366 lines
10 KiB
C
366 lines
10 KiB
C
|
/*******************************************************************************
|
||
|
|
*
|
||
|
|
* Module Name: utmutex - local mutex support
|
||
|
|
*
|
||
|
|
******************************************************************************/
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Copyright (C) 2000 - 2016, Intel Corp.
|
||
|
|
* All rights reserved.
|
||
|
|
*
|
||
|
|
* Redistribution and use in source and binary forms, with or without
|
||
|
|
* modification, are permitted provided that the following conditions
|
||
|
|
* are met:
|
||
|
|
* 1. Redistributions of source code must retain the above copyright
|
||
|
|
* notice, this list of conditions, and the following disclaimer,
|
||
|
|
* without modification.
|
||
|
|
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
|
||
|
|
* substantially similar to the "NO WARRANTY" disclaimer below
|
||
|
|
* ("Disclaimer") and any redistribution must be conditioned upon
|
||
|
|
* including a substantially similar Disclaimer requirement for further
|
||
|
|
* binary redistribution.
|
||
|
|
* 3. Neither the names of the above-listed copyright holders nor the names
|
||
|
|
* of any contributors may be used to endorse or promote products derived
|
||
|
|
* from this software without specific prior written permission.
|
||
|
|
*
|
||
|
|
* Alternatively, this software may be distributed under the terms of the
|
||
|
|
* GNU General Public License ("GPL") version 2 as published by the Free
|
||
|
|
* Software Foundation.
|
||
|
|
*
|
||
|
|
* NO WARRANTY
|
||
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
|
||
|
|
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
||
|
|
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
||
|
|
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
|
||
|
|
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||
|
|
* POSSIBILITY OF SUCH DAMAGES.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <acpi/acpi.h>
|
||
|
|
#include "accommon.h"
|
||
|
|
|
||
|
|
#define _COMPONENT ACPI_UTILITIES
|
||
|
|
ACPI_MODULE_NAME("utmutex")
|
||
|
|
|
||
|
|
/* Local prototypes */
|
||
|
|
static acpi_status acpi_ut_create_mutex(acpi_mutex_handle mutex_id);
|
||
|
|
|
||
|
|
static void acpi_ut_delete_mutex(acpi_mutex_handle mutex_id);
|
||
|
|
|
||
|
|
/*******************************************************************************
|
||
|
|
*
|
||
|
|
* FUNCTION: acpi_ut_mutex_initialize
|
||
|
|
*
|
||
|
|
* PARAMETERS: None.
|
||
|
|
*
|
||
|
|
* RETURN: Status
|
||
|
|
*
|
||
|
|
* DESCRIPTION: Create the system mutex objects. This includes mutexes,
|
||
|
|
* spin locks, and reader/writer locks.
|
||
|
|
*
|
||
|
|
******************************************************************************/
|
||
|
|
|
||
|
|
acpi_status acpi_ut_mutex_initialize(void)
|
||
|
|
{
|
||
|
|
u32 i;
|
||
|
|
acpi_status status;
|
||
|
|
|
||
|
|
ACPI_FUNCTION_TRACE(ut_mutex_initialize);
|
||
|
|
|
||
|
|
/* Create each of the predefined mutex objects */
|
||
|
|
|
||
|
|
for (i = 0; i < ACPI_NUM_MUTEX; i++) {
|
||
|
|
status = acpi_ut_create_mutex(i);
|
||
|
|
if (ACPI_FAILURE(status)) {
|
||
|
|
return_ACPI_STATUS(status);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Create the spinlocks for use at interrupt level or for speed */
|
||
|
|
|
||
|
|
status = acpi_os_create_lock (&acpi_gbl_gpe_lock);
|
||
|
|
if (ACPI_FAILURE (status)) {
|
||
|
|
return_ACPI_STATUS (status);
|
||
|
|
}
|
||
|
|
|
||
|
|
status = acpi_os_create_lock (&acpi_gbl_hardware_lock);
|
||
|
|
if (ACPI_FAILURE (status)) {
|
||
|
|
return_ACPI_STATUS (status);
|
||
|
|
}
|
||
|
|
|
||
|
|
status = acpi_os_create_lock(&acpi_gbl_reference_count_lock);
|
||
|
|
if (ACPI_FAILURE(status)) {
|
||
|
|
return_ACPI_STATUS(status);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Mutex for _OSI support */
|
||
|
|
|
||
|
|
status = acpi_os_create_mutex(&acpi_gbl_osi_mutex);
|
||
|
|
if (ACPI_FAILURE(status)) {
|
||
|
|
return_ACPI_STATUS(status);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Create the reader/writer lock for namespace access */
|
||
|
|
|
||
|
|
status = acpi_ut_create_rw_lock(&acpi_gbl_namespace_rw_lock);
|
||
|
|
if (ACPI_FAILURE(status)) {
|
||
|
|
return_ACPI_STATUS(status);
|
||
|
|
}
|
||
|
|
|
||
|
|
return_ACPI_STATUS(status);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*******************************************************************************
|
||
|
|
*
|
||
|
|
* FUNCTION: acpi_ut_mutex_terminate
|
||
|
|
*
|
||
|
|
* PARAMETERS: None.
