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Commit | Line | Data |
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91da11f8 LB |
1 | /* |
2 | * net/dsa/dsa.c - Hardware switch handling | |
e84665c9 | 3 | * Copyright (c) 2008-2009 Marvell Semiconductor |
5e95329b | 4 | * Copyright (c) 2013 Florian Fainelli <florian@openwrt.org> |
91da11f8 LB |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | */ | |
11 | ||
12 | #include <linux/list.h> | |
91da11f8 | 13 | #include <linux/platform_device.h> |
5a0e3ad6 | 14 | #include <linux/slab.h> |
3a9a231d | 15 | #include <linux/module.h> |
91da11f8 | 16 | #include <net/dsa.h> |
5e95329b FF |
17 | #include <linux/of.h> |
18 | #include <linux/of_mdio.h> | |
19 | #include <linux/of_platform.h> | |
91da11f8 LB |
20 | #include "dsa_priv.h" |
21 | ||
22 | char dsa_driver_version[] = "0.1"; | |
23 | ||
24 | ||
25 | /* switch driver registration ***********************************************/ | |
26 | static DEFINE_MUTEX(dsa_switch_drivers_mutex); | |
27 | static LIST_HEAD(dsa_switch_drivers); | |
28 | ||
29 | void register_switch_driver(struct dsa_switch_driver *drv) | |
30 | { | |
31 | mutex_lock(&dsa_switch_drivers_mutex); | |
32 | list_add_tail(&drv->list, &dsa_switch_drivers); | |
33 | mutex_unlock(&dsa_switch_drivers_mutex); | |
34 | } | |
ad293b8a | 35 | EXPORT_SYMBOL_GPL(register_switch_driver); |
91da11f8 LB |
36 | |
37 | void unregister_switch_driver(struct dsa_switch_driver *drv) | |
38 | { | |
39 | mutex_lock(&dsa_switch_drivers_mutex); | |
40 | list_del_init(&drv->list); | |
41 | mutex_unlock(&dsa_switch_drivers_mutex); | |
42 | } | |
ad293b8a | 43 | EXPORT_SYMBOL_GPL(unregister_switch_driver); |
91da11f8 LB |
44 | |
45 | static struct dsa_switch_driver * | |
b4d2394d | 46 | dsa_switch_probe(struct device *host_dev, int sw_addr, char **_name) |
91da11f8 LB |
47 | { |
48 | struct dsa_switch_driver *ret; | |
49 | struct list_head *list; | |
50 | char *name; | |
51 | ||
52 | ret = NULL; | |
53 | name = NULL; | |
54 | ||
55 | mutex_lock(&dsa_switch_drivers_mutex); | |
56 | list_for_each(list, &dsa_switch_drivers) { | |
57 | struct dsa_switch_driver *drv; | |
58 | ||
59 | drv = list_entry(list, struct dsa_switch_driver, list); | |
60 | ||
b4d2394d | 61 | name = drv->probe(host_dev, sw_addr); |
91da11f8 LB |
62 | if (name != NULL) { |
63 | ret = drv; | |
64 | break; | |
65 | } | |
66 | } | |
67 | mutex_unlock(&dsa_switch_drivers_mutex); | |
68 | ||
69 | *_name = name; | |
70 | ||
71 | return ret; | |
72 | } | |
73 | ||
74 | ||
75 | /* basic switch operations **************************************************/ | |
76 | static struct dsa_switch * | |
e84665c9 | 77 | dsa_switch_setup(struct dsa_switch_tree *dst, int index, |
b4d2394d | 78 | struct device *parent, struct device *host_dev) |
91da11f8 | 79 | { |
e84665c9 LB |
80 | struct dsa_chip_data *pd = dst->pd->chip + index; |
81 | struct dsa_switch_driver *drv; | |
91da11f8 LB |
82 | struct dsa_switch *ds; |
83 | int ret; | |
91da11f8 LB |
84 | char *name; |
85 | int i; | |
