drivers/net/failsafe/failsafe_ether.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright 2017 6WIND S.A.
   3  * Copyright 2017 Mellanox Technologies, Ltd
   4  */
   5
   6 #include <unistd.h>
   7
   8 #include <rte_flow.h>
   9 #include <rte_flow_driver.h>
  10 #include <rte_cycles.h>
  11
  12 #include "failsafe_private.h"
  13
  14 /** Print a message out of a flow error. */
  15 static int
  16 fs_flow_complain(struct rte_flow_error *error)
  17 {
  18         static const char *const errstrlist[] = {
  19                 [RTE_FLOW_ERROR_TYPE_NONE] = "no error",
  20                 [RTE_FLOW_ERROR_TYPE_UNSPECIFIED] = "cause unspecified",
  21                 [RTE_FLOW_ERROR_TYPE_HANDLE] = "flow rule (handle)",
  22                 [RTE_FLOW_ERROR_TYPE_ATTR_GROUP] = "group field",
  23                 [RTE_FLOW_ERROR_TYPE_ATTR_PRIORITY] = "priority field",
  24                 [RTE_FLOW_ERROR_TYPE_ATTR_INGRESS] = "ingress field",
  25                 [RTE_FLOW_ERROR_TYPE_ATTR_EGRESS] = "egress field",
  26                 [RTE_FLOW_ERROR_TYPE_ATTR] = "attributes structure",
  27                 [RTE_FLOW_ERROR_TYPE_ITEM_NUM] = "pattern length",
  28                 [RTE_FLOW_ERROR_TYPE_ITEM] = "specific pattern item",
  29                 [RTE_FLOW_ERROR_TYPE_ACTION_NUM] = "number of actions",
  30                 [RTE_FLOW_ERROR_TYPE_ACTION] = "specific action",
  31         };
  32         const char *errstr;
  33         char buf[32];
  34         int err = rte_errno;
  35
  36         if ((unsigned int)error->type >= RTE_DIM(errstrlist) ||
  37                         !errstrlist[error->type])
  38                 errstr = "unknown type";
  39         else
  40                 errstr = errstrlist[error->type];
  41         ERROR("Caught error type %d (%s): %s%s\n",
  42                 error->type, errstr,
  43                 error->cause ? (snprintf(buf, sizeof(buf), "cause: %p, ",
  44                                 error->cause), buf) : "",
  45                 error->message ? error->message : "(no stated reason)");
  46         return -err;
  47 }
  48
  49 static int
  50 eth_dev_flow_isolate_set(struct rte_eth_dev *dev,
  51                          struct sub_device *sdev)
  52 {
  53         struct rte_flow_error ferror;
  54         int ret;
  55
  56         if (!PRIV(dev)->flow_isolated) {
  57                 DEBUG("Flow isolation already disabled");
  58         } else {
  59                 DEBUG("Enabling flow isolation");
  60                 ret = rte_flow_isolate(PORT_ID(sdev),
  61                                        PRIV(dev)->flow_isolated,
  62                                        &ferror);
  63                 if (ret) {
  64                         fs_flow_complain(&ferror);
  65                         return ret;
  66                 }
  67         }
  68         return 0;
  69 }
  70
  71 static int
  72 fs_eth_dev_conf_apply(struct rte_eth_dev *dev,
  73                 struct sub_device *sdev)
  74 {
  75         struct rte_eth_dev *edev;
  76         struct rte_vlan_filter_conf *vfc1;
  77         struct rte_vlan_filter_conf *vfc2;
  78         struct rte_flow *flow;
  79         struct rte_flow_error ferror;
  80         uint32_t i;
  81         int ret;
  82
  83         edev = ETH(sdev);
  84         /* RX queue setup */
  85         for (i = 0; i < dev->data->nb_rx_queues; i++) {
  86                 struct rxq *rxq;
  87
  88                 rxq = dev->data->rx_queues[i];
  89                 ret = rte_eth_rx_queue_setup(PORT_ID(sdev), i,
  90                                 rxq->info.nb_desc, rxq->socket_id,
  91                                 &rxq->info.conf, rxq->info.mp);
  92                 if (ret) {
  93                         ERROR("rx_queue_setup failed");
  94                         return ret;
  95                 }
  96         }
  97         /* TX queue setup */
  98         for (i = 0; i < dev->data->nb_tx_queues; i++) {
  99                 struct txq *txq;
 100
 101                 txq = dev->data->tx_queues[i];
 102                 ret = rte_eth_tx_queue_setup(PORT_ID(sdev), i,
 103                                 txq->info.nb_desc, txq->socket_id,
 104                                 &txq->info.conf);
