drivers/net/enic/enic_main.c

   1 /*
   2  * Copyright 2008-2014 Cisco Systems, Inc.  All rights reserved.
   3  * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
   4  *
   5  * Copyright (c) 2014, Cisco Systems, Inc.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  * notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  * notice, this list of conditions and the following disclaimer in
  17  * the documentation and/or other materials provided with the
  18  * distribution.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  23  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  24  * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  26  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  27  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  28  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  30  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  31  * POSSIBILITY OF SUCH DAMAGE.
  32  *
  33  */
  34
  35 #include <stdio.h>
  36
  37 #include <sys/stat.h>
  38 #include <sys/mman.h>
  39 #include <fcntl.h>
  40 #include <libgen.h>
  41
  42 #include <rte_pci.h>
  43 #include <rte_memzone.h>
  44 #include <rte_malloc.h>
  45 #include <rte_mbuf.h>
  46 #include <rte_string_fns.h>
  47 #include <rte_ethdev.h>
  48
  49 #include "enic_compat.h"
  50 #include "enic.h"
  51 #include "wq_enet_desc.h"
  52 #include "rq_enet_desc.h"
  53 #include "cq_enet_desc.h"
  54 #include "vnic_enet.h"
  55 #include "vnic_dev.h"
  56 #include "vnic_wq.h"
  57 #include "vnic_rq.h"
  58 #include "vnic_cq.h"
  59 #include "vnic_intr.h"
  60 #include "vnic_nic.h"
  61
  62 static inline int enic_is_sriov_vf(struct enic *enic)
  63 {
  64         return enic->pdev->id.device_id == PCI_DEVICE_ID_CISCO_VIC_ENET_VF;
  65 }
  66
  67 static int is_zero_addr(uint8_t *addr)
  68 {
  69         return !(addr[0] |  addr[1] | addr[2] | addr[3] | addr[4] | addr[5]);
  70 }
  71
  72 static int is_mcast_addr(uint8_t *addr)
  73 {
  74         return addr[0] & 1;
  75 }
  76
  77 static int is_eth_addr_valid(uint8_t *addr)
  78 {
  79         return !is_mcast_addr(addr) && !is_zero_addr(addr);
  80 }
  81
  82 static void
  83 enic_rxmbuf_queue_release(__rte_unused struct enic *enic, struct vnic_rq *rq)
  84 {
  85         uint16_t i;
  86
  87         if (!rq || !rq->mbuf_ring) {
  88                 dev_debug(enic, "Pointer to rq or mbuf_ring is NULL");
  89                 return;
  90         }
  91
  92         for (i = 0; i < rq->ring.desc_count; i++) {
  93                 if (rq->mbuf_ring[i]) {
  94                         rte_pktmbuf_free_seg(rq->mbuf_ring[i]);
  95                         rq->mbuf_ring[i] = NULL;
  96                 }
  97         }
  98 }
  99
 100 void enic_set_hdr_split_size(struct enic *enic, u16 split_hdr_size)
 101 {
 102         vnic_set_hdr_split_size(enic->vdev, split_hdr_size);
 103 }
 104
 105 static void enic_free_wq_buf(struct vnic_wq_buf *buf)
 106 {
 107         struct rte_mbuf *mbuf = (struct rte_mbuf *)buf->mb;
 108
 109         rte_pktmbuf_free_seg(mbuf);
 110         buf->mb = NULL;
 111 }
 112
 113 static void enic_log_q_error(struct enic *enic)
 114 {
 115         unsigned int i;
 116         u32 error_status;
 117
 118         for (i = 0; i < enic->wq_count; i++) {
 119                 error_status = vnic_wq_error_status(&enic->wq[i]);
 120                 if (error_status)
 121                         dev_err(enic, "WQ[%d] error_status %d\n", i,
 122                                 error_status);
 123         }
 124
 125         for (i = 0; i < enic_vnic_rq_count(enic); i++) {
 126                 if (!enic->rq[i].in_use)
 127                         continue;
 128                 error_status = vnic_rq_error_status(&enic->rq[i]);
 129                 if (error_status)
 130                         dev_err(enic, "RQ[%d] error_status %d\n", i,
 131                                 error_status);
 132         }
 133 }
 134
 135 static void enic_clear_soft_stats(struct enic *enic)
 136 {
 137         struct enic_soft_stats *soft_stats = &enic->soft_stats;
 138         rte_atomic64_clear(&soft_stats->rx_nombuf);
 139         rte_atomic64_clear(&soft_stats->rx_packet_errors);
 140 }
 141
 142 static void enic_init_soft_stats(struct enic *enic)
 143 {
 144         struct enic_soft_stats *soft_stats = &enic->soft_stats;
 145         rte_atomic64_init(&soft_stats->rx_nombuf);
 146         rte_atomic64_init(&soft_stats->rx_packet_errors);
 147         enic_clear_soft_stats(enic);
 148 }
 149
 150 void enic_dev_stats_clear(struct enic *enic)
 151 {
 152         if (vnic_dev_stats_clear(enic->vdev))
 153                 dev_err(enic, "Error in clearing stats\n");
 154         enic_clear_soft_stats(enic);
 155 }
 156
 157 void enic_dev_stats_get(struct enic *enic, struct rte_eth_stats *r_stats)
 158 {
 159         struct vnic_stats *stats;
 160         struct enic_soft_stats *soft_stats = &enic->soft_stats;
 161         int64_t rx_truncated;
 162         uint64_t rx_packet_errors;
 163
 164         if (vnic_dev_stats_dump(enic->vdev, &stats)) {
 165                 dev_err(enic, "Error in getting stats\n");
 166                 return;
 167         }
 168
 169         /* The number of truncated packets can only be calculated by
 170          * subtracting a hardware counter from error packets received by
 171          * the driver. Note: this causes transient inaccuracies in the
 172          * ipackets count. Also, the length of truncated packets are
 173          * counted in ibytes even though truncated packets are dropped
 174          * which can make ibytes be slightly higher than it should be.
