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1// SPDX-License-Identifier: GPL-2.0+
2/* Microchip Sparx5 Switch driver
3 *
4 * Copyright (c) 2021 Microchip Technology Inc. and its subsidiaries.
5 */
6
7#include <linux/if_bridge.h>
8#include <net/switchdev.h>
9
10#include "sparx5_main_regs.h"
11#include "sparx5_main.h"
12
13static struct workqueue_struct *sparx5_owq;
14
15struct sparx5_switchdev_event_work {
16 struct work_struct work;
17 struct switchdev_notifier_fdb_info fdb_info;
18 struct net_device *dev;
19 struct sparx5 *sparx5;
20 unsigned long event;
21};
22
23static int sparx5_port_attr_pre_bridge_flags(struct sparx5_port *port,
24 struct switchdev_brport_flags flags)
25{
26 if (flags.mask & ~(BR_FLOOD | BR_MCAST_FLOOD | BR_BCAST_FLOOD))
27 return -EINVAL;
28
29 return 0;
30}
31
32static void sparx5_port_update_mcast_ip_flood(struct sparx5_port *port, bool flood_flag)
33{
34 bool should_flood = flood_flag || port->is_mrouter;
35 int pgid;
36
37 for (pgid = PGID_IPV4_MC_DATA; pgid <= PGID_IPV6_MC_CTRL; pgid++)
38 sparx5_pgid_update_mask(port, pgid, should_flood);
39}
40
41static void sparx5_port_attr_bridge_flags(struct sparx5_port *port,
42 struct switchdev_brport_flags flags)
43{
44 if (flags.mask & BR_MCAST_FLOOD) {
45 sparx5_pgid_update_mask(port, PGID_MC_FLOOD, !!(flags.val & BR_MCAST_FLOOD));
46 sparx5_port_update_mcast_ip_flood(port, !!(flags.val & BR_MCAST_FLOOD));
47 }
48
49 if (flags.mask & BR_FLOOD)
50 sparx5_pgid_update_mask(port, PGID_UC_FLOOD, !!(flags.val & BR_FLOOD));
51 if (flags.mask & BR_BCAST_FLOOD)
52 sparx5_pgid_update_mask(port, PGID_BCAST, !!(flags.val & BR_BCAST_FLOOD));
53}
54
55static void sparx5_attr_stp_state_set(struct sparx5_port *port,
56 u8 state)
57{
58 struct sparx5 *sparx5 = port->sparx5;
59
60 if (!test_bit(port->portno, sparx5->bridge_mask)) {
61 netdev_err(port->ndev,
62 "Controlling non-bridged port %d?\n", port->portno);
63 return;
64 }
65
66 switch (state) {
67 case BR_STATE_FORWARDING:
68 set_bit(port->portno, sparx5->bridge_fwd_mask);
69 fallthrough;
70 case BR_STATE_LEARNING:
71 set_bit(port->portno, sparx5->bridge_lrn_mask);
72 break;
73
74 default:
75 /* All other states treated as blocking */
76 clear_bit(port->portno, sparx5->bridge_fwd_mask);
77 clear_bit(port->portno, sparx5->bridge_lrn_mask);
78 break;
79 }
80
81 /* apply the bridge_fwd_mask to all the ports */
82 sparx5_update_fwd(sparx5);
83}
84
85static void sparx5_port_attr_ageing_set(struct sparx5_port *port,
86 unsigned long ageing_clock_t)
87{
88 unsigned long ageing_jiffies = clock_t_to_jiffies(ageing_clock_t);
89 u32 ageing_time = jiffies_to_msecs(ageing_jiffies);
90
91 sparx5_set_ageing(port->sparx5, ageing_time);
92}
93
94static void sparx5_port_attr_mrouter_set(struct sparx5_port *port,
95 struct net_device *orig_dev,
96 bool enable)
97{
98 struct sparx5 *sparx5 = port->sparx5;
99 struct sparx5_mdb_entry *e;
100 bool flood_flag;
101
102 if ((enable && port->is_mrouter) || (!enable && !port->is_mrouter))
103 return;
104
105 /* Add/del mrouter port on all active mdb entries in HW.
106 * Don't change entry port mask, since that represents
107 * ports that actually joined that group.
108 */
109 mutex_lock(&sparx5->mdb_lock);
110 list_for_each_entry(e, &sparx5->mdb_entries, list) {
111 if (!test_bit(port->portno, e->port_mask) &&
112 ether_addr_is_ip_mcast(e->addr))
113 sparx5_pgid_update_mask(port, e->pgid_idx, enable);
114 }
115 mutex_unlock(&sparx5->mdb_lock);
116
117 /* Enable/disable flooding depending on if port is mrouter port
118 * or if mcast flood is enabled.
119 */
120 port->is_mrouter = enable;
121 flood_flag = br_port_flag_is_set(port->ndev, BR_MCAST_FLOOD);
122 sparx5_port_update_mcast_ip_flood(port, flood_flag);
123}
124
125static int sparx5_port_attr_set(struct net_device *dev, const void *ctx,
126 const struct switchdev_attr *attr,
127 struct netlink_ext_ack *extack)
128{
129 struct sparx5_port *port = netdev_priv(dev);
130
131 switch (attr->id) {
132 case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
133 return sparx5_port_attr_pre_bridge_flags(port,
134 attr->u.brport_flags);
135 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
136 sparx5_port_attr_bridge_flags(port, attr->u.brport_flags);
137 break;
138 case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
139 sparx5_attr_stp_state_set(port, attr->u.stp_state);
140 break;
141 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
142 sparx5_port_attr_ageing_set(port, attr->u.ageing_time);
143 break;
144 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
145 /* Used PVID 1 when default_pvid is 0, to avoid
146 * collision with non-bridged ports.
