Commit | Line | Data |
---|---|---|
457c8996 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1da177e4 LT |
2 | /* |
3 | * scan.c - support for transforming the ACPI namespace into individual objects | |
4 | */ | |
5 | ||
8acf4108 HG |
6 | #define pr_fmt(fmt) "ACPI: " fmt |
7 | ||
1da177e4 LT |
8 | #include <linux/module.h> |
9 | #include <linux/init.h> | |
5a0e3ad6 | 10 | #include <linux/slab.h> |
9b6d97b6 | 11 | #include <linux/kernel.h> |
1da177e4 | 12 | #include <linux/acpi.h> |
643b8e4d | 13 | #include <linux/acpi_iort.h> |
3cf48554 | 14 | #include <linux/acpi_viot.h> |
11a8c5e3 | 15 | #include <linux/iommu.h> |
74523c90 AK |
16 | #include <linux/signal.h> |
17 | #include <linux/kthread.h> | |
222e82ac | 18 | #include <linux/dmi.h> |
0a0f0d8b | 19 | #include <linux/dma-map-ops.h> |
ca9ef3ab | 20 | #include <linux/platform_data/x86/apple.h> |
ca5999fd | 21 | #include <linux/pgtable.h> |
d783156e | 22 | |
e60cc7a6 BH |
23 | #include "internal.h" |
24 | ||
4be44fcd | 25 | extern struct acpi_device *acpi_root; |
1da177e4 LT |
26 | |
27 | #define ACPI_BUS_CLASS "system_bus" | |
29b71a1c | 28 | #define ACPI_BUS_HID "LNXSYBUS" |
1da177e4 LT |
29 | #define ACPI_BUS_DEVICE_NAME "System Bus" |
30 | ||
859ac9a4 BH |
31 | #define ACPI_IS_ROOT_DEVICE(device) (!(device)->parent) |
32 | ||
d783156e RW |
33 | #define INVALID_ACPI_HANDLE ((acpi_handle)empty_zero_page) |
34 | ||
620e112c | 35 | static const char *dummy_hid = "device"; |
2b2ae7c7 | 36 | |
40e7fcb1 LT |
37 | static LIST_HEAD(acpi_dep_list); |
38 | static DEFINE_MUTEX(acpi_dep_list_lock); | |
2d12b6b3 | 39 | LIST_HEAD(acpi_bus_id_list); |
c511cc19 | 40 | static DEFINE_MUTEX(acpi_scan_lock); |
ca589f94 | 41 | static LIST_HEAD(acpi_scan_handlers_list); |
9090589d | 42 | DEFINE_MUTEX(acpi_device_lock); |
1da177e4 | 43 | LIST_HEAD(acpi_wakeup_device_list); |
e525506f | 44 | static DEFINE_MUTEX(acpi_hp_context_lock); |
1da177e4 | 45 | |
a4e081b0 SZ |
46 | /* |
47 | * The UART device described by the SPCR table is the only object which needs | |
48 | * special-casing. Everything else is covered by ACPI namespace paths in STAO | |
49 | * table. | |
50 | */ | |
51 | static u64 spcr_uart_addr; | |
52 | ||
3757b948 RW |
53 | void acpi_scan_lock_acquire(void) |
54 | { | |
55 | mutex_lock(&acpi_scan_lock); | |
56 | } | |
57 | EXPORT_SYMBOL_GPL(acpi_scan_lock_acquire); | |
58 | ||
59 | void acpi_scan_lock_release(void) | |
60 | { | |
61 | mutex_unlock(&acpi_scan_lock); | |
62 | } | |
63 | EXPORT_SYMBOL_GPL(acpi_scan_lock_release); | |
64 | ||
e525506f RW |
65 | void acpi_lock_hp_context(void) |
66 | { | |
67 | mutex_lock(&acpi_hp_context_lock); | |
68 | } | |
69 | ||
70 | void acpi_unlock_hp_context(void) | |
71 | { | |
72 | mutex_unlock(&acpi_hp_context_lock); | |
73 | } | |
74 | ||
5d513205 RW |
75 | void acpi_initialize_hp_context(struct acpi_device *adev, |
76 | struct acpi_hotplug_context *hp, | |
77 | int (*notify)(struct acpi_device *, u32), | |
78 | void (*uevent)(struct acpi_device *, u32)) | |
79 | { | |
80 | acpi_lock_hp_context(); | |
ba574dc8 RW |
81 | hp->notify = notify; |
82 | hp->uevent = uevent; | |
83 | acpi_set_hp_context(adev, hp); | |
5d513205 RW |
84 | acpi_unlock_hp_context(); |
85 | } | |
86 | EXPORT_SYMBOL_GPL(acpi_initialize_hp_context); | |
87 | ||
ca589f94 RW |
88 | int acpi_scan_add_handler(struct acpi_scan_handler *handler) |
89 | { | |
d34afa9d | 90 | if (!handler) |
ca589f94 RW |
91 | return -EINVAL; |
92 | ||
93 | list_add_tail(&handler->list_node, &acpi_scan_handlers_list); | |
94 | return 0; | |
95 | } | |
96 | ||
3f8055c3 RW |
97 | int acpi_scan_add_handler_with_hotplug(struct acpi_scan_handler *handler, |
98 | const char *hotplug_profile_name) | |
99 | { | |
100 | int error; | |
101 | ||
102 | error = acpi_scan_add_handler(handler); | |
103 | if (error) | |
104 | return error; | |
105 | ||
106 | acpi_sysfs_add_hotplug_profile(&handler->hotplug, hotplug_profile_name); | |
107 | return 0; | |
108 | } | |
109 | ||
caa73ea1 | 110 | bool acpi_scan_is_offline(struct acpi_device *adev, bool uevent) |
d22ddcbc RW |
111 | { |
112 | struct acpi_device_physical_node *pn; | |
113 | bool offline = true; | |
27664c58 | 114 | char *envp[] = { "EVENT=offline", NULL }; |
d22ddcbc | 115 | |
4c533c80 RW |
116 | /* |
117 | * acpi_container_offline() calls this for all of the container's | |
118 | * children under the container's physical_node_lock lock. | |
119 | */ | |
120 | mutex_lock_nested(&adev->physical_node_lock, SINGLE_DEPTH_NESTING); | |
d22ddcbc RW |
121 | |
122 | list_for_each_entry(pn, &adev->physical_node_list, node) | |
123 | if (device_supports_offline(pn->dev) && !pn->dev->offline) { | |
caa73ea1 | 124 | if (uevent) |
27664c58 | 125 | kobject_uevent_env(&pn->dev->kobj, KOBJ_CHANGE, envp); |
caa73ea1 | 126 | |
d22ddcbc RW |
127 | offline = false; |
128 | break; | |
129 | } | |
130 | ||
131 | mutex_unlock(&adev->physical_node_lock); | |
132 | return offline; | |
133 | } | |
134 | ||
7f28ddec RW |
135 | static acpi_status acpi_bus_offline(acpi_handle handle, u32 lvl, void *data, |
136 | void **ret_p) | |
683058e3 RW |
137 | { |
138 | struct acpi_device *device = NULL; | |
139 | struct acpi_device_physical_node *pn; | |
303bfdb1 | 140 | bool second_pass = (bool)data; |
683058e3 RW |
141 | acpi_status status = AE_OK; |
142 | ||
143 | if (acpi_bus_get_device(handle, &device)) | |
144 | return AE_OK; | |
145 | ||
7f28ddec RW |
146 | if (device->handler && !device->handler->hotplug.enabled) { |
147 | *ret_p = &device->dev; | |
148 | return AE_SUPPORT; | |
149 | } | |
150 | ||
683058e3 RW |
151 | mutex_lock(&device->physical_node_lock); |
152 | ||
153 | list_for_each_entry(pn, &device->physical_node_list, node) { | |
154 | int ret; | |
155 | ||
303bfdb1 RW |
156 | if (second_pass) { |
157 | /* Skip devices offlined by the first pass. */ | |
158 | if (pn->put_online) | |
159 | continue; | |
160 | } else { | |
161 | pn->put_online = false; | |
162 | } | |
683058e3 | 163 | ret = device_offline(pn->dev); |
303bfdb1 RW |
164 | if (ret >= 0) { |
165 | pn->put_online = !ret; | |
166 | } else { | |
167 | *ret_p = pn->dev; | |
168 | if (second_pass) { | |
169 | status = AE_ERROR; | |
170 | break; | |
171 | } | |
683058e3 | 172 | } |
683058e3 RW |
173 | } |
174 | ||
175 | mutex_unlock(&device->physical_node_lock); | |
176 | ||
177 | return status; | |
178 | } | |
179 | ||
7f28ddec RW |
180 | static acpi_status acpi_bus_online(acpi_handle handle, u32 lvl, void *data, |
181 | void **ret_p) | |
683058e3 RW |
182 | { |
183 | struct acpi_device *device = NULL; | |
184 | struct acpi_device_physical_node *pn; | |
185 | ||
186 | if (acpi_bus_get_device(handle, &device)) | |
187 | return AE_OK; | |
188 | ||
189 | mutex_lock(&device->physical_node_lock); | |
190 | ||
191 | list_for_each_entry(pn, &device->physical_node_list, node) | |
192 | if (pn->put_online) { | |
193 | device_online(pn->dev); | |
194 | pn->put_online = false; | |
195 | } | |
196 | ||
197 | mutex_unlock(&device->physical_node_lock); | |
198 | ||
199 | return AE_OK; | |
200 | } | |
201 | ||
d22ddcbc | 202 | static int acpi_scan_try_to_offline(struct acpi_device *device) |
1da177e4 | 203 | { |
5993c467 | 204 | acpi_handle handle = device->handle; |
d22ddcbc | 205 | struct device *errdev = NULL; |
a33ec399 | 206 | acpi_status status; |
f058cdf4 | 207 | |
303bfdb1 RW |
208 | /* |
209 | * Carry out two passes here and ignore errors in the first pass, | |
210 | * because if the devices in question are memory blocks and | |
211 | * CONFIG_MEMCG is set, one of the blocks may hold data structures | |
212 | * that the other blocks depend on, but it is not known in advance which | |
213 | * block holds them. | |
214 | * | |
215 | * If the first pass is successful, the second one isn't needed, though. | |
216 | */ | |
7f28ddec RW |
217 | status = acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
218 | NULL, acpi_bus_offline, (void *)false, | |
219 | (void **)&errdev); | |
220 | if (status == AE_SUPPORT) { | |
221 | dev_warn(errdev, "Offline disabled.\n"); | |
222 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, | |
223 | acpi_bus_online, NULL, NULL, NULL); | |
7f28ddec RW |
224 | return -EPERM; |
225 | } | |
226 | acpi_bus_offline(handle, 0, (void *)false, (void **)&errdev); | |
303bfdb1 RW |
227 | if (errdev) { |
228 | errdev = NULL; | |
683058e3 | 229 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
7f28ddec RW |
230 | NULL, acpi_bus_offline, (void *)true, |
231 | (void **)&errdev); | |
ffc10d82 | 232 | if (!errdev) |
7f28ddec RW |
233 | acpi_bus_offline(handle, 0, (void *)true, |
234 | (void **)&errdev); | |
303bfdb1 | 235 | |
ffc10d82 | 236 | if (errdev) { |
303bfdb1 | 237 | dev_warn(errdev, "Offline failed.\n"); |
7f28ddec | 238 | acpi_bus_online(handle, 0, NULL, NULL); |
303bfdb1 | 239 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, |
7f28ddec RW |
240 | ACPI_UINT32_MAX, acpi_bus_online, |
241 | NULL, NULL, NULL); | |
303bfdb1 RW |
242 | return -EBUSY; |
243 | } | |
683058e3 | 244 | } |
d22ddcbc RW |
245 | return 0; |
246 | } | |
247 | ||
248 | static int acpi_scan_hot_remove(struct acpi_device *device) | |
249 | { | |
250 | acpi_handle handle = device->handle; | |
251 | unsigned long long sta; | |
252 | acpi_status status; | |
253 | ||
ffc10d82 | 254 | if (device->handler && device->handler->hotplug.demand_offline) { |
caa73ea1 | 255 | if (!acpi_scan_is_offline(device, true)) |
d22ddcbc RW |
256 | return -EBUSY; |
257 | } else { | |
258 | int error = acpi_scan_try_to_offline(device); | |
259 | if (error) | |
260 | return error; | |
261 | } | |
683058e3 | 262 | |
e52d9d8c | 263 | acpi_handle_debug(handle, "Ejecting\n"); |
26d46867 | 264 | |
bfee26db | 265 | acpi_bus_trim(device); |
683058e3 | 266 | |
7d2421f8 | 267 | acpi_evaluate_lck(handle, 0); |
1da177e4 LT |
268 | /* |
269 | * TBD: _EJD support. | |
270 | */ | |
7d2421f8 JL |
271 | status = acpi_evaluate_ej0(handle); |
272 | if (status == AE_NOT_FOUND) | |
273 | return -ENODEV; | |
274 | else if (ACPI_FAILURE(status)) | |
275 | return -EIO; | |
1da177e4 | 276 | |
882fd12e TK |
277 | /* |
278 | * Verify if eject was indeed successful. If not, log an error | |
279 | * message. No need to call _OST since _EJ0 call was made OK. | |
280 | */ | |
281 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); | |
282 | if (ACPI_FAILURE(status)) { | |
283 | acpi_handle_warn(handle, | |
284 | "Status check after eject failed (0x%x)\n", status); | |
285 | } else if (sta & ACPI_STA_DEVICE_ENABLED) { | |
286 | acpi_handle_warn(handle, | |
287 | "Eject incomplete - status 0x%llx\n", sta); | |
288 | } | |
289 | ||
a33ec399 RW |
290 | return 0; |
291 | } | |
1da177e4 | 292 | |
443fc820 RW |
293 | static int acpi_scan_device_not_present(struct acpi_device *adev) |
294 | { | |
295 | if (!acpi_device_enumerated(adev)) { | |
296 | dev_warn(&adev->dev, "Still not present\n"); | |
297 | return -EALREADY; | |
298 | } | |
299 | acpi_bus_trim(adev); | |
300 | return 0; | |
301 | } | |
302 | ||
c27b2c33 | 303 | static int acpi_scan_device_check(struct acpi_device *adev) |
a33ec399 | 304 | { |
f943db40 | 305 | int error; |
a33ec399 | 306 | |
443fc820 RW |
307 | acpi_bus_get_status(adev); |
308 | if (adev->status.present || adev->status.functional) { | |
309 | /* | |
310 | * This function is only called for device objects for which | |
311 | * matching scan handlers exist. The only situation in which | |
312 | * the scan handler is not attached to this device object yet | |
313 | * is when the device has just appeared (either it wasn't | |
314 | * present at all before or it was removed and then added | |
315 | * again). | |
316 | */ | |
317 | if (adev->handler) { | |
318 | dev_warn(&adev->dev, "Already enumerated\n"); | |
319 | return -EALREADY; | |
320 | } | |
321 | error = acpi_bus_scan(adev->handle); | |
322 | if (error) { | |
323 | dev_warn(&adev->dev, "Namespace scan failure\n"); | |
324 | return error; | |
325 | } | |
326 | if (!adev->handler) { | |
327 | dev_warn(&adev->dev, "Enumeration failure\n"); | |
328 | error = -ENODEV; | |
329 | } | |
330 | } else { | |
331 | error = acpi_scan_device_not_present(adev); | |
332 | } | |
333 | return error; | |
334 | } | |
335 | ||
336 | static int acpi_scan_bus_check(struct acpi_device *adev) | |
337 | { | |
338 | struct acpi_scan_handler *handler = adev->handler; | |
339 | struct acpi_device *child; | |
340 | int error; | |
341 | ||
342 | acpi_bus_get_status(adev); | |
343 | if (!(adev->status.present || adev->status.functional)) { | |
344 | acpi_scan_device_not_present(adev); | |
345 | return 0; | |
346 | } | |
347 | if (handler && handler->hotplug.scan_dependent) | |
348 | return handler->hotplug.scan_dependent(adev); | |
349 | ||
c27b2c33 RW |
350 | error = acpi_bus_scan(adev->handle); |
351 | if (error) { | |
