drivers/net/mlx5/linux/mlx5_os.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright 2015 6WIND S.A.
   3  * Copyright 2020 Mellanox Technologies, Ltd
   4  */
   5
   6 #include <stddef.h>
   7 #include <unistd.h>
   8 #include <string.h>
   9 #include <stdint.h>
  10 #include <stdlib.h>
  11 #include <errno.h>
  12 #include <net/if.h>
  13 #include <sys/mman.h>
  14 #include <linux/rtnetlink.h>
  15 #include <fcntl.h>
  16
  17 /* Verbs header. */
  18 /* ISO C doesn't support unnamed structs/unions, disabling -pedantic. */
  19 #ifdef PEDANTIC
  20 #pragma GCC diagnostic ignored "-Wpedantic"
  21 #endif
  22 #include <infiniband/verbs.h>
  23 #ifdef PEDANTIC
  24 #pragma GCC diagnostic error "-Wpedantic"
  25 #endif
  26
  27 #include <rte_malloc.h>
  28 #include <rte_ethdev_driver.h>
  29 #include <rte_ethdev_pci.h>
  30 #include <rte_pci.h>
  31 #include <rte_bus_pci.h>
  32 #include <rte_common.h>
  33 #include <rte_kvargs.h>
  34 #include <rte_rwlock.h>
  35 #include <rte_spinlock.h>
  36 #include <rte_string_fns.h>
  37 #include <rte_alarm.h>
  38
  39 #include <mlx5_glue.h>
  40 #include <mlx5_devx_cmds.h>
  41 #include <mlx5_common.h>
  42 #include <mlx5_common_mp.h>
  43
  44 #include "mlx5_defs.h"
  45 #include "mlx5.h"
  46 #include "mlx5_utils.h"
  47 #include "mlx5_rxtx.h"
  48 #include "mlx5_autoconf.h"
  49 #include "mlx5_mr.h"
  50 #include "mlx5_flow.h"
  51 #include "rte_pmd_mlx5.h"
  52
  53 #define MLX5_TAGS_HLIST_ARRAY_SIZE 8192
  54
  55 #ifndef HAVE_IBV_MLX5_MOD_MPW
  56 #define MLX5DV_CONTEXT_FLAGS_MPW_ALLOWED (1 << 2)
  57 #define MLX5DV_CONTEXT_FLAGS_ENHANCED_MPW (1 << 3)
  58 #endif
  59
  60 #ifndef HAVE_IBV_MLX5_MOD_CQE_128B_COMP
  61 #define MLX5DV_CONTEXT_FLAGS_CQE_128B_COMP (1 << 4)
  62 #endif
  63
  64 /**
  65  * Get ibv device name. Given an ibv_context pointer - return a
  66  * pointer to the corresponding device name.
  67  *
  68  * @param[in] ctx
  69  *   Pointer to ibv context.
  70  *
  71  * @return
  72  *   Pointer to device name if ctx is valid, NULL otherwise.
  73  */
  74 const char *
  75 mlx5_os_get_ctx_device_name(void *ctx)
  76 {
  77         if (!ctx)
  78                 return NULL;
  79         return ((struct ibv_context *)ctx)->device->name;
  80 }
  81
  82 /**
  83  * Get ibv device path name. Given an ibv_context pointer - return a
  84  * pointer to the corresponding device path name.
  85  *
  86  * @param[in] ctx
  87  *   Pointer to ibv context.
  88  *
  89  * @return
  90  *   Pointer to device path name if ctx is valid, NULL otherwise.
  91  */
  92 const char *
  93 mlx5_os_get_ctx_device_path(void *ctx)
  94 {
  95         if (!ctx)
  96                 return NULL;
  97
  98         return ((struct ibv_context *)ctx)->device->ibdev_path;
  99 }
 100
 101 /**
 102  * Get umem id. Given a pointer to umem object of type
 103  * 'struct mlx5dv_devx_umem *' - return its id.
 104  *
 105  * @param[in] umem
 106  *   Pointer to umem object.
 107  *
 108  * @return
 109  *   The umem id if umem is valid, 0 otherwise.
 110  */
 111 uint32_t
 112 mlx5_os_get_umem_id(void *umem)
 113 {
 114         if (!umem)
 115                 return 0;
 116         return ((struct mlx5dv_devx_umem *)umem)->umem_id;
 117 }
 118
 119 /**
 120  * Get mlx5 device attributes. The glue function query_device_ex() is called
 121  * with out parameter of type 'struct ibv_device_attr_ex *'. Then fill in mlx5
 122  * device attributes from the glue out parameter.
 123  *
 124  * @param dev
 125  *   Pointer to ibv context.
 126  *
 127  * @param device_attr
 128  *   Pointer to mlx5 device attributes.
 129  *
 130  * @return
 131  *   0 on success, non zero error number otherwise
 132  */
 133 int
 134 mlx5_os_get_dev_attr(void *ctx, struct mlx5_dev_attr *device_attr)
 135 {
 136         int err;
 137         struct ibv_device_attr_ex attr_ex;
 138         memset(device_attr, 0, sizeof(*device_attr));
 139         err = mlx5_glue->query_device_ex(ctx, NULL, &attr_ex);
 140         if (err)
 141                 return err;
 142
 143         device_attr->device_cap_flags_ex = attr_ex.device_cap_flags_ex;
 144         device_attr->max_qp_wr = attr_ex.orig_attr.max_qp_wr;
 145         device_attr->max_sge = attr_ex.orig_attr.max_sge;
 146         device_attr->max_cq = attr_ex.orig_attr.max_cq;
 147         device_attr->max_qp = attr_ex.orig_attr.max_qp;
 148         device_attr->raw_packet_caps = attr_ex.raw_packet_caps;
 149         device_attr->max_rwq_indirection_table_size =
 150                 attr_ex.rss_caps.max_rwq_indirection_table_size;
 151         device_attr->max_tso = attr_ex.tso_caps.max_tso;
 152         device_attr->tso_supported_qpts = attr_ex.tso_caps.supported_qpts;
 153
 154         struct mlx5dv_context dv_attr = { .comp_mask = 0 };
 155         err = mlx5_glue->dv_query_device(ctx, &dv_attr);
 156         if (err)
 157                 return err;
 158
 159         device_attr->flags = dv_attr.flags;
 160         device_attr->comp_mask = dv_attr.comp_mask;
 161 #ifdef HAVE_IBV_MLX5_MOD_SWP
 162         device_attr->sw_parsing_offloads =
 163                 dv_attr.sw_parsing_caps.sw_parsing_offloads;
 164 #endif
 165         device_attr->min_single_stride_log_num_of_bytes =
 166                 dv_attr.striding_rq_caps.min_single_stride_log_num_of_bytes;
 167         device_attr->max_single_stride_log_num_of_bytes =
 168                 dv_attr.striding_rq_caps.max_single_stride_log_num_of_bytes;
 169         device_attr->min_single_wqe_log_num_of_strides =
 170                 dv_attr.striding_rq_caps.min_single_wqe_log_num_of_strides;
 171         device_attr->max_single_wqe_log_num_of_strides =
 172                 dv_attr.striding_rq_caps.max_single_wqe_log_num_of_strides;
 173         device_attr->stride_supported_qpts =
 174                 dv_attr.striding_rq_caps.supported_qpts;
 175 #ifdef HAVE_IBV_DEVICE_TUNNEL_SUPPORT
 176         device_attr->tunnel_offloads_caps = dv_attr.tunnel_offloads_caps;
 177 #endif
 178
 179         return err;
 180 }
 181
 182 /**
 183  * Verbs callback to allocate a memory. This function should allocate the space
 184  * according to the size provided residing inside a huge page.
 185  * Please note that all allocation must respect the alignment from libmlx5
 186  * (i.e. currently sysconf(_SC_PAGESIZE)).
 187  *
 188  * @param[in] size
 189  *   The size in bytes of the memory to allocate.
 190  * @param[in] data
 191  *   A pointer to the callback data.
 192  *
 193  * @return
 194  *   Allocated buffer, NULL otherwise and rte_errno is set.
 195  */
 196 static void *
 197 mlx5_alloc_verbs_buf(size_t size, void *data)
 198 {
 199         struct mlx5_priv *priv = data;
 200         void *ret;
 201         size_t alignment = sysconf(_SC_PAGESIZE);
 202         unsigned int socket = SOCKET_ID_ANY;
 203
 204         if (priv->verbs_alloc_ctx.type == MLX5_VERBS_ALLOC_TYPE_TX_QUEUE) {
 205                 const struct mlx5_txq_ctrl *ctrl = priv->verbs_alloc_ctx.obj;
 206
 207                 socket = ctrl->socket;
 208         } else if (priv->verbs_alloc_ctx.type ==
 209                    MLX5_VERBS_ALLOC_TYPE_RX_QUEUE) {
 210                 const struct mlx5_rxq_ctrl *ctrl = priv->verbs_alloc_ctx.obj;
 211
 212                 socket = ctrl->socket;
 213         }
 214         MLX5_ASSERT(data != NULL);
 215         ret = rte_malloc_socket(__func__, size, alignment, socket);
 216         if (!ret && size)
 217                 rte_errno = ENOMEM;
 218         return ret;
 219 }
 220
 221 /**
 222  * Verbs callback to free a memory.
 223  *
 224  * @param[in] ptr
 225  *   A pointer to the memory to free.
 226  * @param[in] data
 227  *   A pointer to the callback data.
 228  */
 229 static void
 230 mlx5_free_verbs_buf(void *ptr, void *data __rte_unused)
 231 {
 232         MLX5_ASSERT(data != NULL);
 233         rte_free(ptr);
 234 }
 235
 236 /**
 237  * Initialize DR related data within private structure.
 238  * Routine checks the reference counter and does actual
 239  * resources creation/initialization only if counter is zero.
 240  *
 241  * @param[in] priv
 242  *   Pointer to the private device data structure.
 243  *
 244  * @return
 245  *   Zero on success, positive error code otherwise.
