Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * scan.c - support for transforming the ACPI namespace into individual objects | |
3 | */ | |
4 | ||
5 | #include <linux/module.h> | |
6 | #include <linux/init.h> | |
5a0e3ad6 | 7 | #include <linux/slab.h> |
9b6d97b6 | 8 | #include <linux/kernel.h> |
1da177e4 | 9 | #include <linux/acpi.h> |
74523c90 AK |
10 | #include <linux/signal.h> |
11 | #include <linux/kthread.h> | |
222e82ac | 12 | #include <linux/dmi.h> |
d1efe3c3 | 13 | #include <linux/nls.h> |
d0562674 | 14 | #include <linux/dma-mapping.h> |
1da177e4 | 15 | |
d783156e RW |
16 | #include <asm/pgtable.h> |
17 | ||
e60cc7a6 BH |
18 | #include "internal.h" |
19 | ||
1da177e4 | 20 | #define _COMPONENT ACPI_BUS_COMPONENT |
f52fd66d | 21 | ACPI_MODULE_NAME("scan"); |
4be44fcd | 22 | extern struct acpi_device *acpi_root; |
1da177e4 LT |
23 | |
24 | #define ACPI_BUS_CLASS "system_bus" | |
29b71a1c | 25 | #define ACPI_BUS_HID "LNXSYBUS" |
1da177e4 LT |
26 | #define ACPI_BUS_DEVICE_NAME "System Bus" |
27 | ||
859ac9a4 BH |
28 | #define ACPI_IS_ROOT_DEVICE(device) (!(device)->parent) |
29 | ||
d783156e RW |
30 | #define INVALID_ACPI_HANDLE ((acpi_handle)empty_zero_page) |
31 | ||
683058e3 RW |
32 | /* |
33 | * If set, devices will be hot-removed even if they cannot be put offline | |
34 | * gracefully (from the kernel's standpoint). | |
35 | */ | |
36 | bool acpi_force_hot_remove; | |
37 | ||
620e112c | 38 | static const char *dummy_hid = "device"; |
2b2ae7c7 | 39 | |
40e7fcb1 LT |
40 | static LIST_HEAD(acpi_dep_list); |
41 | static DEFINE_MUTEX(acpi_dep_list_lock); | |
2d12b6b3 | 42 | LIST_HEAD(acpi_bus_id_list); |
c511cc19 | 43 | static DEFINE_MUTEX(acpi_scan_lock); |
ca589f94 | 44 | static LIST_HEAD(acpi_scan_handlers_list); |
9090589d | 45 | DEFINE_MUTEX(acpi_device_lock); |
1da177e4 | 46 | LIST_HEAD(acpi_wakeup_device_list); |
e525506f | 47 | static DEFINE_MUTEX(acpi_hp_context_lock); |
1da177e4 | 48 | |
40e7fcb1 LT |
49 | struct acpi_dep_data { |
50 | struct list_head node; | |
51 | acpi_handle master; | |
52 | acpi_handle slave; | |
53 | }; | |
54 | ||
3757b948 RW |
55 | void acpi_scan_lock_acquire(void) |
56 | { | |
57 | mutex_lock(&acpi_scan_lock); | |
58 | } | |
59 | EXPORT_SYMBOL_GPL(acpi_scan_lock_acquire); | |
60 | ||
61 | void acpi_scan_lock_release(void) | |
62 | { | |
63 | mutex_unlock(&acpi_scan_lock); | |
64 | } | |
65 | EXPORT_SYMBOL_GPL(acpi_scan_lock_release); | |
66 | ||
e525506f RW |
67 | void acpi_lock_hp_context(void) |
68 | { | |
69 | mutex_lock(&acpi_hp_context_lock); | |
70 | } | |
71 | ||
72 | void acpi_unlock_hp_context(void) | |
73 | { | |
74 | mutex_unlock(&acpi_hp_context_lock); | |
75 | } | |
76 | ||
5d513205 RW |
77 | void acpi_initialize_hp_context(struct acpi_device *adev, |
78 | struct acpi_hotplug_context *hp, | |
79 | int (*notify)(struct acpi_device *, u32), | |
80 | void (*uevent)(struct acpi_device *, u32)) | |
81 | { | |
82 | acpi_lock_hp_context(); | |
ba574dc8 RW |
83 | hp->notify = notify; |
84 | hp->uevent = uevent; | |
85 | acpi_set_hp_context(adev, hp); | |
5d513205 RW |
86 | acpi_unlock_hp_context(); |
87 | } | |
88 | EXPORT_SYMBOL_GPL(acpi_initialize_hp_context); | |
89 | ||
ca589f94 RW |
90 | int acpi_scan_add_handler(struct acpi_scan_handler *handler) |
91 | { | |
d34afa9d | 92 | if (!handler) |
ca589f94 RW |
93 | return -EINVAL; |
94 | ||
95 | list_add_tail(&handler->list_node, &acpi_scan_handlers_list); | |
96 | return 0; | |
97 | } | |
98 | ||
3f8055c3 RW |
99 | int acpi_scan_add_handler_with_hotplug(struct acpi_scan_handler *handler, |
100 | const char *hotplug_profile_name) | |
101 | { | |
102 | int error; | |
103 | ||
104 | error = acpi_scan_add_handler(handler); | |
105 | if (error) | |
106 | return error; | |
107 | ||
108 | acpi_sysfs_add_hotplug_profile(&handler->hotplug, hotplug_profile_name); | |
109 | return 0; | |
110 | } | |
111 | ||
caa73ea1 | 112 | bool acpi_scan_is_offline(struct acpi_device *adev, bool uevent) |
d22ddcbc RW |
113 | { |
114 | struct acpi_device_physical_node *pn; | |
115 | bool offline = true; | |
116 | ||
4c533c80 RW |
117 | /* |
118 | * acpi_container_offline() calls this for all of the container's | |
119 | * children under the container's physical_node_lock lock. | |
120 | */ | |
121 | mutex_lock_nested(&adev->physical_node_lock, SINGLE_DEPTH_NESTING); | |
d22ddcbc RW |
122 | |
123 | list_for_each_entry(pn, &adev->physical_node_list, node) | |
124 | if (device_supports_offline(pn->dev) && !pn->dev->offline) { | |
caa73ea1 RW |
125 | if (uevent) |
126 | kobject_uevent(&pn->dev->kobj, KOBJ_CHANGE); | |
127 | ||
d22ddcbc RW |
128 | offline = false; |
129 | break; | |
130 | } | |
131 | ||
132 | mutex_unlock(&adev->physical_node_lock); | |
133 | return offline; | |
134 | } | |
135 | ||
7f28ddec RW |
136 | static acpi_status acpi_bus_offline(acpi_handle handle, u32 lvl, void *data, |
137 | void **ret_p) | |
683058e3 RW |
138 | { |
139 | struct acpi_device *device = NULL; | |
140 | struct acpi_device_physical_node *pn; | |
303bfdb1 | 141 | bool second_pass = (bool)data; |
683058e3 RW |
142 | acpi_status status = AE_OK; |
143 | ||
144 | if (acpi_bus_get_device(handle, &device)) | |
145 | return AE_OK; | |
146 | ||
7f28ddec RW |
147 | if (device->handler && !device->handler->hotplug.enabled) { |
148 | *ret_p = &device->dev; | |
149 | return AE_SUPPORT; | |
150 | } | |
151 | ||
683058e3 RW |
152 | mutex_lock(&device->physical_node_lock); |
153 | ||
154 | list_for_each_entry(pn, &device->physical_node_list, node) { | |
155 | int ret; | |
156 | ||
303bfdb1 RW |
157 | if (second_pass) { |
158 | /* Skip devices offlined by the first pass. */ | |
159 | if (pn->put_online) | |
160 | continue; | |
161 | } else { | |
162 | pn->put_online = false; | |
163 | } | |
683058e3 RW |
164 | ret = device_offline(pn->dev); |
165 | if (acpi_force_hot_remove) | |
166 | continue; | |
167 | ||
303bfdb1 RW |
168 | if (ret >= 0) { |
169 | pn->put_online = !ret; | |
170 | } else { | |
171 | *ret_p = pn->dev; | |
172 | if (second_pass) { | |
173 | status = AE_ERROR; | |
174 | break; | |
175 | } | |
683058e3 | 176 | } |
683058e3 RW |
177 | } |
178 | ||
179 | mutex_unlock(&device->physical_node_lock); | |
180 | ||
181 | return status; | |
182 | } | |
183 | ||
7f28ddec RW |
184 | static acpi_status acpi_bus_online(acpi_handle handle, u32 lvl, void *data, |
185 | void **ret_p) | |
683058e3 RW |
186 | { |
187 | struct acpi_device *device = NULL; | |
188 | struct acpi_device_physical_node *pn; | |
189 | ||
190 | if (acpi_bus_get_device(handle, &device)) | |
191 | return AE_OK; | |
192 | ||
193 | mutex_lock(&device->physical_node_lock); | |
194 | ||
195 | list_for_each_entry(pn, &device->physical_node_list, node) | |
196 | if (pn->put_online) { | |
197 | device_online(pn->dev); | |
198 | pn->put_online = false; | |
199 | } | |
200 | ||
201 | mutex_unlock(&device->physical_node_lock); | |
202 | ||
203 | return AE_OK; | |
204 | } | |
205 | ||
d22ddcbc | 206 | static int acpi_scan_try_to_offline(struct acpi_device *device) |
1da177e4 | 207 | { |
5993c467 | 208 | acpi_handle handle = device->handle; |
d22ddcbc | 209 | struct device *errdev = NULL; |
a33ec399 | 210 | acpi_status status; |
f058cdf4 | 211 | |
303bfdb1 RW |
212 | /* |
213 | * Carry out two passes here and ignore errors in the first pass, | |
214 | * because if the devices in question are memory blocks and | |
215 | * CONFIG_MEMCG is set, one of the blocks may hold data structures | |
216 | * that the other blocks depend on, but it is not known in advance which | |
217 | * block holds them. | |
218 | * | |
219 | * If the first pass is successful, the second one isn't needed, though. | |
220 | */ | |
7f28ddec RW |
221 | status = acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
222 | NULL, acpi_bus_offline, (void *)false, | |
223 | (void **)&errdev); | |
224 | if (status == AE_SUPPORT) { | |
225 | dev_warn(errdev, "Offline disabled.\n"); | |
226 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, | |
227 | acpi_bus_online, NULL, NULL, NULL); | |
7f28ddec RW |
228 | return -EPERM; |
229 | } | |
230 | acpi_bus_offline(handle, 0, (void *)false, (void **)&errdev); | |
303bfdb1 RW |
231 | if (errdev) { |
232 | errdev = NULL; | |
683058e3 | 233 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
7f28ddec RW |
234 | NULL, acpi_bus_offline, (void *)true, |
235 | (void **)&errdev); | |
303bfdb1 | 236 | if (!errdev || acpi_force_hot_remove) |
7f28ddec RW |
237 | acpi_bus_offline(handle, 0, (void *)true, |
238 | (void **)&errdev); | |
303bfdb1 RW |
239 | |
240 | if (errdev && !acpi_force_hot_remove) { | |
241 | dev_warn(errdev, "Offline failed.\n"); | |
7f28ddec | 242 | acpi_bus_online(handle, 0, NULL, NULL); |
303bfdb1 | 243 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, |
7f28ddec RW |
244 | ACPI_UINT32_MAX, acpi_bus_online, |
245 | NULL, NULL, NULL); | |
303bfdb1 RW |
246 | return -EBUSY; |
247 | } | |
683058e3 | 248 | } |
d22ddcbc RW |
249 | return 0; |
250 | } | |
251 | ||
252 | static int acpi_scan_hot_remove(struct acpi_device *device) | |
253 | { | |
254 | acpi_handle handle = device->handle; | |
255 | unsigned long long sta; | |
256 | acpi_status status; | |
257 | ||
dee15926 TC |
258 | if (device->handler && device->handler->hotplug.demand_offline |
259 | && !acpi_force_hot_remove) { | |
caa73ea1 | 260 | if (!acpi_scan_is_offline(device, true)) |
d22ddcbc RW |
261 | return -EBUSY; |
262 | } else { | |
263 | int error = acpi_scan_try_to_offline(device); | |
264 | if (error) | |
265 | return error; | |
266 | } | |
683058e3 | 267 | |
