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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 | 12 | #include <linux/device.h> |
91da11f8 | 13 | #include <linux/list.h> |
91da11f8 | 14 | #include <linux/platform_device.h> |
5a0e3ad6 | 15 | #include <linux/slab.h> |
3a9a231d | 16 | #include <linux/module.h> |
91da11f8 | 17 | #include <net/dsa.h> |
5e95329b FF |
18 | #include <linux/of.h> |
19 | #include <linux/of_mdio.h> | |
20 | #include <linux/of_platform.h> | |
769a0202 | 21 | #include <linux/of_net.h> |
cc30c163 | 22 | #include <linux/of_gpio.h> |
51579c3f | 23 | #include <linux/sysfs.h> |
cbc5d90b | 24 | #include <linux/phy_fixed.h> |
85beabfe | 25 | #include <linux/gpio/consumer.h> |
91da11f8 LB |
26 | #include "dsa_priv.h" |
27 | ||
39a7f2a4 AL |
28 | static struct sk_buff *dsa_slave_notag_xmit(struct sk_buff *skb, |
29 | struct net_device *dev) | |
30 | { | |
31 | /* Just return the original SKB */ | |
32 | return skb; | |
33 | } | |
34 | ||
35 | static const struct dsa_device_ops none_ops = { | |
36 | .xmit = dsa_slave_notag_xmit, | |
37 | .rcv = NULL, | |
38 | }; | |
39 | ||
40 | const struct dsa_device_ops *dsa_device_ops[DSA_TAG_LAST] = { | |
41 | #ifdef CONFIG_NET_DSA_TAG_DSA | |
42 | [DSA_TAG_PROTO_DSA] = &dsa_netdev_ops, | |
43 | #endif | |
44 | #ifdef CONFIG_NET_DSA_TAG_EDSA | |
45 | [DSA_TAG_PROTO_EDSA] = &edsa_netdev_ops, | |
46 | #endif | |
47 | #ifdef CONFIG_NET_DSA_TAG_TRAILER | |
48 | [DSA_TAG_PROTO_TRAILER] = &trailer_netdev_ops, | |
49 | #endif | |
50 | #ifdef CONFIG_NET_DSA_TAG_BRCM | |
51 | [DSA_TAG_PROTO_BRCM] = &brcm_netdev_ops, | |
cafdc45c JC |
52 | #endif |
53 | #ifdef CONFIG_NET_DSA_TAG_QCA | |
54 | [DSA_TAG_PROTO_QCA] = &qca_netdev_ops, | |
39a7f2a4 AL |
55 | #endif |
56 | [DSA_TAG_PROTO_NONE] = &none_ops, | |
57 | }; | |
91da11f8 LB |
58 | |
59 | /* switch driver registration ***********************************************/ | |
60 | static DEFINE_MUTEX(dsa_switch_drivers_mutex); | |
61 | static LIST_HEAD(dsa_switch_drivers); | |
62 | ||
ab3d408d | 63 | void register_switch_driver(struct dsa_switch_driver *drv) |
91da11f8 LB |
64 | { |
65 | mutex_lock(&dsa_switch_drivers_mutex); | |
ab3d408d | 66 | list_add_tail(&drv->list, &dsa_switch_drivers); |
91da11f8 LB |
67 | mutex_unlock(&dsa_switch_drivers_mutex); |
68 | } | |
ad293b8a | 69 | EXPORT_SYMBOL_GPL(register_switch_driver); |
91da11f8 | 70 | |
ab3d408d | 71 | void unregister_switch_driver(struct dsa_switch_driver *drv) |
91da11f8 LB |
72 | { |
73 | mutex_lock(&dsa_switch_drivers_mutex); | |
ab3d408d | 74 | list_del_init(&drv->list); |
91da11f8 LB |
75 | mutex_unlock(&dsa_switch_drivers_mutex); |
76 | } | |
ad293b8a | 77 | EXPORT_SYMBOL_GPL(unregister_switch_driver); |
91da11f8 | 78 | |
a82f67af | 79 | static const struct dsa_switch_ops * |
bbb8d793 | 80 | dsa_switch_probe(struct device *parent, struct device *host_dev, int sw_addr, |
0209d144 | 81 | const char **_name, void **priv) |
91da11f8 | 82 | { |
a82f67af | 83 | const struct dsa_switch_ops *ret; |
91da11f8 | 84 | struct list_head *list; |
0209d144 | 85 | const char *name; |
91da11f8 LB |
86 | |
87 | ret = NULL; | |
88 | name = NULL; | |
89 | ||
90 | mutex_lock(&dsa_switch_drivers_mutex); | |
91 | list_for_each(list, &dsa_switch_drivers) { | |
a82f67af | 92 | const struct dsa_switch_ops *ops; |
ab3d408d | 93 | struct dsa_switch_driver *drv; |
91da11f8 | 94 | |
ab3d408d FF |
95 | drv = list_entry(list, struct dsa_switch_driver, list); |
96 | ops = drv->ops; | |
91da11f8 | 97 | |
9d490b4e | 98 | name = ops->probe(parent, host_dev, sw_addr, priv); |
91da11f8 | 99 | if (name != NULL) { |
9d490b4e | 100 | ret = ops; |
91da11f8 LB |
101 | break; |
102 | } | |
103 | } | |
104 | mutex_unlock(&dsa_switch_drivers_mutex); | |
105 | ||
106 | *_name = name; | |
107 | ||
108 | return ret; | |
109 | } | |
110 | ||
91da11f8 | 111 | /* basic switch operations **************************************************/ |
9b8e895c | 112 | int dsa_cpu_dsa_setup(struct dsa_switch *ds, struct device *dev, |
293784a8 | 113 | struct dsa_port *dport, int port) |
39b0c705 | 114 | { |
293784a8 | 115 | struct device_node *port_dn = dport->dn; |
39b0c705 | 116 | struct phy_device *phydev; |
