drivers/net/mlx5/mlx5_ethdev.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright 2015 6WIND S.A.
   3  * Copyright 2015 Mellanox Technologies, Ltd
   4  */
   5
   6 #define _GNU_SOURCE
   7
   8 #include <stddef.h>
   9 #include <assert.h>
  10 #include <inttypes.h>
  11 #include <unistd.h>
  12 #include <stdint.h>
  13 #include <stdio.h>
  14 #include <string.h>
  15 #include <stdlib.h>
  16 #include <errno.h>
  17 #include <dirent.h>
  18 #include <net/if.h>
  19 #include <sys/ioctl.h>
  20 #include <sys/socket.h>
  21 #include <netinet/in.h>
  22 #include <linux/ethtool.h>
  23 #include <linux/sockios.h>
  24 #include <fcntl.h>
  25 #include <stdalign.h>
  26 #include <sys/un.h>
  27 #include <time.h>
  28
  29 #include <rte_atomic.h>
  30 #include <rte_ethdev_driver.h>
  31 #include <rte_bus_pci.h>
  32 #include <rte_mbuf.h>
  33 #include <rte_common.h>
  34 #include <rte_interrupts.h>
  35 #include <rte_malloc.h>
  36 #include <rte_string_fns.h>
  37
  38 #include "mlx5.h"
  39 #include "mlx5_glue.h"
  40 #include "mlx5_rxtx.h"
  41 #include "mlx5_utils.h"
  42
  43 /* Add defines in case the running kernel is not the same as user headers. */
  44 #ifndef ETHTOOL_GLINKSETTINGS
  45 struct ethtool_link_settings {
  46         uint32_t cmd;
  47         uint32_t speed;
  48         uint8_t duplex;
  49         uint8_t port;
  50         uint8_t phy_address;
  51         uint8_t autoneg;
  52         uint8_t mdio_support;
  53         uint8_t eth_to_mdix;
  54         uint8_t eth_tp_mdix_ctrl;
  55         int8_t link_mode_masks_nwords;
  56         uint32_t reserved[8];
  57         uint32_t link_mode_masks[];
  58 };
  59
  60 #define ETHTOOL_GLINKSETTINGS 0x0000004c
  61 #define ETHTOOL_LINK_MODE_1000baseT_Full_BIT 5
  62 #define ETHTOOL_LINK_MODE_Autoneg_BIT 6
  63 #define ETHTOOL_LINK_MODE_1000baseKX_Full_BIT 17
  64 #define ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT 18
  65 #define ETHTOOL_LINK_MODE_10000baseKR_Full_BIT 19
  66 #define ETHTOOL_LINK_MODE_10000baseR_FEC_BIT 20
  67 #define ETHTOOL_LINK_MODE_20000baseMLD2_Full_BIT 21
  68 #define ETHTOOL_LINK_MODE_20000baseKR2_Full_BIT 22
  69 #define ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT 23
  70 #define ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT 24
  71 #define ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT 25
  72 #define ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT 26
  73 #define ETHTOOL_LINK_MODE_56000baseKR4_Full_BIT 27
  74 #define ETHTOOL_LINK_MODE_56000baseCR4_Full_BIT 28
  75 #define ETHTOOL_LINK_MODE_56000baseSR4_Full_BIT 29
  76 #define ETHTOOL_LINK_MODE_56000baseLR4_Full_BIT 30
  77 #endif
  78 #ifndef HAVE_ETHTOOL_LINK_MODE_25G
  79 #define ETHTOOL_LINK_MODE_25000baseCR_Full_BIT 31
  80 #define ETHTOOL_LINK_MODE_25000baseKR_Full_BIT 32
  81 #define ETHTOOL_LINK_MODE_25000baseSR_Full_BIT 33
  82 #endif
  83 #ifndef HAVE_ETHTOOL_LINK_MODE_50G
  84 #define ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT 34
  85 #define ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT 35
  86 #endif
  87 #ifndef HAVE_ETHTOOL_LINK_MODE_100G
  88 #define ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT 36
  89 #define ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT 37
  90 #define ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT 38
  91 #define ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT 39
  92 #endif
  93
  94 /**
  95  * Get interface name from private structure.
  96  *
  97  * @param[in] dev
  98  *   Pointer to Ethernet device.
  99  * @param[out] ifname
 100  *   Interface name output buffer.
 101  *
 102  * @return
 103  *   0 on success, a negative errno value otherwise and rte_errno is set.
 104  */
 105 int
 106 mlx5_get_ifname(const struct rte_eth_dev *dev, char (*ifname)[IF_NAMESIZE])
 107 {
 108         struct priv *priv = dev->data->dev_private;
 109         DIR *dir;
 110         struct dirent *dent;
 111         unsigned int dev_type = 0;
 112         unsigned int dev_port_prev = ~0u;
 113         char match[IF_NAMESIZE] = "";
 114
 115         {
 116                 MKSTR(path, "%s/device/net", priv->ibdev_path);
 117
 118                 dir = opendir(path);
 119                 if (dir == NULL) {
 120                         rte_errno = errno;
 121                         return -rte_errno;
 122                 }
 123         }
 124         while ((dent = readdir(dir)) != NULL) {
 125                 char *name = dent->d_name;
 126                 FILE *file;
 127                 unsigned int dev_port;
 128                 int r;
 129
 130                 if ((name[0] == '.') &&
 131                     ((name[1] == '\0') ||
 132                      ((name[1] == '.') && (name[2] == '\0'))))
 133                         continue;
 134
 135                 MKSTR(path, "%s/device/net/%s/%s",
 136                       priv->ibdev_path, name,
 137                       (dev_type ? "dev_id" : "dev_port"));
 138
 139                 file = fopen(path, "rb");
 140                 if (file == NULL) {
 141                         if (errno != ENOENT)
 142                                 continue;
 143                         /*
 144                          * Switch to dev_id when dev_port does not exist as
 145                          * is the case with Linux kernel versions < 3.15.
