drivers/net/enic/enic_main.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright 2008-2017 Cisco Systems, Inc.  All rights reserved.
   3  * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
   4  */
   5
   6 #include <stdio.h>
   7
   8 #include <sys/stat.h>
   9 #include <sys/mman.h>
  10 #include <fcntl.h>
  11 #include <libgen.h>
  12
  13 #include <rte_pci.h>
  14 #include <rte_bus_pci.h>
  15 #include <rte_memzone.h>
  16 #include <rte_malloc.h>
  17 #include <rte_mbuf.h>
  18 #include <rte_string_fns.h>
  19 #include <rte_ethdev_driver.h>
  20
  21 #include "enic_compat.h"
  22 #include "enic.h"
  23 #include "wq_enet_desc.h"
  24 #include "rq_enet_desc.h"
  25 #include "cq_enet_desc.h"
  26 #include "vnic_enet.h"
  27 #include "vnic_dev.h"
  28 #include "vnic_wq.h"
  29 #include "vnic_rq.h"
  30 #include "vnic_cq.h"
  31 #include "vnic_intr.h"
  32 #include "vnic_nic.h"
  33
  34 static inline int enic_is_sriov_vf(struct enic *enic)
  35 {
  36         return enic->pdev->id.device_id == PCI_DEVICE_ID_CISCO_VIC_ENET_VF;
  37 }
  38
  39 static int is_zero_addr(uint8_t *addr)
  40 {
  41         return !(addr[0] |  addr[1] | addr[2] | addr[3] | addr[4] | addr[5]);
  42 }
  43
  44 static int is_mcast_addr(uint8_t *addr)
  45 {
  46         return addr[0] & 1;
  47 }
  48
  49 static int is_eth_addr_valid(uint8_t *addr)
  50 {
  51         return !is_mcast_addr(addr) && !is_zero_addr(addr);
  52 }
  53
  54 static void
  55 enic_rxmbuf_queue_release(__rte_unused struct enic *enic, struct vnic_rq *rq)
  56 {
  57         uint16_t i;
  58
  59         if (!rq || !rq->mbuf_ring) {
  60                 dev_debug(enic, "Pointer to rq or mbuf_ring is NULL");
  61                 return;
  62         }
  63
  64         for (i = 0; i < rq->ring.desc_count; i++) {
  65                 if (rq->mbuf_ring[i]) {
  66                         rte_pktmbuf_free_seg(rq->mbuf_ring[i]);
  67                         rq->mbuf_ring[i] = NULL;
  68                 }
  69         }
  70 }
  71
  72 static void enic_free_wq_buf(struct vnic_wq_buf *buf)
  73 {
  74         struct rte_mbuf *mbuf = (struct rte_mbuf *)buf->mb;
  75
  76         rte_pktmbuf_free_seg(mbuf);
  77         buf->mb = NULL;
  78 }
  79
  80 static void enic_log_q_error(struct enic *enic)
  81 {
  82         unsigned int i;
  83         u32 error_status;
  84
  85         for (i = 0; i < enic->wq_count; i++) {
  86                 error_status = vnic_wq_error_status(&enic->wq[i]);
  87                 if (error_status)
  88                         dev_err(enic, "WQ[%d] error_status %d\n", i,
  89                                 error_status);
  90         }
  91
  92         for (i = 0; i < enic_vnic_rq_count(enic); i++) {
  93                 if (!enic->rq[i].in_use)
  94                         continue;
  95                 error_status = vnic_rq_error_status(&enic->rq[i]);
  96                 if (error_status)
  97                         dev_err(enic, "RQ[%d] error_status %d\n", i,
  98                                 error_status);
  99         }
 100 }
 101
 102 static void enic_clear_soft_stats(struct enic *enic)
 103 {
 104         struct enic_soft_stats *soft_stats = &enic->soft_stats;
 105         rte_atomic64_clear(&soft_stats->rx_nombuf);
 106         rte_atomic64_clear(&soft_stats->rx_packet_errors);
 107         rte_atomic64_clear(&soft_stats->tx_oversized);
 108 }
 109
 110 static void enic_init_soft_stats(struct enic *enic)
 111 {
 112         struct enic_soft_stats *soft_stats = &enic->soft_stats;
 113         rte_atomic64_init(&soft_stats->rx_nombuf);
 114         rte_atomic64_init(&soft_stats->rx_packet_errors);
 115         rte_atomic64_init(&soft_stats->tx_oversized);
 116         enic_clear_soft_stats(enic);
 117 }
 118
 119 void enic_dev_stats_clear(struct enic *enic)
 120 {
 121         if (vnic_dev_stats_clear(enic->vdev))
 122                 dev_err(enic, "Error in clearing stats\n");
 123         enic_clear_soft_stats(enic);
 124 }
 125
 126 int enic_dev_stats_get(struct enic *enic, struct rte_eth_stats *r_stats)
 127 {
 128         struct vnic_stats *stats;
 129         struct enic_soft_stats *soft_stats = &enic->soft_stats;
 130         int64_t rx_truncated;
 131         uint64_t rx_packet_errors;
 132         int ret = vnic_dev_stats_dump(enic->vdev, &stats);
 133
 134         if (ret) {
 135                 dev_err(enic, "Error in getting stats\n");
 136                 return ret;
 137         }
 138
 139         /* The number of truncated packets can only be calculated by
 140          * subtracting a hardware counter from error packets received by
 141          * the driver. Note: this causes transient inaccuracies in the
 142          * ipackets count. Also, the length of truncated packets are
 143          * counted in ibytes even though truncated packets are dropped
 144          * which can make ibytes be slightly higher than it should be.
