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 <stdint.h> 11 #include <stdio.h> 12 #include <string.h> 13 #include <stdlib.h> 14 #include <errno.h> 15 #include <dirent.h> 16 #include <net/if.h> 17 #include <sys/ioctl.h> 18 #include <sys/socket.h> 19 #include <netinet/in.h> 20 #include <linux/ethtool.h> 21 #include <linux/sockios.h> 22 #include <fcntl.h> 23 #include <stdalign.h> 24 #include <sys/un.h> 25 #include <time.h> 26 27 #include <rte_atomic.h> 28 #include <rte_ethdev_driver.h> 29 #include <rte_bus_pci.h> 30 #include <rte_mbuf.h> 31 #include <rte_common.h> 32 #include <rte_interrupts.h> 33 #include <rte_malloc.h> 34 #include <rte_string_fns.h> 35 #include <rte_rwlock.h> 36 #include <rte_cycles.h> 37 38 #include "mlx5.h" 39 #include "mlx5_glue.h" 40 #include "mlx5_rxtx.h" 41 #include "mlx5_utils.h" 42 43 /* Supported speed values found in /usr/include/linux/ethtool.h */ 44 #ifndef HAVE_SUPPORTED_40000baseKR4_Full 45 #define SUPPORTED_40000baseKR4_Full (1 << 23) 46 #endif 47 #ifndef HAVE_SUPPORTED_40000baseCR4_Full 48 #define SUPPORTED_40000baseCR4_Full (1 << 24) 49 #endif 50 #ifndef HAVE_SUPPORTED_40000baseSR4_Full 51 #define SUPPORTED_40000baseSR4_Full (1 << 25) 52 #endif 53 #ifndef HAVE_SUPPORTED_40000baseLR4_Full 54 #define SUPPORTED_40000baseLR4_Full (1 << 26) 55 #endif 56 #ifndef HAVE_SUPPORTED_56000baseKR4_Full 57 #define SUPPORTED_56000baseKR4_Full (1 << 27) 58 #endif 59 #ifndef HAVE_SUPPORTED_56000baseCR4_Full 60 #define SUPPORTED_56000baseCR4_Full (1 << 28) 61 #endif 62 #ifndef HAVE_SUPPORTED_56000baseSR4_Full 63 #define SUPPORTED_56000baseSR4_Full (1 << 29) 64 #endif 65 #ifndef HAVE_SUPPORTED_56000baseLR4_Full 66 #define SUPPORTED_56000baseLR4_Full (1 << 30) 67 #endif 68 69 /* Add defines in case the running kernel is not the same as user headers. */ 70 #ifndef ETHTOOL_GLINKSETTINGS 71 struct ethtool_link_settings { 72 uint32_t cmd; 73 uint32_t speed; 74 uint8_t duplex; 75 uint8_t port; 76 uint8_t phy_address; 77 uint8_t autoneg; 78 uint8_t mdio_support; 79 uint8_t eth_to_mdix; 80 uint8_t eth_tp_mdix_ctrl; 81 int8_t link_mode_masks_nwords; 82 uint32_t reserved[8]; 83 uint32_t link_mode_masks[]; 84 }; 85 86 #define ETHTOOL_GLINKSETTINGS 0x0000004c 87 #define ETHTOOL_LINK_MODE_1000baseT_Full_BIT 5 88 #define ETHTOOL_LINK_MODE_Autoneg_BIT 6 89 #define ETHTOOL_LINK_MODE_1000baseKX_Full_BIT 17 90 #define ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT 18 91 #define ETHTOOL_LINK_MODE_10000baseKR_Full_BIT 19 92 #define ETHTOOL_LINK_MODE_10000baseR_FEC_BIT 20 93 #define ETHTOOL_LINK_MODE_20000baseMLD2_Full_BIT 21 94 #define ETHTOOL_LINK_MODE_20000baseKR2_Full_BIT 22 95 #define ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT 23 96 #define ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT 24 97 #define ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT 25 98 #define ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT 26 99 #define ETHTOOL_LINK_MODE_56000baseKR4_Full_BIT 27 100 #define ETHTOOL_LINK_MODE_56000baseCR4_Full_BIT 28 101 #define ETHTOOL_LINK_MODE_56000baseSR4_Full_BIT 29 102 #define ETHTOOL_LINK_MODE_56000baseLR4_Full_BIT 30 103 #endif 104 #ifndef HAVE_ETHTOOL_LINK_MODE_25G 105 #define ETHTOOL_LINK_MODE_25000baseCR_Full_BIT 31 106 #define ETHTOOL_LINK_MODE_25000baseKR_Full_BIT 32 107 #define ETHTOOL_LINK_MODE_25000baseSR_Full_BIT 33 108 #endif 109 #ifndef HAVE_ETHTOOL_LINK_MODE_50G 110 #define ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT 34 111 #define ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT 35 112 #endif 113 #ifndef HAVE_ETHTOOL_LINK_MODE_100G 114 #define ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT 36 115 #define ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT 37 116 #define ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT 38 117 #define ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT 39 118 #endif 119 120 /** 121 * Get master interface name from private structure. 122 * 123 * @param[in] dev 124 * Pointer to Ethernet device. 125 * @param[out] ifname 126 * Interface name output buffer. 127 * 128 * @return 129 * 0 on success, a negative errno value otherwise and rte_errno is set. 130 */ 131 int 132 mlx5_get_master_ifname(const char *ibdev_path, char (*ifname)[IF_NAMESIZE]) 133 { 134 DIR *dir; 135 struct dirent *dent; 136 unsigned int dev_type = 0; 137 unsigned int dev_port_prev = ~0u; 138 char match[IF_NAMESIZE] = ""; 139 140 assert(ibdev_path); 141 { 142 MKSTR(path, "%s/device/net", ibdev_path); 143 144 dir = opendir(path); 145 if (dir == NULL) { 146 rte_errno = errno; 147 return -rte_errno; 148 } 149 } 150 while ((dent = readdir(dir)) != NULL) { 151 char *name = dent->d_name; 152 FILE *file; 153 unsigned int dev_port; 154 int r; 155 156 if ((name[0] == '.') && 157 ((name[1] == '\0') || 158 ((name[1] == '.') && (name[2] == '\0')))) 159 continue; 160 161 MKSTR(path, "%s/device/net/%s/%s", 162 ibdev_path, name, 163 (dev_type ? "dev_id" : "dev_port")); 164 165 file = fopen(path, "rb"); 166 if (file == NULL) { 167 if (errno != ENOENT) 168 continue; 169 /* 170 * Switch to dev_id when dev_port does not exist as 171 * is the case with Linux kernel versions < 3.15. 172 */ 173 try_dev_id: 174 match[0] = '\0'; 175 if (dev_type) 176 break; 177 dev_type = 1; 178 dev_port_prev = ~0u; 179 rewinddir(dir); 180 continue; 181 } 182 r = fscanf(file, (dev_type ? "%x" : "%u"), &dev_port); 183 fclose(file); 184 if (r != 1) 185 continue; 186 /* 187 * Switch to dev_id when dev_port returns the same value for 188 * all ports. May happen when using a MOFED release older than 189 * 3.0 with a Linux kernel >= 3.15. 190 */ 191 if (dev_port == dev_port_prev) 192 goto try_dev_id; 193 dev_port_prev = dev_port; 194 if (dev_port == 0) 195 strlcpy(match, name, sizeof(match)); 196 } 197 closedir(dir); 198 if (match[0] == '\0') { 199 rte_errno = ENOENT; 200 return -rte_errno; 201 } 202 strncpy(*ifname, match, sizeof(*ifname)); 203 return 0; 204 } 205 206 /** 207 * Get interface name from private structure. 208 * 209 * This is a port representor-aware version of mlx5_get_master_ifname(). 210 * 211 * @param[in] dev 212 * Pointer to Ethernet device. 213 * @param[out] ifname 214 * Interface name output buffer. 215 * 216 * @return 217 * 0 on success, a negative errno value otherwise and rte_errno is set. 218 */ 219 int 220 mlx5_get_ifname(const struct rte_eth_dev *dev, char (*ifname)[IF_NAMESIZE]) 221 { 222 struct mlx5_priv *priv = dev->data->dev_private; 223 unsigned int ifindex; 224 225 assert(priv); 226 assert(priv->sh); 227 ifindex = priv->nl_socket_rdma >= 0 ? 228 mlx5_nl_ifindex(priv->nl_socket_rdma, 229 priv->sh->ibdev_name, 230 priv->ibv_port) : 0; 231 if (!ifindex) { 232 if (!priv->representor) 233 return mlx5_get_master_ifname(priv->sh->ibdev_path, 234 ifname); 235 rte_errno = ENXIO; 236 return -rte_errno; 237 } 238 if (if_indextoname(ifindex, &(*ifname)[0])) 239 return 0; 240 rte_errno = errno; 241 return -rte_errno; 242 } 243 244 /** 245 * Get interface name for the specified device, uses the extra base 246 * device resources to perform Netlink requests. 247 * 248 * This is a port representor-aware version of mlx5_get_master_ifname(). 249 * 250 * @param[in] base 251 * Pointer to Ethernet device to use Netlink socket from 252 * to perfrom requests. 