853 lines
27 KiB
C
853 lines
27 KiB
C
/*******************************************************************************
|
|
*
|
|
* Module Name: nsxfobj - Public interfaces to the ACPI subsystem
|
|
* ACPI Object oriented interfaces
|
|
* $Revision: 80 $
|
|
*
|
|
******************************************************************************/
|
|
|
|
/******************************************************************************
|
|
*
|
|
* 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 __NSXFOBJ_C__
|
|
|
|
#include "acpi.h"
|
|
#include "acinterp.h"
|
|
#include "acnamesp.h"
|
|
#include "acdispat.h"
|
|
|
|
|
|
#define _COMPONENT NAMESPACE
|
|
MODULE_NAME ("nsxfobj")
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiEvaluateObject
|
|
*
|
|
* PARAMETERS: Handle - Object handle (optional)
|
|
* *Pathname - Object pathname (optional)
|
|
* **Params - List of parameters to pass to
|
|
* method, terminated by NULL.
|
|
* Params itself may be NULL
|
|
* if no parameters are being
|
|
* passed.
|
|
* *ReturnObject - Where to put method's return value (if
|
|
* any). If NULL, no value is returned.
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Find and evaluate the given object, passing the given
|
|
* parameters if necessary. One of "Handle" or "Pathname" must
|
|
* be valid (non-null)
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiEvaluateObject (
|
|
ACPI_HANDLE Handle,
|
|
ACPI_STRING Pathname,
|
|
ACPI_OBJECT_LIST *ParamObjects,
|
|
ACPI_BUFFER *ReturnBuffer)
|
|
{
|
|
ACPI_STATUS Status;
|
|
ACPI_OPERAND_OBJECT **ParamPtr = NULL;
|
|
ACPI_OPERAND_OBJECT *ReturnObj = NULL;
|
|
ACPI_OPERAND_OBJECT *ObjectPtr = NULL;
|
|
UINT32 BufferSpaceNeeded;
|
|
UINT32 UserBufferLength;
|
|
UINT32 Count;
|
|
UINT32 i;
|
|
UINT32 ParamLength;
|
|
UINT32 ObjectLength;
|
|
|
|
|
|
FUNCTION_TRACE ("AcpiEvaluateObject");
|
|
|
|
|
|
/*
|
|
* If there are parameters to be passed to the object
|
|
* (which must be a control method), the external objects
|
|
* must be converted to internal objects
|
|
*/
|
|
|
|
if (ParamObjects && ParamObjects->Count)
|
|
{
|
|
/*
|
|
* Allocate a new parameter block for the internal objects
|
|
* Add 1 to count to allow for null terminated internal list
|
|
*/
|
|
|
|
Count = ParamObjects->Count;
|
|
ParamLength = (Count + 1) * sizeof (void *);
|
|
ObjectLength = Count * sizeof (ACPI_OPERAND_OBJECT);
|
|
|
|
ParamPtr = AcpiCmCallocate (ParamLength + /* Parameter List part */
|
|
ObjectLength); /* Actual objects */
|
|
if (!ParamPtr)
|
|
{
|
|
return_ACPI_STATUS (AE_NO_MEMORY);
|
|
}
|
|
|
|
ObjectPtr = (ACPI_OPERAND_OBJECT *) ((UINT8 *) ParamPtr +
|
|
ParamLength);
|
|
|
|
/*
|
|
* Init the param array of pointers and NULL terminate
|
|
* the list
|
|
*/
|
|
|
|
for (i = 0; i < Count; i++)
|
|
{
|
|
ParamPtr[i] = &ObjectPtr[i];
|
|
AcpiCmInitStaticObject (&ObjectPtr[i]);
|
|
}
|
|
ParamPtr[Count] = NULL;
|
|
|
|
/*
|
|
* Convert each external object in the list to an
|
|
* internal object
|
|
*/
|
|
for (i = 0; i < Count; i++)
|
|
{
|
|
Status = AcpiCmCopyEobjectToIobject (&ParamObjects->Pointer[i],
|
|
ParamPtr[i]);
|
|
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
AcpiCmDeleteInternalObjectList (ParamPtr);
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Three major cases:
|
|
* 1) Fully qualified pathname
|
|
* 2) No handle, not fully qualified pathname (error)
|
|
* 3) Valid handle
|
|
*/
|
|
|
|
if ((Pathname) &&
|
|
(AcpiNsValidRootPrefix (Pathname[0])))
|
|
{
|
|
/*
|
|
* The path is fully qualified, just evaluate by name
|
|
*/
|
|
Status = AcpiNsEvaluateByName (Pathname, ParamPtr, &ReturnObj);
