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 #include <stddef.h>
   7 #include <assert.h>
   8 #include <inttypes.h>
   9 #include <unistd.h>
  10 #include <stdbool.h>
  11 #include <stdint.h>
  12 #include <stdio.h>
  13 #include <string.h>
  14 #include <stdlib.h>
  15 #include <errno.h>
  16 #include <dirent.h>
  17 #include <net/if.h>
  18 #include <sys/ioctl.h>
  19 #include <sys/socket.h>
  20 #include <netinet/in.h>
  21 #include <linux/ethtool.h>
  22 #include <linux/sockios.h>
  23 #include <fcntl.h>
  24 #include <stdalign.h>
  25 #include <sys/un.h>
  26 #include <time.h>
  27
  28 #include <rte_atomic.h>
  29 #include <rte_ethdev_driver.h>
  30 #include <rte_bus_pci.h>
  31 #include <rte_mbuf.h>
  32 #include <rte_common.h>
  33 #include <rte_interrupts.h>
  34 #include <rte_malloc.h>
  35 #include <rte_string_fns.h>
  36 #include <rte_rwlock.h>
  37 #include <rte_cycles.h>
  38
  39 #include "mlx5.h"
  40 #include "mlx5_glue.h"
  41 #include "mlx5_rxtx.h"
  42 #include "mlx5_utils.h"
  43
  44 /* Supported speed values found in /usr/include/linux/ethtool.h */
  45 #ifndef HAVE_SUPPORTED_40000baseKR4_Full
  46 #define SUPPORTED_40000baseKR4_Full (1 << 23)
  47 #endif
  48 #ifndef HAVE_SUPPORTED_40000baseCR4_Full
  49 #define SUPPORTED_40000baseCR4_Full (1 << 24)
  50 #endif
  51 #ifndef HAVE_SUPPORTED_40000baseSR4_Full
  52 #define SUPPORTED_40000baseSR4_Full (1 << 25)
  53 #endif
  54 #ifndef HAVE_SUPPORTED_40000baseLR4_Full
  55 #define SUPPORTED_40000baseLR4_Full (1 << 26)
  56 #endif
  57 #ifndef HAVE_SUPPORTED_56000baseKR4_Full
  58 #define SUPPORTED_56000baseKR4_Full (1 << 27)
  59 #endif
  60 #ifndef HAVE_SUPPORTED_56000baseCR4_Full
  61 #define SUPPORTED_56000baseCR4_Full (1 << 28)
  62 #endif
  63 #ifndef HAVE_SUPPORTED_56000baseSR4_Full
  64 #define SUPPORTED_56000baseSR4_Full (1 << 29)
  65 #endif
  66 #ifndef HAVE_SUPPORTED_56000baseLR4_Full
  67 #define SUPPORTED_56000baseLR4_Full (1 << 30)
  68 #endif
  69
  70 /* Add defines in case the running kernel is not the same as user headers. */
  71 #ifndef ETHTOOL_GLINKSETTINGS
  72 struct ethtool_link_settings {
  73         uint32_t cmd;
  74         uint32_t speed;
  75         uint8_t duplex;
  76         uint8_t port;
  77         uint8_t phy_address;
  78         uint8_t autoneg;
  79         uint8_t mdio_support;
  80         uint8_t eth_to_mdix;
  81         uint8_t eth_tp_mdix_ctrl;
  82         int8_t link_mode_masks_nwords;
  83         uint32_t reserved[8];
  84         uint32_t link_mode_masks[];
  85 };
  86
  87 #define ETHTOOL_GLINKSETTINGS 0x0000004c
  88 #define ETHTOOL_LINK_MODE_1000baseT_Full_BIT 5
  89 #define ETHTOOL_LINK_MODE_Autoneg_BIT 6
  90 #define ETHTOOL_LINK_MODE_1000baseKX_Full_BIT 17
  91 #define ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT 18
  92 #define ETHTOOL_LINK_MODE_10000baseKR_Full_BIT 19
  93 #define ETHTOOL_LINK_MODE_10000baseR_FEC_BIT 20
  94 #define ETHTOOL_LINK_MODE_20000baseMLD2_Full_BIT 21
  95 #define ETHTOOL_LINK_MODE_20000baseKR2_Full_BIT 22
  96 #define ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT 23
  97 #define ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT 24
  98 #define ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT 25
  99 #define ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT 26
 100 #define ETHTOOL_LINK_MODE_56000baseKR4_Full_BIT 27
 101 #define ETHTOOL_LINK_MODE_56000baseCR4_Full_BIT 28
 102 #define ETHTOOL_LINK_MODE_56000baseSR4_Full_BIT 29
 103 #define ETHTOOL_LINK_MODE_56000baseLR4_Full_BIT 30
 104 #endif
 105 #ifndef HAVE_ETHTOOL_LINK_MODE_25G
 106 #define ETHTOOL_LINK_MODE_25000baseCR_Full_BIT 31
 107 #define ETHTOOL_LINK_MODE_25000baseKR_Full_BIT 32
 108 #define ETHTOOL_LINK_MODE_25000baseSR_Full_BIT 33
 109 #endif
 110 #ifndef HAVE_ETHTOOL_LINK_MODE_50G
 111 #define ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT 34
 112 #define ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT 35
 113 #endif
 114 #ifndef HAVE_ETHTOOL_LINK_MODE_100G
 115 #define ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT 36
 116 #define ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT 37
 117 #define ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT 38
 118 #define ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT 39
 119 #endif
 120
 121 /**
 122  * Get master interface name from private structure.
 123  *
 124  * @param[in] dev
 125  *   Pointer to Ethernet device.
 126  * @param[out] ifname
 127  *   Interface name output buffer.
 128  *
 129  * @return
 130  *   0 on success, a negative errno value otherwise and rte_errno is set.
 131  */
 132 int
 133 mlx5_get_master_ifname(const char *ibdev_path, char (*ifname)[IF_NAMESIZE])
 134 {
 135         DIR *dir;
 136         struct dirent *dent;
 137         unsigned int dev_type = 0;
 138         unsigned int dev_port_prev = ~0u;
 139         char match[IF_NAMESIZE] = "";
 140
 141         assert(ibdev_path);
 142         {
 143                 MKSTR(path, "%s/device/net", ibdev_path);
 144
 145                 dir = opendir(path);
 146                 if (dir == NULL) {
 147                         rte_errno = errno;
 148                         return -rte_errno;
 149                 }
 150         }
 151         while ((dent = readdir(dir)) != NULL) {
 152                 char *name = dent->d_name;
 153                 FILE *file;
 154                 unsigned int dev_port;
 155                 int r;
 156
 157                 if ((name[0] == '.') &&
 158                     ((name[1] == '\0') ||
 159                      ((name[1] == '.') && (name[2] == '\0'))))
 160                         continue;
 161
 162                 MKSTR(path, "%s/device/net/%s/%s",
 163                       ibdev_path, name,
 164                       (dev_type ? "dev_id" : "dev_port"));
 165
 166                 file = fopen(path, "rb");
 167                 if (file == NULL) {
 168                         if (errno != ENOENT)
 169                                 continue;
 170                         /*
 171                          * Switch to dev_id when dev_port does not exist as
 172                          * is the case with Linux kernel versions < 3.15.
 173                          */
 174 try_dev_id:
 175                         match[0] = '\0';
 176                         if (dev_type)
 177                                 break;
 178                         dev_type = 1;
 179                         dev_port_prev = ~0u;
 180                         rewinddir(dir);
 181                         continue;
 182                 }
 183                 r = fscanf(file, (dev_type ? "%x" : "%u"), &dev_port);
 184                 fclose(file);
 185                 if (r != 1)
 186                         continue;
 187                 /*
 188                  * Switch to dev_id when dev_port returns the same value for
 189                  * all ports. May happen when using a MOFED release older than
 190                  * 3.0 with a Linux kernel >= 3.15.
 191                  */
 192                 if (dev_port == dev_port_prev)
 193                         goto try_dev_id;
 194                 dev_port_prev = dev_port;
 195                 if (dev_port == 0)
 196                         strlcpy(match, name, sizeof(match));
 197         }
 198         closedir(dir);
 199         if (match[0] == '\0') {
 200                 rte_errno = ENOENT;
 201                 return -rte_errno;
 202         }
 203         strncpy(*ifname, match, sizeof(*ifname));
 204         return 0;
 205 }
 206
 207 /**
 208  * Get interface name from private structure.
 209  *
 210  * This is a port representor-aware version of mlx5_get_master_ifname().
 211  *
 212  * @param[in] dev
 213  *   Pointer to Ethernet device.
 214  * @param[out] ifname
 215  *   Interface name output buffer.
 216  *
 217  * @return
 218  *   0 on success, a negative errno value otherwise and rte_errno is set.
 219  */
 220 int
 221 mlx5_get_ifname(const struct rte_eth_dev *dev, char (*ifname)[IF_NAMESIZE])
 222 {
 223         struct mlx5_priv *priv = dev->data->dev_private;
 224         unsigned int ifindex;
 225
 226         assert(priv);
 227         assert(priv->sh);
 228         ifindex = mlx5_ifindex(dev);
 229         if (!ifindex) {
 230                 if (!priv->representor)
 231                         return mlx5_get_master_ifname(priv->sh->ibdev_path,
 232                                                       ifname);
 233                 rte_errno = ENXIO;
 234                 return -rte_errno;
 235         }
 236         if (if_indextoname(ifindex, &(*ifname)[0]))
 237                 return 0;
 238         rte_errno = errno;
 239         return -rte_errno;
 240 }
 241
 242 /**
 243  * Get the interface index from device name.
