1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Handling of a single switch port
5 * Copyright (c) 2017 Savoir-faire Linux Inc.
6 * Vivien Didelot <vivien.didelot@savoirfairelinux.com>
9 #include <linux/if_bridge.h>
10 #include <linux/notifier.h>
11 #include <linux/of_mdio.h>
12 #include <linux/of_net.h>
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.
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.
28 static int dsa_port_notify(const struct dsa_port *dp, unsigned long e, void *v)
30 return dsa_tree_notify(dp->ds->dst, e, v);
33 static void dsa_port_notify_bridge_fdb_flush(const struct dsa_port *dp, u16 vid)
35 struct net_device *brport_dev = dsa_port_to_bridge_port(dp);
36 struct switchdev_notifier_fdb_info info = {
40 /* When the port becomes standalone it has already left the bridge.
41 * Don't notify the bridge in that case.
46 call_switchdev_notifiers(SWITCHDEV_FDB_FLUSH_TO_BRIDGE,
47 brport_dev, &info.info, NULL);
50 static void dsa_port_fast_age(const struct dsa_port *dp)
52 struct dsa_switch *ds = dp->ds;
54 if (!ds->ops->port_fast_age)
57 ds->ops->port_fast_age(ds, dp->index);
60 dsa_port_notify_bridge_fdb_flush(dp, 0);
63 static int dsa_port_vlan_fast_age(const struct dsa_port *dp, u16 vid)
65 struct dsa_switch *ds = dp->ds;
68 if (!ds->ops->port_vlan_fast_age)
71 err = ds->ops->port_vlan_fast_age(ds, dp->index, vid);
74 dsa_port_notify_bridge_fdb_flush(dp, vid);
79 static int dsa_port_msti_fast_age(const struct dsa_port *dp, u16 msti)
81 DECLARE_BITMAP(vids, VLAN_N_VID) = { 0 };
84 err = br_mst_get_info(dsa_port_bridge_dev_get(dp), msti, vids);
88 for_each_set_bit(vid, vids, VLAN_N_VID) {
89 err = dsa_port_vlan_fast_age(dp, vid);
97 static bool dsa_port_can_configure_learning(struct dsa_port *dp)
99 struct switchdev_brport_flags flags = {
102 struct dsa_switch *ds = dp->ds;
105 if (!ds->ops->port_bridge_flags || !ds->ops->port_pre_bridge_flags)
108 err = ds->ops->port_pre_bridge_flags(ds, dp->index, flags, NULL);
112 int dsa_port_set_state(struct dsa_port *dp, u8 state, bool do_fast_age)
114 struct dsa_switch *ds = dp->ds;
115 int port = dp->index;
117 if (!ds->ops->port_stp_state_set)
120 ds->ops->port_stp_state_set(ds, port, state);
122 if (!dsa_port_can_configure_learning(dp) ||
123 (do_fast_age && dp->learning)) {
124 /* Fast age FDB entries or flush appropriate forwarding database
125 * for the given port, if we are moving it from Learning or
126 * Forwarding state, to Disabled or Blocking or Listening state.
127 * Ports that were standalone before the STP state change don't
128 * need to fast age the FDB, since address learning is off in
132 if ((dp->stp_state == BR_STATE_LEARNING ||
133 dp->stp_state == BR_STATE_FORWARDING) &&
134 (state == BR_STATE_DISABLED ||
135 state == BR_STATE_BLOCKING ||
136 state == BR_STATE_LISTENING))
137 dsa_port_fast_age(dp);
140 dp->stp_state = state;
145 static void dsa_port_set_state_now(struct dsa_port *dp, u8 state,
150 err = dsa_port_set_state(dp, state, do_fast_age);
152 pr_err("DSA: failed to set STP state %u (%d)\n", state, err);
155 int dsa_port_set_mst_state(struct dsa_port *dp,
156 const struct switchdev_mst_state *state,
157 struct netlink_ext_ack *extack)
159 struct dsa_switch *ds = dp->ds;
163 if (!ds->ops->port_mst_state_set)
166 err = br_mst_get_state(dsa_port_to_bridge_port(dp), state->msti,
171 err = ds->ops->port_mst_state_set(ds, dp->index, state);
175 if (!(dp->learning &&
176 (prev_state == BR_STATE_LEARNING ||
177 prev_state == BR_STATE_FORWARDING) &&
178 (state->state == BR_STATE_DISABLED ||
179 state->state == BR_STATE_BLOCKING ||
180 state->state == BR_STATE_LISTENING)))
183 err = dsa_port_msti_fast_age(dp, state->msti);
185 NL_SET_ERR_MSG_MOD(extack,
186 "Unable to flush associated VLANs");
191 int dsa_port_enable_rt(struct dsa_port *dp, struct phy_device *phy)
193 struct dsa_switch *ds = dp->ds;
194 int port = dp->index;
197 if (ds->ops->port_enable) {
198 err = ds->ops->port_enable(ds, port, phy);
204 dsa_port_set_state_now(dp, BR_STATE_FORWARDING, false);
207 phylink_start(dp->pl);
212 int dsa_port_enable(struct dsa_port *dp, struct phy_device *phy)
217 err = dsa_port_enable_rt(dp, phy);
223 void dsa_port_disable_rt(struct dsa_port *dp)
225 struct dsa_switch *ds = dp->ds;
226 int port = dp->index;
229 phylink_stop(dp->pl);
232 dsa_port_set_state_now(dp, BR_STATE_DISABLED, false);
234 if (ds->ops->port_disable)
235 ds->ops->port_disable(ds, port);
238 void dsa_port_disable(struct dsa_port *dp)
241 dsa_port_disable_rt(dp);
245 static void dsa_port_reset_vlan_filtering(struct dsa_port *dp,
246 struct dsa_bridge bridge)
248 struct netlink_ext_ack extack = {0};
249 bool change_vlan_filtering = false;
250 struct dsa_switch *ds = dp->ds;
251 struct dsa_port *other_dp;
255 if (ds->needs_standalone_vlan_filtering &&
256 !br_vlan_enabled(bridge.dev)) {
257 change_vlan_filtering = true;
258 vlan_filtering = true;
259 } else if (!ds->needs_standalone_vlan_filtering &&
260 br_vlan_enabled(bridge.dev)) {
261 change_vlan_filtering = true;
262 vlan_filtering = false;
265 /* If the bridge was vlan_filtering, the bridge core doesn't trigger an
