1033 lines
32 KiB
C
1033 lines
32 KiB
C
/*******************************************************************************
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*
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* Module Name: nsxfeval - Public interfaces to the ACPI subsystem
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* ACPI Object evaluation interfaces
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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 - 2011, 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 __NSXFEVAL_C__
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#include "acpi.h"
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#include "accommon.h"
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#include "acnamesp.h"
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#include "acinterp.h"
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#define _COMPONENT ACPI_NAMESPACE
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ACPI_MODULE_NAME ("nsxfeval")
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/* Local prototypes */
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static void
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AcpiNsResolveReferences (
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ACPI_EVALUATE_INFO *Info);
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/*******************************************************************************
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*
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* FUNCTION: AcpiEvaluateObjectTyped
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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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* ExternalParams - List of parameters to pass to method,
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* terminated by NULL. May be NULL
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* if no parameters are being passed.
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* ReturnBuffer - Where to put method's return value (if
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* any). If NULL, no value is returned.
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* ReturnType - Expected type of return object
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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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AcpiEvaluateObjectTyped (
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ACPI_HANDLE Handle,
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ACPI_STRING Pathname,
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ACPI_OBJECT_LIST *ExternalParams,
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ACPI_BUFFER *ReturnBuffer,
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ACPI_OBJECT_TYPE ReturnType)
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{
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ACPI_STATUS Status;
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BOOLEAN MustFree = FALSE;
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ACPI_FUNCTION_TRACE (AcpiEvaluateObjectTyped);
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/* Return buffer must be valid */
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if (!ReturnBuffer)
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{
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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if (ReturnBuffer->Length == ACPI_ALLOCATE_BUFFER)
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{
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MustFree = TRUE;
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}
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/* Evaluate the object */
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Status = AcpiEvaluateObject (Handle, Pathname, ExternalParams, ReturnBuffer);
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if (ACPI_FAILURE (Status))
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{
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return_ACPI_STATUS (Status);
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}
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/* Type ANY means "don't care" */
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if (ReturnType == ACPI_TYPE_ANY)
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{
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return_ACPI_STATUS (AE_OK);
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}
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if (ReturnBuffer->Length == 0)
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{
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/* Error because caller specifically asked for a return value */
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ACPI_ERROR ((AE_INFO, "No return value"));
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return_ACPI_STATUS (AE_NULL_OBJECT);
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}
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/* Examine the object type returned from EvaluateObject */
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if (((ACPI_OBJECT *) ReturnBuffer->Pointer)->Type == ReturnType)
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{
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return_ACPI_STATUS (AE_OK);
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}
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/* Return object type does not match requested type */
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ACPI_ERROR ((AE_INFO,
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"Incorrect return type [%s] requested [%s]",
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AcpiUtGetTypeName (((ACPI_OBJECT *) ReturnBuffer->Pointer)->Type),
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AcpiUtGetTypeName (ReturnType)));
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if (MustFree)
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{
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/* Caller used ACPI_ALLOCATE_BUFFER, free the return buffer */
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AcpiOsFree (ReturnBuffer->Pointer);
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ReturnBuffer->Pointer = NULL;
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}
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ReturnBuffer->Length = 0;
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return_ACPI_STATUS (AE_TYPE);
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}
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ACPI_EXPORT_SYMBOL (AcpiEvaluateObjectTyped)
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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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* ExternalParams - List of parameters to pass to method,
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* terminated by NULL. May be NULL
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* if no parameters are being passed.