147 */
148 if (port->pvid == 0)
149 port->pvid = 1;
150 port->vlan_aware = attr->u.vlan_filtering;
151 sparx5_vlan_port_apply(port->sparx5, port);
152 break;
153 case SWITCHDEV_ATTR_ID_PORT_MROUTER:
154 sparx5_port_attr_mrouter_set(port,
155 attr->orig_dev,
156 attr->u.mrouter);
157 break;
158 default:
159 return -EOPNOTSUPP;
160 }
161
162 return 0;
163}
164
165static int sparx5_port_bridge_join(struct sparx5_port *port,
166 struct net_device *bridge,
167 struct netlink_ext_ack *extack)
168{
169 struct sparx5 *sparx5 = port->sparx5;
170 struct net_device *ndev = port->ndev;
171 int err;
172
173 if (bitmap_empty(sparx5->bridge_mask, SPX5_PORTS))
174 /* First bridged port */
175 sparx5->hw_bridge_dev = bridge;
176 else
177 if (sparx5->hw_bridge_dev != bridge)
178 /* This is adding the port to a second bridge, this is
179 * unsupported
180 */
181 return -ENODEV;
182
183 set_bit(port->portno, sparx5->bridge_mask);
184
185 err = switchdev_bridge_port_offload(ndev, ndev, NULL, NULL, NULL,
186 false, extack);
187 if (err)
188 goto err_switchdev_offload;
189
190 /* Remove standalone port entry */
191 sparx5_mact_forget(sparx5, ndev->dev_addr, 0);
192
193 /* Port enters in bridge mode therefor don't need to copy to CPU
194 * frames for multicast in case the bridge is not requesting them
195 */
196 __dev_mc_unsync(ndev, sparx5_mc_unsync);
197
198 return 0;
199
200err_switchdev_offload:
201 clear_bit(port->portno, sparx5->bridge_mask);
202 return err;
203}
204
205static void sparx5_port_bridge_leave(struct sparx5_port *port,
206 struct net_device *bridge)
207{
208 struct sparx5 *sparx5 = port->sparx5;
209
210 switchdev_bridge_port_unoffload(port->ndev, NULL, NULL, NULL);
211
212 clear_bit(port->portno, sparx5->bridge_mask);
213 if (bitmap_empty(sparx5->bridge_mask, SPX5_PORTS))
214 sparx5->hw_bridge_dev = NULL;
215
216 /* Clear bridge vlan settings before updating the port settings */
217 port->vlan_aware = 0;
218 port->pvid = NULL_VID;
219 port->vid = NULL_VID;
220
221 /* Forward frames to CPU */
222 sparx5_mact_learn(sparx5, PGID_CPU, port->ndev->dev_addr, 0);
223
224 /* Port enters in host more therefore restore mc list */
225 __dev_mc_sync(port->ndev, sparx5_mc_sync, sparx5_mc_unsync);
226}
227
228static int sparx5_port_changeupper(struct net_device *dev,
229 struct netdev_notifier_changeupper_info *info)
230{
231 struct sparx5_port *port = netdev_priv(dev);
232 struct netlink_ext_ack *extack;
233 int err = 0;
234
235 extack = netdev_notifier_info_to_extack(&info->info);
236
237 if (netif_is_bridge_master(info->upper_dev)) {
238 if (info->linking)
239 err = sparx5_port_bridge_join(port, info->upper_dev,
240 extack);
241 else
242 sparx5_port_bridge_leave(port, info->upper_dev);
243
244 sparx5_vlan_port_apply(port->sparx5, port);
245 }
246
247 return err;
248}
249
250static int sparx5_port_add_addr(struct net_device *dev, bool up)
251{
252 struct sparx5_port *port = netdev_priv(dev);
253 struct sparx5 *sparx5 = port->sparx5;
254 u16 vid = port->pvid;
255
256 if (up)
257 sparx5_mact_learn(sparx5, PGID_CPU, port->ndev->dev_addr, vid);
258 else
259 sparx5_mact_forget(sparx5, port->ndev->dev_addr, vid);
260
261 return 0;
262}
263
264static int sparx5_netdevice_port_event(struct net_device *dev,
265 struct notifier_block *nb,
266 unsigned long event, void *ptr)
267{
268 int err = 0;
269
270 if (!sparx5_netdevice_check(dev))
271 return 0;
272
273 switch (event) {
274 case NETDEV_CHANGEUPPER:
275 err = sparx5_port_changeupper(dev, ptr);
276 break;
277 case NETDEV_PRE_UP:
278 err = sparx5_port_add_addr(dev, true);
279 break;
280 case NETDEV_DOWN:
281 err = sparx5_port_add_addr(dev, false);
282 break;
283 }
284
285 return err;
286}
287
288static int sparx5_netdevice_event(struct notifier_block *nb,
289 unsigned long event, void *ptr)
290{
291 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
292 int ret = 0;
293
294 ret = sparx5_netdevice_port_event(dev, nb, event, ptr);
295
296 return notifier_from_errno(ret);
297}
298
299static void sparx5_switchdev_bridge_fdb_event_work(struct work_struct *work)
300{
301 struct sparx5_switchdev_event_work *switchdev_work =
302 container_of(work, struct sparx5_switchdev_event_work, work);
303 struct net_device *dev = switchdev_work->dev;
304 struct switchdev_notifier_fdb_info *fdb_info;
305 struct sparx5_port *port;
306 struct sparx5 *sparx5;
307 bool host_addr;
308 u16 vid;
309
310 rtnl_lock();
311 if (!sparx5_netdevice_check(dev)) {
312 host_addr = true;
313 sparx5 = switchdev_work->sparx5;
314 } else {
315 host_addr = false;
316 sparx5 = switchdev_work->sparx5;
317 port = netdev_priv(dev);
318 }
319
320 fdb_info = &switchdev_work->fdb_info;
321
322 /* Used PVID 1 when default_pvid is 0, to avoid
323 * collision with non-bridged ports.