f9bf5a2c | 86 | bool valid_name_found = false; |
91da11f8 LB |
87 | |
88 | /* | |
89 | * Probe for switch model. | |
90 | */ | |
b4d2394d | 91 | drv = dsa_switch_probe(host_dev, pd->sw_addr, &name); |
91da11f8 | 92 | if (drv == NULL) { |
e84665c9 LB |
93 | printk(KERN_ERR "%s[%d]: could not detect attached switch\n", |
94 | dst->master_netdev->name, index); | |
91da11f8 LB |
95 | return ERR_PTR(-EINVAL); |
96 | } | |
e84665c9 LB |
97 | printk(KERN_INFO "%s[%d]: detected a %s switch\n", |
98 | dst->master_netdev->name, index, name); | |
91da11f8 LB |
99 | |
100 | ||
101 | /* | |
102 | * Allocate and initialise switch state. | |
103 | */ | |
104 | ds = kzalloc(sizeof(*ds) + drv->priv_size, GFP_KERNEL); | |
105 | if (ds == NULL) | |
106 | return ERR_PTR(-ENOMEM); | |
107 | ||
e84665c9 LB |
108 | ds->dst = dst; |
109 | ds->index = index; | |
110 | ds->pd = dst->pd->chip + index; | |
91da11f8 | 111 | ds->drv = drv; |
b4d2394d | 112 | ds->master_dev = host_dev; |
91da11f8 LB |
113 | |
114 | /* | |
115 | * Validate supplied switch configuration. | |
116 | */ | |
91da11f8 LB |
117 | for (i = 0; i < DSA_MAX_PORTS; i++) { |
118 | char *name; | |
119 | ||
120 | name = pd->port_names[i]; | |
121 | if (name == NULL) | |
122 | continue; | |
123 | ||
124 | if (!strcmp(name, "cpu")) { | |
e84665c9 | 125 | if (dst->cpu_switch != -1) { |
91da11f8 LB |
126 | printk(KERN_ERR "multiple cpu ports?!\n"); |
127 | ret = -EINVAL; | |
128 | goto out; | |
129 | } | |
e84665c9 LB |
130 | dst->cpu_switch = index; |
131 | dst->cpu_port = i; | |
132 | } else if (!strcmp(name, "dsa")) { | |
133 | ds->dsa_port_mask |= 1 << i; | |
91da11f8 | 134 | } else { |
e84665c9 | 135 | ds->phys_port_mask |= 1 << i; |
91da11f8 | 136 | } |
f9bf5a2c | 137 | valid_name_found = true; |
91da11f8 LB |
138 | } |
139 | ||
f9bf5a2c FF |
140 | if (!valid_name_found && i == DSA_MAX_PORTS) { |
141 | ret = -EINVAL; | |
142 | goto out; | |
143 | } | |
91da11f8 | 144 | |
0d8bcdd3 FF |
145 | /* Make the built-in MII bus mask match the number of ports, |
146 | * switch drivers can override this later | |
147 | */ | |
148 | ds->phys_mii_mask = ds->phys_port_mask; | |
149 | ||
91da11f8 | 150 | /* |
e84665c9 LB |
151 | * If the CPU connects to this switch, set the switch tree |
152 | * tagging protocol to the preferred tagging format of this | |
153 | * switch. | |
91da11f8 | 154 | */ |
5075314e AD |
155 | if (dst->cpu_switch == index) { |
156 | switch (drv->tag_protocol) { | |
157 | #ifdef CONFIG_NET_DSA_TAG_DSA | |
158 | case DSA_TAG_PROTO_DSA: | |
159 | dst->rcv = dsa_netdev_ops.rcv; | |
160 | break; | |
161 | #endif | |
162 | #ifdef CONFIG_NET_DSA_TAG_EDSA | |
163 | case DSA_TAG_PROTO_EDSA: | |
164 | dst->rcv = edsa_netdev_ops.rcv; | |
165 | break; | |
166 | #endif | |
167 | #ifdef CONFIG_NET_DSA_TAG_TRAILER | |
168 | case DSA_TAG_PROTO_TRAILER: | |
169 | dst->rcv = trailer_netdev_ops.rcv; | |
170 | break; | |
171 | #endif | |
172 | #ifdef CONFIG_NET_DSA_TAG_BRCM | |
173 | case DSA_TAG_PROTO_BRCM: | |
174 | dst->rcv = brcm_netdev_ops.rcv; | |
175 | break; | |