266 * event for changing vlan_filtering setting upon slave ports leaving
267 * it. That is a good thing, because that lets us handle it and also
268 * handle the case where the switch's vlan_filtering setting is global
269 * (not per port). When that happens, the correct moment to trigger the
270 * vlan_filtering callback is only when the last port leaves the last
273 if (change_vlan_filtering && ds->vlan_filtering_is_global) {
274 dsa_switch_for_each_port(other_dp, ds) {
275 struct net_device *br = dsa_port_bridge_dev_get(other_dp);
277 if (br && br_vlan_enabled(br)) {
278 change_vlan_filtering = false;
284 if (!change_vlan_filtering)
287 err = dsa_port_vlan_filtering(dp, vlan_filtering, &extack);
289 dev_err(ds->dev, "port %d: %s\n", dp->index,
292 if (err && err != -EOPNOTSUPP) {
294 "port %d failed to reset VLAN filtering to %d: %pe\n",
295 dp->index, vlan_filtering, ERR_PTR(err));
299 static int dsa_port_inherit_brport_flags(struct dsa_port *dp,
300 struct netlink_ext_ack *extack)
302 const unsigned long mask = BR_LEARNING | BR_FLOOD | BR_MCAST_FLOOD |
303 BR_BCAST_FLOOD | BR_PORT_LOCKED;
304 struct net_device *brport_dev = dsa_port_to_bridge_port(dp);
307 for_each_set_bit(flag, &mask, 32) {
308 struct switchdev_brport_flags flags = {0};
310 flags.mask = BIT(flag);
312 if (br_port_flag_is_set(brport_dev, BIT(flag)))
313 flags.val = BIT(flag);
315 err = dsa_port_bridge_flags(dp, flags, extack);
316 if (err && err != -EOPNOTSUPP)
323 static void dsa_port_clear_brport_flags(struct dsa_port *dp)
325 const unsigned long val = BR_FLOOD | BR_MCAST_FLOOD | BR_BCAST_FLOOD;
326 const unsigned long mask = BR_LEARNING | BR_FLOOD | BR_MCAST_FLOOD |
327 BR_BCAST_FLOOD | BR_PORT_LOCKED;
330 for_each_set_bit(flag, &mask, 32) {
331 struct switchdev_brport_flags flags = {0};
333 flags.mask = BIT(flag);
334 flags.val = val & BIT(flag);
336 err = dsa_port_bridge_flags(dp, flags, NULL);
337 if (err && err != -EOPNOTSUPP)
339 "failed to clear bridge port flag %lu: %pe\n",
340 flags.val, ERR_PTR(err));
344 static int dsa_port_switchdev_sync_attrs(struct dsa_port *dp,
345 struct netlink_ext_ack *extack)
347 struct net_device *brport_dev = dsa_port_to_bridge_port(dp);
348 struct net_device *br = dsa_port_bridge_dev_get(dp);
351 err = dsa_port_inherit_brport_flags(dp, extack);
355 err = dsa_port_set_state(dp, br_port_get_stp_state(brport_dev), false);
356 if (err && err != -EOPNOTSUPP)
359 err = dsa_port_vlan_filtering(dp, br_vlan_enabled(br), extack);
360 if (err && err != -EOPNOTSUPP)
363 err = dsa_port_ageing_time(dp, br_get_ageing_time(br));
364 if (err && err != -EOPNOTSUPP)
370 static void dsa_port_switchdev_unsync_attrs(struct dsa_port *dp,
371 struct dsa_bridge bridge)
373 /* Configure the port for standalone mode (no address learning,
375 * The bridge only emits SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS events
376 * when the user requests it through netlink or sysfs, but not
377 * automatically at port join or leave, so we need to handle resetting
378 * the brport flags ourselves. But we even prefer it that way, because
379 * otherwise, some setups might never get the notification they need,
380 * for example, when a port leaves a LAG that offloads the bridge,
381 * it becomes standalone, but as far as the bridge is concerned, no
384 dsa_port_clear_brport_flags(dp);
386 /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
387 * so allow it to be in BR_STATE_FORWARDING to be kept functional
389 dsa_port_set_state_now(dp, BR_STATE_FORWARDING, true);
391 dsa_port_reset_vlan_filtering(dp, bridge);
393 /* Ageing time may be global to the switch chip, so don't change it
394 * here because we have no good reason (or value) to change it to.
398 static int dsa_port_bridge_create(struct dsa_port *dp,
399 struct net_device *br,
400 struct netlink_ext_ack *extack)
402 struct dsa_switch *ds = dp->ds;
403 struct dsa_bridge *bridge;
405 bridge = dsa_tree_bridge_find(ds->dst, br);
407 refcount_inc(&bridge->refcount);
412 bridge = kzalloc(sizeof(*bridge), GFP_KERNEL);
416 refcount_set(&bridge->refcount, 1);
420 bridge->num = dsa_bridge_num_get(br, ds->max_num_bridges);
421 if (ds->max_num_bridges && !bridge->num) {
422 NL_SET_ERR_MSG_MOD(extack,
423 "Range of offloadable bridges exceeded");
433 static void dsa_port_bridge_destroy(struct dsa_port *dp,
434 const struct net_device *br)
436 struct dsa_bridge *bridge = dp->bridge;
440 if (!refcount_dec_and_test(&bridge->refcount))
444 dsa_bridge_num_put(br, bridge->num);
449 static bool dsa_port_supports_mst(struct dsa_port *dp)
451 struct dsa_switch *ds = dp->ds;
453 return ds->ops->vlan_msti_set &&
454 ds->ops->port_mst_state_set &&
455 ds->ops->port_vlan_fast_age &&
456 dsa_port_can_configure_learning(dp);
459 int dsa_port_bridge_join(struct dsa_port *dp, struct net_device *br,
460 struct netlink_ext_ack *extack)
462 struct dsa_notifier_bridge_info info = {
466 struct net_device *dev = dp->slave;
467 struct net_device *brport_dev;
470 if (br_mst_enabled(br) && !dsa_port_supports_mst(dp))
473 /* Here the interface is already bridged. Reflect the current
474 * configuration so that drivers can program their chips accordingly.
