drivers/net/mlx5/mlx5_ethdev.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright 2015 6WIND S.A.
   3  * Copyright 2015 Mellanox Technologies, Ltd
   4  */
   5
   6 #define _GNU_SOURCE
   7
   8 #include <stddef.h>
   9 #include <assert.h>
  10 #include <inttypes.h>
  11 #include <unistd.h>
  12 #include <stdint.h>
  13 #include <stdio.h>
  14 #include <string.h>
  15 #include <stdlib.h>
  16 #include <errno.h>
  17 #include <dirent.h>
  18 #include <net/if.h>
  19 #include <sys/ioctl.h>
  20 #include <sys/socket.h>
  21 #include <netinet/in.h>
  22 #include <linux/ethtool.h>
  23 #include <linux/sockios.h>
  24 #include <fcntl.h>
  25 #include <stdalign.h>
  26 #include <sys/un.h>
  27 #include <time.h>
  28
  29 #include <rte_atomic.h>
  30 #include <rte_ethdev_driver.h>
  31 #include <rte_bus_pci.h>
  32 #include <rte_mbuf.h>
  33 #include <rte_common.h>
  34 #include <rte_interrupts.h>
  35 #include <rte_malloc.h>
  36 #include <rte_string_fns.h>
  37 #include <rte_rwlock.h>
  38
  39 #include "mlx5.h"
  40 #include "mlx5_glue.h"
  41 #include "mlx5_rxtx.h"
  42 #include "mlx5_utils.h"
  43
  44 /* 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 static int
 133 mlx5_get_master_ifname(const struct rte_eth_dev *dev,
 134                        char (*ifname)[IF_NAMESIZE])
 135 {
 136         struct priv *priv = dev->data->dev_private;
 137         DIR *dir;
 138         struct dirent *dent;
 139         unsigned int dev_type = 0;
 140         unsigned int dev_port_prev = ~0u;
 141         char match[IF_NAMESIZE] = "";
 142
 143         {
 144                 MKSTR(path, "%s/device/net", priv->ibdev_path);
 145
 146                 dir = opendir(path);
 147                 if (dir == NULL) {
 148                         rte_errno = errno;
 149                         return -rte_errno;
 150                 }
 151         }
 152         while ((dent = readdir(dir)) != NULL) {
 153                 char *name = dent->d_name;
 154                 FILE *file;
 155                 unsigned int dev_port;
 156                 int r;
 157
 158                 if ((name[0] == '.') &&
 159                     ((name[1] == '\0') ||
 160                      ((name[1] == '.') && (name[2] == '\0'))))
 161                         continue;
 162
 163                 MKSTR(path, "%s/device/net/%s/%s",
 164                       priv->ibdev_path, name,
 165                       (dev_type ? "dev_id" : "dev_port"));
 166
 167                 file = fopen(path, "rb");
 168                 if (file == NULL) {
 169                         if (errno != ENOENT)
 170                                 continue;
 171                         /*
 172                          * Switch to dev_id when dev_port does not exist as
 173                          * is the case with Linux kernel versions < 3.15.
 174                          */
 175 try_dev_id:
 176                         match[0] = '\0';
 177                         if (dev_type)
 178                                 break;
 179                         dev_type = 1;
 180                         dev_port_prev = ~0u;
 181                         rewinddir(dir);
 182                         continue;
 183                 }
 184                 r = fscanf(file, (dev_type ? "%x" : "%u"), &dev_port);
 185                 fclose(file);
 186                 if (r != 1)
 187                         continue;
 188                 /*
 189                  * Switch to dev_id when dev_port returns the same value for
 190                  * all ports. May happen when using a MOFED release older than
 191                  * 3.0 with a Linux kernel >= 3.15.
 192                  */
 193                 if (dev_port == dev_port_prev)
 194                         goto try_dev_id;
 195                 dev_port_prev = dev_port;
 196                 if (dev_port == 0)
 197                         strlcpy(match, name, sizeof(match));
 198         }
 199         closedir(dir);
 200         if (match[0] == '\0') {
 201                 rte_errno = ENOENT;
 202                 return -rte_errno;
 203         }
 204         strncpy(*ifname, match, sizeof(*ifname));
 205         return 0;
 206 }
 207
 208 /**
 209  * Get interface name from private structure.
 210  *
 211  * This is a port representor-aware version of mlx5_get_master_ifname().
 212  *
 213  * @param[in] dev
 214  *   Pointer to Ethernet device.
 215  * @param[out] ifname
 216  *   Interface name output buffer.
 217  *
 218  * @return
 219  *   0 on success, a negative errno value otherwise and rte_errno is set.
 220  */
 221 int
 222 mlx5_get_ifname(const struct rte_eth_dev *dev, char (*ifname)[IF_NAMESIZE])
 223 {
 224         struct priv *priv = dev->data->dev_private;
 225         unsigned int ifindex =
 226                 priv->nl_socket_rdma >= 0 ?
 227                 mlx5_nl_ifindex(priv->nl_socket_rdma, priv->ibdev_name) : 0;
 228
 229         if (!ifindex) {
 230                 if (!priv->representor)
 231                         return mlx5_get_master_ifname(dev, ifname);
 232                 rte_errno = ENXIO;
 233                 return -rte_errno;
 234         }
 235         if (if_indextoname(ifindex, &(*ifname)[0]))
 236                 return 0;
 237         rte_errno = errno;
 238         return -rte_errno;
 239 }
 240
 241 /**
 242  * Get the interface index from device name.
 243  *
 244  * @param[in] dev
 245  *   Pointer to Ethernet device.
 246  *
 247  * @return
 248  *   Nonzero interface index on success, zero otherwise and rte_errno is set.
 249  */
 250 unsigned int
 251 mlx5_ifindex(const struct rte_eth_dev *dev)
 252 {
 253         char ifname[IF_NAMESIZE];
 254         unsigned int ifindex;
 255
 256         if (mlx5_get_ifname(dev, &ifname))
 257                 return 0;
 258         ifindex = if_nametoindex(ifname);
 259         if (!ifindex)
 260                 rte_errno = errno;
 261         return ifindex;
 262 }
 263
 264 /**
 265  * Perform ifreq ioctl() on associated Ethernet device.
 266  *
 267  * @param[in] dev
 268  *   Pointer to Ethernet device.
 269  * @param req
 270  *   Request number to pass to ioctl().
 271  * @param[out] ifr
 272  *   Interface request structure output buffer.
