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) 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) 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 = dsa_port_bridge_dev_get(dp); 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 int dsa_port_bridge_create(struct dsa_port *dp, 274 struct net_device *br, 275 struct netlink_ext_ack *extack) 276 { 277 struct dsa_switch *ds = dp->ds; 278 struct dsa_bridge *bridge; 279 280 bridge = dsa_tree_bridge_find(ds->dst, br); 281 if (bridge) { 282 refcount_inc(&bridge->refcount); 283 dp->bridge = bridge; 284 return 0; 285 } 286 287 bridge = kzalloc(sizeof(*bridge), GFP_KERNEL); 288 if (!bridge) 289 return -ENOMEM; 290 291 refcount_set(&bridge->refcount, 1); 292 293 bridge->dev = br; 294 295 bridge->num = dsa_bridge_num_get(br, ds->max_num_bridges); 296 if (ds->max_num_bridges && !bridge->num) { 297 NL_SET_ERR_MSG_MOD(extack, 298 "Range of offloadable bridges exceeded"); 299 kfree(bridge); 300 return -EOPNOTSUPP; 301 } 302 303 dp->bridge = bridge; 304 305 return 0; 306 } 307 308 static void dsa_port_bridge_destroy(struct dsa_port *dp, 309 const struct net_device *br) 310 { 311 struct dsa_bridge *bridge = dp->bridge; 312 313 dp->bridge = NULL; 314 315 if (!refcount_dec_and_test(&bridge->refcount)) 316 return; 317 318 if (bridge->num) 319 dsa_bridge_num_put(br, bridge->num); 320 321 kfree(bridge); 322 } 323 324 int dsa_port_bridge_join(struct dsa_port *dp, struct net_device *br, 325 struct netlink_ext_ack *extack) 326 { 327 struct dsa_notifier_bridge_info info = { 328 .tree_index = dp->ds->dst->index, 329 .sw_index = dp->ds->index, 330 .port = dp->index, 331 }; 332 struct net_device *dev = dp->slave; 333 struct net_device *brport_dev; 334 int err; 335 336 /* Here the interface is already bridged. Reflect the current 337 * configuration so that drivers can program their chips accordingly. 338 */ 339 err = dsa_port_bridge_create(dp, br, extack); 340 if (err) 341 return err; 342 343 brport_dev = dsa_port_to_bridge_port(dp); 344 345 info.bridge = *dp->bridge; 346 err = dsa_broadcast(DSA_NOTIFIER_BRIDGE_JOIN, &info); 347 if (err) 348 goto out_rollback; 349 350 /* Drivers which support bridge TX forwarding should set this */ 351 dp->bridge->tx_fwd_offload = info.tx_fwd_offload; 352 353 err = switchdev_bridge_port_offload(brport_dev, dev, dp, 354 &dsa_slave_switchdev_notifier, 355 &dsa_slave_switchdev_blocking_notifier, 356 dp->bridge->tx_fwd_offload, extack); 357 if (err) 358 goto out_rollback_unbridge; 359 360 err = dsa_port_switchdev_sync_attrs(dp, extack); 361 if (err) 362 goto out_rollback_unoffload; 363 364 return 0; 365 366 out_rollback_unoffload: 367 switchdev_bridge_port_unoffload(brport_dev, dp, 368 &dsa_slave_switchdev_notifier, 369 &dsa_slave_switchdev_blocking_notifier); 370 out_rollback_unbridge: 371 dsa_broadcast(DSA_NOTIFIER_BRIDGE_LEAVE, &info); 372 out_rollback: 373 dsa_port_bridge_destroy(dp, br); 374 return err; 375 } 376 377 void dsa_port_pre_bridge_leave(struct dsa_port *dp, struct net_device *br) 378 { 379 struct net_device *brport_dev = dsa_port_to_bridge_port(dp); 380 381 /* Don't try to unoffload something that is not offloaded */ 382 if (!brport_dev) 383 return; 384 385 switchdev_bridge_port_unoffload(brport_dev, dp, 386 &dsa_slave_switchdev_notifier, 387 &dsa_slave_switchdev_blocking_notifier); 388 389 dsa_flush_workqueue(); 390 } 391 392 void dsa_port_bridge_leave(struct dsa_port *dp, struct net_device *br) 393 { 394 struct dsa_notifier_bridge_info info = { 395 .tree_index = dp->ds->dst->index, 396 .sw_index = dp->ds->index, 397 .port = dp->index, 398 .bridge = *dp->bridge, 399 }; 400 int err; 401 402 /* Here the port is already unbridged. Reflect the current configuration 403 * so that drivers can program their chips accordingly. 