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 #include <rte_alarm.h>
  41
  42 #include "mlx5.h"
  43 #include "mlx5_utils.h"
  44 #include "mlx5_rxtx.h"
  45 #include "mlx5_autoconf.h"
  46 #include "mlx5_defs.h"
  47 #include "mlx5_glue.h"
  48 #include "mlx5_mr.h"
  49 #include "mlx5_flow.h"
  50
  51 /* Device parameter to enable RX completion queue compression. */
  52 #define MLX5_RXQ_CQE_COMP_EN "rxq_cqe_comp_en"
  53
  54 /* Device parameter to enable RX completion entry padding to 128B. */
  55 #define MLX5_RXQ_CQE_PAD_EN "rxq_cqe_pad_en"
  56
  57 /* Device parameter to enable padding Rx packet to cacheline size. */
  58 #define MLX5_RXQ_PKT_PAD_EN "rxq_pkt_pad_en"
  59
  60 /* Device parameter to enable Multi-Packet Rx queue. */
  61 #define MLX5_RX_MPRQ_EN "mprq_en"
  62
  63 /* Device parameter to configure log 2 of the number of strides for MPRQ. */
  64 #define MLX5_RX_MPRQ_LOG_STRIDE_NUM "mprq_log_stride_num"
  65
  66 /* Device parameter to limit the size of memcpy'd packet for MPRQ. */
  67 #define MLX5_RX_MPRQ_MAX_MEMCPY_LEN "mprq_max_memcpy_len"
  68
  69 /* Device parameter to set the minimum number of Rx queues to enable MPRQ. */
  70 #define MLX5_RXQS_MIN_MPRQ "rxqs_min_mprq"
  71
  72 /* Device parameter to configure inline send. Deprecated, ignored.*/
  73 #define MLX5_TXQ_INLINE "txq_inline"
  74
  75 /* Device parameter to limit packet size to inline with ordinary SEND. */
  76 #define MLX5_TXQ_INLINE_MAX "txq_inline_max"
  77
  78 /* Device parameter to configure minimal data size to inline. */
  79 #define MLX5_TXQ_INLINE_MIN "txq_inline_min"
  80
  81 /* Device parameter to limit packet size to inline with Enhanced MPW. */
  82 #define MLX5_TXQ_INLINE_MPW "txq_inline_mpw"
  83
  84 /*
  85  * Device parameter to configure the number of TX queues threshold for
  86  * enabling inline send.
  87  */
  88 #define MLX5_TXQS_MIN_INLINE "txqs_min_inline"
  89
  90 /*
  91  * Device parameter to configure the number of TX queues threshold for
  92  * enabling vectorized Tx, deprecated, ignored (no vectorized Tx routines).
  93  */
  94 #define MLX5_TXQS_MAX_VEC "txqs_max_vec"
  95
  96 /* Device parameter to enable multi-packet send WQEs. */
  97 #define MLX5_TXQ_MPW_EN "txq_mpw_en"
  98
  99 /*
 100  * Device parameter to include 2 dsegs in the title WQEBB.
 101  * Deprecated, ignored.
 102  */
 103 #define MLX5_TXQ_MPW_HDR_DSEG_EN "txq_mpw_hdr_dseg_en"
 104
 105 /*
 106  * Device parameter to limit the size of inlining packet.
 107  * Deprecated, ignored.
 108  */
 109 #define MLX5_TXQ_MAX_INLINE_LEN "txq_max_inline_len"
 110
 111 /*
 112  * Device parameter to enable hardware Tx vector.
 113  * Deprecated, ignored (no vectorized Tx routines anymore).
 114  */
 115 #define MLX5_TX_VEC_EN "tx_vec_en"
 116
 117 /* Device parameter to enable hardware Rx vector. */
 118 #define MLX5_RX_VEC_EN "rx_vec_en"
 119
 120 /* Allow L3 VXLAN flow creation. */
 121 #define MLX5_L3_VXLAN_EN "l3_vxlan_en"
 122
 123 /* Activate DV E-Switch flow steering. */
 124 #define MLX5_DV_ESW_EN "dv_esw_en"
 125
 126 /* Activate DV flow steering. */
 127 #define MLX5_DV_FLOW_EN "dv_flow_en"
 128
 129 /* Activate Netlink support in VF mode. */
 130 #define MLX5_VF_NL_EN "vf_nl_en"
 131
 132 /* Enable extending memsegs when creating a MR. */
 133 #define MLX5_MR_EXT_MEMSEG_EN "mr_ext_memseg_en"
 134
 135 /* Select port representors to instantiate. */
 136 #define MLX5_REPRESENTOR "representor"
 137
 138 /* Device parameter to configure the maximum number of dump files per queue. */
 139 #define MLX5_MAX_DUMP_FILES_NUM "max_dump_files_num"
 140
 141 #ifndef HAVE_IBV_MLX5_MOD_MPW
 142 #define MLX5DV_CONTEXT_FLAGS_MPW_ALLOWED (1 << 2)
 143 #define MLX5DV_CONTEXT_FLAGS_ENHANCED_MPW (1 << 3)
 144 #endif
 145
 146 #ifndef HAVE_IBV_MLX5_MOD_CQE_128B_COMP
 147 #define MLX5DV_CONTEXT_FLAGS_CQE_128B_COMP (1 << 4)
 148 #endif
 149
 150 static const char *MZ_MLX5_PMD_SHARED_DATA = "mlx5_pmd_shared_data";
 151
 152 /* Shared memory between primary and secondary processes. */
 153 struct mlx5_shared_data *mlx5_shared_data;
 154
 155 /* Spinlock for mlx5_shared_data allocation. */
 156 static rte_spinlock_t mlx5_shared_data_lock = RTE_SPINLOCK_INITIALIZER;
 157
 158 /* Process local data for secondary processes. */
 159 static struct mlx5_local_data mlx5_local_data;
 160
 161 /** Driver-specific log messages type. */
 162 int mlx5_logtype;
 163
 164 /** Data associated with devices to spawn. */
 165 struct mlx5_dev_spawn_data {
 166         uint32_t ifindex; /**< Network interface index. */
 167         uint32_t max_port; /**< IB device maximal port index. */
 168         uint32_t ibv_port; /**< IB device physical port index. */
 169         struct mlx5_switch_info info; /**< Switch information. */
 170         struct ibv_device *ibv_dev; /**< Associated IB device. */
 171         struct rte_eth_dev *eth_dev; /**< Associated Ethernet device. */
 172         struct rte_pci_device *pci_dev; /**< Backend PCI device. */
 173 };
 174
 175 static LIST_HEAD(, mlx5_ibv_shared) mlx5_ibv_list = LIST_HEAD_INITIALIZER();
 176 static pthread_mutex_t mlx5_ibv_list_mutex = PTHREAD_MUTEX_INITIALIZER;
 177
 178 /**
 179  * Initialize the counters management structure.
 180  *
 181  * @param[in] sh
 182  *   Pointer to mlx5_ibv_shared object to free
 183  */
 184 static void
 185 mlx5_flow_counters_mng_init(struct mlx5_ibv_shared *sh)
 186 {
 187         uint8_t i;
 188
 189         TAILQ_INIT(&sh->cmng.flow_counters);
 190         for (i = 0; i < RTE_DIM(sh->cmng.ccont); ++i)
 191                 TAILQ_INIT(&sh->cmng.ccont[i].pool_list);
 192 }
 193
 194 /**
 195  * Destroy all the resources allocated for a counter memory management.
 196  *
 197  * @param[in] mng
 198  *   Pointer to the memory management structure.
 199  */
 200 static void
 201 mlx5_flow_destroy_counter_stat_mem_mng(struct mlx5_counter_stats_mem_mng *mng)
 202 {
 203         uint8_t *mem = (uint8_t *)(uintptr_t)mng->raws[0].data;
 204
 205         LIST_REMOVE(mng, next);
 206         claim_zero(mlx5_devx_cmd_destroy(mng->dm));
 207         claim_zero(mlx5_glue->devx_umem_dereg(mng->umem));
 208         rte_free(mem);
 209 }
 210
 211 /**
 212  * Close and release all the resources of the counters management.
 213  *
 214  * @param[in] sh
 215  *   Pointer to mlx5_ibv_shared object to free.
 216  */
 217 static void
 218 mlx5_flow_counters_mng_close(struct mlx5_ibv_shared *sh)
 219 {
 220         struct mlx5_counter_stats_mem_mng *mng;
 221         uint8_t i;
 222         int j;
 223         int retries = 1024;
 224
 225         rte_errno = 0;
 226         while (--retries) {
 227                 rte_eal_alarm_cancel(mlx5_flow_query_alarm, sh);
 228                 if (rte_errno != EINPROGRESS)
 229                         break;
 230                 rte_pause();
 231         }
 232         for (i = 0; i < RTE_DIM(sh->cmng.ccont); ++i) {
 233                 struct mlx5_flow_counter_pool *pool;
 234                 uint32_t batch = !!(i % 2);
 235
 236                 if (!sh->cmng.ccont[i].pools)
 237                         continue;
 238                 pool = TAILQ_FIRST(&sh->cmng.ccont[i].pool_list);
 239                 while (pool) {
 240                         if (batch) {
 241                                 if (pool->min_dcs)
 242                                         claim_zero
 243                                         (mlx5_devx_cmd_destroy(pool->min_dcs));
 244                         }
 245                         for (j = 0; j < MLX5_COUNTERS_PER_POOL; ++j) {
 246                                 if (pool->counters_raw[j].action)
 247                                         claim_zero
 248                                         (mlx5_glue->destroy_flow_action
 249                                                (pool->counters_raw[j].action));
 250                                 if (!batch && pool->counters_raw[j].dcs)
 251                                         claim_zero(mlx5_devx_cmd_destroy
 252                                                   (pool->counters_raw[j].dcs));
 253                         }
 254                         TAILQ_REMOVE(&sh->cmng.ccont[i].pool_list, pool,
 255                                      next);
 256                         rte_free(pool);
 257                         pool = TAILQ_FIRST(&sh->cmng.ccont[i].pool_list);
 258                 }
 259                 rte_free(sh->cmng.ccont[i].pools);
 260         }
 261         mng = LIST_FIRST(&sh->cmng.mem_mngs);
 262         while (mng) {
 263                 mlx5_flow_destroy_counter_stat_mem_mng(mng);
 264                 mng = LIST_FIRST(&sh->cmng.mem_mngs);
 265         }
 266         memset(&sh->cmng, 0, sizeof(sh->cmng));
 267 }
 268
 269 /**
 270  * Allocate shared IB device context. If there is multiport device the
 271  * master and representors will share this context, if there is single
 272  * port dedicated IB device, the context will be used by only given
 273  * port due to unification.
 274  *
 275  * Routine first searches the context for the specified IB device name,
 276  * if found the shared context assumed and reference counter is incremented.
 277  * If no context found the new one is created and initialized with specified
 278  * IB device context and parameters.
 279  *
 280  * @param[in] spawn
 281  *   Pointer to the IB device attributes (name, port, etc).
 282  *
 283  * @return
 284  *   Pointer to mlx5_ibv_shared object on success,
 285  *   otherwise NULL and rte_errno is set.
 286  */
 287 static struct mlx5_ibv_shared *
 288 mlx5_alloc_shared_ibctx(const struct mlx5_dev_spawn_data *spawn)
 289 {
 290         struct mlx5_ibv_shared *sh;
 291         int err = 0;
 292         uint32_t i;
 293
 294         assert(spawn);
 295         /* Secondary process should not create the shared context. */
 296         assert(rte_eal_process_type() == RTE_PROC_PRIMARY);
 297         pthread_mutex_lock(&mlx5_ibv_list_mutex);
 298         /* Search for IB context by device name. */
 299         LIST_FOREACH(sh, &mlx5_ibv_list, next) {
 300                 if (!strcmp(sh->ibdev_name, spawn->ibv_dev->name)) {
 301                         sh->refcnt++;
 302                         goto exit;
 303                 }
 304         }
 305         /* No device found, we have to create new shared context. */
 306         assert(spawn->max_port);
 307         sh = rte_zmalloc("ethdev shared ib context",
 308                          sizeof(struct mlx5_ibv_shared) +
 309                          spawn->max_port *
 310                          sizeof(struct mlx5_ibv_shared_port),
 311                          RTE_CACHE_LINE_SIZE);
 312         if (!sh) {
 313                 DRV_LOG(ERR, "shared context allocation failure");
 314                 rte_errno  = ENOMEM;
 315                 goto exit;
 316         }
 317         /* Try to open IB device with DV first, then usual Verbs. */
 318         errno = 0;
 319         sh->ctx = mlx5_glue->dv_open_device(spawn->ibv_dev);
 320         if (sh->ctx) {
 321                 sh->devx = 1;
 322                 DRV_LOG(DEBUG, "DevX is supported");
 323         } else {
 324                 sh->ctx = mlx5_glue->open_device(spawn->ibv_dev);
 325                 if (!sh->ctx) {
 326                         err = errno ? errno : ENODEV;
 327                         goto error;
 328                 }
 329                 DRV_LOG(DEBUG, "DevX is NOT supported");
 330         }
 331         err = mlx5_glue->query_device_ex(sh->ctx, NULL, &sh->device_attr);
 332         if (err) {
 333                 DRV_LOG(DEBUG, "ibv_query_device_ex() failed");
 334                 goto error;
 335         }
 336         sh->refcnt = 1;
 337         sh->max_port = spawn->max_port;
 338         strncpy(sh->ibdev_name, sh->ctx->device->name,
 339                 sizeof(sh->ibdev_name));
 340         strncpy(sh->ibdev_path, sh->ctx->device->ibdev_path,
 341                 sizeof(sh->ibdev_path));
 342         sh->pci_dev = spawn->pci_dev;
 343         pthread_mutex_init(&sh->intr_mutex, NULL);
 344         /*
 345          * Setting port_id to max unallowed value means
 346          * there is no interrupt subhandler installed for
 347          * the given port index i.