253 * @param[in] dev 254 * Pointer to Ethernet device. 255 * @param[out] ifname 256 * Interface name output buffer. 257 * 258 * @return 259 * 0 on success, a negative errno value otherwise and rte_errno is set. 260 */ 261 int 262 mlx5_get_ifname_base(const struct rte_eth_dev *base, 263 const struct rte_eth_dev *dev, 264 char (*ifname)[IF_NAMESIZE]) 265 { 266 struct mlx5_priv *priv = dev->data->dev_private; 267 struct mlx5_priv *priv_base = base->data->dev_private; 268 unsigned int ifindex; 269 270 assert(priv); 271 assert(priv->sh); 272 assert(priv_base); 273 ifindex = priv_base->nl_socket_rdma >= 0 ? 274 mlx5_nl_ifindex(priv_base->nl_socket_rdma, 275 priv->sh->ibdev_name, 276 priv->ibv_port) : 0; 277 if (!ifindex) { 278 if (!priv->representor) 279 return mlx5_get_master_ifname(priv->sh->ibdev_path, 280 ifname); 281 rte_errno = ENXIO; 282 return -rte_errno; 283 } 284 if (if_indextoname(ifindex, &(*ifname)[0])) 285 return 0; 286 rte_errno = errno; 287 return -rte_errno; 288 } 289 /** 290 * Get the interface index from device name. 291 * 292 * @param[in] dev 293 * Pointer to Ethernet device. 294 * 295 * @return 296 * Nonzero interface index on success, zero otherwise and rte_errno is set. 297 */ 298 unsigned int 299 mlx5_ifindex(const struct rte_eth_dev *dev) 300 { 301 char ifname[IF_NAMESIZE]; 302 unsigned int ifindex; 303 304 if (mlx5_get_ifname(dev, &ifname)) 305 return 0; 306 ifindex = if_nametoindex(ifname); 307 if (!ifindex) 308 rte_errno = errno; 309 return ifindex; 310 } 311 312 /** 313 * Perform ifreq ioctl() on associated Ethernet device. 314 * 315 * @param[in] dev 316 * Pointer to Ethernet device. 317 * @param req 318 * Request number to pass to ioctl(). 319 * @param[out] ifr 320 * Interface request structure output buffer. 321 * 322 * @return 323 * 0 on success, a negative errno value otherwise and rte_errno is set. 324 */ 325 int 326 mlx5_ifreq(const struct rte_eth_dev *dev, int req, struct ifreq *ifr) 327 { 328 int sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP); 329 int ret = 0; 330 331 if (sock == -1) { 332 rte_errno = errno; 333 return -rte_errno; 334 } 335 ret = mlx5_get_ifname(dev, &ifr->ifr_name); 336 if (ret) 337 goto error; 338 ret = ioctl(sock, req, ifr); 339 if (ret == -1) { 340 rte_errno = errno; 341 goto error; 342 } 343 close(sock); 344 return 0; 345 error: 346 close(sock); 347 return -rte_errno; 348 } 349 350 /** 351 * Perform ifreq ioctl() on specified Ethernet device, 352 * ifindex, name and other attributes are requested 353 * on the base device to avoid specified device Netlink 354 * socket sharing (this is not thread-safe). 355 * 356 * @param[in] base 357 * Pointer to Ethernet device to get dev attributes. 358 * @param[in] dev 359 * Pointer to Ethernet device to perform ioctl. 360 * @param req 361 * Request number to pass to ioctl(). 362 * @param[out] ifr 363 * Interface request structure output buffer. 364 * 365 * @return 366 * 0 on success, a negative errno value otherwise and rte_errno is set. 367 */ 368 int 369 mlx5_ifreq_base(const struct rte_eth_dev *base, 370 const struct rte_eth_dev *dev, 371 int req, struct ifreq *ifr) 372 { 373 int sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP); 374 int ret = 0; 375 376 if (sock == -1) { 377 rte_errno = errno; 378 return -rte_errno; 379 } 380 ret = mlx5_get_ifname_base(base, dev, &ifr->ifr_name); 381 if (ret) 382 goto error; 383 ret = ioctl(sock, req, ifr); 384 if (ret == -1) { 385 rte_errno = errno; 386 goto error; 387 } 388 close(sock); 389 return 0; 390 error: 391 close(sock); 392 return -rte_errno; 393 } 394 395 /** 396 * Get device MTU. 397 * 398 * @param dev 399 * Pointer to Ethernet device. 400 * @param[out] mtu 401 * MTU value output buffer. 402 * 403 * @return 404 * 0 on success, a negative errno value otherwise and rte_errno is set. 405 */ 406 int 407 mlx5_get_mtu(struct rte_eth_dev *dev, uint16_t *mtu) 408 { 409 struct ifreq request; 410 int ret = mlx5_ifreq(dev, SIOCGIFMTU, &request); 411 412 if (ret) 413 return ret; 414 *mtu = request.ifr_mtu; 415 return 0; 416 } 417 418 /** 419 * Set device MTU. 420 * 421 * @param dev 422 * Pointer to Ethernet device. 423 * @param mtu 424 * MTU value to set. 425 * 426 * @return 427 * 0 on success, a negative errno value otherwise and rte_errno is set. 428 */ 429 static int 430 mlx5_set_mtu(struct rte_eth_dev *dev, uint16_t mtu) 431 { 432 struct ifreq request = { .ifr_mtu = mtu, }; 433 434 return mlx5_ifreq(dev, SIOCSIFMTU, &request); 435 } 436 437 /** 438 * Set device flags. 439 * 440 * @param dev 441 * Pointer to Ethernet device. 442 * @param keep 443 * Bitmask for flags that must remain untouched. 444 * @param flags 445 * Bitmask for flags to modify. 446 * 447 * @return 448 * 0 on success, a negative errno value otherwise and rte_errno is set. 449 */ 450 int 451 mlx5_set_flags(struct rte_eth_dev *dev, unsigned int keep, unsigned int flags) 452 { 453 struct ifreq request; 454 int ret = mlx5_ifreq(dev, SIOCGIFFLAGS, &request); 455 456 if (ret) 457 return ret; 458 request.ifr_flags &= keep; 459 request.ifr_flags |= flags & ~keep; 460 return mlx5_ifreq(dev, SIOCSIFFLAGS, &request); 461 } 462 463 /** 464 * DPDK callback for Ethernet device configuration. 465 * 466 * @param dev 467 * Pointer to Ethernet device structure. 468 * 469 * @return 470 * 0 on success, a negative errno value otherwise and rte_errno is set. 471 */ 472 int 473 mlx5_dev_configure(struct rte_eth_dev *dev) 474 { 475 struct mlx5_priv *priv = dev->data->dev_private; 476 unsigned int rxqs_n = dev->data->nb_rx_queues; 477 unsigned int txqs_n = dev->data->nb_tx_queues; 478 unsigned int i; 479 unsigned int j; 480 unsigned int reta_idx_n; 481 const uint8_t use_app_rss_key = 482 !!dev->data->dev_conf.rx_adv_conf.rss_conf.rss_key; 483 int ret = 0; 484 485 if (use_app_rss_key && 486 (dev->data->dev_conf.rx_adv_conf.rss_conf.rss_key_len != 487 MLX5_RSS_HASH_KEY_LEN)) { 488 DRV_LOG(ERR, "port %u RSS key len must be %s Bytes long", 489 dev->data->port_id, RTE_STR(MLX5_RSS_HASH_KEY_LEN)); 490 rte_errno = EINVAL; 491 return -rte_errno; 492 } 493 priv->rss_conf.rss_key = 494 rte_realloc(priv->rss_conf.rss_key, 495 MLX5_RSS_HASH_KEY_LEN, 0); 496 if (!priv->rss_conf.rss_key) { 497 DRV_LOG(ERR, "port %u cannot allocate RSS hash key memory (%u)", 498 dev->data->port_id, rxqs_n); 499 rte_errno = ENOMEM; 500 return -rte_errno; 501 } 502 memcpy(priv->rss_conf.rss_key, 503 use_app_rss_key ? 504 dev->data->dev_conf.rx_adv_conf.rss_conf.rss_key : 505 rss_hash_default_key, 506 MLX5_RSS_HASH_KEY_LEN); 507 priv->rss_conf.rss_key_len = MLX5_RSS_HASH_KEY_LEN; 508 priv->rss_conf.rss_hf = dev->data->dev_conf.rx_adv_conf.rss_conf.rss_hf; 509 priv->rxqs = (void *)dev->data->rx_queues; 510 priv->txqs = (void *)dev->data->tx_queues; 511 if (txqs_n != priv->txqs_n) { 512 DRV_LOG(INFO, "port %u Tx queues number update: %u -> %u", 513 dev->data->port_id, priv->txqs_n, txqs_n); 514 priv->txqs_n = txqs_n; 515 } 516 if (rxqs_n > priv->config.ind_table_max_size) { 517 DRV_LOG(ERR, "port %u cannot handle this many Rx queues (%u)", 518 dev->data->port_id, rxqs_n); 519 rte_errno = EINVAL; 520 return -rte_errno; 521 } 522 if (rxqs_n != priv->rxqs_n) { 523 DRV_LOG(INFO, "port %u Rx queues number update: %u -> %u", 524 dev->data->port_id, priv->rxqs_n, rxqs_n); 525 priv->rxqs_n = rxqs_n; 526 /* 527 * If the requested number of RX queues is not a power of two, 528 * use the maximum indirection table size for better balancing. 