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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Handling of a single switch port
4 *
5 * Copyright (c) 2017 Savoir-faire Linux Inc.
6 * Vivien Didelot <vivien.didelot@savoirfairelinux.com>
7 */
8
9#include <linux/if_bridge.h>
10#include <linux/notifier.h>
11#include <linux/of_mdio.h>
12#include <linux/of_net.h>
13
14#include "dsa_priv.h"
15
16/**
17 * dsa_port_notify - Notify the switching fabric of changes to a port
18 * @dp: port on which change occurred
19 * @e: event, must be of type DSA_NOTIFIER_*
20 * @v: event-specific value.
21 *
22 * Notify all switches in the DSA tree that this port's switch belongs to,
23 * including this switch itself, of an event. Allows the other switches to
24 * reconfigure themselves for cross-chip operations. Can also be used to
25 * reconfigure ports without net_devices (CPU ports, DSA links) whenever
26 * a user port's state changes.
27 */
28static int dsa_port_notify(const struct dsa_port *dp, unsigned long e, void *v)
29{
30 return dsa_tree_notify(dp->ds->dst, e, v);
31}
32
33int dsa_port_set_state(struct dsa_port *dp, u8 state)
34{
35 struct dsa_switch *ds = dp->ds;
36 int port = dp->index;
37
38 if (!ds->ops->port_stp_state_set)
39 return -EOPNOTSUPP;
40
41 ds->ops->port_stp_state_set(ds, port, state);
42
43 if (ds->ops->port_fast_age) {
44 /* Fast age FDB entries or flush appropriate forwarding database
45 * for the given port, if we are moving it from Learning or
46 * Forwarding state, to Disabled or Blocking or Listening state.
47 */
48
49 if ((dp->stp_state == BR_STATE_LEARNING ||
50 dp->stp_state == BR_STATE_FORWARDING) &&
51 (state == BR_STATE_DISABLED ||
52 state == BR_STATE_BLOCKING ||
53 state == BR_STATE_LISTENING))
54 ds->ops->port_fast_age(ds, port);
55 }
56
57 dp->stp_state = state;
58
59 return 0;
60}
61
62static void dsa_port_set_state_now(struct dsa_port *dp, u8 state)
63{
64 int err;
65
66 err = dsa_port_set_state(dp, state);
67 if (err)
68 pr_err("DSA: failed to set STP state %u (%d)\n", state, err);
69}
70
71int dsa_port_enable_rt(struct dsa_port *dp, struct phy_device *phy)
72{
73 struct dsa_switch *ds = dp->ds;
74 int port = dp->index;
75 int err;
76
77 if (ds->ops->port_enable) {
78 err = ds->ops->port_enable(ds, port, phy);
79 if (err)
80 return err;
81 }
82
83 if (!dp->bridge_dev)
84 dsa_port_set_state_now(dp, BR_STATE_FORWARDING);
85
86 if (dp->pl)
87 phylink_start(dp->pl);
88
89 return 0;
90}
91
92int dsa_port_enable(struct dsa_port *dp, struct phy_device *phy)
93{
94 int err;
95
96 rtnl_lock();
97 err = dsa_port_enable_rt(dp, phy);
98 rtnl_unlock();
99
100 return err;
101}
102
103void dsa_port_disable_rt(struct dsa_port *dp)
104{
105 struct dsa_switch *ds = dp->ds;
106 int port = dp->index;
107
108 if (dp->pl)
109 phylink_stop(dp->pl);
110
111 if (!dp->bridge_dev)
112 dsa_port_set_state_now(dp, BR_STATE_DISABLED);
113
114 if (ds->ops->port_disable)
115 ds->ops->port_disable(ds, port);
116}
117
118void dsa_port_disable(struct dsa_port *dp)
119{
120 rtnl_lock();
121 dsa_port_disable_rt(dp);
122 rtnl_unlock();
123}
124
125static int dsa_port_inherit_brport_flags(struct dsa_port *dp,
126 struct netlink_ext_ack *extack)
127{
128 const unsigned long mask = BR_LEARNING | BR_FLOOD | BR_MCAST_FLOOD |
129 BR_BCAST_FLOOD;
130 struct net_device *brport_dev = dsa_port_to_bridge_port(dp);
131 int flag, err;
132
133 for_each_set_bit(flag, &mask, 32) {
134 struct switchdev_brport_flags flags = {0};
135
136 flags.mask = BIT(flag);
137
138 if (br_port_flag_is_set(brport_dev, BIT(flag)))
139 flags.val = BIT(flag);
140
141 err = dsa_port_bridge_flags(dp, flags, extack);
142 if (err && err != -EOPNOTSUPP)
143 return err;
144 }
145
146 return 0;
147}
148
149static void dsa_port_clear_brport_flags(struct dsa_port *dp)
150{
151 const unsigned long val = BR_FLOOD | BR_MCAST_FLOOD | BR_BCAST_FLOOD;
152 const unsigned long mask = BR_LEARNING | BR_FLOOD | BR_MCAST_FLOOD |
153 BR_BCAST_FLOOD;
154 int flag, err;
155
156 for_each_set_bit(flag, &mask, 32) {
157 struct switchdev_brport_flags flags = {0};
158
159 flags.mask = BIT(flag);
160 flags.val = val & BIT(flag);
161
162 err = dsa_port_bridge_flags(dp, flags, NULL);
163 if (err && err != -EOPNOTSUPP)
164 dev_err(dp->ds->dev,
165 "failed to clear bridge port flag %lu: %pe\n",
166 flags.val, ERR_PTR(err));
167 }
168}
169
170static int dsa_port_switchdev_sync(struct dsa_port *dp,
171 struct netlink_ext_ack *extack)
172{
173 struct net_device *brport_dev = dsa_port_to_bridge_port(dp);
174 struct net_device *br = dp->bridge_dev;
175 int err;
176
177 err = dsa_port_inherit_brport_flags(dp, extack);
178 if (err)
179 return err;
180
181 err = dsa_port_set_state(dp, br_port_get_stp_state(brport_dev));
182 if (err && err != -EOPNOTSUPP)
183 return err;
184
185 err = dsa_port_vlan_filtering(dp, br_vlan_enabled(br), extack);
186 if (err && err != -EOPNOTSUPP)
187 return err;
188
189 err = dsa_port_ageing_time(dp, br_get_ageing_time(br));
190 if (err && err != -EOPNOTSUPP)
191 return err;
192
193 err = br_mdb_replay(br, brport_dev, dp, true,
194 &dsa_slave_switchdev_blocking_notifier, extack);
195 if (err && err != -EOPNOTSUPP)
196 return err;
197
198 /* Forwarding and termination FDB entries on the port */
199 err = br_fdb_replay(br, brport_dev, dp, true,
200 &dsa_slave_switchdev_notifier);
201 if (err && err != -EOPNOTSUPP)
202 return err;
203
204 /* Termination FDB entries on the bridge itself */
205 err = br_fdb_replay(br, br, dp, true, &dsa_slave_switchdev_notifier);
206 if (err && err != -EOPNOTSUPP)
207 return err;
208
209 err = br_vlan_replay(br, brport_dev, dp, true,
210 &dsa_slave_switchdev_blocking_notifier, extack);
211 if (err && err != -EOPNOTSUPP)
212 return err;
213
214 return 0;
215}
216
217static int dsa_port_switchdev_unsync_objs(struct dsa_port *dp,
218 struct net_device *br,
219 struct netlink_ext_ack *extack)
220{
221 struct net_device *brport_dev = dsa_port_to_bridge_port(dp);
222 int err;
223
224 /* Delete the switchdev objects left on this port */
225 err = br_mdb_replay(br, brport_dev, dp, false,
226 &dsa_slave_switchdev_blocking_notifier, extack);
227 if (err && err != -EOPNOTSUPP)
228 return err;
229
230 /* Forwarding and termination FDB entries on the port */
231 err = br_fdb_replay(br, brport_dev, dp, false,
232 &dsa_slave_switchdev_notifier);
233 if (err && err != -EOPNOTSUPP)
234 return err;
235
236 /* Termination FDB entries on the bridge itself */
237 err = br_fdb_replay(br, br, dp, false, &dsa_slave_switchdev_notifier);
238 if (err && err != -EOPNOTSUPP)
239 return err;
240
241 err = br_vlan_replay(br, brport_dev, dp, false,
242 &dsa_slave_switchdev_blocking_notifier, extack);
243 if (err && err != -EOPNOTSUPP)
244 return err;
245
246 return 0;
247}
248
249static void dsa_port_switchdev_unsync_attrs(struct dsa_port *dp)
250{
251 /* Configure the port for standalone mode (no address learning,
252 * flood everything).
