Quelle evxfgpe.c
Sprache: C
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/******************************************************************************
*
* Module Name : evxfgpe - External Interfaces for General Purpose Events ( GPEs )
*
* Copyright ( C ) 2000 - 2025 , Intel Corp .
*
*****************************************************************************/
#define EXPORT_ACPI_INTERFACES
#include <acpi/acpi.h>
#include "accommon.h"
#include "acevents.h"
#include "acnamesp.h"
#define _COMPONENT ACPI_EVENTS
ACPI_MODULE_NAME("evxfgpe" )
#if (!ACPI_REDUCED_HARDWARE) /* Entire module */
/*******************************************************************************
*
* FUNCTION : acpi_update_all_gpes
*
* PARAMETERS : None
*
* RETURN : Status
*
* DESCRIPTION : Complete GPE initialization and enable all GPEs that have
* associated _ Lxx or _ Exx methods and are not pointed to by any
* device _ PRW methods ( this indicates that these GPEs are
* generally intended for system or device wakeup . Such GPEs
* have to be enabled directly when the devices whose _ PRW
* methods point to them are set up for wakeup signaling . )
*
* NOTE : Should be called after any GPEs are added to the system . Primarily ,
* after the system _ PRW methods have been run , but also after a GPE Block
* Device has been added or if any new GPE methods have been added via a
* dynamic table load .
*
******************************************************************************/
acpi_status acpi_update_all_gpes(void )
{
acpi_status status;
u8 is_polling_needed = FALSE ;
ACPI_FUNCTION_TRACE(acpi_update_all_gpes);
status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
if (acpi_gbl_all_gpes_initialized) {
goto unlock_and_exit;
}
status = acpi_ev_walk_gpe_list(acpi_ev_initialize_gpe_block,
&is_polling_needed);
if (ACPI_SUCCESS(status)) {
acpi_gbl_all_gpes_initialized = TRUE ;
}
unlock_and_exit:
(void )acpi_ut_release_mutex(ACPI_MTX_EVENTS);
if (is_polling_needed && acpi_gbl_all_gpes_initialized) {
/* Poll GPEs to handle already triggered events */
acpi_ev_gpe_detect(acpi_gbl_gpe_xrupt_list_head);
}
return_ACPI_STATUS(status);
}
ACPI_EXPORT_SYMBOL(acpi_update_all_gpes)
/*******************************************************************************
*
* FUNCTION : acpi_enable_gpe
*
* PARAMETERS : gpe_device - Parent GPE Device . NULL for GPE0 / GPE1
* gpe_number - GPE level within the GPE block
*
* RETURN : Status
*
* DESCRIPTION : Add a reference to a GPE . On the first reference , the GPE is
* hardware - enabled .
*
******************************************************************************/
acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number)
{
acpi_status status = AE_BAD_PARAMETER;
struct acpi_gpe_event_info *gpe_event_info;
acpi_cpu_flags flags;
ACPI_FUNCTION_TRACE(acpi_enable_gpe);
flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
/*
* Ensure that we have a valid GPE number and that there is some way
* of handling the GPE ( handler or a GPE method ) . In other words , we
* won ' t allow a valid GPE to be enabled if there is no way to handle it .
