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         uint64_t supp_tx_offloads = mlx5_get_tx_port_offloads(dev);
 334         uint64_t tx_offloads = dev->data->dev_conf.txmode.offloads;
 335         uint64_t supp_rx_offloads =
 336                 (mlx5_get_rx_port_offloads() |
 337                  mlx5_get_rx_queue_offloads(dev));
 338         uint64_t rx_offloads = dev->data->dev_conf.rxmode.offloads;
 339         int ret = 0;
 340
 341         if ((tx_offloads & supp_tx_offloads) != tx_offloads) {
 342                 DRV_LOG(ERR,
 343                         "port %u some Tx offloads are not supported requested"
 344                         " 0x%" PRIx64 " supported 0x%" PRIx64,
 345                         dev->data->port_id, tx_offloads, supp_tx_offloads);
 346                 rte_errno = ENOTSUP;
 347                 return -rte_errno;
 348         }
 349         if ((rx_offloads & supp_rx_offloads) != rx_offloads) {
 350                 DRV_LOG(ERR,
 351                         "port %u some Rx offloads are not supported requested"
 352                         " 0x%" PRIx64 " supported 0x%" PRIx64,
 353                         dev->data->port_id, rx_offloads, supp_rx_offloads);
 354                 rte_errno = ENOTSUP;
 355                 return -rte_errno;
 356         }
 357         if (use_app_rss_key &&
 358             (dev->data->dev_conf.rx_adv_conf.rss_conf.rss_key_len !=
 359              rss_hash_default_key_len)) {
 360                 DRV_LOG(ERR, "port %u RSS key len must be %zu Bytes long",
 361                         dev->data->port_id, rss_hash_default_key_len);
 362                 rte_errno = EINVAL;
 363                 return -rte_errno;
 364         }
 365         priv->rss_conf.rss_key =
 366                 rte_realloc(priv->rss_conf.rss_key,
 367                             rss_hash_default_key_len, 0);
 368         if (!priv->rss_conf.rss_key) {
 369                 DRV_LOG(ERR, "port %u cannot allocate RSS hash key memory (%u)",
 370                         dev->data->port_id, rxqs_n);
 371                 rte_errno = ENOMEM;
 372                 return -rte_errno;
 373         }
 374         memcpy(priv->rss_conf.rss_key,
 375                use_app_rss_key ?
 376                dev->data->dev_conf.rx_adv_conf.rss_conf.rss_key :
 377                rss_hash_default_key,
 378                rss_hash_default_key_len);
 379         priv->rss_conf.rss_key_len = rss_hash_default_key_len;
 380         priv->rss_conf.rss_hf = dev->data->dev_conf.rx_adv_conf.rss_conf.rss_hf;
 381         priv->rxqs = (void *)dev->data->rx_queues;
 382         priv->txqs = (void *)dev->data->tx_queues;
 383         if (txqs_n != priv->txqs_n) {
 384                 DRV_LOG(INFO, "port %u Tx queues number update: %u -> %u",
 385                         dev->data->port_id, priv->txqs_n, txqs_n);
 386                 priv->txqs_n = txqs_n;
 387         }
 388         if (rxqs_n > priv->config.ind_table_max_size) {
 389                 DRV_LOG(ERR, "port %u cannot handle this many Rx queues (%u)",
 390                         dev->data->port_id, rxqs_n);
 391                 rte_errno = EINVAL;
 392                 return -rte_errno;
 393         }
 394         if (rxqs_n == priv->rxqs_n)
 395                 return 0;
 396         DRV_LOG(INFO, "port %u Rx queues number update: %u -> %u",
 397                 dev->data->port_id, priv->rxqs_n, rxqs_n);
 398         priv->rxqs_n = rxqs_n;
 399         /* If the requested number of RX queues is not a power of two, use the
 400          * maximum indirection table size for better balancing.
 401          * The result is always rounded to the next power of two. */
 402         reta_idx_n = (1 << log2above((rxqs_n & (rxqs_n - 1)) ?
 403                                      priv->config.ind_table_max_size :
 404                                      rxqs_n));
 405         ret = mlx5_rss_reta_index_resize(dev, reta_idx_n);
 406         if (ret)
 407                 return ret;
 408         /* When the number of RX queues is not a power of two, the remaining
 409          * table entries are padded with reused WQs and hashes are not spread
 410          * uniformly. */
 411         for (i = 0, j = 0; (i != reta_idx_n); ++i) {
 412                 (*priv->reta_idx)[i] = j;
 413                 if (++j == rxqs_n)
 414                         j = 0;
 415         }
 416         return 0;
 417 }
 418
 419 /**
 420  * DPDK callback to get information about the device.
