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/netdevice.h>
11 #include <linux/notifier.h>
12 #include <linux/of_mdio.h>
13 #include <linux/of_net.h>
18 * dsa_port_notify - Notify the switching fabric of changes to a port
19 * @dp: port on which change occurred
20 * @e: event, must be of type DSA_NOTIFIER_*
21 * @v: event-specific value.
23 * Notify all switches in the DSA tree that this port's switch belongs to,
24 * including this switch itself, of an event. Allows the other switches to
25 * reconfigure themselves for cross-chip operations. Can also be used to
26 * reconfigure ports without net_devices (CPU ports, DSA links) whenever
27 * a user port's state changes.
29 static int dsa_port_notify(const struct dsa_port *dp, unsigned long e, void *v)
31 return dsa_tree_notify(dp->ds->dst, e, v);
34 static void dsa_port_notify_bridge_fdb_flush(const struct dsa_port *dp, u16 vid)
36 struct net_device *brport_dev = dsa_port_to_bridge_port(dp);
37 struct switchdev_notifier_fdb_info info = {
41 /* When the port becomes standalone it has already left the bridge.
42 * Don't notify the bridge in that case.
47 call_switchdev_notifiers(SWITCHDEV_FDB_FLUSH_TO_BRIDGE,
48 brport_dev, &info.info, NULL);
51 static void dsa_port_fast_age(const struct dsa_port *dp)
53 struct dsa_switch *ds = dp->ds;
55 if (!ds->ops->port_fast_age)
58 ds->ops->port_fast_age(ds, dp->index);
61 dsa_port_notify_bridge_fdb_flush(dp, 0);
64 static int dsa_port_vlan_fast_age(const struct dsa_port *dp, u16 vid)
66 struct dsa_switch *ds = dp->ds;
69 if (!ds->ops->port_vlan_fast_age)
72 err = ds->ops->port_vlan_fast_age(ds, dp->index, vid);
75 dsa_port_notify_bridge_fdb_flush(dp, vid);
80 static int dsa_port_msti_fast_age(const struct dsa_port *dp, u16 msti)
82 DECLARE_BITMAP(vids, VLAN_N_VID) = { 0 };
85 err = br_mst_get_info(dsa_port_bridge_dev_get(dp), msti, vids);
89 for_each_set_bit(vid, vids, VLAN_N_VID) {
90 err = dsa_port_vlan_fast_age(dp, vid);
98 static bool dsa_port_can_configure_learning(struct dsa_port *dp)
100 struct switchdev_brport_flags flags = {
103 struct dsa_switch *ds = dp->ds;
106 if (!ds->ops->port_bridge_flags || !ds->ops->port_pre_bridge_flags)
109 err = ds->ops->port_pre_bridge_flags(ds, dp->index, flags, NULL);
113 bool dsa_port_supports_hwtstamp(struct dsa_port *dp, struct ifreq *ifr)
115 struct dsa_switch *ds = dp->ds;
118 if (!ds->ops->port_hwtstamp_get || !ds->ops->port_hwtstamp_set)
121 /* "See through" shim implementations of the "get" method.
122 * This will clobber the ifreq structure, but we will either return an
123 * error, or the master will overwrite it with proper values.
125 err = ds->ops->port_hwtstamp_get(ds, dp->index, ifr);
126 return err != -EOPNOTSUPP;
129 int dsa_port_set_state(struct dsa_port *dp, u8 state, bool do_fast_age)
131 struct dsa_switch *ds = dp->ds;
132 int port = dp->index;
134 if (!ds->ops->port_stp_state_set)
137 ds->ops->port_stp_state_set(ds, port, state);
139 if (!dsa_port_can_configure_learning(dp) ||
140 (do_fast_age && dp->learning)) {
141 /* Fast age FDB entries or flush appropriate forwarding database
142 * for the given port, if we are moving it from Learning or
143 * Forwarding state, to Disabled or Blocking or Listening state.
144 * Ports that were standalone before the STP state change don't
145 * need to fast age the FDB, since address learning is off in
149 if ((dp->stp_state == BR_STATE_LEARNING ||
150 dp->stp_state == BR_STATE_FORWARDING) &&
151 (state == BR_STATE_DISABLED ||
152 state == BR_STATE_BLOCKING ||
153 state == BR_STATE_LISTENING))
154 dsa_port_fast_age(dp);
157 dp->stp_state = state;
162 static void dsa_port_set_state_now(struct dsa_port *dp, u8 state,
165 struct dsa_switch *ds = dp->ds;
168 err = dsa_port_set_state(dp, state, do_fast_age);
169 if (err && err != -EOPNOTSUPP) {
170 dev_err(ds->dev, "port %d failed to set STP state %u: %pe\n",
171 dp->index, state, ERR_PTR(err));
175 int dsa_port_set_mst_state(struct dsa_port *dp,
176 const struct switchdev_mst_state *state,
177 struct netlink_ext_ack *extack)
179 struct dsa_switch *ds = dp->ds;
183 if (!ds->ops->port_mst_state_set)
186 err = br_mst_get_state(dsa_port_to_bridge_port(dp), state->msti,
191 err = ds->ops->port_mst_state_set(ds, dp->index, state);
195 if (!(dp->learning &&
196 (prev_state == BR_STATE_LEARNING ||
197 prev_state == BR_STATE_FORWARDING) &&
198 (state->state == BR_STATE_DISABLED ||
199 state->state == BR_STATE_BLOCKING ||
200 state->state == BR_STATE_LISTENING)))
203 err = dsa_port_msti_fast_age(dp, state->msti);
205 NL_SET_ERR_MSG_MOD(extack,
206 "Unable to flush associated VLANs");
211 int dsa_port_enable_rt(struct dsa_port *dp, struct phy_device *phy)
213 struct dsa_switch *ds = dp->ds;
214 int port = dp->index;
217 if (ds->ops->port_enable) {
218 err = ds->ops->port_enable(ds, port, phy);
224 dsa_port_set_state_now(dp, BR_STATE_FORWARDING, false);
227 phylink_start(dp->pl);
232 int dsa_port_enable(struct dsa_port *dp, struct phy_device *phy)
237 err = dsa_port_enable_rt(dp, phy);
243 void dsa_port_disable_rt(struct dsa_port *dp)
245 struct dsa_switch *ds = dp->ds;
246 int port = dp->index;
249 phylink_stop(dp->pl);
252 dsa_port_set_state_now(dp, BR_STATE_DISABLED, false);
254 if (ds->ops->port_disable)
255 ds->ops->port_disable(ds, port);
258 void dsa_port_disable(struct dsa_port *dp)
261 dsa_port_disable_rt(dp);
265 static void dsa_port_reset_vlan_filtering(struct dsa_port *dp,
266 struct dsa_bridge bridge)
268 struct netlink_ext_ack extack = {0};
269 bool change_vlan_filtering = false;
270 struct dsa_switch *ds = dp->ds;
271 struct dsa_port *other_dp;
275 if (ds->needs_standalone_vlan_filtering &&
276 !br_vlan_enabled(bridge.dev)) {
277 change_vlan_filtering = true;
278 vlan_filtering = true;
279 } else if (!ds->needs_standalone_vlan_filtering &&
280 br_vlan_enabled(bridge.dev)) {
281 change_vlan_filtering = true;
282 vlan_filtering = false;
285 /* If the bridge was vlan_filtering, the bridge core doesn't trigger an
286 * event for changing vlan_filtering setting upon slave ports leaving
287 * it. That is a good thing, because that lets us handle it and also
288 * handle the case where the switch's vlan_filtering setting is global
289 * (not per port). When that happens, the correct moment to trigger the
290 * vlan_filtering callback is only when the last port leaves the last
