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_data->in_use = 1;
 644         } else {
 645                 dev_info(enic, "Rq %u Scatter rx mode not being used\n",
 646                          queue_idx);
 647                 rq_data->in_use = 0;
 648         }
 649
 650         /* number of descriptors have to be a multiple of 32 */
 651         nb_sop_desc = (nb_desc / mbufs_per_pkt) & ~0x1F;
 652         nb_data_desc = (nb_desc - nb_sop_desc) & ~0x1F;
 653
 654         rq_sop->max_mbufs_per_pkt = mbufs_per_pkt;
 655         rq_data->max_mbufs_per_pkt = mbufs_per_pkt;
 656
 657         if (mbufs_per_pkt > 1) {
 658                 min_sop = 64;
 659                 max_sop = ((enic->config.rq_desc_count /
 660                             (mbufs_per_pkt - 1)) & ~0x1F);
 661                 min_data = min_sop * (mbufs_per_pkt - 1);
 662                 max_data = enic->config.rq_desc_count;
 663         } else {
 664                 min_sop = 64;
 665                 max_sop = enic->config.rq_desc_count;
 666                 min_data = 0;
 667                 max_data = 0;
 668         }
 669
 670         if (nb_desc < (min_sop + min_data)) {
 671                 dev_warning(enic,
 672                             "Number of rx descs too low, adjusting to minimum\n");
 673                 nb_sop_desc = min_sop;
 674                 nb_data_desc = min_data;
 675         } else if (nb_desc > (max_sop + max_data)) {
 676                 dev_warning(enic,
 677                             "Number of rx_descs too high, adjusting to maximum\n");
 678                 nb_sop_desc = max_sop;
 679                 nb_data_desc = max_data;
 680         }
 681         if (mbufs_per_pkt > 1) {
 682                 dev_info(enic, "For mtu %d and mbuf size %d valid rx descriptor range is %d to %d\n",
 683                          mtu, mbuf_size, min_sop + min_data,
 684                          max_sop + max_data);
 685         }
 686         dev_info(enic, "Using %d rx descriptors (sop %d, data %d)\n",
 687                  nb_sop_desc + nb_data_desc, nb_sop_desc, nb_data_desc);
 688
 689         /* Allocate sop queue resources */
 690         rc = vnic_rq_alloc(enic->vdev, rq_sop, sop_queue_idx,
 691                 nb_sop_desc, sizeof(struct rq_enet_desc));
 692         if (rc) {
 693                 dev_err(enic, "error in allocation of sop rq\n");
 694                 goto err_exit;
 695         }
 696         nb_sop_desc = rq_sop->ring.desc_count;
 697
 698         if (rq_data->in_use) {
 699                 /* Allocate data queue resources */
 700                 rc = vnic_rq_alloc(enic->vdev, rq_data, data_queue_idx,
 701                                    nb_data_desc,
 702                                    sizeof(struct rq_enet_desc));
 703                 if (rc) {
 704                         dev_err(enic, "error in allocation of data rq\n");
 705                         goto err_free_rq_sop;
 706                 }
 707                 nb_data_desc = rq_data->ring.desc_count;
 708         }
 709         rc = vnic_cq_alloc(enic->vdev, &enic->cq[queue_idx], queue_idx,
 710                            socket_id, nb_sop_desc + nb_data_desc,
 711                            sizeof(struct cq_enet_rq_desc));
 712         if (rc) {
 713                 dev_err(enic, "error in allocation of cq for rq\n");
 714                 goto err_free_rq_data;
 715         }
 716
 717         /* Allocate the mbuf rings */
 718         rq_sop->mbuf_ring = (struct rte_mbuf **)
 719                 rte_zmalloc_socket("rq->mbuf_ring",
 720                                    sizeof(struct rte_mbuf *) * nb_sop_desc,
 721                                    RTE_CACHE_LINE_SIZE, rq_sop->socket_id);
 722         if (rq_sop->mbuf_ring == NULL)
 723                 goto err_free_cq;
 724
 725         if (rq_data->in_use) {
 726                 rq_data->mbuf_ring = (struct rte_mbuf **)
 727                         rte_zmalloc_socket("rq->mbuf_ring",
 728                                 sizeof(struct rte_mbuf *) * nb_data_desc,
 729                                 RTE_CACHE_LINE_SIZE, rq_sop->socket_id);
 730                 if (rq_data->mbuf_ring == NULL)
 731                         goto err_free_sop_mbuf;
 732         }
 733
 734         rq_sop->tot_nb_desc = nb_desc; /* squirl away for MTU update function */
 735
 736         return 0;
 737
 738 err_free_sop_mbuf:
 739         rte_free(rq_sop->mbuf_ring);
 740 err_free_cq:
 741         /* cleanup on error */
 742         vnic_cq_free(&enic->cq[queue_idx]);
 743 err_free_rq_data:
