drivers/net/enic/enic_main.c

   1 /*
   2  * Copyright 2008-2014 Cisco Systems, Inc.  All rights reserved.
   3  * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
   4  *
   5  * Copyright (c) 2014, Cisco Systems, Inc.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  * notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  * notice, this list of conditions and the following disclaimer in
  17  * the documentation and/or other materials provided with the
  18  * distribution.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  23  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  24  * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  26  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  27  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  28  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  30  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  31  * POSSIBILITY OF SUCH DAMAGE.
  32  *
  33  */
  34
  35 #include <stdio.h>
  36
  37 #include <sys/stat.h>
  38 #include <sys/mman.h>
  39 #include <fcntl.h>
  40 #include <libgen.h>
  41
  42 #include <rte_pci.h>
  43 #include <rte_memzone.h>
  44 #include <rte_malloc.h>
  45 #include <rte_mbuf.h>
  46 #include <rte_string_fns.h>
  47 #include <rte_ethdev.h>
  48
  49 #include "enic_compat.h"
  50 #include "enic.h"
  51 #include "wq_enet_desc.h"
  52 #include "rq_enet_desc.h"
  53 #include "cq_enet_desc.h"
  54 #include "vnic_enet.h"
  55 #include "vnic_dev.h"
  56 #include "vnic_wq.h"
  57 #include "vnic_rq.h"
  58 #include "vnic_cq.h"
  59 #include "vnic_intr.h"
  60 #include "vnic_nic.h"
  61
  62 static inline int enic_is_sriov_vf(struct enic *enic)
  63 {
  64         return enic->pdev->id.device_id == PCI_DEVICE_ID_CISCO_VIC_ENET_VF;
  65 }
  66
  67 static int is_zero_addr(uint8_t *addr)
  68 {
  69         return !(addr[0] |  addr[1] | addr[2] | addr[3] | addr[4] | addr[5]);
  70 }
  71
  72 static int is_mcast_addr(uint8_t *addr)
  73 {
  74         return addr[0] & 1;
  75 }
  76
  77 static int is_eth_addr_valid(uint8_t *addr)
  78 {
  79         return !is_mcast_addr(addr) && !is_zero_addr(addr);
  80 }
  81
  82 static void
  83 enic_rxmbuf_queue_release(__rte_unused struct enic *enic, struct vnic_rq *rq)
  84 {
  85         uint16_t i;
  86
  87         if (!rq || !rq->mbuf_ring) {
  88                 dev_debug(enic, "Pointer to rq or mbuf_ring is NULL");
  89                 return;
  90         }
  91
  92         for (i = 0; i < rq->ring.desc_count; i++) {
  93                 if (rq->mbuf_ring[i]) {
  94                         rte_pktmbuf_free_seg(rq->mbuf_ring[i]);
  95                         rq->mbuf_ring[i] = NULL;
  96                 }
  97         }
  98 }
  99
 100 void enic_set_hdr_split_size(struct enic *enic, u16 split_hdr_size)
 101 {
 102         vnic_set_hdr_split_size(enic->vdev, split_hdr_size);
 103 }
 104
 105 static void enic_free_wq_buf(struct vnic_wq_buf *buf)
 106 {
 107         struct rte_mbuf *mbuf = (struct rte_mbuf *)buf->mb;
 108
 109         rte_pktmbuf_free_seg(mbuf);
 110         buf->mb = NULL;
 111 }
 112
 113 static void enic_log_q_error(struct enic *enic)
 114 {
 115         unsigned int i;
 116         u32 error_status;
 117
 118         for (i = 0; i < enic->wq_count; i++) {
 119                 error_status = vnic_wq_error_status(&enic->wq[i]);
 120                 if (error_status)
 121                         dev_err(enic, "WQ[%d] error_status %d\n", i,
 122                                 error_status);
 123         }
 124
 125         for (i = 0; i < enic_vnic_rq_count(enic); i++) {
 126                 if (!enic->rq[i].in_use)
 127                         continue;
 128                 error_status = vnic_rq_error_status(&enic->rq[i]);
 129                 if (error_status)
 130                         dev_err(enic, "RQ[%d] error_status %d\n", i,
 131                                 error_status);
 132         }
 133 }
 134
 135 static void enic_clear_soft_stats(struct enic *enic)
 136 {
 137         struct enic_soft_stats *soft_stats = &enic->soft_stats;
 138         rte_atomic64_clear(&soft_stats->rx_nombuf);
 139         rte_atomic64_clear(&soft_stats->rx_packet_errors);
 140         rte_atomic64_clear(&soft_stats->tx_oversized);
 141 }
 142
 143 static void enic_init_soft_stats(struct enic *enic)
 144 {
 145         struct enic_soft_stats *soft_stats = &enic->soft_stats;
 146         rte_atomic64_init(&soft_stats->rx_nombuf);
 147         rte_atomic64_init(&soft_stats->rx_packet_errors);
 148         rte_atomic64_init(&soft_stats->tx_oversized);
 149         enic_clear_soft_stats(enic);
 150 }
 151
 152 void enic_dev_stats_clear(struct enic *enic)
 153 {
 154         if (vnic_dev_stats_clear(enic->vdev))
 155                 dev_err(enic, "Error in clearing stats\n");
 156         enic_clear_soft_stats(enic);
 157 }
 158
 159 void enic_dev_stats_get(struct enic *enic, struct rte_eth_stats *r_stats)
 160 {
 161         struct vnic_stats *stats;
 162         struct enic_soft_stats *soft_stats = &enic->soft_stats;
 163         int64_t rx_truncated;
 164         uint64_t rx_packet_errors;
 165
 166         if (vnic_dev_stats_dump(enic->vdev, &stats)) {
 167                 dev_err(enic, "Error in getting stats\n");
 168                 return;
 169         }
 170
 171         /* The number of truncated packets can only be calculated by
 172          * subtracting a hardware counter from error packets received by
 173          * the driver. Note: this causes transient inaccuracies in the
 174          * ipackets count. Also, the length of truncated packets are
 175          * counted in ibytes even though truncated packets are dropped
 176          * which can make ibytes be slightly higher than it should be.
