Merge tag 'trace-v5.11-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt...
[linux/fpc-iii.git] / drivers / acpi / acpica / evxfgpe.c
blob3be60673e461b40af62f4af2320fa02b43e468f7
1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
2 /******************************************************************************
4 * Module Name: evxfgpe - External Interfaces for General Purpose Events (GPEs)
6 * Copyright (C) 2000 - 2020, Intel Corp.
8 *****************************************************************************/
10 #define EXPORT_ACPI_INTERFACES
12 #include <acpi/acpi.h>
13 #include "accommon.h"
14 #include "acevents.h"
15 #include "acnamesp.h"
17 #define _COMPONENT ACPI_EVENTS
18 ACPI_MODULE_NAME("evxfgpe")
20 #if (!ACPI_REDUCED_HARDWARE) /* Entire module */
21 /*******************************************************************************
23 * FUNCTION: acpi_update_all_gpes
25 * PARAMETERS: None
27 * RETURN: Status
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.)
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.
41 ******************************************************************************/
43 acpi_status acpi_update_all_gpes(void)
45 acpi_status status;
46 u8 is_polling_needed = FALSE;
48 ACPI_FUNCTION_TRACE(acpi_update_all_gpes);
50 status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
51 if (ACPI_FAILURE(status)) {
52 return_ACPI_STATUS(status);
55 if (acpi_gbl_all_gpes_initialized) {
56 goto unlock_and_exit;
59 status = acpi_ev_walk_gpe_list(acpi_ev_initialize_gpe_block,
60 &is_polling_needed);
61 if (ACPI_SUCCESS(status)) {
62 acpi_gbl_all_gpes_initialized = TRUE;
65 unlock_and_exit:
66 (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
68 if (is_polling_needed && acpi_gbl_all_gpes_initialized) {
70 /* Poll GPEs to handle already triggered events */
72 acpi_ev_gpe_detect(acpi_gbl_gpe_xrupt_list_head);
74 return_ACPI_STATUS(status);
77 ACPI_EXPORT_SYMBOL(acpi_update_all_gpes)
79 /*******************************************************************************
81 * FUNCTION: acpi_enable_gpe
83 * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1
84 * gpe_number - GPE level within the GPE block
86 * RETURN: Status
88 * DESCRIPTION: Add a reference to a GPE. On the first reference, the GPE is
89 * hardware-enabled.
91 ******************************************************************************/
92 acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number)
94 acpi_status status = AE_BAD_PARAMETER;
95 struct acpi_gpe_event_info *gpe_event_info;
96 acpi_cpu_flags flags;
98 ACPI_FUNCTION_TRACE(acpi_enable_gpe);
100 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
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.
107 gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
108 if (gpe_event_info) {
109 if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) !=
110 ACPI_GPE_DISPATCH_NONE) {
111 status = acpi_ev_add_gpe_reference(gpe_event_info, TRUE);
112 if (ACPI_SUCCESS(status) &&
113 ACPI_GPE_IS_POLLING_NEEDED(gpe_event_info)) {
115 /* Poll edge-triggered GPEs to handle existing events */
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);
123 } else {
124 status = AE_NO_HANDLER;
128 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
129 return_ACPI_STATUS(status);
131 ACPI_EXPORT_SYMBOL(acpi_enable_gpe)
133 /*******************************************************************************
135 * FUNCTION: acpi_disable_gpe
137 * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1
138 * gpe_number - GPE level within the GPE block
140 * RETURN: Status
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)
146 ******************************************************************************/
148 acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number)
150 acpi_status status = AE_BAD_PARAMETER;
151 struct acpi_gpe_event_info *gpe_event_info;
152 acpi_cpu_flags flags;
154 ACPI_FUNCTION_TRACE(acpi_disable_gpe);
156 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
158 /* Ensure that we have a valid GPE number */
160 gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
161 if (gpe_event_info) {
162 status = acpi_ev_remove_gpe_reference(gpe_event_info) ;
165 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
166 return_ACPI_STATUS(status);
169 ACPI_EXPORT_SYMBOL(acpi_disable_gpe)
171 /*******************************************************************************
173 * FUNCTION: acpi_set_gpe
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
179 * RETURN: Status
181 * DESCRIPTION: Enable or disable an individual GPE. This function bypasses
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
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.
