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