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 int 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         int ret = vnic_dev_stats_dump(enic->vdev, &stats);
 166
 167         if (ret) {
 168                 dev_err(enic, "Error in getting stats\n");
 169                 return ret;
 170         }
 171
 172         /* The number of truncated packets can only be calculated by
 173          * subtracting a hardware counter from error packets received by
 174          * the driver. Note: this causes transient inaccuracies in the
 175          * ipackets count. Also, the length of truncated packets are
 176          * counted in ibytes even though truncated packets are dropped
 177          * which can make ibytes be slightly higher than it should be.
 178          */
 179         rx_packet_errors = rte_atomic64_read(&soft_stats->rx_packet_errors);
 180         rx_truncated = rx_packet_errors - stats->rx.rx_errors;
 181
 182         r_stats->ipackets = stats->rx.rx_frames_ok - rx_truncated;
 183         r_stats->opackets = stats->tx.tx_frames_ok;
 184
 185         r_stats->ibytes = stats->rx.rx_bytes_ok;
 186         r_stats->obytes = stats->tx.tx_bytes_ok;
 187
 188         r_stats->ierrors = stats->rx.rx_errors + stats->rx.rx_drop;
 189         r_stats->oerrors = stats->tx.tx_errors
 190                            + rte_atomic64_read(&soft_stats->tx_oversized);
 191
 192         r_stats->imissed = stats->rx.rx_no_bufs + rx_truncated;
 193
 194         r_stats->rx_nombuf = rte_atomic64_read(&soft_stats->rx_nombuf);
 195         return 0;
 196 }
 197
 198 void enic_del_mac_address(struct enic *enic, int mac_index)
 199 {
 200         struct rte_eth_dev *eth_dev = enic->rte_dev;
 201         uint8_t *mac_addr = eth_dev->data->mac_addrs[mac_index].addr_bytes;
 202
 203         if (vnic_dev_del_addr(enic->vdev, mac_addr))
 204                 dev_err(enic, "del mac addr failed\n");
 205 }
 206
 207 int enic_set_mac_address(struct enic *enic, uint8_t *mac_addr)
 208 {
 209         int err;
 210
 211         if (!is_eth_addr_valid(mac_addr)) {
 212                 dev_err(enic, "invalid mac address\n");
 213                 return -EINVAL;
 214         }
 215
 216         err = vnic_dev_add_addr(enic->vdev, mac_addr);
 217         if (err)
 218                 dev_err(enic, "add mac addr failed\n");
 219         return err;
 220 }
 221
 222 static void
 223 enic_free_rq_buf(struct rte_mbuf **mbuf)
 224 {
 225         if (*mbuf == NULL)
 226                 return;
 227
 228         rte_pktmbuf_free(*mbuf);
 229         *mbuf = NULL;
 230 }
 231
 232 void enic_init_vnic_resources(struct enic *enic)
 233 {
 234         unsigned int error_interrupt_enable = 1;
 235         unsigned int error_interrupt_offset = 0;
 236         unsigned int index = 0;
 237         unsigned int cq_idx;
 238         struct vnic_rq *data_rq;
 239
 240         for (index = 0; index < enic->rq_count; index++) {
 241                 cq_idx = enic_cq_rq(enic, enic_rte_rq_idx_to_sop_idx(index));
 242
 243                 vnic_rq_init(&enic->rq[enic_rte_rq_idx_to_sop_idx(index)],
 244                         cq_idx,
 245                         error_interrupt_enable,
 246                         error_interrupt_offset);
 247
 248                 data_rq = &enic->rq[enic_rte_rq_idx_to_data_idx(index)];
 249                 if (data_rq->in_use)
 250                         vnic_rq_init(data_rq,
 251                                      cq_idx,
 252                                      error_interrupt_enable,
 253                                      error_interrupt_offset);
 254
 255                 vnic_cq_init(&enic->cq[cq_idx],
 256                         0 /* flow_control_enable */,
 257                         1 /* color_enable */,
 258                         0 /* cq_head */,
 259                         0 /* cq_tail */,
 260                         1 /* cq_tail_color */,
 261                         0 /* interrupt_enable */,
 262                         1 /* cq_entry_enable */,
 263                         0 /* cq_message_enable */,
 264                         0 /* interrupt offset */,
 265                         0 /* cq_message_addr */);
 266         }
 267
 268         for (index = 0; index < enic->wq_count; index++) {
 269                 vnic_wq_init(&enic->wq[index],
 270                         enic_cq_wq(enic, index),
 271                         error_interrupt_enable,
 272                         error_interrupt_offset);
 273
 274                 cq_idx = enic_cq_wq(enic, index);
 275                 vnic_cq_init(&enic->cq[cq_idx],
 276                         0 /* flow_control_enable */,
 277                         1 /* color_enable */,
 278                         0 /* cq_head */,
 279                         0 /* cq_tail */,
 280                         1 /* cq_tail_color */,
 281                         0 /* interrupt_enable */,
 282                         0 /* cq_entry_enable */,
 283                         1 /* cq_message_enable */,
 284                         0 /* interrupt offset */,
 285                         (u64)enic->wq[index].cqmsg_rz->phys_addr);
 286         }
 287
 288         vnic_intr_init(&enic->intr,
 289                 enic->config.intr_timer_usec,
 290                 enic->config.intr_timer_type,
 291                 /*mask_on_assertion*/1);
 292 }
 293
 294
 295 static int
 296 enic_alloc_rx_queue_mbufs(struct enic *enic, struct vnic_rq *rq)
 297 {
 298         struct rte_mbuf *mb;
 299         struct rq_enet_desc *rqd = rq->ring.descs;
 300         unsigned i;
 301         dma_addr_t dma_addr;
 302
 303         if (!rq->in_use)
