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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]; |
06d4d450 | 123 | dst->cpu_dp->netdev = 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 | ||
175 | if (ops->set_addr) { | |
6d3c8c0d | 176 | ret = ops->set_addr(ds, master->dev_addr); |
a6a71f19 VD |
177 | if (ret < 0) |
178 | return ret; | |
179 | } | |
180 | ||
181 | if (!ds->slave_mii_bus && ops->phy_read) { | |
206e41fe | 182 | ds->slave_mii_bus = devm_mdiobus_alloc(ds->dev); |
a6a71f19 VD |
183 | if (!ds->slave_mii_bus) |
184 | return -ENOMEM; | |
185 | dsa_slave_mii_bus_init(ds); | |
186 | ||
187 | ret = mdiobus_register(ds->slave_mii_bus); | |
188 | if (ret < 0) | |
189 | return ret; | |
190 | } | |
191 | ||
192 | /* | |
193 | * Create network devices for physical switch ports. | |
194 | */ | |
195 | for (i = 0; i < ds->num_ports; i++) { | |
196 | ds->ports[i].dn = cd->port_dn[i]; | |
06d4d450 | 197 | ds->ports[i].cpu_dp = dst->cpu_dp; |
a6a71f19 VD |
198 | |
199 | if (!(ds->enabled_port_mask & (1 << i))) | |
200 | continue; | |
201 | ||
4cfbf09c | 202 | ret = dsa_slave_create(&ds->ports[i], cd->port_names[i]); |
a6a71f19 | 203 | if (ret < 0) |
6d3c8c0d | 204 | netdev_err(master, "[%d]: can't create dsa slave device for port %d(%s): %d\n", |
a6a71f19 VD |
205 | index, i, cd->port_names[i], ret); |
206 | } | |
207 | ||
208 | /* Perform configuration of the CPU and DSA ports */ | |
206e41fe | 209 | ret = dsa_cpu_dsa_setups(ds); |
a6a71f19 | 210 | if (ret < 0) |
6d3c8c0d | 211 | netdev_err(master, "[%d] : can't configure CPU and DSA ports\n", |
a6a71f19 VD |
212 | index); |
213 | ||
a6a71f19 VD |
214 | return 0; |
215 | } | |
216 | ||
217 | static struct dsa_switch * | |
06d4d450 FF |
218 | dsa_switch_setup(struct dsa_switch_tree *dst, struct net_device *master, |
219 | int index, struct device *parent, struct device *host_dev) | |
a6a71f19 VD |
220 | { |
221 | struct dsa_chip_data *cd = dst->pd->chip + index; | |
222 | const struct dsa_switch_ops *ops; | |
223 | struct dsa_switch *ds; | |
224 | int ret; | |
225 | const char *name; | |
226 | void *priv; | |
227 | ||
228 | /* | |
229 | * Probe for switch model. | |
230 | */ | |
231 | ops = dsa_switch_probe(parent, host_dev, cd->sw_addr, &name, &priv); | |
232 | if (!ops) { | |
6d3c8c0d | 233 | netdev_err(master, "[%d]: could not detect attached switch\n", |
a6a71f19 VD |
234 | index); |
235 | return ERR_PTR(-EINVAL); | |
236 | } | |
6d3c8c0d | 237 | netdev_info(master, "[%d]: detected a %s switch\n", |
a6a71f19 VD |
238 | index, name); |
239 | ||
240 | ||
241 | /* | |
242 | * Allocate and initialise switch state. | |
243 | */ | |
244 | ds = dsa_switch_alloc(parent, DSA_MAX_PORTS); | |
245 | if (!ds) | |
246 | return ERR_PTR(-ENOMEM); | |
247 | ||
248 | ds->dst = dst; | |
249 | ds->index = index; | |
250 | ds->cd = cd; | |
251 | ds->ops = ops; | |
252 | ds->priv = priv; | |
253 | ||
206e41fe | 254 | ret = dsa_switch_setup_one(ds, master); |
a6a71f19 VD |
255 | if (ret) |
256 | return ERR_PTR(ret); | |
257 | ||
258 | return ds; | |
259 | } | |
260 | ||
261 | static void dsa_switch_destroy(struct dsa_switch *ds) | |
262 | { | |
263 | int port; | |