352 | dev_warn(&adev->dev, "Namespace scan failure\n"); | |
353 | return error; | |
354 | } | |
443fc820 RW |
355 | list_for_each_entry(child, &adev->children, node) { |
356 | error = acpi_scan_bus_check(child); | |
357 | if (error) | |
358 | return error; | |
c27b2c33 RW |
359 | } |
360 | return 0; | |
a33ec399 RW |
361 | } |
362 | ||
3c2cc7ff RW |
363 | static int acpi_generic_hotplug_event(struct acpi_device *adev, u32 type) |
364 | { | |
365 | switch (type) { | |
366 | case ACPI_NOTIFY_BUS_CHECK: | |
367 | return acpi_scan_bus_check(adev); | |
368 | case ACPI_NOTIFY_DEVICE_CHECK: | |
369 | return acpi_scan_device_check(adev); | |
370 | case ACPI_NOTIFY_EJECT_REQUEST: | |
371 | case ACPI_OST_EC_OSPM_EJECT: | |
dd2151be RW |
372 | if (adev->handler && !adev->handler->hotplug.enabled) { |
373 | dev_info(&adev->dev, "Eject disabled\n"); | |
374 | return -EPERM; | |
375 | } | |
700b8422 RW |
376 | acpi_evaluate_ost(adev->handle, ACPI_NOTIFY_EJECT_REQUEST, |
377 | ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); | |
3c2cc7ff RW |
378 | return acpi_scan_hot_remove(adev); |
379 | } | |
380 | return -EINVAL; | |
381 | } | |
382 | ||
1e3bcb59 | 383 | void acpi_device_hotplug(struct acpi_device *adev, u32 src) |
a33ec399 | 384 | { |
a33ec399 | 385 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; |
3c2cc7ff | 386 | int error = -ENODEV; |
a33ec399 | 387 | |
683058e3 | 388 | lock_device_hotplug(); |
e0ae8fee | 389 | mutex_lock(&acpi_scan_lock); |
a33ec399 | 390 | |
c27b2c33 RW |
391 | /* |
392 | * The device object's ACPI handle cannot become invalid as long as we | |
3c2cc7ff | 393 | * are holding acpi_scan_lock, but it might have become invalid before |
c27b2c33 RW |
394 | * that lock was acquired. |
395 | */ | |
396 | if (adev->handle == INVALID_ACPI_HANDLE) | |
3c2cc7ff | 397 | goto err_out; |
c27b2c33 | 398 | |
1e2380cd RW |
399 | if (adev->flags.is_dock_station) { |
400 | error = dock_notify(adev, src); | |
401 | } else if (adev->flags.hotplug_notify) { | |
3c2cc7ff RW |
402 | error = acpi_generic_hotplug_event(adev, src); |
403 | } else { | |
be27b3dc | 404 | int (*notify)(struct acpi_device *, u32); |
3c2cc7ff RW |
405 | |
406 | acpi_lock_hp_context(); | |
be27b3dc | 407 | notify = adev->hp ? adev->hp->notify : NULL; |
3c2cc7ff RW |
408 | acpi_unlock_hp_context(); |
409 | /* | |
410 | * There may be additional notify handlers for device objects | |
411 | * without the .event() callback, so ignore them here. | |
412 | */ | |
be27b3dc RW |
413 | if (notify) |
414 | error = notify(adev, src); | |
3c2cc7ff RW |
415 | else |
416 | goto out; | |
a33ec399 | 417 | } |
d429e5c1 LCY |
418 | switch (error) { |
419 | case 0: | |
c27b2c33 | 420 | ost_code = ACPI_OST_SC_SUCCESS; |
d429e5c1 LCY |
421 | break; |
422 | case -EPERM: | |
423 | ost_code = ACPI_OST_SC_EJECT_NOT_SUPPORTED; | |
424 | break; | |
425 | case -EBUSY: | |
426 | ost_code = ACPI_OST_SC_DEVICE_BUSY; | |
427 | break; | |
428 | default: | |
429 | ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; | |
430 | break; | |
431 | } | |
a33ec399 | 432 | |
3c2cc7ff | 433 | err_out: |
700b8422 | 434 | acpi_evaluate_ost(adev->handle, src, ost_code, NULL); |
3c2cc7ff RW |
435 | |
436 | out: | |
78ea4639 | 437 | acpi_bus_put_acpi_device(adev); |
a33ec399 | 438 | mutex_unlock(&acpi_scan_lock); |
e0ae8fee | 439 | unlock_device_hotplug(); |
a33ec399 RW |
440 | } |
441 | ||
0b224527 RW |
442 | static void acpi_free_power_resources_lists(struct acpi_device *device) |
443 | { | |
444 | int i; | |
445 | ||
993cbe59 RW |
446 | if (device->wakeup.flags.valid) |
447 | acpi_power_resources_list_free(&device->wakeup.resources); | |
448 | ||
1b1f3e16 | 449 | if (!device->power.flags.power_resources) |
0b224527 RW |
450 | return; |
451 | ||
452 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) { | |
453 | struct acpi_device_power_state *ps = &device->power.states[i]; | |
454 | acpi_power_resources_list_free(&ps->resources); | |
455 | } | |
7f47fa6c BH |
456 | } |
457 | ||
1890a97a | 458 | static void acpi_device_release(struct device *dev) |
1da177e4 | 459 | { |
1890a97a | 460 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1da177e4 | 461 | |
ffdcd955 | 462 | acpi_free_properties(acpi_dev); |
c0af4175 | 463 | acpi_free_pnp_ids(&acpi_dev->pnp); |
0b224527 | 464 | acpi_free_power_resources_lists(acpi_dev); |
1890a97a | 465 | kfree(acpi_dev); |
1da177e4 LT |
466 | } |
467 | ||
d783156e RW |
468 | static void acpi_device_del(struct acpi_device *device) |
469 | { | |
ca9dc8d4 LW |
470 | struct acpi_device_bus_id *acpi_device_bus_id; |
471 | ||
d783156e RW |
472 | mutex_lock(&acpi_device_lock); |
473 | if (device->parent) | |
474 | list_del(&device->node); | |
475 | ||
ca9dc8d4 LW |
476 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) |
477 | if (!strcmp(acpi_device_bus_id->bus_id, | |
478 | acpi_device_hid(device))) { | |
eb50aaf9 AS |
479 | ida_simple_remove(&acpi_device_bus_id->instance_ida, device->pnp.instance_no); |
480 | if (ida_is_empty(&acpi_device_bus_id->instance_ida)) { | |
ca9dc8d4 | 481 | list_del(&acpi_device_bus_id->node); |
a58015d6 | 482 | kfree_const(acpi_device_bus_id->bus_id); |
ca9dc8d4 LW |
483 | kfree(acpi_device_bus_id); |
484 | } | |
485 | break; | |
486 | } | |
487 | ||
d783156e RW |
488 | list_del(&device->wakeup_list); |
489 | mutex_unlock(&acpi_device_lock); | |
490 | ||
491 | acpi_power_add_remove_device(device, false); | |
492 | acpi_device_remove_files(device); | |
493 | if (device->remove) | |
494 | device->remove(device); | |
495 | ||
496 | device_del(&device->dev); | |
497 | } | |
498 | ||
68bdb677 OP |
499 | static BLOCKING_NOTIFIER_HEAD(acpi_reconfig_chain); |
500 | ||
d783156e RW |
501 | static LIST_HEAD(acpi_device_del_list); |
502 | static DEFINE_MUTEX(acpi_device_del_lock); | |
503 | ||
504 | static void acpi_device_del_work_fn(struct work_struct *work_not_used) | |
505 | { | |
506 | for (;;) { | |
507 | struct acpi_device *adev; | |
508 | ||
509 | mutex_lock(&acpi_device_del_lock); | |
510 | ||
511 | if (list_empty(&acpi_device_del_list)) { | |
512 | mutex_unlock(&acpi_device_del_lock); | |
513 | break; | |
514 | } | |
515 | adev = list_first_entry(&acpi_device_del_list, | |
516 | struct acpi_device, del_list); | |
517 | list_del(&adev->del_list); | |
518 | ||
519 | mutex_unlock(&acpi_device_del_lock); | |
520 | ||
68bdb677 OP |
521 | blocking_notifier_call_chain(&acpi_reconfig_chain, |
522 | ACPI_RECONFIG_DEVICE_REMOVE, adev); | |
523 | ||
d783156e RW |
524 | acpi_device_del(adev); |
525 | /* | |
526 | * Drop references to all power resources that might have been | |
527 | * used by the device. | |
528 | */ | |
529 | acpi_power_transition(adev, ACPI_STATE_D3_COLD); | |
4cbaba4e | 530 | acpi_dev_put(adev); |
d783156e RW |
531 | } |
532 | } | |
533 | ||
534 | /** | |
535 | * acpi_scan_drop_device - Drop an ACPI device object. | |
536 | * @handle: Handle of an ACPI namespace node, not used. | |
537 | * @context: Address of the ACPI device object to drop. | |
538 | * | |
539 | * This is invoked by acpi_ns_delete_node() during the removal of the ACPI | |
540 | * namespace node the device object pointed to by @context is attached to. | |
541 | * | |
542 | * The unregistration is carried out asynchronously to avoid running | |
543 | * acpi_device_del() under the ACPICA's namespace mutex and the list is used to | |
544 | * ensure the correct ordering (the device objects must be unregistered in the | |
545 | * same order in which the corresponding namespace nodes are deleted). | |
546 | */ | |
547 | static void acpi_scan_drop_device(acpi_handle handle, void *context) | |
caf5c03f | 548 | { |
d783156e RW |
549 | static DECLARE_WORK(work, acpi_device_del_work_fn); |
550 | struct acpi_device *adev = context; | |
551 | ||
552 | mutex_lock(&acpi_device_del_lock); | |
553 | ||
554 | /* | |
555 | * Use the ACPI hotplug workqueue which is ordered, so this work item | |
556 | * won't run after any hotplug work items submitted subsequently. That | |
557 | * prevents attempts to register device objects identical to those being | |
558 | * deleted from happening concurrently (such attempts result from | |
559 | * hotplug events handled via the ACPI hotplug workqueue). It also will | |
935ab850 | 560 | * run after all of the work items submitted previously, which helps |
d783156e RW |
561 | * those work items to ensure that they are not accessing stale device |
562 | * objects. | |
563 | */ | |
564 | if (list_empty(&acpi_device_del_list)) | |
565 | acpi_queue_hotplug_work(&work); | |
566 | ||
567 | list_add_tail(&adev->del_list, &acpi_device_del_list); | |
568 | /* Make acpi_ns_validate_handle() return NULL for this handle. */ | |
569 | adev->handle = INVALID_ACPI_HANDLE; | |
570 | ||
571 | mutex_unlock(&acpi_device_del_lock); | |
caf5c03f RW |
572 | } |
573 | ||
83e2c8fc RW |
574 | static struct acpi_device *handle_to_device(acpi_handle handle, |
575 | void (*callback)(void *)) | |
caf5c03f | 576 | { |
83e2c8fc | 577 | struct acpi_device *adev = NULL; |
caf5c03f RW |
578 | acpi_status status; |
579 | ||
78ea4639 | 580 | status = acpi_get_data_full(handle, acpi_scan_drop_device, |
83e2c8fc RW |
581 | (void **)&adev, callback); |
582 | if (ACPI_FAILURE(status) || !adev) { | |
583 | acpi_handle_debug(handle, "No context!\n"); | |
584 | return NULL; | |
caf5c03f | 585 | } |
83e2c8fc | 586 | return adev; |
caf5c03f | 587 | } |
78ea4639 RW |
588 | |
589 | int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device) | |
590 | { | |
83e2c8fc RW |
591 | if (!device) |
592 | return -EINVAL; | |
593 | ||
594 | *device = handle_to_device(handle, NULL); | |
595 | if (!*device) | |
596 | return -ENODEV; | |
597 | ||
598 | return 0; | |
78ea4639 | 599 | } |
6585925b | 600 | EXPORT_SYMBOL(acpi_bus_get_device); |
caf5c03f | 601 | |
78ea4639 RW |
602 | static void get_acpi_device(void *dev) |
603 | { | |
4cbaba4e | 604 | acpi_dev_get(dev); |
78ea4639 RW |
605 | } |
606 | ||
607 | struct acpi_device *acpi_bus_get_acpi_device(acpi_handle handle) | |
608 | { | |
83e2c8fc | 609 | return handle_to_device(handle, get_acpi_device); |
78ea4639 | 610 | } |
2c59a32d | 611 | EXPORT_SYMBOL_GPL(acpi_bus_get_acpi_device); |
78ea4639 | 612 | |
c1013ff7 RW |
613 | static struct acpi_device_bus_id *acpi_device_bus_id_match(const char *dev_id) |
614 | { | |
615 | struct acpi_device_bus_id *acpi_device_bus_id; | |
616 | ||
617 | /* Find suitable bus_id and instance number in acpi_bus_id_list. */ | |
618 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) { | |
619 | if (!strcmp(acpi_device_bus_id->bus_id, dev_id)) | |
620 | return acpi_device_bus_id; | |
621 | } | |
622 | return NULL; | |
623 | } | |
624 | ||
eb50aaf9 AS |
625 | static int acpi_device_set_name(struct acpi_device *device, |
626 | struct acpi_device_bus_id *acpi_device_bus_id) | |
627 | { | |
628 | struct ida *instance_ida = &acpi_device_bus_id->instance_ida; | |
629 | int result; | |
630 | ||
631 | result = ida_simple_get(instance_ida, 0, ACPI_MAX_DEVICE_INSTANCES, GFP_KERNEL); | |
632 | if (result < 0) | |
633 | return result; | |
634 | ||
635 | device->pnp.instance_no = result; | |
636 | dev_set_name(&device->dev, "%s:%02x", acpi_device_bus_id->bus_id, result); | |
637 | return 0; | |
638 | } | |
639 | ||
c6a493a1 | 640 | static int acpi_tie_acpi_dev(struct acpi_device *adev) |
1da177e4 | 641 | { |
c6a493a1 RW |
642 | acpi_handle handle = adev->handle; |
643 | acpi_status status; | |
66b7ed40 | 644 | |
c6a493a1 RW |
645 | if (!handle) |
646 | return 0; | |
d43e167d | 647 | |
c6a493a1 RW |
648 | status = acpi_attach_data(handle, acpi_scan_drop_device, adev); |
649 | if (ACPI_FAILURE(status)) { | |
650 | acpi_handle_err(handle, "Unable to attach device data\n"); | |
651 | return -ENODEV; | |
d43e167d RW |
652 | } |
653 | ||
c6a493a1 RW |
654 | return 0; |
655 | } | |
656 | ||
5f4ce260 RW |
657 | static int __acpi_device_add(struct acpi_device *device, |
658 | void (*release)(struct device *)) | |
1da177e4 | 659 | { |
c1013ff7 | 660 | struct acpi_device_bus_id *acpi_device_bus_id; |
4be44fcd | 661 | int result; |
66b7ed40 | 662 | |
9e89dde2 ZR |
663 | /* |
664 | * Linkage | |
665 | * ------- | |
666 | * Link this device to its parent and siblings. | |
667 | */ | |
668 | INIT_LIST_HEAD(&device->children); | |
669 | INIT_LIST_HEAD(&device->node); | |
9e89dde2 | 670 | INIT_LIST_HEAD(&device->wakeup_list); |
1033f904 | 671 | INIT_LIST_HEAD(&device->physical_node_list); |
d783156e | 672 | INIT_LIST_HEAD(&device->del_list); |
1033f904 | 673 | mutex_init(&device->physical_node_lock); |
1da177e4 | 674 | |
9090589d | 675 | mutex_lock(&acpi_device_lock); |
c1013ff7 RW |
676 | |
677 | acpi_device_bus_id = acpi_device_bus_id_match(acpi_device_hid(device)); | |
678 | if (acpi_device_bus_id) { | |
eb50aaf9 AS |
679 | result = acpi_device_set_name(device, acpi_device_bus_id); |