 175          */
 176         rx_packet_errors = rte_atomic64_read(&soft_stats->rx_packet_errors);
 177         rx_truncated = rx_packet_errors - stats->rx.rx_errors -
 178                 stats->rx.rx_no_bufs;
 179
 180         r_stats->ipackets = stats->rx.rx_frames_ok - rx_truncated;
 181         r_stats->opackets = stats->tx.tx_frames_ok;
 182
 183         r_stats->ibytes = stats->rx.rx_bytes_ok;
 184         r_stats->obytes = stats->tx.tx_bytes_ok;
 185
 186         r_stats->ierrors = stats->rx.rx_errors + stats->rx.rx_drop;
 187         r_stats->oerrors = stats->tx.tx_errors;
 188
 189         r_stats->imissed = stats->rx.rx_no_bufs + rx_truncated;
 190
 191         r_stats->rx_nombuf = rte_atomic64_read(&soft_stats->rx_nombuf);
 192 }
 193
 194 void enic_del_mac_address(struct enic *enic)
 195 {
 196         if (vnic_dev_del_addr(enic->vdev, enic->mac_addr))
 197                 dev_err(enic, "del mac addr failed\n");
 198 }
 199
 200 void enic_set_mac_address(struct enic *enic, uint8_t *mac_addr)
 201 {
 202         int err;
 203
 204         if (!is_eth_addr_valid(mac_addr)) {
 205                 dev_err(enic, "invalid mac address\n");
 206                 return;
 207         }
 208
 209         err = vnic_dev_del_addr(enic->vdev, enic->mac_addr);
 210         if (err) {
 211                 dev_err(enic, "del mac addr failed\n");
 212                 return;
 213         }
 214
 215         ether_addr_copy((struct ether_addr *)mac_addr,
 216                 (struct ether_addr *)enic->mac_addr);
 217
 218         err = vnic_dev_add_addr(enic->vdev, mac_addr);
 219         if (err) {
 220                 dev_err(enic, "add mac addr failed\n");
 221                 return;
 222         }
 223 }
 224
 225 static void
 226 enic_free_rq_buf(struct rte_mbuf **mbuf)
 227 {
 228         if (*mbuf == NULL)
 229                 return;
 230
 231         rte_pktmbuf_free(*mbuf);
 232         mbuf = NULL;
 233 }
 234
 235 void enic_init_vnic_resources(struct enic *enic)
 236 {
 237         unsigned int error_interrupt_enable = 1;
 238         unsigned int error_interrupt_offset = 0;
 239         unsigned int index = 0;
 240         unsigned int cq_idx;
 241         struct vnic_rq *data_rq;
 242
 243         for (index = 0; index < enic->rq_count; index++) {
 244                 cq_idx = enic_cq_rq(enic, enic_sop_rq(index));
 245
 246                 vnic_rq_init(&enic->rq[enic_sop_rq(index)],
 247                         cq_idx,
 248                         error_interrupt_enable,
 249                         error_interrupt_offset);
 250
 251                 data_rq = &enic->rq[enic_data_rq(index)];
 252                 if (data_rq->in_use)
 253                         vnic_rq_init(data_rq,
 254                                      cq_idx,
 255                                      error_interrupt_enable,
 256                                      error_interrupt_offset);
 257
 258                 vnic_cq_init(&enic->cq[cq_idx],
 259                         0 /* flow_control_enable */,
 260                         1 /* color_enable */,
 261                         0 /* cq_head */,
 262                         0 /* cq_tail */,
 263                         1 /* cq_tail_color */,
 264                         0 /* interrupt_enable */,
 265                         1 /* cq_entry_enable */,
 266                         0 /* cq_message_enable */,
 267                         0 /* interrupt offset */,
 268                         0 /* cq_message_addr */);
 269         }
 270
 271         for (index = 0; index < enic->wq_count; index++) {
 272                 vnic_wq_init(&enic->wq[index],
 273                         enic_cq_wq(enic, index),
 274                         error_interrupt_enable,
 275                         error_interrupt_offset);
 276
 277                 cq_idx = enic_cq_wq(enic, index);
 278                 vnic_cq_init(&enic->cq[cq_idx],
 279                         0 /* flow_control_enable */,
 280                         1 /* color_enable */,
 281                         0 /* cq_head */,
 282                         0 /* cq_tail */,
 283                         1 /* cq_tail_color */,
 284                         0 /* interrupt_enable */,
 285                         0 /* cq_entry_enable */,
 286                         1 /* cq_message_enable */,
 287                         0 /* interrupt offset */,
 288                         (u64)enic->wq[index].cqmsg_rz->phys_addr);
 289         }
 290
 291         vnic_intr_init(&enic->intr,
 292                 enic->config.intr_timer_usec,
 293                 enic->config.intr_timer_type,
 294                 /*mask_on_assertion*/1);
 295 }
 296
 297
 298 static int
 299 enic_alloc_rx_queue_mbufs(struct enic *enic, struct vnic_rq *rq)
 300 {
 301         struct rte_mbuf *mb;
 302         struct rq_enet_desc *rqd = rq->ring.descs;
 303         unsigned i;
 304         dma_addr_t dma_addr;
 305
 306         if (!rq->in_use)
 307                 return 0;
 308
 309         dev_debug(enic, "queue %u, allocating %u rx queue mbufs\n", rq->index,
 310                   rq->ring.desc_count);
 311
 312         for (i = 0; i < rq->ring.desc_count; i++, rqd++) {
 313                 mb = rte_mbuf_raw_alloc(rq->mp);
 314                 if (mb == NULL) {
 315                         dev_err(enic, "RX mbuf alloc failed queue_id=%u\n",
 316                         (unsigned)rq->index);
 317                         return -ENOMEM;
 318                 }
 319
 320                 mb->data_off = RTE_PKTMBUF_HEADROOM;
 321                 dma_addr = (dma_addr_t)(mb->buf_physaddr
 322                            + RTE_PKTMBUF_HEADROOM);
 323                 rq_enet_desc_enc(rqd, dma_addr,
