         del_timer_sync(&enic->notify_timer);
1702
1703         enic_dev_disable(enic);
1704
1705         for (i = 0; i < enic->rq_count; i++)
1706                 napi_disable(&enic->napi[i]);
1707
1708         netif_carrier_off(netdev);
1709         netif_tx_disable(netdev);
1710         if (enic_is_dynamic(enic) && !is_zero_ether_addr(enic->pp.mac_addr))
1711                 enic_dev_del_addr(enic, enic->pp.mac_addr);
1712         else
1713                 enic_dev_del_station_addr(enic);
1714
1715         for (i = 0; i < enic->wq_count; i++) {
1716                 err = vnic_wq_disable(&enic->wq[i]);
1717                 if (err)
1718                         return err;
1719         }
1720         for (i = 0; i < enic->rq_count; i++) {
1721                 err = vnic_rq_disable(&enic->rq[i]);
1722                 if (err)
1723                         return err;
1724         }
1725
1726         enic_dev_notify_unset(enic);
1727         enic_free_intr(enic);
1728
1729         for (i = 0; i < enic->wq_count; i++)
1730                 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
1731         for (i = 0; i < enic->rq_count; i++)
1732                 vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
1733         for (i = 0; i < enic->cq_count; i++)
1734                 vnic_cq_clean(&enic->cq[i]);
1735         for (i = 0; i < enic->intr_count; i++)
1736                 vnic_intr_clean(&enic->intr[i]);
1737
1738         return 0;
1739 }
1740
1741 static int enic_change_mtu(struct net_device *netdev, int new_mtu)
1742 {
1743         struct enic *enic = netdev_priv(netdev);
1744         int running = netif_running(netdev);
1745
1746         if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU)
1747                 return -EINVAL;
1748
1749         if (running)
1750                 enic_stop(netdev);
1751
1752         netdev->mtu = new_mtu;
1753
1754         if (netdev->mtu > enic->port_mtu)
1755                 netdev_warn(netdev,
1756                         "interface MTU (%d) set higher than port MTU (%d)\n",
1757                         netdev->mtu, enic->port_mtu);
1758
1759         if (running)
1760                 enic_open(netdev);
1761
1762         return 0;
1763 }
1764
1765 #ifdef CONFIG_NET_POLL_CONTROLLER
1766 static void enic_poll_controller(struct net_device *netdev)
1767 {
1768         struct enic *enic = netdev_priv(netdev);
1769         struct vnic_dev *vdev = enic->vdev;
1770         unsigned int i, intr;
1771
1772         switch (vnic_dev_get_intr_mode(vdev)) {
1773         case VNIC_DEV_INTR_MODE_MSIX:
1774                 for (i = 0; i < enic->rq_count; i++) {
1775                         intr = enic_msix_rq_intr(enic, i);
1776                         enic_isr_msix_rq(enic->msix_entry[intr].vector,
1777                                 &enic->napi[i]);
1778                 }
1779                 intr = enic_msix_wq_intr(enic, i);
1780                 enic_isr_msix_wq(enic->msix_entry[intr].vector, enic);
1781                 break;
1782         case VNIC_DEV_INTR_MODE_MSI:
1783                 enic_isr_msi(enic->pdev->irq, enic);
1784                 break;
1785         case VNIC_DEV_INTR_MODE_INTX:
1786                 enic_isr_legacy(enic->pdev->irq, netdev);
1787                 break;
1788         default:
1789                 break;
1790         }
1791 }
1792 #endif
1793
1794 static int enic_dev_wait(struct vnic_dev *vdev,
1795         int (*start)(struct vnic_dev *, int),
1796         int (*finished)(struct vnic_dev *, int *),
1797         int arg)
1798 {
1799         unsigned long time;
1800         int done;
1801         int err;
1802
1803         BUG_ON(in_interrupt());
1804
1805         err = start(vdev, arg);
1806         if (err)
1807                 return err;
1808