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* ReturnBuffer - 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 *ExternalParams,
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ACPI_BUFFER *ReturnBuffer)
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{
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ACPI_STATUS Status;
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ACPI_EVALUATE_INFO *Info;
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ACPI_SIZE BufferSpaceNeeded;
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UINT32 i;
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ACPI_FUNCTION_TRACE (AcpiEvaluateObject);
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/* Allocate and initialize the evaluation information block */
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Info = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO));
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if (!Info)
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{
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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Info->Pathname = Pathname;
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/* Convert and validate the device handle */
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Info->PrefixNode = AcpiNsValidateHandle (Handle);
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if (!Info->PrefixNode)
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{
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Status = AE_BAD_PARAMETER;
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goto Cleanup;
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}
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/*
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* If there are parameters to be passed to a control method, the external
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* objects must all be converted to internal objects
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*/
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if (ExternalParams && ExternalParams->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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Info->Parameters = ACPI_ALLOCATE_ZEROED (
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((ACPI_SIZE) ExternalParams->Count + 1) * sizeof (void *));
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if (!Info->Parameters)
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{
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Status = AE_NO_MEMORY;
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goto Cleanup;
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}
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/* Convert each external object in the list to an internal object */
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for (i = 0; i < ExternalParams->Count; i++)
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{
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Status = AcpiUtCopyEobjectToIobject (
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&ExternalParams->Pointer[i], &Info->Parameters[i]);
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if (ACPI_FAILURE (Status))
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{
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goto Cleanup;
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}
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}
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Info->Parameters[ExternalParams->Count] = NULL;
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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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/* The path is fully qualified, just evaluate by name */
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Info->PrefixNode = NULL;
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Status = AcpiNsEvaluate (Info);
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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 is specified.
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* Since we've already handled fully qualified names above, this is
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* an error
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*/
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if (!Pathname)
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
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"Both Handle and Pathname are NULL"));
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}
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else
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
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"Null Handle with relative pathname [%s]", Pathname));
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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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/* We have a namespace a node and a possible relative path */
|
|
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Status = AcpiNsEvaluate (Info);
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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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if (ReturnBuffer)
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{
|
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if (!Info->ReturnObject)
|
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{
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ReturnBuffer->Length = 0;
|
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}
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else
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{
|
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if (ACPI_GET_DESCRIPTOR_TYPE (Info->ReturnObject) ==
|
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ACPI_DESC_TYPE_NAMED)
|
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{
|
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/*
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* If we received a NS Node as a return object, this means that
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* the object we are evaluating has nothing interesting to
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* return (such as a mutex, etc.) We return an error because
|
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* these types are essentially unsupported by this interface.
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* We don't check up front because this makes it easier to add
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* support for various types at a later date if necessary.
|
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*/
|
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Status = AE_TYPE;
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Info->ReturnObject = NULL; /* No need to delete a NS Node */
|
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ReturnBuffer->Length = 0;
|
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}
|
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|
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if (ACPI_SUCCESS (Status))
|
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{
|
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/* Dereference Index and RefOf references */
|
|
|
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AcpiNsResolveReferences (Info);
|
|
|
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/* Get the size of the returned object */
|
|
|
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Status = AcpiUtGetObjectSize (Info->ReturnObject,
|
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&BufferSpaceNeeded);
|
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if (ACPI_SUCCESS (Status))
|
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{
|
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/* Validate/Allocate/Clear caller buffer */
|
|
|
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Status = AcpiUtInitializeBuffer (ReturnBuffer,
|
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BufferSpaceNeeded);
|
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if (ACPI_FAILURE (Status))
|
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{
|
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/*
|
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* Caller's buffer is too small or a new one can't
|
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* be allocated
|
|
*/
|
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ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
|
|
"Needed buffer size %X, %s\n",
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(UINT32) BufferSpaceNeeded,
|
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AcpiFormatException (Status)));
|
|
}
|
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else
|
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{
|
|
/* We have enough space for the object, build it */
|
|
|
|
Status = AcpiUtCopyIobjectToEobject (Info->ReturnObject,
|
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ReturnBuffer);
|
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}
|
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}
|
|
}
|
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}
|
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}
|
|
|
|
if (Info->ReturnObject)
|
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{
|
|
/*
|
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* Delete the internal return object. NOTE: Interpreter must be
|
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* locked to avoid race condition.
|
|
*/
|
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AcpiExEnterInterpreter ();
|
|
|
|
/* Remove one reference on the return object (should delete it) */
|
|
|
|
AcpiUtRemoveReference (Info->ReturnObject);
|
|
AcpiExExitInterpreter ();
|
|
}
|
|
|
|
|
|
Cleanup:
|
|
|
|
/* Free the input parameter list (if we created one) */
|
|
|
|
if (Info->Parameters)
|
|
{
|
|
/* Free the allocated parameter block */
|
|
|
|
AcpiUtDeleteInternalObjectList (Info->Parameters);
|
|
}
|
|
|
|
ACPI_FREE (Info);
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL (AcpiEvaluateObject)
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiNsResolveReferences
|
|
*
|
|
* PARAMETERS: Info - Evaluation info block
|
|
*
|
|
* RETURN: Info->ReturnObject is replaced with the dereferenced object
|
|
*
|
|
* DESCRIPTION: Dereference certain reference objects. Called before an
|
|
* internal return object is converted to an external ACPI_OBJECT.
