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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_attr_bridge_flags(struct sparx5_port *port,
33 struct switchdev_brport_flags flags)
34{
35 int pgid;
36
37 if (flags.mask & BR_MCAST_FLOOD)
38 for (pgid = PGID_MC_FLOOD; pgid <= PGID_IPV6_MC_CTRL; pgid++)
39 sparx5_pgid_update_mask(port, pgid, !!(flags.val & BR_MCAST_FLOOD));
40 if (flags.mask & BR_FLOOD)
41 sparx5_pgid_update_mask(port, PGID_UC_FLOOD, !!(flags.val & BR_FLOOD));
42 if (flags.mask & BR_BCAST_FLOOD)
43 sparx5_pgid_update_mask(port, PGID_BCAST, !!(flags.val & BR_BCAST_FLOOD));
44}
45
46static void sparx5_attr_stp_state_set(struct sparx5_port *port,
47 u8 state)
48{
49 struct sparx5 *sparx5 = port->sparx5;
50
51 if (!test_bit(port->portno, sparx5->bridge_mask)) {
52 netdev_err(port->ndev,
53 "Controlling non-bridged port %d?\n", port->portno);
54 return;
55 }
56
57 switch (state) {
58 case BR_STATE_FORWARDING:
59 set_bit(port->portno, sparx5->bridge_fwd_mask);
60 fallthrough;
61 case BR_STATE_LEARNING:
62 set_bit(port->portno, sparx5->bridge_lrn_mask);
63 break;
64
65 default:
66
67 clear_bit(port->portno, sparx5->bridge_fwd_mask);
68 clear_bit(port->portno, sparx5->bridge_lrn_mask);
69 break;
70 }
71
72
73 sparx5_update_fwd(sparx5);
74}
75
76static void sparx5_port_attr_ageing_set(struct sparx5_port *port,
77 unsigned long ageing_clock_t)
78{
79 unsigned long ageing_jiffies = clock_t_to_jiffies(ageing_clock_t);
80 u32 ageing_time = jiffies_to_msecs(ageing_jiffies);
81
82 sparx5_set_ageing(port->sparx5, ageing_time);
83}
84
85static int sparx5_port_attr_set(struct net_device *dev, const void *ctx,
86 const struct switchdev_attr *attr,
87 struct netlink_ext_ack *extack)
88{
89 struct sparx5_port *port = netdev_priv(dev);
90
91 switch (attr->id) {
92 case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
93 return sparx5_port_attr_pre_bridge_flags(port,
94 attr->u.brport_flags);
95 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
96 sparx5_port_attr_bridge_flags(port, attr->u.brport_flags);
97 break;
98 case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
99 sparx5_attr_stp_state_set(port, attr->u.stp_state);
100 break;
101 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
102 sparx5_port_attr_ageing_set(port, attr->u.ageing_time);
103 break;
104 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
105
106
107
108 if (port->pvid == 0)
109 port->pvid = 1;
110 port->vlan_aware = attr->u.vlan_filtering;
111 sparx5_vlan_port_apply(port->sparx5, port);
112 break;
113 default:
114 return -EOPNOTSUPP;
115 }
116
117 return 0;
118}
119
120static int sparx5_port_bridge_join(struct sparx5_port *port,
121 struct net_device *bridge,
122 struct netlink_ext_ack *extack)
123{
124 struct sparx5 *sparx5 = port->sparx5;
125 struct net_device *ndev = port->ndev;
126 int err;
127
128 if (bitmap_empty(sparx5->bridge_mask, SPX5_PORTS))
129
130 sparx5->hw_bridge_dev = bridge;
131 else
132 if (sparx5->hw_bridge_dev != bridge)
133
134
135
136 return -ENODEV;
137
138 set_bit(port->portno, sparx5->bridge_mask);
139
140 err = switchdev_bridge_port_offload(ndev, ndev, NULL, NULL, NULL,
141 false, extack);
142 if (err)
143 goto err_switchdev_offload;
144