 244  *
 245  * @param[in] dev
 246  *   Pointer to Ethernet device.
 247  *
 248  * @return
 249  *   Nonzero interface index on success, zero otherwise and rte_errno is set.
 250  */
 251 unsigned int
 252 mlx5_ifindex(const struct rte_eth_dev *dev)
 253 {
 254         struct mlx5_priv *priv = dev->data->dev_private;
 255         unsigned int ifindex;
 256
 257         assert(priv);
 258         assert(priv->if_index);
 259         ifindex = priv->if_index;
 260         if (!ifindex)
 261                 rte_errno = ENXIO;
 262         return ifindex;
 263 }
 264
 265 /**
 266  * Perform ifreq ioctl() on associated Ethernet device.
 267  *
 268  * @param[in] dev
 269  *   Pointer to Ethernet device.
 270  * @param req
 271  *   Request number to pass to ioctl().
 272  * @param[out] ifr
 273  *   Interface request structure output buffer.
 274  *
 275  * @return
 276  *   0 on success, a negative errno value otherwise and rte_errno is set.
 277  */
 278 int
 279 mlx5_ifreq(const struct rte_eth_dev *dev, int req, struct ifreq *ifr)
 280 {
 281         int sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP);
 282         int ret = 0;
 283
 284         if (sock == -1) {
 285                 rte_errno = errno;
 286                 return -rte_errno;
 287         }
 288         ret = mlx5_get_ifname(dev, &ifr->ifr_name);
 289         if (ret)
 290                 goto error;
 291         ret = ioctl(sock, req, ifr);
 292         if (ret == -1) {
 293                 rte_errno = errno;
 294                 goto error;
 295         }
 296         close(sock);
 297         return 0;
 298 error:
 299         close(sock);
 300         return -rte_errno;
 301 }
 302
 303 /**
 304  * Get device MTU.
 305  *
 306  * @param dev
 307  *   Pointer to Ethernet device.
 308  * @param[out] mtu
 309  *   MTU value output buffer.
 310  *
 311  * @return
 312  *   0 on success, a negative errno value otherwise and rte_errno is set.
 313  */
 314 int
 315 mlx5_get_mtu(struct rte_eth_dev *dev, uint16_t *mtu)
 316 {
 317         struct ifreq request;
 318         int ret = mlx5_ifreq(dev, SIOCGIFMTU, &request);
 319
 320         if (ret)
 321                 return ret;
 322         *mtu = request.ifr_mtu;
 323         return 0;
 324 }
 325
 326 /**
 327  * Set device MTU.
 328  *
 329  * @param dev
 330  *   Pointer to Ethernet device.
 331  * @param mtu
 332  *   MTU value to set.
 333  *
 334  * @return
 335  *   0 on success, a negative errno value otherwise and rte_errno is set.
 336  */
 337 static int
 338 mlx5_set_mtu(struct rte_eth_dev *dev, uint16_t mtu)
 339 {
 340         struct ifreq request = { .ifr_mtu = mtu, };
 341
 342         return mlx5_ifreq(dev, SIOCSIFMTU, &request);
 343 }
 344
 345 /**
 346  * Set device flags.
 347  *
 348  * @param dev
 349  *   Pointer to Ethernet device.
 350  * @param keep
 351  *   Bitmask for flags that must remain untouched.
 352  * @param flags
 353  *   Bitmask for flags to modify.
 354  *
 355  * @return
 356  *   0 on success, a negative errno value otherwise and rte_errno is set.
 357  */
 358 int
 359 mlx5_set_flags(struct rte_eth_dev *dev, unsigned int keep, unsigned int flags)
 360 {
 361         struct ifreq request;
 362         int ret = mlx5_ifreq(dev, SIOCGIFFLAGS, &request);
 363
 364         if (ret)
 365                 return ret;
 366         request.ifr_flags &= keep;
 367         request.ifr_flags |= flags & ~keep;
 368         return mlx5_ifreq(dev, SIOCSIFFLAGS, &request);
 369 }
 370
 371 /**
 372  * DPDK callback for Ethernet device configuration.
 373  *
 374  * @param dev
 375  *   Pointer to Ethernet device structure.
 376  *
 377  * @return
 378  *   0 on success, a negative errno value otherwise and rte_errno is set.
 379  */
 380 int
 381 mlx5_dev_configure(struct rte_eth_dev *dev)
 382 {
 383         struct mlx5_priv *priv = dev->data->dev_private;
 384         unsigned int rxqs_n = dev->data->nb_rx_queues;
 385         unsigned int txqs_n = dev->data->nb_tx_queues;
 386         unsigned int i;
 387         unsigned int j;
 388         unsigned int reta_idx_n;
 389         const uint8_t use_app_rss_key =
 390                 !!dev->data->dev_conf.rx_adv_conf.rss_conf.rss_key;
 391         int ret = 0;
 392
 393         if (use_app_rss_key &&
 394             (dev->data->dev_conf.rx_adv_conf.rss_conf.rss_key_len !=
 395              MLX5_RSS_HASH_KEY_LEN)) {
 396                 DRV_LOG(ERR, "port %u RSS key len must be %s Bytes long",
 397                         dev->data->port_id, RTE_STR(MLX5_RSS_HASH_KEY_LEN));
 398                 rte_errno = EINVAL;
 399                 return -rte_errno;
 400         }
 401         priv->rss_conf.rss_key =
 402                 rte_realloc(priv->rss_conf.rss_key,
 403                             MLX5_RSS_HASH_KEY_LEN, 0);
 404         if (!priv->rss_conf.rss_key) {
 405                 DRV_LOG(ERR, "port %u cannot allocate RSS hash key memory (%u)",
 406                         dev->data->port_id, rxqs_n);
 407                 rte_errno = ENOMEM;
 408                 return -rte_errno;
 409         }
 410         memcpy(priv->rss_conf.rss_key,
 411                use_app_rss_key ?
 412                dev->data->dev_conf.rx_adv_conf.rss_conf.rss_key :
 413                rss_hash_default_key,
 414                MLX5_RSS_HASH_KEY_LEN);
 415         priv->rss_conf.rss_key_len = MLX5_RSS_HASH_KEY_LEN;
 416         priv->rss_conf.rss_hf = dev->data->dev_conf.rx_adv_conf.rss_conf.rss_hf;
 417         priv->rxqs = (void *)dev->data->rx_queues;
 418         priv->txqs = (void *)dev->data->tx_queues;
 419         if (txqs_n != priv->txqs_n) {
 420                 DRV_LOG(INFO, "port %u Tx queues number update: %u -> %u",
 421                         dev->data->port_id, priv->txqs_n, txqs_n);
 422                 priv->txqs_n = txqs_n;
 423         }
 424         if (rxqs_n > priv->config.ind_table_max_size) {
 425                 DRV_LOG(ERR, "port %u cannot handle this many Rx queues (%u)",
 426                         dev->data->port_id, rxqs_n);
 427                 rte_errno = EINVAL;
 428                 return -rte_errno;
 429         }
 430         if (rxqs_n != priv->rxqs_n) {
 431                 DRV_LOG(INFO, "port %u Rx queues number update: %u -> %u",
 432                         dev->data->port_id, priv->rxqs_n, rxqs_n);
 433                 priv->rxqs_n = rxqs_n;
 434                 /*
 435                  * If the requested number of RX queues is not a power of two,
 436                  * use the maximum indirection table size for better balancing.
 437                  * The result is always rounded to the next power of two.
 438                  */
 439                 reta_idx_n = (1 << log2above((rxqs_n & (rxqs_n - 1)) ?
 440                                              priv->config.ind_table_max_size :
 441                                              rxqs_n));
 442                 ret = mlx5_rss_reta_index_resize(dev, reta_idx_n);
 443                 if (ret)
 444                         return ret;
 445                 /*
 446                  * When the number of RX queues is not a power of two,
 447                  * the remaining table entries are padded with reused WQs
 448                  * and hashes are not spread uniformly.
 449                  */
 450                 for (i = 0, j = 0; (i != reta_idx_n); ++i) {
 451                         (*priv->reta_idx)[i] = j;
 452                         if (++j == rxqs_n)
 453                                 j = 0;
 454                 }
 455         }
 456         ret = mlx5_proc_priv_init(dev);
 457         if (ret)
 458                 return ret;
 459         return 0;
 460 }
 461
 462 /**
 463  * Sets default tuning parameters.
 464  *
 465  * @param dev
 466  *   Pointer to Ethernet device.
 467  * @param[out] info
 468  *   Info structure output buffer.
 469  */
 470 static void
 471 mlx5_set_default_params(struct rte_eth_dev *dev, struct rte_eth_dev_info *info)
 472 {
 473         struct mlx5_priv *priv = dev->data->dev_private;
 474
 475         /* Minimum CPU utilization. */
 476         info->default_rxportconf.ring_size = 256;
 477         info->default_txportconf.ring_size = 256;
 478         info->default_rxportconf.burst_size = 64;
 479         info->default_txportconf.burst_size = 64;
 480         if (priv->link_speed_capa & ETH_LINK_SPEED_100G) {
 481                 info->default_rxportconf.nb_queues = 16;
 482                 info->default_txportconf.nb_queues = 16;
 483                 if (dev->data->nb_rx_queues > 2 ||
 484                     dev->data->nb_tx_queues > 2) {
 485                         /* Max Throughput. */
 486                         info->default_rxportconf.ring_size = 2048;
 487                         info->default_txportconf.ring_size = 2048;
 488                 }
 489         } else {
 490                 info->default_rxportconf.nb_queues = 8;
 491                 info->default_txportconf.nb_queues = 8;
 492                 if (dev->data->nb_rx_queues > 2 ||
 493                     dev->data->nb_tx_queues > 2) {
 494                         /* Max Throughput. */
 495                         info->default_rxportconf.ring_size = 4096;
 496                         info->default_txportconf.ring_size = 4096;
 497                 }
 498         }
 499 }
 500
 501 /**
 502  * Sets tx mbuf limiting parameters.
