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_bus_pci.h>
  44 #include <rte_memzone.h>
  45 #include <rte_malloc.h>
  46 #include <rte_mbuf.h>
  47 #include <rte_string_fns.h>
  48 #include <rte_ethdev.h>
  49
  50 #include "enic_compat.h"
  51 #include "enic.h"
  52 #include "wq_enet_desc.h"
  53 #include "rq_enet_desc.h"
  54 #include "cq_enet_desc.h"
  55 #include "vnic_enet.h"
  56 #include "vnic_dev.h"
  57 #include "vnic_wq.h"
  58 #include "vnic_rq.h"
  59 #include "vnic_cq.h"
  60 #include "vnic_intr.h"
  61 #include "vnic_nic.h"
  62
  63 static inline int enic_is_sriov_vf(struct enic *enic)
  64 {
  65         return enic->pdev->id.device_id == PCI_DEVICE_ID_CISCO_VIC_ENET_VF;
  66 }
  67
  68 static int is_zero_addr(uint8_t *addr)
  69 {
  70         return !(addr[0] |  addr[1] | addr[2] | addr[3] | addr[4] | addr[5]);
  71 }
  72
  73 static int is_mcast_addr(uint8_t *addr)
  74 {
  75         return addr[0] & 1;
  76 }
  77
  78 static int is_eth_addr_valid(uint8_t *addr)
  79 {
  80         return !is_mcast_addr(addr) && !is_zero_addr(addr);
  81 }
  82
  83 static void
  84 enic_rxmbuf_queue_release(__rte_unused struct enic *enic, struct vnic_rq *rq)
  85 {
  86         uint16_t i;
  87
  88         if (!rq || !rq->mbuf_ring) {
  89                 dev_debug(enic, "Pointer to rq or mbuf_ring is NULL");
  90                 return;
  91         }
  92
  93         for (i = 0; i < rq->ring.desc_count; i++) {
  94                 if (rq->mbuf_ring[i]) {
  95                         rte_pktmbuf_free_seg(rq->mbuf_ring[i]);
  96                         rq->mbuf_ring[i] = NULL;
  97                 }
  98         }
  99 }
 100
 101 void enic_set_hdr_split_size(struct enic *enic, u16 split_hdr_size)
 102 {
 103         vnic_set_hdr_split_size(enic->vdev, split_hdr_size);
 104 }
 105
 106 static void enic_free_wq_buf(struct vnic_wq_buf *buf)
 107 {
 108         struct rte_mbuf *mbuf = (struct rte_mbuf *)buf->mb;
 109
 110         rte_pktmbuf_free_seg(mbuf);
 111         buf->mb = NULL;
 112 }
 113
 114 static void enic_log_q_error(struct enic *enic)
 115 {
 116         unsigned int i;
 117         u32 error_status;
 118
 119         for (i = 0; i < enic->wq_count; i++) {
 120                 error_status = vnic_wq_error_status(&enic->wq[i]);
 121                 if (error_status)
 122                         dev_err(enic, "WQ[%d] error_status %d\n", i,
 123                                 error_status);
 124         }
 125
 126         for (i = 0; i < enic_vnic_rq_count(enic); i++) {
 127                 if (!enic->rq[i].in_use)
 128                         continue;
 129                 error_status = vnic_rq_error_status(&enic->rq[i]);
 130                 if (error_status)
 131                         dev_err(enic, "RQ[%d] error_status %d\n", i,
 132                                 error_status);
 133         }
 134 }
 135
 136 static void enic_clear_soft_stats(struct enic *enic)
 137 {
 138         struct enic_soft_stats *soft_stats = &enic->soft_stats;
 139         rte_atomic64_clear(&soft_stats->rx_nombuf);
 140         rte_atomic64_clear(&soft_stats->rx_packet_errors);
 141         rte_atomic64_clear(&soft_stats->tx_oversized);
 142 }
 143
 144 static void enic_init_soft_stats(struct enic *enic)
 145 {
 146         struct enic_soft_stats *soft_stats = &enic->soft_stats;
 147         rte_atomic64_init(&soft_stats->rx_nombuf);
 148         rte_atomic64_init(&soft_stats->rx_packet_errors);
 149         rte_atomic64_init(&soft_stats->tx_oversized);
 150         enic_clear_soft_stats(enic);
 151 }
 152
 153 void enic_dev_stats_clear(struct enic *enic)
 154 {
 155         if (vnic_dev_stats_clear(enic->vdev))
 156                 dev_err(enic, "Error in clearing stats\n");
 157         enic_clear_soft_stats(enic);
 158 }
 159
 160 int enic_dev_stats_get(struct enic *enic, struct rte_eth_stats *r_stats)
 161 {
 162         struct vnic_stats *stats;
 163         struct enic_soft_stats *soft_stats = &enic->soft_stats;
 164         int64_t rx_truncated;
 165         uint64_t rx_packet_errors;
 166         int ret = vnic_dev_stats_dump(enic->vdev, &stats);
 167
 168         if (ret) {
 169                 dev_err(enic, "Error in getting stats\n");
 170                 return ret;
 171         }
 172
 173         /* The number of truncated packets can only be calculated by
 174          * subtracting a hardware counter from error packets received by
 175          * the driver. Note: this causes transient inaccuracies in the
 176          * ipackets count. Also, the length of truncated packets are
 177          * counted in ibytes even though truncated packets are dropped
 178          * which can make ibytes be slightly higher than it should be.
