1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
835 lines
22 KiB
C
835 lines
22 KiB
C
/******************************************************************************
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*
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* Module Name: evxface - External interfaces for ACPI events
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2005, R. Byron Moore
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <linux/module.h>
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#include <acpi/acpi.h>
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#include <acpi/acnamesp.h>
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#include <acpi/acevents.h>
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#include <acpi/acinterp.h>
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#define _COMPONENT ACPI_EVENTS
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ACPI_MODULE_NAME ("evxface")
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/*******************************************************************************
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*
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* FUNCTION: acpi_install_exception_handler
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*
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* PARAMETERS: Handler - Pointer to the handler function for the
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* event
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*
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* RETURN: Status
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*
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* DESCRIPTION: Saves the pointer to the handler function
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*
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******************************************************************************/
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#ifdef ACPI_FUTURE_USAGE
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acpi_status
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acpi_install_exception_handler (
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acpi_exception_handler handler)
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{
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acpi_status status;
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ACPI_FUNCTION_TRACE ("acpi_install_exception_handler");
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status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS);
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if (ACPI_FAILURE (status)) {
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return_ACPI_STATUS (status);
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}
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/* Don't allow two handlers. */
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if (acpi_gbl_exception_handler) {
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status = AE_ALREADY_EXISTS;
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goto cleanup;
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}
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/* Install the handler */
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acpi_gbl_exception_handler = handler;
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cleanup:
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(void) acpi_ut_release_mutex (ACPI_MTX_EVENTS);
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return_ACPI_STATUS (status);
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}
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#endif /* ACPI_FUTURE_USAGE */
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/*******************************************************************************
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*
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* FUNCTION: acpi_install_fixed_event_handler
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*
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* PARAMETERS: Event - Event type to enable.
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* Handler - Pointer to the handler function for the
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* event
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* Context - Value passed to the handler on each GPE
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*
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* RETURN: Status
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*
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* DESCRIPTION: Saves the pointer to the handler function and then enables the
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* event.
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*
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******************************************************************************/
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acpi_status
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acpi_install_fixed_event_handler (
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u32 event,
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acpi_event_handler handler,
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void *context)
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{
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acpi_status status;
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ACPI_FUNCTION_TRACE ("acpi_install_fixed_event_handler");
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/* Parameter validation */
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if (event > ACPI_EVENT_MAX) {
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS);
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if (ACPI_FAILURE (status)) {
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return_ACPI_STATUS (status);
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}
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/* Don't allow two handlers. */
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if (NULL != acpi_gbl_fixed_event_handlers[event].handler) {
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status = AE_ALREADY_EXISTS;
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goto cleanup;
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}
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/* Install the handler before enabling the event */
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acpi_gbl_fixed_event_handlers[event].handler = handler;
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acpi_gbl_fixed_event_handlers[event].context = context;
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status = acpi_clear_event (event);
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if (ACPI_SUCCESS(status))
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status = acpi_enable_event (event, 0);
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if (ACPI_FAILURE (status)) {
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ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "Could not enable fixed event.\n"));
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/* Remove the handler */
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acpi_gbl_fixed_event_handlers[event].handler = NULL;
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acpi_gbl_fixed_event_handlers[event].context = NULL;
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}
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else {
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ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
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"Enabled fixed event %X, Handler=%p\n", event, handler));
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}
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cleanup:
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(void) acpi_ut_release_mutex (ACPI_MTX_EVENTS);
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return_ACPI_STATUS (status);
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}
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EXPORT_SYMBOL(acpi_install_fixed_event_handler);
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/*******************************************************************************
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*
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* FUNCTION: acpi_remove_fixed_event_handler
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*
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* PARAMETERS: Event - Event type to disable.
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* Handler - Address of the handler
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*
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* RETURN: Status
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*
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* DESCRIPTION: Disables the event and unregisters the event handler.
