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a6a71f19 VD |
1 | /* |
2 | * net/dsa/legacy.c - Hardware switch handling | |
3 | * Copyright (c) 2008-2009 Marvell Semiconductor | |
4 | * Copyright (c) 2013 Florian Fainelli <florian@openwrt.org> | |
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/device.h> | |
13 | #include <linux/list.h> | |
14 | #include <linux/platform_device.h> | |
15 | #include <linux/slab.h> | |
16 | #include <linux/module.h> | |
17 | #include <linux/of.h> | |
18 | #include <linux/of_mdio.h> | |
19 | #include <linux/of_platform.h> | |
20 | #include <linux/of_net.h> | |
21 | #include <linux/netdevice.h> | |
22 | #include <linux/sysfs.h> | |
23 | #include <linux/phy_fixed.h> | |
24 | #include <linux/etherdevice.h> | |
ea5dd34b | 25 | |
a6a71f19 VD |
26 | #include "dsa_priv.h" |
27 | ||
28 | /* switch driver registration ***********************************************/ | |
29 | static DEFINE_MUTEX(dsa_switch_drivers_mutex); | |
30 | static LIST_HEAD(dsa_switch_drivers); | |
31 | ||
32 | void register_switch_driver(struct dsa_switch_driver *drv) | |
33 | { | |
34 | mutex_lock(&dsa_switch_drivers_mutex); | |
35 | list_add_tail(&drv->list, &dsa_switch_drivers); | |
36 | mutex_unlock(&dsa_switch_drivers_mutex); | |
37 | } | |
38 | EXPORT_SYMBOL_GPL(register_switch_driver); | |
39 | ||
40 | void unregister_switch_driver(struct dsa_switch_driver *drv) | |
41 | { | |
42 | mutex_lock(&dsa_switch_drivers_mutex); | |
43 | list_del_init(&drv->list); | |
44 | mutex_unlock(&dsa_switch_drivers_mutex); | |
45 | } | |
46 | EXPORT_SYMBOL_GPL(unregister_switch_driver); | |
47 | ||
48 | static const struct dsa_switch_ops * | |
49 | dsa_switch_probe(struct device *parent, struct device *host_dev, int sw_addr, | |
50 | const char **_name, void **priv) | |
51 | { | |
52 | const struct dsa_switch_ops *ret; | |
53 | struct list_head *list; | |
54 | const char *name; | |
55 | ||
56 | ret = NULL; | |
57 | name = NULL; | |
58 | ||
59 | mutex_lock(&dsa_switch_drivers_mutex); | |
60 | list_for_each(list, &dsa_switch_drivers) { | |
61 | const struct dsa_switch_ops *ops; | |
62 | struct dsa_switch_driver *drv; | |
63 | ||
64 | drv = list_entry(list, struct dsa_switch_driver, list); | |
65 | ops = drv->ops; | |
66 | ||
67 | name = ops->probe(parent, host_dev, sw_addr, priv); | |
68 | if (name != NULL) { | |
69 | ret = ops; | |
70 | break; | |
71 | } | |
72 | } | |
73 | mutex_unlock(&dsa_switch_drivers_mutex); | |
74 | ||
75 | *_name = name; | |
76 | ||
77 | return ret; | |
78 | } | |
79 | ||
80 | /* basic switch operations **************************************************/ | |
206e41fe | 81 | static int dsa_cpu_dsa_setups(struct dsa_switch *ds) |
a6a71f19 | 82 | { |
a6a71f19 VD |
83 | int ret, port; |
84 | ||
85 | for (port = 0; port < ds->num_ports; port++) { | |
86 | if (!(dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port))) | |
87 | continue; | |
88 | ||
47d0dcc3 | 89 | ret = dsa_cpu_dsa_setup(&ds->ports[port]); |
a6a71f19 VD |
90 | if (ret) |
91 | return ret; | |