476 err = dsa_port_bridge_create(dp, br, extack);
480 brport_dev = dsa_port_to_bridge_port(dp);
482 info.bridge = *dp->bridge;
483 err = dsa_broadcast(DSA_NOTIFIER_BRIDGE_JOIN, &info);
487 /* Drivers which support bridge TX forwarding should set this */
488 dp->bridge->tx_fwd_offload = info.tx_fwd_offload;
490 err = switchdev_bridge_port_offload(brport_dev, dev, dp,
491 &dsa_slave_switchdev_notifier,
492 &dsa_slave_switchdev_blocking_notifier,
493 dp->bridge->tx_fwd_offload, extack);
495 goto out_rollback_unbridge;
497 err = dsa_port_switchdev_sync_attrs(dp, extack);
499 goto out_rollback_unoffload;
503 out_rollback_unoffload:
504 switchdev_bridge_port_unoffload(brport_dev, dp,
505 &dsa_slave_switchdev_notifier,
506 &dsa_slave_switchdev_blocking_notifier);
507 dsa_flush_workqueue();
508 out_rollback_unbridge:
509 dsa_broadcast(DSA_NOTIFIER_BRIDGE_LEAVE, &info);
511 dsa_port_bridge_destroy(dp, br);
515 void dsa_port_pre_bridge_leave(struct dsa_port *dp, struct net_device *br)
517 struct net_device *brport_dev = dsa_port_to_bridge_port(dp);
519 /* Don't try to unoffload something that is not offloaded */
523 switchdev_bridge_port_unoffload(brport_dev, dp,
524 &dsa_slave_switchdev_notifier,
525 &dsa_slave_switchdev_blocking_notifier);
527 dsa_flush_workqueue();
530 void dsa_port_bridge_leave(struct dsa_port *dp, struct net_device *br)
532 struct dsa_notifier_bridge_info info = {
537 /* If the port could not be offloaded to begin with, then
538 * there is nothing to do.
543 info.bridge = *dp->bridge;
545 /* Here the port is already unbridged. Reflect the current configuration
546 * so that drivers can program their chips accordingly.
548 dsa_port_bridge_destroy(dp, br);
550 err = dsa_broadcast(DSA_NOTIFIER_BRIDGE_LEAVE, &info);
553 "port %d failed to notify DSA_NOTIFIER_BRIDGE_LEAVE: %pe\n",
554 dp->index, ERR_PTR(err));
556 dsa_port_switchdev_unsync_attrs(dp, info.bridge);
559 int dsa_port_lag_change(struct dsa_port *dp,
560 struct netdev_lag_lower_state_info *linfo)
562 struct dsa_notifier_lag_info info = {
570 /* On statically configured aggregates (e.g. loadbalance
571 * without LACP) ports will always be tx_enabled, even if the
572 * link is down. Thus we require both link_up and tx_enabled
573 * in order to include it in the tx set.
575 tx_enabled = linfo->link_up && linfo->tx_enabled;
577 if (tx_enabled == dp->lag_tx_enabled)
580 dp->lag_tx_enabled = tx_enabled;
582 return dsa_port_notify(dp, DSA_NOTIFIER_LAG_CHANGE, &info);
585 static int dsa_port_lag_create(struct dsa_port *dp,
586 struct net_device *lag_dev)
588 struct dsa_switch *ds = dp->ds;
591 lag = dsa_tree_lag_find(ds->dst, lag_dev);
593 refcount_inc(&lag->refcount);
598 lag = kzalloc(sizeof(*lag), GFP_KERNEL);
602 refcount_set(&lag->refcount, 1);
603 mutex_init(&lag->fdb_lock);
604 INIT_LIST_HEAD(&lag->fdbs);
606 dsa_lag_map(ds->dst, lag);
612 static void dsa_port_lag_destroy(struct dsa_port *dp)
614 struct dsa_lag *lag = dp->lag;
617 dp->lag_tx_enabled = false;
619 if (!refcount_dec_and_test(&lag->refcount))
622 WARN_ON(!list_empty(&lag->fdbs));
623 dsa_lag_unmap(dp->ds->dst, lag);
627 int dsa_port_lag_join(struct dsa_port *dp, struct net_device *lag_dev,
628 struct netdev_lag_upper_info *uinfo,
629 struct netlink_ext_ack *extack)
631 struct dsa_notifier_lag_info info = {
635 struct net_device *bridge_dev;
638 err = dsa_port_lag_create(dp, lag_dev);
643 err = dsa_port_notify(dp, DSA_NOTIFIER_LAG_JOIN, &info);
647 bridge_dev = netdev_master_upper_dev_get(lag_dev);
648 if (!bridge_dev || !netif_is_bridge_master(bridge_dev))
651 err = dsa_port_bridge_join(dp, bridge_dev, extack);
653 goto err_bridge_join;
658 dsa_port_notify(dp, DSA_NOTIFIER_LAG_LEAVE, &info);
660 dsa_port_lag_destroy(dp);
665 void dsa_port_pre_lag_leave(struct dsa_port *dp, struct net_device *lag_dev)
667 struct net_device *br = dsa_port_bridge_dev_get(dp);
670 dsa_port_pre_bridge_leave(dp, br);
673 void dsa_port_lag_leave(struct dsa_port *dp, struct net_device *lag_dev)
675 struct net_device *br = dsa_port_bridge_dev_get(dp);
676 struct dsa_notifier_lag_info info = {
684 /* Port might have been part of a LAG that in turn was
685 * attached to a bridge.
