drivers/acpica/dsinit.c

0001 /******************************************************************************
0002  *
0003  * Module Name: dsinit - Object initialization namespace walk
0004  *
0005  *****************************************************************************/
0006
0007 /******************************************************************************
0008  *
0009  * 1. Copyright Notice
0010  *
0011  * Some or all of this work - Copyright (c) 1999 - 2009, Intel Corp.
0012  * All rights reserved.
0013  *
0014  * 2. License
0015  *
0016  * 2.1. This is your license from Intel Corp. under its intellectual property
0017  * rights.  You may have additional license terms from the party that provided
0018  * you this software, covering your right to use that party's intellectual
0019  * property rights.
0020  *
0021  * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
0022  * copy of the source code appearing in this file ("Covered Code") an
0023  * irrevocable, perpetual, worldwide license under Intel's copyrights in the
0024  * base code distributed originally by Intel ("Original Intel Code") to copy,
0025  * make derivatives, distribute, use and display any portion of the Covered
0026  * Code in any form, with the right to sublicense such rights; and
0027  *
0028  * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
0029  * license (with the right to sublicense), under only those claims of Intel
0030  * patents that are infringed by the Original Intel Code, to make, use, sell,
0031  * offer to sell, and import the Covered Code and derivative works thereof
0032  * solely to the minimum extent necessary to exercise the above copyright
0033  * license, and in no event shall the patent license extend to any additions
0034  * to or modifications of the Original Intel Code.  No other license or right
0035  * is granted directly or by implication, estoppel or otherwise;
0036  *
0037  * The above copyright and patent license is granted only if the following
0038  * conditions are met:
0039  *
0040  * 3. Conditions
0041  *
0042  * 3.1. Redistribution of Source with Rights to Further Distribute Source.
0043  * Redistribution of source code of any substantial portion of the Covered
0044  * Code or modification with rights to further distribute source must include
0045  * the above Copyright Notice, the above License, this list of Conditions,
0046  * and the following Disclaimer and Export Compliance provision.  In addition,
0047  * Licensee must cause all Covered Code to which Licensee contributes to
0048  * contain a file documenting the changes Licensee made to create that Covered
0049  * Code and the date of any change.  Licensee must include in that file the
0050  * documentation of any changes made by any predecessor Licensee.  Licensee
0051  * must include a prominent statement that the modification is derived,
0052  * directly or indirectly, from Original Intel Code.
0053  *
0054  * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
0055  * Redistribution of source code of any substantial portion of the Covered
0056  * Code or modification without rights to further distribute source must
0057  * include the following Disclaimer and Export Compliance provision in the
0058  * documentation and/or other materials provided with distribution.  In
0059  * addition, Licensee may not authorize further sublicense of source of any
0060  * portion of the Covered Code, and must include terms to the effect that the
0061  * license from Licensee to its licensee is limited to the intellectual
0062  * property embodied in the software Licensee provides to its licensee, and
0063  * not to intellectual property embodied in modifications its licensee may
0064  * make.
0065  *
0066  * 3.3. Redistribution of Executable. Redistribution in executable form of any
0067  * substantial portion of the Covered Code or modification must reproduce the
0068  * above Copyright Notice, and the following Disclaimer and Export Compliance
0069  * provision in the documentation and/or other materials provided with the
0070  * distribution.
0071  *
0072  * 3.4. Intel retains all right, title, and interest in and to the Original
0073  * Intel Code.
0074  *
0075  * 3.5. Neither the name Intel nor any other trademark owned or controlled by
0076  * Intel shall be used in advertising or otherwise to promote the sale, use or
0077  * other dealings in products derived from or relating to the Covered Code
0078  * without prior written authorization from Intel.
0079  *
0080  * 4. Disclaimer and Export Compliance
0081  *
0082  * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
0083  * HERE.  ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
0084  * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT,  ASSISTANCE,
0085  * INSTALLATION, TRAINING OR OTHER SERVICES.  INTEL WILL NOT PROVIDE ANY
0086  * UPDATES, ENHANCEMENTS OR EXTENSIONS.  INTEL SPECIFICALLY DISCLAIMS ANY
0087  * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
0088  * PARTICULAR PURPOSE.