 105                 if (ret) {
 106                         ERROR("tx_queue_setup failed");
 107                         return ret;
 108                 }
 109         }
 110         /* dev_link.link_status */
 111         if (dev->data->dev_link.link_status !=
 112             edev->data->dev_link.link_status) {
 113                 DEBUG("Configuring link_status");
 114                 if (dev->data->dev_link.link_status)
 115                         ret = rte_eth_dev_set_link_up(PORT_ID(sdev));
 116                 else
 117                         ret = rte_eth_dev_set_link_down(PORT_ID(sdev));
 118                 if (ret) {
 119                         ERROR("Failed to apply link_status");
 120                         return ret;
 121                 }
 122         } else {
 123                 DEBUG("link_status already set");
 124         }
 125         /* promiscuous */
 126         if (dev->data->promiscuous != edev->data->promiscuous) {
 127                 DEBUG("Configuring promiscuous");
 128                 if (dev->data->promiscuous)
 129                         ret = rte_eth_promiscuous_enable(PORT_ID(sdev));
 130                 else
 131                         ret = rte_eth_promiscuous_disable(PORT_ID(sdev));
 132                 if (ret != 0) {
 133                         ERROR("Failed to apply promiscuous mode");
 134                         return ret;
 135                 }
 136         } else {
 137                 DEBUG("promiscuous already set");
 138         }
 139         /* all_multicast */
 140         if (dev->data->all_multicast != edev->data->all_multicast) {
 141                 DEBUG("Configuring all_multicast");
 142                 if (dev->data->all_multicast)
 143                         ret = rte_eth_allmulticast_enable(PORT_ID(sdev));
 144                 else
 145                         ret = rte_eth_allmulticast_disable(PORT_ID(sdev));
 146                 if (ret != 0) {
 147                         ERROR("Failed to apply allmulticast mode");
 148                         return ret;
 149                 }
 150         } else {
 151                 DEBUG("all_multicast already set");
 152         }
 153         /* MTU */
 154         if (dev->data->mtu != edev->data->mtu) {
 155                 DEBUG("Configuring MTU");
 156                 ret = rte_eth_dev_set_mtu(PORT_ID(sdev), dev->data->mtu);
 157                 if (ret) {
 158                         ERROR("Failed to apply MTU");
 159                         return ret;
 160                 }
 161         } else {
 162                 DEBUG("MTU already set");
 163         }
 164         /* default MAC */
 165         DEBUG("Configuring default MAC address");
 166         ret = rte_eth_dev_default_mac_addr_set(PORT_ID(sdev),
 167                         &dev->data->mac_addrs[0]);
 168         if (ret) {
 169                 ERROR("Setting default MAC address failed");
 170                 return ret;
 171         }
 172         /* additional MAC */
 173         if (PRIV(dev)->nb_mac_addr > 1)
 174                 DEBUG("Configure additional MAC address%s",
 175                         (PRIV(dev)->nb_mac_addr > 2 ? "es" : ""));
 176         for (i = 1; i < PRIV(dev)->nb_mac_addr; i++) {
 177                 struct rte_ether_addr *ea;
 178
 179                 ea = &dev->data->mac_addrs[i];
 180                 ret = rte_eth_dev_mac_addr_add(PORT_ID(sdev), ea,
 181                                 PRIV(dev)->mac_addr_pool[i]);
 182                 if (ret) {
 183                         char ea_fmt[RTE_ETHER_ADDR_FMT_SIZE];
 184
 185                         rte_ether_format_addr(ea_fmt,
 186                                         RTE_ETHER_ADDR_FMT_SIZE, ea);
 187                         ERROR("Adding MAC address %s failed", ea_fmt);
 188                         return ret;
 189                 }
 190         }
 191         /*
 192          * Propagate multicast MAC addresses to sub-devices,
 193          * if non zero number of addresses is set.
 194          * The condition is required to avoid breakage of failsafe
 195          * for sub-devices which do not support the operation
 196          * if the feature is really not used.
