651 lines
19 KiB
C
651 lines
19 KiB
C
/*******************************************************************************
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*
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* Module Name: nsalloc - Namespace allocation and deletion utilities
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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 - 2010, 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 __NSALLOC_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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#define _COMPONENT ACPI_NAMESPACE
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ACPI_MODULE_NAME ("nsalloc")
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsCreateNode
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*
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* PARAMETERS: Name - Name of the new node (4 char ACPI name)
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*
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* RETURN: New namespace node (Null on failure)
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*
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* DESCRIPTION: Create a namespace node
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*
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******************************************************************************/
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ACPI_NAMESPACE_NODE *
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AcpiNsCreateNode (
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UINT32 Name)
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{
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ACPI_NAMESPACE_NODE *Node;
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#ifdef ACPI_DBG_TRACK_ALLOCATIONS
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UINT32 Temp;
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#endif
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ACPI_FUNCTION_TRACE (NsCreateNode);
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Node = AcpiOsAcquireObject (AcpiGbl_NamespaceCache);
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if (!Node)
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{
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return_PTR (NULL);
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}
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ACPI_MEM_TRACKING (AcpiGbl_NsNodeList->TotalAllocated++);
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#ifdef ACPI_DBG_TRACK_ALLOCATIONS
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Temp = AcpiGbl_NsNodeList->TotalAllocated -
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AcpiGbl_NsNodeList->TotalFreed;
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if (Temp > AcpiGbl_NsNodeList->MaxOccupied)
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{
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AcpiGbl_NsNodeList->MaxOccupied = Temp;
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}
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#endif
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Node->Name.Integer = Name;
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ACPI_SET_DESCRIPTOR_TYPE (Node, ACPI_DESC_TYPE_NAMED);
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return_PTR (Node);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsDeleteNode
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*
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* PARAMETERS: Node - Node to be deleted
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*
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* RETURN: None
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*
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* DESCRIPTION: Delete a namespace node. All node deletions must come through
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* here. Detaches any attached objects, including any attached
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* data. If a handler is associated with attached data, it is
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* invoked before the node is deleted.
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*
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******************************************************************************/
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void
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AcpiNsDeleteNode (
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ACPI_NAMESPACE_NODE *Node)
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{
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ACPI_OPERAND_OBJECT *ObjDesc;
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ACPI_FUNCTION_NAME (NsDeleteNode);
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/* Detach an object if there is one */
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AcpiNsDetachObject (Node);
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/*
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* Delete an attached data object if present (an object that was created
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* and attached via AcpiAttachData). Note: After any normal object is
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* detached above, the only possible remaining object is a data object.
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*/
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ObjDesc = Node->Object;
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if (ObjDesc &&
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(ObjDesc->Common.Type == ACPI_TYPE_LOCAL_DATA))
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{
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/* Invoke the attached data deletion handler if present */
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if (ObjDesc->Data.Handler)
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{
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ObjDesc->Data.Handler (Node, ObjDesc->Data.Pointer);
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}
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AcpiUtRemoveReference (ObjDesc);
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}
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/* Now we can delete the node */
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(void) AcpiOsReleaseObject (AcpiGbl_NamespaceCache, Node);
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ACPI_MEM_TRACKING (AcpiGbl_NsNodeList->TotalFreed++);
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ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "Node %p, Remaining %X\n",
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Node, AcpiGbl_CurrentNodeCount));
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsRemoveNode
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*
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* PARAMETERS: Node - Node to be removed/deleted
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*
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* RETURN: None
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*
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* DESCRIPTION: Remove (unlink) and delete a namespace node
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*
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******************************************************************************/
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void
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AcpiNsRemoveNode (
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ACPI_NAMESPACE_NODE *Node)
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{
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ACPI_NAMESPACE_NODE *ParentNode;
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ACPI_NAMESPACE_NODE *PrevNode;
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ACPI_NAMESPACE_NODE *NextNode;
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ACPI_FUNCTION_TRACE_PTR (NsRemoveNode, Node);
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ParentNode = Node->Parent;
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PrevNode = NULL;
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NextNode = ParentNode->Child;
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/* Find the node that is the previous peer in the parent's child list */
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while (NextNode != Node)
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{
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PrevNode = NextNode;
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NextNode = NextNode->Peer;
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}
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if (PrevNode)
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{
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/* Node is not first child, unlink it */
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PrevNode->Peer = Node->Peer;
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}
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else
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{
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/*
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* Node is first child (has no previous peer).