 145          */
 146         rx_packet_errors = rte_atomic64_read(&soft_stats->rx_packet_errors);
 147         rx_truncated = rx_packet_errors - stats->rx.rx_errors;
 148
 149         r_stats->ipackets = stats->rx.rx_frames_ok - rx_truncated;
 150         r_stats->opackets = stats->tx.tx_frames_ok;
 151
 152         r_stats->ibytes = stats->rx.rx_bytes_ok;
 153         r_stats->obytes = stats->tx.tx_bytes_ok;
 154
 155         r_stats->ierrors = stats->rx.rx_errors + stats->rx.rx_drop;
 156         r_stats->oerrors = stats->tx.tx_errors
 157                            + rte_atomic64_read(&soft_stats->tx_oversized);
 158
 159         r_stats->imissed = stats->rx.rx_no_bufs + rx_truncated;
 160
 161         r_stats->rx_nombuf = rte_atomic64_read(&soft_stats->rx_nombuf);
 162         return 0;
 163 }
 164
 165 void enic_del_mac_address(struct enic *enic, int mac_index)
 166 {
 167         struct rte_eth_dev *eth_dev = enic->rte_dev;
 168         uint8_t *mac_addr = eth_dev->data->mac_addrs[mac_index].addr_bytes;
 169
 170         if (vnic_dev_del_addr(enic->vdev, mac_addr))
 171                 dev_err(enic, "del mac addr failed\n");
 172 }
 173
 174 int enic_set_mac_address(struct enic *enic, uint8_t *mac_addr)
 175 {
 176         int err;
 177
 178         if (!is_eth_addr_valid(mac_addr)) {
 179                 dev_err(enic, "invalid mac address\n");
 180                 return -EINVAL;
 181         }
 182
 183         err = vnic_dev_add_addr(enic->vdev, mac_addr);
 184         if (err)
 185                 dev_err(enic, "add mac addr failed\n");
 186         return err;
 187 }
 188
 189 static void
 190 enic_free_rq_buf(struct rte_mbuf **mbuf)
 191 {
 192         if (*mbuf == NULL)
 193                 return;
 194
 195         rte_pktmbuf_free(*mbuf);
 196         *mbuf = NULL;
 197 }
 198
 199 void enic_init_vnic_resources(struct enic *enic)
 200 {
 201         unsigned int error_interrupt_enable = 1;
 202         unsigned int error_interrupt_offset = 0;
 203         unsigned int index = 0;
 204         unsigned int cq_idx;
 205         struct vnic_rq *data_rq;
 206
 207         for (index = 0; index < enic->rq_count; index++) {
 208                 cq_idx = enic_cq_rq(enic, enic_rte_rq_idx_to_sop_idx(index));
 209
 210                 vnic_rq_init(&enic->rq[enic_rte_rq_idx_to_sop_idx(index)],
 211                         cq_idx,
 212                         error_interrupt_enable,
 213                         error_interrupt_offset);
 214
 215                 data_rq = &enic->rq[enic_rte_rq_idx_to_data_idx(index)];
 216                 if (data_rq->in_use)
 217                         vnic_rq_init(data_rq,
 218                                      cq_idx,
 219                                      error_interrupt_enable,
 220                                      error_interrupt_offset);
 221
 222                 vnic_cq_init(&enic->cq[cq_idx],
 223                         0 /* flow_control_enable */,
 224                         1 /* color_enable */,
 225                         0 /* cq_head */,
 226                         0 /* cq_tail */,
 227                         1 /* cq_tail_color */,
 228                         0 /* interrupt_enable */,
 229                         1 /* cq_entry_enable */,
 230                         0 /* cq_message_enable */,
 231                         0 /* interrupt offset */,
 232                         0 /* cq_message_addr */);
 233         }
 234
 235         for (index = 0; index < enic->wq_count; index++) {
 236                 vnic_wq_init(&enic->wq[index],
 237                         enic_cq_wq(enic, index),
 238                         error_interrupt_enable,
 239                         error_interrupt_offset);
 240
 241                 cq_idx = enic_cq_wq(enic, index);
 242                 vnic_cq_init(&enic->cq[cq_idx],
 243                         0 /* flow_control_enable */,
 244                         1 /* color_enable */,
 245                         0 /* cq_head */,
 246                         0 /* cq_tail */,
 247                         1 /* cq_tail_color */,
 248                         0 /* interrupt_enable */,
 249                         0 /* cq_entry_enable */,
 250                         1 /* cq_message_enable */,
 251                         0 /* interrupt offset */,
 252                         (u64)enic->wq[index].cqmsg_rz->iova);
 253         }
 254
 255         vnic_intr_init(&enic->intr,
 256                 enic->config.intr_timer_usec,
 257                 enic->config.intr_timer_type,
 258                 /*mask_on_assertion*/1);
 259 }
 260
 261
 262 static int
 263 enic_alloc_rx_queue_mbufs(struct enic *enic, struct vnic_rq *rq)
 264 {
 265         struct rte_mbuf *mb;
 266         struct rq_enet_desc *rqd = rq->ring.descs;
 267         unsigned i;
 268         dma_addr_t dma_addr;
 269
 270         if (!rq->in_use)
 271                 return 0;
 272
 273         dev_debug(enic, "queue %u, allocating %u rx queue mbufs\n", rq->index,
 274                   rq->ring.desc_count);
 275
 276         for (i = 0; i < rq->ring.desc_count; i++, rqd++) {
 277                 mb = rte_mbuf_raw_alloc(rq->mp);
 278                 if (mb == NULL) {
 279                         dev_err(enic, "RX mbuf alloc failed queue_id=%u\n",
 280                         (unsigned)rq->index);
 281                         return -ENOMEM;
 282                 }
 283
 284                 mb->data_off = RTE_PKTMBUF_HEADROOM;
 285                 dma_addr = (dma_addr_t)(mb->buf_iova
 286                            + RTE_PKTMBUF_HEADROOM);
 287                 rq_enet_desc_enc(rqd, dma_addr,
 288                                 (rq->is_sop ? RQ_ENET_TYPE_ONLY_SOP
 289                                 : RQ_ENET_TYPE_NOT_SOP),
 290                                 mb->buf_len - RTE_PKTMBUF_HEADROOM);
 291                 rq->mbuf_ring[i] = mb;
 292         }
 293
 294         /* make sure all prior writes are complete before doing the PIO write */
 295         rte_rmb();
 296
 297         /* Post all but the last buffer to VIC. */
 298         rq->posted_index = rq->ring.desc_count - 1;
 299
 300         rq->rx_nb_hold = 0;
 301
 302         dev_debug(enic, "port=%u, qidx=%u, Write %u posted idx, %u sw held\n",
 303                 enic->port_id, rq->index, rq->posted_index, rq->rx_nb_hold);
 304         iowrite32(rq->posted_index, &rq->ctrl->posted_index);
 305         iowrite32(0, &rq->ctrl->fetch_index);
 306         rte_rmb();
 307
 308         return 0;
 309
 310 }
 311
 312 static void *
 313 enic_alloc_consistent(void *priv, size_t size,
 314         dma_addr_t *dma_handle, u8 *name)
 315 {
 316         void *vaddr;
 317         const struct rte_memzone *rz;
 318         *dma_handle = 0;
 319         struct enic *enic = (struct enic *)priv;
 320         struct enic_memzone_entry *mze;
 321
 322         rz = rte_memzone_reserve_aligned((const char *)name,
 323                                          size, SOCKET_ID_ANY, 0, ENIC_ALIGN);
 324         if (!rz) {
 325                 pr_err("%s : Failed to allocate memory requested for %s\n",
 326                         __func__, name);
 327                 return NULL;
 328         }
 329
 330         vaddr = rz->addr;
 331         *dma_handle = (dma_addr_t)rz->iova;
 332
 333         mze = rte_malloc("enic memzone entry",
 334                          sizeof(struct enic_memzone_entry), 0);
 335
 336         if (!mze) {
 337                 pr_err("%s : Failed to allocate memory for memzone list\n",
 338                        __func__);
 339                 rte_memzone_free(rz);
 340                 return NULL;
 341         }
 342
 343         mze->rz = rz;
 344
 345         rte_spinlock_lock(&enic->memzone_list_lock);
 346         LIST_INSERT_HEAD(&enic->memzone_list, mze, entries);
 347         rte_spinlock_unlock(&enic->memzone_list_lock);
 348
 349         return vaddr;
 350 }
 351
 352 static void
 353 enic_free_consistent(void *priv,
 354                      __rte_unused size_t size,
 355                      void *vaddr,
 356                      dma_addr_t dma_handle)
 357 {
 358         struct enic_memzone_entry *mze;
 359         struct enic *enic = (struct enic *)priv;
 360
 361         rte_spinlock_lock(&enic->memzone_list_lock);
 362         LIST_FOREACH(mze, &enic->memzone_list, entries) {
 363                 if (mze->rz->addr == vaddr &&
 364                     mze->rz->iova == dma_handle)
 365                         break;
 366         }
 367         if (mze == NULL) {
 368                 rte_spinlock_unlock(&enic->memzone_list_lock);
 369                 dev_warning(enic,
 370                             "Tried to free memory, but couldn't find it in the memzone list\n");
 371                 return;
 372         }
 373         LIST_REMOVE(mze, entries);
 374         rte_spinlock_unlock(&enic->memzone_list_lock);
 375         rte_memzone_free(mze->rz);
 376         rte_free(mze);
 377 }
 378
 379 int enic_link_update(struct enic *enic)
 380 {
 381         struct rte_eth_dev *eth_dev = enic->rte_dev;
 382         int ret;
 383         int link_status = 0;
 384
 385         link_status = enic_get_link_status(enic);
 386         ret = (link_status == enic->link_status);
 387         enic->link_status = link_status;
 388         eth_dev->data->dev_link.link_status = link_status;
 389         eth_dev->data->dev_link.link_duplex = ETH_LINK_FULL_DUPLEX;
 390         eth_dev->data->dev_link.link_speed = vnic_dev_port_speed(enic->vdev);
 391         return ret;
 392 }
 393
 394 static void
 395 enic_intr_handler(void *arg)
 396 {
 397         struct rte_eth_dev *dev = (struct rte_eth_dev *)arg;
 398         struct enic *enic = pmd_priv(dev);
 399
 400         vnic_intr_return_all_credits(&enic->intr);
 401
 402         enic_link_update(enic);
 403         _rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL);
 404         enic_log_q_error(enic);
 405 }
 406
 407 int enic_enable(struct enic *enic)
 408 {
 409         unsigned int index;
 410         int err;
 411         struct rte_eth_dev *eth_dev = enic->rte_dev;
 412
 413         eth_dev->data->dev_link.link_speed = vnic_dev_port_speed(enic->vdev);
 414         eth_dev->data->dev_link.link_duplex = ETH_LINK_FULL_DUPLEX;
 415
 416         /* vnic notification of link status has already been turned on in
 417          * enic_dev_init() which is called during probe time.  Here we are
 418          * just turning on interrupt vector 0 if needed.