9b8e895c AL |
117 | int ret, mode; |
118 | ||
119 | if (of_phy_is_fixed_link(port_dn)) { | |
120 | ret = of_phy_register_fixed_link(port_dn); | |
121 | if (ret) { | |
122 | dev_err(dev, "failed to register fixed PHY\n"); | |
123 | return ret; | |
124 | } | |
125 | phydev = of_phy_find_device(port_dn); | |
126 | ||
127 | mode = of_get_phy_mode(port_dn); | |
128 | if (mode < 0) | |
129 | mode = PHY_INTERFACE_MODE_NA; | |
130 | phydev->interface = mode; | |
131 | ||
132 | genphy_config_init(phydev); | |
133 | genphy_read_status(phydev); | |
9d490b4e VD |
134 | if (ds->ops->adjust_link) |
135 | ds->ops->adjust_link(ds, port, phydev); | |
fd05d7b1 JH |
136 | |
137 | put_device(&phydev->mdio.dev); | |
9b8e895c AL |
138 | } |
139 | ||
140 | return 0; | |
141 | } | |
142 | ||
143 | static int dsa_cpu_dsa_setups(struct dsa_switch *ds, struct device *dev) | |
144 | { | |
293784a8 | 145 | struct dsa_port *dport; |
9b8e895c | 146 | int ret, port; |
39b0c705 | 147 | |
26895e29 | 148 | for (port = 0; port < ds->num_ports; port++) { |
39b0c705 AL |
149 | if (!(dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port))) |
150 | continue; | |
151 | ||
293784a8 FF |
152 | dport = &ds->ports[port]; |
153 | ret = dsa_cpu_dsa_setup(ds, dev, dport, port); | |
9b8e895c AL |
154 | if (ret) |
155 | return ret; | |
39b0c705 AL |
156 | } |
157 | return 0; | |
158 | } | |
159 | ||
39a7f2a4 AL |
160 | const struct dsa_device_ops *dsa_resolve_tag_protocol(int tag_protocol) |
161 | { | |
162 | const struct dsa_device_ops *ops; | |
163 | ||
164 | if (tag_protocol >= DSA_TAG_LAST) | |
165 | return ERR_PTR(-EINVAL); | |
166 | ops = dsa_device_ops[tag_protocol]; | |
167 | ||
168 | if (!ops) | |
169 | return ERR_PTR(-ENOPROTOOPT); | |
170 | ||
171 | return ops; | |
172 | } | |
173 | ||
0c73c523 FF |
174 | int dsa_cpu_port_ethtool_setup(struct dsa_switch *ds) |
175 | { | |
176 | struct net_device *master; | |
177 | struct ethtool_ops *cpu_ops; | |
178 | ||
179 | master = ds->dst->master_netdev; | |
180 | if (ds->master_netdev) | |
181 | master = ds->master_netdev; | |
182 | ||
183 | cpu_ops = devm_kzalloc(ds->dev, sizeof(*cpu_ops), GFP_KERNEL); | |
184 | if (!cpu_ops) | |
185 | return -ENOMEM; | |
186 | ||
187 | memcpy(&ds->dst->master_ethtool_ops, master->ethtool_ops, | |
188 | sizeof(struct ethtool_ops)); | |
189 | ds->dst->master_orig_ethtool_ops = master->ethtool_ops; | |
190 | memcpy(cpu_ops, &ds->dst->master_ethtool_ops, | |
191 | sizeof(struct ethtool_ops)); | |
192 | dsa_cpu_port_ethtool_init(cpu_ops); | |
193 | master->ethtool_ops = cpu_ops; | |
194 | ||
195 | return 0; | |
196 | } | |
197 | ||
198 | void dsa_cpu_port_ethtool_restore(struct dsa_switch *ds) | |
199 | { | |
200 | struct net_device *master; | |
201 | ||
202 | master = ds->dst->master_netdev; | |
203 | if (ds->master_netdev) | |
204 | master = ds->master_netdev; | |
205 | ||
206 | master->ethtool_ops = ds->dst->master_orig_ethtool_ops; | |
207 | } | |
208 | ||
df197195 | 209 | static int dsa_switch_setup_one(struct dsa_switch *ds, struct device *parent) |
91da11f8 | 210 | { |
a82f67af | 211 | const struct dsa_switch_ops *ops = ds->ops; |
df197195 | 212 | struct dsa_switch_tree *dst = ds->dst; |
ff04955c | 213 | struct dsa_chip_data *cd = ds->cd; |
f9bf5a2c | 214 | bool valid_name_found = false; |
df197195 FF |
215 | int index = ds->index; |
216 | int i, ret; | |
91da11f8 LB |
217 | |
218 | /* | |
219 | * Validate supplied switch configuration. | |
220 | */ | |
26895e29 | 221 | for (i = 0; i < ds->num_ports; i++) { |
91da11f8 LB |
222 | char *name; |
223 | ||
ff04955c | 224 | name = cd->port_names[i]; |
91da11f8 LB |
225 | if (name == NULL) |
226 | continue; | |
227 | ||
228 | if (!strcmp(name, "cpu")) { | |
23e3d618 | 229 | if (dst->cpu_switch) { |
a2ae6007 JP |
230 | netdev_err(dst->master_netdev, |
231 | "multiple cpu ports?!\n"); | |
a896eee3 | 232 | return -EINVAL; |
91da11f8 | 233 | } |
b22de490 | 234 | dst->cpu_switch = ds; |
e84665c9 | 235 | dst->cpu_port = i; |
83c0afae | 236 | ds->cpu_port_mask |= 1 << i; |
e84665c9 LB |
237 | } else if (!strcmp(name, "dsa")) { |
238 | ds->dsa_port_mask |= 1 << i; | |
91da11f8 | 239 | } else { |
74c3e2a5 | 240 | ds->enabled_port_mask |= 1 << i; |
