1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright 2019 Mellanox Technologies, Ltd 3 */ 4 #include <unistd.h> 5 #include <net/if.h> 6 #include <sys/socket.h> 7 #include <sys/ioctl.h> 8 #include <fcntl.h> 9 #include <netinet/in.h> 10 11 #include <rte_malloc.h> 12 #include <rte_log.h> 13 #include <rte_errno.h> 14 #include <rte_pci.h> 15 #include <rte_string_fns.h> 16 17 #include <mlx5_glue.h> 18 #include <mlx5_common.h> 19 #include <mlx5_common_pci.h> 20 #include <mlx5_devx_cmds.h> 21 #include <mlx5_prm.h> 22 #include <mlx5_nl.h> 23 24 #include "mlx5_vdpa_utils.h" 25 #include "mlx5_vdpa.h" 26 27 28 #define MLX5_VDPA_DEFAULT_FEATURES ((1ULL << VHOST_USER_F_PROTOCOL_FEATURES) | \ 29 (1ULL << VIRTIO_F_ANY_LAYOUT) | \ 30 (1ULL << VIRTIO_NET_F_MQ) | \ 31 (1ULL << VIRTIO_NET_F_GUEST_ANNOUNCE) | \ 32 (1ULL << VIRTIO_F_ORDER_PLATFORM) | \ 33 (1ULL << VHOST_F_LOG_ALL) | \ 34 (1ULL << VIRTIO_NET_F_MTU)) 35 36 #define MLX5_VDPA_PROTOCOL_FEATURES \ 37 ((1ULL << VHOST_USER_PROTOCOL_F_SLAVE_REQ) | \ 38 (1ULL << VHOST_USER_PROTOCOL_F_SLAVE_SEND_FD) | \ 39 (1ULL << VHOST_USER_PROTOCOL_F_HOST_NOTIFIER) | \ 40 (1ULL << VHOST_USER_PROTOCOL_F_LOG_SHMFD) | \ 41 (1ULL << VHOST_USER_PROTOCOL_F_MQ) | \ 42 (1ULL << VHOST_USER_PROTOCOL_F_NET_MTU) | \ 43 (1ULL << VHOST_USER_PROTOCOL_F_STATUS)) 44 45 #define MLX5_VDPA_MAX_RETRIES 20 46 #define MLX5_VDPA_USEC 1000 47 #define MLX5_VDPA_DEFAULT_NO_TRAFFIC_TIME_S 2LLU 48 49 TAILQ_HEAD(mlx5_vdpa_privs, mlx5_vdpa_priv) priv_list = 50 TAILQ_HEAD_INITIALIZER(priv_list); 51 static pthread_mutex_t priv_list_lock = PTHREAD_MUTEX_INITIALIZER; 52 53 static struct mlx5_vdpa_priv * 54 mlx5_vdpa_find_priv_resource_by_vdev(struct rte_vdpa_device *vdev) 55 { 56 struct mlx5_vdpa_priv *priv; 57 int found = 0; 58 59 pthread_mutex_lock(&priv_list_lock); 60 TAILQ_FOREACH(priv, &priv_list, next) { 61 if (vdev == priv->vdev) { 62 found = 1; 63 break; 64 } 65 } 66 pthread_mutex_unlock(&priv_list_lock); 67 if (!found) { 68 DRV_LOG(ERR, "Invalid vDPA device: %s.", vdev->device->name); 69 rte_errno = EINVAL; 70 return NULL; 71 } 72 return priv; 73 } 74 75 static int 76 mlx5_vdpa_get_queue_num(struct rte_vdpa_device *vdev, uint32_t *queue_num) 77 { 78 struct mlx5_vdpa_priv *priv = 79 mlx5_vdpa_find_priv_resource_by_vdev(vdev); 80 81 if (priv == NULL) { 82 DRV_LOG(ERR, "Invalid vDPA device: %s.", vdev->device->name); 83 return -1; 84 } 85 *queue_num = priv->caps.max_num_virtio_queues; 86 return 0; 87 } 88 89 static int 90 mlx5_vdpa_get_vdpa_features(struct rte_vdpa_device *vdev, uint64_t *features) 91 { 92 struct mlx5_vdpa_priv *priv = 93 mlx5_vdpa_find_priv_resource_by_vdev(vdev); 94 95 if (priv == NULL) { 96 DRV_LOG(ERR, "Invalid vDPA device: %s.", vdev->device->name); 97 return -1; 98 } 99 *features = MLX5_VDPA_DEFAULT_FEATURES; 100 if (priv->caps.virtio_queue_type & (1 << MLX5_VIRTQ_TYPE_PACKED)) 101 *features |= (1ULL << VIRTIO_F_RING_PACKED); 102 if (priv->caps.tso_ipv4) 103 *features |= (1ULL << VIRTIO_NET_F_HOST_TSO4); 104 if (priv->caps.tso_ipv6) 105 *features |= (1ULL << VIRTIO_NET_F_HOST_TSO6); 106 if (priv->caps.tx_csum) 107 *features |= (1ULL << VIRTIO_NET_F_CSUM); 108 if (priv->caps.rx_csum) 109 *features |= (1ULL << VIRTIO_NET_F_GUEST_CSUM); 110 if (priv->caps.virtio_version_1_0) 111 *features |= (1ULL << VIRTIO_F_VERSION_1); 112 return 0; 113 } 114 115 static int 116 mlx5_vdpa_get_protocol_features(struct rte_vdpa_device *vdev, 117 uint64_t *features) 118 { 119 struct mlx5_vdpa_priv *priv = 120 mlx5_vdpa_find_priv_resource_by_vdev(vdev); 121 122 if (priv == NULL) { 123 DRV_LOG(ERR, "Invalid vDPA device: %s.", vdev->device->name); 124 return -1; 125 } 126 *features = MLX5_VDPA_PROTOCOL_FEATURES; 127 return 0; 128 } 129 130 static int 131 mlx5_vdpa_set_vring_state(int vid, int vring, int state) 132 { 133 struct rte_vdpa_device *vdev = rte_vhost_get_vdpa_device(vid); 134 struct mlx5_vdpa_priv *priv = 135 mlx5_vdpa_find_priv_resource_by_vdev(vdev); 136 int ret; 137 138 if (priv == NULL) { 139 DRV_LOG(ERR, "Invalid vDPA device: %s.", vdev->device->name); 140 return -EINVAL; 141 } 142 if (vring >= (int)priv->caps.max_num_virtio_queues * 2) { 143 DRV_LOG(ERR, "Too big vring id: %d.", vring); 144 return -E2BIG; 145 } 146 pthread_mutex_lock(&priv->vq_config_lock); 147 ret = mlx5_vdpa_virtq_enable(priv, vring, state); 148 pthread_mutex_unlock(&priv->vq_config_lock); 149 return ret; 150 } 151 152 static int 153 mlx5_vdpa_features_set(int vid) 154 { 155 struct rte_vdpa_device *vdev = rte_vhost_get_vdpa_device(vid); 156 struct mlx5_vdpa_priv *priv = 157 mlx5_vdpa_find_priv_resource_by_vdev(vdev); 158 uint64_t log_base, log_size; 159 uint64_t features; 160 int ret; 161 162 if (priv == NULL) { 163 DRV_LOG(ERR, "Invalid vDPA device: %s.", vdev->device->name); 164 return -EINVAL; 165 } 166 ret = rte_vhost_get_negotiated_features(vid, &features); 167 if (ret) { 168 DRV_LOG(ERR, "Failed to get negotiated features."); 169 return ret; 170 } 171 if (RTE_VHOST_NEED_LOG(features)) { 172 ret = rte_vhost_get_log_base(vid, &log_base, &log_size); 173 if (ret) { 174 DRV_LOG(ERR, "Failed to get log base."); 175 return ret; 176 } 177 ret = mlx5_vdpa_dirty_bitmap_set(priv, log_base, log_size); 178 if (ret) { 179 DRV_LOG(ERR, "Failed to set dirty bitmap."); 180 return ret; 181 } 182 DRV_LOG(INFO, "mlx5 vdpa: enabling dirty logging..."); 183 ret = mlx5_vdpa_logging_enable(priv, 1); 184 if (ret) { 185 DRV_LOG(ERR, "Failed t enable dirty logging."); 186 return ret; 187 } 188 } 189 return 0; 190 } 191 192 static int 193 mlx5_vdpa_pd_create(struct mlx5_vdpa_priv *priv) 194 { 195 #ifdef HAVE_IBV_FLOW_DV_SUPPORT 196 priv->pd = mlx5_glue->alloc_pd(priv->ctx); 197 if (priv->pd == NULL) { 198 DRV_LOG(ERR, "Failed to allocate PD."); 199 return errno ? -errno : -ENOMEM; 200 } 201 struct mlx5dv_obj obj; 202 struct mlx5dv_pd pd_info; 203 int ret = 0; 204 205 obj.pd.in = priv->pd; 206 obj.pd.out = &pd_info; 207 ret = mlx5_glue->dv_init_obj(&obj, MLX5DV_OBJ_PD); 208 if (ret) { 209 DRV_LOG(ERR, "Fail to get PD object info."); 210 mlx5_glue->dealloc_pd(priv->pd); 211 priv->pd = NULL; 212 return -errno; 213 } 214 priv->pdn = pd_info.pdn; 215 return 0; 216 #else 217 (void)priv; 218 DRV_LOG(ERR, "Cannot get pdn - no DV support."); 219 return -ENOTSUP; 220 #endif /* HAVE_IBV_FLOW_DV_SUPPORT */ 221 } 222 223 static int 224 mlx5_vdpa_mtu_set(struct mlx5_vdpa_priv *priv) 225 { 226 struct ifreq