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95857638 | 1 | // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 |
3cfd53d5 LM |
2 | /****************************************************************************** |
3 | * | |
4 | * Module Name: evxfgpe - External Interfaces for General Purpose Events (GPEs) | |
5 | * | |
800ba7c5 | 6 | * Copyright (C) 2000 - 2020, Intel Corp. |
3cfd53d5 | 7 | * |
95857638 | 8 | *****************************************************************************/ |
3cfd53d5 | 9 | |
839e928f LZ |
10 | #define EXPORT_ACPI_INTERFACES |
11 | ||
3cfd53d5 LM |
12 | #include <acpi/acpi.h> |
13 | #include "accommon.h" | |
14 | #include "acevents.h" | |
15 | #include "acnamesp.h" | |
16 | ||
17 | #define _COMPONENT ACPI_EVENTS | |
18 | ACPI_MODULE_NAME("evxfgpe") | |
19 | ||
33620c54 | 20 | #if (!ACPI_REDUCED_HARDWARE) /* Entire module */ |
75c8044f | 21 | /******************************************************************************* |
3cfd53d5 | 22 | * |
3a37898d | 23 | * FUNCTION: acpi_update_all_gpes |
3cfd53d5 LM |
24 | * |
25 | * PARAMETERS: None | |
26 | * | |
da503373 LM |
27 | * RETURN: Status |
28 | * | |
29 | * DESCRIPTION: Complete GPE initialization and enable all GPEs that have | |
30 | * associated _Lxx or _Exx methods and are not pointed to by any | |
31 | * device _PRW methods (this indicates that these GPEs are | |
32 | * generally intended for system or device wakeup. Such GPEs | |
33 | * have to be enabled directly when the devices whose _PRW | |
34 | * methods point to them are set up for wakeup signaling.) | |
3cfd53d5 | 35 | * |
da503373 LM |
36 | * NOTE: Should be called after any GPEs are added to the system. Primarily, |
37 | * after the system _PRW methods have been run, but also after a GPE Block | |
38 | * Device has been added or if any new GPE methods have been added via a | |
39 | * dynamic table load. | |
3cfd53d5 LM |
40 | * |
41 | ******************************************************************************/ | |
42 | ||
3a37898d | 43 | acpi_status acpi_update_all_gpes(void) |
3cfd53d5 LM |
44 | { |
45 | acpi_status status; | |
87cd826b | 46 | u8 is_polling_needed = FALSE; |
3cfd53d5 | 47 | |
3a37898d | 48 | ACPI_FUNCTION_TRACE(acpi_update_all_gpes); |
3cfd53d5 LM |
49 | |
50 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); | |
51 | if (ACPI_FAILURE(status)) { | |
52 | return_ACPI_STATUS(status); | |
3a37898d LM |
53 | } |
54 | ||
55 | if (acpi_gbl_all_gpes_initialized) { | |
56 | goto unlock_and_exit; | |
3cfd53d5 LM |
57 | } |
58 | ||
87cd826b ES |
59 | status = acpi_ev_walk_gpe_list(acpi_ev_initialize_gpe_block, |
60 | &is_polling_needed); | |
3cfd53d5 | 61 | if (ACPI_SUCCESS(status)) { |
3a37898d | 62 | acpi_gbl_all_gpes_initialized = TRUE; |
3cfd53d5 LM |
63 | } |
64 | ||
3a37898d | 65 | unlock_and_exit: |
3cfd53d5 LM |
66 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); |
67 | ||
87cd826b ES |
68 | if (is_polling_needed && acpi_gbl_all_gpes_initialized) { |
69 | ||
70 | /* Poll GPEs to handle already triggered events */ | |
71 | ||
72 | acpi_ev_gpe_detect(acpi_gbl_gpe_xrupt_list_head); | |
73 | } | |
3cfd53d5 LM |
74 | return_ACPI_STATUS(status); |
75 | } | |
76 | ||
3a37898d LM |
77 | ACPI_EXPORT_SYMBOL(acpi_update_all_gpes) |
78 | ||
3cfd53d5 LM |
79 | /******************************************************************************* |
80 | * | |
81 | * FUNCTION: acpi_enable_gpe | |
82 | * | |
f19f1a7e LZ |
83 | * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 |
84 | * gpe_number - GPE level within the GPE block | |
3cfd53d5 LM |
85 | * |
86 | * RETURN: Status | |
87 | * | |
88 | * DESCRIPTION: Add a reference to a GPE. On the first reference, the GPE is | |
89 | * hardware-enabled. | |
90 | * | |
91 | ******************************************************************************/ | |
3cfd53d5 LM |
92 | acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number) |
93 | { | |
94 | acpi_status status = AE_BAD_PARAMETER; | |
95 | struct acpi_gpe_event_info *gpe_event_info; | |
96 | acpi_cpu_flags flags; | |
97 | ||
98 | ACPI_FUNCTION_TRACE(acpi_enable_gpe); | |
99 | ||
100 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
101 | ||
b9ca3d7b RW |
102 | /* |
103 | * Ensure that we have a valid GPE number and that there is some way | |
104 | * of handling the GPE (handler or a GPE method). In other words, we | |
105 | * won't allow a valid GPE to be enabled if there is no way to handle it. | |
106 | */ | |
3cfd53d5 LM |
107 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); |
108 | if (gpe_event_info) { | |
7c43312a | 109 | if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) != |
b9ca3d7b | 110 | ACPI_GPE_DISPATCH_NONE) { |
44758baf | 111 | status = acpi_ev_add_gpe_reference(gpe_event_info, TRUE); |
87cd826b ES |
112 | if (ACPI_SUCCESS(status) && |
113 | ACPI_GPE_IS_POLLING_NEEDED(gpe_event_info)) { | |
114 | ||
115 | /* Poll edge-triggered GPEs to handle existing events */ | |
116 | ||
117 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