0089  *
0090  * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
0091  * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
0092  * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
0093  * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
0094  * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
0095  * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.  THESE LIMITATIONS
0096  * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
0097  * LIMITED REMEDY.
0098  *
0099  * 4.3. Licensee shall not export, either directly or indirectly, any of this
0100  * software or system incorporating such software without first obtaining any
0101  * required license or other approval from the U. S. Department of Commerce or
0102  * any other agency or department of the United States Government.  In the
0103  * event Licensee exports any such software from the United States or
0104  * re-exports any such software from a foreign destination, Licensee shall
0105  * ensure that the distribution and export/re-export of the software is in
0106  * compliance with all laws, regulations, orders, or other restrictions of the
0107  * U.S. Export Administration Regulations. Licensee agrees that neither it nor
0108  * any of its subsidiaries will export/re-export any technical data, process,
0109  * software, or service, directly or indirectly, to any country for which the
0110  * United States government or any agency thereof requires an export license,
0111  * other governmental approval, or letter of assurance, without first obtaining
0112  * such license, approval or letter.
0113  *
0114  *****************************************************************************/
0115
0116 #define __DSINIT_C__
0117
0118 #include "acpi.h"
0119 #include "accommon.h"
0120 #include "acdispat.h"
0121 #include "acnamesp.h"
0122 #include "actables.h"
0123
0124 #define _COMPONENT          ACPI_DISPATCHER
0125         ACPI_MODULE_NAME    ("dsinit")
0126
0127 /* Local prototypes */
0128
0129 static ACPI_STATUS
0130 AcpiDsInitOneObject (
0131     ACPI_HANDLE             ObjHandle,
0132     UINT32                  Level,
0133     void                    *Context,
0134     void                    **ReturnValue);
0135
0136
0137 /*******************************************************************************
0138  *
0139  * FUNCTION:    AcpiDsInitOneObject
0140  *
0141  * PARAMETERS:  ObjHandle       - Node for the object
0142  *              Level           - Current nesting level
0143  *              Context         - Points to a init info struct
0144  *              ReturnValue     - Not used
0145  *
0146  * RETURN:      Status
0147  *
0148  * DESCRIPTION: Callback from AcpiWalkNamespace.  Invoked for every object
0149  *              within the namespace.
0150  *
0151  *              Currently, the only objects that require initialization are:
0152  *              1) Methods
0153  *              2) Operation Regions
0154  *
0155  ******************************************************************************/
0156
0157 static ACPI_STATUS
0158 AcpiDsInitOneObject (
0159     ACPI_HANDLE             ObjHandle,
0160     UINT32                  Level,
0161     void                    *Context,
0162     void                    **ReturnValue)
0163 {
0164     ACPI_INIT_WALK_INFO     *Info = (ACPI_INIT_WALK_INFO *) Context;
0165     ACPI_NAMESPACE_NODE     *Node = (ACPI_NAMESPACE_NODE *) ObjHandle;
0166     ACPI_OBJECT_TYPE        Type;
0167     ACPI_STATUS             Status;
0168
0169
0170     ACPI_FUNCTION_ENTRY ();
0171
0172
0173     /*
0174      * We are only interested in NS nodes owned by the table that
0175      * was just loaded
0176      */
0177     if (Node->OwnerId != Info->OwnerId)
0178     {
0179         return (AE_OK);
0180     }
0181
0182     Info->ObjectCount++;
0183
0184     /* And even then, we are only interested in a few object types */
0185
0186     Type = AcpiNsGetType (ObjHandle);
0187
0188     switch (Type)
0189     {
0190     case ACPI_TYPE_REGION:
0191
0192         Status = AcpiDsInitializeRegion (ObjHandle);
0193         if (ACPI_FAILURE (Status))
0194         {
0195             ACPI_EXCEPTION ((AE_INFO, Status,
0196                 "During Region initialization %p [%4.4s]",
0197                 ObjHandle, AcpiUtGetNodeName (ObjHandle)));
0198         }
0199
0200         Info->OpRegionCount++;
0201         break;
0202
0203
0204     case ACPI_TYPE_METHOD:
0205
0206         Info->MethodCount++;
0207         break;
0208
0209
0210     case ACPI_TYPE_DEVICE:
0211
0212         Info->DeviceCount++;
0213         break;
0214
0215
0216     default:
0217         break;
0218     }
0219
0220     /*
0221      * We ignore errors from above, and always return OK, since
0222      * we don't want to abort the walk on a single error.
