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83c0afae AL |
1 | /* |
2 | * net/dsa/dsa2.c - Hardware switch handling, binding version 2 | |
3 | * Copyright (c) 2008-2009 Marvell Semiconductor | |
4 | * Copyright (c) 2013 Florian Fainelli <florian@openwrt.org> | |
5 | * Copyright (c) 2016 Andrew Lunn <andrew@lunn.ch> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | */ | |
12 | ||
13 | #include <linux/device.h> | |
14 | #include <linux/err.h> | |
15 | #include <linux/list.h> | |
16 | #include <linux/slab.h> | |
17 | #include <linux/rtnetlink.h> | |
18 | #include <net/dsa.h> | |
19 | #include <linux/of.h> | |
20 | #include <linux/of_net.h> | |
21 | #include "dsa_priv.h" | |
22 | ||
23 | static LIST_HEAD(dsa_switch_trees); | |
24 | static DEFINE_MUTEX(dsa2_mutex); | |
25 | ||
26 | static struct dsa_switch_tree *dsa_get_dst(u32 tree) | |
27 | { | |
28 | struct dsa_switch_tree *dst; | |
29 | ||
30 | list_for_each_entry(dst, &dsa_switch_trees, list) | |
7a99cd6e NY |
31 | if (dst->tree == tree) { |
32 | kref_get(&dst->refcount); | |
83c0afae | 33 | return dst; |
7a99cd6e | 34 | } |
83c0afae AL |
35 | return NULL; |
36 | } | |
37 | ||
38 | static void dsa_free_dst(struct kref *ref) | |
39 | { | |
40 | struct dsa_switch_tree *dst = container_of(ref, struct dsa_switch_tree, | |
41 | refcount); | |
42 | ||
43 | list_del(&dst->list); | |
44 | kfree(dst); | |
45 | } | |
46 | ||
47 | static void dsa_put_dst(struct dsa_switch_tree *dst) | |
48 | { | |
49 | kref_put(&dst->refcount, dsa_free_dst); | |
50 | } | |
51 | ||
52 | static struct dsa_switch_tree *dsa_add_dst(u32 tree) | |
53 | { | |
54 | struct dsa_switch_tree *dst; | |
55 | ||
56 | dst = kzalloc(sizeof(*dst), GFP_KERNEL); | |
57 | if (!dst) | |
58 | return NULL; | |
59 | dst->tree = tree; | |
60 | dst->cpu_switch = -1; | |
61 | INIT_LIST_HEAD(&dst->list); | |
62 | list_add_tail(&dsa_switch_trees, &dst->list); | |
63 | kref_init(&dst->refcount); | |
64 | ||
65 | return dst; | |
66 | } | |
67 | ||
68 | static void dsa_dst_add_ds(struct dsa_switch_tree *dst, | |
69 | struct dsa_switch *ds, u32 index) | |
70 | { | |
71 | kref_get(&dst->refcount); | |
72 | dst->ds[index] = ds; | |
73 | } | |
74 | ||
75 | static void dsa_dst_del_ds(struct dsa_switch_tree *dst, | |
76 | struct dsa_switch *ds, u32 index) | |
77 | { | |
78 | dst->ds[index] = NULL; | |
79 | kref_put(&dst->refcount, dsa_free_dst); | |
80 | } | |
81 | ||
82 | static bool dsa_port_is_dsa(struct device_node *port) | |
83 | { | |
84 | const char *name; | |
85 | ||
86 | name = of_get_property(port, "label", NULL); | |
87 | if (!name) | |
88 | return false; | |
89 | ||
90 | if (!strcmp(name, "dsa")) | |
91 | return true; | |
92 | ||
93 | return false; | |
94 | } | |
95 | ||
96 | static bool dsa_port_is_cpu(struct device_node *port) | |
97 | { | |
98 | const char *name; | |
99 | ||
100 | name = of_get_property(port, "label", NULL); | |
101 | if (!name) | |
102 | return false; | |
103 | ||
104 | if (!strcmp(name, "cpu")) | |
105 | return true; | |
106 | ||
107 | return false; | |
108 | } | |
109 | ||
110 | static bool dsa_ds_find_port(struct dsa_switch *ds, | |
111 | struct device_node *port) | |
112 | { | |
113 | u32 index; | |
114 | ||
115 | for (index = 0; index < DSA_MAX_PORTS; index++) | |
116 | if (ds->ports[index].dn == port) | |
117 | return true; | |