529 * The result is always rounded to the next power of two. 530 */ 531 reta_idx_n = (1 << log2above((rxqs_n & (rxqs_n - 1)) ? 532 priv->config.ind_table_max_size : 533 rxqs_n)); 534 ret = mlx5_rss_reta_index_resize(dev, reta_idx_n); 535 if (ret) 536 return ret; 537 /* 538 * When the number of RX queues is not a power of two, 539 * the remaining table entries are padded with reused WQs 540 * and hashes are not spread uniformly. 541 */ 542 for (i = 0, j = 0; (i != reta_idx_n); ++i) { 543 (*priv->reta_idx)[i] = j; 544 if (++j == rxqs_n) 545 j = 0; 546 } 547 } 548 ret = mlx5_proc_priv_init(dev); 549 if (ret) 550 return ret; 551 return 0; 552 } 553 554 /** 555 * Sets default tuning parameters. 556 * 557 * @param dev 558 * Pointer to Ethernet device. 559 * @param[out] info 560 * Info structure output buffer. 561 */ 562 static void 563 mlx5_set_default_params(struct rte_eth_dev *dev, struct rte_eth_dev_info *info) 564 { 565 struct mlx5_priv *priv = dev->data->dev_private; 566 567 /* Minimum CPU utilization. */ 568 info->default_rxportconf.ring_size = 256; 569 info->default_txportconf.ring_size = 256; 570 info->default_rxportconf.burst_size = 64; 571 info->default_txportconf.burst_size = 64; 572 if (priv->link_speed_capa & ETH_LINK_SPEED_100G) { 573 info->default_rxportconf.nb_queues = 16; 574 info->default_txportconf.nb_queues = 16; 575 if (dev->data->nb_rx_queues > 2 || 576 dev->data->nb_tx_queues > 2) { 577 /* Max Throughput. */ 578 info->default_rxportconf.ring_size = 2048; 579 info->default_txportconf.ring_size = 2048; 580 } 581 } else { 582 info->default_rxportconf.nb_queues = 8; 583 info->default_txportconf.nb_queues = 8; 584 if (dev->data->nb_rx_queues > 2 || 585 dev->data->nb_tx_queues > 2) { 586 /* Max Throughput. */ 587 info->default_rxportconf.ring_size = 4096; 588 info->default_txportconf.ring_size = 4096; 589 } 590 } 591 } 592 593 /** 594 * DPDK callback to get information about the device. 595 * 596 * @param dev 597 * Pointer to Ethernet device structure. 598 * @param[out] info 599 * Info structure output buffer. 600 */ 601 void 602 mlx5_dev_infos_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *info) 603 { 604 struct mlx5_priv *priv = dev->data->dev_private; 605 struct mlx5_dev_config *config = &priv->config; 606 unsigned int max; 607 char ifname[IF_NAMESIZE]; 608 609 /* FIXME: we should ask the device for these values. */ 610 info->min_rx_bufsize = 32; 611 info->max_rx_pktlen = 65536; 612 /* 613 * Since we need one CQ per QP, the limit is the minimum number 614 * between the two values. 615 */ 616 max = RTE_MIN(priv->sh->device_attr.orig_attr.max_cq, 617 priv->sh->device_attr.orig_attr.max_qp); 618 /* If max >= 65535 then max = 0, max_rx_queues is uint16_t. */ 619 if (max >= 65535) 620 max = 65535; 621 info->max_rx_queues = max; 622 info->max_tx_queues = max; 623 info->max_mac_addrs = MLX5_MAX_UC_MAC_ADDRESSES; 624 info->rx_queue_offload_capa = mlx5_get_rx_queue_offloads(dev); 625 info->rx_offload_capa = (mlx5_get_rx_port_offloads() | 626 info->rx_queue_offload_capa); 627 info->tx_offload_capa = mlx5_get_tx_port_offloads(dev); 628 if (mlx5_get_ifname(dev, &ifname) == 0) 629 info->if_index = if_nametoindex(ifname); 630 info->reta_size = priv->reta_idx_n ? 631 priv->reta_idx_n : config->ind_table_max_size; 632 info->hash_key_size = MLX5_RSS_HASH_KEY_LEN; 633 info->speed_capa = priv->link_speed_capa; 634 info->flow_type_rss_offloads = ~MLX5_RSS_HF_MASK; 635 mlx5_set_default_params(dev, info); 636 info->switch_info.name = dev->data->name; 637 info->switch_info.domain_id = priv->domain_id; 638 info->switch_info.port_id = priv->representor_id; 639 if (priv->representor) { 640 unsigned int i = mlx5_dev_to_port_id(dev->device, NULL, 0); 641 uint16_t port_id[i]; 642 643 i = RTE_MIN(mlx5_dev_to_port_id(dev->device, port_id, i), i); 644 while (i--) { 645 struct mlx5_priv *opriv = 646 rte_eth_devices[port_id[i]].data->dev_private; 647 648 if (!opriv || 649 opriv->representor || 650 opriv->domain_id != priv->domain_id) 651 continue; 652 /* 653 * Override switch name with that of the master 654 * device. 655 */ 656 info->switch_info.name = opriv->dev_data->name; 657 break; 658 } 659 } 660 } 661 662 /** 663 * Get device current raw clock counter 664 * 665 * @param dev 666 * Pointer to Ethernet device structure. 667 * @param[out] time 668 * Current raw clock counter of the device. 669 * 670 * @return 671 * 0 if the clock has correctly been read 672 * The value of errno in case of error 673 */ 674 int 675 mlx5_read_clock(struct rte_eth_dev *dev, uint64_t *clock) 676 { 677 struct mlx5_priv *priv = dev->data->dev_private; 678 struct ibv_context *ctx = priv->sh->ctx; 679 struct ibv_values_ex values; 680 int err = 0; 681 682 values.comp_mask = IBV_VALUES_MASK_RAW_CLOCK; 683 err = mlx5_glue->query_rt_values_ex(ctx, &values); 684 if (err != 0) { 685 DRV_LOG(WARNING, "Could not query the clock !"); 686 return err; 687 } 688 *clock = values.raw_clock.tv_nsec; 689 return 0; 690 } 691 692 /** 693 * Get firmware version of a device. 694 * 695 * @param dev 696 * Ethernet device port. 697 * @param fw_ver 698 * String output allocated by caller. 699 * @param fw_size 700 * Size of the output string, including terminating null byte. 701 * 702 * @return 703 * 0 on success, or the size of the non truncated string if too big. 704 */ 705 int mlx5_fw_version_get(struct rte_eth_dev *dev, char *fw_ver, size_t fw_size) 706 { 707 struct mlx5_priv *priv = dev->data->dev_private; 708 struct ibv_device_attr *attr = &priv->sh->device_attr.orig_attr; 709 size_t size = strnlen(attr->fw_ver, sizeof(attr->fw_ver)) + 1; 710 711 if (fw_size < size) 712 return size; 713 if (fw_ver != NULL) 714 strlcpy(fw_ver, attr->fw_ver, fw_size); 715 return 0; 716 } 717 718 /** 719 * Get supported packet types. 720 * 721 * @param dev 722 * Pointer to Ethernet device structure. 723 * 724 * @return 725 * A pointer to the supported Packet types array. 726 */ 727 const uint32_t * 728 mlx5_dev_supported_ptypes_get(struct rte_eth_dev *dev) 729 { 730 static const uint32_t ptypes[] = { 731 /* refers to rxq_cq_to_pkt_type() */ 732 RTE_PTYPE_L2_ETHER, 733 RTE_PTYPE_L3_IPV4_EXT_UNKNOWN, 734 RTE_PTYPE_L3_IPV6_EXT_UNKNOWN, 735 RTE_PTYPE_L4_NONFRAG, 736 RTE_PTYPE_L4_FRAG, 737 RTE_PTYPE_L4_TCP, 738 RTE_PTYPE_L4_UDP, 739 RTE_PTYPE_INNER_L3_IPV4_EXT_UNKNOWN, 740 RTE_PTYPE_INNER_L3_IPV6_EXT_UNKNOWN, 741 RTE_PTYPE_INNER_L4_NONFRAG, 742 RTE_PTYPE_INNER_L4_FRAG, 743 RTE_PTYPE_INNER_L4_TCP, 744 RTE_PTYPE_INNER_L4_UDP, 745 RTE_PTYPE_UNKNOWN 746 }; 747 748 if (dev->rx_pkt_burst == mlx5_rx_burst || 749 dev->rx_pkt_burst == mlx5_rx_burst_mprq || 750 dev->rx_pkt_burst == mlx5_rx_burst_vec) 751 return ptypes; 752 return NULL; 753 } 754 755 /** 756 * Retrieve the master device for representor in the same switch domain. 757 * 758 * @param dev 759 * Pointer to representor Ethernet device structure. 760 * 761 * @return 762 * Master device structure on success, NULL otherwise. 