253 * The bridge only emits SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS events
254 * when the user requests it through netlink or sysfs, but not
255 * automatically at port join or leave, so we need to handle resetting
256 * the brport flags ourselves. But we even prefer it that way, because
257 * otherwise, some setups might never get the notification they need,
258 * for example, when a port leaves a LAG that offloads the bridge,
259 * it becomes standalone, but as far as the bridge is concerned, no
260 * port ever left.
261 */
262 dsa_port_clear_brport_flags(dp);
263
264 /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
265 * so allow it to be in BR_STATE_FORWARDING to be kept functional
266 */
267 dsa_port_set_state_now(dp, BR_STATE_FORWARDING);
268
269 /* VLAN filtering is handled by dsa_switch_bridge_leave */
270
271 /* Ageing time may be global to the switch chip, so don't change it
272 * here because we have no good reason (or value) to change it to.
273 */
274}
275
276int dsa_port_bridge_join(struct dsa_port *dp, struct net_device *br,
277 struct netlink_ext_ack *extack)
278{
279 struct dsa_notifier_bridge_info info = {
280 .tree_index = dp->ds->dst->index,
281 .sw_index = dp->ds->index,
282 .port = dp->index,
283 .br = br,
284 };
285 int err;
286
287 /* Here the interface is already bridged. Reflect the current
288 * configuration so that drivers can program their chips accordingly.
289 */
290 dp->bridge_dev = br;
291
292 err = dsa_broadcast(DSA_NOTIFIER_BRIDGE_JOIN, &info);
293 if (err)
294 goto out_rollback;
295
296 err = dsa_port_switchdev_sync(dp, extack);
297 if (err)
298 goto out_rollback_unbridge;
299
300 return 0;
301
302out_rollback_unbridge:
303 dsa_broadcast(DSA_NOTIFIER_BRIDGE_LEAVE, &info);
304out_rollback:
305 dp->bridge_dev = NULL;
306 return err;
307}
308
309int dsa_port_pre_bridge_leave(struct dsa_port *dp, struct net_device *br,
310 struct netlink_ext_ack *extack)
311{
312 return dsa_port_switchdev_unsync_objs(dp, br, extack);
313}
314
315void dsa_port_bridge_leave(struct dsa_port *dp, struct net_device *br)
316{
317 struct dsa_notifier_bridge_info info = {
318 .tree_index = dp->ds->dst->index,
319 .sw_index = dp->ds->index,
320 .port = dp->index,
321 .br = br,
322 };
323 int err;
324
325 /* Here the port is already unbridged. Reflect the current configuration
326 * so that drivers can program their chips accordingly.
327 */
328 dp->bridge_dev = NULL;
329
330 err = dsa_broadcast(DSA_NOTIFIER_BRIDGE_LEAVE, &info);
331 if (err)
332 pr_err("DSA: failed to notify DSA_NOTIFIER_BRIDGE_LEAVE\n");
333
334 dsa_port_switchdev_unsync_attrs(dp);
335}
336
337int dsa_port_lag_change(struct dsa_port *dp,
338 struct netdev_lag_lower_state_info *linfo)
339{
340 struct dsa_notifier_lag_info info = {
341 .sw_index = dp->ds->index,
342 .port = dp->index,
343 };
344 bool tx_enabled;
345
346 if (!dp->lag_dev)
347 return 0;
348
349 /* On statically configured aggregates (e.g. loadbalance
350 * without LACP) ports will always be tx_enabled, even if the
351 * link is down. Thus we require both link_up and tx_enabled
352 * in order to include it in the tx set.
353 */
354 tx_enabled = linfo->link_up && linfo->tx_enabled;
355
356 if (tx_enabled == dp->lag_tx_enabled)
357 return 0;
358
359 dp->lag_tx_enabled = tx_enabled;
360
361 return dsa_port_notify(dp, DSA_NOTIFIER_LAG_CHANGE, &info);
362}
363
364int dsa_port_lag_join(struct dsa_port *dp, struct net_device *lag,
365 struct netdev_lag_upper_info *uinfo,
366 struct netlink_ext_ack *extack)
367{
368 struct dsa_notifier_lag_info info = {
369 .sw_index = dp->ds->index,
370 .port = dp->index,
371 .lag = lag,
372 .info = uinfo,
373 };
374 struct net_device *bridge_dev;
375 int err;
376
377 dsa_lag_map(dp->ds->dst, lag);
378 dp->lag_dev = lag;
379
380 err = dsa_port_notify(dp, DSA_NOTIFIER_LAG_JOIN, &info);
381 if (err)
382 goto err_lag_join;
383
384 bridge_dev = netdev_master_upper_dev_get(lag);
385 if (!bridge_dev || !netif_is_bridge_master(bridge_dev))
386 return 0;
387
388 err = dsa_port_bridge_join(dp, bridge_dev, extack);
389 if (err)
390 goto err_bridge_join;
391
392 return 0;
393
394err_bridge_join:
395 dsa_port_notify(dp, DSA_NOTIFIER_LAG_LEAVE, &info);
396err_lag_join:
397 dp->lag_dev = NULL;
398 dsa_lag_unmap(dp->ds->dst, lag);
399 return err;
400}
401
402int dsa_port_pre_lag_leave(struct dsa_port *dp, struct net_device *lag,
403 struct netlink_ext_ack *extack)
404{
405 if (dp->bridge_dev)
406 return dsa_port_pre_bridge_leave(dp, dp->bridge_dev, extack);
407
408 return 0;
409}
410
411void dsa_port_lag_leave(struct dsa_port *dp, struct net_device *lag)
412{
413 struct dsa_notifier_lag_info info = {
414 .sw_index = dp->ds->index,
415 .port = dp->index,
416 .lag = lag,
417 };
418 int err;
419
420 if (!dp->lag_dev)
421 return;
422
423 /* Port might have been part of a LAG that in turn was
424 * attached to a bridge.
425 */
426 if (dp->bridge_dev)
427 dsa_port_bridge_leave(dp, dp->bridge_dev);
428
429 dp->lag_tx_enabled = false;
430 dp->lag_dev = NULL;
431
432 err = dsa_port_notify(dp, DSA_NOTIFIER_LAG_LEAVE, &info);
433 if (err)
434 pr_err("DSA: failed to notify DSA_NOTIFIER_LAG_LEAVE: %d\n",
435 err);
436
437 dsa_lag_unmap(dp->ds->dst, lag);
438}
439
440/* Must be called under rcu_read_lock() */
441static bool dsa_port_can_apply_vlan_filtering(struct dsa_port *dp,
442 bool vlan_filtering,
443 struct netlink_ext_ack *extack)
444{
445 struct dsa_switch *ds = dp->ds;
446 int err, i;
447
448 /* VLAN awareness was off, so the question is "can we turn it on".
449 * We may have had 8021q uppers, those need to go. Make sure we don't
450 * enter an inconsistent state: deny changing the VLAN awareness state
451 * as long as we have 8021q uppers.
452 */
453 if (vlan_filtering && dsa_is_user_port(ds, dp->index)) {
454 struct net_device *upper_dev, *slave = dp->slave;
455 struct net_device *br = dp->bridge_dev;
456 struct list_head *iter;
457
458 netdev_for_each_upper_dev_rcu(slave, upper_dev, iter) {
459 struct bridge_vlan_info br_info;
460 u16 vid;
461
462 if (!is_vlan_dev(upper_dev))
463 continue;
464
465 vid = vlan_dev_vlan_id(upper_dev);
466
467 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the
468 * device, respectively the VID is not found, returning
469 * 0 means success, which is a failure for us here.