request; 227 uint16_t vhost_mtu = 0; 228 uint16_t kern_mtu = 0; 229 int ret = rte_vhost_get_mtu(priv->vid, &vhost_mtu); 230 int sock; 231 int retries = MLX5_VDPA_MAX_RETRIES; 232 233 if (ret) { 234 DRV_LOG(DEBUG, "Cannot get vhost MTU - %d.", ret); 235 return ret; 236 } 237 if (!vhost_mtu) { 238 DRV_LOG(DEBUG, "Vhost MTU is 0."); 239 return ret; 240 } 241 ret = mlx5_get_ifname_sysfs(priv->ctx->device->ibdev_path, 242 request.ifr_name); 243 if (ret) { 244 DRV_LOG(DEBUG, "Cannot get kernel IF name - %d.", ret); 245 return ret; 246 } 247 sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP); 248 if (sock == -1) { 249 DRV_LOG(DEBUG, "Cannot open IF socket."); 250 return sock; 251 } 252 while (retries--) { 253 ret = ioctl(sock, SIOCGIFMTU, &request); 254 if (ret == -1) 255 break; 256 kern_mtu = request.ifr_mtu; 257 DRV_LOG(DEBUG, "MTU: current %d requested %d.", (int)kern_mtu, 258 (int)vhost_mtu); 259 if (kern_mtu == vhost_mtu) 260 break; 261 request.ifr_mtu = vhost_mtu; 262 ret = ioctl(sock, SIOCSIFMTU, &request); 263 if (ret == -1) 264 break; 265 request.ifr_mtu = 0; 266 usleep(MLX5_VDPA_USEC); 267 } 268 close(sock); 269 return kern_mtu == vhost_mtu ? 0 : -1; 270 } 271 272 static int 273 mlx5_vdpa_dev_close(int vid) 274 { 275 struct rte_vdpa_device *vdev = rte_vhost_get_vdpa_device(vid); 276 struct mlx5_vdpa_priv *priv = 277 mlx5_vdpa_find_priv_resource_by_vdev(vdev); 278 int ret = 0; 279 280 if (priv == NULL) { 281 DRV_LOG(ERR, "Invalid vDPA device: %s.", vdev->device->name); 282 return -1; 283 } 284 if (priv->configured) 285 ret |= mlx5_vdpa_lm_log(priv); 286 mlx5_vdpa_err_event_unset(priv); 287 mlx5_vdpa_cqe_event_unset(priv); 288 mlx5_vdpa_steer_unset(priv); 289 mlx5_vdpa_virtqs_release(priv); 290 mlx5_vdpa_event_qp_global_release(priv); 291 mlx5_vdpa_mem_dereg(priv); 292 if (priv->pd) { 293 claim_zero(mlx5_glue->dealloc_pd(priv->pd)); 294 priv->pd = NULL; 295 } 296 priv->configured = 0; 297 priv->vid = 0; 298 /* The mutex may stay locked after event thread cancel - initiate it. */ 299 pthread_mutex_init(&priv->vq_config_lock, NULL); 300 DRV_LOG(INFO, "vDPA device %d was closed.", vid); 301 return ret; 302 } 303 304 static int 305 mlx5_vdpa_dev_config(int vid) 306 { 307 struct rte_vdpa_device *vdev = rte_vhost_get_vdpa_device(vid); 308 struct mlx5_vdpa_priv *priv = 309 mlx5_vdpa_find_priv_resource_by_vdev(vdev); 310 311 if (priv == NULL) { 312 DRV_LOG(ERR, "Invalid vDPA device: %s.", vdev->device->name); 313 return -EINVAL; 314 } 315 if (priv->configured && mlx5_vdpa_dev_close(vid)) { 316 DRV_LOG(ERR, "Failed to reconfigure vid %d.", vid); 317 return -1; 318 } 319 priv->vid = vid; 320 if (mlx5_vdpa_mtu_set(priv)) 321 DRV_LOG(WARNING, "MTU cannot be set on device %s.", 322 vdev->device->name); 323 if (mlx5_vdpa_pd_create(priv) || mlx5_vdpa_mem_register(priv) || 324 mlx5_vdpa_err_event_setup(priv) || 325 mlx5_vdpa_virtqs_prepare(priv) || mlx5_vdpa_steer_setup(priv) || 326 mlx5_vdpa_cqe_event_setup(priv)) { 327 mlx5_vdpa_dev_close(vid); 328 return -1; 329 } 330 priv->configured = 1; 331 DRV_LOG(INFO, "vDPA device %d was configured.", vid); 332 return 0; 333 } 334 335 static int 336 mlx5_vdpa_get_device_fd(int vid) 337 { 338 struct