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 #include <rte_rwlock.h>
  38
  39 #include "mlx5.h"
  40 #include "mlx5_glue.h"
  41 #include "mlx5_rxtx.h"
  42 #include "mlx5_utils.h"
  43
  44 /* Add defines in case the running kernel is not the same as user headers. */
  45 #ifndef ETHTOOL_GLINKSETTINGS
  46 struct ethtool_link_settings {
  47         uint32_t cmd;
  48         uint32_t speed;
  49         uint8_t duplex;
  50         uint8_t port;
  51         uint8_t phy_address;
  52         uint8_t autoneg;
  53         uint8_t mdio_support;
  54         uint8_t eth_to_mdix;
  55         uint8_t eth_tp_mdix_ctrl;
  56         int8_t link_mode_masks_nwords;
  57         uint32_t reserved[8];
  58         uint32_t link_mode_masks[];
  59 };
  60
  61 #define ETHTOOL_GLINKSETTINGS 0x0000004c
  62 #define ETHTOOL_LINK_MODE_1000baseT_Full_BIT 5
  63 #define ETHTOOL_LINK_MODE_Autoneg_BIT 6
  64 #define ETHTOOL_LINK_MODE_1000baseKX_Full_BIT 17
  65 #define ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT 18
  66 #define ETHTOOL_LINK_MODE_10000baseKR_Full_BIT 19
  67 #define ETHTOOL_LINK_MODE_10000baseR_FEC_BIT 20
  68 #define ETHTOOL_LINK_MODE_20000baseMLD2_Full_BIT 21
  69 #define ETHTOOL_LINK_MODE_20000baseKR2_Full_BIT 22
  70 #define ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT 23
  71 #define ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT 24
  72 #define ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT 25
  73 #define ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT 26
  74 #define ETHTOOL_LINK_MODE_56000baseKR4_Full_BIT 27
  75 #define ETHTOOL_LINK_MODE_56000baseCR4_Full_BIT 28
  76 #define ETHTOOL_LINK_MODE_56000baseSR4_Full_BIT 29
  77 #define ETHTOOL_LINK_MODE_56000baseLR4_Full_BIT 30
  78 #endif
  79 #ifndef HAVE_ETHTOOL_LINK_MODE_25G
  80 #define ETHTOOL_LINK_MODE_25000baseCR_Full_BIT 31
  81 #define ETHTOOL_LINK_MODE_25000baseKR_Full_BIT 32
  82 #define ETHTOOL_LINK_MODE_25000baseSR_Full_BIT 33
  83 #endif
  84 #ifndef HAVE_ETHTOOL_LINK_MODE_50G
  85 #define ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT 34
  86 #define ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT 35
  87 #endif
  88 #ifndef HAVE_ETHTOOL_LINK_MODE_100G
  89 #define ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT 36
  90 #define ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT 37
  91 #define ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT 38
  92 #define ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT 39
  93 #endif
  94
  95 /**
  96  * Get interface name from private structure.
  97  *
  98  * @param[in] dev
  99  *   Pointer to Ethernet device.
 100  * @param[out] ifname
 101  *   Interface name output buffer.
 102  *
 103  * @return
 104  *   0 on success, a negative errno value otherwise and rte_errno is set.
 105  */
 106 int
 107 mlx5_get_ifname(const struct rte_eth_dev *dev, char (*ifname)[IF_NAMESIZE])
 108 {
 109         struct priv *priv = dev->data->dev_private;
 110         DIR *dir;
 111         struct dirent *dent;
 112         unsigned int dev_type = 0;
 113         unsigned int dev_port_prev = ~0u;
 114         char match[IF_NAMESIZE] = "";
 115
 116         {
 117                 MKSTR(path, "%s/device/net", priv->ibdev_path);
 118
 119                 dir = opendir(path);
 120                 if (dir == NULL) {
 121                         rte_errno = errno;
 122                         return -rte_errno;
 123                 }
 124         }
 125         while ((dent = readdir(dir)) != NULL) {
 126                 char *name = dent->d_name;
 127                 FILE *file;
 128                 unsigned int dev_port;
 129                 int r;
 130
 131                 if ((name[0] == '.') &&
 132                     ((name[1] == '\0') ||
 133                      ((name[1] == '.') && (name[2] == '\0'))))
 134                         continue;
 135
 136                 MKSTR(path, "%s/device/net/%s/%s",
 137                       priv->ibdev_path, name,
 138                       (dev_type ? "dev_id" : "dev_port"));
 139
 140                 file = fopen(path, "rb");
 141                 if (file == NULL) {
 142                         if (errno != ENOENT)
 143                                 continue;
 144                         /*
 145                          * Switch to dev_id when dev_port does not exist as
 146                          * is the case with Linux kernel versions < 3.15.
 147                          */
 148 try_dev_id:
 149                         match[0] = '\0';
 150                         if (dev_type)
 151                                 break;
 152                         dev_type = 1;
 153                         dev_port_prev = ~0u;
 154                         rewinddir(dir);
 155                         continue;
 156                 }
 157                 r = fscanf(file, (dev_type ? "%x" : "%u"), &dev_port);
 158                 fclose(file);
 159                 if (r != 1)
 160                         continue;
 161                 /*
 162                  * Switch to dev_id when dev_port returns the same value for
 163                  * all ports. May happen when using a MOFED release older than
 164                  * 3.0 with a Linux kernel >= 3.15.
 165                  */
 166                 if (dev_port == dev_port_prev)
 167                         goto try_dev_id;
 168                 dev_port_prev = dev_port;
 169                 if (dev_port == (priv->port - 1u))
 170                         strlcpy(match, name, sizeof(match));
 171         }
 172         closedir(dir);
 173         if (match[0] == '\0') {
 174                 rte_errno = ENOENT;
 175                 return -rte_errno;
 176         }
 177         strncpy(*ifname, match, sizeof(*ifname));
 178         return 0;
 179 }
 180
 181 /**
 182  * Get the interface index from device name.
