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