drivers/net/mlx5/mlx5.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright 2015 6WIND S.A.
   3  * Copyright 2015 Mellanox Technologies, Ltd
   4  */
   5
   6 #include <stddef.h>
   7 #include <unistd.h>
   8 #include <string.h>
   9 #include <assert.h>
  10 #include <dlfcn.h>
  11 #include <stdint.h>
  12 #include <stdlib.h>
  13 #include <errno.h>
  14 #include <net/if.h>
  15 #include <sys/mman.h>
  16 #include <linux/rtnetlink.h>
  17
  18 /* Verbs header. */
  19 /* ISO C doesn't support unnamed structs/unions, disabling -pedantic. */
  20 #ifdef PEDANTIC
  21 #pragma GCC diagnostic ignored "-Wpedantic"
  22 #endif
  23 #include <infiniband/verbs.h>
  24 #ifdef PEDANTIC
  25 #pragma GCC diagnostic error "-Wpedantic"
  26 #endif
  27
  28 #include <rte_malloc.h>
  29 #include <rte_ethdev_driver.h>
  30 #include <rte_ethdev_pci.h>
  31 #include <rte_pci.h>
  32 #include <rte_bus_pci.h>
  33 #include <rte_common.h>
  34 #include <rte_config.h>
  35 #include <rte_eal_memconfig.h>
  36 #include <rte_kvargs.h>
  37 #include <rte_rwlock.h>
  38 #include <rte_spinlock.h>
  39 #include <rte_string_fns.h>
  40
  41 #include "mlx5.h"
  42 #include "mlx5_utils.h"
  43 #include "mlx5_rxtx.h"
  44 #include "mlx5_autoconf.h"
  45 #include "mlx5_defs.h"
  46 #include "mlx5_glue.h"
  47 #include "mlx5_mr.h"
  48 #include "mlx5_flow.h"
  49
  50 /* Device parameter to enable RX completion queue compression. */
  51 #define MLX5_RXQ_CQE_COMP_EN "rxq_cqe_comp_en"
  52
  53 /* Device parameter to enable RX completion entry padding to 128B. */
  54 #define MLX5_RXQ_CQE_PAD_EN "rxq_cqe_pad_en"
  55
  56 /* Device parameter to enable padding Rx packet to cacheline size. */
  57 #define MLX5_RXQ_PKT_PAD_EN "rxq_pkt_pad_en"
  58
  59 /* Device parameter to enable Multi-Packet Rx queue. */
  60 #define MLX5_RX_MPRQ_EN "mprq_en"
  61
  62 /* Device parameter to configure log 2 of the number of strides for MPRQ. */
  63 #define MLX5_RX_MPRQ_LOG_STRIDE_NUM "mprq_log_stride_num"
  64
  65 /* Device parameter to limit the size of memcpy'd packet for MPRQ. */
  66 #define MLX5_RX_MPRQ_MAX_MEMCPY_LEN "mprq_max_memcpy_len"
  67
  68 /* Device parameter to set the minimum number of Rx queues to enable MPRQ. */
  69 #define MLX5_RXQS_MIN_MPRQ "rxqs_min_mprq"
  70
  71 /* Device parameter to configure inline send. */
  72 #define MLX5_TXQ_INLINE "txq_inline"
  73
  74 /*
  75  * Device parameter to configure the number of TX queues threshold for
  76  * enabling inline send.
  77  */
  78 #define MLX5_TXQS_MIN_INLINE "txqs_min_inline"
  79
  80 /*
  81  * Device parameter to configure the number of TX queues threshold for
  82  * enabling vectorized Tx.
  83  */
  84 #define MLX5_TXQS_MAX_VEC "txqs_max_vec"
  85
  86 /* Device parameter to enable multi-packet send WQEs. */
  87 #define MLX5_TXQ_MPW_EN "txq_mpw_en"
  88
  89 /* Device parameter to include 2 dsegs in the title WQEBB. */
  90 #define MLX5_TXQ_MPW_HDR_DSEG_EN "txq_mpw_hdr_dseg_en"
  91
  92 /* Device parameter to limit the size of inlining packet. */
  93 #define MLX5_TXQ_MAX_INLINE_LEN "txq_max_inline_len"
  94
  95 /* Device parameter to enable hardware Tx vector. */
  96 #define MLX5_TX_VEC_EN "tx_vec_en"
  97
  98 /* Device parameter to enable hardware Rx vector. */
  99 #define MLX5_RX_VEC_EN "rx_vec_en"
 100
 101 /* Allow L3 VXLAN flow creation. */
 102 #define MLX5_L3_VXLAN_EN "l3_vxlan_en"
 103
 104 /* Activate DV E-Switch flow steering. */
 105 #define MLX5_DV_ESW_EN "dv_esw_en"
 106
 107 /* Activate DV flow steering. */
 108 #define MLX5_DV_FLOW_EN "dv_flow_en"
 109
 110 /* Activate Netlink support in VF mode. */
 111 #define MLX5_VF_NL_EN "vf_nl_en"
 112
 113 /* Enable extending memsegs when creating a MR. */
 114 #define MLX5_MR_EXT_MEMSEG_EN "mr_ext_memseg_en"
 115
 116 /* Select port representors to instantiate. */
 117 #define MLX5_REPRESENTOR "representor"
 118
 119 /* Device parameter to configure the maximum number of dump files per queue. */
 120 #define MLX5_MAX_DUMP_FILES_NUM "max_dump_files_num"
 121
 122 #ifndef HAVE_IBV_MLX5_MOD_MPW
 123 #define MLX5DV_CONTEXT_FLAGS_MPW_ALLOWED (1 << 2)
 124 #define MLX5DV_CONTEXT_FLAGS_ENHANCED_MPW (1 << 3)
 125 #endif
 126
 127 #ifndef HAVE_IBV_MLX5_MOD_CQE_128B_COMP
 128 #define MLX5DV_CONTEXT_FLAGS_CQE_128B_COMP (1 << 4)
 129 #endif
 130
 131 static const char *MZ_MLX5_PMD_SHARED_DATA = "mlx5_pmd_shared_data";
 132
 133 /* Shared memory between primary and secondary processes. */
 134 struct mlx5_shared_data *mlx5_shared_data;
 135
 136 /* Spinlock for mlx5_shared_data allocation. */
 137 static rte_spinlock_t mlx5_shared_data_lock = RTE_SPINLOCK_INITIALIZER;
 138
 139 /* Process local data for secondary processes. */
 140 static struct mlx5_local_data mlx5_local_data;
 141
 142 /** Driver-specific log messages type. */
 143 int mlx5_logtype;
 144
 145 /** Data associated with devices to spawn. */
 146 struct mlx5_dev_spawn_data {
 147         uint32_t ifindex; /**< Network interface index. */
 148         uint32_t max_port; /**< IB device maximal port index. */
 149         uint32_t ibv_port; /**< IB device physical port index. */
 150         struct mlx5_switch_info info; /**< Switch information. */
 151         struct ibv_device *ibv_dev; /**< Associated IB device. */
 152         struct rte_eth_dev *eth_dev; /**< Associated Ethernet device. */
 153         struct rte_pci_device *pci_dev; /**< Backend PCI device. */
 154 };
 155
 156 static LIST_HEAD(, mlx5_ibv_shared) mlx5_ibv_list = LIST_HEAD_INITIALIZER();
 157 static pthread_mutex_t mlx5_ibv_list_mutex = PTHREAD_MUTEX_INITIALIZER;
 158
 159 /**
 160  * Allocate shared IB device context. If there is multiport device the
 161  * master and representors will share this context, if there is single
 162  * port dedicated IB device, the context will be used by only given
 163  * port due to unification.
 164  *
 165  * Routine first searches the context for the specified IB device name,
 166  * if found the shared context assumed and reference counter is incremented.
 167  * If no context found the new one is created and initialized with specified
 168  * IB device context and parameters.
 169  *
 170  * @param[in] spawn
 171  *   Pointer to the IB device attributes (name, port, etc).
 172  *
 173  * @return
 174  *   Pointer to mlx5_ibv_shared object on success,
 175  *   otherwise NULL and rte_errno is set.
 176  */
 177 static struct mlx5_ibv_shared *
 178 mlx5_alloc_shared_ibctx(const struct mlx5_dev_spawn_data *spawn)
 179 {
 180         struct mlx5_ibv_shared *sh;
 181         int err = 0;
 182         uint32_t i;
 183
 184         assert(spawn);
 185         /* Secondary process should not create the shared context. */
 186         assert(rte_eal_process_type() == RTE_PROC_PRIMARY);
 187         pthread_mutex_lock(&mlx5_ibv_list_mutex);
 188         /* Search for IB context by device name. */
 189         LIST_FOREACH(sh, &mlx5_ibv_list, next) {
 190                 if (!strcmp(sh->ibdev_name, spawn->ibv_dev->name)) {
 191                         sh->refcnt++;
 192                         goto exit;
 193                 }
 194         }
 195         /* No device found, we have to create new shared context. */
 196         assert(spawn->max_port);
 197         sh = rte_zmalloc("ethdev shared ib context",
 198                          sizeof(struct mlx5_ibv_shared) +
 199                          spawn->max_port *
 200                          sizeof(struct mlx5_ibv_shared_port),
 201                          RTE_CACHE_LINE_SIZE);
 202         if (!sh) {
 203                 DRV_LOG(ERR, "shared context allocation failure");
 204                 rte_errno  = ENOMEM;
 205                 goto exit;
 206         }
 207         /* Try to open IB device with DV first, then usual Verbs. */
 208         errno = 0;
 209         sh->ctx = mlx5_glue->dv_open_device(spawn->ibv_dev);
 210         if (sh->ctx) {
 211                 sh->devx = 1;
 212                 DRV_LOG(DEBUG, "DevX is supported");
 213         } else {
 214                 sh->ctx = mlx5_glue->open_device(spawn->ibv_dev);
 215                 if (!sh->ctx) {
 216                         err = errno ? errno : ENODEV;
 217                         goto error;
 218                 }
 219                 DRV_LOG(DEBUG, "DevX is NOT supported");
 220         }
 221         err = mlx5_glue->query_device_ex(sh->ctx, NULL, &sh->device_attr);
 222         if (err) {
 223                 DRV_LOG(DEBUG, "ibv_query_device_ex() failed");
 224                 goto error;
 225         }
 226         sh->refcnt = 1;
 227         sh->max_port = spawn->max_port;
 228         strncpy(sh->ibdev_name, sh->ctx->device->name,
 229                 sizeof(sh->ibdev_name));
 230         strncpy(sh->ibdev_path, sh->ctx->device->ibdev_path,
 231                 sizeof(sh->ibdev_path));
 232         sh->pci_dev = spawn->pci_dev;
 233         pthread_mutex_init(&sh->intr_mutex, NULL);
 234         /*
 235          * Setting port_id to max unallowed value means
 236          * there is no interrupt subhandler installed for
 237          * the given port index i.
 238          */
 239         for (i = 0; i < sh->max_port; i++)
 240                 sh->port[i].ih_port_id = RTE_MAX_ETHPORTS;
 241         sh->pd = mlx5_glue->alloc_pd(sh->ctx);
 242         if (sh->pd == NULL) {
 243                 DRV_LOG(ERR, "PD allocation failure");
 244                 err = ENOMEM;
 245                 goto error;
 246         }
 247         /*
 248          * Once the device is added to the list of memory event
 249          * callback, its global MR cache table cannot be expanded
 250          * on the fly because of deadlock. If it overflows, lookup
 251          * should be done by searching MR list linearly, which is slow.
 252          *
 253          * At this point the device is not added to the memory
 254          * event list yet, context is just being created.
 255          */
 256         err = mlx5_mr_btree_init(&sh->mr.cache,
 257                                  MLX5_MR_BTREE_CACHE_N * 2,
 258                                  sh->pci_dev->device.numa_node);
 259         if (err) {
 260                 err = rte_errno;
 261                 goto error;
 262         }
 263         LIST_INSERT_HEAD(&mlx5_ibv_list, sh, next);
 264 exit:
 265         pthread_mutex_unlock(&mlx5_ibv_list_mutex);
 266         return sh;
 267 error:
 268         pthread_mutex_unlock(&mlx5_ibv_list_mutex);
 269         assert(sh);
 270         if (sh->pd)
 271                 claim_zero(mlx5_glue->dealloc_pd(sh->pd));
 272         if (sh->ctx)
 273                 claim_zero(mlx5_glue->close_device(sh->ctx));
 274         rte_free(sh);
 275         assert(err > 0);
 276         rte_errno = err;
 277         return NULL;
 278 }
 279
 280 /**
 281  * Free shared IB device context. Decrement counter and if zero free
 282  * all allocated resources and close handles.