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*
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******************************************************************************/
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acpi_status
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acpi_remove_fixed_event_handler (
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u32 event,
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acpi_event_handler handler)
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{
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acpi_status status = AE_OK;
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ACPI_FUNCTION_TRACE ("acpi_remove_fixed_event_handler");
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/* Parameter validation */
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if (event > ACPI_EVENT_MAX) {
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS);
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if (ACPI_FAILURE (status)) {
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return_ACPI_STATUS (status);
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}
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/* Disable the event before removing the handler */
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status = acpi_disable_event (event, 0);
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/* Always Remove the handler */
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acpi_gbl_fixed_event_handlers[event].handler = NULL;
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acpi_gbl_fixed_event_handlers[event].context = NULL;
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if (ACPI_FAILURE (status)) {
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ACPI_DEBUG_PRINT ((ACPI_DB_WARN,
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"Could not write to fixed event enable register.\n"));
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}
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else {
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ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Disabled fixed event %X.\n", event));
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}
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(void) acpi_ut_release_mutex (ACPI_MTX_EVENTS);
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return_ACPI_STATUS (status);
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}
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EXPORT_SYMBOL(acpi_remove_fixed_event_handler);
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/*******************************************************************************
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*
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* FUNCTION: acpi_install_notify_handler
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*
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* PARAMETERS: Device - The device for which notifies will be handled
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* handler_type - The type of handler:
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* ACPI_SYSTEM_NOTIFY: system_handler (00-7f)
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* ACPI_DEVICE_NOTIFY: driver_handler (80-ff)
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* ACPI_ALL_NOTIFY: both system and device
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* Handler - Address of the handler
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* Context - Value passed to the handler on each GPE
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*
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* RETURN: Status
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*
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* DESCRIPTION: Install a handler for notifies on an ACPI device
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*
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******************************************************************************/
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acpi_status
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acpi_install_notify_handler (
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acpi_handle device,
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u32 handler_type,
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acpi_notify_handler handler,
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void *context)
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{
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union acpi_operand_object *obj_desc;
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union acpi_operand_object *notify_obj;
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struct acpi_namespace_node *node;
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acpi_status status;
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ACPI_FUNCTION_TRACE ("acpi_install_notify_handler");
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/* Parameter validation */
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if ((!device) ||
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(!handler) ||
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(handler_type > ACPI_MAX_NOTIFY_HANDLER_TYPE)) {
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE (status)) {
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return_ACPI_STATUS (status);
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}
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/* Convert and validate the device handle */
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node = acpi_ns_map_handle_to_node (device);
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if (!node) {
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status = AE_BAD_PARAMETER;
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goto unlock_and_exit;
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}
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/*
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* Root Object:
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* Registering a notify handler on the root object indicates that the
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* caller wishes to receive notifications for all objects. Note that
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* only one <external> global handler can be regsitered (per notify type).
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*/
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if (device == ACPI_ROOT_OBJECT) {
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/* Make sure the handler is not already installed */
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if (((handler_type & ACPI_SYSTEM_NOTIFY) &&
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acpi_gbl_system_notify.handler) ||
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((handler_type & ACPI_DEVICE_NOTIFY) &&
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acpi_gbl_device_notify.handler)) {
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status = AE_ALREADY_EXISTS;
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goto unlock_and_exit;
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}
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if (handler_type & ACPI_SYSTEM_NOTIFY) {
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acpi_gbl_system_notify.node = node;
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acpi_gbl_system_notify.handler = handler;
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acpi_gbl_system_notify.context = context;
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}
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if (handler_type & ACPI_DEVICE_NOTIFY) {
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acpi_gbl_device_notify.node = node;
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acpi_gbl_device_notify.handler = handler;
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acpi_gbl_device_notify.context = context;
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}
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/* Global notify handler installed */
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}
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/*
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* All Other Objects:
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* Caller will only receive notifications specific to the target object.
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* Note that only certain object types can receive notifications.