 421  *
 422  * @param dev
 423  *   Pointer to Ethernet device structure.
 424  * @param[out] info
 425  *   Info structure output buffer.
 426  */
 427 void
 428 mlx5_dev_infos_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *info)
 429 {
 430         struct priv *priv = dev->data->dev_private;
 431         struct mlx5_dev_config *config = &priv->config;
 432         unsigned int max;
 433         char ifname[IF_NAMESIZE];
 434
 435         info->pci_dev = RTE_ETH_DEV_TO_PCI(dev);
 436         /* FIXME: we should ask the device for these values. */
 437         info->min_rx_bufsize = 32;
 438         info->max_rx_pktlen = 65536;
 439         /*
 440          * Since we need one CQ per QP, the limit is the minimum number
 441          * between the two values.
 442          */
 443         max = RTE_MIN(priv->device_attr.orig_attr.max_cq,
 444                       priv->device_attr.orig_attr.max_qp);
 445         /* If max >= 65535 then max = 0, max_rx_queues is uint16_t. */
 446         if (max >= 65535)
 447                 max = 65535;
 448         info->max_rx_queues = max;
 449         info->max_tx_queues = max;
 450         info->max_mac_addrs = RTE_DIM(priv->mac);
 451         info->rx_queue_offload_capa = mlx5_get_rx_queue_offloads(dev);
 452         info->rx_offload_capa = (mlx5_get_rx_port_offloads() |
 453                                  info->rx_queue_offload_capa);
 454         info->tx_offload_capa = mlx5_get_tx_port_offloads(dev);
 455         if (mlx5_get_ifname(dev, &ifname) == 0)
 456                 info->if_index = if_nametoindex(ifname);
 457         info->reta_size = priv->reta_idx_n ?
 458                 priv->reta_idx_n : config->ind_table_max_size;
 459         info->hash_key_size = rss_hash_default_key_len;
 460         info->speed_capa = priv->link_speed_capa;
 461         info->flow_type_rss_offloads = ~MLX5_RSS_HF_MASK;
 462 }
 463
 464 /**
 465  * Get supported packet types.
 466  *
 467  * @param dev
 468  *   Pointer to Ethernet device structure.
 469  *
 470  * @return
 471  *   A pointer to the supported Packet types array.
 472  */
 473 const uint32_t *
 474 mlx5_dev_supported_ptypes_get(struct rte_eth_dev *dev)
 475 {
 476         static const uint32_t ptypes[] = {
 477                 /* refers to rxq_cq_to_pkt_type() */
 478                 RTE_PTYPE_L2_ETHER,
 479                 RTE_PTYPE_L3_IPV4_EXT_UNKNOWN,
 480                 RTE_PTYPE_L3_IPV6_EXT_UNKNOWN,
 481                 RTE_PTYPE_L4_NONFRAG,
 482                 RTE_PTYPE_L4_FRAG,
 483                 RTE_PTYPE_L4_TCP,
 484                 RTE_PTYPE_L4_UDP,
 485                 RTE_PTYPE_INNER_L3_IPV4_EXT_UNKNOWN,
 486                 RTE_PTYPE_INNER_L3_IPV6_EXT_UNKNOWN,
 487                 RTE_PTYPE_INNER_L4_NONFRAG,
 488                 RTE_PTYPE_INNER_L4_FRAG,
 489                 RTE_PTYPE_INNER_L4_TCP,
 490                 RTE_PTYPE_INNER_L4_UDP,
 491                 RTE_PTYPE_UNKNOWN
 492         };
 493
 494         if (dev->rx_pkt_burst == mlx5_rx_burst ||
 495             dev->rx_pkt_burst == mlx5_rx_burst_vec)
 496                 return ptypes;
 497         return NULL;
 498 }
 499
 500 /**
 501  * DPDK callback to retrieve physical link information.
 502  *
 503  * @param dev
 504  *   Pointer to Ethernet device structure.
 505  * @param[out] link
 506  *   Storage for current link status.
 507  *
 508  * @return
 509  *   0 on success, a negative errno value otherwise and rte_errno is set.
