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9#include <linux/device.h>
10#include <linux/err.h>
11#include <linux/list.h>
12#include <linux/netdevice.h>
13#include <linux/slab.h>
14#include <linux/rtnetlink.h>
15#include <linux/of.h>
16#include <linux/of_net.h>
17#include <net/devlink.h>
18
19#include "dsa_priv.h"
20
21static DEFINE_MUTEX(dsa2_mutex);
22LIST_HEAD(dsa_tree_list);
23
24static const struct devlink_ops dsa_devlink_ops = {
25};
26
27struct dsa_switch *dsa_switch_find(int tree_index, int sw_index)
28{
29 struct dsa_switch_tree *dst;
30 struct dsa_port *dp;
31
32 list_for_each_entry(dst, &dsa_tree_list, list) {
33 if (dst->index != tree_index)
34 continue;
35
36 list_for_each_entry(dp, &dst->ports, list) {
37 if (dp->ds->index != sw_index)
38 continue;
39
40 return dp->ds;
41 }
42 }
43
44 return NULL;
45}
46EXPORT_SYMBOL_GPL(dsa_switch_find);
47
48static struct dsa_switch_tree *dsa_tree_find(int index)
49{
50 struct dsa_switch_tree *dst;
51
52 list_for_each_entry(dst, &dsa_tree_list, list)
53 if (dst->index == index)
54 return dst;
55
56 return NULL;
57}
58
59static struct dsa_switch_tree *dsa_tree_alloc(int index)
60{
61 struct dsa_switch_tree *dst;
62
63 dst = kzalloc(sizeof(*dst), GFP_KERNEL);
64 if (!dst)
65 return NULL;
66
67 dst->index = index;
68
69 INIT_LIST_HEAD(&dst->rtable);
70
71 INIT_LIST_HEAD(&dst->ports);
72
73 INIT_LIST_HEAD(&dst->list);
74 list_add_tail(&dst->list, &dsa_tree_list);
75
76 kref_init(&dst->refcount);
77
78 return dst;
79}
80
81static void dsa_tree_free(struct dsa_switch_tree *dst)
82{
83 list_del(&dst->list);
84 kfree(dst);
85}
86
87static struct dsa_switch_tree *dsa_tree_get(struct dsa_switch_tree *dst)
88{
89 if (dst)
90 kref_get(&dst->refcount);
91
92 return dst;
93}
94
95static struct dsa_switch_tree *dsa_tree_touch(int index)
96{
97 struct dsa_switch_tree *dst;
98
99 dst = dsa_tree_find(index);
100 if (dst)
101 return dsa_tree_get(dst);
102 else
103 return dsa_tree_alloc(index);
104}
105
106static void dsa_tree_release(struct kref *ref)
107{
108 struct dsa_switch_tree *dst;
109
110 dst = container_of(ref, struct dsa_switch_tree, refcount);
111
112 dsa_tree_free(dst);
113}
114
115static void dsa_tree_put(struct dsa_switch_tree *dst)
116{
117 if (dst)
118 kref_put(&dst->refcount, dsa_tree_release);
119}
120
121static bool dsa_port_is_dsa(struct dsa_port *port)
122{
123 return port->type == DSA_PORT_TYPE_DSA;
124}
125
126static bool dsa_port_is_cpu(struct dsa_port *port)
127{
128 return port->type == DSA_PORT_TYPE_CPU;
129}
130
131static bool dsa_port_is_user(struct dsa_port *dp)
132{
133 return dp->type == DSA_PORT_TYPE_USER;
134}
135
136static struct dsa_port *dsa_tree_find_port_by_node(struct dsa_switch_tree *dst,
137 struct device_node *dn)
138{
139 struct dsa_port *dp;
140
141 list_for_each_entry(dp, &dst->ports, list)
142 if (dp->dn == dn)
143 return dp;
144
145 return NULL;
146}
147
