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 #include <stddef.h>
  35 #include <assert.h>
  36 #include <unistd.h>
  37 #include <stdint.h>
  38 #include <stdio.h>
  39 #include <string.h>
  40 #include <stdlib.h>
  41 #include <errno.h>
  42 #include <dirent.h>
  43 #include <net/if.h>
  44 #include <sys/ioctl.h>
  45 #include <sys/socket.h>
  46 #include <sys/utsname.h>
  47 #include <netinet/in.h>
  48 #include <linux/ethtool.h>
  49 #include <linux/sockios.h>
  50 #include <linux/version.h>
  51 #include <fcntl.h>
  52
  53 /* DPDK headers don't like -pedantic. */
  54 #ifdef PEDANTIC
  55 #pragma GCC diagnostic ignored "-Wpedantic"
  56 #endif
  57 #include <rte_atomic.h>
  58 #include <rte_ethdev.h>
  59 #include <rte_mbuf.h>
  60 #include <rte_common.h>
  61 #include <rte_interrupts.h>
  62 #include <rte_alarm.h>
  63 #include <rte_malloc.h>
  64 #ifdef PEDANTIC
  65 #pragma GCC diagnostic error "-Wpedantic"
  66 #endif
  67
  68 #include "mlx5.h"
  69 #include "mlx5_rxtx.h"
  70 #include "mlx5_utils.h"
  71
  72 /* Add defines in case the running kernel is not the same as user headers. */
  73 #ifndef ETHTOOL_GLINKSETTINGS
  74 struct ethtool_link_settings {
  75         uint32_t cmd;
  76         uint32_t speed;
  77         uint8_t duplex;
  78         uint8_t port;
  79         uint8_t phy_address;
  80         uint8_t autoneg;
  81         uint8_t mdio_support;
  82         uint8_t eth_to_mdix;
  83         uint8_t eth_tp_mdix_ctrl;
  84         int8_t link_mode_masks_nwords;
  85         uint32_t reserved[8];
  86         uint32_t link_mode_masks[];
  87 };
  88
  89 #define ETHTOOL_GLINKSETTINGS 0x0000004c
  90 #define ETHTOOL_LINK_MODE_1000baseT_Full_BIT 5
  91 #define ETHTOOL_LINK_MODE_Autoneg_BIT 6
  92 #define ETHTOOL_LINK_MODE_1000baseKX_Full_BIT 17
  93 #define ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT 18
  94 #define ETHTOOL_LINK_MODE_10000baseKR_Full_BIT 19
  95 #define ETHTOOL_LINK_MODE_10000baseR_FEC_BIT 20
  96 #define ETHTOOL_LINK_MODE_20000baseMLD2_Full_BIT 21
  97 #define ETHTOOL_LINK_MODE_20000baseKR2_Full_BIT 22
  98 #define ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT 23
  99 #define ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT 24
 100 #define ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT 25
 101 #define ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT 26
 102 #define ETHTOOL_LINK_MODE_56000baseKR4_Full_BIT 27
 103 #define ETHTOOL_LINK_MODE_56000baseCR4_Full_BIT 28
 104 #define ETHTOOL_LINK_MODE_56000baseSR4_Full_BIT 29
 105 #define ETHTOOL_LINK_MODE_56000baseLR4_Full_BIT 30
 106 #endif
 107 #ifndef HAVE_ETHTOOL_LINK_MODE_25G
 108 #define ETHTOOL_LINK_MODE_25000baseCR_Full_BIT 31
 109 #define ETHTOOL_LINK_MODE_25000baseKR_Full_BIT 32
 110 #define ETHTOOL_LINK_MODE_25000baseSR_Full_BIT 33
 111 #endif
 112 #ifndef HAVE_ETHTOOL_LINK_MODE_50G
 113 #define ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT 34
 114 #define ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT 35
 115 #endif
 116 #ifndef HAVE_ETHTOOL_LINK_MODE_100G
 117 #define ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT 36
 118 #define ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT 37
 119 #define ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT 38
 120 #define ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT 39
 121 #endif
 122 #define ETHTOOL_LINK_MODE_MASK_MAX_KERNEL_NU32 (SCHAR_MAX)
 123
 124 /**
 125  * Return private structure associated with an Ethernet device.
 126  *
 127  * @param dev
 128  *   Pointer to Ethernet device structure.
 129  *
 130  * @return
 131  *   Pointer to private structure.
 132  */
 133 struct priv *
 134 mlx5_get_priv(struct rte_eth_dev *dev)
 135 {
 136         struct mlx5_secondary_data *sd;
 137
 138         if (!mlx5_is_secondary())
 139                 return dev->data->dev_private;
 140         sd = &mlx5_secondary_data[dev->data->port_id];
 141         return sd->data.dev_private;
 142 }
 143
 144 /**
 145  * Check if running as a secondary process.
 146  *
 147  * @return
 148  *   Nonzero if running as a secondary process.
 149  */
 150 inline int
 151 mlx5_is_secondary(void)
 152 {
 153         return rte_eal_process_type() != RTE_PROC_PRIMARY;
 154 }
 155
 156 /**
 157  * Get interface name from private structure.
 158  *
 159  * @param[in] priv
 160  *   Pointer to private structure.
 161  * @param[out] ifname
 162  *   Interface name output buffer.
 163  *
 164  * @return
 165  *   0 on success, -1 on failure and errno is set.
 166  */
 167 int
 168 priv_get_ifname(const struct priv *priv, char (*ifname)[IF_NAMESIZE])
 169 {
 170         DIR *dir;
 171         struct dirent *dent;
 172         unsigned int dev_type = 0;
 173         unsigned int dev_port_prev = ~0u;
 174         char match[IF_NAMESIZE] = "";
 175
 176         {
 177                 MKSTR(path, "%s/device/net", priv->ctx->device->ibdev_path);
 178
 179                 dir = opendir(path);
 180                 if (dir == NULL)
 181                         return -1;
 182         }
 183         while ((dent = readdir(dir)) != NULL) {
 184                 char *name = dent->d_name;
 185                 FILE *file;
 186                 unsigned int dev_port;
 187                 int r;
 188
 189                 if ((name[0] == '.') &&
 190                     ((name[1] == '\0') ||
 191                      ((name[1] == '.') && (name[2] == '\0'))))
 192                         continue;
 193
 194                 MKSTR(path, "%s/device/net/%s/%s",
 195                       priv->ctx->device->ibdev_path, name,
 196                       (dev_type ? "dev_id" : "dev_port"));
 197
 198                 file = fopen(path, "rb");
 199                 if (file == NULL) {
 200                         if (errno != ENOENT)
 201                                 continue;
 202                         /*
 203                          * Switch to dev_id when dev_port does not exist as
 204                          * is the case with Linux kernel versions < 3.15.
 205                          */
 206 try_dev_id:
 207                         match[0] = '\0';
 208                         if (dev_type)
 209                                 break;
 210                         dev_type = 1;
 211                         dev_port_prev = ~0u;
 212                         rewinddir(dir);
 213                         continue;
 214                 }
 215                 r = fscanf(file, (dev_type ? "%x" : "%u"), &dev_port);
 216                 fclose(file);
 217                 if (r != 1)
 218                         continue;
 219                 /*
 220                  * Switch to dev_id when dev_port returns the same value for
 221                  * all ports. May happen when using a MOFED release older than
 222                  * 3.0 with a Linux kernel >= 3.15.
 223                  */
 224                 if (dev_port == dev_port_prev)
 225                         goto try_dev_id;
 226                 dev_port_prev = dev_port;
 227                 if (dev_port == (priv->port - 1u))
 228                         snprintf(match, sizeof(match), "%s", name);
 229         }
 230         closedir(dir);
 231         if (match[0] == '\0')
 232                 return -1;
 233         strncpy(*ifname, match, sizeof(*ifname));
 234         return 0;
 235 }
 236
 237 /**
 238  * Check if the counter is located on ib counters file.