 283  *
 284  * @param[in] sh
 285  *   Pointer to mlx5_ibv_shared object to free
 286  */
 287 static void
 288 mlx5_free_shared_ibctx(struct mlx5_ibv_shared *sh)
 289 {
 290         pthread_mutex_lock(&mlx5_ibv_list_mutex);
 291 #ifndef NDEBUG
 292         /* Check the object presence in the list. */
 293         struct mlx5_ibv_shared *lctx;
 294
 295         LIST_FOREACH(lctx, &mlx5_ibv_list, next)
 296                 if (lctx == sh)
 297                         break;
 298         assert(lctx);
 299         if (lctx != sh) {
 300                 DRV_LOG(ERR, "Freeing non-existing shared IB context");
 301                 goto exit;
 302         }
 303 #endif
 304         assert(sh);
 305         assert(sh->refcnt);
 306         /* Secondary process should not free the shared context. */
 307         assert(rte_eal_process_type() == RTE_PROC_PRIMARY);
 308         if (--sh->refcnt)
 309                 goto exit;
 310         /* Release created Memory Regions. */
 311         mlx5_mr_release(sh);
 312         LIST_REMOVE(sh, next);
 313         /*
 314          *  Ensure there is no async event handler installed.
 315          *  Only primary process handles async device events.
 316          **/
 317         assert(!sh->intr_cnt);
 318         if (sh->intr_cnt)
 319                 mlx5_intr_callback_unregister
 320                         (&sh->intr_handle, mlx5_dev_interrupt_handler, sh);
 321         pthread_mutex_destroy(&sh->intr_mutex);
 322         if (sh->pd)
 323                 claim_zero(mlx5_glue->dealloc_pd(sh->pd));
 324         if (sh->ctx)
 325                 claim_zero(mlx5_glue->close_device(sh->ctx));
 326         rte_free(sh);
 327 exit:
 328         pthread_mutex_unlock(&mlx5_ibv_list_mutex);
 329 }
 330
 331 /**
 332  * Initialize DR related data within private structure.
 333  * Routine checks the reference counter and does actual
 334  * resources creation/initialization only if counter is zero.
 335  *
 336  * @param[in] priv
 337  *   Pointer to the private device data structure.
 338  *
 339  * @return
 340  *   Zero on success, positive error code otherwise.
 341  */
 342 static int
 343 mlx5_alloc_shared_dr(struct mlx5_priv *priv)
 344 {
 345 #ifdef HAVE_MLX5DV_DR
 346         struct mlx5_ibv_shared *sh = priv->sh;
 347         int err = 0;
 348         void *domain;
 349
 350         assert(sh);
 351         if (sh->dv_refcnt) {
 352                 /* Shared DV/DR structures is already initialized. */
 353                 sh->dv_refcnt++;
 354                 priv->dr_shared = 1;
 355                 return 0;
 356         }
 357         /* Reference counter is zero, we should initialize structures. */
 358         domain = mlx5_glue->dr_create_domain(sh->ctx,
 359                                              MLX5DV_DR_DOMAIN_TYPE_NIC_RX);
 360         if (!domain) {
 361                 DRV_LOG(ERR, "ingress mlx5dv_dr_create_domain failed");
 362                 err = errno;
 363                 goto error;
 364         }
 365         sh->rx_domain = domain;
 366         domain = mlx5_glue->dr_create_domain(sh->ctx,
 367                                              MLX5DV_DR_DOMAIN_TYPE_NIC_TX);
 368         if (!domain) {
 369                 DRV_LOG(ERR, "egress mlx5dv_dr_create_domain failed");
 370                 err = errno;
 371                 goto error;
 372         }
 373         pthread_mutex_init(&sh->dv_mutex, NULL);
 374         sh->tx_domain = domain;
 375 #ifdef HAVE_MLX5DV_DR_ESWITCH
 376         if (priv->config.dv_esw_en) {
 377                 domain  = mlx5_glue->dr_create_domain
 378                         (sh->ctx, MLX5DV_DR_DOMAIN_TYPE_FDB);
 379                 if (!domain) {
 380                         DRV_LOG(ERR, "FDB mlx5dv_dr_create_domain failed");
 381                         err = errno;
 382                         goto error;
 383                 }
 384                 sh->fdb_domain = domain;
 385                 sh->esw_drop_action = mlx5_glue->dr_create_flow_action_drop();
 386         }
 387 #endif
 388         sh->dv_refcnt++;
 389         priv->dr_shared = 1;
 390         return 0;
 391
 392 error:
 393        /* Rollback the created objects. */
 394         if (sh->rx_domain) {
 395                 mlx5_glue->dr_destroy_domain(sh->rx_domain);
 396                 sh->rx_domain = NULL;
 397         }
 398         if (sh->tx_domain) {
 399                 mlx5_glue->dr_destroy_domain(sh->tx_domain);
 400                 sh->tx_domain = NULL;
 401         }
 402         if (sh->fdb_domain) {
 403                 mlx5_glue->dr_destroy_domain(sh->fdb_domain);
 404                 sh->fdb_domain = NULL;
 405         }
 406         if (sh->esw_drop_action) {
 407                 mlx5_glue->destroy_flow_action(sh->esw_drop_action);
 408                 sh->esw_drop_action = NULL;
 409         }
 410         return err;
 411 #else
 412         (void)priv;
 413         return 0;
 414 #endif
 415 }
 416
 417 /**
 418  * Destroy DR related data within private structure.
 419  *
 420  * @param[in] priv
 421  *   Pointer to the private device data structure.
 422  */
 423 static void
 424 mlx5_free_shared_dr(struct mlx5_priv *priv)
 425 {
 426 #ifdef HAVE_MLX5DV_DR
 427         struct mlx5_ibv_shared *sh;
 428
 429         if (!priv->dr_shared)
 430                 return;
 431         priv->dr_shared = 0;
 432         sh = priv->sh;
 433         assert(sh);
 434         assert(sh->dv_refcnt);
 435         if (sh->dv_refcnt && --sh->dv_refcnt)
 436                 return;
 437         if (sh->rx_domain) {
 438                 mlx5_glue->dr_destroy_domain(sh->rx_domain);
 439                 sh->rx_domain = NULL;
 440         }
 441         if (sh->tx_domain) {
 442                 mlx5_glue->dr_destroy_domain(sh->tx_domain);
 443                 sh->tx_domain = NULL;
 444         }
 445 #ifdef HAVE_MLX5DV_DR_ESWITCH
 446         if (sh->fdb_domain) {
 447                 mlx5_glue->dr_destroy_domain(sh->fdb_domain);
 448                 sh->fdb_domain = NULL;
 449         }
 450         if (sh->esw_drop_action) {
 451                 mlx5_glue->destroy_flow_action(sh->esw_drop_action);
 452                 sh->esw_drop_action = NULL;
 453         }
 454 #endif
 455         pthread_mutex_destroy(&sh->dv_mutex);
 456 #else
 457         (void)priv;
 458 #endif
 459 }
 460
 461 /**
 462  * Initialize shared data between primary and secondary process.
 463  *
 464  * A memzone is reserved by primary process and secondary processes attach to
 465  * the memzone.
 466  *
 467  * @return
 468  *   0 on success, a negative errno value otherwise and rte_errno is set.
 469  */
 470 static int
 471 mlx5_init_shared_data(void)
 472 {
 473         const struct rte_memzone *mz;
 474         int ret = 0;
 475
 476         rte_spinlock_lock(&mlx5_shared_data_lock);
 477         if (mlx5_shared_data == NULL) {
 478                 if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
 479                         /* Allocate shared memory. */
 480                         mz = rte_memzone_reserve(MZ_MLX5_PMD_SHARED_DATA,
 481                                                  sizeof(*mlx5_shared_data),
 482                                                  SOCKET_ID_ANY, 0);
 483                         if (mz == NULL) {
 484                                 DRV_LOG(ERR,
 485                                         "Cannot allocate mlx5 shared data\n");
 486                                 ret = -rte_errno;
 487                                 goto error;
 488                         }
 489                         mlx5_shared_data = mz->addr;
 490                         memset(mlx5_shared_data, 0, sizeof(*mlx5_shared_data));
 491                         rte_spinlock_init(&mlx5_shared_data->lock);
 492                 } else {
 493                         /* Lookup allocated shared memory. */
 494                         mz = rte_memzone_lookup(MZ_MLX5_PMD_SHARED_DATA);
 495                         if (mz == NULL) {
 496                                 DRV_LOG(ERR,
 497                                         "Cannot attach mlx5 shared data\n");
 498                                 ret = -rte_errno;
 499                                 goto error;
 500                         }
 501                         mlx5_shared_data = mz->addr;
 502                         memset(&mlx5_local_data, 0, sizeof(mlx5_local_data));
 503                 }
 504         }
 505 error:
 506         rte_spinlock_unlock(&mlx5_shared_data_lock);
 507         return ret;
 508 }
 509
 510 /**
 511  * Retrieve integer value from environment variable.
 512  *
 513  * @param[in] name
 514  *   Environment variable name.
 515  *
 516  * @return
 517  *   Integer value, 0 if the variable is not set.
 518  */
 519 int
 520 mlx5_getenv_int(const char *name)
 521 {
 522         const char *val = getenv(name);
 523
 524         if (val == NULL)
 525                 return 0;
 526         return atoi(val);
 527 }
 528
 529 /**
 530  * Verbs callback to allocate a memory. This function should allocate the space
 531  * according to the size provided residing inside a huge page.
 532  * Please note that all allocation must respect the alignment from libmlx5
 533  * (i.e. currently sysconf(_SC_PAGESIZE)).
 534  *
 535  * @param[in] size
 536  *   The size in bytes of the memory to allocate.
 537  * @param[in] data
 538  *   A pointer to the callback data.
 539  *
 540  * @return
 541  *   Allocated buffer, NULL otherwise and rte_errno is set.
 542  */
 543 static void *
 544 mlx5_alloc_verbs_buf(size_t size, void *data)
 545 {
 546         struct mlx5_priv *priv = data;
 547         void *ret;
 548         size_t alignment = sysconf(_SC_PAGESIZE);
 549         unsigned int socket = SOCKET_ID_ANY;
 550
 551         if (priv->verbs_alloc_ctx.type == MLX5_VERBS_ALLOC_TYPE_TX_QUEUE) {
 552                 const struct mlx5_txq_ctrl *ctrl = priv->verbs_alloc_ctx.obj;
 553
 554                 socket = ctrl->socket;
 555         } else if (priv->verbs_alloc_ctx.type ==
 556                    MLX5_VERBS_ALLOC_TYPE_RX_QUEUE) {
 557                 const struct mlx5_rxq_ctrl *ctrl = priv->verbs_alloc_ctx.obj;
 558
 559                 socket = ctrl->socket;
 560         }
 561         assert(data != NULL);
 562         ret = rte_malloc_socket(__func__, size, alignment, socket);
 563         if (!ret && size)
 564                 rte_errno = ENOMEM;
 565         return ret;
 566 }
 567
 568 /**
 569  * Verbs callback to free a memory.
 570  *
 571  * @param[in] ptr
 572  *   A pointer to the memory to free.
 573  * @param[in] data
 574  *   A pointer to the callback data.
 575  */
 576 static void
 577 mlx5_free_verbs_buf(void *ptr, void *data __rte_unused)
 578 {
 579         assert(data != NULL);
 580         rte_free(ptr);
 581 }
 582
 583 /**
 584  * Initialize process private data structure.
 585  *
 586  * @param dev
 587  *   Pointer to Ethernet device structure.
 588  *
 589  * @return
 590  *   0 on success, a negative errno value otherwise and rte_errno is set.
 591  */
 592 int
 593 mlx5_proc_priv_init(struct rte_eth_dev *dev)
 594 {
 595         struct mlx5_priv *priv = dev->data->dev_private;
 596         struct mlx5_proc_priv *ppriv;
 597         size_t ppriv_size;
 598
 599         /*
 600          * UAR register table follows the process private structure. BlueFlame
 601          * registers for Tx queues are stored in the table.
 602          */
 603         ppriv_size =
 604                 sizeof(struct mlx5_proc_priv) + priv->txqs_n * sizeof(void *);
 605         ppriv = rte_malloc_socket("mlx5_proc_priv", ppriv_size,
 606                                   RTE_CACHE_LINE_SIZE, dev->device->numa_node);
 607         if (!ppriv) {
 608                 rte_errno = ENOMEM;
 609                 return -rte_errno;
 610         }
 611         ppriv->uar_table_sz = ppriv_size;
 612         dev->process_private = ppriv;
 613         return 0;
 614 }
 615
 616 /**
 617  * Un-initialize process private data structure.
 618  *
 619  * @param dev
 620  *   Pointer to Ethernet device structure.
