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_switch *ds = dp->ds; 911 912 if (!ds->ops->port_mrp_add) 913 return -EOPNOTSUPP; 914 915 return ds->ops->port_mrp_add(ds, dp->index, mrp); 916 } 917 918 int dsa_port_mrp_del(const struct dsa_port *dp, 919 const struct switchdev_obj_mrp *mrp) 920 { 921 struct dsa_switch *ds = dp->ds; 922 923 if (!ds->ops->port_mrp_del) 924 return -EOPNOTSUPP; 925 926 return ds->ops->port_mrp_del(ds, dp->index, mrp); 927 } 928 929 int dsa_port_mrp_add_ring_role(const struct dsa_port *dp, 930 const struct switchdev_obj_ring_role_mrp *mrp) 931 { 932 struct dsa_switch *ds = dp->ds; 933 934 if (!ds->ops->port_mrp_add_ring_role) 935 return -EOPNOTSUPP; 936 937 return ds->ops->port_mrp_add_ring_role(ds, dp->index, mrp); 938 } 939 940 int dsa_port_mrp_del_ring_role(const struct dsa_port *dp, 941 const struct switchdev_obj_ring_role_mrp *mrp) 942 { 943 struct dsa_switch *ds = dp->ds; 944 945 if (!ds->ops->port_mrp_del_ring_role) 946 return -EOPNOTSUPP; 947 948 return ds->ops->port_mrp_del_ring_role(ds, dp->index, mrp); 949 } 950 951 void dsa_port_set_tag_protocol(struct dsa_port *cpu_dp, 952 const struct dsa_device_ops *tag_ops) 953 { 954 cpu_dp->rcv = tag_ops->rcv; 955 cpu_dp->tag_ops = tag_ops; 956 } 957 958 static struct phy_device *dsa_port_get_phy_device(struct dsa_port *dp) 959 { 960 struct device_node *phy_dn; 961 struct phy_device *phydev; 962 963 phy_dn = of_parse_phandle(dp->dn, "phy-handle", 0); 964 if (!phy_dn) 965 return NULL; 966 967 phydev = of_phy_find_device(phy_dn); 968 if (!phydev) { 969 of_node_put(phy_dn); 970 return ERR_PTR(-EPROBE_DEFER); 971 } 972 973 of_node_put(phy_dn); 974 return phydev; 975 } 976 977 static void dsa_port_phylink_validate(struct phylink_config *config, 978 unsigned long *supported, 979 struct phylink_link_state *state) 980 { 981 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config); 982 struct dsa_switch *ds = dp->ds; 983 984 if (!ds->ops->phylink_validate) { 985 if (config->mac_capabilities) 986 phylink_generic_validate(config, supported, state); 987 return; 988 } 989 990 ds->ops->phylink_validate(ds, dp->index, supported, state); 991 } 992 993 static void dsa_port_phylink_mac_pcs_get_state(struct phylink_config *config, 994 struct phylink_link_state *state) 995 { 996 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config); 997 struct dsa_switch *ds = dp->ds; 998 int err; 999 1000 /* Only called for inband modes */ 1001 if (!ds->ops->phylink_mac_link_state) { 1002 state->link = 0; 1003 return; 1004 } 1005 1006 err = ds->ops->phylink_mac_link_state(ds, dp->index, state); 1007 if (err < 0) { 1008 dev_err(ds->dev, "p%d: phylink_mac_link_state() failed: %d\n", 1009 dp->index, err); 1010 state->link = 0; 1011 } 1012 } 1013 1014 static void dsa_port_phylink_mac_config(struct phylink_config *config, 1015 unsigned int mode, 1016 const 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_mac_config) 1022 return; 1023 1024 ds->ops->phylink_mac_config(ds, dp->index, mode, state); 1025 } 1026 1027 static void dsa_port_phylink_mac_an_restart(struct phylink_config *config) 1028 { 1029 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config); 