410 lines
14 KiB
C
410 lines
14 KiB
C
/******************************************************************************
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*
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* Module Name: nsxfname - Public interfaces to the ACPI subsystem
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* ACPI Namespace oriented interfaces
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* $Revision: 75 $
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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, 2001, 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 __NSXFNAME_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 "amlcode.h"
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#include "acparser.h"
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#include "acdispat.h"
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#include "acevents.h"
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#define _COMPONENT NAMESPACE
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MODULE_NAME ("nsxfname")
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/****************************************************************************
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*
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* FUNCTION: AcpiGetHandle
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*
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* PARAMETERS: Parent - Object to search under (search scope).
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* PathName - Pointer to an asciiz string containing the
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* name
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* RetHandle - Where the return handle is placed
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*
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* RETURN: Status
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*
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* DESCRIPTION: This routine will search for a caller specified name in the
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* name space. The caller can restrict the search region by
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* specifying a non NULL parent. The parent value is itself a
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* namespace handle.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiGetHandle (
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ACPI_HANDLE Parent,
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ACPI_STRING Pathname,
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ACPI_HANDLE *RetHandle)
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{
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ACPI_STATUS Status;
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ACPI_NAMESPACE_NODE *Node = NULL;
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ACPI_NAMESPACE_NODE *PrefixNode = NULL;
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if (!RetHandle || !Pathname)
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{
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return (AE_BAD_PARAMETER);
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}
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/* Convert a parent handle to a prefix node */
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if (Parent)
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{
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AcpiCmAcquireMutex (ACPI_MTX_NAMESPACE);
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PrefixNode = AcpiNsConvertHandleToEntry (Parent);
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if (!PrefixNode)
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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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AcpiCmReleaseMutex (ACPI_MTX_NAMESPACE);
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}
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/* Special case for root, since we can't search for it */
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if (STRCMP (Pathname, NS_ROOT_PATH) == 0)
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{
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*RetHandle = AcpiNsConvertEntryToHandle (AcpiGbl_RootNode);
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return (AE_OK);
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}
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/*
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* Find the Node and convert to a handle
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*/
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Status = AcpiNsGetNode (Pathname, PrefixNode, &Node);
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*RetHandle = NULL;
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if (ACPI_SUCCESS (Status))
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{
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*RetHandle = AcpiNsConvertEntryToHandle (Node);
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}
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return (Status);
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}
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/****************************************************************************
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*
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* FUNCTION: AcpiGetPathname
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*
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* PARAMETERS: Handle - Handle to be converted to a pathname
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* NameType - Full pathname or single segment
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* RetPathPtr - Buffer for returned path
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*
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* RETURN: Pointer to a string containing the fully qualified Name.
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*
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* DESCRIPTION: This routine returns the fully qualified name associated with
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* the Handle parameter. This and the AcpiPathnameToHandle are
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* complementary functions.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiGetName (
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ACPI_HANDLE Handle,
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UINT32 NameType,
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ACPI_BUFFER *RetPathPtr)
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{
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ACPI_STATUS Status;
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ACPI_NAMESPACE_NODE *Node;
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/* Buffer pointer must be valid always */
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if (!RetPathPtr || (NameType > ACPI_NAME_TYPE_MAX))
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{
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return (AE_BAD_PARAMETER);
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}
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/* Allow length to be zero and ignore the pointer */
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if ((RetPathPtr->Length) &&
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(!RetPathPtr->Pointer))
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{
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return (AE_BAD_PARAMETER);
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}
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if (NameType == ACPI_FULL_PATHNAME)
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{
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/* Get the full pathname (From the namespace root) */
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Status = AcpiNsHandleToPathname (Handle, &RetPathPtr->Length,
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RetPathPtr->Pointer);
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return (Status);
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}
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/*
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* Wants the single segment ACPI name.
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* Validate handle and convert to an Node
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*/
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AcpiCmAcquireMutex (ACPI_MTX_NAMESPACE);
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Node = AcpiNsConvertHandleToEntry (Handle);
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if (!Node)
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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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/* Check if name will fit in buffer */
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if (RetPathPtr->Length < PATH_SEGMENT_LENGTH)
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{
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RetPathPtr->Length = PATH_SEGMENT_LENGTH;
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Status = AE_BUFFER_OVERFLOW;
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goto UnlockAndExit;
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}
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/* Just copy the ACPI name from the Node and zero terminate it */
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STRNCPY (RetPathPtr->Pointer, (NATIVE_CHAR *) &Node->Name,
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ACPI_NAME_SIZE);
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((NATIVE_CHAR *) RetPathPtr->Pointer) [ACPI_NAME_SIZE] = 0;
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Status = AE_OK;
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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: AcpiGetObjectInfo
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*
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* PARAMETERS: Handle - Object Handle
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* Info - Where the info is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Returns information about an object as gleaned from the
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* namespace node and possibly by running several standard
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* control methods (Such as in the case of a device.)
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiGetObjectInfo (
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ACPI_HANDLE Handle,
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ACPI_DEVICE_INFO *Info)
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{
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DEVICE_ID Hid;
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DEVICE_ID Uid;
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ACPI_STATUS Status;
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UINT32 DeviceStatus = 0;
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ACPI_INTEGER Address = 0;
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ACPI_NAMESPACE_NODE *Node;
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/* Parameter validation */
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if (!Handle || !Info)
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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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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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Info->Type = Node->Type;
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Info->Name = Node->Name;
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AcpiCmReleaseMutex (ACPI_MTX_NAMESPACE);
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/*
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* If not a device, we are all done.
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*/
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if (Info->Type != ACPI_TYPE_DEVICE)
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{
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return (AE_OK);
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}
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/*
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* Get extra info for ACPI devices only. Run the
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* _HID, _UID, _STA, and _ADR methods. Note: none
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* of these methods are required, so they may or may
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* not be present. The Info->Valid bits are used
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* to indicate which methods ran successfully.
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*/
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Info->Valid = 0;
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/* Execute the _HID method and save the result */
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Status = AcpiCmExecute_HID (Node, &Hid);
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if (ACPI_SUCCESS (Status))
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{
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STRNCPY (Info->HardwareId, Hid.Buffer, sizeof(Info->HardwareId));
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Info->Valid |= ACPI_VALID_HID;
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}
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/* Execute the _UID method and save the result */
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Status = AcpiCmExecute_UID (Node, &Uid);
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if (ACPI_SUCCESS (Status))
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{
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STRCPY (Info->UniqueId, Uid.Buffer);
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Info->Valid |= ACPI_VALID_UID;
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}
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/*
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* Execute the _STA method and save the result
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* _STA is not always present
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*/
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Status = AcpiCmExecute_STA (Node, &DeviceStatus);
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if (ACPI_SUCCESS (Status))
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{
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Info->CurrentStatus = DeviceStatus;
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Info->Valid |= ACPI_VALID_STA;
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}
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/*
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* Execute the _ADR method and save result if successful
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* _ADR is not always present
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*/
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Status = AcpiCmEvaluateNumericObject (METHOD_NAME__ADR,
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Node, &Address);
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if (ACPI_SUCCESS (Status))
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{
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Info->Address = Address;
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Info->Valid |= ACPI_VALID_ADR;
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}
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return (AE_OK);
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}
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