drivers/net/mlx4/mlx4.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright 2012 6WIND S.A.
   3  * Copyright 2012 Mellanox Technologies, Ltd
   4  */
   5
   6 /**
   7  * @file
   8  * mlx4 driver initialization.
   9  */
  10
  11 #include <assert.h>
  12 #include <dlfcn.h>
  13 #include <errno.h>
  14 #include <inttypes.h>
  15 #include <stddef.h>
  16 #include <stdint.h>
  17 #include <stdio.h>
  18 #include <stdlib.h>
  19 #include <string.h>
  20 #include <unistd.h>
  21
  22 /* Verbs headers do not support -pedantic. */
  23 #ifdef PEDANTIC
  24 #pragma GCC diagnostic ignored "-Wpedantic"
  25 #endif
  26 #include <infiniband/verbs.h>
  27 #ifdef PEDANTIC
  28 #pragma GCC diagnostic error "-Wpedantic"
  29 #endif
  30
  31 #include <rte_common.h>
  32 #include <rte_config.h>
  33 #include <rte_dev.h>
  34 #include <rte_errno.h>
  35 #include <rte_ethdev_driver.h>
  36 #include <rte_ethdev_pci.h>
  37 #include <rte_ether.h>
  38 #include <rte_flow.h>
  39 #include <rte_interrupts.h>
  40 #include <rte_kvargs.h>
  41 #include <rte_malloc.h>
  42 #include <rte_mbuf.h>
  43
  44 #include "mlx4.h"
  45 #include "mlx4_glue.h"
  46 #include "mlx4_flow.h"
  47 #include "mlx4_mr.h"
  48 #include "mlx4_rxtx.h"
  49 #include "mlx4_utils.h"
  50
  51 struct mlx4_dev_list mlx4_mem_event_cb_list =
  52         LIST_HEAD_INITIALIZER(mlx4_mem_event_cb_list);
  53
  54 rte_rwlock_t mlx4_mem_event_rwlock = RTE_RWLOCK_INITIALIZER;
  55
  56 /** Configuration structure for device arguments. */
  57 struct mlx4_conf {
  58         struct {
  59                 uint32_t present; /**< Bit-field for existing ports. */
  60                 uint32_t enabled; /**< Bit-field for user-enabled ports. */
  61         } ports;
  62 };
  63
  64 /* Available parameters list. */
  65 const char *pmd_mlx4_init_params[] = {
  66         MLX4_PMD_PORT_KVARG,
  67         NULL,
  68 };
  69
  70 static void mlx4_dev_stop(struct rte_eth_dev *dev);
  71
  72 /**
  73  * DPDK callback for Ethernet device configuration.
  74  *
  75  * @param dev
  76  *   Pointer to Ethernet device structure.
  77  *
  78  * @return
  79  *   0 on success, negative errno value otherwise and rte_errno is set.
  80  */
  81 static int
  82 mlx4_dev_configure(struct rte_eth_dev *dev)
  83 {
  84         struct priv *priv = dev->data->dev_private;
  85         struct rte_flow_error error;
  86         int ret;
  87
  88         /* Prepare internal flow rules. */
  89         ret = mlx4_flow_sync(priv, &error);
  90         if (ret) {
  91                 ERROR("cannot set up internal flow rules (code %d, \"%s\"),"
  92                       " flow error type %d, cause %p, message: %s",
  93                       -ret, strerror(-ret), error.type, error.cause,
  94                       error.message ? error.message : "(unspecified)");
  95                 goto exit;
  96         }
  97         ret = mlx4_intr_install(priv);
  98         if (ret)
  99                 ERROR("%p: interrupt handler installation failed",
 100                       (void *)dev);
 101 exit:
 102         return ret;
 103 }
 104
 105 /**
 106  * DPDK callback to start the device.
 107  *
 108  * Simulate device start by initializing common RSS resources and attaching
 109  * all configured flows.
 110  *
 111  * @param dev
 112  *   Pointer to Ethernet device structure.
 113  *
 114  * @return
 115  *   0 on success, negative errno value otherwise and rte_errno is set.
 116  */
 117 static int
 118 mlx4_dev_start(struct rte_eth_dev *dev)
 119 {
 120         struct priv *priv = dev->data->dev_private;
 121         struct rte_flow_error error;
 122         int ret;
 123
 124         if (priv->started)
 125                 return 0;
 126         DEBUG("%p: attaching configured flows to all RX queues", (void *)dev);
 127         priv->started = 1;
 128         ret = mlx4_rss_init(priv);
 129         if (ret) {
 130                 ERROR("%p: cannot initialize RSS resources: %s",
 131                       (void *)dev, strerror(-ret));
 132                 goto err;
 133         }
 134 #ifndef NDEBUG
 135         mlx4_mr_dump_dev(dev);
 136 #endif
 137         ret = mlx4_rxq_intr_enable(priv);
 138         if (ret) {
 139                 ERROR("%p: interrupt handler installation failed",
 140                      (void *)dev);
 141                 goto err;
 142         }
 143         ret = mlx4_flow_sync(priv, &error);
 144         if (ret) {
 145                 ERROR("%p: cannot attach flow rules (code %d, \"%s\"),"
 146                       " flow error type %d, cause %p, message: %s",
 147                       (void *)dev,
 148                       -ret, strerror(-ret), error.type, error.cause,
 149                       error.message ? error.message : "(unspecified)");
 150                 goto err;
 151         }
 152         rte_wmb();
 153         dev->tx_pkt_burst = mlx4_tx_burst;
 154         dev->rx_pkt_burst = mlx4_rx_burst;
 155         return 0;
 156 err:
 157         mlx4_dev_stop(dev);
 158         return ret;
 159 }
 160
 161 /**
 162  * DPDK callback to stop the device.