148static struct dsa_link *dsa_link_touch(struct dsa_port *dp,
149 struct dsa_port *link_dp)
150{
151 struct dsa_switch *ds = dp->ds;
152 struct dsa_switch_tree *dst;
153 struct dsa_link *dl;
154
155 dst = ds->dst;
156
157 list_for_each_entry(dl, &dst->rtable, list)
158 if (dl->dp == dp && dl->link_dp == link_dp)
159 return dl;
160
161 dl = kzalloc(sizeof(*dl), GFP_KERNEL);
162 if (!dl)
163 return NULL;
164
165 dl->dp = dp;
166 dl->link_dp = link_dp;
167
168 INIT_LIST_HEAD(&dl->list);
169 list_add_tail(&dl->list, &dst->rtable);
170
171 return dl;
172}
173
174static bool dsa_port_setup_routing_table(struct dsa_port *dp)
175{
176 struct dsa_switch *ds = dp->ds;
177 struct dsa_switch_tree *dst = ds->dst;
178 struct device_node *dn = dp->dn;
179 struct of_phandle_iterator it;
180 struct dsa_port *link_dp;
181 struct dsa_link *dl;
182 int err;
183
184 of_for_each_phandle(&it, err, dn, "link", NULL, 0) {
185 link_dp = dsa_tree_find_port_by_node(dst, it.node);
186 if (!link_dp) {
187 of_node_put(it.node);
188 return false;
189 }
190
191 dl = dsa_link_touch(dp, link_dp);
192 if (!dl) {
193 of_node_put(it.node);
194 return false;
195 }
196 }
197
198 return true;
199}
200
201static bool dsa_tree_setup_routing_table(struct dsa_switch_tree *dst)
202{
203 bool complete = true;
204 struct dsa_port *dp;
205
206 list_for_each_entry(dp, &dst->ports, list) {
207 if (dsa_port_is_dsa(dp)) {
208 complete = dsa_port_setup_routing_table(dp);
209 if (!complete)
210 break;
211 }
212 }
213
214 return complete;
215}
216
217static struct dsa_port *dsa_tree_find_first_cpu(struct dsa_switch_tree *dst)
218{
219 struct dsa_port *dp;
220
221 list_for_each_entry(dp, &dst->ports, list)
222 if (dsa_port_is_cpu(dp))
223 return dp;
224
225 return NULL;
226}
227
228static int dsa_tree_setup_default_cpu(struct dsa_switch_tree *dst)
229{
230 struct dsa_port *cpu_dp, *dp;
231
232 cpu_dp = dsa_tree_find_first_cpu(dst);
233 if (!cpu_dp) {
234 pr_err("DSA: tree %d has no CPU port\n", dst->index);
235 return -EINVAL;
236 }
237
238
239 list_for_each_entry(dp, &dst->ports, list)
240 if (dsa_port_is_user(dp) || dsa_port_is_dsa(dp))
241 dp->cpu_dp = cpu_dp;
242
243 return 0;
244}
245
246static void dsa_tree_teardown_default_cpu(struct dsa_switch_tree *dst)
247{
248 struct dsa_port *dp;
249
250 list_for_each_entry(dp, &dst->ports, list)
251 if (dsa_port_is_user(dp) || dsa_port_is_dsa(dp))
252 dp->cpu_dp = NULL;
253}
254
255static int dsa_port_setup(struct dsa_port *dp)
256{
257 struct dsa_switch *ds = dp->ds;
258 struct dsa_switch_tree *dst = ds->dst;
259 const unsigned char *id = (const unsigned char *)&dst->index;
260 const unsigned char len = sizeof(dst->index);
261 struct devlink_port *dlp = &dp->devlink_port;
262 bool dsa_port_link_registered = false;
263 bool devlink_port_registered = false;
264 struct devlink *dl = ds->devlink;
265 bool dsa_port_enabled = false;
266 int err = 0;
267
268 if (dp->setup)
269 return 0;
270
271 switch (dp->type) {