118 | (void)acpi_ev_detect_gpe(gpe_device, | |
119 | gpe_event_info, | |
120 | gpe_number); | |
121 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
122 | } | |
b9ca3d7b RW |
123 | } else { |
124 | status = AE_NO_HANDLER; | |
125 | } | |
3cfd53d5 LM |
126 | } |
127 | ||
128 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
129 | return_ACPI_STATUS(status); | |
130 | } | |
131 | ACPI_EXPORT_SYMBOL(acpi_enable_gpe) | |
132 | ||
133 | /******************************************************************************* | |
134 | * | |
135 | * FUNCTION: acpi_disable_gpe | |
136 | * | |
137 | * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 | |
138 | * gpe_number - GPE level within the GPE block | |
139 | * | |
140 | * RETURN: Status | |
141 | * | |
142 | * DESCRIPTION: Remove a reference to a GPE. When the last reference is | |
143 | * removed, only then is the GPE disabled (for runtime GPEs), or | |
144 | * the GPE mask bit disabled (for wake GPEs) | |
145 | * | |
146 | ******************************************************************************/ | |
147 | ||
148 | acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number) | |
149 | { | |
150 | acpi_status status = AE_BAD_PARAMETER; | |
151 | struct acpi_gpe_event_info *gpe_event_info; | |
152 | acpi_cpu_flags flags; | |
153 | ||
154 | ACPI_FUNCTION_TRACE(acpi_disable_gpe); | |
155 | ||
156 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
157 | ||
158 | /* Ensure that we have a valid GPE number */ | |
159 | ||
160 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); | |
161 | if (gpe_event_info) { | |
3a37898d | 162 | status = acpi_ev_remove_gpe_reference(gpe_event_info) ; |
3cfd53d5 LM |
163 | } |
164 | ||
165 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
166 | return_ACPI_STATUS(status); | |
167 | } | |
3e8214e5 | 168 | |
3cfd53d5 LM |
169 | ACPI_EXPORT_SYMBOL(acpi_disable_gpe) |
170 | ||
eb3d80f7 LZ |
171 | /******************************************************************************* |
172 | * | |
173 | * FUNCTION: acpi_set_gpe | |
174 | * | |
175 | * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 | |
176 | * gpe_number - GPE level within the GPE block | |
177 | * action - ACPI_GPE_ENABLE or ACPI_GPE_DISABLE | |
178 | * | |
179 | * RETURN: Status | |
180 | * | |
181 | * DESCRIPTION: Enable or disable an individual GPE. This function bypasses | |
2eedd3d8 LZ |
182 | * the reference count mechanism used in the acpi_enable_gpe(), |
183 | * acpi_disable_gpe() interfaces. | |
184 | * This API is typically used by the GPE raw handler mode driver | |
185 | * to switch between the polling mode and the interrupt mode after | |
186 | * the driver has enabled the GPE. | |
187 | * The APIs should be invoked in this order: | |
188 | * acpi_enable_gpe() <- Ensure the reference count > 0 | |
189 | * acpi_set_gpe(ACPI_GPE_DISABLE) <- Enter polling mode | |
190 | * acpi_set_gpe(ACPI_GPE_ENABLE) <- Leave polling mode | |
191 | * acpi_disable_gpe() <- Decrease the reference count | |
192 | * | |
193 | * Note: If a GPE is shared by 2 silicon components, then both the drivers | |
194 | * should support GPE polling mode or disabling the GPE for long period | |
195 | * for one driver may break the other. So use it with care since all | |
196 | * firmware _Lxx/_Exx handlers currently rely on the GPE interrupt mode. | |
eb3d80f7 LZ |
197 | * |
198 | ******************************************************************************/ | |
199 | acpi_status acpi_set_gpe(acpi_handle gpe_device, u32 gpe_number, u8 action) | |
200 | { | |
201 | struct acpi_gpe_event_info *gpe_event_info; | |
202 | acpi_status status; | |
203 | acpi_cpu_flags flags; | |
204 | ||
205 | ACPI_FUNCTION_TRACE(acpi_set_gpe); | |
206 | ||
207 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
208 | ||
209 | /* Ensure that we have a valid GPE number */ | |
210 | ||
211 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); | |
212 | if (!gpe_event_info) { | |
213 | status = AE_BAD_PARAMETER; | |
214 | goto unlock_and_exit; | |
215 | } | |
216 | ||
217 | /* Perform the action */ | |
218 | ||
219 | switch (action) { | |
220 | case ACPI_GPE_ENABLE: | |
221 | ||
2eedd3d8 | 222 | status = acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_ENABLE); |
2af52c2b | 223 | gpe_event_info->disable_for_dispatch = FALSE; |
eb3d80f7 LZ |
224 | break; |
225 | ||
226 | case ACPI_GPE_DISABLE: | |
227 | ||
228 | status = acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_DISABLE); | |
2af52c2b | 229 | gpe_event_info->disable_for_dispatch = TRUE; |
eb3d80f7 LZ |
230 | break; |
231 | ||
232 | default: | |
233 | ||
234 | status = AE_BAD_PARAMETER; | |
235 | break; | |
236 | } | |
237 | ||
238 | unlock_and_exit: | |
239 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
240 | return_ACPI_STATUS(status); | |
241 | } | |
242 | ||
243 | ACPI_EXPORT_SYMBOL(acpi_set_gpe) | |
bba63a29 | 244 | |
2af52c2b LZ |
245 | /******************************************************************************* |