 177          */
 178         rx_packet_errors = rte_atomic64_read(&soft_stats->rx_packet_errors);
 179         rx_truncated = rx_packet_errors - stats->rx.rx_errors;
 180
 181         r_stats->ipackets = stats->rx.rx_frames_ok - rx_truncated;
 182         r_stats->opackets = stats->tx.tx_frames_ok;
 183
 184         r_stats->ibytes = stats->rx.rx_bytes_ok;
 185         r_stats->obytes = stats->tx.tx_bytes_ok;
 186
 187         r_stats->ierrors = stats->rx.rx_errors + stats->rx.rx_drop;
 188         r_stats->oerrors = stats->tx.tx_errors
 189                            + rte_atomic64_read(&soft_stats->tx_oversized);
 190
 191         r_stats->imissed = stats->rx.rx_no_bufs + rx_truncated;
 192
 193         r_stats->rx_nombuf = rte_atomic64_read(&soft_stats->rx_nombuf);
 194 }
 195
 196 void enic_del_mac_address(struct enic *enic)
 197 {
 198         if (vnic_dev_del_addr(enic->vdev, enic->mac_addr))
 199                 dev_err(enic, "del mac addr failed\n");
 200 }
 201
 202 void enic_set_mac_address(struct enic *enic, uint8_t *mac_addr)
 203 {
 204         int err;
 205
 206         if (!is_eth_addr_valid(mac_addr)) {
 207                 dev_err(enic, "invalid mac address\n");
 208                 return;
 209         }
 210
 211         err = vnic_dev_del_addr(enic->vdev, enic->mac_addr);
 212         if (err) {
 213                 dev_err(enic, "del mac addr failed\n");
 214                 return;
 215         }
 216
 217         ether_addr_copy((struct ether_addr *)mac_addr,
 218                 (struct ether_addr *)enic->mac_addr);
 219
 220         err = vnic_dev_add_addr(enic->vdev, mac_addr);
 221         if (err) {
 222                 dev_err(enic, "add mac addr failed\n");
 223                 return;
 224         }
 225 }
 226
 227 static void
 228 enic_free_rq_buf(struct rte_mbuf **mbuf)
 229 {
 230         if (*mbuf == NULL)
 231                 return;
 232
 233         rte_pktmbuf_free(*mbuf);
 234         mbuf = NULL;
 235 }
 236
 237 void enic_init_vnic_resources(struct enic *enic)
 238 {
 239         unsigned int error_interrupt_enable = 1;
 240         unsigned int error_interrupt_offset = 0;
 241         unsigned int index = 0;
 242         unsigned int cq_idx;
 243         struct vnic_rq *data_rq;
 244
 245         for (index = 0; index < enic->rq_count; index++) {
 246                 cq_idx = enic_cq_rq(enic, enic_rte_rq_idx_to_sop_idx(index));
 247
 248                 vnic_rq_init(&enic->rq[enic_rte_rq_idx_to_sop_idx(index)],
 249                         cq_idx,
 250                         error_interrupt_enable,
 251                         error_interrupt_offset);
 252
 253                 data_rq = &enic->rq[enic_rte_rq_idx_to_data_idx(index)];
 254                 if (data_rq->in_use)
 255                         vnic_rq_init(data_rq,
 256                                      cq_idx,
 257                                      error_interrupt_enable,
 258                                      error_interrupt_offset);
 259
 260                 vnic_cq_init(&enic->cq[cq_idx],
 261                         0 /* flow_control_enable */,
 262                         1 /* color_enable */,
 263                         0 /* cq_head */,
 264                         0 /* cq_tail */,
 265                         1 /* cq_tail_color */,
 266                         0 /* interrupt_enable */,
 267                         1 /* cq_entry_enable */,
 268                         0 /* cq_message_enable */,
 269                         0 /* interrupt offset */,
 270                         0 /* cq_message_addr */);
 271         }
 272
 273         for (index = 0; index < enic->wq_count; index++) {
 274                 vnic_wq_init(&enic->wq[index],
 275                         enic_cq_wq(enic, index),
 276                         error_interrupt_enable,
 277                         error_interrupt_offset);
 278
 279                 cq_idx = enic_cq_wq(enic, index);
 280                 vnic_cq_init(&enic->cq[cq_idx],
 281                         0 /* flow_control_enable */,
 282                         1 /* color_enable */,
 283                         0 /* cq_head */,
 284                         0 /* cq_tail */,
 285                         1 /* cq_tail_color */,
 286                         0 /* interrupt_enable */,
 287                         0 /* cq_entry_enable */,
 288                         1 /* cq_message_enable */,
 289                         0 /* interrupt offset */,
 290                         (u64)enic->wq[index].cqmsg_rz->phys_addr);
 291         }
 292
 293         vnic_intr_init(&enic->intr,
 294                 enic->config.intr_timer_usec,
 295                 enic->config.intr_timer_type,
 296                 /*mask_on_assertion*/1);
 297 }
 298
 299
 300 static int
 301 enic_alloc_rx_queue_mbufs(struct enic *enic, struct vnic_rq *rq)
 302 {
 303         struct rte_mbuf *mb;
 304         struct rq_enet_desc *rqd = rq->ring.descs;
 305         unsigned i;
 306         dma_addr_t dma_addr;
 307
 308         if (!rq->in_use)
 309                 return 0;
 310
 311         dev_debug(enic, "queue %u, allocating %u rx queue mbufs\n", rq->index,
 312                   rq->ring.desc_count);
 313
 314         for (i = 0; i < rq->ring.desc_count; i++, rqd++) {
 315                 mb = rte_mbuf_raw_alloc(rq->mp);
 316                 if (mb == NULL) {
 317                         dev_err(enic, "RX mbuf alloc failed queue_id=%u\n",
 318                         (unsigned)rq->index);
 319                         return -ENOMEM;
 320                 }
 321
 322                 mb->data_off = RTE_PKTMBUF_HEADROOM;
 323                 dma_addr = (dma_addr_t)(mb->buf_physaddr
 324                            + RTE_PKTMBUF_HEADROOM);
 325                 rq_enet_desc_enc(rqd, dma_addr,
 326                                 (rq->is_sop ? RQ_ENET_TYPE_ONLY_SOP
 327                                 : RQ_ENET_TYPE_NOT_SOP),
 328                                 mb->buf_len - RTE_PKTMBUF_HEADROOM);
 329                 rq->mbuf_ring[i] = mb;
 330         }
 331
 332         /* make sure all prior writes are complete before doing the PIO write */
 333         rte_rmb();
 334
 335         /* Post all but the last buffer to VIC. */
 336         rq->posted_index = rq->ring.desc_count - 1;
 337
 338         rq->rx_nb_hold = 0;
 339
 340         dev_debug(enic, "port=%u, qidx=%u, Write %u posted idx, %u sw held\n",
 341                 enic->port_id, rq->index, rq->posted_index, rq->rx_nb_hold);
 342         iowrite32(rq->posted_index, &rq->ctrl->posted_index);
 343         iowrite32(0, &rq->ctrl->fetch_index);
 344         rte_rmb();
 345
 346         return 0;
 347
 348 }
 349
 350 static void *
 351 enic_alloc_consistent(void *priv, size_t size,
 352         dma_addr_t *dma_handle, u8 *name)
 353 {
 354         void *vaddr;