0223      */
0224     return (AE_OK);
0225 }
0226
0227
0228 /*******************************************************************************
0229  *
0230  * FUNCTION:    AcpiDsInitializeObjects
0231  *
0232  * PARAMETERS:  TableDesc       - Descriptor for parent ACPI table
0233  *              StartNode       - Root of subtree to be initialized.
0234  *
0235  * RETURN:      Status
0236  *
0237  * DESCRIPTION: Walk the namespace starting at "StartNode" and perform any
0238  *              necessary initialization on the objects found therein
0239  *
0240  ******************************************************************************/
0241
0242 ACPI_STATUS
0243 AcpiDsInitializeObjects (
0244     UINT32                  TableIndex,
0245     ACPI_NAMESPACE_NODE     *StartNode)
0246 {
0247     ACPI_STATUS             Status;
0248     ACPI_INIT_WALK_INFO     Info;
0249     ACPI_TABLE_HEADER       *Table;
0250     ACPI_OWNER_ID           OwnerId;
0251
0252
0253     ACPI_FUNCTION_TRACE (DsInitializeObjects);
0254
0255
0256     Status = AcpiTbGetOwnerId (TableIndex, &OwnerId);
0257     if (ACPI_FAILURE (Status))
0258     {
0259         return_ACPI_STATUS (Status);
0260     }
0261
0262     ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
0263         "**** Starting initialization of namespace objects ****\n"));
0264     ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, "Parsing all Control Methods:"));
0265
0266     Info.MethodCount    = 0;
0267     Info.OpRegionCount  = 0;
0268     Info.ObjectCount    = 0;
0269     Info.DeviceCount    = 0;
0270     Info.TableIndex     = TableIndex;
0271     Info.OwnerId        = OwnerId;
0272
0273     /* Walk entire namespace from the supplied root */
0274
0275     Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
0276     if (ACPI_FAILURE (Status))
0277     {
0278         return_ACPI_STATUS (Status);
0279     }
0280
0281     /*
0282      * We don't use AcpiWalkNamespace since we do not want to acquire
0283      * the namespace reader lock.
0284      */
0285     Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, StartNode, ACPI_UINT32_MAX,
0286                 ACPI_NS_WALK_UNLOCK, AcpiDsInitOneObject, &Info, NULL);
0287     if (ACPI_FAILURE (Status))
0288     {
0289         ACPI_EXCEPTION ((AE_INFO, Status, "During WalkNamespace"));
0290     }
0291     (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
0292
0293     Status = AcpiGetTableByIndex (TableIndex, &Table);
0294     if (ACPI_FAILURE (Status))
0295     {
0296         return_ACPI_STATUS (Status);
0297     }
0298
0299     ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
0300         "\nTable [%4.4s](id %4.4X) - %hd Objects with %hd Devices %hd Methods %hd Regions\n",
0301         Table->Signature, OwnerId, Info.ObjectCount,
0302         Info.DeviceCount, Info.MethodCount, Info.OpRegionCount));
0303
0304     ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
0305         "%hd Methods, %hd Regions\n", Info.MethodCount, Info.OpRegionCount));
0306
0307     return_ACPI_STATUS (AE_OK);
0308 }
0309
0310