 304                 return 0;
 305
 306         dev_debug(enic, "queue %u, allocating %u rx queue mbufs\n", rq->index,
 307                   rq->ring.desc_count);
 308
 309         for (i = 0; i < rq->ring.desc_count; i++, rqd++) {
 310                 mb = rte_mbuf_raw_alloc(rq->mp);
 311                 if (mb == NULL) {
 312                         dev_err(enic, "RX mbuf alloc failed queue_id=%u\n",
 313                         (unsigned)rq->index);
 314                         return -ENOMEM;
 315                 }
 316
 317                 mb->data_off = RTE_PKTMBUF_HEADROOM;
 318                 dma_addr = (dma_addr_t)(mb->buf_physaddr
 319                            + RTE_PKTMBUF_HEADROOM);
 320                 rq_enet_desc_enc(rqd, dma_addr,
 321                                 (rq->is_sop ? RQ_ENET_TYPE_ONLY_SOP
 322                                 : RQ_ENET_TYPE_NOT_SOP),
 323                                 mb->buf_len - RTE_PKTMBUF_HEADROOM);
 324                 rq->mbuf_ring[i] = mb;
 325         }
 326
 327         /* make sure all prior writes are complete before doing the PIO write */
 328         rte_rmb();
 329
 330         /* Post all but the last buffer to VIC. */
 331         rq->posted_index = rq->ring.desc_count - 1;
 332
 333         rq->rx_nb_hold = 0;
 334
 335         dev_debug(enic, "port=%u, qidx=%u, Write %u posted idx, %u sw held\n",
 336                 enic->port_id, rq->index, rq->posted_index, rq->rx_nb_hold);
 337         iowrite32(rq->posted_index, &rq->ctrl->posted_index);
 338         iowrite32(0, &rq->ctrl->fetch_index);
 339         rte_rmb();
 340
 341         return 0;
 342
 343 }
 344
 345 static void *
 346 enic_alloc_consistent(void *priv, size_t size,
 347         dma_addr_t *dma_handle, u8 *name)
 348 {
 349         void *vaddr;
 350         const struct rte_memzone *rz;
 351         *dma_handle = 0;
 352         struct enic *enic = (struct enic *)priv;
 353         struct enic_memzone_entry *mze;
 354
 355         rz = rte_memzone_reserve_aligned((const char *)name,
 356                                          size, SOCKET_ID_ANY, 0, ENIC_ALIGN);
 357         if (!rz) {
 358                 pr_err("%s : Failed to allocate memory requested for %s\n",
 359                         __func__, name);
 360                 return NULL;
 361         }
 362
 363         vaddr = rz->addr;
 364         *dma_handle = (dma_addr_t)rz->phys_addr;
 365
 366         mze = rte_malloc("enic memzone entry",
 367                          sizeof(struct enic_memzone_entry), 0);
 368
 369         if (!mze) {
 370                 pr_err("%s : Failed to allocate memory for memzone list\n",
 371                        __func__);
 372                 rte_memzone_free(rz);
 373                 return NULL;
 374         }
 375
 376         mze->rz = rz;
 377
 378         rte_spinlock_lock(&enic->memzone_list_lock);
 379         LIST_INSERT_HEAD(&enic->memzone_list, mze, entries);
 380         rte_spinlock_unlock(&enic->memzone_list_lock);
 381
 382         return vaddr;
 383 }
 384
 385 static void
 386 enic_free_consistent(void *priv,
 387                      __rte_unused size_t size,
 388                      void *vaddr,
 389                      dma_addr_t dma_handle)
 390 {
 391         struct enic_memzone_entry *mze;
 392         struct enic *enic = (struct enic *)priv;
 393
 394         rte_spinlock_lock(&enic->memzone_list_lock);
 395         LIST_FOREACH(mze, &enic->memzone_list, entries) {
 396                 if (mze->rz->addr == vaddr &&
 397                     mze->rz->phys_addr == dma_handle)
 398                         break;
 399         }
 400         if (mze == NULL) {
 401                 rte_spinlock_unlock(&enic->memzone_list_lock);
 402                 dev_warning(enic,
 403                             "Tried to free memory, but couldn't find it in the memzone list\n");
 404                 return;
 405         }
 406         LIST_REMOVE(mze, entries);
 407         rte_spinlock_unlock(&enic->memzone_list_lock);
 408         rte_memzone_free(mze->rz);
 409         rte_free(mze);
 410 }
 411
 412 int enic_link_update(struct enic *enic)
 413 {
 414         struct rte_eth_dev *eth_dev = enic->rte_dev;
 415         int ret;
 416         int link_status = 0;
 417
 418         link_status = enic_get_link_status(enic);
 419         ret = (link_status == enic->link_status);
 420         enic->link_status = link_status;
 421         eth_dev->data->dev_link.link_status = link_status;
 422         eth_dev->data->dev_link.link_duplex = ETH_LINK_FULL_DUPLEX;
 423         eth_dev->data->dev_link.link_speed = vnic_dev_port_speed(enic->vdev);
 424         return ret;
 425 }
 426
 427 static void
 428 enic_intr_handler(void *arg)
 429 {
 430         struct rte_eth_dev *dev = (struct rte_eth_dev *)arg;
 431         struct enic *enic = pmd_priv(dev);
 432
 433         vnic_intr_return_all_credits(&enic->intr);
 434
 435         enic_link_update(enic);
 436         _rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL, NULL);
 437         enic_log_q_error(enic);
 438 }
 439
 440 int enic_enable(struct enic *enic)
 441 {
 442         unsigned int index;
 443         int err;
 444         struct rte_eth_dev *eth_dev = enic->rte_dev;
 445
 446         eth_dev->data->dev_link.link_speed = vnic_dev_port_speed(enic->vdev);
 447         eth_dev->data->dev_link.link_duplex = ETH_LINK_FULL_DUPLEX;
 448
 449         /* vnic notification of link status has already been turned on in
 450          * enic_dev_init() which is called during probe time.  Here we are
 451          * just turning on interrupt vector 0 if needed.
