net/dsa/port.c

   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, dp, true,
 198                             &dsa_slave_switchdev_blocking_notifier, extack);
 199         if (err && err != -EOPNOTSUPP)
 200                 return err;
 201
 202         /* Forwarding and termination FDB entries on the port */
 203         err = br_fdb_replay(br, brport_dev, dp, true,
 204                             &dsa_slave_switchdev_notifier);
 205         if (err && err != -EOPNOTSUPP)
 206                 return err;
 207
 208         /* Termination FDB entries on the bridge itself */
 209         err = br_fdb_replay(br, br, dp, true, &dsa_slave_switchdev_notifier);
 210         if (err && err != -EOPNOTSUPP)
 211                 return err;
 212
 213         err = br_vlan_replay(br, brport_dev, dp, true,
 214                              &dsa_slave_switchdev_blocking_notifier, extack);
 215         if (err && err != -EOPNOTSUPP)
 216                 return err;
 217
 218         return 0;
 219 }
 220
 221 static int dsa_port_switchdev_unsync_objs(struct dsa_port *dp,
 222                                           struct net_device *br,
 223                                           struct netlink_ext_ack *extack)
 224 {
 225         struct net_device *brport_dev = dsa_port_to_bridge_port(dp);
 226         int err;
 227
 228         /* Delete the switchdev objects left on this port */
 229         err = br_mdb_replay(br, brport_dev, dp, false,
 230                             &dsa_slave_switchdev_blocking_notifier, extack);
 231         if (err && err != -EOPNOTSUPP)
 232                 return err;
 233
 234         /* Forwarding and termination FDB entries on the port */
 235         err = br_fdb_replay(br, brport_dev, dp, false,
 236                             &dsa_slave_switchdev_notifier);
 237         if (err && err != -EOPNOTSUPP)
 238                 return err;
 239
 240         /* Termination FDB entries on the bridge itself */
 241         err = br_fdb_replay(br, br, dp, false, &dsa_slave_switchdev_notifier);
 242         if (err && err != -EOPNOTSUPP)
 243                 return err;
 244
 245         err = br_vlan_replay(br, brport_dev, dp, false,
 246                              &dsa_slave_switchdev_blocking_notifier, extack);
 247         if (err && err != -EOPNOTSUPP)
 248                 return err;
 249
 250         return 0;
 251 }
 252
 253 static void dsa_port_switchdev_unsync_attrs(struct dsa_port *dp)
 254 {
 255         /* Configure the port for standalone mode (no address learning,
 256          * flood everything).
 257          * The bridge only emits SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS events
 258          * when the user requests it through netlink or sysfs, but not
 259          * automatically at port join or leave, so we need to handle resetting
 260          * the brport flags ourselves. But we even prefer it that way, because
 261          * otherwise, some setups might never get the notification they need,
 262          * for example, when a port leaves a LAG that offloads the bridge,
 263          * it becomes standalone, but as far as the bridge is concerned, no
 264          * port ever left.
 265          */
 266         dsa_port_clear_brport_flags(dp);
 267
 268         /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
 269          * so allow it to be in BR_STATE_FORWARDING to be kept functional
 270          */
 271         dsa_port_set_state_now(dp, BR_STATE_FORWARDING);
 272
 273         /* VLAN filtering is handled by dsa_switch_bridge_leave */
 274
 275         /* Some drivers treat the notification for having a local multicast
 276          * router by allowing multicast to be flooded to the CPU, so we should
 277          * allow this in standalone mode too.
 278          */
 279         dsa_port_mrouter(dp->cpu_dp, true, NULL);
 280
 281         /* Ageing time may be global to the switch chip, so don't change it
 282          * here because we have no good reason (or value) to change it to.
 283          */
 284 }
 285
 286 int dsa_port_bridge_join(struct dsa_port *dp, struct net_device *br,
 287                          struct netlink_ext_ack *extack)
 288 {
 289         struct dsa_notifier_bridge_info info = {
 290                 .tree_index = dp->ds->dst->index,
 291                 .sw_index = dp->ds->index,
 292                 .port = dp->index,
 293                 .br = br,
 294         };
 295         struct net_device *dev = dp->slave;
 296         struct net_device *brport_dev;
 297         int err;
 298
 299         /* Here the interface is already bridged. Reflect the current
 300          * configuration so that drivers can program their chips accordingly.
