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 void dsa_port_bridge_tx_fwd_unoffload(struct dsa_port *dp, 274 struct dsa_bridge bridge) 275 { 276 struct dsa_switch *ds = dp->ds; 277 278 /* No bridge TX forwarding offload => do nothing */ 279 if (!ds->ops->port_bridge_tx_fwd_unoffload || !bridge.num) 280 return; 281 282 /* Notify the chips only once the offload has been deactivated, so 283 * that they can update their configuration accordingly. 284 */ 285 ds->ops->port_bridge_tx_fwd_unoffload(ds, dp->index, bridge); 286 } 287 288 static bool dsa_port_bridge_tx_fwd_offload(struct dsa_port *dp, 289 struct dsa_bridge bridge) 290 { 291 struct dsa_switch *ds = dp->ds; 292 int err; 293 294 /* FDB isolation is required for TX forwarding offload */ 295 if (!ds->ops->port_bridge_tx_fwd_offload || !bridge.num) 296 return false; 297 298 /* Notify the driver */ 299 err = ds->ops->port_bridge_tx_fwd_offload(ds, dp->index, bridge); 300 301 return err ? false : true; 302 } 303 304 static int dsa_port_bridge_create(struct dsa_port *dp, 305 struct net_device *br, 306 struct netlink_ext_ack *extack) 307 { 308 struct dsa_switch *ds = dp->ds; 309 struct dsa_bridge *bridge; 310 311 bridge = dsa_tree_bridge_find(ds->dst, br); 312 if (bridge) { 313 refcount_inc(&bridge->refcount); 314 dp->bridge = bridge; 315 return 0; 316 } 317 318 bridge = kzalloc(sizeof(*bridge), GFP_KERNEL); 319 if (!bridge) 320 return -ENOMEM; 321 322 refcount_set(&bridge->refcount, 1); 323 324 bridge->dev = br; 325 326 bridge->num = dsa_bridge_num_get(br, ds->max_num_bridges); 327 if (ds->max_num_bridges && !bridge->num) { 328 NL_SET_ERR_MSG_MOD(extack, 329 "Range of offloadable bridges exceeded"); 330 kfree(bridge); 331 return -EOPNOTSUPP; 332 } 333 334 dp->bridge = bridge; 335 336 return 0; 337 } 338 339 static void dsa_port_bridge_destroy(struct dsa_port *dp, 340 const struct net_device *br) 341 { 342 struct dsa_bridge *bridge = dp->bridge; 343 344 dp->bridge = NULL; 345 346 if (!refcount_dec_and_test(&bridge->refcount)) 347 return; 348 349 if (bridge->num) 350 dsa_bridge_num_put(br, bridge->num); 351 352 kfree(bridge); 353 } 354 355 int dsa_port_bridge_join(struct dsa_port *dp, struct net_device *br, 356 struct netlink_ext_ack *extack) 357 { 358 struct dsa_notifier_bridge_info info = { 359 .tree_index = dp->ds->dst->index, 360 .sw_index = dp->ds->index, 361 .port = dp->index, 362 }; 363 struct net_device *dev = dp->slave; 364 struct net_device *brport_dev; 365 bool tx_fwd_offload; 366 int err; 367 368 /* Here the interface is already bridged. Reflect the current 369 * configuration so that drivers can program their chips accordingly. 370 */ 371 err = dsa_port_bridge_create(dp, br, extack); 372 if (err) 373 return err; 374 375 brport_dev = dsa_port_to_bridge_port(dp); 376 377 info.bridge = *dp->bridge; 378 err = dsa_broadcast(DSA_NOTIFIER_BRIDGE_JOIN, &info); 379 if (err) 380 goto out_rollback; 381 382 tx_fwd_offload = dsa_port_bridge_tx_fwd_offload(dp, info.bridge); 383 384 err = switchdev_bridge_port_offload(brport_dev, dev, dp, 385 &dsa_slave_switchdev_notifier, 386 &dsa_slave_switchdev_blocking_notifier, 387 tx_fwd_offload, extack); 388 if (err) 389 goto out_rollback_unbridge; 390 391 err = dsa_port_switchdev_sync_attrs(dp, extack); 392 if (err) 393 goto out_rollback_unoffload; 394 395 return 0; 396 397 out_rollback_unoffload: 398 switchdev_bridge_port_unoffload(brport_dev, dp, 399 &dsa_slave_switchdev_notifier, 400 &dsa_slave_switchdev_blocking_notifier); 401 out_rollback_unbridge: 402 dsa_broadcast(DSA_NOTIFIER_BRIDGE_LEAVE, &info); 403 out_rollback: 404 dsa_port_bridge_destroy(dp, br); 405 return err; 406 } 407 408 void dsa_port_pre_bridge_leave(struct dsa_port *dp, struct net_device *br) 409 { 410 struct net_device *brport_dev = dsa_port_to_bridge_port(dp); 411 412 /* Don't try to unoffload something that is not offloaded */ 413 if (!brport_dev) 414 return; 415 416 switchdev_bridge_port_unoffload(brport_dev, dp, 417 &dsa_slave_switchdev_notifier, 418 &dsa_slave_switchdev_blocking_notifier); 419 420 dsa_flush_workqueue(); 421 } 422 423 void dsa_port_bridge_leave(struct dsa_port *dp, struct net_device *br) 424 { 425 struct dsa_notifier_bridge_info info = { 426 .tree_index = dp->ds->dst->index, 427 .sw_index = dp->ds->index, 428 .port = dp->index, 429 .bridge = *dp->bridge, 430 }; 431 int err; 432 433 /* Here the port is already unbridged. Reflect the current configuration 434 * so that drivers can program their chips accordingly. 435 */ 436 dsa_port_bridge_destroy(dp, br); 437 438 dsa_port_bridge_tx_fwd_unoffload(dp, info.bridge); 439 440 err = dsa_broadcast(DSA_NOTIFIER_BRIDGE_LEAVE, &info); 441 if (err) 442 dev_err(dp->ds->dev, 443 "port %d failed to notify DSA_NOTIFIER_BRIDGE_LEAVE: %pe\n", 444 dp->index, ERR_PTR(err)); 445 446 dsa_port_switchdev_unsync_attrs(dp); 447 } 448 449 int dsa_port_lag_change(struct dsa_port *dp, 450 struct netdev_lag_lower_state_info *linfo) 451 { 452 struct dsa_notifier_lag_info info = { 453 .sw_index = dp->ds->index, 454 .port = dp->index, 455 }; 456 bool tx_enabled; 457 458 if (!dp->lag_dev) 459 return 0; 460 461 /* On statically configured aggregates (e.g. loadbalance 462 * without LACP) ports will always be tx_enabled, even if the 463 * link is down. Thus we require both link_up and tx_enabled 464 * in order to include it in the tx set. 465 */ 466 tx_enabled = linfo->link_up && linfo->tx_enabled; 467 468 if (tx_enabled == dp->lag_tx_enabled) 469 return 0; 470 471 dp->lag_tx_enabled = tx_enabled; 472 473 return dsa_port_notify(dp, DSA_NOTIFIER_LAG_CHANGE, &info); 474 } 475 476 int dsa_port_lag_join(struct dsa_port *dp, struct net_device *lag, 477 struct netdev_lag_upper_info *uinfo, 478 struct netlink_ext_ack *extack) 479 { 480 struct dsa_notifier_lag_info info = { 481 .sw_index = dp->ds->index, 482 .port = dp->index, 483 .lag = lag, 484 .info = uinfo, 485 }; 486 struct net_device *bridge_dev; 487 int err; 488 489 dsa_lag_map(dp->ds->dst, lag); 490 dp->lag_dev = lag; 491 492 err = dsa_port_notify(dp, DSA_NOTIFIER_LAG_JOIN, &info); 493 if (err) 494 goto err_lag_join; 495 496 bridge_dev = netdev_master_upper_dev_get(lag); 497 if (!bridge_dev || !netif_is_bridge_master(bridge_dev)) 498 return 0; 499 500 err = dsa_port_bridge_join(dp, bridge_dev, extack); 501 if (err) 502 goto err_bridge_join; 503 504 return 0; 505 506 err_bridge_join: 507 dsa_port_notify(dp, DSA_NOTIFIER_LAG_LEAVE, &info); 508 err_lag_join: 509 dp->lag_dev = NULL; 510 dsa_lag_unmap(dp->ds->dst, lag); 511 return err; 512 } 513 514 void dsa_port_pre_lag_leave(struct dsa_port *dp, struct net_device *lag) 515 { 516 struct net_device *br = dsa_port_bridge_dev_get(dp); 517 518 if (br) 519 dsa_port_pre_bridge_leave(dp, br); 520 } 521 522 void dsa_port_lag_leave(struct dsa_port *dp, struct net_device *lag) 523 { 524 struct net_device *br = dsa_port_bridge_dev_get(dp); 525 struct dsa_notifier_lag_info info = { 526 .sw_index = dp->ds->index, 527 .port = dp->index, 528 .lag = lag, 529 }; 530 int err; 531 532 if (!dp->lag_dev) 533 return; 534 535 /* Port might have been part of a LAG that in turn was 536 * attached to a bridge. 537 */ 538 if (br) 539 dsa_port_bridge_leave(dp, br); 540 541 dp->lag_tx_enabled = false; 542 dp->lag_dev = NULL; 543 544 err = dsa_port_notify(dp, DSA_NOTIFIER_LAG_LEAVE, &info); 545 if (err) 546 dev_err(dp->ds->dev, 547 "port %d failed to notify DSA_NOTIFIER_LAG_LEAVE: %pe\n", 548 dp->index, ERR_PTR(err)); 549 550 dsa_lag_unmap(dp->ds->dst, lag); 551 } 552 553 /* Must be called under rcu_read_lock() */ 554 static bool dsa_port_can_apply_vlan_filtering(struct dsa_port *dp, 555 bool vlan_filtering, 556 struct netlink_ext_ack *extack) 557 { 558 struct dsa_switch *ds = dp->ds; 559 struct dsa_port *other_dp; 560 int err; 561 562 /* VLAN awareness was off, so the question is "can we turn it on". 