246 | * | |
247 | * FUNCTION: acpi_mask_gpe | |
248 | * | |
249 | * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 | |
250 | * gpe_number - GPE level within the GPE block | |
251 | * is_masked - Whether the GPE is masked or not | |
252 | * | |
253 | * RETURN: Status | |
254 | * | |
255 | * DESCRIPTION: Unconditionally mask/unmask the an individual GPE, ex., to | |
256 | * prevent a GPE flooding. | |
257 | * | |
258 | ******************************************************************************/ | |
259 | acpi_status acpi_mask_gpe(acpi_handle gpe_device, u32 gpe_number, u8 is_masked) | |
260 | { | |
261 | struct acpi_gpe_event_info *gpe_event_info; | |
262 | acpi_status status; | |
263 | acpi_cpu_flags flags; | |
264 | ||
265 | ACPI_FUNCTION_TRACE(acpi_mask_gpe); | |
266 | ||
267 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
268 | ||
269 | /* Ensure that we have a valid GPE number */ | |
270 | ||
271 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); | |
272 | if (!gpe_event_info) { | |
273 | status = AE_BAD_PARAMETER; | |
274 | goto unlock_and_exit; | |
275 | } | |
276 | ||
277 | status = acpi_ev_mask_gpe(gpe_event_info, is_masked); | |
278 | ||
279 | unlock_and_exit: | |
280 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
281 | return_ACPI_STATUS(status); | |
282 | } | |
283 | ||
284 | ACPI_EXPORT_SYMBOL(acpi_mask_gpe) | |
285 | ||
c12f07d1 RW |
286 | /******************************************************************************* |
287 | * | |
288 | * FUNCTION: acpi_mark_gpe_for_wake | |
289 | * | |
290 | * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 | |
291 | * gpe_number - GPE level within the GPE block | |
292 | * | |
293 | * RETURN: Status | |
294 | * | |
295 | * DESCRIPTION: Mark a GPE as having the ability to wake the system. Simply | |
296 | * sets the ACPI_GPE_CAN_WAKE flag. | |
297 | * | |
298 | * Some potential callers of acpi_setup_gpe_for_wake may know in advance that | |
299 | * there won't be any notify handlers installed for device wake notifications | |
300 | * from the given GPE (one example is a button GPE in Linux). For these cases, | |
301 | * acpi_mark_gpe_for_wake should be used instead of acpi_setup_gpe_for_wake. | |
302 | * This will set the ACPI_GPE_CAN_WAKE flag for the GPE without trying to | |
303 | * setup implicit wake notification for it (since there's no handler method). | |
304 | * | |
305 | ******************************************************************************/ | |
306 | acpi_status acpi_mark_gpe_for_wake(acpi_handle gpe_device, u32 gpe_number) | |
307 | { | |
308 | struct acpi_gpe_event_info *gpe_event_info; | |
309 | acpi_status status = AE_BAD_PARAMETER; | |
310 | acpi_cpu_flags flags; | |
311 | ||
312 | ACPI_FUNCTION_TRACE(acpi_mark_gpe_for_wake); | |
313 | ||
314 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
315 | ||
316 | /* Ensure that we have a valid GPE number */ | |
317 | ||
318 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); | |
319 | if (gpe_event_info) { | |
320 | ||
321 | /* Mark the GPE as a possible wake event */ | |
322 | ||
323 | gpe_event_info->flags |= ACPI_GPE_CAN_WAKE; | |
324 | status = AE_OK; | |
325 | } | |
326 | ||
327 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
328 | return_ACPI_STATUS(status); | |
329 | } | |
330 | ||
331 | ACPI_EXPORT_SYMBOL(acpi_mark_gpe_for_wake) | |
332 | ||
3cfd53d5 LM |
333 | /******************************************************************************* |
334 | * | |
3a37898d | 335 | * FUNCTION: acpi_setup_gpe_for_wake |
3cfd53d5 | 336 | * |
bba63a29 LM |
337 | * PARAMETERS: wake_device - Device associated with the GPE (via _PRW) |
338 | * gpe_device - Parent GPE Device. NULL for GPE0/GPE1 | |
339 | * gpe_number - GPE level within the GPE block | |
3cfd53d5 LM |
340 | * |
341 | * RETURN: Status | |
342 | * | |
bba63a29 LM |
343 | * DESCRIPTION: Mark a GPE as having the ability to wake the system. This |
344 | * interface is intended to be used as the host executes the | |
345 | * _PRW methods (Power Resources for Wake) in the system tables. | |
346 | * Each _PRW appears under a Device Object (The wake_device), and | |
347 | * contains the info for the wake GPE associated with the | |
348 | * wake_device. | |
3cfd53d5 LM |
349 | * |
350 | ******************************************************************************/ | |
bba63a29 LM |
351 | acpi_status |
352 | acpi_setup_gpe_for_wake(acpi_handle wake_device, | |
353 | acpi_handle gpe_device, u32 gpe_number) | |
3cfd53d5 | 354 | { |
5816b343 | 355 | acpi_status status; |
3cfd53d5 | 356 | struct acpi_gpe_event_info *gpe_event_info; |
bba63a29 | 357 | struct acpi_namespace_node *device_node; |
5816b343 BM |
358 | struct acpi_gpe_notify_info *notify; |
359 | struct acpi_gpe_notify_info *new_notify; | |
3cfd53d5 LM |
360 | acpi_cpu_flags flags; |
361 | ||
3a37898d | 362 | ACPI_FUNCTION_TRACE(acpi_setup_gpe_for_wake); |
3cfd53d5 | 363 | |
bba63a29 LM |
364 | /* Parameter Validation */ |
365 | ||
366 | if (!wake_device) { | |