293 if (change_vlan_filtering && ds->vlan_filtering_is_global) {
294 dsa_switch_for_each_port(other_dp, ds) {
295 struct net_device *br = dsa_port_bridge_dev_get(other_dp);
297 if (br && br_vlan_enabled(br)) {
298 change_vlan_filtering = false;
304 if (!change_vlan_filtering)
307 err = dsa_port_vlan_filtering(dp, vlan_filtering, &extack);
309 dev_err(ds->dev, "port %d: %s\n", dp->index,
312 if (err && err != -EOPNOTSUPP) {
314 "port %d failed to reset VLAN filtering to %d: %pe\n",
315 dp->index, vlan_filtering, ERR_PTR(err));
319 static int dsa_port_inherit_brport_flags(struct dsa_port *dp,
320 struct netlink_ext_ack *extack)
322 const unsigned long mask = BR_LEARNING | BR_FLOOD | BR_MCAST_FLOOD |
323 BR_BCAST_FLOOD | BR_PORT_LOCKED;
324 struct net_device *brport_dev = dsa_port_to_bridge_port(dp);
327 for_each_set_bit(flag, &mask, 32) {
328 struct switchdev_brport_flags flags = {0};
330 flags.mask = BIT(flag);
332 if (br_port_flag_is_set(brport_dev, BIT(flag)))
333 flags.val = BIT(flag);
335 err = dsa_port_bridge_flags(dp, flags, extack);
336 if (err && err != -EOPNOTSUPP)
343 static void dsa_port_clear_brport_flags(struct dsa_port *dp)
345 const unsigned long val = BR_FLOOD | BR_MCAST_FLOOD | BR_BCAST_FLOOD;
346 const unsigned long mask = BR_LEARNING | BR_FLOOD | BR_MCAST_FLOOD |
347 BR_BCAST_FLOOD | BR_PORT_LOCKED;
350 for_each_set_bit(flag, &mask, 32) {
351 struct switchdev_brport_flags flags = {0};
353 flags.mask = BIT(flag);
354 flags.val = val & BIT(flag);
356 err = dsa_port_bridge_flags(dp, flags, NULL);
357 if (err && err != -EOPNOTSUPP)
359 "failed to clear bridge port flag %lu: %pe\n",
360 flags.val, ERR_PTR(err));
364 static int dsa_port_switchdev_sync_attrs(struct dsa_port *dp,
365 struct netlink_ext_ack *extack)
367 struct net_device *brport_dev = dsa_port_to_bridge_port(dp);
368 struct net_device *br = dsa_port_bridge_dev_get(dp);
371 err = dsa_port_inherit_brport_flags(dp, extack);
375 err = dsa_port_set_state(dp, br_port_get_stp_state(brport_dev), false);
376 if (err && err != -EOPNOTSUPP)
379 err = dsa_port_vlan_filtering(dp, br_vlan_enabled(br), extack);
380 if (err && err != -EOPNOTSUPP)
383 err = dsa_port_ageing_time(dp, br_get_ageing_time(br));
384 if (err && err != -EOPNOTSUPP)
390 static void dsa_port_switchdev_unsync_attrs(struct dsa_port *dp,
391 struct dsa_bridge bridge)
393 /* Configure the port for standalone mode (no address learning,
395 * The bridge only emits SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS events
396 * when the user requests it through netlink or sysfs, but not
397 * automatically at port join or leave, so we need to handle resetting
398 * the brport flags ourselves. But we even prefer it that way, because
399 * otherwise, some setups might never get the notification they need,
400 * for example, when a port leaves a LAG that offloads the bridge,
401 * it becomes standalone, but as far as the bridge is concerned, no
404 dsa_port_clear_brport_flags(dp);
406 /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
407 * so allow it to be in BR_STATE_FORWARDING to be kept functional
409 dsa_port_set_state_now(dp, BR_STATE_FORWARDING, true);
411 dsa_port_reset_vlan_filtering(dp, bridge);
413 /* Ageing time may be global to the switch chip, so don't change it
414 * here because we have no good reason (or value) to change it to.
418 static int dsa_port_bridge_create(struct dsa_port *dp,
419 struct net_device *br,
420 struct netlink_ext_ack *extack)
422 struct dsa_switch *ds = dp->ds;
423 struct dsa_bridge *bridge;
425 bridge = dsa_tree_bridge_find(ds->dst, br);
427 refcount_inc(&bridge->refcount);
432 bridge = kzalloc(sizeof(*bridge), GFP_KERNEL);
436 refcount_set(&bridge->refcount, 1);
440 bridge->num = dsa_bridge_num_get(br, ds->max_num_bridges);
441 if (ds->max_num_bridges && !bridge->num) {
442 NL_SET_ERR_MSG_MOD(extack,
443 "Range of offloadable bridges exceeded");
453 static void dsa_port_bridge_destroy(struct dsa_port *dp,
454 const struct net_device *br)
456 struct dsa_bridge *bridge = dp->bridge;
460 if (!refcount_dec_and_test(&bridge->refcount))
464 dsa_bridge_num_put(br, bridge->num);
469 static bool dsa_port_supports_mst(struct dsa_port *dp)
471 struct dsa_switch *ds = dp->ds;
473 return ds->ops->vlan_msti_set &&
474 ds->ops->port_mst_state_set &&
475 ds->ops->port_vlan_fast_age &&
476 dsa_port_can_configure_learning(dp);
479 int dsa_port_bridge_join(struct dsa_port *dp, struct net_device *br,
480 struct netlink_ext_ack *extack)
482 struct dsa_notifier_bridge_info info = {
486 struct net_device *dev = dp->slave;
487 struct net_device *brport_dev;
490 if (br_mst_enabled(br) && !dsa_port_supports_mst(dp))
493 /* Here the interface is already bridged. Reflect the current
494 * configuration so that drivers can program their chips accordingly.
496 err = dsa_port_bridge_create(dp, br, extack);
500 brport_dev = dsa_port_to_bridge_port(dp);
502 info.bridge = *dp->bridge;
503 err = dsa_broadcast(DSA_NOTIFIER_BRIDGE_JOIN, &info);
507 /* Drivers which support bridge TX forwarding should set this */
508 dp->bridge->tx_fwd_offload = info.tx_fwd_offload;
510 err = switchdev_bridge_port_offload(brport_dev, dev, dp,
511 &dsa_slave_switchdev_notifier,
512 &dsa_slave_switchdev_blocking_notifier,
513 dp->bridge->tx_fwd_offload, extack);
515 goto out_rollback_unbridge;
517 err = dsa_port_switchdev_sync_attrs(dp, extack);
519 goto out_rollback_unoffload;
523 out_rollback_unoffload:
524 switchdev_bridge_port_unoffload(brport_dev, dp,
525 &dsa_slave_switchdev_notifier,
526 &dsa_slave_switchdev_blocking_notifier);
527 dsa_flush_workqueue();
528 out_rollback_unbridge:
529 dsa_broadcast(DSA_NOTIFIER_BRIDGE_LEAVE, &info);
531 dsa_port_bridge_destroy(dp, br);
535 void dsa_port_pre_bridge_leave(struct dsa_port *dp, struct net_device *br)
537 struct net_device *brport_dev = dsa_port_to_bridge_port(dp);
539 /* Don't try to unoffload something that is not offloaded */
543 switchdev_bridge_port_unoffload(brport_dev, dp,
544 &dsa_slave_switchdev_notifier,
545 &dsa_slave_switchdev_blocking_notifier);
547 dsa_flush_workqueue();
550 void dsa_port_bridge_leave(struct dsa_port *dp, struct net_device *br)
552 struct dsa_notifier_bridge_info info = {
557 /* If the port could not be offloaded to begin with, then
558 * there is nothing to do.