404 */ 405 dsa_port_bridge_destroy(dp, br); 406 407 err = dsa_broadcast(DSA_NOTIFIER_BRIDGE_LEAVE, &info); 408 if (err) 409 dev_err(dp->ds->dev, 410 "port %d failed to notify DSA_NOTIFIER_BRIDGE_LEAVE: %pe\n", 411 dp->index, ERR_PTR(err)); 412 413 dsa_port_switchdev_unsync_attrs(dp); 414 } 415 416 int dsa_port_lag_change(struct dsa_port *dp, 417 struct netdev_lag_lower_state_info *linfo) 418 { 419 struct dsa_notifier_lag_info info = { 420 .sw_index = dp->ds->index, 421 .port = dp->index, 422 }; 423 bool tx_enabled; 424 425 if (!dp->lag_dev) 426 return 0; 427 428 /* On statically configured aggregates (e.g. loadbalance 429 * without LACP) ports will always be tx_enabled, even if the 430 * link is down. Thus we require both link_up and tx_enabled 431 * in order to include it in the tx set. 432 */ 433 tx_enabled = linfo->link_up && linfo->tx_enabled; 434 435 if (tx_enabled == dp->lag_tx_enabled) 436 return 0; 437 438 dp->lag_tx_enabled = tx_enabled; 439 440 return dsa_port_notify(dp, DSA_NOTIFIER_LAG_CHANGE, &info); 441 } 442 443 int dsa_port_lag_join(struct dsa_port *dp, struct net_device *lag, 444 struct netdev_lag_upper_info *uinfo, 445 struct netlink_ext_ack *extack) 446 { 447 struct dsa_notifier_lag_info info = { 448 .sw_index = dp->ds->index, 449 .port = dp->index, 450 .lag = lag, 451 .info = uinfo, 452 }; 453 struct net_device *bridge_dev; 454 int err; 455 456 dsa_lag_map(dp->ds->dst, lag); 457 dp->lag_dev = lag; 458 459 err = dsa_port_notify(dp, DSA_NOTIFIER_LAG_JOIN, &info); 460 if (err) 461 goto err_lag_join; 462 463 bridge_dev = netdev_master_upper_dev_get(lag); 464 if (!bridge_dev || !netif_is_bridge_master(bridge_dev)) 465 return 0; 466 467 err = dsa_port_bridge_join(dp, bridge_dev, extack); 468 if (err) 469 goto err_bridge_join; 470 471 return 0; 472 473 err_bridge_join: 474 dsa_port_notify(dp, DSA_NOTIFIER_LAG_LEAVE, &info); 475 err_lag_join: 476 dp->lag_dev = NULL; 477 dsa_lag_unmap(dp->ds->dst, lag); 478 return err; 479 } 480 481 void dsa_port_pre_lag_leave(struct dsa_port *dp, struct net_device *lag) 482 { 483 struct net_device *br = dsa_port_bridge_dev_get(dp); 484 485 if (br) 486 dsa_port_pre_bridge_leave(dp, br); 487 } 488 489 void dsa_port_lag_leave(struct dsa_port *dp, struct net_device *lag) 490 { 491 struct net_device *br = dsa_port_bridge_dev_get(dp); 492 struct dsa_notifier_lag_info info = { 493 .sw_index = dp->ds->index, 494 .port = dp->index, 495 .lag = lag, 496 }; 497 int err; 498 499 if (!dp->lag_dev) 500 return; 501 502 /* Port might have been part of a LAG that in turn was 503 * attached to a bridge. 504 */ 505 if (br) 506 dsa_port_bridge_leave(dp, br); 507 508 dp->lag_tx_enabled = false; 509 dp->lag_dev = NULL; 510 511 err = dsa_port_notify(dp, DSA_NOTIFIER_LAG_LEAVE, &info); 512 if (err) 513 dev_err(dp->ds->dev, 514 "port %d failed to notify DSA_NOTIFIER_LAG_LEAVE: %pe\n", 515 dp->index, ERR_PTR(err)); 516 517 dsa_lag_unmap(dp->ds->dst, lag); 518 } 519 520 /* Must be called under rcu_read_lock() */ 521 static bool dsa_port_can_apply_vlan_filtering(struct dsa_port *dp, 522 bool vlan_filtering, 523 struct netlink_ext_ack *extack) 524 { 525 struct dsa_switch *ds = dp->ds; 526 struct dsa_port *other_dp; 527 int err; 528 529 /* VLAN awareness was off, so the question is "can we turn it on". 530 * We may have had 8021q uppers, those need to go. Make sure we don't 531 * enter an inconsistent state: deny changing the VLAN awareness state 532 * as long as we have 8021q uppers. 