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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 | ||
57ab1ca2 | 89 | ret = dsa_port_fixed_link_register_of(&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; | |
057cad2c | 104 | struct dsa_port *dp; |
a6a71f19 VD |
105 | int i, ret; |
106 | ||
107 | /* | |
108 | * Validate supplied switch configuration. | |
109 | */ | |
110 | for (i = 0; i < ds->num_ports; i++) { | |
111 | char *name; | |
112 | ||
057cad2c VD |
113 | dp = &ds->ports[i]; |
114 | ||
a6a71f19 VD |
115 | name = cd->port_names[i]; |
116 | if (name == NULL) | |
117 | continue; | |
118 | ||
119 | if (!strcmp(name, "cpu")) { | |
8b0d3ea5 | 120 | if (dst->cpu_dp) { |
6d3c8c0d | 121 | netdev_err(master, |
a6a71f19 VD |
122 | "multiple cpu ports?!\n"); |
123 | return -EINVAL; | |
124 | } | |
8b0d3ea5 | 125 | dst->cpu_dp = &ds->ports[i]; |
f8b8b1cd | 126 | dst->cpu_dp->master = master; |
057cad2c | 127 | dp->type = DSA_PORT_TYPE_CPU; |
a6a71f19 | 128 | } else if (!strcmp(name, "dsa")) { |
057cad2c | 129 | dp->type = DSA_PORT_TYPE_DSA; |
a6a71f19 | 130 | } else { |
057cad2c | 131 | dp->type = DSA_PORT_TYPE_USER; |
a6a71f19 VD |
132 | } |
133 | valid_name_found = true; | |
134 | } | |
135 | ||
136 | if (!valid_name_found && i == ds->num_ports) | |
137 | return -EINVAL; | |
138 | ||
139 | /* Make the built-in MII bus mask match the number of ports, | |
140 | * switch drivers can override this later | |
141 | */ | |
02bc6e54 | 142 | ds->phys_mii_mask |= dsa_user_ports(ds); |
a6a71f19 VD |
143 | |
144 | /* | |
145 | * If the CPU connects to this switch, set the switch tree | |
146 | * tagging protocol to the preferred tagging format of this | |
147 | * switch. | |
148 | */ | |
8b0d3ea5 | 149 | if (dst->cpu_dp->ds == ds) { |
62fc9587 | 150 | const struct dsa_device_ops *tag_ops; |
a6a71f19 VD |
151 | enum dsa_tag_protocol tag_protocol; |
152 | ||
153 | tag_protocol = ops->get_tag_protocol(ds); | |
62fc9587 VD |
154 | tag_ops = dsa_resolve_tag_protocol(tag_protocol); |
155 | if (IS_ERR(tag_ops)) | |
156 | return PTR_ERR(tag_ops); | |
a6a71f19 | 157 | |
15240248 | 158 | dst->cpu_dp->tag_ops = tag_ops; |
3e41f93b VD |
159 | |
160 | /* Few copies for faster access in master receive hot path */ | |
161 | dst->cpu_dp->rcv = dst->cpu_dp->tag_ops->rcv; | |
3e41f93b | 162 | dst->cpu_dp->dst = dst; |
a6a71f19 VD |
163 | } |
164 | ||
165 | memcpy(ds->rtable, cd->rtable, sizeof(ds->rtable)); | |
166 | ||
167 | /* | |
168 | * Do basic register setup. | |
169 | */ | |
170 | ret = ops->setup(ds); | |
171 | if (ret < 0) | |
172 | return ret; | |
173 | ||
174 | ret = dsa_switch_register_notifier(ds); | |
175 | if (ret) | |
176 | return ret; | |
177 | ||
a6a71f19 | 178 | if (!ds->slave_mii_bus && ops->phy_read) { |
206e41fe | 179 | ds->slave_mii_bus = devm_mdiobus_alloc(ds->dev); |
a6a71f19 VD |
180 | if (!ds->slave_mii_bus) |
181 | return -ENOMEM; | |
182 | dsa_slave_mii_bus_init(ds); | |
183 | ||
184 | ret = mdiobus_register(ds->slave_mii_bus); | |