324 */
325 if (fdb_info->vid == 0)
326 vid = 1;
327 else
328 vid = fdb_info->vid;
329
330 switch (switchdev_work->event) {
331 case SWITCHDEV_FDB_ADD_TO_DEVICE:
332 if (host_addr)
333 sparx5_add_mact_entry(sparx5, dev, PGID_CPU,
334 fdb_info->addr, vid);
335 else
336 sparx5_add_mact_entry(sparx5, port->ndev, port->portno,
337 fdb_info->addr, vid);
338 break;
339 case SWITCHDEV_FDB_DEL_TO_DEVICE:
340 sparx5_del_mact_entry(sparx5, fdb_info->addr, vid);
341 break;
342 }
343
344 rtnl_unlock();
345 kfree(switchdev_work->fdb_info.addr);
346 kfree(switchdev_work);
347 dev_put(dev);
348}
349
350static void sparx5_schedule_work(struct work_struct *work)
351{
352 queue_work(sparx5_owq, work);
353}
354
355static int sparx5_switchdev_event(struct notifier_block *nb,
356 unsigned long event, void *ptr)
357{
358 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
359 struct sparx5_switchdev_event_work *switchdev_work;
360 struct switchdev_notifier_fdb_info *fdb_info;
361 struct switchdev_notifier_info *info = ptr;
362 struct sparx5 *spx5;
363 int err;
364
365 spx5 = container_of(nb, struct sparx5, switchdev_nb);
366
367 switch (event) {
368 case SWITCHDEV_PORT_ATTR_SET:
369 err = switchdev_handle_port_attr_set(dev, ptr,
370 sparx5_netdevice_check,
371 sparx5_port_attr_set);
372 return notifier_from_errno(err);
373 case SWITCHDEV_FDB_ADD_TO_DEVICE:
374 fallthrough;
375 case SWITCHDEV_FDB_DEL_TO_DEVICE:
376 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
377 if (!switchdev_work)
378 return NOTIFY_BAD;
379
380 switchdev_work->dev = dev;
381 switchdev_work->event = event;
382 switchdev_work->sparx5 = spx5;
383
384 fdb_info = container_of(info,
385 struct switchdev_notifier_fdb_info,
386 info);
387 INIT_WORK(&switchdev_work->work,
388 sparx5_switchdev_bridge_fdb_event_work);
389 memcpy(&switchdev_work->fdb_info, ptr,
390 sizeof(switchdev_work->fdb_info));
391 switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC);
392 if (!switchdev_work->fdb_info.addr)
393 goto err_addr_alloc;
394
395 ether_addr_copy((u8 *)switchdev_work->fdb_info.addr,
396 fdb_info->addr);
397 dev_hold(dev);
398
399 sparx5_schedule_work(&switchdev_work->work);
400 break;
401 }
402
403 return NOTIFY_DONE;
404err_addr_alloc:
405 kfree(switchdev_work);
406 return NOTIFY_BAD;
407}
408
409static int sparx5_handle_port_vlan_add(struct net_device *dev,
410 struct notifier_block *nb,
411 const struct switchdev_obj_port_vlan *v)
412{
413 struct sparx5_port *port = netdev_priv(dev);
414
415 if (netif_is_bridge_master(dev)) {
416 struct sparx5 *sparx5 =
417 container_of(nb, struct sparx5,
418 switchdev_blocking_nb);
419
420 /* Flood broadcast to CPU */
421 sparx5_mact_learn(sparx5, PGID_BCAST, dev->broadcast,
422 v->vid);
423 return 0;
424 }
425
426 if (!sparx5_netdevice_check(dev))
427 return -EOPNOTSUPP;
428
429 return sparx5_vlan_vid_add(port, v->vid,
430 v->flags & BRIDGE_VLAN_INFO_PVID,
431 v->flags & BRIDGE_VLAN_INFO_UNTAGGED);
432}
433
434static int sparx5_alloc_mdb_entry(struct sparx5 *sparx5,
435 const unsigned char *addr,
436 u16 vid,
437 struct sparx5_mdb_entry **entry_out)
438{
439 struct sparx5_mdb_entry *entry;
440 u16 pgid_idx;
441 int err;
442
443 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
444 if (!entry)
445 return -ENOMEM;
446
447 err = sparx5_pgid_alloc_mcast(sparx5, &pgid_idx);
448 if (err) {
449 kfree(entry);
450 return err;
451 }
452
453 memcpy(entry->addr, addr, ETH_ALEN);
454 entry->vid = vid;
455 entry->pgid_idx = pgid_idx;
456
457 mutex_lock(&sparx5->mdb_lock);
458 list_add_tail(&entry->list, &sparx5->mdb_entries);
459 mutex_unlock(&sparx5->mdb_lock);
460
461 *entry_out = entry;
462 return 0;
463}
464
465static void sparx5_free_mdb_entry(struct sparx5 *sparx5,
466 const unsigned char *addr,
467 u16 vid)
468{
469 struct sparx5_mdb_entry *entry, *tmp;
470
471 mutex_lock(&sparx5->mdb_lock);