563 * We may have had 8021q uppers, those need to go. Make sure we don't 564 * enter an inconsistent state: deny changing the VLAN awareness state 565 * as long as we have 8021q uppers. 566 */ 567 if (vlan_filtering && dsa_port_is_user(dp)) { 568 struct net_device *br = dsa_port_bridge_dev_get(dp); 569 struct net_device *upper_dev, *slave = dp->slave; 570 struct list_head *iter; 571 572 netdev_for_each_upper_dev_rcu(slave, upper_dev, iter) { 573 struct bridge_vlan_info br_info; 574 u16 vid; 575 576 if (!is_vlan_dev(upper_dev)) 577 continue; 578 579 vid = vlan_dev_vlan_id(upper_dev); 580 581 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the 582 * device, respectively the VID is not found, returning 583 * 0 means success, which is a failure for us here. 584 */ 585 err = br_vlan_get_info(br, vid, &br_info); 586 if (err == 0) { 587 NL_SET_ERR_MSG_MOD(extack, 588 "Must first remove VLAN uppers having VIDs also present in bridge"); 589 return false; 590 } 591 } 592 } 593 594 if (!ds->vlan_filtering_is_global) 595 return true; 596 597 /* For cases where enabling/disabling VLAN awareness is global to the 598 * switch, we need to handle the case where multiple bridges span 599 * different ports of the same switch device and one of them has a 600 * different setting than what is being requested. 601 */ 602 dsa_switch_for_each_port(other_dp, ds) { 603 struct net_device *other_br = dsa_port_bridge_dev_get(other_dp); 604 605 /* If it's the same bridge, it also has same 606 * vlan_filtering setting => no need to check 607 */ 608 if (!other_br || other_br == dsa_port_bridge_dev_get(dp)) 609 continue; 610 611 if (br_vlan_enabled(other_br) != vlan_filtering) { 612 NL_SET_ERR_MSG_MOD(extack, 613 "VLAN filtering is a global setting"); 614 return false; 615 } 616 } 617 return true; 618 } 619 620 int dsa_port_vlan_filtering(struct dsa_port *dp, bool vlan_filtering, 621 struct netlink_ext_ack *extack) 622 { 623 bool old_vlan_filtering = dsa_port_is_vlan_filtering(dp); 624 struct dsa_switch *ds = dp->ds; 625 bool apply; 626 int err; 627 628 if (!ds->ops->port_vlan_filtering) 629 return -EOPNOTSUPP; 630 631 /* We are called from dsa_slave_switchdev_blocking_event(), 632 * which is not under rcu_read_lock(), unlike 633 * dsa_slave_switchdev_event(). 634 */ 635 rcu_read_lock(); 636 apply = dsa_port_can_apply_vlan_filtering(dp, vlan_filtering, extack); 637 rcu_read_unlock(); 638 if (!apply) 639 return -EINVAL; 640 641 if (dsa_port_is_vlan_filtering(dp) == vlan_filtering) 642 return 0; 643 644 err = ds->ops->port_vlan_filtering(ds, dp->index, vlan_filtering, 645 extack); 646 if (err) 647 return err; 648 649 if (ds->vlan_filtering_is_global) { 650 struct dsa_port *other_dp; 651 652 ds->vlan_filtering = vlan_filtering; 653 654 dsa_switch_for_each_user_port(other_dp, ds) { 655 struct net_device *slave = dp->slave; 656 657 /* We might be called in the unbind path, so not 658 * all slave devices might still be registered. 