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
  48 #define ENIC_NOTIFY_TIMER_PERIOD        (2 * HZ)
  49 #define WQ_ENET_MAX_DESC_LEN            (1 << WQ_ENET_LEN_BITS)
  50 #define MAX_TSO                         (1 << 16)
  51 #define ENIC_DESC_MAX_SPLITS            (MAX_TSO / WQ_ENET_MAX_DESC_LEN + 1)
  52
  53 #define PCI_DEVICE_ID_CISCO_VIC_ENET         0x0043  /* ethernet vnic */
  54 #define PCI_DEVICE_ID_CISCO_VIC_ENET_DYN     0x0044  /* enet dynamic vnic */
  55
  56 /* Supported devices */
  57 static DEFINE_PCI_DEVICE_TABLE(enic_id_table) = {
  58         { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET) },
  59         { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_DYN) },
  60         { 0, }  /* end of table */
  61 };
  62
  63 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  64 MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>");
  65 MODULE_LICENSE("GPL");
  66 MODULE_VERSION(DRV_VERSION);
  67 MODULE_DEVICE_TABLE(pci, enic_id_table);
  68
  69 struct enic_stat {
  70         char name[ETH_GSTRING_LEN];
  71         unsigned int offset;
  72 };
  73
  74 #define ENIC_TX_STAT(stat)      \
  75         { .name = #stat, .offset = offsetof(struct vnic_tx_stats, stat) / 8 }
  76 #define ENIC_RX_STAT(stat)      \
  77         { .name = #stat, .offset = offsetof(struct vnic_rx_stats, stat) / 8 }
  78
  79 static const struct enic_stat enic_tx_stats[] = {
  80         ENIC_TX_STAT(tx_frames_ok),
  81         ENIC_TX_STAT(tx_unicast_frames_ok),
  82         ENIC_TX_STAT(tx_multicast_frames_ok),
  83         ENIC_TX_STAT(tx_broadcast_frames_ok),
  84         ENIC_TX_STAT(tx_bytes_ok),
  85         ENIC_TX_STAT(tx_unicast_bytes_ok),
  86         ENIC_TX_STAT(tx_multicast_bytes_ok),
  87         ENIC_TX_STAT(tx_broadcast_bytes_ok),
  88         ENIC_TX_STAT(tx_drops),
  89         ENIC_TX_STAT(tx_errors),
  90         ENIC_TX_STAT(tx_tso),
  91 };
  92
  93 static const struct enic_stat enic_rx_stats[] = {
  94         ENIC_RX_STAT(rx_frames_ok),
  95         ENIC_RX_STAT(rx_frames_total),
  96         ENIC_RX_STAT(rx_unicast_frames_ok),
  97         ENIC_RX_STAT(rx_multicast_frames_ok),
  98         ENIC_RX_STAT(rx_broadcast_frames_ok),
  99         ENIC_RX_STAT(rx_bytes_ok),
 100         ENIC_RX_STAT(rx_unicast_bytes_ok),
 101         ENIC_RX_STAT(rx_multicast_bytes_ok),
 102         ENIC_RX_STAT(rx_broadcast_bytes_ok),
 103         ENIC_RX_STAT(rx_drop),
 104         ENIC_RX_STAT(rx_no_bufs),
 105         ENIC_RX_STAT(rx_errors),
 106         ENIC_RX_STAT(rx_rss),
 107         ENIC_RX_STAT(rx_crc_errors),
 108         ENIC_RX_STAT(rx_frames_64),
 109         ENIC_RX_STAT(rx_frames_127),
 110         ENIC_RX_STAT(rx_frames_255),
 111         ENIC_RX_STAT(rx_frames_511),
 112         ENIC_RX_STAT(rx_frames_1023),
 113         ENIC_RX_STAT(rx_frames_1518),
 114         ENIC_RX_STAT(rx_frames_to_max),
 115 };
 116
 117 static const unsigned int enic_n_tx_stats = ARRAY_SIZE(enic_tx_stats);
 118 static const unsigned int enic_n_rx_stats = ARRAY_SIZE(enic_rx_stats);
 119
 120 static int enic_is_dynamic(struct enic *enic)
 121 {
 122         return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_DYN;
 123 }
 124
 125 static inline unsigned int enic_cq_rq(struct enic *enic, unsigned int rq)
 126 {
 127         return rq;
 128 }
 129
 130 static inline unsigned int enic_cq_wq(struct enic *enic, unsigned int wq)
 131 {
 132         return enic->rq_count + wq;
 133 }
 134
 135 static inline unsigned int enic_legacy_io_intr(void)
 136 {
 137         return 0;
 138 }
 139
 140 static inline unsigned int enic_legacy_err_intr(void)
 141 {
 142         return 1;
 143 }
 144
 145 static inline unsigned int enic_legacy_notify_intr(void)
 146 {
 147         return 2;
 148 }
 149
 150 static inline unsigned int enic_msix_rq_intr(struct enic *enic, unsigned int rq)
 151 {
 152         return rq;
 153 }
 154
 155 static inline unsigned int enic_msix_wq_intr(struct enic *enic, unsigned int wq)
 156 {
 157         return enic->rq_count + wq;
 158 }
 159
 160 static inline unsigned int enic_msix_err_intr(struct enic *enic)
 161 {
 162         return enic->rq_count + enic->wq_count;
 163 }
 164
 165 static inline unsigned int enic_msix_notify_intr(struct enic *enic)
 166 {
 167         return enic->rq_count + enic->wq_count + 1;
 168 }
 169
 170 static int enic_get_settings(struct net_device *netdev,
 171         struct ethtool_cmd *ecmd)
 172 {
 173         struct enic *enic = netdev_priv(netdev);
 174
 175         ecmd->supported = (SUPPORTED_10000baseT_Full | SUPPORTED_FIBRE);
 176         ecmd->advertising = (ADVERTISED_10000baseT_Full | ADVERTISED_FIBRE);
 177         ecmd->port = PORT_FIBRE;
 178         ecmd->transceiver = XCVR_EXTERNAL;
 179
 180         if (netif_carrier_ok(netdev)) {
 181                 ecmd->speed = vnic_dev_port_speed(enic->vdev);
 182                 ecmd->duplex = DUPLEX_FULL;
 183         } else {
 184                 ecmd->speed = -1;
 185                 ecmd->duplex = -1;
 186         }
 187
 188         ecmd->autoneg = AUTONEG_DISABLE;
 189
 190         return 0;
 191 }
 192
 193 static int enic_dev_fw_info(struct enic *enic,
 194         struct vnic_devcmd_fw_info **fw_info)
 195 {
 196         int err;
 197
 198         spin_lock(&enic->devcmd_lock);
 199         err = vnic_dev_fw_info(enic->vdev, fw_info);
 200         spin_unlock(&enic->devcmd_lock);
 201
 202         return err;
 203 }
 204
 205 static void enic_get_drvinfo(struct net_device *netdev,
 206         struct ethtool_drvinfo *drvinfo)
 207 {
 208         struct enic *enic = netdev_priv(netdev);
 209         struct vnic_devcmd_fw_info *fw_info;
 210
 211         enic_dev_fw_info(enic, &fw_info);
 212
 213         strncpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
 214         strncpy(drvinfo->version, DRV_VERSION, sizeof(drvinfo->version));
 215         strncpy(drvinfo->fw_version, fw_info->fw_version,
 216                 sizeof(drvinfo->fw_version));
 217         strncpy(drvinfo->bus_info, pci_name(enic->pdev),
 218                 sizeof(drvinfo->bus_info));
 219 }
 220
 221 static void enic_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
 222 {
 223         unsigned int i;
 224
 225         switch (stringset) {
 226         case ETH_SS_STATS:
 227                 for (i = 0; i < enic_n_tx_stats; i++) {
 228                         memcpy(data, enic_tx_stats[i].name, ETH_GSTRING_LEN);
 229                         data += ETH_GSTRING_LEN;
 230                 }
 231                 for (i = 0; i < enic_n_rx_stats; i++) {
 232                         memcpy(data, enic_rx_stats[i].name, ETH_GSTRING_LEN);
 233                         data += ETH_GSTRING_LEN;
 234                 }
 235                 break;
 236         }
 237 }
 238
 239 static int enic_get_sset_count(struct net_device *netdev, int sset)
 240 {
 241         switch (sset) {
 242         case ETH_SS_STATS:
 243                 return enic_n_tx_stats + enic_n_rx_stats;
 244         default:
 245                 return -EOPNOTSUPP;
 246         }
 247 }
 248
 249 static int enic_dev_stats_dump(struct enic *enic, struct vnic_stats **vstats)
 250 {
 251         int err;
 252
 253         spin_lock(&enic->devcmd_lock);
 254         err = vnic_dev_stats_dump(enic->vdev, vstats);
 255         spin_unlock(&enic->devcmd_lock);
 256
 257         return err;
 258 }
 259
 260 static void enic_get_ethtool_stats(struct net_device *netdev,
 261         struct ethtool_stats *stats, u64 *data)
 262 {
 263         struct enic *enic = netdev_priv(netdev);
 264         struct vnic_stats *vstats;
 265         unsigned int i;
 266
 267         enic_dev_stats_dump(enic, &vstats);
 268
 269         for (i = 0; i < enic_n_tx_stats; i++)
 270                 *(data++) = ((u64 *)&vstats->tx)[enic_tx_stats[i].offset];
 271         for (i = 0; i < enic_n_rx_stats; i++)
 272                 *(data++) = ((u64 *)&vstats->rx)[enic_rx_stats[i].offset];
 273 }
 274
 275 static u32 enic_get_rx_csum(struct net_device *netdev)
 276 {
 277         struct enic *enic = netdev_priv(netdev);
 278         return enic->csum_rx_enabled;
 279 }
 280
 281 static int enic_set_rx_csum(struct net_device *netdev, u32 data)
 282 {
 283         struct enic *enic = netdev_priv(netdev);
 284
 285         if (data && !ENIC_SETTING(enic, RXCSUM))
 286                 return -EINVAL;
 287
 288         enic->csum_rx_enabled = !!data;
 289
 290         return 0;
 291 }
 292
 293 static int enic_set_tx_csum(struct net_device *netdev, u32 data)
 294 {
 295         struct enic *enic = netdev_priv(netdev);
 296
 297         if (data && !ENIC_SETTING(enic, TXCSUM))
 298                 return -EINVAL;
 299
 300         if (data)
 301                 netdev->features |= NETIF_F_HW_CSUM;
 302         else
 303                 netdev->features &= ~NETIF_F_HW_CSUM;
 304
 305         return 0;
 306 }
 307
 308 static int enic_set_tso(struct net_device *netdev, u32 data)
 309 {
 310         struct enic *enic = netdev_priv(netdev);
 311
 312         if (data && !ENIC_SETTING(enic, TSO))
 313                 return -EINVAL;
 314
 315         if (data)
 316                 netdev->features |=
 317                         NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN;
 318         else
 319                 netdev->features &=
 320                         ~(NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN);
 321
 322         return 0;
 323 }
 324
 325 static u32 enic_get_msglevel(struct net_device *netdev)
 326 {
 327         struct enic *enic = netdev_priv(netdev);
 328         return enic->msg_enable;
 329 }
 330
 331 static void enic_set_msglevel(struct net_device *netdev, u32 value)
 332 {
 333         struct enic *enic = netdev_priv(netdev);
 334         enic->msg_enable = value;
 335 }
 336
 337 static int enic_get_coalesce(struct net_device *netdev,
 338         struct ethtool_coalesce *ecmd)
 339 {
 340         struct enic *enic = netdev_priv(netdev);
 341
 342         ecmd->tx_coalesce_usecs = enic->tx_coalesce_usecs;
 343         ecmd->rx_coalesce_usecs = enic->rx_coalesce_usecs;
 344
 345         return 0;
 346 }
 347
 348 static int enic_set_coalesce(struct net_device *netdev,
 349         struct ethtool_coalesce *ecmd)
 350 {
 351         struct enic *enic = netdev_priv(netdev);
 352         u32 tx_coalesce_usecs;
 353         u32 rx_coalesce_usecs;
 354         unsigned int i, intr;
 355
 356         tx_coalesce_usecs = min_t(u32,
 357                 INTR_COALESCE_HW_TO_USEC(VNIC_INTR_TIMER_MAX),
 358                 ecmd->tx_coalesce_usecs);
 359         rx_coalesce_usecs = min_t(u32,
 360                 INTR_COALESCE_HW_TO_USEC(VNIC_INTR_TIMER_MAX),
 361                 ecmd->rx_coalesce_usecs);
 362
 363         switch (vnic_dev_get_intr_mode(enic->vdev)) {
 364         case VNIC_DEV_INTR_MODE_INTX:
 365                 if (tx_coalesce_usecs != rx_coalesce_usecs)
 366                         return -EINVAL;
 367
 368                 intr = enic_legacy_io_intr();
 369                 vnic_intr_coalescing_timer_set(&enic->intr[intr],
 370                         INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs));
 371                 break;
 372         case VNIC_DEV_INTR_MODE_MSI:
 373                 if (tx_coalesce_usecs != rx_coalesce_usecs)
 374                         return -EINVAL;
 375
 376                 vnic_intr_coalescing_timer_set(&enic->intr[0],
 377                         INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs));
 378                 break;
 379         case VNIC_DEV_INTR_MODE_MSIX:
 380                 for (i = 0; i < enic->wq_count; i++) {
 381                         intr = enic_msix_wq_intr(enic, i);
 382                         vnic_intr_coalescing_timer_set(&enic->intr[intr],
 383                                 INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs));
 384                 }
 385
 386                 for (i = 0; i < enic->rq_count; i++) {
 387                         intr = enic_msix_rq_intr(enic, i);
 388                         vnic_intr_coalescing_timer_set(&enic->intr[intr],
 389                                 INTR_COALESCE_USEC_TO_HW(rx_coalesce_usecs));
 390                 }
 391
 392                 break;
 393         default:
 394                 break;
 395         }
 396
 397         enic->tx_coalesce_usecs = tx_coalesce_usecs;
 398         enic->rx_coalesce_usecs = rx_coalesce_usecs;
 399
 400         return 0;
 401 }
 402
 403 static const struct ethtool_ops enic_ethtool_ops = {
 404         .get_settings = enic_get_settings,
 405         .get_drvinfo = enic_get_drvinfo,
 406         .get_msglevel = enic_get_msglevel,
 407         .set_msglevel = enic_set_msglevel,
 408         .get_link = ethtool_op_get_link,
 409         .get_strings = enic_get_strings,
 410         .get_sset_count = enic_get_sset_count,
 411         .get_ethtool_stats = enic_get_ethtool_stats,
 412         .get_rx_csum = enic_get_rx_csum,
 413         .set_rx_csum = enic_set_rx_csum,
 414         .get_tx_csum = ethtool_op_get_tx_csum,
 415         .set_tx_csum = enic_set_tx_csum,
 416         .get_sg = ethtool_op_get_sg,
 417         .set_sg = ethtool_op_set_sg,
 418         .get_tso = ethtool_op_get_tso,
 419         .set_tso = enic_set_tso,
 420         .get_coalesce = enic_get_coalesce,
 421         .set_coalesce = enic_set_coalesce,
 422         .get_flags = ethtool_op_get_flags,
 423 };
 424
 425 static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
 426 {
 427         struct enic *enic = vnic_dev_priv(wq->vdev);
 428
 429         if (buf->sop)
 430                 pci_unmap_single(enic->pdev, buf->dma_addr,
 431                         buf->len, PCI_DMA_TODEVICE);
 432         else
 433                 pci_unmap_page(enic->pdev, buf->dma_addr,
 434                         buf->len, PCI_DMA_TODEVICE);
 435
 436         if (buf->os_buf)
 437                 dev_kfree_skb_any(buf->os_buf);
 438 }
 439
 440 static void enic_wq_free_buf(struct vnic_wq *wq,
 441         struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque)
 442 {
 443         enic_free_wq_buf(wq, buf);
 444 }
 445
 446 static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
 447         u8 type, u16 q_number, u16 completed_index, void *opaque)
 448 {
 449         struct enic *enic = vnic_dev_priv(vdev);
 450
 451         spin_lock(&enic->wq_lock[q_number]);
 452
 453         vnic_wq_service(&enic->wq[q_number], cq_desc,
 454                 completed_index, enic_wq_free_buf,
 455                 opaque);
 456
 457         if (netif_queue_stopped(enic->netdev) &&
 458             vnic_wq_desc_avail(&enic->wq[q_number]) >=
 459             (MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS))
 460                 netif_wake_queue(enic->netdev);
 461
 462         spin_unlock(&enic->wq_lock[q_number]);
 463
 464         return 0;
 465 }
 466
 467 static void enic_log_q_error(struct enic *enic)
 468 {
 469         unsigned int i;
 470         u32 error_status;
 471
 472         for (i = 0; i < enic->wq_count; i++) {
 473                 error_status = vnic_wq_error_status(&enic->wq[i]);
 474                 if (error_status)
 475                         netdev_err(enic->netdev, "WQ[%d] error_status %d\n",
 476                                 i, error_status);
 477         }
 478
 479         for (i = 0; i < enic->rq_count; i++) {
 480                 error_status = vnic_rq_error_status(&enic->rq[i]);
 481                 if (error_status)
 482                         netdev_err(enic->netdev, "RQ[%d] error_status %d\n",
 483                                 i, error_status);
 484         }
 485 }
 486
 487 static void enic_msglvl_check(struct enic *enic)
 488 {
 489         u32 msg_enable = vnic_dev_msg_lvl(enic->vdev);
 490
 491         if (msg_enable != enic->msg_enable) {
 492                 netdev_info(enic->netdev, "msg lvl changed from 0x%x to 0x%x\n",
 493                         enic->msg_enable, msg_enable);
 494                 enic->msg_enable = msg_enable;
 495         }
 496 }
 497
 498 static void enic_mtu_check(struct enic *enic)
 499 {
 500         u32 mtu = vnic_dev_mtu(enic->vdev);
 501         struct net_device *netdev = enic->netdev;
 502
 503         if (mtu && mtu != enic->port_mtu) {
 504                 enic->port_mtu = mtu;
 505                 if (mtu < netdev->mtu)
 506                         netdev_warn(netdev,
 507                                 "interface MTU (%d) set higher "
 508                                 "than switch port MTU (%d)\n",
 509                                 netdev->mtu, mtu);
 510         }
 511 }
 512
 513 static void enic_link_check(struct enic *enic)
 514 {
 515         int link_status = vnic_dev_link_status(enic->vdev);
 516         int carrier_ok = netif_carrier_ok(enic->netdev);
 517
 518         if (link_status && !carrier_ok) {
 519                 netdev_info(enic->netdev, "Link UP\n");
 520                 netif_carrier_on(enic->netdev);
 521         } else if (!link_status && carrier_ok) {
 522                 netdev_info(enic->netdev, "Link DOWN\n");
 523                 netif_carrier_off(enic->netdev);
 524         }
 525 }
 526
 527 static void enic_notify_check(struct enic *enic)
 528 {
 529         enic_msglvl_check(enic);
 530         enic_mtu_check(enic);
 531         enic_link_check(enic);
 532 }
 533
 534 #define ENIC_TEST_INTR(pba, i) (pba & (1 << i))
 535
 536 static irqreturn_t enic_isr_legacy(int irq, void *data)
 537 {
 538         struct net_device *netdev = data;
 539         struct enic *enic = netdev_priv(netdev);
 540         unsigned int io_intr = enic_legacy_io_intr();
 541         unsigned int err_intr = enic_legacy_err_intr();
 542         unsigned int notify_intr = enic_legacy_notify_intr();
 543         u32 pba;
 544
 545         vnic_intr_mask(&enic->intr[io_intr]);
 546
 547         pba = vnic_intr_legacy_pba(enic->legacy_pba);
 548         if (!pba) {
 549                 vnic_intr_unmask(&enic->intr[io_intr]);
 550                 return IRQ_NONE;        /* not our interrupt */
 551         }
 552
 553         if (ENIC_TEST_INTR(pba, notify_intr)) {
 554                 vnic_intr_return_all_credits(&enic->intr[notify_intr]);
 555                 enic_notify_check(enic);
 556         }
 557
 558         if (ENIC_TEST_INTR(pba, err_intr)) {
 559                 vnic_intr_return_all_credits(&enic->intr[err_intr]);
 560                 enic_log_q_error(enic);
 561                 /* schedule recovery from WQ/RQ error */
 562                 schedule_work(&enic->reset);
 563                 return IRQ_HANDLED;
 564         }
 565
 566         if (ENIC_TEST_INTR(pba, io_intr)) {
 567                 if (napi_schedule_prep(&enic->napi[0]))
 568                         __napi_schedule(&enic->napi[0]);
 569         } else {
 570                 vnic_intr_unmask(&enic->intr[io_intr]);
 571         }
 572
 573         return IRQ_HANDLED;
 574 }
 575
 576 static irqreturn_t enic_isr_msi(int irq, void *data)
 577 {
 578         struct enic *enic = data;
 579
 580         /* With MSI, there is no sharing of interrupts, so this is
 581          * our interrupt and there is no need to ack it.  The device
 582          * is not providing per-vector masking, so the OS will not
 583          * write to PCI config space to mask/unmask the interrupt.
 584          * We're using mask_on_assertion for MSI, so the device
 585          * automatically masks the interrupt when the interrupt is
 586          * generated.  Later, when exiting polling, the interrupt
 587          * will be unmasked (see enic_poll).
 588          *
 589          * Also, the device uses the same PCIe Traffic Class (TC)
 590          * for Memory Write data and MSI, so there are no ordering
 591          * issues; the MSI will always arrive at the Root Complex
 592          * _after_ corresponding Memory Writes (i.e. descriptor
 593          * writes).
 594          */
 595
 596         napi_schedule(&enic->napi[0]);
 597
 598         return IRQ_HANDLED;
 599 }
 600
 601 static irqreturn_t enic_isr_msix_rq(int irq, void *data)
 602 {
 603         struct napi_struct *napi = data;
 604
 605         /* schedule NAPI polling for RQ cleanup */
 606         napi_schedule(napi);
 607
 608         return IRQ_HANDLED;
 609 }
 610
 611 static irqreturn_t enic_isr_msix_wq(int irq, void *data)
 612 {
 613         struct enic *enic = data;
 614         unsigned int cq = enic_cq_wq(enic, 0);
 615         unsigned int intr = enic_msix_wq_intr(enic, 0);
 616         unsigned int wq_work_to_do = -1; /* no limit */
 617         unsigned int wq_work_done;
 618
 619         wq_work_done = vnic_cq_service(&enic->cq[cq],
 620                 wq_work_to_do, enic_wq_service, NULL);
 621
 622         vnic_intr_return_credits(&enic->intr[intr],
 623                 wq_work_done,
 624                 1 /* unmask intr */,
 625                 1 /* reset intr timer */);
 626
 627         return IRQ_HANDLED;
 628 }
 629
 630 static irqreturn_t enic_isr_msix_err(int irq, void *data)
 631 {
 632         struct enic *enic = data;
 633         unsigned int intr = enic_msix_err_intr(enic);
 634
 635         vnic_intr_return_all_credits(&enic->intr[intr]);
 636
 637         enic_log_q_error(enic);
 638
 639         /* schedule recovery from WQ/RQ error */
 640         schedule_work(&enic->reset);
 641
 642         return IRQ_HANDLED;
 643 }
 644
 645 static irqreturn_t enic_isr_msix_notify(int irq, void *data)
 646 {
 647         struct enic *enic = data;
 648         unsigned int intr = enic_msix_notify_intr(enic);
 649
 650         vnic_intr_return_all_credits(&enic->intr[intr]);
 651         enic_notify_check(enic);
 652
 653         return IRQ_HANDLED;
 654 }
 655
 656 static inline void enic_queue_wq_skb_cont(struct enic *enic,
 657         struct vnic_wq *wq, struct sk_buff *skb,
 658         unsigned int len_left, int loopback)
 659 {
 660         skb_frag_t *frag;
 661
 662         /* Queue additional data fragments */
 663         for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
 664                 len_left -= frag->size;
 665                 enic_queue_wq_desc_cont(wq, skb,
 666                         pci_map_page(enic->pdev, frag->page,
 667                                 frag->page_offset, frag->size,
 668                                 PCI_DMA_TODEVICE),
 669                         frag->size,
 670                         (len_left == 0),        /* EOP? */
 671                         loopback);
 672         }
 673 }
 674
 675 static inline void enic_queue_wq_skb_vlan(struct enic *enic,
 676         struct vnic_wq *wq, struct sk_buff *skb,
 677         int vlan_tag_insert, unsigned int vlan_tag, int loopback)
 678 {
 679         unsigned int head_len = skb_headlen(skb);
 680         unsigned int len_left = skb->len - head_len;
 681         int eop = (len_left == 0);
 682
 683         /* Queue the main skb fragment. The fragments are no larger
 684          * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
 685          * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
 686          * per fragment is queued.
