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 - 2019, 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 #include "acinterp.h"
  50
  51 #define _COMPONENT          ACPI_DISPATCHER
  52         ACPI_MODULE_NAME    ("dsinit")
  53
  54
  55 /* Local prototypes */
  56
  57 static ACPI_STATUS
  58 AcpiDsInitOneObject (
  59     ACPI_HANDLE             ObjHandle,
  60     UINT32                  Level,
  61     void                    *Context,
  62     void                    **ReturnValue);
  63
  64
  65 /*******************************************************************************
  66  *
  67  * FUNCTION:    AcpiDsInitOneObject
  68  *
  69  * PARAMETERS:  ObjHandle       - Node for the object
  70  *              Level           - Current nesting level
  71  *              Context         - Points to a init info struct
  72  *              ReturnValue     - Not used
  73  *
  74  * RETURN:      Status
  75  *
  76  * DESCRIPTION: Callback from AcpiWalkNamespace. Invoked for every object
  77  *              within the namespace.
  78  *
  79  *              Currently, the only objects that require initialization are:
  80  *              1) Methods
  81  *              2) Operation Regions
  82  *
  83  ******************************************************************************/
  84
  85 static ACPI_STATUS
  86 AcpiDsInitOneObject (
  87     ACPI_HANDLE             ObjHandle,
  88     UINT32                  Level,
  89     void                    *Context,
  90     void                    **ReturnValue)
  91 {
  92     ACPI_INIT_WALK_INFO     *Info = (ACPI_INIT_WALK_INFO *) Context;
  93     ACPI_NAMESPACE_NODE     *Node = (ACPI_NAMESPACE_NODE *) ObjHandle;
  94     ACPI_STATUS             Status;
  95     ACPI_OPERAND_OBJECT     *ObjDesc;
  96
  97
  98     ACPI_FUNCTION_ENTRY ();
  99
 100
 101     /*
 102      * We are only interested in NS nodes owned by the table that
 103      * was just loaded
 104      */
 105     if (Node->OwnerId != Info->OwnerId)
 106     {
 107         return (AE_OK);
 108     }
 109
 110     Info->ObjectCount++;
 111
 112     /* And even then, we are only interested in a few object types */
 113
 114     switch (AcpiNsGetType (ObjHandle))
 115     {
 116     case ACPI_TYPE_REGION:
 117
 118         Status = AcpiDsInitializeRegion (ObjHandle);
 119         if (ACPI_FAILURE (Status))
 120         {
 121             ACPI_EXCEPTION ((AE_INFO, Status,
 122                 "During Region initialization %p [%4.4s]",
 123                 ObjHandle, AcpiUtGetNodeName (ObjHandle)));
 124         }
 125
 126         Info->OpRegionCount++;
 127         break;
 128
 129     case ACPI_TYPE_METHOD:
 130         /*
 131          * Auto-serialization support. We will examine each method that is
 132          * NotSerialized to determine if it creates any Named objects. If
 133          * it does, it will be marked serialized to prevent problems if
 134          * the method is entered by two or more threads and an attempt is
 135          * made to create the same named object twice -- which results in
 136          * an AE_ALREADY_EXISTS exception and method abort.
 137          */
 138         Info->MethodCount++;
 139         ObjDesc = AcpiNsGetAttachedObject (Node);
 140         if (!ObjDesc)
 141         {
 142             break;
 143         }
 144
 145         /* Ignore if already serialized */
 146
 147         if (ObjDesc->Method.InfoFlags & ACPI_METHOD_SERIALIZED)
 148         {
 149             Info->SerialMethodCount++;
 150             break;
 151         }
 152
 153         if (AcpiGbl_AutoSerializeMethods)
 154         {
 155             /* Parse/scan method and serialize it if necessary */
 156
 157             AcpiDsAutoSerializeMethod (Node, ObjDesc);
 158             if (ObjDesc->Method.InfoFlags & ACPI_METHOD_SERIALIZED)
 159             {
 160                 /* Method was just converted to Serialized */
 161
 162                 Info->SerialMethodCount++;
 163                 Info->SerializedMethodCount++;
 164                 break;
 165             }
 166         }
 167
 168         Info->NonSerialMethodCount++;
 169         break;
 170
 171     case ACPI_TYPE_DEVICE:
 172
 173         Info->DeviceCount++;
 174         break;
 175
 176     default:
 177
 178         break;
 179     }
 180
 181     /*
 182      * We ignore errors from above, and always return OK, since
 183      * we don't want to abort the walk on a single error.