26d46867 | 268 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
0794469d | 269 | "Hot-removing device %s...\n", dev_name(&device->dev))); |
26d46867 | 270 | |
bfee26db | 271 | acpi_bus_trim(device); |
683058e3 | 272 | |
7d2421f8 | 273 | acpi_evaluate_lck(handle, 0); |
1da177e4 LT |
274 | /* |
275 | * TBD: _EJD support. | |
276 | */ | |
7d2421f8 JL |
277 | status = acpi_evaluate_ej0(handle); |
278 | if (status == AE_NOT_FOUND) | |
279 | return -ENODEV; | |
280 | else if (ACPI_FAILURE(status)) | |
281 | return -EIO; | |
1da177e4 | 282 | |
882fd12e TK |
283 | /* |
284 | * Verify if eject was indeed successful. If not, log an error | |
285 | * message. No need to call _OST since _EJ0 call was made OK. | |
286 | */ | |
287 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); | |
288 | if (ACPI_FAILURE(status)) { | |
289 | acpi_handle_warn(handle, | |
290 | "Status check after eject failed (0x%x)\n", status); | |
291 | } else if (sta & ACPI_STA_DEVICE_ENABLED) { | |
292 | acpi_handle_warn(handle, | |
293 | "Eject incomplete - status 0x%llx\n", sta); | |
294 | } | |
295 | ||
a33ec399 RW |
296 | return 0; |
297 | } | |
1da177e4 | 298 | |
443fc820 RW |
299 | static int acpi_scan_device_not_present(struct acpi_device *adev) |
300 | { | |
301 | if (!acpi_device_enumerated(adev)) { | |
302 | dev_warn(&adev->dev, "Still not present\n"); | |
303 | return -EALREADY; | |
304 | } | |
305 | acpi_bus_trim(adev); | |
306 | return 0; | |
307 | } | |
308 | ||
c27b2c33 | 309 | static int acpi_scan_device_check(struct acpi_device *adev) |
a33ec399 | 310 | { |
f943db40 | 311 | int error; |
a33ec399 | 312 | |
443fc820 RW |
313 | acpi_bus_get_status(adev); |
314 | if (adev->status.present || adev->status.functional) { | |
315 | /* | |
316 | * This function is only called for device objects for which | |
317 | * matching scan handlers exist. The only situation in which | |
318 | * the scan handler is not attached to this device object yet | |
319 | * is when the device has just appeared (either it wasn't | |
320 | * present at all before or it was removed and then added | |
321 | * again). | |
322 | */ | |
323 | if (adev->handler) { | |
324 | dev_warn(&adev->dev, "Already enumerated\n"); | |
325 | return -EALREADY; | |
326 | } | |
327 | error = acpi_bus_scan(adev->handle); | |
328 | if (error) { | |
329 | dev_warn(&adev->dev, "Namespace scan failure\n"); | |
330 | return error; | |
331 | } | |
332 | if (!adev->handler) { | |
333 | dev_warn(&adev->dev, "Enumeration failure\n"); | |
334 | error = -ENODEV; | |
335 | } | |
336 | } else { | |
337 | error = acpi_scan_device_not_present(adev); | |
338 | } | |
339 | return error; | |
340 | } | |
341 | ||
342 | static int acpi_scan_bus_check(struct acpi_device *adev) | |
343 | { | |
344 | struct acpi_scan_handler *handler = adev->handler; | |
345 | struct acpi_device *child; | |
346 | int error; | |
347 | ||
348 | acpi_bus_get_status(adev); | |
349 | if (!(adev->status.present || adev->status.functional)) { | |
350 | acpi_scan_device_not_present(adev); | |
351 | return 0; | |
352 | } | |
353 | if (handler && handler->hotplug.scan_dependent) | |
354 | return handler->hotplug.scan_dependent(adev); | |
355 | ||
c27b2c33 RW |
356 | error = acpi_bus_scan(adev->handle); |
357 | if (error) { | |
358 | dev_warn(&adev->dev, "Namespace scan failure\n"); | |
359 | return error; | |
360 | } | |
443fc820 RW |
361 | list_for_each_entry(child, &adev->children, node) { |
362 | error = acpi_scan_bus_check(child); | |
363 | if (error) | |
364 | return error; | |
c27b2c33 RW |
365 | } |
366 | return 0; | |
a33ec399 RW |
367 | } |
368 | ||
3c2cc7ff RW |
369 | static int acpi_generic_hotplug_event(struct acpi_device *adev, u32 type) |
370 | { | |
371 | switch (type) { | |
372 | case ACPI_NOTIFY_BUS_CHECK: | |
373 | return acpi_scan_bus_check(adev); | |
374 | case ACPI_NOTIFY_DEVICE_CHECK: | |
375 | return acpi_scan_device_check(adev); | |
376 | case ACPI_NOTIFY_EJECT_REQUEST: | |
377 | case ACPI_OST_EC_OSPM_EJECT: | |
dd2151be RW |
378 | if (adev->handler && !adev->handler->hotplug.enabled) { |
379 | dev_info(&adev->dev, "Eject disabled\n"); | |
380 | return -EPERM; | |
381 | } | |
700b8422 RW |
382 | acpi_evaluate_ost(adev->handle, ACPI_NOTIFY_EJECT_REQUEST, |
383 | ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); | |
3c2cc7ff RW |
384 | return acpi_scan_hot_remove(adev); |
385 | } | |
386 | return -EINVAL; | |
387 | } | |
388 | ||
1e3bcb59 | 389 | void acpi_device_hotplug(struct acpi_device *adev, u32 src) |
a33ec399 | 390 | { |
a33ec399 | 391 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; |
3c2cc7ff | 392 | int error = -ENODEV; |
a33ec399 | 393 | |
683058e3 | 394 | lock_device_hotplug(); |
e0ae8fee | 395 | mutex_lock(&acpi_scan_lock); |
a33ec399 | 396 | |
c27b2c33 RW |
397 | /* |
398 | * The device object's ACPI handle cannot become invalid as long as we | |
3c2cc7ff | 399 | * are holding acpi_scan_lock, but it might have become invalid before |
c27b2c33 RW |
400 | * that lock was acquired. |
401 | */ | |
402 | if (adev->handle == INVALID_ACPI_HANDLE) | |
3c2cc7ff | 403 | goto err_out; |
c27b2c33 | 404 | |
1e2380cd RW |
405 | if (adev->flags.is_dock_station) { |
406 | error = dock_notify(adev, src); | |
407 | } else if (adev->flags.hotplug_notify) { | |
3c2cc7ff | 408 | error = acpi_generic_hotplug_event(adev, src); |
dd2151be RW |
409 | if (error == -EPERM) { |
410 | ost_code = ACPI_OST_SC_EJECT_NOT_SUPPORTED; | |
411 | goto err_out; | |
412 | } | |
3c2cc7ff | 413 | } else { |
be27b3dc | 414 | int (*notify)(struct acpi_device *, u32); |
3c2cc7ff RW |
415 | |
416 | acpi_lock_hp_context(); | |
be27b3dc | 417 | notify = adev->hp ? adev->hp->notify : NULL; |
3c2cc7ff RW |
418 | acpi_unlock_hp_context(); |
419 | /* | |
420 | * There may be additional notify handlers for device objects | |
421 | * without the .event() callback, so ignore them here. | |
422 | */ | |
be27b3dc RW |
423 | if (notify) |
424 | error = notify(adev, src); | |
3c2cc7ff RW |
425 | else |
426 | goto out; | |
a33ec399 | 427 | } |
c27b2c33 RW |
428 | if (!error) |
429 | ost_code = ACPI_OST_SC_SUCCESS; | |
a33ec399 | 430 | |
3c2cc7ff | 431 | err_out: |
700b8422 | 432 | acpi_evaluate_ost(adev->handle, src, ost_code, NULL); |
3c2cc7ff RW |
433 | |
434 | out: | |
78ea4639 | 435 | acpi_bus_put_acpi_device(adev); |
a33ec399 | 436 | mutex_unlock(&acpi_scan_lock); |
e0ae8fee | 437 | unlock_device_hotplug(); |
a33ec399 RW |
438 | } |
439 | ||
0b224527 RW |
440 | static void acpi_free_power_resources_lists(struct acpi_device *device) |
441 | { | |
442 | int i; | |
443 | ||
993cbe59 RW |
444 | if (device->wakeup.flags.valid) |
445 | acpi_power_resources_list_free(&device->wakeup.resources); | |
446 | ||
1b1f3e16 | 447 | if (!device->power.flags.power_resources) |
0b224527 RW |
448 | return; |
449 | ||
450 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) { | |
451 | struct acpi_device_power_state *ps = &device->power.states[i]; | |
452 | acpi_power_resources_list_free(&ps->resources); | |
453 | } | |
7f47fa6c BH |
454 | } |
455 | ||
1890a97a | 456 | static void acpi_device_release(struct device *dev) |
1da177e4 | 457 | { |
1890a97a | 458 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1da177e4 | 459 | |
ffdcd955 | 460 | acpi_free_properties(acpi_dev); |
c0af4175 | 461 | acpi_free_pnp_ids(&acpi_dev->pnp); |
0b224527 | 462 | acpi_free_power_resources_lists(acpi_dev); |
1890a97a | 463 | kfree(acpi_dev); |
1da177e4 LT |
464 | } |
465 | ||
d783156e RW |
466 | static void acpi_device_del(struct acpi_device *device) |
467 | { | |
ca9dc8d4 LW |
468 | struct acpi_device_bus_id *acpi_device_bus_id; |
469 | ||
d783156e RW |
470 | mutex_lock(&acpi_device_lock); |
471 | if (device->parent) | |
472 | list_del(&device->node); | |
473 | ||
ca9dc8d4 LW |
474 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) |
475 | if (!strcmp(acpi_device_bus_id->bus_id, | |
476 | acpi_device_hid(device))) { | |
477 | if (acpi_device_bus_id->instance_no > 0) | |
478 | acpi_device_bus_id->instance_no--; | |
479 | else { | |
480 | list_del(&acpi_device_bus_id->node); | |
481 | kfree(acpi_device_bus_id); | |
482 | } | |
483 | break; | |
484 | } | |
485 | ||
d783156e RW |
486 | list_del(&device->wakeup_list); |
487 | mutex_unlock(&acpi_device_lock); | |
488 | ||
489 | acpi_power_add_remove_device(device, false); | |
490 | acpi_device_remove_files(device); | |
491 | if (device->remove) | |
492 | device->remove(device); | |
493 | ||
494 | device_del(&device->dev); | |
495 | } | |
496 | ||
497 | static LIST_HEAD(acpi_device_del_list); | |
498 | static DEFINE_MUTEX(acpi_device_del_lock); | |
499 | ||
500 | static void acpi_device_del_work_fn(struct work_struct *work_not_used) | |
501 | { | |
502 | for (;;) { | |
503 | struct acpi_device *adev; | |
504 | ||
505 | mutex_lock(&acpi_device_del_lock); | |
506 | ||
507 | if (list_empty(&acpi_device_del_list)) { | |
508 | mutex_unlock(&acpi_device_del_lock); | |
509 | break; | |
510 | } | |
511 | adev = list_first_entry(&acpi_device_del_list, | |
512 | struct acpi_device, del_list); | |
513 | list_del(&adev->del_list); | |
514 | ||
515 | mutex_unlock(&acpi_device_del_lock); | |
516 | ||
517 | acpi_device_del(adev); | |
518 | /* | |
519 | * Drop references to all power resources that might have been | |
520 | * used by the device. | |
521 | */ | |
522 | acpi_power_transition(adev, ACPI_STATE_D3_COLD); | |
523 | put_device(&adev->dev); | |
524 | } | |
525 | } | |
526 | ||
527 | /** | |
528 | * acpi_scan_drop_device - Drop an ACPI device object. | |
529 | * @handle: Handle of an ACPI namespace node, not used. | |