470 */
471 err = br_vlan_get_info(br, vid, &br_info);
472 if (err == 0) {
473 NL_SET_ERR_MSG_MOD(extack,
474 "Must first remove VLAN uppers having VIDs also present in bridge");
475 return false;
476 }
477 }
478 }
479
480 if (!ds->vlan_filtering_is_global)
481 return true;
482
483 /* For cases where enabling/disabling VLAN awareness is global to the
484 * switch, we need to handle the case where multiple bridges span
485 * different ports of the same switch device and one of them has a
486 * different setting than what is being requested.
487 */
488 for (i = 0; i < ds->num_ports; i++) {
489 struct net_device *other_bridge;
490
491 other_bridge = dsa_to_port(ds, i)->bridge_dev;
492 if (!other_bridge)
493 continue;
494 /* If it's the same bridge, it also has same
495 * vlan_filtering setting => no need to check
496 */
497 if (other_bridge == dp->bridge_dev)
498 continue;
499 if (br_vlan_enabled(other_bridge) != vlan_filtering) {
500 NL_SET_ERR_MSG_MOD(extack,
501 "VLAN filtering is a global setting");
502 return false;
503 }
504 }
505 return true;
506}
507
508int dsa_port_vlan_filtering(struct dsa_port *dp, bool vlan_filtering,
509 struct netlink_ext_ack *extack)
510{
511 struct dsa_switch *ds = dp->ds;
512 bool apply;
513 int err;
514
515 if (!ds->ops->port_vlan_filtering)
516 return -EOPNOTSUPP;
517
518 /* We are called from dsa_slave_switchdev_blocking_event(),
519 * which is not under rcu_read_lock(), unlike
520 * dsa_slave_switchdev_event().
521 */
522 rcu_read_lock();
523 apply = dsa_port_can_apply_vlan_filtering(dp, vlan_filtering, extack);
524 rcu_read_unlock();
525 if (!apply)
526 return -EINVAL;
527
528 if (dsa_port_is_vlan_filtering(dp) == vlan_filtering)
529 return 0;
530
531 err = ds->ops->port_vlan_filtering(ds, dp->index, vlan_filtering,
532 extack);
533 if (err)
534 return err;
535
536 if (ds->vlan_filtering_is_global)
537 ds->vlan_filtering = vlan_filtering;
538 else
539 dp->vlan_filtering = vlan_filtering;
540
541 return 0;
542}
543
544/* This enforces legacy behavior for switch drivers which assume they can't
545 * receive VLAN configuration when enslaved to a bridge with vlan_filtering=0
546 */
547bool dsa_port_skip_vlan_configuration(struct dsa_port *dp)
548{
549 struct dsa_switch *ds = dp->ds;
550
551 if (!dp->bridge_dev)
552 return false;
553
554 return (!ds->configure_vlan_while_not_filtering &&
555 !br_vlan_enabled(dp->bridge_dev));
556}
557
558int dsa_port_ageing_time(struct dsa_port *dp, clock_t ageing_clock)
559{
560 unsigned long ageing_jiffies = clock_t_to_jiffies(ageing_clock);
561 unsigned int ageing_time = jiffies_to_msecs(ageing_jiffies);
562 struct dsa_notifier_ageing_time_info info;
563 int err;
564
565 info.ageing_time = ageing_time;
566
567 err = dsa_port_notify(dp, DSA_NOTIFIER_AGEING_TIME, &info);
568 if (err)
569 return err;
570
571 dp->ageing_time = ageing_time;
572
573 return 0;
574}
575
576int dsa_port_pre_bridge_flags(const struct dsa_port *dp,
577 struct switchdev_brport_flags flags,
578 struct netlink_ext_ack *extack)
579{
580 struct dsa_switch *ds = dp->ds;
581
582 if (!ds->ops->port_pre_bridge_flags)
583 return -EINVAL;
584
585 return ds->ops->port_pre_bridge_flags(ds, dp->index, flags, extack);
586}
587
588int dsa_port_bridge_flags(const struct dsa_port *dp,
589 struct switchdev_brport_flags flags,
590 struct netlink_ext_ack *extack)
591{
592 struct dsa_switch *ds = dp->ds;
593
594 if (!ds->ops->port_bridge_flags)
595 return -EOPNOTSUPP;
596
597 return ds->ops->port_bridge_flags(ds, dp->index, flags, extack);
598}
599
600int dsa_port_mtu_change(struct dsa_port *dp, int new_mtu,
601 bool targeted_match)
602{
603 struct dsa_notifier_mtu_info info = {
604 .sw_index = dp->ds->index,
605 .targeted_match = targeted_match,
606 .port = dp->index,
607 .mtu = new_mtu,
608 };
609
610 return dsa_port_notify(dp, DSA_NOTIFIER_MTU, &info);
611}
612
613int dsa_port_fdb_add(struct dsa_port *dp, const unsigned char *addr,
614 u16 vid)
615{
616 struct dsa_notifier_fdb_info info = {
617 .sw_index = dp->ds->index,
618 .port = dp->index,
619 .addr = addr,
620 .vid = vid,
621 };
622
623 return dsa_port_notify(dp, DSA_NOTIFIER_FDB_ADD, &info);
624}
625
626int dsa_port_fdb_del(struct dsa_port *dp, const unsigned char *addr,
627 u16 vid)
628{
629 struct dsa_notifier_fdb_info info = {
630 .sw_index = dp->ds->index,
631 .port = dp->index,
632 .addr = addr,
633 .vid = vid,
634
635 };
636
637 return dsa_port_notify(dp, DSA_NOTIFIER_FDB_DEL, &info);
638}
639
640int dsa_port_host_fdb_add(struct dsa_port *dp, const unsigned char *addr,
641 u16 vid)
642{
643 struct dsa_notifier_fdb_info info = {
644 .sw_index = dp->ds->index,
645 .port = dp->index,
646 .addr = addr,
647 .vid = vid,
648 };
649 struct dsa_port *cpu_dp = dp->cpu_dp;
650 int err;
651
652 err = dev_uc_add(cpu_dp->master, addr);
653 if (err)
654 return err;
655
656 return dsa_port_notify(dp, DSA_NOTIFIER_HOST_FDB_ADD, &info);
657}
658
659int dsa_port_host_fdb_del(struct dsa_port *dp, const unsigned char *addr,
660 u16 vid)
661{
662 struct dsa_notifier_fdb_info info = {
663 .sw_index = dp->ds->index,
664 .port = dp->index,
665 .addr = addr,
666 .vid = vid,
667 };
668 struct dsa_port *cpu_dp = dp->cpu_dp;
669 int err;
670
671 err = dev_uc_del(cpu_dp->master, addr);
672 if (err)
673 return err;
674
675 return dsa_port_notify(dp, DSA_NOTIFIER_HOST_FDB_DEL, &info);
676}
677
678int dsa_port_fdb_dump(struct dsa_port *dp, dsa_fdb_dump_cb_t *cb, void *data)
679{
680 struct dsa_switch *ds = dp->ds;
681 int port = dp->index;
682
683 if (!ds->ops->port_fdb_dump)
684 return -EOPNOTSUPP;
685
686 return ds->ops->port_fdb_dump(ds, port, cb, data);
687}
688
689int dsa_port_mdb_add(const struct dsa_port *dp,
690 const struct switchdev_obj_port_mdb *mdb)
691{
692 struct dsa_notifier_mdb_info info = {
693 .sw_index = dp->ds->index,
694 .port = dp->index,
695 .mdb = mdb,
696 };
697
698 return dsa_port_notify(dp, DSA_NOTIFIER_MDB_ADD, &info);
699}
700
701int dsa_port_mdb_del(const struct dsa_port *dp,
702 const struct switchdev_obj_port_mdb *mdb)
703{
704 struct dsa_notifier_mdb_info info = {
705 .sw_index = dp->ds->index,
706 .port = dp->index,
707 .mdb = mdb,
708 };
709
710 return dsa_port_notify(dp, DSA_NOTIFIER_MDB_DEL, &info);
711}
712
713int dsa_port_host_mdb_add(const struct dsa_port *dp,
