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 static void dsa_port_fast_age(const struct dsa_port *dp)
  34 {
  35         struct dsa_switch *ds = dp->ds;
  36
  37         if (!ds->ops->port_fast_age)
  38                 return;
  39
  40         ds->ops->port_fast_age(ds, dp->index);
  41 }
  42
  43 int dsa_port_set_state(struct dsa_port *dp, u8 state, bool do_fast_age)
  44 {
  45         struct dsa_switch *ds = dp->ds;
  46         int port = dp->index;
  47
  48         if (!ds->ops->port_stp_state_set)
  49                 return -EOPNOTSUPP;
  50
  51         ds->ops->port_stp_state_set(ds, port, state);
  52
  53         if (do_fast_age && dp->learning) {
  54                 /* Fast age FDB entries or flush appropriate forwarding database
  55                  * for the given port, if we are moving it from Learning or
  56                  * Forwarding state, to Disabled or Blocking or Listening state.
  57                  * Ports that were standalone before the STP state change don't
  58                  * need to fast age the FDB, since address learning is off in
  59                  * standalone mode.
  60                  */
  61
  62                 if ((dp->stp_state == BR_STATE_LEARNING ||
  63                      dp->stp_state == BR_STATE_FORWARDING) &&
  64                     (state == BR_STATE_DISABLED ||
  65                      state == BR_STATE_BLOCKING ||
  66                      state == BR_STATE_LISTENING))
  67                         dsa_port_fast_age(dp);
  68         }
  69
  70         dp->stp_state = state;
  71
  72         return 0;
  73 }
  74
  75 static void dsa_port_set_state_now(struct dsa_port *dp, u8 state,
  76                                    bool do_fast_age)
  77 {
  78         int err;
  79
  80         err = dsa_port_set_state(dp, state, do_fast_age);
  81         if (err)
  82                 pr_err("DSA: failed to set STP state %u (%d)\n", state, err);
  83 }
  84
  85 int dsa_port_enable_rt(struct dsa_port *dp, struct phy_device *phy)
  86 {
  87         struct dsa_switch *ds = dp->ds;
  88         int port = dp->index;
  89         int err;
  90
  91         if (ds->ops->port_enable) {
  92                 err = ds->ops->port_enable(ds, port, phy);
  93                 if (err)
  94                         return err;
  95         }
  96
  97         if (!dp->bridge_dev)
  98                 dsa_port_set_state_now(dp, BR_STATE_FORWARDING, false);
  99
 100         if (dp->pl)
 101                 phylink_start(dp->pl);
 102
 103         return 0;
 104 }
 105
 106 int dsa_port_enable(struct dsa_port *dp, struct phy_device *phy)
 107 {
 108         int err;
 109
 110         rtnl_lock();
 111         err = dsa_port_enable_rt(dp, phy);
 112         rtnl_unlock();
 113
 114         return err;
 115 }
 116
 117 void dsa_port_disable_rt(struct dsa_port *dp)
 118 {
 119         struct dsa_switch *ds = dp->ds;
 120         int port = dp->index;
 121
 122         if (dp->pl)
 123                 phylink_stop(dp->pl);
 124
 125         if (!dp->bridge_dev)
 126                 dsa_port_set_state_now(dp, BR_STATE_DISABLED, false);
 127
 128         if (ds->ops->port_disable)
 129                 ds->ops->port_disable(ds, port);
 130 }
 131
 132 void dsa_port_disable(struct dsa_port *dp)
 133 {
 134         rtnl_lock();
 135         dsa_port_disable_rt(dp);
 136         rtnl_unlock();
 137 }
 138
 139 static int dsa_port_inherit_brport_flags(struct dsa_port *dp,
 140                                          struct netlink_ext_ack *extack)
 141 {
 142         const unsigned long mask = BR_LEARNING | BR_FLOOD | BR_MCAST_FLOOD |
 143                                    BR_BCAST_FLOOD;
 144         struct net_device *brport_dev = dsa_port_to_bridge_port(dp);
 145         int flag, err;
 146
 147         for_each_set_bit(flag, &mask, 32) {
 148                 struct switchdev_brport_flags flags = {0};
 149
 150                 flags.mask = BIT(flag);
 151
 152                 if (br_port_flag_is_set(brport_dev, BIT(flag)))
 153                         flags.val = BIT(flag);
 154
 155                 err = dsa_port_bridge_flags(dp, flags, extack);
 156                 if (err && err != -EOPNOTSUPP)
 157                         return err;
 158         }
 159
 160         return 0;
 161 }
 162
 163 static void dsa_port_clear_brport_flags(struct dsa_port *dp)
 164 {
 165         const unsigned long val = BR_FLOOD | BR_MCAST_FLOOD | BR_BCAST_FLOOD;
 166         const unsigned long mask = BR_LEARNING | BR_FLOOD | BR_MCAST_FLOOD |
 167                                    BR_BCAST_FLOOD;
 168         int flag, err;
 169
 170         for_each_set_bit(flag, &mask, 32) {
 171                 struct switchdev_brport_flags flags = {0};
 172
 173                 flags.mask = BIT(flag);
 174                 flags.val = val & BIT(flag);
 175
 176                 err = dsa_port_bridge_flags(dp, flags, NULL);
 177                 if (err && err != -EOPNOTSUPP)
 178                         dev_err(dp->ds->dev,
 179                                 "failed to clear bridge port flag %lu: %pe\n",
 180                                 flags.val, ERR_PTR(err));
 181         }
 182 }
 183
 184 static int dsa_port_switchdev_sync_attrs(struct dsa_port *dp,
 185                                          struct netlink_ext_ack *extack)
 186 {
 187         struct net_device *brport_dev = dsa_port_to_bridge_port(dp);
 188         struct net_device *br = dp->bridge_dev;
 189         int err;
 190
 191         err = dsa_port_inherit_brport_flags(dp, extack);
 192         if (err)
 193                 return err;
 194
 195         err = dsa_port_set_state(dp, br_port_get_stp_state(brport_dev), false);
 196         if (err && err != -EOPNOTSUPP)
 197                 return err;
 198
 199         err = dsa_port_vlan_filtering(dp, br_vlan_enabled(br), extack);
 200         if (err && err != -EOPNOTSUPP)
 201                 return err;
 202
 203         err = dsa_port_ageing_time(dp, br_get_ageing_time(br));
 204         if (err && err != -EOPNOTSUPP)
 205                 return err;
 206
 207         return 0;
 208 }
 209
 210 static void dsa_port_switchdev_unsync_attrs(struct dsa_port *dp)
 211 {
 212         /* Configure the port for standalone mode (no address learning,
 213          * flood everything).