530 | * @context: Address of the ACPI device object to drop. | |
531 | * | |
532 | * This is invoked by acpi_ns_delete_node() during the removal of the ACPI | |
533 | * namespace node the device object pointed to by @context is attached to. | |
534 | * | |
535 | * The unregistration is carried out asynchronously to avoid running | |
536 | * acpi_device_del() under the ACPICA's namespace mutex and the list is used to | |
537 | * ensure the correct ordering (the device objects must be unregistered in the | |
538 | * same order in which the corresponding namespace nodes are deleted). | |
539 | */ | |
540 | static void acpi_scan_drop_device(acpi_handle handle, void *context) | |
caf5c03f | 541 | { |
d783156e RW |
542 | static DECLARE_WORK(work, acpi_device_del_work_fn); |
543 | struct acpi_device *adev = context; | |
544 | ||
545 | mutex_lock(&acpi_device_del_lock); | |
546 | ||
547 | /* | |
548 | * Use the ACPI hotplug workqueue which is ordered, so this work item | |
549 | * won't run after any hotplug work items submitted subsequently. That | |
550 | * prevents attempts to register device objects identical to those being | |
551 | * deleted from happening concurrently (such attempts result from | |
552 | * hotplug events handled via the ACPI hotplug workqueue). It also will | |
553 | * run after all of the work items submitted previosuly, which helps | |
554 | * those work items to ensure that they are not accessing stale device | |
555 | * objects. | |
556 | */ | |
557 | if (list_empty(&acpi_device_del_list)) | |
558 | acpi_queue_hotplug_work(&work); | |
559 | ||
560 | list_add_tail(&adev->del_list, &acpi_device_del_list); | |
561 | /* Make acpi_ns_validate_handle() return NULL for this handle. */ | |
562 | adev->handle = INVALID_ACPI_HANDLE; | |
563 | ||
564 | mutex_unlock(&acpi_device_del_lock); | |
caf5c03f RW |
565 | } |
566 | ||
78ea4639 RW |
567 | static int acpi_get_device_data(acpi_handle handle, struct acpi_device **device, |
568 | void (*callback)(void *)) | |
caf5c03f RW |
569 | { |
570 | acpi_status status; | |
571 | ||
572 | if (!device) | |
573 | return -EINVAL; | |
574 | ||
78ea4639 RW |
575 | status = acpi_get_data_full(handle, acpi_scan_drop_device, |
576 | (void **)device, callback); | |
caf5c03f RW |
577 | if (ACPI_FAILURE(status) || !*device) { |
578 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", | |
579 | handle)); | |
580 | return -ENODEV; | |
581 | } | |
582 | return 0; | |
583 | } | |
78ea4639 RW |
584 | |
585 | int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device) | |
586 | { | |
587 | return acpi_get_device_data(handle, device, NULL); | |
588 | } | |
6585925b | 589 | EXPORT_SYMBOL(acpi_bus_get_device); |
caf5c03f | 590 | |
78ea4639 RW |
591 | static void get_acpi_device(void *dev) |
592 | { | |
593 | if (dev) | |
594 | get_device(&((struct acpi_device *)dev)->dev); | |
595 | } | |
596 | ||
597 | struct acpi_device *acpi_bus_get_acpi_device(acpi_handle handle) | |
598 | { | |
599 | struct acpi_device *adev = NULL; | |
600 | ||
601 | acpi_get_device_data(handle, &adev, get_acpi_device); | |
602 | return adev; | |
603 | } | |
604 | ||
605 | void acpi_bus_put_acpi_device(struct acpi_device *adev) | |
606 | { | |
607 | put_device(&adev->dev); | |
608 | } | |
609 | ||
cf860be6 RW |
610 | int acpi_device_add(struct acpi_device *device, |
611 | void (*release)(struct device *)) | |
1da177e4 | 612 | { |
4be44fcd | 613 | int result; |
e49bd2dd ZR |
614 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; |
615 | int found = 0; | |
66b7ed40 | 616 | |
d43e167d RW |
617 | if (device->handle) { |
618 | acpi_status status; | |
619 | ||
d783156e | 620 | status = acpi_attach_data(device->handle, acpi_scan_drop_device, |
d43e167d RW |
621 | device); |
622 | if (ACPI_FAILURE(status)) { | |
623 | acpi_handle_err(device->handle, | |
624 | "Unable to attach device data\n"); | |
625 | return -ENODEV; | |
626 | } | |
627 | } | |
628 | ||
9e89dde2 ZR |
629 | /* |
630 | * Linkage | |
631 | * ------- | |
632 | * Link this device to its parent and siblings. | |
633 | */ | |
634 | INIT_LIST_HEAD(&device->children); | |
635 | INIT_LIST_HEAD(&device->node); | |
9e89dde2 | 636 | INIT_LIST_HEAD(&device->wakeup_list); |
1033f904 | 637 | INIT_LIST_HEAD(&device->physical_node_list); |
d783156e | 638 | INIT_LIST_HEAD(&device->del_list); |
1033f904 | 639 | mutex_init(&device->physical_node_lock); |
1da177e4 | 640 | |
e49bd2dd ZR |
641 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
642 | if (!new_bus_id) { | |
d43e167d RW |
643 | pr_err(PREFIX "Memory allocation error\n"); |
644 | result = -ENOMEM; | |
645 | goto err_detach; | |
1da177e4 | 646 | } |
e49bd2dd | 647 | |
9090589d | 648 | mutex_lock(&acpi_device_lock); |
e49bd2dd ZR |
649 | /* |
650 | * Find suitable bus_id and instance number in acpi_bus_id_list | |
651 | * If failed, create one and link it into acpi_bus_id_list | |
652 | */ | |
653 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) { | |
1131b938 BH |
654 | if (!strcmp(acpi_device_bus_id->bus_id, |
655 | acpi_device_hid(device))) { | |
656 | acpi_device_bus_id->instance_no++; | |
e49bd2dd ZR |
657 | found = 1; |
658 | kfree(new_bus_id); | |
659 | break; | |
660 | } | |
1da177e4 | 661 | } |
0c526d96 | 662 | if (!found) { |
e49bd2dd | 663 | acpi_device_bus_id = new_bus_id; |
1131b938 | 664 | strcpy(acpi_device_bus_id->bus_id, acpi_device_hid(device)); |
e49bd2dd ZR |
665 | acpi_device_bus_id->instance_no = 0; |
666 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); | |
1da177e4 | 667 | } |
0794469d | 668 | dev_set_name(&device->dev, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no); |
1da177e4 | 669 | |
33b57150 | 670 | if (device->parent) |
9e89dde2 | 671 | list_add_tail(&device->node, &device->parent->children); |
33b57150 | 672 | |
9e89dde2 ZR |
673 | if (device->wakeup.flags.valid) |
674 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); | |
9090589d | 675 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 676 | |
1890a97a | 677 | if (device->parent) |
66b7ed40 | 678 | device->dev.parent = &device->parent->dev; |
1890a97a | 679 | device->dev.bus = &acpi_bus_type; |
82c7d5ef | 680 | device->dev.release = release; |
cf860be6 | 681 | result = device_add(&device->dev); |
0c526d96 | 682 | if (result) { |
8b12b922 | 683 | dev_err(&device->dev, "Error registering device\n"); |
d43e167d | 684 | goto err; |
1da177e4 | 685 | } |
1da177e4 | 686 | |
e49bd2dd | 687 | result = acpi_device_setup_files(device); |
0c526d96 | 688 | if (result) |
0794469d KS |
689 | printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n", |
690 | dev_name(&device->dev)); | |
1da177e4 | 691 | |
1da177e4 | 692 | return 0; |
d43e167d RW |
693 | |
694 | err: | |
9090589d | 695 | mutex_lock(&acpi_device_lock); |
33b57150 | 696 | if (device->parent) |
e49bd2dd | 697 | list_del(&device->node); |
e49bd2dd | 698 | list_del(&device->wakeup_list); |
9090589d | 699 | mutex_unlock(&acpi_device_lock); |
d43e167d RW |
700 | |
701 | err_detach: | |
d783156e | 702 | acpi_detach_data(device->handle, acpi_scan_drop_device); |
e49bd2dd | 703 | return result; |
1da177e4 LT |
704 | } |
705 | ||
9e89dde2 ZR |
706 | /* -------------------------------------------------------------------------- |
707 | Device Enumeration | |
708 | -------------------------------------------------------------------------- */ | |
5c478f49 BH |
709 | static struct acpi_device *acpi_bus_get_parent(acpi_handle handle) |
710 | { | |
456de893 | 711 | struct acpi_device *device = NULL; |
5c478f49 | 712 | acpi_status status; |
5c478f49 BH |
713 | |
714 | /* | |
715 | * Fixed hardware devices do not appear in the namespace and do not | |
716 | * have handles, but we fabricate acpi_devices for them, so we have | |
717 | * to deal with them specially. | |
718 | */ | |
456de893 | 719 | if (!handle) |
5c478f49 BH |
720 | return acpi_root; |
721 | ||
722 | do { | |
723 | status = acpi_get_parent(handle, &handle); | |
5c478f49 | 724 | if (ACPI_FAILURE(status)) |
456de893 RW |
725 | return status == AE_NULL_ENTRY ? NULL : acpi_root; |
726 | } while (acpi_bus_get_device(handle, &device)); | |
727 | return device; | |
5c478f49 BH |
728 | } |
729 | ||
9e89dde2 ZR |
730 | acpi_status |
731 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) | |
732 | { | |
733 | acpi_status status; | |
734 | acpi_handle tmp; | |
735 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
736 | union acpi_object *obj; | |
737 | ||
738 | status = acpi_get_handle(handle, "_EJD", &tmp); | |
739 | if (ACPI_FAILURE(status)) | |
740 | return status; | |
741 | ||
742 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); | |
743 | if (ACPI_SUCCESS(status)) { | |
744 | obj = buffer.pointer; | |
3b5fee59 HM |
745 | status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer, |
746 | ejd); | |
9e89dde2 ZR |
747 | kfree(buffer.pointer); |
748 | } | |
749 | return status; | |
750 | } | |
751 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); | |
752 | ||
e88c9c60 RW |
753 | static int acpi_bus_extract_wakeup_device_power_package(acpi_handle handle, |
754 | struct acpi_device_wakeup *wakeup) | |
9e89dde2 | 755 | { |
b581a7f9 RW |
756 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
757 | union acpi_object *package = NULL; | |
9e89dde2 | 758 | union acpi_object *element = NULL; |
b581a7f9 | 759 | acpi_status status; |
e88c9c60 | 760 | int err = -ENODATA; |
9e89dde2 | 761 | |
b581a7f9 | 762 | if (!wakeup) |
e88c9c60 | 763 | return -EINVAL; |
9e89dde2 | 764 | |
993cbe59 | 765 | INIT_LIST_HEAD(&wakeup->resources); |