 503  *
 504  * @param dev
 505  *   Pointer to Ethernet device.
 506  * @param[out] info
 507  *   Info structure output buffer.
 508  */
 509 static void
 510 mlx5_set_txlimit_params(struct rte_eth_dev *dev, struct rte_eth_dev_info *info)
 511 {
 512         struct mlx5_priv *priv = dev->data->dev_private;
 513         struct mlx5_dev_config *config = &priv->config;
 514         unsigned int inlen;
 515         uint16_t nb_max;
 516
 517         inlen = (config->txq_inline_max == MLX5_ARG_UNSET) ?
 518                 MLX5_SEND_DEF_INLINE_LEN :
 519                 (unsigned int)config->txq_inline_max;
 520         assert(config->txq_inline_min >= 0);
 521         inlen = RTE_MAX(inlen, (unsigned int)config->txq_inline_min);
 522         inlen = RTE_MIN(inlen, MLX5_WQE_SIZE_MAX +
 523                                MLX5_ESEG_MIN_INLINE_SIZE -
 524                                MLX5_WQE_CSEG_SIZE -
 525                                MLX5_WQE_ESEG_SIZE -
 526                                MLX5_WQE_DSEG_SIZE * 2);
 527         nb_max = (MLX5_WQE_SIZE_MAX +
 528                   MLX5_ESEG_MIN_INLINE_SIZE -
 529                   MLX5_WQE_CSEG_SIZE -
 530                   MLX5_WQE_ESEG_SIZE -
 531                   MLX5_WQE_DSEG_SIZE -
 532                   inlen) / MLX5_WSEG_SIZE;
 533         info->tx_desc_lim.nb_seg_max = nb_max;
 534         info->tx_desc_lim.nb_mtu_seg_max = nb_max;
 535 }
 536
 537 /**
 538  * DPDK callback to get information about the device.
 539  *
 540  * @param dev
 541  *   Pointer to Ethernet device structure.
 542  * @param[out] info
 543  *   Info structure output buffer.
 544  */
 545 void
 546 mlx5_dev_infos_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *info)
 547 {
 548         struct mlx5_priv *priv = dev->data->dev_private;
 549         struct mlx5_dev_config *config = &priv->config;
 550         unsigned int max;
 551
 552         /* FIXME: we should ask the device for these values. */
 553         info->min_rx_bufsize = 32;
 554         info->max_rx_pktlen = 65536;
 555         /*
 556          * Since we need one CQ per QP, the limit is the minimum number
 557          * between the two values.
 558          */
 559         max = RTE_MIN(priv->sh->device_attr.orig_attr.max_cq,
 560                       priv->sh->device_attr.orig_attr.max_qp);
 561         /* If max >= 65535 then max = 0, max_rx_queues is uint16_t. */
 562         if (max >= 65535)
 563                 max = 65535;
 564         info->max_rx_queues = max;
 565         info->max_tx_queues = max;
 566         info->max_mac_addrs = MLX5_MAX_UC_MAC_ADDRESSES;
 567         info->rx_queue_offload_capa = mlx5_get_rx_queue_offloads(dev);
 568         info->rx_offload_capa = (mlx5_get_rx_port_offloads() |
 569                                  info->rx_queue_offload_capa);
 570         info->tx_offload_capa = mlx5_get_tx_port_offloads(dev);
 571         info->if_index = mlx5_ifindex(dev);
 572         info->reta_size = priv->reta_idx_n ?
 573                 priv->reta_idx_n : config->ind_table_max_size;
 574         info->hash_key_size = MLX5_RSS_HASH_KEY_LEN;
 575         info->speed_capa = priv->link_speed_capa;
 576         info->flow_type_rss_offloads = ~MLX5_RSS_HF_MASK;
 577         mlx5_set_default_params(dev, info);
 578         mlx5_set_txlimit_params(dev, info);
 579         info->switch_info.name = dev->data->name;
 580         info->switch_info.domain_id = priv->domain_id;
 581         info->switch_info.port_id = priv->representor_id;
 582         if (priv->representor) {
 583                 unsigned int i = mlx5_dev_to_port_id(dev->device, NULL, 0);
 584                 uint16_t port_id[i];
 585
 586                 i = RTE_MIN(mlx5_dev_to_port_id(dev->device, port_id, i), i);
 587                 while (i--) {
 588                         struct mlx5_priv *opriv =
 589                                 rte_eth_devices[port_id[i]].data->dev_private;
 590
 591                         if (!opriv ||
 592                             opriv->representor ||
 593                             opriv->domain_id != priv->domain_id)
 594                                 continue;
 595                         /*
 596                          * Override switch name with that of the master
 597                          * device.
 598                          */
 599                         info->switch_info.name = opriv->dev_data->name;
 600                         break;
 601                 }
 602         }
 603 }
 604
 605 /**
 606  * Get device current raw clock counter
 607  *
 608  * @param dev
 609  *   Pointer to Ethernet device structure.
 610  * @param[out] time
 611  *   Current raw clock counter of the device.
 612  *
 613  * @return
 614  *   0 if the clock has correctly been read
 615  *   The value of errno in case of error
 616  */
 617 int
 618 mlx5_read_clock(struct rte_eth_dev *dev, uint64_t *clock)
 619 {
 620         struct mlx5_priv *priv = dev->data->dev_private;
 621         struct ibv_context *ctx = priv->sh->ctx;
 622         struct ibv_values_ex values;
 623         int err = 0;
 624
 625         values.comp_mask = IBV_VALUES_MASK_RAW_CLOCK;
 626         err = mlx5_glue->query_rt_values_ex(ctx, &values);
 627         if (err != 0) {
 628                 DRV_LOG(WARNING, "Could not query the clock !");
 629                 return err;
 630         }
 631         *clock = values.raw_clock.tv_nsec;
 632         return 0;
 633 }
 634
 635 /**
 636  * Get firmware version of a device.
 637  *
 638  * @param dev
 639  *   Ethernet device port.
 640  * @param fw_ver
 641  *   String output allocated by caller.
 642  * @param fw_size
 643  *   Size of the output string, including terminating null byte.
 644  *
 645  * @return
 646  *   0 on success, or the size of the non truncated string if too big.
 647  */
 648 int mlx5_fw_version_get(struct rte_eth_dev *dev, char *fw_ver, size_t fw_size)
 649 {
 650         struct mlx5_priv *priv = dev->data->dev_private;
 651         struct ibv_device_attr *attr = &priv->sh->device_attr.orig_attr;
 652         size_t size = strnlen(attr->fw_ver, sizeof(attr->fw_ver)) + 1;
 653
 654         if (fw_size < size)
 655                 return size;
 656         if (fw_ver != NULL)
 657                 strlcpy(fw_ver, attr->fw_ver, fw_size);
 658         return 0;
 659 }
 660
 661 /**
 662  * Get supported packet types.
 663  *
 664  * @param dev
 665  *   Pointer to Ethernet device structure.
 666  *
 667  * @return
 668  *   A pointer to the supported Packet types array.
 669  */
 670 const uint32_t *
 671 mlx5_dev_supported_ptypes_get(struct rte_eth_dev *dev)
 672 {
 673         static const uint32_t ptypes[] = {
 674                 /* refers to rxq_cq_to_pkt_type() */
 675                 RTE_PTYPE_L2_ETHER,
 676                 RTE_PTYPE_L3_IPV4_EXT_UNKNOWN,
 677                 RTE_PTYPE_L3_IPV6_EXT_UNKNOWN,
 678                 RTE_PTYPE_L4_NONFRAG,
 679                 RTE_PTYPE_L4_FRAG,
 680                 RTE_PTYPE_L4_TCP,
 681                 RTE_PTYPE_L4_UDP,
 682                 RTE_PTYPE_INNER_L3_IPV4_EXT_UNKNOWN,
 683                 RTE_PTYPE_INNER_L3_IPV6_EXT_UNKNOWN,
 684                 RTE_PTYPE_INNER_L4_NONFRAG,
 685                 RTE_PTYPE_INNER_L4_FRAG,
 686                 RTE_PTYPE_INNER_L4_TCP,
 687                 RTE_PTYPE_INNER_L4_UDP,
 688                 RTE_PTYPE_UNKNOWN
 689         };
 690
 691         if (dev->rx_pkt_burst == mlx5_rx_burst ||
 692             dev->rx_pkt_burst == mlx5_rx_burst_mprq ||
 693             dev->rx_pkt_burst == mlx5_rx_burst_vec)
 694                 return ptypes;
 695         return NULL;
 696 }
 697
 698 /**
 699  * Retrieve the master device for representor in the same switch domain.
 700  *
 701  * @param dev
 702  *   Pointer to representor Ethernet device structure.
 703  *
 704  * @return
 705  *   Master device structure  on success, NULL otherwise.
 706  */
 707
 708 static struct rte_eth_dev *
 709 mlx5_find_master_dev(struct rte_eth_dev *dev)
 710 {
 711         struct mlx5_priv *priv;
 712         uint16_t port_id;
 713         uint16_t domain_id;
 714
 715         priv = dev->data->dev_private;
 716         domain_id = priv->domain_id;
 717         assert(priv->representor);
 718         RTE_ETH_FOREACH_DEV_OF(port_id, dev->device) {
 719                 priv = rte_eth_devices[port_id].data->dev_private;
 720                 if (priv &&
 721                     priv->master &&
 722                     priv->domain_id == domain_id)
 723                         return &rte_eth_devices[port_id];
 724         }
 725         return NULL;
 726 }
 727
 728 /**
 729  * DPDK callback to retrieve physical link information.