367 | /* | |
368 | * By forcing wake_device to be valid, we automatically enable the | |
369 | * implicit notify feature on all hosts. | |
370 | */ | |
371 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
372 | } | |
373 | ||
5816b343 BM |
374 | /* Handle root object case */ |
375 | ||
376 | if (wake_device == ACPI_ROOT_OBJECT) { | |
377 | device_node = acpi_gbl_root_node; | |
378 | } else { | |
1f86e8c1 LZ |
379 | device_node = |
380 | ACPI_CAST_PTR(struct acpi_namespace_node, wake_device); | |
5816b343 BM |
381 | } |
382 | ||
75c8044f | 383 | /* Validate wake_device is of type Device */ |
5816b343 BM |
384 | |
385 | if (device_node->type != ACPI_TYPE_DEVICE) { | |
386 | return_ACPI_STATUS (AE_BAD_PARAMETER); | |
387 | } | |
388 | ||
389 | /* | |
390 | * Allocate a new notify object up front, in case it is needed. | |
391 | * Memory allocation while holding a spinlock is a big no-no | |
392 | * on some hosts. | |
393 | */ | |
394 | new_notify = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_notify_info)); | |
395 | if (!new_notify) { | |
396 | return_ACPI_STATUS(AE_NO_MEMORY); | |
397 | } | |
398 | ||
3cfd53d5 LM |
399 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
400 | ||
401 | /* Ensure that we have a valid GPE number */ | |
402 | ||
403 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); | |
2d559513 | 404 | if (!gpe_event_info) { |
5816b343 | 405 | status = AE_BAD_PARAMETER; |
2d559513 RW |
406 | goto unlock_and_exit; |
407 | } | |
bba63a29 | 408 | |
2d559513 RW |
409 | /* |
410 | * If there is no method or handler for this GPE, then the | |
5816b343 BM |
411 | * wake_device will be notified whenever this GPE fires. This is |
412 | * known as an "implicit notify". Note: The GPE is assumed to be | |
2d559513 RW |
413 | * level-triggered (for windows compatibility). |
414 | */ | |
7c43312a | 415 | if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) == |
5816b343 BM |
416 | ACPI_GPE_DISPATCH_NONE) { |
417 | /* | |
418 | * This is the first device for implicit notify on this GPE. | |
419 | * Just set the flags here, and enter the NOTIFY block below. | |
420 | */ | |
421 | gpe_event_info->flags = | |
422 | (ACPI_GPE_DISPATCH_NOTIFY | ACPI_GPE_LEVEL_TRIGGERED); | |
1312b7e0 RW |
423 | } else if (gpe_event_info->flags & ACPI_GPE_AUTO_ENABLED) { |
424 | /* | |
425 | * A reference to this GPE has been added during the GPE block | |
426 | * initialization, so drop it now to prevent the GPE from being | |
427 | * permanently enabled and clear its ACPI_GPE_AUTO_ENABLED flag. | |
428 | */ | |
429 | (void)acpi_ev_remove_gpe_reference(gpe_event_info); | |
430 | gpe_event_info->flags &= ~ACPI_GPE_AUTO_ENABLED; | |
981858bd RW |
431 | } |
432 | ||
5816b343 BM |
433 | /* |
434 | * If we already have an implicit notify on this GPE, add | |
435 | * this device to the notify list. | |
436 | */ | |
7c43312a | 437 | if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) == |
5816b343 BM |
438 | ACPI_GPE_DISPATCH_NOTIFY) { |
439 | ||
440 | /* Ensure that the device is not already in the list */ | |
441 | ||
442 | notify = gpe_event_info->dispatch.notify_list; | |
443 | while (notify) { | |
444 | if (notify->device_node == device_node) { | |
445 | status = AE_ALREADY_EXISTS; | |
446 | goto unlock_and_exit; | |
447 | } | |
448 | notify = notify->next; | |
981858bd RW |
449 | } |
450 | ||
5816b343 BM |
451 | /* Add this device to the notify list for this GPE */ |
452 | ||
453 | new_notify->device_node = device_node; | |
454 | new_notify->next = gpe_event_info->dispatch.notify_list; | |
455 | gpe_event_info->dispatch.notify_list = new_notify; | |
456 | new_notify = NULL; | |
3cfd53d5 LM |
457 | } |
458 | ||
5816b343 BM |
459 | /* Mark the GPE as a possible wake event */ |
460 | ||
2d559513 RW |
461 | gpe_event_info->flags |= ACPI_GPE_CAN_WAKE; |
462 | status = AE_OK; | |
463 | ||
5816b343 | 464 | unlock_and_exit: |
3cfd53d5 | 465 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
5816b343 BM |
466 | |
467 | /* Delete the notify object if it was not used above */ | |
468 | ||
469 | if (new_notify) { | |
470 | ACPI_FREE(new_notify); | |
471 | } | |
3cfd53d5 LM |
472 | return_ACPI_STATUS(status); |
473 | } | |
3a37898d | 474 | ACPI_EXPORT_SYMBOL(acpi_setup_gpe_for_wake) |
3cfd53d5 LM |
475 | |
476 | /******************************************************************************* | |
477 | * | |
3a37898d | 478 | * FUNCTION: acpi_set_gpe_wake_mask |
3cfd53d5 LM |
479 | * |
480 | * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 | |
481 | * gpe_number - GPE level within the GPE block | |
ba494bee | 482 | * action - Enable or Disable |
3cfd53d5 LM |
483 | * |
484 | * RETURN: Status | |
485 | * | |
da503373 LM |
486 | * DESCRIPTION: Set or clear the GPE's wakeup enable mask bit. The GPE must |
487 | * already be marked as a WAKE GPE. | |
3cfd53d5 LM |
488 | * |
489 | ******************************************************************************/ | |
490 | ||
1f86e8c1 LZ |
491 | acpi_status |
