854 lines
27 KiB
C
854 lines
27 KiB
C
/*******************************************************************************
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*
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* Module Name: nsxfobj - Public interfaces to the ACPI subsystem
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* ACPI Object oriented interfaces
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* $Revision: 76 $
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*
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******************************************************************************/
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/******************************************************************************
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*
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* 1. Copyright Notice
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*
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* Some or all of this work - Copyright (c) 1999, 2000, Intel Corp.
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* All rights reserved.
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*
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* 2. License
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*
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* 2.1. This is your license from Intel Corp. under its intellectual property
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* rights. You may have additional license terms from the party that provided
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* you this software, covering your right to use that party's intellectual
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* property rights.
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*
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* 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
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* copy of the source code appearing in this file ("Covered Code") an
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* irrevocable, perpetual, worldwide license under Intel's copyrights in the
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* base code distributed originally by Intel ("Original Intel Code") to copy,
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* make derivatives, distribute, use and display any portion of the Covered
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* Code in any form, with the right to sublicense such rights; and
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*
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* 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
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* license (with the right to sublicense), under only those claims of Intel
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* patents that are infringed by the Original Intel Code, to make, use, sell,
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* offer to sell, and import the Covered Code and derivative works thereof
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* solely to the minimum extent necessary to exercise the above copyright
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* license, and in no event shall the patent license extend to any additions
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* to or modifications of the Original Intel Code. No other license or right
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* is granted directly or by implication, estoppel or otherwise;
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*
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* The above copyright and patent license is granted only if the following
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* conditions are met:
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*
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* 3. Conditions
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*
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* 3.1. Redistribution of Source with Rights to Further Distribute Source.
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* Redistribution of source code of any substantial portion of the Covered
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* Code or modification with rights to further distribute source must include
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* the above Copyright Notice, the above License, this list of Conditions,
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* and the following Disclaimer and Export Compliance provision. In addition,
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* Licensee must cause all Covered Code to which Licensee contributes to
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* contain a file documenting the changes Licensee made to create that Covered
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* Code and the date of any change. Licensee must include in that file the
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* documentation of any changes made by any predecessor Licensee. Licensee
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* must include a prominent statement that the modification is derived,
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* directly or indirectly, from Original Intel Code.
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*
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* 3.2. Redistribution of Source with no Rights to Further Distribute Source.
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* Redistribution of source code of any substantial portion of the Covered
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* Code or modification without rights to further distribute source must
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* include the following Disclaimer and Export Compliance provision in the
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* documentation and/or other materials provided with distribution. In
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* addition, Licensee may not authorize further sublicense of source of any
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* portion of the Covered Code, and must include terms to the effect that the
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* license from Licensee to its licensee is limited to the intellectual
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* property embodied in the software Licensee provides to its licensee, and
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* not to intellectual property embodied in modifications its licensee may
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* make.
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*
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* 3.3. Redistribution of Executable. Redistribution in executable form of any
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* substantial portion of the Covered Code or modification must reproduce the
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* above Copyright Notice, and the following Disclaimer and Export Compliance
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* provision in the documentation and/or other materials provided with the
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* distribution.
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*
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* 3.4. Intel retains all right, title, and interest in and to the Original
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* Intel Code.
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*
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* 3.5. Neither the name Intel nor any other trademark owned or controlled by
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* Intel shall be used in advertising or otherwise to promote the sale, use or
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* other dealings in products derived from or relating to the Covered Code
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* without prior written authorization from Intel.
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*
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* 4. Disclaimer and Export Compliance
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*
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* 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
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* HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
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* IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
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* INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
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* UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
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* IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
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* PARTICULAR PURPOSE.
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*
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* 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
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* OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
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* COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
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* SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
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* CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
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* HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
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* SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
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* LIMITED REMEDY.