 273  *
 274  * @return
 275  *   0 on success, a negative errno value otherwise and rte_errno is set.
 276  */
 277 int
 278 mlx5_ifreq(const struct rte_eth_dev *dev, int req, struct ifreq *ifr)
 279 {
 280         int sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP);
 281         int ret = 0;
 282
 283         if (sock == -1) {
 284                 rte_errno = errno;
 285                 return -rte_errno;
 286         }
 287         ret = mlx5_get_ifname(dev, &ifr->ifr_name);
 288         if (ret)
 289                 goto error;
 290         ret = ioctl(sock, req, ifr);
 291         if (ret == -1) {
 292                 rte_errno = errno;
 293                 goto error;
 294         }
 295         close(sock);
 296         return 0;
 297 error:
 298         close(sock);
 299         return -rte_errno;
 300 }
 301
 302 /**
 303  * Get device MTU.
 304  *
 305  * @param dev
 306  *   Pointer to Ethernet device.
 307  * @param[out] mtu
 308  *   MTU value output buffer.
 309  *
 310  * @return
 311  *   0 on success, a negative errno value otherwise and rte_errno is set.
 312  */
 313 int
 314 mlx5_get_mtu(struct rte_eth_dev *dev, uint16_t *mtu)
 315 {
 316         struct ifreq request;
 317         int ret = mlx5_ifreq(dev, SIOCGIFMTU, &request);
 318
 319         if (ret)
 320                 return ret;
 321         *mtu = request.ifr_mtu;
 322         return 0;
 323 }
 324
 325 /**
 326  * Set device MTU.
 327  *
 328  * @param dev
 329  *   Pointer to Ethernet device.
 330  * @param mtu
 331  *   MTU value to set.
 332  *
 333  * @return
 334  *   0 on success, a negative errno value otherwise and rte_errno is set.
 335  */
 336 static int
 337 mlx5_set_mtu(struct rte_eth_dev *dev, uint16_t mtu)
 338 {
 339         struct ifreq request = { .ifr_mtu = mtu, };
 340
 341         return mlx5_ifreq(dev, SIOCSIFMTU, &request);
 342 }
 343
 344 /**
 345  * Set device flags.
 346  *
 347  * @param dev
 348  *   Pointer to Ethernet device.
 349  * @param keep
 350  *   Bitmask for flags that must remain untouched.
 351  * @param flags
 352  *   Bitmask for flags to modify.
 353  *
 354  * @return
 355  *   0 on success, a negative errno value otherwise and rte_errno is set.
 356  */
 357 int
 358 mlx5_set_flags(struct rte_eth_dev *dev, unsigned int keep, unsigned int flags)
 359 {
 360         struct ifreq request;
 361         int ret = mlx5_ifreq(dev, SIOCGIFFLAGS, &request);
 362
 363         if (ret)
 364                 return ret;
 365         request.ifr_flags &= keep;
 366         request.ifr_flags |= flags & ~keep;
 367         return mlx5_ifreq(dev, SIOCSIFFLAGS, &request);
 368 }
 369
 370 /**
 371  * DPDK callback for Ethernet device configuration.
 372  *
 373  * @param dev
 374  *   Pointer to Ethernet device structure.
 375  *
 376  * @return
 377  *   0 on success, a negative errno value otherwise and rte_errno is set.
 378  */
 379 int
 380 mlx5_dev_configure(struct rte_eth_dev *dev)
 381 {
 382         struct priv *priv = dev->data->dev_private;
 383         unsigned int rxqs_n = dev->data->nb_rx_queues;
 384         unsigned int txqs_n = dev->data->nb_tx_queues;
 385         unsigned int i;
 386         unsigned int j;
 387         unsigned int reta_idx_n;
 388         const uint8_t use_app_rss_key =
 389                 !!dev->data->dev_conf.rx_adv_conf.rss_conf.rss_key;
 390         int ret = 0;
 391
 392         if (use_app_rss_key &&
 393             (dev->data->dev_conf.rx_adv_conf.rss_conf.rss_key_len !=
 394              MLX5_RSS_HASH_KEY_LEN)) {
 395                 DRV_LOG(ERR, "port %u RSS key len must be %s Bytes long",
 396                         dev->data->port_id, RTE_STR(MLX5_RSS_HASH_KEY_LEN));
 397                 rte_errno = EINVAL;
 398                 return -rte_errno;
 399         }
 400         priv->rss_conf.rss_key =
 401                 rte_realloc(priv->rss_conf.rss_key,
 402                             MLX5_RSS_HASH_KEY_LEN, 0);
 403         if (!priv->rss_conf.rss_key) {
 404                 DRV_LOG(ERR, "port %u cannot allocate RSS hash key memory (%u)",
 405                         dev->data->port_id, rxqs_n);
 406                 rte_errno = ENOMEM;
 407                 return -rte_errno;
 408         }
 409         memcpy(priv->rss_conf.rss_key,
 410                use_app_rss_key ?
 411                dev->data->dev_conf.rx_adv_conf.rss_conf.rss_key :
 412                rss_hash_default_key,
 413                MLX5_RSS_HASH_KEY_LEN);
 414         priv->rss_conf.rss_key_len = MLX5_RSS_HASH_KEY_LEN;
 415         priv->rss_conf.rss_hf = dev->data->dev_conf.rx_adv_conf.rss_conf.rss_hf;
 416         priv->rxqs = (void *)dev->data->rx_queues;
 417         priv->txqs = (void *)dev->data->tx_queues;
 418         if (txqs_n != priv->txqs_n) {
 419                 DRV_LOG(INFO, "port %u Tx queues number update: %u -> %u",
 420                         dev->data->port_id, priv->txqs_n, txqs_n);
 421                 priv->txqs_n = txqs_n;
 422         }
 423         if (rxqs_n > priv->config.ind_table_max_size) {
 424                 DRV_LOG(ERR, "port %u cannot handle this many Rx queues (%u)",
 425                         dev->data->port_id, rxqs_n);
 426                 rte_errno = EINVAL;
 427                 return -rte_errno;
 428         }
 429         if (rxqs_n == priv->rxqs_n)
 430                 return 0;
 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         /* If the requested number of RX queues is not a power of two, use the
 435          * maximum indirection table size for better balancing.
 436          * The result is always rounded to the next power of two. */
 437         reta_idx_n = (1 << log2above((rxqs_n & (rxqs_n - 1)) ?