714 const struct switchdev_obj_port_mdb *mdb)
715{
716 struct dsa_notifier_mdb_info info = {
717 .sw_index = dp->ds->index,
718 .port = dp->index,
719 .mdb = mdb,
720 };
721 struct dsa_port *cpu_dp = dp->cpu_dp;
722 int err;
723
724 err = dev_mc_add(cpu_dp->master, mdb->addr);
725 if (err)
726 return err;
727
728 return dsa_port_notify(dp, DSA_NOTIFIER_HOST_MDB_ADD, &info);
729}
730
731int dsa_port_host_mdb_del(const struct dsa_port *dp,
732 const struct switchdev_obj_port_mdb *mdb)
733{
734 struct dsa_notifier_mdb_info info = {
735 .sw_index = dp->ds->index,
736 .port = dp->index,
737 .mdb = mdb,
738 };
739 struct dsa_port *cpu_dp = dp->cpu_dp;
740 int err;
741
742 err = dev_mc_del(cpu_dp->master, mdb->addr);
743 if (err)
744 return err;
745
746 return dsa_port_notify(dp, DSA_NOTIFIER_HOST_MDB_DEL, &info);
747}
748
749int dsa_port_vlan_add(struct dsa_port *dp,
750 const struct switchdev_obj_port_vlan *vlan,
751 struct netlink_ext_ack *extack)
752{
753 struct dsa_notifier_vlan_info info = {
754 .sw_index = dp->ds->index,
755 .port = dp->index,
756 .vlan = vlan,
757 .extack = extack,
758 };
759
760 return dsa_port_notify(dp, DSA_NOTIFIER_VLAN_ADD, &info);
761}
762
763int dsa_port_vlan_del(struct dsa_port *dp,
764 const struct switchdev_obj_port_vlan *vlan)
765{
766 struct dsa_notifier_vlan_info info = {
767 .sw_index = dp->ds->index,
768 .port = dp->index,
769 .vlan = vlan,
770 };
771
772 return dsa_port_notify(dp, DSA_NOTIFIER_VLAN_DEL, &info);
773}
774
775int dsa_port_mrp_add(const struct dsa_port *dp,
776 const struct switchdev_obj_mrp *mrp)
777{
778 struct dsa_notifier_mrp_info info = {
779 .sw_index = dp->ds->index,
780 .port = dp->index,
781 .mrp = mrp,
782 };
783
784 return dsa_port_notify(dp, DSA_NOTIFIER_MRP_ADD, &info);
785}
786
787int dsa_port_mrp_del(const struct dsa_port *dp,
788 const struct switchdev_obj_mrp *mrp)
789{
790 struct dsa_notifier_mrp_info info = {
791 .sw_index = dp->ds->index,
792 .port = dp->index,
793 .mrp = mrp,
794 };
795
796 return dsa_port_notify(dp, DSA_NOTIFIER_MRP_DEL, &info);
797}
798
799int dsa_port_mrp_add_ring_role(const struct dsa_port *dp,
800 const struct switchdev_obj_ring_role_mrp *mrp)
801{
802 struct dsa_notifier_mrp_ring_role_info info = {
803 .sw_index = dp->ds->index,
804 .port = dp->index,
805 .mrp = mrp,
806 };
807
808 return dsa_port_notify(dp, DSA_NOTIFIER_MRP_ADD_RING_ROLE, &info);
809}
810
811int dsa_port_mrp_del_ring_role(const struct dsa_port *dp,
812 const struct switchdev_obj_ring_role_mrp *mrp)
813{
814 struct dsa_notifier_mrp_ring_role_info info = {
815 .sw_index = dp->ds->index,
816 .port = dp->index,
817 .mrp = mrp,
818 };
819
820 return dsa_port_notify(dp, DSA_NOTIFIER_MRP_DEL_RING_ROLE, &info);
821}
822
823void dsa_port_set_tag_protocol(struct dsa_port *cpu_dp,
824 const struct dsa_device_ops *tag_ops)
825{
826 cpu_dp->filter = tag_ops->filter;
827 cpu_dp->rcv = tag_ops->rcv;
828 cpu_dp->tag_ops = tag_ops;
829}
830
831static struct phy_device *dsa_port_get_phy_device(struct dsa_port *dp)
832{
833 struct device_node *phy_dn;
834 struct phy_device *phydev;
835
836 phy_dn = of_parse_phandle(dp->dn, "phy-handle", 0);
837 if (!phy_dn)
838 return NULL;
839
840 phydev = of_phy_find_device(phy_dn);
841 if (!phydev) {
842 of_node_put(phy_dn);
843 return ERR_PTR(-EPROBE_DEFER);
844 }
845
846 of_node_put(phy_dn);
847 return phydev;
848}
849
850static void dsa_port_phylink_validate(struct phylink_config *config,
851 unsigned long *supported,
852 struct phylink_link_state *state)
853{
854 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
855 struct dsa_switch *ds = dp->ds;
856
857 if (!ds->ops->phylink_validate)
858 return;
859
860 ds->ops->phylink_validate(ds, dp->index, supported, state);
861}
862
863static void dsa_port_phylink_mac_pcs_get_state(struct phylink_config *config,
864 struct phylink_link_state *state)
865{
866 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
867 struct dsa_switch *ds = dp->ds;
868 int err;
869
870 /* Only called for inband modes */
871 if (!ds->ops->phylink_mac_link_state) {
872 state->link = 0;
873 return;
874 }
875
876 err = ds->ops->phylink_mac_link_state(ds, dp->index, state);
877 if (err < 0) {
878 dev_err(ds->dev, "p%d: phylink_mac_link_state() failed: %d\n",
879 dp->index, err);
880 state->link = 0;
881 }
882}
883
884static void dsa_port_phylink_mac_config(struct phylink_config *config,
885 unsigned int mode,
886 const struct phylink_link_state *state)
887{
888 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
889 struct dsa_switch *ds = dp->ds;
890
891 if (!ds->ops->phylink_mac_config)
892 return;
893
894 ds->ops->phylink_mac_config(ds, dp->index, mode, state);
895}
896
897static void dsa_port_phylink_mac_an_restart(struct phylink_config *config)
898{
899 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
900 struct dsa_switch *ds = dp->ds;
901
902 if (!ds->ops->phylink_mac_an_restart)
903 return;
904
905 ds->ops->phylink_mac_an_restart(ds, dp->index);
906}
907
908static void dsa_port_phylink_mac_link_down(struct phylink_config *config,
909 unsigned int mode,
910 phy_interface_t interface)
911{
912 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
913 struct phy_device *phydev = NULL;
914 struct dsa_switch *ds = dp->ds;
915
916 if (dsa_is_user_port(ds, dp->index))
917 phydev = dp->slave->phydev;
918
919 if (!ds->ops->phylink_mac_link_down) {
920 if (ds->ops->adjust_link && phydev)
921 ds->ops->adjust_link(ds, dp->index, phydev);
922 return;
923 }
924
925 ds->ops->phylink_mac_link_down(ds, dp->index, mode, interface);
926}
927
928static void dsa_port_phylink_mac_link_up(struct phylink_config *config,
929 struct phy_device *phydev,
930 unsigned int mode,
931 phy_interface_t interface,
932 int speed, int duplex,
933 bool tx_pause, bool rx_pause)
934{
935 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
936 struct dsa_switch *ds = dp->ds;
937
938 if (!ds->ops->phylink_mac_link_up) {
939 if (ds->ops->adjust_link && phydev)
940 ds->ops->adjust_link(ds, dp->index, phydev);
941 return;
942 }
943
944 ds->ops->phylink_mac_link_up(ds, dp->index, mode, interface, phydev,
945 speed, duplex, tx_pause, rx_pause);
946}
947
948const struct phylink_mac_ops dsa_port_phylink_mac_ops = {
949 .validate = dsa_port_phylink_validate,
950 .mac_pcs_get_state = dsa_port_phylink_mac_pcs_get_state,