1809         /* Wait for func to complete...2 seconds max
1810          */
1811
1812         time = jiffies + (HZ * 2);
1813         do {
1814
1815                 err = finished(vdev, &done);
1816                 if (err)
1817                         return err;
1818
1819                 if (done)
1820                         return 0;
1821
1822                 schedule_timeout_uninterruptible(HZ / 10);
1823
1824         } while (time_after(time, jiffies));
1825
1826         return -ETIMEDOUT;
1827 }
1828
1829 static int enic_dev_open(struct enic *enic)
1830 {
1831         int err;
1832
1833         err = enic_dev_wait(enic->vdev, vnic_dev_open,
1834                 vnic_dev_open_done, 0);
1835         if (err)
1836                 dev_err(enic_get_dev(enic), "vNIC device open failed, err %d\n",
1837                         err);
1838
1839         return err;
1840 }
1841
1842 static int enic_dev_hang_reset(struct enic *enic)
1843 {
1844         int err;
1845
1846         err = enic_dev_wait(enic->vdev, vnic_dev_hang_reset,
1847                 vnic_dev_hang_reset_done, 0);
1848         if (err)
1849                 netdev_err(enic->netdev, "vNIC hang reset failed, err %d\n",
1850                         err);
1851
1852         return err;
1853 }
1854
1855 static int enic_set_rsskey(struct enic *enic)
1856 {
1857         dma_addr_t rss_key_buf_pa;
1858         union vnic_rss_key *rss_key_buf_va = NULL;
1859         union vnic_rss_key rss_key = {
1860                 .key[0].b = {85, 67, 83, 97, 119, 101, 115, 111, 109, 101},
1861                 .key[1].b = {80, 65, 76, 79, 117, 110, 105, 113, 117, 101},
1862                 .key[2].b = {76, 73, 78, 85, 88, 114, 111, 99, 107, 115},
1863                 .key[3].b = {69, 78, 73, 67, 105, 115, 99, 111, 111, 108},
1864         };
1865         int err;
1866
1867         rss_key_buf_va = pci_alloc_consistent(enic->pdev,
1868                 sizeof(union vnic_rss_key), &rss_key_buf_pa);
1869         if (!rss_key_buf_va)
1870                 return -ENOMEM;
1871
1872         memcpy(rss_key_buf_va, &rss_key, sizeof(union vnic_rss_key));
1873
1874         spin_lock(&enic->devcmd_lock);
1875         err = enic_set_rss_key(enic,
1876                 rss_key_buf_pa,
1877                 sizeof(union vnic_rss_key));
1878         spin_unlock(&enic->devcmd_lock);
1879
1880         pci_free_consistent(enic->pdev, sizeof(union vnic_rss_key),
1881                 rss_key_buf_va, rss_key_buf_pa);
1882
1883         return err;
1884 }
1885
1886 static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits)
1887 {
1888         dma_addr_t rss_cpu_buf_pa;
1889         union vnic_rss_cpu *rss_cpu_buf_va = NULL;
1890         unsigned int i;
1891         int err;
1892
1893         rss_cpu_buf_va = pci_alloc_consistent(enic->pdev,
1894                 sizeof(union vnic_rss_cpu), &rss_cpu_buf_pa);
1895         if (!rss_cpu_buf_va)
1896                 return -ENOMEM;
1897
1898         for (i = 0; i < (1 << rss_hash_bits); i++)
1899                 (*rss_cpu_buf_va).cpu[i/4].b[i%4] = i % enic->rq_count;
1900
1901         spin_lock(&enic->devcmd_lock);
1902         err = enic_set_rss_cpu(enic,
1903                 rss_cpu_buf_pa,
1904                 sizeof(union vnic_rss_cpu));
1905         spin_unlock(&enic->devcmd_lock);
1906
1907         pci_free_consistent(enic->pdev, sizeof(union vnic_rss_cpu),
1908                 rss_cpu_buf_va, rss_cpu_buf_pa);
1909
1910         return err;
1911 }
1912
1913 static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu,
1914         u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable)
1915 {
1916         const u8 tso_ipid_split_en = 0;
1917         const u8 ig_vlan_strip_en = 1;
1918         int err;
1919
1920         /* Enable VLAN tag stripping.