 438                                      priv->config.ind_table_max_size :
 439                                      rxqs_n));
 440         ret = mlx5_rss_reta_index_resize(dev, reta_idx_n);
 441         if (ret)
 442                 return ret;
 443         /* When the number of RX queues is not a power of two, the remaining
 444          * table entries are padded with reused WQs and hashes are not spread
 445          * uniformly. */
 446         for (i = 0, j = 0; (i != reta_idx_n); ++i) {
 447                 (*priv->reta_idx)[i] = j;
 448                 if (++j == rxqs_n)
 449                         j = 0;
 450         }
 451         return 0;
 452 }
 453
 454 /**
 455  * Sets default tuning parameters.
 456  *
 457  * @param dev
 458  *   Pointer to Ethernet device.
 459  * @param[out] info
 460  *   Info structure output buffer.
 461  */
 462 static void
 463 mlx5_set_default_params(struct rte_eth_dev *dev, struct rte_eth_dev_info *info)
 464 {
 465         struct priv *priv = dev->data->dev_private;
 466
 467         /* Minimum CPU utilization. */
 468         info->default_rxportconf.ring_size = 256;
 469         info->default_txportconf.ring_size = 256;
 470         info->default_rxportconf.burst_size = 64;
 471         info->default_txportconf.burst_size = 64;
 472         if (priv->link_speed_capa & ETH_LINK_SPEED_100G) {
 473                 info->default_rxportconf.nb_queues = 16;
 474                 info->default_txportconf.nb_queues = 16;
 475                 if (dev->data->nb_rx_queues > 2 ||
 476                     dev->data->nb_tx_queues > 2) {
 477                         /* Max Throughput. */
 478                         info->default_rxportconf.ring_size = 2048;
 479                         info->default_txportconf.ring_size = 2048;
 480                 }
 481         } else {
 482                 info->default_rxportconf.nb_queues = 8;
 483                 info->default_txportconf.nb_queues = 8;
 484                 if (dev->data->nb_rx_queues > 2 ||
 485                     dev->data->nb_tx_queues > 2) {
 486                         /* Max Throughput. */
 487                         info->default_rxportconf.ring_size = 4096;
 488                         info->default_txportconf.ring_size = 4096;
 489                 }
 490         }
 491 }
 492
 493 /**
 494  * DPDK callback to get information about the device.
 495  *
 496  * @param dev
 497  *   Pointer to Ethernet device structure.
 498  * @param[out] info
 499  *   Info structure output buffer.
 500  */
 501 void
 502 mlx5_dev_infos_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *info)
 503 {
 504         struct priv *priv = dev->data->dev_private;
 505         struct mlx5_dev_config *config = &priv->config;
 506         unsigned int max;
 507         char ifname[IF_NAMESIZE];
 508
 509         /* FIXME: we should ask the device for these values. */
 510         info->min_rx_bufsize = 32;
 511         info->max_rx_pktlen = 65536;
 512         /*
 513          * Since we need one CQ per QP, the limit is the minimum number
 514          * between the two values.
 515          */
 516         max = RTE_MIN(priv->device_attr.orig_attr.max_cq,
 517                       priv->device_attr.orig_attr.max_qp);
 518         /* If max >= 65535 then max = 0, max_rx_queues is uint16_t. */
 519         if (max >= 65535)
 520                 max = 65535;
 521         info->max_rx_queues = max;
 522         info->max_tx_queues = max;
 523         info->max_mac_addrs = MLX5_MAX_UC_MAC_ADDRESSES;
 524         info->rx_queue_offload_capa = mlx5_get_rx_queue_offloads(dev);
 525         info->rx_offload_capa = (mlx5_get_rx_port_offloads() |
 526                                  info->rx_queue_offload_capa);
 527         info->tx_offload_capa = mlx5_get_tx_port_offloads(dev);
 528         if (mlx5_get_ifname(dev, &ifname) == 0)
 529                 info->if_index = if_nametoindex(ifname);
 530         info->reta_size = priv->reta_idx_n ?
 531                 priv->reta_idx_n : config->ind_table_max_size;
 532         info->hash_key_size = MLX5_RSS_HASH_KEY_LEN;
 533         info->speed_capa = priv->link_speed_capa;
 534         info->flow_type_rss_offloads = ~MLX5_RSS_HF_MASK;
 535         mlx5_set_default_params(dev, info);
 536         info->switch_info.name = dev->data->name;
 537         info->switch_info.domain_id = priv->domain_id;
 538         info->switch_info.port_id = priv->representor_id;
 539         if (priv->representor) {
 540                 unsigned int i = mlx5_dev_to_port_id(dev->device, NULL, 0);
 541                 uint16_t port_id[i];
 542
 543                 i = RTE_MIN(mlx5_dev_to_port_id(dev->device, port_id, i), i);
 544                 while (i--) {
 545                         struct priv *opriv =
 546                                 rte_eth_devices[port_id[i]].data->dev_private;
 547
 548                         if (!opriv ||
 549                             opriv->representor ||
 550                             opriv->domain_id != priv->domain_id)
 551                                 continue;
 552                         /*
 553                          * Override switch name with that of the master
 554                          * device.
 555                          */
 556                         info->switch_info.name = opriv->dev_data->name;
 557                         break;
 558                 }
 559         }
 560 }
 561
 562 /**
 563  * Get supported packet types.
 564  *
 565  * @param dev
 566  *   Pointer to Ethernet device structure.
 567  *
 568  * @return
 569  *   A pointer to the supported Packet types array.
 570  */
 571 const uint32_t *
 572 mlx5_dev_supported_ptypes_get(struct rte_eth_dev *dev)
 573 {
 574         static const uint32_t ptypes[] = {
 575                 /* refers to rxq_cq_to_pkt_type() */
 576                 RTE_PTYPE_L2_ETHER,
 577                 RTE_PTYPE_L3_IPV4_EXT_UNKNOWN,
 578                 RTE_PTYPE_L3_IPV6_EXT_UNKNOWN,
 579                 RTE_PTYPE_L4_NONFRAG,
 580                 RTE_PTYPE_L4_FRAG,
 581                 RTE_PTYPE_L4_TCP,
 582                 RTE_PTYPE_L4_UDP,
 583                 RTE_PTYPE_INNER_L3_IPV4_EXT_UNKNOWN,
 584                 RTE_PTYPE_INNER_L3_IPV6_EXT_UNKNOWN,
 585                 RTE_PTYPE_INNER_L4_NONFRAG,
 586                 RTE_PTYPE_INNER_L4_FRAG,
 587                 RTE_PTYPE_INNER_L4_TCP,
 588                 RTE_PTYPE_INNER_L4_UDP,
 589                 RTE_PTYPE_UNKNOWN
 590         };
 591
 592         if (dev->rx_pkt_burst == mlx5_rx_burst ||
 593             dev->rx_pkt_burst == mlx5_rx_burst_mprq ||
 594             dev->rx_pkt_burst == mlx5_rx_burst_vec)
 595                 return ptypes;
 596         return NULL;
 597 }
 598
 599 /**
 600  * DPDK callback to retrieve physical link information.
