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_mempool_put(mbuf->pool, 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                 error_status = vnic_rq_error_status(&enic->rq[i]);
 127                 if (error_status)
 128                         dev_err(enic, "RQ[%d] error_status %d\n", i,
 129                                 error_status);
 130         }
 131 }
 132
 133 static void enic_clear_soft_stats(struct enic *enic)
 134 {
 135         struct enic_soft_stats *soft_stats = &enic->soft_stats;
 136         rte_atomic64_clear(&soft_stats->rx_nombuf);
 137         rte_atomic64_clear(&soft_stats->rx_packet_errors);
 138 }
 139
 140 static void enic_init_soft_stats(struct enic *enic)
 141 {
 142         struct enic_soft_stats *soft_stats = &enic->soft_stats;
 143         rte_atomic64_init(&soft_stats->rx_nombuf);
 144         rte_atomic64_init(&soft_stats->rx_packet_errors);
 145         enic_clear_soft_stats(enic);
 146 }
 147
 148 void enic_dev_stats_clear(struct enic *enic)
 149 {
 150         if (vnic_dev_stats_clear(enic->vdev))
 151                 dev_err(enic, "Error in clearing stats\n");
 152         enic_clear_soft_stats(enic);
 153 }
 154
 155 void enic_dev_stats_get(struct enic *enic, struct rte_eth_stats *r_stats)
 156 {
 157         struct vnic_stats *stats;
 158         struct enic_soft_stats *soft_stats = &enic->soft_stats;
 159         int64_t rx_truncated;
 160         uint64_t rx_packet_errors;
 161
 162         if (vnic_dev_stats_dump(enic->vdev, &stats)) {
 163                 dev_err(enic, "Error in getting stats\n");
 164                 return;
 165         }
 166
 167         /* The number of truncated packets can only be calculated by
 168          * subtracting a hardware counter from error packets received by
 169          * the driver. Note: this causes transient inaccuracies in the
 170          * ipackets count. Also, the length of truncated packets are
 171          * counted in ibytes even though truncated packets are dropped
 172          * which can make ibytes be slightly higher than it should be.
 173          */
 174         rx_packet_errors = rte_atomic64_read(&soft_stats->rx_packet_errors);
 175         rx_truncated = rx_packet_errors - stats->rx.rx_errors;
 176
 177         r_stats->ipackets = stats->rx.rx_frames_ok - rx_truncated;
 178         r_stats->opackets = stats->tx.tx_frames_ok;
 179
 180         r_stats->ibytes = stats->rx.rx_bytes_ok;
 181         r_stats->obytes = stats->tx.tx_bytes_ok;
 182
 183         r_stats->ierrors = stats->rx.rx_errors + stats->rx.rx_drop;
 184         r_stats->oerrors = stats->tx.tx_errors;
 185
 186         r_stats->imissed = stats->rx.rx_no_bufs + rx_truncated;
 187
 188         r_stats->rx_nombuf = rte_atomic64_read(&soft_stats->rx_nombuf);
 189 }
 190
 191 void enic_del_mac_address(struct enic *enic)
 192 {
 193         if (vnic_dev_del_addr(enic->vdev, enic->mac_addr))
 194                 dev_err(enic, "del mac addr failed\n");
 195 }
 196
 197 void enic_set_mac_address(struct enic *enic, uint8_t *mac_addr)
 198 {
 199         int err;
 200
 201         if (!is_eth_addr_valid(mac_addr)) {
 202                 dev_err(enic, "invalid mac address\n");
 203                 return;
 204         }
 205
 206         err = vnic_dev_del_addr(enic->vdev, mac_addr);
 207         if (err) {
 208                 dev_err(enic, "del mac addr failed\n");
 209                 return;
 210         }
 211
 212         ether_addr_copy((struct ether_addr *)mac_addr,
 213                 (struct ether_addr *)enic->mac_addr);
 214
 215         err = vnic_dev_add_addr(enic->vdev, mac_addr);
 216         if (err) {
 217                 dev_err(enic, "add mac addr failed\n");
 218                 return;
 219         }
 220 }
 221
 222 static void
 223 enic_free_rq_buf(struct rte_mbuf **mbuf)
 224 {
 225         if (*mbuf == NULL)
 226                 return;
 227
 228         rte_pktmbuf_free(*mbuf);
 229         mbuf = NULL;
 230 }
 231
 232 void enic_init_vnic_resources(struct enic *enic)
 233 {
 234         unsigned int error_interrupt_enable = 1;
 235         unsigned int error_interrupt_offset = 0;
 236         unsigned int index = 0;
 237         unsigned int cq_idx;
 238         struct vnic_rq *data_rq;
 239
 240         for (index = 0; index < enic->rq_count; index++) {
 241                 cq_idx = enic_cq_rq(enic, enic_sop_rq(index));
 242
 243                 vnic_rq_init(&enic->rq[enic_sop_rq(index)],
 244                         cq_idx,
 245                         error_interrupt_enable,
 246                         error_interrupt_offset);
 247
 248                 data_rq = &enic->rq[enic_data_rq(index)];
 249                 if (data_rq->in_use)
 250                         vnic_rq_init(data_rq,
 251                                      cq_idx,
 252                                      error_interrupt_enable,
 253                                      error_interrupt_offset);
 254
 255                 vnic_cq_init(&enic->cq[cq_idx],
 256                         0 /* flow_control_enable */,