763 */ 764 765 static struct rte_eth_dev * 766 mlx5_find_master_dev(struct rte_eth_dev *dev) 767 { 768 struct mlx5_priv *priv; 769 uint16_t port_id; 770 uint16_t domain_id; 771 772 priv = dev->data->dev_private; 773 domain_id = priv->domain_id; 774 assert(priv->representor); 775 RTE_ETH_FOREACH_DEV_OF(port_id, dev->device) { 776 priv = rte_eth_devices[port_id].data->dev_private; 777 if (priv && 778 priv->master && 779 priv->domain_id == domain_id) 780 return &rte_eth_devices[port_id]; 781 } 782 return NULL; 783 } 784 785 /** 786 * DPDK callback to retrieve physical link information. 787 * 788 * @param dev 789 * Pointer to Ethernet device structure. 790 * @param[out] link 791 * Storage for current link status. 792 * 793 * @return 794 * 0 on success, a negative errno value otherwise and rte_errno is set. 795 */ 796 static int 797 mlx5_link_update_unlocked_gset(struct rte_eth_dev *dev, 798 struct rte_eth_link *link) 799 { 800 struct mlx5_priv *priv = dev->data->dev_private; 801 struct ethtool_cmd edata = { 802 .cmd = ETHTOOL_GSET /* Deprecated since Linux v4.5. */ 803 }; 804 struct ifreq ifr; 805 struct rte_eth_link dev_link; 806 int link_speed = 0; 807 int ret; 808 809 ret = mlx5_ifreq(dev, SIOCGIFFLAGS, &ifr); 810 if (ret) { 811 DRV_LOG(WARNING, "port %u ioctl(SIOCGIFFLAGS) failed: %s", 812 dev->data->port_id, strerror(rte_errno)); 813 return ret; 814 } 815 dev_link = (struct rte_eth_link) { 816 .link_status = ((ifr.ifr_flags & IFF_UP) && 817 (ifr.ifr_flags & IFF_RUNNING)), 818 }; 819 ifr = (struct ifreq) { 820 .ifr_data = (void *)&edata, 821 }; 822 ret = mlx5_ifreq(dev, SIOCETHTOOL, &ifr); 823 if (ret) { 824 if (ret == -ENOTSUP && priv->representor) { 825 struct rte_eth_dev *master; 826 827 /* 828 * For representors we can try to inherit link 829 * settings from the master device. Actually 830 * link settings do not make a lot of sense 831 * for representors due to missing physical 832 * link. The old kernel drivers supported 833 * emulated settings query for representors, 834 * the new ones do not, so we have to add 835 * this code for compatibility issues. 836 */ 837 master = mlx5_find_master_dev(dev); 838 if (master) { 839 ifr = (struct ifreq) { 840 .ifr_data = (void *)&edata, 841 }; 842 /* 843 * Use special version of mlx5_ifreq() 844 * to get master device name with local 845 * device Netlink socket. Using master 846 * device Netlink socket is not thread 847 * safe. 848 */ 849 ret = mlx5_ifreq_base(dev, master, 850 SIOCETHTOOL, &ifr); 851 } 852 } 853 if (ret) { 854 DRV_LOG(WARNING, 855 "port %u ioctl(SIOCETHTOOL," 856 " ETHTOOL_GSET) failed: %s", 857 dev->data->port_id, strerror(rte_errno)); 858 return ret; 859 } 860 } 861 link_speed = ethtool_cmd_speed(&edata); 862 if (link_speed == -1) 863 dev_link.link_speed = ETH_SPEED_NUM_NONE; 864 else 865 dev_link.link_speed = link_speed; 866 priv->link_speed_capa = 0; 867 if (edata.supported & SUPPORTED_Autoneg) 868 priv->link_speed_capa |= ETH_LINK_SPEED_AUTONEG; 869 if (edata.supported & (SUPPORTED_1000baseT_Full | 870 SUPPORTED_1000baseKX_Full)) 871 priv->link_speed_capa |= ETH_LINK_SPEED_1G; 872 if (edata.supported & SUPPORTED_10000baseKR_Full) 873 priv->link_speed_capa |= ETH_LINK_SPEED_10G; 874 if (edata.supported & (SUPPORTED_40000baseKR4_Full | 875 SUPPORTED_40000baseCR4_Full | 876 SUPPORTED_40000baseSR4_Full | 877 SUPPORTED_40000baseLR4_Full)) 878 priv->link_speed_capa |= ETH_LINK_SPEED_40G; 879 dev_link.link_duplex = ((edata.duplex == DUPLEX_HALF) ? 880 ETH_LINK_HALF_DUPLEX : ETH_LINK_FULL_DUPLEX); 881 dev_link.link_autoneg = !(dev->data->dev_conf.link_speeds & 882 ETH_LINK_SPEED_FIXED); 883 if (((dev_link.link_speed && !dev_link.link_status) || 884 (!dev_link.link_speed && dev_link.link_status))) { 885 rte_errno = EAGAIN; 886 return -rte_errno; 887 } 888 *link = dev_link; 889 return 0; 890 } 891 892 /** 893 * Retrieve physical link information (unlocked version using new ioctl). 894 * 895 * @param dev 896 * Pointer to Ethernet device structure. 897 * @param[out] link 898 * Storage for current link status. 899 * 900 * @return 901 * 0 on success, a negative errno value otherwise and rte_errno is set. 902 */ 903 static int 904 mlx5_link_update_unlocked_gs(struct rte_eth_dev *dev, 905 struct rte_eth_link *link) 906 907 { 908 struct mlx5_priv *priv = dev->data->dev_private; 909 struct ethtool_link_settings gcmd = { .cmd = ETHTOOL_GLINKSETTINGS }; 910 struct ifreq ifr; 911 struct rte_eth_link dev_link; 912 struct rte_eth_dev *master = NULL; 913 uint64_t sc; 914 int ret; 915 916 ret = mlx5_ifreq(dev, SIOCGIFFLAGS, &ifr); 917 if (ret) { 918 DRV_LOG(WARNING, "port %u ioctl(SIOCGIFFLAGS) failed: %s", 919 dev->data->port_id, strerror(rte_errno)); 920 return ret; 921 } 922 dev_link = (struct rte_eth_link) { 923 .link_status = ((ifr.ifr_flags & IFF_UP) && 924 (ifr.ifr_flags & IFF_RUNNING)), 925 }; 926 ifr = (struct ifreq) { 927 .ifr_data = (void *)&gcmd, 928 }; 929 ret = mlx5_ifreq(dev, SIOCETHTOOL, &ifr); 930 if (ret) { 931 if (ret == -ENOTSUP && priv->representor) { 932 /* 933 * For representors we can try to inherit link 934 * settings from the master device. Actually 935 * link settings do not make a lot of sense 936 * for representors due to missing physical 937 * link. The old kernel drivers supported 938 * emulated settings query for representors, 939 * the new ones do not, so we have to add 940 * this code for compatibility issues. 941 */ 942 master = mlx5_find_master_dev(dev); 943 if (master) { 944 ifr = (struct ifreq) { 945 .ifr_data = (void *)&gcmd, 946 }; 947 /* 948 * Avoid using master Netlink socket. 949 * This is not thread-safe. 950 */ 951 ret = mlx5_ifreq_base(dev, master, 952 SIOCETHTOOL, &ifr); 953 } 954 } 955 if (ret) { 956 DRV_LOG(DEBUG, 957 "port %u ioctl(SIOCETHTOOL," 958 " ETHTOOL_GLINKSETTINGS) failed: %s", 959 dev->data->port_id, strerror(rte_errno)); 960 return ret; 961 } 962 963 } 964 gcmd.link_mode_masks_nwords = -gcmd.link_mode_masks_nwords; 965 966 alignas(struct ethtool_link_settings) 967 uint8_t data[offsetof(struct ethtool_link_settings, link_mode_masks) + 968 sizeof(uint32_t) * gcmd.link_mode_masks_nwords * 3]; 969 struct ethtool_link_settings *ecmd = (void *)data; 970 971 *ecmd = gcmd; 972 ifr.ifr_data = (void *)ecmd; 973 ret = mlx5_ifreq_base(dev, master ? master : dev, SIOCETHTOOL, &ifr); 974 if (ret) { 975 DRV_LOG(DEBUG, 976 "port %u ioctl(SIOCETHTOOL," 977 "ETHTOOL_GLINKSETTINGS) failed: %s", 978 dev->data->port_id, strerror(rte_errno)); 979 return ret; 980 } 981 dev_link.link_speed = ecmd->speed; 982 sc = ecmd->link_mode_masks[0] | 983 ((uint64_t)ecmd->link_mode_masks[1] << 32); 984 priv->link_speed_capa = 0; 985 if (sc & MLX5_BITSHIFT(ETHTOOL_LINK_MODE_Autoneg_BIT)) 986 priv->link_speed_capa |= ETH_LINK_SPEED_AUTONEG; 987 if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_1000baseT_Full_BIT) | 988 MLX5_BITSHIFT(ETHTOOL_LINK_MODE_1000baseKX_Full_BIT))) 989 priv->link_speed_capa |= ETH_LINK_SPEED_1G; 990 if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT) | 991 MLX5_BITSHIFT(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT) | 992 MLX5_BITSHIFT(ETHTOOL_LINK_MODE_10000baseR_FEC_BIT))) 993 priv->link_speed_capa |= ETH_LINK_SPEED_10G; 994 if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_20000baseMLD2_Full_BIT) | 995 MLX5_BITSHIFT(ETHTOOL_LINK_MODE_20000baseKR2_Full_BIT))) 996 priv->link_speed_capa |= ETH_LINK_SPEED_20G; 997 if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT) | 998 