|
|
*
|
|
* Performs an automatic dereference of Index and RefOf reference objects.
|
|
* These reference objects are not supported by the ACPI_OBJECT, so this is a
|
|
* last resort effort to return something useful. Also, provides compatibility
|
|
* with other ACPI implementations.
|
|
*
|
|
* NOTE: does not handle references within returned package objects or nested
|
|
* references, but this support could be added later if found to be necessary.
|
|
*
|
|
******************************************************************************/
|
|
|
|
static void
|
|
AcpiNsResolveReferences (
|
|
ACPI_EVALUATE_INFO *Info)
|
|
{
|
|
ACPI_OPERAND_OBJECT *ObjDesc = NULL;
|
|
ACPI_NAMESPACE_NODE *Node;
|
|
|
|
|
|
/* We are interested in reference objects only */
|
|
|
|
if ((Info->ReturnObject)->Common.Type != ACPI_TYPE_LOCAL_REFERENCE)
|
|
{
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Two types of references are supported - those created by Index and
|
|
* RefOf operators. A name reference (AML_NAMEPATH_OP) can be converted
|
|
* to an ACPI_OBJECT, so it is not dereferenced here. A DdbHandle
|
|
* (AML_LOAD_OP) cannot be dereferenced, nor can it be converted to
|
|
* an ACPI_OBJECT.
|
|
*/
|
|
switch (Info->ReturnObject->Reference.Class)
|
|
{
|
|
case ACPI_REFCLASS_INDEX:
|
|
|
|
ObjDesc = *(Info->ReturnObject->Reference.Where);
|
|
break;
|
|
|
|
case ACPI_REFCLASS_REFOF:
|
|
|
|
Node = Info->ReturnObject->Reference.Object;
|
|
if (Node)
|
|
{
|
|
ObjDesc = Node->Object;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
return;
|
|
}
|
|
|
|
/* Replace the existing reference object */
|
|
|
|
if (ObjDesc)
|
|
{
|
|
AcpiUtAddReference (ObjDesc);
|
|
AcpiUtRemoveReference (Info->ReturnObject);
|
|
Info->ReturnObject = ObjDesc;
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* 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
|
|
* PreOrderVisit - Called during tree pre-order visit
|
|
* when an object of "Type" is found
|
|
* PostOrderVisit - Called during tree post-order visit
|
|
* when an object of "Type" is found
|
|
* Context - Passed to user function(s) above
|
|
* 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 callback function is called whenever an object that matches
|
|
* the type parameter is found. If the callback 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 callback function(s) 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,
|
|
ACPI_WALK_CALLBACK PreOrderVisit,
|
|
ACPI_WALK_CALLBACK PostOrderVisit,
|
|
void *Context,
|
|
void **ReturnValue)
|
|
{
|
|
ACPI_STATUS Status;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (AcpiWalkNamespace);
|
|
|
|
|
|
/* Parameter validation */
|
|
|
|
if ((Type > ACPI_TYPE_LOCAL_MAX) ||
|
|
(!MaxDepth) ||
|
|
(!PreOrderVisit && !PostOrderVisit))
|
|
{
|
|
return_ACPI_STATUS (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/*
|
|
* Need to acquire the namespace reader lock to prevent interference
|
|
* with any concurrent table unloads (which causes the deletion of
|
|
* namespace objects). We cannot allow the deletion of a namespace node
|
|
* while the user function is using it. The exception to this are the
|
|
* nodes created and deleted during control method execution -- these
|
|
* nodes are marked as temporary nodes and are ignored by the namespace
|
|
* walk. Thus, control methods can be executed while holding the
|
|
* namespace deletion lock (and the user function can execute control
|
|
* methods.)
|
|
*/
|
|
Status = AcpiUtAcquireReadLock (&AcpiGbl_NamespaceRwLock);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return (Status);
|
|
}
|
|
|
|
/*
|
|
* Lock the namespace around the walk. The namespace will be
|
|
* unlocked/locked around each call to the user function - since the user
|
|
* function must be allowed to make ACPICA calls itself (for example, it
|
|
* will typically execute control methods during device enumeration.)
