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path: root/drivers/acpi/acpica/evxfevnt.c
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Diffstat (limited to 'drivers/acpi/acpica/evxfevnt.c')
-rw-r--r--drivers/acpi/acpica/evxfevnt.c871
1 files changed, 871 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/evxfevnt.c b/drivers/acpi/acpica/evxfevnt.c
new file mode 100644
index 000000000000..35485e4b60a6
--- /dev/null
+++ b/drivers/acpi/acpica/evxfevnt.c
@@ -0,0 +1,871 @@
+/******************************************************************************
+ *
+ * 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 */
+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_set_register(acpi_gbl_fixed_event_info[event].
+ enable_register_id, 1);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+
+ /* Make sure that the hardware responded */
+
+ status =
+ acpi_get_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_type
+ *
+ * PARAMETERS: gpe_device - Parent GPE Device
+ * gpe_number - GPE level within the GPE block
+ * Type - New GPE type
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Set the type of an individual GPE
+ *
+ ******************************************************************************/
+acpi_status acpi_set_gpe_type(acpi_handle gpe_device, u32 gpe_number, u8 type)
+{
+ acpi_status status = AE_OK;
+ struct acpi_gpe_event_info *gpe_event_info;
+
+ ACPI_FUNCTION_TRACE(acpi_set_gpe_type);
+
+ /* 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 ((gpe_event_info->flags & ACPI_GPE_TYPE_MASK) == type) {
+ return_ACPI_STATUS(AE_OK);
+ }
+
+ /* Set the new type (will disable GPE if currently enabled) */
+
+ status = acpi_ev_set_gpe_type(gpe_event_info, type);
+
+ unlock_and_exit:
+ return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_set_gpe_type)
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_enable_gpe
+ *
+ * PARAMETERS: gpe_device - Parent GPE Device
+ * gpe_number - GPE level within the GPE block
+ * Flags - Just enable, or also wake enable?
+ * Called from ISR or not
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Enable an ACPI event (general purpose)
+ *
+ ******************************************************************************/
+acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number)
+{
+ 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;
+ }
+
+ /* Perform the enable */
+
+ status = acpi_ev_enable_gpe(gpe_event_info, TRUE);
+
+ 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
+ * Flags - Just disable, or also wake disable?
+ * Called from ISR or not
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Disable an ACPI event (general purpose)
+ *
+ ******************************************************************************/
+acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number)
+{
+ 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;
+ }
+
+ status = acpi_ev_disable_gpe(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_set_register(acpi_gbl_fixed_event_info[event].
+ enable_register_id, 0);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+
+ status =
+ acpi_get_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_set_register(acpi_gbl_fixed_event_info[event].
+ status_register_id, 1);
+
+ 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_get_register(acpi_gbl_fixed_event_info[event].
+ enable_register_id, &value);
+ if (ACPI_FAILURE(status))
+ return_ACPI_STATUS(status);
+
+ *event_status = value;
+
+ status =
+ acpi_get_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_map_handle_to_node(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_map_handle_to_node(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.
+ *
+ ******************************************************************************/
+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);
+}