 214          * The bridge only emits SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS events
 215          * when the user requests it through netlink or sysfs, but not
 216          * automatically at port join or leave, so we need to handle resetting
 217          * the brport flags ourselves. But we even prefer it that way, because
 218          * otherwise, some setups might never get the notification they need,
 219          * for example, when a port leaves a LAG that offloads the bridge,
 220          * it becomes standalone, but as far as the bridge is concerned, no
 221          * port ever left.
 222          */
 223         dsa_port_clear_brport_flags(dp);
 224
 225         /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
 226          * so allow it to be in BR_STATE_FORWARDING to be kept functional
 227          */
 228         dsa_port_set_state_now(dp, BR_STATE_FORWARDING, true);
 229
 230         /* VLAN filtering is handled by dsa_switch_bridge_leave */
 231
 232         /* Ageing time may be global to the switch chip, so don't change it
 233          * here because we have no good reason (or value) to change it to.
 234          */
 235 }
 236
 237 static int dsa_tree_find_bridge_num(struct dsa_switch_tree *dst,
 238                                     struct net_device *bridge_dev)
 239 {
 240         struct dsa_port *dp;
 241
 242         /* When preparing the offload for a port, it will have a valid
 243          * dp->bridge_dev pointer but a not yet valid dp->bridge_num.
 244          * However there might be other ports having the same dp->bridge_dev
 245          * and a valid dp->bridge_num, so just ignore this port.
 246          */
 247         list_for_each_entry(dp, &dst->ports, list)
 248                 if (dp->bridge_dev == bridge_dev && dp->bridge_num != -1)
 249                         return dp->bridge_num;
 250
 251         return -1;
 252 }
 253
 254 static void dsa_port_bridge_tx_fwd_unoffload(struct dsa_port *dp,
 255                                              struct net_device *bridge_dev)
 256 {
 257         struct dsa_switch_tree *dst = dp->ds->dst;
 258         int bridge_num = dp->bridge_num;
 259         struct dsa_switch *ds = dp->ds;
 260
 261         /* No bridge TX forwarding offload => do nothing */
 262         if (!ds->ops->port_bridge_tx_fwd_unoffload || dp->bridge_num == -1)
 263                 return;
 264
 265         dp->bridge_num = -1;
 266
 267         /* Check if the bridge is still in use, otherwise it is time
 268          * to clean it up so we can reuse this bridge_num later.
 269          */
 270         if (!dsa_tree_find_bridge_num(dst, bridge_dev))
 271                 clear_bit(bridge_num, &dst->fwd_offloading_bridges);
 272
 273         /* Notify the chips only once the offload has been deactivated, so
 274          * that they can update their configuration accordingly.
 275          */
 276         ds->ops->port_bridge_tx_fwd_unoffload(ds, dp->index, bridge_dev,
 277                                               bridge_num);
 278 }
 279
 280 static bool dsa_port_bridge_tx_fwd_offload(struct dsa_port *dp,
 281                                            struct net_device *bridge_dev)
 282 {
 283         struct dsa_switch_tree *dst = dp->ds->dst;
 284         struct dsa_switch *ds = dp->ds;
 285         int bridge_num, err;
 286
 287         if (!ds->ops->port_bridge_tx_fwd_offload)
 288                 return false;
 289
 290         bridge_num = dsa_tree_find_bridge_num(dst, bridge_dev);
 291         if (bridge_num < 0) {
 292                 /* First port that offloads TX forwarding for this bridge */
 293                 bridge_num = find_first_zero_bit(&dst->fwd_offloading_bridges,
 294                                                  DSA_MAX_NUM_OFFLOADING_BRIDGES);
 295                 if (bridge_num >= ds->num_fwd_offloading_bridges)
 296                         return false;
 297
 298                 set_bit(bridge_num, &dst->fwd_offloading_bridges);
 299         }
 300
 301         dp->bridge_num = bridge_num;
 302
 303         /* Notify the driver */
 304         err = ds->ops->port_bridge_tx_fwd_offload(ds, dp->index, bridge_dev,
 305                                                   bridge_num);
 306         if (err) {
 307                 dsa_port_bridge_tx_fwd_unoffload(dp, bridge_dev);
 308                 return false;
 309         }
 310
 311         return true;
 312 }
 313
 314 int dsa_port_bridge_join(struct dsa_port *dp, struct net_device *br,
 315                          struct netlink_ext_ack *extack)
 316 {
 317         struct dsa_notifier_bridge_info info = {
 318                 .tree_index = dp->ds->dst->index,
 319                 .sw_index = dp->ds->index,
 320                 .port = dp->index,
 321                 .br = br,
 322         };
 323         struct net_device *dev = dp->slave;
 324         struct net_device *brport_dev;
 325         bool tx_fwd_offload;
 326         int err;
 327
 328         /* Here the interface is already bridged. Reflect the current
 329          * configuration so that drivers can program their chips accordingly.