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*
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* 4.3. Licensee shall not export, either directly or indirectly, any of this
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* software or system incorporating such software without first obtaining any
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* required license or other approval from the U. S. Department of Commerce or
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* any other agency or department of the United States Government. In the
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* event Licensee exports any such software from the United States or
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* re-exports any such software from a foreign destination, Licensee shall
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* ensure that the distribution and export/re-export of the software is in
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* compliance with all laws, regulations, orders, or other restrictions of the
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* U.S. Export Administration Regulations. Licensee agrees that neither it nor
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* any of its subsidiaries will export/re-export any technical data, process,
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* software, or service, directly or indirectly, to any country for which the
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* United States government or any agency thereof requires an export license,
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* other governmental approval, or letter of assurance, without first obtaining
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* such license, approval or letter.
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*
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*****************************************************************************/
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#define __NSXFOBJ_C__
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#include "acpi.h"
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#include "acinterp.h"
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#include "acnamesp.h"
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#include "acdispat.h"
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#define _COMPONENT NAMESPACE
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MODULE_NAME ("nsxfobj")
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/*******************************************************************************
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*
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* FUNCTION: AcpiEvaluateObject
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*
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* PARAMETERS: Handle - Object handle (optional)
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* *Pathname - Object pathname (optional)
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* **Params - List of parameters to pass to
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* method, terminated by NULL.
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* Params itself may be NULL
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* if no parameters are being
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* passed.
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* *ReturnObject - Where to put method's return value (if
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* any). If NULL, no value is returned.
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*
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* RETURN: Status
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*
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* DESCRIPTION: Find and evaluate the given object, passing the given
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* parameters if necessary. One of "Handle" or "Pathname" must
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* be valid (non-null)
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiEvaluateObject (
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ACPI_HANDLE Handle,
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ACPI_STRING Pathname,
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ACPI_OBJECT_LIST *ParamObjects,
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ACPI_BUFFER *ReturnBuffer)
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{
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ACPI_STATUS Status;
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ACPI_OPERAND_OBJECT **ParamPtr = NULL;
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ACPI_OPERAND_OBJECT *ReturnObj = NULL;
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ACPI_OPERAND_OBJECT *ObjectPtr = NULL;
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UINT32 BufferSpaceNeeded;
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UINT32 UserBufferLength;
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UINT32 Count;
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UINT32 i;
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UINT32 ParamLength;
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UINT32 ObjectLength;
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FUNCTION_TRACE ("AcpiEvaluateObject");
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/*
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* If there are parameters to be passed to the object
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* (which must be a control method), the external objects
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* must be converted to internal objects
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*/
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if (ParamObjects && ParamObjects->Count)
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{
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/*
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* Allocate a new parameter block for the internal objects
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* Add 1 to count to allow for null terminated internal list
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*/
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Count = ParamObjects->Count;
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ParamLength = (Count + 1) * sizeof (void *);
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ObjectLength = Count * sizeof (ACPI_OPERAND_OBJECT);
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ParamPtr = AcpiCmCallocate (ParamLength + /* Parameter List part */
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ObjectLength); /* Actual objects */
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if (!ParamPtr)
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{
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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ObjectPtr = (ACPI_OPERAND_OBJECT *) ((UINT8 *) ParamPtr +
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ParamLength);
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/*
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* Init the param array of pointers and NULL terminate
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* the list
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*/
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for (i = 0; i < Count; i++)
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{
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ParamPtr[i] = &ObjectPtr[i];
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AcpiCmInitStaticObject (&ObjectPtr[i]);
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}
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ParamPtr[Count] = NULL;
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/*
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* Convert each external object in the list to an
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* internal object
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*/
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for (i = 0; i < Count; i++)
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{
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Status =
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AcpiCmBuildInternalObject (&ParamObjects->Pointer[i],
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ParamPtr[i]);
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if (ACPI_FAILURE (Status))
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{
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AcpiCmDeleteInternalObjectList (ParamPtr);
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return_ACPI_STATUS (Status);
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}
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}
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}
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/*
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* Three major cases:
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* 1) Fully qualified pathname
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* 2) No handle, not fully qualified pathname (error)
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* 3) Valid handle
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*/
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if ((Pathname) &&
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(AcpiNsValidRootPrefix (Pathname[0])))
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{
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/*
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* The path is fully qualified, just evaluate by name
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*/
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Status = AcpiNsEvaluateByName (Pathname, ParamPtr, &ReturnObj);
