Pileus Git - ~andy/linux/blob - drivers/net/ethernet/cisco/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/interrupt.h>
  27 #include <linux/workqueue.h>
  28 #include <linux/pci.h>
  29 #include <linux/netdevice.h>
  30 #include <linux/etherdevice.h>
  31 #include <linux/if.h>
  32 #include <linux/if_ether.h>
  33 #include <linux/if_vlan.h>
  34 #include <linux/ethtool.h>
  35 #include <linux/in.h>
  36 #include <linux/ip.h>
  37 #include <linux/ipv6.h>
  38 #include <linux/tcp.h>
  39 #include <linux/rtnetlink.h>
  40 #include <linux/prefetch.h>
  41 #include <net/ip6_checksum.h>
  42
  43 #include "cq_enet_desc.h"
  44 #include "vnic_dev.h"
  45 #include "vnic_intr.h"
  46 #include "vnic_stats.h"
  47 #include "vnic_vic.h"
  48 #include "enic_res.h"
  49 #include "enic.h"
  50 #include "enic_dev.h"
  51 #include "enic_pp.h"
  52
  53 #define ENIC_NOTIFY_TIMER_PERIOD        (2 * HZ)
  54 #define WQ_ENET_MAX_DESC_LEN            (1 << WQ_ENET_LEN_BITS)
  55 #define MAX_TSO                         (1 << 16)
  56 #define ENIC_DESC_MAX_SPLITS            (MAX_TSO / WQ_ENET_MAX_DESC_LEN + 1)
  57
  58 #define PCI_DEVICE_ID_CISCO_VIC_ENET         0x0043  /* ethernet vnic */
  59 #define PCI_DEVICE_ID_CISCO_VIC_ENET_DYN     0x0044  /* enet dynamic vnic */
  60 #define PCI_DEVICE_ID_CISCO_VIC_ENET_VF      0x0071  /* enet SRIOV VF */
  61
  62 /* Supported devices */
  63 static DEFINE_PCI_DEVICE_TABLE(enic_id_table) = {
  64         { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET) },
  65         { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_DYN) },
  66         { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_VF) },
  67         { 0, }  /* end of table */
  68 };
  69
  70 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  71 MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>");
  72 MODULE_LICENSE("GPL");
  73 MODULE_VERSION(DRV_VERSION);
  74 MODULE_DEVICE_TABLE(pci, enic_id_table);
  75
  76 struct enic_stat {
  77         char name[ETH_GSTRING_LEN];
  78         unsigned int offset;
  79 };
  80
  81 #define ENIC_TX_STAT(stat)      \
  82         { .name = #stat, .offset = offsetof(struct vnic_tx_stats, stat) / 8 }
  83 #define ENIC_RX_STAT(stat)      \
  84         { .name = #stat, .offset = offsetof(struct vnic_rx_stats, stat) / 8 }
  85
  86 static const struct enic_stat enic_tx_stats[] = {
  87         ENIC_TX_STAT(tx_frames_ok),
  88         ENIC_TX_STAT(tx_unicast_frames_ok),
  89         ENIC_TX_STAT(tx_multicast_frames_ok),
  90         ENIC_TX_STAT(tx_broadcast_frames_ok),
  91         ENIC_TX_STAT(tx_bytes_ok),
  92         ENIC_TX_STAT(tx_unicast_bytes_ok),
  93         ENIC_TX_STAT(tx_multicast_bytes_ok),
  94         ENIC_TX_STAT(tx_broadcast_bytes_ok),
  95         ENIC_TX_STAT(tx_drops),
  96         ENIC_TX_STAT(tx_errors),
  97         ENIC_TX_STAT(tx_tso),
  98 };
  99
 100 static const struct enic_stat enic_rx_stats[] = {
 101         ENIC_RX_STAT(rx_frames_ok),
 102         ENIC_RX_STAT(rx_frames_total),
 103         ENIC_RX_STAT(rx_unicast_frames_ok),
 104         ENIC_RX_STAT(rx_multicast_frames_ok),
 105         ENIC_RX_STAT(rx_broadcast_frames_ok),
 106         ENIC_RX_STAT(rx_bytes_ok),
 107         ENIC_RX_STAT(rx_unicast_bytes_ok),
 108         ENIC_RX_STAT(rx_multicast_bytes_ok),
 109         ENIC_RX_STAT(rx_broadcast_bytes_ok),
 110         ENIC_RX_STAT(rx_drop),
 111         ENIC_RX_STAT(rx_no_bufs),
 112         ENIC_RX_STAT(rx_errors),
 113         ENIC_RX_STAT(rx_rss),
 114         ENIC_RX_STAT(rx_crc_errors),
 115         ENIC_RX_STAT(rx_frames_64),
 116         ENIC_RX_STAT(rx_frames_127),
 117         ENIC_RX_STAT(rx_frames_255),
 118         ENIC_RX_STAT(rx_frames_511),
 119         ENIC_RX_STAT(rx_frames_1023),
 120         ENIC_RX_STAT(rx_frames_1518),
 121         ENIC_RX_STAT(rx_frames_to_max),
 122 };
 123
 124 static const unsigned int enic_n_tx_stats = ARRAY_SIZE(enic_tx_stats);
 125 static const unsigned int enic_n_rx_stats = ARRAY_SIZE(enic_rx_stats);
 126
 127 int enic_is_dynamic(struct enic *enic)
 128 {
 129         return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_DYN;
 130 }
 131
 132 int enic_sriov_enabled(struct enic *enic)
 133 {
 134         return (enic->priv_flags & ENIC_SRIOV_ENABLED) ? 1 : 0;
 135 }
 136
 137 static int enic_is_sriov_vf(struct enic *enic)
 138 {
 139         return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_VF;
 140 }
 141
 142 int enic_is_valid_vf(struct enic *enic, int vf)
 143 {
 144 #ifdef CONFIG_PCI_IOV
 145         return vf >= 0 && vf < enic->num_vfs;
 146 #else
 147         return 0;
 148 #endif
 149 }
 150
 151 static inline unsigned int enic_cq_rq(struct enic *enic, unsigned int rq)
 152 {
 153         return rq;
 154 }
 155
 156 static inline unsigned int enic_cq_wq(struct enic *enic, unsigned int wq)
 157 {
 158         return enic->rq_count + wq;
 159 }
 160
 161 static inline unsigned int enic_legacy_io_intr(void)
 162 {
 163         return 0;
 164 }
 165
 166 static inline unsigned int enic_legacy_err_intr(void)
 167 {
 168         return 1;
 169 }
 170
 171 static inline unsigned int enic_legacy_notify_intr(void)
 172 {
 173         return 2;
 174 }
 175
 176 static inline unsigned int enic_msix_rq_intr(struct enic *enic, unsigned int rq)
 177 {
 178         return enic->cq[enic_cq_rq(enic, rq)].interrupt_offset;
 179 }
 180
 181 static inline unsigned int enic_msix_wq_intr(struct enic *enic, unsigned int wq)
 182 {
 183         return enic->cq[enic_cq_wq(enic, wq)].interrupt_offset;
 184 }
 185
 186 static inline unsigned int enic_msix_err_intr(struct enic *enic)
 187 {
 188         return enic->rq_count + enic->wq_count;
 189 }
 190
 191 static inline unsigned int enic_msix_notify_intr(struct enic *enic)
 192 {
 193         return enic->rq_count + enic->wq_count + 1;
 194 }
 195
 196 static int enic_get_settings(struct net_device *netdev,
 197         struct ethtool_cmd *ecmd)
 198 {
 199         struct enic *enic = netdev_priv(netdev);
 200
 201         ecmd->supported = (SUPPORTED_10000baseT_Full | SUPPORTED_FIBRE);
 202         ecmd->advertising = (ADVERTISED_10000baseT_Full | ADVERTISED_FIBRE);
 203         ecmd->port = PORT_FIBRE;
 204         ecmd->transceiver = XCVR_EXTERNAL;
 205
 206         if (netif_carrier_ok(netdev)) {
 207                 ethtool_cmd_speed_set(ecmd, vnic_dev_port_speed(enic->vdev));
 208                 ecmd->duplex = DUPLEX_FULL;
 209         } else {
 210                 ethtool_cmd_speed_set(ecmd, -1);
 211                 ecmd->duplex = -1;
 212         }
 213
 214         ecmd->autoneg = AUTONEG_DISABLE;
 215
 216         return 0;
 217 }
 218
 219 static void enic_get_drvinfo(struct net_device *netdev,
 220         struct ethtool_drvinfo *drvinfo)
 221 {
 222         struct enic *enic = netdev_priv(netdev);
 223         struct vnic_devcmd_fw_info *fw_info;
 224
 225         enic_dev_fw_info(enic, &fw_info);
 226
 227         strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
 228         strlcpy(drvinfo->version, DRV_VERSION, sizeof(drvinfo->version));
 229         strlcpy(drvinfo->fw_version, fw_info->fw_version,
 230                 sizeof(drvinfo->fw_version));
 231         strlcpy(drvinfo->bus_info, pci_name(enic->pdev),
 232                 sizeof(drvinfo->bus_info));
 233 }
 234
 235 static void enic_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
 236 {
 237         unsigned int i;
 238
 239         switch (stringset) {
 240         case ETH_SS_STATS:
 241                 for (i = 0; i < enic_n_tx_stats; i++) {
 242                         memcpy(data, enic_tx_stats[i].name, ETH_GSTRING_LEN);
 243                         data += ETH_GSTRING_LEN;
 244                 }
 245                 for (i = 0; i < enic_n_rx_stats; i++) {
 246                         memcpy(data, enic_rx_stats[i].name, ETH_GSTRING_LEN);
 247                         data += ETH_GSTRING_LEN;
 248                 }
 249                 break;
 250         }
 251 }
 252
 253 static int enic_get_sset_count(struct net_device *netdev, int sset)
 254 {
 255         switch (sset) {
 256         case ETH_SS_STATS:
 257                 return enic_n_tx_stats + enic_n_rx_stats;
 258         default:
 259                 return -EOPNOTSUPP;
 260         }
 261 }
 262
 263 static void enic_get_ethtool_stats(struct net_device *netdev,
 264         struct ethtool_stats *stats, u64 *data)
 265 {
 266         struct enic *enic = netdev_priv(netdev);
 267         struct vnic_stats *vstats;
 268         unsigned int i;
 269
 270         enic_dev_stats_dump(enic, &vstats);
 271
 272         for (i = 0; i < enic_n_tx_stats; i++)
 273                 *(data++) = ((u64 *)&vstats->tx)[enic_tx_stats[i].offset];
 274         for (i = 0; i < enic_n_rx_stats; i++)
 275                 *(data++) = ((u64 *)&vstats->rx)[enic_rx_stats[i].offset];
 276 }
 277
 278 static u32 enic_get_msglevel(struct net_device *netdev)
 279 {
 280         struct enic *enic = netdev_priv(netdev);
 281         return enic->msg_enable;
 282 }
 283
 284 static void enic_set_msglevel(struct net_device *netdev, u32 value)
 285 {
 286         struct enic *enic = netdev_priv(netdev);
 287         enic->msg_enable = value;
 288 }
 289
 290 static int enic_get_coalesce(struct net_device *netdev,
 291         struct ethtool_coalesce *ecmd)
 292 {
 293         struct enic *enic = netdev_priv(netdev);
 294
 295         ecmd->tx_coalesce_usecs = enic->tx_coalesce_usecs;
 296         ecmd->rx_coalesce_usecs = enic->rx_coalesce_usecs;
 297
 298         return 0;
 299 }
 300
 301 static int enic_set_coalesce(struct net_device *netdev,
 302         struct ethtool_coalesce *ecmd)
 303 {
 304         struct enic *enic = netdev_priv(netdev);
 305         u32 tx_coalesce_usecs;
 306         u32 rx_coalesce_usecs;
 307         unsigned int i, intr;
 308
 309         tx_coalesce_usecs = min_t(u32, ecmd->tx_coalesce_usecs,
 310                 vnic_dev_get_intr_coal_timer_max(enic->vdev));
 311         rx_coalesce_usecs = min_t(u32, ecmd->rx_coalesce_usecs,
 312                 vnic_dev_get_intr_coal_timer_max(enic->vdev));
 313
 314         switch (vnic_dev_get_intr_mode(enic->vdev)) {
 315         case VNIC_DEV_INTR_MODE_INTX:
 316                 if (tx_coalesce_usecs != rx_coalesce_usecs)
 317                         return -EINVAL;
 318
 319                 intr = enic_legacy_io_intr();
 320                 vnic_intr_coalescing_timer_set(&enic->intr[intr],
 321                         tx_coalesce_usecs);
 322                 break;
 323         case VNIC_DEV_INTR_MODE_MSI:
 324                 if (tx_coalesce_usecs != rx_coalesce_usecs)
 325                         return -EINVAL;
 326
 327                 vnic_intr_coalescing_timer_set(&enic->intr[0],
 328                         tx_coalesce_usecs);
 329                 break;
 330         case VNIC_DEV_INTR_MODE_MSIX:
 331                 for (i = 0; i < enic->wq_count; i++) {
 332                         intr = enic_msix_wq_intr(enic, i);
 333                         vnic_intr_coalescing_timer_set(&enic->intr[intr],
 334                                 tx_coalesce_usecs);
 335                 }
 336
 337                 for (i = 0; i < enic->rq_count; i++) {
