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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 | ||
51579c3f GR |
12 | #include <linux/ctype.h> |
13 | #include <linux/device.h> | |
14 | #include <linux/hwmon.h> | |
91da11f8 | 15 | #include <linux/list.h> |
91da11f8 | 16 | #include <linux/platform_device.h> |
5a0e3ad6 | 17 | #include <linux/slab.h> |
3a9a231d | 18 | #include <linux/module.h> |
91da11f8 | 19 | #include <net/dsa.h> |
5e95329b FF |
20 | #include <linux/of.h> |
21 | #include <linux/of_mdio.h> | |
22 | #include <linux/of_platform.h> | |
769a0202 | 23 | #include <linux/of_net.h> |
51579c3f | 24 | #include <linux/sysfs.h> |
91da11f8 LB |
25 | #include "dsa_priv.h" |
26 | ||
27 | char dsa_driver_version[] = "0.1"; | |
28 | ||
29 | ||
30 | /* switch driver registration ***********************************************/ | |
31 | static DEFINE_MUTEX(dsa_switch_drivers_mutex); | |
32 | static LIST_HEAD(dsa_switch_drivers); | |
33 | ||
34 | void register_switch_driver(struct dsa_switch_driver *drv) | |
35 | { | |
36 | mutex_lock(&dsa_switch_drivers_mutex); | |
37 | list_add_tail(&drv->list, &dsa_switch_drivers); | |
38 | mutex_unlock(&dsa_switch_drivers_mutex); | |
39 | } | |
ad293b8a | 40 | EXPORT_SYMBOL_GPL(register_switch_driver); |
91da11f8 LB |
41 | |
42 | void unregister_switch_driver(struct dsa_switch_driver *drv) | |
43 | { | |
44 | mutex_lock(&dsa_switch_drivers_mutex); | |
45 | list_del_init(&drv->list); | |
46 | mutex_unlock(&dsa_switch_drivers_mutex); | |
47 | } | |
ad293b8a | 48 | EXPORT_SYMBOL_GPL(unregister_switch_driver); |
91da11f8 LB |
49 | |
50 | static struct dsa_switch_driver * | |
b4d2394d | 51 | dsa_switch_probe(struct device *host_dev, int sw_addr, char **_name) |
91da11f8 LB |
52 | { |
53 | struct dsa_switch_driver *ret; | |
54 | struct list_head *list; | |
55 | char *name; | |
56 | ||
57 | ret = NULL; | |
58 | name = NULL; | |
59 | ||
60 | mutex_lock(&dsa_switch_drivers_mutex); | |
61 | list_for_each(list, &dsa_switch_drivers) { | |
62 | struct dsa_switch_driver *drv; | |
63 | ||
64 | drv = list_entry(list, struct dsa_switch_driver, list); | |
65 | ||
b4d2394d | 66 | name = drv->probe(host_dev, sw_addr); |
91da11f8 LB |
67 | if (name != NULL) { |
68 | ret = drv; | |
69 | break; | |
70 | } | |
71 | } | |
72 | mutex_unlock(&dsa_switch_drivers_mutex); | |
73 | ||
74 | *_name = name; | |
75 | ||
76 | return ret; | |
77 | } | |
78 | ||
51579c3f GR |
79 | /* hwmon support ************************************************************/ |
80 | ||
81 | #ifdef CONFIG_NET_DSA_HWMON | |
82 | ||
83 | static ssize_t temp1_input_show(struct device *dev, | |
84 | struct device_attribute *attr, char *buf) | |
85 | { | |
86 | struct dsa_switch *ds = dev_get_drvdata(dev); | |
87 | int temp, ret; | |
88 | ||
89 | ret = ds->drv->get_temp(ds, &temp); | |
90 | if (ret < 0) | |
91 | return ret; | |
92 | ||
93 | return sprintf(buf, "%d\n", temp * 1000); | |
94 | } | |
95 | static DEVICE_ATTR_RO(temp1_input); | |
96 | ||
97 | static ssize_t temp1_max_show(struct device *dev, | |
98 | struct device_attribute *attr, char *buf) | |
99 | { | |
100 | struct dsa_switch *ds = dev_get_drvdata(dev); | |
101 | int temp, ret; | |
102 | ||
103 | ret = ds->drv->get_temp_limit(ds, &temp); | |
104 | if (ret < 0) | |
105 | return ret; | |
106 | ||
107 | return sprintf(buf, "%d\n", temp * 1000); | |
108 | } | |
109 | ||
110 | static ssize_t temp1_max_store(struct device *dev, | |
111 | struct device_attribute *attr, const char *buf, | |
112 | size_t count) | |
113 | { | |
114 | struct dsa_switch *ds = dev_get_drvdata(dev); | |
115 | int temp, ret; | |
116 | ||
117 | ret = kstrtoint(buf, 0, &temp); | |
118 | if (ret < 0) | |
119 | return ret; | |
120 | ||
121 | ret = ds->drv->set_temp_limit(ds, DIV_ROUND_CLOSEST(temp, 1000)); | |
122 | if (ret < 0) | |
123 | return ret; | |
124 | ||
125 | return count; | |
126 | } | |
e3122b7f | 127 | static DEVICE_ATTR_RW(temp1_max); |
51579c3f GR |
128 | |
129 | static ssize_t temp1_max_alarm_show(struct device *dev, | |
130 | struct device_attribute *attr, char *buf) | |
131 | { | |