 184      */
 185     return (AE_OK);
 186 }
 187
 188
 189 /*******************************************************************************
 190  *
 191  * FUNCTION:    AcpiDsInitializeObjects
 192  *
 193  * PARAMETERS:  TableDesc       - Descriptor for parent ACPI table
 194  *              StartNode       - Root of subtree to be initialized.
 195  *
 196  * RETURN:      Status
 197  *
 198  * DESCRIPTION: Walk the namespace starting at "StartNode" and perform any
 199  *              necessary initialization on the objects found therein
 200  *
 201  ******************************************************************************/
 202
 203 ACPI_STATUS
 204 AcpiDsInitializeObjects (
 205     UINT32                  TableIndex,
 206     ACPI_NAMESPACE_NODE     *StartNode)
 207 {
 208     ACPI_STATUS             Status;
 209     ACPI_INIT_WALK_INFO     Info;
 210     ACPI_TABLE_HEADER       *Table;
 211     ACPI_OWNER_ID           OwnerId;
 212
 213
 214     ACPI_FUNCTION_TRACE (DsInitializeObjects);
 215
 216
 217     Status = AcpiTbGetOwnerId (TableIndex, &OwnerId);
 218     if (ACPI_FAILURE (Status))
 219     {
 220         return_ACPI_STATUS (Status);
 221     }
 222
 223     ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 224         "**** Starting initialization of namespace objects ****\n"));
 225
 226     /* Set all init info to zero */
 227
 228     memset (&Info, 0, sizeof (ACPI_INIT_WALK_INFO));
 229
 230     Info.OwnerId = OwnerId;
 231     Info.TableIndex = TableIndex;
 232
 233     /* Walk entire namespace from the supplied root */
 234
 235     /*
 236      * We don't use AcpiWalkNamespace since we do not want to acquire
 237      * the namespace reader lock.
 238      */
 239     Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, StartNode, ACPI_UINT32_MAX,
 240         ACPI_NS_WALK_NO_UNLOCK, AcpiDsInitOneObject, NULL, &Info, NULL);
 241     if (ACPI_FAILURE (Status))
 242     {
 243         ACPI_EXCEPTION ((AE_INFO, Status, "During WalkNamespace"));
 244     }
 245
 246     Status = AcpiGetTableByIndex (TableIndex, &Table);
 247     if (ACPI_FAILURE (Status))
 248     {
 249         return_ACPI_STATUS (Status);
 250     }
 251
 252     /* DSDT is always the first AML table */
 253
 254     if (ACPI_COMPARE_NAMESEG (Table->Signature, ACPI_SIG_DSDT))
 255     {
 256         ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
 257             "\nInitializing Namespace objects:\n"));
 258     }
 259
 260     /* Summary of objects initialized */
 261
 262     ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
 263         "Table [%4.4s: %-8.8s] (id %.2X) - %4u Objects with %3u Devices, "
 264         "%3u Regions, %4u Methods (%u/%u/%u Serial/Non/Cvt)\n",
 265         Table->Signature, Table->OemTableId, OwnerId, Info.ObjectCount,
 266         Info.DeviceCount,Info.OpRegionCount, Info.MethodCount,
 267         Info.SerialMethodCount, Info.NonSerialMethodCount,
 268         Info.SerializedMethodCount));
 269
 270     ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "%u Methods, %u Regions\n",
 271         Info.MethodCount, Info.OpRegionCount));
 272
 273     return_ACPI_STATUS (AE_OK);
 274 }