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)
35 struct net_device *brport_dev = dsa_port_to_bridge_port(dp);
36 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);
60 dsa_port_notify_bridge_fdb_flush(dp);
63 static bool dsa_port_can_configure_learning(struct dsa_port *dp)
65 struct switchdev_brport_flags flags = {
68 struct dsa_switch *ds = dp->ds;
71 if (!ds->ops->port_bridge_flags || !ds->ops->port_pre_bridge_flags)
74 err = ds->ops->port_pre_bridge_flags(ds, dp->index, flags, NULL);
78 int dsa_port_set_state(struct dsa_port *dp, u8 state, bool do_fast_age)
80 struct dsa_switch *ds = dp->ds;
83 if (!ds->ops->port_stp_state_set)
86 ds->ops->port_stp_state_set(ds, port, state);
88 if (!dsa_port_can_configure_learning(dp) ||
89 (do_fast_age && dp->learning)) {
90 /* Fast age FDB entries or flush appropriate forwarding database
91 * for the given port, if we are moving it from Learning or
92 * Forwarding state, to Disabled or Blocking or Listening state.
93 * Ports that were standalone before the STP state change don't
94 * need to fast age the FDB, since address learning is off in
98 if ((dp->stp_state == BR_STATE_LEARNING ||
99 dp->stp_state == BR_STATE_FORWARDING) &&
100 (state == BR_STATE_DISABLED ||
101 state == BR_STATE_BLOCKING ||
102 state == BR_STATE_LISTENING))
103 dsa_port_fast_age(dp);
106 dp->stp_state = state;
111 static void dsa_port_set_state_now(struct dsa_port *dp, u8 state,
116 err = dsa_port_set_state(dp, state, do_fast_age);
118 pr_err("DSA: failed to set STP state %u (%d)\n", state, err);
121 int dsa_port_enable_rt(struct dsa_port *dp, struct phy_device *phy)
123 struct dsa_switch *ds = dp->ds;
124 int port = dp->index;
127 if (ds->ops->port_enable) {
128 err = ds->ops->port_enable(ds, port, phy);
134 dsa_port_set_state_now(dp, BR_STATE_FORWARDING, false);
137 phylink_start(dp->pl);
142 int dsa_port_enable(struct dsa_port *dp, struct phy_device *phy)
147 err = dsa_port_enable_rt(dp, phy);
153 void dsa_port_disable_rt(struct dsa_port *dp)
155 struct dsa_switch *ds = dp->ds;
156 int port = dp->index;
159 phylink_stop(dp->pl);
162 dsa_port_set_state_now(dp, BR_STATE_DISABLED, false);
164 if (ds->ops->port_disable)
165 ds->ops->port_disable(ds, port);
168 void dsa_port_disable(struct dsa_port *dp)
171 dsa_port_disable_rt(dp);
175 static int dsa_port_inherit_brport_flags(struct dsa_port *dp,
176 struct netlink_ext_ack *extack)
178 const unsigned long mask = BR_LEARNING | BR_FLOOD | BR_MCAST_FLOOD |
180 struct net_device *brport_dev = dsa_port_to_bridge_port(dp);
183 for_each_set_bit(flag, &mask, 32) {
184 struct switchdev_brport_flags flags = {0};
186 flags.mask = BIT(flag);
188 if (br_port_flag_is_set(brport_dev, BIT(flag)))
189 flags.val = BIT(flag);
191 err = dsa_port_bridge_flags(dp, flags, extack);
192 if (err && err != -EOPNOTSUPP)
199 static void dsa_port_clear_brport_flags(struct dsa_port *dp)
201 const unsigned long val = BR_FLOOD | BR_MCAST_FLOOD | BR_BCAST_FLOOD;
202 const unsigned long mask = BR_LEARNING | BR_FLOOD | BR_MCAST_FLOOD |
206 for_each_set_bit(flag, &mask, 32) {
207 struct switchdev_brport_flags flags = {0};
209 flags.mask = BIT(flag);
210 flags.val = val & BIT(flag);
212 err = dsa_port_bridge_flags(dp, flags, NULL);
213 if (err && err != -EOPNOTSUPP)
215 "failed to clear bridge port flag %lu: %pe\n",
216 flags.val, ERR_PTR(err));
220 static int dsa_port_switchdev_sync_attrs(struct dsa_port *dp,
221 struct netlink_ext_ack *extack)
223 struct net_device *brport_dev = dsa_port_to_bridge_port(dp);
224 struct net_device *br = dsa_port_bridge_dev_get(dp);
227 err = dsa_port_inherit_brport_flags(dp, extack);
231 err = dsa_port_set_state(dp, br_port_get_stp_state(brport_dev), false);
232 if (err && err != -EOPNOTSUPP)
235 err = dsa_port_vlan_filtering(dp, br_vlan_enabled(br), extack);
236 if (err && err != -EOPNOTSUPP)
239 err = dsa_port_ageing_time(dp, br_get_ageing_time(br));
240 if (err && err != -EOPNOTSUPP)