1921         */
1922
1923         spin_lock(&enic->devcmd_lock);
1924         err = enic_set_nic_cfg(enic,
1925                 rss_default_cpu, rss_hash_type,
1926                 rss_hash_bits, rss_base_cpu,
1927                 rss_enable, tso_ipid_split_en,
1928                 ig_vlan_strip_en);
1929         spin_unlock(&enic->devcmd_lock);
1930
1931         return err;
1932 }
1933
1934 static int enic_set_rss_nic_cfg(struct enic *enic)
1935 {
1936         struct device *dev = enic_get_dev(enic);
1937         const u8 rss_default_cpu = 0;
1938         const u8 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 |
1939                 NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 |
1940                 NIC_CFG_RSS_HASH_TYPE_IPV6 |
1941                 NIC_CFG_RSS_HASH_TYPE_TCP_IPV6;
1942         const u8 rss_hash_bits = 7;
1943         const u8 rss_base_cpu = 0;
1944         u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1);
1945
1946         if (rss_enable) {
1947                 if (!enic_set_rsskey(enic)) {
1948                         if (enic_set_rsscpu(enic, rss_hash_bits)) {
1949                                 rss_enable = 0;
1950                                 dev_warn(dev, "RSS disabled, "
1951                                         "Failed to set RSS cpu indirection table.");
1952                         }
1953                 } else {
1954                         rss_enable = 0;
1955                         dev_warn(dev, "RSS disabled, Failed to set RSS key.\n");
1956                 }
1957         }
1958
1959         return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type,
1960                 rss_hash_bits, rss_base_cpu, rss_enable);
1961 }
1962
1963 static void enic_reset(struct work_struct *work)
1964 {
1965         struct enic *enic = container_of(work, struct enic, reset);
1966
1967         if (!netif_running(enic->netdev))
1968                 return;
1969
1970         rtnl_lock();
1971
1972         enic_dev_hang_notify(enic);
1973         enic_stop(enic->netdev);
1974         enic_dev_hang_reset(enic);
1975         enic_reset_addr_lists(enic);
1976         enic_init_vnic_resources(enic);
1977         enic_set_rss_nic_cfg(enic);
1978         enic_dev_set_ig_vlan_rewrite_mode(enic);
1979         enic_open(enic->netdev);
1980
1981         rtnl_unlock();
1982 }
1983
1984 static int enic_set_intr_mode(struct enic *enic)
1985 {
1986         unsigned int n = min_t(unsigned int, enic->rq_count, ENIC_RQ_MAX);
1987         unsigned int m = min_t(unsigned int, enic->wq_count, ENIC_WQ_MAX);
1988         unsigned int i;
1989
1990         /* Set interrupt mode (INTx, MSI, MSI-X) depending
1991          * on system capabilities.
1992          *
1993          * Try MSI-X first
1994          *
1995          * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs
1996          * (the second to last INTR is used for WQ/RQ errors)
1997          * (the last INTR is used for notifications)
1998          */
1999
2000         BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2);
2001         for (i = 0; i < n + m + 2; i++)
2002                 enic->msix_entry[i].entry = i;
2003
2004         /* Use multiple RQs if RSS is enabled
2005          */
2006
2007         if (ENIC_SETTING(enic, RSS) &&
2008             enic->config.intr_mode < 1 &&
2009             enic->rq_count >= n &&
2010             enic->wq_count >= m &&
2011             enic->cq_count >= n + m &&
2012             enic->intr_count >= n + m + 2) {
2013
2014                 if (!pci_enable_msix(enic->pdev, enic->msix_entry, n + m + 2)) {
2015
2016                         enic->rq_count = n;
2017                         enic->wq_count = m;
2018                         enic->cq_count = n + m;
2019                         enic->intr_count = n + m + 2;
2020
2021                         vnic_dev_set_intr_mode(enic->vdev,
2022                                 VNIC_DEV_INTR_MODE_MSIX);
2023
2024                         return 0;
2025                 }
2026         }
2027
2028         if (enic->config.intr_mode < 1 &&
2029             enic->rq_count >= 1 &&
2030             enic->wq_count >= m &&
2031             enic->cq_count >= 1 + m &&
2032             enic->intr_count >= 1 + m + 2) {
2033                 if (!pci_enable_msix(enic->pdev, enic->msix_entry, 1 + m + 2)) {
2034
2035                         enic->rq_count = 1;
2036                         enic->wq_count = m;