91da11f8 | 241 | } |
f9bf5a2c | 242 | valid_name_found = true; |
91da11f8 LB |
243 | } |
244 | ||
26895e29 | 245 | if (!valid_name_found && i == ds->num_ports) |
a896eee3 | 246 | return -EINVAL; |
91da11f8 | 247 | |
0d8bcdd3 FF |
248 | /* Make the built-in MII bus mask match the number of ports, |
249 | * switch drivers can override this later | |
250 | */ | |
74c3e2a5 | 251 | ds->phys_mii_mask = ds->enabled_port_mask; |
0d8bcdd3 | 252 | |
91da11f8 | 253 | /* |
e84665c9 LB |
254 | * If the CPU connects to this switch, set the switch tree |
255 | * tagging protocol to the preferred tagging format of this | |
256 | * switch. | |
91da11f8 | 257 | */ |
b22de490 | 258 | if (dst->cpu_switch == ds) { |
7b314362 AL |
259 | enum dsa_tag_protocol tag_protocol; |
260 | ||
9d490b4e | 261 | tag_protocol = ops->get_tag_protocol(ds); |
7b314362 | 262 | dst->tag_ops = dsa_resolve_tag_protocol(tag_protocol); |
a896eee3 VD |
263 | if (IS_ERR(dst->tag_ops)) |
264 | return PTR_ERR(dst->tag_ops); | |
91da11f8 | 265 | |
39a7f2a4 | 266 | dst->rcv = dst->tag_ops->rcv; |
5075314e | 267 | } |
91da11f8 | 268 | |
66472fc0 AL |
269 | memcpy(ds->rtable, cd->rtable, sizeof(ds->rtable)); |
270 | ||
91da11f8 LB |
271 | /* |
272 | * Do basic register setup. | |
273 | */ | |
9d490b4e | 274 | ret = ops->setup(ds); |
91da11f8 | 275 | if (ret < 0) |
a896eee3 | 276 | return ret; |
91da11f8 | 277 | |
092183df JC |
278 | if (ops->set_addr) { |
279 | ret = ops->set_addr(ds, dst->master_netdev->dev_addr); | |
280 | if (ret < 0) | |
a896eee3 | 281 | return ret; |
092183df | 282 | } |
91da11f8 | 283 | |
9d490b4e | 284 | if (!ds->slave_mii_bus && ops->phy_read) { |
e755e49e | 285 | ds->slave_mii_bus = devm_mdiobus_alloc(parent); |
a896eee3 VD |
286 | if (!ds->slave_mii_bus) |
287 | return -ENOMEM; | |
e755e49e | 288 | dsa_slave_mii_bus_init(ds); |
91da11f8 | 289 | |
e755e49e AL |
290 | ret = mdiobus_register(ds->slave_mii_bus); |
291 | if (ret < 0) | |
a896eee3 | 292 | return ret; |
e755e49e | 293 | } |
91da11f8 LB |
294 | |
295 | /* | |
296 | * Create network devices for physical switch ports. | |
297 | */ | |
26895e29 | 298 | for (i = 0; i < ds->num_ports; i++) { |
189b0d93 AL |
299 | ds->ports[i].dn = cd->port_dn[i]; |
300 | ||
74c3e2a5 | 301 | if (!(ds->enabled_port_mask & (1 << i))) |
91da11f8 LB |
302 | continue; |
303 | ||
ff04955c | 304 | ret = dsa_slave_create(ds, parent, i, cd->port_names[i]); |
a896eee3 | 305 | if (ret < 0) |
d25b8e74 | 306 | netdev_err(dst->master_netdev, "[%d]: can't create dsa slave device for port %d(%s): %d\n", |
ff04955c | 307 | index, i, cd->port_names[i], ret); |
91da11f8 LB |
308 | } |
309 | ||
39b0c705 | 310 | /* Perform configuration of the CPU and DSA ports */ |
9b8e895c | 311 | ret = dsa_cpu_dsa_setups(ds, parent); |
a896eee3 | 312 | if (ret < 0) |
39b0c705 AL |
313 | netdev_err(dst->master_netdev, "[%d] : can't configure CPU and DSA ports\n", |
314 | index); | |
39b0c705 | 315 | |
0c73c523 FF |
316 | ret = dsa_cpu_port_ethtool_setup(ds); |
317 | if (ret) | |
318 | return ret; | |
319 | ||
a896eee3 | 320 | return 0; |
df197195 FF |
321 | } |
322 | ||
323 | static struct dsa_switch * | |
324 | dsa_switch_setup(struct dsa_switch_tree *dst, int index, | |
325 | struct device *parent, struct device *host_dev) | |
326 | { | |
ff04955c | 327 | struct dsa_chip_data *cd = dst->pd->chip + index; |
a82f67af | 328 | const struct dsa_switch_ops *ops; |
df197195 FF |
329 | struct dsa_switch *ds; |
330 | int ret; | |
0209d144 | 331 | const char *name; |
7543a6d5 | 332 | void *priv; |
df197195 FF |
333 | |
334 | /* | |
335 | * Probe for switch model. | |
336 | */ | |
9d490b4e VD |
337 | ops = dsa_switch_probe(parent, host_dev, cd->sw_addr, &name, &priv); |
338 | if (!ops) { | |
df197195 FF |
339 | netdev_err(dst->master_netdev, "[%d]: could not detect attached switch\n", |
340 | index); | |
341 | return ERR_PTR(-EINVAL); | |
342 | } | |
343 | netdev_info(dst->master_netdev, "[%d]: detected a %s switch\n", | |
344 | index, name); | |
345 | ||
346 | ||
347 | /* | |
348 | * Allocate and initialise switch state. | |
349 | */ | |
a0c02161 VD |
350 | ds = dsa_switch_alloc(parent, DSA_MAX_PORTS); |
351 | if (!ds) | |