951 .mac_config = dsa_port_phylink_mac_config,
952 .mac_an_restart = dsa_port_phylink_mac_an_restart,
953 .mac_link_down = dsa_port_phylink_mac_link_down,
954 .mac_link_up = dsa_port_phylink_mac_link_up,
955};
956
957static int dsa_port_setup_phy_of(struct dsa_port *dp, bool enable)
958{
959 struct dsa_switch *ds = dp->ds;
960 struct phy_device *phydev;
961 int port = dp->index;
962 int err = 0;
963
964 phydev = dsa_port_get_phy_device(dp);
965 if (!phydev)
966 return 0;
967
968 if (IS_ERR(phydev))
969 return PTR_ERR(phydev);
970
971 if (enable) {
972 err = genphy_resume(phydev);
973 if (err < 0)
974 goto err_put_dev;
975
976 err = genphy_read_status(phydev);
977 if (err < 0)
978 goto err_put_dev;
979 } else {
980 err = genphy_suspend(phydev);
981 if (err < 0)
982 goto err_put_dev;
983 }
984
985 if (ds->ops->adjust_link)
986 ds->ops->adjust_link(ds, port, phydev);
987
988 dev_dbg(ds->dev, "enabled port's phy: %s", phydev_name(phydev));
989
990err_put_dev:
991 put_device(&phydev->mdio.dev);
992 return err;
993}
994
995static int dsa_port_fixed_link_register_of(struct dsa_port *dp)
996{
997 struct device_node *dn = dp->dn;
998 struct dsa_switch *ds = dp->ds;
999 struct phy_device *phydev;
1000 int port = dp->index;
1001 phy_interface_t mode;
1002 int err;
1003
1004 err = of_phy_register_fixed_link(dn);
1005 if (err) {
1006 dev_err(ds->dev,
1007 "failed to register the fixed PHY of port %d\n",
1008 port);
1009 return err;
1010 }
1011
1012 phydev = of_phy_find_device(dn);
1013
1014 err = of_get_phy_mode(dn, &mode);
1015 if (err)
1016 mode = PHY_INTERFACE_MODE_NA;
1017 phydev->interface = mode;
1018
1019 genphy_read_status(phydev);
1020
1021 if (ds->ops->adjust_link)
1022 ds->ops->adjust_link(ds, port, phydev);
1023
1024 put_device(&phydev->mdio.dev);
1025
1026 return 0;
1027}
1028
1029static int dsa_port_phylink_register(struct dsa_port *dp)
1030{
1031 struct dsa_switch *ds = dp->ds;
1032 struct device_node *port_dn = dp->dn;
1033 phy_interface_t mode;
1034 int err;
1035
1036 err = of_get_phy_mode(port_dn, &mode);
1037 if (err)
1038 mode = PHY_INTERFACE_MODE_NA;
1039
1040 dp->pl_config.dev = ds->dev;
1041 dp->pl_config.type = PHYLINK_DEV;
1042 dp->pl_config.pcs_poll = ds->pcs_poll;
1043
1044 dp->pl = phylink_create(&dp->pl_config, of_fwnode_handle(port_dn),
1045 mode, &dsa_port_phylink_mac_ops);
1046 if (IS_ERR(dp->pl)) {
1047 pr_err("error creating PHYLINK: %ld\n", PTR_ERR(dp->pl));
1048 return PTR_ERR(dp->pl);
1049 }
1050
1051 err = phylink_of_phy_connect(dp->pl, port_dn, 0);
1052 if (err && err != -ENODEV) {
1053 pr_err("could not attach to PHY: %d\n", err);
1054 goto err_phy_connect;
1055 }
1056
1057 return 0;
1058
1059err_phy_connect:
1060 phylink_destroy(dp->pl);
1061 return err;
1062}
1063
1064int dsa_port_link_register_of(struct dsa_port *dp)
1065{
1066 struct dsa_switch *ds = dp->ds;
1067 struct device_node *phy_np;
1068 int port = dp->index;
1069
1070 if (!ds->ops->adjust_link) {
1071 phy_np = of_parse_phandle(dp->dn, "phy-handle", 0);
1072 if (of_phy_is_fixed_link(dp->dn) || phy_np) {
1073 if (ds->ops->phylink_mac_link_down)
1074 ds->ops->phylink_mac_link_down(ds, port,
1075 MLO_AN_FIXED, PHY_INTERFACE_MODE_NA);
1076 return dsa_port_phylink_register(dp);
1077 }
1078 return 0;
1079 }
1080
1081 dev_warn(ds->dev,
1082 "Using legacy PHYLIB callbacks. Please migrate to PHYLINK!\n");
1083
1084 if (of_phy_is_fixed_link(dp->dn))
1085 return dsa_port_fixed_link_register_of(dp);
1086 else
1087 return dsa_port_setup_phy_of(dp, true);
1088}
1089
1090void dsa_port_link_unregister_of(struct dsa_port *dp)
1091{
1092 struct dsa_switch *ds = dp->ds;
1093
1094 if (!ds->ops->adjust_link && dp->pl) {
1095 rtnl_lock();
1096 phylink_disconnect_phy(dp->pl);
1097 rtnl_unlock();
1098 phylink_destroy(dp->pl);
1099 dp->pl = NULL;
1100 return;
1101 }
1102
1103 if (of_phy_is_fixed_link(dp->dn))
1104 of_phy_deregister_fixed_link(dp->dn);
1105 else
1106 dsa_port_setup_phy_of(dp, false);
1107}
1108
1109int dsa_port_get_phy_strings(struct dsa_port *dp, uint8_t *data)
1110{
1111 struct phy_device *phydev;
1112 int ret = -EOPNOTSUPP;
1113
1114 if (of_phy_is_fixed_link(dp->dn))
1115 return ret;
1116
1117 phydev = dsa_port_get_phy_device(dp);
1118 if (IS_ERR_OR_NULL(phydev))
1119 return ret;
1120
1121 ret = phy_ethtool_get_strings(phydev, data);
1122 put_device(&phydev->mdio.dev);
1123
1124 return ret;
1125}
1126EXPORT_SYMBOL_GPL(dsa_port_get_phy_strings);
1127
1128int dsa_port_get_ethtool_phy_stats(struct dsa_port *dp, uint64_t *data)
1129{
1130 struct phy_device *phydev;
1131 int ret = -EOPNOTSUPP;
1132
1133 if (of_phy_is_fixed_link(dp->dn))
1134 return ret;
1135
1136 phydev = dsa_port_get_phy_device(dp);
1137 if (IS_ERR_OR_NULL(phydev))
1138 return ret;
1139
1140 ret = phy_ethtool_get_stats(phydev, NULL, data);
1141 put_device(&phydev->mdio.dev);
1142
1143 return ret;
1144}
1145EXPORT_SYMBOL_GPL(dsa_port_get_ethtool_phy_stats);
1146
1147int dsa_port_get_phy_sset_count(struct dsa_port *dp)
1148{
1149 struct phy_device *phydev;
1150 int ret = -EOPNOTSUPP;
1151
1152 if (of_phy_is_fixed_link(dp->dn))
1153 return ret;
1154
1155 phydev = dsa_port_get_phy_device(dp);
1156 if (IS_ERR_OR_NULL(phydev))
1157 return ret;
1158
1159 ret = phy_ethtool_get_sset_count(phydev);
1160 put_device(&phydev->mdio.dev);
1161
1162 return ret;
1163}
1164EXPORT_SYMBOL_GPL(dsa_port_get_phy_sset_count);
1165
1166int dsa_port_hsr_join(struct dsa_port *dp, struct net_device *hsr)
1167{
1168 struct dsa_notifier_hsr_info info = {
1169 .sw_index = dp->ds->index,
1170 .port = dp->index,
1171 .hsr = hsr,
1172 };
1173 int err;
1174
1175 dp->hsr_dev = hsr;
1176
1177 err = dsa_port_notify(dp, DSA_NOTIFIER_HSR_JOIN, &info);
1178 if (err)
1179 dp->hsr_dev = NULL;
1180
1181 return err;
1182}
1183
1184void dsa_port_hsr_leave(struct dsa_port *dp, struct net_device *hsr)
1185{
1186 struct dsa_notifier_hsr_info info = {
1187 .sw_index = dp->ds->index,
1188 .port = dp->index,
1189 .hsr = hsr,
1190 };
1191 int err;
1192
1193 dp->hsr_dev = NULL;
1194
1195 err = dsa_port_notify(dp, DSA_NOTIFIER_HSR_LEAVE, &info);
1196 if (err)
1197 pr_err("DSA: failed to notify DSA_NOTIFIER_HSR_LEAVE\n");
1198}
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Handling of a single switch port
4 *
5 * Copyright (c) 2017 Savoir-faire Linux Inc.