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*/
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else {
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/* Notifies allowed on this object? */
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if (!acpi_ev_is_notify_object (node)) {
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status = AE_TYPE;
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goto unlock_and_exit;
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}
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/* Check for an existing internal object */
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obj_desc = acpi_ns_get_attached_object (node);
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if (obj_desc) {
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/* Object exists - make sure there's no handler */
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if (((handler_type & ACPI_SYSTEM_NOTIFY) &&
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obj_desc->common_notify.system_notify) ||
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((handler_type & ACPI_DEVICE_NOTIFY) &&
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obj_desc->common_notify.device_notify)) {
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status = AE_ALREADY_EXISTS;
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goto unlock_and_exit;
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}
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}
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else {
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/* Create a new object */
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|
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obj_desc = acpi_ut_create_internal_object (node->type);
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if (!obj_desc) {
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status = AE_NO_MEMORY;
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goto unlock_and_exit;
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}
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|
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/* Attach new object to the Node */
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status = acpi_ns_attach_object (device, obj_desc, node->type);
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|
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/* Remove local reference to the object */
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acpi_ut_remove_reference (obj_desc);
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if (ACPI_FAILURE (status)) {
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goto unlock_and_exit;
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}
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}
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|
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/* Install the handler */
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|
|
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notify_obj = acpi_ut_create_internal_object (ACPI_TYPE_LOCAL_NOTIFY);
|
|
if (!notify_obj) {
|
|
status = AE_NO_MEMORY;
|
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goto unlock_and_exit;
|
|
}
|
|
|
|
notify_obj->notify.node = node;
|
|
notify_obj->notify.handler = handler;
|
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notify_obj->notify.context = context;
|
|
|
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if (handler_type & ACPI_SYSTEM_NOTIFY) {
|
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obj_desc->common_notify.system_notify = notify_obj;
|
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}
|
|
|
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if (handler_type & ACPI_DEVICE_NOTIFY) {
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obj_desc->common_notify.device_notify = notify_obj;
|
|
}
|
|
|
|
if (handler_type == ACPI_ALL_NOTIFY) {
|
|
/* Extra ref if installed in both */
|
|
|
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acpi_ut_add_reference (notify_obj);
|
|
}
|
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}
|
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|
|
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unlock_and_exit:
|
|
(void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
EXPORT_SYMBOL(acpi_install_notify_handler);
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|
|
|
|
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/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_remove_notify_handler
|
|
*
|
|
* PARAMETERS: Device - The device for which notifies will be handled
|
|
* handler_type - The type of handler:
|
|
* ACPI_SYSTEM_NOTIFY: system_handler (00-7f)
|
|
* ACPI_DEVICE_NOTIFY: driver_handler (80-ff)
|
|
* ACPI_ALL_NOTIFY: both system and device
|
|
* Handler - Address of the handler
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Remove a handler for notifies on an ACPI device
|
|
*
|
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******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_remove_notify_handler (
