drivers/net/enic/enic_main.c

   1 /*
   2  * Copyright 2008-2010 Cisco Systems, Inc.  All rights reserved.
   3  * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
   4  *
   5  * This program is free software; you may redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; version 2 of the License.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  10  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  11  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  12  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  13  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  14  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  15  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  16  * SOFTWARE.
  17  *
  18  */
  19
  20 #include <linux/module.h>
  21 #include <linux/kernel.h>
  22 #include <linux/string.h>
  23 #include <linux/errno.h>
  24 #include <linux/types.h>
  25 #include <linux/init.h>
  26 #include <linux/workqueue.h>
  27 #include <linux/pci.h>
  28 #include <linux/netdevice.h>
  29 #include <linux/etherdevice.h>
  30 #include <linux/if_ether.h>
  31 #include <linux/if_vlan.h>
  32 #include <linux/ethtool.h>
  33 #include <linux/in.h>
  34 #include <linux/ip.h>
  35 #include <linux/ipv6.h>
  36 #include <linux/tcp.h>
  37 #include <linux/rtnetlink.h>
  38 #include <net/ip6_checksum.h>
  39
  40 #include "cq_enet_desc.h"
  41 #include "vnic_dev.h"
  42 #include "vnic_intr.h"
  43 #include "vnic_stats.h"
  44 #include "vnic_vic.h"
  45 #include "enic_res.h"
  46 #include "enic.h"
  47
  48 #define ENIC_NOTIFY_TIMER_PERIOD        (2 * HZ)
  49 #define WQ_ENET_MAX_DESC_LEN            (1 << WQ_ENET_LEN_BITS)
  50 #define MAX_TSO                         (1 << 16)
  51 #define ENIC_DESC_MAX_SPLITS            (MAX_TSO / WQ_ENET_MAX_DESC_LEN + 1)
  52
  53 #define PCI_DEVICE_ID_CISCO_VIC_ENET         0x0043  /* ethernet vnic */
  54 #define PCI_DEVICE_ID_CISCO_VIC_ENET_DYN     0x0044  /* enet dynamic vnic */
  55
  56 /* Supported devices */
  57 static DEFINE_PCI_DEVICE_TABLE(enic_id_table) = {
  58         { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET) },
  59         { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_DYN) },
  60         { 0, }  /* end of table */
  61 };
  62
  63 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  64 MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>");
  65 MODULE_LICENSE("GPL");
  66 MODULE_VERSION(DRV_VERSION);
  67 MODULE_DEVICE_TABLE(pci, enic_id_table);
  68
  69 struct enic_stat {
  70         char name[ETH_GSTRING_LEN];
  71         unsigned int offset;
  72 };
  73
  74 #define ENIC_TX_STAT(stat)      \
  75         { .name = #stat, .offset = offsetof(struct vnic_tx_stats, stat) / 8 }
  76 #define ENIC_RX_STAT(stat)      \
  77         { .name = #stat, .offset = offsetof(struct vnic_rx_stats, stat) / 8 }
  78
  79 static const struct enic_stat enic_tx_stats[] = {
  80         ENIC_TX_STAT(tx_frames_ok),
  81         ENIC_TX_STAT(tx_unicast_frames_ok),
  82         ENIC_TX_STAT(tx_multicast_frames_ok),
  83         ENIC_TX_STAT(tx_broadcast_frames_ok),
  84         ENIC_TX_STAT(tx_bytes_ok),
  85         ENIC_TX_STAT(tx_unicast_bytes_ok),
  86         ENIC_TX_STAT(tx_multicast_bytes_ok),
  87         ENIC_TX_STAT(tx_broadcast_bytes_ok),
  88         ENIC_TX_STAT(tx_drops),
  89         ENIC_TX_STAT(tx_errors),
  90         ENIC_TX_STAT(tx_tso),
  91 };
  92
  93 static const struct enic_stat enic_rx_stats[] = {
  94         ENIC_RX_STAT(rx_frames_ok),
  95         ENIC_RX_STAT(rx_frames_total),
  96         ENIC_RX_STAT(rx_unicast_frames_ok),
  97         ENIC_RX_STAT(rx_multicast_frames_ok),
  98         ENIC_RX_STAT(rx_broadcast_frames_ok),
  99         ENIC_RX_STAT(rx_bytes_ok),
 100         ENIC_RX_STAT(rx_unicast_bytes_ok),
 101         ENIC_RX_STAT(rx_multicast_bytes_ok),
 102         ENIC_RX_STAT(rx_broadcast_bytes_ok),
 103         ENIC_RX_STAT(rx_drop),
 104         ENIC_RX_STAT(rx_no_bufs),
 105         ENIC_RX_STAT(rx_errors),
 106         ENIC_RX_STAT(rx_rss),
 107         ENIC_RX_STAT(rx_crc_errors),
 108         ENIC_RX_STAT(rx_frames_64),
 109         ENIC_RX_STAT(rx_frames_127),
 110         ENIC_RX_STAT(rx_frames_255),
 111         ENIC_RX_STAT(rx_frames_511),
 112         ENIC_RX_STAT(rx_frames_1023),
 113         ENIC_RX_STAT(rx_frames_1518),
 114         ENIC_RX_STAT(rx_frames_to_max),
 115 };
 116
 117 static const unsigned int enic_n_tx_stats = ARRAY_SIZE(enic_tx_stats);
 118 static const unsigned int enic_n_rx_stats = ARRAY_SIZE(enic_rx_stats);
 119
 120 static int enic_is_dynamic(struct enic *enic)
 121 {
 122         return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_DYN;
 123 }
 124
 125 static int enic_get_settings(struct net_device *netdev,
 126         struct ethtool_cmd *ecmd)
 127 {
 128         struct enic *enic = netdev_priv(netdev);
 129
 130         ecmd->supported = (SUPPORTED_10000baseT_Full | SUPPORTED_FIBRE);
 131         ecmd->advertising = (ADVERTISED_10000baseT_Full | ADVERTISED_FIBRE);
 132         ecmd->port = PORT_FIBRE;
 133         ecmd->transceiver = XCVR_EXTERNAL;
 134
 135         if (netif_carrier_ok(netdev)) {
 136                 ecmd->speed = vnic_dev_port_speed(enic->vdev);
 137                 ecmd->duplex = DUPLEX_FULL;
 138         } else {
 139                 ecmd->speed = -1;
 140                 ecmd->duplex = -1;
 141         }
 142
 143         ecmd->autoneg = AUTONEG_DISABLE;
 144
 145         return 0;
 146 }
 147
 148 static int enic_dev_fw_info(struct enic *enic,
 149         struct vnic_devcmd_fw_info **fw_info)
 150 {
 151         int err;
 152
 153         spin_lock(&enic->devcmd_lock);
 154         err = vnic_dev_fw_info(enic->vdev, fw_info);
 155         spin_unlock(&enic->devcmd_lock);
 156
 157         return err;
 158 }
 159
 160 static void enic_get_drvinfo(struct net_device *netdev,
 161         struct ethtool_drvinfo *drvinfo)
 162 {
 163         struct enic *enic = netdev_priv(netdev);
 164         struct vnic_devcmd_fw_info *fw_info;
 165
 166         enic_dev_fw_info(enic, &fw_info);
 167
 168         strncpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
 169         strncpy(drvinfo->version, DRV_VERSION, sizeof(drvinfo->version));
 170         strncpy(drvinfo->fw_version, fw_info->fw_version,
 171                 sizeof(drvinfo->fw_version));
 172         strncpy(drvinfo->bus_info, pci_name(enic->pdev),
 173                 sizeof(drvinfo->bus_info));
 174 }
 175
 176 static void enic_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
 177 {
 178         unsigned int i;
 179
 180         switch (stringset) {
 181         case ETH_SS_STATS:
 182                 for (i = 0; i < enic_n_tx_stats; i++) {
 183                         memcpy(data, enic_tx_stats[i].name, ETH_GSTRING_LEN);
 184                         data += ETH_GSTRING_LEN;
 185                 }
 186                 for (i = 0; i < enic_n_rx_stats; i++) {
 187                         memcpy(data, enic_rx_stats[i].name, ETH_GSTRING_LEN);
 188                         data += ETH_GSTRING_LEN;
 189                 }
 190                 break;
 191         }
 192 }
 193
 194 static int enic_get_sset_count(struct net_device *netdev, int sset)
 195 {
 196         switch (sset) {
 197         case ETH_SS_STATS:
 198                 return enic_n_tx_stats + enic_n_rx_stats;
 199         default:
 200                 return -EOPNOTSUPP;
 201         }
 202 }
 203
 204 static int enic_dev_stats_dump(struct enic *enic, struct vnic_stats **vstats)
 205 {
 206         int err;
 207
 208         spin_lock(&enic->devcmd_lock);
 209         err = vnic_dev_stats_dump(enic->vdev, vstats);
 210         spin_unlock(&enic->devcmd_lock);
 211
 212         return err;
 213 }
 214
 215 static void enic_get_ethtool_stats(struct net_device *netdev,
 216         struct ethtool_stats *stats, u64 *data)
 217 {
 218         struct enic *enic = netdev_priv(netdev);
 219         struct vnic_stats *vstats;
 220         unsigned int i;
 221
 222         enic_dev_stats_dump(enic, &vstats);
 223
 224         for (i = 0; i < enic_n_tx_stats; i++)
 225                 *(data++) = ((u64 *)&vstats->tx)[enic_tx_stats[i].offset];
 226         for (i = 0; i < enic_n_rx_stats; i++)
 227                 *(data++) = ((u64 *)&vstats->rx)[enic_rx_stats[i].offset];
 228 }
 229
 230 static u32 enic_get_rx_csum(struct net_device *netdev)
 231 {
 232         struct enic *enic = netdev_priv(netdev);
 233         return enic->csum_rx_enabled;
 234 }
 235
 236 static int enic_set_rx_csum(struct net_device *netdev, u32 data)
 237 {
 238         struct enic *enic = netdev_priv(netdev);
 239
 240         if (data && !ENIC_SETTING(enic, RXCSUM))
 241                 return -EINVAL;
 242
 243         enic->csum_rx_enabled = !!data;
 244
 245         return 0;
 246 }
 247
 248 static int enic_set_tx_csum(struct net_device *netdev, u32 data)
 249 {
 250         struct enic *enic = netdev_priv(netdev);
 251
 252         if (data && !ENIC_SETTING(enic, TXCSUM))
 253                 return -EINVAL;
 254
 255         if (data)
 256                 netdev->features |= NETIF_F_HW_CSUM;
 257         else
 258                 netdev->features &= ~NETIF_F_HW_CSUM;
 259
 260         return 0;
 261 }
 262
 263 static int enic_set_tso(struct net_device *netdev, u32 data)
 264 {
 265         struct enic *enic = netdev_priv(netdev);
 266
 267         if (data && !ENIC_SETTING(enic, TSO))
 268                 return -EINVAL;
 269
 270         if (data)
 271                 netdev->features |=
 272                         NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN;
 273         else
 274                 netdev->features &=
 275                         ~(NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN);
 276
 277         return 0;
 278 }
 279
 280 static u32 enic_get_msglevel(struct net_device *netdev)
 281 {