|
|
}
|
|
|
|
else if (!Handle)
|
|
{
|
|
/*
|
|
* A handle is optional iff a fully qualified pathname
|
|
* is specified. Since we've already handled fully
|
|
* qualified names above, this is an error
|
|
*/
|
|
|
|
if (!Pathname)
|
|
{
|
|
DEBUG_PRINT (ACPI_ERROR,
|
|
("AcpiEvaluateObject: Both Handle and Pathname are NULL\n"));
|
|
}
|
|
|
|
else
|
|
{
|
|
DEBUG_PRINT (ACPI_ERROR,
|
|
("AcpiEvaluateObject: Handle is NULL and Pathname is relative\n"));
|
|
}
|
|
|
|
Status = AE_BAD_PARAMETER;
|
|
}
|
|
|
|
else
|
|
{
|
|
/*
|
|
* We get here if we have a handle -- and if we have a
|
|
* pathname it is relative. The handle will be validated
|
|
* in the lower procedures
|
|
*/
|
|
|
|
if (!Pathname)
|
|
{
|
|
/*
|
|
* The null pathname case means the handle is for
|
|
* the actual object to be evaluated
|
|
*/
|
|
Status = AcpiNsEvaluateByHandle (Handle, ParamPtr, &ReturnObj);
|
|
}
|
|
|
|
else
|
|
{
|
|
/*
|
|
* Both a Handle and a relative Pathname
|
|
*/
|
|
Status = AcpiNsEvaluateRelative (Handle, Pathname, ParamPtr,
|
|
&ReturnObj);
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* If we are expecting a return value, and all went well above,
|
|
* copy the return value to an external object.
|
|
*/
|
|
|
|
if (ReturnBuffer)
|
|
{
|
|
UserBufferLength = ReturnBuffer->Length;
|
|
ReturnBuffer->Length = 0;
|
|
|
|
if (ReturnObj)
|
|
{
|
|
if (VALID_DESCRIPTOR_TYPE (ReturnObj, ACPI_DESC_TYPE_NAMED))
|
|
{
|
|
/*
|
|
* If we got an Node as a return object,
|
|
* this means the object we are evaluating
|
|
* has nothing interesting to return (such
|
|
* as a mutex, etc.) We return an error
|
|
* because these types are essentially
|
|
* unsupported by this interface. We
|
|
* don't check up front because this makes
|
|
* it easier to add support for various
|
|
* types at a later date if necessary.
|
|
*/
|
|
Status = AE_TYPE;
|
|
ReturnObj = NULL; /* No need to delete an Node */
|
|
}
|
|
|
|
if (ACPI_SUCCESS (Status))
|
|
{
|
|
/*
|
|
* Find out how large a buffer is needed
|
|
* to contain the returned object
|
|
*/
|
|
Status = AcpiCmGetObjectSize (ReturnObj,
|
|
&BufferSpaceNeeded);
|
|
if (ACPI_SUCCESS (Status))
|
|
{
|
|
/*
|
|
* Check if there is enough room in the
|
|
* caller's buffer
|
|
*/
|
|
|
|
if (UserBufferLength < BufferSpaceNeeded)
|
|
{
|
|
/*
|
|
* Caller's buffer is too small, can't
|
|
* give him partial results fail the call
|
|
* but return the buffer size needed
|
|
*/
|
|
|
|
DEBUG_PRINT (ACPI_INFO,
|
|
("AcpiEvaluateObject: Needed buffer size %X, received %X\n",
|
|
BufferSpaceNeeded, UserBufferLength));
|
|
|
|
ReturnBuffer->Length = BufferSpaceNeeded;
|
|
Status = AE_BUFFER_OVERFLOW;
|
|
}
|
|
|
|
else
|
|
{
|
|
/*
|
|
* We have enough space for the object, build it
|
|
*/
|
|
Status = AcpiCmCopyIobjectToEobject (ReturnObj,
|
|
ReturnBuffer);
|
|
ReturnBuffer->Length = BufferSpaceNeeded;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/* Delete the return and parameter objects */
|
|
|
|
if (ReturnObj)
|
|
{
|
|
/*
|
|
* Delete the internal return object. (Or at least
|
|
* decrement the reference count by one)
|
|
*/
|
|
AcpiCmRemoveReference (ReturnObj);
|
|
}
|
|
|
|
/*
|
|
* Free the input parameter list (if we created one),
|
|
*/
|
|
|
|
if (ParamPtr)
|
|
{
|
|
/* Free the allocated parameter block */
|
|
|
|
AcpiCmDeleteInternalObjectList (ParamPtr);
|
|
}
|
|
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiGetNextObject
|
|
*
|
|
* PARAMETERS: Type - Type of object to be searched for
|
|
* Parent - Parent object whose children we are getting
|
|
* LastChild - Previous child that was found.