185 | if (ret < 0) | |
186 | return ret; | |
187 | } | |
188 | ||
189 | /* | |
190 | * Create network devices for physical switch ports. | |
191 | */ | |
192 | for (i = 0; i < ds->num_ports; i++) { | |
193 | ds->ports[i].dn = cd->port_dn[i]; | |
06d4d450 | 194 | ds->ports[i].cpu_dp = dst->cpu_dp; |
a6a71f19 | 195 | |
4a5b85ff | 196 | if (dsa_is_user_port(ds, i)) |
a6a71f19 VD |
197 | continue; |
198 | ||
4cfbf09c | 199 | ret = dsa_slave_create(&ds->ports[i], cd->port_names[i]); |
a6a71f19 | 200 | if (ret < 0) |
6d3c8c0d | 201 | netdev_err(master, "[%d]: can't create dsa slave device for port %d(%s): %d\n", |
a6a71f19 VD |
202 | index, i, cd->port_names[i], ret); |
203 | } | |
204 | ||
205 | /* Perform configuration of the CPU and DSA ports */ | |
206e41fe | 206 | ret = dsa_cpu_dsa_setups(ds); |
a6a71f19 | 207 | if (ret < 0) |
6d3c8c0d | 208 | netdev_err(master, "[%d] : can't configure CPU and DSA ports\n", |
a6a71f19 VD |
209 | index); |
210 | ||
a6a71f19 VD |
211 | return 0; |
212 | } | |
213 | ||
214 | static struct dsa_switch * | |
06d4d450 FF |
215 | dsa_switch_setup(struct dsa_switch_tree *dst, struct net_device *master, |
216 | int index, struct device *parent, struct device *host_dev) | |
a6a71f19 VD |
217 | { |
218 | struct dsa_chip_data *cd = dst->pd->chip + index; | |
219 | const struct dsa_switch_ops *ops; | |
220 | struct dsa_switch *ds; | |
221 | int ret; | |
222 | const char *name; | |
223 | void *priv; | |
224 | ||
225 | /* | |
226 | * Probe for switch model. | |
227 | */ | |
228 | ops = dsa_switch_probe(parent, host_dev, cd->sw_addr, &name, &priv); | |
229 | if (!ops) { | |
6d3c8c0d | 230 | netdev_err(master, "[%d]: could not detect attached switch\n", |
a6a71f19 VD |
231 | index); |
232 | return ERR_PTR(-EINVAL); | |
233 | } | |
6d3c8c0d | 234 | netdev_info(master, "[%d]: detected a %s switch\n", |
a6a71f19 VD |
235 | index, name); |
236 | ||
237 | ||
238 | /* | |
239 | * Allocate and initialise switch state. | |
240 | */ | |
241 | ds = dsa_switch_alloc(parent, DSA_MAX_PORTS); | |
242 | if (!ds) | |
243 | return ERR_PTR(-ENOMEM); | |
244 | ||
245 | ds->dst = dst; | |
246 | ds->index = index; | |
247 | ds->cd = cd; | |
248 | ds->ops = ops; | |
249 | ds->priv = priv; | |
250 | ||
206e41fe | 251 | ret = dsa_switch_setup_one(ds, master); |
a6a71f19 VD |
252 | if (ret) |
253 | return ERR_PTR(ret); | |
254 | ||
255 | return ds; | |
256 | } | |
257 | ||
258 | static void dsa_switch_destroy(struct dsa_switch *ds) | |
259 | { | |
260 | int port; | |
261 | ||
262 | /* Destroy network devices for physical switch ports. */ | |
263 | for (port = 0; port < ds->num_ports; port++) { | |
4a5b85ff | 264 | if (!dsa_is_user_port(ds, port)) |
a6a71f19 VD |
265 | continue; |
266 | ||
f8b8b1cd | 267 | if (!ds->ports[port].slave) |
a6a71f19 VD |
268 | continue; |
269 | ||
f8b8b1cd | 270 | dsa_slave_destroy(ds->ports[port].slave); |
a6a71f19 VD |
271 | } |
272 | ||
273 | /* Disable configuration of the CPU and DSA ports */ | |
274 | for (port = 0; port < ds->num_ports; port++) { | |