 163  *
 164  * Simulate device stop by detaching all configured flows.
 165  *
 166  * @param dev
 167  *   Pointer to Ethernet device structure.
 168  */
 169 static void
 170 mlx4_dev_stop(struct rte_eth_dev *dev)
 171 {
 172         struct priv *priv = dev->data->dev_private;
 173
 174         if (!priv->started)
 175                 return;
 176         DEBUG("%p: detaching flows from all RX queues", (void *)dev);
 177         priv->started = 0;
 178         dev->tx_pkt_burst = mlx4_tx_burst_removed;
 179         dev->rx_pkt_burst = mlx4_rx_burst_removed;
 180         rte_wmb();
 181         mlx4_flow_sync(priv, NULL);
 182         mlx4_rxq_intr_disable(priv);
 183         mlx4_rss_deinit(priv);
 184 }
 185
 186 /**
 187  * DPDK callback to close the device.
 188  *
 189  * Destroy all queues and objects, free memory.
 190  *
 191  * @param dev
 192  *   Pointer to Ethernet device structure.
 193  */
 194 static void
 195 mlx4_dev_close(struct rte_eth_dev *dev)
 196 {
 197         struct priv *priv = dev->data->dev_private;
 198         unsigned int i;
 199
 200         DEBUG("%p: closing device \"%s\"",
 201               (void *)dev,
 202               ((priv->ctx != NULL) ? priv->ctx->device->name : ""));
 203         dev->rx_pkt_burst = mlx4_rx_burst_removed;
 204         dev->tx_pkt_burst = mlx4_tx_burst_removed;
 205         rte_wmb();
 206         mlx4_flow_clean(priv);
 207         mlx4_rss_deinit(priv);
 208         for (i = 0; i != dev->data->nb_rx_queues; ++i)
 209                 mlx4_rx_queue_release(dev->data->rx_queues[i]);
 210         for (i = 0; i != dev->data->nb_tx_queues; ++i)
 211                 mlx4_tx_queue_release(dev->data->tx_queues[i]);
 212         mlx4_mr_release(dev);
 213         if (priv->pd != NULL) {
 214                 assert(priv->ctx != NULL);
 215                 claim_zero(mlx4_glue->dealloc_pd(priv->pd));
 216                 claim_zero(mlx4_glue->close_device(priv->ctx));
 217         } else
 218                 assert(priv->ctx == NULL);
 219         mlx4_intr_uninstall(priv);
 220         memset(priv, 0, sizeof(*priv));
 221 }
 222
 223 static const struct eth_dev_ops mlx4_dev_ops = {
 224         .dev_configure = mlx4_dev_configure,
 225         .dev_start = mlx4_dev_start,
 226         .dev_stop = mlx4_dev_stop,
 227         .dev_set_link_down = mlx4_dev_set_link_down,
 228         .dev_set_link_up = mlx4_dev_set_link_up,
 229         .dev_close = mlx4_dev_close,
 230         .link_update = mlx4_link_update,
 231         .promiscuous_enable = mlx4_promiscuous_enable,
 232         .promiscuous_disable = mlx4_promiscuous_disable,
 233         .allmulticast_enable = mlx4_allmulticast_enable,
 234         .allmulticast_disable = mlx4_allmulticast_disable,
 235         .mac_addr_remove = mlx4_mac_addr_remove,
 236         .mac_addr_add = mlx4_mac_addr_add,
 237         .mac_addr_set = mlx4_mac_addr_set,
 238         .stats_get = mlx4_stats_get,
 239         .stats_reset = mlx4_stats_reset,
 240         .dev_infos_get = mlx4_dev_infos_get,
 241         .dev_supported_ptypes_get = mlx4_dev_supported_ptypes_get,
 242         .vlan_filter_set = mlx4_vlan_filter_set,
 243         .rx_queue_setup = mlx4_rx_queue_setup,
 244         .tx_queue_setup = mlx4_tx_queue_setup,
 245         .rx_queue_release = mlx4_rx_queue_release,
 246         .tx_queue_release = mlx4_tx_queue_release,
 247         .flow_ctrl_get = mlx4_flow_ctrl_get,
 248         .flow_ctrl_set = mlx4_flow_ctrl_set,
 249         .mtu_set = mlx4_mtu_set,
 250         .filter_ctrl = mlx4_filter_ctrl,
 251         .rx_queue_intr_enable = mlx4_rx_intr_enable,
 252         .rx_queue_intr_disable = mlx4_rx_intr_disable,
 253         .is_removed = mlx4_is_removed,
 254 };
 255
 256 /**
 257  * Get PCI information from struct ibv_device.
 258  *
 259  * @param device
 260  *   Pointer to Ethernet device structure.
 261  * @param[out] pci_addr
 262  *   PCI bus address output buffer.
 263  *
 264  * @return
 265  *   0 on success, negative errno value otherwise and rte_errno is set.
