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 #include <net/netdev_queues.h>
  50
  51 #include "cq_enet_desc.h"
  52 #include "vnic_dev.h"
  53 #include "vnic_intr.h"
  54 #include "vnic_stats.h"
  55 #include "vnic_vic.h"
  56 #include "enic_res.h"
  57 #include "enic.h"
  58 #include "enic_dev.h"
  59 #include "enic_pp.h"
  60 #include "enic_clsf.h"
  61
  62 #define ENIC_NOTIFY_TIMER_PERIOD        (2 * HZ)
  63 #define WQ_ENET_MAX_DESC_LEN            (1 << WQ_ENET_LEN_BITS)
  64 #define MAX_TSO                         (1 << 16)
  65 #define ENIC_DESC_MAX_SPLITS            (MAX_TSO / WQ_ENET_MAX_DESC_LEN + 1)
  66
  67 #define PCI_DEVICE_ID_CISCO_VIC_ENET         0x0043  /* ethernet vnic */
  68 #define PCI_DEVICE_ID_CISCO_VIC_ENET_DYN     0x0044  /* enet dynamic vnic */
  69 #define PCI_DEVICE_ID_CISCO_VIC_ENET_VF      0x0071  /* enet SRIOV VF */
  70
  71 #define RX_COPYBREAK_DEFAULT            256
  72
  73 /* Supported devices */
  74 static const struct pci_device_id enic_id_table[] = {
  75         { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET) },
  76         { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_DYN) },
  77         { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_VF) },
  78         { 0, }  /* end of table */
  79 };
  80
  81 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  82 MODULE_AUTHOR("Scott Feldman <[email protected]>");
  83 MODULE_LICENSE("GPL");
  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                     (cpumask_available(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                     !cpumask_available(enic->msix[i].affinity_mask) ||
 152                     cpumask_empty(enic->msix[i].affinity_mask))
 153                         continue;
 154                 err = irq_update_affinity_hint(enic->msix_entry[i].vector,
 155                                                enic->msix[i].affinity_mask);
 156                 if (err)
 157                         netdev_warn(enic->netdev, "irq_update_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 (cpumask_available(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_update_affinity_hint(enic->msix_entry[i].vector, NULL);
 178 }
 179
 180 static int enic_udp_tunnel_set_port(struct net_device *netdev,
 181                                     unsigned int table, unsigned int entry,
 182                                     struct udp_tunnel_info *ti)
 183 {
 184         struct enic *enic = netdev_priv(netdev);
 185         int err;
 186
 187         spin_lock_bh(&enic->devcmd_lock);
 188
 189         err = vnic_dev_overlay_offload_cfg(enic->vdev,
 190                                            OVERLAY_CFG_VXLAN_PORT_UPDATE,
 191                                            ntohs(ti->port));
 192         if (err)
 193                 goto error;
 194
 195         err = vnic_dev_overlay_offload_ctrl(enic->vdev, OVERLAY_FEATURE_VXLAN,
 196                                             enic->vxlan.patch_level);
 197         if (err)
 198                 goto error;
 199
 200         enic->vxlan.vxlan_udp_port_number = ntohs(ti->port);
 201 error:
 202         spin_unlock_bh(&enic->devcmd_lock);
 203
 204         return err;
 205 }
 206
 207 static int enic_udp_tunnel_unset_port(struct net_device *netdev,
 208                                       unsigned int table, unsigned int entry,
 209                                       struct udp_tunnel_info *ti)
 210 {
 211         struct enic *enic = netdev_priv(netdev);
 212         int err;
 213
 214         spin_lock_bh(&enic->devcmd_lock);
 215
 216         err = vnic_dev_overlay_offload_ctrl(enic->vdev, OVERLAY_FEATURE_VXLAN,
 217                                             OVERLAY_OFFLOAD_DISABLE);
 218         if (err)
 219                 goto unlock;
 220
 221         enic->vxlan.vxlan_udp_port_number = 0;
 222
 223 unlock:
 224         spin_unlock_bh(&enic->devcmd_lock);
 225
 226         return err;
 227 }
 228
 229 static const struct udp_tunnel_nic_info enic_udp_tunnels = {
 230         .set_port       = enic_udp_tunnel_set_port,
 231         .unset_port     = enic_udp_tunnel_unset_port,
 232         .tables         = {
 233                 { .n_entries = 1, .tunnel_types = UDP_TUNNEL_TYPE_VXLAN, },
 234         },
 235 }, enic_udp_tunnels_v4 = {
 236         .set_port       = enic_udp_tunnel_set_port,
 237         .unset_port     = enic_udp_tunnel_unset_port,
 238         .flags          = UDP_TUNNEL_NIC_INFO_IPV4_ONLY,
 239         .tables         = {
 240                 { .n_entries = 1, .tunnel_types = UDP_TUNNEL_TYPE_VXLAN, },
 241         },
 242 };
 243
 244 static netdev_features_t enic_features_check(struct sk_buff *skb,
 245                                              struct net_device *dev,
 246                                              netdev_features_t features)
 247 {
 248         const struct ethhdr *eth = (struct ethhdr *)skb_inner_mac_header(skb);
 249         struct enic *enic = netdev_priv(dev);
 250         struct udphdr *udph;
 251         u16 port = 0;
 252         u8 proto;
 253
 254         if (!skb->encapsulation)
 255                 return features;
 256
 257         features = vxlan_features_check(skb, features);
 258
 259         switch (vlan_get_protocol(skb)) {
 260         case htons(ETH_P_IPV6):
 261                 if (!(enic->vxlan.flags & ENIC_VXLAN_OUTER_IPV6))
 262                         goto out;
 263                 proto = ipv6_hdr(skb)->nexthdr;
 264                 break;
 265         case htons(ETH_P_IP):
 266                 proto = ip_hdr(skb)->protocol;
 267                 break;
 268         default:
 269                 goto out;
 270         }
 271
 272         switch (eth->h_proto) {
 273         case ntohs(ETH_P_IPV6):
 274                 if (!(enic->vxlan.flags & ENIC_VXLAN_INNER_IPV6))
 275                         goto out;
 276                 fallthrough;
 277         case ntohs(ETH_P_IP):
 278                 break;
 279         default:
 280                 goto out;
 281         }
 282
 283
 284         if (proto == IPPROTO_UDP) {
 285                 udph = udp_hdr(skb);
 286                 port = be16_to_cpu(udph->dest);
 287         }
 288
 289         /* HW supports offload of only one UDP port. Remove CSUM and GSO MASK
 290          * for other UDP port tunnels
 291          */
 292         if (port  != enic->vxlan.vxlan_udp_port_number)
 293                 goto out;
 294
 295         return features;
 296
 297 out:
 298         return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK);
 299 }
 300
 301 int enic_is_dynamic(struct enic *enic)
 302 {
 303         return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_DYN;
 304 }
 305
 306 int enic_sriov_enabled(struct enic *enic)
 307 {
 308         return (enic->priv_flags & ENIC_SRIOV_ENABLED) ? 1 : 0;
 309 }
 310
 311 static int enic_is_sriov_vf(struct enic *enic)
 312 {
 313         return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_VF;
 314 }
 315
 316 int enic_is_valid_vf(struct enic *enic, int vf)
 317 {
 318 #ifdef CONFIG_PCI_IOV
 319         return vf >= 0 && vf < enic->num_vfs;
 320 #else
 321         return 0;
 322 #endif
 323 }
 324
 325 static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
 326 {
 327         struct enic *enic = vnic_dev_priv(wq->vdev);
 328
 329         if (buf->sop)
 330                 dma_unmap_single(&enic->pdev->dev, buf->dma_addr, buf->len,
 331                                  DMA_TO_DEVICE);
 332         else
 333                 dma_unmap_page(&enic->pdev->dev, buf->dma_addr, buf->len,
 334                                DMA_TO_DEVICE);
 335
 336         if (buf->os_buf)
 337                 dev_kfree_skb_any(buf->os_buf);
 338 }
 339
 340 static void enic_wq_free_buf(struct vnic_wq *wq,
 341         struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque)
 342 {
 343         struct enic *enic = vnic_dev_priv(wq->vdev);
 344
 345         enic->wq[wq->index].stats.cq_work++;
 346         enic->wq[wq->index].stats.cq_bytes += buf->len;
 347         enic_free_wq_buf(wq, buf);
 348 }
 349
 350 static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
 351         u8 type, u16 q_number, u16 completed_index, void *opaque)
 352 {
 353         struct enic *enic = vnic_dev_priv(vdev);
 354
 355         spin_lock(&enic->wq[q_number].lock);
 356
 357         vnic_wq_service(&enic->wq[q_number].vwq, cq_desc,
 358                 completed_index, enic_wq_free_buf,
 359                 opaque);
 360
 361         if (netif_tx_queue_stopped(netdev_get_tx_queue(enic->netdev, q_number)) &&
 362             vnic_wq_desc_avail(&enic->wq[q_number].vwq) >=
 363             (MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS)) {
 364                 netif_wake_subqueue(enic->netdev, q_number);
 365                 enic->wq[q_number].stats.wake++;
 366         }
 367
 368         spin_unlock(&enic->wq[q_number].lock);
 369
 370         return 0;
 371 }
 372
 373 static bool enic_log_q_error(struct enic *enic)
 374 {
 375         unsigned int i;
 376         u32 error_status;
 377         bool err = false;
 378
 379         for (i = 0; i < enic->wq_count; i++) {
 380                 error_status = vnic_wq_error_status(&enic->wq[i].vwq);
 381                 err |= error_status;
 382                 if (error_status)
 383                         netdev_err(enic->netdev, "WQ[%d] error_status %d\n",
 384                                 i, error_status);
 385         }
 386
 387         for (i = 0; i < enic->rq_count; i++) {
 388                 error_status = vnic_rq_error_status(&enic->rq[i].vrq);
 389                 err |= error_status;
 390                 if (error_status)
 391                         netdev_err(enic->netdev, "RQ[%d] error_status %d\n",
 392                                 i, error_status);
 393         }
 394
 395         return err;
 396 }
 397
 398 static void enic_msglvl_check(struct enic *enic)
 399 {
 400         u32 msg_enable = vnic_dev_msg_lvl(enic->vdev);
 401
 402         if (msg_enable != enic->msg_enable) {
 403                 netdev_info(enic->netdev, "msg lvl changed from 0x%x to 0x%x\n",
 404                         enic->msg_enable, msg_enable);
 405                 enic->msg_enable = msg_enable;
 406         }
 407 }
 408
 409 static void enic_mtu_check(struct enic *enic)
 410 {
 411         u32 mtu = vnic_dev_mtu(enic->vdev);
 412         struct net_device *netdev = enic->netdev;
 413
 414         if (mtu && mtu != enic->port_mtu) {
 415                 enic->port_mtu = mtu;
 416                 if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) {
 417                         mtu = max_t(int, ENIC_MIN_MTU,
 418                                 min_t(int, ENIC_MAX_MTU, mtu));
 419                         if (mtu != netdev->mtu)
 420                                 schedule_work(&enic->change_mtu_work);
 421                 } else {
 422                         if (mtu < netdev->mtu)
 423                                 netdev_warn(netdev,
 424                                         "interface MTU (%d) set higher "
 425                                         "than switch port MTU (%d)\n",
 426                                         netdev->mtu, mtu);
 427                 }
 428         }
 429 }
 430
 431 static void enic_link_check(struct enic *enic)
 432 {
 433         int link_status = vnic_dev_link_status(enic->vdev);
 434         int carrier_ok = netif_carrier_ok(enic->netdev);
 435
 436         if (link_status && !carrier_ok) {
 437                 netdev_info(enic->netdev, "Link UP\n");
 438                 netif_carrier_on(enic->netdev);
 439         } else if (!link_status && carrier_ok) {
 440                 netdev_info(enic->netdev, "Link DOWN\n");
 441                 netif_carrier_off(enic->netdev);
 442         }
 443 }
 444
 445 static void enic_notify_check(struct enic *enic)
 446 {
 447         enic_msglvl_check(enic);
 448         enic_mtu_check(enic);
 449         enic_link_check(enic);
 450 }
 451
 452 #define ENIC_TEST_INTR(pba, i) (pba & (1 << i))
 453
 454 static irqreturn_t enic_isr_legacy(int irq, void *data)
 455 {
 456         struct net_device *netdev = data;
 457         struct enic *enic = netdev_priv(netdev);
 458         unsigned int io_intr = ENIC_LEGACY_IO_INTR;
 459         unsigned int err_intr = ENIC_LEGACY_ERR_INTR;
 460         unsigned int notify_intr = ENIC_LEGACY_NOTIFY_INTR;
 461         u32 pba;
 462
 463         vnic_intr_mask(&enic->intr[io_intr]);
 464
 465         pba = vnic_intr_legacy_pba(enic->legacy_pba);
 466         if (!pba) {
 467                 vnic_intr_unmask(&enic->intr[io_intr]);
 468                 return IRQ_NONE;        /* not our interrupt */
 469         }
 470
 471         if (ENIC_TEST_INTR(pba, notify_intr)) {
 472                 enic_notify_check(enic);
 473                 vnic_intr_return_all_credits(&enic->intr[notify_intr]);
 474         }
 475
 476         if (ENIC_TEST_INTR(pba, err_intr)) {
 477                 vnic_intr_return_all_credits(&enic->intr[err_intr]);
 478                 enic_log_q_error(enic);
 479                 /* schedule recovery from WQ/RQ error */
 480                 schedule_work(&enic->reset);
 481                 return IRQ_HANDLED;
 482         }
 483
 484         if (ENIC_TEST_INTR(pba, io_intr))
 485                 napi_schedule_irqoff(&enic->napi[0]);
 486         else
 487                 vnic_intr_unmask(&enic->intr[io_intr]);
 488
 489         return IRQ_HANDLED;
 490 }
 491
 492 static irqreturn_t enic_isr_msi(int irq, void *data)
 493 {
 494         struct enic *enic = data;
 495
 496         /* With MSI, there is no sharing of interrupts, so this is
 497          * our interrupt and there is no need to ack it.  The device
 498          * is not providing per-vector masking, so the OS will not
 499          * write to PCI config space to mask/unmask the interrupt.
 500          * We're using mask_on_assertion for MSI, so the device
 501          * automatically masks the interrupt when the interrupt is
 502          * generated.  Later, when exiting polling, the interrupt
 503          * will be unmasked (see enic_poll).
 504          *
 505          * Also, the device uses the same PCIe Traffic Class (TC)
 506          * for Memory Write data and MSI, so there are no ordering
 507          * issues; the MSI will always arrive at the Root Complex
 508          * _after_ corresponding Memory Writes (i.e. descriptor
 509          * writes).
