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         vnic_dev_notify_set(enic->vdev, -1); /* No Intr for notify */
 434
 435         if (enic_clsf_init(enic))
 436                 dev_warning(enic, "Init of hash table for clsf failed."\
 437                         "Flow director feature will not work\n");
 438
 439         for (index = 0; index < enic->rq_count; index++) {
 440                 err = enic_alloc_rx_queue_mbufs(enic,
 441                         &enic->rq[enic_sop_rq(index)]);
 442                 if (err) {
 443                         dev_err(enic, "Failed to alloc sop RX queue mbufs\n");
 444                         return err;
 445                 }
 446                 err = enic_alloc_rx_queue_mbufs(enic,
 447                         &enic->rq[enic_data_rq(index)]);
 448                 if (err) {
 449                         /* release the allocated mbufs for the sop rq*/
 450                         enic_rxmbuf_queue_release(enic,
 451                                 &enic->rq[enic_sop_rq(index)]);
 452
 453                         dev_err(enic, "Failed to alloc data RX queue mbufs\n");
 454                         return err;
 455                 }
 456         }
 457
 458         for (index = 0; index < enic->wq_count; index++)
 459                 enic_start_wq(enic, index);
 460         for (index = 0; index < enic->rq_count; index++)
 461                 enic_start_rq(enic, index);
 462
 463         vnic_dev_add_addr(enic->vdev, enic->mac_addr);
 464
 465         vnic_dev_enable_wait(enic->vdev);
 466
 467         /* Register and enable error interrupt */
 468         rte_intr_callback_register(&(enic->pdev->intr_handle),
 469                 enic_intr_handler, (void *)enic->rte_dev);
 470
 471         rte_intr_enable(&(enic->pdev->intr_handle));
 472         vnic_intr_unmask(&enic->intr);
 473
 474         return 0;
 475 }
 476
 477 int enic_alloc_intr_resources(struct enic *enic)
 478 {
 479         int err;
 480
 481         dev_info(enic, "vNIC resources used:  "\
 482                 "wq %d rq %d cq %d intr %d\n",
 483                 enic->wq_count, enic_vnic_rq_count(enic),
 484                 enic->cq_count, enic->intr_count);
 485
 486         err = vnic_intr_alloc(enic->vdev, &enic->intr, 0);
 487         if (err)
 488                 enic_free_vnic_resources(enic);
 489
 490         return err;
 491 }
 492
 493 void enic_free_rq(void *rxq)
 494 {
 495         struct vnic_rq *rq_sop, *rq_data;
 496         struct enic *enic;
 497
 498         if (rxq == NULL)
 499                 return;
 500
 501         rq_sop = (struct vnic_rq *)rxq;
 502         enic = vnic_dev_priv(rq_sop->vdev);
 503         rq_data = &enic->rq[rq_sop->data_queue_idx];
 504
 505         enic_rxmbuf_queue_release(enic, rq_sop);
 506         if (rq_data->in_use)
 507                 enic_rxmbuf_queue_release(enic, rq_data);
 508
 509         rte_free(rq_sop->mbuf_ring);
 510         if (rq_data->in_use)
 511                 rte_free(rq_data->mbuf_ring);
 512
 513         rq_sop->mbuf_ring = NULL;
 514         rq_data->mbuf_ring = NULL;
 515
 516         vnic_rq_free(rq_sop);
 517         if (rq_data->in_use)
 518                 vnic_rq_free(rq_data);
 519
 520         vnic_cq_free(&enic->cq[rq_sop->index]);
 521 }
 522
 523 void enic_start_wq(struct enic *enic, uint16_t queue_idx)
 524 {
 525         struct rte_eth_dev *eth_dev = enic->rte_dev;
 526         vnic_wq_enable(&enic->wq[queue_idx]);
 527         eth_dev->data->tx_queue_state[queue_idx] = RTE_ETH_QUEUE_STATE_STARTED;
 528 }
 529
 530 int enic_stop_wq(struct enic *enic, uint16_t queue_idx)
 531 {
 532         struct rte_eth_dev *eth_dev = enic->rte_dev;
 533         int ret;
 534
 535         ret = vnic_wq_disable(&enic->wq[queue_idx]);
 536         if (ret)