145
146 sparx5_mact_forget(sparx5, ndev->dev_addr, 0);
147
148
149
150
151 __dev_mc_unsync(ndev, sparx5_mc_unsync);
152
153 return 0;
154
155err_switchdev_offload:
156 clear_bit(port->portno, sparx5->bridge_mask);
157 return err;
158}
159
160static void sparx5_port_bridge_leave(struct sparx5_port *port,
161 struct net_device *bridge)
162{
163 struct sparx5 *sparx5 = port->sparx5;
164
165 switchdev_bridge_port_unoffload(port->ndev, NULL, NULL, NULL);
166
167 clear_bit(port->portno, sparx5->bridge_mask);
168 if (bitmap_empty(sparx5->bridge_mask, SPX5_PORTS))
169 sparx5->hw_bridge_dev = NULL;
170
171
172 port->vlan_aware = 0;
173 port->pvid = NULL_VID;
174 port->vid = NULL_VID;
175
176
177 sparx5_mact_learn(sparx5, PGID_CPU, port->ndev->dev_addr, 0);
178
179
180 __dev_mc_sync(port->ndev, sparx5_mc_sync, sparx5_mc_unsync);
181}
182
183static int sparx5_port_changeupper(struct net_device *dev,
184 struct netdev_notifier_changeupper_info *info)
185{
186 struct sparx5_port *port = netdev_priv(dev);
187 struct netlink_ext_ack *extack;
188 int err = 0;
189
190 extack = netdev_notifier_info_to_extack(&info->info);
191
192 if (netif_is_bridge_master(info->upper_dev)) {
193 if (info->linking)
194 err = sparx5_port_bridge_join(port, info->upper_dev,
195 extack);
196 else
197 sparx5_port_bridge_leave(port, info->upper_dev);
198
199 sparx5_vlan_port_apply(port->sparx5, port);
200 }
201
202 return err;
203}
204
205static int sparx5_port_add_addr(struct net_device *dev, bool up)
206{
207 struct sparx5_port *port = netdev_priv(dev);
208 struct sparx5 *sparx5 = port->sparx5;
209 u16 vid = port->pvid;
210
211 if (up)
212 sparx5_mact_learn(sparx5, PGID_CPU, port->ndev->dev_addr, vid);
213 else
214 sparx5_mact_forget(sparx5, port->ndev->dev_addr, vid);
215
216 return 0;
217}
218
219static int sparx5_netdevice_port_event(struct net_device *dev,
220 struct notifier_block *nb,
221 unsigned long event, void *ptr)
222{
223 int err = 0;
224
225 if (!sparx5_netdevice_check(dev))
226 return 0;
227
228 switch (event) {
229 case NETDEV_CHANGEUPPER:
230 err = sparx5_port_changeupper(dev, ptr);
231 break;
232 case NETDEV_PRE_UP:
233 err = sparx5_port_add_addr(dev, true);
234 break;
235 case NETDEV_DOWN:
236 err = sparx5_port_add_addr(dev, false);
237 break;
238 }
239
240 return err;
241}
242
243static int sparx5_netdevice_event(struct notifier_block *nb,
244 unsigned long event, void *ptr)
245{
246 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
247 int ret = 0;
248
249 ret = sparx5_netdevice_port_event(dev, nb, event, ptr);
250
251 return notifier_from_errno(ret);
252}
253
254static void sparx5_switchdev_bridge_fdb_event_work(struct work_struct *work)
255{
256 struct sparx5_switchdev_event_work *switchdev_work =
257 container_of(work, struct sparx5_switchdev_event_work, work);
258 struct net_device *dev = switchdev_work->dev;
259 struct switchdev_notifier_fdb_info *fdb_info;
260 struct sparx5_port *port;
261 struct sparx5 *sparx5;
262 bool host_addr;
263 u16 vid;
264
265 rtnl_lock();
266 if (!sparx5_netdevice_check(dev)) {
267 host_addr = true;
268 sparx5 = switchdev_work->sparx5;
269 } else {
270 host_addr = false;
271 sparx5 = switchdev_work->sparx5;
272 port = netdev_priv(dev);
