drivers/net/mlx5/mlx5_ethdev.c

   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 #define _GNU_SOURCE
  35
  36 #include <stddef.h>
  37 #include <assert.h>
  38 #include <unistd.h>
  39 #include <stdint.h>
  40 #include <stdio.h>
  41 #include <string.h>
  42 #include <stdlib.h>
  43 #include <errno.h>
  44 #include <dirent.h>
  45 #include <net/if.h>
  46 #include <sys/ioctl.h>
  47 #include <sys/socket.h>
  48 #include <sys/utsname.h>
  49 #include <netinet/in.h>
  50 #include <linux/ethtool.h>
  51 #include <linux/sockios.h>
  52 #include <linux/version.h>
  53 #include <fcntl.h>
  54 #include <stdalign.h>
  55 #include <sys/un.h>
  56
  57 #include <rte_atomic.h>
  58 #include <rte_ethdev.h>
  59 #include <rte_bus_pci.h>
  60 #include <rte_mbuf.h>
  61 #include <rte_common.h>
  62 #include <rte_interrupts.h>
  63 #include <rte_alarm.h>
  64 #include <rte_malloc.h>
  65
  66 #include "mlx5.h"
  67 #include "mlx5_rxtx.h"
  68 #include "mlx5_utils.h"
  69
  70 /* Add defines in case the running kernel is not the same as user headers. */
  71 #ifndef ETHTOOL_GLINKSETTINGS
  72 struct ethtool_link_settings {
  73         uint32_t cmd;
  74         uint32_t speed;
  75         uint8_t duplex;
  76         uint8_t port;
  77         uint8_t phy_address;
  78         uint8_t autoneg;
  79         uint8_t mdio_support;
  80         uint8_t eth_to_mdix;
  81         uint8_t eth_tp_mdix_ctrl;
  82         int8_t link_mode_masks_nwords;
  83         uint32_t reserved[8];
  84         uint32_t link_mode_masks[];
  85 };
  86
  87 #define ETHTOOL_GLINKSETTINGS 0x0000004c
  88 #define ETHTOOL_LINK_MODE_1000baseT_Full_BIT 5
  89 #define ETHTOOL_LINK_MODE_Autoneg_BIT 6
  90 #define ETHTOOL_LINK_MODE_1000baseKX_Full_BIT 17
  91 #define ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT 18
  92 #define ETHTOOL_LINK_MODE_10000baseKR_Full_BIT 19
  93 #define ETHTOOL_LINK_MODE_10000baseR_FEC_BIT 20
  94 #define ETHTOOL_LINK_MODE_20000baseMLD2_Full_BIT 21
  95 #define ETHTOOL_LINK_MODE_20000baseKR2_Full_BIT 22
  96 #define ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT 23
  97 #define ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT 24
  98 #define ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT 25
  99 #define ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT 26
 100 #define ETHTOOL_LINK_MODE_56000baseKR4_Full_BIT 27
 101 #define ETHTOOL_LINK_MODE_56000baseCR4_Full_BIT 28
 102 #define ETHTOOL_LINK_MODE_56000baseSR4_Full_BIT 29
 103 #define ETHTOOL_LINK_MODE_56000baseLR4_Full_BIT 30
 104 #endif
 105 #ifndef HAVE_ETHTOOL_LINK_MODE_25G
 106 #define ETHTOOL_LINK_MODE_25000baseCR_Full_BIT 31
 107 #define ETHTOOL_LINK_MODE_25000baseKR_Full_BIT 32
 108 #define ETHTOOL_LINK_MODE_25000baseSR_Full_BIT 33
 109 #endif
 110 #ifndef HAVE_ETHTOOL_LINK_MODE_50G
 111 #define ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT 34
 112 #define ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT 35
 113 #endif
 114 #ifndef HAVE_ETHTOOL_LINK_MODE_100G
 115 #define ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT 36
 116 #define ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT 37
 117 #define ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT 38
 118 #define ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT 39
 119 #endif
 120
 121 /**
 122  * Get interface name from private structure.
 123  *
 124  * @param[in] priv
 125  *   Pointer to private structure.
 126  * @param[out] ifname
 127  *   Interface name output buffer.
 128  *
 129  * @return
 130  *   0 on success, -1 on failure and errno is set.
 131  */
 132 int
 133 priv_get_ifname(const struct priv *priv, char (*ifname)[IF_NAMESIZE])
 134 {
 135         DIR *dir;
 136         struct dirent *dent;
 137         unsigned int dev_type = 0;
 138         unsigned int dev_port_prev = ~0u;
 139         char match[IF_NAMESIZE] = "";
 140
 141         {
 142                 MKSTR(path, "%s/device/net", priv->ibdev_path);
 143
 144                 dir = opendir(path);
 145                 if (dir == NULL)
 146                         return -1;
 147         }
 148         while ((dent = readdir(dir)) != NULL) {
 149                 char *name = dent->d_name;
 150                 FILE *file;
 151                 unsigned int dev_port;
 152                 int r;
 153
 154                 if ((name[0] == '.') &&
 155                     ((name[1] == '\0') ||
 156                      ((name[1] == '.') && (name[2] == '\0'))))
 157                         continue;
 158
 159                 MKSTR(path, "%s/device/net/%s/%s",
 160                       priv->ibdev_path, name,
 161                       (dev_type ? "dev_id" : "dev_port"));
 162
 163                 file = fopen(path, "rb");
 164                 if (file == NULL) {
 165                         if (errno != ENOENT)
 166                                 continue;
 167                         /*
 168                          * Switch to dev_id when dev_port does not exist as
 169                          * is the case with Linux kernel versions < 3.15.
 170                          */
 171 try_dev_id:
 172                         match[0] = '\0';
 173                         if (dev_type)
 174                                 break;
 175                         dev_type = 1;
 176                         dev_port_prev = ~0u;
 177                         rewinddir(dir);
 178                         continue;
 179                 }
 180                 r = fscanf(file, (dev_type ? "%x" : "%u"), &dev_port);
 181                 fclose(file);
 182                 if (r != 1)
 183                         continue;
 184                 /*
 185                  * Switch to dev_id when dev_port returns the same value for
 186                  * all ports. May happen when using a MOFED release older than
 187                  * 3.0 with a Linux kernel >= 3.15.
 188                  */
 189                 if (dev_port == dev_port_prev)
 190                         goto try_dev_id;
 191                 dev_port_prev = dev_port;
 192                 if (dev_port == (priv->port - 1u))
 193                         snprintf(match, sizeof(match), "%s", name);
 194         }
 195         closedir(dir);
 196         if (match[0] == '\0')
 197                 return -1;
 198         strncpy(*ifname, match, sizeof(*ifname));
 199         return 0;
 200 }
 201
 202 /**
 203  * Check if the counter is located on ib counters file.