680 | if (result) | |
681 | goto err_unlock; | |
c1013ff7 RW |
682 | } else { |
683 | acpi_device_bus_id = kzalloc(sizeof(*acpi_device_bus_id), | |
684 | GFP_KERNEL); | |
685 | if (!acpi_device_bus_id) { | |
686 | result = -ENOMEM; | |
687 | goto err_unlock; | |
e49bd2dd | 688 | } |
a58015d6 DC |
689 | acpi_device_bus_id->bus_id = |
690 | kstrdup_const(acpi_device_hid(device), GFP_KERNEL); | |
691 | if (!acpi_device_bus_id->bus_id) { | |
c1013ff7 | 692 | kfree(acpi_device_bus_id); |
a58015d6 | 693 | result = -ENOMEM; |
c1013ff7 | 694 | goto err_unlock; |
a58015d6 DC |
695 | } |
696 | ||
eb50aaf9 AS |
697 | ida_init(&acpi_device_bus_id->instance_ida); |
698 | ||
699 | result = acpi_device_set_name(device, acpi_device_bus_id); | |
700 | if (result) { | |
0c8bd174 | 701 | kfree_const(acpi_device_bus_id->bus_id); |
eb50aaf9 AS |
702 | kfree(acpi_device_bus_id); |
703 | goto err_unlock; | |
704 | } | |
705 | ||
e49bd2dd | 706 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); |
1da177e4 LT |
707 | } |
708 | ||
33b57150 | 709 | if (device->parent) |
9e89dde2 | 710 | list_add_tail(&device->node, &device->parent->children); |
33b57150 | 711 | |
9e89dde2 ZR |
712 | if (device->wakeup.flags.valid) |
713 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); | |
5e73c518 | 714 | |
9090589d | 715 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 716 | |
1890a97a | 717 | if (device->parent) |
66b7ed40 | 718 | device->dev.parent = &device->parent->dev; |
5e73c518 | 719 | |
1890a97a | 720 | device->dev.bus = &acpi_bus_type; |
82c7d5ef | 721 | device->dev.release = release; |
cf860be6 | 722 | result = device_add(&device->dev); |
0c526d96 | 723 | if (result) { |
8b12b922 | 724 | dev_err(&device->dev, "Error registering device\n"); |
d43e167d | 725 | goto err; |
1da177e4 | 726 | } |
1da177e4 | 727 | |
e49bd2dd | 728 | result = acpi_device_setup_files(device); |
0c526d96 | 729 | if (result) |
8acf4108 | 730 | pr_err("Error creating sysfs interface for device %s\n", |
0794469d | 731 | dev_name(&device->dev)); |
1da177e4 | 732 | |
1da177e4 | 733 | return 0; |
d43e167d | 734 | |
5e73c518 | 735 | err: |
9090589d | 736 | mutex_lock(&acpi_device_lock); |
5e73c518 | 737 | |
33b57150 | 738 | if (device->parent) |
e49bd2dd | 739 | list_del(&device->node); |
a58015d6 | 740 | |
e49bd2dd | 741 | list_del(&device->wakeup_list); |
a58015d6 | 742 | |
5e73c518 | 743 | err_unlock: |
9090589d | 744 | mutex_unlock(&acpi_device_lock); |
d43e167d | 745 | |
d783156e | 746 | acpi_detach_data(device->handle, acpi_scan_drop_device); |
5e73c518 | 747 | |
e49bd2dd | 748 | return result; |
1da177e4 LT |
749 | } |
750 | ||
5f4ce260 RW |
751 | int acpi_device_add(struct acpi_device *adev, void (*release)(struct device *)) |
752 | { | |
753 | int ret; | |
754 | ||
755 | ret = acpi_tie_acpi_dev(adev); | |
756 | if (ret) | |
757 | return ret; | |
758 | ||
759 | return __acpi_device_add(adev, release); | |
760 | } | |
761 | ||
9e89dde2 ZR |
762 | /* -------------------------------------------------------------------------- |
763 | Device Enumeration | |
764 | -------------------------------------------------------------------------- */ | |
2ef33ee7 RW |
765 | static bool acpi_info_matches_ids(struct acpi_device_info *info, |
766 | const char * const ids[]) | |
637b9f1a | 767 | { |
2ef33ee7 | 768 | struct acpi_pnp_device_id_list *cid_list = NULL; |
02050558 | 769 | int i, index; |
637b9f1a HG |
770 | |
771 | if (!(info->valid & ACPI_VALID_HID)) | |
772 | return false; | |
773 | ||
02050558 AS |
774 | index = match_string(ids, -1, info->hardware_id.string); |
775 | if (index >= 0) | |
776 | return true; | |
777 | ||
2ef33ee7 RW |
778 | if (info->valid & ACPI_VALID_CID) |
779 | cid_list = &info->compatible_id_list; | |
780 | ||
02050558 AS |
781 | if (!cid_list) |
782 | return false; | |
2ef33ee7 | 783 | |
02050558 AS |
784 | for (i = 0; i < cid_list->count; i++) { |
785 | index = match_string(ids, -1, cid_list->ids[i].string); | |
786 | if (index >= 0) | |
637b9f1a HG |
787 | return true; |
788 | } | |
789 | ||
790 | return false; | |
791 | } | |
792 | ||
793 | /* List of HIDs for which we ignore matching ACPI devices, when checking _DEP lists. */ | |
2ef33ee7 | 794 | static const char * const acpi_ignore_dep_ids[] = { |
2ef33ee7 | 795 | "PNP0D80", /* Windows-compatible System Power Management Controller */ |
9272e97a | 796 | "INT33BD", /* Intel Baytrail Mailbox Device */ |
637b9f1a HG |
797 | NULL |
798 | }; | |
799 | ||
5c478f49 BH |
800 | static struct acpi_device *acpi_bus_get_parent(acpi_handle handle) |
801 | { | |
456de893 | 802 | struct acpi_device *device = NULL; |
5c478f49 | 803 | acpi_status status; |
5c478f49 BH |
804 | |
805 | /* | |
806 | * Fixed hardware devices do not appear in the namespace and do not | |
807 | * have handles, but we fabricate acpi_devices for them, so we have | |
808 | * to deal with them specially. | |
809 | */ | |
456de893 | 810 | if (!handle) |
5c478f49 BH |
811 | return acpi_root; |
812 | ||
813 | do { | |
814 | status = acpi_get_parent(handle, &handle); | |
5c478f49 | 815 | if (ACPI_FAILURE(status)) |
456de893 RW |
816 | return status == AE_NULL_ENTRY ? NULL : acpi_root; |
817 | } while (acpi_bus_get_device(handle, &device)); | |
818 | return device; | |
5c478f49 BH |
819 | } |
820 | ||
9e89dde2 ZR |
821 | acpi_status |
822 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) | |
823 | { | |
824 | acpi_status status; | |
825 | acpi_handle tmp; | |
826 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
827 | union acpi_object *obj; | |
828 | ||
829 | status = acpi_get_handle(handle, "_EJD", &tmp); | |
830 | if (ACPI_FAILURE(status)) | |
831 | return status; | |
832 | ||
833 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); | |
834 | if (ACPI_SUCCESS(status)) { | |
835 | obj = buffer.pointer; | |
3b5fee59 HM |
836 | status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer, |
837 | ejd); | |
9e89dde2 ZR |
838 | kfree(buffer.pointer); |
839 | } | |
840 | return status; | |
841 | } | |
842 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); | |
843 | ||
40381a3c | 844 | static int acpi_bus_extract_wakeup_device_power_package(struct acpi_device *dev) |
9e89dde2 | 845 | { |
40381a3c BH |
846 | acpi_handle handle = dev->handle; |
847 | struct acpi_device_wakeup *wakeup = &dev->wakeup; | |
b581a7f9 RW |
848 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
849 | union acpi_object *package = NULL; | |
9e89dde2 | 850 | union acpi_object *element = NULL; |
b581a7f9 | 851 | acpi_status status; |
e88c9c60 | 852 | int err = -ENODATA; |
9e89dde2 | 853 | |
993cbe59 | 854 | INIT_LIST_HEAD(&wakeup->resources); |
9e89dde2 | 855 | |
b581a7f9 RW |
856 | /* _PRW */ |
857 | status = acpi_evaluate_object(handle, "_PRW", NULL, &buffer); | |
858 | if (ACPI_FAILURE(status)) { | |
e52d9d8c RW |
859 | acpi_handle_info(handle, "_PRW evaluation failed: %s\n", |
860 | acpi_format_exception(status)); | |
e88c9c60 | 861 | return err; |
b581a7f9 RW |
862 | } |
863 | ||
864 | package = (union acpi_object *)buffer.pointer; | |
865 | ||
e88c9c60 | 866 | if (!package || package->package.count < 2) |
b581a7f9 | 867 | goto out; |
b581a7f9 | 868 | |
9e89dde2 | 869 | element = &(package->package.elements[0]); |
e88c9c60 | 870 | if (!element) |
b581a7f9 | 871 | goto out; |
e88c9c60 | 872 | |
9e89dde2 ZR |
873 | if (element->type == ACPI_TYPE_PACKAGE) { |
874 | if ((element->package.count < 2) || | |
875 | (element->package.elements[0].type != | |
876 | ACPI_TYPE_LOCAL_REFERENCE) | |
e88c9c60 | 877 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) |
b581a7f9 | 878 | goto out; |
e88c9c60 | 879 | |
b581a7f9 | 880 | wakeup->gpe_device = |
9e89dde2 | 881 | element->package.elements[0].reference.handle; |
b581a7f9 | 882 | wakeup->gpe_number = |
9e89dde2 ZR |
883 | (u32) element->package.elements[1].integer.value; |
884 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
b581a7f9 RW |
885 | wakeup->gpe_device = NULL; |
886 | wakeup->gpe_number = element->integer.value; | |
887 | } else { | |
b581a7f9 RW |
888 | goto out; |
889 | } | |
9e89dde2 ZR |
890 | |
891 | element = &(package->package.elements[1]); | |
e88c9c60 | 892 | if (element->type != ACPI_TYPE_INTEGER) |
b581a7f9 | 893 | goto out; |
e88c9c60 | 894 | |
b581a7f9 | 895 | wakeup->sleep_state = element->integer.value; |
9e89dde2 | 896 | |
e88c9c60 RW |
897 | err = acpi_extract_power_resources(package, 2, &wakeup->resources); |
898 | if (err) | |
b581a7f9 | 899 | goto out; |
9e89dde2 | 900 | |
0596a52b RW |
901 | if (!list_empty(&wakeup->resources)) { |
902 | int sleep_state; | |
9e89dde2 | 903 | |
b5d667eb RW |
904 | err = acpi_power_wakeup_list_init(&wakeup->resources, |
905 | &sleep_state); | |
906 | if (err) { | |
907 | acpi_handle_warn(handle, "Retrieving current states " | |
908 | "of wakeup power resources failed\n"); | |
909 | acpi_power_resources_list_free(&wakeup->resources); | |
910 | goto out; | |
911 | } | |
0596a52b RW |
912 | if (sleep_state < wakeup->sleep_state) { |
913 | acpi_handle_warn(handle, "Overriding _PRW sleep state " | |
914 | "(S%d) by S%d from power resources\n", | |
915 | (int)wakeup->sleep_state, sleep_state); | |
916 | wakeup->sleep_state = sleep_state; | |
917 | } | |
918 | } | |
9874647b | 919 | |
b581a7f9 RW |
920 | out: |
921 | kfree(buffer.pointer); | |
e88c9c60 | 922 | return err; |
1da177e4 LT |
923 | } |
924 | ||
a1a66393 | 925 | static bool acpi_wakeup_gpe_init(struct acpi_device *device) |
1da177e4 | 926 | { |
0519ade7 | 927 | static const struct acpi_device_id button_device_ids[] = { |
5ceb5f05 BH |
928 | {"PNP0C0C", 0}, /* Power button */ |
929 | {"PNP0C0D", 0}, /* Lid */ | |
930 | {"PNP0C0E", 0}, /* Sleep button */ | |
29b71a1c TR |
931 | {"", 0}, |
932 | }; | |
bd9b2f9a | 933 | struct acpi_device_wakeup *wakeup = &device->wakeup; |
f517709d | 934 | acpi_status status; |
f517709d | 935 | |
bd9b2f9a | 936 | wakeup->flags.notifier_present = 0; |
f517709d RW |
937 | |
938 | /* Power button, Lid switch always enable wakeup */ | |
939 | if (!acpi_match_device_ids(device, button_device_ids)) { | |
b7e38304 ZR |
940 | if (!acpi_match_device_ids(device, &button_device_ids[1])) { |
941 | /* Do not use Lid/sleep button for S5 wakeup */ | |
bd9b2f9a RW |
942 | if (wakeup->sleep_state == ACPI_STATE_S5) |
943 | wakeup->sleep_state = ACPI_STATE_S4; | |
b7e38304 | 944 | } |
bd9b2f9a | 945 | acpi_mark_gpe_for_wake(wakeup->gpe_device, wakeup->gpe_number); |
f2b56bc8 | 946 | device_set_wakeup_capable(&device->dev, true); |
a1a66393 | 947 | return true; |
f517709d RW |
948 | } |
949 | ||
a1a66393 RW |
950 | status = acpi_setup_gpe_for_wake(device->handle, wakeup->gpe_device, |
951 | wakeup->gpe_number); | |
952 | return ACPI_SUCCESS(status); | |
f517709d RW |
953 | } |
954 | ||
d57d09a4 | 955 | static void acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
f517709d | 956 | { |
e88c9c60 | 957 | int err; |
29b71a1c | 958 | |
d57d09a4 | 959 | /* Presence of _PRW indicates wake capable */ |
952c63e9 | 960 | if (!acpi_has_method(device->handle, "_PRW")) |
d57d09a4 RW |
961 | return; |
962 | ||
40381a3c | 963 | err = acpi_bus_extract_wakeup_device_power_package(device); |
e88c9c60 | 964 | if (err) { |
e52d9d8c | 965 | dev_err(&device->dev, "Unable to extract wakeup power resources"); |
d57d09a4 | 966 | return; |
9e89dde2 | 967 | } |
1da177e4 | 968 | |
a1a66393 | 969 | device->wakeup.flags.valid = acpi_wakeup_gpe_init(device); |
9b83ccd2 | 970 | device->wakeup.prepare_count = 0; |
a1a66393 RW |
971 | /* |
972 | * Call _PSW/_DSW object to disable its ability to wake the sleeping | |
729b2bdb | 973 | * system for the ACPI device with the _PRW object. |
603fadf3 | 974 | * The _PSW object is deprecated in ACPI 3.0 and is replaced by _DSW. |
729b2bdb ZY |
975 | * So it is necessary to call _DSW object first. Only when it is not |
976 | * present will the _PSW object used. | |
977 | */ | |
e88c9c60 RW |
978 | err = acpi_device_sleep_wake(device, 0, 0, 0); |
979 | if (err) | |
05de0686 | 980 | pr_debug("error in _DSW or _PSW evaluation\n"); |
1da177e4 | 981 | } |
1da177e4 | 982 | |
f33ce568 RW |
983 | static void acpi_bus_init_power_state(struct acpi_device *device, int state) |
984 | { | |
985 | struct acpi_device_power_state *ps = &device->power.states[state]; | |
ef85bdbe RW |
986 | char pathname[5] = { '_', 'P', 'R', '0' + state, '\0' }; |
987 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
f33ce568 | 988 | acpi_status status; |
bf325f95 | 989 | |
f33ce568 RW |
990 | INIT_LIST_HEAD(&ps->resources); |
991 | ||
ef85bdbe RW |
992 | /* Evaluate "_PRx" to get referenced power resources */ |
993 | status = acpi_evaluate_object(device->handle, pathname, NULL, &buffer); | |
994 | if (ACPI_SUCCESS(status)) { | |
995 | union acpi_object *package = buffer.pointer; | |
996 | ||