24595346 | 352 | return ERR_PTR(-ENOMEM); |
df197195 FF |
353 | |
354 | ds->dst = dst; | |
355 | ds->index = index; | |
ff04955c | 356 | ds->cd = cd; |
9d490b4e | 357 | ds->ops = ops; |
7543a6d5 | 358 | ds->priv = priv; |
df197195 FF |
359 | |
360 | ret = dsa_switch_setup_one(ds, parent); | |
361 | if (ret) | |
24595346 | 362 | return ERR_PTR(ret); |
df197195 FF |
363 | |
364 | return ds; | |
91da11f8 LB |
365 | } |
366 | ||
293784a8 | 367 | void dsa_cpu_dsa_destroy(struct dsa_port *port) |
91da11f8 | 368 | { |
293784a8 FF |
369 | struct device_node *port_dn = port->dn; |
370 | ||
3f65047c JH |
371 | if (of_phy_is_fixed_link(port_dn)) |
372 | of_phy_deregister_fixed_link(port_dn); | |
9b8e895c AL |
373 | } |
374 | ||
375 | static void dsa_switch_destroy(struct dsa_switch *ds) | |
376 | { | |
cbc5d90b NA |
377 | int port; |
378 | ||
3a44514f | 379 | /* Destroy network devices for physical switch ports. */ |
26895e29 | 380 | for (port = 0; port < ds->num_ports; port++) { |
74c3e2a5 | 381 | if (!(ds->enabled_port_mask & (1 << port))) |
3a44514f AL |
382 | continue; |
383 | ||
c8b09808 | 384 | if (!ds->ports[port].netdev) |
3a44514f AL |
385 | continue; |
386 | ||
c8b09808 | 387 | dsa_slave_destroy(ds->ports[port].netdev); |
3a44514f AL |
388 | } |
389 | ||
9b8e895c | 390 | /* Disable configuration of the CPU and DSA ports */ |
26895e29 | 391 | for (port = 0; port < ds->num_ports; port++) { |
9b8e895c AL |
392 | if (!(dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port))) |
393 | continue; | |
293784a8 | 394 | dsa_cpu_dsa_destroy(&ds->ports[port]); |
83c0afae AL |
395 | |
396 | /* Clearing a bit which is not set does no harm */ | |
397 | ds->cpu_port_mask |= ~(1 << port); | |
398 | ds->dsa_port_mask |= ~(1 << port); | |
cbc5d90b NA |
399 | } |
400 | ||
9d490b4e | 401 | if (ds->slave_mii_bus && ds->ops->phy_read) |
e755e49e | 402 | mdiobus_unregister(ds->slave_mii_bus); |
91da11f8 LB |
403 | } |
404 | ||
e506d405 | 405 | #ifdef CONFIG_PM_SLEEP |
ea825e70 | 406 | int dsa_switch_suspend(struct dsa_switch *ds) |
24462549 FF |
407 | { |
408 | int i, ret = 0; | |
409 | ||
410 | /* Suspend slave network devices */ | |
26895e29 | 411 | for (i = 0; i < ds->num_ports; i++) { |
d79d2107 | 412 | if (!dsa_is_port_initialized(ds, i)) |
24462549 FF |
413 | continue; |
414 | ||
c8b09808 | 415 | ret = dsa_slave_suspend(ds->ports[i].netdev); |
24462549 FF |
416 | if (ret) |
417 | return ret; | |
418 | } | |
419 | ||
9d490b4e VD |
420 | if (ds->ops->suspend) |
421 | ret = ds->ops->suspend(ds); | |
24462549 FF |
422 | |
423 | return ret; | |
424 | } | |
ea825e70 | 425 | EXPORT_SYMBOL_GPL(dsa_switch_suspend); |
24462549 | 426 | |
ea825e70 | 427 | int dsa_switch_resume(struct dsa_switch *ds) |
24462549 FF |
428 | { |
429 | int i, ret = 0; | |
430 | ||
9d490b4e VD |
431 | if (ds->ops->resume) |
432 | ret = ds->ops->resume(ds); | |
24462549 FF |
433 | |
434 | if (ret) | |
435 | return ret; | |
436 | ||
437 | /* Resume slave network devices */ | |
26895e29 | 438 | for (i = 0; i < ds->num_ports; i++) { |
d79d2107 | 439 | if (!dsa_is_port_initialized(ds, i)) |
24462549 FF |
440 | continue; |
441 | ||
c8b09808 | 442 | ret = dsa_slave_resume(ds->ports[i].netdev); |
24462549 FF |
443 | if (ret) |
444 | return ret; | |
445 | } | |
446 | ||
447 | return 0; | |
448 | } | |
ea825e70 | 449 | EXPORT_SYMBOL_GPL(dsa_switch_resume); |
e506d405 | 450 | #endif |
24462549 | 451 | |
91da11f8 LB |
452 | /* platform driver init and cleanup *****************************************/ |
453 | static int dev_is_class(struct device *dev, void *class) | |
454 | { | |
455 | if (dev->class != NULL && !strcmp(dev->class->name, class)) | |
456 | return 1; | |
457 | ||
458 | return 0; | |
459 | } | |
460 | ||
461 | static struct device *dev_find_class(struct device *parent, char *class) | |
462 | { | |
463 | if (dev_is_class(parent, class)) { | |
464 | get_device(parent); | |
465 | return parent; | |
466 | } | |
467 | ||
468 | return device_find_child(parent, class, dev_is_class); | |
469 | } | |
470 | ||
b4d2394d | 471 | struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev) |
91da11f8 LB |
472 | { |
473 | struct device *d; | |
474 | ||
475 | d = dev_find_class(dev, "mdio_bus"); | |