6 * Vivien Didelot <vivien.didelot@savoirfairelinux.com>
7 */
8
9#include <linux/if_bridge.h>
10#include <linux/notifier.h>
11#include <linux/of_mdio.h>
12#include <linux/of_net.h>
13
14#include "dsa_priv.h"
15
16static int dsa_port_notify(const struct dsa_port *dp, unsigned long e, void *v)
17{
18 struct raw_notifier_head *nh = &dp->ds->dst->nh;
19 int err;
20
21 err = raw_notifier_call_chain(nh, e, v);
22
23 return notifier_to_errno(err);
24}
25
26int dsa_port_set_state(struct dsa_port *dp, u8 state,
27 struct switchdev_trans *trans)
28{
29 struct dsa_switch *ds = dp->ds;
30 int port = dp->index;
31
32 if (switchdev_trans_ph_prepare(trans))
33 return ds->ops->port_stp_state_set ? 0 : -EOPNOTSUPP;
34
35 if (ds->ops->port_stp_state_set)
36 ds->ops->port_stp_state_set(ds, port, state);
37
38 if (ds->ops->port_fast_age) {
39 /* Fast age FDB entries or flush appropriate forwarding database
40 * for the given port, if we are moving it from Learning or
41 * Forwarding state, to Disabled or Blocking or Listening state.
42 */
43
44 if ((dp->stp_state == BR_STATE_LEARNING ||
45 dp->stp_state == BR_STATE_FORWARDING) &&
46 (state == BR_STATE_DISABLED ||
47 state == BR_STATE_BLOCKING ||
48 state == BR_STATE_LISTENING))
49 ds->ops->port_fast_age(ds, port);
50 }
51
52 dp->stp_state = state;
53
54 return 0;
55}
56
57static void dsa_port_set_state_now(struct dsa_port *dp, u8 state)
58{
59 int err;
60
61 err = dsa_port_set_state(dp, state, NULL);
62 if (err)
63 pr_err("DSA: failed to set STP state %u (%d)\n", state, err);
64}
65
66int dsa_port_enable(struct dsa_port *dp, struct phy_device *phy)
67{
68 struct dsa_switch *ds = dp->ds;
69 int port = dp->index;
70 int err;
71
72 if (ds->ops->port_enable) {
73 err = ds->ops->port_enable(ds, port, phy);
74 if (err)
75 return err;
76 }
77
78 if (!dp->bridge_dev)
79 dsa_port_set_state_now(dp, BR_STATE_FORWARDING);
80
81 return 0;
82}
83
84void dsa_port_disable(struct dsa_port *dp)
85{
86 struct dsa_switch *ds = dp->ds;
87 int port = dp->index;
88
89 if (!dp->bridge_dev)
90 dsa_port_set_state_now(dp, BR_STATE_DISABLED);
91
92 if (ds->ops->port_disable)
93 ds->ops->port_disable(ds, port);
94}
95
96int dsa_port_bridge_join(struct dsa_port *dp, struct net_device *br)
97{
98 struct dsa_notifier_bridge_info info = {
99 .sw_index = dp->ds->index,
100 .port = dp->index,
101 .br = br,
102 };
103 int err;
104
105 /* Set the flooding mode before joining the port in the switch */
106 err = dsa_port_bridge_flags(dp, BR_FLOOD | BR_MCAST_FLOOD, NULL);
107 if (err)
108 return err;
109
110 /* Here the interface is already bridged. Reflect the current
111 * configuration so that drivers can program their chips accordingly.
112 */
113 dp->bridge_dev = br;
114
115 err = dsa_port_notify(dp, DSA_NOTIFIER_BRIDGE_JOIN, &info);
116
117 /* The bridging is rolled back on error */
118 if (err) {
119 dsa_port_bridge_flags(dp, 0, NULL);
120 dp->bridge_dev = NULL;
121 }
122
123 return err;
124}
125
126void dsa_port_bridge_leave(struct dsa_port *dp, struct net_device *br)
127{
128 struct dsa_notifier_bridge_info info = {
129 .sw_index = dp->ds->index,
130 .port = dp->index,
131 .br = br,
132 };
133 int err;
134
135 /* Here the port is already unbridged. Reflect the current configuration
136 * so that drivers can program their chips accordingly.
137 */
138 dp->bridge_dev = NULL;
139
140 err = dsa_port_notify(dp, DSA_NOTIFIER_BRIDGE_LEAVE, &info);
141 if (err)
142 pr_err("DSA: failed to notify DSA_NOTIFIER_BRIDGE_LEAVE\n");
143
144 /* Port is leaving the bridge, disable flooding */
145 dsa_port_bridge_flags(dp, 0, NULL);
146
147 /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
148 * so allow it to be in BR_STATE_FORWARDING to be kept functional
149 */
150 dsa_port_set_state_now(dp, BR_STATE_FORWARDING);
151}
152
153static bool dsa_port_can_apply_vlan_filtering(struct dsa_port *dp,
154 bool vlan_filtering)
155{
156 struct dsa_switch *ds = dp->ds;
157 int i;
158
159 if (!ds->vlan_filtering_is_global)
160 return true;
161
162 /* For cases where enabling/disabling VLAN awareness is global to the
163 * switch, we need to handle the case where multiple bridges span
164 * different ports of the same switch device and one of them has a
165 * different setting than what is being requested.
