mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 10:49:33 +00:00
![Bob Moore](/assets/img/avatar_default.png)
ACPICA commit 16577e5265923f4999b4d2c0addb2343b18135e1 Affects all files. Link: https://github.com/acpica/acpica/commit/16577e52 Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lv Zheng <lv.zheng@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
1104 lines
31 KiB
C
1104 lines
31 KiB
C
/******************************************************************************
|
|
*
|
|
* Module Name: evxface - External interfaces for ACPI events
|
|
*
|
|
*****************************************************************************/
|
|
|
|
/*
|
|
* Copyright (C) 2000 - 2017, 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 "acnamesp.h"
|
|
#include "acevents.h"
|
|
#include "acinterp.h"
|
|
|
|
#define _COMPONENT ACPI_EVENTS
|
|
ACPI_MODULE_NAME("evxface")
|
|
#if (!ACPI_REDUCED_HARDWARE)
|
|
/* Local prototypes */
|
|
static acpi_status
|
|
acpi_ev_install_gpe_handler(acpi_handle gpe_device,
|
|
u32 gpe_number,
|
|
u32 type,
|
|
u8 is_raw_handler,
|
|
acpi_gpe_handler address, void *context);
|
|
|
|
#endif
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_install_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: Device Handler (80-FF)
|
|
* ACPI_ALL_NOTIFY: Both System and Device
|
|
* handler - Address of the handler
|
|
* context - Value passed to the handler on each GPE
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Install a handler for notifications on an ACPI Device,
|
|
* thermal_zone, or Processor object.
|
|
*
|
|
* NOTES: The Root namespace object may have only one handler for each
|
|
* type of notify (System/Device). Device/Thermal/Processor objects
|
|
* may have one device notify handler, and multiple system notify
|
|
* handlers.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_install_notify_handler(acpi_handle device,
|
|
u32 handler_type,
|
|
acpi_notify_handler handler, void *context)
|
|
{
|
|
struct acpi_namespace_node *node =
|
|
ACPI_CAST_PTR(struct acpi_namespace_node, device);
|
|
union acpi_operand_object *obj_desc;
|
|
union acpi_operand_object *handler_obj;
|
|
acpi_status status;
|
|
u32 i;
|
|
|
|
ACPI_FUNCTION_TRACE(acpi_install_notify_handler);
|
|
|
|
/* Parameter validation */
|
|
|
|
if ((!device) || (!handler) || (!handler_type) ||
|
|
(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);
|
|
}
|
|
|
|
/*
|
|
* Root Object:
|
|
* Registering a notify handler on the root object indicates that the
|
|
* caller wishes to receive notifications for all objects. Note that
|
|
* only one global handler can be registered per notify type.
|
|
* Ensure that a handler is not already installed.
|
|
*/
|
|
if (device == ACPI_ROOT_OBJECT) {
|
|
for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) {
|
|
if (handler_type & (i + 1)) {
|
|
if (acpi_gbl_global_notify[i].handler) {
|
|
status = AE_ALREADY_EXISTS;
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
acpi_gbl_global_notify[i].handler = handler;
|
|
acpi_gbl_global_notify[i].context = context;
|
|
}
|
|
}
|
|
|
|
goto unlock_and_exit; /* Global notify handler installed, all done */
|
|
}
|
|
|
|
/*
|
|
* All Other Objects:
|
|
* Caller will only receive notifications specific to the target
|
|
* object. Note that only certain object types are allowed to
|
|
* receive notifications.