 330          */
 331         dp->bridge_dev = br;
 332
 333         brport_dev = dsa_port_to_bridge_port(dp);
 334
 335         err = dsa_broadcast(DSA_NOTIFIER_BRIDGE_JOIN, &info);
 336         if (err)
 337                 goto out_rollback;
 338
 339         tx_fwd_offload = dsa_port_bridge_tx_fwd_offload(dp, br);
 340
 341         err = switchdev_bridge_port_offload(brport_dev, dev, dp,
 342                                             &dsa_slave_switchdev_notifier,
 343                                             &dsa_slave_switchdev_blocking_notifier,
 344                                             tx_fwd_offload, extack);
 345         if (err)
 346                 goto out_rollback_unbridge;
 347
 348         err = dsa_port_switchdev_sync_attrs(dp, extack);
 349         if (err)
 350                 goto out_rollback_unoffload;
 351
 352         return 0;
 353
 354 out_rollback_unoffload:
 355         switchdev_bridge_port_unoffload(brport_dev, dp,
 356                                         &dsa_slave_switchdev_notifier,
 357                                         &dsa_slave_switchdev_blocking_notifier);
 358 out_rollback_unbridge:
 359         dsa_broadcast(DSA_NOTIFIER_BRIDGE_LEAVE, &info);
 360 out_rollback:
 361         dp->bridge_dev = NULL;
 362         return err;
 363 }
 364
 365 void dsa_port_pre_bridge_leave(struct dsa_port *dp, struct net_device *br)
 366 {
 367         struct net_device *brport_dev = dsa_port_to_bridge_port(dp);
 368
 369         switchdev_bridge_port_unoffload(brport_dev, dp,
 370                                         &dsa_slave_switchdev_notifier,
 371                                         &dsa_slave_switchdev_blocking_notifier);
 372 }
 373
 374 void dsa_port_bridge_leave(struct dsa_port *dp, struct net_device *br)
 375 {
 376         struct dsa_notifier_bridge_info info = {
 377                 .tree_index = dp->ds->dst->index,
 378                 .sw_index = dp->ds->index,
 379                 .port = dp->index,
 380                 .br = br,
 381         };
 382         int err;
 383
 384         /* Here the port is already unbridged. Reflect the current configuration
 385          * so that drivers can program their chips accordingly.
 386          */
 387         dp->bridge_dev = NULL;
 388
 389         dsa_port_bridge_tx_fwd_unoffload(dp, br);
 390
 391         err = dsa_broadcast(DSA_NOTIFIER_BRIDGE_LEAVE, &info);
 392         if (err)
 393                 pr_err("DSA: failed to notify DSA_NOTIFIER_BRIDGE_LEAVE\n");
 394
 395         dsa_port_switchdev_unsync_attrs(dp);
 396 }
 397
 398 int dsa_port_lag_change(struct dsa_port *dp,
 399                         struct netdev_lag_lower_state_info *linfo)
 400 {
 401         struct dsa_notifier_lag_info info = {
 402                 .sw_index = dp->ds->index,
 403                 .port = dp->index,
 404         };
 405         bool tx_enabled;
 406
 407         if (!dp->lag_dev)
 408                 return 0;
 409
 410         /* On statically configured aggregates (e.g. loadbalance
 411          * without LACP) ports will always be tx_enabled, even if the
 412          * link is down. Thus we require both link_up and tx_enabled
 413          * in order to include it in the tx set.
 414          */
 415         tx_enabled = linfo->link_up && linfo->tx_enabled;
 416
 417         if (tx_enabled == dp->lag_tx_enabled)
 418                 return 0;
 419
 420         dp->lag_tx_enabled = tx_enabled;
 421
 422         return dsa_port_notify(dp, DSA_NOTIFIER_LAG_CHANGE, &info);
 423 }
 424
 425 int dsa_port_lag_join(struct dsa_port *dp, struct net_device *lag,
 426                       struct netdev_lag_upper_info *uinfo,
 427                       struct netlink_ext_ack *extack)
 428 {
 429         struct dsa_notifier_lag_info info = {
 430                 .sw_index = dp->ds->index,
 431                 .port = dp->index,
 432                 .lag = lag,
 433                 .info = uinfo,
 434         };
 435         struct net_device *bridge_dev;
 436         int err;
 437
 438         dsa_lag_map(dp->ds->dst, lag);
 439         dp->lag_dev = lag;
 440
 441         err = dsa_port_notify(dp, DSA_NOTIFIER_LAG_JOIN, &info);
 442         if (err)
 443                 goto err_lag_join;
 444
 445         bridge_dev = netdev_master_upper_dev_get(lag);
 446         if (!bridge_dev || !netif_is_bridge_master(bridge_dev))
 447                 return 0;
 448
 449         err = dsa_port_bridge_join(dp, bridge_dev, extack);
 450         if (err)
 451                 goto err_bridge_join;
 452
 453         return 0;
 454
 455 err_bridge_join:
 456         dsa_port_notify(dp, DSA_NOTIFIER_LAG_LEAVE, &info);
 457 err_lag_join:
 458         dp->lag_dev = NULL;
 459         dsa_lag_unmap(dp->ds->dst, lag);
 460         return err;
 461 }
 462
 463 void dsa_port_pre_lag_leave(struct dsa_port *dp, struct net_device *lag)
 464 {
 465         if (dp->bridge_dev)
 466                 dsa_port_pre_bridge_leave(dp, dp->bridge_dev);
 467 }
 468
 469 void dsa_port_lag_leave(struct dsa_port *dp, struct net_device *lag)
 470 {
 471         struct dsa_notifier_lag_info info = {
 472                 .sw_index = dp->ds->index,
 473                 .port = dp->index,
 474                 .lag = lag,
 475         };
 476         int err;
 477
 478         if (!dp->lag_dev)
 479                 return;
 480
 481         /* Port might have been part of a LAG that in turn was
 482          * attached to a bridge.
 483          */
 484         if (dp->bridge_dev)
 485                 dsa_port_bridge_leave(dp, dp->bridge_dev);
 486
 487         dp->lag_tx_enabled = false;
 488         dp->lag_dev = NULL;
 489
 490         err = dsa_port_notify(dp, DSA_NOTIFIER_LAG_LEAVE, &info);
 491         if (err)
 492                 pr_err("DSA: failed to notify DSA_NOTIFIER_LAG_LEAVE: %d\n",
 493                        err);
 494
 495         dsa_lag_unmap(dp->ds->dst, lag);
 496 }
 497
 498 /* Must be called under rcu_read_lock() */
 499 static bool dsa_port_can_apply_vlan_filtering(struct dsa_port *dp,
 500                                               bool vlan_filtering,
 501                                               struct netlink_ext_ack *extack)
 502 {
 503         struct dsa_switch *ds = dp->ds;
 504         int err, i;
 505
 506         /* VLAN awareness was off, so the question is "can we turn it on".
