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9630bdd9b1
linux_dsm_epyc7002/drivers/acpi/acpica/evxfevnt.c
Rafael J. Wysocki 9630bdd9b1 ACPI: Use GPE reference counting to support shared GPEs 
ACPI GPEs may map to multiple devices.  The current GPE interface
only provides a mechanism for enabling and disabling GPEs, making
it difficult to change the state of GPEs at runtime without extensive
cooperation between devices.

Add an API to allow devices to indicate whether or not they want
their device's GPE to be enabled for both runtime and wakeup events.

Remove the old GPE type handling entirely, which gets rid of various
quirks, like the implicit disabling with GPE type setting. This
requires a small amount of rework in order to ensure that non-wake
GPEs are enabled by default to preserve existing behaviour.

Based on patches from Matthew Garrett <mjg@redhat.com>.

Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2010-02-22 16:20:45 -08:00

912 lines
24 KiB
C
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/******************************************************************************
*
* Module Name: evxfevnt - External Interfaces, ACPI event disable/enable
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2008, Intel Corp.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*/
#include <acpi/acpi.h>
#include "accommon.h"
#include "acevents.h"
#include "acnamesp.h"
#include "actables.h"
#define _COMPONENT ACPI_EVENTS
ACPI_MODULE_NAME("evxfevnt")
/* Local prototypes */
static acpi_status
acpi_ev_get_gpe_device(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
struct acpi_gpe_block_info *gpe_block, void *context);
/*******************************************************************************
*
* FUNCTION: acpi_enable
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Transfers the system into ACPI mode.
*
******************************************************************************/
acpi_status acpi_enable(void)
{
acpi_status status = AE_OK;
ACPI_FUNCTION_TRACE(acpi_enable);
/* ACPI tables must be present */
if (!acpi_tb_tables_loaded()) {
return_ACPI_STATUS(AE_NO_ACPI_TABLES);
}
/* Check current mode */
if (acpi_hw_get_mode() == ACPI_SYS_MODE_ACPI) {
ACPI_DEBUG_PRINT((ACPI_DB_INIT,
"System is already in ACPI mode\n"));
} else {
/* Transition to ACPI mode */
status = acpi_hw_set_mode(ACPI_SYS_MODE_ACPI);
if (ACPI_FAILURE(status)) {
ACPI_ERROR((AE_INFO,
"Could not transition to ACPI mode"));
return_ACPI_STATUS(status);
}
ACPI_DEBUG_PRINT((ACPI_DB_INIT,
"Transition to ACPI mode successful\n"));
}
return_ACPI_STATUS(status);
}
ACPI_EXPORT_SYMBOL(acpi_enable)
/*******************************************************************************
*
* FUNCTION: acpi_disable
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Transfers the system into LEGACY (non-ACPI) mode.
*
******************************************************************************/
acpi_status acpi_disable(void)
{
acpi_status status = AE_OK;
ACPI_FUNCTION_TRACE(acpi_disable);
if (acpi_hw_get_mode() == ACPI_SYS_MODE_LEGACY) {
ACPI_DEBUG_PRINT((ACPI_DB_INIT,
"System is already in legacy (non-ACPI) mode\n"));
} else {
/* Transition to LEGACY mode */
status = acpi_hw_set_mode(ACPI_SYS_MODE_LEGACY);
if (ACPI_FAILURE(status)) {
ACPI_ERROR((AE_INFO,
"Could not exit ACPI mode to legacy mode"));
return_ACPI_STATUS(status);
}
ACPI_DEBUG_PRINT((ACPI_DB_INIT, "ACPI mode disabled\n"));
}
return_ACPI_STATUS(status);
}
ACPI_EXPORT_SYMBOL(acpi_disable)
/*******************************************************************************
*
* FUNCTION: acpi_enable_event
*
* PARAMETERS: Event - The fixed eventto be enabled
* Flags - Reserved
*
* RETURN: Status
*
* DESCRIPTION: Enable an ACPI event (fixed)
*
******************************************************************************/
acpi_status acpi_enable_event(u32 event, u32 flags)
{
acpi_status status = AE_OK;
u32 value;
ACPI_FUNCTION_TRACE(acpi_enable_event);
/* Decode the Fixed Event */
if (event > ACPI_EVENT_MAX) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
/*
* Enable the requested fixed event (by writing a one to the enable
* register bit)
*/
status =
acpi_write_bit_register(acpi_gbl_fixed_event_info[event].