|
|
*/
|
|
|
|
/* Are 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, might not exist */
|
|
|
|
obj_desc = acpi_ns_get_attached_object(node);
|
|
if (!obj_desc) {
|
|
|
|
/* Create a new object */
|
|
|
|
obj_desc = acpi_ut_create_internal_object(node->type);
|
|
if (!obj_desc) {
|
|
status = AE_NO_MEMORY;
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
/* Attach new object to the Node, remove local reference */
|
|
|
|
status = acpi_ns_attach_object(device, obj_desc, node->type);
|
|
acpi_ut_remove_reference(obj_desc);
|
|
if (ACPI_FAILURE(status)) {
|
|
goto unlock_and_exit;
|
|
}
|
|
}
|
|
|
|
/* Ensure that the handler is not already installed in the lists */
|
|
|
|
for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) {
|
|
if (handler_type & (i + 1)) {
|
|
handler_obj = obj_desc->common_notify.notify_list[i];
|
|
while (handler_obj) {
|
|
if (handler_obj->notify.handler == handler) {
|
|
status = AE_ALREADY_EXISTS;
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
handler_obj = handler_obj->notify.next[i];
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Create and populate a new notify handler object */
|
|
|
|
handler_obj = acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_NOTIFY);
|
|
if (!handler_obj) {
|
|
status = AE_NO_MEMORY;
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
handler_obj->notify.node = node;
|
|
handler_obj->notify.handler_type = handler_type;
|
|
handler_obj->notify.handler = handler;
|
|
handler_obj->notify.context = context;
|
|
|
|
/* Install the handler at the list head(s) */
|
|
|
|
for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) {
|
|
if (handler_type & (i + 1)) {
|
|
handler_obj->notify.next[i] =
|
|
obj_desc->common_notify.notify_list[i];
|
|
|
|
obj_desc->common_notify.notify_list[i] = handler_obj;
|
|
}
|
|
}
|
|
|
|
/* Add an extra reference if handler was installed in both lists */
|
|
|
|
if (handler_type == ACPI_ALL_NOTIFY) {
|
|
acpi_ut_add_reference(handler_obj);
|
|
}
|
|
|
|
unlock_and_exit:
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL(acpi_install_notify_handler)
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_remove_notify_handler
|
|
*
|
|
* PARAMETERS: device - The device for which the handler is installed
|
|
* handler_type - The type of handler:
|
|
* ACPI_SYSTEM_NOTIFY: System Handler (00-7F)
|
|
* ACPI_DEVICE_NOTIFY: Device 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
|
|
*
|
|
******************************************************************************/
|
|
acpi_status
|
|
acpi_remove_notify_handler(acpi_handle device,
|
|
u32 handler_type, acpi_notify_handler handler)
|
|
{
|
|
struct acpi_namespace_node *node =
|
|
ACPI_CAST_PTR(struct acpi_namespace_node, device);
|
|
union acpi_operand_object *obj_desc;
|
|
union acpi_operand_object *handler_obj;
|
|
union acpi_operand_object *previous_handler_obj;
|
|
acpi_status status = AE_OK;
|
|
u32 i;
|
|
|
|
ACPI_FUNCTION_TRACE(acpi_remove_notify_handler);
|
|
|
|
/* Parameter validation */
|
|
|
|
if ((!device) || (!handler) || (!handler_type) ||
|
|
(handler_type > ACPI_MAX_NOTIFY_HANDLER_TYPE)) {
|
|
return_ACPI_STATUS(AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/* Root Object. Global handlers are removed here */
|
|
|
|
if (device == ACPI_ROOT_OBJECT) {
|
|
for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) {
|
|
if (handler_type & (i + 1)) {
|
|
status =
|
|
acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
|
|
if (ACPI_FAILURE(status)) {
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
if (!acpi_gbl_global_notify[i].handler ||
|
|
(acpi_gbl_global_notify[i].handler !=
|
|
handler)) {
|
|
status = AE_NOT_EXIST;
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"Removing global notify handler\n"));
|
|
|
|
acpi_gbl_global_notify[i].handler = NULL;
|
|
acpi_gbl_global_notify[i].context = NULL;
|
|
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
|
|
|
|
/* Make sure all deferred notify tasks are completed */
|
|
|
|
acpi_os_wait_events_complete();
|
|
}
|
|
}
|
|
|
|
return_ACPI_STATUS(AE_OK);
|
|
}
|
|
|
|
/* All other objects: Are Notifies allowed on this object? */
|
|
|
|
if (!acpi_ev_is_notify_object(node)) {
|
|
return_ACPI_STATUS(AE_TYPE);
|
|
}
|
|
|
|
/* Must have an existing internal object */
|
|
|
|
obj_desc = acpi_ns_get_attached_object(node);
|
|
if (!obj_desc) {
|
|
return_ACPI_STATUS(AE_NOT_EXIST);
|
|
}
|
|
|
|
/* Internal object exists. Find the handler and remove it */
|
|
|
|
for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) {
|
|
if (handler_type & (i + 1)) {