 355         const struct rte_memzone *rz;
 356         *dma_handle = 0;
 357         struct enic *enic = (struct enic *)priv;
 358         struct enic_memzone_entry *mze;
 359
 360         rz = rte_memzone_reserve_aligned((const char *)name,
 361                                          size, SOCKET_ID_ANY, 0, ENIC_ALIGN);
 362         if (!rz) {
 363                 pr_err("%s : Failed to allocate memory requested for %s\n",
 364                         __func__, name);
 365                 return NULL;
 366         }
 367
 368         vaddr = rz->addr;
 369         *dma_handle = (dma_addr_t)rz->phys_addr;
 370
 371         mze = rte_malloc("enic memzone entry",
 372                          sizeof(struct enic_memzone_entry), 0);
 373
 374         if (!mze) {
 375                 pr_err("%s : Failed to allocate memory for memzone list\n",
 376                        __func__);
 377                 rte_memzone_free(rz);
 378         }
 379
 380         mze->rz = rz;
 381
 382         rte_spinlock_lock(&enic->memzone_list_lock);
 383         LIST_INSERT_HEAD(&enic->memzone_list, mze, entries);
 384         rte_spinlock_unlock(&enic->memzone_list_lock);
 385
 386         return vaddr;
 387 }
 388
 389 static void
 390 enic_free_consistent(void *priv,
 391                      __rte_unused size_t size,
 392                      void *vaddr,
 393                      dma_addr_t dma_handle)
 394 {
 395         struct enic_memzone_entry *mze;
 396         struct enic *enic = (struct enic *)priv;
 397
 398         rte_spinlock_lock(&enic->memzone_list_lock);
 399         LIST_FOREACH(mze, &enic->memzone_list, entries) {
 400                 if (mze->rz->addr == vaddr &&
 401                     mze->rz->phys_addr == dma_handle)
 402                         break;
 403         }
 404         if (mze == NULL) {
 405                 rte_spinlock_unlock(&enic->memzone_list_lock);
 406                 dev_warning(enic,
 407                             "Tried to free memory, but couldn't find it in the memzone list\n");
 408                 return;
 409         }
 410         LIST_REMOVE(mze, entries);
 411         rte_spinlock_unlock(&enic->memzone_list_lock);
 412         rte_memzone_free(mze->rz);
 413         rte_free(mze);
 414 }
 415
 416 int enic_link_update(struct enic *enic)
 417 {
 418         struct rte_eth_dev *eth_dev = enic->rte_dev;
 419         int ret;
 420         int link_status = 0;
 421
 422         link_status = enic_get_link_status(enic);
 423         ret = (link_status == enic->link_status);
 424         enic->link_status = link_status;
 425         eth_dev->data->dev_link.link_status = link_status;
 426         eth_dev->data->dev_link.link_duplex = ETH_LINK_FULL_DUPLEX;
 427         eth_dev->data->dev_link.link_speed = vnic_dev_port_speed(enic->vdev);
 428         return ret;
 429 }
 430
 431 static void
 432 enic_intr_handler(__rte_unused struct rte_intr_handle *handle,
 433         void *arg)
 434 {
 435         struct rte_eth_dev *dev = (struct rte_eth_dev *)arg;
 436         struct enic *enic = pmd_priv(dev);
 437
 438         vnic_intr_return_all_credits(&enic->intr);
 439
 440         enic_link_update(enic);
 441         _rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL);
 442         enic_log_q_error(enic);
 443 }
 444
 445 int enic_enable(struct enic *enic)
 446 {
 447         unsigned int index;
 448         int err;
 449         struct rte_eth_dev *eth_dev = enic->rte_dev;
 450
 451         eth_dev->data->dev_link.link_speed = vnic_dev_port_speed(enic->vdev);
 452         eth_dev->data->dev_link.link_duplex = ETH_LINK_FULL_DUPLEX;
 453
 454         /* vnic notification of link status has already been turned on in
 455          * enic_dev_init() which is called during probe time.  Here we are
 456          * just turning on interrupt vector 0 if needed.
 457          */
 458         if (eth_dev->data->dev_conf.intr_conf.lsc)
 459                 vnic_dev_notify_set(enic->vdev, 0);
 460
 461         if (enic_clsf_init(enic))
 462                 dev_warning(enic, "Init of hash table for clsf failed."\
 463                         "Flow director feature will not work\n");
 464
 465         for (index = 0; index < enic->rq_count; index++) {
 466                 err = enic_alloc_rx_queue_mbufs(enic,
 467                         &enic->rq[enic_rte_rq_idx_to_sop_idx(index)]);
 468                 if (err) {
 469                         dev_err(enic, "Failed to alloc sop RX queue mbufs\n");
 470                         return err;
 471                 }
 472                 err = enic_alloc_rx_queue_mbufs(enic,
 473                         &enic->rq[enic_rte_rq_idx_to_data_idx(index)]);
 474                 if (err) {
 475                         /* release the allocated mbufs for the sop rq*/
 476                         enic_rxmbuf_queue_release(enic,
 477                                 &enic->rq[enic_rte_rq_idx_to_sop_idx(index)]);
 478
 479                         dev_err(enic, "Failed to alloc data RX queue mbufs\n");
 480                         return err;
 481                 }
 482         }
 483
 484         for (index = 0; index < enic->wq_count; index++)
 485                 enic_start_wq(enic, index);
 486         for (index = 0; index < enic->rq_count; index++)
 487                 enic_start_rq(enic, index);
 488
 489         vnic_dev_add_addr(enic->vdev, enic->mac_addr);
 490
 491         vnic_dev_enable_wait(enic->vdev);
 492
 493         /* Register and enable error interrupt */
 494         rte_intr_callback_register(&(enic->pdev->intr_handle),
 495                 enic_intr_handler, (void *)enic->rte_dev);
 496
 497         rte_intr_enable(&(enic->pdev->intr_handle));
 498         vnic_intr_unmask(&enic->intr);
 499
 500         return 0;
 501 }
 502
 503 int enic_alloc_intr_resources(struct enic *enic)
 504 {
 505         int err;
 506
 507         dev_info(enic, "vNIC resources used:  "\
 508                 "wq %d rq %d cq %d intr %d\n",
 509                 enic->wq_count, enic_vnic_rq_count(enic),
 510                 enic->cq_count, enic->intr_count);
 511
 512         err = vnic_intr_alloc(enic->vdev, &enic->intr, 0);
 513         if (err)
 514                 enic_free_vnic_resources(enic);
 515
 516         return err;
 517 }
 518
 519 void enic_free_rq(void *rxq)
 520 {
 521         struct vnic_rq *rq_sop, *rq_data;
 522         struct enic *enic;
 523
 524         if (rxq == NULL)
 525                 return;
 526
 527         rq_sop = (struct vnic_rq *)rxq;
 528         enic = vnic_dev_priv(rq_sop->vdev);
 529         rq_data = &enic->rq[rq_sop->data_queue_idx];
 530
 531         enic_rxmbuf_queue_release(enic, rq_sop);
 532         if (rq_data->in_use)
 533                 enic_rxmbuf_queue_release(enic, rq_data);
 534
 535         rte_free(rq_sop->mbuf_ring);
 536         if (rq_data->in_use)