 730  *
 731  * @param dev
 732  *   Pointer to Ethernet device structure.
 733  * @param[out] link
 734  *   Storage for current link status.
 735  *
 736  * @return
 737  *   0 on success, a negative errno value otherwise and rte_errno is set.
 738  */
 739 static int
 740 mlx5_link_update_unlocked_gset(struct rte_eth_dev *dev,
 741                                struct rte_eth_link *link)
 742 {
 743         struct mlx5_priv *priv = dev->data->dev_private;
 744         struct ethtool_cmd edata = {
 745                 .cmd = ETHTOOL_GSET /* Deprecated since Linux v4.5. */
 746         };
 747         struct ifreq ifr;
 748         struct rte_eth_link dev_link;
 749         int link_speed = 0;
 750         int ret;
 751
 752         ret = mlx5_ifreq(dev, SIOCGIFFLAGS, &ifr);
 753         if (ret) {
 754                 DRV_LOG(WARNING, "port %u ioctl(SIOCGIFFLAGS) failed: %s",
 755                         dev->data->port_id, strerror(rte_errno));
 756                 return ret;
 757         }
 758         dev_link = (struct rte_eth_link) {
 759                 .link_status = ((ifr.ifr_flags & IFF_UP) &&
 760                                 (ifr.ifr_flags & IFF_RUNNING)),
 761         };
 762         ifr = (struct ifreq) {
 763                 .ifr_data = (void *)&edata,
 764         };
 765         ret = mlx5_ifreq(dev, SIOCETHTOOL, &ifr);
 766         if (ret) {
 767                 if (ret == -ENOTSUP && priv->representor) {
 768                         struct rte_eth_dev *master;
 769
 770                         /*
 771                          * For representors we can try to inherit link
 772                          * settings from the master device. Actually
 773                          * link settings do not make a lot of sense
 774                          * for representors due to missing physical
 775                          * link. The old kernel drivers supported
 776                          * emulated settings query for representors,
 777                          * the new ones do not, so we have to add
 778                          * this code for compatibility issues.
 779                          */
 780                         master = mlx5_find_master_dev(dev);
 781                         if (master) {
 782                                 ifr = (struct ifreq) {
 783                                         .ifr_data = (void *)&edata,
 784                                 };
 785                                 ret = mlx5_ifreq(master, SIOCETHTOOL, &ifr);
 786                         }
 787                 }
 788                 if (ret) {
 789                         DRV_LOG(WARNING,
 790                                 "port %u ioctl(SIOCETHTOOL,"
 791                                 " ETHTOOL_GSET) failed: %s",
 792                                 dev->data->port_id, strerror(rte_errno));
 793                         return ret;
 794                 }
 795         }
 796         link_speed = ethtool_cmd_speed(&edata);
 797         if (link_speed == -1)
 798                 dev_link.link_speed = ETH_SPEED_NUM_NONE;
 799         else
 800                 dev_link.link_speed = link_speed;
 801         priv->link_speed_capa = 0;
 802         if (edata.supported & SUPPORTED_Autoneg)
 803                 priv->link_speed_capa |= ETH_LINK_SPEED_AUTONEG;
 804         if (edata.supported & (SUPPORTED_1000baseT_Full |
 805                                SUPPORTED_1000baseKX_Full))
 806                 priv->link_speed_capa |= ETH_LINK_SPEED_1G;
 807         if (edata.supported & SUPPORTED_10000baseKR_Full)
 808                 priv->link_speed_capa |= ETH_LINK_SPEED_10G;
 809         if (edata.supported & (SUPPORTED_40000baseKR4_Full |
 810                                SUPPORTED_40000baseCR4_Full |
 811                                SUPPORTED_40000baseSR4_Full |
 812                                SUPPORTED_40000baseLR4_Full))
 813                 priv->link_speed_capa |= ETH_LINK_SPEED_40G;
 814         dev_link.link_duplex = ((edata.duplex == DUPLEX_HALF) ?
 815                                 ETH_LINK_HALF_DUPLEX : ETH_LINK_FULL_DUPLEX);
 816         dev_link.link_autoneg = !(dev->data->dev_conf.link_speeds &
 817                         ETH_LINK_SPEED_FIXED);
 818         if (((dev_link.link_speed && !dev_link.link_status) ||
 819              (!dev_link.link_speed && dev_link.link_status))) {
 820                 rte_errno = EAGAIN;
 821                 return -rte_errno;
 822         }
 823         *link = dev_link;
 824         return 0;
 825 }
 826
 827 /**
 828  * Retrieve physical link information (unlocked version using new ioctl).
 829  *
 830  * @param dev
 831  *   Pointer to Ethernet device structure.
 832  * @param[out] link
 833  *   Storage for current link status.
 834  *
 835  * @return
 836  *   0 on success, a negative errno value otherwise and rte_errno is set.
 837  */
 838 static int
 839 mlx5_link_update_unlocked_gs(struct rte_eth_dev *dev,
 840                              struct rte_eth_link *link)
 841
 842 {
 843         struct mlx5_priv *priv = dev->data->dev_private;
 844         struct ethtool_link_settings gcmd = { .cmd = ETHTOOL_GLINKSETTINGS };
 845         struct ifreq ifr;
 846         struct rte_eth_link dev_link;
 847         struct rte_eth_dev *master = NULL;
 848         uint64_t sc;
 849         int ret;
 850
 851         ret = mlx5_ifreq(dev, SIOCGIFFLAGS, &ifr);
 852         if (ret) {
 853                 DRV_LOG(WARNING, "port %u ioctl(SIOCGIFFLAGS) failed: %s",
 854                         dev->data->port_id, strerror(rte_errno));
 855                 return ret;
 856         }
 857         dev_link = (struct rte_eth_link) {
 858                 .link_status = ((ifr.ifr_flags & IFF_UP) &&
 859                                 (ifr.ifr_flags & IFF_RUNNING)),
 860         };
 861         ifr = (struct ifreq) {
 862                 .ifr_data = (void *)&gcmd,
 863         };
 864         ret = mlx5_ifreq(dev, SIOCETHTOOL, &ifr);
 865         if (ret) {
 866                 if (ret == -ENOTSUP && priv->representor) {
 867                         /*
 868                          * For representors we can try to inherit link
 869                          * settings from the master device. Actually
 870                          * link settings do not make a lot of sense
 871                          * for representors due to missing physical
 872                          * link. The old kernel drivers supported
 873                          * emulated settings query for representors,
 874                          * the new ones do not, so we have to add
 875                          * this code for compatibility issues.
 876                          */
 877                         master = mlx5_find_master_dev(dev);
 878                         if (master) {
 879                                 ifr = (struct ifreq) {
 880                                         .ifr_data = (void *)&gcmd,
 881                                 };
 882                                 ret = mlx5_ifreq(master, SIOCETHTOOL, &ifr);
 883                         }
 884                 }
 885                 if (ret) {
 886                         DRV_LOG(DEBUG,
 887                                 "port %u ioctl(SIOCETHTOOL,"
 888                                 " ETHTOOL_GLINKSETTINGS) failed: %s",
 889                                 dev->data->port_id, strerror(rte_errno));
 890                         return ret;
 891                 }
 892
 893         }
 894         gcmd.link_mode_masks_nwords = -gcmd.link_mode_masks_nwords;
 895
 896         alignas(struct ethtool_link_settings)
 897         uint8_t data[offsetof(struct ethtool_link_settings, link_mode_masks) +
 898                      sizeof(uint32_t) * gcmd.link_mode_masks_nwords * 3];
 899         struct ethtool_link_settings *ecmd = (void *)data;
 900
 901         *ecmd = gcmd;
 902         ifr.ifr_data = (void *)ecmd;
 903         ret = mlx5_ifreq(master ? master : dev, SIOCETHTOOL, &ifr);
 904         if (ret) {
 905                 DRV_LOG(DEBUG,
 906                         "port %u ioctl(SIOCETHTOOL,"
 907                         "ETHTOOL_GLINKSETTINGS) failed: %s",
 908                         dev->data->port_id, strerror(rte_errno));
 909                 return ret;
 910         }
 911         dev_link.link_speed = ecmd->speed;
 912         sc = ecmd->link_mode_masks[0] |
 913                 ((uint64_t)ecmd->link_mode_masks[1] << 32);
 914         priv->link_speed_capa = 0;
 915         if (sc & MLX5_BITSHIFT(ETHTOOL_LINK_MODE_Autoneg_BIT))
 916                 priv->link_speed_capa |= ETH_LINK_SPEED_AUTONEG;
 917         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_1000baseT_Full_BIT) |
 918                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_1000baseKX_Full_BIT)))
 919                 priv->link_speed_capa |= ETH_LINK_SPEED_1G;
 920         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT) |
 921                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT) |
 922                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_10000baseR_FEC_BIT)))
 923                 priv->link_speed_capa |= ETH_LINK_SPEED_10G;
 924         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_20000baseMLD2_Full_BIT) |
 925                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_20000baseKR2_Full_BIT)))
 926                 priv->link_speed_capa |= ETH_LINK_SPEED_20G;
 927         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT) |
 928                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT) |
 929                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT) |
 930                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT)))
 931                 priv->link_speed_capa |= ETH_LINK_SPEED_40G;
 932         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_56000baseKR4_Full_BIT) |
 933                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_56000baseCR4_Full_BIT) |
 934                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_56000baseSR4_Full_BIT) |
 935                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_56000baseLR4_Full_BIT)))
 936                 priv->link_speed_capa |= ETH_LINK_SPEED_56G;
 937         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_25000baseCR_Full_BIT) |
 938                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_25000baseKR_Full_BIT) |
 939                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_25000baseSR_Full_BIT)))
 940                 priv->link_speed_capa |= ETH_LINK_SPEED_25G;
 941         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT) |
 942                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT)))
 943                 priv->link_speed_capa |= ETH_LINK_SPEED_50G;
 944         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT) |
 945                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT) |
 946                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT) |
 947                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT)))
 948                 priv->link_speed_capa |= ETH_LINK_SPEED_100G;
 949         dev_link.link_duplex = ((ecmd->duplex == DUPLEX_HALF) ?