 744         if (rq_data->in_use)
 745                 vnic_rq_free(rq_data);
 746 err_free_rq_sop:
 747         vnic_rq_free(rq_sop);
 748 err_exit:
 749         return -ENOMEM;
 750 }
 751
 752 void enic_free_wq(void *txq)
 753 {
 754         struct vnic_wq *wq;
 755         struct enic *enic;
 756
 757         if (txq == NULL)
 758                 return;
 759
 760         wq = (struct vnic_wq *)txq;
 761         enic = vnic_dev_priv(wq->vdev);
 762         rte_memzone_free(wq->cqmsg_rz);
 763         vnic_wq_free(wq);
 764         vnic_cq_free(&enic->cq[enic->rq_count + wq->index]);
 765 }
 766
 767 int enic_alloc_wq(struct enic *enic, uint16_t queue_idx,
 768         unsigned int socket_id, uint16_t nb_desc)
 769 {
 770         int err;
 771         struct vnic_wq *wq = &enic->wq[queue_idx];
 772         unsigned int cq_index = enic_cq_wq(enic, queue_idx);
 773         char name[NAME_MAX];
 774         static int instance;
 775
 776         wq->socket_id = socket_id;
 777         if (nb_desc) {
 778                 if (nb_desc > enic->config.wq_desc_count) {
 779                         dev_warning(enic,
 780                                 "WQ %d - number of tx desc in cmd line (%d)"\
 781                                 "is greater than that in the UCSM/CIMC adapter"\
 782                                 "policy.  Applying the value in the adapter "\
 783                                 "policy (%d)\n",
 784                                 queue_idx, nb_desc, enic->config.wq_desc_count);
 785                 } else if (nb_desc != enic->config.wq_desc_count) {
 786                         enic->config.wq_desc_count = nb_desc;
 787                         dev_info(enic,
 788                                 "TX Queues - effective number of descs:%d\n",
 789                                 nb_desc);
 790                 }
 791         }
 792
 793         /* Allocate queue resources */
 794         err = vnic_wq_alloc(enic->vdev, &enic->wq[queue_idx], queue_idx,
 795                 enic->config.wq_desc_count,
 796                 sizeof(struct wq_enet_desc));
 797         if (err) {
 798                 dev_err(enic, "error in allocation of wq\n");
 799                 return err;
 800         }
 801
 802         err = vnic_cq_alloc(enic->vdev, &enic->cq[cq_index], cq_index,
 803                 socket_id, enic->config.wq_desc_count,
 804                 sizeof(struct cq_enet_wq_desc));
 805         if (err) {
 806                 vnic_wq_free(wq);
 807                 dev_err(enic, "error in allocation of cq for wq\n");
 808         }
 809
 810         /* setup up CQ message */
 811         snprintf((char *)name, sizeof(name),
 812                  "vnic_cqmsg-%s-%d-%d", enic->bdf_name, queue_idx,
 813                 instance++);
 814
 815         wq->cqmsg_rz = rte_memzone_reserve_aligned((const char *)name,
 816                                                    sizeof(uint32_t),
 817                                                    SOCKET_ID_ANY, 0,
 818                                                    ENIC_ALIGN);
 819         if (!wq->cqmsg_rz)
 820                 return -ENOMEM;
 821
 822         return err;
 823 }
 824
 825 int enic_disable(struct enic *enic)
 826 {
 827         unsigned int i;
 828         int err;
 829
 830         vnic_intr_mask(&enic->intr);
 831         (void)vnic_intr_masked(&enic->intr); /* flush write */
 832         rte_intr_disable(&enic->pdev->intr_handle);
 833         rte_intr_callback_unregister(&enic->pdev->intr_handle,
 834                                      enic_intr_handler,
 835                                      (void *)enic->rte_dev);
 836
 837         vnic_dev_disable(enic->vdev);
 838
 839         enic_clsf_destroy(enic);
 840
 841         if (!enic_is_sriov_vf(enic))
 842                 vnic_dev_del_addr(enic->vdev, enic->mac_addr);
 843
 844         for (i = 0; i < enic->wq_count; i++) {
 845                 err = vnic_wq_disable(&enic->wq[i]);
 846                 if (err)
 847                         return err;
 848         }
 849         for (i = 0; i < enic_vnic_rq_count(enic); i++) {
 850                 if (enic->rq[i].in_use) {
 851                         err = vnic_rq_disable(&enic->rq[i]);
 852                         if (err)
 853                                 return err;
 854                 }
 855         }
 856
 857         /* If we were using interrupts, set the interrupt vector to -1
 858          * to disable interrupts.  We are not disabling link notifcations,
 859          * though, as we want the polling of link status to continue working.
