1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Handling of a single switch chip, part of a switch fabric 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/netdevice.h> 11 #include <linux/notifier.h> 12 #include <linux/if_vlan.h> 13 #include <net/switchdev.h> 14 15 #include "dsa_priv.h" 16 17 static unsigned int dsa_switch_fastest_ageing_time(struct dsa_switch *ds, 18 unsigned int ageing_time) 19 { 20 int i; 21 22 for (i = 0; i < ds->num_ports; ++i) { 23 struct dsa_port *dp = dsa_to_port(ds, i); 24 25 if (dp->ageing_time && dp->ageing_time < ageing_time) 26 ageing_time = dp->ageing_time; 27 } 28 29 return ageing_time; 30 } 31 32 static int dsa_switch_ageing_time(struct dsa_switch *ds, 33 struct dsa_notifier_ageing_time_info *info) 34 { 35 unsigned int ageing_time = info->ageing_time; 36 37 if (ds->ageing_time_min && ageing_time < ds->ageing_time_min) 38 return -ERANGE; 39 40 if (ds->ageing_time_max && ageing_time > ds->ageing_time_max) 41 return -ERANGE; 42 43 /* Program the fastest ageing time in case of multiple bridges */ 44 ageing_time = dsa_switch_fastest_ageing_time(ds, ageing_time); 45 46 if (ds->ops->set_ageing_time) 47 return ds->ops->set_ageing_time(ds, ageing_time); 48 49 return 0; 50 } 51 52 static bool dsa_switch_mtu_match(struct dsa_switch *ds, int port, 53 struct dsa_notifier_mtu_info *info) 54 { 55 if (ds->index == info->sw_index && port == info->port) 56 return true; 57 58 /* Do not propagate to other switches in the tree if the notifier was 59 * targeted for a single switch. 60 */ 61 if (info->targeted_match) 62 return false; 63 64 if (dsa_is_dsa_port(ds, port) || dsa_is_cpu_port(ds, port)) 65 return true; 66 67 return false; 68 } 69 70 static int dsa_switch_mtu(struct dsa_switch *ds, 71 struct dsa_notifier_mtu_info *info) 72 { 73 int port, ret; 74 75 if (!ds->ops->port_change_mtu) 76 return -EOPNOTSUPP; 77 78 for (port = 0; port < ds->num_ports; port++) { 79 if (dsa_switch_mtu_match(ds, port, info)) { 80 ret = ds->ops->port_change_mtu(ds, port, info->mtu); 81 if (ret) 82 return ret; 83 } 84 } 85 86 return 0; 87 } 88 89 static int dsa_switch_bridge_join(struct dsa_switch *ds, 90 struct dsa_notifier_bridge_info *info) 91 { 92 struct dsa_switch_tree *dst = ds->dst; 93 int err; 94 95 if (dst->index == info->tree_index && ds->index == info->sw_index) { 96 if (!ds->ops->port_bridge_join) 97 return -EOPNOTSUPP; 98 99 err = ds->ops->port_bridge_join(ds, info->port, info->br); 100 if (err) 101 return err; 102 } 103 104 if ((dst->index != info->tree_index || ds->index != info->sw_index) && 105 ds->ops->crosschip_bridge_join) { 106 err = ds->ops->crosschip_bridge_join(ds, info->tree_index, 107 info->sw_index, 108 info->port, info->br); 109 if (err) 110 return err; 111 } 112 113 return dsa_tag_8021q_bridge_join(ds, info); 114 } 115 116 static int dsa_switch_bridge_leave(struct dsa_switch *ds, 117 struct dsa_notifier_bridge_info *info) 118 { 119 struct dsa_switch_tree *dst = ds->dst; 