|
|
acpi_handle device,
|
|
u32 handler_type,
|
|
acpi_notify_handler handler)
|
|
{
|
|
union acpi_operand_object *notify_obj;
|
|
union acpi_operand_object *obj_desc;
|
|
struct acpi_namespace_node *node;
|
|
acpi_status status;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE ("acpi_remove_notify_handler");
|
|
|
|
|
|
/* Parameter validation */
|
|
|
|
if ((!device) ||
|
|
(!handler) ||
|
|
(handler_type > ACPI_MAX_NOTIFY_HANDLER_TYPE)) {
|
|
return_ACPI_STATUS (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
|
|
if (ACPI_FAILURE (status)) {
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
|
|
/* Convert and validate the device handle */
|
|
|
|
node = acpi_ns_map_handle_to_node (device);
|
|
if (!node) {
|
|
status = AE_BAD_PARAMETER;
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
/* Root Object */
|
|
|
|
if (device == ACPI_ROOT_OBJECT) {
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Removing notify handler for ROOT object.\n"));
|
|
|
|
if (((handler_type & ACPI_SYSTEM_NOTIFY) &&
|
|
!acpi_gbl_system_notify.handler) ||
|
|
((handler_type & ACPI_DEVICE_NOTIFY) &&
|
|
!acpi_gbl_device_notify.handler)) {
|
|
status = AE_NOT_EXIST;
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
/* Make sure all deferred tasks are completed */
|
|
|
|
(void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
|
|
acpi_os_wait_events_complete(NULL);
|
|
status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
|
|
if (ACPI_FAILURE (status)) {
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
|
|
if (handler_type & ACPI_SYSTEM_NOTIFY) {
|
|
acpi_gbl_system_notify.node = NULL;
|
|
acpi_gbl_system_notify.handler = NULL;
|
|
acpi_gbl_system_notify.context = NULL;
|
|
}
|
|
|
|
if (handler_type & ACPI_DEVICE_NOTIFY) {
|
|
acpi_gbl_device_notify.node = NULL;
|
|
acpi_gbl_device_notify.handler = NULL;
|
|
acpi_gbl_device_notify.context = NULL;
|
|
}
|
|
}
|
|
|
|
/* All Other Objects */
|
|
|
|
else {
|
|
/* Notifies allowed on this object? */
|
|
|
|
if (!acpi_ev_is_notify_object (node)) {
|
|
status = AE_TYPE;
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
/* Check for an existing internal object */
|
|
|
|
obj_desc = acpi_ns_get_attached_object (node);
|
|
if (!obj_desc) {
|
|
status = AE_NOT_EXIST;
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
/* Object exists - make sure there's an existing handler */
|
|
|
|
if (handler_type & ACPI_SYSTEM_NOTIFY) {
|
|
notify_obj = obj_desc->common_notify.system_notify;
|
|
if ((!notify_obj) ||
|
|
(notify_obj->notify.handler != handler)) {
|
|
status = AE_BAD_PARAMETER;
|
|
goto unlock_and_exit;
|
|
}
|
|
/* Make sure all deferred tasks are completed */
|
|
|
|
(void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
|
|
acpi_os_wait_events_complete(NULL);
|
|
status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
|
|
if (ACPI_FAILURE (status)) {
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
|
|
/* Remove the handler */
|
|
obj_desc->common_notify.system_notify = NULL;
|
|
acpi_ut_remove_reference (notify_obj);
|
|
}
|
|
|
|
if (handler_type & ACPI_DEVICE_NOTIFY) {
|
|
notify_obj = obj_desc->common_notify.device_notify;
|
|
if ((!notify_obj) ||
|
|
(notify_obj->notify.handler != handler)) {
|
|
status = AE_BAD_PARAMETER;
|
|
goto unlock_and_exit;
|
|
}
|
|
/* Make sure all deferred tasks are completed */
|
|
|
|
(void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
|
|
acpi_os_wait_events_complete(NULL);
|
|
status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
|
|
if (ACPI_FAILURE (status)) {
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
|
|
/* Remove the handler */
|
|
obj_desc->common_notify.device_notify = NULL;
|
|
acpi_ut_remove_reference (notify_obj);
|
|
}
|
|
}
|
|
|
|
|
|
unlock_and_exit:
|
|
(void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
EXPORT_SYMBOL(acpi_remove_notify_handler);
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_install_gpe_handler
|
|
*
|
|
* PARAMETERS: gpe_number - The GPE number within the GPE block
|
|
* gpe_block - GPE block (NULL == FADT GPEs)
|
|
* Type - Whether this GPE should be treated as an
|
|
* edge- or level-triggered interrupt.
|
|
* Address - Address of the handler
|
|
* Context - Value passed to the handler on each GPE
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Install a handler for a General Purpose Event.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_install_gpe_handler (
|
|
acpi_handle gpe_device,
|
|
u32 gpe_number,
|
|
u32 type,
|
|
acpi_event_handler address,
|
|
void *context)
|
|
{
|
|
struct acpi_gpe_event_info *gpe_event_info;
|
|
struct acpi_handler_info *handler;
|
|
acpi_status status;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE ("acpi_install_gpe_handler");
|
|
|
|
|
|
/* Parameter validation */
|
|
|
|
if ((!address) || (type > ACPI_GPE_XRUPT_TYPE_MASK)) {
|
|
return_ACPI_STATUS (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
/* Make sure that there isn't a handler there already */
|
|
|
|
if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) == ACPI_GPE_DISPATCH_HANDLER) {
|
|
status = AE_ALREADY_EXISTS;