533 */ 534 if (vlan_filtering && dsa_port_is_user(dp)) { 535 struct net_device *br = dsa_port_bridge_dev_get(dp); 536 struct net_device *upper_dev, *slave = dp->slave; 537 struct list_head *iter; 538 539 netdev_for_each_upper_dev_rcu(slave, upper_dev, iter) { 540 struct bridge_vlan_info br_info; 541 u16 vid; 542 543 if (!is_vlan_dev(upper_dev)) 544 continue; 545 546 vid = vlan_dev_vlan_id(upper_dev); 547 548 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the 549 * device, respectively the VID is not found, returning 550 * 0 means success, which is a failure for us here. 551 */ 552 err = br_vlan_get_info(br, vid, &br_info); 553 if (err == 0) { 554 NL_SET_ERR_MSG_MOD(extack, 555 "Must first remove VLAN uppers having VIDs also present in bridge"); 556 return false; 557 } 558 } 559 } 560 561 if (!ds->vlan_filtering_is_global) 562 return true; 563 564 /* For cases where enabling/disabling VLAN awareness is global to the 565 * switch, we need to handle the case where multiple bridges span 566 * different ports of the same switch device and one of them has a 567 * different setting than what is being requested. 568 */ 569 dsa_switch_for_each_port(other_dp, ds) { 570 struct net_device *other_br = dsa_port_bridge_dev_get(other_dp); 571 572 /* If it's the same bridge, it also has same 573 * vlan_filtering setting => no need to check 574 */ 575 if (!other_br || other_br == dsa_port_bridge_dev_get(dp)) 576 continue; 577 578 if (br_vlan_enabled(other_br) != vlan_filtering) { 579 NL_SET_ERR_MSG_MOD(extack, 580 "VLAN filtering is a global setting"); 581 return false; 582 } 583 } 584 return true; 585 } 586 587 int dsa_port_vlan_filtering(struct dsa_port *dp, bool vlan_filtering, 588 struct netlink_ext_ack *extack) 589 { 590 bool old_vlan_filtering = dsa_port_is_vlan_filtering(dp); 591 struct dsa_switch *ds = dp->ds; 592 bool apply; 593 int err; 594 595 if (!ds->ops->port_vlan_filtering) 596 return -EOPNOTSUPP; 597 598 /* We are called from dsa_slave_switchdev_blocking_event(), 599 * which is not under rcu_read_lock(), unlike 600 * dsa_slave_switchdev_event(). 601 */ 602 rcu_read_lock(); 603 apply = dsa_port_can_apply_vlan_filtering(dp, vlan_filtering, extack); 604 rcu_read_unlock(); 605 if (!apply) 606 return -EINVAL; 607 608 if (dsa_port_is_vlan_filtering(dp) == vlan_filtering) 609 return 0; 610 611 err = ds->ops->port_vlan_filtering(ds, dp->index, vlan_filtering, 612 extack); 613 if (err) 614 return err; 615 616 if (ds->vlan_filtering_is_global) { 617 struct dsa_port *other_dp; 618 619 ds->vlan_filtering = vlan_filtering; 620 621 dsa_switch_for_each_user_port(other_dp, ds) { 622 struct net_device *slave = dp->slave; 623 624 /* We might be called in the unbind path, so not 625 * all slave devices might still be registered. 626 */ 627 if (!slave) 628 continue; 629 630 err = dsa_slave_manage_vlan_filtering(slave, 631 vlan_filtering); 632 if (err) 633 goto restore; 634 } 635 } else { 636 dp->vlan_filtering = vlan_filtering; 637 638 err = dsa_slave_manage_vlan_filtering(dp->slave, 639 vlan_filtering); 640 if (err) 641 goto restore; 642 } 643 644 return 0; 645 646 restore: 647 ds->ops->port_vlan_filtering(ds, dp->index, old_vlan_filtering, NULL); 648 649 if (ds->vlan_filtering_is_global) 650 ds->vlan_filtering = old_vlan_filtering; 651 else 652 dp->vlan_filtering = old_vlan_filtering; 653 654 return err; 655 } 656 657 /* This enforces legacy behavior for switch drivers which assume they can't 658 * receive VLAN configuration when enslaved to a bridge with vlan_filtering=0 659 */ 660 bool dsa_port_skip_vlan_configuration(struct dsa_port *dp) 661 { 662 struct net_device *br = dsa_port_bridge_dev_get(dp); 663 struct dsa_switch *ds = dp->ds; 664 665 if (!br) 666 return false; 667 668 return !ds->configure_vlan_while_not_filtering && !br_vlan_enabled(br); 669 } 670 671 int dsa_port_ageing_time(struct dsa_port *dp, clock_t ageing_clock) 672 { 673 unsigned long ageing_jiffies = clock_t_to_jiffies(ageing_clock); 674 unsigned int ageing_time = jiffies_to_msecs(ageing_jiffies); 675 struct dsa_notifier_ageing_time_info info; 676 int err; 677 678 info.ageing_time = ageing_time; 679 680 err = dsa_port_notify(dp, DSA_NOTIFIER_AGEING_TIME, &info); 681 if (err) 682 return err; 683 684 dp->ageing_time = ageing_time; 685 686 return 0; 687 } 688 689 int dsa_port_pre_bridge_flags(const struct dsa_port *dp, 690 struct switchdev_brport_flags flags, 691 struct netlink_ext_ack *extack) 692 { 693 struct dsa_switch *ds = dp->ds; 694 695 if (!ds->ops->port_pre_bridge_flags) 696 return -EINVAL; 697 698 return ds->ops->port_pre_bridge_flags(ds, dp->index, flags, extack); 699 } 700 701 int dsa_port_bridge_flags(struct dsa_port *dp, 702 struct switchdev_brport_flags flags, 703 struct netlink_ext_ack *extack) 704 { 705 struct dsa_switch *ds = dp->ds; 706 int err; 707 708 if (!ds->ops->port_bridge_flags) 709 return -EOPNOTSUPP; 710 711 err = ds->ops->port_bridge_flags(ds, dp->index, flags, extack); 712 if (err) 713 return err; 714 715 if (flags.mask & BR_LEARNING) { 716 bool learning = flags.val & BR_LEARNING; 717 718 if (learning == dp->learning) 719 return 0; 720 721 if ((dp->learning && !learning) && 722 (dp->stp_state == BR_STATE_LEARNING || 723 dp->stp_state == BR_STATE_FORWARDING)) 724 dsa_port_fast_age(dp); 725 726 dp->learning = learning; 727 } 728 729 return 0; 730 } 731 732 int dsa_port_mtu_change(struct dsa_port *dp, int new_mtu, 733 bool targeted_match) 734 { 735 struct dsa_notifier_mtu_info info = { 736 .sw_index = dp->ds->index, 737 .targeted_match = targeted_match, 738 .port = dp->index, 739 .mtu = new_mtu, 740 }; 741 742 return dsa_port_notify(dp, DSA_NOTIFIER_MTU, &info); 743 } 744 745 int dsa_port_fdb_add(struct dsa_port *dp, const unsigned char *addr, 746 u16 vid) 747 { 748 struct dsa_notifier_fdb_info info = { 749 .sw_index = dp->ds->index, 750 .port = dp->index, 751 .addr = addr, 752 .vid = vid, 753 }; 754 755 return dsa_port_notify(dp, DSA_NOTIFIER_FDB_ADD, &info); 756 } 757 758 int dsa_port_fdb_del(struct dsa_port *dp, const unsigned char *addr, 759 u16 vid) 760 { 761 struct dsa_notifier_fdb_info info = { 762 .sw_index = dp->ds->index, 763 .port = dp->index, 764 .addr = addr, 765 .vid = vid, 766 767 }; 768 769 return dsa_port_notify(dp, DSA_NOTIFIER_FDB_DEL, &info); 770 } 771 772 int dsa_port_host_fdb_add(struct dsa_port *dp, const unsigned char *addr, 773 u16 vid) 774 { 775 struct dsa_notifier_fdb_info info = { 776 .sw_index = dp->ds->index, 777 .port = dp->index, 778 .addr = addr, 779 .vid = vid, 780 }; 781 struct dsa_port *cpu_dp = dp->cpu_dp; 782 int err; 783 784 err = dev_uc_add(cpu_dp->master, addr); 785 if (err) 786 return err; 787 788 return dsa_port_notify(dp, DSA_NOTIFIER_HOST_FDB_ADD, &info); 789 } 790 791 int dsa_port_host_fdb_del(struct dsa_port *dp, const unsigned char *addr, 792 u16 vid) 793 { 794 struct dsa_notifier_fdb_info info = { 795 .sw_index = dp->ds->index, 796 .port = dp->index, 797 .addr = addr, 798 .vid = vid, 799 }; 800 struct dsa_port *cpu_dp = dp->cpu_dp; 801 int err; 802 803 err = dev_uc_del(cpu_dp->master, addr); 804 if (err) 805 return err; 806 807 return dsa_port_notify(dp, DSA_NOTIFIER_HOST_FDB_DEL, &info); 808 } 809 810 int dsa_port_fdb_dump(struct dsa_port *dp, dsa_fdb_dump_cb_t *cb, void *data) 811 { 812 struct dsa_switch *ds = dp->ds; 813 int port = dp->index; 814 815 if (!ds->ops->port_fdb_dump) 816 return -EOPNOTSUPP; 817 818 return ds->ops->port_fdb_dump(ds, port, cb, data); 819 } 820 821 int dsa_port_mdb_add(const struct dsa_port *dp, 822 const struct switchdev_obj_port_mdb *mdb) 823 { 824 struct dsa_notifier_mdb_info info = { 825 .sw_index = dp->ds->index, 826 .port = dp->index, 827 .mdb = mdb, 