 324                                 (rq->is_sop ? RQ_ENET_TYPE_ONLY_SOP
 325                                 : RQ_ENET_TYPE_NOT_SOP),
 326                                 mb->buf_len - RTE_PKTMBUF_HEADROOM);
 327                 rq->mbuf_ring[i] = mb;
 328         }
 329
 330         /* make sure all prior writes are complete before doing the PIO write */
 331         rte_rmb();
 332
 333         /* Post all but the last buffer to VIC. */
 334         rq->posted_index = rq->ring.desc_count - 1;
 335
 336         rq->rx_nb_hold = 0;
 337
 338         dev_debug(enic, "port=%u, qidx=%u, Write %u posted idx, %u sw held\n",
 339                 enic->port_id, rq->index, rq->posted_index, rq->rx_nb_hold);
 340         iowrite32(rq->posted_index, &rq->ctrl->posted_index);
 341         iowrite32(0, &rq->ctrl->fetch_index);
 342         rte_rmb();
 343
 344         return 0;
 345
 346 }
 347
 348 static void *
 349 enic_alloc_consistent(void *priv, size_t size,
 350         dma_addr_t *dma_handle, u8 *name)
 351 {
 352         void *vaddr;
 353         const struct rte_memzone *rz;
 354         *dma_handle = 0;
 355         struct enic *enic = (struct enic *)priv;
 356         struct enic_memzone_entry *mze;
 357
 358         rz = rte_memzone_reserve_aligned((const char *)name,
 359                                          size, SOCKET_ID_ANY, 0, ENIC_ALIGN);
 360         if (!rz) {
 361                 pr_err("%s : Failed to allocate memory requested for %s\n",
 362                         __func__, name);
 363                 return NULL;
 364         }
 365
 366         vaddr = rz->addr;
 367         *dma_handle = (dma_addr_t)rz->phys_addr;
 368
 369         mze = rte_malloc("enic memzone entry",
 370                          sizeof(struct enic_memzone_entry), 0);
 371
 372         if (!mze) {
 373                 pr_err("%s : Failed to allocate memory for memzone list\n",
 374                        __func__);
 375                 rte_memzone_free(rz);
 376         }
 377
 378         mze->rz = rz;
 379
 380         rte_spinlock_lock(&enic->memzone_list_lock);
 381         LIST_INSERT_HEAD(&enic->memzone_list, mze, entries);
 382         rte_spinlock_unlock(&enic->memzone_list_lock);
 383
 384         return vaddr;
 385 }
 386
 387 static void
 388 enic_free_consistent(void *priv,
 389                      __rte_unused size_t size,
 390                      void *vaddr,
 391                      dma_addr_t dma_handle)
 392 {
 393         struct enic_memzone_entry *mze;
 394         struct enic *enic = (struct enic *)priv;
 395
 396         rte_spinlock_lock(&enic->memzone_list_lock);
 397         LIST_FOREACH(mze, &enic->memzone_list, entries) {
 398                 if (mze->rz->addr == vaddr &&
 399                     mze->rz->phys_addr == dma_handle)
 400                         break;
 401         }
 402         if (mze == NULL) {
 403                 rte_spinlock_unlock(&enic->memzone_list_lock);
 404                 dev_warning(enic,
 405                             "Tried to free memory, but couldn't find it in the memzone list\n");
 406                 return;
 407         }
 408         LIST_REMOVE(mze, entries);
 409         rte_spinlock_unlock(&enic->memzone_list_lock);
 410         rte_memzone_free(mze->rz);
 411         rte_free(mze);
 412 }
 413
 414 static void
 415 enic_intr_handler(__rte_unused struct rte_intr_handle *handle,
 416         void *arg)
 417 {
 418         struct enic *enic = pmd_priv((struct rte_eth_dev *)arg);
 419
 420         vnic_intr_return_all_credits(&enic->intr);
 421
 422         enic_log_q_error(enic);
 423 }
 424
 425 int enic_enable(struct enic *enic)
 426 {
 427         unsigned int index;
 428         int err;
 429         struct rte_eth_dev *eth_dev = enic->rte_dev;
 430
 431         eth_dev->data->dev_link.link_speed = vnic_dev_port_speed(enic->vdev);
 432         eth_dev->data->dev_link.link_duplex = ETH_LINK_FULL_DUPLEX;
 433
 434         if (enic_clsf_init(enic))
 435                 dev_warning(enic, "Init of hash table for clsf failed."\
 436                         "Flow director feature will not work\n");
 437
 438         for (index = 0; index < enic->rq_count; index++) {
 439                 err = enic_alloc_rx_queue_mbufs(enic,
 440                         &enic->rq[enic_sop_rq(index)]);
 441                 if (err) {
 442                         dev_err(enic, "Failed to alloc sop RX queue mbufs\n");
 443                         return err;
 444                 }
 445                 err = enic_alloc_rx_queue_mbufs(enic,
 446                         &enic->rq[enic_data_rq(index)]);
 447                 if (err) {
 448                         /* release the allocated mbufs for the sop rq*/
 449                         enic_rxmbuf_queue_release(enic,
 450                                 &enic->rq[enic_sop_rq(index)]);
 451
 452                         dev_err(enic, "Failed to alloc data RX queue mbufs\n");
 453                         return err;
 454                 }
 455         }
 456
 457         for (index = 0; index < enic->wq_count; index++)
 458                 enic_start_wq(enic, index);
 459         for (index = 0; index < enic->rq_count; index++)
 460                 enic_start_rq(enic, index);
 461
 462         vnic_dev_add_addr(enic->vdev, enic->mac_addr);
 463
 464         vnic_dev_enable_wait(enic->vdev);
 465
 466         /* Register and enable error interrupt */
 467         rte_intr_callback_register(&(enic->pdev->intr_handle),
 468                 enic_intr_handler, (void *)enic->rte_dev);
 469
 470         rte_intr_enable(&(enic->pdev->intr_handle));
 471         vnic_intr_unmask(&enic->intr);
 472