 239  *
 240  * @param[in] cntr
 241  *   Counter name.
 242  *
 243  * @return
 244  *   1 if counter is located on ib counters file , 0 otherwise.
 245  */
 246 int
 247 priv_is_ib_cntr(const char *cntr)
 248 {
 249         if (!strcmp(cntr, "out_of_buffer"))
 250                 return 1;
 251         return 0;
 252 }
 253
 254 /**
 255  * Read from sysfs entry.
 256  *
 257  * @param[in] priv
 258  *   Pointer to private structure.
 259  * @param[in] entry
 260  *   Entry name relative to sysfs path.
 261  * @param[out] buf
 262  *   Data output buffer.
 263  * @param size
 264  *   Buffer size.
 265  *
 266  * @return
 267  *   0 on success, -1 on failure and errno is set.
 268  */
 269 static int
 270 priv_sysfs_read(const struct priv *priv, const char *entry,
 271                 char *buf, size_t size)
 272 {
 273         char ifname[IF_NAMESIZE];
 274         FILE *file;
 275         int ret;
 276         int err;
 277
 278         if (priv_get_ifname(priv, &ifname))
 279                 return -1;
 280
 281         if (priv_is_ib_cntr(entry)) {
 282                 MKSTR(path, "%s/ports/1/hw_counters/%s",
 283                       priv->ctx->device->ibdev_path, entry);
 284                 file = fopen(path, "rb");
 285         } else {
 286                 MKSTR(path, "%s/device/net/%s/%s",
 287                       priv->ctx->device->ibdev_path, ifname, entry);
 288                 file = fopen(path, "rb");
 289         }
 290         if (file == NULL)
 291                 return -1;
 292         ret = fread(buf, 1, size, file);
 293         err = errno;
 294         if (((size_t)ret < size) && (ferror(file)))
 295                 ret = -1;
 296         else
 297                 ret = size;
 298         fclose(file);
 299         errno = err;
 300         return ret;
 301 }
 302
 303 /**
 304  * Write to sysfs entry.
 305  *
 306  * @param[in] priv
 307  *   Pointer to private structure.
 308  * @param[in] entry
 309  *   Entry name relative to sysfs path.
 310  * @param[in] buf
 311  *   Data buffer.
 312  * @param size
 313  *   Buffer size.
 314  *
 315  * @return
 316  *   0 on success, -1 on failure and errno is set.
 317  */
 318 static int
 319 priv_sysfs_write(const struct priv *priv, const char *entry,
 320                  char *buf, size_t size)
 321 {
 322         char ifname[IF_NAMESIZE];
 323         FILE *file;
 324         int ret;
 325         int err;
 326
 327         if (priv_get_ifname(priv, &ifname))
 328                 return -1;
 329
 330         MKSTR(path, "%s/device/net/%s/%s", priv->ctx->device->ibdev_path,
 331               ifname, entry);
 332
 333         file = fopen(path, "wb");
 334         if (file == NULL)
 335                 return -1;
 336         ret = fwrite(buf, 1, size, file);
 337         err = errno;
 338         if (((size_t)ret < size) || (ferror(file)))
 339                 ret = -1;
 340         else
 341                 ret = size;
 342         fclose(file);
 343         errno = err;
 344         return ret;
 345 }
 346
 347 /**
 348  * Get unsigned long sysfs property.
 349  *
 350  * @param priv
 351  *   Pointer to private structure.
 352  * @param[in] name
 353  *   Entry name relative to sysfs path.
 354  * @param[out] value
 355  *   Value output buffer.
 356  *
 357  * @return
 358  *   0 on success, -1 on failure and errno is set.
 359  */
 360 static int
 361 priv_get_sysfs_ulong(struct priv *priv, const char *name, unsigned long *value)
 362 {
 363         int ret;
 364         unsigned long value_ret;
 365         char value_str[32];
 366
 367         ret = priv_sysfs_read(priv, name, value_str, (sizeof(value_str) - 1));
 368         if (ret == -1) {
 369                 DEBUG("cannot read %s value from sysfs: %s",
 370                       name, strerror(errno));
 371                 return -1;
 372         }
 373         value_str[ret] = '\0';
 374         errno = 0;
 375         value_ret = strtoul(value_str, NULL, 0);
 376         if (errno) {
 377                 DEBUG("invalid %s value `%s': %s", name, value_str,
 378                       strerror(errno));
 379                 return -1;
 380         }
 381         *value = value_ret;
 382         return 0;
 383 }
 384
 385 /**
 386  * Set unsigned long sysfs property.
 387  *
 388  * @param priv
 389  *   Pointer to private structure.
 390  * @param[in] name
 391  *   Entry name relative to sysfs path.
 392  * @param value
 393  *   Value to set.
 394  *
 395  * @return
 396  *   0 on success, -1 on failure and errno is set.
 397  */
 398 static int
 399 priv_set_sysfs_ulong(struct priv *priv, const char *name, unsigned long value)
 400 {
 401         int ret;
 402         MKSTR(value_str, "%lu", value);
 403
 404         ret = priv_sysfs_write(priv, name, value_str, (sizeof(value_str) - 1));
 405         if (ret == -1) {
 406                 DEBUG("cannot write %s `%s' (%lu) to sysfs: %s",
 407                       name, value_str, value, strerror(errno));
 408                 return -1;
 409         }
 410         return 0;
 411 }
 412
 413 /**
 414  * Perform ifreq ioctl() on associated Ethernet device.
 415  *
 416  * @param[in] priv
 417  *   Pointer to private structure.
 418  * @param req
 419  *   Request number to pass to ioctl().
 420  * @param[out] ifr
 421  *   Interface request structure output buffer.
 422  *
 423  * @return
 424  *   0 on success, -1 on failure and errno is set.
 425  */
 426 int
 427 priv_ifreq(const struct priv *priv, int req, struct ifreq *ifr)
 428 {
 429         int sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP);
 430         int ret = -1;
 431
 432         if (sock == -1)
 433                 return ret;
 434         if (priv_get_ifname(priv, &ifr->ifr_name) == 0)
 435                 ret = ioctl(sock, req, ifr);
 436         close(sock);
 437         return ret;
 438 }
 439
 440 /**
 441  * Return the number of active VFs for the current device.
 442  *
 443  * @param[in] priv
 444  *   Pointer to private structure.
 445  * @param[out] num_vfs
 446  *   Number of active VFs.
 447  *
 448  * @return
 449  *   0 on success, -1 on failure and errno is set.
 450  */
 451 int
 452 priv_get_num_vfs(struct priv *priv, uint16_t *num_vfs)
 453 {
 454         /* The sysfs entry name depends on the operating system. */
 455         const char **name = (const char *[]){
 456                 "device/sriov_numvfs",
 457                 "device/mlx5_num_vfs",
 458                 NULL,
 459         };
 460         int ret;
 461
 462         do {
 463                 unsigned long ulong_num_vfs;
 464
 465                 ret = priv_get_sysfs_ulong(priv, *name, &ulong_num_vfs);
 466                 if (!ret)
 467                         *num_vfs = ulong_num_vfs;
 468         } while (*(++name) && ret);
 469         return ret;
 470 }
 471
 472 /**
 473  * Get device MTU.
 474  *
 475  * @param priv
 476  *   Pointer to private structure.
 477  * @param[out] mtu
 478  *   MTU value output buffer.
 479  *
 480  * @return
 481  *   0 on success, -1 on failure and errno is set.
 482  */
 483 int
 484 priv_get_mtu(struct priv *priv, uint16_t *mtu)
 485 {
 486         unsigned long ulong_mtu;
 487
 488         if (priv_get_sysfs_ulong(priv, "mtu", &ulong_mtu) == -1)
 489                 return -1;
 490         *mtu = ulong_mtu;
 491         return 0;
 492 }
 493
 494 /**
 495  * Read device counter from sysfs.