264 | ||
265 | /* Destroy network devices for physical switch ports. */ | |
266 | for (port = 0; port < ds->num_ports; port++) { | |
267 | if (!(ds->enabled_port_mask & (1 << port))) | |
268 | continue; | |
269 | ||
270 | if (!ds->ports[port].netdev) | |
271 | continue; | |
272 | ||
273 | dsa_slave_destroy(ds->ports[port].netdev); | |
274 | } | |
275 | ||
276 | /* Disable configuration of the CPU and DSA ports */ | |
277 | for (port = 0; port < ds->num_ports; port++) { | |
278 | if (!(dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port))) | |
279 | continue; | |
280 | dsa_cpu_dsa_destroy(&ds->ports[port]); | |
281 | ||
282 | /* Clearing a bit which is not set does no harm */ | |
283 | ds->cpu_port_mask |= ~(1 << port); | |
284 | ds->dsa_port_mask |= ~(1 << port); | |
285 | } | |
286 | ||
287 | if (ds->slave_mii_bus && ds->ops->phy_read) | |
288 | mdiobus_unregister(ds->slave_mii_bus); | |
289 | ||
290 | dsa_switch_unregister_notifier(ds); | |
291 | } | |
292 | ||
a6a71f19 VD |
293 | /* platform driver init and cleanup *****************************************/ |
294 | static int dev_is_class(struct device *dev, void *class) | |
295 | { | |
296 | if (dev->class != NULL && !strcmp(dev->class->name, class)) | |
297 | return 1; | |
298 | ||
299 | return 0; | |
300 | } | |
301 | ||
302 | static struct device *dev_find_class(struct device *parent, char *class) | |
303 | { | |
304 | if (dev_is_class(parent, class)) { | |
305 | get_device(parent); | |
306 | return parent; | |
307 | } | |
308 | ||
309 | return device_find_child(parent, class, dev_is_class); | |
310 | } | |
311 | ||
312 | struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev) | |
313 | { | |
314 | struct device *d; | |
315 | ||
316 | d = dev_find_class(dev, "mdio_bus"); | |
317 | if (d != NULL) { | |
318 | struct mii_bus *bus; | |
319 | ||
320 | bus = to_mii_bus(d); | |
321 | put_device(d); | |
322 | ||
323 | return bus; | |
324 | } | |
325 | ||
326 | return NULL; | |
327 | } | |
328 | EXPORT_SYMBOL_GPL(dsa_host_dev_to_mii_bus); | |
329 | ||
330 | #ifdef CONFIG_OF | |
331 | static int dsa_of_setup_routing_table(struct dsa_platform_data *pd, | |
332 | struct dsa_chip_data *cd, | |
333 | int chip_index, int port_index, | |
334 | struct device_node *link) | |
335 | { | |
336 | const __be32 *reg; | |
337 | int link_sw_addr; | |
338 | struct device_node *parent_sw; | |
339 | int len; | |
340 | ||
341 | parent_sw = of_get_parent(link); | |
342 | if (!parent_sw) | |
343 | return -EINVAL; | |
344 | ||
345 | reg = of_get_property(parent_sw, "reg", &len); | |
346 | if (!reg || (len != sizeof(*reg) * 2)) | |
347 | return -EINVAL; | |
348 | ||
349 | /* | |
350 | * Get the destination switch number from the second field of its 'reg' | |
351 | * property, i.e. for "reg = <0x19 1>" sw_addr is '1'. | |
352 | */ | |
353 | link_sw_addr = be32_to_cpup(reg + 1); | |
354 | ||
355 | if (link_sw_addr >= pd->nr_chips) | |
356 | return -EINVAL; | |
357 | ||
358 | cd->rtable[link_sw_addr] = port_index; | |
359 | ||
360 | return 0; | |
361 | } | |
362 | ||
363 | static int dsa_of_probe_links(struct dsa_platform_data *pd, | |
364 | struct dsa_chip_data *cd, | |
