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Diffstat (limited to 'drivers/acpi/utilities/utmutex.c')
| -rw-r--r-- | drivers/acpi/utilities/utmutex.c | 341 |
1 files changed, 0 insertions, 341 deletions
diff --git a/drivers/acpi/utilities/utmutex.c b/drivers/acpi/utilities/utmutex.c deleted file mode 100644 index 7331dde9e1b3..000000000000 --- a/drivers/acpi/utilities/utmutex.c +++ /dev/null @@ -1,341 +0,0 @@ -/******************************************************************************* - * - * Module Name: utmutex - local mutex support - * - ******************************************************************************/ - -/* - * Copyright (C) 2000 - 2008, 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> - -#define _COMPONENT ACPI_UTILITIES -ACPI_MODULE_NAME("utmutex") - -/* Local prototypes */ -static acpi_status acpi_ut_create_mutex(acpi_mutex_handle mutex_id); - -static acpi_status acpi_ut_delete_mutex(acpi_mutex_handle mutex_id); - -/******************************************************************************* - * - * FUNCTION: acpi_ut_mutex_initialize - * - * PARAMETERS: None. - * - * RETURN: Status - * - * DESCRIPTION: Create the system mutex objects. - * - ******************************************************************************/ - -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 */ - - spin_lock_init(acpi_gbl_gpe_lock); - spin_lock_init(acpi_gbl_hardware_lock); - - return_ACPI_STATUS(status); -} - -/******************************************************************************* - * - * FUNCTION: acpi_ut_mutex_terminate - * - * PARAMETERS: None. - * - * RETURN: None. - * - * DESCRIPTION: Delete all of the system mutex objects. - * - ******************************************************************************/ - -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++) { - (void)acpi_ut_delete_mutex(i); - } - - /* Delete the spinlocks */ - - acpi_os_delete_lock(acpi_gbl_gpe_lock); - acpi_os_delete_lock(acpi_gbl_hardware_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 (mutex_id > ACPI_MAX_MUTEX) { - return_ACPI_STATUS(AE_BAD_PARAMETER); - } - - 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 acpi_status acpi_ut_delete_mutex(acpi_mutex_handle mutex_id) -{ - - ACPI_FUNCTION_TRACE_U32(ut_delete_mutex, mutex_id); - - if (mutex_id > ACPI_MAX_MUTEX) { - return_ACPI_STATUS(AE_BAD_PARAMETER); - } - - 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_ACPI_STATUS(AE_OK); -} - -/******************************************************************************* - * - * 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 [%X]", - acpi_ut_get_mutex_name - (mutex_id), - this_thread_id)); - - return (AE_ALREADY_ACQUIRED); - } - - ACPI_ERROR((AE_INFO, - "Invalid acquire order: Thread %X owns [%s], wants [%s]", - 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 %lX attempting to acquire Mutex [%s]\n", - (unsigned long)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 %lX acquired Mutex [%s]\n", - (unsigned long)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 %lX could not acquire Mutex [%X]", - (unsigned long)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_thread_id this_thread_id; - - ACPI_FUNCTION_NAME(ut_release_mutex); - - this_thread_id = acpi_os_get_thread_id(); - ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, - "Thread %lX releasing Mutex [%s]\n", - (unsigned long)this_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 [%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 == this_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); -} |