 183  *
 184  * @param[in] dev
 185  *   Pointer to Ethernet device.
 186  *
 187  * @return
 188  *   Interface index on success, a negative errno value otherwise and
 189  *   rte_errno is set.
 190  */
 191 int
 192 mlx5_ifindex(const struct rte_eth_dev *dev)
 193 {
 194         char ifname[IF_NAMESIZE];
 195         unsigned int ret;
 196
 197         ret = mlx5_get_ifname(dev, &ifname);
 198         if (ret)
 199                 return ret;
 200         ret = if_nametoindex(ifname);
 201         if (ret == 0) {
 202                 rte_errno = errno;
 203                 return -rte_errno;
 204         }
 205         return ret;
 206 }
 207
 208 /**
 209  * Perform ifreq ioctl() on associated Ethernet device.
 210  *
 211  * @param[in] dev
 212  *   Pointer to Ethernet device.
 213  * @param req
 214  *   Request number to pass to ioctl().
 215  * @param[out] ifr
 216  *   Interface request structure output buffer.
 217  *
 218  * @return
 219  *   0 on success, a negative errno value otherwise and rte_errno is set.
 220  */
 221 int
 222 mlx5_ifreq(const struct rte_eth_dev *dev, int req, struct ifreq *ifr)
 223 {
 224         int sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP);
 225         int ret = 0;
 226
 227         if (sock == -1) {
 228                 rte_errno = errno;
 229                 return -rte_errno;
 230         }
 231         ret = mlx5_get_ifname(dev, &ifr->ifr_name);
 232         if (ret)
 233                 goto error;
 234         ret = ioctl(sock, req, ifr);
 235         if (ret == -1) {
 236                 rte_errno = errno;
 237                 goto error;
 238         }
 239         close(sock);
 240         return 0;
 241 error:
 242         close(sock);
 243         return -rte_errno;
 244 }
 245
 246 /**
 247  * Get device MTU.
 248  *
 249  * @param dev
 250  *   Pointer to Ethernet device.
 251  * @param[out] mtu
 252  *   MTU value output buffer.
 253  *
 254  * @return
 255  *   0 on success, a negative errno value otherwise and rte_errno is set.
 256  */
 257 int
 258 mlx5_get_mtu(struct rte_eth_dev *dev, uint16_t *mtu)
 259 {
 260         struct ifreq request;
 261         int ret = mlx5_ifreq(dev, SIOCGIFMTU, &request);
 262
 263         if (ret)
 264                 return ret;
 265         *mtu = request.ifr_mtu;
 266         return 0;
 267 }
 268
 269 /**
 270  * Set device MTU.
 271  *
 272  * @param dev
 273  *   Pointer to Ethernet device.
 274  * @param mtu
 275  *   MTU value to set.
 276  *
 277  * @return
 278  *   0 on success, a negative errno value otherwise and rte_errno is set.
 279  */
 280 static int
 281 mlx5_set_mtu(struct rte_eth_dev *dev, uint16_t mtu)
 282 {
 283         struct ifreq request = { .ifr_mtu = mtu, };
 284
 285         return mlx5_ifreq(dev, SIOCSIFMTU, &request);
 286 }
 287
 288 /**
 289  * Set device flags.
 290  *
 291  * @param dev
 292  *   Pointer to Ethernet device.
 293  * @param keep
 294  *   Bitmask for flags that must remain untouched.
 295  * @param flags
 296  *   Bitmask for flags to modify.
 297  *
 298  * @return
 299  *   0 on success, a negative errno value otherwise and rte_errno is set.
 300  */
 301 int
 302 mlx5_set_flags(struct rte_eth_dev *dev, unsigned int keep, unsigned int flags)
 303 {
 304         struct ifreq request;
 305         int ret = mlx5_ifreq(dev, SIOCGIFFLAGS, &request);
 306
 307         if (ret)
 308                 return ret;
 309         request.ifr_flags &= keep;
 310         request.ifr_flags |= flags & ~keep;
 311         return mlx5_ifreq(dev, SIOCSIFFLAGS, &request);
 312 }
 313
 314 /**
 315  * DPDK callback for Ethernet device configuration.
 316  *
 317  * @param dev
 318  *   Pointer to Ethernet device structure.
 319  *
 320  * @return
 321  *   0 on success, a negative errno value otherwise and rte_errno is set.
 322  */
 323 int
 324 mlx5_dev_configure(struct rte_eth_dev *dev)
 325 {
 326         struct priv *priv = dev->data->dev_private;
 327         unsigned int rxqs_n = dev->data->nb_rx_queues;
 328         unsigned int txqs_n = dev->data->nb_tx_queues;
 329         unsigned int i;
 330         unsigned int j;
 331         unsigned int reta_idx_n;
 332         const uint8_t use_app_rss_key =
 333                 !!dev->data->dev_conf.rx_adv_conf.rss_conf.rss_key;
 334         int ret = 0;
 335
 336         if (use_app_rss_key &&
 337             (dev->data->dev_conf.rx_adv_conf.rss_conf.rss_key_len !=
 338              rss_hash_default_key_len)) {
 339                 DRV_LOG(ERR, "port %u RSS key len must be %zu Bytes long",
 340                         dev->data->port_id, rss_hash_default_key_len);
 341                 rte_errno = EINVAL;
 342                 return -rte_errno;
 343         }
 344         priv->rss_conf.rss_key =
 345                 rte_realloc(priv->rss_conf.rss_key,
 346                             rss_hash_default_key_len, 0);
 347         if (!priv->rss_conf.rss_key) {
 348                 DRV_LOG(ERR, "port %u cannot allocate RSS hash key memory (%u)",
 349                         dev->data->port_id, rxqs_n);
 350                 rte_errno = ENOMEM;
 351                 return -rte_errno;
 352         }
 353         memcpy(priv->rss_conf.rss_key,
 354                use_app_rss_key ?