2037                         enic->cq_count = 1 + m;
2038                         enic->intr_count = 1 + m + 2;
2039
2040                         vnic_dev_set_intr_mode(enic->vdev,
2041                                 VNIC_DEV_INTR_MODE_MSIX);
2042
2043                         return 0;
2044                 }
2045         }
2046
2047         /* Next try MSI
2048          *
2049          * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR
2050          */
2051
2052         if (enic->config.intr_mode < 2 &&
2053             enic->rq_count >= 1 &&
2054             enic->wq_count >= 1 &&
2055             enic->cq_count >= 2 &&
2056             enic->intr_count >= 1 &&
2057             !pci_enable_msi(enic->pdev)) {
2058
2059                 enic->rq_count = 1;
2060                 enic->wq_count = 1;
2061                 enic->cq_count = 2;
2062                 enic->intr_count = 1;
2063
2064                 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI);
2065
2066                 return 0;
2067         }
2068
2069         /* Next try INTx
2070          *
2071          * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs
2072          * (the first INTR is used for WQ/RQ)
2073          * (the second INTR is used for WQ/RQ errors)
2074          * (the last INTR is used for notifications)
2075          */
2076
2077         if (enic->config.intr_mode < 3 &&
2078             enic->rq_count >= 1 &&
2079             enic->wq_count >= 1 &&
2080             enic->cq_count >= 2 &&
2081             enic->intr_count >= 3) {
2082
2083                 enic->rq_count = 1;
2084                 enic->wq_count = 1;
2085                 enic->cq_count = 2;
2086                 enic->intr_count = 3;
2087
2088                 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX);
2089
2090                 return 0;
2091         }
2092
2093         vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2094
2095         return -EINVAL;
2096 }
2097
2098 static void enic_clear_intr_mode(struct enic *enic)
2099 {
2100         switch (vnic_dev_get_intr_mode(enic->vdev)) {
2101         case VNIC_DEV_INTR_MODE_MSIX:
2102                 pci_disable_msix(enic->pdev);
2103                 break;
2104         case VNIC_DEV_INTR_MODE_MSI:
2105                 pci_disable_msi(enic->pdev);
2106                 break;
2107         default:
2108                 break;
2109         }
2110
2111         vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2112 }
2113
2114 static const struct net_device_ops enic_netdev_dynamic_ops = {
2115         .ndo_open               = enic_open,
2116         .ndo_stop               = enic_stop,
2117         .ndo_start_xmit         = enic_hard_start_xmit,
2118         .ndo_get_stats          = enic_get_stats,
2119         .ndo_validate_addr      = eth_validate_addr,
2120         .ndo_set_rx_mode        = enic_set_rx_mode,
2121         .ndo_set_multicast_list = enic_set_rx_mode,
2122         .ndo_set_mac_address    = enic_set_mac_address_dynamic,
2123         .ndo_change_mtu         = enic_change_mtu,
2124         .ndo_vlan_rx_register   = enic_vlan_rx_register,
2125         .ndo_vlan_rx_add_vid    = enic_vlan_rx_add_vid,
2126         .ndo_vlan_rx_kill_vid   = enic_vlan_rx_kill_vid,
2127         .ndo_tx_timeout         = enic_tx_timeout,
2128         .ndo_set_vf_port        = enic_set_vf_port,
2129         .ndo_get_vf_port        = enic_get_vf_port,
2130         .ndo_set_vf_mac         = enic_set_vf_mac,
2131 #ifdef CONFIG_NET_POLL_CONTROLLER
2132         .ndo_poll_controller    = enic_poll_controller,
2133 #endif
2134 };
2135
2136 static const struct net_device_ops enic_netdev_ops = {
2137         .ndo_open               = enic_open,
2138         .ndo_stop               = enic_stop,
2139         .ndo_start_xmit         = enic_hard_start_xmit,
2140         .ndo_get_stats          = enic_get_stats,
2141         .ndo_validate_addr      = eth_validate_addr,
2142         .ndo_set_mac_address    = enic_set_mac_address,
2143         .ndo_set_rx_mode        = enic_set_rx_mode,
2144         .ndo_set_multicast_list = enic_set_rx_mode,
2145         .ndo_change_mtu         = enic_change_mtu,
2146         .ndo_vlan_rx_register   = enic_vlan_rx_register,
2147         .ndo_vlan_rx_add_vid    = enic_vlan_rx_add_vid,
2148         .ndo_vlan_rx_kill_vid   = enic_vlan_rx_kill_vid,
2149         .ndo_tx_timeout         = enic_tx_timeout,
2150 #ifdef CONFIG_NET_POLL_CONTROLLER