997 | if (buffer.length && package | |
998 | && package->type == ACPI_TYPE_PACKAGE | |
956ad9d9 RW |
999 | && package->package.count) |
1000 | acpi_extract_power_resources(package, 0, &ps->resources); | |
1001 | ||
ef85bdbe | 1002 | ACPI_FREE(buffer.pointer); |
f33ce568 RW |
1003 | } |
1004 | ||
1005 | /* Evaluate "_PSx" to see if we can do explicit sets */ | |
ef85bdbe | 1006 | pathname[2] = 'S'; |
952c63e9 | 1007 | if (acpi_has_method(device->handle, pathname)) |
f33ce568 RW |
1008 | ps->flags.explicit_set = 1; |
1009 | ||
20dacb71 RW |
1010 | /* State is valid if there are means to put the device into it. */ |
1011 | if (!list_empty(&ps->resources) || ps->flags.explicit_set) | |
f33ce568 | 1012 | ps->flags.valid = 1; |
f33ce568 RW |
1013 | |
1014 | ps->power = -1; /* Unknown - driver assigned */ | |
1015 | ps->latency = -1; /* Unknown - driver assigned */ | |
1016 | } | |
1017 | ||
d43e167d | 1018 | static void acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 1019 | { |
8bc5053b | 1020 | u32 i; |
1a365616 | 1021 | |
d43e167d | 1022 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ |
952c63e9 JL |
1023 | if (!acpi_has_method(device->handle, "_PS0") && |
1024 | !acpi_has_method(device->handle, "_PR0")) | |
1025 | return; | |
1a365616 | 1026 | |
d43e167d | 1027 | device->flags.power_manageable = 1; |
4be44fcd | 1028 | |
9e89dde2 ZR |
1029 | /* |
1030 | * Power Management Flags | |
1031 | */ | |
952c63e9 | 1032 | if (acpi_has_method(device->handle, "_PSC")) |
9e89dde2 | 1033 | device->power.flags.explicit_get = 1; |
f25c0ae2 | 1034 | |
952c63e9 | 1035 | if (acpi_has_method(device->handle, "_IRC")) |
9e89dde2 | 1036 | device->power.flags.inrush_current = 1; |
1da177e4 | 1037 | |
f25c0ae2 RW |
1038 | if (acpi_has_method(device->handle, "_DSW")) |
1039 | device->power.flags.dsw_present = 1; | |
1040 | ||
9e89dde2 ZR |
1041 | /* |
1042 | * Enumerate supported power management states | |
1043 | */ | |
f33ce568 RW |
1044 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) |
1045 | acpi_bus_init_power_state(device, i); | |
bf325f95 | 1046 | |
0b224527 | 1047 | INIT_LIST_HEAD(&device->power.states[ACPI_STATE_D3_COLD].resources); |
1da177e4 | 1048 | |
956ad9d9 | 1049 | /* Set the defaults for D0 and D3hot (always supported). */ |
9e89dde2 ZR |
1050 | device->power.states[ACPI_STATE_D0].flags.valid = 1; |
1051 | device->power.states[ACPI_STATE_D0].power = 100; | |
20dacb71 | 1052 | device->power.states[ACPI_STATE_D3_HOT].flags.valid = 1; |
1399dfcd | 1053 | |
956ad9d9 RW |
1054 | /* |
1055 | * Use power resources only if the D0 list of them is populated, because | |
1056 | * some platforms may provide _PR3 only to indicate D3cold support and | |
1057 | * in those cases the power resources list returned by it may be bogus. | |
1058 | */ | |
1059 | if (!list_empty(&device->power.states[ACPI_STATE_D0].resources)) { | |
1060 | device->power.flags.power_resources = 1; | |
1061 | /* | |
1062 | * D3cold is supported if the D3hot list of power resources is | |
1063 | * not empty. | |
1064 | */ | |
1065 | if (!list_empty(&device->power.states[ACPI_STATE_D3_HOT].resources)) | |
1066 | device->power.states[ACPI_STATE_D3_COLD].flags.valid = 1; | |
1067 | } | |
1068 | ||
1b1f3e16 | 1069 | if (acpi_bus_init_power(device)) |
b3785492 | 1070 | device->flags.power_manageable = 0; |
9e89dde2 | 1071 | } |
c8f7a62c | 1072 | |
d43e167d | 1073 | static void acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 1074 | { |
1da177e4 | 1075 | /* Presence of _STA indicates 'dynamic_status' */ |
952c63e9 | 1076 | if (acpi_has_method(device->handle, "_STA")) |
1da177e4 LT |
1077 | device->flags.dynamic_status = 1; |
1078 | ||
1da177e4 | 1079 | /* Presence of _RMV indicates 'removable' */ |
952c63e9 | 1080 | if (acpi_has_method(device->handle, "_RMV")) |
1da177e4 LT |
1081 | device->flags.removable = 1; |
1082 | ||
1083 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
952c63e9 JL |
1084 | if (acpi_has_method(device->handle, "_EJD") || |
1085 | acpi_has_method(device->handle, "_EJ0")) | |
1da177e4 | 1086 | device->flags.ejectable = 1; |
1da177e4 LT |
1087 | } |
1088 | ||
c7bcb4e9 | 1089 | static void acpi_device_get_busid(struct acpi_device *device) |
1da177e4 | 1090 | { |
4be44fcd LB |
1091 | char bus_id[5] = { '?', 0 }; |
1092 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
1093 | int i = 0; | |
1da177e4 LT |
1094 | |
1095 | /* | |
1096 | * Bus ID | |
1097 | * ------ | |
1098 | * The device's Bus ID is simply the object name. | |
1099 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
1100 | */ | |
859ac9a4 | 1101 | if (ACPI_IS_ROOT_DEVICE(device)) { |
1da177e4 | 1102 | strcpy(device->pnp.bus_id, "ACPI"); |
859ac9a4 BH |
1103 | return; |
1104 | } | |
1105 | ||
1106 | switch (device->device_type) { | |
1da177e4 LT |
1107 | case ACPI_BUS_TYPE_POWER_BUTTON: |
1108 | strcpy(device->pnp.bus_id, "PWRF"); | |
1109 | break; | |
1110 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
1111 | strcpy(device->pnp.bus_id, "SLPF"); | |
1112 | break; | |
a64a62ce LZ |
1113 | case ACPI_BUS_TYPE_ECDT_EC: |
1114 | strcpy(device->pnp.bus_id, "ECDT"); | |
1115 | break; | |
1da177e4 | 1116 | default: |
66b7ed40 | 1117 | acpi_get_name(device->handle, ACPI_SINGLE_NAME, &buffer); |
1da177e4 LT |
1118 | /* Clean up trailing underscores (if any) */ |
1119 | for (i = 3; i > 1; i--) { | |
1120 | if (bus_id[i] == '_') | |
1121 | bus_id[i] = '\0'; | |
1122 | else | |
1123 | break; | |
1124 | } | |
1125 | strcpy(device->pnp.bus_id, bus_id); | |
1126 | break; | |
1127 | } | |
1128 | } | |
1129 | ||
ebf4df8d JL |
1130 | /* |
1131 | * acpi_ata_match - see if an acpi object is an ATA device | |
1132 | * | |
1133 | * If an acpi object has one of the ACPI ATA methods defined, | |
1134 | * then we can safely call it an ATA device. | |
1135 | */ | |
1136 | bool acpi_ata_match(acpi_handle handle) | |
1137 | { | |
1138 | return acpi_has_method(handle, "_GTF") || | |
1139 | acpi_has_method(handle, "_GTM") || | |
1140 | acpi_has_method(handle, "_STM") || | |
1141 | acpi_has_method(handle, "_SDD"); | |
1142 | } | |
1143 | ||
54735266 | 1144 | /* |
d4e1a692 | 1145 | * acpi_bay_match - see if an acpi object is an ejectable driver bay |
54735266 ZR |
1146 | * |
1147 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, | |
1148 | * then we can safely call it an ejectable drive bay | |
1149 | */ | |
ebf4df8d | 1150 | bool acpi_bay_match(acpi_handle handle) |
d4e1a692 | 1151 | { |
54735266 ZR |
1152 | acpi_handle phandle; |
1153 | ||
952c63e9 | 1154 | if (!acpi_has_method(handle, "_EJ0")) |
ebf4df8d JL |
1155 | return false; |
1156 | if (acpi_ata_match(handle)) | |
1157 | return true; | |
1158 | if (ACPI_FAILURE(acpi_get_parent(handle, &phandle))) | |
1159 | return false; | |
54735266 | 1160 | |
ebf4df8d | 1161 | return acpi_ata_match(phandle); |
54735266 ZR |
1162 | } |
1163 | ||
b43109fa | 1164 | bool acpi_device_is_battery(struct acpi_device *adev) |
1e2380cd | 1165 | { |
b43109fa | 1166 | struct acpi_hardware_id *hwid; |
1e2380cd | 1167 | |
b43109fa RW |
1168 | list_for_each_entry(hwid, &adev->pnp.ids, list) |
1169 | if (!strcmp("PNP0C0A", hwid->id)) | |
1170 | return true; | |
1e2380cd | 1171 | |
b43109fa | 1172 | return false; |
1e2380cd RW |
1173 | } |
1174 | ||
b43109fa | 1175 | static bool is_ejectable_bay(struct acpi_device *adev) |
1e2380cd | 1176 | { |
b43109fa RW |
1177 | acpi_handle handle = adev->handle; |
1178 | ||
1179 | if (acpi_has_method(handle, "_EJ0") && acpi_device_is_battery(adev)) | |
1e2380cd RW |
1180 | return true; |
1181 | ||
1182 | return acpi_bay_match(handle); | |
1183 | } | |
1184 | ||
3620f2f2 | 1185 | /* |
d4e1a692 | 1186 | * acpi_dock_match - see if an acpi object has a _DCK method |
3620f2f2 | 1187 | */ |
ebf4df8d | 1188 | bool acpi_dock_match(acpi_handle handle) |
3620f2f2 | 1189 | { |
ebf4df8d | 1190 | return acpi_has_method(handle, "_DCK"); |
3620f2f2 FS |
1191 | } |
1192 | ||
adc8bb8e HG |
1193 | static acpi_status |
1194 | acpi_backlight_cap_match(acpi_handle handle, u32 level, void *context, | |
1195 | void **return_value) | |
1196 | { | |
1197 | long *cap = context; | |
1198 | ||
1199 | if (acpi_has_method(handle, "_BCM") && | |
1200 | acpi_has_method(handle, "_BCL")) { | |
e52d9d8c | 1201 | acpi_handle_debug(handle, "Found generic backlight support\n"); |
adc8bb8e | 1202 | *cap |= ACPI_VIDEO_BACKLIGHT; |
adc8bb8e HG |
1203 | /* We have backlight support, no need to scan further */ |
1204 | return AE_CTRL_TERMINATE; | |
1205 | } | |
1206 | return 0; | |
1207 | } | |
1208 | ||
1209 | /* Returns true if the ACPI object is a video device which can be | |
1210 | * handled by video.ko. | |
1211 | * The device will get a Linux specific CID added in scan.c to | |
1212 | * identify the device as an ACPI graphics device | |
1213 | * Be aware that the graphics device may not be physically present | |
1214 | * Use acpi_video_get_capabilities() to detect general ACPI video | |
1215 | * capabilities of present cards | |
1216 | */ | |
1217 | long acpi_is_video_device(acpi_handle handle) | |
1218 | { | |
1219 | long video_caps = 0; | |
1220 | ||
1221 | /* Is this device able to support video switching ? */ | |
1222 | if (acpi_has_method(handle, "_DOD") || acpi_has_method(handle, "_DOS")) | |
1223 | video_caps |= ACPI_VIDEO_OUTPUT_SWITCHING; | |
1224 | ||
1225 | /* Is this device able to retrieve a video ROM ? */ | |
1226 | if (acpi_has_method(handle, "_ROM")) | |
1227 | video_caps |= ACPI_VIDEO_ROM_AVAILABLE; | |
1228 | ||
1229 | /* Is this device able to configure which video head to be POSTed ? */ | |
1230 | if (acpi_has_method(handle, "_VPO") && | |
1231 | acpi_has_method(handle, "_GPD") && | |
1232 | acpi_has_method(handle, "_SPD")) | |
1233 | video_caps |= ACPI_VIDEO_DEVICE_POSTING; | |
1234 | ||
1235 | /* Only check for backlight functionality if one of the above hit. */ | |
1236 | if (video_caps) | |
1237 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, | |
1238 | ACPI_UINT32_MAX, acpi_backlight_cap_match, NULL, | |
1239 | &video_caps, NULL); | |
1240 | ||
1241 | return video_caps; | |
1242 | } | |
1243 | EXPORT_SYMBOL(acpi_is_video_device); | |
1244 | ||
620e112c | 1245 | const char *acpi_device_hid(struct acpi_device *device) |
15b8dd53 | 1246 | { |
7f47fa6c | 1247 | struct acpi_hardware_id *hid; |
15b8dd53 | 1248 | |
2b2ae7c7 TR |
1249 | if (list_empty(&device->pnp.ids)) |
1250 | return dummy_hid; | |
1251 | ||
7f47fa6c BH |
1252 | hid = list_first_entry(&device->pnp.ids, struct acpi_hardware_id, list); |
1253 | return hid->id; | |
1254 | } | |
1255 | EXPORT_SYMBOL(acpi_device_hid); | |
15b8dd53 | 1256 | |
d4e1a692 | 1257 | static void acpi_add_id(struct acpi_device_pnp *pnp, const char *dev_id) |
7f47fa6c BH |
1258 | { |
1259 | struct acpi_hardware_id *id; | |
15b8dd53 | 1260 | |
7f47fa6c BH |
1261 | id = kmalloc(sizeof(*id), GFP_KERNEL); |
1262 | if (!id) | |
1263 | return; | |
15b8dd53 | 1264 | |
6a0d12ef | 1265 | id->id = kstrdup_const(dev_id, GFP_KERNEL); |
7f47fa6c BH |
1266 | if (!id->id) { |
1267 | kfree(id); | |
1268 | return; | |
15b8dd53 BM |
1269 | } |
1270 | ||
d4e1a692 TK |
1271 | list_add_tail(&id->list, &pnp->ids); |
1272 | pnp->type.hardware_id = 1; | |
15b8dd53 BM |
1273 | } |
1274 | ||
222e82ac DW |
1275 | /* |
1276 | * Old IBM workstations have a DSDT bug wherein the SMBus object | |
1277 | * lacks the SMBUS01 HID and the methods do not have the necessary "_" | |
1278 | * prefix. Work around this. | |
1279 | */ | |
ebf4df8d | 1280 | static bool acpi_ibm_smbus_match(acpi_handle handle) |
222e82ac | 1281 | { |
ebf4df8d JL |
1282 | char node_name[ACPI_PATH_SEGMENT_LENGTH]; |
1283 | struct acpi_buffer path = { sizeof(node_name), node_name }; | |
222e82ac DW |
1284 | |
1285 | if (!dmi_name_in_vendors("IBM")) | |
ebf4df8d | 1286 | return false; |
222e82ac DW |
1287 | |
1288 | /* Look for SMBS object */ | |
ebf4df8d JL |
1289 | if (ACPI_FAILURE(acpi_get_name(handle, ACPI_SINGLE_NAME, &path)) || |
1290 | strcmp("SMBS", path.pointer)) | |
1291 | return false; | |
222e82ac DW |
1292 | |
1293 | /* Does it have the necessary (but misnamed) methods? */ | |
952c63e9 JL |
1294 | if (acpi_has_method(handle, "SBI") && |
1295 | acpi_has_method(handle, "SBR") && | |
1296 | acpi_has_method(handle, "SBW")) | |
ebf4df8d JL |
1297 | return true; |
1298 | ||
1299 | return false; | |
222e82ac DW |
1300 | } |
1301 | ||
ae3caa80 JL |
1302 | static bool acpi_object_is_system_bus(acpi_handle handle) |
1303 | { | |
1304 | acpi_handle tmp; | |
1305 | ||
1306 | if (ACPI_SUCCESS(acpi_get_handle(NULL, "\\_SB", &tmp)) && | |
1307 | tmp == handle) | |
1308 | return true; | |
1309 | if (ACPI_SUCCESS(acpi_get_handle(NULL, "\\_TZ", &tmp)) && | |
1310 | tmp == handle) | |
1311 | return true; | |
1312 | ||
1313 | return false; | |
1314 | } | |
1315 | ||