 473         return 0;
 474 }
 475
 476 int enic_alloc_intr_resources(struct enic *enic)
 477 {
 478         int err;
 479
 480         dev_info(enic, "vNIC resources used:  "\
 481                 "wq %d rq %d cq %d intr %d\n",
 482                 enic->wq_count, enic_vnic_rq_count(enic),
 483                 enic->cq_count, enic->intr_count);
 484
 485         err = vnic_intr_alloc(enic->vdev, &enic->intr, 0);
 486         if (err)
 487                 enic_free_vnic_resources(enic);
 488
 489         return err;
 490 }
 491
 492 void enic_free_rq(void *rxq)
 493 {
 494         struct vnic_rq *rq_sop, *rq_data;
 495         struct enic *enic;
 496
 497         if (rxq == NULL)
 498                 return;
 499
 500         rq_sop = (struct vnic_rq *)rxq;
 501         enic = vnic_dev_priv(rq_sop->vdev);
 502         rq_data = &enic->rq[rq_sop->data_queue_idx];
 503
 504         enic_rxmbuf_queue_release(enic, rq_sop);
 505         if (rq_data->in_use)
 506                 enic_rxmbuf_queue_release(enic, rq_data);
 507
 508         rte_free(rq_sop->mbuf_ring);
 509         if (rq_data->in_use)
 510                 rte_free(rq_data->mbuf_ring);
 511
 512         rq_sop->mbuf_ring = NULL;
 513         rq_data->mbuf_ring = NULL;
 514
 515         vnic_rq_free(rq_sop);
 516         if (rq_data->in_use)
 517                 vnic_rq_free(rq_data);
 518
 519         vnic_cq_free(&enic->cq[rq_sop->index]);
 520 }
 521
 522 void enic_start_wq(struct enic *enic, uint16_t queue_idx)
 523 {
 524         struct rte_eth_dev *eth_dev = enic->rte_dev;
 525         vnic_wq_enable(&enic->wq[queue_idx]);
 526         eth_dev->data->tx_queue_state[queue_idx] = RTE_ETH_QUEUE_STATE_STARTED;
 527 }
 528
 529 int enic_stop_wq(struct enic *enic, uint16_t queue_idx)
 530 {
 531         struct rte_eth_dev *eth_dev = enic->rte_dev;
 532         int ret;
 533
 534         ret = vnic_wq_disable(&enic->wq[queue_idx]);
 535         if (ret)
 536                 return ret;
 537
 538         eth_dev->data->tx_queue_state[queue_idx] = RTE_ETH_QUEUE_STATE_STOPPED;
 539         return 0;
 540 }
 541
 542 void enic_start_rq(struct enic *enic, uint16_t queue_idx)
 543 {
 544         struct vnic_rq *rq_sop = &enic->rq[enic_sop_rq(queue_idx)];
 545         struct vnic_rq *rq_data = &enic->rq[rq_sop->data_queue_idx];
 546         struct rte_eth_dev *eth_dev = enic->rte_dev;
 547
 548         if (rq_data->in_use)
 549                 vnic_rq_enable(rq_data);
 550         rte_mb();
 551         vnic_rq_enable(rq_sop);
 552         eth_dev->data->rx_queue_state[queue_idx] = RTE_ETH_QUEUE_STATE_STARTED;
 553 }
 554
 555 int enic_stop_rq(struct enic *enic, uint16_t queue_idx)
 556 {
 557         int ret1 = 0, ret2 = 0;
 558         struct rte_eth_dev *eth_dev = enic->rte_dev;
 559         struct vnic_rq *rq_sop = &enic->rq[enic_sop_rq(queue_idx)];
 560         struct vnic_rq *rq_data = &enic->rq[rq_sop->data_queue_idx];
 561
 562         ret2 = vnic_rq_disable(rq_sop);
 563         rte_mb();
 564         if (rq_data->in_use)
 565                 ret1 = vnic_rq_disable(rq_data);
 566
 567         if (ret2)
 568                 return ret2;
 569         else if (ret1)
 570                 return ret1;
 571
 572         eth_dev->data->rx_queue_state[queue_idx] = RTE_ETH_QUEUE_STATE_STOPPED;
 573         return 0;
 574 }
 575
 576 int enic_alloc_rq(struct enic *enic, uint16_t queue_idx,
 577         unsigned int socket_id, struct rte_mempool *mp,
 578         uint16_t nb_desc)
 579 {
 580         int rc;
 581         uint16_t sop_queue_idx = enic_sop_rq(queue_idx);
 582         uint16_t data_queue_idx = enic_data_rq(queue_idx);
 583         struct vnic_rq *rq_sop = &enic->rq[sop_queue_idx];
 584         struct vnic_rq *rq_data = &enic->rq[data_queue_idx];
 585         unsigned int mbuf_size, mbufs_per_pkt;
 586         unsigned int nb_sop_desc, nb_data_desc;
 587         uint16_t min_sop, max_sop, min_data, max_data;
 588
 589         rq_sop->is_sop = 1;
 590         rq_sop->data_queue_idx = data_queue_idx;
 591         rq_data->is_sop = 0;
 592         rq_data->data_queue_idx = 0;
 593         rq_sop->socket_id = socket_id;
 594         rq_sop->mp = mp;
 595         rq_data->socket_id = socket_id;
 596         rq_data->mp = mp;
 597         rq_sop->in_use = 1;
 598
 599         mbuf_size = (uint16_t)(rte_pktmbuf_data_room_size(mp) -
 600                                RTE_PKTMBUF_HEADROOM);
 601
 602         if (enic->rte_dev->data->dev_conf.rxmode.enable_scatter) {
 603                 dev_info(enic, "Scatter rx mode enabled\n");
 604                 /* ceil((mtu + ETHER_HDR_LEN + 4)/mbuf_size) */
 605                 mbufs_per_pkt = ((enic->config.mtu + ETHER_HDR_LEN + 4) +
 606                                  (mbuf_size - 1)) / mbuf_size;
 607         } else {
 608                 dev_info(enic, "Scatter rx mode disabled\n");
 609                 mbufs_per_pkt = 1;
 610         }
 611
 612         if (mbufs_per_pkt > 1) {
 613                 dev_info(enic, "Scatter rx mode in use\n");
 614                 rq_data->in_use = 1;
 615         } else {
 616                 dev_info(enic, "Scatter rx mode not being used\n");
 617                 rq_data->in_use = 0;
 618         }
 619
 620         /* number of descriptors have to be a multiple of 32 */
 621         nb_sop_desc = (nb_desc / mbufs_per_pkt) & ~0x1F;
 622         nb_data_desc = (nb_desc - nb_sop_desc) & ~0x1F;
 623
 624         rq_sop->max_mbufs_per_pkt = mbufs_per_pkt;
 625         rq_data->max_mbufs_per_pkt = mbufs_per_pkt;
 626
 627         if (mbufs_per_pkt > 1) {
 628                 min_sop = 64;
 629                 max_sop = ((enic->config.rq_desc_count /
