freebsd-dev/sys/contrib/dev/acpica/utdelete.c
Mike Smith 0065eb1222 Import the 20010518 Intel ACPI CA release. Note that Intel's directory layout
keeps changing, so to reduce repository thrash everything has been moved into
a single directory.  (repo copy involved)
2001-05-29 19:52:40 +00:00

800 lines
23 KiB
C

/*******************************************************************************
*
* Module Name: utdelete - object deletion and reference count utilities
* $Revision: 71 $
*
******************************************************************************/
/******************************************************************************
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999, 2000, 2001, 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.
*
*****************************************************************************/
#define __UTDELETE_C__
#include "acpi.h"
#include "acinterp.h"
#include "acnamesp.h"
#include "actables.h"
#include "acparser.h"
#define _COMPONENT ACPI_UTILITIES
MODULE_NAME ("utdelete")
/*******************************************************************************
*
* FUNCTION: AcpiUtDeleteInternalObj
*
* PARAMETERS: *Object - Pointer to the list to be deleted
*
* RETURN: None
*
* DESCRIPTION: Low level object deletion, after reference counts have been
* updated (All reference counts, including sub-objects!)
*
******************************************************************************/
void
AcpiUtDeleteInternalObj (
ACPI_OPERAND_OBJECT *Object)
{
void *ObjPointer = NULL;
ACPI_OPERAND_OBJECT *HandlerDesc;
FUNCTION_TRACE_PTR ("UtDeleteInternalObj", Object);
if (!Object)
{
return_VOID;
}
/*
* Must delete or free any pointers within the object that are not
* actual ACPI objects (for example, a raw buffer pointer).
*/
switch (Object->Common.Type)
{
case ACPI_TYPE_STRING:
DEBUG_PRINTP (ACPI_INFO, ("**** String %p, ptr %p\n",
Object, Object->String.Pointer));
/* Free the actual string buffer */
ObjPointer = Object->String.Pointer;
break;
case ACPI_TYPE_BUFFER:
DEBUG_PRINTP (ACPI_INFO, ("**** Buffer %p, ptr %p\n",
Object, Object->Buffer.Pointer));
/* Free the actual buffer */
ObjPointer = Object->Buffer.Pointer;
break;
case ACPI_TYPE_PACKAGE:
DEBUG_PRINTP (ACPI_INFO, (" **** Package of count %X\n",
Object->Package.Count));
/*
* Elements of the package are not handled here, they are deleted
* separately
*/
/* Free the (variable length) element pointer array */
ObjPointer = Object->Package.Elements;
break;
case ACPI_TYPE_MUTEX:
DEBUG_PRINTP (ACPI_INFO, ("***** Mutex %p, Semaphore %p\n",
Object, Object->Mutex.Semaphore));
AcpiExUnlinkMutex (Object);
AcpiOsDeleteSemaphore (Object->Mutex.Semaphore);
break;
case ACPI_TYPE_EVENT:
DEBUG_PRINTP (ACPI_INFO, ("***** Event %p, Semaphore %p\n",
Object, Object->Event.Semaphore));
AcpiOsDeleteSemaphore (Object->Event.Semaphore);
Object->Event.Semaphore = NULL;
break;
case ACPI_TYPE_METHOD:
DEBUG_PRINTP (ACPI_INFO, ("***** Method %p\n", Object));
/* Delete the method semaphore if it exists */
if (Object->Method.Semaphore)
{
AcpiOsDeleteSemaphore (Object->Method.Semaphore);
Object->Method.Semaphore = NULL;
}
break;
case ACPI_TYPE_REGION:
DEBUG_PRINTP (ACPI_INFO, ("***** Region %p\n", Object));
if (Object->Region.Extra)
{
/*
* Free the RegionContext if and only if the handler is one of the
* default handlers -- and therefore, we created the context object
* locally, it was not created by an external caller.