 204  *
 205  * @param[in] cntr
 206  *   Counter name.
 207  *
 208  * @return
 209  *   1 if counter is located on ib counters file , 0 otherwise.
 210  */
 211 int
 212 priv_is_ib_cntr(const char *cntr)
 213 {
 214         if (!strcmp(cntr, "out_of_buffer"))
 215                 return 1;
 216         return 0;
 217 }
 218
 219 /**
 220  * Read from sysfs entry.
 221  *
 222  * @param[in] priv
 223  *   Pointer to private structure.
 224  * @param[in] entry
 225  *   Entry name relative to sysfs path.
 226  * @param[out] buf
 227  *   Data output buffer.
 228  * @param size
 229  *   Buffer size.
 230  *
 231  * @return
 232  *   0 on success, -1 on failure and errno is set.
 233  */
 234 static int
 235 priv_sysfs_read(const struct priv *priv, const char *entry,
 236                 char *buf, size_t size)
 237 {
 238         char ifname[IF_NAMESIZE];
 239         FILE *file;
 240         int ret;
 241         int err;
 242
 243         if (priv_get_ifname(priv, &ifname))
 244                 return -1;
 245
 246         if (priv_is_ib_cntr(entry)) {
 247                 MKSTR(path, "%s/ports/1/hw_counters/%s",
 248                       priv->ibdev_path, entry);
 249                 file = fopen(path, "rb");
 250         } else {
 251                 MKSTR(path, "%s/device/net/%s/%s",
 252                       priv->ibdev_path, ifname, entry);
 253                 file = fopen(path, "rb");
 254         }
 255         if (file == NULL)
 256                 return -1;
 257         ret = fread(buf, 1, size, file);
 258         err = errno;
 259         if (((size_t)ret < size) && (ferror(file)))
 260                 ret = -1;
 261         else
 262                 ret = size;
 263         fclose(file);
 264         errno = err;
 265         return ret;
 266 }
 267
 268 /**
 269  * Write to sysfs entry.
 270  *
 271  * @param[in] priv
 272  *   Pointer to private structure.
 273  * @param[in] entry
 274  *   Entry name relative to sysfs path.
 275  * @param[in] buf
 276  *   Data buffer.
 277  * @param size
 278  *   Buffer size.
 279  *
 280  * @return
 281  *   0 on success, -1 on failure and errno is set.
 282  */
 283 static int
 284 priv_sysfs_write(const struct priv *priv, const char *entry,
 285                  char *buf, size_t size)
 286 {
 287         char ifname[IF_NAMESIZE];
 288         FILE *file;
 289         int ret;
 290         int err;
 291
 292         if (priv_get_ifname(priv, &ifname))
 293                 return -1;
 294
 295         MKSTR(path, "%s/device/net/%s/%s", priv->ibdev_path, ifname, entry);
 296
 297         file = fopen(path, "wb");
 298         if (file == NULL)
 299                 return -1;
 300         ret = fwrite(buf, 1, size, file);
 301         err = errno;
 302         if (((size_t)ret < size) || (ferror(file)))
 303                 ret = -1;
 304         else
 305                 ret = size;
 306         fclose(file);
 307         errno = err;
 308         return ret;
 309 }
 310
 311 /**
 312  * Get unsigned long sysfs property.
 313  *
 314  * @param priv
 315  *   Pointer to private structure.
 316  * @param[in] name
 317  *   Entry name relative to sysfs path.
 318  * @param[out] value
 319  *   Value output buffer.
 320  *
 321  * @return
 322  *   0 on success, -1 on failure and errno is set.
 323  */
 324 static int
 325 priv_get_sysfs_ulong(struct priv *priv, const char *name, unsigned long *value)
 326 {
 327         int ret;
 328         unsigned long value_ret;
 329         char value_str[32];
 330
 331         ret = priv_sysfs_read(priv, name, value_str, (sizeof(value_str) - 1));
 332         if (ret == -1) {
 333                 DEBUG("cannot read %s value from sysfs: %s",
 334                       name, strerror(errno));
 335                 return -1;
 336         }
 337         value_str[ret] = '\0';
 338         errno = 0;
 339         value_ret = strtoul(value_str, NULL, 0);
 340         if (errno) {
 341                 DEBUG("invalid %s value `%s': %s", name, value_str,
 342                       strerror(errno));
 343                 return -1;
 344         }
 345         *value = value_ret;
 346         return 0;
 347 }
 348
 349 /**
 350  * Set unsigned long sysfs property.
 351  *
 352  * @param priv
 353  *   Pointer to private structure.
 354  * @param[in] name
 355  *   Entry name relative to sysfs path.
 356  * @param value
 357  *   Value to set.
 358  *
 359  * @return
 360  *   0 on success, -1 on failure and errno is set.
 361  */
 362 static int
 363 priv_set_sysfs_ulong(struct priv *priv, const char *name, unsigned long value)
 364 {
 365         int ret;
 366         MKSTR(value_str, "%lu", value);
 367
 368         ret = priv_sysfs_write(priv, name, value_str, (sizeof(value_str) - 1));
 369         if (ret == -1) {
 370                 DEBUG("cannot write %s `%s' (%lu) to sysfs: %s",
 371                       name, value_str, value, strerror(errno));
 372                 return -1;
 373         }
 374         return 0;
 375 }
 376
 377 /**
 378  * Perform ifreq ioctl() on associated Ethernet device.
 379  *
 380  * @param[in] priv
 381  *   Pointer to private structure.
 382  * @param req
 383  *   Request number to pass to ioctl().
 384  * @param[out] ifr
 385  *   Interface request structure output buffer.
 386  *
 387  * @return
 388  *   0 on success, -1 on failure and errno is set.
 389  */
 390 int
 391 priv_ifreq(const struct priv *priv, int req, struct ifreq *ifr)
 392 {
 393         int sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP);
 394         int ret = -1;
 395
 396         if (sock == -1)
 397                 return ret;
 398         if (priv_get_ifname(priv, &ifr->ifr_name) == 0)
 399                 ret = ioctl(sock, req, ifr);
 400         close(sock);
 401         return ret;
 402 }
 403
 404 /**
 405  * Return the number of active VFs for the current device.
 406  *
 407  * @param[in] priv
 408  *   Pointer to private structure.
 409  * @param[out] num_vfs
 410  *   Number of active VFs.
 411  *
 412  * @return
 413  *   0 on success, -1 on failure and errno is set.
 414  */
 415 int
 416 priv_get_num_vfs(struct priv *priv, uint16_t *num_vfs)
 417 {
 418         /* The sysfs entry name depends on the operating system. */
 419         const char **name = (const char *[]){
 420                 "device/sriov_numvfs",
 421                 "device/mlx5_num_vfs",
 422                 NULL,
 423         };
 424         int ret;
 425
 426         do {
 427                 unsigned long ulong_num_vfs;
 428
 429                 ret = priv_get_sysfs_ulong(priv, *name, &ulong_num_vfs);
 430                 if (!ret)
 431                         *num_vfs = ulong_num_vfs;
 432         } while (*(++name) && ret);
 433         return ret;
 434 }
 435
 436 /**
 437  * Get device MTU.