 507          * We may have had 8021q uppers, those need to go. Make sure we don't
 508          * enter an inconsistent state: deny changing the VLAN awareness state
 509          * as long as we have 8021q uppers.
 510          */
 511         if (vlan_filtering && dsa_is_user_port(ds, dp->index)) {
 512                 struct net_device *upper_dev, *slave = dp->slave;
 513                 struct net_device *br = dp->bridge_dev;
 514                 struct list_head *iter;
 515
 516                 netdev_for_each_upper_dev_rcu(slave, upper_dev, iter) {
 517                         struct bridge_vlan_info br_info;
 518                         u16 vid;
 519
 520                         if (!is_vlan_dev(upper_dev))
 521                                 continue;
 522
 523                         vid = vlan_dev_vlan_id(upper_dev);
 524
 525                         /* br_vlan_get_info() returns -EINVAL or -ENOENT if the
 526                          * device, respectively the VID is not found, returning
 527                          * 0 means success, which is a failure for us here.
 528                          */
 529                         err = br_vlan_get_info(br, vid, &br_info);
 530                         if (err == 0) {
 531                                 NL_SET_ERR_MSG_MOD(extack,
 532                                                    "Must first remove VLAN uppers having VIDs also present in bridge");
 533                                 return false;
 534                         }
 535                 }
 536         }
 537
 538         if (!ds->vlan_filtering_is_global)
 539                 return true;
 540
 541         /* For cases where enabling/disabling VLAN awareness is global to the
 542          * switch, we need to handle the case where multiple bridges span
 543          * different ports of the same switch device and one of them has a
 544          * different setting than what is being requested.
 545          */
 546         for (i = 0; i < ds->num_ports; i++) {
 547                 struct net_device *other_bridge;
 548
 549                 other_bridge = dsa_to_port(ds, i)->bridge_dev;
 550                 if (!other_bridge)
 551                         continue;
 552                 /* If it's the same bridge, it also has same
 553                  * vlan_filtering setting => no need to check
 554                  */
 555                 if (other_bridge == dp->bridge_dev)
 556                         continue;
 557                 if (br_vlan_enabled(other_bridge) != vlan_filtering) {
 558                         NL_SET_ERR_MSG_MOD(extack,
 559                                            "VLAN filtering is a global setting");
 560                         return false;
 561                 }
 562         }
 563         return true;
 564 }
 565
 566 int dsa_port_vlan_filtering(struct dsa_port *dp, bool vlan_filtering,
 567                             struct netlink_ext_ack *extack)
 568 {
 569         struct dsa_switch *ds = dp->ds;
 570         bool apply;
 571         int err;
 572
 573         if (!ds->ops->port_vlan_filtering)
 574                 return -EOPNOTSUPP;
 575
 576         /* We are called from dsa_slave_switchdev_blocking_event(),
 577          * which is not under rcu_read_lock(), unlike
 578          * dsa_slave_switchdev_event().
 579          */
 580         rcu_read_lock();
 581         apply = dsa_port_can_apply_vlan_filtering(dp, vlan_filtering, extack);
 582         rcu_read_unlock();
 583         if (!apply)
 584                 return -EINVAL;
 585
 586         if (dsa_port_is_vlan_filtering(dp) == vlan_filtering)
 587                 return 0;
 588
 589         err = ds->ops->port_vlan_filtering(ds, dp->index, vlan_filtering,
 590                                            extack);
 591         if (err)
 592                 return err;
 593
 594         if (ds->vlan_filtering_is_global)
 595                 ds->vlan_filtering = vlan_filtering;
 596         else
 597                 dp->vlan_filtering = vlan_filtering;
 598
 599         return 0;
 600 }
 601
 602 /* This enforces legacy behavior for switch drivers which assume they can't
 603  * receive VLAN configuration when enslaved to a bridge with vlan_filtering=0
 604  */
 605 bool dsa_port_skip_vlan_configuration(struct dsa_port *dp)
 606 {
 607         struct dsa_switch *ds = dp->ds;
 608
 609         if (!dp->bridge_dev)
 610                 return false;
 611
 612         return (!ds->configure_vlan_while_not_filtering &&
 613                 !br_vlan_enabled(dp->bridge_dev));
 614 }
 615
 616 int dsa_port_ageing_time(struct dsa_port *dp, clock_t ageing_clock)
 617 {
 618         unsigned long ageing_jiffies = clock_t_to_jiffies(ageing_clock);
 619         unsigned int ageing_time = jiffies_to_msecs(ageing_jiffies);
 620         struct dsa_notifier_ageing_time_info info;
 621         int err;
 622
 623         info.ageing_time = ageing_time;
 624
 625         err = dsa_port_notify(dp, DSA_NOTIFIER_AGEING_TIME, &info);
 626         if (err)
 627                 return err;
 628
 629         dp->ageing_time = ageing_time;
 630
 631         return 0;
 632 }
 633
 634 int dsa_port_pre_bridge_flags(const struct dsa_port *dp,
 635                               struct switchdev_brport_flags flags,
 636                               struct netlink_ext_ack *extack)
 637 {
 638         struct dsa_switch *ds = dp->ds;
 639
 640         if (!ds->ops->port_pre_bridge_flags)
 641                 return -EINVAL;
 642
 643         return ds->ops->port_pre_bridge_flags(ds, dp->index, flags, extack);
 644 }
 645