 301          */
 302         dp->bridge_dev = br;
 303
 304         brport_dev = dsa_port_to_bridge_port(dp);
 305
 306         err = dsa_broadcast(DSA_NOTIFIER_BRIDGE_JOIN, &info);
 307         if (err)
 308                 goto out_rollback;
 309
 310         err = switchdev_bridge_port_offload(brport_dev, dev, extack);
 311         if (err)
 312                 goto out_rollback_unbridge;
 313
 314         err = dsa_port_switchdev_sync(dp, extack);
 315         if (err)
 316                 goto out_rollback_unoffload;
 317
 318         return 0;
 319
 320 out_rollback_unoffload:
 321         switchdev_bridge_port_unoffload(brport_dev);
 322 out_rollback_unbridge:
 323         dsa_broadcast(DSA_NOTIFIER_BRIDGE_LEAVE, &info);
 324 out_rollback:
 325         dp->bridge_dev = NULL;
 326         return err;
 327 }
 328
 329 int dsa_port_pre_bridge_leave(struct dsa_port *dp, struct net_device *br,
 330                               struct netlink_ext_ack *extack)
 331 {
 332         struct net_device *brport_dev = dsa_port_to_bridge_port(dp);
 333
 334         switchdev_bridge_port_unoffload(brport_dev);
 335
 336         return dsa_port_switchdev_unsync_objs(dp, br, extack);
 337 }
 338
 339 void dsa_port_bridge_leave(struct dsa_port *dp, struct net_device *br)
 340 {
 341         struct dsa_notifier_bridge_info info = {
 342                 .tree_index = dp->ds->dst->index,
 343                 .sw_index = dp->ds->index,
 344                 .port = dp->index,
 345                 .br = br,
 346         };
 347         int err;
 348
 349         /* Here the port is already unbridged. Reflect the current configuration
 350          * so that drivers can program their chips accordingly.
 351          */
 352         dp->bridge_dev = NULL;
 353
 354         err = dsa_broadcast(DSA_NOTIFIER_BRIDGE_LEAVE, &info);
 355         if (err)
 356                 pr_err("DSA: failed to notify DSA_NOTIFIER_BRIDGE_LEAVE\n");
 357
 358         dsa_port_switchdev_unsync_attrs(dp);
 359 }
 360
 361 int dsa_port_lag_change(struct dsa_port *dp,
 362                         struct netdev_lag_lower_state_info *linfo)
 363 {
 364         struct dsa_notifier_lag_info info = {
 365                 .sw_index = dp->ds->index,
 366                 .port = dp->index,
 367         };
 368         bool tx_enabled;
 369
 370         if (!dp->lag_dev)
 371                 return 0;
 372
 373         /* On statically configured aggregates (e.g. loadbalance
 374          * without LACP) ports will always be tx_enabled, even if the
 375          * link is down. Thus we require both link_up and tx_enabled
 376          * in order to include it in the tx set.
 377          */
 378         tx_enabled = linfo->link_up && linfo->tx_enabled;
 379
 380         if (tx_enabled == dp->lag_tx_enabled)
 381                 return 0;
 382
 383         dp->lag_tx_enabled = tx_enabled;
 384
 385         return dsa_port_notify(dp, DSA_NOTIFIER_LAG_CHANGE, &info);
 386 }
 387
 388 int dsa_port_lag_join(struct dsa_port *dp, struct net_device *lag,
 389                       struct netdev_lag_upper_info *uinfo,
 390                       struct netlink_ext_ack *extack)
 391 {
 392         struct dsa_notifier_lag_info info = {
 393                 .sw_index = dp->ds->index,
 394                 .port = dp->index,
 395                 .lag = lag,
 396                 .info = uinfo,
 397         };
 398         struct net_device *bridge_dev;
 399         int err;
 400
 401         dsa_lag_map(dp->ds->dst, lag);
 402         dp->lag_dev = lag;
 403
 404         err = dsa_port_notify(dp, DSA_NOTIFIER_LAG_JOIN, &info);
 405         if (err)
 406                 goto err_lag_join;
 407
 408         bridge_dev = netdev_master_upper_dev_get(lag);
 409         if (!bridge_dev || !netif_is_bridge_master(bridge_dev))
 410                 return 0;
 411
 412         err = dsa_port_bridge_join(dp, bridge_dev, extack);
 413         if (err)
 414                 goto err_bridge_join;
 415
 416         return 0;
 417
 418 err_bridge_join:
 419         dsa_port_notify(dp, DSA_NOTIFIER_LAG_LEAVE, &info);
 420 err_lag_join:
 421         dp->lag_dev = NULL;
 422         dsa_lag_unmap(dp->ds->dst, lag);
 423         return err;
 424 }
 425
 426 int dsa_port_pre_lag_leave(struct dsa_port *dp, struct net_device *lag,
 427                            struct netlink_ext_ack *extack)
 428 {
 429         if (dp->bridge_dev)
 430                 return dsa_port_pre_bridge_leave(dp, dp->bridge_dev, extack);
 431
 432         return 0;
 433 }
 434
 435 void dsa_port_lag_leave(struct dsa_port *dp, struct net_device *lag)
 436 {
 437         struct dsa_notifier_lag_info info = {
 438                 .sw_index = dp->ds->index,
 439                 .port = dp->index,
 440                 .lag = lag,
 441         };
 442         int err;
 443
 444         if (!dp->lag_dev)
 445                 return;
 446
 447         /* Port might have been part of a LAG that in turn was
 448          * attached to a bridge.
