1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Handling of a single switch port 4 * 5 * Copyright (c) 2017 Savoir-faire Linux Inc. 6 * Vivien Didelot <vivien.didelot@savoirfairelinux.com> 7 */ 8 9 #include <linux/if_bridge.h> 10 #include <linux/notifier.h> 11 #include <linux/of_mdio.h> 12 #include <linux/of_net.h> 13 14 #include "dsa_priv.h" 15 16 /** 17 * dsa_port_notify - Notify the switching fabric of changes to a port 18 * @dp: port on which change occurred 19 * @e: event, must be of type DSA_NOTIFIER_* 20 * @v: event-specific value. 21 * 22 * Notify all switches in the DSA tree that this port's switch belongs to, 23 * including this switch itself, of an event. Allows the other switches to 24 * reconfigure themselves for cross-chip operations. Can also be used to 25 * reconfigure ports without net_devices (CPU ports, DSA links) whenever 26 * a user port's state changes. 27 */ 28 static int dsa_port_notify(const struct dsa_port *dp, unsigned long e, void *v) 29 { 30 return dsa_tree_notify(dp->ds->dst, e, v); 31 } 32 33 static void dsa_port_notify_bridge_fdb_flush(const struct dsa_port *dp) 34 { 35 struct net_device *brport_dev = dsa_port_to_bridge_port(dp); 36 struct switchdev_notifier_fdb_info info = { 37 /* flush all VLANs */ 38 .vid = 0, 39 }; 40 41 /* When the port becomes standalone it has already left the bridge. 42 * Don't notify the bridge in that case. 43 */ 44 if (!brport_dev) 45 return; 46 47 call_switchdev_notifiers(SWITCHDEV_FDB_FLUSH_TO_BRIDGE, 48 brport_dev, &info.info, NULL); 49 } 50 51 static void dsa_port_fast_age(const struct dsa_port *dp) 52 { 53 struct dsa_switch *ds = dp->ds; 54 55 if (!ds->ops->port_fast_age) 56 return; 57 58 ds->ops->port_fast_age(ds, dp->index); 59 60 dsa_port_notify_bridge_fdb_flush(dp); 61 } 62 63 static bool dsa_port_can_configure_learning(struct dsa_port *dp) 64 { 65 struct switchdev_brport_flags flags = { 66 .mask = BR_LEARNING, 67 }; 68 struct dsa_switch *ds = dp->ds; 69 int err; 70 71 if (!ds->ops->port_bridge_flags || !ds->ops->port_pre_bridge_flags) 72 return false; 73 74 err = ds->ops->port_pre_bridge_flags(ds, dp->index, flags, NULL); 75 return !err; 76 } 77 78 int dsa_port_set_state(struct dsa_port *dp, u8 state, bool do_fast_age) 79 { 80 struct dsa_switch *ds = dp->ds; 81 int port = dp->index; 82 83 if (!ds->ops->port_stp_state_set) 84 return -EOPNOTSUPP; 85 86 ds->ops->port_stp_state_set(ds, port, state); 87 88 if (!dsa_port_can_configure_learning(dp) || 89 (do_fast_age && dp->learning)) { 90 /* Fast age FDB entries or flush appropriate forwarding database 91 * for the given port, if we are moving it from Learning or 92 * Forwarding state, to Disabled or Blocking or Listening state. 93 * Ports that were standalone before the STP state change don't 94 * need to fast age the FDB, since address learning is off in 95 * standalone mode. 96 */ 97 98 if ((dp->stp_state == BR_STATE_LEARNING || 99 dp->stp_state == BR_STATE_FORWARDING) && 100 (state == BR_STATE_DISABLED || 101 state == BR_STATE_BLOCKING || 102 state == BR_STATE_LISTENING)) 103 dsa_port_fast_age(dp); 104 } 105 106 dp->stp_state = state; 107 108 return 0; 109 } 110 111 static void dsa_port_set_state_now(struct dsa_port *dp, u8 state, 112 bool do_fast_age) 113 { 114 int err; 115 116 err = dsa_port_set_state(dp, state, do_fast_age); 117 if (err) 118 pr_err("DSA: failed to set STP state %u (%d)\n", state, err); 119 } 120 121 int dsa_port_enable_rt(struct dsa_port *dp, struct phy_device *phy) 122 { 123 struct dsa_switch *ds = dp->ds; 124 int port = dp->index; 125 int err; 126 127 if (ds->ops->port_enable) { 128 err = ds->ops->port_enable(ds, port, phy); 129 if (err) 130 return err; 131 } 132 133 if (!dp->bridge_dev) 134 dsa_port_set_state_now(dp, BR_STATE_FORWARDING, false); 135 136 if (dp->pl) 137 phylink_start(dp->pl); 138 139 return 0; 140 } 141 142 int dsa_port_enable(struct dsa_port *dp, struct phy_device *phy) 143 { 144 int err; 145 146 rtnl_lock(); 147 err = dsa_port_enable_rt(dp, phy); 148 rtnl_unlock(); 149 150 return err; 151 } 152 153 void dsa_port_disable_rt(struct dsa_port *dp) 154 { 155 struct dsa_switch *ds = dp->ds; 156 int port = dp->index; 157 158 if (dp->pl) 159 phylink_stop(dp->pl); 160 161 if (!dp->bridge_dev) 162 dsa_port_set_state_now(dp, BR_STATE_DISABLED, false); 163 164 if (ds->ops->port_disable) 165 ds->ops->port_disable(ds, port); 166 } 167 168 void dsa_port_disable(struct dsa_port *dp) 169 { 170 rtnl_lock(); 171 dsa_port_disable_rt(dp); 172 rtnl_unlock(); 173 } 174 175 static int dsa_port_inherit_brport_flags(struct dsa_port *dp, 176 struct netlink_ext_ack *extack) 177 { 178 const unsigned long mask = BR_LEARNING | BR_FLOOD | BR_MCAST_FLOOD | 179 BR_BCAST_FLOOD; 180 struct net_device *brport_dev = dsa_port_to_bridge_port(dp); 181 int flag, err; 182 183 for_each_set_bit(flag, &mask, 32) { 184 struct switchdev_brport_flags flags = {0}; 185 186 flags.mask = BIT(flag); 187 188 if (br_port_flag_is_set(brport_dev, BIT(flag))) 189 flags.val = BIT(flag); 190 191 err = dsa_port_bridge_flags(dp, flags, extack); 192 if (err && err != -EOPNOTSUPP) 193 return err; 194 } 195 196 return 0; 197 } 198 199 static void dsa_port_clear_brport_flags(struct dsa_port *dp) 200 { 201 const unsigned long val = BR_FLOOD | BR_MCAST_FLOOD | BR_BCAST_FLOOD; 202 const unsigned long mask = BR_LEARNING | BR_FLOOD | BR_MCAST_FLOOD | 203 BR_BCAST_FLOOD; 204 int flag, err; 205 206 for_each_set_bit(flag, &mask, 32) { 207 struct switchdev_brport_flags flags = {0}; 208 209 flags.mask = BIT(flag); 210 flags.val = val & BIT(flag); 211 212 err = dsa_port_bridge_flags(dp, flags, NULL); 213 if (err && err != -EOPNOTSUPP) 214 dev_err(dp->ds->dev, 215 "failed to clear bridge port flag %lu: %pe\n", 216 flags.val, ERR_PTR(err)); 217 } 218 } 219 220 static int dsa_port_switchdev_sync_attrs(struct dsa_port *dp, 221 struct netlink_ext_ack *extack) 222 { 223 struct net_device *brport_dev = dsa_port_to_bridge_port(dp); 224 struct net_device *br = dp->bridge_dev; 225 int err; 226 227 err = dsa_port_inherit_brport_flags(dp, extack); 228 if (err) 229 return err; 230 231 err = dsa_port_set_state(dp, br_port_get_stp_state(brport_dev), false); 232 if (err && err != -EOPNOTSUPP) 233 return err; 234 235 err = dsa_port_vlan_filtering(dp, br_vlan_enabled(br), extack); 236 if (err && err != -EOPNOTSUPP) 237 return err; 238 239 err = dsa_port_ageing_time(dp, br_get_ageing_time(br)); 240 if (err && err != -EOPNOTSUPP) 241 return err; 242 243 return 0; 244 } 245 246 static void dsa_port_switchdev_unsync_attrs(struct dsa_port *dp) 247 { 248 /* Configure the port for standalone mode (no address learning, 249 * flood everything). 250 * The bridge only emits SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS events 251 * when the user requests it through netlink or sysfs, but not 252 * automatically at port join or leave, so we need to handle resetting 253 * the brport flags ourselves. But we even prefer it that way, because 254 * otherwise, some setups might never get the notification they need, 255 * for example, when a port leaves a LAG that offloads the bridge, 256 * it becomes standalone, but as far as the bridge is concerned, no 257 * port ever left. 258 */ 259 dsa_port_clear_brport_flags(dp); 260 261 /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer, 262 * so allow it to be in BR_STATE_FORWARDING to be kept functional 263 */ 264 dsa_port_set_state_now(dp, BR_STATE_FORWARDING, true); 265 266 /* VLAN filtering is handled by dsa_switch_bridge_leave */ 267 268 /* Ageing time may be global to the switch chip, so don't change it 269 * here because we have no good reason (or value) to change it to. 270 */ 271 } 272 273 static void dsa_port_bridge_tx_fwd_unoffload(struct dsa_port *dp, 274 struct net_device *bridge_dev) 275 { 276 int bridge_num = dp->bridge_num; 277 struct dsa_switch *ds = dp->ds; 278 279 /* No bridge TX forwarding offload => do nothing */ 280 if (!ds->ops->port_bridge_tx_fwd_unoffload || dp->bridge_num == -1) 281 return; 282 283 dp->bridge_num = -1; 284 285 dsa_bridge_num_put(bridge_dev, bridge_num); 286 287 /* Notify the chips only once the offload has been deactivated, so 288 * that they can update their configuration accordingly. 289 */ 290 ds->ops->port_bridge_tx_fwd_unoffload(ds, dp->index, bridge_dev, 291 bridge_num); 292 } 293 294 static bool dsa_port_bridge_tx_fwd_offload(struct dsa_port *dp, 295 struct net_device *bridge_dev) 296 { 297 struct dsa_switch *ds = dp->ds; 298 int bridge_num, err; 299 300 if (!ds->ops->port_bridge_tx_fwd_offload) 301 return false; 302 303 bridge_num = dsa_bridge_num_get(bridge_dev, 304 ds->num_fwd_offloading_bridges); 305 if (bridge_num < 0) 306 return false; 307 308 dp->bridge_num = bridge_num; 309 310 /* Notify the driver */ 311 err = ds->ops->port_bridge_tx_fwd_offload(ds, dp->index, bridge_dev, 312 bridge_num); 313 if (err) { 314 dsa_port_bridge_tx_fwd_unoffload(dp, bridge_dev); 315 return false; 316 } 317 318 return true; 319 } 320 321 int dsa_port_bridge_join(struct dsa_port *dp, struct net_device *br, 322 struct netlink_ext_ack *extack) 323 { 324 struct dsa_notifier_bridge_info info = { 325 .tree_index = dp->ds->dst->index, 326 .sw_index = dp->ds->index, 327 .port = dp->index, 328 .br = br, 329 }; 330 struct net_device *dev = dp->slave; 331 struct net_device *brport_dev; 332 bool tx_fwd_offload; 333 int err; 334 335 /* Here the interface is already bridged. Reflect the current 336 * configuration so that drivers can program their chips accordingly. 