 950                                 ETH_LINK_HALF_DUPLEX : ETH_LINK_FULL_DUPLEX);
 951         dev_link.link_autoneg = !(dev->data->dev_conf.link_speeds &
 952                                   ETH_LINK_SPEED_FIXED);
 953         if (((dev_link.link_speed && !dev_link.link_status) ||
 954              (!dev_link.link_speed && dev_link.link_status))) {
 955                 rte_errno = EAGAIN;
 956                 return -rte_errno;
 957         }
 958         *link = dev_link;
 959         return 0;
 960 }
 961
 962 /**
 963  * DPDK callback to retrieve physical link information.
 964  *
 965  * @param dev
 966  *   Pointer to Ethernet device structure.
 967  * @param wait_to_complete
 968  *   Wait for request completion.
 969  *
 970  * @return
 971  *   0 if link status was not updated, positive if it was, a negative errno
 972  *   value otherwise and rte_errno is set.
 973  */
 974 int
 975 mlx5_link_update(struct rte_eth_dev *dev, int wait_to_complete)
 976 {
 977         int ret;
 978         struct rte_eth_link dev_link;
 979         time_t start_time = time(NULL);
 980
 981         do {
 982                 ret = mlx5_link_update_unlocked_gs(dev, &dev_link);
 983                 if (ret == -ENOTSUP)
 984                         ret = mlx5_link_update_unlocked_gset(dev, &dev_link);
 985                 if (ret == 0)
 986                         break;
 987                 /* Handle wait to complete situation. */
 988                 if (wait_to_complete && ret == -EAGAIN) {
 989                         if (abs((int)difftime(time(NULL), start_time)) <
 990                             MLX5_LINK_STATUS_TIMEOUT) {
 991                                 usleep(0);
 992                                 continue;
 993                         } else {
 994                                 rte_errno = EBUSY;
 995                                 return -rte_errno;
 996                         }
 997                 } else if (ret < 0) {
 998                         return ret;
 999                 }
1000         } while (wait_to_complete);
1001         ret = !!memcmp(&dev->data->dev_link, &dev_link,
1002                        sizeof(struct rte_eth_link));
1003         dev->data->dev_link = dev_link;
1004         return ret;
1005 }
1006
1007 /**
1008  * DPDK callback to change the MTU.
1009  *
1010  * @param dev
1011  *   Pointer to Ethernet device structure.
1012  * @param in_mtu
1013  *   New MTU.
1014  *
1015  * @return
1016  *   0 on success, a negative errno value otherwise and rte_errno is set.
1017  */
1018 int
1019 mlx5_dev_set_mtu(struct rte_eth_dev *dev, uint16_t mtu)
1020 {
1021         struct mlx5_priv *priv = dev->data->dev_private;
1022         uint16_t kern_mtu = 0;
1023         int ret;
1024
1025         ret = mlx5_get_mtu(dev, &kern_mtu);
1026         if (ret)
1027                 return ret;
1028         /* Set kernel interface MTU first. */
1029         ret = mlx5_set_mtu(dev, mtu);
1030         if (ret)
1031                 return ret;
1032         ret = mlx5_get_mtu(dev, &kern_mtu);
1033         if (ret)
1034                 return ret;
1035         if (kern_mtu == mtu) {
1036                 priv->mtu = mtu;
1037                 DRV_LOG(DEBUG, "port %u adapter MTU set to %u",
1038                         dev->data->port_id, mtu);
1039                 return 0;
1040         }
1041         rte_errno = EAGAIN;
1042         return -rte_errno;
1043 }
1044
1045 /**
1046  * DPDK callback to get flow control status.
1047  *
1048  * @param dev
1049  *   Pointer to Ethernet device structure.
1050  * @param[out] fc_conf
1051  *   Flow control output buffer.
1052  *
1053  * @return
1054  *   0 on success, a negative errno value otherwise and rte_errno is set.
1055  */
1056 int
1057 mlx5_dev_get_flow_ctrl(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
1058 {
1059         struct ifreq ifr;
1060         struct ethtool_pauseparam ethpause = {
1061                 .cmd = ETHTOOL_GPAUSEPARAM
1062         };
1063         int ret;
1064
1065         ifr.ifr_data = (void *)&ethpause;
1066         ret = mlx5_ifreq(dev, SIOCETHTOOL, &ifr);
1067         if (ret) {
1068                 DRV_LOG(WARNING,
1069                         "port %u ioctl(SIOCETHTOOL, ETHTOOL_GPAUSEPARAM) failed:"
1070                         " %s",
1071                         dev->data->port_id, strerror(rte_errno));
1072                 return ret;
1073         }
1074         fc_conf->autoneg = ethpause.autoneg;
1075         if (ethpause.rx_pause && ethpause.tx_pause)
1076                 fc_conf->mode = RTE_FC_FULL;
1077         else if (ethpause.rx_pause)
1078                 fc_conf->mode = RTE_FC_RX_PAUSE;
1079         else if (ethpause.tx_pause)
1080                 fc_conf->mode = RTE_FC_TX_PAUSE;
1081         else
1082                 fc_conf->mode = RTE_FC_NONE;
1083         return 0;
1084 }
1085
1086 /**
1087  * DPDK callback to modify flow control parameters.
1088  *
1089  * @param dev
1090  *   Pointer to Ethernet device structure.
1091  * @param[in] fc_conf
1092  *   Flow control parameters.
1093  *
1094  * @return
1095  *   0 on success, a negative errno value otherwise and rte_errno is set.
1096  */
1097 int
1098 mlx5_dev_set_flow_ctrl(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
1099 {
1100         struct ifreq ifr;
1101         struct ethtool_pauseparam ethpause = {
1102                 .cmd = ETHTOOL_SPAUSEPARAM
1103         };
1104         int ret;
1105
1106         ifr.ifr_data = (void *)&ethpause;
1107         ethpause.autoneg = fc_conf->autoneg;
1108         if (((fc_conf->mode & RTE_FC_FULL) == RTE_FC_FULL) ||
1109             (fc_conf->mode & RTE_FC_RX_PAUSE))
1110                 ethpause.rx_pause = 1;
1111         else
1112                 ethpause.rx_pause = 0;
1113
1114         if (((fc_conf->mode & RTE_FC_FULL) == RTE_FC_FULL) ||
1115             (fc_conf->mode & RTE_FC_TX_PAUSE))
1116                 ethpause.tx_pause = 1;
1117         else
1118                 ethpause.tx_pause = 0;
1119         ret = mlx5_ifreq(dev, SIOCETHTOOL, &ifr);
1120         if (ret) {
1121                 DRV_LOG(WARNING,
1122                         "port %u ioctl(SIOCETHTOOL, ETHTOOL_SPAUSEPARAM)"
1123                         " failed: %s",
1124                         dev->data->port_id, strerror(rte_errno));
1125                 return ret;
1126         }
1127         return 0;
1128 }
1129
1130 /**
1131  * Get PCI information from struct ibv_device.
1132  *
1133  * @param device
1134  *   Pointer to Ethernet device structure.
1135  * @param[out] pci_addr
1136  *   PCI bus address output buffer.
1137  *
1138  * @return
1139  *   0 on success, a negative errno value otherwise and rte_errno is set.
1140  */
1141 int
1142 mlx5_ibv_device_to_pci_addr(const struct ibv_device *device,
1143                             struct rte_pci_addr *pci_addr)
1144 {
1145         FILE *file;
1146         char line[32];
1147         MKSTR(path, "%s/device/uevent", device->ibdev_path);
1148
1149         file = fopen(path, "rb");
1150         if (file == NULL) {
1151                 rte_errno = errno;
1152                 return -rte_errno;
1153         }
1154         while (fgets(line, sizeof(line), file) == line) {
1155                 size_t len = strlen(line);
1156                 int ret;
1157
1158                 /* Truncate long lines. */
1159                 if (len == (sizeof(line) - 1))
1160                         while (line[(len - 1)] != '\n') {
1161                                 ret = fgetc(file);
1162                                 if (ret == EOF)
1163                                         break;
1164                                 line[(len - 1)] = ret;
1165                         }
1166                 /* Extract information. */
1167                 if (sscanf(line,
1168                            "PCI_SLOT_NAME="
1169                            "%" SCNx32 ":%" SCNx8 ":%" SCNx8 ".%" SCNx8 "\n",
1170                            &pci_addr->domain,
1171                            &pci_addr->bus,
1172                            &pci_addr->devid,
1173                            &pci_addr->function) == 4) {
1174                         ret = 0;
1175                         break;
1176                 }
1177         }
1178         fclose(file);
1179         return 0;
1180 }
1181
1182 /**
1183  * Handle asynchronous removal event for entire multiport device.
1184  *
1185  * @param sh
1186  *   Infiniband device shared context.