828 }; 829 830 return dsa_port_notify(dp, DSA_NOTIFIER_MDB_ADD, &info); 831 } 832 833 int dsa_port_mdb_del(const struct dsa_port *dp, 834 const struct switchdev_obj_port_mdb *mdb) 835 { 836 struct dsa_notifier_mdb_info info = { 837 .sw_index = dp->ds->index, 838 .port = dp->index, 839 .mdb = mdb, 840 }; 841 842 return dsa_port_notify(dp, DSA_NOTIFIER_MDB_DEL, &info); 843 } 844 845 int dsa_port_host_mdb_add(const struct dsa_port *dp, 846 const struct switchdev_obj_port_mdb *mdb) 847 { 848 struct dsa_notifier_mdb_info info = { 849 .sw_index = dp->ds->index, 850 .port = dp->index, 851 .mdb = mdb, 852 }; 853 struct dsa_port *cpu_dp = dp->cpu_dp; 854 int err; 855 856 err = dev_mc_add(cpu_dp->master, mdb->addr); 857 if (err) 858 return err; 859 860 return dsa_port_notify(dp, DSA_NOTIFIER_HOST_MDB_ADD, &info); 861 } 862 863 int dsa_port_host_mdb_del(const struct dsa_port *dp, 864 const struct switchdev_obj_port_mdb *mdb) 865 { 866 struct dsa_notifier_mdb_info info = { 867 .sw_index = dp->ds->index, 868 .port = dp->index, 869 .mdb = mdb, 870 }; 871 struct dsa_port *cpu_dp = dp->cpu_dp; 872 int err; 873 874 err = dev_mc_del(cpu_dp->master, mdb->addr); 875 if (err) 876 return err; 877 878 return dsa_port_notify(dp, DSA_NOTIFIER_HOST_MDB_DEL, &info); 879 } 880 881 int dsa_port_vlan_add(struct dsa_port *dp, 882 const struct switchdev_obj_port_vlan *vlan, 883 struct netlink_ext_ack *extack) 884 { 885 struct dsa_notifier_vlan_info info = { 886 .sw_index = dp->ds->index, 887 .port = dp->index, 888 .vlan = vlan, 889 .extack = extack, 890 }; 891 892 return dsa_port_notify(dp, DSA_NOTIFIER_VLAN_ADD, &info); 893 } 894 895 int dsa_port_vlan_del(struct dsa_port *dp, 896 const struct switchdev_obj_port_vlan *vlan) 897 { 898 struct dsa_notifier_vlan_info info = { 899 .sw_index = dp->ds->index, 900 .port = dp->index, 901 .vlan = vlan, 902 }; 903 904 return dsa_port_notify(dp, DSA_NOTIFIER_VLAN_DEL, &info); 905 } 906 907 int dsa_port_mrp_add(const struct dsa_port *dp, 908 const struct switchdev_obj_mrp *mrp) 909 { 910 struct dsa_notifier_mrp_info info = { 911 .sw_index = dp->ds->index, 912 .port = dp->index, 913 .mrp = mrp, 914 }; 915 916 return dsa_port_notify(dp, DSA_NOTIFIER_MRP_ADD, &info); 917 } 918 919 int dsa_port_mrp_del(const struct dsa_port *dp, 920 const struct switchdev_obj_mrp *mrp) 921 { 922 struct dsa_notifier_mrp_info info = { 923 .sw_index = dp->ds->index, 924 .port = dp->index, 925 .mrp = mrp, 926 }; 927 928 return dsa_port_notify(dp, DSA_NOTIFIER_MRP_DEL, &info); 929 } 930 931 int dsa_port_mrp_add_ring_role(const struct dsa_port *dp, 932 const struct switchdev_obj_ring_role_mrp *mrp) 933 { 934 struct dsa_notifier_mrp_ring_role_info info = { 935 .sw_index = dp->ds->index, 936 .port = dp->index, 937 .mrp = mrp, 938 }; 939 940 return dsa_port_notify(dp, DSA_NOTIFIER_MRP_ADD_RING_ROLE, &info); 941 } 942 943 int dsa_port_mrp_del_ring_role(const struct dsa_port *dp, 944 const struct switchdev_obj_ring_role_mrp *mrp) 945 { 946 struct dsa_notifier_mrp_ring_role_info info = { 947 .sw_index = dp->ds->index, 948 .port = dp->index, 949 .mrp = mrp, 950 }; 951 952 return dsa_port_notify(dp, DSA_NOTIFIER_MRP_DEL_RING_ROLE, &info); 953 } 954 955 void dsa_port_set_tag_protocol(struct dsa_port *cpu_dp, 956 const struct dsa_device_ops *tag_ops) 957 { 958 cpu_dp->rcv = tag_ops->rcv; 959 cpu_dp->tag_ops = tag_ops; 960 } 961 962 static struct phy_device *dsa_port_get_phy_device(struct dsa_port *dp) 963 { 964 struct device_node *phy_dn; 965 struct phy_device *phydev; 966 967 phy_dn = of_parse_phandle(dp->dn, "phy-handle", 0); 968 if (!phy_dn) 969 return NULL; 970 971 phydev = of_phy_find_device(phy_dn); 972 if (!phydev) { 973 of_node_put(phy_dn); 974 return ERR_PTR(-EPROBE_DEFER); 975 } 976 977 of_node_put(phy_dn); 978 return phydev; 979 } 980 981 static void dsa_port_phylink_validate(struct phylink_config *config, 982 unsigned long *supported, 983 struct phylink_link_state *state) 984 { 985 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config); 986 struct dsa_switch *ds = dp->ds; 987 988 if (!ds->ops->phylink_validate) { 989 if (config->mac_capabilities) 990 phylink_generic_validate(config, supported, state); 991 return; 992 } 993 994 ds->ops->phylink_validate(ds, dp->index, supported, state); 995 } 996 997 static void dsa_port_phylink_mac_pcs_get_state(struct phylink_config *config, 998 struct phylink_link_state *state) 999 { 1000 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config); 1001 struct dsa_switch *ds = dp->ds; 1002 int err; 1003 1004 /* Only called for inband modes */ 1005 if (!ds->ops->phylink_mac_link_state) { 1006 state->link = 0; 1007 return; 1008 } 1009 1010 err = ds->ops->phylink_mac_link_state(ds, dp->index, state); 1011 if (err < 0) { 1012 dev_err(ds->dev, "p%d: phylink_mac_link_state() failed: %d\n", 1013 dp->index, err); 1014 state->link = 0; 1015 } 1016 } 1017 1018 static void dsa_port_phylink_mac_config(struct phylink_config *config, 1019 unsigned int mode, 1020 const struct phylink_link_state *state) 1021 { 1022 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config); 1023 struct dsa_switch *ds = dp->ds; 1024 1025 if (!ds->ops->phylink_mac_config) 1026 return; 1027 1028 ds->ops->phylink_mac_config(ds, dp->index, mode, state); 1029 } 1030 1031 static void dsa_port_phylink_mac_an_restart(struct phylink_config *config) 1032 { 1033 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config); 1034 struct dsa_switch *ds = dp->ds; 1035 1036 if (!ds->ops->phylink_mac_an_restart) 1037 return; 1038 1039 ds->ops->phylink_mac_an_restart(ds, dp->index); 1040 } 1041 1042 static void dsa_port_phylink_mac_link_down(struct phylink_config *config, 1043 unsigned int mode, 1044 phy_interface_t interface) 1045 { 1046 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config); 1047 struct phy_device *phydev = NULL; 1048 struct dsa_switch *ds = dp->ds; 1049 1050 if (dsa_port_is_user(dp)) 1051 phydev = dp->slave->phydev; 1052 1053 if (!ds->ops->phylink_mac_link_down) { 1054 if (ds->ops->adjust_link && phydev) 1055 ds->ops->adjust_link(ds, dp->index, phydev); 1056 return; 1057 } 1058 1059 ds->ops->phylink_mac_link_down(ds, dp->index, mode, interface); 1060 } 1061 1062 static void dsa_port_phylink_mac_link_up(struct phylink_config *config, 1063 struct phy_device *phydev, 1064 unsigned int mode, 1065 phy_interface_t interface, 1066 int speed, int duplex, 1067 bool tx_pause, bool rx_pause) 1068 { 1069 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config); 1070 struct dsa_switch *ds = dp->ds; 1071 1072 if (!ds->ops->phylink_mac_link_up) { 1073 if (ds->ops->adjust_link && phydev) 1074 ds->ops->adjust_link(ds, dp->index, phydev); 1075 return; 1076 } 1077 1078 ds->ops->phylink_mac_link_up(ds, dp->index, mode, interface, phydev, 1079 speed, duplex, tx_pause, rx_pause); 1080 } 1081 1082 static const struct phylink_mac_ops dsa_port_phylink_mac_ops = { 1083 .validate = dsa_port_phylink_validate, 1084 .mac_pcs_get_state = dsa_port_phylink_mac_pcs_get_state, 1085 .mac_config = dsa_port_phylink_mac_config, 1086 .mac_an_restart = dsa_port_phylink_mac_an_restart, 1087 .mac_link_down = dsa_port_phylink_mac_link_down, 1088 .mac_link_up = dsa_port_phylink_mac_link_up, 1089 }; 1090 1091 int dsa_port_phylink_create(struct dsa_port *dp) 1092 { 1093 struct dsa_switch *ds = dp->ds; 1094 phy_interface_t mode; 1095 int err; 1096 1097 err = of_get_phy_mode(dp->dn, &mode); 1098 if (err) 1099 mode = PHY_INTERFACE_MODE_NA; 1100 1101 /* Presence of phylink_mac_link_state or phylink_mac_an_restart is 1102 * an indicator of a legacy phylink driver. 