688 dsa_port_bridge_leave(dp, br);
692 dsa_port_lag_destroy(dp);
694 err = dsa_port_notify(dp, DSA_NOTIFIER_LAG_LEAVE, &info);
697 "port %d failed to notify DSA_NOTIFIER_LAG_LEAVE: %pe\n",
698 dp->index, ERR_PTR(err));
701 /* Must be called under rcu_read_lock() */
702 static bool dsa_port_can_apply_vlan_filtering(struct dsa_port *dp,
704 struct netlink_ext_ack *extack)
706 struct dsa_switch *ds = dp->ds;
707 struct dsa_port *other_dp;
710 /* VLAN awareness was off, so the question is "can we turn it on".
711 * We may have had 8021q uppers, those need to go. Make sure we don't
712 * enter an inconsistent state: deny changing the VLAN awareness state
713 * as long as we have 8021q uppers.
715 if (vlan_filtering && dsa_port_is_user(dp)) {
716 struct net_device *br = dsa_port_bridge_dev_get(dp);
717 struct net_device *upper_dev, *slave = dp->slave;
718 struct list_head *iter;
720 netdev_for_each_upper_dev_rcu(slave, upper_dev, iter) {
721 struct bridge_vlan_info br_info;
724 if (!is_vlan_dev(upper_dev))
727 vid = vlan_dev_vlan_id(upper_dev);
729 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the
730 * device, respectively the VID is not found, returning
731 * 0 means success, which is a failure for us here.
733 err = br_vlan_get_info(br, vid, &br_info);
735 NL_SET_ERR_MSG_MOD(extack,
736 "Must first remove VLAN uppers having VIDs also present in bridge");
742 if (!ds->vlan_filtering_is_global)
745 /* For cases where enabling/disabling VLAN awareness is global to the
746 * switch, we need to handle the case where multiple bridges span
747 * different ports of the same switch device and one of them has a
748 * different setting than what is being requested.
750 dsa_switch_for_each_port(other_dp, ds) {
751 struct net_device *other_br = dsa_port_bridge_dev_get(other_dp);
753 /* If it's the same bridge, it also has same
754 * vlan_filtering setting => no need to check
756 if (!other_br || other_br == dsa_port_bridge_dev_get(dp))
759 if (br_vlan_enabled(other_br) != vlan_filtering) {
760 NL_SET_ERR_MSG_MOD(extack,
761 "VLAN filtering is a global setting");
768 int dsa_port_vlan_filtering(struct dsa_port *dp, bool vlan_filtering,
769 struct netlink_ext_ack *extack)
771 bool old_vlan_filtering = dsa_port_is_vlan_filtering(dp);
772 struct dsa_switch *ds = dp->ds;
776 if (!ds->ops->port_vlan_filtering)
779 /* We are called from dsa_slave_switchdev_blocking_event(),
780 * which is not under rcu_read_lock(), unlike
781 * dsa_slave_switchdev_event().
784 apply = dsa_port_can_apply_vlan_filtering(dp, vlan_filtering, extack);
789 if (dsa_port_is_vlan_filtering(dp) == vlan_filtering)
792 err = ds->ops->port_vlan_filtering(ds, dp->index, vlan_filtering,
797 if (ds->vlan_filtering_is_global) {
798 struct dsa_port *other_dp;
800 ds->vlan_filtering = vlan_filtering;
802 dsa_switch_for_each_user_port(other_dp, ds) {
803 struct net_device *slave = other_dp->slave;
805 /* We might be called in the unbind path, so not
806 * all slave devices might still be registered.
811 err = dsa_slave_manage_vlan_filtering(slave,
817 dp->vlan_filtering = vlan_filtering;
819 err = dsa_slave_manage_vlan_filtering(dp->slave,
828 ds->ops->port_vlan_filtering(ds, dp->index, old_vlan_filtering, NULL);
830 if (ds->vlan_filtering_is_global)
831 ds->vlan_filtering = old_vlan_filtering;
833 dp->vlan_filtering = old_vlan_filtering;
838 /* This enforces legacy behavior for switch drivers which assume they can't
839 * receive VLAN configuration when enslaved to a bridge with vlan_filtering=0
841 bool dsa_port_skip_vlan_configuration(struct dsa_port *dp)
843 struct net_device *br = dsa_port_bridge_dev_get(dp);
844 struct dsa_switch *ds = dp->ds;
849 return !ds->configure_vlan_while_not_filtering && !br_vlan_enabled(br);
852 int dsa_port_ageing_time(struct dsa_port *dp, clock_t ageing_clock)
854 unsigned long ageing_jiffies = clock_t_to_jiffies(ageing_clock);
855 unsigned int ageing_time = jiffies_to_msecs(ageing_jiffies);
856 struct dsa_notifier_ageing_time_info info;
859 info.ageing_time = ageing_time;
861 err = dsa_port_notify(dp, DSA_NOTIFIER_AGEING_TIME, &info);
865 dp->ageing_time = ageing_time;
870 int dsa_port_mst_enable(struct dsa_port *dp, bool on,
871 struct netlink_ext_ack *extack)
873 if (on && !dsa_port_supports_mst(dp)) {
874 NL_SET_ERR_MSG_MOD(extack, "Hardware does not support MST");
881 int dsa_port_pre_bridge_flags(const struct dsa_port *dp,
882 struct switchdev_brport_flags flags,
883 struct netlink_ext_ack *extack)
885 struct dsa_switch *ds = dp->ds;
887 if (!ds->ops->port_pre_bridge_flags)
890 return ds->ops->port_pre_bridge_flags(ds, dp->index, flags, extack);
893 int dsa_port_bridge_flags(struct dsa_port *dp,
894 struct switchdev_brport_flags flags,
895 struct netlink_ext_ack *extack)
897 struct dsa_switch *ds = dp->ds;
900 if (!ds->ops->port_bridge_flags)
903 err = ds->ops->port_bridge_flags(ds, dp->index, flags, extack);
907 if (flags.mask & BR_LEARNING) {
908 bool learning = flags.val & BR_LEARNING;
910 if (learning == dp->learning)
913 if ((dp->learning && !learning) &&
914 (dp->stp_state == BR_STATE_LEARNING ||
915 dp->stp_state == BR_STATE_FORWARDING))
916 dsa_port_fast_age(dp);
918 dp->learning = learning;
924 void dsa_port_set_host_flood(struct dsa_port *dp, bool uc, bool mc)
926 struct dsa_switch *ds = dp->ds;
928 if (ds->ops->port_set_host_flood)
929 ds->ops->port_set_host_flood(ds, dp->index, uc, mc);
932 int dsa_port_vlan_msti(struct dsa_port *dp,
933 const struct switchdev_vlan_msti *msti)
935 struct dsa_switch *ds = dp->ds;
937 if (!ds->ops->vlan_msti_set)
940 return ds->ops->vlan_msti_set(ds, *dp->bridge, msti);
943 int dsa_port_mtu_change(struct dsa_port *dp, int new_mtu)
945 struct dsa_notifier_mtu_info info = {
950 return dsa_port_notify(dp, DSA_NOTIFIER_MTU, &info);
953 int dsa_port_fdb_add(struct dsa_port *dp, const unsigned char *addr,
956 struct dsa_notifier_fdb_info info = {
961 .type = DSA_DB_BRIDGE,
962 .bridge = *dp->bridge,
966 /* Refcounting takes bridge.num as a key, and should be global for all
967 * bridges in the absence of FDB isolation, and per bridge otherwise.