 179          */
 180         rx_packet_errors = rte_atomic64_read(&soft_stats->rx_packet_errors);
 181         rx_truncated = rx_packet_errors - stats->rx.rx_errors;
 182
 183         r_stats->ipackets = stats->rx.rx_frames_ok - rx_truncated;
 184         r_stats->opackets = stats->tx.tx_frames_ok;
 185
 186         r_stats->ibytes = stats->rx.rx_bytes_ok;
 187         r_stats->obytes = stats->tx.tx_bytes_ok;
 188
 189         r_stats->ierrors = stats->rx.rx_errors + stats->rx.rx_drop;
 190         r_stats->oerrors = stats->tx.tx_errors
 191                            + rte_atomic64_read(&soft_stats->tx_oversized);
 192
 193         r_stats->imissed = stats->rx.rx_no_bufs + rx_truncated;
 194
 195         r_stats->rx_nombuf = rte_atomic64_read(&soft_stats->rx_nombuf);
 196         return 0;
 197 }
 198
 199 void enic_del_mac_address(struct enic *enic, int mac_index)
 200 {
 201         struct rte_eth_dev *eth_dev = enic->rte_dev;
 202         uint8_t *mac_addr = eth_dev->data->mac_addrs[mac_index].addr_bytes;
 203
 204         if (vnic_dev_del_addr(enic->vdev, mac_addr))
 205                 dev_err(enic, "del mac addr failed\n");
 206 }
 207
 208 int enic_set_mac_address(struct enic *enic, uint8_t *mac_addr)
 209 {
 210         int err;
 211
 212         if (!is_eth_addr_valid(mac_addr)) {
 213                 dev_err(enic, "invalid mac address\n");
 214                 return -EINVAL;
 215         }
 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 err;
 221 }
 222
 223 static void
 224 enic_free_rq_buf(struct rte_mbuf **mbuf)
 225 {
 226         if (*mbuf == NULL)
 227                 return;
 228
 229         rte_pktmbuf_free(*mbuf);
 230         *mbuf = NULL;
 231 }
 232
 233 void enic_init_vnic_resources(struct enic *enic)
 234 {
 235         unsigned int error_interrupt_enable = 1;
 236         unsigned int error_interrupt_offset = 0;
 237         unsigned int index = 0;
 238         unsigned int cq_idx;
 239         struct vnic_rq *data_rq;
 240
 241         for (index = 0; index < enic->rq_count; index++) {
 242                 cq_idx = enic_cq_rq(enic, enic_rte_rq_idx_to_sop_idx(index));
 243
 244                 vnic_rq_init(&enic->rq[enic_rte_rq_idx_to_sop_idx(index)],
 245                         cq_idx,
 246                         error_interrupt_enable,
 247                         error_interrupt_offset);
 248
 249                 data_rq = &enic->rq[enic_rte_rq_idx_to_data_idx(index)];
 250                 if (data_rq->in_use)
 251                         vnic_rq_init(data_rq,
 252                                      cq_idx,
 253                                      error_interrupt_enable,
 254                                      error_interrupt_offset);
 255
 256                 vnic_cq_init(&enic->cq[cq_idx],
 257                         0 /* flow_control_enable */,
 258                         1 /* color_enable */,
 259                         0 /* cq_head */,
 260                         0 /* cq_tail */,
 261                         1 /* cq_tail_color */,
 262                         0 /* interrupt_enable */,
 263                         1 /* cq_entry_enable */,
 264                         0 /* cq_message_enable */,
 265                         0 /* interrupt offset */,
 266                         0 /* cq_message_addr */);
 267         }
 268
 269         for (index = 0; index < enic->wq_count; index++) {
 270                 vnic_wq_init(&enic->wq[index],
 271                         enic_cq_wq(enic, index),
 272                         error_interrupt_enable,
 273                         error_interrupt_offset);
 274
 275                 cq_idx = enic_cq_wq(enic, index);
 276                 vnic_cq_init(&enic->cq[cq_idx],
 277                         0 /* flow_control_enable */,
 278                         1 /* color_enable */,
 279                         0 /* cq_head */,
 280                         0 /* cq_tail */,
 281                         1 /* cq_tail_color */,
 282                         0 /* interrupt_enable */,
 283                         0 /* cq_entry_enable */,
 284                         1 /* cq_message_enable */,
 285                         0 /* interrupt offset */,
 286                         (u64)enic->wq[index].cqmsg_rz->iova);
 287         }
 288
 289         vnic_intr_init(&enic->intr,
 290                 enic->config.intr_timer_usec,
 291                 enic->config.intr_timer_type,
 292                 /*mask_on_assertion*/1);
 293 }
 294
 295
 296 static int
 297 enic_alloc_rx_queue_mbufs(struct enic *enic, struct vnic_rq *rq)
 298 {
 299         struct rte_mbuf *mb;
 300         struct rq_enet_desc *rqd = rq->ring.descs;
 301         unsigned i;
 302         dma_addr_t dma_addr;
 303
 304         if (!rq->in_use)
 305                 return 0;
 306
 307         dev_debug(enic, "queue %u, allocating %u rx queue mbufs\n", rq->index,
 308                   rq->ring.desc_count);
 309
 310         for (i = 0; i < rq->ring.desc_count; i++, rqd++) {
 311                 mb = rte_mbuf_raw_alloc(rq->mp);
 312                 if (mb == NULL) {
 313                         dev_err(enic, "RX mbuf alloc failed queue_id=%u\n",
 314                         (unsigned)rq->index);
 315                         return -ENOMEM;
 316                 }
 317
 318                 mb->data_off = RTE_PKTMBUF_HEADROOM;
 319                 dma_addr = (dma_addr_t)(mb->buf_iova
 320                            + RTE_PKTMBUF_HEADROOM);
 321                 rq_enet_desc_enc(rqd, dma_addr,
 322                                 (rq->is_sop ? RQ_ENET_TYPE_ONLY_SOP
 323                                 : RQ_ENET_TYPE_NOT_SOP),
 324                                 mb->buf_len - RTE_PKTMBUF_HEADROOM);
 325                 rq->mbuf_ring[i] = mb;
 326         }
 327
 328         /* make sure all prior writes are complete before doing the PIO write */
 329         rte_rmb();
 330
 331         /* Post all but the last buffer to VIC. */
 332         rq->posted_index = rq->ring.desc_count - 1;
 333
 334         rq->rx_nb_hold = 0;
 335
 336         dev_debug(enic, "port=%u, qidx=%u, Write %u posted idx, %u sw held\n",
 337                 enic->port_id, rq->index, rq->posted_index, rq->rx_nb_hold);
 338         iowrite32(rq->posted_index, &rq->ctrl->posted_index);
 339         iowrite32(0, &rq->ctrl->fetch_index);
 340         rte_rmb();
 341
 342         return 0;
 343
 344 }
 345
 346 static void *
 347 enic_alloc_consistent(void *priv, size_t size,
 348         dma_addr_t *dma_handle, u8 *name)
 349 {
 350         void *vaddr;
 351         const struct rte_memzone *rz;
 352         *dma_handle = 0;
 353         struct enic *enic = (struct enic *)priv;
 354         struct enic_memzone_entry *mze;
 355
 356         rz = rte_memzone_reserve_aligned((const char *)name,
 357                                          size, SOCKET_ID_ANY, 0, ENIC_ALIGN);
 358         if (!rz) {
 359                 pr_err("%s : Failed to allocate memory requested for %s\n",
 360                         __func__, name);
 361                 return NULL;
 362         }
 363
 364         vaddr = rz->addr;
 365         *dma_handle = (dma_addr_t)rz->iova;
 366
 367         mze = rte_malloc("enic memzone entry",
 368                          sizeof(struct enic_memzone_entry), 0);
 369
 370         if (!mze) {
 371                 pr_err("%s : Failed to allocate memory for memzone list\n",
 372                        __func__);
 373                 rte_memzone_free(rz);
 374                 return NULL;
 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->iova == 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(void *arg)
 430 {
 431         struct rte_eth_dev *dev = (struct rte_eth_dev *)arg;
 432         struct enic *enic = pmd_priv(dev);
 433
 434         vnic_intr_return_all_credits(&enic->intr);
 435
 436         enic_link_update(enic);
 437         _rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL, NULL);
 438         enic_log_q_error(enic);
 439 }
 440
 441 int enic_enable(struct enic *enic)
 442 {
 443         unsigned int index;
 444         int err;
 445         struct rte_eth_dev *eth_dev = enic->rte_dev;
 446
 447         eth_dev->data->dev_link.link_speed = vnic_dev_port_speed(enic->vdev);
 448         eth_dev->data->dev_link.link_duplex = ETH_LINK_FULL_DUPLEX;
 449
 450         /* vnic notification of link status has already been turned on in
 451          * enic_dev_init() which is called during probe time.  Here we are
 452          * just turning on interrupt vector 0 if needed.