 646 int dsa_port_bridge_flags(struct dsa_port *dp,
 647                           struct switchdev_brport_flags flags,
 648                           struct netlink_ext_ack *extack)
 649 {
 650         struct dsa_switch *ds = dp->ds;
 651         int err;
 652
 653         if (!ds->ops->port_bridge_flags)
 654                 return -EOPNOTSUPP;
 655
 656         err = ds->ops->port_bridge_flags(ds, dp->index, flags, extack);
 657         if (err)
 658                 return err;
 659
 660         if (flags.mask & BR_LEARNING) {
 661                 bool learning = flags.val & BR_LEARNING;
 662
 663                 if (learning == dp->learning)
 664                         return 0;
 665
 666                 if (dp->learning && !learning)
 667                         dsa_port_fast_age(dp);
 668
 669                 dp->learning = learning;
 670         }
 671
 672         return 0;
 673 }
 674
 675 int dsa_port_mtu_change(struct dsa_port *dp, int new_mtu,
 676                         bool targeted_match)
 677 {
 678         struct dsa_notifier_mtu_info info = {
 679                 .sw_index = dp->ds->index,
 680                 .targeted_match = targeted_match,
 681                 .port = dp->index,
 682                 .mtu = new_mtu,
 683         };
 684
 685         return dsa_port_notify(dp, DSA_NOTIFIER_MTU, &info);
 686 }
 687
 688 int dsa_port_fdb_add(struct dsa_port *dp, const unsigned char *addr,
 689                      u16 vid)
 690 {
 691         struct dsa_notifier_fdb_info info = {
 692                 .sw_index = dp->ds->index,
 693                 .port = dp->index,
 694                 .addr = addr,
 695                 .vid = vid,
 696         };
 697
 698         return dsa_port_notify(dp, DSA_NOTIFIER_FDB_ADD, &info);
 699 }
 700
 701 int dsa_port_fdb_del(struct dsa_port *dp, const unsigned char *addr,
 702                      u16 vid)
 703 {
 704         struct dsa_notifier_fdb_info info = {
 705                 .sw_index = dp->ds->index,
 706                 .port = dp->index,
 707                 .addr = addr,
 708                 .vid = vid,
 709
 710         };
 711
 712         return dsa_port_notify(dp, DSA_NOTIFIER_FDB_DEL, &info);
 713 }
 714
 715 int dsa_port_host_fdb_add(struct dsa_port *dp, const unsigned char *addr,
 716                           u16 vid)
 717 {
 718         struct dsa_notifier_fdb_info info = {
 719                 .sw_index = dp->ds->index,
 720                 .port = dp->index,
 721                 .addr = addr,
 722                 .vid = vid,
 723         };
 724         struct dsa_port *cpu_dp = dp->cpu_dp;
 725         int err;
 726
 727         err = dev_uc_add(cpu_dp->master, addr);
 728         if (err)
 729                 return err;
 730
 731         return dsa_port_notify(dp, DSA_NOTIFIER_HOST_FDB_ADD, &info);
 732 }
 733
 734 int dsa_port_host_fdb_del(struct dsa_port *dp, const unsigned char *addr,
 735                           u16 vid)
 736 {
 737         struct dsa_notifier_fdb_info info = {
 738                 .sw_index = dp->ds->index,
 739                 .port = dp->index,
 740                 .addr = addr,
 741                 .vid = vid,
 742         };
 743         struct dsa_port *cpu_dp = dp->cpu_dp;
 744         int err;
 745
 746         err = dev_uc_del(cpu_dp->master, addr);
 747         if (err)
 748                 return err;
 749
 750         return dsa_port_notify(dp, DSA_NOTIFIER_HOST_FDB_DEL, &info);
 751 }
 752
 753 int dsa_port_fdb_dump(struct dsa_port *dp, dsa_fdb_dump_cb_t *cb, void *data)
 754 {
 755         struct dsa_switch *ds = dp->ds;
 756         int port = dp->index;
 757
 758         if (!ds->ops->port_fdb_dump)
 759                 return -EOPNOTSUPP;
 760
 761         return ds->ops->port_fdb_dump(ds, port, cb, data);
 762 }
 763
 764 int dsa_port_mdb_add(const struct dsa_port *dp,
 765                      const struct switchdev_obj_port_mdb *mdb)
 766 {
 767         struct dsa_notifier_mdb_info info = {
 768                 .sw_index = dp->ds->index,
 769                 .port = dp->index,
 770                 .mdb = mdb,
 771         };
 772
 773         return dsa_port_notify(dp, DSA_NOTIFIER_MDB_ADD, &info);
 774 }
 775
 776 int dsa_port_mdb_del(const struct dsa_port *dp,
 777                      const struct switchdev_obj_port_mdb *mdb)
 778 {
 779         struct dsa_notifier_mdb_info info = {
 780                 .sw_index = dp->ds->index,
 781                 .port = dp->index,
 782                 .mdb = mdb,
 783         };
 784
 785         return dsa_port_notify(dp, DSA_NOTIFIER_MDB_DEL, &info);
 786 }
 787
 788 int dsa_port_host_mdb_add(const struct dsa_port *dp,
 789                           const struct switchdev_obj_port_mdb *mdb)
 790 {
 791         struct dsa_notifier_mdb_info info = {
 792                 .sw_index = dp->ds->index,
 793                 .port = dp->index,
 794                 .mdb = mdb,
 795         };
 796         struct dsa_port *cpu_dp = dp->cpu_dp;
 797         int err;
 798
 799         err = dev_mc_add(cpu_dp->master, mdb->addr);
 800         if (err)
 801                 return err;
 802
 803         return dsa_port_notify(dp, DSA_NOTIFIER_HOST_MDB_ADD, &info);
 804 }
 805
 806 int dsa_port_host_mdb_del(const struct dsa_port *dp,
 807                           const struct switchdev_obj_port_mdb *mdb)
 808 {
 809         struct dsa_notifier_mdb_info info = {
 810                 .sw_index = dp->ds->index,
 811                 .port = dp->index,
 812                 .mdb = mdb,
 813         };
 814         struct dsa_port *cpu_dp = dp->cpu_dp;
 815         int err;