272 case DSA_PORT_TYPE_UNUSED:
273 dsa_port_disable(dp);
274 break;
275 case DSA_PORT_TYPE_CPU:
276 memset(dlp, 0, sizeof(*dlp));
277 devlink_port_attrs_set(dlp, DEVLINK_PORT_FLAVOUR_CPU,
278 dp->index, false, 0, id, len);
279 err = devlink_port_register(dl, dlp, dp->index);
280 if (err)
281 break;
282 devlink_port_registered = true;
283
284 err = dsa_port_link_register_of(dp);
285 if (err)
286 break;
287 dsa_port_link_registered = true;
288
289 err = dsa_port_enable(dp, NULL);
290 if (err)
291 break;
292 dsa_port_enabled = true;
293
294 break;
295 case DSA_PORT_TYPE_DSA:
296 memset(dlp, 0, sizeof(*dlp));
297 devlink_port_attrs_set(dlp, DEVLINK_PORT_FLAVOUR_DSA,
298 dp->index, false, 0, id, len);
299 err = devlink_port_register(dl, dlp, dp->index);
300 if (err)
301 break;
302 devlink_port_registered = true;
303
304 err = dsa_port_link_register_of(dp);
305 if (err)
306 break;
307 dsa_port_link_registered = true;
308
309 err = dsa_port_enable(dp, NULL);
310 if (err)
311 break;
312 dsa_port_enabled = true;
313
314 break;
315 case DSA_PORT_TYPE_USER:
316 memset(dlp, 0, sizeof(*dlp));
317 devlink_port_attrs_set(dlp, DEVLINK_PORT_FLAVOUR_PHYSICAL,
318 dp->index, false, 0, id, len);
319 err = devlink_port_register(dl, dlp, dp->index);
320 if (err)
321 break;
322 devlink_port_registered = true;
323
324 dp->mac = of_get_mac_address(dp->dn);
325 err = dsa_slave_create(dp);
326 if (err)
327 break;
328
329 devlink_port_type_eth_set(dlp, dp->slave);
330 break;
331 }
332
333 if (err && dsa_port_enabled)
334 dsa_port_disable(dp);
335 if (err && dsa_port_link_registered)
336 dsa_port_link_unregister_of(dp);
337 if (err && devlink_port_registered)
338 devlink_port_unregister(dlp);
339 if (err)
340 return err;
341
342 dp->setup = true;
343
344 return 0;
345}
346
347static void dsa_port_teardown(struct dsa_port *dp)
348{
349 struct devlink_port *dlp = &dp->devlink_port;
350
351 if (!dp->setup)
352 return;
353
354 switch (dp->type) {
355 case DSA_PORT_TYPE_UNUSED:
356 break;
357 case DSA_PORT_TYPE_CPU:
358 dsa_port_disable(dp);
359 dsa_tag_driver_put(dp->tag_ops);
360 devlink_port_unregister(dlp);
361 dsa_port_link_unregister_of(dp);
362 break;
363 case DSA_PORT_TYPE_DSA:
364 dsa_port_disable(dp);
365 devlink_port_unregister(dlp);
366 dsa_port_link_unregister_of(dp);
367 break;
368 case DSA_PORT_TYPE_USER:
369 devlink_port_unregister(dlp);
370 if (dp->slave) {
371 dsa_slave_destroy(dp->slave);
372 dp->slave = NULL;
373 }
374 break;
375 }
376
377 dp->setup = false;
378}
379
380static int dsa_switch_setup(struct dsa_switch *ds)
381{
382 struct dsa_devlink_priv *dl_priv;
383 int err;
384
385 if (ds->setup)
386 return 0;
387
388
389
390
391
392
393 ds->phys_mii_mask |= dsa_user_ports(ds);
394
395
396
397
398 ds->devlink = devlink_alloc(&dsa_devlink_ops, sizeof(*dl_priv));
399 if (!ds->devlink)
400 return -ENOMEM;
401 dl_priv = devlink_priv(ds->devlink);
402 dl_priv->ds = ds;
403