 282         struct enic *enic = netdev_priv(netdev);
 283         return enic->msg_enable;
 284 }
 285
 286 static void enic_set_msglevel(struct net_device *netdev, u32 value)
 287 {
 288         struct enic *enic = netdev_priv(netdev);
 289         enic->msg_enable = value;
 290 }
 291
 292 static int enic_get_coalesce(struct net_device *netdev,
 293         struct ethtool_coalesce *ecmd)
 294 {
 295         struct enic *enic = netdev_priv(netdev);
 296
 297         ecmd->tx_coalesce_usecs = enic->tx_coalesce_usecs;
 298         ecmd->rx_coalesce_usecs = enic->rx_coalesce_usecs;
 299
 300         return 0;
 301 }
 302
 303 static int enic_set_coalesce(struct net_device *netdev,
 304         struct ethtool_coalesce *ecmd)
 305 {
 306         struct enic *enic = netdev_priv(netdev);
 307         u32 tx_coalesce_usecs;
 308         u32 rx_coalesce_usecs;
 309
 310         tx_coalesce_usecs = min_t(u32,
 311                 INTR_COALESCE_HW_TO_USEC(VNIC_INTR_TIMER_MAX),
 312                 ecmd->tx_coalesce_usecs);
 313         rx_coalesce_usecs = min_t(u32,
 314                 INTR_COALESCE_HW_TO_USEC(VNIC_INTR_TIMER_MAX),
 315                 ecmd->rx_coalesce_usecs);
 316
 317         switch (vnic_dev_get_intr_mode(enic->vdev)) {
 318         case VNIC_DEV_INTR_MODE_INTX:
 319                 if (tx_coalesce_usecs != rx_coalesce_usecs)
 320                         return -EINVAL;
 321
 322                 vnic_intr_coalescing_timer_set(&enic->intr[ENIC_INTX_WQ_RQ],
 323                         INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs));
 324                 break;
 325         case VNIC_DEV_INTR_MODE_MSI:
 326                 if (tx_coalesce_usecs != rx_coalesce_usecs)
 327                         return -EINVAL;
 328
 329                 vnic_intr_coalescing_timer_set(&enic->intr[0],
 330                         INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs));
 331                 break;
 332         case VNIC_DEV_INTR_MODE_MSIX:
 333                 vnic_intr_coalescing_timer_set(&enic->intr[ENIC_MSIX_WQ],
 334                         INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs));
 335                 vnic_intr_coalescing_timer_set(&enic->intr[ENIC_MSIX_RQ],
 336                         INTR_COALESCE_USEC_TO_HW(rx_coalesce_usecs));
 337                 break;
 338         default:
 339                 break;
 340         }
 341
 342         enic->tx_coalesce_usecs = tx_coalesce_usecs;
 343         enic->rx_coalesce_usecs = rx_coalesce_usecs;
 344
 345         return 0;
 346 }
 347
 348 static const struct ethtool_ops enic_ethtool_ops = {
 349         .get_settings = enic_get_settings,
 350         .get_drvinfo = enic_get_drvinfo,
 351         .get_msglevel = enic_get_msglevel,
 352         .set_msglevel = enic_set_msglevel,
 353         .get_link = ethtool_op_get_link,
 354         .get_strings = enic_get_strings,
 355         .get_sset_count = enic_get_sset_count,
 356         .get_ethtool_stats = enic_get_ethtool_stats,
 357         .get_rx_csum = enic_get_rx_csum,
 358         .set_rx_csum = enic_set_rx_csum,
 359         .get_tx_csum = ethtool_op_get_tx_csum,
 360         .set_tx_csum = enic_set_tx_csum,
 361         .get_sg = ethtool_op_get_sg,
 362         .set_sg = ethtool_op_set_sg,
 363         .get_tso = ethtool_op_get_tso,
 364         .set_tso = enic_set_tso,
 365         .get_coalesce = enic_get_coalesce,
 366         .set_coalesce = enic_set_coalesce,
 367         .get_flags = ethtool_op_get_flags,
 368 };
 369
 370 static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
 371 {
 372         struct enic *enic = vnic_dev_priv(wq->vdev);
 373
 374         if (buf->sop)
 375                 pci_unmap_single(enic->pdev, buf->dma_addr,
 376                         buf->len, PCI_DMA_TODEVICE);
 377         else
 378                 pci_unmap_page(enic->pdev, buf->dma_addr,
 379                         buf->len, PCI_DMA_TODEVICE);
 380
 381         if (buf->os_buf)
 382                 dev_kfree_skb_any(buf->os_buf);
 383 }
 384
 385 static void enic_wq_free_buf(struct vnic_wq *wq,
 386         struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque)
 387 {
 388         enic_free_wq_buf(wq, buf);
 389 }
 390
 391 static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
 392         u8 type, u16 q_number, u16 completed_index, void *opaque)
 393 {
 394         struct enic *enic = vnic_dev_priv(vdev);
 395
 396         spin_lock(&enic->wq_lock[q_number]);
 397
 398         vnic_wq_service(&enic->wq[q_number], cq_desc,
 399                 completed_index, enic_wq_free_buf,
 400                 opaque);
 401
 402         if (netif_queue_stopped(enic->netdev) &&
 403             vnic_wq_desc_avail(&enic->wq[q_number]) >=
 404             (MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS))
 405                 netif_wake_queue(enic->netdev);
 406
 407         spin_unlock(&enic->wq_lock[q_number]);
 408
 409         return 0;
 410 }
 411
 412 static void enic_log_q_error(struct enic *enic)
 413 {
 414         unsigned int i;
 415         u32 error_status;
 416
 417         for (i = 0; i < enic->wq_count; i++) {
 418                 error_status = vnic_wq_error_status(&enic->wq[i]);
 419                 if (error_status)
 420                         netdev_err(enic->netdev, "WQ[%d] error_status %d\n",
 421                                 i, error_status);
 422         }
 423
 424         for (i = 0; i < enic->rq_count; i++) {
 425                 error_status = vnic_rq_error_status(&enic->rq[i]);
 426                 if (error_status)
 427                         netdev_err(enic->netdev, "RQ[%d] error_status %d\n",
 428                                 i, error_status);
 429         }
 430 }
 431
 432 static void enic_msglvl_check(struct enic *enic)
 433 {
 434         u32 msg_enable = vnic_dev_msg_lvl(enic->vdev);
 435
 436         if (msg_enable != enic->msg_enable) {
 437                 netdev_info(enic->netdev, "msg lvl changed from 0x%x to 0x%x\n",
 438                         enic->msg_enable, msg_enable);
 439                 enic->msg_enable = msg_enable;
 440         }
 441 }
 442
 443 static void enic_mtu_check(struct enic *enic)
 444 {
 445         u32 mtu = vnic_dev_mtu(enic->vdev);
 446         struct net_device *netdev = enic->netdev;
 447
 448         if (mtu && mtu != enic->port_mtu) {
 449                 enic->port_mtu = mtu;
 450                 if (mtu < netdev->mtu)
 451                         netdev_warn(netdev,
 452                                 "interface MTU (%d) set higher "
 453                                 "than switch port MTU (%d)\n",
 454                                 netdev->mtu, mtu);
 455         }
 456 }
 457
 458 static void enic_link_check(struct enic *enic)
 459 {
 460         int link_status = vnic_dev_link_status(enic->vdev);
 461         int carrier_ok = netif_carrier_ok(enic->netdev);
 462
 463         if (link_status && !carrier_ok) {
 464                 netdev_info(enic->netdev, "Link UP\n");
 465                 netif_carrier_on(enic->netdev);
 466         } else if (!link_status && carrier_ok) {
 467                 netdev_info(enic->netdev, "Link DOWN\n");
 468                 netif_carrier_off(enic->netdev);
 469         }
 470 }
 471
 472 static void enic_notify_check(struct enic *enic)
 473 {
 474         enic_msglvl_check(enic);
 475         enic_mtu_check(enic);
 476         enic_link_check(enic);
 477 }
 478
 479 #define ENIC_TEST_INTR(pba, i) (pba & (1 << i))
 480
 481 static irqreturn_t enic_isr_legacy(int irq, void *data)
 482 {
 483         struct net_device *netdev = data;
 484         struct enic *enic = netdev_priv(netdev);
 485         u32 pba;
 486
 487         vnic_intr_mask(&enic->intr[ENIC_INTX_WQ_RQ]);
 488
 489         pba = vnic_intr_legacy_pba(enic->legacy_pba);
 490         if (!pba) {
 491                 vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]);
 492                 return IRQ_NONE;        /* not our interrupt */
 493         }
 494
 495         if (ENIC_TEST_INTR(pba, ENIC_INTX_NOTIFY)) {
 496                 vnic_intr_return_all_credits(&enic->intr[ENIC_INTX_NOTIFY]);
 497                 enic_notify_check(enic);
 498         }
 499
 500         if (ENIC_TEST_INTR(pba, ENIC_INTX_ERR)) {
 501                 vnic_intr_return_all_credits(&enic->intr[ENIC_INTX_ERR]);
 502                 enic_log_q_error(enic);
 503                 /* schedule recovery from WQ/RQ error */
 504                 schedule_work(&enic->reset);
 505                 return IRQ_HANDLED;
 506         }
 507
 508         if (ENIC_TEST_INTR(pba, ENIC_INTX_WQ_RQ)) {
 509                 if (napi_schedule_prep(&enic->napi))
 510                         __napi_schedule(&enic->napi);
 511         } else {
 512                 vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]);
 513         }
 514
 515         return IRQ_HANDLED;
 516 }
 517
 518 static irqreturn_t enic_isr_msi(int irq, void *data)
 519 {
 520         struct enic *enic = data;
 521
 522         /* With MSI, there is no sharing of interrupts, so this is
 523          * our interrupt and there is no need to ack it.  The device
 524          * is not providing per-vector masking, so the OS will not
 525          * write to PCI config space to mask/unmask the interrupt.
 526          * We're using mask_on_assertion for MSI, so the device
 527          * automatically masks the interrupt when the interrupt is
 528          * generated.  Later, when exiting polling, the interrupt
 529          * will be unmasked (see enic_poll).
 530          *
 531          * Also, the device uses the same PCIe Traffic Class (TC)
 532          * for Memory Write data and MSI, so there are no ordering
 533          * issues; the MSI will always arrive at the Root Complex
 534          * _after_ corresponding Memory Writes (i.e. descriptor
 535          * writes).