 601  *
 602  * @param dev
 603  *   Pointer to Ethernet device structure.
 604  * @param[out] link
 605  *   Storage for current link status.
 606  *
 607  * @return
 608  *   0 on success, a negative errno value otherwise and rte_errno is set.
 609  */
 610 static int
 611 mlx5_link_update_unlocked_gset(struct rte_eth_dev *dev,
 612                                struct rte_eth_link *link)
 613 {
 614         struct priv *priv = dev->data->dev_private;
 615         struct ethtool_cmd edata = {
 616                 .cmd = ETHTOOL_GSET /* Deprecated since Linux v4.5. */
 617         };
 618         struct ifreq ifr;
 619         struct rte_eth_link dev_link;
 620         int link_speed = 0;
 621         int ret;
 622
 623         ret = mlx5_ifreq(dev, SIOCGIFFLAGS, &ifr);
 624         if (ret) {
 625                 DRV_LOG(WARNING, "port %u ioctl(SIOCGIFFLAGS) failed: %s",
 626                         dev->data->port_id, strerror(rte_errno));
 627                 return ret;
 628         }
 629         dev_link = (struct rte_eth_link) {
 630                 .link_status = ((ifr.ifr_flags & IFF_UP) &&
 631                                 (ifr.ifr_flags & IFF_RUNNING)),
 632         };
 633         ifr = (struct ifreq) {
 634                 .ifr_data = (void *)&edata,
 635         };
 636         ret = mlx5_ifreq(dev, SIOCETHTOOL, &ifr);
 637         if (ret) {
 638                 DRV_LOG(WARNING,
 639                         "port %u ioctl(SIOCETHTOOL, ETHTOOL_GSET) failed: %s",
 640                         dev->data->port_id, strerror(rte_errno));
 641                 return ret;
 642         }
 643         link_speed = ethtool_cmd_speed(&edata);
 644         if (link_speed == -1)
 645                 dev_link.link_speed = ETH_SPEED_NUM_NONE;
 646         else
 647                 dev_link.link_speed = link_speed;
 648         priv->link_speed_capa = 0;
 649         if (edata.supported & SUPPORTED_Autoneg)
 650                 priv->link_speed_capa |= ETH_LINK_SPEED_AUTONEG;
 651         if (edata.supported & (SUPPORTED_1000baseT_Full |
 652                                SUPPORTED_1000baseKX_Full))
 653                 priv->link_speed_capa |= ETH_LINK_SPEED_1G;
 654         if (edata.supported & SUPPORTED_10000baseKR_Full)
 655                 priv->link_speed_capa |= ETH_LINK_SPEED_10G;
 656         if (edata.supported & (SUPPORTED_40000baseKR4_Full |
 657                                SUPPORTED_40000baseCR4_Full |
 658                                SUPPORTED_40000baseSR4_Full |
 659                                SUPPORTED_40000baseLR4_Full))
 660                 priv->link_speed_capa |= ETH_LINK_SPEED_40G;
 661         dev_link.link_duplex = ((edata.duplex == DUPLEX_HALF) ?
 662                                 ETH_LINK_HALF_DUPLEX : ETH_LINK_FULL_DUPLEX);
 663         dev_link.link_autoneg = !(dev->data->dev_conf.link_speeds &
 664                         ETH_LINK_SPEED_FIXED);
 665         if (((dev_link.link_speed && !dev_link.link_status) ||
 666              (!dev_link.link_speed && dev_link.link_status))) {
 667                 rte_errno = EAGAIN;
 668                 return -rte_errno;
 669         }
 670         *link = dev_link;
 671         return 0;
 672 }
 673
 674 /**
 675  * Retrieve physical link information (unlocked version using new ioctl).
 676  *
 677  * @param dev
 678  *   Pointer to Ethernet device structure.
 679  * @param[out] link
 680  *   Storage for current link status.
 681  *
 682  * @return
 683  *   0 on success, a negative errno value otherwise and rte_errno is set.
