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 <unistd.h>
   8 #include <string.h>
   9 #include <stdint.h>
  10 #include <stdlib.h>
  11 #include <errno.h>
  12
  13 #include <ethdev_driver.h>
  14 #include <rte_bus_pci.h>
  15 #include <rte_mbuf.h>
  16 #include <rte_common.h>
  17 #include <rte_interrupts.h>
  18 #include <rte_malloc.h>
  19 #include <rte_string_fns.h>
  20 #include <rte_rwlock.h>
  21 #include <rte_cycles.h>
  22
  23 #include <mlx5_malloc.h>
  24
  25 #include "mlx5_rxtx.h"
  26 #include "mlx5_rx.h"
  27 #include "mlx5_tx.h"
  28 #include "mlx5_autoconf.h"
  29
  30 /**
  31  * Get the interface index from device name.
  32  *
  33  * @param[in] dev
  34  *   Pointer to Ethernet device.
  35  *
  36  * @return
  37  *   Nonzero interface index on success, zero otherwise and rte_errno is set.
  38  */
  39 unsigned int
  40 mlx5_ifindex(const struct rte_eth_dev *dev)
  41 {
  42         struct mlx5_priv *priv = dev->data->dev_private;
  43         unsigned int ifindex;
  44
  45         MLX5_ASSERT(priv);
  46         MLX5_ASSERT(priv->if_index);
  47         if (priv->master && priv->sh->bond.ifindex > 0)
  48                 ifindex = priv->sh->bond.ifindex;
  49         else
  50                 ifindex = priv->if_index;
  51         if (!ifindex)
  52                 rte_errno = ENXIO;
  53         return ifindex;
  54 }
  55
  56 /**
  57  * DPDK callback for Ethernet device configuration.
  58  *
  59  * @param dev
  60  *   Pointer to Ethernet device structure.
  61  *
  62  * @return
  63  *   0 on success, a negative errno value otherwise and rte_errno is set.
  64  */
  65 int
  66 mlx5_dev_configure(struct rte_eth_dev *dev)
  67 {
  68         struct mlx5_priv *priv = dev->data->dev_private;
  69         unsigned int rxqs_n = dev->data->nb_rx_queues;
  70         unsigned int txqs_n = dev->data->nb_tx_queues;
  71         const uint8_t use_app_rss_key =
  72                 !!dev->data->dev_conf.rx_adv_conf.rss_conf.rss_key;
  73         int ret = 0;
  74
  75         if (use_app_rss_key &&
  76             (dev->data->dev_conf.rx_adv_conf.rss_conf.rss_key_len !=
  77              MLX5_RSS_HASH_KEY_LEN)) {
  78                 DRV_LOG(ERR, "port %u RSS key len must be %s Bytes long",
  79                         dev->data->port_id, RTE_STR(MLX5_RSS_HASH_KEY_LEN));
  80                 rte_errno = EINVAL;
  81                 return -rte_errno;
  82         }
  83         priv->rss_conf.rss_key =
  84                 mlx5_realloc(priv->rss_conf.rss_key, MLX5_MEM_RTE,
  85                             MLX5_RSS_HASH_KEY_LEN, 0, SOCKET_ID_ANY);
  86         if (!priv->rss_conf.rss_key) {
  87                 DRV_LOG(ERR, "port %u cannot allocate RSS hash key memory (%u)",
  88                         dev->data->port_id, rxqs_n);
  89                 rte_errno = ENOMEM;
  90                 return -rte_errno;
  91         }
  92
  93         if ((dev->data->dev_conf.txmode.offloads &
  94                         DEV_TX_OFFLOAD_SEND_ON_TIMESTAMP) &&
  95                         rte_mbuf_dyn_tx_timestamp_register(NULL, NULL) != 0) {
  96                 DRV_LOG(ERR, "port %u cannot register Tx timestamp field/flag",
  97                         dev->data->port_id);
  98                 return -rte_errno;
  99         }
 100         memcpy(priv->rss_conf.rss_key,
 101                use_app_rss_key ?