132 | struct dsa_switch *ds = dev_get_drvdata(dev); | |
133 | bool alarm; | |
134 | int ret; | |
135 | ||
136 | ret = ds->drv->get_temp_alarm(ds, &alarm); | |
137 | if (ret < 0) | |
138 | return ret; | |
139 | ||
140 | return sprintf(buf, "%d\n", alarm); | |
141 | } | |
142 | static DEVICE_ATTR_RO(temp1_max_alarm); | |
143 | ||
144 | static struct attribute *dsa_hwmon_attrs[] = { | |
145 | &dev_attr_temp1_input.attr, /* 0 */ | |
146 | &dev_attr_temp1_max.attr, /* 1 */ | |
147 | &dev_attr_temp1_max_alarm.attr, /* 2 */ | |
148 | NULL | |
149 | }; | |
150 | ||
151 | static umode_t dsa_hwmon_attrs_visible(struct kobject *kobj, | |
152 | struct attribute *attr, int index) | |
153 | { | |
154 | struct device *dev = container_of(kobj, struct device, kobj); | |
155 | struct dsa_switch *ds = dev_get_drvdata(dev); | |
156 | struct dsa_switch_driver *drv = ds->drv; | |
157 | umode_t mode = attr->mode; | |
158 | ||
159 | if (index == 1) { | |
160 | if (!drv->get_temp_limit) | |
161 | mode = 0; | |
e3122b7f VD |
162 | else if (!drv->set_temp_limit) |
163 | mode &= ~S_IWUSR; | |
51579c3f GR |
164 | } else if (index == 2 && !drv->get_temp_alarm) { |
165 | mode = 0; | |
166 | } | |
167 | return mode; | |
168 | } | |
169 | ||
170 | static const struct attribute_group dsa_hwmon_group = { | |
171 | .attrs = dsa_hwmon_attrs, | |
172 | .is_visible = dsa_hwmon_attrs_visible, | |
173 | }; | |
174 | __ATTRIBUTE_GROUPS(dsa_hwmon); | |
175 | ||
176 | #endif /* CONFIG_NET_DSA_HWMON */ | |
91da11f8 LB |
177 | |
178 | /* basic switch operations **************************************************/ | |
39b0c705 AL |
179 | static int dsa_cpu_dsa_setup(struct dsa_switch *ds, struct net_device *master) |
180 | { | |
181 | struct dsa_chip_data *cd = ds->pd; | |
182 | struct device_node *port_dn; | |
183 | struct phy_device *phydev; | |
184 | int ret, port; | |
185 | ||
186 | for (port = 0; port < DSA_MAX_PORTS; port++) { | |
187 | if (!(dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port))) | |
188 | continue; | |
189 | ||
190 | port_dn = cd->port_dn[port]; | |
191 | if (of_phy_is_fixed_link(port_dn)) { | |
192 | ret = of_phy_register_fixed_link(port_dn); | |
193 | if (ret) { | |
194 | netdev_err(master, | |
195 | "failed to register fixed PHY\n"); | |
196 | return ret; | |
197 | } | |
198 | phydev = of_phy_find_device(port_dn); | |
199 | genphy_config_init(phydev); | |
200 | genphy_read_status(phydev); | |
201 | if (ds->drv->adjust_link) | |
202 | ds->drv->adjust_link(ds, port, phydev); | |
203 | } | |
204 | } | |
205 | return 0; | |
206 | } | |
207 | ||
df197195 | 208 | static int dsa_switch_setup_one(struct dsa_switch *ds, struct device *parent) |
91da11f8 | 209 | { |
df197195 FF |
210 | struct dsa_switch_driver *drv = ds->drv; |
211 | struct dsa_switch_tree *dst = ds->dst; | |
212 | struct dsa_chip_data *pd = ds->pd; | |
f9bf5a2c | 213 | bool valid_name_found = false; |
df197195 FF |
214 | int index = ds->index; |
215 | int i, ret; | |
91da11f8 LB |
216 | |
217 | /* | |
218 | * Validate supplied switch configuration. | |
219 | */ | |
91da11f8 LB |
220 | for (i = 0; i < DSA_MAX_PORTS; i++) { |
221 | char *name; | |
222 | ||
223 | name = pd->port_names[i]; | |
224 | if (name == NULL) | |
225 | continue; | |
226 | ||
227 | if (!strcmp(name, "cpu")) { | |
e84665c9 | 228 | if (dst->cpu_switch != -1) { |
a2ae6007 JP |
229 | netdev_err(dst->master_netdev, |
230 | "multiple cpu ports?!\n"); | |
91da11f8 LB |
231 | ret = -EINVAL; |
232 | goto out; | |
233 | } | |
e84665c9 LB |
234 | dst->cpu_switch = index; |
235 | dst->cpu_port = i; | |
236 | } else if (!strcmp(name, "dsa")) { | |
237 | ds->dsa_port_mask |= 1 << i; | |
91da11f8 | 238 | } else { |
e84665c9 | 239 | ds->phys_port_mask |= 1 << i; |
91da11f8 | 240 | } |
f9bf5a2c | 241 | valid_name_found = true; |
91da11f8 LB |
242 | } |
243 | ||
f9bf5a2c FF |
244 | if (!valid_name_found && i == DSA_MAX_PORTS) { |
245 | ret = -EINVAL; | |
246 | goto out; | |
247 | } | |
91da11f8 | 248 | |
0d8bcdd3 FF |
249 | /* Make the built-in MII bus mask match the number of ports, |
