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         uint64_t supp_tx_offloads = mlx5_priv_get_tx_port_offloads(priv);
 555         uint64_t tx_offloads = dev->data->dev_conf.txmode.offloads;
 556         uint64_t supp_rx_offloads =
 557                 (mlx5_priv_get_rx_port_offloads(priv) |
 558                  mlx5_priv_get_rx_queue_offloads(priv));
 559         uint64_t rx_offloads = dev->data->dev_conf.rxmode.offloads;
 560
 561         if ((tx_offloads & supp_tx_offloads) != tx_offloads) {
 562                 ERROR("Some Tx offloads are not supported "
 563                       "requested 0x%" PRIx64 " supported 0x%" PRIx64,
 564                       tx_offloads, supp_tx_offloads);
 565                 return ENOTSUP;
 566         }
 567         if ((rx_offloads & supp_rx_offloads) != rx_offloads) {
 568                 ERROR("Some Rx offloads are not supported "
 569                       "requested 0x%" PRIx64 " supported 0x%" PRIx64,
 570                       rx_offloads, supp_rx_offloads);
 571                 return ENOTSUP;
 572         }
 573         if (use_app_rss_key &&
 574             (dev->data->dev_conf.rx_adv_conf.rss_conf.rss_key_len !=
 575              rss_hash_default_key_len)) {
 576                 /* MLX5 RSS only support 40bytes key. */
 577                 return EINVAL;
 578         }
 579         priv->rss_conf.rss_key =
 580                 rte_realloc(priv->rss_conf.rss_key,
 581                             rss_hash_default_key_len, 0);
 582         if (!priv->rss_conf.rss_key) {
 583                 ERROR("cannot allocate RSS hash key memory (%u)", rxqs_n);
 584                 return ENOMEM;
 585         }
 586         memcpy(priv->rss_conf.rss_key,
 587                use_app_rss_key ?
 588                dev->data->dev_conf.rx_adv_conf.rss_conf.rss_key :
 589                rss_hash_default_key,
 590                rss_hash_default_key_len);
 591         priv->rss_conf.rss_key_len = rss_hash_default_key_len;
 592         priv->rss_conf.rss_hf = dev->data->dev_conf.rx_adv_conf.rss_conf.rss_hf;
 593         priv->rxqs = (void *)dev->data->rx_queues;
 594         priv->txqs = (void *)dev->data->tx_queues;
 595         if (txqs_n != priv->txqs_n) {
 596                 INFO("%p: TX queues number update: %u -> %u",
 597                      (void *)dev, priv->txqs_n, txqs_n);
 598                 priv->txqs_n = txqs_n;
 599         }
 600         if (rxqs_n > priv->config.ind_table_max_size) {
 601                 ERROR("cannot handle this many RX queues (%u)", rxqs_n);
 602                 return EINVAL;
 603         }
 604         if (rxqs_n == priv->rxqs_n)
 605                 return 0;
 606         INFO("%p: RX queues number update: %u -> %u",
 607              (void *)dev, priv->rxqs_n, rxqs_n);
 608         priv->rxqs_n = rxqs_n;
 609         /* If the requested number of RX queues is not a power of two, use the
 610          * maximum indirection table size for better balancing.
 611          * The result is always rounded to the next power of two. */
 612         reta_idx_n = (1 << log2above((rxqs_n & (rxqs_n - 1)) ?
 613                                      priv->config.ind_table_max_size :
 614                                      rxqs_n));
 615         if (priv_rss_reta_index_resize(priv, reta_idx_n))
 616                 return ENOMEM;
 617         /* When the number of RX queues is not a power of two, the remaining
 618          * table entries are padded with reused WQs and hashes are not spread
 619          * uniformly. */
 620         for (i = 0, j = 0; (i != reta_idx_n); ++i) {
 621                 (*priv->reta_idx)[i] = j;
 622                 if (++j == rxqs_n)
 623                         j = 0;
 624         }
 625         return 0;
 626 }
 627
 628 /**
 629  * DPDK callback for Ethernet device configuration.
 630  *
 631  * @param dev
 632  *   Pointer to Ethernet device structure.
 633  *
 634  * @return
 635  *   0 on success, negative errno value on failure.
 636  */
 637 int
 638 mlx5_dev_configure(struct rte_eth_dev *dev)
 639 {
 640         struct priv *priv = dev->data->dev_private;
 641         int ret;
 642
 643         priv_lock(priv);
 644         ret = dev_configure(dev);
 645         assert(ret >= 0);
 646         priv_unlock(priv);
 647         return -ret;
 648 }
 649
 650 /**
 651  * DPDK callback to get information about the device.
 652  *
 653  * @param dev
 654  *   Pointer to Ethernet device structure.