92 | } | |
93 | return 0; | |
94 | } | |
95 | ||
206e41fe VD |
96 | static int dsa_switch_setup_one(struct dsa_switch *ds, |
97 | struct net_device *master) | |
a6a71f19 VD |
98 | { |
99 | const struct dsa_switch_ops *ops = ds->ops; | |
100 | struct dsa_switch_tree *dst = ds->dst; | |
101 | struct dsa_chip_data *cd = ds->cd; | |
102 | bool valid_name_found = false; | |
103 | int index = ds->index; | |
104 | int i, ret; | |
105 | ||
106 | /* | |
107 | * Validate supplied switch configuration. | |
108 | */ | |
109 | for (i = 0; i < ds->num_ports; i++) { | |
110 | char *name; | |
111 | ||
112 | name = cd->port_names[i]; | |
113 | if (name == NULL) | |
114 | continue; | |
115 | ||
116 | if (!strcmp(name, "cpu")) { | |
8b0d3ea5 | 117 | if (dst->cpu_dp) { |
6d3c8c0d | 118 | netdev_err(master, |
a6a71f19 VD |
119 | "multiple cpu ports?!\n"); |
120 | return -EINVAL; | |
121 | } | |
8b0d3ea5 | 122 | dst->cpu_dp = &ds->ports[i]; |
f8b8b1cd | 123 | dst->cpu_dp->master = master; |
a6a71f19 VD |
124 | ds->cpu_port_mask |= 1 << i; |
125 | } else if (!strcmp(name, "dsa")) { | |
126 | ds->dsa_port_mask |= 1 << i; | |
127 | } else { | |
128 | ds->enabled_port_mask |= 1 << i; | |
129 | } | |
130 | valid_name_found = true; | |
131 | } | |
132 | ||
133 | if (!valid_name_found && i == ds->num_ports) | |
134 | return -EINVAL; | |
135 | ||
136 | /* Make the built-in MII bus mask match the number of ports, | |
137 | * switch drivers can override this later | |
138 | */ | |
139 | ds->phys_mii_mask = ds->enabled_port_mask; | |
140 | ||
141 | /* | |
142 | * If the CPU connects to this switch, set the switch tree | |
143 | * tagging protocol to the preferred tagging format of this | |
144 | * switch. | |
145 | */ | |
8b0d3ea5 | 146 | if (dst->cpu_dp->ds == ds) { |
62fc9587 | 147 | const struct dsa_device_ops *tag_ops; |
a6a71f19 VD |
148 | enum dsa_tag_protocol tag_protocol; |
149 | ||
150 | tag_protocol = ops->get_tag_protocol(ds); | |
62fc9587 VD |
151 | tag_ops = dsa_resolve_tag_protocol(tag_protocol); |
152 | if (IS_ERR(tag_ops)) | |
153 | return PTR_ERR(tag_ops); | |
a6a71f19 | 154 | |
15240248 | 155 | dst->cpu_dp->tag_ops = tag_ops; |
3e41f93b VD |
156 | |
157 | /* Few copies for faster access in master receive hot path */ | |
158 | dst->cpu_dp->rcv = dst->cpu_dp->tag_ops->rcv; | |
3e41f93b | 159 | dst->cpu_dp->dst = dst; |
a6a71f19 VD |
160 | } |
161 | ||
162 | memcpy(ds->rtable, cd->rtable, sizeof(ds->rtable)); | |
163 | ||
164 | /* | |
165 | * Do basic register setup. | |
166 | */ | |
167 | ret = ops->setup(ds); | |
168 | if (ret < 0) | |
169 | return ret; | |
170 | ||
171 | ret = dsa_switch_register_notifier(ds); | |
172 | if (ret) | |
173 | return ret; | |
174 | ||
a6a71f19 | 175 | if (!ds->slave_mii_bus && ops->phy_read) { |
206e41fe | 176 | ds->slave_mii_bus = devm_mdiobus_alloc(ds->dev); |
a6a71f19 VD |
177 | if (!ds->slave_mii_bus) |
178 | return -ENOMEM; | |
179 | dsa_slave_mii_bus_init(ds); | |
180 | ||
181 | ret = mdiobus_register(ds->slave_mii_bus); | |
182 | if (ret < 0) | |