 246  */
 247 static int
 248 mlx5_alloc_shared_dr(struct mlx5_priv *priv)
 249 {
 250         struct mlx5_dev_ctx_shared *sh = priv->sh;
 251         char s[MLX5_HLIST_NAMESIZE];
 252         int err = 0;
 253
 254         if (!sh->flow_tbls)
 255                 err = mlx5_alloc_table_hash_list(priv);
 256         else
 257                 DRV_LOG(DEBUG, "sh->flow_tbls[%p] already created, reuse\n",
 258                         (void *)sh->flow_tbls);
 259         if (err)
 260                 return err;
 261         /* Create tags hash list table. */
 262         snprintf(s, sizeof(s), "%s_tags", sh->ibdev_name);
 263         sh->tag_table = mlx5_hlist_create(s, MLX5_TAGS_HLIST_ARRAY_SIZE);
 264         if (!sh->tag_table) {
 265                 DRV_LOG(ERR, "tags with hash creation failed.\n");
 266                 err = ENOMEM;
 267                 goto error;
 268         }
 269 #ifdef HAVE_MLX5DV_DR
 270         void *domain;
 271
 272         if (sh->dv_refcnt) {
 273                 /* Shared DV/DR structures is already initialized. */
 274                 sh->dv_refcnt++;
 275                 priv->dr_shared = 1;
 276                 return 0;
 277         }
 278         /* Reference counter is zero, we should initialize structures. */
 279         domain = mlx5_glue->dr_create_domain(sh->ctx,
 280                                              MLX5DV_DR_DOMAIN_TYPE_NIC_RX);
 281         if (!domain) {
 282                 DRV_LOG(ERR, "ingress mlx5dv_dr_create_domain failed");
 283                 err = errno;
 284                 goto error;
 285         }
 286         sh->rx_domain = domain;
 287         domain = mlx5_glue->dr_create_domain(sh->ctx,
 288                                              MLX5DV_DR_DOMAIN_TYPE_NIC_TX);
 289         if (!domain) {
 290                 DRV_LOG(ERR, "egress mlx5dv_dr_create_domain failed");
 291                 err = errno;
 292                 goto error;
 293         }
 294         pthread_mutex_init(&sh->dv_mutex, NULL);
 295         sh->tx_domain = domain;
 296 #ifdef HAVE_MLX5DV_DR_ESWITCH
 297         if (priv->config.dv_esw_en) {
 298                 domain  = mlx5_glue->dr_create_domain
 299                         (sh->ctx, MLX5DV_DR_DOMAIN_TYPE_FDB);
 300                 if (!domain) {
 301                         DRV_LOG(ERR, "FDB mlx5dv_dr_create_domain failed");
 302                         err = errno;
 303                         goto error;
 304                 }
 305                 sh->fdb_domain = domain;
 306                 sh->esw_drop_action = mlx5_glue->dr_create_flow_action_drop();
 307         }
 308 #endif
 309         if (priv->config.reclaim_mode == MLX5_RCM_AGGR) {
 310                 mlx5_glue->dr_reclaim_domain_memory(sh->rx_domain, 1);
 311                 mlx5_glue->dr_reclaim_domain_memory(sh->tx_domain, 1);
 312                 if (sh->fdb_domain)
 313                         mlx5_glue->dr_reclaim_domain_memory(sh->fdb_domain, 1);
 314         }
 315         sh->pop_vlan_action = mlx5_glue->dr_create_flow_action_pop_vlan();
 316 #endif /* HAVE_MLX5DV_DR */
 317         sh->dv_refcnt++;
 318         priv->dr_shared = 1;
 319         return 0;
 320 error:
 321         /* Rollback the created objects. */
 322         if (sh->rx_domain) {
 323                 mlx5_glue->dr_destroy_domain(sh->rx_domain);
 324                 sh->rx_domain = NULL;
 325         }
 326         if (sh->tx_domain) {
 327                 mlx5_glue->dr_destroy_domain(sh->tx_domain);
 328                 sh->tx_domain = NULL;
 329         }
 330         if (sh->fdb_domain) {
 331                 mlx5_glue->dr_destroy_domain(sh->fdb_domain);
 332                 sh->fdb_domain = NULL;
 333         }
 334         if (sh->esw_drop_action) {
 335                 mlx5_glue->destroy_flow_action(sh->esw_drop_action);
 336                 sh->esw_drop_action = NULL;
 337         }
 338         if (sh->pop_vlan_action) {
 339                 mlx5_glue->destroy_flow_action(sh->pop_vlan_action);
 340                 sh->pop_vlan_action = NULL;
 341         }
 342         if (sh->tag_table) {
 343                 /* tags should be destroyed with flow before. */
 344                 mlx5_hlist_destroy(sh->tag_table, NULL, NULL);
 345                 sh->tag_table = NULL;
 346         }
 347         mlx5_free_table_hash_list(priv);
 348         return err;
 349 }
 350
 351 /**
 352  * Destroy DR related data within private structure.
 353  *
 354  * @param[in] priv
 355  *   Pointer to the private device data structure.
 356  */
 357 void
 358 mlx5_os_free_shared_dr(struct mlx5_priv *priv)
 359 {
 360         struct mlx5_dev_ctx_shared *sh;
 361
 362         if (!priv->dr_shared)
 363                 return;
 364         priv->dr_shared = 0;
 365         sh = priv->sh;
 366         MLX5_ASSERT(sh);
 367 #ifdef HAVE_MLX5DV_DR
 368         MLX5_ASSERT(sh->dv_refcnt);
 369         if (sh->dv_refcnt && --sh->dv_refcnt)
 370                 return;
 371         if (sh->rx_domain) {
 372                 mlx5_glue->dr_destroy_domain(sh->rx_domain);
 373                 sh->rx_domain = NULL;
 374         }
 375         if (sh->tx_domain) {
 376                 mlx5_glue->dr_destroy_domain(sh->tx_domain);
 377                 sh->tx_domain = NULL;
 378         }
 379 #ifdef HAVE_MLX5DV_DR_ESWITCH
 380         if (sh->fdb_domain) {
 381                 mlx5_glue->dr_destroy_domain(sh->fdb_domain);
 382                 sh->fdb_domain = NULL;
 383         }
 384         if (sh->esw_drop_action) {
 385                 mlx5_glue->destroy_flow_action(sh->esw_drop_action);
 386                 sh->esw_drop_action = NULL;
 387         }
 388 #endif
 389         if (sh->pop_vlan_action) {
 390                 mlx5_glue->destroy_flow_action(sh->pop_vlan_action);
 391                 sh->pop_vlan_action = NULL;
 392         }
 393         pthread_mutex_destroy(&sh->dv_mutex);
 394 #endif /* HAVE_MLX5DV_DR */
 395         if (sh->tag_table) {
 396                 /* tags should be destroyed with flow before. */
 397                 mlx5_hlist_destroy(sh->tag_table, NULL, NULL);
 398                 sh->tag_table = NULL;
 399         }
 400         mlx5_free_table_hash_list(priv);
 401 }
 402
 403 /**
 404  * Spawn an Ethernet device from Verbs information.
 405  *
 406  * @param dpdk_dev
 407  *   Backing DPDK device.
 408  * @param spawn
 409  *   Verbs device parameters (name, port, switch_info) to spawn.
 410  * @param config
 411  *   Device configuration parameters.
 412  *
 413  * @return
 414  *   A valid Ethernet device object on success, NULL otherwise and rte_errno
 415  *   is set. The following errors are defined:
 416  *
 417  *   EBUSY: device is not supposed to be spawned.
 418  *   EEXIST: device is already spawned
 419  */
 420 static struct rte_eth_dev *
 421 mlx5_dev_spawn(struct rte_device *dpdk_dev,
 422                struct mlx5_dev_spawn_data *spawn,
 423                struct mlx5_dev_config config)
 424 {
 425         const struct mlx5_switch_info *switch_info = &spawn->info;
 426         struct mlx5_dev_ctx_shared *sh = NULL;
 427         struct ibv_port_attr port_attr;
 428         struct mlx5dv_context dv_attr = { .comp_mask = 0 };
 429         struct rte_eth_dev *eth_dev = NULL;
 430         struct mlx5_priv *priv = NULL;
 431         int err = 0;
 432         unsigned int hw_padding = 0;
 433         unsigned int mps;
 434         unsigned int cqe_comp;
 435         unsigned int cqe_pad = 0;
 436         unsigned int tunnel_en = 0;
 437         unsigned int mpls_en = 0;
 438         unsigned int swp = 0;
 439         unsigned int mprq = 0;
 440         unsigned int mprq_min_stride_size_n = 0;
 441         unsigned int mprq_max_stride_size_n = 0;
 442         unsigned int mprq_min_stride_num_n = 0;
 443         unsigned int mprq_max_stride_num_n = 0;
 444         struct rte_ether_addr mac;
 445         char name[RTE_ETH_NAME_MAX_LEN];
 446         int own_domain_id = 0;
 447         uint16_t port_id;
 448         unsigned int i;
 449 #ifdef HAVE_MLX5DV_DR_DEVX_PORT
 450         struct mlx5dv_devx_port devx_port = { .comp_mask = 0 };
 451 #endif
 452
 453         /* Determine if this port representor is supposed to be spawned. */
 454         if (switch_info->representor && dpdk_dev->devargs) {
 455                 struct rte_eth_devargs eth_da;
 456
 457                 err = rte_eth_devargs_parse(dpdk_dev->devargs->args, &eth_da);
 458                 if (err) {
 459                         rte_errno = -err;
 460                         DRV_LOG(ERR, "failed to process device arguments: %s",
 461                                 strerror(rte_errno));
 462                         return NULL;
 463                 }
 464                 for (i = 0; i < eth_da.nb_representor_ports; ++i)
 465                         if (eth_da.representor_ports[i] ==
 466                             (uint16_t)switch_info->port_name)
 467                                 break;
 468                 if (i == eth_da.nb_representor_ports) {
 469                         rte_errno = EBUSY;
 470                         return NULL;
 471                 }
 472         }
 473         /* Build device name. */
 474         if (spawn->pf_bond <  0) {
 475                 /* Single device. */
 476                 if (!switch_info->representor)
 477                         strlcpy(name, dpdk_dev->name, sizeof(name));
 478                 else
 479                         snprintf(name, sizeof(name), "%s_representor_%u",
 480                                  dpdk_dev->name, switch_info->port_name);
 481         } else {
 482                 /* Bonding device. */
 483                 if (!switch_info->representor)
 484                         snprintf(name, sizeof(name), "%s_%s",
 485                                  dpdk_dev->name, spawn->ibv_dev->name);
 486                 else
 487                         snprintf(name, sizeof(name), "%s_%s_representor_%u",
 488                                  dpdk_dev->name, spawn->ibv_dev->name,
 489                                  switch_info->port_name);
 490         }
 491         /* check if the device is already spawned */
 492         if (rte_eth_dev_get_port_by_name(name, &port_id) == 0) {
 493                 rte_errno = EEXIST;
 494                 return NULL;
 495         }
 496         DRV_LOG(DEBUG, "naming Ethernet device \"%s\"", name);
 497         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
 498                 struct mlx5_mp_id mp_id;
 499
 500                 eth_dev = rte_eth_dev_attach_secondary(name);
 501                 if (eth_dev == NULL) {
 502                         DRV_LOG(ERR, "can not attach rte ethdev");
 503                         rte_errno = ENOMEM;
 504                         return NULL;
 505                 }
 506                 eth_dev->device = dpdk_dev;
 507                 eth_dev->dev_ops = &mlx5_dev_sec_ops;
 508                 err = mlx5_proc_priv_init(eth_dev);
 509                 if (err)
 510                         return NULL;
 511                 mp_id.port_id = eth_dev->data->port_id;
 512                 strlcpy(mp_id.name, MLX5_MP_NAME, RTE_MP_MAX_NAME_LEN);
 513                 /* Receive command fd from primary process */
 514                 err = mlx5_mp_req_verbs_cmd_fd(&mp_id);
 515                 if (err < 0)
 516                         goto err_secondary;
 517                 /* Remap UAR for Tx queues. */
 518                 err = mlx5_tx_uar_init_secondary(eth_dev, err);
 519                 if (err)
 520                         goto err_secondary;
 521                 /*
 522                  * Ethdev pointer is still required as input since
 523                  * the primary device is not accessible from the
 524                  * secondary process.
