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 int dsa_port_set_state(struct dsa_port *dp, u8 state) 34 { 35 struct dsa_switch *ds = dp->ds; 36 int port = dp->index; 37 38 if (!ds->ops->port_stp_state_set) 39 return -EOPNOTSUPP; 40 41 ds->ops->port_stp_state_set(ds, port, state); 42 43 if (ds->ops->port_fast_age) { 44 /* Fast age FDB entries or flush appropriate forwarding database 45 * for the given port, if we are moving it from Learning or 46 * Forwarding state, to Disabled or Blocking or Listening state. 47 */ 48 49 if ((dp->stp_state == BR_STATE_LEARNING || 50 dp->stp_state == BR_STATE_FORWARDING) && 51 (state == BR_STATE_DISABLED || 52 state == BR_STATE_BLOCKING || 53 state == BR_STATE_LISTENING)) 54 ds->ops->port_fast_age(ds, port); 55 } 56 57 dp->stp_state = state; 58 59 return 0; 60 } 61 62 static void dsa_port_set_state_now(struct dsa_port *dp, u8 state) 63 { 64 int err; 65 66 err = dsa_port_set_state(dp, state); 67 if (err) 68 pr_err("DSA: failed to set STP state %u (%d)\n", state, err); 69 } 70 71 int dsa_port_enable_rt(struct dsa_port *dp, struct phy_device *phy) 72 { 73 struct dsa_switch *ds = dp->ds; 74 int port = dp->index; 75 int err; 76 77 if (ds->ops->port_enable) { 78 err = ds->ops->port_enable(ds, port, phy); 79 if (err) 80 return err; 81 } 82 83 if (!dp->bridge_dev) 84 dsa_port_set_state_now(dp, BR_STATE_FORWARDING); 85 86 if (dp->pl) 87 phylink_start(dp->pl); 88 89 return 0; 90 } 91 92 int dsa_port_enable(struct dsa_port *dp, struct phy_device *phy) 93 { 94 int err; 95 96 rtnl_lock(); 97 err = dsa_port_enable_rt(dp, phy); 98 rtnl_unlock(); 99 100 return err; 101 } 102 103 void dsa_port_disable_rt(struct dsa_port *dp) 104 { 105 struct dsa_switch *ds = dp->ds; 106 int port = dp->index; 107 108 if (dp->pl) 109 phylink_stop(dp->pl); 110 111 if (!dp->bridge_dev) 112 dsa_port_set_state_now(dp, BR_STATE_DISABLED); 113 114 if (ds->ops->port_disable) 115 ds->ops->port_disable(ds, port); 116 } 117 118 void dsa_port_disable(struct dsa_port *dp) 119 { 120 rtnl_lock(); 121 dsa_port_disable_rt(dp); 122 rtnl_unlock(); 123 } 124 125 static int dsa_port_inherit_brport_flags(struct dsa_port *dp, 126 struct netlink_ext_ack *extack) 127 { 128 const unsigned long mask = BR_LEARNING | BR_FLOOD | BR_MCAST_FLOOD | 129 BR_BCAST_FLOOD; 130 struct net_device *brport_dev = dsa_port_to_bridge_port(dp); 131 int flag, err; 132 133 for_each_set_bit(flag, &mask, 32) { 134 struct switchdev_brport_flags flags = {0}; 135 136 flags.mask = BIT(flag); 137 138 if (br_port_flag_is_set(brport_dev, BIT(flag))) 139 flags.val = BIT(flag); 140 141 err = dsa_port_bridge_flags(dp, flags, extack); 142 if (err && err != -EOPNOTSUPP) 143 return err; 144 } 145 146 return 0; 147 } 148 149 static void dsa_port_clear_brport_flags(struct dsa_port *dp) 150 { 151 const unsigned long val = BR_FLOOD | BR_MCAST_FLOOD | BR_BCAST_FLOOD; 152 const unsigned long mask = BR_LEARNING | BR_FLOOD | BR_MCAST_FLOOD | 153 BR_BCAST_FLOOD; 154 int flag, err; 155 156 for_each_set_bit(flag, &mask, 32) { 157 struct switchdev_brport_flags flags = {0}; 158 159 flags.mask = BIT(flag); 160 flags.val = val & BIT(flag); 161 162 err = dsa_port_bridge_flags(dp, flags, NULL); 163 if (err && err != -EOPNOTSUPP) 164 dev_err(dp->ds->dev, 165 "failed to clear bridge port flag %lu: %pe\n", 166 flags.val, ERR_PTR(err)); 167 } 168 } 169 170 static int dsa_port_switchdev_sync(struct dsa_port *dp, 171 struct netlink_ext_ack *extack) 172 { 173 struct net_device *brport_dev = dsa_port_to_bridge_port(dp); 174 struct net_device *br = dp->bridge_dev; 175 int err; 176 177 err = dsa_port_inherit_brport_flags(dp, extack); 178 if (err) 179 return err; 180 181 err = dsa_port_set_state(dp, br_port_get_stp_state(brport_dev)); 182 if (err && err != -EOPNOTSUPP) 183 return err; 184 185 err = dsa_port_vlan_filtering(dp, br_vlan_enabled(br), extack); 186 if (err && err != -EOPNOTSUPP) 187 return err; 188 189 err = dsa_port_mrouter(dp->cpu_dp, br_multicast_router(br), extack); 190 if (err && err != -EOPNOTSUPP) 191 return err; 192 193 err = dsa_port_ageing_time(dp, br_get_ageing_time(br)); 194 if (err && err != -EOPNOTSUPP) 195 return err; 196 197 err = br_mdb_replay(br, brport_dev, 198 &dsa_slave_switchdev_blocking_notifier, 199 extack); 200 if (err && err != -EOPNOTSUPP) 201 return err; 202 203 err = br_fdb_replay(br, brport_dev, &dsa_slave_switchdev_notifier); 204 if (err && err != -EOPNOTSUPP) 205 return err; 206 207 err = br_vlan_replay(br, brport_dev, 208 &dsa_slave_switchdev_blocking_notifier, 209 extack); 210 if (err && err != -EOPNOTSUPP) 211 return err; 212 213 return 0; 214 } 215 216 static void dsa_port_switchdev_unsync(struct dsa_port *dp) 217 { 218 /* Configure the port for standalone mode (no address learning, 219 * flood everything). 220 * The bridge only emits SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS events 221 * when the user requests it through netlink or sysfs, but not 222 * automatically at port join or leave, so we need to handle resetting 223 * the brport flags ourselves. But we even prefer it that way, because 224 * otherwise, some setups might never get the notification they need, 225 * for example, when a port leaves a LAG that offloads the bridge, 226 * it becomes standalone, but as far as the bridge is concerned, no 227 * port ever left. 228 */ 229 dsa_port_clear_brport_flags(dp); 230 231 /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer, 232 * so allow it to be in BR_STATE_FORWARDING to be kept functional 233 */ 234 dsa_port_set_state_now(dp, BR_STATE_FORWARDING); 235 236 /* VLAN filtering is handled by dsa_switch_bridge_leave */ 237 238 /* Some drivers treat the notification for having a local multicast 239 * router by allowing multicast to be flooded to the CPU, so we should 240 * allow this in standalone mode too. 241 */ 242 dsa_port_mrouter(dp->cpu_dp, true, NULL); 243 244 /* Ageing time may be global to the switch chip, so don't change it 245 * here because we have no good reason (or value) to change it to. 246 */ 247 } 248 249 int dsa_port_bridge_join(struct dsa_port *dp, struct net_device *br, 250 struct netlink_ext_ack *extack) 251 { 252 struct dsa_notifier_bridge_info info = { 253 .tree_index = dp->ds->dst->index, 254 .sw_index = dp->ds->index, 255 .port = dp->index, 256 .br = br, 257 }; 258 int err; 259 260 /* Here the interface is already bridged. Reflect the current 261 * configuration so that drivers can program their chips accordingly. 262 */ 263 dp->bridge_dev = br; 264 265 err = dsa_broadcast(DSA_NOTIFIER_BRIDGE_JOIN, &info); 266 if (err) 267 goto out_rollback; 268 269 err = dsa_port_switchdev_sync(dp, extack); 270 if (err) 271 goto out_rollback_unbridge; 272 273 return 0; 274 275 out_rollback_unbridge: 276 dsa_broadcast(DSA_NOTIFIER_BRIDGE_LEAVE, &info); 277 out_rollback: 278 dp->bridge_dev = NULL; 279 return err; 280 } 281 282 void dsa_port_bridge_leave(struct dsa_port *dp, struct net_device *br) 283 { 284 struct dsa_notifier_bridge_info info = { 285 .tree_index = dp->ds->dst->index, 286 .sw_index = dp->ds->index, 287 .port = dp->index, 288 .br = br, 289 }; 290 int err; 291 292 /* Here the port is already unbridged. Reflect the current configuration 293 * so that drivers can program their chips accordingly. 