120 struct netlink_ext_ack extack = {0}; 121 bool change_vlan_filtering = false; 122 bool vlan_filtering; 123 int err, port; 124 125 if (dst->index == info->tree_index && ds->index == info->sw_index && 126 ds->ops->port_bridge_leave) 127 ds->ops->port_bridge_leave(ds, info->port, info->br); 128 129 if ((dst->index != info->tree_index || ds->index != info->sw_index) && 130 ds->ops->crosschip_bridge_leave) 131 ds->ops->crosschip_bridge_leave(ds, info->tree_index, 132 info->sw_index, info->port, 133 info->br); 134 135 if (ds->needs_standalone_vlan_filtering && !br_vlan_enabled(info->br)) { 136 change_vlan_filtering = true; 137 vlan_filtering = true; 138 } else if (!ds->needs_standalone_vlan_filtering && 139 br_vlan_enabled(info->br)) { 140 change_vlan_filtering = true; 141 vlan_filtering = false; 142 } 143 144 /* If the bridge was vlan_filtering, the bridge core doesn't trigger an 145 * event for changing vlan_filtering setting upon slave ports leaving 146 * it. That is a good thing, because that lets us handle it and also 147 * handle the case where the switch's vlan_filtering setting is global 148 * (not per port). When that happens, the correct moment to trigger the 149 * vlan_filtering callback is only when the last port leaves the last 150 * VLAN-aware bridge. 151 */ 152 if (change_vlan_filtering && ds->vlan_filtering_is_global) { 153 for (port = 0; port < ds->num_ports; port++) { 154 struct net_device *bridge_dev; 155 156 bridge_dev = dsa_to_port(ds, port)->bridge_dev; 157 158 if (bridge_dev && br_vlan_enabled(bridge_dev)) { 159 change_vlan_filtering = false; 160 break; 161 } 162 } 163 } 164 165 if (change_vlan_filtering) { 166 err = dsa_port_vlan_filtering(dsa_to_port(ds, info->port), 167 vlan_filtering, &extack); 168 if (extack._msg) 169 dev_err(ds->dev, "port %d: %s\n", info->port, 170 extack._msg); 171 if (err && err != EOPNOTSUPP) 172 return err; 173 } 174 175 return dsa_tag_8021q_bridge_leave(ds, info); 176 } 177 178 /* Matches for all upstream-facing ports (the CPU port and all upstream-facing 179 * DSA links) that sit between the targeted port on which the notifier was 180 * emitted and its dedicated CPU port. 181 */ 182 static bool dsa_switch_host_address_match(struct dsa_switch *ds, int port, 183 int info_sw_index, int info_port) 184 { 185 struct dsa_port *targeted_dp, *cpu_dp; 186 struct dsa_switch *targeted_ds; 187 188 targeted_ds = dsa_switch_find(ds->dst->index, info_sw_index); 189 targeted_dp = dsa_to_port(targeted_ds, info_port); 190 cpu_dp = targeted_dp->cpu_dp; 191 192 if (dsa_switch_is_upstream_of(ds, targeted_ds)) 193 return port == dsa_towards_port(ds, cpu_dp->ds->index, 194 cpu_dp->index); 195 196 return false; 197 } 198 199 static struct dsa_mac_addr *dsa_mac_addr_find(struct list_head *addr_list, 200 const unsigned char *addr, 201 u16 vid) 202 { 203 struct dsa_mac_addr *a; 204 205 list_for_each_entry(a, addr_list, list) 206 if (ether_addr_equal(a->addr, addr) && a->vid == vid) 207 return a; 208 209 return NULL; 210 } 211 212 static int dsa_switch_do_mdb_add(struct dsa_switch *ds, int port, 213 const struct switchdev_obj_port_mdb *mdb) 214 { 215 struct dsa_port *dp = dsa_to_port(ds, port); 216 struct dsa_mac_addr *a; 217 int err; 218 219 /* No need to bother with refcounting for user ports */ 220 if (!