198 ******************************************************************************/
199 acpi_status acpi_set_gpe(acpi_handle gpe_device, u32 gpe_number, u8 action)
201 struct acpi_gpe_event_info *gpe_event_info;
202 acpi_status status;
203 acpi_cpu_flags flags;
205 ACPI_FUNCTION_TRACE(acpi_set_gpe);
207 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
209 /* Ensure that we have a valid GPE number */
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;
217 /* Perform the action */
219 switch (action) {
220 case ACPI_GPE_ENABLE:
222 status = acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_ENABLE);
223 gpe_event_info->disable_for_dispatch = FALSE;
224 break;
226 case ACPI_GPE_DISABLE:
228 status = acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_DISABLE);
229 gpe_event_info->disable_for_dispatch = TRUE;
230 break;
232 default:
234 status = AE_BAD_PARAMETER;
235 break;
238 unlock_and_exit:
239 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
240 return_ACPI_STATUS(status);
243 ACPI_EXPORT_SYMBOL(acpi_set_gpe)
245 /*******************************************************************************
247 * FUNCTION: acpi_mask_gpe
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
253 * RETURN: Status
255 * DESCRIPTION: Unconditionally mask/unmask the an individual GPE, ex., to
256 * prevent a GPE flooding.
258 ******************************************************************************/
259 acpi_status acpi_mask_gpe(acpi_handle gpe_device, u32 gpe_number, u8 is_masked)
261 struct acpi_gpe_event_info *gpe_event_info;
262 acpi_status status;
263 acpi_cpu_flags flags;
265 ACPI_FUNCTION_TRACE(acpi_mask_gpe);
267 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
269 /* Ensure that we have a valid GPE number */
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;
277 status = acpi_ev_mask_gpe(gpe_event_info, is_masked);
279 unlock_and_exit:
280 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
281 return_ACPI_STATUS(status);
284 ACPI_EXPORT_SYMBOL(acpi_mask_gpe)
286 /*******************************************************************************
288 * FUNCTION: acpi_mark_gpe_for_wake
290 * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1
291 * gpe_number - GPE level within the GPE block
293 * RETURN: Status
295 * DESCRIPTION: Mark a GPE as having the ability to wake the system. Simply
296 * sets the ACPI_GPE_CAN_WAKE flag.
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).
305 ******************************************************************************/
306 acpi_status acpi_mark_gpe_for_wake(acpi_handle gpe_device, u32 gpe_number)
308 struct acpi_gpe_event_info *gpe_event_info;
309 acpi_status status = AE_BAD_PARAMETER;
310 acpi_cpu_flags flags;
312 ACPI_FUNCTION_TRACE(acpi_mark_gpe_for_wake);
314 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
316 /* Ensure that we have a valid GPE number */
318 gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
319 if (gpe_event_info) {
321 /* Mark the GPE as a possible wake event */
323 gpe_event_info->flags |= ACPI_GPE_CAN_WAKE;
324 status = AE_OK;
327 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
328 return_ACPI_STATUS(status);
331 ACPI_EXPORT_SYMBOL(acpi_mark_gpe_for_wake)
333 /*******************************************************************************
335 * FUNCTION: acpi_setup_gpe_for_wake
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
341 * RETURN: Status
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.
350 ******************************************************************************/
351 acpi_status
352 acpi_setup_gpe_for_wake(acpi_handle wake_device,
353 acpi_handle gpe_device, u32 gpe_number)
355 acpi_status status;
356 struct acpi_gpe_event_info *gpe_event_info;
357 struct acpi_namespace_node *device_node;
358 struct acpi_gpe_notify_info *notify;
359 struct acpi_gpe_notify_info *new_notify;
360 acpi_cpu_flags flags;
362 ACPI_FUNCTION_TRACE(acpi_setup_gpe_for_wake);
364 /* Parameter Validation */
366 if (!wake_device) {
368 * By forcing wake_device to be valid, we automatically enable the
369 * implicit notify feature on all hosts.