 146                          */
 147 try_dev_id:
 148                         match[0] = '\0';
 149                         if (dev_type)
 150                                 break;
 151                         dev_type = 1;
 152                         dev_port_prev = ~0u;
 153                         rewinddir(dir);
 154                         continue;
 155                 }
 156                 r = fscanf(file, (dev_type ? "%x" : "%u"), &dev_port);
 157                 fclose(file);
 158                 if (r != 1)
 159                         continue;
 160                 /*
 161                  * Switch to dev_id when dev_port returns the same value for
 162                  * all ports. May happen when using a MOFED release older than
 163                  * 3.0 with a Linux kernel >= 3.15.
 164                  */
 165                 if (dev_port == dev_port_prev)
 166                         goto try_dev_id;
 167                 dev_port_prev = dev_port;
 168                 if (dev_port == (priv->port - 1u))
 169                         strlcpy(match, name, sizeof(match));
 170         }
 171         closedir(dir);
 172         if (match[0] == '\0') {
 173                 rte_errno = ENOENT;
 174                 return -rte_errno;
 175         }
 176         strncpy(*ifname, match, sizeof(*ifname));
 177         return 0;
 178 }
 179
 180 /**
 181  * Get the interface index from device name.
 182  *
 183  * @param[in] dev
 184  *   Pointer to Ethernet device.
 185  *
 186  * @return
 187  *   Interface index on success, a negative errno value otherwise and
 188  *   rte_errno is set.
 189  */
 190 int
 191 mlx5_ifindex(const struct rte_eth_dev *dev)
 192 {
 193         char ifname[IF_NAMESIZE];
 194         int ret;
 195
 196         ret = mlx5_get_ifname(dev, &ifname);
 197         if (ret)
 198                 return ret;
 199         ret = if_nametoindex(ifname);
 200         if (ret == -1) {
 201                 rte_errno = errno;
 202                 return -rte_errno;
 203         }
 204         return ret;
 205 }
 206
 207 /**
 208  * Perform ifreq ioctl() on associated Ethernet device.
 209  *
 210  * @param[in] dev
 211  *   Pointer to Ethernet device.
 212  * @param req
 213  *   Request number to pass to ioctl().
 214  * @param[out] ifr
 215  *   Interface request structure output buffer.
 216  *
 217  * @return
 218  *   0 on success, a negative errno value otherwise and rte_errno is set.
 219  */
 220 int
 221 mlx5_ifreq(const struct rte_eth_dev *dev, int req, struct ifreq *ifr)
 222 {
 223         int sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP);
 224         int ret = 0;
 225
 226         if (sock == -1) {
 227                 rte_errno = errno;
 228                 return -rte_errno;
 229         }
 230         ret = mlx5_get_ifname(dev, &ifr->ifr_name);
 231         if (ret)
 232                 goto error;
 233         ret = ioctl(sock, req, ifr);
 234         if (ret == -1) {
 235                 rte_errno = errno;
 236                 goto error;
 237         }
 238         close(sock);
 239         return 0;
 240 error:
 241         close(sock);
 242         return -rte_errno;
 243 }
 244
 245 /**
 246  * Get device MTU.
 247  *
 248  * @param dev
 249  *   Pointer to Ethernet device.
 250  * @param[out] mtu
 251  *   MTU value output buffer.
 252  *
 253  * @return
 254  *   0 on success, a negative errno value otherwise and rte_errno is set.
 255  */
 256 int
 257 mlx5_get_mtu(struct rte_eth_dev *dev, uint16_t *mtu)
 258 {
 259         struct ifreq request;
 260         int ret = mlx5_ifreq(dev, SIOCGIFMTU, &request);
 261
 262         if (ret)
 263                 return ret;
 264         *mtu = request.ifr_mtu;
 265         return 0;
 266 }
 267
 268 /**
 269  * Set device MTU.
 270  *
 271  * @param dev
 272  *   Pointer to Ethernet device.
 273  * @param mtu
 274  *   MTU value to set.
 275  *
 276  * @return
 277  *   0 on success, a negative errno value otherwise and rte_errno is set.
 278  */
 279 static int
 280 mlx5_set_mtu(struct rte_eth_dev *dev, uint16_t mtu)
 281 {
 282         struct ifreq request = { .ifr_mtu = mtu, };
 283
 284         return mlx5_ifreq(dev, SIOCSIFMTU, &request);
 285 }
 286
 287 /**
 288  * Set device flags.
 289  *
 290  * @param dev
 291  *   Pointer to Ethernet device.
 292  * @param keep
 293  *   Bitmask for flags that must remain untouched.
 294  * @param flags
 295  *   Bitmask for flags to modify.
 296  *
 297  * @return
 298  *   0 on success, a negative errno value otherwise and rte_errno is set.
 299  */
 300 int
 301 mlx5_set_flags(struct rte_eth_dev *dev, unsigned int keep, unsigned int flags)
 302 {
 303         struct ifreq request;
 304         int ret = mlx5_ifreq(dev, SIOCGIFFLAGS, &request);
 305
 306         if (ret)
 307                 return ret;
 308         request.ifr_flags &= keep;
 309         request.ifr_flags |= flags & ~keep;
 310         return mlx5_ifreq(dev, SIOCSIFFLAGS, &request);
 311 }
 312
 313 /**
 314  * DPDK callback for Ethernet device configuration.
 315  *
 316  * @param dev
 317  *   Pointer to Ethernet device structure.
 318  *
 319  * @return
 320  *   0 on success, a negative errno value otherwise and rte_errno is set.