 687          */
 688         enic_queue_wq_desc(wq, skb,
 689                 pci_map_single(enic->pdev, skb->data,
 690                         head_len, PCI_DMA_TODEVICE),
 691                 head_len,
 692                 vlan_tag_insert, vlan_tag,
 693                 eop, loopback);
 694
 695         if (!eop)
 696                 enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
 697 }
 698
 699 static inline void enic_queue_wq_skb_csum_l4(struct enic *enic,
 700         struct vnic_wq *wq, struct sk_buff *skb,
 701         int vlan_tag_insert, unsigned int vlan_tag, int loopback)
 702 {
 703         unsigned int head_len = skb_headlen(skb);
 704         unsigned int len_left = skb->len - head_len;
 705         unsigned int hdr_len = skb_transport_offset(skb);
 706         unsigned int csum_offset = hdr_len + skb->csum_offset;
 707         int eop = (len_left == 0);
 708
 709         /* Queue the main skb fragment. The fragments are no larger
 710          * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
 711          * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
 712          * per fragment is queued.
 713          */
 714         enic_queue_wq_desc_csum_l4(wq, skb,
 715                 pci_map_single(enic->pdev, skb->data,
 716                         head_len, PCI_DMA_TODEVICE),
 717                 head_len,
 718                 csum_offset,
 719                 hdr_len,
 720                 vlan_tag_insert, vlan_tag,
 721                 eop, loopback);
 722
 723         if (!eop)
 724                 enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
 725 }
 726
 727 static inline void enic_queue_wq_skb_tso(struct enic *enic,
 728         struct vnic_wq *wq, struct sk_buff *skb, unsigned int mss,
 729         int vlan_tag_insert, unsigned int vlan_tag, int loopback)
 730 {
 731         unsigned int frag_len_left = skb_headlen(skb);
 732         unsigned int len_left = skb->len - frag_len_left;
 733         unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
 734         int eop = (len_left == 0);
 735         unsigned int len;
 736         dma_addr_t dma_addr;
 737         unsigned int offset = 0;
 738         skb_frag_t *frag;
 739
 740         /* Preload TCP csum field with IP pseudo hdr calculated
 741          * with IP length set to zero.  HW will later add in length
 742          * to each TCP segment resulting from the TSO.
 743          */
 744
 745         if (skb->protocol == cpu_to_be16(ETH_P_IP)) {
 746                 ip_hdr(skb)->check = 0;
 747                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr,
 748                         ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
 749         } else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) {
 750                 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
 751                         &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
 752         }
 753
 754         /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
 755          * for the main skb fragment
 756          */
 757         while (frag_len_left) {
 758                 len = min(frag_len_left, (unsigned int)WQ_ENET_MAX_DESC_LEN);
 759                 dma_addr = pci_map_single(enic->pdev, skb->data + offset,
 760                                 len, PCI_DMA_TODEVICE);
 761                 enic_queue_wq_desc_tso(wq, skb,
 762                         dma_addr,
 763                         len,
 764                         mss, hdr_len,
 765                         vlan_tag_insert, vlan_tag,
 766                         eop && (len == frag_len_left), loopback);
 767                 frag_len_left -= len;
 768                 offset += len;
 769         }
 770
 771         if (eop)
 772                 return;
 773
 774         /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
 775          * for additional data fragments
 776          */
 777         for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
 778                 len_left -= frag->size;
 779                 frag_len_left = frag->size;
 780                 offset = frag->page_offset;
 781
 782                 while (frag_len_left) {
 783                         len = min(frag_len_left,
 784                                 (unsigned int)WQ_ENET_MAX_DESC_LEN);
 785                         dma_addr = pci_map_page(enic->pdev, frag->page,
 786                                 offset, len,
 787                                 PCI_DMA_TODEVICE);
 788                         enic_queue_wq_desc_cont(wq, skb,
 789                                 dma_addr,
 790                                 len,
 791                                 (len_left == 0) &&
 792                                 (len == frag_len_left),         /* EOP? */
 793                                 loopback);
 794                         frag_len_left -= len;
 795                         offset += len;
 796                 }
 797         }
 798 }
 799
 800 static inline void enic_queue_wq_skb(struct enic *enic,
 801         struct vnic_wq *wq, struct sk_buff *skb)
 802 {
 803         unsigned int mss = skb_shinfo(skb)->gso_size;
 804         unsigned int vlan_tag = 0;
 805         int vlan_tag_insert = 0;
 806         int loopback = 0;
 807
 808         if (vlan_tx_tag_present(skb)) {
 809                 /* VLAN tag from trunking driver */
 810                 vlan_tag_insert = 1;
 811                 vlan_tag = vlan_tx_tag_get(skb);
 812         } else if (enic->loop_enable) {
 813                 vlan_tag = enic->loop_tag;
 814                 loopback = 1;
 815         }
 816
 817         if (mss)
 818                 enic_queue_wq_skb_tso(enic, wq, skb, mss,
 819                         vlan_tag_insert, vlan_tag, loopback);
 820         else if (skb->ip_summed == CHECKSUM_PARTIAL)
 821                 enic_queue_wq_skb_csum_l4(enic, wq, skb,
 822                         vlan_tag_insert, vlan_tag, loopback);
 823         else
 824                 enic_queue_wq_skb_vlan(enic, wq, skb,
 825                         vlan_tag_insert, vlan_tag, loopback);
 826 }
 827
 828 /* netif_tx_lock held, process context with BHs disabled, or BH */
 829 static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb,
 830         struct net_device *netdev)
 831 {
 832         struct enic *enic = netdev_priv(netdev);
 833         struct vnic_wq *wq = &enic->wq[0];
 834         unsigned long flags;
 835
 836         if (skb->len <= 0) {
 837                 dev_kfree_skb(skb);
 838                 return NETDEV_TX_OK;
 839         }
 840
 841         /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs,
 842          * which is very likely.  In the off chance it's going to take
 843          * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb.
 844          */
 845
 846         if (skb_shinfo(skb)->gso_size == 0 &&
 847             skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC &&
 848             skb_linearize(skb)) {
 849                 dev_kfree_skb(skb);
 850                 return NETDEV_TX_OK;
 851         }
 852
 853         spin_lock_irqsave(&enic->wq_lock[0], flags);
 854
 855         if (vnic_wq_desc_avail(wq) <
 856             skb_shinfo(skb)->nr_frags + ENIC_DESC_MAX_SPLITS) {
 857                 netif_stop_queue(netdev);
 858                 /* This is a hard error, log it */
 859                 netdev_err(netdev, "BUG! Tx ring full when queue awake!\n");
 860                 spin_unlock_irqrestore(&enic->wq_lock[0], flags);
 861                 return NETDEV_TX_BUSY;
 862         }
 863
 864         enic_queue_wq_skb(enic, wq, skb);
 865
 866         if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS)
 867                 netif_stop_queue(netdev);
 868
 869         spin_unlock_irqrestore(&enic->wq_lock[0], flags);
 870
 871         return NETDEV_TX_OK;
 872 }
 873
 874 /* dev_base_lock rwlock held, nominally process context */
 875 static struct net_device_stats *enic_get_stats(struct net_device *netdev)
 876 {
 877         struct enic *enic = netdev_priv(netdev);
 878         struct net_device_stats *net_stats = &netdev->stats;
 879         struct vnic_stats *stats;
 880
 881         enic_dev_stats_dump(enic, &stats);
 882
 883         net_stats->tx_packets = stats->tx.tx_frames_ok;
 884         net_stats->tx_bytes = stats->tx.tx_bytes_ok;
 885         net_stats->tx_errors = stats->tx.tx_errors;
 886         net_stats->tx_dropped = stats->tx.tx_drops;
 887
 888         net_stats->rx_packets = stats->rx.rx_frames_ok;
 889         net_stats->rx_bytes = stats->rx.rx_bytes_ok;
 890         net_stats->rx_errors = stats->rx.rx_errors;
 891         net_stats->multicast = stats->rx.rx_multicast_frames_ok;
 892         net_stats->rx_over_errors = enic->rq_truncated_pkts;
 893         net_stats->rx_crc_errors = enic->rq_bad_fcs;
 894         net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop;
 895
 896         return net_stats;
 897 }
 898
 899 static void enic_reset_multicast_list(struct enic *enic)
 900 {
 901         enic->mc_count = 0;
 902         enic->flags = 0;
 903 }
 904
 905 static int enic_set_mac_addr(struct net_device *netdev, char *addr)
 906 {
 907         struct enic *enic = netdev_priv(netdev);
 908
 909         if (enic_is_dynamic(enic)) {
 910                 if (!is_valid_ether_addr(addr) && !is_zero_ether_addr(addr))
 911                         return -EADDRNOTAVAIL;
 912         } else {
 913                 if (!is_valid_ether_addr(addr))
 914                         return -EADDRNOTAVAIL;
 915         }
 916
 917         memcpy(netdev->dev_addr, addr, netdev->addr_len);
 918
 919         return 0;
 920 }
 921
 922 static int enic_dev_add_station_addr(struct enic *enic)
 923 {
 924         int err = 0;
 925
 926         if (is_valid_ether_addr(enic->netdev->dev_addr)) {
 927                 spin_lock(&enic->devcmd_lock);
 928                 err = vnic_dev_add_addr(enic->vdev, enic->netdev->dev_addr);
 929                 spin_unlock(&enic->devcmd_lock);
 930         }
 931
 932         return err;
 933 }
 934
 935 static int enic_dev_del_station_addr(struct enic *enic)
 936 {
 937         int err = 0;
 938
 939         if (is_valid_ether_addr(enic->netdev->dev_addr)) {
 940                 spin_lock(&enic->devcmd_lock);
 941                 err = vnic_dev_del_addr(enic->vdev, enic->netdev->dev_addr);
 942                 spin_unlock(&enic->devcmd_lock);
 943         }
 944
 945         return err;
 946 }
 947
 948 static int enic_set_mac_address_dynamic(struct net_device *netdev, void *p)
 949 {
 950         struct enic *enic = netdev_priv(netdev);
 951         struct sockaddr *saddr = p;
 952         char *addr = saddr->sa_data;
 953         int err;
 954
 955         if (netif_running(enic->netdev)) {
 956                 err = enic_dev_del_station_addr(enic);
 957                 if (err)
 958                         return err;
 959         }
 960
 961         err = enic_set_mac_addr(netdev, addr);
 962         if (err)
 963                 return err;
 964
 965         if (netif_running(enic->netdev)) {
 966                 err = enic_dev_add_station_addr(enic);
 967                 if (err)
 968                         return err;
 969         }
 970
 971         return err;
 972 }
 973
 974 static int enic_set_mac_address(struct net_device *netdev, void *p)
 975 {
 976         struct sockaddr *saddr = p;
 977         char *addr = saddr->sa_data;
 978         struct enic *enic = netdev_priv(netdev);
 979         int err;
 980
 981         err = enic_dev_del_station_addr(enic);
 982         if (err)
 983                 return err;
 984
 985         err = enic_set_mac_addr(netdev, addr);
 986         if (err)
 987                 return err;
 988
 989         return enic_dev_add_station_addr(enic);
 990 }
 991
 992 static int enic_dev_packet_filter(struct enic *enic, int directed,
 993         int multicast, int broadcast, int promisc, int allmulti)
 994 {
 995         int err;
 996
 997         spin_lock(&enic->devcmd_lock);
 998         err = vnic_dev_packet_filter(enic->vdev, directed,
 999                 multicast, broadcast, promisc, allmulti);
1000         spin_unlock(&enic->devcmd_lock);
1001
1002         return err;
1003 }
1004
1005 static int enic_dev_add_multicast_addr(struct enic *enic, u8 *addr)
1006 {
1007         int err;
1008
1009         spin_lock(&enic->devcmd_lock);
1010         err = vnic_dev_add_addr(enic->vdev, addr);
1011         spin_unlock(&enic->devcmd_lock);
1012
1013         return err;
1014 }
1015
1016 static int enic_dev_del_multicast_addr(struct enic *enic, u8 *addr)
1017 {
1018         int err;
1019
1020         spin_lock(&enic->devcmd_lock);
1021         err = vnic_dev_del_addr(enic->vdev, addr);
1022         spin_unlock(&enic->devcmd_lock);
1023
1024         return err;
1025 }
1026
1027 /* netif_tx_lock held, BHs disabled */
1028 static void enic_set_multicast_list(struct net_device *netdev)
1029 {
1030         struct enic *enic = netdev_priv(netdev);
1031         struct netdev_hw_addr *ha;
1032         int directed = 1;
1033         int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0;
1034         int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0;
1035         int promisc = (netdev->flags & IFF_PROMISC) ? 1 : 0;
1036         unsigned int mc_count = netdev_mc_count(netdev);
1037         int allmulti = (netdev->flags & IFF_ALLMULTI) ||
1038                 mc_count > ENIC_MULTICAST_PERFECT_FILTERS;
1039         unsigned int flags = netdev->flags | (allmulti ? IFF_ALLMULTI : 0);
1040         u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN];
1041         unsigned int i, j;
1042
1043         if (mc_count > ENIC_MULTICAST_PERFECT_FILTERS)
1044                 mc_count = ENIC_MULTICAST_PERFECT_FILTERS;
1045
1046         if (enic->flags != flags) {
1047                 enic->flags = flags;
1048                 enic_dev_packet_filter(enic, directed,
1049                         multicast, broadcast, promisc, allmulti);
1050         }
1051
1052         /* Is there an easier way?  Trying to minimize to
1053          * calls to add/del multicast addrs.  We keep the
1054          * addrs from the last call in enic->mc_addr and
1055          * look for changes to add/del.