|
|
*/
|
|
Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
Status = AcpiNsWalkNamespace (Type, StartObject, MaxDepth,
|
|
ACPI_NS_WALK_UNLOCK, PreOrderVisit,
|
|
PostOrderVisit, Context, ReturnValue);
|
|
|
|
(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
|
|
|
|
UnlockAndExit:
|
|
(void) AcpiUtReleaseReadLock (&AcpiGbl_NamespaceRwLock);
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL (AcpiWalkNamespace)
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* 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_GET_DEVICES_INFO *Info = Context;
|
|
ACPI_STATUS Status;
|
|
ACPI_NAMESPACE_NODE *Node;
|
|
UINT32 Flags;
|
|
ACPI_DEVICE_ID *Hid;
|
|
ACPI_DEVICE_ID_LIST *Cid;
|
|
UINT32 i;
|
|
BOOLEAN Found;
|
|
int NoMatch;
|
|
|
|
|
|
Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return (Status);
|
|
}
|
|
|
|
Node = AcpiNsValidateHandle (ObjHandle);
|
|
Status = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return (Status);
|
|
}
|
|
|
|
if (!Node)
|
|
{
|
|
return (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/*
|
|
* First, filter based on the device HID and CID.
|
|
*
|
|
* 01/2010: For this case where a specific HID is requested, we don't
|
|
* want to run _STA until we have an actual HID match. Thus, we will
|
|
* not unnecessarily execute _STA on devices for which the caller
|
|
* doesn't care about. Previously, _STA was executed unconditionally
|
|
* on all devices found here.
|
|
*
|
|
* A side-effect of this change is that now we will continue to search
|
|
* for a matching HID even under device trees where the parent device
|
|
* would have returned a _STA that indicates it is not present or
|
|
* not functioning (thus aborting the search on that branch).
|
|
*/
|
|
if (Info->Hid != NULL)
|
|
{
|
|
Status = AcpiUtExecute_HID (Node, &Hid);
|
|
if (Status == AE_NOT_FOUND)
|
|
{
|
|
return (AE_OK);
|
|
}
|
|
else if (ACPI_FAILURE (Status))
|
|
{
|
|
return (AE_CTRL_DEPTH);
|
|
}
|
|
|
|
NoMatch = ACPI_STRCMP (Hid->String, Info->Hid);
|
|
ACPI_FREE (Hid);
|
|
|
|
if (NoMatch)
|
|
{
|
|
/*
|
|
* HID does not match, attempt match within the
|
|
* list of Compatible IDs (CIDs)
|
|
*/
|
|
Status = AcpiUtExecute_CID (Node, &Cid);
|
|
if (Status == AE_NOT_FOUND)
|
|
{
|
|
return (AE_OK);
|
|
}
|
|
else if (ACPI_FAILURE (Status))
|
|
{
|
|
return (AE_CTRL_DEPTH);
|
|
}
|
|
|
|
/* Walk the CID list */
|
|
|
|
Found = FALSE;
|
|
for (i = 0; i < Cid->Count; i++)
|
|
{
|
|
if (ACPI_STRCMP (Cid->Ids[i].String, Info->Hid) == 0)
|
|
{
|
|
/* Found a matching CID */
|
|
|
|
Found = TRUE;
|
|
break;
|
|
}
|
|
}
|
|
|
|
ACPI_FREE (Cid);
|
|
if (!Found)
|
|
{
|
|
return (AE_OK);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Run _STA to determine if device is present */
|
|
|
|
Status = AcpiUtExecute_STA (Node, &Flags);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return (AE_CTRL_DEPTH);
|
|
}
|
|
|
|
if (!(Flags & ACPI_STA_DEVICE_PRESENT) &&
|
|
!(Flags & ACPI_STA_DEVICE_FUNCTIONING))
|
|
{
|
|
/*
|
|
* Don't examine the children of the device only when the
|
|
* device is neither present nor functional. See ACPI spec,
|
|
* description of _STA for more information.