 630                             (mbufs_per_pkt - 1)) & ~0x1F);
 631                 min_data = min_sop * (mbufs_per_pkt - 1);
 632                 max_data = enic->config.rq_desc_count;
 633         } else {
 634                 min_sop = 64;
 635                 max_sop = enic->config.rq_desc_count;
 636                 min_data = 0;
 637                 max_data = 0;
 638         }
 639
 640         if (nb_desc < (min_sop + min_data)) {
 641                 dev_warning(enic,
 642                             "Number of rx descs too low, adjusting to minimum\n");
 643                 nb_sop_desc = min_sop;
 644                 nb_data_desc = min_data;
 645         } else if (nb_desc > (max_sop + max_data)) {
 646                 dev_warning(enic,
 647                             "Number of rx_descs too high, adjusting to maximum\n");
 648                 nb_sop_desc = max_sop;
 649                 nb_data_desc = max_data;
 650         }
 651         if (mbufs_per_pkt > 1) {
 652                 dev_info(enic, "For mtu %d and mbuf size %d valid rx descriptor range is %d to %d\n",
 653                          enic->config.mtu, mbuf_size, min_sop + min_data,
 654                          max_sop + max_data);
 655         }
 656         dev_info(enic, "Using %d rx descriptors (sop %d, data %d)\n",
 657                  nb_sop_desc + nb_data_desc, nb_sop_desc, nb_data_desc);
 658
 659         /* Allocate sop queue resources */
 660         rc = vnic_rq_alloc(enic->vdev, rq_sop, sop_queue_idx,
 661                 nb_sop_desc, sizeof(struct rq_enet_desc));
 662         if (rc) {
 663                 dev_err(enic, "error in allocation of sop rq\n");
 664                 goto err_exit;
 665         }
 666         nb_sop_desc = rq_sop->ring.desc_count;
 667
 668         if (rq_data->in_use) {
 669                 /* Allocate data queue resources */
 670                 rc = vnic_rq_alloc(enic->vdev, rq_data, data_queue_idx,
 671                                    nb_data_desc,
 672                                    sizeof(struct rq_enet_desc));
 673                 if (rc) {
 674                         dev_err(enic, "error in allocation of data rq\n");
 675                         goto err_free_rq_sop;
 676                 }
 677                 nb_data_desc = rq_data->ring.desc_count;
 678         }
 679         rc = vnic_cq_alloc(enic->vdev, &enic->cq[queue_idx], queue_idx,
 680                            socket_id, nb_sop_desc + nb_data_desc,
 681                            sizeof(struct cq_enet_rq_desc));
 682         if (rc) {
 683                 dev_err(enic, "error in allocation of cq for rq\n");
 684                 goto err_free_rq_data;
 685         }
 686
 687         /* Allocate the mbuf rings */
 688         rq_sop->mbuf_ring = (struct rte_mbuf **)
 689                 rte_zmalloc_socket("rq->mbuf_ring",
 690                                    sizeof(struct rte_mbuf *) * nb_sop_desc,
 691                                    RTE_CACHE_LINE_SIZE, rq_sop->socket_id);
 692         if (rq_sop->mbuf_ring == NULL)
 693                 goto err_free_cq;
 694
 695         if (rq_data->in_use) {
 696                 rq_data->mbuf_ring = (struct rte_mbuf **)
 697                         rte_zmalloc_socket("rq->mbuf_ring",
 698                                 sizeof(struct rte_mbuf *) * nb_data_desc,
 699                                 RTE_CACHE_LINE_SIZE, rq_sop->socket_id);
 700                 if (rq_data->mbuf_ring == NULL)
 701                         goto err_free_sop_mbuf;
 702         }
 703
 704         return 0;
 705
 706 err_free_sop_mbuf:
 707         rte_free(rq_sop->mbuf_ring);
 708 err_free_cq:
 709         /* cleanup on error */
 710         vnic_cq_free(&enic->cq[queue_idx]);
 711 err_free_rq_data:
 712         if (rq_data->in_use)
 713                 vnic_rq_free(rq_data);
 714 err_free_rq_sop:
 715         vnic_rq_free(rq_sop);
 716 err_exit:
 717         return -ENOMEM;
 718 }
 719
 720 void enic_free_wq(void *txq)
 721 {
 722         struct vnic_wq *wq;
 723         struct enic *enic;
 724
 725         if (txq == NULL)
 726                 return;
 727
 728         wq = (struct vnic_wq *)txq;
 729         enic = vnic_dev_priv(wq->vdev);
 730         rte_memzone_free(wq->cqmsg_rz);
 731         vnic_wq_free(wq);
 732         vnic_cq_free(&enic->cq[enic->rq_count + wq->index]);
 733 }
 734
 735 int enic_alloc_wq(struct enic *enic, uint16_t queue_idx,
 736         unsigned int socket_id, uint16_t nb_desc)
 737 {
 738         int err;
 739         struct vnic_wq *wq = &enic->wq[queue_idx];
 740         unsigned int cq_index = enic_cq_wq(enic, queue_idx);
 741         char name[NAME_MAX];
 742         static int instance;
 743
 744         wq->socket_id = socket_id;
 745         if (nb_desc) {
 746                 if (nb_desc > enic->config.wq_desc_count) {
 747                         dev_warning(enic,
 748                                 "WQ %d - number of tx desc in cmd line (%d)"\
 749                                 "is greater than that in the UCSM/CIMC adapter"\
 750                                 "policy.  Applying the value in the adapter "\
 751                                 "policy (%d)\n",
 752                                 queue_idx, nb_desc, enic->config.wq_desc_count);
 753                 } else if (nb_desc != enic->config.wq_desc_count) {
 754                         enic->config.wq_desc_count = nb_desc;
 755                         dev_info(enic,
 756                                 "TX Queues - effective number of descs:%d\n",
 757                                 nb_desc);
 758                 }
 759         }
 760
 761         /* Allocate queue resources */