 197          */
 198         if (PRIV(dev)->nb_mcast_addr > 0) {
 199                 DEBUG("Configuring multicast MAC addresses");
 200                 ret = rte_eth_dev_set_mc_addr_list(PORT_ID(sdev),
 201                                                    PRIV(dev)->mcast_addrs,
 202                                                    PRIV(dev)->nb_mcast_addr);
 203                 if (ret) {
 204                         ERROR("Failed to apply multicast MAC addresses");
 205                         return ret;
 206                 }
 207         }
 208         /* VLAN filter */
 209         vfc1 = &dev->data->vlan_filter_conf;
 210         vfc2 = &edev->data->vlan_filter_conf;
 211         if (memcmp(vfc1, vfc2, sizeof(struct rte_vlan_filter_conf))) {
 212                 uint64_t vbit;
 213                 uint64_t ids;
 214                 size_t i;
 215                 uint16_t vlan_id;
 216
 217                 DEBUG("Configuring VLAN filter");
 218                 for (i = 0; i < RTE_DIM(vfc1->ids); i++) {
 219                         if (vfc1->ids[i] == 0)
 220                                 continue;
 221                         ids = vfc1->ids[i];
 222                         while (ids) {
 223                                 vlan_id = 64 * i;
 224                                 /* count trailing zeroes */
 225                                 vbit = ~ids & (ids - 1);
 226                                 /* clear least significant bit set */
 227                                 ids ^= (ids ^ (ids - 1)) ^ vbit;
 228                                 for (; vbit; vlan_id++)
 229                                         vbit >>= 1;
 230                                 ret = rte_eth_dev_vlan_filter(
 231                                         PORT_ID(sdev), vlan_id, 1);
 232                                 if (ret) {
 233                                         ERROR("Failed to apply VLAN filter %hu",
 234                                                 vlan_id);
 235                                         return ret;
 236                                 }
 237                         }
 238                 }
 239         } else {
 240                 DEBUG("VLAN filter already set");
 241         }
 242         /* rte_flow */
 243         if (TAILQ_EMPTY(&PRIV(dev)->flow_list)) {
 244                 DEBUG("rte_flow already set");
 245         } else {
 246                 DEBUG("Resetting rte_flow configuration");
 247                 ret = rte_flow_flush(PORT_ID(sdev), &ferror);
 248                 if (ret) {
 249                         fs_flow_complain(&ferror);
 250                         return ret;
 251                 }
 252                 i = 0;
 253                 rte_errno = 0;
 254                 DEBUG("Configuring rte_flow");
 255                 TAILQ_FOREACH(flow, &PRIV(dev)->flow_list, next) {
 256                         DEBUG("Creating flow #%" PRIu32, i++);
 257                         flow->flows[SUB_ID(sdev)] =
 258                                 rte_flow_create(PORT_ID(sdev),
 259                                                 flow->rule.attr,
 260                                                 flow->rule.pattern,
 261                                                 flow->rule.actions,
 262                                                 &ferror);
 263                         ret = rte_errno;
 264                         if (ret)
 265                                 break;
 266                 }
 267                 if (ret) {
 268                         fs_flow_complain(&ferror);
 269                         return ret;
 270                 }
 271         }
 272         return 0;
 273 }
 274
 275 static void
 276 fs_dev_remove(struct sub_device *sdev)
 277 {
 278         int ret;
 279
 280         if (sdev == NULL)
 281                 return;
 282         switch (sdev->state) {
 283         case DEV_STARTED:
 284                 failsafe_rx_intr_uninstall_subdevice(sdev);
 285                 rte_eth_dev_stop(PORT_ID(sdev));
 286                 sdev->state = DEV_ACTIVE;
 287                 /* fallthrough */
 288         case DEV_ACTIVE:
 289                 failsafe_eth_dev_unregister_callbacks(sdev);
 290                 rte_eth_dev_close(PORT_ID(sdev));
 291                 sdev->state = DEV_PROBED;
 292                 /* fallthrough */
 293         case DEV_PROBED:
 294                 ret = rte_dev_remove(sdev->dev);
 295                 if (ret < 0) {
 296                         ERROR("Bus detach failed for sub_device %u",
 297                               SUB_ID(sdev));
 298                 } else {