 496  *
 497  * @param priv
 498  *   Pointer to private structure.
 499  * @param name
 500  *   Counter name.
 501  * @param[out] cntr
 502  *   Counter output buffer.
 503  *
 504  * @return
 505  *   0 on success, -1 on failure and errno is set.
 506  */
 507 int
 508 priv_get_cntr_sysfs(struct priv *priv, const char *name, uint64_t *cntr)
 509 {
 510         unsigned long ulong_ctr;
 511
 512         if (priv_get_sysfs_ulong(priv, name, &ulong_ctr) == -1)
 513                 return -1;
 514         *cntr = ulong_ctr;
 515         return 0;
 516 }
 517
 518 /**
 519  * Set device MTU.
 520  *
 521  * @param priv
 522  *   Pointer to private structure.
 523  * @param mtu
 524  *   MTU value to set.
 525  *
 526  * @return
 527  *   0 on success, -1 on failure and errno is set.
 528  */
 529 static int
 530 priv_set_mtu(struct priv *priv, uint16_t mtu)
 531 {
 532         uint16_t new_mtu;
 533
 534         if (priv_set_sysfs_ulong(priv, "mtu", mtu) ||
 535             priv_get_mtu(priv, &new_mtu))
 536                 return -1;
 537         if (new_mtu == mtu)
 538                 return 0;
 539         errno = EINVAL;
 540         return -1;
 541 }
 542
 543 /**
 544  * Set device flags.
 545  *
 546  * @param priv
 547  *   Pointer to private structure.
 548  * @param keep
 549  *   Bitmask for flags that must remain untouched.
 550  * @param flags
 551  *   Bitmask for flags to modify.
 552  *
 553  * @return
 554  *   0 on success, -1 on failure and errno is set.
 555  */
 556 int
 557 priv_set_flags(struct priv *priv, unsigned int keep, unsigned int flags)
 558 {
 559         unsigned long tmp;
 560
 561         if (priv_get_sysfs_ulong(priv, "flags", &tmp) == -1)
 562                 return -1;
 563         tmp &= keep;
 564         tmp |= (flags & (~keep));
 565         return priv_set_sysfs_ulong(priv, "flags", tmp);
 566 }
 567
 568 /**
 569  * Ethernet device configuration.
 570  *
 571  * Prepare the driver for a given number of TX and RX queues.
 572  *
 573  * @param dev
 574  *   Pointer to Ethernet device structure.
 575  *
 576  * @return
 577  *   0 on success, errno value on failure.
 578  */
 579 static int
 580 dev_configure(struct rte_eth_dev *dev)
 581 {
 582         struct priv *priv = dev->data->dev_private;
 583         unsigned int rxqs_n = dev->data->nb_rx_queues;
 584         unsigned int txqs_n = dev->data->nb_tx_queues;
 585         unsigned int i;
 586         unsigned int j;
 587         unsigned int reta_idx_n;
 588
 589         priv->rss_hf = dev->data->dev_conf.rx_adv_conf.rss_conf.rss_hf;
 590         priv->rxqs = (void *)dev->data->rx_queues;
 591         priv->txqs = (void *)dev->data->tx_queues;
 592         if (txqs_n != priv->txqs_n) {
 593                 INFO("%p: TX queues number update: %u -> %u",
 594                      (void *)dev, priv->txqs_n, txqs_n);
 595                 priv->txqs_n = txqs_n;
 596         }
 597         if (rxqs_n > priv->ind_table_max_size) {
 598                 ERROR("cannot handle this many RX queues (%u)", rxqs_n);
 599                 return EINVAL;
 600         }
 601         if (rxqs_n == priv->rxqs_n)
 602                 return 0;
 603         INFO("%p: RX queues number update: %u -> %u",
 604              (void *)dev, priv->rxqs_n, rxqs_n);
 605         priv->rxqs_n = rxqs_n;
 606         /* If the requested number of RX queues is not a power of two, use the
 607          * maximum indirection table size for better balancing.
 608          * The result is always rounded to the next power of two. */
 609         reta_idx_n = (1 << log2above((rxqs_n & (rxqs_n - 1)) ?
 610                                      priv->ind_table_max_size :
 611                                      rxqs_n));
 612         if (priv_rss_reta_index_resize(priv, reta_idx_n))
 613                 return ENOMEM;
 614         /* When the number of RX queues is not a power of two, the remaining
 615          * table entries are padded with reused WQs and hashes are not spread
 616          * uniformly. */
 617         for (i = 0, j = 0; (i != reta_idx_n); ++i) {
 618                 (*priv->reta_idx)[i] = j;
 619                 if (++j == rxqs_n)
 620                         j = 0;
 621         }
 622         return 0;
 623 }
 624
 625 /**
 626  * DPDK callback for Ethernet device configuration.
 627  *
 628  * @param dev
 629  *   Pointer to Ethernet device structure.
 630  *
 631  * @return
 632  *   0 on success, negative errno value on failure.
 633  */
 634 int
 635 mlx5_dev_configure(struct rte_eth_dev *dev)
 636 {
 637         struct priv *priv = dev->data->dev_private;
 638         int ret;
 639
 640         if (mlx5_is_secondary())
 641                 return -E_RTE_SECONDARY;
 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 = mlx5_get_priv(dev);
 662         unsigned int max;
 663         char ifname[IF_NAMESIZE];
 664
 665         info->pci_dev = RTE_ETH_DEV_TO_PCI(dev);
 666
 667         priv_lock(priv);
 668         /* FIXME: we should ask the device for these values. */
 669         info->min_rx_bufsize = 32;
 670         info->max_rx_pktlen = 65536;
 671         /*
 672          * Since we need one CQ per QP, the limit is the minimum number
 673          * between the two values.
 674          */
 675         max = ((priv->device_attr.max_cq > priv->device_attr.max_qp) ?
 676                priv->device_attr.max_qp : priv->device_attr.max_cq);
 677         /* If max >= 65535 then max = 0, max_rx_queues is uint16_t. */
 678         if (max >= 65535)
 679                 max = 65535;
 680         info->max_rx_queues = max;
 681         info->max_tx_queues = max;
 682         info->max_mac_addrs = RTE_DIM(priv->mac);
 683         info->rx_offload_capa =
 684                 (priv->hw_csum ?
 685                  (DEV_RX_OFFLOAD_IPV4_CKSUM |
 686                   DEV_RX_OFFLOAD_UDP_CKSUM |
 687                   DEV_RX_OFFLOAD_TCP_CKSUM) :
 688                  0) |
 689                 (priv->hw_vlan_strip ? DEV_RX_OFFLOAD_VLAN_STRIP : 0);
 690         if (!priv->mps)
 691                 info->tx_offload_capa = DEV_TX_OFFLOAD_VLAN_INSERT;
 692         if (priv->hw_csum)
 693                 info->tx_offload_capa |=
 694                         (DEV_TX_OFFLOAD_IPV4_CKSUM |
 695                          DEV_TX_OFFLOAD_UDP_CKSUM |
 696                          DEV_TX_OFFLOAD_TCP_CKSUM);
 697         if (priv->tso)
 698                 info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO;
 699         if (priv->tunnel_en)
 700                 info->tx_offload_capa |= (DEV_TX_OFFLOAD_OUTER_IPV4_CKSUM |
 701                                           DEV_TX_OFFLOAD_VXLAN_TNL_TSO |
 702                                           DEV_TX_OFFLOAD_GRE_TNL_TSO);
 703         if (priv_get_ifname(priv, &ifname) == 0)
 704                 info->if_index = if_nametoindex(ifname);
 705         info->reta_size = priv->reta_idx_n ?