968 * Force the bridge.num to zero here in the absence of FDB isolation.
970 if (!dp->ds->fdb_isolation)
971 info.db.bridge.num = 0;
973 return dsa_port_notify(dp, DSA_NOTIFIER_FDB_ADD, &info);
976 int dsa_port_fdb_del(struct dsa_port *dp, const unsigned char *addr,
979 struct dsa_notifier_fdb_info info = {
984 .type = DSA_DB_BRIDGE,
985 .bridge = *dp->bridge,
989 if (!dp->ds->fdb_isolation)
990 info.db.bridge.num = 0;
992 return dsa_port_notify(dp, DSA_NOTIFIER_FDB_DEL, &info);
995 static int dsa_port_host_fdb_add(struct dsa_port *dp,
996 const unsigned char *addr, u16 vid,
999 struct dsa_notifier_fdb_info info = {
1006 if (!dp->ds->fdb_isolation)
1007 info.db.bridge.num = 0;
1009 return dsa_port_notify(dp, DSA_NOTIFIER_HOST_FDB_ADD, &info);
1012 int dsa_port_standalone_host_fdb_add(struct dsa_port *dp,
1013 const unsigned char *addr, u16 vid)
1015 struct dsa_db db = {
1016 .type = DSA_DB_PORT,
1020 return dsa_port_host_fdb_add(dp, addr, vid, db);
1023 int dsa_port_bridge_host_fdb_add(struct dsa_port *dp,
1024 const unsigned char *addr, u16 vid)
1026 struct dsa_port *cpu_dp = dp->cpu_dp;
1027 struct dsa_db db = {
1028 .type = DSA_DB_BRIDGE,
1029 .bridge = *dp->bridge,
1033 /* Avoid a call to __dev_set_promiscuity() on the master, which
1034 * requires rtnl_lock(), since we can't guarantee that is held here,
1035 * and we can't take it either.
1037 if (cpu_dp->master->priv_flags & IFF_UNICAST_FLT) {
1038 err = dev_uc_add(cpu_dp->master, addr);
1043 return dsa_port_host_fdb_add(dp, addr, vid, db);
1046 static int dsa_port_host_fdb_del(struct dsa_port *dp,
1047 const unsigned char *addr, u16 vid,
1050 struct dsa_notifier_fdb_info info = {
1057 if (!dp->ds->fdb_isolation)
1058 info.db.bridge.num = 0;
1060 return dsa_port_notify(dp, DSA_NOTIFIER_HOST_FDB_DEL, &info);
1063 int dsa_port_standalone_host_fdb_del(struct dsa_port *dp,
1064 const unsigned char *addr, u16 vid)
1066 struct dsa_db db = {
1067 .type = DSA_DB_PORT,
1071 return dsa_port_host_fdb_del(dp, addr, vid, db);
1074 int dsa_port_bridge_host_fdb_del(struct dsa_port *dp,
1075 const unsigned char *addr, u16 vid)
1077 struct dsa_port *cpu_dp = dp->cpu_dp;
1078 struct dsa_db db = {
1079 .type = DSA_DB_BRIDGE,
1080 .bridge = *dp->bridge,
1084 if (cpu_dp->master->priv_flags & IFF_UNICAST_FLT) {
1085 err = dev_uc_del(cpu_dp->master, addr);
1090 return dsa_port_host_fdb_del(dp, addr, vid, db);
1093 int dsa_port_lag_fdb_add(struct dsa_port *dp, const unsigned char *addr,
1096 struct dsa_notifier_lag_fdb_info info = {
1101 .type = DSA_DB_BRIDGE,
1102 .bridge = *dp->bridge,
1106 if (!dp->ds->fdb_isolation)
1107 info.db.bridge.num = 0;
1109 return dsa_port_notify(dp, DSA_NOTIFIER_LAG_FDB_ADD, &info);
1112 int dsa_port_lag_fdb_del(struct dsa_port *dp, const unsigned char *addr,
1115 struct dsa_notifier_lag_fdb_info info = {
1120 .type = DSA_DB_BRIDGE,
1121 .bridge = *dp->bridge,
1125 if (!dp->ds->fdb_isolation)
1126 info.db.bridge.num = 0;
1128 return dsa_port_notify(dp, DSA_NOTIFIER_LAG_FDB_DEL, &info);
1131 int dsa_port_fdb_dump(struct dsa_port *dp, dsa_fdb_dump_cb_t *cb, void *data)
1133 struct dsa_switch *ds = dp->ds;
1134 int port = dp->index;
1136 if (!ds->ops->port_fdb_dump)
1139 return ds->ops->port_fdb_dump(ds, port, cb, data);
1142 int dsa_port_mdb_add(const struct dsa_port *dp,
1143 const struct switchdev_obj_port_mdb *mdb)
1145 struct dsa_notifier_mdb_info info = {
1149 .type = DSA_DB_BRIDGE,
1150 .bridge = *dp->bridge,
1154 if (!dp->ds->fdb_isolation)
1155 info.db.bridge.num = 0;
1157 return dsa_port_notify(dp, DSA_NOTIFIER_MDB_ADD, &info);
1160 int dsa_port_mdb_del(const struct dsa_port *dp,
1161 const struct switchdev_obj_port_mdb *mdb)
1163 struct dsa_notifier_mdb_info info = {
1167 .type = DSA_DB_BRIDGE,
1168 .bridge = *dp->bridge,
1172 if (!dp->ds->fdb_isolation)
1173 info.db.bridge.num = 0;
1175 return dsa_port_notify(dp, DSA_NOTIFIER_MDB_DEL, &info);
1178 static int dsa_port_host_mdb_add(const struct dsa_port *dp,