 257                         1 /* color_enable */,
 258                         0 /* cq_head */,
 259                         0 /* cq_tail */,
 260                         1 /* cq_tail_color */,
 261                         0 /* interrupt_enable */,
 262                         1 /* cq_entry_enable */,
 263                         0 /* cq_message_enable */,
 264                         0 /* interrupt offset */,
 265                         0 /* cq_message_addr */);
 266         }
 267
 268         for (index = 0; index < enic->wq_count; index++) {
 269                 vnic_wq_init(&enic->wq[index],
 270                         enic_cq_wq(enic, index),
 271                         error_interrupt_enable,
 272                         error_interrupt_offset);
 273
 274                 cq_idx = enic_cq_wq(enic, index);
 275                 vnic_cq_init(&enic->cq[cq_idx],
 276                         0 /* flow_control_enable */,
 277                         1 /* color_enable */,
 278                         0 /* cq_head */,
 279                         0 /* cq_tail */,
 280                         1 /* cq_tail_color */,
 281                         0 /* interrupt_enable */,
 282                         0 /* cq_entry_enable */,
 283                         1 /* cq_message_enable */,
 284                         0 /* interrupt offset */,
 285                         (u64)enic->wq[index].cqmsg_rz->phys_addr);
 286         }
 287
 288         vnic_intr_init(&enic->intr,
 289                 enic->config.intr_timer_usec,
 290                 enic->config.intr_timer_type,
 291                 /*mask_on_assertion*/1);
 292 }
 293
 294
 295 static int
 296 enic_alloc_rx_queue_mbufs(struct enic *enic, struct vnic_rq *rq)
 297 {
 298         struct rte_mbuf *mb;
 299         struct rq_enet_desc *rqd = rq->ring.descs;
 300         unsigned i;
 301         dma_addr_t dma_addr;
 302
 303         if (!rq->in_use)
 304                 return 0;
 305
 306         dev_debug(enic, "queue %u, allocating %u rx queue mbufs\n", rq->index,
 307                   rq->ring.desc_count);
 308
 309         for (i = 0; i < rq->ring.desc_count; i++, rqd++) {
 310                 mb = rte_mbuf_raw_alloc(rq->mp);
 311                 if (mb == NULL) {
 312                         dev_err(enic, "RX mbuf alloc failed queue_id=%u\n",
 313                         (unsigned)rq->index);
 314                         return -ENOMEM;
 315                 }
 316
 317                 dma_addr = (dma_addr_t)(mb->buf_physaddr
 318                            + RTE_PKTMBUF_HEADROOM);
 319                 rq_enet_desc_enc(rqd, dma_addr,
 320                                 (rq->is_sop ? RQ_ENET_TYPE_ONLY_SOP
 321                                 : RQ_ENET_TYPE_NOT_SOP),
 322                                 mb->buf_len - RTE_PKTMBUF_HEADROOM);
 323                 rq->mbuf_ring[i] = mb;
 324         }
 325
 326         /* make sure all prior writes are complete before doing the PIO write */
 327         rte_rmb();
 328
 329         /* Post all but the last buffer to VIC. */
 330         rq->posted_index = rq->ring.desc_count - 1;
 331
 332         rq->rx_nb_hold = 0;
 333
 334         dev_debug(enic, "port=%u, qidx=%u, Write %u posted idx, %u sw held\n",
 335                 enic->port_id, rq->index, rq->posted_index, rq->rx_nb_hold);
 336         iowrite32(rq->posted_index, &rq->ctrl->posted_index);
 337         rte_rmb();
 338
 339         return 0;
 340
 341 }
 342
 343 static void *
 344 enic_alloc_consistent(void *priv, size_t size,
 345         dma_addr_t *dma_handle, u8 *name)
 346 {
 347         void *vaddr;
 348         const struct rte_memzone *rz;
 349         *dma_handle = 0;
 350         struct enic *enic = (struct enic *)priv;
 351         struct enic_memzone_entry *mze;
 352
 353         rz = rte_memzone_reserve_aligned((const char *)name,
 354                                          size, SOCKET_ID_ANY, 0, ENIC_ALIGN);
 355         if (!rz) {
 356                 pr_err("%s : Failed to allocate memory requested for %s\n",
 357                         __func__, name);
 358                 return NULL;
 359         }
 360
 361         vaddr = rz->addr;
 362         *dma_handle = (dma_addr_t)rz->phys_addr;
 363
 364         mze = rte_malloc("enic memzone entry",
 365                          sizeof(struct enic_memzone_entry), 0);
 366
 367         if (!mze) {
 368                 pr_err("%s : Failed to allocate memory for memzone list\n",
 369                        __func__);
 370                 rte_memzone_free(rz);
 371         }
 372
 373         mze->rz = rz;
 374
 375         rte_spinlock_lock(&enic->memzone_list_lock);
 376         LIST_INSERT_HEAD(&enic->memzone_list, mze, entries);
 377         rte_spinlock_unlock(&enic->memzone_list_lock);
 378
 379         return vaddr;
 380 }
 381
 382 static void
 383 enic_free_consistent(void *priv,
 384                      __rte_unused size_t size,
 385                      void *vaddr,
 386                      dma_addr_t dma_handle)
 387 {