 655  * @param[out] info
 656  *   Info structure output buffer.
 657  */
 658 void
 659 mlx5_dev_infos_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *info)
 660 {
 661         struct priv *priv = dev->data->dev_private;
 662         struct mlx5_dev_config *config = &priv->config;
 663         unsigned int max;
 664         char ifname[IF_NAMESIZE];
 665
 666         info->pci_dev = RTE_ETH_DEV_TO_PCI(dev);
 667
 668         priv_lock(priv);
 669         /* FIXME: we should ask the device for these values. */
 670         info->min_rx_bufsize = 32;
 671         info->max_rx_pktlen = 65536;
 672         /*
 673          * Since we need one CQ per QP, the limit is the minimum number
 674          * between the two values.
 675          */
 676         max = RTE_MIN(priv->device_attr.orig_attr.max_cq,
 677                       priv->device_attr.orig_attr.max_qp);
 678         /* If max >= 65535 then max = 0, max_rx_queues is uint16_t. */
 679         if (max >= 65535)
 680                 max = 65535;
 681         info->max_rx_queues = max;
 682         info->max_tx_queues = max;
 683         info->max_mac_addrs = RTE_DIM(priv->mac);
 684         info->rx_queue_offload_capa =
 685                 mlx5_priv_get_rx_queue_offloads(priv);
 686         info->rx_offload_capa = (mlx5_priv_get_rx_port_offloads(priv) |
 687                                  info->rx_queue_offload_capa);
 688         info->tx_offload_capa = mlx5_priv_get_tx_port_offloads(priv);
 689         if (priv_get_ifname(priv, &ifname) == 0)
 690                 info->if_index = if_nametoindex(ifname);
 691         info->reta_size = priv->reta_idx_n ?
 692                 priv->reta_idx_n : config->ind_table_max_size;
 693         info->hash_key_size = priv->rss_conf.rss_key_len;
 694         info->speed_capa = priv->link_speed_capa;
 695         priv_unlock(priv);
 696 }
 697
 698 const uint32_t *
 699 mlx5_dev_supported_ptypes_get(struct rte_eth_dev *dev)
 700 {
 701         static const uint32_t ptypes[] = {
 702                 /* refers to rxq_cq_to_pkt_type() */
 703                 RTE_PTYPE_L2_ETHER,
 704                 RTE_PTYPE_L3_IPV4_EXT_UNKNOWN,
 705                 RTE_PTYPE_L3_IPV6_EXT_UNKNOWN,
 706                 RTE_PTYPE_L4_NONFRAG,
 707                 RTE_PTYPE_L4_FRAG,
 708                 RTE_PTYPE_L4_TCP,
 709                 RTE_PTYPE_L4_UDP,
 710                 RTE_PTYPE_INNER_L3_IPV4_EXT_UNKNOWN,
 711                 RTE_PTYPE_INNER_L3_IPV6_EXT_UNKNOWN,
 712                 RTE_PTYPE_INNER_L4_NONFRAG,
 713                 RTE_PTYPE_INNER_L4_FRAG,
 714                 RTE_PTYPE_INNER_L4_TCP,
 715                 RTE_PTYPE_INNER_L4_UDP,
 716                 RTE_PTYPE_UNKNOWN
 717         };
 718
 719         if (dev->rx_pkt_burst == mlx5_rx_burst ||
 720             dev->rx_pkt_burst == mlx5_rx_burst_vec)
 721                 return ptypes;
 722         return NULL;
 723 }
 724
 725 /**
 726  * DPDK callback to retrieve physical link information.
 727  *
 728  * @param dev
 729  *   Pointer to Ethernet device structure.
 730  * @param wait_to_complete
 731  *   Wait for request completion (ignored).
