1 /*- 2 * BSD LICENSE 3 * 4 * Copyright 2015 6WIND S.A. 5 * Copyright 2015 Mellanox. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * * Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * * Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * * Neither the name of 6WIND S.A. nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 25 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include <stddef.h> 35 #include <assert.h> 36 #include <unistd.h> 37 #include <stdint.h> 38 #include <stdio.h> 39 #include <string.h> 40 #include <stdlib.h> 41 #include <errno.h> 42 #include <dirent.h> 43 #include <net/if.h> 44 #include <sys/ioctl.h> 45 #include <sys/socket.h> 46 #include <sys/utsname.h> 47 #include <netinet/in.h> 48 #include <linux/ethtool.h> 49 #include <linux/sockios.h> 50 #include <linux/version.h> 51 #include <fcntl.h> 52 53 /* DPDK headers don't like -pedantic. */ 54 #ifdef PEDANTIC 55 #pragma GCC diagnostic ignored "-Wpedantic" 56 #endif 57 #include <rte_atomic.h> 58 #include <rte_ethdev.h> 59 #include <rte_mbuf.h> 60 #include <rte_common.h> 61 #include <rte_interrupts.h> 62 #include <rte_alarm.h> 63 #include <rte_malloc.h> 64 #ifdef PEDANTIC 65 #pragma GCC diagnostic error "-Wpedantic" 66 #endif 67 68 #include "mlx5.h" 69 #include "mlx5_rxtx.h" 70 #include "mlx5_utils.h" 71 72 /* Add defines in case the running kernel is not the same as user headers. */ 73 #ifndef ETHTOOL_GLINKSETTINGS 74 struct ethtool_link_settings { 75 uint32_t cmd; 76 uint32_t speed; 77 uint8_t duplex; 78 uint8_t port; 79 uint8_t phy_address; 80 uint8_t autoneg; 81 uint8_t mdio_support; 82 uint8_t eth_to_mdix; 83 uint8_t eth_tp_mdix_ctrl; 84 int8_t link_mode_masks_nwords; 85 uint32_t reserved[8]; 86 uint32_t link_mode_masks[]; 87 }; 88 89 #define ETHTOOL_GLINKSETTINGS 0x0000004c 90 #define ETHTOOL_LINK_MODE_1000baseT_Full_BIT 5 91 #define ETHTOOL_LINK_MODE_Autoneg_BIT 6 92 #define ETHTOOL_LINK_MODE_1000baseKX_Full_BIT 17 93 #define ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT 18 94 #define ETHTOOL_LINK_MODE_10000baseKR_Full_BIT 19 95 #define ETHTOOL_LINK_MODE_10000baseR_FEC_BIT 20 96 #define ETHTOOL_LINK_MODE_20000baseMLD2_Full_BIT 21 97 #define ETHTOOL_LINK_MODE_20000baseKR2_Full_BIT 22 98 #define ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT 23 99 #define ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT 24 100 #define ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT 25 101 #define ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT 26 102 #define ETHTOOL_LINK_MODE_56000baseKR4_Full_BIT 27 103 #define ETHTOOL_LINK_MODE_56000baseCR4_Full_BIT 28 104 #define ETHTOOL_LINK_MODE_56000baseSR4_Full_BIT 29 105 #define ETHTOOL_LINK_MODE_56000baseLR4_Full_BIT 30 106 #endif 107 #ifndef HAVE_ETHTOOL_LINK_MODE_25G 108 #define ETHTOOL_LINK_MODE_25000baseCR_Full_BIT 31 109 #define ETHTOOL_LINK_MODE_25000baseKR_Full_BIT 32 110 #define ETHTOOL_LINK_MODE_25000baseSR_Full_BIT 33 111 #endif 112 #ifndef HAVE_ETHTOOL_LINK_MODE_50G 113 #define ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT 34 114 #define ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT 35 115 #endif 116 #ifndef HAVE_ETHTOOL_LINK_MODE_100G 117 #define ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT 36 118 #define ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT 37 119 #define ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT 38 120 #define ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT 39 121 #endif 122 123 /** 124 * Return private structure associated with an Ethernet device. 125 * 126 * @param dev 127 * Pointer to Ethernet device structure. 128 * 129 * @return 130 * Pointer to private structure. 131 */ 132 struct priv * 133 mlx5_get_priv(struct rte_eth_dev *dev) 134 { 135 struct mlx5_secondary_data *sd; 136 137 if (!mlx5_is_secondary()) 138 return dev->data->dev_private; 139 sd = &mlx5_secondary_data[dev->data->port_id]; 140 return sd->data.dev_private; 141 } 142 143 /** 144 * Check if running as a secondary process. 145 * 146 * @return 147 * Nonzero if running as a secondary process. 148 */ 149 inline int 150 mlx5_is_secondary(void) 151 { 152 return rte_eal_process_type() != RTE_PROC_PRIMARY; 153 } 154 155 /** 156 * Get interface name from private structure. 157 * 158 * @param[in] priv 159 * Pointer to private structure. 160 * @param[out] ifname 161 * Interface name output buffer. 162 * 163 * @return 164 * 0 on success, -1 on failure and errno is set. 165 */ 166 int 167 priv_get_ifname(const struct priv *priv, char (*ifname)[IF_NAMESIZE]) 168 { 169 DIR *dir; 170 struct dirent *dent; 171 unsigned int dev_type = 0; 172 unsigned int dev_port_prev = ~0u; 173 char match[IF_NAMESIZE] = ""; 174 175 { 176 MKSTR(path, "%s/device/net", priv->ctx->device->ibdev_path); 177 178 dir = opendir(path); 179 if (dir == NULL) 180 return -1; 181 } 182 while ((dent = readdir(dir)) != NULL) { 183 char *name = dent->d_name; 184 FILE *file; 185 unsigned int dev_port; 186 int r; 187 188 if ((name[0] == '.') && 189 ((name[1] == '\0') || 190 ((name[1] == '.') && (name[2] == '\0')))) 191 continue; 192 193 MKSTR(path, "%s/device/net/%s/%s", 194 priv->ctx->device->ibdev_path, name, 195 (dev_type ? "dev_id" : "dev_port")); 196 197 file = fopen(path, "rb"); 198 if (file == NULL) { 199 if (errno != ENOENT) 200 continue; 201 /* 202 * Switch to dev_id when dev_port does not exist as 203 * is the case with Linux kernel versions < 3.15. 204 */ 205 try_dev_id: 206 match[0] = '\0'; 207 if (dev_type) 208 break; 209 dev_type = 1; 210 dev_port_prev = ~0u; 211 rewinddir(dir); 212 continue; 213 } 214 r = fscanf(file, (dev_type ? "%x" : "%u"), &dev_port); 215 fclose(file); 216 if (r != 1) 217 continue; 218 /* 219 * Switch to dev_id when dev_port returns the same value for 220 * all ports. May happen when using a MOFED release older than 221 * 3.0 with a Linux kernel >= 3.15. 