337 */ 338 dp->bridge_dev = br; 339 340 brport_dev = dsa_port_to_bridge_port(dp); 341 342 err = dsa_broadcast(DSA_NOTIFIER_BRIDGE_JOIN, &info); 343 if (err) 344 goto out_rollback; 345 346 tx_fwd_offload = dsa_port_bridge_tx_fwd_offload(dp, br); 347 348 err = switchdev_bridge_port_offload(brport_dev, dev, dp, 349 &dsa_slave_switchdev_notifier, 350 &dsa_slave_switchdev_blocking_notifier, 351 tx_fwd_offload, extack); 352 if (err) 353 goto out_rollback_unbridge; 354 355 err = dsa_port_switchdev_sync_attrs(dp, extack); 356 if (err) 357 goto out_rollback_unoffload; 358 359 return 0; 360 361 out_rollback_unoffload: 362 switchdev_bridge_port_unoffload(brport_dev, dp, 363 &dsa_slave_switchdev_notifier, 364 &dsa_slave_switchdev_blocking_notifier); 365 out_rollback_unbridge: 366 dsa_broadcast(DSA_NOTIFIER_BRIDGE_LEAVE, &info); 367 out_rollback: 368 dp->bridge_dev = NULL; 369 return err; 370 } 371 372 void dsa_port_pre_bridge_leave(struct dsa_port *dp, struct net_device *br) 373 { 374 struct net_device *brport_dev = dsa_port_to_bridge_port(dp); 375 376 /* Don't try to unoffload something that is not offloaded */ 377 if (!brport_dev) 378 return; 379 380 switchdev_bridge_port_unoffload(brport_dev, dp, 381 &dsa_slave_switchdev_notifier, 382 &dsa_slave_switchdev_blocking_notifier); 383 } 384 385 void dsa_port_bridge_leave(struct dsa_port *dp, struct net_device *br) 386 { 387 struct dsa_notifier_bridge_info info = { 388 .tree_index = dp->ds->dst->index, 389 .sw_index = dp->ds->index, 390 .port = dp->index, 391 .br = br, 392 }; 393 int err; 394 395 /* Here the port is already unbridged. Reflect the current configuration 396 * so that drivers can program their chips accordingly. 397 */ 398 dp->bridge_dev = NULL; 399 400 dsa_port_bridge_tx_fwd_unoffload(dp, br); 401 402 err = dsa_broadcast(DSA_NOTIFIER_BRIDGE_LEAVE, &info); 403 if (err) 404 dev_err(dp->ds->dev, 405 "port %d failed to notify DSA_NOTIFIER_BRIDGE_LEAVE: %pe\n", 406 dp->index, ERR_PTR(err)); 407 408 dsa_port_switchdev_unsync_attrs(dp); 409 } 410 411 int dsa_port_lag_change(struct dsa_port *dp, 412 struct netdev_lag_lower_state_info *linfo) 413 { 414 struct dsa_notifier_lag_info info = { 415 .sw_index = dp->ds->index, 416 .port = dp->index, 417 }; 418 bool tx_enabled; 419 420 if (!dp->lag_dev) 421 return 0; 422 423 /* On statically configured aggregates (e.g. loadbalance 424 * without LACP) ports will always be tx_enabled, even if the 425 * link is down. Thus we require both link_up and tx_enabled 426 * in order to include it in the tx set. 427 */ 428 tx_enabled = linfo->link_up && linfo->tx_enabled; 429 430 if (tx_enabled == dp->lag_tx_enabled) 431 return 0; 432 433 dp->lag_tx_enabled = tx_enabled; 434 435 return dsa_port_notify(dp, DSA_NOTIFIER_LAG_CHANGE, &info); 436 } 437 438 int dsa_port_lag_join(struct dsa_port *dp, struct net_device *lag, 439 struct netdev_lag_upper_info *uinfo, 440 struct netlink_ext_ack *extack) 441 { 442 struct dsa_notifier_lag_info info = { 443 .sw_index = dp->ds->index, 444 .port = dp->index, 445 .lag = lag, 446 .info = uinfo, 447 }; 448 struct net_device *bridge_dev; 449 int err; 450 451 dsa_lag_map(dp->ds->dst, lag); 452 dp->lag_dev = lag; 453 454 err = dsa_port_notify(dp, DSA_NOTIFIER_LAG_JOIN, &info); 455 if (err) 456 goto err_lag_join; 457 458 bridge_dev = netdev_master_upper_dev_get(lag); 459 if (!bridge_dev || !netif_is_bridge_master(bridge_dev)) 460 return 0; 461 462 err = dsa_port_bridge_join(dp, bridge_dev, extack); 463 if (err) 464 goto err_bridge_join; 465 466 return 0; 467 468 err_bridge_join: 469 dsa_port_notify(dp, DSA_NOTIFIER_LAG_LEAVE, &info); 470 err_lag_join: 471 dp->lag_dev = NULL; 472 dsa_lag_unmap(dp->ds->dst, lag); 473 return err; 474 } 475 476 void dsa_port_pre_lag_leave(struct dsa_port *dp, struct net_device *lag) 477 { 478 if (dp->bridge_dev) 479 dsa_port_pre_bridge_leave(dp, dp->bridge_dev); 480 } 481 482 void dsa_port_lag_leave(struct dsa_port *dp, struct net_device *lag) 483 { 484 struct dsa_notifier_lag_info info = { 485 .sw_index = dp->ds->index, 486 .port = dp->index, 487 .lag = lag, 488 }; 489 int err; 490 491 if (!dp->lag_dev) 492 return; 493 494 /* Port might have been part of a LAG that in turn was 495 * attached to a bridge. 