 102                dev->data->dev_conf.rx_adv_conf.rss_conf.rss_key :
 103                rss_hash_default_key,
 104                MLX5_RSS_HASH_KEY_LEN);
 105         priv->rss_conf.rss_key_len = MLX5_RSS_HASH_KEY_LEN;
 106         priv->rss_conf.rss_hf = dev->data->dev_conf.rx_adv_conf.rss_conf.rss_hf;
 107         priv->rxqs = (void *)dev->data->rx_queues;
 108         priv->txqs = (void *)dev->data->tx_queues;
 109         if (txqs_n != priv->txqs_n) {
 110                 DRV_LOG(INFO, "port %u Tx queues number update: %u -> %u",
 111                         dev->data->port_id, priv->txqs_n, txqs_n);
 112                 priv->txqs_n = txqs_n;
 113         }
 114         if (rxqs_n > priv->config.ind_table_max_size) {
 115                 DRV_LOG(ERR, "port %u cannot handle this many Rx queues (%u)",
 116                         dev->data->port_id, rxqs_n);
 117                 rte_errno = EINVAL;
 118                 return -rte_errno;
 119         }
 120         if (rxqs_n != priv->rxqs_n) {
 121                 DRV_LOG(INFO, "port %u Rx queues number update: %u -> %u",
 122                         dev->data->port_id, priv->rxqs_n, rxqs_n);
 123                 priv->rxqs_n = rxqs_n;
 124         }
 125         priv->skip_default_rss_reta = 0;
 126         ret = mlx5_proc_priv_init(dev);
 127         if (ret)
 128                 return ret;
 129         return 0;
 130 }
 131
 132 /**
 133  * Configure default RSS reta.
 134  *
 135  * @param dev
 136  *   Pointer to Ethernet device structure.
 137  *
 138  * @return
 139  *   0 on success, a negative errno value otherwise and rte_errno is set.
 140  */
 141 int
 142 mlx5_dev_configure_rss_reta(struct rte_eth_dev *dev)
 143 {
 144         struct mlx5_priv *priv = dev->data->dev_private;
 145         unsigned int rxqs_n = dev->data->nb_rx_queues;
 146         unsigned int i;
 147         unsigned int j;
 148         unsigned int reta_idx_n;
 149         int ret = 0;
 150         unsigned int *rss_queue_arr = NULL;
 151         unsigned int rss_queue_n = 0;
 152
 153         if (priv->skip_default_rss_reta)
 154                 return ret;
 155         rss_queue_arr = mlx5_malloc(0, rxqs_n * sizeof(unsigned int), 0,
 156                                     SOCKET_ID_ANY);
 157         if (!rss_queue_arr) {
 158                 DRV_LOG(ERR, "port %u cannot allocate RSS queue list (%u)",
 159                         dev->data->port_id, rxqs_n);
 160                 rte_errno = ENOMEM;
 161                 return -rte_errno;
 162         }
 163         for (i = 0, j = 0; i < rxqs_n; i++) {
 164                 struct mlx5_rxq_data *rxq_data;
 165                 struct mlx5_rxq_ctrl *rxq_ctrl;
 166
 167                 rxq_data = (*priv->rxqs)[i];
 168                 rxq_ctrl = container_of(rxq_data, struct mlx5_rxq_ctrl, rxq);
 169                 if (rxq_ctrl && rxq_ctrl->type == MLX5_RXQ_TYPE_STANDARD)
 170                         rss_queue_arr[j++] = i;
 171         }
 172         rss_queue_n = j;
 173         if (rss_queue_n > priv->config.ind_table_max_size) {
 174                 DRV_LOG(ERR, "port %u cannot handle this many Rx queues (%u)",
 175                         dev->data->port_id, rss_queue_n);
 176                 rte_errno = EINVAL;
 177                 mlx5_free(rss_queue_arr);
 178                 return -rte_errno;
 179         }
 180         DRV_LOG(INFO, "port %u Rx queues number update: %u -> %u",
 181                 dev->data->port_id, priv->rxqs_n, rxqs_n);
 182         priv->rxqs_n = rxqs_n;
 183         /*
 184          * If the requested number of RX queues is not a power of two,
 185          * use the maximum indirection table size for better balancing.