 684  */
 685 static int
 686 mlx5_link_update_unlocked_gs(struct rte_eth_dev *dev,
 687                              struct rte_eth_link *link)
 688
 689 {
 690         struct priv *priv = dev->data->dev_private;
 691         struct ethtool_link_settings gcmd = { .cmd = ETHTOOL_GLINKSETTINGS };
 692         struct ifreq ifr;
 693         struct rte_eth_link dev_link;
 694         uint64_t sc;
 695         int ret;
 696
 697         ret = mlx5_ifreq(dev, SIOCGIFFLAGS, &ifr);
 698         if (ret) {
 699                 DRV_LOG(WARNING, "port %u ioctl(SIOCGIFFLAGS) failed: %s",
 700                         dev->data->port_id, strerror(rte_errno));
 701                 return ret;
 702         }
 703         dev_link = (struct rte_eth_link) {
 704                 .link_status = ((ifr.ifr_flags & IFF_UP) &&
 705                                 (ifr.ifr_flags & IFF_RUNNING)),
 706         };
 707         ifr = (struct ifreq) {
 708                 .ifr_data = (void *)&gcmd,
 709         };
 710         ret = mlx5_ifreq(dev, SIOCETHTOOL, &ifr);
 711         if (ret) {
 712                 DRV_LOG(DEBUG,
 713                         "port %u ioctl(SIOCETHTOOL, ETHTOOL_GLINKSETTINGS)"
 714                         " failed: %s",
 715                         dev->data->port_id, strerror(rte_errno));
 716                 return ret;
 717         }
 718         gcmd.link_mode_masks_nwords = -gcmd.link_mode_masks_nwords;
 719
 720         alignas(struct ethtool_link_settings)
 721         uint8_t data[offsetof(struct ethtool_link_settings, link_mode_masks) +
 722                      sizeof(uint32_t) * gcmd.link_mode_masks_nwords * 3];
 723         struct ethtool_link_settings *ecmd = (void *)data;
 724
 725         *ecmd = gcmd;
 726         ifr.ifr_data = (void *)ecmd;
 727         ret = mlx5_ifreq(dev, SIOCETHTOOL, &ifr);
 728         if (ret) {
 729                 DRV_LOG(DEBUG,
 730                         "port %u ioctl(SIOCETHTOOL, ETHTOOL_GLINKSETTINGS)"
 731                         " failed: %s",
 732                         dev->data->port_id, strerror(rte_errno));
 733                 return ret;
 734         }
 735         dev_link.link_speed = ecmd->speed;
 736         sc = ecmd->link_mode_masks[0] |
 737                 ((uint64_t)ecmd->link_mode_masks[1] << 32);
 738         priv->link_speed_capa = 0;
 739         if (sc & MLX5_BITSHIFT(ETHTOOL_LINK_MODE_Autoneg_BIT))
 740                 priv->link_speed_capa |= ETH_LINK_SPEED_AUTONEG;
 741         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_1000baseT_Full_BIT) |
 742                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_1000baseKX_Full_BIT)))
 743                 priv->link_speed_capa |= ETH_LINK_SPEED_1G;
 744         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT) |
 745                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT) |
 746                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_10000baseR_FEC_BIT)))
 747                 priv->link_speed_capa |= ETH_LINK_SPEED_10G;
 748         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_20000baseMLD2_Full_BIT) |
 749                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_20000baseKR2_Full_BIT)))
 750                 priv->link_speed_capa |= ETH_LINK_SPEED_20G;
 751         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT) |
 752                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT) |
 753                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT) |
 754                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT)))
 755                 priv->link_speed_capa |= ETH_LINK_SPEED_40G;
 756         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_56000baseKR4_Full_BIT) |
 757                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_56000baseCR4_Full_BIT) |
 758                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_56000baseSR4_Full_BIT) |
 759                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_56000baseLR4_Full_BIT)))
 760                 priv->link_speed_capa |= ETH_LINK_SPEED_56G;
 761         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_25000baseCR_Full_BIT) |
 762                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_25000baseKR_Full_BIT) |
 763                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_25000baseSR_Full_BIT)))
 764                 priv->link_speed_capa |= ETH_LINK_SPEED_25G;
 765         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT) |
 766                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT)))
 767                 priv->link_speed_capa |= ETH_LINK_SPEED_50G;
 768         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT) |
 769                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT) |
 770                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT) |
 771                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT)))
 772                 priv->link_speed_capa |= ETH_LINK_SPEED_100G;
 773         dev_link.link_duplex = ((ecmd->duplex == DUPLEX_HALF) ?
 774                                 ETH_LINK_HALF_DUPLEX : ETH_LINK_FULL_DUPLEX);
 775         dev_link.link_autoneg = !(dev->data->dev_conf.link_speeds &
 776                                   ETH_LINK_SPEED_FIXED);
 777         if (((dev_link.link_speed && !dev_link.link_status) ||
 778              (!dev_link.link_speed && dev_link.link_status))) {
 779                 rte_errno = EAGAIN;
 780                 return -rte_errno;
 781         }
 782         *link = dev_link;
 783         return 0;
 784 }
 785
 786 /**
 787  * DPDK callback to retrieve physical link information.
 788  *
 789  * @param dev
 790  *   Pointer to Ethernet device structure.
 791  * @param wait_to_complete
 792  *   Wait for request completion.
 793  *
 794  * @return
 795  *   0 if link status was not updated, positive if it was, a negative errno
 796  *   value otherwise and rte_errno is set.
 797  */
 798 int
 799 mlx5_link_update(struct rte_eth_dev *dev, int wait_to_complete)
 800 {
 801         int ret;
 802         struct rte_eth_link dev_link;
 803         time_t start_time = time(NULL);
 804
 805         do {
 806                 ret = mlx5_link_update_unlocked_gs(dev, &dev_link);
 807                 if (ret)
 808                         ret = mlx5_link_update_unlocked_gset(dev, &dev_link);
 809                 if (ret == 0)
 810                         break;
 811                 /* Handle wait to complete situation. */
 812                 if (wait_to_complete && ret == -EAGAIN) {
 813                         if (abs((int)difftime(time(NULL), start_time)) <
 814                             MLX5_LINK_STATUS_TIMEOUT) {
 815                                 usleep(0);
 816                                 continue;
 817                         } else {
 818                                 rte_errno = EBUSY;
 819                                 return -rte_errno;
 820                         }
 821                 } else if (ret < 0) {
 822                         return ret;
 823                 }
 824         } while (wait_to_complete);
 825         ret = !!memcmp(&dev->data->dev_link, &dev_link,
 826                        sizeof(struct rte_eth_link));
 827         dev->data->dev_link = dev_link;
 828         return ret;
 829 }
 830
 831 /**
 832  * DPDK callback to change the MTU.
 833  *
 834  * @param dev
 835  *   Pointer to Ethernet device structure.
 836  * @param in_mtu
 837  *   New MTU.
 838  *
 839  * @return
 840  *   0 on success, a negative errno value otherwise and rte_errno is set.
 841  */
 842 int
 843 mlx5_dev_set_mtu(struct rte_eth_dev *dev, uint16_t mtu)
 844 {
 845         struct priv *priv = dev->data->dev_private;
 846         uint16_t kern_mtu = 0;
 847         int ret;
 848
 849         ret = mlx5_get_mtu(dev, &kern_mtu);
 850         if (ret)
 851                 return ret;
 852         /* Set kernel interface MTU first. */
 853         ret = mlx5_set_mtu(dev, mtu);
 854         if (ret)
 855                 return ret;
 856         ret = mlx5_get_mtu(dev, &kern_mtu);
 857         if (ret)
 858                 return ret;
 859         if (kern_mtu == mtu) {
 860                 priv->mtu = mtu;
 861                 DRV_LOG(DEBUG, "port %u adapter MTU set to %u",
 862                         dev->data->port_id, mtu);
 863                 return 0;
 864         }
 865         rte_errno = EAGAIN;
 866         return -rte_errno;
 867 }
 868
 869 /**
 870  * DPDK callback to get flow control status.
 871  *
 872  * @param dev
 873  *   Pointer to Ethernet device structure.
 874  * @param[out] fc_conf
 875  *   Flow control output buffer.