176 | #endif | |
177 | default: | |
178 | break; | |
179 | } | |
91da11f8 | 180 | |
5075314e AD |
181 | dst->tag_protocol = drv->tag_protocol; |
182 | } | |
91da11f8 LB |
183 | |
184 | /* | |
185 | * Do basic register setup. | |
186 | */ | |
187 | ret = drv->setup(ds); | |
188 | if (ret < 0) | |
189 | goto out; | |
190 | ||
e84665c9 | 191 | ret = drv->set_addr(ds, dst->master_netdev->dev_addr); |
91da11f8 LB |
192 | if (ret < 0) |
193 | goto out; | |
194 | ||
195 | ds->slave_mii_bus = mdiobus_alloc(); | |
196 | if (ds->slave_mii_bus == NULL) { | |
197 | ret = -ENOMEM; | |
198 | goto out; | |
199 | } | |
200 | dsa_slave_mii_bus_init(ds); | |
201 | ||
202 | ret = mdiobus_register(ds->slave_mii_bus); | |
203 | if (ret < 0) | |
204 | goto out_free; | |
205 | ||
206 | ||
207 | /* | |
208 | * Create network devices for physical switch ports. | |
209 | */ | |
91da11f8 LB |
210 | for (i = 0; i < DSA_MAX_PORTS; i++) { |
211 | struct net_device *slave_dev; | |
212 | ||
e84665c9 | 213 | if (!(ds->phys_port_mask & (1 << i))) |
91da11f8 LB |
214 | continue; |
215 | ||
216 | slave_dev = dsa_slave_create(ds, parent, i, pd->port_names[i]); | |
217 | if (slave_dev == NULL) { | |
e84665c9 LB |
218 | printk(KERN_ERR "%s[%d]: can't create dsa " |
219 | "slave device for port %d(%s)\n", | |
220 | dst->master_netdev->name, | |
221 | index, i, pd->port_names[i]); | |
91da11f8 LB |
222 | continue; |
223 | } | |
224 | ||
225 | ds->ports[i] = slave_dev; | |
226 | } | |
227 | ||
228 | return ds; | |
229 | ||
230 | out_free: | |
231 | mdiobus_free(ds->slave_mii_bus); | |
232 | out: | |
91da11f8 LB |
233 | kfree(ds); |
234 | return ERR_PTR(ret); | |
235 | } | |
236 | ||
237 | static void dsa_switch_destroy(struct dsa_switch *ds) | |
238 | { | |
239 | } | |
240 | ||
e506d405 | 241 | #ifdef CONFIG_PM_SLEEP |
24462549 FF |
242 | static int dsa_switch_suspend(struct dsa_switch *ds) |
243 | { | |
244 | int i, ret = 0; | |
245 | ||
246 | /* Suspend slave network devices */ | |
247 | for (i = 0; i < DSA_MAX_PORTS; i++) { | |
248 | if (!(ds->phys_port_mask & (1 << i))) | |
249 | continue; | |
250 | ||
251 | ret = dsa_slave_suspend(ds->ports[i]); | |
252 | if (ret) | |
253 | return ret; | |
254 | } | |
255 | ||
256 | if (ds->drv->suspend) | |
257 | ret = ds->drv->suspend(ds); | |
258 | ||
259 | return ret; | |
260 | } | |
261 | ||
262 | static int dsa_switch_resume(struct dsa_switch *ds) | |
263 | { | |
264 | int i, ret = 0; | |
265 | ||
266 | if (ds->drv->resume) | |
267 | ret = ds->drv->resume(ds); | |
268 | ||
269 | if (ret) | |
270 | return ret; | |
271 | ||
272 | /* Resume slave network devices */ | |
273 | for (i = 0; i < DSA_MAX_PORTS; i++) { | |
274 | if (!(ds->phys_port_mask & (1 << i))) | |
275 | continue; | |
276 | ||
277 | ret = dsa_slave_resume(ds->ports[i]); | |
278 | if (ret) | |
279 | return ret; | |
280 | } | |
281 | ||
282 | return 0; | |
283 | } | |
e506d405 | 284 | #endif |
24462549 | 285 | |
91da11f8 LB |
286 | |
287 | /* link polling *************************************************************/ | |