*/
gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
if (gpe_event_info) {
if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) !=
ACPI_GPE_DISPATCH_NONE) {
status = acpi_ev_add_gpe_reference(gpe_event_info, TRUE );
if (ACPI_SUCCESS(status) &&
ACPI_GPE_IS_POLLING_NEEDED(gpe_event_info)) {
/* Poll edge-triggered GPEs to handle existing events */
acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
(void )acpi_ev_detect_gpe(gpe_device,
gpe_event_info,
gpe_number);
flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
}
} else {
status = AE_NO_HANDLER;
}
}
acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
return_ACPI_STATUS(status);
}
ACPI_EXPORT_SYMBOL(acpi_enable_gpe)
/*******************************************************************************
*
* FUNCTION : acpi_disable_gpe
*
* PARAMETERS : gpe_device - Parent GPE Device . NULL for GPE0 / GPE1
* gpe_number - GPE level within the GPE block
*
* RETURN : Status
*
* DESCRIPTION : Remove a reference to a GPE . When the last reference is
* removed , only then is the GPE disabled ( for runtime GPEs ) , or
* the GPE mask bit disabled ( for wake GPEs )
*
******************************************************************************/
acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number)
{
acpi_status status = AE_BAD_PARAMETER;
struct acpi_gpe_event_info *gpe_event_info;
acpi_cpu_flags flags;
ACPI_FUNCTION_TRACE(acpi_disable_gpe);
flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
/* Ensure that we have a valid GPE number */
gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
if (gpe_event_info) {
status = acpi_ev_remove_gpe_reference(gpe_event_info) ;
}
acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
return_ACPI_STATUS(status);
}
ACPI_EXPORT_SYMBOL(acpi_disable_gpe)
/*******************************************************************************
*
* FUNCTION : acpi_set_gpe
*
* PARAMETERS : gpe_device - Parent GPE Device . NULL for GPE0 / GPE1
* gpe_number - GPE level within the GPE block
* action - ACPI_GPE_ENABLE or ACPI_GPE_DISABLE
*
* RETURN : Status
*
* DESCRIPTION : Enable or disable an individual GPE . This function bypasses
* the reference count mechanism used in the acpi_enable_gpe ( ) ,
* acpi_disable_gpe ( ) interfaces .
* This API is typically used by the GPE raw handler mode driver
* to switch between the polling mode and the interrupt mode after
* the driver has enabled the GPE .
* The APIs should be invoked in this order :
* acpi_enable_gpe ( ) < - Ensure the reference count > 0
* acpi_set_gpe ( ACPI_GPE_DISABLE ) < - Enter polling mode
* acpi_set_gpe ( ACPI_GPE_ENABLE ) < - Leave polling mode
* acpi_disable_gpe ( ) < - Decrease the reference count
*
* Note : If a GPE is shared by 2 silicon components , then both the drivers
* should support GPE polling mode or disabling the GPE for long period
* for one driver may break the other . So use it with care since all
* firmware _ Lxx / _ Exx handlers currently rely on the GPE interrupt mode .
*
******************************************************************************/
acpi_status acpi_set_gpe(acpi_handle gpe_device, u32 gpe_number, u8 action)
{
struct acpi_gpe_event_info *gpe_event_info;
acpi_status status;
acpi_cpu_flags flags;
ACPI_FUNCTION_TRACE(acpi_set_gpe);
flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
/* Ensure that we have a valid GPE number */
gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
if (!gpe_event_info) {
status = AE_BAD_PARAMETER;
goto unlock_and_exit;
}
/* Perform the action */
switch (action) {
case ACPI_GPE_ENABLE:
status = acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_ENABLE);
gpe_event_info->disable_for_dispatch = FALSE ;
break ;
case ACPI_GPE_DISABLE:
status = acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_DISABLE);
gpe_event_info->disable_for_dispatch = TRUE ;
break ;
default :
status = AE_BAD_PARAMETER;
break ;
}
unlock_and_exit:
acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
return_ACPI_STATUS(status);
}
ACPI_EXPORT_SYMBOL(acpi_set_gpe)
/*******************************************************************************
*
* FUNCTION : acpi_mask_gpe
*
* PARAMETERS : gpe_device - Parent GPE Device . NULL for GPE0 / GPE1
* gpe_number - GPE level within the GPE block
* is_masked - Whether the GPE is masked or not
*
* RETURN : Status
*
* DESCRIPTION : Unconditionally mask / unmask the an individual GPE , ex . , to
* prevent a GPE flooding .
*
******************************************************************************/
acpi_status acpi_mask_gpe(acpi_handle gpe_device, u32 gpe_number, u8 is_masked)
{
struct acpi_gpe_event_info *gpe_event_info;
acpi_status status;
acpi_cpu_flags flags;
ACPI_FUNCTION_TRACE(acpi_mask_gpe);
flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
/* Ensure that we have a valid GPE number */
gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
if (!gpe_event_info) {
status = AE_BAD_PARAMETER;
goto unlock_and_exit;
}
status = acpi_ev_mask_gpe(gpe_event_info, is_masked);
unlock_and_exit:
acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
return_ACPI_STATUS(status);
}
ACPI_EXPORT_SYMBOL(acpi_mask_gpe)
/*******************************************************************************
*
* FUNCTION : acpi_mark_gpe_for_wake
*
* PARAMETERS : gpe_device - Parent GPE Device . NULL for GPE0 / GPE1
* gpe_number - GPE level within the GPE block
*
* RETURN : Status
*
* DESCRIPTION : Mark a GPE as having the ability to wake the system . Simply
* sets the ACPI_GPE_CAN_WAKE flag .