MLX5_BITSHIFT(ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT) | 999 MLX5_BITSHIFT(ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT) | 1000 MLX5_BITSHIFT(ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT))) 1001 priv->link_speed_capa |= ETH_LINK_SPEED_40G; 1002 if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_56000baseKR4_Full_BIT) | 1003 MLX5_BITSHIFT(ETHTOOL_LINK_MODE_56000baseCR4_Full_BIT) | 1004 MLX5_BITSHIFT(ETHTOOL_LINK_MODE_56000baseSR4_Full_BIT) | 1005 MLX5_BITSHIFT(ETHTOOL_LINK_MODE_56000baseLR4_Full_BIT))) 1006 priv->link_speed_capa |= ETH_LINK_SPEED_56G; 1007 if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_25000baseCR_Full_BIT) | 1008 MLX5_BITSHIFT(ETHTOOL_LINK_MODE_25000baseKR_Full_BIT) | 1009 MLX5_BITSHIFT(ETHTOOL_LINK_MODE_25000baseSR_Full_BIT))) 1010 priv->link_speed_capa |= ETH_LINK_SPEED_25G; 1011 if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT) | 1012 MLX5_BITSHIFT(ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT))) 1013 priv->link_speed_capa |= ETH_LINK_SPEED_50G; 1014 if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT) | 1015 MLX5_BITSHIFT(ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT) | 1016 MLX5_BITSHIFT(ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT) | 1017 MLX5_BITSHIFT(ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT))) 1018 priv->link_speed_capa |= ETH_LINK_SPEED_100G; 1019 dev_link.link_duplex = ((ecmd->duplex == DUPLEX_HALF) ? 1020 ETH_LINK_HALF_DUPLEX : ETH_LINK_FULL_DUPLEX); 1021 dev_link.link_autoneg = !(dev->data->dev_conf.link_speeds & 1022 ETH_LINK_SPEED_FIXED); 1023 if (((dev_link.link_speed && !dev_link.link_status) || 1024 (!dev_link.link_speed && dev_link.link_status))) { 1025 rte_errno = EAGAIN; 1026 return -rte_errno; 1027 } 1028 *link = dev_link; 1029 return 0; 1030 } 1031 1032 /** 1033 * DPDK callback to retrieve physical link information. 1034 * 1035 * @param dev 1036 * Pointer to Ethernet device structure. 1037 * @param wait_to_complete 1038 * Wait for request completion. 1039 * 1040 * @return 1041 * 0 if link status was not updated, positive if it was, a negative errno 1042 * value otherwise and rte_errno is set. 1043 */ 1044 int 1045 mlx5_link_update(struct rte_eth_dev *dev, int wait_to_complete) 1046 { 1047 int ret; 1048 struct rte_eth_link dev_link; 1049 time_t start_time = time(NULL); 1050 1051 do { 1052 ret = mlx5_link_update_unlocked_gs(dev, &dev_link); 1053 if (ret) 1054 ret = mlx5_link_update_unlocked_gset(dev, &dev_link); 1055 if (ret == 0) 1056 break; 1057 /* Handle wait to complete situation. */ 1058 if (wait_to_complete && ret == -EAGAIN) { 1059 if (abs((int)difftime(time(NULL), start_time)) < 1060 MLX5_LINK_STATUS_TIMEOUT) { 1061 usleep(0); 1062 continue; 1063 } else { 1064 rte_errno = EBUSY; 1065 return -rte_errno; 1066 } 1067 } else if (ret < 0) { 1068 return ret; 1069 } 1070 } while (wait_to_complete); 1071 ret = !!memcmp(&dev->data->dev_link, &dev_link, 1072 sizeof(struct rte_eth_link)); 1073 dev->data->dev_link = dev_link; 1074 return ret; 1075 } 1076 1077 /** 1078 * DPDK callback to change the MTU. 1079 * 1080 * @param dev 1081 * Pointer to Ethernet device structure. 1082 * @param in_mtu 1083 * New MTU. 1084 * 1085 * @return 1086 * 0 on success, a negative errno value otherwise and rte_errno is set. 1087 */ 1088 int 1089 mlx5_dev_set_mtu(struct rte_eth_dev *dev, uint16_t mtu) 1090 { 1091 struct mlx5_priv *priv = dev->data->dev_private; 1092 uint16_t kern_mtu = 0; 1093 int ret; 1094 1095 ret = mlx5_get_mtu(dev, &kern_mtu); 1096 if (ret) 1097 return ret; 1098 /* Set kernel interface MTU first. */ 1099 ret = mlx5_set_mtu(dev, mtu); 1100 if (ret) 1101 return ret; 1102 ret = mlx5_get_mtu(dev, &kern_mtu); 1103 if (ret) 1104 return ret; 1105 if (kern_mtu == mtu) { 1106 priv->mtu = mtu; 1107 DRV_LOG(DEBUG, "port %u adapter MTU set to %u", 1108 dev->data->port_id, mtu); 1109 return 0; 1110 } 1111 rte_errno = EAGAIN; 1112 return -rte_errno; 1113 } 1114 1115 /** 1116 * DPDK callback to get flow control status. 1117 * 1118 * @param dev 1119 * Pointer to Ethernet device structure. 1120 * @param[out] fc_conf 1121 * Flow control output buffer. 1122 * 1123 * @return 1124 * 0 on success, a negative errno value otherwise and rte_errno is set. 1125 */ 1126 int 1127 mlx5_dev_get_flow_ctrl(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf) 1128 { 1129 struct ifreq ifr; 1130 struct ethtool_pauseparam ethpause = { 1131 .cmd = ETHTOOL_GPAUSEPARAM 1132 }; 1133 int ret; 1134 1135 ifr.ifr_data = (void *)ðpause; 1136 ret = mlx5_ifreq(dev, SIOCETHTOOL, &ifr); 1137 if (ret) { 1138 DRV_LOG(WARNING, 1139 "port %u ioctl(SIOCETHTOOL, ETHTOOL_GPAUSEPARAM) failed:" 1140 " %s", 1141 dev->data->port_id, strerror(rte_errno)); 1142 return ret; 1143 } 1144 fc_conf->autoneg = ethpause.autoneg; 1145 if (ethpause.rx_pause && ethpause.tx_pause) 1146 fc_conf->mode = RTE_FC_FULL; 1147 else if (ethpause.rx_pause) 1148 fc_conf->mode = RTE_FC_RX_PAUSE; 1149 else if (ethpause.tx_pause) 1150 fc_conf->mode = RTE_FC_TX_PAUSE; 1151 else 1152 fc_conf->mode = RTE_FC_NONE; 1153 return 0; 1154 } 1155 1156 /** 1157 * DPDK callback to modify flow control parameters. 1158 * 1159 * @param dev 1160 * Pointer to Ethernet device structure. 1161 * @param[in] fc_conf 1162 * Flow control parameters. 1163 * 1164 * @return 1165 * 0 on success, a negative errno value otherwise and rte_errno is set. 1166 */ 1167 int 1168 mlx5_dev_set_flow_ctrl(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf) 1169 { 1170 struct ifreq ifr; 1171 struct ethtool_pauseparam ethpause = { 1172 .cmd = ETHTOOL_SPAUSEPARAM 1173 }; 1174 int ret; 1175 1176 ifr.ifr_data = (void *)ðpause; 1177 ethpause.autoneg = fc_conf->autoneg; 1178 if (((fc_conf->mode & RTE_FC_FULL) == RTE_FC_FULL) || 1179 (fc_conf->mode & RTE_FC_RX_PAUSE)) 1180 ethpause.rx_pause = 1; 1181 else 1182 ethpause.rx_pause = 0; 1183 1184 if (((fc_conf->mode & RTE_FC_FULL) == RTE_FC_FULL) || 1185 (fc_conf->mode & RTE_FC_TX_PAUSE)) 1186 ethpause.tx_pause = 1; 1187 else 1188 ethpause.tx_pause = 0; 1189 ret = mlx5_ifreq(dev, SIOCETHTOOL, &ifr); 1190 if (ret) { 1191 DRV_LOG(WARNING, 1192 "port %u ioctl(SIOCETHTOOL, ETHTOOL_SPAUSEPARAM)" 1193 " failed: %s", 1194 dev->data->port_id, strerror(rte_errno)); 1195 return ret; 1196 } 1197 return 0; 1198 } 1199 1200 /** 1201 * Get PCI information from struct ibv_device. 1202 * 1203 * @param device 1204 * Pointer to Ethernet device structure. 1205 * @param[out] pci_addr 1206 * PCI bus address output buffer. 1207 * 1208 * @return 1209 * 0 on success, a negative errno value otherwise and rte_errno is set. 1210 */ 1211 int 1212 mlx5_ibv_device_to_pci_addr(const struct ibv_device *device, 1213 struct rte_pci_addr *pci_addr) 1214 { 1215 FILE *file; 1216 char line[32]; 1217 MKSTR(path, "%s/device/uevent", device->ibdev_path); 1218 1219 file = fopen(path, "rb"); 1220 if (file == NULL) { 1221 rte_errno = errno; 1222 return -rte_errno; 1223 } 1224 while (fgets(line, sizeof(line), file) == line) { 1225 size_t len = strlen(line); 1226 int ret; 1227 1228 /* Truncate long lines. */ 1229 if (len == (sizeof(line) - 1)) 1230 while (line[(len - 1)] != '\n') { 1231 ret = fgetc(file); 1232 if (ret == EOF) 1233 break; 1234 line[(len - 1)] = ret; 1235 } 1236 /* Extract information. */ 1237 if (sscanf(line, 1238 "PCI_SLOT_NAME=" 1239 "%" SCNx32 ":%" SCNx8 ":%" SCNx8 ".