563 info.bridge = *dp->bridge;
565 /* Here the port is already unbridged. Reflect the current configuration
566 * so that drivers can program their chips accordingly.
568 dsa_port_bridge_destroy(dp, br);
570 err = dsa_broadcast(DSA_NOTIFIER_BRIDGE_LEAVE, &info);
573 "port %d failed to notify DSA_NOTIFIER_BRIDGE_LEAVE: %pe\n",
574 dp->index, ERR_PTR(err));
576 dsa_port_switchdev_unsync_attrs(dp, info.bridge);
579 int dsa_port_lag_change(struct dsa_port *dp,
580 struct netdev_lag_lower_state_info *linfo)
582 struct dsa_notifier_lag_info info = {
590 /* On statically configured aggregates (e.g. loadbalance
591 * without LACP) ports will always be tx_enabled, even if the
592 * link is down. Thus we require both link_up and tx_enabled
593 * in order to include it in the tx set.
595 tx_enabled = linfo->link_up && linfo->tx_enabled;
597 if (tx_enabled == dp->lag_tx_enabled)
600 dp->lag_tx_enabled = tx_enabled;
602 return dsa_port_notify(dp, DSA_NOTIFIER_LAG_CHANGE, &info);
605 static int dsa_port_lag_create(struct dsa_port *dp,
606 struct net_device *lag_dev)
608 struct dsa_switch *ds = dp->ds;
611 lag = dsa_tree_lag_find(ds->dst, lag_dev);
613 refcount_inc(&lag->refcount);
618 lag = kzalloc(sizeof(*lag), GFP_KERNEL);
622 refcount_set(&lag->refcount, 1);
623 mutex_init(&lag->fdb_lock);
624 INIT_LIST_HEAD(&lag->fdbs);
626 dsa_lag_map(ds->dst, lag);
632 static void dsa_port_lag_destroy(struct dsa_port *dp)
634 struct dsa_lag *lag = dp->lag;
637 dp->lag_tx_enabled = false;
639 if (!refcount_dec_and_test(&lag->refcount))
642 WARN_ON(!list_empty(&lag->fdbs));
643 dsa_lag_unmap(dp->ds->dst, lag);
647 int dsa_port_lag_join(struct dsa_port *dp, struct net_device *lag_dev,
648 struct netdev_lag_upper_info *uinfo,
649 struct netlink_ext_ack *extack)
651 struct dsa_notifier_lag_info info = {
656 struct net_device *bridge_dev;
659 err = dsa_port_lag_create(dp, lag_dev);
664 err = dsa_port_notify(dp, DSA_NOTIFIER_LAG_JOIN, &info);
668 bridge_dev = netdev_master_upper_dev_get(lag_dev);
669 if (!bridge_dev || !netif_is_bridge_master(bridge_dev))
672 err = dsa_port_bridge_join(dp, bridge_dev, extack);
674 goto err_bridge_join;
679 dsa_port_notify(dp, DSA_NOTIFIER_LAG_LEAVE, &info);
681 dsa_port_lag_destroy(dp);
686 void dsa_port_pre_lag_leave(struct dsa_port *dp, struct net_device *lag_dev)
688 struct net_device *br = dsa_port_bridge_dev_get(dp);
691 dsa_port_pre_bridge_leave(dp, br);
694 void dsa_port_lag_leave(struct dsa_port *dp, struct net_device *lag_dev)
696 struct net_device *br = dsa_port_bridge_dev_get(dp);
697 struct dsa_notifier_lag_info info = {
705 /* Port might have been part of a LAG that in turn was
706 * attached to a bridge.
709 dsa_port_bridge_leave(dp, br);
713 dsa_port_lag_destroy(dp);
715 err = dsa_port_notify(dp, DSA_NOTIFIER_LAG_LEAVE, &info);
718 "port %d failed to notify DSA_NOTIFIER_LAG_LEAVE: %pe\n",
719 dp->index, ERR_PTR(err));
722 /* Must be called under rcu_read_lock() */
723 static bool dsa_port_can_apply_vlan_filtering(struct dsa_port *dp,
725 struct netlink_ext_ack *extack)
727 struct dsa_switch *ds = dp->ds;
728 struct dsa_port *other_dp;
731 /* VLAN awareness was off, so the question is "can we turn it on".
732 * We may have had 8021q uppers, those need to go. Make sure we don't
733 * enter an inconsistent state: deny changing the VLAN awareness state
734 * as long as we have 8021q uppers.
736 if (vlan_filtering && dsa_port_is_user(dp)) {
737 struct net_device *br = dsa_port_bridge_dev_get(dp);
738 struct net_device *upper_dev, *slave = dp->slave;
739 struct list_head *iter;
741 netdev_for_each_upper_dev_rcu(slave, upper_dev, iter) {
742 struct bridge_vlan_info br_info;
745 if (!is_vlan_dev(upper_dev))
748 vid = vlan_dev_vlan_id(upper_dev);
750 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the
751 * device, respectively the VID is not found, returning
752 * 0 means success, which is a failure for us here.
754 err = br_vlan_get_info(br, vid, &br_info);
756 NL_SET_ERR_MSG_MOD(extack,
757 "Must first remove VLAN uppers having VIDs also present in bridge");
763 if (!ds->vlan_filtering_is_global)
766 /* For cases where enabling/disabling VLAN awareness is global to the
767 * switch, we need to handle the case where multiple bridges span
768 * different ports of the same switch device and one of them has a
769 * different setting than what is being requested.
771 dsa_switch_for_each_port(other_dp, ds) {
772 struct net_device *other_br = dsa_port_bridge_dev_get(other_dp);
774 /* If it's the same bridge, it also has same
775 * vlan_filtering setting => no need to check
777 if (!other_br || other_br == dsa_port_bridge_dev_get(dp))
780 if (br_vlan_enabled(other_br) != vlan_filtering) {
781 NL_SET_ERR_MSG_MOD(extack,
782 "VLAN filtering is a global setting");
789 int dsa_port_vlan_filtering(struct dsa_port *dp, bool vlan_filtering,
790 struct netlink_ext_ack *extack)
792 bool old_vlan_filtering = dsa_port_is_vlan_filtering(dp);
793 struct dsa_switch *ds = dp->ds;
797 if (!ds->ops->port_vlan_filtering)
800 /* We are called from dsa_slave_switchdev_blocking_event(),
801 * which is not under rcu_read_lock(), unlike
802 * dsa_slave_switchdev_event().