 338                         intr = enic_msix_rq_intr(enic, i);
 339                         vnic_intr_coalescing_timer_set(&enic->intr[intr],
 340                                 rx_coalesce_usecs);
 341                 }
 342
 343                 break;
 344         default:
 345                 break;
 346         }
 347
 348         enic->tx_coalesce_usecs = tx_coalesce_usecs;
 349         enic->rx_coalesce_usecs = rx_coalesce_usecs;
 350
 351         return 0;
 352 }
 353
 354 static const struct ethtool_ops enic_ethtool_ops = {
 355         .get_settings = enic_get_settings,
 356         .get_drvinfo = enic_get_drvinfo,
 357         .get_msglevel = enic_get_msglevel,
 358         .set_msglevel = enic_set_msglevel,
 359         .get_link = ethtool_op_get_link,
 360         .get_strings = enic_get_strings,
 361         .get_sset_count = enic_get_sset_count,
 362         .get_ethtool_stats = enic_get_ethtool_stats,
 363         .get_coalesce = enic_get_coalesce,
 364         .set_coalesce = enic_set_coalesce,
 365 };
 366
 367 static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
 368 {
 369         struct enic *enic = vnic_dev_priv(wq->vdev);
 370
 371         if (buf->sop)
 372                 pci_unmap_single(enic->pdev, buf->dma_addr,
 373                         buf->len, PCI_DMA_TODEVICE);
 374         else
 375                 pci_unmap_page(enic->pdev, buf->dma_addr,
 376                         buf->len, PCI_DMA_TODEVICE);
 377
 378         if (buf->os_buf)
 379                 dev_kfree_skb_any(buf->os_buf);
 380 }
 381
 382 static void enic_wq_free_buf(struct vnic_wq *wq,
 383         struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque)
 384 {
 385         enic_free_wq_buf(wq, buf);
 386 }
 387
 388 static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
 389         u8 type, u16 q_number, u16 completed_index, void *opaque)
 390 {
 391         struct enic *enic = vnic_dev_priv(vdev);
 392
 393         spin_lock(&enic->wq_lock[q_number]);
 394
 395         vnic_wq_service(&enic->wq[q_number], cq_desc,
 396                 completed_index, enic_wq_free_buf,
 397                 opaque);
 398
 399         if (netif_queue_stopped(enic->netdev) &&
 400             vnic_wq_desc_avail(&enic->wq[q_number]) >=
 401             (MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS))
 402                 netif_wake_queue(enic->netdev);
 403
 404         spin_unlock(&enic->wq_lock[q_number]);
 405
 406         return 0;
 407 }
 408
 409 static void enic_log_q_error(struct enic *enic)
 410 {
 411         unsigned int i;
 412         u32 error_status;
 413
 414         for (i = 0; i < enic->wq_count; i++) {
 415                 error_status = vnic_wq_error_status(&enic->wq[i]);
 416                 if (error_status)
 417                         netdev_err(enic->netdev, "WQ[%d] error_status %d\n",
 418                                 i, error_status);
 419         }
 420
 421         for (i = 0; i < enic->rq_count; i++) {
 422                 error_status = vnic_rq_error_status(&enic->rq[i]);
 423                 if (error_status)
 424                         netdev_err(enic->netdev, "RQ[%d] error_status %d\n",
 425                                 i, error_status);
 426         }
 427 }
 428
 429 static void enic_msglvl_check(struct enic *enic)
 430 {
 431         u32 msg_enable = vnic_dev_msg_lvl(enic->vdev);
 432
 433         if (msg_enable != enic->msg_enable) {
 434                 netdev_info(enic->netdev, "msg lvl changed from 0x%x to 0x%x\n",
 435                         enic->msg_enable, msg_enable);
 436                 enic->msg_enable = msg_enable;
 437         }
 438 }
 439
 440 static void enic_mtu_check(struct enic *enic)
 441 {
 442         u32 mtu = vnic_dev_mtu(enic->vdev);
 443         struct net_device *netdev = enic->netdev;
 444
 445         if (mtu && mtu != enic->port_mtu) {
 446                 enic->port_mtu = mtu;
 447                 if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) {
 448                         mtu = max_t(int, ENIC_MIN_MTU,
 449                                 min_t(int, ENIC_MAX_MTU, mtu));
 450                         if (mtu != netdev->mtu)
 451                                 schedule_work(&enic->change_mtu_work);
 452                 } else {
 453                         if (mtu < netdev->mtu)
 454                                 netdev_warn(netdev,
 455                                         "interface MTU (%d) set higher "
 456                                         "than switch port MTU (%d)\n",
 457                                         netdev->mtu, mtu);
 458                 }
 459         }
 460 }
 461
 462 static void enic_link_check(struct enic *enic)
 463 {
 464         int link_status = vnic_dev_link_status(enic->vdev);
 465         int carrier_ok = netif_carrier_ok(enic->netdev);
 466
 467         if (link_status && !carrier_ok) {
 468                 netdev_info(enic->netdev, "Link UP\n");
 469                 netif_carrier_on(enic->netdev);
 470         } else if (!link_status && carrier_ok) {
 471                 netdev_info(enic->netdev, "Link DOWN\n");
 472                 netif_carrier_off(enic->netdev);
 473         }
 474 }
 475
 476 static void enic_notify_check(struct enic *enic)
 477 {
 478         enic_msglvl_check(enic);
 479         enic_mtu_check(enic);
 480         enic_link_check(enic);
 481 }
 482
 483 #define ENIC_TEST_INTR(pba, i) (pba & (1 << i))
 484
 485 static irqreturn_t enic_isr_legacy(int irq, void *data)
 486 {
 487         struct net_device *netdev = data;
 488         struct enic *enic = netdev_priv(netdev);
 489         unsigned int io_intr = enic_legacy_io_intr();
 490         unsigned int err_intr = enic_legacy_err_intr();
 491         unsigned int notify_intr = enic_legacy_notify_intr();
 492         u32 pba;
 493
 494         vnic_intr_mask(&enic->intr[io_intr]);
 495
 496         pba = vnic_intr_legacy_pba(enic->legacy_pba);
 497         if (!pba) {
 498                 vnic_intr_unmask(&enic->intr[io_intr]);
 499                 return IRQ_NONE;        /* not our interrupt */
 500         }
 501
 502         if (ENIC_TEST_INTR(pba, notify_intr)) {
 503                 vnic_intr_return_all_credits(&enic->intr[notify_intr]);
 504                 enic_notify_check(enic);
 505         }
 506
 507         if (ENIC_TEST_INTR(pba, err_intr)) {
 508                 vnic_intr_return_all_credits(&enic->intr[err_intr]);
 509                 enic_log_q_error(enic);
 510                 /* schedule recovery from WQ/RQ error */
 511                 schedule_work(&enic->reset);
 512                 return IRQ_HANDLED;
 513         }
 514
 515         if (ENIC_TEST_INTR(pba, io_intr)) {
 516                 if (napi_schedule_prep(&enic->napi[0]))
 517                         __napi_schedule(&enic->napi[0]);
 518         } else {
 519                 vnic_intr_unmask(&enic->intr[io_intr]);
 520         }
 521
 522         return IRQ_HANDLED;
 523 }
 524
 525 static irqreturn_t enic_isr_msi(int irq, void *data)
 526 {
 527         struct enic *enic = data;
 528
 529         /* With MSI, there is no sharing of interrupts, so this is
 530          * our interrupt and there is no need to ack it.  The device
 531          * is not providing per-vector masking, so the OS will not
 532          * write to PCI config space to mask/unmask the interrupt.
 533          * We're using mask_on_assertion for MSI, so the device
 534          * automatically masks the interrupt when the interrupt is
 535          * generated.  Later, when exiting polling, the interrupt
 536          * will be unmasked (see enic_poll).
 537          *
 538          * Also, the device uses the same PCIe Traffic Class (TC)
 539          * for Memory Write data and MSI, so there are no ordering
 540          * issues; the MSI will always arrive at the Root Complex
 541          * _after_ corresponding Memory Writes (i.e. descriptor
 542          * writes).
 543          */
 544
 545         napi_schedule(&enic->napi[0]);
 546
 547         return IRQ_HANDLED;
 548 }
 549
 550 static irqreturn_t enic_isr_msix_rq(int irq, void *data)
 551 {
 552         struct napi_struct *napi = data;
 553
 554         /* schedule NAPI polling for RQ cleanup */
 555         napi_schedule(napi);
 556
 557         return IRQ_HANDLED;
 558 }
 559
 560 static irqreturn_t enic_isr_msix_wq(int irq, void *data)
 561 {
 562         struct enic *enic = data;
 563         unsigned int cq = enic_cq_wq(enic, 0);
 564         unsigned int intr = enic_msix_wq_intr(enic, 0);
 565         unsigned int wq_work_to_do = -1; /* no limit */
 566         unsigned int wq_work_done;
 567
 568         wq_work_done = vnic_cq_service(&enic->cq[cq],
 569                 wq_work_to_do, enic_wq_service, NULL);
 570
 571         vnic_intr_return_credits(&enic->intr[intr],
 572                 wq_work_done,
 573                 1 /* unmask intr */,
 574                 1 /* reset intr timer */);
 575
 576         return IRQ_HANDLED;
 577 }
 578
 579 static irqreturn_t enic_isr_msix_err(int irq, void *data)
 580 {
 581         struct enic *enic = data;
 582         unsigned int intr = enic_msix_err_intr(enic);
 583
 584         vnic_intr_return_all_credits(&enic->intr[intr]);
 585
 586         enic_log_q_error(enic);
 587
 588         /* schedule recovery from WQ/RQ error */
 589         schedule_work(&enic->reset);
 590
 591         return IRQ_HANDLED;
 592 }
 593
 594 static irqreturn_t enic_isr_msix_notify(int irq, void *data)
 595 {
 596         struct enic *enic = data;
 597         unsigned int intr = enic_msix_notify_intr(enic);
 598
 599         vnic_intr_return_all_credits(&enic->intr[intr]);
 600         enic_notify_check(enic);
 601
 602         return IRQ_HANDLED;
 603 }
 604
 605 static inline void enic_queue_wq_skb_cont(struct enic *enic,
 606         struct vnic_wq *wq, struct sk_buff *skb,
 607         unsigned int len_left, int loopback)
 608 {
 609         const skb_frag_t *frag;
 610
 611         /* Queue additional data fragments */
 612         for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
 613                 len_left -= skb_frag_size(frag);
 614                 enic_queue_wq_desc_cont(wq, skb,
 615                         skb_frag_dma_map(&enic->pdev->dev,
 616                                          frag, 0, skb_frag_size(frag),
 617                                          DMA_TO_DEVICE),
 618                         skb_frag_size(frag),
 619                         (len_left == 0),        /* EOP? */
 620                         loopback);
 621         }
 622 }
 623
 624 static inline void enic_queue_wq_skb_vlan(struct enic *enic,
 625         struct vnic_wq *wq, struct sk_buff *skb,
 626         int vlan_tag_insert, unsigned int vlan_tag, int loopback)
 627 {
 628         unsigned int head_len = skb_headlen(skb);
 629         unsigned int len_left = skb->len - head_len;
 630         int eop = (len_left == 0);
 631
 632         /* Queue the main skb fragment. The fragments are no larger
 633          * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
 634          * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
 635          * per fragment is queued.