9e89dde2 | 766 | |
b581a7f9 RW |
767 | /* _PRW */ |
768 | status = acpi_evaluate_object(handle, "_PRW", NULL, &buffer); | |
769 | if (ACPI_FAILURE(status)) { | |
770 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); | |
e88c9c60 | 771 | return err; |
b581a7f9 RW |
772 | } |
773 | ||
774 | package = (union acpi_object *)buffer.pointer; | |
775 | ||
e88c9c60 | 776 | if (!package || package->package.count < 2) |
b581a7f9 | 777 | goto out; |
b581a7f9 | 778 | |
9e89dde2 | 779 | element = &(package->package.elements[0]); |
e88c9c60 | 780 | if (!element) |
b581a7f9 | 781 | goto out; |
e88c9c60 | 782 | |
9e89dde2 ZR |
783 | if (element->type == ACPI_TYPE_PACKAGE) { |
784 | if ((element->package.count < 2) || | |
785 | (element->package.elements[0].type != | |
786 | ACPI_TYPE_LOCAL_REFERENCE) | |
e88c9c60 | 787 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) |
b581a7f9 | 788 | goto out; |
e88c9c60 | 789 | |
b581a7f9 | 790 | wakeup->gpe_device = |
9e89dde2 | 791 | element->package.elements[0].reference.handle; |
b581a7f9 | 792 | wakeup->gpe_number = |
9e89dde2 ZR |
793 | (u32) element->package.elements[1].integer.value; |
794 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
b581a7f9 RW |
795 | wakeup->gpe_device = NULL; |
796 | wakeup->gpe_number = element->integer.value; | |
797 | } else { | |
b581a7f9 RW |
798 | goto out; |
799 | } | |
9e89dde2 ZR |
800 | |
801 | element = &(package->package.elements[1]); | |
e88c9c60 | 802 | if (element->type != ACPI_TYPE_INTEGER) |
b581a7f9 | 803 | goto out; |
e88c9c60 | 804 | |
b581a7f9 | 805 | wakeup->sleep_state = element->integer.value; |
9e89dde2 | 806 | |
e88c9c60 RW |
807 | err = acpi_extract_power_resources(package, 2, &wakeup->resources); |
808 | if (err) | |
b581a7f9 | 809 | goto out; |
9e89dde2 | 810 | |
0596a52b RW |
811 | if (!list_empty(&wakeup->resources)) { |
812 | int sleep_state; | |
9e89dde2 | 813 | |
b5d667eb RW |
814 | err = acpi_power_wakeup_list_init(&wakeup->resources, |
815 | &sleep_state); | |
816 | if (err) { | |
817 | acpi_handle_warn(handle, "Retrieving current states " | |
818 | "of wakeup power resources failed\n"); | |
819 | acpi_power_resources_list_free(&wakeup->resources); | |
820 | goto out; | |
821 | } | |
0596a52b RW |
822 | if (sleep_state < wakeup->sleep_state) { |
823 | acpi_handle_warn(handle, "Overriding _PRW sleep state " | |
824 | "(S%d) by S%d from power resources\n", | |
825 | (int)wakeup->sleep_state, sleep_state); | |
826 | wakeup->sleep_state = sleep_state; | |
827 | } | |
828 | } | |
9874647b | 829 | |
b581a7f9 RW |
830 | out: |
831 | kfree(buffer.pointer); | |
e88c9c60 | 832 | return err; |
1da177e4 LT |
833 | } |
834 | ||
bd9b2f9a | 835 | static void acpi_wakeup_gpe_init(struct acpi_device *device) |
1da177e4 | 836 | { |
0519ade7 | 837 | static const struct acpi_device_id button_device_ids[] = { |
29b71a1c | 838 | {"PNP0C0C", 0}, |
b7e38304 | 839 | {"PNP0C0D", 0}, |
29b71a1c TR |
840 | {"PNP0C0E", 0}, |
841 | {"", 0}, | |
842 | }; | |
bd9b2f9a | 843 | struct acpi_device_wakeup *wakeup = &device->wakeup; |
f517709d RW |
844 | acpi_status status; |
845 | acpi_event_status event_status; | |
846 | ||
bd9b2f9a | 847 | wakeup->flags.notifier_present = 0; |
f517709d RW |
848 | |
849 | /* Power button, Lid switch always enable wakeup */ | |
850 | if (!acpi_match_device_ids(device, button_device_ids)) { | |
bd9b2f9a | 851 | wakeup->flags.run_wake = 1; |
b7e38304 ZR |
852 | if (!acpi_match_device_ids(device, &button_device_ids[1])) { |
853 | /* Do not use Lid/sleep button for S5 wakeup */ | |
bd9b2f9a RW |
854 | if (wakeup->sleep_state == ACPI_STATE_S5) |
855 | wakeup->sleep_state = ACPI_STATE_S4; | |
b7e38304 | 856 | } |
bd9b2f9a | 857 | acpi_mark_gpe_for_wake(wakeup->gpe_device, wakeup->gpe_number); |
f2b56bc8 | 858 | device_set_wakeup_capable(&device->dev, true); |
f517709d RW |
859 | return; |
860 | } | |
861 | ||
bd9b2f9a RW |
862 | acpi_setup_gpe_for_wake(device->handle, wakeup->gpe_device, |
863 | wakeup->gpe_number); | |
864 | status = acpi_get_gpe_status(wakeup->gpe_device, wakeup->gpe_number, | |
865 | &event_status); | |
866 | if (ACPI_FAILURE(status)) | |
867 | return; | |
868 | ||
2f857234 | 869 | wakeup->flags.run_wake = !!(event_status & ACPI_EVENT_FLAG_HAS_HANDLER); |
f517709d RW |
870 | } |
871 | ||
d57d09a4 | 872 | static void acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
f517709d | 873 | { |
e88c9c60 | 874 | int err; |
29b71a1c | 875 | |
d57d09a4 | 876 | /* Presence of _PRW indicates wake capable */ |
952c63e9 | 877 | if (!acpi_has_method(device->handle, "_PRW")) |
d57d09a4 RW |
878 | return; |
879 | ||
e88c9c60 RW |
880 | err = acpi_bus_extract_wakeup_device_power_package(device->handle, |
881 | &device->wakeup); | |
882 | if (err) { | |
883 | dev_err(&device->dev, "_PRW evaluation error: %d\n", err); | |
d57d09a4 | 884 | return; |
9e89dde2 | 885 | } |
1da177e4 | 886 | |
9e89dde2 | 887 | device->wakeup.flags.valid = 1; |
9b83ccd2 | 888 | device->wakeup.prepare_count = 0; |
bd9b2f9a | 889 | acpi_wakeup_gpe_init(device); |
729b2bdb ZY |
890 | /* Call _PSW/_DSW object to disable its ability to wake the sleeping |
891 | * system for the ACPI device with the _PRW object. | |
892 | * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW. | |
893 | * So it is necessary to call _DSW object first. Only when it is not | |
894 | * present will the _PSW object used. | |
895 | */ | |
e88c9c60 RW |
896 | err = acpi_device_sleep_wake(device, 0, 0, 0); |
897 | if (err) | |
77e76609 RW |
898 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
899 | "error in _DSW or _PSW evaluation\n")); | |
1da177e4 | 900 | } |
1da177e4 | 901 | |
f33ce568 RW |
902 | static void acpi_bus_init_power_state(struct acpi_device *device, int state) |
903 | { | |
904 | struct acpi_device_power_state *ps = &device->power.states[state]; | |
ef85bdbe RW |
905 | char pathname[5] = { '_', 'P', 'R', '0' + state, '\0' }; |
906 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
f33ce568 | 907 | acpi_status status; |
bf325f95 | 908 | |
f33ce568 RW |
909 | INIT_LIST_HEAD(&ps->resources); |
910 | ||
ef85bdbe RW |
911 | /* Evaluate "_PRx" to get referenced power resources */ |
912 | status = acpi_evaluate_object(device->handle, pathname, NULL, &buffer); | |
913 | if (ACPI_SUCCESS(status)) { | |
914 | union acpi_object *package = buffer.pointer; | |
915 | ||
916 | if (buffer.length && package | |
917 | && package->type == ACPI_TYPE_PACKAGE | |
918 | && package->package.count) { | |
e88c9c60 RW |
919 | int err = acpi_extract_power_resources(package, 0, |
920 | &ps->resources); | |
921 | if (!err) | |
ef85bdbe | 922 | device->power.flags.power_resources = 1; |
f33ce568 | 923 | } |
ef85bdbe | 924 | ACPI_FREE(buffer.pointer); |
f33ce568 RW |
925 | } |
926 | ||
927 | /* Evaluate "_PSx" to see if we can do explicit sets */ | |
ef85bdbe | 928 | pathname[2] = 'S'; |
952c63e9 | 929 | if (acpi_has_method(device->handle, pathname)) |
f33ce568 RW |
930 | ps->flags.explicit_set = 1; |
931 | ||
20dacb71 RW |
932 | /* State is valid if there are means to put the device into it. */ |
933 | if (!list_empty(&ps->resources) || ps->flags.explicit_set) | |
f33ce568 | 934 | ps->flags.valid = 1; |
f33ce568 RW |
935 | |
936 | ps->power = -1; /* Unknown - driver assigned */ | |
937 | ps->latency = -1; /* Unknown - driver assigned */ | |
938 | } | |
939 | ||
d43e167d | 940 | static void acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 941 | { |
8bc5053b | 942 | u32 i; |
1a365616 | 943 | |
d43e167d | 944 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ |
952c63e9 JL |
945 | if (!acpi_has_method(device->handle, "_PS0") && |
946 | !acpi_has_method(device->handle, "_PR0")) | |
947 | return; | |
1a365616 | 948 | |
d43e167d | 949 | device->flags.power_manageable = 1; |
4be44fcd | 950 | |
9e89dde2 ZR |
951 | /* |
952 | * Power Management Flags | |
953 | */ | |
952c63e9 | 954 | if (acpi_has_method(device->handle, "_PSC")) |
9e89dde2 | 955 | device->power.flags.explicit_get = 1; |
f25c0ae2 | 956 | |
952c63e9 | 957 | if (acpi_has_method(device->handle, "_IRC")) |
9e89dde2 | 958 | device->power.flags.inrush_current = 1; |
1da177e4 | 959 | |
f25c0ae2 RW |
960 | if (acpi_has_method(device->handle, "_DSW")) |
961 | device->power.flags.dsw_present = 1; | |
962 | ||
9e89dde2 ZR |
963 | /* |
964 | * Enumerate supported power management states | |
965 | */ | |
f33ce568 RW |
966 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) |
967 | acpi_bus_init_power_state(device, i); | |
bf325f95 | 968 | |
0b224527 | 969 | INIT_LIST_HEAD(&device->power.states[ACPI_STATE_D3_COLD].resources); |
20dacb71 RW |
970 | if (!list_empty(&device->power.states[ACPI_STATE_D3_HOT].resources)) |
971 | device->power.states[ACPI_STATE_D3_COLD].flags.valid = 1; | |
1da177e4 | 972 | |
20dacb71 | 973 | /* Set defaults for D0 and D3hot states (always valid) */ |
9e89dde2 ZR |
974 | device->power.states[ACPI_STATE_D0].flags.valid = 1; |
975 | device->power.states[ACPI_STATE_D0].power = 100; | |
20dacb71 | 976 | device->power.states[ACPI_STATE_D3_HOT].flags.valid = 1; |
1399dfcd | 977 | |
1b1f3e16 | 978 | if (acpi_bus_init_power(device)) |
b3785492 | 979 | device->flags.power_manageable = 0; |
9e89dde2 | 980 | } |
c8f7a62c | 981 | |
d43e167d | 982 | static void acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 983 | { |
1da177e4 | 984 | /* Presence of _STA indicates 'dynamic_status' */ |
952c63e9 | 985 | if (acpi_has_method(device->handle, "_STA")) |
1da177e4 LT |
986 | device->flags.dynamic_status = 1; |
987 | ||