250 | * switch drivers can override this later | |
251 | */ | |
252 | ds->phys_mii_mask = ds->phys_port_mask; | |
253 | ||
91da11f8 | 254 | /* |
e84665c9 LB |
255 | * If the CPU connects to this switch, set the switch tree |
256 | * tagging protocol to the preferred tagging format of this | |
257 | * switch. | |
91da11f8 | 258 | */ |
5075314e | 259 | if (dst->cpu_switch == index) { |
59299031 | 260 | switch (ds->tag_protocol) { |
5075314e AD |
261 | #ifdef CONFIG_NET_DSA_TAG_DSA |
262 | case DSA_TAG_PROTO_DSA: | |
263 | dst->rcv = dsa_netdev_ops.rcv; | |
264 | break; | |
265 | #endif | |
266 | #ifdef CONFIG_NET_DSA_TAG_EDSA | |
267 | case DSA_TAG_PROTO_EDSA: | |
268 | dst->rcv = edsa_netdev_ops.rcv; | |
269 | break; | |
270 | #endif | |
271 | #ifdef CONFIG_NET_DSA_TAG_TRAILER | |
272 | case DSA_TAG_PROTO_TRAILER: | |
273 | dst->rcv = trailer_netdev_ops.rcv; | |
274 | break; | |
275 | #endif | |
276 | #ifdef CONFIG_NET_DSA_TAG_BRCM | |
277 | case DSA_TAG_PROTO_BRCM: | |
278 | dst->rcv = brcm_netdev_ops.rcv; | |
279 | break; | |
280 | #endif | |
ae439286 | 281 | case DSA_TAG_PROTO_NONE: |
5075314e | 282 | break; |
ae439286 AL |
283 | default: |
284 | ret = -ENOPROTOOPT; | |
285 | goto out; | |
5075314e | 286 | } |
91da11f8 | 287 | |
59299031 | 288 | dst->tag_protocol = ds->tag_protocol; |
5075314e | 289 | } |
91da11f8 LB |
290 | |
291 | /* | |
292 | * Do basic register setup. | |
293 | */ | |
294 | ret = drv->setup(ds); | |
295 | if (ret < 0) | |
296 | goto out; | |
297 | ||
e84665c9 | 298 | ret = drv->set_addr(ds, dst->master_netdev->dev_addr); |
91da11f8 LB |
299 | if (ret < 0) |
300 | goto out; | |
301 | ||
302 | ds->slave_mii_bus = mdiobus_alloc(); | |
303 | if (ds->slave_mii_bus == NULL) { | |
304 | ret = -ENOMEM; | |
305 | goto out; | |
306 | } | |
307 | dsa_slave_mii_bus_init(ds); | |
308 | ||
309 | ret = mdiobus_register(ds->slave_mii_bus); | |
310 | if (ret < 0) | |
311 | goto out_free; | |
312 | ||
313 | ||
314 | /* | |
315 | * Create network devices for physical switch ports. | |
316 | */ | |
91da11f8 | 317 | for (i = 0; i < DSA_MAX_PORTS; i++) { |
e84665c9 | 318 | if (!(ds->phys_port_mask & (1 << i))) |
91da11f8 LB |
319 | continue; |
320 | ||
d87d6f44 GR |
321 | ret = dsa_slave_create(ds, parent, i, pd->port_names[i]); |
322 | if (ret < 0) { | |
a2ae6007 JP |
323 | netdev_err(dst->master_netdev, "[%d]: can't create dsa slave device for port %d(%s)\n", |
324 | index, i, pd->port_names[i]); | |
d87d6f44 | 325 | ret = 0; |
91da11f8 | 326 | } |
91da11f8 LB |
327 | } |
328 | ||
39b0c705 AL |
329 | /* Perform configuration of the CPU and DSA ports */ |
330 | ret = dsa_cpu_dsa_setup(ds, dst->master_netdev); | |
331 | if (ret < 0) { | |
332 | netdev_err(dst->master_netdev, "[%d] : can't configure CPU and DSA ports\n", | |
333 | index); | |
334 | ret = 0; | |
335 | } | |
336 | ||
51579c3f GR |
337 | #ifdef CONFIG_NET_DSA_HWMON |
338 | /* If the switch provides a temperature sensor, | |
339 | * register with hardware monitoring subsystem. | |
340 | * Treat registration error as non-fatal and ignore it. | |
341 | */ | |
342 | if (drv->get_temp) { | |
343 | const char *netname = netdev_name(dst->master_netdev); | |
344 | char hname[IFNAMSIZ + 1]; | |
345 | int i, j; | |
346 | ||
347 | /* Create valid hwmon 'name' attribute */ | |
348 | for (i = j = 0; i < IFNAMSIZ && netname[i]; i++) { | |
349 | if (isalnum(netname[i])) | |
350 | hname[j++] = netname[i]; | |
351 | } | |
352 | hname[j] = '\0'; | |
353 | scnprintf(ds->hwmon_name, sizeof(ds->hwmon_name), "%s_dsa%d", | |
354 | hname, index); | |
355 | ds->hwmon_dev = hwmon_device_register_with_groups(NULL, | |
356 | ds->hwmon_name, ds, dsa_hwmon_groups); | |
357 | if (IS_ERR(ds->hwmon_dev)) | |
358 | ds->hwmon_dev = NULL; | |
359 | } | |
360 | #endif /* CONFIG_NET_DSA_HWMON */ | |
361 | ||
df197195 | 362 | return ret; |
91da11f8 LB |
363 | |
364 | out_free: | |
365 | mdiobus_free(ds->slave_mii_bus); | |
366 | out: | |
91da11f8 | 367 | kfree(ds); |
df197195 FF |
368 | return ret; |
369 | } | |
370 | ||
371 | static struct dsa_switch * | |
372 | dsa_switch_setup(struct dsa_switch_tree *dst, int index, | |