222 */ 223 if (dev_port == dev_port_prev) 224 goto try_dev_id; 225 dev_port_prev = dev_port; 226 if (dev_port == (priv->port - 1u)) 227 snprintf(match, sizeof(match), "%s", name); 228 } 229 closedir(dir); 230 if (match[0] == '\0') 231 return -1; 232 strncpy(*ifname, match, sizeof(*ifname)); 233 return 0; 234 } 235 236 /** 237 * Check if the counter is located on ib counters file. 238 * 239 * @param[in] cntr 240 * Counter name. 241 * 242 * @return 243 * 1 if counter is located on ib counters file , 0 otherwise. 244 */ 245 int 246 priv_is_ib_cntr(const char *cntr) 247 { 248 if (!strcmp(cntr, "out_of_buffer")) 249 return 1; 250 return 0; 251 } 252 253 /** 254 * Read from sysfs entry. 255 * 256 * @param[in] priv 257 * Pointer to private structure. 258 * @param[in] entry 259 * Entry name relative to sysfs path. 260 * @param[out] buf 261 * Data output buffer. 262 * @param size 263 * Buffer size. 264 * 265 * @return 266 * 0 on success, -1 on failure and errno is set. 267 */ 268 static int 269 priv_sysfs_read(const struct priv *priv, const char *entry, 270 char *buf, size_t size) 271 { 272 char ifname[IF_NAMESIZE]; 273 FILE *file; 274 int ret; 275 int err; 276 277 if (priv_get_ifname(priv, &ifname)) 278 return -1; 279 280 if (priv_is_ib_cntr(entry)) { 281 MKSTR(path, "%s/ports/1/hw_counters/%s", 282 priv->ctx->device->ibdev_path, entry); 283 file = fopen(path, "rb"); 284 } else { 285 MKSTR(path, "%s/device/net/%s/%s", 286 priv->ctx->device->ibdev_path, ifname, entry); 287 file = fopen(path, "rb"); 288 } 289 if (file == NULL) 290 return -1; 291 ret = fread(buf, 1, size, file); 292 err = errno; 293 if (((size_t)ret < size) && (ferror(file))) 294 ret = -1; 295 else 296 ret = size; 297 fclose(file); 298 errno = err; 299 return ret; 300 } 301 302 /** 303 * Write to sysfs entry. 304 * 305 * @param[in] priv 306 * Pointer to private structure. 307 * @param[in] entry 308 * Entry name relative to sysfs path. 309 * @param[in] buf 310 * Data buffer. 311 * @param size 312 * Buffer size. 313 * 314 * @return 315 * 0 on success, -1 on failure and errno is set. 316 */ 317 static int 318 priv_sysfs_write(const struct priv *priv, const char *entry, 319 char *buf, size_t size) 320 { 321 char ifname[IF_NAMESIZE]; 322 FILE *file; 323 int ret; 324 int err; 325 326 if (priv_get_ifname(priv, &ifname)) 327 return -1; 328 329 MKSTR(path, "%s/device/net/%s/%s", priv->ctx->device->ibdev_path, 330 ifname, entry); 331 332 file = fopen(path, "wb"); 333 if (file == NULL) 334 return -1; 335 ret = fwrite(buf, 1, size, file); 336 err = errno; 337 if (((size_t)ret < size) || (ferror(file))) 338 ret = -1; 339 else 340 ret = size; 341 fclose(file); 342 errno = err; 343 return ret; 344 } 345 346 /** 347 * Get unsigned long sysfs property. 348 * 349 * @param priv 350 * Pointer to private structure. 351 * @param[in] name 352 * Entry name relative to sysfs path. 353 * @param[out] value 354 * Value output buffer. 355 * 356 * @return 357 * 0 on success, -1 on failure and errno is set. 358 */ 359 static int 360 priv_get_sysfs_ulong(struct priv *priv, const char *name, unsigned long *value) 361 { 362 int ret; 363 unsigned long value_ret; 364 char value_str[32]; 365 366 ret = priv_sysfs_read(priv, name, value_str, (sizeof(value_str) - 1)); 367 if (ret == -1) { 368 DEBUG("cannot read %s value from sysfs: %s", 369 name, strerror(errno)); 370 return -1; 371 } 372 value_str[ret] = '\0'; 373 errno = 0; 374 value_ret = strtoul(value_str, NULL, 0); 375 if (errno) { 376 DEBUG("invalid %s value `%s': %s", name, value_str, 377 strerror(errno)); 378 return -1; 379 } 380 *value = value_ret; 381 return 0; 382 } 383 384 /** 385 * Set unsigned long sysfs property. 386 * 387 * @param priv 388 * Pointer to private structure. 389 * @param[in] name 390 * Entry name relative to sysfs path. 391 * @param value 392 * Value to set. 393 * 394 * @return 395 * 0 on success, -1 on failure and errno is set. 396 */ 397 static int 398 priv_set_sysfs_ulong(struct priv *priv, const char *name, unsigned long value) 399 { 400 int ret; 401 MKSTR(value_str, "%lu", value); 402 403 ret = priv_sysfs_write(priv, name, value_str, (sizeof(value_str) - 1)); 404 if (ret == -1) { 405 DEBUG("cannot write %s `%s' (%lu) to sysfs: %s", 406 name, value_str, value, strerror(errno)); 407 return -1; 408 } 409 return 0; 410 } 411 412 /** 413 * Perform ifreq ioctl() on associated Ethernet device. 414 * 415 * @param[in] priv 416 * Pointer to private structure. 417 * @param req 418 * Request number to pass to ioctl(). 419 * @param[out] ifr 420 * Interface request structure output buffer. 421 * 422 * @return 423 * 0 on success, -1 on failure and errno is set. 424 */ 425 int 426 priv_ifreq(const struct priv *priv, int req, struct ifreq *ifr) 427 { 428 int sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP); 429 int ret = -1; 430 431 if (sock == -1) 432 return ret; 433 if (priv_get_ifname(priv, &ifr->ifr_name) == 0) 434 ret = ioctl(sock, req, ifr); 435 close(sock); 436 return ret; 437 } 438 439 /** 440 * Return the number of active VFs for the current device. 441 * 442 * @param[in] priv 443 * Pointer to private structure. 