reactos/drivers/bus/acpi/acpica/dispatcher/dsinit.c

   1 /******************************************************************************
   2  *
   3  * Module Name: dsinit - Object initialization namespace walk
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2016, Intel Corp.
   9  * All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions, and the following disclaimer,
  16  *    without modification.
  17  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  18  *    substantially similar to the "NO WARRANTY" disclaimer below
  19  *    ("Disclaimer") and any redistribution must be conditioned upon
  20  *    including a substantially similar Disclaimer requirement for further
  21  *    binary redistribution.
  22  * 3. Neither the names of the above-listed copyright holders nor the names
  23  *    of any contributors may be used to endorse or promote products derived
  24  *    from this software without specific prior written permission.
  25  *
  26  * Alternatively, this software may be distributed under the terms of the
  27  * GNU General Public License ("GPL") version 2 as published by the Free
  28  * Software Foundation.
  29  *
  30  * NO WARRANTY
  31  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  32  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  33  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  34  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  35  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  36  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  37  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  38  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  39  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  40  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  41  * POSSIBILITY OF SUCH DAMAGES.
  42  */
  43
  44 #include "acpi.h"
  45 #include "accommon.h"
  46 #include "acdispat.h"
  47 #include "acnamesp.h"
  48 #include "actables.h"
  49
  50 #define _COMPONENT          ACPI_DISPATCHER
  51         ACPI_MODULE_NAME    ("dsinit")
  52
  53
  54 /* Local prototypes */
  55
  56 static ACPI_STATUS
  57 AcpiDsInitOneObject (
  58     ACPI_HANDLE             ObjHandle,
  59     UINT32                  Level,
  60     void                    *Context,
  61     void                    **ReturnValue);
  62
  63
  64 /*******************************************************************************
  65  *
  66  * FUNCTION:    AcpiDsInitOneObject
  67  *
  68  * PARAMETERS:  ObjHandle       - Node for the object
  69  *              Level           - Current nesting level
  70  *              Context         - Points to a init info struct
  71  *              ReturnValue     - Not used
  72  *
  73  * RETURN:      Status
  74  *
  75  * DESCRIPTION: Callback from AcpiWalkNamespace. Invoked for every object
  76  *              within the namespace.
  77  *
  78  *              Currently, the only objects that require initialization are:
  79  *              1) Methods
  80  *              2) Operation Regions
  81  *
  82  ******************************************************************************/
  83
  84 static ACPI_STATUS
  85 AcpiDsInitOneObject (
  86     ACPI_HANDLE             ObjHandle,
  87     UINT32                  Level,
  88     void                    *Context,
  89     void                    **ReturnValue)
  90 {
  91     ACPI_INIT_WALK_INFO     *Info = (ACPI_INIT_WALK_INFO *) Context;
  92     ACPI_NAMESPACE_NODE     *Node = (ACPI_NAMESPACE_NODE *) ObjHandle;
  93     ACPI_STATUS             Status;
  94     ACPI_OPERAND_OBJECT     *ObjDesc;
  95
  96
  97     ACPI_FUNCTION_ENTRY ();
  98
  99
 100     /*
 101      * We are only interested in NS nodes owned by the table that
 102      * was just loaded
 103      */
 104     if (Node->OwnerId != Info->OwnerId)
 105     {
 106         return (AE_OK);
 107     }
 108
 109     Info->ObjectCount++;
 110
 111     /* And even then, we are only interested in a few object types */
 112
 113     switch (AcpiNsGetType (ObjHandle))
 114     {
 115     case ACPI_TYPE_REGION:
 116
 117         Status = AcpiDsInitializeRegion (ObjHandle);
 118         if (ACPI_FAILURE (Status))
 119         {
 120             ACPI_EXCEPTION ((AE_INFO, Status,
 121                 "During Region initialization %p [%4.4s]",
 122                 ObjHandle, AcpiUtGetNodeName (ObjHandle)));
 123         }
 124
 125         Info->OpRegionCount++;
 126         break;
 127
 128     case ACPI_TYPE_METHOD:
 129         /*
 130          * Auto-serialization support. We will examine each method that is
 131          * NotSerialized to determine if it creates any Named objects. If
 132          * it does, it will be marked serialized to prevent problems if
 133          * the method is entered by two or more threads and an attempt is
 134          * made to create the same named object twice -- which results in
 135          * an AE_ALREADY_EXISTS exception and method abort.