 452          */
 453         if (eth_dev->data->dev_conf.intr_conf.lsc)
 454                 vnic_dev_notify_set(enic->vdev, 0);
 455
 456         if (enic_clsf_init(enic))
 457                 dev_warning(enic, "Init of hash table for clsf failed."\
 458                         "Flow director feature will not work\n");
 459
 460         for (index = 0; index < enic->rq_count; index++) {
 461                 err = enic_alloc_rx_queue_mbufs(enic,
 462                         &enic->rq[enic_rte_rq_idx_to_sop_idx(index)]);
 463                 if (err) {
 464                         dev_err(enic, "Failed to alloc sop RX queue mbufs\n");
 465                         return err;
 466                 }
 467                 err = enic_alloc_rx_queue_mbufs(enic,
 468                         &enic->rq[enic_rte_rq_idx_to_data_idx(index)]);
 469                 if (err) {
 470                         /* release the allocated mbufs for the sop rq*/
 471                         enic_rxmbuf_queue_release(enic,
 472                                 &enic->rq[enic_rte_rq_idx_to_sop_idx(index)]);
 473
 474                         dev_err(enic, "Failed to alloc data RX queue mbufs\n");
 475                         return err;
 476                 }
 477         }
 478
 479         for (index = 0; index < enic->wq_count; index++)
 480                 enic_start_wq(enic, index);
 481         for (index = 0; index < enic->rq_count; index++)
 482                 enic_start_rq(enic, index);
 483
 484         vnic_dev_add_addr(enic->vdev, enic->mac_addr);
 485
 486         vnic_dev_enable_wait(enic->vdev);
 487
 488         /* Register and enable error interrupt */
 489         rte_intr_callback_register(&(enic->pdev->intr_handle),
 490                 enic_intr_handler, (void *)enic->rte_dev);
 491
 492         rte_intr_enable(&(enic->pdev->intr_handle));
 493         vnic_intr_unmask(&enic->intr);
 494
 495         return 0;
 496 }
 497
 498 int enic_alloc_intr_resources(struct enic *enic)
 499 {
 500         int err;
 501
 502         dev_info(enic, "vNIC resources used:  "\
 503                 "wq %d rq %d cq %d intr %d\n",
 504                 enic->wq_count, enic_vnic_rq_count(enic),
 505                 enic->cq_count, enic->intr_count);
 506
 507         err = vnic_intr_alloc(enic->vdev, &enic->intr, 0);
 508         if (err)
 509                 enic_free_vnic_resources(enic);
 510
 511         return err;
 512 }
 513
 514 void enic_free_rq(void *rxq)
 515 {
 516         struct vnic_rq *rq_sop, *rq_data;
 517         struct enic *enic;
 518
 519         if (rxq == NULL)
 520                 return;
 521
 522         rq_sop = (struct vnic_rq *)rxq;
 523         enic = vnic_dev_priv(rq_sop->vdev);
 524         rq_data = &enic->rq[rq_sop->data_queue_idx];
 525
 526         enic_rxmbuf_queue_release(enic, rq_sop);
 527         if (rq_data->in_use)
 528                 enic_rxmbuf_queue_release(enic, rq_data);
 529
 530         rte_free(rq_sop->mbuf_ring);
 531         if (rq_data->in_use)
 532                 rte_free(rq_data->mbuf_ring);
 533
 534         rq_sop->mbuf_ring = NULL;
 535         rq_data->mbuf_ring = NULL;
 536
 537         vnic_rq_free(rq_sop);
 538         if (rq_data->in_use)
 539                 vnic_rq_free(rq_data);
 540
 541         vnic_cq_free(&enic->cq[enic_sop_rq_idx_to_cq_idx(rq_sop->index)]);
 542
 543         rq_sop->in_use = 0;
 544         rq_data->in_use = 0;
 545 }
 546
 547 void enic_start_wq(struct enic *enic, uint16_t queue_idx)
 548 {
 549         struct rte_eth_dev *eth_dev = enic->rte_dev;
 550         vnic_wq_enable(&enic->wq[queue_idx]);
 551         eth_dev->data->tx_queue_state[queue_idx] = RTE_ETH_QUEUE_STATE_STARTED;
 552 }
 553
 554 int enic_stop_wq(struct enic *enic, uint16_t queue_idx)
 555 {
 556         struct rte_eth_dev *eth_dev = enic->rte_dev;
 557         int ret;
 558
 559         ret = vnic_wq_disable(&enic->wq[queue_idx]);
 560         if (ret)
 561                 return ret;
 562
 563         eth_dev->data->tx_queue_state[queue_idx] = RTE_ETH_QUEUE_STATE_STOPPED;
 564         return 0;
 565 }
 566
 567 void enic_start_rq(struct enic *enic, uint16_t queue_idx)
 568 {
 569         struct vnic_rq *rq_sop;
 570         struct vnic_rq *rq_data;
 571         rq_sop = &enic->rq[enic_rte_rq_idx_to_sop_idx(queue_idx)];
 572         rq_data = &enic->rq[rq_sop->data_queue_idx];
 573         struct rte_eth_dev *eth_dev = enic->rte_dev;
 574
 575         if (rq_data->in_use)
 576                 vnic_rq_enable(rq_data);
 577         rte_mb();
 578         vnic_rq_enable(rq_sop);
 579         eth_dev->data->rx_queue_state[queue_idx] = RTE_ETH_QUEUE_STATE_STARTED;
 580 }
 581
 582 int enic_stop_rq(struct enic *enic, uint16_t queue_idx)
 583 {
 584         int ret1 = 0, ret2 = 0;
 585         struct rte_eth_dev *eth_dev = enic->rte_dev;
 586         struct vnic_rq *rq_sop;
 587         struct vnic_rq *rq_data;
 588         rq_sop = &enic->rq[enic_rte_rq_idx_to_sop_idx(queue_idx)];
 589         rq_data = &enic->rq[rq_sop->data_queue_idx];
 590
 591         ret2 = vnic_rq_disable(rq_sop);
 592         rte_mb();
 593         if (rq_data->in_use)
 594                 ret1 = vnic_rq_disable(rq_data);
 595
 596         if (ret2)
 597                 return ret2;
 598         else if (ret1)
 599                 return ret1;
 600
 601         eth_dev->data->rx_queue_state[queue_idx] = RTE_ETH_QUEUE_STATE_STOPPED;
 602         return 0;
 603 }
 604
 605 int enic_alloc_rq(struct enic *enic, uint16_t queue_idx,
 606         unsigned int socket_id, struct rte_mempool *mp,
 607         uint16_t nb_desc, uint16_t free_thresh)
 608 {
 609         int rc;
 610         uint16_t sop_queue_idx = enic_rte_rq_idx_to_sop_idx(queue_idx);
 611         uint16_t data_queue_idx = enic_rte_rq_idx_to_data_idx(queue_idx);
 612         struct vnic_rq *rq_sop = &enic->rq[sop_queue_idx];
 613         struct vnic_rq *rq_data = &enic->rq[data_queue_idx];
 614         unsigned int mbuf_size, mbufs_per_pkt;
 615         unsigned int nb_sop_desc, nb_data_desc;
 616         uint16_t min_sop, max_sop, min_data, max_data;