492 | acpi_set_gpe_wake_mask(acpi_handle gpe_device, u32 gpe_number, u8 action) | |
3cfd53d5 LM |
493 | { |
494 | acpi_status status = AE_OK; | |
495 | struct acpi_gpe_event_info *gpe_event_info; | |
496 | struct acpi_gpe_register_info *gpe_register_info; | |
497 | acpi_cpu_flags flags; | |
498 | u32 register_bit; | |
499 | ||
3a37898d | 500 | ACPI_FUNCTION_TRACE(acpi_set_gpe_wake_mask); |
3cfd53d5 LM |
501 | |
502 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
503 | ||
da503373 LM |
504 | /* |
505 | * Ensure that we have a valid GPE number and that this GPE is in | |
506 | * fact a wake GPE | |
507 | */ | |
3cfd53d5 | 508 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); |
3a37898d | 509 | if (!gpe_event_info) { |
3cfd53d5 LM |
510 | status = AE_BAD_PARAMETER; |
511 | goto unlock_and_exit; | |
512 | } | |
513 | ||
3a37898d LM |
514 | if (!(gpe_event_info->flags & ACPI_GPE_CAN_WAKE)) { |
515 | status = AE_TYPE; | |
516 | goto unlock_and_exit; | |
517 | } | |
518 | ||
3cfd53d5 LM |
519 | gpe_register_info = gpe_event_info->register_info; |
520 | if (!gpe_register_info) { | |
521 | status = AE_NOT_EXIST; | |
522 | goto unlock_and_exit; | |
523 | } | |
524 | ||
1d94e1e8 | 525 | register_bit = acpi_hw_get_gpe_register_bit(gpe_event_info); |
3cfd53d5 LM |
526 | |
527 | /* Perform the action */ | |
528 | ||
529 | switch (action) { | |
530 | case ACPI_GPE_ENABLE: | |
1d1ea1b7 | 531 | |
3cfd53d5 LM |
532 | ACPI_SET_BIT(gpe_register_info->enable_for_wake, |
533 | (u8)register_bit); | |
534 | break; | |
535 | ||
536 | case ACPI_GPE_DISABLE: | |
1d1ea1b7 | 537 | |
3cfd53d5 LM |
538 | ACPI_CLEAR_BIT(gpe_register_info->enable_for_wake, |
539 | (u8)register_bit); | |
540 | break; | |
541 | ||
542 | default: | |
1d1ea1b7 | 543 | |
3cfd53d5 LM |
544 | ACPI_ERROR((AE_INFO, "%u, Invalid action", action)); |
545 | status = AE_BAD_PARAMETER; | |
546 | break; | |
547 | } | |
548 | ||
549 | unlock_and_exit: | |
550 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
551 | return_ACPI_STATUS(status); | |
552 | } | |
553 | ||
3a37898d | 554 | ACPI_EXPORT_SYMBOL(acpi_set_gpe_wake_mask) |
3cfd53d5 LM |
555 | |
556 | /******************************************************************************* | |
557 | * | |
558 | * FUNCTION: acpi_clear_gpe | |
559 | * | |
560 | * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 | |
561 | * gpe_number - GPE level within the GPE block | |
562 | * | |
563 | * RETURN: Status | |
564 | * | |
565 | * DESCRIPTION: Clear an ACPI event (general purpose) | |
566 | * | |
567 | ******************************************************************************/ | |
568 | acpi_status acpi_clear_gpe(acpi_handle gpe_device, u32 gpe_number) | |
569 | { | |
570 | acpi_status status = AE_OK; | |
571 | struct acpi_gpe_event_info *gpe_event_info; | |
572 | acpi_cpu_flags flags; | |
573 | ||
574 | ACPI_FUNCTION_TRACE(acpi_clear_gpe); | |
575 | ||
576 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
577 | ||
578 | /* Ensure that we have a valid GPE number */ | |
579 | ||
580 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); | |
581 | if (!gpe_event_info) { | |
582 | status = AE_BAD_PARAMETER; | |
583 | goto unlock_and_exit; | |
584 | } | |
585 | ||
586 | status = acpi_hw_clear_gpe(gpe_event_info); | |
587 | ||
588 | unlock_and_exit: | |
589 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
590 | return_ACPI_STATUS(status); | |
591 | } | |
592 | ||
593 | ACPI_EXPORT_SYMBOL(acpi_clear_gpe) | |
594 | ||
595 | /******************************************************************************* | |
596 | * | |
597 | * FUNCTION: acpi_get_gpe_status | |
598 | * | |
f19f1a7e LZ |
599 | * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 |
600 | * gpe_number - GPE level within the GPE block | |
75c8044f LZ |
601 | * event_status - Where the current status of the event |
602 | * will be returned | |
3cfd53d5 LM |
603 | * |
604 | * RETURN: Status | |
605 | * | |
da503373 | 606 | * DESCRIPTION: Get the current status of a GPE (signalled/not_signalled) |
3cfd53d5 LM |
607 | * |
608 | ******************************************************************************/ | |
609 | acpi_status | |
610 | acpi_get_gpe_status(acpi_handle gpe_device, | |
611 | u32 gpe_number, acpi_event_status *event_status) | |
612 | { | |
613 | acpi_status status = AE_OK; | |
614 | struct acpi_gpe_event_info *gpe_event_info; | |
615 | acpi_cpu_flags flags; | |
616 | ||
617 | ACPI_FUNCTION_TRACE(acpi_get_gpe_status); | |
618 | ||
619 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
620 | ||
621 | /* Ensure that we have a valid GPE number */ | |
622 | ||
623 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); | |
624 | if (!gpe_event_info) { | |
625 | status = AE_BAD_PARAMETER; | |
626 | goto unlock_and_exit; | |
627 | } | |
628 | ||
629 | /* Obtain status on the requested GPE number */ | |
630 | ||
631 | status = acpi_hw_get_gpe_status(gpe_event_info, event_status); | |
632 | ||
10622bf8 | 633 | unlock_and_exit: |
3cfd53d5 LM |