 876  *
 877  * @return
 878  *   0 on success, a negative errno value otherwise and rte_errno is set.
 879  */
 880 int
 881 mlx5_dev_get_flow_ctrl(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
 882 {
 883         struct ifreq ifr;
 884         struct ethtool_pauseparam ethpause = {
 885                 .cmd = ETHTOOL_GPAUSEPARAM
 886         };
 887         int ret;
 888
 889         ifr.ifr_data = (void *)&ethpause;
 890         ret = mlx5_ifreq(dev, SIOCETHTOOL, &ifr);
 891         if (ret) {
 892                 DRV_LOG(WARNING,
 893                         "port %u ioctl(SIOCETHTOOL, ETHTOOL_GPAUSEPARAM) failed:"
 894                         " %s",
 895                         dev->data->port_id, strerror(rte_errno));
 896                 return ret;
 897         }
 898         fc_conf->autoneg = ethpause.autoneg;
 899         if (ethpause.rx_pause && ethpause.tx_pause)
 900                 fc_conf->mode = RTE_FC_FULL;
 901         else if (ethpause.rx_pause)
 902                 fc_conf->mode = RTE_FC_RX_PAUSE;
 903         else if (ethpause.tx_pause)
 904                 fc_conf->mode = RTE_FC_TX_PAUSE;
 905         else
 906                 fc_conf->mode = RTE_FC_NONE;
 907         return 0;
 908 }
 909
 910 /**
 911  * DPDK callback to modify flow control parameters.
 912  *
 913  * @param dev
 914  *   Pointer to Ethernet device structure.
 915  * @param[in] fc_conf
 916  *   Flow control parameters.
 917  *
 918  * @return
 919  *   0 on success, a negative errno value otherwise and rte_errno is set.
 920  */
 921 int
 922 mlx5_dev_set_flow_ctrl(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
 923 {
 924         struct ifreq ifr;
 925         struct ethtool_pauseparam ethpause = {
 926                 .cmd = ETHTOOL_SPAUSEPARAM
 927         };
 928         int ret;
 929
 930         ifr.ifr_data = (void *)&ethpause;
 931         ethpause.autoneg = fc_conf->autoneg;
 932         if (((fc_conf->mode & RTE_FC_FULL) == RTE_FC_FULL) ||
 933             (fc_conf->mode & RTE_FC_RX_PAUSE))
 934                 ethpause.rx_pause = 1;
 935         else
 936                 ethpause.rx_pause = 0;
 937
 938         if (((fc_conf->mode & RTE_FC_FULL) == RTE_FC_FULL) ||
 939             (fc_conf->mode & RTE_FC_TX_PAUSE))
 940                 ethpause.tx_pause = 1;
 941         else
 942                 ethpause.tx_pause = 0;
 943         ret = mlx5_ifreq(dev, SIOCETHTOOL, &ifr);
 944         if (ret) {
 945                 DRV_LOG(WARNING,
 946                         "port %u ioctl(SIOCETHTOOL, ETHTOOL_SPAUSEPARAM)"
 947                         " failed: %s",
 948                         dev->data->port_id, strerror(rte_errno));
 949                 return ret;
 950         }
 951         return 0;
 952 }
 953
 954 /**
 955  * Get PCI information from struct ibv_device.
 956  *
 957  * @param device
 958  *   Pointer to Ethernet device structure.
 959  * @param[out] pci_addr
 960  *   PCI bus address output buffer.
 961  *
 962  * @return
 963  *   0 on success, a negative errno value otherwise and rte_errno is set.
 964  */
 965 int
 966 mlx5_ibv_device_to_pci_addr(const struct ibv_device *device,
 967                             struct rte_pci_addr *pci_addr)
 968 {
 969         FILE *file;
 970         char line[32];
 971         MKSTR(path, "%s/device/uevent", device->ibdev_path);
 972
 973         file = fopen(path, "rb");
 974         if (file == NULL) {
 975                 rte_errno = errno;
 976                 return -rte_errno;
 977         }
 978         while (fgets(line, sizeof(line), file) == line) {
 979                 size_t len = strlen(line);
 980                 int ret;
 981
 982                 /* Truncate long lines. */
 983                 if (len == (sizeof(line) - 1))
 984                         while (line[(len - 1)] != '\n') {
 985                                 ret = fgetc(file);
 986                                 if (ret == EOF)
 987                                         break;
 988                                 line[(len - 1)] = ret;
 989                         }
 990                 /* Extract information. */
 991                 if (sscanf(line,
 992                            "PCI_SLOT_NAME="
 993                            "%" SCNx32 ":%" SCNx8 ":%" SCNx8 ".%" SCNx8 "\n",
 994                            &pci_addr->domain,
 995                            &pci_addr->bus,
 996                            &pci_addr->devid,
 997                            &pci_addr->function) == 4) {
 998                         ret = 0;
 999                         break;
1000                 }
1001         }
1002         fclose(file);
1003         return 0;
1004 }
1005
1006 /**
1007  * Device status handler.
1008  *
1009  * @param dev
1010  *   Pointer to Ethernet device.
1011  * @param events
1012  *   Pointer to event flags holder.
1013  *
1014  * @return
1015  *   Events bitmap of callback process which can be called immediately.
1016  */
1017 static uint32_t
1018 mlx5_dev_status_handler(struct rte_eth_dev *dev)
1019 {
1020         struct priv *priv = dev->data->dev_private;
1021         struct ibv_async_event event;
1022         uint32_t ret = 0;
1023
1024         if (mlx5_link_update(dev, 0) == -EAGAIN) {
1025                 usleep(0);
1026                 return 0;
1027         }
1028         /* Read all message and acknowledge them. */
1029         for (;;) {
1030                 if (mlx5_glue->get_async_event(priv->ctx, &event))
1031                         break;
1032                 if ((event.event_type == IBV_EVENT_PORT_ACTIVE ||
1033                         event.event_type == IBV_EVENT_PORT_ERR) &&
1034                         (dev->data->dev_conf.intr_conf.lsc == 1))
1035                         ret |= (1 << RTE_ETH_EVENT_INTR_LSC);
1036                 else if (event.event_type == IBV_EVENT_DEVICE_FATAL &&
1037                         dev->data->dev_conf.intr_conf.rmv == 1)
1038                         ret |= (1 << RTE_ETH_EVENT_INTR_RMV);
1039                 else
1040                         DRV_LOG(DEBUG,
1041                                 "port %u event type %d on not handled",
1042                                 dev->data->port_id, event.event_type);
1043                 mlx5_glue->ack_async_event(&event);
1044         }
1045         return ret;
1046 }
1047
1048 /**
1049  * Handle interrupts from the NIC.