246 static void dsa_port_switchdev_unsync_attrs(struct dsa_port *dp)
248 /* Configure the port for standalone mode (no address learning,
250 * The bridge only emits SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS events
251 * when the user requests it through netlink or sysfs, but not
252 * automatically at port join or leave, so we need to handle resetting
253 * the brport flags ourselves. But we even prefer it that way, because
254 * otherwise, some setups might never get the notification they need,
255 * for example, when a port leaves a LAG that offloads the bridge,
256 * it becomes standalone, but as far as the bridge is concerned, no
259 dsa_port_clear_brport_flags(dp);
261 /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
262 * so allow it to be in BR_STATE_FORWARDING to be kept functional
264 dsa_port_set_state_now(dp, BR_STATE_FORWARDING, true);
266 /* VLAN filtering is handled by dsa_switch_bridge_leave */
268 /* Ageing time may be global to the switch chip, so don't change it
269 * here because we have no good reason (or value) to change it to.
273 static int dsa_port_bridge_create(struct dsa_port *dp,
274 struct net_device *br,
275 struct netlink_ext_ack *extack)
277 struct dsa_switch *ds = dp->ds;
278 struct dsa_bridge *bridge;
280 bridge = dsa_tree_bridge_find(ds->dst, br);
282 refcount_inc(&bridge->refcount);
287 bridge = kzalloc(sizeof(*bridge), GFP_KERNEL);
291 refcount_set(&bridge->refcount, 1);
295 bridge->num = dsa_bridge_num_get(br, ds->max_num_bridges);
296 if (ds->max_num_bridges && !bridge->num) {
297 NL_SET_ERR_MSG_MOD(extack,
298 "Range of offloadable bridges exceeded");
308 static void dsa_port_bridge_destroy(struct dsa_port *dp,
309 const struct net_device *br)
311 struct dsa_bridge *bridge = dp->bridge;
315 if (!refcount_dec_and_test(&bridge->refcount))
319 dsa_bridge_num_put(br, bridge->num);
324 int dsa_port_bridge_join(struct dsa_port *dp, struct net_device *br,
325 struct netlink_ext_ack *extack)
327 struct dsa_notifier_bridge_info info = {
328 .tree_index = dp->ds->dst->index,
329 .sw_index = dp->ds->index,
332 struct net_device *dev = dp->slave;
333 struct net_device *brport_dev;
336 /* Here the interface is already bridged. Reflect the current
337 * configuration so that drivers can program their chips accordingly.
339 err = dsa_port_bridge_create(dp, br, extack);
343 brport_dev = dsa_port_to_bridge_port(dp);
345 info.bridge = *dp->bridge;
346 err = dsa_broadcast(DSA_NOTIFIER_BRIDGE_JOIN, &info);
350 /* Drivers which support bridge TX forwarding should set this */
351 dp->bridge->tx_fwd_offload = info.tx_fwd_offload;
353 err = switchdev_bridge_port_offload(brport_dev, dev, dp,
354 &dsa_slave_switchdev_notifier,
355 &dsa_slave_switchdev_blocking_notifier,
356 dp->bridge->tx_fwd_offload, extack);
358 goto out_rollback_unbridge;
360 err = dsa_port_switchdev_sync_attrs(dp, extack);
362 goto out_rollback_unoffload;
366 out_rollback_unoffload:
367 switchdev_bridge_port_unoffload(brport_dev, dp,
368 &dsa_slave_switchdev_notifier,
369 &dsa_slave_switchdev_blocking_notifier);
370 out_rollback_unbridge:
371 dsa_broadcast(DSA_NOTIFIER_BRIDGE_LEAVE, &info);
373 dsa_port_bridge_destroy(dp, br);
377 void dsa_port_pre_bridge_leave(struct dsa_port *dp, struct net_device *br)
379 struct net_device *brport_dev = dsa_port_to_bridge_port(dp);
381 /* Don't try to unoffload something that is not offloaded */
385 switchdev_bridge_port_unoffload(brport_dev, dp,
386 &dsa_slave_switchdev_notifier,
387 &dsa_slave_switchdev_blocking_notifier);
389 dsa_flush_workqueue();
392 void dsa_port_bridge_leave(struct dsa_port *dp, struct net_device *br)
394 struct dsa_notifier_bridge_info info = {
395 .tree_index = dp->ds->dst->index,
396 .sw_index = dp->ds->index,
398 .bridge = *dp->bridge,
402 /* Here the port is already unbridged. Reflect the current configuration
403 * so that drivers can program their chips accordingly.