 860          */
 861         if (enic->rte_dev->data->dev_conf.intr_conf.lsc)
 862                 vnic_dev_notify_set(enic->vdev, -1);
 863
 864         vnic_dev_set_reset_flag(enic->vdev, 1);
 865
 866         for (i = 0; i < enic->wq_count; i++)
 867                 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
 868
 869         for (i = 0; i < enic_vnic_rq_count(enic); i++)
 870                 if (enic->rq[i].in_use)
 871                         vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
 872         for (i = 0; i < enic->cq_count; i++)
 873                 vnic_cq_clean(&enic->cq[i]);
 874         vnic_intr_clean(&enic->intr);
 875
 876         return 0;
 877 }
 878
 879 static int enic_dev_wait(struct vnic_dev *vdev,
 880         int (*start)(struct vnic_dev *, int),
 881         int (*finished)(struct vnic_dev *, int *),
 882         int arg)
 883 {
 884         int done;
 885         int err;
 886         int i;
 887
 888         err = start(vdev, arg);
 889         if (err)
 890                 return err;
 891
 892         /* Wait for func to complete...2 seconds max */
 893         for (i = 0; i < 2000; i++) {
 894                 err = finished(vdev, &done);
 895                 if (err)
 896                         return err;
 897                 if (done)
 898                         return 0;
 899                 usleep(1000);
 900         }
 901         return -ETIMEDOUT;
 902 }
 903
 904 static int enic_dev_open(struct enic *enic)
 905 {
 906         int err;
 907
 908         err = enic_dev_wait(enic->vdev, vnic_dev_open,
 909                 vnic_dev_open_done, 0);
 910         if (err)
 911                 dev_err(enic_get_dev(enic),
 912                         "vNIC device open failed, err %d\n", err);
 913
 914         return err;
 915 }
 916
 917 static int enic_set_rsskey(struct enic *enic)
 918 {
 919         dma_addr_t rss_key_buf_pa;
 920         union vnic_rss_key *rss_key_buf_va = NULL;
 921         static union vnic_rss_key rss_key = {
 922                 .key = {
 923                         [0] = {.b = {85, 67, 83, 97, 119, 101, 115, 111, 109, 101}},
 924                         [1] = {.b = {80, 65, 76, 79, 117, 110, 105, 113, 117, 101}},
 925                         [2] = {.b = {76, 73, 78, 85, 88, 114, 111, 99, 107, 115}},
 926                         [3] = {.b = {69, 78, 73, 67, 105, 115, 99, 111, 111, 108}},
 927                 }
 928         };
 929         int err;
 930         u8 name[NAME_MAX];
 931
 932         snprintf((char *)name, NAME_MAX, "rss_key-%s", enic->bdf_name);
 933         rss_key_buf_va = enic_alloc_consistent(enic, sizeof(union vnic_rss_key),
 934                 &rss_key_buf_pa, name);
 935         if (!rss_key_buf_va)
 936                 return -ENOMEM;
 937
 938         rte_memcpy(rss_key_buf_va, &rss_key, sizeof(union vnic_rss_key));
 939
 940         err = enic_set_rss_key(enic,
 941                 rss_key_buf_pa,
 942                 sizeof(union vnic_rss_key));
 943
 944         enic_free_consistent(enic, sizeof(union vnic_rss_key),
 945                 rss_key_buf_va, rss_key_buf_pa);
 946
 947         return err;
 948 }
 949
 950 static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits)
 951 {
 952         dma_addr_t rss_cpu_buf_pa;
 953         union vnic_rss_cpu *rss_cpu_buf_va = NULL;
 954         int i;
 955         int err;
 956         u8 name[NAME_MAX];
 957
 958         snprintf((char *)name, NAME_MAX, "rss_cpu-%s", enic->bdf_name);
 959         rss_cpu_buf_va = enic_alloc_consistent(enic, sizeof(union vnic_rss_cpu),
 960                 &rss_cpu_buf_pa, name);
 961         if (!rss_cpu_buf_va)
 962                 return -ENOMEM;
 963
 964         for (i = 0; i < (1 << rss_hash_bits); i++)
 965                 (*rss_cpu_buf_va).cpu[i / 4].b[i % 4] =