*
* Some potential callers of acpi_setup_gpe_for_wake may know in advance that
* there won ' t be any notify handlers installed for device wake notifications
* from the given GPE ( one example is a button GPE in Linux ) . For these cases ,
* acpi_mark_gpe_for_wake should be used instead of acpi_setup_gpe_for_wake .
* This will set the ACPI_GPE_CAN_WAKE flag for the GPE without trying to
* setup implicit wake notification for it ( since there ' s no handler method ) .
*
******************************************************************************/
acpi_status acpi_mark_gpe_for_wake(acpi_handle gpe_device, u32 gpe_number)
{
struct acpi_gpe_event_info *gpe_event_info;
acpi_status status = AE_BAD_PARAMETER;
acpi_cpu_flags flags;
ACPI_FUNCTION_TRACE(acpi_mark_gpe_for_wake);
flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
/* Ensure that we have a valid GPE number */
gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
if (gpe_event_info) {
/* Mark the GPE as a possible wake event */
gpe_event_info->flags |= ACPI_GPE_CAN_WAKE;
status = AE_OK;
}
acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
return_ACPI_STATUS(status);
}
ACPI_EXPORT_SYMBOL(acpi_mark_gpe_for_wake)
/*******************************************************************************
*
* FUNCTION : acpi_setup_gpe_for_wake
*
* PARAMETERS : wake_device - Device associated with the GPE ( via _ PRW )
* gpe_device - Parent GPE Device . NULL for GPE0 / GPE1
* gpe_number - GPE level within the GPE block
*
* RETURN : Status
*
* DESCRIPTION : Mark a GPE as having the ability to wake the system . This
* interface is intended to be used as the host executes the
* _ PRW methods ( Power Resources for Wake ) in the system tables .
* Each _ PRW appears under a Device Object ( The wake_device ) , and
* contains the info for the wake GPE associated with the
* wake_device .
*
******************************************************************************/
acpi_status
acpi_setup_gpe_for_wake(acpi_handle wake_device,
acpi_handle gpe_device, u32 gpe_number)
{
acpi_status status;
struct acpi_gpe_event_info *gpe_event_info;
struct acpi_namespace_node *device_node;
struct acpi_gpe_notify_info *notify;
struct acpi_gpe_notify_info *new_notify;
acpi_cpu_flags flags;
ACPI_FUNCTION_TRACE(acpi_setup_gpe_for_wake);
/* Parameter Validation */
if (!wake_device) {
/*
* By forcing wake_device to be valid , we automatically enable the
* implicit notify feature on all hosts .
*/
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
/* Handle root object case */
if (wake_device == ACPI_ROOT_OBJECT) {
device_node = acpi_gbl_root_node;
} else {
device_node =
ACPI_CAST_PTR(struct acpi_namespace_node, wake_device);
}
/* Validate wake_device is of type Device */
if (device_node->type != ACPI_TYPE_DEVICE) {
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/*
* Allocate a new notify object up front , in case it is needed .
* Memory allocation while holding a spinlock is a big no - no
* on some hosts .
*/
new_notify = ACPI_ALLOCATE_ZEROED(sizeof (struct acpi_gpe_notify_info));
if (!new_notify) {
return_ACPI_STATUS(AE_NO_MEMORY);
}
flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
/* Ensure that we have a valid GPE number */
gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
if (!gpe_event_info) {
status = AE_BAD_PARAMETER;
goto unlock_and_exit;
}
/*
* If there is no method or handler for this GPE , then the
* wake_device will be notified whenever this GPE fires . This is
* known as an " implicit notify " . Note : The GPE is assumed to be
* level - triggered ( for windows compatibility ) .
*/
if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
ACPI_GPE_DISPATCH_NONE) {
/*
* This is the first device for implicit notify on this GPE .
* Just set the flags here , and enter the NOTIFY block below .