 617         uint16_t mtu = enic->rte_dev->data->mtu;
 618
 619         rq_sop->is_sop = 1;
 620         rq_sop->data_queue_idx = data_queue_idx;
 621         rq_data->is_sop = 0;
 622         rq_data->data_queue_idx = 0;
 623         rq_sop->socket_id = socket_id;
 624         rq_sop->mp = mp;
 625         rq_data->socket_id = socket_id;
 626         rq_data->mp = mp;
 627         rq_sop->in_use = 1;
 628         rq_sop->rx_free_thresh = free_thresh;
 629         rq_data->rx_free_thresh = free_thresh;
 630         dev_debug(enic, "Set queue_id:%u free thresh:%u\n", queue_idx,
 631                   free_thresh);
 632
 633         mbuf_size = (uint16_t)(rte_pktmbuf_data_room_size(mp) -
 634                                RTE_PKTMBUF_HEADROOM);
 635
 636         if (enic->rte_dev->data->dev_conf.rxmode.enable_scatter) {
 637                 dev_info(enic, "Rq %u Scatter rx mode enabled\n", queue_idx);
 638                 /* ceil((mtu + ETHER_HDR_LEN + 4)/mbuf_size) */
 639                 mbufs_per_pkt = ((mtu + ETHER_HDR_LEN + 4) +
 640                                  (mbuf_size - 1)) / mbuf_size;
 641         } else {
 642                 dev_info(enic, "Scatter rx mode disabled\n");
 643                 mbufs_per_pkt = 1;
 644         }
 645
 646         if (mbufs_per_pkt > 1) {
 647                 dev_info(enic, "Rq %u Scatter rx mode in use\n", queue_idx);
 648                 rq_sop->data_queue_enable = 1;
 649                 rq_data->in_use = 1;
 650         } else {
 651                 dev_info(enic, "Rq %u Scatter rx mode not being used\n",
 652                          queue_idx);
 653                 rq_sop->data_queue_enable = 0;
 654                 rq_data->in_use = 0;
 655         }
 656
 657         /* number of descriptors have to be a multiple of 32 */
 658         nb_sop_desc = (nb_desc / mbufs_per_pkt) & ~0x1F;
 659         nb_data_desc = (nb_desc - nb_sop_desc) & ~0x1F;
 660
 661         rq_sop->max_mbufs_per_pkt = mbufs_per_pkt;
 662         rq_data->max_mbufs_per_pkt = mbufs_per_pkt;
 663
 664         if (mbufs_per_pkt > 1) {
 665                 min_sop = 64;
 666                 max_sop = ((enic->config.rq_desc_count /
 667                             (mbufs_per_pkt - 1)) & ~0x1F);
 668                 min_data = min_sop * (mbufs_per_pkt - 1);
 669                 max_data = enic->config.rq_desc_count;
 670         } else {
 671                 min_sop = 64;
 672                 max_sop = enic->config.rq_desc_count;
 673                 min_data = 0;
 674                 max_data = 0;
 675         }
 676
 677         if (nb_desc < (min_sop + min_data)) {
 678                 dev_warning(enic,
 679                             "Number of rx descs too low, adjusting to minimum\n");
 680                 nb_sop_desc = min_sop;
 681                 nb_data_desc = min_data;
 682         } else if (nb_desc > (max_sop + max_data)) {
 683                 dev_warning(enic,
 684                             "Number of rx_descs too high, adjusting to maximum\n");
 685                 nb_sop_desc = max_sop;
 686                 nb_data_desc = max_data;
 687         }
 688         if (mbufs_per_pkt > 1) {
 689                 dev_info(enic, "For mtu %d and mbuf size %d valid rx descriptor range is %d to %d\n",
 690                          mtu, mbuf_size, min_sop + min_data,
 691                          max_sop + max_data);
 692         }
 693         dev_info(enic, "Using %d rx descriptors (sop %d, data %d)\n",
 694                  nb_sop_desc + nb_data_desc, nb_sop_desc, nb_data_desc);
 695
 696         /* Allocate sop queue resources */
 697         rc = vnic_rq_alloc(enic->vdev, rq_sop, sop_queue_idx,
 698                 nb_sop_desc, sizeof(struct rq_enet_desc));
 699         if (rc) {
 700                 dev_err(enic, "error in allocation of sop rq\n");
 701                 goto err_exit;
 702         }
 703         nb_sop_desc = rq_sop->ring.desc_count;
 704
 705         if (rq_data->in_use) {
 706                 /* Allocate data queue resources */
 707                 rc = vnic_rq_alloc(enic->vdev, rq_data, data_queue_idx,
 708                                    nb_data_desc,
 709                                    sizeof(struct rq_enet_desc));
 710                 if (rc) {
 711                         dev_err(enic, "error in allocation of data rq\n");
 712                         goto err_free_rq_sop;
 713                 }
 714                 nb_data_desc = rq_data->ring.desc_count;
 715         }
 716         rc = vnic_cq_alloc(enic->vdev, &enic->cq[queue_idx], queue_idx,
 717                            socket_id, nb_sop_desc + nb_data_desc,
 718                            sizeof(struct cq_enet_rq_desc));
 719         if (rc) {
 720                 dev_err(enic, "error in allocation of cq for rq\n");
 721                 goto err_free_rq_data;
 722         }
 723
 724         /* Allocate the mbuf rings */
 725         rq_sop->mbuf_ring = (struct rte_mbuf **)
 726                 rte_zmalloc_socket("rq->mbuf_ring",
 727                                    sizeof(struct rte_mbuf *) * nb_sop_desc,
 728                                    RTE_CACHE_LINE_SIZE, rq_sop->socket_id);
 729         if (rq_sop->mbuf_ring == NULL)
 730                 goto err_free_cq;
 731
 732         if (rq_data->in_use) {
 733                 rq_data->mbuf_ring = (struct rte_mbuf **)
 734                         rte_zmalloc_socket("rq->mbuf_ring",
 735                                 sizeof(struct rte_mbuf *) * nb_data_desc,
 736                                 RTE_CACHE_LINE_SIZE, rq_sop->socket_id);
 737                 if (rq_data->mbuf_ring == NULL)
 738                         goto err_free_sop_mbuf;
 739         }
 740
 741         rq_sop->tot_nb_desc = nb_desc; /* squirl away for MTU update function */
 742
 743         return 0;
 744
 745 err_free_sop_mbuf:
 746         rte_free(rq_sop->mbuf_ring);
 747 err_free_cq:
 748         /* cleanup on error */
 749         vnic_cq_free(&enic->cq[queue_idx]);
 750 err_free_rq_data:
 751         if (rq_data->in_use)
 752                 vnic_rq_free(rq_data);