 321  */
 322 int
 323 mlx5_dev_configure(struct rte_eth_dev *dev)
 324 {
 325         struct priv *priv = dev->data->dev_private;
 326         unsigned int rxqs_n = dev->data->nb_rx_queues;
 327         unsigned int txqs_n = dev->data->nb_tx_queues;
 328         unsigned int i;
 329         unsigned int j;
 330         unsigned int reta_idx_n;
 331         const uint8_t use_app_rss_key =
 332                 !!dev->data->dev_conf.rx_adv_conf.rss_conf.rss_key;
 333         int ret = 0;
 334
 335         if (use_app_rss_key &&
 336             (dev->data->dev_conf.rx_adv_conf.rss_conf.rss_key_len !=
 337              rss_hash_default_key_len)) {
 338                 DRV_LOG(ERR, "port %u RSS key len must be %zu Bytes long",
 339                         dev->data->port_id, rss_hash_default_key_len);
 340                 rte_errno = EINVAL;
 341                 return -rte_errno;
 342         }
 343         priv->rss_conf.rss_key =
 344                 rte_realloc(priv->rss_conf.rss_key,
 345                             rss_hash_default_key_len, 0);
 346         if (!priv->rss_conf.rss_key) {
 347                 DRV_LOG(ERR, "port %u cannot allocate RSS hash key memory (%u)",
 348                         dev->data->port_id, rxqs_n);
 349                 rte_errno = ENOMEM;
 350                 return -rte_errno;
 351         }
 352         memcpy(priv->rss_conf.rss_key,
 353                use_app_rss_key ?
 354                dev->data->dev_conf.rx_adv_conf.rss_conf.rss_key :
 355                rss_hash_default_key,
 356                rss_hash_default_key_len);
 357         priv->rss_conf.rss_key_len = rss_hash_default_key_len;
 358         priv->rss_conf.rss_hf = dev->data->dev_conf.rx_adv_conf.rss_conf.rss_hf;
 359         priv->rxqs = (void *)dev->data->rx_queues;
 360         priv->txqs = (void *)dev->data->tx_queues;
 361         if (txqs_n != priv->txqs_n) {
 362                 DRV_LOG(INFO, "port %u Tx queues number update: %u -> %u",
 363                         dev->data->port_id, priv->txqs_n, txqs_n);
 364                 priv->txqs_n = txqs_n;
 365         }
 366         if (rxqs_n > priv->config.ind_table_max_size) {
 367                 DRV_LOG(ERR, "port %u cannot handle this many Rx queues (%u)",
 368                         dev->data->port_id, rxqs_n);
 369                 rte_errno = EINVAL;
 370                 return -rte_errno;
 371         }
 372         if (rxqs_n == priv->rxqs_n)
 373                 return 0;
 374         DRV_LOG(INFO, "port %u Rx queues number update: %u -> %u",
 375                 dev->data->port_id, priv->rxqs_n, rxqs_n);
 376         priv->rxqs_n = rxqs_n;
 377         /* If the requested number of RX queues is not a power of two, use the
 378          * maximum indirection table size for better balancing.
 379          * The result is always rounded to the next power of two. */
 380         reta_idx_n = (1 << log2above((rxqs_n & (rxqs_n - 1)) ?
 381                                      priv->config.ind_table_max_size :
 382                                      rxqs_n));
 383         ret = mlx5_rss_reta_index_resize(dev, reta_idx_n);
 384         if (ret)
 385                 return ret;
 386         /* When the number of RX queues is not a power of two, the remaining
 387          * table entries are padded with reused WQs and hashes are not spread
 388          * uniformly. */
 389         for (i = 0, j = 0; (i != reta_idx_n); ++i) {
 390                 (*priv->reta_idx)[i] = j;
 391                 if (++j == rxqs_n)
 392                         j = 0;
 393         }
 394         return 0;
 395 }
 396
 397 /**
 398  * Sets default tuning parameters.
 399  *
 400  * @param dev
 401  *   Pointer to Ethernet device.
 402  * @param[out] info
 403  *   Info structure output buffer.
 404  */
 405 static void
 406 mlx5_set_default_params(struct rte_eth_dev *dev, struct rte_eth_dev_info *info)
 407 {
 408         struct priv *priv = dev->data->dev_private;
 409
 410         /* Minimum CPU utilization. */
 411         info->default_rxportconf.ring_size = 256;
 412         info->default_txportconf.ring_size = 256;
 413         info->default_rxportconf.burst_size = 64;
 414         info->default_txportconf.burst_size = 64;
 415         if (priv->link_speed_capa & ETH_LINK_SPEED_100G) {
 416                 info->default_rxportconf.nb_queues = 16;
 417                 info->default_txportconf.nb_queues = 16;
 418                 if (dev->data->nb_rx_queues > 2 ||
 419                     dev->data->nb_tx_queues > 2) {
 420                         /* Max Throughput. */
 421                         info->default_rxportconf.ring_size = 2048;
 422                         info->default_txportconf.ring_size = 2048;
 423                 }
 424         } else {
 425                 info->default_rxportconf.nb_queues = 8;
 426                 info->default_txportconf.nb_queues = 8;
 427                 if (dev->data->nb_rx_queues > 2 ||
 428                     dev->data->nb_tx_queues > 2) {
 429                         /* Max Throughput. */
 430                         info->default_rxportconf.ring_size = 4096;
 431                         info->default_txportconf.ring_size = 4096;
 432                 }
 433         }
 434 }
 435
 436 /**
 437  * DPDK callback to get information about the device.
 438  *
 439  * @param dev
 440  *   Pointer to Ethernet device structure.
 441  * @param[out] info
 442  *   Info structure output buffer.
 443  */
 444 void
 445 mlx5_dev_infos_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *info)
 446 {
 447         struct priv *priv = dev->data->dev_private;
 448         struct mlx5_dev_config *config = &priv->config;
 449         unsigned int max;
 450         char ifname[IF_NAMESIZE];
 451
 452         /* FIXME: we should ask the device for these values. */
 453         info->min_rx_bufsize = 32;
 454         info->max_rx_pktlen = 65536;
 455         /*
 456          * Since we need one CQ per QP, the limit is the minimum number
 457          * between the two values.
 458          */
 459         max = RTE_MIN(priv->device_attr.orig_attr.max_cq,
 460                       priv->device_attr.orig_attr.max_qp);
 461         /* If max >= 65535 then max = 0, max_rx_queues is uint16_t. */
 462         if (max >= 65535)
 463                 max = 65535;
 464         info->max_rx_queues = max;
 465         info->max_tx_queues = max;
 466         info->max_mac_addrs = MLX5_MAX_UC_MAC_ADDRESSES;
 467         info->rx_queue_offload_capa = mlx5_get_rx_queue_offloads(dev);
 468         info->rx_offload_capa = (mlx5_get_rx_port_offloads() |
 469                                  info->rx_queue_offload_capa);
 470         info->tx_offload_capa = mlx5_get_tx_port_offloads(dev);
 471         if (mlx5_get_ifname(dev, &ifname) == 0)
 472                 info->if_index = if_nametoindex(ifname);
 473         info->reta_size = priv->reta_idx_n ?