 355                dev->data->dev_conf.rx_adv_conf.rss_conf.rss_key :
 356                rss_hash_default_key,
 357                rss_hash_default_key_len);
 358         priv->rss_conf.rss_key_len = rss_hash_default_key_len;
 359         priv->rss_conf.rss_hf = dev->data->dev_conf.rx_adv_conf.rss_conf.rss_hf;
 360         priv->rxqs = (void *)dev->data->rx_queues;
 361         priv->txqs = (void *)dev->data->tx_queues;
 362         if (txqs_n != priv->txqs_n) {
 363                 DRV_LOG(INFO, "port %u Tx queues number update: %u -> %u",
 364                         dev->data->port_id, priv->txqs_n, txqs_n);
 365                 priv->txqs_n = txqs_n;
 366         }
 367         if (rxqs_n > priv->config.ind_table_max_size) {
 368                 DRV_LOG(ERR, "port %u cannot handle this many Rx queues (%u)",
 369                         dev->data->port_id, rxqs_n);
 370                 rte_errno = EINVAL;
 371                 return -rte_errno;
 372         }
 373         if (rxqs_n == priv->rxqs_n)
 374                 return 0;
 375         DRV_LOG(INFO, "port %u Rx queues number update: %u -> %u",
 376                 dev->data->port_id, priv->rxqs_n, rxqs_n);
 377         priv->rxqs_n = rxqs_n;
 378         /* If the requested number of RX queues is not a power of two, use the
 379          * maximum indirection table size for better balancing.
 380          * The result is always rounded to the next power of two. */
 381         reta_idx_n = (1 << log2above((rxqs_n & (rxqs_n - 1)) ?
 382                                      priv->config.ind_table_max_size :
 383                                      rxqs_n));
 384         ret = mlx5_rss_reta_index_resize(dev, reta_idx_n);
 385         if (ret)
 386                 return ret;
 387         /* When the number of RX queues is not a power of two, the remaining
 388          * table entries are padded with reused WQs and hashes are not spread
 389          * uniformly. */
 390         for (i = 0, j = 0; (i != reta_idx_n); ++i) {
 391                 (*priv->reta_idx)[i] = j;
 392                 if (++j == rxqs_n)
 393                         j = 0;
 394         }
 395         return 0;
 396 }
 397
 398 /**
 399  * Sets default tuning parameters.
 400  *
 401  * @param dev
 402  *   Pointer to Ethernet device.
 403  * @param[out] info
 404  *   Info structure output buffer.
 405  */
 406 static void
 407 mlx5_set_default_params(struct rte_eth_dev *dev, struct rte_eth_dev_info *info)
 408 {
 409         struct priv *priv = dev->data->dev_private;
 410
 411         /* Minimum CPU utilization. */
 412         info->default_rxportconf.ring_size = 256;
 413         info->default_txportconf.ring_size = 256;
 414         info->default_rxportconf.burst_size = 64;
 415         info->default_txportconf.burst_size = 64;
 416         if (priv->link_speed_capa & ETH_LINK_SPEED_100G) {
 417                 info->default_rxportconf.nb_queues = 16;
 418                 info->default_txportconf.nb_queues = 16;
 419                 if (dev->data->nb_rx_queues > 2 ||
 420                     dev->data->nb_tx_queues > 2) {
 421                         /* Max Throughput. */
 422                         info->default_rxportconf.ring_size = 2048;
 423                         info->default_txportconf.ring_size = 2048;
 424                 }
 425         } else {
 426                 info->default_rxportconf.nb_queues = 8;
 427                 info->default_txportconf.nb_queues = 8;
 428                 if (dev->data->nb_rx_queues > 2 ||
 429                     dev->data->nb_tx_queues > 2) {
 430                         /* Max Throughput. */
 431                         info->default_rxportconf.ring_size = 4096;
 432                         info->default_txportconf.ring_size = 4096;
 433                 }
 434         }
 435 }
 436
 437 /**
 438  * DPDK callback to get information about the device.
 439  *
 440  * @param dev
 441  *   Pointer to Ethernet device structure.
 442  * @param[out] info
 443  *   Info structure output buffer.
 444  */
 445 void
 446 mlx5_dev_infos_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *info)
 447 {
 448         struct priv *priv = dev->data->dev_private;
 449         struct mlx5_dev_config *config = &priv->config;
 450         unsigned int max;
 451         char ifname[IF_NAMESIZE];
 452
 453         /* FIXME: we should ask the device for these values. */
 454         info->min_rx_bufsize = 32;
 455         info->max_rx_pktlen = 65536;
 456         /*
 457          * Since we need one CQ per QP, the limit is the minimum number
 458          * between the two values.
 459          */
 460         max = RTE_MIN(priv->device_attr.orig_attr.max_cq,
 461                       priv->device_attr.orig_attr.max_qp);
 462         /* If max >= 65535 then max = 0, max_rx_queues is uint16_t. */
 463         if (max >= 65535)
 464                 max = 65535;
 465         info->max_rx_queues = max;
 466         info->max_tx_queues = max;
 467         info->max_mac_addrs = MLX5_MAX_UC_MAC_ADDRESSES;
 468         info->rx_queue_offload_capa = mlx5_get_rx_queue_offloads(dev);
 469         info->rx_offload_capa = (mlx5_get_rx_port_offloads() |
 470                                  info->rx_queue_offload_capa);
 471         info->tx_offload_capa = mlx5_get_tx_port_offloads(dev);
 472         if (mlx5_get_ifname(dev, &ifname) == 0)
 473                 info->if_index = if_nametoindex(ifname);
 474         info->reta_size = priv->reta_idx_n ?
 475                 priv->reta_idx_n : config->ind_table_max_size;
 476         info->hash_key_size = rss_hash_default_key_len;
 477         info->speed_capa = priv->link_speed_capa;
 478         info->flow_type_rss_offloads = ~MLX5_RSS_HF_MASK;
 479         mlx5_set_default_params(dev, info);
 480 }
 481
 482 /**
 483  * Get supported packet types.
 484  *
 485  * @param dev
 486  *   Pointer to Ethernet device structure.
 487  *
 488  * @return
 489  *   A pointer to the supported Packet types array.