 762         err = vnic_wq_alloc(enic->vdev, &enic->wq[queue_idx], queue_idx,
 763                 enic->config.wq_desc_count,
 764                 sizeof(struct wq_enet_desc));
 765         if (err) {
 766                 dev_err(enic, "error in allocation of wq\n");
 767                 return err;
 768         }
 769
 770         err = vnic_cq_alloc(enic->vdev, &enic->cq[cq_index], cq_index,
 771                 socket_id, enic->config.wq_desc_count,
 772                 sizeof(struct cq_enet_wq_desc));
 773         if (err) {
 774                 vnic_wq_free(wq);
 775                 dev_err(enic, "error in allocation of cq for wq\n");
 776         }
 777
 778         /* setup up CQ message */
 779         snprintf((char *)name, sizeof(name),
 780                  "vnic_cqmsg-%s-%d-%d", enic->bdf_name, queue_idx,
 781                 instance++);
 782
 783         wq->cqmsg_rz = rte_memzone_reserve_aligned((const char *)name,
 784                                                    sizeof(uint32_t),
 785                                                    SOCKET_ID_ANY, 0,
 786                                                    ENIC_ALIGN);
 787         if (!wq->cqmsg_rz)
 788                 return -ENOMEM;
 789
 790         return err;
 791 }
 792
 793 int enic_disable(struct enic *enic)
 794 {
 795         unsigned int i;
 796         int err;
 797
 798         vnic_intr_mask(&enic->intr);
 799         (void)vnic_intr_masked(&enic->intr); /* flush write */
 800
 801         vnic_dev_disable(enic->vdev);
 802
 803         enic_clsf_destroy(enic);
 804
 805         if (!enic_is_sriov_vf(enic))
 806                 vnic_dev_del_addr(enic->vdev, enic->mac_addr);
 807
 808         for (i = 0; i < enic->wq_count; i++) {
 809                 err = vnic_wq_disable(&enic->wq[i]);
 810                 if (err)
 811                         return err;
 812         }
 813         for (i = 0; i < enic_vnic_rq_count(enic); i++) {
 814                 if (enic->rq[i].in_use) {
 815                         err = vnic_rq_disable(&enic->rq[i]);
 816                         if (err)
 817                                 return err;
 818                 }
 819         }
 820
 821         vnic_dev_set_reset_flag(enic->vdev, 1);
 822
 823         for (i = 0; i < enic->wq_count; i++)
 824                 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
 825
 826         for (i = 0; i < enic_vnic_rq_count(enic); i++)
 827                 if (enic->rq[i].in_use)
 828                         vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
 829         for (i = 0; i < enic->cq_count; i++)
 830                 vnic_cq_clean(&enic->cq[i]);
 831         vnic_intr_clean(&enic->intr);
 832
 833         return 0;
 834 }
 835
 836 static int enic_dev_wait(struct vnic_dev *vdev,
 837         int (*start)(struct vnic_dev *, int),
 838         int (*finished)(struct vnic_dev *, int *),
 839         int arg)
 840 {
 841         int done;
 842         int err;
 843         int i;
 844
 845         err = start(vdev, arg);
 846         if (err)
 847                 return err;
 848
 849         /* Wait for func to complete...2 seconds max */
 850         for (i = 0; i < 2000; i++) {
 851                 err = finished(vdev, &done);
 852                 if (err)
 853                         return err;
 854                 if (done)
 855                         return 0;
 856                 usleep(1000);
 857         }
 858         return -ETIMEDOUT;
 859 }
 860
 861 static int enic_dev_open(struct enic *enic)
 862 {
 863         int err;
 864
 865         err = enic_dev_wait(enic->vdev, vnic_dev_open,
 866                 vnic_dev_open_done, 0);
 867         if (err)
 868                 dev_err(enic_get_dev(enic),
 869                         "vNIC device open failed, err %d\n", err);
 870
 871         return err;
 872 }
 873
 874 static int enic_set_rsskey(struct enic *enic)
 875 {
 876         dma_addr_t rss_key_buf_pa;
 877         union vnic_rss_key *rss_key_buf_va = NULL;
 878         static union vnic_rss_key rss_key = {
 879                 .key = {
 880                         [0] = {.b = {85, 67, 83, 97, 119, 101, 115, 111, 109, 101}},
 881                         [1] = {.b = {80, 65, 76, 79, 117, 110, 105, 113, 117, 101}},
 882                         [2] = {.b = {76, 73, 78, 85, 88, 114, 111, 99, 107, 115}},
 883                         [3] = {.b = {69, 78, 73, 67, 105, 115, 99, 111, 111, 108}},
 884                 }
 885         };
 886         int err;
 887         u8 name[NAME_MAX];
 888
 889         snprintf((char *)name, NAME_MAX, "rss_key-%s", enic->bdf_name);
 890         rss_key_buf_va = enic_alloc_consistent(enic, sizeof(union vnic_rss_key),
 891                 &rss_key_buf_pa, name);
 892         if (!rss_key_buf_va)
 893                 return -ENOMEM;
 894
 895         rte_memcpy(rss_key_buf_va, &rss_key, sizeof(union vnic_rss_key));
 896
 897         err = enic_set_rss_key(enic,
 898                 rss_key_buf_pa,
 899                 sizeof(union vnic_rss_key));
 900
 901         enic_free_consistent(enic, sizeof(union vnic_rss_key),
 902                 rss_key_buf_va, rss_key_buf_pa);
 903
 904         return err;
 905 }
 906
 907 static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits)
 908 {
 909         dma_addr_t rss_cpu_buf_pa;
 910         union vnic_rss_cpu *rss_cpu_buf_va = NULL;
 911         int i;
 912         int err;
 913         u8 name[NAME_MAX];
 914
 915         snprintf((char *)name, NAME_MAX, "rss_cpu-%s", enic->bdf_name);
 916         rss_cpu_buf_va = enic_alloc_consistent(enic, sizeof(union vnic_rss_cpu),
 917                 &rss_cpu_buf_pa, name);
 918         if (!rss_cpu_buf_va)
 919                 return -ENOMEM;