805 apply = dsa_port_can_apply_vlan_filtering(dp, vlan_filtering, extack);
810 if (dsa_port_is_vlan_filtering(dp) == vlan_filtering)
813 err = ds->ops->port_vlan_filtering(ds, dp->index, vlan_filtering,
818 if (ds->vlan_filtering_is_global) {
819 struct dsa_port *other_dp;
821 ds->vlan_filtering = vlan_filtering;
823 dsa_switch_for_each_user_port(other_dp, ds) {
824 struct net_device *slave = other_dp->slave;
826 /* We might be called in the unbind path, so not
827 * all slave devices might still be registered.
832 err = dsa_slave_manage_vlan_filtering(slave,
838 dp->vlan_filtering = vlan_filtering;
840 err = dsa_slave_manage_vlan_filtering(dp->slave,
849 ds->ops->port_vlan_filtering(ds, dp->index, old_vlan_filtering, NULL);
851 if (ds->vlan_filtering_is_global)
852 ds->vlan_filtering = old_vlan_filtering;
854 dp->vlan_filtering = old_vlan_filtering;
859 /* This enforces legacy behavior for switch drivers which assume they can't
860 * receive VLAN configuration when enslaved to a bridge with vlan_filtering=0
862 bool dsa_port_skip_vlan_configuration(struct dsa_port *dp)
864 struct net_device *br = dsa_port_bridge_dev_get(dp);
865 struct dsa_switch *ds = dp->ds;
870 return !ds->configure_vlan_while_not_filtering && !br_vlan_enabled(br);
873 int dsa_port_ageing_time(struct dsa_port *dp, clock_t ageing_clock)
875 unsigned long ageing_jiffies = clock_t_to_jiffies(ageing_clock);
876 unsigned int ageing_time = jiffies_to_msecs(ageing_jiffies);
877 struct dsa_notifier_ageing_time_info info;
880 info.ageing_time = ageing_time;
882 err = dsa_port_notify(dp, DSA_NOTIFIER_AGEING_TIME, &info);
886 dp->ageing_time = ageing_time;
891 int dsa_port_mst_enable(struct dsa_port *dp, bool on,
892 struct netlink_ext_ack *extack)
894 if (on && !dsa_port_supports_mst(dp)) {
895 NL_SET_ERR_MSG_MOD(extack, "Hardware does not support MST");
902 int dsa_port_pre_bridge_flags(const struct dsa_port *dp,
903 struct switchdev_brport_flags flags,
904 struct netlink_ext_ack *extack)
906 struct dsa_switch *ds = dp->ds;
908 if (!ds->ops->port_pre_bridge_flags)
911 return ds->ops->port_pre_bridge_flags(ds, dp->index, flags, extack);
914 int dsa_port_bridge_flags(struct dsa_port *dp,
915 struct switchdev_brport_flags flags,
916 struct netlink_ext_ack *extack)
918 struct dsa_switch *ds = dp->ds;
921 if (!ds->ops->port_bridge_flags)
924 err = ds->ops->port_bridge_flags(ds, dp->index, flags, extack);
928 if (flags.mask & BR_LEARNING) {
929 bool learning = flags.val & BR_LEARNING;
931 if (learning == dp->learning)
934 if ((dp->learning && !learning) &&
935 (dp->stp_state == BR_STATE_LEARNING ||
936 dp->stp_state == BR_STATE_FORWARDING))
937 dsa_port_fast_age(dp);
939 dp->learning = learning;
945 void dsa_port_set_host_flood(struct dsa_port *dp, bool uc, bool mc)
947 struct dsa_switch *ds = dp->ds;
949 if (ds->ops->port_set_host_flood)
950 ds->ops->port_set_host_flood(ds, dp->index, uc, mc);
953 int dsa_port_vlan_msti(struct dsa_port *dp,
954 const struct switchdev_vlan_msti *msti)
956 struct dsa_switch *ds = dp->ds;
958 if (!ds->ops->vlan_msti_set)
961 return ds->ops->vlan_msti_set(ds, *dp->bridge, msti);
964 int dsa_port_mtu_change(struct dsa_port *dp, int new_mtu)
966 struct dsa_notifier_mtu_info info = {
971 return dsa_port_notify(dp, DSA_NOTIFIER_MTU, &info);
974 int dsa_port_fdb_add(struct dsa_port *dp, const unsigned char *addr,
977 struct dsa_notifier_fdb_info info = {
982 .type = DSA_DB_BRIDGE,
983 .bridge = *dp->bridge,
987 /* Refcounting takes bridge.num as a key, and should be global for all
988 * bridges in the absence of FDB isolation, and per bridge otherwise.
989 * Force the bridge.num to zero here in the absence of FDB isolation.
991 if (!dp->ds->fdb_isolation)
992 info.db.bridge.num = 0;
994 return dsa_port_notify(dp, DSA_NOTIFIER_FDB_ADD, &info);
997 int dsa_port_fdb_del(struct dsa_port *dp, const unsigned char *addr,
1000 struct dsa_notifier_fdb_info info = {
1005 .type = DSA_DB_BRIDGE,
1006 .bridge = *dp->bridge,
1010 if (!dp->ds->fdb_isolation)
1011 info.db.bridge.num = 0;
1013 return dsa_port_notify(dp, DSA_NOTIFIER_FDB_DEL, &info);
1016 static int dsa_port_host_fdb_add(struct dsa_port *dp,
1017 const unsigned char *addr, u16 vid,
1020 struct dsa_notifier_fdb_info info = {
1027 if (!dp->ds->fdb_isolation)
1028 info.db.bridge.num = 0;
1030 return dsa_port_notify(dp, DSA_NOTIFIER_HOST_FDB_ADD, &info);
1033 int dsa_port_standalone_host_fdb_add(struct dsa_port *dp,
1034 const unsigned char *addr, u16 vid)
1036 struct dsa_db db = {
1037 .type = DSA_DB_PORT,
1041 return dsa_port_host_fdb_add(dp, addr, vid, db);
1044 int dsa_port_bridge_host_fdb_add(struct dsa_port *dp,
1045 const unsigned char *addr, u16 vid)
1047 struct net_device *master = dsa_port_to_master(dp);
1048 struct dsa_db db = {
1049 .type = DSA_DB_BRIDGE,
1050 .bridge = *dp->bridge,
1054 /* Avoid a call to __dev_set_promiscuity() on the master, which
1055 * requires rtnl_lock(), since we can't guarantee that is held here,
1056 * and we can't take it either.