1056          */
1057
1058         i = 0;
1059         netdev_for_each_mc_addr(ha, netdev) {
1060                 if (i == mc_count)
1061                         break;
1062                 memcpy(mc_addr[i++], ha->addr, ETH_ALEN);
1063         }
1064
1065         for (i = 0; i < enic->mc_count; i++) {
1066                 for (j = 0; j < mc_count; j++)
1067                         if (compare_ether_addr(enic->mc_addr[i],
1068                                 mc_addr[j]) == 0)
1069                                 break;
1070                 if (j == mc_count)
1071                         enic_dev_del_multicast_addr(enic, enic->mc_addr[i]);
1072         }
1073
1074         for (i = 0; i < mc_count; i++) {
1075                 for (j = 0; j < enic->mc_count; j++)
1076                         if (compare_ether_addr(mc_addr[i],
1077                                 enic->mc_addr[j]) == 0)
1078                                 break;
1079                 if (j == enic->mc_count)
1080                         enic_dev_add_multicast_addr(enic, mc_addr[i]);
1081         }
1082
1083         /* Save the list to compare against next time
1084          */
1085
1086         for (i = 0; i < mc_count; i++)
1087                 memcpy(enic->mc_addr[i], mc_addr[i], ETH_ALEN);
1088
1089         enic->mc_count = mc_count;
1090 }
1091
1092 /* rtnl lock is held */
1093 static void enic_vlan_rx_register(struct net_device *netdev,
1094         struct vlan_group *vlan_group)
1095 {
1096         struct enic *enic = netdev_priv(netdev);
1097         enic->vlan_group = vlan_group;
1098 }
1099
1100 /* rtnl lock is held */
1101 static void enic_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
1102 {
1103         struct enic *enic = netdev_priv(netdev);
1104
1105         spin_lock(&enic->devcmd_lock);
1106         enic_add_vlan(enic, vid);
1107         spin_unlock(&enic->devcmd_lock);
1108 }
1109
1110 /* rtnl lock is held */
1111 static void enic_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
1112 {
1113         struct enic *enic = netdev_priv(netdev);
1114
1115         spin_lock(&enic->devcmd_lock);
1116         enic_del_vlan(enic, vid);
1117         spin_unlock(&enic->devcmd_lock);
1118 }
1119
1120 /* netif_tx_lock held, BHs disabled */
1121 static void enic_tx_timeout(struct net_device *netdev)
1122 {
1123         struct enic *enic = netdev_priv(netdev);
1124         schedule_work(&enic->reset);
1125 }
1126
1127 static int enic_vnic_dev_deinit(struct enic *enic)
1128 {
1129         int err;
1130
1131         spin_lock(&enic->devcmd_lock);
1132         err = vnic_dev_deinit(enic->vdev);
1133         spin_unlock(&enic->devcmd_lock);
1134
1135         return err;
1136 }
1137
1138 static int enic_dev_init_prov(struct enic *enic, struct vic_provinfo *vp)
1139 {
1140         int err;
1141
1142         spin_lock(&enic->devcmd_lock);
1143         err = vnic_dev_init_prov(enic->vdev,
1144                 (u8 *)vp, vic_provinfo_size(vp));
1145         spin_unlock(&enic->devcmd_lock);
1146
1147         return err;
1148 }
1149
1150 static int enic_dev_init_done(struct enic *enic, int *done, int *error)
1151 {
1152         int err;
1153
1154         spin_lock(&enic->devcmd_lock);
1155         err = vnic_dev_init_done(enic->vdev, done, error);
1156         spin_unlock(&enic->devcmd_lock);
1157
1158         return err;
1159 }
1160
1161 static int enic_set_port_profile(struct enic *enic, u8 *mac)
1162 {
1163         struct vic_provinfo *vp;
1164         u8 oui[3] = VIC_PROVINFO_CISCO_OUI;
1165         char uuid_str[38];
1166         int err;
1167
1168         err = enic_vnic_dev_deinit(enic);
1169         if (err)
1170                 return err;
1171
1172         switch (enic->pp.request) {
1173
1174         case PORT_REQUEST_ASSOCIATE:
1175
1176                 if (!(enic->pp.set & ENIC_SET_NAME) || !strlen(enic->pp.name))
1177                         return -EINVAL;
1178
1179                 if (!is_valid_ether_addr(mac))
1180                         return -EADDRNOTAVAIL;
1181
1182                 vp = vic_provinfo_alloc(GFP_KERNEL, oui,
1183                         VIC_PROVINFO_LINUX_TYPE);
1184                 if (!vp)
1185                         return -ENOMEM;
1186
1187                 vic_provinfo_add_tlv(vp,
1188                         VIC_LINUX_PROV_TLV_PORT_PROFILE_NAME_STR,
1189                         strlen(enic->pp.name) + 1, enic->pp.name);
1190
1191                 vic_provinfo_add_tlv(vp,
1192                         VIC_LINUX_PROV_TLV_CLIENT_MAC_ADDR,
1193                         ETH_ALEN, mac);
1194
1195                 if (enic->pp.set & ENIC_SET_INSTANCE) {
1196                         sprintf(uuid_str, "%pUB", enic->pp.instance_uuid);
1197                         vic_provinfo_add_tlv(vp,
1198                                 VIC_LINUX_PROV_TLV_CLIENT_UUID_STR,
1199                                 sizeof(uuid_str), uuid_str);
1200                 }
1201
1202                 if (enic->pp.set & ENIC_SET_HOST) {
1203                         sprintf(uuid_str, "%pUB", enic->pp.host_uuid);
1204                         vic_provinfo_add_tlv(vp,
1205                                 VIC_LINUX_PROV_TLV_HOST_UUID_STR,
1206                                 sizeof(uuid_str), uuid_str);
1207                 }
1208
1209                 err = enic_dev_init_prov(enic, vp);
1210                 vic_provinfo_free(vp);
1211                 if (err)
1212                         return err;
1213                 break;
1214
1215         case PORT_REQUEST_DISASSOCIATE:
1216                 break;
1217
1218         default:
1219                 return -EINVAL;
1220         }
1221
1222         enic->pp.set |= ENIC_SET_APPLIED;
1223         return 0;
1224 }
1225
1226 static int enic_set_vf_port(struct net_device *netdev, int vf,
1227         struct nlattr *port[])
1228 {
1229         struct enic *enic = netdev_priv(netdev);
1230
1231         memset(&enic->pp, 0, sizeof(enic->pp));
1232
1233         if (port[IFLA_PORT_REQUEST]) {
1234                 enic->pp.set |= ENIC_SET_REQUEST;
1235                 enic->pp.request = nla_get_u8(port[IFLA_PORT_REQUEST]);
1236         }
1237
1238         if (port[IFLA_PORT_PROFILE]) {
1239                 enic->pp.set |= ENIC_SET_NAME;
1240                 memcpy(enic->pp.name, nla_data(port[IFLA_PORT_PROFILE]),
1241                         PORT_PROFILE_MAX);
1242         }
1243
1244         if (port[IFLA_PORT_INSTANCE_UUID]) {
1245                 enic->pp.set |= ENIC_SET_INSTANCE;
1246                 memcpy(enic->pp.instance_uuid,
1247                         nla_data(port[IFLA_PORT_INSTANCE_UUID]), PORT_UUID_MAX);
1248         }
1249
1250         if (port[IFLA_PORT_HOST_UUID]) {
1251                 enic->pp.set |= ENIC_SET_HOST;
1252                 memcpy(enic->pp.host_uuid,
1253                         nla_data(port[IFLA_PORT_HOST_UUID]), PORT_UUID_MAX);
1254         }
1255
1256         /* don't support VFs, yet */
1257         if (vf != PORT_SELF_VF)
1258                 return -EOPNOTSUPP;
1259
1260         if (!(enic->pp.set & ENIC_SET_REQUEST))
1261                 return -EOPNOTSUPP;
1262
1263         if (enic->pp.request == PORT_REQUEST_ASSOCIATE) {
1264
1265                 /* If the interface mac addr hasn't been assigned,
1266                  * assign a random mac addr before setting port-
1267                  * profile.