 449          */
 450         if (dp->bridge_dev)
 451                 dsa_port_bridge_leave(dp, dp->bridge_dev);
 452
 453         dp->lag_tx_enabled = false;
 454         dp->lag_dev = NULL;
 455
 456         err = dsa_port_notify(dp, DSA_NOTIFIER_LAG_LEAVE, &info);
 457         if (err)
 458                 pr_err("DSA: failed to notify DSA_NOTIFIER_LAG_LEAVE: %d\n",
 459                        err);
 460
 461         dsa_lag_unmap(dp->ds->dst, lag);
 462 }
 463
 464 /* Must be called under rcu_read_lock() */
 465 static bool dsa_port_can_apply_vlan_filtering(struct dsa_port *dp,
 466                                               bool vlan_filtering,
 467                                               struct netlink_ext_ack *extack)
 468 {
 469         struct dsa_switch *ds = dp->ds;
 470         int err, i;
 471
 472         /* VLAN awareness was off, so the question is "can we turn it on".
 473          * We may have had 8021q uppers, those need to go. Make sure we don't
 474          * enter an inconsistent state: deny changing the VLAN awareness state
 475          * as long as we have 8021q uppers.
 476          */
 477         if (vlan_filtering && dsa_is_user_port(ds, dp->index)) {
 478                 struct net_device *upper_dev, *slave = dp->slave;
 479                 struct net_device *br = dp->bridge_dev;
 480                 struct list_head *iter;
 481
 482                 netdev_for_each_upper_dev_rcu(slave, upper_dev, iter) {
 483                         struct bridge_vlan_info br_info;
 484                         u16 vid;
 485
 486                         if (!is_vlan_dev(upper_dev))
 487                                 continue;
 488
 489                         vid = vlan_dev_vlan_id(upper_dev);
 490
 491                         /* br_vlan_get_info() returns -EINVAL or -ENOENT if the
 492                          * device, respectively the VID is not found, returning
 493                          * 0 means success, which is a failure for us here.
 494                          */
 495                         err = br_vlan_get_info(br, vid, &br_info);
 496                         if (err == 0) {
 497                                 NL_SET_ERR_MSG_MOD(extack,
 498                                                    "Must first remove VLAN uppers having VIDs also present in bridge");
 499                                 return false;
 500                         }
 501                 }
 502         }
 503
 504         if (!ds->vlan_filtering_is_global)
 505                 return true;
 506
 507         /* For cases where enabling/disabling VLAN awareness is global to the
 508          * switch, we need to handle the case where multiple bridges span
 509          * different ports of the same switch device and one of them has a
 510          * different setting than what is being requested.
 511          */
 512         for (i = 0; i < ds->num_ports; i++) {
 513                 struct net_device *other_bridge;
 514
 515                 other_bridge = dsa_to_port(ds, i)->bridge_dev;
 516                 if (!other_bridge)
 517                         continue;
 518                 /* If it's the same bridge, it also has same
 519                  * vlan_filtering setting => no need to check
 520                  */
 521                 if (other_bridge == dp->bridge_dev)
 522                         continue;
 523                 if (br_vlan_enabled(other_bridge) != vlan_filtering) {
 524                         NL_SET_ERR_MSG_MOD(extack,
 525                                            "VLAN filtering is a global setting");
 526                         return false;
 527                 }
 528         }
 529         return true;
 530 }
 531
 532 int dsa_port_vlan_filtering(struct dsa_port *dp, bool vlan_filtering,
 533                             struct netlink_ext_ack *extack)
 534 {
 535         struct dsa_switch *ds = dp->ds;
 536         bool apply;
 537         int err;
 538
 539         if (!ds->ops->port_vlan_filtering)
 540                 return -EOPNOTSUPP;
 541
 542         /* We are called from dsa_slave_switchdev_blocking_event(),
 543          * which is not under rcu_read_lock(), unlike
 544          * dsa_slave_switchdev_event().