 348          */
 349         for (i = 0; i < sh->max_port; i++)
 350                 sh->port[i].ih_port_id = RTE_MAX_ETHPORTS;
 351         sh->pd = mlx5_glue->alloc_pd(sh->ctx);
 352         if (sh->pd == NULL) {
 353                 DRV_LOG(ERR, "PD allocation failure");
 354                 err = ENOMEM;
 355                 goto error;
 356         }
 357         /*
 358          * Once the device is added to the list of memory event
 359          * callback, its global MR cache table cannot be expanded
 360          * on the fly because of deadlock. If it overflows, lookup
 361          * should be done by searching MR list linearly, which is slow.
 362          *
 363          * At this point the device is not added to the memory
 364          * event list yet, context is just being created.
 365          */
 366         err = mlx5_mr_btree_init(&sh->mr.cache,
 367                                  MLX5_MR_BTREE_CACHE_N * 2,
 368                                  sh->pci_dev->device.numa_node);
 369         if (err) {
 370                 err = rte_errno;
 371                 goto error;
 372         }
 373         mlx5_flow_counters_mng_init(sh);
 374         LIST_INSERT_HEAD(&mlx5_ibv_list, sh, next);
 375 exit:
 376         pthread_mutex_unlock(&mlx5_ibv_list_mutex);
 377         return sh;
 378 error:
 379         pthread_mutex_unlock(&mlx5_ibv_list_mutex);
 380         assert(sh);
 381         if (sh->pd)
 382                 claim_zero(mlx5_glue->dealloc_pd(sh->pd));
 383         if (sh->ctx)
 384                 claim_zero(mlx5_glue->close_device(sh->ctx));
 385         rte_free(sh);
 386         assert(err > 0);
 387         rte_errno = err;
 388         return NULL;
 389 }
 390
 391 /**
 392  * Free shared IB device context. Decrement counter and if zero free
 393  * all allocated resources and close handles.
 394  *
 395  * @param[in] sh
 396  *   Pointer to mlx5_ibv_shared object to free
 397  */
 398 static void
 399 mlx5_free_shared_ibctx(struct mlx5_ibv_shared *sh)
 400 {
 401         pthread_mutex_lock(&mlx5_ibv_list_mutex);
 402 #ifndef NDEBUG
 403         /* Check the object presence in the list. */
 404         struct mlx5_ibv_shared *lctx;
 405
 406         LIST_FOREACH(lctx, &mlx5_ibv_list, next)
 407                 if (lctx == sh)
 408                         break;
 409         assert(lctx);
 410         if (lctx != sh) {
 411                 DRV_LOG(ERR, "Freeing non-existing shared IB context");
 412                 goto exit;
 413         }
 414 #endif
 415         assert(sh);
 416         assert(sh->refcnt);
 417         /* Secondary process should not free the shared context. */
 418         assert(rte_eal_process_type() == RTE_PROC_PRIMARY);
 419         if (--sh->refcnt)
 420                 goto exit;
 421         /* Release created Memory Regions. */
 422         mlx5_mr_release(sh);
 423         LIST_REMOVE(sh, next);
 424         /*
 425          *  Ensure there is no async event handler installed.
 426          *  Only primary process handles async device events.
 427          **/
 428         mlx5_flow_counters_mng_close(sh);
 429         assert(!sh->intr_cnt);
 430         if (sh->intr_cnt)
 431                 mlx5_intr_callback_unregister
 432                         (&sh->intr_handle, mlx5_dev_interrupt_handler, sh);
 433         pthread_mutex_destroy(&sh->intr_mutex);
 434         if (sh->pd)
 435                 claim_zero(mlx5_glue->dealloc_pd(sh->pd));
 436         if (sh->ctx)
 437                 claim_zero(mlx5_glue->close_device(sh->ctx));
 438         rte_free(sh);
 439 exit:
 440         pthread_mutex_unlock(&mlx5_ibv_list_mutex);
 441 }
 442
 443 /**
 444  * Initialize DR related data within private structure.
 445  * Routine checks the reference counter and does actual
 446  * resources creation/initialization only if counter is zero.
 447  *
 448  * @param[in] priv
 449  *   Pointer to the private device data structure.
 450  *
 451  * @return
 452  *   Zero on success, positive error code otherwise.
 453  */
 454 static int
 455 mlx5_alloc_shared_dr(struct mlx5_priv *priv)
 456 {
 457 #ifdef HAVE_MLX5DV_DR
 458         struct mlx5_ibv_shared *sh = priv->sh;
 459         int err = 0;
 460         void *domain;
 461
 462         assert(sh);
 463         if (sh->dv_refcnt) {
 464                 /* Shared DV/DR structures is already initialized. */
 465                 sh->dv_refcnt++;
 466                 priv->dr_shared = 1;
 467                 return 0;
 468         }
 469         /* Reference counter is zero, we should initialize structures. */
 470         domain = mlx5_glue->dr_create_domain(sh->ctx,
 471                                              MLX5DV_DR_DOMAIN_TYPE_NIC_RX);
 472         if (!domain) {
 473                 DRV_LOG(ERR, "ingress mlx5dv_dr_create_domain failed");
 474                 err = errno;
 475                 goto error;
 476         }
 477         sh->rx_domain = domain;
 478         domain = mlx5_glue->dr_create_domain(sh->ctx,
 479                                              MLX5DV_DR_DOMAIN_TYPE_NIC_TX);
 480         if (!domain) {
 481                 DRV_LOG(ERR, "egress mlx5dv_dr_create_domain failed");
 482                 err = errno;
 483                 goto error;
 484         }
 485         pthread_mutex_init(&sh->dv_mutex, NULL);
 486         sh->tx_domain = domain;
 487 #ifdef HAVE_MLX5DV_DR_ESWITCH
 488         if (priv->config.dv_esw_en) {
 489                 domain  = mlx5_glue->dr_create_domain
 490                         (sh->ctx, MLX5DV_DR_DOMAIN_TYPE_FDB);
 491                 if (!domain) {
 492                         DRV_LOG(ERR, "FDB mlx5dv_dr_create_domain failed");
 493                         err = errno;
 494                         goto error;
 495                 }
 496                 sh->fdb_domain = domain;
 497                 sh->esw_drop_action = mlx5_glue->dr_create_flow_action_drop();
 498         }
 499 #endif
 500         sh->dv_refcnt++;
 501         priv->dr_shared = 1;
 502         return 0;
 503
 504 error:
 505        /* Rollback the created objects. */
 506         if (sh->rx_domain) {
 507                 mlx5_glue->dr_destroy_domain(sh->rx_domain);
 508                 sh->rx_domain = NULL;
 509         }
 510         if (sh->tx_domain) {
 511                 mlx5_glue->dr_destroy_domain(sh->tx_domain);
 512                 sh->tx_domain = NULL;
 513         }
 514         if (sh->fdb_domain) {
 515                 mlx5_glue->dr_destroy_domain(sh->fdb_domain);
 516                 sh->fdb_domain = NULL;
 517         }
 518         if (sh->esw_drop_action) {
 519                 mlx5_glue->destroy_flow_action(sh->esw_drop_action);
 520                 sh->esw_drop_action = NULL;
 521         }
 522         return err;
 523 #else
 524         (void)priv;
 525         return 0;
 526 #endif
 527 }
 528
 529 /**
 530  * Destroy DR related data within private structure.
 531  *
 532  * @param[in] priv
 533  *   Pointer to the private device data structure.
 534  */
 535 static void
 536 mlx5_free_shared_dr(struct mlx5_priv *priv)
 537 {
 538 #ifdef HAVE_MLX5DV_DR
 539         struct mlx5_ibv_shared *sh;
 540
 541         if (!priv->dr_shared)
 542                 return;
 543         priv->dr_shared = 0;
 544         sh = priv->sh;
 545         assert(sh);
 546         assert(sh->dv_refcnt);
 547         if (sh->dv_refcnt && --sh->dv_refcnt)
 548                 return;
 549         if (sh->rx_domain) {
 550                 mlx5_glue->dr_destroy_domain(sh->rx_domain);
 551                 sh->rx_domain = NULL;
 552         }
 553         if (sh->tx_domain) {
 554                 mlx5_glue->dr_destroy_domain(sh->tx_domain);
 555                 sh->tx_domain = NULL;
 556         }
 557 #ifdef HAVE_MLX5DV_DR_ESWITCH
 558         if (sh->fdb_domain) {
 559                 mlx5_glue->dr_destroy_domain(sh->fdb_domain);
 560                 sh->fdb_domain = NULL;
 561         }
 562         if (sh->esw_drop_action) {
 563                 mlx5_glue->destroy_flow_action(sh->esw_drop_action);
 564                 sh->esw_drop_action = NULL;
 565         }
 566 #endif
 567         pthread_mutex_destroy(&sh->dv_mutex);
 568 #else
 569         (void)priv;
 570 #endif
 571 }
 572
 573 /**
 574  * Initialize shared data between primary and secondary process.
 575  *
 576  * A memzone is reserved by primary process and secondary processes attach to
 577  * the memzone.
 578  *
 579  * @return
 580  *   0 on success, a negative errno value otherwise and rte_errno is set.
 581  */
 582 static int
 583 mlx5_init_shared_data(void)
 584 {
 585         const struct rte_memzone *mz;
 586         int ret = 0;
 587
 588         rte_spinlock_lock(&mlx5_shared_data_lock);
 589         if (mlx5_shared_data == NULL) {
 590                 if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
 591                         /* Allocate shared memory. */
 592                         mz = rte_memzone_reserve(MZ_MLX5_PMD_SHARED_DATA,
 593                                                  sizeof(*mlx5_shared_data),
 594                                                  SOCKET_ID_ANY, 0);
 595                         if (mz == NULL) {
 596                                 DRV_LOG(ERR,
 597                                         "Cannot allocate mlx5 shared data\n");
 598                                 ret = -rte_errno;
 599                                 goto error;
 600                         }
 601                         mlx5_shared_data = mz->addr;
 602                         memset(mlx5_shared_data, 0, sizeof(*mlx5_shared_data));
 603                         rte_spinlock_init(&mlx5_shared_data->lock);
 604                 } else {
 605                         /* Lookup allocated shared memory. */
 606                         mz = rte_memzone_lookup(MZ_MLX5_PMD_SHARED_DATA);
 607                         if (mz == NULL) {
 608                                 DRV_LOG(ERR,
 609                                         "Cannot attach mlx5 shared data\n");
 610                                 ret = -rte_errno;
 611                                 goto error;
 612                         }
 613                         mlx5_shared_data = mz->addr;
 614                         memset(&mlx5_local_data, 0, sizeof(mlx5_local_data));
 615                 }
 616         }
 617 error:
 618         rte_spinlock_unlock(&mlx5_shared_data_lock);
 619         return ret;
 620 }
 621
 622 /**
 623  * Retrieve integer value from environment variable.
 624  *
 625  * @param[in] name
 626  *   Environment variable name.
 627  *
 628  * @return
 629  *   Integer value, 0 if the variable is not set.
 630  */
 631 int
 632 mlx5_getenv_int(const char *name)
 633 {
 634         const char *val = getenv(name);
 635
 636         if (val == NULL)
 637                 return 0;
 638         return atoi(val);
 639 }
 640
 641 /**
 642  * Verbs callback to allocate a memory. This function should allocate the space
 643  * according to the size provided residing inside a huge page.
 644  * Please note that all allocation must respect the alignment from libmlx5
 645  * (i.e. currently sysconf(_SC_PAGESIZE)).
 646  *
 647  * @param[in] size
 648  *   The size in bytes of the memory to allocate.
 649  * @param[in] data
 650  *   A pointer to the callback data.
 651  *
 652  * @return
 653  *   Allocated buffer, NULL otherwise and rte_errno is set.
 654  */
 655 static void *
 656 mlx5_alloc_verbs_buf(size_t size, void *data)
 657 {
 658         struct mlx5_priv *priv = data;
 659         void *ret;
 660         size_t alignment = sysconf(_SC_PAGESIZE);
 661         unsigned int socket = SOCKET_ID_ANY;
 662
 663         if (priv->verbs_alloc_ctx.type == MLX5_VERBS_ALLOC_TYPE_TX_QUEUE) {
 664                 const struct mlx5_txq_ctrl *ctrl = priv->verbs_alloc_ctx.obj;
 665
 666                 socket = ctrl->socket;
 667         } else if (priv->verbs_alloc_ctx.type ==
 668                    MLX5_VERBS_ALLOC_TYPE_RX_QUEUE) {
 669                 const struct mlx5_rxq_ctrl *ctrl = priv->verbs_alloc_ctx.obj;
 670
 671                 socket = ctrl->socket;
 672         }
 673         assert(data != NULL);
 674         ret = rte_malloc_socket(__func__, size, alignment, socket);
 675         if (!ret && size)
 676                 rte_errno = ENOMEM;
 677         return ret;
 678 }
 679
 680 /**
 681  * Verbs callback to free a memory.