 510          */
 511
 512         napi_schedule_irqoff(&enic->napi[0]);
 513
 514         return IRQ_HANDLED;
 515 }
 516
 517 static irqreturn_t enic_isr_msix(int irq, void *data)
 518 {
 519         struct napi_struct *napi = data;
 520
 521         napi_schedule_irqoff(napi);
 522
 523         return IRQ_HANDLED;
 524 }
 525
 526 static irqreturn_t enic_isr_msix_err(int irq, void *data)
 527 {
 528         struct enic *enic = data;
 529         unsigned int intr = enic_msix_err_intr(enic);
 530
 531         vnic_intr_return_all_credits(&enic->intr[intr]);
 532
 533         if (enic_log_q_error(enic))
 534                 /* schedule recovery from WQ/RQ error */
 535                 schedule_work(&enic->reset);
 536
 537         return IRQ_HANDLED;
 538 }
 539
 540 static irqreturn_t enic_isr_msix_notify(int irq, void *data)
 541 {
 542         struct enic *enic = data;
 543         unsigned int intr = enic_msix_notify_intr(enic);
 544
 545         enic_notify_check(enic);
 546         vnic_intr_return_all_credits(&enic->intr[intr]);
 547
 548         return IRQ_HANDLED;
 549 }
 550
 551 static int enic_queue_wq_skb_cont(struct enic *enic, struct vnic_wq *wq,
 552                                   struct sk_buff *skb, unsigned int len_left,
 553                                   int loopback)
 554 {
 555         const skb_frag_t *frag;
 556         dma_addr_t dma_addr;
 557
 558         /* Queue additional data fragments */
 559         for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
 560                 len_left -= skb_frag_size(frag);
 561                 dma_addr = skb_frag_dma_map(&enic->pdev->dev, frag, 0,
 562                                             skb_frag_size(frag),
 563                                             DMA_TO_DEVICE);
 564                 if (unlikely(enic_dma_map_check(enic, dma_addr)))
 565                         return -ENOMEM;
 566                 enic_queue_wq_desc_cont(wq, skb, dma_addr, skb_frag_size(frag),
 567                                         (len_left == 0),        /* EOP? */
 568                                         loopback);
 569         }
 570
 571         return 0;
 572 }
 573
 574 static int enic_queue_wq_skb_vlan(struct enic *enic, struct vnic_wq *wq,
 575                                   struct sk_buff *skb, int vlan_tag_insert,
 576                                   unsigned int vlan_tag, int loopback)
 577 {
 578         unsigned int head_len = skb_headlen(skb);
 579         unsigned int len_left = skb->len - head_len;
 580         int eop = (len_left == 0);
 581         dma_addr_t dma_addr;
 582         int err = 0;
 583
 584         dma_addr = dma_map_single(&enic->pdev->dev, skb->data, head_len,
 585                                   DMA_TO_DEVICE);
 586         if (unlikely(enic_dma_map_check(enic, dma_addr)))
 587                 return -ENOMEM;
 588
 589         /* Queue the main skb fragment. The fragments are no larger
 590          * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
 591          * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
 592          * per fragment is queued.
 593          */
 594         enic_queue_wq_desc(wq, skb, dma_addr, head_len, vlan_tag_insert,
 595                            vlan_tag, eop, loopback);
 596
 597         if (!eop)
 598                 err = enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
 599
 600         /* The enic_queue_wq_desc() above does not do HW checksum */
 601         enic->wq[wq->index].stats.csum_none++;
 602         enic->wq[wq->index].stats.packets++;
 603         enic->wq[wq->index].stats.bytes += skb->len;
 604
 605         return err;
 606 }
 607
 608 static int enic_queue_wq_skb_csum_l4(struct enic *enic, struct vnic_wq *wq,
 609                                      struct sk_buff *skb, int vlan_tag_insert,
 610                                      unsigned int vlan_tag, int loopback)
 611 {
 612         unsigned int head_len = skb_headlen(skb);
 613         unsigned int len_left = skb->len - head_len;
 614         unsigned int hdr_len = skb_checksum_start_offset(skb);
 615         unsigned int csum_offset = hdr_len + skb->csum_offset;
 616         int eop = (len_left == 0);
 617         dma_addr_t dma_addr;
 618         int err = 0;
 619
 620         dma_addr = dma_map_single(&enic->pdev->dev, skb->data, head_len,
 621                                   DMA_TO_DEVICE);
 622         if (unlikely(enic_dma_map_check(enic, dma_addr)))
 623                 return -ENOMEM;
 624
 625         /* Queue the main skb fragment. The fragments are no larger
 626          * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
 627          * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
 628          * per fragment is queued.
 629          */
 630         enic_queue_wq_desc_csum_l4(wq, skb, dma_addr, head_len, csum_offset,
 631                                    hdr_len, vlan_tag_insert, vlan_tag, eop,
 632                                    loopback);
 633
 634         if (!eop)
 635                 err = enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
 636
 637         enic->wq[wq->index].stats.csum_partial++;
 638         enic->wq[wq->index].stats.packets++;
 639         enic->wq[wq->index].stats.bytes += skb->len;
 640
 641         return err;
 642 }
 643
 644 static void enic_preload_tcp_csum_encap(struct sk_buff *skb)
 645 {
 646         const struct ethhdr *eth = (struct ethhdr *)skb_inner_mac_header(skb);
 647
 648         switch (eth->h_proto) {
 649         case ntohs(ETH_P_IP):
 650                 inner_ip_hdr(skb)->check = 0;
 651                 inner_tcp_hdr(skb)->check =
 652                         ~csum_tcpudp_magic(inner_ip_hdr(skb)->saddr,
 653                                            inner_ip_hdr(skb)->daddr, 0,
 654                                            IPPROTO_TCP, 0);
 655                 break;
 656         case ntohs(ETH_P_IPV6):
 657                 inner_tcp_hdr(skb)->check =
 658                         ~csum_ipv6_magic(&inner_ipv6_hdr(skb)->saddr,
 659                                          &inner_ipv6_hdr(skb)->daddr, 0,
 660                                          IPPROTO_TCP, 0);
 661                 break;
 662         default:
 663                 WARN_ONCE(1, "Non ipv4/ipv6 inner pkt for encap offload");
 664                 break;
 665         }
 666 }
 667
 668 static void enic_preload_tcp_csum(struct sk_buff *skb)
 669 {
 670         /* Preload TCP csum field with IP pseudo hdr calculated
 671          * with IP length set to zero.  HW will later add in length
 672          * to each TCP segment resulting from the TSO.
 673          */
 674
 675         if (skb->protocol == cpu_to_be16(ETH_P_IP)) {
 676                 ip_hdr(skb)->check = 0;
 677                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr,
 678                         ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
 679         } else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) {
 680                 tcp_v6_gso_csum_prep(skb);
 681         }
 682 }
 683
 684 static int enic_queue_wq_skb_tso(struct enic *enic, struct vnic_wq *wq,
 685                                  struct sk_buff *skb, unsigned int mss,
 686                                  int vlan_tag_insert, unsigned int vlan_tag,
 687                                  int loopback)
 688 {
 689         unsigned int frag_len_left = skb_headlen(skb);
 690         unsigned int len_left = skb->len - frag_len_left;
 691         int eop = (len_left == 0);
 692         unsigned int offset = 0;
 693         unsigned int hdr_len;
 694         dma_addr_t dma_addr;
 695         unsigned int pkts;
 696         unsigned int len;
 697         skb_frag_t *frag;
 698
 699         if (skb->encapsulation) {
 700                 hdr_len = skb_inner_tcp_all_headers(skb);
 701                 enic_preload_tcp_csum_encap(skb);
 702                 enic->wq[wq->index].stats.encap_tso++;
 703         } else {
 704                 hdr_len = skb_tcp_all_headers(skb);
 705                 enic_preload_tcp_csum(skb);
 706                 enic->wq[wq->index].stats.tso++;
 707         }
 708
 709         /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
 710          * for the main skb fragment
 711          */
 712         while (frag_len_left) {
 713                 len = min(frag_len_left, (unsigned int)WQ_ENET_MAX_DESC_LEN);
 714                 dma_addr = dma_map_single(&enic->pdev->dev,
 715                                           skb->data + offset, len,
 716                                           DMA_TO_DEVICE);
 717                 if (unlikely(enic_dma_map_check(enic, dma_addr)))
 718                         return -ENOMEM;
 719                 enic_queue_wq_desc_tso(wq, skb, dma_addr, len, mss, hdr_len,
 720                                        vlan_tag_insert, vlan_tag,
 721                                        eop && (len == frag_len_left), loopback);
 722                 frag_len_left -= len;
 723                 offset += len;
 724         }
 725
 726         if (eop)
 727                 goto tso_out_stats;
 728
 729         /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
 730          * for additional data fragments
 731          */
 732         for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
 733                 len_left -= skb_frag_size(frag);
 734                 frag_len_left = skb_frag_size(frag);
 735                 offset = 0;
 736
 737                 while (frag_len_left) {
 738                         len = min(frag_len_left,
 739                                 (unsigned int)WQ_ENET_MAX_DESC_LEN);
 740                         dma_addr = skb_frag_dma_map(&enic->pdev->dev, frag,
 741                                                     offset, len,
 742                                                     DMA_TO_DEVICE);
 743                         if (unlikely(enic_dma_map_check(enic, dma_addr)))
 744                                 return -ENOMEM;
 745                         enic_queue_wq_desc_cont(wq, skb, dma_addr, len,
 746                                                 (len_left == 0) &&
 747                                                  (len == frag_len_left),/*EOP*/
 748                                                 loopback);
 749                         frag_len_left -= len;
 750                         offset += len;
 751                 }
 752         }
 753
 754 tso_out_stats:
 755         /* calculate how many packets tso sent */
 756         len = skb->len - hdr_len;
 757         pkts = len / mss;
 758         if ((len % mss) > 0)
 759                 pkts++;
 760         enic->wq[wq->index].stats.packets += pkts;
 761         enic->wq[wq->index].stats.bytes += (len + (pkts * hdr_len));
 762
 763         return 0;
 764 }
 765
 766 static inline int enic_queue_wq_skb_encap(struct enic *enic, struct vnic_wq *wq,
 767                                           struct sk_buff *skb,
 768                                           int vlan_tag_insert,
 769                                           unsigned int vlan_tag, int loopback)
 770 {
 771         unsigned int head_len = skb_headlen(skb);
 772         unsigned int len_left = skb->len - head_len;
 773         /* Hardware will overwrite the checksum fields, calculating from
 774          * scratch and ignoring the value placed by software.
 775          * Offload mode = 00
 776          * mss[2], mss[1], mss[0] bits are set
 777          */
 778         unsigned int mss_or_csum = 7;
 779         int eop = (len_left == 0);
 780         dma_addr_t dma_addr;
 781         int err = 0;
 782
 783         dma_addr = dma_map_single(&enic->pdev->dev, skb->data, head_len,
 784                                   DMA_TO_DEVICE);
 785         if (unlikely(enic_dma_map_check(enic, dma_addr)))
 786                 return -ENOMEM;
 787
 788         enic_queue_wq_desc_ex(wq, skb, dma_addr, head_len, mss_or_csum, 0,
 789                               vlan_tag_insert, vlan_tag,
 790                               WQ_ENET_OFFLOAD_MODE_CSUM, eop, 1 /* SOP */, eop,
 791                               loopback);
 792         if (!eop)
 793                 err = enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
 794
 795         enic->wq[wq->index].stats.encap_csum++;
 796         enic->wq[wq->index].stats.packets++;
 797         enic->wq[wq->index].stats.bytes += skb->len;
 798
 799         return err;
 800 }
 801
 802 static inline int enic_queue_wq_skb(struct enic *enic,
 803         struct vnic_wq *wq, struct sk_buff *skb)
 804 {
 805         unsigned int mss = skb_shinfo(skb)->gso_size;
 806         unsigned int vlan_tag = 0;
 807         int vlan_tag_insert = 0;
 808         int loopback = 0;
 809         int err;
 810
 811         if (skb_vlan_tag_present(skb)) {
 812                 /* VLAN tag from trunking driver */
 813                 vlan_tag_insert = 1;
 814                 vlan_tag = skb_vlan_tag_get(skb);
 815                 enic->wq[wq->index].stats.add_vlan++;
 816         } else if (enic->loop_enable) {
 817                 vlan_tag = enic->loop_tag;
 818                 loopback = 1;
 819         }
 820
 821         if (mss)
 822                 err = enic_queue_wq_skb_tso(enic, wq, skb, mss,
 823                                             vlan_tag_insert, vlan_tag,
 824                                             loopback);
 825         else if (skb->encapsulation)
 826                 err = enic_queue_wq_skb_encap(enic, wq, skb, vlan_tag_insert,
 827                                               vlan_tag, loopback);
 828         else if (skb->ip_summed == CHECKSUM_PARTIAL)
 829                 err = enic_queue_wq_skb_csum_l4(enic, wq, skb, vlan_tag_insert,
 830                                                 vlan_tag, loopback);
 831         else
 832                 err = enic_queue_wq_skb_vlan(enic, wq, skb, vlan_tag_insert,
 833                                              vlan_tag, loopback);
 834         if (unlikely(err)) {
 835                 struct vnic_wq_buf *buf;
 836
 837                 buf = wq->to_use->prev;
 838                 /* while not EOP of previous pkt && queue not empty.
 839                  * For all non EOP bufs, os_buf is NULL.
 840                  */
 841                 while (!buf->os_buf && (buf->next != wq->to_clean)) {
 842                         enic_free_wq_buf(wq, buf);
 843                         wq->ring.desc_avail++;
 844                         buf = buf->prev;
 845                 }
 846                 wq->to_use = buf->next;
 847                 dev_kfree_skb(skb);
 848         }
 849         return err;
 850 }
 851
 852 /* netif_tx_lock held, process context with BHs disabled, or BH */
 853 static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb,
 854         struct net_device *netdev)
 855 {
 856         struct enic *enic = netdev_priv(netdev);
 857         struct vnic_wq *wq;
 858         unsigned int txq_map;
 859         struct netdev_queue *txq;
 860
 861         txq_map = skb_get_queue_mapping(skb) % enic->wq_count;
 862         wq = &enic->wq[txq_map].vwq;
 863
 864         if (skb->len <= 0) {
 865                 dev_kfree_skb_any(skb);
 866                 enic->wq[wq->index].stats.null_pkt++;
 867                 return NETDEV_TX_OK;
 868         }
 869
 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                 enic->wq[wq->index].stats.skb_linear_fail++;
 882                 return NETDEV_TX_OK;
 883         }
 884
 885         spin_lock(&enic->wq[txq_map].lock);
 886
 887         if (vnic_wq_desc_avail(wq) <
 888             skb_shinfo(skb)->nr_frags + ENIC_DESC_MAX_SPLITS) {
 889                 netif_tx_stop_queue(txq);
 890                 /* This is a hard error, log it */
 891                 netdev_err(netdev, "BUG! Tx ring full when queue awake!\n");
 892                 spin_unlock(&enic->wq[txq_map].lock);
 893                 enic->wq[wq->index].stats.desc_full_awake++;
 894                 return NETDEV_TX_BUSY;
 895         }
 896
 897         if (enic_queue_wq_skb(enic, wq, skb))
 898                 goto error;
 899
 900         if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS) {
 901                 netif_tx_stop_queue(txq);
 902                 enic->wq[wq->index].stats.stopped++;
 903         }
 904         skb_tx_timestamp(skb);
 905         if (!netdev_xmit_more() || netif_xmit_stopped(txq))
 906                 vnic_wq_doorbell(wq);
 907
 908 error:
 909         spin_unlock(&enic->wq[txq_map].lock);
 910
 911         return NETDEV_TX_OK;
 912 }
 913
 914 /* rcu_read_lock potentially held, nominally process context */
 915 static void enic_get_stats(struct net_device *netdev,
 916                            struct rtnl_link_stats64 *net_stats)
 917 {
 918         struct enic *enic = netdev_priv(netdev);
 919         struct vnic_stats *stats;
 920         u64 pkt_truncated = 0;
 921         u64 bad_fcs = 0;
 922         int err;
 923         int i;
 924
 925         err = enic_dev_stats_dump(enic, &stats);
 926         /* return only when dma_alloc_coherent fails in vnic_dev_stats_dump
 927          * For other failures, like devcmd failure, we return previously
 928          * recorded stats.