 537                 return ret;
 538
 539         eth_dev->data->tx_queue_state[queue_idx] = RTE_ETH_QUEUE_STATE_STOPPED;
 540         return 0;
 541 }
 542
 543 void enic_start_rq(struct enic *enic, uint16_t queue_idx)
 544 {
 545         struct vnic_rq *rq_sop = &enic->rq[enic_sop_rq(queue_idx)];
 546         struct vnic_rq *rq_data = &enic->rq[rq_sop->data_queue_idx];
 547         struct rte_eth_dev *eth_dev = enic->rte_dev;
 548
 549         if (rq_data->in_use)
 550                 vnic_rq_enable(rq_data);
 551         rte_mb();
 552         vnic_rq_enable(rq_sop);
 553         eth_dev->data->rx_queue_state[queue_idx] = RTE_ETH_QUEUE_STATE_STARTED;
 554 }
 555
 556 int enic_stop_rq(struct enic *enic, uint16_t queue_idx)
 557 {
 558         int ret1 = 0, ret2 = 0;
 559         struct rte_eth_dev *eth_dev = enic->rte_dev;
 560         struct vnic_rq *rq_sop = &enic->rq[enic_sop_rq(queue_idx)];
 561         struct vnic_rq *rq_data = &enic->rq[rq_sop->data_queue_idx];
 562
 563         ret2 = vnic_rq_disable(rq_sop);
 564         rte_mb();
 565         if (rq_data->in_use)
 566                 ret1 = vnic_rq_disable(rq_data);
 567
 568         if (ret2)
 569                 return ret2;
 570         else if (ret1)
 571                 return ret1;
 572
 573         eth_dev->data->rx_queue_state[queue_idx] = RTE_ETH_QUEUE_STATE_STOPPED;
 574         return 0;
 575 }
 576
 577 int enic_alloc_rq(struct enic *enic, uint16_t queue_idx,
 578         unsigned int socket_id, struct rte_mempool *mp,
 579         uint16_t nb_desc)
 580 {
 581         int rc;
 582         uint16_t sop_queue_idx = enic_sop_rq(queue_idx);
 583         uint16_t data_queue_idx = enic_data_rq(queue_idx);
 584         struct vnic_rq *rq_sop = &enic->rq[sop_queue_idx];
 585         struct vnic_rq *rq_data = &enic->rq[data_queue_idx];
 586         unsigned int mbuf_size, mbufs_per_pkt;
 587         unsigned int nb_sop_desc, nb_data_desc;
 588         uint16_t min_sop, max_sop, min_data, max_data;
 589
 590         rq_sop->is_sop = 1;
 591         rq_sop->data_queue_idx = data_queue_idx;
 592         rq_data->is_sop = 0;
 593         rq_data->data_queue_idx = 0;
 594         rq_sop->socket_id = socket_id;
 595         rq_sop->mp = mp;
 596         rq_data->socket_id = socket_id;
 597         rq_data->mp = mp;
 598         rq_sop->in_use = 1;
 599
 600         mbuf_size = (uint16_t)(rte_pktmbuf_data_room_size(mp) -
 601                                RTE_PKTMBUF_HEADROOM);
 602
 603         if (enic->rte_dev->data->dev_conf.rxmode.enable_scatter) {
 604                 dev_info(enic, "Scatter rx mode enabled\n");
 605                 /* ceil((mtu + ETHER_HDR_LEN + 4)/mbuf_size) */
 606                 mbufs_per_pkt = ((enic->config.mtu + ETHER_HDR_LEN + 4) +
 607                                  (mbuf_size - 1)) / mbuf_size;
 608         } else {
 609                 dev_info(enic, "Scatter rx mode disabled\n");
 610                 mbufs_per_pkt = 1;
 611         }
 612
 613         if (mbufs_per_pkt > 1) {
 614                 dev_info(enic, "Scatter rx mode in use\n");
 615                 rq_data->in_use = 1;
 616         } else {
 617                 dev_info(enic, "Scatter rx mode not being used\n");
 618                 rq_data->in_use = 0;
 619         }
 620
 621         /* number of descriptors have to be a multiple of 32 */
 622         nb_sop_desc = (nb_desc / mbufs_per_pkt) & ~0x1F;
 623         nb_data_desc = (nb_desc - nb_sop_desc) & ~0x1F;
 624
 625         rq_sop->max_mbufs_per_pkt = mbufs_per_pkt;
 626         rq_data->max_mbufs_per_pkt = mbufs_per_pkt;
 627
 628         if (mbufs_per_pkt > 1) {
 629                 min_sop = 64;
 630                 max_sop = ((enic->config.rq_desc_count /
 631                             (mbufs_per_pkt - 1)) & ~0x1F);
 632                 min_data = min_sop * (mbufs_per_pkt - 1);