166 */
167 for (i = 0; i < ds->num_ports; i++) {
168 struct net_device *other_bridge;
169
170 other_bridge = dsa_to_port(ds, i)->bridge_dev;
171 if (!other_bridge)
172 continue;
173 /* If it's the same bridge, it also has same
174 * vlan_filtering setting => no need to check
175 */
176 if (other_bridge == dp->bridge_dev)
177 continue;
178 if (br_vlan_enabled(other_bridge) != vlan_filtering) {
179 dev_err(ds->dev, "VLAN filtering is a global setting\n");
180 return false;
181 }
182 }
183 return true;
184}
185
186int dsa_port_vlan_filtering(struct dsa_port *dp, bool vlan_filtering,
187 struct switchdev_trans *trans)
188{
189 struct dsa_switch *ds = dp->ds;
190 int err;
191
192 /* bridge skips -EOPNOTSUPP, so skip the prepare phase */
193 if (switchdev_trans_ph_prepare(trans))
194 return 0;
195
196 if (!ds->ops->port_vlan_filtering)
197 return 0;
198
199 if (!dsa_port_can_apply_vlan_filtering(dp, vlan_filtering))
200 return -EINVAL;
201
202 if (dsa_port_is_vlan_filtering(dp) == vlan_filtering)
203 return 0;
204
205 err = ds->ops->port_vlan_filtering(ds, dp->index,
206 vlan_filtering);
207 if (err)
208 return err;
209
210 if (ds->vlan_filtering_is_global)
211 ds->vlan_filtering = vlan_filtering;
212 else
213 dp->vlan_filtering = vlan_filtering;
214 return 0;
215}
216
217int dsa_port_ageing_time(struct dsa_port *dp, clock_t ageing_clock,
218 struct switchdev_trans *trans)
219{
220 unsigned long ageing_jiffies = clock_t_to_jiffies(ageing_clock);
221 unsigned int ageing_time = jiffies_to_msecs(ageing_jiffies);
222 struct dsa_notifier_ageing_time_info info = {
223 .ageing_time = ageing_time,
224 .trans = trans,
225 };
226
227 if (switchdev_trans_ph_prepare(trans))
228 return dsa_port_notify(dp, DSA_NOTIFIER_AGEING_TIME, &info);
229
230 dp->ageing_time = ageing_time;
231
232 return dsa_port_notify(dp, DSA_NOTIFIER_AGEING_TIME, &info);
233}
234
235int dsa_port_pre_bridge_flags(const struct dsa_port *dp, unsigned long flags,
236 struct switchdev_trans *trans)
237{
238 struct dsa_switch *ds = dp->ds;
239
240 if (!ds->ops->port_egress_floods ||
241 (flags & ~(BR_FLOOD | BR_MCAST_FLOOD)))
242 return -EINVAL;
243
244 return 0;
245}
246
247int dsa_port_bridge_flags(const struct dsa_port *dp, unsigned long flags,
248 struct switchdev_trans *trans)
249{
250 struct dsa_switch *ds = dp->ds;
251 int port = dp->index;
252 int err = 0;
253
254 if (switchdev_trans_ph_prepare(trans))
255 return 0;
256
257 if (ds->ops->port_egress_floods)
258 err = ds->ops->port_egress_floods(ds, port, flags & BR_FLOOD,
259 flags & BR_MCAST_FLOOD);
260
261 return err;
262}
263
264int dsa_port_mrouter(struct dsa_port *dp, bool mrouter,
265 struct switchdev_trans *trans)
266{
267 struct dsa_switch *ds = dp->ds;
268 int port = dp->index;
269
270 if (switchdev_trans_ph_prepare(trans))
271 return ds->ops->port_egress_floods ? 0 : -EOPNOTSUPP;
272
273 return ds->ops->port_egress_floods(ds, port, true, mrouter);
274}
275
276int dsa_port_fdb_add(struct dsa_port *dp, const unsigned char *addr,
277 u16 vid)
278{
279 struct dsa_notifier_fdb_info info = {
280 .sw_index = dp->ds->index,
281 .port = dp->index,
282 .addr = addr,
283 .vid = vid,
284 };
285
286 return dsa_port_notify(dp, DSA_NOTIFIER_FDB_ADD, &info);
287}
288
289int dsa_port_fdb_del(struct dsa_port *dp, const unsigned char *addr,
290 u16 vid)
291{
292 struct dsa_notifier_fdb_info info = {
293 .sw_index = dp->ds->index,
294 .port = dp->index,
295 .addr = addr,
296 .vid = vid,
297
298 };
299
300 return dsa_port_notify(dp, DSA_NOTIFIER_FDB_DEL, &info);
301}
302
303int dsa_port_fdb_dump(struct dsa_port *dp, dsa_fdb_dump_cb_t *cb, void *data)
304{
305 struct dsa_switch *ds = dp->ds;
306 int port = dp->index;
307
308 if (!ds->ops->port_fdb_dump)
309 return -EOPNOTSUPP;
310
311 return ds->ops->port_fdb_dump(ds, port, cb, data);
312}
313
314int dsa_port_mdb_add(const struct dsa_port *dp,
315 const struct switchdev_obj_port_mdb *mdb,
316 struct switchdev_trans *trans)
317{
318 struct dsa_notifier_mdb_info info = {
319 .sw_index = dp->ds->index,
320 .port = dp->index,
321 .trans = trans,
322 .mdb = mdb,
323 };
324
325 return dsa_port_notify(dp, DSA_NOTIFIER_MDB_ADD, &info);
326}
327
328int dsa_port_mdb_del(const struct dsa_port *dp,
329 const struct switchdev_obj_port_mdb *mdb)
330{
331 struct dsa_notifier_mdb_info info = {
332 .sw_index = dp->ds->index,
333 .port = dp->index,
334 .mdb = mdb,
335 };
336
337 return dsa_port_notify(dp, DSA_NOTIFIER_MDB_DEL, &info);
338}
339
340int dsa_port_vlan_add(struct dsa_port *dp,
341 const struct switchdev_obj_port_vlan *vlan,
342 struct switchdev_trans *trans)
343{
344 struct dsa_notifier_vlan_info info = {
345 .sw_index = dp->ds->index,
346 .port = dp->index,
347 .trans = trans,
348 .vlan = vlan,
349 };
350
351 return dsa_port_notify(dp, DSA_NOTIFIER_VLAN_ADD, &info);
352}
353
354int dsa_port_vlan_del(struct dsa_port *dp,
355 const struct switchdev_obj_port_vlan *vlan)
356{
357 struct dsa_notifier_vlan_info info = {
358 .sw_index = dp->ds->index,
359 .port = dp->index,
360 .vlan = vlan,
361 };
362
363 return dsa_port_notify(dp, DSA_NOTIFIER_VLAN_DEL, &info);
364}
365
366int dsa_port_vid_add(struct dsa_port *dp, u16 vid, u16 flags)
367{
368 struct switchdev_obj_port_vlan vlan = {
369 .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN,
370 .flags = flags,
371 .vid_begin = vid,
372 .vid_end = vid,
373 };
374 struct switchdev_trans trans;
375 int err;
376
377 trans.ph_prepare = true;
378 err = dsa_port_vlan_add(dp, &vlan, &trans);
379 if (err)
380 return err;
381
382 trans.ph_prepare = false;
383 return dsa_port_vlan_add(dp, &vlan, &trans);
384}
385EXPORT_SYMBOL(dsa_port_vid_add);
386
387int dsa_port_vid_del(struct dsa_port *dp, u16 vid)
388{
389 struct switchdev_obj_port_vlan vlan = {
390 .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN,
391 .vid_begin = vid,
392 .vid_end = vid,
393 };
394
395 return dsa_port_vlan_del(dp, &vlan);
396}
397EXPORT_SYMBOL(dsa_port_vid_del);
398
399static struct phy_device *dsa_port_get_phy_device(struct dsa_port *dp)
400{
401 struct device_node *phy_dn;
402 struct phy_device *phydev;
403
404 phy_dn = of_parse_phandle(dp->dn, "phy-handle", 0);
405 if (!phy_dn)
406 return NULL;
407
408 phydev = of_phy_find_device(phy_dn);
409 if (!phydev) {
410 of_node_put(phy_dn);
411 return ERR_PTR(-EPROBE_DEFER);
412 }
413
414 of_node_put(phy_dn);
415 return phydev;
416}
417
418void dsa_port_phylink_validate(struct phylink_config *config,
419 unsigned long *supported,
420 struct phylink_link_state *state)
421{
422 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
423 struct dsa_switch *ds = dp->ds;
424
425 if (!ds->ops->phylink_validate)
426 return;
427
428 ds->ops->phylink_validate(ds, dp->index, supported, state);
429}
430EXPORT_SYMBOL_GPL(dsa_port_phylink_validate);
431
432int dsa_port_phylink_mac_link_state(struct phylink_config *config,
433 struct phylink_link_state *state)
434{
435 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
436 struct dsa_switch *ds = dp->ds;
437
438 /* Only called for SGMII and 802.3z */
439 if (!ds->ops->phylink_mac_link_state)
440 return -EOPNOTSUPP;
441