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* Link peer list to parent
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*/
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ParentNode->Child = Node->Peer;
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}
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/* Delete the node and any attached objects */
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AcpiNsDeleteNode (Node);
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return_VOID;
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsInstallNode
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*
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* PARAMETERS: WalkState - Current state of the walk
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* ParentNode - The parent of the new Node
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* Node - The new Node to install
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* Type - ACPI object type of the new Node
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*
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* RETURN: None
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*
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* DESCRIPTION: Initialize a new namespace node and install it amongst
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* its peers.
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*
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* Note: Current namespace lookup is linear search. This appears
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* to be sufficient as namespace searches consume only a small
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* fraction of the execution time of the ACPI subsystem.
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*
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******************************************************************************/
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void
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AcpiNsInstallNode (
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ACPI_WALK_STATE *WalkState,
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ACPI_NAMESPACE_NODE *ParentNode, /* Parent */
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ACPI_NAMESPACE_NODE *Node, /* New Child*/
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ACPI_OBJECT_TYPE Type)
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{
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ACPI_OWNER_ID OwnerId = 0;
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ACPI_NAMESPACE_NODE *ChildNode;
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ACPI_FUNCTION_TRACE (NsInstallNode);
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if (WalkState)
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{
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/*
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* Get the owner ID from the Walk state. The owner ID is used to
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* track table deletion and deletion of objects created by methods.
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*/
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OwnerId = WalkState->OwnerId;
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if ((WalkState->MethodDesc) &&
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(ParentNode != WalkState->MethodNode))
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{
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/*
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* A method is creating a new node that is not a child of the
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* method (it is non-local). Mark the executing method as having
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* modified the namespace. This is used for cleanup when the
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* method exits.
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*/
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WalkState->MethodDesc->Method.Flags |= AOPOBJ_MODIFIED_NAMESPACE;
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}
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}
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/* Link the new entry into the parent and existing children */
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Node->Peer = NULL;
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Node->Parent = ParentNode;
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ChildNode = ParentNode->Child;
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if (!ChildNode)
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{
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ParentNode->Child = Node;
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}
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else
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{
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/* Add node to the end of the peer list */
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while (ChildNode->Peer)
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{
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ChildNode = ChildNode->Peer;
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}
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ChildNode->Peer = Node;
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}
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/* Init the new entry */
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Node->OwnerId = OwnerId;
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Node->Type = (UINT8) Type;
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ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
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"%4.4s (%s) [Node %p Owner %X] added to %4.4s (%s) [Node %p]\n",
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AcpiUtGetNodeName (Node), AcpiUtGetTypeName (Node->Type), Node, OwnerId,
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AcpiUtGetNodeName (ParentNode), AcpiUtGetTypeName (ParentNode->Type),
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ParentNode));
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return_VOID;
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsDeleteChildren
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*
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* PARAMETERS: ParentNode - Delete this objects children
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*
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* RETURN: None.
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*
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* DESCRIPTION: Delete all children of the parent object. In other words,
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* deletes a "scope".
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*
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******************************************************************************/
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void
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AcpiNsDeleteChildren (
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ACPI_NAMESPACE_NODE *ParentNode)
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{
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ACPI_NAMESPACE_NODE *NextNode;
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ACPI_NAMESPACE_NODE *NodeToDelete;
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ACPI_FUNCTION_TRACE_PTR (NsDeleteChildren, ParentNode);
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if (!ParentNode)
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{
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return_VOID;
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}
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/* Deallocate all children at this level */
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NextNode = ParentNode->Child;
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while (NextNode)
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{
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/* Grandchildren should have all been deleted already */
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if (NextNode->Child)
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{
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ACPI_ERROR ((AE_INFO, "Found a grandchild! P=%p C=%p",
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ParentNode, NextNode));
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}
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/*
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* Delete this child node and move on to the next child in the list.
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* No need to unlink the node since we are deleting the entire branch.
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*/
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NodeToDelete = NextNode;
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NextNode = NextNode->Peer;
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AcpiNsDeleteNode (NodeToDelete);
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};
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/* Clear the parent's child pointer */
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ParentNode->Child = NULL;
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return_VOID;
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsDeleteNamespaceSubtree
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*
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* PARAMETERS: ParentNode - Root of the subtree to be deleted
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*
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* RETURN: None.
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*
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* DESCRIPTION: Delete a subtree of the namespace. This includes all objects
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* stored within the subtree.
