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 rte_eth_promiscuous_enable(PORT_ID(sdev)); 130 else 131 rte_eth_promiscuous_disable(PORT_ID(sdev)); 132 } else { 133 DEBUG("promiscuous already set"); 134 } 135 /* all_multicast */ 136 if (dev->data->all_multicast != edev->data->all_multicast) { 137 DEBUG("Configuring all_multicast"); 138 if (dev->data->all_multicast) 139 rte_eth_allmulticast_enable(PORT_ID(sdev)); 140 else 141 rte_eth_allmulticast_disable(PORT_ID(sdev)); 142 } else { 143 DEBUG("all_multicast already set"); 144 } 145 /* MTU */ 146 if (dev->data->mtu != edev->data->mtu) { 147 DEBUG("Configuring MTU"); 148 ret = rte_eth_dev_set_mtu(PORT_ID(sdev), dev->data->mtu); 149 if (ret) { 150 ERROR("Failed to apply MTU"); 151 return ret; 152 } 153 } else { 154 DEBUG("MTU already set"); 155 } 156 /* default MAC */ 157 DEBUG("Configuring default MAC address"); 158 ret = rte_eth_dev_default_mac_addr_set(PORT_ID(sdev), 159 &dev->data->mac_addrs[0]); 160 if (ret) { 161 ERROR("Setting default MAC address failed"); 162 return ret; 163 } 164 /* additional MAC */ 165 if (PRIV(dev)->nb_mac_addr > 1) 166 DEBUG("Configure additional MAC address%s", 167 (PRIV(dev)->nb_mac_addr > 2 ? "es" : "")); 168 for (i = 1; i < PRIV(dev)->nb_mac_addr; i++) { 169 struct ether_addr *ea; 170 171 ea = &dev->data->mac_addrs[i]; 172 ret = rte_eth_dev_mac_addr_add(PORT_ID(sdev), ea, 173 PRIV(dev)->mac_addr_pool[i]); 174 if (ret) { 175 char ea_fmt[ETHER_ADDR_FMT_SIZE]; 176 177 ether_format_addr(ea_fmt, ETHER_ADDR_FMT_SIZE, ea); 178 ERROR("Adding MAC address %s failed", ea_fmt); 179 return ret; 180 } 181 } 182 /* 183 * Propagate multicast MAC addresses to sub-devices, 184 * if non zero number of addresses is set. 185 * The condition is required to avoid breakage of failsafe 186 * for sub-devices which do not support the operation 187 * if the feature is really not used. 188 */ 189 if (PRIV(dev)->nb_mcast_addr > 0) { 190 DEBUG("Configuring multicast MAC addresses"); 191 ret = rte_eth_dev_set_mc_addr_list(PORT_ID(sdev), 192 PRIV(dev)->mcast_addrs, 193 PRIV(dev)->nb_mcast_addr); 194 if (ret) { 195 ERROR("Failed to apply multicast MAC addresses"); 196 return ret; 197 } 198 } 199 /* VLAN filter */ 200 vfc1 = &dev->data->vlan_filter_conf; 201 vfc2 = &edev->data->vlan_filter_conf; 202 if (memcmp(vfc1, vfc2, sizeof(struct rte_vlan_filter_conf))) { 203 uint64_t vbit; 204 uint64_t ids; 205 size_t i; 206 uint16_t vlan_id; 207 208 DEBUG("Configuring VLAN filter"); 209 for (i = 0; i < RTE_DIM(vfc1->ids); i++) { 210 if (vfc1->ids[i] == 0) 211 continue; 212 ids = vfc1->ids[i]; 213 while (ids) { 214 vlan_id = 64 * i; 215 /* count trailing zeroes */ 216 vbit = ~ids & (ids - 1); 217 /* clear least significant bit set */ 218 ids ^= (ids ^ (ids - 1)) ^ vbit; 219 for (; vbit; vlan_id++) 220 vbit >>= 1; 221 ret = rte_eth_dev_vlan_filter( 222 PORT_ID(sdev), vlan_id, 1); 223 if (ret) { 224 ERROR("Failed to apply VLAN filter %hu", 225 vlan_id); 226 return ret; 227 } 228 } 229 } 230 } else { 231 DEBUG("VLAN filter already set"); 232 } 233 /* rte_flow */ 234 if (TAILQ_EMPTY(&PRIV(dev)->flow_list)) { 235 DEBUG("rte_flow already set"); 236 } else { 237 DEBUG("Resetting rte_flow configuration"); 238 ret = rte_flow_flush(PORT_ID(sdev), &ferror); 239 if (ret) { 240 fs_flow_complain(&ferror); 241 return ret; 242 } 243 