 419          */
 420         if (eth_dev->data->dev_conf.intr_conf.lsc)
 421                 vnic_dev_notify_set(enic->vdev, 0);
 422
 423         if (enic_clsf_init(enic))
 424                 dev_warning(enic, "Init of hash table for clsf failed."\
 425                         "Flow director feature will not work\n");
 426
 427         for (index = 0; index < enic->rq_count; index++) {
 428                 err = enic_alloc_rx_queue_mbufs(enic,
 429                         &enic->rq[enic_rte_rq_idx_to_sop_idx(index)]);
 430                 if (err) {
 431                         dev_err(enic, "Failed to alloc sop RX queue mbufs\n");
 432                         return err;
 433                 }
 434                 err = enic_alloc_rx_queue_mbufs(enic,
 435                         &enic->rq[enic_rte_rq_idx_to_data_idx(index)]);
 436                 if (err) {
 437                         /* release the allocated mbufs for the sop rq*/
 438                         enic_rxmbuf_queue_release(enic,
 439                                 &enic->rq[enic_rte_rq_idx_to_sop_idx(index)]);
 440
 441                         dev_err(enic, "Failed to alloc data RX queue mbufs\n");
 442                         return err;
 443                 }
 444         }
 445
 446         for (index = 0; index < enic->wq_count; index++)
 447                 enic_start_wq(enic, index);
 448         for (index = 0; index < enic->rq_count; index++)
 449                 enic_start_rq(enic, index);
 450
 451         vnic_dev_add_addr(enic->vdev, enic->mac_addr);
 452
 453         vnic_dev_enable_wait(enic->vdev);
 454
 455         /* Register and enable error interrupt */
 456         rte_intr_callback_register(&(enic->pdev->intr_handle),
 457                 enic_intr_handler, (void *)enic->rte_dev);
 458
 459         rte_intr_enable(&(enic->pdev->intr_handle));
 460         vnic_intr_unmask(&enic->intr);
 461
 462         return 0;
 463 }
 464
 465 int enic_alloc_intr_resources(struct enic *enic)
 466 {
 467         int err;
 468
 469         dev_info(enic, "vNIC resources used:  "\
 470                 "wq %d rq %d cq %d intr %d\n",
 471                 enic->wq_count, enic_vnic_rq_count(enic),
 472                 enic->cq_count, enic->intr_count);
 473
 474         err = vnic_intr_alloc(enic->vdev, &enic->intr, 0);
 475         if (err)
 476                 enic_free_vnic_resources(enic);
 477
 478         return err;
 479 }
 480
 481 void enic_free_rq(void *rxq)
 482 {
 483         struct vnic_rq *rq_sop, *rq_data;
 484         struct enic *enic;
 485
 486         if (rxq == NULL)
 487                 return;
 488
 489         rq_sop = (struct vnic_rq *)rxq;
 490         enic = vnic_dev_priv(rq_sop->vdev);
 491         rq_data = &enic->rq[rq_sop->data_queue_idx];
 492
 493         enic_rxmbuf_queue_release(enic, rq_sop);
 494         if (rq_data->in_use)
 495                 enic_rxmbuf_queue_release(enic, rq_data);
 496
 497         rte_free(rq_sop->mbuf_ring);
 498         if (rq_data->in_use)
 499                 rte_free(rq_data->mbuf_ring);
 500
 501         rq_sop->mbuf_ring = NULL;
 502         rq_data->mbuf_ring = NULL;
 503
 504         vnic_rq_free(rq_sop);
 505         if (rq_data->in_use)
 506                 vnic_rq_free(rq_data);
 507
 508         vnic_cq_free(&enic->cq[enic_sop_rq_idx_to_cq_idx(rq_sop->index)]);
 509
 510         rq_sop->in_use = 0;
 511         rq_data->in_use = 0;
 512 }
 513
 514 void enic_start_wq(struct enic *enic, uint16_t queue_idx)
 515 {
 516         struct rte_eth_dev *eth_dev = enic->rte_dev;
 517         vnic_wq_enable(&enic->wq[queue_idx]);
 518         eth_dev->data->tx_queue_state[queue_idx] = RTE_ETH_QUEUE_STATE_STARTED;
 519 }
 520
 521 int enic_stop_wq(struct enic *enic, uint16_t queue_idx)
 522 {
 523         struct rte_eth_dev *eth_dev = enic->rte_dev;
 524         int ret;
 525
 526         ret = vnic_wq_disable(&enic->wq[queue_idx]);
 527         if (ret)
 528                 return ret;
 529
 530         eth_dev->data->tx_queue_state[queue_idx] = RTE_ETH_QUEUE_STATE_STOPPED;
 531         return 0;
 532 }
 533
 534 void enic_start_rq(struct enic *enic, uint16_t queue_idx)
 535 {
 536         struct vnic_rq *rq_sop;
 537         struct vnic_rq *rq_data;
 538         rq_sop = &enic->rq[enic_rte_rq_idx_to_sop_idx(queue_idx)];
 539         rq_data = &enic->rq[rq_sop->data_queue_idx];
 540         struct rte_eth_dev *eth_dev = enic->rte_dev;
 541
 542         if (rq_data->in_use)
 543                 vnic_rq_enable(rq_data);
 544         rte_mb();
 545         vnic_rq_enable(rq_sop);
 546         eth_dev->data->rx_queue_state[queue_idx] = RTE_ETH_QUEUE_STATE_STARTED;
 547 }
 548
 549 int enic_stop_rq(struct enic *enic, uint16_t queue_idx)
 550 {
 551         int ret1 = 0, ret2 = 0;
 552         struct rte_eth_dev *eth_dev = enic->rte_dev;
 553         struct vnic_rq *rq_sop;
 554         struct vnic_rq *rq_data;
 555         rq_sop = &enic->rq[enic_rte_rq_idx_to_sop_idx(queue_idx)];
 556         rq_data = &enic->rq[rq_sop->data_queue_idx];
 557
 558         ret2 = vnic_rq_disable(rq_sop);
 559         rte_mb();
 560         if (rq_data->in_use)
 561                 ret1 = vnic_rq_disable(rq_data);
 562
 563         if (ret2)
 564                 return ret2;
 565         else if (ret1)
 566                 return ret1;
 567
 568         eth_dev->data->rx_queue_state[queue_idx] = RTE_ETH_QUEUE_STATE_STOPPED;
 569         return 0;
 570 }
 571
 572 int enic_alloc_rq(struct enic *enic, uint16_t queue_idx,
 573         unsigned int socket_id, struct rte_mempool *mp,