118 | return false; | |
119 | } | |
120 | ||
121 | static struct dsa_switch *dsa_dst_find_port(struct dsa_switch_tree *dst, | |
122 | struct device_node *port) | |
123 | { | |
124 | struct dsa_switch *ds; | |
125 | u32 index; | |
126 | ||
127 | for (index = 0; index < DSA_MAX_SWITCHES; index++) { | |
128 | ds = dst->ds[index]; | |
129 | if (!ds) | |
130 | continue; | |
131 | ||
132 | if (dsa_ds_find_port(ds, port)) | |
133 | return ds; | |
134 | } | |
135 | ||
136 | return NULL; | |
137 | } | |
138 | ||
139 | static int dsa_port_complete(struct dsa_switch_tree *dst, | |
140 | struct dsa_switch *src_ds, | |
141 | struct device_node *port, | |
142 | u32 src_port) | |
143 | { | |
144 | struct device_node *link; | |
145 | int index; | |
146 | struct dsa_switch *dst_ds; | |
147 | ||
148 | for (index = 0;; index++) { | |
149 | link = of_parse_phandle(port, "link", index); | |
150 | if (!link) | |
151 | break; | |
152 | ||
153 | dst_ds = dsa_dst_find_port(dst, link); | |
154 | of_node_put(link); | |
155 | ||
156 | if (!dst_ds) | |
157 | return 1; | |
158 | ||
159 | src_ds->rtable[dst_ds->index] = src_port; | |
160 | } | |
161 | ||
162 | return 0; | |
163 | } | |
164 | ||
165 | /* A switch is complete if all the DSA ports phandles point to ports | |
166 | * known in the tree. A return value of 1 means the tree is not | |
167 | * complete. This is not an error condition. A value of 0 is | |
168 | * success. | |
169 | */ | |
170 | static int dsa_ds_complete(struct dsa_switch_tree *dst, struct dsa_switch *ds) | |
171 | { | |
172 | struct device_node *port; | |
173 | u32 index; | |
174 | int err; | |
175 | ||
176 | for (index = 0; index < DSA_MAX_PORTS; index++) { | |
177 | port = ds->ports[index].dn; | |
178 | if (!port) | |
179 | continue; | |
180 | ||
181 | if (!dsa_port_is_dsa(port)) | |
182 | continue; | |
183 | ||
184 | err = dsa_port_complete(dst, ds, port, index); | |
185 | if (err != 0) | |
186 | return err; | |
187 | ||
188 | ds->dsa_port_mask |= BIT(index); | |
189 | } | |
190 | ||
191 | return 0; | |
192 | } | |
193 | ||
194 | /* A tree is complete if all the DSA ports phandles point to ports | |
195 | * known in the tree. A return value of 1 means the tree is not | |
196 | * complete. This is not an error condition. A value of 0 is | |
197 | * success. | |
198 | */ | |
199 | static int dsa_dst_complete(struct dsa_switch_tree *dst) | |
200 | { | |
201 | struct dsa_switch *ds; | |
202 | u32 index; | |
203 | int err; | |
204 | ||
205 | for (index = 0; index < DSA_MAX_SWITCHES; index++) { | |
206 | ds = dst->ds[index]; | |
207 | if (!ds) | |
208 | continue; | |
209 | ||
210 | err = dsa_ds_complete(dst, ds); | |
211 | if (err != 0) | |
212 | return err; | |
213 | } | |
214 | ||
215 | return 0; | |
216 | } | |
217 | ||
218 | static int dsa_dsa_port_apply(struct device_node *port, u32 index, | |
219 | struct dsa_switch *ds) | |
220 | { | |
221 | int err; | |
222 | ||
223 | err = dsa_cpu_dsa_setup(ds, ds->dev, port, index); | |
224 | if (err) { | |
225 | dev_warn(ds->dev, "Failed to setup dsa port %d: %d\n", | |
226 | index, err); | |
227 | return err; | |
228 | } | |
229 | ||
230 | return 0; | |
231 | } | |
232 | ||
233 | static void dsa_dsa_port_unapply(struct device_node *port, u32 index, | |
234 | struct dsa_switch *ds) | |
235 | { | |