(dsa_port_is_cpu(dp) || dsa_port_is_dsa(dp))) 221 return ds->ops->port_mdb_add(ds, port, mdb); 222 223 a = dsa_mac_addr_find(&dp->mdbs, mdb->addr, mdb->vid); 224 if (a) { 225 refcount_inc(&a->refcount); 226 return 0; 227 } 228 229 a = kzalloc(sizeof(*a), GFP_KERNEL); 230 if (!a) 231 return -ENOMEM; 232 233 err = ds->ops->port_mdb_add(ds, port, mdb); 234 if (err) { 235 kfree(a); 236 return err; 237 } 238 239 ether_addr_copy(a->addr, mdb->addr); 240 a->vid = mdb->vid; 241 refcount_set(&a->refcount, 1); 242 list_add_tail(&a->list, &dp->mdbs); 243 244 return 0; 245 } 246 247 static int dsa_switch_do_mdb_del(struct dsa_switch *ds, int port, 248 const struct switchdev_obj_port_mdb *mdb) 249 { 250 struct dsa_port *dp = dsa_to_port(ds, port); 251 struct dsa_mac_addr *a; 252 int err; 253 254 /* No need to bother with refcounting for user ports */ 255 if (!(dsa_port_is_cpu(dp) || dsa_port_is_dsa(dp))) 256 return ds->ops->port_mdb_del(ds, port, mdb); 257 258 a = dsa_mac_addr_find(&dp->mdbs, mdb->addr, mdb->vid); 259 if (!a) 260 return -ENOENT; 261 262 if (!refcount_dec_and_test(&a->refcount)) 263 return 0; 264 265 err = ds->ops->port_mdb_del(ds, port, mdb); 266 if (err) { 267 refcount_inc(&a->refcount); 268 return err; 269 } 270 271 list_del(&a->list); 272 kfree(a); 273 274 return 0; 275 } 276 277 static int dsa_switch_do_fdb_add(struct dsa_switch *ds, int port, 278 const unsigned char *addr, u16 vid) 279 { 280 struct dsa_port *dp = dsa_to_port(ds, port); 281 struct dsa_mac_addr *a; 282 int err; 283 284 /* No need to bother with refcounting for user ports */ 285 if (!(dsa_port_is_cpu(dp) || dsa_port_is_dsa(dp))) 286 return ds->ops->port_fdb_add(ds, port, addr, vid); 287 288 a = dsa_mac_addr_find(&dp->fdbs, addr, vid); 289 if (a) { 290 refcount_inc(&a->refcount); 291 return 0; 292 } 293 294 a = kzalloc(sizeof(*a), GFP_KERNEL); 295 if (!a) 296 return -ENOMEM; 297 298 err = ds->ops->port_fdb_add(ds, port, addr, vid); 299 if (err) { 300 kfree(a); 301 return err; 302 } 303 304 ether_addr_copy(a->addr, addr); 305 a->vid = vid; 306 refcount_set(&a->refcount, 1); 307 list_add_tail(&a->list, &dp->fdbs); 308 309 return 0; 310 } 311 312 static int dsa_switch_do_fdb_del(struct dsa_switch *ds, int port, 313 const unsigned char *addr, u16 vid) 314 { 315 struct dsa_port *dp = dsa_to_port(ds, port); 316 struct dsa_mac_addr *a; 317 int err; 318 319 /* No need to bother with refcounting for user ports */ 320 if (!