1268                  */
1269
1270                 if (is_zero_ether_addr(netdev->dev_addr))
1271                         random_ether_addr(netdev->dev_addr);
1272         }
1273
1274         return enic_set_port_profile(enic, netdev->dev_addr);
1275 }
1276
1277 static int enic_get_vf_port(struct net_device *netdev, int vf,
1278         struct sk_buff *skb)
1279 {
1280         struct enic *enic = netdev_priv(netdev);
1281         int err, error, done;
1282         u16 response = PORT_PROFILE_RESPONSE_SUCCESS;
1283
1284         if (!(enic->pp.set & ENIC_SET_APPLIED))
1285                 return -ENODATA;
1286
1287         err = enic_dev_init_done(enic, &done, &error);
1288         if (err)
1289                 error = err;
1290
1291         switch (error) {
1292         case ERR_SUCCESS:
1293                 if (!done)
1294                         response = PORT_PROFILE_RESPONSE_INPROGRESS;
1295                 break;
1296         case ERR_EINVAL:
1297                 response = PORT_PROFILE_RESPONSE_INVALID;
1298                 break;
1299         case ERR_EBADSTATE:
1300                 response = PORT_PROFILE_RESPONSE_BADSTATE;
1301                 break;
1302         case ERR_ENOMEM:
1303                 response = PORT_PROFILE_RESPONSE_INSUFFICIENT_RESOURCES;
1304                 break;
1305         default:
1306                 response = PORT_PROFILE_RESPONSE_ERROR;
1307                 break;
1308         }
1309
1310         NLA_PUT_U16(skb, IFLA_PORT_REQUEST, enic->pp.request);
1311         NLA_PUT_U16(skb, IFLA_PORT_RESPONSE, response);
1312         if (enic->pp.set & ENIC_SET_NAME)
1313                 NLA_PUT(skb, IFLA_PORT_PROFILE, PORT_PROFILE_MAX,
1314                         enic->pp.name);
1315         if (enic->pp.set & ENIC_SET_INSTANCE)
1316                 NLA_PUT(skb, IFLA_PORT_INSTANCE_UUID, PORT_UUID_MAX,
1317                         enic->pp.instance_uuid);
1318         if (enic->pp.set & ENIC_SET_HOST)
1319                 NLA_PUT(skb, IFLA_PORT_HOST_UUID, PORT_UUID_MAX,
1320                         enic->pp.host_uuid);
1321
1322         return 0;
1323
1324 nla_put_failure:
1325         return -EMSGSIZE;
1326 }
1327
1328 static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
1329 {
1330         struct enic *enic = vnic_dev_priv(rq->vdev);
1331
1332         if (!buf->os_buf)
1333                 return;
1334
1335         pci_unmap_single(enic->pdev, buf->dma_addr,
1336                 buf->len, PCI_DMA_FROMDEVICE);
1337         dev_kfree_skb_any(buf->os_buf);
1338 }
1339
1340 static int enic_rq_alloc_buf(struct vnic_rq *rq)
1341 {
1342         struct enic *enic = vnic_dev_priv(rq->vdev);
1343         struct net_device *netdev = enic->netdev;
1344         struct sk_buff *skb;
1345         unsigned int len = netdev->mtu + VLAN_ETH_HLEN;
1346         unsigned int os_buf_index = 0;
1347         dma_addr_t dma_addr;
1348
1349         skb = netdev_alloc_skb_ip_align(netdev, len);
1350         if (!skb)
1351                 return -ENOMEM;
1352
1353         dma_addr = pci_map_single(enic->pdev, skb->data,
1354                 len, PCI_DMA_FROMDEVICE);
1355
1356         enic_queue_rq_desc(rq, skb, os_buf_index,
1357                 dma_addr, len);
1358
1359         return 0;
1360 }
1361
1362 static int enic_rq_alloc_buf_a1(struct vnic_rq *rq)
1363 {
1364         struct rq_enet_desc *desc = vnic_rq_next_desc(rq);
1365
1366         if (vnic_rq_posting_soon(rq)) {
1367
1368                 /* SW workaround for A0 HW erratum: if we're just about
1369                  * to write posted_index, insert a dummy desc
1370                  * of type resvd
1371                  */
1372
1373                 rq_enet_desc_enc(desc, 0, RQ_ENET_TYPE_RESV2, 0);
1374                 vnic_rq_post(rq, 0, 0, 0, 0);
1375         } else {
1376                 return enic_rq_alloc_buf(rq);
1377         }
1378
1379         return 0;
1380 }
1381
1382 static int enic_dev_hw_version(struct enic *enic,
1383         enum vnic_dev_hw_version *hw_ver)
1384 {
1385         int err;
1386
1387         spin_lock(&enic->devcmd_lock);
1388         err = vnic_dev_hw_version(enic->vdev, hw_ver);
1389         spin_unlock(&enic->devcmd_lock);
1390
1391         return err;
1392 }
1393
1394 static int enic_set_rq_alloc_buf(struct enic *enic)
1395 {
1396         enum vnic_dev_hw_version hw_ver;
1397         int err;
1398
1399         err = enic_dev_hw_version(enic, &hw_ver);
1400         if (err)
1401                 return err;
1402
1403         switch (hw_ver) {
1404         case VNIC_DEV_HW_VER_A1:
1405                 enic->rq_alloc_buf = enic_rq_alloc_buf_a1;
1406                 break;
1407         case VNIC_DEV_HW_VER_A2:
1408         case VNIC_DEV_HW_VER_UNKNOWN:
1409                 enic->rq_alloc_buf = enic_rq_alloc_buf;
1410                 break;
1411         default:
1412                 return -ENODEV;
1413         }
1414
1415         return 0;
1416 }
1417
1418 static void enic_rq_indicate_buf(struct vnic_rq *rq,
1419         struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
1420         int skipped, void *opaque)
1421 {
1422         struct enic *enic = vnic_dev_priv(rq->vdev);
1423         struct net_device *netdev = enic->netdev;
1424         struct sk_buff *skb;
1425
1426         u8 type, color, eop, sop, ingress_port, vlan_stripped;
1427         u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
1428         u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
1429         u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
1430         u8 packet_error;
1431         u16 q_number, completed_index, bytes_written, vlan_tci, checksum;
1432         u32 rss_hash;
1433
1434         if (skipped)
1435                 return;
1436
1437         skb = buf->os_buf;
1438         prefetch(skb->data - NET_IP_ALIGN);
1439         pci_unmap_single(enic->pdev, buf->dma_addr,
1440                 buf->len, PCI_DMA_FROMDEVICE);
1441
1442         cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
1443                 &type, &color, &q_number, &completed_index,
1444                 &ingress_port, &fcoe, &eop, &sop, &rss_type,
1445                 &csum_not_calc, &rss_hash, &bytes_written,
1446                 &packet_error, &vlan_stripped, &vlan_tci, &checksum,
1447                 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
1448                 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
1449                 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
1450                 &fcs_ok);
1451
1452         if (packet_error) {
1453
1454                 if (!fcs_ok) {
1455                         if (bytes_written > 0)
1456                                 enic->rq_bad_fcs++;
1457                         else if (bytes_written == 0)
1458                                 enic->rq_truncated_pkts++;
1459                 }
1460
1461                 dev_kfree_skb_any(skb);
1462
1463                 return;
1464         }
1465
1466         if (eop && bytes_written > 0) {
1467
1468                 /* Good receive
1469                  */
1470
1471                 skb_put(skb, bytes_written);
1472                 skb->protocol = eth_type_trans(skb, netdev);
1473
1474                 if (enic->csum_rx_enabled && !csum_not_calc) {
1475                         skb->csum = htons(checksum);
1476                         skb->ip_summed = CHECKSUM_COMPLETE;
1477                 }
1478
1479                 skb->dev = netdev;
1480
1481                 if (enic->vlan_group && vlan_stripped &&
1482                         (vlan_tci & CQ_ENET_RQ_DESC_VLAN_TCI_VLAN_MASK)) {
1483
1484                         if (netdev->features & NETIF_F_GRO)
1485                                 vlan_gro_receive(&enic->napi[q_number],
1486                                         enic->vlan_group, vlan_tci, skb);
1487                         else
1488                                 vlan_hwaccel_receive_skb(skb,
1489                                         enic->vlan_group, vlan_tci);
1490
1491                 } else {
1492
1493                         if (netdev->features & NETIF_F_GRO)
1494                                 napi_gro_receive(&enic->napi[q_number], skb);
1495                         else
1496                                 netif_receive_skb(skb);
1497
1498                 }
1499         } else {
1500
1501                 /* Buffer overflow
1502                  */
1503
1504                 dev_kfree_skb_any(skb);
1505         }
1506 }
1507
1508 static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
1509         u8 type, u16 q_number, u16 completed_index, void *opaque)
1510 {
1511         struct enic *enic = vnic_dev_priv(vdev);
1512
1513         vnic_rq_service(&enic->rq[q_number], cq_desc,
1514                 completed_index, VNIC_RQ_RETURN_DESC,
1515                 enic_rq_indicate_buf, opaque);
1516
1517         return 0;
1518 }
1519
1520 static int enic_poll(struct napi_struct *napi, int budget)
1521 {
1522         struct net_device *netdev = napi->dev;
1523         struct enic *enic = netdev_priv(netdev);
1524         unsigned int cq_rq = enic_cq_rq(enic, 0);
1525         unsigned int cq_wq = enic_cq_wq(enic, 0);
1526         unsigned int intr = enic_legacy_io_intr();
1527         unsigned int rq_work_to_do = budget;
1528         unsigned int wq_work_to_do = -1; /* no limit */
1529         unsigned int  work_done, rq_work_done, wq_work_done;
1530         int err;
1531
1532         /* Service RQ (first) and WQ
1533          */
1534
1535         rq_work_done = vnic_cq_service(&enic->cq[cq_rq],
1536                 rq_work_to_do, enic_rq_service, NULL);
1537
1538         wq_work_done = vnic_cq_service(&enic->cq[cq_wq],
1539                 wq_work_to_do, enic_wq_service, NULL);
1540
1541         /* Accumulate intr event credits for this polling
1542          * cycle.  An intr event is the completion of a
1543          * a WQ or RQ packet.
1544          */
1545
1546         work_done = rq_work_done + wq_work_done;
1547
1548         if (work_done > 0)
1549                 vnic_intr_return_credits(&enic->intr[intr],
1550                         work_done,
1551                         0 /* don't unmask intr */,
1552                         0 /* don't reset intr timer */);
1553
1554         err = vnic_rq_fill(&enic->rq[0], enic->rq_alloc_buf);
1555
1556         /* Buffer allocation failed. Stay in polling
1557          * mode so we can try to fill the ring again.
1558          */
1559
1560         if (err)
1561                 rq_work_done = rq_work_to_do;
1562
1563         if (rq_work_done < rq_work_to_do) {
1564
1565                 /* Some work done, but not enough to stay in polling,
1566                  * exit polling
1567                  */
1568
1569                 napi_complete(napi);
1570                 vnic_intr_unmask(&enic->intr[intr]);
1571         }
1572
1573         return rq_work_done;
1574 }
1575
1576 static int enic_poll_msix(struct napi_struct *napi, int budget)
1577 {
1578         struct net_device *netdev = napi->dev;
1579         struct enic *enic = netdev_priv(netdev);
1580         unsigned int rq = (napi - &enic->napi[0]);
1581         unsigned int cq = enic_cq_rq(enic, rq);
1582         unsigned int intr = enic_msix_rq_intr(enic, rq);
1583         unsigned int work_to_do = budget;
1584         unsigned int work_done;
1585         int err;
1586
1587         /* Service RQ
1588          */
1589
1590         work_done = vnic_cq_service(&enic->cq[cq],
1591                 work_to_do, enic_rq_service, NULL);
1592
1593         /* Return intr event credits for this polling
1594          * cycle.  An intr event is the completion of a
1595          * RQ packet.
1596          */
1597
1598         if (work_done > 0)
1599                 vnic_intr_return_credits(&enic->intr[intr],
1600                         work_done,
1601                         0 /* don't unmask intr */,
1602                         0 /* don't reset intr timer */);
1603
1604         err = vnic_rq_fill(&enic->rq[rq], enic->rq_alloc_buf);
1605
1606         /* Buffer allocation failed. Stay in polling mode
1607          * so we can try to fill the ring again.