 510  */
 511 static int
 512 mlx5_link_update_unlocked_gset(struct rte_eth_dev *dev,
 513                                struct rte_eth_link *link)
 514 {
 515         struct priv *priv = dev->data->dev_private;
 516         struct ethtool_cmd edata = {
 517                 .cmd = ETHTOOL_GSET /* Deprecated since Linux v4.5. */
 518         };
 519         struct ifreq ifr;
 520         struct rte_eth_link dev_link;
 521         int link_speed = 0;
 522         int ret;
 523
 524         ret = mlx5_ifreq(dev, SIOCGIFFLAGS, &ifr);
 525         if (ret) {
 526                 DRV_LOG(WARNING, "port %u ioctl(SIOCGIFFLAGS) failed: %s",
 527                         dev->data->port_id, strerror(rte_errno));
 528                 return ret;
 529         }
 530         memset(&dev_link, 0, sizeof(dev_link));
 531         dev_link.link_status = ((ifr.ifr_flags & IFF_UP) &&
 532                                 (ifr.ifr_flags & IFF_RUNNING));
 533         ifr.ifr_data = (void *)&edata;
 534         ret = mlx5_ifreq(dev, SIOCETHTOOL, &ifr);
 535         if (ret) {
 536                 DRV_LOG(WARNING,
 537                         "port %u ioctl(SIOCETHTOOL, ETHTOOL_GSET) failed: %s",
 538                         dev->data->port_id, strerror(rte_errno));
 539                 return ret;
 540         }
 541         link_speed = ethtool_cmd_speed(&edata);
 542         if (link_speed == -1)
 543                 dev_link.link_speed = 0;
 544         else
 545                 dev_link.link_speed = link_speed;
 546         priv->link_speed_capa = 0;
 547         if (edata.supported & SUPPORTED_Autoneg)
 548                 priv->link_speed_capa |= ETH_LINK_SPEED_AUTONEG;
 549         if (edata.supported & (SUPPORTED_1000baseT_Full |
 550                                SUPPORTED_1000baseKX_Full))
 551                 priv->link_speed_capa |= ETH_LINK_SPEED_1G;
 552         if (edata.supported & SUPPORTED_10000baseKR_Full)
 553                 priv->link_speed_capa |= ETH_LINK_SPEED_10G;
 554         if (edata.supported & (SUPPORTED_40000baseKR4_Full |
 555                                SUPPORTED_40000baseCR4_Full |
 556                                SUPPORTED_40000baseSR4_Full |
 557                                SUPPORTED_40000baseLR4_Full))
 558                 priv->link_speed_capa |= ETH_LINK_SPEED_40G;
 559         dev_link.link_duplex = ((edata.duplex == DUPLEX_HALF) ?
 560                                 ETH_LINK_HALF_DUPLEX : ETH_LINK_FULL_DUPLEX);
 561         dev_link.link_autoneg = !(dev->data->dev_conf.link_speeds &
 562                         ETH_LINK_SPEED_FIXED);
 563         if ((dev_link.link_speed && !dev_link.link_status) ||
 564             (!dev_link.link_speed && dev_link.link_status)) {
 565                 rte_errno = EAGAIN;
 566                 return -rte_errno;
 567         }
 568         *link = dev_link;
 569         return 0;
 570 }
 571
 572 /**
 573  * Retrieve physical link information (unlocked version using new ioctl).
 574  *
 575  * @param dev
 576  *   Pointer to Ethernet device structure.
 577  * @param[out] link
 578  *   Storage for current link status.
 579  *
 580  * @return
 581  *   0 on success, a negative errno value otherwise and rte_errno is set.