 490  */
 491 const uint32_t *
 492 mlx5_dev_supported_ptypes_get(struct rte_eth_dev *dev)
 493 {
 494         static const uint32_t ptypes[] = {
 495                 /* refers to rxq_cq_to_pkt_type() */
 496                 RTE_PTYPE_L2_ETHER,
 497                 RTE_PTYPE_L3_IPV4_EXT_UNKNOWN,
 498                 RTE_PTYPE_L3_IPV6_EXT_UNKNOWN,
 499                 RTE_PTYPE_L4_NONFRAG,
 500                 RTE_PTYPE_L4_FRAG,
 501                 RTE_PTYPE_L4_TCP,
 502                 RTE_PTYPE_L4_UDP,
 503                 RTE_PTYPE_INNER_L3_IPV4_EXT_UNKNOWN,
 504                 RTE_PTYPE_INNER_L3_IPV6_EXT_UNKNOWN,
 505                 RTE_PTYPE_INNER_L4_NONFRAG,
 506                 RTE_PTYPE_INNER_L4_FRAG,
 507                 RTE_PTYPE_INNER_L4_TCP,
 508                 RTE_PTYPE_INNER_L4_UDP,
 509                 RTE_PTYPE_UNKNOWN
 510         };
 511
 512         if (dev->rx_pkt_burst == mlx5_rx_burst ||
 513             dev->rx_pkt_burst == mlx5_rx_burst_mprq ||
 514             dev->rx_pkt_burst == mlx5_rx_burst_vec)
 515                 return ptypes;
 516         return NULL;
 517 }
 518
 519 /**
 520  * DPDK callback to retrieve physical link information.
 521  *
 522  * @param dev
 523  *   Pointer to Ethernet device structure.
 524  * @param[out] link
 525  *   Storage for current link status.
 526  *
 527  * @return
 528  *   0 on success, a negative errno value otherwise and rte_errno is set.
 529  */
 530 static int
 531 mlx5_link_update_unlocked_gset(struct rte_eth_dev *dev,
 532                                struct rte_eth_link *link)
 533 {
 534         struct priv *priv = dev->data->dev_private;
 535         struct ethtool_cmd edata = {
 536                 .cmd = ETHTOOL_GSET /* Deprecated since Linux v4.5. */
 537         };
 538         struct ifreq ifr;
 539         struct rte_eth_link dev_link;
 540         int link_speed = 0;
 541         int ret;
 542
 543         ret = mlx5_ifreq(dev, SIOCGIFFLAGS, &ifr);
 544         if (ret) {
 545                 DRV_LOG(WARNING, "port %u ioctl(SIOCGIFFLAGS) failed: %s",
 546                         dev->data->port_id, strerror(rte_errno));
 547                 return ret;
 548         }
 549         memset(&dev_link, 0, sizeof(dev_link));
 550         dev_link.link_status = ((ifr.ifr_flags & IFF_UP) &&
 551                                 (ifr.ifr_flags & IFF_RUNNING));
 552         ifr.ifr_data = (void *)&edata;
 553         ret = mlx5_ifreq(dev, SIOCETHTOOL, &ifr);
 554         if (ret) {
 555                 DRV_LOG(WARNING,
 556                         "port %u ioctl(SIOCETHTOOL, ETHTOOL_GSET) failed: %s",
 557                         dev->data->port_id, strerror(rte_errno));
 558                 return ret;
 559         }
 560         link_speed = ethtool_cmd_speed(&edata);
 561         if (link_speed == -1)
 562                 dev_link.link_speed = ETH_SPEED_NUM_NONE;
 563         else
 564                 dev_link.link_speed = link_speed;
 565         priv->link_speed_capa = 0;
 566         if (edata.supported & SUPPORTED_Autoneg)
 567                 priv->link_speed_capa |= ETH_LINK_SPEED_AUTONEG;
 568         if (edata.supported & (SUPPORTED_1000baseT_Full |
 569                                SUPPORTED_1000baseKX_Full))
 570                 priv->link_speed_capa |= ETH_LINK_SPEED_1G;
 571         if (edata.supported & SUPPORTED_10000baseKR_Full)
 572                 priv->link_speed_capa |= ETH_LINK_SPEED_10G;
 573         if (edata.supported & (SUPPORTED_40000baseKR4_Full |
 574                                SUPPORTED_40000baseCR4_Full |
 575                                SUPPORTED_40000baseSR4_Full |
 576                                SUPPORTED_40000baseLR4_Full))
 577                 priv->link_speed_capa |= ETH_LINK_SPEED_40G;
 578         dev_link.link_duplex = ((edata.duplex == DUPLEX_HALF) ?
 579                                 ETH_LINK_HALF_DUPLEX : ETH_LINK_FULL_DUPLEX);
 580         dev_link.link_autoneg = !(dev->data->dev_conf.link_speeds &
 581                         ETH_LINK_SPEED_FIXED);
 582         if ((dev_link.link_speed && !dev_link.link_status) ||
 583             (!dev_link.link_speed && dev_link.link_status)) {
 584                 rte_errno = EAGAIN;
 585                 return -rte_errno;
 586         }
 587         *link = dev_link;
 588         return 0;
 589 }
 590
 591 /**
 592  * Retrieve physical link information (unlocked version using new ioctl).
 593  *
 594  * @param dev
 595  *   Pointer to Ethernet device structure.
 596  * @param[out] link
 597  *   Storage for current link status.
 598  *
 599  * @return
 600  *   0 on success, a negative errno value otherwise and rte_errno is set.