294 */ 295 dp->bridge_dev = NULL; 296 297 err = dsa_broadcast(DSA_NOTIFIER_BRIDGE_LEAVE, &info); 298 if (err) 299 pr_err("DSA: failed to notify DSA_NOTIFIER_BRIDGE_LEAVE\n"); 300 301 dsa_port_switchdev_unsync(dp); 302 } 303 304 int dsa_port_lag_change(struct dsa_port *dp, 305 struct netdev_lag_lower_state_info *linfo) 306 { 307 struct dsa_notifier_lag_info info = { 308 .sw_index = dp->ds->index, 309 .port = dp->index, 310 }; 311 bool tx_enabled; 312 313 if (!dp->lag_dev) 314 return 0; 315 316 /* On statically configured aggregates (e.g. loadbalance 317 * without LACP) ports will always be tx_enabled, even if the 318 * link is down. Thus we require both link_up and tx_enabled 319 * in order to include it in the tx set. 320 */ 321 tx_enabled = linfo->link_up && linfo->tx_enabled; 322 323 if (tx_enabled == dp->lag_tx_enabled) 324 return 0; 325 326 dp->lag_tx_enabled = tx_enabled; 327 328 return dsa_port_notify(dp, DSA_NOTIFIER_LAG_CHANGE, &info); 329 } 330 331 int dsa_port_lag_join(struct dsa_port *dp, struct net_device *lag, 332 struct netdev_lag_upper_info *uinfo, 333 struct netlink_ext_ack *extack) 334 { 335 struct dsa_notifier_lag_info info = { 336 .sw_index = dp->ds->index, 337 .port = dp->index, 338 .lag = lag, 339 .info = uinfo, 340 }; 341 struct net_device *bridge_dev; 342 int err; 343 344 dsa_lag_map(dp->ds->dst, lag); 345 dp->lag_dev = lag; 346 347 err = dsa_port_notify(dp, DSA_NOTIFIER_LAG_JOIN, &info); 348 if (err) 349 goto err_lag_join; 350 351 bridge_dev = netdev_master_upper_dev_get(lag); 352 if (!bridge_dev || !netif_is_bridge_master(bridge_dev)) 353 return 0; 354 355 err = dsa_port_bridge_join(dp, bridge_dev, extack); 356 if (err) 357 goto err_bridge_join; 358 359 return 0; 360 361 err_bridge_join: 362 dsa_port_notify(dp, DSA_NOTIFIER_LAG_LEAVE, &info); 363 err_lag_join: 364 dp->lag_dev = NULL; 365 dsa_lag_unmap(dp->ds->dst, lag); 366 return err; 367 } 368 369 void dsa_port_lag_leave(struct dsa_port *dp, struct net_device *lag) 370 { 371 struct dsa_notifier_lag_info info = { 372 .sw_index = dp->ds->index, 373 .port = dp->index, 374 .lag = lag, 375 }; 376 int err; 377 378 if (!dp->lag_dev) 379 return; 380 381 /* Port might have been part of a LAG that in turn was 382 * attached to a bridge. 383 */ 384 if (dp->bridge_dev) 385 dsa_port_bridge_leave(dp, dp->bridge_dev); 386 387 dp->lag_tx_enabled = false; 388 dp->lag_dev = NULL; 389 390 err = dsa_port_notify(dp, DSA_NOTIFIER_LAG_LEAVE, &info); 391 if (err) 392 pr_err("DSA: failed to notify DSA_NOTIFIER_LAG_LEAVE: %d\n", 393 err); 394 395 dsa_lag_unmap(dp->ds->dst, lag); 396 } 397 398 /* Must be called under rcu_read_lock() */ 399 static bool dsa_port_can_apply_vlan_filtering(struct dsa_port *dp, 400 bool vlan_filtering, 401 struct netlink_ext_ack *extack) 402 { 403 struct dsa_switch *ds = dp->ds; 404 int err, i; 405 406 /* VLAN awareness was off, so the question is "can we turn it on". 407 * We may have had 8021q uppers, those need to go. Make sure we don't 408 * enter an inconsistent state: deny changing the VLAN awareness state 409 * as long as we have 8021q uppers. 