1da177e4 | 988 | /* Presence of _RMV indicates 'removable' */ |
952c63e9 | 989 | if (acpi_has_method(device->handle, "_RMV")) |
1da177e4 LT |
990 | device->flags.removable = 1; |
991 | ||
992 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
952c63e9 JL |
993 | if (acpi_has_method(device->handle, "_EJD") || |
994 | acpi_has_method(device->handle, "_EJ0")) | |
1da177e4 | 995 | device->flags.ejectable = 1; |
1da177e4 LT |
996 | } |
997 | ||
c7bcb4e9 | 998 | static void acpi_device_get_busid(struct acpi_device *device) |
1da177e4 | 999 | { |
4be44fcd LB |
1000 | char bus_id[5] = { '?', 0 }; |
1001 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
1002 | int i = 0; | |
1da177e4 LT |
1003 | |
1004 | /* | |
1005 | * Bus ID | |
1006 | * ------ | |
1007 | * The device's Bus ID is simply the object name. | |
1008 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
1009 | */ | |
859ac9a4 | 1010 | if (ACPI_IS_ROOT_DEVICE(device)) { |
1da177e4 | 1011 | strcpy(device->pnp.bus_id, "ACPI"); |
859ac9a4 BH |
1012 | return; |
1013 | } | |
1014 | ||
1015 | switch (device->device_type) { | |
1da177e4 LT |
1016 | case ACPI_BUS_TYPE_POWER_BUTTON: |
1017 | strcpy(device->pnp.bus_id, "PWRF"); | |
1018 | break; | |
1019 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
1020 | strcpy(device->pnp.bus_id, "SLPF"); | |
1021 | break; | |
1022 | default: | |
66b7ed40 | 1023 | acpi_get_name(device->handle, ACPI_SINGLE_NAME, &buffer); |
1da177e4 LT |
1024 | /* Clean up trailing underscores (if any) */ |
1025 | for (i = 3; i > 1; i--) { | |
1026 | if (bus_id[i] == '_') | |
1027 | bus_id[i] = '\0'; | |
1028 | else | |
1029 | break; | |
1030 | } | |
1031 | strcpy(device->pnp.bus_id, bus_id); | |
1032 | break; | |
1033 | } | |
1034 | } | |
1035 | ||
ebf4df8d JL |
1036 | /* |
1037 | * acpi_ata_match - see if an acpi object is an ATA device | |
1038 | * | |
1039 | * If an acpi object has one of the ACPI ATA methods defined, | |
1040 | * then we can safely call it an ATA device. | |
1041 | */ | |
1042 | bool acpi_ata_match(acpi_handle handle) | |
1043 | { | |
1044 | return acpi_has_method(handle, "_GTF") || | |
1045 | acpi_has_method(handle, "_GTM") || | |
1046 | acpi_has_method(handle, "_STM") || | |
1047 | acpi_has_method(handle, "_SDD"); | |
1048 | } | |
1049 | ||
54735266 | 1050 | /* |
d4e1a692 | 1051 | * acpi_bay_match - see if an acpi object is an ejectable driver bay |
54735266 ZR |
1052 | * |
1053 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, | |
1054 | * then we can safely call it an ejectable drive bay | |
1055 | */ | |
ebf4df8d | 1056 | bool acpi_bay_match(acpi_handle handle) |
d4e1a692 | 1057 | { |
54735266 ZR |
1058 | acpi_handle phandle; |
1059 | ||
952c63e9 | 1060 | if (!acpi_has_method(handle, "_EJ0")) |
ebf4df8d JL |
1061 | return false; |
1062 | if (acpi_ata_match(handle)) | |
1063 | return true; | |
1064 | if (ACPI_FAILURE(acpi_get_parent(handle, &phandle))) | |
1065 | return false; | |
54735266 | 1066 | |
ebf4df8d | 1067 | return acpi_ata_match(phandle); |
54735266 ZR |
1068 | } |
1069 | ||
b43109fa | 1070 | bool acpi_device_is_battery(struct acpi_device *adev) |
1e2380cd | 1071 | { |
b43109fa | 1072 | struct acpi_hardware_id *hwid; |
1e2380cd | 1073 | |
b43109fa RW |
1074 | list_for_each_entry(hwid, &adev->pnp.ids, list) |
1075 | if (!strcmp("PNP0C0A", hwid->id)) | |
1076 | return true; | |
1e2380cd | 1077 | |
b43109fa | 1078 | return false; |
1e2380cd RW |
1079 | } |
1080 | ||
b43109fa | 1081 | static bool is_ejectable_bay(struct acpi_device *adev) |
1e2380cd | 1082 | { |
b43109fa RW |
1083 | acpi_handle handle = adev->handle; |
1084 | ||
1085 | if (acpi_has_method(handle, "_EJ0") && acpi_device_is_battery(adev)) | |
1e2380cd RW |
1086 | return true; |
1087 | ||
1088 | return acpi_bay_match(handle); | |
1089 | } | |
1090 | ||
3620f2f2 | 1091 | /* |
d4e1a692 | 1092 | * acpi_dock_match - see if an acpi object has a _DCK method |
3620f2f2 | 1093 | */ |
ebf4df8d | 1094 | bool acpi_dock_match(acpi_handle handle) |
3620f2f2 | 1095 | { |
ebf4df8d | 1096 | return acpi_has_method(handle, "_DCK"); |
3620f2f2 FS |
1097 | } |
1098 | ||
adc8bb8e HG |
1099 | static acpi_status |
1100 | acpi_backlight_cap_match(acpi_handle handle, u32 level, void *context, | |
1101 | void **return_value) | |
1102 | { | |
1103 | long *cap = context; | |
1104 | ||
1105 | if (acpi_has_method(handle, "_BCM") && | |
1106 | acpi_has_method(handle, "_BCL")) { | |
1107 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found generic backlight " | |
1108 | "support\n")); | |
1109 | *cap |= ACPI_VIDEO_BACKLIGHT; | |
1110 | if (!acpi_has_method(handle, "_BQC")) | |
1111 | printk(KERN_WARNING FW_BUG PREFIX "No _BQC method, " | |
1112 | "cannot determine initial brightness\n"); | |
1113 | /* We have backlight support, no need to scan further */ | |
1114 | return AE_CTRL_TERMINATE; | |
1115 | } | |
1116 | return 0; | |
1117 | } | |
1118 | ||
1119 | /* Returns true if the ACPI object is a video device which can be | |
1120 | * handled by video.ko. | |
1121 | * The device will get a Linux specific CID added in scan.c to | |
1122 | * identify the device as an ACPI graphics device | |
1123 | * Be aware that the graphics device may not be physically present | |
1124 | * Use acpi_video_get_capabilities() to detect general ACPI video | |
1125 | * capabilities of present cards | |
1126 | */ | |
1127 | long acpi_is_video_device(acpi_handle handle) | |
1128 | { | |
1129 | long video_caps = 0; | |
1130 | ||
1131 | /* Is this device able to support video switching ? */ | |
1132 | if (acpi_has_method(handle, "_DOD") || acpi_has_method(handle, "_DOS")) | |
1133 | video_caps |= ACPI_VIDEO_OUTPUT_SWITCHING; | |
1134 | ||
1135 | /* Is this device able to retrieve a video ROM ? */ | |
1136 | if (acpi_has_method(handle, "_ROM")) | |
1137 | video_caps |= ACPI_VIDEO_ROM_AVAILABLE; | |
1138 | ||
1139 | /* Is this device able to configure which video head to be POSTed ? */ | |
1140 | if (acpi_has_method(handle, "_VPO") && | |
1141 | acpi_has_method(handle, "_GPD") && | |
1142 | acpi_has_method(handle, "_SPD")) | |
1143 | video_caps |= ACPI_VIDEO_DEVICE_POSTING; | |
1144 | ||
1145 | /* Only check for backlight functionality if one of the above hit. */ | |
1146 | if (video_caps) | |
1147 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, | |
1148 | ACPI_UINT32_MAX, acpi_backlight_cap_match, NULL, | |
1149 | &video_caps, NULL); | |
1150 | ||
1151 | return video_caps; | |
1152 | } | |
1153 | EXPORT_SYMBOL(acpi_is_video_device); | |
1154 | ||
620e112c | 1155 | const char *acpi_device_hid(struct acpi_device *device) |
15b8dd53 | 1156 | { |
7f47fa6c | 1157 | struct acpi_hardware_id *hid; |
15b8dd53 | 1158 | |
2b2ae7c7 TR |
1159 | if (list_empty(&device->pnp.ids)) |
1160 | return dummy_hid; | |
1161 | ||
7f47fa6c BH |
1162 | hid = list_first_entry(&device->pnp.ids, struct acpi_hardware_id, list); |
1163 | return hid->id; | |
1164 | } | |
1165 | EXPORT_SYMBOL(acpi_device_hid); | |
15b8dd53 | 1166 | |
d4e1a692 | 1167 | static void acpi_add_id(struct acpi_device_pnp *pnp, const char *dev_id) |
7f47fa6c BH |
1168 | { |
1169 | struct acpi_hardware_id *id; | |
15b8dd53 | 1170 | |
7f47fa6c BH |
1171 | id = kmalloc(sizeof(*id), GFP_KERNEL); |
1172 | if (!id) | |
1173 | return; | |
15b8dd53 | 1174 | |
6a0d12ef | 1175 | id->id = kstrdup_const(dev_id, GFP_KERNEL); |
7f47fa6c BH |
1176 | if (!id->id) { |
1177 | kfree(id); | |
1178 | return; | |
15b8dd53 BM |
1179 | } |
1180 | ||
d4e1a692 TK |
1181 | list_add_tail(&id->list, &pnp->ids); |
1182 | pnp->type.hardware_id = 1; | |
15b8dd53 BM |
1183 | } |
1184 | ||
222e82ac DW |
1185 | /* |
1186 | * Old IBM workstations have a DSDT bug wherein the SMBus object | |
1187 | * lacks the SMBUS01 HID and the methods do not have the necessary "_" | |
1188 | * prefix. Work around this. | |
1189 | */ | |
ebf4df8d | 1190 | static bool acpi_ibm_smbus_match(acpi_handle handle) |
222e82ac | 1191 | { |
ebf4df8d JL |
1192 | char node_name[ACPI_PATH_SEGMENT_LENGTH]; |
1193 | struct acpi_buffer path = { sizeof(node_name), node_name }; | |
222e82ac DW |
1194 | |
1195 | if (!dmi_name_in_vendors("IBM")) | |
ebf4df8d | 1196 | return false; |
222e82ac DW |
1197 | |
1198 | /* Look for SMBS object */ | |
ebf4df8d JL |
1199 | if (ACPI_FAILURE(acpi_get_name(handle, ACPI_SINGLE_NAME, &path)) || |
1200 | strcmp("SMBS", path.pointer)) | |
1201 | return false; | |
222e82ac DW |
1202 | |
1203 | /* Does it have the necessary (but misnamed) methods? */ | |
952c63e9 JL |
1204 | if (acpi_has_method(handle, "SBI") && |
1205 | acpi_has_method(handle, "SBR") && | |
1206 | acpi_has_method(handle, "SBW")) | |
ebf4df8d JL |
1207 | return true; |
1208 | ||
1209 | return false; | |
222e82ac DW |
1210 | } |
1211 | ||
ae3caa80 JL |
1212 | static bool acpi_object_is_system_bus(acpi_handle handle) |
1213 | { | |
1214 | acpi_handle tmp; | |
1215 | ||
1216 | if (ACPI_SUCCESS(acpi_get_handle(NULL, "\\_SB", &tmp)) && | |
1217 | tmp == handle) | |
1218 | return true; | |
1219 | if (ACPI_SUCCESS(acpi_get_handle(NULL, "\\_TZ", &tmp)) && | |
1220 | tmp == handle) | |
1221 | return true; | |
1222 | ||
1223 | return false; | |
1224 | } | |
1225 | ||
c0af4175 TK |
1226 | static void acpi_set_pnp_ids(acpi_handle handle, struct acpi_device_pnp *pnp, |
1227 | int device_type) | |
1da177e4 | 1228 | { |
4be44fcd | 1229 | acpi_status status; |
57f3674f | 1230 | struct acpi_device_info *info; |
78e25fef | 1231 | struct acpi_pnp_device_id_list *cid_list; |
7f47fa6c | 1232 | int i; |
1da177e4 | 1233 | |
c0af4175 | 1234 | switch (device_type) { |
1da177e4 | 1235 | case ACPI_BUS_TYPE_DEVICE: |