444 * @param[out] num_vfs 445 * Number of active VFs. 446 * 447 * @return 448 * 0 on success, -1 on failure and errno is set. 449 */ 450 int 451 priv_get_num_vfs(struct priv *priv, uint16_t *num_vfs) 452 { 453 /* The sysfs entry name depends on the operating system. */ 454 const char **name = (const char *[]){ 455 "device/sriov_numvfs", 456 "device/mlx5_num_vfs", 457 NULL, 458 }; 459 int ret; 460 461 do { 462 unsigned long ulong_num_vfs; 463 464 ret = priv_get_sysfs_ulong(priv, *name, &ulong_num_vfs); 465 if (!ret) 466 *num_vfs = ulong_num_vfs; 467 } while (*(++name) && ret); 468 return ret; 469 } 470 471 /** 472 * Get device MTU. 473 * 474 * @param priv 475 * Pointer to private structure. 476 * @param[out] mtu 477 * MTU value output buffer. 478 * 479 * @return 480 * 0 on success, -1 on failure and errno is set. 481 */ 482 int 483 priv_get_mtu(struct priv *priv, uint16_t *mtu) 484 { 485 unsigned long ulong_mtu; 486 487 if (priv_get_sysfs_ulong(priv, "mtu", &ulong_mtu) == -1) 488 return -1; 489 *mtu = ulong_mtu; 490 return 0; 491 } 492 493 /** 494 * Read device counter from sysfs. 495 * 496 * @param priv 497 * Pointer to private structure. 498 * @param name 499 * Counter name. 500 * @param[out] cntr 501 * Counter output buffer. 502 * 503 * @return 504 * 0 on success, -1 on failure and errno is set. 505 */ 506 int 507 priv_get_cntr_sysfs(struct priv *priv, const char *name, uint64_t *cntr) 508 { 509 unsigned long ulong_ctr; 510 511 if (priv_get_sysfs_ulong(priv, name, &ulong_ctr) == -1) 512 return -1; 513 *cntr = ulong_ctr; 514 return 0; 515 } 516 517 /** 518 * Set device MTU. 519 * 520 * @param priv 521 * Pointer to private structure. 522 * @param mtu 523 * MTU value to set. 524 * 525 * @return 526 * 0 on success, -1 on failure and errno is set. 527 */ 528 static int 529 priv_set_mtu(struct priv *priv, uint16_t mtu) 530 { 531 uint16_t new_mtu; 532 533 if (priv_set_sysfs_ulong(priv, "mtu", mtu) || 534 priv_get_mtu(priv, &new_mtu)) 535 return -1; 536 if (new_mtu == mtu) 537 return 0; 538 errno = EINVAL; 539 return -1; 540 } 541 542 /** 543 * Set device flags. 544 * 545 * @param priv 546 * Pointer to private structure. 547 * @param keep 548 * Bitmask for flags that must remain untouched. 549 * @param flags 550 * Bitmask for flags to modify. 551 * 552 * @return 553 * 0 on success, -1 on failure and errno is set. 554 */ 555 int 556 priv_set_flags(struct priv *priv, unsigned int keep, unsigned int flags) 557 { 558 unsigned long tmp; 559 560 if (priv_get_sysfs_ulong(priv, "flags", &tmp) == -1) 561 return -1; 562 tmp &= keep; 563 tmp |= (flags & (~keep)); 564 return priv_set_sysfs_ulong(priv, "flags", tmp); 565 } 566 567 /** 568 * Ethernet device configuration. 569 * 570 * Prepare the driver for a given number of TX and RX queues. 571 * 572 * @param dev 573 * Pointer to Ethernet device structure. 574 * 575 * @return 576 * 0 on success, errno value on failure. 577 */ 578 static int 579 dev_configure(struct rte_eth_dev *dev) 580 { 581 struct priv *priv = dev->data->dev_private; 582 unsigned int rxqs_n = dev->data->nb_rx_queues; 583 unsigned int txqs_n = dev->data->nb_tx_queues; 584 unsigned int i; 585 unsigned int j; 586 unsigned int reta_idx_n; 587 588 priv->rss_hf = dev->data->dev_conf.rx_adv_conf.rss_conf.rss_hf; 589 priv->rxqs = (void *)dev->data->rx_queues; 590 priv->txqs = (void *)dev->data->tx_queues; 591 if (txqs_n != priv->txqs_n) { 592 INFO("%p: TX queues number update: %u -> %u", 593 (void *)dev, priv->txqs_n, txqs_n); 594 priv->txqs_n = txqs_n; 595 } 596 if (rxqs_n > priv->ind_table_max_size) { 597 ERROR("cannot handle this many RX queues (%u)", rxqs_n); 598 return EINVAL; 599 } 600 if (rxqs_n == priv->rxqs_n) 601 return 0; 602 INFO("%p: RX queues number update: %u -> %u", 603 (void *)dev, priv->rxqs_n, rxqs_n); 604 priv->rxqs_n = rxqs_n; 605 /* If the requested number of RX queues is not a power of two, use the 606 * maximum indirection table size for better balancing. 607 * The result is always rounded to the next power of two. */ 608 reta_idx_n = (1 << log2above((rxqs_n & (rxqs_n - 1)) ? 609 priv->ind_table_max_size : 610 rxqs_n)); 611 if (priv_rss_reta_index_resize(priv, reta_idx_n)) 612 return ENOMEM; 613 /* When the number of RX queues is not a power of two, the remaining 614 * table entries are padded with reused WQs and hashes are not spread 615 * uniformly. */ 616 for (i = 0, j = 0; (i != reta_idx_n); ++i) { 617 (*priv->reta_idx)[i] = j; 618 if (++j == rxqs_n) 619 j = 0; 620 } 621 return 0; 622 } 623 624 /** 625 * DPDK callback for Ethernet device configuration. 626 * 627 * @param dev 628 * Pointer to Ethernet device structure. 629 * 630 * @return 631 * 0 on success, negative errno value on failure. 632 */ 633 int 634 mlx5_dev_configure(struct rte_eth_dev *dev) 635 { 636 struct priv *priv = dev->data->dev_private; 637 int ret; 638 639 if (mlx5_is_secondary()) 640 return -E_RTE_SECONDARY; 641 642 priv_lock(priv); 643 ret = dev_configure(dev); 644 assert(ret >= 0); 645 priv_unlock(priv); 646 return -ret; 647 } 648 649 /** 650 * DPDK callback to get information about the device. 651 * 652 * @param dev 653 * Pointer to Ethernet device structure. 654 * @param[out] info 655 * Info structure output buffer. 656 */ 657 void 658 mlx5_dev_infos_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *info) 659 { 660 struct priv *priv = mlx5_get_priv(dev); 661 unsigned int max; 662 char ifname[IF_NAMESIZE]; 663 664 info->pci_dev = RTE_ETH_DEV_TO_PCI(dev); 665 666 priv_lock(priv); 667 /* FIXME: we should ask the device for these values. */ 668 info->min_rx_bufsize = 32; 669 info->max_rx_pktlen = 65536; 670 /* 671 * Since we need one CQ per QP, the limit is the minimum number 672 * between the two values. 673 */ 674 max = ((priv->device_attr.max_cq > priv->device_attr.max_qp) ? 