 266  */
 267 static int
 268 mlx4_ibv_device_to_pci_addr(const struct ibv_device *device,
 269                             struct rte_pci_addr *pci_addr)
 270 {
 271         FILE *file;
 272         char line[32];
 273         MKSTR(path, "%s/device/uevent", device->ibdev_path);
 274
 275         file = fopen(path, "rb");
 276         if (file == NULL) {
 277                 rte_errno = errno;
 278                 return -rte_errno;
 279         }
 280         while (fgets(line, sizeof(line), file) == line) {
 281                 size_t len = strlen(line);
 282                 int ret;
 283
 284                 /* Truncate long lines. */
 285                 if (len == (sizeof(line) - 1))
 286                         while (line[(len - 1)] != '\n') {
 287                                 ret = fgetc(file);
 288                                 if (ret == EOF)
 289                                         break;
 290                                 line[(len - 1)] = ret;
 291                         }
 292                 /* Extract information. */
 293                 if (sscanf(line,
 294                            "PCI_SLOT_NAME="
 295                            "%" SCNx32 ":%" SCNx8 ":%" SCNx8 ".%" SCNx8 "\n",
 296                            &pci_addr->domain,
 297                            &pci_addr->bus,
 298                            &pci_addr->devid,
 299                            &pci_addr->function) == 4) {
 300                         ret = 0;
 301                         break;
 302                 }
 303         }
 304         fclose(file);
 305         return 0;
 306 }
 307
 308 /**
 309  * Verify and store value for device argument.
 310  *
 311  * @param[in] key
 312  *   Key argument to verify.
 313  * @param[in] val
 314  *   Value associated with key.
 315  * @param[in, out] conf
 316  *   Shared configuration data.
 317  *
 318  * @return
 319  *   0 on success, negative errno value otherwise and rte_errno is set.
 320  */
 321 static int
 322 mlx4_arg_parse(const char *key, const char *val, struct mlx4_conf *conf)
 323 {
 324         unsigned long tmp;
 325
 326         errno = 0;
 327         tmp = strtoul(val, NULL, 0);
 328         if (errno) {
 329                 rte_errno = errno;
 330                 WARN("%s: \"%s\" is not a valid integer", key, val);
 331                 return -rte_errno;
 332         }
 333         if (strcmp(MLX4_PMD_PORT_KVARG, key) == 0) {
 334                 uint32_t ports = rte_log2_u32(conf->ports.present + 1);
 335
 336                 if (tmp >= ports) {
 337                         ERROR("port index %lu outside range [0,%" PRIu32 ")",
 338                               tmp, ports);
 339                         return -EINVAL;
 340                 }
 341                 if (!(conf->ports.present & (1 << tmp))) {
 342                         rte_errno = EINVAL;
 343                         ERROR("invalid port index %lu", tmp);
 344                         return -rte_errno;
 345                 }
 346                 conf->ports.enabled |= 1 << tmp;
 347         } else {
 348                 rte_errno = EINVAL;
 349                 WARN("%s: unknown parameter", key);
 350                 return -rte_errno;
 351         }
 352         return 0;
 353 }
 354
 355 /**
 356  * Parse device parameters.
 357  *
 358  * @param devargs
 359  *   Device arguments structure.
 360  *
 361  * @return
 362  *   0 on success, negative errno value otherwise and rte_errno is set.
 363  */
 364 static int
 365 mlx4_args(struct rte_devargs *devargs, struct mlx4_conf *conf)
 366 {
 367         struct rte_kvargs *kvlist;
 368         unsigned int arg_count;
 369         int ret = 0;
 370         int i;
 371
 372         if (devargs == NULL)
 373                 return 0;
 374         kvlist = rte_kvargs_parse(devargs->args, pmd_mlx4_init_params);
 375         if (kvlist == NULL) {
 376                 rte_errno = EINVAL;
 377                 ERROR("failed to parse kvargs");
 378                 return -rte_errno;
 379         }
 380         /* Process parameters. */
 381         for (i = 0; pmd_mlx4_init_params[i]; ++i) {
 382                 arg_count = rte_kvargs_count(kvlist, MLX4_PMD_PORT_KVARG);
 383                 while (arg_count-- > 0) {
 384                         ret = rte_kvargs_process(kvlist,
 385                                                  MLX4_PMD_PORT_KVARG,
 386                                                  (int (*)(const char *,
 387                                                           const char *,
 388                                                           void *))
 389                                                  mlx4_arg_parse,
 390                                                  conf);
 391                         if (ret != 0)
 392                                 goto free_kvlist;
 393                 }
 394         }
 395 free_kvlist:
 396         rte_kvargs_free(kvlist);
 397         return ret;
 398 }
 399
 400 /**
 401  * Interpret RSS capabilities reported by device.
 402  *
 403  * This function returns the set of usable Verbs RSS hash fields, kernel
 404  * quirks taken into account.
 405  *
 406  * @param ctx
 407  *   Verbs context.
 408  * @param pd
 409  *   Verbs protection domain.
 410  * @param device_attr_ex
 411  *   Extended device attributes to interpret.
 412  *
 413  * @return
 414  *   Usable RSS hash fields mask in Verbs format.