 929          */
 930         if (err == -ENOMEM)
 931                 return;
 932
 933         net_stats->tx_packets = stats->tx.tx_frames_ok;
 934         net_stats->tx_bytes = stats->tx.tx_bytes_ok;
 935         net_stats->tx_errors = stats->tx.tx_errors;
 936         net_stats->tx_dropped = stats->tx.tx_drops;
 937
 938         net_stats->rx_packets = stats->rx.rx_frames_ok;
 939         net_stats->rx_bytes = stats->rx.rx_bytes_ok;
 940         net_stats->rx_errors = stats->rx.rx_errors;
 941         net_stats->multicast = stats->rx.rx_multicast_frames_ok;
 942
 943         for (i = 0; i < enic->rq_count; i++) {
 944                 struct enic_rq_stats *rqs = &enic->rq[i].stats;
 945
 946                 if (!enic->rq[i].vrq.ctrl)
 947                         break;
 948                 pkt_truncated += rqs->pkt_truncated;
 949                 bad_fcs += rqs->bad_fcs;
 950         }
 951         net_stats->rx_over_errors = pkt_truncated;
 952         net_stats->rx_crc_errors = bad_fcs;
 953         net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop;
 954 }
 955
 956 static int enic_mc_sync(struct net_device *netdev, const u8 *mc_addr)
 957 {
 958         struct enic *enic = netdev_priv(netdev);
 959
 960         if (enic->mc_count == ENIC_MULTICAST_PERFECT_FILTERS) {
 961                 unsigned int mc_count = netdev_mc_count(netdev);
 962
 963                 netdev_warn(netdev, "Registering only %d out of %d multicast addresses\n",
 964                             ENIC_MULTICAST_PERFECT_FILTERS, mc_count);
 965
 966                 return -ENOSPC;
 967         }
 968
 969         enic_dev_add_addr(enic, mc_addr);
 970         enic->mc_count++;
 971
 972         return 0;
 973 }
 974
 975 static int enic_mc_unsync(struct net_device *netdev, const u8 *mc_addr)
 976 {
 977         struct enic *enic = netdev_priv(netdev);
 978
 979         enic_dev_del_addr(enic, mc_addr);
 980         enic->mc_count--;
 981
 982         return 0;
 983 }
 984
 985 static int enic_uc_sync(struct net_device *netdev, const u8 *uc_addr)
 986 {
 987         struct enic *enic = netdev_priv(netdev);
 988
 989         if (enic->uc_count == ENIC_UNICAST_PERFECT_FILTERS) {
 990                 unsigned int uc_count = netdev_uc_count(netdev);
 991
 992                 netdev_warn(netdev, "Registering only %d out of %d unicast addresses\n",
 993                             ENIC_UNICAST_PERFECT_FILTERS, uc_count);
 994
 995                 return -ENOSPC;
 996         }
 997
 998         enic_dev_add_addr(enic, uc_addr);
 999         enic->uc_count++;
1000
1001         return 0;
1002 }
1003
1004 static int enic_uc_unsync(struct net_device *netdev, const u8 *uc_addr)
1005 {
1006         struct enic *enic = netdev_priv(netdev);
1007
1008         enic_dev_del_addr(enic, uc_addr);
1009         enic->uc_count--;
1010
1011         return 0;
1012 }
1013
1014 void enic_reset_addr_lists(struct enic *enic)
1015 {
1016         struct net_device *netdev = enic->netdev;
1017
1018         __dev_uc_unsync(netdev, NULL);
1019         __dev_mc_unsync(netdev, NULL);
1020
1021         enic->mc_count = 0;
1022         enic->uc_count = 0;
1023         enic->flags = 0;
1024 }
1025
1026 static int enic_set_mac_addr(struct net_device *netdev, char *addr)
1027 {
1028         struct enic *enic = netdev_priv(netdev);
1029
1030         if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) {
1031                 if (!is_valid_ether_addr(addr) && !is_zero_ether_addr(addr))
1032                         return -EADDRNOTAVAIL;
1033         } else {
1034                 if (!is_valid_ether_addr(addr))
1035                         return -EADDRNOTAVAIL;
1036         }
1037
1038         eth_hw_addr_set(netdev, addr);
1039
1040         return 0;
1041 }
1042
1043 static int enic_set_mac_address_dynamic(struct net_device *netdev, void *p)
1044 {
1045         struct enic *enic = netdev_priv(netdev);
1046         struct sockaddr *saddr = p;
1047         char *addr = saddr->sa_data;
1048         int err;
1049
1050         if (netif_running(enic->netdev)) {
1051                 err = enic_dev_del_station_addr(enic);
1052                 if (err)
1053                         return err;
1054         }
1055
1056         err = enic_set_mac_addr(netdev, addr);
1057         if (err)
1058                 return err;
1059
1060         if (netif_running(enic->netdev)) {
1061                 err = enic_dev_add_station_addr(enic);
1062                 if (err)
1063                         return err;
1064         }
1065
1066         return err;
1067 }
1068
1069 static int enic_set_mac_address(struct net_device *netdev, void *p)
1070 {
1071         struct sockaddr *saddr = p;
1072         char *addr = saddr->sa_data;
1073         struct enic *enic = netdev_priv(netdev);
1074         int err;
1075
1076         err = enic_dev_del_station_addr(enic);
1077         if (err)
1078                 return err;
1079
1080         err = enic_set_mac_addr(netdev, addr);
1081         if (err)
1082                 return err;
1083
1084         return enic_dev_add_station_addr(enic);
1085 }
1086
1087 /* netif_tx_lock held, BHs disabled */
1088 static void enic_set_rx_mode(struct net_device *netdev)
1089 {
1090         struct enic *enic = netdev_priv(netdev);
1091         int directed = 1;
1092         int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0;
1093         int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0;
1094         int promisc = (netdev->flags & IFF_PROMISC) ||
1095                 netdev_uc_count(netdev) > ENIC_UNICAST_PERFECT_FILTERS;
1096         int allmulti = (netdev->flags & IFF_ALLMULTI) ||
1097                 netdev_mc_count(netdev) > ENIC_MULTICAST_PERFECT_FILTERS;
1098         unsigned int flags = netdev->flags |
1099                 (allmulti ? IFF_ALLMULTI : 0) |
1100                 (promisc ? IFF_PROMISC : 0);
1101
1102         if (enic->flags != flags) {
1103                 enic->flags = flags;
1104                 enic_dev_packet_filter(enic, directed,
1105                         multicast, broadcast, promisc, allmulti);
1106         }
1107
1108         if (!promisc) {
1109                 __dev_uc_sync(netdev, enic_uc_sync, enic_uc_unsync);
1110                 if (!allmulti)
1111                         __dev_mc_sync(netdev, enic_mc_sync, enic_mc_unsync);
1112         }
1113 }
1114
1115 /* netif_tx_lock held, BHs disabled */
1116 static void enic_tx_timeout(struct net_device *netdev, unsigned int txqueue)
1117 {
1118         struct enic *enic = netdev_priv(netdev);
1119         schedule_work(&enic->tx_hang_reset);
1120 }
1121
1122 static int enic_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
1123 {
1124         struct enic *enic = netdev_priv(netdev);
1125         struct enic_port_profile *pp;
1126         int err;
1127
1128         ENIC_PP_BY_INDEX(enic, vf, pp, &err);
1129         if (err)
1130                 return err;
1131
1132         if (is_valid_ether_addr(mac) || is_zero_ether_addr(mac)) {
1133                 if (vf == PORT_SELF_VF) {
1134                         memcpy(pp->vf_mac, mac, ETH_ALEN);
1135                         return 0;
1136                 } else {
1137                         /*
1138                          * For sriov vf's set the mac in hw
1139                          */
1140                         ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic,
1141                                 vnic_dev_set_mac_addr, mac);
1142                         return enic_dev_status_to_errno(err);
1143                 }
1144         } else
1145                 return -EINVAL;
1146 }
1147
1148 static int enic_set_vf_port(struct net_device *netdev, int vf,
1149         struct nlattr *port[])
1150 {
1151         static const u8 zero_addr[ETH_ALEN] = {};
1152         struct enic *enic = netdev_priv(netdev);
1153         struct enic_port_profile prev_pp;
1154         struct enic_port_profile *pp;
1155         int err = 0, restore_pp = 1;
1156
1157         ENIC_PP_BY_INDEX(enic, vf, pp, &err);
1158         if (err)
1159                 return err;
1160
1161         if (!port[IFLA_PORT_REQUEST])
1162                 return -EOPNOTSUPP;
1163
1164         memcpy(&prev_pp, pp, sizeof(*enic->pp));
1165         memset(pp, 0, sizeof(*enic->pp));
1166
1167         pp->set |= ENIC_SET_REQUEST;
1168         pp->request = nla_get_u8(port[IFLA_PORT_REQUEST]);
1169
1170         if (port[IFLA_PORT_PROFILE]) {
1171                 if (nla_len(port[IFLA_PORT_PROFILE]) != PORT_PROFILE_MAX) {
1172                         memcpy(pp, &prev_pp, sizeof(*pp));
1173                         return -EINVAL;
1174                 }
1175                 pp->set |= ENIC_SET_NAME;
1176                 memcpy(pp->name, nla_data(port[IFLA_PORT_PROFILE]),
1177                         PORT_PROFILE_MAX);
1178         }
1179
1180         if (port[IFLA_PORT_INSTANCE_UUID]) {
1181                 if (nla_len(port[IFLA_PORT_INSTANCE_UUID]) != PORT_UUID_MAX) {
1182                         memcpy(pp, &prev_pp, sizeof(*pp));
1183                         return -EINVAL;
1184                 }
1185                 pp->set |= ENIC_SET_INSTANCE;
1186                 memcpy(pp->instance_uuid,
1187                         nla_data(port[IFLA_PORT_INSTANCE_UUID]), PORT_UUID_MAX);
1188         }
1189
1190         if (port[IFLA_PORT_HOST_UUID]) {
1191                 if (nla_len(port[IFLA_PORT_HOST_UUID]) != PORT_UUID_MAX) {
1192                         memcpy(pp, &prev_pp, sizeof(*pp));
1193                         return -EINVAL;
1194                 }
1195                 pp->set |= ENIC_SET_HOST;
1196                 memcpy(pp->host_uuid,
1197                         nla_data(port[IFLA_PORT_HOST_UUID]), PORT_UUID_MAX);
1198         }
1199
1200         if (vf == PORT_SELF_VF) {
1201                 /* Special case handling: mac came from IFLA_VF_MAC */
1202                 if (!is_zero_ether_addr(prev_pp.vf_mac))
1203                         memcpy(pp->mac_addr, prev_pp.vf_mac, ETH_ALEN);
1204
1205                 if (is_zero_ether_addr(netdev->dev_addr))
1206                         eth_hw_addr_random(netdev);
1207         } else {
1208                 /* SR-IOV VF: get mac from adapter */
1209                 ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic,
1210                         vnic_dev_get_mac_addr, pp->mac_addr);
1211                 if (err) {
1212                         netdev_err(netdev, "Error getting mac for vf %d\n", vf);
1213                         memcpy(pp, &prev_pp, sizeof(*pp));
1214                         return enic_dev_status_to_errno(err);
1215                 }
1216         }
1217
1218         err = enic_process_set_pp_request(enic, vf, &prev_pp, &restore_pp);
1219         if (err) {
1220                 if (restore_pp) {
1221                         /* Things are still the way they were: Implicit
1222                          * DISASSOCIATE failed
1223                          */
1224                         memcpy(pp, &prev_pp, sizeof(*pp));
1225                 } else {
1226                         memset(pp, 0, sizeof(*pp));
1227                         if (vf == PORT_SELF_VF)
1228                                 eth_hw_addr_set(netdev, zero_addr);
1229                 }
1230         } else {
1231                 /* Set flag to indicate that the port assoc/disassoc
1232                  * request has been sent out to fw
1233                  */
1234                 pp->set |= ENIC_PORT_REQUEST_APPLIED;
1235
1236                 /* If DISASSOCIATE, clean up all assigned/saved macaddresses */
1237                 if (pp->request == PORT_REQUEST_DISASSOCIATE) {
1238                         eth_zero_addr(pp->mac_addr);
1239                         if (vf == PORT_SELF_VF)
1240                                 eth_hw_addr_set(netdev, zero_addr);
1241                 }
1242         }
1243
1244         if (vf == PORT_SELF_VF)
1245                 eth_zero_addr(pp->vf_mac);
1246
1247         return err;
1248 }
1249
1250 static int enic_get_vf_port(struct net_device *netdev, int vf,
1251         struct sk_buff *skb)
1252 {
1253         struct enic *enic = netdev_priv(netdev);
1254         u16 response = PORT_PROFILE_RESPONSE_SUCCESS;
1255         struct enic_port_profile *pp;
1256         int err;
1257
1258         ENIC_PP_BY_INDEX(enic, vf, pp, &err);
1259         if (err)
1260                 return err;
1261
1262         if (!(pp->set & ENIC_PORT_REQUEST_APPLIED))
1263                 return -ENODATA;
1264
1265         err = enic_process_get_pp_request(enic, vf, pp->request, &response);
1266         if (err)
1267                 return err;
1268
1269         if (nla_put_u16(skb, IFLA_PORT_REQUEST, pp->request) ||
1270             nla_put_u16(skb, IFLA_PORT_RESPONSE, response) ||
1271             ((pp->set & ENIC_SET_NAME) &&
1272              nla_put(skb, IFLA_PORT_PROFILE, PORT_PROFILE_MAX, pp->name)) ||
1273             ((pp->set & ENIC_SET_INSTANCE) &&
1274              nla_put(skb, IFLA_PORT_INSTANCE_UUID, PORT_UUID_MAX,
1275                      pp->instance_uuid)) ||
1276             ((pp->set & ENIC_SET_HOST) &&
1277              nla_put(skb, IFLA_PORT_HOST_UUID, PORT_UUID_MAX, pp->host_uuid)))
1278                 goto nla_put_failure;
1279         return 0;
1280
1281 nla_put_failure:
1282         return -EMSGSIZE;
1283 }
1284
1285 static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
1286 {
1287         struct enic *enic = vnic_dev_priv(rq->vdev);
1288
1289         if (!buf->os_buf)
1290                 return;
1291
1292         dma_unmap_single(&enic->pdev->dev, buf->dma_addr, buf->len,
1293                          DMA_FROM_DEVICE);
1294         dev_kfree_skb_any(buf->os_buf);
1295         buf->os_buf = NULL;
1296 }
1297
1298 static int enic_rq_alloc_buf(struct vnic_rq *rq)
1299 {
1300         struct enic *enic = vnic_dev_priv(rq->vdev);
1301         struct net_device *netdev = enic->netdev;
1302         struct sk_buff *skb;
1303         unsigned int len = netdev->mtu + VLAN_ETH_HLEN;
1304         unsigned int os_buf_index = 0;