 438  *
 439  * @param priv
 440  *   Pointer to private structure.
 441  * @param[out] mtu
 442  *   MTU value output buffer.
 443  *
 444  * @return
 445  *   0 on success, -1 on failure and errno is set.
 446  */
 447 int
 448 priv_get_mtu(struct priv *priv, uint16_t *mtu)
 449 {
 450         unsigned long ulong_mtu;
 451
 452         if (priv_get_sysfs_ulong(priv, "mtu", &ulong_mtu) == -1)
 453                 return -1;
 454         *mtu = ulong_mtu;
 455         return 0;
 456 }
 457
 458 /**
 459  * Read device counter from sysfs.
 460  *
 461  * @param priv
 462  *   Pointer to private structure.
 463  * @param name
 464  *   Counter name.
 465  * @param[out] cntr
 466  *   Counter output buffer.
 467  *
 468  * @return
 469  *   0 on success, -1 on failure and errno is set.
 470  */
 471 int
 472 priv_get_cntr_sysfs(struct priv *priv, const char *name, uint64_t *cntr)
 473 {
 474         unsigned long ulong_ctr;
 475
 476         if (priv_get_sysfs_ulong(priv, name, &ulong_ctr) == -1)
 477                 return -1;
 478         *cntr = ulong_ctr;
 479         return 0;
 480 }
 481
 482 /**
 483  * Set device MTU.
 484  *
 485  * @param priv
 486  *   Pointer to private structure.
 487  * @param mtu
 488  *   MTU value to set.
 489  *
 490  * @return
 491  *   0 on success, -1 on failure and errno is set.
 492  */
 493 static int
 494 priv_set_mtu(struct priv *priv, uint16_t mtu)
 495 {
 496         uint16_t new_mtu;
 497
 498         if (priv_set_sysfs_ulong(priv, "mtu", mtu) ||
 499             priv_get_mtu(priv, &new_mtu))
 500                 return -1;
 501         if (new_mtu == mtu)
 502                 return 0;
 503         errno = EINVAL;
 504         return -1;
 505 }
 506
 507 /**
 508  * Set device flags.
 509  *
 510  * @param priv
 511  *   Pointer to private structure.
 512  * @param keep
 513  *   Bitmask for flags that must remain untouched.
 514  * @param flags
 515  *   Bitmask for flags to modify.
 516  *
 517  * @return
 518  *   0 on success, -1 on failure and errno is set.
 519  */
 520 int
 521 priv_set_flags(struct priv *priv, unsigned int keep, unsigned int flags)
 522 {
 523         unsigned long tmp;
 524
 525         if (priv_get_sysfs_ulong(priv, "flags", &tmp) == -1)
 526                 return -1;
 527         tmp &= keep;
 528         tmp |= (flags & (~keep));
 529         return priv_set_sysfs_ulong(priv, "flags", tmp);
 530 }
 531
 532 /**
 533  * Ethernet device configuration.
 534  *
 535  * Prepare the driver for a given number of TX and RX queues.
 536  *
 537  * @param dev
 538  *   Pointer to Ethernet device structure.
 539  *
 540  * @return
 541  *   0 on success, errno value on failure.
 542  */
 543 static int
 544 dev_configure(struct rte_eth_dev *dev)
 545 {
 546         struct priv *priv = dev->data->dev_private;
 547         unsigned int rxqs_n = dev->data->nb_rx_queues;
 548         unsigned int txqs_n = dev->data->nb_tx_queues;
 549         unsigned int i;
 550         unsigned int j;
 551         unsigned int reta_idx_n;
 552         const uint8_t use_app_rss_key =
 553                 !!dev->data->dev_conf.rx_adv_conf.rss_conf.rss_key;
 554
 555         if (use_app_rss_key &&
 556             (dev->data->dev_conf.rx_adv_conf.rss_conf.rss_key_len !=
 557              rss_hash_default_key_len)) {
 558                 /* MLX5 RSS only support 40bytes key. */
 559                 return EINVAL;
 560         }
 561         priv->rss_conf.rss_key =
 562                 rte_realloc(priv->rss_conf.rss_key,
 563                             rss_hash_default_key_len, 0);
 564         if (!priv->rss_conf.rss_key) {
 565                 ERROR("cannot allocate RSS hash key memory (%u)", rxqs_n);
 566                 return ENOMEM;
 567         }
 568         memcpy(priv->rss_conf.rss_key,
 569                use_app_rss_key ?
 570                dev->data->dev_conf.rx_adv_conf.rss_conf.rss_key :
 571                rss_hash_default_key,
 572                rss_hash_default_key_len);
 573         priv->rss_conf.rss_key_len = rss_hash_default_key_len;
 574         priv->rss_conf.rss_hf = dev->data->dev_conf.rx_adv_conf.rss_conf.rss_hf;
 575         priv->rxqs = (void *)dev->data->rx_queues;
 576         priv->txqs = (void *)dev->data->tx_queues;
 577         if (txqs_n != priv->txqs_n) {
 578                 INFO("%p: TX queues number update: %u -> %u",
 579                      (void *)dev, priv->txqs_n, txqs_n);
 580                 priv->txqs_n = txqs_n;
 581         }
 582         if (rxqs_n > priv->ind_table_max_size) {
 583                 ERROR("cannot handle this many RX queues (%u)", rxqs_n);
 584                 return EINVAL;
 585         }
 586         if (rxqs_n == priv->rxqs_n)
 587                 return 0;
 588         INFO("%p: RX queues number update: %u -> %u",
 589              (void *)dev, priv->rxqs_n, rxqs_n);
 590         priv->rxqs_n = rxqs_n;
 591         /* If the requested number of RX queues is not a power of two, use the
 592          * maximum indirection table size for better balancing.
 593          * The result is always rounded to the next power of two. */
 594         reta_idx_n = (1 << log2above((rxqs_n & (rxqs_n - 1)) ?
 595                                      priv->ind_table_max_size :
 596                                      rxqs_n));
 597         if (priv_rss_reta_index_resize(priv, reta_idx_n))
 598                 return ENOMEM;
 599         /* When the number of RX queues is not a power of two, the remaining
 600          * table entries are padded with reused WQs and hashes are not spread
 601          * uniformly. */
 602         for (i = 0, j = 0; (i != reta_idx_n); ++i) {
 603                 (*priv->reta_idx)[i] = j;
 604                 if (++j == rxqs_n)
 605                         j = 0;
 606         }
 607         return 0;
 608 }
 609
 610 /**
 611  * DPDK callback for Ethernet device configuration.