 582  */
 583 static int
 584 mlx5_link_update_unlocked_gs(struct rte_eth_dev *dev,
 585                              struct rte_eth_link *link)
 586
 587 {
 588         struct priv *priv = dev->data->dev_private;
 589         struct ethtool_link_settings gcmd = { .cmd = ETHTOOL_GLINKSETTINGS };
 590         struct ifreq ifr;
 591         struct rte_eth_link dev_link;
 592         uint64_t sc;
 593         int ret;
 594
 595         ret = mlx5_ifreq(dev, SIOCGIFFLAGS, &ifr);
 596         if (ret) {
 597                 DRV_LOG(WARNING, "port %u ioctl(SIOCGIFFLAGS) failed: %s",
 598                         dev->data->port_id, strerror(rte_errno));
 599                 return ret;
 600         }
 601         memset(&dev_link, 0, sizeof(dev_link));
 602         dev_link.link_status = ((ifr.ifr_flags & IFF_UP) &&
 603                                 (ifr.ifr_flags & IFF_RUNNING));
 604         ifr.ifr_data = (void *)&gcmd;
 605         ret = mlx5_ifreq(dev, SIOCETHTOOL, &ifr);
 606         if (ret) {
 607                 DRV_LOG(DEBUG,
 608                         "port %u ioctl(SIOCETHTOOL, ETHTOOL_GLINKSETTINGS)"
 609                         " failed: %s",
 610                         dev->data->port_id, strerror(rte_errno));
 611                 return ret;
 612         }
 613         gcmd.link_mode_masks_nwords = -gcmd.link_mode_masks_nwords;
 614
 615         alignas(struct ethtool_link_settings)
 616         uint8_t data[offsetof(struct ethtool_link_settings, link_mode_masks) +
 617                      sizeof(uint32_t) * gcmd.link_mode_masks_nwords * 3];
 618         struct ethtool_link_settings *ecmd = (void *)data;
 619
 620         *ecmd = gcmd;
 621         ifr.ifr_data = (void *)ecmd;
 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         dev_link.link_speed = ecmd->speed;
 631         sc = ecmd->link_mode_masks[0] |
 632                 ((uint64_t)ecmd->link_mode_masks[1] << 32);
 633         priv->link_speed_capa = 0;
 634         if (sc & MLX5_BITSHIFT(ETHTOOL_LINK_MODE_Autoneg_BIT))
 635                 priv->link_speed_capa |= ETH_LINK_SPEED_AUTONEG;
 636         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_1000baseT_Full_BIT) |
 637                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_1000baseKX_Full_BIT)))
 638                 priv->link_speed_capa |= ETH_LINK_SPEED_1G;
 639         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT) |
 640                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT) |
 641                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_10000baseR_FEC_BIT)))
 642                 priv->link_speed_capa |= ETH_LINK_SPEED_10G;
 643         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_20000baseMLD2_Full_BIT) |
 644                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_20000baseKR2_Full_BIT)))
 645                 priv->link_speed_capa |= ETH_LINK_SPEED_20G;
 646         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT) |
 647                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT) |
 648                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT) |
 649                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT)))
 650                 priv->link_speed_capa |= ETH_LINK_SPEED_40G;
 651         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_56000baseKR4_Full_BIT) |
 652                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_56000baseCR4_Full_BIT) |
 653                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_56000baseSR4_Full_BIT) |
 654                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_56000baseLR4_Full_BIT)))
 655                 priv->link_speed_capa |= ETH_LINK_SPEED_56G;
 656         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_25000baseCR_Full_BIT) |
 657                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_25000baseKR_Full_BIT) |
 658                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_25000baseSR_Full_BIT)))
 659                 priv->link_speed_capa |= ETH_LINK_SPEED_25G;
 660         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT) |
 661                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT)))
 662                 priv->link_speed_capa |= ETH_LINK_SPEED_50G;
 663         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT) |
 664                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT) |
 665                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT) |
 666                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT)))
 667                 priv->link_speed_capa |= ETH_LINK_SPEED_100G;
 668         dev_link.link_duplex = ((ecmd->duplex == DUPLEX_HALF) ?
 669                                 ETH_LINK_HALF_DUPLEX : ETH_LINK_FULL_DUPLEX);
 670         dev_link.link_autoneg = !(dev->data->dev_conf.link_speeds &
 671                                   ETH_LINK_SPEED_FIXED);
 672         if ((dev_link.link_speed && !dev_link.link_status) ||
 673             (!dev_link.link_speed && dev_link.link_status)) {
 674                 rte_errno = EAGAIN;
 675                 return -rte_errno;
 676         }
 677         *link = dev_link;
 678         return 0;
 679 }
 680
 681 /**
 682  * DPDK callback to retrieve physical link information.
 683  *
 684  * @param dev
 685  *   Pointer to Ethernet device structure.
 686  * @param wait_to_complete
 687  *   Wait for request completion.
 688  *
 689  * @return
 690  *   0 if link status was not updated, positive if it was, a negative errno
 691  *   value otherwise and rte_errno is set.