 633                 max_data = enic->config.rq_desc_count;
 634         } else {
 635                 min_sop = 64;
 636                 max_sop = enic->config.rq_desc_count;
 637                 min_data = 0;
 638                 max_data = 0;
 639         }
 640
 641         if (nb_desc < (min_sop + min_data)) {
 642                 dev_warning(enic,
 643                             "Number of rx descs too low, adjusting to minimum\n");
 644                 nb_sop_desc = min_sop;
 645                 nb_data_desc = min_data;
 646         } else if (nb_desc > (max_sop + max_data)) {
 647                 dev_warning(enic,
 648                             "Number of rx_descs too high, adjusting to maximum\n");
 649                 nb_sop_desc = max_sop;
 650                 nb_data_desc = max_data;
 651         }
 652         if (mbufs_per_pkt > 1) {
 653                 dev_info(enic, "For mtu %d and mbuf size %d valid rx descriptor range is %d to %d\n",
 654                          enic->config.mtu, mbuf_size, min_sop + min_data,
 655                          max_sop + max_data);
 656         }
 657         dev_info(enic, "Using %d rx descriptors (sop %d, data %d)\n",
 658                  nb_sop_desc + nb_data_desc, nb_sop_desc, nb_data_desc);
 659
 660         /* Allocate sop queue resources */
 661         rc = vnic_rq_alloc(enic->vdev, rq_sop, sop_queue_idx,
 662                 nb_sop_desc, sizeof(struct rq_enet_desc));
 663         if (rc) {
 664                 dev_err(enic, "error in allocation of sop rq\n");
 665                 goto err_exit;
 666         }
 667         nb_sop_desc = rq_sop->ring.desc_count;
 668
 669         if (rq_data->in_use) {
 670                 /* Allocate data queue resources */
 671                 rc = vnic_rq_alloc(enic->vdev, rq_data, data_queue_idx,
 672                                    nb_data_desc,
 673                                    sizeof(struct rq_enet_desc));
 674                 if (rc) {
 675                         dev_err(enic, "error in allocation of data rq\n");
 676                         goto err_free_rq_sop;
 677                 }
 678                 nb_data_desc = rq_data->ring.desc_count;
 679         }
 680         rc = vnic_cq_alloc(enic->vdev, &enic->cq[queue_idx], queue_idx,
 681                            socket_id, nb_sop_desc + nb_data_desc,
 682                            sizeof(struct cq_enet_rq_desc));
 683         if (rc) {
 684                 dev_err(enic, "error in allocation of cq for rq\n");
 685                 goto err_free_rq_data;
 686         }
 687
 688         /* Allocate the mbuf rings */
 689         rq_sop->mbuf_ring = (struct rte_mbuf **)
 690                 rte_zmalloc_socket("rq->mbuf_ring",
 691                                    sizeof(struct rte_mbuf *) * nb_sop_desc,
 692                                    RTE_CACHE_LINE_SIZE, rq_sop->socket_id);
 693         if (rq_sop->mbuf_ring == NULL)
 694                 goto err_free_cq;
 695
 696         if (rq_data->in_use) {
 697                 rq_data->mbuf_ring = (struct rte_mbuf **)
 698                         rte_zmalloc_socket("rq->mbuf_ring",
 699                                 sizeof(struct rte_mbuf *) * nb_data_desc,
 700                                 RTE_CACHE_LINE_SIZE, rq_sop->socket_id);
 701                 if (rq_data->mbuf_ring == NULL)
 702                         goto err_free_sop_mbuf;
 703         }
 704
 705         return 0;
 706
 707 err_free_sop_mbuf:
 708         rte_free(rq_sop->mbuf_ring);
 709 err_free_cq:
 710         /* cleanup on error */
 711         vnic_cq_free(&enic->cq[queue_idx]);
 712 err_free_rq_data:
 713         if (rq_data->in_use)
 714                 vnic_rq_free(rq_data);
 715 err_free_rq_sop:
 716         vnic_rq_free(rq_sop);
