drivers/vdpa/mlx5/mlx5_vdpa.c

   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_cqe_event_unset(priv);
 287         mlx5_vdpa_steer_unset(priv);
 288         mlx5_vdpa_virtqs_release(priv);
 289         mlx5_vdpa_event_qp_global_release(priv);
 290         mlx5_vdpa_mem_dereg(priv);
 291         if (priv->pd) {
 292                 claim_zero(mlx5_glue->dealloc_pd(priv->pd));
 293                 priv->pd = NULL;
 294         }
 295         priv->configured = 0;
 296         priv->vid = 0;
 297         DRV_LOG(INFO, "vDPA device %d was closed.", vid);
 298         return ret;
 299 }
 300
 301 static int
 302 mlx5_vdpa_dev_config(int vid)
 303 {
 304         struct rte_vdpa_device *vdev = rte_vhost_get_vdpa_device(vid);
 305         struct mlx5_vdpa_priv *priv =
 306                 mlx5_vdpa_find_priv_resource_by_vdev(vdev);
 307
 308         if (priv == NULL) {
 309                 DRV_LOG(ERR, "Invalid vDPA device: %s.", vdev->device->name);
 310                 return -EINVAL;
 311         }
 312         if (priv->configured && mlx5_vdpa_dev_close(vid)) {
 313                 DRV_LOG(ERR, "Failed to reconfigure vid %d.", vid);
 314                 return -1;
 315         }
 316         priv->vid = vid;
 317         if (mlx5_vdpa_mtu_set(priv))
 318                 DRV_LOG(WARNING, "MTU cannot be set on device %s.",
 319                                 vdev->device->name);
 320         if (mlx5_vdpa_pd_create(priv) || mlx5_vdpa_mem_register(priv) ||
 321             mlx5_vdpa_virtqs_prepare(priv) || mlx5_vdpa_steer_setup(priv) ||
 322             mlx5_vdpa_cqe_event_setup(priv)) {
 323                 mlx5_vdpa_dev_close(vid);
 324                 return -1;
 325         }
 326         priv->configured = 1;
 327         DRV_LOG(INFO, "vDPA device %d was configured.", vid);
 328         return 0;
 329 }
 330
 331 static int
 332 mlx5_vdpa_get_device_fd(int vid)
 333 {
 334         struct rte_vdpa_device *vdev = rte_vhost_get_vdpa_device(vid);
 335         struct mlx5_vdpa_priv *priv =
 336                 mlx5_vdpa_find_priv_resource_by_vdev(vdev);
 337
 338         if (priv == NULL) {
 339                 DRV_LOG(ERR, "Invalid vDPA device: %s.", vdev->device->name);
 340                 return -EINVAL;
 341         }
 342         return priv->ctx->cmd_fd;
 343 }
 344
 345 static int
 346 mlx5_vdpa_get_notify_area(int vid, int qid, uint64_t *offset, uint64_t *size)
 347 {
 348         struct rte_vdpa_device *vdev = rte_vhost_get_vdpa_device(vid);
 349         struct mlx5_vdpa_priv *priv =
 350                 mlx5_vdpa_find_priv_resource_by_vdev(vdev);
 351
 352         RTE_SET_USED(qid);
 353         if (priv == NULL) {
 354                 DRV_LOG(ERR, "Invalid vDPA device: %s.", vdev->device->name);
 355                 return -EINVAL;
 356         }
 357         if (!priv->var) {
 358                 DRV_LOG(ERR, "VAR was not created for device %s, is the device"
 359                         " configured?.", vdev->device->name);
 360                 return -EINVAL;
 361         }
 362         *offset = priv->var->mmap_off;
 363         *size = priv->var->length;
 364         return 0;
 365 }
 366
 367 static int
 368 mlx5_vdpa_get_stats_names(struct rte_vdpa_device *vdev,
 369                 struct rte_vdpa_stat_name *stats_names,
 370                 unsigned int size)
 371 {
 372         static const char *mlx5_vdpa_stats_names[MLX5_VDPA_STATS_MAX] = {
 373                 "received_descriptors",
 374                 "completed_descriptors",
 375                 "bad descriptor errors",
 376                 "exceed max chain",
 377                 "invalid buffer",
 378                 "completion errors",
 379         };
 380         struct mlx5_vdpa_priv *priv =
 381                 mlx5_vdpa_find_priv_resource_by_vdev(vdev);
 382         unsigned int i;
 383
 384         if (priv == NULL) {
 385                 DRV_LOG(ERR, "Invalid device: %s.", vdev->device->name);
