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