c0af4175 TK |
1236 | if (handle == ACPI_ROOT_OBJECT) { |
1237 | acpi_add_id(pnp, ACPI_SYSTEM_HID); | |
859ac9a4 BH |
1238 | break; |
1239 | } | |
1240 | ||
c0af4175 | 1241 | status = acpi_get_object_info(handle, &info); |
1da177e4 | 1242 | if (ACPI_FAILURE(status)) { |
c0af4175 TK |
1243 | pr_err(PREFIX "%s: Error reading device info\n", |
1244 | __func__); | |
1da177e4 LT |
1245 | return; |
1246 | } | |
1247 | ||
549e6845 | 1248 | if (info->valid & ACPI_VALID_HID) { |
c0af4175 | 1249 | acpi_add_id(pnp, info->hardware_id.string); |
549e6845 RW |
1250 | pnp->type.platform_id = 1; |
1251 | } | |
57f3674f | 1252 | if (info->valid & ACPI_VALID_CID) { |
15b8dd53 | 1253 | cid_list = &info->compatible_id_list; |
57f3674f | 1254 | for (i = 0; i < cid_list->count; i++) |
c0af4175 | 1255 | acpi_add_id(pnp, cid_list->ids[i].string); |
57f3674f | 1256 | } |
1da177e4 | 1257 | if (info->valid & ACPI_VALID_ADR) { |
c0af4175 TK |
1258 | pnp->bus_address = info->address; |
1259 | pnp->type.bus_address = 1; | |
1da177e4 | 1260 | } |
ccf78040 | 1261 | if (info->valid & ACPI_VALID_UID) |
c0af4175 | 1262 | pnp->unique_id = kstrdup(info->unique_id.string, |
ccf78040 | 1263 | GFP_KERNEL); |
26095a01 SS |
1264 | if (info->valid & ACPI_VALID_CLS) |
1265 | acpi_add_id(pnp, info->class_code.string); | |
ae843332 | 1266 | |
a83893ae BH |
1267 | kfree(info); |
1268 | ||
57f3674f BH |
1269 | /* |
1270 | * Some devices don't reliably have _HIDs & _CIDs, so add | |
1271 | * synthetic HIDs to make sure drivers can find them. | |
1272 | */ | |
c0af4175 TK |
1273 | if (acpi_is_video_device(handle)) |
1274 | acpi_add_id(pnp, ACPI_VIDEO_HID); | |
ebf4df8d | 1275 | else if (acpi_bay_match(handle)) |
c0af4175 | 1276 | acpi_add_id(pnp, ACPI_BAY_HID); |
ebf4df8d | 1277 | else if (acpi_dock_match(handle)) |
c0af4175 | 1278 | acpi_add_id(pnp, ACPI_DOCK_HID); |
ebf4df8d | 1279 | else if (acpi_ibm_smbus_match(handle)) |
c0af4175 | 1280 | acpi_add_id(pnp, ACPI_SMBUS_IBM_HID); |
ae3caa80 JL |
1281 | else if (list_empty(&pnp->ids) && |
1282 | acpi_object_is_system_bus(handle)) { | |
1283 | /* \_SB, \_TZ, LNXSYBUS */ | |
1284 | acpi_add_id(pnp, ACPI_BUS_HID); | |
c0af4175 TK |
1285 | strcpy(pnp->device_name, ACPI_BUS_DEVICE_NAME); |
1286 | strcpy(pnp->device_class, ACPI_BUS_CLASS); | |
b7b30de5 | 1287 | } |
54735266 | 1288 | |
1da177e4 LT |
1289 | break; |
1290 | case ACPI_BUS_TYPE_POWER: | |
c0af4175 | 1291 | acpi_add_id(pnp, ACPI_POWER_HID); |
1da177e4 LT |
1292 | break; |
1293 | case ACPI_BUS_TYPE_PROCESSOR: | |
c0af4175 | 1294 | acpi_add_id(pnp, ACPI_PROCESSOR_OBJECT_HID); |
1da177e4 | 1295 | break; |
1da177e4 | 1296 | case ACPI_BUS_TYPE_THERMAL: |
c0af4175 | 1297 | acpi_add_id(pnp, ACPI_THERMAL_HID); |
1da177e4 LT |
1298 | break; |
1299 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
c0af4175 | 1300 | acpi_add_id(pnp, ACPI_BUTTON_HID_POWERF); |
1da177e4 LT |
1301 | break; |
1302 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
c0af4175 | 1303 | acpi_add_id(pnp, ACPI_BUTTON_HID_SLEEPF); |
1da177e4 LT |
1304 | break; |
1305 | } | |
1da177e4 LT |
1306 | } |
1307 | ||
c0af4175 TK |
1308 | void acpi_free_pnp_ids(struct acpi_device_pnp *pnp) |
1309 | { | |
1310 | struct acpi_hardware_id *id, *tmp; | |
1311 | ||
1312 | list_for_each_entry_safe(id, tmp, &pnp->ids, list) { | |
6a0d12ef | 1313 | kfree_const(id->id); |
c0af4175 TK |
1314 | kfree(id); |
1315 | } | |
1316 | kfree(pnp->unique_id); | |
1317 | } | |
1318 | ||
b84f196d SS |
1319 | /** |
1320 | * acpi_dma_supported - Check DMA support for the specified device. | |
1321 | * @adev: The pointer to acpi device | |
1322 | * | |
1323 | * Return false if DMA is not supported. Otherwise, return true | |
1324 | */ | |
1325 | bool acpi_dma_supported(struct acpi_device *adev) | |
1326 | { | |
1327 | if (!adev) | |
1328 | return false; | |
1329 | ||
1330 | if (adev->flags.cca_seen) | |
1331 | return true; | |
1332 | ||
1333 | /* | |
1334 | * Per ACPI 6.0 sec 6.2.17, assume devices can do cache-coherent | |
1335 | * DMA on "Intel platforms". Presumably that includes all x86 and | |
1336 | * ia64, and other arches will set CONFIG_ACPI_CCA_REQUIRED=y. | |
1337 | */ | |
1338 | if (!IS_ENABLED(CONFIG_ACPI_CCA_REQUIRED)) | |
1339 | return true; | |
1340 | ||
1341 | return false; | |
1342 | } | |
1343 | ||
1344 | /** | |
1345 | * acpi_get_dma_attr - Check the supported DMA attr for the specified device. | |
1346 | * @adev: The pointer to acpi device | |
1347 | * | |
1348 | * Return enum dev_dma_attr. | |
1349 | */ | |
1350 | enum dev_dma_attr acpi_get_dma_attr(struct acpi_device *adev) | |
1351 | { | |
1352 | if (!acpi_dma_supported(adev)) | |
1353 | return DEV_DMA_NOT_SUPPORTED; | |
1354 | ||
1355 | if (adev->flags.coherent_dma) | |
1356 | return DEV_DMA_COHERENT; | |
1357 | else | |
1358 | return DEV_DMA_NON_COHERENT; | |
1359 | } | |
1360 | ||
d0562674 SS |
1361 | static void acpi_init_coherency(struct acpi_device *adev) |
1362 | { | |
1363 | unsigned long long cca = 0; | |
1364 | acpi_status status; | |
1365 | struct acpi_device *parent = adev->parent; | |
1366 | ||
1367 | if (parent && parent->flags.cca_seen) { | |
1368 | /* | |
1369 | * From ACPI spec, OSPM will ignore _CCA if an ancestor | |
1370 | * already saw one. | |
1371 | */ | |
1372 | adev->flags.cca_seen = 1; | |
1373 | cca = parent->flags.coherent_dma; | |
1374 | } else { | |
1375 | status = acpi_evaluate_integer(adev->handle, "_CCA", | |
1376 | NULL, &cca); | |
1377 | if (ACPI_SUCCESS(status)) | |
1378 | adev->flags.cca_seen = 1; | |
1379 | else if (!IS_ENABLED(CONFIG_ACPI_CCA_REQUIRED)) | |
1380 | /* | |
1381 | * If architecture does not specify that _CCA is | |
1382 | * required for DMA-able devices (e.g. x86), | |
1383 | * we default to _CCA=1. | |
1384 | */ | |
1385 | cca = 1; | |
1386 | else | |
1387 | acpi_handle_debug(adev->handle, | |
1388 | "ACPI device is missing _CCA.\n"); | |
1389 | } | |
1390 | ||
1391 | adev->flags.coherent_dma = cca; | |
1392 | } | |
1393 | ||
82c7d5ef RW |
1394 | void acpi_init_device_object(struct acpi_device *device, acpi_handle handle, |
1395 | int type, unsigned long long sta) | |
1da177e4 | 1396 | { |
d43e167d RW |
1397 | INIT_LIST_HEAD(&device->pnp.ids); |
1398 | device->device_type = type; | |
1399 | device->handle = handle; | |
1400 | device->parent = acpi_bus_get_parent(handle); | |
8a0662d9 | 1401 | device->fwnode.type = FWNODE_ACPI; |
25db115b | 1402 | acpi_set_device_status(device, sta); |
d43e167d | 1403 | acpi_device_get_busid(device); |
c0af4175 | 1404 | acpi_set_pnp_ids(handle, &device->pnp, type); |
ffdcd955 | 1405 | acpi_init_properties(device); |
d43e167d | 1406 | acpi_bus_get_flags(device); |
2c0d4fe0 | 1407 | device->flags.match_driver = false; |
202317a5 RW |
1408 | device->flags.initialized = true; |
1409 | device->flags.visited = false; | |
cf860be6 RW |
1410 | device_initialize(&device->dev); |
1411 | dev_set_uevent_suppress(&device->dev, true); | |
d0562674 | 1412 | acpi_init_coherency(device); |
cf860be6 | 1413 | } |
bc3b0772 | 1414 | |
cf860be6 RW |
1415 | void acpi_device_add_finalize(struct acpi_device *device) |
1416 | { | |
1417 | dev_set_uevent_suppress(&device->dev, false); | |
1418 | kobject_uevent(&device->dev.kobj, KOBJ_ADD); | |
1da177e4 LT |
1419 | } |
1420 | ||
5c478f49 BH |
1421 | static int acpi_add_single_object(struct acpi_device **child, |
1422 | acpi_handle handle, int type, | |
2c0d4fe0 | 1423 | unsigned long long sta) |
1da177e4 | 1424 | { |
77c24888 BH |
1425 | int result; |
1426 | struct acpi_device *device; | |
29aaefa6 | 1427 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 | 1428 | |
36bcbec7 | 1429 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
1da177e4 | 1430 | if (!device) { |
6468463a | 1431 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
d550d98d | 1432 | return -ENOMEM; |
1da177e4 | 1433 | } |
1da177e4 | 1434 | |
d43e167d RW |
1435 | acpi_init_device_object(device, handle, type, sta); |
1436 | acpi_bus_get_power_flags(device); | |
d57d09a4 | 1437 | acpi_bus_get_wakeup_device_flags(device); |
1da177e4 | 1438 | |
cf860be6 | 1439 | result = acpi_device_add(device, acpi_device_release); |
d43e167d | 1440 | if (result) { |
718fb0de | 1441 | acpi_device_release(&device->dev); |
d43e167d RW |
1442 | return result; |
1443 | } | |
1da177e4 | 1444 | |
d43e167d | 1445 | acpi_power_add_remove_device(device, true); |
cf860be6 | 1446 | acpi_device_add_finalize(device); |
d43e167d RW |
1447 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); |
1448 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Added %s [%s] parent %s\n", | |
1449 | dev_name(&device->dev), (char *) buffer.pointer, | |
1450 | device->parent ? dev_name(&device->parent->dev) : "(null)")); | |
1451 | kfree(buffer.pointer); | |
1452 | *child = device; | |
1453 | return 0; | |
bf325f95 RW |
1454 | } |
1455 | ||
778cbc1d BH |
1456 | static int acpi_bus_type_and_status(acpi_handle handle, int *type, |
1457 | unsigned long long *sta) | |
1da177e4 | 1458 | { |
778cbc1d BH |
1459 | acpi_status status; |
1460 | acpi_object_type acpi_type; | |
1da177e4 | 1461 | |
778cbc1d | 1462 | status = acpi_get_type(handle, &acpi_type); |
51a85faf | 1463 | if (ACPI_FAILURE(status)) |
778cbc1d | 1464 | return -ENODEV; |
4be44fcd | 1465 | |
778cbc1d | 1466 | switch (acpi_type) { |
51a85faf BH |
1467 | case ACPI_TYPE_ANY: /* for ACPI_ROOT_OBJECT */ |
1468 | case ACPI_TYPE_DEVICE: | |
778cbc1d BH |
1469 | *type = ACPI_BUS_TYPE_DEVICE; |
1470 | status = acpi_bus_get_status_handle(handle, sta); | |
1471 | if (ACPI_FAILURE(status)) | |
e399037e | 1472 | *sta = 0; |