 574         uint16_t nb_desc, uint16_t free_thresh)
 575 {
 576         int rc;
 577         uint16_t sop_queue_idx = enic_rte_rq_idx_to_sop_idx(queue_idx);
 578         uint16_t data_queue_idx = enic_rte_rq_idx_to_data_idx(queue_idx);
 579         struct vnic_rq *rq_sop = &enic->rq[sop_queue_idx];
 580         struct vnic_rq *rq_data = &enic->rq[data_queue_idx];
 581         unsigned int mbuf_size, mbufs_per_pkt;
 582         unsigned int nb_sop_desc, nb_data_desc;
 583         uint16_t min_sop, max_sop, min_data, max_data;
 584         uint16_t mtu = enic->rte_dev->data->mtu;
 585
 586         rq_sop->is_sop = 1;
 587         rq_sop->data_queue_idx = data_queue_idx;
 588         rq_data->is_sop = 0;
 589         rq_data->data_queue_idx = 0;
 590         rq_sop->socket_id = socket_id;
 591         rq_sop->mp = mp;
 592         rq_data->socket_id = socket_id;
 593         rq_data->mp = mp;
 594         rq_sop->in_use = 1;
 595         rq_sop->rx_free_thresh = free_thresh;
 596         rq_data->rx_free_thresh = free_thresh;
 597         dev_debug(enic, "Set queue_id:%u free thresh:%u\n", queue_idx,
 598                   free_thresh);
 599
 600         mbuf_size = (uint16_t)(rte_pktmbuf_data_room_size(mp) -
 601                                RTE_PKTMBUF_HEADROOM);
 602
 603         if (enic->rte_dev->data->dev_conf.rxmode.offloads &
 604             DEV_RX_OFFLOAD_SCATTER) {
 605                 dev_info(enic, "Rq %u Scatter rx mode enabled\n", queue_idx);
 606                 /* ceil((mtu + ETHER_HDR_LEN + 4)/mbuf_size) */
 607                 mbufs_per_pkt = ((mtu + ETHER_HDR_LEN + 4) +
 608                                  (mbuf_size - 1)) / mbuf_size;
 609         } else {
 610                 dev_info(enic, "Scatter rx mode disabled\n");
 611                 mbufs_per_pkt = 1;
 612         }
 613
 614         if (mbufs_per_pkt > 1) {
 615                 dev_info(enic, "Rq %u Scatter rx mode in use\n", queue_idx);
 616                 rq_sop->data_queue_enable = 1;
 617                 rq_data->in_use = 1;
 618         } else {
 619                 dev_info(enic, "Rq %u Scatter rx mode not being used\n",
 620                          queue_idx);
 621                 rq_sop->data_queue_enable = 0;
 622                 rq_data->in_use = 0;
 623         }
 624
 625         /* number of descriptors have to be a multiple of 32 */
 626         nb_sop_desc = (nb_desc / mbufs_per_pkt) & ~0x1F;
 627         nb_data_desc = (nb_desc - nb_sop_desc) & ~0x1F;
 628
 629         rq_sop->max_mbufs_per_pkt = mbufs_per_pkt;
 630         rq_data->max_mbufs_per_pkt = mbufs_per_pkt;
 631
 632         if (mbufs_per_pkt > 1) {
 633                 min_sop = 64;
 634                 max_sop = ((enic->config.rq_desc_count /
 635                             (mbufs_per_pkt - 1)) & ~0x1F);
 636                 min_data = min_sop * (mbufs_per_pkt - 1);
 637                 max_data = enic->config.rq_desc_count;
 638         } else {
 639                 min_sop = 64;
 640                 max_sop = enic->config.rq_desc_count;
 641                 min_data = 0;
 642                 max_data = 0;
 643         }
 644
 645         if (nb_desc < (min_sop + min_data)) {
 646                 dev_warning(enic,
 647                             "Number of rx descs too low, adjusting to minimum\n");
 648                 nb_sop_desc = min_sop;
 649                 nb_data_desc = min_data;
 650         } else if (nb_desc > (max_sop + max_data)) {
 651                 dev_warning(enic,
 652                             "Number of rx_descs too high, adjusting to maximum\n");
 653                 nb_sop_desc = max_sop;
 654                 nb_data_desc = max_data;
 655         }
 656         if (mbufs_per_pkt > 1) {
 657                 dev_info(enic, "For mtu %d and mbuf size %d valid rx descriptor range is %d to %d\n",
 658                          mtu, mbuf_size, min_sop + min_data,
 659                          max_sop + max_data);
 660         }
 661         dev_info(enic, "Using %d rx descriptors (sop %d, data %d)\n",
 662                  nb_sop_desc + nb_data_desc, nb_sop_desc, nb_data_desc);
 663
 664         /* Allocate sop queue resources */
 665         rc = vnic_rq_alloc(enic->vdev, rq_sop, sop_queue_idx,
 666                 nb_sop_desc, sizeof(struct rq_enet_desc));
 667         if (rc) {
 668                 dev_err(enic, "error in allocation of sop rq\n");
 669                 goto err_exit;
 670         }
 671         nb_sop_desc = rq_sop->ring.desc_count;
 672
 673         if (rq_data->in_use) {
 674                 /* Allocate data queue resources */
 675                 rc = vnic_rq_alloc(enic->vdev, rq_data, data_queue_idx,
 676                                    nb_data_desc,
 677                                    sizeof(struct rq_enet_desc));
 678                 if (rc) {
 679                         dev_err(enic, "error in allocation of data rq\n");
 680                         goto err_free_rq_sop;
 681                 }
 682                 nb_data_desc = rq_data->ring.desc_count;
 683         }
 684         rc = vnic_cq_alloc(enic->vdev, &enic->cq[queue_idx], queue_idx,
 685                            socket_id, nb_sop_desc + nb_data_desc,
 686                            sizeof(struct cq_enet_rq_desc));
 687         if (rc) {
 688                 dev_err(enic, "error in allocation of cq for rq\n");
 689                 goto err_free_rq_data;
 690         }
 691
 692         /* Allocate the mbuf rings */
 693         rq_sop->mbuf_ring = (struct rte_mbuf **)
 694                 rte_zmalloc_socket("rq->mbuf_ring",