c0af4175 | 1316 | static void acpi_set_pnp_ids(acpi_handle handle, struct acpi_device_pnp *pnp, |
c830dbcf | 1317 | int device_type) |
1da177e4 | 1318 | { |
c830dbcf | 1319 | struct acpi_device_info *info = NULL; |
78e25fef | 1320 | struct acpi_pnp_device_id_list *cid_list; |
7f47fa6c | 1321 | int i; |
1da177e4 | 1322 | |
c0af4175 | 1323 | switch (device_type) { |
1da177e4 | 1324 | case ACPI_BUS_TYPE_DEVICE: |
c0af4175 TK |
1325 | if (handle == ACPI_ROOT_OBJECT) { |
1326 | acpi_add_id(pnp, ACPI_SYSTEM_HID); | |
859ac9a4 BH |
1327 | break; |
1328 | } | |
1329 | ||
c830dbcf | 1330 | acpi_get_object_info(handle, &info); |
6091b263 | 1331 | if (!info) { |
8acf4108 | 1332 | pr_err("%s: Error reading device info\n", __func__); |
1da177e4 LT |
1333 | return; |
1334 | } | |
1335 | ||
549e6845 | 1336 | if (info->valid & ACPI_VALID_HID) { |
c0af4175 | 1337 | acpi_add_id(pnp, info->hardware_id.string); |
549e6845 RW |
1338 | pnp->type.platform_id = 1; |
1339 | } | |
57f3674f | 1340 | if (info->valid & ACPI_VALID_CID) { |
15b8dd53 | 1341 | cid_list = &info->compatible_id_list; |
57f3674f | 1342 | for (i = 0; i < cid_list->count; i++) |
c0af4175 | 1343 | acpi_add_id(pnp, cid_list->ids[i].string); |
57f3674f | 1344 | } |
1da177e4 | 1345 | if (info->valid & ACPI_VALID_ADR) { |
c0af4175 TK |
1346 | pnp->bus_address = info->address; |
1347 | pnp->type.bus_address = 1; | |
1da177e4 | 1348 | } |
ccf78040 | 1349 | if (info->valid & ACPI_VALID_UID) |
c0af4175 | 1350 | pnp->unique_id = kstrdup(info->unique_id.string, |
ccf78040 | 1351 | GFP_KERNEL); |
26095a01 SS |
1352 | if (info->valid & ACPI_VALID_CLS) |
1353 | acpi_add_id(pnp, info->class_code.string); | |
ae843332 | 1354 | |
c830dbcf RW |
1355 | kfree(info); |
1356 | ||
57f3674f BH |
1357 | /* |
1358 | * Some devices don't reliably have _HIDs & _CIDs, so add | |
1359 | * synthetic HIDs to make sure drivers can find them. | |
1360 | */ | |
c0af4175 TK |
1361 | if (acpi_is_video_device(handle)) |
1362 | acpi_add_id(pnp, ACPI_VIDEO_HID); | |
ebf4df8d | 1363 | else if (acpi_bay_match(handle)) |
c0af4175 | 1364 | acpi_add_id(pnp, ACPI_BAY_HID); |
ebf4df8d | 1365 | else if (acpi_dock_match(handle)) |
c0af4175 | 1366 | acpi_add_id(pnp, ACPI_DOCK_HID); |
ebf4df8d | 1367 | else if (acpi_ibm_smbus_match(handle)) |
c0af4175 | 1368 | acpi_add_id(pnp, ACPI_SMBUS_IBM_HID); |
ae3caa80 JL |
1369 | else if (list_empty(&pnp->ids) && |
1370 | acpi_object_is_system_bus(handle)) { | |
1371 | /* \_SB, \_TZ, LNXSYBUS */ | |
1372 | acpi_add_id(pnp, ACPI_BUS_HID); | |
c0af4175 TK |
1373 | strcpy(pnp->device_name, ACPI_BUS_DEVICE_NAME); |
1374 | strcpy(pnp->device_class, ACPI_BUS_CLASS); | |
b7b30de5 | 1375 | } |
54735266 | 1376 | |
1da177e4 LT |
1377 | break; |
1378 | case ACPI_BUS_TYPE_POWER: | |
c0af4175 | 1379 | acpi_add_id(pnp, ACPI_POWER_HID); |
1da177e4 LT |
1380 | break; |
1381 | case ACPI_BUS_TYPE_PROCESSOR: | |
c0af4175 | 1382 | acpi_add_id(pnp, ACPI_PROCESSOR_OBJECT_HID); |
1da177e4 | 1383 | break; |
1da177e4 | 1384 | case ACPI_BUS_TYPE_THERMAL: |
c0af4175 | 1385 | acpi_add_id(pnp, ACPI_THERMAL_HID); |
1da177e4 LT |
1386 | break; |
1387 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
c0af4175 | 1388 | acpi_add_id(pnp, ACPI_BUTTON_HID_POWERF); |
1da177e4 LT |
1389 | break; |
1390 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
c0af4175 | 1391 | acpi_add_id(pnp, ACPI_BUTTON_HID_SLEEPF); |
1da177e4 | 1392 | break; |
a64a62ce LZ |
1393 | case ACPI_BUS_TYPE_ECDT_EC: |
1394 | acpi_add_id(pnp, ACPI_ECDT_HID); | |
1395 | break; | |
1da177e4 | 1396 | } |
1da177e4 LT |
1397 | } |
1398 | ||
c0af4175 TK |
1399 | void acpi_free_pnp_ids(struct acpi_device_pnp *pnp) |
1400 | { | |
1401 | struct acpi_hardware_id *id, *tmp; | |
1402 | ||
1403 | list_for_each_entry_safe(id, tmp, &pnp->ids, list) { | |
6a0d12ef | 1404 | kfree_const(id->id); |
c0af4175 TK |
1405 | kfree(id); |
1406 | } | |
1407 | kfree(pnp->unique_id); | |
1408 | } | |
1409 | ||
b84f196d SS |
1410 | /** |
1411 | * acpi_dma_supported - Check DMA support for the specified device. | |
1412 | * @adev: The pointer to acpi device | |
1413 | * | |
1414 | * Return false if DMA is not supported. Otherwise, return true | |
1415 | */ | |
3d7c821c | 1416 | bool acpi_dma_supported(const struct acpi_device *adev) |
b84f196d SS |
1417 | { |
1418 | if (!adev) | |
1419 | return false; | |
1420 | ||
1421 | if (adev->flags.cca_seen) | |
1422 | return true; | |
1423 | ||
1424 | /* | |
1425 | * Per ACPI 6.0 sec 6.2.17, assume devices can do cache-coherent | |
1426 | * DMA on "Intel platforms". Presumably that includes all x86 and | |
1427 | * ia64, and other arches will set CONFIG_ACPI_CCA_REQUIRED=y. | |
1428 | */ | |
1429 | if (!IS_ENABLED(CONFIG_ACPI_CCA_REQUIRED)) | |
1430 | return true; | |
1431 | ||
1432 | return false; | |
1433 | } | |
1434 | ||
1435 | /** | |
1436 | * acpi_get_dma_attr - Check the supported DMA attr for the specified device. | |
1437 | * @adev: The pointer to acpi device | |
1438 | * | |
1439 | * Return enum dev_dma_attr. | |
1440 | */ | |
1441 | enum dev_dma_attr acpi_get_dma_attr(struct acpi_device *adev) | |
1442 | { | |
1443 | if (!acpi_dma_supported(adev)) | |
1444 | return DEV_DMA_NOT_SUPPORTED; | |
1445 | ||
1446 | if (adev->flags.coherent_dma) | |
1447 | return DEV_DMA_COHERENT; | |
1448 | else | |
1449 | return DEV_DMA_NON_COHERENT; | |
1450 | } | |
1451 | ||
c04ac679 LP |
1452 | /** |
1453 | * acpi_dma_get_range() - Get device DMA parameters. | |
1454 | * | |
1455 | * @dev: device to configure | |
1456 | * @dma_addr: pointer device DMA address result | |
1457 | * @offset: pointer to the DMA offset result | |
1458 | * @size: pointer to DMA range size result | |
1459 | * | |
1460 | * Evaluate DMA regions and return respectively DMA region start, offset | |
1461 | * and size in dma_addr, offset and size on parsing success; it does not | |
1462 | * update the passed in values on failure. | |
1463 | * | |
1464 | * Return 0 on success, < 0 on failure. | |
1465 | */ | |
1466 | int acpi_dma_get_range(struct device *dev, u64 *dma_addr, u64 *offset, | |
1467 | u64 *size) | |
1468 | { | |
1469 | struct acpi_device *adev; | |
1470 | LIST_HEAD(list); | |
1471 | struct resource_entry *rentry; | |
1472 | int ret; | |
1473 | struct device *dma_dev = dev; | |
1474 | u64 len, dma_start = U64_MAX, dma_end = 0, dma_offset = 0; | |
1475 | ||
1476 | /* | |
1477 | * Walk the device tree chasing an ACPI companion with a _DMA | |
1478 | * object while we go. Stop if we find a device with an ACPI | |
1479 | * companion containing a _DMA method. | |
1480 | */ | |
1481 | do { | |
1482 | adev = ACPI_COMPANION(dma_dev); | |
1483 | if (adev && acpi_has_method(adev->handle, METHOD_NAME__DMA)) | |
1484 | break; | |
1485 | ||
1486 | dma_dev = dma_dev->parent; | |
1487 | } while (dma_dev); | |
1488 | ||
1489 | if (!dma_dev) | |
1490 | return -ENODEV; | |
1491 | ||
1492 | if (!acpi_has_method(adev->handle, METHOD_NAME__CRS)) { | |
1493 | acpi_handle_warn(adev->handle, "_DMA is valid only if _CRS is present\n"); | |
1494 | return -EINVAL; | |
1495 | } | |
1496 | ||
1497 | ret = acpi_dev_get_dma_resources(adev, &list); | |
1498 | if (ret > 0) { | |
1499 | list_for_each_entry(rentry, &list, node) { | |
1500 | if (dma_offset && rentry->offset != dma_offset) { | |
1501 | ret = -EINVAL; | |
1502 | dev_warn(dma_dev, "Can't handle multiple windows with different offsets\n"); | |
1503 | goto out; | |
1504 | } | |
1505 | dma_offset = rentry->offset; | |
1506 | ||
1507 | /* Take lower and upper limits */ | |
1508 | if (rentry->res->start < dma_start) | |
1509 | dma_start = rentry->res->start; | |
1510 | if (rentry->res->end > dma_end) | |
1511 | dma_end = rentry->res->end; | |
1512 | } | |
1513 | ||
1514 | if (dma_start >= dma_end) { | |
1515 | ret = -EINVAL; | |
1516 | dev_dbg(dma_dev, "Invalid DMA regions configuration\n"); | |
1517 | goto out; | |
1518 | } | |
1519 | ||
1520 | *dma_addr = dma_start - dma_offset; | |
1521 | len = dma_end - dma_start; | |
1522 | *size = max(len, len + 1); | |
1523 | *offset = dma_offset; | |
1524 | } | |
1525 | out: | |
1526 | acpi_dev_free_resource_list(&list); | |
1527 | ||
1528 | return ret >= 0 ? 0 : ret; | |
1529 | } | |
1530 | ||
11a8c5e3 JPB |
1531 | #ifdef CONFIG_IOMMU_API |
1532 | int acpi_iommu_fwspec_init(struct device *dev, u32 id, | |
1533 | struct fwnode_handle *fwnode, | |
1534 | const struct iommu_ops *ops) | |
1535 | { | |
1536 | int ret = iommu_fwspec_init(dev, fwnode, ops); | |
1537 | ||
1538 | if (!ret) | |
1539 | ret = iommu_fwspec_add_ids(dev, &id, 1); | |
1540 | ||
1541 | return ret; | |
1542 | } | |
1543 | ||
1544 | static inline const struct iommu_ops *acpi_iommu_fwspec_ops(struct device *dev) | |
1545 | { | |
1546 | struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); | |
1547 | ||
1548 | return fwspec ? fwspec->ops : NULL; | |
1549 | } | |
1550 | ||
1551 | static const struct iommu_ops *acpi_iommu_configure_id(struct device *dev, | |
1552 | const u32 *id_in) | |
1553 | { | |
1554 | int err; | |
1555 | const struct iommu_ops *ops; | |
1556 | ||
1557 | /* | |
1558 | * If we already translated the fwspec there is nothing left to do, | |
1559 | * return the iommu_ops. | |
1560 | */ | |
1561 | ops = acpi_iommu_fwspec_ops(dev); | |
1562 | if (ops) | |
1563 | return ops; | |
1564 | ||
1565 | err = iort_iommu_configure_id(dev, id_in); | |
3cf48554 JPB |
1566 | if (err && err != -EPROBE_DEFER) |
1567 | err = viot_iommu_configure(dev); | |
11a8c5e3 JPB |
1568 | |
1569 | /* | |
1570 | * If we have reason to believe the IOMMU driver missed the initial | |
1571 | * iommu_probe_device() call for dev, replay it to get things in order. | |
1572 | */ | |
1573 | if (!err && dev->bus && !device_iommu_mapped(dev)) | |
1574 | err = iommu_probe_device(dev); | |
1575 | ||
1576 | /* Ignore all other errors apart from EPROBE_DEFER */ | |
1577 | if (err == -EPROBE_DEFER) { | |
1578 | return ERR_PTR(err); | |
1579 | } else if (err) { | |
1580 | dev_dbg(dev, "Adding to IOMMU failed: %d\n", err); | |
1581 | return NULL; | |
1582 | } | |
1583 | return acpi_iommu_fwspec_ops(dev); | |
1584 | } | |
1585 | ||
1586 | #else /* !CONFIG_IOMMU_API */ | |
1587 | ||
1588 | int acpi_iommu_fwspec_init(struct device *dev, u32 id, | |
1589 | struct fwnode_handle *fwnode, | |
1590 | const struct iommu_ops *ops) | |
1591 | { | |
1592 | return -ENODEV; | |
1593 | } | |
1594 | ||
1595 | static const struct iommu_ops *acpi_iommu_configure_id(struct device *dev, | |
1596 | const u32 *id_in) | |
1597 | { | |
1598 | return NULL; | |
1599 | } | |
1600 | ||
1601 | #endif /* !CONFIG_IOMMU_API */ | |
1602 | ||
d760a1ba | 1603 | /** |
c1e97359 | 1604 | * acpi_dma_configure_id - Set-up DMA configuration for the device. |
d760a1ba LP |
1605 | * @dev: The pointer to the device |
1606 | * @attr: device dma attributes | |
b8e069a2 | 1607 | * @input_id: input device id const value pointer |
d760a1ba | 1608 | */ |
b8e069a2 LP |
1609 | int acpi_dma_configure_id(struct device *dev, enum dev_dma_attr attr, |
1610 | const u32 *input_id) | |
d760a1ba | 1611 | { |
643b8e4d | 1612 | const struct iommu_ops *iommu; |
7ad42639 | 1613 | u64 dma_addr = 0, size = 0; |
643b8e4d | 1614 | |
e5361ca2 RM |
1615 | if (attr == DEV_DMA_NOT_SUPPORTED) { |
1616 | set_dma_ops(dev, &dma_dummy_ops); | |
1617 | return 0; | |
1618 | } | |
1619 | ||
db59e1b6 | 1620 | acpi_arch_dma_setup(dev, &dma_addr, &size); |
d760a1ba | 1621 | |
11a8c5e3 | 1622 | iommu = acpi_iommu_configure_id(dev, input_id); |
45586c70 | 1623 | if (PTR_ERR(iommu) == -EPROBE_DEFER) |
058f8c3f | 1624 | return -EPROBE_DEFER; |
643b8e4d | 1625 | |
7ad42639 LP |
1626 | arch_setup_dma_ops(dev, dma_addr, size, |
1627 | iommu, attr == DEV_DMA_COHERENT); | |
5a1bb638 S |
1628 | |
1629 | return 0; | |
d760a1ba | 1630 | } |
b8e069a2 | 1631 | EXPORT_SYMBOL_GPL(acpi_dma_configure_id); |
d760a1ba | 1632 | |
d0562674 SS |
1633 | static void acpi_init_coherency(struct acpi_device *adev) |
1634 | { | |
1635 | unsigned long long cca = 0; | |
1636 | acpi_status status; | |
1637 | struct acpi_device *parent = adev->parent; | |
1638 | ||
1639 | if (parent && parent->flags.cca_seen) { | |
1640 | /* | |
1641 | * From ACPI spec, OSPM will ignore _CCA if an ancestor | |
1642 | * already saw one. | |
1643 | */ | |
1644 | adev->flags.cca_seen = 1; | |
1645 | cca = parent->flags.coherent_dma; | |
1646 | } else { | |
1647 | status = acpi_evaluate_integer(adev->handle, "_CCA", | |
1648 | NULL, &cca); | |
1649 | if (ACPI_SUCCESS(status)) | |
1650 | adev->flags.cca_seen = 1; | |
1651 | else if (!IS_ENABLED(CONFIG_ACPI_CCA_REQUIRED)) | |
1652 | /* | |
1653 | * If architecture does not specify that _CCA is | |
1654 | * required for DMA-able devices (e.g. x86), | |
1655 | * we default to _CCA=1. | |
1656 | */ | |
1657 | cca = 1; | |
1658 | else | |
1659 | acpi_handle_debug(adev->handle, | |