 636          */
 637         enic_queue_wq_desc(wq, skb,
 638                 pci_map_single(enic->pdev, skb->data,
 639                         head_len, PCI_DMA_TODEVICE),
 640                 head_len,
 641                 vlan_tag_insert, vlan_tag,
 642                 eop, loopback);
 643
 644         if (!eop)
 645                 enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
 646 }
 647
 648 static inline void enic_queue_wq_skb_csum_l4(struct enic *enic,
 649         struct vnic_wq *wq, struct sk_buff *skb,
 650         int vlan_tag_insert, unsigned int vlan_tag, int loopback)
 651 {
 652         unsigned int head_len = skb_headlen(skb);
 653         unsigned int len_left = skb->len - head_len;
 654         unsigned int hdr_len = skb_checksum_start_offset(skb);
 655         unsigned int csum_offset = hdr_len + skb->csum_offset;
 656         int eop = (len_left == 0);
 657
 658         /* Queue the main skb fragment. The fragments are no larger
 659          * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
 660          * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
 661          * per fragment is queued.
 662          */
 663         enic_queue_wq_desc_csum_l4(wq, skb,
 664                 pci_map_single(enic->pdev, skb->data,
 665                         head_len, PCI_DMA_TODEVICE),
 666                 head_len,
 667                 csum_offset,
 668                 hdr_len,
 669                 vlan_tag_insert, vlan_tag,
 670                 eop, loopback);
 671
 672         if (!eop)
 673                 enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
 674 }
 675
 676 static inline void enic_queue_wq_skb_tso(struct enic *enic,
 677         struct vnic_wq *wq, struct sk_buff *skb, unsigned int mss,
 678         int vlan_tag_insert, unsigned int vlan_tag, int loopback)
 679 {
 680         unsigned int frag_len_left = skb_headlen(skb);
 681         unsigned int len_left = skb->len - frag_len_left;
 682         unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
 683         int eop = (len_left == 0);
 684         unsigned int len;
 685         dma_addr_t dma_addr;
 686         unsigned int offset = 0;
 687         skb_frag_t *frag;
 688
 689         /* Preload TCP csum field with IP pseudo hdr calculated
 690          * with IP length set to zero.  HW will later add in length
 691          * to each TCP segment resulting from the TSO.
 692          */
 693
 694         if (skb->protocol == cpu_to_be16(ETH_P_IP)) {
 695                 ip_hdr(skb)->check = 0;
 696                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr,
 697                         ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
 698         } else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) {
 699                 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
 700                         &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
 701         }
 702
 703         /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
 704          * for the main skb fragment
 705          */
 706         while (frag_len_left) {
 707                 len = min(frag_len_left, (unsigned int)WQ_ENET_MAX_DESC_LEN);
 708                 dma_addr = pci_map_single(enic->pdev, skb->data + offset,
 709                                 len, PCI_DMA_TODEVICE);
 710                 enic_queue_wq_desc_tso(wq, skb,
 711                         dma_addr,
 712                         len,
 713                         mss, hdr_len,
 714                         vlan_tag_insert, vlan_tag,
 715                         eop && (len == frag_len_left), loopback);
 716                 frag_len_left -= len;
 717                 offset += len;
 718         }
 719
 720         if (eop)
 721                 return;
 722
 723         /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
 724          * for additional data fragments
 725          */
 726         for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
 727                 len_left -= skb_frag_size(frag);
 728                 frag_len_left = skb_frag_size(frag);
 729                 offset = 0;
 730
 731                 while (frag_len_left) {
 732                         len = min(frag_len_left,
 733                                 (unsigned int)WQ_ENET_MAX_DESC_LEN);
 734                         dma_addr = skb_frag_dma_map(&enic->pdev->dev, frag,
 735                                                     offset, len,
 736                                                     DMA_TO_DEVICE);
 737                         enic_queue_wq_desc_cont(wq, skb,
 738                                 dma_addr,
 739                                 len,
 740                                 (len_left == 0) &&
 741                                 (len == frag_len_left),         /* EOP? */
 742                                 loopback);
 743                         frag_len_left -= len;
 744                         offset += len;
 745                 }
 746         }
 747 }
 748
 749 static inline void enic_queue_wq_skb(struct enic *enic,
 750         struct vnic_wq *wq, struct sk_buff *skb)
 751 {
 752         unsigned int mss = skb_shinfo(skb)->gso_size;
 753         unsigned int vlan_tag = 0;
 754         int vlan_tag_insert = 0;
 755         int loopback = 0;
 756
 757         if (vlan_tx_tag_present(skb)) {
 758                 /* VLAN tag from trunking driver */
 759                 vlan_tag_insert = 1;
 760                 vlan_tag = vlan_tx_tag_get(skb);
 761         } else if (enic->loop_enable) {
 762                 vlan_tag = enic->loop_tag;
 763                 loopback = 1;
 764         }
 765
 766         if (mss)
 767                 enic_queue_wq_skb_tso(enic, wq, skb, mss,
 768                         vlan_tag_insert, vlan_tag, loopback);
 769         else if (skb->ip_summed == CHECKSUM_PARTIAL)
 770                 enic_queue_wq_skb_csum_l4(enic, wq, skb,
 771                         vlan_tag_insert, vlan_tag, loopback);
 772         else
 773                 enic_queue_wq_skb_vlan(enic, wq, skb,
 774                         vlan_tag_insert, vlan_tag, loopback);
 775 }
 776
 777 /* netif_tx_lock held, process context with BHs disabled, or BH */
 778 static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb,
 779         struct net_device *netdev)
 780 {
 781         struct enic *enic = netdev_priv(netdev);
 782         struct vnic_wq *wq = &enic->wq[0];
 783         unsigned long flags;
 784
 785         if (skb->len <= 0) {
 786                 dev_kfree_skb(skb);
 787                 return NETDEV_TX_OK;
 788         }
 789
 790         /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs,
 791          * which is very likely.  In the off chance it's going to take
 792          * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb.
 793          */
 794
 795         if (skb_shinfo(skb)->gso_size == 0 &&
 796             skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC &&
 797             skb_linearize(skb)) {
 798                 dev_kfree_skb(skb);
 799                 return NETDEV_TX_OK;
 800         }
 801
 802         spin_lock_irqsave(&enic->wq_lock[0], flags);
 803
 804         if (vnic_wq_desc_avail(wq) <
 805             skb_shinfo(skb)->nr_frags + ENIC_DESC_MAX_SPLITS) {
 806                 netif_stop_queue(netdev);
 807                 /* This is a hard error, log it */
 808                 netdev_err(netdev, "BUG! Tx ring full when queue awake!\n");
 809                 spin_unlock_irqrestore(&enic->wq_lock[0], flags);
 810                 return NETDEV_TX_BUSY;
 811         }
 812
 813         enic_queue_wq_skb(enic, wq, skb);
 814
 815         if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS)
 816                 netif_stop_queue(netdev);
 817
 818         spin_unlock_irqrestore(&enic->wq_lock[0], flags);
 819
 820         return NETDEV_TX_OK;
 821 }
 822
 823 /* dev_base_lock rwlock held, nominally process context */
 824 static struct rtnl_link_stats64 *enic_get_stats(struct net_device *netdev,
 825                                                 struct rtnl_link_stats64 *net_stats)
 826 {
 827         struct enic *enic = netdev_priv(netdev);
 828         struct vnic_stats *stats;
 829
 830         enic_dev_stats_dump(enic, &stats);
 831
 832         net_stats->tx_packets = stats->tx.tx_frames_ok;
 833         net_stats->tx_bytes = stats->tx.tx_bytes_ok;
 834         net_stats->tx_errors = stats->tx.tx_errors;
 835         net_stats->tx_dropped = stats->tx.tx_drops;
 836
 837         net_stats->rx_packets = stats->rx.rx_frames_ok;
 838         net_stats->rx_bytes = stats->rx.rx_bytes_ok;
 839         net_stats->rx_errors = stats->rx.rx_errors;
 840         net_stats->multicast = stats->rx.rx_multicast_frames_ok;
 841         net_stats->rx_over_errors = enic->rq_truncated_pkts;
 842         net_stats->rx_crc_errors = enic->rq_bad_fcs;
 843         net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop;
 844
 845         return net_stats;
 846 }
 847
 848 void enic_reset_addr_lists(struct enic *enic)
 849 {
 850         enic->mc_count = 0;
 851         enic->uc_count = 0;
 852         enic->flags = 0;
 853 }
 854
 855 static int enic_set_mac_addr(struct net_device *netdev, char *addr)
 856 {
 857         struct enic *enic = netdev_priv(netdev);
 858
 859         if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) {
 860                 if (!is_valid_ether_addr(addr) && !is_zero_ether_addr(addr))
 861                         return -EADDRNOTAVAIL;
 862         } else {
 863                 if (!is_valid_ether_addr(addr))
 864                         return -EADDRNOTAVAIL;
 865         }
 866
 867         memcpy(netdev->dev_addr, addr, netdev->addr_len);
 868         netdev->addr_assign_type &= ~NET_ADDR_RANDOM;
 869
 870         return 0;
 871 }
 872
 873 static int enic_set_mac_address_dynamic(struct net_device *netdev, void *p)
 874 {
 875         struct enic *enic = netdev_priv(netdev);
 876         struct sockaddr *saddr = p;
 877         char *addr = saddr->sa_data;
 878         int err;
 879
 880         if (netif_running(enic->netdev)) {
 881                 err = enic_dev_del_station_addr(enic);
 882                 if (err)
 883                         return err;
 884         }
 885
 886         err = enic_set_mac_addr(netdev, addr);
 887         if (err)
 888                 return err;
 889
 890         if (netif_running(enic->netdev)) {
 891                 err = enic_dev_add_station_addr(enic);
 892                 if (err)
 893                         return err;
 894         }
 895
 896         return err;
 897 }
 898
 899 static int enic_set_mac_address(struct net_device *netdev, void *p)
 900 {
 901         struct sockaddr *saddr = p;
 902         char *addr = saddr->sa_data;
 903         struct enic *enic = netdev_priv(netdev);
 904         int err;
 905
 906         err = enic_dev_del_station_addr(enic);
 907         if (err)
 908                 return err;
 909
 910         err = enic_set_mac_addr(netdev, addr);
 911         if (err)
 912                 return err;
 913
 914         return enic_dev_add_station_addr(enic);
 915 }
 916
 917 static void enic_update_multicast_addr_list(struct enic *enic)
 918 {
 919         struct net_device *netdev = enic->netdev;
 920         struct netdev_hw_addr *ha;
 921         unsigned int mc_count = netdev_mc_count(netdev);
 922         u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN];
 923         unsigned int i, j;
 924
 925         if (mc_count > ENIC_MULTICAST_PERFECT_FILTERS) {
 926                 netdev_warn(netdev, "Registering only %d out of %d "
 927                         "multicast addresses\n",
 928                         ENIC_MULTICAST_PERFECT_FILTERS, mc_count);
 929                 mc_count = ENIC_MULTICAST_PERFECT_FILTERS;
 930         }
 931
 932         /* Is there an easier way?  Trying to minimize to
 933          * calls to add/del multicast addrs.  We keep the
 934          * addrs from the last call in enic->mc_addr and
 935          * look for changes to add/del.