 621  */
 622 static void
 623 mlx5_proc_priv_uninit(struct rte_eth_dev *dev)
 624 {
 625         if (!dev->process_private)
 626                 return;
 627         rte_free(dev->process_private);
 628         dev->process_private = NULL;
 629 }
 630
 631 /**
 632  * DPDK callback to close the device.
 633  *
 634  * Destroy all queues and objects, free memory.
 635  *
 636  * @param dev
 637  *   Pointer to Ethernet device structure.
 638  */
 639 static void
 640 mlx5_dev_close(struct rte_eth_dev *dev)
 641 {
 642         struct mlx5_priv *priv = dev->data->dev_private;
 643         unsigned int i;
 644         int ret;
 645
 646         DRV_LOG(DEBUG, "port %u closing device \"%s\"",
 647                 dev->data->port_id,
 648                 ((priv->sh->ctx != NULL) ? priv->sh->ctx->device->name : ""));
 649         /* In case mlx5_dev_stop() has not been called. */
 650         mlx5_dev_interrupt_handler_uninstall(dev);
 651         mlx5_traffic_disable(dev);
 652         mlx5_flow_flush(dev, NULL);
 653         /* Prevent crashes when queues are still in use. */
 654         dev->rx_pkt_burst = removed_rx_burst;
 655         dev->tx_pkt_burst = removed_tx_burst;
 656         rte_wmb();
 657         /* Disable datapath on secondary process. */
 658         mlx5_mp_req_stop_rxtx(dev);
 659         if (priv->rxqs != NULL) {
 660                 /* XXX race condition if mlx5_rx_burst() is still running. */
 661                 usleep(1000);
 662                 for (i = 0; (i != priv->rxqs_n); ++i)
 663                         mlx5_rxq_release(dev, i);
 664                 priv->rxqs_n = 0;
 665                 priv->rxqs = NULL;
 666         }
 667         if (priv->txqs != NULL) {
 668                 /* XXX race condition if mlx5_tx_burst() is still running. */
 669                 usleep(1000);
 670                 for (i = 0; (i != priv->txqs_n); ++i)
 671                         mlx5_txq_release(dev, i);
 672                 priv->txqs_n = 0;
 673                 priv->txqs = NULL;
 674         }
 675         mlx5_proc_priv_uninit(dev);
 676         mlx5_mprq_free_mp(dev);
 677         /* Remove from memory callback device list. */
 678         rte_rwlock_write_lock(&mlx5_shared_data->mem_event_rwlock);
 679         assert(priv->sh);
 680         LIST_REMOVE(priv->sh, mem_event_cb);
 681         rte_rwlock_write_unlock(&mlx5_shared_data->mem_event_rwlock);
 682         mlx5_free_shared_dr(priv);
 683         if (priv->rss_conf.rss_key != NULL)
 684                 rte_free(priv->rss_conf.rss_key);
 685         if (priv->reta_idx != NULL)
 686                 rte_free(priv->reta_idx);
 687         if (priv->config.vf)
 688                 mlx5_nl_mac_addr_flush(dev);
 689         if (priv->nl_socket_route >= 0)
 690                 close(priv->nl_socket_route);
 691         if (priv->nl_socket_rdma >= 0)
 692                 close(priv->nl_socket_rdma);
 693         if (priv->sh) {
 694                 /*
 695                  * Free the shared context in last turn, because the cleanup
 696                  * routines above may use some shared fields, like
 697                  * mlx5_nl_mac_addr_flush() uses ibdev_path for retrieveing
 698                  * ifindex if Netlink fails.
 699                  */
 700                 mlx5_free_shared_ibctx(priv->sh);
 701                 priv->sh = NULL;
 702         }
 703         ret = mlx5_hrxq_ibv_verify(dev);
 704         if (ret)
 705                 DRV_LOG(WARNING, "port %u some hash Rx queue still remain",
 706                         dev->data->port_id);
 707         ret = mlx5_ind_table_ibv_verify(dev);
 708         if (ret)
 709                 DRV_LOG(WARNING, "port %u some indirection table still remain",
 710                         dev->data->port_id);
 711         ret = mlx5_rxq_ibv_verify(dev);
 712         if (ret)
 713                 DRV_LOG(WARNING, "port %u some Verbs Rx queue still remain",
 714                         dev->data->port_id);
 715         ret = mlx5_rxq_verify(dev);
 716         if (ret)
 717                 DRV_LOG(WARNING, "port %u some Rx queues still remain",
 718                         dev->data->port_id);
 719         ret = mlx5_txq_ibv_verify(dev);
 720         if (ret)
 721                 DRV_LOG(WARNING, "port %u some Verbs Tx queue still remain",
 722                         dev->data->port_id);
 723         ret = mlx5_txq_verify(dev);
 724         if (ret)
 725                 DRV_LOG(WARNING, "port %u some Tx queues still remain",
 726                         dev->data->port_id);
 727         ret = mlx5_flow_verify(dev);
 728         if (ret)
 729                 DRV_LOG(WARNING, "port %u some flows still remain",
 730                         dev->data->port_id);
 731         if (priv->domain_id != RTE_ETH_DEV_SWITCH_DOMAIN_ID_INVALID) {
 732                 unsigned int c = 0;
 733                 uint16_t port_id;
 734
 735                 RTE_ETH_FOREACH_DEV_OF(port_id, dev->device) {
 736                         struct mlx5_priv *opriv =
 737                                 rte_eth_devices[port_id].data->dev_private;
 738
 739                         if (!opriv ||
 740                             opriv->domain_id != priv->domain_id ||
 741                             &rte_eth_devices[port_id] == dev)
 742                                 continue;
 743                         ++c;
 744                 }
 745                 if (!c)
 746                         claim_zero(rte_eth_switch_domain_free(priv->domain_id));
 747         }
 748         memset(priv, 0, sizeof(*priv));
 749         priv->domain_id = RTE_ETH_DEV_SWITCH_DOMAIN_ID_INVALID;
 750         /*
 751          * Reset mac_addrs to NULL such that it is not freed as part of
 752          * rte_eth_dev_release_port(). mac_addrs is part of dev_private so
 753          * it is freed when dev_private is freed.
 754          */
 755         dev->data->mac_addrs = NULL;
 756 }
 757
 758 const struct eth_dev_ops mlx5_dev_ops = {
 759         .dev_configure = mlx5_dev_configure,
 760         .dev_start = mlx5_dev_start,
 761         .dev_stop = mlx5_dev_stop,
 762         .dev_set_link_down = mlx5_set_link_down,
 763         .dev_set_link_up = mlx5_set_link_up,
 764         .dev_close = mlx5_dev_close,
 765         .promiscuous_enable = mlx5_promiscuous_enable,
 766         .promiscuous_disable = mlx5_promiscuous_disable,
 767         .allmulticast_enable = mlx5_allmulticast_enable,
 768         .allmulticast_disable = mlx5_allmulticast_disable,
 769         .link_update = mlx5_link_update,
 770         .stats_get = mlx5_stats_get,
 771         .stats_reset = mlx5_stats_reset,
 772         .xstats_get = mlx5_xstats_get,
 773         .xstats_reset = mlx5_xstats_reset,
 774         .xstats_get_names = mlx5_xstats_get_names,
 775         .fw_version_get = mlx5_fw_version_get,
 776         .dev_infos_get = mlx5_dev_infos_get,
 777         .read_clock = mlx5_read_clock,
 778         .dev_supported_ptypes_get = mlx5_dev_supported_ptypes_get,
 779         .vlan_filter_set = mlx5_vlan_filter_set,
 780         .rx_queue_setup = mlx5_rx_queue_setup,
 781         .tx_queue_setup = mlx5_tx_queue_setup,
 782         .rx_queue_release = mlx5_rx_queue_release,
 783         .tx_queue_release = mlx5_tx_queue_release,
 784         .flow_ctrl_get = mlx5_dev_get_flow_ctrl,
 785         .flow_ctrl_set = mlx5_dev_set_flow_ctrl,
 786         .mac_addr_remove = mlx5_mac_addr_remove,
 787         .mac_addr_add = mlx5_mac_addr_add,
 788         .mac_addr_set = mlx5_mac_addr_set,
 789         .set_mc_addr_list = mlx5_set_mc_addr_list,
 790         .mtu_set = mlx5_dev_set_mtu,
 791         .vlan_strip_queue_set = mlx5_vlan_strip_queue_set,
 792         .vlan_offload_set = mlx5_vlan_offload_set,
 793         .reta_update = mlx5_dev_rss_reta_update,
 794         .reta_query = mlx5_dev_rss_reta_query,
 795         .rss_hash_update = mlx5_rss_hash_update,
 796         .rss_hash_conf_get = mlx5_rss_hash_conf_get,
 797         .filter_ctrl = mlx5_dev_filter_ctrl,
 798         .rx_descriptor_status = mlx5_rx_descriptor_status,
 799         .tx_descriptor_status = mlx5_tx_descriptor_status,
 800         .rx_queue_count = mlx5_rx_queue_count,
 801         .rx_queue_intr_enable = mlx5_rx_intr_enable,
 802         .rx_queue_intr_disable = mlx5_rx_intr_disable,
 803         .is_removed = mlx5_is_removed,
 804 };
 805
 806 /* Available operations from secondary process. */
 807 static const struct eth_dev_ops mlx5_dev_sec_ops = {
 808         .stats_get = mlx5_stats_get,
 809         .stats_reset = mlx5_stats_reset,
 810         .xstats_get = mlx5_xstats_get,
 811         .xstats_reset = mlx5_xstats_reset,
 812         .xstats_get_names = mlx5_xstats_get_names,
 813         .fw_version_get = mlx5_fw_version_get,
 814         .dev_infos_get = mlx5_dev_infos_get,
 815         .rx_descriptor_status = mlx5_rx_descriptor_status,
 816         .tx_descriptor_status = mlx5_tx_descriptor_status,
 817 };
 818
 819 /* Available operations in flow isolated mode. */
 820 const struct eth_dev_ops mlx5_dev_ops_isolate = {
 821         .dev_configure = mlx5_dev_configure,
 822         .dev_start = mlx5_dev_start,
 823         .dev_stop = mlx5_dev_stop,
 824         .dev_set_link_down = mlx5_set_link_down,
 825         .dev_set_link_up = mlx5_set_link_up,
 826         .dev_close = mlx5_dev_close,
 827         .promiscuous_enable = mlx5_promiscuous_enable,
 828         .promiscuous_disable = mlx5_promiscuous_disable,
 829         .allmulticast_enable = mlx5_allmulticast_enable,
 830         .allmulticast_disable = mlx5_allmulticast_disable,
 831         .link_update = mlx5_link_update,
 832         .stats_get = mlx5_stats_get,
 833         .stats_reset = mlx5_stats_reset,
 834         .xstats_get = mlx5_xstats_get,
 835         .xstats_reset = mlx5_xstats_reset,
 836         .xstats_get_names = mlx5_xstats_get_names,
 837         .fw_version_get = mlx5_fw_version_get,
 838         .dev_infos_get = mlx5_dev_infos_get,
 839         .dev_supported_ptypes_get = mlx5_dev_supported_ptypes_get,
 840         .vlan_filter_set = mlx5_vlan_filter_set,
 841         .rx_queue_setup = mlx5_rx_queue_setup,
 842         .tx_queue_setup = mlx5_tx_queue_setup,
 843         .rx_queue_release = mlx5_rx_queue_release,
 844         .tx_queue_release = mlx5_tx_queue_release,
 845         .flow_ctrl_get = mlx5_dev_get_flow_ctrl,
 846         .flow_ctrl_set = mlx5_dev_set_flow_ctrl,
 847         .mac_addr_remove = mlx5_mac_addr_remove,
 848         .mac_addr_add = mlx5_mac_addr_add,
 849         .mac_addr_set = mlx5_mac_addr_set,
 850         .set_mc_addr_list = mlx5_set_mc_addr_list,
 851         .mtu_set = mlx5_dev_set_mtu,
 852         .vlan_strip_queue_set = mlx5_vlan_strip_queue_set,
 853         .vlan_offload_set = mlx5_vlan_offload_set,
 854         .filter_ctrl = mlx5_dev_filter_ctrl,
 855         .rx_descriptor_status = mlx5_rx_descriptor_status,
 856         .tx_descriptor_status = mlx5_tx_descriptor_status,
 857         .rx_queue_intr_enable = mlx5_rx_intr_enable,
 858         .rx_queue_intr_disable = mlx5_rx_intr_disable,
 859         .is_removed = mlx5_is_removed,
 860 };
 861
 862 /**
 863  * Verify and store value for device argument.
 864  *
 865  * @param[in] key
 866  *   Key argument to verify.