 717 err_exit:
 718         return -ENOMEM;
 719 }
 720
 721 void enic_free_wq(void *txq)
 722 {
 723         struct vnic_wq *wq;
 724         struct enic *enic;
 725
 726         if (txq == NULL)
 727                 return;
 728
 729         wq = (struct vnic_wq *)txq;
 730         enic = vnic_dev_priv(wq->vdev);
 731         rte_memzone_free(wq->cqmsg_rz);
 732         vnic_wq_free(wq);
 733         vnic_cq_free(&enic->cq[enic->rq_count + wq->index]);
 734 }
 735
 736 int enic_alloc_wq(struct enic *enic, uint16_t queue_idx,
 737         unsigned int socket_id, uint16_t nb_desc)
 738 {
 739         int err;
 740         struct vnic_wq *wq = &enic->wq[queue_idx];
 741         unsigned int cq_index = enic_cq_wq(enic, queue_idx);
 742         char name[NAME_MAX];
 743         static int instance;
 744
 745         wq->socket_id = socket_id;
 746         if (nb_desc) {
 747                 if (nb_desc > enic->config.wq_desc_count) {
 748                         dev_warning(enic,
 749                                 "WQ %d - number of tx desc in cmd line (%d)"\
 750                                 "is greater than that in the UCSM/CIMC adapter"\
 751                                 "policy.  Applying the value in the adapter "\
 752                                 "policy (%d)\n",
 753                                 queue_idx, nb_desc, enic->config.wq_desc_count);
 754                 } else if (nb_desc != enic->config.wq_desc_count) {
 755                         enic->config.wq_desc_count = nb_desc;
 756                         dev_info(enic,
 757                                 "TX Queues - effective number of descs:%d\n",
 758                                 nb_desc);
 759                 }
 760         }
 761
 762         /* Allocate queue resources */
 763         err = vnic_wq_alloc(enic->vdev, &enic->wq[queue_idx], queue_idx,
 764                 enic->config.wq_desc_count,
 765                 sizeof(struct wq_enet_desc));
 766         if (err) {
 767                 dev_err(enic, "error in allocation of wq\n");
 768                 return err;
 769         }
 770
 771         err = vnic_cq_alloc(enic->vdev, &enic->cq[cq_index], cq_index,
 772                 socket_id, enic->config.wq_desc_count,
 773                 sizeof(struct cq_enet_wq_desc));
 774         if (err) {
 775                 vnic_wq_free(wq);
 776                 dev_err(enic, "error in allocation of cq for wq\n");
 777         }
 778
 779         /* setup up CQ message */
 780         snprintf((char *)name, sizeof(name),
 781                  "vnic_cqmsg-%s-%d-%d", enic->bdf_name, queue_idx,
 782                 instance++);
 783
 784         wq->cqmsg_rz = rte_memzone_reserve_aligned((const char *)name,
 785                                                    sizeof(uint32_t),
 786                                                    SOCKET_ID_ANY, 0,
 787                                                    ENIC_ALIGN);
 788         if (!wq->cqmsg_rz)
 789                 return -ENOMEM;
 790
 791         return err;
 792 }
 793
 794 int enic_disable(struct enic *enic)
 795 {
 796         unsigned int i;
 797         int err;
 798
 799         vnic_intr_mask(&enic->intr);
 800         (void)vnic_intr_masked(&enic->intr); /* flush write */
 801
 802         vnic_dev_disable(enic->vdev);
 803
 804         enic_clsf_destroy(enic);
 805
 806         if (!enic_is_sriov_vf(enic))
 807                 vnic_dev_del_addr(enic->vdev, enic->mac_addr);
 808
 809         for (i = 0; i < enic->wq_count; i++) {
 810                 err = vnic_wq_disable(&enic->wq[i]);
 811                 if (err)
 812                         return err;
 813         }
 814         for (i = 0; i < enic_vnic_rq_count(enic); i++) {
 815                 if (enic->rq[i].in_use) {
 816                         err = vnic_rq_disable(&enic->rq[i]);