 536          */
 537
 538         napi_schedule(&enic->napi);
 539
 540         return IRQ_HANDLED;
 541 }
 542
 543 static irqreturn_t enic_isr_msix_rq(int irq, void *data)
 544 {
 545         struct enic *enic = data;
 546
 547         /* schedule NAPI polling for RQ cleanup */
 548         napi_schedule(&enic->napi);
 549
 550         return IRQ_HANDLED;
 551 }
 552
 553 static irqreturn_t enic_isr_msix_wq(int irq, void *data)
 554 {
 555         struct enic *enic = data;
 556         unsigned int wq_work_to_do = -1; /* no limit */
 557         unsigned int wq_work_done;
 558
 559         wq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_WQ],
 560                 wq_work_to_do, enic_wq_service, NULL);
 561
 562         vnic_intr_return_credits(&enic->intr[ENIC_MSIX_WQ],
 563                 wq_work_done,
 564                 1 /* unmask intr */,
 565                 1 /* reset intr timer */);
 566
 567         return IRQ_HANDLED;
 568 }
 569
 570 static irqreturn_t enic_isr_msix_err(int irq, void *data)
 571 {
 572         struct enic *enic = data;
 573
 574         vnic_intr_return_all_credits(&enic->intr[ENIC_MSIX_ERR]);
 575
 576         enic_log_q_error(enic);
 577
 578         /* schedule recovery from WQ/RQ error */
 579         schedule_work(&enic->reset);
 580
 581         return IRQ_HANDLED;
 582 }
 583
 584 static irqreturn_t enic_isr_msix_notify(int irq, void *data)
 585 {
 586         struct enic *enic = data;
 587
 588         vnic_intr_return_all_credits(&enic->intr[ENIC_MSIX_NOTIFY]);
 589         enic_notify_check(enic);
 590
 591         return IRQ_HANDLED;
 592 }
 593
 594 static inline void enic_queue_wq_skb_cont(struct enic *enic,
 595         struct vnic_wq *wq, struct sk_buff *skb,
 596         unsigned int len_left, int loopback)
 597 {
 598         skb_frag_t *frag;
 599
 600         /* Queue additional data fragments */
 601         for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
 602                 len_left -= frag->size;
 603                 enic_queue_wq_desc_cont(wq, skb,
 604                         pci_map_page(enic->pdev, frag->page,
 605                                 frag->page_offset, frag->size,
 606                                 PCI_DMA_TODEVICE),
 607                         frag->size,
 608                         (len_left == 0),        /* EOP? */
 609                         loopback);
 610         }
 611 }
 612
 613 static inline void enic_queue_wq_skb_vlan(struct enic *enic,
 614         struct vnic_wq *wq, struct sk_buff *skb,
 615         int vlan_tag_insert, unsigned int vlan_tag, int loopback)
 616 {
 617         unsigned int head_len = skb_headlen(skb);
 618         unsigned int len_left = skb->len - head_len;
 619         int eop = (len_left == 0);
 620
 621         /* Queue the main skb fragment. The fragments are no larger
 622          * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
 623          * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
 624          * per fragment is queued.
 625          */
 626         enic_queue_wq_desc(wq, skb,
 627                 pci_map_single(enic->pdev, skb->data,
 628                         head_len, PCI_DMA_TODEVICE),
 629                 head_len,
 630                 vlan_tag_insert, vlan_tag,
 631                 eop, loopback);
 632
 633         if (!eop)
 634                 enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
 635 }
 636
 637 static inline void enic_queue_wq_skb_csum_l4(struct enic *enic,
 638         struct vnic_wq *wq, struct sk_buff *skb,
 639         int vlan_tag_insert, unsigned int vlan_tag, int loopback)
 640 {
 641         unsigned int head_len = skb_headlen(skb);
 642         unsigned int len_left = skb->len - head_len;
 643         unsigned int hdr_len = skb_transport_offset(skb);
 644         unsigned int csum_offset = hdr_len + skb->csum_offset;
 645         int eop = (len_left == 0);
 646
 647         /* Queue the main skb fragment. The fragments are no larger
 648          * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
 649          * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
 650          * per fragment is queued.
 651          */
 652         enic_queue_wq_desc_csum_l4(wq, skb,
 653                 pci_map_single(enic->pdev, skb->data,
 654                         head_len, PCI_DMA_TODEVICE),
 655                 head_len,
 656                 csum_offset,
 657                 hdr_len,
 658                 vlan_tag_insert, vlan_tag,
 659                 eop, loopback);
 660
 661         if (!eop)
 662                 enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
 663 }
 664
 665 static inline void enic_queue_wq_skb_tso(struct enic *enic,
 666         struct vnic_wq *wq, struct sk_buff *skb, unsigned int mss,
 667         int vlan_tag_insert, unsigned int vlan_tag, int loopback)
 668 {
 669         unsigned int frag_len_left = skb_headlen(skb);
 670         unsigned int len_left = skb->len - frag_len_left;
 671         unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
 672         int eop = (len_left == 0);
 673         unsigned int len;
 674         dma_addr_t dma_addr;
 675         unsigned int offset = 0;
 676         skb_frag_t *frag;
 677
 678         /* Preload TCP csum field with IP pseudo hdr calculated
 679          * with IP length set to zero.  HW will later add in length
 680          * to each TCP segment resulting from the TSO.
 681          */
 682
 683         if (skb->protocol == cpu_to_be16(ETH_P_IP)) {
 684                 ip_hdr(skb)->check = 0;
 685                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr,
 686                         ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
 687         } else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) {
 688                 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
 689                         &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
 690         }
 691
 692         /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
 693          * for the main skb fragment
 694          */
 695         while (frag_len_left) {
 696                 len = min(frag_len_left, (unsigned int)WQ_ENET_MAX_DESC_LEN);
 697                 dma_addr = pci_map_single(enic->pdev, skb->data + offset,
 698                                 len, PCI_DMA_TODEVICE);
 699                 enic_queue_wq_desc_tso(wq, skb,
 700                         dma_addr,
 701                         len,
 702                         mss, hdr_len,
 703                         vlan_tag_insert, vlan_tag,
 704                         eop && (len == frag_len_left), loopback);
 705                 frag_len_left -= len;
 706                 offset += len;
 707         }
 708
 709         if (eop)
 710                 return;
 711
 712         /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
 713          * for additional data fragments
 714          */
 715         for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
 716                 len_left -= frag->size;
 717                 frag_len_left = frag->size;
 718                 offset = frag->page_offset;
 719
 720                 while (frag_len_left) {
 721                         len = min(frag_len_left,
 722                                 (unsigned int)WQ_ENET_MAX_DESC_LEN);
 723                         dma_addr = pci_map_page(enic->pdev, frag->page,
 724                                 offset, len,
 725                                 PCI_DMA_TODEVICE);
 726                         enic_queue_wq_desc_cont(wq, skb,
 727                                 dma_addr,
 728                                 len,
 729                                 (len_left == 0) &&
 730                                 (len == frag_len_left),         /* EOP? */
 731                                 loopback);
 732                         frag_len_left -= len;
 733                         offset += len;
 734                 }
 735         }
 736 }
 737
 738 static inline void enic_queue_wq_skb(struct enic *enic,
 739         struct vnic_wq *wq, struct sk_buff *skb)
 740 {
 741         unsigned int mss = skb_shinfo(skb)->gso_size;
 742         unsigned int vlan_tag = 0;
 743         int vlan_tag_insert = 0;
 744         int loopback = 0;
 745
 746         if (enic->vlan_group && vlan_tx_tag_present(skb)) {
 747                 /* VLAN tag from trunking driver */
 748                 vlan_tag_insert = 1;
 749                 vlan_tag = vlan_tx_tag_get(skb);
 750         } else if (enic->loop_enable) {
 751                 vlan_tag = enic->loop_tag;
 752                 loopback = 1;
 753         }
 754
 755         if (mss)
 756                 enic_queue_wq_skb_tso(enic, wq, skb, mss,
 757                         vlan_tag_insert, vlan_tag, loopback);
 758         else if (skb->ip_summed == CHECKSUM_PARTIAL)
 759                 enic_queue_wq_skb_csum_l4(enic, wq, skb,
 760                         vlan_tag_insert, vlan_tag, loopback);
 761         else
 762                 enic_queue_wq_skb_vlan(enic, wq, skb,
 763                         vlan_tag_insert, vlan_tag, loopback);
 764 }
 765
 766 /* netif_tx_lock held, process context with BHs disabled, or BH */
 767 static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb,
 768         struct net_device *netdev)
 769 {
 770         struct enic *enic = netdev_priv(netdev);
 771         struct vnic_wq *wq = &enic->wq[0];
 772         unsigned long flags;
 773
 774         if (skb->len <= 0) {
 775                 dev_kfree_skb(skb);
 776                 return NETDEV_TX_OK;
 777         }
 778
 779         /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs,
 780          * which is very likely.  In the off chance it's going to take
 781          * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb.
 782          */
 783
 784         if (skb_shinfo(skb)->gso_size == 0 &&
 785             skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC &&
 786             skb_linearize(skb)) {
 787                 dev_kfree_skb(skb);
 788                 return NETDEV_TX_OK;
 789         }
 790
 791         spin_lock_irqsave(&enic->wq_lock[0], flags);
 792
 793         if (vnic_wq_desc_avail(wq) <
 794             skb_shinfo(skb)->nr_frags + ENIC_DESC_MAX_SPLITS) {
 795                 netif_stop_queue(netdev);
 796                 /* This is a hard error, log it */
 797                 netdev_err(netdev, "BUG! Tx ring full when queue awake!\n");
 798                 spin_unlock_irqrestore(&enic->wq_lock[0], flags);
 799                 return NETDEV_TX_BUSY;
 800         }
 801
 802         enic_queue_wq_skb(enic, wq, skb);
 803
 804         if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS)
 805                 netif_stop_queue(netdev);
 806
 807         spin_unlock_irqrestore(&enic->wq_lock[0], flags);
 808
 809         return NETDEV_TX_OK;
 810 }
 811
 812 /* dev_base_lock rwlock held, nominally process context */
 813 static struct net_device_stats *enic_get_stats(struct net_device *netdev)
 814 {
 815         struct enic *enic = netdev_priv(netdev);
 816         struct net_device_stats *net_stats = &netdev->stats;
 817         struct vnic_stats *stats;
 818
 819         enic_dev_stats_dump(enic, &stats);
 820
 821         net_stats->tx_packets = stats->tx.tx_frames_ok;
 822         net_stats->tx_bytes = stats->tx.tx_bytes_ok;
 823         net_stats->tx_errors = stats->tx.tx_errors;
 824         net_stats->tx_dropped = stats->tx.tx_drops;
 825
 826         net_stats->rx_packets = stats->rx.rx_frames_ok;
 827         net_stats->rx_bytes = stats->rx.rx_bytes_ok;
 828         net_stats->rx_errors = stats->rx.rx_errors;
 829         net_stats->multicast = stats->rx.rx_multicast_frames_ok;
 830         net_stats->rx_over_errors = enic->rq_truncated_pkts;
 831         net_stats->rx_crc_errors = enic->rq_bad_fcs;
 832         net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop;
 833
 834         return net_stats;
 835 }
 836
 837 static void enic_reset_multicast_list(struct enic *enic)
 838 {
 839         enic->mc_count = 0;
 840         enic->flags = 0;
 841 }
 842
 843 static int enic_set_mac_addr(struct net_device *netdev, char *addr)
 844 {
 845         struct enic *enic = netdev_priv(netdev);
 846
 847         if (enic_is_dynamic(enic)) {
 848                 if (!is_valid_ether_addr(addr) && !is_zero_ether_addr(addr))
 849                         return -EADDRNOTAVAIL;
 850         } else {
 851                 if (!is_valid_ether_addr(addr))