 966                         enic_sop_rq(i % enic->rq_count);
 967
 968         err = enic_set_rss_cpu(enic,
 969                 rss_cpu_buf_pa,
 970                 sizeof(union vnic_rss_cpu));
 971
 972         enic_free_consistent(enic, sizeof(union vnic_rss_cpu),
 973                 rss_cpu_buf_va, rss_cpu_buf_pa);
 974
 975         return err;
 976 }
 977
 978 static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu,
 979         u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable)
 980 {
 981         const u8 tso_ipid_split_en = 0;
 982         int err;
 983
 984         /* Enable VLAN tag stripping */
 985
 986         err = enic_set_nic_cfg(enic,
 987                 rss_default_cpu, rss_hash_type,
 988                 rss_hash_bits, rss_base_cpu,
 989                 rss_enable, tso_ipid_split_en,
 990                 enic->ig_vlan_strip_en);
 991
 992         return err;
 993 }
 994
 995 int enic_set_rss_nic_cfg(struct enic *enic)
 996 {
 997         const u8 rss_default_cpu = 0;
 998         const u8 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 |
 999             NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 |
1000             NIC_CFG_RSS_HASH_TYPE_IPV6 |
1001             NIC_CFG_RSS_HASH_TYPE_TCP_IPV6;
1002         const u8 rss_hash_bits = 7;
1003         const u8 rss_base_cpu = 0;
1004         u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1);
1005
1006         if (rss_enable) {
1007                 if (!enic_set_rsskey(enic)) {
1008                         if (enic_set_rsscpu(enic, rss_hash_bits)) {
1009                                 rss_enable = 0;
1010                                 dev_warning(enic, "RSS disabled, "\
1011                                         "Failed to set RSS cpu indirection table.");
1012                         }
1013                 } else {
1014                         rss_enable = 0;
1015                         dev_warning(enic,
1016                                 "RSS disabled, Failed to set RSS key.\n");
1017                 }
1018         }
1019
1020         return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type,
1021                 rss_hash_bits, rss_base_cpu, rss_enable);
1022 }
1023
1024 int enic_setup_finish(struct enic *enic)
1025 {
1026         int ret;
1027
1028         enic_init_soft_stats(enic);
1029
1030         ret = enic_set_rss_nic_cfg(enic);
1031         if (ret) {
1032                 dev_err(enic, "Failed to config nic, aborting.\n");
1033                 return -1;
1034         }
1035
1036         /* Default conf */
1037         vnic_dev_packet_filter(enic->vdev,
1038                 1 /* directed  */,
1039                 1 /* multicast */,
1040                 1 /* broadcast */,
1041                 0 /* promisc   */,
1042                 1 /* allmulti  */);
1043
1044         enic->promisc = 0;
1045         enic->allmulti = 1;
1046
1047         return 0;
1048 }
1049
1050 void enic_add_packet_filter(struct enic *enic)
1051 {
1052         /* Args -> directed, multicast, broadcast, promisc, allmulti */
1053         vnic_dev_packet_filter(enic->vdev, 1, 1, 1,
1054                 enic->promisc, enic->allmulti);
1055 }
1056
1057 int enic_get_link_status(struct enic *enic)
1058 {
1059         return vnic_dev_link_status(enic->vdev);
1060 }
1061
1062 static void enic_dev_deinit(struct enic *enic)
1063 {
1064         struct rte_eth_dev *eth_dev = enic->rte_dev;
1065
1066         /* stop link status checking */
1067         vnic_dev_notify_unset(enic->vdev);
1068
1069         rte_free(eth_dev->data->mac_addrs);
1070 }
1071
1072
1073 int enic_set_vnic_res(struct enic *enic)
1074 {
1075         struct rte_eth_dev *eth_dev = enic->rte_dev;
1076         int rc = 0;
1077
1078         /* With Rx scatter support, two RQs are now used per RQ used by
1079          * the application.