i = 0; 244 rte_errno = 0; 245 DEBUG("Configuring rte_flow"); 246 TAILQ_FOREACH(flow, &PRIV(dev)->flow_list, next) { 247 DEBUG("Creating flow #%" PRIu32, i++); 248 flow->flows[SUB_ID(sdev)] = 249 rte_flow_create(PORT_ID(sdev), 250 flow->rule.attr, 251 flow->rule.pattern, 252 flow->rule.actions, 253 &ferror); 254 ret = rte_errno; 255 if (ret) 256 break; 257 } 258 if (ret) { 259 fs_flow_complain(&ferror); 260 return ret; 261 } 262 } 263 return 0; 264 } 265 266 static void 267 fs_dev_remove(struct sub_device *sdev) 268 { 269 int ret; 270 271 if (sdev == NULL) 272 return; 273 switch (sdev->state) { 274 case DEV_STARTED: 275 failsafe_rx_intr_uninstall_subdevice(sdev); 276 rte_eth_dev_stop(PORT_ID(sdev)); 277 sdev->state = DEV_ACTIVE; 278 /* fallthrough */ 279 case DEV_ACTIVE: 280 failsafe_eth_dev_unregister_callbacks(sdev); 281 rte_eth_dev_close(PORT_ID(sdev)); 282 sdev->state = DEV_PROBED; 283 /* fallthrough */ 284 case DEV_PROBED: 285 ret = rte_dev_remove(sdev->dev); 286 if (ret) { 287 ERROR("Bus detach failed for sub_device %u", 288 SUB_ID(sdev)); 289 } else { 290 rte_eth_dev_release_port(ETH(sdev)); 291 } 292 sdev->state = DEV_PARSED; 293 /* fallthrough */ 294 case DEV_PARSED: 295 case DEV_UNDEFINED: 296 sdev->state = DEV_UNDEFINED; 297 sdev->sdev_port_id = RTE_MAX_ETHPORTS; 298 /* the end */ 299 break; 300 } 301 sdev->remove = 0; 302 failsafe_hotplug_alarm_install(fs_dev(sdev)); 303 } 304 305 static void 306 fs_dev_stats_save(struct sub_device *sdev) 307 { 308 struct rte_eth_stats stats; 309 int err; 310 311 /* Attempt to read current stats. */ 312 err = rte_eth_stats_get(PORT_ID(sdev), &stats); 313 if (err) { 314 uint64_t timestamp = sdev->stats_snapshot.timestamp; 315 316 WARN("Could not access latest statistics from sub-device %d.\n", 317 SUB_ID(sdev)); 318 if (timestamp != 0) 319 WARN("Using latest snapshot taken before %"PRIu64" seconds.\n", 320 (rte_rdtsc() - timestamp) / rte_get_tsc_hz()); 321 } 322 failsafe_stats_increment 323 (&PRIV(fs_dev(sdev))->stats_accumulator, 324 err ? &sdev->stats_snapshot.stats : &stats); 325 memset(&sdev->stats_snapshot, 0, sizeof(sdev->stats_snapshot)); 326 } 327 328 static inline int 329 fs_rxtx_clean(struct sub_device *sdev) 330 { 331 uint16_t i; 332 333 for (i = 0; i < ETH(sdev)->data->nb_rx_queues; i++) 334 if (FS_ATOMIC_RX(sdev, i)) 335 return 0; 336 for (i = 0; i < ETH(sdev)->data->nb_tx_queues; i++) 337 if (FS_ATOMIC_TX(sdev, i)) 338 return 0; 339 return 1; 340 } 341 342 void 343 failsafe_eth_dev_unregister_callbacks(struct sub_device *sdev) 344 { 345 int ret; 346 347 if (sdev == NULL) 348 return; 349 if (sdev->rmv_callback) { 350 ret = rte_eth_dev_callback_unregister(PORT_ID(sdev), 351 RTE_ETH_EVENT_INTR_RMV, 352 failsafe_eth_rmv_event_callback, 353 sdev); 354 if (ret) 355 WARN("Failed to unregister RMV callback for sub_device" 356 " %d", SUB_ID(sdev)); 357 sdev->rmv_callback = 0; 358 } 359 if (sdev->lsc_callback) { 360 ret = rte_eth_dev_callback_unregister(PORT_ID(sdev), 361 RTE_ETH_EVENT_INTR_LSC, 362 failsafe_eth_lsc_event_callback, 363 sdev); 364 if (ret) 365 WARN("Failed to unregister LSC callback for sub_device" 366 " %d", SUB_ID(sdev)); 367 sdev->lsc_callback = 0; 368 } 369 } 370 371 void 372 failsafe_dev_remove(struct rte_eth_dev *dev) 373 { 374 struct sub_device *sdev; 375 uint8_t i; 376 377 