 706                 priv->reta_idx_n : priv->ind_table_max_size;
 707         info->hash_key_size = ((*priv->rss_conf) ?
 708                                (*priv->rss_conf)[0]->rss_key_len :
 709                                0);
 710         info->speed_capa = priv->link_speed_capa;
 711         priv_unlock(priv);
 712 }
 713
 714 const uint32_t *
 715 mlx5_dev_supported_ptypes_get(struct rte_eth_dev *dev)
 716 {
 717         static const uint32_t ptypes[] = {
 718                 /* refers to rxq_cq_to_pkt_type() */
 719                 RTE_PTYPE_L3_IPV4_EXT_UNKNOWN,
 720                 RTE_PTYPE_L3_IPV6_EXT_UNKNOWN,
 721                 RTE_PTYPE_INNER_L3_IPV4_EXT_UNKNOWN,
 722                 RTE_PTYPE_INNER_L3_IPV6_EXT_UNKNOWN,
 723                 RTE_PTYPE_UNKNOWN
 724
 725         };
 726
 727         if (dev->rx_pkt_burst == mlx5_rx_burst ||
 728             dev->rx_pkt_burst == mlx5_rx_burst_vec)
 729                 return ptypes;
 730         return NULL;
 731 }
 732
 733 /**
 734  * DPDK callback to retrieve physical link information.
 735  *
 736  * @param dev
 737  *   Pointer to Ethernet device structure.
 738  * @param wait_to_complete
 739  *   Wait for request completion (ignored).
 740  */
 741 static int
 742 mlx5_link_update_unlocked_gset(struct rte_eth_dev *dev, int wait_to_complete)
 743 {
 744         struct priv *priv = mlx5_get_priv(dev);
 745         struct ethtool_cmd edata = {
 746                 .cmd = ETHTOOL_GSET /* Deprecated since Linux v4.5. */
 747         };
 748         struct ifreq ifr;
 749         struct rte_eth_link dev_link;
 750         int link_speed = 0;
 751
 752         /* priv_lock() is not taken to allow concurrent calls. */
 753
 754         (void)wait_to_complete;
 755         if (priv_ifreq(priv, SIOCGIFFLAGS, &ifr)) {
 756                 WARN("ioctl(SIOCGIFFLAGS) failed: %s", strerror(errno));
 757                 return -1;
 758         }
 759         memset(&dev_link, 0, sizeof(dev_link));
 760         dev_link.link_status = ((ifr.ifr_flags & IFF_UP) &&
 761                                 (ifr.ifr_flags & IFF_RUNNING));
 762         ifr.ifr_data = (void *)&edata;
 763         if (priv_ifreq(priv, SIOCETHTOOL, &ifr)) {
 764                 WARN("ioctl(SIOCETHTOOL, ETHTOOL_GSET) failed: %s",
 765                      strerror(errno));
 766                 return -1;
 767         }
 768         link_speed = ethtool_cmd_speed(&edata);
 769         if (link_speed == -1)
 770                 dev_link.link_speed = 0;
 771         else
 772                 dev_link.link_speed = link_speed;
 773         priv->link_speed_capa = 0;
 774         if (edata.supported & SUPPORTED_Autoneg)
 775                 priv->link_speed_capa |= ETH_LINK_SPEED_AUTONEG;
 776         if (edata.supported & (SUPPORTED_1000baseT_Full |
 777                                SUPPORTED_1000baseKX_Full))
 778                 priv->link_speed_capa |= ETH_LINK_SPEED_1G;
 779         if (edata.supported & SUPPORTED_10000baseKR_Full)
 780                 priv->link_speed_capa |= ETH_LINK_SPEED_10G;
 781         if (edata.supported & (SUPPORTED_40000baseKR4_Full |
 782                                SUPPORTED_40000baseCR4_Full |
 783                                SUPPORTED_40000baseSR4_Full |
 784                                SUPPORTED_40000baseLR4_Full))
 785                 priv->link_speed_capa |= ETH_LINK_SPEED_40G;
 786         dev_link.link_duplex = ((edata.duplex == DUPLEX_HALF) ?
 787                                 ETH_LINK_HALF_DUPLEX : ETH_LINK_FULL_DUPLEX);
 788         dev_link.link_autoneg = !(dev->data->dev_conf.link_speeds &
 789                         ETH_LINK_SPEED_FIXED);
 790         if (memcmp(&dev_link, &dev->data->dev_link, sizeof(dev_link))) {
 791                 /* Link status changed. */
 792                 dev->data->dev_link = dev_link;
 793                 return 0;
 794         }
 795         /* Link status is still the same. */
 796         return -1;
 797 }
 798
 799 /**
 800  * Retrieve physical link information (unlocked version using new ioctl).
 801  *
 802  * @param dev
 803  *   Pointer to Ethernet device structure.
 804  * @param wait_to_complete
 805  *   Wait for request completion (ignored).
 806  */
 807 static int
 808 mlx5_link_update_unlocked_gs(struct rte_eth_dev *dev, int wait_to_complete)
 809 {
 810         struct priv *priv = mlx5_get_priv(dev);
 811         __extension__ struct {
 812                 struct ethtool_link_settings edata;
 813                 uint32_t link_mode_data[3 *
 814                                         ETHTOOL_LINK_MODE_MASK_MAX_KERNEL_NU32];
 815         } ecmd;
 816
 817         struct ifreq ifr;
 818         struct rte_eth_link dev_link;
 819         uint64_t sc;
 820
 821         (void)wait_to_complete;
 822         if (priv_ifreq(priv, SIOCGIFFLAGS, &ifr)) {
 823                 WARN("ioctl(SIOCGIFFLAGS) failed: %s", strerror(errno));
 824                 return -1;
 825         }
 826         memset(&dev_link, 0, sizeof(dev_link));
 827         dev_link.link_status = ((ifr.ifr_flags & IFF_UP) &&
 828                                 (ifr.ifr_flags & IFF_RUNNING));
 829         memset(&ecmd, 0, sizeof(ecmd));
 830         ecmd.edata.cmd = ETHTOOL_GLINKSETTINGS;
 831         ifr.ifr_data = (void *)&ecmd;
 832         if (priv_ifreq(priv, SIOCETHTOOL, &ifr)) {
 833                 DEBUG("ioctl(SIOCETHTOOL, ETHTOOL_GLINKSETTINGS) failed: %s",
 834                       strerror(errno));
 835                 return -1;
 836         }
 837         ecmd.edata.link_mode_masks_nwords = -ecmd.edata.link_mode_masks_nwords;
 838         if (priv_ifreq(priv, SIOCETHTOOL, &ifr)) {
 839                 DEBUG("ioctl(SIOCETHTOOL, ETHTOOL_GLINKSETTINGS) failed: %s",
 840                       strerror(errno));
 841                 return -1;
 842         }
 843         dev_link.link_speed = ecmd.edata.speed;
 844         sc = ecmd.edata.link_mode_masks[0] |
 845                 ((uint64_t)ecmd.edata.link_mode_masks[1] << 32);
 846         priv->link_speed_capa = 0;
 847         if (sc & ETHTOOL_LINK_MODE_Autoneg_BIT)
 848                 priv->link_speed_capa |= ETH_LINK_SPEED_AUTONEG;
 849         if (sc & (ETHTOOL_LINK_MODE_1000baseT_Full_BIT |
 850                   ETHTOOL_LINK_MODE_1000baseKX_Full_BIT))
 851                 priv->link_speed_capa |= ETH_LINK_SPEED_1G;
 852         if (sc & (ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT |
 853                   ETHTOOL_LINK_MODE_10000baseKR_Full_BIT |
 854                   ETHTOOL_LINK_MODE_10000baseR_FEC_BIT))
 855                 priv->link_speed_capa |= ETH_LINK_SPEED_10G;
 856         if (sc & (ETHTOOL_LINK_MODE_20000baseMLD2_Full_BIT |
 857                   ETHTOOL_LINK_MODE_20000baseKR2_Full_BIT))
 858                 priv->link_speed_capa |= ETH_LINK_SPEED_20G;
 859         if (sc & (ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT |
 860                   ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT |
 861                   ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT |
 862                   ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT))
 863                 priv->link_speed_capa |= ETH_LINK_SPEED_40G;
 864         if (sc & (ETHTOOL_LINK_MODE_56000baseKR4_Full_BIT |
 865                   ETHTOOL_LINK_MODE_56000baseCR4_Full_BIT |
 866                   ETHTOOL_LINK_MODE_56000baseSR4_Full_BIT |
 867                   ETHTOOL_LINK_MODE_56000baseLR4_Full_BIT))
 868                 priv->link_speed_capa |= ETH_LINK_SPEED_56G;
 869         if (sc & (ETHTOOL_LINK_MODE_25000baseCR_Full_BIT |
 870                   ETHTOOL_LINK_MODE_25000baseKR_Full_BIT |
 871                   ETHTOOL_LINK_MODE_25000baseSR_Full_BIT))
 872                 priv->link_speed_capa |= ETH_LINK_SPEED_25G;
 873         if (sc & (ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT |
 874                   ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT))
 875                 priv->link_speed_capa |= ETH_LINK_SPEED_50G;
 876         if (sc & (ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT |
 877                   ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT |
 878                   ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT |
 879                   ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT))
 880                 priv->link_speed_capa |= ETH_LINK_SPEED_100G;
 881         dev_link.link_duplex = ((ecmd.edata.duplex == DUPLEX_HALF) ?