365 | int chip_index, int port_index, | |
366 | struct device_node *port, | |
367 | const char *port_name) | |
368 | { | |
369 | struct device_node *link; | |
370 | int link_index; | |
371 | int ret; | |
372 | ||
373 | for (link_index = 0;; link_index++) { | |
374 | link = of_parse_phandle(port, "link", link_index); | |
375 | if (!link) | |
376 | break; | |
377 | ||
378 | if (!strcmp(port_name, "dsa") && pd->nr_chips > 1) { | |
379 | ret = dsa_of_setup_routing_table(pd, cd, chip_index, | |
380 | port_index, link); | |
381 | if (ret) | |
382 | return ret; | |
383 | } | |
384 | } | |
385 | return 0; | |
386 | } | |
387 | ||
388 | static void dsa_of_free_platform_data(struct dsa_platform_data *pd) | |
389 | { | |
390 | int i; | |
391 | int port_index; | |
392 | ||
393 | for (i = 0; i < pd->nr_chips; i++) { | |
394 | port_index = 0; | |
395 | while (port_index < DSA_MAX_PORTS) { | |
396 | kfree(pd->chip[i].port_names[port_index]); | |
397 | port_index++; | |
398 | } | |
399 | ||
400 | /* Drop our reference to the MDIO bus device */ | |
401 | if (pd->chip[i].host_dev) | |
402 | put_device(pd->chip[i].host_dev); | |
403 | } | |
404 | kfree(pd->chip); | |
405 | } | |
406 | ||
407 | static int dsa_of_probe(struct device *dev) | |
408 | { | |
409 | struct device_node *np = dev->of_node; | |
410 | struct device_node *child, *mdio, *ethernet, *port; | |
411 | struct mii_bus *mdio_bus, *mdio_bus_switch; | |
412 | struct net_device *ethernet_dev; | |
413 | struct dsa_platform_data *pd; | |
414 | struct dsa_chip_data *cd; | |
415 | const char *port_name; | |
416 | int chip_index, port_index; | |
417 | const unsigned int *sw_addr, *port_reg; | |
418 | u32 eeprom_len; | |
419 | int ret; | |
420 | ||
421 | mdio = of_parse_phandle(np, "dsa,mii-bus", 0); | |
422 | if (!mdio) | |
423 | return -EINVAL; | |
424 | ||
425 | mdio_bus = of_mdio_find_bus(mdio); | |
426 | if (!mdio_bus) | |
427 | return -EPROBE_DEFER; | |
428 | ||
429 | ethernet = of_parse_phandle(np, "dsa,ethernet", 0); | |
430 | if (!ethernet) { | |
431 | ret = -EINVAL; | |
432 | goto out_put_mdio; | |
433 | } | |
434 | ||
435 | ethernet_dev = of_find_net_device_by_node(ethernet); | |
436 | if (!ethernet_dev) { | |
437 | ret = -EPROBE_DEFER; | |
438 | goto out_put_mdio; | |
439 | } | |
440 | ||
441 | pd = kzalloc(sizeof(*pd), GFP_KERNEL); | |
442 | if (!pd) { | |
443 | ret = -ENOMEM; | |
444 | goto out_put_ethernet; | |
445 | } | |
446 | ||
447 | dev->platform_data = pd; | |
448 | pd->of_netdev = ethernet_dev; | |
449 | pd->nr_chips = of_get_available_child_count(np); | |
450 | if (pd->nr_chips > DSA_MAX_SWITCHES) | |
451 | pd->nr_chips = DSA_MAX_SWITCHES; | |
452 | ||
453 | pd->chip = kcalloc(pd->nr_chips, sizeof(struct dsa_chip_data), | |
454 | GFP_KERNEL); | |
455 | if (!pd->chip) { | |
456 | ret = -ENOMEM; | |
457 | goto out_free; | |
458 | } | |
459 | ||
460 | chip_index = -1; | |
461 | for_each_available_child_of_node(np, child) { | |
462 | int i; | |
463 | ||
464 | chip_index++; | |
465 | cd = &pd->chip[chip_index]; | |
466 | ||
467 | cd->of_node = child; | |
468 | ||
469 | /* Initialize the routing table */ | |
470 | for (i = 0; i < DSA_MAX_SWITCHES; ++i) | |