*/
gpe_event_info->flags =
(ACPI_GPE_DISPATCH_NOTIFY | ACPI_GPE_LEVEL_TRIGGERED);
} else if (gpe_event_info->flags & ACPI_GPE_AUTO_ENABLED) {
/*
* A reference to this GPE has been added during the GPE block
* initialization , so drop it now to prevent the GPE from being
* permanently enabled and clear its ACPI_GPE_AUTO_ENABLED flag .
*/
(void )acpi_ev_remove_gpe_reference(gpe_event_info);
gpe_event_info->flags &= ~ACPI_GPE_AUTO_ENABLED;
}
/*
* If we already have an implicit notify on this GPE , add
* this device to the notify list .
*/
if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
ACPI_GPE_DISPATCH_NOTIFY) {
/* Ensure that the device is not already in the list */
notify = gpe_event_info->dispatch.notify_list;
while (notify) {
if (notify->device_node == device_node) {
status = AE_ALREADY_EXISTS;
goto unlock_and_exit;
}
notify = notify->next;
}
/* Add this device to the notify list for this GPE */
new_notify->device_node = device_node;
new_notify->next = gpe_event_info->dispatch.notify_list;
gpe_event_info->dispatch.notify_list = new_notify;
new_notify = NULL;
}
/* Mark the GPE as a possible wake event */
gpe_event_info->flags |= ACPI_GPE_CAN_WAKE;
status = AE_OK;
unlock_and_exit:
acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
/* Delete the notify object if it was not used above */
if (new_notify) {
ACPI_FREE(new_notify);
}
return_ACPI_STATUS(status);
}
ACPI_EXPORT_SYMBOL(acpi_setup_gpe_for_wake)
/*******************************************************************************
*
* FUNCTION : acpi_set_gpe_wake_mask
*
* PARAMETERS : gpe_device - Parent GPE Device . NULL for GPE0 / GPE1
* gpe_number - GPE level within the GPE block
* action - Enable or Disable
*
* RETURN : Status
*
* DESCRIPTION : Set or clear the GPE ' s wakeup enable mask bit . The GPE must
* already be marked as a WAKE GPE .
*
******************************************************************************/
acpi_status
acpi_set_gpe_wake_mask(acpi_handle gpe_device, u32 gpe_number, u8 action)
{
acpi_status status = AE_OK;
struct acpi_gpe_event_info *gpe_event_info;
struct acpi_gpe_register_info *gpe_register_info;
acpi_cpu_flags flags;
u32 register_bit;
ACPI_FUNCTION_TRACE(acpi_set_gpe_wake_mask);
flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
/*
* Ensure that we have a valid GPE number and that this GPE is in
* fact a wake GPE
*/
gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
if (!gpe_event_info) {
status = AE_BAD_PARAMETER;
goto unlock_and_exit;
}
if (!(gpe_event_info->flags & ACPI_GPE_CAN_WAKE)) {
status = AE_TYPE;
goto unlock_and_exit;
}
gpe_register_info = gpe_event_info->register_info;
if (!gpe_register_info) {
status = AE_NOT_EXIST;
goto unlock_and_exit;
}
register_bit = acpi_hw_get_gpe_register_bit(gpe_event_info);
/* Perform the action */
switch (action) {
case ACPI_GPE_ENABLE:
ACPI_SET_BIT(gpe_register_info->enable_for_wake,
(u8)register_bit);
break ;
case ACPI_GPE_DISABLE:
ACPI_CLEAR_BIT(gpe_register_info->enable_for_wake,
(u8)register_bit);
break ;
default :
ACPI_ERROR((AE_INFO, "%u, Invalid action" , action));
status = AE_BAD_PARAMETER;
break ;
}
unlock_and_exit:
acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
return_ACPI_STATUS(status);
}
ACPI_EXPORT_SYMBOL(acpi_set_gpe_wake_mask)
/*******************************************************************************
*
* FUNCTION : acpi_clear_gpe
*
* PARAMETERS : gpe_device - Parent GPE Device . NULL for GPE0 / GPE1
* gpe_number - GPE level within the GPE block
*
* RETURN : Status
*
* DESCRIPTION : Clear an ACPI event ( general purpose )
*
******************************************************************************/
acpi_status acpi_clear_gpe(acpi_handle gpe_device, u32 gpe_number)
{
acpi_status status = AE_OK;
struct acpi_gpe_event_info *gpe_event_info;
acpi_cpu_flags flags;
ACPI_FUNCTION_TRACE(acpi_clear_gpe);
flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
/* Ensure that we have a valid GPE number */
gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
if (!gpe_event_info) {
status = AE_BAD_PARAMETER;
goto unlock_and_exit;
}
status = acpi_hw_clear_gpe(gpe_event_info);
unlock_and_exit:
acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
return_ACPI_STATUS(status);
}
ACPI_EXPORT_SYMBOL(acpi_clear_gpe)
/*******************************************************************************
*
* FUNCTION : acpi_get_gpe_status
*
* PARAMETERS : gpe_device - Parent GPE Device . NULL for GPE0 / GPE1
* gpe_number - GPE level within the GPE block
