diff options
Diffstat (limited to 'sys/contrib/dev/acpica/components/utilities/utmutex.c')
| -rw-r--r-- | sys/contrib/dev/acpica/components/utilities/utmutex.c | 397 |
1 files changed, 397 insertions, 0 deletions
diff --git a/sys/contrib/dev/acpica/components/utilities/utmutex.c b/sys/contrib/dev/acpica/components/utilities/utmutex.c new file mode 100644 index 0000000..2991c2e --- /dev/null +++ b/sys/contrib/dev/acpica/components/utilities/utmutex.c @@ -0,0 +1,397 @@ +/******************************************************************************* + * + * Module Name: utmutex - local mutex support + * + ******************************************************************************/ + +/* + * Copyright (C) 2000 - 2012, 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 __UTMUTEX_C__ + +#include <contrib/dev/acpica/include/acpi.h> +#include <contrib/dev/acpica/include/accommon.h> + +#define _COMPONENT ACPI_UTILITIES + ACPI_MODULE_NAME ("utmutex") + +/* Local prototypes */ + +static ACPI_STATUS +AcpiUtCreateMutex ( + ACPI_MUTEX_HANDLE MutexId); + +static void +AcpiUtDeleteMutex ( + ACPI_MUTEX_HANDLE MutexId); + + +/******************************************************************************* + * + * FUNCTION: AcpiUtMutexInitialize + * + * PARAMETERS: None. + * + * RETURN: Status + * + * DESCRIPTION: Create the system mutex objects. This includes mutexes, + * spin locks, and reader/writer locks. + * + ******************************************************************************/ + +ACPI_STATUS +AcpiUtMutexInitialize ( + void) +{ + UINT32 i; + ACPI_STATUS Status; + + + ACPI_FUNCTION_TRACE (UtMutexInitialize); + + + /* Create each of the predefined mutex objects */ + + for (i = 0; i < ACPI_NUM_MUTEX; i++) + { + Status = AcpiUtCreateMutex (i); + if (ACPI_FAILURE (Status)) + { + return_ACPI_STATUS (Status); + } + } + + /* Create the spinlocks for use at interrupt level */ + + Status = AcpiOsCreateLock (&AcpiGbl_GpeLock); + if (ACPI_FAILURE (Status)) + { + return_ACPI_STATUS (Status); + } + + Status = AcpiOsCreateLock (&AcpiGbl_HardwareLock); + if (ACPI_FAILURE (Status)) + { + return_ACPI_STATUS (Status); + } + + /* Mutex for _OSI support */ + Status = AcpiOsCreateMutex (&AcpiGbl_OsiMutex); + if (ACPI_FAILURE (Status)) + { + return_ACPI_STATUS (Status); + } + + /* Create the reader/writer lock for namespace access */ + + Status = AcpiUtCreateRwLock (&AcpiGbl_NamespaceRwLock); + return_ACPI_STATUS (Status); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiUtMutexTerminate + * + * PARAMETERS: None. + * + * RETURN: None. + * + * DESCRIPTION: Delete all of the system mutex objects. This includes mutexes, + * spin locks, and reader/writer locks. + * + ******************************************************************************/ + +void +AcpiUtMutexTerminate ( + void) +{ + UINT32 i; + + + ACPI_FUNCTION_TRACE (UtMutexTerminate); + + + /* Delete each predefined mutex object */ + + for (i = 0; i < ACPI_NUM_MUTEX; i++) + { + AcpiUtDeleteMutex (i); + } + + AcpiOsDeleteMutex (AcpiGbl_OsiMutex); + + /* Delete the spinlocks */ + + AcpiOsDeleteLock (AcpiGbl_GpeLock); + AcpiOsDeleteLock (AcpiGbl_HardwareLock); + + /* Delete the reader/writer lock */ + + AcpiUtDeleteRwLock (&AcpiGbl_NamespaceRwLock); + return_VOID; +} + + +/******************************************************************************* + * + * FUNCTION: AcpiUtCreateMutex + * + * PARAMETERS: MutexID - ID of the mutex to be created + * + * RETURN: Status + * + * DESCRIPTION: Create a mutex object. + * + ******************************************************************************/ + +static ACPI_STATUS +AcpiUtCreateMutex ( + ACPI_MUTEX_HANDLE MutexId) +{ + ACPI_STATUS Status = AE_OK; + + + ACPI_FUNCTION_TRACE_U32 (UtCreateMutex, MutexId); + + + if (!AcpiGbl_MutexInfo[MutexId].Mutex) + { + Status = AcpiOsCreateMutex (&AcpiGbl_MutexInfo[MutexId].Mutex); + AcpiGbl_MutexInfo[MutexId].ThreadId = ACPI_MUTEX_NOT_ACQUIRED; + AcpiGbl_MutexInfo[MutexId].UseCount = 0; + } + + return_ACPI_STATUS (Status); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiUtDeleteMutex + * + * PARAMETERS: MutexID - ID of the mutex to be deleted + * + * RETURN: Status + * + * DESCRIPTION: Delete a mutex object. + * + ******************************************************************************/ + +static void +AcpiUtDeleteMutex ( + ACPI_MUTEX_HANDLE MutexId) +{ + + ACPI_FUNCTION_TRACE_U32 (UtDeleteMutex, MutexId); + + + AcpiOsDeleteMutex (AcpiGbl_MutexInfo[MutexId].Mutex); + + AcpiGbl_MutexInfo[MutexId].Mutex = NULL; + AcpiGbl_MutexInfo[MutexId].ThreadId = ACPI_MUTEX_NOT_ACQUIRED; +} + + +/******************************************************************************* + * + * FUNCTION: AcpiUtAcquireMutex + * + * PARAMETERS: MutexID - ID of the mutex to be acquired + * + * RETURN: Status + * + * DESCRIPTION: Acquire a mutex object. + * + ******************************************************************************/ + +ACPI_STATUS +AcpiUtAcquireMutex ( + ACPI_MUTEX_HANDLE MutexId) +{ + ACPI_STATUS Status; + ACPI_THREAD_ID ThisThreadId; + + + ACPI_FUNCTION_NAME (UtAcquireMutex); + + + if (MutexId > ACPI_MAX_MUTEX) + { + return (AE_BAD_PARAMETER); + } + + ThisThreadId = AcpiOsGetThreadId (); + +#ifdef ACPI_MUTEX_DEBUG + { + UINT32 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 = MutexId; i < ACPI_NUM_MUTEX; i++) + { + if (AcpiGbl_MutexInfo[i].ThreadId == ThisThreadId) + { + if (i == MutexId) + { + ACPI_ERROR ((AE_INFO, + "Mutex [%s] already acquired by this thread [%u]", + AcpiUtGetMutexName (MutexId), + (UINT32) ThisThreadId)); + + return (AE_ALREADY_ACQUIRED); + } + + ACPI_ERROR ((AE_INFO, + "Invalid acquire order: Thread %u owns [%s], wants [%s]", + (UINT32) ThisThreadId, AcpiUtGetMutexName (i), + AcpiUtGetMutexName (MutexId))); + + return (AE_ACQUIRE_DEADLOCK); + } + } + } +#endif + + ACPI_DEBUG_PRINT ((ACPI_DB_MUTEX, + "Thread %u attempting to acquire Mutex [%s]\n", + (UINT32) ThisThreadId, AcpiUtGetMutexName (MutexId))); + + Status = AcpiOsAcquireMutex (AcpiGbl_MutexInfo[MutexId].Mutex, + ACPI_WAIT_FOREVER); + if (ACPI_SUCCESS (Status)) + { + ACPI_DEBUG_PRINT ((ACPI_DB_MUTEX, "Thread %u acquired Mutex [%s]\n", + (UINT32) ThisThreadId, AcpiUtGetMutexName (MutexId))); + + AcpiGbl_MutexInfo[MutexId].UseCount++; + AcpiGbl_MutexInfo[MutexId].ThreadId = ThisThreadId; + } + else + { + ACPI_EXCEPTION ((AE_INFO, Status, + "Thread %u could not acquire Mutex [0x%X]", + (UINT32) ThisThreadId, MutexId)); + } + + return (Status); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiUtReleaseMutex + * + * PARAMETERS: MutexID - ID of the mutex to be released + * + * RETURN: Status + * + * DESCRIPTION: Release a mutex object. + * + ******************************************************************************/ + +ACPI_STATUS +AcpiUtReleaseMutex ( + ACPI_MUTEX_HANDLE MutexId) +{ + ACPI_FUNCTION_NAME (UtReleaseMutex); + + ACPI_DEBUG_PRINT ((ACPI_DB_MUTEX, "Thread %u releasing Mutex [%s]\n", + (UINT32) AcpiOsGetThreadId (), AcpiUtGetMutexName (MutexId))); + + if (MutexId > ACPI_MAX_MUTEX) + { + return (AE_BAD_PARAMETER); + } + + /* + * Mutex must be acquired in order to release it! + */ + if (AcpiGbl_MutexInfo[MutexId].ThreadId == ACPI_MUTEX_NOT_ACQUIRED) + { + ACPI_ERROR ((AE_INFO, + "Mutex [0x%X] is not acquired, cannot release", MutexId)); + + return (AE_NOT_ACQUIRED); + } + +#ifdef ACPI_MUTEX_DEBUG + { + UINT32 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 = MutexId; i < ACPI_NUM_MUTEX; i++) + { + if (AcpiGbl_MutexInfo[i].ThreadId == AcpiOsGetThreadId ()) + { + if (i == MutexId) + { + continue; + } + + ACPI_ERROR ((AE_INFO, + "Invalid release order: owns [%s], releasing [%s]", + AcpiUtGetMutexName (i), AcpiUtGetMutexName (MutexId))); + + return (AE_RELEASE_DEADLOCK); + } + } + } +#endif + + /* Mark unlocked FIRST */ + + AcpiGbl_MutexInfo[MutexId].ThreadId = ACPI_MUTEX_NOT_ACQUIRED; + + AcpiOsReleaseMutex (AcpiGbl_MutexInfo[MutexId].Mutex); + return (AE_OK); +} + + |