enable_register_id, ACPI_ENABLE_EVENT);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/* Make sure that the hardware responded */
status =
acpi_read_bit_register(acpi_gbl_fixed_event_info[event].
enable_register_id, &value);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
if (value != 1) {
ACPI_ERROR((AE_INFO,
"Could not enable %s event",
acpi_ut_get_event_name(event)));
return_ACPI_STATUS(AE_NO_HARDWARE_RESPONSE);
}
return_ACPI_STATUS(status);
}
ACPI_EXPORT_SYMBOL(acpi_enable_event)
/*******************************************************************************
*
* FUNCTION: acpi_set_gpe
*
* PARAMETERS: gpe_device - Parent GPE Device
* gpe_number - GPE level within the GPE block
* action - Enable or disable
* Called from ISR or not
*
* RETURN: Status
*
* DESCRIPTION: Enable or disable an ACPI event (general purpose)
*
******************************************************************************/
acpi_status acpi_set_gpe(acpi_handle gpe_device, u32 gpe_number, u8 action)
{
acpi_status status = AE_OK;
acpi_cpu_flags flags;
struct acpi_gpe_event_info *gpe_event_info;
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_ev_enable_gpe(gpe_event_info, TRUE);
break;
case ACPI_GPE_DISABLE:
status = acpi_ev_disable_gpe(gpe_event_info);
break;
default:
ACPI_ERROR((AE_INFO, "Invalid action\n"));
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_enable_gpe
*
* PARAMETERS: gpe_device - Parent GPE Device
* gpe_number - GPE level within the GPE block
* type - Purpose the GPE will be used for
*
* RETURN: Status
*
* DESCRIPTION: Take a reference to a GPE and enable it if necessary
*
******************************************************************************/
acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number, u8 type)
{
acpi_status status = AE_OK;
acpi_cpu_flags flags;
struct acpi_gpe_event_info *gpe_event_info;
ACPI_FUNCTION_TRACE(acpi_enable_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;
}
if (type & ACPI_GPE_TYPE_RUNTIME) {
if (++gpe_event_info->runtime_count == 1)
status = acpi_ev_enable_gpe(gpe_event_info, TRUE);
if (ACPI_FAILURE(status))
gpe_event_info->runtime_count--;
}
if (type & ACPI_GPE_TYPE_WAKE) {
if (!(gpe_event_info->flags & ACPI_GPE_CAN_WAKE)) {
status = AE_BAD_PARAMETER;
goto unlock_and_exit;
}
/*
* Wake-up GPEs are only enabled right prior to putting the
* system into a sleep state.
*/
if (++gpe_event_info->wakeup_count == 1)
acpi_ev_update_gpe_enable_masks(gpe_event_info);
}
unlock_and_exit:
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
* gpe_number - GPE level within the GPE block
* type - Purpose the GPE won't be used for any more
*
* RETURN: Status
*
* DESCRIPTION: Release a reference to a GPE and disable it if necessary
*
******************************************************************************/
acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number, u8 type)
{
acpi_status status = AE_OK;
acpi_cpu_flags flags;
struct acpi_gpe_event_info *gpe_event_info;
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 = AE_BAD_PARAMETER;
goto unlock_and_exit;
}
if ((type & ACPI_GPE_TYPE_WAKE) && gpe_event_info->runtime_count) {
if (--gpe_event_info->runtime_count == 0)
acpi_ev_disable_gpe(gpe_event_info);
}
if ((type & ACPI_GPE_TYPE_RUNTIME) && gpe_event_info->wakeup_count) {
/*
* Wake-up GPEs are not enabled after leaving system sleep
* states, so we don't need to disable them here.