472 list_for_each_entry_safe(entry, tmp, &sparx5->mdb_entries, list) {
473 if ((vid == 0 || entry->vid == vid) &&
474 ether_addr_equal(addr, entry->addr)) {
475 list_del(&entry->list);
476
477 sparx5_pgid_free(sparx5, entry->pgid_idx);
478 kfree(entry);
479 goto out;
480 }
481 }
482
483out:
484 mutex_unlock(&sparx5->mdb_lock);
485}
486
487static struct sparx5_mdb_entry *sparx5_mdb_get_entry(struct sparx5 *sparx5,
488 const unsigned char *addr,
489 u16 vid)
490{
491 struct sparx5_mdb_entry *e, *found = NULL;
492
493 mutex_lock(&sparx5->mdb_lock);
494 list_for_each_entry(e, &sparx5->mdb_entries, list) {
495 if (ether_addr_equal(e->addr, addr) && e->vid == vid) {
496 found = e;
497 goto out;
498 }
499 }
500
501out:
502 mutex_unlock(&sparx5->mdb_lock);
503 return found;
504}
505
506static void sparx5_cpu_copy_ena(struct sparx5 *spx5, u16 pgid, bool enable)
507{
508 spx5_rmw(ANA_AC_PGID_MISC_CFG_PGID_CPU_COPY_ENA_SET(enable),
509 ANA_AC_PGID_MISC_CFG_PGID_CPU_COPY_ENA, spx5,
510 ANA_AC_PGID_MISC_CFG(pgid));
511}
512
513static int sparx5_handle_port_mdb_add(struct net_device *dev,
514 struct notifier_block *nb,
515 const struct switchdev_obj_port_mdb *v)
516{
517 struct sparx5_port *port = netdev_priv(dev);
518 struct sparx5 *spx5 = port->sparx5;
519 struct sparx5_mdb_entry *entry;
520 bool is_host, is_new;
521 int err, i;
522 u16 vid;
523
524 if (!sparx5_netdevice_check(dev))
525 return -EOPNOTSUPP;
526
527 is_host = netif_is_bridge_master(v->obj.orig_dev);
528
529 /* When VLAN unaware the vlan value is not parsed and we receive vid 0.
530 * Fall back to bridge vid 1.
531 */
532 if (!br_vlan_enabled(spx5->hw_bridge_dev))
533 vid = 1;
534 else
535 vid = v->vid;
536
537 is_new = false;
538 entry = sparx5_mdb_get_entry(spx5, v->addr, vid);
539 if (!entry) {
540 err = sparx5_alloc_mdb_entry(spx5, v->addr, vid, &entry);
541 is_new = true;
542 if (err)
543 return err;
544 }
545
546 mutex_lock(&spx5->mdb_lock);
547
548 /* Add any mrouter ports to the new entry */
549 if (is_new && ether_addr_is_ip_mcast(v->addr))
550 for (i = 0; i < SPX5_PORTS; i++)
551 if (spx5->ports[i] && spx5->ports[i]->is_mrouter)
552 sparx5_pgid_update_mask(spx5->ports[i],
553 entry->pgid_idx,
554 true);
555
556 if (is_host && !entry->cpu_copy) {
557 sparx5_cpu_copy_ena(spx5, entry->pgid_idx, true);
558 entry->cpu_copy = true;
559 } else if (!is_host) {
560 sparx5_pgid_update_mask(port, entry->pgid_idx, true);
561 set_bit(port->portno, entry->port_mask);
562 }
563 mutex_unlock(&spx5->mdb_lock);
564
565 sparx5_mact_learn(spx5, entry->pgid_idx, entry->addr, entry->vid);
566
567 return 0;
568}
569
570static int sparx5_handle_port_mdb_del(struct net_device *dev,
571 struct notifier_block *nb,
572 const struct switchdev_obj_port_mdb *v)
573{
574 struct sparx5_port *port = netdev_priv(dev);
575 struct sparx5 *spx5 = port->sparx5;
576 struct sparx5_mdb_entry *entry;
577 bool is_host;
578 u16 vid;
579
580 if (!sparx5_netdevice_check(dev))
581 return -EOPNOTSUPP;
582
583 is_host = netif_is_bridge_master(v->obj.orig_dev);
584
585 if (!br_vlan_enabled(spx5->hw_bridge_dev))
586 vid = 1;
587 else
588 vid = v->vid;
589
590 entry = sparx5_mdb_get_entry(spx5, v->addr, vid);
591 if (!entry)
592 return 0;
593
594 mutex_lock(&spx5->mdb_lock);
595 if (is_host && entry->cpu_copy) {
596 sparx5_cpu_copy_ena(spx5, entry->pgid_idx, false);
597 entry->cpu_copy = false;
598 } else if (!is_host) {
599 clear_bit(port->portno, entry->port_mask);
600
601 /* Port not mrouter port or addr is L2 mcast, remove port from mask. */
602 if (!port->is_mrouter || !ether_addr_is_ip_mcast(v->addr))
603 sparx5_pgid_update_mask(port, entry->pgid_idx, false);
604 }
605 mutex_unlock(&spx5->mdb_lock);
606
607 if (bitmap_empty(entry->port_mask, SPX5_PORTS) && !entry->cpu_copy) {
608 /* Clear pgid in case mrouter ports exists
609 * that are not part of the group.