 299                         rte_eth_dev_release_port(ETH(sdev));
 300                 }
 301                 sdev->state = DEV_PARSED;
 302                 /* fallthrough */
 303         case DEV_PARSED:
 304         case DEV_UNDEFINED:
 305                 sdev->state = DEV_UNDEFINED;
 306                 sdev->sdev_port_id = RTE_MAX_ETHPORTS;
 307                 /* the end */
 308                 break;
 309         }
 310         sdev->remove = 0;
 311         failsafe_hotplug_alarm_install(fs_dev(sdev));
 312 }
 313
 314 static void
 315 fs_dev_stats_save(struct sub_device *sdev)
 316 {
 317         struct rte_eth_stats stats;
 318         int err;
 319
 320         /* Attempt to read current stats. */
 321         err = rte_eth_stats_get(PORT_ID(sdev), &stats);
 322         if (err) {
 323                 uint64_t timestamp = sdev->stats_snapshot.timestamp;
 324
 325                 WARN("Could not access latest statistics from sub-device %d.\n",
 326                          SUB_ID(sdev));
 327                 if (timestamp != 0)
 328                         WARN("Using latest snapshot taken before %"PRIu64" seconds.\n",
 329                                  (rte_rdtsc() - timestamp) / rte_get_tsc_hz());
 330         }
 331         failsafe_stats_increment
 332                 (&PRIV(fs_dev(sdev))->stats_accumulator,
 333                 err ? &sdev->stats_snapshot.stats : &stats);
 334         memset(&sdev->stats_snapshot, 0, sizeof(sdev->stats_snapshot));
 335 }
 336
 337 static inline int
 338 fs_rxtx_clean(struct sub_device *sdev)
 339 {
 340         uint16_t i;
 341
 342         for (i = 0; i < ETH(sdev)->data->nb_rx_queues; i++)
 343                 if (FS_ATOMIC_RX(sdev, i))
 344                         return 0;
 345         for (i = 0; i < ETH(sdev)->data->nb_tx_queues; i++)
 346                 if (FS_ATOMIC_TX(sdev, i))
 347                         return 0;
 348         return 1;
 349 }
 350
 351 void
 352 failsafe_eth_dev_unregister_callbacks(struct sub_device *sdev)
 353 {
 354         int ret;
 355
 356         if (sdev == NULL)
 357                 return;
 358         if (sdev->rmv_callback) {
 359                 ret = rte_eth_dev_callback_unregister(PORT_ID(sdev),
 360                                                 RTE_ETH_EVENT_INTR_RMV,
 361                                                 failsafe_eth_rmv_event_callback,
 362                                                 sdev);
 363                 if (ret)
 364                         WARN("Failed to unregister RMV callback for sub_device"
 365                              " %d", SUB_ID(sdev));
 366                 sdev->rmv_callback = 0;
 367         }
 368         if (sdev->lsc_callback) {
 369                 ret = rte_eth_dev_callback_unregister(PORT_ID(sdev),
 370                                                 RTE_ETH_EVENT_INTR_LSC,
 371                                                 failsafe_eth_lsc_event_callback,
 372                                                 sdev);
 373                 if (ret)
 374                         WARN("Failed to unregister LSC callback for sub_device"
 375                              " %d", SUB_ID(sdev));
 376                 sdev->lsc_callback = 0;
 377         }
 378 }
 379
 380 void
 381 failsafe_dev_remove(struct rte_eth_dev *dev)
 382 {
 383         struct sub_device *sdev;
 384         uint8_t i;
 385
 386         FOREACH_SUBDEV_STATE(sdev, i, dev, DEV_ACTIVE)
 387                 if (sdev->remove && fs_rxtx_clean(sdev)) {
 388                         if (fs_lock(dev, 1) != 0)
 389                                 return;
 390                         fs_dev_stats_save(sdev);
 391                         fs_dev_remove(sdev);
 392                         fs_unlock(dev, 1);
 393                 }
 394 }
 395
 396 static int
 397 failsafe_eth_dev_rx_queues_sync(struct rte_eth_dev *dev)
 398 {
 399         struct rxq *rxq;
 400         int ret;
 401         uint16_t i;
 402
 403         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 404                 rxq = dev->data->rx_queues[i];
 405
 406                 if (rxq->info.conf.rx_deferred_start &&
 407                     dev->data->rx_queue_state[i] ==
 408                                                 RTE_ETH_QUEUE_STATE_STARTED) {
 409                         /*
 410                          * The subdevice Rx queue does not launch on device
 411                          * start if deferred start flag is set. It needs to be
 412                          * started manually in case an appropriate failsafe Rx
 413                          * queue has been started earlier.
