drivers/net/enic/enic_main.c

   1 /*
   2  * Copyright 2008-2014 Cisco Systems, Inc.  All rights reserved.
   3  * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
   4  *
   5  * Copyright (c) 2014, Cisco Systems, Inc.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  * notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  * notice, this list of conditions and the following disclaimer in
  17  * the documentation and/or other materials provided with the
  18  * distribution.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  23  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  24  * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  26  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  27  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  28  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  30  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  31  * POSSIBILITY OF SUCH DAMAGE.
  32  *
  33  */
  34
  35 #include <stdio.h>
  36
  37 #include <sys/stat.h>
  38 #include <sys/mman.h>
  39 #include <fcntl.h>
  40 #include <libgen.h>
  41
  42 #include <rte_pci.h>
  43 #include <rte_memzone.h>
  44 #include <rte_malloc.h>
  45 #include <rte_mbuf.h>
  46 #include <rte_string_fns.h>
  47 #include <rte_ethdev.h>
  48
  49 #include "enic_compat.h"
  50 #include "enic.h"
  51 #include "wq_enet_desc.h"
  52 #include "rq_enet_desc.h"
  53 #include "cq_enet_desc.h"
  54 #include "vnic_enet.h"
  55 #include "vnic_dev.h"
  56 #include "vnic_wq.h"
  57 #include "vnic_rq.h"
  58 #include "vnic_cq.h"
  59 #include "vnic_intr.h"
  60 #include "vnic_nic.h"
  61
  62 static inline int enic_is_sriov_vf(struct enic *enic)
  63 {
  64         return enic->pdev->id.device_id == PCI_DEVICE_ID_CISCO_VIC_ENET_VF;
  65 }
  66
  67 static int is_zero_addr(uint8_t *addr)
  68 {
  69         return !(addr[0] |  addr[1] | addr[2] | addr[3] | addr[4] | addr[5]);
  70 }
  71
  72 static int is_mcast_addr(uint8_t *addr)
  73 {
  74         return addr[0] & 1;
  75 }
  76
  77 static int is_eth_addr_valid(uint8_t *addr)
  78 {
  79         return !is_mcast_addr(addr) && !is_zero_addr(addr);
  80 }
  81
  82 static void
  83 enic_rxmbuf_queue_release(__rte_unused struct enic *enic, struct vnic_rq *rq)
  84 {
  85         uint16_t i;
  86
  87         if (!rq || !rq->mbuf_ring) {
  88                 dev_debug(enic, "Pointer to rq or mbuf_ring is NULL");
  89                 return;
  90         }
  91
  92         for (i = 0; i < rq->ring.desc_count; i++) {
  93                 if (rq->mbuf_ring[i]) {
  94                         rte_pktmbuf_free_seg(rq->mbuf_ring[i]);
  95                         rq->mbuf_ring[i] = NULL;
  96                 }
  97         }
  98 }
  99
 100 void enic_set_hdr_split_size(struct enic *enic, u16 split_hdr_size)
 101 {
 102         vnic_set_hdr_split_size(enic->vdev, split_hdr_size);
 103 }
 104
 105 static void enic_free_wq_buf(struct vnic_wq_buf *buf)
 106 {
 107         struct rte_mbuf *mbuf = (struct rte_mbuf *)buf->mb;
 108
 109         rte_pktmbuf_free_seg(mbuf);
 110         buf->mb = NULL;
 111 }
 112
 113 static void enic_log_q_error(struct enic *enic)
 114 {
 115         unsigned int i;
 116         u32 error_status;
 117
 118         for (i = 0; i < enic->wq_count; i++) {
 119                 error_status = vnic_wq_error_status(&enic->wq[i]);
 120                 if (error_status)
 121                         dev_err(enic, "WQ[%d] error_status %d\n", i,
 122                                 error_status);
 123         }
 124
 125         for (i = 0; i < enic_vnic_rq_count(enic); i++) {
 126                 if (!enic->rq[i].in_use)
 127                         continue;
 128                 error_status = vnic_rq_error_status(&enic->rq[i]);
 129                 if (error_status)
 130                         dev_err(enic, "RQ[%d] error_status %d\n", i,
 131                                 error_status);
 132         }
 133 }
 134
 135 static void enic_clear_soft_stats(struct enic *enic)
 136 {
 137         struct enic_soft_stats *soft_stats = &enic->soft_stats;
 138         rte_atomic64_clear(&soft_stats->rx_nombuf);
 139         rte_atomic64_clear(&soft_stats->rx_packet_errors);
 140 }
 141
 142 static void enic_init_soft_stats(struct enic *enic)
 143 {
 144         struct enic_soft_stats *soft_stats = &enic->soft_stats;
 145         rte_atomic64_init(&soft_stats->rx_nombuf);
 146         rte_atomic64_init(&soft_stats->rx_packet_errors);
 147         enic_clear_soft_stats(enic);
 148 }
 149
 150 void enic_dev_stats_clear(struct enic *enic)
 151 {
 152         if (vnic_dev_stats_clear(enic->vdev))
 153                 dev_err(enic, "Error in clearing stats\n");
 154         enic_clear_soft_stats(enic);
 155 }
 156
 157 void enic_dev_stats_get(struct enic *enic, struct rte_eth_stats *r_stats)
 158 {
 159         struct vnic_stats *stats;
 160         struct enic_soft_stats *soft_stats = &enic->soft_stats;
 161         int64_t rx_truncated;
 162         uint64_t rx_packet_errors;
 163
 164         if (vnic_dev_stats_dump(enic->vdev, &stats)) {
 165                 dev_err(enic, "Error in getting stats\n");
 166                 return;
 167         }
 168
 169         /* The number of truncated packets can only be calculated by
 170          * subtracting a hardware counter from error packets received by
 171          * the driver. Note: this causes transient inaccuracies in the
 172          * ipackets count. Also, the length of truncated packets are
 173          * counted in ibytes even though truncated packets are dropped
 174          * which can make ibytes be slightly higher than it should be.