1050  *
1051  * @param[in] intr_handle
1052  *   Interrupt handler.
1053  * @param cb_arg
1054  *   Callback argument.
1055  */
1056 void
1057 mlx5_dev_interrupt_handler(void *cb_arg)
1058 {
1059         struct rte_eth_dev *dev = cb_arg;
1060         uint32_t events;
1061
1062         events = mlx5_dev_status_handler(dev);
1063         if (events & (1 << RTE_ETH_EVENT_INTR_LSC))
1064                 _rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL);
1065         if (events & (1 << RTE_ETH_EVENT_INTR_RMV))
1066                 _rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_RMV, NULL);
1067 }
1068
1069 /**
1070  * Handle interrupts from the socket.
1071  *
1072  * @param cb_arg
1073  *   Callback argument.
1074  */
1075 static void
1076 mlx5_dev_handler_socket(void *cb_arg)
1077 {
1078         struct rte_eth_dev *dev = cb_arg;
1079
1080         mlx5_socket_handle(dev);
1081 }
1082
1083 /**
1084  * Uninstall interrupt handler.
1085  *
1086  * @param dev
1087  *   Pointer to Ethernet device.
1088  */
1089 void
1090 mlx5_dev_interrupt_handler_uninstall(struct rte_eth_dev *dev)
1091 {
1092         struct priv *priv = dev->data->dev_private;
1093
1094         if (dev->data->dev_conf.intr_conf.lsc ||
1095             dev->data->dev_conf.intr_conf.rmv)
1096                 rte_intr_callback_unregister(&priv->intr_handle,
1097                                              mlx5_dev_interrupt_handler, dev);
1098         if (priv->primary_socket)
1099                 rte_intr_callback_unregister(&priv->intr_handle_socket,
1100                                              mlx5_dev_handler_socket, dev);
1101         priv->intr_handle.fd = 0;
1102         priv->intr_handle.type = RTE_INTR_HANDLE_UNKNOWN;
1103         priv->intr_handle_socket.fd = 0;
1104         priv->intr_handle_socket.type = RTE_INTR_HANDLE_UNKNOWN;
1105 }
1106
1107 /**
1108  * Install interrupt handler.
1109  *
1110  * @param dev
1111  *   Pointer to Ethernet device.
1112  */
1113 void
1114 mlx5_dev_interrupt_handler_install(struct rte_eth_dev *dev)
1115 {
1116         struct priv *priv = dev->data->dev_private;
1117         int ret;
1118         int flags;
1119
1120         assert(priv->ctx->async_fd > 0);
1121         flags = fcntl(priv->ctx->async_fd, F_GETFL);
1122         ret = fcntl(priv->ctx->async_fd, F_SETFL, flags | O_NONBLOCK);
1123         if (ret) {
1124                 DRV_LOG(INFO,
1125                         "port %u failed to change file descriptor async event"
1126                         " queue",
1127                         dev->data->port_id);
1128                 dev->data->dev_conf.intr_conf.lsc = 0;
1129                 dev->data->dev_conf.intr_conf.rmv = 0;
1130         }
1131         if (dev->data->dev_conf.intr_conf.lsc ||
1132             dev->data->dev_conf.intr_conf.rmv) {
1133                 priv->intr_handle.fd = priv->ctx->async_fd;
1134                 priv->intr_handle.type = RTE_INTR_HANDLE_EXT;
1135                 rte_intr_callback_register(&priv->intr_handle,
1136                                            mlx5_dev_interrupt_handler, dev);
1137         }
1138         ret = mlx5_socket_init(dev);
1139         if (ret)
1140                 DRV_LOG(ERR, "port %u cannot initialise socket: %s",
1141                         dev->data->port_id, strerror(rte_errno));
1142         else if (priv->primary_socket) {
1143                 priv->intr_handle_socket.fd = priv->primary_socket;
1144                 priv->intr_handle_socket.type = RTE_INTR_HANDLE_EXT;
1145                 rte_intr_callback_register(&priv->intr_handle_socket,
1146                                            mlx5_dev_handler_socket, dev);
1147         }
1148 }
1149
1150 /**
1151  * DPDK callback to bring the link DOWN.
1152  *
1153  * @param dev
1154  *   Pointer to Ethernet device structure.
1155  *
1156  * @return
1157  *   0 on success, a negative errno value otherwise and rte_errno is set.
1158  */
1159 int
1160 mlx5_set_link_down(struct rte_eth_dev *dev)
1161 {
1162         return mlx5_set_flags(dev, ~IFF_UP, ~IFF_UP);
1163 }
1164
1165 /**
1166  * DPDK callback to bring the link UP.
1167  *
1168  * @param dev
1169  *   Pointer to Ethernet device structure.
1170  *
1171  * @return
1172  *   0 on success, a negative errno value otherwise and rte_errno is set.
1173  */
1174 int
1175 mlx5_set_link_up(struct rte_eth_dev *dev)
1176 {
1177         return mlx5_set_flags(dev, ~IFF_UP, IFF_UP);
1178 }
1179
1180 /**
1181  * Configure the TX function to use.
1182  *
1183  * @param dev
1184  *   Pointer to private data structure.
1185  *
1186  * @return
1187  *   Pointer to selected Tx burst function.