 867  * @param[in] val
 868  *   Value associated with key.
 869  * @param opaque
 870  *   User data.
 871  *
 872  * @return
 873  *   0 on success, a negative errno value otherwise and rte_errno is set.
 874  */
 875 static int
 876 mlx5_args_check(const char *key, const char *val, void *opaque)
 877 {
 878         struct mlx5_dev_config *config = opaque;
 879         unsigned long tmp;
 880
 881         /* No-op, port representors are processed in mlx5_dev_spawn(). */
 882         if (!strcmp(MLX5_REPRESENTOR, key))
 883                 return 0;
 884         errno = 0;
 885         tmp = strtoul(val, NULL, 0);
 886         if (errno) {
 887                 rte_errno = errno;
 888                 DRV_LOG(WARNING, "%s: \"%s\" is not a valid integer", key, val);
 889                 return -rte_errno;
 890         }
 891         if (strcmp(MLX5_RXQ_CQE_COMP_EN, key) == 0) {
 892                 config->cqe_comp = !!tmp;
 893         } else if (strcmp(MLX5_RXQ_CQE_PAD_EN, key) == 0) {
 894                 config->cqe_pad = !!tmp;
 895         } else if (strcmp(MLX5_RXQ_PKT_PAD_EN, key) == 0) {
 896                 config->hw_padding = !!tmp;
 897         } else if (strcmp(MLX5_RX_MPRQ_EN, key) == 0) {
 898                 config->mprq.enabled = !!tmp;
 899         } else if (strcmp(MLX5_RX_MPRQ_LOG_STRIDE_NUM, key) == 0) {
 900                 config->mprq.stride_num_n = tmp;
 901         } else if (strcmp(MLX5_RX_MPRQ_MAX_MEMCPY_LEN, key) == 0) {
 902                 config->mprq.max_memcpy_len = tmp;
 903         } else if (strcmp(MLX5_RXQS_MIN_MPRQ, key) == 0) {
 904                 config->mprq.min_rxqs_num = tmp;
 905         } else if (strcmp(MLX5_TXQ_INLINE, key) == 0) {
 906                 config->txq_inline = tmp;
 907         } else if (strcmp(MLX5_TXQS_MIN_INLINE, key) == 0) {
 908                 config->txqs_inline = tmp;
 909         } else if (strcmp(MLX5_TXQS_MAX_VEC, key) == 0) {
 910                 config->txqs_vec = tmp;
 911         } else if (strcmp(MLX5_TXQ_MPW_EN, key) == 0) {
 912                 config->mps = !!tmp;
 913         } else if (strcmp(MLX5_TXQ_MPW_HDR_DSEG_EN, key) == 0) {
 914                 config->mpw_hdr_dseg = !!tmp;
 915         } else if (strcmp(MLX5_TXQ_MAX_INLINE_LEN, key) == 0) {
 916                 config->inline_max_packet_sz = tmp;
 917         } else if (strcmp(MLX5_TX_VEC_EN, key) == 0) {
 918                 config->tx_vec_en = !!tmp;
 919         } else if (strcmp(MLX5_RX_VEC_EN, key) == 0) {
 920                 config->rx_vec_en = !!tmp;
 921         } else if (strcmp(MLX5_L3_VXLAN_EN, key) == 0) {
 922                 config->l3_vxlan_en = !!tmp;
 923         } else if (strcmp(MLX5_VF_NL_EN, key) == 0) {
 924                 config->vf_nl_en = !!tmp;
 925         } else if (strcmp(MLX5_DV_ESW_EN, key) == 0) {
 926                 config->dv_esw_en = !!tmp;
 927         } else if (strcmp(MLX5_DV_FLOW_EN, key) == 0) {
 928                 config->dv_flow_en = !!tmp;
 929         } else if (strcmp(MLX5_MR_EXT_MEMSEG_EN, key) == 0) {
 930                 config->mr_ext_memseg_en = !!tmp;
 931         } else if (strcmp(MLX5_MAX_DUMP_FILES_NUM, key) == 0) {
 932                 config->max_dump_files_num = tmp;
 933         } else {
 934                 DRV_LOG(WARNING, "%s: unknown parameter", key);
 935                 rte_errno = EINVAL;
 936                 return -rte_errno;
 937         }
 938         return 0;
 939 }
 940
 941 /**
 942  * Parse device parameters.
 943  *
 944  * @param config
 945  *   Pointer to device configuration structure.
 946  * @param devargs
 947  *   Device arguments structure.
 948  *
 949  * @return
 950  *   0 on success, a negative errno value otherwise and rte_errno is set.
 951  */
 952 static int
 953 mlx5_args(struct mlx5_dev_config *config, struct rte_devargs *devargs)
 954 {
 955         const char **params = (const char *[]){
 956                 MLX5_RXQ_CQE_COMP_EN,
 957                 MLX5_RXQ_CQE_PAD_EN,
 958                 MLX5_RXQ_PKT_PAD_EN,
 959                 MLX5_RX_MPRQ_EN,
 960                 MLX5_RX_MPRQ_LOG_STRIDE_NUM,
 961                 MLX5_RX_MPRQ_MAX_MEMCPY_LEN,
 962                 MLX5_RXQS_MIN_MPRQ,
 963                 MLX5_TXQ_INLINE,
 964                 MLX5_TXQS_MIN_INLINE,
 965                 MLX5_TXQS_MAX_VEC,
 966                 MLX5_TXQ_MPW_EN,
 967                 MLX5_TXQ_MPW_HDR_DSEG_EN,
 968                 MLX5_TXQ_MAX_INLINE_LEN,
 969                 MLX5_TX_VEC_EN,
 970                 MLX5_RX_VEC_EN,
 971                 MLX5_L3_VXLAN_EN,
 972                 MLX5_VF_NL_EN,
 973                 MLX5_DV_ESW_EN,
 974                 MLX5_DV_FLOW_EN,
 975                 MLX5_MR_EXT_MEMSEG_EN,
 976                 MLX5_REPRESENTOR,
 977                 MLX5_MAX_DUMP_FILES_NUM,
 978                 NULL,
 979         };
 980         struct rte_kvargs *kvlist;
 981         int ret = 0;
 982         int i;
 983
 984         if (devargs == NULL)
 985                 return 0;
 986         /* Following UGLY cast is done to pass checkpatch. */
 987         kvlist = rte_kvargs_parse(devargs->args, params);
 988         if (kvlist == NULL) {
 989                 rte_errno = EINVAL;
 990                 return -rte_errno;
 991         }
 992         /* Process parameters. */
 993         for (i = 0; (params[i] != NULL); ++i) {
 994                 if (rte_kvargs_count(kvlist, params[i])) {
 995                         ret = rte_kvargs_process(kvlist, params[i],
 996                                                  mlx5_args_check, config);
 997                         if (ret) {
 998                                 rte_errno = EINVAL;
 999                                 rte_kvargs_free(kvlist);
1000                                 return -rte_errno;
1001                         }
1002                 }
1003         }
1004         rte_kvargs_free(kvlist);
1005         return 0;
1006 }
1007
1008 static struct rte_pci_driver mlx5_driver;
1009
1010 /**
1011  * PMD global initialization.
1012  *
1013  * Independent from individual device, this function initializes global
1014  * per-PMD data structures distinguishing primary and secondary processes.
1015  * Hence, each initialization is called once per a process.
1016  *
1017  * @return
1018  *   0 on success, a negative errno value otherwise and rte_errno is set.
1019  */
1020 static int
1021 mlx5_init_once(void)
1022 {
1023         struct mlx5_shared_data *sd;
1024         struct mlx5_local_data *ld = &mlx5_local_data;
1025         int ret = 0;
1026
1027         if (mlx5_init_shared_data())
1028                 return -rte_errno;
1029         sd = mlx5_shared_data;
1030         assert(sd);
1031         rte_spinlock_lock(&sd->lock);
1032         switch (rte_eal_process_type()) {
1033         case RTE_PROC_PRIMARY:
1034                 if (sd->init_done)
1035                         break;
1036                 LIST_INIT(&sd->mem_event_cb_list);
1037                 rte_rwlock_init(&sd->mem_event_rwlock);
1038                 rte_mem_event_callback_register("MLX5_MEM_EVENT_CB",
1039                                                 mlx5_mr_mem_event_cb, NULL);
1040                 ret = mlx5_mp_init_primary();
1041                 if (ret)
1042                         goto out;
1043                 sd->init_done = true;
1044                 break;
1045         case RTE_PROC_SECONDARY:
1046                 if (ld->init_done)
1047                         break;
1048                 ret = mlx5_mp_init_secondary();
1049                 if (ret)
1050                         goto out;
1051                 ++sd->secondary_cnt;
1052                 ld->init_done = true;
1053                 break;
1054         default:
1055                 break;
1056         }
1057 out:
1058         rte_spinlock_unlock(&sd->lock);
1059         return ret;
1060 }
1061
1062 /**
1063  * Spawn an Ethernet device from Verbs information.
1064  *
1065  * @param dpdk_dev
1066  *   Backing DPDK device.
1067  * @param spawn
1068  *   Verbs device parameters (name, port, switch_info) to spawn.
1069  * @param config
1070  *   Device configuration parameters.
1071  *
1072  * @return
1073  *   A valid Ethernet device object on success, NULL otherwise and rte_errno
1074  *   is set. The following errors are defined:
1075  *
1076  *   EBUSY: device is not supposed to be spawned.
1077  *   EEXIST: device is already spawned
1078  */
1079 static struct rte_eth_dev *
1080 mlx5_dev_spawn(struct rte_device *dpdk_dev,
1081                struct mlx5_dev_spawn_data *spawn,
1082                struct mlx5_dev_config config)
1083 {
1084         const struct mlx5_switch_info *switch_info = &spawn->info;
1085         struct mlx5_ibv_shared *sh = NULL;
1086         struct ibv_port_attr port_attr;
1087         struct mlx5dv_context dv_attr = { .comp_mask = 0 };
1088         struct rte_eth_dev *eth_dev = NULL;
1089         struct mlx5_priv *priv = NULL;
1090         int err = 0;
1091         unsigned int hw_padding = 0;
1092         unsigned int mps;
1093         unsigned int cqe_comp;
1094         unsigned int cqe_pad = 0;
1095         unsigned int tunnel_en = 0;
1096         unsigned int mpls_en = 0;
1097         unsigned int swp = 0;
1098         unsigned int mprq = 0;
1099         unsigned int mprq_min_stride_size_n = 0;
1100         unsigned int mprq_max_stride_size_n = 0;
1101         unsigned int mprq_min_stride_num_n = 0;
1102         unsigned int mprq_max_stride_num_n = 0;
1103         struct rte_ether_addr mac;
1104         char name[RTE_ETH_NAME_MAX_LEN];
1105         int own_domain_id = 0;
1106         uint16_t port_id;
1107         unsigned int i;
1108
1109         /* Determine if this port representor is supposed to be spawned. */
1110         if (switch_info->representor && dpdk_dev->devargs) {
1111                 struct rte_eth_devargs eth_da;
1112
1113                 err = rte_eth_devargs_parse(dpdk_dev->devargs->args, &eth_da);
1114                 if (err) {
1115                         rte_errno = -err;
1116                         DRV_LOG(ERR, "failed to process device arguments: %s",
1117                                 strerror(rte_errno));
1118                         return NULL;
1119                 }
1120                 for (i = 0; i < eth_da.nb_representor_ports; ++i)
1121                         if (eth_da.representor_ports[i] ==
1122                             (uint16_t)switch_info->port_name)
1123                                 break;
1124                 if (i == eth_da.nb_representor_ports) {
1125                         rte_errno = EBUSY;
1126                         return NULL;
1127                 }
1128         }
1129         /* Build device name. */
1130         if (!switch_info->representor)
1131                 strlcpy(name, dpdk_dev->name, sizeof(name));
1132         else
1133                 snprintf(name, sizeof(name), "%s_representor_%u",
1134                          dpdk_dev->name, switch_info->port_name);
1135         /* check if the device is already spawned */
1136         if (rte_eth_dev_get_port_by_name(name, &port_id) == 0) {
1137                 rte_errno = EEXIST;
1138                 return NULL;
1139         }
1140         DRV_LOG(DEBUG, "naming Ethernet device \"%s\"", name);
1141         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1142                 eth_dev = rte_eth_dev_attach_secondary(name);
1143                 if (eth_dev == NULL) {
1144                         DRV_LOG(ERR, "can not attach rte ethdev");
1145                         rte_errno = ENOMEM;
1146                         return NULL;
1147                 }
1148                 eth_dev->device = dpdk_dev;
1149                 eth_dev->dev_ops = &mlx5_dev_sec_ops;
1150                 err = mlx5_proc_priv_init(eth_dev);
1151                 if (err)
1152                         return NULL;
1153                 /* Receive command fd from primary process */
1154                 err = mlx5_mp_req_verbs_cmd_fd(eth_dev);
1155                 if (err < 0)
1156                         return NULL;
1157                 /* Remap UAR for Tx queues. */
1158                 err = mlx5_tx_uar_init_secondary(eth_dev, err);
1159                 if (err)
1160                         return NULL;
1161                 /*
1162                  * Ethdev pointer is still required as input since
1163                  * the primary device is not accessible from the
1164                  * secondary process.