 186          * The result is always rounded to the next power of two.
 187          */
 188         reta_idx_n = (1 << log2above((rss_queue_n & (rss_queue_n - 1)) ?
 189                                 priv->config.ind_table_max_size :
 190                                 rss_queue_n));
 191         ret = mlx5_rss_reta_index_resize(dev, reta_idx_n);
 192         if (ret) {
 193                 mlx5_free(rss_queue_arr);
 194                 return ret;
 195         }
 196         /*
 197          * When the number of RX queues is not a power of two,
 198          * the remaining table entries are padded with reused WQs
 199          * and hashes are not spread uniformly.
 200          */
 201         for (i = 0, j = 0; (i != reta_idx_n); ++i) {
 202                 (*priv->reta_idx)[i] = rss_queue_arr[j];
 203                 if (++j == rss_queue_n)
 204                         j = 0;
 205         }
 206         mlx5_free(rss_queue_arr);
 207         return ret;
 208 }
 209
 210 /**
 211  * Sets default tuning parameters.
 212  *
 213  * @param dev
 214  *   Pointer to Ethernet device.
 215  * @param[out] info
 216  *   Info structure output buffer.
 217  */
 218 static void
 219 mlx5_set_default_params(struct rte_eth_dev *dev, struct rte_eth_dev_info *info)
 220 {
 221         struct mlx5_priv *priv = dev->data->dev_private;
 222
 223         /* Minimum CPU utilization. */
 224         info->default_rxportconf.ring_size = 256;
 225         info->default_txportconf.ring_size = 256;
 226         info->default_rxportconf.burst_size = MLX5_RX_DEFAULT_BURST;
 227         info->default_txportconf.burst_size = MLX5_TX_DEFAULT_BURST;
 228         if ((priv->link_speed_capa & ETH_LINK_SPEED_200G) |
 229                 (priv->link_speed_capa & ETH_LINK_SPEED_100G)) {
 230                 info->default_rxportconf.nb_queues = 16;
 231                 info->default_txportconf.nb_queues = 16;
 232                 if (dev->data->nb_rx_queues > 2 ||
 233                     dev->data->nb_tx_queues > 2) {
 234                         /* Max Throughput. */
 235                         info->default_rxportconf.ring_size = 2048;
 236                         info->default_txportconf.ring_size = 2048;
 237                 }
 238         } else {
 239                 info->default_rxportconf.nb_queues = 8;
 240                 info->default_txportconf.nb_queues = 8;
 241                 if (dev->data->nb_rx_queues > 2 ||
 242                     dev->data->nb_tx_queues > 2) {
 243                         /* Max Throughput. */
 244                         info->default_rxportconf.ring_size = 4096;
 245                         info->default_txportconf.ring_size = 4096;
 246                 }
 247         }
 248 }
 249
 250 /**
 251  * Sets tx mbuf limiting parameters.
 252  *
 253  * @param dev
 254  *   Pointer to Ethernet device.
 255  * @param[out] info
 256  *   Info structure output buffer.
 257  */
 258 static void
 259 mlx5_set_txlimit_params(struct rte_eth_dev *dev, struct rte_eth_dev_info *info)
 260 {
 261         struct mlx5_priv *priv = dev->data->dev_private;
 262         struct mlx5_dev_config *config = &priv->config;
 263         unsigned int inlen;
 264         uint16_t nb_max;
 265
 266         inlen = (config->txq_inline_max == MLX5_ARG_UNSET) ?