 920
 921         for (i = 0; i < (1 << rss_hash_bits); i++)
 922                 (*rss_cpu_buf_va).cpu[i / 4].b[i % 4] =
 923                         enic_sop_rq(i % enic->rq_count);
 924
 925         err = enic_set_rss_cpu(enic,
 926                 rss_cpu_buf_pa,
 927                 sizeof(union vnic_rss_cpu));
 928
 929         enic_free_consistent(enic, sizeof(union vnic_rss_cpu),
 930                 rss_cpu_buf_va, rss_cpu_buf_pa);
 931
 932         return err;
 933 }
 934
 935 static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu,
 936         u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable)
 937 {
 938         const u8 tso_ipid_split_en = 0;
 939         int err;
 940
 941         /* Enable VLAN tag stripping */
 942
 943         err = enic_set_nic_cfg(enic,
 944                 rss_default_cpu, rss_hash_type,
 945                 rss_hash_bits, rss_base_cpu,
 946                 rss_enable, tso_ipid_split_en,
 947                 enic->ig_vlan_strip_en);
 948
 949         return err;
 950 }
 951
 952 int enic_set_rss_nic_cfg(struct enic *enic)
 953 {
 954         const u8 rss_default_cpu = 0;
 955         const u8 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 |
 956             NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 |
 957             NIC_CFG_RSS_HASH_TYPE_IPV6 |
 958             NIC_CFG_RSS_HASH_TYPE_TCP_IPV6;
 959         const u8 rss_hash_bits = 7;
 960         const u8 rss_base_cpu = 0;
 961         u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1);
 962
 963         if (rss_enable) {
 964                 if (!enic_set_rsskey(enic)) {
 965                         if (enic_set_rsscpu(enic, rss_hash_bits)) {
 966                                 rss_enable = 0;
 967                                 dev_warning(enic, "RSS disabled, "\
 968                                         "Failed to set RSS cpu indirection table.");
 969                         }
 970                 } else {
 971                         rss_enable = 0;
 972                         dev_warning(enic,
 973                                 "RSS disabled, Failed to set RSS key.\n");
 974                 }
 975         }
 976
 977         return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type,
 978                 rss_hash_bits, rss_base_cpu, rss_enable);
 979 }
 980
 981 int enic_setup_finish(struct enic *enic)
 982 {
 983         int ret;
 984
 985         enic_init_soft_stats(enic);
 986
 987         ret = enic_set_rss_nic_cfg(enic);
 988         if (ret) {
 989                 dev_err(enic, "Failed to config nic, aborting.\n");
 990                 return -1;
 991         }
 992
 993         /* Default conf */
 994         vnic_dev_packet_filter(enic->vdev,
 995                 1 /* directed  */,
 996                 1 /* multicast */,
 997                 1 /* broadcast */,
 998                 0 /* promisc   */,
 999                 1 /* allmulti  */);
1000
1001         enic->promisc = 0;
1002         enic->allmulti = 1;
1003
1004         return 0;
1005 }
1006
1007 void enic_add_packet_filter(struct enic *enic)
1008 {
1009         /* Args -> directed, multicast, broadcast, promisc, allmulti */
1010         vnic_dev_packet_filter(enic->vdev, 1, 1, 1,
1011                 enic->promisc, enic->allmulti);
1012 }
1013
1014 int enic_get_link_status(struct enic *enic)
1015 {
1016         return vnic_dev_link_status(enic->vdev);
1017 }
1018
1019 static void enic_dev_deinit(struct enic *enic)
1020 {
1021         struct rte_eth_dev *eth_dev = enic->rte_dev;
1022
1023         /* stop link status checking */
1024         vnic_dev_notify_unset(enic->vdev);
1025
1026         rte_free(eth_dev->data->mac_addrs);
1027 }
1028
1029
1030 int enic_set_vnic_res(struct enic *enic)
1031 {
1032         struct rte_eth_dev *eth_dev = enic->rte_dev;
1033         int rc = 0;
1034
1035         /* With Rx scatter support, two RQs are now used per RQ used by
1036          * the application.
1037          */
1038         if (enic->conf_rq_count < eth_dev->data->nb_rx_queues) {
1039                 dev_err(dev, "Not enough Receive queues. Requested:%u which uses %d RQs on VIC, Configured:%u\n",
1040                         eth_dev->data->nb_rx_queues,
1041                         eth_dev->data->nb_rx_queues * 2, enic->conf_rq_count);
1042                 rc = -EINVAL;
1043         }
1044         if (enic->conf_wq_count < eth_dev->data->nb_tx_queues) {
1045                 dev_err(dev, "Not enough Transmit queues. Requested:%u, Configured:%u\n",
1046                         eth_dev->data->nb_tx_queues, enic->conf_wq_count);
1047                 rc = -EINVAL;
1048         }
1049
1050         if (enic->conf_cq_count < (eth_dev->data->nb_rx_queues +
1051                                    eth_dev->data->nb_tx_queues)) {
1052                 dev_err(dev, "Not enough Completion queues. Required:%u, Configured:%u\n",
1053                         (eth_dev->data->nb_rx_queues +
1054                          eth_dev->data->nb_tx_queues), enic->conf_cq_count);
1055                 rc = -EINVAL;
1056         }
1057
1058         if (rc == 0) {
1059                 enic->rq_count = eth_dev->data->nb_rx_queues;
1060                 enic->wq_count = eth_dev->data->nb_tx_queues;
1061                 enic->cq_count = enic->rq_count + enic->wq_count;
1062         }
1063
1064         return rc;
1065 }
1066
1067 /* The Cisco NIC can send and receive packets up to a max packet size
1068  * determined by the NIC type and firmware. There is also an MTU
1069  * configured into the NIC via the CIMC/UCSM management interface
1070  * which can be overridden by this function (up to the max packet size).