 388         struct enic_memzone_entry *mze;
 389         struct enic *enic = (struct enic *)priv;
 390
 391         rte_spinlock_lock(&enic->memzone_list_lock);
 392         LIST_FOREACH(mze, &enic->memzone_list, entries) {
 393                 if (mze->rz->addr == vaddr &&
 394                     mze->rz->phys_addr == dma_handle)
 395                         break;
 396         }
 397         if (mze == NULL) {
 398                 rte_spinlock_unlock(&enic->memzone_list_lock);
 399                 dev_warning(enic,
 400                             "Tried to free memory, but couldn't find it in the memzone list\n");
 401                 return;
 402         }
 403         LIST_REMOVE(mze, entries);
 404         rte_spinlock_unlock(&enic->memzone_list_lock);
 405         rte_memzone_free(mze->rz);
 406         rte_free(mze);
 407 }
 408
 409 static void
 410 enic_intr_handler(__rte_unused struct rte_intr_handle *handle,
 411         void *arg)
 412 {
 413         struct enic *enic = pmd_priv((struct rte_eth_dev *)arg);
 414
 415         vnic_intr_return_all_credits(&enic->intr);
 416
 417         enic_log_q_error(enic);
 418 }
 419
 420 int enic_enable(struct enic *enic)
 421 {
 422         unsigned int index;
 423         int err;
 424         struct rte_eth_dev *eth_dev = enic->rte_dev;
 425
 426         eth_dev->data->dev_link.link_speed = vnic_dev_port_speed(enic->vdev);
 427         eth_dev->data->dev_link.link_duplex = ETH_LINK_FULL_DUPLEX;
 428         vnic_dev_notify_set(enic->vdev, -1); /* No Intr for notify */
 429
 430         if (enic_clsf_init(enic))
 431                 dev_warning(enic, "Init of hash table for clsf failed."\
 432                         "Flow director feature will not work\n");
 433
 434         for (index = 0; index < enic->rq_count; index++) {
 435                 err = enic_alloc_rx_queue_mbufs(enic,
 436                         &enic->rq[enic_sop_rq(index)]);
 437                 if (err) {
 438                         dev_err(enic, "Failed to alloc sop RX queue mbufs\n");
 439                         return err;
 440                 }
 441                 err = enic_alloc_rx_queue_mbufs(enic,
 442                         &enic->rq[enic_data_rq(index)]);
 443                 if (err) {
 444                         /* release the allocated mbufs for the sop rq*/
 445                         enic_rxmbuf_queue_release(enic,
 446                                 &enic->rq[enic_sop_rq(index)]);
 447
 448                         dev_err(enic, "Failed to alloc data RX queue mbufs\n");
 449                         return err;
 450                 }
 451         }
 452
 453         for (index = 0; index < enic->wq_count; index++)
 454                 enic_start_wq(enic, index);
 455         for (index = 0; index < enic->rq_count; index++)
 456                 enic_start_rq(enic, index);
 457
 458         vnic_dev_enable_wait(enic->vdev);
 459
 460         /* Register and enable error interrupt */
 461         rte_intr_callback_register(&(enic->pdev->intr_handle),
 462                 enic_intr_handler, (void *)enic->rte_dev);
 463
 464         rte_intr_enable(&(enic->pdev->intr_handle));
 465         vnic_intr_unmask(&enic->intr);
 466
 467         return 0;
 468 }
 469
 470 int enic_alloc_intr_resources(struct enic *enic)
 471 {
 472         int err;
 473
 474         dev_info(enic, "vNIC resources used:  "\
 475                 "wq %d rq %d cq %d intr %d\n",
 476                 enic->wq_count, enic_vnic_rq_count(enic),
 477                 enic->cq_count, enic->intr_count);
 478
 479         err = vnic_intr_alloc(enic->vdev, &enic->intr, 0);
 480         if (err)
 481                 enic_free_vnic_resources(enic);
 482
 483         return err;
 484 }
 485
 486 void enic_free_rq(void *rxq)
 487 {
 488         struct vnic_rq *rq_sop, *rq_data;
 489         struct enic *enic;
 490
 491         if (rxq == NULL)
 492                 return;
 493
 494         rq_sop = (struct vnic_rq *)rxq;
 495         enic = vnic_dev_priv(rq_sop->vdev);
 496         rq_data = &enic->rq[rq_sop->data_queue_idx];
 497
 498         enic_rxmbuf_queue_release(enic, rq_sop);
 499         if (rq_data->in_use)
 500                 enic_rxmbuf_queue_release(enic, rq_data);
 501
 502         rte_free(rq_sop->mbuf_ring);
 503         if (rq_data->in_use)
 504                 rte_free(rq_data->mbuf_ring);
 505
 506         rq_sop->mbuf_ring = NULL;
 507         rq_data->mbuf_ring = NULL;
 508
 509         vnic_rq_free(rq_sop);
 510         if (rq_data->in_use)
 511                 vnic_rq_free(rq_data);
 512
 513         vnic_cq_free(&enic->cq[rq_sop->index]);
 514 }
 515
 516 void enic_start_wq(struct enic *enic, uint16_t queue_idx)
 517 {
 518         vnic_wq_enable(&enic->wq[queue_idx]);
 519 }
 520
 521 int enic_stop_wq(struct enic *enic, uint16_t queue_idx)
 522 {
 523         return vnic_wq_disable(&enic->wq[queue_idx]);
 524 }
 525
 526 void enic_start_rq(struct enic *enic, uint16_t queue_idx)
 527 {
 528         struct vnic_rq *rq_sop = &enic->rq[enic_sop_rq(queue_idx)];