|
||
|
|
*
|
||
|
|
* RETURN: None.
|
||
|
|
*
|
||
|
|
* DESCRIPTION: Delete all of the system mutex objects. This includes mutexes,
|
||
|
|
* spin locks, and reader/writer locks.
|
||
|
|
*
|
||
|
|
******************************************************************************/
|
||
|
|
|
||
|
|
void acpi_ut_mutex_terminate(void)
|
||
|
|
{
|
||
|
|
u32 i;
|
||
|
|
|
||
|
|
ACPI_FUNCTION_TRACE(ut_mutex_terminate);
|
||
|
|
|
||
|
|
/* Delete each predefined mutex object */
|
||
|
|
|
||
|
|
for (i = 0; i < ACPI_NUM_MUTEX; i++) {
|
||
|
|
acpi_ut_delete_mutex(i);
|
||
|
|
}
|
||
|
|
|
||
|
|
acpi_os_delete_mutex(acpi_gbl_osi_mutex);
|
||
|
|
|
||
|
|
/* Delete the spinlocks */
|
||
|
|
|
||
|
|
acpi_os_delete_lock(acpi_gbl_gpe_lock);
|
||
|
|
acpi_os_delete_lock(acpi_gbl_hardware_lock);
|
||
|
|
acpi_os_delete_lock(acpi_gbl_reference_count_lock);
|
||
|
|
|
||
|
|
/* Delete the reader/writer lock */
|
||
|
|
|
||
|
|
acpi_ut_delete_rw_lock(&acpi_gbl_namespace_rw_lock);
|
||
|
|
return_VOID;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*******************************************************************************
|
||
|
|
*
|
||
|
|
* FUNCTION: acpi_ut_create_mutex
|
||
|
|
*
|
||
|
|
* PARAMETERS: mutex_ID - ID of the mutex to be created
|
||
|
|
*
|
||
|
|
* RETURN: Status
|
||
|
|
*
|
||
|
|
* DESCRIPTION: Create a mutex object.
|
||
|
|
*
|
||
|
|
******************************************************************************/
|
||
|
|
|
||
|
|
static acpi_status acpi_ut_create_mutex(acpi_mutex_handle mutex_id)
|
||
|
|
{
|
||
|
|
acpi_status status = AE_OK;
|
||
|
|
|
||
|
|
ACPI_FUNCTION_TRACE_U32(ut_create_mutex, mutex_id);
|
||
|
|
|
||
|
|
if (!acpi_gbl_mutex_info[mutex_id].mutex) {
|
||
|
|
status =
|
||
|
|
acpi_os_create_mutex(&acpi_gbl_mutex_info[mutex_id].mutex);
|
||
|
|
acpi_gbl_mutex_info[mutex_id].thread_id =
|
||
|
|
ACPI_MUTEX_NOT_ACQUIRED;
|
||
|
|
acpi_gbl_mutex_info[mutex_id].use_count = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
return_ACPI_STATUS(status);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*******************************************************************************
|
||
|
|
*
|
||
|
|
* FUNCTION: acpi_ut_delete_mutex
|
||
|
|
*
|
||
|
|
* PARAMETERS: mutex_ID - ID of the mutex to be deleted
|
||
|
|
*
|
||
|
|
* RETURN: Status
|
||
|
|
*
|
||
|
|
* DESCRIPTION: Delete a mutex object.