* event_status - Where the current status of the event
* will be returned
*
* RETURN : Status
*
* DESCRIPTION : Get the current status of a GPE ( signalled / not_signalled )
*
******************************************************************************/
acpi_status
acpi_get_gpe_status(acpi_handle gpe_device,
u32 gpe_number, acpi_event_status *event_status)
{
acpi_status status = AE_OK;
struct acpi_gpe_event_info *gpe_event_info;
acpi_cpu_flags flags;
ACPI_FUNCTION_TRACE(acpi_get_gpe_status);
flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
/* Ensure that we have a valid GPE number */
gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
if (!gpe_event_info) {
status = AE_BAD_PARAMETER;
goto unlock_and_exit;
}
/* Obtain status on the requested GPE number */
status = acpi_hw_get_gpe_status(gpe_event_info, event_status);
unlock_and_exit:
acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
return_ACPI_STATUS(status);
}
ACPI_EXPORT_SYMBOL(acpi_get_gpe_status)
/*******************************************************************************
*
* FUNCTION : acpi_gispatch_gpe
*
* PARAMETERS : gpe_device - Parent GPE Device . NULL for GPE0 / GPE1
* gpe_number - GPE level within the GPE block
*
* RETURN : INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
*
* DESCRIPTION : Detect and dispatch a General Purpose Event to either a function
* ( e . g . EC ) or method ( e . g . _ Lxx / _ Exx ) handler .
*
******************************************************************************/
u32 acpi_dispatch_gpe(acpi_handle gpe_device, u32 gpe_number)
{
ACPI_FUNCTION_TRACE(acpi_dispatch_gpe);
return acpi_ev_detect_gpe(gpe_device, NULL, gpe_number);
}
ACPI_EXPORT_SYMBOL(acpi_dispatch_gpe)
/*******************************************************************************
*
* FUNCTION : acpi_finish_gpe
*
* PARAMETERS : gpe_device - Namespace node for the GPE Block
* ( NULL for FADT defined GPEs )
* gpe_number - GPE level within the GPE block
*
* RETURN : Status
*
* DESCRIPTION : Clear and conditionally re - enable a GPE . This completes the GPE
* processing . Intended for use by asynchronous host - installed
* GPE handlers . The GPE is only re - enabled if the enable_for_run bit
* is set in the GPE info .
*
******************************************************************************/
acpi_status acpi_finish_gpe(acpi_handle gpe_device, u32 gpe_number)
{
struct acpi_gpe_event_info *gpe_event_info;
acpi_status status;
acpi_cpu_flags flags;
ACPI_FUNCTION_TRACE(acpi_finish_gpe);
flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
/* Ensure that we have a valid GPE number */
gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
if (!gpe_event_info) {
status = AE_BAD_PARAMETER;
goto unlock_and_exit;
}
status = acpi_ev_finish_gpe(gpe_event_info);
unlock_and_exit:
acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
return_ACPI_STATUS(status);
}
ACPI_EXPORT_SYMBOL(acpi_finish_gpe)
/******************************************************************************
*
* FUNCTION : acpi_disable_all_gpes
*
* PARAMETERS : None
*
* RETURN : Status
*
* DESCRIPTION : Disable and clear all GPEs in all GPE blocks
*
******************************************************************************/
acpi_status acpi_disable_all_gpes(void )
{
acpi_status status;
ACPI_FUNCTION_TRACE(acpi_disable_all_gpes);
status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
status = acpi_hw_disable_all_gpes();
(void )acpi_ut_release_mutex(ACPI_MTX_EVENTS);
return_ACPI_STATUS(status);
}
ACPI_EXPORT_SYMBOL(acpi_disable_all_gpes)
/******************************************************************************
*
* FUNCTION : acpi_enable_all_runtime_gpes
*
* PARAMETERS : None
*
* RETURN : Status
*
* DESCRIPTION : Enable all " runtime " GPEs , in all GPE blocks
*
******************************************************************************/
acpi_status acpi_enable_all_runtime_gpes(void )
{
acpi_status status;
ACPI_FUNCTION_TRACE(acpi_enable_all_runtime_gpes);
status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
status = acpi_hw_enable_all_runtime_gpes();
(void )acpi_ut_release_mutex(ACPI_MTX_EVENTS);
return_ACPI_STATUS(status);
}
ACPI_EXPORT_SYMBOL(acpi_enable_all_runtime_gpes)
/******************************************************************************
*
* FUNCTION : acpi_enable_all_wakeup_gpes
*
* PARAMETERS : None
*
* RETURN : Status
*
* DESCRIPTION : Enable all " wakeup " GPEs and disable all of the other GPEs , in
* all GPE blocks .