371 return_ACPI_STATUS(AE_BAD_PARAMETER);
374 /* Handle root object case */
376 if (wake_device == ACPI_ROOT_OBJECT) {
377 device_node = acpi_gbl_root_node;
378 } else {
379 device_node =
380 ACPI_CAST_PTR(struct acpi_namespace_node, wake_device);
383 /* Validate wake_device is of type Device */
385 if (device_node->type != ACPI_TYPE_DEVICE) {
386 return_ACPI_STATUS (AE_BAD_PARAMETER);
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.
394 new_notify = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_notify_info));
395 if (!new_notify) {
396 return_ACPI_STATUS(AE_NO_MEMORY);
399 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
401 /* Ensure that we have a valid GPE number */
403 gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
404 if (!gpe_event_info) {
405 status = AE_BAD_PARAMETER;
406 goto unlock_and_exit;
410 * If there is no method or handler for this GPE, then the
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
413 * level-triggered (for windows compatibility).
415 if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
416 ACPI_GPE_DISPATCH_NONE) {
418 * This is the first device for implicit notify on this GPE.
419 * Just set the flags here, and enter the NOTIFY block below.
421 gpe_event_info->flags =
422 (ACPI_GPE_DISPATCH_NOTIFY | ACPI_GPE_LEVEL_TRIGGERED);
423 } else if (gpe_event_info->flags & ACPI_GPE_AUTO_ENABLED) {
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.
429 (void)acpi_ev_remove_gpe_reference(gpe_event_info);
430 gpe_event_info->flags &= ~ACPI_GPE_AUTO_ENABLED;
434 * If we already have an implicit notify on this GPE, add
435 * this device to the notify list.
437 if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
438 ACPI_GPE_DISPATCH_NOTIFY) {
440 /* Ensure that the device is not already in the list */
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;
448 notify = notify->next;
451 /* Add this device to the notify list for this GPE */
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;
459 /* Mark the GPE as a possible wake event */
461 gpe_event_info->flags |= ACPI_GPE_CAN_WAKE;
462 status = AE_OK;
464 unlock_and_exit:
465 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
467 /* Delete the notify object if it was not used above */
469 if (new_notify) {
470 ACPI_FREE(new_notify);
472 return_ACPI_STATUS(status);
474 ACPI_EXPORT_SYMBOL(acpi_setup_gpe_for_wake)
476 /*******************************************************************************
478 * FUNCTION: acpi_set_gpe_wake_mask
480 * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1
481 * gpe_number - GPE level within the GPE block
482 * action - Enable or Disable
484 * RETURN: Status
486 * DESCRIPTION: Set or clear the GPE's wakeup enable mask bit. The GPE must
487 * already be marked as a WAKE GPE.
489 ******************************************************************************/
491 acpi_status
492 acpi_set_gpe_wake_mask(acpi_handle gpe_device, u32 gpe_number, u8 action)
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;
500 ACPI_FUNCTION_TRACE(acpi_set_gpe_wake_mask);
502 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
505 * Ensure that we have a valid GPE number and that this GPE is in
506 * fact a wake GPE
508 gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
509 if (!gpe_event_info) {
510 status = AE_BAD_PARAMETER;
511 goto unlock_and_exit;
514 if (!(gpe_event_info->flags & ACPI_GPE_CAN_WAKE)) {
515 status = AE_TYPE;
516 goto unlock_and_exit;
519 gpe_register_info = gpe_event_info->register_info;
520 if (!gpe_register_info) {
521 status = AE_NOT_EXIST;
522 goto unlock_and_exit;
525 register_bit = acpi_hw_get_gpe_register_bit(gpe_event_info);
527 /* Perform the action */
529 switch (action) {
530 case ACPI_GPE_ENABLE:
532 ACPI_SET_BIT(gpe_register_info->enable_for_wake,