 692  */
 693 int
 694 mlx5_link_update(struct rte_eth_dev *dev, int wait_to_complete)
 695 {
 696         int ret;
 697         struct rte_eth_link dev_link;
 698         time_t start_time = time(NULL);
 699
 700         do {
 701                 ret = mlx5_link_update_unlocked_gset(dev, &dev_link);
 702                 if (ret)
 703                         ret = mlx5_link_update_unlocked_gs(dev, &dev_link);
 704                 if (ret == 0)
 705                         break;
 706                 /* Handle wait to complete situation. */
 707                 if (wait_to_complete && ret == -EAGAIN) {
 708                         if (abs((int)difftime(time(NULL), start_time)) <
 709                             MLX5_LINK_STATUS_TIMEOUT) {
 710                                 usleep(0);
 711                                 continue;
 712                         } else {
 713                                 rte_errno = EBUSY;
 714                                 return -rte_errno;
 715                         }
 716                 } else if (ret < 0) {
 717                         return ret;
 718                 }
 719         } while (wait_to_complete);
 720         ret = !!memcmp(&dev->data->dev_link, &dev_link,
 721                        sizeof(struct rte_eth_link));
 722         dev->data->dev_link = dev_link;
 723         return ret;
 724 }
 725
 726 /**
 727  * DPDK callback to change the MTU.
 728  *
 729  * @param dev
 730  *   Pointer to Ethernet device structure.
 731  * @param in_mtu
 732  *   New MTU.
 733  *
 734  * @return
 735  *   0 on success, a negative errno value otherwise and rte_errno is set.
 736  */
 737 int
 738 mlx5_dev_set_mtu(struct rte_eth_dev *dev, uint16_t mtu)
 739 {
 740         struct priv *priv = dev->data->dev_private;
 741         uint16_t kern_mtu = 0;
 742         int ret;
 743
 744         ret = mlx5_get_mtu(dev, &kern_mtu);
 745         if (ret)
 746                 return ret;
 747         /* Set kernel interface MTU first. */
 748         ret = mlx5_set_mtu(dev, mtu);
 749         if (ret)
 750                 return ret;
 751         ret = mlx5_get_mtu(dev, &kern_mtu);
 752         if (ret)
 753                 return ret;
 754         if (kern_mtu == mtu) {
 755                 priv->mtu = mtu;
 756                 DRV_LOG(DEBUG, "port %u adapter MTU set to %u",
 757                         dev->data->port_id, mtu);
 758                 return 0;
 759         }
 760         rte_errno = EAGAIN;
 761         return -rte_errno;
 762 }
 763
 764 /**
 765  * DPDK callback to get flow control status.
 766  *
 767  * @param dev
 768  *   Pointer to Ethernet device structure.
 769  * @param[out] fc_conf
 770  *   Flow control output buffer.
 771  *
 772  * @return
 773  *   0 on success, a negative errno value otherwise and rte_errno is set.
 774  */
 775 int
 776 mlx5_dev_get_flow_ctrl(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
 777 {
 778         struct ifreq ifr;
 779         struct ethtool_pauseparam ethpause = {
 780                 .cmd = ETHTOOL_GPAUSEPARAM
 781         };
 782         int ret;
 783
 784         ifr.ifr_data = (void *)&ethpause;
 785         ret = mlx5_ifreq(dev, SIOCETHTOOL, &ifr);
 786         if (ret) {
 787                 DRV_LOG(WARNING,
 788                         "port %u ioctl(SIOCETHTOOL, ETHTOOL_GPAUSEPARAM) failed:"
 789                         " %s",
 790                         dev->data->port_id, strerror(rte_errno));
 791                 return ret;
 792         }
 793         fc_conf->autoneg = ethpause.autoneg;
 794         if (ethpause.rx_pause && ethpause.tx_pause)
 795                 fc_conf->mode = RTE_FC_FULL;
 796         else if (ethpause.rx_pause)
 797                 fc_conf->mode = RTE_FC_RX_PAUSE;
 798         else if (ethpause.tx_pause)
 799                 fc_conf->mode = RTE_FC_TX_PAUSE;
 800         else
 801                 fc_conf->mode = RTE_FC_NONE;
 802         return 0;
 803 }
 804
 805 /**
 806  * DPDK callback to modify flow control parameters.
 807  *
 808  * @param dev
 809  *   Pointer to Ethernet device structure.
 810  * @param[in] fc_conf
 811  *   Flow control parameters.
 812  *
 813  * @return
 814  *   0 on success, a negative errno value otherwise and rte_errno is set.