 453          */
 454         if (eth_dev->data->dev_conf.intr_conf.lsc)
 455                 vnic_dev_notify_set(enic->vdev, 0);
 456
 457         if (enic_clsf_init(enic))
 458                 dev_warning(enic, "Init of hash table for clsf failed."\
 459                         "Flow director feature will not work\n");
 460
 461         for (index = 0; index < enic->rq_count; index++) {
 462                 err = enic_alloc_rx_queue_mbufs(enic,
 463                         &enic->rq[enic_rte_rq_idx_to_sop_idx(index)]);
 464                 if (err) {
 465                         dev_err(enic, "Failed to alloc sop RX queue mbufs\n");
 466                         return err;
 467                 }
 468                 err = enic_alloc_rx_queue_mbufs(enic,
 469                         &enic->rq[enic_rte_rq_idx_to_data_idx(index)]);
 470                 if (err) {
 471                         /* release the allocated mbufs for the sop rq*/
 472                         enic_rxmbuf_queue_release(enic,
 473                                 &enic->rq[enic_rte_rq_idx_to_sop_idx(index)]);
 474
 475                         dev_err(enic, "Failed to alloc data RX queue mbufs\n");
 476                         return err;
 477                 }
 478         }
 479
 480         for (index = 0; index < enic->wq_count; index++)
 481                 enic_start_wq(enic, index);
 482         for (index = 0; index < enic->rq_count; index++)
 483                 enic_start_rq(enic, index);
 484
 485         vnic_dev_add_addr(enic->vdev, enic->mac_addr);
 486
 487         vnic_dev_enable_wait(enic->vdev);
 488
 489         /* Register and enable error interrupt */
 490         rte_intr_callback_register(&(enic->pdev->intr_handle),
 491                 enic_intr_handler, (void *)enic->rte_dev);
 492
 493         rte_intr_enable(&(enic->pdev->intr_handle));
 494         vnic_intr_unmask(&enic->intr);
 495
 496         return 0;
 497 }
 498
 499 int enic_alloc_intr_resources(struct enic *enic)
 500 {
 501         int err;
 502
 503         dev_info(enic, "vNIC resources used:  "\
 504                 "wq %d rq %d cq %d intr %d\n",
 505                 enic->wq_count, enic_vnic_rq_count(enic),
 506                 enic->cq_count, enic->intr_count);
 507
 508         err = vnic_intr_alloc(enic->vdev, &enic->intr, 0);
 509         if (err)
 510                 enic_free_vnic_resources(enic);
 511
 512         return err;
 513 }
 514
 515 void enic_free_rq(void *rxq)
 516 {
 517         struct vnic_rq *rq_sop, *rq_data;
 518         struct enic *enic;
 519
 520         if (rxq == NULL)
 521                 return;
 522
 523         rq_sop = (struct vnic_rq *)rxq;
 524         enic = vnic_dev_priv(rq_sop->vdev);
 525         rq_data = &enic->rq[rq_sop->data_queue_idx];
 526
 527         enic_rxmbuf_queue_release(enic, rq_sop);
 528         if (rq_data->in_use)
 529                 enic_rxmbuf_queue_release(enic, rq_data);
 530
 531         rte_free(rq_sop->mbuf_ring);
 532         if (rq_data->in_use)
 533                 rte_free(rq_data->mbuf_ring);
 534
 535         rq_sop->mbuf_ring = NULL;
 536         rq_data->mbuf_ring = NULL;
 537
 538         vnic_rq_free(rq_sop);
 539         if (rq_data->in_use)
 540                 vnic_rq_free(rq_data);
 541
 542         vnic_cq_free(&enic->cq[enic_sop_rq_idx_to_cq_idx(rq_sop->index)]);
 543
 544         rq_sop->in_use = 0;
 545         rq_data->in_use = 0;
 546 }
 547
 548 void enic_start_wq(struct enic *enic, uint16_t queue_idx)
 549 {
 550         struct rte_eth_dev *eth_dev = enic->rte_dev;
 551         vnic_wq_enable(&enic->wq[queue_idx]);
 552         eth_dev->data->tx_queue_state[queue_idx] = RTE_ETH_QUEUE_STATE_STARTED;
 553 }
 554
 555 int enic_stop_wq(struct enic *enic, uint16_t queue_idx)
 556 {
 557         struct rte_eth_dev *eth_dev = enic->rte_dev;
 558         int ret;
 559
 560         ret = vnic_wq_disable(&enic->wq[queue_idx]);
 561         if (ret)
 562                 return ret;
 563
 564         eth_dev->data->tx_queue_state[queue_idx] = RTE_ETH_QUEUE_STATE_STOPPED;
 565         return 0;
 566 }
 567
 568 void enic_start_rq(struct enic *enic, uint16_t queue_idx)
 569 {
 570         struct vnic_rq *rq_sop;
 571         struct vnic_rq *rq_data;
 572         rq_sop = &enic->rq[enic_rte_rq_idx_to_sop_idx(queue_idx)];
 573         rq_data = &enic->rq[rq_sop->data_queue_idx];
 574         struct rte_eth_dev *eth_dev = enic->rte_dev;
 575
 576         if (rq_data->in_use)
 577                 vnic_rq_enable(rq_data);
 578         rte_mb();
 579         vnic_rq_enable(rq_sop);
 580         eth_dev->data->rx_queue_state[queue_idx] = RTE_ETH_QUEUE_STATE_STARTED;
 581 }
 582
 583 int enic_stop_rq(struct enic *enic, uint16_t queue_idx)
 584 {
 585         int ret1 = 0, ret2 = 0;
 586         struct rte_eth_dev *eth_dev = enic->rte_dev;
 587         struct vnic_rq *rq_sop;
 588         struct vnic_rq *rq_data;
 589         rq_sop = &enic->rq[enic_rte_rq_idx_to_sop_idx(queue_idx)];
 590         rq_data = &enic->rq[rq_sop->data_queue_idx];
 591
 592         ret2 = vnic_rq_disable(rq_sop);
 593         rte_mb();
 594         if (rq_data->in_use)
 595                 ret1 = vnic_rq_disable(rq_data);
 596
 597         if (ret2)
 598                 return ret2;
 599         else if (ret1)
 600                 return ret1;
 601
 602         eth_dev->data->rx_queue_state[queue_idx] = RTE_ETH_QUEUE_STATE_STOPPED;
 603         return 0;
 604 }
 605
 606 int enic_alloc_rq(struct enic *enic, uint16_t queue_idx,
 607         unsigned int socket_id, struct rte_mempool *mp,
 608         uint16_t nb_desc, uint16_t free_thresh)
 609 {
 610         int rc;
 611         uint16_t sop_queue_idx = enic_rte_rq_idx_to_sop_idx(queue_idx);
 612         uint16_t data_queue_idx = enic_rte_rq_idx_to_data_idx(queue_idx);
 613         struct vnic_rq *rq_sop = &enic->rq[sop_queue_idx];
 614         struct vnic_rq *rq_data = &enic->rq[data_queue_idx];
 615         unsigned int mbuf_size, mbufs_per_pkt;
 616         unsigned int nb_sop_desc, nb_data_desc;
 617         uint16_t min_sop, max_sop, min_data, max_data;
 618         uint16_t mtu = enic->rte_dev->data->mtu;
 619
 620         rq_sop->is_sop = 1;
 621         rq_sop->data_queue_idx = data_queue_idx;
 622         rq_data->is_sop = 0;
 623         rq_data->data_queue_idx = 0;
 624         rq_sop->socket_id = socket_id;
 625         rq_sop->mp = mp;
 626         rq_data->socket_id = socket_id;
 627         rq_data->mp = mp;