659 */ 660 if (!slave) 661 continue; 662 663 err = dsa_slave_manage_vlan_filtering(slave, 664 vlan_filtering); 665 if (err) 666 goto restore; 667 } 668 } else { 669 dp->vlan_filtering = vlan_filtering; 670 671 err = dsa_slave_manage_vlan_filtering(dp->slave, 672 vlan_filtering); 673 if (err) 674 goto restore; 675 } 676 677 return 0; 678 679 restore: 680 ds->ops->port_vlan_filtering(ds, dp->index, old_vlan_filtering, NULL); 681 682 if (ds->vlan_filtering_is_global) 683 ds->vlan_filtering = old_vlan_filtering; 684 else 685 dp->vlan_filtering = old_vlan_filtering; 686 687 return err; 688 } 689 690 /* This enforces legacy behavior for switch drivers which assume they can't 691 * receive VLAN configuration when enslaved to a bridge with vlan_filtering=0 692 */ 693 bool dsa_port_skip_vlan_configuration(struct dsa_port *dp) 694 { 695 struct net_device *br = dsa_port_bridge_dev_get(dp); 696 struct dsa_switch *ds = dp->ds; 697 698 if (!br) 699 return false; 700 701 return !ds->configure_vlan_while_not_filtering && !br_vlan_enabled(br); 702 } 703 704 int dsa_port_ageing_time(struct dsa_port *dp, clock_t ageing_clock) 705 { 706 unsigned long ageing_jiffies = clock_t_to_jiffies(ageing_clock); 707 unsigned int ageing_time = jiffies_to_msecs(ageing_jiffies); 708 struct dsa_notifier_ageing_time_info info; 709 int err; 710 711 info.ageing_time = ageing_time; 712 713 err = dsa_port_notify(dp, DSA_NOTIFIER_AGEING_TIME, &info); 714 if (err) 715 return err; 716 717 dp->ageing_time = ageing_time; 718 719 return 0; 720 } 721 722 int dsa_port_pre_bridge_flags(const struct dsa_port *dp, 723 struct switchdev_brport_flags flags, 724 struct netlink_ext_ack *extack) 725 { 726 struct dsa_switch *ds = dp->ds; 727 728 if (!ds->ops->port_pre_bridge_flags) 729 return -EINVAL; 730 731 return ds->ops->port_pre_bridge_flags(ds, dp->index, flags, extack); 732 } 733 734 int dsa_port_bridge_flags(struct dsa_port *dp, 735 struct switchdev_brport_flags flags, 736 struct netlink_ext_ack *extack) 737 { 738 struct dsa_switch *ds = dp->ds; 739 int err; 740 741 if (!ds->ops->port_bridge_flags) 742 return -EOPNOTSUPP; 743 744 err = ds->ops->port_bridge_flags(ds, dp->index, flags, extack); 745 if (err) 746 return err; 747 748 if (flags.mask & BR_LEARNING) { 749 bool learning = flags.val & BR_LEARNING; 750 751 if (learning == dp->learning) 752 return 0; 753 754 if ((dp->learning && !learning) && 755 (dp->stp_state == BR_STATE_LEARNING || 756 dp->stp_state == BR_STATE_FORWARDING)) 757 dsa_port_fast_age(dp); 758 759 dp->learning = learning; 760 } 761 762 return 0; 763 } 764 765 int dsa_port_mtu_change(struct dsa_port *dp, int new_mtu, 766 bool targeted_match) 767 { 768 struct dsa_notifier_mtu_info info = { 769 .sw_index = dp->ds->index, 770 .targeted_match = targeted_match, 771 .port = dp->index, 772 .mtu = new_mtu, 773 }; 774 775 return dsa_port_notify(dp, DSA_NOTIFIER_MTU, &info); 776 } 777 778 int dsa_port_fdb_add(struct dsa_port *dp, const unsigned char *addr, 779 u16 vid) 780 { 781 struct dsa_notifier_fdb_info info = { 782 .sw_index = dp->ds->index, 783 .port = dp->index, 784 .addr = addr, 785 .vid = vid, 786 }; 787 788 return dsa_port_notify(dp, DSA_NOTIFIER_FDB_ADD, &info); 789 } 790 791 int dsa_port_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 }; 801 802 return dsa_port_notify(dp, DSA_NOTIFIER_FDB_DEL, &info); 803 } 804 805 int dsa_port_host_fdb_add(struct dsa_port *dp, const unsigned char *addr, 806 u16 vid) 807 { 808 struct dsa_notifier_fdb_info info = { 809 .sw_index = dp->ds->index, 810 .port = dp->index, 811 .addr = addr, 812 .vid = vid, 813 }; 814 struct dsa_port *cpu_dp = dp->cpu_dp; 815 int err; 816 817 err = dev_uc_add(cpu_dp->master, addr); 818 if (err) 819 return err; 820 821 return dsa_port_notify(dp, DSA_NOTIFIER_HOST_FDB_ADD, &info); 822 } 823 824 int dsa_port_host_fdb_del(struct dsa_port *dp, const unsigned char *addr, 825 u16 vid) 826 { 827 struct dsa_notifier_fdb_info info = { 828 .sw_index = dp->ds->index, 829 .port = dp->index, 830 .addr = addr, 831 .vid = vid, 832 }; 833 struct dsa_port *cpu_dp = dp->cpu_dp; 834 int err; 835 836 err = dev_uc_del(cpu_dp->master, addr); 837 if (err) 838 return err; 839 840 return dsa_port_notify(dp, DSA_NOTIFIER_HOST_FDB_DEL, &info); 841 } 842 843 int dsa_port_fdb_dump(struct dsa_port *dp, dsa_fdb_dump_cb_t *cb, void *data) 