 612  *
 613  * @param dev
 614  *   Pointer to Ethernet device structure.
 615  *
 616  * @return
 617  *   0 on success, negative errno value on failure.
 618  */
 619 int
 620 mlx5_dev_configure(struct rte_eth_dev *dev)
 621 {
 622         struct priv *priv = dev->data->dev_private;
 623         int ret;
 624
 625         priv_lock(priv);
 626         ret = dev_configure(dev);
 627         assert(ret >= 0);
 628         priv_unlock(priv);
 629         return -ret;
 630 }
 631
 632 /**
 633  * DPDK callback to get information about the device.
 634  *
 635  * @param dev
 636  *   Pointer to Ethernet device structure.
 637  * @param[out] info
 638  *   Info structure output buffer.
 639  */
 640 void
 641 mlx5_dev_infos_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *info)
 642 {
 643         struct priv *priv = dev->data->dev_private;
 644         unsigned int max;
 645         char ifname[IF_NAMESIZE];
 646
 647         info->pci_dev = RTE_ETH_DEV_TO_PCI(dev);
 648
 649         priv_lock(priv);
 650         /* FIXME: we should ask the device for these values. */
 651         info->min_rx_bufsize = 32;
 652         info->max_rx_pktlen = 65536;
 653         /*
 654          * Since we need one CQ per QP, the limit is the minimum number
 655          * between the two values.
 656          */
 657         max = RTE_MIN(priv->device_attr.orig_attr.max_cq,
 658                       priv->device_attr.orig_attr.max_qp);
 659         /* If max >= 65535 then max = 0, max_rx_queues is uint16_t. */
 660         if (max >= 65535)
 661                 max = 65535;
 662         info->max_rx_queues = max;
 663         info->max_tx_queues = max;
 664         info->max_mac_addrs = RTE_DIM(priv->mac);
 665         info->rx_offload_capa =
 666                 (priv->hw_csum ?
 667                  (DEV_RX_OFFLOAD_IPV4_CKSUM |
 668                   DEV_RX_OFFLOAD_UDP_CKSUM |
 669                   DEV_RX_OFFLOAD_TCP_CKSUM) :
 670                  0) |
 671                 (priv->hw_vlan_strip ? DEV_RX_OFFLOAD_VLAN_STRIP : 0) |
 672                 DEV_RX_OFFLOAD_TIMESTAMP;
 673
 674         if (!priv->mps)
 675                 info->tx_offload_capa = DEV_TX_OFFLOAD_VLAN_INSERT;
 676         if (priv->hw_csum)
 677                 info->tx_offload_capa |=
 678                         (DEV_TX_OFFLOAD_IPV4_CKSUM |
 679                          DEV_TX_OFFLOAD_UDP_CKSUM |
 680                          DEV_TX_OFFLOAD_TCP_CKSUM);
 681         if (priv->tso)
 682                 info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO;
 683         if (priv->tunnel_en)
 684                 info->tx_offload_capa |= (DEV_TX_OFFLOAD_OUTER_IPV4_CKSUM |
 685                                           DEV_TX_OFFLOAD_VXLAN_TNL_TSO |
 686                                           DEV_TX_OFFLOAD_GRE_TNL_TSO);
 687         if (priv_get_ifname(priv, &ifname) == 0)
 688                 info->if_index = if_nametoindex(ifname);
 689         info->reta_size = priv->reta_idx_n ?
 690                 priv->reta_idx_n : priv->ind_table_max_size;
 691         info->hash_key_size = priv->rss_conf.rss_key_len;
 692         info->speed_capa = priv->link_speed_capa;
 693         priv_unlock(priv);
 694 }
 695
 696 const uint32_t *
 697 mlx5_dev_supported_ptypes_get(struct rte_eth_dev *dev)
 698 {
 699         static const uint32_t ptypes[] = {
 700                 /* refers to rxq_cq_to_pkt_type() */
 701                 RTE_PTYPE_L2_ETHER,
 702                 RTE_PTYPE_L3_IPV4_EXT_UNKNOWN,
 703                 RTE_PTYPE_L3_IPV6_EXT_UNKNOWN,
 704                 RTE_PTYPE_L4_NONFRAG,
 705                 RTE_PTYPE_L4_FRAG,
 706                 RTE_PTYPE_L4_TCP,
 707                 RTE_PTYPE_L4_UDP,
 708                 RTE_PTYPE_INNER_L3_IPV4_EXT_UNKNOWN,
 709                 RTE_PTYPE_INNER_L3_IPV6_EXT_UNKNOWN,
 710                 RTE_PTYPE_INNER_L4_NONFRAG,
 711                 RTE_PTYPE_INNER_L4_FRAG,
 712                 RTE_PTYPE_INNER_L4_TCP,
 713                 RTE_PTYPE_INNER_L4_UDP,
 714                 RTE_PTYPE_UNKNOWN
 715         };
 716
 717         if (dev->rx_pkt_burst == mlx5_rx_burst ||
 718             dev->rx_pkt_burst == mlx5_rx_burst_vec)
 719                 return ptypes;
 720         return NULL;
 721 }
 722
 723 /**
 724  * DPDK callback to retrieve physical link information.
 725  *
 726  * @param dev
 727  *   Pointer to Ethernet device structure.
 728  * @param wait_to_complete
 729  *   Wait for request completion (ignored).
 730  */
 731 static int
 732 mlx5_link_update_unlocked_gset(struct rte_eth_dev *dev, int wait_to_complete)
 733 {
 734         struct priv *priv = dev->data->dev_private;
 735         struct ethtool_cmd edata = {
 736                 .cmd = ETHTOOL_GSET /* Deprecated since Linux v4.5. */
 737         };
 738         struct ifreq ifr;
 739         struct rte_eth_link dev_link;
 740         int link_speed = 0;
 741
 742         /* priv_lock() is not taken to allow concurrent calls. */
 743
 744         (void)wait_to_complete;
 745         if (priv_ifreq(priv, SIOCGIFFLAGS, &ifr)) {
 746                 WARN("ioctl(SIOCGIFFLAGS) failed: %s", strerror(errno));
 747                 return -1;
 748         }
 749         memset(&dev_link, 0, sizeof(dev_link));
 750         dev_link.link_status = ((ifr.ifr_flags & IFF_UP) &&
 751                                 (ifr.ifr_flags & IFF_RUNNING));
 752         ifr.ifr_data = (void *)&edata;
 753         if (priv_ifreq(priv, SIOCETHTOOL, &ifr)) {
 754                 WARN("ioctl(SIOCETHTOOL, ETHTOOL_GSET) failed: %s",
 755                      strerror(errno));
 756                 return -1;
 757         }
 758         link_speed = ethtool_cmd_speed(&edata);
 759         if (link_speed == -1)
 760                 dev_link.link_speed = 0;
 761         else
 762                 dev_link.link_speed = link_speed;
 763         priv->link_speed_capa = 0;
 764         if (edata.supported & SUPPORTED_Autoneg)
 765                 priv->link_speed_capa |= ETH_LINK_SPEED_AUTONEG;
 766         if (edata.supported & (SUPPORTED_1000baseT_Full |
 767                                SUPPORTED_1000baseKX_Full))
 768                 priv->link_speed_capa |= ETH_LINK_SPEED_1G;
 769         if (edata.supported & SUPPORTED_10000baseKR_Full)
 770                 priv->link_speed_capa |= ETH_LINK_SPEED_10G;
 771         if (edata.supported & (SUPPORTED_40000baseKR4_Full |
 772                                SUPPORTED_40000baseCR4_Full |
 773                                SUPPORTED_40000baseSR4_Full |
 774                                SUPPORTED_40000baseLR4_Full))
 775                 priv->link_speed_capa |= ETH_LINK_SPEED_40G;
 776         dev_link.link_duplex = ((edata.duplex == DUPLEX_HALF) ?