288 | static void dsa_link_poll_work(struct work_struct *ugly) | |
289 | { | |
e84665c9 LB |
290 | struct dsa_switch_tree *dst; |
291 | int i; | |
292 | ||
293 | dst = container_of(ugly, struct dsa_switch_tree, link_poll_work); | |
91da11f8 | 294 | |
e84665c9 LB |
295 | for (i = 0; i < dst->pd->nr_chips; i++) { |
296 | struct dsa_switch *ds = dst->ds[i]; | |
91da11f8 | 297 | |
e84665c9 LB |
298 | if (ds != NULL && ds->drv->poll_link != NULL) |
299 | ds->drv->poll_link(ds); | |
300 | } | |
301 | ||
302 | mod_timer(&dst->link_poll_timer, round_jiffies(jiffies + HZ)); | |
91da11f8 LB |
303 | } |
304 | ||
e84665c9 | 305 | static void dsa_link_poll_timer(unsigned long _dst) |
91da11f8 | 306 | { |
e84665c9 | 307 | struct dsa_switch_tree *dst = (void *)_dst; |
91da11f8 | 308 | |
e84665c9 | 309 | schedule_work(&dst->link_poll_work); |
91da11f8 LB |
310 | } |
311 | ||
312 | ||
313 | /* platform driver init and cleanup *****************************************/ | |
314 | static int dev_is_class(struct device *dev, void *class) | |
315 | { | |
316 | if (dev->class != NULL && !strcmp(dev->class->name, class)) | |
317 | return 1; | |
318 | ||
319 | return 0; | |
320 | } | |
321 | ||
322 | static struct device *dev_find_class(struct device *parent, char *class) | |
323 | { | |
324 | if (dev_is_class(parent, class)) { | |
325 | get_device(parent); | |
326 | return parent; | |
327 | } | |
328 | ||
329 | return device_find_child(parent, class, dev_is_class); | |
330 | } | |
331 | ||
b4d2394d | 332 | struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev) |
91da11f8 LB |
333 | { |
334 | struct device *d; | |
335 | ||
336 | d = dev_find_class(dev, "mdio_bus"); | |
337 | if (d != NULL) { | |
338 | struct mii_bus *bus; | |
339 | ||
340 | bus = to_mii_bus(d); | |
341 | put_device(d); | |
342 | ||
343 | return bus; | |
344 | } | |
345 | ||
346 | return NULL; | |
347 | } | |
b4d2394d | 348 | EXPORT_SYMBOL_GPL(dsa_host_dev_to_mii_bus); |
91da11f8 LB |
349 | |
350 | static struct net_device *dev_to_net_device(struct device *dev) | |
351 | { | |
352 | struct device *d; | |
353 | ||
354 | d = dev_find_class(dev, "net"); | |
355 | if (d != NULL) { | |
356 | struct net_device *nd; | |
357 | ||
358 | nd = to_net_dev(d); | |
359 | dev_hold(nd); | |
360 | put_device(d); | |
361 | ||
362 | return nd; | |
363 | } | |
364 | ||
365 | return NULL; | |
366 | } | |
367 | ||
5e95329b FF |
368 | #ifdef CONFIG_OF |
369 | static int dsa_of_setup_routing_table(struct dsa_platform_data *pd, | |
370 | struct dsa_chip_data *cd, | |
371 | int chip_index, | |
372 | struct device_node *link) | |
373 | { | |
374 | int ret; | |
375 | const __be32 *reg; | |
376 | int link_port_addr; | |
377 | int link_sw_addr; | |
378 | struct device_node *parent_sw; | |
379 | int len; | |
380 | ||
381 | parent_sw = of_get_parent(link); | |
382 | if (!parent_sw) | |
383 | return -EINVAL; | |
384 | ||
385 | reg = of_get_property(parent_sw, "reg", &len); | |
386 | if (!reg || (len != sizeof(*reg) * 2)) | |
387 | return -EINVAL; | |
388 | ||