 852                         return -EADDRNOTAVAIL;
 853         }
 854
 855         memcpy(netdev->dev_addr, addr, netdev->addr_len);
 856
 857         return 0;
 858 }
 859
 860 static int enic_dev_add_station_addr(struct enic *enic)
 861 {
 862         int err = 0;
 863
 864         if (is_valid_ether_addr(enic->netdev->dev_addr)) {
 865                 spin_lock(&enic->devcmd_lock);
 866                 err = vnic_dev_add_addr(enic->vdev, enic->netdev->dev_addr);
 867                 spin_unlock(&enic->devcmd_lock);
 868         }
 869
 870         return err;
 871 }
 872
 873 static int enic_dev_del_station_addr(struct enic *enic)
 874 {
 875         int err = 0;
 876
 877         if (is_valid_ether_addr(enic->netdev->dev_addr)) {
 878                 spin_lock(&enic->devcmd_lock);
 879                 err = vnic_dev_del_addr(enic->vdev, enic->netdev->dev_addr);
 880                 spin_unlock(&enic->devcmd_lock);
 881         }
 882
 883         return err;
 884 }
 885
 886 static int enic_set_mac_address_dynamic(struct net_device *netdev, void *p)
 887 {
 888         struct enic *enic = netdev_priv(netdev);
 889         struct sockaddr *saddr = p;
 890         char *addr = saddr->sa_data;
 891         int err;
 892
 893         if (netif_running(enic->netdev)) {
 894                 err = enic_dev_del_station_addr(enic);
 895                 if (err)
 896                         return err;
 897         }
 898
 899         err = enic_set_mac_addr(netdev, addr);
 900         if (err)
 901                 return err;
 902
 903         if (netif_running(enic->netdev)) {
 904                 err = enic_dev_add_station_addr(enic);
 905                 if (err)
 906                         return err;
 907         }
 908
 909         return err;
 910 }
 911
 912 static int enic_set_mac_address(struct net_device *netdev, void *p)
 913 {
 914         return -EOPNOTSUPP;
 915 }
 916
 917 static int enic_dev_packet_filter(struct enic *enic, int directed,
 918         int multicast, int broadcast, int promisc, int allmulti)
 919 {
 920         int err;
 921
 922         spin_lock(&enic->devcmd_lock);
 923         err = vnic_dev_packet_filter(enic->vdev, directed,
 924                 multicast, broadcast, promisc, allmulti);
 925         spin_unlock(&enic->devcmd_lock);
 926
 927         return err;
 928 }
 929
 930 static int enic_dev_add_multicast_addr(struct enic *enic, u8 *addr)
 931 {
 932         int err;
 933
 934         spin_lock(&enic->devcmd_lock);
 935         err = vnic_dev_add_addr(enic->vdev, addr);
 936         spin_unlock(&enic->devcmd_lock);
 937
 938         return err;
 939 }
 940
 941 static int enic_dev_del_multicast_addr(struct enic *enic, u8 *addr)
 942 {
 943         int err;
 944
 945         spin_lock(&enic->devcmd_lock);
 946         err = vnic_dev_del_addr(enic->vdev, addr);
 947         spin_unlock(&enic->devcmd_lock);
 948
 949         return err;
 950 }
 951
 952 /* netif_tx_lock held, BHs disabled */
 953 static void enic_set_multicast_list(struct net_device *netdev)
 954 {
 955         struct enic *enic = netdev_priv(netdev);
 956         struct netdev_hw_addr *ha;
 957         int directed = 1;
 958         int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0;
 959         int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0;
 960         int promisc = (netdev->flags & IFF_PROMISC) ? 1 : 0;
 961         unsigned int mc_count = netdev_mc_count(netdev);
 962         int allmulti = (netdev->flags & IFF_ALLMULTI) ||
 963                 mc_count > ENIC_MULTICAST_PERFECT_FILTERS;
 964         unsigned int flags = netdev->flags | (allmulti ? IFF_ALLMULTI : 0);
 965         u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN];
 966         unsigned int i, j;
 967
 968         if (mc_count > ENIC_MULTICAST_PERFECT_FILTERS)
 969                 mc_count = ENIC_MULTICAST_PERFECT_FILTERS;
 970
 971         if (enic->flags != flags) {
 972                 enic->flags = flags;
 973                 enic_dev_packet_filter(enic, directed,
 974                         multicast, broadcast, promisc, allmulti);
 975         }
 976
 977         /* Is there an easier way?  Trying to minimize to
 978          * calls to add/del multicast addrs.  We keep the
 979          * addrs from the last call in enic->mc_addr and
 980          * look for changes to add/del.
 981          */
 982
 983         i = 0;
 984         netdev_for_each_mc_addr(ha, netdev) {
 985                 if (i == mc_count)
 986                         break;
 987                 memcpy(mc_addr[i++], ha->addr, ETH_ALEN);
 988         }
 989
 990         for (i = 0; i < enic->mc_count; i++) {
 991                 for (j = 0; j < mc_count; j++)
 992                         if (compare_ether_addr(enic->mc_addr[i],
 993                                 mc_addr[j]) == 0)
 994                                 break;
 995                 if (j == mc_count)
 996                         enic_dev_del_multicast_addr(enic, enic->mc_addr[i]);
 997         }
 998
 999         for (i = 0; i < mc_count; i++) {
1000                 for (j = 0; j < enic->mc_count; j++)
1001                         if (compare_ether_addr(mc_addr[i],
1002                                 enic->mc_addr[j]) == 0)
1003                                 break;
1004                 if (j == enic->mc_count)
1005                         enic_dev_add_multicast_addr(enic, mc_addr[i]);
1006         }
1007
1008         /* Save the list to compare against next time
1009          */
1010
1011         for (i = 0; i < mc_count; i++)
1012                 memcpy(enic->mc_addr[i], mc_addr[i], ETH_ALEN);
1013
1014         enic->mc_count = mc_count;
1015 }
1016
1017 /* rtnl lock is held */
1018 static void enic_vlan_rx_register(struct net_device *netdev,
1019         struct vlan_group *vlan_group)
1020 {
1021         struct enic *enic = netdev_priv(netdev);
1022         enic->vlan_group = vlan_group;
1023 }
1024
1025 /* rtnl lock is held */
1026 static void enic_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
1027 {
1028         struct enic *enic = netdev_priv(netdev);
1029
1030         spin_lock(&enic->devcmd_lock);
1031         enic_add_vlan(enic, vid);
1032         spin_unlock(&enic->devcmd_lock);
1033 }
1034
1035 /* rtnl lock is held */
1036 static void enic_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
1037 {
1038         struct enic *enic = netdev_priv(netdev);
1039
1040         spin_lock(&enic->devcmd_lock);
1041         enic_del_vlan(enic, vid);
1042         spin_unlock(&enic->devcmd_lock);
1043 }
1044
1045 /* netif_tx_lock held, BHs disabled */
1046 static void enic_tx_timeout(struct net_device *netdev)
1047 {
1048         struct enic *enic = netdev_priv(netdev);
1049         schedule_work(&enic->reset);
1050 }
1051
1052 static int enic_vnic_dev_deinit(struct enic *enic)
1053 {
1054         int err;
1055
1056         spin_lock(&enic->devcmd_lock);
1057         err = vnic_dev_deinit(enic->vdev);
1058         spin_unlock(&enic->devcmd_lock);
1059
1060         return err;
1061 }
1062
1063 static int enic_dev_init_prov(struct enic *enic, struct vic_provinfo *vp)
1064 {
1065         int err;
1066
1067         spin_lock(&enic->devcmd_lock);
1068         err = vnic_dev_init_prov(enic->vdev,
1069                 (u8 *)vp, vic_provinfo_size(vp));
1070         spin_unlock(&enic->devcmd_lock);
1071
1072         return err;
1073 }
1074
1075 static int enic_dev_init_done(struct enic *enic, int *done, int *error)
1076 {
1077         int err;
1078
1079         spin_lock(&enic->devcmd_lock);
1080         err = vnic_dev_init_done(enic->vdev, done, error);
1081         spin_unlock(&enic->devcmd_lock);
1082
1083         return err;
1084 }
1085
1086 static int enic_set_port_profile(struct enic *enic, u8 *mac)
1087 {
1088         struct vic_provinfo *vp;
1089         u8 oui[3] = VIC_PROVINFO_CISCO_OUI;
1090         u8 *uuid;
1091         char uuid_str[38];
1092         static char *uuid_fmt = "%02X%02X%02X%02X-%02X%02X-%02X%02X-"
1093                 "%02X%02X-%02X%02X%02X%02X%0X%02X";
1094         int err;
1095
1096         err = enic_vnic_dev_deinit(enic);
1097         if (err)
1098                 return err;
1099
1100         switch (enic->pp.request) {
1101
1102         case PORT_REQUEST_ASSOCIATE:
1103
1104                 if (!(enic->pp.set & ENIC_SET_NAME) || !strlen(enic->pp.name))
1105                         return -EINVAL;
1106
1107                 if (!is_valid_ether_addr(mac))
1108                         return -EADDRNOTAVAIL;
1109
1110                 vp = vic_provinfo_alloc(GFP_KERNEL, oui,
1111                         VIC_PROVINFO_LINUX_TYPE);
1112                 if (!vp)
1113                         return -ENOMEM;
1114
1115                 vic_provinfo_add_tlv(vp,
1116                         VIC_LINUX_PROV_TLV_PORT_PROFILE_NAME_STR,
1117                         strlen(enic->pp.name) + 1, enic->pp.name);
1118
1119                 vic_provinfo_add_tlv(vp,
1120                         VIC_LINUX_PROV_TLV_CLIENT_MAC_ADDR,
1121                         ETH_ALEN, mac);
1122
1123                 if (enic->pp.set & ENIC_SET_INSTANCE) {
1124                         uuid = enic->pp.instance_uuid;
1125                         sprintf(uuid_str, uuid_fmt,
1126                                 uuid[0],  uuid[1],  uuid[2],  uuid[3],
1127                                 uuid[4],  uuid[5],  uuid[6],  uuid[7],
1128                                 uuid[8],  uuid[9],  uuid[10], uuid[11],
1129                                 uuid[12], uuid[13], uuid[14], uuid[15]);
1130                         vic_provinfo_add_tlv(vp,
1131                                 VIC_LINUX_PROV_TLV_CLIENT_UUID_STR,
1132                                 sizeof(uuid_str), uuid_str);
1133                 }
1134
1135                 if (enic->pp.set & ENIC_SET_HOST) {
1136                         uuid = enic->pp.host_uuid;
1137                         sprintf(uuid_str, uuid_fmt,
1138                                 uuid[0],  uuid[1],  uuid[2],  uuid[3],
1139                                 uuid[4],  uuid[5],  uuid[6],  uuid[7],
1140                                 uuid[8],  uuid[9],  uuid[10], uuid[11],
1141                                 uuid[12], uuid[13], uuid[14], uuid[15]);
1142                         vic_provinfo_add_tlv(vp,
1143                                 VIC_LINUX_PROV_TLV_HOST_UUID_STR,
1144                                 sizeof(uuid_str), uuid_str);
1145                 }
1146
1147                 err = enic_dev_init_prov(enic, vp);
1148                 vic_provinfo_free(vp);
1149                 if (err)
1150                         return err;
1151                 break;
1152
1153         case PORT_REQUEST_DISASSOCIATE:
1154                 break;
1155
1156         default:
1157                 return -EINVAL;
1158         }
1159
1160         enic->pp.set |= ENIC_SET_APPLIED;
1161         return 0;
1162 }
1163
1164 static int enic_set_vf_port(struct net_device *netdev, int vf,
1165         struct nlattr *port[])
1166 {
1167         struct enic *enic = netdev_priv(netdev);
1168
1169         memset(&enic->pp, 0, sizeof(enic->pp));
1170
1171         if (port[IFLA_PORT_REQUEST]) {
1172                 enic->pp.set |= ENIC_SET_REQUEST;
1173                 enic->pp.request = nla_get_u8(port[IFLA_PORT_REQUEST]);
1174         }
1175
1176         if (port[IFLA_PORT_PROFILE]) {
1177                 enic->pp.set |= ENIC_SET_NAME;
1178                 memcpy(enic->pp.name, nla_data(port[IFLA_PORT_PROFILE]),
1179                         PORT_PROFILE_MAX);
1180         }
1181
1182         if (port[IFLA_PORT_INSTANCE_UUID]) {
1183                 enic->pp.set |= ENIC_SET_INSTANCE;
1184                 memcpy(enic->pp.instance_uuid,
1185                         nla_data(port[IFLA_PORT_INSTANCE_UUID]), PORT_UUID_MAX);
1186         }
1187
1188         if (port[IFLA_PORT_HOST_UUID]) {
1189                 enic->pp.set |= ENIC_SET_HOST;
1190                 memcpy(enic->pp.host_uuid,
1191                         nla_data(port[IFLA_PORT_HOST_UUID]), PORT_UUID_MAX);
1192         }
1193
1194         /* don't support VFs, yet */
1195         if (vf != PORT_SELF_VF)
1196                 return -EOPNOTSUPP;
1197
1198         if (!(enic->pp.set & ENIC_SET_REQUEST))
1199                 return -EOPNOTSUPP;
1200
1201         if (enic->pp.request == PORT_REQUEST_ASSOCIATE) {
1202
1203                 /* If the interface mac addr hasn't been assigned,
1204                  * assign a random mac addr before setting port-
1205                  * profile.
