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- // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
- /******************************************************************************
- *
- * Module Name: evxfgpe - External Interfaces for General Purpose Events (GPEs)
- *
- * Copyright (C) 2000 - 2022, 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 */
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