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}
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else if (!Handle)
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{
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/*
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* A handle is optional iff a fully qualified pathname
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* is specified. Since we've already handled fully
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* qualified names above, this is an error
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*/
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if (!Pathname)
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{
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DEBUG_PRINT (ACPI_ERROR,
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("AcpiEvaluateObject: Both Handle and Pathname are NULL\n"));
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}
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else
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{
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DEBUG_PRINT (ACPI_ERROR,
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("AcpiEvaluateObject: Handle is NULL and Pathname is relative\n"));
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}
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Status = AE_BAD_PARAMETER;
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}
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else
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{
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/*
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* We get here if we have a handle -- and if we have a
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* pathname it is relative. The handle will be validated
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* in the lower procedures
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*/
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if (!Pathname)
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{
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/*
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* The null pathname case means the handle is for
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* the actual object to be evaluated
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*/
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Status = AcpiNsEvaluateByHandle (Handle, ParamPtr, &ReturnObj);
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}
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else
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{
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/*
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* Both a Handle and a relative Pathname
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*/
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Status = AcpiNsEvaluateRelative (Handle, Pathname, ParamPtr,
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&ReturnObj);
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}
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}
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/*
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* If we are expecting a return value, and all went well above,
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* copy the return value to an external object.
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*/
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if (ReturnBuffer)
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{
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UserBufferLength = ReturnBuffer->Length;
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ReturnBuffer->Length = 0;
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if (ReturnObj)
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{
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if (VALID_DESCRIPTOR_TYPE (ReturnObj, ACPI_DESC_TYPE_NAMED))
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{
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/*
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* If we got an Node as a return object,
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* this means the object we are evaluating
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* has nothing interesting to return (such
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* as a mutex, etc.) We return an error
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* because these types are essentially
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* unsupported by this interface. We
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* don't check up front because this makes
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* it easier to add support for various
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* types at a later date if necessary.
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*/
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Status = AE_TYPE;
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ReturnObj = NULL; /* No need to delete an Node */
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}
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if (ACPI_SUCCESS (Status))
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{
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/*
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* Find out how large a buffer is needed
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* to contain the returned object
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*/
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Status = AcpiCmGetObjectSize (ReturnObj,
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&BufferSpaceNeeded);
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if (ACPI_SUCCESS (Status))
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{
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/*
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* Check if there is enough room in the
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* caller's buffer
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*/
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if (UserBufferLength < BufferSpaceNeeded)
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{
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/*
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* Caller's buffer is too small, can't
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* give him partial results fail the call
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* but return the buffer size needed
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*/
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DEBUG_PRINT (ACPI_INFO,
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("AcpiEvaluateObject: Needed buffer size %X, received %X\n",
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BufferSpaceNeeded, UserBufferLength));
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ReturnBuffer->Length = BufferSpaceNeeded;
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Status = AE_BUFFER_OVERFLOW;
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}
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else
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{
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/*
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* We have enough space for the object, build it
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*/
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Status = AcpiCmBuildExternalObject (ReturnObj,
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ReturnBuffer);
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ReturnBuffer->Length = BufferSpaceNeeded;
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}
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}
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}
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}
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}
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/* Delete the return and parameter objects */
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if (ReturnObj)
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{
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/*
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* Delete the internal return object. (Or at least
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* decrement the reference count by one)
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*/
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AcpiCmRemoveReference (ReturnObj);
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}
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/*
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* Free the input parameter list (if we created one),
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*/
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if (ParamPtr)
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{
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/* Free the allocated parameter block */
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AcpiCmDeleteInternalObjectList (ParamPtr);
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}
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return_ACPI_STATUS (Status);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiGetNextObject
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*
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* PARAMETERS: Type - Type of object to be searched for
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* Parent - Parent object whose children we are getting
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* LastChild - Previous child that was found.