275 | if (!(dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port))) | |
276 | continue; | |
57ab1ca2 | 277 | dsa_port_fixed_link_unregister_of(&ds->ports[port]); |
a6a71f19 VD |
278 | } |
279 | ||
280 | if (ds->slave_mii_bus && ds->ops->phy_read) | |
281 | mdiobus_unregister(ds->slave_mii_bus); | |
282 | ||
283 | dsa_switch_unregister_notifier(ds); | |
284 | } | |
285 | ||
a6a71f19 VD |
286 | /* platform driver init and cleanup *****************************************/ |
287 | static int dev_is_class(struct device *dev, void *class) | |
288 | { | |
289 | if (dev->class != NULL && !strcmp(dev->class->name, class)) | |
290 | return 1; | |
291 | ||
292 | return 0; | |
293 | } | |
294 | ||
295 | static struct device *dev_find_class(struct device *parent, char *class) | |
296 | { | |
297 | if (dev_is_class(parent, class)) { | |
298 | get_device(parent); | |
299 | return parent; | |
300 | } | |
301 | ||
302 | return device_find_child(parent, class, dev_is_class); | |
303 | } | |
304 | ||
305 | struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev) | |
306 | { | |
307 | struct device *d; | |
308 | ||
309 | d = dev_find_class(dev, "mdio_bus"); | |
310 | if (d != NULL) { | |
311 | struct mii_bus *bus; | |
312 | ||
313 | bus = to_mii_bus(d); | |
314 | put_device(d); | |
315 | ||
316 | return bus; | |
317 | } | |
318 | ||
319 | return NULL; | |
320 | } | |
321 | EXPORT_SYMBOL_GPL(dsa_host_dev_to_mii_bus); | |
322 | ||
323 | #ifdef CONFIG_OF | |
324 | static int dsa_of_setup_routing_table(struct dsa_platform_data *pd, | |
325 | struct dsa_chip_data *cd, | |
326 | int chip_index, int port_index, | |
327 | struct device_node *link) | |
328 | { | |
329 | const __be32 *reg; | |
330 | int link_sw_addr; | |
331 | struct device_node *parent_sw; | |
332 | int len; | |
333 | ||
334 | parent_sw = of_get_parent(link); | |
335 | if (!parent_sw) | |
336 | return -EINVAL; | |
337 | ||
338 | reg = of_get_property(parent_sw, "reg", &len); | |
339 | if (!reg || (len != sizeof(*reg) * 2)) | |
340 | return -EINVAL; | |
341 | ||
342 | /* | |
343 | * Get the destination switch number from the second field of its 'reg' | |
344 | * property, i.e. for "reg = <0x19 1>" sw_addr is '1'. | |
345 | */ | |
346 | link_sw_addr = be32_to_cpup(reg + 1); | |
347 | ||
348 | if (link_sw_addr >= pd->nr_chips) | |
349 | return -EINVAL; | |
350 | ||
351 | cd->rtable[link_sw_addr] = port_index; | |
352 | ||
353 | return 0; | |
354 | } | |
355 | ||
356 | static int dsa_of_probe_links(struct dsa_platform_data *pd, | |
357 | struct dsa_chip_data *cd, | |
358 | int chip_index, int port_index, | |
359 | struct device_node *port, | |
360 | const char *port_name) | |
361 | { | |
362 | struct device_node *link; | |
363 | int link_index; | |
364 | int ret; | |
365 | ||
366 | for (link_index = 0;; link_index++) { | |
367 | link = of_parse_phandle(port, "link", link_index); | |
368 | if (!link) | |
369 | break; | |
370 | ||
371 | if (!strcmp(port_name, "dsa") && pd->nr_chips > 1) { | |