373 | struct device *parent, struct device *host_dev) | |
374 | { | |
375 | struct dsa_chip_data *pd = dst->pd->chip + index; | |
376 | struct dsa_switch_driver *drv; | |
377 | struct dsa_switch *ds; | |
378 | int ret; | |
379 | char *name; | |
380 | ||
381 | /* | |
382 | * Probe for switch model. | |
383 | */ | |
384 | drv = dsa_switch_probe(host_dev, pd->sw_addr, &name); | |
385 | if (drv == NULL) { | |
386 | netdev_err(dst->master_netdev, "[%d]: could not detect attached switch\n", | |
387 | index); | |
388 | return ERR_PTR(-EINVAL); | |
389 | } | |
390 | netdev_info(dst->master_netdev, "[%d]: detected a %s switch\n", | |
391 | index, name); | |
392 | ||
393 | ||
394 | /* | |
395 | * Allocate and initialise switch state. | |
396 | */ | |
397 | ds = kzalloc(sizeof(*ds) + drv->priv_size, GFP_KERNEL); | |
398 | if (ds == NULL) | |
24595346 | 399 | return ERR_PTR(-ENOMEM); |
df197195 FF |
400 | |
401 | ds->dst = dst; | |
402 | ds->index = index; | |
403 | ds->pd = pd; | |
404 | ds->drv = drv; | |
59299031 | 405 | ds->tag_protocol = drv->tag_protocol; |
df197195 FF |
406 | ds->master_dev = host_dev; |
407 | ||
408 | ret = dsa_switch_setup_one(ds, parent); | |
409 | if (ret) | |
24595346 | 410 | return ERR_PTR(ret); |
df197195 FF |
411 | |
412 | return ds; | |
91da11f8 LB |
413 | } |
414 | ||
415 | static void dsa_switch_destroy(struct dsa_switch *ds) | |
416 | { | |
51579c3f GR |
417 | #ifdef CONFIG_NET_DSA_HWMON |
418 | if (ds->hwmon_dev) | |
419 | hwmon_device_unregister(ds->hwmon_dev); | |
420 | #endif | |
91da11f8 LB |
421 | } |
422 | ||
e506d405 | 423 | #ifdef CONFIG_PM_SLEEP |
24462549 FF |
424 | static int dsa_switch_suspend(struct dsa_switch *ds) |
425 | { | |
426 | int i, ret = 0; | |
427 | ||
428 | /* Suspend slave network devices */ | |
429 | for (i = 0; i < DSA_MAX_PORTS; i++) { | |
d79d2107 | 430 | if (!dsa_is_port_initialized(ds, i)) |
24462549 FF |
431 | continue; |
432 | ||
433 | ret = dsa_slave_suspend(ds->ports[i]); | |
434 | if (ret) | |
435 | return ret; | |
436 | } | |
437 | ||
438 | if (ds->drv->suspend) | |
439 | ret = ds->drv->suspend(ds); | |
440 | ||
441 | return ret; | |
442 | } | |
443 | ||
444 | static int dsa_switch_resume(struct dsa_switch *ds) | |
445 | { | |
446 | int i, ret = 0; | |
447 | ||
448 | if (ds->drv->resume) | |
449 | ret = ds->drv->resume(ds); | |
450 | ||
451 | if (ret) | |
452 | return ret; | |
453 | ||
454 | /* Resume slave network devices */ | |
455 | for (i = 0; i < DSA_MAX_PORTS; i++) { | |
d79d2107 | 456 | if (!dsa_is_port_initialized(ds, i)) |
24462549 FF |
457 | continue; |
458 | ||
459 | ret = dsa_slave_resume(ds->ports[i]); | |
460 | if (ret) | |
461 | return ret; | |
462 | } | |
463 | ||
464 | return 0; | |
465 | } | |
e506d405 | 466 | #endif |
24462549 | 467 | |
91da11f8 LB |
468 | |
469 | /* link polling *************************************************************/ | |
470 | static void dsa_link_poll_work(struct work_struct *ugly) | |
471 | { | |
e84665c9 LB |
472 | struct dsa_switch_tree *dst; |
473 | int i; | |
474 | ||
475 | dst = container_of(ugly, struct dsa_switch_tree, link_poll_work); | |
91da11f8 | 476 | |
e84665c9 LB |
477 | for (i = 0; i < dst->pd->nr_chips; i++) { |
478 | struct dsa_switch *ds = dst->ds[i]; | |
91da11f8 | 479 | |
e84665c9 LB |
480 | if (ds != NULL && ds->drv->poll_link != NULL) |
481 | ds->drv->poll_link(ds); | |
482 | } | |
483 | ||
484 | mod_timer(&dst->link_poll_timer, round_jiffies(jiffies + HZ)); | |
91da11f8 LB |
485 | } |
486 | ||
e84665c9 | 487 | static void dsa_link_poll_timer(unsigned long _dst) |
91da11f8 | 488 | { |
e84665c9 | 489 | struct dsa_switch_tree *dst = (void *)_dst; |
91da11f8 | 490 | |
e84665c9 | 491 | schedule_work(&dst->link_poll_work); |
91da11f8 LB |
492 | } |
493 | ||
494 | ||
495 | /* platform driver init and cleanup *****************************************/ | |
496 | static int dev_is_class(struct device *dev, void *class) | |
497 | { | |
498 | if (dev->class != NULL && !strcmp(dev->class->name, class)) | |
499 | return 1; | |
500 | ||
501 | return 0; | |
502 | } | |
503 | ||