|
||
|
|
*
|
||
|
|
******************************************************************************/
|
||
|
|
|
||
|
|
static void acpi_ut_delete_mutex(acpi_mutex_handle mutex_id)
|
||
|
|
{
|
||
|
|
|
||
|
|
ACPI_FUNCTION_TRACE_U32(ut_delete_mutex, mutex_id);
|
||
|
|
|
||
|
|
acpi_os_delete_mutex(acpi_gbl_mutex_info[mutex_id].mutex);
|
||
|
|
|
||
|
|
acpi_gbl_mutex_info[mutex_id].mutex = NULL;
|
||
|
|
acpi_gbl_mutex_info[mutex_id].thread_id = ACPI_MUTEX_NOT_ACQUIRED;
|
||
|
|
|
||
|
|
return_VOID;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*******************************************************************************
|
||
|
|
*
|
||
|
|
* FUNCTION: acpi_ut_acquire_mutex
|
||
|
|
*
|
||
|
|
* PARAMETERS: mutex_ID - ID of the mutex to be acquired
|
||
|
|
*
|
||
|
|
* RETURN: Status
|
||
|
|
*
|
||
|
|
* DESCRIPTION: Acquire a mutex object.
|
||
|
|
*
|
||
|
|
******************************************************************************/
|
||
|
|
|
||
|
|
acpi_status acpi_ut_acquire_mutex(acpi_mutex_handle mutex_id)
|
||
|
|
{
|
||
|
|
acpi_status status;
|
||
|
|
acpi_thread_id this_thread_id;
|
||
|
|
|
||
|
|
ACPI_FUNCTION_NAME(ut_acquire_mutex);
|
||
|
|
|
||
|
|
if (mutex_id > ACPI_MAX_MUTEX) {
|
||
|
|
return (AE_BAD_PARAMETER);
|
||
|
|
}
|
||
|
|
|
||
|
|
this_thread_id = acpi_os_get_thread_id();
|
||
|
|
|
||
|
|
#ifdef ACPI_MUTEX_DEBUG
|
||
|
|
{
|
||
|
|
u32 i;
|
||
|
|
/*
|
||
|
|
* Mutex debug code, for internal debugging only.
|
||
|
|
*
|
||
|
|
* Deadlock prevention. Check if this thread owns any mutexes of value
|
||
|
|
* greater than or equal to this one. If so, the thread has violated
|
||
|
|
* the mutex ordering rule. This indicates a coding error somewhere in
|
||
|
|
* the ACPI subsystem code.
|
||
|
|
*/
|
||
|
|
for (i = mutex_id; i < ACPI_NUM_MUTEX; i++) {
|
||
|
|
if (acpi_gbl_mutex_info[i].thread_id == this_thread_id) {
|
||
|
|
if (i == mutex_id) {
|
||
|
|
ACPI_ERROR((AE_INFO,
|
||
|
|
"Mutex [%s] already acquired by this thread [%u]",
|
||
|
|
acpi_ut_get_mutex_name
|
||
|
|
(mutex_id),
|
||
|
|
(u32)this_thread_id));
|
||
|
|
|
||
|
|
return (AE_ALREADY_ACQUIRED);
|
||
|
|
}
|
||
|
|
|
||
|
|
ACPI_ERROR((AE_INFO,
|
||
|
|
"Invalid acquire order: Thread %u owns [%s], wants [%s]",
|
||
|
|
(u32)this_thread_id,
|
||
|
|
acpi_ut_get_mutex_name(i),
|
||
|
|
acpi_ut_get_mutex_name(mutex_id)));
|
||
|
|
|
||
|
|
return (AE_ACQUIRE_DEADLOCK);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
|
||
|
|
"Thread %u attempting to acquire Mutex [%s]\n",
|
||
|
|
(u32)this_thread_id,
|
||
|
|
acpi_ut_get_mutex_name(mutex_id)));
|
||
|
|
|
||
|
|
status =
|
||
|
|
acpi_os_acquire_mutex(acpi_gbl_mutex_info[mutex_id].mutex,
|
||
|
|
ACPI_WAIT_FOREVER);
|
||
|
|
if (ACPI_SUCCESS(status)) {
|
||
|
|
ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