 386                 return -ENODEV;
 387         }
 388         if (!stats_names)
 389                 return MLX5_VDPA_STATS_MAX;
 390         size = RTE_MIN(size, (unsigned int)MLX5_VDPA_STATS_MAX);
 391         for (i = 0; i < size; ++i)
 392                 strlcpy(stats_names[i].name, mlx5_vdpa_stats_names[i],
 393                         RTE_VDPA_STATS_NAME_SIZE);
 394         return size;
 395 }
 396
 397 static int
 398 mlx5_vdpa_get_stats(struct rte_vdpa_device *vdev, int qid,
 399                 struct rte_vdpa_stat *stats, unsigned int n)
 400 {
 401         struct mlx5_vdpa_priv *priv =
 402                 mlx5_vdpa_find_priv_resource_by_vdev(vdev);
 403
 404         if (priv == NULL) {
 405                 DRV_LOG(ERR, "Invalid device: %s.", vdev->device->name);
 406                 return -ENODEV;
 407         }
 408         if (!priv->configured) {
 409                 DRV_LOG(ERR, "Device %s was not configured.",
 410                                 vdev->device->name);
 411                 return -ENODATA;
 412         }
 413         if (qid >= (int)priv->nr_virtqs) {
 414                 DRV_LOG(ERR, "Too big vring id: %d for device %s.", qid,
 415                                 vdev->device->name);
 416                 return -E2BIG;
 417         }
 418         if (!priv->caps.queue_counters_valid) {
 419                 DRV_LOG(ERR, "Virtq statistics is not supported for device %s.",
 420                         vdev->device->name);
 421                 return -ENOTSUP;
 422         }
 423         return mlx5_vdpa_virtq_stats_get(priv, qid, stats, n);
 424 }
 425
 426 static int
 427 mlx5_vdpa_reset_stats(struct rte_vdpa_device *vdev, int qid)
 428 {
 429         struct mlx5_vdpa_priv *priv =
 430                 mlx5_vdpa_find_priv_resource_by_vdev(vdev);
 431
 432         if (priv == NULL) {
 433                 DRV_LOG(ERR, "Invalid device: %s.", vdev->device->name);
 434                 return -ENODEV;
 435         }
 436         if (!priv->configured) {
 437                 DRV_LOG(ERR, "Device %s was not configured.",
 438                                 vdev->device->name);
 439                 return -ENODATA;
 440         }
 441         if (qid >= (int)priv->nr_virtqs) {
 442                 DRV_LOG(ERR, "Too big vring id: %d for device %s.", qid,
 443                                 vdev->device->name);
 444                 return -E2BIG;
 445         }
 446         if (!priv->caps.queue_counters_valid) {
 447                 DRV_LOG(ERR, "Virtq statistics is not supported for device %s.",
 448                         vdev->device->name);
 449                 return -ENOTSUP;
 450         }
 451         return mlx5_vdpa_virtq_stats_reset(priv, qid);
 452 }
 453
 454 static struct rte_vdpa_dev_ops mlx5_vdpa_ops = {
 455         .get_queue_num = mlx5_vdpa_get_queue_num,
 456         .get_features = mlx5_vdpa_get_vdpa_features,
 457         .get_protocol_features = mlx5_vdpa_get_protocol_features,
 458         .dev_conf = mlx5_vdpa_dev_config,
 459         .dev_close = mlx5_vdpa_dev_close,
 460         .set_vring_state = mlx5_vdpa_set_vring_state,
 461         .set_features = mlx5_vdpa_features_set,
 462         .migration_done = NULL,
 463         .get_vfio_group_fd = NULL,
 464         .get_vfio_device_fd = mlx5_vdpa_get_device_fd,
 465         .get_notify_area = mlx5_vdpa_get_notify_area,
 466         .get_stats_names = mlx5_vdpa_get_stats_names,
 467         .get_stats = mlx5_vdpa_get_stats,
 468         .reset_stats = mlx5_vdpa_reset_stats,
 469 };
 470
 471 static struct ibv_device *
 472 mlx5_vdpa_get_ib_device_match(struct rte_pci_addr *addr)
 473 {
 474         int n;
 475         struct ibv_device **ibv_list = mlx5_glue->get_device_list(&n);
 476         struct ibv_device *ibv_match = NULL;
 477
 478         if (!ibv_list) {
 479                 rte_errno = ENOSYS;
 480                 return NULL;
 481         }
 482         while (n-- > 0) {