 936          */
 937
 938         i = 0;
 939         netdev_for_each_mc_addr(ha, netdev) {
 940                 if (i == mc_count)
 941                         break;
 942                 memcpy(mc_addr[i++], ha->addr, ETH_ALEN);
 943         }
 944
 945         for (i = 0; i < enic->mc_count; i++) {
 946                 for (j = 0; j < mc_count; j++)
 947                         if (compare_ether_addr(enic->mc_addr[i],
 948                                 mc_addr[j]) == 0)
 949                                 break;
 950                 if (j == mc_count)
 951                         enic_dev_del_addr(enic, enic->mc_addr[i]);
 952         }
 953
 954         for (i = 0; i < mc_count; i++) {
 955                 for (j = 0; j < enic->mc_count; j++)
 956                         if (compare_ether_addr(mc_addr[i],
 957                                 enic->mc_addr[j]) == 0)
 958                                 break;
 959                 if (j == enic->mc_count)
 960                         enic_dev_add_addr(enic, mc_addr[i]);
 961         }
 962
 963         /* Save the list to compare against next time
 964          */
 965
 966         for (i = 0; i < mc_count; i++)
 967                 memcpy(enic->mc_addr[i], mc_addr[i], ETH_ALEN);
 968
 969         enic->mc_count = mc_count;
 970 }
 971
 972 static void enic_update_unicast_addr_list(struct enic *enic)
 973 {
 974         struct net_device *netdev = enic->netdev;
 975         struct netdev_hw_addr *ha;
 976         unsigned int uc_count = netdev_uc_count(netdev);
 977         u8 uc_addr[ENIC_UNICAST_PERFECT_FILTERS][ETH_ALEN];
 978         unsigned int i, j;
 979
 980         if (uc_count > ENIC_UNICAST_PERFECT_FILTERS) {
 981                 netdev_warn(netdev, "Registering only %d out of %d "
 982                         "unicast addresses\n",
 983                         ENIC_UNICAST_PERFECT_FILTERS, uc_count);
 984                 uc_count = ENIC_UNICAST_PERFECT_FILTERS;
 985         }
 986
 987         /* Is there an easier way?  Trying to minimize to
 988          * calls to add/del unicast addrs.  We keep the
 989          * addrs from the last call in enic->uc_addr and
 990          * look for changes to add/del.
 991          */
 992
 993         i = 0;
 994         netdev_for_each_uc_addr(ha, netdev) {
 995                 if (i == uc_count)
 996                         break;
 997                 memcpy(uc_addr[i++], ha->addr, ETH_ALEN);
 998         }
 999
1000         for (i = 0; i < enic->uc_count; i++) {
1001                 for (j = 0; j < uc_count; j++)
1002                         if (compare_ether_addr(enic->uc_addr[i],
1003                                 uc_addr[j]) == 0)
1004                                 break;
1005                 if (j == uc_count)
1006                         enic_dev_del_addr(enic, enic->uc_addr[i]);
1007         }
1008
1009         for (i = 0; i < uc_count; i++) {
1010                 for (j = 0; j < enic->uc_count; j++)
1011                         if (compare_ether_addr(uc_addr[i],
1012                                 enic->uc_addr[j]) == 0)
1013                                 break;
1014                 if (j == enic->uc_count)
1015                         enic_dev_add_addr(enic, uc_addr[i]);
1016         }
1017
1018         /* Save the list to compare against next time
1019          */
1020
1021         for (i = 0; i < uc_count; i++)
1022                 memcpy(enic->uc_addr[i], uc_addr[i], ETH_ALEN);
1023
1024         enic->uc_count = uc_count;
1025 }
1026
1027 /* netif_tx_lock held, BHs disabled */
1028 static void enic_set_rx_mode(struct net_device *netdev)
1029 {
1030         struct enic *enic = netdev_priv(netdev);
1031         int directed = 1;
1032         int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0;
1033         int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0;
1034         int promisc = (netdev->flags & IFF_PROMISC) ||
1035                 netdev_uc_count(netdev) > ENIC_UNICAST_PERFECT_FILTERS;
1036         int allmulti = (netdev->flags & IFF_ALLMULTI) ||
1037                 netdev_mc_count(netdev) > ENIC_MULTICAST_PERFECT_FILTERS;
1038         unsigned int flags = netdev->flags |
1039                 (allmulti ? IFF_ALLMULTI : 0) |
1040                 (promisc ? IFF_PROMISC : 0);
1041
1042         if (enic->flags != flags) {
1043                 enic->flags = flags;
1044                 enic_dev_packet_filter(enic, directed,
1045                         multicast, broadcast, promisc, allmulti);
1046         }
1047
1048         if (!promisc) {
1049                 enic_update_unicast_addr_list(enic);
1050                 if (!allmulti)
1051                         enic_update_multicast_addr_list(enic);
1052         }
1053 }
1054
1055 /* netif_tx_lock held, BHs disabled */
1056 static void enic_tx_timeout(struct net_device *netdev)
1057 {
1058         struct enic *enic = netdev_priv(netdev);
1059         schedule_work(&enic->reset);
1060 }
1061
1062 static int enic_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
1063 {
1064         struct enic *enic = netdev_priv(netdev);
1065         struct enic_port_profile *pp;
1066         int err;
1067
1068         ENIC_PP_BY_INDEX(enic, vf, pp, &err);
1069         if (err)
1070                 return err;
1071
1072         if (is_valid_ether_addr(mac) || is_zero_ether_addr(mac)) {
1073                 if (vf == PORT_SELF_VF) {
1074                         memcpy(pp->vf_mac, mac, ETH_ALEN);
1075                         return 0;
1076                 } else {
1077                         /*
1078                          * For sriov vf's set the mac in hw
1079                          */
1080                         ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic,
1081                                 vnic_dev_set_mac_addr, mac);
1082                         return enic_dev_status_to_errno(err);
1083                 }
1084         } else
1085                 return -EINVAL;
1086 }
1087
1088 static int enic_set_vf_port(struct net_device *netdev, int vf,
1089         struct nlattr *port[])
1090 {
1091         struct enic *enic = netdev_priv(netdev);
1092         struct enic_port_profile prev_pp;
1093         struct enic_port_profile *pp;
1094         int err = 0, restore_pp = 1;
1095
1096         ENIC_PP_BY_INDEX(enic, vf, pp, &err);
1097         if (err)
1098                 return err;
1099
1100         if (!port[IFLA_PORT_REQUEST])
1101                 return -EOPNOTSUPP;
1102
1103         memcpy(&prev_pp, pp, sizeof(*enic->pp));
1104         memset(pp, 0, sizeof(*enic->pp));
1105
1106         pp->set |= ENIC_SET_REQUEST;
1107         pp->request = nla_get_u8(port[IFLA_PORT_REQUEST]);
1108
1109         if (port[IFLA_PORT_PROFILE]) {
1110                 pp->set |= ENIC_SET_NAME;
1111                 memcpy(pp->name, nla_data(port[IFLA_PORT_PROFILE]),
1112                         PORT_PROFILE_MAX);
1113         }
1114
1115         if (port[IFLA_PORT_INSTANCE_UUID]) {
1116                 pp->set |= ENIC_SET_INSTANCE;
1117                 memcpy(pp->instance_uuid,
1118                         nla_data(port[IFLA_PORT_INSTANCE_UUID]), PORT_UUID_MAX);
1119         }
1120
1121         if (port[IFLA_PORT_HOST_UUID]) {
1122                 pp->set |= ENIC_SET_HOST;
1123                 memcpy(pp->host_uuid,
1124                         nla_data(port[IFLA_PORT_HOST_UUID]), PORT_UUID_MAX);
1125         }
1126
1127         if (vf == PORT_SELF_VF) {
1128                 /* Special case handling: mac came from IFLA_VF_MAC */
1129                 if (!is_zero_ether_addr(prev_pp.vf_mac))
1130                         memcpy(pp->mac_addr, prev_pp.vf_mac, ETH_ALEN);
1131
1132                 if (is_zero_ether_addr(netdev->dev_addr))
1133                         eth_hw_addr_random(netdev);
1134         } else {
1135                 /* SR-IOV VF: get mac from adapter */
1136                 ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic,
1137                         vnic_dev_get_mac_addr, pp->mac_addr);
1138                 if (err) {
1139                         netdev_err(netdev, "Error getting mac for vf %d\n", vf);
1140                         memcpy(pp, &prev_pp, sizeof(*pp));
1141                         return enic_dev_status_to_errno(err);
1142                 }
1143         }
1144
1145         err = enic_process_set_pp_request(enic, vf, &prev_pp, &restore_pp);
1146         if (err) {
1147                 if (restore_pp) {
1148                         /* Things are still the way they were: Implicit
1149                          * DISASSOCIATE failed
1150                          */
1151                         memcpy(pp, &prev_pp, sizeof(*pp));
1152                 } else {
1153                         memset(pp, 0, sizeof(*pp));
1154                         if (vf == PORT_SELF_VF)
1155                                 memset(netdev->dev_addr, 0, ETH_ALEN);
1156                 }
1157         } else {
1158                 /* Set flag to indicate that the port assoc/disassoc
1159                  * request has been sent out to fw
1160                  */
1161                 pp->set |= ENIC_PORT_REQUEST_APPLIED;
1162
1163                 /* If DISASSOCIATE, clean up all assigned/saved macaddresses */
1164                 if (pp->request == PORT_REQUEST_DISASSOCIATE) {
1165                         memset(pp->mac_addr, 0, ETH_ALEN);
1166                         if (vf == PORT_SELF_VF)
1167                                 memset(netdev->dev_addr, 0, ETH_ALEN);
1168                 }
1169         }
1170
1171         if (vf == PORT_SELF_VF)
1172                 memset(pp->vf_mac, 0, ETH_ALEN);
1173
1174         return err;
1175 }
1176
1177 static int enic_get_vf_port(struct net_device *netdev, int vf,
1178         struct sk_buff *skb)
1179 {
1180         struct enic *enic = netdev_priv(netdev);
1181         u16 response = PORT_PROFILE_RESPONSE_SUCCESS;
1182         struct enic_port_profile *pp;
1183         int err;
1184
1185         ENIC_PP_BY_INDEX(enic, vf, pp, &err);
1186         if (err)
1187                 return err;
1188
1189         if (!(pp->set & ENIC_PORT_REQUEST_APPLIED))
1190                 return -ENODATA;
1191
1192         err = enic_process_get_pp_request(enic, vf, pp->request, &response);
1193         if (err)
1194                 return err;
1195
1196         NLA_PUT_U16(skb, IFLA_PORT_REQUEST, pp->request);
1197         NLA_PUT_U16(skb, IFLA_PORT_RESPONSE, response);
1198         if (pp->set & ENIC_SET_NAME)
1199                 NLA_PUT(skb, IFLA_PORT_PROFILE, PORT_PROFILE_MAX,
1200                         pp->name);
1201         if (pp->set & ENIC_SET_INSTANCE)
1202                 NLA_PUT(skb, IFLA_PORT_INSTANCE_UUID, PORT_UUID_MAX,
1203                         pp->instance_uuid);
1204         if (pp->set & ENIC_SET_HOST)
1205                 NLA_PUT(skb, IFLA_PORT_HOST_UUID, PORT_UUID_MAX,
1206                         pp->host_uuid);
1207
1208         return 0;
1209
1210 nla_put_failure:
1211         return -EMSGSIZE;
1212 }
1213
1214 static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
1215 {
1216         struct enic *enic = vnic_dev_priv(rq->vdev);
1217
1218         if (!buf->os_buf)
1219                 return;
1220
1221         pci_unmap_single(enic->pdev, buf->dma_addr,
1222                 buf->len, PCI_DMA_FROMDEVICE);
1223         dev_kfree_skb_any(buf->os_buf);
1224 }
1225
1226 static int enic_rq_alloc_buf(struct vnic_rq *rq)
1227 {
1228         struct enic *enic = vnic_dev_priv(rq->vdev);
1229         struct net_device *netdev = enic->netdev;
1230         struct sk_buff *skb;
1231         unsigned int len = netdev->mtu + VLAN_ETH_HLEN;
1232         unsigned int os_buf_index = 0;
1233         dma_addr_t dma_addr;
1234
1235         skb = netdev_alloc_skb_ip_align(netdev, len);
1236         if (!skb)
1237                 return -ENOMEM;
1238
1239         dma_addr = pci_map_single(enic->pdev, skb->data,
1240                 len, PCI_DMA_FROMDEVICE);
1241
1242         enic_queue_rq_desc(rq, skb, os_buf_index,
1243                 dma_addr, len);
1244
1245         return 0;
1246 }
1247
1248 static void enic_rq_indicate_buf(struct vnic_rq *rq,
1249         struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
1250         int skipped, void *opaque)
1251 {
1252         struct enic *enic = vnic_dev_priv(rq->vdev);
1253         struct net_device *netdev = enic->netdev;
1254         struct sk_buff *skb;