 267                 MLX5_SEND_DEF_INLINE_LEN :
 268                 (unsigned int)config->txq_inline_max;
 269         MLX5_ASSERT(config->txq_inline_min >= 0);
 270         inlen = RTE_MAX(inlen, (unsigned int)config->txq_inline_min);
 271         inlen = RTE_MIN(inlen, MLX5_WQE_SIZE_MAX +
 272                                MLX5_ESEG_MIN_INLINE_SIZE -
 273                                MLX5_WQE_CSEG_SIZE -
 274                                MLX5_WQE_ESEG_SIZE -
 275                                MLX5_WQE_DSEG_SIZE * 2);
 276         nb_max = (MLX5_WQE_SIZE_MAX +
 277                   MLX5_ESEG_MIN_INLINE_SIZE -
 278                   MLX5_WQE_CSEG_SIZE -
 279                   MLX5_WQE_ESEG_SIZE -
 280                   MLX5_WQE_DSEG_SIZE -
 281                   inlen) / MLX5_WSEG_SIZE;
 282         info->tx_desc_lim.nb_seg_max = nb_max;
 283         info->tx_desc_lim.nb_mtu_seg_max = nb_max;
 284 }
 285
 286 /**
 287  * DPDK callback to get information about the device.
 288  *
 289  * @param dev
 290  *   Pointer to Ethernet device structure.
 291  * @param[out] info
 292  *   Info structure output buffer.
 293  */
 294 int
 295 mlx5_dev_infos_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *info)
 296 {
 297         struct mlx5_priv *priv = dev->data->dev_private;
 298         struct mlx5_dev_config *config = &priv->config;
 299         unsigned int max;
 300
 301         /* FIXME: we should ask the device for these values. */
 302         info->min_rx_bufsize = 32;
 303         info->max_rx_pktlen = 65536;
 304         info->max_lro_pkt_size = MLX5_MAX_LRO_SIZE;
 305         /*
 306          * Since we need one CQ per QP, the limit is the minimum number
 307          * between the two values.
 308          */
 309         max = RTE_MIN(priv->sh->device_attr.max_cq,
 310                       priv->sh->device_attr.max_qp);
 311         /* max_rx_queues is uint16_t. */
 312         max = RTE_MIN(max, (unsigned int)UINT16_MAX);
 313         info->max_rx_queues = max;
 314         info->max_tx_queues = max;
 315         info->max_mac_addrs = MLX5_MAX_UC_MAC_ADDRESSES;
 316         info->rx_queue_offload_capa = mlx5_get_rx_queue_offloads(dev);
 317         info->rx_seg_capa.max_nseg = MLX5_MAX_RXQ_NSEG;
 318         info->rx_seg_capa.multi_pools = !config->mprq.enabled;
 319         info->rx_seg_capa.offset_allowed = !config->mprq.enabled;
 320         info->rx_seg_capa.offset_align_log2 = 0;
 321         info->rx_offload_capa = (mlx5_get_rx_port_offloads() |
 322                                  info->rx_queue_offload_capa);
 323         info->tx_offload_capa = mlx5_get_tx_port_offloads(dev);
 324         info->if_index = mlx5_ifindex(dev);
 325         info->reta_size = priv->reta_idx_n ?
 326                 priv->reta_idx_n : config->ind_table_max_size;
 327         info->hash_key_size = MLX5_RSS_HASH_KEY_LEN;
 328         info->speed_capa = priv->link_speed_capa;
 329         info->flow_type_rss_offloads = ~MLX5_RSS_HF_MASK;
 330         mlx5_set_default_params(dev, info);
 331         mlx5_set_txlimit_params(dev, info);
 332         info->switch_info.name = dev->data->name;
 333         info->switch_info.domain_id = priv->domain_id;
 334         info->switch_info.port_id = priv->representor_id;
 335         if (priv->representor) {
 336                 uint16_t port_id;
 337
 338                 MLX5_ETH_FOREACH_DEV(port_id, dev->device) {
 339                         struct mlx5_priv *opriv =
 340                                 rte_eth_devices[port_id].data->dev_private;
 341
 342                         if (!opriv ||
 343                             opriv->representor ||
 344                             opriv->sh != priv->sh ||
 345                             opriv->domain_id != priv->domain_id)
 346                                 continue;
 347                         /*
 348                          * Override switch name with that of the master
 349                          * device.