405 dsa_port_bridge_destroy(dp, br);
407 err = dsa_broadcast(DSA_NOTIFIER_BRIDGE_LEAVE, &info);
410 "port %d failed to notify DSA_NOTIFIER_BRIDGE_LEAVE: %pe\n",
411 dp->index, ERR_PTR(err));
413 dsa_port_switchdev_unsync_attrs(dp);
416 int dsa_port_lag_change(struct dsa_port *dp,
417 struct netdev_lag_lower_state_info *linfo)
419 struct dsa_notifier_lag_info info = {
420 .sw_index = dp->ds->index,
428 /* On statically configured aggregates (e.g. loadbalance
429 * without LACP) ports will always be tx_enabled, even if the
430 * link is down. Thus we require both link_up and tx_enabled
431 * in order to include it in the tx set.
433 tx_enabled = linfo->link_up && linfo->tx_enabled;
435 if (tx_enabled == dp->lag_tx_enabled)
438 dp->lag_tx_enabled = tx_enabled;
440 return dsa_port_notify(dp, DSA_NOTIFIER_LAG_CHANGE, &info);
443 int dsa_port_lag_join(struct dsa_port *dp, struct net_device *lag,
444 struct netdev_lag_upper_info *uinfo,
445 struct netlink_ext_ack *extack)
447 struct dsa_notifier_lag_info info = {
448 .sw_index = dp->ds->index,
453 struct net_device *bridge_dev;
456 dsa_lag_map(dp->ds->dst, lag);
459 err = dsa_port_notify(dp, DSA_NOTIFIER_LAG_JOIN, &info);
463 bridge_dev = netdev_master_upper_dev_get(lag);
464 if (!bridge_dev || !netif_is_bridge_master(bridge_dev))
467 err = dsa_port_bridge_join(dp, bridge_dev, extack);
469 goto err_bridge_join;
474 dsa_port_notify(dp, DSA_NOTIFIER_LAG_LEAVE, &info);
477 dsa_lag_unmap(dp->ds->dst, lag);
481 void dsa_port_pre_lag_leave(struct dsa_port *dp, struct net_device *lag)
483 struct net_device *br = dsa_port_bridge_dev_get(dp);
486 dsa_port_pre_bridge_leave(dp, br);
489 void dsa_port_lag_leave(struct dsa_port *dp, struct net_device *lag)
491 struct net_device *br = dsa_port_bridge_dev_get(dp);
492 struct dsa_notifier_lag_info info = {
493 .sw_index = dp->ds->index,
502 /* Port might have been part of a LAG that in turn was
503 * attached to a bridge.
506 dsa_port_bridge_leave(dp, br);
508 dp->lag_tx_enabled = false;
511 err = dsa_port_notify(dp, DSA_NOTIFIER_LAG_LEAVE, &info);
514 "port %d failed to notify DSA_NOTIFIER_LAG_LEAVE: %pe\n",
515 dp->index, ERR_PTR(err));
517 dsa_lag_unmap(dp->ds->dst, lag);
520 /* Must be called under rcu_read_lock() */
521 static bool dsa_port_can_apply_vlan_filtering(struct dsa_port *dp,
523 struct netlink_ext_ack *extack)
525 struct dsa_switch *ds = dp->ds;
526 struct dsa_port *other_dp;
529 /* VLAN awareness was off, so the question is "can we turn it on".
530 * We may have had 8021q uppers, those need to go. Make sure we don't
531 * enter an inconsistent state: deny changing the VLAN awareness state
532 * as long as we have 8021q uppers.
534 if (vlan_filtering && dsa_port_is_user(dp)) {
535 struct net_device *br = dsa_port_bridge_dev_get(dp);
536 struct net_device *upper_dev, *slave = dp->slave;
537 struct list_head *iter;
539 netdev_for_each_upper_dev_rcu(slave, upper_dev, iter) {
540 struct bridge_vlan_info br_info;
543 if (!is_vlan_dev(upper_dev))
546 vid = vlan_dev_vlan_id(upper_dev);
548 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the
549 * device, respectively the VID is not found, returning
550 * 0 means success, which is a failure for us here.