2151         .ndo_poll_controller    = enic_poll_controller,
2152 #endif
2153 };
2154
2155 static void enic_dev_deinit(struct enic *enic)
2156 {
2157         unsigned int i;
2158
2159         for (i = 0; i < enic->rq_count; i++)
2160                 netif_napi_del(&enic->napi[i]);
2161
2162         enic_free_vnic_resources(enic);
2163         enic_clear_intr_mode(enic);
2164 }
2165
2166 static int enic_dev_init(struct enic *enic)
2167 {
2168         struct device *dev = enic_get_dev(enic);
2169         struct net_device *netdev = enic->netdev;
2170         unsigned int i;
2171         int err;
2172
2173         /* Get vNIC configuration
2174          */
2175
2176         err = enic_get_vnic_config(enic);
2177         if (err) {
2178                 dev_err(dev, "Get vNIC configuration failed, aborting\n");
2179                 return err;
2180         }
2181
2182         /* Get available resource counts
2183          */
2184
2185         enic_get_res_counts(enic);
2186
2187         /* Set interrupt mode based on resource counts and system
2188          * capabilities
2189          */
2190
2191         err = enic_set_intr_mode(enic);
2192         if (err) {
2193                 dev_err(dev, "Failed to set intr mode based on resource "
2194                         "counts and system capabilities, aborting\n");
2195                 return err;
2196         }
2197
2198         /* Allocate and configure vNIC resources
2199          */
2200
2201         err = enic_alloc_vnic_resources(enic);
2202         if (err) {
2203                 dev_err(dev, "Failed to alloc vNIC resources, aborting\n");
2204                 goto err_out_free_vnic_resources;
2205         }
2206
2207         enic_init_vnic_resources(enic);
2208
2209         err = enic_set_rss_nic_cfg(enic);
2210         if (err) {
2211                 dev_err(dev, "Failed to config nic, aborting\n");
2212                 goto err_out_free_vnic_resources;
2213         }
2214
2215         switch (vnic_dev_get_intr_mode(enic->vdev)) {
2216         default:
2217                 netif_napi_add(netdev, &enic->napi[0], enic_poll, 64);
2218                 break;
2219         case VNIC_DEV_INTR_MODE_MSIX:
2220                 for (i = 0; i < enic->rq_count; i++)
2221                         netif_napi_add(netdev, &enic->napi[i],
2222                                 enic_poll_msix, 64);
2223                 break;
2224         }
2225
2226         return 0;
2227
2228 err_out_free_vnic_resources:
2229         enic_clear_intr_mode(enic);
2230         enic_free_vnic_resources(enic);
2231
2232         return err;
2233 }
2234
2235 static void enic_iounmap(struct enic *enic)
2236 {
2237         unsigned int i;
2238
2239         for (i = 0; i < ARRAY_SIZE(enic->bar); i++)
2240                 if (enic->bar[i].vaddr)
2241                         iounmap(enic->bar[i].vaddr);
2242 }
2243
2244 static int __devinit enic_probe(struct pci_dev *pdev,
2245         const struct pci_device_id *ent)
2246 {
2247         struct device *dev = &pdev->dev;
2248         struct net_device *netdev;
2249         struct enic *enic;
2250         int using_dac = 0;
2251         unsigned int i;
2252         int err;
2253
2254         /* Allocate net device structure and initialize.  Private
2255          * instance data is initialized to zero.
2256          */
2257
2258         netdev = alloc_etherdev(sizeof(struct enic));
2259         if (!netdev) {
2260                 pr_err("Etherdev alloc failed, aborting\n");
2261                 return -ENOMEM;
2262         }
2263
2264         pci_set_drvdata(pdev, netdev);
2265
2266         SET_NETDEV_DEV(netdev, &pdev->dev);
2267
2268         enic = netdev_priv(netdev);
2269         enic->netdev = netdev;
2270         enic->pdev = pdev;
2271
2272         /* Setup PCI resources
2273          */
2274
2275         err = pci_enable_device_mem(pdev);
2276         if (err) {
2277                 dev_err(dev, "Cannot enable PCI device, aborting\n");
2278                 goto err_out_free_netdev;
2279         }
2280
2281         err = pci_request_regions(pdev, DRV_NAME);
2282         if (err) {
2283                 dev_err(dev, "Cannot request PCI regions, aborting\n");
2284                 goto err_out_disable_device;
2285         }
2286
2287         pci_set_master(pdev);
2288
2289         /* Query PCI controller on system for DMA addressing
2290          * limitation for the device.  Try 40-bit first, and
2291          * fail to 32-bit.