476 | if (d != NULL) { | |
477 | struct mii_bus *bus; | |
478 | ||
479 | bus = to_mii_bus(d); | |
480 | put_device(d); | |
481 | ||
482 | return bus; | |
483 | } | |
484 | ||
485 | return NULL; | |
486 | } | |
b4d2394d | 487 | EXPORT_SYMBOL_GPL(dsa_host_dev_to_mii_bus); |
91da11f8 LB |
488 | |
489 | static struct net_device *dev_to_net_device(struct device *dev) | |
490 | { | |
491 | struct device *d; | |
492 | ||
493 | d = dev_find_class(dev, "net"); | |
494 | if (d != NULL) { | |
495 | struct net_device *nd; | |
496 | ||
497 | nd = to_net_dev(d); | |
498 | dev_hold(nd); | |
499 | put_device(d); | |
500 | ||
501 | return nd; | |
502 | } | |
503 | ||
504 | return NULL; | |
505 | } | |
506 | ||
5e95329b FF |
507 | #ifdef CONFIG_OF |
508 | static int dsa_of_setup_routing_table(struct dsa_platform_data *pd, | |
509 | struct dsa_chip_data *cd, | |
30303813 | 510 | int chip_index, int port_index, |
5e95329b FF |
511 | struct device_node *link) |
512 | { | |
5e95329b | 513 | const __be32 *reg; |
5e95329b FF |
514 | int link_sw_addr; |
515 | struct device_node *parent_sw; | |
516 | int len; | |
517 | ||
518 | parent_sw = of_get_parent(link); | |
519 | if (!parent_sw) | |
520 | return -EINVAL; | |
521 | ||
522 | reg = of_get_property(parent_sw, "reg", &len); | |
523 | if (!reg || (len != sizeof(*reg) * 2)) | |
524 | return -EINVAL; | |
525 | ||
30303813 PN |
526 | /* |
527 | * Get the destination switch number from the second field of its 'reg' | |
528 | * property, i.e. for "reg = <0x19 1>" sw_addr is '1'. | |
529 | */ | |
5e95329b FF |
530 | link_sw_addr = be32_to_cpup(reg + 1); |
531 | ||
532 | if (link_sw_addr >= pd->nr_chips) | |
533 | return -EINVAL; | |
534 | ||
30303813 | 535 | cd->rtable[link_sw_addr] = port_index; |
5e95329b FF |
536 | |
537 | return 0; | |
5e95329b FF |
538 | } |
539 | ||
1e72e6f8 AL |
540 | static int dsa_of_probe_links(struct dsa_platform_data *pd, |
541 | struct dsa_chip_data *cd, | |
542 | int chip_index, int port_index, | |
543 | struct device_node *port, | |
544 | const char *port_name) | |
545 | { | |
546 | struct device_node *link; | |
547 | int link_index; | |
548 | int ret; | |
549 | ||
550 | for (link_index = 0;; link_index++) { | |
551 | link = of_parse_phandle(port, "link", link_index); | |
552 | if (!link) | |
553 | break; | |
554 | ||
555 | if (!strcmp(port_name, "dsa") && pd->nr_chips > 1) { | |
556 | ret = dsa_of_setup_routing_table(pd, cd, chip_index, | |
557 | port_index, link); | |
558 | if (ret) | |
559 | return ret; | |
560 | } | |
561 | } | |
562 | return 0; | |
563 | } | |
564 | ||
21168245 FF |
565 | static void dsa_of_free_platform_data(struct dsa_platform_data *pd) |
566 | { | |
567 | int i; | |
568 | int port_index; | |
569 | ||
570 | for (i = 0; i < pd->nr_chips; i++) { | |
571 | port_index = 0; | |
5f64a7db | 572 | while (port_index < DSA_MAX_PORTS) { |
1f74714f | 573 | kfree(pd->chip[i].port_names[port_index]); |
5f64a7db FF |
574 | port_index++; |
575 | } | |
e496ae69 RK |
576 | |
577 | /* Drop our reference to the MDIO bus device */ | |
578 | if (pd->chip[i].host_dev) | |
579 | put_device(pd->chip[i].host_dev); | |
21168245 FF |
580 | } |
581 | kfree(pd->chip); | |
582 | } | |
583 | ||
f1a26a06 | 584 | static int dsa_of_probe(struct device *dev) |
5e95329b | 585 | { |
f1a26a06 | 586 | struct device_node *np = dev->of_node; |
1e72e6f8 | 587 | struct device_node *child, *mdio, *ethernet, *port; |
6bc6d0a8 | 588 | struct mii_bus *mdio_bus, *mdio_bus_switch; |
769a0202 | 589 | struct net_device *ethernet_dev; |
5e95329b FF |
590 | struct dsa_platform_data *pd; |
591 | struct dsa_chip_data *cd; | |
592 | const char *port_name; | |
593 | int chip_index, port_index; | |
594 | const unsigned int *sw_addr, *port_reg; | |
6793abb4 | 595 | u32 eeprom_len; |
21168245 | 596 | int ret; |
5e95329b FF |
597 | |
598 | mdio = of_parse_phandle(np, "dsa,mii-bus", 0); | |
599 | if (!mdio) | |
600 | return -EINVAL; | |
601 | ||
602 | mdio_bus = of_mdio_find_bus(mdio); | |
603 | if (!mdio_bus) | |
b324c07a | 604 | return -EPROBE_DEFER; |
5e95329b FF |
605 | |
606 | ethernet = of_parse_phandle(np, "dsa,ethernet", 0); | |
e496ae69 RK |
607 | if (!ethernet) { |
608 | ret = -EINVAL; | |
