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authorJung-uk Kim <jkim@FreeBSD.org>2012-02-16 00:24:10 +0000
committerJung-uk Kim <jkim@FreeBSD.org>2012-02-16 00:24:10 +0000
commit5437485bdb98c4b00f15969e013c454426e9c862 (patch)
tree71526afe7e3c45a4c88ba7b5d8d57d1e469feec2 /source/components/utilities/utmutex.c
parent234358d94982312d34c80b868fea481307fb3a48 (diff)
downloadsrc-5437485bdb98c4b00f15969e013c454426e9c862.tar.gz
src-5437485bdb98c4b00f15969e013c454426e9c862.zip
Import ACPICA 20120215.vendor/acpica/20120215
Notes
Notes: svn path=/vendor-sys/acpica/dist/; revision=231798 svn path=/vendor-sys/acpica/20120215/; revision=231799; tag=vendor/acpica/20120215
Diffstat (limited to 'source/components/utilities/utmutex.c')
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diff --git a/source/components/utilities/utmutex.c b/source/components/utilities/utmutex.c
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+/*******************************************************************************
+ *
+ * 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 "acpi.h"
+#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);
+}
+
+