1206                  */
1207
1208                 if (is_zero_ether_addr(netdev->dev_addr))
1209                         random_ether_addr(netdev->dev_addr);
1210         }
1211
1212         return enic_set_port_profile(enic, netdev->dev_addr);
1213 }
1214
1215 static int enic_get_vf_port(struct net_device *netdev, int vf,
1216         struct sk_buff *skb)
1217 {
1218         struct enic *enic = netdev_priv(netdev);
1219         int err, error, done;
1220         u16 response = PORT_PROFILE_RESPONSE_SUCCESS;
1221
1222         if (!(enic->pp.set & ENIC_SET_APPLIED))
1223                 return -ENODATA;
1224
1225         err = enic_dev_init_done(enic, &done, &error);
1226         if (err)
1227                 error = err;
1228
1229         switch (error) {
1230         case ERR_SUCCESS:
1231                 if (!done)
1232                         response = PORT_PROFILE_RESPONSE_INPROGRESS;
1233                 break;
1234         case ERR_EINVAL:
1235                 response = PORT_PROFILE_RESPONSE_INVALID;
1236                 break;
1237         case ERR_EBADSTATE:
1238                 response = PORT_PROFILE_RESPONSE_BADSTATE;
1239                 break;
1240         case ERR_ENOMEM:
1241                 response = PORT_PROFILE_RESPONSE_INSUFFICIENT_RESOURCES;
1242                 break;
1243         default:
1244                 response = PORT_PROFILE_RESPONSE_ERROR;
1245                 break;
1246         }
1247
1248         NLA_PUT_U16(skb, IFLA_PORT_REQUEST, enic->pp.request);
1249         NLA_PUT_U16(skb, IFLA_PORT_RESPONSE, response);
1250         if (enic->pp.set & ENIC_SET_NAME)
1251                 NLA_PUT(skb, IFLA_PORT_PROFILE, PORT_PROFILE_MAX,
1252                         enic->pp.name);
1253         if (enic->pp.set & ENIC_SET_INSTANCE)
1254                 NLA_PUT(skb, IFLA_PORT_INSTANCE_UUID, PORT_UUID_MAX,
1255                         enic->pp.instance_uuid);
1256         if (enic->pp.set & ENIC_SET_HOST)
1257                 NLA_PUT(skb, IFLA_PORT_HOST_UUID, PORT_UUID_MAX,
1258                         enic->pp.host_uuid);
1259
1260         return 0;
1261
1262 nla_put_failure:
1263         return -EMSGSIZE;
1264 }
1265
1266 static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
1267 {
1268         struct enic *enic = vnic_dev_priv(rq->vdev);
1269
1270         if (!buf->os_buf)
1271                 return;
1272
1273         pci_unmap_single(enic->pdev, buf->dma_addr,
1274                 buf->len, PCI_DMA_FROMDEVICE);
1275         dev_kfree_skb_any(buf->os_buf);
1276 }
1277
1278 static int enic_rq_alloc_buf(struct vnic_rq *rq)
1279 {
1280         struct enic *enic = vnic_dev_priv(rq->vdev);
1281         struct net_device *netdev = enic->netdev;
1282         struct sk_buff *skb;
1283         unsigned int len = netdev->mtu + VLAN_ETH_HLEN;
1284         unsigned int os_buf_index = 0;
1285         dma_addr_t dma_addr;
1286
1287         skb = netdev_alloc_skb_ip_align(netdev, len);
1288         if (!skb)
1289                 return -ENOMEM;
1290
1291         dma_addr = pci_map_single(enic->pdev, skb->data,
1292                 len, PCI_DMA_FROMDEVICE);
1293
1294         enic_queue_rq_desc(rq, skb, os_buf_index,
1295                 dma_addr, len);
1296
1297         return 0;
1298 }
1299
1300 static int enic_rq_alloc_buf_a1(struct vnic_rq *rq)
1301 {
1302         struct rq_enet_desc *desc = vnic_rq_next_desc(rq);
1303
1304         if (vnic_rq_posting_soon(rq)) {
1305
1306                 /* SW workaround for A0 HW erratum: if we're just about
1307                  * to write posted_index, insert a dummy desc
1308                  * of type resvd
1309                  */
1310
1311                 rq_enet_desc_enc(desc, 0, RQ_ENET_TYPE_RESV2, 0);
1312                 vnic_rq_post(rq, 0, 0, 0, 0);
1313         } else {
1314                 return enic_rq_alloc_buf(rq);
1315         }
1316
1317         return 0;
1318 }
1319
1320 static int enic_dev_hw_version(struct enic *enic,
1321         enum vnic_dev_hw_version *hw_ver)
1322 {
1323         int err;
1324
1325         spin_lock(&enic->devcmd_lock);
1326         err = vnic_dev_hw_version(enic->vdev, hw_ver);
1327         spin_unlock(&enic->devcmd_lock);
1328
1329         return err;
1330 }
1331
1332 static int enic_set_rq_alloc_buf(struct enic *enic)
1333 {
1334         enum vnic_dev_hw_version hw_ver;
1335         int err;
1336
1337         err = enic_dev_hw_version(enic, &hw_ver);
1338         if (err)
1339                 return err;
1340
1341         switch (hw_ver) {
1342         case VNIC_DEV_HW_VER_A1:
1343                 enic->rq_alloc_buf = enic_rq_alloc_buf_a1;
1344                 break;
1345         case VNIC_DEV_HW_VER_A2:
1346         case VNIC_DEV_HW_VER_UNKNOWN:
1347                 enic->rq_alloc_buf = enic_rq_alloc_buf;
1348                 break;
1349         default:
1350                 return -ENODEV;
1351         }
1352
1353         return 0;
1354 }
1355
1356 static void enic_rq_indicate_buf(struct vnic_rq *rq,
1357         struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
1358         int skipped, void *opaque)
1359 {
1360         struct enic *enic = vnic_dev_priv(rq->vdev);
1361         struct net_device *netdev = enic->netdev;
1362         struct sk_buff *skb;
1363
1364         u8 type, color, eop, sop, ingress_port, vlan_stripped;
1365         u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
1366         u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
1367         u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
1368         u8 packet_error;
1369         u16 q_number, completed_index, bytes_written, vlan_tci, checksum;
1370         u32 rss_hash;
1371
1372         if (skipped)
1373                 return;
1374
1375         skb = buf->os_buf;
1376         prefetch(skb->data - NET_IP_ALIGN);
1377         pci_unmap_single(enic->pdev, buf->dma_addr,
1378                 buf->len, PCI_DMA_FROMDEVICE);
1379
1380         cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
1381                 &type, &color, &q_number, &completed_index,
1382                 &ingress_port, &fcoe, &eop, &sop, &rss_type,
1383                 &csum_not_calc, &rss_hash, &bytes_written,
1384                 &packet_error, &vlan_stripped, &vlan_tci, &checksum,
1385                 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
1386                 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
1387                 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
1388                 &fcs_ok);
1389
1390         if (packet_error) {
1391
1392                 if (!fcs_ok) {
1393                         if (bytes_written > 0)
1394                                 enic->rq_bad_fcs++;
1395                         else if (bytes_written == 0)
1396                                 enic->rq_truncated_pkts++;
1397                 }
1398
1399                 dev_kfree_skb_any(skb);
1400
1401                 return;
1402         }
1403
1404         if (eop && bytes_written > 0) {
1405
1406                 /* Good receive
1407                  */
1408
1409                 skb_put(skb, bytes_written);
1410                 skb->protocol = eth_type_trans(skb, netdev);
1411
1412                 if (enic->csum_rx_enabled && !csum_not_calc) {
1413                         skb->csum = htons(checksum);
1414                         skb->ip_summed = CHECKSUM_COMPLETE;
1415                 }
1416
1417                 skb->dev = netdev;
1418
1419                 if (enic->vlan_group && vlan_stripped &&
1420                         (vlan_tci & CQ_ENET_RQ_DESC_VLAN_TCI_VLAN_MASK)) {
1421
1422                         if (netdev->features & NETIF_F_GRO)
1423                                 vlan_gro_receive(&enic->napi, enic->vlan_group,
1424                                         vlan_tci, skb);
1425                         else
1426                                 vlan_hwaccel_receive_skb(skb,
1427                                         enic->vlan_group, vlan_tci);
1428
1429                 } else {
1430
1431                         if (netdev->features & NETIF_F_GRO)
1432                                 napi_gro_receive(&enic->napi, skb);
1433                         else
1434                                 netif_receive_skb(skb);
1435
1436                 }
1437
1438         } else {
1439
1440                 /* Buffer overflow
1441                  */
1442
1443                 dev_kfree_skb_any(skb);
1444         }
1445 }
1446
1447 static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
1448         u8 type, u16 q_number, u16 completed_index, void *opaque)
1449 {
1450         struct enic *enic = vnic_dev_priv(vdev);
1451
1452         vnic_rq_service(&enic->rq[q_number], cq_desc,
1453                 completed_index, VNIC_RQ_RETURN_DESC,
1454                 enic_rq_indicate_buf, opaque);
1455
1456         return 0;
1457 }
1458
1459 static int enic_poll(struct napi_struct *napi, int budget)
1460 {
1461         struct enic *enic = container_of(napi, struct enic, napi);
1462         unsigned int rq_work_to_do = budget;
1463         unsigned int wq_work_to_do = -1; /* no limit */
1464         unsigned int  work_done, rq_work_done, wq_work_done;
1465         int err;
1466
1467         /* Service RQ (first) and WQ
1468          */
1469
1470         rq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_RQ],
1471                 rq_work_to_do, enic_rq_service, NULL);
1472
1473         wq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_WQ],
1474                 wq_work_to_do, enic_wq_service, NULL);
1475
1476         /* Accumulate intr event credits for this polling
1477          * cycle.  An intr event is the completion of a
1478          * a WQ or RQ packet.
1479          */
1480
1481         work_done = rq_work_done + wq_work_done;
1482
1483         if (work_done > 0)
1484                 vnic_intr_return_credits(&enic->intr[ENIC_INTX_WQ_RQ],
1485                         work_done,
1486                         0 /* don't unmask intr */,
1487                         0 /* don't reset intr timer */);
1488
1489         err = vnic_rq_fill(&enic->rq[0], enic->rq_alloc_buf);
1490
1491         /* Buffer allocation failed. Stay in polling
1492          * mode so we can try to fill the ring again.