 682  *
 683  * @param[in] ptr
 684  *   A pointer to the memory to free.
 685  * @param[in] data
 686  *   A pointer to the callback data.
 687  */
 688 static void
 689 mlx5_free_verbs_buf(void *ptr, void *data __rte_unused)
 690 {
 691         assert(data != NULL);
 692         rte_free(ptr);
 693 }
 694
 695 /**
 696  * Initialize process private data structure.
 697  *
 698  * @param dev
 699  *   Pointer to Ethernet device structure.
 700  *
 701  * @return
 702  *   0 on success, a negative errno value otherwise and rte_errno is set.
 703  */
 704 int
 705 mlx5_proc_priv_init(struct rte_eth_dev *dev)
 706 {
 707         struct mlx5_priv *priv = dev->data->dev_private;
 708         struct mlx5_proc_priv *ppriv;
 709         size_t ppriv_size;
 710
 711         /*
 712          * UAR register table follows the process private structure. BlueFlame
 713          * registers for Tx queues are stored in the table.
 714          */
 715         ppriv_size =
 716                 sizeof(struct mlx5_proc_priv) + priv->txqs_n * sizeof(void *);
 717         ppriv = rte_malloc_socket("mlx5_proc_priv", ppriv_size,
 718                                   RTE_CACHE_LINE_SIZE, dev->device->numa_node);
 719         if (!ppriv) {
 720                 rte_errno = ENOMEM;
 721                 return -rte_errno;
 722         }
 723         ppriv->uar_table_sz = ppriv_size;
 724         dev->process_private = ppriv;
 725         return 0;
 726 }
 727
 728 /**
 729  * Un-initialize process private data structure.
 730  *
 731  * @param dev
 732  *   Pointer to Ethernet device structure.
 733  */
 734 static void
 735 mlx5_proc_priv_uninit(struct rte_eth_dev *dev)
 736 {
 737         if (!dev->process_private)
 738                 return;
 739         rte_free(dev->process_private);
 740         dev->process_private = NULL;
 741 }
 742
 743 /**
 744  * DPDK callback to close the device.
 745  *
 746  * Destroy all queues and objects, free memory.
 747  *
 748  * @param dev
 749  *   Pointer to Ethernet device structure.
 750  */
 751 static void
 752 mlx5_dev_close(struct rte_eth_dev *dev)
 753 {
 754         struct mlx5_priv *priv = dev->data->dev_private;
 755         unsigned int i;
 756         int ret;
 757
 758         DRV_LOG(DEBUG, "port %u closing device \"%s\"",
 759                 dev->data->port_id,
 760                 ((priv->sh->ctx != NULL) ? priv->sh->ctx->device->name : ""));
 761         /* In case mlx5_dev_stop() has not been called. */
 762         mlx5_dev_interrupt_handler_uninstall(dev);
 763         mlx5_traffic_disable(dev);
 764         mlx5_flow_flush(dev, NULL);
 765         /* Prevent crashes when queues are still in use. */
 766         dev->rx_pkt_burst = removed_rx_burst;
 767         dev->tx_pkt_burst = removed_tx_burst;
 768         rte_wmb();
 769         /* Disable datapath on secondary process. */
 770         mlx5_mp_req_stop_rxtx(dev);
 771         if (priv->rxqs != NULL) {
 772                 /* XXX race condition if mlx5_rx_burst() is still running. */
 773                 usleep(1000);
 774                 for (i = 0; (i != priv->rxqs_n); ++i)
 775                         mlx5_rxq_release(dev, i);
 776                 priv->rxqs_n = 0;
 777                 priv->rxqs = NULL;
 778         }
 779         if (priv->txqs != NULL) {
 780                 /* XXX race condition if mlx5_tx_burst() is still running. */
 781                 usleep(1000);
 782                 for (i = 0; (i != priv->txqs_n); ++i)
 783                         mlx5_txq_release(dev, i);
 784                 priv->txqs_n = 0;
 785                 priv->txqs = NULL;
 786         }
 787         mlx5_proc_priv_uninit(dev);
 788         mlx5_mprq_free_mp(dev);
 789         /* Remove from memory callback device list. */
 790         rte_rwlock_write_lock(&mlx5_shared_data->mem_event_rwlock);
 791         assert(priv->sh);
 792         LIST_REMOVE(priv->sh, mem_event_cb);
 793         rte_rwlock_write_unlock(&mlx5_shared_data->mem_event_rwlock);
 794         mlx5_free_shared_dr(priv);
 795         if (priv->rss_conf.rss_key != NULL)
 796                 rte_free(priv->rss_conf.rss_key);
 797         if (priv->reta_idx != NULL)
 798                 rte_free(priv->reta_idx);
 799         if (priv->config.vf)
 800                 mlx5_nl_mac_addr_flush(dev);
 801         if (priv->nl_socket_route >= 0)
 802                 close(priv->nl_socket_route);
 803         if (priv->nl_socket_rdma >= 0)
 804                 close(priv->nl_socket_rdma);
 805         if (priv->sh) {
 806                 /*
 807                  * Free the shared context in last turn, because the cleanup
 808                  * routines above may use some shared fields, like
 809                  * mlx5_nl_mac_addr_flush() uses ibdev_path for retrieveing
 810                  * ifindex if Netlink fails.
 811                  */
 812                 mlx5_free_shared_ibctx(priv->sh);
 813                 priv->sh = NULL;
 814         }
 815         ret = mlx5_hrxq_ibv_verify(dev);
 816         if (ret)
 817                 DRV_LOG(WARNING, "port %u some hash Rx queue still remain",
 818                         dev->data->port_id);
 819         ret = mlx5_ind_table_ibv_verify(dev);
 820         if (ret)
 821                 DRV_LOG(WARNING, "port %u some indirection table still remain",
 822                         dev->data->port_id);
 823         ret = mlx5_rxq_ibv_verify(dev);
 824         if (ret)
 825                 DRV_LOG(WARNING, "port %u some Verbs Rx queue still remain",
 826                         dev->data->port_id);
 827         ret = mlx5_rxq_verify(dev);
 828         if (ret)
 829                 DRV_LOG(WARNING, "port %u some Rx queues still remain",
 830                         dev->data->port_id);
 831         ret = mlx5_txq_ibv_verify(dev);
 832         if (ret)
 833                 DRV_LOG(WARNING, "port %u some Verbs Tx queue still remain",
 834                         dev->data->port_id);
 835         ret = mlx5_txq_verify(dev);
 836         if (ret)
 837                 DRV_LOG(WARNING, "port %u some Tx queues still remain",
 838                         dev->data->port_id);
 839         ret = mlx5_flow_verify(dev);
 840         if (ret)
 841                 DRV_LOG(WARNING, "port %u some flows still remain",
 842                         dev->data->port_id);
 843         if (priv->domain_id != RTE_ETH_DEV_SWITCH_DOMAIN_ID_INVALID) {
 844                 unsigned int c = 0;
 845                 uint16_t port_id;
 846
 847                 RTE_ETH_FOREACH_DEV_OF(port_id, dev->device) {
 848                         struct mlx5_priv *opriv =
 849                                 rte_eth_devices[port_id].data->dev_private;
 850
 851                         if (!opriv ||
 852                             opriv->domain_id != priv->domain_id ||
 853                             &rte_eth_devices[port_id] == dev)
 854                                 continue;
 855                         ++c;
 856                 }
 857                 if (!c)
 858                         claim_zero(rte_eth_switch_domain_free(priv->domain_id));
 859         }
 860         memset(priv, 0, sizeof(*priv));
 861         priv->domain_id = RTE_ETH_DEV_SWITCH_DOMAIN_ID_INVALID;
 862         /*
 863          * Reset mac_addrs to NULL such that it is not freed as part of
 864          * rte_eth_dev_release_port(). mac_addrs is part of dev_private so
 865          * it is freed when dev_private is freed.
 866          */
 867         dev->data->mac_addrs = NULL;
 868 }
 869
 870 const struct eth_dev_ops mlx5_dev_ops = {
 871         .dev_configure = mlx5_dev_configure,
 872         .dev_start = mlx5_dev_start,
 873         .dev_stop = mlx5_dev_stop,
 874         .dev_set_link_down = mlx5_set_link_down,
 875         .dev_set_link_up = mlx5_set_link_up,
 876         .dev_close = mlx5_dev_close,
 877         .promiscuous_enable = mlx5_promiscuous_enable,
 878         .promiscuous_disable = mlx5_promiscuous_disable,
 879         .allmulticast_enable = mlx5_allmulticast_enable,
 880         .allmulticast_disable = mlx5_allmulticast_disable,
 881         .link_update = mlx5_link_update,
 882         .stats_get = mlx5_stats_get,
 883         .stats_reset = mlx5_stats_reset,
 884         .xstats_get = mlx5_xstats_get,
 885         .xstats_reset = mlx5_xstats_reset,
 886         .xstats_get_names = mlx5_xstats_get_names,
 887         .fw_version_get = mlx5_fw_version_get,
 888         .dev_infos_get = mlx5_dev_infos_get,
 889         .read_clock = mlx5_read_clock,
 890         .dev_supported_ptypes_get = mlx5_dev_supported_ptypes_get,
 891         .vlan_filter_set = mlx5_vlan_filter_set,
 892         .rx_queue_setup = mlx5_rx_queue_setup,
 893         .tx_queue_setup = mlx5_tx_queue_setup,
 894         .rx_queue_release = mlx5_rx_queue_release,
 895         .tx_queue_release = mlx5_tx_queue_release,
 896         .flow_ctrl_get = mlx5_dev_get_flow_ctrl,
 897         .flow_ctrl_set = mlx5_dev_set_flow_ctrl,
 898         .mac_addr_remove = mlx5_mac_addr_remove,
 899         .mac_addr_add = mlx5_mac_addr_add,
 900         .mac_addr_set = mlx5_mac_addr_set,
 901         .set_mc_addr_list = mlx5_set_mc_addr_list,
 902         .mtu_set = mlx5_dev_set_mtu,
 903         .vlan_strip_queue_set = mlx5_vlan_strip_queue_set,
 904         .vlan_offload_set = mlx5_vlan_offload_set,
 905         .reta_update = mlx5_dev_rss_reta_update,
 906         .reta_query = mlx5_dev_rss_reta_query,
 907         .rss_hash_update = mlx5_rss_hash_update,
 908         .rss_hash_conf_get = mlx5_rss_hash_conf_get,
 909         .filter_ctrl = mlx5_dev_filter_ctrl,
 910         .rx_descriptor_status = mlx5_rx_descriptor_status,
 911         .tx_descriptor_status = mlx5_tx_descriptor_status,
 912         .rx_queue_count = mlx5_rx_queue_count,
 913         .rx_queue_intr_enable = mlx5_rx_intr_enable,
 914         .rx_queue_intr_disable = mlx5_rx_intr_disable,
 915         .is_removed = mlx5_is_removed,
 916 };
 917
 918 /* Available operations from secondary process. */
 919 static const struct eth_dev_ops mlx5_dev_sec_ops = {
 920         .stats_get = mlx5_stats_get,
 921         .stats_reset = mlx5_stats_reset,
 922         .xstats_get = mlx5_xstats_get,
 923         .xstats_reset = mlx5_xstats_reset,
 924         .xstats_get_names = mlx5_xstats_get_names,
 925         .fw_version_get = mlx5_fw_version_get,
 926         .dev_infos_get = mlx5_dev_infos_get,
 927         .rx_descriptor_status = mlx5_rx_descriptor_status,
 928         .tx_descriptor_status = mlx5_tx_descriptor_status,
 929 };
 930
 931 /* Available operations in flow isolated mode. */
 932 const struct eth_dev_ops mlx5_dev_ops_isolate = {
 933         .dev_configure = mlx5_dev_configure,
 934         .dev_start = mlx5_dev_start,
 935         .dev_stop = mlx5_dev_stop,
 936         .dev_set_link_down = mlx5_set_link_down,
 937         .dev_set_link_up = mlx5_set_link_up,
 938         .dev_close = mlx5_dev_close,
 939         .promiscuous_enable = mlx5_promiscuous_enable,
 940         .promiscuous_disable = mlx5_promiscuous_disable,
 941         .allmulticast_enable = mlx5_allmulticast_enable,
 942         .allmulticast_disable = mlx5_allmulticast_disable,
 943         .link_update = mlx5_link_update,
 944         .stats_get = mlx5_stats_get,
 945         .stats_reset = mlx5_stats_reset,
 946         .xstats_get = mlx5_xstats_get,
 947         .xstats_reset = mlx5_xstats_reset,
 948         .xstats_get_names = mlx5_xstats_get_names,
 949         .fw_version_get = mlx5_fw_version_get,
 950         .dev_infos_get = mlx5_dev_infos_get,
 951         .dev_supported_ptypes_get = mlx5_dev_supported_ptypes_get,
 952         .vlan_filter_set = mlx5_vlan_filter_set,
 953         .rx_queue_setup = mlx5_rx_queue_setup,
 954         .tx_queue_setup = mlx5_tx_queue_setup,
 955         .rx_queue_release = mlx5_rx_queue_release,
 956         .tx_queue_release = mlx5_tx_queue_release,
 957         .flow_ctrl_get = mlx5_dev_get_flow_ctrl,
 958         .flow_ctrl_set = mlx5_dev_set_flow_ctrl,
 959         .mac_addr_remove = mlx5_mac_addr_remove,
 960         .mac_addr_add = mlx5_mac_addr_add,
 961         .mac_addr_set = mlx5_mac_addr_set,
 962         .set_mc_addr_list = mlx5_set_mc_addr_list,
 963         .mtu_set = mlx5_dev_set_mtu,
 964         .vlan_strip_queue_set = mlx5_vlan_strip_queue_set,
 965         .vlan_offload_set = mlx5_vlan_offload_set,
 966         .filter_ctrl = mlx5_dev_filter_ctrl,
 967         .rx_descriptor_status = mlx5_rx_descriptor_status,
 968         .tx_descriptor_status = mlx5_tx_descriptor_status,
 969         .rx_queue_intr_enable = mlx5_rx_intr_enable,
 970         .rx_queue_intr_disable = mlx5_rx_intr_disable,
 971         .is_removed = mlx5_is_removed,
 972 };
 973
 974 /**
 975  * Verify and store value for device argument.