1660 | "ACPI device is missing _CCA.\n"); | |
1661 | } | |
1662 | ||
1663 | adev->flags.coherent_dma = cca; | |
1664 | } | |
1665 | ||
e361d1f8 | 1666 | static int acpi_check_serial_bus_slave(struct acpi_resource *ares, void *data) |
e4330d8b | 1667 | { |
e361d1f8 | 1668 | bool *is_serial_bus_slave_p = data; |
e4330d8b JN |
1669 | |
1670 | if (ares->type != ACPI_RESOURCE_TYPE_SERIAL_BUS) | |
1671 | return 1; | |
1672 | ||
e361d1f8 | 1673 | *is_serial_bus_slave_p = true; |
e4330d8b JN |
1674 | |
1675 | /* no need to do more checking */ | |
1676 | return -1; | |
1677 | } | |
1678 | ||
dfda4492 JG |
1679 | static bool acpi_is_indirect_io_slave(struct acpi_device *device) |
1680 | { | |
1681 | struct acpi_device *parent = device->parent; | |
a6f07295 | 1682 | static const struct acpi_device_id indirect_io_hosts[] = { |
dfda4492 JG |
1683 | {"HISI0191", 0}, |
1684 | {} | |
1685 | }; | |
1686 | ||
1687 | return parent && !acpi_match_device_ids(parent, indirect_io_hosts); | |
1688 | } | |
1689 | ||
d87fb091 | 1690 | static bool acpi_device_enumeration_by_parent(struct acpi_device *device) |
e4330d8b JN |
1691 | { |
1692 | struct list_head resource_list; | |
e361d1f8 | 1693 | bool is_serial_bus_slave = false; |
aba94139 HG |
1694 | /* |
1695 | * These devices have multiple I2cSerialBus resources and an i2c-client | |
1696 | * must be instantiated for each, each with its own i2c_device_id. | |
1697 | * Normally we only instantiate an i2c-client for the first resource, | |
1698 | * using the ACPI HID as id. These special cases are handled by the | |
1699 | * drivers/platform/x86/i2c-multi-instantiate.c driver, which knows | |
1700 | * which i2c_device_id to use for each resource. | |
1701 | */ | |
1702 | static const struct acpi_device_id i2c_multi_instantiate_ids[] = { | |
1703 | {"BSG1160", }, | |
96f984d3 | 1704 | {"BSG2150", }, |
589edb56 | 1705 | {"INT33FE", }, |
a3dd034a | 1706 | {"INT3515", }, |
aba94139 HG |
1707 | {} |
1708 | }; | |
e4330d8b | 1709 | |
dfda4492 JG |
1710 | if (acpi_is_indirect_io_slave(device)) |
1711 | return true; | |
1712 | ||
ca9ef3ab LW |
1713 | /* Macs use device properties in lieu of _CRS resources */ |
1714 | if (x86_apple_machine && | |
1715 | (fwnode_property_present(&device->fwnode, "spiSclkPeriod") || | |
e361d1f8 FD |
1716 | fwnode_property_present(&device->fwnode, "i2cAddress") || |
1717 | fwnode_property_present(&device->fwnode, "baud"))) | |
ca9ef3ab LW |
1718 | return true; |
1719 | ||
aba94139 HG |
1720 | /* Instantiate a pdev for the i2c-multi-instantiate drv to bind to */ |
1721 | if (!acpi_match_device_ids(device, i2c_multi_instantiate_ids)) | |
1722 | return false; | |
1723 | ||
e4330d8b | 1724 | INIT_LIST_HEAD(&resource_list); |
e361d1f8 FD |
1725 | acpi_dev_get_resources(device, &resource_list, |
1726 | acpi_check_serial_bus_slave, | |
1727 | &is_serial_bus_slave); | |
e4330d8b JN |
1728 | acpi_dev_free_resource_list(&resource_list); |
1729 | ||
e361d1f8 | 1730 | return is_serial_bus_slave; |
e4330d8b JN |
1731 | } |
1732 | ||
82c7d5ef | 1733 | void acpi_init_device_object(struct acpi_device *device, acpi_handle handle, |
c830dbcf | 1734 | int type) |
1da177e4 | 1735 | { |
d43e167d RW |
1736 | INIT_LIST_HEAD(&device->pnp.ids); |
1737 | device->device_type = type; | |
1738 | device->handle = handle; | |
1739 | device->parent = acpi_bus_get_parent(handle); | |
01bb86b3 | 1740 | fwnode_init(&device->fwnode, &acpi_device_fwnode_ops); |
f5d9ab1d | 1741 | acpi_set_device_status(device, ACPI_STA_DEFAULT); |
d43e167d | 1742 | acpi_device_get_busid(device); |
c830dbcf | 1743 | acpi_set_pnp_ids(handle, &device->pnp, type); |
ffdcd955 | 1744 | acpi_init_properties(device); |
d43e167d | 1745 | acpi_bus_get_flags(device); |
2c0d4fe0 | 1746 | device->flags.match_driver = false; |
202317a5 | 1747 | device->flags.initialized = true; |
d87fb091 JG |
1748 | device->flags.enumeration_by_parent = |
1749 | acpi_device_enumeration_by_parent(device); | |
10c7e20b | 1750 | acpi_device_clear_enumerated(device); |
cf860be6 RW |
1751 | device_initialize(&device->dev); |
1752 | dev_set_uevent_suppress(&device->dev, true); | |
d0562674 | 1753 | acpi_init_coherency(device); |
6d279758 RW |
1754 | } |
1755 | ||
1756 | static void acpi_scan_dep_init(struct acpi_device *adev) | |
1757 | { | |
1758 | struct acpi_dep_data *dep; | |
1759 | ||
6d279758 RW |
1760 | list_for_each_entry(dep, &acpi_dep_list, node) { |
1761 | if (dep->consumer == adev->handle) | |
1762 | adev->dep_unmet++; | |
1763 | } | |
cf860be6 | 1764 | } |
bc3b0772 | 1765 | |
cf860be6 RW |
1766 | void acpi_device_add_finalize(struct acpi_device *device) |
1767 | { | |
1768 | dev_set_uevent_suppress(&device->dev, false); | |
1769 | kobject_uevent(&device->dev.kobj, KOBJ_ADD); | |
1da177e4 LT |
1770 | } |
1771 | ||
f5d9ab1d RW |
1772 | static void acpi_scan_init_status(struct acpi_device *adev) |
1773 | { | |
1774 | if (acpi_bus_get_status(adev)) | |
1775 | acpi_set_device_status(adev, 0); | |
1776 | } | |
1777 | ||
5c478f49 | 1778 | static int acpi_add_single_object(struct acpi_device **child, |
6d279758 | 1779 | acpi_handle handle, int type, bool dep_init) |
1da177e4 | 1780 | { |
e52d9d8c | 1781 | struct acpi_device *device; |
5f4ce260 | 1782 | bool release_dep_lock = false; |
e52d9d8c | 1783 | int result; |
6091b263 | 1784 | |
36bcbec7 | 1785 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
c830dbcf | 1786 | if (!device) |
d550d98d | 1787 | return -ENOMEM; |
1da177e4 | 1788 | |
c830dbcf | 1789 | acpi_init_device_object(device, handle, type); |
63347db0 | 1790 | /* |
f5d9ab1d RW |
1791 | * Getting the status is delayed till here so that we can call |
1792 | * acpi_bus_get_status() and use its quirk handling. Note that | |
1793 | * this must be done before the get power-/wakeup_dev-flags calls. | |
63347db0 | 1794 | */ |
6d279758 | 1795 | if (type == ACPI_BUS_TYPE_DEVICE || type == ACPI_BUS_TYPE_PROCESSOR) { |
5f4ce260 RW |
1796 | if (dep_init) { |
1797 | mutex_lock(&acpi_dep_list_lock); | |
1798 | /* | |
1799 | * Hold the lock until the acpi_tie_acpi_dev() call | |
1800 | * below to prevent concurrent acpi_scan_clear_dep() | |
1801 | * from deleting a dependency list entry without | |
1802 | * updating dep_unmet for the device. | |
1803 | */ | |
1804 | release_dep_lock = true; | |
6d279758 | 1805 | acpi_scan_dep_init(device); |
5f4ce260 | 1806 | } |
f5d9ab1d | 1807 | acpi_scan_init_status(device); |
6d279758 | 1808 | } |
63347db0 | 1809 | |
d43e167d | 1810 | acpi_bus_get_power_flags(device); |
d57d09a4 | 1811 | acpi_bus_get_wakeup_device_flags(device); |
1da177e4 | 1812 | |
5f4ce260 RW |
1813 | result = acpi_tie_acpi_dev(device); |
1814 | ||
1815 | if (release_dep_lock) | |
1816 | mutex_unlock(&acpi_dep_list_lock); | |
1817 | ||
1818 | if (!result) | |
1819 | result = __acpi_device_add(device, acpi_device_release); | |
1820 | ||
d43e167d | 1821 | if (result) { |
718fb0de | 1822 | acpi_device_release(&device->dev); |
d43e167d RW |
1823 | return result; |
1824 | } | |
1da177e4 | 1825 | |
d43e167d | 1826 | acpi_power_add_remove_device(device, true); |
cf860be6 | 1827 | acpi_device_add_finalize(device); |
e52d9d8c RW |
1828 | |
1829 | acpi_handle_debug(handle, "Added as %s, parent %s\n", | |
1830 | dev_name(&device->dev), device->parent ? | |
1831 | dev_name(&device->parent->dev) : "(null)"); | |
1832 | ||
d43e167d RW |
1833 | *child = device; |
1834 | return 0; | |
bf325f95 RW |
1835 | } |
1836 | ||
a4e081b0 SZ |
1837 | static acpi_status acpi_get_resource_memory(struct acpi_resource *ares, |
1838 | void *context) | |
1839 | { | |
1840 | struct resource *res = context; | |
1841 | ||
1842 | if (acpi_dev_resource_memory(ares, res)) | |
1843 | return AE_CTRL_TERMINATE; | |
1844 | ||
1845 | return AE_OK; | |
1846 | } | |
1847 | ||
1848 | static bool acpi_device_should_be_hidden(acpi_handle handle) | |
1849 | { | |
1850 | acpi_status status; | |
1851 | struct resource res; | |
1852 | ||
1853 | /* Check if it should ignore the UART device */ | |
1854 | if (!(spcr_uart_addr && acpi_has_method(handle, METHOD_NAME__CRS))) | |
1855 | return false; | |
1856 | ||
1857 | /* | |
1858 | * The UART device described in SPCR table is assumed to have only one | |
1859 | * memory resource present. So we only look for the first one here. | |
1860 | */ | |
1861 | status = acpi_walk_resources(handle, METHOD_NAME__CRS, | |
1862 | acpi_get_resource_memory, &res); | |
1863 | if (ACPI_FAILURE(status) || res.start != spcr_uart_addr) | |
1864 | return false; | |
1865 | ||
1866 | acpi_handle_info(handle, "The UART device @%pa in SPCR table will be hidden\n", | |
1867 | &res.start); | |
1868 | ||
1869 | return true; | |
1870 | } | |
1871 | ||
cde1f95f | 1872 | bool acpi_device_is_present(const struct acpi_device *adev) |
202317a5 | 1873 | { |
cde1f95f | 1874 | return adev->status.present || adev->status.functional; |
202317a5 RW |
1875 | } |
1876 | ||
4b59cc1f | 1877 | static bool acpi_scan_handler_matching(struct acpi_scan_handler *handler, |
844142c3 | 1878 | const char *idstr, |
4b59cc1f RW |
1879 | const struct acpi_device_id **matchid) |
1880 | { | |
1881 | const struct acpi_device_id *devid; | |
1882 | ||
aca0a4eb RW |
1883 | if (handler->match) |
1884 | return handler->match(idstr, matchid); | |
1885 | ||
4b59cc1f RW |
1886 | for (devid = handler->ids; devid->id[0]; devid++) |
1887 | if (!strcmp((char *)devid->id, idstr)) { | |
1888 | if (matchid) | |
1889 | *matchid = devid; | |
1890 | ||
1891 | return true; | |
1892 | } | |
1893 | ||
1894 | return false; | |
1895 | } | |
1896 | ||
844142c3 | 1897 | static struct acpi_scan_handler *acpi_scan_match_handler(const char *idstr, |
6b772e8f TK |
1898 | const struct acpi_device_id **matchid) |
1899 | { | |
1900 | struct acpi_scan_handler *handler; | |
1901 | ||
1902 | list_for_each_entry(handler, &acpi_scan_handlers_list, list_node) | |
1903 | if (acpi_scan_handler_matching(handler, idstr, matchid)) | |
1904 | return handler; | |
1905 | ||
1906 | return NULL; | |
1907 | } | |
1908 | ||
3f8055c3 RW |
1909 | void acpi_scan_hotplug_enabled(struct acpi_hotplug_profile *hotplug, bool val) |
1910 | { | |
3f8055c3 RW |
1911 | if (!!hotplug->enabled == !!val) |
1912 | return; | |
1913 | ||
1914 | mutex_lock(&acpi_scan_lock); | |
1915 | ||
1916 | hotplug->enabled = val; | |
3f8055c3 RW |
1917 | |
1918 | mutex_unlock(&acpi_scan_lock); | |
1919 | } | |
1920 | ||
3c2cc7ff | 1921 | static void acpi_scan_init_hotplug(struct acpi_device *adev) |
a33ec399 | 1922 | { |
6b772e8f | 1923 | struct acpi_hardware_id *hwid; |
a33ec399 | 1924 | |
b43109fa | 1925 | if (acpi_dock_match(adev->handle) || is_ejectable_bay(adev)) { |
1e2380cd RW |
1926 | acpi_dock_add(adev); |
1927 | return; | |
1928 | } | |
3c2cc7ff RW |
1929 | list_for_each_entry(hwid, &adev->pnp.ids, list) { |
1930 | struct acpi_scan_handler *handler; | |
a33ec399 | 1931 | |
6b772e8f | 1932 | handler = acpi_scan_match_handler(hwid->id, NULL); |
1a699476 RW |
1933 | if (handler) { |
1934 | adev->flags.hotplug_notify = true; | |
1935 | break; | |
1936 | } | |
3c2cc7ff | 1937 | } |
a33ec399 RW |
1938 | } |
1939 | ||
02056a4f | 1940 | static u32 acpi_scan_check_dep(acpi_handle handle, bool check_dep) |
40e7fcb1 | 1941 | { |
40e7fcb1 LT |
1942 | struct acpi_handle_list dep_devices; |
1943 | acpi_status status; | |
6fc25088 | 1944 | u32 count; |
40e7fcb1 LT |
1945 | int i; |
1946 | ||
71da201f RW |
1947 | /* |
1948 | * Check for _HID here to avoid deferring the enumeration of: | |
1949 | * 1. PCI devices. | |
1950 | * 2. ACPI nodes describing USB ports. | |
1951 | * Still, checking for _HID catches more then just these cases ... | |
1952 | */ | |
02056a4f RW |
1953 | if (!check_dep || !acpi_has_method(handle, "_DEP") || |
1954 | !acpi_has_method(handle, "_HID")) | |
6fc25088 | 1955 | return 0; |
40e7fcb1 | 1956 | |
6fc25088 | 1957 | status = acpi_evaluate_reference(handle, "_DEP", NULL, &dep_devices); |
40e7fcb1 | 1958 | if (ACPI_FAILURE(status)) { |
6fc25088 RW |
1959 | acpi_handle_debug(handle, "Failed to evaluate _DEP.\n"); |
1960 | return 0; | |
40e7fcb1 LT |
1961 | } |
1962 | ||
6fc25088 | 1963 | for (count = 0, i = 0; i < dep_devices.count; i++) { |
40e7fcb1 | 1964 | struct acpi_device_info *info; |
6fc25088 RW |
1965 | struct acpi_dep_data *dep; |
1966 | bool skip; | |
40e7fcb1 LT |
1967 | |
1968 | status = acpi_get_object_info(dep_devices.handles[i], &info); | |
1969 | if (ACPI_FAILURE(status)) { | |
6fc25088 | 1970 | acpi_handle_debug(handle, "Error reading _DEP device info\n"); |
40e7fcb1 LT |
1971 | continue; |
1972 | } | |
1973 | ||
2ef33ee7 | 1974 | skip = acpi_info_matches_ids(info, acpi_ignore_dep_ids); |
40e7fcb1 LT |
1975 | kfree(info); |
1976 | ||
1977 | if (skip) | |
1978 | continue; | |
1979 | ||
6fc25088 | 1980 | dep = kzalloc(sizeof(*dep), GFP_KERNEL); |
40e7fcb1 | 1981 | if (!dep) |
6fc25088 RW |