 529         struct vnic_rq *rq_data = &enic->rq[rq_sop->data_queue_idx];
 530
 531         if (rq_data->in_use)
 532                 vnic_rq_enable(rq_data);
 533         rte_mb();
 534         vnic_rq_enable(rq_sop);
 535
 536 }
 537
 538 int enic_stop_rq(struct enic *enic, uint16_t queue_idx)
 539 {
 540         int ret1 = 0, ret2 = 0;
 541
 542         struct vnic_rq *rq_sop = &enic->rq[enic_sop_rq(queue_idx)];
 543         struct vnic_rq *rq_data = &enic->rq[rq_sop->data_queue_idx];
 544
 545         ret2 = vnic_rq_disable(rq_sop);
 546         rte_mb();
 547         if (rq_data->in_use)
 548                 ret1 = vnic_rq_disable(rq_data);
 549
 550         if (ret2)
 551                 return ret2;
 552         else
 553                 return ret1;
 554 }
 555
 556 int enic_alloc_rq(struct enic *enic, uint16_t queue_idx,
 557         unsigned int socket_id, struct rte_mempool *mp,
 558         uint16_t nb_desc)
 559 {
 560         int rc;
 561         uint16_t sop_queue_idx = enic_sop_rq(queue_idx);
 562         uint16_t data_queue_idx = enic_data_rq(queue_idx);
 563         struct vnic_rq *rq_sop = &enic->rq[sop_queue_idx];
 564         struct vnic_rq *rq_data = &enic->rq[data_queue_idx];
 565         unsigned int mbuf_size, mbufs_per_pkt;
 566         unsigned int nb_sop_desc, nb_data_desc;
 567         uint16_t min_sop, max_sop, min_data, max_data;
 568
 569         rq_sop->is_sop = 1;
 570         rq_sop->data_queue_idx = data_queue_idx;
 571         rq_data->is_sop = 0;
 572         rq_data->data_queue_idx = 0;
 573         rq_sop->socket_id = socket_id;
 574         rq_sop->mp = mp;
 575         rq_data->socket_id = socket_id;
 576         rq_data->mp = mp;
 577         rq_sop->in_use = 1;
 578
 579         mbuf_size = (uint16_t)(rte_pktmbuf_data_room_size(mp) -
 580                                RTE_PKTMBUF_HEADROOM);
 581
 582         if (enic->rte_dev->data->dev_conf.rxmode.enable_scatter) {
 583                 dev_info(enic, "Scatter rx mode enabled\n");
 584                 /* ceil((mtu + ETHER_HDR_LEN + 4)/mbuf_size) */
 585                 mbufs_per_pkt = ((enic->config.mtu + ETHER_HDR_LEN + 4) +
 586                                  (mbuf_size - 1)) / mbuf_size;
 587         } else {
 588                 dev_info(enic, "Scatter rx mode disabled\n");
 589                 mbufs_per_pkt = 1;
 590         }
 591
 592         if (mbufs_per_pkt > 1) {
 593                 dev_info(enic, "Scatter rx mode in use\n");
 594                 rq_data->in_use = 1;
 595         } else {
 596                 dev_info(enic, "Scatter rx mode not being used\n");
 597                 rq_data->in_use = 0;
 598         }
 599
 600         /* number of descriptors have to be a multiple of 32 */
 601         nb_sop_desc = (nb_desc / mbufs_per_pkt) & ~0x1F;
 602         nb_data_desc = (nb_desc - nb_sop_desc) & ~0x1F;
 603
 604         rq_sop->max_mbufs_per_pkt = mbufs_per_pkt;
 605         rq_data->max_mbufs_per_pkt = mbufs_per_pkt;
 606
 607         if (mbufs_per_pkt > 1) {
 608                 min_sop = 64;
 609                 max_sop = ((enic->config.rq_desc_count /
 610                             (mbufs_per_pkt - 1)) & ~0x1F);
 611                 min_data = min_sop * (mbufs_per_pkt - 1);
 612                 max_data = enic->config.rq_desc_count;
 613         } else {
 614                 min_sop = 64;
 615                 max_sop = enic->config.rq_desc_count;
 616                 min_data = 0;
 617                 max_data = 0;
 618         }
 619
 620         if (nb_desc < (min_sop + min_data)) {
 621                 dev_warning(enic,
 622                             "Number of rx descs too low, adjusting to minimum\n");
 623                 nb_sop_desc = min_sop;
 624                 nb_data_desc = min_data;
 625         } else if (nb_desc > (max_sop + max_data)) {
 626                 dev_warning(enic,
 627                             "Number of rx_descs too high, adjusting to maximum\n");
 628                 nb_sop_desc = max_sop;
 629                 nb_data_desc = max_data;
 630         }
 631         if (mbufs_per_pkt > 1) {
 632                 dev_info(enic, "For mtu %d and mbuf size %d valid rx descriptor range is %d to %d\n",
 633                          enic->config.mtu, mbuf_size, min_sop + min_data,
 634                          max_sop + max_data);
 635         }
 636         dev_info(enic, "Using %d rx descriptors (sop %d, data %d)\n",
 637                  nb_sop_desc + nb_data_desc, nb_sop_desc, nb_data_desc);
 638
 639         /* Allocate sop queue resources */
 640         rc = vnic_rq_alloc(enic->vdev, rq_sop, sop_queue_idx,
 641                 nb_sop_desc, sizeof(struct rq_enet_desc));
 642         if (rc) {
 643                 dev_err(enic, "error in allocation of sop rq\n");
 644                 goto err_exit;
 645         }
 646         nb_sop_desc = rq_sop->ring.desc_count;
 647
 648         if (rq_data->in_use) {
 649                 /* Allocate data queue resources */
 650                 rc = vnic_rq_alloc(enic->vdev, rq_data, data_queue_idx,