 976  *
 977  * @param[in] key
 978  *   Key argument to verify.
 979  * @param[in] val
 980  *   Value associated with key.
 981  * @param opaque
 982  *   User data.
 983  *
 984  * @return
 985  *   0 on success, a negative errno value otherwise and rte_errno is set.
 986  */
 987 static int
 988 mlx5_args_check(const char *key, const char *val, void *opaque)
 989 {
 990         struct mlx5_dev_config *config = opaque;
 991         unsigned long tmp;
 992
 993         /* No-op, port representors are processed in mlx5_dev_spawn(). */
 994         if (!strcmp(MLX5_REPRESENTOR, key))
 995                 return 0;
 996         errno = 0;
 997         tmp = strtoul(val, NULL, 0);
 998         if (errno) {
 999                 rte_errno = errno;
1000                 DRV_LOG(WARNING, "%s: \"%s\" is not a valid integer", key, val);
1001                 return -rte_errno;
1002         }
1003         if (strcmp(MLX5_RXQ_CQE_COMP_EN, key) == 0) {
1004                 config->cqe_comp = !!tmp;
1005         } else if (strcmp(MLX5_RXQ_CQE_PAD_EN, key) == 0) {
1006                 config->cqe_pad = !!tmp;
1007         } else if (strcmp(MLX5_RXQ_PKT_PAD_EN, key) == 0) {
1008                 config->hw_padding = !!tmp;
1009         } else if (strcmp(MLX5_RX_MPRQ_EN, key) == 0) {
1010                 config->mprq.enabled = !!tmp;
1011         } else if (strcmp(MLX5_RX_MPRQ_LOG_STRIDE_NUM, key) == 0) {
1012                 config->mprq.stride_num_n = tmp;
1013         } else if (strcmp(MLX5_RX_MPRQ_MAX_MEMCPY_LEN, key) == 0) {
1014                 config->mprq.max_memcpy_len = tmp;
1015         } else if (strcmp(MLX5_RXQS_MIN_MPRQ, key) == 0) {
1016                 config->mprq.min_rxqs_num = tmp;
1017         } else if (strcmp(MLX5_TXQ_INLINE, key) == 0) {
1018                 DRV_LOG(WARNING, "%s: deprecated parameter,"
1019                                  " converted to txq_inline_max", key);
1020                 config->txq_inline_max = tmp;
1021         } else if (strcmp(MLX5_TXQ_INLINE_MAX, key) == 0) {
1022                 config->txq_inline_max = tmp;
1023         } else if (strcmp(MLX5_TXQ_INLINE_MIN, key) == 0) {
1024                 config->txq_inline_min = tmp;
1025         } else if (strcmp(MLX5_TXQ_INLINE_MPW, key) == 0) {
1026                 config->txq_inline_mpw = tmp;
1027         } else if (strcmp(MLX5_TXQS_MIN_INLINE, key) == 0) {
1028                 config->txqs_inline = tmp;
1029         } else if (strcmp(MLX5_TXQS_MAX_VEC, key) == 0) {
1030                 DRV_LOG(WARNING, "%s: deprecated parameter, ignored", key);
1031         } else if (strcmp(MLX5_TXQ_MPW_EN, key) == 0) {
1032                 config->mps = !!tmp;
1033         } else if (strcmp(MLX5_TXQ_MPW_HDR_DSEG_EN, key) == 0) {
1034                 DRV_LOG(WARNING, "%s: deprecated parameter, ignored", key);
1035         } else if (strcmp(MLX5_TXQ_MAX_INLINE_LEN, key) == 0) {
1036                 DRV_LOG(WARNING, "%s: deprecated parameter,"
1037                                  " converted to txq_inline_mpw", key);
1038                 config->txq_inline_mpw = tmp;
1039         } else if (strcmp(MLX5_TX_VEC_EN, key) == 0) {
1040                 DRV_LOG(WARNING, "%s: deprecated parameter, ignored", key);
1041         } else if (strcmp(MLX5_RX_VEC_EN, key) == 0) {
1042                 config->rx_vec_en = !!tmp;
1043         } else if (strcmp(MLX5_L3_VXLAN_EN, key) == 0) {
1044                 config->l3_vxlan_en = !!tmp;
1045         } else if (strcmp(MLX5_VF_NL_EN, key) == 0) {
1046                 config->vf_nl_en = !!tmp;
1047         } else if (strcmp(MLX5_DV_ESW_EN, key) == 0) {
1048                 config->dv_esw_en = !!tmp;
1049         } else if (strcmp(MLX5_DV_FLOW_EN, key) == 0) {
1050                 config->dv_flow_en = !!tmp;
1051         } else if (strcmp(MLX5_MR_EXT_MEMSEG_EN, key) == 0) {
1052                 config->mr_ext_memseg_en = !!tmp;
1053         } else if (strcmp(MLX5_MAX_DUMP_FILES_NUM, key) == 0) {
1054                 config->max_dump_files_num = tmp;
1055         } else {
1056                 DRV_LOG(WARNING, "%s: unknown parameter", key);
1057                 rte_errno = EINVAL;
1058                 return -rte_errno;
1059         }
1060         return 0;
1061 }
1062
1063 /**
1064  * Parse device parameters.
1065  *
1066  * @param config
1067  *   Pointer to device configuration structure.
1068  * @param devargs
1069  *   Device arguments structure.
1070  *
1071  * @return
1072  *   0 on success, a negative errno value otherwise and rte_errno is set.
1073  */
1074 static int
1075 mlx5_args(struct mlx5_dev_config *config, struct rte_devargs *devargs)
1076 {
1077         const char **params = (const char *[]){
1078                 MLX5_RXQ_CQE_COMP_EN,
1079                 MLX5_RXQ_CQE_PAD_EN,
1080                 MLX5_RXQ_PKT_PAD_EN,
1081                 MLX5_RX_MPRQ_EN,
1082                 MLX5_RX_MPRQ_LOG_STRIDE_NUM,
1083                 MLX5_RX_MPRQ_MAX_MEMCPY_LEN,
1084                 MLX5_RXQS_MIN_MPRQ,
1085                 MLX5_TXQ_INLINE,
1086                 MLX5_TXQ_INLINE_MIN,
1087                 MLX5_TXQ_INLINE_MAX,
1088                 MLX5_TXQ_INLINE_MPW,
1089                 MLX5_TXQS_MIN_INLINE,
1090                 MLX5_TXQS_MAX_VEC,
1091                 MLX5_TXQ_MPW_EN,
1092                 MLX5_TXQ_MPW_HDR_DSEG_EN,
1093                 MLX5_TXQ_MAX_INLINE_LEN,
1094                 MLX5_TX_VEC_EN,
1095                 MLX5_RX_VEC_EN,
1096                 MLX5_L3_VXLAN_EN,
1097                 MLX5_VF_NL_EN,
1098                 MLX5_DV_ESW_EN,
1099                 MLX5_DV_FLOW_EN,
1100                 MLX5_MR_EXT_MEMSEG_EN,
1101                 MLX5_REPRESENTOR,
1102                 MLX5_MAX_DUMP_FILES_NUM,
1103                 NULL,
1104         };
1105         struct rte_kvargs *kvlist;
1106         int ret = 0;
1107         int i;
1108
1109         if (devargs == NULL)
1110                 return 0;
1111         /* Following UGLY cast is done to pass checkpatch. */
1112         kvlist = rte_kvargs_parse(devargs->args, params);
1113         if (kvlist == NULL) {
1114                 rte_errno = EINVAL;
1115                 return -rte_errno;
1116         }
1117         /* Process parameters. */
1118         for (i = 0; (params[i] != NULL); ++i) {
1119                 if (rte_kvargs_count(kvlist, params[i])) {
1120                         ret = rte_kvargs_process(kvlist, params[i],
1121                                                  mlx5_args_check, config);
1122                         if (ret) {
1123                                 rte_errno = EINVAL;
1124                                 rte_kvargs_free(kvlist);
1125                                 return -rte_errno;
1126                         }
1127                 }
1128         }
1129         rte_kvargs_free(kvlist);
1130         return 0;
1131 }
1132
1133 static struct rte_pci_driver mlx5_driver;
1134
1135 /**
1136  * PMD global initialization.
1137  *
1138  * Independent from individual device, this function initializes global
1139  * per-PMD data structures distinguishing primary and secondary processes.
1140  * Hence, each initialization is called once per a process.
1141  *
1142  * @return
1143  *   0 on success, a negative errno value otherwise and rte_errno is set.
1144  */
1145 static int
1146 mlx5_init_once(void)
1147 {
1148         struct mlx5_shared_data *sd;
1149         struct mlx5_local_data *ld = &mlx5_local_data;
1150         int ret = 0;
1151
1152         if (mlx5_init_shared_data())
1153                 return -rte_errno;
1154         sd = mlx5_shared_data;
1155         assert(sd);
1156         rte_spinlock_lock(&sd->lock);
1157         switch (rte_eal_process_type()) {
1158         case RTE_PROC_PRIMARY:
1159                 if (sd->init_done)
1160                         break;
1161                 LIST_INIT(&sd->mem_event_cb_list);
1162                 rte_rwlock_init(&sd->mem_event_rwlock);
1163                 rte_mem_event_callback_register("MLX5_MEM_EVENT_CB",
1164                                                 mlx5_mr_mem_event_cb, NULL);
1165                 ret = mlx5_mp_init_primary();
1166                 if (ret)
1167                         goto out;
1168                 sd->init_done = true;
1169                 break;
1170         case RTE_PROC_SECONDARY:
1171                 if (ld->init_done)
1172                         break;
1173                 ret = mlx5_mp_init_secondary();
1174                 if (ret)
1175                         goto out;
1176                 ++sd->secondary_cnt;
1177                 ld->init_done = true;
1178                 break;
1179         default:
1180                 break;
1181         }
1182 out:
1183         rte_spinlock_unlock(&sd->lock);
1184         return ret;
1185 }
1186
1187 /**
1188  * Spawn an Ethernet device from Verbs information.
1189  *
1190  * @param dpdk_dev
1191  *   Backing DPDK device.
1192  * @param spawn
1193  *   Verbs device parameters (name, port, switch_info) to spawn.
1194  * @param config
1195  *   Device configuration parameters.
1196  *
1197  * @return
1198  *   A valid Ethernet device object on success, NULL otherwise and rte_errno
1199  *   is set. The following errors are defined:
1200  *
1201  *   EBUSY: device is not supposed to be spawned.