 628         rq_sop->in_use = 1;
 629         rq_sop->rx_free_thresh = free_thresh;
 630         rq_data->rx_free_thresh = free_thresh;
 631         dev_debug(enic, "Set queue_id:%u free thresh:%u\n", queue_idx,
 632                   free_thresh);
 633
 634         mbuf_size = (uint16_t)(rte_pktmbuf_data_room_size(mp) -
 635                                RTE_PKTMBUF_HEADROOM);
 636
 637         if (enic->rte_dev->data->dev_conf.rxmode.enable_scatter) {
 638                 dev_info(enic, "Rq %u Scatter rx mode enabled\n", queue_idx);
 639                 /* ceil((mtu + ETHER_HDR_LEN + 4)/mbuf_size) */
 640                 mbufs_per_pkt = ((mtu + ETHER_HDR_LEN + 4) +
 641                                  (mbuf_size - 1)) / mbuf_size;
 642         } else {
 643                 dev_info(enic, "Scatter rx mode disabled\n");
 644                 mbufs_per_pkt = 1;
 645         }
 646
 647         if (mbufs_per_pkt > 1) {
 648                 dev_info(enic, "Rq %u Scatter rx mode in use\n", queue_idx);
 649                 rq_sop->data_queue_enable = 1;
 650                 rq_data->in_use = 1;
 651         } else {
 652                 dev_info(enic, "Rq %u Scatter rx mode not being used\n",
 653                          queue_idx);
 654                 rq_sop->data_queue_enable = 0;
 655                 rq_data->in_use = 0;
 656         }
 657
 658         /* number of descriptors have to be a multiple of 32 */
 659         nb_sop_desc = (nb_desc / mbufs_per_pkt) & ~0x1F;
 660         nb_data_desc = (nb_desc - nb_sop_desc) & ~0x1F;
 661
 662         rq_sop->max_mbufs_per_pkt = mbufs_per_pkt;
 663         rq_data->max_mbufs_per_pkt = mbufs_per_pkt;
 664
 665         if (mbufs_per_pkt > 1) {
 666                 min_sop = 64;
 667                 max_sop = ((enic->config.rq_desc_count /
 668                             (mbufs_per_pkt - 1)) & ~0x1F);
 669                 min_data = min_sop * (mbufs_per_pkt - 1);
 670                 max_data = enic->config.rq_desc_count;
 671         } else {
 672                 min_sop = 64;
 673                 max_sop = enic->config.rq_desc_count;
 674                 min_data = 0;
 675                 max_data = 0;
 676         }
 677
 678         if (nb_desc < (min_sop + min_data)) {
 679                 dev_warning(enic,
 680                             "Number of rx descs too low, adjusting to minimum\n");
 681                 nb_sop_desc = min_sop;
 682                 nb_data_desc = min_data;
 683         } else if (nb_desc > (max_sop + max_data)) {
 684                 dev_warning(enic,
 685                             "Number of rx_descs too high, adjusting to maximum\n");
 686                 nb_sop_desc = max_sop;
 687                 nb_data_desc = max_data;
 688         }
 689         if (mbufs_per_pkt > 1) {
 690                 dev_info(enic, "For mtu %d and mbuf size %d valid rx descriptor range is %d to %d\n",
 691                          mtu, mbuf_size, min_sop + min_data,
 692                          max_sop + max_data);
 693         }
 694         dev_info(enic, "Using %d rx descriptors (sop %d, data %d)\n",
 695                  nb_sop_desc + nb_data_desc, nb_sop_desc, nb_data_desc);
 696
 697         /* Allocate sop queue resources */
 698         rc = vnic_rq_alloc(enic->vdev, rq_sop, sop_queue_idx,
 699                 nb_sop_desc, sizeof(struct rq_enet_desc));
 700         if (rc) {
 701                 dev_err(enic, "error in allocation of sop rq\n");
 702                 goto err_exit;
 703         }
 704         nb_sop_desc = rq_sop->ring.desc_count;
 705
 706         if (rq_data->in_use) {
 707                 /* Allocate data queue resources */
 708                 rc = vnic_rq_alloc(enic->vdev, rq_data, data_queue_idx,
 709                                    nb_data_desc,
 710                                    sizeof(struct rq_enet_desc));
 711                 if (rc) {
 712                         dev_err(enic, "error in allocation of data rq\n");
 713                         goto err_free_rq_sop;
 714                 }
 715                 nb_data_desc = rq_data->ring.desc_count;
 716         }
 717         rc = vnic_cq_alloc(enic->vdev, &enic->cq[queue_idx], queue_idx,
 718                            socket_id, nb_sop_desc + nb_data_desc,
 719                            sizeof(struct cq_enet_rq_desc));
 720         if (rc) {
 721                 dev_err(enic, "error in allocation of cq for rq\n");
 722                 goto err_free_rq_data;
 723         }
 724
 725         /* Allocate the mbuf rings */
 726         rq_sop->mbuf_ring = (struct rte_mbuf **)
 727                 rte_zmalloc_socket("rq->mbuf_ring",
 728                                    sizeof(struct rte_mbuf *) * nb_sop_desc,
 729                                    RTE_CACHE_LINE_SIZE, rq_sop->socket_id);
 730         if (rq_sop->mbuf_ring == NULL)
 731                 goto err_free_cq;
 732
 733         if (rq_data->in_use) {
 734                 rq_data->mbuf_ring = (struct rte_mbuf **)
 735                         rte_zmalloc_socket("rq->mbuf_ring",
 736                                 sizeof(struct rte_mbuf *) * nb_data_desc,
 737                                 RTE_CACHE_LINE_SIZE, rq_sop->socket_id);
 738                 if (rq_data->mbuf_ring == NULL)
 739                         goto err_free_sop_mbuf;
 740         }
 741
 742         rq_sop->tot_nb_desc = nb_desc; /* squirl away for MTU update function */
 743
 744         return 0;
 745
 746 err_free_sop_mbuf:
 747         rte_free(rq_sop->mbuf_ring);
 748 err_free_cq:
 749         /* cleanup on error */
 750         vnic_cq_free(&enic->cq[queue_idx]);
 751 err_free_rq_data:
 752         if (rq_data->in_use)
 753                 vnic_rq_free(rq_data);
 754 err_free_rq_sop:
 755         vnic_rq_free(rq_sop);
 756 err_exit:
 757         return -ENOMEM;
 758 }
 759
 760 void enic_free_wq(void *txq)
 761 {
 762         struct vnic_wq *wq;
 763         struct enic *enic;
 764
 765         if (txq == NULL)
 766                 return;
 767
 768         wq = (struct vnic_wq *)txq;
 769         enic = vnic_dev_priv(wq->vdev);
 770         rte_memzone_free(wq->cqmsg_rz);
 771         vnic_wq_free(wq);
 772         vnic_cq_free(&enic->cq[enic->rq_count + wq->index]);
 773 }
 774
 775 int enic_alloc_wq(struct enic *enic, uint16_t queue_idx,
 776         unsigned int socket_id, uint16_t nb_desc)
 777 {
 778         int err;
 779         struct vnic_wq *wq = &enic->wq[queue_idx];