183 | return ret; | |
184 | } | |
185 | ||
186 | /* | |
187 | * Create network devices for physical switch ports. | |
188 | */ | |
189 | for (i = 0; i < ds->num_ports; i++) { | |
190 | ds->ports[i].dn = cd->port_dn[i]; | |
06d4d450 | 191 | ds->ports[i].cpu_dp = dst->cpu_dp; |
a6a71f19 VD |
192 | |
193 | if (!(ds->enabled_port_mask & (1 << i))) | |
194 | continue; | |
195 | ||
4cfbf09c | 196 | ret = dsa_slave_create(&ds->ports[i], cd->port_names[i]); |
a6a71f19 | 197 | if (ret < 0) |
6d3c8c0d | 198 | netdev_err(master, "[%d]: can't create dsa slave device for port %d(%s): %d\n", |
a6a71f19 VD |
199 | index, i, cd->port_names[i], ret); |
200 | } | |
201 | ||
202 | /* Perform configuration of the CPU and DSA ports */ | |
206e41fe | 203 | ret = dsa_cpu_dsa_setups(ds); |
a6a71f19 | 204 | if (ret < 0) |
6d3c8c0d | 205 | netdev_err(master, "[%d] : can't configure CPU and DSA ports\n", |
a6a71f19 VD |
206 | index); |
207 | ||
a6a71f19 VD |
208 | return 0; |
209 | } | |
210 | ||
211 | static struct dsa_switch * | |
06d4d450 FF |
212 | dsa_switch_setup(struct dsa_switch_tree *dst, struct net_device *master, |
213 | int index, struct device *parent, struct device *host_dev) | |
a6a71f19 VD |
214 | { |
215 | struct dsa_chip_data *cd = dst->pd->chip + index; | |
216 | const struct dsa_switch_ops *ops; | |
217 | struct dsa_switch *ds; | |
218 | int ret; | |
219 | const char *name; | |
220 | void *priv; | |
221 | ||
222 | /* | |
223 | * Probe for switch model. | |
224 | */ | |
225 | ops = dsa_switch_probe(parent, host_dev, cd->sw_addr, &name, &priv); | |
226 | if (!ops) { | |
6d3c8c0d | 227 | netdev_err(master, "[%d]: could not detect attached switch\n", |
a6a71f19 VD |
228 | index); |
229 | return ERR_PTR(-EINVAL); | |
230 | } | |
6d3c8c0d | 231 | netdev_info(master, "[%d]: detected a %s switch\n", |
a6a71f19 VD |
232 | index, name); |
233 | ||
234 | ||
235 | /* | |
236 | * Allocate and initialise switch state. | |
237 | */ | |
238 | ds = dsa_switch_alloc(parent, DSA_MAX_PORTS); | |
239 | if (!ds) | |
240 | return ERR_PTR(-ENOMEM); | |
241 | ||
242 | ds->dst = dst; | |
243 | ds->index = index; | |
244 | ds->cd = cd; | |
245 | ds->ops = ops; | |
246 | ds->priv = priv; | |
247 | ||
206e41fe | 248 | ret = dsa_switch_setup_one(ds, master); |
a6a71f19 VD |
249 | if (ret) |
250 | return ERR_PTR(ret); | |
251 | ||
252 | return ds; | |
253 | } | |
254 | ||
255 | static void dsa_switch_destroy(struct dsa_switch *ds) | |
256 | { | |
257 | int port; | |
258 | ||
259 | /* Destroy network devices for physical switch ports. */ | |
260 | for (port = 0; port < ds->num_ports; port++) { | |
261 | if (!(ds->enabled_port_mask & (1 << port))) | |
262 | continue; | |
263 | ||
f8b8b1cd | 264 | if (!ds->ports[port].slave) |
a6a71f19 VD |
265 | continue; |
266 | ||
f8b8b1cd | 267 | dsa_slave_destroy(ds->ports[port].slave); |
a6a71f19 VD |
268 | } |
269 | ||
270 | /* Disable configuration of the CPU and DSA ports */ | |
271 | for (port = 0; port < ds->num_ports; port++) { | |