 882                                 ETH_LINK_HALF_DUPLEX : ETH_LINK_FULL_DUPLEX);
 883         dev_link.link_autoneg = !(dev->data->dev_conf.link_speeds &
 884                                   ETH_LINK_SPEED_FIXED);
 885         if (memcmp(&dev_link, &dev->data->dev_link, sizeof(dev_link))) {
 886                 /* Link status changed. */
 887                 dev->data->dev_link = dev_link;
 888                 return 0;
 889         }
 890         /* Link status is still the same. */
 891         return -1;
 892 }
 893
 894 /**
 895  * DPDK callback to retrieve physical link information.
 896  *
 897  * @param dev
 898  *   Pointer to Ethernet device structure.
 899  * @param wait_to_complete
 900  *   Wait for request completion (ignored).
 901  */
 902 int
 903 mlx5_link_update(struct rte_eth_dev *dev, int wait_to_complete)
 904 {
 905         struct utsname utsname;
 906         int ver[3];
 907
 908         if (uname(&utsname) == -1 ||
 909             sscanf(utsname.release, "%d.%d.%d",
 910                    &ver[0], &ver[1], &ver[2]) != 3 ||
 911             KERNEL_VERSION(ver[0], ver[1], ver[2]) < KERNEL_VERSION(4, 9, 0))
 912                 return mlx5_link_update_unlocked_gset(dev, wait_to_complete);
 913         return mlx5_link_update_unlocked_gs(dev, wait_to_complete);
 914 }
 915
 916 /**
 917  * DPDK callback to change the MTU.
 918  *
 919  * Setting the MTU affects hardware MRU (packets larger than the MTU cannot be
 920  * received). Use this as a hint to enable/disable scattered packets support
 921  * and improve performance when not needed.
 922  * Since failure is not an option, reconfiguring queues on the fly is not
 923  * recommended.
 924  *
 925  * @param dev
 926  *   Pointer to Ethernet device structure.
 927  * @param in_mtu
 928  *   New MTU.
 929  *
 930  * @return
 931  *   0 on success, negative errno value on failure.
 932  */
 933 int
 934 mlx5_dev_set_mtu(struct rte_eth_dev *dev, uint16_t mtu)
 935 {
 936         struct priv *priv = dev->data->dev_private;
 937         int ret = 0;
 938         unsigned int i;
 939         unsigned int max_frame_len;
 940         int rehash;
 941         int restart = priv->started;
 942
 943         if (mlx5_is_secondary())
 944                 return -E_RTE_SECONDARY;
 945
 946         priv_lock(priv);
 947         /* Set kernel interface MTU first. */
 948         if (priv_set_mtu(priv, mtu)) {
 949                 ret = errno;
 950                 WARN("cannot set port %u MTU to %u: %s", priv->port, mtu,
 951                      strerror(ret));
 952                 goto out;
 953         } else
 954                 DEBUG("adapter port %u MTU set to %u", priv->port, mtu);
 955         /* Temporarily replace RX handler with a fake one, assuming it has not
 956          * been copied elsewhere. */
 957         dev->rx_pkt_burst = removed_rx_burst;
 958         /* Make sure everyone has left dev->rx_pkt_burst() and uses
 959          * removed_rx_burst() instead. */
 960         rte_wmb();
 961         usleep(1000);
 962         /* MTU does not include header and CRC. */
 963         max_frame_len = ETHER_HDR_LEN + mtu + ETHER_CRC_LEN;
 964         /* Check if at least one queue is going to need a SGE update. */
 965         for (i = 0; i != priv->rxqs_n; ++i) {
 966                 struct rxq *rxq = (*priv->rxqs)[i];
 967                 unsigned int mb_len;
 968                 unsigned int size = RTE_PKTMBUF_HEADROOM + max_frame_len;
 969                 unsigned int sges_n;
 970
 971                 if (rxq == NULL)
 972                         continue;
 973                 mb_len = rte_pktmbuf_data_room_size(rxq->mp);
 974                 assert(mb_len >= RTE_PKTMBUF_HEADROOM);
 975                 /*
 976                  * Determine the number of SGEs needed for a full packet
 977                  * and round it to the next power of two.
 978                  */
 979                 sges_n = log2above((size / mb_len) + !!(size % mb_len));
 980                 if (sges_n != rxq->sges_n)
 981                         break;
 982         }
 983         /*
 984          * If all queues have the right number of SGEs, a simple rehash
 985          * of their buffers is enough, otherwise SGE information can only
 986          * be updated in a queue by recreating it. All resources that depend
 987          * on queues (flows, indirection tables) must be recreated as well in
 988          * that case.
 989          */
 990         rehash = (i == priv->rxqs_n);
 991         if (!rehash) {
 992                 /* Clean up everything as with mlx5_dev_stop(). */
 993                 priv_special_flow_disable_all(priv);
 994                 priv_mac_addrs_disable(priv);
 995                 priv_destroy_hash_rxqs(priv);
 996                 priv_fdir_disable(priv);
 997                 priv_dev_interrupt_handler_uninstall(priv, dev);
 998         }
 999 recover:
1000         /* Reconfigure each RX queue. */
1001         for (i = 0; (i != priv->rxqs_n); ++i) {
1002                 struct rxq *rxq = (*priv->rxqs)[i];
1003                 struct rxq_ctrl *rxq_ctrl =
1004                         container_of(rxq, struct rxq_ctrl, rxq);
1005                 unsigned int mb_len;
1006                 unsigned int tmp;
1007
1008                 if (rxq == NULL)
1009                         continue;
1010                 mb_len = rte_pktmbuf_data_room_size(rxq->mp);
1011                 assert(mb_len >= RTE_PKTMBUF_HEADROOM);
1012                 /* Provide new values to rxq_setup(). */
1013                 dev->data->dev_conf.rxmode.jumbo_frame =
1014                         (max_frame_len > ETHER_MAX_LEN);
1015                 dev->data->dev_conf.rxmode.max_rx_pkt_len = max_frame_len;
1016                 if (rehash)
1017                         ret = rxq_rehash(dev, rxq_ctrl);
1018                 else
1019                         ret = rxq_ctrl_setup(dev, rxq_ctrl, 1 << rxq->elts_n,
1020                                              rxq_ctrl->socket, NULL, rxq->mp);
1021                 if (!ret)
1022                         continue;
1023                 /* Attempt to roll back in case of error. */
1024                 tmp = (mb_len << rxq->sges_n) - RTE_PKTMBUF_HEADROOM;
1025                 if (max_frame_len != tmp) {
1026                         max_frame_len = tmp;
1027                         goto recover;
1028                 }
1029                 /* Double fault, disable RX. */
1030                 break;
1031         }
1032         /* Mimic mlx5_dev_start(). */
1033         if (ret) {
1034                 ERROR("unable to reconfigure RX queues, RX disabled");
1035         } else if (restart &&
1036                    !rehash &&
1037                    !priv_create_hash_rxqs(priv) &&
1038                    !priv_rehash_flows(priv)) {
1039                 if (dev->data->dev_conf.fdir_conf.mode == RTE_FDIR_MODE_NONE)
1040                         priv_fdir_enable(priv);
1041                 priv_dev_interrupt_handler_install(priv, dev);
1042         }
1043         priv->mtu = mtu;
1044         /* Burst functions can now be called again. */
1045         rte_wmb();
1046         /*
1047          * Use a safe RX burst function in case of error, otherwise select RX
1048          * burst function again.