 732  */
 733 static int
 734 mlx5_link_update_unlocked_gset(struct rte_eth_dev *dev, int wait_to_complete)
 735 {
 736         struct priv *priv = dev->data->dev_private;
 737         struct ethtool_cmd edata = {
 738                 .cmd = ETHTOOL_GSET /* Deprecated since Linux v4.5. */
 739         };
 740         struct ifreq ifr;
 741         struct rte_eth_link dev_link;
 742         int link_speed = 0;
 743
 744         /* priv_lock() is not taken to allow concurrent calls. */
 745
 746         (void)wait_to_complete;
 747         if (priv_ifreq(priv, SIOCGIFFLAGS, &ifr)) {
 748                 WARN("ioctl(SIOCGIFFLAGS) failed: %s", strerror(errno));
 749                 return -1;
 750         }
 751         memset(&dev_link, 0, sizeof(dev_link));
 752         dev_link.link_status = ((ifr.ifr_flags & IFF_UP) &&
 753                                 (ifr.ifr_flags & IFF_RUNNING));
 754         ifr.ifr_data = (void *)&edata;
 755         if (priv_ifreq(priv, SIOCETHTOOL, &ifr)) {
 756                 WARN("ioctl(SIOCETHTOOL, ETHTOOL_GSET) failed: %s",
 757                      strerror(errno));
 758                 return -1;
 759         }
 760         link_speed = ethtool_cmd_speed(&edata);
 761         if (link_speed == -1)
 762                 dev_link.link_speed = 0;
 763         else
 764                 dev_link.link_speed = link_speed;
 765         priv->link_speed_capa = 0;
 766         if (edata.supported & SUPPORTED_Autoneg)
 767                 priv->link_speed_capa |= ETH_LINK_SPEED_AUTONEG;
 768         if (edata.supported & (SUPPORTED_1000baseT_Full |
 769                                SUPPORTED_1000baseKX_Full))
 770                 priv->link_speed_capa |= ETH_LINK_SPEED_1G;
 771         if (edata.supported & SUPPORTED_10000baseKR_Full)
 772                 priv->link_speed_capa |= ETH_LINK_SPEED_10G;
 773         if (edata.supported & (SUPPORTED_40000baseKR4_Full |
 774                                SUPPORTED_40000baseCR4_Full |
 775                                SUPPORTED_40000baseSR4_Full |
 776                                SUPPORTED_40000baseLR4_Full))
 777                 priv->link_speed_capa |= ETH_LINK_SPEED_40G;
 778         dev_link.link_duplex = ((edata.duplex == DUPLEX_HALF) ?
 779                                 ETH_LINK_HALF_DUPLEX : ETH_LINK_FULL_DUPLEX);
 780         dev_link.link_autoneg = !(dev->data->dev_conf.link_speeds &
 781                         ETH_LINK_SPEED_FIXED);
 782         if (memcmp(&dev_link, &dev->data->dev_link, sizeof(dev_link))) {
 783                 /* Link status changed. */
 784                 dev->data->dev_link = dev_link;
 785                 return 0;
 786         }
 787         /* Link status is still the same. */
 788         return -1;
 789 }
 790
 791 /**
 792  * Retrieve physical link information (unlocked version using new ioctl).
 793  *
 794  * @param dev
 795  *   Pointer to Ethernet device structure.
 796  * @param wait_to_complete
 797  *   Wait for request completion (ignored).
 798  */
 799 static int
 800 mlx5_link_update_unlocked_gs(struct rte_eth_dev *dev, int wait_to_complete)
 801 {
 802         struct priv *priv = dev->data->dev_private;
 803         struct ethtool_link_settings gcmd = { .cmd = ETHTOOL_GLINKSETTINGS };
 804         struct ifreq ifr;
 805         struct rte_eth_link dev_link;
 806         uint64_t sc;
 807
 808         (void)wait_to_complete;
 809         if (priv_ifreq(priv, SIOCGIFFLAGS, &ifr)) {
 810                 WARN("ioctl(SIOCGIFFLAGS) failed: %s", strerror(errno));
 811                 return -1;
 812         }
 813         memset(&dev_link, 0, sizeof(dev_link));
 814         dev_link.link_status = ((ifr.ifr_flags & IFF_UP) &&
 815                                 (ifr.ifr_flags & IFF_RUNNING));
 816         ifr.ifr_data = (void *)&gcmd;
 817         if (priv_ifreq(priv, SIOCETHTOOL, &ifr)) {
 818                 DEBUG("ioctl(SIOCETHTOOL, ETHTOOL_GLINKSETTINGS) failed: %s",
 819                       strerror(errno));
 820                 return -1;
 821         }
 822         gcmd.link_mode_masks_nwords = -gcmd.link_mode_masks_nwords;
 823
 824         alignas(struct ethtool_link_settings)
 825         uint8_t data[offsetof(struct ethtool_link_settings, link_mode_masks) +
 826                      sizeof(uint32_t) * gcmd.link_mode_masks_nwords * 3];
 827         struct ethtool_link_settings *ecmd = (void *)data;
 828
 829         *ecmd = gcmd;
 830         ifr.ifr_data = (void *)ecmd;
 831         if (priv_ifreq(priv, SIOCETHTOOL, &ifr)) {
 832                 DEBUG("ioctl(SIOCETHTOOL, ETHTOOL_GLINKSETTINGS) failed: %s",
 833                       strerror(errno));
 834                 return -1;
 835         }
 836         dev_link.link_speed = ecmd->speed;
 837         sc = ecmd->link_mode_masks[0] |
 838                 ((uint64_t)ecmd->link_mode_masks[1] << 32);
 839         priv->link_speed_capa = 0;
 840         if (sc & MLX5_BITSHIFT(ETHTOOL_LINK_MODE_Autoneg_BIT))
 841                 priv->link_speed_capa |= ETH_LINK_SPEED_AUTONEG;