 601  */
 602 static int
 603 mlx5_link_update_unlocked_gs(struct rte_eth_dev *dev,
 604                              struct rte_eth_link *link)
 605
 606 {
 607         struct priv *priv = dev->data->dev_private;
 608         struct ethtool_link_settings gcmd = { .cmd = ETHTOOL_GLINKSETTINGS };
 609         struct ifreq ifr;
 610         struct rte_eth_link dev_link;
 611         uint64_t sc;
 612         int ret;
 613
 614         ret = mlx5_ifreq(dev, SIOCGIFFLAGS, &ifr);
 615         if (ret) {
 616                 DRV_LOG(WARNING, "port %u ioctl(SIOCGIFFLAGS) failed: %s",
 617                         dev->data->port_id, strerror(rte_errno));
 618                 return ret;
 619         }
 620         memset(&dev_link, 0, sizeof(dev_link));
 621         dev_link.link_status = ((ifr.ifr_flags & IFF_UP) &&
 622                                 (ifr.ifr_flags & IFF_RUNNING));
 623         ifr.ifr_data = (void *)&gcmd;
 624         ret = mlx5_ifreq(dev, SIOCETHTOOL, &ifr);
 625         if (ret) {
 626                 DRV_LOG(DEBUG,
 627                         "port %u ioctl(SIOCETHTOOL, ETHTOOL_GLINKSETTINGS)"
 628                         " failed: %s",
 629                         dev->data->port_id, strerror(rte_errno));
 630                 return ret;
 631         }
 632         gcmd.link_mode_masks_nwords = -gcmd.link_mode_masks_nwords;
 633
 634         alignas(struct ethtool_link_settings)
 635         uint8_t data[offsetof(struct ethtool_link_settings, link_mode_masks) +
 636                      sizeof(uint32_t) * gcmd.link_mode_masks_nwords * 3];
 637         struct ethtool_link_settings *ecmd = (void *)data;
 638
 639         *ecmd = gcmd;
 640         ifr.ifr_data = (void *)ecmd;
 641         ret = mlx5_ifreq(dev, SIOCETHTOOL, &ifr);
 642         if (ret) {
 643                 DRV_LOG(DEBUG,
 644                         "port %u ioctl(SIOCETHTOOL, ETHTOOL_GLINKSETTINGS)"
 645                         " failed: %s",
 646                         dev->data->port_id, strerror(rte_errno));
 647                 return ret;
 648         }
 649         dev_link.link_speed = ecmd->speed;
 650         sc = ecmd->link_mode_masks[0] |
 651                 ((uint64_t)ecmd->link_mode_masks[1] << 32);
 652         priv->link_speed_capa = 0;
 653         if (sc & MLX5_BITSHIFT(ETHTOOL_LINK_MODE_Autoneg_BIT))
 654                 priv->link_speed_capa |= ETH_LINK_SPEED_AUTONEG;
 655         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_1000baseT_Full_BIT) |
 656                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_1000baseKX_Full_BIT)))
 657                 priv->link_speed_capa |= ETH_LINK_SPEED_1G;
 658         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT) |
 659                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT) |
 660                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_10000baseR_FEC_BIT)))
 661                 priv->link_speed_capa |= ETH_LINK_SPEED_10G;
 662         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_20000baseMLD2_Full_BIT) |
 663                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_20000baseKR2_Full_BIT)))
 664                 priv->link_speed_capa |= ETH_LINK_SPEED_20G;
 665         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT) |
 666                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT) |
 667                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT) |
 668                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT)))
 669                 priv->link_speed_capa |= ETH_LINK_SPEED_40G;
 670         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_56000baseKR4_Full_BIT) |
 671                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_56000baseCR4_Full_BIT) |
 672                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_56000baseSR4_Full_BIT) |
 673                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_56000baseLR4_Full_BIT)))
 674                 priv->link_speed_capa |= ETH_LINK_SPEED_56G;
 675         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_25000baseCR_Full_BIT) |
 676                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_25000baseKR_Full_BIT) |
 677                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_25000baseSR_Full_BIT)))
 678                 priv->link_speed_capa |= ETH_LINK_SPEED_25G;
 679         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT) |
 680                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT)))
 681                 priv->link_speed_capa |= ETH_LINK_SPEED_50G;
 682         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT) |
 683                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT) |
 684                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT) |
 685                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT)))
 686                 priv->link_speed_capa |= ETH_LINK_SPEED_100G;
 687         dev_link.link_duplex = ((ecmd->duplex == DUPLEX_HALF) ?
 688                                 ETH_LINK_HALF_DUPLEX : ETH_LINK_FULL_DUPLEX);
 689         dev_link.link_autoneg = !(dev->data->dev_conf.link_speeds &
 690                                   ETH_LINK_SPEED_FIXED);
 691         if ((dev_link.link_speed && !dev_link.link_status) ||
 692             (!dev_link.link_speed && dev_link.link_status)) {
 693                 rte_errno = EAGAIN;
 694                 return -rte_errno;
 695         }
 696         *link = dev_link;
 697         return 0;
 698 }
 699
 700 /**
 701  * DPDK callback to retrieve physical link information.
 702  *
 703  * @param dev
 704  *   Pointer to Ethernet device structure.
 705  * @param wait_to_complete
 706  *   Wait for request completion.
 707  *
 708  * @return
 709  *   0 if link status was not updated, positive if it was, a negative errno
 710  *   value otherwise and rte_errno is set.
 711  */
 712 int
 713 mlx5_link_update(struct rte_eth_dev *dev, int wait_to_complete)
 714 {
 715         int ret;
 716         struct rte_eth_link dev_link;
 717         time_t start_time = time(NULL);
 718
 719         do {
 720                 ret = mlx5_link_update_unlocked_gs(dev, &dev_link);
 721                 if (ret)
 722                         ret = mlx5_link_update_unlocked_gset(dev, &dev_link);
 723                 if (ret == 0)
 724                         break;
 725                 /* Handle wait to complete situation. */
 726                 if (wait_to_complete && ret == -EAGAIN) {
 727                         if (abs((int)difftime(time(NULL), start_time)) <
 728                             MLX5_LINK_STATUS_TIMEOUT) {
 729                                 usleep(0);
 730                                 continue;
 731                         } else {
 732                                 rte_errno = EBUSY;
 733                                 return -rte_errno;
 734                         }
 735                 } else if (ret < 0) {
 736                         return ret;
 737                 }
 738         } while (wait_to_complete);
 739         ret = !!memcmp(&dev->data->dev_link, &dev_link,
 740                        sizeof(struct rte_eth_link));
 741         dev->data->dev_link = dev_link;
 742         return ret;
 743 }
 744
 745 /**
 746  * DPDK callback to change the MTU.