rte_vdpa_device *vdev = rte_vhost_get_vdpa_device(vid); 339 struct mlx5_vdpa_priv *priv = 340 mlx5_vdpa_find_priv_resource_by_vdev(vdev); 341 342 if (priv == NULL) { 343 DRV_LOG(ERR, "Invalid vDPA device: %s.", vdev->device->name); 344 return -EINVAL; 345 } 346 return priv->ctx->cmd_fd; 347 } 348 349 static int 350 mlx5_vdpa_get_notify_area(int vid, int qid, uint64_t *offset, uint64_t *size) 351 { 352 struct rte_vdpa_device *vdev = rte_vhost_get_vdpa_device(vid); 353 struct mlx5_vdpa_priv *priv = 354 mlx5_vdpa_find_priv_resource_by_vdev(vdev); 355 356 RTE_SET_USED(qid); 357 if (priv == NULL) { 358 DRV_LOG(ERR, "Invalid vDPA device: %s.", vdev->device->name); 359 return -EINVAL; 360 } 361 if (!priv->var) { 362 DRV_LOG(ERR, "VAR was not created for device %s, is the device" 363 " configured?.", vdev->device->name); 364 return -EINVAL; 365 } 366 *offset = priv->var->mmap_off; 367 *size = priv->var->length; 368 return 0; 369 } 370 371 static int 372 mlx5_vdpa_get_stats_names(struct rte_vdpa_device *vdev, 373 struct rte_vdpa_stat_name *stats_names, 374 unsigned int size) 375 { 376 static const char *mlx5_vdpa_stats_names[MLX5_VDPA_STATS_MAX] = { 377 "received_descriptors", 378 "completed_descriptors", 379 "bad descriptor errors", 380 "exceed max chain", 381 "invalid buffer", 382 "completion errors", 383 }; 384 struct mlx5_vdpa_priv *priv = 385 mlx5_vdpa_find_priv_resource_by_vdev(vdev); 386 unsigned int i; 387 388 if (priv == NULL) { 389 DRV_LOG(ERR, "Invalid device: %s.", vdev->device->name); 390 return -ENODEV; 391 } 392 if (!stats_names) 393 return MLX5_VDPA_STATS_MAX; 394 size = RTE_MIN(size, (unsigned int)MLX5_VDPA_STATS_MAX); 395 for (i = 0; i < size; ++i) 396 strlcpy(stats_names[i].name, mlx5_vdpa_stats_names[i], 397 RTE_VDPA_STATS_NAME_SIZE); 398 return size; 399 } 400 401 static int 402 mlx5_vdpa_get_stats(struct rte_vdpa_device *vdev, int qid, 403 struct rte_vdpa_stat *stats, unsigned int n) 404 { 405 struct mlx5_vdpa_priv *priv = 406 mlx5_vdpa_find_priv_resource_by_vdev(vdev); 407 408 if (priv == NULL) { 409 DRV_LOG(ERR, "Invalid device: %s.", vdev->device->name); 410 return -ENODEV; 411 } 412 if (!priv->configured) { 413 DRV_LOG(ERR, "Device %s was not configured.", 414 vdev->device->name); 415 return -ENODATA; 416 } 417 if (qid >= (int)priv->nr_virtqs) { 418 DRV_LOG(ERR, "Too big vring id: %d for device %s.", qid, 419 vdev->device->name); 420 return -E2BIG; 421 } 422 if (!priv->caps.queue_counters_valid) { 423 DRV_LOG(ERR, "Virtq statistics is not supported for device %s.", 424 vdev->device->name); 425 return -ENOTSUP; 426 } 427 return mlx5_vdpa_virtq_stats_get(priv, qid, stats, n); 428 } 429 430 static int 431 mlx5_vdpa_reset_stats(struct rte_vdpa_device *vdev, int qid) 432 { 433 struct mlx5_vdpa_priv *priv = 434 mlx5_vdpa_find_priv_resource_by_vdev(vdev); 435 436 if (priv == NULL) { 437 DRV_LOG(ERR, "Invalid device: %s.", vdev->device->name); 438 return -ENODEV; 439 } 440 if (!priv->configured) { 441 DRV_LOG(ERR, "Device %s was not configured.", 442 vdev->device->name); 443 return -ENODATA; 444 } 445 if (qid >= (int)priv->nr_virtqs) { 446 DRV_LOG(ERR, "Too big vring id: %d for device %s.", qid, 447 vdev->device->name); 448 