1305         dma_addr_t dma_addr;
1306         struct vnic_rq_buf *buf = rq->to_use;
1307
1308         if (buf->os_buf) {
1309                 enic_queue_rq_desc(rq, buf->os_buf, os_buf_index, buf->dma_addr,
1310                                    buf->len);
1311
1312                 return 0;
1313         }
1314         skb = netdev_alloc_skb_ip_align(netdev, len);
1315         if (!skb) {
1316                 enic->rq[rq->index].stats.no_skb++;
1317                 return -ENOMEM;
1318         }
1319
1320         dma_addr = dma_map_single(&enic->pdev->dev, skb->data, len,
1321                                   DMA_FROM_DEVICE);
1322         if (unlikely(enic_dma_map_check(enic, dma_addr))) {
1323                 dev_kfree_skb(skb);
1324                 return -ENOMEM;
1325         }
1326
1327         enic_queue_rq_desc(rq, skb, os_buf_index,
1328                 dma_addr, len);
1329
1330         return 0;
1331 }
1332
1333 static void enic_intr_update_pkt_size(struct vnic_rx_bytes_counter *pkt_size,
1334                                       u32 pkt_len)
1335 {
1336         if (ENIC_LARGE_PKT_THRESHOLD <= pkt_len)
1337                 pkt_size->large_pkt_bytes_cnt += pkt_len;
1338         else
1339                 pkt_size->small_pkt_bytes_cnt += pkt_len;
1340 }
1341
1342 static bool enic_rxcopybreak(struct net_device *netdev, struct sk_buff **skb,
1343                              struct vnic_rq_buf *buf, u16 len)
1344 {
1345         struct enic *enic = netdev_priv(netdev);
1346         struct sk_buff *new_skb;
1347
1348         if (len > enic->rx_copybreak)
1349                 return false;
1350         new_skb = netdev_alloc_skb_ip_align(netdev, len);
1351         if (!new_skb)
1352                 return false;
1353         dma_sync_single_for_cpu(&enic->pdev->dev, buf->dma_addr, len,
1354                                 DMA_FROM_DEVICE);
1355         memcpy(new_skb->data, (*skb)->data, len);
1356         *skb = new_skb;
1357
1358         return true;
1359 }
1360
1361 static void enic_rq_indicate_buf(struct vnic_rq *rq,
1362         struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
1363         int skipped, void *opaque)
1364 {
1365         struct enic *enic = vnic_dev_priv(rq->vdev);
1366         struct net_device *netdev = enic->netdev;
1367         struct sk_buff *skb;
1368         struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)];
1369         struct enic_rq_stats *rqstats = &enic->rq[rq->index].stats;
1370
1371         u8 type, color, eop, sop, ingress_port, vlan_stripped;
1372         u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
1373         u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
1374         u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
1375         u8 packet_error;
1376         u16 q_number, completed_index, bytes_written, vlan_tci, checksum;
1377         u32 rss_hash;
1378         bool outer_csum_ok = true, encap = false;
1379
1380         rqstats->packets++;
1381         if (skipped) {
1382                 rqstats->desc_skip++;
1383                 return;
1384         }
1385
1386         skb = buf->os_buf;
1387
1388         cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
1389                 &type, &color, &q_number, &completed_index,
1390                 &ingress_port, &fcoe, &eop, &sop, &rss_type,
1391                 &csum_not_calc, &rss_hash, &bytes_written,
1392                 &packet_error, &vlan_stripped, &vlan_tci, &checksum,
1393                 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
1394                 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
1395                 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
1396                 &fcs_ok);
1397
1398         if (packet_error) {
1399
1400                 if (!fcs_ok) {
1401                         if (bytes_written > 0)
1402                                 rqstats->bad_fcs++;
1403                         else if (bytes_written == 0)
1404                                 rqstats->pkt_truncated++;
1405                 }
1406
1407                 dma_unmap_single(&enic->pdev->dev, buf->dma_addr, buf->len,
1408                                  DMA_FROM_DEVICE);
1409                 dev_kfree_skb_any(skb);
1410                 buf->os_buf = NULL;
1411
1412                 return;
1413         }
1414
1415         if (eop && bytes_written > 0) {
1416
1417                 /* Good receive
1418                  */
1419                 rqstats->bytes += bytes_written;
1420                 if (!enic_rxcopybreak(netdev, &skb, buf, bytes_written)) {
1421                         buf->os_buf = NULL;
1422                         dma_unmap_single(&enic->pdev->dev, buf->dma_addr,
1423                                          buf->len, DMA_FROM_DEVICE);
1424                 }
1425                 prefetch(skb->data - NET_IP_ALIGN);
1426
1427                 skb_put(skb, bytes_written);
1428                 skb->protocol = eth_type_trans(skb, netdev);
1429                 skb_record_rx_queue(skb, q_number);
1430                 if ((netdev->features & NETIF_F_RXHASH) && rss_hash &&
1431                     (type == 3)) {
1432                         switch (rss_type) {
1433                         case CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv4:
1434                         case CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv6:
1435                         case CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv6_EX:
1436                                 skb_set_hash(skb, rss_hash, PKT_HASH_TYPE_L4);
1437                                 rqstats->l4_rss_hash++;
1438                                 break;
1439                         case CQ_ENET_RQ_DESC_RSS_TYPE_IPv4:
1440                         case CQ_ENET_RQ_DESC_RSS_TYPE_IPv6:
1441                         case CQ_ENET_RQ_DESC_RSS_TYPE_IPv6_EX:
1442                                 skb_set_hash(skb, rss_hash, PKT_HASH_TYPE_L3);
1443                                 rqstats->l3_rss_hash++;
1444                                 break;
1445                         }
1446                 }
1447                 if (enic->vxlan.vxlan_udp_port_number) {
1448                         switch (enic->vxlan.patch_level) {
1449                         case 0:
1450                                 if (fcoe) {
1451                                         encap = true;
1452                                         outer_csum_ok = fcoe_fc_crc_ok;
1453                                 }
1454                                 break;
1455                         case 2:
1456                                 if ((type == 7) &&
1457                                     (rss_hash & BIT(0))) {
1458                                         encap = true;
1459                                         outer_csum_ok = (rss_hash & BIT(1)) &&
1460                                                         (rss_hash & BIT(2));
1461                                 }
1462                                 break;
1463                         }
1464                 }
1465
1466                 /* Hardware does not provide whole packet checksum. It only
1467                  * provides pseudo checksum. Since hw validates the packet
1468                  * checksum but not provide us the checksum value. use
1469                  * CHECSUM_UNNECESSARY.
1470                  *
1471                  * In case of encap pkt tcp_udp_csum_ok/tcp_udp_csum_ok is
1472                  * inner csum_ok. outer_csum_ok is set by hw when outer udp
1473                  * csum is correct or is zero.
1474                  */
1475                 if ((netdev->features & NETIF_F_RXCSUM) && !csum_not_calc &&
1476                     tcp_udp_csum_ok && outer_csum_ok &&
1477                     (ipv4_csum_ok || ipv6)) {
1478                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1479                         skb->csum_level = encap;
1480                         if (encap)
1481                                 rqstats->csum_unnecessary_encap++;
1482                         else
1483                                 rqstats->csum_unnecessary++;
1484                 }
1485
1486                 if (vlan_stripped) {
1487                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tci);
1488                         rqstats->vlan_stripped++;
1489                 }
1490                 skb_mark_napi_id(skb, &enic->napi[rq->index]);
1491                 if (!(netdev->features & NETIF_F_GRO))
1492                         netif_receive_skb(skb);
1493                 else
1494                         napi_gro_receive(&enic->napi[q_number], skb);
1495                 if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
1496                         enic_intr_update_pkt_size(&cq->pkt_size_counter,
1497                                                   bytes_written);
1498         } else {
1499
1500                 /* Buffer overflow
1501                  */
1502                 rqstats->pkt_truncated++;
1503                 dma_unmap_single(&enic->pdev->dev, buf->dma_addr, buf->len,
1504                                  DMA_FROM_DEVICE);
1505                 dev_kfree_skb_any(skb);
1506                 buf->os_buf = NULL;
1507         }
1508 }
1509
1510 static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
1511         u8 type, u16 q_number, u16 completed_index, void *opaque)
1512 {
1513         struct enic *enic = vnic_dev_priv(vdev);
1514
1515         vnic_rq_service(&enic->rq[q_number].vrq, cq_desc,
1516                 completed_index, VNIC_RQ_RETURN_DESC,
1517                 enic_rq_indicate_buf, opaque);
1518
1519         return 0;
1520 }
1521
1522 static void enic_set_int_moderation(struct enic *enic, struct vnic_rq *rq)
1523 {
1524         unsigned int intr = enic_msix_rq_intr(enic, rq->index);
1525         struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)];
1526         u32 timer = cq->tobe_rx_coal_timeval;
1527
1528         if (cq->tobe_rx_coal_timeval != cq->cur_rx_coal_timeval) {
1529                 vnic_intr_coalescing_timer_set(&enic->intr[intr], timer);
1530                 cq->cur_rx_coal_timeval = cq->tobe_rx_coal_timeval;
1531         }
1532 }
1533
1534 static void enic_calc_int_moderation(struct enic *enic, struct vnic_rq *rq)
1535 {
1536         struct enic_rx_coal *rx_coal = &enic->rx_coalesce_setting;
1537         struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)];
1538         struct vnic_rx_bytes_counter *pkt_size_counter = &cq->pkt_size_counter;
1539         int index;
1540         u32 timer;
1541         u32 range_start;
1542         u32 traffic;
1543         u64 delta;
1544         ktime_t now = ktime_get();
1545
1546         delta = ktime_us_delta(now, cq->prev_ts);
1547         if (delta < ENIC_AIC_TS_BREAK)
1548                 return;
1549         cq->prev_ts = now;
1550
1551         traffic = pkt_size_counter->large_pkt_bytes_cnt +
1552                   pkt_size_counter->small_pkt_bytes_cnt;
1553         /* The table takes Mbps
1554          * traffic *= 8    => bits
1555          * traffic *= (10^6 / delta)    => bps
1556          * traffic /= 10^6     => Mbps
1557          *
1558          * Combining, traffic *= (8 / delta)
1559          */
1560
1561         traffic <<= 3;
1562         traffic = delta > UINT_MAX ? 0 : traffic / (u32)delta;
1563
1564         for (index = 0; index < ENIC_MAX_COALESCE_TIMERS; index++)
1565                 if (traffic < mod_table[index].rx_rate)
1566                         break;
1567         range_start = (pkt_size_counter->small_pkt_bytes_cnt >
1568                        pkt_size_counter->large_pkt_bytes_cnt << 1) ?
1569                       rx_coal->small_pkt_range_start :
1570                       rx_coal->large_pkt_range_start;
1571         timer = range_start + ((rx_coal->range_end - range_start) *
1572                                mod_table[index].range_percent / 100);
1573         /* Damping */
1574         cq->tobe_rx_coal_timeval = (timer + cq->tobe_rx_coal_timeval) >> 1;
1575
1576         pkt_size_counter->large_pkt_bytes_cnt = 0;
1577         pkt_size_counter->small_pkt_bytes_cnt = 0;
1578 }
1579
1580 static int enic_poll(struct napi_struct *napi, int budget)
1581 {
1582         struct net_device *netdev = napi->dev;
1583         struct enic *enic = netdev_priv(netdev);
1584         unsigned int cq_rq = enic_cq_rq(enic, 0);
1585         unsigned int cq_wq = enic_cq_wq(enic, 0);
1586         unsigned int intr = ENIC_LEGACY_IO_INTR;
1587         unsigned int rq_work_to_do = budget;
1588         unsigned int wq_work_to_do = ENIC_WQ_NAPI_BUDGET;
1589         unsigned int  work_done, rq_work_done = 0, wq_work_done;
1590         int err;
1591
1592         wq_work_done = vnic_cq_service(&enic->cq[cq_wq], wq_work_to_do,
1593                                        enic_wq_service, NULL);
1594
1595         if (budget > 0)
1596                 rq_work_done = vnic_cq_service(&enic->cq[cq_rq],
1597                         rq_work_to_do, enic_rq_service, NULL);
1598
1599         /* Accumulate intr event credits for this polling
1600          * cycle.  An intr event is the completion of a
1601          * a WQ or RQ packet.
1602          */
1603
1604         work_done = rq_work_done + wq_work_done;
1605
1606         if (work_done > 0)
1607                 vnic_intr_return_credits(&enic->intr[intr],
1608                         work_done,
1609                         0 /* don't unmask intr */,
1610                         0 /* don't reset intr timer */);
1611
1612         err = vnic_rq_fill(&enic->rq[0].vrq, enic_rq_alloc_buf);
1613
1614         /* Buffer allocation failed. Stay in polling
1615          * mode so we can try to fill the ring again.
1616          */
1617
1618         if (err)
1619                 rq_work_done = rq_work_to_do;
1620         if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
1621                 /* Call the function which refreshes the intr coalescing timer
1622                  * value based on the traffic.