 747  *
 748  * @param dev
 749  *   Pointer to Ethernet device structure.
 750  * @param in_mtu
 751  *   New MTU.
 752  *
 753  * @return
 754  *   0 on success, a negative errno value otherwise and rte_errno is set.
 755  */
 756 int
 757 mlx5_dev_set_mtu(struct rte_eth_dev *dev, uint16_t mtu)
 758 {
 759         struct priv *priv = dev->data->dev_private;
 760         uint16_t kern_mtu = 0;
 761         int ret;
 762
 763         ret = mlx5_get_mtu(dev, &kern_mtu);
 764         if (ret)
 765                 return ret;
 766         /* Set kernel interface MTU first. */
 767         ret = mlx5_set_mtu(dev, mtu);
 768         if (ret)
 769                 return ret;
 770         ret = mlx5_get_mtu(dev, &kern_mtu);
 771         if (ret)
 772                 return ret;
 773         if (kern_mtu == mtu) {
 774                 priv->mtu = mtu;
 775                 DRV_LOG(DEBUG, "port %u adapter MTU set to %u",
 776                         dev->data->port_id, mtu);
 777                 return 0;
 778         }
 779         rte_errno = EAGAIN;
 780         return -rte_errno;
 781 }
 782
 783 /**
 784  * DPDK callback to get flow control status.
 785  *
 786  * @param dev
 787  *   Pointer to Ethernet device structure.
 788  * @param[out] fc_conf
 789  *   Flow control output buffer.
 790  *
 791  * @return
 792  *   0 on success, a negative errno value otherwise and rte_errno is set.
 793  */
 794 int
 795 mlx5_dev_get_flow_ctrl(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
 796 {
 797         struct ifreq ifr;
 798         struct ethtool_pauseparam ethpause = {
 799                 .cmd = ETHTOOL_GPAUSEPARAM
 800         };
 801         int ret;
 802
 803         ifr.ifr_data = (void *)&ethpause;
 804         ret = mlx5_ifreq(dev, SIOCETHTOOL, &ifr);
 805         if (ret) {
 806                 DRV_LOG(WARNING,
 807                         "port %u ioctl(SIOCETHTOOL, ETHTOOL_GPAUSEPARAM) failed:"
 808                         " %s",
 809                         dev->data->port_id, strerror(rte_errno));
 810                 return ret;
 811         }
 812         fc_conf->autoneg = ethpause.autoneg;
 813         if (ethpause.rx_pause && ethpause.tx_pause)
 814                 fc_conf->mode = RTE_FC_FULL;
 815         else if (ethpause.rx_pause)
 816                 fc_conf->mode = RTE_FC_RX_PAUSE;
 817         else if (ethpause.tx_pause)
 818                 fc_conf->mode = RTE_FC_TX_PAUSE;
 819         else
 820                 fc_conf->mode = RTE_FC_NONE;
 821         return 0;
 822 }
 823
 824 /**
 825  * DPDK callback to modify flow control parameters.
 826  *
 827  * @param dev
 828  *   Pointer to Ethernet device structure.
 829  * @param[in] fc_conf
 830  *   Flow control parameters.
 831  *
 832  * @return
 833  *   0 on success, a negative errno value otherwise and rte_errno is set.
 834  */
 835 int
 836 mlx5_dev_set_flow_ctrl(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
 837 {
 838         struct ifreq ifr;
 839         struct ethtool_pauseparam ethpause = {
 840                 .cmd = ETHTOOL_SPAUSEPARAM
 841         };
 842         int ret;
 843
 844         ifr.ifr_data = (void *)&ethpause;
 845         ethpause.autoneg = fc_conf->autoneg;
 846         if (((fc_conf->mode & RTE_FC_FULL) == RTE_FC_FULL) ||
 847             (fc_conf->mode & RTE_FC_RX_PAUSE))
 848                 ethpause.rx_pause = 1;
 849         else
 850                 ethpause.rx_pause = 0;
 851
 852         if (((fc_conf->mode & RTE_FC_FULL) == RTE_FC_FULL) ||
 853             (fc_conf->mode & RTE_FC_TX_PAUSE))
 854                 ethpause.tx_pause = 1;
 855         else
 856                 ethpause.tx_pause = 0;
 857         ret = mlx5_ifreq(dev, SIOCETHTOOL, &ifr);
 858         if (ret) {
 859                 DRV_LOG(WARNING,
 860                         "port %u ioctl(SIOCETHTOOL, ETHTOOL_SPAUSEPARAM)"
 861                         " failed: %s",
 862                         dev->data->port_id, strerror(rte_errno));
 863                 return ret;
 864         }
 865         return 0;
 866 }
 867
 868 /**
 869  * Get PCI information from struct ibv_device.
 870  *
 871  * @param device
 872  *   Pointer to Ethernet device structure.
 873  * @param[out] pci_addr
 874  *   PCI bus address output buffer.
 875  *
 876  * @return
 877  *   0 on success, a negative errno value otherwise and rte_errno is set.
 878  */
 879 int
 880 mlx5_ibv_device_to_pci_addr(const struct ibv_device *device,
 881                             struct rte_pci_addr *pci_addr)
 882 {
 883         FILE *file;
 884         char line[32];
 885         MKSTR(path, "%s/device/uevent", device->ibdev_path);
 886
 887         file = fopen(path, "rb");
 888         if (file == NULL) {
 889                 rte_errno = errno;
 890                 return -rte_errno;
 891         }
 892         while (fgets(line, sizeof(line), file) == line) {
 893                 size_t len = strlen(line);
 894                 int ret;
 895
 896                 /* Truncate long lines. */
 897                 if (len == (sizeof(line) - 1))
 898                         while (line[(len - 1)] != '\n') {
 899                                 ret = fgetc(file);
 900                                 if (ret == EOF)
 901                                         break;
 902                                 line[(len - 1)] = ret;
 903                         }
 904                 /* Extract information. */
 905                 if (sscanf(line,
 906                            "PCI_SLOT_NAME="
 907                            "%" SCNx32 ":%" SCNx8 ":%" SCNx8 ".%" SCNx8 "\n",
 908                            &pci_addr->domain,
 909                            &pci_addr->bus,
 910                            &pci_addr->devid,
 911                            &pci_addr->function) == 4) {
 912                         ret = 0;
 913                         break;
 914                 }
 915         }
 916         fclose(file);
 917         return 0;
 918 }
 919
 920 /**
 921  * Device status handler.