*/
if (--gpe_event_info->wakeup_count == 0)
acpi_ev_update_gpe_enable_masks(gpe_event_info);
}
unlock_and_exit:
acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
return_ACPI_STATUS(status);
}
ACPI_EXPORT_SYMBOL(acpi_disable_gpe)
/*******************************************************************************
*
* FUNCTION: acpi_disable_event
*
* PARAMETERS: Event - The fixed eventto be enabled
* Flags - Reserved
*
* RETURN: Status
*
* DESCRIPTION: Disable an ACPI event (fixed)
*
******************************************************************************/
acpi_status acpi_disable_event(u32 event, u32 flags)
{
acpi_status status = AE_OK;
u32 value;
ACPI_FUNCTION_TRACE(acpi_disable_event);
/* Decode the Fixed Event */
if (event > ACPI_EVENT_MAX) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
/*
* Disable the requested fixed event (by writing a zero to the enable
* register bit)
*/
status =
acpi_write_bit_register(acpi_gbl_fixed_event_info[event].
enable_register_id, ACPI_DISABLE_EVENT);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
status =
acpi_read_bit_register(acpi_gbl_fixed_event_info[event].
enable_register_id, &value);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
if (value != 0) {
ACPI_ERROR((AE_INFO,
"Could not disable %s events",
acpi_ut_get_event_name(event)));
return_ACPI_STATUS(AE_NO_HARDWARE_RESPONSE);
}
return_ACPI_STATUS(status);
}
ACPI_EXPORT_SYMBOL(acpi_disable_event)
/*******************************************************************************
*
* FUNCTION: acpi_clear_event
*
* PARAMETERS: Event - The fixed event to be cleared
*
* RETURN: Status
*
* DESCRIPTION: Clear an ACPI event (fixed)
*
******************************************************************************/
acpi_status acpi_clear_event(u32 event)
{
acpi_status status = AE_OK;
ACPI_FUNCTION_TRACE(acpi_clear_event);
/* Decode the Fixed Event */
if (event > ACPI_EVENT_MAX) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
/*
* Clear the requested fixed event (By writing a one to the status
* register bit)
*/
status =
acpi_write_bit_register(acpi_gbl_fixed_event_info[event].
status_register_id, ACPI_CLEAR_STATUS);
return_ACPI_STATUS(status);
}
ACPI_EXPORT_SYMBOL(acpi_clear_event)
/*******************************************************************************
*
* FUNCTION: acpi_clear_gpe
*
* PARAMETERS: gpe_device - Parent GPE Device
* gpe_number - GPE level within the GPE block
* Flags - Called from an ISR or not
*
* RETURN: Status
*
* DESCRIPTION: Clear an ACPI event (general purpose)
*
******************************************************************************/
acpi_status acpi_clear_gpe(acpi_handle gpe_device, u32 gpe_number, u32 flags)
{
acpi_status status = AE_OK;
struct acpi_gpe_event_info *gpe_event_info;
ACPI_FUNCTION_TRACE(acpi_clear_gpe);
/* Use semaphore lock if not executing at interrupt level */
if (flags & ACPI_NOT_ISR) {
status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
}
/* 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:
if (flags & ACPI_NOT_ISR) {
(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
}
return_ACPI_STATUS(status);
}
ACPI_EXPORT_SYMBOL(acpi_clear_gpe)
/*******************************************************************************
*
* FUNCTION: acpi_get_event_status
*
* PARAMETERS: Event - The fixed event
* event_status - Where the current status of the event will
* be returned
*
* RETURN: Status
*
* DESCRIPTION: Obtains and returns the current status of the event
*
******************************************************************************/
acpi_status acpi_get_event_status(u32 event, acpi_event_status * event_status)
{
acpi_status status = AE_OK;
u32 value;
ACPI_FUNCTION_TRACE(acpi_get_event_status);
if (!event_status) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
/* Decode the Fixed Event */
if (event > ACPI_EVENT_MAX) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
/* Get the status of the requested fixed event */
status =
acpi_read_bit_register(acpi_gbl_fixed_event_info[event].