552 err = br_vlan_get_info(br, vid, &br_info);
554 NL_SET_ERR_MSG_MOD(extack,
555 "Must first remove VLAN uppers having VIDs also present in bridge");
561 if (!ds->vlan_filtering_is_global)
564 /* For cases where enabling/disabling VLAN awareness is global to the
565 * switch, we need to handle the case where multiple bridges span
566 * different ports of the same switch device and one of them has a
567 * different setting than what is being requested.
569 dsa_switch_for_each_port(other_dp, ds) {
570 struct net_device *other_br = dsa_port_bridge_dev_get(other_dp);
572 /* If it's the same bridge, it also has same
573 * vlan_filtering setting => no need to check
575 if (!other_br || other_br == dsa_port_bridge_dev_get(dp))
578 if (br_vlan_enabled(other_br) != vlan_filtering) {
579 NL_SET_ERR_MSG_MOD(extack,
580 "VLAN filtering is a global setting");
587 int dsa_port_vlan_filtering(struct dsa_port *dp, bool vlan_filtering,
588 struct netlink_ext_ack *extack)
590 bool old_vlan_filtering = dsa_port_is_vlan_filtering(dp);
591 struct dsa_switch *ds = dp->ds;
595 if (!ds->ops->port_vlan_filtering)
598 /* We are called from dsa_slave_switchdev_blocking_event(),
599 * which is not under rcu_read_lock(), unlike
600 * dsa_slave_switchdev_event().
603 apply = dsa_port_can_apply_vlan_filtering(dp, vlan_filtering, extack);
608 if (dsa_port_is_vlan_filtering(dp) == vlan_filtering)
611 err = ds->ops->port_vlan_filtering(ds, dp->index, vlan_filtering,
616 if (ds->vlan_filtering_is_global) {
617 struct dsa_port *other_dp;
619 ds->vlan_filtering = vlan_filtering;
621 dsa_switch_for_each_user_port(other_dp, ds) {
622 struct net_device *slave = dp->slave;
624 /* We might be called in the unbind path, so not
625 * all slave devices might still be registered.
630 err = dsa_slave_manage_vlan_filtering(slave,
636 dp->vlan_filtering = vlan_filtering;
638 err = dsa_slave_manage_vlan_filtering(dp->slave,
647 ds->ops->port_vlan_filtering(ds, dp->index, old_vlan_filtering, NULL);
649 if (ds->vlan_filtering_is_global)
650 ds->vlan_filtering = old_vlan_filtering;
652 dp->vlan_filtering = old_vlan_filtering;
657 /* This enforces legacy behavior for switch drivers which assume they can't
658 * receive VLAN configuration when enslaved to a bridge with vlan_filtering=0
660 bool dsa_port_skip_vlan_configuration(struct dsa_port *dp)
662 struct net_device *br = dsa_port_bridge_dev_get(dp);
663 struct dsa_switch *ds = dp->ds;
668 return !ds->configure_vlan_while_not_filtering && !br_vlan_enabled(br);
671 int dsa_port_ageing_time(struct dsa_port *dp, clock_t ageing_clock)
673 unsigned long ageing_jiffies = clock_t_to_jiffies(ageing_clock);
674 unsigned int ageing_time = jiffies_to_msecs(ageing_jiffies);
675 struct dsa_notifier_ageing_time_info info;
678 info.ageing_time = ageing_time;
680 err = dsa_port_notify(dp, DSA_NOTIFIER_AGEING_TIME, &info);
684 dp->ageing_time = ageing_time;
689 int dsa_port_pre_bridge_flags(const struct dsa_port *dp,
690 struct switchdev_brport_flags flags,
691 struct netlink_ext_ack *extack)
693 struct dsa_switch *ds = dp->ds;
695 if (!ds->ops->port_pre_bridge_flags)
698 return ds->ops->port_pre_bridge_flags(ds, dp->index, flags, extack);
701 int dsa_port_bridge_flags(struct dsa_port *dp,
702 struct switchdev_brport_flags flags,
703 struct netlink_ext_ack *extack)
705 struct dsa_switch *ds = dp->ds;
708 if (!ds->ops->port_bridge_flags)
711 err = ds->ops->port_bridge_flags(ds, dp->index, flags, extack);
715 if (flags.mask & BR_LEARNING) {
716 bool learning = flags.val & BR_LEARNING;
718 if (learning == dp->learning)
721 if ((dp->learning && !learning) &&
722 (dp->stp_state == BR_STATE_LEARNING ||
723 dp->stp_state == BR_STATE_FORWARDING))
724 dsa_port_fast_age(dp);
726 dp->learning = learning;
732 int dsa_port_mtu_change(struct dsa_port *dp, int new_mtu,