 545          */
 546         rcu_read_lock();
 547         apply = dsa_port_can_apply_vlan_filtering(dp, vlan_filtering, extack);
 548         rcu_read_unlock();
 549         if (!apply)
 550                 return -EINVAL;
 551
 552         if (dsa_port_is_vlan_filtering(dp) == vlan_filtering)
 553                 return 0;
 554
 555         err = ds->ops->port_vlan_filtering(ds, dp->index, vlan_filtering,
 556                                            extack);
 557         if (err)
 558                 return err;
 559
 560         if (ds->vlan_filtering_is_global)
 561                 ds->vlan_filtering = vlan_filtering;
 562         else
 563                 dp->vlan_filtering = vlan_filtering;
 564
 565         return 0;
 566 }
 567
 568 /* This enforces legacy behavior for switch drivers which assume they can't
 569  * receive VLAN configuration when enslaved to a bridge with vlan_filtering=0
 570  */
 571 bool dsa_port_skip_vlan_configuration(struct dsa_port *dp)
 572 {
 573         struct dsa_switch *ds = dp->ds;
 574
 575         if (!dp->bridge_dev)
 576                 return false;
 577
 578         return (!ds->configure_vlan_while_not_filtering &&
 579                 !br_vlan_enabled(dp->bridge_dev));
 580 }
 581
 582 int dsa_port_ageing_time(struct dsa_port *dp, clock_t ageing_clock)
 583 {
 584         unsigned long ageing_jiffies = clock_t_to_jiffies(ageing_clock);
 585         unsigned int ageing_time = jiffies_to_msecs(ageing_jiffies);
 586         struct dsa_notifier_ageing_time_info info;
 587         int err;
 588
 589         info.ageing_time = ageing_time;
 590
 591         err = dsa_port_notify(dp, DSA_NOTIFIER_AGEING_TIME, &info);
 592         if (err)
 593                 return err;
 594
 595         dp->ageing_time = ageing_time;
 596
 597         return 0;
 598 }
 599
 600 int dsa_port_pre_bridge_flags(const struct dsa_port *dp,
 601                               struct switchdev_brport_flags flags,
 602                               struct netlink_ext_ack *extack)
 603 {
 604         struct dsa_switch *ds = dp->ds;
 605
 606         if (!ds->ops->port_pre_bridge_flags)
 607                 return -EINVAL;
 608
 609         return ds->ops->port_pre_bridge_flags(ds, dp->index, flags, extack);
 610 }
 611
 612 int dsa_port_bridge_flags(const struct dsa_port *dp,
 613                           struct switchdev_brport_flags flags,
 614                           struct netlink_ext_ack *extack)
 615 {
 616         struct dsa_switch *ds = dp->ds;
 617
 618         if (!ds->ops->port_bridge_flags)
 619                 return -EOPNOTSUPP;
 620
 621         return ds->ops->port_bridge_flags(ds, dp->index, flags, extack);
 622 }
 623
 624 int dsa_port_mrouter(struct dsa_port *dp, bool mrouter,
 625                      struct netlink_ext_ack *extack)
 626 {
 627         struct dsa_switch *ds = dp->ds;
 628
 629         if (!ds->ops->port_set_mrouter)
 630                 return -EOPNOTSUPP;
 631
 632         return ds->ops->port_set_mrouter(ds, dp->index, mrouter, extack);
 633 }
 634
 635 int dsa_port_mtu_change(struct dsa_port *dp, int new_mtu,
 636                         bool targeted_match)
 637 {
 638         struct dsa_notifier_mtu_info info = {
 639                 .sw_index = dp->ds->index,
 640                 .targeted_match = targeted_match,
 641                 .port = dp->index,
 642                 .mtu = new_mtu,
 643         };
 644
 645         return dsa_port_notify(dp, DSA_NOTIFIER_MTU, &info);
 646 }
 647
 648 int dsa_port_fdb_add(struct dsa_port *dp, const unsigned char *addr,
 649                      u16 vid)
 650 {
 651         struct dsa_notifier_fdb_info info = {
 652                 .sw_index = dp->ds->index,
 653                 .port = dp->index,
 654                 .addr = addr,
 655                 .vid = vid,
 656         };
 657
 658         return dsa_port_notify(dp, DSA_NOTIFIER_FDB_ADD, &info);
 659 }
 660
 661 int dsa_port_fdb_del(struct dsa_port *dp, const unsigned char *addr,
 662                      u16 vid)
 663 {
 664         struct dsa_notifier_fdb_info info = {
 665                 .sw_index = dp->ds->index,
 666                 .port = dp->index,
 667                 .addr = addr,
 668                 .vid = vid,
 669
 670         };
 671
 672         return dsa_port_notify(dp, DSA_NOTIFIER_FDB_DEL, &info);
 673 }
 674
 675 int dsa_port_host_fdb_add(struct dsa_port *dp, const unsigned char *addr,
 676                           u16 vid)
 677 {
 678         struct dsa_notifier_fdb_info info = {
 679                 .sw_index = dp->ds->index,
 680                 .port = dp->index,
 681                 .addr = addr,
 682                 .vid = vid,
 683         };
 684         struct dsa_port *cpu_dp = dp->cpu_dp;
 685         int err;
 686
 687         err = dev_uc_add(cpu_dp->master, addr);
 688         if (err)
 689                 return err;
 690