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*
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******************************************************************************/
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void
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AcpiNsDeleteNamespaceSubtree (
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ACPI_NAMESPACE_NODE *ParentNode)
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{
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ACPI_NAMESPACE_NODE *ChildNode = NULL;
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UINT32 Level = 1;
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ACPI_FUNCTION_TRACE (NsDeleteNamespaceSubtree);
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if (!ParentNode)
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{
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return_VOID;
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}
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/*
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* Traverse the tree of objects until we bubble back up
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* to where we started.
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*/
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while (Level > 0)
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{
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/* Get the next node in this scope (NULL if none) */
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ChildNode = AcpiNsGetNextNode (ParentNode, ChildNode);
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if (ChildNode)
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{
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/* Found a child node - detach any attached object */
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AcpiNsDetachObject (ChildNode);
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/* Check if this node has any children */
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if (ChildNode->Child)
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{
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/*
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* There is at least one child of this node,
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* visit the node
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*/
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Level++;
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ParentNode = ChildNode;
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ChildNode = NULL;
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}
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}
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else
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{
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/*
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* No more children of this parent node.
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* Move up to the grandparent.
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*/
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Level--;
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/*
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* Now delete all of the children of this parent
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* all at the same time.
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*/
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AcpiNsDeleteChildren (ParentNode);
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/* New "last child" is this parent node */
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ChildNode = ParentNode;
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/* Move up the tree to the grandparent */
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ParentNode = ParentNode->Parent;
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}
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}
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return_VOID;
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsDeleteNamespaceByOwner
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*
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* PARAMETERS: OwnerId - All nodes with this owner will be deleted
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*
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* RETURN: Status
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*
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* DESCRIPTION: Delete entries within the namespace that are owned by a
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* specific ID. Used to delete entire ACPI tables. All
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* reference counts are updated.
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*
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* MUTEX: Locks namespace during deletion walk.
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*
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******************************************************************************/
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void
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AcpiNsDeleteNamespaceByOwner (
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ACPI_OWNER_ID OwnerId)
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{
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ACPI_NAMESPACE_NODE *ChildNode;
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ACPI_NAMESPACE_NODE *DeletionNode;
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ACPI_NAMESPACE_NODE *ParentNode;
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UINT32 Level;
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE_U32 (NsDeleteNamespaceByOwner, OwnerId);
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if (OwnerId == 0)
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{
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return_VOID;
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}
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/* Lock namespace for possible update */
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Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE (Status))
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{
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return_VOID;
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}
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DeletionNode = NULL;
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ParentNode = AcpiGbl_RootNode;
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ChildNode = NULL;
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Level = 1;
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/*
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* Traverse the tree of nodes until we bubble back up
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|
* to where we started.
|
|
*/
|
|
while (Level > 0)
|
|
{
|
|
/*
|
|
* Get the next child of this parent node. When ChildNode is NULL,
|
|
* the first child of the parent is returned
|
|
*/
|
|
ChildNode = AcpiNsGetNextNode (ParentNode, ChildNode);
|
|
|
|
if (DeletionNode)
|
|
{
|
|
AcpiNsDeleteChildren (DeletionNode);
|
|
AcpiNsRemoveNode (DeletionNode);
|
|
DeletionNode = NULL;
|
|
}
|
|
|
|
if (ChildNode)
|
|
{
|
|
if (ChildNode->OwnerId == OwnerId)
|
|
{
|
|
/* Found a matching child node - detach any attached object */
|
|
|
|
AcpiNsDetachObject (ChildNode);
|
|
}
|
|
|
|
/* Check if this node has any children */
|
|
|
|
if (ChildNode->Child)
|
|
{
|
|
/*
|
|
* There is at least one child of this node,
|
|
* visit the node
|
|
*/
|
|
Level++;
|
|
ParentNode = ChildNode;
|
|
ChildNode = NULL;
|
|
}
|
|
else if (ChildNode->OwnerId == OwnerId)
|
|
{
|
|
DeletionNode = ChildNode;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/*
|
|
* No more children of this parent node.
|
|
* Move up to the grandparent.
|
|
*/
|
|
Level--;
|
|
if (Level != 0)
|
|
{
|
|
if (ParentNode->OwnerId == OwnerId)
|
|
{
|
|
DeletionNode = ParentNode;
|
|
}
|
|
}
|
|
|
|
/* New "last child" is this parent node */
|
|
|
|
ChildNode = ParentNode;
|
|
|
|
/* Move up the tree to the grandparent */
|
|
|
|
ParentNode = ParentNode->Parent;
|
|
}
|
|
}
|
|
|
|
(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
|
|
return_VOID;
|
|
}
|
|
|
|
|