372 | ret = dsa_of_setup_routing_table(pd, cd, chip_index, | |
373 | port_index, link); | |
374 | if (ret) | |
375 | return ret; | |
376 | } | |
377 | } | |
378 | return 0; | |
379 | } | |
380 | ||
381 | static void dsa_of_free_platform_data(struct dsa_platform_data *pd) | |
382 | { | |
383 | int i; | |
384 | int port_index; | |
385 | ||
386 | for (i = 0; i < pd->nr_chips; i++) { | |
387 | port_index = 0; | |
388 | while (port_index < DSA_MAX_PORTS) { | |
389 | kfree(pd->chip[i].port_names[port_index]); | |
390 | port_index++; | |
391 | } | |
392 | ||
393 | /* Drop our reference to the MDIO bus device */ | |
394 | if (pd->chip[i].host_dev) | |
395 | put_device(pd->chip[i].host_dev); | |
396 | } | |
397 | kfree(pd->chip); | |
398 | } | |
399 | ||
400 | static int dsa_of_probe(struct device *dev) | |
401 | { | |
402 | struct device_node *np = dev->of_node; | |
403 | struct device_node *child, *mdio, *ethernet, *port; | |
404 | struct mii_bus *mdio_bus, *mdio_bus_switch; | |
405 | struct net_device *ethernet_dev; | |
406 | struct dsa_platform_data *pd; | |
407 | struct dsa_chip_data *cd; | |
408 | const char *port_name; | |
409 | int chip_index, port_index; | |
410 | const unsigned int *sw_addr, *port_reg; | |
411 | u32 eeprom_len; | |
412 | int ret; | |
413 | ||
414 | mdio = of_parse_phandle(np, "dsa,mii-bus", 0); | |
415 | if (!mdio) | |
416 | return -EINVAL; | |
417 | ||
418 | mdio_bus = of_mdio_find_bus(mdio); | |
419 | if (!mdio_bus) | |
420 | return -EPROBE_DEFER; | |
421 | ||
422 | ethernet = of_parse_phandle(np, "dsa,ethernet", 0); | |
423 | if (!ethernet) { | |
424 | ret = -EINVAL; | |
425 | goto out_put_mdio; | |
426 | } | |
427 | ||
428 | ethernet_dev = of_find_net_device_by_node(ethernet); | |
429 | if (!ethernet_dev) { | |
430 | ret = -EPROBE_DEFER; | |
431 | goto out_put_mdio; | |
432 | } | |
433 | ||
434 | pd = kzalloc(sizeof(*pd), GFP_KERNEL); | |
435 | if (!pd) { | |
436 | ret = -ENOMEM; | |
437 | goto out_put_ethernet; | |
438 | } | |
439 | ||
440 | dev->platform_data = pd; | |
441 | pd->of_netdev = ethernet_dev; | |
442 | pd->nr_chips = of_get_available_child_count(np); | |
443 | if (pd->nr_chips > DSA_MAX_SWITCHES) | |
444 | pd->nr_chips = DSA_MAX_SWITCHES; | |
445 | ||
446 | pd->chip = kcalloc(pd->nr_chips, sizeof(struct dsa_chip_data), | |
447 | GFP_KERNEL); | |
448 | if (!pd->chip) { | |
449 | ret = -ENOMEM; | |
450 | goto out_free; | |
451 | } | |
452 | ||
453 | chip_index = -1; | |
454 | for_each_available_child_of_node(np, child) { | |
455 | int i; | |
456 | ||
457 | chip_index++; | |
458 | cd = &pd->chip[chip_index]; | |
459 | ||
460 | cd->of_node = child; | |
461 | ||
462 | /* Initialize the routing table */ | |
463 | for (i = 0; i < DSA_MAX_SWITCHES; ++i) | |
464 | cd->rtable[i] = DSA_RTABLE_NONE; | |
465 | ||
466 | /* When assigning the host device, increment its refcount */ | |
467 | cd->host_dev = get_device(&mdio_bus->dev); | |
468 | ||
469 | sw_addr = of_get_property(child, "reg", NULL); | |
470 | if (!sw_addr) | |