504 | static struct device *dev_find_class(struct device *parent, char *class) | |
505 | { | |
506 | if (dev_is_class(parent, class)) { | |
507 | get_device(parent); | |
508 | return parent; | |
509 | } | |
510 | ||
511 | return device_find_child(parent, class, dev_is_class); | |
512 | } | |
513 | ||
b4d2394d | 514 | struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev) |
91da11f8 LB |
515 | { |
516 | struct device *d; | |
517 | ||
518 | d = dev_find_class(dev, "mdio_bus"); | |
519 | if (d != NULL) { | |
520 | struct mii_bus *bus; | |
521 | ||
522 | bus = to_mii_bus(d); | |
523 | put_device(d); | |
524 | ||
525 | return bus; | |
526 | } | |
527 | ||
528 | return NULL; | |
529 | } | |
b4d2394d | 530 | EXPORT_SYMBOL_GPL(dsa_host_dev_to_mii_bus); |
91da11f8 LB |
531 | |
532 | static struct net_device *dev_to_net_device(struct device *dev) | |
533 | { | |
534 | struct device *d; | |
535 | ||
536 | d = dev_find_class(dev, "net"); | |
537 | if (d != NULL) { | |
538 | struct net_device *nd; | |
539 | ||
540 | nd = to_net_dev(d); | |
541 | dev_hold(nd); | |
542 | put_device(d); | |
543 | ||
544 | return nd; | |
545 | } | |
546 | ||
547 | return NULL; | |
548 | } | |
549 | ||
5e95329b FF |
550 | #ifdef CONFIG_OF |
551 | static int dsa_of_setup_routing_table(struct dsa_platform_data *pd, | |
552 | struct dsa_chip_data *cd, | |
30303813 | 553 | int chip_index, int port_index, |
5e95329b FF |
554 | struct device_node *link) |
555 | { | |
5e95329b | 556 | const __be32 *reg; |
5e95329b FF |
557 | int link_sw_addr; |
558 | struct device_node *parent_sw; | |
559 | int len; | |
560 | ||
561 | parent_sw = of_get_parent(link); | |
562 | if (!parent_sw) | |
563 | return -EINVAL; | |
564 | ||
565 | reg = of_get_property(parent_sw, "reg", &len); | |
566 | if (!reg || (len != sizeof(*reg) * 2)) | |
567 | return -EINVAL; | |
568 | ||
30303813 PN |
569 | /* |
570 | * Get the destination switch number from the second field of its 'reg' | |
571 | * property, i.e. for "reg = <0x19 1>" sw_addr is '1'. | |
572 | */ | |
5e95329b FF |
573 | link_sw_addr = be32_to_cpup(reg + 1); |
574 | ||
575 | if (link_sw_addr >= pd->nr_chips) | |
576 | return -EINVAL; | |
577 | ||
578 | /* First time routing table allocation */ | |
579 | if (!cd->rtable) { | |
5bc4b46a FF |
580 | cd->rtable = kmalloc_array(pd->nr_chips, sizeof(s8), |
581 | GFP_KERNEL); | |
5e95329b FF |
582 | if (!cd->rtable) |
583 | return -ENOMEM; | |
584 | ||
585 | /* default to no valid uplink/downlink */ | |
586 | memset(cd->rtable, -1, pd->nr_chips * sizeof(s8)); | |
587 | } | |
588 | ||
30303813 | 589 | cd->rtable[link_sw_addr] = port_index; |
5e95329b FF |
590 | |
591 | return 0; | |
5e95329b FF |
592 | } |
593 | ||
1e72e6f8 AL |
594 | static int dsa_of_probe_links(struct dsa_platform_data *pd, |
595 | struct dsa_chip_data *cd, | |
596 | int chip_index, int port_index, | |
597 | struct device_node *port, | |
598 | const char *port_name) | |
599 | { | |
600 | struct device_node *link; | |
601 | int link_index; | |
602 | int ret; | |
603 | ||
604 | for (link_index = 0;; link_index++) { | |
605 | link = of_parse_phandle(port, "link", link_index); | |
606 | if (!link) | |
607 | break; | |
608 | ||
609 | if (!strcmp(port_name, "dsa") && pd->nr_chips > 1) { | |
610 | ret = dsa_of_setup_routing_table(pd, cd, chip_index, | |
611 | port_index, link); | |
612 | if (ret) | |
613 | return ret; | |
614 | } | |
615 | } | |
616 | return 0; | |
617 | } | |
618 | ||
21168245 FF |
619 | static void dsa_of_free_platform_data(struct dsa_platform_data *pd) |
620 | { | |
621 | int i; | |
622 | int port_index; | |
623 | ||
624 | for (i = 0; i < pd->nr_chips; i++) { | |
625 | port_index = 0; | |
5f64a7db | 626 | while (port_index < DSA_MAX_PORTS) { |
1f74714f | 627 | kfree(pd->chip[i].port_names[port_index]); |
5f64a7db FF |
628 | port_index++; |
629 | } | |
21168245 FF |
630 | kfree(pd->chip[i].rtable); |
631 | } | |
632 | kfree(pd->chip); | |
633 | } | |
634 | ||
f1a26a06 | 635 | static int dsa_of_probe(struct device *dev) |
5e95329b | 636 | { |
f1a26a06 | 637 | struct device_node *np = dev->of_node; |