1493          */
1494
1495         if (err)
1496                 rq_work_done = rq_work_to_do;
1497
1498         if (rq_work_done < rq_work_to_do) {
1499
1500                 /* Some work done, but not enough to stay in polling,
1501                  * exit polling
1502                  */
1503
1504                 napi_complete(napi);
1505                 vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]);
1506         }
1507
1508         return rq_work_done;
1509 }
1510
1511 static int enic_poll_msix(struct napi_struct *napi, int budget)
1512 {
1513         struct enic *enic = container_of(napi, struct enic, napi);
1514         unsigned int work_to_do = budget;
1515         unsigned int work_done;
1516         int err;
1517
1518         /* Service RQ
1519          */
1520
1521         work_done = vnic_cq_service(&enic->cq[ENIC_CQ_RQ],
1522                 work_to_do, enic_rq_service, NULL);
1523
1524         /* Return intr event credits for this polling
1525          * cycle.  An intr event is the completion of a
1526          * RQ packet.
1527          */
1528
1529         if (work_done > 0)
1530                 vnic_intr_return_credits(&enic->intr[ENIC_MSIX_RQ],
1531                         work_done,
1532                         0 /* don't unmask intr */,
1533                         0 /* don't reset intr timer */);
1534
1535         err = vnic_rq_fill(&enic->rq[0], enic->rq_alloc_buf);
1536
1537         /* Buffer allocation failed. Stay in polling mode
1538          * so we can try to fill the ring again.
1539          */
1540
1541         if (err)
1542                 work_done = work_to_do;
1543
1544         if (work_done < work_to_do) {
1545
1546                 /* Some work done, but not enough to stay in polling,
1547                  * exit polling
1548                  */
1549
1550                 napi_complete(napi);
1551                 vnic_intr_unmask(&enic->intr[ENIC_MSIX_RQ]);
1552         }
1553
1554         return work_done;
1555 }
1556
1557 static void enic_notify_timer(unsigned long data)
1558 {
1559         struct enic *enic = (struct enic *)data;
1560
1561         enic_notify_check(enic);
1562
1563         mod_timer(&enic->notify_timer,
1564                 round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD));
1565 }
1566
1567 static void enic_free_intr(struct enic *enic)
1568 {
1569         struct net_device *netdev = enic->netdev;
1570         unsigned int i;
1571
1572         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1573         case VNIC_DEV_INTR_MODE_INTX:
1574                 free_irq(enic->pdev->irq, netdev);
1575                 break;
1576         case VNIC_DEV_INTR_MODE_MSI:
1577                 free_irq(enic->pdev->irq, enic);
1578                 break;
1579         case VNIC_DEV_INTR_MODE_MSIX:
1580                 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1581                         if (enic->msix[i].requested)
1582                                 free_irq(enic->msix_entry[i].vector,
1583                                         enic->msix[i].devid);
1584                 break;
1585         default:
1586                 break;
1587         }
1588 }
1589
1590 static int enic_request_intr(struct enic *enic)
1591 {
1592         struct net_device *netdev = enic->netdev;
1593         unsigned int i;
1594         int err = 0;
1595
1596         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1597
1598         case VNIC_DEV_INTR_MODE_INTX:
1599
1600                 err = request_irq(enic->pdev->irq, enic_isr_legacy,
1601                         IRQF_SHARED, netdev->name, netdev);
1602                 break;
1603
1604         case VNIC_DEV_INTR_MODE_MSI:
1605
1606                 err = request_irq(enic->pdev->irq, enic_isr_msi,
1607                         0, netdev->name, enic);
1608                 break;
1609
1610         case VNIC_DEV_INTR_MODE_MSIX:
1611
1612                 sprintf(enic->msix[ENIC_MSIX_RQ].devname,
1613                         "%.11s-rx-0", netdev->name);
1614                 enic->msix[ENIC_MSIX_RQ].isr = enic_isr_msix_rq;
1615                 enic->msix[ENIC_MSIX_RQ].devid = enic;
1616
1617                 sprintf(enic->msix[ENIC_MSIX_WQ].devname,
1618                         "%.11s-tx-0", netdev->name);
1619                 enic->msix[ENIC_MSIX_WQ].isr = enic_isr_msix_wq;
1620                 enic->msix[ENIC_MSIX_WQ].devid = enic;
1621
1622                 sprintf(enic->msix[ENIC_MSIX_ERR].devname,
1623                         "%.11s-err", netdev->name);
1624                 enic->msix[ENIC_MSIX_ERR].isr = enic_isr_msix_err;
1625                 enic->msix[ENIC_MSIX_ERR].devid = enic;
1626
1627                 sprintf(enic->msix[ENIC_MSIX_NOTIFY].devname,
1628                         "%.11s-notify", netdev->name);
1629                 enic->msix[ENIC_MSIX_NOTIFY].isr = enic_isr_msix_notify;
1630                 enic->msix[ENIC_MSIX_NOTIFY].devid = enic;
1631
1632                 for (i = 0; i < ARRAY_SIZE(enic->msix); i++) {
1633                         err = request_irq(enic->msix_entry[i].vector,
1634                                 enic->msix[i].isr, 0,
1635                                 enic->msix[i].devname,
1636                                 enic->msix[i].devid);
1637                         if (err) {
1638                                 enic_free_intr(enic);
1639                                 break;
1640                         }
1641                         enic->msix[i].requested = 1;
1642                 }
1643
1644                 break;
1645
1646         default:
1647                 break;
1648         }
1649
1650         return err;
1651 }
1652
1653 static void enic_synchronize_irqs(struct enic *enic)
1654 {
1655         unsigned int i;
1656
1657         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1658         case VNIC_DEV_INTR_MODE_INTX:
1659         case VNIC_DEV_INTR_MODE_MSI:
1660                 synchronize_irq(enic->pdev->irq);
1661                 break;
1662         case VNIC_DEV_INTR_MODE_MSIX:
1663                 for (i = 0; i < enic->intr_count; i++)
1664                         synchronize_irq(enic->msix_entry[i].vector);
1665                 break;
1666         default:
1667                 break;
1668         }
1669 }
1670
1671 static int enic_dev_notify_set(struct enic *enic)
1672 {
1673         int err;
1674
1675         spin_lock(&enic->devcmd_lock);
1676         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1677         case VNIC_DEV_INTR_MODE_INTX:
1678                 err = vnic_dev_notify_set(enic->vdev, ENIC_INTX_NOTIFY);
1679                 break;
1680         case VNIC_DEV_INTR_MODE_MSIX:
1681                 err = vnic_dev_notify_set(enic->vdev, ENIC_MSIX_NOTIFY);
1682                 break;
1683         default:
1684                 err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */);
1685                 break;
1686         }
1687         spin_unlock(&enic->devcmd_lock);
1688
1689         return err;
1690 }
1691
1692 static int enic_dev_notify_unset(struct enic *enic)
1693 {
1694         int err;
1695
1696         spin_lock(&enic->devcmd_lock);
1697         err = vnic_dev_notify_unset(enic->vdev);
1698         spin_unlock(&enic->devcmd_lock);
1699
1700         return err;
1701 }
1702
1703 static int enic_dev_enable(struct enic *enic)
1704 {
1705         int err;
1706
1707         spin_lock(&enic->devcmd_lock);
1708         err = vnic_dev_enable(enic->vdev);
1709         spin_unlock(&enic->devcmd_lock);
1710
1711         return err;
1712 }
1713
1714 static int enic_dev_disable(struct enic *enic)
1715 {
1716         int err;
1717
1718         spin_lock(&enic->devcmd_lock);
1719         err = vnic_dev_disable(enic->vdev);
1720         spin_unlock(&enic->devcmd_lock);
1721
1722         return err;
1723 }
1724
1725 static void enic_notify_timer_start(struct enic *enic)
1726 {
1727         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1728         case VNIC_DEV_INTR_MODE_MSI:
1729                 mod_timer(&enic->notify_timer, jiffies);
1730                 break;
1731         default:
1732                 /* Using intr for notification for INTx/MSI-X */
1733                 break;
1734         };
1735 }
1736
1737 /* rtnl lock is held, process context */
1738 static int enic_open(struct net_device *netdev)
1739 {
1740         struct enic *enic = netdev_priv(netdev);
1741         unsigned int i;
1742         int err;
1743
1744         err = enic_request_intr(enic);
1745         if (err) {
1746                 netdev_err(netdev, "Unable to request irq.\n");
1747                 return err;
1748         }
1749
1750         err = enic_dev_notify_set(enic);
1751         if (err) {
1752                 netdev_err(netdev,
1753                         "Failed to alloc notify buffer, aborting.\n");
1754                 goto err_out_free_intr;
1755         }
1756
1757         for (i = 0; i < enic->rq_count; i++) {
1758                 vnic_rq_fill(&enic->rq[i], enic->rq_alloc_buf);
1759                 /* Need at least one buffer on ring to get going */
1760                 if (vnic_rq_desc_used(&enic->rq[i]) == 0) {
1761                         netdev_err(netdev, "Unable to alloc receive buffers\n");
1762                         err = -ENOMEM;
1763                         goto err_out_notify_unset;
1764                 }
1765         }
1766
1767         for (i = 0; i < enic->wq_count; i++)
1768                 vnic_wq_enable(&enic->wq[i]);
1769         for (i = 0; i < enic->rq_count; i++)
1770                 vnic_rq_enable(&enic->rq[i]);
1771
1772         enic_dev_add_station_addr(enic);
1773         enic_set_multicast_list(netdev);
1774
1775         netif_wake_queue(netdev);
1776         napi_enable(&enic->napi);
1777         enic_dev_enable(enic);
1778
1779         for (i = 0; i < enic->intr_count; i++)
1780                 vnic_intr_unmask(&enic->intr[i]);
1781
1782         enic_notify_timer_start(enic);
1783
1784         return 0;
1785
1786 err_out_notify_unset:
1787         enic_dev_notify_unset(enic);
1788 err_out_free_intr:
1789         enic_free_intr(enic);
1790
1791         return err;
1792 }
1793
1794 /* rtnl lock is held, process context */
1795 static int enic_stop(struct net_device *netdev)
1796 {
1797         struct enic *enic = netdev_priv(netdev);
1798         unsigned int i;
1799         int err;
1800
1801         for (i = 0; i < enic->intr_count; i++) {
1802                 vnic_intr_mask(&enic->intr[i]);
1803                 (void)vnic_intr_masked(&enic->intr[i]); /* flush write */
1804         }
1805
1806         enic_synchronize_irqs(enic);
1807
1808         del_timer_sync(&enic->notify_timer);
1809
1810         enic_dev_disable(enic);
1811         napi_disable(&enic->napi);
1812         netif_carrier_off(netdev);
1813         netif_tx_disable(netdev);
1814         enic_dev_del_station_addr(enic);
1815
1816         for (i = 0; i < enic->wq_count; i++) {
1817                 err = vnic_wq_disable(&enic->wq[i]);
1818                 if (err)
1819                         return err;
1820         }
1821         for (i = 0; i < enic->rq_count; i++) {
1822                 err = vnic_rq_disable(&enic->rq[i]);
1823                 if (err)
1824                         return err;
1825         }
1826
1827         enic_dev_notify_unset(enic);
1828         enic_free_intr(enic);
1829
1830         for (i = 0; i < enic->wq_count; i++)
1831                 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
1832         for (i = 0; i < enic->rq_count; i++)
1833                 vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
1834         for (i = 0; i < enic->cq_count; i++)
1835                 vnic_cq_clean(&enic->cq[i]);
1836         for (i = 0; i < enic->intr_count; i++)
1837                 vnic_intr_clean(&enic->intr[i]);
1838
1839         return 0;
1840 }
1841
1842 static int enic_change_mtu(struct net_device *netdev, int new_mtu)
1843 {
1844         struct enic *enic = netdev_priv(netdev);
1845         int running = netif_running(netdev);
1846
1847         if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU)
1848                 return -EINVAL;
1849
1850         if (running)
1851                 enic_stop(netdev);
1852
1853         netdev->mtu = new_mtu;
1854
1855         if (netdev->mtu > enic->port_mtu)
1856                 netdev_warn(netdev,
1857                         "interface MTU (%d) set higher than port MTU (%d)\n",
1858                         netdev->mtu, enic->port_mtu);
1859
1860         if (running)
1861                 enic_open(netdev);
1862
1863         return 0;
1864 }
1865
1866 #ifdef CONFIG_NET_POLL_CONTROLLER
1867 static void enic_poll_controller(struct net_device *netdev)
1868 {
