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