FOREACH_SUBDEV_STATE(sdev, i, dev, DEV_ACTIVE) 378 if (sdev->remove && fs_rxtx_clean(sdev)) { 379 if (fs_lock(dev, 1) != 0) 380 return; 381 fs_dev_stats_save(sdev); 382 fs_dev_remove(sdev); 383 fs_unlock(dev, 1); 384 } 385 } 386 387 static int 388 failsafe_eth_dev_rx_queues_sync(struct rte_eth_dev *dev) 389 { 390 struct rxq *rxq; 391 int ret; 392 uint16_t i; 393 394 for (i = 0; i < dev->data->nb_rx_queues; i++) { 395 rxq = dev->data->rx_queues[i]; 396 397 if (rxq->info.conf.rx_deferred_start && 398 dev->data->rx_queue_state[i] == 399 RTE_ETH_QUEUE_STATE_STARTED) { 400 /* 401 * The subdevice Rx queue does not launch on device 402 * start if deferred start flag is set. It needs to be 403 * started manually in case an appropriate failsafe Rx 404 * queue has been started earlier. 405 */ 406 ret = dev->dev_ops->rx_queue_start(dev, i); 407 if (ret) { 408 ERROR("Could not synchronize Rx queue %d", i); 409 return ret; 410 } 411 } else if (dev->data->rx_queue_state[i] == 412 RTE_ETH_QUEUE_STATE_STOPPED) { 413 /* 414 * The subdevice Rx queue needs to be stopped manually 415 * in case an appropriate failsafe Rx queue has been 416 * stopped earlier. 417 */ 418 ret = dev->dev_ops->rx_queue_stop(dev, i); 419 if (ret) { 420 ERROR("Could not synchronize Rx queue %d", i); 421 return ret; 422 } 423 } 424 } 425 return 0; 426 } 427 428 static int 429 failsafe_eth_dev_tx_queues_sync(struct rte_eth_dev *dev) 430 { 431 struct txq *txq; 432 int ret; 433 uint16_t i; 434 435 for (i = 0; i < dev->data->nb_tx_queues; i++) { 436 txq = dev->data->tx_queues[i]; 437 438 if (txq->info.conf.tx_deferred_start && 439 dev->data->tx_queue_state[i] == 440 RTE_ETH_QUEUE_STATE_STARTED) { 441 /* 442 * The subdevice Tx queue does not launch on device 443 * start if deferred start flag is set. It needs to be 444 * started manually in case an appropriate failsafe Tx 445 * queue has been started earlier. 446 */ 447 ret = dev->dev_ops->tx_queue_start(dev, i); 448 if (ret) { 449 ERROR("Could not synchronize Tx queue %d", i); 450 return ret; 451 } 452 } else if (dev->data->tx_queue_state[i] == 453 RTE_ETH_QUEUE_STATE_STOPPED) { 454 /* 455 * The subdevice Tx queue needs to be stopped manually 456 * in case an appropriate failsafe Tx queue has been 457 * stopped earlier. 458 */ 459 ret = dev->dev_ops->tx_queue_stop(dev, i); 460 if (ret) { 461 ERROR("Could not synchronize Tx queue %d", i); 462 return ret; 463 } 464 } 465 } 466 return 0; 467 } 468 469 int 470 failsafe_eth_dev_state_sync(struct rte_eth_dev *dev) 471 { 472 struct sub_device *sdev; 473 uint32_t inactive; 474 int ret; 475 uint8_t i; 476 477 if (PRIV(dev)->state < DEV_PARSED) 478 return 0; 479 480 ret = failsafe_args_parse_subs(dev); 481 if (ret) 482 goto err_remove; 483 484 if (PRIV(dev)->state < DEV_PROBED) 485 return 0; 486 ret = failsafe_eal_init(dev); 487 if (ret) 488 goto err_remove; 489 if (PRIV(dev)->state < DEV_ACTIVE) 490 return 0; 491 inactive = 0; 492 FOREACH_SUBDEV(sdev, i, dev) { 493 if (sdev->state == DEV_PROBED) { 494 inactive |= UINT32_C(1) << i; 495 ret = eth_dev_flow_isolate_set(dev, sdev); 496 if (ret) { 497 ERROR("Could not apply configuration to sub_device %d", 498 i); 499 goto err_remove; 500 } 501 } 502 } 503 ret = dev->dev_ops->dev_configure(dev); 504 if (ret) 505 goto err_remove; 506 FOREACH_SUBDEV(sdev, i, dev) { 507 if (inactive & (UINT32_C(1) << i)) { 508 ret = fs_eth_dev_conf_apply(dev, sdev); 509 if (ret) { 510 ERROR("Could not apply configuration to sub_device %d", 511 i); 512 goto err_remove; 513 } 514 } 515 } 516 /* 517 * If new devices have been configured, check if 518 * the link state has changed. 