 525                  */
 526                 eth_dev->rx_pkt_burst = mlx5_select_rx_function(eth_dev);
 527                 eth_dev->tx_pkt_burst = mlx5_select_tx_function(eth_dev);
 528                 return eth_dev;
 529 err_secondary:
 530                 mlx5_dev_close(eth_dev);
 531                 return NULL;
 532         }
 533         /*
 534          * Some parameters ("tx_db_nc" in particularly) are needed in
 535          * advance to create dv/verbs device context. We proceed the
 536          * devargs here to get ones, and later proceed devargs again
 537          * to override some hardware settings.
 538          */
 539         err = mlx5_args(&config, dpdk_dev->devargs);
 540         if (err) {
 541                 err = rte_errno;
 542                 DRV_LOG(ERR, "failed to process device arguments: %s",
 543                         strerror(rte_errno));
 544                 goto error;
 545         }
 546         sh = mlx5_alloc_shared_ibctx(spawn, &config);
 547         if (!sh)
 548                 return NULL;
 549         config.devx = sh->devx;
 550 #ifdef HAVE_MLX5DV_DR_ACTION_DEST_DEVX_TIR
 551         config.dest_tir = 1;
 552 #endif
 553 #ifdef HAVE_IBV_MLX5_MOD_SWP
 554         dv_attr.comp_mask |= MLX5DV_CONTEXT_MASK_SWP;
 555 #endif
 556         /*
 557          * Multi-packet send is supported by ConnectX-4 Lx PF as well
 558          * as all ConnectX-5 devices.
 559          */
 560 #ifdef HAVE_IBV_DEVICE_TUNNEL_SUPPORT
 561         dv_attr.comp_mask |= MLX5DV_CONTEXT_MASK_TUNNEL_OFFLOADS;
 562 #endif
 563 #ifdef HAVE_IBV_DEVICE_STRIDING_RQ_SUPPORT
 564         dv_attr.comp_mask |= MLX5DV_CONTEXT_MASK_STRIDING_RQ;
 565 #endif
 566         mlx5_glue->dv_query_device(sh->ctx, &dv_attr);
 567         if (dv_attr.flags & MLX5DV_CONTEXT_FLAGS_MPW_ALLOWED) {
 568                 if (dv_attr.flags & MLX5DV_CONTEXT_FLAGS_ENHANCED_MPW) {
 569                         DRV_LOG(DEBUG, "enhanced MPW is supported");
 570                         mps = MLX5_MPW_ENHANCED;
 571                 } else {
 572                         DRV_LOG(DEBUG, "MPW is supported");
 573                         mps = MLX5_MPW;
 574                 }
 575         } else {
 576                 DRV_LOG(DEBUG, "MPW isn't supported");
 577                 mps = MLX5_MPW_DISABLED;
 578         }
 579 #ifdef HAVE_IBV_MLX5_MOD_SWP
 580         if (dv_attr.comp_mask & MLX5DV_CONTEXT_MASK_SWP)
 581                 swp = dv_attr.sw_parsing_caps.sw_parsing_offloads;
 582         DRV_LOG(DEBUG, "SWP support: %u", swp);
 583 #endif
 584         config.swp = !!swp;
 585 #ifdef HAVE_IBV_DEVICE_STRIDING_RQ_SUPPORT
 586         if (dv_attr.comp_mask & MLX5DV_CONTEXT_MASK_STRIDING_RQ) {
 587                 struct mlx5dv_striding_rq_caps mprq_caps =
 588                         dv_attr.striding_rq_caps;
 589
 590                 DRV_LOG(DEBUG, "\tmin_single_stride_log_num_of_bytes: %d",
 591                         mprq_caps.min_single_stride_log_num_of_bytes);
 592                 DRV_LOG(DEBUG, "\tmax_single_stride_log_num_of_bytes: %d",
 593                         mprq_caps.max_single_stride_log_num_of_bytes);
 594                 DRV_LOG(DEBUG, "\tmin_single_wqe_log_num_of_strides: %d",
 595                         mprq_caps.min_single_wqe_log_num_of_strides);
 596                 DRV_LOG(DEBUG, "\tmax_single_wqe_log_num_of_strides: %d",
 597                         mprq_caps.max_single_wqe_log_num_of_strides);
 598                 DRV_LOG(DEBUG, "\tsupported_qpts: %d",
 599                         mprq_caps.supported_qpts);
 600                 DRV_LOG(DEBUG, "device supports Multi-Packet RQ");
 601                 mprq = 1;
 602                 mprq_min_stride_size_n =
 603                         mprq_caps.min_single_stride_log_num_of_bytes;
 604                 mprq_max_stride_size_n =
 605                         mprq_caps.max_single_stride_log_num_of_bytes;
 606                 mprq_min_stride_num_n =
 607                         mprq_caps.min_single_wqe_log_num_of_strides;
 608                 mprq_max_stride_num_n =
 609                         mprq_caps.max_single_wqe_log_num_of_strides;
 610         }
 611 #endif
 612         if (RTE_CACHE_LINE_SIZE == 128 &&
 613             !(dv_attr.flags & MLX5DV_CONTEXT_FLAGS_CQE_128B_COMP))
 614                 cqe_comp = 0;
 615         else
 616                 cqe_comp = 1;
 617         config.cqe_comp = cqe_comp;
 618 #ifdef HAVE_IBV_MLX5_MOD_CQE_128B_PAD
 619         /* Whether device supports 128B Rx CQE padding. */
 620         cqe_pad = RTE_CACHE_LINE_SIZE == 128 &&
 621                   (dv_attr.flags & MLX5DV_CONTEXT_FLAGS_CQE_128B_PAD);
 622 #endif
 623 #ifdef HAVE_IBV_DEVICE_TUNNEL_SUPPORT
 624         if (dv_attr.comp_mask & MLX5DV_CONTEXT_MASK_TUNNEL_OFFLOADS) {
 625                 tunnel_en = ((dv_attr.tunnel_offloads_caps &
 626                               MLX5DV_RAW_PACKET_CAP_TUNNELED_OFFLOAD_VXLAN) &&
 627                              (dv_attr.tunnel_offloads_caps &
 628                               MLX5DV_RAW_PACKET_CAP_TUNNELED_OFFLOAD_GRE) &&
 629                              (dv_attr.tunnel_offloads_caps &
 630                               MLX5DV_RAW_PACKET_CAP_TUNNELED_OFFLOAD_GENEVE));
 631         }
 632         DRV_LOG(DEBUG, "tunnel offloading is %ssupported",
 633                 tunnel_en ? "" : "not ");
 634 #else
 635         DRV_LOG(WARNING,
 636                 "tunnel offloading disabled due to old OFED/rdma-core version");
 637 #endif
 638         config.tunnel_en = tunnel_en;
 639 #ifdef HAVE_IBV_DEVICE_MPLS_SUPPORT
 640         mpls_en = ((dv_attr.tunnel_offloads_caps &
 641                     MLX5DV_RAW_PACKET_CAP_TUNNELED_OFFLOAD_CW_MPLS_OVER_GRE) &&
 642                    (dv_attr.tunnel_offloads_caps &
 643                     MLX5DV_RAW_PACKET_CAP_TUNNELED_OFFLOAD_CW_MPLS_OVER_UDP));
 644         DRV_LOG(DEBUG, "MPLS over GRE/UDP tunnel offloading is %ssupported",
 645                 mpls_en ? "" : "not ");
 646 #else
 647         DRV_LOG(WARNING, "MPLS over GRE/UDP tunnel offloading disabled due to"
 648                 " old OFED/rdma-core version or firmware configuration");
 649 #endif
 650         config.mpls_en = mpls_en;
 651         /* Check port status. */
 652         err = mlx5_glue->query_port(sh->ctx, spawn->ibv_port, &port_attr);
 653         if (err) {
 654                 DRV_LOG(ERR, "port query failed: %s", strerror(err));
 655                 goto error;
 656         }
 657         if (port_attr.link_layer != IBV_LINK_LAYER_ETHERNET) {
 658                 DRV_LOG(ERR, "port is not configured in Ethernet mode");
 659                 err = EINVAL;
 660                 goto error;
 661         }
 662         if (port_attr.state != IBV_PORT_ACTIVE)
 663                 DRV_LOG(DEBUG, "port is not active: \"%s\" (%d)",
 664                         mlx5_glue->port_state_str(port_attr.state),
 665                         port_attr.state);
 666         /* Allocate private eth device data. */
 667         priv = rte_zmalloc("ethdev private structure",
 668                            sizeof(*priv),
 669                            RTE_CACHE_LINE_SIZE);
 670         if (priv == NULL) {
 671                 DRV_LOG(ERR, "priv allocation failure");
 672                 err = ENOMEM;
 673                 goto error;
 674         }
 675         priv->sh = sh;
 676         priv->ibv_port = spawn->ibv_port;
 677         priv->pci_dev = spawn->pci_dev;
 678         priv->mtu = RTE_ETHER_MTU;
 679         priv->mp_id.port_id = port_id;
 680         strlcpy(priv->mp_id.name, MLX5_MP_NAME, RTE_MP_MAX_NAME_LEN);
 681 #ifndef RTE_ARCH_64
 682         /* Initialize UAR access locks for 32bit implementations. */
 683         rte_spinlock_init(&priv->uar_lock_cq);
 684         for (i = 0; i < MLX5_UAR_PAGE_NUM_MAX; i++)
 685                 rte_spinlock_init(&priv->uar_lock[i]);
 686 #endif
 687         /* Some internal functions rely on Netlink sockets, open them now. */
 688         priv->nl_socket_rdma = mlx5_nl_init(NETLINK_RDMA);
 689         priv->nl_socket_route = mlx5_nl_init(NETLINK_ROUTE);
 690         priv->representor = !!switch_info->representor;
 691         priv->master = !!switch_info->master;
 692         priv->domain_id = RTE_ETH_DEV_SWITCH_DOMAIN_ID_INVALID;
 693         priv->vport_meta_tag = 0;
 694         priv->vport_meta_mask = 0;
 695         priv->pf_bond = spawn->pf_bond;
 696 #ifdef HAVE_MLX5DV_DR_DEVX_PORT
 697         /*
 698          * The DevX port query API is implemented. E-Switch may use
 699          * either vport or reg_c[0] metadata register to match on
 700          * vport index. The engaged part of metadata register is
 701          * defined by mask.