return -E2BIG; 449 } 450 if (!priv->caps.queue_counters_valid) { 451 DRV_LOG(ERR, "Virtq statistics is not supported for device %s.", 452 vdev->device->name); 453 return -ENOTSUP; 454 } 455 return mlx5_vdpa_virtq_stats_reset(priv, qid); 456 } 457 458 static struct rte_vdpa_dev_ops mlx5_vdpa_ops = { 459 .get_queue_num = mlx5_vdpa_get_queue_num, 460 .get_features = mlx5_vdpa_get_vdpa_features, 461 .get_protocol_features = mlx5_vdpa_get_protocol_features, 462 .dev_conf = mlx5_vdpa_dev_config, 463 .dev_close = mlx5_vdpa_dev_close, 464 .set_vring_state = mlx5_vdpa_set_vring_state, 465 .set_features = mlx5_vdpa_features_set, 466 .migration_done = NULL, 467 .get_vfio_group_fd = NULL, 468 .get_vfio_device_fd = mlx5_vdpa_get_device_fd, 469 .get_notify_area = mlx5_vdpa_get_notify_area, 470 .get_stats_names = mlx5_vdpa_get_stats_names, 471 .get_stats = mlx5_vdpa_get_stats, 472 .reset_stats = mlx5_vdpa_reset_stats, 473 }; 474 475 static struct ibv_device * 476 mlx5_vdpa_get_ib_device_match(struct rte_pci_addr *addr) 477 { 478 int n; 479 struct ibv_device **ibv_list = mlx5_glue->get_device_list(&n); 480 struct ibv_device *ibv_match = NULL; 481 482 if (!ibv_list) { 483 rte_errno = ENOSYS; 484 return NULL; 485 } 486 while (n-- > 0) { 487 struct rte_pci_addr pci_addr; 488 489 DRV_LOG(DEBUG, "Checking device \"%s\"..", ibv_list[n]->name); 490 if (mlx5_dev_to_pci_addr(ibv_list[n]->ibdev_path, &pci_addr)) 491 continue; 492 if (rte_pci_addr_cmp(addr, &pci_addr)) 493 continue; 494 ibv_match = ibv_list[n]; 495 break; 496 } 497 if (!ibv_match) 498 rte_errno = ENOENT; 499 mlx5_glue->free_device_list(ibv_list); 500 return ibv_match; 501 } 502 503 /* Try to disable ROCE by Netlink\Devlink. */ 504 static int 505 mlx5_vdpa_nl_roce_disable(const char *addr) 506 { 507 int nlsk_fd = mlx5_nl_init(NETLINK_GENERIC); 508 int devlink_id; 509 int enable; 510 int ret; 511 512 if (nlsk_fd < 0) 513 return nlsk_fd; 514 devlink_id = mlx5_nl_devlink_family_id_get(nlsk_fd); 515 if (devlink_id < 0) { 516 ret = devlink_id; 517 DRV_LOG(DEBUG, "Failed to get devlink id for ROCE operations by" 518 " Netlink."); 519 goto close; 520 } 521 ret = mlx5_nl_enable_roce_get(nlsk_fd, devlink_id, addr, &enable); 522 if (ret) { 523 DRV_LOG(DEBUG, "Failed to get ROCE enable by Netlink: %d.", 524 ret); 525 goto close; 526 } else if (!enable) { 527 DRV_LOG(INFO, "ROCE has already disabled(Netlink)."); 528 goto close; 529 } 530 ret = mlx5_nl_enable_roce_set(nlsk_fd, devlink_id, addr, 0); 531 if (ret) 532 DRV_LOG(DEBUG, "Failed to disable ROCE by Netlink: %d.", ret); 533 else 534 DRV_LOG(INFO, "ROCE is disabled by Netlink successfully."); 535 close: 536 close(nlsk_fd); 537 return ret; 538 } 539 540 /* Try to disable ROCE by sysfs. */ 541 static int 542 mlx5_vdpa_sys_roce_disable(const char *addr) 543 { 544 FILE *file_o; 545 int enable; 546 int ret; 547 548 MKSTR(file_p, "/sys/bus/pci/devices/%s/roce_enable", addr); 549 file_o = fopen(file_p, "rb"); 550 if (!file_o) { 551 rte_errno = ENOTSUP; 552 return -ENOTSUP; 553 } 554 ret = fscanf(file_o, "%d", &enable); 555 if (ret != 1) { 556 rte_errno = EINVAL; 557 ret = EINVAL; 558 goto close; 559 } else if (!enable) { 560 ret = 0; 561 DRV_LOG(INFO, "ROCE