 691         return dsa_port_notify(dp, DSA_NOTIFIER_HOST_FDB_ADD, &info);
 692 }
 693
 694 int dsa_port_host_fdb_del(struct dsa_port *dp, const unsigned char *addr,
 695                           u16 vid)
 696 {
 697         struct dsa_notifier_fdb_info info = {
 698                 .sw_index = dp->ds->index,
 699                 .port = dp->index,
 700                 .addr = addr,
 701                 .vid = vid,
 702         };
 703         struct dsa_port *cpu_dp = dp->cpu_dp;
 704         int err;
 705
 706         err = dev_uc_del(cpu_dp->master, addr);
 707         if (err)
 708                 return err;
 709
 710         return dsa_port_notify(dp, DSA_NOTIFIER_HOST_FDB_DEL, &info);
 711 }
 712
 713 int dsa_port_fdb_dump(struct dsa_port *dp, dsa_fdb_dump_cb_t *cb, void *data)
 714 {
 715         struct dsa_switch *ds = dp->ds;
 716         int port = dp->index;
 717
 718         if (!ds->ops->port_fdb_dump)
 719                 return -EOPNOTSUPP;
 720
 721         return ds->ops->port_fdb_dump(ds, port, cb, data);
 722 }
 723
 724 int dsa_port_mdb_add(const struct dsa_port *dp,
 725                      const struct switchdev_obj_port_mdb *mdb)
 726 {
 727         struct dsa_notifier_mdb_info info = {
 728                 .sw_index = dp->ds->index,
 729                 .port = dp->index,
 730                 .mdb = mdb,
 731         };
 732
 733         return dsa_port_notify(dp, DSA_NOTIFIER_MDB_ADD, &info);
 734 }
 735
 736 int dsa_port_mdb_del(const struct dsa_port *dp,
 737                      const struct switchdev_obj_port_mdb *mdb)
 738 {
 739         struct dsa_notifier_mdb_info info = {
 740                 .sw_index = dp->ds->index,
 741                 .port = dp->index,
 742                 .mdb = mdb,
 743         };
 744
 745         return dsa_port_notify(dp, DSA_NOTIFIER_MDB_DEL, &info);
 746 }
 747
 748 int dsa_port_host_mdb_add(const struct dsa_port *dp,
 749                           const struct switchdev_obj_port_mdb *mdb)
 750 {
 751         struct dsa_notifier_mdb_info info = {
 752                 .sw_index = dp->ds->index,
 753                 .port = dp->index,
 754                 .mdb = mdb,
 755         };
 756         struct dsa_port *cpu_dp = dp->cpu_dp;
 757         int err;
 758
 759         err = dev_mc_add(cpu_dp->master, mdb->addr);
 760         if (err)
 761                 return err;
 762
 763         return dsa_port_notify(dp, DSA_NOTIFIER_HOST_MDB_ADD, &info);
 764 }
 765
 766 int dsa_port_host_mdb_del(const struct dsa_port *dp,
 767                           const struct switchdev_obj_port_mdb *mdb)
 768 {
 769         struct dsa_notifier_mdb_info info = {
 770                 .sw_index = dp->ds->index,
 771                 .port = dp->index,
 772                 .mdb = mdb,
 773         };
 774         struct dsa_port *cpu_dp = dp->cpu_dp;
 775         int err;
 776
 777         err = dev_mc_del(cpu_dp->master, mdb->addr);
 778         if (err)
 779                 return err;
 780
 781         return dsa_port_notify(dp, DSA_NOTIFIER_HOST_MDB_DEL, &info);
 782 }
 783
 784 int dsa_port_vlan_add(struct dsa_port *dp,
 785                       const struct switchdev_obj_port_vlan *vlan,
 786                       struct netlink_ext_ack *extack)
 787 {
 788         struct dsa_notifier_vlan_info info = {
 789                 .sw_index = dp->ds->index,
 790                 .port = dp->index,
 791                 .vlan = vlan,
 792                 .extack = extack,
 793         };
 794
 795         return dsa_port_notify(dp, DSA_NOTIFIER_VLAN_ADD, &info);
 796 }
 797
 798 int dsa_port_vlan_del(struct dsa_port *dp,
 799                       const struct switchdev_obj_port_vlan *vlan)
 800 {
 801         struct dsa_notifier_vlan_info info = {
 802                 .sw_index = dp->ds->index,
 803                 .port = dp->index,
 804                 .vlan = vlan,
 805         };
 806
 807         return dsa_port_notify(dp, DSA_NOTIFIER_VLAN_DEL, &info);
 808 }
 809
 810 int dsa_port_mrp_add(const struct dsa_port *dp,
 811                      const struct switchdev_obj_mrp *mrp)
 812 {
 813         struct dsa_notifier_mrp_info info = {
 814                 .sw_index = dp->ds->index,
 815                 .port = dp->index,
 816                 .mrp = mrp,
 817         };
 818
 819         return dsa_port_notify(dp, DSA_NOTIFIER_MRP_ADD, &info);
 820 }
 821
 822 int dsa_port_mrp_del(const struct dsa_port *dp,
 823                      const struct switchdev_obj_mrp *mrp)
 824 {
 825         struct dsa_notifier_mrp_info info = {
 826                 .sw_index = dp->ds->index,
 827                 .port = dp->index,
 828                 .mrp = mrp,
 829         };
 830
 831         return dsa_port_notify(dp, DSA_NOTIFIER_MRP_DEL, &info);
 832 }
 833
 834 int dsa_port_mrp_add_ring_role(const struct dsa_port *dp,
 835                                const struct switchdev_obj_ring_role_mrp *mrp)
 836 {