 175          */
 176         rx_packet_errors = rte_atomic64_read(&soft_stats->rx_packet_errors);
 177         rx_truncated = rx_packet_errors - stats->rx.rx_errors -
 178                 stats->rx.rx_no_bufs;
 179
 180         r_stats->ipackets = stats->rx.rx_frames_ok - rx_truncated;
 181         r_stats->opackets = stats->tx.tx_frames_ok;
 182
 183         r_stats->ibytes = stats->rx.rx_bytes_ok;
 184         r_stats->obytes = stats->tx.tx_bytes_ok;
 185
 186         r_stats->ierrors = stats->rx.rx_errors + stats->rx.rx_drop;
 187         r_stats->oerrors = stats->tx.tx_errors;
 188
 189         r_stats->imissed = stats->rx.rx_no_bufs + rx_truncated;
 190
 191         r_stats->rx_nombuf = rte_atomic64_read(&soft_stats->rx_nombuf);
 192 }
 193
 194 void enic_del_mac_address(struct enic *enic)
 195 {
 196         if (vnic_dev_del_addr(enic->vdev, enic->mac_addr))
 197                 dev_err(enic, "del mac addr failed\n");
 198 }
 199
 200 void enic_set_mac_address(struct enic *enic, uint8_t *mac_addr)
 201 {
 202         int err;
 203
 204         if (!is_eth_addr_valid(mac_addr)) {
 205                 dev_err(enic, "invalid mac address\n");
 206                 return;
 207         }
 208
 209         err = vnic_dev_del_addr(enic->vdev, enic->mac_addr);
 210         if (err) {
 211                 dev_err(enic, "del mac addr failed\n");
 212                 return;
 213         }
 214
 215         ether_addr_copy((struct ether_addr *)mac_addr,
 216                 (struct ether_addr *)enic->mac_addr);
 217
 218         err = vnic_dev_add_addr(enic->vdev, mac_addr);
 219         if (err) {
 220                 dev_err(enic, "add mac addr failed\n");
 221                 return;
 222         }
 223 }
 224
 225 static void
 226 enic_free_rq_buf(struct rte_mbuf **mbuf)
 227 {
 228         if (*mbuf == NULL)
 229                 return;
 230
 231         rte_pktmbuf_free(*mbuf);
 232         mbuf = NULL;
 233 }
 234
 235 void enic_init_vnic_resources(struct enic *enic)
 236 {
 237         unsigned int error_interrupt_enable = 1;
 238         unsigned int error_interrupt_offset = 0;
 239         unsigned int index = 0;
 240         unsigned int cq_idx;
 241         struct vnic_rq *data_rq;
 242
 243         for (index = 0; index < enic->rq_count; index++) {
 244                 cq_idx = enic_cq_rq(enic, enic_sop_rq(index));
 245
 246                 vnic_rq_init(&enic->rq[enic_sop_rq(index)],
 247                         cq_idx,
 248                         error_interrupt_enable,
 249                         error_interrupt_offset);
 250
 251                 data_rq = &enic->rq[enic_data_rq(index)];
 252                 if (data_rq->in_use)
 253                         vnic_rq_init(data_rq,
 254                                      cq_idx,
 255                                      error_interrupt_enable,
 256                                      error_interrupt_offset);
 257
 258                 vnic_cq_init(&enic->cq[cq_idx],
 259                         0 /* flow_control_enable */,
 260                         1 /* color_enable */,
 261                         0 /* cq_head */,
 262                         0 /* cq_tail */,
 263                         1 /* cq_tail_color */,
 264                         0 /* interrupt_enable */,
 265                         1 /* cq_entry_enable */,
 266                         0 /* cq_message_enable */,
 267                         0 /* interrupt offset */,
 268                         0 /* cq_message_addr */);
 269         }
 270
 271         for (index = 0; index < enic->wq_count; index++) {
 272                 vnic_wq_init(&enic->wq[index],
 273                         enic_cq_wq(enic, index),
 274                         error_interrupt_enable,
 275                         error_interrupt_offset);
 276
 277                 cq_idx = enic_cq_wq(enic, index);
 278                 vnic_cq_init(&enic->cq[cq_idx],
 279                         0 /* flow_control_enable */,
 280                         1 /* color_enable */,
 281                         0 /* cq_head */,
 282                         0 /* cq_tail */,
 283                         1 /* cq_tail_color */,
 284                         0 /* interrupt_enable */,
 285                         0 /* cq_entry_enable */,
 286                         1 /* cq_message_enable */,
 287                         0 /* interrupt offset */,
 288                         (u64)enic->wq[index].cqmsg_rz->phys_addr);
 289         }
 290
 291         vnic_intr_init(&enic->intr,
 292                 enic->config.intr_timer_usec,
 293                 enic->config.intr_timer_type,
 294                 /*mask_on_assertion*/1);
 295 }
 296
 297
 298 static int
 299 enic_alloc_rx_queue_mbufs(struct enic *enic, struct vnic_rq *rq)
 300 {
 301         struct rte_mbuf *mb;
 302         struct rq_enet_desc *rqd = rq->ring.descs;
 303         unsigned i;
 304         dma_addr_t dma_addr;
 305
 306         if (!rq->in_use)
 307                 return 0;
 308
 309         dev_debug(enic, "queue %u, allocating %u rx queue mbufs\n", rq->index,
 310                   rq->ring.desc_count);
 311
 312         for (i = 0; i < rq->ring.desc_count; i++, rqd++) {
 313                 mb = rte_mbuf_raw_alloc(rq->mp);
 314                 if (mb == NULL) {
 315                         dev_err(enic, "RX mbuf alloc failed queue_id=%u\n",
 316                         (unsigned)rq->index);
 317                         return -ENOMEM;
 318                 }
 319
 320                 mb->data_off = RTE_PKTMBUF_HEADROOM;
 321                 dma_addr = (dma_addr_t)(mb->buf_physaddr
 322                            + RTE_PKTMBUF_HEADROOM);
 323                 rq_enet_desc_enc(rqd, dma_addr,
 324                                 (rq->is_sop ? RQ_ENET_TYPE_ONLY_SOP
 325                                 : RQ_ENET_TYPE_NOT_SOP),
 326                                 mb->buf_len - RTE_PKTMBUF_HEADROOM);
 327                 rq->mbuf_ring[i] = mb;
 328         }
 329
 330         /* make sure all prior writes are complete before doing the PIO write */
 331         rte_rmb();
 332
 333         /* Post all but the last buffer to VIC. */
 334         rq->posted_index = rq->ring.desc_count - 1;
 335
 336         rq->rx_nb_hold = 0;
 337
 338         dev_debug(enic, "port=%u, qidx=%u, Write %u posted idx, %u sw held\n",
 339                 enic->port_id, rq->index, rq->posted_index, rq->rx_nb_hold);
 340         iowrite32(rq->posted_index, &rq->ctrl->posted_index);
 341         iowrite32(0, &rq->ctrl->fetch_index);
 342         rte_rmb();
 343
 344         return 0;
 345
 346 }
 347
 348 static void *
 349 enic_alloc_consistent(void *priv, size_t size,
 350         dma_addr_t *dma_handle, u8 *name)