675 priv->device_attr.max_qp : priv->device_attr.max_cq); 676 /* If max >= 65535 then max = 0, max_rx_queues is uint16_t. */ 677 if (max >= 65535) 678 max = 65535; 679 info->max_rx_queues = max; 680 info->max_tx_queues = max; 681 info->max_mac_addrs = RTE_DIM(priv->mac); 682 info->rx_offload_capa = 683 (priv->hw_csum ? 684 (DEV_RX_OFFLOAD_IPV4_CKSUM | 685 DEV_RX_OFFLOAD_UDP_CKSUM | 686 DEV_RX_OFFLOAD_TCP_CKSUM) : 687 0) | 688 (priv->hw_vlan_strip ? DEV_RX_OFFLOAD_VLAN_STRIP : 0); 689 if (!priv->mps) 690 info->tx_offload_capa = DEV_TX_OFFLOAD_VLAN_INSERT; 691 if (priv->hw_csum) 692 info->tx_offload_capa |= 693 (DEV_TX_OFFLOAD_IPV4_CKSUM | 694 DEV_TX_OFFLOAD_UDP_CKSUM | 695 DEV_TX_OFFLOAD_TCP_CKSUM); 696 if (priv->tso) 697 info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO; 698 if (priv->tunnel_en) 699 info->tx_offload_capa |= (DEV_TX_OFFLOAD_OUTER_IPV4_CKSUM | 700 DEV_TX_OFFLOAD_VXLAN_TNL_TSO | 701 DEV_TX_OFFLOAD_GRE_TNL_TSO); 702 if (priv_get_ifname(priv, &ifname) == 0) 703 info->if_index = if_nametoindex(ifname); 704 info->reta_size = priv->reta_idx_n ? 705 priv->reta_idx_n : priv->ind_table_max_size; 706 info->hash_key_size = ((*priv->rss_conf) ? 707 (*priv->rss_conf)[0]->rss_key_len : 708 0); 709 info->speed_capa = priv->link_speed_capa; 710 priv_unlock(priv); 711 } 712 713 const uint32_t * 714 mlx5_dev_supported_ptypes_get(struct rte_eth_dev *dev) 715 { 716 static const uint32_t ptypes[] = { 717 /* refers to rxq_cq_to_pkt_type() */ 718 RTE_PTYPE_L3_IPV4_EXT_UNKNOWN, 719 RTE_PTYPE_L3_IPV6_EXT_UNKNOWN, 720 RTE_PTYPE_INNER_L3_IPV4_EXT_UNKNOWN, 721 RTE_PTYPE_INNER_L3_IPV6_EXT_UNKNOWN, 722 RTE_PTYPE_UNKNOWN 723 724 }; 725 726 if (dev->rx_pkt_burst == mlx5_rx_burst) 727 return ptypes; 728 return NULL; 729 } 730 731 /** 732 * DPDK callback to retrieve physical link information. 733 * 734 * @param dev 735 * Pointer to Ethernet device structure. 736 * @param wait_to_complete 737 * Wait for request completion (ignored). 738 */ 739 static int 740 mlx5_link_update_unlocked_gset(struct rte_eth_dev *dev, int wait_to_complete) 741 { 742 struct priv *priv = mlx5_get_priv(dev); 743 struct ethtool_cmd edata = { 744 .cmd = ETHTOOL_GSET /* Deprecated since Linux v4.5. */ 745 }; 746 struct ifreq ifr; 747 struct rte_eth_link dev_link; 748 int link_speed = 0; 749 750 /* priv_lock() is not taken to allow concurrent calls. */ 751 752 (void)wait_to_complete; 753 if (priv_ifreq(priv, SIOCGIFFLAGS, &ifr)) { 754 WARN("ioctl(SIOCGIFFLAGS) failed: %s", strerror(errno)); 755 return -1; 756 } 757 memset(&dev_link, 0, sizeof(dev_link)); 758 dev_link.link_status = ((ifr.ifr_flags & IFF_UP) && 759 (ifr.ifr_flags & IFF_RUNNING)); 760 ifr.ifr_data = (void *)&edata; 761 if (priv_ifreq(priv, SIOCETHTOOL, &ifr)) { 762 WARN("ioctl(SIOCETHTOOL, ETHTOOL_GSET) failed: %s", 763 strerror(errno)); 764 return -1; 765 } 766 link_speed = ethtool_cmd_speed(&edata); 767 if (link_speed == -1) 768 dev_link.link_speed = 0; 769 else 770 dev_link.link_speed = link_speed; 771 priv->link_speed_capa = 0; 772 if (edata.supported & SUPPORTED_Autoneg) 773 priv->link_speed_capa |= ETH_LINK_SPEED_AUTONEG; 774 if (edata.supported & (SUPPORTED_1000baseT_Full | 775 SUPPORTED_1000baseKX_Full)) 776 priv->link_speed_capa |= ETH_LINK_SPEED_1G; 777 if (edata.supported & SUPPORTED_10000baseKR_Full) 778 priv->link_speed_capa |= ETH_LINK_SPEED_10G; 779 if (edata.supported & (SUPPORTED_40000baseKR4_Full | 780 SUPPORTED_40000baseCR4_Full | 781 SUPPORTED_40000baseSR4_Full | 782 SUPPORTED_40000baseLR4_Full)) 783 priv->link_speed_capa |= ETH_LINK_SPEED_40G; 784 dev_link.link_duplex = ((edata.duplex == DUPLEX_HALF) ? 785 ETH_LINK_HALF_DUPLEX : ETH_LINK_FULL_DUPLEX); 786 dev_link.link_autoneg = !(dev->data->dev_conf.link_speeds & 787 ETH_LINK_SPEED_FIXED); 788 if (memcmp(&dev_link, &dev->data->dev_link, sizeof(dev_link))) { 789 /* Link status changed. */ 790 dev->data->dev_link = dev_link; 791 return 0; 792 } 793 /* Link status is still the same. */ 794 return -1; 795 } 796 797 /** 798 * Retrieve physical link information (unlocked version using new ioctl). 799 * 800 * @param dev 801 * Pointer to Ethernet device structure. 802 * @param wait_to_complete 803 * Wait for request completion (ignored). 804 */ 805 static int 806 mlx5_link_update_unlocked_gs(struct rte_eth_dev *dev, int wait_to_complete) 807 { 808 struct priv *priv = mlx5_get_priv(dev); 809 struct ethtool_link_settings edata = { 810 .cmd = ETHTOOL_GLINKSETTINGS, 811 }; 812 struct ifreq ifr; 813 struct rte_eth_link dev_link; 814 uint64_t sc; 815 816 (void)wait_to_complete; 817 if (priv_ifreq(priv, SIOCGIFFLAGS, &ifr)) { 818 WARN("ioctl(SIOCGIFFLAGS) failed: %s", strerror(errno)); 819 return -1; 820 } 821 memset(&dev_link, 0, sizeof(dev_link)); 822 dev_link.link_status = ((ifr.ifr_flags & IFF_UP) && 823 (ifr.ifr_flags & IFF_RUNNING)); 824 ifr.ifr_data = (void *)&edata; 825 if (priv_ifreq(priv, SIOCETHTOOL, &ifr)) { 826 DEBUG("ioctl(SIOCETHTOOL, ETHTOOL_GLINKSETTINGS) failed: %s", 827 strerror(errno)); 828 return -1; 829 } 830 dev_link.link_speed = edata.speed; 831 sc = edata.link_mode_masks[0] | 832 ((uint64_t)edata.link_mode_masks[1] << 32); 833 priv->link_speed_capa = 0; 834 if (sc & ETHTOOL_LINK_MODE_Autoneg_BIT) 835 priv->link_speed_capa |= ETH_LINK_SPEED_AUTONEG; 836 if (sc & (ETHTOOL_LINK_MODE_1000baseT_Full_BIT | 837 ETHTOOL_LINK_MODE_1000baseKX_Full_BIT)) 838 priv->link_speed_capa |= ETH_LINK_SPEED_1G; 839 if (sc & (ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT | 840 ETHTOOL_LINK_MODE_10000baseKR_Full_BIT | 841 ETHTOOL_LINK_MODE_10000baseR_FEC_BIT)) 842 priv->link_speed_capa |= ETH_LINK_SPEED_10G; 843 if (sc & (ETHTOOL_LINK_MODE_20000baseMLD2_Full_BIT | 844 ETHTOOL_LINK_MODE_20000baseKR2_Full_BIT)) 845 priv->link_speed_capa |= ETH_LINK_SPEED_20G; 