 837         struct dsa_notifier_mrp_ring_role_info info = {
 838                 .sw_index = dp->ds->index,
 839                 .port = dp->index,
 840                 .mrp = mrp,
 841         };
 842
 843         return dsa_port_notify(dp, DSA_NOTIFIER_MRP_ADD_RING_ROLE, &info);
 844 }
 845
 846 int dsa_port_mrp_del_ring_role(const struct dsa_port *dp,
 847                                const struct switchdev_obj_ring_role_mrp *mrp)
 848 {
 849         struct dsa_notifier_mrp_ring_role_info info = {
 850                 .sw_index = dp->ds->index,
 851                 .port = dp->index,
 852                 .mrp = mrp,
 853         };
 854
 855         return dsa_port_notify(dp, DSA_NOTIFIER_MRP_DEL_RING_ROLE, &info);
 856 }
 857
 858 void dsa_port_set_tag_protocol(struct dsa_port *cpu_dp,
 859                                const struct dsa_device_ops *tag_ops)
 860 {
 861         cpu_dp->filter = tag_ops->filter;
 862         cpu_dp->rcv = tag_ops->rcv;
 863         cpu_dp->tag_ops = tag_ops;
 864 }
 865
 866 static struct phy_device *dsa_port_get_phy_device(struct dsa_port *dp)
 867 {
 868         struct device_node *phy_dn;
 869         struct phy_device *phydev;
 870
 871         phy_dn = of_parse_phandle(dp->dn, "phy-handle", 0);
 872         if (!phy_dn)
 873                 return NULL;
 874
 875         phydev = of_phy_find_device(phy_dn);
 876         if (!phydev) {
 877                 of_node_put(phy_dn);
 878                 return ERR_PTR(-EPROBE_DEFER);
 879         }
 880
 881         of_node_put(phy_dn);
 882         return phydev;
 883 }
 884
 885 static void dsa_port_phylink_validate(struct phylink_config *config,
 886                                       unsigned long *supported,
 887                                       struct phylink_link_state *state)
 888 {
 889         struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
 890         struct dsa_switch *ds = dp->ds;
 891
 892         if (!ds->ops->phylink_validate)
 893                 return;
 894
 895         ds->ops->phylink_validate(ds, dp->index, supported, state);
 896 }
 897
 898 static void dsa_port_phylink_mac_pcs_get_state(struct phylink_config *config,
 899                                                struct phylink_link_state *state)
 900 {
 901         struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
 902         struct dsa_switch *ds = dp->ds;
 903         int err;
 904
 905         /* Only called for inband modes */
 906         if (!ds->ops->phylink_mac_link_state) {
 907                 state->link = 0;
 908                 return;
 909         }
 910
 911         err = ds->ops->phylink_mac_link_state(ds, dp->index, state);
 912         if (err < 0) {
 913                 dev_err(ds->dev, "p%d: phylink_mac_link_state() failed: %d\n",
 914                         dp->index, err);
 915                 state->link = 0;
 916         }
 917 }
 918
 919 static void dsa_port_phylink_mac_config(struct phylink_config *config,
 920                                         unsigned int mode,
 921                                         const struct phylink_link_state *state)
 922 {
 923         struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
 924         struct dsa_switch *ds = dp->ds;
 925
 926         if (!ds->ops->phylink_mac_config)
 927                 return;
 928
 929         ds->ops->phylink_mac_config(ds, dp->index, mode, state);
 930 }
 931
 932 static void dsa_port_phylink_mac_an_restart(struct phylink_config *config)
 933 {
 934         struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
 935         struct dsa_switch *ds = dp->ds;
 936
 937         if (!ds->ops->phylink_mac_an_restart)
 938                 return;
 939
 940         ds->ops->phylink_mac_an_restart(ds, dp->index);
 941 }
 942
 943 static void dsa_port_phylink_mac_link_down(struct phylink_config *config,
 944                                            unsigned int mode,
 945                                            phy_interface_t interface)
 946 {
 947         struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
 948         struct phy_device *phydev = NULL;
 949         struct dsa_switch *ds = dp->ds;
 950
 951         if (dsa_is_user_port(ds, dp->index))
 952                 phydev = dp->slave->phydev;
 953
 954         if (!ds->ops->phylink_mac_link_down) {
 955                 if (ds->ops->adjust_link && phydev)
 956                         ds->ops->adjust_link(ds, dp->index, phydev);
 957                 return;
 958         }
 959
 960         ds->ops->phylink_mac_link_down(ds, dp->index, mode, interface);
 961 }
 962
 963 static void dsa_port_phylink_mac_link_up(struct phylink_config *config,
 964                                          struct phy_device *phydev,
 965                                          unsigned int mode,
 966                                          phy_interface_t interface,
 967                                          int speed, int duplex,