609 | goto out_put_mdio; | |
610 | } | |
5e95329b | 611 | |
769a0202 | 612 | ethernet_dev = of_find_net_device_by_node(ethernet); |
e496ae69 RK |
613 | if (!ethernet_dev) { |
614 | ret = -EPROBE_DEFER; | |
615 | goto out_put_mdio; | |
616 | } | |
5e95329b FF |
617 | |
618 | pd = kzalloc(sizeof(*pd), GFP_KERNEL); | |
e496ae69 RK |
619 | if (!pd) { |
620 | ret = -ENOMEM; | |
9861f720 | 621 | goto out_put_ethernet; |
e496ae69 | 622 | } |
5e95329b | 623 | |
f1a26a06 | 624 | dev->platform_data = pd; |
769a0202 | 625 | pd->of_netdev = ethernet_dev; |
e04449fc | 626 | pd->nr_chips = of_get_available_child_count(np); |
5e95329b FF |
627 | if (pd->nr_chips > DSA_MAX_SWITCHES) |
628 | pd->nr_chips = DSA_MAX_SWITCHES; | |
629 | ||
6f2aed6a FF |
630 | pd->chip = kcalloc(pd->nr_chips, sizeof(struct dsa_chip_data), |
631 | GFP_KERNEL); | |
5e95329b FF |
632 | if (!pd->chip) { |
633 | ret = -ENOMEM; | |
634 | goto out_free; | |
635 | } | |
636 | ||
d1c0b471 | 637 | chip_index = -1; |
5e95329b | 638 | for_each_available_child_of_node(np, child) { |
d390238c VD |
639 | int i; |
640 | ||
d1c0b471 | 641 | chip_index++; |
5e95329b FF |
642 | cd = &pd->chip[chip_index]; |
643 | ||
fa981d9a | 644 | cd->of_node = child; |
e496ae69 | 645 | |
d390238c VD |
646 | /* Initialize the routing table */ |
647 | for (i = 0; i < DSA_MAX_SWITCHES; ++i) | |
648 | cd->rtable[i] = DSA_RTABLE_NONE; | |
649 | ||
e496ae69 RK |
650 | /* When assigning the host device, increment its refcount */ |
651 | cd->host_dev = get_device(&mdio_bus->dev); | |
5e95329b FF |
652 | |
653 | sw_addr = of_get_property(child, "reg", NULL); | |
654 | if (!sw_addr) | |
655 | continue; | |
656 | ||
657 | cd->sw_addr = be32_to_cpup(sw_addr); | |
c8cf89f7 | 658 | if (cd->sw_addr >= PHY_MAX_ADDR) |
5e95329b FF |
659 | continue; |
660 | ||
50d4964f | 661 | if (!of_property_read_u32(child, "eeprom-length", &eeprom_len)) |
6793abb4 GR |
662 | cd->eeprom_len = eeprom_len; |
663 | ||
6bc6d0a8 AL |
664 | mdio = of_parse_phandle(child, "mii-bus", 0); |
665 | if (mdio) { | |
666 | mdio_bus_switch = of_mdio_find_bus(mdio); | |
667 | if (!mdio_bus_switch) { | |
668 | ret = -EPROBE_DEFER; | |
669 | goto out_free_chip; | |
670 | } | |
e496ae69 RK |
671 | |
672 | /* Drop the mdio_bus device ref, replacing the host | |
673 | * device with the mdio_bus_switch device, keeping | |
674 | * the refcount from of_mdio_find_bus() above. | |
675 | */ | |
676 | put_device(cd->host_dev); | |
6bc6d0a8 AL |
677 | cd->host_dev = &mdio_bus_switch->dev; |
678 | } | |
679 | ||
5e95329b FF |
680 | for_each_available_child_of_node(child, port) { |
681 | port_reg = of_get_property(port, "reg", NULL); | |
682 | if (!port_reg) | |
683 | continue; | |
684 | ||
685 | port_index = be32_to_cpup(port_reg); | |
8f5063e9 FF |
686 | if (port_index >= DSA_MAX_PORTS) |
687 | break; | |
5e95329b FF |
688 | |
689 | port_name = of_get_property(port, "label", NULL); | |
690 | if (!port_name) | |
691 | continue; | |
692 | ||
bd47497a FF |
693 | cd->port_dn[port_index] = port; |
694 | ||
5e95329b FF |
695 | cd->port_names[port_index] = kstrdup(port_name, |
696 | GFP_KERNEL); | |
697 | if (!cd->port_names[port_index]) { | |
698 | ret = -ENOMEM; | |
699 | goto out_free_chip; | |
700 | } | |
701 | ||
1e72e6f8 AL |
702 | ret = dsa_of_probe_links(pd, cd, chip_index, |
703 | port_index, port, port_name); | |
704 | if (ret) | |
705 | goto out_free_chip; | |
5e95329b | 706 | |
5e95329b FF |
707 | } |
708 | } | |
709 | ||
e496ae69 RK |
710 | /* The individual chips hold their own refcount on the mdio bus, |
711 | * so drop ours */ | |
712 | put_device(&mdio_bus->dev); | |
713 | ||
5e95329b FF |
714 | return 0; |
715 | ||
716 | out_free_chip: | |
21168245 | 717 | dsa_of_free_platform_data(pd); |
5e95329b FF |
718 | out_free: |
719 | kfree(pd); | |
f1a26a06 | 720 | dev->platform_data = NULL; |
9861f720 RK |
721 | out_put_ethernet: |
722 | put_device(ðernet_dev->dev); | |
e496ae69 RK |
723 | out_put_mdio: |
724 | put_device(&mdio_bus->dev); | |
5e95329b FF |
725 | return ret; |
726 | } | |
727 | ||
f1a26a06 | 728 | static void dsa_of_remove(struct device *dev) |
5e95329b | 729 | { |
f1a26a06 | 730 | struct dsa_platform_data *pd = dev->platform_data; |