 816
 817         err = dev_mc_del(cpu_dp->master, mdb->addr);
 818         if (err)
 819                 return err;
 820
 821         return dsa_port_notify(dp, DSA_NOTIFIER_HOST_MDB_DEL, &info);
 822 }
 823
 824 int dsa_port_vlan_add(struct dsa_port *dp,
 825                       const struct switchdev_obj_port_vlan *vlan,
 826                       struct netlink_ext_ack *extack)
 827 {
 828         struct dsa_notifier_vlan_info info = {
 829                 .sw_index = dp->ds->index,
 830                 .port = dp->index,
 831                 .vlan = vlan,
 832                 .extack = extack,
 833         };
 834
 835         return dsa_port_notify(dp, DSA_NOTIFIER_VLAN_ADD, &info);
 836 }
 837
 838 int dsa_port_vlan_del(struct dsa_port *dp,
 839                       const struct switchdev_obj_port_vlan *vlan)
 840 {
 841         struct dsa_notifier_vlan_info info = {
 842                 .sw_index = dp->ds->index,
 843                 .port = dp->index,
 844                 .vlan = vlan,
 845         };
 846
 847         return dsa_port_notify(dp, DSA_NOTIFIER_VLAN_DEL, &info);
 848 }
 849
 850 int dsa_port_mrp_add(const struct dsa_port *dp,
 851                      const struct switchdev_obj_mrp *mrp)
 852 {
 853         struct dsa_notifier_mrp_info info = {
 854                 .sw_index = dp->ds->index,
 855                 .port = dp->index,
 856                 .mrp = mrp,
 857         };
 858
 859         return dsa_port_notify(dp, DSA_NOTIFIER_MRP_ADD, &info);
 860 }
 861
 862 int dsa_port_mrp_del(const struct dsa_port *dp,
 863                      const struct switchdev_obj_mrp *mrp)
 864 {
 865         struct dsa_notifier_mrp_info info = {
 866                 .sw_index = dp->ds->index,
 867                 .port = dp->index,
 868                 .mrp = mrp,
 869         };
 870
 871         return dsa_port_notify(dp, DSA_NOTIFIER_MRP_DEL, &info);
 872 }
 873
 874 int dsa_port_mrp_add_ring_role(const struct dsa_port *dp,
 875                                const struct switchdev_obj_ring_role_mrp *mrp)
 876 {
 877         struct dsa_notifier_mrp_ring_role_info info = {
 878                 .sw_index = dp->ds->index,
 879                 .port = dp->index,
 880                 .mrp = mrp,
 881         };
 882
 883         return dsa_port_notify(dp, DSA_NOTIFIER_MRP_ADD_RING_ROLE, &info);
 884 }
 885
 886 int dsa_port_mrp_del_ring_role(const struct dsa_port *dp,
 887                                const struct switchdev_obj_ring_role_mrp *mrp)
 888 {
 889         struct dsa_notifier_mrp_ring_role_info info = {
 890                 .sw_index = dp->ds->index,
 891                 .port = dp->index,
 892                 .mrp = mrp,
 893         };
 894
 895         return dsa_port_notify(dp, DSA_NOTIFIER_MRP_DEL_RING_ROLE, &info);
 896 }
 897
 898 void dsa_port_set_tag_protocol(struct dsa_port *cpu_dp,
 899                                const struct dsa_device_ops *tag_ops)
 900 {
 901         cpu_dp->rcv = tag_ops->rcv;
 902         cpu_dp->tag_ops = tag_ops;
 903 }
 904
 905 static struct phy_device *dsa_port_get_phy_device(struct dsa_port *dp)
 906 {
 907         struct device_node *phy_dn;
 908         struct phy_device *phydev;
 909
 910         phy_dn = of_parse_phandle(dp->dn, "phy-handle", 0);
 911         if (!phy_dn)
 912                 return NULL;
 913
 914         phydev = of_phy_find_device(phy_dn);
 915         if (!phydev) {
 916                 of_node_put(phy_dn);
 917                 return ERR_PTR(-EPROBE_DEFER);
 918         }
 919
 920         of_node_put(phy_dn);
 921         return phydev;
 922 }
 923
 924 static void dsa_port_phylink_validate(struct phylink_config *config,
 925                                       unsigned long *supported,
 926                                       struct phylink_link_state *state)
 927 {
 928         struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
 929         struct dsa_switch *ds = dp->ds;
 930
 931         if (!ds->ops->phylink_validate)
 932                 return;
 933
 934         ds->ops->phylink_validate(ds, dp->index, supported, state);
 935 }
 936
 937 static void dsa_port_phylink_mac_pcs_get_state(struct phylink_config *config,
 938                                                struct phylink_link_state *state)
 939 {
 940         struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
 941         struct dsa_switch *ds = dp->ds;
 942         int err;
 943
 944         /* Only called for inband modes */
 945         if (!ds->ops->phylink_mac_link_state) {
 946                 state->link = 0;
 947                 return;
 948         }
 949
 950         err = ds->ops->phylink_mac_link_state(ds, dp->index, state);
 951         if (err < 0) {
 952                 dev_err(ds->dev, "p%d: phylink_mac_link_state() failed: %d\n",
 953                         dp->index, err);
 954                 state->link = 0;
 955         }
 956 }
 957
 958 static void dsa_port_phylink_mac_config(struct phylink_config *config,
 959                                         unsigned int mode,
 960                                         const struct phylink_link_state *state)
 961 {
 962         struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
 963         struct dsa_switch *ds = dp->ds;
 964
 965         if (!ds->ops->phylink_mac_config)
 966                 return;
 967
 968         ds->ops->phylink_mac_config(ds, dp->index, mode, state);
 969 }
 970
 971 static void dsa_port_phylink_mac_an_restart(struct phylink_config *config)
 972 {
 973         struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