1608          */
1609
1610         if (err)
1611                 work_done = work_to_do;
1612
1613         if (work_done < work_to_do) {
1614
1615                 /* Some work done, but not enough to stay in polling,
1616                  * exit polling
1617                  */
1618
1619                 napi_complete(napi);
1620                 vnic_intr_unmask(&enic->intr[intr]);
1621         }
1622
1623         return work_done;
1624 }
1625
1626 static void enic_notify_timer(unsigned long data)
1627 {
1628         struct enic *enic = (struct enic *)data;
1629
1630         enic_notify_check(enic);
1631
1632         mod_timer(&enic->notify_timer,
1633                 round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD));
1634 }
1635
1636 static void enic_free_intr(struct enic *enic)
1637 {
1638         struct net_device *netdev = enic->netdev;
1639         unsigned int i;
1640
1641         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1642         case VNIC_DEV_INTR_MODE_INTX:
1643                 free_irq(enic->pdev->irq, netdev);
1644                 break;
1645         case VNIC_DEV_INTR_MODE_MSI:
1646                 free_irq(enic->pdev->irq, enic);
1647                 break;
1648         case VNIC_DEV_INTR_MODE_MSIX:
1649                 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1650                         if (enic->msix[i].requested)
1651                                 free_irq(enic->msix_entry[i].vector,
1652                                         enic->msix[i].devid);
1653                 break;
1654         default:
1655                 break;
1656         }
1657 }
1658
1659 static int enic_request_intr(struct enic *enic)
1660 {
1661         struct net_device *netdev = enic->netdev;
1662         unsigned int i, intr;
1663         int err = 0;
1664
1665         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1666
1667         case VNIC_DEV_INTR_MODE_INTX:
1668
1669                 err = request_irq(enic->pdev->irq, enic_isr_legacy,
1670                         IRQF_SHARED, netdev->name, netdev);
1671                 break;
1672
1673         case VNIC_DEV_INTR_MODE_MSI:
1674
1675                 err = request_irq(enic->pdev->irq, enic_isr_msi,
1676                         0, netdev->name, enic);
1677                 break;
1678
1679         case VNIC_DEV_INTR_MODE_MSIX:
1680
1681                 for (i = 0; i < enic->rq_count; i++) {
1682                         intr = enic_msix_rq_intr(enic, i);
1683                         sprintf(enic->msix[intr].devname,
1684                                 "%.11s-rx-%d", netdev->name, i);
1685                         enic->msix[intr].isr = enic_isr_msix_rq;
1686                         enic->msix[intr].devid = &enic->napi[i];
1687                 }
1688
1689                 for (i = 0; i < enic->wq_count; i++) {
1690                         intr = enic_msix_wq_intr(enic, i);
1691                         sprintf(enic->msix[intr].devname,
1692                                 "%.11s-tx-%d", netdev->name, i);
1693                         enic->msix[intr].isr = enic_isr_msix_wq;
1694                         enic->msix[intr].devid = enic;
1695                 }
1696
1697                 intr = enic_msix_err_intr(enic);
1698                 sprintf(enic->msix[intr].devname,
1699                         "%.11s-err", netdev->name);
1700                 enic->msix[intr].isr = enic_isr_msix_err;
1701                 enic->msix[intr].devid = enic;
1702
1703                 intr = enic_msix_notify_intr(enic);
1704                 sprintf(enic->msix[intr].devname,
1705                         "%.11s-notify", netdev->name);
1706                 enic->msix[intr].isr = enic_isr_msix_notify;
1707                 enic->msix[intr].devid = enic;
1708
1709                 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1710                         enic->msix[i].requested = 0;
1711
1712                 for (i = 0; i < enic->intr_count; i++) {
1713                         err = request_irq(enic->msix_entry[i].vector,
1714                                 enic->msix[i].isr, 0,
1715                                 enic->msix[i].devname,
1716                                 enic->msix[i].devid);
1717                         if (err) {
1718                                 enic_free_intr(enic);
1719                                 break;
1720                         }
1721                         enic->msix[i].requested = 1;
1722                 }
1723
1724                 break;
1725
1726         default:
1727                 break;
1728         }
1729
1730         return err;
1731 }
1732
1733 static void enic_synchronize_irqs(struct enic *enic)
1734 {
1735         unsigned int i;
1736
1737         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1738         case VNIC_DEV_INTR_MODE_INTX:
1739         case VNIC_DEV_INTR_MODE_MSI:
1740                 synchronize_irq(enic->pdev->irq);
1741                 break;
1742         case VNIC_DEV_INTR_MODE_MSIX:
1743                 for (i = 0; i < enic->intr_count; i++)
1744                         synchronize_irq(enic->msix_entry[i].vector);
1745                 break;
1746         default:
1747                 break;
1748         }
1749 }
1750
1751 static int enic_dev_notify_set(struct enic *enic)
1752 {
1753         int err;
1754
1755         spin_lock(&enic->devcmd_lock);
1756         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1757         case VNIC_DEV_INTR_MODE_INTX:
1758                 err = vnic_dev_notify_set(enic->vdev,
1759                         enic_legacy_notify_intr());
1760                 break;
1761         case VNIC_DEV_INTR_MODE_MSIX:
1762                 err = vnic_dev_notify_set(enic->vdev,
1763                         enic_msix_notify_intr(enic));
1764                 break;
1765         default:
1766                 err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */);
1767                 break;
1768         }
1769         spin_unlock(&enic->devcmd_lock);
1770
1771         return err;
1772 }
1773
1774 static int enic_dev_notify_unset(struct enic *enic)
1775 {
1776         int err;
1777
1778         spin_lock(&enic->devcmd_lock);
1779         err = vnic_dev_notify_unset(enic->vdev);
1780         spin_unlock(&enic->devcmd_lock);
1781
1782         return err;
1783 }
1784
1785 static int enic_dev_enable(struct enic *enic)
1786 {
1787         int err;
1788
1789         spin_lock(&enic->devcmd_lock);
1790         err = vnic_dev_enable_wait(enic->vdev);
1791         spin_unlock(&enic->devcmd_lock);
1792
1793         return err;
1794 }
1795
1796 static int enic_dev_disable(struct enic *enic)
1797 {
1798         int err;
1799
1800         spin_lock(&enic->devcmd_lock);
1801         err = vnic_dev_disable(enic->vdev);
1802         spin_unlock(&enic->devcmd_lock);
1803
1804         return err;
1805 }
1806
1807 static void enic_notify_timer_start(struct enic *enic)
1808 {
1809         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1810         case VNIC_DEV_INTR_MODE_MSI:
1811                 mod_timer(&enic->notify_timer, jiffies);
1812                 break;
1813         default:
1814                 /* Using intr for notification for INTx/MSI-X */
1815                 break;
1816         };
1817 }
1818
1819 /* rtnl lock is held, process context */
1820 static int enic_open(struct net_device *netdev)
1821 {
1822         struct enic *enic = netdev_priv(netdev);
1823         unsigned int i;
1824         int err;
1825
1826         err = enic_request_intr(enic);
1827         if (err) {
1828                 netdev_err(netdev, "Unable to request irq.\n");
1829                 return err;
1830         }
1831
1832         err = enic_dev_notify_set(enic);
1833         if (err) {
1834                 netdev_err(netdev,
1835                         "Failed to alloc notify buffer, aborting.\n");
1836                 goto err_out_free_intr;
1837         }
1838
1839         for (i = 0; i < enic->rq_count; i++) {
1840                 vnic_rq_fill(&enic->rq[i], enic->rq_alloc_buf);
1841                 /* Need at least one buffer on ring to get going */
1842                 if (vnic_rq_desc_used(&enic->rq[i]) == 0) {
1843                         netdev_err(netdev, "Unable to alloc receive buffers\n");
1844                         err = -ENOMEM;
1845                         goto err_out_notify_unset;
1846                 }
1847         }
1848
1849         for (i = 0; i < enic->wq_count; i++)
1850                 vnic_wq_enable(&enic->wq[i]);
1851         for (i = 0; i < enic->rq_count; i++)
1852                 vnic_rq_enable(&enic->rq[i]);
1853
1854         enic_dev_add_station_addr(enic);
1855         enic_set_multicast_list(netdev);
1856
1857         netif_wake_queue(netdev);
1858
1859         for (i = 0; i < enic->rq_count; i++)
1860                 napi_enable(&enic->napi[i]);
1861
1862         enic_dev_enable(enic);
1863
1864         for (i = 0; i < enic->intr_count; i++)
1865                 vnic_intr_unmask(&enic->intr[i]);
1866
1867         enic_notify_timer_start(enic);
1868
1869         return 0;
1870
1871 err_out_notify_unset:
1872         enic_dev_notify_unset(enic);
1873 err_out_free_intr:
1874         enic_free_intr(enic);
1875
1876         return err;
1877 }
1878
1879 /* rtnl lock is held, process context */
1880 static int enic_stop(struct net_device *netdev)
1881 {
1882         struct enic *enic = netdev_priv(netdev);
1883         unsigned int i;
1884         int err;
1885
1886         for (i = 0; i < enic->intr_count; i++) {
1887                 vnic_intr_mask(&enic->intr[i]);
1888                 (void)vnic_intr_masked(&enic->intr[i]); /* flush write */
1889         }
1890
1891         enic_synchronize_irqs(enic);
1892
1893         del_timer_sync(&enic->notify_timer);
1894
1895         enic_dev_disable(enic);
1896
1897         for (i = 0; i < enic->rq_count; i++)
1898                 napi_disable(&enic->napi[i]);
1899
1900         netif_carrier_off(netdev);
1901         netif_tx_disable(netdev);
1902         enic_dev_del_station_addr(enic);
1903
1904         for (i = 0; i < enic->wq_count; i++) {
1905                 err = vnic_wq_disable(&enic->wq[i]);
1906                 if (err)
1907                         return err;
1908         }
1909         for (i = 0; i < enic->rq_count; i++) {
1910                 err = vnic_rq_disable(&enic->rq[i]);
1911                 if (err)
1912                         return err;
1913         }
1914
1915         enic_dev_notify_unset(enic);
1916         enic_free_intr(enic);
1917
1918         for (i = 0; i < enic->wq_count; i++)
1919                 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
1920         for (i = 0; i < enic->rq_count; i++)
1921                 vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
1922         for (i = 0; i < enic->cq_count; i++)
1923                 vnic_cq_clean(&enic->cq[i]);
1924         for (i = 0; i < enic->intr_count; i++)
1925                 vnic_intr_clean(&enic->intr[i]);
1926
1927         return 0;
1928 }
1929
1930 static int enic_change_mtu(struct net_device *netdev, int new_mtu)
1931 {
1932         struct enic *enic = netdev_priv(netdev);
1933         int running = netif_running(netdev);
1934
1935         if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU)
1936                 return -EINVAL;
1937
1938         if (running)
1939                 enic_stop(netdev);
1940
1941         netdev->mtu = new_mtu;
1942
1943         if (netdev->mtu > enic->port_mtu)
1944                 netdev_warn(netdev,
1945                         "interface MTU (%d) set higher than port MTU (%d)\n",
1946                         netdev->mtu, enic->port_mtu);
1947
1948         if (running)
1949                 enic_open(netdev);
1950
1951         return 0;
1952 }
1953
1954 #ifdef CONFIG_NET_POLL_CONTROLLER
1955 static void enic_poll_controller(struct net_device *netdev)
1956 {
1957         struct enic *enic = netdev_priv(netdev);
1958         struct vnic_dev *vdev = enic->vdev;
1959         unsigned int i, intr;
1960
1961         switch (vnic_dev_get_intr_mode(vdev)) {
1962         case VNIC_DEV_INTR_MODE_MSIX:
1963                 for (i = 0; i < enic->rq_count; i++) {
1964                         intr = enic_msix_rq_intr(enic, i);
1965                         enic_isr_msix_rq(enic->msix_entry[intr].vector, enic);
1966                 }
1967                 intr = enic_msix_wq_intr(enic, i);
1968                 enic_isr_msix_wq(enic->msix_entry[intr].vector, enic);
1969                 break;
1970         case VNIC_DEV_INTR_MODE_MSI:
1971                 enic_isr_msi(enic->pdev->irq, enic);
1972                 break;
1973         case VNIC_DEV_INTR_MODE_INTX:
1974                 enic_isr_legacy(enic->pdev->irq, netdev);
1975                 break;
1976         default:
1977                 break;
1978         }
1979 }
1980 #endif
1981
1982 static int enic_dev_wait(struct vnic_dev *vdev,
1983         int (*start)(struct vnic_dev *, int),
1984         int (*finished)(struct vnic_dev *, int *),
1985         int arg)
1986 {
1987         unsigned long time;
1988         int done;
1989         int err;
1990
1991         BUG_ON(in_interrupt());
1992
1993         err = start(vdev, arg);
1994         if (err)
1995                 return err;
1996
1997         /* Wait for func to complete...2 seconds max
1998          */
1999
2000         time = jiffies + (HZ * 2);
2001         do {
2002
2003                 err = finished(vdev, &done);
2004                 if (err)
2005                         return err;
2006
2007                 if (done)
2008                         return 0;
2009
2010                 schedule_timeout_uninterruptible(HZ / 10);
2011
2012         } while (time_after(time, jiffies));
2013
2014         return -ETIMEDOUT;
2015 }
2016
2017 static int enic_dev_open(struct enic *enic)
2018 {
2019         int err;
2020
2021         err = enic_dev_wait(enic->vdev, vnic_dev_open,
2022                 vnic_dev_open_done, 0);
2023         if (err)
2024                 dev_err(enic_get_dev(enic), "vNIC device open failed, err %d\n",
2025                         err);
2026
2027         return err;
2028 }
2029
2030 static int enic_dev_hang_reset(struct enic *enic)
2031 {
2032         int err;
2033
2034         err = enic_dev_wait(enic->vdev, vnic_dev_hang_reset,
2035                 vnic_dev_hang_reset_done, 0);
2036         if (err)
2037                 netdev_err(enic->netdev, "vNIC hang reset failed, err %d\n",
2038                         err);
2039
2040         return err;
2041 }
2042
2043 static int enic_set_rsskey(struct enic *enic)
2044 {
2045         dma_addr_t rss_key_buf_pa;
2046         union vnic_rss_key *rss_key_buf_va = NULL;
2047         union vnic_rss_key rss_key = {
2048                 .key[0].b = {85, 67, 83, 97, 119, 101, 115, 111, 109, 101},
2049                 .key[1].b = {80, 65, 76, 79, 117, 110, 105, 113, 117, 101},
2050                 .key[2].b = {76, 73, 78, 85, 88, 114, 111, 99, 107, 115},
2051                 .key[3].b = {69, 78, 73, 67, 105, 115, 99, 111, 111, 108},
2052         };
2053         int err;
2054
2055         rss_key_buf_va = pci_alloc_consistent(enic->pdev,
2056                 sizeof(union vnic_rss_key), &rss_key_buf_pa);
2057         if (!rss_key_buf_va)
2058                 return -ENOMEM;
2059
2060         memcpy(rss_key_buf_va, &rss_key, sizeof(union vnic_rss_key));
2061
2062         spin_lock(&enic->devcmd_lock);
2063         err = enic_set_rss_key(enic,
2064                 rss_key_buf_pa,
2065                 sizeof(union vnic_rss_key));
2066         spin_unlock(&enic->devcmd_lock);
2067
2068         pci_free_consistent(enic->pdev, sizeof(union vnic_rss_key),
2069                 rss_key_buf_va, rss_key_buf_pa);
2070
2071         return err;
2072 }
2073
2074 static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits)
2075 {
2076         dma_addr_t rss_cpu_buf_pa;
2077         union vnic_rss_cpu *rss_cpu_buf_va = NULL;
2078         unsigned int i;
2079         int err;
2080
2081         rss_cpu_buf_va = pci_alloc_consistent(enic->pdev,
2082                 sizeof(union vnic_rss_cpu), &rss_cpu_buf_pa);
2083         if (!rss_cpu_buf_va)
2084                 return -ENOMEM;
2085
2086         for (i = 0; i < (1 << rss_hash_bits); i++)
2087                 (*rss_cpu_buf_va).cpu[i/4].b[i%4] = i % enic->rq_count;
2088
2089         spin_lock(&enic->devcmd_lock);
2090         err = enic_set_rss_cpu(enic,
2091                 rss_cpu_buf_pa,
2092                 sizeof(union vnic_rss_cpu));
2093         spin_unlock(&enic->devcmd_lock);
2094
2095         pci_free_consistent(enic->pdev, sizeof(union vnic_rss_cpu),
2096                 rss_cpu_buf_va, rss_cpu_buf_pa);
2097
2098         return err;
2099 }
2100
2101 static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu,
2102         u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable)
2103 {
2104         const u8 tso_ipid_split_en = 0;
2105         const u8 ig_vlan_strip_en = 1;
2106         int err;
2107
2108         /* Enable VLAN tag stripping.