1058 if (master->priv_flags & IFF_UNICAST_FLT) {
1059 err = dev_uc_add(master, addr);
1064 return dsa_port_host_fdb_add(dp, addr, vid, db);
1067 static int dsa_port_host_fdb_del(struct dsa_port *dp,
1068 const unsigned char *addr, u16 vid,
1071 struct dsa_notifier_fdb_info info = {
1078 if (!dp->ds->fdb_isolation)
1079 info.db.bridge.num = 0;
1081 return dsa_port_notify(dp, DSA_NOTIFIER_HOST_FDB_DEL, &info);
1084 int dsa_port_standalone_host_fdb_del(struct dsa_port *dp,
1085 const unsigned char *addr, u16 vid)
1087 struct dsa_db db = {
1088 .type = DSA_DB_PORT,
1092 return dsa_port_host_fdb_del(dp, addr, vid, db);
1095 int dsa_port_bridge_host_fdb_del(struct dsa_port *dp,
1096 const unsigned char *addr, u16 vid)
1098 struct net_device *master = dsa_port_to_master(dp);
1099 struct dsa_db db = {
1100 .type = DSA_DB_BRIDGE,
1101 .bridge = *dp->bridge,
1105 if (master->priv_flags & IFF_UNICAST_FLT) {
1106 err = dev_uc_del(master, addr);
1111 return dsa_port_host_fdb_del(dp, addr, vid, db);
1114 int dsa_port_lag_fdb_add(struct dsa_port *dp, const unsigned char *addr,
1117 struct dsa_notifier_lag_fdb_info info = {
1122 .type = DSA_DB_BRIDGE,
1123 .bridge = *dp->bridge,
1127 if (!dp->ds->fdb_isolation)
1128 info.db.bridge.num = 0;
1130 return dsa_port_notify(dp, DSA_NOTIFIER_LAG_FDB_ADD, &info);
1133 int dsa_port_lag_fdb_del(struct dsa_port *dp, const unsigned char *addr,
1136 struct dsa_notifier_lag_fdb_info info = {
1141 .type = DSA_DB_BRIDGE,
1142 .bridge = *dp->bridge,
1146 if (!dp->ds->fdb_isolation)
1147 info.db.bridge.num = 0;
1149 return dsa_port_notify(dp, DSA_NOTIFIER_LAG_FDB_DEL, &info);
1152 int dsa_port_fdb_dump(struct dsa_port *dp, dsa_fdb_dump_cb_t *cb, void *data)
1154 struct dsa_switch *ds = dp->ds;
1155 int port = dp->index;
1157 if (!ds->ops->port_fdb_dump)
1160 return ds->ops->port_fdb_dump(ds, port, cb, data);
1163 int dsa_port_mdb_add(const struct dsa_port *dp,
1164 const struct switchdev_obj_port_mdb *mdb)
1166 struct dsa_notifier_mdb_info info = {
1170 .type = DSA_DB_BRIDGE,
1171 .bridge = *dp->bridge,
1175 if (!dp->ds->fdb_isolation)
1176 info.db.bridge.num = 0;
1178 return dsa_port_notify(dp, DSA_NOTIFIER_MDB_ADD, &info);
1181 int dsa_port_mdb_del(const struct dsa_port *dp,
1182 const struct switchdev_obj_port_mdb *mdb)
1184 struct dsa_notifier_mdb_info info = {
1188 .type = DSA_DB_BRIDGE,
1189 .bridge = *dp->bridge,
1193 if (!dp->ds->fdb_isolation)
1194 info.db.bridge.num = 0;
1196 return dsa_port_notify(dp, DSA_NOTIFIER_MDB_DEL, &info);
1199 static int dsa_port_host_mdb_add(const struct dsa_port *dp,
1200 const struct switchdev_obj_port_mdb *mdb,
1203 struct dsa_notifier_mdb_info info = {
1209 if (!dp->ds->fdb_isolation)
1210 info.db.bridge.num = 0;
1212 return dsa_port_notify(dp, DSA_NOTIFIER_HOST_MDB_ADD, &info);
1215 int dsa_port_standalone_host_mdb_add(const struct dsa_port *dp,
1216 const struct switchdev_obj_port_mdb *mdb)
1218 struct dsa_db db = {
1219 .type = DSA_DB_PORT,
1223 return dsa_port_host_mdb_add(dp, mdb, db);
1226 int dsa_port_bridge_host_mdb_add(const struct dsa_port *dp,
1227 const struct switchdev_obj_port_mdb *mdb)
1229 struct net_device *master = dsa_port_to_master(dp);
1230 struct dsa_db db = {
1231 .type = DSA_DB_BRIDGE,
1232 .bridge = *dp->bridge,
1236 err = dev_mc_add(master, mdb->addr);
1240 return dsa_port_host_mdb_add(dp, mdb, db);
1243 static int dsa_port_host_mdb_del(const struct dsa_port *dp,
1244 const struct switchdev_obj_port_mdb *mdb,
1247 struct dsa_notifier_mdb_info info = {
1253 if (!dp->ds->fdb_isolation)
1254 info.db.bridge.num = 0;
1256 return dsa_port_notify(dp, DSA_NOTIFIER_HOST_MDB_DEL, &info);
1259 int dsa_port_standalone_host_mdb_del(const struct dsa_port *dp,
1260 const struct switchdev_obj_port_mdb *mdb)
1262 struct dsa_db db = {
1263 .type = DSA_DB_PORT,
1267 return dsa_port_host_mdb_del(dp, mdb, db);
1270 int dsa_port_bridge_host_mdb_del(const struct dsa_port *dp,
1271 const struct switchdev_obj_port_mdb *mdb)
1273 struct net_device *master = dsa_port_to_master(dp);
1274 struct dsa_db db = {
1275 .type = DSA_DB_BRIDGE,
1276 .bridge = *dp->bridge,
1280 err = dev_mc_del(master, mdb->addr);
1284 return dsa_port_host_mdb_del(dp, mdb, db);
1287 int dsa_port_vlan_add(struct dsa_port *dp,
1288 const struct switchdev_obj_port_vlan *vlan,
1289 struct netlink_ext_ack *extack)
1291 struct dsa_notifier_vlan_info info = {
1297 return dsa_port_notify(dp, DSA_NOTIFIER_VLAN_ADD, &info);
1300 int dsa_port_vlan_del(struct dsa_port *dp,
1301 const struct switchdev_obj_port_vlan *vlan)
1303 struct dsa_notifier_vlan_info info = {
1308 return dsa_port_notify(dp, DSA_NOTIFIER_VLAN_DEL, &info);
1311 int dsa_port_host_vlan_add(struct dsa_port *dp,
1312 const struct switchdev_obj_port_vlan *vlan,
1313 struct netlink_ext_ack *extack)
1315 struct net_device *master = dsa_port_to_master(dp);
1316 struct dsa_notifier_vlan_info info = {
1323 err = dsa_port_notify(dp, DSA_NOTIFIER_HOST_VLAN_ADD, &info);
1324 if (err && err != -EOPNOTSUPP)
1327 vlan_vid_add(master, htons(ETH_P_8021Q), vlan->vid);
1332 int dsa_port_host_vlan_del(struct dsa_port *dp,
1333 const struct switchdev_obj_port_vlan *vlan)
1335 struct net_device *master = dsa_port_to_master(dp);
1336 struct dsa_notifier_vlan_info info = {
1342 err = dsa_port_notify(dp, DSA_NOTIFIER_HOST_VLAN_DEL, &info);
1343 if (err && err != -EOPNOTSUPP)
1346 vlan_vid_del(master, htons(ETH_P_8021Q), vlan->vid);
1351 int dsa_port_mrp_add(const struct dsa_port *dp,
1352 const struct switchdev_obj_mrp *mrp)
1354 struct dsa_switch *ds = dp->ds;
1356 if (!ds->ops->port_mrp_add)
1359 return ds->ops->port_mrp_add(ds, dp->index, mrp);
1362 int dsa_port_mrp_del(const struct dsa_port *dp,
1363 const struct switchdev_obj_mrp *mrp)
1365 struct dsa_switch *ds = dp->ds;
1367 if (!ds->ops->port_mrp_del)
1370 return ds->ops->port_mrp_del(ds, dp->index, mrp);
1373 int dsa_port_mrp_add_ring_role(const struct dsa_port *dp,
1374 const struct switchdev_obj_ring_role_mrp *mrp)
1376 struct dsa_switch *ds = dp->ds;
1378 if (!ds->ops->port_mrp_add_ring_role)
1381 return ds->ops->port_mrp_add_ring_role(ds, dp->index, mrp);
1384 int dsa_port_mrp_del_ring_role(const struct dsa_port *dp,
1385 const struct switchdev_obj_ring_role_mrp *mrp)
1387 struct dsa_switch *ds = dp->ds;
1389 if (!ds->ops->port_mrp_del_ring_role)
1392 return ds->ops->port_mrp_del_ring_role(ds, dp->index, mrp);
1395 static int dsa_port_assign_master(struct dsa_port *dp,
1396 struct net_device *master,
1397 struct netlink_ext_ack *extack,
1400 struct dsa_switch *ds = dp->ds;
1401 int port = dp->index, err;
1403 err = ds->ops->port_change_master(ds, port, master, extack);
1404 if (err && !fail_on_err)
1405 dev_err(ds->dev, "port %d failed to assign master %s: %pe\n",
1406 port, master->name, ERR_PTR(err));
1408 if (err && fail_on_err)
1411 dp->cpu_dp = master->dsa_ptr;
1412 dp->cpu_port_in_lag = netif_is_lag_master(master);
1417 /* Change the dp->cpu_dp affinity for a user port. Note that both cross-chip
1418 * notifiers and drivers have implicit assumptions about user-to-CPU-port
1419 * mappings, so we unfortunately cannot delay the deletion of the objects
1420 * (switchdev, standalone addresses, standalone VLANs) on the old CPU port
1421 * until the new CPU port has been set up. So we need to completely tear down
1422 * the old CPU port before changing it, and restore it on errors during the
1423 * bringup of the new one.