735 struct dsa_notifier_mtu_info info = {
736 .sw_index = dp->ds->index,
737 .targeted_match = targeted_match,
742 return dsa_port_notify(dp, DSA_NOTIFIER_MTU, &info);
745 int dsa_port_fdb_add(struct dsa_port *dp, const unsigned char *addr,
748 struct dsa_notifier_fdb_info info = {
749 .sw_index = dp->ds->index,
755 return dsa_port_notify(dp, DSA_NOTIFIER_FDB_ADD, &info);
758 int dsa_port_fdb_del(struct dsa_port *dp, const unsigned char *addr,
761 struct dsa_notifier_fdb_info info = {
762 .sw_index = dp->ds->index,
769 return dsa_port_notify(dp, DSA_NOTIFIER_FDB_DEL, &info);
772 int dsa_port_host_fdb_add(struct dsa_port *dp, const unsigned char *addr,
775 struct dsa_notifier_fdb_info info = {
776 .sw_index = dp->ds->index,
781 struct dsa_port *cpu_dp = dp->cpu_dp;
784 err = dev_uc_add(cpu_dp->master, addr);
788 return dsa_port_notify(dp, DSA_NOTIFIER_HOST_FDB_ADD, &info);
791 int dsa_port_host_fdb_del(struct dsa_port *dp, const unsigned char *addr,
794 struct dsa_notifier_fdb_info info = {
795 .sw_index = dp->ds->index,
800 struct dsa_port *cpu_dp = dp->cpu_dp;
803 err = dev_uc_del(cpu_dp->master, addr);
807 return dsa_port_notify(dp, DSA_NOTIFIER_HOST_FDB_DEL, &info);
810 int dsa_port_fdb_dump(struct dsa_port *dp, dsa_fdb_dump_cb_t *cb, void *data)
812 struct dsa_switch *ds = dp->ds;
813 int port = dp->index;
815 if (!ds->ops->port_fdb_dump)
818 return ds->ops->port_fdb_dump(ds, port, cb, data);
821 int dsa_port_mdb_add(const struct dsa_port *dp,
822 const struct switchdev_obj_port_mdb *mdb)
824 struct dsa_notifier_mdb_info info = {
825 .sw_index = dp->ds->index,
830 return dsa_port_notify(dp, DSA_NOTIFIER_MDB_ADD, &info);
833 int dsa_port_mdb_del(const struct dsa_port *dp,
834 const struct switchdev_obj_port_mdb *mdb)
836 struct dsa_notifier_mdb_info info = {
837 .sw_index = dp->ds->index,
842 return dsa_port_notify(dp, DSA_NOTIFIER_MDB_DEL, &info);
845 int dsa_port_host_mdb_add(const struct dsa_port *dp,
846 const struct switchdev_obj_port_mdb *mdb)
848 struct dsa_notifier_mdb_info info = {
849 .sw_index = dp->ds->index,
853 struct dsa_port *cpu_dp = dp->cpu_dp;
856 err = dev_mc_add(cpu_dp->master, mdb->addr);
860 return dsa_port_notify(dp, DSA_NOTIFIER_HOST_MDB_ADD, &info);
863 int dsa_port_host_mdb_del(const struct dsa_port *dp,
864 const struct switchdev_obj_port_mdb *mdb)
866 struct dsa_notifier_mdb_info info = {
867 .sw_index = dp->ds->index,
871 struct dsa_port *cpu_dp = dp->cpu_dp;
874 err = dev_mc_del(cpu_dp->master, mdb->addr);
878 return dsa_port_notify(dp, DSA_NOTIFIER_HOST_MDB_DEL, &info);
881 int dsa_port_vlan_add(struct dsa_port *dp,
882 const struct switchdev_obj_port_vlan *vlan,
883 struct netlink_ext_ack *extack)
885 struct dsa_notifier_vlan_info info = {
886 .sw_index = dp->ds->index,
892 return dsa_port_notify(dp, DSA_NOTIFIER_VLAN_ADD, &info);
895 int dsa_port_vlan_del(struct dsa_port *dp,
896 const struct switchdev_obj_port_vlan *vlan)
898 struct dsa_notifier_vlan_info info = {
899 .sw_index = dp->ds->index,
904 return dsa_port_notify(dp, DSA_NOTIFIER_VLAN_DEL, &info);
907 int dsa_port_mrp_add(const struct dsa_port *dp,
908 const struct switchdev_obj_mrp *mrp)
910 struct dsa_switch *ds = dp->ds;
912 if (!ds->ops->port_mrp_add)
915 return ds->ops->port_mrp_add(ds, dp->index, mrp);
918 int dsa_port_mrp_del(const struct dsa_port *dp,
919 const struct switchdev_obj_mrp *mrp)
921 struct dsa_switch *ds = dp->ds;
923 if (!ds->ops->port_mrp_del)
926 return ds->ops->port_mrp_del(ds, dp->index, mrp);
929 int dsa_port_mrp_add_ring_role(const struct dsa_port *dp,
930 const struct switchdev_obj_ring_role_mrp *mrp)
932 struct dsa_switch *ds = dp->ds;
934 if (!ds->ops->port_mrp_add_ring_role)
937 return ds->ops->port_mrp_add_ring_role(ds, dp->index, mrp);
940 int dsa_port_mrp_del_ring_role(const struct dsa_port *dp,
941 const struct switchdev_obj_ring_role_mrp *mrp)