5e95329b | 731 | |
f1a26a06 | 732 | if (!dev->of_node) |
5e95329b FF |
733 | return; |
734 | ||
21168245 | 735 | dsa_of_free_platform_data(pd); |
9861f720 | 736 | put_device(&pd->of_netdev->dev); |
5e95329b FF |
737 | kfree(pd); |
738 | } | |
739 | #else | |
f1a26a06 | 740 | static inline int dsa_of_probe(struct device *dev) |
5e95329b FF |
741 | { |
742 | return 0; | |
743 | } | |
744 | ||
f1a26a06 | 745 | static inline void dsa_of_remove(struct device *dev) |
5e95329b FF |
746 | { |
747 | } | |
748 | #endif | |
749 | ||
4d7f3e75 NA |
750 | static int dsa_setup_dst(struct dsa_switch_tree *dst, struct net_device *dev, |
751 | struct device *parent, struct dsa_platform_data *pd) | |
c86e59b9 FF |
752 | { |
753 | int i; | |
4d7f3e75 | 754 | unsigned configured = 0; |
c86e59b9 FF |
755 | |
756 | dst->pd = pd; | |
757 | dst->master_netdev = dev; | |
c86e59b9 FF |
758 | dst->cpu_port = -1; |
759 | ||
760 | for (i = 0; i < pd->nr_chips; i++) { | |
761 | struct dsa_switch *ds; | |
762 | ||
763 | ds = dsa_switch_setup(dst, i, parent, pd->chip[i].host_dev); | |
764 | if (IS_ERR(ds)) { | |
765 | netdev_err(dev, "[%d]: couldn't create dsa switch instance (error %ld)\n", | |
766 | i, PTR_ERR(ds)); | |
767 | continue; | |
768 | } | |
769 | ||
770 | dst->ds[i] = ds; | |
4d7f3e75 NA |
771 | |
772 | ++configured; | |
c86e59b9 FF |
773 | } |
774 | ||
4d7f3e75 NA |
775 | /* |
776 | * If no switch was found, exit cleanly | |
777 | */ | |
778 | if (!configured) | |
779 | return -EPROBE_DEFER; | |
780 | ||
c86e59b9 FF |
781 | /* |
782 | * If we use a tagging format that doesn't have an ethertype | |
783 | * field, make sure that all packets from this point on get | |
784 | * sent to the tag format's receive function. | |
785 | */ | |
786 | wmb(); | |
787 | dev->dsa_ptr = (void *)dst; | |
788 | ||
4d7f3e75 | 789 | return 0; |
c86e59b9 FF |
790 | } |
791 | ||
91da11f8 LB |
792 | static int dsa_probe(struct platform_device *pdev) |
793 | { | |
91da11f8 LB |
794 | struct dsa_platform_data *pd = pdev->dev.platform_data; |
795 | struct net_device *dev; | |
e84665c9 | 796 | struct dsa_switch_tree *dst; |
c86e59b9 | 797 | int ret; |
91da11f8 | 798 | |
5e95329b | 799 | if (pdev->dev.of_node) { |
f1a26a06 | 800 | ret = dsa_of_probe(&pdev->dev); |
5e95329b FF |
801 | if (ret) |
802 | return ret; | |
803 | ||
804 | pd = pdev->dev.platform_data; | |
805 | } | |
806 | ||
769a0202 | 807 | if (pd == NULL || (pd->netdev == NULL && pd->of_netdev == NULL)) |
91da11f8 LB |
808 | return -EINVAL; |
809 | ||
769a0202 FF |
810 | if (pd->of_netdev) { |
811 | dev = pd->of_netdev; | |
812 | dev_hold(dev); | |
813 | } else { | |
814 | dev = dev_to_net_device(pd->netdev); | |
815 | } | |
5e95329b | 816 | if (dev == NULL) { |
b324c07a | 817 | ret = -EPROBE_DEFER; |
5e95329b FF |
818 | goto out; |
819 | } | |
91da11f8 LB |
820 | |
821 | if (dev->dsa_ptr != NULL) { | |
822 | dev_put(dev); | |
5e95329b FF |
823 | ret = -EEXIST; |
824 | goto out; | |
91da11f8 LB |
825 | } |
826 | ||
d4ac35d6 | 827 | dst = devm_kzalloc(&pdev->dev, sizeof(*dst), GFP_KERNEL); |
e84665c9 | 828 | if (dst == NULL) { |
91da11f8 | 829 | dev_put(dev); |
5e95329b FF |
830 | ret = -ENOMEM; |
831 | goto out; | |
91da11f8 LB |
832 | } |
833 | ||
e84665c9 LB |
834 | platform_set_drvdata(pdev, dst); |
835 | ||
4d7f3e75 | 836 | ret = dsa_setup_dst(dst, dev, &pdev->dev, pd); |
679fb46c NA |
837 | if (ret) { |
838 | dev_put(dev); | |
4d7f3e75 | 839 | goto out; |
679fb46c | 840 | } |
91da11f8 LB |
841 | |
842 | return 0; | |
5e95329b FF |
843 | |
844 | out: | |
f1a26a06 | 845 | dsa_of_remove(&pdev->dev); |
5e95329b FF |
846 | |
847 | return ret; | |
91da11f8 LB |
848 | } |
849 | ||
c86e59b9 | 850 | static void dsa_remove_dst(struct dsa_switch_tree *dst) |
91da11f8 | 851 | { |
e84665c9 | 852 | int i; |
91da11f8 | 853 | |
04761890 NA |
854 | dst->master_netdev->dsa_ptr = NULL; |
855 | ||
856 | /* If we used a tagging format that doesn't have an ethertype | |
857 | * field, make sure that all packets from this point get sent | |
858 | * without the tag and go through the regular receive path. | |
859 | */ | |
860 | wmb(); | |
861 | ||
e84665c9 LB |
862 | for (i = 0; i < dst->pd->nr_chips; i++) { |