 817                         if (err)
 818                                 return err;
 819                 }
 820         }
 821
 822         vnic_dev_set_reset_flag(enic->vdev, 1);
 823         vnic_dev_notify_unset(enic->vdev);
 824
 825         for (i = 0; i < enic->wq_count; i++)
 826                 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
 827
 828         for (i = 0; i < enic_vnic_rq_count(enic); i++)
 829                 if (enic->rq[i].in_use)
 830                         vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
 831         for (i = 0; i < enic->cq_count; i++)
 832                 vnic_cq_clean(&enic->cq[i]);
 833         vnic_intr_clean(&enic->intr);
 834
 835         return 0;
 836 }
 837
 838 static int enic_dev_wait(struct vnic_dev *vdev,
 839         int (*start)(struct vnic_dev *, int),
 840         int (*finished)(struct vnic_dev *, int *),
 841         int arg)
 842 {
 843         int done;
 844         int err;
 845         int i;
 846
 847         err = start(vdev, arg);
 848         if (err)
 849                 return err;
 850
 851         /* Wait for func to complete...2 seconds max */
 852         for (i = 0; i < 2000; i++) {
 853                 err = finished(vdev, &done);
 854                 if (err)
 855                         return err;
 856                 if (done)
 857                         return 0;
 858                 usleep(1000);
 859         }
 860         return -ETIMEDOUT;
 861 }
 862
 863 static int enic_dev_open(struct enic *enic)
 864 {
 865         int err;
 866
 867         err = enic_dev_wait(enic->vdev, vnic_dev_open,
 868                 vnic_dev_open_done, 0);
 869         if (err)
 870                 dev_err(enic_get_dev(enic),
 871                         "vNIC device open failed, err %d\n", err);
 872
 873         return err;
 874 }
 875
 876 static int enic_set_rsskey(struct enic *enic)
 877 {
 878         dma_addr_t rss_key_buf_pa;
 879         union vnic_rss_key *rss_key_buf_va = NULL;
 880         static union vnic_rss_key rss_key = {
 881                 .key = {
 882                         [0] = {.b = {85, 67, 83, 97, 119, 101, 115, 111, 109, 101}},
 883                         [1] = {.b = {80, 65, 76, 79, 117, 110, 105, 113, 117, 101}},
 884                         [2] = {.b = {76, 73, 78, 85, 88, 114, 111, 99, 107, 115}},
 885                         [3] = {.b = {69, 78, 73, 67, 105, 115, 99, 111, 111, 108}},
 886                 }
 887         };
 888         int err;
 889         u8 name[NAME_MAX];
 890
 891         snprintf((char *)name, NAME_MAX, "rss_key-%s", enic->bdf_name);
 892         rss_key_buf_va = enic_alloc_consistent(enic, sizeof(union vnic_rss_key),
 893                 &rss_key_buf_pa, name);
 894         if (!rss_key_buf_va)
 895                 return -ENOMEM;
 896
 897         rte_memcpy(rss_key_buf_va, &rss_key, sizeof(union vnic_rss_key));
 898
 899         err = enic_set_rss_key(enic,
 900                 rss_key_buf_pa,
 901                 sizeof(union vnic_rss_key));
 902
 903         enic_free_consistent(enic, sizeof(union vnic_rss_key),
 904                 rss_key_buf_va, rss_key_buf_pa);
 905
 906         return err;
 907 }
 908
 909 static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits)
 910 {
 911         dma_addr_t rss_cpu_buf_pa;
 912         union vnic_rss_cpu *rss_cpu_buf_va = NULL;
 913         int i;
 914         int err;
 915         u8 name[NAME_MAX];
 916
 917         snprintf((char *)name, NAME_MAX, "rss_cpu-%s", enic->bdf_name);
 918         rss_cpu_buf_va = enic_alloc_consistent(enic, sizeof(union vnic_rss_cpu),
 919                 &rss_cpu_buf_pa, name);
 920         if (!rss_cpu_buf_va)
 921                 return -ENOMEM;
 922
 923         for (i = 0; i < (1 << rss_hash_bits); i++)