|
|
* The NEXT child will be returned
|
|
* RetHandle - Where handle to the next object is placed
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Return the next peer object within the namespace. If Handle is
|
|
* valid, Scope is ignored. Otherwise, the first object within
|
|
* Scope is returned.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiGetNextObject (
|
|
ACPI_OBJECT_TYPE Type,
|
|
ACPI_HANDLE Parent,
|
|
ACPI_HANDLE Child,
|
|
ACPI_HANDLE *RetHandle)
|
|
{
|
|
ACPI_STATUS Status = AE_OK;
|
|
ACPI_NAMESPACE_NODE *Node;
|
|
ACPI_NAMESPACE_NODE *ParentNode = NULL;
|
|
ACPI_NAMESPACE_NODE *ChildNode = NULL;
|
|
|
|
|
|
/* Parameter validation */
|
|
|
|
if (Type > ACPI_TYPE_MAX)
|
|
{
|
|
return (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
AcpiCmAcquireMutex (ACPI_MTX_NAMESPACE);
|
|
|
|
/* If null handle, use the parent */
|
|
|
|
if (!Child)
|
|
{
|
|
/* Start search at the beginning of the specified scope */
|
|
|
|
ParentNode = AcpiNsConvertHandleToEntry (Parent);
|
|
if (!ParentNode)
|
|
{
|
|
Status = AE_BAD_PARAMETER;
|
|
goto UnlockAndExit;
|
|
}
|
|
}
|
|
|
|
/* Non-null handle, ignore the parent */
|
|
|
|
else
|
|
{
|
|
/* Convert and validate the handle */
|
|
|
|
ChildNode = AcpiNsConvertHandleToEntry (Child);
|
|
if (!ChildNode)
|
|
{
|
|
Status = AE_BAD_PARAMETER;
|
|
goto UnlockAndExit;
|
|
}
|
|
}
|
|
|
|
|
|
/* Internal function does the real work */
|
|
|
|
Node = AcpiNsGetNextObject ((OBJECT_TYPE_INTERNAL) Type,
|
|
ParentNode, ChildNode);
|
|
if (!Node)
|
|
{
|
|
Status = AE_NOT_FOUND;
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
if (RetHandle)
|
|
{
|
|
*RetHandle = AcpiNsConvertEntryToHandle (Node);
|
|
}
|
|
|
|
|
|
UnlockAndExit:
|
|
|
|
AcpiCmReleaseMutex (ACPI_MTX_NAMESPACE);
|
|
return (Status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiGetType
|
|
*
|
|
* PARAMETERS: Handle - Handle of object whose type is desired
|
|
* *RetType - Where the type will be placed
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: This routine returns the type associatd with a particular handle
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiGetType (
|
|
ACPI_HANDLE Handle,
|
|
ACPI_OBJECT_TYPE *RetType)
|
|
{
|
|
ACPI_NAMESPACE_NODE *Node;
|
|
|
|
|
|
/* Parameter Validation */
|
|
|
|
if (!RetType)
|
|
{
|
|
return (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/*
|
|
* Special case for the predefined Root Node
|
|
* (return type ANY)
|
|
*/
|
|
if (Handle == ACPI_ROOT_OBJECT)
|
|
{
|
|
*RetType = ACPI_TYPE_ANY;
|
|
return (AE_OK);
|
|
}
|
|
|
|
AcpiCmAcquireMutex (ACPI_MTX_NAMESPACE);
|
|
|
|
/* Convert and validate the handle */
|
|
|
|
Node = AcpiNsConvertHandleToEntry (Handle);
|
|
if (!Node)
|
|
{
|
|
AcpiCmReleaseMutex (ACPI_MTX_NAMESPACE);
|
|
return (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
*RetType = Node->Type;
|
|
|
|
|
|
AcpiCmReleaseMutex (ACPI_MTX_NAMESPACE);
|
|
return (AE_OK);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiGetParent
|
|
*
|
|
* PARAMETERS: Handle - Handle of object whose parent is desired
|
|
* RetHandle - Where the parent handle will be placed
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Returns a handle to the parent of the object represented by
|
|
* Handle.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiGetParent (
|
|
ACPI_HANDLE Handle,
|
|
ACPI_HANDLE *RetHandle)
|
|
{
|
|
ACPI_NAMESPACE_NODE *Node;
|
|