 974         struct dsa_switch *ds = dp->ds;
 975
 976         if (!ds->ops->phylink_mac_an_restart)
 977                 return;
 978
 979         ds->ops->phylink_mac_an_restart(ds, dp->index);
 980 }
 981
 982 static void dsa_port_phylink_mac_link_down(struct phylink_config *config,
 983                                            unsigned int mode,
 984                                            phy_interface_t interface)
 985 {
 986         struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
 987         struct phy_device *phydev = NULL;
 988         struct dsa_switch *ds = dp->ds;
 989
 990         if (dsa_is_user_port(ds, dp->index))
 991                 phydev = dp->slave->phydev;
 992
 993         if (!ds->ops->phylink_mac_link_down) {
 994                 if (ds->ops->adjust_link && phydev)
 995                         ds->ops->adjust_link(ds, dp->index, phydev);
 996                 return;
 997         }
 998
 999         ds->ops->phylink_mac_link_down(ds, dp->index, mode, interface);
1000 }
1001
1002 static void dsa_port_phylink_mac_link_up(struct phylink_config *config,
1003                                          struct phy_device *phydev,
1004                                          unsigned int mode,
1005                                          phy_interface_t interface,
1006                                          int speed, int duplex,
1007                                          bool tx_pause, bool rx_pause)
1008 {
1009         struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
1010         struct dsa_switch *ds = dp->ds;
1011
1012         if (!ds->ops->phylink_mac_link_up) {
1013                 if (ds->ops->adjust_link && phydev)
1014                         ds->ops->adjust_link(ds, dp->index, phydev);
1015                 return;
1016         }
1017
1018         ds->ops->phylink_mac_link_up(ds, dp->index, mode, interface, phydev,
1019                                      speed, duplex, tx_pause, rx_pause);
1020 }
1021
1022 const struct phylink_mac_ops dsa_port_phylink_mac_ops = {
1023         .validate = dsa_port_phylink_validate,
1024         .mac_pcs_get_state = dsa_port_phylink_mac_pcs_get_state,
1025         .mac_config = dsa_port_phylink_mac_config,
1026         .mac_an_restart = dsa_port_phylink_mac_an_restart,
1027         .mac_link_down = dsa_port_phylink_mac_link_down,
1028         .mac_link_up = dsa_port_phylink_mac_link_up,
1029 };
1030
1031 static int dsa_port_setup_phy_of(struct dsa_port *dp, bool enable)
1032 {
1033         struct dsa_switch *ds = dp->ds;
1034         struct phy_device *phydev;
1035         int port = dp->index;
1036         int err = 0;
1037
1038         phydev = dsa_port_get_phy_device(dp);
1039         if (!phydev)
1040                 return 0;
1041
1042         if (IS_ERR(phydev))
1043                 return PTR_ERR(phydev);
1044
1045         if (enable) {
1046                 err = genphy_resume(phydev);
1047                 if (err < 0)
1048                         goto err_put_dev;
1049
1050                 err = genphy_read_status(phydev);
1051                 if (err < 0)
1052                         goto err_put_dev;
1053         } else {
1054                 err = genphy_suspend(phydev);
1055                 if (err < 0)
1056                         goto err_put_dev;
1057         }
1058
1059         if (ds->ops->adjust_link)
1060                 ds->ops->adjust_link(ds, port, phydev);
1061
1062         dev_dbg(ds->dev, "enabled port's phy: %s", phydev_name(phydev));
1063
1064 err_put_dev:
1065         put_device(&phydev->mdio.dev);
1066         return err;
1067 }
1068
1069 static int dsa_port_fixed_link_register_of(struct dsa_port *dp)
1070 {
1071         struct device_node *dn = dp->dn;
1072         struct dsa_switch *ds = dp->ds;
1073         struct phy_device *phydev;
1074         int port = dp->index;
1075         phy_interface_t mode;
1076         int err;
1077
1078         err = of_phy_register_fixed_link(dn);
1079         if (err) {
1080                 dev_err(ds->dev,
1081                         "failed to register the fixed PHY of port %d\n",
1082                         port);
1083                 return err;
1084         }
1085
1086         phydev = of_phy_find_device(dn);
1087
1088         err = of_get_phy_mode(dn, &mode);
1089         if (err)
1090                 mode = PHY_INTERFACE_MODE_NA;
1091         phydev->interface = mode;
1092
1093         genphy_read_status(phydev);
1094
1095         if (ds->ops->adjust_link)
1096                 ds->ops->adjust_link(ds, port, phydev);
1097
1098         put_device(&phydev->mdio.dev);
1099
1100         return 0;
1101 }
1102
1103 static int dsa_port_phylink_register(struct dsa_port *dp)
1104 {
1105         struct dsa_switch *ds = dp->ds;
1106         struct device_node *port_dn = dp->dn;
1107         phy_interface_t mode;
1108         int err;
1109
1110         err = of_get_phy_mode(port_dn, &mode);
1111         if (err)
1112                 mode = PHY_INTERFACE_MODE_NA;
1113
1114         dp->pl_config.dev = ds->dev;
1115         dp->pl_config.type = PHYLINK_DEV;
1116         dp->pl_config.pcs_poll = ds->pcs_poll;
1117
1118         dp->pl = phylink_create(&dp->pl_config, of_fwnode_handle(port_dn),
1119                                 mode, &dsa_port_phylink_mac_ops);
1120         if (IS_ERR(dp->pl)) {
1121                 pr_err("error creating PHYLINK: %ld\n", PTR_ERR(dp->pl));
1122                 return PTR_ERR(dp->pl);
1123         }
1124
1125         err = phylink_of_phy_connect(dp->pl, port_dn, 0);
1126         if (err && err != -ENODEV) {
1127                 pr_err("could not attach to PHY: %d\n", err);