2292          */
2293
2294         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(40));
2295         if (err) {
2296                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2297                 if (err) {
2298                         dev_err(dev, "No usable DMA configuration, aborting\n");
2299                         goto err_out_release_regions;
2300                 }
2301                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
2302                 if (err) {
2303                         dev_err(dev, "Unable to obtain %u-bit DMA "
2304                                 "for consistent allocations, aborting\n", 32);
2305                         goto err_out_release_regions;
2306                 }
2307         } else {
2308                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(40));
2309                 if (err) {
2310                         dev_err(dev, "Unable to obtain %u-bit DMA "
2311                                 "for consistent allocations, aborting\n", 40);
2312                         goto err_out_release_regions;
2313                 }
2314                 using_dac = 1;
2315         }
2316
2317         /* Map vNIC resources from BAR0-5
2318          */
2319
2320         for (i = 0; i < ARRAY_SIZE(enic->bar); i++) {
2321                 if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
2322                         continue;
2323                 enic->bar[i].len = pci_resource_len(pdev, i);
2324                 enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len);
2325                 if (!enic->bar[i].vaddr) {
2326                         dev_err(dev, "Cannot memory-map BAR %d, aborting\n", i);
2327                         err = -ENODEV;
2328                         goto err_out_iounmap;
2329                 }
2330                 enic->bar[i].bus_addr = pci_resource_start(pdev, i);
2331         }
2332
2333         /* Register vNIC device
2334          */
2335
2336         enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar,
2337                 ARRAY_SIZE(enic->bar));
2338         if (!enic->vdev) {
2339                 dev_err(dev, "vNIC registration failed, aborting\n");
2340                 err = -ENODEV;
2341                 goto err_out_iounmap;
2342         }
2343
2344         /* Issue device open to get device in known state
2345          */
2346
2347         err = enic_dev_open(enic);
2348         if (err) {
2349                 dev_err(dev, "vNIC dev open failed, aborting\n");
2350                 goto err_out_vnic_unregister;
2351         }
2352
2353         /* Setup devcmd lock
2354          */
2355
2356         spin_lock_init(&enic->devcmd_lock);
2357
2358         /*
2359          * Set ingress vlan rewrite mode before vnic initialization
2360          */
2361
2362         err = enic_dev_set_ig_vlan_rewrite_mode(enic);
2363         if (err) {
2364                 dev_err(dev,
2365                         "Failed to set ingress vlan rewrite mode, aborting.\n");
2366                 goto err_out_dev_close;
2367         }
2368
2369         /* Issue device init to initialize the vnic-to-switch link.
2370          * We'll start with carrier off and wait for link UP
2371          * notification later to turn on carrier.  We don't need
2372          * to wait here for the vnic-to-switch link initialization
2373          * to complete; link UP notification is the indication that
2374          * the process is complete.
2375          */
2376
2377         netif_carrier_off(netdev);
2378
2379         /* Do not call dev_init for a dynamic vnic.
2380          * For a dynamic vnic, init_prov_info will be
2381          * called later by an upper layer.
