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_MAX 16LLU
  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 /* Try to disable ROCE by Netlink\Devlink. */
 476 static int
 477 mlx5_vdpa_nl_roce_disable(const char *addr)
 478 {
 479         int nlsk_fd = mlx5_nl_init(NETLINK_GENERIC);
 480         int devlink_id;
 481         int enable;
 482         int ret;
 483
 484         if (nlsk_fd < 0)
 485                 return nlsk_fd;
 486         devlink_id = mlx5_nl_devlink_family_id_get(nlsk_fd);
 487         if (devlink_id < 0) {
 488                 ret = devlink_id;
 489                 DRV_LOG(DEBUG, "Failed to get devlink id for ROCE operations by"
 490                         " Netlink.");
 491                 goto close;
 492         }
 493         ret = mlx5_nl_enable_roce_get(nlsk_fd, devlink_id, addr, &enable);
 494         if (ret) {
 495                 DRV_LOG(DEBUG, "Failed to get ROCE enable by Netlink: %d.",
 496                         ret);
 497                 goto close;
 498         } else if (!enable) {
 499                 DRV_LOG(INFO, "ROCE has already disabled(Netlink).");
 500                 goto close;
 501         }
 502         ret = mlx5_nl_enable_roce_set(nlsk_fd, devlink_id, addr, 0);
 503         if (ret)
 504                 DRV_LOG(DEBUG, "Failed to disable ROCE by Netlink: %d.", ret);
 505         else
 506                 DRV_LOG(INFO, "ROCE is disabled by Netlink successfully.");
 507 close:
 508         close(nlsk_fd);
 509         return ret;
 510 }
 511
 512 /* Try to disable ROCE by sysfs. */
 513 static int
 514 mlx5_vdpa_sys_roce_disable(const char *addr)
 515 {
 516         FILE *file_o;
 517         int enable;
 518         int ret;
 519
 520         MKSTR(file_p, "/sys/bus/pci/devices/%s/roce_enable", addr);
 521         file_o = fopen(file_p, "rb");
 522         if (!file_o) {
 523                 rte_errno = ENOTSUP;
 524                 return -ENOTSUP;
 525         }
 526         ret = fscanf(file_o, "%d", &enable);
 527         if (ret != 1) {
 528                 rte_errno = EINVAL;
 529                 ret = EINVAL;
 530                 goto close;
 531         } else if (!enable) {
 532                 ret = 0;
 533                 DRV_LOG(INFO, "ROCE has already disabled(sysfs).");
 534                 goto close;
 535         }
 536         fclose(file_o);
 537         file_o = fopen(file_p, "wb");
 538         if (!file_o) {
 539                 rte_errno = ENOTSUP;
 540                 return -ENOTSUP;
 541         }
 542         fprintf(file_o, "0\n");
 543         ret = 0;
 544 close:
 545         if (ret)
 546                 DRV_LOG(DEBUG, "Failed to disable ROCE by sysfs: %d.", ret);
 547         else
 548                 DRV_LOG(INFO, "ROCE is disabled by sysfs successfully.");
 549         fclose(file_o);
 550         return ret;
 551 }
 552
 553 static int
 554 mlx5_vdpa_roce_disable(struct rte_pci_addr *addr, struct ibv_device **ibv)
 555 {
 556         char addr_name[64] = {0};
 557
 558         rte_pci_device_name(addr, addr_name, sizeof(addr_name));
 559         /* Firstly try to disable ROCE by Netlink and fallback to sysfs. */
 560         if (mlx5_vdpa_nl_roce_disable(addr_name) == 0 ||
 561             mlx5_vdpa_sys_roce_disable(addr_name) == 0) {
 562                 /*
 563                  * Succeed to disable ROCE, wait for the IB device to appear
 564                  * again after reload.