272 | if (!(dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port))) | |
273 | continue; | |
274 | dsa_cpu_dsa_destroy(&ds->ports[port]); | |
a6a71f19 VD |
275 | } |
276 | ||
277 | if (ds->slave_mii_bus && ds->ops->phy_read) | |
278 | mdiobus_unregister(ds->slave_mii_bus); | |
279 | ||
280 | dsa_switch_unregister_notifier(ds); | |
281 | } | |
282 | ||
a6a71f19 VD |
283 | /* platform driver init and cleanup *****************************************/ |
284 | static int dev_is_class(struct device *dev, void *class) | |
285 | { | |
286 | if (dev->class != NULL && !strcmp(dev->class->name, class)) | |
287 | return 1; | |
288 | ||
289 | return 0; | |
290 | } | |
291 | ||
292 | static struct device *dev_find_class(struct device *parent, char *class) | |
293 | { | |
294 | if (dev_is_class(parent, class)) { | |
295 | get_device(parent); | |
296 | return parent; | |
297 | } | |
298 | ||
299 | return device_find_child(parent, class, dev_is_class); | |
300 | } | |
301 | ||
302 | struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev) | |
303 | { | |
304 | struct device *d; | |
305 | ||
306 | d = dev_find_class(dev, "mdio_bus"); | |
307 | if (d != NULL) { | |
308 | struct mii_bus *bus; | |
309 | ||
310 | bus = to_mii_bus(d); | |
311 | put_device(d); | |
312 | ||
313 | return bus; | |
314 | } | |
315 | ||
316 | return NULL; | |
317 | } | |
318 | EXPORT_SYMBOL_GPL(dsa_host_dev_to_mii_bus); | |
319 | ||
320 | #ifdef CONFIG_OF | |
321 | static int dsa_of_setup_routing_table(struct dsa_platform_data *pd, | |
322 | struct dsa_chip_data *cd, | |
323 | int chip_index, int port_index, | |
324 | struct device_node *link) | |
325 | { | |
326 | const __be32 *reg; | |
327 | int link_sw_addr; | |
328 | struct device_node *parent_sw; | |
329 | int len; | |
330 | ||
331 | parent_sw = of_get_parent(link); | |
332 | if (!parent_sw) | |
333 | return -EINVAL; | |
334 | ||
335 | reg = of_get_property(parent_sw, "reg", &len); | |
336 | if (!reg || (len != sizeof(*reg) * 2)) | |
337 | return -EINVAL; | |
338 | ||
339 | /* | |
340 | * Get the destination switch number from the second field of its 'reg' | |
341 | * property, i.e. for "reg = <0x19 1>" sw_addr is '1'. | |
342 | */ | |
343 | link_sw_addr = be32_to_cpup(reg + 1); | |
344 | ||
345 | if (link_sw_addr >= pd->nr_chips) | |
346 | return -EINVAL; | |
347 | ||
348 | cd->rtable[link_sw_addr] = port_index; | |
349 | ||
350 | return 0; | |
351 | } | |
352 | ||
353 | static int dsa_of_probe_links(struct dsa_platform_data *pd, | |
354 | struct dsa_chip_data *cd, | |
355 | int chip_index, int port_index, | |
356 | struct device_node *port, | |
357 | const char *port_name) | |
358 | { | |
359 | struct device_node *link; | |
360 | int link_index; | |
361 | int ret; | |
362 | ||
363 | for (link_index = 0;; link_index++) { | |
364 | link = of_parse_phandle(port, "link", link_index); | |
365 | if (!link) | |
366 | break; | |
367 | ||
368 | if (!strcmp(port_name, "dsa") && pd->nr_chips > 1) { | |
369 | ret = dsa_of_setup_routing_table(pd, cd, chip_index, | |
370 | port_index, link); | |