 474                 priv->reta_idx_n : config->ind_table_max_size;
 475         info->hash_key_size = rss_hash_default_key_len;
 476         info->speed_capa = priv->link_speed_capa;
 477         info->flow_type_rss_offloads = ~MLX5_RSS_HF_MASK;
 478         mlx5_set_default_params(dev, info);
 479 }
 480
 481 /**
 482  * Get supported packet types.
 483  *
 484  * @param dev
 485  *   Pointer to Ethernet device structure.
 486  *
 487  * @return
 488  *   A pointer to the supported Packet types array.
 489  */
 490 const uint32_t *
 491 mlx5_dev_supported_ptypes_get(struct rte_eth_dev *dev)
 492 {
 493         static const uint32_t ptypes[] = {
 494                 /* refers to rxq_cq_to_pkt_type() */
 495                 RTE_PTYPE_L2_ETHER,
 496                 RTE_PTYPE_L3_IPV4_EXT_UNKNOWN,
 497                 RTE_PTYPE_L3_IPV6_EXT_UNKNOWN,
 498                 RTE_PTYPE_L4_NONFRAG,
 499                 RTE_PTYPE_L4_FRAG,
 500                 RTE_PTYPE_L4_TCP,
 501                 RTE_PTYPE_L4_UDP,
 502                 RTE_PTYPE_INNER_L3_IPV4_EXT_UNKNOWN,
 503                 RTE_PTYPE_INNER_L3_IPV6_EXT_UNKNOWN,
 504                 RTE_PTYPE_INNER_L4_NONFRAG,
 505                 RTE_PTYPE_INNER_L4_FRAG,
 506                 RTE_PTYPE_INNER_L4_TCP,
 507                 RTE_PTYPE_INNER_L4_UDP,
 508                 RTE_PTYPE_UNKNOWN
 509         };
 510
 511         if (dev->rx_pkt_burst == mlx5_rx_burst ||
 512             dev->rx_pkt_burst == mlx5_rx_burst_vec)
 513                 return ptypes;
 514         return NULL;
 515 }
 516
 517 /**
 518  * DPDK callback to retrieve physical link information.
 519  *
 520  * @param dev
 521  *   Pointer to Ethernet device structure.
 522  * @param[out] link
 523  *   Storage for current link status.
 524  *
 525  * @return
 526  *   0 on success, a negative errno value otherwise and rte_errno is set.
 527  */
 528 static int
 529 mlx5_link_update_unlocked_gset(struct rte_eth_dev *dev,
 530                                struct rte_eth_link *link)
 531 {
 532         struct priv *priv = dev->data->dev_private;
 533         struct ethtool_cmd edata = {
 534                 .cmd = ETHTOOL_GSET /* Deprecated since Linux v4.5. */
 535         };
 536         struct ifreq ifr;
 537         struct rte_eth_link dev_link;
 538         int link_speed = 0;
 539         int ret;
 540
 541         ret = mlx5_ifreq(dev, SIOCGIFFLAGS, &ifr);
 542         if (ret) {
 543                 DRV_LOG(WARNING, "port %u ioctl(SIOCGIFFLAGS) failed: %s",
 544                         dev->data->port_id, strerror(rte_errno));
 545                 return ret;
 546         }
 547         memset(&dev_link, 0, sizeof(dev_link));
 548         dev_link.link_status = ((ifr.ifr_flags & IFF_UP) &&
 549                                 (ifr.ifr_flags & IFF_RUNNING));
 550         ifr.ifr_data = (void *)&edata;
 551         ret = mlx5_ifreq(dev, SIOCETHTOOL, &ifr);
 552         if (ret) {
 553                 DRV_LOG(WARNING,
 554                         "port %u ioctl(SIOCETHTOOL, ETHTOOL_GSET) failed: %s",
 555                         dev->data->port_id, strerror(rte_errno));
 556                 return ret;
 557         }
 558         link_speed = ethtool_cmd_speed(&edata);
 559         if (link_speed == -1)
 560                 dev_link.link_speed = ETH_SPEED_NUM_NONE;
 561         else
 562                 dev_link.link_speed = link_speed;
 563         priv->link_speed_capa = 0;
 564         if (edata.supported & SUPPORTED_Autoneg)
 565                 priv->link_speed_capa |= ETH_LINK_SPEED_AUTONEG;
 566         if (edata.supported & (SUPPORTED_1000baseT_Full |
 567                                SUPPORTED_1000baseKX_Full))
 568                 priv->link_speed_capa |= ETH_LINK_SPEED_1G;
 569         if (edata.supported & SUPPORTED_10000baseKR_Full)
 570                 priv->link_speed_capa |= ETH_LINK_SPEED_10G;
 571         if (edata.supported & (SUPPORTED_40000baseKR4_Full |
 572                                SUPPORTED_40000baseCR4_Full |
 573                                SUPPORTED_40000baseSR4_Full |
 574                                SUPPORTED_40000baseLR4_Full))
 575                 priv->link_speed_capa |= ETH_LINK_SPEED_40G;
 576         dev_link.link_duplex = ((edata.duplex == DUPLEX_HALF) ?
 577                                 ETH_LINK_HALF_DUPLEX : ETH_LINK_FULL_DUPLEX);
 578         dev_link.link_autoneg = !(dev->data->dev_conf.link_speeds &
 579                         ETH_LINK_SPEED_FIXED);
 580         if ((dev_link.link_speed && !dev_link.link_status) ||
 581             (!dev_link.link_speed && dev_link.link_status)) {
 582                 rte_errno = EAGAIN;
 583                 return -rte_errno;
 584         }
 585         *link = dev_link;
 586         return 0;
 587 }
 588
 589 /**
 590  * Retrieve physical link information (unlocked version using new ioctl).
 591  *
 592  * @param dev
 593  *   Pointer to Ethernet device structure.