 136          */
 137         Info->MethodCount++;
 138         ObjDesc = AcpiNsGetAttachedObject (Node);
 139         if (!ObjDesc)
 140         {
 141             break;
 142         }
 143
 144         /* Ignore if already serialized */
 145
 146         if (ObjDesc->Method.InfoFlags & ACPI_METHOD_SERIALIZED)
 147         {
 148             Info->SerialMethodCount++;
 149             break;
 150         }
 151
 152         if (AcpiGbl_AutoSerializeMethods)
 153         {
 154             /* Parse/scan method and serialize it if necessary */
 155
 156             AcpiDsAutoSerializeMethod (Node, ObjDesc);
 157             if (ObjDesc->Method.InfoFlags & ACPI_METHOD_SERIALIZED)
 158             {
 159                 /* Method was just converted to Serialized */
 160
 161                 Info->SerialMethodCount++;
 162                 Info->SerializedMethodCount++;
 163                 break;
 164             }
 165         }
 166
 167         Info->NonSerialMethodCount++;
 168         break;
 169
 170     case ACPI_TYPE_DEVICE:
 171
 172         Info->DeviceCount++;
 173         break;
 174
 175     default:
 176
 177         break;
 178     }
 179
 180     /*
 181      * We ignore errors from above, and always return OK, since
 182      * we don't want to abort the walk on a single error.
 183      */
 184     return (AE_OK);
 185 }
 186
 187
 188 /*******************************************************************************
 189  *
 190  * FUNCTION:    AcpiDsInitializeObjects
 191  *
 192  * PARAMETERS:  TableDesc       - Descriptor for parent ACPI table
 193  *              StartNode       - Root of subtree to be initialized.
 194  *
 195  * RETURN:      Status
 196  *
 197  * DESCRIPTION: Walk the namespace starting at "StartNode" and perform any
 198  *              necessary initialization on the objects found therein
 199  *
 200  ******************************************************************************/
 201
 202 ACPI_STATUS
 203 AcpiDsInitializeObjects (
 204     UINT32                  TableIndex,
 205     ACPI_NAMESPACE_NODE     *StartNode)
 206 {
 207     ACPI_STATUS             Status;
 208     ACPI_INIT_WALK_INFO     Info;
 209     ACPI_TABLE_HEADER       *Table;
 210     ACPI_OWNER_ID           OwnerId;
 211
 212
 213     ACPI_FUNCTION_TRACE (DsInitializeObjects);
 214
 215
 216     Status = AcpiTbGetOwnerId (TableIndex, &OwnerId);
 217     if (ACPI_FAILURE (Status))
 218     {
 219         return_ACPI_STATUS (Status);
 220     }
 221
 222     ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 223         "**** Starting initialization of namespace objects ****\n"));
 224
 225     /* Set all init info to zero */
 226
 227     memset (&Info, 0, sizeof (ACPI_INIT_WALK_INFO));
 228
 229     Info.OwnerId = OwnerId;
 230     Info.TableIndex = TableIndex;
 231
 232     /* Walk entire namespace from the supplied root */
 233
 234     Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
 235     if (ACPI_FAILURE (Status))
 236     {
 237         return_ACPI_STATUS (Status);
 238     }
 239
 240     /*
 241      * We don't use AcpiWalkNamespace since we do not want to acquire
 242      * the namespace reader lock.
 243      */
 244     Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, StartNode, ACPI_UINT32_MAX,
 245         ACPI_NS_WALK_UNLOCK, AcpiDsInitOneObject, NULL, &Info, NULL);
 246     if (ACPI_FAILURE (Status))
 247     {
 248         ACPI_EXCEPTION ((AE_INFO, Status, "During WalkNamespace"));
 249     }
 250     (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
 251
 252     Status = AcpiGetTableByIndex (TableIndex, &Table);
 253     if (ACPI_FAILURE (Status))
 254     {
 255         return_ACPI_STATUS (Status);
 256     }
 257
 258     /* DSDT is always the first AML table */
 259
 260     if (ACPI_COMPARE_NAME (Table->Signature, ACPI_SIG_DSDT))
 261     {
 262         ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
 263             "\nInitializing Namespace objects:\n"));
 264     }
 265
 266     /* Summary of objects initialized */
 267
 268     ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
 269         "Table [%4.4s: %-8.8s] (id %.2X) - %4u Objects with %3u Devices, "
 270         "%3u Regions, %4u Methods (%u/%u/%u Serial/Non/Cvt)\n",
 271         Table->Signature, Table->OemTableId, OwnerId, Info.ObjectCount,
 272         Info.DeviceCount,Info.OpRegionCount, Info.MethodCount,
 273         Info.SerialMethodCount, Info.NonSerialMethodCount,
 274         Info.SerializedMethodCount));
 275
 276     ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "%u Methods, %u Regions\n",
 277         Info.MethodCount, Info.OpRegionCount));
 278
 279     return_ACPI_STATUS (AE_OK);
 280 }