1179 const struct switchdev_obj_port_mdb *mdb,
1182 struct dsa_notifier_mdb_info info = {
1188 if (!dp->ds->fdb_isolation)
1189 info.db.bridge.num = 0;
1191 return dsa_port_notify(dp, DSA_NOTIFIER_HOST_MDB_ADD, &info);
1194 int dsa_port_standalone_host_mdb_add(const struct dsa_port *dp,
1195 const struct switchdev_obj_port_mdb *mdb)
1197 struct dsa_db db = {
1198 .type = DSA_DB_PORT,
1202 return dsa_port_host_mdb_add(dp, mdb, db);
1205 int dsa_port_bridge_host_mdb_add(const struct dsa_port *dp,
1206 const struct switchdev_obj_port_mdb *mdb)
1208 struct dsa_port *cpu_dp = dp->cpu_dp;
1209 struct dsa_db db = {
1210 .type = DSA_DB_BRIDGE,
1211 .bridge = *dp->bridge,
1215 err = dev_mc_add(cpu_dp->master, mdb->addr);
1219 return dsa_port_host_mdb_add(dp, mdb, db);
1222 static int dsa_port_host_mdb_del(const struct dsa_port *dp,
1223 const struct switchdev_obj_port_mdb *mdb,
1226 struct dsa_notifier_mdb_info info = {
1232 if (!dp->ds->fdb_isolation)
1233 info.db.bridge.num = 0;
1235 return dsa_port_notify(dp, DSA_NOTIFIER_HOST_MDB_DEL, &info);
1238 int dsa_port_standalone_host_mdb_del(const struct dsa_port *dp,
1239 const struct switchdev_obj_port_mdb *mdb)
1241 struct dsa_db db = {
1242 .type = DSA_DB_PORT,
1246 return dsa_port_host_mdb_del(dp, mdb, db);
1249 int dsa_port_bridge_host_mdb_del(const struct dsa_port *dp,
1250 const struct switchdev_obj_port_mdb *mdb)
1252 struct dsa_port *cpu_dp = dp->cpu_dp;
1253 struct dsa_db db = {
1254 .type = DSA_DB_BRIDGE,
1255 .bridge = *dp->bridge,
1259 err = dev_mc_del(cpu_dp->master, mdb->addr);
1263 return dsa_port_host_mdb_del(dp, mdb, db);
1266 int dsa_port_vlan_add(struct dsa_port *dp,
1267 const struct switchdev_obj_port_vlan *vlan,
1268 struct netlink_ext_ack *extack)
1270 struct dsa_notifier_vlan_info info = {
1276 return dsa_port_notify(dp, DSA_NOTIFIER_VLAN_ADD, &info);
1279 int dsa_port_vlan_del(struct dsa_port *dp,
1280 const struct switchdev_obj_port_vlan *vlan)
1282 struct dsa_notifier_vlan_info info = {
1287 return dsa_port_notify(dp, DSA_NOTIFIER_VLAN_DEL, &info);
1290 int dsa_port_host_vlan_add(struct dsa_port *dp,
1291 const struct switchdev_obj_port_vlan *vlan,
1292 struct netlink_ext_ack *extack)
1294 struct dsa_notifier_vlan_info info = {
1299 struct dsa_port *cpu_dp = dp->cpu_dp;
1302 err = dsa_port_notify(dp, DSA_NOTIFIER_HOST_VLAN_ADD, &info);
1303 if (err && err != -EOPNOTSUPP)
1306 vlan_vid_add(cpu_dp->master, htons(ETH_P_8021Q), vlan->vid);
1311 int dsa_port_host_vlan_del(struct dsa_port *dp,
1312 const struct switchdev_obj_port_vlan *vlan)
1314 struct dsa_notifier_vlan_info info = {
1318 struct dsa_port *cpu_dp = dp->cpu_dp;
1321 err = dsa_port_notify(dp, DSA_NOTIFIER_HOST_VLAN_DEL, &info);
1322 if (err && err != -EOPNOTSUPP)
1325 vlan_vid_del(cpu_dp->master, htons(ETH_P_8021Q), vlan->vid);
1330 int dsa_port_mrp_add(const struct dsa_port *dp,
1331 const struct switchdev_obj_mrp *mrp)
1333 struct dsa_switch *ds = dp->ds;
1335 if (!ds->ops->port_mrp_add)
1338 return ds->ops->port_mrp_add(ds, dp->index, mrp);
1341 int dsa_port_mrp_del(const struct dsa_port *dp,
1342 const struct switchdev_obj_mrp *mrp)
1344 struct dsa_switch *ds = dp->ds;
1346 if (!ds->ops->port_mrp_del)
1349 return ds->ops->port_mrp_del(ds, dp->index, mrp);
1352 int dsa_port_mrp_add_ring_role(const struct dsa_port *dp,
1353 const struct switchdev_obj_ring_role_mrp *mrp)
1355 struct dsa_switch *ds = dp->ds;
1357 if (!ds->ops->port_mrp_add_ring_role)
1360 return ds->ops->port_mrp_add_ring_role(ds, dp->index, mrp);
1363 int dsa_port_mrp_del_ring_role(const struct dsa_port *dp,
1364 const struct switchdev_obj_ring_role_mrp *mrp)
1366 struct dsa_switch *ds = dp->ds;
1368 if (!ds->ops->port_mrp_del_ring_role)
1371 return ds->ops->port_mrp_del_ring_role(ds, dp->index, mrp);
1374 void dsa_port_set_tag_protocol(struct dsa_port *cpu_dp,
1375 const struct dsa_device_ops *tag_ops)
1377 cpu_dp->rcv = tag_ops->rcv;
1378 cpu_dp->tag_ops = tag_ops;
1381 static struct phy_device *dsa_port_get_phy_device(struct dsa_port *dp)