1e72e6f8 | 638 | struct device_node *child, *mdio, *ethernet, *port; |
6bc6d0a8 | 639 | struct mii_bus *mdio_bus, *mdio_bus_switch; |
769a0202 | 640 | struct net_device *ethernet_dev; |
5e95329b FF |
641 | struct dsa_platform_data *pd; |
642 | struct dsa_chip_data *cd; | |
643 | const char *port_name; | |
644 | int chip_index, port_index; | |
645 | const unsigned int *sw_addr, *port_reg; | |
6793abb4 | 646 | u32 eeprom_len; |
21168245 | 647 | int ret; |
5e95329b FF |
648 | |
649 | mdio = of_parse_phandle(np, "dsa,mii-bus", 0); | |
650 | if (!mdio) | |
651 | return -EINVAL; | |
652 | ||
653 | mdio_bus = of_mdio_find_bus(mdio); | |
654 | if (!mdio_bus) | |
b324c07a | 655 | return -EPROBE_DEFER; |
5e95329b FF |
656 | |
657 | ethernet = of_parse_phandle(np, "dsa,ethernet", 0); | |
658 | if (!ethernet) | |
659 | return -EINVAL; | |
660 | ||
769a0202 | 661 | ethernet_dev = of_find_net_device_by_node(ethernet); |
5e95329b | 662 | if (!ethernet_dev) |
b324c07a | 663 | return -EPROBE_DEFER; |
5e95329b FF |
664 | |
665 | pd = kzalloc(sizeof(*pd), GFP_KERNEL); | |
666 | if (!pd) | |
667 | return -ENOMEM; | |
668 | ||
f1a26a06 | 669 | dev->platform_data = pd; |
769a0202 | 670 | pd->of_netdev = ethernet_dev; |
e04449fc | 671 | pd->nr_chips = of_get_available_child_count(np); |
5e95329b FF |
672 | if (pd->nr_chips > DSA_MAX_SWITCHES) |
673 | pd->nr_chips = DSA_MAX_SWITCHES; | |
674 | ||
6f2aed6a FF |
675 | pd->chip = kcalloc(pd->nr_chips, sizeof(struct dsa_chip_data), |
676 | GFP_KERNEL); | |
5e95329b FF |
677 | if (!pd->chip) { |
678 | ret = -ENOMEM; | |
679 | goto out_free; | |
680 | } | |
681 | ||
d1c0b471 | 682 | chip_index = -1; |
5e95329b | 683 | for_each_available_child_of_node(np, child) { |
d1c0b471 | 684 | chip_index++; |
5e95329b FF |
685 | cd = &pd->chip[chip_index]; |
686 | ||
fa981d9a | 687 | cd->of_node = child; |
c1f570a6 | 688 | cd->host_dev = &mdio_bus->dev; |
5e95329b FF |
689 | |
690 | sw_addr = of_get_property(child, "reg", NULL); | |
691 | if (!sw_addr) | |
692 | continue; | |
693 | ||
694 | cd->sw_addr = be32_to_cpup(sw_addr); | |
c8cf89f7 | 695 | if (cd->sw_addr >= PHY_MAX_ADDR) |
5e95329b FF |
696 | continue; |
697 | ||
50d4964f | 698 | if (!of_property_read_u32(child, "eeprom-length", &eeprom_len)) |
6793abb4 GR |
699 | cd->eeprom_len = eeprom_len; |
700 | ||
6bc6d0a8 AL |
701 | mdio = of_parse_phandle(child, "mii-bus", 0); |
702 | if (mdio) { | |
703 | mdio_bus_switch = of_mdio_find_bus(mdio); | |
704 | if (!mdio_bus_switch) { | |
705 | ret = -EPROBE_DEFER; | |
706 | goto out_free_chip; | |
707 | } | |
708 | cd->host_dev = &mdio_bus_switch->dev; | |
709 | } | |
710 | ||
5e95329b FF |
711 | for_each_available_child_of_node(child, port) { |
712 | port_reg = of_get_property(port, "reg", NULL); | |
713 | if (!port_reg) | |
714 | continue; | |
715 | ||
716 | port_index = be32_to_cpup(port_reg); | |
8f5063e9 FF |
717 | if (port_index >= DSA_MAX_PORTS) |
718 | break; | |
5e95329b FF |
719 | |
720 | port_name = of_get_property(port, "label", NULL); | |
721 | if (!port_name) | |
722 | continue; | |
723 | ||
bd47497a FF |
724 | cd->port_dn[port_index] = port; |
725 | ||
5e95329b FF |
726 | cd->port_names[port_index] = kstrdup(port_name, |
727 | GFP_KERNEL); | |
728 | if (!cd->port_names[port_index]) { | |
729 | ret = -ENOMEM; | |
730 | goto out_free_chip; | |
731 | } | |
732 | ||
1e72e6f8 AL |
733 | ret = dsa_of_probe_links(pd, cd, chip_index, |
734 | port_index, port, port_name); | |
735 | if (ret) | |
736 | goto out_free_chip; | |
5e95329b | 737 | |
5e95329b FF |
738 | } |
739 | } | |
740 | ||
741 | return 0; | |
742 | ||
743 | out_free_chip: | |
21168245 | 744 | dsa_of_free_platform_data(pd); |
5e95329b FF |
745 | out_free: |
746 | kfree(pd); | |
f1a26a06 | 747 | dev->platform_data = NULL; |
5e95329b FF |
748 | return ret; |
749 | } | |
750 | ||
f1a26a06 | 751 | static void dsa_of_remove(struct device *dev) |
5e95329b | 752 | { |
f1a26a06 | 753 | struct dsa_platform_data *pd = dev->platform_data; |
5e95329b | 754 | |
f1a26a06 | 755 | if (!dev->of_node) |
5e95329b FF |
756 | return; |
757 | ||