 415  */
 416 static uint64_t
 417 mlx4_hw_rss_sup(struct ibv_context *ctx, struct ibv_pd *pd,
 418                 struct ibv_device_attr_ex *device_attr_ex)
 419 {
 420         uint64_t hw_rss_sup = device_attr_ex->rss_caps.rx_hash_fields_mask;
 421         struct ibv_cq *cq = NULL;
 422         struct ibv_wq *wq = NULL;
 423         struct ibv_rwq_ind_table *ind = NULL;
 424         struct ibv_qp *qp = NULL;
 425
 426         if (!hw_rss_sup) {
 427                 WARN("no RSS capabilities reported; disabling support for UDP"
 428                      " RSS and inner VXLAN RSS");
 429                 return IBV_RX_HASH_SRC_IPV4 | IBV_RX_HASH_DST_IPV4 |
 430                         IBV_RX_HASH_SRC_IPV6 | IBV_RX_HASH_DST_IPV6 |
 431                         IBV_RX_HASH_SRC_PORT_TCP | IBV_RX_HASH_DST_PORT_TCP;
 432         }
 433         if (!(hw_rss_sup & IBV_RX_HASH_INNER))
 434                 return hw_rss_sup;
 435         /*
 436          * Although reported as supported, missing code in some Linux
 437          * versions (v4.15, v4.16) prevents the creation of hash QPs with
 438          * inner capability.
 439          *
 440          * There is no choice but to attempt to instantiate a temporary RSS
 441          * context in order to confirm its support.
 442          */
 443         cq = mlx4_glue->create_cq(ctx, 1, NULL, NULL, 0);
 444         wq = cq ? mlx4_glue->create_wq
 445                 (ctx,
 446                  &(struct ibv_wq_init_attr){
 447                         .wq_type = IBV_WQT_RQ,
 448                         .max_wr = 1,
 449                         .max_sge = 1,
 450                         .pd = pd,
 451                         .cq = cq,
 452                  }) : NULL;
 453         ind = wq ? mlx4_glue->create_rwq_ind_table
 454                 (ctx,
 455                  &(struct ibv_rwq_ind_table_init_attr){
 456                         .log_ind_tbl_size = 0,
 457                         .ind_tbl = &wq,
 458                         .comp_mask = 0,
 459                  }) : NULL;
 460         qp = ind ? mlx4_glue->create_qp_ex
 461                 (ctx,
 462                  &(struct ibv_qp_init_attr_ex){
 463                         .comp_mask =
 464                                 (IBV_QP_INIT_ATTR_PD |
 465                                  IBV_QP_INIT_ATTR_RX_HASH |
 466                                  IBV_QP_INIT_ATTR_IND_TABLE),
 467                         .qp_type = IBV_QPT_RAW_PACKET,
 468                         .pd = pd,
 469                         .rwq_ind_tbl = ind,
 470                         .rx_hash_conf = {
 471                                 .rx_hash_function = IBV_RX_HASH_FUNC_TOEPLITZ,
 472                                 .rx_hash_key_len = MLX4_RSS_HASH_KEY_SIZE,
 473                                 .rx_hash_key = mlx4_rss_hash_key_default,
 474                                 .rx_hash_fields_mask = hw_rss_sup,
 475                         },
 476                  }) : NULL;
 477         if (!qp) {
 478                 WARN("disabling unusable inner RSS capability due to kernel"
 479                      " quirk");
 480                 hw_rss_sup &= ~IBV_RX_HASH_INNER;
 481         } else {
 482                 claim_zero(mlx4_glue->destroy_qp(qp));
 483         }
 484         if (ind)
 485                 claim_zero(mlx4_glue->destroy_rwq_ind_table(ind));
 486         if (wq)
 487                 claim_zero(mlx4_glue->destroy_wq(wq));
 488         if (cq)
 489                 claim_zero(mlx4_glue->destroy_cq(cq));
 490         return hw_rss_sup;
 491 }
 492
 493 static struct rte_pci_driver mlx4_driver;
 494
 495 /**
 496  * DPDK callback to register a PCI device.
 497  *
 498  * This function creates an Ethernet device for each port of a given
 499  * PCI device.
 500  *
 501  * @param[in] pci_drv
 502  *   PCI driver structure (mlx4_driver).
 503  * @param[in] pci_dev
 504  *   PCI device information.
 505  *
 506  * @return
 507  *   0 on success, negative errno value otherwise and rte_errno is set.
 508  */
 509 static int
 510 mlx4_pci_probe(struct rte_pci_driver *pci_drv, struct rte_pci_device *pci_dev)
 511 {
 512         struct ibv_device **list;
 513         struct ibv_device *ibv_dev;
 514         int err = 0;
 515         struct ibv_context *attr_ctx = NULL;
 516         struct ibv_device_attr device_attr;
 517         struct ibv_device_attr_ex device_attr_ex;
 518         struct mlx4_conf conf = {
 519                 .ports.present = 0,
 520         };
 521         unsigned int vf;
 522         int i;
 523
 524         (void)pci_drv;
 525         assert(pci_drv == &mlx4_driver);
 526         list = mlx4_glue->get_device_list(&i);
 527         if (list == NULL) {
 528                 rte_errno = errno;
 529                 assert(rte_errno);
 530                 if (rte_errno == ENOSYS)
 531                         ERROR("cannot list devices, is ib_uverbs loaded?");
 532                 return -rte_errno;
 533         }
 534         assert(i >= 0);
 535         /*
 536          * For each listed device, check related sysfs entry against
 537          * the provided PCI ID.