 351 {
 352         void *vaddr;
 353         const struct rte_memzone *rz;
 354         *dma_handle = 0;
 355         struct enic *enic = (struct enic *)priv;
 356         struct enic_memzone_entry *mze;
 357
 358         rz = rte_memzone_reserve_aligned((const char *)name,
 359                                          size, SOCKET_ID_ANY, 0, ENIC_ALIGN);
 360         if (!rz) {
 361                 pr_err("%s : Failed to allocate memory requested for %s\n",
 362                         __func__, name);
 363                 return NULL;
 364         }
 365
 366         vaddr = rz->addr;
 367         *dma_handle = (dma_addr_t)rz->phys_addr;
 368
 369         mze = rte_malloc("enic memzone entry",
 370                          sizeof(struct enic_memzone_entry), 0);
 371
 372         if (!mze) {
 373                 pr_err("%s : Failed to allocate memory for memzone list\n",
 374                        __func__);
 375                 rte_memzone_free(rz);
 376         }
 377
 378         mze->rz = rz;
 379
 380         rte_spinlock_lock(&enic->memzone_list_lock);
 381         LIST_INSERT_HEAD(&enic->memzone_list, mze, entries);
 382         rte_spinlock_unlock(&enic->memzone_list_lock);
 383
 384         return vaddr;
 385 }
 386
 387 static void
 388 enic_free_consistent(void *priv,
 389                      __rte_unused size_t size,
 390                      void *vaddr,
 391                      dma_addr_t dma_handle)
 392 {
 393         struct enic_memzone_entry *mze;
 394         struct enic *enic = (struct enic *)priv;
 395
 396         rte_spinlock_lock(&enic->memzone_list_lock);
 397         LIST_FOREACH(mze, &enic->memzone_list, entries) {
 398                 if (mze->rz->addr == vaddr &&
 399                     mze->rz->phys_addr == dma_handle)
 400                         break;
 401         }
 402         if (mze == NULL) {
 403                 rte_spinlock_unlock(&enic->memzone_list_lock);
 404                 dev_warning(enic,
 405                             "Tried to free memory, but couldn't find it in the memzone list\n");
 406                 return;
 407         }
 408         LIST_REMOVE(mze, entries);
 409         rte_spinlock_unlock(&enic->memzone_list_lock);
 410         rte_memzone_free(mze->rz);
 411         rte_free(mze);
 412 }
 413
 414 int enic_link_update(struct enic *enic)
 415 {
 416         struct rte_eth_dev *eth_dev = enic->rte_dev;
 417         int ret;
 418         int link_status = 0;
 419
 420         link_status = enic_get_link_status(enic);
 421         ret = (link_status == enic->link_status);
 422         enic->link_status = link_status;
 423         eth_dev->data->dev_link.link_status = link_status;
 424         eth_dev->data->dev_link.link_duplex = ETH_LINK_FULL_DUPLEX;
 425         eth_dev->data->dev_link.link_speed = vnic_dev_port_speed(enic->vdev);
 426         return ret;
 427 }
 428
 429 static void
 430 enic_intr_handler(__rte_unused struct rte_intr_handle *handle,
 431         void *arg)
 432 {
 433         struct rte_eth_dev *dev = (struct rte_eth_dev *)arg;
 434         struct enic *enic = pmd_priv(dev);
 435
 436         vnic_intr_return_all_credits(&enic->intr);
 437
 438         enic_link_update(enic);
 439         _rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL);
 440         enic_log_q_error(enic);
 441 }
 442
 443 int enic_enable(struct enic *enic)
 444 {
 445         unsigned int index;
 446         int err;
 447         struct rte_eth_dev *eth_dev = enic->rte_dev;
 448
 449         eth_dev->data->dev_link.link_speed = vnic_dev_port_speed(enic->vdev);
 450         eth_dev->data->dev_link.link_duplex = ETH_LINK_FULL_DUPLEX;
 451
 452         /* vnic notification of link status has already been turned on in
 453          * enic_dev_init() which is called during probe time.  Here we are
 454          * just turning on interrupt vector 0 if needed.
 455          */
 456         if (eth_dev->data->dev_conf.intr_conf.lsc)
 457                 vnic_dev_notify_set(enic->vdev, 0);
 458
 459         if (enic_clsf_init(enic))
 460                 dev_warning(enic, "Init of hash table for clsf failed."\
 461                         "Flow director feature will not work\n");
 462
 463         for (index = 0; index < enic->rq_count; index++) {
 464                 err = enic_alloc_rx_queue_mbufs(enic,
 465                         &enic->rq[enic_sop_rq(index)]);
 466                 if (err) {
 467                         dev_err(enic, "Failed to alloc sop RX queue mbufs\n");
 468                         return err;
 469                 }
 470                 err = enic_alloc_rx_queue_mbufs(enic,
 471                         &enic->rq[enic_data_rq(index)]);
 472                 if (err) {
 473                         /* release the allocated mbufs for the sop rq*/
 474                         enic_rxmbuf_queue_release(enic,
 475                                 &enic->rq[enic_sop_rq(index)]);
 476
 477                         dev_err(enic, "Failed to alloc data RX queue mbufs\n");
 478                         return err;
 479                 }
 480         }
 481
 482         for (index = 0; index < enic->wq_count; index++)
 483                 enic_start_wq(enic, index);
 484         for (index = 0; index < enic->rq_count; index++)
 485                 enic_start_rq(enic, index);
 486
 487         vnic_dev_add_addr(enic->vdev, enic->mac_addr);
 488
 489         vnic_dev_enable_wait(enic->vdev);
 490
 491         /* Register and enable error interrupt */
 492         rte_intr_callback_register(&(enic->pdev->intr_handle),
 493                 enic_intr_handler, (void *)enic->rte_dev);
 494
 495         rte_intr_enable(&(enic->pdev->intr_handle));
 496         vnic_intr_unmask(&enic->intr);
 497
 498         return 0;
 499 }
 500
 501 int enic_alloc_intr_resources(struct enic *enic)
 502 {
 503         int err;
 504
 505         dev_info(enic, "vNIC resources used:  "\
 506                 "wq %d rq %d cq %d intr %d\n",
 507                 enic->wq_count, enic_vnic_rq_count(enic),
 508                 enic->cq_count, enic->intr_count);
 509
 510         err = vnic_intr_alloc(enic->vdev, &enic->intr, 0);
 511         if (err)
 512                 enic_free_vnic_resources(enic);
 513
 514         return err;
 515 }
 516
 517 void enic_free_rq(void *rxq)
 518 {
 519         struct vnic_rq *rq_sop, *rq_data;
 520         struct enic *enic;
 521
 522         if (rxq == NULL)
 523                 return;
 524
 525         rq_sop = (struct vnic_rq *)rxq;
 526         enic = vnic_dev_priv(rq_sop->vdev);
 527         rq_data = &enic->rq[rq_sop->data_queue_idx];
 528
 529         enic_rxmbuf_queue_release(enic, rq_sop);
 530         if (rq_data->in_use)