1623                  */
1624                 enic_calc_int_moderation(enic, &enic->rq[0].vrq);
1625
1626         if ((rq_work_done < budget) && napi_complete_done(napi, rq_work_done)) {
1627
1628                 /* Some work done, but not enough to stay in polling,
1629                  * exit polling
1630                  */
1631
1632                 if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
1633                         enic_set_int_moderation(enic, &enic->rq[0].vrq);
1634                 vnic_intr_unmask(&enic->intr[intr]);
1635                 enic->rq[0].stats.napi_complete++;
1636         } else {
1637                 enic->rq[0].stats.napi_repoll++;
1638         }
1639
1640         return rq_work_done;
1641 }
1642
1643 #ifdef CONFIG_RFS_ACCEL
1644 static void enic_free_rx_cpu_rmap(struct enic *enic)
1645 {
1646         free_irq_cpu_rmap(enic->netdev->rx_cpu_rmap);
1647         enic->netdev->rx_cpu_rmap = NULL;
1648 }
1649
1650 static void enic_set_rx_cpu_rmap(struct enic *enic)
1651 {
1652         int i, res;
1653
1654         if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) {
1655                 enic->netdev->rx_cpu_rmap = alloc_irq_cpu_rmap(enic->rq_count);
1656                 if (unlikely(!enic->netdev->rx_cpu_rmap))
1657                         return;
1658                 for (i = 0; i < enic->rq_count; i++) {
1659                         res = irq_cpu_rmap_add(enic->netdev->rx_cpu_rmap,
1660                                                enic->msix_entry[i].vector);
1661                         if (unlikely(res)) {
1662                                 enic_free_rx_cpu_rmap(enic);
1663                                 return;
1664                         }
1665                 }
1666         }
1667 }
1668
1669 #else
1670
1671 static void enic_free_rx_cpu_rmap(struct enic *enic)
1672 {
1673 }
1674
1675 static void enic_set_rx_cpu_rmap(struct enic *enic)
1676 {
1677 }
1678
1679 #endif /* CONFIG_RFS_ACCEL */
1680
1681 static int enic_poll_msix_wq(struct napi_struct *napi, int budget)
1682 {
1683         struct net_device *netdev = napi->dev;
1684         struct enic *enic = netdev_priv(netdev);
1685         unsigned int wq_index = (napi - &enic->napi[0]) - enic->rq_count;
1686         struct vnic_wq *wq = &enic->wq[wq_index].vwq;
1687         unsigned int cq;
1688         unsigned int intr;
1689         unsigned int wq_work_to_do = ENIC_WQ_NAPI_BUDGET;
1690         unsigned int wq_work_done;
1691         unsigned int wq_irq;
1692
1693         wq_irq = wq->index;
1694         cq = enic_cq_wq(enic, wq_irq);
1695         intr = enic_msix_wq_intr(enic, wq_irq);
1696         wq_work_done = vnic_cq_service(&enic->cq[cq], wq_work_to_do,
1697                                        enic_wq_service, NULL);
1698
1699         vnic_intr_return_credits(&enic->intr[intr], wq_work_done,
1700                                  0 /* don't unmask intr */,
1701                                  1 /* reset intr timer */);
1702         if (!wq_work_done) {
1703                 napi_complete(napi);
1704                 vnic_intr_unmask(&enic->intr[intr]);
1705                 return 0;
1706         }
1707
1708         return budget;
1709 }
1710
1711 static int enic_poll_msix_rq(struct napi_struct *napi, int budget)
1712 {
1713         struct net_device *netdev = napi->dev;
1714         struct enic *enic = netdev_priv(netdev);
1715         unsigned int rq = (napi - &enic->napi[0]);
1716         unsigned int cq = enic_cq_rq(enic, rq);
1717         unsigned int intr = enic_msix_rq_intr(enic, rq);
1718         unsigned int work_to_do = budget;
1719         unsigned int work_done = 0;
1720         int err;
1721
1722         /* Service RQ
1723          */
1724
1725         if (budget > 0)
1726                 work_done = vnic_cq_service(&enic->cq[cq],
1727                         work_to_do, enic_rq_service, NULL);
1728
1729         /* Return intr event credits for this polling
1730          * cycle.  An intr event is the completion of a
1731          * RQ packet.
1732          */
1733
1734         if (work_done > 0)
1735                 vnic_intr_return_credits(&enic->intr[intr],
1736                         work_done,
1737                         0 /* don't unmask intr */,
1738                         0 /* don't reset intr timer */);
1739
1740         err = vnic_rq_fill(&enic->rq[rq].vrq, enic_rq_alloc_buf);
1741
1742         /* Buffer allocation failed. Stay in polling mode
1743          * so we can try to fill the ring again.
1744          */
1745
1746         if (err)
1747                 work_done = work_to_do;
1748         if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
1749                 /* Call the function which refreshes the intr coalescing timer
1750                  * value based on the traffic.
1751                  */
1752                 enic_calc_int_moderation(enic, &enic->rq[rq].vrq);
1753
1754         if ((work_done < budget) && napi_complete_done(napi, work_done)) {
1755
1756                 /* Some work done, but not enough to stay in polling,
1757                  * exit polling
1758                  */
1759
1760                 if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
1761                         enic_set_int_moderation(enic, &enic->rq[rq].vrq);
1762                 vnic_intr_unmask(&enic->intr[intr]);
1763                 enic->rq[rq].stats.napi_complete++;
1764         } else {
1765                 enic->rq[rq].stats.napi_repoll++;
1766         }
1767
1768         return work_done;
1769 }
1770
1771 static void enic_notify_timer(struct timer_list *t)
1772 {
1773         struct enic *enic = from_timer(enic, t, notify_timer);
1774
1775         enic_notify_check(enic);
1776
1777         mod_timer(&enic->notify_timer,
1778                 round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD));
1779 }
1780
1781 static void enic_free_intr(struct enic *enic)
1782 {
1783         struct net_device *netdev = enic->netdev;
1784         unsigned int i;
1785
1786         enic_free_rx_cpu_rmap(enic);
1787         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1788         case VNIC_DEV_INTR_MODE_INTX:
1789                 free_irq(enic->pdev->irq, netdev);
1790                 break;
1791         case VNIC_DEV_INTR_MODE_MSI:
1792                 free_irq(enic->pdev->irq, enic);
1793                 break;
1794         case VNIC_DEV_INTR_MODE_MSIX:
1795                 for (i = 0; i < enic->intr_count; i++)
1796                         if (enic->msix[i].requested)
1797                                 free_irq(enic->msix_entry[i].vector,
1798                                         enic->msix[i].devid);
1799                 break;
1800         default:
1801                 break;
1802         }
1803 }
1804
1805 static int enic_request_intr(struct enic *enic)
1806 {
1807         struct net_device *netdev = enic->netdev;
1808         unsigned int i, intr;
1809         int err = 0;
1810
1811         enic_set_rx_cpu_rmap(enic);
1812         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1813
1814         case VNIC_DEV_INTR_MODE_INTX:
1815
1816                 err = request_irq(enic->pdev->irq, enic_isr_legacy,
1817                         IRQF_SHARED, netdev->name, netdev);
1818                 break;
1819
1820         case VNIC_DEV_INTR_MODE_MSI:
1821
1822                 err = request_irq(enic->pdev->irq, enic_isr_msi,
1823                         0, netdev->name, enic);
1824                 break;
1825
1826         case VNIC_DEV_INTR_MODE_MSIX:
1827
1828                 for (i = 0; i < enic->rq_count; i++) {
1829                         intr = enic_msix_rq_intr(enic, i);
1830                         snprintf(enic->msix[intr].devname,
1831                                 sizeof(enic->msix[intr].devname),
1832                                 "%s-rx-%u", netdev->name, i);
1833                         enic->msix[intr].isr = enic_isr_msix;
1834                         enic->msix[intr].devid = &enic->napi[i];
1835                 }
1836
1837                 for (i = 0; i < enic->wq_count; i++) {
1838                         int wq = enic_cq_wq(enic, i);
1839
1840                         intr = enic_msix_wq_intr(enic, i);
1841                         snprintf(enic->msix[intr].devname,
1842                                 sizeof(enic->msix[intr].devname),
1843                                 "%s-tx-%u", netdev->name, i);
1844                         enic->msix[intr].isr = enic_isr_msix;
1845                         enic->msix[intr].devid = &enic->napi[wq];
1846                 }
1847
1848                 intr = enic_msix_err_intr(enic);
1849                 snprintf(enic->msix[intr].devname,
1850                         sizeof(enic->msix[intr].devname),
1851                         "%s-err", netdev->name);
1852                 enic->msix[intr].isr = enic_isr_msix_err;
1853                 enic->msix[intr].devid = enic;
1854
1855                 intr = enic_msix_notify_intr(enic);
1856                 snprintf(enic->msix[intr].devname,
1857                         sizeof(enic->msix[intr].devname),
1858                         "%s-notify", netdev->name);
1859                 enic->msix[intr].isr = enic_isr_msix_notify;
1860                 enic->msix[intr].devid = enic;
1861
1862                 for (i = 0; i < enic->intr_count; i++)
1863                         enic->msix[i].requested = 0;
1864
1865                 for (i = 0; i < enic->intr_count; i++) {
1866                         err = request_irq(enic->msix_entry[i].vector,
1867                                 enic->msix[i].isr, 0,
1868                                 enic->msix[i].devname,
1869                                 enic->msix[i].devid);
1870                         if (err) {
1871                                 enic_free_intr(enic);
1872                                 break;
1873                         }
1874                         enic->msix[i].requested = 1;
1875                 }
1876
1877                 break;
1878
1879         default:
1880                 break;
1881         }
1882
1883         return err;
1884 }
1885
1886 static void enic_synchronize_irqs(struct enic *enic)
1887 {
1888         unsigned int i;
1889
1890         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1891         case VNIC_DEV_INTR_MODE_INTX:
1892         case VNIC_DEV_INTR_MODE_MSI:
1893                 synchronize_irq(enic->pdev->irq);
1894                 break;
1895         case VNIC_DEV_INTR_MODE_MSIX:
1896                 for (i = 0; i < enic->intr_count; i++)
1897                         synchronize_irq(enic->msix_entry[i].vector);
1898                 break;
1899         default:
1900                 break;
1901         }
1902 }
1903
1904 static void enic_set_rx_coal_setting(struct enic *enic)
1905 {
1906         unsigned int speed;
1907         int index = -1;
1908         struct enic_rx_coal *rx_coal = &enic->rx_coalesce_setting;
1909
1910         /* 1. Read the link speed from fw
1911          * 2. Pick the default range for the speed
1912          * 3. Update it in enic->rx_coalesce_setting
1913          */
1914         speed = vnic_dev_port_speed(enic->vdev);
1915         if (ENIC_LINK_SPEED_10G < speed)
1916                 index = ENIC_LINK_40G_INDEX;
1917         else if (ENIC_LINK_SPEED_4G < speed)
1918                 index = ENIC_LINK_10G_INDEX;
1919         else
1920                 index = ENIC_LINK_4G_INDEX;
1921
1922         rx_coal->small_pkt_range_start = mod_range[index].small_pkt_range_start;
1923         rx_coal->large_pkt_range_start = mod_range[index].large_pkt_range_start;
1924         rx_coal->range_end = ENIC_RX_COALESCE_RANGE_END;
1925
1926         /* Start with the value provided by UCSM */
1927         for (index = 0; index < enic->rq_count; index++)
1928                 enic->cq[index].cur_rx_coal_timeval =
1929                                 enic->config.intr_timer_usec;
1930
1931         rx_coal->use_adaptive_rx_coalesce = 1;
1932 }
1933
1934 static int enic_dev_notify_set(struct enic *enic)
1935 {
1936         int err;
1937
1938         spin_lock_bh(&enic->devcmd_lock);
1939         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1940         case VNIC_DEV_INTR_MODE_INTX:
1941                 err = vnic_dev_notify_set(enic->vdev, ENIC_LEGACY_NOTIFY_INTR);
1942                 break;
1943         case VNIC_DEV_INTR_MODE_MSIX:
1944                 err = vnic_dev_notify_set(enic->vdev,
1945                         enic_msix_notify_intr(enic));
1946                 break;
1947         default:
1948                 err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */);
1949                 break;
1950         }
1951         spin_unlock_bh(&enic->devcmd_lock);
1952
1953         return err;
1954 }
1955
1956 static void enic_notify_timer_start(struct enic *enic)
1957 {
1958         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1959         case VNIC_DEV_INTR_MODE_MSI:
1960                 mod_timer(&enic->notify_timer, jiffies);
1961                 break;
1962         default:
1963                 /* Using intr for notification for INTx/MSI-X */
1964                 break;
1965         }
1966 }
1967
1968 /* rtnl lock is held, process context */
1969 static int enic_open(struct net_device *netdev)
1970 {
1971         struct enic *enic = netdev_priv(netdev);
1972         unsigned int i;
1973         int err, ret;
1974
1975         err = enic_request_intr(enic);
1976         if (err) {
1977                 netdev_err(netdev, "Unable to request irq.\n");
1978                 return err;
1979         }
1980         enic_init_affinity_hint(enic);
1981         enic_set_affinity_hint(enic);
1982
1983         err = enic_dev_notify_set(enic);
1984         if (err) {
1985                 netdev_err(netdev,
1986                         "Failed to alloc notify buffer, aborting.\n");
1987                 goto err_out_free_intr;
1988         }
1989
1990         for (i = 0; i < enic->rq_count; i++) {
1991                 /* enable rq before updating rq desc */
1992                 vnic_rq_enable(&enic->rq[i].vrq);
1993                 vnic_rq_fill(&enic->rq[i].vrq, enic_rq_alloc_buf);
1994                 /* Need at least one buffer on ring to get going */
1995                 if (vnic_rq_desc_used(&enic->rq[i].vrq) == 0) {
1996                         netdev_err(netdev, "Unable to alloc receive buffers\n");
1997                         err = -ENOMEM;
1998                         goto err_out_free_rq;
1999                 }
2000         }
2001
2002         for (i = 0; i < enic->wq_count; i++)
2003                 vnic_wq_enable(&enic->wq[i].vwq);
2004
2005         if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic))
2006                 enic_dev_add_station_addr(enic);
2007
2008         enic_set_rx_mode(netdev);
2009
2010         netif_tx_wake_all_queues(netdev);
2011
2012         for (i = 0; i < enic->rq_count; i++)
2013                 napi_enable(&enic->napi[i]);
2014
2015         if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX)