1165                  */
1166                 eth_dev->rx_pkt_burst = mlx5_select_rx_function(eth_dev);
1167                 eth_dev->tx_pkt_burst = mlx5_select_tx_function(eth_dev);
1168                 return eth_dev;
1169         }
1170         sh = mlx5_alloc_shared_ibctx(spawn);
1171         if (!sh)
1172                 return NULL;
1173         config.devx = sh->devx;
1174 #ifdef HAVE_IBV_MLX5_MOD_SWP
1175         dv_attr.comp_mask |= MLX5DV_CONTEXT_MASK_SWP;
1176 #endif
1177         /*
1178          * Multi-packet send is supported by ConnectX-4 Lx PF as well
1179          * as all ConnectX-5 devices.
1180          */
1181 #ifdef HAVE_IBV_DEVICE_TUNNEL_SUPPORT
1182         dv_attr.comp_mask |= MLX5DV_CONTEXT_MASK_TUNNEL_OFFLOADS;
1183 #endif
1184 #ifdef HAVE_IBV_DEVICE_STRIDING_RQ_SUPPORT
1185         dv_attr.comp_mask |= MLX5DV_CONTEXT_MASK_STRIDING_RQ;
1186 #endif
1187         mlx5_glue->dv_query_device(sh->ctx, &dv_attr);
1188         if (dv_attr.flags & MLX5DV_CONTEXT_FLAGS_MPW_ALLOWED) {
1189                 if (dv_attr.flags & MLX5DV_CONTEXT_FLAGS_ENHANCED_MPW) {
1190                         DRV_LOG(DEBUG, "enhanced MPW is supported");
1191                         mps = MLX5_MPW_ENHANCED;
1192                 } else {
1193                         DRV_LOG(DEBUG, "MPW is supported");
1194                         mps = MLX5_MPW;
1195                 }
1196         } else {
1197                 DRV_LOG(DEBUG, "MPW isn't supported");
1198                 mps = MLX5_MPW_DISABLED;
1199         }
1200 #ifdef HAVE_IBV_MLX5_MOD_SWP
1201         if (dv_attr.comp_mask & MLX5DV_CONTEXT_MASK_SWP)
1202                 swp = dv_attr.sw_parsing_caps.sw_parsing_offloads;
1203         DRV_LOG(DEBUG, "SWP support: %u", swp);
1204 #endif
1205         config.swp = !!swp;
1206 #ifdef HAVE_IBV_DEVICE_STRIDING_RQ_SUPPORT
1207         if (dv_attr.comp_mask & MLX5DV_CONTEXT_MASK_STRIDING_RQ) {
1208                 struct mlx5dv_striding_rq_caps mprq_caps =
1209                         dv_attr.striding_rq_caps;
1210
1211                 DRV_LOG(DEBUG, "\tmin_single_stride_log_num_of_bytes: %d",
1212                         mprq_caps.min_single_stride_log_num_of_bytes);
1213                 DRV_LOG(DEBUG, "\tmax_single_stride_log_num_of_bytes: %d",
1214                         mprq_caps.max_single_stride_log_num_of_bytes);
1215                 DRV_LOG(DEBUG, "\tmin_single_wqe_log_num_of_strides: %d",
1216                         mprq_caps.min_single_wqe_log_num_of_strides);
1217                 DRV_LOG(DEBUG, "\tmax_single_wqe_log_num_of_strides: %d",
1218                         mprq_caps.max_single_wqe_log_num_of_strides);
1219                 DRV_LOG(DEBUG, "\tsupported_qpts: %d",
1220                         mprq_caps.supported_qpts);
1221                 DRV_LOG(DEBUG, "device supports Multi-Packet RQ");
1222                 mprq = 1;
1223                 mprq_min_stride_size_n =
1224                         mprq_caps.min_single_stride_log_num_of_bytes;
1225                 mprq_max_stride_size_n =
1226                         mprq_caps.max_single_stride_log_num_of_bytes;
1227                 mprq_min_stride_num_n =
1228                         mprq_caps.min_single_wqe_log_num_of_strides;
1229                 mprq_max_stride_num_n =
1230                         mprq_caps.max_single_wqe_log_num_of_strides;
1231                 config.mprq.stride_num_n = RTE_MAX(MLX5_MPRQ_STRIDE_NUM_N,
1232                                                    mprq_min_stride_num_n);
1233         }
1234 #endif
1235         if (RTE_CACHE_LINE_SIZE == 128 &&
1236             !(dv_attr.flags & MLX5DV_CONTEXT_FLAGS_CQE_128B_COMP))
1237                 cqe_comp = 0;
1238         else
1239                 cqe_comp = 1;
1240         config.cqe_comp = cqe_comp;
1241 #ifdef HAVE_IBV_MLX5_MOD_CQE_128B_PAD
1242         /* Whether device supports 128B Rx CQE padding. */
1243         cqe_pad = RTE_CACHE_LINE_SIZE == 128 &&
1244                   (dv_attr.flags & MLX5DV_CONTEXT_FLAGS_CQE_128B_PAD);
1245 #endif
1246 #ifdef HAVE_IBV_DEVICE_TUNNEL_SUPPORT
1247         if (dv_attr.comp_mask & MLX5DV_CONTEXT_MASK_TUNNEL_OFFLOADS) {
1248                 tunnel_en = ((dv_attr.tunnel_offloads_caps &
1249                               MLX5DV_RAW_PACKET_CAP_TUNNELED_OFFLOAD_VXLAN) &&
1250                              (dv_attr.tunnel_offloads_caps &
1251                               MLX5DV_RAW_PACKET_CAP_TUNNELED_OFFLOAD_GRE));
1252         }
1253         DRV_LOG(DEBUG, "tunnel offloading is %ssupported",
1254                 tunnel_en ? "" : "not ");
1255 #else
1256         DRV_LOG(WARNING,
1257                 "tunnel offloading disabled due to old OFED/rdma-core version");
1258 #endif
1259         config.tunnel_en = tunnel_en;
1260 #ifdef HAVE_IBV_DEVICE_MPLS_SUPPORT
1261         mpls_en = ((dv_attr.tunnel_offloads_caps &
1262                     MLX5DV_RAW_PACKET_CAP_TUNNELED_OFFLOAD_CW_MPLS_OVER_GRE) &&
1263                    (dv_attr.tunnel_offloads_caps &
1264                     MLX5DV_RAW_PACKET_CAP_TUNNELED_OFFLOAD_CW_MPLS_OVER_UDP));
1265         DRV_LOG(DEBUG, "MPLS over GRE/UDP tunnel offloading is %ssupported",
1266                 mpls_en ? "" : "not ");
1267 #else
1268         DRV_LOG(WARNING, "MPLS over GRE/UDP tunnel offloading disabled due to"
1269                 " old OFED/rdma-core version or firmware configuration");
1270 #endif
1271         config.mpls_en = mpls_en;
1272         /* Check port status. */
1273         err = mlx5_glue->query_port(sh->ctx, spawn->ibv_port, &port_attr);
1274         if (err) {
1275                 DRV_LOG(ERR, "port query failed: %s", strerror(err));
1276                 goto error;
1277         }
1278         if (port_attr.link_layer != IBV_LINK_LAYER_ETHERNET) {
1279                 DRV_LOG(ERR, "port is not configured in Ethernet mode");
1280                 err = EINVAL;
1281                 goto error;
1282         }
1283         if (port_attr.state != IBV_PORT_ACTIVE)
1284                 DRV_LOG(DEBUG, "port is not active: \"%s\" (%d)",
1285                         mlx5_glue->port_state_str(port_attr.state),
1286                         port_attr.state);
1287         /* Allocate private eth device data. */
1288         priv = rte_zmalloc("ethdev private structure",
1289                            sizeof(*priv),
1290                            RTE_CACHE_LINE_SIZE);
1291         if (priv == NULL) {
1292                 DRV_LOG(ERR, "priv allocation failure");
1293                 err = ENOMEM;
1294                 goto error;
1295         }
1296         priv->sh = sh;
1297         priv->ibv_port = spawn->ibv_port;
1298         priv->mtu = RTE_ETHER_MTU;
1299 #ifndef RTE_ARCH_64
1300         /* Initialize UAR access locks for 32bit implementations. */
1301         rte_spinlock_init(&priv->uar_lock_cq);
1302         for (i = 0; i < MLX5_UAR_PAGE_NUM_MAX; i++)
1303                 rte_spinlock_init(&priv->uar_lock[i]);
1304 #endif
1305         /* Some internal functions rely on Netlink sockets, open them now. */
1306         priv->nl_socket_rdma = mlx5_nl_init(NETLINK_RDMA);
1307         priv->nl_socket_route = mlx5_nl_init(NETLINK_ROUTE);
1308         priv->nl_sn = 0;
1309         priv->representor = !!switch_info->representor;
1310         priv->master = !!switch_info->master;
1311         priv->domain_id = RTE_ETH_DEV_SWITCH_DOMAIN_ID_INVALID;
1312         /*
1313          * Currently we support single E-Switch per PF configurations
1314          * only and vport_id field contains the vport index for
1315          * associated VF, which is deduced from representor port name.
1316          * For example, let's have the IB device port 10, it has
1317          * attached network device eth0, which has port name attribute
1318          * pf0vf2, we can deduce the VF number as 2, and set vport index
1319          * as 3 (2+1). This assigning schema should be changed if the
1320          * multiple E-Switch instances per PF configurations or/and PCI
1321          * subfunctions are added.
1322          */
1323         priv->vport_id = switch_info->representor ?
1324                          switch_info->port_name + 1 : -1;
1325         /* representor_id field keeps the unmodified port/VF index. */
1326         priv->representor_id = switch_info->representor ?
1327                                switch_info->port_name : -1;
1328         /*
1329          * Look for sibling devices in order to reuse their switch domain
1330          * if any, otherwise allocate one.
1331          */
1332         RTE_ETH_FOREACH_DEV_OF(port_id, dpdk_dev) {
1333                 const struct mlx5_priv *opriv =
1334                         rte_eth_devices[port_id].data->dev_private;
1335
1336                 if (!opriv ||
1337                         opriv->domain_id ==
1338                         RTE_ETH_DEV_SWITCH_DOMAIN_ID_INVALID)
1339                         continue;
1340                 priv->domain_id = opriv->domain_id;
1341                 break;
1342         }
1343         if (priv->domain_id == RTE_ETH_DEV_SWITCH_DOMAIN_ID_INVALID) {
1344                 err = rte_eth_switch_domain_alloc(&priv->domain_id);
1345                 if (err) {
1346                         err = rte_errno;
1347                         DRV_LOG(ERR, "unable to allocate switch domain: %s",
1348                                 strerror(rte_errno));
1349                         goto error;
1350                 }
1351                 own_domain_id = 1;
1352         }
1353         err = mlx5_args(&config, dpdk_dev->devargs);
1354         if (err) {
1355                 err = rte_errno;
1356                 DRV_LOG(ERR, "failed to process device arguments: %s",
1357                         strerror(rte_errno));
1358                 goto error;
1359         }
1360         config.hw_csum = !!(sh->device_attr.device_cap_flags_ex &
1361                             IBV_DEVICE_RAW_IP_CSUM);
1362         DRV_LOG(DEBUG, "checksum offloading is %ssupported",
1363                 (config.hw_csum ? "" : "not "));
1364 #if !defined(HAVE_IBV_DEVICE_COUNTERS_SET_V42) && \
1365         !defined(HAVE_IBV_DEVICE_COUNTERS_SET_V45)
1366         DRV_LOG(DEBUG, "counters are not supported");
1367 #endif
1368 #ifndef HAVE_IBV_FLOW_DV_SUPPORT
1369         if (config.dv_flow_en) {
1370                 DRV_LOG(WARNING, "DV flow is not supported");
1371                 config.dv_flow_en = 0;
1372         }
1373 #endif
1374         config.ind_table_max_size =
1375                 sh->device_attr.rss_caps.max_rwq_indirection_table_size;
1376         /*
1377          * Remove this check once DPDK supports larger/variable
1378          * indirection tables.