1869         struct enic *enic = netdev_priv(netdev);
1870         struct vnic_dev *vdev = enic->vdev;
1871
1872         switch (vnic_dev_get_intr_mode(vdev)) {
1873         case VNIC_DEV_INTR_MODE_MSIX:
1874                 enic_isr_msix_rq(enic->pdev->irq, enic);
1875                 enic_isr_msix_wq(enic->pdev->irq, enic);
1876                 break;
1877         case VNIC_DEV_INTR_MODE_MSI:
1878                 enic_isr_msi(enic->pdev->irq, enic);
1879                 break;
1880         case VNIC_DEV_INTR_MODE_INTX:
1881                 enic_isr_legacy(enic->pdev->irq, netdev);
1882                 break;
1883         default:
1884                 break;
1885         }
1886 }
1887 #endif
1888
1889 static int enic_dev_wait(struct vnic_dev *vdev,
1890         int (*start)(struct vnic_dev *, int),
1891         int (*finished)(struct vnic_dev *, int *),
1892         int arg)
1893 {
1894         unsigned long time;
1895         int done;
1896         int err;
1897
1898         BUG_ON(in_interrupt());
1899
1900         err = start(vdev, arg);
1901         if (err)
1902                 return err;
1903
1904         /* Wait for func to complete...2 seconds max
1905          */
1906
1907         time = jiffies + (HZ * 2);
1908         do {
1909
1910                 err = finished(vdev, &done);
1911                 if (err)
1912                         return err;
1913
1914                 if (done)
1915                         return 0;
1916
1917                 schedule_timeout_uninterruptible(HZ / 10);
1918
1919         } while (time_after(time, jiffies));
1920
1921         return -ETIMEDOUT;
1922 }
1923
1924 static int enic_dev_open(struct enic *enic)
1925 {
1926         int err;
1927
1928         err = enic_dev_wait(enic->vdev, vnic_dev_open,
1929                 vnic_dev_open_done, 0);
1930         if (err)
1931                 dev_err(enic_get_dev(enic), "vNIC device open failed, err %d\n",
1932                         err);
1933
1934         return err;
1935 }
1936
1937 static int enic_dev_hang_reset(struct enic *enic)
1938 {
1939         int err;
1940
1941         err = enic_dev_wait(enic->vdev, vnic_dev_hang_reset,
1942                 vnic_dev_hang_reset_done, 0);
1943         if (err)
1944                 netdev_err(enic->netdev, "vNIC hang reset failed, err %d\n",
1945                         err);
1946
1947         return err;
1948 }
1949
1950 static int enic_set_niccfg(struct enic *enic)
1951 {
1952         const u8 rss_default_cpu = 0;
1953         const u8 rss_hash_type = 0;
1954         const u8 rss_hash_bits = 0;
1955         const u8 rss_base_cpu = 0;
1956         const u8 rss_enable = 0;
1957         const u8 tso_ipid_split_en = 0;
1958         const u8 ig_vlan_strip_en = 1;
1959         int err;
1960
1961         /* Enable VLAN tag stripping.  RSS not enabled (yet).
1962          */
1963
1964         spin_lock(&enic->devcmd_lock);
1965         err = enic_set_nic_cfg(enic,
1966                 rss_default_cpu, rss_hash_type,
1967                 rss_hash_bits, rss_base_cpu,
1968                 rss_enable, tso_ipid_split_en,
1969                 ig_vlan_strip_en);
1970         spin_unlock(&enic->devcmd_lock);
1971
1972         return err;
1973 }
1974
1975 static int enic_dev_hang_notify(struct enic *enic)
1976 {
1977         int err;
1978
1979         spin_lock(&enic->devcmd_lock);
1980         err = vnic_dev_hang_notify(enic->vdev);
1981         spin_unlock(&enic->devcmd_lock);
1982
1983         return err;
1984 }
1985
1986 int enic_dev_set_ig_vlan_rewrite_mode(struct enic *enic)
1987 {
1988         int err;
1989
1990         spin_lock(&enic->devcmd_lock);
1991         err = vnic_dev_set_ig_vlan_rewrite_mode(enic->vdev,
1992                 IG_VLAN_REWRITE_MODE_PRIORITY_TAG_DEFAULT_VLAN);
1993         spin_unlock(&enic->devcmd_lock);
1994
1995         return err;
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_multicast_list(enic);
2011         enic_init_vnic_resources(enic);
2012         enic_set_niccfg(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 = 1;
2022         unsigned int m = 1;
2023         unsigned int i;
2024
2025         /* Set interrupt mode (INTx, MSI, MSI-X) depending
2026          * 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         if (enic->config.intr_mode < 1 &&
2040             enic->rq_count >= n &&
2041             enic->wq_count >= m &&
2042             enic->cq_count >= n + m &&
2043             enic->intr_count >= n + m + 2 &&
2044             !pci_enable_msix(enic->pdev, enic->msix_entry, n + m + 2)) {
2045
2046                 enic->rq_count = n;
2047                 enic->wq_count = m;
2048                 enic->cq_count = n + m;
2049                 enic->intr_count = n + m + 2;
2050
2051                 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSIX);
2052
2053                 return 0;
2054         }
2055
2056         /* Next try MSI
2057          *
2058          * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR
2059          */
2060
2061         if (enic->config.intr_mode < 2 &&
2062             enic->rq_count >= 1 &&
2063             enic->wq_count >= 1 &&
2064             enic->cq_count >= 2 &&
2065             enic->intr_count >= 1 &&
2066             !pci_enable_msi(enic->pdev)) {
2067
2068                 enic->rq_count = 1;
2069                 enic->wq_count = 1;
2070                 enic->cq_count = 2;
2071                 enic->intr_count = 1;
2072
2073                 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI);
2074
2075                 return 0;
2076         }
2077
2078         /* Next try INTx
2079          *
2080          * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs
2081          * (the first INTR is used for WQ/RQ)
2082          * (the second INTR is used for WQ/RQ errors)
2083          * (the last INTR is used for notifications)
2084          */
2085
2086         if (enic->config.intr_mode < 3 &&
2087             enic->rq_count >= 1 &&
2088             enic->wq_count >= 1 &&
2089             enic->cq_count >= 2 &&
2090             enic->intr_count >= 3) {
2091
2092                 enic->rq_count = 1;
2093                 enic->wq_count = 1;
2094                 enic->cq_count = 2;
2095                 enic->intr_count = 3;
2096
2097                 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX);
2098
2099                 return 0;
2100         }
2101
2102         vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2103
2104         return -EINVAL;
2105 }
2106
2107 static void enic_clear_intr_mode(struct enic *enic)
2108 {
2109         switch (vnic_dev_get_intr_mode(enic->vdev)) {
2110         case VNIC_DEV_INTR_MODE_MSIX:
2111                 pci_disable_msix(enic->pdev);
2112                 break;
2113         case VNIC_DEV_INTR_MODE_MSI:
2114                 pci_disable_msi(enic->pdev);
2115                 break;
2116         default:
2117                 break;
2118         }
2119
2120         vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2121 }
2122
2123 static const struct net_device_ops enic_netdev_dynamic_ops = {
2124         .ndo_open               = enic_open,
2125         .ndo_stop               = enic_stop,
2126         .ndo_start_xmit         = enic_hard_start_xmit,
2127         .ndo_get_stats          = enic_get_stats,
2128         .ndo_validate_addr      = eth_validate_addr,
2129         .ndo_set_multicast_list = enic_set_multicast_list,
2130         .ndo_set_mac_address    = enic_set_mac_address_dynamic,
2131         .ndo_change_mtu         = enic_change_mtu,
2132         .ndo_vlan_rx_register   = enic_vlan_rx_register,
2133         .ndo_vlan_rx_add_vid    = enic_vlan_rx_add_vid,
2134         .ndo_vlan_rx_kill_vid   = enic_vlan_rx_kill_vid,
2135         .ndo_tx_timeout         = enic_tx_timeout,
2136         .ndo_set_vf_port        = enic_set_vf_port,
2137         .ndo_get_vf_port        = enic_get_vf_port,
2138 #ifdef CONFIG_NET_POLL_CONTROLLER
2139         .ndo_poll_controller    = enic_poll_controller,
2140 #endif
2141 };
2142
2143 static const struct net_device_ops enic_netdev_ops = {
2144         .ndo_open               = enic_open,
2145         .ndo_stop               = enic_stop,
2146         .ndo_start_xmit         = enic_hard_start_xmit,
2147         .ndo_get_stats          = enic_get_stats,
2148         .ndo_validate_addr      = eth_validate_addr,
2149         .ndo_set_mac_address    = enic_set_mac_address,
2150         .ndo_set_multicast_list = enic_set_multicast_list,
2151         .ndo_change_mtu         = enic_change_mtu,
2152         .ndo_vlan_rx_register   = enic_vlan_rx_register,
2153         .ndo_vlan_rx_add_vid    = enic_vlan_rx_add_vid,
2154         .ndo_vlan_rx_kill_vid   = enic_vlan_rx_kill_vid,
2155         .ndo_tx_timeout         = enic_tx_timeout,
2156 #ifdef CONFIG_NET_POLL_CONTROLLER
2157         .ndo_poll_controller    = enic_poll_controller,
2158 #endif
2159 };
2160
2161 void enic_dev_deinit(struct enic *enic)
2162 {
2163         netif_napi_del(&enic->napi);
2164         enic_free_vnic_resources(enic);
2165         enic_clear_intr_mode(enic);
2166 }
2167
2168 static int enic_dev_stats_clear(struct enic *enic)
2169 {
2170         int err;
2171
2172         spin_lock(&enic->devcmd_lock);
2173         err = vnic_dev_stats_clear(enic->vdev);
2174         spin_unlock(&enic->devcmd_lock);
2175
2176         return err;
2177 }
2178
2179 int enic_dev_init(struct enic *enic)
2180 {
2181         struct device *dev = enic_get_dev(enic);
2182         struct net_device *netdev = enic->netdev;
2183         int err;
2184
2185         /* Get vNIC configuration
2186          */
2187
2188         err = enic_get_vnic_config(enic);
2189         if (err) {
2190                 dev_err(dev, "Get vNIC configuration failed, aborting\n");
2191                 return err;
2192         }
2193
2194         /* Get available resource counts
2195          */
2196
2197         enic_get_res_counts(enic);
2198
2199         /* Set interrupt mode based on resource counts and system
2200          * capabilities
2201          */
2202
2203         err = enic_set_intr_mode(enic);
2204         if (err) {
2205                 dev_err(dev, "Failed to set intr mode based on resource "
2206                         "counts and system capabilities, aborting\n");
2207                 return err;
2208         }
2209
2210         /* Allocate and configure vNIC resources
2211          */
2212
2213         err = enic_alloc_vnic_resources(enic);
2214         if (err) {
2215                 dev_err(dev, "Failed to alloc vNIC resources, aborting\n");
2216                 goto err_out_free_vnic_resources;
2217         }
2218
2219         enic_init_vnic_resources(enic);
2220
2221         /* Clear LIF stats
2222          */
2223         enic_dev_stats_clear(enic);
2224
2225         err = enic_set_rq_alloc_buf(enic);
2226         if (err) {
2227                 dev_err(dev, "Failed to set RQ buffer allocator, aborting\n");
2228                 goto err_out_free_vnic_resources;
2229         }
2230
2231         err = enic_set_niccfg(enic);
2232         if (err) {
2233                 dev_err(dev, "Failed to config nic, aborting\n");
2234                 goto err_out_free_vnic_resources;
2235         }
2236
2237         err = enic_dev_set_ig_vlan_rewrite_mode(enic);
2238         if (err) {
2239                 netdev_err(netdev,
2240                         "Failed to set ingress vlan rewrite mode, aborting.\n");
2241                 goto err_out_free_vnic_resources;
2242         }
2243
2244         switch (vnic_dev_get_intr_mode(enic->vdev)) {
2245         default:
2246                 netif_napi_add(netdev, &enic->napi, enic_poll, 64);
2247                 break;
2248         case VNIC_DEV_INTR_MODE_MSIX:
2249                 netif_napi_add(netdev, &enic->napi, enic_poll_msix, 64);
2250                 break;
2251         }
2252
2253         return 0;
2254
2255 err_out_free_vnic_resources:
2256         enic_clear_intr_mode(enic);
2257         enic_free_vnic_resources(enic);
2258
2259         return err;
2260 }
2261
2262 static void enic_iounmap(struct enic *enic)
2263 {
2264         unsigned int i;
2265
2266         for (i = 0; i < ARRAY_SIZE(enic->bar); i++)
2267                 if (enic->bar[i].vaddr)
2268                         iounmap(enic->bar[i].vaddr);
2269 }
2270
2271 static int __devinit enic_probe(struct pci_dev *pdev,
2272         const struct pci_device_id *ent)
2273 {
2274         struct device *dev = &pdev->dev;
2275         struct net_device *netdev;
2276         struct enic *enic;
2277         int using_dac = 0;
2278         unsigned int i;
2279         int err;
2280
2281         /* Allocate net device structure and initialize.  Private
2282          * instance data is initialized to zero.