371 | if (ret) | |
372 | return ret; | |
373 | } | |
374 | } | |
375 | return 0; | |
376 | } | |
377 | ||
378 | static void dsa_of_free_platform_data(struct dsa_platform_data *pd) | |
379 | { | |
380 | int i; | |
381 | int port_index; | |
382 | ||
383 | for (i = 0; i < pd->nr_chips; i++) { | |
384 | port_index = 0; | |
385 | while (port_index < DSA_MAX_PORTS) { | |
386 | kfree(pd->chip[i].port_names[port_index]); | |
387 | port_index++; | |
388 | } | |
389 | ||
390 | /* Drop our reference to the MDIO bus device */ | |
391 | if (pd->chip[i].host_dev) | |
392 | put_device(pd->chip[i].host_dev); | |
393 | } | |
394 | kfree(pd->chip); | |
395 | } | |
396 | ||
397 | static int dsa_of_probe(struct device *dev) | |
398 | { | |
399 | struct device_node *np = dev->of_node; | |
400 | struct device_node *child, *mdio, *ethernet, *port; | |
401 | struct mii_bus *mdio_bus, *mdio_bus_switch; | |
402 | struct net_device *ethernet_dev; | |
403 | struct dsa_platform_data *pd; | |
404 | struct dsa_chip_data *cd; | |
405 | const char *port_name; | |
406 | int chip_index, port_index; | |
407 | const unsigned int *sw_addr, *port_reg; | |
408 | u32 eeprom_len; | |
409 | int ret; | |
410 | ||
411 | mdio = of_parse_phandle(np, "dsa,mii-bus", 0); | |
412 | if (!mdio) | |
413 | return -EINVAL; | |
414 | ||
415 | mdio_bus = of_mdio_find_bus(mdio); | |
416 | if (!mdio_bus) | |
417 | return -EPROBE_DEFER; | |
418 | ||
419 | ethernet = of_parse_phandle(np, "dsa,ethernet", 0); | |
420 | if (!ethernet) { | |
421 | ret = -EINVAL; | |
422 | goto out_put_mdio; | |
423 | } | |
424 | ||
425 | ethernet_dev = of_find_net_device_by_node(ethernet); | |
426 | if (!ethernet_dev) { | |
427 | ret = -EPROBE_DEFER; | |
428 | goto out_put_mdio; | |
429 | } | |
430 | ||
431 | pd = kzalloc(sizeof(*pd), GFP_KERNEL); | |
432 | if (!pd) { | |
433 | ret = -ENOMEM; | |
434 | goto out_put_ethernet; | |
435 | } | |
436 | ||
437 | dev->platform_data = pd; | |
438 | pd->of_netdev = ethernet_dev; | |
439 | pd->nr_chips = of_get_available_child_count(np); | |
440 | if (pd->nr_chips > DSA_MAX_SWITCHES) | |
441 | pd->nr_chips = DSA_MAX_SWITCHES; | |
442 | ||
443 | pd->chip = kcalloc(pd->nr_chips, sizeof(struct dsa_chip_data), | |
444 | GFP_KERNEL); | |
445 | if (!pd->chip) { | |
446 | ret = -ENOMEM; | |
447 | goto out_free; | |
448 | } | |
449 | ||
450 | chip_index = -1; | |
451 | for_each_available_child_of_node(np, child) { | |
452 | int i; | |
453 | ||
454 | chip_index++; | |
455 | cd = &pd->chip[chip_index]; | |
456 | ||
457 | cd->of_node = child; | |
458 | ||
459 | /* Initialize the routing table */ | |
460 | for (i = 0; i < DSA_MAX_SWITCHES; ++i) | |
461 | cd->rtable[i] = DSA_RTABLE_NONE; | |
462 | ||
463 | /* When assigning the host device, increment its refcount */ | |
464 | cd->host_dev = get_device(&mdio_bus->dev); | |
465 | ||
466 | sw_addr = of_get_property(child, "reg", NULL); | |
467 | if (!sw_addr) | |
468 | continue; | |
469 | ||
470 | cd->sw_addr = be32_to_cpup(sw_addr); | |
471 | if (cd->sw_addr >= PHY_MAX_ADDR) | |