(dsa_port_is_cpu(dp) || dsa_port_is_dsa(dp))) 321 return ds->ops->port_fdb_del(ds, port, addr, vid); 322 323 a = dsa_mac_addr_find(&dp->fdbs, addr, vid); 324 if (!a) 325 return -ENOENT; 326 327 if (!refcount_dec_and_test(&a->refcount)) 328 return 0; 329 330 err = ds->ops->port_fdb_del(ds, port, addr, vid); 331 if (err) { 332 refcount_inc(&a->refcount); 333 return err; 334 } 335 336 list_del(&a->list); 337 kfree(a); 338 339 return 0; 340 } 341 342 static int dsa_switch_host_fdb_add(struct dsa_switch *ds, 343 struct dsa_notifier_fdb_info *info) 344 { 345 int err = 0; 346 int port; 347 348 if (!ds->ops->port_fdb_add) 349 return -EOPNOTSUPP; 350 351 for (port = 0; port < ds->num_ports; port++) { 352 if (dsa_switch_host_address_match(ds, port, info->sw_index, 353 info->port)) { 354 err = dsa_switch_do_fdb_add(ds, port, info->addr, 355 info->vid); 356 if (err) 357 break; 358 } 359 } 360 361 return err; 362 } 363 364 static int dsa_switch_host_fdb_del(struct dsa_switch *ds, 365 struct dsa_notifier_fdb_info *info) 366 { 367 int err = 0; 368 int port; 369 370 if (!ds->ops->port_fdb_del) 371 return -EOPNOTSUPP; 372 373 for (port = 0; port < ds->num_ports; port++) { 374 if (dsa_switch_host_address_match(ds, port, info->sw_index, 375 info->port)) { 376 err = dsa_switch_do_fdb_del(ds, port, info->addr, 377 info->vid); 378 if (err) 379 break; 380 } 381 } 382 383 return err; 384 } 385 386 static int dsa_switch_fdb_add(struct dsa_switch *ds, 387 struct dsa_notifier_fdb_info *info) 388 { 389 int port = dsa_towards_port(ds, info->sw_index, info->port); 390 391 if (!ds->ops->port_fdb_add) 392 return -EOPNOTSUPP; 393 394 return dsa_switch_do_fdb_add(ds, port, info->addr, info->vid); 395 } 396 397 static int dsa_switch_fdb_del(struct dsa_switch *ds, 398 struct dsa_notifier_fdb_info *info) 399 { 400 int port = dsa_towards_port(ds, info->sw_index, info->port); 401 402 if (!ds->ops->port_fdb_del) 403 return -EOPNOTSUPP; 404 405 return dsa_switch_do_fdb_del(ds, port, info->addr, info->vid); 406 } 407 408 static int dsa_switch_hsr_join(struct dsa_switch *ds, 409 struct dsa_notifier_hsr_info *info) 410 { 411 if (ds->index == info->sw_index && ds->ops->port_hsr_join) 412 return ds->ops->port_hsr_join(ds, info->port, info->hsr); 413 414 return -EOPNOTSUPP; 415 } 416 417 static int dsa_switch_hsr_leave(struct dsa_switch *ds, 418 struct dsa_notifier_hsr_info *info) 419 { 420 if (ds->index == info->sw_index && ds->ops->port_hsr_leave) 421 return ds->ops->port_hsr_leave(ds, info->port, info->hsr); 422 423 return -EOPNOTSUPP; 424 } 425 426 static int dsa_switch_lag_change(struct dsa_switch *ds, 427 struct dsa_notifier_lag_info *info) 428 { 429 if (ds->index == info->sw_index && ds->ops->port_lag_change) 430 return ds->ops->port_lag_change(ds, info->port); 431 432 if (ds->index != info->sw_index && ds->ops->crosschip_lag_change) 433 return ds->ops->crosschip_lag_change(ds, info->sw_index, 434 info->port); 435 436 return 0; 437 } 438 439 static int dsa_switch_lag_join(struct dsa_switch *ds, 440 struct dsa_notifier_lag_info *info) 441 { 442 if (ds->index == info->sw_index && ds->ops->port_lag_join) 443 return