1128                 goto err_phy_connect;
1129         }
1130
1131         return 0;
1132
1133 err_phy_connect:
1134         phylink_destroy(dp->pl);
1135         return err;
1136 }
1137
1138 int dsa_port_link_register_of(struct dsa_port *dp)
1139 {
1140         struct dsa_switch *ds = dp->ds;
1141         struct device_node *phy_np;
1142         int port = dp->index;
1143
1144         if (!ds->ops->adjust_link) {
1145                 phy_np = of_parse_phandle(dp->dn, "phy-handle", 0);
1146                 if (of_phy_is_fixed_link(dp->dn) || phy_np) {
1147                         if (ds->ops->phylink_mac_link_down)
1148                                 ds->ops->phylink_mac_link_down(ds, port,
1149                                         MLO_AN_FIXED, PHY_INTERFACE_MODE_NA);
1150                         return dsa_port_phylink_register(dp);
1151                 }
1152                 return 0;
1153         }
1154
1155         dev_warn(ds->dev,
1156                  "Using legacy PHYLIB callbacks. Please migrate to PHYLINK!\n");
1157
1158         if (of_phy_is_fixed_link(dp->dn))
1159                 return dsa_port_fixed_link_register_of(dp);
1160         else
1161                 return dsa_port_setup_phy_of(dp, true);
1162 }
1163
1164 void dsa_port_link_unregister_of(struct dsa_port *dp)
1165 {
1166         struct dsa_switch *ds = dp->ds;
1167
1168         if (!ds->ops->adjust_link && dp->pl) {
1169                 rtnl_lock();
1170                 phylink_disconnect_phy(dp->pl);
1171                 rtnl_unlock();
1172                 phylink_destroy(dp->pl);
1173                 dp->pl = NULL;
1174                 return;
1175         }
1176
1177         if (of_phy_is_fixed_link(dp->dn))
1178                 of_phy_deregister_fixed_link(dp->dn);
1179         else
1180                 dsa_port_setup_phy_of(dp, false);
1181 }
1182
1183 int dsa_port_get_phy_strings(struct dsa_port *dp, uint8_t *data)
1184 {
1185         struct phy_device *phydev;
1186         int ret = -EOPNOTSUPP;
1187
1188         if (of_phy_is_fixed_link(dp->dn))
1189                 return ret;
1190
1191         phydev = dsa_port_get_phy_device(dp);
1192         if (IS_ERR_OR_NULL(phydev))
1193                 return ret;
1194
1195         ret = phy_ethtool_get_strings(phydev, data);
1196         put_device(&phydev->mdio.dev);
1197
1198         return ret;
1199 }
1200 EXPORT_SYMBOL_GPL(dsa_port_get_phy_strings);
1201
1202 int dsa_port_get_ethtool_phy_stats(struct dsa_port *dp, uint64_t *data)
1203 {
1204         struct phy_device *phydev;
1205         int ret = -EOPNOTSUPP;
1206
1207         if (of_phy_is_fixed_link(dp->dn))
1208                 return ret;
1209
1210         phydev = dsa_port_get_phy_device(dp);
1211         if (IS_ERR_OR_NULL(phydev))
1212                 return ret;
1213
1214         ret = phy_ethtool_get_stats(phydev, NULL, data);
1215         put_device(&phydev->mdio.dev);
1216
1217         return ret;
1218 }
1219 EXPORT_SYMBOL_GPL(dsa_port_get_ethtool_phy_stats);
1220
1221 int dsa_port_get_phy_sset_count(struct dsa_port *dp)
1222 {
1223         struct phy_device *phydev;
1224         int ret = -EOPNOTSUPP;
1225
1226         if (of_phy_is_fixed_link(dp->dn))
1227                 return ret;
1228
1229         phydev = dsa_port_get_phy_device(dp);
1230         if (IS_ERR_OR_NULL(phydev))
1231                 return ret;
1232
1233         ret = phy_ethtool_get_sset_count(phydev);
1234         put_device(&phydev->mdio.dev);
1235
1236         return ret;
1237 }
1238 EXPORT_SYMBOL_GPL(dsa_port_get_phy_sset_count);
1239
1240 int dsa_port_hsr_join(struct dsa_port *dp, struct net_device *hsr)
1241 {
1242         struct dsa_notifier_hsr_info info = {
1243                 .sw_index = dp->ds->index,
1244                 .port = dp->index,
1245                 .hsr = hsr,
1246         };
1247         int err;
1248
1249         dp->hsr_dev = hsr;
1250
1251         err = dsa_port_notify(dp, DSA_NOTIFIER_HSR_JOIN, &info);
1252         if (err)
1253                 dp->hsr_dev = NULL;
1254
1255         return err;
1256 }
1257
1258 void dsa_port_hsr_leave(struct dsa_port *dp, struct net_device *hsr)
1259 {
1260         struct dsa_notifier_hsr_info info = {
1261                 .sw_index = dp->ds->index,
1262                 .port = dp->index,
1263                 .hsr = hsr,
1264         };
1265         int err;
1266
1267         dp->hsr_dev = NULL;
1268
1269         err = dsa_port_notify(dp, DSA_NOTIFIER_HSR_LEAVE, &info);
1270         if (err)
1271                 pr_err("DSA: failed to notify DSA_NOTIFIER_HSR_LEAVE\n");
1272 }
1273
1274 int dsa_port_tag_8021q_vlan_add(struct dsa_port *dp, u16 vid)
1275 {
1276         struct dsa_notifier_tag_8021q_vlan_info info = {
1277                 .tree_index = dp->ds->dst->index,
1278                 .sw_index = dp->ds->index,
1279                 .port = dp->index,
1280                 .vid = vid,
1281         };
1282
1283         return dsa_broadcast(DSA_NOTIFIER_TAG_8021Q_VLAN_ADD, &info);
1284 }
1285
1286 void dsa_port_tag_8021q_vlan_del(struct dsa_port *dp, u16 vid)
1287 {
1288         struct dsa_notifier_tag_8021q_vlan_info info = {
1289                 .tree_index = dp->ds->dst->index,
1290                 .sw_index = dp->ds->index,
1291                 .port = dp->index,
1292                 .vid = vid,
1293         };
1294         int err;
1295
1296         err = dsa_broadcast(DSA_NOTIFIER_TAG_8021Q_VLAN_DEL, &info);
1297         if (err)
1298                 pr_err("DSA: failed to notify tag_8021q VLAN deletion: %pe\n",
1299                        ERR_PTR(err));
1300 }