 702          */
 703         if (switch_info->representor || switch_info->master) {
 704                 devx_port.comp_mask = MLX5DV_DEVX_PORT_VPORT |
 705                                       MLX5DV_DEVX_PORT_MATCH_REG_C_0;
 706                 err = mlx5_glue->devx_port_query(sh->ctx, spawn->ibv_port,
 707                                                  &devx_port);
 708                 if (err) {
 709                         DRV_LOG(WARNING,
 710                                 "can't query devx port %d on device %s",
 711                                 spawn->ibv_port, spawn->ibv_dev->name);
 712                         devx_port.comp_mask = 0;
 713                 }
 714         }
 715         if (devx_port.comp_mask & MLX5DV_DEVX_PORT_MATCH_REG_C_0) {
 716                 priv->vport_meta_tag = devx_port.reg_c_0.value;
 717                 priv->vport_meta_mask = devx_port.reg_c_0.mask;
 718                 if (!priv->vport_meta_mask) {
 719                         DRV_LOG(ERR, "vport zero mask for port %d"
 720                                      " on bonding device %s",
 721                                      spawn->ibv_port, spawn->ibv_dev->name);
 722                         err = ENOTSUP;
 723                         goto error;
 724                 }
 725                 if (priv->vport_meta_tag & ~priv->vport_meta_mask) {
 726                         DRV_LOG(ERR, "invalid vport tag for port %d"
 727                                      " on bonding device %s",
 728                                      spawn->ibv_port, spawn->ibv_dev->name);
 729                         err = ENOTSUP;
 730                         goto error;
 731                 }
 732         }
 733         if (devx_port.comp_mask & MLX5DV_DEVX_PORT_VPORT) {
 734                 priv->vport_id = devx_port.vport_num;
 735         } else if (spawn->pf_bond >= 0) {
 736                 DRV_LOG(ERR, "can't deduce vport index for port %d"
 737                              " on bonding device %s",
 738                              spawn->ibv_port, spawn->ibv_dev->name);
 739                 err = ENOTSUP;
 740                 goto error;
 741         } else {
 742                 /* Suppose vport index in compatible way. */
 743                 priv->vport_id = switch_info->representor ?
 744                                  switch_info->port_name + 1 : -1;
 745         }
 746 #else
 747         /*
 748          * Kernel/rdma_core support single E-Switch per PF configurations
 749          * only and vport_id field contains the vport index for
 750          * associated VF, which is deduced from representor port name.
 751          * For example, let's have the IB device port 10, it has
 752          * attached network device eth0, which has port name attribute
 753          * pf0vf2, we can deduce the VF number as 2, and set vport index
 754          * as 3 (2+1). This assigning schema should be changed if the
 755          * multiple E-Switch instances per PF configurations or/and PCI
 756          * subfunctions are added.
 757          */
 758         priv->vport_id = switch_info->representor ?
 759                          switch_info->port_name + 1 : -1;
 760 #endif
 761         /* representor_id field keeps the unmodified VF index. */
 762         priv->representor_id = switch_info->representor ?
 763                                switch_info->port_name : -1;
 764         /*
 765          * Look for sibling devices in order to reuse their switch domain
 766          * if any, otherwise allocate one.
 767          */
 768         MLX5_ETH_FOREACH_DEV(port_id, priv->pci_dev) {
 769                 const struct mlx5_priv *opriv =
 770                         rte_eth_devices[port_id].data->dev_private;
 771
 772                 if (!opriv ||
 773                     opriv->sh != priv->sh ||
 774                         opriv->domain_id ==
 775                         RTE_ETH_DEV_SWITCH_DOMAIN_ID_INVALID)
 776                         continue;
 777                 priv->domain_id = opriv->domain_id;
 778                 break;
 779         }
 780         if (priv->domain_id == RTE_ETH_DEV_SWITCH_DOMAIN_ID_INVALID) {
 781                 err = rte_eth_switch_domain_alloc(&priv->domain_id);
 782                 if (err) {
 783                         err = rte_errno;
 784                         DRV_LOG(ERR, "unable to allocate switch domain: %s",
 785                                 strerror(rte_errno));
 786                         goto error;
 787                 }
 788                 own_domain_id = 1;
 789         }
 790         /* Override some values set by hardware configuration. */
 791         mlx5_args(&config, dpdk_dev->devargs);
 792         err = mlx5_dev_check_sibling_config(priv, &config);
 793         if (err)
 794                 goto error;
 795         config.hw_csum = !!(sh->device_attr.device_cap_flags_ex &
 796                             IBV_DEVICE_RAW_IP_CSUM);
 797         DRV_LOG(DEBUG, "checksum offloading is %ssupported",
 798                 (config.hw_csum ? "" : "not "));
 799 #if !defined(HAVE_IBV_DEVICE_COUNTERS_SET_V42) && \
 800         !defined(HAVE_IBV_DEVICE_COUNTERS_SET_V45)
 801         DRV_LOG(DEBUG, "counters are not supported");
 802 #endif
 803 #if !defined(HAVE_IBV_FLOW_DV_SUPPORT) || !defined(HAVE_MLX5DV_DR)
 804         if (config.dv_flow_en) {
 805                 DRV_LOG(WARNING, "DV flow is not supported");
 806                 config.dv_flow_en = 0;
 807         }
 808 #endif
 809         config.ind_table_max_size =
 810                 sh->device_attr.max_rwq_indirection_table_size;
 811         /*
 812          * Remove this check once DPDK supports larger/variable
 813          * indirection tables.
 814          */
 815         if (config.ind_table_max_size > (unsigned int)ETH_RSS_RETA_SIZE_512)
 816                 config.ind_table_max_size = ETH_RSS_RETA_SIZE_512;
 817         DRV_LOG(DEBUG, "maximum Rx indirection table size is %u",
 818                 config.ind_table_max_size);
 819         config.hw_vlan_strip = !!(sh->device_attr.raw_packet_caps &
 820                                   IBV_RAW_PACKET_CAP_CVLAN_STRIPPING);
 821         DRV_LOG(DEBUG, "VLAN stripping is %ssupported",
 822                 (config.hw_vlan_strip ? "" : "not "));
 823         config.hw_fcs_strip = !!(sh->device_attr.raw_packet_caps &
 824                                  IBV_RAW_PACKET_CAP_SCATTER_FCS);
 825         DRV_LOG(DEBUG, "FCS stripping configuration is %ssupported",
 826                 (config.hw_fcs_strip ? "" : "not "));
 827 #if defined(HAVE_IBV_WQ_FLAG_RX_END_PADDING)
 828         hw_padding = !!sh->device_attr.rx_pad_end_addr_align;
 829 #elif defined(HAVE_IBV_WQ_FLAGS_PCI_WRITE_END_PADDING)
 830         hw_padding = !!(sh->device_attr.device_cap_flags_ex &
 831                         IBV_DEVICE_PCI_WRITE_END_PADDING);
 832 #endif
 833         if (config.hw_padding && !hw_padding) {
 834                 DRV_LOG(DEBUG, "Rx end alignment padding isn't supported");
 835                 config.hw_padding = 0;
 836         } else if (config.hw_padding) {
 837                 DRV_LOG(DEBUG, "Rx end alignment padding is enabled");
 838         }
 839         config.tso = (sh->device_attr.max_tso > 0 &&
 840                       (sh->device_attr.tso_supported_qpts &
 841                        (1 << IBV_QPT_RAW_PACKET)));
 842         if (config.tso)
 843                 config.tso_max_payload_sz = sh->device_attr.max_tso;
 844         /*
 845          * MPW is disabled by default, while the Enhanced MPW is enabled
 846          * by default.
 847          */
 848         if (config.mps == MLX5_ARG_UNSET)
 849                 config.mps = (mps == MLX5_MPW_ENHANCED) ? MLX5_MPW_ENHANCED :
 850                                                           MLX5_MPW_DISABLED;
 851         else
 852                 config.mps = config.mps ? mps : MLX5_MPW_DISABLED;
 853         DRV_LOG(INFO, "%sMPS is %s",
 854                 config.mps == MLX5_MPW_ENHANCED ? "enhanced " :
 855                 config.mps == MLX5_MPW ? "legacy " : "",
 856                 config.mps != MLX5_MPW_DISABLED ? "enabled" : "disabled");
 857         if (config.cqe_comp && !cqe_comp) {
 858                 DRV_LOG(WARNING, "Rx CQE compression isn't supported");
 859                 config.cqe_comp = 0;
 860         }
 861         if (config.cqe_pad && !cqe_pad) {
 862                 DRV_LOG(WARNING, "Rx CQE padding isn't supported");
 863                 config.cqe_pad = 0;
 864         } else if (config.cqe_pad) {
 865                 DRV_LOG(INFO, "Rx CQE padding is enabled");
 866         }
 867         if (config.devx) {
 868                 priv->counter_fallback = 0;
 869                 err = mlx5_devx_cmd_query_hca_attr(sh->ctx, &config.hca_attr);
 870                 if (err) {
 871                         err = -err;
 872                         goto error;
 873                 }
 874                 if (!config.hca_attr.flow_counters_dump)
 875                         priv->counter_fallback = 1;
 876 #ifndef HAVE_IBV_DEVX_ASYNC
 877                 priv->counter_fallback = 1;
 878 #endif
 879                 if (priv->counter_fallback)
 880                         DRV_LOG(INFO, "Use fall-back DV counter management");
 881                 /* Check for LRO support. */
 882                 if (config.dest_tir && config.hca_attr.lro_cap &&
 883                     config.dv_flow_en) {
 884                         /* TBD check tunnel lro caps. */
 885                         config.lro.supported = config.hca_attr.lro_cap;
 886                         DRV_LOG(DEBUG, "Device supports LRO");
 887                         /*
 888                          * If LRO timeout is not configured by application,
 889                          * use the minimal supported value.
 890                          */
 891                         if (!config.lro.timeout)
 892                                 config.lro.timeout =
 893                                 config.hca_attr.lro_timer_supported_periods[0];
 894                         DRV_LOG(DEBUG, "LRO session timeout set to %d usec",
 895                                 config.lro.timeout);
 896                 }
 897 #if defined(HAVE_MLX5DV_DR) && defined(HAVE_MLX5_DR_CREATE_ACTION_FLOW_METER)
 898                 if (config.hca_attr.qos.sup && config.hca_attr.qos.srtcm_sup &&
 899                     config.dv_flow_en) {
 900                         uint8_t reg_c_mask =
 901                                 config.hca_attr.qos.flow_meter_reg_c_ids;
 902                         /*
 903                          * Meter needs two REG_C's for color match and pre-sfx
 904                          * flow match. Here get the REG_C for color match.
 905                          * REG_C_0 and REG_C_1 is reserved for metadata feature.