ds->ops->port_lag_join(ds, info->port, info->lag, 444 info->info); 445 446 if (ds->index != info->sw_index && ds->ops->crosschip_lag_join) 447 return ds->ops->crosschip_lag_join(ds, info->sw_index, 448 info->port, info->lag, 449 info->info); 450 451 return -EOPNOTSUPP; 452 } 453 454 static int dsa_switch_lag_leave(struct dsa_switch *ds, 455 struct dsa_notifier_lag_info *info) 456 { 457 if (ds->index == info->sw_index && ds->ops->port_lag_leave) 458 return ds->ops->port_lag_leave(ds, info->port, info->lag); 459 460 if (ds->index != info->sw_index && ds->ops->crosschip_lag_leave) 461 return ds->ops->crosschip_lag_leave(ds, info->sw_index, 462 info->port, info->lag); 463 464 return -EOPNOTSUPP; 465 } 466 467 static int dsa_switch_mdb_add(struct dsa_switch *ds, 468 struct dsa_notifier_mdb_info *info) 469 { 470 int port = dsa_towards_port(ds, info->sw_index, info->port); 471 472 if (!ds->ops->port_mdb_add) 473 return -EOPNOTSUPP; 474 475 return dsa_switch_do_mdb_add(ds, port, info->mdb); 476 } 477 478 static int dsa_switch_mdb_del(struct dsa_switch *ds, 479 struct dsa_notifier_mdb_info *info) 480 { 481 int port = dsa_towards_port(ds, info->sw_index, info->port); 482 483 if (!ds->ops->port_mdb_del) 484 return -EOPNOTSUPP; 485 486 return dsa_switch_do_mdb_del(ds, port, info->mdb); 487 } 488 489 static int dsa_switch_host_mdb_add(struct dsa_switch *ds, 490 struct dsa_notifier_mdb_info *info) 491 { 492 int err = 0; 493 int port; 494 495 if (!ds->ops->port_mdb_add) 496 return -EOPNOTSUPP; 497 498 for (port = 0; port < ds->num_ports; port++) { 499 if (dsa_switch_host_address_match(ds, port, info->sw_index, 500 info->port)) { 501 err = dsa_switch_do_mdb_add(ds, port, info->mdb); 502 if (err) 503 break; 504 } 505 } 506 507 return err; 508 } 509 510 static int dsa_switch_host_mdb_del(struct dsa_switch *ds, 511 struct dsa_notifier_mdb_info *info) 512 { 513 int err = 0; 514 int port; 515 516 if (!ds->ops->port_mdb_del) 517 return -EOPNOTSUPP; 518 519 for (port = 0; port < ds->num_ports; port++) { 520 if (dsa_switch_host_address_match(ds, port, info->sw_index, 521 info->port)) { 522 err = dsa_switch_do_mdb_del(ds, port, info->mdb); 523 if (err) 524 break; 525 } 526 } 527 528 return err; 529 } 530 531 static bool dsa_switch_vlan_match(struct dsa_switch *ds, int port, 532 struct dsa_notifier_vlan_info *info) 533 { 534 if (ds->index == info->sw_index && port == info->port) 535 return true; 536 537 if (dsa_is_dsa_port(ds, port)) 538 return true; 539 540 return false; 541 } 542 543 static int dsa_switch_vlan_add(struct dsa_switch *ds, 544 struct dsa_notifier_vlan_info *info) 545 { 546 int port, err; 547 548 if (!ds->ops->port_vlan_add) 549 return -EOPNOTSUPP; 550 551 for (port = 0; port < ds->num_ports; port++) { 552 if (dsa_switch_vlan_match(ds, port, info)) { 553 err = ds->ops->port_vlan_add(ds, port, info->vlan, 554 info->extack); 555 if (err) 556 return err; 557 } 558 } 559 560 return 0; 561 } 562 563 static int dsa_switch_vlan_del(struct dsa_switch *ds, 564 struct dsa_notifier_vlan_info *info) 565 { 566 if (!ds->ops->port_vlan_del) 567 return -EOPNOTSUPP; 568 569 if (ds->index == info->sw_index) 570 return ds->ops->port_vlan_del(ds, info->port, info->vlan); 571 572 /* Do not deprogram the DSA links as they may be used as conduit 573 * for other VLAN members in the fabric. 