1379          */
1380         if (config.ind_table_max_size > (unsigned int)ETH_RSS_RETA_SIZE_512)
1381                 config.ind_table_max_size = ETH_RSS_RETA_SIZE_512;
1382         DRV_LOG(DEBUG, "maximum Rx indirection table size is %u",
1383                 config.ind_table_max_size);
1384         config.hw_vlan_strip = !!(sh->device_attr.raw_packet_caps &
1385                                   IBV_RAW_PACKET_CAP_CVLAN_STRIPPING);
1386         DRV_LOG(DEBUG, "VLAN stripping is %ssupported",
1387                 (config.hw_vlan_strip ? "" : "not "));
1388         config.hw_fcs_strip = !!(sh->device_attr.raw_packet_caps &
1389                                  IBV_RAW_PACKET_CAP_SCATTER_FCS);
1390         DRV_LOG(DEBUG, "FCS stripping configuration is %ssupported",
1391                 (config.hw_fcs_strip ? "" : "not "));
1392 #if defined(HAVE_IBV_WQ_FLAG_RX_END_PADDING)
1393         hw_padding = !!sh->device_attr.rx_pad_end_addr_align;
1394 #elif defined(HAVE_IBV_WQ_FLAGS_PCI_WRITE_END_PADDING)
1395         hw_padding = !!(sh->device_attr.device_cap_flags_ex &
1396                         IBV_DEVICE_PCI_WRITE_END_PADDING);
1397 #endif
1398         if (config.hw_padding && !hw_padding) {
1399                 DRV_LOG(DEBUG, "Rx end alignment padding isn't supported");
1400                 config.hw_padding = 0;
1401         } else if (config.hw_padding) {
1402                 DRV_LOG(DEBUG, "Rx end alignment padding is enabled");
1403         }
1404         config.tso = (sh->device_attr.tso_caps.max_tso > 0 &&
1405                       (sh->device_attr.tso_caps.supported_qpts &
1406                        (1 << IBV_QPT_RAW_PACKET)));
1407         if (config.tso)
1408                 config.tso_max_payload_sz = sh->device_attr.tso_caps.max_tso;
1409         /*
1410          * MPW is disabled by default, while the Enhanced MPW is enabled
1411          * by default.
1412          */
1413         if (config.mps == MLX5_ARG_UNSET)
1414                 config.mps = (mps == MLX5_MPW_ENHANCED) ? MLX5_MPW_ENHANCED :
1415                                                           MLX5_MPW_DISABLED;
1416         else
1417                 config.mps = config.mps ? mps : MLX5_MPW_DISABLED;
1418         DRV_LOG(INFO, "%sMPS is %s",
1419                 config.mps == MLX5_MPW_ENHANCED ? "enhanced " : "",
1420                 config.mps != MLX5_MPW_DISABLED ? "enabled" : "disabled");
1421         if (config.cqe_comp && !cqe_comp) {
1422                 DRV_LOG(WARNING, "Rx CQE compression isn't supported");
1423                 config.cqe_comp = 0;
1424         }
1425         if (config.cqe_pad && !cqe_pad) {
1426                 DRV_LOG(WARNING, "Rx CQE padding isn't supported");
1427                 config.cqe_pad = 0;
1428         } else if (config.cqe_pad) {
1429                 DRV_LOG(INFO, "Rx CQE padding is enabled");
1430         }
1431         if (config.mprq.enabled && mprq) {
1432                 if (config.mprq.stride_num_n > mprq_max_stride_num_n ||
1433                     config.mprq.stride_num_n < mprq_min_stride_num_n) {
1434                         config.mprq.stride_num_n =
1435                                 RTE_MAX(MLX5_MPRQ_STRIDE_NUM_N,
1436                                         mprq_min_stride_num_n);
1437                         DRV_LOG(WARNING,
1438                                 "the number of strides"
1439                                 " for Multi-Packet RQ is out of range,"
1440                                 " setting default value (%u)",
1441                                 1 << config.mprq.stride_num_n);
1442                 }
1443                 config.mprq.min_stride_size_n = mprq_min_stride_size_n;
1444                 config.mprq.max_stride_size_n = mprq_max_stride_size_n;
1445         } else if (config.mprq.enabled && !mprq) {
1446                 DRV_LOG(WARNING, "Multi-Packet RQ isn't supported");
1447                 config.mprq.enabled = 0;
1448         }
1449         if (config.max_dump_files_num == 0)
1450                 config.max_dump_files_num = 128;
1451         eth_dev = rte_eth_dev_allocate(name);
1452         if (eth_dev == NULL) {
1453                 DRV_LOG(ERR, "can not allocate rte ethdev");
1454                 err = ENOMEM;
1455                 goto error;
1456         }
1457         /* Flag to call rte_eth_dev_release_port() in rte_eth_dev_close(). */
1458         eth_dev->data->dev_flags |= RTE_ETH_DEV_CLOSE_REMOVE;
1459         if (priv->representor) {
1460                 eth_dev->data->dev_flags |= RTE_ETH_DEV_REPRESENTOR;
1461                 eth_dev->data->representor_id = priv->representor_id;
1462         }
1463         eth_dev->data->dev_private = priv;
1464         priv->dev_data = eth_dev->data;
1465         eth_dev->data->mac_addrs = priv->mac;
1466         eth_dev->device = dpdk_dev;
1467         /* Configure the first MAC address by default. */
1468         if (mlx5_get_mac(eth_dev, &mac.addr_bytes)) {
1469                 DRV_LOG(ERR,
1470                         "port %u cannot get MAC address, is mlx5_en"
1471                         " loaded? (errno: %s)",
1472                         eth_dev->data->port_id, strerror(rte_errno));
1473                 err = ENODEV;
1474                 goto error;
1475         }
1476         DRV_LOG(INFO,
1477                 "port %u MAC address is %02x:%02x:%02x:%02x:%02x:%02x",
1478                 eth_dev->data->port_id,
1479                 mac.addr_bytes[0], mac.addr_bytes[1],
1480                 mac.addr_bytes[2], mac.addr_bytes[3],
1481                 mac.addr_bytes[4], mac.addr_bytes[5]);
1482 #ifndef NDEBUG
1483         {
1484                 char ifname[IF_NAMESIZE];
1485
1486                 if (mlx5_get_ifname(eth_dev, &ifname) == 0)
1487                         DRV_LOG(DEBUG, "port %u ifname is \"%s\"",
1488                                 eth_dev->data->port_id, ifname);
1489                 else
1490                         DRV_LOG(DEBUG, "port %u ifname is unknown",
1491                                 eth_dev->data->port_id);
1492         }
1493 #endif
1494         /* Get actual MTU if possible. */
1495         err = mlx5_get_mtu(eth_dev, &priv->mtu);
1496         if (err) {
1497                 err = rte_errno;
1498                 goto error;
1499         }
1500         DRV_LOG(DEBUG, "port %u MTU is %u", eth_dev->data->port_id,
1501                 priv->mtu);
1502         /* Initialize burst functions to prevent crashes before link-up. */
1503         eth_dev->rx_pkt_burst = removed_rx_burst;
1504         eth_dev->tx_pkt_burst = removed_tx_burst;
1505         eth_dev->dev_ops = &mlx5_dev_ops;
1506         /* Register MAC address. */
1507         claim_zero(mlx5_mac_addr_add(eth_dev, &mac, 0, 0));
1508         if (config.vf && config.vf_nl_en)
1509                 mlx5_nl_mac_addr_sync(eth_dev);
1510         TAILQ_INIT(&priv->flows);
1511         TAILQ_INIT(&priv->ctrl_flows);
1512         /* Hint libmlx5 to use PMD allocator for data plane resources */
1513         struct mlx5dv_ctx_allocators alctr = {
1514                 .alloc = &mlx5_alloc_verbs_buf,
1515                 .free = &mlx5_free_verbs_buf,
1516                 .data = priv,
1517         };
1518         mlx5_glue->dv_set_context_attr(sh->ctx,
1519                                        MLX5DV_CTX_ATTR_BUF_ALLOCATORS,
1520                                        (void *)((uintptr_t)&alctr));
1521         /* Bring Ethernet device up. */
1522         DRV_LOG(DEBUG, "port %u forcing Ethernet interface up",
1523                 eth_dev->data->port_id);
1524         mlx5_set_link_up(eth_dev);
1525         /*
1526          * Even though the interrupt handler is not installed yet,
1527          * interrupts will still trigger on the async_fd from
1528          * Verbs context returned by ibv_open_device().
1529          */
1530         mlx5_link_update(eth_dev, 0);
1531 #ifdef HAVE_IBV_DEVX_OBJ
1532         if (config.devx) {
1533                 err = mlx5_devx_cmd_query_hca_attr(sh->ctx, &config.hca_attr);
1534                 if (err) {
1535                         err = -err;
1536                         goto error;
1537                 }
1538         }
1539 #endif
1540 #ifdef HAVE_MLX5DV_DR_ESWITCH
1541         if (!(config.hca_attr.eswitch_manager && config.dv_flow_en &&
1542               (switch_info->representor || switch_info->master)))
1543                 config.dv_esw_en = 0;
1544 #else
1545         config.dv_esw_en = 0;
1546 #endif
1547         /* Store device configuration on private structure. */
1548         priv->config = config;
1549         if (config.dv_flow_en) {
1550                 err = mlx5_alloc_shared_dr(priv);
1551                 if (err)
1552                         goto error;
1553         }
1554         /* Supported Verbs flow priority number detection. */
1555         err = mlx5_flow_discover_priorities(eth_dev);
1556         if (err < 0) {
1557                 err = -err;
1558                 goto error;
1559         }
1560         priv->config.flow_prio = err;
1561         /* Add device to memory callback list. */
1562         rte_rwlock_write_lock(&mlx5_shared_data->mem_event_rwlock);
1563         LIST_INSERT_HEAD(&mlx5_shared_data->mem_event_cb_list,
1564                          sh, mem_event_cb);
1565         rte_rwlock_write_unlock(&mlx5_shared_data->mem_event_rwlock);
1566         return eth_dev;
1567 error:
1568         if (priv) {
1569                 if (priv->sh)
1570                         mlx5_free_shared_dr(priv);
1571                 if (priv->nl_socket_route >= 0)
1572                         close(priv->nl_socket_route);
1573                 if (priv->nl_socket_rdma >= 0)
1574                         close(priv->nl_socket_rdma);
1575                 if (own_domain_id)
1576                         claim_zero(rte_eth_switch_domain_free(priv->domain_id));
1577                 rte_free(priv);
1578                 if (eth_dev != NULL)
1579                         eth_dev->data->dev_private = NULL;
1580         }
1581         if (eth_dev != NULL) {
1582                 /* mac_addrs must not be freed alone because part of dev_private */
1583                 eth_dev->data->mac_addrs = NULL;
1584                 rte_eth_dev_release_port(eth_dev);
1585         }
1586         if (sh)
1587                 mlx5_free_shared_ibctx(sh);
1588         assert(err > 0);
1589         rte_errno = err;
1590         return NULL;
1591 }
1592
1593 /**
1594  * Comparison callback to sort device data.
1595  *
1596  * This is meant to be used with qsort().
1597  *
1598  * @param a[in]
1599  *   Pointer to pointer to first data object.
1600  * @param b[in]
1601  *   Pointer to pointer to second data object.
1602  *
1603  * @return
1604  *   0 if both objects are equal, less than 0 if the first argument is less
1605  *   than the second, greater than 0 otherwise.
1606  */
1607 static int
1608 mlx5_dev_spawn_data_cmp(const void *a, const void *b)
1609 {
1610         const struct mlx5_switch_info *si_a =
1611                 &((const struct mlx5_dev_spawn_data *)a)->info;
1612         const struct mlx5_switch_info *si_b =
1613                 &((const struct mlx5_dev_spawn_data *)b)->info;
1614         int ret;
1615
1616         /* Master device first. */
1617         ret = si_b->master - si_a->master;
1618         if (ret)
1619                 return ret;
1620         /* Then representor devices. */
1621         ret = si_b->representor - si_a->representor;
1622         if (ret)
1623                 return ret;
1624         /* Unidentified devices come last in no specific order. */
1625         if (!si_a->representor)
1626                 return 0;
1627         /* Order representors by name. */
1628         return si_a->port_name - si_b->port_name;
1629 }
1630
1631 /**
1632  * DPDK callback to register a PCI device.
1633  *
1634  * This function spawns Ethernet devices out of a given PCI device.
1635  *
1636  * @param[in] pci_drv
1637  *   PCI driver structure (mlx5_driver).
1638  * @param[in] pci_dev
1639  *   PCI device information.
1640  *
1641  * @return
1642  *   0 on success, a negative errno value otherwise and rte_errno is set.