%" SCNx8 "\n", 1240 &pci_addr->domain, 1241 &pci_addr->bus, 1242 &pci_addr->devid, 1243 &pci_addr->function) == 4) { 1244 ret = 0; 1245 break; 1246 } 1247 } 1248 fclose(file); 1249 return 0; 1250 } 1251 1252 /** 1253 * Handle asynchronous removal event for entire multiport device. 1254 * 1255 * @param sh 1256 * Infiniband device shared context. 1257 */ 1258 static void 1259 mlx5_dev_interrupt_device_fatal(struct mlx5_ibv_shared *sh) 1260 { 1261 uint32_t i; 1262 1263 for (i = 0; i < sh->max_port; ++i) { 1264 struct rte_eth_dev *dev; 1265 1266 if (sh->port[i].ih_port_id >= RTE_MAX_ETHPORTS) { 1267 /* 1268 * Or not existing port either no 1269 * handler installed for this port. 1270 */ 1271 continue; 1272 } 1273 dev = &rte_eth_devices[sh->port[i].ih_port_id]; 1274 assert(dev); 1275 if (dev->data->dev_conf.intr_conf.rmv) 1276 _rte_eth_dev_callback_process 1277 (dev, RTE_ETH_EVENT_INTR_RMV, NULL); 1278 } 1279 } 1280 1281 /** 1282 * Handle shared asynchronous events the NIC (removal event 1283 * and link status change). Supports multiport IB device. 1284 * 1285 * @param cb_arg 1286 * Callback argument. 1287 */ 1288 void 1289 mlx5_dev_interrupt_handler(void *cb_arg) 1290 { 1291 struct mlx5_ibv_shared *sh = cb_arg; 1292 struct ibv_async_event event; 1293 1294 /* Read all message from the IB device and acknowledge them. */ 1295 for (;;) { 1296 struct rte_eth_dev *dev; 1297 uint32_t tmp; 1298 1299 if (mlx5_glue->get_async_event(sh->ctx, &event)) 1300 break; 1301 /* Retrieve and check IB port index. */ 1302 tmp = (uint32_t)event.element.port_num; 1303 if (!tmp && event.event_type == IBV_EVENT_DEVICE_FATAL) { 1304 /* 1305 * The DEVICE_FATAL event is called once for 1306 * entire device without port specifying. 1307 * We should notify all existing ports. 1308 */ 1309 mlx5_glue->ack_async_event(&event); 1310 mlx5_dev_interrupt_device_fatal(sh); 1311 continue; 1312 } 1313 assert(tmp && (tmp <= sh->max_port)); 1314 if (!tmp) { 1315 /* Unsupported devive level event. */ 1316 mlx5_glue->ack_async_event(&event); 1317 DRV_LOG(DEBUG, 1318 "unsupported common event (type %d)", 1319 event.event_type); 1320 continue; 1321 } 1322 if (tmp > sh->max_port) { 1323 /* Invalid IB port index. */ 1324 mlx5_glue->ack_async_event(&event); 1325 DRV_LOG(DEBUG, 1326 "cannot handle an event (type %d)" 1327 "due to invalid IB port index (%u)", 1328 event.event_type, tmp); 1329 continue; 1330 } 1331 if (sh->port[tmp - 1].ih_port_id >= RTE_MAX_ETHPORTS) { 1332 /* No handler installed. */ 1333 mlx5_glue->ack_async_event(&event); 1334 DRV_LOG(DEBUG, 1335 "cannot handle an event (type %d)" 1336 "due to no handler installed for port %u", 1337 event.event_type, tmp); 1338 continue; 1339 } 1340 /* Retrieve ethernet device descriptor. */ 1341 tmp = sh->port[tmp - 1].ih_port_id; 1342 dev = &rte_eth_devices[tmp]; 1343 assert(dev); 1344 if ((event.event_type == IBV_EVENT_PORT_ACTIVE || 1345 event.event_type == IBV_EVENT_PORT_ERR) && 1346 dev->data->dev_conf.intr_conf.lsc) { 1347 mlx5_glue->ack_async_event(&event); 1348 if (mlx5_link_update(dev, 0) == -EAGAIN) { 1349 usleep(0); 1350 continue; 1351 } 1352 _rte_eth_dev_callback_process 1353 (dev, RTE_ETH_EVENT_INTR_LSC, NULL); 1354 continue; 1355 } 1356 DRV_LOG(DEBUG, 1357 "port %u cannot handle an unknown event (type %d)", 1358 dev->data->port_id, event.event_type); 1359 mlx5_glue->ack_async_event(&event); 1360 } 1361 } 1362 1363 /* 1364 * Unregister callback handler safely. The handler may be active 1365 * while we are trying to unregister it, in this case code -EAGAIN 1366 * is returned by rte_intr_callback_unregister(). This routine checks 1367 * the return code and tries to unregister handler again. 1368 * 1369 * @param handle 1370 * interrupt handle 1371 * @param cb_fn 1372 * pointer to callback routine 1373 * @cb_arg 1374 * opaque callback parameter 1375 */ 1376 void 1377 mlx5_intr_callback_unregister(const struct rte_intr_handle *handle, 1378 rte_intr_callback_fn cb_fn, void *cb_arg) 1379 { 1380 /* 1381 * Try to reduce timeout management overhead by not calling 1382 * the timer related routines on the first iteration. If the 1383 * unregistering succeeds on first call there will be no 1384 * timer calls at all. 1385 */ 1386 uint64_t twait = 0; 1387 uint64_t start = 0; 1388 1389 do { 1390 int ret; 1391 1392 ret = rte_intr_callback_unregister(handle, cb_fn, cb_arg); 1393 if (ret >= 0) 1394 return; 1395 if (ret != -EAGAIN) { 1396 DRV_LOG(INFO, "failed to unregister interrupt" 1397 " handler (error: %d)", ret); 1398 assert(false); 1399 return; 1400 } 1401 if (twait) { 1402 struct timespec onems; 1403 1404 /* Wait one millisecond and try again. */ 1405 onems.tv_sec = 0; 1406 onems.tv_nsec = NS_PER_S / MS_PER_S; 1407 nanosleep(&onems, 0); 1408 /* Check whether one second elapsed. */ 1409 if ((rte_get_timer_cycles() - start) <= twait) 1410 continue; 1411 } else { 1412 /* 1413 * We get the amount of timer ticks for one second. 1414 * If this amount elapsed it means we spent one 1415 * second in waiting. This branch is executed once 1416 * on first iteration. 1417 */ 1418 twait = rte_get_timer_hz(); 1419 assert(twait); 1420 } 1421 /* 1422 * Timeout elapsed, show message (once a second) and retry. 1423 * We have no other acceptable option here, if we ignore 1424 * the unregistering return code the handler will not 1425 * be unregistered, fd will be closed and we may get the 1426 * crush. Hanging and messaging in the loop seems not to be 1427 * the worst choice. 1428 */ 1429 DRV_LOG(INFO, "Retrying to unregister interrupt handler"); 1430 start = rte_get_timer_cycles(); 1431 } while (true); 1432 } 1433 1434 /** 1435 * Uninstall shared asynchronous device events handler. 1436 * This function is implemented to support event sharing 1437 * between multiple ports of single IB device. 1438 * 1439 * @param dev 1440 * Pointer to Ethernet device. 1441 */ 1442 static void 1443 mlx5_dev_shared_handler_uninstall(struct rte_eth_dev *dev) 1444 { 1445 struct mlx5_priv *priv = dev->data->dev_private; 1446 struct mlx5_ibv_shared *sh = priv->sh; 1447 1448 if (rte_eal_process_type() != RTE_PROC_PRIMARY) 1449 return; 1450 pthread_mutex_lock(&sh->intr_mutex); 1451 assert(priv->ibv_port); 1452 assert(priv->ibv_port <= sh->max_port); 1453 assert(dev->data->port_id < RTE_MAX_ETHPORTS); 1454 if (sh->port[priv->ibv_port - 1].ih_port_id >= RTE_MAX_ETHPORTS) 1455 goto exit; 1456 assert(sh->port[priv->ibv_port - 1].ih_port_id == 1457 (uint32_t)dev->data->port_id); 1458 assert(sh->intr_cnt); 1459 sh->port[priv->ibv_port - 1].ih_port_id = RTE_MAX_ETHPORTS; 1460 if (!sh->intr_cnt || --sh->intr_cnt) 1461 goto exit; 1462 mlx5_intr_callback_unregister(&sh->intr_handle, 1463 mlx5_dev_interrupt_handler, sh); 1464 sh->intr_handle.fd = 0; 1465 sh->intr_handle.type = RTE_INTR_HANDLE_UNKNOWN; 1466 exit: 1467 pthread_mutex_unlock(&sh->intr_mutex); 1468 } 1469 1470 /** 1471 * Install shared asynchronous device events handler. 1472 * This function is implemented to support event sharing 1473 * between multiple ports of single IB device. 1474 * 1475 * @param dev 1476 * Pointer to Ethernet device. 