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/in.h>
  35 #include <linux/ip.h>
  36 #include <linux/ipv6.h>
  37 #include <linux/tcp.h>
  38 #include <linux/rtnetlink.h>
  39 #include <linux/prefetch.h>
  40 #include <net/ip6_checksum.h>
  41 #include <linux/ktime.h>
  42 #include <linux/numa.h>
  43 #ifdef CONFIG_RFS_ACCEL
  44 #include <linux/cpu_rmap.h>
  45 #endif
  46 #include <linux/crash_dump.h>
  47 #include <net/busy_poll.h>
  48 #include <net/vxlan.h>
  49
  50 #include "cq_enet_desc.h"
  51 #include "vnic_dev.h"
  52 #include "vnic_intr.h"
  53 #include "vnic_stats.h"
  54 #include "vnic_vic.h"
  55 #include "enic_res.h"
  56 #include "enic.h"
  57 #include "enic_dev.h"
  58 #include "enic_pp.h"
  59 #include "enic_clsf.h"
  60
  61 #define ENIC_NOTIFY_TIMER_PERIOD        (2 * HZ)
  62 #define WQ_ENET_MAX_DESC_LEN            (1 << WQ_ENET_LEN_BITS)
  63 #define MAX_TSO                         (1 << 16)
  64 #define ENIC_DESC_MAX_SPLITS            (MAX_TSO / WQ_ENET_MAX_DESC_LEN + 1)
  65
  66 #define PCI_DEVICE_ID_CISCO_VIC_ENET         0x0043  /* ethernet vnic */
  67 #define PCI_DEVICE_ID_CISCO_VIC_ENET_DYN     0x0044  /* enet dynamic vnic */
  68 #define PCI_DEVICE_ID_CISCO_VIC_ENET_VF      0x0071  /* enet SRIOV VF */
  69
  70 #define RX_COPYBREAK_DEFAULT            256
  71
  72 /* Supported devices */
  73 static const struct pci_device_id enic_id_table[] = {
  74         { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET) },
  75         { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_DYN) },
  76         { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_VF) },
  77         { 0, }  /* end of table */
  78 };
  79
  80 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  81 MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>");
  82 MODULE_LICENSE("GPL");
  83 MODULE_VERSION(DRV_VERSION);
  84 MODULE_DEVICE_TABLE(pci, enic_id_table);
  85
  86 #define ENIC_LARGE_PKT_THRESHOLD                1000
  87 #define ENIC_MAX_COALESCE_TIMERS                10
  88 /*  Interrupt moderation table, which will be used to decide the
  89  *  coalescing timer values
  90  *  {rx_rate in Mbps, mapping percentage of the range}
  91  */
  92 static struct enic_intr_mod_table mod_table[ENIC_MAX_COALESCE_TIMERS + 1] = {
  93         {4000,  0},
  94         {4400, 10},
  95         {5060, 20},
  96         {5230, 30},
  97         {5540, 40},
  98         {5820, 50},
  99         {6120, 60},
 100         {6435, 70},
 101         {6745, 80},
 102         {7000, 90},
 103         {0xFFFFFFFF, 100}
 104 };
 105
 106 /* This table helps the driver to pick different ranges for rx coalescing
 107  * timer depending on the link speed.
 108  */
 109 static struct enic_intr_mod_range mod_range[ENIC_MAX_LINK_SPEEDS] = {
 110         {0,  0}, /* 0  - 4  Gbps */
 111         {0,  3}, /* 4  - 10 Gbps */
 112         {3,  6}, /* 10 - 40 Gbps */
 113 };
 114
 115 static void enic_init_affinity_hint(struct enic *enic)
 116 {
 117         int numa_node = dev_to_node(&enic->pdev->dev);
 118         int i;
 119
 120         for (i = 0; i < enic->intr_count; i++) {
 121                 if (enic_is_err_intr(enic, i) || enic_is_notify_intr(enic, i) ||
 122                     (enic->msix[i].affinity_mask &&
 123                      !cpumask_empty(enic->msix[i].affinity_mask)))
 124                         continue;
 125                 if (zalloc_cpumask_var(&enic->msix[i].affinity_mask,
 126                                        GFP_KERNEL))
 127                         cpumask_set_cpu(cpumask_local_spread(i, numa_node),
 128                                         enic->msix[i].affinity_mask);
 129         }
 130 }
 131
 132 static void enic_free_affinity_hint(struct enic *enic)
 133 {
 134         int i;
 135
 136         for (i = 0; i < enic->intr_count; i++) {
 137                 if (enic_is_err_intr(enic, i) || enic_is_notify_intr(enic, i))
 138                         continue;
 139                 free_cpumask_var(enic->msix[i].affinity_mask);
 140         }
 141 }
 142
 143 static void enic_set_affinity_hint(struct enic *enic)
 144 {
 145         int i;
 146         int err;
 147
 148         for (i = 0; i < enic->intr_count; i++) {
 149                 if (enic_is_err_intr(enic, i)           ||
 150                     enic_is_notify_intr(enic, i)        ||
 151                     !enic->msix[i].affinity_mask        ||
 152                     cpumask_empty(enic->msix[i].affinity_mask))
 153                         continue;
 154                 err = irq_set_affinity_hint(enic->msix_entry[i].vector,
 155                                             enic->msix[i].affinity_mask);
 156                 if (err)
 157                         netdev_warn(enic->netdev, "irq_set_affinity_hint failed, err %d\n",
 158                                     err);
 159         }
 160
 161         for (i = 0; i < enic->wq_count; i++) {
 162                 int wq_intr = enic_msix_wq_intr(enic, i);
 163
 164                 if (enic->msix[wq_intr].affinity_mask &&
 165                     !cpumask_empty(enic->msix[wq_intr].affinity_mask))
 166                         netif_set_xps_queue(enic->netdev,
 167                                             enic->msix[wq_intr].affinity_mask,
 168                                             i);
 169         }
 170 }
 171
 172 static void enic_unset_affinity_hint(struct enic *enic)
 173 {
 174         int i;
 175
 176         for (i = 0; i < enic->intr_count; i++)
 177                 irq_set_affinity_hint(enic->msix_entry[i].vector, NULL);
 178 }
 179
 180 static void enic_udp_tunnel_add(struct net_device *netdev,
 181                                 struct udp_tunnel_info *ti)
 182 {
 183         struct enic *enic = netdev_priv(netdev);
 184         __be16 port = ti->port;
 185         int err;
 186
 187         spin_lock_bh(&enic->devcmd_lock);
 188
 189         if (ti->type != UDP_TUNNEL_TYPE_VXLAN) {
 190                 netdev_info(netdev, "udp_tnl: only vxlan tunnel offload supported");
 191                 goto error;
 192         }
 193
 194         switch (ti->sa_family) {
 195         case AF_INET6:
 196                 if (!(enic->vxlan.flags & ENIC_VXLAN_OUTER_IPV6)) {
 197                         netdev_info(netdev, "vxlan: only IPv4 offload supported");
 198                         goto error;
 199                 }
 200                 /* Fall through */
 201         case AF_INET:
 202                 break;
 203         default:
 204                 goto error;
 205         }
 206
 207         if (enic->vxlan.vxlan_udp_port_number) {
 208                 if (ntohs(port) == enic->vxlan.vxlan_udp_port_number)
 209                         netdev_warn(netdev, "vxlan: udp port already offloaded");
 210                 else
 211                         netdev_info(netdev, "vxlan: offload supported for only one UDP port");
 212
 213                 goto error;
 214         }
 215         if ((vnic_dev_get_res_count(enic->vdev, RES_TYPE_WQ) != 1) &&
 216             !(enic->vxlan.flags & ENIC_VXLAN_MULTI_WQ)) {
 217                 netdev_info(netdev, "vxlan: vxlan offload with multi wq not supported on this adapter");
 218                 goto error;
 219         }
 220
 221         err = vnic_dev_overlay_offload_cfg(enic->vdev,
 222                                            OVERLAY_CFG_VXLAN_PORT_UPDATE,
 223                                            ntohs(port));
 224         if (err)
 225                 goto error;
 226
 227         err = vnic_dev_overlay_offload_ctrl(enic->vdev, OVERLAY_FEATURE_VXLAN,
 228                                             enic->vxlan.patch_level);
 229         if (err)
 230                 goto error;
 231
 232         enic->vxlan.vxlan_udp_port_number = ntohs(port);
 233
 234         netdev_info(netdev, "vxlan fw-vers-%d: offload enabled for udp port: %d, sa_family: %d ",
 235                     (int)enic->vxlan.patch_level, ntohs(port), ti->sa_family);
 236
 237         goto unlock;
 238
 239 error:
 240         netdev_info(netdev, "failed to offload udp port: %d, sa_family: %d, type: %d",
 241                     ntohs(port), ti->sa_family, ti->type);
 242 unlock:
 243         spin_unlock_bh(&enic->devcmd_lock);
 244 }
 245
 246 static void enic_udp_tunnel_del(struct net_device *netdev,
 247                                 struct udp_tunnel_info *ti)
 248 {
 249         struct enic *enic = netdev_priv(netdev);
 250         int err;
 251
 252         spin_lock_bh(&enic->devcmd_lock);
 253
 254         if ((ntohs(ti->port) != enic->vxlan.vxlan_udp_port_number) ||
 255             ti->type != UDP_TUNNEL_TYPE_VXLAN) {
 256                 netdev_info(netdev, "udp_tnl: port:%d, sa_family: %d, type: %d not offloaded",
 257                             ntohs(ti->port), ti->sa_family, ti->type);
 258                 goto unlock;
 259         }
 260
 261         err = vnic_dev_overlay_offload_ctrl(enic->vdev, OVERLAY_FEATURE_VXLAN,
 262                                             OVERLAY_OFFLOAD_DISABLE);
 263         if (err) {
 264                 netdev_err(netdev, "vxlan: del offload udp port: %d failed",
 265                            ntohs(ti->port));
 266                 goto unlock;
 267         }
 268
 269         enic->vxlan.vxlan_udp_port_number = 0;
 270
 271         netdev_info(netdev, "vxlan: del offload udp port %d, family %d\n",
 272                     ntohs(ti->port), ti->sa_family);
 273
 274 unlock:
 275         spin_unlock_bh(&enic->devcmd_lock);
 276 }
 277
 278 static netdev_features_t enic_features_check(struct sk_buff *skb,
 279                                              struct net_device *dev,
 280                                              netdev_features_t features)
 281 {
 282         const struct ethhdr *eth = (struct ethhdr *)skb_inner_mac_header(skb);
 283         struct enic *enic = netdev_priv(dev);
 284         struct udphdr *udph;
 285         u16 port = 0;
 286         u8 proto;
 287
 288         if (!skb->encapsulation)
 289                 return features;
 290
 291         features = vxlan_features_check(skb, features);
 292
 293         switch (vlan_get_protocol(skb)) {
 294         case htons(ETH_P_IPV6):
 295                 if (!(enic->vxlan.flags & ENIC_VXLAN_OUTER_IPV6))
 296                         goto out;
 297                 proto = ipv6_hdr(skb)->nexthdr;
 298                 break;
 299         case htons(ETH_P_IP):
 300                 proto = ip_hdr(skb)->protocol;
 301                 break;
 302         default:
 303                 goto out;
 304         }
 305
 306         switch (eth->h_proto) {
 307         case ntohs(ETH_P_IPV6):
 308                 if (!(enic->vxlan.flags & ENIC_VXLAN_INNER_IPV6))
 309                         goto out;
 310                 /* Fall through */
 311         case ntohs(ETH_P_IP):
 312                 break;
 313         default:
 314                 goto out;
 315         }
 316
 317
 318         if (proto == IPPROTO_UDP) {
 319                 udph = udp_hdr(skb);
 320                 port = be16_to_cpu(udph->dest);
 321         }
 322
 323         /* HW supports offload of only one UDP port. Remove CSUM and GSO MASK
 324          * for other UDP port tunnels
 325          */
 326         if (port  != enic->vxlan.vxlan_udp_port_number)
 327                 goto out;
 328
 329         return features;
 330
 331 out:
 332         return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK);
 333 }
 334
 335 int enic_is_dynamic(struct enic *enic)
 336 {
 337         return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_DYN;
 338 }
 339
 340 int enic_sriov_enabled(struct enic *enic)
 341 {
 342         return (enic->priv_flags & ENIC_SRIOV_ENABLED) ? 1 : 0;
 343 }
 344
 345 static int enic_is_sriov_vf(struct enic *enic)
 346 {
 347         return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_VF;
 348 }
 349
 350 int enic_is_valid_vf(struct enic *enic, int vf)
 351 {
 352 #ifdef CONFIG_PCI_IOV
 353         return vf >= 0 && vf < enic->num_vfs;
 354 #else
 355         return 0;
 356 #endif
 357 }
 358
 359 static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
 360 {
 361         struct enic *enic = vnic_dev_priv(wq->vdev);
 362
 363         if (buf->sop)
 364                 pci_unmap_single(enic->pdev, buf->dma_addr,
 365                         buf->len, PCI_DMA_TODEVICE);
 366         else
 367                 pci_unmap_page(enic->pdev, buf->dma_addr,
 368                         buf->len, PCI_DMA_TODEVICE);
 369
 370         if (buf->os_buf)
 371                 dev_kfree_skb_any(buf->os_buf);
 372 }
 373
 374 static void enic_wq_free_buf(struct vnic_wq *wq,
 375         struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque)
 376 {
 377         enic_free_wq_buf(wq, buf);
 378 }
 379
 380 static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
 381         u8 type, u16 q_number, u16 completed_index, void *opaque)
 382 {
 383         struct enic *enic = vnic_dev_priv(vdev);
 384
 385         spin_lock(&enic->wq_lock[q_number]);
 386
 387         vnic_wq_service(&enic->wq[q_number], cq_desc,
 388                 completed_index, enic_wq_free_buf,
 389                 opaque);
 390
 391         if (netif_tx_queue_stopped(netdev_get_tx_queue(enic->netdev, q_number)) &&
 392             vnic_wq_desc_avail(&enic->wq[q_number]) >=
 393             (MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS))
 394                 netif_wake_subqueue(enic->netdev, q_number);
 395
 396         spin_unlock(&enic->wq_lock[q_number]);
 397
 398         return 0;
 399 }
 400
 401 static bool enic_log_q_error(struct enic *enic)
 402 {
 403         unsigned int i;
 404         u32 error_status;
 405         bool err = false;
 406
 407         for (i = 0; i < enic->wq_count; i++) {
 408                 error_status = vnic_wq_error_status(&enic->wq[i]);
 409                 err |= error_status;
 410                 if (error_status)
 411                         netdev_err(enic->netdev, "WQ[%d] error_status %d\n",
 412                                 i, error_status);
 413         }
 414
 415         for (i = 0; i < enic->rq_count; i++) {
 416                 error_status = vnic_rq_error_status(&enic->rq[i]);
 417                 err |= error_status;
 418                 if (error_status)
 419                         netdev_err(enic->netdev, "RQ[%d] error_status %d\n",