2283          */
2284
2285         netdev = alloc_etherdev(sizeof(struct enic));
2286         if (!netdev) {
2287                 pr_err("Etherdev alloc failed, aborting\n");
2288                 return -ENOMEM;
2289         }
2290
2291         pci_set_drvdata(pdev, netdev);
2292
2293         SET_NETDEV_DEV(netdev, &pdev->dev);
2294
2295         enic = netdev_priv(netdev);
2296         enic->netdev = netdev;
2297         enic->pdev = pdev;
2298
2299         /* Setup PCI resources
2300          */
2301
2302         err = pci_enable_device_mem(pdev);
2303         if (err) {
2304                 dev_err(dev, "Cannot enable PCI device, aborting\n");
2305                 goto err_out_free_netdev;
2306         }
2307
2308         err = pci_request_regions(pdev, DRV_NAME);
2309         if (err) {
2310                 dev_err(dev, "Cannot request PCI regions, aborting\n");
2311                 goto err_out_disable_device;
2312         }
2313
2314         pci_set_master(pdev);
2315
2316         /* Query PCI controller on system for DMA addressing
2317          * limitation for the device.  Try 40-bit first, and
2318          * fail to 32-bit.
2319          */
2320
2321         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(40));
2322         if (err) {
2323                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2324                 if (err) {
2325                         dev_err(dev, "No usable DMA configuration, aborting\n");
2326                         goto err_out_release_regions;
2327                 }
2328                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
2329                 if (err) {
2330                         dev_err(dev, "Unable to obtain %u-bit DMA "
2331                                 "for consistent allocations, aborting\n", 32);
2332                         goto err_out_release_regions;
2333                 }
2334         } else {
2335                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(40));
2336                 if (err) {
2337                         dev_err(dev, "Unable to obtain %u-bit DMA "
2338                                 "for consistent allocations, aborting\n", 40);
2339                         goto err_out_release_regions;
2340                 }
2341                 using_dac = 1;
2342         }
2343
2344         /* Map vNIC resources from BAR0-5
2345          */
2346
2347         for (i = 0; i < ARRAY_SIZE(enic->bar); i++) {
2348                 if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
2349                         continue;
2350                 enic->bar[i].len = pci_resource_len(pdev, i);
2351                 enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len);
2352                 if (!enic->bar[i].vaddr) {
2353                         dev_err(dev, "Cannot memory-map BAR %d, aborting\n", i);
2354                         err = -ENODEV;
2355                         goto err_out_iounmap;
2356                 }
2357                 enic->bar[i].bus_addr = pci_resource_start(pdev, i);
2358         }
2359
2360         /* Register vNIC device
2361          */
2362
2363         enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar,
2364                 ARRAY_SIZE(enic->bar));
2365         if (!enic->vdev) {
2366                 dev_err(dev, "vNIC registration failed, aborting\n");
2367                 err = -ENODEV;
2368                 goto err_out_iounmap;
2369         }
2370
2371         /* Issue device open to get device in known state
2372          */
2373
2374         err = enic_dev_open(enic);
2375         if (err) {
2376                 dev_err(dev, "vNIC dev open failed, aborting\n");
2377                 goto err_out_vnic_unregister;
2378         }
2379
2380         /* Issue device init to initialize the vnic-to-switch link.
2381          * We'll start with carrier off and wait for link UP
2382          * notification later to turn on carrier.  We don't need
2383          * to wait here for the vnic-to-switch link initialization
2384          * to complete; link UP notification is the indication that
2385          * the process is complete.
2386          */
2387
2388         netif_carrier_off(netdev);
2389
2390         /* Do not call dev_init for a dynamic vnic.
2391          * For a dynamic vnic, init_prov_info will be
2392          * called later by an upper layer.
2393          */
2394
2395         if (!enic_is_dynamic(enic)) {
2396                 err = vnic_dev_init(enic->vdev, 0);
2397                 if (err) {
2398                         dev_err(dev, "vNIC dev init failed, aborting\n");
2399                         goto err_out_dev_close;
2400                 }
2401         }
2402
2403         /* Setup devcmd lock
2404          */
2405
2406         spin_lock_init(&enic->devcmd_lock);
2407
2408         err = enic_dev_init(enic);
2409         if (err) {
2410                 dev_err(dev, "Device initialization failed, aborting\n");
2411                 goto err_out_dev_close;
2412         }
2413
2414         /* Setup notification timer, HW reset task, and wq locks
2415          */
2416
2417         init_timer(&enic->notify_timer);
2418         enic->notify_timer.function = enic_notify_timer;
2419         enic->notify_timer.data = (unsigned long)enic;
2420
2421         INIT_WORK(&enic->reset, enic_reset);
2422
2423         for (i = 0; i < enic->wq_count; i++)
2424                 spin_lock_init(&enic->wq_lock[i]);
2425
2426         /* Register net device
2427          */
2428
2429         enic->port_mtu = enic->config.mtu;
2430         (void)enic_change_mtu(netdev, enic->port_mtu);
2431
2432         err = enic_set_mac_addr(netdev, enic->mac_addr);
2433         if (err) {
2434                 dev_err(dev, "Invalid MAC address, aborting\n");
2435                 goto err_out_dev_deinit;
2436         }
2437
2438         enic->tx_coalesce_usecs = enic->config.intr_timer_usec;
2439         enic->rx_coalesce_usecs = enic->tx_coalesce_usecs;
2440
2441         if (enic_is_dynamic(enic))
2442                 netdev->netdev_ops = &enic_netdev_dynamic_ops;
2443         else
2444                 netdev->netdev_ops = &enic_netdev_ops;
2445
2446         netdev->watchdog_timeo = 2 * HZ;
2447         netdev->ethtool_ops = &enic_ethtool_ops;
2448
2449         netdev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
2450         if (ENIC_SETTING(enic, LOOP)) {
2451                 netdev->features &= ~NETIF_F_HW_VLAN_TX;
2452                 enic->loop_enable = 1;
2453                 enic->loop_tag = enic->config.loop_tag;
2454                 dev_info(dev, "loopback tag=0x%04x\n", enic->loop_tag);
2455         }
2456         if (ENIC_SETTING(enic, TXCSUM))
2457                 netdev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
2458         if (ENIC_SETTING(enic, TSO))
2459                 netdev->features |= NETIF_F_TSO |
2460                         NETIF_F_TSO6 | NETIF_F_TSO_ECN;
2461         if (ENIC_SETTING(enic, LRO))
2462                 netdev->features |= NETIF_F_GRO;
2463         if (using_dac)
2464                 netdev->features |= NETIF_F_HIGHDMA;
2465
2466         enic->csum_rx_enabled = ENIC_SETTING(enic, RXCSUM);
2467
2468         err = register_netdev(netdev);
2469         if (err) {
2470                 dev_err(dev, "Cannot register net device, aborting\n");
2471                 goto err_out_dev_deinit;
2472         }
2473
2474         return 0;
2475
2476 err_out_dev_deinit:
2477         enic_dev_deinit(enic);
2478 err_out_dev_close:
2479         vnic_dev_close(enic->vdev);
2480 err_out_vnic_unregister:
2481         vnic_dev_unregister(enic->vdev);
2482 err_out_iounmap:
2483         enic_iounmap(enic);
2484 err_out_release_regions:
2485         pci_release_regions(pdev);
2486 err_out_disable_device:
2487         pci_disable_device(pdev);
2488 err_out_free_netdev:
2489         pci_set_drvdata(pdev, NULL);
2490         free_netdev(netdev);
2491
2492         return err;
2493 }
2494
2495 static void __devexit enic_remove(struct pci_dev *pdev)
2496 {
2497         struct net_device *netdev = pci_get_drvdata(pdev);
2498
2499         if (netdev) {
2500                 struct enic *enic = netdev_priv(netdev);
2501
2502                 flush_scheduled_work();
2503                 unregister_netdev(netdev);
2504                 enic_dev_deinit(enic);
2505                 vnic_dev_close(enic->vdev);
2506                 vnic_dev_unregister(enic->vdev);
2507                 enic_iounmap(enic);
2508                 pci_release_regions(pdev);
2509                 pci_disable_device(pdev);
2510                 pci_set_drvdata(pdev, NULL);
2511                 free_netdev(netdev);
2512         }
2513 }
2514
2515 static struct pci_driver enic_driver = {
2516         .name = DRV_NAME,
2517         .id_table = enic_id_table,
2518         .probe = enic_probe,
2519         .remove = __devexit_p(enic_remove),
2520 };
2521
2522 static int __init enic_init_module(void)
2523 {
2524         pr_info("%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
2525
2526         return pci_register_driver(&enic_driver);
2527 }
2528
2529 static void __exit enic_cleanup_module(void)
2530 {
2531         pci_unregister_driver(&enic_driver);
2532 }
2533
2534 module_init(enic_init_module);
2535 module_exit(enic_cleanup_module);