846 if (sc & (ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT | 847 ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT | 848 ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT | 849 ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT)) 850 priv->link_speed_capa |= ETH_LINK_SPEED_40G; 851 if (sc & (ETHTOOL_LINK_MODE_56000baseKR4_Full_BIT | 852 ETHTOOL_LINK_MODE_56000baseCR4_Full_BIT | 853 ETHTOOL_LINK_MODE_56000baseSR4_Full_BIT | 854 ETHTOOL_LINK_MODE_56000baseLR4_Full_BIT)) 855 priv->link_speed_capa |= ETH_LINK_SPEED_56G; 856 if (sc & (ETHTOOL_LINK_MODE_25000baseCR_Full_BIT | 857 ETHTOOL_LINK_MODE_25000baseKR_Full_BIT | 858 ETHTOOL_LINK_MODE_25000baseSR_Full_BIT)) 859 priv->link_speed_capa |= ETH_LINK_SPEED_25G; 860 if (sc & (ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT | 861 ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT)) 862 priv->link_speed_capa |= ETH_LINK_SPEED_50G; 863 if (sc & (ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT | 864 ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT | 865 ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT | 866 ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT)) 867 priv->link_speed_capa |= ETH_LINK_SPEED_100G; 868 dev_link.link_duplex = ((edata.duplex == DUPLEX_HALF) ? 869 ETH_LINK_HALF_DUPLEX : ETH_LINK_FULL_DUPLEX); 870 dev_link.link_autoneg = !(dev->data->dev_conf.link_speeds & 871 ETH_LINK_SPEED_FIXED); 872 if (memcmp(&dev_link, &dev->data->dev_link, sizeof(dev_link))) { 873 /* Link status changed. */ 874 dev->data->dev_link = dev_link; 875 return 0; 876 } 877 /* Link status is still the same. */ 878 return -1; 879 } 880 881 /** 882 * DPDK callback to retrieve physical link information. 883 * 884 * @param dev 885 * Pointer to Ethernet device structure. 886 * @param wait_to_complete 887 * Wait for request completion (ignored). 888 */ 889 int 890 mlx5_link_update(struct rte_eth_dev *dev, int wait_to_complete) 891 { 892 struct utsname utsname; 893 int ver[3]; 894 895 if (uname(&utsname) == -1 || 896 sscanf(utsname.release, "%d.%d.%d", 897 &ver[0], &ver[1], &ver[2]) != 3 || 898 KERNEL_VERSION(ver[0], ver[1], ver[2]) < KERNEL_VERSION(4, 9, 0)) 899 return mlx5_link_update_unlocked_gset(dev, wait_to_complete); 900 return mlx5_link_update_unlocked_gs(dev, wait_to_complete); 901 } 902 903 /** 904 * DPDK callback to change the MTU. 905 * 906 * Setting the MTU affects hardware MRU (packets larger than the MTU cannot be 907 * received). Use this as a hint to enable/disable scattered packets support 908 * and improve performance when not needed. 909 * Since failure is not an option, reconfiguring queues on the fly is not 910 * recommended. 911 * 912 * @param dev 913 * Pointer to Ethernet device structure. 914 * @param in_mtu 915 * New MTU. 916 * 917 * @return 918 * 0 on success, negative errno value on failure. 919 */ 920 int 921 mlx5_dev_set_mtu(struct rte_eth_dev *dev, uint16_t mtu) 922 { 923 struct priv *priv = dev->data->dev_private; 924 int ret = 0; 925 unsigned int i; 926 unsigned int max_frame_len; 927 int rehash; 928 int restart = priv->started; 929 930 if (mlx5_is_secondary()) 931 return -E_RTE_SECONDARY; 932 933 priv_lock(priv); 934 /* Set kernel interface MTU first. */ 935 if (priv_set_mtu(priv, mtu)) { 936 ret = errno; 937 WARN("cannot set port %u MTU to %u: %s", priv->port, mtu, 938 strerror(ret)); 939 goto out; 940 } else 941 DEBUG("adapter port %u MTU set to %u", priv->port, mtu); 942 /* Temporarily replace RX handler with a fake one, assuming it has not 943 * been copied elsewhere. */ 944 dev->rx_pkt_burst = removed_rx_burst; 945 /* Make sure everyone has left dev->rx_pkt_burst() and uses 946 * removed_rx_burst() instead. */ 947 rte_wmb(); 948 usleep(1000); 949 /* MTU does not include header and CRC. */ 950 max_frame_len = ETHER_HDR_LEN + mtu + ETHER_CRC_LEN; 951 /* Check if at least one queue is going to need a SGE update. */ 952 for (i = 0; i != priv->rxqs_n; ++i) { 953 struct rxq *rxq = (*priv->rxqs)[i]; 954 unsigned int mb_len; 955 unsigned int size = RTE_PKTMBUF_HEADROOM + max_frame_len; 956 unsigned int sges_n; 957 958 if (rxq == NULL) 959 continue; 960 mb_len = rte_pktmbuf_data_room_size(rxq->mp); 961 assert(mb_len >= RTE_PKTMBUF_HEADROOM); 962 /* 963 * Determine the number of SGEs needed for a full packet 964 * and round it to the next power of two. 965 */ 966 sges_n = log2above((size / mb_len) + !!(size % mb_len)); 967 if (sges_n != rxq->sges_n) 968 break; 969 } 970 /* 971 * If all queues have the right number of SGEs, a simple rehash 972 * of their buffers is enough, otherwise SGE information can only 973 * be updated in a queue by recreating it. All resources that depend 974 * on queues (flows, indirection tables) must be recreated as well in 975 * that case. 976 */ 977 rehash = (i == priv->rxqs_n); 978 if (!rehash) { 979 /* Clean up everything as with mlx5_dev_stop(). */ 980 priv_special_flow_disable_all(priv); 981 priv_mac_addrs_disable(priv); 982 priv_destroy_hash_rxqs(priv); 983 priv_fdir_disable(priv); 984 priv_dev_interrupt_handler_uninstall(priv, dev); 985 } 986 recover: 987 /* Reconfigure each RX queue. */ 988 for (i = 0; (i != priv->rxqs_n); ++i) { 989 struct rxq *rxq = (*priv->rxqs)[i]; 990 struct rxq_ctrl *rxq_ctrl = 991 container_of(rxq, struct rxq_ctrl, rxq); 992 unsigned int mb_len; 993 unsigned int tmp; 994 995 if (rxq == NULL) 996 continue; 997 mb_len = rte_pktmbuf_data_room_size(rxq->mp); 998 assert(mb_len >= RTE_PKTMBUF_HEADROOM); 999 /* Provide new values to rxq_setup(). */ 1000 dev->data->dev_conf.rxmode.jumbo_frame = 1001 (max_frame_len > ETHER_MAX_LEN); 1002 