496 */ 497 if (dp->bridge_dev) 498 dsa_port_bridge_leave(dp, dp->bridge_dev); 499 500 dp->lag_tx_enabled = false; 501 dp->lag_dev = NULL; 502 503 err = dsa_port_notify(dp, DSA_NOTIFIER_LAG_LEAVE, &info); 504 if (err) 505 dev_err(dp->ds->dev, 506 "port %d failed to notify DSA_NOTIFIER_LAG_LEAVE: %pe\n", 507 dp->index, ERR_PTR(err)); 508 509 dsa_lag_unmap(dp->ds->dst, lag); 510 } 511 512 /* Must be called under rcu_read_lock() */ 513 static bool dsa_port_can_apply_vlan_filtering(struct dsa_port *dp, 514 bool vlan_filtering, 515 struct netlink_ext_ack *extack) 516 { 517 struct dsa_switch *ds = dp->ds; 518 struct dsa_port *other_dp; 519 int err; 520 521 /* VLAN awareness was off, so the question is "can we turn it on". 522 * We may have had 8021q uppers, those need to go. Make sure we don't 523 * enter an inconsistent state: deny changing the VLAN awareness state 524 * as long as we have 8021q uppers. 525 */ 526 if (vlan_filtering && dsa_port_is_user(dp)) { 527 struct net_device *upper_dev, *slave = dp->slave; 528 struct net_device *br = dp->bridge_dev; 529 struct list_head *iter; 530 531 netdev_for_each_upper_dev_rcu(slave, upper_dev, iter) { 532 struct bridge_vlan_info br_info; 533 u16 vid; 534 535 if (!is_vlan_dev(upper_dev)) 536 continue; 537 538 vid = vlan_dev_vlan_id(upper_dev); 539 540 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the 541 * device, respectively the VID is not found, returning 542 * 0 means success, which is a failure for us here. 543 */ 544 err = br_vlan_get_info(br, vid, &br_info); 545 if (err == 0) { 546 NL_SET_ERR_MSG_MOD(extack, 547 "Must first remove VLAN uppers having VIDs also present in bridge"); 548 return false; 549 } 550 } 551 } 552 553 if (!ds->vlan_filtering_is_global) 554 return true; 555 556 /* For cases where enabling/disabling VLAN awareness is global to the 557 * switch, we need to handle the case where multiple bridges span 558 * different ports of the same switch device and one of them has a 559 * different setting than what is being requested. 560 */ 561 dsa_switch_for_each_port(other_dp, ds) { 562 struct net_device *other_bridge; 563 564 other_bridge = other_dp->bridge_dev; 565 if (!other_bridge) 566 continue; 567 /* If it's the same bridge, it also has same 568 * vlan_filtering setting => no need to check 569 */ 570 if (other_bridge == dp->bridge_dev) 571 continue; 572 if (br_vlan_enabled(other_bridge) != vlan_filtering) { 573 NL_SET_ERR_MSG_MOD(extack, 574 "VLAN filtering is a global setting"); 575 return false; 576 } 577 } 578 return true; 579 } 580 581 int dsa_port_vlan_filtering(struct dsa_port *dp, bool vlan_filtering, 582 struct netlink_ext_ack *extack) 583 { 584 bool old_vlan_filtering = dsa_port_is_vlan_filtering(dp); 585 struct dsa_switch *ds = dp->ds; 586 bool apply; 587 int err; 588 589 if (!ds->ops->port_vlan_filtering) 590 return -EOPNOTSUPP; 591 592 /* We are called from dsa_slave_switchdev_blocking_event(), 593 * which is not under rcu_read_lock(), unlike 594 * dsa_slave_switchdev_event(). 595 */ 596 rcu_read_lock(); 597 apply = dsa_port_can_apply_vlan_filtering(dp, vlan_filtering, extack); 598 rcu_read_unlock(); 599 if (!apply) 600 return -EINVAL; 601 602 if (dsa_port_is_vlan_filtering(dp) == vlan_filtering) 603 return 0; 604 605 err = ds->ops->port_vlan_filtering(ds, dp->index, vlan_filtering, 606 extack); 607 if (err) 608 return err; 609 610 if (ds->vlan_filtering_is_global) { 611 struct dsa_port *other_dp; 612 613 ds->vlan_filtering = vlan_filtering; 614 615 dsa_switch_for_each_user_port(other_dp, ds) { 616 struct net_device *slave = dp->slave; 617 618 /* We might be called in the unbind path, so not 619 * all slave devices might still be registered. 620 */ 621 if (!slave) 622 continue; 623 624 err = dsa_slave_manage_vlan_filtering(slave, 625 vlan_filtering); 626 if (err) 627 goto restore; 628 } 629 } else { 630 dp->vlan_filtering = vlan_filtering; 631 632 err = dsa_slave_manage_vlan_filtering(dp->slave, 633 vlan_filtering); 634 if (err) 635 goto restore; 636 } 637 638 return 0; 639 640 restore: 641 ds->ops->port_vlan_filtering(ds, dp->index, old_vlan_filtering, NULL); 642 643 if (ds->vlan_filtering_is_global) 644 ds->vlan_filtering = old_vlan_filtering; 645 else 646 dp->vlan_filtering = old_vlan_filtering; 647 648 return err; 649 } 650 651 /* This enforces legacy behavior for switch drivers which assume they can't 652 * receive VLAN configuration when enslaved to a bridge with vlan_filtering=0 653 */ 654 bool dsa_port_skip_vlan_configuration(struct dsa_port *dp) 655 { 656 struct