drivers/net/enic/enic_main.c

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