|
|
status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
|
|
if (ACPI_FAILURE(status)) {
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
handler_obj = obj_desc->common_notify.notify_list[i];
|
|
previous_handler_obj = NULL;
|
|
|
|
/* Attempt to find the handler in the handler list */
|
|
|
|
while (handler_obj &&
|
|
(handler_obj->notify.handler != handler)) {
|
|
previous_handler_obj = handler_obj;
|
|
handler_obj = handler_obj->notify.next[i];
|
|
}
|
|
|
|
if (!handler_obj) {
|
|
status = AE_NOT_EXIST;
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
/* Remove the handler object from the list */
|
|
|
|
if (previous_handler_obj) { /* Handler is not at the list head */
|
|
previous_handler_obj->notify.next[i] =
|
|
handler_obj->notify.next[i];
|
|
} else { /* Handler is at the list head */
|
|
|
|
obj_desc->common_notify.notify_list[i] =
|
|
handler_obj->notify.next[i];
|
|
}
|
|
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
|
|
|
|
/* Make sure all deferred notify tasks are completed */
|
|
|
|
acpi_os_wait_events_complete();
|
|
acpi_ut_remove_reference(handler_obj);
|
|
}
|
|
}
|
|
|
|
return_ACPI_STATUS(status);
|
|
|
|
unlock_and_exit:
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL(acpi_remove_notify_handler)
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_install_exception_handler
|
|
*
|
|
* PARAMETERS: handler - Pointer to the handler function for the
|
|
* event
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Saves the pointer to the handler function
|
|
*
|
|
******************************************************************************/
|
|
#ifdef ACPI_FUTURE_USAGE
|
|
acpi_status acpi_install_exception_handler(acpi_exception_handler handler)
|
|
{
|
|
acpi_status status;
|
|
|
|
ACPI_FUNCTION_TRACE(acpi_install_exception_handler);
|
|
|
|
status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
|
|
if (ACPI_FAILURE(status)) {
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/* Don't allow two handlers. */
|
|
|
|
if (acpi_gbl_exception_handler) {
|
|
status = AE_ALREADY_EXISTS;
|
|
goto cleanup;
|
|
}
|
|
|
|
/* Install the handler */
|
|
|
|
acpi_gbl_exception_handler = handler;
|
|
|
|
cleanup:
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL(acpi_install_exception_handler)
|
|
#endif
|
|
|
|
#if (!ACPI_REDUCED_HARDWARE)
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_install_sci_handler
|
|
*
|
|
* PARAMETERS: address - Address of the handler
|
|
* context - Value passed to the handler on each SCI
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Install a handler for a System Control Interrupt.
|
|
*
|
|
******************************************************************************/
|
|
acpi_status acpi_install_sci_handler(acpi_sci_handler address, void *context)
|
|
{
|
|
struct acpi_sci_handler_info *new_sci_handler;
|
|
struct acpi_sci_handler_info *sci_handler;
|
|
acpi_cpu_flags flags;
|
|
acpi_status status;
|
|
|
|
ACPI_FUNCTION_TRACE(acpi_install_sci_handler);
|
|
|
|
if (!address) {
|
|
return_ACPI_STATUS(AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/* Allocate and init a handler object */
|
|
|
|
new_sci_handler = ACPI_ALLOCATE(sizeof(struct acpi_sci_handler_info));
|
|
if (!new_sci_handler) {
|
|
return_ACPI_STATUS(AE_NO_MEMORY);
|
|
}
|
|
|
|
new_sci_handler->address = address;
|
|
new_sci_handler->context = context;
|
|
|
|
status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
|
|
if (ACPI_FAILURE(status)) {
|
|
goto exit;
|
|
}
|
|
|
|
/* Lock list during installation */
|
|
|
|
flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
|
|
sci_handler = acpi_gbl_sci_handler_list;
|
|
|
|
/* Ensure handler does not already exist */
|
|
|
|
while (sci_handler) {
|
|
if (address == sci_handler->address) {
|
|
status = AE_ALREADY_EXISTS;
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
sci_handler = sci_handler->next;
|
|
}
|
|
|
|
/* Install the new handler into the global list (at head) */
|
|
|
|
new_sci_handler->next = acpi_gbl_sci_handler_list;
|
|
acpi_gbl_sci_handler_list = new_sci_handler;
|
|
|
|
unlock_and_exit:
|
|
|
|
acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
|
|
|
|
exit:
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_FREE(new_sci_handler);
|
|
}
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL(acpi_install_sci_handler)
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_remove_sci_handler
|
|
*
|
|
* PARAMETERS: address - Address of the handler
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Remove a handler for a System Control Interrupt.