 350                          */
 351                         info->switch_info.name = opriv->dev_data->name;
 352                         break;
 353                 }
 354         }
 355         return 0;
 356 }
 357
 358 /**
 359  * Calculate representor ID from port switch info.
 360  *
 361  * Uint16 representor ID bits definition:
 362  *   pf: 2
 363  *   type: 2
 364  *   vf/sf: 12
 365  *
 366  * @param info
 367  *   Port switch info.
 368  * @param hpf_type
 369  *   Use this type if port is HPF.
 370  *
 371  * @return
 372  *   Encoded representor ID.
 373  */
 374 uint16_t
 375 mlx5_representor_id_encode(const struct mlx5_switch_info *info,
 376                            enum rte_eth_representor_type hpf_type)
 377 {
 378         enum rte_eth_representor_type type = RTE_ETH_REPRESENTOR_VF;
 379         uint16_t repr = info->port_name;
 380
 381         if (info->representor == 0)
 382                 return UINT16_MAX;
 383         if (info->name_type == MLX5_PHYS_PORT_NAME_TYPE_PFSF)
 384                 type = RTE_ETH_REPRESENTOR_SF;
 385         if (info->name_type == MLX5_PHYS_PORT_NAME_TYPE_PFHPF) {
 386                 type = hpf_type;
 387                 repr = UINT16_MAX;
 388         }
 389         return MLX5_REPRESENTOR_ID(info->pf_num, type, repr);
 390 }
 391
 392 /**
 393  * DPDK callback to get information about representor.
 394  *
 395  * Representor ID bits definition:
 396  *   vf/sf: 12
 397  *   type: 2
 398  *   pf: 2
 399  *
 400  * @param dev
 401  *   Pointer to Ethernet device structure.
 402  * @param[out] info
 403  *   Nullable info structure output buffer.
 404  *
 405  * @return
 406  *   negative on error, or the number of representor ranges.
 407  */
 408 int
 409 mlx5_representor_info_get(struct rte_eth_dev *dev,
 410                           struct rte_eth_representor_info *info)
 411 {
 412         struct mlx5_priv *priv = dev->data->dev_private;
 413         int n_type = 4; /* Representor types, VF, HPF@VF, SF and HPF@SF. */
 414         int n_pf = 2; /* Number of PFs. */
 415         int i = 0, pf;
 416         int n_entries;
 417
 418         if (info == NULL)
 419                 goto out;
 420
 421         n_entries = n_type * n_pf;
 422         if ((uint32_t)n_entries > info->nb_ranges_alloc)
 423                 n_entries = info->nb_ranges_alloc;
 424
 425         info->controller = 0;
 426         info->pf = priv->pf_bond >= 0 ? priv->pf_bond : 0;
 427         for (pf = 0; pf < n_pf; ++pf) {
 428                 /* VF range. */
 429                 info->ranges[i].type = RTE_ETH_REPRESENTOR_VF;
 430                 info->ranges[i].controller = 0;
 431                 info->ranges[i].pf = pf;
 432                 info->ranges[i].vf = 0;
 433                 info->ranges[i].id_base =
 434                         MLX5_REPRESENTOR_ID(pf, info->ranges[i].type, 0);
 435                 info->ranges[i].id_end =
 436                         MLX5_REPRESENTOR_ID(pf, info->ranges[i].type, -1);
 437                 snprintf(info->ranges[i].name,
 438                          sizeof(info->ranges[i].name), "pf%dvf", pf);
 439                 i++;
 440                 if (i == n_entries)
 441                         break;
 442                 /* HPF range of VF type. */
 443                 info->ranges[i].type = RTE_ETH_REPRESENTOR_VF;