 777                                 ETH_LINK_HALF_DUPLEX : ETH_LINK_FULL_DUPLEX);
 778         dev_link.link_autoneg = !(dev->data->dev_conf.link_speeds &
 779                         ETH_LINK_SPEED_FIXED);
 780         if (memcmp(&dev_link, &dev->data->dev_link, sizeof(dev_link))) {
 781                 /* Link status changed. */
 782                 dev->data->dev_link = dev_link;
 783                 return 0;
 784         }
 785         /* Link status is still the same. */
 786         return -1;
 787 }
 788
 789 /**
 790  * Retrieve physical link information (unlocked version using new ioctl).
 791  *
 792  * @param dev
 793  *   Pointer to Ethernet device structure.
 794  * @param wait_to_complete
 795  *   Wait for request completion (ignored).
 796  */
 797 static int
 798 mlx5_link_update_unlocked_gs(struct rte_eth_dev *dev, int wait_to_complete)
 799 {
 800         struct priv *priv = dev->data->dev_private;
 801         struct ethtool_link_settings gcmd = { .cmd = ETHTOOL_GLINKSETTINGS };
 802         struct ifreq ifr;
 803         struct rte_eth_link dev_link;
 804         uint64_t sc;
 805
 806         (void)wait_to_complete;
 807         if (priv_ifreq(priv, SIOCGIFFLAGS, &ifr)) {
 808                 WARN("ioctl(SIOCGIFFLAGS) failed: %s", strerror(errno));
 809                 return -1;
 810         }
 811         memset(&dev_link, 0, sizeof(dev_link));
 812         dev_link.link_status = ((ifr.ifr_flags & IFF_UP) &&
 813                                 (ifr.ifr_flags & IFF_RUNNING));
 814         ifr.ifr_data = (void *)&gcmd;
 815         if (priv_ifreq(priv, SIOCETHTOOL, &ifr)) {
 816                 DEBUG("ioctl(SIOCETHTOOL, ETHTOOL_GLINKSETTINGS) failed: %s",
 817                       strerror(errno));
 818                 return -1;
 819         }
 820         gcmd.link_mode_masks_nwords = -gcmd.link_mode_masks_nwords;
 821
 822         alignas(struct ethtool_link_settings)
 823         uint8_t data[offsetof(struct ethtool_link_settings, link_mode_masks) +
 824                      sizeof(uint32_t) * gcmd.link_mode_masks_nwords * 3];
 825         struct ethtool_link_settings *ecmd = (void *)data;
 826
 827         *ecmd = gcmd;
 828         ifr.ifr_data = (void *)ecmd;
 829         if (priv_ifreq(priv, SIOCETHTOOL, &ifr)) {
 830                 DEBUG("ioctl(SIOCETHTOOL, ETHTOOL_GLINKSETTINGS) failed: %s",
 831                       strerror(errno));
 832                 return -1;
 833         }
 834         dev_link.link_speed = ecmd->speed;
 835         sc = ecmd->link_mode_masks[0] |
 836                 ((uint64_t)ecmd->link_mode_masks[1] << 32);
 837         priv->link_speed_capa = 0;
 838         if (sc & MLX5_BITSHIFT(ETHTOOL_LINK_MODE_Autoneg_BIT))
 839                 priv->link_speed_capa |= ETH_LINK_SPEED_AUTONEG;
 840         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_1000baseT_Full_BIT) |
 841                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_1000baseKX_Full_BIT)))
 842                 priv->link_speed_capa |= ETH_LINK_SPEED_1G;
 843         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT) |
 844                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT) |
 845                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_10000baseR_FEC_BIT)))
 846                 priv->link_speed_capa |= ETH_LINK_SPEED_10G;
 847         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_20000baseMLD2_Full_BIT) |
 848                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_20000baseKR2_Full_BIT)))
 849                 priv->link_speed_capa |= ETH_LINK_SPEED_20G;
 850         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT) |
 851                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT) |
 852                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT) |
 853                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT)))
 854                 priv->link_speed_capa |= ETH_LINK_SPEED_40G;
 855         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_56000baseKR4_Full_BIT) |
 856                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_56000baseCR4_Full_BIT) |
 857                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_56000baseSR4_Full_BIT) |
 858                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_56000baseLR4_Full_BIT)))
 859                 priv->link_speed_capa |= ETH_LINK_SPEED_56G;
 860         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_25000baseCR_Full_BIT) |
 861                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_25000baseKR_Full_BIT) |
 862                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_25000baseSR_Full_BIT)))
 863                 priv->link_speed_capa |= ETH_LINK_SPEED_25G;
 864         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT) |
 865                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT)))
 866                 priv->link_speed_capa |= ETH_LINK_SPEED_50G;
 867         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT) |
 868                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT) |
 869                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT) |
 870                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT)))
 871                 priv->link_speed_capa |= ETH_LINK_SPEED_100G;
 872         dev_link.link_duplex = ((ecmd->duplex == DUPLEX_HALF) ?
 873                                 ETH_LINK_HALF_DUPLEX : ETH_LINK_FULL_DUPLEX);
 874         dev_link.link_autoneg = !(dev->data->dev_conf.link_speeds &
 875                                   ETH_LINK_SPEED_FIXED);
 876         if (memcmp(&dev_link, &dev->data->dev_link, sizeof(dev_link))) {
 877                 /* Link status changed. */
 878                 dev->data->dev_link = dev_link;
 879                 return 0;
 880         }
 881         /* Link status is still the same. */
 882         return -1;
 883 }
 884
 885 /**
 886  * DPDK callback to retrieve physical link information.
 887  *
 888  * @param dev
 889  *   Pointer to Ethernet device structure.