 538          */
 539         while (i != 0) {
 540                 struct rte_pci_addr pci_addr;
 541
 542                 --i;
 543                 DEBUG("checking device \"%s\"", list[i]->name);
 544                 if (mlx4_ibv_device_to_pci_addr(list[i], &pci_addr))
 545                         continue;
 546                 if ((pci_dev->addr.domain != pci_addr.domain) ||
 547                     (pci_dev->addr.bus != pci_addr.bus) ||
 548                     (pci_dev->addr.devid != pci_addr.devid) ||
 549                     (pci_dev->addr.function != pci_addr.function))
 550                         continue;
 551                 vf = (pci_dev->id.device_id ==
 552                       PCI_DEVICE_ID_MELLANOX_CONNECTX3VF);
 553                 INFO("PCI information matches, using device \"%s\" (VF: %s)",
 554                      list[i]->name, (vf ? "true" : "false"));
 555                 attr_ctx = mlx4_glue->open_device(list[i]);
 556                 err = errno;
 557                 break;
 558         }
 559         if (attr_ctx == NULL) {
 560                 mlx4_glue->free_device_list(list);
 561                 switch (err) {
 562                 case 0:
 563                         rte_errno = ENODEV;
 564                         ERROR("cannot access device, is mlx4_ib loaded?");
 565                         return -rte_errno;
 566                 case EINVAL:
 567                         rte_errno = EINVAL;
 568                         ERROR("cannot use device, are drivers up to date?");
 569                         return -rte_errno;
 570                 }
 571                 assert(err > 0);
 572                 rte_errno = err;
 573                 return -rte_errno;
 574         }
 575         ibv_dev = list[i];
 576         DEBUG("device opened");
 577         if (mlx4_glue->query_device(attr_ctx, &device_attr)) {
 578                 err = ENODEV;
 579                 goto error;
 580         }
 581         INFO("%u port(s) detected", device_attr.phys_port_cnt);
 582         conf.ports.present |= (UINT64_C(1) << device_attr.phys_port_cnt) - 1;
 583         if (mlx4_args(pci_dev->device.devargs, &conf)) {
 584                 ERROR("failed to process device arguments");
 585                 err = EINVAL;
 586                 goto error;
 587         }
 588         /* Use all ports when none are defined */
 589         if (!conf.ports.enabled)
 590                 conf.ports.enabled = conf.ports.present;
 591         /* Retrieve extended device attributes. */
 592         if (mlx4_glue->query_device_ex(attr_ctx, NULL, &device_attr_ex)) {
 593                 err = ENODEV;
 594                 goto error;
 595         }
 596         assert(device_attr.max_sge >= MLX4_MAX_SGE);
 597         for (i = 0; i < device_attr.phys_port_cnt; i++) {
 598                 uint32_t port = i + 1; /* ports are indexed from one */
 599                 struct ibv_context *ctx = NULL;
 600                 struct ibv_port_attr port_attr;
 601                 struct ibv_pd *pd = NULL;
 602                 struct priv *priv = NULL;
 603                 struct rte_eth_dev *eth_dev = NULL;
 604                 struct ether_addr mac;
 605
 606                 /* If port is not enabled, skip. */
 607                 if (!(conf.ports.enabled & (1 << i)))
 608                         continue;
 609                 DEBUG("using port %u", port);
 610                 ctx = mlx4_glue->open_device(ibv_dev);
 611                 if (ctx == NULL) {
 612                         err = ENODEV;
 613                         goto port_error;
 614                 }
 615                 /* Check port status. */
 616                 err = mlx4_glue->query_port(ctx, port, &port_attr);
 617                 if (err) {
 618                         err = ENODEV;
 619                         ERROR("port query failed: %s", strerror(err));
 620                         goto port_error;
 621                 }
 622                 if (port_attr.link_layer != IBV_LINK_LAYER_ETHERNET) {
 623                         err = ENOTSUP;
 624                         ERROR("port %d is not configured in Ethernet mode",
 625                               port);
 626                         goto port_error;
 627                 }
 628                 if (port_attr.state != IBV_PORT_ACTIVE)
 629                         DEBUG("port %d is not active: \"%s\" (%d)",
 630                               port, mlx4_glue->port_state_str(port_attr.state),
 631                               port_attr.state);
 632                 /* Make asynchronous FD non-blocking to handle interrupts. */
 633                 err = mlx4_fd_set_non_blocking(ctx->async_fd);
 634                 if (err) {
 635                         ERROR("cannot make asynchronous FD non-blocking: %s",
 636                               strerror(err));
 637                         goto port_error;
 638                 }
 639                 /* Allocate protection domain. */
 640                 pd = mlx4_glue->alloc_pd(ctx);
 641                 if (pd == NULL) {
 642                         err = ENOMEM;
 643                         ERROR("PD allocation failure");
 644                         goto port_error;
 645                 }
 646                 /* from rte_ethdev.c */
 647                 priv = rte_zmalloc("ethdev private structure",
 648                                    sizeof(*priv),
 649                                    RTE_CACHE_LINE_SIZE);
 650                 if (priv == NULL) {
 651                         err = ENOMEM;