 651                                    nb_data_desc,
 652                                    sizeof(struct rq_enet_desc));
 653                 if (rc) {
 654                         dev_err(enic, "error in allocation of data rq\n");
 655                         goto err_free_rq_sop;
 656                 }
 657                 nb_data_desc = rq_data->ring.desc_count;
 658         }
 659         rc = vnic_cq_alloc(enic->vdev, &enic->cq[queue_idx], queue_idx,
 660                            socket_id, nb_sop_desc + nb_data_desc,
 661                            sizeof(struct cq_enet_rq_desc));
 662         if (rc) {
 663                 dev_err(enic, "error in allocation of cq for rq\n");
 664                 goto err_free_rq_data;
 665         }
 666
 667         /* Allocate the mbuf rings */
 668         rq_sop->mbuf_ring = (struct rte_mbuf **)
 669                 rte_zmalloc_socket("rq->mbuf_ring",
 670                                    sizeof(struct rte_mbuf *) * nb_sop_desc,
 671                                    RTE_CACHE_LINE_SIZE, rq_sop->socket_id);
 672         if (rq_sop->mbuf_ring == NULL)
 673                 goto err_free_cq;
 674
 675         if (rq_data->in_use) {
 676                 rq_data->mbuf_ring = (struct rte_mbuf **)
 677                         rte_zmalloc_socket("rq->mbuf_ring",
 678                                 sizeof(struct rte_mbuf *) * nb_data_desc,
 679                                 RTE_CACHE_LINE_SIZE, rq_sop->socket_id);
 680                 if (rq_data->mbuf_ring == NULL)
 681                         goto err_free_sop_mbuf;
 682         }
 683
 684         return 0;
 685
 686 err_free_sop_mbuf:
 687         rte_free(rq_sop->mbuf_ring);
 688 err_free_cq:
 689         /* cleanup on error */
 690         vnic_cq_free(&enic->cq[queue_idx]);
 691 err_free_rq_data:
 692         if (rq_data->in_use)
 693                 vnic_rq_free(rq_data);
 694 err_free_rq_sop:
 695         vnic_rq_free(rq_sop);
 696 err_exit:
 697         return -ENOMEM;
 698 }
 699
 700 void enic_free_wq(void *txq)
 701 {
 702         struct vnic_wq *wq;
 703         struct enic *enic;
 704
 705         if (txq == NULL)
 706                 return;
 707
 708         wq = (struct vnic_wq *)txq;
 709         enic = vnic_dev_priv(wq->vdev);
 710         rte_memzone_free(wq->cqmsg_rz);
 711         vnic_wq_free(wq);
 712         vnic_cq_free(&enic->cq[enic->rq_count + wq->index]);
 713 }
 714
 715 int enic_alloc_wq(struct enic *enic, uint16_t queue_idx,
 716         unsigned int socket_id, uint16_t nb_desc)
 717 {
 718         int err;
 719         struct vnic_wq *wq = &enic->wq[queue_idx];
 720         unsigned int cq_index = enic_cq_wq(enic, queue_idx);
 721         char name[NAME_MAX];
 722         static int instance;
 723
 724         wq->socket_id = socket_id;
 725         if (nb_desc) {
 726                 if (nb_desc > enic->config.wq_desc_count) {
 727                         dev_warning(enic,
 728                                 "WQ %d - number of tx desc in cmd line (%d)"\
 729                                 "is greater than that in the UCSM/CIMC adapter"\
 730                                 "policy.  Applying the value in the adapter "\
 731                                 "policy (%d)\n",
 732                                 queue_idx, nb_desc, enic->config.wq_desc_count);
 733                 } else if (nb_desc != enic->config.wq_desc_count) {
 734                         enic->config.wq_desc_count = nb_desc;
 735                         dev_info(enic,
 736                                 "TX Queues - effective number of descs:%d\n",
 737                                 nb_desc);
 738                 }
 739         }
 740
 741         /* Allocate queue resources */
 742         err = vnic_wq_alloc(enic->vdev, &enic->wq[queue_idx], queue_idx,
 743                 enic->config.wq_desc_count,
 744                 sizeof(struct wq_enet_desc));
 745         if (err) {
 746                 dev_err(enic, "error in allocation of wq\n");
 747                 return err;
 748         }
 749
 750         err = vnic_cq_alloc(enic->vdev, &enic->cq[cq_index], cq_index,
 751                 socket_id, enic->config.wq_desc_count,
 752                 sizeof(struct cq_enet_wq_desc));
 753         if (err) {
 754                 vnic_wq_free(wq);
 755                 dev_err(enic, "error in allocation of cq for wq\n");
 756         }
 757
 758         /* setup up CQ message */
 759         snprintf((char *)name, sizeof(name),
 760                  "vnic_cqmsg-%s-%d-%d", enic->bdf_name, queue_idx,
 761                 instance++);
 762
 763         wq->cqmsg_rz = rte_memzone_reserve_aligned((const char *)name,
 764                                                    sizeof(uint32_t),
 765                                                    SOCKET_ID_ANY, 0,
 766                                                    ENIC_ALIGN);
 767         if (!wq->cqmsg_rz)
 768                 return -ENOMEM;
 769
 770         return err;
 771 }
 772
 773 int enic_disable(struct enic *enic)