273 }
274
275 fdb_info = &switchdev_work->fdb_info;
276
277
278
279
280 if (fdb_info->vid == 0)
281 vid = 1;
282 else
283 vid = fdb_info->vid;
284
285 switch (switchdev_work->event) {
286 case SWITCHDEV_FDB_ADD_TO_DEVICE:
287 if (host_addr)
288 sparx5_add_mact_entry(sparx5, dev, PGID_CPU,
289 fdb_info->addr, vid);
290 else
291 sparx5_add_mact_entry(sparx5, port->ndev, port->portno,
292 fdb_info->addr, vid);
293 break;
294 case SWITCHDEV_FDB_DEL_TO_DEVICE:
295 sparx5_del_mact_entry(sparx5, fdb_info->addr, vid);
296 break;
297 }
298
299 rtnl_unlock();
300 kfree(switchdev_work->fdb_info.addr);
301 kfree(switchdev_work);
302 dev_put(dev);
303}
304
305static void sparx5_schedule_work(struct work_struct *work)
306{
307 queue_work(sparx5_owq, work);
308}
309
310static int sparx5_switchdev_event(struct notifier_block *nb,
311 unsigned long event, void *ptr)
312{
313 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
314 struct sparx5_switchdev_event_work *switchdev_work;
315 struct switchdev_notifier_fdb_info *fdb_info;
316 struct switchdev_notifier_info *info = ptr;
317 struct sparx5 *spx5;
318 int err;
319
320 spx5 = container_of(nb, struct sparx5, switchdev_nb);
321
322 switch (event) {
323 case SWITCHDEV_PORT_ATTR_SET:
324 err = switchdev_handle_port_attr_set(dev, ptr,
325 sparx5_netdevice_check,
326 sparx5_port_attr_set);
327 return notifier_from_errno(err);
328 case SWITCHDEV_FDB_ADD_TO_DEVICE:
329 fallthrough;
330 case SWITCHDEV_FDB_DEL_TO_DEVICE:
331 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
332 if (!switchdev_work)
333 return NOTIFY_BAD;
334
335 switchdev_work->dev = dev;
336 switchdev_work->event = event;
337 switchdev_work->sparx5 = spx5;
338
339 fdb_info = container_of(info,
340 struct switchdev_notifier_fdb_info,
341 info);
342 INIT_WORK(&switchdev_work->work,
343 sparx5_switchdev_bridge_fdb_event_work);
344 memcpy(&switchdev_work->fdb_info, ptr,
345 sizeof(switchdev_work->fdb_info));
346 switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC);
347 if (!switchdev_work->fdb_info.addr)
348 goto err_addr_alloc;
349
350 ether_addr_copy((u8 *)switchdev_work->fdb_info.addr,
351 fdb_info->addr);
352 dev_hold(dev);
353
354 sparx5_schedule_work(&switchdev_work->work);
355 break;
356 }
357
358 return NOTIFY_DONE;
359err_addr_alloc:
360 kfree(switchdev_work);
361 return NOTIFY_BAD;
362}
363
364static int sparx5_handle_port_vlan_add(struct net_device *dev,
365 struct notifier_block *nb,
366 const struct switchdev_obj_port_vlan *v)
367{
368 struct sparx5_port *port = netdev_priv(dev);
369
370 if (netif_is_bridge_master(dev)) {
371 struct sparx5 *sparx5 =
372 container_of(nb, struct sparx5,
373 switchdev_blocking_nb);
374
375
376 sparx5_mact_learn(sparx5, PGID_BCAST, dev->broadcast,
377 v->vid);
378 return 0;
379 }
380
381 if (!sparx5_netdevice_check(dev))
382 return -EOPNOTSUPP;
383
384 return sparx5_vlan_vid_add(port, v->vid,
385 v->flags & BRIDGE_VLAN_INFO_PVID,
386 v->flags & BRIDGE_VLAN_INFO_UNTAGGED);
387}
388
389static int sparx5_handle_port_mdb_add(struct net_device *dev,
390 struct notifier_block *nb,
391 const struct switchdev_obj_port_mdb *v)
392{
393 struct sparx5_port *port = netdev_priv(dev);
394 struct sparx5 *spx5 = port->sparx5;