 537                 rte_free(rq_data->mbuf_ring);
 538
 539         rq_sop->mbuf_ring = NULL;
 540         rq_data->mbuf_ring = NULL;
 541
 542         vnic_rq_free(rq_sop);
 543         if (rq_data->in_use)
 544                 vnic_rq_free(rq_data);
 545
 546         vnic_cq_free(&enic->cq[enic_sop_rq_idx_to_cq_idx(rq_sop->index)]);
 547
 548         rq_sop->in_use = 0;
 549         rq_data->in_use = 0;
 550 }
 551
 552 void enic_start_wq(struct enic *enic, uint16_t queue_idx)
 553 {
 554         struct rte_eth_dev *eth_dev = enic->rte_dev;
 555         vnic_wq_enable(&enic->wq[queue_idx]);
 556         eth_dev->data->tx_queue_state[queue_idx] = RTE_ETH_QUEUE_STATE_STARTED;
 557 }
 558
 559 int enic_stop_wq(struct enic *enic, uint16_t queue_idx)
 560 {
 561         struct rte_eth_dev *eth_dev = enic->rte_dev;
 562         int ret;
 563
 564         ret = vnic_wq_disable(&enic->wq[queue_idx]);
 565         if (ret)
 566                 return ret;
 567
 568         eth_dev->data->tx_queue_state[queue_idx] = RTE_ETH_QUEUE_STATE_STOPPED;
 569         return 0;
 570 }
 571
 572 void enic_start_rq(struct enic *enic, uint16_t queue_idx)
 573 {
 574         struct vnic_rq *rq_sop;
 575         struct vnic_rq *rq_data;
 576         rq_sop = &enic->rq[enic_rte_rq_idx_to_sop_idx(queue_idx)];
 577         rq_data = &enic->rq[rq_sop->data_queue_idx];
 578         struct rte_eth_dev *eth_dev = enic->rte_dev;
 579
 580         if (rq_data->in_use)
 581                 vnic_rq_enable(rq_data);
 582         rte_mb();
 583         vnic_rq_enable(rq_sop);
 584         eth_dev->data->rx_queue_state[queue_idx] = RTE_ETH_QUEUE_STATE_STARTED;
 585 }
 586
 587 int enic_stop_rq(struct enic *enic, uint16_t queue_idx)
 588 {
 589         int ret1 = 0, ret2 = 0;
 590         struct rte_eth_dev *eth_dev = enic->rte_dev;
 591         struct vnic_rq *rq_sop;
 592         struct vnic_rq *rq_data;
 593         rq_sop = &enic->rq[enic_rte_rq_idx_to_sop_idx(queue_idx)];
 594         rq_data = &enic->rq[rq_sop->data_queue_idx];
 595
 596         ret2 = vnic_rq_disable(rq_sop);
 597         rte_mb();
 598         if (rq_data->in_use)
 599                 ret1 = vnic_rq_disable(rq_data);
 600
 601         if (ret2)
 602                 return ret2;
 603         else if (ret1)
 604                 return ret1;
 605
 606         eth_dev->data->rx_queue_state[queue_idx] = RTE_ETH_QUEUE_STATE_STOPPED;
 607         return 0;
 608 }
 609
 610 int enic_alloc_rq(struct enic *enic, uint16_t queue_idx,
 611         unsigned int socket_id, struct rte_mempool *mp,
 612         uint16_t nb_desc, uint16_t free_thresh)
 613 {
 614         int rc;
 615         uint16_t sop_queue_idx = enic_rte_rq_idx_to_sop_idx(queue_idx);
 616         uint16_t data_queue_idx = enic_rte_rq_idx_to_data_idx(queue_idx);
 617         struct vnic_rq *rq_sop = &enic->rq[sop_queue_idx];
 618         struct vnic_rq *rq_data = &enic->rq[data_queue_idx];
 619         unsigned int mbuf_size, mbufs_per_pkt;
 620         unsigned int nb_sop_desc, nb_data_desc;
 621         uint16_t min_sop, max_sop, min_data, max_data;
 622         uint16_t mtu = enic->rte_dev->data->mtu;
 623
 624         rq_sop->is_sop = 1;
 625         rq_sop->data_queue_idx = data_queue_idx;
 626         rq_data->is_sop = 0;
 627         rq_data->data_queue_idx = 0;
 628         rq_sop->socket_id = socket_id;
 629         rq_sop->mp = mp;
 630         rq_data->socket_id = socket_id;
 631         rq_data->mp = mp;
 632         rq_sop->in_use = 1;
 633         rq_sop->rx_free_thresh = free_thresh;
 634         rq_data->rx_free_thresh = free_thresh;
 635         dev_debug(enic, "Set queue_id:%u free thresh:%u\n", queue_idx,
 636                   free_thresh);
 637
 638         mbuf_size = (uint16_t)(rte_pktmbuf_data_room_size(mp) -
 639                                RTE_PKTMBUF_HEADROOM);
 640
 641         if (enic->rte_dev->data->dev_conf.rxmode.enable_scatter) {
 642                 dev_info(enic, "Rq %u Scatter rx mode enabled\n", queue_idx);
 643                 /* ceil((mtu + ETHER_HDR_LEN + 4)/mbuf_size) */
 644                 mbufs_per_pkt = ((mtu + ETHER_HDR_LEN + 4) +
 645                                  (mbuf_size - 1)) / mbuf_size;
 646         } else {
 647                 dev_info(enic, "Scatter rx mode disabled\n");
 648                 mbufs_per_pkt = 1;
 649         }
 650
 651         if (mbufs_per_pkt > 1) {
 652                 dev_info(enic, "Rq %u Scatter rx mode in use\n", queue_idx);
 653                 rq_sop->data_queue_enable = 1;
 654                 rq_data->in_use = 1;
 655         } else {
 656                 dev_info(enic, "Rq %u Scatter rx mode not being used\n",
 657                          queue_idx);
 658                 rq_sop->data_queue_enable = 0;
 659                 rq_data->in_use = 0;
 660         }
 661
 662         /* number of descriptors have to be a multiple of 32 */
 663         nb_sop_desc = (nb_desc / mbufs_per_pkt) & ~0x1F;
 664         nb_data_desc = (nb_desc - nb_sop_desc) & ~0x1F;
 665
 666         rq_sop->max_mbufs_per_pkt = mbufs_per_pkt;
 667         rq_data->max_mbufs_per_pkt = mbufs_per_pkt;
 668
 669         if (mbufs_per_pkt > 1) {
 670                 min_sop = 64;
 671                 max_sop = ((enic->config.rq_desc_count /
 672                             (mbufs_per_pkt - 1)) & ~0x1F);
 673                 min_data = min_sop * (mbufs_per_pkt - 1);
 674                 max_data = enic->config.rq_desc_count;
 675         } else {
 676                 min_sop = 64;
 677                 max_sop = enic->config.rq_desc_count;
 678                 min_data = 0;
 679                 max_data = 0;
 680         }
 681
 682         if (nb_desc < (min_sop + min_data)) {
 683                 dev_warning(enic,
 684                             "Number of rx descs too low, adjusting to minimum\n");
 685                 nb_sop_desc = min_sop;
 686                 nb_data_desc = min_data;
 687         } else if (nb_desc > (max_sop + max_data)) {
 688                 dev_warning(enic,
 689                             "Number of rx_descs too high, adjusting to maximum\n");
 690                 nb_sop_desc = max_sop;
 691                 nb_data_desc = max_data;
 692         }
 693         if (mbufs_per_pkt > 1) {
 694                 dev_info(enic, "For mtu %d and mbuf size %d valid rx descriptor range is %d to %d\n",
 695                          mtu, mbuf_size, min_sop + min_data,
 696                          max_sop + max_data);
 697         }
 698         dev_info(enic, "Using %d rx descriptors (sop %d, data %d)\n",
 699                  nb_sop_desc + nb_data_desc, nb_sop_desc, nb_data_desc);
 700
 701         /* Allocate sop queue resources */
 702         rc = vnic_rq_alloc(enic->vdev, rq_sop, sop_queue_idx,
 703                 nb_sop_desc, sizeof(struct rq_enet_desc));
 704         if (rc) {