471 | continue; | |
472 | ||
473 | cd->sw_addr = be32_to_cpup(sw_addr); | |
474 | if (cd->sw_addr >= PHY_MAX_ADDR) | |
475 | continue; | |
476 | ||
477 | if (!of_property_read_u32(child, "eeprom-length", &eeprom_len)) | |
478 | cd->eeprom_len = eeprom_len; | |
479 | ||
480 | mdio = of_parse_phandle(child, "mii-bus", 0); | |
481 | if (mdio) { | |
482 | mdio_bus_switch = of_mdio_find_bus(mdio); | |
483 | if (!mdio_bus_switch) { | |
484 | ret = -EPROBE_DEFER; | |
485 | goto out_free_chip; | |
486 | } | |
487 | ||
488 | /* Drop the mdio_bus device ref, replacing the host | |
489 | * device with the mdio_bus_switch device, keeping | |
490 | * the refcount from of_mdio_find_bus() above. | |
491 | */ | |
492 | put_device(cd->host_dev); | |
493 | cd->host_dev = &mdio_bus_switch->dev; | |
494 | } | |
495 | ||
496 | for_each_available_child_of_node(child, port) { | |
497 | port_reg = of_get_property(port, "reg", NULL); | |
498 | if (!port_reg) | |
499 | continue; | |
500 | ||
501 | port_index = be32_to_cpup(port_reg); | |
502 | if (port_index >= DSA_MAX_PORTS) | |
503 | break; | |
504 | ||
505 | port_name = of_get_property(port, "label", NULL); | |
506 | if (!port_name) | |
507 | continue; | |
508 | ||
509 | cd->port_dn[port_index] = port; | |
510 | ||
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 | ret = dsa_of_probe_links(pd, cd, chip_index, | |
519 | port_index, port, port_name); | |
520 | if (ret) | |
521 | goto out_free_chip; | |
522 | ||
523 | } | |
524 | } | |
525 | ||
526 | /* The individual chips hold their own refcount on the mdio bus, | |
527 | * so drop ours */ | |
528 | put_device(&mdio_bus->dev); | |
529 | ||
530 | return 0; | |
531 | ||
532 | out_free_chip: | |
533 | dsa_of_free_platform_data(pd); | |
534 | out_free: | |
535 | kfree(pd); | |
536 | dev->platform_data = NULL; | |
537 | out_put_ethernet: | |
538 | put_device(ðernet_dev->dev); | |
539 | out_put_mdio: | |
540 | put_device(&mdio_bus->dev); | |
541 | return ret; | |
542 | } | |
543 | ||
544 | static void dsa_of_remove(struct device *dev) | |
545 | { | |
546 | struct dsa_platform_data *pd = dev->platform_data; | |
547 | ||
548 | if (!dev->of_node) | |
549 | return; | |
550 | ||
551 | dsa_of_free_platform_data(pd); | |
552 | put_device(&pd->of_netdev->dev); | |
553 | kfree(pd); | |
554 | } | |
555 | #else | |
556 | static inline int dsa_of_probe(struct device *dev) | |
557 | { | |
558 | return 0; | |
559 | } | |
560 | ||
561 | static inline void dsa_of_remove(struct device *dev) | |
562 | { | |
563 | } | |
564 | #endif | |
565 | ||
566 | static int dsa_setup_dst(struct dsa_switch_tree *dst, struct net_device *dev, | |
567 | struct device *parent, struct dsa_platform_data *pd) | |
568 | { | |
569 | int i; | |
570 | unsigned configured = 0; | |
571 | ||
572 | dst->pd = pd; | |
a6a71f19 VD |
573 | |
574 | for (i = 0; i < pd->nr_chips; i++) { | |
575 | struct dsa_switch *ds; | |
576 | ||
06d4d450 | 577 | ds = dsa_switch_setup(dst, dev, i, parent, pd->chip[i].host_dev); |
a6a71f19 VD |