 842         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_1000baseT_Full_BIT) |
 843                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_1000baseKX_Full_BIT)))
 844                 priv->link_speed_capa |= ETH_LINK_SPEED_1G;
 845         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT) |
 846                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT) |
 847                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_10000baseR_FEC_BIT)))
 848                 priv->link_speed_capa |= ETH_LINK_SPEED_10G;
 849         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_20000baseMLD2_Full_BIT) |
 850                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_20000baseKR2_Full_BIT)))
 851                 priv->link_speed_capa |= ETH_LINK_SPEED_20G;
 852         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT) |
 853                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT) |
 854                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT) |
 855                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT)))
 856                 priv->link_speed_capa |= ETH_LINK_SPEED_40G;
 857         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_56000baseKR4_Full_BIT) |
 858                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_56000baseCR4_Full_BIT) |
 859                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_56000baseSR4_Full_BIT) |
 860                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_56000baseLR4_Full_BIT)))
 861                 priv->link_speed_capa |= ETH_LINK_SPEED_56G;
 862         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_25000baseCR_Full_BIT) |
 863                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_25000baseKR_Full_BIT) |
 864                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_25000baseSR_Full_BIT)))
 865                 priv->link_speed_capa |= ETH_LINK_SPEED_25G;
 866         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT) |
 867                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT)))
 868                 priv->link_speed_capa |= ETH_LINK_SPEED_50G;
 869         if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT) |
 870                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT) |
 871                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT) |
 872                   MLX5_BITSHIFT(ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT)))
 873                 priv->link_speed_capa |= ETH_LINK_SPEED_100G;
 874         dev_link.link_duplex = ((ecmd->duplex == DUPLEX_HALF) ?
 875                                 ETH_LINK_HALF_DUPLEX : ETH_LINK_FULL_DUPLEX);
 876         dev_link.link_autoneg = !(dev->data->dev_conf.link_speeds &
 877                                   ETH_LINK_SPEED_FIXED);
 878         if (memcmp(&dev_link, &dev->data->dev_link, sizeof(dev_link))) {
 879                 /* Link status changed. */
 880                 dev->data->dev_link = dev_link;
 881                 return 0;
 882         }
 883         /* Link status is still the same. */
 884         return -1;
 885 }
 886
 887 /**
 888  * DPDK callback to retrieve physical link information.
 889  *
 890  * @param dev
 891  *   Pointer to Ethernet device structure.
 892  * @param wait_to_complete
 893  *   Wait for request completion (ignored).
 894  */
 895 int
 896 mlx5_link_update(struct rte_eth_dev *dev, int wait_to_complete)
 897 {
 898         struct utsname utsname;
 899         int ver[3];
 900
 901         if (uname(&utsname) == -1 ||
 902             sscanf(utsname.release, "%d.%d.%d",
 903                    &ver[0], &ver[1], &ver[2]) != 3 ||
 904             KERNEL_VERSION(ver[0], ver[1], ver[2]) < KERNEL_VERSION(4, 9, 0))
 905                 return mlx5_link_update_unlocked_gset(dev, wait_to_complete);
 906         return mlx5_link_update_unlocked_gs(dev, wait_to_complete);
 907 }
 908
 909 /**
 910  * DPDK callback to change the MTU.
 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         uint16_t kern_mtu;
 925         int ret = 0;
 926
 927         priv_lock(priv);
 928         ret = priv_get_mtu(priv, &kern_mtu);
 929         if (ret)
 930                 goto out;
 931         /* Set kernel interface MTU first. */
 932         ret = priv_set_mtu(priv, mtu);
 933         if (ret)
 934                 goto out;
 935         ret = priv_get_mtu(priv, &kern_mtu);
 936         if (ret)
 937                 goto out;
 938         if (kern_mtu == mtu) {
 939                 priv->mtu = mtu;
 940                 DEBUG("adapter port %u MTU set to %u", priv->port, mtu);
 941         }
 942         priv_unlock(priv);
 943         return 0;
 944 out:
 945         ret = errno;
 946         WARN("cannot set port %u MTU to %u: %s", priv->port, mtu,
 947              strerror(ret));
 948         priv_unlock(priv);
 949         assert(ret >= 0);
 950         return -ret;
 951 }
 952
 953 /**
 954  * DPDK callback to get flow control status.
 955  *
 956  * @param dev
 957  *   Pointer to Ethernet device structure.