 705                 dev_err(enic, "error in allocation of sop rq\n");
 706                 goto err_exit;
 707         }
 708         nb_sop_desc = rq_sop->ring.desc_count;
 709
 710         if (rq_data->in_use) {
 711                 /* Allocate data queue resources */
 712                 rc = vnic_rq_alloc(enic->vdev, rq_data, data_queue_idx,
 713                                    nb_data_desc,
 714                                    sizeof(struct rq_enet_desc));
 715                 if (rc) {
 716                         dev_err(enic, "error in allocation of data rq\n");
 717                         goto err_free_rq_sop;
 718                 }
 719                 nb_data_desc = rq_data->ring.desc_count;
 720         }
 721         rc = vnic_cq_alloc(enic->vdev, &enic->cq[queue_idx], queue_idx,
 722                            socket_id, nb_sop_desc + nb_data_desc,
 723                            sizeof(struct cq_enet_rq_desc));
 724         if (rc) {
 725                 dev_err(enic, "error in allocation of cq for rq\n");
 726                 goto err_free_rq_data;
 727         }
 728
 729         /* Allocate the mbuf rings */
 730         rq_sop->mbuf_ring = (struct rte_mbuf **)
 731                 rte_zmalloc_socket("rq->mbuf_ring",
 732                                    sizeof(struct rte_mbuf *) * nb_sop_desc,
 733                                    RTE_CACHE_LINE_SIZE, rq_sop->socket_id);
 734         if (rq_sop->mbuf_ring == NULL)
 735                 goto err_free_cq;
 736
 737         if (rq_data->in_use) {
 738                 rq_data->mbuf_ring = (struct rte_mbuf **)
 739                         rte_zmalloc_socket("rq->mbuf_ring",
 740                                 sizeof(struct rte_mbuf *) * nb_data_desc,
 741                                 RTE_CACHE_LINE_SIZE, rq_sop->socket_id);
 742                 if (rq_data->mbuf_ring == NULL)
 743                         goto err_free_sop_mbuf;
 744         }
 745
 746         rq_sop->tot_nb_desc = nb_desc; /* squirl away for MTU update function */
 747
 748         return 0;
 749
 750 err_free_sop_mbuf:
 751         rte_free(rq_sop->mbuf_ring);
 752 err_free_cq:
 753         /* cleanup on error */
 754         vnic_cq_free(&enic->cq[queue_idx]);
 755 err_free_rq_data:
 756         if (rq_data->in_use)
 757                 vnic_rq_free(rq_data);
 758 err_free_rq_sop:
 759         vnic_rq_free(rq_sop);
 760 err_exit:
 761         return -ENOMEM;
 762 }
 763
 764 void enic_free_wq(void *txq)
 765 {
 766         struct vnic_wq *wq;
 767         struct enic *enic;
 768
 769         if (txq == NULL)
 770                 return;
 771
 772         wq = (struct vnic_wq *)txq;
 773         enic = vnic_dev_priv(wq->vdev);
 774         rte_memzone_free(wq->cqmsg_rz);
 775         vnic_wq_free(wq);
 776         vnic_cq_free(&enic->cq[enic->rq_count + wq->index]);
 777 }
 778
 779 int enic_alloc_wq(struct enic *enic, uint16_t queue_idx,
 780         unsigned int socket_id, uint16_t nb_desc)
 781 {
 782         int err;
 783         struct vnic_wq *wq = &enic->wq[queue_idx];
 784         unsigned int cq_index = enic_cq_wq(enic, queue_idx);
 785         char name[NAME_MAX];
 786         static int instance;
 787
 788         wq->socket_id = socket_id;
 789         if (nb_desc) {
 790                 if (nb_desc > enic->config.wq_desc_count) {
 791                         dev_warning(enic,
 792                                 "WQ %d - number of tx desc in cmd line (%d)"\
 793                                 "is greater than that in the UCSM/CIMC adapter"\
 794                                 "policy.  Applying the value in the adapter "\
 795                                 "policy (%d)\n",
 796                                 queue_idx, nb_desc, enic->config.wq_desc_count);
 797                 } else if (nb_desc != enic->config.wq_desc_count) {
 798                         enic->config.wq_desc_count = nb_desc;
 799                         dev_info(enic,
 800                                 "TX Queues - effective number of descs:%d\n",
 801                                 nb_desc);
 802                 }
 803         }
 804
 805         /* Allocate queue resources */
 806         err = vnic_wq_alloc(enic->vdev, &enic->wq[queue_idx], queue_idx,
 807                 enic->config.wq_desc_count,
 808                 sizeof(struct wq_enet_desc));
 809         if (err) {
 810                 dev_err(enic, "error in allocation of wq\n");
 811                 return err;
 812         }
 813
 814         err = vnic_cq_alloc(enic->vdev, &enic->cq[cq_index], cq_index,
 815                 socket_id, enic->config.wq_desc_count,
 816                 sizeof(struct cq_enet_wq_desc));
 817         if (err) {
 818                 vnic_wq_free(wq);
 819                 dev_err(enic, "error in allocation of cq for wq\n");
 820         }
 821
 822         /* setup up CQ message */
 823         snprintf((char *)name, sizeof(name),
 824                  "vnic_cqmsg-%s-%d-%d", enic->bdf_name, queue_idx,
 825                 instance++);
 826
 827         wq->cqmsg_rz = rte_memzone_reserve_aligned((const char *)name,
 828                                                    sizeof(uint32_t),
 829                                                    SOCKET_ID_ANY, 0,
 830                                                    ENIC_ALIGN);
 831         if (!wq->cqmsg_rz)
 832                 return -ENOMEM;
 833
 834         return err;
 835 }
 836
 837 int enic_disable(struct enic *enic)
 838 {
 839         unsigned int i;
 840         int err;
 841
 842         vnic_intr_mask(&enic->intr);
 843         (void)vnic_intr_masked(&enic->intr); /* flush write */
 844         rte_intr_disable(&enic->pdev->intr_handle);
 845         rte_intr_callback_unregister(&enic->pdev->intr_handle,
 846                                      enic_intr_handler,
 847                                      (void *)enic->rte_dev);
 848
 849         vnic_dev_disable(enic->vdev);
 850
 851         enic_clsf_destroy(enic);
 852
 853         if (!enic_is_sriov_vf(enic))
 854                 vnic_dev_del_addr(enic->vdev, enic->mac_addr);
 855
 856         for (i = 0; i < enic->wq_count; i++) {
 857                 err = vnic_wq_disable(&enic->wq[i]);
 858                 if (err)
 859                         return err;
 860         }
 861         for (i = 0; i < enic_vnic_rq_count(enic); i++) {
 862                 if (enic->rq[i].in_use) {
 863                         err = vnic_rq_disable(&enic->rq[i]);
 864                         if (err)
 865                                 return err;
 866                 }
 867         }
 868
 869         /* If we were using interrupts, set the interrupt vector to -1
 870          * to disable interrupts.  We are not disabling link notifcations,
 871          * though, as we want the polling of link status to continue working.