844 { 845 struct dsa_switch *ds = dp->ds; 846 int port = dp->index; 847 848 if (!ds->ops->port_fdb_dump) 849 return -EOPNOTSUPP; 850 851 return ds->ops->port_fdb_dump(ds, port, cb, data); 852 } 853 854 int dsa_port_mdb_add(const struct dsa_port *dp, 855 const struct switchdev_obj_port_mdb *mdb) 856 { 857 struct dsa_notifier_mdb_info info = { 858 .sw_index = dp->ds->index, 859 .port = dp->index, 860 .mdb = mdb, 861 }; 862 863 return dsa_port_notify(dp, DSA_NOTIFIER_MDB_ADD, &info); 864 } 865 866 int dsa_port_mdb_del(const struct dsa_port *dp, 867 const struct switchdev_obj_port_mdb *mdb) 868 { 869 struct dsa_notifier_mdb_info info = { 870 .sw_index = dp->ds->index, 871 .port = dp->index, 872 .mdb = mdb, 873 }; 874 875 return dsa_port_notify(dp, DSA_NOTIFIER_MDB_DEL, &info); 876 } 877 878 int dsa_port_host_mdb_add(const struct dsa_port *dp, 879 const struct switchdev_obj_port_mdb *mdb) 880 { 881 struct dsa_notifier_mdb_info info = { 882 .sw_index = dp->ds->index, 883 .port = dp->index, 884 .mdb = mdb, 885 }; 886 struct dsa_port *cpu_dp = dp->cpu_dp; 887 int err; 888 889 err = dev_mc_add(cpu_dp->master, mdb->addr); 890 if (err) 891 return err; 892 893 return dsa_port_notify(dp, DSA_NOTIFIER_HOST_MDB_ADD, &info); 894 } 895 896 int dsa_port_host_mdb_del(const struct dsa_port *dp, 897 const struct switchdev_obj_port_mdb *mdb) 898 { 899 struct dsa_notifier_mdb_info info = { 900 .sw_index = dp->ds->index, 901 .port = dp->index, 902 .mdb = mdb, 903 }; 904 struct dsa_port *cpu_dp = dp->cpu_dp; 905 int err; 906 907 err = dev_mc_del(cpu_dp->master, mdb->addr); 908 if (err) 909 return err; 910 911 return dsa_port_notify(dp, DSA_NOTIFIER_HOST_MDB_DEL, &info); 912 } 913 914 int dsa_port_vlan_add(struct dsa_port *dp, 915 const struct switchdev_obj_port_vlan *vlan, 916 struct netlink_ext_ack *extack) 917 { 918 struct dsa_notifier_vlan_info info = { 919 .sw_index = dp->ds->index, 920 .port = dp->index, 921 .vlan = vlan, 922 .extack = extack, 923 }; 924 925 return dsa_port_notify(dp, DSA_NOTIFIER_VLAN_ADD, &info); 926 } 927 928 int dsa_port_vlan_del(struct dsa_port *dp, 929 const struct switchdev_obj_port_vlan *vlan) 930 { 931 struct dsa_notifier_vlan_info info = { 932 .sw_index = dp->ds->index, 933 .port = dp->index, 934 .vlan = vlan, 935 }; 936 937 return dsa_port_notify(dp, DSA_NOTIFIER_VLAN_DEL, &info); 938 } 939 940 int dsa_port_mrp_add(const struct dsa_port *dp, 941 const struct switchdev_obj_mrp *mrp) 942 { 943 struct dsa_notifier_mrp_info info = { 944 .sw_index = dp->ds->index, 945 .port = dp->index, 946 .mrp = mrp, 947 }; 948 949 return dsa_port_notify(dp, DSA_NOTIFIER_MRP_ADD, &info); 950 } 951 952 int dsa_port_mrp_del(const struct dsa_port *dp, 953 const struct switchdev_obj_mrp *mrp) 954 { 955 struct dsa_notifier_mrp_info info = { 956 .sw_index = dp->ds->index, 957 .port = dp->index, 958 .mrp = mrp, 959 }; 960 961 return dsa_port_notify(dp, DSA_NOTIFIER_MRP_DEL, &info); 962 } 963 964 int dsa_port_mrp_add_ring_role(const struct dsa_port *dp, 965 const struct switchdev_obj_ring_role_mrp *mrp) 966 { 967 struct dsa_notifier_mrp_ring_role_info info = { 968 .sw_index = dp->ds->index, 969 .port = dp->index, 970 .mrp = mrp, 971 }; 972 973 return dsa_port_notify(dp, DSA_NOTIFIER_MRP_ADD_RING_ROLE, &info); 974 } 975 976 int dsa_port_mrp_del_ring_role(const struct dsa_port *dp, 977 const struct switchdev_obj_ring_role_mrp *mrp) 978 { 979 struct dsa_notifier_mrp_ring_role_info info = { 980 .sw_index = dp->ds->index, 981 .port = dp->index, 982 .mrp = mrp, 983 }; 984 985 return dsa_port_notify(dp, DSA_NOTIFIER_MRP_DEL_RING_ROLE, &info); 986 } 987 988 void dsa_port_set_tag_protocol(struct dsa_port *cpu_dp, 989 const struct dsa_device_ops *tag_ops) 990 { 991 cpu_dp->rcv = tag_ops->rcv; 992 cpu_dp->tag_ops = tag_ops; 993 } 