 565                  */
 566                 int r;
 567                 struct ibv_device *ibv_new;
 568
 569                 for (r = MLX5_VDPA_MAX_RETRIES; r; r--) {
 570                         ibv_new = mlx5_os_get_ibv_device(addr);
 571                         if (ibv_new) {
 572                                 *ibv = ibv_new;
 573                                 return 0;
 574                         }
 575                         usleep(MLX5_VDPA_USEC);
 576                 }
 577                 DRV_LOG(ERR, "Cannot much device %s after ROCE disable, "
 578                         "retries exceed %d", addr_name, MLX5_VDPA_MAX_RETRIES);
 579                 rte_errno = EAGAIN;
 580         }
 581         return -rte_errno;
 582 }
 583
 584 static int
 585 mlx5_vdpa_args_check_handler(const char *key, const char *val, void *opaque)
 586 {
 587         struct mlx5_vdpa_priv *priv = opaque;
 588         unsigned long tmp;
 589         int n_cores = sysconf(_SC_NPROCESSORS_ONLN);
 590
 591         if (strcmp(key, RTE_DEVARGS_KEY_CLASS) == 0)
 592                 return 0;
 593         errno = 0;
 594         tmp = strtoul(val, NULL, 0);
 595         if (errno) {
 596                 DRV_LOG(WARNING, "%s: \"%s\" is an invalid integer.", key, val);
 597                 return -errno;
 598         }
 599         if (strcmp(key, "event_mode") == 0) {
 600                 if (tmp <= MLX5_VDPA_EVENT_MODE_ONLY_INTERRUPT)
 601                         priv->event_mode = (int)tmp;
 602                 else
 603                         DRV_LOG(WARNING, "Invalid event_mode %s.", val);
 604         } else if (strcmp(key, "event_us") == 0) {
 605                 priv->event_us = (uint32_t)tmp;
 606         } else if (strcmp(key, "no_traffic_time") == 0) {
 607                 priv->no_traffic_max = (uint32_t)tmp;
 608         } else if (strcmp(key, "event_core") == 0) {
 609                 if (tmp >= (unsigned long)n_cores)
 610                         DRV_LOG(WARNING, "Invalid event_core %s.", val);
 611                 else
 612                         priv->event_core = tmp;
 613         } else if (strcmp(key, "hw_latency_mode") == 0) {
 614                 priv->hw_latency_mode = (uint32_t)tmp;
 615         } else if (strcmp(key, "hw_max_latency_us") == 0) {
 616                 priv->hw_max_latency_us = (uint32_t)tmp;
 617         } else if (strcmp(key, "hw_max_pending_comp") == 0) {
 618                 priv->hw_max_pending_comp = (uint32_t)tmp;
 619         } else {
 620                 DRV_LOG(WARNING, "Invalid key %s.", key);
 621         }
 622         return 0;
 623 }
 624
 625 static void
 626 mlx5_vdpa_config_get(struct rte_devargs *devargs, struct mlx5_vdpa_priv *priv)
 627 {
 628         struct rte_kvargs *kvlist;
 629
 630         priv->event_mode = MLX5_VDPA_EVENT_MODE_FIXED_TIMER;
 631         priv->event_us = 0;
 632         priv->event_core = -1;
 633         priv->no_traffic_max = MLX5_VDPA_DEFAULT_NO_TRAFFIC_MAX;
 634         if (devargs == NULL)
 635                 return;
 636         kvlist = rte_kvargs_parse(devargs->args, NULL);
 637         if (kvlist == NULL)
 638                 return;
 639         rte_kvargs_process(kvlist, NULL, mlx5_vdpa_args_check_handler, priv);
 640         rte_kvargs_free(kvlist);
 641         if (!priv->event_us &&
 642             priv->event_mode == MLX5_VDPA_EVENT_MODE_DYNAMIC_TIMER)
 643                 priv->event_us = MLX5_VDPA_DEFAULT_TIMER_STEP_US;
 644         DRV_LOG(DEBUG, "event mode is %d.", priv->event_mode);
 645         DRV_LOG(DEBUG, "event_us is %u us.", priv->event_us);
 646         DRV_LOG(DEBUG, "no traffic max is %u.", priv->no_traffic_max);
 647 }
 648
 649 /**
 650  * DPDK callback to register a mlx5 PCI device.