1049          */
1050         if (!ret)
1051                 priv_select_rx_function(priv);
1052 out:
1053         priv_unlock(priv);
1054         assert(ret >= 0);
1055         return -ret;
1056 }
1057
1058 /**
1059  * DPDK callback to get flow control status.
1060  *
1061  * @param dev
1062  *   Pointer to Ethernet device structure.
1063  * @param[out] fc_conf
1064  *   Flow control output buffer.
1065  *
1066  * @return
1067  *   0 on success, negative errno value on failure.
1068  */
1069 int
1070 mlx5_dev_get_flow_ctrl(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
1071 {
1072         struct priv *priv = dev->data->dev_private;
1073         struct ifreq ifr;
1074         struct ethtool_pauseparam ethpause = {
1075                 .cmd = ETHTOOL_GPAUSEPARAM
1076         };
1077         int ret;
1078
1079         if (mlx5_is_secondary())
1080                 return -E_RTE_SECONDARY;
1081
1082         ifr.ifr_data = (void *)&ethpause;
1083         priv_lock(priv);
1084         if (priv_ifreq(priv, SIOCETHTOOL, &ifr)) {
1085                 ret = errno;
1086                 WARN("ioctl(SIOCETHTOOL, ETHTOOL_GPAUSEPARAM)"
1087                      " failed: %s",
1088                      strerror(ret));
1089                 goto out;
1090         }
1091
1092         fc_conf->autoneg = ethpause.autoneg;
1093         if (ethpause.rx_pause && ethpause.tx_pause)
1094                 fc_conf->mode = RTE_FC_FULL;
1095         else if (ethpause.rx_pause)
1096                 fc_conf->mode = RTE_FC_RX_PAUSE;
1097         else if (ethpause.tx_pause)
1098                 fc_conf->mode = RTE_FC_TX_PAUSE;
1099         else
1100                 fc_conf->mode = RTE_FC_NONE;
1101         ret = 0;
1102
1103 out:
1104         priv_unlock(priv);
1105         assert(ret >= 0);
1106         return -ret;
1107 }
1108
1109 /**
1110  * DPDK callback to modify flow control parameters.
1111  *
1112  * @param dev
1113  *   Pointer to Ethernet device structure.
1114  * @param[in] fc_conf
1115  *   Flow control parameters.
1116  *
1117  * @return
1118  *   0 on success, negative errno value on failure.
1119  */
1120 int
1121 mlx5_dev_set_flow_ctrl(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
1122 {
1123         struct priv *priv = dev->data->dev_private;
1124         struct ifreq ifr;
1125         struct ethtool_pauseparam ethpause = {
1126                 .cmd = ETHTOOL_SPAUSEPARAM
1127         };
1128         int ret;
1129
1130         if (mlx5_is_secondary())
1131                 return -E_RTE_SECONDARY;
1132
1133         ifr.ifr_data = (void *)&ethpause;
1134         ethpause.autoneg = fc_conf->autoneg;
1135         if (((fc_conf->mode & RTE_FC_FULL) == RTE_FC_FULL) ||
1136             (fc_conf->mode & RTE_FC_RX_PAUSE))
1137                 ethpause.rx_pause = 1;
1138         else
1139                 ethpause.rx_pause = 0;
1140
1141         if (((fc_conf->mode & RTE_FC_FULL) == RTE_FC_FULL) ||
1142             (fc_conf->mode & RTE_FC_TX_PAUSE))
1143                 ethpause.tx_pause = 1;
1144         else
1145                 ethpause.tx_pause = 0;
1146
1147         priv_lock(priv);
1148         if (priv_ifreq(priv, SIOCETHTOOL, &ifr)) {
1149                 ret = errno;
1150                 WARN("ioctl(SIOCETHTOOL, ETHTOOL_SPAUSEPARAM)"
1151                      " failed: %s",
1152                      strerror(ret));
1153                 goto out;
1154         }
1155         ret = 0;
1156
1157 out:
1158         priv_unlock(priv);
1159         assert(ret >= 0);
1160         return -ret;
1161 }
1162
1163 /**
1164  * Get PCI information from struct ibv_device.
1165  *
1166  * @param device
1167  *   Pointer to Ethernet device structure.
1168  * @param[out] pci_addr
1169  *   PCI bus address output buffer.
1170  *
1171  * @return
1172  *   0 on success, -1 on failure and errno is set.
1173  */
1174 int
1175 mlx5_ibv_device_to_pci_addr(const struct ibv_device *device,
1176                             struct rte_pci_addr *pci_addr)
1177 {
1178         FILE *file;
1179         char line[32];
1180         MKSTR(path, "%s/device/uevent", device->ibdev_path);
1181
1182         file = fopen(path, "rb");
1183         if (file == NULL)
1184                 return -1;
1185         while (fgets(line, sizeof(line), file) == line) {
1186                 size_t len = strlen(line);
1187                 int ret;
1188
1189                 /* Truncate long lines. */
1190                 if (len == (sizeof(line) - 1))
1191                         while (line[(len - 1)] != '\n') {
1192                                 ret = fgetc(file);
1193                                 if (ret == EOF)
1194                                         break;
1195                                 line[(len - 1)] = ret;
1196                         }
1197                 /* Extract information. */
1198                 if (sscanf(line,
1199                            "PCI_SLOT_NAME="
1200                            "%" SCNx32 ":%" SCNx8 ":%" SCNx8 ".%" SCNx8 "\n",
1201                            &pci_addr->domain,
1202                            &pci_addr->bus,
1203                            &pci_addr->devid,
1204                            &pci_addr->function) == 4) {
1205                         ret = 0;
1206                         break;
1207                 }
1208         }
1209         fclose(file);
1210         return 0;
1211 }
1212
1213 /**
1214  * Link status handler.
1215  *
1216  * @param priv
1217  *   Pointer to private structure.
1218  * @param dev
1219  *   Pointer to the rte_eth_dev structure.
1220  *
1221  * @return
1222  *   Nonzero if the callback process can be called immediately.