404 err = devlink_register(ds->devlink, ds->dev);
405 if (err)
406 goto free_devlink;
407
408 err = dsa_switch_register_notifier(ds);
409 if (err)
410 goto unregister_devlink;
411
412 err = ds->ops->setup(ds);
413 if (err < 0)
414 goto unregister_notifier;
415
416 devlink_params_publish(ds->devlink);
417
418 if (!ds->slave_mii_bus && ds->ops->phy_read) {
419 ds->slave_mii_bus = devm_mdiobus_alloc(ds->dev);
420 if (!ds->slave_mii_bus) {
421 err = -ENOMEM;
422 goto unregister_notifier;
423 }
424
425 dsa_slave_mii_bus_init(ds);
426
427 err = mdiobus_register(ds->slave_mii_bus);
428 if (err < 0)
429 goto unregister_notifier;
430 }
431
432 ds->setup = true;
433
434 return 0;
435
436unregister_notifier:
437 dsa_switch_unregister_notifier(ds);
438unregister_devlink:
439 devlink_unregister(ds->devlink);
440free_devlink:
441 devlink_free(ds->devlink);
442 ds->devlink = NULL;
443
444 return err;
445}
446
447static void dsa_switch_teardown(struct dsa_switch *ds)
448{
449 if (!ds->setup)
450 return;
451
452 if (ds->slave_mii_bus && ds->ops->phy_read)
453 mdiobus_unregister(ds->slave_mii_bus);
454
455 dsa_switch_unregister_notifier(ds);
456
457 if (ds->ops->teardown)
458 ds->ops->teardown(ds);
459
460 if (ds->devlink) {
461 devlink_unregister(ds->devlink);
462 devlink_free(ds->devlink);
463 ds->devlink = NULL;
464 }
465
466 ds->setup = false;
467}
468
469static int dsa_tree_setup_switches(struct dsa_switch_tree *dst)
470{
471 struct dsa_port *dp;
472 int err;
473
474 list_for_each_entry(dp, &dst->ports, list) {
475 err = dsa_switch_setup(dp->ds);
476 if (err)
477 goto teardown;
478 }
479
480 list_for_each_entry(dp, &dst->ports, list) {
481 err = dsa_port_setup(dp);
482 if (err)
483 continue;
484 }
485
486 return 0;
487
488teardown:
489 list_for_each_entry(dp, &dst->ports, list)
490 dsa_port_teardown(dp);
491
492 list_for_each_entry(dp, &dst->ports, list)
493 dsa_switch_teardown(dp->ds);
494
495 return err;
496}
497
498static void dsa_tree_teardown_switches(struct dsa_switch_tree *dst)
499{
500 struct dsa_port *dp;
501
502 list_for_each_entry(dp, &dst->ports, list)
503 dsa_port_teardown(dp);
504
505 list_for_each_entry(dp, &dst->ports, list)
506 dsa_switch_teardown(dp->ds);
507}
508
509static int dsa_tree_setup_master(struct dsa_switch_tree *dst)
510{
511 struct dsa_port *dp;
512 int err;
513
514 list_for_each_entry(dp, &dst->ports, list) {
515 if (dsa_port_is_cpu(dp)) {
516 err = dsa_master_setup(dp->master, dp);
517 if (err)
518 return err;
519 }
520 }
521
522 return 0;
523}
524
525static void dsa_tree_teardown_master(struct dsa_switch_tree *dst)
526{
527 struct dsa_port *dp;
528
529 list_for_each_entry(dp, &dst->ports, list)
530 if (dsa_port_is_cpu(dp))
531 dsa_master_teardown(dp->master);
532}
533
534static int dsa_tree_setup(struct dsa_switch_tree *dst)
535{
536 bool complete;
537 int err;
538
539 if (dst->setup) {
540 pr_err("DSA: tree %d already setup! Disjoint trees?\n",