ACPI_STATUS Status = AE_OK;
|
|
|
|
|
|
/* No trace macro, too verbose */
|
|
|
|
|
|
if (!RetHandle)
|
|
{
|
|
return (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/* Special case for the predefined Root Node (no parent) */
|
|
|
|
if (Handle == ACPI_ROOT_OBJECT)
|
|
{
|
|
return (AE_NULL_ENTRY);
|
|
}
|
|
|
|
|
|
AcpiCmAcquireMutex (ACPI_MTX_NAMESPACE);
|
|
|
|
/* Convert and validate the handle */
|
|
|
|
Node = AcpiNsConvertHandleToEntry (Handle);
|
|
if (!Node)
|
|
{
|
|
Status = AE_BAD_PARAMETER;
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
|
|
/* Get the parent entry */
|
|
|
|
*RetHandle =
|
|
AcpiNsConvertEntryToHandle (AcpiNsGetParentObject (Node));
|
|
|
|
/* Return exeption if parent is null */
|
|
|
|
if (!AcpiNsGetParentObject (Node))
|
|
{
|
|
Status = AE_NULL_ENTRY;
|
|
}
|
|
|
|
|
|
UnlockAndExit:
|
|
|
|
AcpiCmReleaseMutex (ACPI_MTX_NAMESPACE);
|
|
return (Status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiWalkNamespace
|
|
*
|
|
* PARAMETERS: Type - ACPI_OBJECT_TYPE to search for
|
|
* StartObject - Handle in namespace where search begins
|
|
* MaxDepth - Depth to which search is to reach
|
|
* UserFunction - Called when an object of "Type" is found
|
|
* Context - Passed to user function
|
|
* ReturnValue - Location where return value of
|
|
* UserFunction is put if terminated early
|
|
*
|
|
* RETURNS Return value from the UserFunction if terminated early.
|
|
* Otherwise, returns NULL.
|
|
*
|
|
* DESCRIPTION: Performs a modified depth-first walk of the namespace tree,
|
|
* starting (and ending) at the object specified by StartHandle.
|
|
* The UserFunction is called whenever an object that matches
|
|
* the type parameter is found. If the user function returns
|
|
* a non-zero value, the search is terminated immediately and this
|
|
* value is returned to the caller.
|
|
*
|
|
* The point of this procedure is to provide a generic namespace
|
|
* walk routine that can be called from multiple places to
|
|
* provide multiple services; the User Function can be tailored
|
|
* to each task, whether it is a print function, a compare
|
|
* function, etc.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiWalkNamespace (
|
|
ACPI_OBJECT_TYPE Type,
|
|
ACPI_HANDLE StartObject,
|
|
UINT32 MaxDepth,
|
|
WALK_CALLBACK UserFunction,
|
|
void *Context,
|
|
void **ReturnValue)
|
|
{
|
|
ACPI_STATUS Status;
|
|
|
|
|
|
FUNCTION_TRACE ("AcpiWalkNamespace");
|
|
|
|
|
|
/* Parameter validation */
|
|
|
|
if ((Type > ACPI_TYPE_MAX) ||
|
|
(!MaxDepth) ||
|
|
(!UserFunction))
|
|
{
|
|
return_ACPI_STATUS (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/*
|
|
* Lock the namespace around the walk.
|
|
* The namespace will be unlocked/locked around each call
|
|
* to the user function - since this function
|
|
* must be allowed to make Acpi calls itself.
|
|
*/
|
|
|
|
AcpiCmAcquireMutex (ACPI_MTX_NAMESPACE);
|
|
Status = AcpiNsWalkNamespace ((OBJECT_TYPE_INTERNAL) Type,
|
|
StartObject, MaxDepth,
|
|
NS_WALK_UNLOCK,
|
|
UserFunction, Context,
|
|
ReturnValue);
|
|
|
|
AcpiCmReleaseMutex (ACPI_MTX_NAMESPACE);
|
|
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiNsGetDeviceCallback
|
|
*
|
|
* PARAMETERS: Callback from AcpiGetDevice
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Takes callbacks from WalkNamespace and filters out all non-
|
|
* present devices, or if they specified a HID, it filters based
|
|
* on that.