 420                                 i, error_status);
 421         }
 422
 423         return err;
 424 }
 425
 426 static void enic_msglvl_check(struct enic *enic)
 427 {
 428         u32 msg_enable = vnic_dev_msg_lvl(enic->vdev);
 429
 430         if (msg_enable != enic->msg_enable) {
 431                 netdev_info(enic->netdev, "msg lvl changed from 0x%x to 0x%x\n",
 432                         enic->msg_enable, msg_enable);
 433                 enic->msg_enable = msg_enable;
 434         }
 435 }
 436
 437 static void enic_mtu_check(struct enic *enic)
 438 {
 439         u32 mtu = vnic_dev_mtu(enic->vdev);
 440         struct net_device *netdev = enic->netdev;
 441
 442         if (mtu && mtu != enic->port_mtu) {
 443                 enic->port_mtu = mtu;
 444                 if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) {
 445                         mtu = max_t(int, ENIC_MIN_MTU,
 446                                 min_t(int, ENIC_MAX_MTU, mtu));
 447                         if (mtu != netdev->mtu)
 448                                 schedule_work(&enic->change_mtu_work);
 449                 } else {
 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
 459 static void enic_link_check(struct enic *enic)
 460 {
 461         int link_status = vnic_dev_link_status(enic->vdev);
 462         int carrier_ok = netif_carrier_ok(enic->netdev);
 463
 464         if (link_status && !carrier_ok) {
 465                 netdev_info(enic->netdev, "Link UP\n");
 466                 netif_carrier_on(enic->netdev);
 467         } else if (!link_status && carrier_ok) {
 468                 netdev_info(enic->netdev, "Link DOWN\n");
 469                 netif_carrier_off(enic->netdev);
 470         }
 471 }
 472
 473 static void enic_notify_check(struct enic *enic)
 474 {
 475         enic_msglvl_check(enic);
 476         enic_mtu_check(enic);
 477         enic_link_check(enic);
 478 }
 479
 480 #define ENIC_TEST_INTR(pba, i) (pba & (1 << i))
 481
 482 static irqreturn_t enic_isr_legacy(int irq, void *data)
 483 {
 484         struct net_device *netdev = data;
 485         struct enic *enic = netdev_priv(netdev);
 486         unsigned int io_intr = enic_legacy_io_intr();
 487         unsigned int err_intr = enic_legacy_err_intr();
 488         unsigned int notify_intr = enic_legacy_notify_intr();
 489         u32 pba;
 490
 491         vnic_intr_mask(&enic->intr[io_intr]);
 492
 493         pba = vnic_intr_legacy_pba(enic->legacy_pba);
 494         if (!pba) {
 495                 vnic_intr_unmask(&enic->intr[io_intr]);
 496                 return IRQ_NONE;        /* not our interrupt */
 497         }
 498
 499         if (ENIC_TEST_INTR(pba, notify_intr)) {
 500                 enic_notify_check(enic);
 501                 vnic_intr_return_all_credits(&enic->intr[notify_intr]);
 502         }
 503
 504         if (ENIC_TEST_INTR(pba, err_intr)) {
 505                 vnic_intr_return_all_credits(&enic->intr[err_intr]);
 506                 enic_log_q_error(enic);
 507                 /* schedule recovery from WQ/RQ error */
 508                 schedule_work(&enic->reset);
 509                 return IRQ_HANDLED;
 510         }
 511
 512         if (ENIC_TEST_INTR(pba, io_intr))
 513                 napi_schedule_irqoff(&enic->napi[0]);
 514         else
 515                 vnic_intr_unmask(&enic->intr[io_intr]);
 516
 517         return IRQ_HANDLED;
 518 }
 519
 520 static irqreturn_t enic_isr_msi(int irq, void *data)
 521 {
 522         struct enic *enic = data;
 523
 524         /* With MSI, there is no sharing of interrupts, so this is
 525          * our interrupt and there is no need to ack it.  The device
 526          * is not providing per-vector masking, so the OS will not
 527          * write to PCI config space to mask/unmask the interrupt.
 528          * We're using mask_on_assertion for MSI, so the device
 529          * automatically masks the interrupt when the interrupt is
 530          * generated.  Later, when exiting polling, the interrupt
 531          * will be unmasked (see enic_poll).
 532          *
 533          * Also, the device uses the same PCIe Traffic Class (TC)
 534          * for Memory Write data and MSI, so there are no ordering
 535          * issues; the MSI will always arrive at the Root Complex
 536          * _after_ corresponding Memory Writes (i.e. descriptor
 537          * writes).
 538          */
 539
 540         napi_schedule_irqoff(&enic->napi[0]);
 541
 542         return IRQ_HANDLED;
 543 }
 544
 545 static irqreturn_t enic_isr_msix(int irq, void *data)
 546 {
 547         struct napi_struct *napi = data;
 548
 549         napi_schedule_irqoff(napi);
 550
 551         return IRQ_HANDLED;
 552 }
 553
 554 static irqreturn_t enic_isr_msix_err(int irq, void *data)
 555 {
 556         struct enic *enic = data;
 557         unsigned int intr = enic_msix_err_intr(enic);
 558
 559         vnic_intr_return_all_credits(&enic->intr[intr]);
 560
 561         if (enic_log_q_error(enic))
 562                 /* schedule recovery from WQ/RQ error */
 563                 schedule_work(&enic->reset);
 564
 565         return IRQ_HANDLED;
 566 }
 567
 568 static irqreturn_t enic_isr_msix_notify(int irq, void *data)
 569 {
 570         struct enic *enic = data;
 571         unsigned int intr = enic_msix_notify_intr(enic);
 572
 573         enic_notify_check(enic);
 574         vnic_intr_return_all_credits(&enic->intr[intr]);
 575
 576         return IRQ_HANDLED;
 577 }
 578
 579 static int enic_queue_wq_skb_cont(struct enic *enic, struct vnic_wq *wq,
 580                                   struct sk_buff *skb, unsigned int len_left,
 581                                   int loopback)
 582 {
 583         const skb_frag_t *frag;
 584         dma_addr_t dma_addr;
 585
 586         /* Queue additional data fragments */
 587         for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
 588                 len_left -= skb_frag_size(frag);
 589                 dma_addr = skb_frag_dma_map(&enic->pdev->dev, frag, 0,
 590                                             skb_frag_size(frag),
 591                                             DMA_TO_DEVICE);
 592                 if (unlikely(enic_dma_map_check(enic, dma_addr)))
 593                         return -ENOMEM;
 594                 enic_queue_wq_desc_cont(wq, skb, dma_addr, skb_frag_size(frag),
 595                                         (len_left == 0),        /* EOP? */
 596                                         loopback);
 597         }
 598
 599         return 0;
 600 }
 601
 602 static int enic_queue_wq_skb_vlan(struct enic *enic, struct vnic_wq *wq,
 603                                   struct sk_buff *skb, int vlan_tag_insert,
 604                                   unsigned int vlan_tag, int loopback)
 605 {
 606         unsigned int head_len = skb_headlen(skb);
 607         unsigned int len_left = skb->len - head_len;
 608         int eop = (len_left == 0);
 609         dma_addr_t dma_addr;
 610         int err = 0;
 611
 612         dma_addr = pci_map_single(enic->pdev, skb->data, head_len,
 613                                   PCI_DMA_TODEVICE);
 614         if (unlikely(enic_dma_map_check(enic, dma_addr)))
 615                 return -ENOMEM;
 616
 617         /* Queue the main skb fragment. The fragments are no larger
 618          * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
 619          * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
 620          * per fragment is queued.
 621          */
 622         enic_queue_wq_desc(wq, skb, dma_addr, head_len, vlan_tag_insert,
 623                            vlan_tag, eop, loopback);
 624
 625         if (!eop)
 626                 err = enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
 627
 628         return err;
 629 }
 630
 631 static int enic_queue_wq_skb_csum_l4(struct enic *enic, struct vnic_wq *wq,
 632                                      struct sk_buff *skb, int vlan_tag_insert,
 633                                      unsigned int vlan_tag, int loopback)
 634 {
 635         unsigned int head_len = skb_headlen(skb);
 636         unsigned int len_left = skb->len - head_len;
 637         unsigned int hdr_len = skb_checksum_start_offset(skb);
 638         unsigned int csum_offset = hdr_len + skb->csum_offset;
 639         int eop = (len_left == 0);
 640         dma_addr_t dma_addr;
 641         int err = 0;
 642
 643         dma_addr = pci_map_single(enic->pdev, skb->data, head_len,
 644                                   PCI_DMA_TODEVICE);
 645         if (unlikely(enic_dma_map_check(enic, dma_addr)))
 646                 return -ENOMEM;
 647
 648         /* Queue the main skb fragment. The fragments are no larger
 649          * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
 650          * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
 651          * per fragment is queued.
 652          */
 653         enic_queue_wq_desc_csum_l4(wq, skb, dma_addr, head_len, csum_offset,
 654                                    hdr_len, vlan_tag_insert, vlan_tag, eop,
 655                                    loopback);
 656
 657         if (!eop)
 658                 err = enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
 659
 660         return err;
 661 }
 662
 663 static void enic_preload_tcp_csum_encap(struct sk_buff *skb)
 664 {
 665         const struct ethhdr *eth = (struct ethhdr *)skb_inner_mac_header(skb);
 666
 667         switch (eth->h_proto) {
 668         case ntohs(ETH_P_IP):
 669                 inner_ip_hdr(skb)->check = 0;
 670                 inner_tcp_hdr(skb)->check =
 671                         ~csum_tcpudp_magic(inner_ip_hdr(skb)->saddr,
 672                                            inner_ip_hdr(skb)->daddr, 0,
 673                                            IPPROTO_TCP, 0);
 674                 break;
 675         case ntohs(ETH_P_IPV6):
 676                 inner_tcp_hdr(skb)->check =
 677                         ~csum_ipv6_magic(&inner_ipv6_hdr(skb)->saddr,
 678                                          &inner_ipv6_hdr(skb)->daddr, 0,
 679                                          IPPROTO_TCP, 0);
 680                 break;
 681         default:
 682                 WARN_ONCE(1, "Non ipv4/ipv6 inner pkt for encap offload");
 683                 break;
 684         }
 685 }
 686
 687 static void enic_preload_tcp_csum(struct sk_buff *skb)
 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
 704 static int enic_queue_wq_skb_tso(struct enic *enic, struct vnic_wq *wq,
 705                                  struct sk_buff *skb, unsigned int mss,
 706                                  int vlan_tag_insert, unsigned int vlan_tag,
 707                                  int loopback)
 708 {
 709         unsigned int frag_len_left = skb_headlen(skb);
 710         unsigned int len_left = skb->len - frag_len_left;
 711         int eop = (len_left == 0);
 712         unsigned int offset = 0;
 713         unsigned int hdr_len;
 714         dma_addr_t dma_addr;
 715         unsigned int len;
 716         skb_frag_t *frag;
 717
 718         if (skb->encapsulation) {
 719                 hdr_len = skb_inner_transport_header(skb) - skb->data;
 720                 hdr_len += inner_tcp_hdrlen(skb);
 721                 enic_preload_tcp_csum_encap(skb);
 722         } else {
 723                 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
 724                 enic_preload_tcp_csum(skb);
 725         }
 726
 727         /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
 728          * for the main skb fragment
 729          */
 730         while (frag_len_left) {
 731                 len = min(frag_len_left, (unsigned int)WQ_ENET_MAX_DESC_LEN);
 732                 dma_addr = pci_map_single(enic->pdev, skb->data + offset, len,
 733                                           PCI_DMA_TODEVICE);
 734                 if (unlikely(enic_dma_map_check(enic, dma_addr)))
 735                         return -ENOMEM;
 736                 enic_queue_wq_desc_tso(wq, skb, dma_addr, len, mss, hdr_len,
 737                                        vlan_tag_insert, vlan_tag,
 738                                        eop && (len == frag_len_left), loopback);
 739                 frag_len_left -= len;
 740                 offset += len;
 741         }
 742
 743         if (eop)
 744                 return 0;
 745
 746         /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
 747          * for additional data fragments
 748          */
 749         for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
 750                 len_left -= skb_frag_size(frag);
 751                 frag_len_left = skb_frag_size(frag);
 752                 offset = 0;
 753
 754                 while (frag_len_left) {
 755                         len = min(frag_len_left,
 756                                 (unsigned int)WQ_ENET_MAX_DESC_LEN);
 757                         dma_addr = skb_frag_dma_map(&enic->pdev->dev, frag,
 758                                                     offset, len,
 759                                                     DMA_TO_DEVICE);
 760                         if (unlikely(enic_dma_map_check(enic, dma_addr)))
 761                                 return -ENOMEM;
 762                         enic_queue_wq_desc_cont(wq, skb, dma_addr, len,
 763                                                 (len_left == 0) &&
 764                                                  (len == frag_len_left),/*EOP*/
 765                                                 loopback);
 766                         frag_len_left -= len;
 767                         offset += len;
 768                 }
 769         }
 770
 771         return 0;
 772 }
 773
 774 static inline int enic_queue_wq_skb_encap(struct enic *enic, struct vnic_wq *wq,
 775                                           struct sk_buff *skb,
 776                                           int vlan_tag_insert,
 777                                           unsigned int vlan_tag, int loopback)
 778 {
 779         unsigned int head_len = skb_headlen(skb);
 780         unsigned int len_left = skb->len - head_len;
 781         /* Hardware will overwrite the checksum fields, calculating from
 782          * scratch and ignoring the value placed by software.