541 dst->index);
542 return -EEXIST;
543 }
544
545 complete = dsa_tree_setup_routing_table(dst);
546 if (!complete)
547 return 0;
548
549 err = dsa_tree_setup_default_cpu(dst);
550 if (err)
551 return err;
552
553 err = dsa_tree_setup_switches(dst);
554 if (err)
555 goto teardown_default_cpu;
556
557 err = dsa_tree_setup_master(dst);
558 if (err)
559 goto teardown_switches;
560
561 dst->setup = true;
562
563 pr_info("DSA: tree %d setup\n", dst->index);
564
565 return 0;
566
567teardown_switches:
568 dsa_tree_teardown_switches(dst);
569teardown_default_cpu:
570 dsa_tree_teardown_default_cpu(dst);
571
572 return err;
573}
574
575static void dsa_tree_teardown(struct dsa_switch_tree *dst)
576{
577 struct dsa_link *dl, *next;
578
579 if (!dst->setup)
580 return;
581
582 dsa_tree_teardown_master(dst);
583
584 dsa_tree_teardown_switches(dst);
585
586 dsa_tree_teardown_default_cpu(dst);
587
588 list_for_each_entry_safe(dl, next, &dst->rtable, list) {
589 list_del(&dl->list);
590 kfree(dl);
591 }
592
593 pr_info("DSA: tree %d torn down\n", dst->index);
594
595 dst->setup = false;
596}
597
598static struct dsa_port *dsa_port_touch(struct dsa_switch *ds, int index)
599{
600 struct dsa_switch_tree *dst = ds->dst;
601 struct dsa_port *dp;
602
603 list_for_each_entry(dp, &dst->ports, list)
604 if (dp->ds == ds && dp->index == index)
605 return dp;
606
607 dp = kzalloc(sizeof(*dp), GFP_KERNEL);
608 if (!dp)
609 return NULL;
610
611 dp->ds = ds;
612 dp->index = index;
613
614 INIT_LIST_HEAD(&dp->list);
615 list_add_tail(&dp->list, &dst->ports);
616
617 return dp;
618}
619
620static int dsa_port_parse_user(struct dsa_port *dp, const char *name)
621{
622 if (!name)
623 name = "eth%d";
624
625 dp->type = DSA_PORT_TYPE_USER;
626 dp->name = name;
627
628 return 0;
629}
630
631static int dsa_port_parse_dsa(struct dsa_port *dp)
632{
633 dp->type = DSA_PORT_TYPE_DSA;
634
635 return 0;
636}
637
638static enum dsa_tag_protocol dsa_get_tag_protocol(struct dsa_port *dp,
639 struct net_device *master)
640{
641 enum dsa_tag_protocol tag_protocol = DSA_TAG_PROTO_NONE;
642 struct dsa_switch *mds, *ds = dp->ds;
643 unsigned int mdp_upstream;
644 struct dsa_port *mdp;
645
646
647
648
649
650 if (dsa_slave_dev_check(master)) {
651 mdp = dsa_slave_to_port(master);
652 mds = mdp->ds;
653 mdp_upstream = dsa_upstream_port(mds, mdp->index);
654 tag_protocol = mds->ops->get_tag_protocol(mds, mdp_upstream,
655 DSA_TAG_PROTO_NONE);
656 }
657
658
659
660
661 return ds->ops->get_tag_protocol(ds, dp->index, tag_protocol);
662}
663
664static int dsa_port_parse_cpu(struct dsa_port *dp, struct net_device *master)
665{
666 struct dsa_switch *ds = dp->ds;
667 struct dsa_switch_tree *dst = ds->dst;
668 const struct dsa_device_ops *tag_ops;
669 enum dsa_tag_protocol tag_protocol;
670
671 tag_protocol = dsa_get_tag_protocol(dp, master);
672 tag_ops = dsa_tag_driver_get(tag_protocol);
673 if (IS_ERR(tag_ops)) {