 890  * @param wait_to_complete
 891  *   Wait for request completion (ignored).
 892  */
 893 int
 894 mlx5_link_update(struct rte_eth_dev *dev, int wait_to_complete)
 895 {
 896         struct utsname utsname;
 897         int ver[3];
 898
 899         if (uname(&utsname) == -1 ||
 900             sscanf(utsname.release, "%d.%d.%d",
 901                    &ver[0], &ver[1], &ver[2]) != 3 ||
 902             KERNEL_VERSION(ver[0], ver[1], ver[2]) < KERNEL_VERSION(4, 9, 0))
 903                 return mlx5_link_update_unlocked_gset(dev, wait_to_complete);
 904         return mlx5_link_update_unlocked_gs(dev, wait_to_complete);
 905 }
 906
 907 /**
 908  * DPDK callback to change the MTU.
 909  *
 910  * @param dev
 911  *   Pointer to Ethernet device structure.
 912  * @param in_mtu
 913  *   New MTU.
 914  *
 915  * @return
 916  *   0 on success, negative errno value on failure.
 917  */
 918 int
 919 mlx5_dev_set_mtu(struct rte_eth_dev *dev, uint16_t mtu)
 920 {
 921         struct priv *priv = dev->data->dev_private;
 922         uint16_t kern_mtu;
 923         int ret = 0;
 924
 925         priv_lock(priv);
 926         ret = priv_get_mtu(priv, &kern_mtu);
 927         if (ret)
 928                 goto out;
 929         /* Set kernel interface MTU first. */
 930         ret = priv_set_mtu(priv, mtu);
 931         if (ret)
 932                 goto out;
 933         ret = priv_get_mtu(priv, &kern_mtu);
 934         if (ret)
 935                 goto out;
 936         if (kern_mtu == mtu) {
 937                 priv->mtu = mtu;
 938                 DEBUG("adapter port %u MTU set to %u", priv->port, mtu);
 939         }
 940         priv_unlock(priv);
 941         return 0;
 942 out:
 943         ret = errno;
 944         WARN("cannot set port %u MTU to %u: %s", priv->port, mtu,
 945              strerror(ret));
 946         priv_unlock(priv);
 947         assert(ret >= 0);
 948         return -ret;
 949 }
 950
 951 /**
 952  * DPDK callback to get flow control status.
 953  *
 954  * @param dev
 955  *   Pointer to Ethernet device structure.
 956  * @param[out] fc_conf
 957  *   Flow control output buffer.
 958  *
 959  * @return
 960  *   0 on success, negative errno value on failure.
 961  */
 962 int
 963 mlx5_dev_get_flow_ctrl(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
 964 {
 965         struct priv *priv = dev->data->dev_private;
 966         struct ifreq ifr;
 967         struct ethtool_pauseparam ethpause = {
 968                 .cmd = ETHTOOL_GPAUSEPARAM
 969         };
 970         int ret;
 971
 972         ifr.ifr_data = (void *)&ethpause;
 973         priv_lock(priv);
 974         if (priv_ifreq(priv, SIOCETHTOOL, &ifr)) {
 975                 ret = errno;
 976                 WARN("ioctl(SIOCETHTOOL, ETHTOOL_GPAUSEPARAM)"
 977                      " failed: %s",
 978                      strerror(ret));
 979                 goto out;
 980         }
 981
 982         fc_conf->autoneg = ethpause.autoneg;
 983         if (ethpause.rx_pause && ethpause.tx_pause)
 984                 fc_conf->mode = RTE_FC_FULL;
 985         else if (ethpause.rx_pause)
 986                 fc_conf->mode = RTE_FC_RX_PAUSE;
 987         else if (ethpause.tx_pause)
 988                 fc_conf->mode = RTE_FC_TX_PAUSE;
 989         else
 990                 fc_conf->mode = RTE_FC_NONE;
 991         ret = 0;
 992
 993 out:
 994         priv_unlock(priv);
 995         assert(ret >= 0);
 996         return -ret;
 997 }
 998
 999 /**
1000  * DPDK callback to modify flow control parameters.
1001  *
1002  * @param dev
1003  *   Pointer to Ethernet device structure.
1004  * @param[in] fc_conf
1005  *   Flow control parameters.
1006  *
1007  * @return
1008  *   0 on success, negative errno value on failure.
1009  */
1010 int
1011 mlx5_dev_set_flow_ctrl(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
1012 {
1013         struct priv *priv = dev->data->dev_private;
1014         struct ifreq ifr;
1015         struct ethtool_pauseparam ethpause = {
1016                 .cmd = ETHTOOL_SPAUSEPARAM
1017         };
1018         int ret;
1019
1020         ifr.ifr_data = (void *)&ethpause;
1021         ethpause.autoneg = fc_conf->autoneg;
1022         if (((fc_conf->mode & RTE_FC_FULL) == RTE_FC_FULL) ||
1023             (fc_conf->mode & RTE_FC_RX_PAUSE))
1024                 ethpause.rx_pause = 1;
1025         else
1026                 ethpause.rx_pause = 0;
1027
1028         if (((fc_conf->mode & RTE_FC_FULL) == RTE_FC_FULL) ||
1029             (fc_conf->mode & RTE_FC_TX_PAUSE))
1030                 ethpause.tx_pause = 1;
1031         else
1032                 ethpause.tx_pause = 0;
1033
1034         priv_lock(priv);
1035         if (priv_ifreq(priv, SIOCETHTOOL, &ifr)) {
1036                 ret = errno;
1037                 WARN("ioctl(SIOCETHTOOL, ETHTOOL_SPAUSEPARAM)"
1038                      " failed: %s",
1039                      strerror(ret));
1040                 goto out;
1041         }
1042         ret = 0;
1043
1044 out:
1045         priv_unlock(priv);
1046         assert(ret >= 0);
1047         return -ret;
1048 }
1049
1050 /**
1051  * Get PCI information from struct ibv_device.
1052  *
1053  * @param device
1054  *   Pointer to Ethernet device structure.
1055  * @param[out] pci_addr
1056  *   PCI bus address output buffer.
1057  *
1058  * @return
1059  *   0 on success, -1 on failure and errno is set.