943 struct dsa_switch *ds = dp->ds;
945 if (!ds->ops->port_mrp_del_ring_role)
948 return ds->ops->port_mrp_del_ring_role(ds, dp->index, mrp);
951 void dsa_port_set_tag_protocol(struct dsa_port *cpu_dp,
952 const struct dsa_device_ops *tag_ops)
954 cpu_dp->rcv = tag_ops->rcv;
955 cpu_dp->tag_ops = tag_ops;
958 static struct phy_device *dsa_port_get_phy_device(struct dsa_port *dp)
960 struct device_node *phy_dn;
961 struct phy_device *phydev;
963 phy_dn = of_parse_phandle(dp->dn, "phy-handle", 0);
967 phydev = of_phy_find_device(phy_dn);
970 return ERR_PTR(-EPROBE_DEFER);
977 static void dsa_port_phylink_validate(struct phylink_config *config,
978 unsigned long *supported,
979 struct phylink_link_state *state)
981 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
982 struct dsa_switch *ds = dp->ds;
984 if (!ds->ops->phylink_validate) {
985 if (config->mac_capabilities)
986 phylink_generic_validate(config, supported, state);
990 ds->ops->phylink_validate(ds, dp->index, supported, state);
993 static void dsa_port_phylink_mac_pcs_get_state(struct phylink_config *config,
994 struct phylink_link_state *state)
996 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
997 struct dsa_switch *ds = dp->ds;
1000 /* Only called for inband modes */
1001 if (!ds->ops->phylink_mac_link_state) {
1006 err = ds->ops->phylink_mac_link_state(ds, dp->index, state);
1008 dev_err(ds->dev, "p%d: phylink_mac_link_state() failed: %d\n",
1014 static void dsa_port_phylink_mac_config(struct phylink_config *config,
1016 const struct phylink_link_state *state)
1018 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
1019 struct dsa_switch *ds = dp->ds;
1021 if (!ds->ops->phylink_mac_config)
1024 ds->ops->phylink_mac_config(ds, dp->index, mode, state);
1027 static void dsa_port_phylink_mac_an_restart(struct phylink_config *config)
1029 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
1030 struct dsa_switch *ds = dp->ds;
1032 if (!ds->ops->phylink_mac_an_restart)
1035 ds->ops->phylink_mac_an_restart(ds, dp->index);
1038 static void dsa_port_phylink_mac_link_down(struct phylink_config *config,
1040 phy_interface_t interface)
1042 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
1043 struct phy_device *phydev = NULL;
1044 struct dsa_switch *ds = dp->ds;
1046 if (dsa_port_is_user(dp))
1047 phydev = dp->slave->phydev;
1049 if (!ds->ops->phylink_mac_link_down) {
1050 if (ds->ops->adjust_link && phydev)
1051 ds->ops->adjust_link(ds, dp->index, phydev);
1055 ds->ops->phylink_mac_link_down(ds, dp->index, mode, interface);
1058 static void dsa_port_phylink_mac_link_up(struct phylink_config *config,
1059 struct phy_device *phydev,
1061 phy_interface_t interface,
1062 int speed, int duplex,
1063 bool tx_pause, bool rx_pause)
1065 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
1066 struct dsa_switch *ds = dp->ds;
1068 if (!ds->ops->phylink_mac_link_up) {
1069 if (ds->ops->adjust_link && phydev)
1070 ds->ops->adjust_link(ds, dp->index, phydev);
1074 ds->ops->phylink_mac_link_up(ds, dp->index, mode, interface, phydev,
1075 speed, duplex, tx_pause, rx_pause);
1078 static const struct phylink_mac_ops dsa_port_phylink_mac_ops = {
1079 .validate = dsa_port_phylink_validate,
1080 .mac_pcs_get_state = dsa_port_phylink_mac_pcs_get_state,
1081 .mac_config = dsa_port_phylink_mac_config,
1082 .mac_an_restart = dsa_port_phylink_mac_an_restart,
1083 .mac_link_down = dsa_port_phylink_mac_link_down,
1084 .mac_link_up = dsa_port_phylink_mac_link_up,
1087 int dsa_port_phylink_create(struct dsa_port *dp)
1089 struct dsa_switch *ds = dp->ds;
1090 phy_interface_t mode;
1093 err = of_get_phy_mode(dp->dn, &mode);
1095 mode = PHY_INTERFACE_MODE_NA;
1097 /* Presence of phylink_mac_link_state or phylink_mac_an_restart is
1098 * an indicator of a legacy phylink driver.