1103 */ 1104 if (ds->ops->phylink_mac_link_state || 1105 ds->ops->phylink_mac_an_restart) 1106 dp->pl_config.legacy_pre_march2020 = true; 1107 1108 if (ds->ops->phylink_get_caps) 1109 ds->ops->phylink_get_caps(ds, dp->index, &dp->pl_config); 1110 1111 dp->pl = phylink_create(&dp->pl_config, of_fwnode_handle(dp->dn), 1112 mode, &dsa_port_phylink_mac_ops); 1113 if (IS_ERR(dp->pl)) { 1114 pr_err("error creating PHYLINK: %ld\n", PTR_ERR(dp->pl)); 1115 return PTR_ERR(dp->pl); 1116 } 1117 1118 return 0; 1119 } 1120 1121 static int dsa_port_setup_phy_of(struct dsa_port *dp, bool enable) 1122 { 1123 struct dsa_switch *ds = dp->ds; 1124 struct phy_device *phydev; 1125 int port = dp->index; 1126 int err = 0; 1127 1128 phydev = dsa_port_get_phy_device(dp); 1129 if (!phydev) 1130 return 0; 1131 1132 if (IS_ERR(phydev)) 1133 return PTR_ERR(phydev); 1134 1135 if (enable) { 1136 err = genphy_resume(phydev); 1137 if (err < 0) 1138 goto err_put_dev; 1139 1140 err = genphy_read_status(phydev); 1141 if (err < 0) 1142 goto err_put_dev; 1143 } else { 1144 err = genphy_suspend(phydev); 1145 if (err < 0) 1146 goto err_put_dev; 1147 } 1148 1149 if (ds->ops->adjust_link) 1150 ds->ops->adjust_link(ds, port, phydev); 1151 1152 dev_dbg(ds->dev, "enabled port's phy: %s", phydev_name(phydev)); 1153 1154 err_put_dev: 1155 put_device(&phydev->mdio.dev); 1156 return err; 1157 } 1158 1159 static int dsa_port_fixed_link_register_of(struct dsa_port *dp) 1160 { 1161 struct device_node *dn = dp->dn; 1162 struct dsa_switch *ds = dp->ds; 1163 struct phy_device *phydev; 1164 int port = dp->index; 1165 phy_interface_t mode; 1166 int err; 1167 1168 err = of_phy_register_fixed_link(dn); 1169 if (err) { 1170 dev_err(ds->dev, 1171 "failed to register the fixed PHY of port %d\n", 1172 port); 1173 return err; 1174 } 1175 1176 phydev = of_phy_find_device(dn); 1177 1178 err = of_get_phy_mode(dn, &mode); 1179 if (err) 1180 mode = PHY_INTERFACE_MODE_NA; 1181 phydev->interface = mode; 1182 1183 genphy_read_status(phydev); 1184 1185 if (ds->ops->adjust_link) 1186 ds->ops->adjust_link(ds, port, phydev); 1187 1188 put_device(&phydev->mdio.dev); 1189 1190 return 0; 1191 } 1192 1193 static int dsa_port_phylink_register(struct dsa_port *dp) 1194 { 1195 struct dsa_switch *ds = dp->ds; 1196 struct device_node *port_dn = dp->dn; 1197 int err; 1198 1199 dp->pl_config.dev = ds->dev; 1200 dp->pl_config.type = PHYLINK_DEV; 1201 dp->pl_config.pcs_poll = ds->pcs_poll; 1202 1203 err = dsa_port_phylink_create(dp); 1204 if (err) 1205 return err; 1206 1207 err = phylink_of_phy_connect(dp->pl, port_dn, 0); 1208 if (err && err != -ENODEV) { 1209 pr_err("could not attach to PHY: %d\n", err); 1210 goto err_phy_connect; 1211 } 1212 1213 return 0; 1214 1215 err_phy_connect: 1216 phylink_destroy(dp->pl); 1217 return err; 1218 } 1219 1220 int dsa_port_link_register_of(struct dsa_port *dp) 1221 { 1222 struct dsa_switch *ds = dp->ds; 1223 struct device_node *phy_np; 1224 int port = dp->index; 1225 1226 if (!ds->ops->adjust_link) { 1227 phy_np = of_parse_phandle(dp->dn, "phy-handle", 0); 1228 if (of_phy_is_fixed_link(dp->dn) || phy_np) { 1229 if (ds->ops->phylink_mac_link_down) 1230 ds->ops->phylink_mac_link_down(ds, port, 1231 MLO_AN_FIXED, PHY_INTERFACE_MODE_NA); 1232 return dsa_port_phylink_register(dp); 1233 } 1234 return 0; 1235 } 1236 1237 dev_warn(ds->dev, 1238 "Using legacy PHYLIB callbacks. Please migrate to PHYLINK!