 531                 enic_rxmbuf_queue_release(enic, rq_data);
 532
 533         rte_free(rq_sop->mbuf_ring);
 534         if (rq_data->in_use)
 535                 rte_free(rq_data->mbuf_ring);
 536
 537         rq_sop->mbuf_ring = NULL;
 538         rq_data->mbuf_ring = NULL;
 539
 540         vnic_rq_free(rq_sop);
 541         if (rq_data->in_use)
 542                 vnic_rq_free(rq_data);
 543
 544         vnic_cq_free(&enic->cq[rq_sop->index]);
 545
 546         rq_sop->in_use = 0;
 547         rq_data->in_use = 0;
 548 }
 549
 550 void enic_start_wq(struct enic *enic, uint16_t queue_idx)
 551 {
 552         struct rte_eth_dev *eth_dev = enic->rte_dev;
 553         vnic_wq_enable(&enic->wq[queue_idx]);
 554         eth_dev->data->tx_queue_state[queue_idx] = RTE_ETH_QUEUE_STATE_STARTED;
 555 }
 556
 557 int enic_stop_wq(struct enic *enic, uint16_t queue_idx)
 558 {
 559         struct rte_eth_dev *eth_dev = enic->rte_dev;
 560         int ret;
 561
 562         ret = vnic_wq_disable(&enic->wq[queue_idx]);
 563         if (ret)
 564                 return ret;
 565
 566         eth_dev->data->tx_queue_state[queue_idx] = RTE_ETH_QUEUE_STATE_STOPPED;
 567         return 0;
 568 }
 569
 570 void enic_start_rq(struct enic *enic, uint16_t queue_idx)
 571 {
 572         struct vnic_rq *rq_sop = &enic->rq[enic_sop_rq(queue_idx)];
 573         struct vnic_rq *rq_data = &enic->rq[rq_sop->data_queue_idx];
 574         struct rte_eth_dev *eth_dev = enic->rte_dev;
 575
 576         if (rq_data->in_use)
 577                 vnic_rq_enable(rq_data);
 578         rte_mb();
 579         vnic_rq_enable(rq_sop);
 580         eth_dev->data->rx_queue_state[queue_idx] = RTE_ETH_QUEUE_STATE_STARTED;
 581 }
 582
 583 int enic_stop_rq(struct enic *enic, uint16_t queue_idx)
 584 {
 585         int ret1 = 0, ret2 = 0;
 586         struct rte_eth_dev *eth_dev = enic->rte_dev;
 587         struct vnic_rq *rq_sop = &enic->rq[enic_sop_rq(queue_idx)];
 588         struct vnic_rq *rq_data = &enic->rq[rq_sop->data_queue_idx];
 589
 590         ret2 = vnic_rq_disable(rq_sop);
 591         rte_mb();
 592         if (rq_data->in_use)
 593                 ret1 = vnic_rq_disable(rq_data);
 594
 595         if (ret2)
 596                 return ret2;
 597         else if (ret1)
 598                 return ret1;
 599
 600         eth_dev->data->rx_queue_state[queue_idx] = RTE_ETH_QUEUE_STATE_STOPPED;
 601         return 0;
 602 }
 603
 604 int enic_alloc_rq(struct enic *enic, uint16_t queue_idx,
 605         unsigned int socket_id, struct rte_mempool *mp,
 606         uint16_t nb_desc)
 607 {
 608         int rc;
 609         uint16_t sop_queue_idx = enic_sop_rq(queue_idx);
 610         uint16_t data_queue_idx = enic_data_rq(queue_idx);
 611         struct vnic_rq *rq_sop = &enic->rq[sop_queue_idx];
 612         struct vnic_rq *rq_data = &enic->rq[data_queue_idx];
 613         unsigned int mbuf_size, mbufs_per_pkt;
 614         unsigned int nb_sop_desc, nb_data_desc;
 615         uint16_t min_sop, max_sop, min_data, max_data;
 616         uint16_t mtu = enic->rte_dev->data->mtu;
 617
 618         rq_sop->is_sop = 1;
 619         rq_sop->data_queue_idx = data_queue_idx;
 620         rq_data->is_sop = 0;
 621         rq_data->data_queue_idx = 0;
 622         rq_sop->socket_id = socket_id;
 623         rq_sop->mp = mp;
 624         rq_data->socket_id = socket_id;
 625         rq_data->mp = mp;
 626         rq_sop->in_use = 1;
 627
 628         mbuf_size = (uint16_t)(rte_pktmbuf_data_room_size(mp) -
 629                                RTE_PKTMBUF_HEADROOM);
 630
 631         if (enic->rte_dev->data->dev_conf.rxmode.enable_scatter) {
 632                 dev_info(enic, "Rq %u Scatter rx mode enabled\n", queue_idx);
 633                 /* ceil((mtu + ETHER_HDR_LEN + 4)/mbuf_size) */
 634                 mbufs_per_pkt = ((mtu + ETHER_HDR_LEN + 4) +
 635                                  (mbuf_size - 1)) / mbuf_size;
 636         } else {
 637                 dev_info(enic, "Scatter rx mode disabled\n");
 638                 mbufs_per_pkt = 1;
 639         }
 640
 641         if (mbufs_per_pkt > 1) {
 642                 dev_info(enic, "Rq %u Scatter rx mode in use\n", queue_idx);
 643                 rq_sop->data_queue_enable = 1;
 644                 rq_data->in_use = 1;
 645         } else {
 646                 dev_info(enic, "Rq %u Scatter rx mode not being used\n",
 647                          queue_idx);
 648                 rq_sop->data_queue_enable = 0;
 649                 rq_data->in_use = 0;
 650         }
 651
 652         /* number of descriptors have to be a multiple of 32 */
 653         nb_sop_desc = (nb_desc / mbufs_per_pkt) & ~0x1F;
 654         nb_data_desc = (nb_desc - nb_sop_desc) & ~0x1F;
 655
 656         rq_sop->max_mbufs_per_pkt = mbufs_per_pkt;
 657         rq_data->max_mbufs_per_pkt = mbufs_per_pkt;
 658
 659         if (mbufs_per_pkt > 1) {
 660                 min_sop = 64;
 661                 max_sop = ((enic->config.rq_desc_count /
 662                             (mbufs_per_pkt - 1)) & ~0x1F);
 663                 min_data = min_sop * (mbufs_per_pkt - 1);
 664                 max_data = enic->config.rq_desc_count;
 665         } else {
 666                 min_sop = 64;
 667                 max_sop = enic->config.rq_desc_count;
 668                 min_data = 0;
 669                 max_data = 0;
 670         }
 671
 672         if (nb_desc < (min_sop + min_data)) {
 673                 dev_warning(enic,
 674                             "Number of rx descs too low, adjusting to minimum\n");
 675                 nb_sop_desc = min_sop;
 676                 nb_data_desc = min_data;
 677         } else if (nb_desc > (max_sop + max_data)) {
 678                 dev_warning(enic,
 679                             "Number of rx_descs too high, adjusting to maximum\n");
 680                 nb_sop_desc = max_sop;
 681                 nb_data_desc = max_data;
 682         }
 683         if (mbufs_per_pkt > 1) {
 684                 dev_info(enic, "For mtu %d and mbuf size %d valid rx descriptor range is %d to %d\n",
 685                          mtu, mbuf_size, min_sop + min_data,
 686                          max_sop + max_data);
 687         }
 688         dev_info(enic, "Using %d rx descriptors (sop %d, data %d)\n",
 689                  nb_sop_desc + nb_data_desc, nb_sop_desc, nb_data_desc);
 690
 691         /* Allocate sop queue resources */
 692         rc = vnic_rq_alloc(enic->vdev, rq_sop, sop_queue_idx,
 693                 nb_sop_desc, sizeof(struct rq_enet_desc));
 694         if (rc) {
 695                 dev_err(enic, "error in allocation of sop rq\n");
 696                 goto err_exit;
 697         }