|
|
*
|
|
******************************************************************************/
|
|
acpi_status acpi_remove_sci_handler(acpi_sci_handler address)
|
|
{
|
|
struct acpi_sci_handler_info *prev_sci_handler;
|
|
struct acpi_sci_handler_info *next_sci_handler;
|
|
acpi_cpu_flags flags;
|
|
acpi_status status;
|
|
|
|
ACPI_FUNCTION_TRACE(acpi_remove_sci_handler);
|
|
|
|
if (!address) {
|
|
return_ACPI_STATUS(AE_BAD_PARAMETER);
|
|
}
|
|
|
|
status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
|
|
if (ACPI_FAILURE(status)) {
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/* Remove the SCI handler with lock */
|
|
|
|
flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
|
|
|
|
prev_sci_handler = NULL;
|
|
next_sci_handler = acpi_gbl_sci_handler_list;
|
|
while (next_sci_handler) {
|
|
if (next_sci_handler->address == address) {
|
|
|
|
/* Unlink and free the SCI handler info block */
|
|
|
|
if (prev_sci_handler) {
|
|
prev_sci_handler->next = next_sci_handler->next;
|
|
} else {
|
|
acpi_gbl_sci_handler_list =
|
|
next_sci_handler->next;
|
|
}
|
|
|
|
acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
|
|
ACPI_FREE(next_sci_handler);
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
prev_sci_handler = next_sci_handler;
|
|
next_sci_handler = next_sci_handler->next;
|
|
}
|
|
|
|
acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
|
|
status = AE_NOT_EXIST;
|
|
|
|
unlock_and_exit:
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL(acpi_remove_sci_handler)
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_install_global_event_handler
|
|
*
|
|
* PARAMETERS: handler - Pointer to the global event handler function
|
|
* context - Value passed to the handler on each event
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Saves the pointer to the handler function. The global handler
|
|
* is invoked upon each incoming GPE and Fixed Event. It is
|
|
* invoked at interrupt level at the time of the event dispatch.
|
|
* Can be used to update event counters, etc.
|
|
*
|
|
******************************************************************************/
|
|
acpi_status
|
|
acpi_install_global_event_handler(acpi_gbl_event_handler handler, void *context)
|
|
{
|
|
acpi_status status;
|
|
|
|
ACPI_FUNCTION_TRACE(acpi_install_global_event_handler);
|
|
|
|
/* Parameter validation */
|
|
|
|
if (!handler) {
|
|
return_ACPI_STATUS(AE_BAD_PARAMETER);
|
|
}
|
|
|
|
status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
|
|
if (ACPI_FAILURE(status)) {
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/* Don't allow two handlers. */
|
|
|
|
if (acpi_gbl_global_event_handler) {
|
|
status = AE_ALREADY_EXISTS;
|
|
goto cleanup;
|
|
}
|
|
|
|
acpi_gbl_global_event_handler = handler;
|
|
acpi_gbl_global_event_handler_context = context;
|
|
|
|
cleanup:
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL(acpi_install_global_event_handler)
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_install_fixed_event_handler
|
|
*
|
|
* PARAMETERS: event - Event type to enable.
|
|
* handler - Pointer to the handler function for the
|
|
* event
|
|
* context - Value passed to the handler on each GPE
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Saves the pointer to the handler function and then enables the
|
|
* event.