1383 struct device_node *phy_dn;
1384 struct phy_device *phydev;
1386 phy_dn = of_parse_phandle(dp->dn, "phy-handle", 0);
1390 phydev = of_phy_find_device(phy_dn);
1392 of_node_put(phy_dn);
1393 return ERR_PTR(-EPROBE_DEFER);
1396 of_node_put(phy_dn);
1400 static void dsa_port_phylink_validate(struct phylink_config *config,
1401 unsigned long *supported,
1402 struct phylink_link_state *state)
1404 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
1405 struct dsa_switch *ds = dp->ds;
1407 if (!ds->ops->phylink_validate) {
1408 if (config->mac_capabilities)
1409 phylink_generic_validate(config, supported, state);
1413 ds->ops->phylink_validate(ds, dp->index, supported, state);
1416 static void dsa_port_phylink_mac_pcs_get_state(struct phylink_config *config,
1417 struct phylink_link_state *state)
1419 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
1420 struct dsa_switch *ds = dp->ds;
1423 /* Only called for inband modes */
1424 if (!ds->ops->phylink_mac_link_state) {
1429 err = ds->ops->phylink_mac_link_state(ds, dp->index, state);
1431 dev_err(ds->dev, "p%d: phylink_mac_link_state() failed: %d\n",
1437 static struct phylink_pcs *
1438 dsa_port_phylink_mac_select_pcs(struct phylink_config *config,
1439 phy_interface_t interface)
1441 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
1442 struct phylink_pcs *pcs = ERR_PTR(-EOPNOTSUPP);
1443 struct dsa_switch *ds = dp->ds;
1445 if (ds->ops->phylink_mac_select_pcs)
1446 pcs = ds->ops->phylink_mac_select_pcs(ds, dp->index, interface);
1451 static void dsa_port_phylink_mac_config(struct phylink_config *config,
1453 const struct phylink_link_state *state)
1455 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
1456 struct dsa_switch *ds = dp->ds;
1458 if (!ds->ops->phylink_mac_config)
1461 ds->ops->phylink_mac_config(ds, dp->index, mode, state);
1464 static void dsa_port_phylink_mac_an_restart(struct phylink_config *config)
1466 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
1467 struct dsa_switch *ds = dp->ds;
1469 if (!ds->ops->phylink_mac_an_restart)
1472 ds->ops->phylink_mac_an_restart(ds, dp->index);
1475 static void dsa_port_phylink_mac_link_down(struct phylink_config *config,
1477 phy_interface_t interface)
1479 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
1480 struct phy_device *phydev = NULL;
1481 struct dsa_switch *ds = dp->ds;
1483 if (dsa_port_is_user(dp))
1484 phydev = dp->slave->phydev;
1486 if (!ds->ops->phylink_mac_link_down) {
1487 if (ds->ops->adjust_link && phydev)
1488 ds->ops->adjust_link(ds, dp->index, phydev);
1492 ds->ops->phylink_mac_link_down(ds, dp->index, mode, interface);
1495 static void dsa_port_phylink_mac_link_up(struct phylink_config *config,
1496 struct phy_device *phydev,
1498 phy_interface_t interface,
1499 int speed, int duplex,
1500 bool tx_pause, bool rx_pause)
1502 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
1503 struct dsa_switch *ds = dp->ds;
1505 if (!ds->ops->phylink_mac_link_up) {
1506 if (ds->ops->adjust_link && phydev)
1507 ds->ops->adjust_link(ds, dp->index, phydev);
1511 ds->ops->phylink_mac_link_up(ds, dp->index, mode, interface, phydev,
1512 speed, duplex, tx_pause, rx_pause);
1515 static const struct phylink_mac_ops dsa_port_phylink_mac_ops = {
1516 .validate = dsa_port_phylink_validate,
1517 .mac_select_pcs = dsa_port_phylink_mac_select_pcs,
1518 .mac_pcs_get_state = dsa_port_phylink_mac_pcs_get_state,
1519 .mac_config = dsa_port_phylink_mac_config,
1520 .mac_an_restart = dsa_port_phylink_mac_an_restart,
1521 .mac_link_down = dsa_port_phylink_mac_link_down,
1522 .mac_link_up = dsa_port_phylink_mac_link_up,
1525 int dsa_port_phylink_create(struct dsa_port *dp)
1527 struct dsa_switch *ds = dp->ds;
1528 phy_interface_t mode;
1531 err = of_get_phy_mode(dp->dn, &mode);
1533 mode = PHY_INTERFACE_MODE_NA;
1535 /* Presence of phylink_mac_link_state or phylink_mac_an_restart is
1536 * an indicator of a legacy phylink driver.