 780         unsigned int cq_index = enic_cq_wq(enic, queue_idx);
 781         char name[NAME_MAX];
 782         static int instance;
 783
 784         wq->socket_id = socket_id;
 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                 nb_desc = enic->config.wq_desc_count;
 793         } else if (nb_desc != enic->config.wq_desc_count) {
 794                 dev_info(enic,
 795                          "TX Queues - effective number of descs:%d\n",
 796                          nb_desc);
 797         }
 798
 799         /* Allocate queue resources */
 800         err = vnic_wq_alloc(enic->vdev, &enic->wq[queue_idx], queue_idx,
 801                 nb_desc,
 802                 sizeof(struct wq_enet_desc));
 803         if (err) {
 804                 dev_err(enic, "error in allocation of wq\n");
 805                 return err;
 806         }
 807
 808         err = vnic_cq_alloc(enic->vdev, &enic->cq[cq_index], cq_index,
 809                 socket_id, nb_desc,
 810                 sizeof(struct cq_enet_wq_desc));
 811         if (err) {
 812                 vnic_wq_free(wq);
 813                 dev_err(enic, "error in allocation of cq for wq\n");
 814         }
 815
 816         /* setup up CQ message */
 817         snprintf((char *)name, sizeof(name),
 818                  "vnic_cqmsg-%s-%d-%d", enic->bdf_name, queue_idx,
 819                 instance++);
 820
 821         wq->cqmsg_rz = rte_memzone_reserve_aligned((const char *)name,
 822                                                    sizeof(uint32_t),
 823                                                    SOCKET_ID_ANY, 0,
 824                                                    ENIC_ALIGN);
 825         if (!wq->cqmsg_rz)
 826                 return -ENOMEM;
 827
 828         return err;
 829 }
 830
 831 int enic_disable(struct enic *enic)
 832 {
 833         unsigned int i;
 834         int err;
 835
 836         vnic_intr_mask(&enic->intr);
 837         (void)vnic_intr_masked(&enic->intr); /* flush write */
 838         rte_intr_disable(&enic->pdev->intr_handle);
 839         rte_intr_callback_unregister(&enic->pdev->intr_handle,
 840                                      enic_intr_handler,
 841                                      (void *)enic->rte_dev);
 842
 843         vnic_dev_disable(enic->vdev);
 844
 845         enic_clsf_destroy(enic);
 846
 847         if (!enic_is_sriov_vf(enic))
 848                 vnic_dev_del_addr(enic->vdev, enic->mac_addr);
 849
 850         for (i = 0; i < enic->wq_count; i++) {
 851                 err = vnic_wq_disable(&enic->wq[i]);
 852                 if (err)
 853                         return err;
 854         }
 855         for (i = 0; i < enic_vnic_rq_count(enic); i++) {
 856                 if (enic->rq[i].in_use) {
 857                         err = vnic_rq_disable(&enic->rq[i]);
 858                         if (err)
 859                                 return err;
 860                 }
 861         }
 862
 863         /* If we were using interrupts, set the interrupt vector to -1
 864          * to disable interrupts.  We are not disabling link notifcations,
 865          * though, as we want the polling of link status to continue working.
 866          */
 867         if (enic->rte_dev->data->dev_conf.intr_conf.lsc)
 868                 vnic_dev_notify_set(enic->vdev, -1);
 869
 870         vnic_dev_set_reset_flag(enic->vdev, 1);
 871
 872         for (i = 0; i < enic->wq_count; i++)
 873                 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
 874
 875         for (i = 0; i < enic_vnic_rq_count(enic); i++)
 876                 if (enic->rq[i].in_use)
 877                         vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
 878         for (i = 0; i < enic->cq_count; i++)
 879                 vnic_cq_clean(&enic->cq[i]);
 880         vnic_intr_clean(&enic->intr);
 881
 882         return 0;
 883 }
 884
 885 static int enic_dev_wait(struct vnic_dev *vdev,
 886         int (*start)(struct vnic_dev *, int),
 887         int (*finished)(struct vnic_dev *, int *),
 888         int arg)
 889 {
 890         int done;
 891         int err;
 892         int i;
 893
 894         err = start(vdev, arg);
 895         if (err)
 896                 return err;
 897
 898         /* Wait for func to complete...2 seconds max */
 899         for (i = 0; i < 2000; i++) {
 900                 err = finished(vdev, &done);
 901                 if (err)
 902                         return err;
 903                 if (done)
 904                         return 0;
 905                 usleep(1000);
 906         }
 907         return -ETIMEDOUT;
 908 }
 909
 910 static int enic_dev_open(struct enic *enic)
 911 {
 912         int err;
 913
 914         err = enic_dev_wait(enic->vdev, vnic_dev_open,
 915                 vnic_dev_open_done, 0);
 916         if (err)
 917                 dev_err(enic_get_dev(enic),
 918                         "vNIC device open failed, err %d\n", err);
 919
 920         return err;
 921 }
 922
 923 static int enic_set_rsskey(struct enic *enic)
 924 {
 925         dma_addr_t rss_key_buf_pa;
 926         union vnic_rss_key *rss_key_buf_va = NULL;
 927         static union vnic_rss_key rss_key = {
 928                 .key = {
 929                         [0] = {.b = {85, 67, 83, 97, 119, 101, 115, 111, 109, 101}},
 930                         [1] = {.b = {80, 65, 76, 79, 117, 110, 105, 113, 117, 101}},
 931                         [2] = {.b = {76, 73, 78, 85, 88, 114, 111, 99, 107, 115}},
 932                         [3] = {.b = {69, 78, 73, 67, 105, 115, 99, 111, 111, 108}},
 933                 }
 934         };
 935         int err;
 936         u8 name[NAME_MAX];
 937
 938         snprintf((char *)name, NAME_MAX, "rss_key-%s", enic->bdf_name);
 939         rss_key_buf_va = enic_alloc_consistent(enic, sizeof(union vnic_rss_key),
 940                 &rss_key_buf_pa, name);
 941         if (!rss_key_buf_va)
 942                 return -ENOMEM;
 943
 944         rte_memcpy(rss_key_buf_va, &rss_key, sizeof(union vnic_rss_key));
 945
 946         err = enic_set_rss_key(enic,
 947                 rss_key_buf_pa,
 948                 sizeof(union vnic_rss_key));
 949
 950         enic_free_consistent(enic, sizeof(union vnic_rss_key),
 951                 rss_key_buf_va, rss_key_buf_pa);
 952
 953         return err;
 954 }
 955
 956 static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits)
 957 {