 698         nb_sop_desc = rq_sop->ring.desc_count;
 699
 700         if (rq_data->in_use) {
 701                 /* Allocate data queue resources */
 702                 rc = vnic_rq_alloc(enic->vdev, rq_data, data_queue_idx,
 703                                    nb_data_desc,
 704                                    sizeof(struct rq_enet_desc));
 705                 if (rc) {
 706                         dev_err(enic, "error in allocation of data rq\n");
 707                         goto err_free_rq_sop;
 708                 }
 709                 nb_data_desc = rq_data->ring.desc_count;
 710         }
 711         rc = vnic_cq_alloc(enic->vdev, &enic->cq[queue_idx], queue_idx,
 712                            socket_id, nb_sop_desc + nb_data_desc,
 713                            sizeof(struct cq_enet_rq_desc));
 714         if (rc) {
 715                 dev_err(enic, "error in allocation of cq for rq\n");
 716                 goto err_free_rq_data;
 717         }
 718
 719         /* Allocate the mbuf rings */
 720         rq_sop->mbuf_ring = (struct rte_mbuf **)
 721                 rte_zmalloc_socket("rq->mbuf_ring",
 722                                    sizeof(struct rte_mbuf *) * nb_sop_desc,
 723                                    RTE_CACHE_LINE_SIZE, rq_sop->socket_id);
 724         if (rq_sop->mbuf_ring == NULL)
 725                 goto err_free_cq;
 726
 727         if (rq_data->in_use) {
 728                 rq_data->mbuf_ring = (struct rte_mbuf **)
 729                         rte_zmalloc_socket("rq->mbuf_ring",
 730                                 sizeof(struct rte_mbuf *) * nb_data_desc,
 731                                 RTE_CACHE_LINE_SIZE, rq_sop->socket_id);
 732                 if (rq_data->mbuf_ring == NULL)
 733                         goto err_free_sop_mbuf;
 734         }
 735
 736         rq_sop->tot_nb_desc = nb_desc; /* squirl away for MTU update function */
 737
 738         return 0;
 739
 740 err_free_sop_mbuf:
 741         rte_free(rq_sop->mbuf_ring);
 742 err_free_cq:
 743         /* cleanup on error */
 744         vnic_cq_free(&enic->cq[queue_idx]);
 745 err_free_rq_data:
 746         if (rq_data->in_use)
 747                 vnic_rq_free(rq_data);
 748 err_free_rq_sop:
 749         vnic_rq_free(rq_sop);
 750 err_exit:
 751         return -ENOMEM;
 752 }
 753
 754 void enic_free_wq(void *txq)
 755 {
 756         struct vnic_wq *wq;
 757         struct enic *enic;
 758
 759         if (txq == NULL)
 760                 return;
 761
 762         wq = (struct vnic_wq *)txq;
 763         enic = vnic_dev_priv(wq->vdev);
 764         rte_memzone_free(wq->cqmsg_rz);
 765         vnic_wq_free(wq);
 766         vnic_cq_free(&enic->cq[enic->rq_count + wq->index]);
 767 }
 768
 769 int enic_alloc_wq(struct enic *enic, uint16_t queue_idx,
 770         unsigned int socket_id, uint16_t nb_desc)
 771 {
 772         int err;
 773         struct vnic_wq *wq = &enic->wq[queue_idx];
 774         unsigned int cq_index = enic_cq_wq(enic, queue_idx);
 775         char name[NAME_MAX];
 776         static int instance;
 777
 778         wq->socket_id = socket_id;
 779         if (nb_desc) {
 780                 if (nb_desc > enic->config.wq_desc_count) {
 781                         dev_warning(enic,
 782                                 "WQ %d - number of tx desc in cmd line (%d)"\
 783                                 "is greater than that in the UCSM/CIMC adapter"\
 784                                 "policy.  Applying the value in the adapter "\
 785                                 "policy (%d)\n",
 786                                 queue_idx, nb_desc, enic->config.wq_desc_count);
 787                 } else if (nb_desc != enic->config.wq_desc_count) {
 788                         enic->config.wq_desc_count = nb_desc;
 789                         dev_info(enic,
 790                                 "TX Queues - effective number of descs:%d\n",
 791                                 nb_desc);
 792                 }
 793         }
 794
 795         /* Allocate queue resources */
 796         err = vnic_wq_alloc(enic->vdev, &enic->wq[queue_idx], queue_idx,
 797                 enic->config.wq_desc_count,
 798                 sizeof(struct wq_enet_desc));
 799         if (err) {
 800                 dev_err(enic, "error in allocation of wq\n");
 801                 return err;
 802         }
 803
 804         err = vnic_cq_alloc(enic->vdev, &enic->cq[cq_index], cq_index,
 805                 socket_id, enic->config.wq_desc_count,
 806                 sizeof(struct cq_enet_wq_desc));
 807         if (err) {
 808                 vnic_wq_free(wq);
 809                 dev_err(enic, "error in allocation of cq for wq\n");
 810         }
 811
 812         /* setup up CQ message */
 813         snprintf((char *)name, sizeof(name),
 814                  "vnic_cqmsg-%s-%d-%d", enic->bdf_name, queue_idx,
 815                 instance++);
 816
 817         wq->cqmsg_rz = rte_memzone_reserve_aligned((const char *)name,
 818                                                    sizeof(uint32_t),
 819                                                    SOCKET_ID_ANY, 0,
 820                                                    ENIC_ALIGN);
 821         if (!wq->cqmsg_rz)
 822                 return -ENOMEM;
 823
 824         return err;
 825 }
 826
 827 int enic_disable(struct enic *enic)
 828 {
 829         unsigned int i;
 830         int err;
 831
 832         vnic_intr_mask(&enic->intr);
 833         (void)vnic_intr_masked(&enic->intr); /* flush write */
 834         rte_intr_disable(&enic->pdev->intr_handle);
 835         rte_intr_callback_unregister(&enic->pdev->intr_handle,
 836                                      enic_intr_handler,
 837                                      (void *)enic->rte_dev);
 838
 839         vnic_dev_disable(enic->vdev);
 840
 841         enic_clsf_destroy(enic);
 842
 843         if (!enic_is_sriov_vf(enic))
 844                 vnic_dev_del_addr(enic->vdev, enic->mac_addr);
 845
 846         for (i = 0; i < enic->wq_count; i++) {
 847                 err = vnic_wq_disable(&enic->wq[i]);
 848                 if (err)
 849                         return err;
 850         }
 851         for (i = 0; i < enic_vnic_rq_count(enic); i++) {
 852                 if (enic->rq[i].in_use) {
 853                         err = vnic_rq_disable(&enic->rq[i]);
 854                         if (err)
 855                                 return err;
 856                 }
 857         }
 858
 859         /* If we were using interrupts, set the interrupt vector to -1
 860          * to disable interrupts.  We are not disabling link notifcations,
 861          * though, as we want the polling of link status to continue working.