533 (u8)register_bit);
534 break;
536 case ACPI_GPE_DISABLE:
538 ACPI_CLEAR_BIT(gpe_register_info->enable_for_wake,
539 (u8)register_bit);
540 break;
542 default:
544 ACPI_ERROR((AE_INFO, "%u, Invalid action", action));
545 status = AE_BAD_PARAMETER;
546 break;
549 unlock_and_exit:
550 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
551 return_ACPI_STATUS(status);
554 ACPI_EXPORT_SYMBOL(acpi_set_gpe_wake_mask)
556 /*******************************************************************************
558 * FUNCTION: acpi_clear_gpe
560 * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1
561 * gpe_number - GPE level within the GPE block
563 * RETURN: Status
565 * DESCRIPTION: Clear an ACPI event (general purpose)
567 ******************************************************************************/
568 acpi_status acpi_clear_gpe(acpi_handle gpe_device, u32 gpe_number)
570 acpi_status status = AE_OK;
571 struct acpi_gpe_event_info *gpe_event_info;
572 acpi_cpu_flags flags;
574 ACPI_FUNCTION_TRACE(acpi_clear_gpe);
576 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
578 /* Ensure that we have a valid GPE number */
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;
586 status = acpi_hw_clear_gpe(gpe_event_info);
588 unlock_and_exit:
589 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
590 return_ACPI_STATUS(status);
593 ACPI_EXPORT_SYMBOL(acpi_clear_gpe)
595 /*******************************************************************************
597 * FUNCTION: acpi_get_gpe_status
599 * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1
600 * gpe_number - GPE level within the GPE block
601 * event_status - Where the current status of the event
602 * will be returned
604 * RETURN: Status
606 * DESCRIPTION: Get the current status of a GPE (signalled/not_signalled)
608 ******************************************************************************/
609 acpi_status
610 acpi_get_gpe_status(acpi_handle gpe_device,
611 u32 gpe_number, acpi_event_status *event_status)
613 acpi_status status = AE_OK;
614 struct acpi_gpe_event_info *gpe_event_info;
615 acpi_cpu_flags flags;
617 ACPI_FUNCTION_TRACE(acpi_get_gpe_status);
619 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
621 /* Ensure that we have a valid GPE number */
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;
629 /* Obtain status on the requested GPE number */
631 status = acpi_hw_get_gpe_status(gpe_event_info, event_status);
633 unlock_and_exit:
634 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
635 return_ACPI_STATUS(status);
638 ACPI_EXPORT_SYMBOL(acpi_get_gpe_status)
640 /*******************************************************************************
642 * FUNCTION: acpi_gispatch_gpe
644 * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1
645 * gpe_number - GPE level within the GPE block
647 * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
649 * DESCRIPTION: Detect and dispatch a General Purpose Event to either a function
650 * (e.g. EC) or method (e.g. _Lxx/_Exx) handler.
652 ******************************************************************************/
653 u32 acpi_dispatch_gpe(acpi_handle gpe_device, u32 gpe_number)
655 ACPI_FUNCTION_TRACE(acpi_dispatch_gpe);
657 return acpi_ev_detect_gpe(gpe_device, NULL, gpe_number);
660 ACPI_EXPORT_SYMBOL(acpi_dispatch_gpe)
662 /*******************************************************************************
664 * FUNCTION: acpi_finish_gpe
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
670 * RETURN: Status
672 * DESCRIPTION: Clear and conditionally re-enable a GPE. This completes the GPE
673 * processing. Intended for use by asynchronous host-installed
674 * GPE handlers. The GPE is only re-enabled if the enable_for_run bit
675 * is set in the GPE info.