1477 */ 1478 static void 1479 mlx5_dev_shared_handler_install(struct rte_eth_dev *dev) 1480 { 1481 struct mlx5_priv *priv = dev->data->dev_private; 1482 struct mlx5_ibv_shared *sh = priv->sh; 1483 int ret; 1484 int flags; 1485 1486 if (rte_eal_process_type() != RTE_PROC_PRIMARY) 1487 return; 1488 pthread_mutex_lock(&sh->intr_mutex); 1489 assert(priv->ibv_port); 1490 assert(priv->ibv_port <= sh->max_port); 1491 assert(dev->data->port_id < RTE_MAX_ETHPORTS); 1492 if (sh->port[priv->ibv_port - 1].ih_port_id < RTE_MAX_ETHPORTS) { 1493 /* The handler is already installed for this port. */ 1494 assert(sh->intr_cnt); 1495 goto exit; 1496 } 1497 sh->port[priv->ibv_port - 1].ih_port_id = (uint32_t)dev->data->port_id; 1498 if (sh->intr_cnt) { 1499 sh->intr_cnt++; 1500 goto exit; 1501 } 1502 /* No shared handler installed. */ 1503 assert(sh->ctx->async_fd > 0); 1504 flags = fcntl(sh->ctx->async_fd, F_GETFL); 1505 ret = fcntl(sh->ctx->async_fd, F_SETFL, flags | O_NONBLOCK); 1506 if (ret) { 1507 DRV_LOG(INFO, "failed to change file descriptor" 1508 " async event queue"); 1509 /* Indicate there will be no interrupts. */ 1510 dev->data->dev_conf.intr_conf.lsc = 0; 1511 dev->data->dev_conf.intr_conf.rmv = 0; 1512 sh->port[priv->ibv_port - 1].ih_port_id = RTE_MAX_ETHPORTS; 1513 goto exit; 1514 } 1515 sh->intr_handle.fd = sh->ctx->async_fd; 1516 sh->intr_handle.type = RTE_INTR_HANDLE_EXT; 1517 rte_intr_callback_register(&sh->intr_handle, 1518 mlx5_dev_interrupt_handler, sh); 1519 sh->intr_cnt++; 1520 exit: 1521 pthread_mutex_unlock(&sh->intr_mutex); 1522 } 1523 1524 /** 1525 * Uninstall interrupt handler. 1526 * 1527 * @param dev 1528 * Pointer to Ethernet device. 1529 */ 1530 void 1531 mlx5_dev_interrupt_handler_uninstall(struct rte_eth_dev *dev) 1532 { 1533 mlx5_dev_shared_handler_uninstall(dev); 1534 } 1535 1536 /** 1537 * Install interrupt handler. 1538 * 1539 * @param dev 1540 * Pointer to Ethernet device. 1541 */ 1542 void 1543 mlx5_dev_interrupt_handler_install(struct rte_eth_dev *dev) 1544 { 1545 mlx5_dev_shared_handler_install(dev); 1546 } 1547 1548 /** 1549 * DPDK callback to bring the link DOWN. 1550 * 1551 * @param dev 1552 * Pointer to Ethernet device structure. 1553 * 1554 * @return 1555 * 0 on success, a negative errno value otherwise and rte_errno is set. 1556 */ 1557 int 1558 mlx5_set_link_down(struct rte_eth_dev *dev) 1559 { 1560 return mlx5_set_flags(dev, ~IFF_UP, ~IFF_UP); 1561 } 1562 1563 /** 1564 * DPDK callback to bring the link UP. 1565 * 1566 * @param dev 1567 * Pointer to Ethernet device structure. 1568 * 1569 * @return 1570 * 0 on success, a negative errno value otherwise and rte_errno is set. 1571 */ 1572 int 1573 mlx5_set_link_up(struct rte_eth_dev *dev) 1574 { 1575 return mlx5_set_flags(dev, ~IFF_UP, IFF_UP); 1576 } 1577 1578 /** 1579 * Configure the TX function to use. 1580 * 1581 * @param dev 1582 * Pointer to private data structure. 1583 * 1584 * @return 1585 * Pointer to selected Tx burst function. 1586 */ 1587 eth_tx_burst_t 1588 mlx5_select_tx_function(struct rte_eth_dev *dev) 1589 { 1590 struct mlx5_priv *priv = dev->data->dev_private; 1591 eth_tx_burst_t tx_pkt_burst = mlx5_tx_burst; 1592 struct mlx5_dev_config *config = &priv->config; 1593 uint64_t tx_offloads = dev->data->dev_conf.txmode.offloads; 1594 int tso = !!(tx_offloads & (DEV_TX_OFFLOAD_TCP_TSO | 1595 DEV_TX_OFFLOAD_VXLAN_TNL_TSO | 1596 DEV_TX_OFFLOAD_GRE_TNL_TSO | 1597 DEV_TX_OFFLOAD_IP_TNL_TSO | 1598 DEV_TX_OFFLOAD_UDP_TNL_TSO)); 1599 int swp = !!(tx_offloads & (DEV_TX_OFFLOAD_IP_TNL_TSO | 1600 DEV_TX_OFFLOAD_UDP_TNL_TSO | 1601 DEV_TX_OFFLOAD_OUTER_IPV4_CKSUM)); 1602 int vlan_insert = !!(tx_offloads & DEV_TX_OFFLOAD_VLAN_INSERT); 1603 1604 assert(priv != NULL); 1605 /* Select appropriate TX function. */ 1606 if (vlan_insert || tso || swp) 1607 return tx_pkt_burst; 1608 if (config->mps == MLX5_MPW_ENHANCED) { 1609 if (mlx5_check_vec_tx_support(dev) > 0) { 1610 if (mlx5_check_raw_vec_tx_support(dev) > 0) 1611 tx_pkt_burst = mlx5_tx_burst_raw_vec; 1612 else 1613 tx_pkt_burst = mlx5_tx_burst_vec; 1614 DRV_LOG(DEBUG, 1615 "port %u selected enhanced MPW Tx vectorized" 1616 " function", 1617 dev->data->port_id); 1618 } else { 1619 tx_pkt_burst = mlx5_tx_burst_empw; 1620 DRV_LOG(DEBUG, 1621 "port %u selected enhanced MPW Tx function", 1622 dev->data->port_id); 1623 } 1624 } else if (config->mps && (config->txq_inline > 0)) { 1625 tx_pkt_burst = mlx5_tx_burst_mpw_inline; 1626 DRV_LOG(DEBUG, "port %u selected MPW inline Tx function", 1627 dev->data->port_id); 1628 } else if (config->mps) { 1629 tx_pkt_burst = mlx5_tx_burst_mpw; 1630 DRV_LOG(DEBUG, "port %u selected MPW Tx function", 1631 dev->data->port_id); 1632 } 1633 return tx_pkt_burst; 1634 } 1635 1636 /** 1637 * Configure the RX function to use. 1638 * 1639 * @param dev 1640 * Pointer to private data structure. 1641 * 1642 * @return 1643 * Pointer to selected Rx burst function. 1644 */ 1645 eth_rx_burst_t 1646 mlx5_select_rx_function(struct rte_eth_dev *dev) 1647 { 1648 eth_rx_burst_t rx_pkt_burst = mlx5_rx_burst; 1649 1650 assert(dev != NULL); 1651 if (mlx5_check_vec_rx_support(dev) > 0) { 1652 rx_pkt_burst = mlx5_rx_burst_vec; 1653 DRV_LOG(DEBUG, "port %u selected Rx vectorized function", 1654 dev->data->port_id); 1655 } else if (mlx5_mprq_enabled(dev)) { 1656 rx_pkt_burst = mlx5_rx_burst_mprq; 1657 } 1658 return rx_pkt_burst; 1659 } 1660 1661 /** 1662 * Check if mlx5 device was removed. 1663 * 1664 * @param dev 1665 * Pointer to Ethernet device structure. 1666 * 1667 * @return 1668 * 1 when device is removed, otherwise 0. 1669 */ 1670 int 1671 mlx5_is_removed(struct rte_eth_dev *dev) 1672 { 1673 struct ibv_device_attr device_attr; 1674 struct mlx5_priv *priv = dev->data->dev_private; 1675 1676 if (mlx5_glue->query_device(priv->sh->ctx, &device_attr) == EIO) 1677 return 1; 1678 return 0; 1679 } 1680 1681 /** 1682 * Get port ID list of mlx5 instances sharing a common device. 1683 * 1684 * @param[in] dev 1685 * Device to look for. 1686 * @param[out] port_list 1687 * Result buffer for collected port IDs. 1688 * @param port_list_n 1689 * Maximum number of entries in result buffer. If 0, @p port_list can be 1690 * NULL. 1691 * 1692 * @return 1693 * Number of matching instances regardless of the @p port_list_n 1694 * parameter, 0 if none were found. 1695 */ 1696 unsigned int 1697 mlx5_dev_to_port_id(const struct rte_device *dev, uint16_t *port_list, 1698 unsigned int port_list_n) 1699 { 1700 uint16_t id; 1701 unsigned int n = 0; 1702 1703 RTE_ETH_FOREACH_DEV_OF(id, dev) { 1704 if (n < port_list_n) 1705 port_list[n] = id; 1706 n++; 1707 } 1708 return n; 1709 } 1710 1711 /** 1712 * Get the E-Switch domain id this port belongs to. 1713 * 1714 * @param[in] port 1715 * Device port id. 1716 * @param[out] es_domain_id 1717 * E-Switch domain id. 1718 * @param[out] es_port_id 1719 * The port id of the port in the E-Switch. 1720 * 1721 * @return 1722 * 0 on success, a negative errno value otherwise and rte_errno is set. 1723 */ 1724 int 1725 mlx5_port_to_eswitch_info(uint16_t port, 1726 uint16_t *es_domain_id, uint16_t *es_port_id) 1727 { 1728 struct rte_eth_dev *dev; 1729 struct mlx5_priv *priv; 1730 1731 if (port >= RTE_MAX_ETHPORTS) { 1732 rte_errno = EINVAL; 1733 return -rte_errno; 1734 } 1735 if (!rte_eth_dev_is_valid_port(port)) { 1736 rte_errno = ENODEV; 1737 return -rte_errno; 1738 } 1739 dev = &rte_eth_devices[port]; 1740 priv = dev->data->dev_private; 1741 if (!