1425 int dsa_port_change_master(struct dsa_port *dp, struct net_device *master,
1426 struct netlink_ext_ack *extack)
1428 struct net_device *bridge_dev = dsa_port_bridge_dev_get(dp);
1429 struct net_device *old_master = dsa_port_to_master(dp);
1430 struct net_device *dev = dp->slave;
1431 struct dsa_switch *ds = dp->ds;
1432 bool vlan_filtering;
1435 /* Bridges may hold host FDB, MDB and VLAN objects. These need to be
1436 * migrated, so dynamically unoffload and later reoffload the bridge
1440 dsa_port_pre_bridge_leave(dp, bridge_dev);
1441 dsa_port_bridge_leave(dp, bridge_dev);
1444 /* The port might still be VLAN filtering even if it's no longer
1445 * under a bridge, either due to ds->vlan_filtering_is_global or
1446 * ds->needs_standalone_vlan_filtering. In turn this means VLANs
1449 vlan_filtering = dsa_port_is_vlan_filtering(dp);
1450 if (vlan_filtering) {
1451 err = dsa_slave_manage_vlan_filtering(dev, false);
1453 NL_SET_ERR_MSG_MOD(extack,
1454 "Failed to remove standalone VLANs");
1455 goto rewind_old_bridge;
1459 /* Standalone addresses, and addresses of upper interfaces like
1460 * VLAN, LAG, HSR need to be migrated.
1462 dsa_slave_unsync_ha(dev);
1464 err = dsa_port_assign_master(dp, master, extack, true);
1466 goto rewind_old_addrs;
1468 dsa_slave_sync_ha(dev);
1470 if (vlan_filtering) {
1471 err = dsa_slave_manage_vlan_filtering(dev, true);
1473 NL_SET_ERR_MSG_MOD(extack,
1474 "Failed to restore standalone VLANs");
1475 goto rewind_new_addrs;
1480 err = dsa_port_bridge_join(dp, bridge_dev, extack);
1481 if (err && err == -EOPNOTSUPP) {
1482 NL_SET_ERR_MSG_MOD(extack,
1483 "Failed to reoffload bridge");
1484 goto rewind_new_vlan;
1492 dsa_slave_manage_vlan_filtering(dev, false);
1495 dsa_slave_unsync_ha(dev);
1497 dsa_port_assign_master(dp, old_master, NULL, false);
1499 /* Restore the objects on the old CPU port */
1501 dsa_slave_sync_ha(dev);
1503 if (vlan_filtering) {
1504 tmp = dsa_slave_manage_vlan_filtering(dev, true);
1507 "port %d failed to restore standalone VLANs: %pe\n",
1508 dp->index, ERR_PTR(tmp));
1514 tmp = dsa_port_bridge_join(dp, bridge_dev, extack);
1517 "port %d failed to rejoin bridge %s: %pe\n",
1518 dp->index, bridge_dev->name, ERR_PTR(tmp));
1525 void dsa_port_set_tag_protocol(struct dsa_port *cpu_dp,
1526 const struct dsa_device_ops *tag_ops)
1528 cpu_dp->rcv = tag_ops->rcv;
1529 cpu_dp->tag_ops = tag_ops;
1532 static struct phy_device *dsa_port_get_phy_device(struct dsa_port *dp)
1534 struct device_node *phy_dn;
1535 struct phy_device *phydev;
1537 phy_dn = of_parse_phandle(dp->dn, "phy-handle", 0);
1541 phydev = of_phy_find_device(phy_dn);
1543 of_node_put(phy_dn);
1544 return ERR_PTR(-EPROBE_DEFER);
1547 of_node_put(phy_dn);
1551 static void dsa_port_phylink_validate(struct phylink_config *config,
1552 unsigned long *supported,
1553 struct phylink_link_state *state)
1555 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
1556 struct dsa_switch *ds = dp->ds;
1558 if (!ds->ops->phylink_validate) {
1559 if (config->mac_capabilities)
1560 phylink_generic_validate(config, supported, state);
1564 ds->ops->phylink_validate(ds, dp->index, supported, state);
1567 static void dsa_port_phylink_mac_pcs_get_state(struct phylink_config *config,
1568 struct phylink_link_state *state)
1570 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
1571 struct dsa_switch *ds = dp->ds;
1574 /* Only called for inband modes */
1575 if (!ds->ops->phylink_mac_link_state) {
1580 err = ds->ops->phylink_mac_link_state(ds, dp->index, state);
1582 dev_err(ds->dev, "p%d: phylink_mac_link_state() failed: %d\n",
1588 static struct phylink_pcs *
1589 dsa_port_phylink_mac_select_pcs(struct phylink_config *config,
1590 phy_interface_t interface)
1592 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
1593 struct phylink_pcs *pcs = ERR_PTR(-EOPNOTSUPP);
1594 struct dsa_switch *ds = dp->ds;
1596 if (ds->ops->phylink_mac_select_pcs)
1597 pcs = ds->ops->phylink_mac_select_pcs(ds, dp->index, interface);
1602 static void dsa_port_phylink_mac_config(struct phylink_config *config,
1604 const struct phylink_link_state *state)
1606 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
1607 struct dsa_switch *ds = dp->ds;
1609 if (!ds->ops->phylink_mac_config)
1612 ds->ops->phylink_mac_config(ds, dp->index, mode, state);
1615 static void dsa_port_phylink_mac_an_restart(struct phylink_config *config)
1617 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
1618 struct dsa_switch *ds = dp->ds;
1620 if (!ds->ops->phylink_mac_an_restart)
1623 ds->ops->phylink_mac_an_restart(ds, dp->index);
1626 static void dsa_port_phylink_mac_link_down(struct phylink_config *config,
1628 phy_interface_t interface)
1630 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
1631 struct phy_device *phydev = NULL;
1632 struct dsa_switch *ds = dp->ds;
1634 if (dsa_port_is_user(dp))
1635 phydev = dp->slave->phydev;
1637 if (!ds->ops->phylink_mac_link_down) {
1638 if (ds->ops->adjust_link && phydev)
1639 ds->ops->adjust_link(ds, dp->index, phydev);
1643 ds->ops->phylink_mac_link_down(ds, dp->index, mode, interface);
1646 static void dsa_port_phylink_mac_link_up(struct phylink_config *config,
1647 struct phy_device *phydev,
1649 phy_interface_t interface,
1650 int speed, int duplex,