634 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
635 | return_ACPI_STATUS(status); | |
636 | } | |
637 | ||
638 | ACPI_EXPORT_SYMBOL(acpi_get_gpe_status) | |
639 | ||
74536453 RW |
640 | /******************************************************************************* |
641 | * | |
642 | * FUNCTION: acpi_gispatch_gpe | |
643 | * | |
644 | * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 | |
645 | * gpe_number - GPE level within the GPE block | |
646 | * | |
6921de89 | 647 | * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED |
74536453 RW |
648 | * |
649 | * DESCRIPTION: Detect and dispatch a General Purpose Event to either a function | |
650 | * (e.g. EC) or method (e.g. _Lxx/_Exx) handler. | |
651 | * | |
652 | ******************************************************************************/ | |
6921de89 | 653 | u32 acpi_dispatch_gpe(acpi_handle gpe_device, u32 gpe_number) |
74536453 RW |
654 | { |
655 | ACPI_FUNCTION_TRACE(acpi_dispatch_gpe); | |
656 | ||
6921de89 | 657 | return acpi_ev_detect_gpe(gpe_device, NULL, gpe_number); |
74536453 RW |
658 | } |
659 | ||
660 | ACPI_EXPORT_SYMBOL(acpi_dispatch_gpe) | |
661 | ||
eb3d80f7 LZ |
662 | /******************************************************************************* |
663 | * | |
664 | * FUNCTION: acpi_finish_gpe | |
665 | * | |
666 | * PARAMETERS: gpe_device - Namespace node for the GPE Block | |
667 | * (NULL for FADT defined GPEs) | |
668 | * gpe_number - GPE level within the GPE block | |
669 | * | |
670 | * RETURN: Status | |
671 | * | |
c163f90c | 672 | * DESCRIPTION: Clear and conditionally re-enable a GPE. This completes the GPE |
eb3d80f7 | 673 | * processing. Intended for use by asynchronous host-installed |
c163f90c | 674 | * GPE handlers. The GPE is only re-enabled if the enable_for_run bit |
eb3d80f7 LZ |
675 | * is set in the GPE info. |
676 | * | |
677 | ******************************************************************************/ | |
678 | acpi_status acpi_finish_gpe(acpi_handle gpe_device, u32 gpe_number) | |
679 | { | |
680 | struct acpi_gpe_event_info *gpe_event_info; | |
681 | acpi_status status; | |
682 | acpi_cpu_flags flags; | |
683 | ||
684 | ACPI_FUNCTION_TRACE(acpi_finish_gpe); | |
685 | ||
686 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
687 | ||
688 | /* Ensure that we have a valid GPE number */ | |
689 | ||
690 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); | |
691 | if (!gpe_event_info) { | |
692 | status = AE_BAD_PARAMETER; | |
693 | goto unlock_and_exit; | |
694 | } | |
695 | ||
696 | status = acpi_ev_finish_gpe(gpe_event_info); | |
697 | ||
698 | unlock_and_exit: | |
699 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
700 | return_ACPI_STATUS(status); | |
701 | } | |
702 | ||
703 | ACPI_EXPORT_SYMBOL(acpi_finish_gpe) | |
704 | ||
3cfd53d5 LM |
705 | /****************************************************************************** |
706 | * | |
707 | * FUNCTION: acpi_disable_all_gpes | |
708 | * | |
709 | * PARAMETERS: None | |
710 | * | |
711 | * RETURN: Status | |
712 | * | |
713 | * DESCRIPTION: Disable and clear all GPEs in all GPE blocks | |
714 | * | |
715 | ******************************************************************************/ | |
716 | ||
717 | acpi_status acpi_disable_all_gpes(void) | |
718 | { | |
719 | acpi_status status; | |
720 | ||
721 | ACPI_FUNCTION_TRACE(acpi_disable_all_gpes); | |
722 | ||
723 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); | |
724 | if (ACPI_FAILURE(status)) { | |
725 | return_ACPI_STATUS(status); | |
726 | } | |
727 | ||
728 | status = acpi_hw_disable_all_gpes(); | |
729 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
730 | ||
731 | return_ACPI_STATUS(status); | |
732 | } | |
733 | ||
3a37898d LM |
734 | ACPI_EXPORT_SYMBOL(acpi_disable_all_gpes) |
735 | ||
3cfd53d5 LM |
736 | /****************************************************************************** |
737 | * | |
738 | * FUNCTION: acpi_enable_all_runtime_gpes | |
739 | * | |
740 | * PARAMETERS: None | |
741 | * | |
742 | * RETURN: Status | |
743 | * | |
744 | * DESCRIPTION: Enable all "runtime" GPEs, in all GPE blocks | |
745 | * | |
746 | ******************************************************************************/ | |
747 | ||
748 | acpi_status acpi_enable_all_runtime_gpes(void) | |
749 | { | |
750 | acpi_status status; | |
751 | ||
752 | ACPI_FUNCTION_TRACE(acpi_enable_all_runtime_gpes); | |
753 | ||
754 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); | |
755 | if (ACPI_FAILURE(status)) { | |
756 | return_ACPI_STATUS(status); | |
757 | } | |
758 | ||
759 | status = acpi_hw_enable_all_runtime_gpes(); | |
760 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
761 | ||
762 | return_ACPI_STATUS(status); | |
763 | } | |
764 | ||
3a37898d LM |
765 | ACPI_EXPORT_SYMBOL(acpi_enable_all_runtime_gpes) |
766 | ||
e0fa975d RW |
767 | /****************************************************************************** |
768 | * | |
769 | * FUNCTION: acpi_enable_all_wakeup_gpes | |
770 | * | |
771 | * PARAMETERS: None | |