|
||
|
|
"Thread %u acquired Mutex [%s]\n",
|
||
|
|
(u32)this_thread_id,
|
||
|
|
acpi_ut_get_mutex_name(mutex_id)));
|
||
|
|
|
||
|
|
acpi_gbl_mutex_info[mutex_id].use_count++;
|
||
|
|
acpi_gbl_mutex_info[mutex_id].thread_id = this_thread_id;
|
||
|
|
} else {
|
||
|
|
ACPI_EXCEPTION((AE_INFO, status,
|
||
|
|
"Thread %u could not acquire Mutex [0x%X]",
|
||
|
|
(u32)this_thread_id, mutex_id));
|
||
|
|
}
|
||
|
|
|
||
|
|
return (status);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*******************************************************************************
|
||
|
|
*
|
||
|
|
* FUNCTION: acpi_ut_release_mutex
|
||
|
|
*
|
||
|
|
* PARAMETERS: mutex_ID - ID of the mutex to be released
|
||
|
|
*
|
||
|
|
* RETURN: Status
|
||
|
|
*
|
||
|
|
* DESCRIPTION: Release a mutex object.
|
||
|
|
*
|
||
|
|
******************************************************************************/
|
||
|
|
|
||
|
|
acpi_status acpi_ut_release_mutex(acpi_mutex_handle mutex_id)
|
||
|
|
{
|
||
|
|
ACPI_FUNCTION_NAME(ut_release_mutex);
|
||
|
|
|
||
|
|
ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Thread %u releasing Mutex [%s]\n",
|
||
|
|
(u32)acpi_os_get_thread_id(),
|
||
|
|
acpi_ut_get_mutex_name(mutex_id)));
|
||
|
|
|
||
|
|
if (mutex_id > ACPI_MAX_MUTEX) {
|
||
|
|
return (AE_BAD_PARAMETER);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Mutex must be acquired in order to release it!
|
||
|
|
*/
|
||
|
|
if (acpi_gbl_mutex_info[mutex_id].thread_id == ACPI_MUTEX_NOT_ACQUIRED) {
|
||
|
|
ACPI_ERROR((AE_INFO,
|
||
|
|
"Mutex [0x%X] is not acquired, cannot release",
|
||
|
|
mutex_id));
|
||
|
|
|
||
|
|
return (AE_NOT_ACQUIRED);
|
||
|
|
}
|
||
|
|
#ifdef ACPI_MUTEX_DEBUG
|
||
|
|
{
|
||
|
|
u32 i;
|
||
|
|
/*
|
||
|
|
* Mutex debug code, for internal debugging only.
|
||
|
|
*
|
||
|
|
* Deadlock prevention. Check if this thread owns any mutexes of value
|
||
|
|
* greater than this one. If so, the thread has violated the mutex
|
||
|
|
* ordering rule. This indicates a coding error somewhere in
|
||
|
|
* the ACPI subsystem code.
|
||
|
|
*/
|
||
|
|
for (i = mutex_id; i < ACPI_NUM_MUTEX; i++) {
|
||
|
|
if (acpi_gbl_mutex_info[i].thread_id ==
|
||
|
|
acpi_os_get_thread_id()) {
|
||
|
|
if (i == mutex_id) {
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
ACPI_ERROR((AE_INFO,
|
||
|
|
"Invalid release order: owns [%s], releasing [%s]",
|
||
|
|
acpi_ut_get_mutex_name(i),
|
||
|
|
acpi_ut_get_mutex_name(mutex_id)));
|
||
|
|
|
||
|
|
return (AE_RELEASE_DEADLOCK);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* Mark unlocked FIRST */
|
||
|
|
|
||
|
|
acpi_gbl_mutex_info[mutex_id].thread_id = ACPI_MUTEX_NOT_ACQUIRED;
|
||
|
|
|
||
|
|
acpi_os_release_mutex(acpi_gbl_mutex_info[mutex_id].mutex);
|
||
|
|
return (AE_OK);
|
||
|
|
}
|