1651 bool tx_pause, bool rx_pause)
1653 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
1654 struct dsa_switch *ds = dp->ds;
1656 if (!ds->ops->phylink_mac_link_up) {
1657 if (ds->ops->adjust_link && phydev)
1658 ds->ops->adjust_link(ds, dp->index, phydev);
1662 ds->ops->phylink_mac_link_up(ds, dp->index, mode, interface, phydev,
1663 speed, duplex, tx_pause, rx_pause);
1666 static const struct phylink_mac_ops dsa_port_phylink_mac_ops = {
1667 .validate = dsa_port_phylink_validate,
1668 .mac_select_pcs = dsa_port_phylink_mac_select_pcs,
1669 .mac_pcs_get_state = dsa_port_phylink_mac_pcs_get_state,
1670 .mac_config = dsa_port_phylink_mac_config,
1671 .mac_an_restart = dsa_port_phylink_mac_an_restart,
1672 .mac_link_down = dsa_port_phylink_mac_link_down,
1673 .mac_link_up = dsa_port_phylink_mac_link_up,
1676 int dsa_port_phylink_create(struct dsa_port *dp)
1678 struct dsa_switch *ds = dp->ds;
1679 phy_interface_t mode;
1683 err = of_get_phy_mode(dp->dn, &mode);
1685 mode = PHY_INTERFACE_MODE_NA;
1687 /* Presence of phylink_mac_link_state or phylink_mac_an_restart is
1688 * an indicator of a legacy phylink driver.
1690 if (ds->ops->phylink_mac_link_state ||
1691 ds->ops->phylink_mac_an_restart)
1692 dp->pl_config.legacy_pre_march2020 = true;
1694 if (ds->ops->phylink_get_caps)
1695 ds->ops->phylink_get_caps(ds, dp->index, &dp->pl_config);
1697 pl = phylink_create(&dp->pl_config, of_fwnode_handle(dp->dn),
1698 mode, &dsa_port_phylink_mac_ops);
1700 pr_err("error creating PHYLINK: %ld\n", PTR_ERR(pl));
1709 void dsa_port_phylink_destroy(struct dsa_port *dp)
1711 phylink_destroy(dp->pl);
1715 static int dsa_shared_port_setup_phy_of(struct dsa_port *dp, bool enable)
1717 struct dsa_switch *ds = dp->ds;
1718 struct phy_device *phydev;
1719 int port = dp->index;
1722 phydev = dsa_port_get_phy_device(dp);
1727 return PTR_ERR(phydev);
1730 err = genphy_resume(phydev);
1734 err = genphy_read_status(phydev);
1738 err = genphy_suspend(phydev);
1743 if (ds->ops->adjust_link)
1744 ds->ops->adjust_link(ds, port, phydev);
1746 dev_dbg(ds->dev, "enabled port's phy: %s", phydev_name(phydev));
1749 put_device(&phydev->mdio.dev);
1753 static int dsa_shared_port_fixed_link_register_of(struct dsa_port *dp)
1755 struct device_node *dn = dp->dn;
1756 struct dsa_switch *ds = dp->ds;
1757 struct phy_device *phydev;
1758 int port = dp->index;
1759 phy_interface_t mode;
1762 err = of_phy_register_fixed_link(dn);
1765 "failed to register the fixed PHY of port %d\n",
1770 phydev = of_phy_find_device(dn);
1772 err = of_get_phy_mode(dn, &mode);
1774 mode = PHY_INTERFACE_MODE_NA;
1775 phydev->interface = mode;
1777 genphy_read_status(phydev);
1779 if (ds->ops->adjust_link)
1780 ds->ops->adjust_link(ds, port, phydev);
1782 put_device(&phydev->mdio.dev);
1787 static int dsa_shared_port_phylink_register(struct dsa_port *dp)
1789 struct dsa_switch *ds = dp->ds;
1790 struct device_node *port_dn = dp->dn;
1793 dp->pl_config.dev = ds->dev;
1794 dp->pl_config.type = PHYLINK_DEV;
1796 err = dsa_port_phylink_create(dp);
1800 err = phylink_of_phy_connect(dp->pl, port_dn, 0);
1801 if (err && err != -ENODEV) {
1802 pr_err("could not attach to PHY: %d\n", err);
1803 goto err_phy_connect;
1809 dsa_port_phylink_destroy(dp);
1813 /* During the initial DSA driver migration to OF, port nodes were sometimes
1814 * added to device trees with no indication of how they should operate from a
1815 * link management perspective (phy-handle, fixed-link, etc). Additionally, the
1816 * phy-mode may be absent. The interpretation of these port OF nodes depends on
1819 * User ports with no phy-handle or fixed-link are expected to connect to an
1820 * internal PHY located on the ds->slave_mii_bus at an MDIO address equal to
1821 * the port number. This description is still actively supported.
1823 * Shared (CPU and DSA) ports with no phy-handle or fixed-link are expected to
1824 * operate at the maximum speed that their phy-mode is capable of. If the
1825 * phy-mode is absent, they are expected to operate using the phy-mode
1826 * supported by the port that gives the highest link speed. It is unspecified
1827 * if the port should use flow control or not, half duplex or full duplex, or
1828 * if the phy-mode is a SERDES link, whether in-band autoneg is expected to be
1831 * In the latter case of shared ports, omitting the link management description
1832 * from the firmware node is deprecated and strongly discouraged. DSA uses
1833 * phylink, which rejects the firmware nodes of these ports for lacking
1834 * required properties.
1836 * For switches in this table, DSA will skip enforcing validation and will
1837 * later omit registering a phylink instance for the shared ports, if they lack
1838 * a fixed-link, a phy-handle, or a managed = "in-band-status" property.
1839 * It becomes the responsibility of the driver to ensure that these ports
1840 * operate at the maximum speed (whatever this means) and will interoperate
1841 * with the DSA master or other cascade port, since phylink methods will not be
1844 * If you are considering expanding this table for newly introduced switches,
1845 * think again. It is OK to remove switches from this table if there aren't DT
1846 * blobs in circulation which rely on defaulting the shared ports.