 651  *
 652  * This function spawns vdpa device out of a given PCI device.
 653  *
 654  * @param[in] pci_drv
 655  *   PCI driver structure (mlx5_vpda_driver).
 656  * @param[in] pci_dev
 657  *   PCI device information.
 658  *
 659  * @return
 660  *   0 on success, 1 to skip this driver, a negative errno value otherwise
 661  *   and rte_errno is set.
 662  */
 663 static int
 664 mlx5_vdpa_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
 665                     struct rte_pci_device *pci_dev __rte_unused)
 666 {
 667         struct ibv_device *ibv;
 668         struct mlx5_vdpa_priv *priv = NULL;
 669         struct ibv_context *ctx = NULL;
 670         struct mlx5_hca_attr attr;
 671         int ret;
 672
 673         ibv = mlx5_os_get_ibv_device(&pci_dev->addr);
 674         if (!ibv) {
 675                 DRV_LOG(ERR, "No matching IB device for PCI slot "
 676                         PCI_PRI_FMT ".", pci_dev->addr.domain,
 677                         pci_dev->addr.bus, pci_dev->addr.devid,
 678                         pci_dev->addr.function);
 679                 return -rte_errno;
 680         } else {
 681                 DRV_LOG(INFO, "PCI information matches for device \"%s\".",
 682                         ibv->name);
 683         }
 684         if (mlx5_vdpa_roce_disable(&pci_dev->addr, &ibv) != 0) {
 685                 DRV_LOG(WARNING, "Failed to disable ROCE for \"%s\".",
 686                         ibv->name);
 687                 return -rte_errno;
 688         }
 689         ctx = mlx5_glue->dv_open_device(ibv);
 690         if (!ctx) {
 691                 DRV_LOG(ERR, "Failed to open IB device \"%s\".", ibv->name);
 692                 rte_errno = ENODEV;
 693                 return -rte_errno;
 694         }
 695         ret = mlx5_devx_cmd_query_hca_attr(ctx, &attr);
 696         if (ret) {
 697                 DRV_LOG(ERR, "Unable to read HCA capabilities.");
 698                 rte_errno = ENOTSUP;
 699                 goto error;
 700         } else if (!attr.vdpa.valid || !attr.vdpa.max_num_virtio_queues) {
 701                 DRV_LOG(ERR, "Not enough capabilities to support vdpa, maybe "
 702                         "old FW/OFED version?");
 703                 rte_errno = ENOTSUP;
 704                 goto error;
 705         }
 706         if (!attr.vdpa.queue_counters_valid)
 707                 DRV_LOG(DEBUG, "No capability to support virtq statistics.");
 708         priv = rte_zmalloc("mlx5 vDPA device private", sizeof(*priv) +
 709                            sizeof(struct mlx5_vdpa_virtq) *
 710                            attr.vdpa.max_num_virtio_queues * 2,
 711                            RTE_CACHE_LINE_SIZE);
 712         if (!priv) {
 713                 DRV_LOG(ERR, "Failed to allocate private memory.");
 714                 rte_errno = ENOMEM;
 715                 goto error;
 716         }
 717         priv->caps = attr.vdpa;
 718         priv->log_max_rqt_size = attr.log_max_rqt_size;
 719         priv->num_lag_ports = attr.num_lag_ports;
 720         priv->qp_ts_format = attr.qp_ts_format;
 721         if (attr.num_lag_ports == 0)
 722                 priv->num_lag_ports = 1;
 723         priv->ctx = ctx;
 724         priv->pci_dev = pci_dev;
 725         priv->var = mlx5_glue->dv_alloc_var(ctx, 0);
 726         if (!priv->var) {
 727                 DRV_LOG(ERR, "Failed to allocate VAR %u.", errno);
 728                 goto error;
 729         }
 730         priv->vdev = rte_vdpa_register_device(&pci_dev->device,
 731                         &mlx5_vdpa_ops);
 732         if (priv->vdev == NULL) {
 733                 DRV_LOG(ERR, "Failed to register vDPA device.");