1538 if (ds->ops->phylink_mac_link_state ||
1539 ds->ops->phylink_mac_an_restart)
1540 dp->pl_config.legacy_pre_march2020 = true;
1542 if (ds->ops->phylink_get_caps)
1543 ds->ops->phylink_get_caps(ds, dp->index, &dp->pl_config);
1545 dp->pl = phylink_create(&dp->pl_config, of_fwnode_handle(dp->dn),
1546 mode, &dsa_port_phylink_mac_ops);
1547 if (IS_ERR(dp->pl)) {
1548 pr_err("error creating PHYLINK: %ld\n", PTR_ERR(dp->pl));
1549 return PTR_ERR(dp->pl);
1555 static int dsa_port_setup_phy_of(struct dsa_port *dp, bool enable)
1557 struct dsa_switch *ds = dp->ds;
1558 struct phy_device *phydev;
1559 int port = dp->index;
1562 phydev = dsa_port_get_phy_device(dp);
1567 return PTR_ERR(phydev);
1570 err = genphy_resume(phydev);
1574 err = genphy_read_status(phydev);
1578 err = genphy_suspend(phydev);
1583 if (ds->ops->adjust_link)
1584 ds->ops->adjust_link(ds, port, phydev);
1586 dev_dbg(ds->dev, "enabled port's phy: %s", phydev_name(phydev));
1589 put_device(&phydev->mdio.dev);
1593 static int dsa_port_fixed_link_register_of(struct dsa_port *dp)
1595 struct device_node *dn = dp->dn;
1596 struct dsa_switch *ds = dp->ds;
1597 struct phy_device *phydev;
1598 int port = dp->index;
1599 phy_interface_t mode;
1602 err = of_phy_register_fixed_link(dn);
1605 "failed to register the fixed PHY of port %d\n",
1610 phydev = of_phy_find_device(dn);
1612 err = of_get_phy_mode(dn, &mode);
1614 mode = PHY_INTERFACE_MODE_NA;
1615 phydev->interface = mode;
1617 genphy_read_status(phydev);
1619 if (ds->ops->adjust_link)
1620 ds->ops->adjust_link(ds, port, phydev);
1622 put_device(&phydev->mdio.dev);
1627 static int dsa_port_phylink_register(struct dsa_port *dp)
1629 struct dsa_switch *ds = dp->ds;
1630 struct device_node *port_dn = dp->dn;
1633 dp->pl_config.dev = ds->dev;
1634 dp->pl_config.type = PHYLINK_DEV;
1636 err = dsa_port_phylink_create(dp);
1640 err = phylink_of_phy_connect(dp->pl, port_dn, 0);
1641 if (err && err != -ENODEV) {
1642 pr_err("could not attach to PHY: %d\n", err);
1643 goto err_phy_connect;
1649 phylink_destroy(dp->pl);
1653 int dsa_port_link_register_of(struct dsa_port *dp)
1655 struct dsa_switch *ds = dp->ds;
1656 struct device_node *phy_np;
1657 int port = dp->index;
1659 if (!ds->ops->adjust_link) {
1660 phy_np = of_parse_phandle(dp->dn, "phy-handle", 0);
1661 if (of_phy_is_fixed_link(dp->dn) || phy_np) {
1662 if (ds->ops->phylink_mac_link_down)
1663 ds->ops->phylink_mac_link_down(ds, port,
1664 MLO_AN_FIXED, PHY_INTERFACE_MODE_NA);
1665 of_node_put(phy_np);
1666 return dsa_port_phylink_register(dp);
1668 of_node_put(phy_np);
1673 "Using legacy PHYLIB callbacks. Please migrate to PHYLINK!\n");
1675 if (of_phy_is_fixed_link(dp->dn))
1676 return dsa_port_fixed_link_register_of(dp);
1678 return dsa_port_setup_phy_of(dp, true);
1681 void dsa_port_link_unregister_of(struct dsa_port *dp)
1683 struct dsa_switch *ds = dp->ds;
1685 if (!ds->ops->adjust_link && dp->pl) {
1687 phylink_disconnect_phy(dp->pl);
1689 phylink_destroy(dp->pl);
1694 if (of_phy_is_fixed_link(dp->dn))
1695 of_phy_deregister_fixed_link(dp->dn);
1697 dsa_port_setup_phy_of(dp, false);
1700 int dsa_port_hsr_join(struct dsa_port *dp, struct net_device *hsr)
1702 struct dsa_switch *ds = dp->ds;
1705 if (!ds->ops->port_hsr_join)
1710 err = ds->ops->port_hsr_join(ds, dp->index, hsr);
1717 void dsa_port_hsr_leave(struct dsa_port *dp, struct net_device *hsr)
1719 struct dsa_switch *ds = dp->ds;
1724 if (ds->ops->port_hsr_leave) {
1725 err = ds->ops->port_hsr_leave(ds, dp->index, hsr);
1727 dev_err(dp->ds->dev,
1728 "port %d failed to leave HSR %s: %pe\n",
1729 dp->index, hsr->name, ERR_PTR(err));
1733 int dsa_port_tag_8021q_vlan_add(struct dsa_port *dp, u16 vid, bool broadcast)
1735 struct dsa_notifier_tag_8021q_vlan_info info = {
1741 return dsa_broadcast(DSA_NOTIFIER_TAG_8021Q_VLAN_ADD, &info);
1743 return dsa_port_notify(dp, DSA_NOTIFIER_TAG_8021Q_VLAN_ADD, &info);
1746 void dsa_port_tag_8021q_vlan_del(struct dsa_port *dp, u16 vid, bool broadcast)
1748 struct dsa_notifier_tag_8021q_vlan_info info = {
1755 err = dsa_broadcast(DSA_NOTIFIER_TAG_8021Q_VLAN_DEL, &info);
1757 err = dsa_port_notify(dp, DSA_NOTIFIER_TAG_8021Q_VLAN_DEL, &info);
1759 dev_err(dp->ds->dev,
1760 "port %d failed to notify tag_8021q VLAN %d deletion: %pe\n",
1761 dp->index, vid, ERR_PTR(err));