 783          * Offload mode = 00
 784          * mss[2], mss[1], mss[0] bits are set
 785          */
 786         unsigned int mss_or_csum = 7;
 787         int eop = (len_left == 0);
 788         dma_addr_t dma_addr;
 789         int err = 0;
 790
 791         dma_addr = pci_map_single(enic->pdev, skb->data, head_len,
 792                                   PCI_DMA_TODEVICE);
 793         if (unlikely(enic_dma_map_check(enic, dma_addr)))
 794                 return -ENOMEM;
 795
 796         enic_queue_wq_desc_ex(wq, skb, dma_addr, head_len, mss_or_csum, 0,
 797                               vlan_tag_insert, vlan_tag,
 798                               WQ_ENET_OFFLOAD_MODE_CSUM, eop, 1 /* SOP */, eop,
 799                               loopback);
 800         if (!eop)
 801                 err = enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
 802
 803         return err;
 804 }
 805
 806 static inline void enic_queue_wq_skb(struct enic *enic,
 807         struct vnic_wq *wq, struct sk_buff *skb)
 808 {
 809         unsigned int mss = skb_shinfo(skb)->gso_size;
 810         unsigned int vlan_tag = 0;
 811         int vlan_tag_insert = 0;
 812         int loopback = 0;
 813         int err;
 814
 815         if (skb_vlan_tag_present(skb)) {
 816                 /* VLAN tag from trunking driver */
 817                 vlan_tag_insert = 1;
 818                 vlan_tag = skb_vlan_tag_get(skb);
 819         } else if (enic->loop_enable) {
 820                 vlan_tag = enic->loop_tag;
 821                 loopback = 1;
 822         }
 823
 824         if (mss)
 825                 err = enic_queue_wq_skb_tso(enic, wq, skb, mss,
 826                                             vlan_tag_insert, vlan_tag,
 827                                             loopback);
 828         else if (skb->encapsulation)
 829                 err = enic_queue_wq_skb_encap(enic, wq, skb, vlan_tag_insert,
 830                                               vlan_tag, loopback);
 831         else if (skb->ip_summed == CHECKSUM_PARTIAL)
 832                 err = enic_queue_wq_skb_csum_l4(enic, wq, skb, vlan_tag_insert,
 833                                                 vlan_tag, loopback);
 834         else
 835                 err = enic_queue_wq_skb_vlan(enic, wq, skb, vlan_tag_insert,
 836                                              vlan_tag, loopback);
 837         if (unlikely(err)) {
 838                 struct vnic_wq_buf *buf;
 839
 840                 buf = wq->to_use->prev;
 841                 /* while not EOP of previous pkt && queue not empty.
 842                  * For all non EOP bufs, os_buf is NULL.
 843                  */
 844                 while (!buf->os_buf && (buf->next != wq->to_clean)) {
 845                         enic_free_wq_buf(wq, buf);
 846                         wq->ring.desc_avail++;
 847                         buf = buf->prev;
 848                 }
 849                 wq->to_use = buf->next;
 850                 dev_kfree_skb(skb);
 851         }
 852 }
 853
 854 /* netif_tx_lock held, process context with BHs disabled, or BH */
 855 static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb,
 856         struct net_device *netdev)
 857 {
 858         struct enic *enic = netdev_priv(netdev);
 859         struct vnic_wq *wq;
 860         unsigned int txq_map;
 861         struct netdev_queue *txq;
 862
 863         if (skb->len <= 0) {
 864                 dev_kfree_skb_any(skb);
 865                 return NETDEV_TX_OK;
 866         }
 867
 868         txq_map = skb_get_queue_mapping(skb) % enic->wq_count;
 869         wq = &enic->wq[txq_map];
 870         txq = netdev_get_tx_queue(netdev, txq_map);
 871
 872         /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs,
 873          * which is very likely.  In the off chance it's going to take
 874          * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb.
 875          */
 876
 877         if (skb_shinfo(skb)->gso_size == 0 &&
 878             skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC &&
 879             skb_linearize(skb)) {
 880                 dev_kfree_skb_any(skb);
 881                 return NETDEV_TX_OK;
 882         }
 883
 884         spin_lock(&enic->wq_lock[txq_map]);
 885
 886         if (vnic_wq_desc_avail(wq) <
 887             skb_shinfo(skb)->nr_frags + ENIC_DESC_MAX_SPLITS) {
 888                 netif_tx_stop_queue(txq);
 889                 /* This is a hard error, log it */
 890                 netdev_err(netdev, "BUG! Tx ring full when queue awake!\n");
 891                 spin_unlock(&enic->wq_lock[txq_map]);
 892                 return NETDEV_TX_BUSY;
 893         }
 894
 895         enic_queue_wq_skb(enic, wq, skb);
 896
 897         if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS)
 898                 netif_tx_stop_queue(txq);
 899         skb_tx_timestamp(skb);
 900         if (!skb->xmit_more || netif_xmit_stopped(txq))
 901                 vnic_wq_doorbell(wq);
 902
 903         spin_unlock(&enic->wq_lock[txq_map]);
 904
 905         return NETDEV_TX_OK;
 906 }
 907
 908 /* dev_base_lock rwlock held, nominally process context */
 909 static void enic_get_stats(struct net_device *netdev,
 910                            struct rtnl_link_stats64 *net_stats)
 911 {
 912         struct enic *enic = netdev_priv(netdev);
 913         struct vnic_stats *stats;
 914         int err;
 915
 916         err = enic_dev_stats_dump(enic, &stats);
 917         /* return only when pci_zalloc_consistent fails in vnic_dev_stats_dump
 918          * For other failures, like devcmd failure, we return previously
 919          * recorded stats.
 920          */
 921         if (err == -ENOMEM)
 922                 return;
 923
 924         net_stats->tx_packets = stats->tx.tx_frames_ok;
 925         net_stats->tx_bytes = stats->tx.tx_bytes_ok;
 926         net_stats->tx_errors = stats->tx.tx_errors;
 927         net_stats->tx_dropped = stats->tx.tx_drops;
 928
 929         net_stats->rx_packets = stats->rx.rx_frames_ok;
 930         net_stats->rx_bytes = stats->rx.rx_bytes_ok;
 931         net_stats->rx_errors = stats->rx.rx_errors;
 932         net_stats->multicast = stats->rx.rx_multicast_frames_ok;
 933         net_stats->rx_over_errors = enic->rq_truncated_pkts;
 934         net_stats->rx_crc_errors = enic->rq_bad_fcs;
 935         net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop;
 936 }
 937
 938 static int enic_mc_sync(struct net_device *netdev, const u8 *mc_addr)
 939 {
 940         struct enic *enic = netdev_priv(netdev);
 941
 942         if (enic->mc_count == ENIC_MULTICAST_PERFECT_FILTERS) {
 943                 unsigned int mc_count = netdev_mc_count(netdev);
 944
 945                 netdev_warn(netdev, "Registering only %d out of %d multicast addresses\n",
 946                             ENIC_MULTICAST_PERFECT_FILTERS, mc_count);
 947
 948                 return -ENOSPC;
 949         }
 950
 951         enic_dev_add_addr(enic, mc_addr);
 952         enic->mc_count++;
 953
 954         return 0;
 955 }
 956
 957 static int enic_mc_unsync(struct net_device *netdev, const u8 *mc_addr)
 958 {
 959         struct enic *enic = netdev_priv(netdev);
 960
 961         enic_dev_del_addr(enic, mc_addr);
 962         enic->mc_count--;
 963
 964         return 0;
 965 }
 966
 967 static int enic_uc_sync(struct net_device *netdev, const u8 *uc_addr)
 968 {
 969         struct enic *enic = netdev_priv(netdev);
 970
 971         if (enic->uc_count == ENIC_UNICAST_PERFECT_FILTERS) {
 972                 unsigned int uc_count = netdev_uc_count(netdev);
 973
 974                 netdev_warn(netdev, "Registering only %d out of %d unicast addresses\n",
 975                             ENIC_UNICAST_PERFECT_FILTERS, uc_count);
 976
 977                 return -ENOSPC;
 978         }
 979
 980         enic_dev_add_addr(enic, uc_addr);
 981         enic->uc_count++;
 982
 983         return 0;
 984 }
 985
 986 static int enic_uc_unsync(struct net_device *netdev, const u8 *uc_addr)
 987 {
 988         struct enic *enic = netdev_priv(netdev);
 989
 990         enic_dev_del_addr(enic, uc_addr);
 991         enic->uc_count--;
 992
 993         return 0;
 994 }
 995
 996 void enic_reset_addr_lists(struct enic *enic)
 997 {
 998         struct net_device *netdev = enic->netdev;
 999
1000         __dev_uc_unsync(netdev, NULL);
1001         __dev_mc_unsync(netdev, NULL);
1002
1003         enic->mc_count = 0;
1004         enic->uc_count = 0;
1005         enic->flags = 0;
1006 }
1007
1008 static int enic_set_mac_addr(struct net_device *netdev, char *addr)
1009 {
1010         struct enic *enic = netdev_priv(netdev);
1011
1012         if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) {
1013                 if (!is_valid_ether_addr(addr) && !is_zero_ether_addr(addr))
1014                         return -EADDRNOTAVAIL;
1015         } else {
1016                 if (!is_valid_ether_addr(addr))
1017                         return -EADDRNOTAVAIL;
1018         }
1019
1020         memcpy(netdev->dev_addr, addr, netdev->addr_len);
1021
1022         return 0;
1023 }
1024
1025 static int enic_set_mac_address_dynamic(struct net_device *netdev, void *p)
1026 {
1027         struct enic *enic = netdev_priv(netdev);
1028         struct sockaddr *saddr = p;
1029         char *addr = saddr->sa_data;
1030         int err;
1031
1032         if (netif_running(enic->netdev)) {
1033                 err = enic_dev_del_station_addr(enic);
1034                 if (err)
1035                         return err;
1036         }
1037
1038         err = enic_set_mac_addr(netdev, addr);
1039         if (err)
1040                 return err;
1041
1042         if (netif_running(enic->netdev)) {
1043                 err = enic_dev_add_station_addr(enic);
1044                 if (err)
1045                         return err;
1046         }
1047
1048         return err;
1049 }
1050
1051 static int enic_set_mac_address(struct net_device *netdev, void *p)
1052 {
1053         struct sockaddr *saddr = p;
1054         char *addr = saddr->sa_data;
1055         struct enic *enic = netdev_priv(netdev);
1056         int err;
1057
1058         err = enic_dev_del_station_addr(enic);
1059         if (err)
1060                 return err;
1061
1062         err = enic_set_mac_addr(netdev, addr);
1063         if (err)
1064                 return err;
1065
1066         return enic_dev_add_station_addr(enic);
1067 }
1068
1069 /* netif_tx_lock held, BHs disabled */
1070 static void enic_set_rx_mode(struct net_device *netdev)
1071 {
1072         struct enic *enic = netdev_priv(netdev);
1073         int directed = 1;
1074         int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0;
1075         int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0;
1076         int promisc = (netdev->flags & IFF_PROMISC) ||
1077                 netdev_uc_count(netdev) > ENIC_UNICAST_PERFECT_FILTERS;
1078         int allmulti = (netdev->flags & IFF_ALLMULTI) ||
1079                 netdev_mc_count(netdev) > ENIC_MULTICAST_PERFECT_FILTERS;
1080         unsigned int flags = netdev->flags |
1081                 (allmulti ? IFF_ALLMULTI : 0) |
1082                 (promisc ? IFF_PROMISC : 0);
1083
1084         if (enic->flags != flags) {
1085                 enic->flags = flags;
1086                 enic_dev_packet_filter(enic, directed,
1087                         multicast, broadcast, promisc, allmulti);
1088         }
1089
1090         if (!promisc) {
1091                 __dev_uc_sync(netdev, enic_uc_sync, enic_uc_unsync);
1092                 if (!allmulti)
1093                         __dev_mc_sync(netdev, enic_mc_sync, enic_mc_unsync);
1094         }
1095 }
1096
1097 /* netif_tx_lock held, BHs disabled */
1098 static void enic_tx_timeout(struct net_device *netdev)
1099 {
1100         struct enic *enic = netdev_priv(netdev);
1101         schedule_work(&enic->tx_hang_reset);
1102 }
1103
1104 static int enic_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
1105 {
1106         struct enic *enic = netdev_priv(netdev);
1107         struct enic_port_profile *pp;
1108         int err;
1109
1110         ENIC_PP_BY_INDEX(enic, vf, pp, &err);
1111         if (err)
1112                 return err;
1113
1114         if (is_valid_ether_addr(mac) || is_zero_ether_addr(mac)) {
1115                 if (vf == PORT_SELF_VF) {
1116                         memcpy(pp->vf_mac, mac, ETH_ALEN);
1117                         return 0;
1118                 } else {
1119                         /*
1120                          * For sriov vf's set the mac in hw
1121                          */
1122                         ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic,
1123                                 vnic_dev_set_mac_addr, mac);
1124                         return enic_dev_status_to_errno(err);
1125                 }
1126         } else
1127                 return -EINVAL;
1128 }
1129
1130 static int enic_set_vf_port(struct net_device *netdev, int vf,
1131         struct nlattr *port[])
1132 {
1133         struct enic *enic = netdev_priv(netdev);
1134         struct enic_port_profile prev_pp;
1135         struct enic_port_profile *pp;
1136         int err = 0, restore_pp = 1;
1137
1138         ENIC_PP_BY_INDEX(enic, vf, pp, &err);
1139         if (err)
1140                 return err;
1141
1142         if (!port[IFLA_PORT_REQUEST])
1143                 return -EOPNOTSUPP;
1144
1145         memcpy(&prev_pp, pp, sizeof(*enic->pp));
1146         memset(pp, 0, sizeof(*enic->pp));
1147
1148         pp->set |= ENIC_SET_REQUEST;
1149         pp->request = nla_get_u8(port[IFLA_PORT_REQUEST]);
1150
1151         if (port[IFLA_PORT_PROFILE]) {
1152                 pp->set |= ENIC_SET_NAME;
1153                 memcpy(pp->name, nla_data(port[IFLA_PORT_PROFILE]),
1154                         PORT_PROFILE_MAX);
1155         }
1156
1157         if (port[IFLA_PORT_INSTANCE_UUID]) {
1158                 pp->set |= ENIC_SET_INSTANCE;
1159                 memcpy(pp->instance_uuid,
1160                         nla_data(port[IFLA_PORT_INSTANCE_UUID]), PORT_UUID_MAX);
1161         }
1162
1163         if (port[IFLA_PORT_HOST_UUID]) {
1164                 pp->set |= ENIC_SET_HOST;
1165                 memcpy(pp->host_uuid,
1166                         nla_data(port[IFLA_PORT_HOST_UUID]), PORT_UUID_MAX);
1167         }
1168
1169         if (vf == PORT_SELF_VF) {
1170                 /* Special case handling: mac came from IFLA_VF_MAC */
1171                 if (!is_zero_ether_addr(prev_pp.vf_mac))
1172                         memcpy(pp->mac_addr, prev_pp.vf_mac, ETH_ALEN);
1173
1174                 if (is_zero_ether_addr(netdev->dev_addr))
1175                         eth_hw_addr_random(netdev);
1176         } else {