 862          */
 863         if (enic->rte_dev->data->dev_conf.intr_conf.lsc)
 864                 vnic_dev_notify_set(enic->vdev, -1);
 865
 866         vnic_dev_set_reset_flag(enic->vdev, 1);
 867
 868         for (i = 0; i < enic->wq_count; i++)
 869                 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
 870
 871         for (i = 0; i < enic_vnic_rq_count(enic); i++)
 872                 if (enic->rq[i].in_use)
 873                         vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
 874         for (i = 0; i < enic->cq_count; i++)
 875                 vnic_cq_clean(&enic->cq[i]);
 876         vnic_intr_clean(&enic->intr);
 877
 878         return 0;
 879 }
 880
 881 static int enic_dev_wait(struct vnic_dev *vdev,
 882         int (*start)(struct vnic_dev *, int),
 883         int (*finished)(struct vnic_dev *, int *),
 884         int arg)
 885 {
 886         int done;
 887         int err;
 888         int i;
 889
 890         err = start(vdev, arg);
 891         if (err)
 892                 return err;
 893
 894         /* Wait for func to complete...2 seconds max */
 895         for (i = 0; i < 2000; i++) {
 896                 err = finished(vdev, &done);
 897                 if (err)
 898                         return err;
 899                 if (done)
 900                         return 0;
 901                 usleep(1000);
 902         }
 903         return -ETIMEDOUT;
 904 }
 905
 906 static int enic_dev_open(struct enic *enic)
 907 {
 908         int err;
 909
 910         err = enic_dev_wait(enic->vdev, vnic_dev_open,
 911                 vnic_dev_open_done, 0);
 912         if (err)
 913                 dev_err(enic_get_dev(enic),
 914                         "vNIC device open failed, err %d\n", err);
 915
 916         return err;
 917 }
 918
 919 static int enic_set_rsskey(struct enic *enic)
 920 {
 921         dma_addr_t rss_key_buf_pa;
 922         union vnic_rss_key *rss_key_buf_va = NULL;
 923         static union vnic_rss_key rss_key = {
 924                 .key = {
 925                         [0] = {.b = {85, 67, 83, 97, 119, 101, 115, 111, 109, 101}},
 926                         [1] = {.b = {80, 65, 76, 79, 117, 110, 105, 113, 117, 101}},
 927                         [2] = {.b = {76, 73, 78, 85, 88, 114, 111, 99, 107, 115}},
 928                         [3] = {.b = {69, 78, 73, 67, 105, 115, 99, 111, 111, 108}},
 929                 }
 930         };
 931         int err;
 932         u8 name[NAME_MAX];
 933
 934         snprintf((char *)name, NAME_MAX, "rss_key-%s", enic->bdf_name);
 935         rss_key_buf_va = enic_alloc_consistent(enic, sizeof(union vnic_rss_key),
 936                 &rss_key_buf_pa, name);
 937         if (!rss_key_buf_va)
 938                 return -ENOMEM;
 939
 940         rte_memcpy(rss_key_buf_va, &rss_key, sizeof(union vnic_rss_key));
 941
 942         err = enic_set_rss_key(enic,
 943                 rss_key_buf_pa,
 944                 sizeof(union vnic_rss_key));
 945
 946         enic_free_consistent(enic, sizeof(union vnic_rss_key),
 947                 rss_key_buf_va, rss_key_buf_pa);
 948
 949         return err;
 950 }
 951
 952 static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits)
 953 {
 954         dma_addr_t rss_cpu_buf_pa;
 955         union vnic_rss_cpu *rss_cpu_buf_va = NULL;
 956         int i;
 957         int err;
 958         u8 name[NAME_MAX];
 959
 960         snprintf((char *)name, NAME_MAX, "rss_cpu-%s", enic->bdf_name);
 961         rss_cpu_buf_va = enic_alloc_consistent(enic, sizeof(union vnic_rss_cpu),
 962                 &rss_cpu_buf_pa, name);
 963         if (!rss_cpu_buf_va)
 964                 return -ENOMEM;
 965
 966         for (i = 0; i < (1 << rss_hash_bits); i++)
 967                 (*rss_cpu_buf_va).cpu[i / 4].b[i % 4] =
 968                         enic_sop_rq(i % enic->rq_count);
 969
 970         err = enic_set_rss_cpu(enic,
 971                 rss_cpu_buf_pa,
 972                 sizeof(union vnic_rss_cpu));
 973
 974         enic_free_consistent(enic, sizeof(union vnic_rss_cpu),
 975                 rss_cpu_buf_va, rss_cpu_buf_pa);
 976
 977         return err;
 978 }
 979
 980 static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu,
 981         u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable)
 982 {
 983         const u8 tso_ipid_split_en = 0;
 984         int err;
 985
 986         /* Enable VLAN tag stripping */
 987
 988         err = enic_set_nic_cfg(enic,
 989                 rss_default_cpu, rss_hash_type,
 990                 rss_hash_bits, rss_base_cpu,
 991                 rss_enable, tso_ipid_split_en,
 992                 enic->ig_vlan_strip_en);
 993
 994         return err;
 995 }
 996
 997 int enic_set_rss_nic_cfg(struct enic *enic)
 998 {
 999         const u8 rss_default_cpu = 0;
1000         const u8 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 |
1001             NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 |
1002             NIC_CFG_RSS_HASH_TYPE_IPV6 |
1003             NIC_CFG_RSS_HASH_TYPE_TCP_IPV6;
1004         const u8 rss_hash_bits = 7;
1005         const u8 rss_base_cpu = 0;
1006         u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1);
1007
1008         if (rss_enable) {
1009                 if (!enic_set_rsskey(enic)) {
1010                         if (enic_set_rsscpu(enic, rss_hash_bits)) {
1011                                 rss_enable = 0;
1012                                 dev_warning(enic, "RSS disabled, "\
1013                                         "Failed to set RSS cpu indirection table.");
1014                         }
1015                 } else {
1016                         rss_enable = 0;
1017                         dev_warning(enic,
1018                                 "RSS disabled, Failed to set RSS key.\n");
1019                 }
1020         }
1021
1022         return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type,
1023                 rss_hash_bits, rss_base_cpu, rss_enable);
1024 }
1025
1026 int enic_setup_finish(struct enic *enic)
1027 {
1028         int ret;
1029
1030         enic_init_soft_stats(enic);
1031
1032         ret = enic_set_rss_nic_cfg(enic);
1033         if (ret) {
1034                 dev_err(enic, "Failed to config nic, aborting.\n");
1035                 return -1;
1036         }
1037
1038         /* Default conf */
1039         vnic_dev_packet_filter(enic->vdev,
1040                 1 /* directed  */,
1041                 1 /* multicast */,
1042                 1 /* broadcast */,
1043                 0 /* promisc   */,
1044                 1 /* allmulti  */);
1045
1046         enic->promisc = 0;
1047         enic->allmulti = 1;
1048
1049         return 0;
1050 }
1051
1052 void enic_add_packet_filter(struct enic *enic)
1053 {
1054         /* Args -> directed, multicast, broadcast, promisc, allmulti */
1055         vnic_dev_packet_filter(enic->vdev, 1, 1, 1,
1056                 enic->promisc, enic->allmulti);
1057 }
1058
1059 int enic_get_link_status(struct enic *enic)
1060 {
1061         return vnic_dev_link_status(enic->vdev);
1062 }
1063
1064 static void enic_dev_deinit(struct enic *enic)
1065 {
1066         struct rte_eth_dev *eth_dev = enic->rte_dev;
1067
1068         /* stop link status checking */
1069         vnic_dev_notify_unset(enic->vdev);
1070
1071         rte_free(eth_dev->data->mac_addrs);
1072 }
1073
1074
1075 int enic_set_vnic_res(struct enic *enic)
1076 {
1077         struct rte_eth_dev *eth_dev = enic->rte_dev;
1078         int rc = 0;
1079
1080         /* With Rx scatter support, two RQs are now used per RQ used by
1081          * the application.