2382          */
2383
2384         if (!enic_is_dynamic(enic)) {
2385                 err = vnic_dev_init(enic->vdev, 0);
2386                 if (err) {
2387                         dev_err(dev, "vNIC dev init failed, aborting\n");
2388                         goto err_out_dev_close;
2389                 }
2390         }
2391
2392         err = enic_dev_init(enic);
2393         if (err) {
2394                 dev_err(dev, "Device initialization failed, aborting\n");
2395                 goto err_out_dev_close;
2396         }
2397
2398         /* Setup notification timer, HW reset task, and wq locks
2399          */
2400
2401         init_timer(&enic->notify_timer);
2402         enic->notify_timer.function = enic_notify_timer;
2403         enic->notify_timer.data = (unsigned long)enic;
2404
2405         INIT_WORK(&enic->reset, enic_reset);
2406
2407         for (i = 0; i < enic->wq_count; i++)
2408                 spin_lock_init(&enic->wq_lock[i]);
2409
2410         /* Register net device
2411          */
2412
2413         enic->port_mtu = enic->config.mtu;
2414         (void)enic_change_mtu(netdev, enic->port_mtu);
2415
2416         err = enic_set_mac_addr(netdev, enic->mac_addr);
2417         if (err) {
2418                 dev_err(dev, "Invalid MAC address, aborting\n");
2419                 goto err_out_dev_deinit;
2420         }
2421
2422         enic->tx_coalesce_usecs = enic->config.intr_timer_usec;
2423         enic->rx_coalesce_usecs = enic->tx_coalesce_usecs;
2424
2425         if (enic_is_dynamic(enic))
2426                 netdev->netdev_ops = &enic_netdev_dynamic_ops;
2427         else
2428                 netdev->netdev_ops = &enic_netdev_ops;
2429
2430         netdev->watchdog_timeo = 2 * HZ;
2431         netdev->ethtool_ops = &enic_ethtool_ops;
2432
2433         netdev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
2434         if (ENIC_SETTING(enic, LOOP)) {
2435                 netdev->features &= ~NETIF_F_HW_VLAN_TX;
2436                 enic->loop_enable = 1;
2437                 enic->loop_tag = enic->config.loop_tag;
2438                 dev_info(dev, "loopback tag=0x%04x\n", enic->loop_tag);
2439         }
2440         if (ENIC_SETTING(enic, TXCSUM))
2441                 netdev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
2442         if (ENIC_SETTING(enic, TSO))
2443                 netdev->features |= NETIF_F_TSO |
2444                         NETIF_F_TSO6 | NETIF_F_TSO_ECN;
2445         if (ENIC_SETTING(enic, LRO))
2446                 netdev->features |= NETIF_F_GRO;
2447         if (using_dac)
2448                 netdev->features |= NETIF_F_HIGHDMA;
2449
2450         enic->csum_rx_enabled = ENIC_SETTING(enic, RXCSUM);
2451
2452         err = register_netdev(netdev);
2453         if (err) {
2454                 dev_err(dev, "Cannot register net device, aborting\n");
2455                 goto err_out_dev_deinit;
2456         }
2457
2458         return 0;
2459
2460 err_out_dev_deinit:
2461         enic_dev_deinit(enic);
2462 err_out_dev_close:
2463         vnic_dev_close(enic->vdev);
2464 err_out_vnic_unregister:
2465         vnic_dev_unregister(enic->vdev);
2466 err_out_iounmap:
2467         enic_iounmap(enic);
2468 err_out_release_regions:
2469         pci_release_regions(pdev);
2470 err_out_disable_device:
2471         pci_disable_device(pdev);
2472 err_out_free_netdev:
2473         pci_set_drvdata(pdev, NULL);
2474         free_netdev(netdev);
2475
2476         return err;
2477 }
2478
2479 static void __devexit enic_remove(struct pci_dev *pdev)
2480 {
2481         struct net_device *netdev = pci_get_drvdata(pdev);
2482
2483         if (netdev) {
2484                 struct enic *enic = netdev_priv(netdev);
2485
2486                 cancel_work_sync(&enic->reset);
2487                 unregister_netdev(netdev);
2488                 enic_dev_deinit(enic);
2489                 vnic_dev_close(enic->vdev);
2490                 vnic_dev_unregister(enic->vdev);
2491                 enic_iounmap(enic);
2492                 pci_release_regions(pdev);
2493                 pci_disable_device(pdev);
2494                 pci_set_drvdata(pdev, NULL);
2495                 free_netdev(netdev);
2496         }
2497 }
2498
2499 static struct pci_driver enic_driver = {
2500         .name = DRV_NAME,
2501         .id_table = enic_id_table,
2502         .probe = enic_probe,
2503         .remove = __devexit_p(enic_remove),
2504 };
2505
2506 static int __init enic_init_module(void)
2507 {
2508         pr_info("%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
2509
2510         return pci_register_driver(&enic_driver);
2511 }
2512
2513 static void __exit enic_cleanup_module(void)
2514 {
2515         pci_unregister_driver(&enic_driver);
2516 }
2517
2518 module_init(enic_init_module);
2519 module_exit(enic_cleanup_module);