*
******************************************************************************/
acpi_status acpi_enable_all_wakeup_gpes(void )
{
acpi_status status;
ACPI_FUNCTION_TRACE(acpi_enable_all_wakeup_gpes);
status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
status = acpi_hw_enable_all_wakeup_gpes();
(void )acpi_ut_release_mutex(ACPI_MTX_EVENTS);
return_ACPI_STATUS(status);
}
ACPI_EXPORT_SYMBOL(acpi_enable_all_wakeup_gpes)
/******************************************************************************
*
* FUNCTION : acpi_any_gpe_status_set
*
* PARAMETERS : gpe_skip_number - Number of the GPE to skip
*
* RETURN : Whether or not the status bit is set for any GPE
*
* DESCRIPTION : Check the status bits of all enabled GPEs , except for the one
* represented by the " skip " argument , and return TRUE if any of
* them is set or FALSE otherwise .
*
******************************************************************************/
u32 acpi_any_gpe_status_set(u32 gpe_skip_number)
{
acpi_status status;
acpi_handle gpe_device;
u8 ret;
ACPI_FUNCTION_TRACE(acpi_any_gpe_status_set);
status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
if (ACPI_FAILURE(status)) {
return (FALSE );
}
status = acpi_get_gpe_device(gpe_skip_number, &gpe_device);
if (ACPI_FAILURE(status)) {
gpe_device = NULL;
}
ret = acpi_hw_check_all_gpes(gpe_device, gpe_skip_number);
(void )acpi_ut_release_mutex(ACPI_MTX_EVENTS);
return (ret);
}
ACPI_EXPORT_SYMBOL(acpi_any_gpe_status_set)
/*******************************************************************************
*
* FUNCTION : acpi_install_gpe_block
*
* PARAMETERS : gpe_device - Handle to the parent GPE Block Device
* gpe_block_address - Address and space_ID
* register_count - Number of GPE register pairs in the block
* interrupt_number - H / W interrupt for the block
*
* RETURN : Status
*
* DESCRIPTION : Create and Install a block of GPE registers . The GPEs are not
* enabled here .