994 995 static struct phy_device *dsa_port_get_phy_device(struct dsa_port *dp) 996 { 997 struct device_node *phy_dn; 998 struct phy_device *phydev; 999 1000 phy_dn = of_parse_phandle(dp->dn, "phy-handle", 0); 1001 if (!phy_dn) 1002 return NULL; 1003 1004 phydev = of_phy_find_device(phy_dn); 1005 if (!phydev) { 1006 of_node_put(phy_dn); 1007 return ERR_PTR(-EPROBE_DEFER); 1008 } 1009 1010 of_node_put(phy_dn); 1011 return phydev; 1012 } 1013 1014 static void dsa_port_phylink_validate(struct phylink_config *config, 1015 unsigned long *supported, 1016 struct phylink_link_state *state) 1017 { 1018 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config); 1019 struct dsa_switch *ds = dp->ds; 1020 1021 if (!ds->ops->phylink_validate) { 1022 if (config->mac_capabilities) 1023 phylink_generic_validate(config, supported, state); 1024 return; 1025 } 1026 1027 ds->ops->phylink_validate(ds, dp->index, supported, state); 1028 } 1029 1030 static void dsa_port_phylink_mac_pcs_get_state(struct phylink_config *config, 1031 struct phylink_link_state *state) 1032 { 1033 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config); 1034 struct dsa_switch *ds = dp->ds; 1035 int err; 1036 1037 /* Only called for inband modes */ 1038 if (!ds->ops->phylink_mac_link_state) { 1039 state->link = 0; 1040 return; 1041 } 1042 1043 err = ds->ops->phylink_mac_link_state(ds, dp->index, state); 1044 if (err < 0) { 1045 dev_err(ds->dev, "p%d: phylink_mac_link_state() failed: %d\n", 1046 dp->index, err); 1047 state->link = 0; 1048 } 1049 } 1050 1051 static void dsa_port_phylink_mac_config(struct phylink_config *config, 1052 unsigned int mode, 1053 const struct phylink_link_state *state) 1054 { 1055 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config); 1056 struct dsa_switch *ds = dp->ds; 1057 1058 if (!ds->ops->phylink_mac_config) 1059 return; 1060 1061 ds->ops->phylink_mac_config(ds, dp->index, mode, state); 1062 } 1063 1064 static void dsa_port_phylink_mac_an_restart(struct phylink_config *config) 1065 { 1066 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config); 1067 struct dsa_switch *ds = dp->ds; 1068 1069 if (!ds->ops->phylink_mac_an_restart) 1070 return; 1071 1072 ds->ops->phylink_mac_an_restart(ds, dp->index); 1073 } 1074 1075 static void dsa_port_phylink_mac_link_down(struct phylink_config *config, 1076 unsigned int mode, 1077 phy_interface_t interface) 1078 { 1079 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config); 1080 struct phy_device *phydev = NULL; 1081 struct dsa_switch *ds = dp->ds; 1082 1083 if (dsa_port_is_user(dp)) 1084 phydev = dp->slave->phydev; 1085 1086 if (!ds->ops->phylink_mac_link_down) { 1087 if (ds->ops->adjust_link && phydev) 1088 ds->ops->adjust_link(ds, dp->index, phydev); 1089 return; 1090 } 1091 1092 ds->ops->phylink_mac_link_down(ds, dp->index, mode, interface); 1093 } 1094 1095 static void dsa_port_phylink_mac_link_up(struct phylink_config *config, 1096 struct phy_device *phydev, 1097 unsigned int mode, 1098 phy_interface_t interface, 1099 int speed, int duplex, 1100 bool tx_pause, bool rx_pause) 1101 { 1102 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config); 1103 struct dsa_switch *ds = dp->ds; 1104 1105 if (!ds->ops->phylink_mac_link_up) { 1106 if (ds->ops->adjust_link && phydev) 1107 ds->ops->adjust_link(ds, dp->index, phydev); 1108 return; 1109 } 1110 1111 ds->ops->phylink_mac_link_up(ds, dp->index, mode, interface, phydev, 1112 speed, duplex, tx_pause, rx_pause); 1113 } 1114 1115 static const struct phylink_mac_ops dsa_port_phylink_mac_ops = { 1116 .validate = dsa_port_phylink_validate, 1117 .mac_pcs_get_state = dsa_port_phylink_mac_pcs_get_state, 1118 .mac_config = dsa_port_phylink_mac_config, 1119 .mac_an_restart = dsa_port_phylink_mac_an_restart, 1120 .mac_link_down = dsa_port_phylink_mac_link_down, 1121 .mac_link_up = dsa_port_phylink_mac_link_up, 1122 }; 1123 1124 int dsa_port_phylink_create(struct dsa_port *dp) 1125 { 1126 struct dsa_switch *ds = dp->ds; 1127 phy_interface_t mode; 1128 int err; 1129 1130 err = of_get_phy_mode(dp->dn, &mode); 1131 if (err) 1132 mode = PHY_INTERFACE_MODE_NA; 1133 1134 if (ds->ops->phylink_get_caps) 1135 ds->ops->phylink_get_caps(ds, dp->index, &dp->pl_config); 1136 1137 dp->pl = phylink_create(&dp->pl_config, of_fwnode_handle(dp->dn), 1138 mode, &dsa_port_phylink_mac_ops); 1139 if (IS_ERR(dp->pl)) { 1140 pr_err("error creating PHYLINK: %ld\n", PTR_ERR(dp->pl)); 1141 return PTR_ERR(dp->pl); 1142 } 1143 1144 return 0; 1145 } 1146 1147 static int dsa_port_setup_phy_of(struct dsa_port *dp, bool enable) 1148 { 1149 struct dsa_switch *ds = dp->ds; 1150 struct phy_device *phydev; 1151 int port = dp->index; 1152 int err = 0; 1153 1154 phydev = dsa_port_get_phy_device(dp); 1155 if (!phydev) 1156 return 0; 1157 1158 if (IS_ERR(phydev)) 1159 return PTR_ERR(phydev); 1160 1161 if (enable) { 1162 err = genphy_resume(phydev); 1163 if (err < 0) 1164 goto err_put_dev; 1165 1166 err = genphy_read_status(phydev); 1167 if (err < 0) 1168 goto err_put_dev; 1169 } else { 1170 err = genphy_suspend(phydev); 1171 if (err < 0) 1172 goto err_put_dev; 1173 } 1174 1175 if (ds->ops->adjust_link) 1176 ds->ops->adjust_link(ds, port, phydev); 1177 1178 dev_dbg(ds->dev, "enabled port's phy: %s", phydev_name(phydev)); 1179 1180 err_put_dev: 1181 put_device(&phydev->mdio.dev); 1182 return err; 1183 } 1184 1185 static int dsa_port_fixed_link_register_of(struct dsa_port *dp) 1186 { 1187 struct device_node *dn = dp->dn; 1188 struct dsa_switch *ds = dp->ds; 1189 struct phy_device *phydev; 1190 int port = dp->index; 1191 phy_interface_t mode; 1192 int err; 1193 1194 err = of_phy_register_fixed_link(dn); 1195 if (err) { 1196 dev_err(ds->dev, 1197 "failed to register the fixed PHY of port %d\n", 1198 port); 1199 return err; 1200 } 1201 1202 phydev = of_phy_find_device(dn); 1203 1204 err = of_get_phy_mode(dn, &mode); 1205 if (err) 1206 mode = PHY_INTERFACE_MODE_NA; 1207 phydev->interface = mode; 1208 1209 genphy_read_status(phydev); 1210 1211 if (ds->ops->adjust_link) 1212 ds->ops->adjust_link(ds, port, phydev); 1213 1214 put_device(&phydev->mdio.dev); 1215 1216 return 0; 1217 } 1218 1219 static int dsa_port_phylink_register(struct dsa_port *dp) 1220 { 1221 struct dsa_switch *ds = dp->ds; 1222 struct device_node *port_dn = dp->dn; 1223 int err; 1224 1225 dp->pl_config.dev = ds->dev; 1226 dp->pl_config.type = PHYLINK_DEV; 1227 dp->pl_config.pcs_poll = ds->pcs_poll; 1228 1229 err = dsa_port_phylink_create(dp); 1230 if (err) 1231 return err; 1232 1233 err = phylink_of_phy_connect(dp->pl, port_dn, 0); 1234 if (err && err != -ENODEV) { 1235 pr_err("could not attach to PHY: %d\n", err); 1236 goto err_phy_connect; 1237 } 1238 1239 return 0; 1240 1241 err_phy_connect: 1242 phylink_destroy(dp->pl); 1243 return err; 1244 } 1245 1246 int dsa_port_link_register_of(struct dsa_port *dp) 1247 { 1248 struct dsa_switch *ds = dp->ds; 1249 struct device_node *phy_np; 1250 int port = dp->index; 1251 1252 if (!ds->ops->adjust_link) { 1253 phy_np = of_parse_phandle(dp->dn, "phy-handle", 0); 1254 if (of_phy_is_fixed_link(dp->dn) || phy_np) { 1255 if (ds->ops->phylink_mac_link_down) 1256 ds->ops->phylink_mac_link_down(ds, port, 1257 MLO_AN_FIXED, PHY_INTERFACE_MODE_NA); 1258 return dsa_port_phylink_register(dp); 1259 } 1260 return 0; 1261 } 1262 1263 dev_warn(ds->dev, 1264 "Using legacy PHYLIB callbacks. Please migrate to PHYLINK!