1982 | continue; |
1983 | ||
1984 | count++; | |
40e7fcb1 | 1985 | |
91438aeb | 1986 | dep->supplier = dep_devices.handles[i]; |
6fc25088 | 1987 | dep->consumer = handle; |
40e7fcb1 LT |
1988 | |
1989 | mutex_lock(&acpi_dep_list_lock); | |
1990 | list_add_tail(&dep->node , &acpi_dep_list); | |
1991 | mutex_unlock(&acpi_dep_list_lock); | |
1992 | } | |
6fc25088 RW |
1993 | |
1994 | return count; | |
40e7fcb1 LT |
1995 | } |
1996 | ||
0de7fb7c RW |
1997 | static bool acpi_bus_scan_second_pass; |
1998 | ||
71da201f RW |
1999 | static acpi_status acpi_bus_check_add(acpi_handle handle, bool check_dep, |
2000 | struct acpi_device **adev_p) | |
778cbc1d | 2001 | { |
805d410f | 2002 | struct acpi_device *device = NULL; |
e6c1067d | 2003 | acpi_object_type acpi_type; |
6fc25088 | 2004 | int type; |
778cbc1d | 2005 | |
4002bf38 RW |
2006 | acpi_bus_get_device(handle, &device); |
2007 | if (device) | |
2008 | goto out; | |
2009 | ||
e6c1067d | 2010 | if (ACPI_FAILURE(acpi_get_type(handle, &acpi_type))) |
778cbc1d BH |
2011 | return AE_OK; |
2012 | ||
e6c1067d RW |
2013 | switch (acpi_type) { |
2014 | case ACPI_TYPE_DEVICE: | |
2015 | if (acpi_device_should_be_hidden(handle)) | |
2016 | return AE_OK; | |
82c7d5ef | 2017 | |
02056a4f RW |
2018 | /* Bail out if there are dependencies. */ |
2019 | if (acpi_scan_check_dep(handle, check_dep) > 0) { | |
0de7fb7c | 2020 | acpi_bus_scan_second_pass = true; |
71da201f | 2021 | return AE_CTRL_DEPTH; |
0de7fb7c | 2022 | } |
02056a4f | 2023 | |
e6c1067d RW |
2024 | fallthrough; |
2025 | case ACPI_TYPE_ANY: /* for ACPI_ROOT_OBJECT */ | |
2026 | type = ACPI_BUS_TYPE_DEVICE; | |
2027 | break; | |
2028 | ||
2029 | case ACPI_TYPE_PROCESSOR: | |
e6c1067d RW |
2030 | type = ACPI_BUS_TYPE_PROCESSOR; |
2031 | break; | |
2032 | ||
2033 | case ACPI_TYPE_THERMAL: | |
2034 | type = ACPI_BUS_TYPE_THERMAL; | |
2035 | break; | |
2036 | ||
2037 | case ACPI_TYPE_POWER: | |
82c7d5ef | 2038 | acpi_add_power_resource(handle); |
02056a4f RW |
2039 | fallthrough; |
2040 | default: | |
82c7d5ef | 2041 | return AE_OK; |
71da201f | 2042 | } |
6fc25088 | 2043 | |
3e759425 HG |
2044 | /* |
2045 | * If check_dep is true at this point, the device has no dependencies, | |
2046 | * or the creation of the device object would have been postponed above. | |
2047 | */ | |
6d279758 RW |
2048 | acpi_add_single_object(&device, handle, type, !check_dep); |
2049 | if (!device) | |
2050 | return AE_CTRL_DEPTH; | |
2051 | ||
2052 | acpi_scan_init_hotplug(device); | |
3c2cc7ff | 2053 | |
71da201f RW |
2054 | out: |
2055 | if (!*adev_p) | |
2056 | *adev_p = device; | |
805d410f | 2057 | |
51a85faf BH |
2058 | return AE_OK; |
2059 | } | |
3fb02738 | 2060 | |
71da201f RW |
2061 | static acpi_status acpi_bus_check_add_1(acpi_handle handle, u32 lvl_not_used, |
2062 | void *not_used, void **ret_p) | |
2063 | { | |
2064 | return acpi_bus_check_add(handle, true, (struct acpi_device **)ret_p); | |
2065 | } | |
2066 | ||
2067 | static acpi_status acpi_bus_check_add_2(acpi_handle handle, u32 lvl_not_used, | |
2068 | void *not_used, void **ret_p) | |
2069 | { | |
2070 | return acpi_bus_check_add(handle, false, (struct acpi_device **)ret_p); | |
2071 | } | |
2072 | ||
48459340 ZR |
2073 | static void acpi_default_enumeration(struct acpi_device *device) |
2074 | { | |
48459340 | 2075 | /* |
d87fb091 JG |
2076 | * Do not enumerate devices with enumeration_by_parent flag set as |
2077 | * they will be enumerated by their respective parents. | |
48459340 | 2078 | */ |
d87fb091 | 2079 | if (!device->flags.enumeration_by_parent) { |
1571875b | 2080 | acpi_create_platform_device(device, NULL); |
10c7e20b | 2081 | acpi_device_set_enumerated(device); |
68bdb677 OP |
2082 | } else { |
2083 | blocking_notifier_call_chain(&acpi_reconfig_chain, | |
2084 | ACPI_RECONFIG_DEVICE_ADD, device); | |
10c7e20b | 2085 | } |
48459340 ZR |
2086 | } |
2087 | ||
7d284352 | 2088 | static const struct acpi_device_id generic_device_ids[] = { |
ee892094 | 2089 | {ACPI_DT_NAMESPACE_HID, }, |
7d284352 RW |
2090 | {"", }, |
2091 | }; | |
2092 | ||
2093 | static int acpi_generic_device_attach(struct acpi_device *adev, | |
2094 | const struct acpi_device_id *not_used) | |
2095 | { | |
2096 | /* | |
ee892094 RW |
2097 | * Since ACPI_DT_NAMESPACE_HID is the only ID handled here, the test |
2098 | * below can be unconditional. | |
7d284352 RW |
2099 | */ |
2100 | if (adev->data.of_compatible) | |
2101 | acpi_default_enumeration(adev); | |
2102 | ||
2103 | return 1; | |
2104 | } | |
2105 | ||
2106 | static struct acpi_scan_handler generic_device_handler = { | |
2107 | .ids = generic_device_ids, | |
2108 | .attach = acpi_generic_device_attach, | |
2109 | }; | |
2110 | ||
c5698074 | 2111 | static int acpi_scan_attach_handler(struct acpi_device *device) |
ca589f94 | 2112 | { |
c5698074 RW |
2113 | struct acpi_hardware_id *hwid; |
2114 | int ret = 0; | |
ca589f94 | 2115 | |
c5698074 | 2116 | list_for_each_entry(hwid, &device->pnp.ids, list) { |
87b85b3c | 2117 | const struct acpi_device_id *devid; |
c5698074 | 2118 | struct acpi_scan_handler *handler; |
ca589f94 | 2119 | |
c5698074 RW |
2120 | handler = acpi_scan_match_handler(hwid->id, &devid); |
2121 | if (handler) { | |
d34afa9d RW |
2122 | if (!handler->attach) { |
2123 | device->pnp.type.platform_id = 0; | |
2124 | continue; | |
2125 | } | |
9cb32acf | 2126 | device->handler = handler; |
87b85b3c | 2127 | ret = handler->attach(device, devid); |
9cb32acf | 2128 | if (ret > 0) |
c5698074 | 2129 | break; |
9cb32acf RW |
2130 | |
2131 | device->handler = NULL; | |
2132 | if (ret < 0) | |
c5698074 | 2133 | break; |
ca589f94 RW |
2134 | } |
2135 | } | |
48459340 | 2136 | |
ca589f94 RW |
2137 | return ret; |
2138 | } | |
2139 | ||
71da201f | 2140 | static void acpi_bus_attach(struct acpi_device *device, bool first_pass) |
51a85faf | 2141 | { |
2c22e652 | 2142 | struct acpi_device *child; |
71da201f | 2143 | bool skip = !first_pass && device->flags.visited; |
1e2380cd | 2144 | acpi_handle ejd; |
ca589f94 | 2145 | int ret; |
3fb02738 | 2146 | |
71da201f RW |
2147 | if (skip) |
2148 | goto ok; | |
2149 | ||
1e2380cd RW |
2150 | if (ACPI_SUCCESS(acpi_bus_get_ejd(device->handle, &ejd))) |
2151 | register_dock_dependent_device(device, ejd); | |
2152 | ||
2c22e652 | 2153 | acpi_bus_get_status(device); |
202317a5 | 2154 | /* Skip devices that are not present. */ |
2c22e652 | 2155 | if (!acpi_device_is_present(device)) { |
cde1f95f | 2156 | device->flags.initialized = false; |
10c7e20b | 2157 | acpi_device_clear_enumerated(device); |
1b1f3e16 | 2158 | device->flags.power_manageable = 0; |
2c22e652 RW |
2159 | return; |
2160 | } | |
3a391a39 | 2161 | if (device->handler) |
2c22e652 | 2162 | goto ok; |
3a391a39 | 2163 | |
202317a5 | 2164 | if (!device->flags.initialized) { |
1b1f3e16 RW |
2165 | device->flags.power_manageable = |
2166 | device->power.states[ACPI_STATE_D0].flags.valid; | |
2167 | if (acpi_bus_init_power(device)) | |
2168 | device->flags.power_manageable = 0; | |
2169 | ||
202317a5 | 2170 | device->flags.initialized = true; |
c381fc3a RW |
2171 | } else if (device->flags.visited) { |
2172 | goto ok; | |
202317a5 | 2173 | } |
10c7e20b | 2174 | |
ca589f94 | 2175 | ret = acpi_scan_attach_handler(device); |
6931007c | 2176 | if (ret < 0) |
2c22e652 | 2177 | return; |
6931007c RW |
2178 | |
2179 | device->flags.match_driver = true; | |
d87fb091 | 2180 | if (ret > 0 && !device->flags.enumeration_by_parent) { |
f406270b RW |
2181 | acpi_device_set_enumerated(device); |
2182 | goto ok; | |
2c22e652 | 2183 | } |
202317a5 | 2184 | |
f406270b RW |
2185 | ret = device_attach(&device->dev); |
2186 | if (ret < 0) | |
2187 | return; | |
2188 | ||
d87fb091 | 2189 | if (device->pnp.type.platform_id || device->flags.enumeration_by_parent) |
e4330d8b | 2190 | acpi_default_enumeration(device); |
d87fb091 JG |
2191 | else |
2192 | acpi_device_set_enumerated(device); | |
f406270b | 2193 | |
2c22e652 RW |
2194 | ok: |
2195 | list_for_each_entry(child, &device->children, node) | |
71da201f | 2196 | acpi_bus_attach(child, first_pass); |
8ab17fc9 | 2197 | |
71da201f | 2198 | if (!skip && device->handler && device->handler->hotplug.notify_online) |
8ab17fc9 | 2199 | device->handler->hotplug.notify_online(device); |
1da177e4 | 2200 | } |
1da177e4 | 2201 | |
b83e2b30 | 2202 | static int acpi_dev_get_first_consumer_dev_cb(struct acpi_dep_data *dep, void *data) |
40e7fcb1 | 2203 | { |
40e7fcb1 LT |
2204 | struct acpi_device *adev; |
2205 | ||
b83e2b30 | 2206 | adev = acpi_bus_get_acpi_device(dep->consumer); |
ad4d451e RW |
2207 | if (adev) { |
2208 | *(struct acpi_device **)data = adev; | |
2209 | return 1; | |
2210 | } | |
2211 | /* Continue parsing if the device object is not present. */ | |
2212 | return 0; | |
b83e2b30 DS |
2213 | } |
2214 | ||
dc612486 RW |
2215 | struct acpi_scan_clear_dep_work { |
2216 | struct work_struct work; | |
40e7fcb1 | 2217 | struct acpi_device *adev; |
dc612486 RW |
2218 | }; |
2219 | ||
2220 | static void acpi_scan_clear_dep_fn(struct work_struct *work) | |
2221 | { | |
2222 | struct acpi_scan_clear_dep_work *cdw; | |
2223 | ||
2224 | cdw = container_of(work, struct acpi_scan_clear_dep_work, work); | |
40e7fcb1 | 2225 | |
dc612486 RW |
2226 | acpi_scan_lock_acquire(); |
2227 | acpi_bus_attach(cdw->adev, true); | |
2228 | acpi_scan_lock_release(); | |
2229 | ||
2230 | acpi_dev_put(cdw->adev); | |
2231 | kfree(cdw); | |
2232 | } | |
2233 | ||
2234 | static bool acpi_scan_clear_dep_queue(struct acpi_device *adev) | |
2235 | { | |
2236 | struct acpi_scan_clear_dep_work *cdw; | |
2237 | ||
2238 | if (adev->dep_unmet) | |
2239 | return false; | |
2240 | ||
2241 | cdw = kmalloc(sizeof(*cdw), GFP_KERNEL); | |
2242 | if (!cdw) | |
2243 | return false; | |
2244 | ||
2245 | cdw->adev = adev; | |
2246 | INIT_WORK(&cdw->work, acpi_scan_clear_dep_fn); | |
2247 | /* | |
2248 | * Since the work function may block on the lock until the entire | |
2249 | * initial enumeration of devices is complete, put it into the unbound | |
2250 | * workqueue. | |
2251 | */ | |
2252 | queue_work(system_unbound_wq, &cdw->work); | |
2253 | ||
2254 | return true; | |
2255 | } | |
2256 | ||
2257 | static int acpi_scan_clear_dep(struct acpi_dep_data *dep, void *data) | |
2258 | { | |
2259 | struct acpi_device *adev = acpi_bus_get_acpi_device(dep->consumer); | |
a9e10e58 DS |
2260 | |
2261 | if (adev) { | |
2262 | adev->dep_unmet--; | |
dc612486 RW |
2263 | if (!acpi_scan_clear_dep_queue(adev)) |
2264 | acpi_dev_put(adev); | |
a9e10e58 DS |
2265 | } |
2266 | ||
2267 | list_del(&dep->node); | |
2268 | kfree(dep); | |
2269 | ||
2270 | return 0; | |
2271 | } | |
2272 | ||
2273 | /** | |
2274 | * acpi_walk_dep_device_list - Apply a callback to every entry in acpi_dep_list | |
2275 | * @handle: The ACPI handle of the supplier device | |
2276 | * @callback: Pointer to the callback function to apply | |
2277 | * @data: Pointer to some data to pass to the callback | |
2278 | * | |
2279 | * The return value of the callback determines this function's behaviour. If 0 | |
2280 | * is returned we continue to iterate over acpi_dep_list. If a positive value | |
2281 | * is returned then the loop is broken but this function returns 0. If a | |
2282 | * negative value is returned by the callback then the loop is broken and that | |
2283 | * value is returned as the final error. | |
2284 | */ | |
aff0dbd0 RW |
2285 | static int acpi_walk_dep_device_list(acpi_handle handle, |
2286 | int (*callback)(struct acpi_dep_data *, void *), | |
2287 | void *data) | |
a9e10e58 DS |
2288 | { |
2289 | struct acpi_dep_data *dep, *tmp; | |
23db673d | 2290 | int ret = 0; |
a9e10e58 | 2291 | |
40e7fcb1 LT |
2292 | mutex_lock(&acpi_dep_list_lock); |
2293 | list_for_each_entry_safe(dep, tmp, &acpi_dep_list, node) { | |
91438aeb | 2294 | if (dep->supplier == handle) { |
a9e10e58 DS |
2295 | ret = callback(dep, data); |
2296 | if (ret) | |
2297 | break; | |
40e7fcb1 LT |
2298 | } |
2299 | } | |
2300 | mutex_unlock(&acpi_dep_list_lock); | |
a9e10e58 DS |
2301 | |
2302 | return ret > 0 ? 0 : ret; | |
40e7fcb1 | 2303 | } |
40e7fcb1 | 2304 | |
a9e10e58 DS |
2305 | /** |
2306 | * acpi_dev_clear_dependencies - Inform consumers that the device is now active | |
2307 | * @supplier: Pointer to the supplier &struct acpi_device | |
2308 | * | |
2309 | * Clear dependencies on the given device. | |
2310 | */ | |
2311 | void acpi_dev_clear_dependencies(struct acpi_device *supplier) | |
2312 | { | |
2313 | acpi_walk_dep_device_list(supplier->handle, acpi_scan_clear_dep, NULL); | |
2314 | } | |
2315 | EXPORT_SYMBOL_GPL(acpi_dev_clear_dependencies); | |
2316 | ||
b83e2b30 DS |
2317 | /** |
2318 | * acpi_dev_get_first_consumer_dev - Return ACPI device dependent on @supplier | |
2319 | * @supplier: Pointer to the dependee device | |
2320 | * | |