 483                 struct rte_pci_addr pci_addr;
 484
 485                 DRV_LOG(DEBUG, "Checking device \"%s\"..", ibv_list[n]->name);
 486                 if (mlx5_dev_to_pci_addr(ibv_list[n]->ibdev_path, &pci_addr))
 487                         continue;
 488                 if (rte_pci_addr_cmp(addr, &pci_addr))
 489                         continue;
 490                 ibv_match = ibv_list[n];
 491                 break;
 492         }
 493         if (!ibv_match)
 494                 rte_errno = ENOENT;
 495         mlx5_glue->free_device_list(ibv_list);
 496         return ibv_match;
 497 }
 498
 499 /* Try to disable ROCE by Netlink\Devlink. */
 500 static int
 501 mlx5_vdpa_nl_roce_disable(const char *addr)
 502 {
 503         int nlsk_fd = mlx5_nl_init(NETLINK_GENERIC);
 504         int devlink_id;
 505         int enable;
 506         int ret;
 507
 508         if (nlsk_fd < 0)
 509                 return nlsk_fd;
 510         devlink_id = mlx5_nl_devlink_family_id_get(nlsk_fd);
 511         if (devlink_id < 0) {
 512                 ret = devlink_id;
 513                 DRV_LOG(DEBUG, "Failed to get devlink id for ROCE operations by"
 514                         " Netlink.");
 515                 goto close;
 516         }
 517         ret = mlx5_nl_enable_roce_get(nlsk_fd, devlink_id, addr, &enable);
 518         if (ret) {
 519                 DRV_LOG(DEBUG, "Failed to get ROCE enable by Netlink: %d.",
 520                         ret);
 521                 goto close;
 522         } else if (!enable) {
 523                 DRV_LOG(INFO, "ROCE has already disabled(Netlink).");
 524                 goto close;
 525         }
 526         ret = mlx5_nl_enable_roce_set(nlsk_fd, devlink_id, addr, 0);
 527         if (ret)
 528                 DRV_LOG(DEBUG, "Failed to disable ROCE by Netlink: %d.", ret);
 529         else
 530                 DRV_LOG(INFO, "ROCE is disabled by Netlink successfully.");
 531 close:
 532         close(nlsk_fd);
 533         return ret;
 534 }
 535
 536 /* Try to disable ROCE by sysfs. */
 537 static int
 538 mlx5_vdpa_sys_roce_disable(const char *addr)
 539 {
 540         FILE *file_o;
 541         int enable;
 542         int ret;
 543
 544         MKSTR(file_p, "/sys/bus/pci/devices/%s/roce_enable", addr);
 545         file_o = fopen(file_p, "rb");
 546         if (!file_o) {
 547                 rte_errno = ENOTSUP;
 548                 return -ENOTSUP;
 549         }
 550         ret = fscanf(file_o, "%d", &enable);
 551         if (ret != 1) {
 552                 rte_errno = EINVAL;
 553                 ret = EINVAL;
 554                 goto close;
 555         } else if (!enable) {
 556                 ret = 0;
 557                 DRV_LOG(INFO, "ROCE has already disabled(sysfs).");
 558                 goto close;
 559         }
 560         fclose(file_o);
 561         file_o = fopen(file_p, "wb");
 562         if (!file_o) {
 563                 rte_errno = ENOTSUP;
 564                 return -ENOTSUP;
 565         }
 566         fprintf(file_o, "0\n");
 567         ret = 0;
 568 close:
 569         if (ret)
 570                 DRV_LOG(DEBUG, "Failed to disable ROCE by sysfs: %d.", ret);
 571         else
 572                 DRV_LOG(INFO, "ROCE is disabled by sysfs successfully.");
 573         fclose(file_o);
 574         return ret;
 575 }
 576
 577 static int
 578 mlx5_vdpa_roce_disable(struct rte_pci_addr *addr, struct ibv_device **ibv)
 579 {
 580         char addr_name[64] = {0};
 581
 582         rte_pci_device_name(addr, addr_name, sizeof(addr_name));
 583         /* Firstly try to disable ROCE by Netlink and fallback to sysfs. */
 584         if (mlx5_vdpa_nl_roce_disable(addr_name) == 0 ||
 585             mlx5_vdpa_sys_roce_disable(addr_name) == 0) {
 586                 /*
 587                  * Succeed to disable ROCE, wait for the IB device to appear
 588                  * again after reload.