\n"); 1265 1266 if (of_phy_is_fixed_link(dp->dn)) 1267 return dsa_port_fixed_link_register_of(dp); 1268 else 1269 return dsa_port_setup_phy_of(dp, true); 1270 } 1271 1272 void dsa_port_link_unregister_of(struct dsa_port *dp) 1273 { 1274 struct dsa_switch *ds = dp->ds; 1275 1276 if (!ds->ops->adjust_link && dp->pl) { 1277 rtnl_lock(); 1278 phylink_disconnect_phy(dp->pl); 1279 rtnl_unlock(); 1280 phylink_destroy(dp->pl); 1281 dp->pl = NULL; 1282 return; 1283 } 1284 1285 if (of_phy_is_fixed_link(dp->dn)) 1286 of_phy_deregister_fixed_link(dp->dn); 1287 else 1288 dsa_port_setup_phy_of(dp, false); 1289 } 1290 1291 int dsa_port_get_phy_strings(struct dsa_port *dp, uint8_t *data) 1292 { 1293 struct phy_device *phydev; 1294 int ret = -EOPNOTSUPP; 1295 1296 if (of_phy_is_fixed_link(dp->dn)) 1297 return ret; 1298 1299 phydev = dsa_port_get_phy_device(dp); 1300 if (IS_ERR_OR_NULL(phydev)) 1301 return ret; 1302 1303 ret = phy_ethtool_get_strings(phydev, data); 1304 put_device(&phydev->mdio.dev); 1305 1306 return ret; 1307 } 1308 EXPORT_SYMBOL_GPL(dsa_port_get_phy_strings); 1309 1310 int dsa_port_get_ethtool_phy_stats(struct dsa_port *dp, uint64_t *data) 1311 { 1312 struct phy_device *phydev; 1313 int ret = -EOPNOTSUPP; 1314 1315 if (of_phy_is_fixed_link(dp->dn)) 1316 return ret; 1317 1318 phydev = dsa_port_get_phy_device(dp); 1319 if (IS_ERR_OR_NULL(phydev)) 1320 return ret; 1321 1322 ret = phy_ethtool_get_stats(phydev, NULL, data); 1323 put_device(&phydev->mdio.dev); 1324 1325 return ret; 1326 } 1327 EXPORT_SYMBOL_GPL(dsa_port_get_ethtool_phy_stats); 1328 1329 int dsa_port_get_phy_sset_count(struct dsa_port *dp) 1330 { 1331 struct phy_device *phydev; 1332 int ret = -EOPNOTSUPP; 1333 1334 if (of_phy_is_fixed_link(dp->dn)) 1335 return ret; 1336 1337 phydev = dsa_port_get_phy_device(dp); 1338 if (IS_ERR_OR_NULL(phydev)) 1339 return ret; 1340 1341 ret = phy_ethtool_get_sset_count(phydev); 1342 put_device(&phydev->mdio.dev); 1343 1344 return ret; 1345 } 1346 EXPORT_SYMBOL_GPL(dsa_port_get_phy_sset_count); 1347 1348 int dsa_port_hsr_join(struct dsa_port *dp, struct net_device *hsr) 1349 { 1350 struct dsa_notifier_hsr_info info = { 1351 .sw_index = dp->ds->index, 1352 .port = dp->index, 1353 .hsr = hsr, 1354 }; 1355 int err; 1356 1357 dp->hsr_dev = hsr; 1358 1359 err = dsa_port_notify(dp, DSA_NOTIFIER_HSR_JOIN, &info); 1360 if (err) 1361 dp->hsr_dev = NULL; 1362 1363 return err; 1364 } 1365 1366 void dsa_port_hsr_leave(struct dsa_port *dp, struct net_device *hsr) 1367 { 1368 struct dsa_notifier_hsr_info info = { 1369 .sw_index = dp->ds->index, 1370 .port = dp->index, 1371 .hsr = hsr, 1372 }; 1373 int err; 1374 1375 dp->hsr_dev = NULL; 1376 1377 err = dsa_port_notify(dp, DSA_NOTIFIER_HSR_LEAVE, &info); 1378 if (err) 1379 dev_err(dp->ds->dev, 1380 "port %d failed to notify DSA_NOTIFIER_HSR_LEAVE: %pe\n", 1381 dp->index, ERR_PTR(err)); 1382 } 1383 1384 int dsa_port_tag_8021q_vlan_add(struct dsa_port *dp, u16 vid, bool broadcast) 1385 { 1386 struct dsa_notifier_tag_8021q_vlan_info info = { 1387 .tree_index = dp->ds->dst->index, 1388 .sw_index = dp->ds->index, 1389 .port = dp->index, 1390 .vid = vid, 1391 }; 1392 1393 if (broadcast) 1394 return dsa_broadcast(DSA_NOTIFIER_TAG_8021Q_VLAN_ADD, &info); 1395 1396 return dsa_port_notify(dp, DSA_NOTIFIER_TAG_8021Q_VLAN_ADD, &info); 1397 } 1398 1399 void dsa_port_tag_8021q_vlan_del(struct dsa_port *dp, u16 vid, bool broadcast) 1400 { 1401 struct dsa_notifier_tag_8021q_vlan_info info = { 1402 .tree_index = dp->ds->dst->index, 1403 .sw_index = dp->ds->index, 1404 .port = dp->index, 1405 .vid = vid, 1406 }; 1407 int err; 1408 1409 if (broadcast) 1410 err = dsa_broadcast(DSA_NOTIFIER_TAG_8021Q_VLAN_DEL, &info); 1411 else 1412 err = dsa_port_notify(dp, DSA_NOTIFIER_TAG_8021Q_VLAN_DEL, &info); 1413 if (err) 1414 dev_err(dp->ds->dev, 1415 "port %d failed to notify tag_8021q VLAN %d deletion: %pe\n", 1416 dp->index, vid, ERR_PTR(err)); 1417 } 1418