 594  * @param[out] link
 595  *   Storage for current link status.
 596  *
 597  * @return
 598  *   0 on success, a negative errno value otherwise and rte_errno is set.
 599  */
 600 static int
 601 mlx5_link_update_unlocked_gs(struct rte_eth_dev *dev,
 602                              struct rte_eth_link *link)
 603
 604 {
 605         struct priv *priv = dev->data->dev_private;
 606         struct ethtool_link_settings gcmd = { .cmd = ETHTOOL_GLINKSETTINGS };
 607         struct ifreq ifr;
 608         struct rte_eth_link dev_link;
 609         uint64_t sc;
 610         int ret;
 611
 612         ret = mlx5_ifreq(dev, SIOCGIFFLAGS, &ifr);
 613         if (ret) {
 614                 DRV_LOG(WARNING, "port %u ioctl(SIOCGIFFLAGS) failed: %s",
 615                         dev->data->port_id, strerror(rte_errno));
 616                 return ret;
 617         }
 618         memset(&dev_link, 0, sizeof(dev_link));
 619         dev_link.link_status = ((ifr.ifr_flags & IFF_UP) &&
 620                                 (ifr.ifr_flags & IFF_RUNNING));
 621         ifr.ifr_data = (void *)&gcmd;
 622         ret = mlx5_ifreq(dev, SIOCETHTOOL, &ifr);
 623         if (ret) {
 624                 DRV_LOG(DEBUG,
 625                         "port %u ioctl(SIOCETHTOOL, ETHTOOL_GLINKSETTINGS)"
 626                         " failed: %s",
 627                         dev->data->port_id, strerror(rte_errno));
 628                 return ret;
 629         }
 630         gcmd.link_mode_masks_nwords = -gcmd.link_mode_masks_nwords;
 631
 632         alignas(struct ethtool_link_settings)
 633         uint8_t data[offsetof(struct ethtool_link_settings, link_mode_masks) +
 634                      sizeof(uint32_t) * gcmd.link_mode_masks_nwords * 3];
 635         struct ethtool_link_settings *ecmd = (void *)data;
 636
 637         *ecmd = gcmd;
 638         ifr.ifr_data = (void *)ecmd;
 639         ret = mlx5_ifreq(dev, SIOCETHTOOL, &ifr);
 640         if (ret) {
 641                 DRV_LOG(DEBUG,
 642                         "port %u ioctl(SIOCETHTOOL, ETHTOOL_GLINKSETTINGS)"
 643                         " failed: %s",
 644                         dev->data->port_id, strerror(rte_errno));
 645                 return ret;
 646         }
 647         dev_link.link_speed = ecmd->speed;
 648         sc = ecmd->link_mode_masks[0] |
 649                 ((uint64_t)ecmd->link_mode_masks[1] << 32);
 650         priv->link_speed_capa = 0;
 651         if (sc & MLX5_BITSHIFT(ETHTOOL_LINK_MODE_Autoneg_BIT))
 652                 priv->link_speed_capa |= ETH_LINK_SPEED_AUTONEG;
 653         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_1000baseT_Full_BIT) |
 654                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_1000baseKX_Full_BIT)))
 655                 priv->link_speed_capa |= ETH_LINK_SPEED_1G;
 656         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT) |
 657                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT) |
 658                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_10000baseR_FEC_BIT)))
 659                 priv->link_speed_capa |= ETH_LINK_SPEED_10G;
 660         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_20000baseMLD2_Full_BIT) |
 661                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_20000baseKR2_Full_BIT)))
 662                 priv->link_speed_capa |= ETH_LINK_SPEED_20G;
 663         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT) |
 664                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT) |
 665                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT) |
 666                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT)))
 667                 priv->link_speed_capa |= ETH_LINK_SPEED_40G;
 668         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_56000baseKR4_Full_BIT) |
 669                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_56000baseCR4_Full_BIT) |
 670                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_56000baseSR4_Full_BIT) |
 671                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_56000baseLR4_Full_BIT)))
 672                 priv->link_speed_capa |= ETH_LINK_SPEED_56G;
 673         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_25000baseCR_Full_BIT) |
 674                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_25000baseKR_Full_BIT) |
 675                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_25000baseSR_Full_BIT)))
 676                 priv->link_speed_capa |= ETH_LINK_SPEED_25G;
 677         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT) |
 678                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT)))
 679                 priv->link_speed_capa |= ETH_LINK_SPEED_50G;
 680         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT) |
 681                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT) |
 682                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT) |
 683                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT)))
 684                 priv->link_speed_capa |= ETH_LINK_SPEED_100G;
 685         dev_link.link_duplex = ((ecmd->duplex == DUPLEX_HALF) ?
 686                                 ETH_LINK_HALF_DUPLEX : ETH_LINK_FULL_DUPLEX);
 687         dev_link.link_autoneg = !(dev->data->dev_conf.link_speeds &
 688                                   ETH_LINK_SPEED_FIXED);
 689         if ((dev_link.link_speed && !dev_link.link_status) ||
 690             (!dev_link.link_speed && dev_link.link_status)) {
 691                 rte_errno = EAGAIN;
 692                 return -rte_errno;
 693         }
 694         *link = dev_link;
 695         return 0;
 696 }
 697
 698 /**
 699  * DPDK callback to retrieve physical link information.
 700  *
 701  * @param dev
 702  *   Pointer to Ethernet device structure.
 703  * @param wait_to_complete
 704  *   Wait for request completion.
 705  *
 706  * @return
 707  *   0 if link status was not updated, positive if it was, a negative errno
 708  *   value otherwise and rte_errno is set.