\n"); 1239 1240 if (of_phy_is_fixed_link(dp->dn)) 1241 return dsa_port_fixed_link_register_of(dp); 1242 else 1243 return dsa_port_setup_phy_of(dp, true); 1244 } 1245 1246 void dsa_port_link_unregister_of(struct dsa_port *dp) 1247 { 1248 struct dsa_switch *ds = dp->ds; 1249 1250 if (!ds->ops->adjust_link && dp->pl) { 1251 rtnl_lock(); 1252 phylink_disconnect_phy(dp->pl); 1253 rtnl_unlock(); 1254 phylink_destroy(dp->pl); 1255 dp->pl = NULL; 1256 return; 1257 } 1258 1259 if (of_phy_is_fixed_link(dp->dn)) 1260 of_phy_deregister_fixed_link(dp->dn); 1261 else 1262 dsa_port_setup_phy_of(dp, false); 1263 } 1264 1265 int dsa_port_get_phy_strings(struct dsa_port *dp, uint8_t *data) 1266 { 1267 struct phy_device *phydev; 1268 int ret = -EOPNOTSUPP; 1269 1270 if (of_phy_is_fixed_link(dp->dn)) 1271 return ret; 1272 1273 phydev = dsa_port_get_phy_device(dp); 1274 if (IS_ERR_OR_NULL(phydev)) 1275 return ret; 1276 1277 ret = phy_ethtool_get_strings(phydev, data); 1278 put_device(&phydev->mdio.dev); 1279 1280 return ret; 1281 } 1282 EXPORT_SYMBOL_GPL(dsa_port_get_phy_strings); 1283 1284 int dsa_port_get_ethtool_phy_stats(struct dsa_port *dp, uint64_t *data) 1285 { 1286 struct phy_device *phydev; 1287 int ret = -EOPNOTSUPP; 1288 1289 if (of_phy_is_fixed_link(dp->dn)) 1290 return ret; 1291 1292 phydev = dsa_port_get_phy_device(dp); 1293 if (IS_ERR_OR_NULL(phydev)) 1294 return ret; 1295 1296 ret = phy_ethtool_get_stats(phydev, NULL, data); 1297 put_device(&phydev->mdio.dev); 1298 1299 return ret; 1300 } 1301 EXPORT_SYMBOL_GPL(dsa_port_get_ethtool_phy_stats); 1302 1303 int dsa_port_get_phy_sset_count(struct dsa_port *dp) 1304 { 1305 struct phy_device *phydev; 1306 int ret = -EOPNOTSUPP; 1307 1308 if (of_phy_is_fixed_link(dp->dn)) 1309 return ret; 1310 1311 phydev = dsa_port_get_phy_device(dp); 1312 if (IS_ERR_OR_NULL(phydev)) 1313 return ret; 1314 1315 ret = phy_ethtool_get_sset_count(phydev); 1316 put_device(&phydev->mdio.dev); 1317 1318 return ret; 1319 } 1320 EXPORT_SYMBOL_GPL(dsa_port_get_phy_sset_count); 1321 1322 int dsa_port_hsr_join(struct dsa_port *dp, struct net_device *hsr) 1323 { 1324 struct dsa_notifier_hsr_info info = { 1325 .sw_index = dp->ds->index, 1326 .port = dp->index, 1327 .hsr = hsr, 1328 }; 1329 int err; 1330 1331 dp->hsr_dev = hsr; 1332 1333 err = dsa_port_notify(dp, DSA_NOTIFIER_HSR_JOIN, &info); 1334 if (err) 1335 dp->hsr_dev = NULL; 1336 1337 return err; 1338 } 1339 1340 void dsa_port_hsr_leave(struct dsa_port *dp, struct net_device *hsr) 1341 { 1342 struct dsa_notifier_hsr_info info = { 1343 .sw_index = dp->ds->index, 1344 .port = dp->index, 1345 .hsr = hsr, 1346 }; 1347 int err; 1348 1349 dp->hsr_dev = NULL; 1350 1351 err = dsa_port_notify(dp, DSA_NOTIFIER_HSR_LEAVE, &info); 1352 if (err) 1353 dev_err(dp->ds->dev, 1354 "port %d failed to notify DSA_NOTIFIER_HSR_LEAVE: %pe\n", 1355 dp->index, ERR_PTR(err)); 1356 } 1357 1358 int dsa_port_tag_8021q_vlan_add(struct dsa_port *dp, u16 vid, bool broadcast) 1359 { 1360 struct dsa_notifier_tag_8021q_vlan_info info = { 1361 .tree_index = dp->ds->dst->index, 1362 .sw_index = dp->ds->index, 1363 .port = dp->index, 1364 .vid = vid, 1365 }; 1366 1367 if (broadcast) 1368 return dsa_broadcast(DSA_NOTIFIER_TAG_8021Q_VLAN_ADD, &info); 1369 1370 return dsa_port_notify(dp, DSA_NOTIFIER_TAG_8021Q_VLAN_ADD, &info); 1371 } 1372 1373 void dsa_port_tag_8021q_vlan_del(struct dsa_port *dp, u16 vid, bool broadcast) 1374 { 1375 struct dsa_notifier_tag_8021q_vlan_info info = { 1376 .tree_index = dp->ds->dst->index, 1377 .sw_index = dp->ds->index, 1378 .port = dp->index, 1379 .vid = vid, 1380 }; 1381 int err; 1382 1383 if (broadcast) 1384 err = dsa_broadcast(DSA_NOTIFIER_TAG_8021Q_VLAN_DEL, &info); 1385 else 1386 err = dsa_port_notify(dp, DSA_NOTIFIER_TAG_8021Q_VLAN_DEL, &info); 1387 if (err) 1388 dev_err(dp->ds->dev, 1389 "port %d failed to notify tag_8021q VLAN %d deletion: %pe\n", 1390 dp->index, vid, ERR_PTR(err)); 1391 } 1392