 774 {
 775         unsigned int i;
 776         int err;
 777
 778         vnic_intr_mask(&enic->intr);
 779         (void)vnic_intr_masked(&enic->intr); /* flush write */
 780
 781         vnic_dev_disable(enic->vdev);
 782
 783         enic_clsf_destroy(enic);
 784
 785         if (!enic_is_sriov_vf(enic))
 786                 vnic_dev_del_addr(enic->vdev, enic->mac_addr);
 787
 788         for (i = 0; i < enic->wq_count; i++) {
 789                 err = vnic_wq_disable(&enic->wq[i]);
 790                 if (err)
 791                         return err;
 792         }
 793         for (i = 0; i < enic_vnic_rq_count(enic); i++) {
 794                 if (enic->rq[i].in_use) {
 795                         err = vnic_rq_disable(&enic->rq[i]);
 796                         if (err)
 797                                 return err;
 798                 }
 799         }
 800
 801         vnic_dev_set_reset_flag(enic->vdev, 1);
 802         vnic_dev_notify_unset(enic->vdev);
 803
 804         for (i = 0; i < enic->wq_count; i++)
 805                 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
 806
 807         for (i = 0; i < enic_vnic_rq_count(enic); i++)
 808                 if (enic->rq[i].in_use)
 809                         vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
 810         for (i = 0; i < enic->cq_count; i++)
 811                 vnic_cq_clean(&enic->cq[i]);
 812         vnic_intr_clean(&enic->intr);
 813
 814         return 0;
 815 }
 816
 817 static int enic_dev_wait(struct vnic_dev *vdev,
 818         int (*start)(struct vnic_dev *, int),
 819         int (*finished)(struct vnic_dev *, int *),
 820         int arg)
 821 {
 822         int done;
 823         int err;
 824         int i;
 825
 826         err = start(vdev, arg);
 827         if (err)
 828                 return err;
 829
 830         /* Wait for func to complete...2 seconds max */
 831         for (i = 0; i < 2000; i++) {
 832                 err = finished(vdev, &done);
 833                 if (err)
 834                         return err;
 835                 if (done)
 836                         return 0;
 837                 usleep(1000);
 838         }
 839         return -ETIMEDOUT;
 840 }
 841
 842 static int enic_dev_open(struct enic *enic)
 843 {
 844         int err;
 845
 846         err = enic_dev_wait(enic->vdev, vnic_dev_open,
 847                 vnic_dev_open_done, 0);
 848         if (err)
 849                 dev_err(enic_get_dev(enic),
 850                         "vNIC device open failed, err %d\n", err);
 851
 852         return err;
 853 }
 854
 855 static int enic_set_rsskey(struct enic *enic)
 856 {
 857         dma_addr_t rss_key_buf_pa;
 858         union vnic_rss_key *rss_key_buf_va = NULL;
 859         static union vnic_rss_key rss_key = {
 860                 .key = {
 861                         [0] = {.b = {85, 67, 83, 97, 119, 101, 115, 111, 109, 101}},
 862                         [1] = {.b = {80, 65, 76, 79, 117, 110, 105, 113, 117, 101}},
 863                         [2] = {.b = {76, 73, 78, 85, 88, 114, 111, 99, 107, 115}},
 864                         [3] = {.b = {69, 78, 73, 67, 105, 115, 99, 111, 111, 108}},
 865                 }
 866         };
 867         int err;
 868         u8 name[NAME_MAX];
 869
 870         snprintf((char *)name, NAME_MAX, "rss_key-%s", enic->bdf_name);
 871         rss_key_buf_va = enic_alloc_consistent(enic, sizeof(union vnic_rss_key),
 872                 &rss_key_buf_pa, name);
 873         if (!rss_key_buf_va)
 874                 return -ENOMEM;
 875
 876         rte_memcpy(rss_key_buf_va, &rss_key, sizeof(union vnic_rss_key));
 877
 878         err = enic_set_rss_key(enic,
 879                 rss_key_buf_pa,
 880                 sizeof(union vnic_rss_key));
 881
 882         enic_free_consistent(enic, sizeof(union vnic_rss_key),
 883                 rss_key_buf_va, rss_key_buf_pa);
 884
 885         return err;
 886 }
 887
 888 static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits)
 889 {
 890         dma_addr_t rss_cpu_buf_pa;
 891         union vnic_rss_cpu *rss_cpu_buf_va = NULL;
 892         int i;
 893         int err;
 894         u8 name[NAME_MAX];
 895
 896         snprintf((char *)name, NAME_MAX, "rss_cpu-%s", enic->bdf_name);
 897         rss_cpu_buf_va = enic_alloc_consistent(enic, sizeof(union vnic_rss_cpu),
 898                 &rss_cpu_buf_pa, name);
 899         if (!rss_cpu_buf_va)
 900                 return -ENOMEM;
 901
 902         for (i = 0; i < (1 << rss_hash_bits); i++)
 903                 (*rss_cpu_buf_va).cpu[i / 4].b[i % 4] =
 904                         enic_sop_rq(i % enic->rq_count);
 905
 906         err = enic_set_rss_cpu(enic,
 907                 rss_cpu_buf_pa,
 908                 sizeof(union vnic_rss_cpu));
 909
 910         enic_free_consistent(enic, sizeof(union vnic_rss_cpu),
 911                 rss_cpu_buf_va, rss_cpu_buf_pa);
 912
 913         return err;
 914 }
 915
 916 static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu,