1202  *   EEXIST: device is already spawned
1203  */
1204 static struct rte_eth_dev *
1205 mlx5_dev_spawn(struct rte_device *dpdk_dev,
1206                struct mlx5_dev_spawn_data *spawn,
1207                struct mlx5_dev_config config)
1208 {
1209         const struct mlx5_switch_info *switch_info = &spawn->info;
1210         struct mlx5_ibv_shared *sh = NULL;
1211         struct ibv_port_attr port_attr;
1212         struct mlx5dv_context dv_attr = { .comp_mask = 0 };
1213         struct rte_eth_dev *eth_dev = NULL;
1214         struct mlx5_priv *priv = NULL;
1215         int err = 0;
1216         unsigned int hw_padding = 0;
1217         unsigned int mps;
1218         unsigned int cqe_comp;
1219         unsigned int cqe_pad = 0;
1220         unsigned int tunnel_en = 0;
1221         unsigned int mpls_en = 0;
1222         unsigned int swp = 0;
1223         unsigned int mprq = 0;
1224         unsigned int mprq_min_stride_size_n = 0;
1225         unsigned int mprq_max_stride_size_n = 0;
1226         unsigned int mprq_min_stride_num_n = 0;
1227         unsigned int mprq_max_stride_num_n = 0;
1228         struct rte_ether_addr mac;
1229         char name[RTE_ETH_NAME_MAX_LEN];
1230         int own_domain_id = 0;
1231         uint16_t port_id;
1232         unsigned int i;
1233
1234         /* Determine if this port representor is supposed to be spawned. */
1235         if (switch_info->representor && dpdk_dev->devargs) {
1236                 struct rte_eth_devargs eth_da;
1237
1238                 err = rte_eth_devargs_parse(dpdk_dev->devargs->args, &eth_da);
1239                 if (err) {
1240                         rte_errno = -err;
1241                         DRV_LOG(ERR, "failed to process device arguments: %s",
1242                                 strerror(rte_errno));
1243                         return NULL;
1244                 }
1245                 for (i = 0; i < eth_da.nb_representor_ports; ++i)
1246                         if (eth_da.representor_ports[i] ==
1247                             (uint16_t)switch_info->port_name)
1248                                 break;
1249                 if (i == eth_da.nb_representor_ports) {
1250                         rte_errno = EBUSY;
1251                         return NULL;
1252                 }
1253         }
1254         /* Build device name. */
1255         if (!switch_info->representor)
1256                 strlcpy(name, dpdk_dev->name, sizeof(name));
1257         else
1258                 snprintf(name, sizeof(name), "%s_representor_%u",
1259                          dpdk_dev->name, switch_info->port_name);
1260         /* check if the device is already spawned */
1261         if (rte_eth_dev_get_port_by_name(name, &port_id) == 0) {
1262                 rte_errno = EEXIST;
1263                 return NULL;
1264         }
1265         DRV_LOG(DEBUG, "naming Ethernet device \"%s\"", name);
1266         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1267                 eth_dev = rte_eth_dev_attach_secondary(name);
1268                 if (eth_dev == NULL) {
1269                         DRV_LOG(ERR, "can not attach rte ethdev");
1270                         rte_errno = ENOMEM;
1271                         return NULL;
1272                 }
1273                 eth_dev->device = dpdk_dev;
1274                 eth_dev->dev_ops = &mlx5_dev_sec_ops;
1275                 err = mlx5_proc_priv_init(eth_dev);
1276                 if (err)
1277                         return NULL;
1278                 /* Receive command fd from primary process */
1279                 err = mlx5_mp_req_verbs_cmd_fd(eth_dev);
1280                 if (err < 0)
1281                         return NULL;
1282                 /* Remap UAR for Tx queues. */
1283                 err = mlx5_tx_uar_init_secondary(eth_dev, err);
1284                 if (err)
1285                         return NULL;
1286                 /*
1287                  * Ethdev pointer is still required as input since
1288                  * the primary device is not accessible from the
1289                  * secondary process.
1290                  */
1291                 eth_dev->rx_pkt_burst = mlx5_select_rx_function(eth_dev);
1292                 eth_dev->tx_pkt_burst = mlx5_select_tx_function(eth_dev);
1293                 return eth_dev;
1294         }
1295         sh = mlx5_alloc_shared_ibctx(spawn);
1296         if (!sh)
1297                 return NULL;
1298         config.devx = sh->devx;
1299 #ifdef HAVE_IBV_MLX5_MOD_SWP
1300         dv_attr.comp_mask |= MLX5DV_CONTEXT_MASK_SWP;
1301 #endif
1302         /*
1303          * Multi-packet send is supported by ConnectX-4 Lx PF as well
1304          * as all ConnectX-5 devices.
1305          */
1306 #ifdef HAVE_IBV_DEVICE_TUNNEL_SUPPORT
1307         dv_attr.comp_mask |= MLX5DV_CONTEXT_MASK_TUNNEL_OFFLOADS;
1308 #endif
1309 #ifdef HAVE_IBV_DEVICE_STRIDING_RQ_SUPPORT
1310         dv_attr.comp_mask |= MLX5DV_CONTEXT_MASK_STRIDING_RQ;
1311 #endif
1312         mlx5_glue->dv_query_device(sh->ctx, &dv_attr);
1313         if (dv_attr.flags & MLX5DV_CONTEXT_FLAGS_MPW_ALLOWED) {
1314                 if (dv_attr.flags & MLX5DV_CONTEXT_FLAGS_ENHANCED_MPW) {
1315                         DRV_LOG(DEBUG, "enhanced MPW is supported");
1316                         mps = MLX5_MPW_ENHANCED;
1317                 } else {
1318                         DRV_LOG(DEBUG, "MPW is supported");
1319                         mps = MLX5_MPW;
1320                 }
1321         } else {
1322                 DRV_LOG(DEBUG, "MPW isn't supported");
1323                 mps = MLX5_MPW_DISABLED;
1324         }
1325 #ifdef HAVE_IBV_MLX5_MOD_SWP
1326         if (dv_attr.comp_mask & MLX5DV_CONTEXT_MASK_SWP)
1327                 swp = dv_attr.sw_parsing_caps.sw_parsing_offloads;
1328         DRV_LOG(DEBUG, "SWP support: %u", swp);
1329 #endif
1330         config.swp = !!swp;
1331 #ifdef HAVE_IBV_DEVICE_STRIDING_RQ_SUPPORT
1332         if (dv_attr.comp_mask & MLX5DV_CONTEXT_MASK_STRIDING_RQ) {
1333                 struct mlx5dv_striding_rq_caps mprq_caps =
1334                         dv_attr.striding_rq_caps;
1335
1336                 DRV_LOG(DEBUG, "\tmin_single_stride_log_num_of_bytes: %d",
1337                         mprq_caps.min_single_stride_log_num_of_bytes);
1338                 DRV_LOG(DEBUG, "\tmax_single_stride_log_num_of_bytes: %d",
1339                         mprq_caps.max_single_stride_log_num_of_bytes);
1340                 DRV_LOG(DEBUG, "\tmin_single_wqe_log_num_of_strides: %d",
1341                         mprq_caps.min_single_wqe_log_num_of_strides);
1342                 DRV_LOG(DEBUG, "\tmax_single_wqe_log_num_of_strides: %d",
1343                         mprq_caps.max_single_wqe_log_num_of_strides);
1344                 DRV_LOG(DEBUG, "\tsupported_qpts: %d",
1345                         mprq_caps.supported_qpts);
1346                 DRV_LOG(DEBUG, "device supports Multi-Packet RQ");
1347                 mprq = 1;
1348                 mprq_min_stride_size_n =
1349                         mprq_caps.min_single_stride_log_num_of_bytes;
1350                 mprq_max_stride_size_n =
1351                         mprq_caps.max_single_stride_log_num_of_bytes;
1352                 mprq_min_stride_num_n =
1353                         mprq_caps.min_single_wqe_log_num_of_strides;
1354                 mprq_max_stride_num_n =
1355                         mprq_caps.max_single_wqe_log_num_of_strides;
1356                 config.mprq.stride_num_n = RTE_MAX(MLX5_MPRQ_STRIDE_NUM_N,
1357                                                    mprq_min_stride_num_n);
1358         }
1359 #endif
1360         if (RTE_CACHE_LINE_SIZE == 128 &&
1361             !(dv_attr.flags & MLX5DV_CONTEXT_FLAGS_CQE_128B_COMP))
1362                 cqe_comp = 0;
1363         else
1364                 cqe_comp = 1;
1365         config.cqe_comp = cqe_comp;
1366 #ifdef HAVE_IBV_MLX5_MOD_CQE_128B_PAD
1367         /* Whether device supports 128B Rx CQE padding. */
1368         cqe_pad = RTE_CACHE_LINE_SIZE == 128 &&
1369                   (dv_attr.flags & MLX5DV_CONTEXT_FLAGS_CQE_128B_PAD);
1370 #endif
1371 #ifdef HAVE_IBV_DEVICE_TUNNEL_SUPPORT
1372         if (dv_attr.comp_mask & MLX5DV_CONTEXT_MASK_TUNNEL_OFFLOADS) {
1373                 tunnel_en = ((dv_attr.tunnel_offloads_caps &
1374                               MLX5DV_RAW_PACKET_CAP_TUNNELED_OFFLOAD_VXLAN) &&
1375                              (dv_attr.tunnel_offloads_caps &
1376                               MLX5DV_RAW_PACKET_CAP_TUNNELED_OFFLOAD_GRE));
1377         }
1378         DRV_LOG(DEBUG, "tunnel offloading is %ssupported",
1379                 tunnel_en ? "" : "not ");
1380 #else
1381         DRV_LOG(WARNING,
1382                 "tunnel offloading disabled due to old OFED/rdma-core version");
1383 #endif
1384         config.tunnel_en = tunnel_en;
1385 #ifdef HAVE_IBV_DEVICE_MPLS_SUPPORT
1386         mpls_en = ((dv_attr.tunnel_offloads_caps &
1387                     MLX5DV_RAW_PACKET_CAP_TUNNELED_OFFLOAD_CW_MPLS_OVER_GRE) &&
1388                    (dv_attr.tunnel_offloads_caps &
1389                     MLX5DV_RAW_PACKET_CAP_TUNNELED_OFFLOAD_CW_MPLS_OVER_UDP));
1390         DRV_LOG(DEBUG, "MPLS over GRE/UDP tunnel offloading is %ssupported",
1391                 mpls_en ? "" : "not ");
1392 #else
1393         DRV_LOG(WARNING, "MPLS over GRE/UDP tunnel offloading disabled due to"
1394                 " old OFED/rdma-core version or firmware configuration");
1395 #endif
1396         config.mpls_en = mpls_en;
1397         /* Check port status. */
1398         err = mlx5_glue->query_port(sh->ctx, spawn->ibv_port, &port_attr);
1399         if (err) {
1400                 DRV_LOG(ERR, "port query failed: %s", strerror(err));
1401                 goto error;
1402         }
1403         if (port_attr.link_layer != IBV_LINK_LAYER_ETHERNET) {
1404                 DRV_LOG(ERR, "port is not configured in Ethernet mode");
1405                 err = EINVAL;
1406                 goto error;
1407         }
1408         if (port_attr.state != IBV_PORT_ACTIVE)
1409                 DRV_LOG(DEBUG, "port is not active: \"%s\" (%d)",
1410                         mlx5_glue->port_state_str(port_attr.state),
1411                         port_attr.state);
1412         /* Allocate private eth device data. */
1413         priv = rte_zmalloc("ethdev private structure",
1414                            sizeof(*priv),
1415                            RTE_CACHE_LINE_SIZE);
1416         if (priv == NULL) {
1417                 DRV_LOG(ERR, "priv allocation failure");
1418                 err = ENOMEM;
1419                 goto error;
1420         }
1421         priv->sh = sh;
1422         priv->ibv_port = spawn->ibv_port;
1423         priv->mtu = RTE_ETHER_MTU;
1424 #ifndef RTE_ARCH_64
1425         /* Initialize UAR access locks for 32bit implementations. */
1426         rte_spinlock_init(&priv->uar_lock_cq);
1427         for (i = 0; i < MLX5_UAR_PAGE_NUM_MAX; i++)
1428                 rte_spinlock_init(&priv->uar_lock[i]);
1429 #endif
1430         /* Some internal functions rely on Netlink sockets, open them now. */
1431         priv->nl_socket_rdma = mlx5_nl_init(NETLINK_RDMA);
1432         priv->nl_socket_route = mlx5_nl_init(NETLINK_ROUTE);
1433         priv->nl_sn = 0;
1434         priv->representor = !!switch_info->representor;
1435         priv->master = !!switch_info->master;
1436         priv->domain_id = RTE_ETH_DEV_SWITCH_DOMAIN_ID_INVALID;
1437         /*
1438          * Currently we support single E-Switch per PF configurations
1439          * only and vport_id field contains the vport index for
1440          * associated VF, which is deduced from representor port name.
1441          * For example, let's have the IB device port 10, it has
1442          * attached network device eth0, which has port name attribute
1443          * pf0vf2, we can deduce the VF number as 2, and set vport index
1444          * as 3 (2+1). This assigning schema should be changed if the
1445          * multiple E-Switch instances per PF configurations or/and PCI
1446          * subfunctions are added.
1447          */
1448         priv->vport_id = switch_info->representor ?
1449                          switch_info->port_name + 1 : -1;
1450         /* representor_id field keeps the unmodified port/VF index. */
1451         priv->representor_id = switch_info->representor ?
1452                                switch_info->port_name : -1;
1453         /*
1454          * Look for sibling devices in order to reuse their switch domain
1455          * if any, otherwise allocate one.