 958  * @param[out] fc_conf
 959  *   Flow control output buffer.
 960  *
 961  * @return
 962  *   0 on success, negative errno value on failure.
 963  */
 964 int
 965 mlx5_dev_get_flow_ctrl(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
 966 {
 967         struct priv *priv = dev->data->dev_private;
 968         struct ifreq ifr;
 969         struct ethtool_pauseparam ethpause = {
 970                 .cmd = ETHTOOL_GPAUSEPARAM
 971         };
 972         int ret;
 973
 974         ifr.ifr_data = (void *)&ethpause;
 975         priv_lock(priv);
 976         if (priv_ifreq(priv, SIOCETHTOOL, &ifr)) {
 977                 ret = errno;
 978                 WARN("ioctl(SIOCETHTOOL, ETHTOOL_GPAUSEPARAM)"
 979                      " failed: %s",
 980                      strerror(ret));
 981                 goto out;
 982         }
 983
 984         fc_conf->autoneg = ethpause.autoneg;
 985         if (ethpause.rx_pause && ethpause.tx_pause)
 986                 fc_conf->mode = RTE_FC_FULL;
 987         else if (ethpause.rx_pause)
 988                 fc_conf->mode = RTE_FC_RX_PAUSE;
 989         else if (ethpause.tx_pause)
 990                 fc_conf->mode = RTE_FC_TX_PAUSE;
 991         else
 992                 fc_conf->mode = RTE_FC_NONE;
 993         ret = 0;
 994
 995 out:
 996         priv_unlock(priv);
 997         assert(ret >= 0);
 998         return -ret;
 999 }
1000
1001 /**
1002  * DPDK callback to modify flow control parameters.
1003  *
1004  * @param dev
1005  *   Pointer to Ethernet device structure.
1006  * @param[in] fc_conf
1007  *   Flow control parameters.
1008  *
1009  * @return
1010  *   0 on success, negative errno value on failure.
1011  */
1012 int
1013 mlx5_dev_set_flow_ctrl(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
1014 {
1015         struct priv *priv = dev->data->dev_private;
1016         struct ifreq ifr;
1017         struct ethtool_pauseparam ethpause = {
1018                 .cmd = ETHTOOL_SPAUSEPARAM
1019         };
1020         int ret;
1021
1022         ifr.ifr_data = (void *)&ethpause;
1023         ethpause.autoneg = fc_conf->autoneg;
1024         if (((fc_conf->mode & RTE_FC_FULL) == RTE_FC_FULL) ||
1025             (fc_conf->mode & RTE_FC_RX_PAUSE))
1026                 ethpause.rx_pause = 1;
1027         else
1028                 ethpause.rx_pause = 0;
1029
1030         if (((fc_conf->mode & RTE_FC_FULL) == RTE_FC_FULL) ||
1031             (fc_conf->mode & RTE_FC_TX_PAUSE))
1032                 ethpause.tx_pause = 1;
1033         else
1034                 ethpause.tx_pause = 0;
1035
1036         priv_lock(priv);
1037         if (priv_ifreq(priv, SIOCETHTOOL, &ifr)) {
1038                 ret = errno;
1039                 WARN("ioctl(SIOCETHTOOL, ETHTOOL_SPAUSEPARAM)"
1040                      " failed: %s",
1041                      strerror(ret));
1042                 goto out;
1043         }
1044         ret = 0;
1045
1046 out:
1047         priv_unlock(priv);
1048         assert(ret >= 0);
1049         return -ret;
1050 }
1051
1052 /**
1053  * Get PCI information from struct ibv_device.
1054  *
1055  * @param device
1056  *   Pointer to Ethernet device structure.
1057  * @param[out] pci_addr
1058  *   PCI bus address output buffer.
1059  *
1060  * @return
1061  *   0 on success, -1 on failure and errno is set.
1062  */
1063 int
1064 mlx5_ibv_device_to_pci_addr(const struct ibv_device *device,
1065                             struct rte_pci_addr *pci_addr)
1066 {
1067         FILE *file;
1068         char line[32];
1069         MKSTR(path, "%s/device/uevent", device->ibdev_path);
1070
1071         file = fopen(path, "rb");
1072         if (file == NULL)
1073                 return -1;
1074         while (fgets(line, sizeof(line), file) == line) {
1075                 size_t len = strlen(line);
1076                 int ret;
1077
1078                 /* Truncate long lines. */
1079                 if (len == (sizeof(line) - 1))
1080                         while (line[(len - 1)] != '\n') {
1081                                 ret = fgetc(file);
1082                                 if (ret == EOF)
1083                                         break;
1084                                 line[(len - 1)] = ret;
1085                         }
1086                 /* Extract information. */
1087                 if (sscanf(line,
1088                            "PCI_SLOT_NAME="
1089                            "%" SCNx32 ":%" SCNx8 ":%" SCNx8 ".%" SCNx8 "\n",
1090                            &pci_addr->domain,
1091                            &pci_addr->bus,
1092                            &pci_addr->devid,
1093                            &pci_addr->function) == 4) {
1094                         ret = 0;
1095                         break;
1096                 }
1097         }
1098         fclose(file);
1099         return 0;
1100 }
1101
1102 /**
1103  * Update the link status.