2109         */
2110
2111         spin_lock(&enic->devcmd_lock);
2112         err = enic_set_nic_cfg(enic,
2113                 rss_default_cpu, rss_hash_type,
2114                 rss_hash_bits, rss_base_cpu,
2115                 rss_enable, tso_ipid_split_en,
2116                 ig_vlan_strip_en);
2117         spin_unlock(&enic->devcmd_lock);
2118
2119         return err;
2120 }
2121
2122 static int enic_set_rss_nic_cfg(struct enic *enic)
2123 {
2124         struct device *dev = enic_get_dev(enic);
2125         const u8 rss_default_cpu = 0;
2126         const u8 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 |
2127                 NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 |
2128                 NIC_CFG_RSS_HASH_TYPE_IPV6 |
2129                 NIC_CFG_RSS_HASH_TYPE_TCP_IPV6;
2130         const u8 rss_hash_bits = 7;
2131         const u8 rss_base_cpu = 0;
2132         u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1);
2133
2134         if (rss_enable) {
2135                 if (!enic_set_rsskey(enic)) {
2136                         if (enic_set_rsscpu(enic, rss_hash_bits)) {
2137                                 rss_enable = 0;
2138                                 dev_warn(dev, "RSS disabled, "
2139                                         "Failed to set RSS cpu indirection table.");
2140                         }
2141                 } else {
2142                         rss_enable = 0;
2143                         dev_warn(dev, "RSS disabled, Failed to set RSS key.\n");
2144                 }
2145         }
2146
2147         return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type,
2148                 rss_hash_bits, rss_base_cpu, rss_enable);
2149 }
2150
2151 static int enic_dev_hang_notify(struct enic *enic)
2152 {
2153         int err;
2154
2155         spin_lock(&enic->devcmd_lock);
2156         err = vnic_dev_hang_notify(enic->vdev);
2157         spin_unlock(&enic->devcmd_lock);
2158
2159         return err;
2160 }
2161
2162 static int enic_dev_set_ig_vlan_rewrite_mode(struct enic *enic)
2163 {
2164         int err;
2165
2166         spin_lock(&enic->devcmd_lock);
2167         err = vnic_dev_set_ig_vlan_rewrite_mode(enic->vdev,
2168                 IG_VLAN_REWRITE_MODE_PRIORITY_TAG_DEFAULT_VLAN);
2169         spin_unlock(&enic->devcmd_lock);
2170
2171         return err;
2172 }
2173
2174 static void enic_reset(struct work_struct *work)
2175 {
2176         struct enic *enic = container_of(work, struct enic, reset);
2177
2178         if (!netif_running(enic->netdev))
2179                 return;
2180
2181         rtnl_lock();
2182
2183         enic_dev_hang_notify(enic);
2184         enic_stop(enic->netdev);
2185         enic_dev_hang_reset(enic);
2186         enic_reset_multicast_list(enic);
2187         enic_init_vnic_resources(enic);
2188         enic_set_rss_nic_cfg(enic);
2189         enic_dev_set_ig_vlan_rewrite_mode(enic);
2190         enic_open(enic->netdev);
2191
2192         rtnl_unlock();
2193 }
2194
2195 static int enic_set_intr_mode(struct enic *enic)
2196 {
2197         unsigned int n = min_t(unsigned int, enic->rq_count, ENIC_RQ_MAX);
2198         unsigned int m = 1;
2199         unsigned int i;
2200
2201         /* Set interrupt mode (INTx, MSI, MSI-X) depending
2202          * on system capabilities.
2203          *
2204          * Try MSI-X first
2205          *
2206          * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs
2207          * (the second to last INTR is used for WQ/RQ errors)
2208          * (the last INTR is used for notifications)
2209          */
2210
2211         BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2);
2212         for (i = 0; i < n + m + 2; i++)
2213                 enic->msix_entry[i].entry = i;
2214
2215         /* Use multiple RQs if RSS is enabled
2216          */
2217
2218         if (ENIC_SETTING(enic, RSS) &&
2219             enic->config.intr_mode < 1 &&
2220             enic->rq_count >= n &&
2221             enic->wq_count >= m &&
2222             enic->cq_count >= n + m &&
2223             enic->intr_count >= n + m + 2) {
2224
2225                 if (!pci_enable_msix(enic->pdev, enic->msix_entry, n + m + 2)) {
2226
2227                         enic->rq_count = n;
2228                         enic->wq_count = m;
2229                         enic->cq_count = n + m;
2230                         enic->intr_count = n + m + 2;
2231
2232                         vnic_dev_set_intr_mode(enic->vdev,
2233                                 VNIC_DEV_INTR_MODE_MSIX);
2234
2235                         return 0;
2236                 }
2237         }
2238
2239         if (enic->config.intr_mode < 1 &&
2240             enic->rq_count >= 1 &&
2241             enic->wq_count >= m &&
2242             enic->cq_count >= 1 + m &&
2243             enic->intr_count >= 1 + m + 2) {
2244                 if (!pci_enable_msix(enic->pdev, enic->msix_entry, 1 + m + 2)) {
2245
2246                         enic->rq_count = 1;
2247                         enic->wq_count = m;
2248                         enic->cq_count = 1 + m;
2249                         enic->intr_count = 1 + m + 2;
2250
2251                         vnic_dev_set_intr_mode(enic->vdev,
2252                                 VNIC_DEV_INTR_MODE_MSIX);
2253
2254                         return 0;
2255                 }
2256         }
2257
2258         /* Next try MSI
2259          *
2260          * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR
2261          */
2262
2263         if (enic->config.intr_mode < 2 &&
2264             enic->rq_count >= 1 &&
2265             enic->wq_count >= 1 &&
2266             enic->cq_count >= 2 &&
2267             enic->intr_count >= 1 &&
2268             !pci_enable_msi(enic->pdev)) {
2269
2270                 enic->rq_count = 1;
2271                 enic->wq_count = 1;
2272                 enic->cq_count = 2;
2273                 enic->intr_count = 1;
2274
2275                 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI);
2276
2277                 return 0;
2278         }
2279
2280         /* Next try INTx
2281          *
2282          * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs
2283          * (the first INTR is used for WQ/RQ)
2284          * (the second INTR is used for WQ/RQ errors)
2285          * (the last INTR is used for notifications)
2286          */
2287
2288         if (enic->config.intr_mode < 3 &&
2289             enic->rq_count >= 1 &&
2290             enic->wq_count >= 1 &&
2291             enic->cq_count >= 2 &&
2292             enic->intr_count >= 3) {
2293
2294                 enic->rq_count = 1;
2295                 enic->wq_count = 1;
2296                 enic->cq_count = 2;
2297                 enic->intr_count = 3;
2298
2299                 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX);
2300
2301                 return 0;
2302         }
2303
2304         vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2305
2306         return -EINVAL;
2307 }
2308
2309 static void enic_clear_intr_mode(struct enic *enic)
2310 {
2311         switch (vnic_dev_get_intr_mode(enic->vdev)) {
2312         case VNIC_DEV_INTR_MODE_MSIX:
2313                 pci_disable_msix(enic->pdev);
2314                 break;
2315         case VNIC_DEV_INTR_MODE_MSI:
2316                 pci_disable_msi(enic->pdev);
2317                 break;
2318         default:
2319                 break;
2320         }
2321
2322         vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2323 }
2324
2325 static const struct net_device_ops enic_netdev_dynamic_ops = {
2326         .ndo_open               = enic_open,
2327         .ndo_stop               = enic_stop,
2328         .ndo_start_xmit         = enic_hard_start_xmit,
2329         .ndo_get_stats          = enic_get_stats,
2330         .ndo_validate_addr      = eth_validate_addr,
2331         .ndo_set_multicast_list = enic_set_multicast_list,
2332         .ndo_set_mac_address    = enic_set_mac_address_dynamic,
2333         .ndo_change_mtu         = enic_change_mtu,
2334         .ndo_vlan_rx_register   = enic_vlan_rx_register,
2335         .ndo_vlan_rx_add_vid    = enic_vlan_rx_add_vid,
2336         .ndo_vlan_rx_kill_vid   = enic_vlan_rx_kill_vid,
2337         .ndo_tx_timeout         = enic_tx_timeout,
2338         .ndo_set_vf_port        = enic_set_vf_port,
2339         .ndo_get_vf_port        = enic_get_vf_port,
2340 #ifdef CONFIG_NET_POLL_CONTROLLER
2341         .ndo_poll_controller    = enic_poll_controller,
2342 #endif
2343 };
2344
2345 static const struct net_device_ops enic_netdev_ops = {
2346         .ndo_open               = enic_open,
2347         .ndo_stop               = enic_stop,
2348         .ndo_start_xmit         = enic_hard_start_xmit,
2349         .ndo_get_stats          = enic_get_stats,
2350         .ndo_validate_addr      = eth_validate_addr,
2351         .ndo_set_mac_address    = enic_set_mac_address,
2352         .ndo_set_multicast_list = enic_set_multicast_list,
2353         .ndo_change_mtu         = enic_change_mtu,
2354         .ndo_vlan_rx_register   = enic_vlan_rx_register,
2355         .ndo_vlan_rx_add_vid    = enic_vlan_rx_add_vid,
2356         .ndo_vlan_rx_kill_vid   = enic_vlan_rx_kill_vid,
2357         .ndo_tx_timeout         = enic_tx_timeout,
2358 #ifdef CONFIG_NET_POLL_CONTROLLER
2359         .ndo_poll_controller    = enic_poll_controller,
2360 #endif
2361 };
2362
2363 static void enic_dev_deinit(struct enic *enic)
2364 {
2365         unsigned int i;
2366
2367         for (i = 0; i < enic->rq_count; i++)
2368                 netif_napi_del(&enic->napi[i]);
2369
2370         enic_free_vnic_resources(enic);
2371         enic_clear_intr_mode(enic);
2372 }
2373
2374 static int enic_dev_init(struct enic *enic)
2375 {
2376         struct device *dev = enic_get_dev(enic);
2377         struct net_device *netdev = enic->netdev;
2378         unsigned int i;
2379         int err;
2380
2381         /* Get vNIC configuration
2382          */
2383
2384         err = enic_get_vnic_config(enic);
2385         if (err) {
2386                 dev_err(dev, "Get vNIC configuration failed, aborting\n");
2387                 return err;
2388         }
2389
2390         /* Get available resource counts
2391          */
2392
2393         enic_get_res_counts(enic);
2394
2395         /* Set interrupt mode based on resource counts and system
2396          * capabilities
2397          */
2398
2399         err = enic_set_intr_mode(enic);
2400         if (err) {
2401                 dev_err(dev, "Failed to set intr mode based on resource "
2402                         "counts and system capabilities, aborting\n");
2403                 return err;
2404         }
2405
2406         /* Allocate and configure vNIC resources
2407          */
2408
2409         err = enic_alloc_vnic_resources(enic);
2410         if (err) {
2411                 dev_err(dev, "Failed to alloc vNIC resources, aborting\n");
2412                 goto err_out_free_vnic_resources;
2413         }
2414
2415         enic_init_vnic_resources(enic);
2416
2417         err = enic_set_rq_alloc_buf(enic);
2418         if (err) {
2419                 dev_err(dev, "Failed to set RQ buffer allocator, aborting\n");
2420                 goto err_out_free_vnic_resources;
2421         }
2422
2423         err = enic_set_rss_nic_cfg(enic);
2424         if (err) {
2425                 dev_err(dev, "Failed to config nic, aborting\n");
2426                 goto err_out_free_vnic_resources;
2427         }
2428
2429         err = enic_dev_set_ig_vlan_rewrite_mode(enic);
2430         if (err) {
2431                 dev_err(dev,
2432                         "Failed to set ingress vlan rewrite mode, aborting.\n");
2433                 goto err_out_free_vnic_resources;
2434         }
2435
2436         switch (vnic_dev_get_intr_mode(enic->vdev)) {
2437         default:
2438                 netif_napi_add(netdev, &enic->napi[0], enic_poll, 64);
2439                 break;
2440         case VNIC_DEV_INTR_MODE_MSIX:
2441                 for (i = 0; i < enic->rq_count; i++)
2442                         netif_napi_add(netdev, &enic->napi[i],
2443                                 enic_poll_msix, 64);
2444                 break;
2445         }
2446
2447         return 0;
2448
2449 err_out_free_vnic_resources:
2450         enic_clear_intr_mode(enic);
2451         enic_free_vnic_resources(enic);
2452
2453         return err;
2454 }
2455
2456 static void enic_iounmap(struct enic *enic)
2457 {
2458         unsigned int i;
2459
2460         for (i = 0; i < ARRAY_SIZE(enic->bar); i++)
2461                 if (enic->bar[i].vaddr)
2462                         iounmap(enic->bar[i].vaddr);
2463 }
2464
2465 static int __devinit enic_probe(struct pci_dev *pdev,
2466         const struct pci_device_id *ent)
2467 {
2468         struct device *dev = &pdev->dev;
2469         struct net_device *netdev;
2470         struct enic *enic;
2471         int using_dac = 0;
2472         unsigned int i;
2473         int err;
2474
2475         /* Allocate net device structure and initialize.  Private
2476          * instance data is initialized to zero.