471 | cd->rtable[i] = DSA_RTABLE_NONE; | |
472 | ||
473 | /* When assigning the host device, increment its refcount */ | |
474 | cd->host_dev = get_device(&mdio_bus->dev); | |
475 | ||
476 | sw_addr = of_get_property(child, "reg", NULL); | |
477 | if (!sw_addr) | |
478 | continue; | |
479 | ||
480 | cd->sw_addr = be32_to_cpup(sw_addr); | |
481 | if (cd->sw_addr >= PHY_MAX_ADDR) | |
482 | continue; | |
483 | ||
484 | if (!of_property_read_u32(child, "eeprom-length", &eeprom_len)) | |
485 | cd->eeprom_len = eeprom_len; | |
486 | ||
487 | mdio = of_parse_phandle(child, "mii-bus", 0); | |
488 | if (mdio) { | |
489 | mdio_bus_switch = of_mdio_find_bus(mdio); | |
490 | if (!mdio_bus_switch) { | |
491 | ret = -EPROBE_DEFER; | |
492 | goto out_free_chip; | |
493 | } | |
494 | ||
495 | /* Drop the mdio_bus device ref, replacing the host | |
496 | * device with the mdio_bus_switch device, keeping | |
497 | * the refcount from of_mdio_find_bus() above. | |
498 | */ | |
499 | put_device(cd->host_dev); | |
500 | cd->host_dev = &mdio_bus_switch->dev; | |
501 | } | |
502 | ||
503 | for_each_available_child_of_node(child, port) { | |
504 | port_reg = of_get_property(port, "reg", NULL); | |
505 | if (!port_reg) | |
506 | continue; | |
507 | ||
508 | port_index = be32_to_cpup(port_reg); | |
509 | if (port_index >= DSA_MAX_PORTS) | |
510 | break; | |
511 | ||
512 | port_name = of_get_property(port, "label", NULL); | |
513 | if (!port_name) | |
514 | continue; | |
515 | ||
516 | cd->port_dn[port_index] = port; | |
517 | ||
518 | cd->port_names[port_index] = kstrdup(port_name, | |
519 | GFP_KERNEL); | |
520 | if (!cd->port_names[port_index]) { | |
521 | ret = -ENOMEM; | |
522 | goto out_free_chip; | |
523 | } | |
524 | ||
525 | ret = dsa_of_probe_links(pd, cd, chip_index, | |
526 | port_index, port, port_name); | |
527 | if (ret) | |
528 | goto out_free_chip; | |
529 | ||
530 | } | |
531 | } | |
532 | ||
533 | /* The individual chips hold their own refcount on the mdio bus, | |
534 | * so drop ours */ | |
535 | put_device(&mdio_bus->dev); | |
536 | ||
537 | return 0; | |
538 | ||
539 | out_free_chip: | |
540 | dsa_of_free_platform_data(pd); | |
541 | out_free: | |
542 | kfree(pd); | |
543 | dev->platform_data = NULL; | |
544 | out_put_ethernet: | |
545 | put_device(ðernet_dev->dev); | |
546 | out_put_mdio: | |
547 | put_device(&mdio_bus->dev); | |
548 | return ret; | |
549 | } | |
550 | ||
551 | static void dsa_of_remove(struct device *dev) | |
552 | { | |
553 | struct dsa_platform_data *pd = dev->platform_data; | |
554 | ||
555 | if (!dev->of_node) | |
556 | return; | |
557 | ||
558 | dsa_of_free_platform_data(pd); | |
559 | put_device(&pd->of_netdev->dev); | |
560 | kfree(pd); | |
561 | } | |
562 | #else | |
563 | static inline int dsa_of_probe(struct device *dev) | |
564 | { | |
565 | return 0; | |
566 | } | |
567 | ||
568 | static inline void dsa_of_remove(struct device *dev) | |
569 | { | |
570 | } | |
571 | #endif | |
572 | ||
573 | static int dsa_setup_dst(struct dsa_switch_tree *dst, struct net_device *dev, | |
574 | struct device *parent, struct dsa_platform_data *pd) | |
575 | { | |
576 | int i; | |