21168245 | 758 | dsa_of_free_platform_data(pd); |
5e95329b FF |
759 | kfree(pd); |
760 | } | |
761 | #else | |
f1a26a06 | 762 | static inline int dsa_of_probe(struct device *dev) |
5e95329b FF |
763 | { |
764 | return 0; | |
765 | } | |
766 | ||
f1a26a06 | 767 | static inline void dsa_of_remove(struct device *dev) |
5e95329b FF |
768 | { |
769 | } | |
770 | #endif | |
771 | ||
c86e59b9 FF |
772 | static void dsa_setup_dst(struct dsa_switch_tree *dst, struct net_device *dev, |
773 | struct device *parent, struct dsa_platform_data *pd) | |
774 | { | |
775 | int i; | |
776 | ||
777 | dst->pd = pd; | |
778 | dst->master_netdev = dev; | |
779 | dst->cpu_switch = -1; | |
780 | dst->cpu_port = -1; | |
781 | ||
782 | for (i = 0; i < pd->nr_chips; i++) { | |
783 | struct dsa_switch *ds; | |
784 | ||
785 | ds = dsa_switch_setup(dst, i, parent, pd->chip[i].host_dev); | |
786 | if (IS_ERR(ds)) { | |
787 | netdev_err(dev, "[%d]: couldn't create dsa switch instance (error %ld)\n", | |
788 | i, PTR_ERR(ds)); | |
789 | continue; | |
790 | } | |
791 | ||
792 | dst->ds[i] = ds; | |
793 | if (ds->drv->poll_link != NULL) | |
794 | dst->link_poll_needed = 1; | |
795 | } | |
796 | ||
797 | /* | |
798 | * If we use a tagging format that doesn't have an ethertype | |
799 | * field, make sure that all packets from this point on get | |
800 | * sent to the tag format's receive function. | |
801 | */ | |
802 | wmb(); | |
803 | dev->dsa_ptr = (void *)dst; | |
804 | ||
805 | if (dst->link_poll_needed) { | |
806 | INIT_WORK(&dst->link_poll_work, dsa_link_poll_work); | |
807 | init_timer(&dst->link_poll_timer); | |
808 | dst->link_poll_timer.data = (unsigned long)dst; | |
809 | dst->link_poll_timer.function = dsa_link_poll_timer; | |
810 | dst->link_poll_timer.expires = round_jiffies(jiffies + HZ); | |
811 | add_timer(&dst->link_poll_timer); | |
812 | } | |
813 | } | |
814 | ||
91da11f8 LB |
815 | static int dsa_probe(struct platform_device *pdev) |
816 | { | |
91da11f8 LB |
817 | struct dsa_platform_data *pd = pdev->dev.platform_data; |
818 | struct net_device *dev; | |
e84665c9 | 819 | struct dsa_switch_tree *dst; |
c86e59b9 | 820 | int ret; |
91da11f8 | 821 | |
a2ae6007 JP |
822 | pr_notice_once("Distributed Switch Architecture driver version %s\n", |
823 | dsa_driver_version); | |
91da11f8 | 824 | |
5e95329b | 825 | if (pdev->dev.of_node) { |
f1a26a06 | 826 | ret = dsa_of_probe(&pdev->dev); |
5e95329b FF |
827 | if (ret) |
828 | return ret; | |
829 | ||
830 | pd = pdev->dev.platform_data; | |
831 | } | |
832 | ||
769a0202 | 833 | if (pd == NULL || (pd->netdev == NULL && pd->of_netdev == NULL)) |
91da11f8 LB |
834 | return -EINVAL; |
835 | ||
769a0202 FF |
836 | if (pd->of_netdev) { |
837 | dev = pd->of_netdev; | |
838 | dev_hold(dev); | |
839 | } else { | |
840 | dev = dev_to_net_device(pd->netdev); | |
841 | } | |
5e95329b | 842 | if (dev == NULL) { |
b324c07a | 843 | ret = -EPROBE_DEFER; |
5e95329b FF |
844 | goto out; |
845 | } | |
91da11f8 LB |
846 | |
847 | if (dev->dsa_ptr != NULL) { | |
848 | dev_put(dev); | |
5e95329b FF |
849 | ret = -EEXIST; |
850 | goto out; | |
91da11f8 LB |
851 | } |
852 | ||
e84665c9 LB |
853 | dst = kzalloc(sizeof(*dst), GFP_KERNEL); |
854 | if (dst == NULL) { | |
91da11f8 | 855 | dev_put(dev); |
5e95329b FF |
856 | ret = -ENOMEM; |
857 | goto out; | |
91da11f8 LB |
858 | } |
859 | ||
e84665c9 LB |
860 | platform_set_drvdata(pdev, dst); |
861 | ||
c86e59b9 | 862 | dsa_setup_dst(dst, dev, &pdev->dev, pd); |
91da11f8 LB |
863 | |
864 | return 0; | |
5e95329b FF |
865 | |
866 | out: | |
f1a26a06 | 867 | dsa_of_remove(&pdev->dev); |
5e95329b FF |
868 | |
869 | return ret; | |
91da11f8 LB |
870 | } |
871 | ||
c86e59b9 | 872 | static void dsa_remove_dst(struct dsa_switch_tree *dst) |
91da11f8 | 873 | { |
e84665c9 | 874 | int i; |
91da11f8 | 875 | |
e84665c9 LB |
876 | if (dst->link_poll_needed) |
877 | del_timer_sync(&dst->link_poll_timer); | |
91da11f8 | 878 | |
43829731 | 879 | flush_work(&dst->link_poll_work); |
91da11f8 | 880 | |
e84665c9 LB |
881 | for (i = 0; i < dst->pd->nr_chips; i++) { |