1456          */
1457         RTE_ETH_FOREACH_DEV_OF(port_id, dpdk_dev) {
1458                 const struct mlx5_priv *opriv =
1459                         rte_eth_devices[port_id].data->dev_private;
1460
1461                 if (!opriv ||
1462                         opriv->domain_id ==
1463                         RTE_ETH_DEV_SWITCH_DOMAIN_ID_INVALID)
1464                         continue;
1465                 priv->domain_id = opriv->domain_id;
1466                 break;
1467         }
1468         if (priv->domain_id == RTE_ETH_DEV_SWITCH_DOMAIN_ID_INVALID) {
1469                 err = rte_eth_switch_domain_alloc(&priv->domain_id);
1470                 if (err) {
1471                         err = rte_errno;
1472                         DRV_LOG(ERR, "unable to allocate switch domain: %s",
1473                                 strerror(rte_errno));
1474                         goto error;
1475                 }
1476                 own_domain_id = 1;
1477         }
1478         err = mlx5_args(&config, dpdk_dev->devargs);
1479         if (err) {
1480                 err = rte_errno;
1481                 DRV_LOG(ERR, "failed to process device arguments: %s",
1482                         strerror(rte_errno));
1483                 goto error;
1484         }
1485         config.hw_csum = !!(sh->device_attr.device_cap_flags_ex &
1486                             IBV_DEVICE_RAW_IP_CSUM);
1487         DRV_LOG(DEBUG, "checksum offloading is %ssupported",
1488                 (config.hw_csum ? "" : "not "));
1489 #if !defined(HAVE_IBV_DEVICE_COUNTERS_SET_V42) && \
1490         !defined(HAVE_IBV_DEVICE_COUNTERS_SET_V45)
1491         DRV_LOG(DEBUG, "counters are not supported");
1492 #endif
1493 #ifndef HAVE_IBV_FLOW_DV_SUPPORT
1494         if (config.dv_flow_en) {
1495                 DRV_LOG(WARNING, "DV flow is not supported");
1496                 config.dv_flow_en = 0;
1497         }
1498 #endif
1499         config.ind_table_max_size =
1500                 sh->device_attr.rss_caps.max_rwq_indirection_table_size;
1501         /*
1502          * Remove this check once DPDK supports larger/variable
1503          * indirection tables.
1504          */
1505         if (config.ind_table_max_size > (unsigned int)ETH_RSS_RETA_SIZE_512)
1506                 config.ind_table_max_size = ETH_RSS_RETA_SIZE_512;
1507         DRV_LOG(DEBUG, "maximum Rx indirection table size is %u",
1508                 config.ind_table_max_size);
1509         config.hw_vlan_strip = !!(sh->device_attr.raw_packet_caps &
1510                                   IBV_RAW_PACKET_CAP_CVLAN_STRIPPING);
1511         DRV_LOG(DEBUG, "VLAN stripping is %ssupported",
1512                 (config.hw_vlan_strip ? "" : "not "));
1513         config.hw_fcs_strip = !!(sh->device_attr.raw_packet_caps &
1514                                  IBV_RAW_PACKET_CAP_SCATTER_FCS);
1515         DRV_LOG(DEBUG, "FCS stripping configuration is %ssupported",
1516                 (config.hw_fcs_strip ? "" : "not "));
1517 #if defined(HAVE_IBV_WQ_FLAG_RX_END_PADDING)
1518         hw_padding = !!sh->device_attr.rx_pad_end_addr_align;
1519 #elif defined(HAVE_IBV_WQ_FLAGS_PCI_WRITE_END_PADDING)
1520         hw_padding = !!(sh->device_attr.device_cap_flags_ex &
1521                         IBV_DEVICE_PCI_WRITE_END_PADDING);
1522 #endif
1523         if (config.hw_padding && !hw_padding) {
1524                 DRV_LOG(DEBUG, "Rx end alignment padding isn't supported");
1525                 config.hw_padding = 0;
1526         } else if (config.hw_padding) {
1527                 DRV_LOG(DEBUG, "Rx end alignment padding is enabled");
1528         }
1529         config.tso = (sh->device_attr.tso_caps.max_tso > 0 &&
1530                       (sh->device_attr.tso_caps.supported_qpts &
1531                        (1 << IBV_QPT_RAW_PACKET)));
1532         if (config.tso)
1533                 config.tso_max_payload_sz = sh->device_attr.tso_caps.max_tso;
1534         /*
1535          * MPW is disabled by default, while the Enhanced MPW is enabled
1536          * by default.
1537          */
1538         if (config.mps == MLX5_ARG_UNSET)
1539                 config.mps = (mps == MLX5_MPW_ENHANCED) ? MLX5_MPW_ENHANCED :
1540                                                           MLX5_MPW_DISABLED;
1541         else
1542                 config.mps = config.mps ? mps : MLX5_MPW_DISABLED;
1543         DRV_LOG(INFO, "%sMPS is %s",
1544                 config.mps == MLX5_MPW_ENHANCED ? "enhanced " : "",
1545                 config.mps != MLX5_MPW_DISABLED ? "enabled" : "disabled");
1546         if (config.cqe_comp && !cqe_comp) {
1547                 DRV_LOG(WARNING, "Rx CQE compression isn't supported");
1548                 config.cqe_comp = 0;
1549         }
1550         if (config.cqe_pad && !cqe_pad) {
1551                 DRV_LOG(WARNING, "Rx CQE padding isn't supported");
1552                 config.cqe_pad = 0;
1553         } else if (config.cqe_pad) {
1554                 DRV_LOG(INFO, "Rx CQE padding is enabled");
1555         }
1556         if (config.mprq.enabled && mprq) {
1557                 if (config.mprq.stride_num_n > mprq_max_stride_num_n ||
1558                     config.mprq.stride_num_n < mprq_min_stride_num_n) {
1559                         config.mprq.stride_num_n =
1560                                 RTE_MAX(MLX5_MPRQ_STRIDE_NUM_N,
1561                                         mprq_min_stride_num_n);
1562                         DRV_LOG(WARNING,
1563                                 "the number of strides"
1564                                 " for Multi-Packet RQ is out of range,"
1565                                 " setting default value (%u)",
1566                                 1 << config.mprq.stride_num_n);
1567                 }
1568                 config.mprq.min_stride_size_n = mprq_min_stride_size_n;
1569                 config.mprq.max_stride_size_n = mprq_max_stride_size_n;
1570         } else if (config.mprq.enabled && !mprq) {
1571                 DRV_LOG(WARNING, "Multi-Packet RQ isn't supported");
1572                 config.mprq.enabled = 0;
1573         }
1574         if (config.max_dump_files_num == 0)
1575                 config.max_dump_files_num = 128;
1576         eth_dev = rte_eth_dev_allocate(name);
1577         if (eth_dev == NULL) {
1578                 DRV_LOG(ERR, "can not allocate rte ethdev");
1579                 err = ENOMEM;
1580                 goto error;
1581         }
1582         /* Flag to call rte_eth_dev_release_port() in rte_eth_dev_close(). */
1583         eth_dev->data->dev_flags |= RTE_ETH_DEV_CLOSE_REMOVE;
1584         if (priv->representor) {
1585                 eth_dev->data->dev_flags |= RTE_ETH_DEV_REPRESENTOR;
1586                 eth_dev->data->representor_id = priv->representor_id;
1587         }
1588         eth_dev->data->dev_private = priv;
1589         priv->dev_data = eth_dev->data;
1590         eth_dev->data->mac_addrs = priv->mac;
1591         eth_dev->device = dpdk_dev;
1592         /* Configure the first MAC address by default. */
1593         if (mlx5_get_mac(eth_dev, &mac.addr_bytes)) {
1594                 DRV_LOG(ERR,
1595                         "port %u cannot get MAC address, is mlx5_en"
1596                         " loaded? (errno: %s)",
1597                         eth_dev->data->port_id, strerror(rte_errno));
1598                 err = ENODEV;
1599                 goto error;
1600         }
1601         DRV_LOG(INFO,
1602                 "port %u MAC address is %02x:%02x:%02x:%02x:%02x:%02x",
1603                 eth_dev->data->port_id,
1604                 mac.addr_bytes[0], mac.addr_bytes[1],
1605                 mac.addr_bytes[2], mac.addr_bytes[3],
1606                 mac.addr_bytes[4], mac.addr_bytes[5]);
1607 #ifndef NDEBUG
1608         {
1609                 char ifname[IF_NAMESIZE];
1610
1611                 if (mlx5_get_ifname(eth_dev, &ifname) == 0)
1612                         DRV_LOG(DEBUG, "port %u ifname is \"%s\"",
1613                                 eth_dev->data->port_id, ifname);
1614                 else
1615                         DRV_LOG(DEBUG, "port %u ifname is unknown",
1616                                 eth_dev->data->port_id);
1617         }
1618 #endif
1619         /* Get actual MTU if possible. */
1620         err = mlx5_get_mtu(eth_dev, &priv->mtu);
1621         if (err) {
1622                 err = rte_errno;
1623                 goto error;
1624         }
1625         DRV_LOG(DEBUG, "port %u MTU is %u", eth_dev->data->port_id,
1626                 priv->mtu);
1627         /* Initialize burst functions to prevent crashes before link-up. */
1628         eth_dev->rx_pkt_burst = removed_rx_burst;
1629         eth_dev->tx_pkt_burst = removed_tx_burst;
1630         eth_dev->dev_ops = &mlx5_dev_ops;
1631         /* Register MAC address. */
1632         claim_zero(mlx5_mac_addr_add(eth_dev, &mac, 0, 0));
1633         if (config.vf && config.vf_nl_en)
1634                 mlx5_nl_mac_addr_sync(eth_dev);
1635         TAILQ_INIT(&priv->flows);
1636         TAILQ_INIT(&priv->ctrl_flows);
1637         /* Hint libmlx5 to use PMD allocator for data plane resources */
1638         struct mlx5dv_ctx_allocators alctr = {
1639                 .alloc = &mlx5_alloc_verbs_buf,
1640                 .free = &mlx5_free_verbs_buf,
1641                 .data = priv,
1642         };
1643         mlx5_glue->dv_set_context_attr(sh->ctx,
1644                                        MLX5DV_CTX_ATTR_BUF_ALLOCATORS,
1645                                        (void *)((uintptr_t)&alctr));
1646         /* Bring Ethernet device up. */
1647         DRV_LOG(DEBUG, "port %u forcing Ethernet interface up",
1648                 eth_dev->data->port_id);
1649         mlx5_set_link_up(eth_dev);
1650         /*
1651          * Even though the interrupt handler is not installed yet,
1652          * interrupts will still trigger on the async_fd from
1653          * Verbs context returned by ibv_open_device().
1654          */
1655         mlx5_link_update(eth_dev, 0);
1656 #ifdef HAVE_IBV_DEVX_OBJ
1657         if (config.devx) {
1658                 priv->counter_fallback = 0;
1659                 err = mlx5_devx_cmd_query_hca_attr(sh->ctx, &config.hca_attr);
1660                 if (err) {
1661                         err = -err;
1662                         goto error;
1663                 }
1664                 if (!config.hca_attr.flow_counters_dump)
1665                         priv->counter_fallback = 1;
1666 #ifndef HAVE_IBV_DEVX_ASYNC
1667                 priv->counter_fallback = 1;
1668 #endif
1669                 if (priv->counter_fallback)
1670                         DRV_LOG(INFO, "Use fall-back DV counter management\n");
1671         }
1672 #endif
1673 #ifdef HAVE_MLX5DV_DR_ESWITCH
1674         if (!(config.hca_attr.eswitch_manager && config.dv_flow_en &&
1675               (switch_info->representor || switch_info->master)))
1676                 config.dv_esw_en = 0;
1677 #else
1678         config.dv_esw_en = 0;
1679 #endif
1680         /* Store device configuration on private structure. */
1681         priv->config = config;
1682         if (config.dv_flow_en) {
1683                 err = mlx5_alloc_shared_dr(priv);
1684                 if (err)
1685                         goto error;
1686         }
1687         /* Supported Verbs flow priority number detection. */
1688         err = mlx5_flow_discover_priorities(eth_dev);
1689         if (err < 0) {
1690                 err = -err;
1691                 goto error;
1692         }
1693         priv->config.flow_prio = err;
1694         /* Add device to memory callback list. */
1695         rte_rwlock_write_lock(&mlx5_shared_data->mem_event_rwlock);
1696         LIST_INSERT_HEAD(&mlx5_shared_data->mem_event_cb_list,
1697                          sh, mem_event_cb);
1698         rte_rwlock_write_unlock(&mlx5_shared_data->mem_event_rwlock);
1699         return eth_dev;
1700 error:
1701         if (priv) {
1702                 if (priv->sh)
1703                         mlx5_free_shared_dr(priv);
1704                 if (priv->nl_socket_route >= 0)
1705                         close(priv->nl_socket_route);
1706                 if (priv->nl_socket_rdma >= 0)
1707                         close(priv->nl_socket_rdma);
1708                 if (own_domain_id)
1709                         claim_zero(rte_eth_switch_domain_free(priv->domain_id));
1710                 rte_free(priv);
1711                 if (eth_dev != NULL)
1712                         eth_dev->data->dev_private = NULL;
1713         }
1714         if (eth_dev != NULL) {
1715                 /* mac_addrs must not be freed alone because part of dev_private */
1716                 eth_dev->data->mac_addrs = NULL;
1717                 rte_eth_dev_release_port(eth_dev);
1718         }
1719         if (sh)
1720                 mlx5_free_shared_ibctx(sh);
1721         assert(err > 0);
1722         rte_errno = err;
1723         return NULL;
1724 }
1725
1726 /**
1727  * Comparison callback to sort device data.
1728  *
1729  * This is meant to be used with qsort().
1730  *
1731  * @param a[in]
1732  *   Pointer to pointer to first data object.