 968                                          bool tx_pause, bool rx_pause)
 969 {
 970         struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
 971         struct dsa_switch *ds = dp->ds;
 972
 973         if (!ds->ops->phylink_mac_link_up) {
 974                 if (ds->ops->adjust_link && phydev)
 975                         ds->ops->adjust_link(ds, dp->index, phydev);
 976                 return;
 977         }
 978
 979         ds->ops->phylink_mac_link_up(ds, dp->index, mode, interface, phydev,
 980                                      speed, duplex, tx_pause, rx_pause);
 981 }
 982
 983 const struct phylink_mac_ops dsa_port_phylink_mac_ops = {
 984         .validate = dsa_port_phylink_validate,
 985         .mac_pcs_get_state = dsa_port_phylink_mac_pcs_get_state,
 986         .mac_config = dsa_port_phylink_mac_config,
 987         .mac_an_restart = dsa_port_phylink_mac_an_restart,
 988         .mac_link_down = dsa_port_phylink_mac_link_down,
 989         .mac_link_up = dsa_port_phylink_mac_link_up,
 990 };
 991
 992 static int dsa_port_setup_phy_of(struct dsa_port *dp, bool enable)
 993 {
 994         struct dsa_switch *ds = dp->ds;
 995         struct phy_device *phydev;
 996         int port = dp->index;
 997         int err = 0;
 998
 999         phydev = dsa_port_get_phy_device(dp);
1000         if (!phydev)
1001                 return 0;
1002
1003         if (IS_ERR(phydev))
1004                 return PTR_ERR(phydev);
1005
1006         if (enable) {
1007                 err = genphy_resume(phydev);
1008                 if (err < 0)
1009                         goto err_put_dev;
1010
1011                 err = genphy_read_status(phydev);
1012                 if (err < 0)
1013                         goto err_put_dev;
1014         } else {
1015                 err = genphy_suspend(phydev);
1016                 if (err < 0)
1017                         goto err_put_dev;
1018         }
1019
1020         if (ds->ops->adjust_link)
1021                 ds->ops->adjust_link(ds, port, phydev);
1022
1023         dev_dbg(ds->dev, "enabled port's phy: %s", phydev_name(phydev));
1024
1025 err_put_dev:
1026         put_device(&phydev->mdio.dev);
1027         return err;
1028 }
1029
1030 static int dsa_port_fixed_link_register_of(struct dsa_port *dp)
1031 {
1032         struct device_node *dn = dp->dn;
1033         struct dsa_switch *ds = dp->ds;
1034         struct phy_device *phydev;
1035         int port = dp->index;
1036         phy_interface_t mode;
1037         int err;
1038
1039         err = of_phy_register_fixed_link(dn);
1040         if (err) {
1041                 dev_err(ds->dev,
1042                         "failed to register the fixed PHY of port %d\n",
1043                         port);
1044                 return err;
1045         }
1046
1047         phydev = of_phy_find_device(dn);
1048
1049         err = of_get_phy_mode(dn, &mode);
1050         if (err)
1051                 mode = PHY_INTERFACE_MODE_NA;
1052         phydev->interface = mode;
1053
1054         genphy_read_status(phydev);
1055
1056         if (ds->ops->adjust_link)
1057                 ds->ops->adjust_link(ds, port, phydev);
1058
1059         put_device(&phydev->mdio.dev);
1060
1061         return 0;
1062 }
1063
1064 static int dsa_port_phylink_register(struct dsa_port *dp)
1065 {
1066         struct dsa_switch *ds = dp->ds;
1067         struct device_node *port_dn = dp->dn;
1068         phy_interface_t mode;
1069         int err;
1070
1071         err = of_get_phy_mode(port_dn, &mode);
1072         if (err)
1073                 mode = PHY_INTERFACE_MODE_NA;
1074
1075         dp->pl_config.dev = ds->dev;
1076         dp->pl_config.type = PHYLINK_DEV;
1077         dp->pl_config.pcs_poll = ds->pcs_poll;
1078
1079         dp->pl = phylink_create(&dp->pl_config, of_fwnode_handle(port_dn),
1080                                 mode, &dsa_port_phylink_mac_ops);
1081         if (IS_ERR(dp->pl)) {
1082                 pr_err("error creating PHYLINK: %ld\n", PTR_ERR(dp->pl));
1083                 return PTR_ERR(dp->pl);
1084         }
1085
1086         err = phylink_of_phy_connect(dp->pl, port_dn, 0);
1087         if (err && err != -ENODEV) {
1088                 pr_err("could not attach to PHY: %d\n", err);
1089                 goto err_phy_connect;
1090         }
1091
1092         return 0;
1093
1094 err_phy_connect:
1095         phylink_destroy(dp->pl);
1096         return err;
1097 }
1098
1099 int dsa_port_link_register_of(struct dsa_port *dp)
1100 {
1101         struct dsa_switch *ds = dp->ds;
1102         struct device_node *phy_np;
1103         int port = dp->index;
1104
1105         if (!ds->ops->adjust_link) {
1106                 phy_np = of_parse_phandle(dp->dn, "phy-handle", 0);
1107                 if (of_phy_is_fixed_link(dp->dn) || phy_np) {
1108                         if (ds->ops->phylink_mac_link_down)
1109                                 ds->ops->phylink_mac_link_down(ds, port,