51a85faf BH |
1473 | break; |
1474 | case ACPI_TYPE_PROCESSOR: | |
778cbc1d BH |
1475 | *type = ACPI_BUS_TYPE_PROCESSOR; |
1476 | status = acpi_bus_get_status_handle(handle, sta); | |
1477 | if (ACPI_FAILURE(status)) | |
1478 | return -ENODEV; | |
51a85faf BH |
1479 | break; |
1480 | case ACPI_TYPE_THERMAL: | |
778cbc1d BH |
1481 | *type = ACPI_BUS_TYPE_THERMAL; |
1482 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1483 | break; |
1484 | case ACPI_TYPE_POWER: | |
778cbc1d BH |
1485 | *type = ACPI_BUS_TYPE_POWER; |
1486 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1487 | break; |
1488 | default: | |
778cbc1d | 1489 | return -ENODEV; |
51a85faf | 1490 | } |
1da177e4 | 1491 | |
778cbc1d BH |
1492 | return 0; |
1493 | } | |
1494 | ||
202317a5 RW |
1495 | bool acpi_device_is_present(struct acpi_device *adev) |
1496 | { | |
1497 | if (adev->status.present || adev->status.functional) | |
1498 | return true; | |
1499 | ||
1500 | adev->flags.initialized = false; | |
1501 | return false; | |
1502 | } | |
1503 | ||
4b59cc1f | 1504 | static bool acpi_scan_handler_matching(struct acpi_scan_handler *handler, |
844142c3 | 1505 | const char *idstr, |
4b59cc1f RW |
1506 | const struct acpi_device_id **matchid) |
1507 | { | |
1508 | const struct acpi_device_id *devid; | |
1509 | ||
aca0a4eb RW |
1510 | if (handler->match) |
1511 | return handler->match(idstr, matchid); | |
1512 | ||
4b59cc1f RW |
1513 | for (devid = handler->ids; devid->id[0]; devid++) |
1514 | if (!strcmp((char *)devid->id, idstr)) { | |
1515 | if (matchid) | |
1516 | *matchid = devid; | |
1517 | ||
1518 | return true; | |
1519 | } | |
1520 | ||
1521 | return false; | |
1522 | } | |
1523 | ||
844142c3 | 1524 | static struct acpi_scan_handler *acpi_scan_match_handler(const char *idstr, |
6b772e8f TK |
1525 | const struct acpi_device_id **matchid) |
1526 | { | |
1527 | struct acpi_scan_handler *handler; | |
1528 | ||
1529 | list_for_each_entry(handler, &acpi_scan_handlers_list, list_node) | |
1530 | if (acpi_scan_handler_matching(handler, idstr, matchid)) | |
1531 | return handler; | |
1532 | ||
1533 | return NULL; | |
1534 | } | |
1535 | ||
3f8055c3 RW |
1536 | void acpi_scan_hotplug_enabled(struct acpi_hotplug_profile *hotplug, bool val) |
1537 | { | |
3f8055c3 RW |
1538 | if (!!hotplug->enabled == !!val) |
1539 | return; | |
1540 | ||
1541 | mutex_lock(&acpi_scan_lock); | |
1542 | ||
1543 | hotplug->enabled = val; | |
3f8055c3 RW |
1544 | |
1545 | mutex_unlock(&acpi_scan_lock); | |
1546 | } | |
1547 | ||
3c2cc7ff | 1548 | static void acpi_scan_init_hotplug(struct acpi_device *adev) |
a33ec399 | 1549 | { |
6b772e8f | 1550 | struct acpi_hardware_id *hwid; |
a33ec399 | 1551 | |
b43109fa | 1552 | if (acpi_dock_match(adev->handle) || is_ejectable_bay(adev)) { |
1e2380cd RW |
1553 | acpi_dock_add(adev); |
1554 | return; | |
1555 | } | |
3c2cc7ff RW |
1556 | list_for_each_entry(hwid, &adev->pnp.ids, list) { |
1557 | struct acpi_scan_handler *handler; | |
a33ec399 | 1558 | |
6b772e8f | 1559 | handler = acpi_scan_match_handler(hwid->id, NULL); |
1a699476 RW |
1560 | if (handler) { |
1561 | adev->flags.hotplug_notify = true; | |
1562 | break; | |
1563 | } | |
3c2cc7ff | 1564 | } |
a33ec399 RW |
1565 | } |
1566 | ||
40e7fcb1 LT |
1567 | static void acpi_device_dep_initialize(struct acpi_device *adev) |
1568 | { | |
1569 | struct acpi_dep_data *dep; | |
1570 | struct acpi_handle_list dep_devices; | |
1571 | acpi_status status; | |
1572 | int i; | |
1573 | ||
1574 | if (!acpi_has_method(adev->handle, "_DEP")) | |
1575 | return; | |
1576 | ||
1577 | status = acpi_evaluate_reference(adev->handle, "_DEP", NULL, | |
1578 | &dep_devices); | |
1579 | if (ACPI_FAILURE(status)) { | |
80167a24 | 1580 | dev_dbg(&adev->dev, "Failed to evaluate _DEP.\n"); |
40e7fcb1 LT |
1581 | return; |
1582 | } | |
1583 | ||
1584 | for (i = 0; i < dep_devices.count; i++) { | |
1585 | struct acpi_device_info *info; | |
1586 | int skip; | |
1587 | ||
1588 | status = acpi_get_object_info(dep_devices.handles[i], &info); | |
1589 | if (ACPI_FAILURE(status)) { | |
80167a24 | 1590 | dev_dbg(&adev->dev, "Error reading _DEP device info\n"); |
40e7fcb1 LT |
1591 | continue; |
1592 | } | |
1593 | ||
1594 | /* | |
1595 | * Skip the dependency of Windows System Power | |
1596 | * Management Controller | |
1597 | */ | |
1598 | skip = info->valid & ACPI_VALID_HID && | |
1599 | !strcmp(info->hardware_id.string, "INT3396"); | |
1600 | ||
1601 | kfree(info); | |
1602 | ||
1603 | if (skip) | |
1604 | continue; | |
1605 | ||
1606 | dep = kzalloc(sizeof(struct acpi_dep_data), GFP_KERNEL); | |
1607 | if (!dep) | |
1608 | return; | |
1609 | ||
1610 | dep->master = dep_devices.handles[i]; | |
1611 | dep->slave = adev->handle; | |
1612 | adev->dep_unmet++; | |
1613 | ||
1614 | mutex_lock(&acpi_dep_list_lock); | |
1615 | list_add_tail(&dep->node , &acpi_dep_list); | |
1616 | mutex_unlock(&acpi_dep_list_lock); | |
1617 | } | |
1618 | } | |
1619 | ||
e3863094 RW |
1620 | static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used, |
1621 | void *not_used, void **return_value) | |
778cbc1d | 1622 | { |
805d410f | 1623 | struct acpi_device *device = NULL; |
778cbc1d BH |
1624 | int type; |
1625 | unsigned long long sta; | |
1626 | int result; | |
1627 | ||
4002bf38 RW |
1628 | acpi_bus_get_device(handle, &device); |
1629 | if (device) | |
1630 | goto out; | |
1631 | ||
778cbc1d BH |
1632 | result = acpi_bus_type_and_status(handle, &type, &sta); |
1633 | if (result) | |
1634 | return AE_OK; | |
1635 | ||
82c7d5ef RW |
1636 | if (type == ACPI_BUS_TYPE_POWER) { |
1637 | acpi_add_power_resource(handle); | |
1638 | return AE_OK; | |
1639 | } | |
1640 | ||
2c0d4fe0 | 1641 | acpi_add_single_object(&device, handle, type, sta); |
e3b87f8a | 1642 | if (!device) |
51a85faf | 1643 | return AE_CTRL_DEPTH; |
1da177e4 | 1644 | |
3c2cc7ff | 1645 | acpi_scan_init_hotplug(device); |
40e7fcb1 | 1646 | acpi_device_dep_initialize(device); |
3c2cc7ff | 1647 | |
4002bf38 | 1648 | out: |
51a85faf BH |
1649 | if (!*return_value) |
1650 | *return_value = device; | |
805d410f | 1651 | |
51a85faf BH |
1652 | return AE_OK; |
1653 | } | |
3fb02738 | 1654 | |
48459340 ZR |
1655 | static int acpi_check_spi_i2c_slave(struct acpi_resource *ares, void *data) |
1656 | { | |
1657 | bool *is_spi_i2c_slave_p = data; | |
1658 | ||
1659 | if (ares->type != ACPI_RESOURCE_TYPE_SERIAL_BUS) | |
1660 | return 1; | |
1661 | ||
1662 | /* | |
1663 | * devices that are connected to UART still need to be enumerated to | |
1664 | * platform bus | |
1665 | */ | |
1666 | if (ares->data.common_serial_bus.type != ACPI_RESOURCE_SERIAL_TYPE_UART) | |
1667 | *is_spi_i2c_slave_p = true; | |
1668 | ||
1669 | /* no need to do more checking */ | |
1670 | return -1; | |
1671 | } | |
1672 | ||
1673 | static void acpi_default_enumeration(struct acpi_device *device) | |
1674 | { | |
1675 | struct list_head resource_list; | |
1676 | bool is_spi_i2c_slave = false; | |
1677 | ||
48459340 ZR |
1678 | /* |
1679 | * Do not enemerate SPI/I2C slaves as they will be enuerated by their | |
1680 | * respective parents. | |
1681 | */ | |
1682 | INIT_LIST_HEAD(&resource_list); | |
1683 | acpi_dev_get_resources(device, &resource_list, acpi_check_spi_i2c_slave, | |
1684 | &is_spi_i2c_slave); | |
1685 | acpi_dev_free_resource_list(&resource_list); | |
1686 | if (!is_spi_i2c_slave) | |
1687 | acpi_create_platform_device(device); | |
1688 | } | |
1689 | ||
7d284352 | 1690 | static const struct acpi_device_id generic_device_ids[] = { |
ee892094 | 1691 | {ACPI_DT_NAMESPACE_HID, }, |
7d284352 RW |
1692 | {"", }, |
1693 | }; | |
1694 | ||
1695 | static int acpi_generic_device_attach(struct acpi_device *adev, | |
1696 | const struct acpi_device_id *not_used) | |
1697 | { | |
1698 | /* | |
ee892094 RW |
1699 | * Since ACPI_DT_NAMESPACE_HID is the only ID handled here, the test |
1700 | * below can be unconditional. | |
7d284352 RW |
1701 | */ |
1702 | if (adev->data.of_compatible) | |
1703 | acpi_default_enumeration(adev); | |
1704 | ||
1705 | return 1; | |
1706 | } | |
1707 | ||
1708 | static struct acpi_scan_handler generic_device_handler = { | |
1709 | .ids = generic_device_ids, | |
1710 | .attach = acpi_generic_device_attach, | |
1711 | }; | |
1712 | ||
c5698074 | 1713 | static int acpi_scan_attach_handler(struct acpi_device *device) |
ca589f94 | 1714 | { |
c5698074 RW |
1715 | struct acpi_hardware_id *hwid; |
1716 | int ret = 0; | |
ca589f94 | 1717 | |
c5698074 | 1718 | list_for_each_entry(hwid, &device->pnp.ids, list) { |
87b85b3c | 1719 | const struct acpi_device_id *devid; |
c5698074 | 1720 | struct acpi_scan_handler *handler; |
ca589f94 | 1721 | |
c5698074 RW |
1722 | handler = acpi_scan_match_handler(hwid->id, &devid); |
1723 | if (handler) { | |
d34afa9d RW |
1724 | if (!handler->attach) { |
1725 | device->pnp.type.platform_id = 0; | |
1726 | continue; | |
1727 | } | |
9cb32acf | 1728 | device->handler = handler; |
87b85b3c | 1729 | ret = handler->attach(device, devid); |
9cb32acf | 1730 | if (ret > 0) |
c5698074 | 1731 | break; |
9cb32acf RW |
1732 | |
1733 | device->handler = NULL; | |
1734 | if (ret < 0) | |
c5698074 | 1735 | break; |
ca589f94 RW |
1736 | } |
1737 | } | |
48459340 | 1738 | |
ca589f94 RW |
1739 | return ret; |
1740 | } | |
1741 | ||
2c22e652 | 1742 | static void acpi_bus_attach(struct acpi_device *device) |
51a85faf | 1743 | { |
2c22e652 | 1744 | struct acpi_device *child; |
1e2380cd | 1745 | acpi_handle ejd; |
ca589f94 | 1746 | int ret; |
3fb02738 | 1747 | |
1e2380cd RW |
1748 | if (ACPI_SUCCESS(acpi_bus_get_ejd(device->handle, &ejd))) |