 414                          */
 415                         ret = dev->dev_ops->rx_queue_start(dev, i);
 416                         if (ret) {
 417                                 ERROR("Could not synchronize Rx queue %d", i);
 418                                 return ret;
 419                         }
 420                 } else if (dev->data->rx_queue_state[i] ==
 421                                                 RTE_ETH_QUEUE_STATE_STOPPED) {
 422                         /*
 423                          * The subdevice Rx queue needs to be stopped manually
 424                          * in case an appropriate failsafe Rx queue has been
 425                          * stopped earlier.
 426                          */
 427                         ret = dev->dev_ops->rx_queue_stop(dev, i);
 428                         if (ret) {
 429                                 ERROR("Could not synchronize Rx queue %d", i);
 430                                 return ret;
 431                         }
 432                 }
 433         }
 434         return 0;
 435 }
 436
 437 static int
 438 failsafe_eth_dev_tx_queues_sync(struct rte_eth_dev *dev)
 439 {
 440         struct txq *txq;
 441         int ret;
 442         uint16_t i;
 443
 444         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 445                 txq = dev->data->tx_queues[i];
 446
 447                 if (txq->info.conf.tx_deferred_start &&
 448                     dev->data->tx_queue_state[i] ==
 449                                                 RTE_ETH_QUEUE_STATE_STARTED) {
 450                         /*
 451                          * The subdevice Tx queue does not launch on device
 452                          * start if deferred start flag is set. It needs to be
 453                          * started manually in case an appropriate failsafe Tx
 454                          * queue has been started earlier.
 455                          */
 456                         ret = dev->dev_ops->tx_queue_start(dev, i);
 457                         if (ret) {
 458                                 ERROR("Could not synchronize Tx queue %d", i);
 459                                 return ret;
 460                         }
 461                 } else if (dev->data->tx_queue_state[i] ==
 462                                                 RTE_ETH_QUEUE_STATE_STOPPED) {
 463                         /*
 464                          * The subdevice Tx queue needs to be stopped manually
 465                          * in case an appropriate failsafe Tx queue has been
 466                          * stopped earlier.
 467                          */
 468                         ret = dev->dev_ops->tx_queue_stop(dev, i);
 469                         if (ret) {
 470                                 ERROR("Could not synchronize Tx queue %d", i);
 471                                 return ret;
 472                         }
 473                 }
 474         }
 475         return 0;
 476 }
 477
 478 int
 479 failsafe_eth_dev_state_sync(struct rte_eth_dev *dev)
 480 {
 481         struct sub_device *sdev;
 482         uint32_t inactive;
 483         int ret;
 484         uint8_t i;
 485
 486         if (PRIV(dev)->state < DEV_PARSED)
 487                 return 0;
 488
 489         ret = failsafe_args_parse_subs(dev);
 490         if (ret)
 491                 goto err_remove;
 492
 493         if (PRIV(dev)->state < DEV_PROBED)
 494                 return 0;
 495         ret = failsafe_eal_init(dev);
 496         if (ret)
 497                 goto err_remove;
 498         if (PRIV(dev)->state < DEV_ACTIVE)
 499                 return 0;
 500         inactive = 0;
 501         FOREACH_SUBDEV(sdev, i, dev) {
 502                 if (sdev->state == DEV_PROBED) {
 503                         inactive |= UINT32_C(1) << i;
 504                         ret = eth_dev_flow_isolate_set(dev, sdev);
 505                         if (ret) {
 506                                 ERROR("Could not apply configuration to sub_device %d",
 507                                       i);
 508                                 goto err_remove;
 509                         }
 510                 }
 511         }
 512         ret = dev->dev_ops->dev_configure(dev);
 513         if (ret)
 514                 goto err_remove;
 515         FOREACH_SUBDEV(sdev, i, dev) {
 516                 if (inactive & (UINT32_C(1) << i)) {
 517                         ret = fs_eth_dev_conf_apply(dev, sdev);
 518                         if (ret) {
 519                                 ERROR("Could not apply configuration to sub_device %d",
 520                                       i);
 521                                 goto err_remove;
 522                         }
 523                 }
 524         }
 525         /*
 526          * If new devices have been configured, check if
 527          * the link state has changed.