 872          */
 873         if (enic->rte_dev->data->dev_conf.intr_conf.lsc)
 874                 vnic_dev_notify_set(enic->vdev, -1);
 875
 876         vnic_dev_set_reset_flag(enic->vdev, 1);
 877
 878         for (i = 0; i < enic->wq_count; i++)
 879                 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
 880
 881         for (i = 0; i < enic_vnic_rq_count(enic); i++)
 882                 if (enic->rq[i].in_use)
 883                         vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
 884         for (i = 0; i < enic->cq_count; i++)
 885                 vnic_cq_clean(&enic->cq[i]);
 886         vnic_intr_clean(&enic->intr);
 887
 888         return 0;
 889 }
 890
 891 static int enic_dev_wait(struct vnic_dev *vdev,
 892         int (*start)(struct vnic_dev *, int),
 893         int (*finished)(struct vnic_dev *, int *),
 894         int arg)
 895 {
 896         int done;
 897         int err;
 898         int i;
 899
 900         err = start(vdev, arg);
 901         if (err)
 902                 return err;
 903
 904         /* Wait for func to complete...2 seconds max */
 905         for (i = 0; i < 2000; i++) {
 906                 err = finished(vdev, &done);
 907                 if (err)
 908                         return err;
 909                 if (done)
 910                         return 0;
 911                 usleep(1000);
 912         }
 913         return -ETIMEDOUT;
 914 }
 915
 916 static int enic_dev_open(struct enic *enic)
 917 {
 918         int err;
 919
 920         err = enic_dev_wait(enic->vdev, vnic_dev_open,
 921                 vnic_dev_open_done, 0);
 922         if (err)
 923                 dev_err(enic_get_dev(enic),
 924                         "vNIC device open failed, err %d\n", err);
 925
 926         return err;
 927 }
 928
 929 static int enic_set_rsskey(struct enic *enic)
 930 {
 931         dma_addr_t rss_key_buf_pa;
 932         union vnic_rss_key *rss_key_buf_va = NULL;
 933         static union vnic_rss_key rss_key = {
 934                 .key = {
 935                         [0] = {.b = {85, 67, 83, 97, 119, 101, 115, 111, 109, 101}},
 936                         [1] = {.b = {80, 65, 76, 79, 117, 110, 105, 113, 117, 101}},
 937                         [2] = {.b = {76, 73, 78, 85, 88, 114, 111, 99, 107, 115}},
 938                         [3] = {.b = {69, 78, 73, 67, 105, 115, 99, 111, 111, 108}},
 939                 }
 940         };
 941         int err;
 942         u8 name[NAME_MAX];
 943
 944         snprintf((char *)name, NAME_MAX, "rss_key-%s", enic->bdf_name);
 945         rss_key_buf_va = enic_alloc_consistent(enic, sizeof(union vnic_rss_key),
 946                 &rss_key_buf_pa, name);
 947         if (!rss_key_buf_va)
 948                 return -ENOMEM;
 949
 950         rte_memcpy(rss_key_buf_va, &rss_key, sizeof(union vnic_rss_key));
 951
 952         err = enic_set_rss_key(enic,
 953                 rss_key_buf_pa,
 954                 sizeof(union vnic_rss_key));
 955
 956         enic_free_consistent(enic, sizeof(union vnic_rss_key),
 957                 rss_key_buf_va, rss_key_buf_pa);
 958
 959         return err;
 960 }
 961
 962 static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits)
 963 {
 964         dma_addr_t rss_cpu_buf_pa;
 965         union vnic_rss_cpu *rss_cpu_buf_va = NULL;
 966         int i;
 967         int err;
 968         u8 name[NAME_MAX];
 969
 970         snprintf((char *)name, NAME_MAX, "rss_cpu-%s", enic->bdf_name);
 971         rss_cpu_buf_va = enic_alloc_consistent(enic, sizeof(union vnic_rss_cpu),
 972                 &rss_cpu_buf_pa, name);
 973         if (!rss_cpu_buf_va)
 974                 return -ENOMEM;
 975
 976         for (i = 0; i < (1 << rss_hash_bits); i++)
 977                 (*rss_cpu_buf_va).cpu[i / 4].b[i % 4] =
 978                         enic_rte_rq_idx_to_sop_idx(i % enic->rq_count);
 979
 980         err = enic_set_rss_cpu(enic,
 981                 rss_cpu_buf_pa,
 982                 sizeof(union vnic_rss_cpu));
 983
 984         enic_free_consistent(enic, sizeof(union vnic_rss_cpu),
 985                 rss_cpu_buf_va, rss_cpu_buf_pa);
 986
 987         return err;
 988 }
 989
 990 static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu,
 991         u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable)
 992 {
 993         const u8 tso_ipid_split_en = 0;
 994         int err;
 995
 996         /* Enable VLAN tag stripping */
 997
 998         err = enic_set_nic_cfg(enic,
 999                 rss_default_cpu, rss_hash_type,
1000                 rss_hash_bits, rss_base_cpu,
1001                 rss_enable, tso_ipid_split_en,
1002                 enic->ig_vlan_strip_en);
1003
1004         return err;
1005 }
1006
1007 int enic_set_rss_nic_cfg(struct enic *enic)
1008 {
1009         const u8 rss_default_cpu = 0;
1010         const u8 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 |
1011             NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 |
1012             NIC_CFG_RSS_HASH_TYPE_IPV6 |
1013             NIC_CFG_RSS_HASH_TYPE_TCP_IPV6;
1014         const u8 rss_hash_bits = 7;
1015         const u8 rss_base_cpu = 0;
1016         u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1);
1017
1018         if (rss_enable) {
1019                 if (!enic_set_rsskey(enic)) {
1020                         if (enic_set_rsscpu(enic, rss_hash_bits)) {
1021                                 rss_enable = 0;
1022                                 dev_warning(enic, "RSS disabled, "\
1023                                         "Failed to set RSS cpu indirection table.");
1024                         }
1025                 } else {
1026                         rss_enable = 0;
1027                         dev_warning(enic,
1028                                 "RSS disabled, Failed to set RSS key.\n");
1029                 }
1030         }
1031
1032         return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type,
1033                 rss_hash_bits, rss_base_cpu, rss_enable);
1034 }
1035
1036 int enic_setup_finish(struct enic *enic)
1037 {
1038         int ret;
1039
1040         enic_init_soft_stats(enic);
1041
1042         ret = enic_set_rss_nic_cfg(enic);
1043         if (ret) {
1044                 dev_err(enic, "Failed to config nic, aborting.\n");
1045                 return -1;
1046         }
1047
1048         /* Default conf */
1049         vnic_dev_packet_filter(enic->vdev,
1050                 1 /* directed  */,
1051                 1 /* multicast */,
1052                 1 /* broadcast */,
1053                 0 /* promisc   */,
1054                 1 /* allmulti  */);
1055
1056         enic->promisc = 0;
1057         enic->allmulti = 1;
1058
1059         return 0;
1060 }
1061
1062 void enic_add_packet_filter(struct enic *enic)
1063 {
1064         /* Args -> directed, multicast, broadcast, promisc, allmulti */
1065         vnic_dev_packet_filter(enic->vdev, 1, 1, 1,
1066                 enic->promisc, enic->allmulti);
1067 }
1068
1069 int enic_get_link_status(struct enic *enic)
1070 {
1071         return vnic_dev_link_status(enic->vdev);
1072 }
1073
1074 static void enic_dev_deinit(struct enic *enic)
1075 {
1076         struct rte_eth_dev *eth_dev = enic->rte_dev;
1077
1078         /* stop link status checking */
1079         vnic_dev_notify_unset(enic->vdev);
1080
1081         rte_free(eth_dev->data->mac_addrs);
1082 }
1083
1084
1085 int enic_set_vnic_res(struct enic *enic)
1086 {
1087         struct rte_eth_dev *eth_dev = enic->rte_dev;
1088         int rc = 0;
1089
1090         /* With Rx scatter support, two RQs are now used per RQ used by
1091          * the application.