472 | continue; | |
473 | ||
474 | if (!of_property_read_u32(child, "eeprom-length", &eeprom_len)) | |
475 | cd->eeprom_len = eeprom_len; | |
476 | ||
477 | mdio = of_parse_phandle(child, "mii-bus", 0); | |
478 | if (mdio) { | |
479 | mdio_bus_switch = of_mdio_find_bus(mdio); | |
480 | if (!mdio_bus_switch) { | |
481 | ret = -EPROBE_DEFER; | |
482 | goto out_free_chip; | |
483 | } | |
484 | ||
485 | /* Drop the mdio_bus device ref, replacing the host | |
486 | * device with the mdio_bus_switch device, keeping | |
487 | * the refcount from of_mdio_find_bus() above. | |
488 | */ | |
489 | put_device(cd->host_dev); | |
490 | cd->host_dev = &mdio_bus_switch->dev; | |
491 | } | |
492 | ||
493 | for_each_available_child_of_node(child, port) { | |
494 | port_reg = of_get_property(port, "reg", NULL); | |
495 | if (!port_reg) | |
496 | continue; | |
497 | ||
498 | port_index = be32_to_cpup(port_reg); | |
499 | if (port_index >= DSA_MAX_PORTS) | |
500 | break; | |
501 | ||
502 | port_name = of_get_property(port, "label", NULL); | |
503 | if (!port_name) | |
504 | continue; | |
505 | ||
506 | cd->port_dn[port_index] = port; | |
507 | ||
508 | cd->port_names[port_index] = kstrdup(port_name, | |
509 | GFP_KERNEL); | |
510 | if (!cd->port_names[port_index]) { | |
511 | ret = -ENOMEM; | |
512 | goto out_free_chip; | |
513 | } | |
514 | ||
515 | ret = dsa_of_probe_links(pd, cd, chip_index, | |
516 | port_index, port, port_name); | |
517 | if (ret) | |
518 | goto out_free_chip; | |
519 | ||
520 | } | |
521 | } | |
522 | ||
523 | /* The individual chips hold their own refcount on the mdio bus, | |
524 | * so drop ours */ | |
525 | put_device(&mdio_bus->dev); | |
526 | ||
527 | return 0; | |
528 | ||
529 | out_free_chip: | |
530 | dsa_of_free_platform_data(pd); | |
531 | out_free: | |
532 | kfree(pd); | |
533 | dev->platform_data = NULL; | |
534 | out_put_ethernet: | |
535 | put_device(ðernet_dev->dev); | |
536 | out_put_mdio: | |
537 | put_device(&mdio_bus->dev); | |
538 | return ret; | |
539 | } | |
540 | ||
541 | static void dsa_of_remove(struct device *dev) | |
542 | { | |
543 | struct dsa_platform_data *pd = dev->platform_data; | |
544 | ||
545 | if (!dev->of_node) | |
546 | return; | |
547 | ||
548 | dsa_of_free_platform_data(pd); | |
549 | put_device(&pd->of_netdev->dev); | |
550 | kfree(pd); | |
551 | } | |
552 | #else | |
553 | static inline int dsa_of_probe(struct device *dev) | |
554 | { | |
555 | return 0; | |
556 | } | |
557 | ||
558 | static inline void dsa_of_remove(struct device *dev) | |
559 | { | |
560 | } | |
561 | #endif | |
562 | ||
563 | static int dsa_setup_dst(struct dsa_switch_tree *dst, struct net_device *dev, | |
564 | struct device *parent, struct dsa_platform_data *pd) | |
565 | { | |
566 | int i; | |
567 | unsigned configured = 0; | |
568 | ||
569 | dst->pd = pd; | |
a6a71f19 VD |
570 | |
571 | for (i = 0; i < pd->nr_chips; i++) { | |
572 | struct dsa_switch *ds; | |
573 | ||
06d4d450 | 574 | ds = dsa_switch_setup(dst, dev, i, parent, pd->chip[i].host_dev); |
