drivers/acpi/dispatcher/dsinit.c

   1 /******************************************************************************
   2  *
   3  * Module Name: dsinit - Object initialization namespace walk
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2008, 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/acpi.h>
  45 #include <acpi/acdispat.h>
  46 #include <acpi/acnamesp.h>
  47 #include <acpi/actables.h>
  48
  49 #define _COMPONENT          ACPI_DISPATCHER
  50 ACPI_MODULE_NAME("dsinit")
  51
  52 /* Local prototypes */
  53 static acpi_status
  54 acpi_ds_init_one_object(acpi_handle obj_handle,
  55                         u32 level, void *context, void **return_value);
  56
  57 /*******************************************************************************
  58  *
  59  * FUNCTION:    acpi_ds_init_one_object
  60  *
  61  * PARAMETERS:  obj_handle      - Node for the object
  62  *              Level           - Current nesting level
  63  *              Context         - Points to a init info struct
  64  *              return_value    - Not used
  65  *
  66  * RETURN:      Status
  67  *
  68  * DESCRIPTION: Callback from acpi_walk_namespace. Invoked for every object
  69  *              within the namespace.
  70  *
  71  *              Currently, the only objects that require initialization are:
  72  *              1) Methods
  73  *              2) Operation Regions
  74  *
  75  ******************************************************************************/
  76
  77 static acpi_status
  78 acpi_ds_init_one_object(acpi_handle obj_handle,
  79                         u32 level, void *context, void **return_value)
  80 {
  81         struct acpi_init_walk_info *info =
  82             (struct acpi_init_walk_info *)context;
  83         struct acpi_namespace_node *node =
  84             (struct acpi_namespace_node *)obj_handle;
  85         acpi_object_type type;
  86         acpi_status status;
  87
  88         ACPI_FUNCTION_ENTRY();
  89
  90         /*
  91          * We are only interested in NS nodes owned by the table that
  92          * was just loaded
  93          */
  94         if (node->owner_id != info->owner_id) {
  95                 return (AE_OK);
  96         }
  97
  98         info->object_count++;
  99
 100         /* And even then, we are only interested in a few object types */
 101
 102         type = acpi_ns_get_type(obj_handle);
 103
 104         switch (type) {
 105         case ACPI_TYPE_REGION:
 106
 107                 status = acpi_ds_initialize_region(obj_handle);
 108                 if (ACPI_FAILURE(status)) {
 109                         ACPI_EXCEPTION((AE_INFO, status,
 110                                         "During Region initialization %p [%4.4s]",
 111                                         obj_handle,
 112                                         acpi_ut_get_node_name(obj_handle)));
 113                 }
 114
 115                 info->op_region_count++;
 116                 break;
 117
 118         case ACPI_TYPE_METHOD:
 119
 120                 info->method_count++;
 121                 break;
 122
 123         case ACPI_TYPE_DEVICE:
 124
 125                 info->device_count++;
 126                 break;
 127
 128         default:
 129                 break;
 130         }
 131
 132         /*
 133          * We ignore errors from above, and always return OK, since
 134          * we don't want to abort the walk on a single error.
 135          */
 136         return (AE_OK);
 137 }
 138
 139 /*******************************************************************************
 140  *
 141  * FUNCTION:    acpi_ds_initialize_objects
 142  *
 143  * PARAMETERS:  table_desc      - Descriptor for parent ACPI table
 144  *              start_node      - Root of subtree to be initialized.
 145  *
 146  * RETURN:      Status
 147  *
 148  * DESCRIPTION: Walk the namespace starting at "StartNode" and perform any
 149  *              necessary initialization on the objects found therein
 150  *
 151  ******************************************************************************/
 152
 153 acpi_status
 154 acpi_ds_initialize_objects(u32 table_index,
 155                            struct acpi_namespace_node * start_node)
 156 {
 157         acpi_status status;
 158         struct acpi_init_walk_info info;
 159         struct acpi_table_header *table;
 160         acpi_owner_id owner_id;
 161
 162         ACPI_FUNCTION_TRACE(ds_initialize_objects);
 163
 164         status = acpi_tb_get_owner_id(table_index, &owner_id);
 165         if (ACPI_FAILURE(status)) {
 166                 return_ACPI_STATUS(status);
 167         }
 168
 169         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 170                           "**** Starting initialization of namespace objects ****\n"));
 171         ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, "Parsing all Control Methods:"));
 172
 173         info.method_count = 0;
 174         info.op_region_count = 0;
 175         info.object_count = 0;
 176         info.device_count = 0;
 177         info.table_index = table_index;
 178         info.owner_id = owner_id;
 179
 180         /* Walk entire namespace from the supplied root */
 181
 182         status = acpi_walk_namespace(ACPI_TYPE_ANY, start_node, ACPI_UINT32_MAX,
 183                                      acpi_ds_init_one_object, &info, NULL);
 184         if (ACPI_FAILURE(status)) {
 185                 ACPI_EXCEPTION((AE_INFO, status, "During WalkNamespace"));
 186         }
 187
 188         status = acpi_get_table_by_index(table_index, &table);
 189         if (ACPI_FAILURE(status)) {
 190                 return_ACPI_STATUS(status);
 191         }
 192
 193         ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
 194                               "\nTable [%4.4s](id %4.4X) - %hd Objects with %hd Devices %hd Methods %hd Regions\n",
 195                               table->signature, owner_id, info.object_count,
 196                               info.device_count, info.method_count,
 197                               info.op_region_count));
 198
 199         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 200                           "%hd Methods, %hd Regions\n", info.method_count,
 201                           info.op_region_count));
 202
 203         return_ACPI_STATUS(AE_OK);
 204 }