1104  *
1105  * @param priv
1106  *   Pointer to private structure.
1107  *
1108  * @return
1109  *   Zero if the callback process can be called immediately.
1110  */
1111 static int
1112 priv_link_status_update(struct priv *priv)
1113 {
1114         struct rte_eth_link *link = &priv->dev->data->dev_link;
1115
1116         mlx5_link_update(priv->dev, 0);
1117         if (((link->link_speed == 0) && link->link_status) ||
1118                 ((link->link_speed != 0) && !link->link_status)) {
1119                 /*
1120                  * Inconsistent status. Event likely occurred before the
1121                  * kernel netdevice exposes the new status.
1122                  */
1123                 if (!priv->pending_alarm) {
1124                         priv->pending_alarm = 1;
1125                         rte_eal_alarm_set(MLX5_ALARM_TIMEOUT_US,
1126                                           mlx5_dev_link_status_handler,
1127                                           priv->dev);
1128                 }
1129                 return 1;
1130         } else if (unlikely(priv->pending_alarm)) {
1131                 /* Link interrupt occurred while alarm is already scheduled. */
1132                 priv->pending_alarm = 0;
1133                 rte_eal_alarm_cancel(mlx5_dev_link_status_handler, priv->dev);
1134         }
1135         return 0;
1136 }
1137
1138 /**
1139  * Device status handler.
1140  *
1141  * @param priv
1142  *   Pointer to private structure.
1143  * @param events
1144  *   Pointer to event flags holder.
1145  *
1146  * @return
1147  *   Events bitmap of callback process which can be called immediately.
1148  */
1149 static uint32_t
1150 priv_dev_status_handler(struct priv *priv)
1151 {
1152         struct ibv_async_event event;
1153         uint32_t ret = 0;
1154
1155         /* Read all message and acknowledge them. */
1156         for (;;) {
1157                 if (ibv_get_async_event(priv->ctx, &event))
1158                         break;
1159                 if ((event.event_type == IBV_EVENT_PORT_ACTIVE ||
1160                         event.event_type == IBV_EVENT_PORT_ERR) &&
1161                         (priv->dev->data->dev_conf.intr_conf.lsc == 1))
1162                         ret |= (1 << RTE_ETH_EVENT_INTR_LSC);
1163                 else if (event.event_type == IBV_EVENT_DEVICE_FATAL &&
1164                         priv->dev->data->dev_conf.intr_conf.rmv == 1)
1165                         ret |= (1 << RTE_ETH_EVENT_INTR_RMV);
1166                 else
1167                         DEBUG("event type %d on port %d not handled",
1168                               event.event_type, event.element.port_num);
1169                 ibv_ack_async_event(&event);
1170         }
1171         if (ret & (1 << RTE_ETH_EVENT_INTR_LSC))
1172                 if (priv_link_status_update(priv))
1173                         ret &= ~(1 << RTE_ETH_EVENT_INTR_LSC);
1174         return ret;
1175 }
1176
1177 /**
1178  * Handle delayed link status event.
1179  *
1180  * @param arg
1181  *   Registered argument.
1182  */
1183 void
1184 mlx5_dev_link_status_handler(void *arg)
1185 {
1186         struct rte_eth_dev *dev = arg;
1187         struct priv *priv = dev->data->dev_private;
1188         int ret;
1189
1190         priv_lock(priv);
1191         assert(priv->pending_alarm == 1);
1192         priv->pending_alarm = 0;
1193         ret = priv_link_status_update(priv);
1194         priv_unlock(priv);
1195         if (!ret)
1196                 _rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL,
1197                                               NULL);
1198 }
1199
1200 /**
1201  * Handle interrupts from the NIC.
1202  *
1203  * @param[in] intr_handle
1204  *   Interrupt handler.
1205  * @param cb_arg
1206  *   Callback argument.