389 | link_sw_addr = be32_to_cpup(reg + 1); | |
390 | ||
391 | if (link_sw_addr >= pd->nr_chips) | |
392 | return -EINVAL; | |
393 | ||
394 | /* First time routing table allocation */ | |
395 | if (!cd->rtable) { | |
396 | cd->rtable = kmalloc(pd->nr_chips * sizeof(s8), GFP_KERNEL); | |
397 | if (!cd->rtable) | |
398 | return -ENOMEM; | |
399 | ||
400 | /* default to no valid uplink/downlink */ | |
401 | memset(cd->rtable, -1, pd->nr_chips * sizeof(s8)); | |
402 | } | |
403 | ||
404 | reg = of_get_property(link, "reg", NULL); | |
405 | if (!reg) { | |
406 | ret = -EINVAL; | |
407 | goto out; | |
408 | } | |
409 | ||
410 | link_port_addr = be32_to_cpup(reg); | |
411 | ||
412 | cd->rtable[link_sw_addr] = link_port_addr; | |
413 | ||
414 | return 0; | |
415 | out: | |
416 | kfree(cd->rtable); | |
417 | return ret; | |
418 | } | |
419 | ||
21168245 FF |
420 | static void dsa_of_free_platform_data(struct dsa_platform_data *pd) |
421 | { | |
422 | int i; | |
423 | int port_index; | |
424 | ||
425 | for (i = 0; i < pd->nr_chips; i++) { | |
426 | port_index = 0; | |
5f64a7db | 427 | while (port_index < DSA_MAX_PORTS) { |
1f74714f | 428 | kfree(pd->chip[i].port_names[port_index]); |
5f64a7db FF |
429 | port_index++; |
430 | } | |
21168245 FF |
431 | kfree(pd->chip[i].rtable); |
432 | } | |
433 | kfree(pd->chip); | |
434 | } | |
435 | ||
5e95329b FF |
436 | static int dsa_of_probe(struct platform_device *pdev) |
437 | { | |
438 | struct device_node *np = pdev->dev.of_node; | |
439 | struct device_node *child, *mdio, *ethernet, *port, *link; | |
440 | struct mii_bus *mdio_bus; | |
441 | struct platform_device *ethernet_dev; | |
442 | struct dsa_platform_data *pd; | |
443 | struct dsa_chip_data *cd; | |
444 | const char *port_name; | |
445 | int chip_index, port_index; | |
446 | const unsigned int *sw_addr, *port_reg; | |
21168245 | 447 | int ret; |
5e95329b FF |
448 | |
449 | mdio = of_parse_phandle(np, "dsa,mii-bus", 0); | |
450 | if (!mdio) | |
451 | return -EINVAL; | |
452 | ||
453 | mdio_bus = of_mdio_find_bus(mdio); | |
454 | if (!mdio_bus) | |
455 | return -EINVAL; | |
456 | ||
457 | ethernet = of_parse_phandle(np, "dsa,ethernet", 0); | |
458 | if (!ethernet) | |
459 | return -EINVAL; | |
460 | ||
461 | ethernet_dev = of_find_device_by_node(ethernet); | |
462 | if (!ethernet_dev) | |
463 | return -ENODEV; | |
464 | ||
465 | pd = kzalloc(sizeof(*pd), GFP_KERNEL); | |
466 | if (!pd) | |
467 | return -ENOMEM; | |
468 | ||
469 | pdev->dev.platform_data = pd; | |
470 | pd->netdev = ðernet_dev->dev; | |
471 | pd->nr_chips = of_get_child_count(np); | |
472 | if (pd->nr_chips > DSA_MAX_SWITCHES) | |
473 | pd->nr_chips = DSA_MAX_SWITCHES; | |
474 | ||
475 | pd->chip = kzalloc(pd->nr_chips * sizeof(struct dsa_chip_data), | |
476 | GFP_KERNEL); | |
477 | if (!pd->chip) { | |
478 | ret = -ENOMEM; | |
479 | goto out_free; | |
480 | } | |
481 | ||
d1c0b471 | 482 | chip_index = -1; |
5e95329b | 483 | for_each_available_child_of_node(np, child) { |
d1c0b471 | 484 | chip_index++; |
5e95329b FF |
485 | cd = &pd->chip[chip_index]; |