 753 err_free_rq_sop:
 754         vnic_rq_free(rq_sop);
 755 err_exit:
 756         return -ENOMEM;
 757 }
 758
 759 void enic_free_wq(void *txq)
 760 {
 761         struct vnic_wq *wq;
 762         struct enic *enic;
 763
 764         if (txq == NULL)
 765                 return;
 766
 767         wq = (struct vnic_wq *)txq;
 768         enic = vnic_dev_priv(wq->vdev);
 769         rte_memzone_free(wq->cqmsg_rz);
 770         vnic_wq_free(wq);
 771         vnic_cq_free(&enic->cq[enic->rq_count + wq->index]);
 772 }
 773
 774 int enic_alloc_wq(struct enic *enic, uint16_t queue_idx,
 775         unsigned int socket_id, uint16_t nb_desc)
 776 {
 777         int err;
 778         struct vnic_wq *wq = &enic->wq[queue_idx];
 779         unsigned int cq_index = enic_cq_wq(enic, queue_idx);
 780         char name[NAME_MAX];
 781         static int instance;
 782
 783         wq->socket_id = socket_id;
 784         if (nb_desc) {
 785                 if (nb_desc > enic->config.wq_desc_count) {
 786                         dev_warning(enic,
 787                                 "WQ %d - number of tx desc in cmd line (%d)"\
 788                                 "is greater than that in the UCSM/CIMC adapter"\
 789                                 "policy.  Applying the value in the adapter "\
 790                                 "policy (%d)\n",
 791                                 queue_idx, nb_desc, enic->config.wq_desc_count);
 792                 } else if (nb_desc != enic->config.wq_desc_count) {
 793                         enic->config.wq_desc_count = nb_desc;
 794                         dev_info(enic,
 795                                 "TX Queues - effective number of descs:%d\n",
 796                                 nb_desc);
 797                 }
 798         }
 799
 800         /* Allocate queue resources */
 801         err = vnic_wq_alloc(enic->vdev, &enic->wq[queue_idx], queue_idx,
 802                 enic->config.wq_desc_count,
 803                 sizeof(struct wq_enet_desc));
 804         if (err) {
 805                 dev_err(enic, "error in allocation of wq\n");
 806                 return err;
 807         }
 808
 809         err = vnic_cq_alloc(enic->vdev, &enic->cq[cq_index], cq_index,
 810                 socket_id, enic->config.wq_desc_count,
 811                 sizeof(struct cq_enet_wq_desc));
 812         if (err) {
 813                 vnic_wq_free(wq);
 814                 dev_err(enic, "error in allocation of cq for wq\n");
 815         }
 816
 817         /* setup up CQ message */
 818         snprintf((char *)name, sizeof(name),
 819                  "vnic_cqmsg-%s-%d-%d", enic->bdf_name, queue_idx,
 820                 instance++);
 821
 822         wq->cqmsg_rz = rte_memzone_reserve_aligned((const char *)name,
 823                                                    sizeof(uint32_t),
 824                                                    SOCKET_ID_ANY, 0,
 825                                                    ENIC_ALIGN);
 826         if (!wq->cqmsg_rz)
 827                 return -ENOMEM;
 828
 829         return err;
 830 }
 831
 832 int enic_disable(struct enic *enic)
 833 {
 834         unsigned int i;
 835         int err;
 836
 837         vnic_intr_mask(&enic->intr);
 838         (void)vnic_intr_masked(&enic->intr); /* flush write */
 839         rte_intr_disable(&enic->pdev->intr_handle);
 840         rte_intr_callback_unregister(&enic->pdev->intr_handle,
 841                                      enic_intr_handler,
 842                                      (void *)enic->rte_dev);
 843
 844         vnic_dev_disable(enic->vdev);
 845
 846         enic_clsf_destroy(enic);
 847
 848         if (!enic_is_sriov_vf(enic))
 849                 vnic_dev_del_addr(enic->vdev, enic->mac_addr);
 850
 851         for (i = 0; i < enic->wq_count; i++) {
 852                 err = vnic_wq_disable(&enic->wq[i]);
 853                 if (err)
 854                         return err;
 855         }
 856         for (i = 0; i < enic_vnic_rq_count(enic); i++) {
 857                 if (enic->rq[i].in_use) {
 858                         err = vnic_rq_disable(&enic->rq[i]);
 859                         if (err)
 860                                 return err;
 861                 }
 862         }
 863
 864         /* If we were using interrupts, set the interrupt vector to -1
 865          * to disable interrupts.  We are not disabling link notifcations,
 866          * though, as we want the polling of link status to continue working.
 867          */
 868         if (enic->rte_dev->data->dev_conf.intr_conf.lsc)
 869                 vnic_dev_notify_set(enic->vdev, -1);
 870
 871         vnic_dev_set_reset_flag(enic->vdev, 1);
 872
 873         for (i = 0; i < enic->wq_count; i++)
 874                 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
 875
 876         for (i = 0; i < enic_vnic_rq_count(enic); i++)
 877                 if (enic->rq[i].in_use)
 878                         vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
 879         for (i = 0; i < enic->cq_count; i++)
 880                 vnic_cq_clean(&enic->cq[i]);
 881         vnic_intr_clean(&enic->intr);
 882
 883         return 0;
 884 }
 885
 886 static int enic_dev_wait(struct vnic_dev *vdev,
 887         int (*start)(struct vnic_dev *, int),
 888         int (*finished)(struct vnic_dev *, int *),
 889         int arg)
 890 {
 891         int done;
 892         int err;
 893         int i;
 894
 895         err = start(vdev, arg);
 896         if (err)
 897                 return err;
 898
 899         /* Wait for func to complete...2 seconds max */
 900         for (i = 0; i < 2000; i++) {
 901                 err = finished(vdev, &done);
 902                 if (err)
 903                         return err;
 904                 if (done)
 905                         return 0;
 906                 usleep(1000);
 907         }
 908         return -ETIMEDOUT;
 909 }
 910
 911 static int enic_dev_open(struct enic *enic)
 912 {
 913         int err;
 914
 915         err = enic_dev_wait(enic->vdev, vnic_dev_open,