 815  */
 816 int
 817 mlx5_dev_set_flow_ctrl(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
 818 {
 819         struct ifreq ifr;
 820         struct ethtool_pauseparam ethpause = {
 821                 .cmd = ETHTOOL_SPAUSEPARAM
 822         };
 823         int ret;
 824
 825         ifr.ifr_data = (void *)&ethpause;
 826         ethpause.autoneg = fc_conf->autoneg;
 827         if (((fc_conf->mode & RTE_FC_FULL) == RTE_FC_FULL) ||
 828             (fc_conf->mode & RTE_FC_RX_PAUSE))
 829                 ethpause.rx_pause = 1;
 830         else
 831                 ethpause.rx_pause = 0;
 832
 833         if (((fc_conf->mode & RTE_FC_FULL) == RTE_FC_FULL) ||
 834             (fc_conf->mode & RTE_FC_TX_PAUSE))
 835                 ethpause.tx_pause = 1;
 836         else
 837                 ethpause.tx_pause = 0;
 838         ret = mlx5_ifreq(dev, SIOCETHTOOL, &ifr);
 839         if (ret) {
 840                 DRV_LOG(WARNING,
 841                         "port %u ioctl(SIOCETHTOOL, ETHTOOL_SPAUSEPARAM)"
 842                         " failed: %s",
 843                         dev->data->port_id, strerror(rte_errno));
 844                 return ret;
 845         }
 846         return 0;
 847 }
 848
 849 /**
 850  * Get PCI information from struct ibv_device.
 851  *
 852  * @param device
 853  *   Pointer to Ethernet device structure.
 854  * @param[out] pci_addr
 855  *   PCI bus address output buffer.
 856  *
 857  * @return
 858  *   0 on success, a negative errno value otherwise and rte_errno is set.
 859  */
 860 int
 861 mlx5_ibv_device_to_pci_addr(const struct ibv_device *device,
 862                             struct rte_pci_addr *pci_addr)
 863 {
 864         FILE *file;
 865         char line[32];
 866         MKSTR(path, "%s/device/uevent", device->ibdev_path);
 867
 868         file = fopen(path, "rb");
 869         if (file == NULL) {
 870                 rte_errno = errno;
 871                 return -rte_errno;
 872         }
 873         while (fgets(line, sizeof(line), file) == line) {
 874                 size_t len = strlen(line);
 875                 int ret;
 876
 877                 /* Truncate long lines. */
 878                 if (len == (sizeof(line) - 1))
 879                         while (line[(len - 1)] != '\n') {
 880                                 ret = fgetc(file);
 881                                 if (ret == EOF)
 882                                         break;
 883                                 line[(len - 1)] = ret;
 884                         }
 885                 /* Extract information. */
 886                 if (sscanf(line,
 887                            "PCI_SLOT_NAME="
 888                            "%" SCNx32 ":%" SCNx8 ":%" SCNx8 ".%" SCNx8 "\n",
 889                            &pci_addr->domain,
 890                            &pci_addr->bus,
 891                            &pci_addr->devid,
 892                            &pci_addr->function) == 4) {
 893                         ret = 0;
 894                         break;
 895                 }
 896         }
 897         fclose(file);
 898         return 0;
 899 }
 900
 901 /**
 902  * Device status handler.
 903  *
 904  * @param dev
 905  *   Pointer to Ethernet device.
 906  * @param events
 907  *   Pointer to event flags holder.
 908  *
 909  * @return
 910  *   Events bitmap of callback process which can be called immediately.
 911  */
 912 static uint32_t
 913 mlx5_dev_status_handler(struct rte_eth_dev *dev)
 914 {
 915         struct priv *priv = dev->data->dev_private;
 916         struct ibv_async_event event;
 917         uint32_t ret = 0;
 918
 919         if (mlx5_link_update(dev, 0) == -EAGAIN) {
 920                 usleep(0);
 921                 return 0;
 922         }
 923         /* Read all message and acknowledge them. */
 924         for (;;) {
 925                 if (mlx5_glue->get_async_event(priv->ctx, &event))
 926                         break;
 927                 if ((event.event_type == IBV_EVENT_PORT_ACTIVE ||
 928                         event.event_type == IBV_EVENT_PORT_ERR) &&
 929                         (dev->data->dev_conf.intr_conf.lsc == 1))
 930                         ret |= (1 << RTE_ETH_EVENT_INTR_LSC);
 931                 else if (event.event_type == IBV_EVENT_DEVICE_FATAL &&
 932                         dev->data->dev_conf.intr_conf.rmv == 1)
 933                         ret |= (1 << RTE_ETH_EVENT_INTR_RMV);
 934                 else
 935                         DRV_LOG(DEBUG,
 936                                 "port %u event type %d on not handled",
 937                                 dev->data->port_id, event.event_type);
 938                 mlx5_glue->ack_async_event(&event);
 939         }
 940         return ret;
 941 }
 942
 943 /**
 944  * Handle interrupts from the NIC.
 945  *
 946  * @param[in] intr_handle
 947  *   Interrupt handler.