 958         dma_addr_t rss_cpu_buf_pa;
 959         union vnic_rss_cpu *rss_cpu_buf_va = NULL;
 960         int i;
 961         int err;
 962         u8 name[NAME_MAX];
 963
 964         snprintf((char *)name, NAME_MAX, "rss_cpu-%s", enic->bdf_name);
 965         rss_cpu_buf_va = enic_alloc_consistent(enic, sizeof(union vnic_rss_cpu),
 966                 &rss_cpu_buf_pa, name);
 967         if (!rss_cpu_buf_va)
 968                 return -ENOMEM;
 969
 970         for (i = 0; i < (1 << rss_hash_bits); i++)
 971                 (*rss_cpu_buf_va).cpu[i / 4].b[i % 4] =
 972                         enic_rte_rq_idx_to_sop_idx(i % enic->rq_count);
 973
 974         err = enic_set_rss_cpu(enic,
 975                 rss_cpu_buf_pa,
 976                 sizeof(union vnic_rss_cpu));
 977
 978         enic_free_consistent(enic, sizeof(union vnic_rss_cpu),
 979                 rss_cpu_buf_va, rss_cpu_buf_pa);
 980
 981         return err;
 982 }
 983
 984 static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu,
 985         u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable)
 986 {
 987         const u8 tso_ipid_split_en = 0;
 988         int err;
 989
 990         /* Enable VLAN tag stripping */
 991
 992         err = enic_set_nic_cfg(enic,
 993                 rss_default_cpu, rss_hash_type,
 994                 rss_hash_bits, rss_base_cpu,
 995                 rss_enable, tso_ipid_split_en,
 996                 enic->ig_vlan_strip_en);
 997
 998         return err;
 999 }
1000
1001 int enic_set_rss_nic_cfg(struct enic *enic)
1002 {
1003         const u8 rss_default_cpu = 0;
1004         const u8 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 |
1005             NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 |
1006             NIC_CFG_RSS_HASH_TYPE_IPV6 |
1007             NIC_CFG_RSS_HASH_TYPE_TCP_IPV6;
1008         const u8 rss_hash_bits = 7;
1009         const u8 rss_base_cpu = 0;
1010         u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1);
1011
1012         if (rss_enable) {
1013                 if (!enic_set_rsskey(enic)) {
1014                         if (enic_set_rsscpu(enic, rss_hash_bits)) {
1015                                 rss_enable = 0;
1016                                 dev_warning(enic, "RSS disabled, "\
1017                                         "Failed to set RSS cpu indirection table.");
1018                         }
1019                 } else {
1020                         rss_enable = 0;
1021                         dev_warning(enic,
1022                                 "RSS disabled, Failed to set RSS key.\n");
1023                 }
1024         }
1025
1026         return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type,
1027                 rss_hash_bits, rss_base_cpu, rss_enable);
1028 }
1029
1030 int enic_setup_finish(struct enic *enic)
1031 {
1032         int ret;
1033
1034         enic_init_soft_stats(enic);
1035
1036         ret = enic_set_rss_nic_cfg(enic);
1037         if (ret) {
1038                 dev_err(enic, "Failed to config nic, aborting.\n");
1039                 return -1;
1040         }
1041
1042         /* Default conf */
1043         vnic_dev_packet_filter(enic->vdev,
1044                 1 /* directed  */,
1045                 1 /* multicast */,
1046                 1 /* broadcast */,
1047                 0 /* promisc   */,
1048                 1 /* allmulti  */);
1049
1050         enic->promisc = 0;
1051         enic->allmulti = 1;
1052
1053         return 0;
1054 }
1055
1056 void enic_add_packet_filter(struct enic *enic)
1057 {
1058         /* Args -> directed, multicast, broadcast, promisc, allmulti */
1059         vnic_dev_packet_filter(enic->vdev, 1, 1, 1,
1060                 enic->promisc, enic->allmulti);
1061 }
1062
1063 int enic_get_link_status(struct enic *enic)
1064 {
1065         return vnic_dev_link_status(enic->vdev);
1066 }
1067
1068 static void enic_dev_deinit(struct enic *enic)
1069 {
1070         struct rte_eth_dev *eth_dev = enic->rte_dev;
1071
1072         /* stop link status checking */
1073         vnic_dev_notify_unset(enic->vdev);
1074
1075         rte_free(eth_dev->data->mac_addrs);
1076         rte_free(enic->cq);
1077         rte_free(enic->rq);
1078         rte_free(enic->wq);
1079 }
1080
1081
1082 int enic_set_vnic_res(struct enic *enic)
1083 {
1084         struct rte_eth_dev *eth_dev = enic->rte_dev;
1085         int rc = 0;
1086         unsigned int required_rq, required_wq, required_cq;
1087
1088         /* Always use two vNIC RQs per eth_dev RQ, regardless of Rx scatter. */
1089         required_rq = eth_dev->data->nb_rx_queues * 2;
1090         required_wq = eth_dev->data->nb_tx_queues;
1091         required_cq = eth_dev->data->nb_rx_queues + eth_dev->data->nb_tx_queues;
1092
1093         if (enic->conf_rq_count < required_rq) {
1094                 dev_err(dev, "Not enough Receive queues. Requested:%u which uses %d RQs on VIC, Configured:%u\n",
1095                         eth_dev->data->nb_rx_queues,
1096                         required_rq, enic->conf_rq_count);
1097                 rc = -EINVAL;
1098         }
1099         if (enic->conf_wq_count < required_wq) {
1100                 dev_err(dev, "Not enough Transmit queues. Requested:%u, Configured:%u\n",
1101                         eth_dev->data->nb_tx_queues, enic->conf_wq_count);
1102                 rc = -EINVAL;
1103         }
1104
1105         if (enic->conf_cq_count < required_cq) {
1106                 dev_err(dev, "Not enough Completion queues. Required:%u, Configured:%u\n",
1107                         required_cq, enic->conf_cq_count);
1108                 rc = -EINVAL;
1109         }
1110
1111         if (rc == 0) {
1112                 enic->rq_count = eth_dev->data->nb_rx_queues;
1113                 enic->wq_count = eth_dev->data->nb_tx_queues;
1114                 enic->cq_count = enic->rq_count + enic->wq_count;
1115         }
1116
1117         return rc;
1118 }
1119
1120 /* Initialize the completion queue for an RQ */
1121 static int
1122 enic_reinit_rq(struct enic *enic, unsigned int rq_idx)
1123 {
1124         struct vnic_rq *sop_rq, *data_rq;
1125         unsigned int cq_idx;
1126         int rc = 0;
1127
1128         sop_rq = &enic->rq[enic_rte_rq_idx_to_sop_idx(rq_idx)];
1129         data_rq = &enic->rq[enic_rte_rq_idx_to_data_idx(rq_idx)];
1130         cq_idx = rq_idx;
1131
1132         vnic_cq_clean(&enic->cq[cq_idx]);
1133         vnic_cq_init(&enic->cq[cq_idx],