dev->data->dev_conf.rxmode.max_rx_pkt_len = max_frame_len; 1003 if (rehash) 1004 ret = rxq_rehash(dev, rxq_ctrl); 1005 else 1006 ret = rxq_ctrl_setup(dev, rxq_ctrl, 1 << rxq->elts_n, 1007 rxq_ctrl->socket, NULL, rxq->mp); 1008 if (!ret) 1009 continue; 1010 /* Attempt to roll back in case of error. */ 1011 tmp = (mb_len << rxq->sges_n) - RTE_PKTMBUF_HEADROOM; 1012 if (max_frame_len != tmp) { 1013 max_frame_len = tmp; 1014 goto recover; 1015 } 1016 /* Double fault, disable RX. */ 1017 break; 1018 } 1019 /* Mimic mlx5_dev_start(). */ 1020 if (ret) { 1021 ERROR("unable to reconfigure RX queues, RX disabled"); 1022 } else if (restart && 1023 !rehash && 1024 !priv_create_hash_rxqs(priv) && 1025 !priv_rehash_flows(priv)) { 1026 if (dev->data->dev_conf.fdir_conf.mode == RTE_FDIR_MODE_NONE) 1027 priv_fdir_enable(priv); 1028 priv_dev_interrupt_handler_install(priv, dev); 1029 } 1030 priv->mtu = mtu; 1031 /* Burst functions can now be called again. */ 1032 rte_wmb(); 1033 /* 1034 * Use a safe RX burst function in case of error, otherwise select RX 1035 * burst function again. 1036 */ 1037 if (!ret) 1038 priv_select_rx_function(priv); 1039 out: 1040 priv_unlock(priv); 1041 assert(ret >= 0); 1042 return -ret; 1043 } 1044 1045 /** 1046 * DPDK callback to get flow control status. 1047 * 1048 * @param dev 1049 * Pointer to Ethernet device structure. 1050 * @param[out] fc_conf 1051 * Flow control output buffer. 1052 * 1053 * @return 1054 * 0 on success, negative errno value on failure. 1055 */ 1056 int 1057 mlx5_dev_get_flow_ctrl(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf) 1058 { 1059 struct priv *priv = dev->data->dev_private; 1060 struct ifreq ifr; 1061 struct ethtool_pauseparam ethpause = { 1062 .cmd = ETHTOOL_GPAUSEPARAM 1063 }; 1064 int ret; 1065 1066 if (mlx5_is_secondary()) 1067 return -E_RTE_SECONDARY; 1068 1069 ifr.ifr_data = (void *)ðpause; 1070 priv_lock(priv); 1071 if (priv_ifreq(priv, SIOCETHTOOL, &ifr)) { 1072 ret = errno; 1073 WARN("ioctl(SIOCETHTOOL, ETHTOOL_GPAUSEPARAM)" 1074 " failed: %s", 1075 strerror(ret)); 1076 goto out; 1077 } 1078 1079 fc_conf->autoneg = ethpause.autoneg; 1080 if (ethpause.rx_pause && ethpause.tx_pause) 1081 fc_conf->mode = RTE_FC_FULL; 1082 else if (ethpause.rx_pause) 1083 fc_conf->mode = RTE_FC_RX_PAUSE; 1084 else if (ethpause.tx_pause) 1085 fc_conf->mode = RTE_FC_TX_PAUSE; 1086 else 1087 fc_conf->mode = RTE_FC_NONE; 1088 ret = 0; 1089 1090 out: 1091 priv_unlock(priv); 1092 assert(ret >= 0); 1093 return -ret; 1094 } 1095 1096 /** 1097 * DPDK callback to modify flow control parameters. 1098 * 1099 * @param dev 1100 * Pointer to Ethernet device structure. 1101 * @param[in] fc_conf 1102 * Flow control parameters. 1103 * 1104 * @return 1105 * 0 on success, negative errno value on failure. 1106 */ 1107 int 1108 mlx5_dev_set_flow_ctrl(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf) 1109 { 1110 struct priv *priv = dev->data->dev_private; 1111 struct ifreq ifr; 1112 struct ethtool_pauseparam ethpause = { 1113 .cmd = ETHTOOL_SPAUSEPARAM 1114 }; 1115 int ret; 1116 1117 if (mlx5_is_secondary()) 1118 return -E_RTE_SECONDARY; 1119 1120 ifr.ifr_data = (void *)ðpause; 1121 ethpause.autoneg = fc_conf->autoneg; 1122 if (((fc_conf->mode & RTE_FC_FULL) == RTE_FC_FULL) || 1123 (fc_conf->mode & RTE_FC_RX_PAUSE)) 1124 ethpause.rx_pause = 1; 1125 else 1126 ethpause.rx_pause = 0; 1127 1128 if (((fc_conf->mode & RTE_FC_FULL) == RTE_FC_FULL) || 1129 (fc_conf->mode & RTE_FC_TX_PAUSE)) 1130 ethpause.tx_pause = 1; 1131 else 1132 ethpause.tx_pause = 0; 1133 1134 priv_lock(priv); 1135 if (priv_ifreq(priv, SIOCETHTOOL, &ifr)) { 1136 ret = errno; 1137 WARN("ioctl(SIOCETHTOOL, ETHTOOL_SPAUSEPARAM)" 1138 " failed: %s", 1139 strerror(ret)); 1140 goto out; 1141 } 1142 ret = 0; 1143 1144 out: 1145 priv_unlock(priv); 1146 assert(ret >= 0); 1147 return -ret; 1148 } 1149 1150 /** 1151 * Get PCI information from struct ibv_device. 1152 * 1153 * @param device 1154 * Pointer to Ethernet device structure. 1155 * @param[out] pci_addr 1156 * PCI bus address output buffer. 1157 * 1158 * @return 1159 * 0 on success, -1 on failure and errno is set. 1160 */ 1161 int 1162 mlx5_ibv_device_to_pci_addr(const struct ibv_device *device, 1163 struct rte_pci_addr *pci_addr) 1164 { 1165 FILE *file; 1166 char line[32]; 1167 MKSTR(path, "%s/device/uevent", device->ibdev_path); 1168 1169 file = fopen(path, "rb"); 1170 if (file == NULL) 1171 return -1; 1172 while (fgets(line, sizeof(line), file) == line) { 1173 size_t len = strlen(line); 1174 int ret; 1175 1176 /* Truncate long lines. */ 1177 if (len == (sizeof(line) - 1)) 1178 while (line[(len - 1)] != '\n') { 1179 ret = fgetc(file); 1180 if (ret == EOF) 1181 break; 1182 line[(len - 1)] = ret; 1183 } 1184 /* Extract information. */ 1185 if (sscanf(line, 1186 "PCI_SLOT_NAME=" 1187 "%" SCNx32 ":%" SCNx8 ":%" SCNx8 ".%" SCNx8 "\n", 1188 &pci_addr->domain, 1189 &pci_addr->bus, 1190 &pci_addr->devid, 1191 &pci_addr->function) == 4) { 1192 ret = 0; 1193 break; 1194 } 1195 } 1196 fclose(file); 1197 return 0; 1198 } 1199 1200 /** 1201 * Link status handler. 1202 * 1203 * @param priv 1204 * Pointer to private structure. 1205 * @param dev 1206 * Pointer to the rte_eth_dev structure. 1207 * 1208 * @return 1209 * Nonzero if the callback process can be called immediately. 