has already disabled(sysfs)."); 562 goto close; 563 } 564 fclose(file_o); 565 file_o = fopen(file_p, "wb"); 566 if (!file_o) { 567 rte_errno = ENOTSUP; 568 return -ENOTSUP; 569 } 570 fprintf(file_o, "0\n"); 571 ret = 0; 572 close: 573 if (ret) 574 DRV_LOG(DEBUG, "Failed to disable ROCE by sysfs: %d.", ret); 575 else 576 DRV_LOG(INFO, "ROCE is disabled by sysfs successfully."); 577 fclose(file_o); 578 return ret; 579 } 580 581 static int 582 mlx5_vdpa_roce_disable(struct rte_pci_addr *addr, struct ibv_device **ibv) 583 { 584 char addr_name[64] = {0}; 585 586 rte_pci_device_name(addr, addr_name, sizeof(addr_name)); 587 /* Firstly try to disable ROCE by Netlink and fallback to sysfs. */ 588 if (mlx5_vdpa_nl_roce_disable(addr_name) == 0 || 589 mlx5_vdpa_sys_roce_disable(addr_name) == 0) { 590 /* 591 * Succeed to disable ROCE, wait for the IB device to appear 592 * again after reload. 593 */ 594 int r; 595 struct ibv_device *ibv_new; 596 597 for (r = MLX5_VDPA_MAX_RETRIES; r; r--) { 598 ibv_new = mlx5_vdpa_get_ib_device_match(addr); 599 if (ibv_new) { 600 *ibv = ibv_new; 601 return 0; 602 } 603 usleep(MLX5_VDPA_USEC); 604 } 605 DRV_LOG(ERR, "Cannot much device %s after ROCE disable, " 606 "retries exceed %d", addr_name, MLX5_VDPA_MAX_RETRIES); 607 rte_errno = EAGAIN; 608 } 609 return -rte_errno; 610 } 611 612 static int 613 mlx5_vdpa_args_check_handler(const char *key, const char *val, void *opaque) 614 { 615 struct mlx5_vdpa_priv *priv = opaque; 616 unsigned long tmp; 617 int n_cores = sysconf(_SC_NPROCESSORS_ONLN); 618 619 if (strcmp(key, "class") == 0) 620 return 0; 621 errno = 0; 622 tmp = strtoul(val, NULL, 0); 623 if (errno) { 624 DRV_LOG(WARNING, "%s: \"%s\" is an invalid integer.", key, val); 625 return -errno; 626 } 627 if (strcmp(key, "event_mode") == 0) { 628 if (tmp <= MLX5_VDPA_EVENT_MODE_ONLY_INTERRUPT) 629 priv->event_mode = (int)tmp; 630 else 631 DRV_LOG(WARNING, "Invalid event_mode %s.", val); 632 } else if (strcmp(key, "event_us") == 0) { 633 priv->event_us = (uint32_t)tmp; 634 } else if (strcmp(key, "no_traffic_time") == 0) { 635 priv->no_traffic_time_s = (uint32_t)tmp; 636 } else if (strcmp(key, "event_core") == 0) { 637 if (tmp >= (unsigned long)n_cores) 638 DRV_LOG(WARNING, "Invalid event_core %s.", val); 639 else 640 priv->event_core = tmp; 641 } else if (strcmp(key, "hw_latency_mode") == 0) { 642 priv->hw_latency_mode = (uint32_t)tmp; 643 } else if (strcmp(key, "hw_max_latency_us") == 0) { 644 priv->hw_max_latency_us = (uint32_t)tmp; 645 } else if (strcmp(key, "hw_max_pending_comp") == 0) { 646 priv->hw_max_pending_comp = (uint32_t)tmp; 647 } else { 648 DRV_LOG(WARNING, "Invalid key %s.", key); 649 } 650 return 0; 651 } 652 653 static void 654 mlx5_vdpa_config_get(struct rte_devargs *devargs, struct mlx5_vdpa_priv *priv) 655 { 656 struct rte_kvargs *kvlist; 657 658 priv->event_mode = MLX5_VDPA_EVENT_MODE_FIXED_TIMER; 659 priv->event_us = 0; 660 priv->event_core = -1; 661 priv->no_traffic_time_s = MLX5_VDPA_DEFAULT_NO_TRAFFIC_TIME_S; 662 if (devargs == NULL) 663 return; 664 kvlist = rte_kvargs_parse(devargs->args, NULL); 665 if (kvlist == NULL) 666 return; 667 rte_kvargs_process(kvlist, NULL, mlx5_vdpa_args_check_handler, priv); 668 rte_kvargs_free(kvlist); 669 if (!priv->event_us && 670 priv->event_mode == MLX5_VDPA_EVENT_MODE_DYNAMIC_TIMER) 671 priv->event_us = MLX5_VDPA_DEFAULT_TIMER_STEP_US; 672 DRV_LOG(DEBUG, "event mode is %d.", priv->event_mode); 673 DRV_LOG(DEBUG, "event_us is %u us.", priv->event_us); 674 DRV_LOG(DEBUG, "no traffic time is %u s.", priv->no_traffic_time_s); 675 } 676 677 /** 678 * DPDK callback to register a mlx5 PCI device. 