442 return ds->ops->phylink_mac_link_state(ds, dp->index, state);
443}
444EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_link_state);
445
446void dsa_port_phylink_mac_config(struct phylink_config *config,
447 unsigned int mode,
448 const struct phylink_link_state *state)
449{
450 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
451 struct dsa_switch *ds = dp->ds;
452
453 if (!ds->ops->phylink_mac_config)
454 return;
455
456 ds->ops->phylink_mac_config(ds, dp->index, mode, state);
457}
458EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_config);
459
460void dsa_port_phylink_mac_an_restart(struct phylink_config *config)
461{
462 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
463 struct dsa_switch *ds = dp->ds;
464
465 if (!ds->ops->phylink_mac_an_restart)
466 return;
467
468 ds->ops->phylink_mac_an_restart(ds, dp->index);
469}
470EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_an_restart);
471
472void dsa_port_phylink_mac_link_down(struct phylink_config *config,
473 unsigned int mode,
474 phy_interface_t interface)
475{
476 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
477 struct phy_device *phydev = NULL;
478 struct dsa_switch *ds = dp->ds;
479
480 if (dsa_is_user_port(ds, dp->index))
481 phydev = dp->slave->phydev;
482
483 if (!ds->ops->phylink_mac_link_down) {
484 if (ds->ops->adjust_link && phydev)
485 ds->ops->adjust_link(ds, dp->index, phydev);
486 return;
487 }
488
489 ds->ops->phylink_mac_link_down(ds, dp->index, mode, interface);
490}
491EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_link_down);
492
493void dsa_port_phylink_mac_link_up(struct phylink_config *config,
494 unsigned int mode,
495 phy_interface_t interface,
496 struct phy_device *phydev)
497{
498 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
499 struct dsa_switch *ds = dp->ds;
500
501 if (!ds->ops->phylink_mac_link_up) {
502 if (ds->ops->adjust_link && phydev)
503 ds->ops->adjust_link(ds, dp->index, phydev);
504 return;
505 }
506
507 ds->ops->phylink_mac_link_up(ds, dp->index, mode, interface, phydev);
508}
509EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_link_up);
510
511const struct phylink_mac_ops dsa_port_phylink_mac_ops = {
512 .validate = dsa_port_phylink_validate,
513 .mac_link_state = dsa_port_phylink_mac_link_state,
514 .mac_config = dsa_port_phylink_mac_config,
515 .mac_an_restart = dsa_port_phylink_mac_an_restart,
516 .mac_link_down = dsa_port_phylink_mac_link_down,
517 .mac_link_up = dsa_port_phylink_mac_link_up,
518};
519
520static int dsa_port_setup_phy_of(struct dsa_port *dp, bool enable)
521{
522 struct dsa_switch *ds = dp->ds;
523 struct phy_device *phydev;
524 int port = dp->index;
525 int err = 0;
526
527 phydev = dsa_port_get_phy_device(dp);
528 if (!phydev)
529 return 0;
530
531 if (IS_ERR(phydev))
532 return PTR_ERR(phydev);
533
534 if (enable) {
535 err = genphy_resume(phydev);
536 if (err < 0)
537 goto err_put_dev;
538
539 err = genphy_read_status(phydev);
540 if (err < 0)
541 goto err_put_dev;
542 } else {
543 err = genphy_suspend(phydev);
544 if (err < 0)
545 goto err_put_dev;
546 }
547
548 if (ds->ops->adjust_link)
549 ds->ops->adjust_link(ds, port, phydev);
550
551 dev_dbg(ds->dev, "enabled port's phy: %s", phydev_name(phydev));
552
553err_put_dev:
554 put_device(&phydev->mdio.dev);
555 return err;
556}
557
558static int dsa_port_fixed_link_register_of(struct dsa_port *dp)
559{
560 struct device_node *dn = dp->dn;
561 struct dsa_switch *ds = dp->ds;
562 struct phy_device *phydev;
563 int port = dp->index;
564 int mode;
565 int err;
566
567 err = of_phy_register_fixed_link(dn);
568 if (err) {
569 dev_err(ds->dev,
570 "failed to register the fixed PHY of port %d\n",
571 port);
572 return err;
573 }
574
575 phydev = of_phy_find_device(dn);
576
577 mode = of_get_phy_mode(dn);
578 if (mode < 0)
579 mode = PHY_INTERFACE_MODE_NA;
580 phydev->interface = mode;
581
582 genphy_read_status(phydev);
583
584 if (ds->ops->adjust_link)
585 ds->ops->adjust_link(ds, port, phydev);
586
587 put_device(&phydev->mdio.dev);
588
589 return 0;
590}
591
592static int dsa_port_phylink_register(struct dsa_port *dp)
593{
594 struct dsa_switch *ds = dp->ds;
595 struct device_node *port_dn = dp->dn;
596 int mode, err;
597
598 mode = of_get_phy_mode(port_dn);
599 if (mode < 0)
600 mode = PHY_INTERFACE_MODE_NA;
601
602 dp->pl_config.dev = ds->dev;
603 dp->pl_config.type = PHYLINK_DEV;
604
605 dp->pl = phylink_create(&dp->pl_config, of_fwnode_handle(port_dn),
606 mode, &dsa_port_phylink_mac_ops);
607 if (IS_ERR(dp->pl)) {
608 pr_err("error creating PHYLINK: %ld\n", PTR_ERR(dp->pl));
609 return PTR_ERR(dp->pl);
610 }
611
612 err = phylink_of_phy_connect(dp->pl, port_dn, 0);
613 if (err && err != -ENODEV) {
614 pr_err("could not attach to PHY: %d\n", err);
615 goto err_phy_connect;
616 }
617
618 rtnl_lock();
619 phylink_start(dp->pl);
620 rtnl_unlock();
621
622 return 0;
623
624err_phy_connect:
625 phylink_destroy(dp->pl);
626 return err;
627}
628
629int dsa_port_link_register_of(struct dsa_port *dp)
630{
631 struct dsa_switch *ds = dp->ds;
632
633 if (!ds->ops->adjust_link)
634 return dsa_port_phylink_register(dp);
635
636 dev_warn(ds->dev,
637 "Using legacy PHYLIB callbacks. Please migrate to PHYLINK!\n");
638
639 if (of_phy_is_fixed_link(dp->dn))
640 return dsa_port_fixed_link_register_of(dp);
641 else
642 return dsa_port_setup_phy_of(dp, true);
643}
644
645void dsa_port_link_unregister_of(struct dsa_port *dp)
646{
647 struct dsa_switch *ds = dp->ds;
648
649 if (!ds->ops->adjust_link) {
650 rtnl_lock();
651 phylink_disconnect_phy(dp->pl);
652 rtnl_unlock();
653 phylink_destroy(dp->pl);
654 return;
655 }
656
657 if (of_phy_is_fixed_link(dp->dn))
658 of_phy_deregister_fixed_link(dp->dn);
659 else
660 dsa_port_setup_phy_of(dp, false);
661}
662
663int dsa_port_get_phy_strings(struct dsa_port *dp, uint8_t *data)
664{
665 struct phy_device *phydev;
666 int ret = -EOPNOTSUPP;
667
668 if (of_phy_is_fixed_link(dp->dn))
669 return ret;
670
671 phydev = dsa_port_get_phy_device(dp);
672 if (IS_ERR_OR_NULL(phydev))
673 return ret;
674
675 ret = phy_ethtool_get_strings(phydev, data);
676 put_device(&phydev->mdio.dev);
677
678 return ret;
679}
680EXPORT_SYMBOL_GPL(dsa_port_get_phy_strings);
681
682int dsa_port_get_ethtool_phy_stats(struct dsa_port *dp, uint64_t *data)
683{
684 struct phy_device *phydev;
685 int ret = -EOPNOTSUPP;
686
687 if (of_phy_is_fixed_link(dp->dn))
688 return ret;
689
690 phydev = dsa_port_get_phy_device(dp);
691 if (IS_ERR_OR_NULL(phydev))
692 return ret;
693
694 ret = phy_ethtool_get_stats(phydev, NULL, data);
695 put_device(&phydev->mdio.dev);
696
697 return ret;
698}
699EXPORT_SYMBOL_GPL(dsa_port_get_ethtool_phy_stats);
700
701int dsa_port_get_phy_sset_count(struct dsa_port *dp)
702{
703 struct phy_device *phydev;
704 int ret = -EOPNOTSUPP;
705
706 if (of_phy_is_fixed_link(dp->dn))
707 return ret;
708
709 phydev = dsa_port_get_phy_device(dp);
710 if (IS_ERR_OR_NULL(phydev))
711 return ret;
712
713 ret = phy_ethtool_get_sset_count(phydev);
714 put_device(&phydev->mdio.dev);
715
716 return ret;
717}
718EXPORT_SYMBOL_GPL(dsa_port_get_phy_sset_count);