 948  * @param cb_arg
 949  *   Callback argument.
 950  */
 951 void
 952 mlx5_dev_interrupt_handler(void *cb_arg)
 953 {
 954         struct rte_eth_dev *dev = cb_arg;
 955         uint32_t events;
 956
 957         events = mlx5_dev_status_handler(dev);
 958         if (events & (1 << RTE_ETH_EVENT_INTR_LSC))
 959                 _rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL);
 960         if (events & (1 << RTE_ETH_EVENT_INTR_RMV))
 961                 _rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_RMV, NULL);
 962 }
 963
 964 /**
 965  * Handle interrupts from the socket.
 966  *
 967  * @param cb_arg
 968  *   Callback argument.
 969  */
 970 static void
 971 mlx5_dev_handler_socket(void *cb_arg)
 972 {
 973         struct rte_eth_dev *dev = cb_arg;
 974
 975         mlx5_socket_handle(dev);
 976 }
 977
 978 /**
 979  * Uninstall interrupt handler.
 980  *
 981  * @param dev
 982  *   Pointer to Ethernet device.
 983  */
 984 void
 985 mlx5_dev_interrupt_handler_uninstall(struct rte_eth_dev *dev)
 986 {
 987         struct priv *priv = dev->data->dev_private;
 988
 989         if (dev->data->dev_conf.intr_conf.lsc ||
 990             dev->data->dev_conf.intr_conf.rmv)
 991                 rte_intr_callback_unregister(&priv->intr_handle,
 992                                              mlx5_dev_interrupt_handler, dev);
 993         if (priv->primary_socket)
 994                 rte_intr_callback_unregister(&priv->intr_handle_socket,
 995                                              mlx5_dev_handler_socket, dev);
 996         priv->intr_handle.fd = 0;
 997         priv->intr_handle.type = RTE_INTR_HANDLE_UNKNOWN;
 998         priv->intr_handle_socket.fd = 0;
 999         priv->intr_handle_socket.type = RTE_INTR_HANDLE_UNKNOWN;
1000 }
1001
1002 /**
1003  * Install interrupt handler.
1004  *
1005  * @param dev
1006  *   Pointer to Ethernet device.
1007  */
1008 void
1009 mlx5_dev_interrupt_handler_install(struct rte_eth_dev *dev)
1010 {
1011         struct priv *priv = dev->data->dev_private;
1012         int ret;
1013         int flags;
1014
1015         assert(priv->ctx->async_fd > 0);
1016         flags = fcntl(priv->ctx->async_fd, F_GETFL);
1017         ret = fcntl(priv->ctx->async_fd, F_SETFL, flags | O_NONBLOCK);
1018         if (ret) {
1019                 DRV_LOG(INFO,
1020                         "port %u failed to change file descriptor async event"
1021                         " queue",
1022                         dev->data->port_id);
1023                 dev->data->dev_conf.intr_conf.lsc = 0;
1024                 dev->data->dev_conf.intr_conf.rmv = 0;
1025         }
1026         if (dev->data->dev_conf.intr_conf.lsc ||
1027             dev->data->dev_conf.intr_conf.rmv) {
1028                 priv->intr_handle.fd = priv->ctx->async_fd;
1029                 priv->intr_handle.type = RTE_INTR_HANDLE_EXT;
1030                 rte_intr_callback_register(&priv->intr_handle,
1031                                            mlx5_dev_interrupt_handler, dev);
1032         }
1033         ret = mlx5_socket_init(dev);
1034         if (ret)
1035                 DRV_LOG(ERR, "port %u cannot initialise socket: %s",
1036                         dev->data->port_id, strerror(rte_errno));
1037         else if (priv->primary_socket) {
1038                 priv->intr_handle_socket.fd = priv->primary_socket;
1039                 priv->intr_handle_socket.type = RTE_INTR_HANDLE_EXT;
1040                 rte_intr_callback_register(&priv->intr_handle_socket,
1041                                            mlx5_dev_handler_socket, dev);
1042         }
1043 }
1044
1045 /**
1046  * DPDK callback to bring the link DOWN.
1047  *
1048  * @param dev
1049  *   Pointer to Ethernet device structure.
1050  *
1051  * @return
1052  *   0 on success, a negative errno value otherwise and rte_errno is set.
1053  */
1054 int
1055 mlx5_set_link_down(struct rte_eth_dev *dev)
1056 {
1057         return mlx5_set_flags(dev, ~IFF_UP, ~IFF_UP);
1058 }
1059
1060 /**
1061  * DPDK callback to bring the link UP.