 922  *
 923  * @param dev
 924  *   Pointer to Ethernet device.
 925  * @param events
 926  *   Pointer to event flags holder.
 927  *
 928  * @return
 929  *   Events bitmap of callback process which can be called immediately.
 930  */
 931 static uint32_t
 932 mlx5_dev_status_handler(struct rte_eth_dev *dev)
 933 {
 934         struct priv *priv = dev->data->dev_private;
 935         struct ibv_async_event event;
 936         uint32_t ret = 0;
 937
 938         if (mlx5_link_update(dev, 0) == -EAGAIN) {
 939                 usleep(0);
 940                 return 0;
 941         }
 942         /* Read all message and acknowledge them. */
 943         for (;;) {
 944                 if (mlx5_glue->get_async_event(priv->ctx, &event))
 945                         break;
 946                 if ((event.event_type == IBV_EVENT_PORT_ACTIVE ||
 947                         event.event_type == IBV_EVENT_PORT_ERR) &&
 948                         (dev->data->dev_conf.intr_conf.lsc == 1))
 949                         ret |= (1 << RTE_ETH_EVENT_INTR_LSC);
 950                 else if (event.event_type == IBV_EVENT_DEVICE_FATAL &&
 951                         dev->data->dev_conf.intr_conf.rmv == 1)
 952                         ret |= (1 << RTE_ETH_EVENT_INTR_RMV);
 953                 else
 954                         DRV_LOG(DEBUG,
 955                                 "port %u event type %d on not handled",
 956                                 dev->data->port_id, event.event_type);
 957                 mlx5_glue->ack_async_event(&event);
 958         }
 959         return ret;
 960 }
 961
 962 /**
 963  * Handle interrupts from the NIC.
 964  *
 965  * @param[in] intr_handle
 966  *   Interrupt handler.
 967  * @param cb_arg
 968  *   Callback argument.
 969  */
 970 void
 971 mlx5_dev_interrupt_handler(void *cb_arg)
 972 {
 973         struct rte_eth_dev *dev = cb_arg;
 974         uint32_t events;
 975
 976         events = mlx5_dev_status_handler(dev);
 977         if (events & (1 << RTE_ETH_EVENT_INTR_LSC))
 978                 _rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL);
 979         if (events & (1 << RTE_ETH_EVENT_INTR_RMV))
 980                 _rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_RMV, NULL);
 981 }
 982
 983 /**
 984  * Handle interrupts from the socket.
 985  *
 986  * @param cb_arg
 987  *   Callback argument.
 988  */
 989 static void
 990 mlx5_dev_handler_socket(void *cb_arg)
 991 {
 992         struct rte_eth_dev *dev = cb_arg;
 993
 994         mlx5_socket_handle(dev);
 995 }
 996
 997 /**
 998  * Uninstall interrupt handler.
 999  *
1000  * @param dev
1001  *   Pointer to Ethernet device.
1002  */
1003 void
1004 mlx5_dev_interrupt_handler_uninstall(struct rte_eth_dev *dev)
1005 {
1006         struct priv *priv = dev->data->dev_private;
1007
1008         if (dev->data->dev_conf.intr_conf.lsc ||
1009             dev->data->dev_conf.intr_conf.rmv)
1010                 rte_intr_callback_unregister(&priv->intr_handle,
1011                                              mlx5_dev_interrupt_handler, dev);
1012         if (priv->primary_socket)
1013                 rte_intr_callback_unregister(&priv->intr_handle_socket,
1014                                              mlx5_dev_handler_socket, dev);
1015         priv->intr_handle.fd = 0;
1016         priv->intr_handle.type = RTE_INTR_HANDLE_UNKNOWN;
1017         priv->intr_handle_socket.fd = 0;
1018         priv->intr_handle_socket.type = RTE_INTR_HANDLE_UNKNOWN;
1019 }
1020
1021 /**
1022  * Install interrupt handler.
1023  *
1024  * @param dev
1025  *   Pointer to Ethernet device.
1026  */
1027 void
1028 mlx5_dev_interrupt_handler_install(struct rte_eth_dev *dev)
1029 {
1030         struct priv *priv = dev->data->dev_private;
1031         int ret;
1032         int flags;
1033
1034         assert(priv->ctx->async_fd > 0);
1035         flags = fcntl(priv->ctx->async_fd, F_GETFL);
1036         ret = fcntl(priv->ctx->async_fd, F_SETFL, flags | O_NONBLOCK);
1037         if (ret) {
1038                 DRV_LOG(INFO,
1039                         "port %u failed to change file descriptor async event"
1040                         " queue",
1041                         dev->data->port_id);
1042                 dev->data->dev_conf.intr_conf.lsc = 0;
1043                 dev->data->dev_conf.intr_conf.rmv = 0;
1044         }
1045         if (dev->data->dev_conf.intr_conf.lsc ||
1046             dev->data->dev_conf.intr_conf.rmv) {
1047                 priv->intr_handle.fd = priv->ctx->async_fd;
1048                 priv->intr_handle.type = RTE_INTR_HANDLE_EXT;
1049                 rte_intr_callback_register(&priv->intr_handle,
1050                                            mlx5_dev_interrupt_handler, dev);
1051         }
1052         ret = mlx5_socket_init(dev);
1053         if (ret)
1054                 DRV_LOG(ERR, "port %u cannot initialise socket: %s",
1055                         dev->data->port_id, strerror(rte_errno));
1056         else if (priv->primary_socket) {
1057                 priv->intr_handle_socket.fd = priv->primary_socket;
1058                 priv->intr_handle_socket.type = RTE_INTR_HANDLE_EXT;
1059                 rte_intr_callback_register(&priv->intr_handle_socket,
1060                                            mlx5_dev_handler_socket, dev);
1061         }
1062 }
1063
1064 /**
1065  * DPDK callback to bring the link DOWN.