1030 struct dsa_switch *ds = dp->ds; 1031 1032 if (!ds->ops->phylink_mac_an_restart) 1033 return; 1034 1035 ds->ops->phylink_mac_an_restart(ds, dp->index); 1036 } 1037 1038 static void dsa_port_phylink_mac_link_down(struct phylink_config *config, 1039 unsigned int mode, 1040 phy_interface_t interface) 1041 { 1042 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config); 1043 struct phy_device *phydev = NULL; 1044 struct dsa_switch *ds = dp->ds; 1045 1046 if (dsa_port_is_user(dp)) 1047 phydev = dp->slave->phydev; 1048 1049 if (!ds->ops->phylink_mac_link_down) { 1050 if (ds->ops->adjust_link && phydev) 1051 ds->ops->adjust_link(ds, dp->index, phydev); 1052 return; 1053 } 1054 1055 ds->ops->phylink_mac_link_down(ds, dp->index, mode, interface); 1056 } 1057 1058 static void dsa_port_phylink_mac_link_up(struct phylink_config *config, 1059 struct phy_device *phydev, 1060 unsigned int mode, 1061 phy_interface_t interface, 1062 int speed, int duplex, 1063 bool tx_pause, bool rx_pause) 1064 { 1065 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config); 1066 struct dsa_switch *ds = dp->ds; 1067 1068 if (!ds->ops->phylink_mac_link_up) { 1069 if (ds->ops->adjust_link && phydev) 1070 ds->ops->adjust_link(ds, dp->index, phydev); 1071 return; 1072 } 1073 1074 ds->ops->phylink_mac_link_up(ds, dp->index, mode, interface, phydev, 1075 speed, duplex, tx_pause, rx_pause); 1076 } 1077 1078 static const struct phylink_mac_ops dsa_port_phylink_mac_ops = { 1079 .validate = dsa_port_phylink_validate, 1080 .mac_pcs_get_state = dsa_port_phylink_mac_pcs_get_state, 1081 .mac_config = dsa_port_phylink_mac_config, 1082 .mac_an_restart = dsa_port_phylink_mac_an_restart, 1083 .mac_link_down = dsa_port_phylink_mac_link_down, 1084 .mac_link_up = dsa_port_phylink_mac_link_up, 1085 }; 1086 1087 int dsa_port_phylink_create(struct dsa_port *dp) 1088 { 1089 struct dsa_switch *ds = dp->ds; 1090 phy_interface_t mode; 1091 int err; 1092 1093 err = of_get_phy_mode(dp->dn, &mode); 1094 if (err) 1095 mode = PHY_INTERFACE_MODE_NA; 1096 1097 /* Presence of phylink_mac_link_state or phylink_mac_an_restart is 1098 * an indicator of a legacy phylink driver. 1099 */ 1100 if (ds->ops->phylink_mac_link_state || 1101 ds->ops->phylink_mac_an_restart) 1102 dp->pl_config.legacy_pre_march2020 = true; 1103 1104 if (ds->ops->phylink_get_caps) 1105 ds->ops->phylink_get_caps(ds, dp->index, &dp->pl_config); 1106 1107 dp->pl = phylink_create(&dp->pl_config, of_fwnode_handle(dp->dn), 1108 mode, &dsa_port_phylink_mac_ops); 1109 if (IS_ERR(dp->pl)) { 1110 pr_err("error creating PHYLINK: %ld\n", PTR_ERR(dp->pl)); 1111 return PTR_ERR(dp->pl); 1112 } 1113 1114 return 0; 1115 } 1116 1117 static int dsa_port_setup_phy_of(struct dsa_port *dp, bool enable) 1118 { 1119 struct dsa_switch *ds = dp->ds; 1120 struct phy_device *phydev; 1121 int port = dp->index; 1122 int err = 0; 1123 1124 phydev = dsa_port_get_phy_device(dp); 1125 if (!phydev) 1126 return 0; 1127 1128 if (IS_ERR(phydev)) 1129 return PTR_ERR(phydev); 1130 1131 if (enable) { 1132 err = genphy_resume(phydev); 1133 if (err < 0) 1134 goto err_put_dev; 1135 1136 err = genphy_read_status(phydev); 1137 if (err < 0) 1138 goto err_put_dev; 1139 } else { 1140 err = genphy_suspend(phydev); 1141 if (err < 0) 1142 goto err_put_dev; 1143 } 1144 1145 if (ds->ops->adjust_link) 1146 ds->ops->adjust_link(ds, port, phydev); 1147 1148 dev_dbg(ds->dev, "enabled port's phy: %s", phydev_name(phydev)); 1149 1150 err_put_dev: 1151 put_device(&phydev->mdio.dev); 1152 return err; 1153 } 1154 1155 static int dsa_port_fixed_link_register_of(struct dsa_port *dp) 1156 { 1157 struct device_node *dn = dp->dn; 1158 struct dsa_switch *ds = dp->ds; 1159 struct phy_device *phydev; 1160 int port = dp->index; 1161 phy_interface_t mode; 1162 int err; 1163 1164 err = of_phy_register_fixed_link(dn); 1165 if (err) { 1166 dev_err(ds->dev, 1167 "failed to register the fixed PHY of port %d\n", 1168 port); 1169 return err; 1170 } 1171 1172 phydev = of_phy_find_device(dn); 1173 1174 err = of_get_phy_mode(dn, &mode); 1175 if (err) 1176 mode = PHY_INTERFACE_MODE_NA; 1177 phydev->interface = mode; 1178 1179 genphy_read_status(phydev); 1180 1181 if (ds->ops->adjust_link) 1182 ds->ops->adjust_link(ds, port, phydev); 1183 1184 put_device(&phydev->mdio.dev); 1185 1186 return 0; 1187 } 1188 1189 static int dsa_port_phylink_register(struct dsa_port *dp) 1190 { 1191 struct dsa_switch *ds = dp->ds; 1192 struct device_node *port_dn = dp->dn; 1193 int err; 1194 1195 dp->pl_config.dev = ds->dev; 1196 dp->pl_config.type = PHYLINK_DEV; 1197 dp->pl_config.pcs_poll = ds->pcs_poll; 1198 1199 err = dsa_port_phylink_create(dp); 1200 if (err) 1201 return err; 1202 1203 err = phylink_of_phy_connect(dp->pl, port_dn, 0); 1204 if (err && err != -ENODEV) { 1205 pr_err("could not attach to PHY: %d\n", err); 1206 goto err_phy_connect; 1207 } 1208 1209 return 0; 1210 1211 err_phy_connect: 1212 phylink_destroy(dp->pl); 1213 return err; 1214 } 1215 1216 int dsa_port_link_register_of(struct dsa_port *dp) 1217 { 1218 struct dsa_switch *ds = dp->ds; 1219 struct device_node *phy_np; 1220 int port = dp->index; 1221 1222 if (!ds->ops->adjust_link) { 1223 phy_np = of_parse_phandle(dp->dn, "phy-handle", 0); 1224 if (of_phy_is_fixed_link(dp->dn) || phy_np) { 1225 if (ds->ops->phylink_mac_link_down) 1226 ds->ops->phylink_mac_link_down(ds, port, 1227 MLO_AN_FIXED, PHY_INTERFACE_MODE_NA); 1228 return dsa_port_phylink_register(dp); 1229 } 1230 return 0; 1231 } 1232 1233 dev_warn(ds->dev, 1234 "Using legacy PHYLIB callbacks. Please migrate to PHYLINK!\n"); 1235 1236 if (of_phy_is_fixed_link(dp->dn)) 1237 return dsa_port_fixed_link_register_of(dp); 1238 else 1239 return dsa_port_setup_phy_of(dp, true); 1240 } 1241 1242 void dsa_port_link_unregister_of(struct dsa_port *dp) 1243 { 1244 struct dsa_switch *ds = dp->ds; 1245 1246 if (!ds->ops->adjust_link && dp->pl) { 1247 rtnl_lock(); 1248 phylink_disconnect_phy(dp->pl); 1249 rtnl_unlock(); 1250 phylink_destroy(dp->pl); 1251 dp->pl = NULL; 1252 return; 1253 } 1254 1255 if (of_phy_is_fixed_link(dp->dn)) 1256 of_phy_deregister_fixed_link(dp->dn); 1257 else 1258 dsa_port_setup_phy_of(dp, false); 1259 } 1260 1261 int dsa_port_get_phy_strings(struct dsa_port *dp, uint8_t *data) 1262 { 1263 struct