1255
1256         u8 type, color, eop, sop, ingress_port, vlan_stripped;
1257         u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
1258         u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
1259         u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
1260         u8 packet_error;
1261         u16 q_number, completed_index, bytes_written, vlan_tci, checksum;
1262         u32 rss_hash;
1263
1264         if (skipped)
1265                 return;
1266
1267         skb = buf->os_buf;
1268         prefetch(skb->data - NET_IP_ALIGN);
1269         pci_unmap_single(enic->pdev, buf->dma_addr,
1270                 buf->len, PCI_DMA_FROMDEVICE);
1271
1272         cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
1273                 &type, &color, &q_number, &completed_index,
1274                 &ingress_port, &fcoe, &eop, &sop, &rss_type,
1275                 &csum_not_calc, &rss_hash, &bytes_written,
1276                 &packet_error, &vlan_stripped, &vlan_tci, &checksum,
1277                 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
1278                 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
1279                 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
1280                 &fcs_ok);
1281
1282         if (packet_error) {
1283
1284                 if (!fcs_ok) {
1285                         if (bytes_written > 0)
1286                                 enic->rq_bad_fcs++;
1287                         else if (bytes_written == 0)
1288                                 enic->rq_truncated_pkts++;
1289                 }
1290
1291                 dev_kfree_skb_any(skb);
1292
1293                 return;
1294         }
1295
1296         if (eop && bytes_written > 0) {
1297
1298                 /* Good receive
1299                  */
1300
1301                 skb_put(skb, bytes_written);
1302                 skb->protocol = eth_type_trans(skb, netdev);
1303
1304                 if ((netdev->features & NETIF_F_RXCSUM) && !csum_not_calc) {
1305                         skb->csum = htons(checksum);
1306                         skb->ip_summed = CHECKSUM_COMPLETE;
1307                 }
1308
1309                 skb->dev = netdev;
1310
1311                 if (vlan_stripped)
1312                         __vlan_hwaccel_put_tag(skb, vlan_tci);
1313
1314                 if (netdev->features & NETIF_F_GRO)
1315                         napi_gro_receive(&enic->napi[q_number], skb);
1316                 else
1317                         netif_receive_skb(skb);
1318         } else {
1319
1320                 /* Buffer overflow
1321                  */
1322
1323                 dev_kfree_skb_any(skb);
1324         }
1325 }
1326
1327 static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
1328         u8 type, u16 q_number, u16 completed_index, void *opaque)
1329 {
1330         struct enic *enic = vnic_dev_priv(vdev);
1331
1332         vnic_rq_service(&enic->rq[q_number], cq_desc,
1333                 completed_index, VNIC_RQ_RETURN_DESC,
1334                 enic_rq_indicate_buf, opaque);
1335
1336         return 0;
1337 }
1338
1339 static int enic_poll(struct napi_struct *napi, int budget)
1340 {
1341         struct net_device *netdev = napi->dev;
1342         struct enic *enic = netdev_priv(netdev);
1343         unsigned int cq_rq = enic_cq_rq(enic, 0);
1344         unsigned int cq_wq = enic_cq_wq(enic, 0);
1345         unsigned int intr = enic_legacy_io_intr();
1346         unsigned int rq_work_to_do = budget;
1347         unsigned int wq_work_to_do = -1; /* no limit */
1348         unsigned int  work_done, rq_work_done, wq_work_done;
1349         int err;
1350
1351         /* Service RQ (first) and WQ
1352          */
1353
1354         rq_work_done = vnic_cq_service(&enic->cq[cq_rq],
1355                 rq_work_to_do, enic_rq_service, NULL);
1356
1357         wq_work_done = vnic_cq_service(&enic->cq[cq_wq],
1358                 wq_work_to_do, enic_wq_service, NULL);
1359
1360         /* Accumulate intr event credits for this polling
1361          * cycle.  An intr event is the completion of a
1362          * a WQ or RQ packet.
1363          */
1364
1365         work_done = rq_work_done + wq_work_done;
1366
1367         if (work_done > 0)
1368                 vnic_intr_return_credits(&enic->intr[intr],
1369                         work_done,
1370                         0 /* don't unmask intr */,
1371                         0 /* don't reset intr timer */);
1372
1373         err = vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1374
1375         /* Buffer allocation failed. Stay in polling
1376          * mode so we can try to fill the ring again.
1377          */
1378
1379         if (err)
1380                 rq_work_done = rq_work_to_do;
1381
1382         if (rq_work_done < rq_work_to_do) {
1383
1384                 /* Some work done, but not enough to stay in polling,
1385                  * exit polling
1386                  */
1387
1388                 napi_complete(napi);
1389                 vnic_intr_unmask(&enic->intr[intr]);
1390         }
1391
1392         return rq_work_done;
1393 }
1394
1395 static int enic_poll_msix(struct napi_struct *napi, int budget)
1396 {
1397         struct net_device *netdev = napi->dev;
1398         struct enic *enic = netdev_priv(netdev);
1399         unsigned int rq = (napi - &enic->napi[0]);
1400         unsigned int cq = enic_cq_rq(enic, rq);
1401         unsigned int intr = enic_msix_rq_intr(enic, rq);
1402         unsigned int work_to_do = budget;
1403         unsigned int work_done;
1404         int err;
1405
1406         /* Service RQ
1407          */
1408
1409         work_done = vnic_cq_service(&enic->cq[cq],
1410                 work_to_do, enic_rq_service, NULL);
1411
1412         /* Return intr event credits for this polling
1413          * cycle.  An intr event is the completion of a
1414          * RQ packet.
1415          */
1416
1417         if (work_done > 0)
1418                 vnic_intr_return_credits(&enic->intr[intr],
1419                         work_done,
1420                         0 /* don't unmask intr */,
1421                         0 /* don't reset intr timer */);
1422
1423         err = vnic_rq_fill(&enic->rq[rq], enic_rq_alloc_buf);
1424
1425         /* Buffer allocation failed. Stay in polling mode
1426          * so we can try to fill the ring again.
1427          */
1428
1429         if (err)
1430                 work_done = work_to_do;
1431
1432         if (work_done < work_to_do) {
1433
1434                 /* Some work done, but not enough to stay in polling,
1435                  * exit polling
1436                  */
1437
1438                 napi_complete(napi);
1439                 vnic_intr_unmask(&enic->intr[intr]);
1440         }
1441
1442         return work_done;
1443 }
1444
1445 static void enic_notify_timer(unsigned long data)
1446 {
1447         struct enic *enic = (struct enic *)data;
1448
1449         enic_notify_check(enic);
1450
1451         mod_timer(&enic->notify_timer,
1452                 round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD));
1453 }
1454
1455 static void enic_free_intr(struct enic *enic)
1456 {
1457         struct net_device *netdev = enic->netdev;
1458         unsigned int i;
1459
1460         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1461         case VNIC_DEV_INTR_MODE_INTX:
1462                 free_irq(enic->pdev->irq, netdev);
1463                 break;
1464         case VNIC_DEV_INTR_MODE_MSI:
1465                 free_irq(enic->pdev->irq, enic);
1466                 break;
1467         case VNIC_DEV_INTR_MODE_MSIX:
1468                 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1469                         if (enic->msix[i].requested)
1470                                 free_irq(enic->msix_entry[i].vector,
1471                                         enic->msix[i].devid);
1472                 break;
1473         default:
1474                 break;
1475         }
1476 }
1477
1478 static int enic_request_intr(struct enic *enic)
1479 {
1480         struct net_device *netdev = enic->netdev;
1481         unsigned int i, intr;
1482         int err = 0;
1483
1484         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1485
1486         case VNIC_DEV_INTR_MODE_INTX:
1487
1488                 err = request_irq(enic->pdev->irq, enic_isr_legacy,
1489                         IRQF_SHARED, netdev->name, netdev);
1490                 break;
1491
1492         case VNIC_DEV_INTR_MODE_MSI:
1493
1494                 err = request_irq(enic->pdev->irq, enic_isr_msi,
1495                         0, netdev->name, enic);
1496                 break;
1497
1498         case VNIC_DEV_INTR_MODE_MSIX:
1499
1500                 for (i = 0; i < enic->rq_count; i++) {
1501                         intr = enic_msix_rq_intr(enic, i);
1502                         sprintf(enic->msix[intr].devname,
1503                                 "%.11s-rx-%d", netdev->name, i);
1504                         enic->msix[intr].isr = enic_isr_msix_rq;
1505                         enic->msix[intr].devid = &enic->napi[i];
1506                 }
1507
1508                 for (i = 0; i < enic->wq_count; i++) {
1509                         intr = enic_msix_wq_intr(enic, i);
1510                         sprintf(enic->msix[intr].devname,
1511                                 "%.11s-tx-%d", netdev->name, i);
1512                         enic->msix[intr].isr = enic_isr_msix_wq;
1513                         enic->msix[intr].devid = enic;
1514                 }
1515
1516                 intr = enic_msix_err_intr(enic);
1517                 sprintf(enic->msix[intr].devname,
1518                         "%.11s-err", netdev->name);
1519                 enic->msix[intr].isr = enic_isr_msix_err;
1520                 enic->msix[intr].devid = enic;
1521
1522                 intr = enic_msix_notify_intr(enic);
1523                 sprintf(enic->msix[intr].devname,
1524                         "%.11s-notify", netdev->name);
1525                 enic->msix[intr].isr = enic_isr_msix_notify;
1526                 enic->msix[intr].devid = enic;
1527
1528                 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1529                         enic->msix[i].requested = 0;
1530
1531                 for (i = 0; i < enic->intr_count; i++) {
1532                         err = request_irq(enic->msix_entry[i].vector,
1533                                 enic->msix[i].isr, 0,
1534                                 enic->msix[i].devname,
1535                                 enic->msix[i].devid);
1536                         if (err) {
1537                                 enic_free_intr(enic);
1538                                 break;
1539                         }
1540                         enic->msix[i].requested = 1;
1541                 }
1542
1543                 break;
1544
1545         default:
1546                 break;
1547         }
1548
1549         return err;
1550 }
1551
1552 static void enic_synchronize_irqs(struct enic *enic)
1553 {
1554         unsigned int i;
1555
1556         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1557         case VNIC_DEV_INTR_MODE_INTX:
1558         case VNIC_DEV_INTR_MODE_MSI:
1559                 synchronize_irq(enic->pdev->irq);
1560                 break;
1561         case VNIC_DEV_INTR_MODE_MSIX:
1562                 for (i = 0; i < enic->intr_count; i++)
1563                         synchronize_irq(enic->msix_entry[i].vector);
1564                 break;
1565         default:
1566                 break;
1567         }
1568 }
1569
1570 static int enic_dev_notify_set(struct enic *enic)
1571 {
1572         int err;
1573
1574         spin_lock(&enic->devcmd_lock);
1575         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1576         case VNIC_DEV_INTR_MODE_INTX:
1577                 err = vnic_dev_notify_set(enic->vdev,
1578                         enic_legacy_notify_intr());
1579                 break;
1580         case VNIC_DEV_INTR_MODE_MSIX:
1581                 err = vnic_dev_notify_set(enic->vdev,
1582                         enic_msix_notify_intr(enic));
1583                 break;
1584         default:
1585                 err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */);
1586                 break;
1587         }
1588         spin_unlock(&enic->devcmd_lock);
1589
1590         return err;
1591 }
1592