 906                          */
 907                         reg_c_mask &= 0xfc;
 908                         if (__builtin_popcount(reg_c_mask) < 1) {
 909                                 priv->mtr_en = 0;
 910                                 DRV_LOG(WARNING, "No available register for"
 911                                         " meter.");
 912                         } else {
 913                                 priv->mtr_color_reg = ffs(reg_c_mask) - 1 +
 914                                                       REG_C_0;
 915                                 priv->mtr_en = 1;
 916                                 priv->mtr_reg_share =
 917                                       config.hca_attr.qos.flow_meter_reg_share;
 918                                 DRV_LOG(DEBUG, "The REG_C meter uses is %d",
 919                                         priv->mtr_color_reg);
 920                         }
 921                 }
 922 #endif
 923         }
 924         if (config.mprq.enabled && mprq) {
 925                 if (config.mprq.stride_num_n &&
 926                     (config.mprq.stride_num_n > mprq_max_stride_num_n ||
 927                      config.mprq.stride_num_n < mprq_min_stride_num_n)) {
 928                         config.mprq.stride_num_n =
 929                                 RTE_MIN(RTE_MAX(MLX5_MPRQ_STRIDE_NUM_N,
 930                                                 mprq_min_stride_num_n),
 931                                         mprq_max_stride_num_n);
 932                         DRV_LOG(WARNING,
 933                                 "the number of strides"
 934                                 " for Multi-Packet RQ is out of range,"
 935                                 " setting default value (%u)",
 936                                 1 << config.mprq.stride_num_n);
 937                 }
 938                 if (config.mprq.stride_size_n &&
 939                     (config.mprq.stride_size_n > mprq_max_stride_size_n ||
 940                      config.mprq.stride_size_n < mprq_min_stride_size_n)) {
 941                         config.mprq.stride_size_n =
 942                                 RTE_MIN(RTE_MAX(MLX5_MPRQ_STRIDE_SIZE_N,
 943                                                 mprq_min_stride_size_n),
 944                                         mprq_max_stride_size_n);
 945                         DRV_LOG(WARNING,
 946                                 "the size of a stride"
 947                                 " for Multi-Packet RQ is out of range,"
 948                                 " setting default value (%u)",
 949                                 1 << config.mprq.stride_size_n);
 950                 }
 951                 config.mprq.min_stride_size_n = mprq_min_stride_size_n;
 952                 config.mprq.max_stride_size_n = mprq_max_stride_size_n;
 953         } else if (config.mprq.enabled && !mprq) {
 954                 DRV_LOG(WARNING, "Multi-Packet RQ isn't supported");
 955                 config.mprq.enabled = 0;
 956         }
 957         if (config.max_dump_files_num == 0)
 958                 config.max_dump_files_num = 128;
 959         eth_dev = rte_eth_dev_allocate(name);
 960         if (eth_dev == NULL) {
 961                 DRV_LOG(ERR, "can not allocate rte ethdev");
 962                 err = ENOMEM;
 963                 goto error;
 964         }
 965         /* Flag to call rte_eth_dev_release_port() in rte_eth_dev_close(). */
 966         eth_dev->data->dev_flags |= RTE_ETH_DEV_CLOSE_REMOVE;
 967         if (priv->representor) {
 968                 eth_dev->data->dev_flags |= RTE_ETH_DEV_REPRESENTOR;
 969                 eth_dev->data->representor_id = priv->representor_id;
 970         }
 971         /*
 972          * Store associated network device interface index. This index
 973          * is permanent throughout the lifetime of device. So, we may store
 974          * the ifindex here and use the cached value further.
 975          */
 976         MLX5_ASSERT(spawn->ifindex);
 977         priv->if_index = spawn->ifindex;
 978         eth_dev->data->dev_private = priv;
 979         priv->dev_data = eth_dev->data;
 980         eth_dev->data->mac_addrs = priv->mac;
 981         eth_dev->device = dpdk_dev;
 982         /* Configure the first MAC address by default. */
 983         if (mlx5_get_mac(eth_dev, &mac.addr_bytes)) {
 984                 DRV_LOG(ERR,
 985                         "port %u cannot get MAC address, is mlx5_en"
 986                         " loaded? (errno: %s)",
 987                         eth_dev->data->port_id, strerror(rte_errno));
 988                 err = ENODEV;
 989                 goto error;
 990         }
 991         DRV_LOG(INFO,
 992                 "port %u MAC address is %02x:%02x:%02x:%02x:%02x:%02x",
 993                 eth_dev->data->port_id,
 994                 mac.addr_bytes[0], mac.addr_bytes[1],
 995                 mac.addr_bytes[2], mac.addr_bytes[3],
 996                 mac.addr_bytes[4], mac.addr_bytes[5]);
 997 #ifdef RTE_LIBRTE_MLX5_DEBUG
 998         {
 999                 char ifname[IF_NAMESIZE];
1000
1001                 if (mlx5_get_ifname(eth_dev, &ifname) == 0)
1002                         DRV_LOG(DEBUG, "port %u ifname is \"%s\"",
1003                                 eth_dev->data->port_id, ifname);
1004                 else
1005                         DRV_LOG(DEBUG, "port %u ifname is unknown",
1006                                 eth_dev->data->port_id);
1007         }
1008 #endif
1009         /* Get actual MTU if possible. */
1010         err = mlx5_get_mtu(eth_dev, &priv->mtu);
1011         if (err) {
1012                 err = rte_errno;
1013                 goto error;
1014         }
1015         DRV_LOG(DEBUG, "port %u MTU is %u", eth_dev->data->port_id,
1016                 priv->mtu);
1017         /* Initialize burst functions to prevent crashes before link-up. */
1018         eth_dev->rx_pkt_burst = removed_rx_burst;
1019         eth_dev->tx_pkt_burst = removed_tx_burst;
1020         eth_dev->dev_ops = &mlx5_dev_ops;
1021         /* Register MAC address. */
1022         claim_zero(mlx5_mac_addr_add(eth_dev, &mac, 0, 0));
1023         if (config.vf && config.vf_nl_en)
1024                 mlx5_nl_mac_addr_sync(priv->nl_socket_route,
1025                                       mlx5_ifindex(eth_dev),
1026                                       eth_dev->data->mac_addrs,
1027                                       MLX5_MAX_MAC_ADDRESSES);
1028         priv->flows = 0;
1029         priv->ctrl_flows = 0;
1030         TAILQ_INIT(&priv->flow_meters);
1031         TAILQ_INIT(&priv->flow_meter_profiles);
1032         /* Hint libmlx5 to use PMD allocator for data plane resources */
1033         struct mlx5dv_ctx_allocators alctr = {
1034                 .alloc = &mlx5_alloc_verbs_buf,
1035                 .free = &mlx5_free_verbs_buf,
1036                 .data = priv,
1037         };
1038         mlx5_glue->dv_set_context_attr(sh->ctx,
1039                                        MLX5DV_CTX_ATTR_BUF_ALLOCATORS,
1040                                        (void *)((uintptr_t)&alctr));
1041         /* Bring Ethernet device up. */
1042         DRV_LOG(DEBUG, "port %u forcing Ethernet interface up",
1043                 eth_dev->data->port_id);
1044         mlx5_set_link_up(eth_dev);
1045         /*
1046          * Even though the interrupt handler is not installed yet,
1047          * interrupts will still trigger on the async_fd from
1048          * Verbs context returned by ibv_open_device().
1049          */
1050         mlx5_link_update(eth_dev, 0);
1051 #ifdef HAVE_MLX5DV_DR_ESWITCH
1052         if (!(config.hca_attr.eswitch_manager && config.dv_flow_en &&
1053               (switch_info->representor || switch_info->master)))
1054                 config.dv_esw_en = 0;
1055 #else
1056         config.dv_esw_en = 0;
1057 #endif
1058         /* Detect minimal data bytes to inline. */
1059         mlx5_set_min_inline(spawn, &config);
1060         /* Store device configuration on private structure. */
1061         priv->config = config;
1062         /* Create context for virtual machine VLAN workaround. */
1063         priv->vmwa_context = mlx5_vlan_vmwa_init(eth_dev, spawn->ifindex);
1064         if (config.dv_flow_en) {
1065                 err = mlx5_alloc_shared_dr(priv);
1066                 if (err)
1067                         goto error;
1068                 /*
1069                  * RSS id is shared with meter flow id. Meter flow id can only
1070                  * use the 24 MSB of the register.
1071                  */
1072                 priv->qrss_id_pool = mlx5_flow_id_pool_alloc(UINT32_MAX >>
1073                                      MLX5_MTR_COLOR_BITS);
1074                 if (!priv->qrss_id_pool) {
1075                         DRV_LOG(ERR, "can't create flow id pool");
1076                         err = ENOMEM;
1077                         goto error;
1078                 }
1079         }
1080         /* Supported Verbs flow priority number detection. */
1081         err = mlx5_flow_discover_priorities(eth_dev);
1082         if (err < 0) {
1083                 err = -err;
1084                 goto error;
1085         }
1086         priv->config.flow_prio = err;
1087         if (!priv->config.dv_esw_en &&
1088             priv->config.dv_xmeta_en != MLX5_XMETA_MODE_LEGACY) {
1089                 DRV_LOG(WARNING, "metadata mode %u is not supported "
1090                                  "(no E-Switch)", priv->config.dv_xmeta_en);
1091                 priv->config.dv_xmeta_en = MLX5_XMETA_MODE_LEGACY;
1092         }
1093         mlx5_set_metadata_mask(eth_dev);
1094         if (priv->config.dv_xmeta_en != MLX5_XMETA_MODE_LEGACY &&
1095             !priv->sh->dv_regc0_mask) {
1096                 DRV_LOG(ERR, "metadata mode %u is not supported "
1097                              "(no metadata reg_c[0] is available)",
1098                              priv->config.dv_xmeta_en);
1099                         err = ENOTSUP;
1100                         goto error;
1101         }
1102         /*
1103          * Allocate the buffer for flow creating, just once.
1104          * The allocation must be done before any flow creating.
1105          */
1106         mlx5_flow_alloc_intermediate(eth_dev);
1107         /* Query availability of metadata reg_c's. */
1108         err = mlx5_flow_discover_mreg_c(eth_dev);
1109         if (err < 0) {
1110                 err = -err;
1111                 goto error;
1112         }
1113         if (!mlx5_flow_ext_mreg_supported(eth_dev)) {
1114                 DRV_LOG(DEBUG,
1115                         "port %u extensive metadata register is not supported",
1116                         eth_dev->data->port_id);
1117                 if (priv->config.dv_xmeta_en != MLX5_XMETA_MODE_LEGACY) {
1118                         DRV_LOG(ERR, "metadata mode %u is not supported "
1119                                      "(no metadata registers available)",
1120                                      priv->config.dv_xmeta_en);
1121                         err = ENOTSUP;
1122                         goto error;
1123                 }
1124         }
1125         if (priv->config.dv_flow_en &&
1126             priv->config.dv_xmeta_en != MLX5_XMETA_MODE_LEGACY &&
1127             mlx5_flow_ext_mreg_supported(eth_dev) &&
1128             priv->sh->dv_regc0_mask) {
1129                 priv->mreg_cp_tbl = mlx5_hlist_create(MLX5_FLOW_MREG_HNAME,
1130                                                       MLX5_FLOW_MREG_HTABLE_SZ);
1131                 if (!priv->mreg_cp_tbl) {
1132                         err = ENOMEM;
1133                         goto error;
1134                 }
1135         }
1136         return eth_dev;
1137 error:
1138         if (priv) {
1139                 if (priv->mreg_cp_tbl)
1140                         mlx5_hlist_destroy(priv->mreg_cp_tbl, NULL, NULL);
1141                 if (priv->sh)
1142                         mlx5_os_free_shared_dr(priv);
1143                 if (priv->nl_socket_route >= 0)
1144                         close(priv->nl_socket_route);
1145                 if (priv->nl_socket_rdma >= 0)
1146                         close(priv->nl_socket_rdma);
1147                 if (priv->vmwa_context)
1148                         mlx5_vlan_vmwa_exit(priv->vmwa_context);
1149                 if (priv->qrss_id_pool)
1150                         mlx5_flow_id_pool_release(priv->qrss_id_pool);
1151                 if (own_domain_id)
1152                         claim_zero(rte_eth_switch_domain_free(priv->domain_id));
1153                 rte_free(priv);
1154                 if (eth_dev != NULL)
1155                         eth_dev->data->dev_private = NULL;
1156         }
1157         if (eth_dev != NULL) {
1158                 /* mac_addrs must not be freed alone because part of
1159                  * dev_private
1160                  **/
1161                 eth_dev->data->mac_addrs = NULL;
1162                 rte_eth_dev_release_port(eth_dev);
1163         }
1164         if (sh)
1165                 mlx5_free_shared_ibctx(sh);
1166         MLX5_ASSERT(err > 0);
1167         rte_errno = err;
1168         return NULL;
1169 }
1170
1171 /**
1172  * Comparison callback to sort device data.