410 */ 411 if (vlan_filtering && dsa_is_user_port(ds, dp->index)) { 412 struct net_device *upper_dev, *slave = dp->slave; 413 struct net_device *br = dp->bridge_dev; 414 struct list_head *iter; 415 416 netdev_for_each_upper_dev_rcu(slave, upper_dev, iter) { 417 struct bridge_vlan_info br_info; 418 u16 vid; 419 420 if (!is_vlan_dev(upper_dev)) 421 continue; 422 423 vid = vlan_dev_vlan_id(upper_dev); 424 425 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the 426 * device, respectively the VID is not found, returning 427 * 0 means success, which is a failure for us here. 428 */ 429 err = br_vlan_get_info(br, vid, &br_info); 430 if (err == 0) { 431 NL_SET_ERR_MSG_MOD(extack, 432 "Must first remove VLAN uppers having VIDs also present in bridge"); 433 return false; 434 } 435 } 436 } 437 438 if (!ds->vlan_filtering_is_global) 439 return true; 440 441 /* For cases where enabling/disabling VLAN awareness is global to the 442 * switch, we need to handle the case where multiple bridges span 443 * different ports of the same switch device and one of them has a 444 * different setting than what is being requested. 445 */ 446 for (i = 0; i < ds->num_ports; i++) { 447 struct net_device *other_bridge; 448 449 other_bridge = dsa_to_port(ds, i)->bridge_dev; 450 if (!other_bridge) 451 continue; 452 /* If it's the same bridge, it also has same 453 * vlan_filtering setting => no need to check 454 */ 455 if (other_bridge == dp->bridge_dev) 456 continue; 457 if (br_vlan_enabled(other_bridge) != vlan_filtering) { 458 NL_SET_ERR_MSG_MOD(extack, 459 "VLAN filtering is a global setting"); 460 return false; 461 } 462 } 463 return true; 464 } 465 466 int dsa_port_vlan_filtering(struct dsa_port *dp, bool vlan_filtering, 467 struct netlink_ext_ack *extack) 468 { 469 struct dsa_switch *ds = dp->ds; 470 bool apply; 471 int err; 472 473 if (!ds->ops->port_vlan_filtering) 474 return -EOPNOTSUPP; 475 476 /* We are called from dsa_slave_switchdev_blocking_event(), 477 * which is not under rcu_read_lock(), unlike 478 * dsa_slave_switchdev_event(). 479 */ 480 rcu_read_lock(); 481 apply = dsa_port_can_apply_vlan_filtering(dp, vlan_filtering, extack); 482 rcu_read_unlock(); 483 if (!apply) 484 return -EINVAL; 485 486 if (dsa_port_is_vlan_filtering(dp) == vlan_filtering) 487 return 0; 488 489 err = ds->ops->port_vlan_filtering(ds, dp->index, vlan_filtering, 490 extack); 491 if (err) 492 return err; 493 494 if (ds->vlan_filtering_is_global) 495 ds->vlan_filtering = vlan_filtering; 496 else 497 dp->vlan_filtering = vlan_filtering; 498 499 return 0; 500 } 501 502 /* This enforces legacy behavior for switch drivers which assume they can't 503 * receive VLAN configuration when enslaved to a bridge with vlan_filtering=0 504 */ 505 bool dsa_port_skip_vlan_configuration(struct dsa_port *dp) 506 { 507 struct dsa_switch *ds = dp->ds; 508 509 if (!dp->bridge_dev) 510 return false; 511 512 return (!ds->configure_vlan_while_not_filtering && 513 !br_vlan_enabled(dp->bridge_dev)); 514 } 515 516 int dsa_port_ageing_time(struct dsa_port *dp, clock_t ageing_clock) 517 { 518 unsigned long ageing_jiffies = clock_t_to_jiffies(ageing_clock); 519 unsigned int ageing_time = jiffies_to_msecs(ageing_jiffies); 520 struct dsa_notifier_ageing_time_info info; 521 int err; 522 523 info.ageing_time = ageing_time; 524 525 err = dsa_port_notify(dp, DSA_NOTIFIER_AGEING_TIME, &info); 526 if (err) 527 return err; 528 529 dp->ageing_time = ageing_time; 530 531 return 0; 532 } 533 534 int dsa_port_pre_bridge_flags(const struct dsa_port *dp, 535 struct switchdev_brport_flags flags, 536 struct netlink_ext_ack *extack) 537 { 538 struct dsa_switch *ds = dp->ds; 539 540 if (!ds->ops->port_pre_bridge_flags) 541 return -EINVAL; 542 543 return ds->ops->port_pre_bridge_flags(ds, dp->index, flags, extack); 