578 | if (IS_ERR(ds)) { |
579 | netdev_err(dev, "[%d]: couldn't create dsa switch instance (error %ld)\n", | |
580 | i, PTR_ERR(ds)); | |
581 | continue; | |
582 | } | |
583 | ||
584 | dst->ds[i] = ds; | |
585 | ||
586 | ++configured; | |
587 | } | |
588 | ||
589 | /* | |
590 | * If no switch was found, exit cleanly | |
591 | */ | |
592 | if (!configured) | |
593 | return -EPROBE_DEFER; | |
594 | ||
595 | /* | |
596 | * If we use a tagging format that doesn't have an ethertype | |
597 | * field, make sure that all packets from this point on get | |
598 | * sent to the tag format's receive function. | |
599 | */ | |
600 | wmb(); | |
2f657a60 | 601 | dev->dsa_ptr = dst->cpu_dp; |
a6a71f19 | 602 | |
f8b8b1cd | 603 | return dsa_master_ethtool_setup(dst->cpu_dp->master); |
a6a71f19 VD |
604 | } |
605 | ||
606 | static int dsa_probe(struct platform_device *pdev) | |
607 | { | |
608 | struct dsa_platform_data *pd = pdev->dev.platform_data; | |
609 | struct net_device *dev; | |
610 | struct dsa_switch_tree *dst; | |
611 | int ret; | |
612 | ||
613 | if (pdev->dev.of_node) { | |
614 | ret = dsa_of_probe(&pdev->dev); | |
615 | if (ret) | |
616 | return ret; | |
617 | ||
618 | pd = pdev->dev.platform_data; | |
619 | } | |
620 | ||
621 | if (pd == NULL || (pd->netdev == NULL && pd->of_netdev == NULL)) | |
622 | return -EINVAL; | |
623 | ||
624 | if (pd->of_netdev) { | |
625 | dev = pd->of_netdev; | |
626 | dev_hold(dev); | |
627 | } else { | |
628 | dev = dsa_dev_to_net_device(pd->netdev); | |
629 | } | |
630 | if (dev == NULL) { | |
631 | ret = -EPROBE_DEFER; | |
632 | goto out; | |
633 | } | |
634 | ||
635 | if (dev->dsa_ptr != NULL) { | |
636 | dev_put(dev); | |
637 | ret = -EEXIST; | |
638 | goto out; | |
639 | } | |
640 | ||
641 | dst = devm_kzalloc(&pdev->dev, sizeof(*dst), GFP_KERNEL); | |
642 | if (dst == NULL) { | |
643 | dev_put(dev); | |
644 | ret = -ENOMEM; | |
645 | goto out; | |
646 | } | |
647 | ||
648 | platform_set_drvdata(pdev, dst); | |
649 | ||
650 | ret = dsa_setup_dst(dst, dev, &pdev->dev, pd); | |
651 | if (ret) { | |
652 | dev_put(dev); | |
653 | goto out; | |
654 | } | |
655 | ||
656 | return 0; | |
657 | ||
658 | out: | |
659 | dsa_of_remove(&pdev->dev); | |
660 | ||
661 | return ret; | |
662 | } | |
663 | ||
664 | static void dsa_remove_dst(struct dsa_switch_tree *dst) | |
665 | { | |
666 | int i; | |
667 | ||
f8b8b1cd | 668 | dsa_master_ethtool_restore(dst->cpu_dp->master); |
1943563d | 669 | |
f8b8b1cd | 670 | dst->cpu_dp->master->dsa_ptr = NULL; |
a6a71f19 VD |
671 | |
672 | /* If we used a tagging format that doesn't have an ethertype | |
673 | * field, make sure that all packets from this point get sent | |
674 | * without the tag and go through the regular receive path. | |
675 | */ | |
676 | wmb(); | |
677 | ||
678 | for (i = 0; i < dst->pd->nr_chips; i++) { | |
679 | struct dsa_switch *ds = dst->ds[i]; | |
680 | ||
681 | if (ds) | |
682 | dsa_switch_destroy(ds); | |
683 | } | |
684 | ||
f8b8b1cd | 685 | dev_put(dst->cpu_dp->master); |