 734                 rte_errno = rte_errno ? rte_errno : EINVAL;
 735                 goto error;
 736         }
 737         mlx5_vdpa_config_get(pci_dev->device.devargs, priv);
 738         SLIST_INIT(&priv->mr_list);
 739         pthread_mutex_init(&priv->vq_config_lock, NULL);
 740         pthread_mutex_lock(&priv_list_lock);
 741         TAILQ_INSERT_TAIL(&priv_list, priv, next);
 742         pthread_mutex_unlock(&priv_list_lock);
 743         return 0;
 744
 745 error:
 746         if (priv) {
 747                 if (priv->var)
 748                         mlx5_glue->dv_free_var(priv->var);
 749                 rte_free(priv);
 750         }
 751         if (ctx)
 752                 mlx5_glue->close_device(ctx);
 753         return -rte_errno;
 754 }
 755
 756 /**
 757  * DPDK callback to remove a PCI device.
 758  *
 759  * This function removes all vDPA devices belong to a given PCI device.
 760  *
 761  * @param[in] pci_dev
 762  *   Pointer to the PCI device.
 763  *
 764  * @return
 765  *   0 on success, the function cannot fail.
 766  */
 767 static int
 768 mlx5_vdpa_pci_remove(struct rte_pci_device *pci_dev)
 769 {
 770         struct mlx5_vdpa_priv *priv = NULL;
 771         int found = 0;
 772
 773         pthread_mutex_lock(&priv_list_lock);
 774         TAILQ_FOREACH(priv, &priv_list, next) {
 775                 if (!rte_pci_addr_cmp(&priv->pci_dev->addr, &pci_dev->addr)) {
 776                         found = 1;
 777                         break;
 778                 }
 779         }
 780         if (found)
 781                 TAILQ_REMOVE(&priv_list, priv, next);
 782         pthread_mutex_unlock(&priv_list_lock);
 783         if (found) {
 784                 if (priv->configured)
 785                         mlx5_vdpa_dev_close(priv->vid);
 786                 if (priv->var) {
 787                         mlx5_glue->dv_free_var(priv->var);
 788                         priv->var = NULL;
 789                 }
 790                 if (priv->vdev)
 791                         rte_vdpa_unregister_device(priv->vdev);
 792                 mlx5_glue->close_device(priv->ctx);
 793                 pthread_mutex_destroy(&priv->vq_config_lock);
 794                 rte_free(priv);
 795         }
 796         return 0;
 797 }
 798
 799 static const struct rte_pci_id mlx5_vdpa_pci_id_map[] = {
 800         {
 801                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
 802                                 PCI_DEVICE_ID_MELLANOX_CONNECTX6)
 803         },
 804         {
 805                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
 806                                 PCI_DEVICE_ID_MELLANOX_CONNECTX6VF)
 807         },
 808         {
 809                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
 810                                 PCI_DEVICE_ID_MELLANOX_CONNECTX6DX)
 811         },
 812         {
 813                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
 814                                 PCI_DEVICE_ID_MELLANOX_CONNECTXVF)
 815         },
 816         {
 817                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
 818                                 PCI_DEVICE_ID_MELLANOX_CONNECTX6DXBF)
 819         },
 820         {
 821                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
 822                                 PCI_DEVICE_ID_MELLANOX_CONNECTX7)
 823         },
 824         {
 825                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
 826                                 PCI_DEVICE_ID_MELLANOX_CONNECTX7BF)
 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_DEFAULT(mlx5_vdpa_logtype, 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");