 695                                    sizeof(struct rte_mbuf *) * nb_sop_desc,
 696                                    RTE_CACHE_LINE_SIZE, rq_sop->socket_id);
 697         if (rq_sop->mbuf_ring == NULL)
 698                 goto err_free_cq;
 699
 700         if (rq_data->in_use) {
 701                 rq_data->mbuf_ring = (struct rte_mbuf **)
 702                         rte_zmalloc_socket("rq->mbuf_ring",
 703                                 sizeof(struct rte_mbuf *) * nb_data_desc,
 704                                 RTE_CACHE_LINE_SIZE, rq_sop->socket_id);
 705                 if (rq_data->mbuf_ring == NULL)
 706                         goto err_free_sop_mbuf;
 707         }
 708
 709         rq_sop->tot_nb_desc = nb_desc; /* squirl away for MTU update function */
 710
 711         return 0;
 712
 713 err_free_sop_mbuf:
 714         rte_free(rq_sop->mbuf_ring);
 715 err_free_cq:
 716         /* cleanup on error */
 717         vnic_cq_free(&enic->cq[queue_idx]);
 718 err_free_rq_data:
 719         if (rq_data->in_use)
 720                 vnic_rq_free(rq_data);
 721 err_free_rq_sop:
 722         vnic_rq_free(rq_sop);
 723 err_exit:
 724         return -ENOMEM;
 725 }
 726
 727 void enic_free_wq(void *txq)
 728 {
 729         struct vnic_wq *wq;
 730         struct enic *enic;
 731
 732         if (txq == NULL)
 733                 return;
 734
 735         wq = (struct vnic_wq *)txq;
 736         enic = vnic_dev_priv(wq->vdev);
 737         rte_memzone_free(wq->cqmsg_rz);
 738         vnic_wq_free(wq);
 739         vnic_cq_free(&enic->cq[enic->rq_count + wq->index]);
 740 }
 741
 742 int enic_alloc_wq(struct enic *enic, uint16_t queue_idx,
 743         unsigned int socket_id, uint16_t nb_desc)
 744 {
 745         int err;
 746         struct vnic_wq *wq = &enic->wq[queue_idx];
 747         unsigned int cq_index = enic_cq_wq(enic, queue_idx);
 748         char name[NAME_MAX];
 749         static int instance;
 750
 751         wq->socket_id = socket_id;
 752         if (nb_desc) {
 753                 if (nb_desc > enic->config.wq_desc_count) {
 754                         dev_warning(enic,
 755                                 "WQ %d - number of tx desc in cmd line (%d)"\
 756                                 "is greater than that in the UCSM/CIMC adapter"\
 757                                 "policy.  Applying the value in the adapter "\
 758                                 "policy (%d)\n",
 759                                 queue_idx, nb_desc, enic->config.wq_desc_count);
 760                 } else if (nb_desc != enic->config.wq_desc_count) {
 761                         enic->config.wq_desc_count = nb_desc;
 762                         dev_info(enic,
 763                                 "TX Queues - effective number of descs:%d\n",
 764                                 nb_desc);
 765                 }
 766         }
 767
 768         /* Allocate queue resources */
 769         err = vnic_wq_alloc(enic->vdev, &enic->wq[queue_idx], queue_idx,
 770                 enic->config.wq_desc_count,
 771                 sizeof(struct wq_enet_desc));
 772         if (err) {
 773                 dev_err(enic, "error in allocation of wq\n");
 774                 return err;
 775         }
 776
 777         err = vnic_cq_alloc(enic->vdev, &enic->cq[cq_index], cq_index,
 778                 socket_id, enic->config.wq_desc_count,
 779                 sizeof(struct cq_enet_wq_desc));
 780         if (err) {
 781                 vnic_wq_free(wq);
 782                 dev_err(enic, "error in allocation of cq for wq\n");
 783         }
 784
 785         /* setup up CQ message */
 786         snprintf((char *)name, sizeof(name),
 787                  "vnic_cqmsg-%s-%d-%d", enic->bdf_name, queue_idx,
 788                 instance++);
 789
 790         wq->cqmsg_rz = rte_memzone_reserve_aligned((const char *)name,
 791                                                    sizeof(uint32_t),
 792                                                    SOCKET_ID_ANY, 0,
 793                                                    ENIC_ALIGN);
 794         if (!wq->cqmsg_rz)
 795                 return -ENOMEM;
 796
 797         return err;
 798 }
 799
 800 int enic_disable(struct enic *enic)
 801 {
 802         unsigned int i;
 803         int err;
 804
 805         vnic_intr_mask(&enic->intr);
 806         (void)vnic_intr_masked(&enic->intr); /* flush write */
 807         rte_intr_disable(&enic->pdev->intr_handle);
 808         rte_intr_callback_unregister(&enic->pdev->intr_handle,
 809                                      enic_intr_handler,
 810                                      (void *)enic->rte_dev);
 811
 812         vnic_dev_disable(enic->vdev);
 813
 814         enic_clsf_destroy(enic);
 815
 816         if (!enic_is_sriov_vf(enic))
 817                 vnic_dev_del_addr(enic->vdev, enic->mac_addr);
 818
 819         for (i = 0; i < enic->wq_count; i++) {
 820                 err = vnic_wq_disable(&enic->wq[i]);
 821                 if (err)
 822                         return err;
 823         }
 824         for (i = 0; i < enic_vnic_rq_count(enic); i++) {
 825                 if (enic->rq[i].in_use) {
 826                         err = vnic_rq_disable(&enic->rq[i]);
 827                         if (err)
 828                                 return err;
 829                 }
 830         }
 831
 832         /* If we were using interrupts, set the interrupt vector to -1
 833          * to disable interrupts.  We are not disabling link notifcations,
 834          * though, as we want the polling of link status to continue working.