dsa_switch *ds = dp->ds; 657 658 if (!dp->bridge_dev) 659 return false; 660 661 return (!ds->configure_vlan_while_not_filtering && 662 !br_vlan_enabled(dp->bridge_dev)); 663 } 664 665 int dsa_port_ageing_time(struct dsa_port *dp, clock_t ageing_clock) 666 { 667 unsigned long ageing_jiffies = clock_t_to_jiffies(ageing_clock); 668 unsigned int ageing_time = jiffies_to_msecs(ageing_jiffies); 669 struct dsa_notifier_ageing_time_info info; 670 int err; 671 672 info.ageing_time = ageing_time; 673 674 err = dsa_port_notify(dp, DSA_NOTIFIER_AGEING_TIME, &info); 675 if (err) 676 return err; 677 678 dp->ageing_time = ageing_time; 679 680 return 0; 681 } 682 683 int dsa_port_pre_bridge_flags(const struct dsa_port *dp, 684 struct switchdev_brport_flags flags, 685 struct netlink_ext_ack *extack) 686 { 687 struct dsa_switch *ds = dp->ds; 688 689 if (!ds->ops->port_pre_bridge_flags) 690 return -EINVAL; 691 692 return ds->ops->port_pre_bridge_flags(ds, dp->index, flags, extack); 693 } 694 695 int dsa_port_bridge_flags(struct dsa_port *dp, 696 struct switchdev_brport_flags flags, 697 struct netlink_ext_ack *extack) 698 { 699 struct dsa_switch *ds = dp->ds; 700 int err; 701 702 if (!ds->ops->port_bridge_flags) 703 return -EOPNOTSUPP; 704 705 err = ds->ops->port_bridge_flags(ds, dp->index, flags, extack); 706 if (err) 707 return err; 708 709 if (flags.mask & BR_LEARNING) { 710 bool learning = flags.val & BR_LEARNING; 711 712 if (learning == dp->learning) 713 return 0; 714 715 if ((dp->learning && !learning) && 716 (dp->stp_state == BR_STATE_LEARNING || 717 dp->stp_state == BR_STATE_FORWARDING)) 718 dsa_port_fast_age(dp); 719 720 dp->learning = learning; 721 } 722 723 return 0; 724 } 725 726 int dsa_port_mtu_change(struct dsa_port *dp, int new_mtu, 727 bool targeted_match) 728 { 729 struct dsa_notifier_mtu_info info = { 730 .sw_index = dp->ds->index, 731 .targeted_match = targeted_match, 732 .port = dp->index, 733 .mtu = new_mtu, 734 }; 735 736 return dsa_port_notify(dp, DSA_NOTIFIER_MTU, &info); 737 } 738 739 int dsa_port_fdb_add(struct dsa_port *dp, const unsigned char *addr, 740 u16 vid) 741 { 742 struct dsa_notifier_fdb_info info = { 743 .sw_index = dp->ds->index, 744 .port = dp->index, 745 .addr = addr, 746 .vid = vid, 747 }; 748 749 return dsa_port_notify(dp, DSA_NOTIFIER_FDB_ADD, &info); 750 } 751 752 int dsa_port_fdb_del(struct dsa_port *dp, const unsigned char *addr, 753 u16 vid) 754 { 755 struct dsa_notifier_fdb_info info = { 756 .sw_index = dp->ds->index, 757 .port = dp->index, 758 .addr = addr, 759 .vid = vid, 760 761 }; 762 763 return dsa_port_notify(dp, DSA_NOTIFIER_FDB_DEL, &info); 764 } 765 766 int dsa_port_host_fdb_add(struct dsa_port *dp, const unsigned char *addr, 767 u16 vid) 768 { 769 struct dsa_notifier_fdb_info info = { 770 .sw_index = dp->ds->index, 771 .port = dp->index, 772 .addr = addr, 773 .vid = vid, 774 }; 775 struct dsa_port *cpu_dp = dp->cpu_dp; 776 int err; 777 778 err = dev_uc_add(cpu_dp->master, addr); 779 if (err) 780 return err; 781 782 return dsa_port_notify(dp, DSA_NOTIFIER_HOST_FDB_ADD, &info); 783 } 784 785 int dsa_port_host_fdb_del(struct dsa_port *dp, const unsigned char *addr, 786 u16 vid) 787 { 788 struct dsa_notifier_fdb_info info = { 789 .sw_index = dp->ds->index, 790 .port = dp->index, 791 .addr = addr, 792 .vid = vid, 793 }; 794 struct dsa_port *cpu_dp = dp->cpu_dp; 795 int err; 796 797 err = dev_uc_del(cpu_dp->master, addr); 798 if (err) 799 return err; 800 801 return dsa_port_notify(dp, DSA_NOTIFIER_HOST_FDB_DEL, &info); 802 } 803 804 int dsa_port_fdb_dump(struct dsa_port *dp, dsa_fdb_dump_cb_t *cb, void *data) 805 { 806 struct dsa_switch *ds = dp->ds; 807 int port = dp->index; 808 809 if (!ds->ops->port_fdb_dump) 810 return -EOPNOTSUPP; 811 812 return ds->ops->port_fdb_dump(ds, port, cb, data); 813 } 814 815 int dsa_port_mdb_add(const struct dsa_port *dp, 816 const struct switchdev_obj_port_mdb *mdb) 817 { 818 struct dsa_notifier_mdb_info info = { 819 .sw_index = dp->ds->index, 820 .port = dp->index, 821 .mdb = mdb, 822 }; 823 824 return dsa_port_notify(dp, DSA_NOTIFIER_MDB_ADD, &info); 825 } 826 827 int dsa_port_mdb_del(const struct dsa_port *dp, 828 const struct switchdev_obj_port_mdb *mdb) 829 { 830 struct dsa_notifier_mdb_info info = { 831 .sw_index = dp->ds->index, 832 .port = dp->index, 833 .mdb = mdb, 834 }; 835 836 return dsa_port_notify(dp, DSA_NOTIFIER_MDB_DEL, &info); 837 } 838 839 int dsa_port_host_mdb_add(const struct dsa_port *dp, 840 const struct switchdev_obj_port_mdb *mdb) 841 { 842 struct dsa_notifier_mdb_info info = { 843 .sw_index = dp->ds->index, 844 .port = dp->index, 845 .mdb = mdb, 846 }; 847 struct dsa_port *cpu_dp = dp->cpu_dp; 848 int err; 849 850 err = dev_mc_add(cpu_dp->master, mdb->addr); 851 if (err) 852 return err; 853 854 return dsa_port_notify(dp, DSA_NOTIFIER_HOST_MDB_ADD, &info); 855 } 856 857 int dsa_port_host_mdb_del(const struct dsa_port *dp, 858 const struct switchdev_obj_port_mdb *mdb) 859 { 860 struct dsa_notifier_mdb_info info = { 861 .sw_index = dp->ds->index, 862 .port = dp->index, 863 .mdb = mdb, 864 }; 865 struct dsa_port *cpu_dp = dp->cpu_dp; 866 int err; 867 868 err = dev_mc_del(cpu_dp->master, mdb->addr); 869 if (err) 870 return err; 871 872 return dsa_port_notify(dp, DSA_NOTIFIER_HOST_MDB_DEL, &info); 873 } 874 875 int dsa_port_vlan_add(struct dsa_port *dp, 876 const struct switchdev_obj_port_vlan *vlan, 877 struct netlink_ext_ack *extack) 878 { 879 struct dsa_notifier_vlan_info info = { 880 .sw_index = dp->ds->index, 881 .port = dp->index, 882 .vlan = vlan, 883 .extack = extack, 884 }; 885 886 return dsa_port_notify(dp, DSA_NOTIFIER_VLAN_ADD, &info); 887 } 888 889 int dsa_port_vlan_del(struct dsa_port *dp, 890 const struct switchdev_obj_port_vlan *vlan) 891 { 892 struct dsa_notifier_vlan_info info = { 893 .sw_index = dp->ds->index, 894 .port = dp->index, 895 .vlan = vlan, 896 }; 897 898 return dsa_port_notify(dp, DSA_NOTIFIER_VLAN_DEL, &info); 899 } 900 901 int dsa_port_mrp_add(const struct dsa_port *dp, 902 const struct switchdev_obj_mrp *mrp) 903 { 904 struct dsa_notifier_mrp_info info = { 905 .sw_index = dp->ds->index, 906 .port = dp->index, 907 .mrp = mrp, 908 }; 909 910 return dsa_port_notify(dp, DSA_NOTIFIER_MRP_ADD, &info); 911 } 912 913 int dsa_port_mrp_del(const struct dsa_port *dp, 914 const struct switchdev_obj_mrp *mrp) 915 { 916 struct dsa_notifier_mrp_info info = { 917 .sw_index = dp->ds->index, 918 .port = dp->index, 919 .mrp = mrp, 920 }; 921 922 return dsa_port_notify(dp, DSA_NOTIFIER_MRP_DEL, &info); 923 } 924 925 int dsa_port_mrp_add_ring_role(const struct dsa_port *dp, 926 const struct switchdev_obj_ring_role_mrp *mrp) 927 { 928 struct dsa_notifier_mrp_ring_role_info info = { 929 .sw_index = dp->ds->index, 930 .port = dp->index, 931 .mrp = mrp, 932 }; 933 934 return dsa_port_notify(dp, DSA_NOTIFIER_MRP_ADD_RING_ROLE, &info); 935 } 936 937 int dsa_port_mrp_del_ring_role(const struct dsa_port *dp, 938 const struct switchdev_obj_ring_role_mrp *mrp) 939 { 940 struct dsa_notifier_mrp_ring_role_info info = { 941 .sw_index = dp->ds->index, 942 .port = dp->index, 943 .mrp = mrp, 944 }; 945 946 return dsa_port_notify(dp, DSA_NOTIFIER_MRP_DEL_RING_ROLE, &info); 947 } 948 949 void dsa_port_set_tag_protocol(struct dsa_port *cpu_dp, 950 const struct dsa_device_ops *tag_ops) 951 { 952 cpu_dp->rcv = tag_ops->rcv; 953 cpu_dp->tag_ops = tag_ops; 954 } 955 956 static struct phy_device *dsa_port_get_phy_device(struct dsa_port *dp) 957 { 958 struct device_node *phy_dn; 959 struct phy_device *phydev; 960 961 phy_dn = of_parse_phandle(dp->dn, "phy-handle", 0); 962 if (!phy_dn) 963 return NULL; 964 965 phydev = of_phy_find_device(phy_dn); 966 if (!phydev) { 967 of_node_put(phy_dn); 968 return ERR_PTR(-EPROBE_DEFER); 969 } 970 971 of_node_put(phy_dn); 972 return phydev; 973 } 974 975 static void dsa_port_phylink_validate(struct phylink_config *config, 976 unsigned long *supported, 977 struct phylink_link_state *state) 978 { 979 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config); 980 struct dsa_switch *ds = dp->ds; 981 982 if (!ds->ops->phylink_validate) 983 return; 984 985 ds->ops->phylink_validate(ds, dp->index, supported, state); 986 } 987 988 static void dsa_port_phylink_mac_pcs_get_state(struct phylink_config *config, 989 struct phylink_link_state *state) 990 { 991 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config); 992 struct dsa_switch *ds = dp->ds; 993 int err; 994 995 /* Only called for inband modes */ 996 if (!ds->ops->phylink_mac_link_state) { 997 state->link = 0; 998 return; 999 } 1000 1001 err = ds->ops->phylink_mac_link_state(ds, dp->index, state); 1002 if (err < 0) { 1003 dev_err(ds->dev, "p%d: phylink_mac_link_state() failed: %d\n", 1004 dp->index, err); 1005 state->link = 0; 1006 } 1007 } 1008 1009 static void dsa_port_phylink_mac_config(struct phylink_config *config, 1010 unsigned int mode, 1011 const struct phylink_link_state *state) 1012 { 1013 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config); 1014 struct dsa_switch *ds = dp->ds; 1015 1016 if (!ds->ops->phylink_mac_config) 1017 return; 1018 1019 