1060  */
1061 int
1062 mlx5_ibv_device_to_pci_addr(const struct ibv_device *device,
1063                             struct rte_pci_addr *pci_addr)
1064 {
1065         FILE *file;
1066         char line[32];
1067         MKSTR(path, "%s/device/uevent", device->ibdev_path);
1068
1069         file = fopen(path, "rb");
1070         if (file == NULL)
1071                 return -1;
1072         while (fgets(line, sizeof(line), file) == line) {
1073                 size_t len = strlen(line);
1074                 int ret;
1075
1076                 /* Truncate long lines. */
1077                 if (len == (sizeof(line) - 1))
1078                         while (line[(len - 1)] != '\n') {
1079                                 ret = fgetc(file);
1080                                 if (ret == EOF)
1081                                         break;
1082                                 line[(len - 1)] = ret;
1083                         }
1084                 /* Extract information. */
1085                 if (sscanf(line,
1086                            "PCI_SLOT_NAME="
1087                            "%" SCNx32 ":%" SCNx8 ":%" SCNx8 ".%" SCNx8 "\n",
1088                            &pci_addr->domain,
1089                            &pci_addr->bus,
1090                            &pci_addr->devid,
1091                            &pci_addr->function) == 4) {
1092                         ret = 0;
1093                         break;
1094                 }
1095         }
1096         fclose(file);
1097         return 0;
1098 }
1099
1100 /**
1101  * Update the link status.
1102  *
1103  * @param priv
1104  *   Pointer to private structure.
1105  *
1106  * @return
1107  *   Zero if the callback process can be called immediately.
1108  */
1109 static int
1110 priv_link_status_update(struct priv *priv)
1111 {
1112         struct rte_eth_link *link = &priv->dev->data->dev_link;
1113
1114         mlx5_link_update(priv->dev, 0);
1115         if (((link->link_speed == 0) && link->link_status) ||
1116                 ((link->link_speed != 0) && !link->link_status)) {
1117                 /*
1118                  * Inconsistent status. Event likely occurred before the
1119                  * kernel netdevice exposes the new status.
1120                  */
1121                 if (!priv->pending_alarm) {
1122                         priv->pending_alarm = 1;
1123                         rte_eal_alarm_set(MLX5_ALARM_TIMEOUT_US,
1124                                           mlx5_dev_link_status_handler,
1125                                           priv->dev);
1126                 }
1127                 return 1;
1128         } else if (unlikely(priv->pending_alarm)) {
1129                 /* Link interrupt occurred while alarm is already scheduled. */
1130                 priv->pending_alarm = 0;
1131                 rte_eal_alarm_cancel(mlx5_dev_link_status_handler, priv->dev);
1132         }
1133         return 0;
1134 }
1135
1136 /**
1137  * Device status handler.
1138  *
1139  * @param priv
1140  *   Pointer to private structure.
1141  * @param events
1142  *   Pointer to event flags holder.
1143  *
1144  * @return
1145  *   Events bitmap of callback process which can be called immediately.
1146  */
1147 static uint32_t
1148 priv_dev_status_handler(struct priv *priv)
1149 {
1150         struct ibv_async_event event;
1151         uint32_t ret = 0;
1152
1153         /* Read all message and acknowledge them. */
1154         for (;;) {
1155                 if (ibv_get_async_event(priv->ctx, &event))
1156                         break;
1157                 if ((event.event_type == IBV_EVENT_PORT_ACTIVE ||
1158                         event.event_type == IBV_EVENT_PORT_ERR) &&
1159                         (priv->dev->data->dev_conf.intr_conf.lsc == 1))
1160                         ret |= (1 << RTE_ETH_EVENT_INTR_LSC);
1161                 else if (event.event_type == IBV_EVENT_DEVICE_FATAL &&
1162                         priv->dev->data->dev_conf.intr_conf.rmv == 1)
1163                         ret |= (1 << RTE_ETH_EVENT_INTR_RMV);
1164                 else
1165                         DEBUG("event type %d on port %d not handled",
1166                               event.event_type, event.element.port_num);
1167                 ibv_ack_async_event(&event);
1168         }
1169         if (ret & (1 << RTE_ETH_EVENT_INTR_LSC))
1170                 if (priv_link_status_update(priv))
1171                         ret &= ~(1 << RTE_ETH_EVENT_INTR_LSC);
1172         return ret;
1173 }
1174
1175 /**
1176  * Handle delayed link status event.
1177  *
1178  * @param arg
1179  *   Registered argument.
1180  */
1181 void
1182 mlx5_dev_link_status_handler(void *arg)
1183 {
1184         struct rte_eth_dev *dev = arg;
1185         struct priv *priv = dev->data->dev_private;
1186         int ret;
1187
1188         priv_lock(priv);
1189         assert(priv->pending_alarm == 1);
1190         priv->pending_alarm = 0;
1191         ret = priv_link_status_update(priv);
1192         priv_unlock(priv);
1193         if (!ret)
1194                 _rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL,
1195                                               NULL);
1196 }
1197
1198 /**
1199  * Handle interrupts from the NIC.
1200  *
1201  * @param[in] intr_handle
1202  *   Interrupt handler.
1203  * @param cb_arg
1204  *   Callback argument.
1205  */
1206 void
1207 mlx5_dev_interrupt_handler(void *cb_arg)
1208 {
1209         struct rte_eth_dev *dev = cb_arg;
1210         struct priv *priv = dev->data->dev_private;
1211         uint32_t events;
1212
1213         priv_lock(priv);
1214         events = priv_dev_status_handler(priv);
1215         priv_unlock(priv);
1216         if (events & (1 << RTE_ETH_EVENT_INTR_LSC))
1217                 _rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL,
1218                                               NULL);
1219         if (events & (1 << RTE_ETH_EVENT_INTR_RMV))
1220                 _rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_RMV, NULL,
1221                                               NULL);
1222 }
1223
1224 /**
1225  * Handle interrupts from the socket.
1226  *
1227  * @param cb_arg
1228  *   Callback argument.
1229  */
1230 static void
1231 mlx5_dev_handler_socket(void *cb_arg)
1232 {
1233         struct rte_eth_dev *dev = cb_arg;
1234         struct priv *priv = dev->data->dev_private;
1235
1236         priv_lock(priv);
1237         priv_socket_handle(priv);
1238         priv_unlock(priv);
1239 }
1240
1241 /**
1242  * Uninstall interrupt handler.
1243  *
1244  * @param priv
1245  *   Pointer to private structure.
1246  * @param dev
1247  *   Pointer to the rte_eth_dev structure.
1248  */
1249 void
1250 priv_dev_interrupt_handler_uninstall(struct priv *priv, struct rte_eth_dev *dev)
1251 {
1252         if (dev->data->dev_conf.intr_conf.lsc ||
1253             dev->data->dev_conf.intr_conf.rmv)
1254                 rte_intr_callback_unregister(&priv->intr_handle,
1255                                              mlx5_dev_interrupt_handler, dev);
1256         if (priv->primary_socket)
1257                 rte_intr_callback_unregister(&priv->intr_handle_socket,
1258                                              mlx5_dev_handler_socket, dev);
1259         if (priv->pending_alarm)
1260                 rte_eal_alarm_cancel(mlx5_dev_link_status_handler, dev);
1261         priv->pending_alarm = 0;
1262         priv->intr_handle.fd = 0;
1263         priv->intr_handle.type = RTE_INTR_HANDLE_UNKNOWN;
1264         priv->intr_handle_socket.fd = 0;
1265         priv->intr_handle_socket.type = RTE_INTR_HANDLE_UNKNOWN;
1266 }
1267
1268 /**
1269  * Install interrupt handler.