486 | ||
fa981d9a | 487 | cd->of_node = child; |
c1f570a6 | 488 | cd->host_dev = &mdio_bus->dev; |
5e95329b FF |
489 | |
490 | sw_addr = of_get_property(child, "reg", NULL); | |
491 | if (!sw_addr) | |
492 | continue; | |
493 | ||
494 | cd->sw_addr = be32_to_cpup(sw_addr); | |
495 | if (cd->sw_addr > PHY_MAX_ADDR) | |
496 | continue; | |
497 | ||
498 | for_each_available_child_of_node(child, port) { | |
499 | port_reg = of_get_property(port, "reg", NULL); | |
500 | if (!port_reg) | |
501 | continue; | |
502 | ||
503 | port_index = be32_to_cpup(port_reg); | |
504 | ||
505 | port_name = of_get_property(port, "label", NULL); | |
506 | if (!port_name) | |
507 | continue; | |
508 | ||
bd47497a FF |
509 | cd->port_dn[port_index] = port; |
510 | ||
5e95329b FF |
511 | cd->port_names[port_index] = kstrdup(port_name, |
512 | GFP_KERNEL); | |
513 | if (!cd->port_names[port_index]) { | |
514 | ret = -ENOMEM; | |
515 | goto out_free_chip; | |
516 | } | |
517 | ||
518 | link = of_parse_phandle(port, "link", 0); | |
519 | ||
520 | if (!strcmp(port_name, "dsa") && link && | |
521 | pd->nr_chips > 1) { | |
522 | ret = dsa_of_setup_routing_table(pd, cd, | |
523 | chip_index, link); | |
524 | if (ret) | |
525 | goto out_free_chip; | |
526 | } | |
527 | ||
528 | if (port_index == DSA_MAX_PORTS) | |
529 | break; | |
530 | } | |
531 | } | |
532 | ||
533 | return 0; | |
534 | ||
535 | out_free_chip: | |
21168245 | 536 | dsa_of_free_platform_data(pd); |
5e95329b FF |
537 | out_free: |
538 | kfree(pd); | |
539 | pdev->dev.platform_data = NULL; | |
540 | return ret; | |
541 | } | |
542 | ||
543 | static void dsa_of_remove(struct platform_device *pdev) | |
544 | { | |
545 | struct dsa_platform_data *pd = pdev->dev.platform_data; | |
5e95329b FF |
546 | |
547 | if (!pdev->dev.of_node) | |
548 | return; | |
549 | ||
21168245 | 550 | dsa_of_free_platform_data(pd); |
5e95329b FF |
551 | kfree(pd); |
552 | } | |
553 | #else | |
554 | static inline int dsa_of_probe(struct platform_device *pdev) | |
555 | { | |
556 | return 0; | |
557 | } | |
558 | ||
559 | static inline void dsa_of_remove(struct platform_device *pdev) | |
560 | { | |
561 | } | |
562 | #endif | |
563 | ||
91da11f8 LB |
564 | static int dsa_probe(struct platform_device *pdev) |
565 | { | |
566 | static int dsa_version_printed; | |
567 | struct dsa_platform_data *pd = pdev->dev.platform_data; | |
568 | struct net_device *dev; | |
e84665c9 | 569 | struct dsa_switch_tree *dst; |
5e95329b | 570 | int i, ret; |
91da11f8 LB |
571 | |
572 | if (!dsa_version_printed++) | |
573 | printk(KERN_NOTICE "Distributed Switch Architecture " | |
574 | "driver version %s\n", dsa_driver_version); | |
575 | ||
5e95329b FF |
576 | if (pdev->dev.of_node) { |
577 | ret = dsa_of_probe(pdev); | |
578 | if (ret) | |
579 | return ret; | |
580 | ||
581 | pd = pdev->dev.platform_data; | |
582 | } | |
583 | ||
e84665c9 | 584 | if (pd == NULL || pd->netdev == NULL) |
91da11f8 LB |
585 | return -EINVAL; |
586 | ||
587 | dev = dev_to_net_device(pd->netdev); | |
5e95329b FF |