|
|
*/
|
|
return (AE_CTRL_DEPTH);
|
|
}
|
|
|
|
/* We have a valid device, invoke the user function */
|
|
|
|
Status = Info->UserFunction (ObjHandle, NestingLevel, Info->Context,
|
|
ReturnValue);
|
|
return (Status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* 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 of type
|
|
* Device 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 AcpiNsGetDeviceCallback.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiGetDevices (
|
|
char *HID,
|
|
ACPI_WALK_CALLBACK UserFunction,
|
|
void *Context,
|
|
void **ReturnValue)
|
|
{
|
|
ACPI_STATUS Status;
|
|
ACPI_GET_DEVICES_INFO Info;
|
|
|
|
|
|
ACPI_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.Hid = HID;
|
|
Info.Context = Context;
|
|
Info.UserFunction = UserFunction;
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
Status = AcpiNsWalkNamespace (ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
|
|
ACPI_UINT32_MAX, ACPI_NS_WALK_UNLOCK,
|
|
AcpiNsGetDeviceCallback, NULL, &Info, ReturnValue);
|
|
|
|
(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL (AcpiGetDevices)
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiAttachData
|
|
*
|
|
* PARAMETERS: ObjHandle - Namespace node
|
|
* Handler - Handler for this attachment
|
|
* Data - Pointer to data to be attached
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Attach arbitrary data and handler to a namespace node.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiAttachData (
|
|
ACPI_HANDLE ObjHandle,
|
|
ACPI_OBJECT_HANDLER Handler,
|
|
void *Data)
|
|
{
|
|
ACPI_NAMESPACE_NODE *Node;
|
|
ACPI_STATUS Status;
|
|
|
|
|
|
/* Parameter validation */
|
|
|
|
if (!ObjHandle ||
|
|
!Handler ||
|
|
!Data)
|
|
{
|
|
return (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return (Status);
|
|
}
|
|
|
|
/* Convert and validate the handle */
|
|
|
|
Node = AcpiNsValidateHandle (ObjHandle);
|
|
if (!Node)
|
|
{
|
|
Status = AE_BAD_PARAMETER;
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
Status = AcpiNsAttachData (Node, Handler, Data);
|
|
|
|
UnlockAndExit:
|
|
(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
|
|
return (Status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL (AcpiAttachData)
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiDetachData
|
|
*
|
|
* PARAMETERS: ObjHandle - Namespace node handle
|
|
* Handler - Handler used in call to AcpiAttachData
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Remove data that was previously attached to a node.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiDetachData (
|
|
ACPI_HANDLE ObjHandle,
|
|
ACPI_OBJECT_HANDLER Handler)
|
|
{
|
|
ACPI_NAMESPACE_NODE *Node;
|
|
ACPI_STATUS Status;
|
|
|
|
|
|
/* Parameter validation */
|
|
|
|
if (!ObjHandle ||
|
|
!Handler)
|
|
{
|
|
return (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return (Status);
|
|
}
|
|
|
|
/* Convert and validate the handle */
|
|
|
|
Node = AcpiNsValidateHandle (ObjHandle);
|
|
if (!Node)
|
|
{
|
|
Status = AE_BAD_PARAMETER;
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
Status = AcpiNsDetachData (Node, Handler);
|
|
|
|
UnlockAndExit:
|
|
(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
|
|
return (Status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL (AcpiDetachData)
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiGetData
|
|
*
|
|
* PARAMETERS: ObjHandle - Namespace node
|
|
* Handler - Handler used in call to AttachData
|
|
* Data - Where the data is returned
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Retrieve data that was previously attached to a namespace node.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiGetData (
|
|
ACPI_HANDLE ObjHandle,
|
|
ACPI_OBJECT_HANDLER Handler,
|
|
void **Data)
|
|
{
|
|
ACPI_NAMESPACE_NODE *Node;
|
|
ACPI_STATUS Status;
|
|
|
|
|
|
/* Parameter validation */
|
|
|
|
if (!ObjHandle ||
|
|
!Handler ||
|
|
!Data)
|
|
{
|
|
return (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return (Status);
|
|
}
|
|
|
|
/* Convert and validate the handle */
|
|
|
|
Node = AcpiNsValidateHandle (ObjHandle);
|
|
if (!Node)
|
|
{
|
|
Status = AE_BAD_PARAMETER;
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
Status = AcpiNsGetAttachedData (Node, Handler, Data);
|
|
|
|
UnlockAndExit:
|
|
(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
|
|
return (Status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL (AcpiGetData)
|
|
|
|
|