 924                 (*rss_cpu_buf_va).cpu[i / 4].b[i % 4] =
 925                         enic_sop_rq(i % enic->rq_count);
 926
 927         err = enic_set_rss_cpu(enic,
 928                 rss_cpu_buf_pa,
 929                 sizeof(union vnic_rss_cpu));
 930
 931         enic_free_consistent(enic, sizeof(union vnic_rss_cpu),
 932                 rss_cpu_buf_va, rss_cpu_buf_pa);
 933
 934         return err;
 935 }
 936
 937 static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu,
 938         u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable)
 939 {
 940         const u8 tso_ipid_split_en = 0;
 941         int err;
 942
 943         /* Enable VLAN tag stripping */
 944
 945         err = enic_set_nic_cfg(enic,
 946                 rss_default_cpu, rss_hash_type,
 947                 rss_hash_bits, rss_base_cpu,
 948                 rss_enable, tso_ipid_split_en,
 949                 enic->ig_vlan_strip_en);
 950
 951         return err;
 952 }
 953
 954 int enic_set_rss_nic_cfg(struct enic *enic)
 955 {
 956         const u8 rss_default_cpu = 0;
 957         const u8 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 |
 958             NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 |
 959             NIC_CFG_RSS_HASH_TYPE_IPV6 |
 960             NIC_CFG_RSS_HASH_TYPE_TCP_IPV6;
 961         const u8 rss_hash_bits = 7;
 962         const u8 rss_base_cpu = 0;
 963         u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1);
 964
 965         if (rss_enable) {
 966                 if (!enic_set_rsskey(enic)) {
 967                         if (enic_set_rsscpu(enic, rss_hash_bits)) {
 968                                 rss_enable = 0;
 969                                 dev_warning(enic, "RSS disabled, "\
 970                                         "Failed to set RSS cpu indirection table.");
 971                         }
 972                 } else {
 973                         rss_enable = 0;
 974                         dev_warning(enic,
 975                                 "RSS disabled, Failed to set RSS key.\n");
 976                 }
 977         }
 978
 979         return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type,
 980                 rss_hash_bits, rss_base_cpu, rss_enable);
 981 }
 982
 983 int enic_setup_finish(struct enic *enic)
 984 {
 985         int ret;
 986
 987         enic_init_soft_stats(enic);
 988
 989         ret = enic_set_rss_nic_cfg(enic);
 990         if (ret) {
 991                 dev_err(enic, "Failed to config nic, aborting.\n");
 992                 return -1;
 993         }
 994
 995         /* Default conf */
 996         vnic_dev_packet_filter(enic->vdev,
 997                 1 /* directed  */,
 998                 1 /* multicast */,
 999                 1 /* broadcast */,
1000                 0 /* promisc   */,
1001                 1 /* allmulti  */);
1002
1003         enic->promisc = 0;
1004         enic->allmulti = 1;
1005
1006         return 0;
1007 }
1008
1009 void enic_add_packet_filter(struct enic *enic)
1010 {
1011         /* Args -> directed, multicast, broadcast, promisc, allmulti */
1012         vnic_dev_packet_filter(enic->vdev, 1, 1, 1,
1013                 enic->promisc, enic->allmulti);
1014 }
1015
1016 int enic_get_link_status(struct enic *enic)
1017 {
1018         return vnic_dev_link_status(enic->vdev);
1019 }
1020
1021 static void enic_dev_deinit(struct enic *enic)
1022 {
1023         struct rte_eth_dev *eth_dev = enic->rte_dev;
1024
1025         rte_free(eth_dev->data->mac_addrs);
1026 }
1027
1028
1029 int enic_set_vnic_res(struct enic *enic)
1030 {
1031         struct rte_eth_dev *eth_dev = enic->rte_dev;
1032         int rc = 0;
1033
1034         /* With Rx scatter support, two RQs are now used per RQ used by
1035          * the application.