544 } 545 546 int dsa_port_bridge_flags(const struct dsa_port *dp, 547 struct switchdev_brport_flags flags, 548 struct netlink_ext_ack *extack) 549 { 550 struct dsa_switch *ds = dp->ds; 551 552 if (!ds->ops->port_bridge_flags) 553 return -EOPNOTSUPP; 554 555 return ds->ops->port_bridge_flags(ds, dp->index, flags, extack); 556 } 557 558 int dsa_port_mrouter(struct dsa_port *dp, bool mrouter, 559 struct netlink_ext_ack *extack) 560 { 561 struct dsa_switch *ds = dp->ds; 562 563 if (!ds->ops->port_set_mrouter) 564 return -EOPNOTSUPP; 565 566 return ds->ops->port_set_mrouter(ds, dp->index, mrouter, extack); 567 } 568 569 int dsa_port_mtu_change(struct dsa_port *dp, int new_mtu, 570 bool propagate_upstream) 571 { 572 struct dsa_notifier_mtu_info info = { 573 .sw_index = dp->ds->index, 574 .propagate_upstream = propagate_upstream, 575 .port = dp->index, 576 .mtu = new_mtu, 577 }; 578 579 return dsa_port_notify(dp, DSA_NOTIFIER_MTU, &info); 580 } 581 582 int dsa_port_fdb_add(struct dsa_port *dp, const unsigned char *addr, 583 u16 vid) 584 { 585 struct dsa_notifier_fdb_info info = { 586 .sw_index = dp->ds->index, 587 .port = dp->index, 588 .addr = addr, 589 .vid = vid, 590 }; 591 592 return dsa_port_notify(dp, DSA_NOTIFIER_FDB_ADD, &info); 593 } 594 595 int dsa_port_fdb_del(struct dsa_port *dp, const unsigned char *addr, 596 u16 vid) 597 { 598 struct dsa_notifier_fdb_info info = { 599 .sw_index = dp->ds->index, 600 .port = dp->index, 601 .addr = addr, 602 .vid = vid, 603 604 }; 605 606 return dsa_port_notify(dp, DSA_NOTIFIER_FDB_DEL, &info); 607 } 608 609 int dsa_port_fdb_dump(struct dsa_port *dp, dsa_fdb_dump_cb_t *cb, void *data) 610 { 611 struct dsa_switch *ds = dp->ds; 612 int port = dp->index; 613 614 if (!ds->ops->port_fdb_dump) 615 return -EOPNOTSUPP; 616 617 return ds->ops->port_fdb_dump(ds, port, cb, data); 618 } 619 620 int dsa_port_mdb_add(const struct dsa_port *dp, 621 const struct switchdev_obj_port_mdb *mdb) 622 { 623 struct dsa_notifier_mdb_info info = { 624 .sw_index = dp->ds->index, 625 .port = dp->index, 626 .mdb = mdb, 627 }; 628 629 return dsa_port_notify(dp, DSA_NOTIFIER_MDB_ADD, &info); 630 } 631 632 int dsa_port_mdb_del(const struct dsa_port *dp, 633 const struct switchdev_obj_port_mdb *mdb) 634 { 635 struct dsa_notifier_mdb_info info = { 636 .sw_index = dp->ds->index, 637 .port = dp->index, 638 .mdb = mdb, 639 }; 640 641 return dsa_port_notify(dp, DSA_NOTIFIER_MDB_DEL, &info); 642 } 643 644 int dsa_port_vlan_add(struct dsa_port *dp, 645 const struct switchdev_obj_port_vlan *vlan, 646 struct netlink_ext_ack *extack) 647 { 648 struct dsa_notifier_vlan_info info = { 649 .sw_index = dp->ds->index, 650 .port = dp->index, 651 .vlan = vlan, 652 .extack = extack, 653 }; 654 655 return dsa_port_notify(dp, DSA_NOTIFIER_VLAN_ADD, &info); 656 } 657 658 int dsa_port_vlan_del(struct dsa_port *dp, 659 const struct switchdev_obj_port_vlan *vlan) 660 { 661 struct dsa_notifier_vlan_info info = { 662 .sw_index = dp->ds->index, 663 .port = dp->index, 664 .vlan = vlan, 665 }; 666 667 return dsa_port_notify(dp, DSA_NOTIFIER_VLAN_DEL, &info); 668 } 669 670 int dsa_port_mrp_add(const struct dsa_port *dp, 671 const struct switchdev_obj_mrp *mrp) 672 { 673 struct dsa_notifier_mrp_info info = { 674 .sw_index = dp->ds->index, 675 .port = dp->index, 676 .mrp = mrp, 677 }; 678 679 return dsa_port_notify(dp, DSA_NOTIFIER_MRP_ADD, &info); 680 } 681 682 int dsa_port_mrp_del(const struct dsa_port *dp, 683 const struct switchdev_obj_mrp *mrp) 684 { 685 struct