 835          */
 836         if (enic->rte_dev->data->dev_conf.intr_conf.lsc)
 837                 vnic_dev_notify_set(enic->vdev, -1);
 838
 839         vnic_dev_set_reset_flag(enic->vdev, 1);
 840
 841         for (i = 0; i < enic->wq_count; i++)
 842                 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
 843
 844         for (i = 0; i < enic_vnic_rq_count(enic); i++)
 845                 if (enic->rq[i].in_use)
 846                         vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
 847         for (i = 0; i < enic->cq_count; i++)
 848                 vnic_cq_clean(&enic->cq[i]);
 849         vnic_intr_clean(&enic->intr);
 850
 851         return 0;
 852 }
 853
 854 static int enic_dev_wait(struct vnic_dev *vdev,
 855         int (*start)(struct vnic_dev *, int),
 856         int (*finished)(struct vnic_dev *, int *),
 857         int arg)
 858 {
 859         int done;
 860         int err;
 861         int i;
 862
 863         err = start(vdev, arg);
 864         if (err)
 865                 return err;
 866
 867         /* Wait for func to complete...2 seconds max */
 868         for (i = 0; i < 2000; i++) {
 869                 err = finished(vdev, &done);
 870                 if (err)
 871                         return err;
 872                 if (done)
 873                         return 0;
 874                 usleep(1000);
 875         }
 876         return -ETIMEDOUT;
 877 }
 878
 879 static int enic_dev_open(struct enic *enic)
 880 {
 881         int err;
 882
 883         err = enic_dev_wait(enic->vdev, vnic_dev_open,
 884                 vnic_dev_open_done, 0);
 885         if (err)
 886                 dev_err(enic_get_dev(enic),
 887                         "vNIC device open failed, err %d\n", err);
 888
 889         return err;
 890 }
 891
 892 static int enic_set_rsskey(struct enic *enic)
 893 {
 894         dma_addr_t rss_key_buf_pa;
 895         union vnic_rss_key *rss_key_buf_va = NULL;
 896         static union vnic_rss_key rss_key = {
 897                 .key = {
 898                         [0] = {.b = {85, 67, 83, 97, 119, 101, 115, 111, 109, 101}},
 899                         [1] = {.b = {80, 65, 76, 79, 117, 110, 105, 113, 117, 101}},
 900                         [2] = {.b = {76, 73, 78, 85, 88, 114, 111, 99, 107, 115}},
 901                         [3] = {.b = {69, 78, 73, 67, 105, 115, 99, 111, 111, 108}},
 902                 }
 903         };
 904         int err;
 905         u8 name[NAME_MAX];
 906
 907         snprintf((char *)name, NAME_MAX, "rss_key-%s", enic->bdf_name);
 908         rss_key_buf_va = enic_alloc_consistent(enic, sizeof(union vnic_rss_key),
 909                 &rss_key_buf_pa, name);
 910         if (!rss_key_buf_va)
 911                 return -ENOMEM;
 912
 913         rte_memcpy(rss_key_buf_va, &rss_key, sizeof(union vnic_rss_key));
 914
 915         err = enic_set_rss_key(enic,
 916                 rss_key_buf_pa,
 917                 sizeof(union vnic_rss_key));
 918
 919         enic_free_consistent(enic, sizeof(union vnic_rss_key),
 920                 rss_key_buf_va, rss_key_buf_pa);
 921
 922         return err;
 923 }
 924
 925 static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits)
 926 {
 927         dma_addr_t rss_cpu_buf_pa;
 928         union vnic_rss_cpu *rss_cpu_buf_va = NULL;
 929         int i;
 930         int err;
 931         u8 name[NAME_MAX];
 932
 933         snprintf((char *)name, NAME_MAX, "rss_cpu-%s", enic->bdf_name);
 934         rss_cpu_buf_va = enic_alloc_consistent(enic, sizeof(union vnic_rss_cpu),
 935                 &rss_cpu_buf_pa, name);
 936         if (!rss_cpu_buf_va)
 937                 return -ENOMEM;
 938
 939         for (i = 0; i < (1 << rss_hash_bits); i++)
 940                 (*rss_cpu_buf_va).cpu[i / 4].b[i % 4] =
 941                         enic_rte_rq_idx_to_sop_idx(i % enic->rq_count);
 942
 943         err = enic_set_rss_cpu(enic,
 944                 rss_cpu_buf_pa,
 945                 sizeof(union vnic_rss_cpu));
 946
 947         enic_free_consistent(enic, sizeof(union vnic_rss_cpu),
 948                 rss_cpu_buf_va, rss_cpu_buf_pa);
 949
 950         return err;
 951 }
 952
 953 static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu,
 954         u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable)
 955 {
 956         const u8 tso_ipid_split_en = 0;
 957         int err;
 958
 959         /* Enable VLAN tag stripping */
 960
 961         err = enic_set_nic_cfg(enic,
 962                 rss_default_cpu, rss_hash_type,
 963                 rss_hash_bits, rss_base_cpu,
 964                 rss_enable, tso_ipid_split_en,
 965                 enic->ig_vlan_strip_en);
 966
 967         return err;
 968 }
 969
 970 int enic_set_rss_nic_cfg(struct enic *enic)
 971 {
 972         const u8 rss_default_cpu = 0;
 973         const u8 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 |
 974             NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 |
 975             NIC_CFG_RSS_HASH_TYPE_IPV6 |
 976             NIC_CFG_RSS_HASH_TYPE_TCP_IPV6;
 977         const u8 rss_hash_bits = 7;
 978         const u8 rss_base_cpu = 0;
 979         u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1);
 980
 981         if (rss_enable) {
 982                 if (!enic_set_rsskey(enic)) {
 983                         if (enic_set_rsscpu(enic, rss_hash_bits)) {
 984                                 rss_enable = 0;
 985                                 dev_warning(enic, "RSS disabled, "\
 986                                         "Failed to set RSS cpu indirection table.");
 987                         }
 988                 } else {
 989                         rss_enable = 0;
 990                         dev_warning(enic,
 991                                 "RSS disabled, Failed to set RSS key.\n");
 992                 }
 993         }
 994
 995         return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type,
 996                 rss_hash_bits, rss_base_cpu, rss_enable);
 997 }
 998
 999 int enic_setup_finish(struct enic *enic)
1000 {
1001         int ret;
1002
1003         enic_init_soft_stats(enic);
1004
1005         ret = enic_set_rss_nic_cfg(enic);
1006         if (ret) {
1007                 dev_err(enic, "Failed to config nic, aborting.\n");
1008                 return -1;
1009         }
1010
1011         /* Default conf */
1012         vnic_dev_packet_filter(enic->vdev,
1013                 1 /* directed  */,
1014                 1 /* multicast */,
1015                 1 /* broadcast */,
1016                 0 /* promisc   */,
1017                 1 /* allmulti  */);
1018
1019         enic->promisc = 0;
1020         enic->allmulti = 1;
1021
1022         return 0;
1023 }
1024
1025 void enic_add_packet_filter(struct enic *enic)