2477          */
2478
2479         netdev = alloc_etherdev(sizeof(struct enic));
2480         if (!netdev) {
2481                 pr_err("Etherdev alloc failed, aborting\n");
2482                 return -ENOMEM;
2483         }
2484
2485         pci_set_drvdata(pdev, netdev);
2486
2487         SET_NETDEV_DEV(netdev, &pdev->dev);
2488
2489         enic = netdev_priv(netdev);
2490         enic->netdev = netdev;
2491         enic->pdev = pdev;
2492
2493         /* Setup PCI resources
2494          */
2495
2496         err = pci_enable_device_mem(pdev);
2497         if (err) {
2498                 dev_err(dev, "Cannot enable PCI device, aborting\n");
2499                 goto err_out_free_netdev;
2500         }
2501
2502         err = pci_request_regions(pdev, DRV_NAME);
2503         if (err) {
2504                 dev_err(dev, "Cannot request PCI regions, aborting\n");
2505                 goto err_out_disable_device;
2506         }
2507
2508         pci_set_master(pdev);
2509
2510         /* Query PCI controller on system for DMA addressing
2511          * limitation for the device.  Try 40-bit first, and
2512          * fail to 32-bit.
2513          */
2514
2515         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(40));
2516         if (err) {
2517                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2518                 if (err) {
2519                         dev_err(dev, "No usable DMA configuration, aborting\n");
2520                         goto err_out_release_regions;
2521                 }
2522                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
2523                 if (err) {
2524                         dev_err(dev, "Unable to obtain %u-bit DMA "
2525                                 "for consistent allocations, aborting\n", 32);
2526                         goto err_out_release_regions;
2527                 }
2528         } else {
2529                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(40));
2530                 if (err) {
2531                         dev_err(dev, "Unable to obtain %u-bit DMA "
2532                                 "for consistent allocations, aborting\n", 40);
2533                         goto err_out_release_regions;
2534                 }
2535                 using_dac = 1;
2536         }
2537
2538         /* Map vNIC resources from BAR0-5
2539          */
2540
2541         for (i = 0; i < ARRAY_SIZE(enic->bar); i++) {
2542                 if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
2543                         continue;
2544                 enic->bar[i].len = pci_resource_len(pdev, i);
2545                 enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len);
2546                 if (!enic->bar[i].vaddr) {
2547                         dev_err(dev, "Cannot memory-map BAR %d, aborting\n", i);
2548                         err = -ENODEV;
2549                         goto err_out_iounmap;
2550                 }
2551                 enic->bar[i].bus_addr = pci_resource_start(pdev, i);
2552         }
2553
2554         /* Register vNIC device
2555          */
2556
2557         enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar,
2558                 ARRAY_SIZE(enic->bar));
2559         if (!enic->vdev) {
2560                 dev_err(dev, "vNIC registration failed, aborting\n");
2561                 err = -ENODEV;
2562                 goto err_out_iounmap;
2563         }
2564
2565         /* Issue device open to get device in known state
2566          */
2567
2568         err = enic_dev_open(enic);
2569         if (err) {
2570                 dev_err(dev, "vNIC dev open failed, aborting\n");
2571                 goto err_out_vnic_unregister;
2572         }
2573
2574         /* Issue device init to initialize the vnic-to-switch link.
2575          * We'll start with carrier off and wait for link UP
2576          * notification later to turn on carrier.  We don't need
2577          * to wait here for the vnic-to-switch link initialization
2578          * to complete; link UP notification is the indication that
2579          * the process is complete.
2580          */
2581
2582         netif_carrier_off(netdev);
2583
2584         /* Do not call dev_init for a dynamic vnic.
2585          * For a dynamic vnic, init_prov_info will be
2586          * called later by an upper layer.
2587          */
2588
2589         if (!enic_is_dynamic(enic)) {
2590                 err = vnic_dev_init(enic->vdev, 0);
2591                 if (err) {
2592                         dev_err(dev, "vNIC dev init failed, aborting\n");
2593                         goto err_out_dev_close;
2594                 }
2595         }
2596
2597         /* Setup devcmd lock
2598          */
2599
2600         spin_lock_init(&enic->devcmd_lock);
2601
2602         err = enic_dev_init(enic);
2603         if (err) {
2604                 dev_err(dev, "Device initialization failed, aborting\n");
2605                 goto err_out_dev_close;
2606         }
2607
2608         /* Setup notification timer, HW reset task, and wq locks
2609          */
2610
2611         init_timer(&enic->notify_timer);
2612         enic->notify_timer.function = enic_notify_timer;
2613         enic->notify_timer.data = (unsigned long)enic;
2614
2615         INIT_WORK(&enic->reset, enic_reset);
2616
2617         for (i = 0; i < enic->wq_count; i++)
2618                 spin_lock_init(&enic->wq_lock[i]);
2619
2620         /* Register net device
2621          */
2622
2623         enic->port_mtu = enic->config.mtu;
2624         (void)enic_change_mtu(netdev, enic->port_mtu);
2625
2626         err = enic_set_mac_addr(netdev, enic->mac_addr);
2627         if (err) {
2628                 dev_err(dev, "Invalid MAC address, aborting\n");
2629                 goto err_out_dev_deinit;
2630         }
2631
2632         enic->tx_coalesce_usecs = enic->config.intr_timer_usec;
2633         enic->rx_coalesce_usecs = enic->tx_coalesce_usecs;
2634
2635         if (enic_is_dynamic(enic))
2636                 netdev->netdev_ops = &enic_netdev_dynamic_ops;
2637         else
2638                 netdev->netdev_ops = &enic_netdev_ops;
2639
2640         netdev->watchdog_timeo = 2 * HZ;
2641         netdev->ethtool_ops = &enic_ethtool_ops;
2642
2643         netdev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
2644         if (ENIC_SETTING(enic, LOOP)) {
2645                 netdev->features &= ~NETIF_F_HW_VLAN_TX;
2646                 enic->loop_enable = 1;
2647                 enic->loop_tag = enic->config.loop_tag;
2648                 dev_info(dev, "loopback tag=0x%04x\n", enic->loop_tag);
2649         }
2650         if (ENIC_SETTING(enic, TXCSUM))
2651                 netdev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
2652         if (ENIC_SETTING(enic, TSO))
2653                 netdev->features |= NETIF_F_TSO |
2654                         NETIF_F_TSO6 | NETIF_F_TSO_ECN;
2655         if (ENIC_SETTING(enic, LRO))
2656                 netdev->features |= NETIF_F_GRO;
2657         if (using_dac)
2658                 netdev->features |= NETIF_F_HIGHDMA;
2659
2660         enic->csum_rx_enabled = ENIC_SETTING(enic, RXCSUM);
2661
2662         err = register_netdev(netdev);
2663         if (err) {
2664                 dev_err(dev, "Cannot register net device, aborting\n");
2665                 goto err_out_dev_deinit;
2666         }
2667
2668         return 0;
2669
2670 err_out_dev_deinit:
2671         enic_dev_deinit(enic);
2672 err_out_dev_close:
2673         vnic_dev_close(enic->vdev);
2674 err_out_vnic_unregister:
2675         vnic_dev_unregister(enic->vdev);
2676 err_out_iounmap:
2677         enic_iounmap(enic);
2678 err_out_release_regions:
2679         pci_release_regions(pdev);
2680 err_out_disable_device:
2681         pci_disable_device(pdev);
2682 err_out_free_netdev:
2683         pci_set_drvdata(pdev, NULL);
2684         free_netdev(netdev);
2685
2686         return err;
2687 }
2688
2689 static void __devexit enic_remove(struct pci_dev *pdev)
2690 {
2691         struct net_device *netdev = pci_get_drvdata(pdev);
2692
2693         if (netdev) {
2694                 struct enic *enic = netdev_priv(netdev);
2695
2696                 flush_scheduled_work();
2697                 unregister_netdev(netdev);
2698                 enic_dev_deinit(enic);
2699                 vnic_dev_close(enic->vdev);
2700                 vnic_dev_unregister(enic->vdev);
2701                 enic_iounmap(enic);
2702                 pci_release_regions(pdev);
2703                 pci_disable_device(pdev);
2704                 pci_set_drvdata(pdev, NULL);
2705                 free_netdev(netdev);
2706         }
2707 }
2708
2709 static struct pci_driver enic_driver = {
2710         .name = DRV_NAME,
2711         .id_table = enic_id_table,
2712         .probe = enic_probe,
2713         .remove = __devexit_p(enic_remove),
2714 };
2715
2716 static int __init enic_init_module(void)
2717 {
2718         pr_info("%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
2719
2720         return pci_register_driver(&enic_driver);
2721 }
2722
2723 static void __exit enic_cleanup_module(void)
2724 {
2725         pci_unregister_driver(&enic_driver);
2726 }
2727
2728 module_init(enic_init_module);
2729 module_exit(enic_cleanup_module);