dsa_notifier_mrp_info info = { 686 .sw_index = dp->ds->index, 687 .port = dp->index, 688 .mrp = mrp, 689 }; 690 691 return dsa_port_notify(dp, DSA_NOTIFIER_MRP_DEL, &info); 692 } 693 694 int dsa_port_mrp_add_ring_role(const struct dsa_port *dp, 695 const struct switchdev_obj_ring_role_mrp *mrp) 696 { 697 struct dsa_notifier_mrp_ring_role_info info = { 698 .sw_index = dp->ds->index, 699 .port = dp->index, 700 .mrp = mrp, 701 }; 702 703 return dsa_port_notify(dp, DSA_NOTIFIER_MRP_ADD_RING_ROLE, &info); 704 } 705 706 int dsa_port_mrp_del_ring_role(const struct dsa_port *dp, 707 const struct switchdev_obj_ring_role_mrp *mrp) 708 { 709 struct dsa_notifier_mrp_ring_role_info info = { 710 .sw_index = dp->ds->index, 711 .port = dp->index, 712 .mrp = mrp, 713 }; 714 715 return dsa_port_notify(dp, DSA_NOTIFIER_MRP_DEL_RING_ROLE, &info); 716 } 717 718 void dsa_port_set_tag_protocol(struct dsa_port *cpu_dp, 719 const struct dsa_device_ops *tag_ops) 720 { 721 cpu_dp->filter = tag_ops->filter; 722 cpu_dp->rcv = tag_ops->rcv; 723 cpu_dp->tag_ops = tag_ops; 724 } 725 726 static struct phy_device *dsa_port_get_phy_device(struct dsa_port *dp) 727 { 728 struct device_node *phy_dn; 729 struct phy_device *phydev; 730 731 phy_dn = of_parse_phandle(dp->dn, "phy-handle", 0); 732 if (!phy_dn) 733 return NULL; 734 735 phydev = of_phy_find_device(phy_dn); 736 if (!phydev) { 737 of_node_put(phy_dn); 738 return ERR_PTR(-EPROBE_DEFER); 739 } 740 741 of_node_put(phy_dn); 742 return phydev; 743 } 744 745 static void dsa_port_phylink_validate(struct phylink_config *config, 746 unsigned long *supported, 747 struct phylink_link_state *state) 748 { 749 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config); 750 struct dsa_switch *ds = dp->ds; 751 752 if (!ds->ops->phylink_validate) 753 return; 754 755 ds->ops->phylink_validate(ds, dp->index, supported, state); 756 } 757 758 static void dsa_port_phylink_mac_pcs_get_state(struct phylink_config *config, 759 struct phylink_link_state *state) 760 { 761 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config); 762 struct dsa_switch *ds = dp->ds; 763 int err; 764 765 /* Only called for inband modes */ 766 if (!ds->ops->phylink_mac_link_state) { 767 state->link = 0; 768 return; 769 } 770 771 err = ds->ops->phylink_mac_link_state(ds, dp->index, state); 772 if (err < 0) { 773 dev_err(ds->dev, "p%d: phylink_mac_link_state() failed: %d\n", 774 dp->index, err); 775 state->link = 0; 776 } 777 } 778 779 static void dsa_port_phylink_mac_config(struct phylink_config *config, 780 unsigned int mode, 781 const struct phylink_link_state *state) 782 { 783 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config); 784 struct dsa_switch *ds = dp->ds; 785 786 if (!ds->ops->phylink_mac_config) 787 return; 788 789 ds->ops->phylink_mac_config(ds, dp->index, mode, state); 790 } 791 792 static void dsa_port_phylink_mac_an_restart(struct phylink_config *config) 793 { 794 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config); 795 struct dsa_switch *ds = dp->ds; 796 797 if (!ds->ops->phylink_mac_an_restart) 798 return; 799 800 ds->ops->phylink_mac_an_restart(ds, dp->index); 801 } 802 803 static void dsa_port_phylink_mac_link_down(struct phylink_config *config, 804 unsigned int mode, 805 phy_interface_t interface) 806 { 807 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config); 808 struct phy_device *phydev = NULL; 809 struct dsa_switch *ds = dp->ds; 810 811 if (dsa_is_user_port(ds, dp->index)) 812 phydev = dp->slave->phydev; 813 814 if (!ds->ops->phylink_mac_link_down) { 