236 | dsa_cpu_dsa_destroy(port); | |
237 | } | |
238 | ||
239 | static int dsa_cpu_port_apply(struct device_node *port, u32 index, | |
240 | struct dsa_switch *ds) | |
241 | { | |
242 | int err; | |
243 | ||
244 | err = dsa_cpu_dsa_setup(ds, ds->dev, port, index); | |
245 | if (err) { | |
246 | dev_warn(ds->dev, "Failed to setup cpu port %d: %d\n", | |
247 | index, err); | |
248 | return err; | |
249 | } | |
250 | ||
251 | ds->cpu_port_mask |= BIT(index); | |
252 | ||
253 | return 0; | |
254 | } | |
255 | ||
256 | static void dsa_cpu_port_unapply(struct device_node *port, u32 index, | |
257 | struct dsa_switch *ds) | |
258 | { | |
259 | dsa_cpu_dsa_destroy(port); | |
260 | ds->cpu_port_mask &= ~BIT(index); | |
261 | ||
262 | } | |
263 | ||
264 | static int dsa_user_port_apply(struct device_node *port, u32 index, | |
265 | struct dsa_switch *ds) | |
266 | { | |
267 | const char *name; | |
268 | int err; | |
269 | ||
270 | name = of_get_property(port, "label", NULL); | |
271 | ||
272 | err = dsa_slave_create(ds, ds->dev, index, name); | |
273 | if (err) { | |
274 | dev_warn(ds->dev, "Failed to create slave %d: %d\n", | |
275 | index, err); | |
276 | return err; | |
277 | } | |
278 | ||
279 | return 0; | |
280 | } | |
281 | ||
282 | static void dsa_user_port_unapply(struct device_node *port, u32 index, | |
283 | struct dsa_switch *ds) | |
284 | { | |
285 | if (ds->ports[index].netdev) { | |
286 | dsa_slave_destroy(ds->ports[index].netdev); | |
287 | ds->ports[index].netdev = NULL; | |
6e830d8f | 288 | ds->enabled_port_mask &= ~(1 << index); |
83c0afae AL |
289 | } |
290 | } | |
291 | ||
292 | static int dsa_ds_apply(struct dsa_switch_tree *dst, struct dsa_switch *ds) | |
293 | { | |
294 | struct device_node *port; | |
295 | u32 index; | |
296 | int err; | |
297 | ||
6e830d8f | 298 | /* Initialize ds->phys_mii_mask before registering the slave MDIO bus |
9d490b4e | 299 | * driver and before ops->setup() has run, since the switch drivers and |
6e830d8f FF |
300 | * the slave MDIO bus driver rely on these values for probing PHY |
301 | * devices or not | |
302 | */ | |
303 | ds->phys_mii_mask = ds->enabled_port_mask; | |
304 | ||
9d490b4e | 305 | err = ds->ops->setup(ds); |
83c0afae AL |
306 | if (err < 0) |
307 | return err; | |
308 | ||
092183df JC |
309 | if (ds->ops->set_addr) { |
310 | err = ds->ops->set_addr(ds, dst->master_netdev->dev_addr); | |
311 | if (err < 0) | |
312 | return err; | |
313 | } | |
83c0afae | 314 | |
9d490b4e | 315 | if (!ds->slave_mii_bus && ds->ops->phy_read) { |
1eb59443 FF |
316 | ds->slave_mii_bus = devm_mdiobus_alloc(ds->dev); |
317 | if (!ds->slave_mii_bus) | |
318 | return -ENOMEM; | |
319 | ||
320 | dsa_slave_mii_bus_init(ds); | |
321 | ||
322 | err = mdiobus_register(ds->slave_mii_bus); | |
323 | if (err < 0) | |
324 | return err; | |
325 | } | |
326 | ||
83c0afae AL |
327 | for (index = 0; index < DSA_MAX_PORTS; index++) { |
328 | port = ds->ports[index].dn; | |
329 | if (!port) | |
330 | continue; | |
331 | ||
332 | if (dsa_port_is_dsa(port)) { | |
333 | err = dsa_dsa_port_apply(port, index, ds); | |
334 | if (err) | |
335 | return err; | |
336 | continue; | |
337 | } | |
338 | ||
339 | if (dsa_port_is_cpu(port)) { | |
340 | err = dsa_cpu_port_apply(port, index, ds); | |
341 | if (err) | |
342 | return err; | |
343 | continue; | |