1187  */
1188 static void
1189 mlx5_dev_interrupt_device_fatal(struct mlx5_ibv_shared *sh)
1190 {
1191         uint32_t i;
1192
1193         for (i = 0; i < sh->max_port; ++i) {
1194                 struct rte_eth_dev *dev;
1195
1196                 if (sh->port[i].ih_port_id >= RTE_MAX_ETHPORTS) {
1197                         /*
1198                          * Or not existing port either no
1199                          * handler installed for this port.
1200                          */
1201                         continue;
1202                 }
1203                 dev = &rte_eth_devices[sh->port[i].ih_port_id];
1204                 assert(dev);
1205                 if (dev->data->dev_conf.intr_conf.rmv)
1206                         _rte_eth_dev_callback_process
1207                                 (dev, RTE_ETH_EVENT_INTR_RMV, NULL);
1208         }
1209 }
1210
1211 /**
1212  * Handle shared asynchronous events the NIC (removal event
1213  * and link status change). Supports multiport IB device.
1214  *
1215  * @param cb_arg
1216  *   Callback argument.
1217  */
1218 void
1219 mlx5_dev_interrupt_handler(void *cb_arg)
1220 {
1221         struct mlx5_ibv_shared *sh = cb_arg;
1222         struct ibv_async_event event;
1223
1224         /* Read all message from the IB device and acknowledge them. */
1225         for (;;) {
1226                 struct rte_eth_dev *dev;
1227                 uint32_t tmp;
1228
1229                 if (mlx5_glue->get_async_event(sh->ctx, &event))
1230                         break;
1231                 /* Retrieve and check IB port index. */
1232                 tmp = (uint32_t)event.element.port_num;
1233                 if (!tmp && event.event_type == IBV_EVENT_DEVICE_FATAL) {
1234                         /*
1235                          * The DEVICE_FATAL event is called once for
1236                          * entire device without port specifying.
1237                          * We should notify all existing ports.
1238                          */
1239                         mlx5_glue->ack_async_event(&event);
1240                         mlx5_dev_interrupt_device_fatal(sh);
1241                         continue;
1242                 }
1243                 assert(tmp && (tmp <= sh->max_port));
1244                 if (!tmp) {
1245                         /* Unsupported devive level event. */
1246                         mlx5_glue->ack_async_event(&event);
1247                         DRV_LOG(DEBUG,
1248                                 "unsupported common event (type %d)",
1249                                 event.event_type);
1250                         continue;
1251                 }
1252                 if (tmp > sh->max_port) {
1253                         /* Invalid IB port index. */
1254                         mlx5_glue->ack_async_event(&event);
1255                         DRV_LOG(DEBUG,
1256                                 "cannot handle an event (type %d)"
1257                                 "due to invalid IB port index (%u)",
1258                                 event.event_type, tmp);
1259                         continue;
1260                 }
1261                 if (sh->port[tmp - 1].ih_port_id >= RTE_MAX_ETHPORTS) {
1262                         /* No handler installed. */
1263                         mlx5_glue->ack_async_event(&event);
1264                         DRV_LOG(DEBUG,
1265                                 "cannot handle an event (type %d)"
1266                                 "due to no handler installed for port %u",
1267                                 event.event_type, tmp);
1268                         continue;
1269                 }
1270                 /* Retrieve ethernet device descriptor. */
1271                 tmp = sh->port[tmp - 1].ih_port_id;
1272                 dev = &rte_eth_devices[tmp];
1273                 assert(dev);
1274                 if ((event.event_type == IBV_EVENT_PORT_ACTIVE ||
1275                      event.event_type == IBV_EVENT_PORT_ERR) &&
1276                         dev->data->dev_conf.intr_conf.lsc) {
1277                         mlx5_glue->ack_async_event(&event);
1278                         if (mlx5_link_update(dev, 0) == -EAGAIN) {
1279                                 usleep(0);
1280                                 continue;
1281                         }
1282                         _rte_eth_dev_callback_process
1283                                 (dev, RTE_ETH_EVENT_INTR_LSC, NULL);
1284                         continue;
1285                 }
1286                 DRV_LOG(DEBUG,
1287                         "port %u cannot handle an unknown event (type %d)",
1288                         dev->data->port_id, event.event_type);
1289                 mlx5_glue->ack_async_event(&event);
1290         }
1291 }
1292
1293 /*
1294  * Unregister callback handler safely. The handler may be active
1295  * while we are trying to unregister it, in this case code -EAGAIN
1296  * is returned by rte_intr_callback_unregister(). This routine checks
1297  * the return code and tries to unregister handler again.
1298  *
1299  * @param handle
1300  *   interrupt handle
1301  * @param cb_fn
1302  *   pointer to callback routine
1303  * @cb_arg
1304  *   opaque callback parameter
1305  */
1306 void
1307 mlx5_intr_callback_unregister(const struct rte_intr_handle *handle,
1308                               rte_intr_callback_fn cb_fn, void *cb_arg)
1309 {
1310         /*
1311          * Try to reduce timeout management overhead by not calling
1312          * the timer related routines on the first iteration. If the
1313          * unregistering succeeds on first call there will be no
1314          * timer calls at all.
1315          */
1316         uint64_t twait = 0;
1317         uint64_t start = 0;
1318
1319         do {
1320                 int ret;
1321
1322                 ret = rte_intr_callback_unregister(handle, cb_fn, cb_arg);
1323                 if (ret >= 0)
1324                         return;
1325                 if (ret != -EAGAIN) {
1326                         DRV_LOG(INFO, "failed to unregister interrupt"
1327                                       " handler (error: %d)", ret);
1328                         assert(false);
1329                         return;
1330                 }
1331                 if (twait) {
1332                         struct timespec onems;
1333
1334                         /* Wait one millisecond and try again. */
1335                         onems.tv_sec = 0;
1336                         onems.tv_nsec = NS_PER_S / MS_PER_S;
1337                         nanosleep(&onems, 0);
1338                         /* Check whether one second elapsed. */
1339                         if ((rte_get_timer_cycles() - start) <= twait)
1340                                 continue;
1341                 } else {
1342                         /*
1343                          * We get the amount of timer ticks for one second.
1344                          * If this amount elapsed it means we spent one
1345                          * second in waiting. This branch is executed once
1346                          * on first iteration.
1347                          */
1348                         twait = rte_get_timer_hz();
1349                         assert(twait);
1350                 }
1351                 /*
1352                  * Timeout elapsed, show message (once a second) and retry.
1353                  * We have no other acceptable option here, if we ignore
1354                  * the unregistering return code the handler will not
1355                  * be unregistered, fd will be closed and we may get the
1356                  * crush. Hanging and messaging in the loop seems not to be
1357                  * the worst choice.
1358                  */
1359                 DRV_LOG(INFO, "Retrying to unregister interrupt handler");
1360                 start = rte_get_timer_cycles();
1361         } while (true);
1362 }
1363
1364 /**
1365  * Handle DEVX interrupts from the NIC.
1366  * This function is probably called from the DPDK host thread.
1367  *
1368  * @param cb_arg
1369  *   Callback argument.
1370  */
1371 void
1372 mlx5_dev_interrupt_handler_devx(void *cb_arg)
1373 {
1374 #ifndef HAVE_IBV_DEVX_ASYNC
1375         (void)cb_arg;
1376         return;
1377 #else
1378         struct mlx5_ibv_shared *sh = cb_arg;
1379         union {
1380                 struct mlx5dv_devx_async_cmd_hdr cmd_resp;
1381                 uint8_t buf[MLX5_ST_SZ_BYTES(query_flow_counter_out) +
1382                             MLX5_ST_SZ_BYTES(traffic_counter) +
1383                             sizeof(struct mlx5dv_devx_async_cmd_hdr)];
1384         } out;
1385         uint8_t *buf = out.buf + sizeof(out.cmd_resp);
1386
1387         while (!mlx5_glue->devx_get_async_cmd_comp(sh->devx_comp,
1388                                                    &out.cmd_resp,
1389                                                    sizeof(out.buf)))
1390                 mlx5_flow_async_pool_query_handle
1391                         (sh, (uint64_t)out.cmd_resp.wr_id,
1392                          mlx5_devx_get_out_command_status(buf));
1393 #endif /* HAVE_IBV_DEVX_ASYNC */
1394 }
1395
1396 /**
1397  * Uninstall shared asynchronous device events handler.
1398  * This function is implemented to support event sharing
1399  * between multiple ports of single IB device.
1400  *
1401  * @param dev
1402  *   Pointer to Ethernet device.
1403  */
1404 static void
1405 mlx5_dev_shared_handler_uninstall(struct rte_eth_dev *dev)
1406 {
1407         struct mlx5_priv *priv = dev->data->dev_private;
1408         struct mlx5_ibv_shared *sh = priv->sh;
1409
1410         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
1411                 return;
1412         pthread_mutex_lock(&sh->intr_mutex);
1413         assert(priv->ibv_port);
1414         assert(priv->ibv_port <= sh->max_port);
1415         assert(dev->data->port_id < RTE_MAX_ETHPORTS);
1416         if (sh->port[priv->ibv_port - 1].ih_port_id >= RTE_MAX_ETHPORTS)
1417                 goto exit;
1418         assert(sh->port[priv->ibv_port - 1].ih_port_id ==
1419                                         (uint32_t)dev->data->port_id);
1420         assert(sh->intr_cnt);
1421         sh->port[priv->ibv_port - 1].ih_port_id = RTE_MAX_ETHPORTS;
1422         if (!sh->intr_cnt || --sh->intr_cnt)
1423                 goto exit;
1424         mlx5_intr_callback_unregister(&sh->intr_handle,
1425                                      mlx5_dev_interrupt_handler, sh);
1426         sh->intr_handle.fd = 0;
1427         sh->intr_handle.type = RTE_INTR_HANDLE_UNKNOWN;
1428         if (sh->intr_handle_devx.fd) {
1429                 rte_intr_callback_unregister(&sh->intr_handle_devx,
1430                                              mlx5_dev_interrupt_handler_devx,
1431                                              sh);
1432                 sh->intr_handle_devx.fd = 0;
1433                 sh->intr_handle_devx.type = RTE_INTR_HANDLE_UNKNOWN;
1434         }
1435         if (sh->devx_comp) {
1436                 mlx5_glue->devx_destroy_cmd_comp(sh->devx_comp);
1437                 sh->devx_comp = NULL;
1438         }
1439 exit:
1440         pthread_mutex_unlock(&sh->intr_mutex);
1441 }
1442
1443 /**
1444  * Install shared asynchronous device events handler.