|
|
*
|
|
******************************************************************************/
|
|
|
|
static ACPI_STATUS
|
|
AcpiNsGetDeviceCallback (
|
|
ACPI_HANDLE ObjHandle,
|
|
UINT32 NestingLevel,
|
|
void *Context,
|
|
void **ReturnValue)
|
|
{
|
|
ACPI_STATUS Status;
|
|
ACPI_NAMESPACE_NODE *Node;
|
|
UINT32 Flags;
|
|
DEVICE_ID DeviceId;
|
|
ACPI_GET_DEVICES_INFO *Info;
|
|
|
|
|
|
Info = Context;
|
|
|
|
AcpiCmAcquireMutex (ACPI_MTX_NAMESPACE);
|
|
|
|
Node = AcpiNsConvertHandleToEntry (ObjHandle);
|
|
|
|
AcpiCmReleaseMutex (ACPI_MTX_NAMESPACE);
|
|
|
|
if (!Node)
|
|
{
|
|
return (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/*
|
|
* Run _STA to determine if device is present
|
|
*/
|
|
|
|
Status = AcpiCmExecute_STA (Node, &Flags);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return (Status);
|
|
}
|
|
|
|
if (!(Flags & 0x01))
|
|
{
|
|
/* don't return at the device or children of the device if not there */
|
|
|
|
return (AE_CTRL_DEPTH);
|
|
}
|
|
|
|
/*
|
|
* Filter based on device HID
|
|
*/
|
|
if (Info->Hid != NULL)
|
|
{
|
|
Status = AcpiCmExecute_HID (Node, &DeviceId);
|
|
|
|
if (Status == AE_NOT_FOUND)
|
|
{
|
|
return (AE_OK);
|
|
}
|
|
|
|
else if (ACPI_FAILURE (Status))
|
|
{
|
|
return (Status);
|
|
}
|
|
|
|
if (STRNCMP (DeviceId.Buffer, Info->Hid, sizeof (DeviceId.Buffer)) != 0)
|
|
{
|
|
return (AE_OK);
|
|
}
|
|
}
|
|
|
|
Info->UserFunction (ObjHandle, NestingLevel, Info->Context, ReturnValue);
|
|
|
|
return (AE_OK);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiGetDevices
|
|
*
|
|
* PARAMETERS: HID - HID to search for. Can be NULL.
|
|
* UserFunction - Called when a matching object is found
|
|
* Context - Passed to user function
|
|
* ReturnValue - Location where return value of
|
|
* UserFunction is put if terminated early
|
|
*
|
|
* RETURNS Return value from the UserFunction if terminated early.
|
|
* Otherwise, returns NULL.
|
|
*
|
|
* DESCRIPTION: Performs a modified depth-first walk of the namespace tree,
|
|
* starting (and ending) at the object specified by StartHandle.
|
|
* The UserFunction is called whenever an object that matches
|
|
* the type parameter is found. If the user function returns
|
|
* a non-zero value, the search is terminated immediately and this
|
|
* value is returned to the caller.
|
|
*
|
|
* This is a wrapper for WalkNamespace, but the callback performs
|
|
* additional filtering. Please see AcpiGetDeviceCallback.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiGetDevices (
|
|
NATIVE_CHAR *HID,
|
|
WALK_CALLBACK UserFunction,
|
|
void *Context,
|
|
void **ReturnValue)
|
|
{
|
|
ACPI_STATUS Status;
|
|
ACPI_GET_DEVICES_INFO Info;
|
|
|
|
|
|
FUNCTION_TRACE ("AcpiGetDevices");
|
|
|
|
|
|
/* Parameter validation */
|
|
|
|
if (!UserFunction)
|
|
{
|
|
return_ACPI_STATUS (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/*
|
|
* We're going to call their callback from OUR callback, so we need
|
|
* to know what it is, and their context parameter.
|
|
*/
|
|
Info.Context = Context;
|
|
Info.UserFunction = UserFunction;
|
|
Info.Hid = HID;
|
|
|
|
/*
|
|
* Lock the namespace around the walk.
|
|
* The namespace will be unlocked/locked around each call
|
|
* to the user function - since this function
|
|
* must be allowed to make Acpi calls itself.
|
|
*/
|
|
|
|
AcpiCmAcquireMutex (ACPI_MTX_NAMESPACE);
|
|
Status = AcpiNsWalkNamespace (ACPI_TYPE_DEVICE,
|
|
ACPI_ROOT_OBJECT, ACPI_UINT32_MAX,
|
|
NS_WALK_UNLOCK,
|
|
AcpiNsGetDeviceCallback, &Info,
|
|
ReturnValue);
|
|
|
|
AcpiCmReleaseMutex (ACPI_MTX_NAMESPACE);
|
|
|
|
return_ACPI_STATUS (Status);
|
|
}
|