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exconcat.c
(19.34 KB)
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exconfig.c
(24.66 KB)
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exconvrt.c
(27.7 KB)
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excreate.c
(21.48 KB)
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exdebug.c
(16.85 KB)
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exdump.c
(46.35 KB)
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exfield.c
(21.39 KB)
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exfldio.c
(38.52 KB)
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exmisc.c
(21.61 KB)
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exmutex.c
(23.35 KB)
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exnames.c
(19.39 KB)
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exoparg1.c
(40.23 KB)
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exoparg2.c
(23.96 KB)
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exoparg3.c
(15.57 KB)
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exoparg6.c
(17.06 KB)
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exprep.c
(27.95 KB)
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exregion.c
(24.02 KB)
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exresnte.c
(15.34 KB)
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exresolv.c
(23.43 KB)
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exresop.c
(28.1 KB)
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exserial.c
(18.81 KB)
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exstore.c
(26.31 KB)
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exstoren.c
(16.22 KB)
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exstorob.c
(13.74 KB)
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exsystem.c
(15.78 KB)
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extrace.c
(16.83 KB)
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exutils.c
(20.97 KB)
Editing: exmutex.c
/****************************************************************************** * * Module Name: exmutex - ASL Mutex Acquire/Release functions * *****************************************************************************/ /****************************************************************************** * * 1. Copyright Notice * * Some or all of this work - Copyright (c) 1999 - 2020, Intel Corp. * All rights reserved. * * 2. License * * 2.1. This is your license from Intel Corp. under its intellectual property * rights. You may have additional license terms from the party that provided * you this software, covering your right to use that party's intellectual * property rights. * * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a * copy of the source code appearing in this file ("Covered Code") an * irrevocable, perpetual, worldwide license under Intel's copyrights in the * base code distributed originally by Intel ("Original Intel Code") to copy, * make derivatives, distribute, use and display any portion of the Covered * Code in any form, with the right to sublicense such rights; and * * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent * license (with the right to sublicense), under only those claims of Intel * patents that are infringed by the Original Intel Code, to make, use, sell, * offer to sell, and import the Covered Code and derivative works thereof * solely to the minimum extent necessary to exercise the above copyright * license, and in no event shall the patent license extend to any additions * to or modifications of the Original Intel Code. No other license or right * is granted directly or by implication, estoppel or otherwise; * * The above copyright and patent license is granted only if the following * conditions are met: * * 3. Conditions * * 3.1. Redistribution of Source with Rights to Further Distribute Source. * Redistribution of source code of any substantial portion of the Covered * Code or modification with rights to further distribute source must include * the above Copyright Notice, the above License, this list of Conditions, * and the following Disclaimer and Export Compliance provision. In addition, * Licensee must cause all