 652                         ERROR("priv allocation failure");
 653                         goto port_error;
 654                 }
 655                 priv->ctx = ctx;
 656                 priv->device_attr = device_attr;
 657                 priv->port = port;
 658                 priv->pd = pd;
 659                 priv->mtu = ETHER_MTU;
 660                 priv->vf = vf;
 661                 priv->hw_csum = !!(device_attr.device_cap_flags &
 662                                    IBV_DEVICE_RAW_IP_CSUM);
 663                 DEBUG("checksum offloading is %ssupported",
 664                       (priv->hw_csum ? "" : "not "));
 665                 /* Only ConnectX-3 Pro supports tunneling. */
 666                 priv->hw_csum_l2tun =
 667                         priv->hw_csum &&
 668                         (device_attr.vendor_part_id ==
 669                          PCI_DEVICE_ID_MELLANOX_CONNECTX3PRO);
 670                 DEBUG("L2 tunnel checksum offloads are %ssupported",
 671                       priv->hw_csum_l2tun ? "" : "not ");
 672                 priv->hw_rss_sup = mlx4_hw_rss_sup(priv->ctx, priv->pd,
 673                                                    &device_attr_ex);
 674                 DEBUG("supported RSS hash fields mask: %016" PRIx64,
 675                       priv->hw_rss_sup);
 676                 priv->hw_rss_max_qps =
 677                         device_attr_ex.rss_caps.max_rwq_indirection_table_size;
 678                 DEBUG("MAX RSS queues %d", priv->hw_rss_max_qps);
 679                 priv->hw_fcs_strip = !!(device_attr_ex.raw_packet_caps &
 680                                         IBV_RAW_PACKET_CAP_SCATTER_FCS);
 681                 DEBUG("FCS stripping toggling is %ssupported",
 682                       priv->hw_fcs_strip ? "" : "not ");
 683                 priv->tso =
 684                         ((device_attr_ex.tso_caps.max_tso > 0) &&
 685                          (device_attr_ex.tso_caps.supported_qpts &
 686                           (1 << IBV_QPT_RAW_PACKET)));
 687                 if (priv->tso)
 688                         priv->tso_max_payload_sz =
 689                                         device_attr_ex.tso_caps.max_tso;
 690                 DEBUG("TSO is %ssupported",
 691                       priv->tso ? "" : "not ");
 692                 /* Configure the first MAC address by default. */
 693                 err = mlx4_get_mac(priv, &mac.addr_bytes);
 694                 if (err) {
 695                         ERROR("cannot get MAC address, is mlx4_en loaded?"
 696                               " (error: %s)", strerror(err));
 697                         goto port_error;
 698                 }
 699                 INFO("port %u MAC address is %02x:%02x:%02x:%02x:%02x:%02x",
 700                      priv->port,
 701                      mac.addr_bytes[0], mac.addr_bytes[1],
 702                      mac.addr_bytes[2], mac.addr_bytes[3],
 703                      mac.addr_bytes[4], mac.addr_bytes[5]);
 704                 /* Register MAC address. */
 705                 priv->mac[0] = mac;
 706 #ifndef NDEBUG
 707                 {
 708                         char ifname[IF_NAMESIZE];
 709
 710                         if (mlx4_get_ifname(priv, &ifname) == 0)
 711                                 DEBUG("port %u ifname is \"%s\"",
 712                                       priv->port, ifname);
 713                         else
 714                                 DEBUG("port %u ifname is unknown", priv->port);
 715                 }
 716 #endif
 717                 /* Get actual MTU if possible. */
 718                 mlx4_mtu_get(priv, &priv->mtu);
 719                 DEBUG("port %u MTU is %u", priv->port, priv->mtu);
 720                 /* from rte_ethdev.c */
 721                 {
 722                         char name[RTE_ETH_NAME_MAX_LEN];
 723
 724                         snprintf(name, sizeof(name), "%s port %u",
 725                                  mlx4_glue->get_device_name(ibv_dev), port);
 726                         eth_dev = rte_eth_dev_allocate(name);
 727                 }
 728                 if (eth_dev == NULL) {
 729                         err = ENOMEM;
 730                         ERROR("can not allocate rte ethdev");
 731                         goto port_error;
 732                 }
 733                 eth_dev->data->dev_private = priv;
 734                 eth_dev->data->mac_addrs = priv->mac;
 735                 eth_dev->device = &pci_dev->device;
 736                 rte_eth_copy_pci_info(eth_dev, pci_dev);
 737                 /* Initialize local interrupt handle for current port. */
 738                 priv->intr_handle = (struct rte_intr_handle){
 739                         .fd = -1,
 740                         .type = RTE_INTR_HANDLE_EXT,
 741                 };
 742                 /*
 743                  * Override ethdev interrupt handle pointer with private
 744                  * handle instead of that of the parent PCI device used by
 745                  * default. This prevents it from being shared between all
 746                  * ports of the same PCI device since each of them is
 747                  * associated its own Verbs context.
 748                  *
 749                  * Rx interrupts in particular require this as the PMD has
 750                  * no control over the registration of queue interrupts
 751                  * besides setting up eth_dev->intr_handle, the rest is
 752                  * handled by rte_intr_rx_ctl().