344 | } | |
345 | ||
346 | err = dsa_user_port_apply(port, index, ds); | |
347 | if (err) | |
348 | continue; | |
349 | } | |
350 | ||
351 | return 0; | |
352 | } | |
353 | ||
354 | static void dsa_ds_unapply(struct dsa_switch_tree *dst, struct dsa_switch *ds) | |
355 | { | |
356 | struct device_node *port; | |
357 | u32 index; | |
358 | ||
359 | for (index = 0; index < DSA_MAX_PORTS; index++) { | |
360 | port = ds->ports[index].dn; | |
361 | if (!port) | |
362 | continue; | |
363 | ||
364 | if (dsa_port_is_dsa(port)) { | |
365 | dsa_dsa_port_unapply(port, index, ds); | |
366 | continue; | |
367 | } | |
368 | ||
369 | if (dsa_port_is_cpu(port)) { | |
370 | dsa_cpu_port_unapply(port, index, ds); | |
371 | continue; | |
372 | } | |
373 | ||
374 | dsa_user_port_unapply(port, index, ds); | |
375 | } | |
1eb59443 | 376 | |
9d490b4e | 377 | if (ds->slave_mii_bus && ds->ops->phy_read) |
1eb59443 | 378 | mdiobus_unregister(ds->slave_mii_bus); |
83c0afae AL |
379 | } |
380 | ||
381 | static int dsa_dst_apply(struct dsa_switch_tree *dst) | |
382 | { | |
383 | struct dsa_switch *ds; | |
384 | u32 index; | |
385 | int err; | |
386 | ||
387 | for (index = 0; index < DSA_MAX_SWITCHES; index++) { | |
388 | ds = dst->ds[index]; | |
389 | if (!ds) | |
390 | continue; | |
391 | ||
392 | err = dsa_ds_apply(dst, ds); | |
393 | if (err) | |
394 | return err; | |
395 | } | |
396 | ||
0c73c523 FF |
397 | err = dsa_cpu_port_ethtool_setup(dst->ds[0]); |
398 | if (err) | |
399 | return err; | |
400 | ||
83c0afae AL |
401 | /* If we use a tagging format that doesn't have an ethertype |
402 | * field, make sure that all packets from this point on get | |
403 | * sent to the tag format's receive function. | |
404 | */ | |
405 | wmb(); | |
406 | dst->master_netdev->dsa_ptr = (void *)dst; | |
407 | dst->applied = true; | |
408 | ||
409 | return 0; | |
410 | } | |
411 | ||
412 | static void dsa_dst_unapply(struct dsa_switch_tree *dst) | |
413 | { | |
414 | struct dsa_switch *ds; | |
415 | u32 index; | |
416 | ||
417 | if (!dst->applied) | |
418 | return; | |
419 | ||
420 | dst->master_netdev->dsa_ptr = NULL; | |
421 | ||
422 | /* If we used a tagging format that doesn't have an ethertype | |
423 | * field, make sure that all packets from this point get sent | |
424 | * without the tag and go through the regular receive path. | |
425 | */ | |
426 | wmb(); | |
427 | ||
428 | for (index = 0; index < DSA_MAX_SWITCHES; index++) { | |
429 | ds = dst->ds[index]; | |
430 | if (!ds) | |
431 | continue; | |
432 | ||
433 | dsa_ds_unapply(dst, ds); | |
434 | } | |
435 | ||
0c73c523 FF |
436 | dsa_cpu_port_ethtool_restore(dst->ds[0]); |
437 | ||
83c0afae AL |
438 | pr_info("DSA: tree %d unapplied\n", dst->tree); |
439 | dst->applied = false; | |
440 | } | |
441 | ||
442 | static int dsa_cpu_parse(struct device_node *port, u32 index, | |
443 | struct dsa_switch_tree *dst, | |
444 | struct dsa_switch *ds) | |
445 | { | |
7b314362 | 446 | enum dsa_tag_protocol tag_protocol; |
83c0afae AL |
447 | struct net_device *ethernet_dev; |
448 | struct device_node *ethernet; | |
449 | ||
450 | ethernet = of_parse_phandle(port, "ethernet", 0); | |
451 | if (!ethernet) | |
452 | return -EINVAL; | |
453 | ||
454 | ethernet_dev = of_find_net_device_by_node(ethernet); | |
455 | if (!ethernet_dev) | |