882 | struct dsa_switch *ds = dst->ds[i]; | |
883 | ||
884 | if (ds != NULL) | |
885 | dsa_switch_destroy(ds); | |
886 | } | |
c86e59b9 FF |
887 | } |
888 | ||
889 | static int dsa_remove(struct platform_device *pdev) | |
890 | { | |
891 | struct dsa_switch_tree *dst = platform_get_drvdata(pdev); | |
91da11f8 | 892 | |
c86e59b9 | 893 | dsa_remove_dst(dst); |
f1a26a06 | 894 | dsa_of_remove(&pdev->dev); |
5e95329b | 895 | |
91da11f8 LB |
896 | return 0; |
897 | } | |
898 | ||
899 | static void dsa_shutdown(struct platform_device *pdev) | |
900 | { | |
901 | } | |
902 | ||
3e8a72d1 FF |
903 | static int dsa_switch_rcv(struct sk_buff *skb, struct net_device *dev, |
904 | struct packet_type *pt, struct net_device *orig_dev) | |
905 | { | |
906 | struct dsa_switch_tree *dst = dev->dsa_ptr; | |
907 | ||
908 | if (unlikely(dst == NULL)) { | |
909 | kfree_skb(skb); | |
910 | return 0; | |
911 | } | |
912 | ||
5075314e | 913 | return dst->rcv(skb, dev, pt, orig_dev); |
3e8a72d1 FF |
914 | } |
915 | ||
61b7363f | 916 | static struct packet_type dsa_pack_type __read_mostly = { |
3e8a72d1 FF |
917 | .type = cpu_to_be16(ETH_P_XDSA), |
918 | .func = dsa_switch_rcv, | |
919 | }; | |
920 | ||
b73adef6 FF |
921 | static struct notifier_block dsa_netdevice_nb __read_mostly = { |
922 | .notifier_call = dsa_slave_netdevice_event, | |
923 | }; | |
924 | ||
24462549 FF |
925 | #ifdef CONFIG_PM_SLEEP |
926 | static int dsa_suspend(struct device *d) | |
927 | { | |
928 | struct platform_device *pdev = to_platform_device(d); | |
929 | struct dsa_switch_tree *dst = platform_get_drvdata(pdev); | |
930 | int i, ret = 0; | |
931 | ||
932 | for (i = 0; i < dst->pd->nr_chips; i++) { | |
933 | struct dsa_switch *ds = dst->ds[i]; | |
934 | ||
935 | if (ds != NULL) | |
936 | ret = dsa_switch_suspend(ds); | |
937 | } | |
938 | ||
939 | return ret; | |
940 | } | |
941 | ||
942 | static int dsa_resume(struct device *d) | |
943 | { | |
944 | struct platform_device *pdev = to_platform_device(d); | |
945 | struct dsa_switch_tree *dst = platform_get_drvdata(pdev); | |
946 | int i, ret = 0; | |
947 | ||
948 | for (i = 0; i < dst->pd->nr_chips; i++) { | |
949 | struct dsa_switch *ds = dst->ds[i]; | |
950 | ||
951 | if (ds != NULL) | |
952 | ret = dsa_switch_resume(ds); | |
953 | } | |
954 | ||
955 | return ret; | |
956 | } | |
957 | #endif | |
958 | ||
959 | static SIMPLE_DEV_PM_OPS(dsa_pm_ops, dsa_suspend, dsa_resume); | |
960 | ||
5e95329b | 961 | static const struct of_device_id dsa_of_match_table[] = { |
246d7f77 | 962 | { .compatible = "brcm,bcm7445-switch-v4.0" }, |
5e95329b FF |
963 | { .compatible = "marvell,dsa", }, |
964 | {} | |
965 | }; | |
966 | MODULE_DEVICE_TABLE(of, dsa_of_match_table); | |
967 | ||
91da11f8 LB |
968 | static struct platform_driver dsa_driver = { |
969 | .probe = dsa_probe, | |
970 | .remove = dsa_remove, | |
971 | .shutdown = dsa_shutdown, | |
972 | .driver = { | |
973 | .name = "dsa", | |
5e95329b | 974 | .of_match_table = dsa_of_match_table, |
24462549 | 975 | .pm = &dsa_pm_ops, |
91da11f8 LB |
976 | }, |
977 | }; | |
978 | ||
979 | static int __init dsa_init_module(void) | |
980 | { | |
7df899c3 BH |
981 | int rc; |
982 | ||
b73adef6 FF |
983 | register_netdevice_notifier(&dsa_netdevice_nb); |
984 | ||
7df899c3 BH |
985 | rc = platform_driver_register(&dsa_driver); |
986 | if (rc) | |
987 | return rc; | |
988 | ||
3e8a72d1 FF |
989 | dev_add_pack(&dsa_pack_type); |
990 | ||
7df899c3 | 991 | return 0; |
91da11f8 LB |
992 | } |
993 | module_init(dsa_init_module); | |
994 | ||
995 | static void __exit dsa_cleanup_module(void) | |
996 | { | |
b73adef6 | 997 | unregister_netdevice_notifier(&dsa_netdevice_nb); |
3e8a72d1 | 998 | dev_remove_pack(&dsa_pack_type); |
91da11f8 LB |
999 | platform_driver_unregister(&dsa_driver); |
1000 | } | |
1001 | module_exit(dsa_cleanup_module); | |
1002 | ||
577d6a7c | 1003 | MODULE_AUTHOR("Lennert Buytenhek <buytenh@wantstofly.org>"); |
91da11f8 LB |
1004 | MODULE_DESCRIPTION("Driver for Distributed Switch Architecture switch chips"); |
1005 | MODULE_LICENSE("GPL"); | |
1006 | MODULE_ALIAS("platform:dsa"); |