2016                 for (i = 0; i < enic->wq_count; i++)
2017                         napi_enable(&enic->napi[enic_cq_wq(enic, i)]);
2018         enic_dev_enable(enic);
2019
2020         for (i = 0; i < enic->intr_count; i++)
2021                 vnic_intr_unmask(&enic->intr[i]);
2022
2023         enic_notify_timer_start(enic);
2024         enic_rfs_timer_start(enic);
2025
2026         return 0;
2027
2028 err_out_free_rq:
2029         for (i = 0; i < enic->rq_count; i++) {
2030                 ret = vnic_rq_disable(&enic->rq[i].vrq);
2031                 if (!ret)
2032                         vnic_rq_clean(&enic->rq[i].vrq, enic_free_rq_buf);
2033         }
2034         enic_dev_notify_unset(enic);
2035 err_out_free_intr:
2036         enic_unset_affinity_hint(enic);
2037         enic_free_intr(enic);
2038
2039         return err;
2040 }
2041
2042 /* rtnl lock is held, process context */
2043 static int enic_stop(struct net_device *netdev)
2044 {
2045         struct enic *enic = netdev_priv(netdev);
2046         unsigned int i;
2047         int err;
2048
2049         for (i = 0; i < enic->intr_count; i++) {
2050                 vnic_intr_mask(&enic->intr[i]);
2051                 (void)vnic_intr_masked(&enic->intr[i]); /* flush write */
2052         }
2053
2054         enic_synchronize_irqs(enic);
2055
2056         del_timer_sync(&enic->notify_timer);
2057         enic_rfs_flw_tbl_free(enic);
2058
2059         enic_dev_disable(enic);
2060
2061         for (i = 0; i < enic->rq_count; i++)
2062                 napi_disable(&enic->napi[i]);
2063
2064         netif_carrier_off(netdev);
2065         if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX)
2066                 for (i = 0; i < enic->wq_count; i++)
2067                         napi_disable(&enic->napi[enic_cq_wq(enic, i)]);
2068         netif_tx_disable(netdev);
2069
2070         if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic))
2071                 enic_dev_del_station_addr(enic);
2072
2073         for (i = 0; i < enic->wq_count; i++) {
2074                 err = vnic_wq_disable(&enic->wq[i].vwq);
2075                 if (err)
2076                         return err;
2077         }
2078         for (i = 0; i < enic->rq_count; i++) {
2079                 err = vnic_rq_disable(&enic->rq[i].vrq);
2080                 if (err)
2081                         return err;
2082         }
2083
2084         enic_dev_notify_unset(enic);
2085         enic_unset_affinity_hint(enic);
2086         enic_free_intr(enic);
2087
2088         for (i = 0; i < enic->wq_count; i++)
2089                 vnic_wq_clean(&enic->wq[i].vwq, enic_free_wq_buf);
2090         for (i = 0; i < enic->rq_count; i++)
2091                 vnic_rq_clean(&enic->rq[i].vrq, enic_free_rq_buf);
2092         for (i = 0; i < enic->cq_count; i++)
2093                 vnic_cq_clean(&enic->cq[i]);
2094         for (i = 0; i < enic->intr_count; i++)
2095                 vnic_intr_clean(&enic->intr[i]);
2096
2097         return 0;
2098 }
2099
2100 static int _enic_change_mtu(struct net_device *netdev, int new_mtu)
2101 {
2102         bool running = netif_running(netdev);
2103         int err = 0;
2104
2105         ASSERT_RTNL();
2106         if (running) {
2107                 err = enic_stop(netdev);
2108                 if (err)
2109                         return err;
2110         }
2111
2112         WRITE_ONCE(netdev->mtu, new_mtu);
2113
2114         if (running) {
2115                 err = enic_open(netdev);
2116                 if (err)
2117                         return err;
2118         }
2119
2120         return 0;
2121 }
2122
2123 static int enic_change_mtu(struct net_device *netdev, int new_mtu)
2124 {
2125         struct enic *enic = netdev_priv(netdev);
2126
2127         if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic))
2128                 return -EOPNOTSUPP;
2129
2130         if (netdev->mtu > enic->port_mtu)
2131                 netdev_warn(netdev,
2132                             "interface MTU (%d) set higher than port MTU (%d)\n",
2133                             netdev->mtu, enic->port_mtu);
2134
2135         return _enic_change_mtu(netdev, new_mtu);
2136 }
2137
2138 static void enic_change_mtu_work(struct work_struct *work)
2139 {
2140         struct enic *enic = container_of(work, struct enic, change_mtu_work);
2141         struct net_device *netdev = enic->netdev;
2142         int new_mtu = vnic_dev_mtu(enic->vdev);
2143
2144         rtnl_lock();
2145         (void)_enic_change_mtu(netdev, new_mtu);
2146         rtnl_unlock();
2147
2148         netdev_info(netdev, "interface MTU set as %d\n", netdev->mtu);
2149 }
2150
2151 #ifdef CONFIG_NET_POLL_CONTROLLER
2152 static void enic_poll_controller(struct net_device *netdev)
2153 {
2154         struct enic *enic = netdev_priv(netdev);
2155         struct vnic_dev *vdev = enic->vdev;
2156         unsigned int i, intr;
2157
2158         switch (vnic_dev_get_intr_mode(vdev)) {
2159         case VNIC_DEV_INTR_MODE_MSIX:
2160                 for (i = 0; i < enic->rq_count; i++) {
2161                         intr = enic_msix_rq_intr(enic, i);
2162                         enic_isr_msix(enic->msix_entry[intr].vector,
2163                                       &enic->napi[i]);
2164                 }
2165
2166                 for (i = 0; i < enic->wq_count; i++) {
2167                         intr = enic_msix_wq_intr(enic, i);
2168                         enic_isr_msix(enic->msix_entry[intr].vector,
2169                                       &enic->napi[enic_cq_wq(enic, i)]);
2170                 }
2171
2172                 break;
2173         case VNIC_DEV_INTR_MODE_MSI:
2174                 enic_isr_msi(enic->pdev->irq, enic);
2175                 break;
2176         case VNIC_DEV_INTR_MODE_INTX:
2177                 enic_isr_legacy(enic->pdev->irq, netdev);
2178                 break;
2179         default:
2180                 break;
2181         }
2182 }
2183 #endif
2184
2185 static int enic_dev_wait(struct vnic_dev *vdev,
2186         int (*start)(struct vnic_dev *, int),
2187         int (*finished)(struct vnic_dev *, int *),
2188         int arg)
2189 {
2190         unsigned long time;
2191         int done;
2192         int err;
2193
2194         err = start(vdev, arg);
2195         if (err)
2196                 return err;
2197
2198         /* Wait for func to complete...2 seconds max
2199          */
2200
2201         time = jiffies + (HZ * 2);
2202         do {
2203
2204                 err = finished(vdev, &done);
2205                 if (err)
2206                         return err;
2207
2208                 if (done)
2209                         return 0;
2210
2211                 schedule_timeout_uninterruptible(HZ / 10);
2212
2213         } while (time_after(time, jiffies));
2214
2215         return -ETIMEDOUT;
2216 }
2217
2218 static int enic_dev_open(struct enic *enic)
2219 {
2220         int err;
2221         u32 flags = CMD_OPENF_IG_DESCCACHE;
2222
2223         err = enic_dev_wait(enic->vdev, vnic_dev_open,
2224                 vnic_dev_open_done, flags);
2225         if (err)
2226                 dev_err(enic_get_dev(enic), "vNIC device open failed, err %d\n",
2227                         err);
2228
2229         return err;
2230 }
2231
2232 static int enic_dev_soft_reset(struct enic *enic)
2233 {
2234         int err;
2235
2236         err = enic_dev_wait(enic->vdev, vnic_dev_soft_reset,
2237                             vnic_dev_soft_reset_done, 0);
2238         if (err)
2239                 netdev_err(enic->netdev, "vNIC soft reset failed, err %d\n",
2240                            err);
2241
2242         return err;
2243 }
2244
2245 static int enic_dev_hang_reset(struct enic *enic)
2246 {
2247         int err;
2248
2249         err = enic_dev_wait(enic->vdev, vnic_dev_hang_reset,
2250                 vnic_dev_hang_reset_done, 0);
2251         if (err)
2252                 netdev_err(enic->netdev, "vNIC hang reset failed, err %d\n",
2253                         err);
2254
2255         return err;
2256 }
2257
2258 int __enic_set_rsskey(struct enic *enic)
2259 {
2260         union vnic_rss_key *rss_key_buf_va;
2261         dma_addr_t rss_key_buf_pa;
2262         int i, kidx, bidx, err;
2263
2264         rss_key_buf_va = dma_alloc_coherent(&enic->pdev->dev,
2265                                             sizeof(union vnic_rss_key),
2266                                             &rss_key_buf_pa, GFP_ATOMIC);
2267         if (!rss_key_buf_va)
2268                 return -ENOMEM;
2269
2270         for (i = 0; i < ENIC_RSS_LEN; i++) {
2271                 kidx = i / ENIC_RSS_BYTES_PER_KEY;
2272                 bidx = i % ENIC_RSS_BYTES_PER_KEY;
2273                 rss_key_buf_va->key[kidx].b[bidx] = enic->rss_key[i];
2274         }
2275         spin_lock_bh(&enic->devcmd_lock);
2276         err = enic_set_rss_key(enic,
2277                 rss_key_buf_pa,
2278                 sizeof(union vnic_rss_key));
2279         spin_unlock_bh(&enic->devcmd_lock);
2280
2281         dma_free_coherent(&enic->pdev->dev, sizeof(union vnic_rss_key),
2282                           rss_key_buf_va, rss_key_buf_pa);
2283
2284         return err;
2285 }
2286
2287 static int enic_set_rsskey(struct enic *enic)
2288 {
2289         netdev_rss_key_fill(enic->rss_key, ENIC_RSS_LEN);
2290
2291         return __enic_set_rsskey(enic);
2292 }
2293
2294 static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits)
2295 {
2296         dma_addr_t rss_cpu_buf_pa;
2297         union vnic_rss_cpu *rss_cpu_buf_va = NULL;
2298         unsigned int i;
2299         int err;
2300
2301         rss_cpu_buf_va = dma_alloc_coherent(&enic->pdev->dev,
2302                                             sizeof(union vnic_rss_cpu),
2303                                             &rss_cpu_buf_pa, GFP_ATOMIC);
2304         if (!rss_cpu_buf_va)
2305                 return -ENOMEM;
2306
2307         for (i = 0; i < (1 << rss_hash_bits); i++)
2308                 (*rss_cpu_buf_va).cpu[i/4].b[i%4] = i % enic->rq_count;
2309
2310         spin_lock_bh(&enic->devcmd_lock);
2311         err = enic_set_rss_cpu(enic,
2312                 rss_cpu_buf_pa,
2313                 sizeof(union vnic_rss_cpu));
2314         spin_unlock_bh(&enic->devcmd_lock);
2315
2316         dma_free_coherent(&enic->pdev->dev, sizeof(union vnic_rss_cpu),
2317                           rss_cpu_buf_va, rss_cpu_buf_pa);
2318
2319         return err;
2320 }
2321
2322 static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu,
2323         u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable)
2324 {
2325         const u8 tso_ipid_split_en = 0;
2326         const u8 ig_vlan_strip_en = 1;
2327         int err;
2328
2329         /* Enable VLAN tag stripping.
2330         */
2331
2332         spin_lock_bh(&enic->devcmd_lock);
2333         err = enic_set_nic_cfg(enic,
2334                 rss_default_cpu, rss_hash_type,
2335                 rss_hash_bits, rss_base_cpu,
2336                 rss_enable, tso_ipid_split_en,
2337                 ig_vlan_strip_en);
2338         spin_unlock_bh(&enic->devcmd_lock);
2339
2340         return err;
2341 }
2342
2343 static int enic_set_rss_nic_cfg(struct enic *enic)
2344 {
2345         struct device *dev = enic_get_dev(enic);
2346         const u8 rss_default_cpu = 0;
2347         const u8 rss_hash_bits = 7;
2348         const u8 rss_base_cpu = 0;
2349         u8 rss_hash_type;
2350         int res;
2351         u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1);
2352
2353         spin_lock_bh(&enic->devcmd_lock);
2354         res = vnic_dev_capable_rss_hash_type(enic->vdev, &rss_hash_type);
2355         spin_unlock_bh(&enic->devcmd_lock);
2356         if (res) {
2357                 /* defaults for old adapters
2358                  */
2359                 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4      |
2360                                 NIC_CFG_RSS_HASH_TYPE_TCP_IPV4  |
2361                                 NIC_CFG_RSS_HASH_TYPE_IPV6      |
2362                                 NIC_CFG_RSS_HASH_TYPE_TCP_IPV6;
2363         }
2364
2365         if (rss_enable) {
2366                 if (!enic_set_rsskey(enic)) {
2367                         if (enic_set_rsscpu(enic, rss_hash_bits)) {
2368                                 rss_enable = 0;
2369                                 dev_warn(dev, "RSS disabled, "
2370                                         "Failed to set RSS cpu indirection table.");
2371                         }
2372                 } else {
2373                         rss_enable = 0;
2374                         dev_warn(dev, "RSS disabled, Failed to set RSS key.\n");
2375                 }
2376         }
2377
2378         return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type,
2379                 rss_hash_bits, rss_base_cpu, rss_enable);
2380 }
2381
2382 static void enic_set_api_busy(struct enic *enic, bool busy)
2383 {
2384         spin_lock(&enic->enic_api_lock);
2385         enic->enic_api_busy = busy;
2386         spin_unlock(&enic->enic_api_lock);
2387 }
2388
2389 static void enic_reset(struct work_struct *work)
2390 {
2391         struct enic *enic = container_of(work, struct enic, reset);
2392
2393         if (!netif_running(enic->netdev))
2394                 return;
2395
2396         rtnl_lock();
2397
2398         /* Stop any activity from infiniband */
2399         enic_set_api_busy(enic, true);
2400
2401         enic_stop(enic->netdev);
2402         enic_dev_soft_reset(enic);
2403         enic_reset_addr_lists(enic);
2404         enic_init_vnic_resources(enic);
2405         enic_set_rss_nic_cfg(enic);
2406         enic_dev_set_ig_vlan_rewrite_mode(enic);
2407         enic_open(enic->netdev);
2408
2409         /* Allow infiniband to fiddle with the device again */
2410         enic_set_api_busy(enic, false);
2411
2412         call_netdevice_notifiers(NETDEV_REBOOT, enic->netdev);
2413
2414         rtnl_unlock();
2415 }
2416
2417 static void enic_tx_hang_reset(struct work_struct *work)
2418 {
2419         struct enic *enic = container_of(work, struct enic, tx_hang_reset);
2420
2421         rtnl_lock();
2422
2423         /* Stop any activity from infiniband */
2424         enic_set_api_busy(enic, true);
2425
2426         enic_dev_hang_notify(enic);
2427         enic_stop(enic->netdev);
2428         enic_dev_hang_reset(enic);
2429         enic_reset_addr_lists(enic);
2430         enic_init_vnic_resources(enic);
2431         enic_set_rss_nic_cfg(enic);
2432         enic_dev_set_ig_vlan_rewrite_mode(enic);
2433         enic_open(enic->netdev);
2434
2435         /* Allow infiniband to fiddle with the device again */
2436         enic_set_api_busy(enic, false);
2437
2438         call_netdevice_notifiers(NETDEV_REBOOT, enic->netdev);
2439
2440         rtnl_unlock();
2441 }
2442
2443 static int enic_set_intr_mode(struct enic *enic)
2444 {
2445         unsigned int i;
2446         int num_intr;
2447
2448         /* Set interrupt mode (INTx, MSI, MSI-X) depending
2449          * on system capabilities.