ds->ops->phylink_mac_config(ds, dp->index, mode, state); 1020 } 1021 1022 static void dsa_port_phylink_mac_an_restart(struct phylink_config *config) 1023 { 1024 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config); 1025 struct dsa_switch *ds = dp->ds; 1026 1027 if (!ds->ops->phylink_mac_an_restart) 1028 return; 1029 1030 ds->ops->phylink_mac_an_restart(ds, dp->index); 1031 } 1032 1033 static void dsa_port_phylink_mac_link_down(struct phylink_config *config, 1034 unsigned int mode, 1035 phy_interface_t interface) 1036 { 1037 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config); 1038 struct phy_device *phydev = NULL; 1039 struct dsa_switch *ds = dp->ds; 1040 1041 if (dsa_port_is_user(dp)) 1042 phydev = dp->slave->phydev; 1043 1044 if (!ds->ops->phylink_mac_link_down) { 1045 if (ds->ops->adjust_link && phydev) 1046 ds->ops->adjust_link(ds, dp->index, phydev); 1047 return; 1048 } 1049 1050 ds->ops->phylink_mac_link_down(ds, dp->index, mode, interface); 1051 } 1052 1053 static void dsa_port_phylink_mac_link_up(struct phylink_config *config, 1054 struct phy_device *phydev, 1055 unsigned int mode, 1056 phy_interface_t interface, 1057 int speed, int duplex, 1058 bool tx_pause, bool rx_pause) 1059 { 1060 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config); 1061 struct dsa_switch *ds = dp->ds; 1062 1063 if (!ds->ops->phylink_mac_link_up) { 1064 if (ds->ops->adjust_link && phydev) 1065 ds->ops->adjust_link(ds, dp->index, phydev); 1066 return; 1067 } 1068 1069 ds->ops->phylink_mac_link_up(ds, dp->index, mode, interface, phydev, 1070 speed, duplex, tx_pause, rx_pause); 1071 } 1072 1073 const struct phylink_mac_ops dsa_port_phylink_mac_ops = { 1074 .validate = dsa_port_phylink_validate, 1075 .mac_pcs_get_state = dsa_port_phylink_mac_pcs_get_state, 1076 .mac_config = dsa_port_phylink_mac_config, 1077 .mac_an_restart = dsa_port_phylink_mac_an_restart, 1078 .mac_link_down = dsa_port_phylink_mac_link_down, 1079 .mac_link_up = dsa_port_phylink_mac_link_up, 1080 }; 1081 1082 static int dsa_port_setup_phy_of(struct dsa_port *dp, bool enable) 1083 { 1084 struct dsa_switch *ds = dp->ds; 1085 struct phy_device *phydev; 1086 int port = dp->index; 1087 int err = 0; 1088 1089 phydev = dsa_port_get_phy_device(dp); 1090 if (!phydev) 1091 return 0; 1092 1093 if (IS_ERR(phydev)) 1094 return PTR_ERR(phydev); 1095 1096 if (enable) { 1097 err = genphy_resume(phydev); 1098 if (err < 0) 1099 goto err_put_dev; 1100 1101 err = genphy_read_status(phydev); 1102 if (err < 0) 1103 goto err_put_dev; 1104 } else { 1105 err = genphy_suspend(phydev); 1106 if (err < 0) 1107 goto err_put_dev; 1108 } 1109 1110 if (ds->ops->adjust_link) 1111 ds->ops->adjust_link(ds, port, phydev); 1112 1113 dev_dbg(ds->dev, "enabled port's phy: %s", phydev_name(phydev)); 1114 1115 err_put_dev: 1116 put_device(&phydev->mdio.dev); 1117 return err; 1118 } 1119 1120 static int dsa_port_fixed_link_register_of(struct dsa_port *dp) 1121 { 1122 struct device_node *dn = dp->dn; 1123 struct dsa_switch *ds = dp->ds; 1124 struct phy_device *phydev; 1125 int port = dp->index; 1126 phy_interface_t mode; 1127 int err; 1128 1129 err = of_phy_register_fixed_link(dn); 1130 if (err) { 1131 dev_err(ds->dev, 1132 "failed to register the fixed PHY of port %d\n", 1133 port); 1134 return err; 1135 } 1136 1137 phydev = of_phy_find_device(dn); 1138 1139 err = of_get_phy_mode(dn, &mode); 1140 if (err) 1141 mode = PHY_INTERFACE_MODE_NA; 1142 phydev->interface = mode; 1143 1144 genphy_read_status(phydev); 1145 1146 if (ds->ops->adjust_link) 1147 ds->ops->adjust_link(ds, port, phydev); 1148 1149 put_device(&phydev->mdio.dev); 1150 1151 return 0; 1152 } 1153 1154 static int dsa_port_phylink_register(struct dsa_port *dp) 1155 { 1156 struct dsa_switch *ds = dp->ds; 1157 struct device_node *port_dn = dp->dn; 1158 phy_interface_t mode; 1159 int err; 1160 1161 err = of_get_phy_mode(port_dn, &mode); 1162 if (err) 1163 mode = PHY_INTERFACE_MODE_NA; 1164 1165 dp->pl_config.dev = ds->dev; 1166 dp->pl_config.type = PHYLINK_DEV; 1167 dp->pl_config.pcs_poll = ds->pcs_poll; 1168 1169 dp->pl = phylink_create(&dp->pl_config, of_fwnode_handle(port_dn), 1170 mode, &dsa_port_phylink_mac_ops); 1171 if (IS_ERR(dp->pl)) { 1172 pr_err("error creating PHYLINK: %ld\n", PTR_ERR(dp->pl)); 1173 return PTR_ERR(dp->pl); 1174 } 1175 1176 err = phylink_of_phy_connect(dp->pl, port_dn, 0); 1177 if (err && err != -ENODEV) { 1178 pr_err("could not attach to PHY: %d\n", err); 1179 goto err_phy_connect; 1180 } 1181 1182 return 0; 1183 1184 err_phy_connect: 1185 phylink_destroy(dp->pl); 1186 return err; 1187 } 1188 1189 int dsa_port_link_register_of(struct dsa_port *dp) 1190 { 1191 struct dsa_switch *ds = dp->ds; 1192 struct device_node *phy_np; 1193 int port = dp->index; 1194 1195 if (!ds->ops->adjust_link) { 1196 phy_np = of_parse_phandle(dp->dn, "phy-handle", 0); 1197 if (of_phy_is_fixed_link(dp->dn) || phy_np) { 1198 if (ds->ops->phylink_mac_link_down) 1199 ds->ops->phylink_mac_link_down(ds, port, 1200 MLO_AN_FIXED, PHY_INTERFACE_MODE_NA); 1201 return dsa_port_phylink_register(dp); 1202 } 1203 return 0; 1204 } 1205 1206 dev_warn(ds->dev, 1207 "Using legacy PHYLIB callbacks. Please migrate to PHYLINK!