1080          */
1081         if (enic->conf_rq_count < eth_dev->data->nb_rx_queues) {
1082                 dev_err(dev, "Not enough Receive queues. Requested:%u which uses %d RQs on VIC, Configured:%u\n",
1083                         eth_dev->data->nb_rx_queues,
1084                         eth_dev->data->nb_rx_queues * 2, enic->conf_rq_count);
1085                 rc = -EINVAL;
1086         }
1087         if (enic->conf_wq_count < eth_dev->data->nb_tx_queues) {
1088                 dev_err(dev, "Not enough Transmit queues. Requested:%u, Configured:%u\n",
1089                         eth_dev->data->nb_tx_queues, enic->conf_wq_count);
1090                 rc = -EINVAL;
1091         }
1092
1093         if (enic->conf_cq_count < (eth_dev->data->nb_rx_queues +
1094                                    eth_dev->data->nb_tx_queues)) {
1095                 dev_err(dev, "Not enough Completion queues. Required:%u, Configured:%u\n",
1096                         (eth_dev->data->nb_rx_queues +
1097                          eth_dev->data->nb_tx_queues), enic->conf_cq_count);
1098                 rc = -EINVAL;
1099         }
1100
1101         if (rc == 0) {
1102                 enic->rq_count = eth_dev->data->nb_rx_queues;
1103                 enic->wq_count = eth_dev->data->nb_tx_queues;
1104                 enic->cq_count = enic->rq_count + enic->wq_count;
1105         }
1106
1107         return rc;
1108 }
1109
1110 /* Initialize the completion queue for an RQ */
1111 static int
1112 enic_reinit_rq(struct enic *enic, unsigned int rq_idx)
1113 {
1114         struct vnic_rq *sop_rq, *data_rq;
1115         unsigned int cq_idx = enic_cq_rq(enic, rq_idx);
1116         int rc = 0;
1117
1118         sop_rq = &enic->rq[enic_sop_rq(rq_idx)];
1119         data_rq = &enic->rq[enic_data_rq(rq_idx)];
1120
1121         vnic_cq_clean(&enic->cq[cq_idx]);
1122         vnic_cq_init(&enic->cq[cq_idx],
1123                      0 /* flow_control_enable */,
1124                      1 /* color_enable */,
1125                      0 /* cq_head */,
1126                      0 /* cq_tail */,
1127                      1 /* cq_tail_color */,
1128                      0 /* interrupt_enable */,
1129                      1 /* cq_entry_enable */,
1130                      0 /* cq_message_enable */,
1131                      0 /* interrupt offset */,
1132                      0 /* cq_message_addr */);
1133
1134
1135         vnic_rq_init_start(sop_rq, enic_cq_rq(enic, enic_sop_rq(rq_idx)),
1136                            0, sop_rq->ring.desc_count - 1, 1, 0);
1137         if (data_rq->in_use) {
1138                 vnic_rq_init_start(data_rq,
1139                                    enic_cq_rq(enic, enic_data_rq(rq_idx)),
1140                                    0, data_rq->ring.desc_count - 1, 1, 0);
1141         }
1142
1143         rc = enic_alloc_rx_queue_mbufs(enic, sop_rq);
1144         if (rc)
1145                 return rc;
1146
1147         if (data_rq->in_use) {
1148                 rc = enic_alloc_rx_queue_mbufs(enic, data_rq);
1149                 if (rc) {
1150                         enic_rxmbuf_queue_release(enic, sop_rq);
1151                         return rc;
1152                 }
1153         }
1154
1155         return 0;
1156 }
1157
1158 /* The Cisco NIC can send and receive packets up to a max packet size
1159  * determined by the NIC type and firmware. There is also an MTU
1160  * configured into the NIC via the CIMC/UCSM management interface
1161  * which can be overridden by this function (up to the max packet size).
1162  * Depending on the network setup, doing so may cause packet drops
1163  * and unexpected behavior.