 444                 info->ranges[i].controller = 0;
 445                 info->ranges[i].pf = pf;
 446                 info->ranges[i].vf = UINT16_MAX;
 447                 info->ranges[i].id_base =
 448                         MLX5_REPRESENTOR_ID(pf, info->ranges[i].type, -1);
 449                 info->ranges[i].id_end =
 450                         MLX5_REPRESENTOR_ID(pf, info->ranges[i].type, -1);
 451                 snprintf(info->ranges[i].name,
 452                          sizeof(info->ranges[i].name), "pf%dvf", pf);
 453                 i++;
 454                 if (i == n_entries)
 455                         break;
 456                 /* SF range. */
 457                 info->ranges[i].type = RTE_ETH_REPRESENTOR_SF;
 458                 info->ranges[i].controller = 0;
 459                 info->ranges[i].pf = pf;
 460                 info->ranges[i].vf = 0;
 461                 info->ranges[i].id_base =
 462                         MLX5_REPRESENTOR_ID(pf, info->ranges[i].type, 0);
 463                 info->ranges[i].id_end =
 464                         MLX5_REPRESENTOR_ID(pf, info->ranges[i].type, -1);
 465                 snprintf(info->ranges[i].name,
 466                          sizeof(info->ranges[i].name), "pf%dsf", pf);
 467                 i++;
 468                 if (i == n_entries)
 469                         break;
 470                 /* HPF range of SF type. */
 471                 info->ranges[i].type = RTE_ETH_REPRESENTOR_SF;
 472                 info->ranges[i].controller = 0;
 473                 info->ranges[i].pf = pf;
 474                 info->ranges[i].vf = UINT16_MAX;
 475                 info->ranges[i].id_base =
 476                         MLX5_REPRESENTOR_ID(pf, info->ranges[i].type, -1);
 477                 info->ranges[i].id_end =
 478                         MLX5_REPRESENTOR_ID(pf, info->ranges[i].type, -1);
 479                 snprintf(info->ranges[i].name,
 480                          sizeof(info->ranges[i].name), "pf%dsf", pf);
 481                 i++;
 482                 if (i == n_entries)
 483                         break;
 484         }
 485         info->nb_ranges = i;
 486 out:
 487         return n_type * n_pf;
 488 }
 489
 490 /**
 491  * Get firmware version of a device.
 492  *
 493  * @param dev
 494  *   Ethernet device port.
 495  * @param fw_ver
 496  *   String output allocated by caller.
 497  * @param fw_size
 498  *   Size of the output string, including terminating null byte.
 499  *
 500  * @return
 501  *   0 on success, or the size of the non truncated string if too big.
 502  */
 503 int
 504 mlx5_fw_version_get(struct rte_eth_dev *dev, char *fw_ver, size_t fw_size)
 505 {
 506         struct mlx5_priv *priv = dev->data->dev_private;
 507         struct mlx5_dev_attr *attr = &priv->sh->device_attr;
 508         size_t size = strnlen(attr->fw_ver, sizeof(attr->fw_ver)) + 1;
 509
 510         if (fw_size < size)
 511                 return size;
 512         if (fw_ver != NULL)
 513                 strlcpy(fw_ver, attr->fw_ver, fw_size);
 514         return 0;
 515 }
 516
 517 /**
 518  * Get supported packet types.
 519  *
 520  * @param dev
 521  *   Pointer to Ethernet device structure.
 522  *
 523  * @return
 524  *   A pointer to the supported Packet types array.