577 | unsigned configured = 0; | |
578 | ||
579 | dst->pd = pd; | |
a6a71f19 VD |
580 | |
581 | for (i = 0; i < pd->nr_chips; i++) { | |
582 | struct dsa_switch *ds; | |
583 | ||
06d4d450 | 584 | ds = dsa_switch_setup(dst, dev, i, parent, pd->chip[i].host_dev); |
a6a71f19 VD |
585 | if (IS_ERR(ds)) { |
586 | netdev_err(dev, "[%d]: couldn't create dsa switch instance (error %ld)\n", | |
587 | i, PTR_ERR(ds)); | |
588 | continue; | |
589 | } | |
590 | ||
591 | dst->ds[i] = ds; | |
592 | ||
593 | ++configured; | |
594 | } | |
595 | ||
596 | /* | |
597 | * If no switch was found, exit cleanly | |
598 | */ | |
599 | if (!configured) | |
600 | return -EPROBE_DEFER; | |
601 | ||
602 | /* | |
603 | * If we use a tagging format that doesn't have an ethertype | |
604 | * field, make sure that all packets from this point on get | |
605 | * sent to the tag format's receive function. | |
606 | */ | |
607 | wmb(); | |
2f657a60 | 608 | dev->dsa_ptr = dst->cpu_dp; |
a6a71f19 | 609 | |
f2f23566 | 610 | return dsa_master_ethtool_setup(dst->cpu_dp->netdev); |
a6a71f19 VD |
611 | } |
612 | ||
613 | static int dsa_probe(struct platform_device *pdev) | |
614 | { | |
615 | struct dsa_platform_data *pd = pdev->dev.platform_data; | |
616 | struct net_device *dev; | |
617 | struct dsa_switch_tree *dst; | |
618 | int ret; | |
619 | ||
620 | if (pdev->dev.of_node) { | |
621 | ret = dsa_of_probe(&pdev->dev); | |
622 | if (ret) | |
623 | return ret; | |
624 | ||
625 | pd = pdev->dev.platform_data; | |
626 | } | |
627 | ||
628 | if (pd == NULL || (pd->netdev == NULL && pd->of_netdev == NULL)) | |
629 | return -EINVAL; | |
630 | ||
631 | if (pd->of_netdev) { | |
632 | dev = pd->of_netdev; | |
633 | dev_hold(dev); | |
634 | } else { | |
635 | dev = dsa_dev_to_net_device(pd->netdev); | |
636 | } | |
637 | if (dev == NULL) { | |
638 | ret = -EPROBE_DEFER; | |
639 | goto out; | |
640 | } | |
641 | ||
642 | if (dev->dsa_ptr != NULL) { | |
643 | dev_put(dev); | |
644 | ret = -EEXIST; | |
645 | goto out; | |
646 | } | |
647 | ||
648 | dst = devm_kzalloc(&pdev->dev, sizeof(*dst), GFP_KERNEL); | |
649 | if (dst == NULL) { | |
650 | dev_put(dev); | |
651 | ret = -ENOMEM; | |
652 | goto out; | |
653 | } | |
654 | ||
655 | platform_set_drvdata(pdev, dst); | |
656 | ||
657 | ret = dsa_setup_dst(dst, dev, &pdev->dev, pd); | |
658 | if (ret) { | |
659 | dev_put(dev); | |
660 | goto out; | |
661 | } | |
662 | ||
663 | return 0; | |
664 | ||
665 | out: | |
666 | dsa_of_remove(&pdev->dev); | |
667 | ||
668 | return ret; | |
669 | } | |
670 | ||
671 | static void dsa_remove_dst(struct dsa_switch_tree *dst) | |
672 | { | |
673 | int i; | |
674 | ||
f2f23566 | 675 | dsa_master_ethtool_restore(dst->cpu_dp->netdev); |
1943563d | 676 | |
6d3c8c0d | 677 | dst->cpu_dp->netdev->dsa_ptr = NULL; |
a6a71f19 VD |
678 | |
679 | /* If we used a tagging format that doesn't have an ethertype | |
680 | * field, make sure that all packets from this point get sent | |
681 | * without the tag and go through the regular receive path. | |
682 | */ | |
683 | wmb(); | |
684 | ||
685 | for (i = 0; i < dst->pd->nr_chips; i++) { | |
686 | struct dsa_switch *ds = dst->ds[i]; | |
687 | ||