1062  *
1063  * @param dev
1064  *   Pointer to Ethernet device structure.
1065  *
1066  * @return
1067  *   0 on success, a negative errno value otherwise and rte_errno is set.
1068  */
1069 int
1070 mlx5_set_link_up(struct rte_eth_dev *dev)
1071 {
1072         return mlx5_set_flags(dev, ~IFF_UP, IFF_UP);
1073 }
1074
1075 /**
1076  * Configure the TX function to use.
1077  *
1078  * @param dev
1079  *   Pointer to private data structure.
1080  *
1081  * @return
1082  *   Pointer to selected Tx burst function.
1083  */
1084 eth_tx_burst_t
1085 mlx5_select_tx_function(struct rte_eth_dev *dev)
1086 {
1087         struct priv *priv = dev->data->dev_private;
1088         eth_tx_burst_t tx_pkt_burst = mlx5_tx_burst;
1089         struct mlx5_dev_config *config = &priv->config;
1090         uint64_t tx_offloads = dev->data->dev_conf.txmode.offloads;
1091         int tso = !!(tx_offloads & (DEV_TX_OFFLOAD_TCP_TSO |
1092                                     DEV_TX_OFFLOAD_VXLAN_TNL_TSO |
1093                                     DEV_TX_OFFLOAD_GRE_TNL_TSO));
1094         int vlan_insert = !!(tx_offloads & DEV_TX_OFFLOAD_VLAN_INSERT);
1095
1096         assert(priv != NULL);
1097         /* Select appropriate TX function. */
1098         if (vlan_insert || tso)
1099                 return tx_pkt_burst;
1100         if (config->mps == MLX5_MPW_ENHANCED) {
1101                 if (mlx5_check_vec_tx_support(dev) > 0) {
1102                         if (mlx5_check_raw_vec_tx_support(dev) > 0)
1103                                 tx_pkt_burst = mlx5_tx_burst_raw_vec;
1104                         else
1105                                 tx_pkt_burst = mlx5_tx_burst_vec;
1106                         DRV_LOG(DEBUG,
1107                                 "port %u selected enhanced MPW Tx vectorized"
1108                                 " function",
1109                                 dev->data->port_id);
1110                 } else {
1111                         tx_pkt_burst = mlx5_tx_burst_empw;
1112                         DRV_LOG(DEBUG,
1113                                 "port %u selected enhanced MPW Tx function",
1114                                 dev->data->port_id);
1115                 }
1116         } else if (config->mps && (config->txq_inline > 0)) {
1117                 tx_pkt_burst = mlx5_tx_burst_mpw_inline;
1118                 DRV_LOG(DEBUG, "port %u selected MPW inline Tx function",
1119                         dev->data->port_id);
1120         } else if (config->mps) {
1121                 tx_pkt_burst = mlx5_tx_burst_mpw;
1122                 DRV_LOG(DEBUG, "port %u selected MPW Tx function",
1123                         dev->data->port_id);
1124         }
1125         return tx_pkt_burst;
1126 }
1127
1128 /**
1129  * Configure the RX function to use.
1130  *
1131  * @param dev
1132  *   Pointer to private data structure.
1133  *
1134  * @return
1135  *   Pointer to selected Rx burst function.
1136  */
1137 eth_rx_burst_t
1138 mlx5_select_rx_function(struct rte_eth_dev *dev)
1139 {
1140         eth_rx_burst_t rx_pkt_burst = mlx5_rx_burst;
1141
1142         assert(dev != NULL);
1143         if (mlx5_check_vec_rx_support(dev) > 0) {
1144                 rx_pkt_burst = mlx5_rx_burst_vec;
1145                 DRV_LOG(DEBUG, "port %u selected Rx vectorized function",
1146                         dev->data->port_id);
1147         }
1148         return rx_pkt_burst;
1149 }
1150
1151 /**
1152  * Check if mlx5 device was removed.
1153  *
1154  * @param dev
1155  *   Pointer to Ethernet device structure.
1156  *
1157  * @return
1158  *   1 when device is removed, otherwise 0.
1159  */
1160 int
1161 mlx5_is_removed(struct rte_eth_dev *dev)
1162 {
1163         struct ibv_device_attr device_attr;
1164         struct priv *priv = dev->data->dev_private;
1165
1166         if (mlx5_glue->query_device(priv->ctx, &device_attr) == EIO)
1167                 return 1;
1168         return 0;
1169 }