a6a71f19 VD |
686 | } |
687 | ||
688 | static int dsa_remove(struct platform_device *pdev) | |
689 | { | |
690 | struct dsa_switch_tree *dst = platform_get_drvdata(pdev); | |
691 | ||
692 | dsa_remove_dst(dst); | |
693 | dsa_of_remove(&pdev->dev); | |
694 | ||
695 | return 0; | |
696 | } | |
697 | ||
698 | static void dsa_shutdown(struct platform_device *pdev) | |
699 | { | |
700 | } | |
701 | ||
702 | #ifdef CONFIG_PM_SLEEP | |
703 | static int dsa_suspend(struct device *d) | |
704 | { | |
705 | struct platform_device *pdev = to_platform_device(d); | |
706 | struct dsa_switch_tree *dst = platform_get_drvdata(pdev); | |
707 | int i, ret = 0; | |
708 | ||
709 | for (i = 0; i < dst->pd->nr_chips; i++) { | |
710 | struct dsa_switch *ds = dst->ds[i]; | |
711 | ||
712 | if (ds != NULL) | |
713 | ret = dsa_switch_suspend(ds); | |
714 | } | |
715 | ||
716 | return ret; | |
717 | } | |
718 | ||
719 | static int dsa_resume(struct device *d) | |
720 | { | |
721 | struct platform_device *pdev = to_platform_device(d); | |
722 | struct dsa_switch_tree *dst = platform_get_drvdata(pdev); | |
723 | int i, ret = 0; | |
724 | ||
725 | for (i = 0; i < dst->pd->nr_chips; i++) { | |
726 | struct dsa_switch *ds = dst->ds[i]; | |
727 | ||
728 | if (ds != NULL) | |
729 | ret = dsa_switch_resume(ds); | |
730 | } | |
731 | ||
732 | return ret; | |
733 | } | |
734 | #endif | |
735 | ||
37b8da1a AS |
736 | /* legacy way, bypassing the bridge *****************************************/ |
737 | int dsa_legacy_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], | |
738 | struct net_device *dev, | |
739 | const unsigned char *addr, u16 vid, | |
740 | u16 flags) | |
741 | { | |
d945097b | 742 | struct dsa_port *dp = dsa_slave_to_port(dev); |
37b8da1a AS |
743 | |
744 | return dsa_port_fdb_add(dp, addr, vid); | |
745 | } | |
746 | ||
747 | int dsa_legacy_fdb_del(struct ndmsg *ndm, struct nlattr *tb[], | |
748 | struct net_device *dev, | |
749 | const unsigned char *addr, u16 vid) | |
750 | { | |
d945097b | 751 | struct dsa_port *dp = dsa_slave_to_port(dev); |
37b8da1a AS |
752 | |
753 | return dsa_port_fdb_del(dp, addr, vid); | |
754 | } | |
755 | ||
a6a71f19 VD |
756 | static SIMPLE_DEV_PM_OPS(dsa_pm_ops, dsa_suspend, dsa_resume); |
757 | ||
758 | static const struct of_device_id dsa_of_match_table[] = { | |
759 | { .compatible = "marvell,dsa", }, | |
760 | {} | |
761 | }; | |
762 | MODULE_DEVICE_TABLE(of, dsa_of_match_table); | |
763 | ||
764 | static struct platform_driver dsa_driver = { | |
765 | .probe = dsa_probe, | |
766 | .remove = dsa_remove, | |
767 | .shutdown = dsa_shutdown, | |
768 | .driver = { | |
769 | .name = "dsa", | |
770 | .of_match_table = dsa_of_match_table, | |
771 | .pm = &dsa_pm_ops, | |
772 | }, | |
773 | }; | |
774 | ||
775 | int dsa_legacy_register(void) | |
776 | { | |
777 | return platform_driver_register(&dsa_driver); | |
778 | } | |
779 | ||
780 | void dsa_legacy_unregister(void) | |
781 | { | |
782 | platform_driver_unregister(&dsa_driver); | |
783 | } |