1177                 /* SR-IOV VF: get mac from adapter */
1178                 ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic,
1179                         vnic_dev_get_mac_addr, pp->mac_addr);
1180                 if (err) {
1181                         netdev_err(netdev, "Error getting mac for vf %d\n", vf);
1182                         memcpy(pp, &prev_pp, sizeof(*pp));
1183                         return enic_dev_status_to_errno(err);
1184                 }
1185         }
1186
1187         err = enic_process_set_pp_request(enic, vf, &prev_pp, &restore_pp);
1188         if (err) {
1189                 if (restore_pp) {
1190                         /* Things are still the way they were: Implicit
1191                          * DISASSOCIATE failed
1192                          */
1193                         memcpy(pp, &prev_pp, sizeof(*pp));
1194                 } else {
1195                         memset(pp, 0, sizeof(*pp));
1196                         if (vf == PORT_SELF_VF)
1197                                 eth_zero_addr(netdev->dev_addr);
1198                 }
1199         } else {
1200                 /* Set flag to indicate that the port assoc/disassoc
1201                  * request has been sent out to fw
1202                  */
1203                 pp->set |= ENIC_PORT_REQUEST_APPLIED;
1204
1205                 /* If DISASSOCIATE, clean up all assigned/saved macaddresses */
1206                 if (pp->request == PORT_REQUEST_DISASSOCIATE) {
1207                         eth_zero_addr(pp->mac_addr);
1208                         if (vf == PORT_SELF_VF)
1209                                 eth_zero_addr(netdev->dev_addr);
1210                 }
1211         }
1212
1213         if (vf == PORT_SELF_VF)
1214                 eth_zero_addr(pp->vf_mac);
1215
1216         return err;
1217 }
1218
1219 static int enic_get_vf_port(struct net_device *netdev, int vf,
1220         struct sk_buff *skb)
1221 {
1222         struct enic *enic = netdev_priv(netdev);
1223         u16 response = PORT_PROFILE_RESPONSE_SUCCESS;
1224         struct enic_port_profile *pp;
1225         int err;
1226
1227         ENIC_PP_BY_INDEX(enic, vf, pp, &err);
1228         if (err)
1229                 return err;
1230
1231         if (!(pp->set & ENIC_PORT_REQUEST_APPLIED))
1232                 return -ENODATA;
1233
1234         err = enic_process_get_pp_request(enic, vf, pp->request, &response);
1235         if (err)
1236                 return err;
1237
1238         if (nla_put_u16(skb, IFLA_PORT_REQUEST, pp->request) ||
1239             nla_put_u16(skb, IFLA_PORT_RESPONSE, response) ||
1240             ((pp->set & ENIC_SET_NAME) &&
1241              nla_put(skb, IFLA_PORT_PROFILE, PORT_PROFILE_MAX, pp->name)) ||
1242             ((pp->set & ENIC_SET_INSTANCE) &&
1243              nla_put(skb, IFLA_PORT_INSTANCE_UUID, PORT_UUID_MAX,
1244                      pp->instance_uuid)) ||
1245             ((pp->set & ENIC_SET_HOST) &&
1246              nla_put(skb, IFLA_PORT_HOST_UUID, PORT_UUID_MAX, pp->host_uuid)))
1247                 goto nla_put_failure;
1248         return 0;
1249
1250 nla_put_failure:
1251         return -EMSGSIZE;
1252 }
1253
1254 static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
1255 {
1256         struct enic *enic = vnic_dev_priv(rq->vdev);
1257
1258         if (!buf->os_buf)
1259                 return;
1260
1261         pci_unmap_single(enic->pdev, buf->dma_addr,
1262                 buf->len, PCI_DMA_FROMDEVICE);
1263         dev_kfree_skb_any(buf->os_buf);
1264         buf->os_buf = NULL;
1265 }
1266
1267 static int enic_rq_alloc_buf(struct vnic_rq *rq)
1268 {
1269         struct enic *enic = vnic_dev_priv(rq->vdev);
1270         struct net_device *netdev = enic->netdev;
1271         struct sk_buff *skb;
1272         unsigned int len = netdev->mtu + VLAN_ETH_HLEN;
1273         unsigned int os_buf_index = 0;
1274         dma_addr_t dma_addr;
1275         struct vnic_rq_buf *buf = rq->to_use;
1276
1277         if (buf->os_buf) {
1278                 enic_queue_rq_desc(rq, buf->os_buf, os_buf_index, buf->dma_addr,
1279                                    buf->len);
1280
1281                 return 0;
1282         }
1283         skb = netdev_alloc_skb_ip_align(netdev, len);
1284         if (!skb)
1285                 return -ENOMEM;
1286
1287         dma_addr = pci_map_single(enic->pdev, skb->data, len,
1288                                   PCI_DMA_FROMDEVICE);
1289         if (unlikely(enic_dma_map_check(enic, dma_addr))) {
1290                 dev_kfree_skb(skb);
1291                 return -ENOMEM;
1292         }
1293
1294         enic_queue_rq_desc(rq, skb, os_buf_index,
1295                 dma_addr, len);
1296
1297         return 0;
1298 }
1299
1300 static void enic_intr_update_pkt_size(struct vnic_rx_bytes_counter *pkt_size,
1301                                       u32 pkt_len)
1302 {
1303         if (ENIC_LARGE_PKT_THRESHOLD <= pkt_len)
1304                 pkt_size->large_pkt_bytes_cnt += pkt_len;
1305         else
1306                 pkt_size->small_pkt_bytes_cnt += pkt_len;
1307 }
1308
1309 static bool enic_rxcopybreak(struct net_device *netdev, struct sk_buff **skb,
1310                              struct vnic_rq_buf *buf, u16 len)
1311 {
1312         struct enic *enic = netdev_priv(netdev);
1313         struct sk_buff *new_skb;
1314
1315         if (len > enic->rx_copybreak)
1316                 return false;
1317         new_skb = netdev_alloc_skb_ip_align(netdev, len);
1318         if (!new_skb)
1319                 return false;
1320         pci_dma_sync_single_for_cpu(enic->pdev, buf->dma_addr, len,
1321                                     DMA_FROM_DEVICE);
1322         memcpy(new_skb->data, (*skb)->data, len);
1323         *skb = new_skb;
1324
1325         return true;
1326 }
1327
1328 static void enic_rq_indicate_buf(struct vnic_rq *rq,
1329         struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
1330         int skipped, void *opaque)
1331 {
1332         struct enic *enic = vnic_dev_priv(rq->vdev);
1333         struct net_device *netdev = enic->netdev;
1334         struct sk_buff *skb;
1335         struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)];
1336
1337         u8 type, color, eop, sop, ingress_port, vlan_stripped;
1338         u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
1339         u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
1340         u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
1341         u8 packet_error;
1342         u16 q_number, completed_index, bytes_written, vlan_tci, checksum;
1343         u32 rss_hash;
1344         bool outer_csum_ok = true, encap = false;
1345
1346         if (skipped)
1347                 return;
1348
1349         skb = buf->os_buf;
1350
1351         cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
1352                 &type, &color, &q_number, &completed_index,
1353                 &ingress_port, &fcoe, &eop, &sop, &rss_type,
1354                 &csum_not_calc, &rss_hash, &bytes_written,
1355                 &packet_error, &vlan_stripped, &vlan_tci, &checksum,
1356                 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
1357                 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
1358                 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
1359                 &fcs_ok);
1360
1361         if (packet_error) {
1362
1363                 if (!fcs_ok) {
1364                         if (bytes_written > 0)
1365                                 enic->rq_bad_fcs++;
1366                         else if (bytes_written == 0)
1367                                 enic->rq_truncated_pkts++;
1368                 }
1369
1370                 pci_unmap_single(enic->pdev, buf->dma_addr, buf->len,
1371                                  PCI_DMA_FROMDEVICE);
1372                 dev_kfree_skb_any(skb);
1373                 buf->os_buf = NULL;
1374
1375                 return;
1376         }
1377
1378         if (eop && bytes_written > 0) {
1379
1380                 /* Good receive
1381                  */
1382
1383                 if (!enic_rxcopybreak(netdev, &skb, buf, bytes_written)) {
1384                         buf->os_buf = NULL;
1385                         pci_unmap_single(enic->pdev, buf->dma_addr, buf->len,
1386                                          PCI_DMA_FROMDEVICE);
1387                 }
1388                 prefetch(skb->data - NET_IP_ALIGN);
1389
1390                 skb_put(skb, bytes_written);
1391                 skb->protocol = eth_type_trans(skb, netdev);
1392                 skb_record_rx_queue(skb, q_number);
1393                 if ((netdev->features & NETIF_F_RXHASH) && rss_hash &&
1394                     (type == 3)) {
1395                         switch (rss_type) {
1396                         case CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv4:
1397                         case CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv6:
1398                         case CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv6_EX:
1399                                 skb_set_hash(skb, rss_hash, PKT_HASH_TYPE_L4);
1400                                 break;
1401                         case CQ_ENET_RQ_DESC_RSS_TYPE_IPv4:
1402                         case CQ_ENET_RQ_DESC_RSS_TYPE_IPv6:
1403                         case CQ_ENET_RQ_DESC_RSS_TYPE_IPv6_EX:
1404                                 skb_set_hash(skb, rss_hash, PKT_HASH_TYPE_L3);
1405                                 break;
1406                         }
1407                 }
1408                 if (enic->vxlan.vxlan_udp_port_number) {
1409                         switch (enic->vxlan.patch_level) {
1410                         case 0:
1411                                 if (fcoe) {
1412                                         encap = true;
1413                                         outer_csum_ok = fcoe_fc_crc_ok;
1414                                 }
1415                                 break;
1416                         case 2:
1417                                 if ((type == 7) &&
1418                                     (rss_hash & BIT(0))) {
1419                                         encap = true;
1420                                         outer_csum_ok = (rss_hash & BIT(1)) &&
1421                                                         (rss_hash & BIT(2));
1422                                 }
1423                                 break;
1424                         }
1425                 }
1426
1427                 /* Hardware does not provide whole packet checksum. It only
1428                  * provides pseudo checksum. Since hw validates the packet
1429                  * checksum but not provide us the checksum value. use
1430                  * CHECSUM_UNNECESSARY.
1431                  *
1432                  * In case of encap pkt tcp_udp_csum_ok/tcp_udp_csum_ok is
1433                  * inner csum_ok. outer_csum_ok is set by hw when outer udp
1434                  * csum is correct or is zero.
1435                  */
1436                 if ((netdev->features & NETIF_F_RXCSUM) && !csum_not_calc &&
1437                     tcp_udp_csum_ok && ipv4_csum_ok && outer_csum_ok) {
1438                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1439                         skb->csum_level = encap;
1440                 }
1441
1442                 if (vlan_stripped)
1443                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tci);
1444
1445                 skb_mark_napi_id(skb, &enic->napi[rq->index]);
1446                 if (!(netdev->features & NETIF_F_GRO))
1447                         netif_receive_skb(skb);
1448                 else
1449                         napi_gro_receive(&enic->napi[q_number], skb);
1450                 if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
1451                         enic_intr_update_pkt_size(&cq->pkt_size_counter,
1452                                                   bytes_written);
1453         } else {
1454
1455                 /* Buffer overflow
1456                  */
1457
1458                 pci_unmap_single(enic->pdev, buf->dma_addr, buf->len,
1459                                  PCI_DMA_FROMDEVICE);
1460                 dev_kfree_skb_any(skb);
1461                 buf->os_buf = NULL;
1462         }
1463 }
1464
1465 static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
1466         u8 type, u16 q_number, u16 completed_index, void *opaque)
1467 {
1468         struct enic *enic = vnic_dev_priv(vdev);
1469
1470         vnic_rq_service(&enic->rq[q_number], cq_desc,
1471                 completed_index, VNIC_RQ_RETURN_DESC,
1472                 enic_rq_indicate_buf, opaque);
1473
1474         return 0;
1475 }
1476
1477 static void enic_set_int_moderation(struct enic *enic, struct vnic_rq *rq)
1478 {
1479         unsigned int intr = enic_msix_rq_intr(enic, rq->index);
1480         struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)];
1481         u32 timer = cq->tobe_rx_coal_timeval;
1482
1483         if (cq->tobe_rx_coal_timeval != cq->cur_rx_coal_timeval) {
1484                 vnic_intr_coalescing_timer_set(&enic->intr[intr], timer);
1485                 cq->cur_rx_coal_timeval = cq->tobe_rx_coal_timeval;
1486         }
1487 }
1488
1489 static void enic_calc_int_moderation(struct enic *enic, struct vnic_rq *rq)
1490 {
1491         struct enic_rx_coal *rx_coal = &enic->rx_coalesce_setting;
1492         struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)];
1493         struct vnic_rx_bytes_counter *pkt_size_counter = &cq->pkt_size_counter;
1494         int index;
1495         u32 timer;
1496         u32 range_start;
1497         u32 traffic;
1498         u64 delta;
1499         ktime_t now = ktime_get();
1500
1501         delta = ktime_us_delta(now, cq->prev_ts);
1502         if (delta < ENIC_AIC_TS_BREAK)
1503                 return;
1504         cq->prev_ts = now;
1505
1506         traffic = pkt_size_counter->large_pkt_bytes_cnt +
1507                   pkt_size_counter->small_pkt_bytes_cnt;
1508         /* The table takes Mbps
1509          * traffic *= 8    => bits
1510          * traffic *= (10^6 / delta)    => bps
1511          * traffic /= 10^6     => Mbps
1512          *
1513          * Combining, traffic *= (8 / delta)
1514          */
1515
1516         traffic <<= 3;
1517         traffic = delta > UINT_MAX ? 0 : traffic / (u32)delta;
1518
1519         for (index = 0; index < ENIC_MAX_COALESCE_TIMERS; index++)
1520                 if (traffic < mod_table[index].rx_rate)
1521                         break;
1522         range_start = (pkt_size_counter->small_pkt_bytes_cnt >
1523                        pkt_size_counter->large_pkt_bytes_cnt << 1) ?