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
/* Allocate and init handler object */
|
|
|
|
handler = ACPI_MEM_CALLOCATE (sizeof (struct acpi_handler_info));
|
|
if (!handler) {
|
|
status = AE_NO_MEMORY;
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
handler->address = address;
|
|
handler->context = context;
|
|
handler->method_node = gpe_event_info->dispatch.method_node;
|
|
|
|
/* Disable the GPE before installing the handler */
|
|
|
|
status = acpi_ev_disable_gpe (gpe_event_info);
|
|
if (ACPI_FAILURE (status)) {
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
/* Install the handler */
|
|
|
|
acpi_os_acquire_lock (acpi_gbl_gpe_lock, ACPI_NOT_ISR);
|
|
gpe_event_info->dispatch.handler = handler;
|
|
|
|
/* Setup up dispatch flags to indicate handler (vs. method) */
|
|
|
|
gpe_event_info->flags &= ~(ACPI_GPE_XRUPT_TYPE_MASK | ACPI_GPE_DISPATCH_MASK); /* Clear bits */
|
|
gpe_event_info->flags |= (u8) (type | ACPI_GPE_DISPATCH_HANDLER);
|
|
|
|
acpi_os_release_lock (acpi_gbl_gpe_lock, ACPI_NOT_ISR);
|
|
|
|
|
|
unlock_and_exit:
|
|
(void) acpi_ut_release_mutex (ACPI_MTX_EVENTS);
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
EXPORT_SYMBOL(acpi_install_gpe_handler);
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_remove_gpe_handler
|
|
*
|
|
* PARAMETERS: gpe_number - The event to remove a handler
|
|
* gpe_block - GPE block (NULL == FADT GPEs)
|
|
* Address - Address of the handler
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Remove a handler for a General Purpose acpi_event.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_remove_gpe_handler (
|
|
acpi_handle gpe_device,
|
|
u32 gpe_number,
|
|
acpi_event_handler address)
|
|
{
|
|
struct acpi_gpe_event_info *gpe_event_info;
|
|
struct acpi_handler_info *handler;
|
|
acpi_status status;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE ("acpi_remove_gpe_handler");
|
|
|
|
|
|
/* Parameter validation */
|
|
|
|
if (!address) {
|
|
return_ACPI_STATUS (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
/* Make sure that a handler is indeed installed */
|
|
|
|
if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) != ACPI_GPE_DISPATCH_HANDLER) {
|
|
status = AE_NOT_EXIST;
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
/* Make sure that the installed handler is the same */
|
|
|
|
if (gpe_event_info->dispatch.handler->address != address) {
|
|
status = AE_BAD_PARAMETER;
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
/* Disable the GPE before removing the handler */
|
|
|
|
status = acpi_ev_disable_gpe (gpe_event_info);
|
|
if (ACPI_FAILURE (status)) {
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
/* Make sure all deferred tasks are completed */
|
|
|
|
(void) acpi_ut_release_mutex (ACPI_MTX_EVENTS);
|
|
acpi_os_wait_events_complete(NULL);
|
|
status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS);
|
|
if (ACPI_FAILURE (status)) {
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
|
|
/* Remove the handler */
|
|
|
|
acpi_os_acquire_lock (acpi_gbl_gpe_lock, ACPI_NOT_ISR);
|
|
handler = gpe_event_info->dispatch.handler;
|
|
|
|
/* Restore Method node (if any), set dispatch flags */
|
|
|
|
gpe_event_info->dispatch.method_node = handler->method_node;
|
|
gpe_event_info->flags &= ~ACPI_GPE_DISPATCH_MASK; /* Clear bits */
|
|
if (handler->method_node) {
|
|
gpe_event_info->flags |= ACPI_GPE_DISPATCH_METHOD;
|
|
}
|
|
acpi_os_release_lock (acpi_gbl_gpe_lock, ACPI_NOT_ISR);
|
|
|
|
/* Now we can free the handler object */
|
|
|
|
ACPI_MEM_FREE (handler);
|
|
|
|
|
|
unlock_and_exit:
|
|
(void) acpi_ut_release_mutex (ACPI_MTX_EVENTS);
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
EXPORT_SYMBOL(acpi_remove_gpe_handler);
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_acquire_global_lock
|
|
*
|
|
* PARAMETERS: Timeout - How long the caller is willing to wait
|
|
* out_handle - A handle to the lock if acquired
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Acquire the ACPI Global Lock
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_acquire_global_lock (
|
|
u16 timeout,
|
|
u32 *handle)
|
|
{
|
|
acpi_status status;
|
|
|
|
|
|
if (!handle) {
|
|
return (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
status = acpi_ex_enter_interpreter ();
|
|
if (ACPI_FAILURE (status)) {
|
|
return (status);
|
|
}
|
|
|
|
status = acpi_ev_acquire_global_lock (timeout);
|
|
acpi_ex_exit_interpreter ();
|
|
|
|
if (ACPI_SUCCESS (status)) {
|
|
acpi_gbl_global_lock_handle++;
|
|
*handle = acpi_gbl_global_lock_handle;
|
|
}
|
|
|
|
return (status);
|
|
}
|
|
EXPORT_SYMBOL(acpi_acquire_global_lock);
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_release_global_lock
|
|
*
|
|
* PARAMETERS: Handle - Returned from acpi_acquire_global_lock
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Release the ACPI Global Lock
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_release_global_lock (
|
|
u32 handle)
|
|
{
|
|
acpi_status status;
|
|
|
|
|
|
if (handle != acpi_gbl_global_lock_handle) {
|
|
return (AE_NOT_ACQUIRED);
|
|
}
|
|
|
|
status = acpi_ev_release_global_lock ();
|
|
return (status);
|
|
}
|
|
EXPORT_SYMBOL(acpi_release_global_lock);
|
|
|