674 if (PTR_ERR(tag_ops) == -ENOPROTOOPT)
675 return -EPROBE_DEFER;
676 dev_warn(ds->dev, "No tagger for this switch\n");
677 dp->master = NULL;
678 return PTR_ERR(tag_ops);
679 }
680
681 dp->master = master;
682 dp->type = DSA_PORT_TYPE_CPU;
683 dp->filter = tag_ops->filter;
684 dp->rcv = tag_ops->rcv;
685 dp->tag_ops = tag_ops;
686 dp->dst = dst;
687
688 return 0;
689}
690
691static int dsa_port_parse_of(struct dsa_port *dp, struct device_node *dn)
692{
693 struct device_node *ethernet = of_parse_phandle(dn, "ethernet", 0);
694 const char *name = of_get_property(dn, "label", NULL);
695 bool link = of_property_read_bool(dn, "link");
696
697 dp->dn = dn;
698
699 if (ethernet) {
700 struct net_device *master;
701
702 master = of_find_net_device_by_node(ethernet);
703 if (!master)
704 return -EPROBE_DEFER;
705
706 return dsa_port_parse_cpu(dp, master);
707 }
708
709 if (link)
710 return dsa_port_parse_dsa(dp);
711
712 return dsa_port_parse_user(dp, name);
713}
714
715static int dsa_switch_parse_ports_of(struct dsa_switch *ds,
716 struct device_node *dn)
717{
718 struct device_node *ports, *port;
719 struct dsa_port *dp;
720 int err = 0;
721 u32 reg;
722
723 ports = of_get_child_by_name(dn, "ports");
724 if (!ports) {
725 dev_err(ds->dev, "no ports child node found\n");
726 return -EINVAL;
727 }
728
729 for_each_available_child_of_node(ports, port) {
730 err = of_property_read_u32(port, "reg", ®);
731 if (err)
732 goto out_put_node;
733
734 if (reg >= ds->num_ports) {
735 err = -EINVAL;
736 goto out_put_node;
737 }
738
739 dp = dsa_to_port(ds, reg);
740
741 err = dsa_port_parse_of(dp, port);
742 if (err)
743 goto out_put_node;
744 }
745
746out_put_node:
747 of_node_put(ports);
748 return err;
749}
750
751static int dsa_switch_parse_member_of(struct dsa_switch *ds,
752 struct device_node *dn)
753{
754 u32 m[2] = { 0, 0 };
755 int sz;
756
757
758 sz = of_property_read_variable_u32_array(dn, "dsa,member", m, 2, 2);
759 if (sz < 0 && sz != -EINVAL)
760 return sz;
761
762 ds->index = m[1];
763
764 ds->dst = dsa_tree_touch(m[0]);
765 if (!ds->dst)
766 return -ENOMEM;
767
768 return 0;
769}
770
771static int dsa_switch_touch_ports(struct dsa_switch *ds)
772{
773 struct dsa_port *dp;
774 int port;
775
776 for (port = 0; port < ds->num_ports; port++) {
777 dp = dsa_port_touch(ds, port);
778 if (!dp)
779 return -ENOMEM;
780 }
781
782 return 0;
783}
784
785static int dsa_switch_parse_of(struct dsa_switch *ds, struct device_node *dn)
786{
787 int err;
788
789 err = dsa_switch_parse_member_of(ds, dn);
790 if (err)
791 return err;
792
793 err = dsa_switch_touch_ports(ds);
794 if (err)
795 return err;
796
797 return dsa_switch_parse_ports_of(ds, dn);
798}
799
800static int dsa_port_parse(struct dsa_port *dp, const char *name,
801 struct device *dev)
802{
803 if (!strcmp(name, "cpu")) {
804 struct net_device *master;
805
806 master = dsa_dev_to_net_device(dev);
807 if (!master)
808 return -EPROBE_DEFER;