1524                       rx_coal->small_pkt_range_start :
1525                       rx_coal->large_pkt_range_start;
1526         timer = range_start + ((rx_coal->range_end - range_start) *
1527                                mod_table[index].range_percent / 100);
1528         /* Damping */
1529         cq->tobe_rx_coal_timeval = (timer + cq->tobe_rx_coal_timeval) >> 1;
1530
1531         pkt_size_counter->large_pkt_bytes_cnt = 0;
1532         pkt_size_counter->small_pkt_bytes_cnt = 0;
1533 }
1534
1535 static int enic_poll(struct napi_struct *napi, int budget)
1536 {
1537         struct net_device *netdev = napi->dev;
1538         struct enic *enic = netdev_priv(netdev);
1539         unsigned int cq_rq = enic_cq_rq(enic, 0);
1540         unsigned int cq_wq = enic_cq_wq(enic, 0);
1541         unsigned int intr = enic_legacy_io_intr();
1542         unsigned int rq_work_to_do = budget;
1543         unsigned int wq_work_to_do = ENIC_WQ_NAPI_BUDGET;
1544         unsigned int  work_done, rq_work_done = 0, wq_work_done;
1545         int err;
1546
1547         wq_work_done = vnic_cq_service(&enic->cq[cq_wq], wq_work_to_do,
1548                                        enic_wq_service, NULL);
1549
1550         if (budget > 0)
1551                 rq_work_done = vnic_cq_service(&enic->cq[cq_rq],
1552                         rq_work_to_do, enic_rq_service, NULL);
1553
1554         /* Accumulate intr event credits for this polling
1555          * cycle.  An intr event is the completion of a
1556          * a WQ or RQ packet.
1557          */
1558
1559         work_done = rq_work_done + wq_work_done;
1560
1561         if (work_done > 0)
1562                 vnic_intr_return_credits(&enic->intr[intr],
1563                         work_done,
1564                         0 /* don't unmask intr */,
1565                         0 /* don't reset intr timer */);
1566
1567         err = vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1568
1569         /* Buffer allocation failed. Stay in polling
1570          * mode so we can try to fill the ring again.
1571          */
1572
1573         if (err)
1574                 rq_work_done = rq_work_to_do;
1575         if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
1576                 /* Call the function which refreshes the intr coalescing timer
1577                  * value based on the traffic.
1578                  */
1579                 enic_calc_int_moderation(enic, &enic->rq[0]);
1580
1581         if ((rq_work_done < budget) && napi_complete_done(napi, rq_work_done)) {
1582
1583                 /* Some work done, but not enough to stay in polling,
1584                  * exit polling
1585                  */
1586
1587                 if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
1588                         enic_set_int_moderation(enic, &enic->rq[0]);
1589                 vnic_intr_unmask(&enic->intr[intr]);
1590         }
1591
1592         return rq_work_done;
1593 }
1594
1595 #ifdef CONFIG_RFS_ACCEL
1596 static void enic_free_rx_cpu_rmap(struct enic *enic)
1597 {
1598         free_irq_cpu_rmap(enic->netdev->rx_cpu_rmap);
1599         enic->netdev->rx_cpu_rmap = NULL;
1600 }
1601
1602 static void enic_set_rx_cpu_rmap(struct enic *enic)
1603 {
1604         int i, res;
1605
1606         if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) {
1607                 enic->netdev->rx_cpu_rmap = alloc_irq_cpu_rmap(enic->rq_count);
1608                 if (unlikely(!enic->netdev->rx_cpu_rmap))
1609                         return;
1610                 for (i = 0; i < enic->rq_count; i++) {
1611                         res = irq_cpu_rmap_add(enic->netdev->rx_cpu_rmap,
1612                                                enic->msix_entry[i].vector);
1613                         if (unlikely(res)) {
1614                                 enic_free_rx_cpu_rmap(enic);
1615                                 return;
1616                         }
1617                 }
1618         }
1619 }
1620
1621 #else
1622
1623 static void enic_free_rx_cpu_rmap(struct enic *enic)
1624 {
1625 }
1626
1627 static void enic_set_rx_cpu_rmap(struct enic *enic)
1628 {
1629 }
1630
1631 #endif /* CONFIG_RFS_ACCEL */
1632
1633 static int enic_poll_msix_wq(struct napi_struct *napi, int budget)
1634 {
1635         struct net_device *netdev = napi->dev;
1636         struct enic *enic = netdev_priv(netdev);
1637         unsigned int wq_index = (napi - &enic->napi[0]) - enic->rq_count;
1638         struct vnic_wq *wq = &enic->wq[wq_index];
1639         unsigned int cq;
1640         unsigned int intr;
1641         unsigned int wq_work_to_do = ENIC_WQ_NAPI_BUDGET;
1642         unsigned int wq_work_done;
1643         unsigned int wq_irq;
1644
1645         wq_irq = wq->index;
1646         cq = enic_cq_wq(enic, wq_irq);
1647         intr = enic_msix_wq_intr(enic, wq_irq);
1648         wq_work_done = vnic_cq_service(&enic->cq[cq], wq_work_to_do,
1649                                        enic_wq_service, NULL);
1650
1651         vnic_intr_return_credits(&enic->intr[intr], wq_work_done,
1652                                  0 /* don't unmask intr */,
1653                                  1 /* reset intr timer */);
1654         if (!wq_work_done) {
1655                 napi_complete(napi);
1656                 vnic_intr_unmask(&enic->intr[intr]);
1657                 return 0;
1658         }
1659
1660         return budget;
1661 }
1662
1663 static int enic_poll_msix_rq(struct napi_struct *napi, int budget)
1664 {
1665         struct net_device *netdev = napi->dev;
1666         struct enic *enic = netdev_priv(netdev);
1667         unsigned int rq = (napi - &enic->napi[0]);
1668         unsigned int cq = enic_cq_rq(enic, rq);
1669         unsigned int intr = enic_msix_rq_intr(enic, rq);
1670         unsigned int work_to_do = budget;
1671         unsigned int work_done = 0;
1672         int err;
1673
1674         /* Service RQ
1675          */
1676
1677         if (budget > 0)
1678                 work_done = vnic_cq_service(&enic->cq[cq],
1679                         work_to_do, enic_rq_service, NULL);
1680
1681         /* Return intr event credits for this polling
1682          * cycle.  An intr event is the completion of a
1683          * RQ packet.
1684          */
1685
1686         if (work_done > 0)
1687                 vnic_intr_return_credits(&enic->intr[intr],
1688                         work_done,
1689                         0 /* don't unmask intr */,
1690                         0 /* don't reset intr timer */);
1691
1692         err = vnic_rq_fill(&enic->rq[rq], enic_rq_alloc_buf);
1693
1694         /* Buffer allocation failed. Stay in polling mode
1695          * so we can try to fill the ring again.
1696          */
1697
1698         if (err)
1699                 work_done = work_to_do;
1700         if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
1701                 /* Call the function which refreshes the intr coalescing timer
1702                  * value based on the traffic.
1703                  */
1704                 enic_calc_int_moderation(enic, &enic->rq[rq]);
1705
1706         if ((work_done < budget) && napi_complete_done(napi, work_done)) {
1707
1708                 /* Some work done, but not enough to stay in polling,
1709                  * exit polling
1710                  */
1711
1712                 if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
1713                         enic_set_int_moderation(enic, &enic->rq[rq]);
1714                 vnic_intr_unmask(&enic->intr[intr]);
1715         }
1716
1717         return work_done;
1718 }
1719
1720 static void enic_notify_timer(struct timer_list *t)
1721 {
1722         struct enic *enic = from_timer(enic, t, notify_timer);
1723
1724         enic_notify_check(enic);
1725
1726         mod_timer(&enic->notify_timer,
1727                 round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD));
1728 }
1729
1730 static void enic_free_intr(struct enic *enic)
1731 {
1732         struct net_device *netdev = enic->netdev;
1733         unsigned int i;
1734
1735         enic_free_rx_cpu_rmap(enic);
1736         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1737         case VNIC_DEV_INTR_MODE_INTX:
1738                 free_irq(enic->pdev->irq, netdev);
1739                 break;
1740         case VNIC_DEV_INTR_MODE_MSI:
1741                 free_irq(enic->pdev->irq, enic);
1742                 break;
1743         case VNIC_DEV_INTR_MODE_MSIX:
1744                 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1745                         if (enic->msix[i].requested)
1746                                 free_irq(enic->msix_entry[i].vector,
1747                                         enic->msix[i].devid);
1748                 break;
1749         default:
1750                 break;
1751         }
1752 }
1753
1754 static int enic_request_intr(struct enic *enic)
1755 {
1756         struct net_device *netdev = enic->netdev;
1757         unsigned int i, intr;
1758         int err = 0;
1759
1760         enic_set_rx_cpu_rmap(enic);
1761         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1762
1763         case VNIC_DEV_INTR_MODE_INTX:
1764
1765                 err = request_irq(enic->pdev->irq, enic_isr_legacy,
1766                         IRQF_SHARED, netdev->name, netdev);
1767                 break;
1768
1769         case VNIC_DEV_INTR_MODE_MSI:
1770
1771                 err = request_irq(enic->pdev->irq, enic_isr_msi,
1772                         0, netdev->name, enic);
1773                 break;
1774
1775         case VNIC_DEV_INTR_MODE_MSIX:
1776
1777                 for (i = 0; i < enic->rq_count; i++) {
1778                         intr = enic_msix_rq_intr(enic, i);
1779                         snprintf(enic->msix[intr].devname,
1780                                 sizeof(enic->msix[intr].devname),
1781                                 "%s-rx-%u", netdev->name, i);
1782                         enic->msix[intr].isr = enic_isr_msix;
1783                         enic->msix[intr].devid = &enic->napi[i];
1784                 }
1785
1786                 for (i = 0; i < enic->wq_count; i++) {
1787                         int wq = enic_cq_wq(enic, i);
1788
1789                         intr = enic_msix_wq_intr(enic, i);
1790                         snprintf(enic->msix[intr].devname,
1791                                 sizeof(enic->msix[intr].devname),
1792                                 "%s-tx-%u", netdev->name, i);
1793                         enic->msix[intr].isr = enic_isr_msix;
1794                         enic->msix[intr].devid = &enic->napi[wq];
1795                 }
1796
1797                 intr = enic_msix_err_intr(enic);
1798                 snprintf(enic->msix[intr].devname,
1799                         sizeof(enic->msix[intr].devname),
1800                         "%s-err", netdev->name);
1801                 enic->msix[intr].isr = enic_isr_msix_err;
1802                 enic->msix[intr].devid = enic;
1803
1804                 intr = enic_msix_notify_intr(enic);
1805                 snprintf(enic->msix[intr].devname,
1806                         sizeof(enic->msix[intr].devname),
1807                         "%s-notify", netdev->name);
1808                 enic->msix[intr].isr = enic_isr_msix_notify;
1809                 enic->msix[intr].devid = enic;
1810
1811                 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1812                         enic->msix[i].requested = 0;
1813
1814                 for (i = 0; i < enic->intr_count; i++) {
1815                         err = request_irq(enic->msix_entry[i].vector,
1816                                 enic->msix[i].isr, 0,
1817                                 enic->msix[i].devname,
1818                                 enic->msix[i].devid);
1819                         if (err) {
1820                                 enic_free_intr(enic);
1821                                 break;
1822                         }
1823                         enic->msix[i].requested = 1;
1824                 }
1825
1826                 break;
1827
1828         default:
1829                 break;
1830         }
1831
1832         return err;
1833 }
1834
1835 static void enic_synchronize_irqs(struct enic *enic)
1836 {
1837         unsigned int i;
1838
1839         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1840         case VNIC_DEV_INTR_MODE_INTX:
1841         case VNIC_DEV_INTR_MODE_MSI:
1842                 synchronize_irq(enic->pdev->irq);
1843                 break;
1844         case VNIC_DEV_INTR_MODE_MSIX:
1845                 for (i = 0; i < enic->intr_count; i++)
1846                         synchronize_irq(enic->msix_entry[i].vector);
1847                 break;
1848         default:
1849                 break;
1850         }
1851 }
1852
1853 static void enic_set_rx_coal_setting(struct enic *enic)
1854 {
1855         unsigned int speed;
1856         int index = -1;
1857         struct enic_rx_coal *rx_coal = &enic->rx_coalesce_setting;
1858
1859         /* 1. Read the link speed from fw
1860          * 2. Pick the default range for the speed
1861          * 3. Update it in enic->rx_coalesce_setting
1862          */
1863         speed = vnic_dev_port_speed(enic->vdev);
1864         if (ENIC_LINK_SPEED_10G < speed)
1865                 index = ENIC_LINK_40G_INDEX;
1866         else if (ENIC_LINK_SPEED_4G < speed)
1867                 index = ENIC_LINK_10G_INDEX;
1868         else
1869                 index = ENIC_LINK_4G_INDEX;
1870
1871         rx_coal->small_pkt_range_start = mod_range[index].small_pkt_range_start;
1872         rx_coal->large_pkt_range_start = mod_range[index].large_pkt_range_start;
1873         rx_coal->range_end = ENIC_RX_COALESCE_RANGE_END;
1874
1875         /* Start with the value provided by UCSM */
1876         for (index = 0; index < enic->rq_count; index++)
1877                 enic->cq[index].cur_rx_coal_timeval =
1878                                 enic->config.intr_timer_usec;
1879
1880         rx_coal->use_adaptive_rx_coalesce = 1;
1881 }
1882
1883 static int enic_dev_notify_set(struct enic *enic)
1884 {
1885         int err;
1886
1887         spin_lock_bh(&enic->devcmd_lock);
1888         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1889         case VNIC_DEV_INTR_MODE_INTX:
1890                 err = vnic_dev_notify_set(enic->vdev,