456 | return -EPROBE_DEFER; | |
457 | ||
458 | if (!ds->master_netdev) | |
459 | ds->master_netdev = ethernet_dev; | |
460 | ||
461 | if (!dst->master_netdev) | |
462 | dst->master_netdev = ethernet_dev; | |
463 | ||
464 | if (dst->cpu_switch == -1) { | |
465 | dst->cpu_switch = ds->index; | |
466 | dst->cpu_port = index; | |
467 | } | |
468 | ||
9d490b4e | 469 | tag_protocol = ds->ops->get_tag_protocol(ds); |
7b314362 | 470 | dst->tag_ops = dsa_resolve_tag_protocol(tag_protocol); |
83c0afae AL |
471 | if (IS_ERR(dst->tag_ops)) { |
472 | dev_warn(ds->dev, "No tagger for this switch\n"); | |
473 | return PTR_ERR(dst->tag_ops); | |
474 | } | |
475 | ||
476 | dst->rcv = dst->tag_ops->rcv; | |
477 | ||
478 | return 0; | |
479 | } | |
480 | ||
481 | static int dsa_ds_parse(struct dsa_switch_tree *dst, struct dsa_switch *ds) | |
482 | { | |
483 | struct device_node *port; | |
484 | u32 index; | |
485 | int err; | |
486 | ||
487 | for (index = 0; index < DSA_MAX_PORTS; index++) { | |
488 | port = ds->ports[index].dn; | |
489 | if (!port) | |
490 | continue; | |
491 | ||
492 | if (dsa_port_is_cpu(port)) { | |
493 | err = dsa_cpu_parse(port, index, dst, ds); | |
494 | if (err) | |
495 | return err; | |
496 | } | |
497 | } | |
498 | ||
499 | pr_info("DSA: switch %d %d parsed\n", dst->tree, ds->index); | |
500 | ||
501 | return 0; | |
502 | } | |
503 | ||
504 | static int dsa_dst_parse(struct dsa_switch_tree *dst) | |
505 | { | |
506 | struct dsa_switch *ds; | |
507 | u32 index; | |
508 | int err; | |
509 | ||
510 | for (index = 0; index < DSA_MAX_SWITCHES; index++) { | |
511 | ds = dst->ds[index]; | |
512 | if (!ds) | |
513 | continue; | |
514 | ||
515 | err = dsa_ds_parse(dst, ds); | |
516 | if (err) | |
517 | return err; | |
518 | } | |
519 | ||
520 | if (!dst->master_netdev) { | |
521 | pr_warn("Tree has no master device\n"); | |
522 | return -EINVAL; | |
523 | } | |
524 | ||
525 | pr_info("DSA: tree %d parsed\n", dst->tree); | |
526 | ||
527 | return 0; | |
528 | } | |
529 | ||
530 | static int dsa_parse_ports_dn(struct device_node *ports, struct dsa_switch *ds) | |
531 | { | |
532 | struct device_node *port; | |
533 | int err; | |
534 | u32 reg; | |
535 | ||
536 | for_each_available_child_of_node(ports, port) { | |
537 | err = of_property_read_u32(port, "reg", ®); | |
538 | if (err) | |
539 | return err; | |
540 | ||
541 | if (reg >= DSA_MAX_PORTS) | |
542 | return -EINVAL; | |
543 | ||
544 | ds->ports[reg].dn = port; | |
6e830d8f | 545 | |
9d490b4e | 546 | /* Initialize enabled_port_mask now for ops->setup() |
6e830d8f FF |
547 | * to have access to a correct value, just like what |
548 | * net/dsa/dsa.c::dsa_switch_setup_one does. | |
549 | */ | |
550 | if (!dsa_port_is_cpu(port)) | |
551 | ds->enabled_port_mask |= 1 << reg; | |
83c0afae AL |
552 | } |
553 | ||
554 | return 0; | |
555 | } | |
556 | ||
557 | static int dsa_parse_member(struct device_node *np, u32 *tree, u32 *index) | |
558 | { | |
559 | int err; | |
560 | ||
561 | *tree = *index = 0; | |
562 | ||
563 | err = of_property_read_u32_index(np, "dsa,member", 0, tree); | |
564 | if (err) { | |
565 | /* Does not exist, but it is optional */ | |
566 | if (err == -EINVAL) | |
567 | return 0; | |
568 | return err; | |
569 | } | |
570 | ||
571 | err = of_property_read_u32_index(np, "dsa,member", 1, index); | |