*/
HandlerDesc = Object->Region.AddrHandler;
if ((HandlerDesc) &&
(HandlerDesc->AddrHandler.Hflags == ADDR_HANDLER_DEFAULT_INSTALLED))
{
ObjPointer = Object->Region.Extra->Extra.RegionContext;
}
/* Now we can free the Extra object */
AcpiUtDeleteObjectDesc (Object->Region.Extra);
}
break;
case ACPI_TYPE_BUFFER_FIELD:
DEBUG_PRINTP (ACPI_INFO, ("***** Buffer Field %p\n", Object));
if (Object->BufferField.Extra)
{
AcpiUtDeleteObjectDesc (Object->BufferField.Extra);
}
break;
default:
break;
}
/*
* Delete any allocated memory found above
*/
if (ObjPointer)
{
if (!AcpiTbSystemTablePointer (ObjPointer))
{
DEBUG_PRINTP (ACPI_INFO, ("Deleting Obj Ptr %p \n", ObjPointer));
AcpiUtFree (ObjPointer);
}
}
/* Only delete the object if it was dynamically allocated */
if (Object->Common.Flags & AOPOBJ_STATIC_ALLOCATION)
{
DEBUG_PRINTP (ACPI_INFO, ("Object %p [%s] static allocation, no delete\n",
Object, AcpiUtGetTypeName (Object->Common.Type)));
}
if (!(Object->Common.Flags & AOPOBJ_STATIC_ALLOCATION))
{
DEBUG_PRINTP (ACPI_INFO, ("Deleting object %p [%s]\n",
Object, AcpiUtGetTypeName (Object->Common.Type)));
AcpiUtDeleteObjectDesc (Object);
}
return_VOID;
}
/*******************************************************************************
*
* FUNCTION: AcpiUtDeleteInternalObjectList
*
* PARAMETERS: *ObjList - Pointer to the list to be deleted
*
* RETURN: Status - the status of the call
*
* DESCRIPTION: This function deletes an internal object list, including both
* simple objects and package objects
*
******************************************************************************/
ACPI_STATUS
AcpiUtDeleteInternalObjectList (
ACPI_OPERAND_OBJECT **ObjList)
{
ACPI_OPERAND_OBJECT **InternalObj;
FUNCTION_TRACE ("UtDeleteInternalObjectList");
/* Walk the null-terminated internal list */
for (InternalObj = ObjList; *InternalObj; InternalObj++)
{
/*
* Check for a package
* Simple objects are simply stored in the array and do not
* need to be deleted separately.
*/
if (IS_THIS_OBJECT_TYPE ((*InternalObj), ACPI_TYPE_PACKAGE))
{
/* Delete the package */
/*
* TBD: [Investigate] This might not be the right thing to do,
* depending on how the internal package object was allocated!!!
*/
AcpiUtDeleteInternalObj (*InternalObj);
}
}
/* Free the combined parameter pointer list and object array */
AcpiUtFree (ObjList);
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiUtUpdateRefCount
*
* PARAMETERS: *Object - Object whose ref count is to be updated
* Action - What to do
*
* RETURN: New ref count
*
* DESCRIPTION: Modify the ref count and return it.