 589                  */
 590                 int r;
 591                 struct ibv_device *ibv_new;
 592
 593                 for (r = MLX5_VDPA_MAX_RETRIES; r; r--) {
 594                         ibv_new = mlx5_vdpa_get_ib_device_match(addr);
 595                         if (ibv_new) {
 596                                 *ibv = ibv_new;
 597                                 return 0;
 598                         }
 599                         usleep(MLX5_VDPA_USEC);
 600                 }
 601                 DRV_LOG(ERR, "Cannot much device %s after ROCE disable, "
 602                         "retries exceed %d", addr_name, MLX5_VDPA_MAX_RETRIES);
 603                 rte_errno = EAGAIN;
 604         }
 605         return -rte_errno;
 606 }
 607
 608 static int
 609 mlx5_vdpa_args_check_handler(const char *key, const char *val, void *opaque)
 610 {
 611         struct mlx5_vdpa_priv *priv = opaque;
 612         unsigned long tmp;
 613
 614         if (strcmp(key, "class") == 0)
 615                 return 0;
 616         errno = 0;
 617         tmp = strtoul(val, NULL, 0);
 618         if (errno) {
 619                 DRV_LOG(WARNING, "%s: \"%s\" is an invalid integer.", key, val);
 620                 return -errno;
 621         }
 622         if (strcmp(key, "event_mode") == 0) {
 623                 if (tmp <= MLX5_VDPA_EVENT_MODE_ONLY_INTERRUPT)
 624                         priv->event_mode = (int)tmp;
 625                 else
 626                         DRV_LOG(WARNING, "Invalid event_mode %s.", val);
 627         } else if (strcmp(key, "event_us") == 0) {
 628                 priv->event_us = (uint32_t)tmp;
 629         } else if (strcmp(key, "no_traffic_time") == 0) {
 630                 priv->no_traffic_time_s = (uint32_t)tmp;
 631         } else {
 632                 DRV_LOG(WARNING, "Invalid key %s.", key);
 633         }
 634         return 0;
 635 }
 636
 637 static void
 638 mlx5_vdpa_config_get(struct rte_devargs *devargs, struct mlx5_vdpa_priv *priv)
 639 {
 640         struct rte_kvargs *kvlist;
 641
 642         priv->event_mode = MLX5_VDPA_EVENT_MODE_DYNAMIC_TIMER;
 643         priv->event_us = 0;
 644         priv->no_traffic_time_s = MLX5_VDPA_DEFAULT_NO_TRAFFIC_TIME_S;
 645         if (devargs == NULL)
 646                 return;
 647         kvlist = rte_kvargs_parse(devargs->args, NULL);
 648         if (kvlist == NULL)
 649                 return;
 650         rte_kvargs_process(kvlist, NULL, mlx5_vdpa_args_check_handler, priv);
 651         rte_kvargs_free(kvlist);
 652         if (!priv->event_us) {
 653                 if (priv->event_mode == MLX5_VDPA_EVENT_MODE_DYNAMIC_TIMER)
 654                         priv->event_us = MLX5_VDPA_DEFAULT_TIMER_STEP_US;
 655                 else if (priv->event_mode == MLX5_VDPA_EVENT_MODE_FIXED_TIMER)
 656                         priv->event_us = MLX5_VDPA_DEFAULT_TIMER_DELAY_US;
 657         }
 658         DRV_LOG(DEBUG, "event mode is %d.", priv->event_mode);
 659         DRV_LOG(DEBUG, "event_us is %u us.", priv->event_us);
 660         DRV_LOG(DEBUG, "no traffic time is %u s.", priv->no_traffic_time_s);
 661 }
 662
 663 /**
 664  * DPDK callback to register a mlx5 PCI device.