588 | if (dev == NULL) { |
589 | ret = -EINVAL; | |
590 | goto out; | |
591 | } | |
91da11f8 LB |
592 | |
593 | if (dev->dsa_ptr != NULL) { | |
594 | dev_put(dev); | |
5e95329b FF |
595 | ret = -EEXIST; |
596 | goto out; | |
91da11f8 LB |
597 | } |
598 | ||
e84665c9 LB |
599 | dst = kzalloc(sizeof(*dst), GFP_KERNEL); |
600 | if (dst == NULL) { | |
91da11f8 | 601 | dev_put(dev); |
5e95329b FF |
602 | ret = -ENOMEM; |
603 | goto out; | |
91da11f8 LB |
604 | } |
605 | ||
e84665c9 LB |
606 | platform_set_drvdata(pdev, dst); |
607 | ||
608 | dst->pd = pd; | |
609 | dst->master_netdev = dev; | |
610 | dst->cpu_switch = -1; | |
611 | dst->cpu_port = -1; | |
612 | ||
613 | for (i = 0; i < pd->nr_chips; i++) { | |
e84665c9 LB |
614 | struct dsa_switch *ds; |
615 | ||
b4d2394d | 616 | ds = dsa_switch_setup(dst, i, &pdev->dev, pd->chip[i].host_dev); |
e84665c9 LB |
617 | if (IS_ERR(ds)) { |
618 | printk(KERN_ERR "%s[%d]: couldn't create dsa switch " | |
619 | "instance (error %ld)\n", dev->name, i, | |
620 | PTR_ERR(ds)); | |
621 | continue; | |
622 | } | |
623 | ||
624 | dst->ds[i] = ds; | |
625 | if (ds->drv->poll_link != NULL) | |
626 | dst->link_poll_needed = 1; | |
91da11f8 LB |
627 | } |
628 | ||
e84665c9 LB |
629 | /* |
630 | * If we use a tagging format that doesn't have an ethertype | |
631 | * field, make sure that all packets from this point on get | |
632 | * sent to the tag format's receive function. | |
633 | */ | |
634 | wmb(); | |
635 | dev->dsa_ptr = (void *)dst; | |
636 | ||
637 | if (dst->link_poll_needed) { | |
638 | INIT_WORK(&dst->link_poll_work, dsa_link_poll_work); | |
639 | init_timer(&dst->link_poll_timer); | |
640 | dst->link_poll_timer.data = (unsigned long)dst; | |
641 | dst->link_poll_timer.function = dsa_link_poll_timer; | |
642 | dst->link_poll_timer.expires = round_jiffies(jiffies + HZ); | |
643 | add_timer(&dst->link_poll_timer); | |
644 | } | |
91da11f8 LB |
645 | |
646 | return 0; | |
5e95329b FF |
647 | |
648 | out: | |
649 | dsa_of_remove(pdev); | |
650 | ||
651 | return ret; | |
91da11f8 LB |
652 | } |
653 | ||
654 | static int dsa_remove(struct platform_device *pdev) | |
655 | { | |
e84665c9 LB |
656 | struct dsa_switch_tree *dst = platform_get_drvdata(pdev); |
657 | int i; | |
91da11f8 | 658 | |
e84665c9 LB |
659 | if (dst->link_poll_needed) |
660 | del_timer_sync(&dst->link_poll_timer); | |
91da11f8 | 661 | |
43829731 | 662 | flush_work(&dst->link_poll_work); |
91da11f8 | 663 | |
e84665c9 LB |
664 | for (i = 0; i < dst->pd->nr_chips; i++) { |
665 | struct dsa_switch *ds = dst->ds[i]; | |
666 | ||
667 | if (ds != NULL) | |
668 | dsa_switch_destroy(ds); | |
669 | } | |
91da11f8 | 670 | |
5e95329b FF |
671 | dsa_of_remove(pdev); |
672 | ||
91da11f8 LB |
673 | return 0; |
674 | } | |
675 | ||
676 | static void dsa_shutdown(struct platform_device *pdev) | |
677 | { | |
678 | } | |
679 | ||
3e8a72d1 FF |
680 | static int dsa_switch_rcv(struct sk_buff *skb, struct net_device *dev, |
681 | struct packet_type *pt, struct net_device *orig_dev) | |
682 | { | |