1188  */
1189 eth_tx_burst_t
1190 mlx5_select_tx_function(struct rte_eth_dev *dev)
1191 {
1192         struct priv *priv = dev->data->dev_private;
1193         eth_tx_burst_t tx_pkt_burst = mlx5_tx_burst;
1194         struct mlx5_dev_config *config = &priv->config;
1195         uint64_t tx_offloads = dev->data->dev_conf.txmode.offloads;
1196         int tso = !!(tx_offloads & (DEV_TX_OFFLOAD_TCP_TSO |
1197                                     DEV_TX_OFFLOAD_VXLAN_TNL_TSO |
1198                                     DEV_TX_OFFLOAD_GRE_TNL_TSO |
1199                                     DEV_TX_OFFLOAD_IP_TNL_TSO |
1200                                     DEV_TX_OFFLOAD_UDP_TNL_TSO));
1201         int swp = !!(tx_offloads & (DEV_TX_OFFLOAD_IP_TNL_TSO |
1202                                     DEV_TX_OFFLOAD_UDP_TNL_TSO |
1203                                     DEV_TX_OFFLOAD_OUTER_IPV4_CKSUM));
1204         int vlan_insert = !!(tx_offloads & DEV_TX_OFFLOAD_VLAN_INSERT);
1205
1206         assert(priv != NULL);
1207         /* Select appropriate TX function. */
1208         if (vlan_insert || tso || swp)
1209                 return tx_pkt_burst;
1210         if (config->mps == MLX5_MPW_ENHANCED) {
1211                 if (mlx5_check_vec_tx_support(dev) > 0) {
1212                         if (mlx5_check_raw_vec_tx_support(dev) > 0)
1213                                 tx_pkt_burst = mlx5_tx_burst_raw_vec;
1214                         else
1215                                 tx_pkt_burst = mlx5_tx_burst_vec;
1216                         DRV_LOG(DEBUG,
1217                                 "port %u selected enhanced MPW Tx vectorized"
1218                                 " function",
1219                                 dev->data->port_id);
1220                 } else {
1221                         tx_pkt_burst = mlx5_tx_burst_empw;
1222                         DRV_LOG(DEBUG,
1223                                 "port %u selected enhanced MPW Tx function",
1224                                 dev->data->port_id);
1225                 }
1226         } else if (config->mps && (config->txq_inline > 0)) {
1227                 tx_pkt_burst = mlx5_tx_burst_mpw_inline;
1228                 DRV_LOG(DEBUG, "port %u selected MPW inline Tx function",
1229                         dev->data->port_id);
1230         } else if (config->mps) {
1231                 tx_pkt_burst = mlx5_tx_burst_mpw;
1232                 DRV_LOG(DEBUG, "port %u selected MPW Tx function",
1233                         dev->data->port_id);
1234         }
1235         return tx_pkt_burst;
1236 }
1237
1238 /**
1239  * Configure the RX function to use.
1240  *
1241  * @param dev
1242  *   Pointer to private data structure.
1243  *
1244  * @return
1245  *   Pointer to selected Rx burst function.
1246  */
1247 eth_rx_burst_t
1248 mlx5_select_rx_function(struct rte_eth_dev *dev)
1249 {
1250         eth_rx_burst_t rx_pkt_burst = mlx5_rx_burst;
1251
1252         assert(dev != NULL);
1253         if (mlx5_check_vec_rx_support(dev) > 0) {
1254                 rx_pkt_burst = mlx5_rx_burst_vec;
1255                 DRV_LOG(DEBUG, "port %u selected Rx vectorized function",
1256                         dev->data->port_id);
1257         } else if (mlx5_mprq_enabled(dev)) {
1258                 rx_pkt_burst = mlx5_rx_burst_mprq;
1259         }
1260         return rx_pkt_burst;
1261 }
1262
1263 /**
1264  * Check if mlx5 device was removed.
1265  *
1266  * @param dev
1267  *   Pointer to Ethernet device structure.
1268  *
1269  * @return
1270  *   1 when device is removed, otherwise 0.
1271  */
1272 int
1273 mlx5_is_removed(struct rte_eth_dev *dev)
1274 {
1275         struct ibv_device_attr device_attr;
1276         struct priv *priv = dev->data->dev_private;
1277
1278         if (mlx5_glue->query_device(priv->ctx, &device_attr) == EIO)
1279                 return 1;
1280         return 0;
1281 }
1282
1283 /**
1284  * Get port ID list of mlx5 instances sharing a common device.
1285  *
1286  * @param[in] dev
1287  *   Device to look for.
1288  * @param[out] port_list
1289  *   Result buffer for collected port IDs.
1290  * @param port_list_n
1291  *   Maximum number of entries in result buffer. If 0, @p port_list can be
1292  *   NULL.
1293  *
1294  * @return
1295  *   Number of matching instances regardless of the @p port_list_n
1296  *   parameter, 0 if none were found.
1297  */
1298 unsigned int
1299 mlx5_dev_to_port_id(const struct rte_device *dev, uint16_t *port_list,
1300                     unsigned int port_list_n)
1301 {
1302         uint16_t id;
1303         unsigned int n = 0;
1304
1305         RTE_ETH_FOREACH_DEV(id) {
1306                 struct rte_eth_dev *ldev = &rte_eth_devices[id];
1307
1308                 if (ldev->device != dev)
1309                         continue;
1310                 if (n < port_list_n)
1311                         port_list[n] = id;
1312                 n++;
1313         }
1314         return n;
1315 }
1316
1317 /**
1318  * Get switch information associated with network interface.
1319  *
1320  * @param ifindex
1321  *   Network interface index.
1322  * @param[out] info
1323  *   Switch information object, populated in case of success.
1324  *
1325  * @return
1326  *   0 on success, a negative errno value otherwise and rte_errno is set.
1327  */
1328 int
1329 mlx5_sysfs_switch_info(unsigned int ifindex, struct mlx5_switch_info *info)
1330 {
1331         char ifname[IF_NAMESIZE];
1332         FILE *file;
1333         struct mlx5_switch_info data = { .master = 0, };
1334         bool port_name_set = false;
1335         bool port_switch_id_set = false;
1336         char c;
1337
1338         if (!if_indextoname(ifindex, ifname)) {
1339                 rte_errno = errno;
1340                 return -rte_errno;
1341         }
1342
1343         MKSTR(phys_port_name, "/sys/class/net/%s/phys_port_name",
1344               ifname);
1345         MKSTR(phys_switch_id, "/sys/class/net/%s/phys_switch_id",
1346               ifname);
1347
1348         file = fopen(phys_port_name, "rb");
1349         if (file != NULL) {
1350                 port_name_set =
1351                         fscanf(file, "%d%c", &data.port_name, &c) == 2 &&
1352                         c == '\n';
1353                 fclose(file);
1354         }
1355         file = fopen(phys_switch_id, "rb");
1356         if (file == NULL) {
1357                 rte_errno = errno;
1358                 return -rte_errno;
1359         }
1360         port_switch_id_set =
1361                 fscanf(file, "%" SCNx64 "%c", &data.switch_id, &c) == 2 &&
1362                 c == '\n';
1363         fclose(file);
1364         data.master = port_switch_id_set && !port_name_set;
1365         data.representor = port_switch_id_set && port_name_set;
1366         *info = data;
1367         return 0;
1368 }