2450          *
2451          * Try MSI-X first
2452          */
2453
2454         if (enic->config.intr_mode < 1 &&
2455             enic->intr_avail >= ENIC_MSIX_MIN_INTR) {
2456                 for (i = 0; i < enic->intr_avail; i++)
2457                         enic->msix_entry[i].entry = i;
2458
2459                 num_intr = pci_enable_msix_range(enic->pdev, enic->msix_entry,
2460                                                  ENIC_MSIX_MIN_INTR,
2461                                                  enic->intr_avail);
2462                 if (num_intr > 0) {
2463                         vnic_dev_set_intr_mode(enic->vdev,
2464                                                VNIC_DEV_INTR_MODE_MSIX);
2465                         enic->intr_avail = num_intr;
2466                         return 0;
2467                 }
2468         }
2469
2470         /* Next try MSI
2471          *
2472          * We need 1 INTR
2473          */
2474
2475         if (enic->config.intr_mode < 2 &&
2476             enic->intr_avail >= 1 &&
2477             !pci_enable_msi(enic->pdev)) {
2478                 enic->intr_avail = 1;
2479                 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI);
2480                 return 0;
2481         }
2482
2483         /* Next try INTx
2484          *
2485          * We need 3 INTRs
2486          * (the first INTR is used for WQ/RQ)
2487          * (the second INTR is used for WQ/RQ errors)
2488          * (the last INTR is used for notifications)
2489          */
2490
2491         if (enic->config.intr_mode < 3 &&
2492             enic->intr_avail >= 3) {
2493                 enic->intr_avail = 3;
2494                 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX);
2495                 return 0;
2496         }
2497
2498         vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2499
2500         return -EINVAL;
2501 }
2502
2503 static void enic_clear_intr_mode(struct enic *enic)
2504 {
2505         switch (vnic_dev_get_intr_mode(enic->vdev)) {
2506         case VNIC_DEV_INTR_MODE_MSIX:
2507                 pci_disable_msix(enic->pdev);
2508                 break;
2509         case VNIC_DEV_INTR_MODE_MSI:
2510                 pci_disable_msi(enic->pdev);
2511                 break;
2512         default:
2513                 break;
2514         }
2515
2516         vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2517 }
2518
2519 static int enic_adjust_resources(struct enic *enic)
2520 {
2521         unsigned int max_queues;
2522         unsigned int rq_default;
2523         unsigned int rq_avail;
2524         unsigned int wq_avail;
2525
2526         if (enic->rq_avail < 1 || enic->wq_avail < 1 || enic->cq_avail < 2) {
2527                 dev_err(enic_get_dev(enic),
2528                         "Not enough resources available rq: %d wq: %d cq: %d\n",
2529                         enic->rq_avail, enic->wq_avail,
2530                         enic->cq_avail);
2531                 return -ENOSPC;
2532         }
2533
2534         if (is_kdump_kernel()) {
2535                 dev_info(enic_get_dev(enic), "Running from within kdump kernel. Using minimal resources\n");
2536                 enic->rq_avail = 1;
2537                 enic->wq_avail = 1;
2538                 enic->config.rq_desc_count = ENIC_MIN_RQ_DESCS;
2539                 enic->config.wq_desc_count = ENIC_MIN_WQ_DESCS;
2540                 enic->config.mtu = min_t(u16, 1500, enic->config.mtu);
2541         }
2542
2543         /* if RSS isn't set, then we can only use one RQ */
2544         if (!ENIC_SETTING(enic, RSS))
2545                 enic->rq_avail = 1;
2546
2547         switch (vnic_dev_get_intr_mode(enic->vdev)) {
2548         case VNIC_DEV_INTR_MODE_INTX:
2549         case VNIC_DEV_INTR_MODE_MSI:
2550                 enic->rq_count = 1;
2551                 enic->wq_count = 1;
2552                 enic->cq_count = 2;
2553                 enic->intr_count = enic->intr_avail;
2554                 break;
2555         case VNIC_DEV_INTR_MODE_MSIX:
2556                 /* Adjust the number of wqs/rqs/cqs/interrupts that will be
2557                  * used based on which resource is the most constrained
2558                  */
2559                 wq_avail = min(enic->wq_avail, ENIC_WQ_MAX);
2560                 rq_default = netif_get_num_default_rss_queues();
2561                 rq_avail = min3(enic->rq_avail, ENIC_RQ_MAX, rq_default);
2562                 max_queues = min(enic->cq_avail,
2563                                  enic->intr_avail - ENIC_MSIX_RESERVED_INTR);
2564                 if (wq_avail + rq_avail <= max_queues) {
2565                         enic->rq_count = rq_avail;
2566                         enic->wq_count = wq_avail;
2567                 } else {
2568                         /* recalculate wq/rq count */
2569                         if (rq_avail < wq_avail) {
2570                                 enic->rq_count = min(rq_avail, max_queues / 2);
2571                                 enic->wq_count = max_queues - enic->rq_count;
2572                         } else {
2573                                 enic->wq_count = min(wq_avail, max_queues / 2);
2574                                 enic->rq_count = max_queues - enic->wq_count;
2575                         }
2576                 }
2577                 enic->cq_count = enic->rq_count + enic->wq_count;
2578                 enic->intr_count = enic->cq_count + ENIC_MSIX_RESERVED_INTR;
2579
2580                 break;
2581         default:
2582                 dev_err(enic_get_dev(enic), "Unknown interrupt mode\n");
2583                 return -EINVAL;
2584         }
2585
2586         return 0;
2587 }
2588
2589 static void enic_get_queue_stats_rx(struct net_device *dev, int idx,
2590                                     struct netdev_queue_stats_rx *rxs)
2591 {
2592         struct enic *enic = netdev_priv(dev);
2593         struct enic_rq_stats *rqstats = &enic->rq[idx].stats;
2594
2595         rxs->bytes = rqstats->bytes;
2596         rxs->packets = rqstats->packets;
2597         rxs->hw_drops = rqstats->bad_fcs + rqstats->pkt_truncated;
2598         rxs->hw_drop_overruns = rqstats->pkt_truncated;
2599         rxs->csum_unnecessary = rqstats->csum_unnecessary +
2600                                 rqstats->csum_unnecessary_encap;
2601 }
2602
2603 static void enic_get_queue_stats_tx(struct net_device *dev, int idx,
2604                                     struct netdev_queue_stats_tx *txs)
2605 {
2606         struct enic *enic = netdev_priv(dev);
2607         struct enic_wq_stats *wqstats = &enic->wq[idx].stats;
2608
2609         txs->bytes = wqstats->bytes;
2610         txs->packets = wqstats->packets;
2611         txs->csum_none = wqstats->csum_none;
2612         txs->needs_csum = wqstats->csum_partial + wqstats->encap_csum +
2613                           wqstats->tso;
2614         txs->hw_gso_packets = wqstats->tso;
2615         txs->stop = wqstats->stopped;
2616         txs->wake = wqstats->wake;
2617 }
2618
2619 static void enic_get_base_stats(struct net_device *dev,
2620                                 struct netdev_queue_stats_rx *rxs,
2621                                 struct netdev_queue_stats_tx *txs)
2622 {
2623         rxs->bytes = 0;
2624         rxs->packets = 0;
2625         rxs->hw_drops = 0;
2626         rxs->hw_drop_overruns = 0;
2627         rxs->csum_unnecessary = 0;
2628         txs->bytes = 0;
2629         txs->packets = 0;
2630         txs->csum_none = 0;
2631         txs->needs_csum = 0;
2632         txs->hw_gso_packets = 0;
2633         txs->stop = 0;
2634         txs->wake = 0;
2635 }
2636
2637 static const struct net_device_ops enic_netdev_dynamic_ops = {
2638         .ndo_open               = enic_open,
2639         .ndo_stop               = enic_stop,
2640         .ndo_start_xmit         = enic_hard_start_xmit,
2641         .ndo_get_stats64        = enic_get_stats,
2642         .ndo_validate_addr      = eth_validate_addr,
2643         .ndo_set_rx_mode        = enic_set_rx_mode,
2644         .ndo_set_mac_address    = enic_set_mac_address_dynamic,
2645         .ndo_change_mtu         = enic_change_mtu,
2646         .ndo_vlan_rx_add_vid    = enic_vlan_rx_add_vid,
2647         .ndo_vlan_rx_kill_vid   = enic_vlan_rx_kill_vid,
2648         .ndo_tx_timeout         = enic_tx_timeout,
2649         .ndo_set_vf_port        = enic_set_vf_port,
2650         .ndo_get_vf_port        = enic_get_vf_port,
2651         .ndo_set_vf_mac         = enic_set_vf_mac,
2652 #ifdef CONFIG_NET_POLL_CONTROLLER
2653         .ndo_poll_controller    = enic_poll_controller,
2654 #endif
2655 #ifdef CONFIG_RFS_ACCEL
2656         .ndo_rx_flow_steer      = enic_rx_flow_steer,
2657 #endif
2658         .ndo_features_check     = enic_features_check,
2659 };
2660
2661 static const struct net_device_ops enic_netdev_ops = {
2662         .ndo_open               = enic_open,
2663         .ndo_stop               = enic_stop,
2664         .ndo_start_xmit         = enic_hard_start_xmit,
2665         .ndo_get_stats64        = enic_get_stats,
2666         .ndo_validate_addr      = eth_validate_addr,
2667         .ndo_set_mac_address    = enic_set_mac_address,
2668         .ndo_set_rx_mode        = enic_set_rx_mode,
2669         .ndo_change_mtu         = enic_change_mtu,
2670         .ndo_vlan_rx_add_vid    = enic_vlan_rx_add_vid,
2671         .ndo_vlan_rx_kill_vid   = enic_vlan_rx_kill_vid,
2672         .ndo_tx_timeout         = enic_tx_timeout,
2673         .ndo_set_vf_port        = enic_set_vf_port,
2674         .ndo_get_vf_port        = enic_get_vf_port,
2675         .ndo_set_vf_mac         = enic_set_vf_mac,
2676 #ifdef CONFIG_NET_POLL_CONTROLLER
2677         .ndo_poll_controller    = enic_poll_controller,
2678 #endif
2679 #ifdef CONFIG_RFS_ACCEL
2680         .ndo_rx_flow_steer      = enic_rx_flow_steer,
2681 #endif
2682         .ndo_features_check     = enic_features_check,
2683 };
2684
2685 static const struct netdev_stat_ops enic_netdev_stat_ops = {
2686         .get_queue_stats_rx     = enic_get_queue_stats_rx,
2687         .get_queue_stats_tx     = enic_get_queue_stats_tx,
2688         .get_base_stats         = enic_get_base_stats,
2689 };
2690
2691 static void enic_free_enic_resources(struct enic *enic)
2692 {
2693         kfree(enic->wq);
2694         enic->wq = NULL;
2695
2696         kfree(enic->rq);
2697         enic->rq = NULL;
2698
2699         kfree(enic->cq);
2700         enic->cq = NULL;
2701
2702         kfree(enic->napi);
2703         enic->napi = NULL;
2704
2705         kfree(enic->msix_entry);
2706         enic->msix_entry = NULL;
2707
2708         kfree(enic->msix);
2709         enic->msix = NULL;
2710
2711         kfree(enic->intr);
2712         enic->intr = NULL;
2713 }
2714
2715 static int enic_alloc_enic_resources(struct enic *enic)
2716 {
2717         enic->wq = kcalloc(enic->wq_avail, sizeof(struct enic_wq), GFP_KERNEL);
2718         if (!enic->wq)
2719                 goto free_queues;
2720
2721         enic->rq = kcalloc(enic->rq_avail, sizeof(struct enic_rq), GFP_KERNEL);
2722         if (!enic->rq)
2723                 goto free_queues;
2724
2725         enic->cq = kcalloc(enic->cq_avail, sizeof(struct vnic_cq), GFP_KERNEL);
2726         if (!enic->cq)
2727                 goto free_queues;
2728
2729         enic->napi = kcalloc(enic->wq_avail + enic->rq_avail,
2730                              sizeof(struct napi_struct), GFP_KERNEL);
2731         if (!enic->napi)
2732                 goto free_queues;
2733
2734         enic->msix_entry = kcalloc(enic->intr_avail, sizeof(struct msix_entry),
2735                                    GFP_KERNEL);
2736         if (!enic->msix_entry)
2737                 goto free_queues;
2738
2739         enic->msix = kcalloc(enic->intr_avail, sizeof(struct enic_msix_entry),
2740                              GFP_KERNEL);
2741         if (!enic->msix)
2742                 goto free_queues;
2743
2744         enic->intr = kcalloc(enic->intr_avail, sizeof(struct vnic_intr),
2745                              GFP_KERNEL);
2746         if (!enic->intr)
2747                 goto free_queues;
2748
2749         return 0;
2750
2751 free_queues:
2752         enic_free_enic_resources(enic);
2753         return -ENOMEM;
2754 }
2755
2756 static void enic_dev_deinit(struct enic *enic)
2757 {
2758         unsigned int i;
2759
2760         for (i = 0; i < enic->rq_count; i++)
2761                 __netif_napi_del(&enic->napi[i]);
2762
2763         if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX)
2764                 for (i = 0; i < enic->wq_count; i++)
2765                         __netif_napi_del(&enic->napi[enic_cq_wq(enic, i)]);
2766
2767         /* observe RCU grace period after __netif_napi_del() calls */
2768         synchronize_net();
2769
2770         enic_free_vnic_resources(enic);
2771         enic_clear_intr_mode(enic);
2772         enic_free_affinity_hint(enic);
2773         enic_free_enic_resources(enic);
2774 }
2775
2776 static int enic_dev_init(struct enic *enic)
2777 {
2778         struct device *dev = enic_get_dev(enic);
2779         struct net_device *netdev = enic->netdev;
2780         unsigned int i;
2781         int err;
2782
2783         /* Get interrupt coalesce timer info */
2784         err = enic_dev_intr_coal_timer_info(enic);
2785         if (err) {
2786                 dev_warn(dev, "Using default conversion factor for "
2787                         "interrupt coalesce timer\n");
2788                 vnic_dev_intr_coal_timer_info_default(enic->vdev);
2789         }
2790
2791         /* Get vNIC configuration
2792          */
2793
2794         err = enic_get_vnic_config(enic);
2795         if (err) {
2796                 dev_err(dev, "Get vNIC configuration failed, aborting\n");
2797                 return err;
2798         }
2799
2800         /* Get available resource counts
2801          */
2802
2803         enic_get_res_counts(enic);
2804
2805         err = enic_alloc_enic_resources(enic);
2806         if (err) {
2807                 dev_err(dev, "Failed to allocate enic resources\n");
2808                 return err;
2809         }
2810
2811         /* Set interrupt mode based on system capabilities */
2812
2813         err = enic_set_intr_mode(enic);
2814         if (err) {
2815                 dev_err(dev, "Failed to set intr mode based on resource "
2816                         "counts and system capabilities, aborting\n");
2817                 goto err_out_free_vnic_resources;
2818         }
2819
2820         /* Adjust resource counts based on most constrained resources */
2821         err = enic_adjust_resources(enic);
2822         if (err) {
2823                 dev_err(dev, "Failed to adjust resources\n");
2824                 goto err_out_free_vnic_resources;
2825         }
2826
2827         /* Allocate and configure vNIC resources
2828          */
2829
2830         err = enic_alloc_vnic_resources(enic);
2831         if (err) {
2832                 dev_err(dev, "Failed to alloc vNIC resources, aborting\n");
2833                 goto err_out_free_vnic_resources;
2834         }
2835
2836         enic_init_vnic_resources(enic);
2837
2838         err = enic_set_rss_nic_cfg(enic);
2839         if (err) {
2840                 dev_err(dev, "Failed to config nic, aborting\n");
2841                 goto err_out_free_vnic_resources;
2842         }
2843
2844         switch (vnic_dev_get_intr_mode(enic->vdev)) {
2845         default:
2846                 netif_napi_add(netdev, &enic->napi[0], enic_poll);
2847                 break;
2848         case VNIC_DEV_INTR_MODE_MSIX:
2849                 for (i = 0; i < enic->rq_count; i++) {
2850                         netif_napi_add(netdev, &enic->napi[i],
2851                                        enic_poll_msix_rq);
2852                 }
2853                 for (i = 0; i < enic->wq_count; i++)
2854                         netif_napi_add(netdev,
2855                                        &enic->napi[enic_cq_wq(enic, i)],
2856                                        enic_poll_msix_wq);
2857                 break;
2858         }
2859
2860         return 0;
2861
2862 err_out_free_vnic_resources:
2863         enic_free_affinity_hint(enic);
2864         enic_clear_intr_mode(enic);
2865         enic_free_vnic_resources(enic);
2866         enic_free_enic_resources(enic);
2867
2868         return err;
2869 }
2870
2871 static void enic_iounmap(struct enic *enic)
2872 {
2873         unsigned int i;
2874
2875         for (i = 0; i < ARRAY_SIZE(enic->bar); i++)
2876                 if (enic->bar[i].vaddr)
2877                         iounmap(enic->bar[i].vaddr);
2878 }
2879
2880 static int enic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2881 {
2882         struct device *dev = &pdev->dev;
2883         struct net_device *netdev;
2884         struct enic *enic;
2885         int using_dac = 0;
2886         unsigned int i;
2887         int err;
2888 #ifdef CONFIG_PCI_IOV
2889         int pos = 0;
2890 #endif
2891         int num_pps = 1;
2892
2893         /* Allocate net device structure and initialize.  Private
2894          * instance data is initialized to zero.