1643  */
1644 static int
1645 mlx5_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
1646                struct rte_pci_device *pci_dev)
1647 {
1648         struct ibv_device **ibv_list;
1649         /*
1650          * Number of found IB Devices matching with requested PCI BDF.
1651          * nd != 1 means there are multiple IB devices over the same
1652          * PCI device and we have representors and master.
1653          */
1654         unsigned int nd = 0;
1655         /*
1656          * Number of found IB device Ports. nd = 1 and np = 1..n means
1657          * we have the single multiport IB device, and there may be
1658          * representors attached to some of found ports.
1659          */
1660         unsigned int np = 0;
1661         /*
1662          * Number of DPDK ethernet devices to Spawn - either over
1663          * multiple IB devices or multiple ports of single IB device.
1664          * Actually this is the number of iterations to spawn.
1665          */
1666         unsigned int ns = 0;
1667         struct mlx5_dev_config dev_config;
1668         int ret;
1669
1670         ret = mlx5_init_once();
1671         if (ret) {
1672                 DRV_LOG(ERR, "unable to init PMD global data: %s",
1673                         strerror(rte_errno));
1674                 return -rte_errno;
1675         }
1676         assert(pci_drv == &mlx5_driver);
1677         errno = 0;
1678         ibv_list = mlx5_glue->get_device_list(&ret);
1679         if (!ibv_list) {
1680                 rte_errno = errno ? errno : ENOSYS;
1681                 DRV_LOG(ERR, "cannot list devices, is ib_uverbs loaded?");
1682                 return -rte_errno;
1683         }
1684         /*
1685          * First scan the list of all Infiniband devices to find
1686          * matching ones, gathering into the list.
1687          */
1688         struct ibv_device *ibv_match[ret + 1];
1689         int nl_route = -1;
1690         int nl_rdma = -1;
1691         unsigned int i;
1692
1693         while (ret-- > 0) {
1694                 struct rte_pci_addr pci_addr;
1695
1696                 DRV_LOG(DEBUG, "checking device \"%s\"", ibv_list[ret]->name);
1697                 if (mlx5_ibv_device_to_pci_addr(ibv_list[ret], &pci_addr))
1698                         continue;
1699                 if (pci_dev->addr.domain != pci_addr.domain ||
1700                     pci_dev->addr.bus != pci_addr.bus ||
1701                     pci_dev->addr.devid != pci_addr.devid ||
1702                     pci_dev->addr.function != pci_addr.function)
1703                         continue;
1704                 DRV_LOG(INFO, "PCI information matches for device \"%s\"",
1705                         ibv_list[ret]->name);
1706                 ibv_match[nd++] = ibv_list[ret];
1707         }
1708         ibv_match[nd] = NULL;
1709         if (!nd) {
1710                 /* No device matches, just complain and bail out. */
1711                 mlx5_glue->free_device_list(ibv_list);
1712                 DRV_LOG(WARNING,
1713                         "no Verbs device matches PCI device " PCI_PRI_FMT ","
1714                         " are kernel drivers loaded?",
1715                         pci_dev->addr.domain, pci_dev->addr.bus,
1716                         pci_dev->addr.devid, pci_dev->addr.function);
1717                 rte_errno = ENOENT;
1718                 ret = -rte_errno;
1719                 return ret;
1720         }
1721         nl_route = mlx5_nl_init(NETLINK_ROUTE);
1722         nl_rdma = mlx5_nl_init(NETLINK_RDMA);
1723         if (nd == 1) {
1724                 /*
1725                  * Found single matching device may have multiple ports.
1726                  * Each port may be representor, we have to check the port
1727                  * number and check the representors existence.
1728                  */
1729                 if (nl_rdma >= 0)
1730                         np = mlx5_nl_portnum(nl_rdma, ibv_match[0]->name);
1731                 if (!np)
1732                         DRV_LOG(WARNING, "can not get IB device \"%s\""
1733                                          " ports number", ibv_match[0]->name);
1734         }
1735         /*
1736          * Now we can determine the maximal
1737          * amount of devices to be spawned.
1738          */
1739         struct mlx5_dev_spawn_data list[np ? np : nd];
1740
1741         if (np > 1) {
1742                 /*
1743                  * Single IB device with multiple ports found,
1744                  * it may be E-Switch master device and representors.
1745                  * We have to perform identification trough the ports.
1746                  */
1747                 assert(nl_rdma >= 0);
1748                 assert(ns == 0);
1749                 assert(nd == 1);
1750                 for (i = 1; i <= np; ++i) {
1751                         list[ns].max_port = np;
1752                         list[ns].ibv_port = i;
1753                         list[ns].ibv_dev = ibv_match[0];
1754                         list[ns].eth_dev = NULL;
1755                         list[ns].pci_dev = pci_dev;
1756                         list[ns].ifindex = mlx5_nl_ifindex
1757                                         (nl_rdma, list[ns].ibv_dev->name, i);
1758                         if (!list[ns].ifindex) {
1759                                 /*
1760                                  * No network interface index found for the
1761                                  * specified port, it means there is no
1762                                  * representor on this port. It's OK,
1763                                  * there can be disabled ports, for example
1764                                  * if sriov_numvfs < sriov_totalvfs.
1765                                  */
1766                                 continue;
1767                         }
1768                         ret = -1;
1769                         if (nl_route >= 0)
1770                                 ret = mlx5_nl_switch_info
1771                                                (nl_route,
1772                                                 list[ns].ifindex,
1773                                                 &list[ns].info);
1774                         if (ret || (!list[ns].info.representor &&
1775                                     !list[ns].info.master)) {
1776                                 /*
1777                                  * We failed to recognize representors with
1778                                  * Netlink, let's try to perform the task
1779                                  * with sysfs.
1780                                  */
1781                                 ret =  mlx5_sysfs_switch_info
1782                                                 (list[ns].ifindex,
1783                                                  &list[ns].info);
1784                         }
1785                         if (!ret && (list[ns].info.representor ^
1786                                      list[ns].info.master))
1787                                 ns++;
1788                 }
1789                 if (!ns) {
1790                         DRV_LOG(ERR,
1791                                 "unable to recognize master/representors"
1792                                 " on the IB device with multiple ports");
1793                         rte_errno = ENOENT;
1794                         ret = -rte_errno;
1795                         goto exit;
1796                 }
1797         } else {
1798                 /*
1799                  * The existence of several matching entries (nd > 1) means
1800                  * port representors have been instantiated. No existing Verbs
1801                  * call nor sysfs entries can tell them apart, this can only
1802                  * be done through Netlink calls assuming kernel drivers are
1803                  * recent enough to support them.
1804                  *
1805                  * In the event of identification failure through Netlink,
1806                  * try again through sysfs, then:
1807                  *
1808                  * 1. A single IB device matches (nd == 1) with single
1809                  *    port (np=0/1) and is not a representor, assume
1810                  *    no switch support.
1811                  *
1812                  * 2. Otherwise no safe assumptions can be made;
1813                  *    complain louder and bail out.
1814                  */
1815                 np = 1;
1816                 for (i = 0; i != nd; ++i) {
1817                         memset(&list[ns].info, 0, sizeof(list[ns].info));
1818                         list[ns].max_port = 1;
1819                         list[ns].ibv_port = 1;
1820                         list[ns].ibv_dev = ibv_match[i];
1821                         list[ns].eth_dev = NULL;
1822                         list[ns].pci_dev = pci_dev;
1823                         list[ns].ifindex = 0;
1824                         if (nl_rdma >= 0)
1825                                 list[ns].ifindex = mlx5_nl_ifindex
1826                                         (nl_rdma, list[ns].ibv_dev->name, 1);
1827                         if (!list[ns].ifindex) {
1828                                 char ifname[IF_NAMESIZE];
1829
1830                                 /*
1831                                  * Netlink failed, it may happen with old
1832                                  * ib_core kernel driver (before 4.16).
1833                                  * We can assume there is old driver because
1834                                  * here we are processing single ports IB
1835                                  * devices. Let's try sysfs to retrieve
1836                                  * the ifindex. The method works for
1837                                  * master device only.
1838                                  */
1839                                 if (nd > 1) {
1840                                         /*
1841                                          * Multiple devices found, assume
1842                                          * representors, can not distinguish
1843                                          * master/representor and retrieve
1844                                          * ifindex via sysfs.
1845                                          */
1846                                         continue;
1847                                 }
1848                                 ret = mlx5_get_master_ifname
1849                                         (ibv_match[i]->ibdev_path, &ifname);
1850                                 if (!ret)
1851                                         list[ns].ifindex =
1852                                                 if_nametoindex(ifname);
1853                                 if (!list[ns].ifindex) {
1854                                         /*
1855                                          * No network interface index found
1856                                          * for the specified device, it means
1857                                          * there it is neither representor
1858                                          * nor master.
1859                                          */
1860                                         continue;
1861                                 }
1862                         }
1863                         ret = -1;
1864                         if (nl_route >= 0)
1865                                 ret = mlx5_nl_switch_info
1866                                                (nl_route,
1867                                                 list[ns].ifindex,
1868                                                 &list[ns].info);
1869                         if (ret || (!list[ns].info.representor &&
1870                                     !list[ns].info.master)) {
1871                                 /*
1872                                  * We failed to recognize representors with
1873                                  * Netlink, let's try to perform the task
1874                                  * with sysfs.
1875                                  */
1876                                 ret =  mlx5_sysfs_switch_info
1877                                                 (list[ns].ifindex,
1878                                                  &list[ns].info);
1879                         }
1880                         if (!ret && (list[ns].info.representor ^
1881                                      list[ns].info.master)) {
1882                                 ns++;
1883                         } else if ((nd == 1) &&
1884                                    !list[ns].info.representor &&
1885                                    !list[ns].info.master) {
1886                                 /*
1887                                  * Single IB device with
1888                                  * one physical port and
1889                                  * attached network device.
1890                                  * May be SRIOV is not enabled
1891                                  * or there is no representors.
1892                                  */
1893                                 DRV_LOG(INFO, "no E-Switch support detected");
1894                                 ns++;
1895                                 break;
1896                         }
1897                 }
1898                 if (!ns) {
1899                         DRV_LOG(ERR,
1900                                 "unable to recognize master/representors"
1901                                 " on the multiple IB devices");
1902                         rte_errno = ENOENT;
1903                         ret = -rte_errno;
1904                         goto exit;
1905                 }
1906         }
1907         assert(ns);
1908         /*
1909          * Sort list to probe devices in natural order for users convenience
1910          * (i.e. master first, then representors from lowest to highest ID).
1911          */
1912         qsort(list, ns, sizeof(*list), mlx5_dev_spawn_data_cmp);
1913         /* Default configuration. */
1914         dev_config = (struct mlx5_dev_config){
1915                 .hw_padding = 0,
1916                 .mps = MLX5_ARG_UNSET,
1917                 .tx_vec_en = 1,
1918                 .rx_vec_en = 1,
1919                 .txq_inline = MLX5_ARG_UNSET,
1920                 .txqs_inline = MLX5_ARG_UNSET,
1921                 .txqs_vec = MLX5_ARG_UNSET,
1922                 .inline_max_packet_sz = MLX5_ARG_UNSET,
1923                 .vf_nl_en = 1,
1924                 .mr_ext_memseg_en = 1,
1925                 .mprq = {
1926                         .enabled = 0, /* Disabled by default. */
1927                         .stride_num_n = MLX5_MPRQ_STRIDE_NUM_N,
1928                         .max_memcpy_len = MLX5_MPRQ_MEMCPY_DEFAULT_LEN,
1929                         .min_rxqs_num = MLX5_MPRQ_MIN_RXQS,
1930                 },
1931                 .dv_esw_en = 1,
1932         };
1933         /* Device specific configuration. */
1934         switch (pci_dev->id.device_id) {
1935         case PCI_DEVICE_ID_MELLANOX_CONNECTX5BF:
1936                 dev_config.txqs_vec = MLX5_VPMD_MAX_TXQS_BLUEFIELD;
1937                 break;
1938         case PCI_DEVICE_ID_MELLANOX_CONNECTX4VF:
1939         case PCI_DEVICE_ID_MELLANOX_CONNECTX4LXVF:
1940         case PCI_DEVICE_ID_MELLANOX_CONNECTX5VF:
1941         case PCI_DEVICE_ID_MELLANOX_CONNECTX5EXVF:
1942                 dev_config.vf = 1;
1943                 break;
1944         default:
1945                 break;
1946         }
1947         /* Set architecture-dependent default value if unset. */
1948         if (dev_config.txqs_vec == MLX5_ARG_UNSET)
1949                 dev_config.txqs_vec = MLX5_VPMD_MAX_TXQS;
1950         for (i = 0; i != ns; ++i) {
1951                 uint32_t restore;
1952
1953                 list[i].eth_dev = mlx5_dev_spawn(&pci_dev->device,
1954                                                  &list[i],
1955                                                  dev_config);
1956                 if (!list[i].eth_dev) {
1957                         if (rte_errno != EBUSY && rte_errno != EEXIST)
1958                                 break;
1959                         /* Device is disabled or already spawned. Ignore it. */
1960                         continue;
1961                 }
1962                 restore = list[i].eth_dev->data->dev_flags;
1963                 rte_eth_copy_pci_info(list[i].eth_dev, pci_dev);
1964                 /* Restore non-PCI flags cleared by the above call. */
1965                 list[i].eth_dev->data->dev_flags |= restore;
1966                 rte_eth_dev_probing_finish(list[i].eth_dev);
1967         }
1968         if (i != ns) {
1969                 DRV_LOG(ERR,
1970                         "probe of PCI device " PCI_PRI_FMT " aborted after"
1971                         " encountering an error: %s",
1972                         pci_dev->addr.domain, pci_dev->addr.bus,
1973                         pci_dev->addr.devid, pci_dev->addr.function,
1974                         strerror(rte_errno));
1975                 ret = -rte_errno;
1976                 /* Roll back. */
1977                 while (i--) {
1978                         if (!list[i].eth_dev)
1979                                 continue;
1980                         mlx5_dev_close(list[i].eth_dev);
1981                         /* mac_addrs must not be freed because in dev_private */
1982                         list[i].eth_dev->data->mac_addrs = NULL;
1983                         claim_zero(rte_eth_dev_release_port(list[i].eth_dev));
1984                 }
1985                 /* Restore original error. */
1986                 rte_errno = -ret;
1987         } else {
1988                 ret = 0;
1989         }
1990 exit:
1991         /*
1992          * Do the routine cleanup:
1993          * - close opened Netlink sockets
1994          * - free the Infiniband device list
1995          */
1996         if (nl_rdma >= 0)
1997                 close(nl_rdma);
1998         if (nl_route >= 0)
1999                 close(nl_route);
2000         assert(ibv_list);
2001         mlx5_glue->free_device_list(ibv_list);
2002         return ret;
2003 }
2004
2005 /**
2006  * DPDK callback to remove a PCI device.