1092          */
1093         if (enic->conf_rq_count < eth_dev->data->nb_rx_queues) {
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                         eth_dev->data->nb_rx_queues * 2, enic->conf_rq_count);
1097                 rc = -EINVAL;
1098         }
1099         if (enic->conf_wq_count < eth_dev->data->nb_tx_queues) {
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 < (eth_dev->data->nb_rx_queues +
1106                                    eth_dev->data->nb_tx_queues)) {
1107                 dev_err(dev, "Not enough Completion queues. Required:%u, Configured:%u\n",
1108                         (eth_dev->data->nb_rx_queues +
1109                          eth_dev->data->nb_tx_queues), enic->conf_cq_count);
1110                 rc = -EINVAL;
1111         }
1112
1113         if (rc == 0) {
1114                 enic->rq_count = eth_dev->data->nb_rx_queues;
1115                 enic->wq_count = eth_dev->data->nb_tx_queues;
1116                 enic->cq_count = enic->rq_count + enic->wq_count;
1117         }
1118
1119         return rc;
1120 }
1121
1122 /* Initialize the completion queue for an RQ */
1123 static int
1124 enic_reinit_rq(struct enic *enic, unsigned int rq_idx)
1125 {
1126         struct vnic_rq *sop_rq, *data_rq;
1127         unsigned int cq_idx = enic_cq_rq(enic, rq_idx);
1128         int rc = 0;
1129
1130         sop_rq = &enic->rq[enic_rte_rq_idx_to_sop_idx(rq_idx)];
1131         data_rq = &enic->rq[enic_rte_rq_idx_to_data_idx(rq_idx)];
1132
1133         vnic_cq_clean(&enic->cq[cq_idx]);
1134         vnic_cq_init(&enic->cq[cq_idx],
1135                      0 /* flow_control_enable */,
1136                      1 /* color_enable */,
1137                      0 /* cq_head */,
1138                      0 /* cq_tail */,
1139                      1 /* cq_tail_color */,
1140                      0 /* interrupt_enable */,
1141                      1 /* cq_entry_enable */,
1142                      0 /* cq_message_enable */,
1143                      0 /* interrupt offset */,
1144                      0 /* cq_message_addr */);
1145
1146
1147         vnic_rq_init_start(sop_rq, enic_cq_rq(enic,
1148                            enic_rte_rq_idx_to_sop_idx(rq_idx)), 0,
1149                            sop_rq->ring.desc_count - 1, 1, 0);
1150         if (data_rq->in_use) {
1151                 vnic_rq_init_start(data_rq,
1152                                    enic_cq_rq(enic,
1153                                    enic_rte_rq_idx_to_data_idx(rq_idx)), 0,
1154                                    data_rq->ring.desc_count - 1, 1, 0);
1155         }
1156
1157         rc = enic_alloc_rx_queue_mbufs(enic, sop_rq);
1158         if (rc)
1159                 return rc;
1160
1161         if (data_rq->in_use) {
1162                 rc = enic_alloc_rx_queue_mbufs(enic, data_rq);
1163                 if (rc) {
1164                         enic_rxmbuf_queue_release(enic, sop_rq);
1165                         return rc;
1166                 }
1167         }
1168
1169         return 0;
1170 }
1171
1172 /* The Cisco NIC can send and receive packets up to a max packet size
1173  * determined by the NIC type and firmware. There is also an MTU
1174  * configured into the NIC via the CIMC/UCSM management interface
1175  * which can be overridden by this function (up to the max packet size).
1176  * Depending on the network setup, doing so may cause packet drops
1177  * and unexpected behavior.
1178  */
1179 int enic_set_mtu(struct enic *enic, uint16_t new_mtu)
1180 {
1181         unsigned int rq_idx;
1182         struct vnic_rq *rq;
1183         int rc = 0;
1184         uint16_t old_mtu;       /* previous setting */
1185         uint16_t config_mtu;    /* Value configured into NIC via CIMC/UCSM */
1186         struct rte_eth_dev *eth_dev = enic->rte_dev;
1187
1188         old_mtu = eth_dev->data->mtu;
1189         config_mtu = enic->config.mtu;
1190
1191         if (new_mtu > enic->max_mtu) {
1192                 dev_err(enic,
1193                         "MTU not updated: requested (%u) greater than max (%u)\n",
1194                         new_mtu, enic->max_mtu);
1195                 return -EINVAL;
1196         }
1197         if (new_mtu < ENIC_MIN_MTU) {
1198                 dev_info(enic,
1199                         "MTU not updated: requested (%u) less than min (%u)\n",
1200                         new_mtu, ENIC_MIN_MTU);
1201                 return -EINVAL;
1202         }
1203         if (new_mtu > config_mtu)
1204                 dev_warning(enic,
1205                         "MTU (%u) is greater than value configured in NIC (%u)\n",
1206                         new_mtu, config_mtu);
1207
1208         /* The easy case is when scatter is disabled. However if the MTU
1209          * becomes greater than the mbuf data size, packet drops will ensue.
1210          */
1211         if (!enic->rte_dev->data->dev_conf.rxmode.enable_scatter) {
1212                 eth_dev->data->mtu = new_mtu;
1213                 goto set_mtu_done;
1214         }
1215
1216         /* Rx scatter is enabled so reconfigure RQ's on the fly. The point is to
1217          * change Rx scatter mode if necessary for better performance. I.e. if
1218          * MTU was greater than the mbuf size and now it's less, scatter Rx
1219          * doesn't have to be used and vice versa.