*
******************************************************************************/
static void
AcpiUtUpdateRefCount (
ACPI_OPERAND_OBJECT *Object,
UINT32 Action)
{
UINT16 Count;
UINT16 NewCount;
PROC_NAME ("UtUpdateRefCount");
if (!Object)
{
return;
}
Count = Object->Common.ReferenceCount;
NewCount = Count;
/*
* Reference count action (increment, decrement, or force delete)
*/
switch (Action)
{
case REF_INCREMENT:
NewCount++;
Object->Common.ReferenceCount = NewCount;
DEBUG_PRINTP (ACPI_INFO, ("Obj %p Refs=%X, [Incremented]\n",
Object, NewCount));
break;
case REF_DECREMENT:
if (Count < 1)
{
DEBUG_PRINTP (ACPI_INFO, ("Obj %p Refs=%X, can't decrement! (Set to 0)\n",
Object, NewCount));
NewCount = 0;
}
else
{
NewCount--;
DEBUG_PRINTP (ACPI_INFO, ("Obj %p Refs=%X, [Decremented]\n",
Object, NewCount));
}
if (Object->Common.Type == ACPI_TYPE_METHOD)
{
DEBUG_PRINTP (ACPI_INFO, ("Method Obj %p Refs=%X, [Decremented]\n",
Object, NewCount));
}
Object->Common.ReferenceCount = NewCount;
if (NewCount == 0)
{
AcpiUtDeleteInternalObj (Object);
}
break;
case REF_FORCE_DELETE:
DEBUG_PRINTP (ACPI_INFO, ("Obj %p Refs=%X, Force delete! (Set to 0)\n",
Object, Count));
NewCount = 0;
Object->Common.ReferenceCount = NewCount;
AcpiUtDeleteInternalObj (Object);
break;
default:
DEBUG_PRINTP (ACPI_ERROR, ("Unknown action (%X)\n", Action));
break;
}
/*
* Sanity check the reference count, for debug purposes only.
* (A deleted object will have a huge reference count)
*/
if (Count > MAX_REFERENCE_COUNT)
{
DEBUG_PRINTP (ACPI_ERROR,
("**** AE_ERROR **** Invalid Reference Count (%X) in object %p\n\n",
Count, Object));
}
return;
}
/*******************************************************************************
*
* FUNCTION: AcpiUtUpdateObjectReference
*
* PARAMETERS: *Object - Increment ref count for this object
* and all sub-objects
* Action - Either REF_INCREMENT or REF_DECREMENT or
* REF_FORCE_DELETE
*
* RETURN: Status
*
* DESCRIPTION: Increment the object reference count
*
* Object references are incremented when:
* 1) An object is attached to a Node (namespace object)
* 2) An object is copied (all subobjects must be incremented)
*
* Object references are decremented when:
* 1) An object is detached from an Node
*
******************************************************************************/
ACPI_STATUS
AcpiUtUpdateObjectReference (
ACPI_OPERAND_OBJECT *Object,
UINT16 Action)
{
ACPI_STATUS Status;
UINT32 i;
ACPI_OPERAND_OBJECT *Next;
ACPI_OPERAND_OBJECT *New;
ACPI_GENERIC_STATE *StateList = NULL;
ACPI_GENERIC_STATE *State;
FUNCTION_TRACE_PTR ("UtUpdateObjectReference", Object);
/* Ignore a null object ptr */
if (!Object)
{
return_ACPI_STATUS (AE_OK);
}
/*
* Make sure that this isn't a namespace handle or an AML pointer
*/
if (VALID_DESCRIPTOR_TYPE (Object, ACPI_DESC_TYPE_NAMED))
{
DEBUG_PRINTP (ACPI_INFO, ("Object %p is NS handle\n", Object));
return_ACPI_STATUS (AE_OK);
}
if (AcpiTbSystemTablePointer (Object))
{
DEBUG_PRINTP (ACPI_INFO, ("**** Object %p is Pcode Ptr\n", Object));
return_ACPI_STATUS (AE_OK);
}
State = AcpiUtCreateUpdateState (Object, Action);
while (State)
{
Object = State->Update.Object;
Action = State->Update.Value;
AcpiUtDeleteGenericState (State);
/*
* All sub-objects must have their reference count incremented also.
* Different object types have different subobjects.
*/
switch (Object->Common.Type)
{
case ACPI_TYPE_DEVICE:
Status = AcpiUtCreateUpdateStateAndPush (Object->Device.AddrHandler,
Action, &StateList);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
AcpiUtUpdateRefCount (Object->Device.SysHandler, Action);
AcpiUtUpdateRefCount (Object->Device.DrvHandler, Action);
break;
case INTERNAL_TYPE_ADDRESS_HANDLER:
/* Must walk list of address handlers */
Next = Object->AddrHandler.Next;
while (Next)
{
New = Next->AddrHandler.Next;
AcpiUtUpdateRefCount (Next, Action);
Next = New;
}
break;
case ACPI_TYPE_PACKAGE:
/*
* We must update all the sub-objects of the package
* (Each of whom may have their own sub-objects, etc.