1445  * This function is implemented to support event sharing
1446  * between multiple ports of single IB device.
1447  *
1448  * @param dev
1449  *   Pointer to Ethernet device.
1450  */
1451 static void
1452 mlx5_dev_shared_handler_install(struct rte_eth_dev *dev)
1453 {
1454         struct mlx5_priv *priv = dev->data->dev_private;
1455         struct mlx5_ibv_shared *sh = priv->sh;
1456         int ret;
1457         int flags;
1458
1459         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
1460                 return;
1461         pthread_mutex_lock(&sh->intr_mutex);
1462         assert(priv->ibv_port);
1463         assert(priv->ibv_port <= sh->max_port);
1464         assert(dev->data->port_id < RTE_MAX_ETHPORTS);
1465         if (sh->port[priv->ibv_port - 1].ih_port_id < RTE_MAX_ETHPORTS) {
1466                 /* The handler is already installed for this port. */
1467                 assert(sh->intr_cnt);
1468                 goto exit;
1469         }
1470         sh->port[priv->ibv_port - 1].ih_port_id = (uint32_t)dev->data->port_id;
1471         if (sh->intr_cnt) {
1472                 sh->intr_cnt++;
1473                 goto exit;
1474         }
1475         /* No shared handler installed. */
1476         assert(sh->ctx->async_fd > 0);
1477         flags = fcntl(sh->ctx->async_fd, F_GETFL);
1478         ret = fcntl(sh->ctx->async_fd, F_SETFL, flags | O_NONBLOCK);
1479         if (ret) {
1480                 DRV_LOG(INFO, "failed to change file descriptor"
1481                               " async event queue");
1482                 goto error;
1483         }
1484         sh->intr_handle.fd = sh->ctx->async_fd;
1485         sh->intr_handle.type = RTE_INTR_HANDLE_EXT;
1486         rte_intr_callback_register(&sh->intr_handle,
1487                                    mlx5_dev_interrupt_handler, sh);
1488         if (priv->config.devx) {
1489 #ifndef HAVE_IBV_DEVX_ASYNC
1490                 goto error_unregister;
1491 #else
1492                 sh->devx_comp = mlx5_glue->devx_create_cmd_comp(sh->ctx);
1493                 if (sh->devx_comp) {
1494                         flags = fcntl(sh->devx_comp->fd, F_GETFL);
1495                         ret = fcntl(sh->devx_comp->fd, F_SETFL,
1496                                     flags | O_NONBLOCK);
1497                         if (ret) {
1498                                 DRV_LOG(INFO, "failed to change file descriptor"
1499                                               " devx async event queue");
1500                                 goto error_unregister;
1501                         }
1502                         sh->intr_handle_devx.fd = sh->devx_comp->fd;
1503                         sh->intr_handle_devx.type = RTE_INTR_HANDLE_EXT;
1504                         rte_intr_callback_register
1505                                 (&sh->intr_handle_devx,
1506                                  mlx5_dev_interrupt_handler_devx, sh);
1507                 } else {
1508                         DRV_LOG(INFO, "failed to create devx async command "
1509                                 "completion");
1510                         goto error_unregister;
1511                 }
1512 #endif /* HAVE_IBV_DEVX_ASYNC */
1513         }
1514         sh->intr_cnt++;
1515         goto exit;
1516 error_unregister:
1517         rte_intr_callback_unregister(&sh->intr_handle,
1518                                      mlx5_dev_interrupt_handler, sh);
1519 error:
1520         /* Indicate there will be no interrupts. */
1521         dev->data->dev_conf.intr_conf.lsc = 0;
1522         dev->data->dev_conf.intr_conf.rmv = 0;
1523         sh->intr_handle.fd = 0;
1524         sh->intr_handle.type = RTE_INTR_HANDLE_UNKNOWN;
1525         sh->port[priv->ibv_port - 1].ih_port_id = RTE_MAX_ETHPORTS;
1526 exit:
1527         pthread_mutex_unlock(&sh->intr_mutex);
1528 }
1529
1530 /**
1531  * Uninstall interrupt handler.
1532  *
1533  * @param dev
1534  *   Pointer to Ethernet device.
1535  */
1536 void
1537 mlx5_dev_interrupt_handler_uninstall(struct rte_eth_dev *dev)
1538 {
1539         mlx5_dev_shared_handler_uninstall(dev);
1540 }
1541
1542 /**
1543  * Install interrupt handler.
1544  *
1545  * @param dev
1546  *   Pointer to Ethernet device.
1547  */
1548 void
1549 mlx5_dev_interrupt_handler_install(struct rte_eth_dev *dev)
1550 {
1551         mlx5_dev_shared_handler_install(dev);
1552 }
1553
1554 /**
1555  * DPDK callback to bring the link DOWN.
1556  *
1557  * @param dev
1558  *   Pointer to Ethernet device structure.
1559  *
1560  * @return
1561  *   0 on success, a negative errno value otherwise and rte_errno is set.
1562  */
1563 int
1564 mlx5_set_link_down(struct rte_eth_dev *dev)
1565 {
1566         return mlx5_set_flags(dev, ~IFF_UP, ~IFF_UP);
1567 }
1568
1569 /**
1570  * DPDK callback to bring the link UP.
1571  *
1572  * @param dev
1573  *   Pointer to Ethernet device structure.
1574  *
1575  * @return
1576  *   0 on success, a negative errno value otherwise and rte_errno is set.
1577  */
1578 int
1579 mlx5_set_link_up(struct rte_eth_dev *dev)
1580 {
1581         return mlx5_set_flags(dev, ~IFF_UP, IFF_UP);
1582 }
1583
1584 /**
1585  * Configure the RX function to use.
1586  *
1587  * @param dev
1588  *   Pointer to private data structure.
1589  *
1590  * @return
1591  *   Pointer to selected Rx burst function.
1592  */
1593 eth_rx_burst_t
1594 mlx5_select_rx_function(struct rte_eth_dev *dev)
1595 {
1596         eth_rx_burst_t rx_pkt_burst = mlx5_rx_burst;
1597
1598         assert(dev != NULL);
1599         if (mlx5_check_vec_rx_support(dev) > 0) {
1600                 rx_pkt_burst = mlx5_rx_burst_vec;
1601                 DRV_LOG(DEBUG, "port %u selected Rx vectorized function",
1602                         dev->data->port_id);
1603         } else if (mlx5_mprq_enabled(dev)) {
1604                 rx_pkt_burst = mlx5_rx_burst_mprq;
1605         }
1606         return rx_pkt_burst;
1607 }
1608
1609 /**
1610  * Check if mlx5 device was removed.
1611  *
1612  * @param dev
1613  *   Pointer to Ethernet device structure.
1614  *
1615  * @return
1616  *   1 when device is removed, otherwise 0.
1617  */
1618 int
1619 mlx5_is_removed(struct rte_eth_dev *dev)
1620 {
1621         struct ibv_device_attr device_attr;
1622         struct mlx5_priv *priv = dev->data->dev_private;
1623
1624         if (mlx5_glue->query_device(priv->sh->ctx, &device_attr) == EIO)
1625                 return 1;
1626         return 0;
1627 }
1628
1629 /**
1630  * Get port ID list of mlx5 instances sharing a common device.
1631  *
1632  * @param[in] dev
1633  *   Device to look for.
1634  * @param[out] port_list
1635  *   Result buffer for collected port IDs.
1636  * @param port_list_n
1637  *   Maximum number of entries in result buffer. If 0, @p port_list can be
1638  *   NULL.
1639  *
1640  * @return
1641  *   Number of matching instances regardless of the @p port_list_n
1642  *   parameter, 0 if none were found.
1643  */
1644 unsigned int
1645 mlx5_dev_to_port_id(const struct rte_device *dev, uint16_t *port_list,
1646                     unsigned int port_list_n)
1647 {
1648         uint16_t id;
1649         unsigned int n = 0;
1650
1651         RTE_ETH_FOREACH_DEV_OF(id, dev) {
1652                 if (n < port_list_n)
1653                         port_list[n] = id;
1654                 n++;
1655         }
1656         return n;
1657 }
1658
1659 /**
1660  * Get the E-Switch domain id this port belongs to.
1661  *
1662  * @param[in] port
1663  *   Device port id.
1664  * @param[out] es_domain_id
1665  *   E-Switch domain id.
1666  * @param[out] es_port_id
1667  *   The port id of the port in the E-Switch.
1668  *
1669  * @return
1670  *   0 on success, a negative errno value otherwise and rte_errno is set.