1110                                         MLO_AN_FIXED, PHY_INTERFACE_MODE_NA);
1111                         return dsa_port_phylink_register(dp);
1112                 }
1113                 return 0;
1114         }
1115
1116         dev_warn(ds->dev,
1117                  "Using legacy PHYLIB callbacks. Please migrate to PHYLINK!\n");
1118
1119         if (of_phy_is_fixed_link(dp->dn))
1120                 return dsa_port_fixed_link_register_of(dp);
1121         else
1122                 return dsa_port_setup_phy_of(dp, true);
1123 }
1124
1125 void dsa_port_link_unregister_of(struct dsa_port *dp)
1126 {
1127         struct dsa_switch *ds = dp->ds;
1128
1129         if (!ds->ops->adjust_link && dp->pl) {
1130                 rtnl_lock();
1131                 phylink_disconnect_phy(dp->pl);
1132                 rtnl_unlock();
1133                 phylink_destroy(dp->pl);
1134                 dp->pl = NULL;
1135                 return;
1136         }
1137
1138         if (of_phy_is_fixed_link(dp->dn))
1139                 of_phy_deregister_fixed_link(dp->dn);
1140         else
1141                 dsa_port_setup_phy_of(dp, false);
1142 }
1143
1144 int dsa_port_get_phy_strings(struct dsa_port *dp, uint8_t *data)
1145 {
1146         struct phy_device *phydev;
1147         int ret = -EOPNOTSUPP;
1148
1149         if (of_phy_is_fixed_link(dp->dn))
1150                 return ret;
1151
1152         phydev = dsa_port_get_phy_device(dp);
1153         if (IS_ERR_OR_NULL(phydev))
1154                 return ret;
1155
1156         ret = phy_ethtool_get_strings(phydev, data);
1157         put_device(&phydev->mdio.dev);
1158
1159         return ret;
1160 }
1161 EXPORT_SYMBOL_GPL(dsa_port_get_phy_strings);
1162
1163 int dsa_port_get_ethtool_phy_stats(struct dsa_port *dp, uint64_t *data)
1164 {
1165         struct phy_device *phydev;
1166         int ret = -EOPNOTSUPP;
1167
1168         if (of_phy_is_fixed_link(dp->dn))
1169                 return ret;
1170
1171         phydev = dsa_port_get_phy_device(dp);
1172         if (IS_ERR_OR_NULL(phydev))
1173                 return ret;
1174
1175         ret = phy_ethtool_get_stats(phydev, NULL, data);
1176         put_device(&phydev->mdio.dev);
1177
1178         return ret;
1179 }
1180 EXPORT_SYMBOL_GPL(dsa_port_get_ethtool_phy_stats);
1181
1182 int dsa_port_get_phy_sset_count(struct dsa_port *dp)
1183 {
1184         struct phy_device *phydev;
1185         int ret = -EOPNOTSUPP;
1186
1187         if (of_phy_is_fixed_link(dp->dn))
1188                 return ret;
1189
1190         phydev = dsa_port_get_phy_device(dp);
1191         if (IS_ERR_OR_NULL(phydev))
1192                 return ret;
1193
1194         ret = phy_ethtool_get_sset_count(phydev);
1195         put_device(&phydev->mdio.dev);
1196
1197         return ret;
1198 }
1199 EXPORT_SYMBOL_GPL(dsa_port_get_phy_sset_count);
1200
1201 int dsa_port_hsr_join(struct dsa_port *dp, struct net_device *hsr)
1202 {
1203         struct dsa_notifier_hsr_info info = {
1204                 .sw_index = dp->ds->index,
1205                 .port = dp->index,
1206                 .hsr = hsr,
1207         };
1208         int err;
1209
1210         dp->hsr_dev = hsr;
1211
1212         err = dsa_port_notify(dp, DSA_NOTIFIER_HSR_JOIN, &info);
1213         if (err)
1214                 dp->hsr_dev = NULL;
1215
1216         return err;
1217 }
1218
1219 void dsa_port_hsr_leave(struct dsa_port *dp, struct net_device *hsr)
1220 {
1221         struct dsa_notifier_hsr_info info = {
1222                 .sw_index = dp->ds->index,
1223                 .port = dp->index,
1224                 .hsr = hsr,
1225         };
1226         int err;
1227
1228         dp->hsr_dev = NULL;
1229
1230         err = dsa_port_notify(dp, DSA_NOTIFIER_HSR_LEAVE, &info);
1231         if (err)
1232                 pr_err("DSA: failed to notify DSA_NOTIFIER_HSR_LEAVE\n");
1233 }
1234
1235 int dsa_port_tag_8021q_vlan_add(struct dsa_port *dp, u16 vid)
1236 {
1237         struct dsa_notifier_tag_8021q_vlan_info info = {
1238                 .tree_index = dp->ds->dst->index,
1239                 .sw_index = dp->ds->index,
1240                 .port = dp->index,
1241                 .vid = vid,
1242         };
1243
1244         return dsa_broadcast(DSA_NOTIFIER_TAG_8021Q_VLAN_ADD, &info);
1245 }
1246
1247 void dsa_port_tag_8021q_vlan_del(struct dsa_port *dp, u16 vid)
1248 {
1249         struct dsa_notifier_tag_8021q_vlan_info info = {
1250                 .tree_index = dp->ds->dst->index,
1251                 .sw_index = dp->ds->index,
1252                 .port = dp->index,
1253                 .vid = vid,
1254         };
1255         int err;
1256
1257         err = dsa_broadcast(DSA_NOTIFIER_TAG_8021Q_VLAN_DEL, &info);
1258         if (err)
1259                 pr_err("DSA: failed to notify tag_8021q VLAN deletion: %pe\n",
1260                        ERR_PTR(err));
1261 }