1071  * Depending on the network setup, doing so may cause packet drops
1072  * and unexpected behavior.
1073  */
1074 int enic_set_mtu(struct enic *enic, uint16_t new_mtu)
1075 {
1076         uint16_t old_mtu;       /* previous setting */
1077         uint16_t config_mtu;    /* Value configured into NIC via CIMC/UCSM */
1078         struct rte_eth_dev *eth_dev = enic->rte_dev;
1079
1080         old_mtu = eth_dev->data->mtu;
1081         config_mtu = enic->config.mtu;
1082
1083         /* only works with Rx scatter disabled */
1084         if (enic->rte_dev->data->dev_conf.rxmode.enable_scatter)
1085                 return -ENOTSUP;
1086
1087         if (new_mtu > enic->max_mtu) {
1088                 dev_err(enic,
1089                         "MTU not updated: requested (%u) greater than max (%u)\n",
1090                         new_mtu, enic->max_mtu);
1091                 return -EINVAL;
1092         }
1093         if (new_mtu < ENIC_MIN_MTU) {
1094                 dev_info(enic,
1095                         "MTU not updated: requested (%u) less than min (%u)\n",
1096                         new_mtu, ENIC_MIN_MTU);
1097                 return -EINVAL;
1098         }
1099         if (new_mtu > config_mtu)
1100                 dev_warning(enic,
1101                         "MTU (%u) is greater than value configured in NIC (%u)\n",
1102                         new_mtu, config_mtu);
1103
1104         /* update the mtu */
1105         eth_dev->data->mtu = new_mtu;
1106
1107         dev_info(enic, "MTU changed from %u to %u\n",  old_mtu, new_mtu);
1108         return 0;
1109 }
1110
1111 static int enic_dev_init(struct enic *enic)
1112 {
1113         int err;
1114         struct rte_eth_dev *eth_dev = enic->rte_dev;
1115
1116         vnic_dev_intr_coal_timer_info_default(enic->vdev);
1117
1118         /* Get vNIC configuration
1119         */
1120         err = enic_get_vnic_config(enic);
1121         if (err) {
1122                 dev_err(dev, "Get vNIC configuration failed, aborting\n");
1123                 return err;
1124         }
1125
1126         eth_dev->data->mac_addrs = rte_zmalloc("enic_mac_addr", ETH_ALEN, 0);
1127         if (!eth_dev->data->mac_addrs) {
1128                 dev_err(enic, "mac addr storage alloc failed, aborting.\n");
1129                 return -1;
1130         }
1131         ether_addr_copy((struct ether_addr *) enic->mac_addr,
1132                 &eth_dev->data->mac_addrs[0]);
1133
1134
1135         /* Get available resource counts
1136         */
1137         enic_get_res_counts(enic);
1138
1139         vnic_dev_set_reset_flag(enic->vdev, 0);
1140
1141         /* set up link status checking */
1142         vnic_dev_notify_set(enic->vdev, -1); /* No Intr for notify */
1143
1144         return 0;
1145
1146 }
1147
1148 int enic_probe(struct enic *enic)
1149 {
1150         struct rte_pci_device *pdev = enic->pdev;
1151         int err = -1;
1152
1153         dev_debug(enic, " Initializing ENIC PMD\n");
1154
1155         enic->bar0.vaddr = (void *)pdev->mem_resource[0].addr;
1156         enic->bar0.len = pdev->mem_resource[0].len;
1157
1158         /* Register vNIC device */
1159         enic->vdev = vnic_dev_register(NULL, enic, enic->pdev, &enic->bar0, 1);
1160         if (!enic->vdev) {
1161                 dev_err(enic, "vNIC registration failed, aborting\n");
1162                 goto err_out;
1163         }
1164
1165         LIST_INIT(&enic->memzone_list);
1166         rte_spinlock_init(&enic->memzone_list_lock);
1167
1168         vnic_register_cbacks(enic->vdev,
1169                 enic_alloc_consistent,
1170                 enic_free_consistent);
1171
1172         /* Issue device open to get device in known state */
1173         err = enic_dev_open(enic);
1174         if (err) {
1175                 dev_err(enic, "vNIC dev open failed, aborting\n");
1176                 goto err_out_unregister;
1177         }
1178
1179         /* Set ingress vlan rewrite mode before vnic initialization */
1180         err = vnic_dev_set_ig_vlan_rewrite_mode(enic->vdev,
1181                 IG_VLAN_REWRITE_MODE_PASS_THRU);
1182         if (err) {
1183                 dev_err(enic,
1184                         "Failed to set ingress vlan rewrite mode, aborting.\n");
1185                 goto err_out_dev_close;
1186         }
1187
1188         /* Issue device init to initialize the vnic-to-switch link.
1189          * We'll start with carrier off and wait for link UP
1190          * notification later to turn on carrier.  We don't need
1191          * to wait here for the vnic-to-switch link initialization
1192          * to complete; link UP notification is the indication that
1193          * the process is complete.
1194          */
1195
1196         err = vnic_dev_init(enic->vdev, 0);
1197         if (err) {
1198                 dev_err(enic, "vNIC dev init failed, aborting\n");
1199                 goto err_out_dev_close;
1200         }
1201
1202         err = enic_dev_init(enic);
1203         if (err) {
1204                 dev_err(enic, "Device initialization failed, aborting\n");
1205                 goto err_out_dev_close;
1206         }
1207
1208         return 0;
1209
1210 err_out_dev_close:
1211         vnic_dev_close(enic->vdev);
1212 err_out_unregister:
1213         vnic_dev_unregister(enic->vdev);
1214 err_out:
1215         return err;
1216 }
1217
1218 void enic_remove(struct enic *enic)
1219 {
1220         enic_dev_deinit(enic);
1221         vnic_dev_close(enic->vdev);
1222         vnic_dev_unregister(enic->vdev);
1223 }