1891                         enic_legacy_notify_intr());
1892                 break;
1893         case VNIC_DEV_INTR_MODE_MSIX:
1894                 err = vnic_dev_notify_set(enic->vdev,
1895                         enic_msix_notify_intr(enic));
1896                 break;
1897         default:
1898                 err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */);
1899                 break;
1900         }
1901         spin_unlock_bh(&enic->devcmd_lock);
1902
1903         return err;
1904 }
1905
1906 static void enic_notify_timer_start(struct enic *enic)
1907 {
1908         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1909         case VNIC_DEV_INTR_MODE_MSI:
1910                 mod_timer(&enic->notify_timer, jiffies);
1911                 break;
1912         default:
1913                 /* Using intr for notification for INTx/MSI-X */
1914                 break;
1915         }
1916 }
1917
1918 /* rtnl lock is held, process context */
1919 static int enic_open(struct net_device *netdev)
1920 {
1921         struct enic *enic = netdev_priv(netdev);
1922         unsigned int i;
1923         int err, ret;
1924
1925         err = enic_request_intr(enic);
1926         if (err) {
1927                 netdev_err(netdev, "Unable to request irq.\n");
1928                 return err;
1929         }
1930         enic_init_affinity_hint(enic);
1931         enic_set_affinity_hint(enic);
1932
1933         err = enic_dev_notify_set(enic);
1934         if (err) {
1935                 netdev_err(netdev,
1936                         "Failed to alloc notify buffer, aborting.\n");
1937                 goto err_out_free_intr;
1938         }
1939
1940         for (i = 0; i < enic->rq_count; i++) {
1941                 /* enable rq before updating rq desc */
1942                 vnic_rq_enable(&enic->rq[i]);
1943                 vnic_rq_fill(&enic->rq[i], enic_rq_alloc_buf);
1944                 /* Need at least one buffer on ring to get going */
1945                 if (vnic_rq_desc_used(&enic->rq[i]) == 0) {
1946                         netdev_err(netdev, "Unable to alloc receive buffers\n");
1947                         err = -ENOMEM;
1948                         goto err_out_free_rq;
1949                 }
1950         }
1951
1952         for (i = 0; i < enic->wq_count; i++)
1953                 vnic_wq_enable(&enic->wq[i]);
1954
1955         if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic))
1956                 enic_dev_add_station_addr(enic);
1957
1958         enic_set_rx_mode(netdev);
1959
1960         netif_tx_wake_all_queues(netdev);
1961
1962         for (i = 0; i < enic->rq_count; i++)
1963                 napi_enable(&enic->napi[i]);
1964
1965         if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX)
1966                 for (i = 0; i < enic->wq_count; i++)
1967                         napi_enable(&enic->napi[enic_cq_wq(enic, i)]);
1968         enic_dev_enable(enic);
1969
1970         for (i = 0; i < enic->intr_count; i++)
1971                 vnic_intr_unmask(&enic->intr[i]);
1972
1973         enic_notify_timer_start(enic);
1974         enic_rfs_timer_start(enic);
1975
1976         return 0;
1977
1978 err_out_free_rq:
1979         for (i = 0; i < enic->rq_count; i++) {
1980                 ret = vnic_rq_disable(&enic->rq[i]);
1981                 if (!ret)
1982                         vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
1983         }
1984         enic_dev_notify_unset(enic);
1985 err_out_free_intr:
1986         enic_unset_affinity_hint(enic);
1987         enic_free_intr(enic);
1988
1989         return err;
1990 }
1991
1992 /* rtnl lock is held, process context */
1993 static int enic_stop(struct net_device *netdev)
1994 {
1995         struct enic *enic = netdev_priv(netdev);
1996         unsigned int i;
1997         int err;
1998
1999         for (i = 0; i < enic->intr_count; i++) {
2000                 vnic_intr_mask(&enic->intr[i]);
2001                 (void)vnic_intr_masked(&enic->intr[i]); /* flush write */
2002         }
2003
2004         enic_synchronize_irqs(enic);
2005
2006         del_timer_sync(&enic->notify_timer);
2007         enic_rfs_flw_tbl_free(enic);
2008
2009         enic_dev_disable(enic);
2010
2011         for (i = 0; i < enic->rq_count; i++)
2012                 napi_disable(&enic->napi[i]);
2013
2014         netif_carrier_off(netdev);
2015         netif_tx_disable(netdev);
2016         if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX)
2017                 for (i = 0; i < enic->wq_count; i++)
2018                         napi_disable(&enic->napi[enic_cq_wq(enic, i)]);
2019
2020         if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic))
2021                 enic_dev_del_station_addr(enic);
2022
2023         for (i = 0; i < enic->wq_count; i++) {
2024                 err = vnic_wq_disable(&enic->wq[i]);
2025                 if (err)
2026                         return err;
2027         }
2028         for (i = 0; i < enic->rq_count; i++) {
2029                 err = vnic_rq_disable(&enic->rq[i]);
2030                 if (err)
2031                         return err;
2032         }
2033
2034         enic_dev_notify_unset(enic);
2035         enic_unset_affinity_hint(enic);
2036         enic_free_intr(enic);
2037
2038         for (i = 0; i < enic->wq_count; i++)
2039                 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
2040         for (i = 0; i < enic->rq_count; i++)
2041                 vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
2042         for (i = 0; i < enic->cq_count; i++)
2043                 vnic_cq_clean(&enic->cq[i]);
2044         for (i = 0; i < enic->intr_count; i++)
2045                 vnic_intr_clean(&enic->intr[i]);
2046
2047         return 0;
2048 }
2049
2050 static int enic_change_mtu(struct net_device *netdev, int new_mtu)
2051 {
2052         struct enic *enic = netdev_priv(netdev);
2053         int running = netif_running(netdev);
2054
2055         if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic))
2056                 return -EOPNOTSUPP;
2057
2058         if (running)
2059                 enic_stop(netdev);
2060
2061         netdev->mtu = new_mtu;
2062
2063         if (netdev->mtu > enic->port_mtu)
2064                 netdev_warn(netdev,
2065                         "interface MTU (%d) set higher than port MTU (%d)\n",
2066                         netdev->mtu, enic->port_mtu);
2067
2068         if (running)
2069                 enic_open(netdev);
2070
2071         return 0;
2072 }
2073
2074 static void enic_change_mtu_work(struct work_struct *work)
2075 {
2076         struct enic *enic = container_of(work, struct enic, change_mtu_work);
2077         struct net_device *netdev = enic->netdev;
2078         int new_mtu = vnic_dev_mtu(enic->vdev);
2079         int err;
2080         unsigned int i;
2081
2082         new_mtu = max_t(int, ENIC_MIN_MTU, min_t(int, ENIC_MAX_MTU, new_mtu));
2083
2084         rtnl_lock();
2085
2086         /* Stop RQ */
2087         del_timer_sync(&enic->notify_timer);
2088
2089         for (i = 0; i < enic->rq_count; i++)
2090                 napi_disable(&enic->napi[i]);
2091
2092         vnic_intr_mask(&enic->intr[0]);
2093         enic_synchronize_irqs(enic);
2094         err = vnic_rq_disable(&enic->rq[0]);
2095         if (err) {
2096                 rtnl_unlock();
2097                 netdev_err(netdev, "Unable to disable RQ.\n");
2098                 return;
2099         }
2100         vnic_rq_clean(&enic->rq[0], enic_free_rq_buf);
2101         vnic_cq_clean(&enic->cq[0]);
2102         vnic_intr_clean(&enic->intr[0]);
2103
2104         /* Fill RQ with new_mtu-sized buffers */
2105         netdev->mtu = new_mtu;
2106         vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
2107         /* Need at least one buffer on ring to get going */
2108         if (vnic_rq_desc_used(&enic->rq[0]) == 0) {
2109                 rtnl_unlock();
2110                 netdev_err(netdev, "Unable to alloc receive buffers.\n");
2111                 return;
2112         }
2113
2114         /* Start RQ */
2115         vnic_rq_enable(&enic->rq[0]);
2116         napi_enable(&enic->napi[0]);
2117         vnic_intr_unmask(&enic->intr[0]);
2118         enic_notify_timer_start(enic);
2119
2120         rtnl_unlock();
2121
2122         netdev_info(netdev, "interface MTU set as %d\n", netdev->mtu);
2123 }
2124
2125 #ifdef CONFIG_NET_POLL_CONTROLLER
2126 static void enic_poll_controller(struct net_device *netdev)
2127 {
2128         struct enic *enic = netdev_priv(netdev);
2129         struct vnic_dev *vdev = enic->vdev;
2130         unsigned int i, intr;
2131
2132         switch (vnic_dev_get_intr_mode(vdev)) {
2133         case VNIC_DEV_INTR_MODE_MSIX:
2134                 for (i = 0; i < enic->rq_count; i++) {
2135                         intr = enic_msix_rq_intr(enic, i);
2136                         enic_isr_msix(enic->msix_entry[intr].vector,
2137                                       &enic->napi[i]);
2138                 }
2139
2140                 for (i = 0; i < enic->wq_count; i++) {
2141                         intr = enic_msix_wq_intr(enic, i);
2142                         enic_isr_msix(enic->msix_entry[intr].vector,
2143                                       &enic->napi[enic_cq_wq(enic, i)]);
2144                 }
2145
2146                 break;
2147         case VNIC_DEV_INTR_MODE_MSI:
2148                 enic_isr_msi(enic->pdev->irq, enic);
2149                 break;
2150         case VNIC_DEV_INTR_MODE_INTX:
2151                 enic_isr_legacy(enic->pdev->irq, netdev);
2152                 break;
2153         default:
2154                 break;
2155         }
2156 }
2157 #endif
2158
2159 static int enic_dev_wait(struct vnic_dev *vdev,
2160         int (*start)(struct vnic_dev *, int),
2161         int (*finished)(struct vnic_dev *, int *),
2162         int arg)
2163 {
2164         unsigned long time;
2165         int done;
2166         int err;
2167
2168         BUG_ON(in_interrupt());
2169
2170         err = start(vdev, arg);
2171         if (err)
2172                 return err;
2173
2174         /* Wait for func to complete...2 seconds max
2175          */
2176
2177         time = jiffies + (HZ * 2);
2178         do {
2179
2180                 err = finished(vdev, &done);
2181                 if (err)
2182                         return err;
2183
2184                 if (done)
2185                         return 0;
2186
2187                 schedule_timeout_uninterruptible(HZ / 10);
2188
2189         } while (time_after(time, jiffies));
2190
2191         return -ETIMEDOUT;
2192 }
2193
2194 static int enic_dev_open(struct enic *enic)
2195 {
2196         int err;
2197         u32 flags = CMD_OPENF_IG_DESCCACHE;
2198
2199         err = enic_dev_wait(enic->vdev, vnic_dev_open,
2200                 vnic_dev_open_done, flags);
2201         if (err)
2202                 dev_err(enic_get_dev(enic), "vNIC device open failed, err %d\n",
2203                         err);
2204
2205         return err;
2206 }
2207
2208 static int enic_dev_soft_reset(struct enic *enic)
2209 {
2210         int err;
2211
2212         err = enic_dev_wait(enic->vdev, vnic_dev_soft_reset,
2213                             vnic_dev_soft_reset_done, 0);
2214         if (err)
2215                 netdev_err(enic->netdev, "vNIC soft reset failed, err %d\n",
2216                            err);
2217
2218         return err;
2219 }
2220
2221 static int enic_dev_hang_reset(struct enic *enic)
2222 {
2223         int err;
2224
2225         err = enic_dev_wait(enic->vdev, vnic_dev_hang_reset,
2226                 vnic_dev_hang_reset_done, 0);
2227         if (err)
2228                 netdev_err(enic->netdev, "vNIC hang reset failed, err %d\n",
2229                         err);
2230
2231         return err;
2232 }
2233
2234 int __enic_set_rsskey(struct enic *enic)
2235 {
2236         union vnic_rss_key *rss_key_buf_va;
2237         dma_addr_t rss_key_buf_pa;
2238         int i, kidx, bidx, err;
2239
2240         rss_key_buf_va = pci_zalloc_consistent(enic->pdev,
2241                                                sizeof(union vnic_rss_key),
2242                                                &rss_key_buf_pa);
2243         if (!rss_key_buf_va)
2244                 return -ENOMEM;
2245
2246         for (i = 0; i < ENIC_RSS_LEN; i++) {
2247                 kidx = i / ENIC_RSS_BYTES_PER_KEY;
2248                 bidx = i % ENIC_RSS_BYTES_PER_KEY;
2249                 rss_key_buf_va->key[kidx].b[bidx] = enic->rss_key[i];
2250         }
2251         spin_lock_bh(&enic->devcmd_lock);
2252         err = enic_set_rss_key(enic,
2253                 rss_key_buf_pa,
2254                 sizeof(union vnic_rss_key));
2255         spin_unlock_bh(&enic->devcmd_lock);
2256
2257         pci_free_consistent(enic->pdev, sizeof(union vnic_rss_key),
2258                 rss_key_buf_va, rss_key_buf_pa);
2259
2260         return err;
2261 }
2262
2263 static int enic_set_rsskey(struct enic *enic)
2264 {
2265         netdev_rss_key_fill(enic->rss_key, ENIC_RSS_LEN);
2266
2267         return __enic_set_rsskey(enic);
2268 }
2269
2270 static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits)
2271 {
2272         dma_addr_t rss_cpu_buf_pa;
2273         union vnic_rss_cpu *rss_cpu_buf_va = NULL;
2274         unsigned int i;
2275         int err;
2276
2277         rss_cpu_buf_va = pci_alloc_consistent(enic->pdev,
2278                 sizeof(union vnic_rss_cpu), &rss_cpu_buf_pa);
2279         if (!rss_cpu_buf_va)
2280                 return -ENOMEM;
2281
2282         for (i = 0; i < (1 << rss_hash_bits); i++)
2283                 (*rss_cpu_buf_va).cpu[i/4].b[i%4] = i % enic->rq_count;
2284
2285         spin_lock_bh(&enic->devcmd_lock);
2286         err = enic_set_rss_cpu(enic,
2287                 rss_cpu_buf_pa,
2288                 sizeof(union vnic_rss_cpu));
2289         spin_unlock_bh(&enic->devcmd_lock);
2290
2291         pci_free_consistent(enic->pdev, sizeof(union vnic_rss_cpu),
2292                 rss_cpu_buf_va, rss_cpu_buf_pa);
2293
2294         return err;
2295 }
2296
2297 static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu,
2298         u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable)
2299 {
2300         const u8 tso_ipid_split_en = 0;
2301         const u8 ig_vlan_strip_en = 1;
2302         int err;
2303
2304         /* Enable VLAN tag stripping.