 525  */
 526 const uint32_t *
 527 mlx5_dev_supported_ptypes_get(struct rte_eth_dev *dev)
 528 {
 529         static const uint32_t ptypes[] = {
 530                 /* refers to rxq_cq_to_pkt_type() */
 531                 RTE_PTYPE_L2_ETHER,
 532                 RTE_PTYPE_L3_IPV4_EXT_UNKNOWN,
 533                 RTE_PTYPE_L3_IPV6_EXT_UNKNOWN,
 534                 RTE_PTYPE_L4_NONFRAG,
 535                 RTE_PTYPE_L4_FRAG,
 536                 RTE_PTYPE_L4_TCP,
 537                 RTE_PTYPE_L4_UDP,
 538                 RTE_PTYPE_INNER_L3_IPV4_EXT_UNKNOWN,
 539                 RTE_PTYPE_INNER_L3_IPV6_EXT_UNKNOWN,
 540                 RTE_PTYPE_INNER_L4_NONFRAG,
 541                 RTE_PTYPE_INNER_L4_FRAG,
 542                 RTE_PTYPE_INNER_L4_TCP,
 543                 RTE_PTYPE_INNER_L4_UDP,
 544                 RTE_PTYPE_UNKNOWN
 545         };
 546
 547         if (dev->rx_pkt_burst == mlx5_rx_burst ||
 548             dev->rx_pkt_burst == mlx5_rx_burst_mprq ||
 549             dev->rx_pkt_burst == mlx5_rx_burst_vec ||
 550             dev->rx_pkt_burst == mlx5_rx_burst_mprq_vec)
 551                 return ptypes;
 552         return NULL;
 553 }
 554
 555 /**
 556  * DPDK callback to change the MTU.
 557  *
 558  * @param dev
 559  *   Pointer to Ethernet device structure.
 560  * @param in_mtu
 561  *   New MTU.
 562  *
 563  * @return
 564  *   0 on success, a negative errno value otherwise and rte_errno is set.
 565  */
 566 int
 567 mlx5_dev_set_mtu(struct rte_eth_dev *dev, uint16_t mtu)
 568 {
 569         struct mlx5_priv *priv = dev->data->dev_private;
 570         uint16_t kern_mtu = 0;
 571         int ret;
 572
 573         ret = mlx5_get_mtu(dev, &kern_mtu);
 574         if (ret)
 575                 return ret;
 576         /* Set kernel interface MTU first. */
 577         ret = mlx5_set_mtu(dev, mtu);
 578         if (ret)
 579                 return ret;
 580         ret = mlx5_get_mtu(dev, &kern_mtu);
 581         if (ret)
 582                 return ret;
 583         if (kern_mtu == mtu) {
 584                 priv->mtu = mtu;
 585                 DRV_LOG(DEBUG, "port %u adapter MTU set to %u",
 586                         dev->data->port_id, mtu);
 587                 return 0;
 588         }
 589         rte_errno = EAGAIN;
 590         return -rte_errno;
 591 }
 592
 593 /**
 594  * Configure the RX function to use.
 595  *
 596  * @param dev
 597  *   Pointer to private data structure.
 598  *
 599  * @return
 600  *   Pointer to selected Rx burst function.
 601  */
 602 eth_rx_burst_t
 603 mlx5_select_rx_function(struct rte_eth_dev *dev)
 604 {
 605         eth_rx_burst_t rx_pkt_burst = mlx5_rx_burst;
 606
 607         MLX5_ASSERT(dev != NULL);
 608         if (mlx5_check_vec_rx_support(dev) > 0) {
 609                 if (mlx5_mprq_enabled(dev)) {
 610                         rx_pkt_burst = mlx5_rx_burst_mprq_vec;
 611                         DRV_LOG(DEBUG, "port %u selected vectorized"
 612                                 " MPRQ Rx function", dev->data->port_id);
 613                 } else {
 614                         rx_pkt_burst = mlx5_rx_burst_vec;
 615                         DRV_LOG(DEBUG, "port %u selected vectorized"
 616                                 " SPRQ Rx function", dev->data->port_id);
 617                 }
 618         } else if (mlx5_mprq_enabled(dev)) {
 619                 rx_pkt_burst = mlx5_rx_burst_mprq;
 620                 DRV_LOG(DEBUG, "port %u selected MPRQ Rx function",
 621                         dev->data->port_id);
 622         } else {
 623                 DRV_LOG(DEBUG, "port %u selected SPRQ Rx function",
 624                         dev->data->port_id);
 625         }
 626         return rx_pkt_burst;
 627 }
 628
 629 /**
 630  * Get the E-Switch parameters by port id.