|
|
*
|
|
******************************************************************************/
|
|
acpi_status
|
|
acpi_install_fixed_event_handler(u32 event,
|
|
acpi_event_handler handler, void *context)
|
|
{
|
|
acpi_status status;
|
|
|
|
ACPI_FUNCTION_TRACE(acpi_install_fixed_event_handler);
|
|
|
|
/* Parameter validation */
|
|
|
|
if (event > ACPI_EVENT_MAX) {
|
|
return_ACPI_STATUS(AE_BAD_PARAMETER);
|
|
}
|
|
|
|
status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
|
|
if (ACPI_FAILURE(status)) {
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/* Do not allow multiple handlers */
|
|
|
|
if (acpi_gbl_fixed_event_handlers[event].handler) {
|
|
status = AE_ALREADY_EXISTS;
|
|
goto cleanup;
|
|
}
|
|
|
|
/* Install the handler before enabling the event */
|
|
|
|
acpi_gbl_fixed_event_handlers[event].handler = handler;
|
|
acpi_gbl_fixed_event_handlers[event].context = context;
|
|
|
|
status = acpi_clear_event(event);
|
|
if (ACPI_SUCCESS(status))
|
|
status = acpi_enable_event(event, 0);
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_WARNING((AE_INFO,
|
|
"Could not enable fixed event - %s (%u)",
|
|
acpi_ut_get_event_name(event), event));
|
|
|
|
/* Remove the handler */
|
|
|
|
acpi_gbl_fixed_event_handlers[event].handler = NULL;
|
|
acpi_gbl_fixed_event_handlers[event].context = NULL;
|
|
} else {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"Enabled fixed event %s (%X), Handler=%p\n",
|
|
acpi_ut_get_event_name(event), event,
|
|
handler));
|
|
}
|
|
|
|
cleanup:
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL(acpi_install_fixed_event_handler)
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_remove_fixed_event_handler
|
|
*
|
|
* PARAMETERS: event - Event type to disable.
|
|
* handler - Address of the handler
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Disables the event and unregisters the event handler.
|
|
*
|
|
******************************************************************************/
|
|
acpi_status
|
|
acpi_remove_fixed_event_handler(u32 event, acpi_event_handler handler)
|
|
{
|
|
acpi_status status = AE_OK;
|
|
|
|
ACPI_FUNCTION_TRACE(acpi_remove_fixed_event_handler);
|
|
|
|
/* Parameter validation */
|
|
|
|
if (event > ACPI_EVENT_MAX) {
|
|
return_ACPI_STATUS(AE_BAD_PARAMETER);
|
|
}
|
|
|
|
status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
|
|
if (ACPI_FAILURE(status)) {
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/* Disable the event before removing the handler */
|
|
|
|
status = acpi_disable_event(event, 0);
|
|
|
|
/* Always Remove the handler */
|
|
|
|
acpi_gbl_fixed_event_handlers[event].handler = NULL;
|
|
acpi_gbl_fixed_event_handlers[event].context = NULL;
|
|
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_WARNING((AE_INFO,
|
|
"Could not disable fixed event - %s (%u)",
|
|
acpi_ut_get_event_name(event), event));
|
|
} else {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"Disabled fixed event - %s (%X)\n",
|
|
acpi_ut_get_event_name(event), event));
|
|
}
|
|
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL(acpi_remove_fixed_event_handler)
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ev_install_gpe_handler
|
|
*
|
|
* PARAMETERS: gpe_device - Namespace node for the GPE (NULL for FADT
|
|
* defined GPEs)
|
|
* gpe_number - The GPE number within the GPE block
|
|
* type - Whether this GPE should be treated as an
|
|
* edge- or level-triggered interrupt.
|
|
* is_raw_handler - Whether this GPE should be handled using
|
|
* the special GPE handler mode.
|
|
* address - Address of the handler
|
|
* context - Value passed to the handler on each GPE
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Internal function to install a handler for a General Purpose
|
|
* Event.