1036          */
1037         if (enic->conf_rq_count < eth_dev->data->nb_rx_queues) {
1038                 dev_err(dev, "Not enough Receive queues. Requested:%u which uses %d RQs on VIC, Configured:%u\n",
1039                         eth_dev->data->nb_rx_queues,
1040                         eth_dev->data->nb_rx_queues * 2, enic->conf_rq_count);
1041                 rc = -EINVAL;
1042         }
1043         if (enic->conf_wq_count < eth_dev->data->nb_tx_queues) {
1044                 dev_err(dev, "Not enough Transmit queues. Requested:%u, Configured:%u\n",
1045                         eth_dev->data->nb_tx_queues, enic->conf_wq_count);
1046                 rc = -EINVAL;
1047         }
1048
1049         if (enic->conf_cq_count < (eth_dev->data->nb_rx_queues +
1050                                    eth_dev->data->nb_tx_queues)) {
1051                 dev_err(dev, "Not enough Completion queues. Required:%u, Configured:%u\n",
1052                         (eth_dev->data->nb_rx_queues +
1053                          eth_dev->data->nb_tx_queues), enic->conf_cq_count);
1054                 rc = -EINVAL;
1055         }
1056
1057         if (rc == 0) {
1058                 enic->rq_count = eth_dev->data->nb_rx_queues;
1059                 enic->wq_count = eth_dev->data->nb_tx_queues;
1060                 enic->cq_count = enic->rq_count + enic->wq_count;
1061         }
1062
1063         return rc;
1064 }
1065
1066 /* The Cisco NIC can send and receive packets up to a max packet size
1067  * determined by the NIC type and firmware. There is also an MTU
1068  * configured into the NIC via the CIMC/UCSM management interface
1069  * which can be overridden by this function (up to the max packet size).
1070  * Depending on the network setup, doing so may cause packet drops
1071  * and unexpected behavior.
1072  */
1073 int enic_set_mtu(struct enic *enic, uint16_t new_mtu)
1074 {
1075         uint16_t old_mtu;       /* previous setting */
1076         uint16_t config_mtu;    /* Value configured into NIC via CIMC/UCSM */
1077         struct rte_eth_dev *eth_dev = enic->rte_dev;
1078
1079         old_mtu = eth_dev->data->mtu;
1080         config_mtu = enic->config.mtu;
1081
1082         /* only works with Rx scatter disabled */
1083         if (enic->rte_dev->data->dev_conf.rxmode.enable_scatter)
1084                 return -ENOTSUP;
1085
1086         if (new_mtu > enic->max_mtu) {
1087                 dev_err(enic,
1088                         "MTU not updated: requested (%u) greater than max (%u)\n",
1089                         new_mtu, enic->max_mtu);
1090                 return -EINVAL;
1091         }
1092         if (new_mtu < ENIC_MIN_MTU) {
1093                 dev_info(enic,
1094                         "MTU not updated: requested (%u) less than min (%u)\n",
1095                         new_mtu, ENIC_MIN_MTU);
1096                 return -EINVAL;
1097         }
1098         if (new_mtu > config_mtu)
1099                 dev_warning(enic,
1100                         "MTU (%u) is greater than value configured in NIC (%u)\n",
1101                         new_mtu, config_mtu);
1102
1103         /* update the mtu */
1104         eth_dev->data->mtu = new_mtu;
1105
1106         dev_info(enic, "MTU changed from %u to %u\n",  old_mtu, new_mtu);
1107         return 0;
1108 }
1109
1110 static int enic_dev_init(struct enic *enic)
1111 {
1112         int err;
1113         struct rte_eth_dev *eth_dev = enic->rte_dev;
1114
1115         vnic_dev_intr_coal_timer_info_default(enic->vdev);
1116
1117         /* Get vNIC configuration