1223  */
1224 static int
1225 priv_dev_link_status_handler(struct priv *priv, struct rte_eth_dev *dev)
1226 {
1227         struct ibv_async_event event;
1228         struct rte_eth_link *link = &dev->data->dev_link;
1229         int ret = 0;
1230
1231         /* Read all message and acknowledge them. */
1232         for (;;) {
1233                 if (ibv_get_async_event(priv->ctx, &event))
1234                         break;
1235
1236                 if (event.event_type != IBV_EVENT_PORT_ACTIVE &&
1237                     event.event_type != IBV_EVENT_PORT_ERR)
1238                         DEBUG("event type %d on port %d not handled",
1239                               event.event_type, event.element.port_num);
1240                 ibv_ack_async_event(&event);
1241         }
1242         mlx5_link_update(dev, 0);
1243         if (((link->link_speed == 0) && link->link_status) ||
1244             ((link->link_speed != 0) && !link->link_status)) {
1245                 if (!priv->pending_alarm) {
1246                         /* Inconsistent status, check again later. */
1247                         priv->pending_alarm = 1;
1248                         rte_eal_alarm_set(MLX5_ALARM_TIMEOUT_US,
1249                                           mlx5_dev_link_status_handler,
1250                                           dev);
1251                 }
1252         } else {
1253                 ret = 1;
1254         }
1255         return ret;
1256 }
1257
1258 /**
1259  * Handle delayed link status event.
1260  *
1261  * @param arg
1262  *   Registered argument.
1263  */
1264 void
1265 mlx5_dev_link_status_handler(void *arg)
1266 {
1267         struct rte_eth_dev *dev = arg;
1268         struct priv *priv = dev->data->dev_private;
1269         int ret;
1270
1271         priv_lock(priv);
1272         assert(priv->pending_alarm == 1);
1273         priv->pending_alarm = 0;
1274         ret = priv_dev_link_status_handler(priv, dev);
1275         priv_unlock(priv);
1276         if (ret)
1277                 _rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL,
1278                                               NULL);
1279 }
1280
1281 /**
1282  * Handle interrupts from the NIC.
1283  *
1284  * @param[in] intr_handle
1285  *   Interrupt handler.
1286  * @param cb_arg
1287  *   Callback argument.
1288  */
1289 void
1290 mlx5_dev_interrupt_handler(void *cb_arg)
1291 {
1292         struct rte_eth_dev *dev = cb_arg;
1293         struct priv *priv = dev->data->dev_private;
1294         int ret;
1295
1296         priv_lock(priv);
1297         ret = priv_dev_link_status_handler(priv, dev);
1298         priv_unlock(priv);
1299         if (ret)
1300                 _rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL,
1301                                               NULL);
1302 }
1303
1304 /**
1305  * Uninstall interrupt handler.
1306  *
1307  * @param priv
1308  *   Pointer to private structure.
1309  * @param dev
1310  *   Pointer to the rte_eth_dev structure.
1311  */
1312 void
1313 priv_dev_interrupt_handler_uninstall(struct priv *priv, struct rte_eth_dev *dev)
1314 {
1315         if (!dev->data->dev_conf.intr_conf.lsc)
1316                 return;
1317         rte_intr_callback_unregister(&priv->intr_handle,
1318                                      mlx5_dev_interrupt_handler,
1319                                      dev);
1320         if (priv->pending_alarm)
1321                 rte_eal_alarm_cancel(mlx5_dev_link_status_handler, dev);
1322         priv->pending_alarm = 0;
1323         priv->intr_handle.fd = 0;
1324         priv->intr_handle.type = RTE_INTR_HANDLE_UNKNOWN;
1325 }
1326
1327 /**
1328  * Install interrupt handler.
1329  *
1330  * @param priv
1331  *   Pointer to private structure.
1332  * @param dev
1333  *   Pointer to the rte_eth_dev structure.
1334  */
1335 void
1336 priv_dev_interrupt_handler_install(struct priv *priv, struct rte_eth_dev *dev)
1337 {
1338         int rc, flags;
1339
1340         if (!dev->data->dev_conf.intr_conf.lsc)
1341                 return;
1342         assert(priv->ctx->async_fd > 0);
1343         flags = fcntl(priv->ctx->async_fd, F_GETFL);
1344         rc = fcntl(priv->ctx->async_fd, F_SETFL, flags | O_NONBLOCK);
1345         if (rc < 0) {
1346                 INFO("failed to change file descriptor async event queue");
1347                 dev->data->dev_conf.intr_conf.lsc = 0;
1348         } else {
1349                 priv->intr_handle.fd = priv->ctx->async_fd;
1350                 priv->intr_handle.type = RTE_INTR_HANDLE_EXT;
1351                 rte_intr_callback_register(&priv->intr_handle,
1352                                            mlx5_dev_interrupt_handler,
1353                                            dev);
1354         }
1355 }
1356
1357 /**
1358  * Change the link state (UP / DOWN).
1359  *
1360  * @param priv
1361  *   Pointer to Ethernet device structure.
1362  * @param up
1363  *   Nonzero for link up, otherwise link down.
1364  *
1365  * @return
1366  *   0 on success, errno value on failure.
1367  */
1368 static int
1369 priv_set_link(struct priv *priv, int up)
1370 {
1371         struct rte_eth_dev *dev = priv->dev;
1372         int err;
1373
1374         if (up) {
1375                 err = priv_set_flags(priv, ~IFF_UP, IFF_UP);
1376                 if (err)
1377                         return err;
1378                 priv_select_tx_function(priv);
1379                 priv_select_rx_function(priv);
1380         } else {
1381                 err = priv_set_flags(priv, ~IFF_UP, ~IFF_UP);
1382                 if (err)
1383                         return err;
1384                 dev->rx_pkt_burst = removed_rx_burst;
1385                 dev->tx_pkt_burst = removed_tx_burst;
1386         }
1387         return 0;
1388 }
1389
1390 /**
1391  * DPDK callback to bring the link DOWN.
1392  *
1393  * @param dev
1394  *   Pointer to Ethernet device structure.
1395  *
1396  * @return
1397  *   0 on success, errno value on failure.
1398  */
1399 int
1400 mlx5_set_link_down(struct rte_eth_dev *dev)
1401 {
1402         struct priv *priv = dev->data->dev_private;
1403         int err;
1404
1405         priv_lock(priv);
1406         err = priv_set_link(priv, 0);
1407         priv_unlock(priv);
1408         return err;
1409 }
1410
1411 /**
1412  * DPDK callback to bring the link UP.
1413  *
1414  * @param dev
1415  *   Pointer to Ethernet device structure.
1416  *
1417  * @return
1418  *   0 on success, errno value on failure.
1419  */
1420 int
1421 mlx5_set_link_up(struct rte_eth_dev *dev)
1422 {
1423         struct priv *priv = dev->data->dev_private;
1424         int err;
1425
1426         priv_lock(priv);
1427         err = priv_set_link(priv, 1);
1428         priv_unlock(priv);
1429         return err;
1430 }
1431
1432 /**
1433  * Configure secondary process queues from a private data pointer (primary
1434  * or secondary) and update burst callbacks. Can take place only once.
1435  *
1436  * All queues must have been previously created by the primary process to
1437  * avoid undefined behavior.
1438  *
1439  * @param priv
1440  *   Private data pointer from either primary or secondary process.
1441  *
1442  * @return
1443  *   Private data pointer from secondary process, NULL in case of error.