 528          */
 529         if (inactive)
 530                 dev->dev_ops->link_update(dev, 1);
 531         if (PRIV(dev)->state < DEV_STARTED)
 532                 return 0;
 533         ret = dev->dev_ops->dev_start(dev);
 534         if (ret)
 535                 goto err_remove;
 536         ret = failsafe_eth_dev_rx_queues_sync(dev);
 537         if (ret)
 538                 goto err_remove;
 539         ret = failsafe_eth_dev_tx_queues_sync(dev);
 540         if (ret)
 541                 goto err_remove;
 542         return 0;
 543 err_remove:
 544         FOREACH_SUBDEV(sdev, i, dev)
 545                 if (sdev->state != PRIV(dev)->state)
 546                         sdev->remove = 1;
 547         return ret;
 548 }
 549
 550 void
 551 failsafe_stats_increment(struct rte_eth_stats *to, struct rte_eth_stats *from)
 552 {
 553         uint32_t i;
 554
 555         RTE_ASSERT(to != NULL && from != NULL);
 556         to->ipackets += from->ipackets;
 557         to->opackets += from->opackets;
 558         to->ibytes += from->ibytes;
 559         to->obytes += from->obytes;
 560         to->imissed += from->imissed;
 561         to->ierrors += from->ierrors;
 562         to->oerrors += from->oerrors;
 563         to->rx_nombuf += from->rx_nombuf;
 564         for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS; i++) {
 565                 to->q_ipackets[i] += from->q_ipackets[i];
 566                 to->q_opackets[i] += from->q_opackets[i];
 567                 to->q_ibytes[i] += from->q_ibytes[i];
 568                 to->q_obytes[i] += from->q_obytes[i];
 569                 to->q_errors[i] += from->q_errors[i];
 570         }
 571 }
 572
 573 int
 574 failsafe_eth_rmv_event_callback(uint16_t port_id __rte_unused,
 575                                 enum rte_eth_event_type event __rte_unused,
 576                                 void *cb_arg, void *out __rte_unused)
 577 {
 578         struct sub_device *sdev = cb_arg;
 579
 580         fs_lock(fs_dev(sdev), 0);
 581         /* Switch as soon as possible tx_dev. */
 582         fs_switch_dev(fs_dev(sdev), sdev);
 583         /* Use safe bursts in any case. */
 584         failsafe_set_burst_fn(fs_dev(sdev), 1);
 585         /*
 586          * Async removal, the sub-PMD will try to unregister
 587          * the callback at the source of the current thread context.
 588          */
 589         sdev->remove = 1;
 590         fs_unlock(fs_dev(sdev), 0);
 591         return 0;
 592 }
 593
 594 int
 595 failsafe_eth_lsc_event_callback(uint16_t port_id __rte_unused,
 596                                 enum rte_eth_event_type event __rte_unused,
 597                                 void *cb_arg, void *out __rte_unused)
 598 {
 599         struct rte_eth_dev *dev = cb_arg;
 600         int ret;
 601
 602         ret = dev->dev_ops->link_update(dev, 0);
 603         /* We must pass on the LSC event */
 604         if (ret)
 605                 return _rte_eth_dev_callback_process(dev,
 606                                                      RTE_ETH_EVENT_INTR_LSC,
 607                                                      NULL);
 608         else
 609                 return 0;
 610 }
 611
 612 /* Take sub-device ownership before it becomes exposed to the application. */
 613 int
 614 failsafe_eth_new_event_callback(uint16_t port_id,
 615                                 enum rte_eth_event_type event __rte_unused,
 616                                 void *cb_arg, void *out __rte_unused)
 617 {
 618         struct rte_eth_dev *fs_dev = cb_arg;
 619         struct sub_device *sdev;
 620         struct rte_eth_dev *dev = &rte_eth_devices[port_id];
 621         uint8_t i;
 622
 623         FOREACH_SUBDEV_STATE(sdev, i, fs_dev, DEV_PARSED) {
 624                 if (sdev->state >= DEV_PROBED)
 625                         continue;
 626                 if (dev->device == NULL) {
 627                         WARN("Trying to probe malformed device %s.\n",
 628                              sdev->devargs.name);
 629                         continue;
 630                 }
 631                 if (strcmp(sdev->devargs.name, dev->device->name) != 0)
 632                         continue;
 633                 rte_eth_dev_owner_set(port_id, &PRIV(fs_dev)->my_owner);
 634                 /* The actual owner will be checked after the port probing. */
 635                 break;
 636         }
 637         return 0;
 638 }