1100 if (ds->ops->phylink_mac_link_state ||
1101 ds->ops->phylink_mac_an_restart)
1102 dp->pl_config.legacy_pre_march2020 = true;
1104 if (ds->ops->phylink_get_caps)
1105 ds->ops->phylink_get_caps(ds, dp->index, &dp->pl_config);
1107 dp->pl = phylink_create(&dp->pl_config, of_fwnode_handle(dp->dn),
1108 mode, &dsa_port_phylink_mac_ops);
1109 if (IS_ERR(dp->pl)) {
1110 pr_err("error creating PHYLINK: %ld\n", PTR_ERR(dp->pl));
1111 return PTR_ERR(dp->pl);
1117 static int dsa_port_setup_phy_of(struct dsa_port *dp, bool enable)
1119 struct dsa_switch *ds = dp->ds;
1120 struct phy_device *phydev;
1121 int port = dp->index;
1124 phydev = dsa_port_get_phy_device(dp);
1129 return PTR_ERR(phydev);
1132 err = genphy_resume(phydev);
1136 err = genphy_read_status(phydev);
1140 err = genphy_suspend(phydev);
1145 if (ds->ops->adjust_link)
1146 ds->ops->adjust_link(ds, port, phydev);
1148 dev_dbg(ds->dev, "enabled port's phy: %s", phydev_name(phydev));
1151 put_device(&phydev->mdio.dev);
1155 static int dsa_port_fixed_link_register_of(struct dsa_port *dp)
1157 struct device_node *dn = dp->dn;
1158 struct dsa_switch *ds = dp->ds;
1159 struct phy_device *phydev;
1160 int port = dp->index;
1161 phy_interface_t mode;
1164 err = of_phy_register_fixed_link(dn);
1167 "failed to register the fixed PHY of port %d\n",
1172 phydev = of_phy_find_device(dn);
1174 err = of_get_phy_mode(dn, &mode);
1176 mode = PHY_INTERFACE_MODE_NA;
1177 phydev->interface = mode;
1179 genphy_read_status(phydev);
1181 if (ds->ops->adjust_link)
1182 ds->ops->adjust_link(ds, port, phydev);
1184 put_device(&phydev->mdio.dev);
1189 static int dsa_port_phylink_register(struct dsa_port *dp)
1191 struct dsa_switch *ds = dp->ds;
1192 struct device_node *port_dn = dp->dn;
1195 dp->pl_config.dev = ds->dev;
1196 dp->pl_config.type = PHYLINK_DEV;
1197 dp->pl_config.pcs_poll = ds->pcs_poll;
1199 err = dsa_port_phylink_create(dp);
1203 err = phylink_of_phy_connect(dp->pl, port_dn, 0);
1204 if (err && err != -ENODEV) {
1205 pr_err("could not attach to PHY: %d\n", err);
1206 goto err_phy_connect;
1212 phylink_destroy(dp->pl);
1216 int dsa_port_link_register_of(struct dsa_port *dp)
1218 struct dsa_switch *ds = dp->ds;
1219 struct device_node *phy_np;
1220 int port = dp->index;
1222 if (!ds->ops->adjust_link) {
1223 phy_np = of_parse_phandle(dp->dn, "phy-handle", 0);
1224 if (of_phy_is_fixed_link(dp->dn) || phy_np) {
1225 if (ds->ops->phylink_mac_link_down)
1226 ds->ops->phylink_mac_link_down(ds, port,
1227 MLO_AN_FIXED, PHY_INTERFACE_MODE_NA);
1228 return dsa_port_phylink_register(dp);
1234 "Using legacy PHYLIB callbacks. Please migrate to PHYLINK!\n");
1236 if (of_phy_is_fixed_link(dp->dn))
1237 return dsa_port_fixed_link_register_of(dp);
1239 return dsa_port_setup_phy_of(dp, true);