1220           */
1221         rte_spinlock_lock(&enic->mtu_lock);
1222
1223         /* Stop traffic on all RQs */
1224         for (rq_idx = 0; rq_idx < enic->rq_count * 2; rq_idx++) {
1225                 rq = &enic->rq[rq_idx];
1226                 if (rq->is_sop && rq->in_use) {
1227                         rc = enic_stop_rq(enic,
1228                                           enic_sop_rq_idx_to_rte_idx(rq_idx));
1229                         if (rc) {
1230                                 dev_err(enic, "Failed to stop Rq %u\n", rq_idx);
1231                                 goto set_mtu_done;
1232                         }
1233                 }
1234         }
1235
1236         /* replace Rx funciton with a no-op to avoid getting stale pkts */
1237         eth_dev->rx_pkt_burst = enic_dummy_recv_pkts;
1238         rte_mb();
1239
1240         /* Allow time for threads to exit the real Rx function. */
1241         usleep(100000);
1242
1243         /* now it is safe to reconfigure the RQs */
1244
1245         /* update the mtu */
1246         eth_dev->data->mtu = new_mtu;
1247
1248         /* free and reallocate RQs with the new MTU */
1249         for (rq_idx = 0; rq_idx < enic->rq_count; rq_idx++) {
1250                 rq = &enic->rq[enic_rte_rq_idx_to_sop_idx(rq_idx)];
1251
1252                 enic_free_rq(rq);
1253                 rc = enic_alloc_rq(enic, rq_idx, rq->socket_id, rq->mp,
1254                                    rq->tot_nb_desc, rq->rx_free_thresh);
1255                 if (rc) {
1256                         dev_err(enic,
1257                                 "Fatal MTU alloc error- No traffic will pass\n");
1258                         goto set_mtu_done;
1259                 }
1260
1261                 rc = enic_reinit_rq(enic, rq_idx);
1262                 if (rc) {
1263                         dev_err(enic,
1264                                 "Fatal MTU RQ reinit- No traffic will pass\n");
1265                         goto set_mtu_done;
1266                 }
1267         }
1268
1269         /* put back the real receive function */
1270         rte_mb();
1271         eth_dev->rx_pkt_burst = enic_recv_pkts;
1272         rte_mb();
1273
1274         /* restart Rx traffic */
1275         for (rq_idx = 0; rq_idx < enic->rq_count; rq_idx++) {
1276                 rq = &enic->rq[enic_rte_rq_idx_to_sop_idx(rq_idx)];
1277                 if (rq->is_sop && rq->in_use)
1278                         enic_start_rq(enic, rq_idx);
1279         }
1280
1281 set_mtu_done:
1282         dev_info(enic, "MTU changed from %u to %u\n",  old_mtu, new_mtu);
1283         rte_spinlock_unlock(&enic->mtu_lock);
1284         return rc;
1285 }
1286
1287 static int enic_dev_init(struct enic *enic)
1288 {
1289         int err;
1290         struct rte_eth_dev *eth_dev = enic->rte_dev;
1291
1292         vnic_dev_intr_coal_timer_info_default(enic->vdev);
1293
1294         /* Get vNIC configuration
1295         */
1296         err = enic_get_vnic_config(enic);
1297         if (err) {
1298                 dev_err(dev, "Get vNIC configuration failed, aborting\n");
1299                 return err;
1300         }
1301
1302         /* Get available resource counts */
1303         enic_get_res_counts(enic);
1304         if (enic->conf_rq_count == 1) {
1305                 dev_err(enic, "Running with only 1 RQ configured in the vNIC is not supported.\n");
1306                 dev_err(enic, "Please configure 2 RQs in the vNIC for each Rx queue used by DPDK.\n");
1307                 dev_err(enic, "See the ENIC PMD guide for more information.\n");
1308                 return -EINVAL;
1309         }
1310
1311         /* Get the supported filters */
1312         enic_fdir_info(enic);
1313
1314         eth_dev->data->mac_addrs = rte_zmalloc("enic_mac_addr", ETH_ALEN, 0);
1315         if (!eth_dev->data->mac_addrs) {
1316                 dev_err(enic, "mac addr storage alloc failed, aborting.\n");
1317                 return -1;
1318         }
1319         ether_addr_copy((struct ether_addr *) enic->mac_addr,
1320                 &eth_dev->data->mac_addrs[0]);
1321
1322         vnic_dev_set_reset_flag(enic->vdev, 0);
1323
1324         /* set up link status checking */
1325         vnic_dev_notify_set(enic->vdev, -1); /* No Intr for notify */
1326
1327         return 0;
1328
1329 }
1330
1331 int enic_probe(struct enic *enic)
1332 {
1333         struct rte_pci_device *pdev = enic->pdev;
1334         int err = -1;
1335
1336         dev_debug(enic, " Initializing ENIC PMD\n");
1337
1338         enic->bar0.vaddr = (void *)pdev->mem_resource[0].addr;
1339         enic->bar0.len = pdev->mem_resource[0].len;
1340
1341         /* Register vNIC device */
1342         enic->vdev = vnic_dev_register(NULL, enic, enic->pdev, &enic->bar0, 1);
1343         if (!enic->vdev) {
1344                 dev_err(enic, "vNIC registration failed, aborting\n");
1345                 goto err_out;
1346         }
1347
1348         LIST_INIT(&enic->memzone_list);
1349         rte_spinlock_init(&enic->memzone_list_lock);
1350
1351         vnic_register_cbacks(enic->vdev,
1352                 enic_alloc_consistent,
1353                 enic_free_consistent);
1354
1355         /* Issue device open to get device in known state */
1356         err = enic_dev_open(enic);
1357         if (err) {
1358                 dev_err(enic, "vNIC dev open failed, aborting\n");
1359                 goto err_out_unregister;
1360         }
1361
1362         /* Set ingress vlan rewrite mode before vnic initialization */
1363         err = vnic_dev_set_ig_vlan_rewrite_mode(enic->vdev,
1364                 IG_VLAN_REWRITE_MODE_PASS_THRU);
1365         if (err) {
1366                 dev_err(enic,
1367                         "Failed to set ingress vlan rewrite mode, aborting.\n");
1368                 goto err_out_dev_close;
1369         }
1370
1371         /* Issue device init to initialize the vnic-to-switch link.
1372          * We'll start with carrier off and wait for link UP
1373          * notification later to turn on carrier.  We don't need
1374          * to wait here for the vnic-to-switch link initialization
1375          * to complete; link UP notification is the indication that
1376          * the process is complete.
1377          */
1378
1379         err = vnic_dev_init(enic->vdev, 0);
1380         if (err) {
1381                 dev_err(enic, "vNIC dev init failed, aborting\n");
1382                 goto err_out_dev_close;
1383         }
1384
1385         err = enic_dev_init(enic);
1386         if (err) {
1387                 dev_err(enic, "Device initialization failed, aborting\n");
1388                 goto err_out_dev_close;
1389         }
1390
1391         return 0;
1392
1393 err_out_dev_close:
1394         vnic_dev_close(enic->vdev);
1395 err_out_unregister:
1396         vnic_dev_unregister(enic->vdev);
1397 err_out:
1398         return err;
1399 }
1400
1401 void enic_remove(struct enic *enic)
1402 {
1403         enic_dev_deinit(enic);
1404         vnic_dev_close(enic->vdev);
1405         vnic_dev_unregister(enic->vdev);
1406 }