|
|
*
|
|
******************************************************************************/
|
|
static acpi_status
|
|
acpi_ev_install_gpe_handler(acpi_handle gpe_device,
|
|
u32 gpe_number,
|
|
u32 type,
|
|
u8 is_raw_handler,
|
|
acpi_gpe_handler address, void *context)
|
|
{
|
|
struct acpi_gpe_event_info *gpe_event_info;
|
|
struct acpi_gpe_handler_info *handler;
|
|
acpi_status status;
|
|
acpi_cpu_flags flags;
|
|
|
|
ACPI_FUNCTION_TRACE(ev_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);
|
|
}
|
|
|
|
/* Allocate and init handler object (before lock) */
|
|
|
|
handler = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_handler_info));
|
|
if (!handler) {
|
|
status = AE_NO_MEMORY;
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
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 free_and_exit;
|
|
}
|
|
|
|
/* Make sure that there isn't a handler there already */
|
|
|
|
if ((ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
|
|
ACPI_GPE_DISPATCH_HANDLER) ||
|
|
(ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
|
|
ACPI_GPE_DISPATCH_RAW_HANDLER)) {
|
|
status = AE_ALREADY_EXISTS;
|
|
goto free_and_exit;
|
|
}
|
|
|
|
handler->address = address;
|
|
handler->context = context;
|
|
handler->method_node = gpe_event_info->dispatch.method_node;
|
|
handler->original_flags = (u8)(gpe_event_info->flags &
|
|
(ACPI_GPE_XRUPT_TYPE_MASK |
|
|
ACPI_GPE_DISPATCH_MASK));
|
|
|
|
/*
|
|
* If the GPE is associated with a method, it may have been enabled
|
|
* automatically during initialization, in which case it has to be
|
|
* disabled now to avoid spurious execution of the handler.
|
|
*/
|
|
if (((ACPI_GPE_DISPATCH_TYPE(handler->original_flags) ==
|
|
ACPI_GPE_DISPATCH_METHOD) ||
|
|
(ACPI_GPE_DISPATCH_TYPE(handler->original_flags) ==
|
|
ACPI_GPE_DISPATCH_NOTIFY)) && gpe_event_info->runtime_count) {
|
|
handler->originally_enabled = TRUE;
|
|
(void)acpi_ev_remove_gpe_reference(gpe_event_info);
|
|
|
|
/* Sanity check of original type against new type */
|
|
|
|
if (type !=
|
|
(u32)(gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK)) {
|
|
ACPI_WARNING((AE_INFO,
|
|
"GPE type mismatch (level/edge)"));
|
|
}
|
|
}
|
|
|
|
/* Install the handler */
|
|
|
|
gpe_event_info->dispatch.handler = handler;
|
|
|
|
/* Setup up dispatch flags to indicate handler (vs. method/notify) */
|
|
|
|
gpe_event_info->flags &=
|
|
~(ACPI_GPE_XRUPT_TYPE_MASK | ACPI_GPE_DISPATCH_MASK);
|
|
gpe_event_info->flags |=
|
|
(u8)(type |
|
|
(is_raw_handler ? ACPI_GPE_DISPATCH_RAW_HANDLER :
|
|
ACPI_GPE_DISPATCH_HANDLER));
|
|
|
|
acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
|
|
|
|
unlock_and_exit:
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
|
|
return_ACPI_STATUS(status);
|
|
|
|
free_and_exit:
|
|
acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
|
|
ACPI_FREE(handler);
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_install_gpe_handler
|
|
*
|
|
* PARAMETERS: gpe_device - Namespace node for the GPE (NULL for FADT
|
|
* defined GPEs)
|
|
* gpe_number - The GPE number within the GPE block
|
|
* 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_gpe_handler address, void *context)
|
|
{
|
|
acpi_status status;
|
|
|
|
ACPI_FUNCTION_TRACE(acpi_install_gpe_handler);
|
|
|
|
status = acpi_ev_install_gpe_handler(gpe_device, gpe_number, type,
|
|
FALSE, address, context);
|
|
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL(acpi_install_gpe_handler)
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_install_gpe_raw_handler
|
|
*
|
|
* PARAMETERS: gpe_device - Namespace node for the GPE (NULL for FADT
|
|
* defined GPEs)
|
|
* gpe_number - The GPE number within the GPE block
|
|
* 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_raw_handler(acpi_handle gpe_device,
|
|
u32 gpe_number,
|
|
u32 type, acpi_gpe_handler address, void *context)
|
|
{
|
|
acpi_status status;
|
|
|
|
ACPI_FUNCTION_TRACE(acpi_install_gpe_raw_handler);
|
|
|
|
status = acpi_ev_install_gpe_handler(gpe_device, gpe_number, type,
|
|
TRUE, address, context);
|
|
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL(acpi_install_gpe_raw_handler)
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_remove_gpe_handler
|
|
*
|
|
* PARAMETERS: gpe_device - Namespace node for the GPE (NULL for FADT
|
|
* defined GPEs)
|
|
* gpe_number - The event to remove a handler
|
|
* 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_gpe_handler address)
|
|
{
|
|
struct acpi_gpe_event_info *gpe_event_info;
|
|
struct acpi_gpe_handler_info *handler;
|
|
acpi_status status;
|
|
acpi_cpu_flags flags;
|
|
|
|
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);
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
/* Make sure that a handler is indeed installed */
|
|
|
|
if ((ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) !=
|
|
ACPI_GPE_DISPATCH_HANDLER) &&
|
|
(ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) !=
|
|
ACPI_GPE_DISPATCH_RAW_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;
|
|
}
|
|
|
|
/* Remove the handler */
|
|
|
|
handler = gpe_event_info->dispatch.handler;
|
|
gpe_event_info->dispatch.handler = NULL;
|
|
|
|
/* Restore Method node (if any), set dispatch flags */
|
|
|
|
gpe_event_info->dispatch.method_node = handler->method_node;
|
|
gpe_event_info->flags &=
|
|
~(ACPI_GPE_XRUPT_TYPE_MASK | ACPI_GPE_DISPATCH_MASK);
|
|
gpe_event_info->flags |= handler->original_flags;
|
|
|
|
/*
|
|
* If the GPE was previously associated with a method and it was
|
|
* enabled, it should be enabled at this point to restore the
|
|
* post-initialization configuration.