 916                 vnic_dev_open_done, 0);
 917         if (err)
 918                 dev_err(enic_get_dev(enic),
 919                         "vNIC device open failed, err %d\n", err);
 920
 921         return err;
 922 }
 923
 924 static int enic_set_rsskey(struct enic *enic)
 925 {
 926         dma_addr_t rss_key_buf_pa;
 927         union vnic_rss_key *rss_key_buf_va = NULL;
 928         static union vnic_rss_key rss_key = {
 929                 .key = {
 930                         [0] = {.b = {85, 67, 83, 97, 119, 101, 115, 111, 109, 101}},
 931                         [1] = {.b = {80, 65, 76, 79, 117, 110, 105, 113, 117, 101}},
 932                         [2] = {.b = {76, 73, 78, 85, 88, 114, 111, 99, 107, 115}},
 933                         [3] = {.b = {69, 78, 73, 67, 105, 115, 99, 111, 111, 108}},
 934                 }
 935         };
 936         int err;
 937         u8 name[NAME_MAX];
 938
 939         snprintf((char *)name, NAME_MAX, "rss_key-%s", enic->bdf_name);
 940         rss_key_buf_va = enic_alloc_consistent(enic, sizeof(union vnic_rss_key),
 941                 &rss_key_buf_pa, name);
 942         if (!rss_key_buf_va)
 943                 return -ENOMEM;
 944
 945         rte_memcpy(rss_key_buf_va, &rss_key, sizeof(union vnic_rss_key));
 946
 947         err = enic_set_rss_key(enic,
 948                 rss_key_buf_pa,
 949                 sizeof(union vnic_rss_key));
 950
 951         enic_free_consistent(enic, sizeof(union vnic_rss_key),
 952                 rss_key_buf_va, rss_key_buf_pa);
 953
 954         return err;
 955 }
 956
 957 static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits)
 958 {
 959         dma_addr_t rss_cpu_buf_pa;
 960         union vnic_rss_cpu *rss_cpu_buf_va = NULL;
 961         int i;
 962         int err;
 963         u8 name[NAME_MAX];
 964
 965         snprintf((char *)name, NAME_MAX, "rss_cpu-%s", enic->bdf_name);
 966         rss_cpu_buf_va = enic_alloc_consistent(enic, sizeof(union vnic_rss_cpu),
 967                 &rss_cpu_buf_pa, name);
 968         if (!rss_cpu_buf_va)
 969                 return -ENOMEM;
 970
 971         for (i = 0; i < (1 << rss_hash_bits); i++)
 972                 (*rss_cpu_buf_va).cpu[i / 4].b[i % 4] =
 973                         enic_rte_rq_idx_to_sop_idx(i % enic->rq_count);
 974
 975         err = enic_set_rss_cpu(enic,
 976                 rss_cpu_buf_pa,
 977                 sizeof(union vnic_rss_cpu));
 978
 979         enic_free_consistent(enic, sizeof(union vnic_rss_cpu),
 980                 rss_cpu_buf_va, rss_cpu_buf_pa);
 981
 982         return err;
 983 }
 984
 985 static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu,
 986         u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable)
 987 {
 988         const u8 tso_ipid_split_en = 0;
 989         int err;
 990
 991         /* Enable VLAN tag stripping */
 992
 993         err = enic_set_nic_cfg(enic,
 994                 rss_default_cpu, rss_hash_type,
 995                 rss_hash_bits, rss_base_cpu,
 996                 rss_enable, tso_ipid_split_en,
 997                 enic->ig_vlan_strip_en);
 998
 999         return err;
1000 }
1001
1002 int enic_set_rss_nic_cfg(struct enic *enic)
1003 {
1004         const u8 rss_default_cpu = 0;
1005         const u8 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 |
1006             NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 |
1007             NIC_CFG_RSS_HASH_TYPE_IPV6 |
1008             NIC_CFG_RSS_HASH_TYPE_TCP_IPV6;
1009         const u8 rss_hash_bits = 7;
1010         const u8 rss_base_cpu = 0;
1011         u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1);
1012
1013         if (rss_enable) {
1014                 if (!enic_set_rsskey(enic)) {
1015                         if (enic_set_rsscpu(enic, rss_hash_bits)) {
1016                                 rss_enable = 0;
1017                                 dev_warning(enic, "RSS disabled, "\
1018                                         "Failed to set RSS cpu indirection table.");
1019                         }
1020                 } else {
1021                         rss_enable = 0;
1022                         dev_warning(enic,
1023                                 "RSS disabled, Failed to set RSS key.\n");
1024                 }
1025         }
1026
1027         return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type,
1028                 rss_hash_bits, rss_base_cpu, rss_enable);
1029 }
1030
1031 int enic_setup_finish(struct enic *enic)
1032 {
1033         int ret;
1034
1035         enic_init_soft_stats(enic);
1036
1037         ret = enic_set_rss_nic_cfg(enic);
1038         if (ret) {
1039                 dev_err(enic, "Failed to config nic, aborting.\n");
1040                 return -1;
1041         }
1042
1043         /* Default conf */
1044         vnic_dev_packet_filter(enic->vdev,
1045                 1 /* directed  */,
1046                 1 /* multicast */,
1047                 1 /* broadcast */,
1048                 0 /* promisc   */,
1049                 1 /* allmulti  */);
1050
1051         enic->promisc = 0;
1052         enic->allmulti = 1;
1053
1054         return 0;
1055 }
1056
1057 void enic_add_packet_filter(struct enic *enic)
1058 {
1059         /* Args -> directed, multicast, broadcast, promisc, allmulti */
1060         vnic_dev_packet_filter(enic->vdev, 1, 1, 1,
1061                 enic->promisc, enic->allmulti);
1062 }
1063
1064 int enic_get_link_status(struct enic *enic)
1065 {
1066         return vnic_dev_link_status(enic->vdev);
1067 }
1068
1069 static void enic_dev_deinit(struct enic *enic)
1070 {
1071         struct rte_eth_dev *eth_dev = enic->rte_dev;
1072
1073         /* stop link status checking */
1074         vnic_dev_notify_unset(enic->vdev);
1075
1076         rte_free(eth_dev->data->mac_addrs);
1077 }
1078
1079
1080 int enic_set_vnic_res(struct enic *enic)
1081 {
1082         struct rte_eth_dev *eth_dev = enic->rte_dev;
1083         int rc = 0;
1084
1085         /* With Rx scatter support, two RQs are now used per RQ used by
1086          * the application.