 917         u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable)
 918 {
 919         const u8 tso_ipid_split_en = 0;
 920         int err;
 921
 922         /* Enable VLAN tag stripping */
 923
 924         err = enic_set_nic_cfg(enic,
 925                 rss_default_cpu, rss_hash_type,
 926                 rss_hash_bits, rss_base_cpu,
 927                 rss_enable, tso_ipid_split_en,
 928                 enic->ig_vlan_strip_en);
 929
 930         return err;
 931 }
 932
 933 int enic_set_rss_nic_cfg(struct enic *enic)
 934 {
 935         const u8 rss_default_cpu = 0;
 936         const u8 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 |
 937             NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 |
 938             NIC_CFG_RSS_HASH_TYPE_IPV6 |
 939             NIC_CFG_RSS_HASH_TYPE_TCP_IPV6;
 940         const u8 rss_hash_bits = 7;
 941         const u8 rss_base_cpu = 0;
 942         u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1);
 943
 944         if (rss_enable) {
 945                 if (!enic_set_rsskey(enic)) {
 946                         if (enic_set_rsscpu(enic, rss_hash_bits)) {
 947                                 rss_enable = 0;
 948                                 dev_warning(enic, "RSS disabled, "\
 949                                         "Failed to set RSS cpu indirection table.");
 950                         }
 951                 } else {
 952                         rss_enable = 0;
 953                         dev_warning(enic,
 954                                 "RSS disabled, Failed to set RSS key.\n");
 955                 }
 956         }
 957
 958         return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type,
 959                 rss_hash_bits, rss_base_cpu, rss_enable);
 960 }
 961
 962 int enic_setup_finish(struct enic *enic)
 963 {
 964         int ret;
 965
 966         enic_init_soft_stats(enic);
 967
 968         ret = enic_set_rss_nic_cfg(enic);
 969         if (ret) {
 970                 dev_err(enic, "Failed to config nic, aborting.\n");
 971                 return -1;
 972         }
 973
 974         vnic_dev_add_addr(enic->vdev, enic->mac_addr);
 975
 976         /* Default conf */
 977         vnic_dev_packet_filter(enic->vdev,
 978                 1 /* directed  */,
 979                 1 /* multicast */,
 980                 1 /* broadcast */,
 981                 0 /* promisc   */,
 982                 1 /* allmulti  */);
 983
 984         enic->promisc = 0;
 985         enic->allmulti = 1;
 986
 987         return 0;
 988 }
 989
 990 void enic_add_packet_filter(struct enic *enic)
 991 {
 992         /* Args -> directed, multicast, broadcast, promisc, allmulti */
 993         vnic_dev_packet_filter(enic->vdev, 1, 1, 1,
 994                 enic->promisc, enic->allmulti);
 995 }
 996
 997 int enic_get_link_status(struct enic *enic)
 998 {
 999         return vnic_dev_link_status(enic->vdev);
1000 }
1001
1002 static void enic_dev_deinit(struct enic *enic)
1003 {
1004         struct rte_eth_dev *eth_dev = enic->rte_dev;
1005
1006         rte_free(eth_dev->data->mac_addrs);
1007 }
1008
1009
1010 int enic_set_vnic_res(struct enic *enic)
1011 {
1012         struct rte_eth_dev *eth_dev = enic->rte_dev;
1013         int rc = 0;
1014
1015         /* With Rx scatter support, two RQs are now used per RQ used by
1016          * the application.
1017          */
1018         if (enic->rq_count < (eth_dev->data->nb_rx_queues * 2)) {
1019                 dev_err(dev, "Not enough Receive queues. Requested:%u which uses %d RQs on VIC, Configured:%u\n",
1020                         eth_dev->data->nb_rx_queues,
1021                         eth_dev->data->nb_rx_queues * 2, enic->rq_count);
1022                 rc = -EINVAL;
1023         }
1024         if (enic->wq_count < eth_dev->data->nb_tx_queues) {
1025                 dev_err(dev, "Not enough Transmit queues. Requested:%u, Configured:%u\n",
1026                         eth_dev->data->nb_tx_queues, enic->wq_count);
1027                 rc = -EINVAL;
1028         }
1029
1030         if (enic->cq_count < (enic->rq_count + enic->wq_count)) {
1031                 dev_err(dev, "Not enough Completion queues. Required:%u, Configured:%u\n",
1032                         enic->rq_count + enic->wq_count, enic->cq_count);
1033                 rc = -EINVAL;
1034         }
1035
1036         if (rc == 0) {
1037                 enic->rq_count = eth_dev->data->nb_rx_queues;
1038                 enic->wq_count = eth_dev->data->nb_tx_queues;
1039                 enic->cq_count = enic->rq_count + enic->wq_count;
1040         }
1041
1042         return rc;
1043 }
1044
1045 /* The Cisco NIC can send and receive packets up to a max packet size
1046  * determined by the NIC type and firmware. There is also an MTU
1047  * configured into the NIC via the CIMC/UCSM management interface
1048  * which can be overridden by this function (up to the max packet size).
1049  * Depending on the network setup, doing so may cause packet drops
1050  * and unexpected behavior.