Covered Code to which Licensee contributes to * contain a file documenting the changes Licensee made to create that Covered * Code and the date of any change. Licensee must include in that file the * documentation of any changes made by any predecessor Licensee. Licensee * must include a prominent statement that the modification is derived, * directly or indirectly, from Original Intel Code. * * 3.2. Redistribution of Source with no Rights to Further Distribute Source. * Redistribution of source code of any substantial portion of the Covered * Code or modification without rights to further distribute source must * include the following Disclaimer and Export Compliance provision in the * documentation and/or other materials provided with distribution. In * addition, Licensee may not authorize further sublicense of source of any * portion of the Covered Code, and must include terms to the effect that the * license from Licensee to its licensee is limited to the intellectual * property embodied in the software Licensee provides to its licensee, and * not to intellectual property embodied in modifications its licensee may * make. * * 3.3. Redistribution of Executable. Redistribution in executable form of any * substantial portion of the Covered Code or modification must reproduce the * above Copyright Notice, and the following Disclaimer and Export Compliance * provision in the documentation and/or other materials provided with the * distribution. * * 3.4. Intel retains all right, title, and interest in and to the Original * Intel Code. * * 3.5. Neither the name Intel nor any other trademark owned or controlled by * Intel shall be used in advertising or otherwise to promote the sale, use or * other dealings in products derived from or relating to the Covered Code * without prior written authorization from Intel. * * 4. Disclaimer and Export Compliance * * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A * PARTICULAR PURPOSE. * * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY * LIMITED REMEDY. * * 4.3. Licensee shall not export, either directly or indirectly, any of this * software or system incorporating such software without first obtaining any * required license or other approval from the U. S. Department of Commerce or * any other agency or department of the United States Government. In the * event Licensee exports any such software from the United States or * re-exports any such software from a foreign destination, Licensee shall * ensure that the distribution and export/re-export of the software is in * compliance with all laws, regulations, orders, or other restrictions of the * U.S. Export Administration Regulations. Licensee agrees that neither it nor * any of its subsidiaries will export/re-export any technical data, process, * software, or service, directly or indirectly, to any country for which the * United States government or any agency thereof requires an export license, * other governmental approval, or letter of assurance, without first obtaining * such license, approval or letter. * ***************************************************************************** * * Alternatively, you may choose to be licensed under the terms of the * following license: * * 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. * * 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 MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * 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 DAMAGE. * * Alternatively, you may choose to be licensed under the terms of the * GNU General Public License ("GPL") version 2 as published by the Free * Software Foundation. * *****************************************************************************/ #include <contrib/dev/acpica/include/acpi.h> #include <contrib/dev/acpica/include/accommon.h> #include <contrib/dev/acpica/include/acinterp.h> #include <contrib/dev/acpica/include/acevents.h> #define _COMPONENT ACPI_EXECUTER ACPI_MODULE_NAME ("exmutex") /* Local prototypes */ static void AcpiExLinkMutex ( ACPI_OPERAND_OBJECT *ObjDesc, ACPI_THREAD_STATE *Thread); /******************************************************************************* * * FUNCTION: AcpiExUnlinkMutex * * PARAMETERS: ObjDesc - The