519 */ 520 if (inactive) 521 dev->dev_ops->link_update(dev, 1); 522 if (PRIV(dev)->state < DEV_STARTED) 523 return 0; 524 ret = dev->dev_ops->dev_start(dev); 525 if (ret) 526 goto err_remove; 527 ret = failsafe_eth_dev_rx_queues_sync(dev); 528 if (ret) 529 goto err_remove; 530 ret = failsafe_eth_dev_tx_queues_sync(dev); 531 if (ret) 532 goto err_remove; 533 return 0; 534 err_remove: 535 FOREACH_SUBDEV(sdev, i, dev) 536 if (sdev->state != PRIV(dev)->state) 537 sdev->remove = 1; 538 return ret; 539 } 540 541 void 542 failsafe_stats_increment(struct rte_eth_stats *to, struct rte_eth_stats *from) 543 { 544 uint32_t i; 545 546 RTE_ASSERT(to != NULL && from != NULL); 547 to->ipackets += from->ipackets; 548 to->opackets += from->opackets; 549 to->ibytes += from->ibytes; 550 to->obytes += from->obytes; 551 to->imissed += from->imissed; 552 to->ierrors += from->ierrors; 553 to->oerrors += from->oerrors; 554 to->rx_nombuf += from->rx_nombuf; 555 for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS; i++) { 556 to->q_ipackets[i] += from->q_ipackets[i]; 557 to->q_opackets[i] += from->q_opackets[i]; 558 to->q_ibytes[i] += from->q_ibytes[i]; 559 to->q_obytes[i] += from->q_obytes[i]; 560 to->q_errors[i] += from->q_errors[i]; 561 } 562 } 563 564 int 565 failsafe_eth_rmv_event_callback(uint16_t port_id __rte_unused, 566 enum rte_eth_event_type event __rte_unused, 567 void *cb_arg, void *out __rte_unused) 568 { 569 struct sub_device *sdev = cb_arg; 570 571 fs_lock(fs_dev(sdev), 0); 572 /* Switch as soon as possible tx_dev. */ 573 fs_switch_dev(fs_dev(sdev), sdev); 574 /* Use safe bursts in any case. */ 575 failsafe_set_burst_fn(fs_dev(sdev), 1); 576 /* 577 * Async removal, the sub-PMD will try to unregister 578 * the callback at the source of the current thread context. 579 */ 580 sdev->remove = 1; 581 fs_unlock(fs_dev(sdev), 0); 582 return 0; 583 } 584 585 int 586 failsafe_eth_lsc_event_callback(uint16_t port_id __rte_unused, 587 enum rte_eth_event_type event __rte_unused, 588 void *cb_arg, void *out __rte_unused) 589 { 590 struct rte_eth_dev *dev = cb_arg; 591 int ret; 592 593 ret = dev->dev_ops->link_update(dev, 0); 594 /* We must pass on the LSC event */ 595 if (ret) 596 return _rte_eth_dev_callback_process(dev, 597 RTE_ETH_EVENT_INTR_LSC, 598 NULL); 599 else 600 return 0; 601 } 602 603 /* Take sub-device ownership before it becomes exposed to the application. */ 604 int 605 failsafe_eth_new_event_callback(uint16_t port_id, 606 enum rte_eth_event_type event __rte_unused, 607 void *cb_arg, void *out __rte_unused) 608 { 609 struct rte_eth_dev *fs_dev = cb_arg; 610 struct sub_device *sdev; 611 struct rte_eth_dev *dev = &rte_eth_devices[port_id]; 612 uint8_t i; 613 614 FOREACH_SUBDEV_STATE(sdev, i, fs_dev, DEV_PARSED) { 615 if (sdev->state >= DEV_PROBED) 616 continue; 617 if (strcmp(sdev->devargs.name, dev->device->name) != 0) 618 continue; 619 rte_eth_dev_owner_set(port_id, &PRIV(fs_dev)->my_owner); 620 /* The actual owner will be checked after the port probing. */ 621 break; 622 } 623 return 0; 624 } 625