 753                  */
 754                 eth_dev->intr_handle = &priv->intr_handle;
 755                 priv->dev = eth_dev;
 756                 eth_dev->dev_ops = &mlx4_dev_ops;
 757                 /* Bring Ethernet device up. */
 758                 DEBUG("forcing Ethernet interface up");
 759                 mlx4_dev_set_link_up(priv->dev);
 760                 /* Update link status once if waiting for LSC. */
 761                 if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
 762                         mlx4_link_update(eth_dev, 0);
 763                 /*
 764                  * Once the device is added to the list of memory event
 765                  * callback, its global MR cache table cannot be expanded
 766                  * on the fly because of deadlock. If it overflows, lookup
 767                  * should be done by searching MR list linearly, which is slow.
 768                  */
 769                 err = mlx4_mr_btree_init(&priv->mr.cache,
 770                                          MLX4_MR_BTREE_CACHE_N * 2,
 771                                          eth_dev->device->numa_node);
 772                 if (err) {
 773                         /* rte_errno is already set. */
 774                         goto port_error;
 775                 }
 776                 /* Add device to memory callback list. */
 777                 rte_rwlock_write_lock(&mlx4_mem_event_rwlock);
 778                 LIST_INSERT_HEAD(&mlx4_mem_event_cb_list, priv, mem_event_cb);
 779                 rte_rwlock_write_unlock(&mlx4_mem_event_rwlock);
 780                 rte_eth_dev_probing_finish(eth_dev);
 781                 continue;
 782 port_error:
 783                 rte_free(priv);
 784                 if (eth_dev != NULL)
 785                         eth_dev->data->dev_private = NULL;
 786                 if (pd)
 787                         claim_zero(mlx4_glue->dealloc_pd(pd));
 788                 if (ctx)
 789                         claim_zero(mlx4_glue->close_device(ctx));
 790                 if (eth_dev != NULL) {
 791                         /* mac_addrs must not be freed because part of dev_private */
 792                         eth_dev->data->mac_addrs = NULL;
 793                         rte_eth_dev_release_port(eth_dev);
 794                 }
 795                 break;
 796         }
 797         /*
 798          * XXX if something went wrong in the loop above, there is a resource
 799          * leak (ctx, pd, priv, dpdk ethdev) but we can do nothing about it as
 800          * long as the dpdk does not provide a way to deallocate a ethdev and a
 801          * way to enumerate the registered ethdevs to free the previous ones.
 802          */
 803 error:
 804         if (attr_ctx)
 805                 claim_zero(mlx4_glue->close_device(attr_ctx));
 806         if (list)
 807                 mlx4_glue->free_device_list(list);
 808         if (err)
 809                 rte_errno = err;
 810         return -err;
 811 }
 812
 813 static const struct rte_pci_id mlx4_pci_id_map[] = {
 814         {
 815                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
 816                                PCI_DEVICE_ID_MELLANOX_CONNECTX3)
 817         },
 818         {
 819                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
 820                                PCI_DEVICE_ID_MELLANOX_CONNECTX3PRO)
 821         },
 822         {
 823                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
 824                                PCI_DEVICE_ID_MELLANOX_CONNECTX3VF)
 825         },
 826         {
 827                 .vendor_id = 0
 828         }
 829 };
 830
 831 static struct rte_pci_driver mlx4_driver = {
 832         .driver = {
 833                 .name = MLX4_DRIVER_NAME
 834         },
 835         .id_table = mlx4_pci_id_map,
 836         .probe = mlx4_pci_probe,
 837         .drv_flags = RTE_PCI_DRV_INTR_LSC |
 838                      RTE_PCI_DRV_INTR_RMV,
 839 };
 840
 841 #ifdef RTE_LIBRTE_MLX4_DLOPEN_DEPS
 842
 843 /**
 844  * Suffix RTE_EAL_PMD_PATH with "-glue".
 845  *
 846  * This function performs a sanity check on RTE_EAL_PMD_PATH before
 847  * suffixing its last component.
 848  *
 849  * @param buf[out]
 850  *   Output buffer, should be large enough otherwise NULL is returned.
 851  * @param size
 852  *   Size of @p out.
 853  *
 854  * @return
 855  *   Pointer to @p buf or @p NULL in case suffix cannot be appended.
 856  */
 857 static char *
 858 mlx4_glue_path(char *buf, size_t size)
 859 {
 860         static const char *const bad[] = { "/", ".", "..", NULL };
 861         const char *path = RTE_EAL_PMD_PATH;
 862         size_t len = strlen(path);
 863         size_t off;
 864         int i;
 865
 866         while (len && path[len - 1] == '/')
 867                 --len;
 868         for (off = len; off && path[off - 1] != '/'; --off)
 869                 ;
 870         for (i = 0; bad[i]; ++i)
 871                 if (!strncmp(path + off, bad[i], (int)(len - off)))
 872                         goto error;
 873         i = snprintf(buf, size, "%.*s-glue", (int)len, path);
 874         if (i == -1 || (size_t)i >= size)
 875                 goto error;
 876         return buf;
 877 error:
 878         ERROR("unable to append \"-glue\" to last component of"
 879               " RTE_EAL_PMD_PATH (\"" RTE_EAL_PMD_PATH "\"),"
 880               " please re-configure DPDK");
 881         return NULL;
 882 }
 883
 884 /**
 885  * Initialization routine for run-time dependency on rdma-core.