mutex to be unlinked * * RETURN: None * * DESCRIPTION: Remove a mutex from the "AcquiredMutex" list * ******************************************************************************/ void AcpiExUnlinkMutex ( ACPI_OPERAND_OBJECT *ObjDesc) { ACPI_THREAD_STATE *Thread = ObjDesc->Mutex.OwnerThread; if (!Thread) { return; } /* Doubly linked list */ if (ObjDesc->Mutex.Next) { (ObjDesc->Mutex.Next)->Mutex.Prev = ObjDesc->Mutex.Prev; } if (ObjDesc->Mutex.Prev) { (ObjDesc->Mutex.Prev)->Mutex.Next = ObjDesc->Mutex.Next; /* * Migrate the previous sync level associated with this mutex to * the previous mutex on the list so that it may be preserved. * This handles the case where several mutexes have been acquired * at the same level, but are not released in opposite order. */ (ObjDesc->Mutex.Prev)->Mutex.OriginalSyncLevel = ObjDesc->Mutex.OriginalSyncLevel; } else { Thread->AcquiredMutexList = ObjDesc->Mutex.Next; } } /******************************************************************************* * * FUNCTION: AcpiExLinkMutex * * PARAMETERS: ObjDesc - The mutex to be linked * Thread - Current executing thread object * * RETURN: None * * DESCRIPTION: Add a mutex to the "AcquiredMutex" list for this walk * ******************************************************************************/ static void AcpiExLinkMutex ( ACPI_OPERAND_OBJECT *ObjDesc, ACPI_THREAD_STATE *Thread) { ACPI_OPERAND_OBJECT *ListHead; ListHead = Thread->AcquiredMutexList; /* This object will be the first object in the list */ ObjDesc->Mutex.Prev = NULL; ObjDesc->Mutex.Next = ListHead; /* Update old first object to point back to this object */ if (ListHead) { ListHead->Mutex.Prev = ObjDesc; } /* Update list head */ Thread->AcquiredMutexList = ObjDesc; } /******************************************************************************* * * FUNCTION: AcpiExAcquireMutexObject * * PARAMETERS: Timeout - Timeout in milliseconds * ObjDesc - Mutex object * ThreadId - Current thread state * * RETURN: Status * * DESCRIPTION: Acquire an AML mutex, low-level interface. Provides a common * path that supports multiple acquires by the same thread. * * MUTEX: Interpreter must be locked * * NOTE: This interface is called from three places: * 1) From AcpiExAcquireMutex, via an AML Acquire() operator * 2) From AcpiExAcquireGlobalLock when an AML Field access requires the * global lock * 3) From the external interface, AcpiAcquireGlobalLock * ******************************************************************************/ ACPI_STATUS AcpiExAcquireMutexObject ( UINT16 Timeout, ACPI_OPERAND_OBJECT *ObjDesc, ACPI_THREAD_ID ThreadId) { ACPI_STATUS Status; ACPI_FUNCTION_TRACE_PTR (ExAcquireMutexObject, ObjDesc); if (!ObjDesc) { return_ACPI_STATUS (AE_BAD_PARAMETER); } /* Support for multiple acquires by the owning thread */ if (ObjDesc->Mutex.ThreadId == ThreadId) { /* * The mutex is already owned by this thread, just increment the * acquisition depth */ ObjDesc->Mutex.AcquisitionDepth++; return_ACPI_STATUS (AE_OK); } /* Acquire the mutex, wait if necessary. Special case for Global Lock */ if (ObjDesc == AcpiGbl_GlobalLockMutex) { Status = AcpiEvAcquireGlobalLock (Timeout); } else { Status = AcpiExSystemWaitMutex (ObjDesc->Mutex.OsMutex, Timeout); } if (ACPI_FAILURE (Status)) { /* Includes failure from a timeout on TimeDesc */ return_ACPI_STATUS (Status); } /* Acquired the mutex: update mutex object */ ObjDesc->Mutex.ThreadId = ThreadId; ObjDesc->Mutex.AcquisitionDepth = 1; ObjDesc->Mutex.OriginalSyncLevel = 0; ObjDesc->Mutex.OwnerThread = NULL; /* Used only for AML Acquire() */ return_ACPI_STATUS (AE_OK); } /******************************************************************************* * * FUNCTION: AcpiExAcquireMutex * * PARAMETERS: TimeDesc - Timeout integer * ObjDesc - Mutex object * WalkState - Current method execution state * * RETURN: Status * * DESCRIPTION: Acquire an AML mutex * ******************************************************************************/ ACPI_STATUS AcpiExAcquireMutex ( ACPI_OPERAND_OBJECT *TimeDesc, ACPI_OPERAND_OBJECT *ObjDesc, ACPI_WALK_STATE *WalkState) { ACPI_STATUS Status; ACPI_FUNCTION_TRACE_PTR (ExAcquireMutex, ObjDesc); if (!ObjDesc) { return_ACPI_STATUS (AE_BAD_PARAMETER); } /* Must