395 u16 pgid_idx, vid;
396 u32 mact_entry;
397 int res, err;
398
399 if (!sparx5_netdevice_check(dev))
400 return -EOPNOTSUPP;
401
402 if (netif_is_bridge_master(v->obj.orig_dev)) {
403 sparx5_mact_learn(spx5, PGID_CPU, v->addr, v->vid);
404 return 0;
405 }
406
407
408
409
410 if (!br_vlan_enabled(spx5->hw_bridge_dev))
411 vid = 1;
412 else
413 vid = v->vid;
414
415 res = sparx5_mact_find(spx5, v->addr, vid, &mact_entry);
416
417 if (res == 0) {
418 pgid_idx = LRN_MAC_ACCESS_CFG_2_MAC_ENTRY_ADDR_GET(mact_entry);
419
420
421 pgid_idx += SPX5_PORTS;
422 sparx5_pgid_update_mask(port, pgid_idx, true);
423 } else {
424 err = sparx5_pgid_alloc_mcast(spx5, &pgid_idx);
425 if (err) {
426 netdev_warn(dev, "multicast pgid table full\n");
427 return err;
428 }
429 sparx5_pgid_update_mask(port, pgid_idx, true);
430 err = sparx5_mact_learn(spx5, pgid_idx, v->addr, vid);
431 if (err) {
432 netdev_warn(dev, "could not learn mac address %pM\n", v->addr);
433 sparx5_pgid_update_mask(port, pgid_idx, false);
434 return err;
435 }
436 }
437
438 return 0;
439}
440
441static int sparx5_mdb_del_entry(struct net_device *dev,
442 struct sparx5 *spx5,
443 const unsigned char mac[ETH_ALEN],
444 const u16 vid,
445 u16 pgid_idx)
446{
447 int err;
448
449 err = sparx5_mact_forget(spx5, mac, vid);
450 if (err) {
451 netdev_warn(dev, "could not forget mac address %pM", mac);
452 return err;
453 }
454 err = sparx5_pgid_free(spx5, pgid_idx);
455 if (err) {
456 netdev_err(dev, "attempted to free already freed pgid\n");
457 return err;
458 }
459 return 0;
460}
461
462static int sparx5_handle_port_mdb_del(struct net_device *dev,
463 struct notifier_block *nb,
464 const struct switchdev_obj_port_mdb *v)
465{
466 struct sparx5_port *port = netdev_priv(dev);
467 struct sparx5 *spx5 = port->sparx5;
468 u16 pgid_idx, vid;
469 u32 mact_entry, res, pgid_entry[3];
470 int err;
471
472 if (!sparx5_netdevice_check(dev))
473 return -EOPNOTSUPP;
474
475 if (netif_is_bridge_master(v->obj.orig_dev)) {
476 sparx5_mact_forget(spx5, v->addr, v->vid);
477 return 0;
478 }
479
480 if (!br_vlan_enabled(spx5->hw_bridge_dev))
481 vid = 1;
482 else
483 vid = v->vid;
484
485 res = sparx5_mact_find(spx5, v->addr, vid, &mact_entry);
486
487 if (res == 0) {
488 pgid_idx = LRN_MAC_ACCESS_CFG_2_MAC_ENTRY_ADDR_GET(mact_entry);
489
490
491 pgid_idx += SPX5_PORTS;
492 sparx5_pgid_update_mask(port, pgid_idx, false);
493
494 sparx5_pgid_read_mask(spx5, pgid_idx, pgid_entry);
495 if (bitmap_empty((unsigned long *)pgid_entry, SPX5_PORTS)) {
496
497 err = sparx5_mdb_del_entry(dev, spx5, v->addr, vid, pgid_idx);
498 if (err)
499 return err;
500 }
501 }
502
503 return 0;
504}
505
506static int sparx5_handle_port_obj_add(struct net_device *dev,
507 struct notifier_block *nb,
508 struct switchdev_notifier_port_obj_info *info)
509{
510 const struct switchdev_obj *obj = info->obj;
511 int err;
512
513 switch (obj->id) {
514 case SWITCHDEV_OBJ_ID_PORT_VLAN:
515 err = sparx5_handle_port_vlan_add(dev, nb,
516 SWITCHDEV_OBJ_PORT_VLAN(obj));
517 break;
518 case SWITCHDEV_OBJ_ID_PORT_MDB:
519 case SWITCHDEV_OBJ_ID_HOST_MDB:
520 err = sparx5_handle_port_mdb_add(dev, nb,
521 SWITCHDEV_OBJ_PORT_MDB(obj));
522 break;
523 default:
524 err = -EOPNOTSUPP;