enable_register_id, &value);
if (ACPI_FAILURE(status))
return_ACPI_STATUS(status);
*event_status = value;
status =
acpi_read_bit_register(acpi_gbl_fixed_event_info[event].
status_register_id, &value);
if (ACPI_FAILURE(status))
return_ACPI_STATUS(status);
if (value)
*event_status |= ACPI_EVENT_FLAG_SET;
if (acpi_gbl_fixed_event_handlers[event].handler)
*event_status |= ACPI_EVENT_FLAG_HANDLE;
return_ACPI_STATUS(status);
}
ACPI_EXPORT_SYMBOL(acpi_get_event_status)
/*******************************************************************************
*
* FUNCTION: acpi_get_gpe_status
*
* PARAMETERS: gpe_device - Parent GPE Device
* gpe_number - GPE level within the GPE block
* Flags - Called from an ISR or not
* event_status - Where the current status of the event will
* be returned
*
* RETURN: Status
*
* DESCRIPTION: Get status of an event (general purpose)
*
******************************************************************************/
acpi_status
acpi_get_gpe_status(acpi_handle gpe_device,
u32 gpe_number, u32 flags, acpi_event_status * event_status)
{
acpi_status status = AE_OK;
struct acpi_gpe_event_info *gpe_event_info;
ACPI_FUNCTION_TRACE(acpi_get_gpe_status);
/* Use semaphore lock if not executing at interrupt level */
if (flags & ACPI_NOT_ISR) {
status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
}
/* 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);
if (gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK)
*event_status |= ACPI_EVENT_FLAG_HANDLE;
unlock_and_exit:
if (flags & ACPI_NOT_ISR) {
(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
}
return_ACPI_STATUS(status);
}
ACPI_EXPORT_SYMBOL(acpi_get_gpe_status)
/*******************************************************************************
*
* 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
*
******************************************************************************/
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 (status);
}
node = acpi_ns_validate_handle(gpe_device);
if (!node) {
status = AE_BAD_PARAMETER;
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, register_count, 0,
interrupt_number, &gpe_block);
if (ACPI_FAILURE(status)) {
goto unlock_and_exit;
}
/* Run the _PRW methods and enable the GPEs */
status = acpi_ev_initialize_gpe_block(node, gpe_block);
if (ACPI_FAILURE(status)) {
goto unlock_and_exit;
}
/* Get the device_object attached to the node */
obj_desc = acpi_ns_get_attached_object(node);
if (!obj_desc) {
/* No object, create a new one */
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;
}
}
/* 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 (status);
}
node = acpi_ns_validate_handle(gpe_device);
if (!node) {
status = AE_BAD_PARAMETER;
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 = info.gpe_device;
return_ACPI_STATUS(info.status);
}
ACPI_EXPORT_SYMBOL(acpi_get_gpe_device)
/*******************************************************************************
*
* FUNCTION: acpi_ev_get_gpe_device
*
* PARAMETERS: GPE_WALK_CALLBACK
*
* RETURN: Status
*
* DESCRIPTION: Matches the input GPE index (0-current_gpe_count) with a GPE
* block device. NULL if the GPE is one of the FADT-defined GPEs.
*
******************************************************************************/
static acpi_status
acpi_ev_get_gpe_device(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
struct acpi_gpe_block_info *gpe_block, void *context)
{
struct acpi_gpe_device_info *info = context;
/* Increment Index by the number of GPEs in this block */
info->next_block_base_index +=
(gpe_block->register_count * ACPI_GPE_REGISTER_WIDTH);
if (info->index < info->next_block_base_index) {
/*
* The GPE index is within this block, get the node. Leave the node
* NULL for the FADT-defined GPEs
*/
if ((gpe_block->node)->type == ACPI_TYPE_DEVICE) {
info->gpe_device = gpe_block->node;
}
info->status = AE_OK;
return (AE_CTRL_END);
}
return (AE_OK);
}
/******************************************************************************
*
* 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);
}
/******************************************************************************
*
* 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);
}
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