2305         */
2306
2307         spin_lock_bh(&enic->devcmd_lock);
2308         err = enic_set_nic_cfg(enic,
2309                 rss_default_cpu, rss_hash_type,
2310                 rss_hash_bits, rss_base_cpu,
2311                 rss_enable, tso_ipid_split_en,
2312                 ig_vlan_strip_en);
2313         spin_unlock_bh(&enic->devcmd_lock);
2314
2315         return err;
2316 }
2317
2318 static int enic_set_rss_nic_cfg(struct enic *enic)
2319 {
2320         struct device *dev = enic_get_dev(enic);
2321         const u8 rss_default_cpu = 0;
2322         const u8 rss_hash_bits = 7;
2323         const u8 rss_base_cpu = 0;
2324         u8 rss_hash_type;
2325         int res;
2326         u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1);
2327
2328         spin_lock_bh(&enic->devcmd_lock);
2329         res = vnic_dev_capable_rss_hash_type(enic->vdev, &rss_hash_type);
2330         spin_unlock_bh(&enic->devcmd_lock);
2331         if (res) {
2332                 /* defaults for old adapters
2333                  */
2334                 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4      |
2335                                 NIC_CFG_RSS_HASH_TYPE_TCP_IPV4  |
2336                                 NIC_CFG_RSS_HASH_TYPE_IPV6      |
2337                                 NIC_CFG_RSS_HASH_TYPE_TCP_IPV6;
2338         }
2339
2340         if (rss_enable) {
2341                 if (!enic_set_rsskey(enic)) {
2342                         if (enic_set_rsscpu(enic, rss_hash_bits)) {
2343                                 rss_enable = 0;
2344                                 dev_warn(dev, "RSS disabled, "
2345                                         "Failed to set RSS cpu indirection table.");
2346                         }
2347                 } else {
2348                         rss_enable = 0;
2349                         dev_warn(dev, "RSS disabled, Failed to set RSS key.\n");
2350                 }
2351         }
2352
2353         return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type,
2354                 rss_hash_bits, rss_base_cpu, rss_enable);
2355 }
2356
2357 static void enic_reset(struct work_struct *work)
2358 {
2359         struct enic *enic = container_of(work, struct enic, reset);
2360
2361         if (!netif_running(enic->netdev))
2362                 return;
2363
2364         rtnl_lock();
2365
2366         spin_lock(&enic->enic_api_lock);
2367         enic_stop(enic->netdev);
2368         enic_dev_soft_reset(enic);
2369         enic_reset_addr_lists(enic);
2370         enic_init_vnic_resources(enic);
2371         enic_set_rss_nic_cfg(enic);
2372         enic_dev_set_ig_vlan_rewrite_mode(enic);
2373         enic_open(enic->netdev);
2374         spin_unlock(&enic->enic_api_lock);
2375         call_netdevice_notifiers(NETDEV_REBOOT, enic->netdev);
2376
2377         rtnl_unlock();
2378 }
2379
2380 static void enic_tx_hang_reset(struct work_struct *work)
2381 {
2382         struct enic *enic = container_of(work, struct enic, tx_hang_reset);
2383
2384         rtnl_lock();
2385
2386         spin_lock(&enic->enic_api_lock);
2387         enic_dev_hang_notify(enic);
2388         enic_stop(enic->netdev);
2389         enic_dev_hang_reset(enic);
2390         enic_reset_addr_lists(enic);
2391         enic_init_vnic_resources(enic);
2392         enic_set_rss_nic_cfg(enic);
2393         enic_dev_set_ig_vlan_rewrite_mode(enic);
2394         enic_open(enic->netdev);
2395         spin_unlock(&enic->enic_api_lock);
2396         call_netdevice_notifiers(NETDEV_REBOOT, enic->netdev);
2397
2398         rtnl_unlock();
2399 }
2400
2401 static int enic_set_intr_mode(struct enic *enic)
2402 {
2403         unsigned int n = min_t(unsigned int, enic->rq_count, ENIC_RQ_MAX);
2404         unsigned int m = min_t(unsigned int, enic->wq_count, ENIC_WQ_MAX);
2405         unsigned int i;
2406
2407         /* Set interrupt mode (INTx, MSI, MSI-X) depending
2408          * on system capabilities.
2409          *
2410          * Try MSI-X first
2411          *
2412          * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs
2413          * (the second to last INTR is used for WQ/RQ errors)
2414          * (the last INTR is used for notifications)
2415          */
2416
2417         BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2);
2418         for (i = 0; i < n + m + 2; i++)
2419                 enic->msix_entry[i].entry = i;
2420
2421         /* Use multiple RQs if RSS is enabled
2422          */
2423
2424         if (ENIC_SETTING(enic, RSS) &&
2425             enic->config.intr_mode < 1 &&
2426             enic->rq_count >= n &&
2427             enic->wq_count >= m &&
2428             enic->cq_count >= n + m &&
2429             enic->intr_count >= n + m + 2) {
2430
2431                 if (pci_enable_msix_range(enic->pdev, enic->msix_entry,
2432                                           n + m + 2, n + m + 2) > 0) {
2433
2434                         enic->rq_count = n;
2435                         enic->wq_count = m;
2436                         enic->cq_count = n + m;
2437                         enic->intr_count = n + m + 2;
2438
2439                         vnic_dev_set_intr_mode(enic->vdev,
2440                                 VNIC_DEV_INTR_MODE_MSIX);
2441
2442                         return 0;
2443                 }
2444         }
2445
2446         if (enic->config.intr_mode < 1 &&
2447             enic->rq_count >= 1 &&
2448             enic->wq_count >= m &&
2449             enic->cq_count >= 1 + m &&
2450             enic->intr_count >= 1 + m + 2) {
2451                 if (pci_enable_msix_range(enic->pdev, enic->msix_entry,
2452                                           1 + m + 2, 1 + m + 2) > 0) {
2453
2454                         enic->rq_count = 1;
2455                         enic->wq_count = m;
2456                         enic->cq_count = 1 + m;
2457                         enic->intr_count = 1 + m + 2;
2458
2459                         vnic_dev_set_intr_mode(enic->vdev,
2460                                 VNIC_DEV_INTR_MODE_MSIX);
2461
2462                         return 0;
2463                 }
2464         }
2465
2466         /* Next try MSI
2467          *
2468          * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR
2469          */
2470
2471         if (enic->config.intr_mode < 2 &&
2472             enic->rq_count >= 1 &&
2473             enic->wq_count >= 1 &&
2474             enic->cq_count >= 2 &&
2475             enic->intr_count >= 1 &&
2476             !pci_enable_msi(enic->pdev)) {
2477
2478                 enic->rq_count = 1;
2479                 enic->wq_count = 1;
2480                 enic->cq_count = 2;
2481                 enic->intr_count = 1;
2482
2483                 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI);
2484
2485                 return 0;
2486         }
2487
2488         /* Next try INTx
2489          *
2490          * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs
2491          * (the first INTR is used for WQ/RQ)
2492          * (the second INTR is used for WQ/RQ errors)
2493          * (the last INTR is used for notifications)
2494          */
2495
2496         if (enic->config.intr_mode < 3 &&
2497             enic->rq_count >= 1 &&
2498             enic->wq_count >= 1 &&
2499             enic->cq_count >= 2 &&
2500             enic->intr_count >= 3) {
2501
2502                 enic->rq_count = 1;
2503                 enic->wq_count = 1;
2504                 enic->cq_count = 2;
2505                 enic->intr_count = 3;
2506
2507                 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX);
2508
2509                 return 0;
2510         }
2511
2512         vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2513
2514         return -EINVAL;
2515 }
2516
2517 static void enic_clear_intr_mode(struct enic *enic)
2518 {
2519         switch (vnic_dev_get_intr_mode(enic->vdev)) {
2520         case VNIC_DEV_INTR_MODE_MSIX:
2521                 pci_disable_msix(enic->pdev);
2522                 break;
2523         case VNIC_DEV_INTR_MODE_MSI:
2524                 pci_disable_msi(enic->pdev);
2525                 break;
2526         default:
2527                 break;
2528         }
2529
2530         vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2531 }
2532
2533 static const struct net_device_ops enic_netdev_dynamic_ops = {
2534         .ndo_open               = enic_open,
2535         .ndo_stop               = enic_stop,
2536         .ndo_start_xmit         = enic_hard_start_xmit,
2537         .ndo_get_stats64        = enic_get_stats,
2538         .ndo_validate_addr      = eth_validate_addr,
2539         .ndo_set_rx_mode        = enic_set_rx_mode,
2540         .ndo_set_mac_address    = enic_set_mac_address_dynamic,
2541         .ndo_change_mtu         = enic_change_mtu,
2542         .ndo_vlan_rx_add_vid    = enic_vlan_rx_add_vid,
2543         .ndo_vlan_rx_kill_vid   = enic_vlan_rx_kill_vid,
2544         .ndo_tx_timeout         = enic_tx_timeout,
2545         .ndo_set_vf_port        = enic_set_vf_port,
2546         .ndo_get_vf_port        = enic_get_vf_port,
2547         .ndo_set_vf_mac         = enic_set_vf_mac,
2548 #ifdef CONFIG_NET_POLL_CONTROLLER
2549         .ndo_poll_controller    = enic_poll_controller,
2550 #endif
2551 #ifdef CONFIG_RFS_ACCEL
2552         .ndo_rx_flow_steer      = enic_rx_flow_steer,
2553 #endif
2554         .ndo_udp_tunnel_add     = enic_udp_tunnel_add,
2555         .ndo_udp_tunnel_del     = enic_udp_tunnel_del,
2556         .ndo_features_check     = enic_features_check,
2557 };
2558
2559 static const struct net_device_ops enic_netdev_ops = {
2560         .ndo_open               = enic_open,
2561         .ndo_stop               = enic_stop,
2562         .ndo_start_xmit         = enic_hard_start_xmit,
2563         .ndo_get_stats64        = enic_get_stats,
2564         .ndo_validate_addr      = eth_validate_addr,
2565         .ndo_set_mac_address    = enic_set_mac_address,
2566         .ndo_set_rx_mode        = enic_set_rx_mode,
2567         .ndo_change_mtu         = enic_change_mtu,
2568         .ndo_vlan_rx_add_vid    = enic_vlan_rx_add_vid,
2569         .ndo_vlan_rx_kill_vid   = enic_vlan_rx_kill_vid,
2570         .ndo_tx_timeout         = enic_tx_timeout,
2571         .ndo_set_vf_port        = enic_set_vf_port,
2572         .ndo_get_vf_port        = enic_get_vf_port,
2573         .ndo_set_vf_mac         = enic_set_vf_mac,
2574 #ifdef CONFIG_NET_POLL_CONTROLLER
2575         .ndo_poll_controller    = enic_poll_controller,
2576 #endif
2577 #ifdef CONFIG_RFS_ACCEL
2578         .ndo_rx_flow_steer      = enic_rx_flow_steer,
2579 #endif
2580         .ndo_udp_tunnel_add     = enic_udp_tunnel_add,
2581         .ndo_udp_tunnel_del     = enic_udp_tunnel_del,
2582         .ndo_features_check     = enic_features_check,
2583 };
2584
2585 static void enic_dev_deinit(struct enic *enic)
2586 {
2587         unsigned int i;
2588
2589         for (i = 0; i < enic->rq_count; i++) {
2590                 napi_hash_del(&enic->napi[i]);
2591                 netif_napi_del(&enic->napi[i]);
2592         }
2593         if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX)
2594                 for (i = 0; i < enic->wq_count; i++)
2595                         netif_napi_del(&enic->napi[enic_cq_wq(enic, i)]);
2596
2597         enic_free_vnic_resources(enic);
2598         enic_clear_intr_mode(enic);
2599         enic_free_affinity_hint(enic);
2600 }
2601
2602 static void enic_kdump_kernel_config(struct enic *enic)
2603 {
2604         if (is_kdump_kernel()) {
2605                 dev_info(enic_get_dev(enic), "Running from within kdump kernel. Using minimal resources\n");
2606                 enic->rq_count = 1;
2607                 enic->wq_count = 1;
2608                 enic->config.rq_desc_count = ENIC_MIN_RQ_DESCS;
2609                 enic->config.wq_desc_count = ENIC_MIN_WQ_DESCS;
2610                 enic->config.mtu = min_t(u16, 1500, enic->config.mtu);
2611         }
2612 }
2613
2614 static int enic_dev_init(struct enic *enic)
2615 {
2616         struct device *dev = enic_get_dev(enic);
2617         struct net_device *netdev = enic->netdev;
2618         unsigned int i;
2619         int err;
2620
2621         /* Get interrupt coalesce timer info */
2622         err = enic_dev_intr_coal_timer_info(enic);
2623         if (err) {
2624                 dev_warn(dev, "Using default conversion factor for "
2625                         "interrupt coalesce timer\n");
2626                 vnic_dev_intr_coal_timer_info_default(enic->vdev);
2627         }
2628
2629         /* Get vNIC configuration
2630          */
2631
2632         err = enic_get_vnic_config(enic);
2633         if (err) {
2634                 dev_err(dev, "Get vNIC configuration failed, aborting\n");
2635                 return err;
2636         }
2637
2638         /* Get available resource counts
2639          */
2640
2641         enic_get_res_counts(enic);
2642
2643         /* modify resource count if we are in kdump_kernel
2644          */
2645         enic_kdump_kernel_config(enic);
2646
2647         /* Set interrupt mode based on resource counts and system
2648          * capabilities
2649          */
2650
2651         err = enic_set_intr_mode(enic);
2652         if (err) {
2653                 dev_err(dev, "Failed to set intr mode based on resource "
2654                         "counts and system capabilities, aborting\n");
2655                 return err;
2656         }
2657
2658         /* Allocate and configure vNIC resources
2659          */
2660
2661         err = enic_alloc_vnic_resources(enic);
2662         if (err) {
2663                 dev_err(dev, "Failed to alloc vNIC resources, aborting\n");
2664                 goto err_out_free_vnic_resources;
2665         }
2666
2667         enic_init_vnic_resources(enic);
2668
2669         err = enic_set_rss_nic_cfg(enic);
2670         if (err) {
2671                 dev_err(dev, "Failed to config nic, aborting\n");
2672                 goto err_out_free_vnic_resources;
2673         }
2674
2675         switch (vnic_dev_get_intr_mode(enic->vdev)) {
2676         default:
2677                 netif_napi_add(netdev, &enic->napi[0], enic_poll, 64);
2678                 break;
2679         case VNIC_DEV_INTR_MODE_MSIX:
2680                 for (i = 0; i < enic->rq_count; i++) {
2681                         netif_napi_add(netdev, &enic->napi[i],
2682                                 enic_poll_msix_rq, NAPI_POLL_WEIGHT);
2683                 }
2684                 for (i = 0; i < enic->wq_count; i++)
2685                         netif_napi_add(netdev, &enic->napi[enic_cq_wq(enic, i)],
2686                                        enic_poll_msix_wq, NAPI_POLL_WEIGHT);
2687                 break;
2688         }
2689
2690         return 0;
2691
2692 err_out_free_vnic_resources:
2693         enic_free_affinity_hint(enic);
2694         enic_clear_intr_mode(enic);
2695         enic_free_vnic_resources(enic);
2696
2697         return err;
2698 }
2699
2700 static void enic_iounmap(struct enic *enic)
2701 {
2702         unsigned int i;
2703
2704         for (i = 0; i < ARRAY_SIZE(enic->bar); i++)
2705                 if (enic->bar[i].vaddr)
2706                         iounmap(enic->bar[i].vaddr);
2707 }
2708
2709 static int enic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2710 {
2711         struct device *dev = &pdev->dev;
2712         struct net_device *netdev;
2713         struct enic *enic;
2714         int using_dac = 0;
2715         unsigned int i;
2716         int err;
2717 #ifdef CONFIG_PCI_IOV
2718         int pos = 0;
2719 #endif
2720         int num_pps = 1;
2721
2722         /* Allocate net device structure and initialize.  Private
2723          * instance data is initialized to zero.