1173  *
1174  * This is meant to be used with qsort().
1175  *
1176  * @param a[in]
1177  *   Pointer to pointer to first data object.
1178  * @param b[in]
1179  *   Pointer to pointer to second data object.
1180  *
1181  * @return
1182  *   0 if both objects are equal, less than 0 if the first argument is less
1183  *   than the second, greater than 0 otherwise.
1184  */
1185 static int
1186 mlx5_dev_spawn_data_cmp(const void *a, const void *b)
1187 {
1188         const struct mlx5_switch_info *si_a =
1189                 &((const struct mlx5_dev_spawn_data *)a)->info;
1190         const struct mlx5_switch_info *si_b =
1191                 &((const struct mlx5_dev_spawn_data *)b)->info;
1192         int ret;
1193
1194         /* Master device first. */
1195         ret = si_b->master - si_a->master;
1196         if (ret)
1197                 return ret;
1198         /* Then representor devices. */
1199         ret = si_b->representor - si_a->representor;
1200         if (ret)
1201                 return ret;
1202         /* Unidentified devices come last in no specific order. */
1203         if (!si_a->representor)
1204                 return 0;
1205         /* Order representors by name. */
1206         return si_a->port_name - si_b->port_name;
1207 }
1208
1209 /**
1210  * Match PCI information for possible slaves of bonding device.
1211  *
1212  * @param[in] ibv_dev
1213  *   Pointer to Infiniband device structure.
1214  * @param[in] pci_dev
1215  *   Pointer to PCI device structure to match PCI address.
1216  * @param[in] nl_rdma
1217  *   Netlink RDMA group socket handle.
1218  *
1219  * @return
1220  *   negative value if no bonding device found, otherwise
1221  *   positive index of slave PF in bonding.
1222  */
1223 static int
1224 mlx5_device_bond_pci_match(const struct ibv_device *ibv_dev,
1225                            const struct rte_pci_device *pci_dev,
1226                            int nl_rdma)
1227 {
1228         char ifname[IF_NAMESIZE + 1];
1229         unsigned int ifindex;
1230         unsigned int np, i;
1231         FILE *file = NULL;
1232         int pf = -1;
1233
1234         /*
1235          * Try to get master device name. If something goes
1236          * wrong suppose the lack of kernel support and no
1237          * bonding devices.
1238          */
1239         if (nl_rdma < 0)
1240                 return -1;
1241         if (!strstr(ibv_dev->name, "bond"))
1242                 return -1;
1243         np = mlx5_nl_portnum(nl_rdma, ibv_dev->name);
1244         if (!np)
1245                 return -1;
1246         /*
1247          * The Master device might not be on the predefined
1248          * port (not on port index 1, it is not garanted),
1249          * we have to scan all Infiniband device port and
1250          * find master.
1251          */
1252         for (i = 1; i <= np; ++i) {
1253                 /* Check whether Infiniband port is populated. */
1254                 ifindex = mlx5_nl_ifindex(nl_rdma, ibv_dev->name, i);
1255                 if (!ifindex)
1256                         continue;
1257                 if (!if_indextoname(ifindex, ifname))
1258                         continue;
1259                 /* Try to read bonding slave names from sysfs. */
1260                 MKSTR(slaves,
1261                       "/sys/class/net/%s/master/bonding/slaves", ifname);
1262                 file = fopen(slaves, "r");
1263                 if (file)
1264                         break;
1265         }
1266         if (!file)
1267                 return -1;
1268         /* Use safe format to check maximal buffer length. */
1269         MLX5_ASSERT(atol(RTE_STR(IF_NAMESIZE)) == IF_NAMESIZE);
1270         while (fscanf(file, "%" RTE_STR(IF_NAMESIZE) "s", ifname) == 1) {
1271                 char tmp_str[IF_NAMESIZE + 32];
1272                 struct rte_pci_addr pci_addr;
1273                 struct mlx5_switch_info info;
1274
1275                 /* Process slave interface names in the loop. */
1276                 snprintf(tmp_str, sizeof(tmp_str),
1277                          "/sys/class/net/%s", ifname);
1278                 if (mlx5_dev_to_pci_addr(tmp_str, &pci_addr)) {
1279                         DRV_LOG(WARNING, "can not get PCI address"
1280                                          " for netdev \"%s\"", ifname);
1281                         continue;
1282                 }
1283                 if (pci_dev->addr.domain != pci_addr.domain ||
1284                     pci_dev->addr.bus != pci_addr.bus ||
1285                     pci_dev->addr.devid != pci_addr.devid ||
1286                     pci_dev->addr.function != pci_addr.function)
1287                         continue;
1288                 /* Slave interface PCI address match found. */
1289                 fclose(file);
1290                 snprintf(tmp_str, sizeof(tmp_str),
1291                          "/sys/class/net/%s/phys_port_name", ifname);
1292                 file = fopen(tmp_str, "rb");
1293                 if (!file)
1294                         break;
1295                 info.name_type = MLX5_PHYS_PORT_NAME_TYPE_NOTSET;
1296                 if (fscanf(file, "%32s", tmp_str) == 1)
1297                         mlx5_translate_port_name(tmp_str, &info);
1298                 if (info.name_type == MLX5_PHYS_PORT_NAME_TYPE_LEGACY ||
1299                     info.name_type == MLX5_PHYS_PORT_NAME_TYPE_UPLINK)
1300                         pf = info.port_name;
1301                 break;
1302         }
1303         if (file)
1304                 fclose(file);
1305         return pf;
1306 }
1307
1308 /**
1309  * DPDK callback to register a PCI device.
1310  *
1311  * This function spawns Ethernet devices out of a given PCI device.
1312  *
1313  * @param[in] pci_drv
1314  *   PCI driver structure (mlx5_driver).
1315  * @param[in] pci_dev
1316  *   PCI device information.
1317  *
1318  * @return
1319  *   0 on success, a negative errno value otherwise and rte_errno is set.
1320  */
1321 int
1322 mlx5_os_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
1323                   struct rte_pci_device *pci_dev)
1324 {
1325         struct ibv_device **ibv_list;
1326         /*
1327          * Number of found IB Devices matching with requested PCI BDF.
1328          * nd != 1 means there are multiple IB devices over the same
1329          * PCI device and we have representors and master.
1330          */
1331         unsigned int nd = 0;
1332         /*
1333          * Number of found IB device Ports. nd = 1 and np = 1..n means
1334          * we have the single multiport IB device, and there may be
1335          * representors attached to some of found ports.
1336          */
1337         unsigned int np = 0;
1338         /*
1339          * Number of DPDK ethernet devices to Spawn - either over
1340          * multiple IB devices or multiple ports of single IB device.
1341          * Actually this is the number of iterations to spawn.
1342          */
1343         unsigned int ns = 0;
1344         /*
1345          * Bonding device
1346          *   < 0 - no bonding device (single one)
1347          *  >= 0 - bonding device (value is slave PF index)
1348          */
1349         int bd = -1;
1350         struct mlx5_dev_spawn_data *list = NULL;
1351         struct mlx5_dev_config dev_config;
1352         int ret;
1353
1354         if (mlx5_class_get(pci_dev->device.devargs) != MLX5_CLASS_NET) {
1355                 DRV_LOG(DEBUG, "Skip probing - should be probed by other mlx5"
1356                         " driver.");
1357                 return 1;
1358         }
1359         if (rte_eal_process_type() == RTE_PROC_PRIMARY)
1360                 mlx5_pmd_socket_init();
1361         ret = mlx5_init_once();
1362         if (ret) {
1363                 DRV_LOG(ERR, "unable to init PMD global data: %s",
1364                         strerror(rte_errno));
1365                 return -rte_errno;
1366         }
1367         MLX5_ASSERT(pci_drv == &mlx5_driver);
1368         errno = 0;
1369         ibv_list = mlx5_glue->get_device_list(&ret);
1370         if (!ibv_list) {
1371                 rte_errno = errno ? errno : ENOSYS;
1372                 DRV_LOG(ERR, "cannot list devices, is ib_uverbs loaded?");
1373                 return -rte_errno;
1374         }
1375         /*
1376          * First scan the list of all Infiniband devices to find
1377          * matching ones, gathering into the list.
1378          */
1379         struct ibv_device *ibv_match[ret + 1];
1380         int nl_route = mlx5_nl_init(NETLINK_ROUTE);
1381         int nl_rdma = mlx5_nl_init(NETLINK_RDMA);
1382         unsigned int i;
1383
1384         while (ret-- > 0) {
1385                 struct rte_pci_addr pci_addr;
1386
1387                 DRV_LOG(DEBUG, "checking device \"%s\"", ibv_list[ret]->name);
1388                 bd = mlx5_device_bond_pci_match
1389                                 (ibv_list[ret], pci_dev, nl_rdma);
1390                 if (bd >= 0) {
1391                         /*
1392                          * Bonding device detected. Only one match is allowed,
1393                          * the bonding is supported over multi-port IB device,
1394                          * there should be no matches on representor PCI
1395                          * functions or non VF LAG bonding devices with
1396                          * specified address.
1397                          */
1398                         if (nd) {
1399                                 DRV_LOG(ERR,
1400                                         "multiple PCI match on bonding device"
1401                                         "\"%s\" found", ibv_list[ret]->name);
1402                                 rte_errno = ENOENT;
1403                                 ret = -rte_errno;
1404                                 goto exit;
1405                         }
1406                         DRV_LOG(INFO, "PCI information matches for"
1407                                       " slave %d bonding device \"%s\"",
1408                                       bd, ibv_list[ret]->name);
1409                         ibv_match[nd++] = ibv_list[ret];
1410                         break;
1411                 }
1412                 if (mlx5_dev_to_pci_addr
1413                         (ibv_list[ret]->ibdev_path, &pci_addr))
1414                         continue;
1415                 if (pci_dev->addr.domain != pci_addr.domain ||
1416                     pci_dev->addr.bus != pci_addr.bus ||
1417                     pci_dev->addr.devid != pci_addr.devid ||
1418                     pci_dev->addr.function != pci_addr.function)
1419                         continue;
1420                 DRV_LOG(INFO, "PCI information matches for device \"%s\"",
1421                         ibv_list[ret]->name);
1422                 ibv_match[nd++] = ibv_list[ret];
1423         }
1424         ibv_match[nd] = NULL;
1425         if (!nd) {
1426                 /* No device matches, just complain and bail out. */
1427                 DRV_LOG(WARNING,
1428                         "no Verbs device matches PCI device " PCI_PRI_FMT ","
1429                         " are kernel drivers loaded?",
1430                         pci_dev->addr.domain, pci_dev->addr.bus,
1431                         pci_dev->addr.devid, pci_dev->addr.function);
1432                 rte_errno = ENOENT;
1433                 ret = -rte_errno;
1434                 goto exit;
1435         }
1436         if (nd == 1) {
1437                 /*
1438                  * Found single matching device may have multiple ports.