1026 {
1027         /* Args -> directed, multicast, broadcast, promisc, allmulti */
1028         vnic_dev_packet_filter(enic->vdev, 1, 1, 1,
1029                 enic->promisc, enic->allmulti);
1030 }
1031
1032 int enic_get_link_status(struct enic *enic)
1033 {
1034         return vnic_dev_link_status(enic->vdev);
1035 }
1036
1037 static void enic_dev_deinit(struct enic *enic)
1038 {
1039         struct rte_eth_dev *eth_dev = enic->rte_dev;
1040
1041         /* stop link status checking */
1042         vnic_dev_notify_unset(enic->vdev);
1043
1044         rte_free(eth_dev->data->mac_addrs);
1045         rte_free(enic->cq);
1046         rte_free(enic->rq);
1047         rte_free(enic->wq);
1048 }
1049
1050
1051 int enic_set_vnic_res(struct enic *enic)
1052 {
1053         struct rte_eth_dev *eth_dev = enic->rte_dev;
1054         int rc = 0;
1055         unsigned int required_rq, required_wq, required_cq;
1056
1057         /* Always use two vNIC RQs per eth_dev RQ, regardless of Rx scatter. */
1058         required_rq = eth_dev->data->nb_rx_queues * 2;
1059         required_wq = eth_dev->data->nb_tx_queues;
1060         required_cq = eth_dev->data->nb_rx_queues + eth_dev->data->nb_tx_queues;
1061
1062         if (enic->conf_rq_count < required_rq) {
1063                 dev_err(dev, "Not enough Receive queues. Requested:%u which uses %d RQs on VIC, Configured:%u\n",
1064                         eth_dev->data->nb_rx_queues,
1065                         required_rq, enic->conf_rq_count);
1066                 rc = -EINVAL;
1067         }
1068         if (enic->conf_wq_count < required_wq) {
1069                 dev_err(dev, "Not enough Transmit queues. Requested:%u, Configured:%u\n",
1070                         eth_dev->data->nb_tx_queues, enic->conf_wq_count);
1071                 rc = -EINVAL;
1072         }
1073
1074         if (enic->conf_cq_count < required_cq) {
1075                 dev_err(dev, "Not enough Completion queues. Required:%u, Configured:%u\n",
1076                         required_cq, enic->conf_cq_count);
1077                 rc = -EINVAL;
1078         }
1079
1080         if (rc == 0) {
1081                 enic->rq_count = eth_dev->data->nb_rx_queues;
1082                 enic->wq_count = eth_dev->data->nb_tx_queues;
1083                 enic->cq_count = enic->rq_count + enic->wq_count;
1084         }
1085
1086         return rc;
1087 }
1088
1089 /* Initialize the completion queue for an RQ */
1090 static int
1091 enic_reinit_rq(struct enic *enic, unsigned int rq_idx)
1092 {
1093         struct vnic_rq *sop_rq, *data_rq;
1094         unsigned int cq_idx;
1095         int rc = 0;
1096
1097         sop_rq = &enic->rq[enic_rte_rq_idx_to_sop_idx(rq_idx)];
1098         data_rq = &enic->rq[enic_rte_rq_idx_to_data_idx(rq_idx)];
1099         cq_idx = rq_idx;
1100
1101         vnic_cq_clean(&enic->cq[cq_idx]);
1102         vnic_cq_init(&enic->cq[cq_idx],
1103                      0 /* flow_control_enable */,
1104                      1 /* color_enable */,
1105                      0 /* cq_head */,
1106                      0 /* cq_tail */,
1107                      1 /* cq_tail_color */,
1108                      0 /* interrupt_enable */,
1109                      1 /* cq_entry_enable */,
1110                      0 /* cq_message_enable */,
1111                      0 /* interrupt offset */,
1112                      0 /* cq_message_addr */);
1113
1114
1115         vnic_rq_init_start(sop_rq, enic_cq_rq(enic,
1116                            enic_rte_rq_idx_to_sop_idx(rq_idx)), 0,
1117                            sop_rq->ring.desc_count - 1, 1, 0);
1118         if (data_rq->in_use) {
1119                 vnic_rq_init_start(data_rq,
1120                                    enic_cq_rq(enic,
1121                                    enic_rte_rq_idx_to_data_idx(rq_idx)), 0,
1122                                    data_rq->ring.desc_count - 1, 1, 0);
1123         }
1124
1125         rc = enic_alloc_rx_queue_mbufs(enic, sop_rq);
1126         if (rc)
1127                 return rc;
1128
1129         if (data_rq->in_use) {
1130                 rc = enic_alloc_rx_queue_mbufs(enic, data_rq);
1131                 if (rc) {
1132                         enic_rxmbuf_queue_release(enic, sop_rq);
1133                         return rc;
1134                 }
1135         }
1136
1137         return 0;
1138 }
1139
1140 /* The Cisco NIC can send and receive packets up to a max packet size
1141  * determined by the NIC type and firmware. There is also an MTU
1142  * configured into the NIC via the CIMC/UCSM management interface
1143  * which can be overridden by this function (up to the max packet size).
1144  * Depending on the network setup, doing so may cause packet drops
1145  * and unexpected behavior.
1146  */
1147 int enic_set_mtu(struct enic *enic, uint16_t new_mtu)
1148 {
1149         unsigned int rq_idx;
1150         struct vnic_rq *rq;
1151         int rc = 0;
1152         uint16_t old_mtu;       /* previous setting */
1153         uint16_t config_mtu;    /* Value configured into NIC via CIMC/UCSM */
1154         struct rte_eth_dev *eth_dev = enic->rte_dev;
1155
1156         old_mtu = eth_dev->data->mtu;
1157         config_mtu = enic->config.mtu;
1158
1159         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
1160                 return -E_RTE_SECONDARY;
1161
1162         if (new_mtu > enic->max_mtu) {
1163                 dev_err(enic,
1164                         "MTU not updated: requested (%u) greater than max (%u)\n",
1165                         new_mtu, enic->max_mtu);
1166                 return -EINVAL;
1167         }
1168         if (new_mtu < ENIC_MIN_MTU) {
1169                 dev_info(enic,
1170                         "MTU not updated: requested (%u) less than min (%u)\n",
1171                         new_mtu, ENIC_MIN_MTU);
1172                 return -EINVAL;
1173         }
1174         if (new_mtu > config_mtu)
1175                 dev_warning(enic,
1176                         "MTU (%u) is greater than value configured in NIC (%u)\n",
1177                         new_mtu, config_mtu);
1178
1179         /* The easy case is when scatter is disabled. However if the MTU
1180          * becomes greater than the mbuf data size, packet drops will ensue.
1181          */
1182         if (!(enic->rte_dev->data->dev_conf.rxmode.offloads &
1183               DEV_RX_OFFLOAD_SCATTER)) {
1184                 eth_dev->data->mtu = new_mtu;
1185                 goto set_mtu_done;
1186         }
1187
1188         /* Rx scatter is enabled so reconfigure RQ's on the fly. The point is to
1189          * change Rx scatter mode if necessary for better performance. I.e. if
1190          * MTU was greater than the mbuf size and now it's less, scatter Rx
1191          * doesn't have to be used and vice versa.