572 | if (err) | |
573 | return err; | |
574 | ||
575 | if (*index >= DSA_MAX_SWITCHES) | |
576 | return -EINVAL; | |
577 | ||
578 | return 0; | |
579 | } | |
580 | ||
581 | static struct device_node *dsa_get_ports(struct dsa_switch *ds, | |
582 | struct device_node *np) | |
583 | { | |
584 | struct device_node *ports; | |
585 | ||
586 | ports = of_get_child_by_name(np, "ports"); | |
587 | if (!ports) { | |
588 | dev_err(ds->dev, "no ports child node found\n"); | |
589 | return ERR_PTR(-EINVAL); | |
590 | } | |
591 | ||
592 | return ports; | |
593 | } | |
594 | ||
595 | static int _dsa_register_switch(struct dsa_switch *ds, struct device_node *np) | |
596 | { | |
597 | struct device_node *ports = dsa_get_ports(ds, np); | |
598 | struct dsa_switch_tree *dst; | |
599 | u32 tree, index; | |
d390238c | 600 | int i, err; |
83c0afae AL |
601 | |
602 | err = dsa_parse_member(np, &tree, &index); | |
603 | if (err) | |
604 | return err; | |
605 | ||
606 | if (IS_ERR(ports)) | |
607 | return PTR_ERR(ports); | |
608 | ||
609 | err = dsa_parse_ports_dn(ports, ds); | |
610 | if (err) | |
611 | return err; | |
612 | ||
613 | dst = dsa_get_dst(tree); | |
614 | if (!dst) { | |
615 | dst = dsa_add_dst(tree); | |
616 | if (!dst) | |
617 | return -ENOMEM; | |
618 | } | |
619 | ||
620 | if (dst->ds[index]) { | |
621 | err = -EBUSY; | |
622 | goto out; | |
623 | } | |
624 | ||
625 | ds->dst = dst; | |
626 | ds->index = index; | |
d390238c VD |
627 | |
628 | /* Initialize the routing table */ | |
629 | for (i = 0; i < DSA_MAX_SWITCHES; ++i) | |
630 | ds->rtable[i] = DSA_RTABLE_NONE; | |
631 | ||
83c0afae AL |
632 | dsa_dst_add_ds(dst, ds, index); |
633 | ||
634 | err = dsa_dst_complete(dst); | |
635 | if (err < 0) | |
636 | goto out_del_dst; | |
637 | ||
638 | if (err == 1) { | |
639 | /* Not all switches registered yet */ | |
640 | err = 0; | |
641 | goto out; | |
642 | } | |
643 | ||
644 | if (dst->applied) { | |
645 | pr_info("DSA: Disjoint trees?\n"); | |
646 | return -EINVAL; | |
647 | } | |
648 | ||
649 | err = dsa_dst_parse(dst); | |
650 | if (err) | |
651 | goto out_del_dst; | |
652 | ||
653 | err = dsa_dst_apply(dst); | |
654 | if (err) { | |
655 | dsa_dst_unapply(dst); | |
656 | goto out_del_dst; | |
657 | } | |
658 | ||
659 | dsa_put_dst(dst); | |
660 | return 0; | |
661 | ||
662 | out_del_dst: | |
663 | dsa_dst_del_ds(dst, ds, ds->index); | |
664 | out: | |
665 | dsa_put_dst(dst); | |
666 | ||
667 | return err; | |
668 | } | |
669 | ||
670 | int dsa_register_switch(struct dsa_switch *ds, struct device_node *np) | |
671 | { | |
672 | int err; | |
673 | ||
674 | mutex_lock(&dsa2_mutex); | |
675 | err = _dsa_register_switch(ds, np); | |
676 | mutex_unlock(&dsa2_mutex); | |
677 | ||
678 | return err; | |
679 | } | |
680 | EXPORT_SYMBOL_GPL(dsa_register_switch); | |
681 | ||
85c22bad | 682 | static void _dsa_unregister_switch(struct dsa_switch *ds) |
83c0afae AL |
683 | { |
684 | struct dsa_switch_tree *dst = ds->dst; | |
685 | ||
686 | dsa_dst_unapply(dst); | |
687 | ||
688 | dsa_dst_del_ds(dst, ds, ds->index); | |
689 | } | |
690 | ||
691 | void dsa_unregister_switch(struct dsa_switch *ds) | |
692 | { | |
693 | mutex_lock(&dsa2_mutex); | |
694 | _dsa_unregister_switch(ds); | |
695 | mutex_unlock(&dsa2_mutex); | |
696 | } | |
697 | EXPORT_SYMBOL_GPL(dsa_unregister_switch); |