772 | * | |
773 | * RETURN: Status | |
774 | * | |
775 | * DESCRIPTION: Enable all "wakeup" GPEs and disable all of the other GPEs, in | |
776 | * all GPE blocks. | |
777 | * | |
778 | ******************************************************************************/ | |
e0fa975d RW |
779 | acpi_status acpi_enable_all_wakeup_gpes(void) |
780 | { | |
781 | acpi_status status; | |
782 | ||
783 | ACPI_FUNCTION_TRACE(acpi_enable_all_wakeup_gpes); | |
784 | ||
785 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); | |
786 | if (ACPI_FAILURE(status)) { | |
787 | return_ACPI_STATUS(status); | |
788 | } | |
789 | ||
790 | status = acpi_hw_enable_all_wakeup_gpes(); | |
791 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
792 | ||
793 | return_ACPI_STATUS(status); | |
794 | } | |
795 | ||
796 | ACPI_EXPORT_SYMBOL(acpi_enable_all_wakeup_gpes) | |
797 | ||
ea128834 RW |
798 | /****************************************************************************** |
799 | * | |
800 | * FUNCTION: acpi_any_gpe_status_set | |
801 | * | |
0ce792d6 | 802 | * PARAMETERS: gpe_skip_number - Number of the GPE to skip |
ea128834 RW |
803 | * |
804 | * RETURN: Whether or not the status bit is set for any GPE | |
805 | * | |
0ce792d6 RW |
806 | * DESCRIPTION: Check the status bits of all enabled GPEs, except for the one |
807 | * represented by the "skip" argument, and return TRUE if any of | |
808 | * them is set or FALSE otherwise. | |
ea128834 RW |
809 | * |
810 | ******************************************************************************/ | |
0ce792d6 | 811 | u32 acpi_any_gpe_status_set(u32 gpe_skip_number) |
ea128834 RW |
812 | { |
813 | acpi_status status; | |
0ce792d6 | 814 | acpi_handle gpe_device; |
ea128834 RW |
815 | u8 ret; |
816 | ||
817 | ACPI_FUNCTION_TRACE(acpi_any_gpe_status_set); | |
818 | ||
819 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); | |
820 | if (ACPI_FAILURE(status)) { | |
821 | return (FALSE); | |
822 | } | |
823 | ||
0ce792d6 RW |
824 | status = acpi_get_gpe_device(gpe_skip_number, &gpe_device); |
825 | if (ACPI_FAILURE(status)) { | |
826 | gpe_device = NULL; | |
827 | } | |
828 | ||
829 | ret = acpi_hw_check_all_gpes(gpe_device, gpe_skip_number); | |
ea128834 RW |
830 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); |
831 | ||
832 | return (ret); | |
833 | } | |
834 | ||
835 | ACPI_EXPORT_SYMBOL(acpi_any_gpe_status_set) | |
836 | ||
3cfd53d5 LM |
837 | /******************************************************************************* |
838 | * | |
839 | * FUNCTION: acpi_install_gpe_block | |
840 | * | |
841 | * PARAMETERS: gpe_device - Handle to the parent GPE Block Device | |
ba494bee | 842 | * gpe_block_address - Address and space_ID |
3cfd53d5 LM |
843 | * register_count - Number of GPE register pairs in the block |
844 | * interrupt_number - H/W interrupt for the block | |
845 | * | |
846 | * RETURN: Status | |
847 | * | |
da503373 LM |
848 | * DESCRIPTION: Create and Install a block of GPE registers. The GPEs are not |
849 | * enabled here. | |
3cfd53d5 LM |
850 | * |
851 | ******************************************************************************/ | |
852 | acpi_status | |
853 | acpi_install_gpe_block(acpi_handle gpe_device, | |
854 | struct acpi_generic_address *gpe_block_address, | |
855 | u32 register_count, u32 interrupt_number) | |
856 | { | |
3a37898d | 857 | acpi_status status; |
3cfd53d5 LM |
858 | union acpi_operand_object *obj_desc; |
859 | struct acpi_namespace_node *node; | |
860 | struct acpi_gpe_block_info *gpe_block; | |
861 | ||
862 | ACPI_FUNCTION_TRACE(acpi_install_gpe_block); | |
863 | ||
864 | if ((!gpe_device) || (!gpe_block_address) || (!register_count)) { | |
865 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
866 | } | |
867 | ||
868 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); | |
869 | if (ACPI_FAILURE(status)) { | |
68aafc35 | 870 | return_ACPI_STATUS(status); |
3cfd53d5 LM |
871 | } |
872 | ||
873 | node = acpi_ns_validate_handle(gpe_device); | |
874 | if (!node) { | |
875 | status = AE_BAD_PARAMETER; | |
876 | goto unlock_and_exit; | |
877 | } | |
878 | ||
9186fb58 BM |
879 | /* Validate the parent device */ |
880 | ||
881 | if (node->type != ACPI_TYPE_DEVICE) { | |
882 | status = AE_TYPE; | |
883 | goto unlock_and_exit; | |
884 | } | |
885 | ||
886 | if (node->object) { | |
887 | status = AE_ALREADY_EXISTS; | |
888 | goto unlock_and_exit; | |
889 | } | |
890 | ||
3cfd53d5 LM |
891 | /* |
892 | * For user-installed GPE Block Devices, the gpe_block_base_number | |
893 | * is always zero | |
894 | */ | |
7505da4c BM |
895 | status = acpi_ev_create_gpe_block(node, gpe_block_address->address, |
896 | gpe_block_address->space_id, | |
897 | register_count, 0, interrupt_number, | |
898 | &gpe_block); | |
3cfd53d5 LM |
899 | if (ACPI_FAILURE(status)) { |
900 | goto unlock_and_exit; | |
901 | } | |
902 | ||
903 | /* Install block in the device_object attached to the node */ | |
904 | ||
905 | obj_desc = acpi_ns_get_attached_object(node); | |