2321 | * Returns the first &struct acpi_device which declares itself dependent on | |
2322 | * @supplier via the _DEP buffer, parsed from the acpi_dep_list. | |
2323 | * | |
2324 | * The caller is responsible for putting the reference to adev when it is no | |
2325 | * longer needed. | |
2326 | */ | |
2327 | struct acpi_device *acpi_dev_get_first_consumer_dev(struct acpi_device *supplier) | |
2328 | { | |
2329 | struct acpi_device *adev = NULL; | |
2330 | ||
2331 | acpi_walk_dep_device_list(supplier->handle, | |
2332 | acpi_dev_get_first_consumer_dev_cb, &adev); | |
2333 | ||
2334 | return adev; | |
40e7fcb1 | 2335 | } |
b83e2b30 | 2336 | EXPORT_SYMBOL_GPL(acpi_dev_get_first_consumer_dev); |
40e7fcb1 | 2337 | |
636458de | 2338 | /** |
b8bd759a | 2339 | * acpi_bus_scan - Add ACPI device node objects in a given namespace scope. |
636458de | 2340 | * @handle: Root of the namespace scope to scan. |
7779688f | 2341 | * |
636458de RW |
2342 | * Scan a given ACPI tree (probably recently hot-plugged) and create and add |
2343 | * found devices. | |
7779688f | 2344 | * |
636458de RW |
2345 | * If no devices were found, -ENODEV is returned, but it does not mean that |
2346 | * there has been a real error. There just have been no suitable ACPI objects | |
2347 | * in the table trunk from which the kernel could create a device and add an | |
2348 | * appropriate driver. | |
3757b948 RW |
2349 | * |
2350 | * Must be called under acpi_scan_lock. | |
7779688f | 2351 | */ |
b8bd759a | 2352 | int acpi_bus_scan(acpi_handle handle) |
3fb02738 | 2353 | { |
71da201f RW |
2354 | struct acpi_device *device = NULL; |
2355 | ||
0de7fb7c | 2356 | acpi_bus_scan_second_pass = false; |
3fb02738 | 2357 | |
71da201f | 2358 | /* Pass 1: Avoid enumerating devices with missing dependencies. */ |
3fb02738 | 2359 | |
71da201f | 2360 | if (ACPI_SUCCESS(acpi_bus_check_add(handle, true, &device))) |
b8bd759a | 2361 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
71da201f RW |
2362 | acpi_bus_check_add_1, NULL, NULL, |
2363 | (void **)&device); | |
3fb02738 | 2364 | |
71da201f RW |
2365 | if (!device) |
2366 | return -ENODEV; | |
3fb02738 | 2367 | |
71da201f RW |
2368 | acpi_bus_attach(device, true); |
2369 | ||
0de7fb7c | 2370 | if (!acpi_bus_scan_second_pass) |
2c22e652 | 2371 | return 0; |
0de7fb7c | 2372 | |
71da201f RW |
2373 | /* Pass 2: Enumerate all of the remaining devices. */ |
2374 | ||
2375 | device = NULL; | |
2376 | ||
2377 | if (ACPI_SUCCESS(acpi_bus_check_add(handle, false, &device))) | |
2378 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, | |
2379 | acpi_bus_check_add_2, NULL, NULL, | |
2380 | (void **)&device); | |
2381 | ||
2382 | acpi_bus_attach(device, false); | |
2383 | ||
2384 | return 0; | |
3fb02738 | 2385 | } |
2c22e652 | 2386 | EXPORT_SYMBOL(acpi_bus_scan); |
1da177e4 | 2387 | |
3757b948 | 2388 | /** |
2c22e652 RW |
2389 | * acpi_bus_trim - Detach scan handlers and drivers from ACPI device objects. |
2390 | * @adev: Root of the ACPI namespace scope to walk. | |
3757b948 RW |
2391 | * |
2392 | * Must be called under acpi_scan_lock. | |
2393 | */ | |
2c22e652 | 2394 | void acpi_bus_trim(struct acpi_device *adev) |
1da177e4 | 2395 | { |
2c22e652 RW |
2396 | struct acpi_scan_handler *handler = adev->handler; |
2397 | struct acpi_device *child; | |
2398 | ||
2399 | list_for_each_entry_reverse(child, &adev->children, node) | |
2400 | acpi_bus_trim(child); | |
2401 | ||
a951c773 | 2402 | adev->flags.match_driver = false; |
2c22e652 RW |
2403 | if (handler) { |
2404 | if (handler->detach) | |
2405 | handler->detach(adev); | |
2406 | ||
2407 | adev->handler = NULL; | |
2408 | } else { | |
2409 | device_release_driver(&adev->dev); | |
2410 | } | |
05404d8f | 2411 | /* |
2c22e652 RW |
2412 | * Most likely, the device is going away, so put it into D3cold before |
2413 | * that. | |
05404d8f | 2414 | */ |
2c22e652 RW |
2415 | acpi_device_set_power(adev, ACPI_STATE_D3_COLD); |
2416 | adev->flags.initialized = false; | |
10c7e20b | 2417 | acpi_device_clear_enumerated(adev); |
1da177e4 | 2418 | } |
ceaba663 KA |
2419 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
2420 | ||
a64a62ce LZ |
2421 | int acpi_bus_register_early_device(int type) |
2422 | { | |
2423 | struct acpi_device *device = NULL; | |
2424 | int result; | |
2425 | ||
6d279758 | 2426 | result = acpi_add_single_object(&device, NULL, type, false); |
a64a62ce LZ |
2427 | if (result) |
2428 | return result; | |
2429 | ||
2430 | device->flags.match_driver = true; | |
2431 | return device_attach(&device->dev); | |
2432 | } | |
2433 | EXPORT_SYMBOL_GPL(acpi_bus_register_early_device); | |
2434 | ||
e8b945c9 | 2435 | static int acpi_bus_scan_fixed(void) |
1da177e4 | 2436 | { |
4be44fcd | 2437 | int result = 0; |
c4168bff | 2438 | |
1da177e4 LT |
2439 | /* |
2440 | * Enumerate all fixed-feature devices. | |
2441 | */ | |
2c0d4fe0 RW |
2442 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON)) { |
2443 | struct acpi_device *device = NULL; | |
2444 | ||
5c478f49 | 2445 | result = acpi_add_single_object(&device, NULL, |
6d279758 | 2446 | ACPI_BUS_TYPE_POWER_BUTTON, false); |
2c0d4fe0 RW |
2447 | if (result) |
2448 | return result; | |
2449 | ||
88346167 | 2450 | device->flags.match_driver = true; |
2c0d4fe0 RW |
2451 | result = device_attach(&device->dev); |
2452 | if (result < 0) | |
2453 | return result; | |
2454 | ||
c10d7a13 | 2455 | device_init_wakeup(&device->dev, true); |
3fb02738 | 2456 | } |
1da177e4 | 2457 | |
2c0d4fe0 RW |
2458 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON)) { |
2459 | struct acpi_device *device = NULL; | |
2460 | ||
5c478f49 | 2461 | result = acpi_add_single_object(&device, NULL, |
6d279758 | 2462 | ACPI_BUS_TYPE_SLEEP_BUTTON, false); |
2c0d4fe0 RW |
2463 | if (result) |
2464 | return result; | |
2465 | ||
88346167 | 2466 | device->flags.match_driver = true; |
2c0d4fe0 | 2467 | result = device_attach(&device->dev); |
3fb02738 | 2468 | } |
1da177e4 | 2469 | |
2c0d4fe0 | 2470 | return result < 0 ? result : 0; |
1da177e4 LT |
2471 | } |
2472 | ||
a4e081b0 SZ |
2473 | static void __init acpi_get_spcr_uart_addr(void) |
2474 | { | |
2475 | acpi_status status; | |
2476 | struct acpi_table_spcr *spcr_ptr; | |
2477 | ||
2478 | status = acpi_get_table(ACPI_SIG_SPCR, 0, | |
2479 | (struct acpi_table_header **)&spcr_ptr); | |
ead7ba13 | 2480 | if (ACPI_FAILURE(status)) { |
8acf4108 | 2481 | pr_warn("STAO table present, but SPCR is missing\n"); |
ead7ba13 HG |
2482 | return; |
2483 | } | |
2484 | ||
2485 | spcr_uart_addr = spcr_ptr->serial_port.address; | |
2486 | acpi_put_table((struct acpi_table_header *)spcr_ptr); | |
a4e081b0 SZ |
2487 | } |
2488 | ||
68bdb677 OP |
2489 | static bool acpi_scan_initialized; |
2490 | ||
e747f274 | 2491 | int __init acpi_scan_init(void) |
1da177e4 LT |
2492 | { |
2493 | int result; | |
a4e081b0 SZ |
2494 | acpi_status status; |
2495 | struct acpi_table_stao *stao_ptr; | |
1da177e4 | 2496 | |
92ef2a25 | 2497 | acpi_pci_root_init(); |
4daeaf68 | 2498 | acpi_pci_link_init(); |
ac212b69 | 2499 | acpi_processor_init(); |
cb0701ac | 2500 | acpi_platform_init(); |
f58b082a | 2501 | acpi_lpss_init(); |
92082a88 | 2502 | acpi_apd_init(); |
2fa97feb | 2503 | acpi_cmos_rtc_init(); |
737f1a9f | 2504 | acpi_container_init(); |
0a347644 | 2505 | acpi_memory_hotplug_init(); |
cc6a0e31 | 2506 | acpi_watchdog_init(); |
eec15edb | 2507 | acpi_pnp_init(); |
3230bbfc | 2508 | acpi_int340x_thermal_init(); |
6ce2e188 | 2509 | acpi_amba_init(); |
eeb2d80d | 2510 | acpi_init_lpit(); |
97d9a9e9 | 2511 | |
7d284352 RW |
2512 | acpi_scan_add_handler(&generic_device_handler); |
2513 | ||
a4e081b0 SZ |
2514 | /* |
2515 | * If there is STAO table, check whether it needs to ignore the UART | |
2516 | * device in SPCR table. | |
2517 | */ | |
2518 | status = acpi_get_table(ACPI_SIG_STAO, 0, | |
2519 | (struct acpi_table_header **)&stao_ptr); | |
2520 | if (ACPI_SUCCESS(status)) { | |
2521 | if (stao_ptr->header.length > sizeof(struct acpi_table_stao)) | |
8acf4108 | 2522 | pr_info("STAO Name List not yet supported.\n"); |
a4e081b0 SZ |
2523 | |
2524 | if (stao_ptr->ignore_uart) | |
2525 | acpi_get_spcr_uart_addr(); | |
ead7ba13 HG |
2526 | |
2527 | acpi_put_table((struct acpi_table_header *)stao_ptr); | |
a4e081b0 SZ |
2528 | } |
2529 | ||
eb7f43c4 RW |
2530 | acpi_gpe_apply_masked_gpes(); |
2531 | acpi_update_all_gpes(); | |
2532 | ||
7291edca DH |
2533 | /* |
2534 | * Although we call __add_memory() that is documented to require the | |
2535 | * device_hotplug_lock, it is not necessary here because this is an | |
2536 | * early code when userspace or any other code path cannot trigger | |
2537 | * hotplug/hotunplug operations. | |
2538 | */ | |
3757b948 | 2539 | mutex_lock(&acpi_scan_lock); |
1da177e4 LT |
2540 | /* |
2541 | * Enumerate devices in the ACPI namespace. | |
2542 | */ | |
0cd6ac52 RW |
2543 | result = acpi_bus_scan(ACPI_ROOT_OBJECT); |
2544 | if (result) | |
3757b948 | 2545 | goto out; |
1da177e4 | 2546 | |
0cd6ac52 | 2547 | result = acpi_bus_get_device(ACPI_ROOT_OBJECT, &acpi_root); |
1da177e4 | 2548 | if (result) |
3757b948 | 2549 | goto out; |
1da177e4 | 2550 | |
2650ef42 AL |
2551 | /* Fixed feature devices do not exist on HW-reduced platform */ |
2552 | if (!acpi_gbl_reduced_hardware) { | |
2553 | result = acpi_bus_scan_fixed(); | |
2554 | if (result) { | |
2555 | acpi_detach_data(acpi_root->handle, | |
2556 | acpi_scan_drop_device); | |
2557 | acpi_device_del(acpi_root); | |
4cbaba4e | 2558 | acpi_bus_put_acpi_device(acpi_root); |
2650ef42 AL |
2559 | goto out; |
2560 | } | |
b8bd759a | 2561 | } |
1da177e4 | 2562 | |
c10383e8 RW |
2563 | /* |
2564 | * Make sure that power management resources are not blocked by ACPI | |
2565 | * device objects with no users. | |
2566 | */ | |
2567 | bus_for_each_dev(&acpi_bus_type, NULL, NULL, acpi_dev_turn_off_if_unused); | |
2568 | ||
6381195a | 2569 | acpi_turn_off_unused_power_resources(); |
29038ae2 | 2570 | |
68bdb677 OP |
2571 | acpi_scan_initialized = true; |
2572 | ||
3757b948 RW |
2573 | out: |
2574 | mutex_unlock(&acpi_scan_lock); | |
2575 | return result; | |
1da177e4 | 2576 | } |
e647b532 MZ |
2577 | |
2578 | static struct acpi_probe_entry *ape; | |
2579 | static int acpi_probe_count; | |
5331d9ca | 2580 | static DEFINE_MUTEX(acpi_probe_mutex); |
e647b532 | 2581 | |
60574d1e | 2582 | static int __init acpi_match_madt(union acpi_subtable_headers *header, |
e647b532 MZ |
2583 | const unsigned long end) |
2584 | { | |
60574d1e | 2585 | if (!ape->subtable_valid || ape->subtable_valid(&header->common, ape)) |
e647b532 MZ |
2586 | if (!ape->probe_subtbl(header, end)) |
2587 | acpi_probe_count++; | |
2588 | ||
2589 | return 0; | |
2590 | } | |
2591 | ||
2592 | int __init __acpi_probe_device_table(struct acpi_probe_entry *ap_head, int nr) | |
2593 | { | |
2594 | int count = 0; | |
2595 | ||
2596 | if (acpi_disabled) | |
2597 | return 0; | |
2598 | ||
5331d9ca | 2599 | mutex_lock(&acpi_probe_mutex); |
e647b532 | 2600 | for (ape = ap_head; nr; ape++, nr--) { |
5599fb69 | 2601 | if (ACPI_COMPARE_NAMESEG(ACPI_SIG_MADT, ape->id)) { |
e647b532 MZ |
2602 | acpi_probe_count = 0; |
2603 | acpi_table_parse_madt(ape->type, acpi_match_madt, 0); | |
2604 | count += acpi_probe_count; | |
2605 | } else { | |
2606 | int res; | |
2607 | res = acpi_table_parse(ape->id, ape->probe_table); | |
2608 | if (!res) | |
2609 | count++; | |
2610 | } | |
2611 | } | |
5331d9ca | 2612 | mutex_unlock(&acpi_probe_mutex); |
e647b532 MZ |
2613 | |
2614 | return count; | |
2615 | } | |
68bdb677 | 2616 | |
68bdb677 OP |
2617 | static void acpi_table_events_fn(struct work_struct *work) |
2618 | { | |
8d287e82 RW |
2619 | acpi_scan_lock_acquire(); |
2620 | acpi_bus_scan(ACPI_ROOT_OBJECT); | |
2621 | acpi_scan_lock_release(); | |
68bdb677 | 2622 | |
8d287e82 | 2623 | kfree(work); |
68bdb677 OP |
2624 | } |
2625 | ||
8d287e82 | 2626 | void acpi_scan_table_notify(void) |
68bdb677 | 2627 | { |
8d287e82 | 2628 | struct work_struct *work; |
68bdb677 OP |
2629 | |
2630 | if (!acpi_scan_initialized) | |
2631 | return; | |
2632 | ||
8d287e82 RW |
2633 | work = kmalloc(sizeof(*work), GFP_KERNEL); |
2634 | if (!work) | |
68bdb677 OP |
2635 | return; |
2636 | ||
8d287e82 RW |
2637 | INIT_WORK(work, acpi_table_events_fn); |
2638 | schedule_work(work); | |
68bdb677 OP |
2639 | } |
2640 | ||
2641 | int acpi_reconfig_notifier_register(struct notifier_block *nb) | |
2642 | { | |
2643 | return blocking_notifier_chain_register(&acpi_reconfig_chain, nb); | |
2644 | } | |
2645 | EXPORT_SYMBOL(acpi_reconfig_notifier_register); | |
2646 | ||
2647 | int acpi_reconfig_notifier_unregister(struct notifier_block *nb) | |
2648 | { | |
2649 | return blocking_notifier_chain_unregister(&acpi_reconfig_chain, nb); | |
2650 | } | |
2651 | EXPORT_SYMBOL(acpi_reconfig_notifier_unregister); |