1210 */ 1211 static int 1212 priv_dev_link_status_handler(struct priv *priv, struct rte_eth_dev *dev) 1213 { 1214 struct ibv_async_event event; 1215 struct rte_eth_link *link = &dev->data->dev_link; 1216 int ret = 0; 1217 1218 /* Read all message and acknowledge them. */ 1219 for (;;) { 1220 if (ibv_get_async_event(priv->ctx, &event)) 1221 break; 1222 1223 if (event.event_type != IBV_EVENT_PORT_ACTIVE && 1224 event.event_type != IBV_EVENT_PORT_ERR) 1225 DEBUG("event type %d on port %d not handled", 1226 event.event_type, event.element.port_num); 1227 ibv_ack_async_event(&event); 1228 } 1229 mlx5_link_update(dev, 0); 1230 if (((link->link_speed == 0) && link->link_status) || 1231 ((link->link_speed != 0) && !link->link_status)) { 1232 if (!priv->pending_alarm) { 1233 /* Inconsistent status, check again later. */ 1234 priv->pending_alarm = 1; 1235 rte_eal_alarm_set(MLX5_ALARM_TIMEOUT_US, 1236 mlx5_dev_link_status_handler, 1237 dev); 1238 } 1239 } else { 1240 ret = 1; 1241 } 1242 return ret; 1243 } 1244 1245 /** 1246 * Handle delayed link status event. 1247 * 1248 * @param arg 1249 * Registered argument. 1250 */ 1251 void 1252 mlx5_dev_link_status_handler(void *arg) 1253 { 1254 struct rte_eth_dev *dev = arg; 1255 struct priv *priv = dev->data->dev_private; 1256 int ret; 1257 1258 priv_lock(priv); 1259 assert(priv->pending_alarm == 1); 1260 priv->pending_alarm = 0; 1261 ret = priv_dev_link_status_handler(priv, dev); 1262 priv_unlock(priv); 1263 if (ret) 1264 _rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL, 1265 NULL); 1266 } 1267 1268 /** 1269 * Handle interrupts from the NIC. 1270 * 1271 * @param[in] intr_handle 1272 * Interrupt handler. 1273 * @param cb_arg 1274 * Callback argument. 1275 */ 1276 void 1277 mlx5_dev_interrupt_handler(void *cb_arg) 1278 { 1279 struct rte_eth_dev *dev = cb_arg; 1280 struct priv *priv = dev->data->dev_private; 1281 int ret; 1282 1283 priv_lock(priv); 1284 ret = priv_dev_link_status_handler(priv, dev); 1285 priv_unlock(priv); 1286 if (ret) 1287 _rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL, 1288 NULL); 1289 } 1290 1291 /** 1292 * Uninstall interrupt handler. 1293 * 1294 * @param priv 1295 * Pointer to private structure. 1296 * @param dev 1297 * Pointer to the rte_eth_dev structure. 1298 */ 1299 void 1300 priv_dev_interrupt_handler_uninstall(struct priv *priv, struct rte_eth_dev *dev) 1301 { 1302 if (!dev->data->dev_conf.intr_conf.lsc) 1303 return; 1304 rte_intr_callback_unregister(&priv->intr_handle, 1305 mlx5_dev_interrupt_handler, 1306 dev); 1307 if (priv->pending_alarm) 1308 rte_eal_alarm_cancel(mlx5_dev_link_status_handler, dev); 1309 priv->pending_alarm = 0; 1310 priv->intr_handle.fd = 0; 1311 priv->intr_handle.type = RTE_INTR_HANDLE_UNKNOWN; 1312 } 1313 1314 /** 1315 * Install interrupt handler. 1316 * 1317 * @param priv 1318 * Pointer to private structure. 1319 * @param dev 1320 * Pointer to the rte_eth_dev structure. 1321 */ 1322 void 1323 priv_dev_interrupt_handler_install(struct priv *priv, struct rte_eth_dev *dev) 1324 { 1325 int rc, flags; 1326 1327 if (!dev->data->dev_conf.intr_conf.lsc) 1328 return; 1329 assert(priv->ctx->async_fd > 0); 1330 flags = fcntl(priv->ctx->async_fd, F_GETFL); 1331 rc = fcntl(priv->ctx->async_fd, F_SETFL, flags | O_NONBLOCK); 1332 if (rc < 0) { 1333 INFO("failed to change file descriptor async event queue"); 1334 dev->data->dev_conf.intr_conf.lsc = 0; 1335 } else { 1336 priv->intr_handle.fd = priv->ctx->async_fd; 1337 priv->intr_handle.type = RTE_INTR_HANDLE_EXT; 1338 rte_intr_callback_register(&priv->intr_handle, 1339 mlx5_dev_interrupt_handler, 1340 dev); 1341 } 1342 } 1343 1344 /** 1345 * Change the link state (UP / DOWN). 1346 * 1347 * @param priv 1348 * Pointer to Ethernet device structure. 1349 * @param up 1350 * Nonzero for link up, otherwise link down. 1351 * 1352 * @return 1353 * 0 on success, errno value on failure. 1354 */ 1355 static int 1356 priv_set_link(struct priv *priv, int up) 1357 { 1358 struct rte_eth_dev *dev = priv->dev; 1359 int err; 1360 1361 if (up) { 1362 err = priv_set_flags(priv, ~IFF_UP, IFF_UP); 1363 if (err) 1364 return err; 1365 priv_select_tx_function(priv); 1366 priv_select_rx_function(priv); 1367 } else { 1368 err = priv_set_flags(priv, ~IFF_UP, ~IFF_UP); 1369 if (err) 1370 return err; 1371 dev->rx_pkt_burst = removed_rx_burst; 1372 dev->tx_pkt_burst = removed_tx_burst; 1373 } 1374 return 0; 1375 } 1376 1377 /** 1378 * DPDK callback to bring the link DOWN. 1379 * 1380 * @param dev 1381 * Pointer to Ethernet device structure. 1382 * 1383 * @return 1384 * 0 on success, errno value on failure. 1385 */ 1386 int 1387 mlx5_set_link_down(struct rte_eth_dev *dev) 1388 { 1389 struct priv *priv = dev->data->dev_private; 1390 int err; 1391 1392 priv_lock(priv); 1393 err = priv_set_link(priv, 0); 1394 priv_unlock(priv); 1395 return err; 1396 } 1397 1398 /** 1399 * DPDK callback to bring the link UP. 1400 * 1401 * @param dev 1402 * Pointer to Ethernet device structure. 1403 * 1404 * @return 1405 * 0 on success, errno value on failure. 1406 */ 1407 int 1408 mlx5_set_link_up(struct rte_eth_dev *dev) 1409 { 1410 struct priv *priv = dev->data->dev_private; 1411 int err; 1412 1413 priv_lock(priv); 1414 err = priv_set_link(priv, 1); 1415 priv_unlock(priv); 1416 return err; 1417 } 1418 1419 /** 1420 * Configure secondary process queues from a private data pointer (primary 1421 * or secondary) and update burst callbacks. Can take place only once. 1422 * 1423 * All queues must have been previously created by the primary process to 1424 * avoid undefined behavior. 1425 * 1426 * @param priv 1427 * Private data pointer from either primary or secondary process. 1428 * 1429 * @return 1430 * Private data pointer from secondary process, NULL in case of error. 