1593 static void enic_notify_timer_start(struct enic *enic)
1594 {
1595         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1596         case VNIC_DEV_INTR_MODE_MSI:
1597                 mod_timer(&enic->notify_timer, jiffies);
1598                 break;
1599         default:
1600                 /* Using intr for notification for INTx/MSI-X */
1601                 break;
1602         }
1603 }
1604
1605 /* rtnl lock is held, process context */
1606 static int enic_open(struct net_device *netdev)
1607 {
1608         struct enic *enic = netdev_priv(netdev);
1609         unsigned int i;
1610         int err;
1611
1612         err = enic_request_intr(enic);
1613         if (err) {
1614                 netdev_err(netdev, "Unable to request irq.\n");
1615                 return err;
1616         }
1617
1618         err = enic_dev_notify_set(enic);
1619         if (err) {
1620                 netdev_err(netdev,
1621                         "Failed to alloc notify buffer, aborting.\n");
1622                 goto err_out_free_intr;
1623         }
1624
1625         for (i = 0; i < enic->rq_count; i++) {
1626                 vnic_rq_fill(&enic->rq[i], enic_rq_alloc_buf);
1627                 /* Need at least one buffer on ring to get going */
1628                 if (vnic_rq_desc_used(&enic->rq[i]) == 0) {
1629                         netdev_err(netdev, "Unable to alloc receive buffers\n");
1630                         err = -ENOMEM;
1631                         goto err_out_notify_unset;
1632                 }
1633         }
1634
1635         for (i = 0; i < enic->wq_count; i++)
1636                 vnic_wq_enable(&enic->wq[i]);
1637         for (i = 0; i < enic->rq_count; i++)
1638                 vnic_rq_enable(&enic->rq[i]);
1639
1640         if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic))
1641                 enic_dev_add_station_addr(enic);
1642
1643         enic_set_rx_mode(netdev);
1644
1645         netif_wake_queue(netdev);
1646
1647         for (i = 0; i < enic->rq_count; i++)
1648                 napi_enable(&enic->napi[i]);
1649
1650         enic_dev_enable(enic);
1651
1652         for (i = 0; i < enic->intr_count; i++)
1653                 vnic_intr_unmask(&enic->intr[i]);
1654
1655         enic_notify_timer_start(enic);
1656
1657         return 0;
1658
1659 err_out_notify_unset:
1660         enic_dev_notify_unset(enic);
1661 err_out_free_intr:
1662         enic_free_intr(enic);
1663
1664         return err;
1665 }
1666
1667 /* rtnl lock is held, process context */
1668 static int enic_stop(struct net_device *netdev)
1669 {
1670         struct enic *enic = netdev_priv(netdev);
1671         unsigned int i;
1672         int err;
1673
1674         for (i = 0; i < enic->intr_count; i++) {
1675                 vnic_intr_mask(&enic->intr[i]);
1676                 (void)vnic_intr_masked(&enic->intr[i]); /* flush write */
1677         }
1678
1679         enic_synchronize_irqs(enic);
1680
1681         del_timer_sync(&enic->notify_timer);
1682
1683         enic_dev_disable(enic);
1684
1685         for (i = 0; i < enic->rq_count; i++)
1686                 napi_disable(&enic->napi[i]);
1687
1688         netif_carrier_off(netdev);
1689         netif_tx_disable(netdev);
1690
1691         if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic))
1692                 enic_dev_del_station_addr(enic);
1693
1694         for (i = 0; i < enic->wq_count; i++) {
1695                 err = vnic_wq_disable(&enic->wq[i]);
1696                 if (err)
1697                         return err;
1698         }
1699         for (i = 0; i < enic->rq_count; i++) {
1700                 err = vnic_rq_disable(&enic->rq[i]);
1701                 if (err)
1702                         return err;
1703         }
1704
1705         enic_dev_notify_unset(enic);
1706         enic_free_intr(enic);
1707
1708         for (i = 0; i < enic->wq_count; i++)
1709                 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
1710         for (i = 0; i < enic->rq_count; i++)
1711                 vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
1712         for (i = 0; i < enic->cq_count; i++)
1713                 vnic_cq_clean(&enic->cq[i]);
1714         for (i = 0; i < enic->intr_count; i++)
1715                 vnic_intr_clean(&enic->intr[i]);
1716
1717         return 0;
1718 }
1719
1720 static int enic_change_mtu(struct net_device *netdev, int new_mtu)
1721 {
1722         struct enic *enic = netdev_priv(netdev);
1723         int running = netif_running(netdev);
1724
1725         if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU)
1726                 return -EINVAL;
1727
1728         if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic))
1729                 return -EOPNOTSUPP;
1730
1731         if (running)
1732                 enic_stop(netdev);
1733
1734         netdev->mtu = new_mtu;
1735
1736         if (netdev->mtu > enic->port_mtu)
1737                 netdev_warn(netdev,
1738                         "interface MTU (%d) set higher than port MTU (%d)\n",
1739                         netdev->mtu, enic->port_mtu);
1740
1741         if (running)
1742                 enic_open(netdev);
1743
1744         return 0;
1745 }
1746
1747 static void enic_change_mtu_work(struct work_struct *work)
1748 {
1749         struct enic *enic = container_of(work, struct enic, change_mtu_work);
1750         struct net_device *netdev = enic->netdev;
1751         int new_mtu = vnic_dev_mtu(enic->vdev);
1752         int err;
1753         unsigned int i;
1754
1755         new_mtu = max_t(int, ENIC_MIN_MTU, min_t(int, ENIC_MAX_MTU, new_mtu));
1756
1757         rtnl_lock();
1758
1759         /* Stop RQ */
1760         del_timer_sync(&enic->notify_timer);
1761
1762         for (i = 0; i < enic->rq_count; i++)
1763                 napi_disable(&enic->napi[i]);
1764
1765         vnic_intr_mask(&enic->intr[0]);
1766         enic_synchronize_irqs(enic);
1767         err = vnic_rq_disable(&enic->rq[0]);
1768         if (err) {
1769                 netdev_err(netdev, "Unable to disable RQ.\n");
1770                 return;
1771         }
1772         vnic_rq_clean(&enic->rq[0], enic_free_rq_buf);
1773         vnic_cq_clean(&enic->cq[0]);
1774         vnic_intr_clean(&enic->intr[0]);
1775
1776         /* Fill RQ with new_mtu-sized buffers */
1777         netdev->mtu = new_mtu;
1778         vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1779         /* Need at least one buffer on ring to get going */
1780         if (vnic_rq_desc_used(&enic->rq[0]) == 0) {
1781                 netdev_err(netdev, "Unable to alloc receive buffers.\n");
1782                 return;
1783         }
1784
1785         /* Start RQ */
1786         vnic_rq_enable(&enic->rq[0]);
1787         napi_enable(&enic->napi[0]);
1788         vnic_intr_unmask(&enic->intr[0]);
1789         enic_notify_timer_start(enic);
1790
1791         rtnl_unlock();
1792
1793         netdev_info(netdev, "interface MTU set as %d\n", netdev->mtu);
1794 }
1795
1796 #ifdef CONFIG_NET_POLL_CONTROLLER
1797 static void enic_poll_controller(struct net_device *netdev)
1798 {
1799         struct enic *enic = netdev_priv(netdev);
1800         struct vnic_dev *vdev = enic->vdev;
1801         unsigned int i, intr;
1802
1803         switch (vnic_dev_get_intr_mode(vdev)) {
1804         case VNIC_DEV_INTR_MODE_MSIX:
1805                 for (i = 0; i < enic->rq_count; i++) {
1806                         intr = enic_msix_rq_intr(enic, i);
1807                         enic_isr_msix_rq(enic->msix_entry[intr].vector,
1808                                 &enic->napi[i]);
1809                 }
1810
1811                 for (i = 0; i < enic->wq_count; i++) {
1812                         intr = enic_msix_wq_intr(enic, i);
1813                         enic_isr_msix_wq(enic->msix_entry[intr].vector, enic);
1814                 }
1815
1816                 break;
1817         case VNIC_DEV_INTR_MODE_MSI:
1818                 enic_isr_msi(enic->pdev->irq, enic);
1819                 break;
1820         case VNIC_DEV_INTR_MODE_INTX:
1821                 enic_isr_legacy(enic->pdev->irq, netdev);
1822                 break;
1823         default:
1824                 break;
1825         }
1826 }
1827 #endif
1828
1829 static int enic_dev_wait(struct vnic_dev *vdev,
1830         int (*start)(struct vnic_dev *, int),
1831         int (*finished)(struct vnic_dev *, int *),
1832         int arg)
1833 {
1834         unsigned long time;
1835         int done;
1836         int err;
1837
1838         BUG_ON(in_interrupt());
1839
1840         err = start(vdev, arg);
1841         if (err)
1842                 return err;
1843
1844         /* Wait for func to complete...2 seconds max
1845          */
1846
1847         time = jiffies + (HZ * 2);
1848         do {
1849
1850                 err = finished(vdev, &done);
1851                 if (err)
1852                         return err;
1853
1854                 if (done)
1855                         return 0;
1856
1857                 schedule_timeout_uninterruptible(HZ / 10);
1858
1859         } while (time_after(time, jiffies));
1860
1861         return -ETIMEDOUT;
1862 }
1863
1864 static int enic_dev_open(struct enic *enic)
1865 {
1866         int err;
1867
1868         err = enic_dev_wait(enic->vdev, vnic_dev_open,
1869                 vnic_dev_open_done, 0);
1870         if (err)
1871                 dev_err(enic_get_dev(enic), "vNIC device open failed, err %d\n",
1872                         err);
1873
1874         return err;
1875 }
1876
1877 static int enic_dev_hang_reset(struct enic *enic)
1878 {
1879         int err;
1880
1881         err = enic_dev_wait(enic->vdev, vnic_dev_hang_reset,
1882                 vnic_dev_hang_reset_done, 0);
1883         if (err)
1884                 netdev_err(enic->netdev, "vNIC hang reset failed, err %d\n",
1885                         err);
1886
1887         return err;
1888 }
1889
1890 static int enic_set_rsskey(struct enic *enic)
1891 {
1892         dma_addr_t rss_key_buf_pa;
1893         union vnic_rss_key *rss_key_buf_va = NULL;
1894         union vnic_rss_key rss_key = {
1895                 .key[0].b = {85, 67, 83, 97, 119, 101, 115, 111, 109, 101},
1896                 .key[1].b = {80, 65, 76, 79, 117, 110, 105, 113, 117, 101},
1897                 .key[2].b = {76, 73, 78, 85, 88, 114, 111, 99, 107, 115},
1898                 .key[3].b = {69, 78, 73, 67, 105, 115, 99, 111, 111, 108},
1899         };
1900         int err;
1901
1902         rss_key_buf_va = pci_alloc_consistent(enic->pdev,
1903                 sizeof(union vnic_rss_key), &rss_key_buf_pa);
1904         if (!rss_key_buf_va)
1905                 return -ENOMEM;
1906
1907         memcpy(rss_key_buf_va, &rss_key, sizeof(union vnic_rss_key));
1908
1909         spin_lock(&enic->devcmd_lock);
1910         err = enic_set_rss_key(enic,
1911                 rss_key_buf_pa,
1912                 sizeof(union vnic_rss_key));
1913         spin_unlock(&enic->devcmd_lock);
1914
1915         pci_free_consistent(enic->pdev, sizeof(union vnic_rss_key),
1916                 rss_key_buf_va, rss_key_buf_pa);
1917
1918         return err;
1919 }
1920
1921 static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits)
1922 {
1923         dma_addr_t rss_cpu_buf_pa;
1924         union vnic_rss_cpu *rss_cpu_buf_va = NULL;
1925         unsigned int i;
1926         int err;
1927
1928         rss_cpu_buf_va = pci_alloc_consistent(enic->pdev,
1929                 sizeof(union vnic_rss_cpu), &rss_cpu_buf_pa);
1930         if (!rss_cpu_buf_va)
1931                 return -ENOMEM;
1932
1933         for (i = 0; i < (1 << rss_hash_bits); i++)
1934                 (*rss_cpu_buf_va).cpu[i/4].b[i%4] = i % enic->rq_count;
1935
1936         spin_lock(&enic->devcmd_lock);
1937         err = enic_set_rss_cpu(enic,
1938                 rss_cpu_buf_pa,
1939                 sizeof(union vnic_rss_cpu));
1940         spin_unlock(&enic->devcmd_lock);
1941
1942         pci_free_consistent(enic->pdev, sizeof(union vnic_rss_cpu),
1943                 rss_cpu_buf_va, rss_cpu_buf_pa);
1944
1945         return err;
1946 }
1947
1948 static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu,
1949         u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable)
1950 {
1951         const u8 tso_ipid_split_en = 0;
1952         const u8 ig_vlan_strip_en = 1;
1953         int err;
1954
1955         /* Enable VLAN tag stripping.