1439                  * Each port may be representor, we have to check the port
1440                  * number and check the representors existence.
1441                  */
1442                 if (nl_rdma >= 0)
1443                         np = mlx5_nl_portnum(nl_rdma, ibv_match[0]->name);
1444                 if (!np)
1445                         DRV_LOG(WARNING, "can not get IB device \"%s\""
1446                                          " ports number", ibv_match[0]->name);
1447                 if (bd >= 0 && !np) {
1448                         DRV_LOG(ERR, "can not get ports"
1449                                      " for bonding device");
1450                         rte_errno = ENOENT;
1451                         ret = -rte_errno;
1452                         goto exit;
1453                 }
1454         }
1455 #ifndef HAVE_MLX5DV_DR_DEVX_PORT
1456         if (bd >= 0) {
1457                 /*
1458                  * This may happen if there is VF LAG kernel support and
1459                  * application is compiled with older rdma_core library.
1460                  */
1461                 DRV_LOG(ERR,
1462                         "No kernel/verbs support for VF LAG bonding found.");
1463                 rte_errno = ENOTSUP;
1464                 ret = -rte_errno;
1465                 goto exit;
1466         }
1467 #endif
1468         /*
1469          * Now we can determine the maximal
1470          * amount of devices to be spawned.
1471          */
1472         list = rte_zmalloc("device spawn data",
1473                          sizeof(struct mlx5_dev_spawn_data) *
1474                          (np ? np : nd),
1475                          RTE_CACHE_LINE_SIZE);
1476         if (!list) {
1477                 DRV_LOG(ERR, "spawn data array allocation failure");
1478                 rte_errno = ENOMEM;
1479                 ret = -rte_errno;
1480                 goto exit;
1481         }
1482         if (bd >= 0 || np > 1) {
1483                 /*
1484                  * Single IB device with multiple ports found,
1485                  * it may be E-Switch master device and representors.
1486                  * We have to perform identification through the ports.
1487                  */
1488                 MLX5_ASSERT(nl_rdma >= 0);
1489                 MLX5_ASSERT(ns == 0);
1490                 MLX5_ASSERT(nd == 1);
1491                 MLX5_ASSERT(np);
1492                 for (i = 1; i <= np; ++i) {
1493                         list[ns].max_port = np;
1494                         list[ns].ibv_port = i;
1495                         list[ns].ibv_dev = ibv_match[0];
1496                         list[ns].eth_dev = NULL;
1497                         list[ns].pci_dev = pci_dev;
1498                         list[ns].pf_bond = bd;
1499                         list[ns].ifindex = mlx5_nl_ifindex
1500                                         (nl_rdma, list[ns].ibv_dev->name, i);
1501                         if (!list[ns].ifindex) {
1502                                 /*
1503                                  * No network interface index found for the
1504                                  * specified port, it means there is no
1505                                  * representor on this port. It's OK,
1506                                  * there can be disabled ports, for example
1507                                  * if sriov_numvfs < sriov_totalvfs.
1508                                  */
1509                                 continue;
1510                         }
1511                         ret = -1;
1512                         if (nl_route >= 0)
1513                                 ret = mlx5_nl_switch_info
1514                                                (nl_route,
1515                                                 list[ns].ifindex,
1516                                                 &list[ns].info);
1517                         if (ret || (!list[ns].info.representor &&
1518                                     !list[ns].info.master)) {
1519                                 /*
1520                                  * We failed to recognize representors with
1521                                  * Netlink, let's try to perform the task
1522                                  * with sysfs.
1523                                  */
1524                                 ret =  mlx5_sysfs_switch_info
1525                                                 (list[ns].ifindex,
1526                                                  &list[ns].info);
1527                         }
1528                         if (!ret && bd >= 0) {
1529                                 switch (list[ns].info.name_type) {
1530                                 case MLX5_PHYS_PORT_NAME_TYPE_UPLINK:
1531                                         if (list[ns].info.port_name == bd)
1532                                                 ns++;
1533                                         break;
1534                                 case MLX5_PHYS_PORT_NAME_TYPE_PFVF:
1535                                         if (list[ns].info.pf_num == bd)
1536                                                 ns++;
1537                                         break;
1538                                 default:
1539                                         break;
1540                                 }
1541                                 continue;
1542                         }
1543                         if (!ret && (list[ns].info.representor ^
1544                                      list[ns].info.master))
1545                                 ns++;
1546                 }
1547                 if (!ns) {
1548                         DRV_LOG(ERR,
1549                                 "unable to recognize master/representors"
1550                                 " on the IB device with multiple ports");
1551                         rte_errno = ENOENT;
1552                         ret = -rte_errno;
1553                         goto exit;
1554                 }
1555         } else {
1556                 /*
1557                  * The existence of several matching entries (nd > 1) means
1558                  * port representors have been instantiated. No existing Verbs
1559                  * call nor sysfs entries can tell them apart, this can only
1560                  * be done through Netlink calls assuming kernel drivers are
1561                  * recent enough to support them.
1562                  *
1563                  * In the event of identification failure through Netlink,
1564                  * try again through sysfs, then:
1565                  *
1566                  * 1. A single IB device matches (nd == 1) with single
1567                  *    port (np=0/1) and is not a representor, assume
1568                  *    no switch support.
1569                  *
1570                  * 2. Otherwise no safe assumptions can be made;
1571                  *    complain louder and bail out.
1572                  */
1573                 for (i = 0; i != nd; ++i) {
1574                         memset(&list[ns].info, 0, sizeof(list[ns].info));
1575                         list[ns].max_port = 1;
1576                         list[ns].ibv_port = 1;
1577                         list[ns].ibv_dev = ibv_match[i];
1578                         list[ns].eth_dev = NULL;
1579                         list[ns].pci_dev = pci_dev;
1580                         list[ns].pf_bond = -1;
1581                         list[ns].ifindex = 0;
1582                         if (nl_rdma >= 0)
1583                                 list[ns].ifindex = mlx5_nl_ifindex
1584                                         (nl_rdma, list[ns].ibv_dev->name, 1);
1585                         if (!list[ns].ifindex) {
1586                                 char ifname[IF_NAMESIZE];
1587
1588                                 /*
1589                                  * Netlink failed, it may happen with old
1590                                  * ib_core kernel driver (before 4.16).
1591                                  * We can assume there is old driver because
1592                                  * here we are processing single ports IB
1593                                  * devices. Let's try sysfs to retrieve
1594                                  * the ifindex. The method works for
1595                                  * master device only.
1596                                  */
1597                                 if (nd > 1) {
1598                                         /*
1599                                          * Multiple devices found, assume
1600                                          * representors, can not distinguish
1601                                          * master/representor and retrieve
1602                                          * ifindex via sysfs.
1603                                          */
1604                                         continue;
1605                                 }
1606                                 ret = mlx5_get_master_ifname
1607                                         (ibv_match[i]->ibdev_path, &ifname);
1608                                 if (!ret)
1609                                         list[ns].ifindex =
1610                                                 if_nametoindex(ifname);
1611                                 if (!list[ns].ifindex) {
1612                                         /*
1613                                          * No network interface index found
1614                                          * for the specified device, it means
1615                                          * there it is neither representor
1616                                          * nor master.
1617                                          */
1618                                         continue;
1619                                 }
1620                         }
1621                         ret = -1;
1622                         if (nl_route >= 0)
1623                                 ret = mlx5_nl_switch_info
1624                                                (nl_route,
1625                                                 list[ns].ifindex,
1626                                                 &list[ns].info);
1627                         if (ret || (!list[ns].info.representor &&
1628                                     !list[ns].info.master)) {
1629                                 /*
1630                                  * We failed to recognize representors with
1631                                  * Netlink, let's try to perform the task
1632                                  * with sysfs.
1633                                  */
1634                                 ret =  mlx5_sysfs_switch_info
1635                                                 (list[ns].ifindex,
1636                                                  &list[ns].info);
1637                         }
1638                         if (!ret && (list[ns].info.representor ^
1639                                      list[ns].info.master)) {
1640                                 ns++;
1641                         } else if ((nd == 1) &&
1642                                    !list[ns].info.representor &&
1643                                    !list[ns].info.master) {
1644                                 /*
1645                                  * Single IB device with
1646                                  * one physical port and
1647                                  * attached network device.
1648                                  * May be SRIOV is not enabled
1649                                  * or there is no representors.
1650                                  */
1651                                 DRV_LOG(INFO, "no E-Switch support detected");
1652                                 ns++;
1653                                 break;
1654                         }
1655                 }
1656                 if (!ns) {
1657                         DRV_LOG(ERR,
1658                                 "unable to recognize master/representors"
1659                                 " on the multiple IB devices");
1660                         rte_errno = ENOENT;
1661                         ret = -rte_errno;
1662                         goto exit;
1663                 }
1664         }
1665         MLX5_ASSERT(ns);
1666         /*
1667          * Sort list to probe devices in natural order for users convenience
1668          * (i.e. master first, then representors from lowest to highest ID).