610 */
611 sparx5_pgid_clear(spx5, entry->pgid_idx);
612 sparx5_mact_forget(spx5, entry->addr, entry->vid);
613 sparx5_free_mdb_entry(spx5, entry->addr, entry->vid);
614 }
615 return 0;
616}
617
618static int sparx5_handle_port_obj_add(struct net_device *dev,
619 struct notifier_block *nb,
620 struct switchdev_notifier_port_obj_info *info)
621{
622 const struct switchdev_obj *obj = info->obj;
623 int err;
624
625 switch (obj->id) {
626 case SWITCHDEV_OBJ_ID_PORT_VLAN:
627 err = sparx5_handle_port_vlan_add(dev, nb,
628 SWITCHDEV_OBJ_PORT_VLAN(obj));
629 break;
630 case SWITCHDEV_OBJ_ID_PORT_MDB:
631 case SWITCHDEV_OBJ_ID_HOST_MDB:
632 err = sparx5_handle_port_mdb_add(dev, nb,
633 SWITCHDEV_OBJ_PORT_MDB(obj));
634 break;
635 default:
636 err = -EOPNOTSUPP;
637 break;
638 }
639
640 info->handled = true;
641 return err;
642}
643
644static int sparx5_handle_port_vlan_del(struct net_device *dev,
645 struct notifier_block *nb,
646 u16 vid)
647{
648 struct sparx5_port *port = netdev_priv(dev);
649 int ret;
650
651 /* Master bridge? */
652 if (netif_is_bridge_master(dev)) {
653 struct sparx5 *sparx5 =
654 container_of(nb, struct sparx5,
655 switchdev_blocking_nb);
656
657 sparx5_mact_forget(sparx5, dev->broadcast, vid);
658 return 0;
659 }
660
661 if (!sparx5_netdevice_check(dev))
662 return -EOPNOTSUPP;
663
664 ret = sparx5_vlan_vid_del(port, vid);
665 if (ret)
666 return ret;
667
668 return 0;
669}
670
671static int sparx5_handle_port_obj_del(struct net_device *dev,
672 struct notifier_block *nb,
673 struct switchdev_notifier_port_obj_info *info)
674{
675 const struct switchdev_obj *obj = info->obj;
676 int err;
677
678 switch (obj->id) {
679 case SWITCHDEV_OBJ_ID_PORT_VLAN:
680 err = sparx5_handle_port_vlan_del(dev, nb,
681 SWITCHDEV_OBJ_PORT_VLAN(obj)->vid);
682 break;
683 case SWITCHDEV_OBJ_ID_PORT_MDB:
684 case SWITCHDEV_OBJ_ID_HOST_MDB:
685 err = sparx5_handle_port_mdb_del(dev, nb,
686 SWITCHDEV_OBJ_PORT_MDB(obj));
687 break;
688 default:
689 err = -EOPNOTSUPP;
690 break;
691 }
692
693 info->handled = true;
694 return err;
695}
696
697static int sparx5_switchdev_blocking_event(struct notifier_block *nb,
698 unsigned long event,
699 void *ptr)
700{
701 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
702 int err;
703
704 switch (event) {
705 case SWITCHDEV_PORT_OBJ_ADD:
706 err = sparx5_handle_port_obj_add(dev, nb, ptr);
707 return notifier_from_errno(err);
708 case SWITCHDEV_PORT_OBJ_DEL:
709 err = sparx5_handle_port_obj_del(dev, nb, ptr);
710 return notifier_from_errno(err);
711 case SWITCHDEV_PORT_ATTR_SET:
712 err = switchdev_handle_port_attr_set(dev, ptr,
713 sparx5_netdevice_check,
714 sparx5_port_attr_set);
715 return notifier_from_errno(err);
716 }
717
718 return NOTIFY_DONE;
719}
720
721int sparx5_register_notifier_blocks(struct sparx5 *s5)
722{
723 int err;
724
725 s5->netdevice_nb.notifier_call = sparx5_netdevice_event;
726 err = register_netdevice_notifier(&s5->netdevice_nb);
727 if (err)
728 return err;
729
730 s5->switchdev_nb.notifier_call = sparx5_switchdev_event;
731 err = register_switchdev_notifier(&s5->switchdev_nb);
732 if (err)
733 goto err_switchdev_nb;
734
735 s5->switchdev_blocking_nb.notifier_call = sparx5_switchdev_blocking_event;
736 err = register_switchdev_blocking_notifier(&s5->switchdev_blocking_nb);
737 if (err)
738 goto err_switchdev_blocking_nb;
739
740 sparx5_owq = alloc_ordered_workqueue("sparx5_order", 0);
741 if (!sparx5_owq) {
742 err = -ENOMEM;
743 goto err_switchdev_blocking_nb;
744 }
745
746 return 0;
747
748err_switchdev_blocking_nb:
749 unregister_switchdev_notifier(&s5->switchdev_nb);
750err_switchdev_nb:
751 unregister_netdevice_notifier(&s5->netdevice_nb);
752
753 return err;
754}
755
756void sparx5_unregister_notifier_blocks(struct sparx5 *s5)
757{
758 destroy_workqueue(sparx5_owq);
759
760 unregister_switchdev_blocking_notifier(&s5->switchdev_blocking_nb);
761 unregister_switchdev_notifier(&s5->switchdev_nb);
762 unregister_netdevice_notifier(&s5->netdevice_nb);
763}
1// SPDX-License-Identifier: GPL-2.0+
2/* Microchip Sparx5 Switch driver
3 *
4 * Copyright (c) 2021 Microchip Technology Inc. and its subsidiaries.