1087          */
1088         if (enic->conf_rq_count < eth_dev->data->nb_rx_queues) {
1089                 dev_err(dev, "Not enough Receive queues. Requested:%u which uses %d RQs on VIC, Configured:%u\n",
1090                         eth_dev->data->nb_rx_queues,
1091                         eth_dev->data->nb_rx_queues * 2, enic->conf_rq_count);
1092                 rc = -EINVAL;
1093         }
1094         if (enic->conf_wq_count < eth_dev->data->nb_tx_queues) {
1095                 dev_err(dev, "Not enough Transmit queues. Requested:%u, Configured:%u\n",
1096                         eth_dev->data->nb_tx_queues, enic->conf_wq_count);
1097                 rc = -EINVAL;
1098         }
1099
1100         if (enic->conf_cq_count < (eth_dev->data->nb_rx_queues +
1101                                    eth_dev->data->nb_tx_queues)) {
1102                 dev_err(dev, "Not enough Completion queues. Required:%u, Configured:%u\n",
1103                         (eth_dev->data->nb_rx_queues +
1104                          eth_dev->data->nb_tx_queues), enic->conf_cq_count);
1105                 rc = -EINVAL;
1106         }
1107
1108         if (rc == 0) {
1109                 enic->rq_count = eth_dev->data->nb_rx_queues;
1110                 enic->wq_count = eth_dev->data->nb_tx_queues;
1111                 enic->cq_count = enic->rq_count + enic->wq_count;
1112         }
1113
1114         return rc;
1115 }
1116
1117 /* Initialize the completion queue for an RQ */
1118 static int
1119 enic_reinit_rq(struct enic *enic, unsigned int rq_idx)
1120 {
1121         struct vnic_rq *sop_rq, *data_rq;
1122         unsigned int cq_idx = enic_cq_rq(enic, rq_idx);
1123         int rc = 0;
1124
1125         sop_rq = &enic->rq[enic_rte_rq_idx_to_sop_idx(rq_idx)];
1126         data_rq = &enic->rq[enic_rte_rq_idx_to_data_idx(rq_idx)];
1127
1128         vnic_cq_clean(&enic->cq[cq_idx]);
1129         vnic_cq_init(&enic->cq[cq_idx],
1130                      0 /* flow_control_enable */,
1131                      1 /* color_enable */,
1132                      0 /* cq_head */,
1133                      0 /* cq_tail */,
1134                      1 /* cq_tail_color */,
1135                      0 /* interrupt_enable */,
1136                      1 /* cq_entry_enable */,
1137                      0 /* cq_message_enable */,
1138                      0 /* interrupt offset */,
1139                      0 /* cq_message_addr */);
1140
1141
1142         vnic_rq_init_start(sop_rq, enic_cq_rq(enic,
1143                            enic_rte_rq_idx_to_sop_idx(rq_idx)), 0,
1144                            sop_rq->ring.desc_count - 1, 1, 0);
1145         if (data_rq->in_use) {
1146                 vnic_rq_init_start(data_rq,
1147                                    enic_cq_rq(enic,
1148                                    enic_rte_rq_idx_to_data_idx(rq_idx)), 0,
1149                                    data_rq->ring.desc_count - 1, 1, 0);
1150         }
1151
1152         rc = enic_alloc_rx_queue_mbufs(enic, sop_rq);
1153         if (rc)
1154                 return rc;
1155
1156         if (data_rq->in_use) {
1157                 rc = enic_alloc_rx_queue_mbufs(enic, data_rq);
1158                 if (rc) {
1159                         enic_rxmbuf_queue_release(enic, sop_rq);
1160                         return rc;
1161                 }
1162         }
1163
1164         return 0;
1165 }
1166
1167 /* The Cisco NIC can send and receive packets up to a max packet size
1168  * determined by the NIC type and firmware. There is also an MTU
1169  * configured into the NIC via the CIMC/UCSM management interface
1170  * which can be overridden by this function (up to the max packet size).
1171  * Depending on the network setup, doing so may cause packet drops
1172  * and unexpected behavior.
1173  */
1174 int enic_set_mtu(struct enic *enic, uint16_t new_mtu)
1175 {
1176         unsigned int rq_idx;
1177         struct vnic_rq *rq;
1178         int rc = 0;
1179         uint16_t old_mtu;       /* previous setting */
1180         uint16_t config_mtu;    /* Value configured into NIC via CIMC/UCSM */
1181         struct rte_eth_dev *eth_dev = enic->rte_dev;
1182
1183         old_mtu = eth_dev->data->mtu;
1184         config_mtu = enic->config.mtu;
1185
1186         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
1187                 return -E_RTE_SECONDARY;
1188
1189         if (new_mtu > enic->max_mtu) {
1190                 dev_err(enic,
1191                         "MTU not updated: requested (%u) greater than max (%u)\n",
1192                         new_mtu, enic->max_mtu);
1193                 return -EINVAL;
1194         }
1195         if (new_mtu < ENIC_MIN_MTU) {
1196                 dev_info(enic,
1197                         "MTU not updated: requested (%u) less than min (%u)\n",
1198                         new_mtu, ENIC_MIN_MTU);
1199                 return -EINVAL;
1200         }
1201         if (new_mtu > config_mtu)
1202                 dev_warning(enic,
1203                         "MTU (%u) is greater than value configured in NIC (%u)\n",
1204                         new_mtu, config_mtu);
1205
1206         /* The easy case is when scatter is disabled. However if the MTU
1207          * becomes greater than the mbuf data size, packet drops will ensue.
1208          */
1209         if (!enic->rte_dev->data->dev_conf.rxmode.enable_scatter) {
1210                 eth_dev->data->mtu = new_mtu;
1211                 goto set_mtu_done;
1212         }
1213
1214         /* Rx scatter is enabled so reconfigure RQ's on the fly. The point is to
1215          * change Rx scatter mode if necessary for better performance. I.e. if
1216          * MTU was greater than the mbuf size and now it's less, scatter Rx
1217          * doesn't have to be used and vice versa.