1164  */
1165 int enic_set_mtu(struct enic *enic, uint16_t new_mtu)
1166 {
1167         unsigned int rq_idx;
1168         struct vnic_rq *rq;
1169         int rc = 0;
1170         uint16_t old_mtu;       /* previous setting */
1171         uint16_t config_mtu;    /* Value configured into NIC via CIMC/UCSM */
1172         struct rte_eth_dev *eth_dev = enic->rte_dev;
1173
1174         old_mtu = eth_dev->data->mtu;
1175         config_mtu = enic->config.mtu;
1176
1177         if (new_mtu > enic->max_mtu) {
1178                 dev_err(enic,
1179                         "MTU not updated: requested (%u) greater than max (%u)\n",
1180                         new_mtu, enic->max_mtu);
1181                 return -EINVAL;
1182         }
1183         if (new_mtu < ENIC_MIN_MTU) {
1184                 dev_info(enic,
1185                         "MTU not updated: requested (%u) less than min (%u)\n",
1186                         new_mtu, ENIC_MIN_MTU);
1187                 return -EINVAL;
1188         }
1189         if (new_mtu > config_mtu)
1190                 dev_warning(enic,
1191                         "MTU (%u) is greater than value configured in NIC (%u)\n",
1192                         new_mtu, config_mtu);
1193
1194         /* The easy case is when scatter is disabled. However if the MTU
1195          * becomes greater than the mbuf data size, packet drops will ensue.
1196          */
1197         if (!enic->rte_dev->data->dev_conf.rxmode.enable_scatter) {
1198                 eth_dev->data->mtu = new_mtu;
1199                 goto set_mtu_done;
1200         }
1201
1202         /* Rx scatter is enabled so reconfigure RQ's on the fly. The point is to
1203          * change Rx scatter mode if necessary for better performance. I.e. if
1204          * MTU was greater than the mbuf size and now it's less, scatter Rx
1205          * doesn't have to be used and vice versa.
1206           */
1207         rte_spinlock_lock(&enic->mtu_lock);
1208
1209         /* Stop traffic on all RQs */
1210         for (rq_idx = 0; rq_idx < enic->rq_count * 2; rq_idx++) {
1211                 rq = &enic->rq[rq_idx];
1212                 if (rq->is_sop && rq->in_use) {
1213                         rc = enic_stop_rq(enic, enic_rq_sop(rq_idx));
1214                         if (rc) {
1215                                 dev_err(enic, "Failed to stop Rq %u\n", rq_idx);
1216                                 goto set_mtu_done;
1217                         }
1218                 }
1219         }
1220
1221         /* replace Rx funciton with a no-op to avoid getting stale pkts */
1222         eth_dev->rx_pkt_burst = enic_dummy_recv_pkts;
1223         rte_mb();
1224
1225         /* Allow time for threads to exit the real Rx function. */
1226         usleep(100000);
1227
1228         /* now it is safe to reconfigure the RQs */
1229
1230         /* update the mtu */
1231         eth_dev->data->mtu = new_mtu;
1232
1233         /* free and reallocate RQs with the new MTU */
1234         for (rq_idx = 0; rq_idx < enic->rq_count; rq_idx++) {
1235                 rq = &enic->rq[enic_sop_rq(rq_idx)];
1236
1237                 enic_free_rq(rq);
1238                 rc = enic_alloc_rq(enic, rq_idx, rq->socket_id, rq->mp,
1239                                    rq->tot_nb_desc);
1240                 if (rc) {
1241                         dev_err(enic,
1242                                 "Fatal MTU alloc error- No traffic will pass\n");
1243                         goto set_mtu_done;
1244                 }
1245
1246                 rc = enic_reinit_rq(enic, rq_idx);
1247                 if (rc) {
1248                         dev_err(enic,
1249                                 "Fatal MTU RQ reinit- No traffic will pass\n");
1250                         goto set_mtu_done;
1251                 }
1252         }
1253
1254         /* put back the real receive function */
1255         rte_mb();
1256         eth_dev->rx_pkt_burst = enic_recv_pkts;
1257         rte_mb();
1258
1259         /* restart Rx traffic */
1260         for (rq_idx = 0; rq_idx < enic->rq_count; rq_idx++) {
1261                 rq = &enic->rq[enic_sop_rq(rq_idx)];
1262                 if (rq->is_sop && rq->in_use)
1263                         enic_start_rq(enic, rq_idx);
1264         }
1265
1266 set_mtu_done:
1267         dev_info(enic, "MTU changed from %u to %u\n",  old_mtu, new_mtu);
1268         rte_spinlock_unlock(&enic->mtu_lock);