1749 | register_dock_dependent_device(device, ejd); | |
1750 | ||
2c22e652 | 1751 | acpi_bus_get_status(device); |
202317a5 | 1752 | /* Skip devices that are not present. */ |
2c22e652 RW |
1753 | if (!acpi_device_is_present(device)) { |
1754 | device->flags.visited = false; | |
1b1f3e16 | 1755 | device->flags.power_manageable = 0; |
2c22e652 RW |
1756 | return; |
1757 | } | |
3a391a39 | 1758 | if (device->handler) |
2c22e652 | 1759 | goto ok; |
3a391a39 | 1760 | |
202317a5 | 1761 | if (!device->flags.initialized) { |
1b1f3e16 RW |
1762 | device->flags.power_manageable = |
1763 | device->power.states[ACPI_STATE_D0].flags.valid; | |
1764 | if (acpi_bus_init_power(device)) | |
1765 | device->flags.power_manageable = 0; | |
1766 | ||
202317a5 RW |
1767 | device->flags.initialized = true; |
1768 | } | |
2c22e652 | 1769 | device->flags.visited = false; |
ca589f94 | 1770 | ret = acpi_scan_attach_handler(device); |
6931007c | 1771 | if (ret < 0) |
2c22e652 | 1772 | return; |
6931007c RW |
1773 | |
1774 | device->flags.match_driver = true; | |
2c22e652 RW |
1775 | if (!ret) { |
1776 | ret = device_attach(&device->dev); | |
1777 | if (ret < 0) | |
1778 | return; | |
7d284352 RW |
1779 | |
1780 | if (!ret && device->pnp.type.platform_id) | |
1781 | acpi_default_enumeration(device); | |
2c22e652 | 1782 | } |
202317a5 | 1783 | device->flags.visited = true; |
202317a5 | 1784 | |
2c22e652 RW |
1785 | ok: |
1786 | list_for_each_entry(child, &device->children, node) | |
1787 | acpi_bus_attach(child); | |
8ab17fc9 RW |
1788 | |
1789 | if (device->handler && device->handler->hotplug.notify_online) | |
1790 | device->handler->hotplug.notify_online(device); | |
1da177e4 | 1791 | } |
1da177e4 | 1792 | |
40e7fcb1 LT |
1793 | void acpi_walk_dep_device_list(acpi_handle handle) |
1794 | { | |
1795 | struct acpi_dep_data *dep, *tmp; | |
1796 | struct acpi_device *adev; | |
1797 | ||
1798 | mutex_lock(&acpi_dep_list_lock); | |
1799 | list_for_each_entry_safe(dep, tmp, &acpi_dep_list, node) { | |
1800 | if (dep->master == handle) { | |
1801 | acpi_bus_get_device(dep->slave, &adev); | |
1802 | if (!adev) | |
1803 | continue; | |
1804 | ||
1805 | adev->dep_unmet--; | |
1806 | if (!adev->dep_unmet) | |
1807 | acpi_bus_attach(adev); | |
1808 | list_del(&dep->node); | |
1809 | kfree(dep); | |
1810 | } | |
1811 | } | |
1812 | mutex_unlock(&acpi_dep_list_lock); | |
1813 | } | |
1814 | EXPORT_SYMBOL_GPL(acpi_walk_dep_device_list); | |
1815 | ||
636458de | 1816 | /** |
b8bd759a | 1817 | * acpi_bus_scan - Add ACPI device node objects in a given namespace scope. |
636458de | 1818 | * @handle: Root of the namespace scope to scan. |
7779688f | 1819 | * |
636458de RW |
1820 | * Scan a given ACPI tree (probably recently hot-plugged) and create and add |
1821 | * found devices. | |
7779688f | 1822 | * |
636458de RW |
1823 | * If no devices were found, -ENODEV is returned, but it does not mean that |
1824 | * there has been a real error. There just have been no suitable ACPI objects | |
1825 | * in the table trunk from which the kernel could create a device and add an | |
1826 | * appropriate driver. | |
3757b948 RW |
1827 | * |
1828 | * Must be called under acpi_scan_lock. | |
7779688f | 1829 | */ |
b8bd759a | 1830 | int acpi_bus_scan(acpi_handle handle) |
3fb02738 | 1831 | { |
b8bd759a | 1832 | void *device = NULL; |
3fb02738 | 1833 | |
b8bd759a RW |
1834 | if (ACPI_SUCCESS(acpi_bus_check_add(handle, 0, NULL, &device))) |
1835 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, | |
1836 | acpi_bus_check_add, NULL, NULL, &device); | |
3fb02738 | 1837 | |
2c22e652 RW |
1838 | if (device) { |
1839 | acpi_bus_attach(device); | |
1840 | return 0; | |
05404d8f | 1841 | } |
2c22e652 | 1842 | return -ENODEV; |
3fb02738 | 1843 | } |
2c22e652 | 1844 | EXPORT_SYMBOL(acpi_bus_scan); |
1da177e4 | 1845 | |
3757b948 | 1846 | /** |
2c22e652 RW |
1847 | * acpi_bus_trim - Detach scan handlers and drivers from ACPI device objects. |
1848 | * @adev: Root of the ACPI namespace scope to walk. | |
3757b948 RW |
1849 | * |
1850 | * Must be called under acpi_scan_lock. | |
1851 | */ | |
2c22e652 | 1852 | void acpi_bus_trim(struct acpi_device *adev) |
1da177e4 | 1853 | { |
2c22e652 RW |
1854 | struct acpi_scan_handler *handler = adev->handler; |
1855 | struct acpi_device *child; | |
1856 | ||
1857 | list_for_each_entry_reverse(child, &adev->children, node) | |
1858 | acpi_bus_trim(child); | |
1859 | ||
a951c773 | 1860 | adev->flags.match_driver = false; |
2c22e652 RW |
1861 | if (handler) { |
1862 | if (handler->detach) | |
1863 | handler->detach(adev); | |
1864 | ||
1865 | adev->handler = NULL; | |
1866 | } else { | |
1867 | device_release_driver(&adev->dev); | |
1868 | } | |
05404d8f | 1869 | /* |
2c22e652 RW |
1870 | * Most likely, the device is going away, so put it into D3cold before |
1871 | * that. | |
05404d8f | 1872 | */ |
2c22e652 RW |
1873 | acpi_device_set_power(adev, ACPI_STATE_D3_COLD); |
1874 | adev->flags.initialized = false; | |
1875 | adev->flags.visited = false; | |
1da177e4 | 1876 | } |
ceaba663 KA |
1877 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
1878 | ||
e8b945c9 | 1879 | static int acpi_bus_scan_fixed(void) |
1da177e4 | 1880 | { |
4be44fcd | 1881 | int result = 0; |
c4168bff | 1882 | |
1da177e4 LT |
1883 | /* |
1884 | * Enumerate all fixed-feature devices. | |
1885 | */ | |
2c0d4fe0 RW |
1886 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON)) { |
1887 | struct acpi_device *device = NULL; | |
1888 | ||
5c478f49 | 1889 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 1890 | ACPI_BUS_TYPE_POWER_BUTTON, |
2c0d4fe0 RW |
1891 | ACPI_STA_DEFAULT); |
1892 | if (result) | |
1893 | return result; | |
1894 | ||
88346167 | 1895 | device->flags.match_driver = true; |
2c0d4fe0 RW |
1896 | result = device_attach(&device->dev); |
1897 | if (result < 0) | |
1898 | return result; | |
1899 | ||
c10d7a13 | 1900 | device_init_wakeup(&device->dev, true); |
3fb02738 | 1901 | } |
1da177e4 | 1902 | |
2c0d4fe0 RW |
1903 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON)) { |
1904 | struct acpi_device *device = NULL; | |
1905 | ||
5c478f49 | 1906 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 1907 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
2c0d4fe0 RW |
1908 | ACPI_STA_DEFAULT); |
1909 | if (result) | |
1910 | return result; | |
1911 | ||
88346167 | 1912 | device->flags.match_driver = true; |
2c0d4fe0 | 1913 | result = device_attach(&device->dev); |
3fb02738 | 1914 | } |
1da177e4 | 1915 | |
2c0d4fe0 | 1916 | return result < 0 ? result : 0; |
1da177e4 LT |
1917 | } |
1918 | ||
e747f274 | 1919 | int __init acpi_scan_init(void) |
1da177e4 LT |
1920 | { |
1921 | int result; | |
1da177e4 | 1922 | |
92ef2a25 | 1923 | acpi_pci_root_init(); |
4daeaf68 | 1924 | acpi_pci_link_init(); |
ac212b69 | 1925 | acpi_processor_init(); |
f58b082a | 1926 | acpi_lpss_init(); |
92082a88 | 1927 | acpi_apd_init(); |
2fa97feb | 1928 | acpi_cmos_rtc_init(); |
737f1a9f | 1929 | acpi_container_init(); |
0a347644 | 1930 | acpi_memory_hotplug_init(); |
eec15edb | 1931 | acpi_pnp_init(); |
3230bbfc | 1932 | acpi_int340x_thermal_init(); |
97d9a9e9 | 1933 | |
7d284352 RW |
1934 | acpi_scan_add_handler(&generic_device_handler); |
1935 | ||
3757b948 | 1936 | mutex_lock(&acpi_scan_lock); |
1da177e4 LT |
1937 | /* |
1938 | * Enumerate devices in the ACPI namespace. | |
1939 | */ | |
0cd6ac52 RW |
1940 | result = acpi_bus_scan(ACPI_ROOT_OBJECT); |
1941 | if (result) | |
3757b948 | 1942 | goto out; |
1da177e4 | 1943 | |
0cd6ac52 | 1944 | result = acpi_bus_get_device(ACPI_ROOT_OBJECT, &acpi_root); |
1da177e4 | 1945 | if (result) |
3757b948 | 1946 | goto out; |
1da177e4 | 1947 | |
2650ef42 AL |
1948 | /* Fixed feature devices do not exist on HW-reduced platform */ |
1949 | if (!acpi_gbl_reduced_hardware) { | |
1950 | result = acpi_bus_scan_fixed(); | |
1951 | if (result) { | |
1952 | acpi_detach_data(acpi_root->handle, | |
1953 | acpi_scan_drop_device); | |
1954 | acpi_device_del(acpi_root); | |
1955 | put_device(&acpi_root->dev); | |
1956 | goto out; | |
1957 | } | |
b8bd759a | 1958 | } |
1da177e4 | 1959 | |
b8bd759a | 1960 | acpi_update_all_gpes(); |
3757b948 RW |
1961 | |
1962 | out: | |
1963 | mutex_unlock(&acpi_scan_lock); | |
1964 | return result; | |
1da177e4 | 1965 | } |
e647b532 MZ |
1966 | |
1967 | static struct acpi_probe_entry *ape; | |
1968 | static int acpi_probe_count; | |
1969 | static DEFINE_SPINLOCK(acpi_probe_lock); | |
1970 | ||
1971 | static int __init acpi_match_madt(struct acpi_subtable_header *header, | |
1972 | const unsigned long end) | |
1973 | { | |
1974 | if (!ape->subtable_valid || ape->subtable_valid(header, ape)) | |
1975 | if (!ape->probe_subtbl(header, end)) | |
1976 | acpi_probe_count++; | |
1977 | ||
1978 | return 0; | |
1979 | } | |
1980 | ||
1981 | int __init __acpi_probe_device_table(struct acpi_probe_entry *ap_head, int nr) | |
1982 | { | |
1983 | int count = 0; | |
1984 | ||
1985 | if (acpi_disabled) | |
1986 | return 0; | |
1987 | ||
1988 | spin_lock(&acpi_probe_lock); | |
1989 | for (ape = ap_head; nr; ape++, nr--) { | |
1990 | if (ACPI_COMPARE_NAME(ACPI_SIG_MADT, ape->id)) { | |
1991 | acpi_probe_count = 0; | |
1992 | acpi_table_parse_madt(ape->type, acpi_match_madt, 0); | |
1993 | count += acpi_probe_count; | |
1994 | } else { | |
1995 | int res; | |
1996 | res = acpi_table_parse(ape->id, ape->probe_table); | |
1997 | if (!res) | |
1998 | count++; | |
1999 | } | |
2000 | } | |
2001 | spin_unlock(&acpi_probe_lock); | |
2002 | ||
2003 | return count; | |
2004 | } |