\n"); 1208 1209 if (of_phy_is_fixed_link(dp->dn)) 1210 return dsa_port_fixed_link_register_of(dp); 1211 else 1212 return dsa_port_setup_phy_of(dp, true); 1213 } 1214 1215 void dsa_port_link_unregister_of(struct dsa_port *dp) 1216 { 1217 struct dsa_switch *ds = dp->ds; 1218 1219 if (!ds->ops->adjust_link && dp->pl) { 1220 rtnl_lock(); 1221 phylink_disconnect_phy(dp->pl); 1222 rtnl_unlock(); 1223 phylink_destroy(dp->pl); 1224 dp->pl = NULL; 1225 return; 1226 } 1227 1228 if (of_phy_is_fixed_link(dp->dn)) 1229 of_phy_deregister_fixed_link(dp->dn); 1230 else 1231 dsa_port_setup_phy_of(dp, false); 1232 } 1233 1234 int dsa_port_get_phy_strings(struct dsa_port *dp, uint8_t *data) 1235 { 1236 struct phy_device *phydev; 1237 int ret = -EOPNOTSUPP; 1238 1239 if (of_phy_is_fixed_link(dp->dn)) 1240 return ret; 1241 1242 phydev = dsa_port_get_phy_device(dp); 1243 if (IS_ERR_OR_NULL(phydev)) 1244 return ret; 1245 1246 ret = phy_ethtool_get_strings(phydev, data); 1247 put_device(&phydev->mdio.dev); 1248 1249 return ret; 1250 } 1251 EXPORT_SYMBOL_GPL(dsa_port_get_phy_strings); 1252 1253 int dsa_port_get_ethtool_phy_stats(struct dsa_port *dp, uint64_t *data) 1254 { 1255 struct phy_device *phydev; 1256 int ret = -EOPNOTSUPP; 1257 1258 if (of_phy_is_fixed_link(dp->dn)) 1259 return ret; 1260 1261 phydev = dsa_port_get_phy_device(dp); 1262 if (IS_ERR_OR_NULL(phydev)) 1263 return ret; 1264 1265 ret = phy_ethtool_get_stats(phydev, NULL, data); 1266 put_device(&phydev->mdio.dev); 1267 1268 return ret; 1269 } 1270 EXPORT_SYMBOL_GPL(dsa_port_get_ethtool_phy_stats); 1271 1272 int dsa_port_get_phy_sset_count(struct dsa_port *dp) 1273 { 1274 struct phy_device *phydev; 1275 int ret = -EOPNOTSUPP; 1276 1277 if (of_phy_is_fixed_link(dp->dn)) 1278 return ret; 1279 1280 phydev = dsa_port_get_phy_device(dp); 1281 if (IS_ERR_OR_NULL(phydev)) 1282 return ret; 1283 1284 ret = phy_ethtool_get_sset_count(phydev); 1285 put_device(&phydev->mdio.dev); 1286 1287 return ret; 1288 } 1289 EXPORT_SYMBOL_GPL(dsa_port_get_phy_sset_count); 1290 1291 int dsa_port_hsr_join(struct dsa_port *dp, struct net_device *hsr) 1292 { 1293 struct dsa_notifier_hsr_info info = { 1294 .sw_index = dp->ds->index, 1295 .port = dp->index, 1296 .hsr = hsr, 1297 }; 1298 int err; 1299 1300 dp->hsr_dev = hsr; 1301 1302 err = dsa_port_notify(dp, DSA_NOTIFIER_HSR_JOIN, &info); 1303 if (err) 1304 dp->hsr_dev = NULL; 1305 1306 return err; 1307 } 1308 1309 void dsa_port_hsr_leave(struct dsa_port *dp, struct net_device *hsr) 1310 { 1311 struct dsa_notifier_hsr_info info = { 1312 .sw_index = dp->ds->index, 1313 .port = dp->index, 1314 .hsr = hsr, 1315 }; 1316 int err; 1317 1318 dp->hsr_dev = NULL; 1319 1320 err = dsa_port_notify(dp, DSA_NOTIFIER_HSR_LEAVE, &info); 1321 if (err) 1322 dev_err(dp->ds->dev, 1323 "port %d failed to notify DSA_NOTIFIER_HSR_LEAVE: %pe\n", 1324 dp->index, ERR_PTR(err)); 1325 } 1326 1327 int dsa_port_tag_8021q_vlan_add(struct dsa_port *dp, u16 vid, bool broadcast) 1328 { 1329 struct dsa_notifier_tag_8021q_vlan_info info = { 1330 .tree_index = dp->ds->dst->index, 1331 .sw_index = dp->ds->index, 1332 .port = dp->index, 1333 .vid = vid, 1334 }; 1335 1336 if (broadcast) 1337 return dsa_broadcast(DSA_NOTIFIER_TAG_8021Q_VLAN_ADD, &info); 1338 1339 return dsa_port_notify(dp, DSA_NOTIFIER_TAG_8021Q_VLAN_ADD, &info); 1340 } 1341 1342 void dsa_port_tag_8021q_vlan_del(struct dsa_port *dp, u16 vid, bool broadcast) 1343 { 1344 struct dsa_notifier_tag_8021q_vlan_info info = { 1345 .tree_index = dp->ds->dst->index, 1346 .sw_index = dp->ds->index, 1347 .port = dp->index, 1348 .vid = vid, 1349 }; 1350 int err; 1351 1352 if (broadcast) 1353 err = dsa_broadcast(DSA_NOTIFIER_TAG_8021Q_VLAN_DEL, &info); 1354 else 1355 err = dsa_port_notify(dp, DSA_NOTIFIER_TAG_8021Q_VLAN_DEL, &info); 1356 if (err) 1357 dev_err(dp->ds->dev, 1358 "port %d failed to notify tag_8021q VLAN %d deletion: %pe\n", 1359 dp->index, vid, ERR_PTR(err)); 1360 } 1361