1956         */
1957
1958         spin_lock(&enic->devcmd_lock);
1959         err = enic_set_nic_cfg(enic,
1960                 rss_default_cpu, rss_hash_type,
1961                 rss_hash_bits, rss_base_cpu,
1962                 rss_enable, tso_ipid_split_en,
1963                 ig_vlan_strip_en);
1964         spin_unlock(&enic->devcmd_lock);
1965
1966         return err;
1967 }
1968
1969 static int enic_set_rss_nic_cfg(struct enic *enic)
1970 {
1971         struct device *dev = enic_get_dev(enic);
1972         const u8 rss_default_cpu = 0;
1973         const u8 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 |
1974                 NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 |
1975                 NIC_CFG_RSS_HASH_TYPE_IPV6 |
1976                 NIC_CFG_RSS_HASH_TYPE_TCP_IPV6;
1977         const u8 rss_hash_bits = 7;
1978         const u8 rss_base_cpu = 0;
1979         u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1);
1980
1981         if (rss_enable) {
1982                 if (!enic_set_rsskey(enic)) {
1983                         if (enic_set_rsscpu(enic, rss_hash_bits)) {
1984                                 rss_enable = 0;
1985                                 dev_warn(dev, "RSS disabled, "
1986                                         "Failed to set RSS cpu indirection table.");
1987                         }
1988                 } else {
1989                         rss_enable = 0;
1990                         dev_warn(dev, "RSS disabled, Failed to set RSS key.\n");
1991                 }
1992         }
1993
1994         return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type,
1995                 rss_hash_bits, rss_base_cpu, rss_enable);
1996 }
1997
1998 static void enic_reset(struct work_struct *work)
1999 {
2000         struct enic *enic = container_of(work, struct enic, reset);
2001
2002         if (!netif_running(enic->netdev))
2003                 return;
2004
2005         rtnl_lock();
2006
2007         enic_dev_hang_notify(enic);
2008         enic_stop(enic->netdev);
2009         enic_dev_hang_reset(enic);
2010         enic_reset_addr_lists(enic);
2011         enic_init_vnic_resources(enic);
2012         enic_set_rss_nic_cfg(enic);
2013         enic_dev_set_ig_vlan_rewrite_mode(enic);
2014         enic_open(enic->netdev);
2015
2016         rtnl_unlock();
2017 }
2018
2019 static int enic_set_intr_mode(struct enic *enic)
2020 {
2021         unsigned int n = min_t(unsigned int, enic->rq_count, ENIC_RQ_MAX);
2022         unsigned int m = min_t(unsigned int, enic->wq_count, ENIC_WQ_MAX);
2023         unsigned int i;
2024
2025         /* Set interrupt mode (INTx, MSI, MSI-X) depending
2026          * on system capabilities.
2027          *
2028          * Try MSI-X first
2029          *
2030          * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs
2031          * (the second to last INTR is used for WQ/RQ errors)
2032          * (the last INTR is used for notifications)
2033          */
2034
2035         BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2);
2036         for (i = 0; i < n + m + 2; i++)
2037                 enic->msix_entry[i].entry = i;
2038
2039         /* Use multiple RQs if RSS is enabled
2040          */
2041
2042         if (ENIC_SETTING(enic, RSS) &&
2043             enic->config.intr_mode < 1 &&
2044             enic->rq_count >= n &&
2045             enic->wq_count >= m &&
2046             enic->cq_count >= n + m &&
2047             enic->intr_count >= n + m + 2) {
2048
2049                 if (!pci_enable_msix(enic->pdev, enic->msix_entry, n + m + 2)) {
2050
2051                         enic->rq_count = n;
2052                         enic->wq_count = m;
2053                         enic->cq_count = n + m;
2054                         enic->intr_count = n + m + 2;
2055
2056                         vnic_dev_set_intr_mode(enic->vdev,
2057                                 VNIC_DEV_INTR_MODE_MSIX);
2058
2059                         return 0;
2060                 }
2061         }
2062
2063         if (enic->config.intr_mode < 1 &&
2064             enic->rq_count >= 1 &&
2065             enic->wq_count >= m &&
2066             enic->cq_count >= 1 + m &&
2067             enic->intr_count >= 1 + m + 2) {
2068                 if (!pci_enable_msix(enic->pdev, enic->msix_entry, 1 + m + 2)) {
2069
2070                         enic->rq_count = 1;
2071                         enic->wq_count = m;
2072                         enic->cq_count = 1 + m;
2073                         enic->intr_count = 1 + m + 2;
2074
2075                         vnic_dev_set_intr_mode(enic->vdev,
2076                                 VNIC_DEV_INTR_MODE_MSIX);
2077
2078                         return 0;
2079                 }
2080         }
2081
2082         /* Next try MSI
2083          *
2084          * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR
2085          */
2086
2087         if (enic->config.intr_mode < 2 &&
2088             enic->rq_count >= 1 &&
2089             enic->wq_count >= 1 &&
2090             enic->cq_count >= 2 &&
2091             enic->intr_count >= 1 &&
2092             !pci_enable_msi(enic->pdev)) {
2093
2094                 enic->rq_count = 1;
2095                 enic->wq_count = 1;
2096                 enic->cq_count = 2;
2097                 enic->intr_count = 1;
2098
2099                 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI);
2100
2101                 return 0;
2102         }
2103
2104         /* Next try INTx
2105          *
2106          * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs
2107          * (the first INTR is used for WQ/RQ)
2108          * (the second INTR is used for WQ/RQ errors)
2109          * (the last INTR is used for notifications)
2110          */
2111
2112         if (enic->config.intr_mode < 3 &&
2113             enic->rq_count >= 1 &&
2114             enic->wq_count >= 1 &&
2115             enic->cq_count >= 2 &&
2116             enic->intr_count >= 3) {
2117
2118                 enic->rq_count = 1;
2119                 enic->wq_count = 1;
2120                 enic->cq_count = 2;
2121                 enic->intr_count = 3;
2122
2123                 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX);
2124
2125                 return 0;
2126         }
2127
2128         vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2129
2130         return -EINVAL;
2131 }
2132
2133 static void enic_clear_intr_mode(struct enic *enic)
2134 {
2135         switch (vnic_dev_get_intr_mode(enic->vdev)) {
2136         case VNIC_DEV_INTR_MODE_MSIX:
2137                 pci_disable_msix(enic->pdev);
2138                 break;
2139         case VNIC_DEV_INTR_MODE_MSI:
2140                 pci_disable_msi(enic->pdev);
2141                 break;
2142         default:
2143                 break;
2144         }
2145
2146         vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2147 }
2148
2149 static const struct net_device_ops enic_netdev_dynamic_ops = {
2150         .ndo_open               = enic_open,
2151         .ndo_stop               = enic_stop,
2152         .ndo_start_xmit         = enic_hard_start_xmit,
2153         .ndo_get_stats64        = enic_get_stats,
2154         .ndo_validate_addr      = eth_validate_addr,
2155         .ndo_set_rx_mode        = enic_set_rx_mode,
2156         .ndo_set_mac_address    = enic_set_mac_address_dynamic,
2157         .ndo_change_mtu         = enic_change_mtu,
2158         .ndo_vlan_rx_add_vid    = enic_vlan_rx_add_vid,
2159         .ndo_vlan_rx_kill_vid   = enic_vlan_rx_kill_vid,
2160         .ndo_tx_timeout         = enic_tx_timeout,
2161         .ndo_set_vf_port        = enic_set_vf_port,
2162         .ndo_get_vf_port        = enic_get_vf_port,
2163         .ndo_set_vf_mac         = enic_set_vf_mac,
2164 #ifdef CONFIG_NET_POLL_CONTROLLER
2165         .ndo_poll_controller    = enic_poll_controller,
2166 #endif
2167 };
2168
2169 static const struct net_device_ops enic_netdev_ops = {
2170         .ndo_open               = enic_open,
2171         .ndo_stop               = enic_stop,
2172         .ndo_start_xmit         = enic_hard_start_xmit,
2173         .ndo_get_stats64        = enic_get_stats,
2174         .ndo_validate_addr      = eth_validate_addr,
2175         .ndo_set_mac_address    = enic_set_mac_address,
2176         .ndo_set_rx_mode        = enic_set_rx_mode,
2177         .ndo_change_mtu         = enic_change_mtu,
2178         .ndo_vlan_rx_add_vid    = enic_vlan_rx_add_vid,
2179         .ndo_vlan_rx_kill_vid   = enic_vlan_rx_kill_vid,
2180         .ndo_tx_timeout         = enic_tx_timeout,
2181         .ndo_set_vf_port        = enic_set_vf_port,
2182         .ndo_get_vf_port        = enic_get_vf_port,
2183         .ndo_set_vf_mac         = enic_set_vf_mac,
2184 #ifdef CONFIG_NET_POLL_CONTROLLER
2185         .ndo_poll_controller    = enic_poll_controller,
2186 #endif
2187 };
2188
2189 static void enic_dev_deinit(struct enic *enic)
2190 {
2191         unsigned int i;
2192
2193         for (i = 0; i < enic->rq_count; i++)
2194                 netif_napi_del(&enic->napi[i]);
2195
2196         enic_free_vnic_resources(enic);
2197         enic_clear_intr_mode(enic);
2198 }
2199
2200 static int enic_dev_init(struct enic *enic)
2201 {
2202         struct device *dev = enic_get_dev(enic);
2203         struct net_device *netdev = enic->netdev;
2204         unsigned int i;
2205         int err;
2206
2207         /* Get interrupt coalesce timer info */
2208         err = enic_dev_intr_coal_timer_info(enic);
2209         if (err) {
2210                 dev_warn(dev, "Using default conversion factor for "
2211                         "interrupt coalesce timer\n");
2212                 vnic_dev_intr_coal_timer_info_default(enic->vdev);
2213         }
2214
2215         /* Get vNIC configuration
2216          */
2217
2218         err = enic_get_vnic_config(enic);
2219         if (err) {
2220                 dev_err(dev, "Get vNIC configuration failed, aborting\n");
2221                 return err;
2222         }
2223
2224         /* Get available resource counts
2225          */
2226
2227         enic_get_res_counts(enic);
2228
2229         /* Set interrupt mode based on resource counts and system
2230          * capabilities
2231          */
2232
2233         err = enic_set_intr_mode(enic);
2234         if (err) {
2235                 dev_err(dev, "Failed to set intr mode based on resource "
2236                         "counts and system capabilities, aborting\n");
2237                 return err;
2238         }
2239
2240         /* Allocate and configure vNIC resources
2241          */
2242
2243         err = enic_alloc_vnic_resources(enic);
2244         if (err) {
2245                 dev_err(dev, "Failed to alloc vNIC resources, aborting\n");
2246                 goto err_out_free_vnic_resources;
2247         }
2248
2249         enic_init_vnic_resources(enic);
2250
2251         err = enic_set_rss_nic_cfg(enic);
2252         if (err) {
2253                 dev_err(dev, "Failed to config nic, aborting\n");
2254                 goto err_out_free_vnic_resources;
2255         }
2256
2257         switch (vnic_dev_get_intr_mode(enic->vdev)) {
2258         default:
2259                 netif_napi_add(netdev, &enic->napi[0], enic_poll, 64);
2260                 break;
2261         case VNIC_DEV_INTR_MODE_MSIX:
2262                 for (i = 0; i < enic->rq_count; i++)
2263                         netif_napi_add(netdev, &enic->napi[i],
2264                                 enic_poll_msix, 64);
2265                 break;
2266         }
2267
2268         return 0;
2269
2270 err_out_free_vnic_resources:
2271         enic_clear_intr_mode(enic);
2272         enic_free_vnic_resources(enic);
2273
2274         return err;
2275 }
2276
2277 static void enic_iounmap(struct enic *enic)
2278 {
2279         unsigned int i;
2280
2281         for (i = 0; i < ARRAY_SIZE(enic->bar); i++)
2282                 if (enic->bar[i].vaddr)
2283                         iounmap(enic->bar[i].vaddr);
2284 }
2285
2286 static int __devinit enic_probe(struct pci_dev *pdev,
2287         const struct pci_device_id *ent)
2288 {
2289         struct device *dev = &pdev->dev;
2290         struct net_device *netdev;
2291         struct enic *enic;
2292         int using_dac = 0;
2293         unsigned int i;
2294         int err;
2295 #ifdef CONFIG_PCI_IOV
2296         int pos = 0;
2297 #endif
2298         int num_pps = 1;
2299
2300         /* Allocate net device structure and initialize.  Private
2301          * instance data is initialized to zero.