1082          */
1083         if (enic->conf_rq_count < eth_dev->data->nb_rx_queues) {
1084                 dev_err(dev, "Not enough Receive queues. Requested:%u which uses %d RQs on VIC, Configured:%u\n",
1085                         eth_dev->data->nb_rx_queues,
1086                         eth_dev->data->nb_rx_queues * 2, enic->conf_rq_count);
1087                 rc = -EINVAL;
1088         }
1089         if (enic->conf_wq_count < eth_dev->data->nb_tx_queues) {
1090                 dev_err(dev, "Not enough Transmit queues. Requested:%u, Configured:%u\n",
1091                         eth_dev->data->nb_tx_queues, enic->conf_wq_count);
1092                 rc = -EINVAL;
1093         }
1094
1095         if (enic->conf_cq_count < (eth_dev->data->nb_rx_queues +
1096                                    eth_dev->data->nb_tx_queues)) {
1097                 dev_err(dev, "Not enough Completion queues. Required:%u, Configured:%u\n",
1098                         (eth_dev->data->nb_rx_queues +
1099                          eth_dev->data->nb_tx_queues), enic->conf_cq_count);
1100                 rc = -EINVAL;
1101         }
1102
1103         if (rc == 0) {
1104                 enic->rq_count = eth_dev->data->nb_rx_queues;
1105                 enic->wq_count = eth_dev->data->nb_tx_queues;
1106                 enic->cq_count = enic->rq_count + enic->wq_count;
1107         }
1108
1109         return rc;
1110 }
1111
1112 /* Initialize the completion queue for an RQ */
1113 static int
1114 enic_reinit_rq(struct enic *enic, unsigned int rq_idx)
1115 {
1116         struct vnic_rq *sop_rq, *data_rq;
1117         unsigned int cq_idx = enic_cq_rq(enic, rq_idx);
1118         int rc = 0;
1119
1120         sop_rq = &enic->rq[enic_sop_rq(rq_idx)];
1121         data_rq = &enic->rq[enic_data_rq(rq_idx)];
1122
1123         vnic_cq_clean(&enic->cq[cq_idx]);
1124         vnic_cq_init(&enic->cq[cq_idx],
1125                      0 /* flow_control_enable */,
1126                      1 /* color_enable */,
1127                      0 /* cq_head */,
1128                      0 /* cq_tail */,
1129                      1 /* cq_tail_color */,
1130                      0 /* interrupt_enable */,
1131                      1 /* cq_entry_enable */,
1132                      0 /* cq_message_enable */,
1133                      0 /* interrupt offset */,
1134                      0 /* cq_message_addr */);
1135
1136
1137         vnic_rq_init_start(sop_rq, enic_cq_rq(enic, enic_sop_rq(rq_idx)),
1138                            0, sop_rq->ring.desc_count - 1, 1, 0);
1139         if (data_rq->in_use) {
1140                 vnic_rq_init_start(data_rq,
1141                                    enic_cq_rq(enic, enic_data_rq(rq_idx)),
1142                                    0, data_rq->ring.desc_count - 1, 1, 0);
1143         }
1144
1145         rc = enic_alloc_rx_queue_mbufs(enic, sop_rq);
1146         if (rc)
1147                 return rc;
1148
1149         if (data_rq->in_use) {
1150                 rc = enic_alloc_rx_queue_mbufs(enic, data_rq);
1151                 if (rc) {
1152                         enic_rxmbuf_queue_release(enic, sop_rq);
1153                         return rc;
1154                 }
1155         }
1156
1157         return 0;
1158 }
1159
1160 /* The Cisco NIC can send and receive packets up to a max packet size
1161  * determined by the NIC type and firmware. There is also an MTU
1162  * configured into the NIC via the CIMC/UCSM management interface
1163  * which can be overridden by this function (up to the max packet size).
1164  * Depending on the network setup, doing so may cause packet drops
1165  * and unexpected behavior.
1166  */
1167 int enic_set_mtu(struct enic *enic, uint16_t new_mtu)
1168 {
1169         unsigned int rq_idx;
1170         struct vnic_rq *rq;
1171         int rc = 0;
1172         uint16_t old_mtu;       /* previous setting */
1173         uint16_t config_mtu;    /* Value configured into NIC via CIMC/UCSM */
1174         struct rte_eth_dev *eth_dev = enic->rte_dev;
1175
1176         old_mtu = eth_dev->data->mtu;
1177         config_mtu = enic->config.mtu;
1178
1179         if (new_mtu > enic->max_mtu) {
1180                 dev_err(enic,
1181                         "MTU not updated: requested (%u) greater than max (%u)\n",
1182                         new_mtu, enic->max_mtu);
1183                 return -EINVAL;
1184         }
1185         if (new_mtu < ENIC_MIN_MTU) {
1186                 dev_info(enic,
1187                         "MTU not updated: requested (%u) less than min (%u)\n",
1188                         new_mtu, ENIC_MIN_MTU);
1189                 return -EINVAL;
1190         }
1191         if (new_mtu > config_mtu)
1192                 dev_warning(enic,
1193                         "MTU (%u) is greater than value configured in NIC (%u)\n",
1194                         new_mtu, config_mtu);
1195
1196         /* The easy case is when scatter is disabled. However if the MTU
1197          * becomes greater than the mbuf data size, packet drops will ensue.
1198          */
1199         if (!enic->rte_dev->data->dev_conf.rxmode.enable_scatter) {
1200                 eth_dev->data->mtu = new_mtu;
1201                 goto set_mtu_done;
1202         }
1203
1204         /* Rx scatter is enabled so reconfigure RQ's on the fly. The point is to
1205          * change Rx scatter mode if necessary for better performance. I.e. if
1206          * MTU was greater than the mbuf size and now it's less, scatter Rx
1207          * doesn't have to be used and vice versa.