677 ******************************************************************************/
678 acpi_status acpi_finish_gpe(acpi_handle gpe_device, u32 gpe_number)
680 struct acpi_gpe_event_info *gpe_event_info;
681 acpi_status status;
682 acpi_cpu_flags flags;
684 ACPI_FUNCTION_TRACE(acpi_finish_gpe);
686 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
688 /* Ensure that we have a valid GPE number */
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;
696 status = acpi_ev_finish_gpe(gpe_event_info);
698 unlock_and_exit:
699 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
700 return_ACPI_STATUS(status);
703 ACPI_EXPORT_SYMBOL(acpi_finish_gpe)
705 /******************************************************************************
707 * FUNCTION: acpi_disable_all_gpes
709 * PARAMETERS: None
711 * RETURN: Status
713 * DESCRIPTION: Disable and clear all GPEs in all GPE blocks
715 ******************************************************************************/
717 acpi_status acpi_disable_all_gpes(void)
719 acpi_status status;
721 ACPI_FUNCTION_TRACE(acpi_disable_all_gpes);
723 status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
724 if (ACPI_FAILURE(status)) {
725 return_ACPI_STATUS(status);
728 status = acpi_hw_disable_all_gpes();
729 (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
731 return_ACPI_STATUS(status);
734 ACPI_EXPORT_SYMBOL(acpi_disable_all_gpes)
736 /******************************************************************************
738 * FUNCTION: acpi_enable_all_runtime_gpes
740 * PARAMETERS: None
742 * RETURN: Status
744 * DESCRIPTION: Enable all "runtime" GPEs, in all GPE blocks
746 ******************************************************************************/
748 acpi_status acpi_enable_all_runtime_gpes(void)
750 acpi_status status;
752 ACPI_FUNCTION_TRACE(acpi_enable_all_runtime_gpes);
754 status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
755 if (ACPI_FAILURE(status)) {
756 return_ACPI_STATUS(status);
759 status = acpi_hw_enable_all_runtime_gpes();
760 (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
762 return_ACPI_STATUS(status);
765 ACPI_EXPORT_SYMBOL(acpi_enable_all_runtime_gpes)
767 /******************************************************************************
769 * FUNCTION: acpi_enable_all_wakeup_gpes
771 * PARAMETERS: None
773 * RETURN: Status
775 * DESCRIPTION: Enable all "wakeup" GPEs and disable all of the other GPEs, in
776 * all GPE blocks.
778 ******************************************************************************/
779 acpi_status acpi_enable_all_wakeup_gpes(void)
781 acpi_status status;
783 ACPI_FUNCTION_TRACE(acpi_enable_all_wakeup_gpes);
785 status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
786 if (ACPI_FAILURE(status)) {
787 return_ACPI_STATUS(status);
790 status = acpi_hw_enable_all_wakeup_gpes();
791 (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
793 return_ACPI_STATUS(status);
796 ACPI_EXPORT_SYMBOL(acpi_enable_all_wakeup_gpes)
798 /******************************************************************************
800 * FUNCTION: acpi_any_gpe_status_set
802 * PARAMETERS: gpe_skip_number - Number of the GPE to skip
804 * RETURN: Whether or not the status bit is set for any GPE
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.
810 ******************************************************************************/
811 u32 acpi_any_gpe_status_set(u32 gpe_skip_number)
813 acpi_status status;
814 acpi_handle gpe_device;
815 u8 ret;
817 ACPI_FUNCTION_TRACE(acpi_any_gpe_status_set);
819 status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
820 if (ACPI_FAILURE(status)) {
821 return (FALSE);
824 status = acpi_get_gpe_device(gpe_skip_number, &gpe_device);
825 if (ACPI_FAILURE(status)) {
826 gpe_device = NULL;
829 ret = acpi_hw_check_all_gpes(gpe_device, gpe_skip_number);
830 (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
832 return (ret);
835 ACPI_EXPORT_SYMBOL(acpi_any_gpe_status_set)
837 /*******************************************************************************
839 * FUNCTION: acpi_install_gpe_block
841 * PARAMETERS: gpe_device - Handle to the parent GPE Block Device
842 * gpe_block_address - Address and space_ID
843 * register_count - Number of GPE register pairs in the block
844 * interrupt_number - H/W interrupt for the block
846 * RETURN: Status
848 * DESCRIPTION: Create and Install a block of GPE registers. The GPEs are not
849 * enabled here.