5 */
6
7#include <linux/if_bridge.h>
8#include <net/switchdev.h>
9
10#include "sparx5_main_regs.h"
11#include "sparx5_main.h"
12
13static struct workqueue_struct *sparx5_owq;
14
15struct sparx5_switchdev_event_work {
16 struct work_struct work;
17 struct switchdev_notifier_fdb_info fdb_info;
18 struct net_device *dev;
19 unsigned long event;
20};
21
22static void sparx5_port_attr_bridge_flags(struct sparx5_port *port,
23 struct switchdev_brport_flags flags)
24{
25 if (flags.mask & BR_MCAST_FLOOD)
26 sparx5_pgid_update_mask(port, PGID_MC_FLOOD, true);
27}
28
29static void sparx5_attr_stp_state_set(struct sparx5_port *port,
30 u8 state)
31{
32 struct sparx5 *sparx5 = port->sparx5;
33
34 if (!test_bit(port->portno, sparx5->bridge_mask)) {
35 netdev_err(port->ndev,
36 "Controlling non-bridged port %d?\n", port->portno);
37 return;
38 }
39
40 switch (state) {
41 case BR_STATE_FORWARDING:
42 set_bit(port->portno, sparx5->bridge_fwd_mask);
43 fallthrough;
44 case BR_STATE_LEARNING:
45 set_bit(port->portno, sparx5->bridge_lrn_mask);
46 break;
47
48 default:
49 /* All other states treated as blocking */
50 clear_bit(port->portno, sparx5->bridge_fwd_mask);
51 clear_bit(port->portno, sparx5->bridge_lrn_mask);
52 break;
53 }
54
55 /* apply the bridge_fwd_mask to all the ports */
56 sparx5_update_fwd(sparx5);
57}
58
59static void sparx5_port_attr_ageing_set(struct sparx5_port *port,
60 unsigned long ageing_clock_t)
61{
62 unsigned long ageing_jiffies = clock_t_to_jiffies(ageing_clock_t);
63 u32 ageing_time = jiffies_to_msecs(ageing_jiffies);
64
65 sparx5_set_ageing(port->sparx5, ageing_time);
66}
67
68static int sparx5_port_attr_set(struct net_device *dev, const void *ctx,
69 const struct switchdev_attr *attr,
70 struct netlink_ext_ack *extack)
71{
72 struct sparx5_port *port = netdev_priv(dev);
73
74 switch (attr->id) {
75 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
76 sparx5_port_attr_bridge_flags(port, attr->u.brport_flags);
77 break;
78 case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
79 sparx5_attr_stp_state_set(port, attr->u.stp_state);
80 break;
81 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
82 sparx5_port_attr_ageing_set(port, attr->u.ageing_time);
83 break;
84 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
85 port->vlan_aware = attr->u.vlan_filtering;
86 sparx5_vlan_port_apply(port->sparx5, port);
87 break;
88 default:
89 return -EOPNOTSUPP;
90 }
91
92 return 0;
93}
94
95static int sparx5_port_bridge_join(struct sparx5_port *port,
96 struct net_device *bridge)
97{
98 struct sparx5 *sparx5 = port->sparx5;
99
100 if (bitmap_empty(sparx5->bridge_mask, SPX5_PORTS))
101 /* First bridged port */
102 sparx5->hw_bridge_dev = bridge;
103 else
104 if (sparx5->hw_bridge_dev != bridge)
105 /* This is adding the port to a second bridge, this is
106 * unsupported
107 */
108 return -ENODEV;
109
110 set_bit(port->portno, sparx5->bridge_mask);
111
112 /* Port enters in bridge mode therefor don't need to copy to CPU
113 * frames for multicast in case the bridge is not requesting them
114 */
115 __dev_mc_unsync(port->ndev, sparx5_mc_unsync);
116
117 return 0;
118}
119
120static void sparx5_port_bridge_leave(struct sparx5_port *port,
121 struct net_device *bridge)
122{
123 struct sparx5 *sparx5 = port->sparx5;
124
125 clear_bit(port->portno, sparx5->bridge_mask);
126 if (bitmap_empty(sparx5->bridge_mask, SPX5_PORTS))
127 sparx5->hw_bridge_dev = NULL;
128
129 /* Clear bridge vlan settings before updating the port settings */
130 port->vlan_aware = 0;
131 port->pvid = NULL_VID;
132 port->vid = NULL_VID;
133
134 /* Port enters in host more therefore restore mc list */
135 __dev_mc_sync(port->ndev, sparx5_mc_sync, sparx5_mc_unsync);
136}
137
138static int sparx5_port_changeupper(struct net_device *dev,
139 struct netdev_notifier_changeupper_info *info)
140{
141 struct sparx5_port *port = netdev_priv(dev);
142 int err = 0;
143
144 if (netif_is_bridge_master(info->upper_dev)) {
145 if (info->linking)
146 err = sparx5_port_bridge_join(port, info->upper_dev);
147 else
148 sparx5_port_bridge_leave(port, info->upper_dev);
149
150 sparx5_vlan_port_apply(port->sparx5, port);
151 }
152
153 return err;
154}
155
156static int sparx5_port_add_addr(struct net_device *dev, bool up)