 709  */
 710 int
 711 mlx5_link_update(struct rte_eth_dev *dev, int wait_to_complete)
 712 {
 713         int ret;
 714         struct rte_eth_link dev_link;
 715         time_t start_time = time(NULL);
 716
 717         do {
 718                 ret = mlx5_link_update_unlocked_gs(dev, &dev_link);
 719                 if (ret)
 720                         ret = mlx5_link_update_unlocked_gset(dev, &dev_link);
 721                 if (ret == 0)
 722                         break;
 723                 /* Handle wait to complete situation. */
 724                 if (wait_to_complete && ret == -EAGAIN) {
 725                         if (abs((int)difftime(time(NULL), start_time)) <
 726                             MLX5_LINK_STATUS_TIMEOUT) {
 727                                 usleep(0);
 728                                 continue;
 729                         } else {
 730                                 rte_errno = EBUSY;
 731                                 return -rte_errno;
 732                         }
 733                 } else if (ret < 0) {
 734                         return ret;
 735                 }
 736         } while (wait_to_complete);
 737         ret = !!memcmp(&dev->data->dev_link, &dev_link,
 738                        sizeof(struct rte_eth_link));
 739         dev->data->dev_link = dev_link;
 740         return ret;
 741 }
 742
 743 /**
 744  * DPDK callback to change the MTU.
 745  *
 746  * @param dev
 747  *   Pointer to Ethernet device structure.
 748  * @param in_mtu
 749  *   New MTU.
 750  *
 751  * @return
 752  *   0 on success, a negative errno value otherwise and rte_errno is set.
 753  */
 754 int
 755 mlx5_dev_set_mtu(struct rte_eth_dev *dev, uint16_t mtu)
 756 {
 757         struct priv *priv = dev->data->dev_private;
 758         uint16_t kern_mtu = 0;
 759         int ret;
 760
 761         ret = mlx5_get_mtu(dev, &kern_mtu);
 762         if (ret)
 763                 return ret;
 764         /* Set kernel interface MTU first. */
 765         ret = mlx5_set_mtu(dev, mtu);
 766         if (ret)
 767                 return ret;
 768         ret = mlx5_get_mtu(dev, &kern_mtu);
 769         if (ret)
 770                 return ret;
 771         if (kern_mtu == mtu) {
 772                 priv->mtu = mtu;
 773                 DRV_LOG(DEBUG, "port %u adapter MTU set to %u",
 774                         dev->data->port_id, mtu);
 775                 return 0;
 776         }
 777         rte_errno = EAGAIN;
 778         return -rte_errno;
 779 }
 780
 781 /**
 782  * DPDK callback to get flow control status.
 783  *
 784  * @param dev
 785  *   Pointer to Ethernet device structure.
 786  * @param[out] fc_conf
 787  *   Flow control output buffer.
 788  *
 789  * @return
 790  *   0 on success, a negative errno value otherwise and rte_errno is set.
 791  */
 792 int
 793 mlx5_dev_get_flow_ctrl(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
 794 {
 795         struct ifreq ifr;
 796         struct ethtool_pauseparam ethpause = {
 797                 .cmd = ETHTOOL_GPAUSEPARAM
 798         };
 799         int ret;
 800
 801         ifr.ifr_data = (void *)&ethpause;
 802         ret = mlx5_ifreq(dev, SIOCETHTOOL, &ifr);
 803         if (ret) {
 804                 DRV_LOG(WARNING,
 805                         "port %u ioctl(SIOCETHTOOL, ETHTOOL_GPAUSEPARAM) failed:"
 806                         " %s",
 807                         dev->data->port_id, strerror(rte_errno));
 808                 return ret;
 809         }
 810         fc_conf->autoneg = ethpause.autoneg;
 811         if (ethpause.rx_pause && ethpause.tx_pause)
 812                 fc_conf->mode = RTE_FC_FULL;
 813         else if (ethpause.rx_pause)
 814                 fc_conf->mode = RTE_FC_RX_PAUSE;
 815         else if (ethpause.tx_pause)
 816                 fc_conf->mode = RTE_FC_TX_PAUSE;
 817         else
 818                 fc_conf->mode = RTE_FC_NONE;
 819         return 0;
 820 }
 821
 822 /**
 823  * DPDK callback to modify flow control parameters.
 824  *
 825  * @param dev
 826  *   Pointer to Ethernet device structure.
 827  * @param[in] fc_conf
 828  *   Flow control parameters.
 829  *
 830  * @return
 831  *   0 on success, a negative errno value otherwise and rte_errno is set.
 832  */
 833 int
 834 mlx5_dev_set_flow_ctrl(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
 835 {
 836         struct ifreq ifr;
 837         struct ethtool_pauseparam ethpause = {
 838                 .cmd = ETHTOOL_SPAUSEPARAM
 839         };
 840         int ret;
 841
 842         ifr.ifr_data = (void *)&ethpause;
 843         ethpause.autoneg = fc_conf->autoneg;
 844         if (((fc_conf->mode & RTE_FC_FULL) == RTE_FC_FULL) ||
 845             (fc_conf->mode & RTE_FC_RX_PAUSE))
 846                 ethpause.rx_pause = 1;
 847         else
 848                 ethpause.rx_pause = 0;
 849
 850         if (((fc_conf->mode & RTE_FC_FULL) == RTE_FC_FULL) ||
 851             (fc_conf->mode & RTE_FC_TX_PAUSE))
 852                 ethpause.tx_pause = 1;
 853         else
 854                 ethpause.tx_pause = 0;
 855         ret = mlx5_ifreq(dev, SIOCETHTOOL, &ifr);
 856         if (ret) {
 857                 DRV_LOG(WARNING,
 858                         "port %u ioctl(SIOCETHTOOL, ETHTOOL_SPAUSEPARAM)"
 859                         " failed: %s",
 860                         dev->data->port_id, strerror(rte_errno));
 861                 return ret;
 862         }
 863         return 0;
 864 }
 865
 866 /**
 867  * Get PCI information from struct ibv_device.
 868  *
 869  * @param device
 870  *   Pointer to Ethernet device structure.
 871  * @param[out] pci_addr
 872  *   PCI bus address output buffer.
 873  *
 874  * @return
 875  *   0 on success, a negative errno value otherwise and rte_errno is set.