phy_device *phydev; 1264 int ret = -EOPNOTSUPP; 1265 1266 if (of_phy_is_fixed_link(dp->dn)) 1267 return ret; 1268 1269 phydev = dsa_port_get_phy_device(dp); 1270 if (IS_ERR_OR_NULL(phydev)) 1271 return ret; 1272 1273 ret = phy_ethtool_get_strings(phydev, data); 1274 put_device(&phydev->mdio.dev); 1275 1276 return ret; 1277 } 1278 EXPORT_SYMBOL_GPL(dsa_port_get_phy_strings); 1279 1280 int dsa_port_get_ethtool_phy_stats(struct dsa_port *dp, uint64_t *data) 1281 { 1282 struct phy_device *phydev; 1283 int ret = -EOPNOTSUPP; 1284 1285 if (of_phy_is_fixed_link(dp->dn)) 1286 return ret; 1287 1288 phydev = dsa_port_get_phy_device(dp); 1289 if (IS_ERR_OR_NULL(phydev)) 1290 return ret; 1291 1292 ret = phy_ethtool_get_stats(phydev, NULL, data); 1293 put_device(&phydev->mdio.dev); 1294 1295 return ret; 1296 } 1297 EXPORT_SYMBOL_GPL(dsa_port_get_ethtool_phy_stats); 1298 1299 int dsa_port_get_phy_sset_count(struct dsa_port *dp) 1300 { 1301 struct phy_device *phydev; 1302 int ret = -EOPNOTSUPP; 1303 1304 if (of_phy_is_fixed_link(dp->dn)) 1305 return ret; 1306 1307 phydev = dsa_port_get_phy_device(dp); 1308 if (IS_ERR_OR_NULL(phydev)) 1309 return ret; 1310 1311 ret = phy_ethtool_get_sset_count(phydev); 1312 put_device(&phydev->mdio.dev); 1313 1314 return ret; 1315 } 1316 EXPORT_SYMBOL_GPL(dsa_port_get_phy_sset_count); 1317 1318 int dsa_port_hsr_join(struct dsa_port *dp, struct net_device *hsr) 1319 { 1320 struct dsa_switch *ds = dp->ds; 1321 int err; 1322 1323 if (!ds->ops->port_hsr_join) 1324 return -EOPNOTSUPP; 1325 1326 dp->hsr_dev = hsr; 1327 1328 err = ds->ops->port_hsr_join(ds, dp->index, hsr); 1329 if (err) 1330 dp->hsr_dev = NULL; 1331 1332 return err; 1333 } 1334 1335 void dsa_port_hsr_leave(struct dsa_port *dp, struct net_device *hsr) 1336 { 1337 struct dsa_switch *ds = dp->ds; 1338 int err; 1339 1340 dp->hsr_dev = NULL; 1341 1342 if (ds->ops->port_hsr_leave) { 1343 err = ds->ops->port_hsr_leave(ds, dp->index, hsr); 1344 if (err) 1345 dev_err(dp->ds->dev, 1346 "port %d failed to leave HSR %s: %pe\n", 1347 dp->index, hsr->name, ERR_PTR(err)); 1348 } 1349 } 1350 1351 int dsa_port_tag_8021q_vlan_add(struct dsa_port *dp, u16 vid, bool broadcast) 1352 { 1353 struct dsa_notifier_tag_8021q_vlan_info info = { 1354 .tree_index = dp->ds->dst->index, 1355 .sw_index = dp->ds->index, 1356 .port = dp->index, 1357 .vid = vid, 1358 }; 1359 1360 if (broadcast) 1361 return dsa_broadcast(DSA_NOTIFIER_TAG_8021Q_VLAN_ADD, &info); 1362 1363 return dsa_port_notify(dp, DSA_NOTIFIER_TAG_8021Q_VLAN_ADD, &info); 1364 } 1365 1366 void dsa_port_tag_8021q_vlan_del(struct dsa_port *dp, u16 vid, bool broadcast) 1367 { 1368 struct dsa_notifier_tag_8021q_vlan_info info = { 1369 .tree_index = dp->ds->dst->index, 1370 .sw_index = dp->ds->index, 1371 .port = dp->index, 1372 .vid = vid, 1373 }; 1374 int err; 1375 1376 if (broadcast) 1377 err = dsa_broadcast(DSA_NOTIFIER_TAG_8021Q_VLAN_DEL, &info); 1378 else 1379 err = dsa_port_notify(dp, DSA_NOTIFIER_TAG_8021Q_VLAN_DEL, &info); 1380 if (err) 1381 dev_err(dp->ds->dev, 1382 "port %d failed to notify tag_8021q VLAN %d deletion: %pe\n", 1383 dp->index, vid, ERR_PTR(err)); 1384 } 1385