1431 */ 1432 struct priv * 1433 mlx5_secondary_data_setup(struct priv *priv) 1434 { 1435 unsigned int port_id = 0; 1436 struct mlx5_secondary_data *sd; 1437 void **tx_queues; 1438 void **rx_queues; 1439 unsigned int nb_tx_queues; 1440 unsigned int nb_rx_queues; 1441 unsigned int i; 1442 1443 /* priv must be valid at this point. */ 1444 assert(priv != NULL); 1445 /* priv->dev must also be valid but may point to local memory from 1446 * another process, possibly with the same address and must not 1447 * be dereferenced yet. */ 1448 assert(priv->dev != NULL); 1449 /* Determine port ID by finding out where priv comes from. */ 1450 while (1) { 1451 sd = &mlx5_secondary_data[port_id]; 1452 rte_spinlock_lock(&sd->lock); 1453 /* Primary process? */ 1454 if (sd->primary_priv == priv) 1455 break; 1456 /* Secondary process? */ 1457 if (sd->data.dev_private == priv) 1458 break; 1459 rte_spinlock_unlock(&sd->lock); 1460 if (++port_id == RTE_DIM(mlx5_secondary_data)) 1461 port_id = 0; 1462 } 1463 /* Switch to secondary private structure. If private data has already 1464 * been updated by another thread, there is nothing else to do. */ 1465 priv = sd->data.dev_private; 1466 if (priv->dev->data == &sd->data) 1467 goto end; 1468 /* Sanity checks. Secondary private structure is supposed to point 1469 * to local eth_dev, itself still pointing to the shared device data 1470 * structure allocated by the primary process. */ 1471 assert(sd->shared_dev_data != &sd->data); 1472 assert(sd->data.nb_tx_queues == 0); 1473 assert(sd->data.tx_queues == NULL); 1474 assert(sd->data.nb_rx_queues == 0); 1475 assert(sd->data.rx_queues == NULL); 1476 assert(priv != sd->primary_priv); 1477 assert(priv->dev->data == sd->shared_dev_data); 1478 assert(priv->txqs_n == 0); 1479 assert(priv->txqs == NULL); 1480 assert(priv->rxqs_n == 0); 1481 assert(priv->rxqs == NULL); 1482 nb_tx_queues = sd->shared_dev_data->nb_tx_queues; 1483 nb_rx_queues = sd->shared_dev_data->nb_rx_queues; 1484 /* Allocate local storage for queues. */ 1485 tx_queues = rte_zmalloc("secondary ethdev->tx_queues", 1486 sizeof(sd->data.tx_queues[0]) * nb_tx_queues, 1487 RTE_CACHE_LINE_SIZE); 1488 rx_queues = rte_zmalloc("secondary ethdev->rx_queues", 1489 sizeof(sd->data.rx_queues[0]) * nb_rx_queues, 1490 RTE_CACHE_LINE_SIZE); 1491 if (tx_queues == NULL || rx_queues == NULL) 1492 goto error; 1493 /* Lock to prevent control operations during setup. */ 1494 priv_lock(priv); 1495 /* TX queues. */ 1496 for (i = 0; i != nb_tx_queues; ++i) { 1497 struct txq *primary_txq = (*sd->primary_priv->txqs)[i]; 1498 struct txq_ctrl *primary_txq_ctrl; 1499 struct txq_ctrl *txq_ctrl; 1500 1501 if (primary_txq == NULL) 1502 continue; 1503 primary_txq_ctrl = container_of(primary_txq, 1504 struct txq_ctrl, txq); 1505 txq_ctrl = rte_calloc_socket("TXQ", 1, sizeof(*txq_ctrl) + 1506 (1 << primary_txq->elts_n) * 1507 sizeof(struct rte_mbuf *), 0, 1508 primary_txq_ctrl->socket); 1509 if (txq_ctrl != NULL) { 1510 if (txq_ctrl_setup(priv->dev, 1511 txq_ctrl, 1512 1 << primary_txq->elts_n, 1513 primary_txq_ctrl->socket, 1514 NULL) == 0) { 1515 txq_ctrl->txq.stats.idx = 1516 primary_txq->stats.idx; 1517 tx_queues[i] = &txq_ctrl->txq; 1518 continue; 1519 } 1520 rte_free(txq_ctrl); 1521 } 1522 while (i) { 1523 txq_ctrl = tx_queues[--i]; 1524 txq_cleanup(txq_ctrl); 1525 rte_free(txq_ctrl); 1526 } 1527 goto error; 1528 } 1529 /* RX queues. */ 1530 for (i = 0; i != nb_rx_queues; ++i) { 1531 struct rxq_ctrl *primary_rxq = 1532 container_of((*sd->primary_priv->rxqs)[i], 1533 struct rxq_ctrl, rxq); 1534 1535 if (primary_rxq == NULL) 1536 continue; 1537 /* Not supported yet. */ 1538 rx_queues[i] = NULL; 1539 } 1540 /* Update everything. */ 1541 priv->txqs = (void *)tx_queues; 1542 priv->txqs_n = nb_tx_queues; 1543 priv->rxqs = (void *)rx_queues; 1544 priv->rxqs_n = nb_rx_queues; 1545 sd->data.rx_queues = rx_queues; 1546 sd->data.tx_queues = tx_queues; 1547 sd->data.nb_rx_queues = nb_rx_queues; 1548 sd->data.nb_tx_queues = nb_tx_queues; 1549 sd->data.dev_link = sd->shared_dev_data->dev_link; 1550 sd->data.mtu = sd->shared_dev_data->mtu; 1551 memcpy(sd->data.rx_queue_state, sd->shared_dev_data->rx_queue_state, 1552 sizeof(sd->data.rx_queue_state)); 1553 memcpy(sd->data.tx_queue_state, sd->shared_dev_data->tx_queue_state, 1554 sizeof(sd->data.tx_queue_state)); 1555 sd->data.dev_flags = sd->shared_dev_data->dev_flags; 1556 /* Use local data from now on. */ 1557 rte_mb(); 1558 priv->dev->data = &sd->data; 1559 rte_mb(); 1560 priv_select_tx_function(priv); 1561 priv_select_rx_function(priv); 1562 priv_unlock(priv); 1563 end: 1564 /* More sanity checks. */ 1565 assert(priv->dev->data == &sd->data); 1566 rte_spinlock_unlock(&sd->lock); 1567 return priv; 1568 error: 1569 priv_unlock(priv); 1570 rte_free(tx_queues); 1571 rte_free(rx_queues); 1572 rte_spinlock_unlock(&sd->lock); 1573 return NULL; 1574 } 1575 1576 /** 1577 * Configure the TX function to use. 1578 * 1579 * @param priv 1580 * Pointer to private structure. 1581 */ 1582 void 1583 priv_select_tx_function(struct priv *priv) 1584 { 1585 priv->dev->tx_pkt_burst = mlx5_tx_burst; 1586 /* Select appropriate TX function. */ 1587 if (priv->mps == MLX5_MPW_ENHANCED) { 1588 priv->dev->tx_pkt_burst = 1589 mlx5_tx_burst_empw; 1590 DEBUG("selected Enhanced MPW TX function"); 1591 } else if (priv->mps && priv->txq_inline) { 1592 priv->dev->tx_pkt_burst = mlx5_tx_burst_mpw_inline; 1593 DEBUG("selected MPW inline TX function"); 1594 } else if (priv->mps) { 1595 priv->dev->tx_pkt_burst = mlx5_tx_burst_mpw; 1596 DEBUG("selected MPW TX function"); 1597 } 1598 } 1599 1600 /** 1601 * Configure the RX function to use. 1602 * 1603 * @param priv 1604 * Pointer to private structure. 1605 */ 1606 void 1607 priv_select_rx_function(struct priv *priv) 1608 { 1609 priv->dev->rx_pkt_burst = mlx5_rx_burst; 1610 } 1611