*
******************************************************************************/
acpi_status
acpi_install_gpe_block(acpi_handle gpe_device,
struct acpi_generic_address *gpe_block_address,
u32 register_count, u32 interrupt_number)
{
acpi_status status;
union acpi_operand_object *obj_desc;
struct acpi_namespace_node *node;
struct acpi_gpe_block_info *gpe_block;
ACPI_FUNCTION_TRACE(acpi_install_gpe_block);
if ((!gpe_device) || (!gpe_block_address) || (!register_count)) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
node = acpi_ns_validate_handle(gpe_device);
if (!node) {
status = AE_BAD_PARAMETER;
goto unlock_and_exit;
}
/* Validate the parent device */
if (node->type != ACPI_TYPE_DEVICE) {
status = AE_TYPE;
goto unlock_and_exit;
}
if (node->object) {
status = AE_ALREADY_EXISTS;
goto unlock_and_exit;
}
/*
* For user - installed GPE Block Devices , the gpe_block_base_number
* is always zero
*/
status = acpi_ev_create_gpe_block(node, gpe_block_address->address,
gpe_block_address->space_id,
register_count, 0 , interrupt_number,
&gpe_block);
if (ACPI_FAILURE(status)) {
goto unlock_and_exit;
}
/* Install block in the device_object attached to the node */
obj_desc = acpi_ns_get_attached_object(node);
if (!obj_desc) {
/*
* No object , create a new one ( Device nodes do not always have
* an attached object )
*/
obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_DEVICE);
if (!obj_desc) {
status = AE_NO_MEMORY;
goto unlock_and_exit;
}
status =
acpi_ns_attach_object(node, obj_desc, ACPI_TYPE_DEVICE);
/* Remove local reference to the object */
acpi_ut_remove_reference(obj_desc);
if (ACPI_FAILURE(status)) {
goto unlock_and_exit;
}
}
/* Now install the GPE block in the device_object */
obj_desc->device.gpe_block = gpe_block;
unlock_and_exit:
(void )acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
return_ACPI_STATUS(status);
}
ACPI_EXPORT_SYMBOL(acpi_install_gpe_block)
/*******************************************************************************
*
* FUNCTION : acpi_remove_gpe_block
*
* PARAMETERS : gpe_device - Handle to the parent GPE Block Device
*
* RETURN : Status
*
* DESCRIPTION : Remove a previously installed block of GPE registers
*
******************************************************************************/
acpi_status acpi_remove_gpe_block(acpi_handle gpe_device)
{
union acpi_operand_object *obj_desc;
acpi_status status;
struct acpi_namespace_node *node;
ACPI_FUNCTION_TRACE(acpi_remove_gpe_block);
if (!gpe_device) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
node = acpi_ns_validate_handle(gpe_device);
if (!node) {
status = AE_BAD_PARAMETER;
goto unlock_and_exit;
}
/* Validate the parent device */
if (node->type != ACPI_TYPE_DEVICE) {
status = AE_TYPE;
goto unlock_and_exit;
}
/* Get the device_object attached to the node */
obj_desc = acpi_ns_get_attached_object(node);
if (!obj_desc || !obj_desc->device.gpe_block) {
return_ACPI_STATUS(AE_NULL_OBJECT);
}
/* Delete the GPE block (but not the device_object) */
status = acpi_ev_delete_gpe_block(obj_desc->device.gpe_block);
if (ACPI_SUCCESS(status)) {
obj_desc->device.gpe_block = NULL;
}
unlock_and_exit:
(void )acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
return_ACPI_STATUS(status);
}
ACPI_EXPORT_SYMBOL(acpi_remove_gpe_block)
/*******************************************************************************
*
* FUNCTION : acpi_get_gpe_device
*
* PARAMETERS : index - System GPE index ( 0 - current_gpe_count )
* gpe_device - Where the parent GPE Device is returned
*
* RETURN : Status
*
* DESCRIPTION : Obtain the GPE device associated with the input index . A NULL
* gpe device indicates that the gpe number is contained in one of
* the FADT - defined gpe blocks . Otherwise , the GPE block device .
*
******************************************************************************/
acpi_status acpi_get_gpe_device(u32 index, acpi_handle *gpe_device)
{
struct acpi_gpe_device_info info;
acpi_status status;
ACPI_FUNCTION_TRACE(acpi_get_gpe_device);
if (!gpe_device) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
if (index >= acpi_current_gpe_count) {
return_ACPI_STATUS(AE_NOT_EXIST);
}
/* Setup and walk the GPE list */
info.index = index;
info.status = AE_NOT_EXIST;
info.gpe_device = NULL;
info.next_block_base_index = 0 ;
status = acpi_ev_walk_gpe_list(acpi_ev_get_gpe_device, &info);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
*gpe_device = ACPI_CAST_PTR(acpi_handle, info.gpe_device);
return_ACPI_STATUS(info.status);
}
ACPI_EXPORT_SYMBOL(acpi_get_gpe_device)
#endif /* !ACPI_REDUCED_HARDWARE */
Messung V0.5 in Prozent C=96 H=95 G=95
¤ Dauer der Verarbeitung: 0.42 Sekunden
(vorverarbeitet am 2026-10-11)
¤
*© Formatika GbR, Deutschland
2026-10-11
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