1208           */
1209         rte_spinlock_lock(&enic->mtu_lock);
1210
1211         /* Stop traffic on all RQs */
1212         for (rq_idx = 0; rq_idx < enic->rq_count * 2; rq_idx++) {
1213                 rq = &enic->rq[rq_idx];
1214                 if (rq->is_sop && rq->in_use) {
1215                         rc = enic_stop_rq(enic, enic_rq_sop(rq_idx));
1216                         if (rc) {
1217                                 dev_err(enic, "Failed to stop Rq %u\n", rq_idx);
1218                                 goto set_mtu_done;
1219                         }
1220                 }
1221         }
1222
1223         /* replace Rx funciton with a no-op to avoid getting stale pkts */
1224         eth_dev->rx_pkt_burst = enic_dummy_recv_pkts;
1225         rte_mb();
1226
1227         /* Allow time for threads to exit the real Rx function. */
1228         usleep(100000);
1229
1230         /* now it is safe to reconfigure the RQs */
1231
1232         /* update the mtu */
1233         eth_dev->data->mtu = new_mtu;
1234
1235         /* free and reallocate RQs with the new MTU */
1236         for (rq_idx = 0; rq_idx < enic->rq_count; rq_idx++) {
1237                 rq = &enic->rq[enic_sop_rq(rq_idx)];
1238
1239                 enic_free_rq(rq);
1240                 rc = enic_alloc_rq(enic, rq_idx, rq->socket_id, rq->mp,
1241                                    rq->tot_nb_desc);
1242                 if (rc) {
1243                         dev_err(enic,
1244                                 "Fatal MTU alloc error- No traffic will pass\n");
1245                         goto set_mtu_done;
1246                 }
1247
1248                 rc = enic_reinit_rq(enic, rq_idx);
1249                 if (rc) {
1250                         dev_err(enic,
1251                                 "Fatal MTU RQ reinit- No traffic will pass\n");
1252                         goto set_mtu_done;
1253                 }
1254         }
1255
1256         /* put back the real receive function */
1257         rte_mb();
1258         eth_dev->rx_pkt_burst = enic_recv_pkts;
1259         rte_mb();
1260
1261         /* restart Rx traffic */
1262         for (rq_idx = 0; rq_idx < enic->rq_count; rq_idx++) {
1263                 rq = &enic->rq[enic_sop_rq(rq_idx)];
1264                 if (rq->is_sop && rq->in_use)
1265                         enic_start_rq(enic, rq_idx);
1266         }
1267
1268 set_mtu_done:
1269         dev_info(enic, "MTU changed from %u to %u\n",  old_mtu, new_mtu);
1270         rte_spinlock_unlock(&enic->mtu_lock);
1271         return rc;
1272 }
1273
1274 static int enic_dev_init(struct enic *enic)
1275 {
1276         int err;
1277         struct rte_eth_dev *eth_dev = enic->rte_dev;
1278
1279         vnic_dev_intr_coal_timer_info_default(enic->vdev);
1280
1281         /* Get vNIC configuration
1282         */
1283         err = enic_get_vnic_config(enic);
1284         if (err) {
1285                 dev_err(dev, "Get vNIC configuration failed, aborting\n");
1286                 return err;
1287         }
1288
1289         /* Get available resource counts */
1290         enic_get_res_counts(enic);
1291         if (enic->conf_rq_count == 1) {
1292                 dev_err(enic, "Running with only 1 RQ configured in the vNIC is not supported.\n");
1293                 dev_err(enic, "Please configure 2 RQs in the vNIC for each Rx queue used by DPDK.\n");
1294                 dev_err(enic, "See the ENIC PMD guide for more information.\n");
1295                 return -EINVAL;
1296         }
1297
1298         /* Get the supported filters */
1299         enic_fdir_info(enic);
1300
1301         eth_dev->data->mac_addrs = rte_zmalloc("enic_mac_addr", ETH_ALEN, 0);
1302         if (!eth_dev->data->mac_addrs) {
1303                 dev_err(enic, "mac addr storage alloc failed, aborting.\n");
1304                 return -1;
1305         }
1306         ether_addr_copy((struct ether_addr *) enic->mac_addr,
1307                 &eth_dev->data->mac_addrs[0]);
1308
1309         vnic_dev_set_reset_flag(enic->vdev, 0);
1310
1311         /* set up link status checking */
1312         vnic_dev_notify_set(enic->vdev, -1); /* No Intr for notify */
1313
1314         return 0;
1315
1316 }
1317
1318 int enic_probe(struct enic *enic)
1319 {
1320         struct rte_pci_device *pdev = enic->pdev;
1321         int err = -1;
1322
1323         dev_debug(enic, " Initializing ENIC PMD\n");
1324
1325         enic->bar0.vaddr = (void *)pdev->mem_resource[0].addr;
1326         enic->bar0.len = pdev->mem_resource[0].len;
1327
1328         /* Register vNIC device */
1329         enic->vdev = vnic_dev_register(NULL, enic, enic->pdev, &enic->bar0, 1);
1330         if (!enic->vdev) {
1331                 dev_err(enic, "vNIC registration failed, aborting\n");
1332                 goto err_out;
1333         }
1334
1335         LIST_INIT(&enic->memzone_list);
1336         rte_spinlock_init(&enic->memzone_list_lock);
1337
1338         vnic_register_cbacks(enic->vdev,
1339                 enic_alloc_consistent,
1340                 enic_free_consistent);
1341
1342         /* Issue device open to get device in known state */
1343         err = enic_dev_open(enic);
1344         if (err) {
1345                 dev_err(enic, "vNIC dev open failed, aborting\n");
1346                 goto err_out_unregister;
1347         }
1348
1349         /* Set ingress vlan rewrite mode before vnic initialization */
1350         err = vnic_dev_set_ig_vlan_rewrite_mode(enic->vdev,
1351                 IG_VLAN_REWRITE_MODE_PASS_THRU);
1352         if (err) {
1353                 dev_err(enic,
1354                         "Failed to set ingress vlan rewrite mode, aborting.\n");
1355                 goto err_out_dev_close;
1356         }
1357
1358         /* Issue device init to initialize the vnic-to-switch link.
1359          * We'll start with carrier off and wait for link UP
1360          * notification later to turn on carrier.  We don't need
1361          * to wait here for the vnic-to-switch link initialization
1362          * to complete; link UP notification is the indication that
1363          * the process is complete.
1364          */
1365
1366         err = vnic_dev_init(enic->vdev, 0);
1367         if (err) {
1368                 dev_err(enic, "vNIC dev init failed, aborting\n");
1369                 goto err_out_dev_close;
1370         }
1371
1372         err = enic_dev_init(enic);
1373         if (err) {
1374                 dev_err(enic, "Device initialization failed, aborting\n");
1375                 goto err_out_dev_close;
1376         }
1377
1378         return 0;
1379
1380 err_out_dev_close:
1381         vnic_dev_close(enic->vdev);
1382 err_out_unregister:
1383         vnic_dev_unregister(enic->vdev);
1384 err_out:
1385         return err;
1386 }
1387
1388 void enic_remove(struct enic *enic)
1389 {
1390         enic_dev_deinit(enic);
1391         vnic_dev_close(enic->vdev);
1392         vnic_dev_unregister(enic->vdev);
1393 }