1066  *
1067  * @param dev
1068  *   Pointer to Ethernet device structure.
1069  *
1070  * @return
1071  *   0 on success, a negative errno value otherwise and rte_errno is set.
1072  */
1073 int
1074 mlx5_set_link_down(struct rte_eth_dev *dev)
1075 {
1076         return mlx5_set_flags(dev, ~IFF_UP, ~IFF_UP);
1077 }
1078
1079 /**
1080  * DPDK callback to bring the link UP.
1081  *
1082  * @param dev
1083  *   Pointer to Ethernet device structure.
1084  *
1085  * @return
1086  *   0 on success, a negative errno value otherwise and rte_errno is set.
1087  */
1088 int
1089 mlx5_set_link_up(struct rte_eth_dev *dev)
1090 {
1091         return mlx5_set_flags(dev, ~IFF_UP, IFF_UP);
1092 }
1093
1094 /**
1095  * Configure the TX function to use.
1096  *
1097  * @param dev
1098  *   Pointer to private data structure.
1099  *
1100  * @return
1101  *   Pointer to selected Tx burst function.
1102  */
1103 eth_tx_burst_t
1104 mlx5_select_tx_function(struct rte_eth_dev *dev)
1105 {
1106         struct priv *priv = dev->data->dev_private;
1107         eth_tx_burst_t tx_pkt_burst = mlx5_tx_burst;
1108         struct mlx5_dev_config *config = &priv->config;
1109         uint64_t tx_offloads = dev->data->dev_conf.txmode.offloads;
1110         int tso = !!(tx_offloads & (DEV_TX_OFFLOAD_TCP_TSO |
1111                                     DEV_TX_OFFLOAD_VXLAN_TNL_TSO |
1112                                     DEV_TX_OFFLOAD_GRE_TNL_TSO |
1113                                     DEV_TX_OFFLOAD_IP_TNL_TSO |
1114                                     DEV_TX_OFFLOAD_UDP_TNL_TSO));
1115         int swp = !!(tx_offloads & (DEV_TX_OFFLOAD_IP_TNL_TSO |
1116                                     DEV_TX_OFFLOAD_UDP_TNL_TSO |
1117                                     DEV_TX_OFFLOAD_OUTER_IPV4_CKSUM));
1118         int vlan_insert = !!(tx_offloads & DEV_TX_OFFLOAD_VLAN_INSERT);
1119
1120         assert(priv != NULL);
1121         /* Select appropriate TX function. */
1122         if (vlan_insert || tso || swp)
1123                 return tx_pkt_burst;
1124         if (config->mps == MLX5_MPW_ENHANCED) {
1125                 if (mlx5_check_vec_tx_support(dev) > 0) {
1126                         if (mlx5_check_raw_vec_tx_support(dev) > 0)
1127                                 tx_pkt_burst = mlx5_tx_burst_raw_vec;
1128                         else
1129                                 tx_pkt_burst = mlx5_tx_burst_vec;
1130                         DRV_LOG(DEBUG,
1131                                 "port %u selected enhanced MPW Tx vectorized"
1132                                 " function",
1133                                 dev->data->port_id);
1134                 } else {
1135                         tx_pkt_burst = mlx5_tx_burst_empw;
1136                         DRV_LOG(DEBUG,
1137                                 "port %u selected enhanced MPW Tx function",
1138                                 dev->data->port_id);
1139                 }
1140         } else if (config->mps && (config->txq_inline > 0)) {
1141                 tx_pkt_burst = mlx5_tx_burst_mpw_inline;
1142                 DRV_LOG(DEBUG, "port %u selected MPW inline Tx function",
1143                         dev->data->port_id);
1144         } else if (config->mps) {
1145                 tx_pkt_burst = mlx5_tx_burst_mpw;
1146                 DRV_LOG(DEBUG, "port %u selected MPW Tx function",
1147                         dev->data->port_id);
1148         }
1149         return tx_pkt_burst;
1150 }
1151
1152 /**
1153  * Configure the RX function to use.
1154  *
1155  * @param dev
1156  *   Pointer to private data structure.
1157  *
1158  * @return
1159  *   Pointer to selected Rx burst function.
1160  */
1161 eth_rx_burst_t
1162 mlx5_select_rx_function(struct rte_eth_dev *dev)
1163 {
1164         eth_rx_burst_t rx_pkt_burst = mlx5_rx_burst;
1165
1166         assert(dev != NULL);
1167         if (mlx5_check_vec_rx_support(dev) > 0) {
1168                 rx_pkt_burst = mlx5_rx_burst_vec;
1169                 DRV_LOG(DEBUG, "port %u selected Rx vectorized function",
1170                         dev->data->port_id);
1171         } else if (mlx5_mprq_enabled(dev)) {
1172                 rx_pkt_burst = mlx5_rx_burst_mprq;
1173         }
1174         return rx_pkt_burst;
1175 }
1176
1177 /**
1178  * Check if mlx5 device was removed.
1179  *
1180  * @param dev
1181  *   Pointer to Ethernet device structure.
1182  *
1183  * @return
1184  *   1 when device is removed, otherwise 0.
1185  */
1186 int
1187 mlx5_is_removed(struct rte_eth_dev *dev)
1188 {
1189         struct ibv_device_attr device_attr;
1190         struct priv *priv = dev->data->dev_private;
1191
1192         if (mlx5_glue->query_device(priv->ctx, &device_attr) == EIO)
1193                 return 1;
1194         return 0;
1195 }