1270  *
1271  * @param priv
1272  *   Pointer to private structure.
1273  * @param dev
1274  *   Pointer to the rte_eth_dev structure.
1275  */
1276 void
1277 priv_dev_interrupt_handler_install(struct priv *priv, struct rte_eth_dev *dev)
1278 {
1279         int rc, flags;
1280
1281         assert(priv->ctx->async_fd > 0);
1282         flags = fcntl(priv->ctx->async_fd, F_GETFL);
1283         rc = fcntl(priv->ctx->async_fd, F_SETFL, flags | O_NONBLOCK);
1284         if (rc < 0) {
1285                 INFO("failed to change file descriptor async event queue");
1286                 dev->data->dev_conf.intr_conf.lsc = 0;
1287                 dev->data->dev_conf.intr_conf.rmv = 0;
1288         }
1289         if (dev->data->dev_conf.intr_conf.lsc ||
1290             dev->data->dev_conf.intr_conf.rmv) {
1291                 priv->intr_handle.fd = priv->ctx->async_fd;
1292                 priv->intr_handle.type = RTE_INTR_HANDLE_EXT;
1293                 rte_intr_callback_register(&priv->intr_handle,
1294                                            mlx5_dev_interrupt_handler, dev);
1295         }
1296
1297         rc = priv_socket_init(priv);
1298         if (!rc && priv->primary_socket) {
1299                 priv->intr_handle_socket.fd = priv->primary_socket;
1300                 priv->intr_handle_socket.type = RTE_INTR_HANDLE_EXT;
1301                 rte_intr_callback_register(&priv->intr_handle_socket,
1302                                            mlx5_dev_handler_socket, dev);
1303         }
1304 }
1305
1306 /**
1307  * Change the link state (UP / DOWN).
1308  *
1309  * @param priv
1310  *   Pointer to private data structure.
1311  * @param dev
1312  *   Pointer to rte_eth_dev structure.
1313  * @param up
1314  *   Nonzero for link up, otherwise link down.
1315  *
1316  * @return
1317  *   0 on success, errno value on failure.
1318  */
1319 static int
1320 priv_dev_set_link(struct priv *priv, struct rte_eth_dev *dev, int up)
1321 {
1322         int err;
1323
1324         if (up) {
1325                 err = priv_set_flags(priv, ~IFF_UP, IFF_UP);
1326                 if (err)
1327                         return err;
1328                 dev->tx_pkt_burst = priv_select_tx_function(priv, dev);
1329                 dev->rx_pkt_burst = priv_select_rx_function(priv, dev);
1330         } else {
1331                 err = priv_set_flags(priv, ~IFF_UP, ~IFF_UP);
1332                 if (err)
1333                         return err;
1334                 dev->rx_pkt_burst = removed_rx_burst;
1335                 dev->tx_pkt_burst = removed_tx_burst;
1336         }
1337         return 0;
1338 }
1339
1340 /**
1341  * DPDK callback to bring the link DOWN.
1342  *
1343  * @param dev
1344  *   Pointer to Ethernet device structure.
1345  *
1346  * @return
1347  *   0 on success, errno value on failure.
1348  */
1349 int
1350 mlx5_set_link_down(struct rte_eth_dev *dev)
1351 {
1352         struct priv *priv = dev->data->dev_private;
1353         int err;
1354
1355         priv_lock(priv);
1356         err = priv_dev_set_link(priv, dev, 0);
1357         priv_unlock(priv);
1358         return err;
1359 }
1360
1361 /**
1362  * DPDK callback to bring the link UP.
1363  *
1364  * @param dev
1365  *   Pointer to Ethernet device structure.
1366  *
1367  * @return
1368  *   0 on success, errno value on failure.
1369  */
1370 int
1371 mlx5_set_link_up(struct rte_eth_dev *dev)
1372 {
1373         struct priv *priv = dev->data->dev_private;
1374         int err;
1375
1376         priv_lock(priv);
1377         err = priv_dev_set_link(priv, dev, 1);
1378         priv_unlock(priv);
1379         return err;
1380 }
1381
1382 /**
1383  * Configure the TX function to use.
1384  *
1385  * @param priv
1386  *   Pointer to private data structure.
1387  * @param dev
1388  *   Pointer to rte_eth_dev structure.
1389  *
1390  * @return
1391  *   Pointer to selected Tx burst function.
1392  */
1393 eth_tx_burst_t
1394 priv_select_tx_function(struct priv *priv, __rte_unused struct rte_eth_dev *dev)
1395 {
1396         eth_tx_burst_t tx_pkt_burst = mlx5_tx_burst;
1397
1398         assert(priv != NULL);
1399         /* Select appropriate TX function. */
1400         if (priv->mps == MLX5_MPW_ENHANCED) {
1401                 if (priv_check_vec_tx_support(priv) > 0) {
1402                         if (priv_check_raw_vec_tx_support(priv) > 0)
1403                                 tx_pkt_burst = mlx5_tx_burst_raw_vec;
1404                         else
1405                                 tx_pkt_burst = mlx5_tx_burst_vec;
1406                         DEBUG("selected Enhanced MPW TX vectorized function");
1407                 } else {
1408                         tx_pkt_burst = mlx5_tx_burst_empw;
1409                         DEBUG("selected Enhanced MPW TX function");
1410                 }
1411         } else if (priv->mps && priv->txq_inline) {
1412                 tx_pkt_burst = mlx5_tx_burst_mpw_inline;
1413                 DEBUG("selected MPW inline TX function");
1414         } else if (priv->mps) {
1415                 tx_pkt_burst = mlx5_tx_burst_mpw;
1416                 DEBUG("selected MPW TX function");
1417         }
1418         return tx_pkt_burst;
1419 }
1420
1421 /**
1422  * Configure the RX function to use.
1423  *
1424  * @param priv
1425  *   Pointer to private data structure.
1426  * @param dev
1427  *   Pointer to rte_eth_dev structure.
1428  *
1429  * @return
1430  *   Pointer to selected Rx burst function.
1431  */
1432 eth_rx_burst_t
1433 priv_select_rx_function(struct priv *priv, __rte_unused struct rte_eth_dev *dev)
1434 {
1435         eth_rx_burst_t rx_pkt_burst = mlx5_rx_burst;
1436
1437         assert(priv != NULL);
1438         if (priv_check_vec_rx_support(priv) > 0) {
1439                 rx_pkt_burst = mlx5_rx_burst_vec;
1440                 DEBUG("selected RX vectorized function");
1441         }
1442         return rx_pkt_burst;
1443 }