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