 631  *
 632  * @param[in] port
 633  *   Device port id.
 634  * @param[in] valid
 635  *   Device port id is valid, skip check. This flag is useful
 636  *   when trials are performed from probing and device is not
 637  *   flagged as valid yet (in attaching process).
 638  * @param[out] es_domain_id
 639  *   E-Switch domain id.
 640  * @param[out] es_port_id
 641  *   The port id of the port in the E-Switch.
 642  *
 643  * @return
 644  *   pointer to device private data structure containing data needed
 645  *   on success, NULL otherwise and rte_errno is set.
 646  */
 647 struct mlx5_priv *
 648 mlx5_port_to_eswitch_info(uint16_t port, bool valid)
 649 {
 650         struct rte_eth_dev *dev;
 651         struct mlx5_priv *priv;
 652
 653         if (port >= RTE_MAX_ETHPORTS) {
 654                 rte_errno = EINVAL;
 655                 return NULL;
 656         }
 657         if (!valid && !rte_eth_dev_is_valid_port(port)) {
 658                 rte_errno = ENODEV;
 659                 return NULL;
 660         }
 661         dev = &rte_eth_devices[port];
 662         priv = dev->data->dev_private;
 663         if (!(priv->representor || priv->master)) {
 664                 rte_errno = EINVAL;
 665                 return NULL;
 666         }
 667         return priv;
 668 }
 669
 670 /**
 671  * Get the E-Switch parameters by device instance.
 672  *
 673  * @param[in] port
 674  *   Device port id.
 675  * @param[out] es_domain_id
 676  *   E-Switch domain id.
 677  * @param[out] es_port_id
 678  *   The port id of the port in the E-Switch.
 679  *
 680  * @return
 681  *   pointer to device private data structure containing data needed
 682  *   on success, NULL otherwise and rte_errno is set.
 683  */
 684 struct mlx5_priv *
 685 mlx5_dev_to_eswitch_info(struct rte_eth_dev *dev)
 686 {
 687         struct mlx5_priv *priv;
 688
 689         priv = dev->data->dev_private;
 690         if (!(priv->representor || priv->master)) {
 691                 rte_errno = EINVAL;
 692                 return NULL;
 693         }
 694         return priv;
 695 }
 696
 697 /**
 698  * DPDK callback to retrieve hairpin capabilities.
 699  *
 700  * @param dev
 701  *   Pointer to Ethernet device structure.
 702  * @param[out] cap
 703  *   Storage for hairpin capability data.
 704  *
 705  * @return
 706  *   0 on success, a negative errno value otherwise and rte_errno is set.
 707  */
 708 int
 709 mlx5_hairpin_cap_get(struct rte_eth_dev *dev, struct rte_eth_hairpin_cap *cap)
 710 {
 711         struct mlx5_priv *priv = dev->data->dev_private;
 712         struct mlx5_dev_config *config = &priv->config;
 713
 714         if (!priv->sh->devx || !config->dest_tir || !config->dv_flow_en) {
 715                 rte_errno = ENOTSUP;
 716                 return -rte_errno;
 717         }
 718         cap->max_nb_queues = UINT16_MAX;
 719         cap->max_rx_2_tx = 1;
 720         cap->max_tx_2_rx = 1;
 721         cap->max_nb_desc = 8192;
 722         return 0;
 723 }