1669          */
1670         qsort(list, ns, sizeof(*list), mlx5_dev_spawn_data_cmp);
1671         /* Default configuration. */
1672         dev_config = (struct mlx5_dev_config){
1673                 .hw_padding = 0,
1674                 .mps = MLX5_ARG_UNSET,
1675                 .dbnc = MLX5_ARG_UNSET,
1676                 .rx_vec_en = 1,
1677                 .txq_inline_max = MLX5_ARG_UNSET,
1678                 .txq_inline_min = MLX5_ARG_UNSET,
1679                 .txq_inline_mpw = MLX5_ARG_UNSET,
1680                 .txqs_inline = MLX5_ARG_UNSET,
1681                 .vf_nl_en = 1,
1682                 .mr_ext_memseg_en = 1,
1683                 .mprq = {
1684                         .enabled = 0, /* Disabled by default. */
1685                         .stride_num_n = 0,
1686                         .stride_size_n = 0,
1687                         .max_memcpy_len = MLX5_MPRQ_MEMCPY_DEFAULT_LEN,
1688                         .min_rxqs_num = MLX5_MPRQ_MIN_RXQS,
1689                 },
1690                 .dv_esw_en = 1,
1691                 .dv_flow_en = 1,
1692                 .log_hp_size = MLX5_ARG_UNSET,
1693         };
1694         /* Device specific configuration. */
1695         switch (pci_dev->id.device_id) {
1696         case PCI_DEVICE_ID_MELLANOX_CONNECTX4VF:
1697         case PCI_DEVICE_ID_MELLANOX_CONNECTX4LXVF:
1698         case PCI_DEVICE_ID_MELLANOX_CONNECTX5VF:
1699         case PCI_DEVICE_ID_MELLANOX_CONNECTX5EXVF:
1700         case PCI_DEVICE_ID_MELLANOX_CONNECTX5BFVF:
1701         case PCI_DEVICE_ID_MELLANOX_CONNECTX6VF:
1702         case PCI_DEVICE_ID_MELLANOX_CONNECTX6DXVF:
1703                 dev_config.vf = 1;
1704                 break;
1705         default:
1706                 break;
1707         }
1708         for (i = 0; i != ns; ++i) {
1709                 uint32_t restore;
1710
1711                 list[i].eth_dev = mlx5_dev_spawn(&pci_dev->device,
1712                                                  &list[i],
1713                                                  dev_config);
1714                 if (!list[i].eth_dev) {
1715                         if (rte_errno != EBUSY && rte_errno != EEXIST)
1716                                 break;
1717                         /* Device is disabled or already spawned. Ignore it. */
1718                         continue;
1719                 }
1720                 restore = list[i].eth_dev->data->dev_flags;
1721                 rte_eth_copy_pci_info(list[i].eth_dev, pci_dev);
1722                 /* Restore non-PCI flags cleared by the above call. */
1723                 list[i].eth_dev->data->dev_flags |= restore;
1724                 rte_eth_dev_probing_finish(list[i].eth_dev);
1725         }
1726         if (i != ns) {
1727                 DRV_LOG(ERR,
1728                         "probe of PCI device " PCI_PRI_FMT " aborted after"
1729                         " encountering an error: %s",
1730                         pci_dev->addr.domain, pci_dev->addr.bus,
1731                         pci_dev->addr.devid, pci_dev->addr.function,
1732                         strerror(rte_errno));
1733                 ret = -rte_errno;
1734                 /* Roll back. */
1735                 while (i--) {
1736                         if (!list[i].eth_dev)
1737                                 continue;
1738                         mlx5_dev_close(list[i].eth_dev);
1739                         /* mac_addrs must not be freed because in dev_private */
1740                         list[i].eth_dev->data->mac_addrs = NULL;
1741                         claim_zero(rte_eth_dev_release_port(list[i].eth_dev));
1742                 }
1743                 /* Restore original error. */
1744                 rte_errno = -ret;
1745         } else {
1746                 ret = 0;
1747         }
1748 exit:
1749         /*
1750          * Do the routine cleanup:
1751          * - close opened Netlink sockets
1752          * - free allocated spawn data array
1753          * - free the Infiniband device list
1754          */
1755         if (nl_rdma >= 0)
1756                 close(nl_rdma);
1757         if (nl_route >= 0)
1758                 close(nl_route);
1759         if (list)
1760                 rte_free(list);
1761         MLX5_ASSERT(ibv_list);
1762         mlx5_glue->free_device_list(ibv_list);
1763         return ret;
1764 }
1765
1766 static int
1767 mlx5_config_doorbell_mapping_env(const struct mlx5_dev_config *config)
1768 {
1769         char *env;
1770         int value;
1771
1772         MLX5_ASSERT(rte_eal_process_type() == RTE_PROC_PRIMARY);
1773         /* Get environment variable to store. */
1774         env = getenv(MLX5_SHUT_UP_BF);
1775         value = env ? !!strcmp(env, "0") : MLX5_ARG_UNSET;
1776         if (config->dbnc == MLX5_ARG_UNSET)
1777                 setenv(MLX5_SHUT_UP_BF, MLX5_SHUT_UP_BF_DEFAULT, 1);
1778         else
1779                 setenv(MLX5_SHUT_UP_BF,
1780                        config->dbnc == MLX5_TXDB_NCACHED ? "1" : "0", 1);
1781         return value;
1782 }
1783
1784 static void
1785 mlx5_restore_doorbell_mapping_env(int value)
1786 {
1787         MLX5_ASSERT(rte_eal_process_type() == RTE_PROC_PRIMARY);
1788         /* Restore the original environment variable state. */
1789         if (value == MLX5_ARG_UNSET)
1790                 unsetenv(MLX5_SHUT_UP_BF);
1791         else
1792                 setenv(MLX5_SHUT_UP_BF, value ? "1" : "0", 1);
1793 }
1794
1795 /**
1796  * Extract pdn of PD object using DV API.
1797  *
1798  * @param[in] pd
1799  *   Pointer to the verbs PD object.
1800  * @param[out] pdn
1801  *   Pointer to the PD object number variable.
1802  *
1803  * @return
1804  *   0 on success, error value otherwise.
1805  */
1806 int
1807 mlx5_os_get_pdn(void *pd, uint32_t *pdn)
1808 {
1809 #ifdef HAVE_IBV_FLOW_DV_SUPPORT
1810         struct mlx5dv_obj obj;
1811         struct mlx5dv_pd pd_info;
1812         int ret = 0;
1813
1814         obj.pd.in = pd;
1815         obj.pd.out = &pd_info;
1816         ret = mlx5_glue->dv_init_obj(&obj, MLX5DV_OBJ_PD);
1817         if (ret) {
1818                 DRV_LOG(DEBUG, "Fail to get PD object info");
1819                 return ret;
1820         }
1821         *pdn = pd_info.pdn;
1822         return 0;
1823 #else
1824         (void)pd;
1825         (void)pdn;
1826         return -ENOTSUP;
1827 #endif /* HAVE_IBV_FLOW_DV_SUPPORT */
1828 }
1829
1830 /**
1831  * Function API to open IB device.
1832  *
1833  * This function calls the Linux glue APIs to open a device.
1834  *
1835  * @param[in] spawn
1836  *   Pointer to the IB device attributes (name, port, etc).
1837  * @param[out] config
1838  *   Pointer to device configuration structure.
1839  * @param[out] sh
1840  *   Pointer to shared context structure.
1841  *
1842  * @return
1843  *   0 on success, a positive error value otherwise.
1844  */
1845 int
1846 mlx5_os_open_device(const struct mlx5_dev_spawn_data *spawn,
1847                      const struct mlx5_dev_config *config,
1848                      struct mlx5_dev_ctx_shared *sh)
1849 {
1850         int dbmap_env;
1851         int err = 0;
1852         /*
1853          * Configure environment variable "MLX5_BF_SHUT_UP"
1854          * before the device creation. The rdma_core library
1855          * checks the variable at device creation and
1856          * stores the result internally.
1857          */
1858         dbmap_env = mlx5_config_doorbell_mapping_env(config);
1859         /* Try to open IB device with DV first, then usual Verbs. */
1860         errno = 0;
1861         sh->ctx = mlx5_glue->dv_open_device(spawn->ibv_dev);
1862         if (sh->ctx) {
1863                 sh->devx = 1;
1864                 DRV_LOG(DEBUG, "DevX is supported");
1865                 /* The device is created, no need for environment. */
1866                 mlx5_restore_doorbell_mapping_env(dbmap_env);
1867         } else {
1868                 /* The environment variable is still configured. */
1869                 sh->ctx = mlx5_glue->open_device(spawn->ibv_dev);
1870                 err = errno ? errno : ENODEV;
1871                 /*
1872                  * The environment variable is not needed anymore,
1873                  * all device creation attempts are completed.
1874                  */
1875                 mlx5_restore_doorbell_mapping_env(dbmap_env);
1876                 if (!sh->ctx)
1877                         return err;
1878                 DRV_LOG(DEBUG, "DevX is NOT supported");
1879                 err = 0;
1880         }
1881         return err;
1882 }
1883
1884 /**
1885  * Install shared asynchronous device events handler.
1886  * This function is implemented to support event sharing
1887  * between multiple ports of single IB device.
1888  *
1889  * @param sh
1890  *   Pointer to mlx5_dev_ctx_shared object.
1891  */
1892 void
1893 mlx5_os_dev_shared_handler_install(struct mlx5_dev_ctx_shared *sh)
1894 {
1895         int ret;
1896         int flags;
1897
1898         sh->intr_handle.fd = -1;
1899         flags = fcntl(((struct ibv_context *)sh->ctx)->async_fd, F_GETFL);
1900         ret = fcntl(((struct ibv_context *)sh->ctx)->async_fd,
1901                     F_SETFL, flags | O_NONBLOCK);
1902         if (ret) {
1903                 DRV_LOG(INFO, "failed to change file descriptor async event"
1904                         " queue");
1905         } else {
1906                 sh->intr_handle.fd = ((struct ibv_context *)sh->ctx)->async_fd;
1907                 sh->intr_handle.type = RTE_INTR_HANDLE_EXT;
1908                 if (rte_intr_callback_register(&sh->intr_handle,
1909                                         mlx5_dev_interrupt_handler, sh)) {
1910                         DRV_LOG(INFO, "Fail to install the shared interrupt.");
1911                         sh->intr_handle.fd = -1;
1912                 }
1913         }
1914         if (sh->devx) {
1915 #ifdef HAVE_IBV_DEVX_ASYNC
1916                 sh->intr_handle_devx.fd = -1;
1917                 sh->devx_comp = mlx5_glue->devx_create_cmd_comp(sh->ctx);
1918                 if (!sh->devx_comp) {
1919                         DRV_LOG(INFO, "failed to allocate devx_comp.");
1920                         return;
1921                 }
1922                 flags = fcntl(sh->devx_comp->fd, F_GETFL);
1923                 ret = fcntl(sh->devx_comp->fd, F_SETFL, flags | O_NONBLOCK);
1924                 if (ret) {
1925                         DRV_LOG(INFO, "failed to change file descriptor"
1926                                 " devx comp");
1927                         return;
1928                 }
1929                 sh->intr_handle_devx.fd = sh->devx_comp->fd;
1930                 sh->intr_handle_devx.type = RTE_INTR_HANDLE_EXT;
1931                 if (rte_intr_callback_register(&sh->intr_handle_devx,
1932                                         mlx5_dev_interrupt_handler_devx, sh)) {
1933                         DRV_LOG(INFO, "Fail to install the devx shared"
1934                                 " interrupt.");
1935                         sh->intr_handle_devx.fd = -1;
1936                 }
1937 #endif /* HAVE_IBV_DEVX_ASYNC */
1938         }
1939 }
1940
1941 /**
1942  * Uninstall shared asynchronous device events handler.
1943  * This function is implemented to support event sharing
1944  * between multiple ports of single IB device.
1945  *
1946  * @param dev
1947  *   Pointer to mlx5_dev_ctx_shared object.
1948  */
1949 void
1950 mlx5_os_dev_shared_handler_uninstall(struct mlx5_dev_ctx_shared *sh)
1951 {
1952         if (sh->intr_handle.fd >= 0)
1953                 mlx5_intr_callback_unregister(&sh->intr_handle,
1954                                               mlx5_dev_interrupt_handler, sh);
1955 #ifdef HAVE_IBV_DEVX_ASYNC
1956         if (sh->intr_handle_devx.fd >= 0)
1957                 rte_intr_callback_unregister(&sh->intr_handle_devx,
1958                                   mlx5_dev_interrupt_handler_devx, sh);
1959         if (sh->devx_comp)
1960                 mlx5_glue->devx_destroy_cmd_comp(sh->devx_comp);
1961 #endif
1962 }