1848 static const char * const dsa_switches_apply_workarounds[] = {
1849 #if IS_ENABLED(CONFIG_NET_DSA_XRS700X)
1855 #if IS_ENABLED(CONFIG_B53)
1865 "brcm,bcm53010-srab",
1866 "brcm,bcm53011-srab",
1867 "brcm,bcm53012-srab",
1868 "brcm,bcm53018-srab",
1869 "brcm,bcm53019-srab",
1870 "brcm,bcm5301x-srab",
1871 "brcm,bcm11360-srab",
1872 "brcm,bcm58522-srab",
1873 "brcm,bcm58525-srab",
1874 "brcm,bcm58535-srab",
1875 "brcm,bcm58622-srab",
1876 "brcm,bcm58623-srab",
1877 "brcm,bcm58625-srab",
1878 "brcm,bcm88312-srab",
1882 "brcm,bcm3384-switch",
1883 "brcm,bcm6328-switch",
1884 "brcm,bcm6368-switch",
1885 "brcm,bcm63xx-switch",
1887 #if IS_ENABLED(CONFIG_NET_DSA_BCM_SF2)
1888 "brcm,bcm7445-switch-v4.0",
1889 "brcm,bcm7278-switch-v4.0",
1890 "brcm,bcm7278-switch-v4.8",
1892 #if IS_ENABLED(CONFIG_NET_DSA_LANTIQ_GSWIP)
1893 "lantiq,xrx200-gswip",
1894 "lantiq,xrx300-gswip",
1895 "lantiq,xrx330-gswip",
1897 #if IS_ENABLED(CONFIG_NET_DSA_MV88E6060)
1898 "marvell,mv88e6060",
1900 #if IS_ENABLED(CONFIG_NET_DSA_MV88E6XXX)
1901 "marvell,mv88e6085",
1902 "marvell,mv88e6190",
1903 "marvell,mv88e6250",
1905 #if IS_ENABLED(CONFIG_NET_DSA_MICROCHIP_KSZ_COMMON)
1906 "microchip,ksz8765",
1907 "microchip,ksz8794",
1908 "microchip,ksz8795",
1909 "microchip,ksz8863",
1910 "microchip,ksz8873",
1911 "microchip,ksz9477",
1912 "microchip,ksz9897",
1913 "microchip,ksz9893",
1914 "microchip,ksz9563",
1915 "microchip,ksz8563",
1916 "microchip,ksz9567",
1918 #if IS_ENABLED(CONFIG_NET_DSA_SMSC_LAN9303_MDIO)
1919 "smsc,lan9303-mdio",
1921 #if IS_ENABLED(CONFIG_NET_DSA_SMSC_LAN9303_I2C)
1927 static void dsa_shared_port_validate_of(struct dsa_port *dp,
1928 bool *missing_phy_mode,
1929 bool *missing_link_description)
1931 struct device_node *dn = dp->dn, *phy_np;
1932 struct dsa_switch *ds = dp->ds;
1933 phy_interface_t mode;
1935 *missing_phy_mode = false;
1936 *missing_link_description = false;
1938 if (of_get_phy_mode(dn, &mode)) {
1939 *missing_phy_mode = true;
1941 "OF node %pOF of %s port %d lacks the required \"phy-mode\" property\n",
1942 dn, dsa_port_is_cpu(dp) ? "CPU" : "DSA", dp->index);
1945 /* Note: of_phy_is_fixed_link() also returns true for
1946 * managed = "in-band-status"
1948 if (of_phy_is_fixed_link(dn))
1951 phy_np = of_parse_phandle(dn, "phy-handle", 0);
1953 of_node_put(phy_np);
1957 *missing_link_description = true;
1960 "OF node %pOF of %s port %d lacks the required \"phy-handle\", \"fixed-link\" or \"managed\" properties\n",
1961 dn, dsa_port_is_cpu(dp) ? "CPU" : "DSA", dp->index);
1964 int dsa_shared_port_link_register_of(struct dsa_port *dp)
1966 struct dsa_switch *ds = dp->ds;
1967 bool missing_link_description;
1968 bool missing_phy_mode;
1969 int port = dp->index;
1971 dsa_shared_port_validate_of(dp, &missing_phy_mode,
1972 &missing_link_description);
1974 if ((missing_phy_mode || missing_link_description) &&
1975 !of_device_compatible_match(ds->dev->of_node,
1976 dsa_switches_apply_workarounds))
1979 if (!ds->ops->adjust_link) {
1980 if (missing_link_description) {
1982 "Skipping phylink registration for %s port %d\n",
1983 dsa_port_is_cpu(dp) ? "CPU" : "DSA", dp->index);
1985 if (ds->ops->phylink_mac_link_down)
1986 ds->ops->phylink_mac_link_down(ds, port,
1987 MLO_AN_FIXED, PHY_INTERFACE_MODE_NA);
1989 return dsa_shared_port_phylink_register(dp);
1995 "Using legacy PHYLIB callbacks. Please migrate to PHYLINK!\n");
1997 if (of_phy_is_fixed_link(dp->dn))
1998 return dsa_shared_port_fixed_link_register_of(dp);
2000 return dsa_shared_port_setup_phy_of(dp, true);
2003 void dsa_shared_port_link_unregister_of(struct dsa_port *dp)
2005 struct dsa_switch *ds = dp->ds;
2007 if (!ds->ops->adjust_link && dp->pl) {
2009 phylink_disconnect_phy(dp->pl);
2011 dsa_port_phylink_destroy(dp);
2015 if (of_phy_is_fixed_link(dp->dn))
2016 of_phy_deregister_fixed_link(dp->dn);
2018 dsa_shared_port_setup_phy_of(dp, false);
2021 int dsa_port_hsr_join(struct dsa_port *dp, struct net_device *hsr)
2023 struct dsa_switch *ds = dp->ds;
2026 if (!ds->ops->port_hsr_join)
2031 err = ds->ops->port_hsr_join(ds, dp->index, hsr);
2038 void dsa_port_hsr_leave(struct dsa_port *dp, struct net_device *hsr)
2040 struct dsa_switch *ds = dp->ds;
2045 if (ds->ops->port_hsr_leave) {
2046 err = ds->ops->port_hsr_leave(ds, dp->index, hsr);
2048 dev_err(dp->ds->dev,
2049 "port %d failed to leave HSR %s: %pe\n",
2050 dp->index, hsr->name, ERR_PTR(err));
2054 int dsa_port_tag_8021q_vlan_add(struct dsa_port *dp, u16 vid, bool broadcast)
2056 struct dsa_notifier_tag_8021q_vlan_info info = {
2062 return dsa_broadcast(DSA_NOTIFIER_TAG_8021Q_VLAN_ADD, &info);
2064 return dsa_port_notify(dp, DSA_NOTIFIER_TAG_8021Q_VLAN_ADD, &info);
2067 void dsa_port_tag_8021q_vlan_del(struct dsa_port *dp, u16 vid, bool broadcast)
2069 struct dsa_notifier_tag_8021q_vlan_info info = {
2076 err = dsa_broadcast(DSA_NOTIFIER_TAG_8021Q_VLAN_DEL, &info);
2078 err = dsa_port_notify(dp, DSA_NOTIFIER_TAG_8021Q_VLAN_DEL, &info);
2080 dev_err(dp->ds->dev,
2081 "port %d failed to notify tag_8021q VLAN %d deletion: %pe\n",
2082 dp->index, vid, ERR_PTR(err));