 665  *
 666  * This function spawns vdpa device out of a given PCI device.
 667  *
 668  * @param[in] pci_drv
 669  *   PCI driver structure (mlx5_vpda_driver).
 670  * @param[in] pci_dev
 671  *   PCI device information.
 672  *
 673  * @return
 674  *   0 on success, 1 to skip this driver, a negative errno value otherwise
 675  *   and rte_errno is set.
 676  */
 677 static int
 678 mlx5_vdpa_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
 679                     struct rte_pci_device *pci_dev __rte_unused)
 680 {
 681         struct ibv_device *ibv;
 682         struct mlx5_vdpa_priv *priv = NULL;
 683         struct ibv_context *ctx = NULL;
 684         struct mlx5_hca_attr attr;
 685         int ret;
 686
 687         ibv = mlx5_vdpa_get_ib_device_match(&pci_dev->addr);
 688         if (!ibv) {
 689                 DRV_LOG(ERR, "No matching IB device for PCI slot "
 690                         PCI_PRI_FMT ".", pci_dev->addr.domain,
 691                         pci_dev->addr.bus, pci_dev->addr.devid,
 692                         pci_dev->addr.function);
 693                 return -rte_errno;
 694         } else {
 695                 DRV_LOG(INFO, "PCI information matches for device \"%s\".",
 696                         ibv->name);
 697         }
 698         if (mlx5_vdpa_roce_disable(&pci_dev->addr, &ibv) != 0) {
 699                 DRV_LOG(WARNING, "Failed to disable ROCE for \"%s\".",
 700                         ibv->name);
 701                 return -rte_errno;
 702         }
 703         ctx = mlx5_glue->dv_open_device(ibv);
 704         if (!ctx) {
 705                 DRV_LOG(ERR, "Failed to open IB device \"%s\".", ibv->name);
 706                 rte_errno = ENODEV;
 707                 return -rte_errno;
 708         }
 709         ret = mlx5_devx_cmd_query_hca_attr(ctx, &attr);
 710         if (ret) {
 711                 DRV_LOG(ERR, "Unable to read HCA capabilities.");
 712                 rte_errno = ENOTSUP;
 713                 goto error;
 714         } else if (!attr.vdpa.valid || !attr.vdpa.max_num_virtio_queues) {
 715                 DRV_LOG(ERR, "Not enough capabilities to support vdpa, maybe "
 716                         "old FW/OFED version?");
 717                 rte_errno = ENOTSUP;
 718                 goto error;
 719         }
 720         if (!attr.vdpa.queue_counters_valid)
 721                 DRV_LOG(DEBUG, "No capability to support virtq statistics.");
 722         priv = rte_zmalloc("mlx5 vDPA device private", sizeof(*priv) +
 723                            sizeof(struct mlx5_vdpa_virtq) *
 724                            attr.vdpa.max_num_virtio_queues * 2,
 725                            RTE_CACHE_LINE_SIZE);
 726         if (!priv) {
 727                 DRV_LOG(ERR, "Failed to allocate private memory.");
 728                 rte_errno = ENOMEM;
 729                 goto error;
 730         }
 731         priv->caps = attr.vdpa;
 732         priv->log_max_rqt_size = attr.log_max_rqt_size;
 733         priv->ctx = ctx;
 734         priv->pci_dev = pci_dev;
 735         priv->var = mlx5_glue->dv_alloc_var(ctx, 0);
 736         if (!priv->var) {
 737                 DRV_LOG(ERR, "Failed to allocate VAR %u.\n", errno);
 738                 goto error;
 739         }
 740         priv->vdev = rte_vdpa_register_device(&pci_dev->device,
 741                         &mlx5_vdpa_ops);
 742         if (priv->vdev == NULL) {
 743                 DRV_LOG(ERR, "Failed to register vDPA device.");
 744                 rte_errno = rte_errno ? rte_errno : EINVAL;
 745                 goto error;
 746         }
 747         mlx5_vdpa_config_get(pci_dev->device.devargs, priv);
 748         SLIST_INIT(&priv->mr_list);
 749         pthread_mutex_init(&priv->vq_config_lock, NULL);
 750         pthread_mutex_lock(&priv_list_lock);
 751         TAILQ_INSERT_TAIL(&priv_list, priv, next);
 752         pthread_mutex_unlock(&priv_list_lock);
 753         return 0;
 754
 755 error:
 756         if (priv) {
 757                 if (priv->var)
 758                         mlx5_glue->dv_free_var(priv->var);
 759                 rte_free(priv);
 760         }
 761         if (ctx)
 762                 mlx5_glue->close_device(ctx);
 763         return -rte_errno;
 764 }
 765
 766 /**
 767  * DPDK callback to remove a PCI device.