157{
158 struct sparx5_port *port = netdev_priv(dev);
159 struct sparx5 *sparx5 = port->sparx5;
160 u16 vid = port->pvid;
161
162 if (up)
163 sparx5_mact_learn(sparx5, PGID_CPU, port->ndev->dev_addr, vid);
164 else
165 sparx5_mact_forget(sparx5, port->ndev->dev_addr, vid);
166
167 return 0;
168}
169
170static int sparx5_netdevice_port_event(struct net_device *dev,
171 struct notifier_block *nb,
172 unsigned long event, void *ptr)
173{
174 int err = 0;
175
176 if (!sparx5_netdevice_check(dev))
177 return 0;
178
179 switch (event) {
180 case NETDEV_CHANGEUPPER:
181 err = sparx5_port_changeupper(dev, ptr);
182 break;
183 case NETDEV_PRE_UP:
184 err = sparx5_port_add_addr(dev, true);
185 break;
186 case NETDEV_DOWN:
187 err = sparx5_port_add_addr(dev, false);
188 break;
189 }
190
191 return err;
192}
193
194static int sparx5_netdevice_event(struct notifier_block *nb,
195 unsigned long event, void *ptr)
196{
197 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
198 int ret = 0;
199
200 ret = sparx5_netdevice_port_event(dev, nb, event, ptr);
201
202 return notifier_from_errno(ret);
203}
204
205static void sparx5_switchdev_bridge_fdb_event_work(struct work_struct *work)
206{
207 struct sparx5_switchdev_event_work *switchdev_work =
208 container_of(work, struct sparx5_switchdev_event_work, work);
209 struct net_device *dev = switchdev_work->dev;
210 struct switchdev_notifier_fdb_info *fdb_info;
211 struct sparx5_port *port;
212 struct sparx5 *sparx5;
213
214 rtnl_lock();
215 if (!sparx5_netdevice_check(dev))
216 goto out;
217
218 port = netdev_priv(dev);
219 sparx5 = port->sparx5;
220
221 fdb_info = &switchdev_work->fdb_info;
222
223 switch (switchdev_work->event) {
224 case SWITCHDEV_FDB_ADD_TO_DEVICE:
225 if (!fdb_info->added_by_user)
226 break;
227 sparx5_add_mact_entry(sparx5, port, fdb_info->addr,
228 fdb_info->vid);
229 break;
230 case SWITCHDEV_FDB_DEL_TO_DEVICE:
231 if (!fdb_info->added_by_user)
232 break;
233 sparx5_del_mact_entry(sparx5, fdb_info->addr, fdb_info->vid);
234 break;
235 }
236
237out:
238 rtnl_unlock();
239 kfree(switchdev_work->fdb_info.addr);
240 kfree(switchdev_work);
241 dev_put(dev);
242}
243
244static void sparx5_schedule_work(struct work_struct *work)
245{
246 queue_work(sparx5_owq, work);
247}
248
249static int sparx5_switchdev_event(struct notifier_block *unused,
250 unsigned long event, void *ptr)
251{
252 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
253 struct sparx5_switchdev_event_work *switchdev_work;
254 struct switchdev_notifier_fdb_info *fdb_info;
255 struct switchdev_notifier_info *info = ptr;
256 int err;
257
258 switch (event) {
259 case SWITCHDEV_PORT_ATTR_SET:
260 err = switchdev_handle_port_attr_set(dev, ptr,
261 sparx5_netdevice_check,
262 sparx5_port_attr_set);
263 return notifier_from_errno(err);
264 case SWITCHDEV_FDB_ADD_TO_DEVICE:
265 fallthrough;
266 case SWITCHDEV_FDB_DEL_TO_DEVICE:
267 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
268 if (!switchdev_work)
269 return NOTIFY_BAD;
270
271 switchdev_work->dev = dev;
272 switchdev_work->event = event;
273
274 fdb_info = container_of(info,
275 struct switchdev_notifier_fdb_info,
276 info);
277 INIT_WORK(&switchdev_work->work,
278 sparx5_switchdev_bridge_fdb_event_work);
279 memcpy(&switchdev_work->fdb_info, ptr,
280 sizeof(switchdev_work->fdb_info));
281 switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC);
282 if (!switchdev_work->fdb_info.addr)
283 goto err_addr_alloc;
284
285 ether_addr_copy((u8 *)switchdev_work->fdb_info.addr,
286 fdb_info->addr);
287 dev_hold(dev);
288
289 sparx5_schedule_work(&switchdev_work->work);
290 break;
291 }
292
293 return NOTIFY_DONE;
294err_addr_alloc:
295 kfree(switchdev_work);
296 return NOTIFY_BAD;
297}
298
299static void sparx5_sync_port_dev_addr(struct sparx5 *sparx5,
300 struct sparx5_port *port,
301 u16 vid, bool add)
302{
303 if (!port ||
304 !test_bit(port->portno, sparx5->bridge_mask))
305 return; /* Skip null/host interfaces */
306
307 /* Bridge connects to vid? */
308 if (add) {
309 /* Add port MAC address from the VLAN */
310 sparx5_mact_learn(sparx5, PGID_CPU,
311 port->ndev->dev_addr, vid);
312 } else {
313 /* Control port addr visibility depending on
314 * port VLAN connectivity.