*/
for (i = 0; i < Object->Package.Count; i++)
{
/*
* Push each element onto the stack for later processing.
* Note: There can be null elements within the package,
* these are simply ignored
*/
Status = AcpiUtCreateUpdateStateAndPush (
Object->Package.Elements[i], Action, &StateList);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
}
break;
case ACPI_TYPE_BUFFER_FIELD:
Status = AcpiUtCreateUpdateStateAndPush (
Object->BufferField.BufferObj, Action, &StateList);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
break;
case INTERNAL_TYPE_REGION_FIELD:
Status = AcpiUtCreateUpdateStateAndPush (
Object->Field.RegionObj, Action, &StateList);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
break;
case INTERNAL_TYPE_BANK_FIELD:
Status = AcpiUtCreateUpdateStateAndPush (
Object->BankField.BankRegisterObj, Action, &StateList);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
Status = AcpiUtCreateUpdateStateAndPush (
Object->BankField.RegionObj, Action, &StateList);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
break;
case INTERNAL_TYPE_INDEX_FIELD:
Status = AcpiUtCreateUpdateStateAndPush (
Object->IndexField.IndexObj, Action, &StateList);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
Status = AcpiUtCreateUpdateStateAndPush (
Object->IndexField.DataObj, Action, &StateList);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
break;
case ACPI_TYPE_REGION:
/* TBD: [Investigate]
AcpiUtUpdateRefCount (Object->Region.AddrHandler, Action);
*/
/*
Status =
AcpiUtCreateUpdateStateAndPush (Object->Region.AddrHandler,
Action, &StateList);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
*/
break;
case INTERNAL_TYPE_REFERENCE:
break;
}
/*
* Now we can update the count in the main object. This can only
* happen after we update the sub-objects in case this causes the
* main object to be deleted.
*/
AcpiUtUpdateRefCount (Object, Action);
/* Move on to the next object to be updated */
State = AcpiUtPopGenericState (&StateList);
}
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiUtAddReference
*
* PARAMETERS: *Object - Object whose reference count is to be
* incremented
*
* RETURN: None
*
* DESCRIPTION: Add one reference to an ACPI object
*
******************************************************************************/
void
AcpiUtAddReference (
ACPI_OPERAND_OBJECT *Object)
{
FUNCTION_TRACE_PTR ("UtAddReference", Object);
/*
* Ensure that we have a valid object
*/
if (!AcpiUtValidInternalObject (Object))
{
return_VOID;
}
/*
* We have a valid ACPI internal object, now increment the reference count
*/
AcpiUtUpdateObjectReference (Object, REF_INCREMENT);
return_VOID;
}
/*******************************************************************************
*
* FUNCTION: AcpiUtRemoveReference
*
* PARAMETERS: *Object - Object whose ref count will be decremented
*
* RETURN: None
*
* DESCRIPTION: Decrement the reference count of an ACPI internal object
*
******************************************************************************/
void
AcpiUtRemoveReference (
ACPI_OPERAND_OBJECT *Object)
{
FUNCTION_TRACE_PTR ("UtRemoveReference", Object);
/*
* Ensure that we have a valid object
*/
if (!AcpiUtValidInternalObject (Object))
{
return_VOID;
}
DEBUG_PRINTP (ACPI_INFO, ("Obj %p Refs=%X\n",
Object, Object->Common.ReferenceCount));
/*
* Decrement the reference count, and only actually delete the object
* if the reference count becomes 0. (Must also decrement the ref count
* of all subobjects!)
*/
AcpiUtUpdateObjectReference (Object, REF_DECREMENT);
return_VOID;
}