1444  */
1445 struct priv *
1446 mlx5_secondary_data_setup(struct priv *priv)
1447 {
1448         unsigned int port_id = 0;
1449         struct mlx5_secondary_data *sd;
1450         void **tx_queues;
1451         void **rx_queues;
1452         unsigned int nb_tx_queues;
1453         unsigned int nb_rx_queues;
1454         unsigned int i;
1455
1456         /* priv must be valid at this point. */
1457         assert(priv != NULL);
1458         /* priv->dev must also be valid but may point to local memory from
1459          * another process, possibly with the same address and must not
1460          * be dereferenced yet. */
1461         assert(priv->dev != NULL);
1462         /* Determine port ID by finding out where priv comes from. */
1463         while (1) {
1464                 sd = &mlx5_secondary_data[port_id];
1465                 rte_spinlock_lock(&sd->lock);
1466                 /* Primary process? */
1467                 if (sd->primary_priv == priv)
1468                         break;
1469                 /* Secondary process? */
1470                 if (sd->data.dev_private == priv)
1471                         break;
1472                 rte_spinlock_unlock(&sd->lock);
1473                 if (++port_id == RTE_DIM(mlx5_secondary_data))
1474                         port_id = 0;
1475         }
1476         /* Switch to secondary private structure. If private data has already
1477          * been updated by another thread, there is nothing else to do. */
1478         priv = sd->data.dev_private;
1479         if (priv->dev->data == &sd->data)
1480                 goto end;
1481         /* Sanity checks. Secondary private structure is supposed to point
1482          * to local eth_dev, itself still pointing to the shared device data
1483          * structure allocated by the primary process. */
1484         assert(sd->shared_dev_data != &sd->data);
1485         assert(sd->data.nb_tx_queues == 0);
1486         assert(sd->data.tx_queues == NULL);
1487         assert(sd->data.nb_rx_queues == 0);
1488         assert(sd->data.rx_queues == NULL);
1489         assert(priv != sd->primary_priv);
1490         assert(priv->dev->data == sd->shared_dev_data);
1491         assert(priv->txqs_n == 0);
1492         assert(priv->txqs == NULL);
1493         assert(priv->rxqs_n == 0);
1494         assert(priv->rxqs == NULL);
1495         nb_tx_queues = sd->shared_dev_data->nb_tx_queues;
1496         nb_rx_queues = sd->shared_dev_data->nb_rx_queues;
1497         /* Allocate local storage for queues. */
1498         tx_queues = rte_zmalloc("secondary ethdev->tx_queues",
1499                                 sizeof(sd->data.tx_queues[0]) * nb_tx_queues,
1500                                 RTE_CACHE_LINE_SIZE);
1501         rx_queues = rte_zmalloc("secondary ethdev->rx_queues",
1502                                 sizeof(sd->data.rx_queues[0]) * nb_rx_queues,
1503                                 RTE_CACHE_LINE_SIZE);
1504         if (tx_queues == NULL || rx_queues == NULL)
1505                 goto error;
1506         /* Lock to prevent control operations during setup. */
1507         priv_lock(priv);
1508         /* TX queues. */
1509         for (i = 0; i != nb_tx_queues; ++i) {
1510                 struct txq *primary_txq = (*sd->primary_priv->txqs)[i];
1511                 struct txq_ctrl *primary_txq_ctrl;
1512                 struct txq_ctrl *txq_ctrl;
1513
1514                 if (primary_txq == NULL)
1515                         continue;
1516                 primary_txq_ctrl = container_of(primary_txq,
1517                                                 struct txq_ctrl, txq);
1518                 txq_ctrl = rte_calloc_socket("TXQ", 1, sizeof(*txq_ctrl) +
1519                                              (1 << primary_txq->elts_n) *
1520                                              sizeof(struct rte_mbuf *), 0,
1521                                              primary_txq_ctrl->socket);
1522                 if (txq_ctrl != NULL) {
1523                         if (txq_ctrl_setup(priv->dev,
1524                                            txq_ctrl,
1525                                            1 << primary_txq->elts_n,
1526                                            primary_txq_ctrl->socket,
1527                                            NULL) == 0) {
1528                                 txq_ctrl->txq.stats.idx =
1529                                         primary_txq->stats.idx;
1530                                 tx_queues[i] = &txq_ctrl->txq;
1531                                 continue;
1532                         }
1533                         rte_free(txq_ctrl);
1534                 }
1535                 while (i) {
1536                         txq_ctrl = tx_queues[--i];
1537                         txq_cleanup(txq_ctrl);
1538                         rte_free(txq_ctrl);
1539                 }
1540                 goto error;
1541         }
1542         /* RX queues. */
1543         for (i = 0; i != nb_rx_queues; ++i) {
1544                 struct rxq_ctrl *primary_rxq =
1545                         container_of((*sd->primary_priv->rxqs)[i],
1546                                      struct rxq_ctrl, rxq);
1547
1548                 if (primary_rxq == NULL)
1549                         continue;
1550                 /* Not supported yet. */
1551                 rx_queues[i] = NULL;
1552         }
1553         /* Update everything. */
1554         priv->txqs = (void *)tx_queues;
1555         priv->txqs_n = nb_tx_queues;
1556         priv->rxqs = (void *)rx_queues;
1557         priv->rxqs_n = nb_rx_queues;
1558         sd->data.rx_queues = rx_queues;
1559         sd->data.tx_queues = tx_queues;
1560         sd->data.nb_rx_queues = nb_rx_queues;
1561         sd->data.nb_tx_queues = nb_tx_queues;
1562         sd->data.dev_link = sd->shared_dev_data->dev_link;
1563         sd->data.mtu = sd->shared_dev_data->mtu;
1564         memcpy(sd->data.rx_queue_state, sd->shared_dev_data->rx_queue_state,
1565                sizeof(sd->data.rx_queue_state));
1566         memcpy(sd->data.tx_queue_state, sd->shared_dev_data->tx_queue_state,
1567                sizeof(sd->data.tx_queue_state));
1568         sd->data.dev_flags = sd->shared_dev_data->dev_flags;
1569         /* Use local data from now on. */
1570         rte_mb();
1571         priv->dev->data = &sd->data;
1572         rte_mb();
1573         priv_select_tx_function(priv);
1574         priv_select_rx_function(priv);
1575         priv_unlock(priv);
1576 end:
1577         /* More sanity checks. */
1578         assert(priv->dev->data == &sd->data);
1579         rte_spinlock_unlock(&sd->lock);
1580         return priv;
1581 error:
1582         priv_unlock(priv);
1583         rte_free(tx_queues);
1584         rte_free(rx_queues);
1585         rte_spinlock_unlock(&sd->lock);
1586         return NULL;
1587 }
1588
1589 /**
1590  * Configure the TX function to use.
1591  *
1592  * @param priv
1593  *   Pointer to private structure.
1594  */
1595 void
1596 priv_select_tx_function(struct priv *priv)
1597 {
1598         priv->dev->tx_pkt_burst = mlx5_tx_burst;
1599         /* Select appropriate TX function. */
1600         if (priv->mps == MLX5_MPW_ENHANCED) {
1601                 if (priv_check_vec_tx_support(priv) > 0) {
1602                         if (priv_check_raw_vec_tx_support(priv) > 0)
1603                                 priv->dev->tx_pkt_burst = mlx5_tx_burst_raw_vec;
1604                         else
1605                                 priv->dev->tx_pkt_burst = mlx5_tx_burst_vec;
1606                         DEBUG("selected Enhanced MPW TX vectorized function");
1607                 } else {
1608                         priv->dev->tx_pkt_burst = mlx5_tx_burst_empw;
1609                         DEBUG("selected Enhanced MPW TX function");
1610                 }
1611         } else if (priv->mps && priv->txq_inline) {
1612                 priv->dev->tx_pkt_burst = mlx5_tx_burst_mpw_inline;
1613                 DEBUG("selected MPW inline TX function");
1614         } else if (priv->mps) {
1615                 priv->dev->tx_pkt_burst = mlx5_tx_burst_mpw;
1616                 DEBUG("selected MPW TX function");
1617         }
1618 }
1619
1620 /**
1621  * Configure the RX function to use.
1622  *
1623  * @param priv
1624  *   Pointer to private structure.
1625  */
1626 void
1627 priv_select_rx_function(struct priv *priv)
1628 {
1629         if (priv_check_vec_rx_support(priv) > 0) {
1630                 priv_prep_vec_rx_function(priv);
1631                 priv->dev->rx_pkt_burst = mlx5_rx_burst_vec;
1632                 DEBUG("selected RX vectorized function");
1633         } else {
1634                 priv->dev->rx_pkt_burst = mlx5_rx_burst;
1635         }
1636 }