315 */
316 if (test_bit(port->portno, sparx5->vlan_mask[vid]))
317 sparx5_mact_learn(sparx5, PGID_CPU,
318 port->ndev->dev_addr, vid);
319 else
320 sparx5_mact_forget(sparx5,
321 port->ndev->dev_addr, vid);
322 }
323}
324
325static void sparx5_sync_bridge_dev_addr(struct net_device *dev,
326 struct sparx5 *sparx5,
327 u16 vid, bool add)
328{
329 int i;
330
331 /* First, handle bridge address'es */
332 if (add) {
333 sparx5_mact_learn(sparx5, PGID_CPU, dev->dev_addr,
334 vid);
335 sparx5_mact_learn(sparx5, PGID_BCAST, dev->broadcast,
336 vid);
337 } else {
338 sparx5_mact_forget(sparx5, dev->dev_addr, vid);
339 sparx5_mact_forget(sparx5, dev->broadcast, vid);
340 }
341
342 /* Now look at bridged ports */
343 for (i = 0; i < SPX5_PORTS; i++)
344 sparx5_sync_port_dev_addr(sparx5, sparx5->ports[i], vid, add);
345}
346
347static int sparx5_handle_port_vlan_add(struct net_device *dev,
348 struct notifier_block *nb,
349 const struct switchdev_obj_port_vlan *v)
350{
351 struct sparx5_port *port = netdev_priv(dev);
352
353 if (netif_is_bridge_master(dev)) {
354 if (v->flags & BRIDGE_VLAN_INFO_BRENTRY) {
355 struct sparx5 *sparx5 =
356 container_of(nb, struct sparx5,
357 switchdev_blocking_nb);
358
359 sparx5_sync_bridge_dev_addr(dev, sparx5, v->vid, true);
360 }
361 return 0;
362 }
363
364 if (!sparx5_netdevice_check(dev))
365 return -EOPNOTSUPP;
366
367 return sparx5_vlan_vid_add(port, v->vid,
368 v->flags & BRIDGE_VLAN_INFO_PVID,
369 v->flags & BRIDGE_VLAN_INFO_UNTAGGED);
370}
371
372static int sparx5_handle_port_obj_add(struct net_device *dev,
373 struct notifier_block *nb,
374 struct switchdev_notifier_port_obj_info *info)
375{
376 const struct switchdev_obj *obj = info->obj;
377 int err;
378
379 switch (obj->id) {
380 case SWITCHDEV_OBJ_ID_PORT_VLAN:
381 err = sparx5_handle_port_vlan_add(dev, nb,
382 SWITCHDEV_OBJ_PORT_VLAN(obj));
383 break;
384 default:
385 err = -EOPNOTSUPP;
386 break;
387 }
388
389 info->handled = true;
390 return err;
391}
392
393static int sparx5_handle_port_vlan_del(struct net_device *dev,
394 struct notifier_block *nb,
395 u16 vid)
396{
397 struct sparx5_port *port = netdev_priv(dev);
398 int ret;
399
400 /* Master bridge? */
401 if (netif_is_bridge_master(dev)) {
402 struct sparx5 *sparx5 =
403 container_of(nb, struct sparx5,
404 switchdev_blocking_nb);
405
406 sparx5_sync_bridge_dev_addr(dev, sparx5, vid, false);
407 return 0;
408 }
409
410 if (!sparx5_netdevice_check(dev))
411 return -EOPNOTSUPP;
412
413 ret = sparx5_vlan_vid_del(port, vid);
414 if (ret)
415 return ret;
416
417 /* Delete the port MAC address with the matching VLAN information */
418 sparx5_mact_forget(port->sparx5, port->ndev->dev_addr, vid);
419
420 return 0;
421}
422
423static int sparx5_handle_port_obj_del(struct net_device *dev,
424 struct notifier_block *nb,
425 struct switchdev_notifier_port_obj_info *info)
426{
427 const struct switchdev_obj *obj = info->obj;
428 int err;
429
430 switch (obj->id) {
431 case SWITCHDEV_OBJ_ID_PORT_VLAN:
432 err = sparx5_handle_port_vlan_del(dev, nb,
433 SWITCHDEV_OBJ_PORT_VLAN(obj)->vid);
434 break;
435 default:
436 err = -EOPNOTSUPP;
437 break;
438 }
439
440 info->handled = true;
441 return err;
442}
443
444static int sparx5_switchdev_blocking_event(struct notifier_block *nb,
445 unsigned long event,
446 void *ptr)
447{
448 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
449 int err;
450
451 switch (event) {
452 case SWITCHDEV_PORT_OBJ_ADD:
453 err = sparx5_handle_port_obj_add(dev, nb, ptr);
454 return notifier_from_errno(err);
455 case SWITCHDEV_PORT_OBJ_DEL:
456 err = sparx5_handle_port_obj_del(dev, nb, ptr);
457 return notifier_from_errno(err);
458 case SWITCHDEV_PORT_ATTR_SET:
459 err = switchdev_handle_port_attr_set(dev, ptr,
460 sparx5_netdevice_check,
461 sparx5_port_attr_set);
462 return notifier_from_errno(err);
463 }
464
465 return NOTIFY_DONE;
466}
467
468int sparx5_register_notifier_blocks(struct sparx5 *s5)
469{
470 int err;
471
472 s5->netdevice_nb.notifier_call = sparx5_netdevice_event;
473 err = register_netdevice_notifier(&s5->netdevice_nb);
474 if (err)
475 return err;
476
477 s5->switchdev_nb.notifier_call = sparx5_switchdev_event;
478 err = register_switchdev_notifier(&s5->switchdev_nb);
479 if (err)
480 goto err_switchdev_nb;
481
482 s5->switchdev_blocking_nb.notifier_call = sparx5_switchdev_blocking_event;
483 err = register_switchdev_blocking_notifier(&s5->switchdev_blocking_nb);
484 if (err)
485 goto err_switchdev_blocking_nb;
486
487 sparx5_owq = alloc_ordered_workqueue("sparx5_order", 0);
488 if (!sparx5_owq) {
489 err = -ENOMEM;
490 goto err_switchdev_blocking_nb;
491 }
492
493 return 0;
494
495err_switchdev_blocking_nb:
496 unregister_switchdev_notifier(&s5->switchdev_nb);
497err_switchdev_nb:
498 unregister_netdevice_notifier(&s5->netdevice_nb);
499
500 return err;
501}
502
503void sparx5_unregister_notifier_blocks(struct sparx5 *s5)
504{
505 destroy_workqueue(sparx5_owq);
506
507 unregister_switchdev_blocking_notifier(&s5->switchdev_blocking_nb);
508 unregister_switchdev_notifier(&s5->switchdev_nb);
509 unregister_netdevice_notifier(&s5->netdevice_nb);
510}