a6a71f19 VD |
575 | if (IS_ERR(ds)) { |
576 | netdev_err(dev, "[%d]: couldn't create dsa switch instance (error %ld)\n", | |
577 | i, PTR_ERR(ds)); | |
578 | continue; | |
579 | } | |
580 | ||
581 | dst->ds[i] = ds; | |
582 | ||
583 | ++configured; | |
584 | } | |
585 | ||
586 | /* | |
587 | * If no switch was found, exit cleanly | |
588 | */ | |
589 | if (!configured) | |
590 | return -EPROBE_DEFER; | |
591 | ||
592 | /* | |
593 | * If we use a tagging format that doesn't have an ethertype | |
594 | * field, make sure that all packets from this point on get | |
595 | * sent to the tag format's receive function. | |
596 | */ | |
597 | wmb(); | |
2f657a60 | 598 | dev->dsa_ptr = dst->cpu_dp; |
a6a71f19 | 599 | |
f8b8b1cd | 600 | return dsa_master_ethtool_setup(dst->cpu_dp->master); |
a6a71f19 VD |
601 | } |
602 | ||
603 | static int dsa_probe(struct platform_device *pdev) | |
604 | { | |
605 | struct dsa_platform_data *pd = pdev->dev.platform_data; | |
606 | struct net_device *dev; | |
607 | struct dsa_switch_tree *dst; | |
608 | int ret; | |
609 | ||
610 | if (pdev->dev.of_node) { | |
611 | ret = dsa_of_probe(&pdev->dev); | |
612 | if (ret) | |
613 | return ret; | |
614 | ||
615 | pd = pdev->dev.platform_data; | |
616 | } | |
617 | ||
618 | if (pd == NULL || (pd->netdev == NULL && pd->of_netdev == NULL)) | |
619 | return -EINVAL; | |
620 | ||
621 | if (pd->of_netdev) { | |
622 | dev = pd->of_netdev; | |
623 | dev_hold(dev); | |
624 | } else { | |
625 | dev = dsa_dev_to_net_device(pd->netdev); | |
626 | } | |
627 | if (dev == NULL) { | |
628 | ret = -EPROBE_DEFER; | |
629 | goto out; | |
630 | } | |
631 | ||
632 | if (dev->dsa_ptr != NULL) { | |
633 | dev_put(dev); | |
634 | ret = -EEXIST; | |
635 | goto out; | |
636 | } | |
637 | ||
638 | dst = devm_kzalloc(&pdev->dev, sizeof(*dst), GFP_KERNEL); | |
639 | if (dst == NULL) { | |
640 | dev_put(dev); | |
641 | ret = -ENOMEM; | |
642 | goto out; | |
643 | } | |
644 | ||
645 | platform_set_drvdata(pdev, dst); | |
646 | ||
647 | ret = dsa_setup_dst(dst, dev, &pdev->dev, pd); | |
648 | if (ret) { | |
649 | dev_put(dev); | |
650 | goto out; | |
651 | } | |
652 | ||
653 | return 0; | |
654 | ||
655 | out: | |
656 | dsa_of_remove(&pdev->dev); | |
657 | ||
658 | return ret; | |
659 | } | |
660 | ||
661 | static void dsa_remove_dst(struct dsa_switch_tree *dst) | |
662 | { | |
663 | int i; | |
664 | ||
f8b8b1cd | 665 | dsa_master_ethtool_restore(dst->cpu_dp->master); |
1943563d | 666 | |
f8b8b1cd | 667 | dst->cpu_dp->master->dsa_ptr = NULL; |
a6a71f19 VD |
668 | |
669 | /* If we used a tagging format that doesn't have an ethertype | |
670 | * field, make sure that all packets from this point get sent | |
671 | * without the tag and go through the regular receive path. | |
672 | */ | |
673 | wmb(); | |
674 | ||
675 | for (i = 0; i < dst->pd->nr_chips; i++) { | |
676 | struct dsa_switch *ds = dst->ds[i]; | |
677 | ||
678 | if (ds) | |
679 | dsa_switch_destroy(ds); | |
680 | } | |
681 | ||
f8b8b1cd | 682 | dev_put(dst->cpu_dp->master); |