1733  * @param b[in]
1734  *   Pointer to pointer to second data object.
1735  *
1736  * @return
1737  *   0 if both objects are equal, less than 0 if the first argument is less
1738  *   than the second, greater than 0 otherwise.
1739  */
1740 static int
1741 mlx5_dev_spawn_data_cmp(const void *a, const void *b)
1742 {
1743         const struct mlx5_switch_info *si_a =
1744                 &((const struct mlx5_dev_spawn_data *)a)->info;
1745         const struct mlx5_switch_info *si_b =
1746                 &((const struct mlx5_dev_spawn_data *)b)->info;
1747         int ret;
1748
1749         /* Master device first. */
1750         ret = si_b->master - si_a->master;
1751         if (ret)
1752                 return ret;
1753         /* Then representor devices. */
1754         ret = si_b->representor - si_a->representor;
1755         if (ret)
1756                 return ret;
1757         /* Unidentified devices come last in no specific order. */
1758         if (!si_a->representor)
1759                 return 0;
1760         /* Order representors by name. */
1761         return si_a->port_name - si_b->port_name;
1762 }
1763
1764 /**
1765  * DPDK callback to register a PCI device.
1766  *
1767  * This function spawns Ethernet devices out of a given PCI device.
1768  *
1769  * @param[in] pci_drv
1770  *   PCI driver structure (mlx5_driver).
1771  * @param[in] pci_dev
1772  *   PCI device information.
1773  *
1774  * @return
1775  *   0 on success, a negative errno value otherwise and rte_errno is set.
1776  */
1777 static int
1778 mlx5_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
1779                struct rte_pci_device *pci_dev)
1780 {
1781         struct ibv_device **ibv_list;
1782         /*
1783          * Number of found IB Devices matching with requested PCI BDF.
1784          * nd != 1 means there are multiple IB devices over the same
1785          * PCI device and we have representors and master.
1786          */
1787         unsigned int nd = 0;
1788         /*
1789          * Number of found IB device Ports. nd = 1 and np = 1..n means
1790          * we have the single multiport IB device, and there may be
1791          * representors attached to some of found ports.
1792          */
1793         unsigned int np = 0;
1794         /*
1795          * Number of DPDK ethernet devices to Spawn - either over
1796          * multiple IB devices or multiple ports of single IB device.
1797          * Actually this is the number of iterations to spawn.
1798          */
1799         unsigned int ns = 0;
1800         struct mlx5_dev_config dev_config;
1801         int ret;
1802
1803         ret = mlx5_init_once();
1804         if (ret) {
1805                 DRV_LOG(ERR, "unable to init PMD global data: %s",
1806                         strerror(rte_errno));
1807                 return -rte_errno;
1808         }
1809         assert(pci_drv == &mlx5_driver);
1810         errno = 0;
1811         ibv_list = mlx5_glue->get_device_list(&ret);
1812         if (!ibv_list) {
1813                 rte_errno = errno ? errno : ENOSYS;
1814                 DRV_LOG(ERR, "cannot list devices, is ib_uverbs loaded?");
1815                 return -rte_errno;
1816         }
1817         /*
1818          * First scan the list of all Infiniband devices to find
1819          * matching ones, gathering into the list.
1820          */
1821         struct ibv_device *ibv_match[ret + 1];
1822         int nl_route = -1;
1823         int nl_rdma = -1;
1824         unsigned int i;
1825
1826         while (ret-- > 0) {
1827                 struct rte_pci_addr pci_addr;
1828
1829                 DRV_LOG(DEBUG, "checking device \"%s\"", ibv_list[ret]->name);
1830                 if (mlx5_ibv_device_to_pci_addr(ibv_list[ret], &pci_addr))
1831                         continue;
1832                 if (pci_dev->addr.domain != pci_addr.domain ||
1833                     pci_dev->addr.bus != pci_addr.bus ||
1834                     pci_dev->addr.devid != pci_addr.devid ||
1835                     pci_dev->addr.function != pci_addr.function)
1836                         continue;
1837                 DRV_LOG(INFO, "PCI information matches for device \"%s\"",
1838                         ibv_list[ret]->name);
1839                 ibv_match[nd++] = ibv_list[ret];
1840         }
1841         ibv_match[nd] = NULL;
1842         if (!nd) {
1843                 /* No device matches, just complain and bail out. */
1844                 mlx5_glue->free_device_list(ibv_list);
1845                 DRV_LOG(WARNING,
1846                         "no Verbs device matches PCI device " PCI_PRI_FMT ","
1847                         " are kernel drivers loaded?",
1848                         pci_dev->addr.domain, pci_dev->addr.bus,
1849                         pci_dev->addr.devid, pci_dev->addr.function);
1850                 rte_errno = ENOENT;
1851                 ret = -rte_errno;
1852                 return ret;
1853         }
1854         nl_route = mlx5_nl_init(NETLINK_ROUTE);
1855         nl_rdma = mlx5_nl_init(NETLINK_RDMA);
1856         if (nd == 1) {
1857                 /*
1858                  * Found single matching device may have multiple ports.
1859                  * Each port may be representor, we have to check the port
1860                  * number and check the representors existence.
1861                  */
1862                 if (nl_rdma >= 0)
1863                         np = mlx5_nl_portnum(nl_rdma, ibv_match[0]->name);
1864                 if (!np)
1865                         DRV_LOG(WARNING, "can not get IB device \"%s\""
1866                                          " ports number", ibv_match[0]->name);
1867         }
1868         /*
1869          * Now we can determine the maximal
1870          * amount of devices to be spawned.
1871          */
1872         struct mlx5_dev_spawn_data list[np ? np : nd];
1873
1874         if (np > 1) {
1875                 /*
1876                  * Single IB device with multiple ports found,
1877                  * it may be E-Switch master device and representors.
1878                  * We have to perform identification trough the ports.
1879                  */
1880                 assert(nl_rdma >= 0);
1881                 assert(ns == 0);
1882                 assert(nd == 1);
1883                 for (i = 1; i <= np; ++i) {
1884                         list[ns].max_port = np;
1885                         list[ns].ibv_port = i;
1886                         list[ns].ibv_dev = ibv_match[0];
1887                         list[ns].eth_dev = NULL;
1888                         list[ns].pci_dev = pci_dev;
1889                         list[ns].ifindex = mlx5_nl_ifindex
1890                                         (nl_rdma, list[ns].ibv_dev->name, i);
1891                         if (!list[ns].ifindex) {
1892                                 /*
1893                                  * No network interface index found for the
1894                                  * specified port, it means there is no
1895                                  * representor on this port. It's OK,
1896                                  * there can be disabled ports, for example
1897                                  * if sriov_numvfs < sriov_totalvfs.
1898                                  */
1899                                 continue;
1900                         }
1901                         ret = -1;
1902                         if (nl_route >= 0)
1903                                 ret = mlx5_nl_switch_info
1904                                                (nl_route,
1905                                                 list[ns].ifindex,
1906                                                 &list[ns].info);
1907                         if (ret || (!list[ns].info.representor &&
1908                                     !list[ns].info.master)) {
1909                                 /*
1910                                  * We failed to recognize representors with
1911                                  * Netlink, let's try to perform the task
1912                                  * with sysfs.
1913                                  */
1914                                 ret =  mlx5_sysfs_switch_info
1915                                                 (list[ns].ifindex,
1916                                                  &list[ns].info);
1917                         }
1918                         if (!ret && (list[ns].info.representor ^
1919                                      list[ns].info.master))
1920                                 ns++;
1921                 }
1922                 if (!ns) {
1923                         DRV_LOG(ERR,
1924                                 "unable to recognize master/representors"
1925                                 " on the IB device with multiple ports");
1926                         rte_errno = ENOENT;
1927                         ret = -rte_errno;
1928                         goto exit;
1929                 }
1930         } else {
1931                 /*
1932                  * The existence of several matching entries (nd > 1) means
1933                  * port representors have been instantiated. No existing Verbs
1934                  * call nor sysfs entries can tell them apart, this can only
1935                  * be done through Netlink calls assuming kernel drivers are
1936                  * recent enough to support them.
1937                  *
1938                  * In the event of identification failure through Netlink,
1939                  * try again through sysfs, then:
1940                  *
1941                  * 1. A single IB device matches (nd == 1) with single
1942                  *    port (np=0/1) and is not a representor, assume
1943                  *    no switch support.
1944                  *
1945                  * 2. Otherwise no safe assumptions can be made;
1946                  *    complain louder and bail out.
1947                  */
1948                 np = 1;
1949                 for (i = 0; i != nd; ++i) {
1950                         memset(&list[ns].info, 0, sizeof(list[ns].info));
1951                         list[ns].max_port = 1;
1952                         list[ns].ibv_port = 1;
1953                         list[ns].ibv_dev = ibv_match[i];
1954                         list[ns].eth_dev = NULL;
1955                         list[ns].pci_dev = pci_dev;
1956                         list[ns].ifindex = 0;
1957                         if (nl_rdma >= 0)
1958                                 list[ns].ifindex = mlx5_nl_ifindex
1959                                         (nl_rdma, list[ns].ibv_dev->name, 1);
1960                         if (!list[ns].ifindex) {
1961                                 char ifname[IF_NAMESIZE];
1962
1963                                 /*
1964                                  * Netlink failed, it may happen with old
1965                                  * ib_core kernel driver (before 4.16).
1966                                  * We can assume there is old driver because
1967                                  * here we are processing single ports IB
1968                                  * devices. Let's try sysfs to retrieve
1969                                  * the ifindex. The method works for
1970                                  * master device only.
1971                                  */
1972                                 if (nd > 1) {
1973                                         /*
1974                                          * Multiple devices found, assume
1975                                          * representors, can not distinguish
1976                                          * master/representor and retrieve
1977                                          * ifindex via sysfs.
1978                                          */
1979                                         continue;
1980                                 }
1981                                 ret = mlx5_get_master_ifname
1982                                         (ibv_match[i]->ibdev_path, &ifname);
1983                                 if (!ret)
1984                                         list[ns].ifindex =
1985                                                 if_nametoindex(ifname);
1986                                 if (!list[ns].ifindex) {
1987                                         /*
1988                                          * No network interface index found
1989                                          * for the specified device, it means
1990                                          * there it is neither representor
1991                                          * nor master.
1992                                          */
1993                                         continue;
1994                                 }
1995                         }
1996                         ret = -1;
1997                         if (nl_route >= 0)
1998                                 ret = mlx5_nl_switch_info
1999                                                (nl_route,
2000                                                 list[ns].ifindex,
2001                                                 &list[ns].info);
2002                         if (ret || (!list[ns].info.representor &&
2003                                     !list[ns].info.master)) {
2004                                 /*
2005                                  * We failed to recognize representors with
2006                                  * Netlink, let's try to perform the task
2007                                  * with sysfs.
2008                                  */
2009                                 ret =  mlx5_sysfs_switch_info
2010                                                 (list[ns].ifindex,
2011                                                  &list[ns].info);
2012                         }
2013                         if (!ret && (list[ns].info.representor ^
2014                                      list[ns].info.master)) {
2015                                 ns++;
2016                         } else if ((nd == 1) &&
2017                                    !list[ns].info.representor &&
2018                                    !list[ns].info.master) {
2019                                 /*
2020                                  * Single IB device with
2021                                  * one physical port and
2022                                  * attached network device.
2023                                  * May be SRIOV is not enabled
2024                                  * or there is no representors.
2025                                  */
2026                                 DRV_LOG(INFO, "no E-Switch support detected");
2027                                 ns++;
2028                                 break;
2029                         }
2030                 }
2031                 if (!ns) {
2032                         DRV_LOG(ERR,
2033                                 "unable to recognize master/representors"
2034                                 " on the multiple IB devices");
2035                         rte_errno = ENOENT;
2036                         ret = -rte_errno;
2037                         goto exit;
2038                 }
2039         }
2040         assert(ns);
2041         /*
2042          * Sort list to probe devices in natural order for users convenience
2043          * (i.e. master first, then representors from lowest to highest ID).