 886  */
 887 static int
 888 mlx4_glue_init(void)
 889 {
 890         char glue_path[sizeof(RTE_EAL_PMD_PATH) - 1 + sizeof("-glue")];
 891         const char *path[] = {
 892                 /*
 893                  * A basic security check is necessary before trusting
 894                  * MLX4_GLUE_PATH, which may override RTE_EAL_PMD_PATH.
 895                  */
 896                 (geteuid() == getuid() && getegid() == getgid() ?
 897                  getenv("MLX4_GLUE_PATH") : NULL),
 898                 /*
 899                  * When RTE_EAL_PMD_PATH is set, use its glue-suffixed
 900                  * variant, otherwise let dlopen() look up libraries on its
 901                  * own.
 902                  */
 903                 (*RTE_EAL_PMD_PATH ?
 904                  mlx4_glue_path(glue_path, sizeof(glue_path)) : ""),
 905         };
 906         unsigned int i = 0;
 907         void *handle = NULL;
 908         void **sym;
 909         const char *dlmsg;
 910
 911         while (!handle && i != RTE_DIM(path)) {
 912                 const char *end;
 913                 size_t len;
 914                 int ret;
 915
 916                 if (!path[i]) {
 917                         ++i;
 918                         continue;
 919                 }
 920                 end = strpbrk(path[i], ":;");
 921                 if (!end)
 922                         end = path[i] + strlen(path[i]);
 923                 len = end - path[i];
 924                 ret = 0;
 925                 do {
 926                         char name[ret + 1];
 927
 928                         ret = snprintf(name, sizeof(name), "%.*s%s" MLX4_GLUE,
 929                                        (int)len, path[i],
 930                                        (!len || *(end - 1) == '/') ? "" : "/");
 931                         if (ret == -1)
 932                                 break;
 933                         if (sizeof(name) != (size_t)ret + 1)
 934                                 continue;
 935                         DEBUG("looking for rdma-core glue as \"%s\"", name);
 936                         handle = dlopen(name, RTLD_LAZY);
 937                         break;
 938                 } while (1);
 939                 path[i] = end + 1;
 940                 if (!*end)
 941                         ++i;
 942         }
 943         if (!handle) {
 944                 rte_errno = EINVAL;
 945                 dlmsg = dlerror();
 946                 if (dlmsg)
 947                         WARN("cannot load glue library: %s", dlmsg);
 948                 goto glue_error;
 949         }
 950         sym = dlsym(handle, "mlx4_glue");
 951         if (!sym || !*sym) {
 952                 rte_errno = EINVAL;
 953                 dlmsg = dlerror();
 954                 if (dlmsg)
 955                         ERROR("cannot resolve glue symbol: %s", dlmsg);
 956                 goto glue_error;
 957         }
 958         mlx4_glue = *sym;
 959         return 0;
 960 glue_error:
 961         if (handle)
 962                 dlclose(handle);
 963         WARN("cannot initialize PMD due to missing run-time"
 964              " dependency on rdma-core libraries (libibverbs,"
 965              " libmlx4)");
 966         return -rte_errno;
 967 }
 968
 969 #endif
 970
 971 /**
 972  * Driver initialization routine.
 973  */
 974 RTE_INIT(rte_mlx4_pmd_init)
 975 {
 976         /*
 977          * MLX4_DEVICE_FATAL_CLEANUP tells ibv_destroy functions we
 978          * want to get success errno value in case of calling them
 979          * when the device was removed.
 980          */
 981         setenv("MLX4_DEVICE_FATAL_CLEANUP", "1", 1);
 982         /*
 983          * RDMAV_HUGEPAGES_SAFE tells ibv_fork_init() we intend to use
 984          * huge pages. Calling ibv_fork_init() during init allows
 985          * applications to use fork() safely for purposes other than
 986          * using this PMD, which is not supported in forked processes.
 987          */
 988         setenv("RDMAV_HUGEPAGES_SAFE", "1", 1);
 989 #ifdef RTE_LIBRTE_MLX4_DLOPEN_DEPS
 990         if (mlx4_glue_init())
 991                 return;
 992         assert(mlx4_glue);
 993 #endif
 994 #ifndef NDEBUG
 995         /* Glue structure must not contain any NULL pointers. */
 996         {
 997                 unsigned int i;
 998
 999                 for (i = 0; i != sizeof(*mlx4_glue) / sizeof(void *); ++i)
1000                         assert(((const void *const *)mlx4_glue)[i]);
1001         }
1002 #endif
1003         if (strcmp(mlx4_glue->version, MLX4_GLUE_VERSION)) {
1004                 ERROR("rdma-core glue \"%s\" mismatch: \"%s\" is required",
1005                       mlx4_glue->version, MLX4_GLUE_VERSION);
1006                 return;
1007         }
1008         mlx4_glue->fork_init();
1009         rte_pci_register(&mlx4_driver);
1010         rte_mem_event_callback_register("MLX4_MEM_EVENT_CB",
1011                                         mlx4_mr_mem_event_cb, NULL);
1012 }
1013
1014 RTE_PMD_EXPORT_NAME(net_mlx4, __COUNTER__);
1015 RTE_PMD_REGISTER_PCI_TABLE(net_mlx4, mlx4_pci_id_map);
1016 RTE_PMD_REGISTER_KMOD_DEP(net_mlx4,
1017         "* ib_uverbs & mlx4_en & mlx4_core & mlx4_ib");