574 */ 575 return 0; 576 } 577 578 static int dsa_switch_change_tag_proto(struct dsa_switch *ds, 579 struct dsa_notifier_tag_proto_info *info) 580 { 581 const struct dsa_device_ops *tag_ops = info->tag_ops; 582 int port, err; 583 584 if (!ds->ops->change_tag_protocol) 585 return -EOPNOTSUPP; 586 587 ASSERT_RTNL(); 588 589 for (port = 0; port < ds->num_ports; port++) { 590 if (!dsa_is_cpu_port(ds, port)) 591 continue; 592 593 err = ds->ops->change_tag_protocol(ds, port, tag_ops->proto); 594 if (err) 595 return err; 596 597 dsa_port_set_tag_protocol(dsa_to_port(ds, port), tag_ops); 598 } 599 600 /* Now that changing the tag protocol can no longer fail, let's update 601 * the remaining bits which are "duplicated for faster access", and the 602 * bits that depend on the tagger, such as the MTU. 603 */ 604 for (port = 0; port < ds->num_ports; port++) { 605 if (dsa_is_user_port(ds, port)) { 606 struct net_device *slave; 607 608 slave = dsa_to_port(ds, port)->slave; 609 dsa_slave_setup_tagger(slave); 610 611 /* rtnl_mutex is held in dsa_tree_change_tag_proto */ 612 dsa_slave_change_mtu(slave, slave->mtu); 613 } 614 } 615 616 return 0; 617 } 618 619 static int dsa_switch_mrp_add(struct dsa_switch *ds, 620 struct dsa_notifier_mrp_info *info) 621 { 622 if (!ds->ops->port_mrp_add) 623 return -EOPNOTSUPP; 624 625 if (ds->index == info->sw_index) 626 return ds->ops->port_mrp_add(ds, info->port, info->mrp); 627 628 return 0; 629 } 630 631 static int dsa_switch_mrp_del(struct dsa_switch *ds, 632 struct dsa_notifier_mrp_info *info) 633 { 634 if (!ds->ops->port_mrp_del) 635 return -EOPNOTSUPP; 636 637 if (ds->index == info->sw_index) 638 return ds->ops->port_mrp_del(ds, info->port, info->mrp); 639 640 return 0; 641 } 642 643 static int 644 dsa_switch_mrp_add_ring_role(struct dsa_switch *ds, 645 struct dsa_notifier_mrp_ring_role_info *info) 646 { 647 if (!ds->ops->port_mrp_add) 648 return -EOPNOTSUPP; 649 650 if (ds->index == info->sw_index) 651 return ds->ops->port_mrp_add_ring_role(ds, info->port, 652 info->mrp); 653 654 return 0; 655 } 656 657 static int 658 dsa_switch_mrp_del_ring_role(struct dsa_switch *ds, 659 struct dsa_notifier_mrp_ring_role_info *info) 660 { 661 if (!ds->ops->port_mrp_del) 662 return -EOPNOTSUPP; 663 664 if (ds->index == info->sw_index) 665 return ds->ops->port_mrp_del_ring_role(ds, info->port, 666 info->mrp); 667 668 return 0; 669 } 670 671 static int dsa_switch_event(struct notifier_block *nb, 672 unsigned long event, void *info) 673 { 674 struct dsa_switch *ds = container_of(nb, struct dsa_switch, nb); 675 int err; 676 677 