1207  */
1208 void
1209 mlx5_dev_interrupt_handler(void *cb_arg)
1210 {
1211         struct rte_eth_dev *dev = cb_arg;
1212         struct priv *priv = dev->data->dev_private;
1213         uint32_t events;
1214
1215         priv_lock(priv);
1216         events = priv_dev_status_handler(priv);
1217         priv_unlock(priv);
1218         if (events & (1 << RTE_ETH_EVENT_INTR_LSC))
1219                 _rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL,
1220                                               NULL);
1221         if (events & (1 << RTE_ETH_EVENT_INTR_RMV))
1222                 _rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_RMV, NULL,
1223                                               NULL);
1224 }
1225
1226 /**
1227  * Handle interrupts from the socket.
1228  *
1229  * @param cb_arg
1230  *   Callback argument.
1231  */
1232 static void
1233 mlx5_dev_handler_socket(void *cb_arg)
1234 {
1235         struct rte_eth_dev *dev = cb_arg;
1236         struct priv *priv = dev->data->dev_private;
1237
1238         priv_lock(priv);
1239         priv_socket_handle(priv);
1240         priv_unlock(priv);
1241 }
1242
1243 /**
1244  * Uninstall interrupt handler.
1245  *
1246  * @param priv
1247  *   Pointer to private structure.
1248  * @param dev
1249  *   Pointer to the rte_eth_dev structure.
1250  */
1251 void
1252 priv_dev_interrupt_handler_uninstall(struct priv *priv, struct rte_eth_dev *dev)
1253 {
1254         if (dev->data->dev_conf.intr_conf.lsc ||
1255             dev->data->dev_conf.intr_conf.rmv)
1256                 rte_intr_callback_unregister(&priv->intr_handle,
1257                                              mlx5_dev_interrupt_handler, dev);
1258         if (priv->primary_socket)
1259                 rte_intr_callback_unregister(&priv->intr_handle_socket,
1260                                              mlx5_dev_handler_socket, dev);
1261         if (priv->pending_alarm)
1262                 rte_eal_alarm_cancel(mlx5_dev_link_status_handler, dev);
1263         priv->pending_alarm = 0;
1264         priv->intr_handle.fd = 0;
1265         priv->intr_handle.type = RTE_INTR_HANDLE_UNKNOWN;
1266         priv->intr_handle_socket.fd = 0;
1267         priv->intr_handle_socket.type = RTE_INTR_HANDLE_UNKNOWN;
1268 }
1269
1270 /**
1271  * Install interrupt handler.
1272  *
1273  * @param priv
1274  *   Pointer to private structure.
1275  * @param dev
1276  *   Pointer to the rte_eth_dev structure.
1277  */
1278 void
1279 priv_dev_interrupt_handler_install(struct priv *priv, struct rte_eth_dev *dev)
1280 {
1281         int rc, flags;
1282
1283         assert(priv->ctx->async_fd > 0);
1284         flags = fcntl(priv->ctx->async_fd, F_GETFL);
1285         rc = fcntl(priv->ctx->async_fd, F_SETFL, flags | O_NONBLOCK);
1286         if (rc < 0) {
1287                 INFO("failed to change file descriptor async event queue");
1288                 dev->data->dev_conf.intr_conf.lsc = 0;
1289                 dev->data->dev_conf.intr_conf.rmv = 0;
1290         }
1291         if (dev->data->dev_conf.intr_conf.lsc ||
1292             dev->data->dev_conf.intr_conf.rmv) {
1293                 priv->intr_handle.fd = priv->ctx->async_fd;
1294                 priv->intr_handle.type = RTE_INTR_HANDLE_EXT;
1295                 rte_intr_callback_register(&priv->intr_handle,
1296                                            mlx5_dev_interrupt_handler, dev);
1297         }
1298
1299         rc = priv_socket_init(priv);
1300         if (!rc && priv->primary_socket) {
1301                 priv->intr_handle_socket.fd = priv->primary_socket;
1302                 priv->intr_handle_socket.type = RTE_INTR_HANDLE_EXT;
1303                 rte_intr_callback_register(&priv->intr_handle_socket,
1304                                            mlx5_dev_handler_socket, dev);
1305         }
1306 }
1307
1308 /**
1309  * Change the link state (UP / DOWN).
1310  *
1311  * @param priv
1312  *   Pointer to private data structure.
1313  * @param dev
1314  *   Pointer to rte_eth_dev structure.
1315  * @param up
1316  *   Nonzero for link up, otherwise link down.
1317  *
1318  * @return
1319  *   0 on success, errno value on failure.
1320  */
1321 static int
1322 priv_dev_set_link(struct priv *priv, struct rte_eth_dev *dev, int up)
1323 {
1324         int err;
1325
1326         if (up) {
1327                 err = priv_set_flags(priv, ~IFF_UP, IFF_UP);
1328                 if (err)
1329                         return err;
1330                 dev->tx_pkt_burst = priv_select_tx_function(priv, dev);
1331                 dev->rx_pkt_burst = priv_select_rx_function(priv, dev);
1332         } else {
1333                 err = priv_set_flags(priv, ~IFF_UP, ~IFF_UP);
1334                 if (err)
1335                         return err;
1336                 dev->rx_pkt_burst = removed_rx_burst;
1337                 dev->tx_pkt_burst = removed_tx_burst;
1338         }
1339         return 0;
1340 }
1341
1342 /**
1343  * DPDK callback to bring the link DOWN.