have a valid thread state struct */ if (!WalkState->Thread) { ACPI_ERROR ((AE_INFO, "Cannot acquire Mutex [%4.4s], null thread info", AcpiUtGetNodeName (ObjDesc->Mutex.Node))); return_ACPI_STATUS (AE_AML_INTERNAL); } /* * Current sync level must be less than or equal to the sync level * of the mutex. This mechanism provides some deadlock prevention. */ if (WalkState->Thread->CurrentSyncLevel > ObjDesc->Mutex.SyncLevel) { ACPI_ERROR ((AE_INFO, "Cannot acquire Mutex [%4.4s], " "current SyncLevel is too large (%u)", AcpiUtGetNodeName (ObjDesc->Mutex.Node), WalkState->Thread->CurrentSyncLevel)); return_ACPI_STATUS (AE_AML_MUTEX_ORDER); } ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Acquiring: Mutex SyncLevel %u, Thread SyncLevel %u, " "Depth %u TID %p\n", ObjDesc->Mutex.SyncLevel, WalkState->Thread->CurrentSyncLevel, ObjDesc->Mutex.AcquisitionDepth, WalkState->Thread)); Status = AcpiExAcquireMutexObject ((UINT16) TimeDesc->Integer.Value, ObjDesc, WalkState->Thread->ThreadId); if (ACPI_SUCCESS (Status) && ObjDesc->Mutex.AcquisitionDepth == 1) { /* Save Thread object, original/current sync levels */ ObjDesc->Mutex.OwnerThread = WalkState->Thread; ObjDesc->Mutex.OriginalSyncLevel = WalkState->Thread->CurrentSyncLevel; WalkState->Thread->CurrentSyncLevel = ObjDesc->Mutex.SyncLevel; /* Link the mutex to the current thread for force-unlock at method exit */ AcpiExLinkMutex (ObjDesc, WalkState->Thread); } ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Acquired: Mutex SyncLevel %u, Thread SyncLevel %u, Depth %u\n", ObjDesc->Mutex.SyncLevel, WalkState->Thread->CurrentSyncLevel, ObjDesc->Mutex.AcquisitionDepth)); return_ACPI_STATUS (Status); } /******************************************************************************* * * FUNCTION: AcpiExReleaseMutexObject * * PARAMETERS: ObjDesc - The object descriptor for this op * * RETURN: Status * * DESCRIPTION: Release a previously acquired Mutex, low level interface. * Provides a common path that supports multiple releases (after * previous multiple acquires) by the same thread. * * MUTEX: Interpreter must be locked * * NOTE: This interface is called from three places: * 1) From AcpiExReleaseMutex, via an AML Acquire() operator * 2) From AcpiExReleaseGlobalLock when an AML Field access requires the * global lock * 3) From the external interface, AcpiReleaseGlobalLock * ******************************************************************************/ ACPI_STATUS AcpiExReleaseMutexObject ( ACPI_OPERAND_OBJECT *ObjDesc) { ACPI_STATUS Status = AE_OK; ACPI_FUNCTION_TRACE (ExReleaseMutexObject); if (ObjDesc->Mutex.AcquisitionDepth == 0) { return_ACPI_STATUS (AE_NOT_ACQUIRED); } /* Match multiple Acquires with multiple Releases */ ObjDesc->Mutex.AcquisitionDepth--; if (ObjDesc->Mutex.AcquisitionDepth != 0) { /* Just decrement the depth and return */ return_ACPI_STATUS (AE_OK); } if (ObjDesc->Mutex.OwnerThread) { /* Unlink the mutex from the owner's list */ AcpiExUnlinkMutex (ObjDesc); ObjDesc->Mutex.OwnerThread = NULL; } /* Release the mutex, special case for Global Lock */ if (ObjDesc == AcpiGbl_GlobalLockMutex) { Status = AcpiEvReleaseGlobalLock (); } else { AcpiOsReleaseMutex (ObjDesc->Mutex.OsMutex); } /* Clear mutex info */ ObjDesc->Mutex.ThreadId = 0; return_ACPI_STATUS (Status); } /******************************************************************************* * * FUNCTION: AcpiExReleaseMutex * * PARAMETERS: ObjDesc - The object descriptor for this op * WalkState - Current method execution state * * RETURN: Status * * DESCRIPTION: Release a previously acquired Mutex. * ******************************************************************************/ ACPI_STATUS AcpiExReleaseMutex ( ACPI_OPERAND_OBJECT *ObjDesc, ACPI_WALK_STATE *WalkState) { UINT8 PreviousSyncLevel; ACPI_THREAD_STATE *OwnerThread; ACPI_STATUS Status = AE_OK; ACPI_FUNCTION_TRACE (ExReleaseMutex); if (!ObjDesc) { return_ACPI_STATUS (AE_BAD_PARAMETER); } OwnerThread = ObjDesc->Mutex.OwnerThread; /* The mutex must have been previously acquired in order to release it */ if (!OwnerThread) { ACPI_ERROR ((AE_INFO, "Cannot release Mutex [%4.4s], not acquired", AcpiUtGetNodeName (ObjDesc->Mutex.Node))); return_ACPI_STATUS (AE_AML_MUTEX_NOT_ACQUIRED); } /* Must