 768  *
 769  * This function removes all vDPA devices belong to a given PCI device.
 770  *
 771  * @param[in] pci_dev
 772  *   Pointer to the PCI device.
 773  *
 774  * @return
 775  *   0 on success, the function cannot fail.
 776  */
 777 static int
 778 mlx5_vdpa_pci_remove(struct rte_pci_device *pci_dev)
 779 {
 780         struct mlx5_vdpa_priv *priv = NULL;
 781         int found = 0;
 782
 783         pthread_mutex_lock(&priv_list_lock);
 784         TAILQ_FOREACH(priv, &priv_list, next) {
 785                 if (!rte_pci_addr_cmp(&priv->pci_dev->addr, &pci_dev->addr)) {
 786                         found = 1;
 787                         break;
 788                 }
 789         }
 790         if (found)
 791                 TAILQ_REMOVE(&priv_list, priv, next);
 792         pthread_mutex_unlock(&priv_list_lock);
 793         if (found) {
 794                 if (priv->configured)
 795                         mlx5_vdpa_dev_close(priv->vid);
 796                 if (priv->var) {
 797                         mlx5_glue->dv_free_var(priv->var);
 798                         priv->var = NULL;
 799                 }
 800                 mlx5_glue->close_device(priv->ctx);
 801                 pthread_mutex_destroy(&priv->vq_config_lock);
 802                 rte_free(priv);
 803         }
 804         return 0;
 805 }
 806
 807 static const struct rte_pci_id mlx5_vdpa_pci_id_map[] = {
 808         {
 809                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
 810                                 PCI_DEVICE_ID_MELLANOX_CONNECTX6)
 811         },
 812         {
 813                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
 814                                 PCI_DEVICE_ID_MELLANOX_CONNECTX6VF)
 815         },
 816         {
 817                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
 818                                 PCI_DEVICE_ID_MELLANOX_CONNECTX6DX)
 819         },
 820         {
 821                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
 822                                 PCI_DEVICE_ID_MELLANOX_CONNECTX6DXVF)
 823         },
 824         {
 825                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
 826                                 PCI_DEVICE_ID_MELLANOX_CONNECTX6DXBF)
 827         },
 828         {
 829                 .vendor_id = 0
 830         }
 831 };
 832
 833 static struct mlx5_pci_driver mlx5_vdpa_driver = {
 834         .driver_class = MLX5_CLASS_VDPA,
 835         .pci_driver = {
 836                 .driver = {
 837                         .name = "mlx5_vdpa",
 838                 },
 839                 .id_table = mlx5_vdpa_pci_id_map,
 840                 .probe = mlx5_vdpa_pci_probe,
 841                 .remove = mlx5_vdpa_pci_remove,
 842                 .drv_flags = 0,
 843         },
 844 };
 845
 846 RTE_LOG_REGISTER(mlx5_vdpa_logtype, pmd.vdpa.mlx5, NOTICE)
 847
 848 /**
 849  * Driver initialization routine.
 850  */
 851 RTE_INIT(rte_mlx5_vdpa_init)
 852 {
 853         mlx5_common_init();
 854         if (mlx5_glue)
 855                 mlx5_pci_driver_register(&mlx5_vdpa_driver);
 856 }
 857
 858 RTE_PMD_EXPORT_NAME(net_mlx5_vdpa, __COUNTER__);
 859 RTE_PMD_REGISTER_PCI_TABLE(net_mlx5_vdpa, mlx5_vdpa_pci_id_map);
 860 RTE_PMD_REGISTER_KMOD_DEP(net_mlx5_vdpa, "* ib_uverbs & mlx5_core & mlx5_ib");