1134                      0 /* flow_control_enable */,
1135                      1 /* color_enable */,
1136                      0 /* cq_head */,
1137                      0 /* cq_tail */,
1138                      1 /* cq_tail_color */,
1139                      0 /* interrupt_enable */,
1140                      1 /* cq_entry_enable */,
1141                      0 /* cq_message_enable */,
1142                      0 /* interrupt offset */,
1143                      0 /* cq_message_addr */);
1144
1145
1146         vnic_rq_init_start(sop_rq, enic_cq_rq(enic,
1147                            enic_rte_rq_idx_to_sop_idx(rq_idx)), 0,
1148                            sop_rq->ring.desc_count - 1, 1, 0);
1149         if (data_rq->in_use) {
1150                 vnic_rq_init_start(data_rq,
1151                                    enic_cq_rq(enic,
1152                                    enic_rte_rq_idx_to_data_idx(rq_idx)), 0,
1153                                    data_rq->ring.desc_count - 1, 1, 0);
1154         }
1155
1156         rc = enic_alloc_rx_queue_mbufs(enic, sop_rq);
1157         if (rc)
1158                 return rc;
1159
1160         if (data_rq->in_use) {
1161                 rc = enic_alloc_rx_queue_mbufs(enic, data_rq);
1162                 if (rc) {
1163                         enic_rxmbuf_queue_release(enic, sop_rq);
1164                         return rc;
1165                 }
1166         }
1167
1168         return 0;
1169 }
1170
1171 /* The Cisco NIC can send and receive packets up to a max packet size
1172  * determined by the NIC type and firmware. There is also an MTU
1173  * configured into the NIC via the CIMC/UCSM management interface
1174  * which can be overridden by this function (up to the max packet size).
1175  * Depending on the network setup, doing so may cause packet drops
1176  * and unexpected behavior.
1177  */
1178 int enic_set_mtu(struct enic *enic, uint16_t new_mtu)
1179 {
1180         unsigned int rq_idx;
1181         struct vnic_rq *rq;
1182         int rc = 0;
1183         uint16_t old_mtu;       /* previous setting */
1184         uint16_t config_mtu;    /* Value configured into NIC via CIMC/UCSM */
1185         struct rte_eth_dev *eth_dev = enic->rte_dev;
1186
1187         old_mtu = eth_dev->data->mtu;
1188         config_mtu = enic->config.mtu;
1189
1190         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
1191                 return -E_RTE_SECONDARY;
1192
1193         if (new_mtu > enic->max_mtu) {
1194                 dev_err(enic,
1195                         "MTU not updated: requested (%u) greater than max (%u)\n",
1196                         new_mtu, enic->max_mtu);
1197                 return -EINVAL;
1198         }
1199         if (new_mtu < ENIC_MIN_MTU) {
1200                 dev_info(enic,
1201                         "MTU not updated: requested (%u) less than min (%u)\n",
1202                         new_mtu, ENIC_MIN_MTU);
1203                 return -EINVAL;
1204         }
1205         if (new_mtu > config_mtu)
1206                 dev_warning(enic,
1207                         "MTU (%u) is greater than value configured in NIC (%u)\n",
1208                         new_mtu, config_mtu);
1209
1210         /* The easy case is when scatter is disabled. However if the MTU
1211          * becomes greater than the mbuf data size, packet drops will ensue.
1212          */
1213         if (!enic->rte_dev->data->dev_conf.rxmode.enable_scatter) {
1214                 eth_dev->data->mtu = new_mtu;
1215                 goto set_mtu_done;
1216         }
1217
1218         /* Rx scatter is enabled so reconfigure RQ's on the fly. The point is to
1219          * change Rx scatter mode if necessary for better performance. I.e. if
1220          * MTU was greater than the mbuf size and now it's less, scatter Rx
1221          * doesn't have to be used and vice versa.
1222           */
1223         rte_spinlock_lock(&enic->mtu_lock);
1224
1225         /* Stop traffic on all RQs */
1226         for (rq_idx = 0; rq_idx < enic->rq_count * 2; rq_idx++) {
1227                 rq = &enic->rq[rq_idx];
1228                 if (rq->is_sop && rq->in_use) {
1229                         rc = enic_stop_rq(enic,
1230                                           enic_sop_rq_idx_to_rte_idx(rq_idx));
1231                         if (rc) {
1232                                 dev_err(enic, "Failed to stop Rq %u\n", rq_idx);
1233                                 goto set_mtu_done;
1234                         }
1235                 }
1236         }
1237
1238         /* replace Rx function with a no-op to avoid getting stale pkts */
1239         eth_dev->rx_pkt_burst = enic_dummy_recv_pkts;
1240         rte_mb();
1241
1242         /* Allow time for threads to exit the real Rx function. */
1243         usleep(100000);
1244
1245         /* now it is safe to reconfigure the RQs */
1246
1247         /* update the mtu */
1248         eth_dev->data->mtu = new_mtu;
1249
1250         /* free and reallocate RQs with the new MTU */
1251         for (rq_idx = 0; rq_idx < enic->rq_count; rq_idx++) {
1252                 rq = &enic->rq[enic_rte_rq_idx_to_sop_idx(rq_idx)];
1253                 if (!rq->in_use)
1254                         continue;
1255
1256                 enic_free_rq(rq);
1257                 rc = enic_alloc_rq(enic, rq_idx, rq->socket_id, rq->mp,
1258                                    rq->tot_nb_desc, rq->rx_free_thresh);
1259                 if (rc) {
1260                         dev_err(enic,
1261                                 "Fatal MTU alloc error- No traffic will pass\n");
1262                         goto set_mtu_done;
1263                 }
1264
1265                 rc = enic_reinit_rq(enic, rq_idx);
1266                 if (rc) {
1267                         dev_err(enic,
1268                                 "Fatal MTU RQ reinit- No traffic will pass\n");
1269                         goto set_mtu_done;
1270                 }
1271         }
1272
1273         /* put back the real receive function */
1274         rte_mb();
1275         eth_dev->rx_pkt_burst = enic_recv_pkts;
1276         rte_mb();
1277
1278         /* restart Rx traffic */
1279         for (rq_idx = 0; rq_idx < enic->rq_count; rq_idx++) {
1280                 rq = &enic->rq[enic_rte_rq_idx_to_sop_idx(rq_idx)];
1281                 if (rq->is_sop && rq->in_use)
1282                         enic_start_rq(enic, rq_idx);
1283         }
1284
1285 set_mtu_done:
1286         dev_info(enic, "MTU changed from %u to %u\n",  old_mtu, new_mtu);
1287         rte_spinlock_unlock(&enic->mtu_lock);
1288         return rc;
1289 }
1290
1291 static int enic_dev_init(struct enic *enic)
1292 {
1293         int err;
1294         struct rte_eth_dev *eth_dev = enic->rte_dev;
1295
1296         vnic_dev_intr_coal_timer_info_default(enic->vdev);
1297
1298         /* Get vNIC configuration
1299         */
1300         err = enic_get_vnic_config(enic);
1301         if (err) {
1302                 dev_err(dev, "Get vNIC configuration failed, aborting\n");
1303                 return err;
1304         }
1305
1306         /* Get available resource counts */
1307         enic_get_res_counts(enic);
1308         if (enic->conf_rq_count == 1) {
1309                 dev_err(enic, "Running with only 1 RQ configured in the vNIC is not supported.\n");
1310                 dev_err(enic, "Please configure 2 RQs in the vNIC for each Rx queue used by DPDK.\n");
1311                 dev_err(enic, "See the ENIC PMD guide for more information.\n");
1312                 return -EINVAL;
1313         }
1314         /* Queue counts may be zeros. rte_zmalloc returns NULL in that case. */
1315         enic->cq = rte_zmalloc("enic_vnic_cq", sizeof(struct vnic_cq) *
1316                                enic->conf_cq_count, 8);
1317         enic->rq = rte_zmalloc("enic_vnic_rq", sizeof(struct vnic_rq) *
1318                                enic->conf_rq_count, 8);
1319         enic->wq = rte_zmalloc("enic_vnic_wq", sizeof(struct vnic_wq) *
1320                                enic->conf_wq_count, 8);
1321         if (enic->conf_cq_count > 0 && enic->cq == NULL) {
1322                 dev_err(enic, "failed to allocate vnic_cq, aborting.\n");
1323                 return -1;
1324         }
1325         if (enic->conf_rq_count > 0 && enic->rq == NULL) {
1326                 dev_err(enic, "failed to allocate vnic_rq, aborting.\n");
1327                 return -1;
1328         }
1329         if (enic->conf_wq_count > 0 && enic->wq == NULL) {
1330                 dev_err(enic, "failed to allocate vnic_wq, aborting.\n");
1331                 return -1;
1332         }
1333
1334         /* Get the supported filters */
1335         enic_fdir_info(enic);
1336
1337         eth_dev->data->mac_addrs = rte_zmalloc("enic_mac_addr", ETH_ALEN
1338                                                 * ENIC_MAX_MAC_ADDR, 0);
1339         if (!eth_dev->data->mac_addrs) {
1340                 dev_err(enic, "mac addr storage alloc failed, aborting.\n");
1341                 return -1;
1342         }
1343         ether_addr_copy((struct ether_addr *) enic->mac_addr,
1344                         eth_dev->data->mac_addrs);
1345
1346         vnic_dev_set_reset_flag(enic->vdev, 0);
1347
1348         LIST_INIT(&enic->flows);
1349         rte_spinlock_init(&enic->flows_lock);
1350
1351         /* set up link status checking */
1352         vnic_dev_notify_set(enic->vdev, -1); /* No Intr for notify */
1353
1354         return 0;
1355
1356 }
1357
1358 int enic_probe(struct enic *enic)
1359 {
1360         struct rte_pci_device *pdev = enic->pdev;
1361         int err = -1;
1362
1363         dev_debug(enic, " Initializing ENIC PMD\n");
1364
1365         /* if this is a secondary process the hardware is already initialized */
1366         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
1367                 return 0;
1368
1369         enic->bar0.vaddr = (void *)pdev->mem_resource[0].addr;
1370         enic->bar0.len = pdev->mem_resource[0].len;
1371
1372         /* Register vNIC device */
1373         enic->vdev = vnic_dev_register(NULL, enic, enic->pdev, &enic->bar0, 1);
1374         if (!enic->vdev) {
1375                 dev_err(enic, "vNIC registration failed, aborting\n");
1376                 goto err_out;
1377         }
1378
1379         LIST_INIT(&enic->memzone_list);
1380         rte_spinlock_init(&enic->memzone_list_lock);
1381
1382         vnic_register_cbacks(enic->vdev,
1383                 enic_alloc_consistent,
1384                 enic_free_consistent);
1385
1386         /*
1387          * Allocate the consistent memory for stats upfront so both primary and
1388          * secondary processes can dump stats.
1389          */
1390         err = vnic_dev_alloc_stats_mem(enic->vdev);
1391         if (err) {
1392                 dev_err(enic, "Failed to allocate cmd memory, aborting\n");
1393                 goto err_out_unregister;
1394         }
1395         /* Issue device open to get device in known state */
1396         err = enic_dev_open(enic);
1397         if (err) {
1398                 dev_err(enic, "vNIC dev open failed, aborting\n");
1399                 goto err_out_unregister;
1400         }
1401
1402         /* Set ingress vlan rewrite mode before vnic initialization */
1403         dev_debug(enic, "Set ig_vlan_rewrite_mode=%u\n",
1404                   enic->ig_vlan_rewrite_mode);
1405         err = vnic_dev_set_ig_vlan_rewrite_mode(enic->vdev,
1406                 enic->ig_vlan_rewrite_mode);
1407         if (err) {
1408                 dev_err(enic,
1409                         "Failed to set ingress vlan rewrite mode, aborting.\n");
1410                 goto err_out_dev_close;
1411         }
1412
1413         /* Issue device init to initialize the vnic-to-switch link.
1414          * We'll start with carrier off and wait for link UP
1415          * notification later to turn on carrier.  We don't need
1416          * to wait here for the vnic-to-switch link initialization
1417          * to complete; link UP notification is the indication that
1418          * the process is complete.
1419          */
1420
1421         err = vnic_dev_init(enic->vdev, 0);
1422         if (err) {
1423                 dev_err(enic, "vNIC dev init failed, aborting\n");
1424                 goto err_out_dev_close;
1425         }
1426
1427         err = enic_dev_init(enic);
1428         if (err) {
1429                 dev_err(enic, "Device initialization failed, aborting\n");
1430                 goto err_out_dev_close;
1431         }
1432
1433         return 0;
1434
1435 err_out_dev_close:
1436         vnic_dev_close(enic->vdev);
1437 err_out_unregister:
1438         vnic_dev_unregister(enic->vdev);
1439 err_out:
1440         return err;
1441 }
1442
1443 void enic_remove(struct enic *enic)
1444 {
1445         enic_dev_deinit(enic);
1446         vnic_dev_close(enic->vdev);
1447         vnic_dev_unregister(enic->vdev);
1448 }