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* The NEXT child will be returned
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* RetHandle - Where handle to the next object is placed
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*
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* RETURN: Status
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*
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* DESCRIPTION: Return the next peer object within the namespace. If Handle is
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* valid, Scope is ignored. Otherwise, the first object within
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* Scope is returned.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiGetNextObject (
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ACPI_OBJECT_TYPE Type,
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ACPI_HANDLE Parent,
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ACPI_HANDLE Child,
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ACPI_HANDLE *RetHandle)
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{
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ACPI_STATUS Status = AE_OK;
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ACPI_NAMESPACE_NODE *Node;
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ACPI_NAMESPACE_NODE *ParentNode = NULL;
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ACPI_NAMESPACE_NODE *ChildNode = NULL;
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/* Parameter validation */
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if (Type > ACPI_TYPE_MAX)
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{
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return (AE_BAD_PARAMETER);
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}
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AcpiCmAcquireMutex (ACPI_MTX_NAMESPACE);
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/* If null handle, use the parent */
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if (!Child)
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{
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/* Start search at the beginning of the specified scope */
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ParentNode = AcpiNsConvertHandleToEntry (Parent);
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if (!ParentNode)
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{
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Status = AE_BAD_PARAMETER;
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goto UnlockAndExit;
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}
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}
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/* Non-null handle, ignore the parent */
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else
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{
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/* Convert and validate the handle */
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ChildNode = AcpiNsConvertHandleToEntry (Child);
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if (!ChildNode)
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{
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Status = AE_BAD_PARAMETER;
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goto UnlockAndExit;
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}
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}
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/* Internal function does the real work */
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Node = AcpiNsGetNextObject ((OBJECT_TYPE_INTERNAL) Type,
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ParentNode, ChildNode);
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if (!Node)
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{
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Status = AE_NOT_FOUND;
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goto UnlockAndExit;
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}
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if (RetHandle)
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{
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*RetHandle = AcpiNsConvertEntryToHandle (Node);
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}
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UnlockAndExit:
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AcpiCmReleaseMutex (ACPI_MTX_NAMESPACE);
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return (Status);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiGetType
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*
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* PARAMETERS: Handle - Handle of object whose type is desired
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* *RetType - Where the type will be placed
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*
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* RETURN: Status
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*
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* DESCRIPTION: This routine returns the type associatd with a particular handle
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiGetType (
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ACPI_HANDLE Handle,
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ACPI_OBJECT_TYPE *RetType)
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{
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ACPI_NAMESPACE_NODE *Node;
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|
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/* Parameter Validation */
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if (!RetType)
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{
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return (AE_BAD_PARAMETER);
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}
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/*
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* Special case for the predefined Root Node
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* (return type ANY)
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*/
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if (Handle == ACPI_ROOT_OBJECT)
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{
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*RetType = ACPI_TYPE_ANY;
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return (AE_OK);
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}
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AcpiCmAcquireMutex (ACPI_MTX_NAMESPACE);
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/* Convert and validate the handle */
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Node = AcpiNsConvertHandleToEntry (Handle);
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if (!Node)
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{
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AcpiCmReleaseMutex (ACPI_MTX_NAMESPACE);
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return (AE_BAD_PARAMETER);
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}
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*RetType = Node->Type;
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AcpiCmReleaseMutex (ACPI_MTX_NAMESPACE);
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiGetParent
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*
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* PARAMETERS: Handle - Handle of object whose parent is desired
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* RetHandle - Where the parent handle will be placed
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*
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* RETURN: Status
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*
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* DESCRIPTION: Returns a handle to the parent of the object represented by
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* Handle.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiGetParent (
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ACPI_HANDLE Handle,
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ACPI_HANDLE *RetHandle)
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{
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ACPI_NAMESPACE_NODE *Node;
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ACPI_STATUS Status = AE_OK;
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|
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/* No trace macro, too verbose */
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|
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if (!RetHandle)
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{
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return (AE_BAD_PARAMETER);
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}
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/* Special case for the predefined Root Node (no parent) */
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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);
|
|
if (!Node)
|
|
{
|
|
AcpiCmReleaseMutex (ACPI_MTX_NAMESPACE);
|
|
return (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
AcpiCmReleaseMutex (ACPI_MTX_NAMESPACE);
|
|
|
|
/*
|
|
* 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);
|
|
}
|