 876  */
 877 int
 878 mlx5_ibv_device_to_pci_addr(const struct ibv_device *device,
 879                             struct rte_pci_addr *pci_addr)
 880 {
 881         FILE *file;
 882         char line[32];
 883         MKSTR(path, "%s/device/uevent", device->ibdev_path);
 884
 885         file = fopen(path, "rb");
 886         if (file == NULL) {
 887                 rte_errno = errno;
 888                 return -rte_errno;
 889         }
 890         while (fgets(line, sizeof(line), file) == line) {
 891                 size_t len = strlen(line);
 892                 int ret;
 893
 894                 /* Truncate long lines. */
 895                 if (len == (sizeof(line) - 1))
 896                         while (line[(len - 1)] != '\n') {
 897                                 ret = fgetc(file);
 898                                 if (ret == EOF)
 899                                         break;
 900                                 line[(len - 1)] = ret;
 901                         }
 902                 /* Extract information. */
 903                 if (sscanf(line,
 904                            "PCI_SLOT_NAME="
 905                            "%" SCNx32 ":%" SCNx8 ":%" SCNx8 ".%" SCNx8 "\n",
 906                            &pci_addr->domain,
 907                            &pci_addr->bus,
 908                            &pci_addr->devid,
 909                            &pci_addr->function) == 4) {
 910                         ret = 0;
 911                         break;
 912                 }
 913         }
 914         fclose(file);
 915         return 0;
 916 }
 917
 918 /**
 919  * Device status handler.
 920  *
 921  * @param dev
 922  *   Pointer to Ethernet device.
 923  * @param events
 924  *   Pointer to event flags holder.
 925  *
 926  * @return
 927  *   Events bitmap of callback process which can be called immediately.
 928  */
 929 static uint32_t
 930 mlx5_dev_status_handler(struct rte_eth_dev *dev)
 931 {
 932         struct priv *priv = dev->data->dev_private;
 933         struct ibv_async_event event;
 934         uint32_t ret = 0;
 935
 936         if (mlx5_link_update(dev, 0) == -EAGAIN) {
 937                 usleep(0);
 938                 return 0;
 939         }
 940         /* Read all message and acknowledge them. */
 941         for (;;) {
 942                 if (mlx5_glue->get_async_event(priv->ctx, &event))
 943                         break;
 944                 if ((event.event_type == IBV_EVENT_PORT_ACTIVE ||
 945                         event.event_type == IBV_EVENT_PORT_ERR) &&
 946                         (dev->data->dev_conf.intr_conf.lsc == 1))
 947                         ret |= (1 << RTE_ETH_EVENT_INTR_LSC);
 948                 else if (event.event_type == IBV_EVENT_DEVICE_FATAL &&
 949                         dev->data->dev_conf.intr_conf.rmv == 1)
 950                         ret |= (1 << RTE_ETH_EVENT_INTR_RMV);
 951                 else
 952                         DRV_LOG(DEBUG,
 953                                 "port %u event type %d on not handled",
 954                                 dev->data->port_id, event.event_type);
 955                 mlx5_glue->ack_async_event(&event);
 956         }
 957         return ret;
 958 }
 959
 960 /**
 961  * Handle interrupts from the NIC.
 962  *
 963  * @param[in] intr_handle
 964  *   Interrupt handler.
 965  * @param cb_arg
 966  *   Callback argument.
 967  */
 968 void
 969 mlx5_dev_interrupt_handler(void *cb_arg)
 970 {
 971         struct rte_eth_dev *dev = cb_arg;
 972         uint32_t events;
 973
 974         events = mlx5_dev_status_handler(dev);
 975         if (events & (1 << RTE_ETH_EVENT_INTR_LSC))
 976                 _rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL);
 977         if (events & (1 << RTE_ETH_EVENT_INTR_RMV))
 978                 _rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_RMV, NULL);
 979 }
 980
 981 /**
 982  * Handle interrupts from the socket.
 983  *
 984  * @param cb_arg
 985  *   Callback argument.
 986  */
 987 static void
 988 mlx5_dev_handler_socket(void *cb_arg)
 989 {
 990         struct rte_eth_dev *dev = cb_arg;
 991
 992         mlx5_socket_handle(dev);
 993 }
 994
 995 /**
 996  * Uninstall interrupt handler.
 997  *
 998  * @param dev
 999  *   Pointer to Ethernet device.
1000  */
1001 void
1002 mlx5_dev_interrupt_handler_uninstall(struct rte_eth_dev *dev)
1003 {
1004         struct priv *priv = dev->data->dev_private;
1005
1006         if (dev->data->dev_conf.intr_conf.lsc ||
1007             dev->data->dev_conf.intr_conf.rmv)
1008                 rte_intr_callback_unregister(&priv->intr_handle,
1009                                              mlx5_dev_interrupt_handler, dev);
1010         if (priv->primary_socket)
1011                 rte_intr_callback_unregister(&priv->intr_handle_socket,
1012                                              mlx5_dev_handler_socket, dev);
1013         priv->intr_handle.fd = 0;
1014         priv->intr_handle.type = RTE_INTR_HANDLE_UNKNOWN;
1015         priv->intr_handle_socket.fd = 0;
1016         priv->intr_handle_socket.type = RTE_INTR_HANDLE_UNKNOWN;
1017 }
1018
1019 /**
1020  * Install interrupt handler.
1021  *
1022  * @param dev
1023  *   Pointer to Ethernet device.
1024  */
1025 void
1026 mlx5_dev_interrupt_handler_install(struct rte_eth_dev *dev)
1027 {
1028         struct priv *priv = dev->data->dev_private;
1029         int ret;
1030         int flags;
1031
1032         assert(priv->ctx->async_fd > 0);
1033         flags = fcntl(priv->ctx->async_fd, F_GETFL);
1034         ret = fcntl(priv->ctx->async_fd, F_SETFL, flags | O_NONBLOCK);
1035         if (ret) {
1036                 DRV_LOG(INFO,
1037                         "port %u failed to change file descriptor async event"
1038                         " queue",
1039                         dev->data->port_id);
1040                 dev->data->dev_conf.intr_conf.lsc = 0;
1041                 dev->data->dev_conf.intr_conf.rmv = 0;
1042         }
1043         if (dev->data->dev_conf.intr_conf.lsc ||
1044             dev->data->dev_conf.intr_conf.rmv) {
1045                 priv->intr_handle.fd = priv->ctx->async_fd;
1046                 priv->intr_handle.type = RTE_INTR_HANDLE_EXT;
1047                 rte_intr_callback_register(&priv->intr_handle,
1048                                            mlx5_dev_interrupt_handler, dev);
1049         }
1050         ret = mlx5_socket_init(dev);
1051         if (ret)
1052                 DRV_LOG(ERR, "port %u cannot initialise socket: %s",
1053                         dev->data->port_id, strerror(rte_errno));
1054         else if (priv->primary_socket) {
1055                 priv->intr_handle_socket.fd = priv->primary_socket;
1056                 priv->intr_handle_socket.type = RTE_INTR_HANDLE_EXT;
1057                 rte_intr_callback_register(&priv->intr_handle_socket,
1058                                            mlx5_dev_handler_socket, dev);
1059         }
1060 }
1061
1062 /**
1063  * DPDK callback to bring the link DOWN.