525 break;
526 }
527
528 info->handled = true;
529 return err;
530}
531
532static int sparx5_handle_port_vlan_del(struct net_device *dev,
533 struct notifier_block *nb,
534 u16 vid)
535{
536 struct sparx5_port *port = netdev_priv(dev);
537 int ret;
538
539
540 if (netif_is_bridge_master(dev)) {
541 struct sparx5 *sparx5 =
542 container_of(nb, struct sparx5,
543 switchdev_blocking_nb);
544
545 sparx5_mact_forget(sparx5, dev->broadcast, vid);
546 return 0;
547 }
548
549 if (!sparx5_netdevice_check(dev))
550 return -EOPNOTSUPP;
551
552 ret = sparx5_vlan_vid_del(port, vid);
553 if (ret)
554 return ret;
555
556 return 0;
557}
558
559static int sparx5_handle_port_obj_del(struct net_device *dev,
560 struct notifier_block *nb,
561 struct switchdev_notifier_port_obj_info *info)
562{
563 const struct switchdev_obj *obj = info->obj;
564 int err;
565
566 switch (obj->id) {
567 case SWITCHDEV_OBJ_ID_PORT_VLAN:
568 err = sparx5_handle_port_vlan_del(dev, nb,
569 SWITCHDEV_OBJ_PORT_VLAN(obj)->vid);
570 break;
571 case SWITCHDEV_OBJ_ID_PORT_MDB:
572 case SWITCHDEV_OBJ_ID_HOST_MDB:
573 err = sparx5_handle_port_mdb_del(dev, nb,
574 SWITCHDEV_OBJ_PORT_MDB(obj));
575 break;
576 default:
577 err = -EOPNOTSUPP;
578 break;
579 }
580
581 info->handled = true;
582 return err;
583}
584
585static int sparx5_switchdev_blocking_event(struct notifier_block *nb,
586 unsigned long event,
587 void *ptr)
588{
589 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
590 int err;
591
592 switch (event) {
593 case SWITCHDEV_PORT_OBJ_ADD:
594 err = sparx5_handle_port_obj_add(dev, nb, ptr);
595 return notifier_from_errno(err);
596 case SWITCHDEV_PORT_OBJ_DEL:
597 err = sparx5_handle_port_obj_del(dev, nb, ptr);
598 return notifier_from_errno(err);
599 case SWITCHDEV_PORT_ATTR_SET:
600 err = switchdev_handle_port_attr_set(dev, ptr,
601 sparx5_netdevice_check,
602 sparx5_port_attr_set);
603 return notifier_from_errno(err);
604 }
605
606 return NOTIFY_DONE;
607}
608
609int sparx5_register_notifier_blocks(struct sparx5 *s5)
610{
611 int err;
612
613 s5->netdevice_nb.notifier_call = sparx5_netdevice_event;
614 err = register_netdevice_notifier(&s5->netdevice_nb);
615 if (err)
616 return err;
617
618 s5->switchdev_nb.notifier_call = sparx5_switchdev_event;
619 err = register_switchdev_notifier(&s5->switchdev_nb);
620 if (err)
621 goto err_switchdev_nb;
622
623 s5->switchdev_blocking_nb.notifier_call = sparx5_switchdev_blocking_event;
624 err = register_switchdev_blocking_notifier(&s5->switchdev_blocking_nb);
625 if (err)
626 goto err_switchdev_blocking_nb;
627
628 sparx5_owq = alloc_ordered_workqueue("sparx5_order", 0);
629 if (!sparx5_owq) {
630 err = -ENOMEM;
631 goto err_switchdev_blocking_nb;
632 }
633
634 return 0;
635
636err_switchdev_blocking_nb:
637 unregister_switchdev_notifier(&s5->switchdev_nb);
638err_switchdev_nb:
639 unregister_netdevice_notifier(&s5->netdevice_nb);
640
641 return err;
642}
643
644void sparx5_unregister_notifier_blocks(struct sparx5 *s5)
645{
646 destroy_workqueue(sparx5_owq);
647
648 unregister_switchdev_blocking_notifier(&s5->switchdev_blocking_nb);
649 unregister_switchdev_notifier(&s5->switchdev_nb);
650 unregister_netdevice_notifier(&s5->netdevice_nb);
651}
652