863 | struct dsa_switch *ds = dst->ds[i]; | |
864 | ||
d4ac35d6 | 865 | if (ds) |
e84665c9 LB |
866 | dsa_switch_destroy(ds); |
867 | } | |
679fb46c | 868 | |
9520ed8f | 869 | dsa_cpu_port_ethtool_restore(dst->cpu_switch); |
0c73c523 | 870 | |
679fb46c | 871 | dev_put(dst->master_netdev); |
c86e59b9 FF |
872 | } |
873 | ||
874 | static int dsa_remove(struct platform_device *pdev) | |
875 | { | |
876 | struct dsa_switch_tree *dst = platform_get_drvdata(pdev); | |
91da11f8 | 877 | |
c86e59b9 | 878 | dsa_remove_dst(dst); |
f1a26a06 | 879 | dsa_of_remove(&pdev->dev); |
5e95329b | 880 | |
91da11f8 LB |
881 | return 0; |
882 | } | |
883 | ||
884 | static void dsa_shutdown(struct platform_device *pdev) | |
885 | { | |
886 | } | |
887 | ||
3e8a72d1 FF |
888 | static int dsa_switch_rcv(struct sk_buff *skb, struct net_device *dev, |
889 | struct packet_type *pt, struct net_device *orig_dev) | |
890 | { | |
891 | struct dsa_switch_tree *dst = dev->dsa_ptr; | |
892 | ||
893 | if (unlikely(dst == NULL)) { | |
894 | kfree_skb(skb); | |
895 | return 0; | |
896 | } | |
897 | ||
5075314e | 898 | return dst->rcv(skb, dev, pt, orig_dev); |
3e8a72d1 FF |
899 | } |
900 | ||
61b7363f | 901 | static struct packet_type dsa_pack_type __read_mostly = { |
3e8a72d1 FF |
902 | .type = cpu_to_be16(ETH_P_XDSA), |
903 | .func = dsa_switch_rcv, | |
904 | }; | |
905 | ||
b73adef6 FF |
906 | static struct notifier_block dsa_netdevice_nb __read_mostly = { |
907 | .notifier_call = dsa_slave_netdevice_event, | |
908 | }; | |
909 | ||
24462549 FF |
910 | #ifdef CONFIG_PM_SLEEP |
911 | static int dsa_suspend(struct device *d) | |
912 | { | |
913 | struct platform_device *pdev = to_platform_device(d); | |
914 | struct dsa_switch_tree *dst = platform_get_drvdata(pdev); | |
915 | int i, ret = 0; | |
916 | ||
917 | for (i = 0; i < dst->pd->nr_chips; i++) { | |
918 | struct dsa_switch *ds = dst->ds[i]; | |
919 | ||
920 | if (ds != NULL) | |
921 | ret = dsa_switch_suspend(ds); | |
922 | } | |
923 | ||
924 | return ret; | |
925 | } | |
926 | ||
927 | static int dsa_resume(struct device *d) | |
928 | { | |
929 | struct platform_device *pdev = to_platform_device(d); | |
930 | struct dsa_switch_tree *dst = platform_get_drvdata(pdev); | |
931 | int i, ret = 0; | |
932 | ||
933 | for (i = 0; i < dst->pd->nr_chips; i++) { | |
934 | struct dsa_switch *ds = dst->ds[i]; | |
935 | ||
936 | if (ds != NULL) | |
937 | ret = dsa_switch_resume(ds); | |
938 | } | |
939 | ||
940 | return ret; | |
941 | } | |
942 | #endif | |
943 | ||
944 | static SIMPLE_DEV_PM_OPS(dsa_pm_ops, dsa_suspend, dsa_resume); | |
945 | ||
5e95329b FF |
946 | static const struct of_device_id dsa_of_match_table[] = { |
947 | { .compatible = "marvell,dsa", }, | |
948 | {} | |
949 | }; | |
950 | MODULE_DEVICE_TABLE(of, dsa_of_match_table); | |
951 | ||
91da11f8 LB |
952 | static struct platform_driver dsa_driver = { |
953 | .probe = dsa_probe, | |
954 | .remove = dsa_remove, | |
955 | .shutdown = dsa_shutdown, | |
956 | .driver = { | |
957 | .name = "dsa", | |
5e95329b | 958 | .of_match_table = dsa_of_match_table, |
24462549 | 959 | .pm = &dsa_pm_ops, |
91da11f8 LB |
960 | }, |
961 | }; | |
962 | ||
963 | static int __init dsa_init_module(void) | |
964 | { | |
7df899c3 BH |
965 | int rc; |
966 | ||
b73adef6 FF |
967 | register_netdevice_notifier(&dsa_netdevice_nb); |
968 | ||
7df899c3 BH |
969 | rc = platform_driver_register(&dsa_driver); |
970 | if (rc) | |
971 | return rc; | |
972 | ||
3e8a72d1 FF |
973 | dev_add_pack(&dsa_pack_type); |
974 | ||
7df899c3 | 975 | return 0; |
91da11f8 LB |
976 | } |
977 | module_init(dsa_init_module); | |
978 | ||
979 | static void __exit dsa_cleanup_module(void) | |
980 | { | |
b73adef6 | 981 | unregister_netdevice_notifier(&dsa_netdevice_nb); |
3e8a72d1 | 982 | dev_remove_pack(&dsa_pack_type); |
91da11f8 LB |
983 | platform_driver_unregister(&dsa_driver); |
984 | } | |
985 | module_exit(dsa_cleanup_module); | |
986 | ||
577d6a7c | 987 | MODULE_AUTHOR("Lennert Buytenhek <buytenh@wantstofly.org>"); |
91da11f8 LB |
988 | MODULE_DESCRIPTION("Driver for Distributed Switch Architecture switch chips"); |
989 | MODULE_LICENSE("GPL"); | |
990 | MODULE_ALIAS("platform:dsa"); |