2044          */
2045         qsort(list, ns, sizeof(*list), mlx5_dev_spawn_data_cmp);
2046         /* Default configuration. */
2047         dev_config = (struct mlx5_dev_config){
2048                 .hw_padding = 0,
2049                 .mps = MLX5_ARG_UNSET,
2050                 .rx_vec_en = 1,
2051                 .txq_inline_max = MLX5_ARG_UNSET,
2052                 .txq_inline_min = MLX5_ARG_UNSET,
2053                 .txq_inline_mpw = MLX5_ARG_UNSET,
2054                 .txqs_inline = MLX5_ARG_UNSET,
2055                 .vf_nl_en = 1,
2056                 .mr_ext_memseg_en = 1,
2057                 .mprq = {
2058                         .enabled = 0, /* Disabled by default. */
2059                         .stride_num_n = MLX5_MPRQ_STRIDE_NUM_N,
2060                         .max_memcpy_len = MLX5_MPRQ_MEMCPY_DEFAULT_LEN,
2061                         .min_rxqs_num = MLX5_MPRQ_MIN_RXQS,
2062                 },
2063                 .dv_esw_en = 1,
2064         };
2065         /* Device specific configuration. */
2066         switch (pci_dev->id.device_id) {
2067         case PCI_DEVICE_ID_MELLANOX_CONNECTX4VF:
2068         case PCI_DEVICE_ID_MELLANOX_CONNECTX4LXVF:
2069         case PCI_DEVICE_ID_MELLANOX_CONNECTX5VF:
2070         case PCI_DEVICE_ID_MELLANOX_CONNECTX5EXVF:
2071                 dev_config.vf = 1;
2072                 break;
2073         default:
2074                 break;
2075         }
2076         for (i = 0; i != ns; ++i) {
2077                 uint32_t restore;
2078
2079                 list[i].eth_dev = mlx5_dev_spawn(&pci_dev->device,
2080                                                  &list[i],
2081                                                  dev_config);
2082                 if (!list[i].eth_dev) {
2083                         if (rte_errno != EBUSY && rte_errno != EEXIST)
2084                                 break;
2085                         /* Device is disabled or already spawned. Ignore it. */
2086                         continue;
2087                 }
2088                 restore = list[i].eth_dev->data->dev_flags;
2089                 rte_eth_copy_pci_info(list[i].eth_dev, pci_dev);
2090                 /* Restore non-PCI flags cleared by the above call. */
2091                 list[i].eth_dev->data->dev_flags |= restore;
2092                 rte_eth_dev_probing_finish(list[i].eth_dev);
2093         }
2094         if (i != ns) {
2095                 DRV_LOG(ERR,
2096                         "probe of PCI device " PCI_PRI_FMT " aborted after"
2097                         " encountering an error: %s",
2098                         pci_dev->addr.domain, pci_dev->addr.bus,
2099                         pci_dev->addr.devid, pci_dev->addr.function,
2100                         strerror(rte_errno));
2101                 ret = -rte_errno;
2102                 /* Roll back. */
2103                 while (i--) {
2104                         if (!list[i].eth_dev)
2105                                 continue;
2106                         mlx5_dev_close(list[i].eth_dev);
2107                         /* mac_addrs must not be freed because in dev_private */
2108                         list[i].eth_dev->data->mac_addrs = NULL;
2109                         claim_zero(rte_eth_dev_release_port(list[i].eth_dev));
2110                 }
2111                 /* Restore original error. */
2112                 rte_errno = -ret;
2113         } else {
2114                 ret = 0;
2115         }
2116 exit:
2117         /*
2118          * Do the routine cleanup:
2119          * - close opened Netlink sockets
2120          * - free the Infiniband device list
2121          */
2122         if (nl_rdma >= 0)
2123                 close(nl_rdma);
2124         if (nl_route >= 0)
2125                 close(nl_route);
2126         assert(ibv_list);
2127         mlx5_glue->free_device_list(ibv_list);
2128         return ret;
2129 }
2130
2131 /**
2132  * DPDK callback to remove a PCI device.
2133  *
2134  * This function removes all Ethernet devices belong to a given PCI device.
2135  *
2136  * @param[in] pci_dev
2137  *   Pointer to the PCI device.
2138  *
2139  * @return
2140  *   0 on success, the function cannot fail.
2141  */
2142 static int
2143 mlx5_pci_remove(struct rte_pci_device *pci_dev)
2144 {
2145         uint16_t port_id;
2146
2147         RTE_ETH_FOREACH_DEV_OF(port_id, &pci_dev->device)
2148                 rte_eth_dev_close(port_id);
2149         return 0;
2150 }
2151
2152 static const struct rte_pci_id mlx5_pci_id_map[] = {
2153         {
2154                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
2155                                PCI_DEVICE_ID_MELLANOX_CONNECTX4)
2156         },
2157         {
2158                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
2159                                PCI_DEVICE_ID_MELLANOX_CONNECTX4VF)
2160         },
2161         {
2162                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
2163                                PCI_DEVICE_ID_MELLANOX_CONNECTX4LX)
2164         },
2165         {
2166                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
2167                                PCI_DEVICE_ID_MELLANOX_CONNECTX4LXVF)
2168         },
2169         {
2170                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
2171                                PCI_DEVICE_ID_MELLANOX_CONNECTX5)
2172         },
2173         {
2174                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
2175                                PCI_DEVICE_ID_MELLANOX_CONNECTX5VF)
2176         },
2177         {
2178                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
2179                                PCI_DEVICE_ID_MELLANOX_CONNECTX5EX)
2180         },
2181         {
2182                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
2183                                PCI_DEVICE_ID_MELLANOX_CONNECTX5EXVF)
2184         },
2185         {
2186                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
2187                                PCI_DEVICE_ID_MELLANOX_CONNECTX5BF)
2188         },
2189         {
2190                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
2191                                PCI_DEVICE_ID_MELLANOX_CONNECTX5BFVF)
2192         },
2193         {
2194                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
2195                                 PCI_DEVICE_ID_MELLANOX_CONNECTX6)
2196         },
2197         {
2198                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
2199                                 PCI_DEVICE_ID_MELLANOX_CONNECTX6VF)
2200         },
2201         {
2202                 .vendor_id = 0
2203         }
2204 };
2205
2206 static struct rte_pci_driver mlx5_driver = {
2207         .driver = {
2208                 .name = MLX5_DRIVER_NAME
2209         },
2210         .id_table = mlx5_pci_id_map,
2211         .probe = mlx5_pci_probe,
2212         .remove = mlx5_pci_remove,
2213         .dma_map = mlx5_dma_map,
2214         .dma_unmap = mlx5_dma_unmap,
2215         .drv_flags = RTE_PCI_DRV_INTR_LSC | RTE_PCI_DRV_INTR_RMV |
2216                      RTE_PCI_DRV_PROBE_AGAIN,
2217 };
2218
2219 #ifdef RTE_IBVERBS_LINK_DLOPEN
2220
2221 /**
2222  * Suffix RTE_EAL_PMD_PATH with "-glue".
2223  *
2224  * This function performs a sanity check on RTE_EAL_PMD_PATH before
2225  * suffixing its last component.
2226  *
2227  * @param buf[out]
2228  *   Output buffer, should be large enough otherwise NULL is returned.
2229  * @param size
2230  *   Size of @p out.
2231  *
2232  * @return
2233  *   Pointer to @p buf or @p NULL in case suffix cannot be appended.
2234  */
2235 static char *
2236 mlx5_glue_path(char *buf, size_t size)
2237 {
2238         static const char *const bad[] = { "/", ".", "..", NULL };
2239         const char *path = RTE_EAL_PMD_PATH;
2240         size_t len = strlen(path);
2241         size_t off;
2242         int i;
2243
2244         while (len && path[len - 1] == '/')
2245                 --len;
2246         for (off = len; off && path[off - 1] != '/'; --off)
2247                 ;
2248         for (i = 0; bad[i]; ++i)
2249                 if (!strncmp(path + off, bad[i], (int)(len - off)))
2250                         goto error;
2251         i = snprintf(buf, size, "%.*s-glue", (int)len, path);
2252         if (i == -1 || (size_t)i >= size)
2253                 goto error;
2254         return buf;
2255 error:
2256         DRV_LOG(ERR,
2257                 "unable to append \"-glue\" to last component of"
2258                 " RTE_EAL_PMD_PATH (\"" RTE_EAL_PMD_PATH "\"),"
2259                 " please re-configure DPDK");
2260         return NULL;
2261 }
2262
2263 /**
2264  * Initialization routine for run-time dependency on rdma-core.
2265  */
2266 static int
2267 mlx5_glue_init(void)
2268 {
2269         char glue_path[sizeof(RTE_EAL_PMD_PATH) - 1 + sizeof("-glue")];
2270         const char *path[] = {
2271                 /*
2272                  * A basic security check is necessary before trusting
2273                  * MLX5_GLUE_PATH, which may override RTE_EAL_PMD_PATH.
2274                  */
2275                 (geteuid() == getuid() && getegid() == getgid() ?
2276                  getenv("MLX5_GLUE_PATH") : NULL),
2277                 /*
2278                  * When RTE_EAL_PMD_PATH is set, use its glue-suffixed
2279                  * variant, otherwise let dlopen() look up libraries on its
2280                  * own.
2281                  */
2282                 (*RTE_EAL_PMD_PATH ?
2283                  mlx5_glue_path(glue_path, sizeof(glue_path)) : ""),
2284         };
2285         unsigned int i = 0;
2286         void *handle = NULL;
2287         void **sym;
2288         const char *dlmsg;
2289
2290         while (!handle && i != RTE_DIM(path)) {
2291                 const char *end;
2292                 size_t len;
2293                 int ret;
2294
2295                 if (!path[i]) {
2296                         ++i;
2297                         continue;
2298                 }
2299                 end = strpbrk(path[i], ":;");
2300                 if (!end)
2301                         end = path[i] + strlen(path[i]);
2302                 len = end - path[i];
2303                 ret = 0;
2304                 do {
2305                         char name[ret + 1];
2306
2307                         ret = snprintf(name, sizeof(name), "%.*s%s" MLX5_GLUE,
2308                                        (int)len, path[i],
2309                                        (!len || *(end - 1) == '/') ? "" : "/");
2310                         if (ret == -1)
2311                                 break;
2312                         if (sizeof(name) != (size_t)ret + 1)
2313                                 continue;
2314                         DRV_LOG(DEBUG, "looking for rdma-core glue as \"%s\"",
2315                                 name);
2316                         handle = dlopen(name, RTLD_LAZY);
2317                         break;
2318                 } while (1);
2319                 path[i] = end + 1;
2320                 if (!*end)
2321                         ++i;
2322         }
2323         if (!handle) {
2324                 rte_errno = EINVAL;
2325                 dlmsg = dlerror();
2326                 if (dlmsg)
2327                         DRV_LOG(WARNING, "cannot load glue library: %s", dlmsg);
2328                 goto glue_error;
2329         }
2330         sym = dlsym(handle, "mlx5_glue");
2331         if (!sym || !*sym) {
2332                 rte_errno = EINVAL;
2333                 dlmsg = dlerror();
2334                 if (dlmsg)
2335                         DRV_LOG(ERR, "cannot resolve glue symbol: %s", dlmsg);
2336                 goto glue_error;
2337         }
2338         mlx5_glue = *sym;
2339         return 0;
2340 glue_error:
2341         if (handle)
2342                 dlclose(handle);
2343         DRV_LOG(WARNING,
2344                 "cannot initialize PMD due to missing run-time dependency on"
2345                 " rdma-core libraries (libibverbs, libmlx5)");
2346         return -rte_errno;
2347 }
2348
2349 #endif
2350
2351 /**
2352  * Driver initialization routine.
2353  */
2354 RTE_INIT(rte_mlx5_pmd_init)
2355 {
2356         /* Initialize driver log type. */
2357         mlx5_logtype = rte_log_register("pmd.net.mlx5");
2358         if (mlx5_logtype >= 0)
2359                 rte_log_set_level(mlx5_logtype, RTE_LOG_NOTICE);
2360
2361         /* Build the static tables for Verbs conversion. */
2362         mlx5_set_ptype_table();
2363         mlx5_set_cksum_table();
2364         mlx5_set_swp_types_table();
2365         /*
2366          * RDMAV_HUGEPAGES_SAFE tells ibv_fork_init() we intend to use
2367          * huge pages. Calling ibv_fork_init() during init allows
2368          * applications to use fork() safely for purposes other than
2369          * using this PMD, which is not supported in forked processes.
2370          */
2371         setenv("RDMAV_HUGEPAGES_SAFE", "1", 1);
2372         /* Match the size of Rx completion entry to the size of a cacheline. */
2373         if (RTE_CACHE_LINE_SIZE == 128)
2374                 setenv("MLX5_CQE_SIZE", "128", 0);
2375         /*
2376          * MLX5_DEVICE_FATAL_CLEANUP tells ibv_destroy functions to
2377          * cleanup all the Verbs resources even when the device was removed.
2378          */
2379         setenv("MLX5_DEVICE_FATAL_CLEANUP", "1", 1);
2380 #ifdef RTE_IBVERBS_LINK_DLOPEN
2381         if (mlx5_glue_init())
2382                 return;
2383         assert(mlx5_glue);
2384 #endif
2385 #ifndef NDEBUG
2386         /* Glue structure must not contain any NULL pointers. */
2387         {
2388                 unsigned int i;
2389
2390                 for (i = 0; i != sizeof(*mlx5_glue) / sizeof(void *); ++i)
2391                         assert(((const void *const *)mlx5_glue)[i]);
2392         }
2393 #endif
2394         if (strcmp(mlx5_glue->version, MLX5_GLUE_VERSION)) {
2395                 DRV_LOG(ERR,
2396                         "rdma-core glue \"%s\" mismatch: \"%s\" is required",
2397                         mlx5_glue->version, MLX5_GLUE_VERSION);
2398                 return;
2399         }
2400         mlx5_glue->fork_init();
2401         rte_pci_register(&mlx5_driver);
2402 }
2403
2404 RTE_PMD_EXPORT_NAME(net_mlx5, __COUNTER__);
2405 RTE_PMD_REGISTER_PCI_TABLE(net_mlx5, mlx5_pci_id_map);
2406 RTE_PMD_REGISTER_KMOD_DEP(net_mlx5, "* ib_uverbs & mlx5_core & mlx5_ib");