2302          */
2303
2304         netdev = alloc_etherdev(sizeof(struct enic));
2305         if (!netdev)
2306                 return -ENOMEM;
2307
2308         pci_set_drvdata(pdev, netdev);
2309
2310         SET_NETDEV_DEV(netdev, &pdev->dev);
2311
2312         enic = netdev_priv(netdev);
2313         enic->netdev = netdev;
2314         enic->pdev = pdev;
2315
2316         /* Setup PCI resources
2317          */
2318
2319         err = pci_enable_device_mem(pdev);
2320         if (err) {
2321                 dev_err(dev, "Cannot enable PCI device, aborting\n");
2322                 goto err_out_free_netdev;
2323         }
2324
2325         err = pci_request_regions(pdev, DRV_NAME);
2326         if (err) {
2327                 dev_err(dev, "Cannot request PCI regions, aborting\n");
2328                 goto err_out_disable_device;
2329         }
2330
2331         pci_set_master(pdev);
2332
2333         /* Query PCI controller on system for DMA addressing
2334          * limitation for the device.  Try 40-bit first, and
2335          * fail to 32-bit.
2336          */
2337
2338         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(40));
2339         if (err) {
2340                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2341                 if (err) {
2342                         dev_err(dev, "No usable DMA configuration, aborting\n");
2343                         goto err_out_release_regions;
2344                 }
2345                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
2346                 if (err) {
2347                         dev_err(dev, "Unable to obtain %u-bit DMA "
2348                                 "for consistent allocations, aborting\n", 32);
2349                         goto err_out_release_regions;
2350                 }
2351         } else {
2352                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(40));
2353                 if (err) {
2354                         dev_err(dev, "Unable to obtain %u-bit DMA "
2355                                 "for consistent allocations, aborting\n", 40);
2356                         goto err_out_release_regions;
2357                 }
2358                 using_dac = 1;
2359         }
2360
2361         /* Map vNIC resources from BAR0-5
2362          */
2363
2364         for (i = 0; i < ARRAY_SIZE(enic->bar); i++) {
2365                 if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
2366                         continue;
2367                 enic->bar[i].len = pci_resource_len(pdev, i);
2368                 enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len);
2369                 if (!enic->bar[i].vaddr) {
2370                         dev_err(dev, "Cannot memory-map BAR %d, aborting\n", i);
2371                         err = -ENODEV;
2372                         goto err_out_iounmap;
2373                 }
2374                 enic->bar[i].bus_addr = pci_resource_start(pdev, i);
2375         }
2376
2377         /* Register vNIC device
2378          */
2379
2380         enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar,
2381                 ARRAY_SIZE(enic->bar));
2382         if (!enic->vdev) {
2383                 dev_err(dev, "vNIC registration failed, aborting\n");
2384                 err = -ENODEV;
2385                 goto err_out_iounmap;
2386         }
2387
2388 #ifdef CONFIG_PCI_IOV
2389         /* Get number of subvnics */
2390         pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_SRIOV);
2391         if (pos) {
2392                 pci_read_config_word(pdev, pos + PCI_SRIOV_TOTAL_VF,
2393                         &enic->num_vfs);
2394                 if (enic->num_vfs) {
2395                         err = pci_enable_sriov(pdev, enic->num_vfs);
2396                         if (err) {
2397                                 dev_err(dev, "SRIOV enable failed, aborting."
2398                                         " pci_enable_sriov() returned %d\n",
2399                                         err);
2400                                 goto err_out_vnic_unregister;
2401                         }
2402                         enic->priv_flags |= ENIC_SRIOV_ENABLED;
2403                         num_pps = enic->num_vfs;
2404                 }
2405         }
2406 #endif
2407
2408         /* Allocate structure for port profiles */
2409         enic->pp = kcalloc(num_pps, sizeof(*enic->pp), GFP_KERNEL);
2410         if (!enic->pp) {
2411                 err = -ENOMEM;
2412                 goto err_out_disable_sriov_pp;
2413         }
2414
2415         /* Issue device open to get device in known state
2416          */
2417
2418         err = enic_dev_open(enic);
2419         if (err) {
2420                 dev_err(dev, "vNIC dev open failed, aborting\n");
2421                 goto err_out_disable_sriov;
2422         }
2423
2424         /* Setup devcmd lock
2425          */
2426
2427         spin_lock_init(&enic->devcmd_lock);
2428
2429         /*
2430          * Set ingress vlan rewrite mode before vnic initialization
2431          */
2432
2433         err = enic_dev_set_ig_vlan_rewrite_mode(enic);
2434         if (err) {
2435                 dev_err(dev,
2436                         "Failed to set ingress vlan rewrite mode, aborting.\n");
2437                 goto err_out_dev_close;
2438         }
2439
2440         /* Issue device init to initialize the vnic-to-switch link.
2441          * We'll start with carrier off and wait for link UP
2442          * notification later to turn on carrier.  We don't need
2443          * to wait here for the vnic-to-switch link initialization
2444          * to complete; link UP notification is the indication that
2445          * the process is complete.
2446          */
2447
2448         netif_carrier_off(netdev);
2449
2450         /* Do not call dev_init for a dynamic vnic.
2451          * For a dynamic vnic, init_prov_info will be
2452          * called later by an upper layer.
2453          */
2454
2455         if (!enic_is_dynamic(enic)) {
2456                 err = vnic_dev_init(enic->vdev, 0);
2457                 if (err) {
2458                         dev_err(dev, "vNIC dev init failed, aborting\n");
2459                         goto err_out_dev_close;
2460                 }
2461         }
2462
2463         err = enic_dev_init(enic);
2464         if (err) {
2465                 dev_err(dev, "Device initialization failed, aborting\n");
2466                 goto err_out_dev_close;
2467         }
2468
2469         /* Setup notification timer, HW reset task, and wq locks
2470          */
2471
2472         init_timer(&enic->notify_timer);
2473         enic->notify_timer.function = enic_notify_timer;
2474         enic->notify_timer.data = (unsigned long)enic;
2475
2476         INIT_WORK(&enic->reset, enic_reset);
2477         INIT_WORK(&enic->change_mtu_work, enic_change_mtu_work);
2478
2479         for (i = 0; i < enic->wq_count; i++)
2480                 spin_lock_init(&enic->wq_lock[i]);
2481
2482         /* Register net device
2483          */
2484
2485         enic->port_mtu = enic->config.mtu;
2486         (void)enic_change_mtu(netdev, enic->port_mtu);
2487
2488         err = enic_set_mac_addr(netdev, enic->mac_addr);
2489         if (err) {
2490                 dev_err(dev, "Invalid MAC address, aborting\n");
2491                 goto err_out_dev_deinit;
2492         }
2493
2494         enic->tx_coalesce_usecs = enic->config.intr_timer_usec;
2495         enic->rx_coalesce_usecs = enic->tx_coalesce_usecs;
2496
2497         if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic))
2498                 netdev->netdev_ops = &enic_netdev_dynamic_ops;
2499         else
2500                 netdev->netdev_ops = &enic_netdev_ops;
2501
2502         netdev->watchdog_timeo = 2 * HZ;
2503         netdev->ethtool_ops = &enic_ethtool_ops;
2504
2505         netdev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
2506         if (ENIC_SETTING(enic, LOOP)) {
2507                 netdev->features &= ~NETIF_F_HW_VLAN_TX;
2508                 enic->loop_enable = 1;
2509                 enic->loop_tag = enic->config.loop_tag;
2510                 dev_info(dev, "loopback tag=0x%04x\n", enic->loop_tag);
2511         }
2512         if (ENIC_SETTING(enic, TXCSUM))
2513                 netdev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM;
2514         if (ENIC_SETTING(enic, TSO))
2515                 netdev->hw_features |= NETIF_F_TSO |
2516                         NETIF_F_TSO6 | NETIF_F_TSO_ECN;
2517         if (ENIC_SETTING(enic, RXCSUM))
2518                 netdev->hw_features |= NETIF_F_RXCSUM;
2519
2520         netdev->features |= netdev->hw_features;
2521
2522         if (using_dac)
2523                 netdev->features |= NETIF_F_HIGHDMA;
2524
2525         netdev->priv_flags |= IFF_UNICAST_FLT;
2526
2527         err = register_netdev(netdev);
2528         if (err) {
2529                 dev_err(dev, "Cannot register net device, aborting\n");
2530                 goto err_out_dev_deinit;
2531         }
2532
2533         return 0;
2534
2535 err_out_dev_deinit:
2536         enic_dev_deinit(enic);
2537 err_out_dev_close:
2538         vnic_dev_close(enic->vdev);
2539 err_out_disable_sriov:
2540         kfree(enic->pp);
2541 err_out_disable_sriov_pp:
2542 #ifdef CONFIG_PCI_IOV
2543         if (enic_sriov_enabled(enic)) {
2544                 pci_disable_sriov(pdev);
2545                 enic->priv_flags &= ~ENIC_SRIOV_ENABLED;
2546         }
2547 err_out_vnic_unregister:
2548 #endif
2549         vnic_dev_unregister(enic->vdev);
2550 err_out_iounmap:
2551         enic_iounmap(enic);
2552 err_out_release_regions:
2553         pci_release_regions(pdev);
2554 err_out_disable_device:
2555         pci_disable_device(pdev);
2556 err_out_free_netdev:
2557         pci_set_drvdata(pdev, NULL);
2558         free_netdev(netdev);
2559
2560         return err;
2561 }
2562
2563 static void __devexit enic_remove(struct pci_dev *pdev)
2564 {
2565         struct net_device *netdev = pci_get_drvdata(pdev);
2566
2567         if (netdev) {
2568                 struct enic *enic = netdev_priv(netdev);
2569
2570                 cancel_work_sync(&enic->reset);
2571                 cancel_work_sync(&enic->change_mtu_work);
2572                 unregister_netdev(netdev);
2573                 enic_dev_deinit(enic);
2574                 vnic_dev_close(enic->vdev);
2575 #ifdef CONFIG_PCI_IOV
2576                 if (enic_sriov_enabled(enic)) {
2577                         pci_disable_sriov(pdev);
2578                         enic->priv_flags &= ~ENIC_SRIOV_ENABLED;
2579                 }
2580 #endif
2581                 kfree(enic->pp);
2582                 vnic_dev_unregister(enic->vdev);
2583                 enic_iounmap(enic);
2584                 pci_release_regions(pdev);
2585                 pci_disable_device(pdev);
2586                 pci_set_drvdata(pdev, NULL);
2587                 free_netdev(netdev);
2588         }
2589 }
2590
2591 static struct pci_driver enic_driver = {
2592         .name = DRV_NAME,
2593         .id_table = enic_id_table,
2594         .probe = enic_probe,
2595         .remove = __devexit_p(enic_remove),
2596 };
2597
2598 static int __init enic_init_module(void)
2599 {
2600         pr_info("%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
2601
2602         return pci_register_driver(&enic_driver);
2603 }
2604
2605 static void __exit enic_cleanup_module(void)
2606 {
2607         pci_unregister_driver(&enic_driver);
2608 }
2609
2610 module_init(enic_init_module);
2611 module_exit(enic_cleanup_module);