1192           */
1193         rte_spinlock_lock(&enic->mtu_lock);
1194
1195         /* Stop traffic on all RQs */
1196         for (rq_idx = 0; rq_idx < enic->rq_count * 2; rq_idx++) {
1197                 rq = &enic->rq[rq_idx];
1198                 if (rq->is_sop && rq->in_use) {
1199                         rc = enic_stop_rq(enic,
1200                                           enic_sop_rq_idx_to_rte_idx(rq_idx));
1201                         if (rc) {
1202                                 dev_err(enic, "Failed to stop Rq %u\n", rq_idx);
1203                                 goto set_mtu_done;
1204                         }
1205                 }
1206         }
1207
1208         /* replace Rx function with a no-op to avoid getting stale pkts */
1209         eth_dev->rx_pkt_burst = enic_dummy_recv_pkts;
1210         rte_mb();
1211
1212         /* Allow time for threads to exit the real Rx function. */
1213         usleep(100000);
1214
1215         /* now it is safe to reconfigure the RQs */
1216
1217         /* update the mtu */
1218         eth_dev->data->mtu = new_mtu;
1219
1220         /* free and reallocate RQs with the new MTU */
1221         for (rq_idx = 0; rq_idx < enic->rq_count; rq_idx++) {
1222                 rq = &enic->rq[enic_rte_rq_idx_to_sop_idx(rq_idx)];
1223
1224                 enic_free_rq(rq);
1225                 rc = enic_alloc_rq(enic, rq_idx, rq->socket_id, rq->mp,
1226                                    rq->tot_nb_desc, rq->rx_free_thresh);
1227                 if (rc) {
1228                         dev_err(enic,
1229                                 "Fatal MTU alloc error- No traffic will pass\n");
1230                         goto set_mtu_done;
1231                 }
1232
1233                 rc = enic_reinit_rq(enic, rq_idx);
1234                 if (rc) {
1235                         dev_err(enic,
1236                                 "Fatal MTU RQ reinit- No traffic will pass\n");
1237                         goto set_mtu_done;
1238                 }
1239         }
1240
1241         /* put back the real receive function */
1242         rte_mb();
1243         eth_dev->rx_pkt_burst = enic_recv_pkts;
1244         rte_mb();
1245
1246         /* restart Rx traffic */
1247         for (rq_idx = 0; rq_idx < enic->rq_count; rq_idx++) {
1248                 rq = &enic->rq[enic_rte_rq_idx_to_sop_idx(rq_idx)];
1249                 if (rq->is_sop && rq->in_use)
1250                         enic_start_rq(enic, rq_idx);
1251         }
1252
1253 set_mtu_done:
1254         dev_info(enic, "MTU changed from %u to %u\n",  old_mtu, new_mtu);
1255         rte_spinlock_unlock(&enic->mtu_lock);
1256         return rc;
1257 }
1258
1259 static int enic_dev_init(struct enic *enic)
1260 {
1261         int err;
1262         struct rte_eth_dev *eth_dev = enic->rte_dev;
1263
1264         vnic_dev_intr_coal_timer_info_default(enic->vdev);
1265
1266         /* Get vNIC configuration
1267         */
1268         err = enic_get_vnic_config(enic);
1269         if (err) {
1270                 dev_err(dev, "Get vNIC configuration failed, aborting\n");
1271                 return err;
1272         }
1273
1274         /* Get available resource counts */
1275         enic_get_res_counts(enic);
1276         if (enic->conf_rq_count == 1) {
1277                 dev_err(enic, "Running with only 1 RQ configured in the vNIC is not supported.\n");
1278                 dev_err(enic, "Please configure 2 RQs in the vNIC for each Rx queue used by DPDK.\n");
1279                 dev_err(enic, "See the ENIC PMD guide for more information.\n");
1280                 return -EINVAL;
1281         }
1282         /* Queue counts may be zeros. rte_zmalloc returns NULL in that case. */
1283         enic->cq = rte_zmalloc("enic_vnic_cq", sizeof(struct vnic_cq) *
1284                                enic->conf_cq_count, 8);
1285         enic->rq = rte_zmalloc("enic_vnic_rq", sizeof(struct vnic_rq) *
1286                                enic->conf_rq_count, 8);
1287         enic->wq = rte_zmalloc("enic_vnic_wq", sizeof(struct vnic_wq) *
1288                                enic->conf_wq_count, 8);
1289         if (enic->conf_cq_count > 0 && enic->cq == NULL) {
1290                 dev_err(enic, "failed to allocate vnic_cq, aborting.\n");
1291                 return -1;
1292         }
1293         if (enic->conf_rq_count > 0 && enic->rq == NULL) {
1294                 dev_err(enic, "failed to allocate vnic_rq, aborting.\n");
1295                 return -1;
1296         }
1297         if (enic->conf_wq_count > 0 && enic->wq == NULL) {
1298                 dev_err(enic, "failed to allocate vnic_wq, aborting.\n");
1299                 return -1;
1300         }
1301
1302         /* Get the supported filters */
1303         enic_fdir_info(enic);
1304
1305         eth_dev->data->mac_addrs = rte_zmalloc("enic_mac_addr", ETH_ALEN
1306                                                 * ENIC_MAX_MAC_ADDR, 0);
1307         if (!eth_dev->data->mac_addrs) {
1308                 dev_err(enic, "mac addr storage alloc failed, aborting.\n");
1309                 return -1;
1310         }
1311         ether_addr_copy((struct ether_addr *) enic->mac_addr,
1312                         eth_dev->data->mac_addrs);
1313
1314         vnic_dev_set_reset_flag(enic->vdev, 0);
1315
1316         LIST_INIT(&enic->flows);
1317         rte_spinlock_init(&enic->flows_lock);
1318
1319         /* set up link status checking */
1320         vnic_dev_notify_set(enic->vdev, -1); /* No Intr for notify */
1321
1322         return 0;
1323
1324 }
1325
1326 int enic_probe(struct enic *enic)
1327 {
1328         struct rte_pci_device *pdev = enic->pdev;
1329         int err = -1;
1330
1331         dev_debug(enic, " Initializing ENIC PMD\n");
1332
1333         /* if this is a secondary process the hardware is already initialized */
1334         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
1335                 return 0;
1336
1337         enic->bar0.vaddr = (void *)pdev->mem_resource[0].addr;
1338         enic->bar0.len = pdev->mem_resource[0].len;
1339
1340         /* Register vNIC device */
1341         enic->vdev = vnic_dev_register(NULL, enic, enic->pdev, &enic->bar0, 1);
1342         if (!enic->vdev) {
1343                 dev_err(enic, "vNIC registration failed, aborting\n");
1344                 goto err_out;
1345         }
1346
1347         LIST_INIT(&enic->memzone_list);
1348         rte_spinlock_init(&enic->memzone_list_lock);
1349
1350         vnic_register_cbacks(enic->vdev,
1351                 enic_alloc_consistent,
1352                 enic_free_consistent);
1353
1354         /* Issue device open to get device in known state */
1355         err = enic_dev_open(enic);
1356         if (err) {
1357                 dev_err(enic, "vNIC dev open failed, aborting\n");
1358                 goto err_out_unregister;
1359         }
1360
1361         /* Set ingress vlan rewrite mode before vnic initialization */
1362         err = vnic_dev_set_ig_vlan_rewrite_mode(enic->vdev,
1363                 IG_VLAN_REWRITE_MODE_PASS_THRU);
1364         if (err) {
1365                 dev_err(enic,
1366                         "Failed to set ingress vlan rewrite mode, aborting.\n");
1367                 goto err_out_dev_close;
1368         }
1369
1370         /* Issue device init to initialize the vnic-to-switch link.
1371          * We'll start with carrier off and wait for link UP
1372          * notification later to turn on carrier.  We don't need
1373          * to wait here for the vnic-to-switch link initialization
1374          * to complete; link UP notification is the indication that
1375          * the process is complete.
1376          */
1377
1378         err = vnic_dev_init(enic->vdev, 0);
1379         if (err) {
1380                 dev_err(enic, "vNIC dev init failed, aborting\n");
1381                 goto err_out_dev_close;
1382         }
1383
1384         err = enic_dev_init(enic);
1385         if (err) {
1386                 dev_err(enic, "Device initialization failed, aborting\n");
1387                 goto err_out_dev_close;
1388         }
1389
1390         return 0;
1391
1392 err_out_dev_close:
1393         vnic_dev_close(enic->vdev);
1394 err_out_unregister:
1395         vnic_dev_unregister(enic->vdev);
1396 err_out:
1397         return err;
1398 }
1399
1400 void enic_remove(struct enic *enic)
1401 {
1402         enic_dev_deinit(enic);
1403         vnic_dev_close(enic->vdev);
1404         vnic_dev_unregister(enic->vdev);
1405 }