1218           */
1219         rte_spinlock_lock(&enic->mtu_lock);
1220
1221         /* Stop traffic on all RQs */
1222         for (rq_idx = 0; rq_idx < enic->rq_count * 2; rq_idx++) {
1223                 rq = &enic->rq[rq_idx];
1224                 if (rq->is_sop && rq->in_use) {
1225                         rc = enic_stop_rq(enic,
1226                                           enic_sop_rq_idx_to_rte_idx(rq_idx));
1227                         if (rc) {
1228                                 dev_err(enic, "Failed to stop Rq %u\n", rq_idx);
1229                                 goto set_mtu_done;
1230                         }
1231                 }
1232         }
1233
1234         /* replace Rx function with a no-op to avoid getting stale pkts */
1235         eth_dev->rx_pkt_burst = enic_dummy_recv_pkts;
1236         rte_mb();
1237
1238         /* Allow time for threads to exit the real Rx function. */
1239         usleep(100000);
1240
1241         /* now it is safe to reconfigure the RQs */
1242
1243         /* update the mtu */
1244         eth_dev->data->mtu = new_mtu;
1245
1246         /* free and reallocate RQs with the new MTU */
1247         for (rq_idx = 0; rq_idx < enic->rq_count; rq_idx++) {
1248                 rq = &enic->rq[enic_rte_rq_idx_to_sop_idx(rq_idx)];
1249
1250                 enic_free_rq(rq);
1251                 rc = enic_alloc_rq(enic, rq_idx, rq->socket_id, rq->mp,
1252                                    rq->tot_nb_desc, rq->rx_free_thresh);
1253                 if (rc) {
1254                         dev_err(enic,
1255                                 "Fatal MTU alloc error- No traffic will pass\n");
1256                         goto set_mtu_done;
1257                 }
1258
1259                 rc = enic_reinit_rq(enic, rq_idx);
1260                 if (rc) {
1261                         dev_err(enic,
1262                                 "Fatal MTU RQ reinit- No traffic will pass\n");
1263                         goto set_mtu_done;
1264                 }
1265         }
1266
1267         /* put back the real receive function */
1268         rte_mb();
1269         eth_dev->rx_pkt_burst = enic_recv_pkts;
1270         rte_mb();
1271
1272         /* restart Rx traffic */
1273         for (rq_idx = 0; rq_idx < enic->rq_count; rq_idx++) {
1274                 rq = &enic->rq[enic_rte_rq_idx_to_sop_idx(rq_idx)];
1275                 if (rq->is_sop && rq->in_use)
1276                         enic_start_rq(enic, rq_idx);
1277         }
1278
1279 set_mtu_done:
1280         dev_info(enic, "MTU changed from %u to %u\n",  old_mtu, new_mtu);
1281         rte_spinlock_unlock(&enic->mtu_lock);
1282         return rc;
1283 }
1284
1285 static int enic_dev_init(struct enic *enic)
1286 {
1287         int err;
1288         struct rte_eth_dev *eth_dev = enic->rte_dev;
1289
1290         vnic_dev_intr_coal_timer_info_default(enic->vdev);
1291
1292         /* Get vNIC configuration
1293         */
1294         err = enic_get_vnic_config(enic);
1295         if (err) {
1296                 dev_err(dev, "Get vNIC configuration failed, aborting\n");
1297                 return err;
1298         }
1299
1300         /* Get available resource counts */
1301         enic_get_res_counts(enic);
1302         if (enic->conf_rq_count == 1) {
1303                 dev_err(enic, "Running with only 1 RQ configured in the vNIC is not supported.\n");
1304                 dev_err(enic, "Please configure 2 RQs in the vNIC for each Rx queue used by DPDK.\n");
1305                 dev_err(enic, "See the ENIC PMD guide for more information.\n");
1306                 return -EINVAL;
1307         }
1308
1309         /* Get the supported filters */
1310         enic_fdir_info(enic);
1311
1312         eth_dev->data->mac_addrs = rte_zmalloc("enic_mac_addr", ETH_ALEN
1313                                                 * ENIC_MAX_MAC_ADDR, 0);
1314         if (!eth_dev->data->mac_addrs) {
1315                 dev_err(enic, "mac addr storage alloc failed, aborting.\n");
1316                 return -1;
1317         }
1318         ether_addr_copy((struct ether_addr *) enic->mac_addr,
1319                         eth_dev->data->mac_addrs);
1320
1321         vnic_dev_set_reset_flag(enic->vdev, 0);
1322
1323         LIST_INIT(&enic->flows);
1324         rte_spinlock_init(&enic->flows_lock);
1325
1326         /* set up link status checking */
1327         vnic_dev_notify_set(enic->vdev, -1); /* No Intr for notify */
1328
1329         return 0;
1330
1331 }
1332
1333 int enic_probe(struct enic *enic)
1334 {
1335         struct rte_pci_device *pdev = enic->pdev;
1336         int err = -1;
1337
1338         dev_debug(enic, " Initializing ENIC PMD\n");
1339
1340         /* if this is a secondary process the hardware is already initialized */
1341         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
1342                 return 0;
1343
1344         enic->bar0.vaddr = (void *)pdev->mem_resource[0].addr;
1345         enic->bar0.len = pdev->mem_resource[0].len;
1346
1347         /* Register vNIC device */
1348         enic->vdev = vnic_dev_register(NULL, enic, enic->pdev, &enic->bar0, 1);
1349         if (!enic->vdev) {
1350                 dev_err(enic, "vNIC registration failed, aborting\n");
1351                 goto err_out;
1352         }
1353
1354         LIST_INIT(&enic->memzone_list);
1355         rte_spinlock_init(&enic->memzone_list_lock);
1356
1357         vnic_register_cbacks(enic->vdev,
1358                 enic_alloc_consistent,
1359                 enic_free_consistent);
1360
1361         /* Issue device open to get device in known state */
1362         err = enic_dev_open(enic);
1363         if (err) {
1364                 dev_err(enic, "vNIC dev open failed, aborting\n");
1365                 goto err_out_unregister;
1366         }
1367
1368         /* Set ingress vlan rewrite mode before vnic initialization */
1369         err = vnic_dev_set_ig_vlan_rewrite_mode(enic->vdev,
1370                 IG_VLAN_REWRITE_MODE_PASS_THRU);
1371         if (err) {
1372                 dev_err(enic,
1373                         "Failed to set ingress vlan rewrite mode, aborting.\n");
1374                 goto err_out_dev_close;
1375         }
1376
1377         /* Issue device init to initialize the vnic-to-switch link.
1378          * We'll start with carrier off and wait for link UP
1379          * notification later to turn on carrier.  We don't need
1380          * to wait here for the vnic-to-switch link initialization
1381          * to complete; link UP notification is the indication that
1382          * the process is complete.
1383          */
1384
1385         err = vnic_dev_init(enic->vdev, 0);
1386         if (err) {
1387                 dev_err(enic, "vNIC dev init failed, aborting\n");
1388                 goto err_out_dev_close;
1389         }
1390
1391         err = enic_dev_init(enic);
1392         if (err) {
1393                 dev_err(enic, "Device initialization failed, aborting\n");
1394                 goto err_out_dev_close;
1395         }
1396
1397         return 0;
1398
1399 err_out_dev_close:
1400         vnic_dev_close(enic->vdev);
1401 err_out_unregister:
1402         vnic_dev_unregister(enic->vdev);
1403 err_out:
1404         return err;
1405 }
1406
1407 void enic_remove(struct enic *enic)
1408 {
1409         enic_dev_deinit(enic);
1410         vnic_dev_close(enic->vdev);
1411         vnic_dev_unregister(enic->vdev);
1412 }