815 if (ds->ops->adjust_link && phydev) 816 ds->ops->adjust_link(ds, dp->index, phydev); 817 return; 818 } 819 820 ds->ops->phylink_mac_link_down(ds, dp->index, mode, interface); 821 } 822 823 static void dsa_port_phylink_mac_link_up(struct phylink_config *config, 824 struct phy_device *phydev, 825 unsigned int mode, 826 phy_interface_t interface, 827 int speed, int duplex, 828 bool tx_pause, bool rx_pause) 829 { 830 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config); 831 struct dsa_switch *ds = dp->ds; 832 833 if (!ds->ops->phylink_mac_link_up) { 834 if (ds->ops->adjust_link && phydev) 835 ds->ops->adjust_link(ds, dp->index, phydev); 836 return; 837 } 838 839 ds->ops->phylink_mac_link_up(ds, dp->index, mode, interface, phydev, 840 speed, duplex, tx_pause, rx_pause); 841 } 842 843 const struct phylink_mac_ops dsa_port_phylink_mac_ops = { 844 .validate = dsa_port_phylink_validate, 845 .mac_pcs_get_state = dsa_port_phylink_mac_pcs_get_state, 846 .mac_config = dsa_port_phylink_mac_config, 847 .mac_an_restart = dsa_port_phylink_mac_an_restart, 848 .mac_link_down = dsa_port_phylink_mac_link_down, 849 .mac_link_up = dsa_port_phylink_mac_link_up, 850 }; 851 852 static int dsa_port_setup_phy_of(struct dsa_port *dp, bool enable) 853 { 854 struct dsa_switch *ds = dp->ds; 855 struct phy_device *phydev; 856 int port = dp->index; 857 int err = 0; 858 859 phydev = dsa_port_get_phy_device(dp); 860 if (!phydev) 861 return 0; 862 863 if (IS_ERR(phydev)) 864 return PTR_ERR(phydev); 865 866 if (enable) { 867 err = genphy_resume(phydev); 868 if (err < 0) 869 goto err_put_dev; 870 871 err = genphy_read_status(phydev); 872 if (err < 0) 873 goto err_put_dev; 874 } else { 875 err = genphy_suspend(phydev); 876 if (err < 0) 877 goto err_put_dev; 878 } 879 880 if (ds->ops->adjust_link) 881 ds->ops->adjust_link(ds, port, phydev); 882 883 dev_dbg(ds->dev, "enabled port's phy: %s", phydev_name(phydev)); 884 885 err_put_dev: 886 put_device(&phydev->mdio.dev); 887 return err; 888 } 889 890 static int dsa_port_fixed_link_register_of(struct dsa_port *dp) 891 { 892 struct device_node *dn = dp->dn; 893 struct dsa_switch *ds = dp->ds; 894 struct phy_device *phydev; 895 int port = dp->index; 896 phy_interface_t mode; 897 int err; 898 899 err = of_phy_register_fixed_link(dn); 900 if (err) { 901 dev_err(ds->dev, 902 "failed to register the fixed PHY of port %d\n", 903 port); 904 return err; 905 } 906 907 phydev = of_phy_find_device(dn); 908 909 err = of_get_phy_mode(dn, &mode); 910 if (err) 911 mode = PHY_INTERFACE_MODE_NA; 912 phydev->interface = mode; 913 914 genphy_read_status(phydev); 915 916 if (ds->ops->adjust_link) 917 ds->ops->adjust_link(ds, port, phydev); 918 919 put_device(&phydev->mdio.dev); 920 921 return 0; 922 } 923 924 static int dsa_port_phylink_register(struct dsa_port *dp) 925 { 926 struct dsa_switch *ds = dp->ds; 927 struct device_node *port_dn = dp->dn; 928 phy_interface_t mode; 929 int err; 930 931 err = of_get_phy_mode(port_dn, &mode); 932 if (err) 933 mode = PHY_INTERFACE_MODE_NA; 934 935 dp->pl_config.dev = ds->dev; 936 dp->pl_config.type = PHYLINK_DEV; 937 dp->pl_config.pcs_poll = ds->pcs_poll; 938 939 dp->pl = phylink_create(&dp->pl_config, of_fwnode_handle(port_dn), 940 mode, &dsa_port_phylink_mac_ops); 941 if (IS_ERR(dp->pl)) { 942 pr_err("error creating PHYLINK: %ld\n", PTR_ERR(dp->pl)); 943 return PTR_ERR(dp->pl); 944 } 945 946 err = phylink_of_phy_connect(dp->pl, port_dn, 0); 947 if (err && err != -ENODEV) { 948 pr_err("could not attach to PHY: %d\n", err); 949 goto err_phy_connect; 950 } 951 952 return 0; 953 954 err_phy_connect: 955 phylink_destroy(dp->pl); 956 return err; 957 } 958 959 int dsa_port_link_register_of(struct dsa_port *dp) 960 { 961 struct dsa_switch *ds = dp->ds; 962 struct device_node *phy_np; 963 int port = dp->index; 964 965 if (!ds->ops->adjust_link) { 966 phy_np = of_parse_phandle(dp->dn, "phy-handle", 0); 967 if (of_phy_is_fixed_link(dp->dn) || phy_np) { 968 if (ds->ops->phylink_mac_link_down) 969 ds->ops->phylink_mac_link_down(ds, port, 970 MLO_AN_FIXED, PHY_INTERFACE_MODE_NA); 971 return dsa_port_phylink_register(dp); 972 } 973 return 0; 974 } 975 976 dev_warn(ds->dev, 977 "Using legacy PHYLIB callbacks. Please migrate to PHYLINK!\n"); 978 979 if (of_phy_is_fixed_link(dp->dn)) 980 return dsa_port_fixed_link_register_of(dp); 981 else 982 return dsa_port_setup_phy_of(dp, true); 983 } 984 985 void dsa_port_link_unregister_of(struct dsa_port *dp) 986 { 987 struct dsa_switch *ds = dp->ds; 988 989 if (!ds->ops->adjust_link && dp->pl) { 990 rtnl_lock(); 991 phylink_disconnect_phy(dp->pl); 992 rtnl_unlock(); 993 phylink_destroy(dp->pl); 994 dp->pl = NULL; 995 return; 996 } 997 998 if (of_phy_is_fixed_link(dp->dn)) 999 of_phy_deregister_fixed_link(dp->dn); 1000 else 1001 dsa_port_setup_phy_of(dp, false); 1002 } 1003 1004 int dsa_port_get_phy_strings(struct dsa_port *dp, uint8_t *data) 1005 { 1006 struct phy_device *phydev; 1007 int ret = -EOPNOTSUPP; 1008 1009 if (of_phy_is_fixed_link(dp->dn)) 1010 return ret; 1011 1012 phydev = dsa_port_get_phy_device(dp); 1013 if (IS_ERR_OR_NULL(phydev)) 1014 return ret; 1015 1016 ret = phy_ethtool_get_strings(phydev, data); 1017 put_device(&phydev->mdio.dev); 1018 1019 return ret; 1020 } 1021 EXPORT_SYMBOL_GPL(dsa_port_get_phy_strings); 1022 1023 int dsa_port_get_ethtool_phy_stats(struct dsa_port *dp, uint64_t *data) 1024 { 1025 struct phy_device *phydev; 1026 int ret = -EOPNOTSUPP; 1027 1028 if (of_phy_is_fixed_link(dp->dn)) 1029 return ret; 1030 1031 phydev = dsa_port_get_phy_device(dp); 1032 if (IS_ERR_OR_NULL(phydev)) 1033 return ret; 1034 1035 ret = phy_ethtool_get_stats(phydev, NULL, data); 1036 put_device(&phydev->mdio.dev); 1037 1038 return ret; 1039 } 1040 EXPORT_SYMBOL_GPL(dsa_port_get_ethtool_phy_stats); 1041 1042 int dsa_port_get_phy_sset_count(struct dsa_port *dp) 1043 { 1044 struct phy_device *phydev; 1045 int ret = -EOPNOTSUPP; 1046 1047 if (of_phy_is_fixed_link(dp->dn)) 1048 return ret; 1049 1050 phydev = dsa_port_get_phy_device(dp); 1051 if (IS_ERR_OR_NULL(phydev)) 1052 return ret; 1053 1054 ret = phy_ethtool_get_sset_count(phydev); 1055 put_device(&phydev->mdio.dev); 1056 1057 return ret; 1058 } 1059 EXPORT_SYMBOL_GPL(dsa_port_get_phy_sset_count); 1060 1061 int dsa_port_hsr_join(struct dsa_port *dp, struct net_device *hsr) 1062 { 1063 struct dsa_notifier_hsr_info info = { 1064 .sw_index = dp->ds->index, 1065 .port = dp->index, 1066 .hsr = hsr, 1067 }; 1068 int err; 1069 1070 dp->hsr_dev = hsr; 1071 1072 err = dsa_port_notify(dp, DSA_NOTIFIER_HSR_JOIN, &info); 1073 if (err) 1074 dp->hsr_dev = NULL; 1075 1076 return err; 1077 } 1078 1079 void dsa_port_hsr_leave(struct dsa_port *dp, struct net_device *hsr) 1080 { 1081 struct dsa_notifier_hsr_info info = { 1082 .sw_index = dp->ds->index, 1083 .port = dp->index, 1084 .hsr = hsr, 1085 }; 1086 int err; 1087 1088 dp->hsr_dev = NULL; 1089 1090 err = dsa_port_notify(dp, DSA_NOTIFIER_HSR_LEAVE, &info); 1091 if (err) 1092 pr_err("DSA: failed to notify DSA_NOTIFIER_HSR_LEAVE\n"); 1093 } 1094