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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /drivers/acpi/acpica/evxfgpe.c
Initial import
Diffstat (limited to 'drivers/acpi/acpica/evxfgpe.c')
-rw-r--r--drivers/acpi/acpica/evxfgpe.c952
1 files changed, 952 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/evxfgpe.c b/drivers/acpi/acpica/evxfgpe.c
new file mode 100644
index 000000000..70eb47e3d
--- /dev/null
+++ b/drivers/acpi/acpica/evxfgpe.c
@@ -0,0 +1,952 @@
+/******************************************************************************
+ *
+ * Module Name: evxfgpe - External Interfaces for General Purpose Events (GPEs)
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2015, 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.
+ */
+
+#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;
+
+ 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, NULL);
+ if (ACPI_SUCCESS(status)) {
+ acpi_gbl_all_gpes_initialized = TRUE;
+ }
+
+unlock_and_exit:
+ (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
+
+ 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);
+ } 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);
+ break;
+
+ case ACPI_GPE_DISABLE:
+
+ status = acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_DISABLE);
+ 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_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);
+ }
+
+ /*
+ * 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_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 reenable a GPE. This completes the GPE
+ * processing. Intended for use by asynchronous host-installed
+ * GPE handlers. The GPE is only reenabled 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_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 */