switch (event) { 678 case DSA_NOTIFIER_AGEING_TIME: 679 err = dsa_switch_ageing_time(ds, info); 680 break; 681 case DSA_NOTIFIER_BRIDGE_JOIN: 682 err = dsa_switch_bridge_join(ds, info); 683 break; 684 case DSA_NOTIFIER_BRIDGE_LEAVE: 685 err = dsa_switch_bridge_leave(ds, info); 686 break; 687 case DSA_NOTIFIER_FDB_ADD: 688 err = dsa_switch_fdb_add(ds, info); 689 break; 690 case DSA_NOTIFIER_FDB_DEL: 691 err = dsa_switch_fdb_del(ds, info); 692 break; 693 case DSA_NOTIFIER_HOST_FDB_ADD: 694 err = dsa_switch_host_fdb_add(ds, info); 695 break; 696 case DSA_NOTIFIER_HOST_FDB_DEL: 697 err = dsa_switch_host_fdb_del(ds, info); 698 break; 699 case DSA_NOTIFIER_HSR_JOIN: 700 err = dsa_switch_hsr_join(ds, info); 701 break; 702 case DSA_NOTIFIER_HSR_LEAVE: 703 err = dsa_switch_hsr_leave(ds, info); 704 break; 705 case DSA_NOTIFIER_LAG_CHANGE: 706 err = dsa_switch_lag_change(ds, info); 707 break; 708 case DSA_NOTIFIER_LAG_JOIN: 709 err = dsa_switch_lag_join(ds, info); 710 break; 711 case DSA_NOTIFIER_LAG_LEAVE: 712 err = dsa_switch_lag_leave(ds, info); 713 break; 714 case DSA_NOTIFIER_MDB_ADD: 715 err = dsa_switch_mdb_add(ds, info); 716 break; 717 case DSA_NOTIFIER_MDB_DEL: 718 err = dsa_switch_mdb_del(ds, info); 719 break; 720 case DSA_NOTIFIER_HOST_MDB_ADD: 721 err = dsa_switch_host_mdb_add(ds, info); 722 break; 723 case DSA_NOTIFIER_HOST_MDB_DEL: 724 err = dsa_switch_host_mdb_del(ds, info); 725 break; 726 case DSA_NOTIFIER_VLAN_ADD: 727 err = dsa_switch_vlan_add(ds, info); 728 break; 729 case DSA_NOTIFIER_VLAN_DEL: 730 err = dsa_switch_vlan_del(ds, info); 731 break; 732 case DSA_NOTIFIER_MTU: 733 err = dsa_switch_mtu(ds, info); 734 break; 735 case DSA_NOTIFIER_TAG_PROTO: 736 err = dsa_switch_change_tag_proto(ds, info); 737 break; 738 case DSA_NOTIFIER_MRP_ADD: 739 err = dsa_switch_mrp_add(ds, info); 740 break; 741 case DSA_NOTIFIER_MRP_DEL: 742 err = dsa_switch_mrp_del(ds, info); 743 break; 744 case DSA_NOTIFIER_MRP_ADD_RING_ROLE: 745 err = dsa_switch_mrp_add_ring_role(ds, info); 746 break; 747 case DSA_NOTIFIER_MRP_DEL_RING_ROLE: 748 err = dsa_switch_mrp_del_ring_role(ds, info); 749 break; 750 case DSA_NOTIFIER_TAG_8021Q_VLAN_ADD: 751 err = dsa_switch_tag_8021q_vlan_add(ds, info); 752 break; 753 case DSA_NOTIFIER_TAG_8021Q_VLAN_DEL: 754 err = dsa_switch_tag_8021q_vlan_del(ds, info); 755 break; 756 default: 757 err = -EOPNOTSUPP; 758 break; 759 } 760 761 if (err) 762 dev_dbg(ds->dev, "breaking chain for DSA event %lu (%d)\n", 763 event, err); 764 765 return notifier_from_errno(err); 766 } 767 768 int dsa_switch_register_notifier(struct dsa_switch *ds) 769 { 770 ds->nb.notifier_call = dsa_switch_event; 771 772 return raw_notifier_chain_register(&ds->dst->nh, &ds->nb); 773 } 774 775 void dsa_switch_unregister_notifier(struct dsa_switch *ds) 776 { 777 int err; 778 779 err = raw_notifier_chain_unregister(&ds->dst->nh, &ds->nb); 780 if (err) 781 dev_err(ds->dev, "failed to unregister notifier (%d)\n", err); 782 } 783