1671  */
1672 int
1673 mlx5_port_to_eswitch_info(uint16_t port,
1674                           uint16_t *es_domain_id, uint16_t *es_port_id)
1675 {
1676         struct rte_eth_dev *dev;
1677         struct mlx5_priv *priv;
1678
1679         if (port >= RTE_MAX_ETHPORTS) {
1680                 rte_errno = EINVAL;
1681                 return -rte_errno;
1682         }
1683         if (!rte_eth_dev_is_valid_port(port)) {
1684                 rte_errno = ENODEV;
1685                 return -rte_errno;
1686         }
1687         dev = &rte_eth_devices[port];
1688         priv = dev->data->dev_private;
1689         if (!(priv->representor || priv->master)) {
1690                 rte_errno = EINVAL;
1691                 return -rte_errno;
1692         }
1693         if (es_domain_id)
1694                 *es_domain_id = priv->domain_id;
1695         if (es_port_id)
1696                 *es_port_id = priv->vport_id;
1697         return 0;
1698 }
1699
1700 /**
1701  * Get switch information associated with network interface.
1702  *
1703  * @param ifindex
1704  *   Network interface index.
1705  * @param[out] info
1706  *   Switch information object, populated in case of success.
1707  *
1708  * @return
1709  *   0 on success, a negative errno value otherwise and rte_errno is set.
1710  */
1711 int
1712 mlx5_sysfs_switch_info(unsigned int ifindex, struct mlx5_switch_info *info)
1713 {
1714         char ifname[IF_NAMESIZE];
1715         char port_name[IF_NAMESIZE];
1716         FILE *file;
1717         struct mlx5_switch_info data = {
1718                 .master = 0,
1719                 .representor = 0,
1720                 .name_type = MLX5_PHYS_PORT_NAME_TYPE_NOTSET,
1721                 .port_name = 0,
1722                 .switch_id = 0,
1723         };
1724         DIR *dir;
1725         bool port_switch_id_set = false;
1726         bool device_dir = false;
1727         char c;
1728         int ret;
1729
1730         if (!if_indextoname(ifindex, ifname)) {
1731                 rte_errno = errno;
1732                 return -rte_errno;
1733         }
1734
1735         MKSTR(phys_port_name, "/sys/class/net/%s/phys_port_name",
1736               ifname);
1737         MKSTR(phys_switch_id, "/sys/class/net/%s/phys_switch_id",
1738               ifname);
1739         MKSTR(pci_device, "/sys/class/net/%s/device",
1740               ifname);
1741
1742         file = fopen(phys_port_name, "rb");
1743         if (file != NULL) {
1744                 ret = fscanf(file, "%s", port_name);
1745                 fclose(file);
1746                 if (ret == 1)
1747                         mlx5_translate_port_name(port_name, &data);
1748         }
1749         file = fopen(phys_switch_id, "rb");
1750         if (file == NULL) {
1751                 rte_errno = errno;
1752                 return -rte_errno;
1753         }
1754         port_switch_id_set =
1755                 fscanf(file, "%" SCNx64 "%c", &data.switch_id, &c) == 2 &&
1756                 c == '\n';
1757         fclose(file);
1758         dir = opendir(pci_device);
1759         if (dir != NULL) {
1760                 closedir(dir);
1761                 device_dir = true;
1762         }
1763         if (port_switch_id_set) {
1764                 /* We have some E-Switch configuration. */
1765                 mlx5_sysfs_check_switch_info(device_dir, &data);
1766         }
1767         *info = data;
1768         assert(!(data.master && data.representor));
1769         if (data.master && data.representor) {
1770                 DRV_LOG(ERR, "ifindex %u device is recognized as master"
1771                              " and as representor", ifindex);
1772                 rte_errno = ENODEV;
1773                 return -rte_errno;
1774         }
1775         return 0;
1776 }
1777
1778 /**
1779  * Analyze gathered port parameters via Netlink to recognize master
1780  * and representor devices for E-Switch configuration.
1781  *
1782  * @param[in] num_vf_set
1783  *   flag of presence of number of VFs port attribute.
1784  * @param[inout] switch_info
1785  *   Port information, including port name as a number and port name
1786  *   type if recognized
1787  *
1788  * @return
1789  *   master and representor flags are set in switch_info according to
1790  *   recognized parameters (if any).
1791  */
1792 void
1793 mlx5_nl_check_switch_info(bool num_vf_set,
1794                           struct mlx5_switch_info *switch_info)
1795 {
1796         switch (switch_info->name_type) {
1797         case MLX5_PHYS_PORT_NAME_TYPE_UNKNOWN:
1798                 /*
1799                  * Name is not recognized, assume the master,
1800                  * check the number of VFs key presence.
1801                  */
1802                 switch_info->master = num_vf_set;
1803                 break;
1804         case MLX5_PHYS_PORT_NAME_TYPE_NOTSET:
1805                 /*
1806                  * Name is not set, this assumes the legacy naming
1807                  * schema for master, just check if there is a
1808                  * number of VFs key.
1809                  */
1810                 switch_info->master = num_vf_set;
1811                 break;
1812         case MLX5_PHYS_PORT_NAME_TYPE_UPLINK:
1813                 /* New uplink naming schema recognized. */
1814                 switch_info->master = 1;
1815                 break;
1816         case MLX5_PHYS_PORT_NAME_TYPE_LEGACY:
1817                 /* Legacy representors naming schema. */
1818                 switch_info->representor = !num_vf_set;
1819                 break;
1820         case MLX5_PHYS_PORT_NAME_TYPE_PFVF:
1821                 /* New representors naming schema. */
1822                 switch_info->representor = 1;
1823                 break;
1824         }
1825 }
1826
1827 /**
1828  * Analyze gathered port parameters via sysfs to recognize master
1829  * and representor devices for E-Switch configuration.
1830  *
1831  * @param[in] device_dir
1832  *   flag of presence of "device" directory under port device key.
1833  * @param[inout] switch_info
1834  *   Port information, including port name as a number and port name
1835  *   type if recognized
1836  *
1837  * @return
1838  *   master and representor flags are set in switch_info according to
1839  *   recognized parameters (if any).
1840  */
1841 void
1842 mlx5_sysfs_check_switch_info(bool device_dir,
1843                              struct mlx5_switch_info *switch_info)
1844 {
1845         switch (switch_info->name_type) {
1846         case MLX5_PHYS_PORT_NAME_TYPE_UNKNOWN:
1847                 /*
1848                  * Name is not recognized, assume the master,
1849                  * check the device directory presence.
1850                  */
1851                 switch_info->master = device_dir;
1852                 break;
1853         case MLX5_PHYS_PORT_NAME_TYPE_NOTSET:
1854                 /*
1855                  * Name is not set, this assumes the legacy naming
1856                  * schema for master, just check if there is
1857                  * a device directory.
1858                  */
1859                 switch_info->master = device_dir;
1860                 break;
1861         case MLX5_PHYS_PORT_NAME_TYPE_UPLINK:
1862                 /* New uplink naming schema recognized. */
1863                 switch_info->master = 1;
1864                 break;
1865         case MLX5_PHYS_PORT_NAME_TYPE_LEGACY:
1866                 /* Legacy representors naming schema. */
1867                 switch_info->representor = !device_dir;
1868                 break;
1869         case MLX5_PHYS_PORT_NAME_TYPE_PFVF:
1870                 /* New representors naming schema. */
1871                 switch_info->representor = 1;
1872                 break;
1873         }
1874 }
1875
1876 /**
1877  * Extract port name, as a number, from sysfs or netlink information.
1878  *
1879  * @param[in] port_name_in
1880  *   String representing the port name.
1881  * @param[out] port_info_out
1882  *   Port information, including port name as a number and port name
1883  *   type if recognized
1884  *
1885  * @return
1886  *   port_name field set according to recognized name format.
1887  */
1888 void
1889 mlx5_translate_port_name(const char *port_name_in,
1890                          struct mlx5_switch_info *port_info_out)
1891 {
1892         char pf_c1, pf_c2, vf_c1, vf_c2;
1893         char *end;
1894         int sc_items;
1895
1896         /*
1897          * Check for port-name as a string of the form pf0vf0
1898          * (support kernel ver >= 5.0 or OFED ver >= 4.6).
1899          */
1900         sc_items = sscanf(port_name_in, "%c%c%d%c%c%d",
1901                           &pf_c1, &pf_c2, &port_info_out->pf_num,
1902                           &vf_c1, &vf_c2, &port_info_out->port_name);
1903         if (sc_items == 6 &&
1904             pf_c1 == 'p' && pf_c2 == 'f' &&
1905             vf_c1 == 'v' && vf_c2 == 'f') {
1906                 port_info_out->name_type = MLX5_PHYS_PORT_NAME_TYPE_PFVF;
1907                 return;
1908         }
1909         /*
1910          * Check for port-name as a string of the form p0
1911          * (support kernel ver >= 5.0, or OFED ver >= 4.6).
1912          */
1913         sc_items = sscanf(port_name_in, "%c%d",
1914                           &pf_c1, &port_info_out->port_name);
1915         if (sc_items == 2 && pf_c1 == 'p') {
1916                 port_info_out->name_type = MLX5_PHYS_PORT_NAME_TYPE_UPLINK;
1917                 return;
1918         }
1919         /* Check for port-name as a number (support kernel ver < 5.0 */
1920         errno = 0;
1921         port_info_out->port_name = strtol(port_name_in, &end, 0);
1922         if (!errno &&
1923             (size_t)(end - port_name_in) == strlen(port_name_in)) {
1924                 port_info_out->name_type = MLX5_PHYS_PORT_NAME_TYPE_LEGACY;
1925                 return;
1926         }
1927         port_info_out->name_type = MLX5_PHYS_PORT_NAME_TYPE_UNKNOWN;
1928         return;
1929 }