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)
857 acpi_status status;
858 union acpi_operand_object *obj_desc;
859 struct acpi_namespace_node *node;
860 struct acpi_gpe_block_info *gpe_block;
862 ACPI_FUNCTION_TRACE(acpi_install_gpe_block);
864 if ((!gpe_device) || (!gpe_block_address) || (!register_count)) {
865 return_ACPI_STATUS(AE_BAD_PARAMETER);
868 status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
869 if (ACPI_FAILURE(status)) {
870 return_ACPI_STATUS(status);
873 node = acpi_ns_validate_handle(gpe_device);
874 if (!node) {
875 status = AE_BAD_PARAMETER;
876 goto unlock_and_exit;
879 /* Validate the parent device */
881 if (node->type != ACPI_TYPE_DEVICE) {
882 status = AE_TYPE;
883 goto unlock_and_exit;
886 if (node->object) {
887 status = AE_ALREADY_EXISTS;
888 goto unlock_and_exit;
892 * For user-installed GPE Block Devices, the gpe_block_base_number
893 * is always zero
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);
899 if (ACPI_FAILURE(status)) {
900 goto unlock_and_exit;
903 /* Install block in the device_object attached to the node */
905 obj_desc = acpi_ns_get_attached_object(node);
906 if (!obj_desc) {
909 * No object, create a new one (Device nodes do not always have
910 * an attached object)
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;
918 status =
919 acpi_ns_attach_object(node, obj_desc, ACPI_TYPE_DEVICE);
921 /* Remove local reference to the object */
923 acpi_ut_remove_reference(obj_desc);
925 if (ACPI_FAILURE(status)) {
926 goto unlock_and_exit;
930 /* Now install the GPE block in the device_object */
932 obj_desc->device.gpe_block = gpe_block;
934 unlock_and_exit:
935 (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
936 return_ACPI_STATUS(status);
939 ACPI_EXPORT_SYMBOL(acpi_install_gpe_block)
941 /*******************************************************************************
943 * FUNCTION: acpi_remove_gpe_block
945 * PARAMETERS: gpe_device - Handle to the parent GPE Block Device
947 * RETURN: Status
949 * DESCRIPTION: Remove a previously installed block of GPE registers
951 ******************************************************************************/
952 acpi_status acpi_remove_gpe_block(acpi_handle gpe_device)
954 union acpi_operand_object *obj_desc;
955 acpi_status status;
956 struct acpi_namespace_node *node;
958 ACPI_FUNCTION_TRACE(acpi_remove_gpe_block);
960 if (!gpe_device) {
961 return_ACPI_STATUS(AE_BAD_PARAMETER);
964 status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
965 if (ACPI_FAILURE(status)) {
966 return_ACPI_STATUS(status);
969 node = acpi_ns_validate_handle(gpe_device);
970 if (!node) {
971 status = AE_BAD_PARAMETER;
972 goto unlock_and_exit;
975 /* Validate the parent device */
977 if (node->type != ACPI_TYPE_DEVICE) {
978 status = AE_TYPE;
979 goto unlock_and_exit;
982 /* Get the device_object attached to the node */
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);
989 /* Delete the GPE block (but not the device_object) */
991 status = acpi_ev_delete_gpe_block(obj_desc->device.gpe_block);
992 if (ACPI_SUCCESS(status)) {
993 obj_desc->device.gpe_block = NULL;
996 unlock_and_exit:
997 (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
998 return_ACPI_STATUS(status);
1001 ACPI_EXPORT_SYMBOL(acpi_remove_gpe_block)
1003 /*******************************************************************************
1005 * FUNCTION: acpi_get_gpe_device
1007 * PARAMETERS: index - System GPE index (0-current_gpe_count)
1008 * gpe_device - Where the parent GPE Device is returned
1010 * RETURN: Status
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.
1016 ******************************************************************************/
1017 acpi_status acpi_get_gpe_device(u32 index, acpi_handle *gpe_device)
1019 struct acpi_gpe_device_info info;
1020 acpi_status status;
1022 ACPI_FUNCTION_TRACE(acpi_get_gpe_device);
1024 if (!gpe_device) {
1025 return_ACPI_STATUS(AE_BAD_PARAMETER);
1028 if (index >= acpi_current_gpe_count) {
1029 return_ACPI_STATUS(AE_NOT_EXIST);
1032 /* Setup and walk the GPE list */
1034 info.index = index;
1035 info.status = AE_NOT_EXIST;
1036 info.gpe_device = NULL;
1037 info.next_block_base_index = 0;
1039 status = acpi_ev_walk_gpe_list(acpi_ev_get_gpe_device, &info);
1040 if (ACPI_FAILURE(status)) {
1041 return_ACPI_STATUS(status);
1044 *gpe_device = ACPI_CAST_PTR(acpi_handle, info.gpe_device);
1045 return_ACPI_STATUS(info.status);
1048 ACPI_EXPORT_SYMBOL(acpi_get_gpe_device)
1049 #endif /* !ACPI_REDUCED_HARDWARE */