|
|
*/
|
|
if (((ACPI_GPE_DISPATCH_TYPE(handler->original_flags) ==
|
|
ACPI_GPE_DISPATCH_METHOD) ||
|
|
(ACPI_GPE_DISPATCH_TYPE(handler->original_flags) ==
|
|
ACPI_GPE_DISPATCH_NOTIFY)) && handler->originally_enabled) {
|
|
(void)acpi_ev_add_gpe_reference(gpe_event_info);
|
|
}
|
|
|
|
acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
|
|
|
|
/* Make sure all deferred GPE tasks are completed */
|
|
|
|
acpi_os_wait_events_complete();
|
|
|
|
/* Now we can free the handler object */
|
|
|
|
ACPI_FREE(handler);
|
|
return_ACPI_STATUS(status);
|
|
|
|
unlock_and_exit:
|
|
acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
|
|
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL(acpi_remove_gpe_handler)
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_acquire_global_lock
|
|
*
|
|
* PARAMETERS: timeout - How long the caller is willing to wait
|
|
* handle - Where the handle to the lock is returned
|
|
* (if acquired)
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Acquire the ACPI Global Lock
|
|
*
|
|
* Note: Allows callers with the same thread ID to acquire the global lock
|
|
* multiple times. In other words, externally, the behavior of the global lock
|
|
* is identical to an AML mutex. On the first acquire, a new handle is
|
|
* returned. On any subsequent calls to acquire by the same thread, the same
|
|
* handle is returned.
|
|
*
|
|
******************************************************************************/
|
|
acpi_status acpi_acquire_global_lock(u16 timeout, u32 *handle)
|
|
{
|
|
acpi_status status;
|
|
|
|
if (!handle) {
|
|
return (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/* Must lock interpreter to prevent race conditions */
|
|
|
|
acpi_ex_enter_interpreter();
|
|
|
|
status = acpi_ex_acquire_mutex_object(timeout,
|
|
acpi_gbl_global_lock_mutex,
|
|
acpi_os_get_thread_id());
|
|
|
|
if (ACPI_SUCCESS(status)) {
|
|
|
|
/* Return the global lock handle (updated in acpi_ev_acquire_global_lock) */
|
|
|
|
*handle = acpi_gbl_global_lock_handle;
|
|
}
|
|
|
|
acpi_ex_exit_interpreter();
|
|
return (status);
|
|
}
|
|
|
|
ACPI_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. The handle must be valid.
|
|
*
|
|
******************************************************************************/
|
|
acpi_status acpi_release_global_lock(u32 handle)
|
|
{
|
|
acpi_status status;
|
|
|
|
if (!handle || (handle != acpi_gbl_global_lock_handle)) {
|
|
return (AE_NOT_ACQUIRED);
|
|
}
|
|
|
|
status = acpi_ex_release_mutex_object(acpi_gbl_global_lock_mutex);
|
|
return (status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL(acpi_release_global_lock)
|
|
#endif /* !ACPI_REDUCED_HARDWARE */
|