drivers/acpi/dispatcher/dsinit.c

   1 /******************************************************************************
   2  *
   3  * Module Name: dsinit - Object initialization namespace walk
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2006, R. Byron Moore
   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/acpi.h>
  45 #include <acpi/acdispat.h>
  46 #include <acpi/acnamesp.h>
  47
  48 #define _COMPONENT          ACPI_DISPATCHER
  49 ACPI_MODULE_NAME("dsinit")
  50
  51 /* Local prototypes */
  52 static acpi_status
  53 acpi_ds_init_one_object(acpi_handle obj_handle,
  54                         u32 level, void *context, void **return_value);
  55
  56 /*******************************************************************************
  57  *
  58  * FUNCTION:    acpi_ds_init_one_object
  59  *
  60  * PARAMETERS:  obj_handle      - Node for the object
  61  *              Level           - Current nesting level
  62  *              Context         - Points to a init info struct
  63  *              return_value    - Not used
  64  *
  65  * RETURN:      Status
  66  *
  67  * DESCRIPTION: Callback from acpi_walk_namespace. Invoked for every object
  68  *              within the namespace.
  69  *
  70  *              Currently, the only objects that require initialization are:
  71  *              1) Methods
  72  *              2) Operation Regions
  73  *
  74  ******************************************************************************/
  75
  76 static acpi_status
  77 acpi_ds_init_one_object(acpi_handle obj_handle,
  78                         u32 level, void *context, void **return_value)
  79 {
  80         struct acpi_init_walk_info *info =
  81             (struct acpi_init_walk_info *)context;
  82         struct acpi_namespace_node *node =
  83             (struct acpi_namespace_node *)obj_handle;
  84         acpi_object_type type;
  85         acpi_status status;
  86
  87         ACPI_FUNCTION_ENTRY();
  88
  89         /*
  90          * We are only interested in NS nodes owned by the table that
  91          * was just loaded
  92          */
  93         if (node->owner_id != info->table_desc->owner_id) {
  94                 return (AE_OK);
  95         }
  96
  97         info->object_count++;
  98
  99         /* And even then, we are only interested in a few object types */
 100
 101         type = acpi_ns_get_type(obj_handle);
 102
 103         switch (type) {
 104         case ACPI_TYPE_REGION:
 105
 106                 status = acpi_ds_initialize_region(obj_handle);
 107                 if (ACPI_FAILURE(status)) {
 108                         ACPI_EXCEPTION((AE_INFO, status,
 109                                         "During Region initialization %p [%4.4s]",
 110                                         obj_handle,
 111                                         acpi_ut_get_node_name(obj_handle)));
 112                 }
 113
 114                 info->op_region_count++;
 115                 break;
 116
 117         case ACPI_TYPE_METHOD:
 118
 119                 info->method_count++;
 120                 break;
 121
 122         case ACPI_TYPE_DEVICE:
 123
 124                 info->device_count++;
 125                 break;
 126
 127         default:
 128                 break;
 129         }
 130
 131         /*
 132          * We ignore errors from above, and always return OK, since
 133          * we don't want to abort the walk on a single error.
 134          */
 135         return (AE_OK);
 136 }
 137
 138 /*******************************************************************************
 139  *
 140  * FUNCTION:    acpi_ds_initialize_objects
 141  *
 142  * PARAMETERS:  table_desc      - Descriptor for parent ACPI table
 143  *              start_node      - Root of subtree to be initialized.
 144  *
 145  * RETURN:      Status
 146  *
 147  * DESCRIPTION: Walk the namespace starting at "StartNode" and perform any
 148  *              necessary initialization on the objects found therein
 149  *
 150  ******************************************************************************/
 151
 152 acpi_status
 153 acpi_ds_initialize_objects(struct acpi_table_desc * table_desc,
 154                            struct acpi_namespace_node * start_node)
 155 {
 156         acpi_status status;
 157         struct acpi_init_walk_info info;
 158
 159         ACPI_FUNCTION_TRACE(ds_initialize_objects);
 160
 161         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 162                           "**** Starting initialization of namespace objects ****\n"));
 163         ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, "Parsing all Control Methods:"));
 164
 165         info.method_count = 0;
 166         info.op_region_count = 0;
 167         info.object_count = 0;
 168         info.device_count = 0;
 169         info.table_desc = table_desc;
 170
 171         /* Walk entire namespace from the supplied root */
 172
 173         status = acpi_walk_namespace(ACPI_TYPE_ANY, start_node, ACPI_UINT32_MAX,
 174                                      acpi_ds_init_one_object, &info, NULL);
 175         if (ACPI_FAILURE(status)) {
 176                 ACPI_EXCEPTION((AE_INFO, status, "During WalkNamespace"));
 177         }
 178
 179         ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
 180                               "\nTable [%4.4s](id %4.4X) - %hd Objects with %hd Devices %hd Methods %hd Regions\n",
 181                               table_desc->pointer->signature,
 182                               table_desc->owner_id, info.object_count,
 183                               info.device_count, info.method_count,
 184                               info.op_region_count));
 185
 186         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 187                           "%hd Methods, %hd Regions\n", info.method_count,
 188                           info.op_region_count));
 189
 190         return_ACPI_STATUS(AE_OK);
 191 }