1242 void dsa_port_link_unregister_of(struct dsa_port *dp)
1244 struct dsa_switch *ds = dp->ds;
1246 if (!ds->ops->adjust_link && dp->pl) {
1248 phylink_disconnect_phy(dp->pl);
1250 phylink_destroy(dp->pl);
1255 if (of_phy_is_fixed_link(dp->dn))
1256 of_phy_deregister_fixed_link(dp->dn);
1258 dsa_port_setup_phy_of(dp, false);
1261 int dsa_port_get_phy_strings(struct dsa_port *dp, uint8_t *data)
1263 struct phy_device *phydev;
1264 int ret = -EOPNOTSUPP;
1266 if (of_phy_is_fixed_link(dp->dn))
1269 phydev = dsa_port_get_phy_device(dp);
1270 if (IS_ERR_OR_NULL(phydev))
1273 ret = phy_ethtool_get_strings(phydev, data);
1274 put_device(&phydev->mdio.dev);
1278 EXPORT_SYMBOL_GPL(dsa_port_get_phy_strings);
1280 int dsa_port_get_ethtool_phy_stats(struct dsa_port *dp, uint64_t *data)
1282 struct phy_device *phydev;
1283 int ret = -EOPNOTSUPP;
1285 if (of_phy_is_fixed_link(dp->dn))
1288 phydev = dsa_port_get_phy_device(dp);
1289 if (IS_ERR_OR_NULL(phydev))
1292 ret = phy_ethtool_get_stats(phydev, NULL, data);
1293 put_device(&phydev->mdio.dev);
1297 EXPORT_SYMBOL_GPL(dsa_port_get_ethtool_phy_stats);
1299 int dsa_port_get_phy_sset_count(struct dsa_port *dp)
1301 struct phy_device *phydev;
1302 int ret = -EOPNOTSUPP;
1304 if (of_phy_is_fixed_link(dp->dn))
1307 phydev = dsa_port_get_phy_device(dp);
1308 if (IS_ERR_OR_NULL(phydev))
1311 ret = phy_ethtool_get_sset_count(phydev);
1312 put_device(&phydev->mdio.dev);
1316 EXPORT_SYMBOL_GPL(dsa_port_get_phy_sset_count);
1318 int dsa_port_hsr_join(struct dsa_port *dp, struct net_device *hsr)
1320 struct dsa_switch *ds = dp->ds;
1323 if (!ds->ops->port_hsr_join)
1328 err = ds->ops->port_hsr_join(ds, dp->index, hsr);
1335 void dsa_port_hsr_leave(struct dsa_port *dp, struct net_device *hsr)
1337 struct dsa_switch *ds = dp->ds;
1342 if (ds->ops->port_hsr_leave) {
1343 err = ds->ops->port_hsr_leave(ds, dp->index, hsr);
1345 dev_err(dp->ds->dev,
1346 "port %d failed to leave HSR %s: %pe\n",
1347 dp->index, hsr->name, ERR_PTR(err));
1351 int dsa_port_tag_8021q_vlan_add(struct dsa_port *dp, u16 vid, bool broadcast)
1353 struct dsa_notifier_tag_8021q_vlan_info info = {
1354 .tree_index = dp->ds->dst->index,
1355 .sw_index = dp->ds->index,
1361 return dsa_broadcast(DSA_NOTIFIER_TAG_8021Q_VLAN_ADD, &info);
1363 return dsa_port_notify(dp, DSA_NOTIFIER_TAG_8021Q_VLAN_ADD, &info);
1366 void dsa_port_tag_8021q_vlan_del(struct dsa_port *dp, u16 vid, bool broadcast)
1368 struct dsa_notifier_tag_8021q_vlan_info info = {
1369 .tree_index = dp->ds->dst->index,
1370 .sw_index = dp->ds->index,
1377 err = dsa_broadcast(DSA_NOTIFIER_TAG_8021Q_VLAN_DEL, &info);
1379 err = dsa_port_notify(dp, DSA_NOTIFIER_TAG_8021Q_VLAN_DEL, &info);
1381 dev_err(dp->ds->dev,
1382 "port %d failed to notify tag_8021q VLAN %d deletion: %pe\n",
1383 dp->index, vid, ERR_PTR(err));