1064  *
1065  * @param dev
1066  *   Pointer to Ethernet device structure.
1067  *
1068  * @return
1069  *   0 on success, a negative errno value otherwise and rte_errno is set.
1070  */
1071 int
1072 mlx5_set_link_down(struct rte_eth_dev *dev)
1073 {
1074         return mlx5_set_flags(dev, ~IFF_UP, ~IFF_UP);
1075 }
1076
1077 /**
1078  * DPDK callback to bring the link UP.
1079  *
1080  * @param dev
1081  *   Pointer to Ethernet device structure.
1082  *
1083  * @return
1084  *   0 on success, a negative errno value otherwise and rte_errno is set.
1085  */
1086 int
1087 mlx5_set_link_up(struct rte_eth_dev *dev)
1088 {
1089         return mlx5_set_flags(dev, ~IFF_UP, IFF_UP);
1090 }
1091
1092 /**
1093  * Configure the TX function to use.
1094  *
1095  * @param dev
1096  *   Pointer to private data structure.
1097  *
1098  * @return
1099  *   Pointer to selected Tx burst function.
1100  */
1101 eth_tx_burst_t
1102 mlx5_select_tx_function(struct rte_eth_dev *dev)
1103 {
1104         struct priv *priv = dev->data->dev_private;
1105         eth_tx_burst_t tx_pkt_burst = mlx5_tx_burst;
1106         struct mlx5_dev_config *config = &priv->config;
1107         uint64_t tx_offloads = dev->data->dev_conf.txmode.offloads;
1108         int tso = !!(tx_offloads & (DEV_TX_OFFLOAD_TCP_TSO |
1109                                     DEV_TX_OFFLOAD_VXLAN_TNL_TSO |
1110                                     DEV_TX_OFFLOAD_GRE_TNL_TSO |
1111                                     DEV_TX_OFFLOAD_IP_TNL_TSO |
1112                                     DEV_TX_OFFLOAD_UDP_TNL_TSO));
1113         int swp = !!(tx_offloads & (DEV_TX_OFFLOAD_IP_TNL_TSO |
1114                                     DEV_TX_OFFLOAD_UDP_TNL_TSO |
1115                                     DEV_TX_OFFLOAD_OUTER_IPV4_CKSUM));
1116         int vlan_insert = !!(tx_offloads & DEV_TX_OFFLOAD_VLAN_INSERT);
1117
1118         assert(priv != NULL);
1119         /* Select appropriate TX function. */
1120         if (vlan_insert || tso || swp)
1121                 return tx_pkt_burst;
1122         if (config->mps == MLX5_MPW_ENHANCED) {
1123                 if (mlx5_check_vec_tx_support(dev) > 0) {
1124                         if (mlx5_check_raw_vec_tx_support(dev) > 0)
1125                                 tx_pkt_burst = mlx5_tx_burst_raw_vec;
1126                         else
1127                                 tx_pkt_burst = mlx5_tx_burst_vec;
1128                         DRV_LOG(DEBUG,
1129                                 "port %u selected enhanced MPW Tx vectorized"
1130                                 " function",
1131                                 dev->data->port_id);
1132                 } else {
1133                         tx_pkt_burst = mlx5_tx_burst_empw;
1134                         DRV_LOG(DEBUG,
1135                                 "port %u selected enhanced MPW Tx function",
1136                                 dev->data->port_id);
1137                 }
1138         } else if (config->mps && (config->txq_inline > 0)) {
1139                 tx_pkt_burst = mlx5_tx_burst_mpw_inline;
1140                 DRV_LOG(DEBUG, "port %u selected MPW inline Tx function",
1141                         dev->data->port_id);
1142         } else if (config->mps) {
1143                 tx_pkt_burst = mlx5_tx_burst_mpw;
1144                 DRV_LOG(DEBUG, "port %u selected MPW Tx function",
1145                         dev->data->port_id);
1146         }
1147         return tx_pkt_burst;
1148 }
1149
1150 /**
1151  * Configure the RX function to use.
1152  *
1153  * @param dev
1154  *   Pointer to private data structure.
1155  *
1156  * @return
1157  *   Pointer to selected Rx burst function.
1158  */
1159 eth_rx_burst_t
1160 mlx5_select_rx_function(struct rte_eth_dev *dev)
1161 {
1162         eth_rx_burst_t rx_pkt_burst = mlx5_rx_burst;
1163
1164         assert(dev != NULL);
1165         if (mlx5_check_vec_rx_support(dev) > 0) {
1166                 rx_pkt_burst = mlx5_rx_burst_vec;
1167                 DRV_LOG(DEBUG, "port %u selected Rx vectorized function",
1168                         dev->data->port_id);
1169         }
1170         return rx_pkt_burst;
1171 }
1172
1173 /**
1174  * Check if mlx5 device was removed.
1175  *
1176  * @param dev
1177  *   Pointer to Ethernet device structure.
1178  *
1179  * @return
1180  *   1 when device is removed, otherwise 0.
1181  */
1182 int
1183 mlx5_is_removed(struct rte_eth_dev *dev)
1184 {
1185         struct ibv_device_attr device_attr;
1186         struct priv *priv = dev->data->dev_private;
1187
1188         if (mlx5_glue->query_device(priv->ctx, &device_attr) == EIO)
1189                 return 1;
1190         return 0;
1191 }