1118         */
1119         err = enic_get_vnic_config(enic);
1120         if (err) {
1121                 dev_err(dev, "Get vNIC configuration failed, aborting\n");
1122                 return err;
1123         }
1124
1125         eth_dev->data->mac_addrs = rte_zmalloc("enic_mac_addr", ETH_ALEN, 0);
1126         if (!eth_dev->data->mac_addrs) {
1127                 dev_err(enic, "mac addr storage alloc failed, aborting.\n");
1128                 return -1;
1129         }
1130         ether_addr_copy((struct ether_addr *) enic->mac_addr,
1131                 &eth_dev->data->mac_addrs[0]);
1132
1133
1134         /* Get available resource counts
1135         */
1136         enic_get_res_counts(enic);
1137
1138         vnic_dev_set_reset_flag(enic->vdev, 0);
1139
1140         return 0;
1141
1142 }
1143
1144 int enic_probe(struct enic *enic)
1145 {
1146         struct rte_pci_device *pdev = enic->pdev;
1147         int err = -1;
1148
1149         dev_debug(enic, " Initializing ENIC PMD\n");
1150
1151         enic->bar0.vaddr = (void *)pdev->mem_resource[0].addr;
1152         enic->bar0.len = pdev->mem_resource[0].len;
1153
1154         /* Register vNIC device */
1155         enic->vdev = vnic_dev_register(NULL, enic, enic->pdev, &enic->bar0, 1);
1156         if (!enic->vdev) {
1157                 dev_err(enic, "vNIC registration failed, aborting\n");
1158                 goto err_out;
1159         }
1160
1161         LIST_INIT(&enic->memzone_list);
1162         rte_spinlock_init(&enic->memzone_list_lock);
1163
1164         vnic_register_cbacks(enic->vdev,
1165                 enic_alloc_consistent,
1166                 enic_free_consistent);
1167
1168         /* Issue device open to get device in known state */
1169         err = enic_dev_open(enic);
1170         if (err) {
1171                 dev_err(enic, "vNIC dev open failed, aborting\n");
1172                 goto err_out_unregister;
1173         }
1174
1175         /* Set ingress vlan rewrite mode before vnic initialization */
1176         err = vnic_dev_set_ig_vlan_rewrite_mode(enic->vdev,
1177                 IG_VLAN_REWRITE_MODE_PASS_THRU);
1178         if (err) {
1179                 dev_err(enic,
1180                         "Failed to set ingress vlan rewrite mode, aborting.\n");
1181                 goto err_out_dev_close;
1182         }
1183
1184         /* Issue device init to initialize the vnic-to-switch link.
1185          * We'll start with carrier off and wait for link UP
1186          * notification later to turn on carrier.  We don't need
1187          * to wait here for the vnic-to-switch link initialization
1188          * to complete; link UP notification is the indication that
1189          * the process is complete.
1190          */
1191
1192         err = vnic_dev_init(enic->vdev, 0);
1193         if (err) {
1194                 dev_err(enic, "vNIC dev init failed, aborting\n");
1195                 goto err_out_dev_close;
1196         }
1197
1198         err = enic_dev_init(enic);
1199         if (err) {
1200                 dev_err(enic, "Device initialization failed, aborting\n");
1201                 goto err_out_dev_close;
1202         }
1203
1204         return 0;
1205
1206 err_out_dev_close:
1207         vnic_dev_close(enic->vdev);
1208 err_out_unregister:
1209         vnic_dev_unregister(enic->vdev);
1210 err_out:
1211         return err;
1212 }
1213
1214 void enic_remove(struct enic *enic)
1215 {
1216         enic_dev_deinit(enic);
1217         vnic_dev_close(enic->vdev);
1218         vnic_dev_unregister(enic->vdev);
1219 }