683 | struct dsa_switch_tree *dst = dev->dsa_ptr; | |
684 | ||
685 | if (unlikely(dst == NULL)) { | |
686 | kfree_skb(skb); | |
687 | return 0; | |
688 | } | |
689 | ||
5075314e | 690 | return dst->rcv(skb, dev, pt, orig_dev); |
3e8a72d1 FF |
691 | } |
692 | ||
61b7363f | 693 | static struct packet_type dsa_pack_type __read_mostly = { |
3e8a72d1 FF |
694 | .type = cpu_to_be16(ETH_P_XDSA), |
695 | .func = dsa_switch_rcv, | |
696 | }; | |
697 | ||
24462549 FF |
698 | #ifdef CONFIG_PM_SLEEP |
699 | static int dsa_suspend(struct device *d) | |
700 | { | |
701 | struct platform_device *pdev = to_platform_device(d); | |
702 | struct dsa_switch_tree *dst = platform_get_drvdata(pdev); | |
703 | int i, ret = 0; | |
704 | ||
705 | for (i = 0; i < dst->pd->nr_chips; i++) { | |
706 | struct dsa_switch *ds = dst->ds[i]; | |
707 | ||
708 | if (ds != NULL) | |
709 | ret = dsa_switch_suspend(ds); | |
710 | } | |
711 | ||
712 | return ret; | |
713 | } | |
714 | ||
715 | static int dsa_resume(struct device *d) | |
716 | { | |
717 | struct platform_device *pdev = to_platform_device(d); | |
718 | struct dsa_switch_tree *dst = platform_get_drvdata(pdev); | |
719 | int i, ret = 0; | |
720 | ||
721 | for (i = 0; i < dst->pd->nr_chips; i++) { | |
722 | struct dsa_switch *ds = dst->ds[i]; | |
723 | ||
724 | if (ds != NULL) | |
725 | ret = dsa_switch_resume(ds); | |
726 | } | |
727 | ||
728 | return ret; | |
729 | } | |
730 | #endif | |
731 | ||
732 | static SIMPLE_DEV_PM_OPS(dsa_pm_ops, dsa_suspend, dsa_resume); | |
733 | ||
5e95329b | 734 | static const struct of_device_id dsa_of_match_table[] = { |
246d7f77 | 735 | { .compatible = "brcm,bcm7445-switch-v4.0" }, |
5e95329b FF |
736 | { .compatible = "marvell,dsa", }, |
737 | {} | |
738 | }; | |
739 | MODULE_DEVICE_TABLE(of, dsa_of_match_table); | |
740 | ||
91da11f8 LB |
741 | static struct platform_driver dsa_driver = { |
742 | .probe = dsa_probe, | |
743 | .remove = dsa_remove, | |
744 | .shutdown = dsa_shutdown, | |
745 | .driver = { | |
746 | .name = "dsa", | |
747 | .owner = THIS_MODULE, | |
5e95329b | 748 | .of_match_table = dsa_of_match_table, |
24462549 | 749 | .pm = &dsa_pm_ops, |
91da11f8 LB |
750 | }, |
751 | }; | |
752 | ||
753 | static int __init dsa_init_module(void) | |
754 | { | |
7df899c3 BH |
755 | int rc; |
756 | ||
757 | rc = platform_driver_register(&dsa_driver); | |
758 | if (rc) | |
759 | return rc; | |
760 | ||
3e8a72d1 FF |
761 | dev_add_pack(&dsa_pack_type); |
762 | ||
7df899c3 | 763 | return 0; |
91da11f8 LB |
764 | } |
765 | module_init(dsa_init_module); | |
766 | ||
767 | static void __exit dsa_cleanup_module(void) | |
768 | { | |
3e8a72d1 | 769 | dev_remove_pack(&dsa_pack_type); |
91da11f8 LB |
770 | platform_driver_unregister(&dsa_driver); |
771 | } | |
772 | module_exit(dsa_cleanup_module); | |
773 | ||
577d6a7c | 774 | MODULE_AUTHOR("Lennert Buytenhek <buytenh@wantstofly.org>"); |
91da11f8 LB |
775 | MODULE_DESCRIPTION("Driver for Distributed Switch Architecture switch chips"); |
776 | MODULE_LICENSE("GPL"); | |
777 | MODULE_ALIAS("platform:dsa"); |