1269         return rc;
1270 }
1271
1272 static int enic_dev_init(struct enic *enic)
1273 {
1274         int err;
1275         struct rte_eth_dev *eth_dev = enic->rte_dev;
1276
1277         vnic_dev_intr_coal_timer_info_default(enic->vdev);
1278
1279         /* Get vNIC configuration
1280         */
1281         err = enic_get_vnic_config(enic);
1282         if (err) {
1283                 dev_err(dev, "Get vNIC configuration failed, aborting\n");
1284                 return err;
1285         }
1286
1287         /* Get available resource counts */
1288         enic_get_res_counts(enic);
1289         if (enic->conf_rq_count == 1) {
1290                 dev_err(enic, "Running with only 1 RQ configured in the vNIC is not supported.\n");
1291                 dev_err(enic, "Please configure 2 RQs in the vNIC for each Rx queue used by DPDK.\n");
1292                 dev_err(enic, "See the ENIC PMD guide for more information.\n");
1293                 return -EINVAL;
1294         }
1295
1296         /* Get the supported filters */
1297         enic_fdir_info(enic);
1298
1299         eth_dev->data->mac_addrs = rte_zmalloc("enic_mac_addr", ETH_ALEN, 0);
1300         if (!eth_dev->data->mac_addrs) {
1301                 dev_err(enic, "mac addr storage alloc failed, aborting.\n");
1302                 return -1;
1303         }
1304         ether_addr_copy((struct ether_addr *) enic->mac_addr,
1305                 &eth_dev->data->mac_addrs[0]);
1306
1307         vnic_dev_set_reset_flag(enic->vdev, 0);
1308
1309         /* set up link status checking */
1310         vnic_dev_notify_set(enic->vdev, -1); /* No Intr for notify */
1311
1312         return 0;
1313
1314 }
1315
1316 int enic_probe(struct enic *enic)
1317 {
1318         struct rte_pci_device *pdev = enic->pdev;
1319         int err = -1;
1320
1321         dev_debug(enic, " Initializing ENIC PMD\n");
1322
1323         enic->bar0.vaddr = (void *)pdev->mem_resource[0].addr;
1324         enic->bar0.len = pdev->mem_resource[0].len;
1325
1326         /* Register vNIC device */
1327         enic->vdev = vnic_dev_register(NULL, enic, enic->pdev, &enic->bar0, 1);
1328         if (!enic->vdev) {
1329                 dev_err(enic, "vNIC registration failed, aborting\n");
1330                 goto err_out;
1331         }
1332
1333         LIST_INIT(&enic->memzone_list);
1334         rte_spinlock_init(&enic->memzone_list_lock);
1335
1336         vnic_register_cbacks(enic->vdev,
1337                 enic_alloc_consistent,
1338                 enic_free_consistent);
1339
1340         /* Issue device open to get device in known state */
1341         err = enic_dev_open(enic);
1342         if (err) {
1343                 dev_err(enic, "vNIC dev open failed, aborting\n");
1344                 goto err_out_unregister;
1345         }
1346
1347         /* Set ingress vlan rewrite mode before vnic initialization */
1348         err = vnic_dev_set_ig_vlan_rewrite_mode(enic->vdev,
1349                 IG_VLAN_REWRITE_MODE_PASS_THRU);
1350         if (err) {
1351                 dev_err(enic,
1352                         "Failed to set ingress vlan rewrite mode, aborting.\n");
1353                 goto err_out_dev_close;
1354         }
1355
1356         /* Issue device init to initialize the vnic-to-switch link.
1357          * We'll start with carrier off and wait for link UP
1358          * notification later to turn on carrier.  We don't need
1359          * to wait here for the vnic-to-switch link initialization
1360          * to complete; link UP notification is the indication that
1361          * the process is complete.
1362          */
1363
1364         err = vnic_dev_init(enic->vdev, 0);
1365         if (err) {
1366                 dev_err(enic, "vNIC dev init failed, aborting\n");
1367                 goto err_out_dev_close;
1368         }
1369
1370         err = enic_dev_init(enic);
1371         if (err) {
1372                 dev_err(enic, "Device initialization failed, aborting\n");
1373                 goto err_out_dev_close;
1374         }
1375
1376         return 0;
1377
1378 err_out_dev_close:
1379         vnic_dev_close(enic->vdev);
1380 err_out_unregister:
1381         vnic_dev_unregister(enic->vdev);
1382 err_out:
1383         return err;
1384 }
1385
1386 void enic_remove(struct enic *enic)
1387 {
1388         enic_dev_deinit(enic);
1389         vnic_dev_close(enic->vdev);
1390         vnic_dev_unregister(enic->vdev);
1391 }