2895          */
2896
2897         netdev = alloc_etherdev_mqs(sizeof(struct enic),
2898                                     ENIC_RQ_MAX, ENIC_WQ_MAX);
2899         if (!netdev)
2900                 return -ENOMEM;
2901
2902         pci_set_drvdata(pdev, netdev);
2903
2904         SET_NETDEV_DEV(netdev, &pdev->dev);
2905
2906         enic = netdev_priv(netdev);
2907         enic->netdev = netdev;
2908         enic->pdev = pdev;
2909
2910         /* Setup PCI resources
2911          */
2912
2913         err = pci_enable_device_mem(pdev);
2914         if (err) {
2915                 dev_err(dev, "Cannot enable PCI device, aborting\n");
2916                 goto err_out_free_netdev;
2917         }
2918
2919         err = pci_request_regions(pdev, DRV_NAME);
2920         if (err) {
2921                 dev_err(dev, "Cannot request PCI regions, aborting\n");
2922                 goto err_out_disable_device;
2923         }
2924
2925         pci_set_master(pdev);
2926
2927         /* Query PCI controller on system for DMA addressing
2928          * limitation for the device.  Try 47-bit first, and
2929          * fail to 32-bit.
2930          */
2931
2932         err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(47));
2933         if (err) {
2934                 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2935                 if (err) {
2936                         dev_err(dev, "No usable DMA configuration, aborting\n");
2937                         goto err_out_release_regions;
2938                 }
2939         } else {
2940                 using_dac = 1;
2941         }
2942
2943         /* Map vNIC resources from BAR0-5
2944          */
2945
2946         for (i = 0; i < ARRAY_SIZE(enic->bar); i++) {
2947                 if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
2948                         continue;
2949                 enic->bar[i].len = pci_resource_len(pdev, i);
2950                 enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len);
2951                 if (!enic->bar[i].vaddr) {
2952                         dev_err(dev, "Cannot memory-map BAR %d, aborting\n", i);
2953                         err = -ENODEV;
2954                         goto err_out_iounmap;
2955                 }
2956                 enic->bar[i].bus_addr = pci_resource_start(pdev, i);
2957         }
2958
2959         /* Register vNIC device
2960          */
2961
2962         enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar,
2963                 ARRAY_SIZE(enic->bar));
2964         if (!enic->vdev) {
2965                 dev_err(dev, "vNIC registration failed, aborting\n");
2966                 err = -ENODEV;
2967                 goto err_out_iounmap;
2968         }
2969
2970         err = vnic_devcmd_init(enic->vdev);
2971
2972         if (err)
2973                 goto err_out_vnic_unregister;
2974
2975 #ifdef CONFIG_PCI_IOV
2976         /* Get number of subvnics */
2977         pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_SRIOV);
2978         if (pos) {
2979                 pci_read_config_word(pdev, pos + PCI_SRIOV_TOTAL_VF,
2980                         &enic->num_vfs);
2981                 if (enic->num_vfs) {
2982                         err = pci_enable_sriov(pdev, enic->num_vfs);
2983                         if (err) {
2984                                 dev_err(dev, "SRIOV enable failed, aborting."
2985                                         " pci_enable_sriov() returned %d\n",
2986                                         err);
2987                                 goto err_out_vnic_unregister;
2988                         }
2989                         enic->priv_flags |= ENIC_SRIOV_ENABLED;
2990                         num_pps = enic->num_vfs;
2991                 }
2992         }
2993 #endif
2994
2995         /* Allocate structure for port profiles */
2996         enic->pp = kcalloc(num_pps, sizeof(*enic->pp), GFP_KERNEL);
2997         if (!enic->pp) {
2998                 err = -ENOMEM;
2999                 goto err_out_disable_sriov_pp;
3000         }
3001
3002         /* Issue device open to get device in known state
3003          */
3004
3005         err = enic_dev_open(enic);
3006         if (err) {
3007                 dev_err(dev, "vNIC dev open failed, aborting\n");
3008                 goto err_out_disable_sriov;
3009         }
3010
3011         /* Setup devcmd lock
3012          */
3013
3014         spin_lock_init(&enic->devcmd_lock);
3015         spin_lock_init(&enic->enic_api_lock);
3016
3017         /*
3018          * Set ingress vlan rewrite mode before vnic initialization
3019          */
3020
3021         err = enic_dev_set_ig_vlan_rewrite_mode(enic);
3022         if (err) {
3023                 dev_err(dev,
3024                         "Failed to set ingress vlan rewrite mode, aborting.\n");
3025                 goto err_out_dev_close;
3026         }
3027
3028         /* Issue device init to initialize the vnic-to-switch link.
3029          * We'll start with carrier off and wait for link UP
3030          * notification later to turn on carrier.  We don't need
3031          * to wait here for the vnic-to-switch link initialization
3032          * to complete; link UP notification is the indication that
3033          * the process is complete.
3034          */
3035
3036         netif_carrier_off(netdev);
3037
3038         /* Do not call dev_init for a dynamic vnic.
3039          * For a dynamic vnic, init_prov_info will be
3040          * called later by an upper layer.
3041          */
3042
3043         if (!enic_is_dynamic(enic)) {
3044                 err = vnic_dev_init(enic->vdev, 0);
3045                 if (err) {
3046                         dev_err(dev, "vNIC dev init failed, aborting\n");
3047                         goto err_out_dev_close;
3048                 }
3049         }
3050
3051         err = enic_dev_init(enic);
3052         if (err) {
3053                 dev_err(dev, "Device initialization failed, aborting\n");
3054                 goto err_out_dev_close;
3055         }
3056
3057         netif_set_real_num_tx_queues(netdev, enic->wq_count);
3058         netif_set_real_num_rx_queues(netdev, enic->rq_count);
3059
3060         /* Setup notification timer, HW reset task, and wq locks
3061          */
3062
3063         timer_setup(&enic->notify_timer, enic_notify_timer, 0);
3064
3065         enic_rfs_flw_tbl_init(enic);
3066         enic_set_rx_coal_setting(enic);
3067         INIT_WORK(&enic->reset, enic_reset);
3068         INIT_WORK(&enic->tx_hang_reset, enic_tx_hang_reset);
3069         INIT_WORK(&enic->change_mtu_work, enic_change_mtu_work);
3070
3071         for (i = 0; i < enic->wq_count; i++)
3072                 spin_lock_init(&enic->wq[i].lock);
3073
3074         /* Register net device
3075          */
3076
3077         enic->port_mtu = enic->config.mtu;
3078
3079         err = enic_set_mac_addr(netdev, enic->mac_addr);
3080         if (err) {
3081                 dev_err(dev, "Invalid MAC address, aborting\n");
3082                 goto err_out_dev_deinit;
3083         }
3084
3085         enic->tx_coalesce_usecs = enic->config.intr_timer_usec;
3086         /* rx coalesce time already got initialized. This gets used
3087          * if adaptive coal is turned off
3088          */
3089         enic->rx_coalesce_usecs = enic->tx_coalesce_usecs;
3090
3091         if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic))
3092                 netdev->netdev_ops = &enic_netdev_dynamic_ops;
3093         else
3094                 netdev->netdev_ops = &enic_netdev_ops;
3095         netdev->stat_ops = &enic_netdev_stat_ops;
3096
3097         netdev->watchdog_timeo = 2 * HZ;
3098         enic_set_ethtool_ops(netdev);
3099
3100         netdev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX;
3101         if (ENIC_SETTING(enic, LOOP)) {
3102                 netdev->features &= ~NETIF_F_HW_VLAN_CTAG_TX;
3103                 enic->loop_enable = 1;
3104                 enic->loop_tag = enic->config.loop_tag;
3105                 dev_info(dev, "loopback tag=0x%04x\n", enic->loop_tag);
3106         }
3107         if (ENIC_SETTING(enic, TXCSUM))
3108                 netdev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM;
3109         if (ENIC_SETTING(enic, TSO))
3110                 netdev->hw_features |= NETIF_F_TSO |
3111                         NETIF_F_TSO6 | NETIF_F_TSO_ECN;
3112         if (ENIC_SETTING(enic, RSS))
3113                 netdev->hw_features |= NETIF_F_RXHASH;
3114         if (ENIC_SETTING(enic, RXCSUM))
3115                 netdev->hw_features |= NETIF_F_RXCSUM;
3116         if (ENIC_SETTING(enic, VXLAN)) {
3117                 u64 patch_level;
3118                 u64 a1 = 0;
3119
3120                 netdev->hw_enc_features |= NETIF_F_RXCSUM               |
3121                                            NETIF_F_TSO                  |
3122                                            NETIF_F_TSO6                 |
3123                                            NETIF_F_TSO_ECN              |
3124                                            NETIF_F_GSO_UDP_TUNNEL       |
3125                                            NETIF_F_HW_CSUM              |
3126                                            NETIF_F_GSO_UDP_TUNNEL_CSUM;
3127                 netdev->hw_features |= netdev->hw_enc_features;
3128                 /* get bit mask from hw about supported offload bit level
3129                  * BIT(0) = fw supports patch_level 0
3130                  *          fcoe bit = encap
3131                  *          fcoe_fc_crc_ok = outer csum ok
3132                  * BIT(1) = always set by fw
3133                  * BIT(2) = fw supports patch_level 2
3134                  *          BIT(0) in rss_hash = encap
3135                  *          BIT(1,2) in rss_hash = outer_ip_csum_ok/
3136                  *                                 outer_tcp_csum_ok
3137                  * used in enic_rq_indicate_buf
3138                  */
3139                 err = vnic_dev_get_supported_feature_ver(enic->vdev,
3140                                                          VIC_FEATURE_VXLAN,
3141                                                          &patch_level, &a1);
3142                 if (err)
3143                         patch_level = 0;
3144                 enic->vxlan.flags = (u8)a1;
3145                 /* mask bits that are supported by driver
3146                  */
3147                 patch_level &= BIT_ULL(0) | BIT_ULL(2);
3148                 patch_level = fls(patch_level);
3149                 patch_level = patch_level ? patch_level - 1 : 0;
3150                 enic->vxlan.patch_level = patch_level;
3151
3152                 if (vnic_dev_get_res_count(enic->vdev, RES_TYPE_WQ) == 1 ||
3153                     enic->vxlan.flags & ENIC_VXLAN_MULTI_WQ) {
3154                         netdev->udp_tunnel_nic_info = &enic_udp_tunnels_v4;
3155                         if (enic->vxlan.flags & ENIC_VXLAN_OUTER_IPV6)
3156                                 netdev->udp_tunnel_nic_info = &enic_udp_tunnels;
3157                 }
3158         }
3159
3160         netdev->features |= netdev->hw_features;
3161         netdev->vlan_features |= netdev->features;
3162
3163 #ifdef CONFIG_RFS_ACCEL
3164         netdev->hw_features |= NETIF_F_NTUPLE;
3165 #endif
3166
3167         if (using_dac)
3168                 netdev->features |= NETIF_F_HIGHDMA;
3169
3170         netdev->priv_flags |= IFF_UNICAST_FLT;
3171
3172         /* MTU range: 68 - 9000 */
3173         netdev->min_mtu = ENIC_MIN_MTU;
3174         netdev->max_mtu = ENIC_MAX_MTU;
3175         netdev->mtu     = enic->port_mtu;
3176
3177         err = register_netdev(netdev);
3178         if (err) {
3179                 dev_err(dev, "Cannot register net device, aborting\n");
3180                 goto err_out_dev_deinit;
3181         }
3182         enic->rx_copybreak = RX_COPYBREAK_DEFAULT;
3183
3184         return 0;
3185
3186 err_out_dev_deinit:
3187         enic_dev_deinit(enic);
3188 err_out_dev_close:
3189         vnic_dev_close(enic->vdev);
3190 err_out_disable_sriov:
3191         kfree(enic->pp);
3192 err_out_disable_sriov_pp:
3193 #ifdef CONFIG_PCI_IOV
3194         if (enic_sriov_enabled(enic)) {
3195                 pci_disable_sriov(pdev);
3196                 enic->priv_flags &= ~ENIC_SRIOV_ENABLED;
3197         }
3198 #endif
3199 err_out_vnic_unregister:
3200         vnic_dev_unregister(enic->vdev);
3201 err_out_iounmap:
3202         enic_iounmap(enic);
3203 err_out_release_regions:
3204         pci_release_regions(pdev);
3205 err_out_disable_device:
3206         pci_disable_device(pdev);
3207 err_out_free_netdev:
3208         free_netdev(netdev);
3209
3210         return err;
3211 }
3212
3213 static void enic_remove(struct pci_dev *pdev)
3214 {
3215         struct net_device *netdev = pci_get_drvdata(pdev);
3216
3217         if (netdev) {
3218                 struct enic *enic = netdev_priv(netdev);
3219
3220                 cancel_work_sync(&enic->reset);
3221                 cancel_work_sync(&enic->change_mtu_work);
3222                 unregister_netdev(netdev);
3223                 enic_dev_deinit(enic);
3224                 vnic_dev_close(enic->vdev);
3225 #ifdef CONFIG_PCI_IOV
3226                 if (enic_sriov_enabled(enic)) {
3227                         pci_disable_sriov(pdev);
3228                         enic->priv_flags &= ~ENIC_SRIOV_ENABLED;
3229                 }
3230 #endif
3231                 kfree(enic->pp);
3232                 vnic_dev_unregister(enic->vdev);
3233                 enic_iounmap(enic);
3234                 pci_release_regions(pdev);
3235                 pci_disable_device(pdev);
3236                 free_netdev(netdev);
3237         }
3238 }
3239
3240 static struct pci_driver enic_driver = {
3241         .name = DRV_NAME,
3242         .id_table = enic_id_table,
3243         .probe = enic_probe,
3244         .remove = enic_remove,
3245 };
3246
3247 module_pci_driver(enic_driver);