1344  *
1345  * @param dev
1346  *   Pointer to Ethernet device structure.
1347  *
1348  * @return
1349  *   0 on success, errno value on failure.
1350  */
1351 int
1352 mlx5_set_link_down(struct rte_eth_dev *dev)
1353 {
1354         struct priv *priv = dev->data->dev_private;
1355         int err;
1356
1357         priv_lock(priv);
1358         err = priv_dev_set_link(priv, dev, 0);
1359         priv_unlock(priv);
1360         return err;
1361 }
1362
1363 /**
1364  * DPDK callback to bring the link UP.
1365  *
1366  * @param dev
1367  *   Pointer to Ethernet device structure.
1368  *
1369  * @return
1370  *   0 on success, errno value on failure.
1371  */
1372 int
1373 mlx5_set_link_up(struct rte_eth_dev *dev)
1374 {
1375         struct priv *priv = dev->data->dev_private;
1376         int err;
1377
1378         priv_lock(priv);
1379         err = priv_dev_set_link(priv, dev, 1);
1380         priv_unlock(priv);
1381         return err;
1382 }
1383
1384 /**
1385  * Configure the TX function to use.
1386  *
1387  * @param priv
1388  *   Pointer to private data structure.
1389  * @param dev
1390  *   Pointer to rte_eth_dev structure.
1391  *
1392  * @return
1393  *   Pointer to selected Tx burst function.
1394  */
1395 eth_tx_burst_t
1396 priv_select_tx_function(struct priv *priv, struct rte_eth_dev *dev)
1397 {
1398         eth_tx_burst_t tx_pkt_burst = mlx5_tx_burst;
1399         struct mlx5_dev_config *config = &priv->config;
1400         uint64_t tx_offloads = dev->data->dev_conf.txmode.offloads;
1401         int tso = !!(tx_offloads & (DEV_TX_OFFLOAD_TCP_TSO |
1402                                     DEV_TX_OFFLOAD_VXLAN_TNL_TSO |
1403                                     DEV_TX_OFFLOAD_GRE_TNL_TSO));
1404         int vlan_insert = !!(tx_offloads & DEV_TX_OFFLOAD_VLAN_INSERT);
1405
1406         assert(priv != NULL);
1407         /* Select appropriate TX function. */
1408         if (vlan_insert || tso)
1409                 return tx_pkt_burst;
1410         if (config->mps == MLX5_MPW_ENHANCED) {
1411                 if (priv_check_vec_tx_support(priv, dev) > 0) {
1412                         if (priv_check_raw_vec_tx_support(priv, dev) > 0)
1413                                 tx_pkt_burst = mlx5_tx_burst_raw_vec;
1414                         else
1415                                 tx_pkt_burst = mlx5_tx_burst_vec;
1416                         DEBUG("selected Enhanced MPW TX vectorized function");
1417                 } else {
1418                         tx_pkt_burst = mlx5_tx_burst_empw;
1419                         DEBUG("selected Enhanced MPW TX function");
1420                 }
1421         } else if (config->mps && (config->txq_inline > 0)) {
1422                 tx_pkt_burst = mlx5_tx_burst_mpw_inline;
1423                 DEBUG("selected MPW inline TX function");
1424         } else if (config->mps) {
1425                 tx_pkt_burst = mlx5_tx_burst_mpw;
1426                 DEBUG("selected MPW TX function");
1427         }
1428         return tx_pkt_burst;
1429 }
1430
1431 /**
1432  * Configure the RX function to use.
1433  *
1434  * @param priv
1435  *   Pointer to private data structure.
1436  * @param dev
1437  *   Pointer to rte_eth_dev structure.
1438  *
1439  * @return
1440  *   Pointer to selected Rx burst function.
1441  */
1442 eth_rx_burst_t
1443 priv_select_rx_function(struct priv *priv, __rte_unused struct rte_eth_dev *dev)
1444 {
1445         eth_rx_burst_t rx_pkt_burst = mlx5_rx_burst;
1446
1447         assert(priv != NULL);
1448         if (priv_check_vec_rx_support(priv) > 0) {
1449                 rx_pkt_burst = mlx5_rx_burst_vec;
1450                 DEBUG("selected RX vectorized function");
1451         }
1452         return rx_pkt_burst;
1453 }