906 | if (!obj_desc) { | |
907 | ||
908 | /* | |
909 | * No object, create a new one (Device nodes do not always have | |
910 | * an attached object) | |
911 | */ | |
912 | obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_DEVICE); | |
913 | if (!obj_desc) { | |
914 | status = AE_NO_MEMORY; | |
915 | goto unlock_and_exit; | |
916 | } | |
917 | ||
918 | status = | |
919 | acpi_ns_attach_object(node, obj_desc, ACPI_TYPE_DEVICE); | |
920 | ||
921 | /* Remove local reference to the object */ | |
922 | ||
923 | acpi_ut_remove_reference(obj_desc); | |
924 | ||
925 | if (ACPI_FAILURE(status)) { | |
926 | goto unlock_and_exit; | |
927 | } | |
928 | } | |
929 | ||
930 | /* Now install the GPE block in the device_object */ | |
931 | ||
932 | obj_desc->device.gpe_block = gpe_block; | |
933 | ||
10622bf8 | 934 | unlock_and_exit: |
3cfd53d5 LM |
935 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
936 | return_ACPI_STATUS(status); | |
937 | } | |
938 | ||
939 | ACPI_EXPORT_SYMBOL(acpi_install_gpe_block) | |
940 | ||
941 | /******************************************************************************* | |
942 | * | |
943 | * FUNCTION: acpi_remove_gpe_block | |
944 | * | |
945 | * PARAMETERS: gpe_device - Handle to the parent GPE Block Device | |
946 | * | |
947 | * RETURN: Status | |
948 | * | |
949 | * DESCRIPTION: Remove a previously installed block of GPE registers | |
950 | * | |
951 | ******************************************************************************/ | |
952 | acpi_status acpi_remove_gpe_block(acpi_handle gpe_device) | |
953 | { | |
954 | union acpi_operand_object *obj_desc; | |
955 | acpi_status status; | |
956 | struct acpi_namespace_node *node; | |
957 | ||
958 | ACPI_FUNCTION_TRACE(acpi_remove_gpe_block); | |
959 | ||
960 | if (!gpe_device) { | |
961 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
962 | } | |
963 | ||
964 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); | |
965 | if (ACPI_FAILURE(status)) { | |
68aafc35 | 966 | return_ACPI_STATUS(status); |
3cfd53d5 LM |
967 | } |
968 | ||
969 | node = acpi_ns_validate_handle(gpe_device); | |
970 | if (!node) { | |
971 | status = AE_BAD_PARAMETER; | |
972 | goto unlock_and_exit; | |
973 | } | |
974 | ||
9186fb58 BM |
975 | /* Validate the parent device */ |
976 | ||
977 | if (node->type != ACPI_TYPE_DEVICE) { | |
978 | status = AE_TYPE; | |
979 | goto unlock_and_exit; | |
980 | } | |
981 | ||
3cfd53d5 LM |
982 | /* Get the device_object attached to the node */ |
983 | ||
984 | obj_desc = acpi_ns_get_attached_object(node); | |
985 | if (!obj_desc || !obj_desc->device.gpe_block) { | |
986 | return_ACPI_STATUS(AE_NULL_OBJECT); | |
987 | } | |
988 | ||
989 | /* Delete the GPE block (but not the device_object) */ | |
990 | ||
991 | status = acpi_ev_delete_gpe_block(obj_desc->device.gpe_block); | |
992 | if (ACPI_SUCCESS(status)) { | |
993 | obj_desc->device.gpe_block = NULL; | |
994 | } | |
995 | ||
10622bf8 | 996 | unlock_and_exit: |
3cfd53d5 LM |
997 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
998 | return_ACPI_STATUS(status); | |
999 | } | |
1000 | ||
1001 | ACPI_EXPORT_SYMBOL(acpi_remove_gpe_block) | |
1002 | ||
1003 | /******************************************************************************* | |
1004 | * | |
1005 | * FUNCTION: acpi_get_gpe_device | |
1006 | * | |
ba494bee | 1007 | * PARAMETERS: index - System GPE index (0-current_gpe_count) |
3cfd53d5 LM |
1008 | * gpe_device - Where the parent GPE Device is returned |
1009 | * | |
1010 | * RETURN: Status | |
1011 | * | |
1012 | * DESCRIPTION: Obtain the GPE device associated with the input index. A NULL | |
1013 | * gpe device indicates that the gpe number is contained in one of | |
1014 | * the FADT-defined gpe blocks. Otherwise, the GPE block device. | |
1015 | * | |
1016 | ******************************************************************************/ | |
f5c1e1c5 | 1017 | acpi_status acpi_get_gpe_device(u32 index, acpi_handle *gpe_device) |
3cfd53d5 LM |
1018 | { |
1019 | struct acpi_gpe_device_info info; | |
1020 | acpi_status status; | |
1021 | ||
1022 | ACPI_FUNCTION_TRACE(acpi_get_gpe_device); | |
1023 | ||
1024 | if (!gpe_device) { | |
1025 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
1026 | } | |
1027 | ||
1028 | if (index >= acpi_current_gpe_count) { | |
1029 | return_ACPI_STATUS(AE_NOT_EXIST); | |
1030 | } | |
1031 | ||
1032 | /* Setup and walk the GPE list */ | |
1033 | ||
1034 | info.index = index; | |
1035 | info.status = AE_NOT_EXIST; | |
1036 | info.gpe_device = NULL; | |
1037 | info.next_block_base_index = 0; | |
1038 | ||
1039 | status = acpi_ev_walk_gpe_list(acpi_ev_get_gpe_device, &info); | |
1040 | if (ACPI_FAILURE(status)) { | |
1041 | return_ACPI_STATUS(status); | |
1042 | } | |
1043 | ||
3a37898d | 1044 | *gpe_device = ACPI_CAST_PTR(acpi_handle, info.gpe_device); |
3cfd53d5 LM |
1045 | return_ACPI_STATUS(info.status); |
1046 | } | |
1047 | ||
1048 | ACPI_EXPORT_SYMBOL(acpi_get_gpe_device) | |
33620c54 | 1049 | #endif /* !ACPI_REDUCED_HARDWARE */ |