679 * 680 * This function spawns vdpa device out of a given PCI device. 681 * 682 * @param[in] pci_drv 683 * PCI driver structure (mlx5_vpda_driver). 684 * @param[in] pci_dev 685 * PCI device information. 686 * 687 * @return 688 * 0 on success, 1 to skip this driver, a negative errno value otherwise 689 * and rte_errno is set. 690 */ 691 static int 692 mlx5_vdpa_pci_probe(struct rte_pci_driver *pci_drv __rte_unused, 693 struct rte_pci_device *pci_dev __rte_unused) 694 { 695 struct ibv_device *ibv; 696 struct mlx5_vdpa_priv *priv = NULL; 697 struct ibv_context *ctx = NULL; 698 struct mlx5_hca_attr attr; 699 int ret; 700 701 ibv = mlx5_vdpa_get_ib_device_match(&pci_dev->addr); 702 if (!ibv) { 703 DRV_LOG(ERR, "No matching IB device for PCI slot " 704 PCI_PRI_FMT ".", pci_dev->addr.domain, 705 pci_dev->addr.bus, pci_dev->addr.devid, 706 pci_dev->addr.function); 707 return -rte_errno; 708 } else { 709 DRV_LOG(INFO, "PCI information matches for device \"%s\".", 710 ibv->name); 711 } 712 if (mlx5_vdpa_roce_disable(&pci_dev->addr, &ibv) != 0) { 713 DRV_LOG(WARNING, "Failed to disable ROCE for \"%s\".", 714 ibv->name); 715 return -rte_errno; 716 } 717 ctx = mlx5_glue->dv_open_device(ibv); 718 if (!ctx) { 719 DRV_LOG(ERR, "Failed to open IB device \"%s\".", ibv->name); 720 rte_errno = ENODEV; 721 return -rte_errno; 722 } 723 ret = mlx5_devx_cmd_query_hca_attr(ctx, &attr); 724 if (ret) { 725 DRV_LOG(ERR, "Unable to read HCA capabilities."); 726 rte_errno = ENOTSUP; 727 goto error; 728 } else if (!attr.vdpa.valid || !attr.vdpa.max_num_virtio_queues) { 729 DRV_LOG(ERR, "Not enough capabilities to support vdpa, maybe " 730 "old FW/OFED version?"); 731 rte_errno = ENOTSUP; 732 goto error; 733 } 734 if (!attr.vdpa.queue_counters_valid) 735 DRV_LOG(DEBUG, "No capability to support virtq statistics."); 736 priv = rte_zmalloc("mlx5 vDPA device private", sizeof(*priv) + 737 sizeof(struct mlx5_vdpa_virtq) * 738 attr.vdpa.max_num_virtio_queues * 2, 739 RTE_CACHE_LINE_SIZE); 740 if (!priv) { 741 DRV_LOG(ERR, "Failed to allocate private memory."); 742 rte_errno = ENOMEM; 743 goto error; 744 } 745 priv->caps = attr.vdpa; 746 priv->log_max_rqt_size = attr.log_max_rqt_size; 747 priv->num_lag_ports = attr.num_lag_ports; 748 priv->qp_ts_format = attr.qp_ts_format; 749 if (attr.num_lag_ports == 0) 750 priv->num_lag_ports = 1; 751 priv->ctx = ctx; 752 priv->pci_dev = pci_dev; 753 priv->var = mlx5_glue->dv_alloc_var(ctx, 0); 754 if (!priv->var) { 755 DRV_LOG(ERR, "Failed to allocate VAR %u.", errno); 756 goto error; 757 } 758 priv->vdev = rte_vdpa_register_device(&pci_dev->device, 759 &mlx5_vdpa_ops); 760 if (priv->vdev == NULL) { 761 DRV_LOG(ERR, "Failed to register vDPA device."); 762 rte_errno = rte_errno ? rte_errno : EINVAL; 763 goto error; 764 } 765 mlx5_vdpa_config_get(pci_dev->device.devargs, priv); 766 SLIST_INIT(&priv->mr_list); 767 pthread_mutex_init(&priv->vq_config_lock, NULL); 768 pthread_mutex_lock(&priv_list_lock); 769 TAILQ_INSERT_TAIL(&priv_list, priv, next); 770 pthread_mutex_unlock(&priv_list_lock); 771 return 0; 772 773 error: 774 if (priv) { 775 if (priv->var) 776 mlx5_glue->dv_free_var(priv->var); 777 rte_free(priv); 778 } 779 if (ctx) 780 mlx5_glue->close_device(ctx); 781 return -rte_errno; 782 } 783 784 /** 785 * DPDK callback to remove a PCI device. 786 * 787 * This function removes all vDPA devices belong to a given PCI device. 788 * 789 * @param[in] pci_dev 790 * Pointer to the PCI device. 791 * 792 * @return 793 * 0 on success, the function cannot fail. 794 */ 795 static int 796 mlx5_vdpa_pci_remove(struct rte_pci_device *pci_dev) 797 { 798 struct mlx5_vdpa_priv *priv = NULL; 799 int found = 0; 800 801 pthread_mutex_lock(&priv_list_lock); 802 TAILQ_FOREACH(priv, &priv_list, next) { 803 if (!rte_pci_addr_cmp(&priv->pci_dev->addr, &pci_dev->addr)) { 804 found = 1; 805 break; 806 } 807 } 808 if (found) 809 TAILQ_REMOVE(&priv_list, priv, next); 810 pthread_mutex_unlock(&priv_list_lock); 811 if (found) { 812 if (priv->configured) 813 mlx5_vdpa_dev_close(priv->vid); 814 if (priv->var) { 815 mlx5_glue->dv_free_var(priv->var); 816 priv->var = NULL; 817 } 818 mlx5_glue->close_device(priv->ctx); 819 pthread_mutex_destroy(&priv->vq_config_lock); 820 rte_free(priv); 821 } 822 return 0; 823 } 824 825 static const struct rte_pci_id mlx5_vdpa_pci_id_map[] = { 826 { 827 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX, 828 PCI_DEVICE_ID_MELLANOX_CONNECTX6) 829 }, 830 { 831 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX, 832 PCI_DEVICE_ID_MELLANOX_CONNECTX6VF) 833 }, 834 { 835 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX, 836 PCI_DEVICE_ID_MELLANOX_CONNECTX6DX) 837 }, 838 { 839 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX, 840 PCI_DEVICE_ID_MELLANOX_CONNECTXVF) 841 }, 842 { 843 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX, 844 PCI_DEVICE_ID_MELLANOX_CONNECTX6DXBF) 845 }, 846 { 847 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX, 848 PCI_DEVICE_ID_MELLANOX_CONNECTX7) 849 }, 850 { 851 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX, 852 PCI_DEVICE_ID_MELLANOX_CONNECTX7BF) 853 }, 854 { 855 .vendor_id = 0 856 } 857 }; 858 859 static struct mlx5_pci_driver mlx5_vdpa_driver = { 860 .driver_class = MLX5_CLASS_VDPA, 861 .pci_driver = { 862 .driver = { 863 .name = "mlx5_vdpa", 864 }, 865 .id_table = mlx5_vdpa_pci_id_map, 866 .probe = mlx5_vdpa_pci_probe, 867 .remove = mlx5_vdpa_pci_remove, 868 .drv_flags = 0, 869 }, 870 }; 871 872 RTE_LOG_REGISTER(mlx5_vdpa_logtype, pmd.vdpa.mlx5, NOTICE) 873 874 /** 875 * Driver initialization routine. 876 */ 877 RTE_INIT(rte_mlx5_vdpa_init) 878 { 879 mlx5_common_init(); 880 if (mlx5_glue) 881 mlx5_pci_driver_register(&mlx5_vdpa_driver); 882 } 883 884 RTE_PMD_EXPORT_NAME(net_mlx5_vdpa, __COUNTER__); 885 RTE_PMD_REGISTER_PCI_TABLE(net_mlx5_vdpa, mlx5_vdpa_pci_id_map); 886 RTE_PMD_REGISTER_KMOD_DEP(net_mlx5_vdpa, "* ib_uverbs & mlx5_core & mlx5_ib"); 887