(priv->representor || priv->master)) { 1742 rte_errno = EINVAL; 1743 return -rte_errno; 1744 } 1745 if (es_domain_id) 1746 *es_domain_id = priv->domain_id; 1747 if (es_port_id) 1748 *es_port_id = priv->vport_id; 1749 return 0; 1750 } 1751 1752 /** 1753 * Get switch information associated with network interface. 1754 * 1755 * @param ifindex 1756 * Network interface index. 1757 * @param[out] info 1758 * Switch information object, populated in case of success. 1759 * 1760 * @return 1761 * 0 on success, a negative errno value otherwise and rte_errno is set. 1762 */ 1763 int 1764 mlx5_sysfs_switch_info(unsigned int ifindex, struct mlx5_switch_info *info) 1765 { 1766 char ifname[IF_NAMESIZE]; 1767 char port_name[IF_NAMESIZE]; 1768 FILE *file; 1769 struct mlx5_switch_info data = { 1770 .master = 0, 1771 .representor = 0, 1772 .name_type = MLX5_PHYS_PORT_NAME_TYPE_NOTSET, 1773 .port_name = 0, 1774 .switch_id = 0, 1775 }; 1776 DIR *dir; 1777 bool port_switch_id_set = false; 1778 bool device_dir = false; 1779 char c; 1780 int ret; 1781 1782 if (!if_indextoname(ifindex, ifname)) { 1783 rte_errno = errno; 1784 return -rte_errno; 1785 } 1786 1787 MKSTR(phys_port_name, "/sys/class/net/%s/phys_port_name", 1788 ifname); 1789 MKSTR(phys_switch_id, "/sys/class/net/%s/phys_switch_id", 1790 ifname); 1791 MKSTR(pci_device, "/sys/class/net/%s/device", 1792 ifname); 1793 1794 file = fopen(phys_port_name, "rb"); 1795 if (file != NULL) { 1796 ret = fscanf(file, "%s", port_name); 1797 fclose(file); 1798 if (ret == 1) 1799 mlx5_translate_port_name(port_name, &data); 1800 } 1801 file = fopen(phys_switch_id, "rb"); 1802 if (file == NULL) { 1803 rte_errno = errno; 1804 return -rte_errno; 1805 } 1806 port_switch_id_set = 1807 fscanf(file, "%" SCNx64 "%c", &data.switch_id, &c) == 2 && 1808 c == '\n'; 1809 fclose(file); 1810 dir = opendir(pci_device); 1811 if (dir != NULL) { 1812 closedir(dir); 1813 device_dir = true; 1814 } 1815 if (port_switch_id_set) { 1816 /* We have some E-Switch configuration. */ 1817 mlx5_sysfs_check_switch_info(device_dir, &data); 1818 } 1819 *info = data; 1820 assert(!(data.master && data.representor)); 1821 if (data.master && data.representor) { 1822 DRV_LOG(ERR, "ifindex %u device is recognized as master" 1823 " and as representor", ifindex); 1824 rte_errno = ENODEV; 1825 return -rte_errno; 1826 } 1827 return 0; 1828 } 1829 1830 /** 1831 * Analyze gathered port parameters via Netlink to recognize master 1832 * and representor devices for E-Switch configuration. 1833 * 1834 * @param[in] num_vf_set 1835 * flag of presence of number of VFs port attribute. 1836 * @param[inout] switch_info 1837 * Port information, including port name as a number and port name 1838 * type if recognized 1839 * 1840 * @return 1841 * master and representor flags are set in switch_info according to 1842 * recognized parameters (if any). 1843 */ 1844 void 1845 mlx5_nl_check_switch_info(bool num_vf_set, 1846 struct mlx5_switch_info *switch_info) 1847 { 1848 switch (switch_info->name_type) { 1849 case MLX5_PHYS_PORT_NAME_TYPE_UNKNOWN: 1850 /* 1851 * Name is not recognized, assume the master, 1852 * check the number of VFs key presence. 1853 */ 1854 switch_info->master = num_vf_set; 1855 break; 1856 case MLX5_PHYS_PORT_NAME_TYPE_NOTSET: 1857 /* 1858 * Name is not set, this assumes the legacy naming 1859 * schema for master, just check if there is a 1860 * number of VFs key. 1861 */ 1862 switch_info->master = num_vf_set; 1863 break; 1864 case MLX5_PHYS_PORT_NAME_TYPE_UPLINK: 1865 /* New uplink naming schema recognized. */ 1866 switch_info->master = 1; 1867 break; 1868 case MLX5_PHYS_PORT_NAME_TYPE_LEGACY: 1869 /* Legacy representors naming schema. */ 1870 switch_info->representor = !num_vf_set; 1871 break; 1872 case MLX5_PHYS_PORT_NAME_TYPE_PFVF: 1873 /* New representors naming schema. */ 1874 switch_info->representor = 1; 1875 break; 1876 } 1877 } 1878 1879 /** 1880 * Analyze gathered port parameters via sysfs to recognize master 1881 * and representor devices for E-Switch configuration. 1882 * 1883 * @param[in] device_dir 1884 * flag of presence of "device" directory under port device key. 1885 * @param[inout] switch_info 1886 * Port information, including port name as a number and port name 1887 * type if recognized 1888 * 1889 * @return 1890 * master and representor flags are set in switch_info according to 1891 * recognized parameters (if any). 1892 */ 1893 void 1894 mlx5_sysfs_check_switch_info(bool device_dir, 1895 struct mlx5_switch_info *switch_info) 1896 { 1897 switch (switch_info->name_type) { 1898 case MLX5_PHYS_PORT_NAME_TYPE_UNKNOWN: 1899 /* 1900 * Name is not recognized, assume the master, 1901 * check the device directory presence. 1902 */ 1903 switch_info->master = device_dir; 1904 break; 1905 case MLX5_PHYS_PORT_NAME_TYPE_NOTSET: 1906 /* 1907 * Name is not set, this assumes the legacy naming 1908 * schema for master, just check if there is 1909 * a device directory. 1910 */ 1911 switch_info->master = device_dir; 1912 break; 1913 case MLX5_PHYS_PORT_NAME_TYPE_UPLINK: 1914 /* New uplink naming schema recognized. */ 1915 switch_info->master = 1; 1916 break; 1917 case MLX5_PHYS_PORT_NAME_TYPE_LEGACY: 1918 /* Legacy representors naming schema. */ 1919 switch_info->representor = !device_dir; 1920 break; 1921 case MLX5_PHYS_PORT_NAME_TYPE_PFVF: 1922 /* New representors naming schema. */ 1923 switch_info->representor = 1; 1924 break; 1925 } 1926 } 1927 1928 /** 1929 * Extract port name, as a number, from sysfs or netlink information. 1930 * 1931 * @param[in] port_name_in 1932 * String representing the port name. 1933 * @param[out] port_info_out 1934 * Port information, including port name as a number and port name 1935 * type if recognized 1936 * 1937 * @return 1938 * port_name field set according to recognized name format. 1939 */ 1940 void 1941 mlx5_translate_port_name(const char *port_name_in, 1942 struct mlx5_switch_info *port_info_out) 1943 { 1944 char pf_c1, pf_c2, vf_c1, vf_c2; 1945 char *end; 1946 int sc_items; 1947 1948 /* 1949 * Check for port-name as a string of the form pf0vf0 1950 * (support kernel ver >= 5.0 or OFED ver >= 4.6). 1951 */ 1952 sc_items = sscanf(port_name_in, "%c%c%d%c%c%d", 1953 &pf_c1, &pf_c2, &port_info_out->pf_num, 1954 &vf_c1, &vf_c2, &port_info_out->port_name); 1955 if (sc_items == 6 && 1956 pf_c1 == 'p' && pf_c2 == 'f' && 1957 vf_c1 == 'v' && vf_c2 == 'f') { 1958 port_info_out->name_type = MLX5_PHYS_PORT_NAME_TYPE_PFVF; 1959 return; 1960 } 1961 /* 1962 * Check for port-name as a string of the form p0 1963 * (support kernel ver >= 5.0, or OFED ver >= 4.6). 1964 */ 1965 sc_items = sscanf(port_name_in, "%c%d", 1966 &pf_c1, &port_info_out->port_name); 1967 if (sc_items == 2 && pf_c1 == 'p') { 1968 port_info_out->name_type = MLX5_PHYS_PORT_NAME_TYPE_UPLINK; 1969 return; 1970 } 1971 /* Check for port-name as a number (support kernel ver < 5.0 */ 1972 errno = 0; 1973 port_info_out->port_name = strtol(port_name_in, &end, 0); 1974 if (!errno && 1975 (size_t)(end - port_name_in) == strlen(port_name_in)) { 1976 port_info_out->name_type = MLX5_PHYS_PORT_NAME_TYPE_LEGACY; 1977 return; 1978 } 1979 port_info_out->name_type = MLX5_PHYS_PORT_NAME_TYPE_UNKNOWN; 1980 return; 1981 } 1982