2007  *
2008  * This function removes all Ethernet devices belong to a given PCI device.
2009  *
2010  * @param[in] pci_dev
2011  *   Pointer to the PCI device.
2012  *
2013  * @return
2014  *   0 on success, the function cannot fail.
2015  */
2016 static int
2017 mlx5_pci_remove(struct rte_pci_device *pci_dev)
2018 {
2019         uint16_t port_id;
2020
2021         RTE_ETH_FOREACH_DEV_OF(port_id, &pci_dev->device)
2022                 rte_eth_dev_close(port_id);
2023         return 0;
2024 }
2025
2026 static const struct rte_pci_id mlx5_pci_id_map[] = {
2027         {
2028                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
2029                                PCI_DEVICE_ID_MELLANOX_CONNECTX4)
2030         },
2031         {
2032                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
2033                                PCI_DEVICE_ID_MELLANOX_CONNECTX4VF)
2034         },
2035         {
2036                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
2037                                PCI_DEVICE_ID_MELLANOX_CONNECTX4LX)
2038         },
2039         {
2040                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
2041                                PCI_DEVICE_ID_MELLANOX_CONNECTX4LXVF)
2042         },
2043         {
2044                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
2045                                PCI_DEVICE_ID_MELLANOX_CONNECTX5)
2046         },
2047         {
2048                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
2049                                PCI_DEVICE_ID_MELLANOX_CONNECTX5VF)
2050         },
2051         {
2052                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
2053                                PCI_DEVICE_ID_MELLANOX_CONNECTX5EX)
2054         },
2055         {
2056                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
2057                                PCI_DEVICE_ID_MELLANOX_CONNECTX5EXVF)
2058         },
2059         {
2060                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
2061                                PCI_DEVICE_ID_MELLANOX_CONNECTX5BF)
2062         },
2063         {
2064                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
2065                                PCI_DEVICE_ID_MELLANOX_CONNECTX5BFVF)
2066         },
2067         {
2068                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
2069                                 PCI_DEVICE_ID_MELLANOX_CONNECTX6)
2070         },
2071         {
2072                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
2073                                 PCI_DEVICE_ID_MELLANOX_CONNECTX6VF)
2074         },
2075         {
2076                 .vendor_id = 0
2077         }
2078 };
2079
2080 static struct rte_pci_driver mlx5_driver = {
2081         .driver = {
2082                 .name = MLX5_DRIVER_NAME
2083         },
2084         .id_table = mlx5_pci_id_map,
2085         .probe = mlx5_pci_probe,
2086         .remove = mlx5_pci_remove,
2087         .dma_map = mlx5_dma_map,
2088         .dma_unmap = mlx5_dma_unmap,
2089         .drv_flags = RTE_PCI_DRV_INTR_LSC | RTE_PCI_DRV_INTR_RMV |
2090                      RTE_PCI_DRV_PROBE_AGAIN | RTE_PCI_DRV_IOVA_AS_VA,
2091 };
2092
2093 #ifdef RTE_IBVERBS_LINK_DLOPEN
2094
2095 /**
2096  * Suffix RTE_EAL_PMD_PATH with "-glue".
2097  *
2098  * This function performs a sanity check on RTE_EAL_PMD_PATH before
2099  * suffixing its last component.
2100  *
2101  * @param buf[out]
2102  *   Output buffer, should be large enough otherwise NULL is returned.
2103  * @param size
2104  *   Size of @p out.
2105  *
2106  * @return
2107  *   Pointer to @p buf or @p NULL in case suffix cannot be appended.
2108  */
2109 static char *
2110 mlx5_glue_path(char *buf, size_t size)
2111 {
2112         static const char *const bad[] = { "/", ".", "..", NULL };
2113         const char *path = RTE_EAL_PMD_PATH;
2114         size_t len = strlen(path);
2115         size_t off;
2116         int i;
2117
2118         while (len && path[len - 1] == '/')
2119                 --len;
2120         for (off = len; off && path[off - 1] != '/'; --off)
2121                 ;
2122         for (i = 0; bad[i]; ++i)
2123                 if (!strncmp(path + off, bad[i], (int)(len - off)))
2124                         goto error;
2125         i = snprintf(buf, size, "%.*s-glue", (int)len, path);
2126         if (i == -1 || (size_t)i >= size)
2127                 goto error;
2128         return buf;
2129 error:
2130         DRV_LOG(ERR,
2131                 "unable to append \"-glue\" to last component of"
2132                 " RTE_EAL_PMD_PATH (\"" RTE_EAL_PMD_PATH "\"),"
2133                 " please re-configure DPDK");
2134         return NULL;
2135 }
2136
2137 /**
2138  * Initialization routine for run-time dependency on rdma-core.
2139  */
2140 static int
2141 mlx5_glue_init(void)
2142 {
2143         char glue_path[sizeof(RTE_EAL_PMD_PATH) - 1 + sizeof("-glue")];
2144         const char *path[] = {
2145                 /*
2146                  * A basic security check is necessary before trusting
2147                  * MLX5_GLUE_PATH, which may override RTE_EAL_PMD_PATH.
2148                  */
2149                 (geteuid() == getuid() && getegid() == getgid() ?
2150                  getenv("MLX5_GLUE_PATH") : NULL),
2151                 /*
2152                  * When RTE_EAL_PMD_PATH is set, use its glue-suffixed
2153                  * variant, otherwise let dlopen() look up libraries on its
2154                  * own.
2155                  */
2156                 (*RTE_EAL_PMD_PATH ?
2157                  mlx5_glue_path(glue_path, sizeof(glue_path)) : ""),
2158         };
2159         unsigned int i = 0;
2160         void *handle = NULL;
2161         void **sym;
2162         const char *dlmsg;
2163
2164         while (!handle && i != RTE_DIM(path)) {
2165                 const char *end;
2166                 size_t len;
2167                 int ret;
2168
2169                 if (!path[i]) {
2170                         ++i;
2171                         continue;
2172                 }
2173                 end = strpbrk(path[i], ":;");
2174                 if (!end)
2175                         end = path[i] + strlen(path[i]);
2176                 len = end - path[i];
2177                 ret = 0;
2178                 do {
2179                         char name[ret + 1];
2180
2181                         ret = snprintf(name, sizeof(name), "%.*s%s" MLX5_GLUE,
2182                                        (int)len, path[i],
2183                                        (!len || *(end - 1) == '/') ? "" : "/");
2184                         if (ret == -1)
2185                                 break;
2186                         if (sizeof(name) != (size_t)ret + 1)
2187                                 continue;
2188                         DRV_LOG(DEBUG, "looking for rdma-core glue as \"%s\"",
2189                                 name);
2190                         handle = dlopen(name, RTLD_LAZY);
2191                         break;
2192                 } while (1);
2193                 path[i] = end + 1;
2194                 if (!*end)
2195                         ++i;
2196         }
2197         if (!handle) {
2198                 rte_errno = EINVAL;
2199                 dlmsg = dlerror();
2200                 if (dlmsg)
2201                         DRV_LOG(WARNING, "cannot load glue library: %s", dlmsg);
2202                 goto glue_error;
2203         }
2204         sym = dlsym(handle, "mlx5_glue");
2205         if (!sym || !*sym) {
2206                 rte_errno = EINVAL;
2207                 dlmsg = dlerror();
2208                 if (dlmsg)
2209                         DRV_LOG(ERR, "cannot resolve glue symbol: %s", dlmsg);
2210                 goto glue_error;
2211         }
2212         mlx5_glue = *sym;
2213         return 0;
2214 glue_error:
2215         if (handle)
2216                 dlclose(handle);
2217         DRV_LOG(WARNING,
2218                 "cannot initialize PMD due to missing run-time dependency on"
2219                 " rdma-core libraries (libibverbs, libmlx5)");
2220         return -rte_errno;
2221 }
2222
2223 #endif
2224
2225 /**
2226  * Driver initialization routine.
2227  */
2228 RTE_INIT(rte_mlx5_pmd_init)
2229 {
2230         /* Initialize driver log type. */
2231         mlx5_logtype = rte_log_register("pmd.net.mlx5");
2232         if (mlx5_logtype >= 0)
2233                 rte_log_set_level(mlx5_logtype, RTE_LOG_NOTICE);
2234
2235         /* Build the static tables for Verbs conversion. */
2236         mlx5_set_ptype_table();
2237         mlx5_set_cksum_table();
2238         mlx5_set_swp_types_table();
2239         /*
2240          * RDMAV_HUGEPAGES_SAFE tells ibv_fork_init() we intend to use
2241          * huge pages. Calling ibv_fork_init() during init allows
2242          * applications to use fork() safely for purposes other than
2243          * using this PMD, which is not supported in forked processes.
2244          */
2245         setenv("RDMAV_HUGEPAGES_SAFE", "1", 1);
2246         /* Match the size of Rx completion entry to the size of a cacheline. */
2247         if (RTE_CACHE_LINE_SIZE == 128)
2248                 setenv("MLX5_CQE_SIZE", "128", 0);
2249         /*
2250          * MLX5_DEVICE_FATAL_CLEANUP tells ibv_destroy functions to
2251          * cleanup all the Verbs resources even when the device was removed.
2252          */
2253         setenv("MLX5_DEVICE_FATAL_CLEANUP", "1", 1);
2254 #ifdef RTE_IBVERBS_LINK_DLOPEN
2255         if (mlx5_glue_init())
2256                 return;
2257         assert(mlx5_glue);
2258 #endif
2259 #ifndef NDEBUG
2260         /* Glue structure must not contain any NULL pointers. */
2261         {
2262                 unsigned int i;
2263
2264                 for (i = 0; i != sizeof(*mlx5_glue) / sizeof(void *); ++i)
2265                         assert(((const void *const *)mlx5_glue)[i]);
2266         }
2267 #endif
2268         if (strcmp(mlx5_glue->version, MLX5_GLUE_VERSION)) {
2269                 DRV_LOG(ERR,
2270                         "rdma-core glue \"%s\" mismatch: \"%s\" is required",
2271                         mlx5_glue->version, MLX5_GLUE_VERSION);
2272                 return;
2273         }
2274         mlx5_glue->fork_init();
2275         rte_pci_register(&mlx5_driver);
2276 }
2277
2278 RTE_PMD_EXPORT_NAME(net_mlx5, __COUNTER__);
2279 RTE_PMD_REGISTER_PCI_TABLE(net_mlx5, mlx5_pci_id_map);
2280 RTE_PMD_REGISTER_KMOD_DEP(net_mlx5, "* ib_uverbs & mlx5_core & mlx5_ib");