a6a71f19 VD |
683 | } |
684 | ||
685 | static int dsa_remove(struct platform_device *pdev) | |
686 | { | |
687 | struct dsa_switch_tree *dst = platform_get_drvdata(pdev); | |
688 | ||
689 | dsa_remove_dst(dst); | |
690 | dsa_of_remove(&pdev->dev); | |
691 | ||
692 | return 0; | |
693 | } | |
694 | ||
695 | static void dsa_shutdown(struct platform_device *pdev) | |
696 | { | |
697 | } | |
698 | ||
699 | #ifdef CONFIG_PM_SLEEP | |
700 | static int dsa_suspend(struct device *d) | |
701 | { | |
702 | struct platform_device *pdev = to_platform_device(d); | |
703 | struct dsa_switch_tree *dst = platform_get_drvdata(pdev); | |
704 | int i, ret = 0; | |
705 | ||
706 | for (i = 0; i < dst->pd->nr_chips; i++) { | |
707 | struct dsa_switch *ds = dst->ds[i]; | |
708 | ||
709 | if (ds != NULL) | |
710 | ret = dsa_switch_suspend(ds); | |
711 | } | |
712 | ||
713 | return ret; | |
714 | } | |
715 | ||
716 | static int dsa_resume(struct device *d) | |
717 | { | |
718 | struct platform_device *pdev = to_platform_device(d); | |
719 | struct dsa_switch_tree *dst = platform_get_drvdata(pdev); | |
720 | int i, ret = 0; | |
721 | ||
722 | for (i = 0; i < dst->pd->nr_chips; i++) { | |
723 | struct dsa_switch *ds = dst->ds[i]; | |
724 | ||
725 | if (ds != NULL) | |
726 | ret = dsa_switch_resume(ds); | |
727 | } | |
728 | ||
729 | return ret; | |
730 | } | |
731 | #endif | |
732 | ||
37b8da1a AS |
733 | /* legacy way, bypassing the bridge *****************************************/ |
734 | int dsa_legacy_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], | |
735 | struct net_device *dev, | |
736 | const unsigned char *addr, u16 vid, | |
737 | u16 flags) | |
738 | { | |
d945097b | 739 | struct dsa_port *dp = dsa_slave_to_port(dev); |
37b8da1a AS |
740 | |
741 | return dsa_port_fdb_add(dp, addr, vid); | |
742 | } | |
743 | ||
744 | int dsa_legacy_fdb_del(struct ndmsg *ndm, struct nlattr *tb[], | |
745 | struct net_device *dev, | |
746 | const unsigned char *addr, u16 vid) | |
747 | { | |
d945097b | 748 | struct dsa_port *dp = dsa_slave_to_port(dev); |
37b8da1a AS |
749 | |
750 | return dsa_port_fdb_del(dp, addr, vid); | |
751 | } | |
752 | ||
a6a71f19 VD |
753 | static SIMPLE_DEV_PM_OPS(dsa_pm_ops, dsa_suspend, dsa_resume); |
754 | ||
755 | static const struct of_device_id dsa_of_match_table[] = { | |
756 | { .compatible = "marvell,dsa", }, | |
757 | {} | |
758 | }; | |
759 | MODULE_DEVICE_TABLE(of, dsa_of_match_table); | |
760 | ||
761 | static struct platform_driver dsa_driver = { | |
762 | .probe = dsa_probe, | |
763 | .remove = dsa_remove, | |
764 | .shutdown = dsa_shutdown, | |
765 | .driver = { | |
766 | .name = "dsa", | |
767 | .of_match_table = dsa_of_match_table, | |
768 | .pm = &dsa_pm_ops, | |
769 | }, | |
770 | }; | |
771 | ||
772 | int dsa_legacy_register(void) | |
773 | { | |
774 | return platform_driver_register(&dsa_driver); | |
775 | } | |
776 | ||
777 | void dsa_legacy_unregister(void) | |
778 | { | |
779 | platform_driver_unregister(&dsa_driver); | |
780 | } |