have a valid thread ID */ if (!WalkState->Thread) { ACPI_ERROR ((AE_INFO, "Cannot release Mutex [%4.4s], null thread info", AcpiUtGetNodeName (ObjDesc->Mutex.Node))); return_ACPI_STATUS (AE_AML_INTERNAL); } /* * The Mutex is owned, but this thread must be the owner. * Special case for Global Lock, any thread can release */ if ((OwnerThread->ThreadId != WalkState->Thread->ThreadId) && (ObjDesc != AcpiGbl_GlobalLockMutex)) { ACPI_ERROR ((AE_INFO, "Thread %u cannot release Mutex [%4.4s] acquired by thread %u", (UINT32) WalkState->Thread->ThreadId, AcpiUtGetNodeName (ObjDesc->Mutex.Node), (UINT32) OwnerThread->ThreadId)); return_ACPI_STATUS (AE_AML_NOT_OWNER); } /* * The sync level of the mutex must be equal to the current sync level. In * other words, the current level means that at least one mutex at that * level is currently being held. Attempting to release a mutex of a * different level can only mean that the mutex ordering rule is being * violated. This behavior is clarified in ACPI 4.0 specification. */ if (ObjDesc->Mutex.SyncLevel != OwnerThread->CurrentSyncLevel) { ACPI_ERROR ((AE_INFO, "Cannot release Mutex [%4.4s], SyncLevel mismatch: " "mutex %u current %u", AcpiUtGetNodeName (ObjDesc->Mutex.Node), ObjDesc->Mutex.SyncLevel, WalkState->Thread->CurrentSyncLevel)); return_ACPI_STATUS (AE_AML_MUTEX_ORDER); } /* * Get the previous SyncLevel from the head of the acquired mutex list. * This handles the case where several mutexes at the same level have been * acquired, but are not released in reverse order. */ PreviousSyncLevel = OwnerThread->AcquiredMutexList->Mutex.OriginalSyncLevel; ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Releasing: Object SyncLevel %u, Thread SyncLevel %u, " "Prev SyncLevel %u, Depth %u TID %p\n", ObjDesc->Mutex.SyncLevel, WalkState->Thread->CurrentSyncLevel, PreviousSyncLevel, ObjDesc->Mutex.AcquisitionDepth, WalkState->Thread)); Status = AcpiExReleaseMutexObject (ObjDesc); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } if (ObjDesc->Mutex.AcquisitionDepth == 0) { /* Restore the previous SyncLevel */ OwnerThread->CurrentSyncLevel = PreviousSyncLevel; } ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Released: Object SyncLevel %u, Thread SyncLevel, %u, " "Prev SyncLevel %u, Depth %u\n", ObjDesc->Mutex.SyncLevel, WalkState->Thread->CurrentSyncLevel, PreviousSyncLevel, ObjDesc->Mutex.AcquisitionDepth)); return_ACPI_STATUS (Status); } /******************************************************************************* * * FUNCTION: AcpiExReleaseAllMutexes * * PARAMETERS: Thread - Current executing thread object * * RETURN: Status * * DESCRIPTION: Release all mutexes held by this thread * * NOTE: This function is called as the thread is exiting the interpreter. * Mutexes are not released when an individual control method is exited, but * only when the parent thread actually exits the interpreter. This allows one * method to acquire a mutex, and a different method to release it, as long as * this is performed underneath a single parent control method. * ******************************************************************************/ void AcpiExReleaseAllMutexes ( ACPI_THREAD_STATE *Thread) { ACPI_OPERAND_OBJECT *Next = Thread->AcquiredMutexList; ACPI_OPERAND_OBJECT *ObjDesc; ACPI_FUNCTION_TRACE (ExReleaseAllMutexes); /* Traverse the list of owned mutexes, releasing each one */ while (Next) { ObjDesc = Next; ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Mutex [%4.4s] force-release, SyncLevel %u Depth %u\n", ObjDesc->Mutex.Node->Name.Ascii, ObjDesc->Mutex.SyncLevel, ObjDesc->Mutex.AcquisitionDepth)); /* Release the mutex, special case for Global Lock */ if (ObjDesc == AcpiGbl_GlobalLockMutex) { /* Ignore errors */ (void) AcpiEvReleaseGlobalLock (); } else { AcpiOsReleaseMutex (ObjDesc->Mutex.OsMutex); } /* Update Thread SyncLevel (Last mutex is the important one) */ Thread->CurrentSyncLevel = ObjDesc->Mutex.OriginalSyncLevel; /* Mark mutex unowned */ Next = ObjDesc->Mutex.Next; ObjDesc->Mutex.Prev = NULL; ObjDesc->Mutex.Next = NULL; ObjDesc->Mutex.AcquisitionDepth = 0; ObjDesc->Mutex.OwnerThread = NULL; ObjDesc->Mutex.ThreadId = 0; } return_VOID; }
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