688 | if (ds) | |
689 | dsa_switch_destroy(ds); | |
690 | } | |
691 | ||
6d3c8c0d | 692 | dev_put(dst->cpu_dp->netdev); |
a6a71f19 VD |
693 | } |
694 | ||
695 | static int dsa_remove(struct platform_device *pdev) | |
696 | { | |
697 | struct dsa_switch_tree *dst = platform_get_drvdata(pdev); | |
698 | ||
699 | dsa_remove_dst(dst); | |
700 | dsa_of_remove(&pdev->dev); | |
701 | ||
702 | return 0; | |
703 | } | |
704 | ||
705 | static void dsa_shutdown(struct platform_device *pdev) | |
706 | { | |
707 | } | |
708 | ||
709 | #ifdef CONFIG_PM_SLEEP | |
710 | static int dsa_suspend(struct device *d) | |
711 | { | |
712 | struct platform_device *pdev = to_platform_device(d); | |
713 | struct dsa_switch_tree *dst = platform_get_drvdata(pdev); | |
714 | int i, ret = 0; | |
715 | ||
716 | for (i = 0; i < dst->pd->nr_chips; i++) { | |
717 | struct dsa_switch *ds = dst->ds[i]; | |
718 | ||
719 | if (ds != NULL) | |
720 | ret = dsa_switch_suspend(ds); | |
721 | } | |
722 | ||
723 | return ret; | |
724 | } | |
725 | ||
726 | static int dsa_resume(struct device *d) | |
727 | { | |
728 | struct platform_device *pdev = to_platform_device(d); | |
729 | struct dsa_switch_tree *dst = platform_get_drvdata(pdev); | |
730 | int i, ret = 0; | |
731 | ||
732 | for (i = 0; i < dst->pd->nr_chips; i++) { | |
733 | struct dsa_switch *ds = dst->ds[i]; | |
734 | ||
735 | if (ds != NULL) | |
736 | ret = dsa_switch_resume(ds); | |
737 | } | |
738 | ||
739 | return ret; | |
740 | } | |
741 | #endif | |
742 | ||
37b8da1a AS |
743 | /* legacy way, bypassing the bridge *****************************************/ |
744 | int dsa_legacy_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], | |
745 | struct net_device *dev, | |
746 | const unsigned char *addr, u16 vid, | |
747 | u16 flags) | |
748 | { | |
749 | struct dsa_slave_priv *p = netdev_priv(dev); | |
750 | struct dsa_port *dp = p->dp; | |
751 | ||
752 | return dsa_port_fdb_add(dp, addr, vid); | |
753 | } | |
754 | ||
755 | int dsa_legacy_fdb_del(struct ndmsg *ndm, struct nlattr *tb[], | |
756 | struct net_device *dev, | |
757 | const unsigned char *addr, u16 vid) | |
758 | { | |
759 | struct dsa_slave_priv *p = netdev_priv(dev); | |
760 | struct dsa_port *dp = p->dp; | |
761 | ||
762 | return dsa_port_fdb_del(dp, addr, vid); | |
763 | } | |
764 | ||
a6a71f19 VD |
765 | static SIMPLE_DEV_PM_OPS(dsa_pm_ops, dsa_suspend, dsa_resume); |
766 | ||
767 | static const struct of_device_id dsa_of_match_table[] = { | |
768 | { .compatible = "marvell,dsa", }, | |
769 | {} | |
770 | }; | |
771 | MODULE_DEVICE_TABLE(of, dsa_of_match_table); | |
772 | ||
773 | static struct platform_driver dsa_driver = { | |
774 | .probe = dsa_probe, | |
775 | .remove = dsa_remove, | |
776 | .shutdown = dsa_shutdown, | |
777 | .driver = { | |
778 | .name = "dsa", | |
779 | .of_match_table = dsa_of_match_table, | |
780 | .pm = &dsa_pm_ops, | |
781 | }, | |
782 | }; | |
783 | ||
784 | int dsa_legacy_register(void) | |
785 | { | |
786 | return platform_driver_register(&dsa_driver); | |
787 | } | |
788 | ||
789 | void dsa_legacy_unregister(void) | |
790 | { | |
791 | platform_driver_unregister(&dsa_driver); | |
792 | } |