2724          */
2725
2726         netdev = alloc_etherdev_mqs(sizeof(struct enic),
2727                                     ENIC_RQ_MAX, ENIC_WQ_MAX);
2728         if (!netdev)
2729                 return -ENOMEM;
2730
2731         pci_set_drvdata(pdev, netdev);
2732
2733         SET_NETDEV_DEV(netdev, &pdev->dev);
2734
2735         enic = netdev_priv(netdev);
2736         enic->netdev = netdev;
2737         enic->pdev = pdev;
2738
2739         /* Setup PCI resources
2740          */
2741
2742         err = pci_enable_device_mem(pdev);
2743         if (err) {
2744                 dev_err(dev, "Cannot enable PCI device, aborting\n");
2745                 goto err_out_free_netdev;
2746         }
2747
2748         err = pci_request_regions(pdev, DRV_NAME);
2749         if (err) {
2750                 dev_err(dev, "Cannot request PCI regions, aborting\n");
2751                 goto err_out_disable_device;
2752         }
2753
2754         pci_set_master(pdev);
2755
2756         /* Query PCI controller on system for DMA addressing
2757          * limitation for the device.  Try 47-bit first, and
2758          * fail to 32-bit.
2759          */
2760
2761         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(47));
2762         if (err) {
2763                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2764                 if (err) {
2765                         dev_err(dev, "No usable DMA configuration, aborting\n");
2766                         goto err_out_release_regions;
2767                 }
2768                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
2769                 if (err) {
2770                         dev_err(dev, "Unable to obtain %u-bit DMA "
2771                                 "for consistent allocations, aborting\n", 32);
2772                         goto err_out_release_regions;
2773                 }
2774         } else {
2775                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(47));
2776                 if (err) {
2777                         dev_err(dev, "Unable to obtain %u-bit DMA "
2778                                 "for consistent allocations, aborting\n", 47);
2779                         goto err_out_release_regions;
2780                 }
2781                 using_dac = 1;
2782         }
2783
2784         /* Map vNIC resources from BAR0-5
2785          */
2786
2787         for (i = 0; i < ARRAY_SIZE(enic->bar); i++) {
2788                 if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
2789                         continue;
2790                 enic->bar[i].len = pci_resource_len(pdev, i);
2791                 enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len);
2792                 if (!enic->bar[i].vaddr) {
2793                         dev_err(dev, "Cannot memory-map BAR %d, aborting\n", i);
2794                         err = -ENODEV;
2795                         goto err_out_iounmap;
2796                 }
2797                 enic->bar[i].bus_addr = pci_resource_start(pdev, i);
2798         }
2799
2800         /* Register vNIC device
2801          */
2802
2803         enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar,
2804                 ARRAY_SIZE(enic->bar));
2805         if (!enic->vdev) {
2806                 dev_err(dev, "vNIC registration failed, aborting\n");
2807                 err = -ENODEV;
2808                 goto err_out_iounmap;
2809         }
2810
2811         err = vnic_devcmd_init(enic->vdev);
2812
2813         if (err)
2814                 goto err_out_vnic_unregister;
2815
2816 #ifdef CONFIG_PCI_IOV
2817         /* Get number of subvnics */
2818         pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_SRIOV);
2819         if (pos) {
2820                 pci_read_config_word(pdev, pos + PCI_SRIOV_TOTAL_VF,
2821                         &enic->num_vfs);
2822                 if (enic->num_vfs) {
2823                         err = pci_enable_sriov(pdev, enic->num_vfs);
2824                         if (err) {
2825                                 dev_err(dev, "SRIOV enable failed, aborting."
2826                                         " pci_enable_sriov() returned %d\n",
2827                                         err);
2828                                 goto err_out_vnic_unregister;
2829                         }
2830                         enic->priv_flags |= ENIC_SRIOV_ENABLED;
2831                         num_pps = enic->num_vfs;
2832                 }
2833         }
2834 #endif
2835
2836         /* Allocate structure for port profiles */
2837         enic->pp = kcalloc(num_pps, sizeof(*enic->pp), GFP_KERNEL);
2838         if (!enic->pp) {
2839                 err = -ENOMEM;
2840                 goto err_out_disable_sriov_pp;
2841         }
2842
2843         /* Issue device open to get device in known state
2844          */
2845
2846         err = enic_dev_open(enic);
2847         if (err) {
2848                 dev_err(dev, "vNIC dev open failed, aborting\n");
2849                 goto err_out_disable_sriov;
2850         }
2851
2852         /* Setup devcmd lock
2853          */
2854
2855         spin_lock_init(&enic->devcmd_lock);
2856         spin_lock_init(&enic->enic_api_lock);
2857
2858         /*
2859          * Set ingress vlan rewrite mode before vnic initialization
2860          */
2861
2862         err = enic_dev_set_ig_vlan_rewrite_mode(enic);
2863         if (err) {
2864                 dev_err(dev,
2865                         "Failed to set ingress vlan rewrite mode, aborting.\n");
2866                 goto err_out_dev_close;
2867         }
2868
2869         /* Issue device init to initialize the vnic-to-switch link.
2870          * We'll start with carrier off and wait for link UP
2871          * notification later to turn on carrier.  We don't need
2872          * to wait here for the vnic-to-switch link initialization
2873          * to complete; link UP notification is the indication that
2874          * the process is complete.
2875          */
2876
2877         netif_carrier_off(netdev);
2878
2879         /* Do not call dev_init for a dynamic vnic.
2880          * For a dynamic vnic, init_prov_info will be
2881          * called later by an upper layer.
2882          */
2883
2884         if (!enic_is_dynamic(enic)) {
2885                 err = vnic_dev_init(enic->vdev, 0);
2886                 if (err) {
2887                         dev_err(dev, "vNIC dev init failed, aborting\n");
2888                         goto err_out_dev_close;
2889                 }
2890         }
2891
2892         err = enic_dev_init(enic);
2893         if (err) {
2894                 dev_err(dev, "Device initialization failed, aborting\n");
2895                 goto err_out_dev_close;
2896         }
2897
2898         netif_set_real_num_tx_queues(netdev, enic->wq_count);
2899         netif_set_real_num_rx_queues(netdev, enic->rq_count);
2900
2901         /* Setup notification timer, HW reset task, and wq locks
2902          */
2903
2904         timer_setup(&enic->notify_timer, enic_notify_timer, 0);
2905
2906         enic_rfs_flw_tbl_init(enic);
2907         enic_set_rx_coal_setting(enic);
2908         INIT_WORK(&enic->reset, enic_reset);
2909         INIT_WORK(&enic->tx_hang_reset, enic_tx_hang_reset);
2910         INIT_WORK(&enic->change_mtu_work, enic_change_mtu_work);
2911
2912         for (i = 0; i < enic->wq_count; i++)
2913                 spin_lock_init(&enic->wq_lock[i]);
2914
2915         /* Register net device
2916          */
2917
2918         enic->port_mtu = enic->config.mtu;
2919         (void)enic_change_mtu(netdev, enic->port_mtu);
2920
2921         err = enic_set_mac_addr(netdev, enic->mac_addr);
2922         if (err) {
2923                 dev_err(dev, "Invalid MAC address, aborting\n");
2924                 goto err_out_dev_deinit;
2925         }
2926
2927         enic->tx_coalesce_usecs = enic->config.intr_timer_usec;
2928         /* rx coalesce time already got initialized. This gets used
2929          * if adaptive coal is turned off
2930          */
2931         enic->rx_coalesce_usecs = enic->tx_coalesce_usecs;
2932
2933         if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic))
2934                 netdev->netdev_ops = &enic_netdev_dynamic_ops;
2935         else
2936                 netdev->netdev_ops = &enic_netdev_ops;
2937
2938         netdev->watchdog_timeo = 2 * HZ;
2939         enic_set_ethtool_ops(netdev);
2940
2941         netdev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX;
2942         if (ENIC_SETTING(enic, LOOP)) {
2943                 netdev->features &= ~NETIF_F_HW_VLAN_CTAG_TX;
2944                 enic->loop_enable = 1;
2945                 enic->loop_tag = enic->config.loop_tag;
2946                 dev_info(dev, "loopback tag=0x%04x\n", enic->loop_tag);
2947         }
2948         if (ENIC_SETTING(enic, TXCSUM))
2949                 netdev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM;
2950         if (ENIC_SETTING(enic, TSO))
2951                 netdev->hw_features |= NETIF_F_TSO |
2952                         NETIF_F_TSO6 | NETIF_F_TSO_ECN;
2953         if (ENIC_SETTING(enic, RSS))
2954                 netdev->hw_features |= NETIF_F_RXHASH;
2955         if (ENIC_SETTING(enic, RXCSUM))
2956                 netdev->hw_features |= NETIF_F_RXCSUM;
2957         if (ENIC_SETTING(enic, VXLAN)) {
2958                 u64 patch_level;
2959                 u64 a1 = 0;
2960
2961                 netdev->hw_enc_features |= NETIF_F_RXCSUM               |
2962                                            NETIF_F_TSO                  |
2963                                            NETIF_F_TSO6                 |
2964                                            NETIF_F_TSO_ECN              |
2965                                            NETIF_F_GSO_UDP_TUNNEL       |
2966                                            NETIF_F_HW_CSUM              |
2967                                            NETIF_F_GSO_UDP_TUNNEL_CSUM;
2968                 netdev->hw_features |= netdev->hw_enc_features;
2969                 /* get bit mask from hw about supported offload bit level
2970                  * BIT(0) = fw supports patch_level 0
2971                  *          fcoe bit = encap
2972                  *          fcoe_fc_crc_ok = outer csum ok
2973                  * BIT(1) = always set by fw
2974                  * BIT(2) = fw supports patch_level 2
2975                  *          BIT(0) in rss_hash = encap
2976                  *          BIT(1,2) in rss_hash = outer_ip_csum_ok/
2977                  *                                 outer_tcp_csum_ok
2978                  * used in enic_rq_indicate_buf
2979                  */
2980                 err = vnic_dev_get_supported_feature_ver(enic->vdev,
2981                                                          VIC_FEATURE_VXLAN,
2982                                                          &patch_level, &a1);
2983                 if (err)
2984                         patch_level = 0;
2985                 enic->vxlan.flags = (u8)a1;
2986                 /* mask bits that are supported by driver
2987                  */
2988                 patch_level &= BIT_ULL(0) | BIT_ULL(2);
2989                 patch_level = fls(patch_level);
2990                 patch_level = patch_level ? patch_level - 1 : 0;
2991                 enic->vxlan.patch_level = patch_level;
2992         }
2993
2994         netdev->features |= netdev->hw_features;
2995         netdev->vlan_features |= netdev->features;
2996
2997 #ifdef CONFIG_RFS_ACCEL
2998         netdev->hw_features |= NETIF_F_NTUPLE;
2999 #endif
3000
3001         if (using_dac)
3002                 netdev->features |= NETIF_F_HIGHDMA;
3003
3004         netdev->priv_flags |= IFF_UNICAST_FLT;
3005
3006         /* MTU range: 68 - 9000 */
3007         netdev->min_mtu = ENIC_MIN_MTU;
3008         netdev->max_mtu = ENIC_MAX_MTU;
3009
3010         err = register_netdev(netdev);
3011         if (err) {
3012                 dev_err(dev, "Cannot register net device, aborting\n");
3013                 goto err_out_dev_deinit;
3014         }
3015         enic->rx_copybreak = RX_COPYBREAK_DEFAULT;
3016
3017         return 0;
3018
3019 err_out_dev_deinit:
3020         enic_dev_deinit(enic);
3021 err_out_dev_close:
3022         vnic_dev_close(enic->vdev);
3023 err_out_disable_sriov:
3024         kfree(enic->pp);
3025 err_out_disable_sriov_pp:
3026 #ifdef CONFIG_PCI_IOV
3027         if (enic_sriov_enabled(enic)) {
3028                 pci_disable_sriov(pdev);
3029                 enic->priv_flags &= ~ENIC_SRIOV_ENABLED;
3030         }
3031 #endif
3032 err_out_vnic_unregister:
3033         vnic_dev_unregister(enic->vdev);
3034 err_out_iounmap:
3035         enic_iounmap(enic);
3036 err_out_release_regions:
3037         pci_release_regions(pdev);
3038 err_out_disable_device:
3039         pci_disable_device(pdev);
3040 err_out_free_netdev:
3041         free_netdev(netdev);
3042
3043         return err;
3044 }
3045
3046 static void enic_remove(struct pci_dev *pdev)
3047 {
3048         struct net_device *netdev = pci_get_drvdata(pdev);
3049
3050         if (netdev) {
3051                 struct enic *enic = netdev_priv(netdev);
3052
3053                 cancel_work_sync(&enic->reset);
3054                 cancel_work_sync(&enic->change_mtu_work);
3055                 unregister_netdev(netdev);
3056                 enic_dev_deinit(enic);
3057                 vnic_dev_close(enic->vdev);
3058 #ifdef CONFIG_PCI_IOV
3059                 if (enic_sriov_enabled(enic)) {
3060                         pci_disable_sriov(pdev);
3061                         enic->priv_flags &= ~ENIC_SRIOV_ENABLED;
3062                 }
3063 #endif
3064                 kfree(enic->pp);
3065                 vnic_dev_unregister(enic->vdev);
3066                 enic_iounmap(enic);
3067                 pci_release_regions(pdev);
3068                 pci_disable_device(pdev);
3069                 free_netdev(netdev);
3070         }
3071 }
3072
3073 static struct pci_driver enic_driver = {
3074         .name = DRV_NAME,
3075         .id_table = enic_id_table,
3076         .probe = enic_probe,
3077         .remove = enic_remove,
3078 };
3079
3080 static int __init enic_init_module(void)
3081 {
3082         pr_info("%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
3083
3084         return pci_register_driver(&enic_driver);
3085 }
3086
3087 static void __exit enic_cleanup_module(void)
3088 {
3089         pci_unregister_driver(&enic_driver);
3090 }
3091
3092 module_init(enic_init_module);
3093 module_exit(enic_cleanup_module);