1051  */
1052 int enic_set_mtu(struct enic *enic, uint16_t new_mtu)
1053 {
1054         uint16_t old_mtu;       /* previous setting */
1055         uint16_t config_mtu;    /* Value configured into NIC via CIMC/UCSM */
1056         struct rte_eth_dev *eth_dev = enic->rte_dev;
1057
1058         old_mtu = eth_dev->data->mtu;
1059         config_mtu = enic->config.mtu;
1060
1061         /* only works with Rx scatter disabled */
1062         if (enic->rte_dev->data->dev_conf.rxmode.enable_scatter)
1063                 return -ENOTSUP;
1064
1065         if (new_mtu > enic->max_mtu) {
1066                 dev_err(enic,
1067                         "MTU not updated: requested (%u) greater than max (%u)\n",
1068                         new_mtu, enic->max_mtu);
1069                 return -EINVAL;
1070         }
1071         if (new_mtu < ENIC_MIN_MTU) {
1072                 dev_info(enic,
1073                         "MTU not updated: requested (%u) less than min (%u)\n",
1074                         new_mtu, ENIC_MIN_MTU);
1075                 return -EINVAL;
1076         }
1077         if (new_mtu > config_mtu)
1078                 dev_warning(enic,
1079                         "MTU (%u) is greater than value configured in NIC (%u)\n",
1080                         new_mtu, config_mtu);
1081
1082         /* update the mtu */
1083         eth_dev->data->mtu = new_mtu;
1084
1085         dev_info(enic, "MTU changed from %u to %u\n",  old_mtu, new_mtu);
1086         return 0;
1087 }
1088
1089 static int enic_dev_init(struct enic *enic)
1090 {
1091         int err;
1092         struct rte_eth_dev *eth_dev = enic->rte_dev;
1093
1094         vnic_dev_intr_coal_timer_info_default(enic->vdev);
1095
1096         /* Get vNIC configuration
1097         */
1098         err = enic_get_vnic_config(enic);
1099         if (err) {
1100                 dev_err(dev, "Get vNIC configuration failed, aborting\n");
1101                 return err;
1102         }
1103
1104         eth_dev->data->mac_addrs = rte_zmalloc("enic_mac_addr", ETH_ALEN, 0);
1105         if (!eth_dev->data->mac_addrs) {
1106                 dev_err(enic, "mac addr storage alloc failed, aborting.\n");
1107                 return -1;
1108         }
1109         ether_addr_copy((struct ether_addr *) enic->mac_addr,
1110                 &eth_dev->data->mac_addrs[0]);
1111
1112
1113         /* Get available resource counts
1114         */
1115         enic_get_res_counts(enic);
1116
1117         vnic_dev_set_reset_flag(enic->vdev, 0);
1118
1119         return 0;
1120
1121 }
1122
1123 int enic_probe(struct enic *enic)
1124 {
1125         struct rte_pci_device *pdev = enic->pdev;
1126         int err = -1;
1127
1128         dev_debug(enic, " Initializing ENIC PMD version %s\n", DRV_VERSION);
1129
1130         enic->bar0.vaddr = (void *)pdev->mem_resource[0].addr;
1131         enic->bar0.len = pdev->mem_resource[0].len;
1132
1133         /* Register vNIC device */
1134         enic->vdev = vnic_dev_register(NULL, enic, enic->pdev, &enic->bar0, 1);
1135         if (!enic->vdev) {
1136                 dev_err(enic, "vNIC registration failed, aborting\n");
1137                 goto err_out;
1138         }
1139
1140         LIST_INIT(&enic->memzone_list);
1141         rte_spinlock_init(&enic->memzone_list_lock);
1142
1143         vnic_register_cbacks(enic->vdev,
1144                 enic_alloc_consistent,
1145                 enic_free_consistent);
1146
1147         /* Issue device open to get device in known state */
1148         err = enic_dev_open(enic);
1149         if (err) {
1150                 dev_err(enic, "vNIC dev open failed, aborting\n");
1151                 goto err_out_unregister;
1152         }
1153
1154         /* Set ingress vlan rewrite mode before vnic initialization */
1155         err = vnic_dev_set_ig_vlan_rewrite_mode(enic->vdev,
1156                 IG_VLAN_REWRITE_MODE_PASS_THRU);
1157         if (err) {
1158                 dev_err(enic,
1159                         "Failed to set ingress vlan rewrite mode, aborting.\n");
1160                 goto err_out_dev_close;
1161         }
1162
1163         /* Issue device init to initialize the vnic-to-switch link.
1164          * We'll start with carrier off and wait for link UP
1165          * notification later to turn on carrier.  We don't need
1166          * to wait here for the vnic-to-switch link initialization
1167          * to complete; link UP notification is the indication that
1168          * the process is complete.
1169          */
1170
1171         err = vnic_dev_init(enic->vdev, 0);
1172         if (err) {
1173                 dev_err(enic, "vNIC dev init failed, aborting\n");
1174                 goto err_out_dev_close;
1175         }
1176
1177         err = enic_dev_init(enic);
1178         if (err) {
1179                 dev_err(enic, "Device initialization failed, aborting\n");
1180                 goto err_out_dev_close;
1181         }
1182
1183         return 0;
1184
1185 err_out_dev_close:
1186         vnic_dev_close(enic->vdev);
1187 err_out_unregister:
1188         vnic_dev_unregister(enic->vdev);
1189 err_out:
1190         return err;
1191 }
1192
1193 void enic_remove(struct enic *enic)
1194 {
1195         enic_dev_deinit(enic);
1196         vnic_dev_close(enic->vdev);
1197         vnic_dev_unregister(enic->vdev);
1198 }