809
810 dev_put(master);
811
812 return dsa_port_parse_cpu(dp, master);
813 }
814
815 if (!strcmp(name, "dsa"))
816 return dsa_port_parse_dsa(dp);
817
818 return dsa_port_parse_user(dp, name);
819}
820
821static int dsa_switch_parse_ports(struct dsa_switch *ds,
822 struct dsa_chip_data *cd)
823{
824 bool valid_name_found = false;
825 struct dsa_port *dp;
826 struct device *dev;
827 const char *name;
828 unsigned int i;
829 int err;
830
831 for (i = 0; i < DSA_MAX_PORTS; i++) {
832 name = cd->port_names[i];
833 dev = cd->netdev[i];
834 dp = dsa_to_port(ds, i);
835
836 if (!name)
837 continue;
838
839 err = dsa_port_parse(dp, name, dev);
840 if (err)
841 return err;
842
843 valid_name_found = true;
844 }
845
846 if (!valid_name_found && i == DSA_MAX_PORTS)
847 return -EINVAL;
848
849 return 0;
850}
851
852static int dsa_switch_parse(struct dsa_switch *ds, struct dsa_chip_data *cd)
853{
854 int err;
855
856 ds->cd = cd;
857
858
859
860
861 ds->index = 0;
862 ds->dst = dsa_tree_touch(0);
863 if (!ds->dst)
864 return -ENOMEM;
865
866 err = dsa_switch_touch_ports(ds);
867 if (err)
868 return err;
869
870 return dsa_switch_parse_ports(ds, cd);
871}
872
873static void dsa_switch_release_ports(struct dsa_switch *ds)
874{
875 struct dsa_switch_tree *dst = ds->dst;
876 struct dsa_port *dp, *next;
877
878 list_for_each_entry_safe(dp, next, &dst->ports, list) {
879 if (dp->ds != ds)
880 continue;
881 list_del(&dp->list);
882 kfree(dp);
883 }
884}
885
886static int dsa_switch_probe(struct dsa_switch *ds)
887{
888 struct dsa_switch_tree *dst;
889 struct dsa_chip_data *pdata;
890 struct device_node *np;
891 int err;
892
893 if (!ds->dev)
894 return -ENODEV;
895
896 pdata = ds->dev->platform_data;
897 np = ds->dev->of_node;
898
899 if (!ds->num_ports)
900 return -EINVAL;
901
902 if (np) {
903 err = dsa_switch_parse_of(ds, np);
904 if (err)
905 dsa_switch_release_ports(ds);
906 } else if (pdata) {
907 err = dsa_switch_parse(ds, pdata);
908 if (err)
909 dsa_switch_release_ports(ds);
910 } else {
911 err = -ENODEV;
912 }
913
914 if (err)
915 return err;
916
917 dst = ds->dst;
918 dsa_tree_get(dst);
919 err = dsa_tree_setup(dst);
920 if (err) {
921 dsa_switch_release_ports(ds);
922 dsa_tree_put(dst);
923 }
924
925 return err;
926}
927
928int dsa_register_switch(struct dsa_switch *ds)
929{
930 int err;
931
932 mutex_lock(&dsa2_mutex);
933 err = dsa_switch_probe(ds);
934 dsa_tree_put(ds->dst);
935 mutex_unlock(&dsa2_mutex);
936
937 return err;
938}
939EXPORT_SYMBOL_GPL(dsa_register_switch);
940
941static void dsa_switch_remove(struct dsa_switch *ds)
942{
943 struct dsa_switch_tree *dst = ds->dst;
944
945 dsa_tree_teardown(dst);
946 dsa_switch_release_ports(ds);
947 dsa_tree_put(dst);
948}
949
950void dsa_unregister_switch(struct dsa_switch *ds)
951{
952 mutex_lock(&dsa2_mutex);
953 dsa_switch_remove(ds);
954 mutex_unlock(&dsa2_mutex);
955}
956EXPORT_SYMBOL_GPL(dsa_unregister_switch);
957
