1 /******************************************************************************
3 * Module Name: dsinit - Object initialization namespace walk
5 *****************************************************************************/
8 * Copyright (C) 2000 - 2012, Intel Corp.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
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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
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20 * including a substantially similar Disclaimer requirement for further
21 * binary redistribution.
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23 * of any contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
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
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44 #include <acpi/acpi.h>
50 #define _COMPONENT ACPI_DISPATCHER
51 ACPI_MODULE_NAME("dsinit")
53 /* Local prototypes */
55 acpi_ds_init_one_object(acpi_handle obj_handle,
56 u32 level, void *context, void **return_value);
58 /*******************************************************************************
60 * FUNCTION: acpi_ds_init_one_object
62 * PARAMETERS: obj_handle - Node for the object
63 * level - Current nesting level
64 * context - Points to a init info struct
65 * return_value - Not used
69 * DESCRIPTION: Callback from acpi_walk_namespace. Invoked for every object
70 * within the namespace.
72 * Currently, the only objects that require initialization are:
74 * 2) Operation Regions
76 ******************************************************************************/
79 acpi_ds_init_one_object(acpi_handle obj_handle,
80 u32 level, void *context, void **return_value)
82 struct acpi_init_walk_info *info =
83 (struct acpi_init_walk_info *)context;
84 struct acpi_namespace_node *node =
85 (struct acpi_namespace_node *)obj_handle;
86 acpi_object_type type;
89 ACPI_FUNCTION_ENTRY();
92 * We are only interested in NS nodes owned by the table that
95 if (node->owner_id != info->owner_id) {
101 /* And even then, we are only interested in a few object types */
103 type = acpi_ns_get_type(obj_handle);
106 case ACPI_TYPE_REGION:
108 status = acpi_ds_initialize_region(obj_handle);
109 if (ACPI_FAILURE(status)) {
110 ACPI_EXCEPTION((AE_INFO, status,
111 "During Region initialization %p [%4.4s]",
113 acpi_ut_get_node_name(obj_handle)));
116 info->op_region_count++;
119 case ACPI_TYPE_METHOD:
121 info->method_count++;
124 case ACPI_TYPE_DEVICE:
126 info->device_count++;
134 * We ignore errors from above, and always return OK, since
135 * we don't want to abort the walk on a single error.
140 /*******************************************************************************
142 * FUNCTION: acpi_ds_initialize_objects
144 * PARAMETERS: table_desc - Descriptor for parent ACPI table
145 * start_node - Root of subtree to be initialized.
149 * DESCRIPTION: Walk the namespace starting at "StartNode" and perform any
150 * necessary initialization on the objects found therein
152 ******************************************************************************/
155 acpi_ds_initialize_objects(u32 table_index,
156 struct acpi_namespace_node * start_node)
159 struct acpi_init_walk_info info;
160 struct acpi_table_header *table;
161 acpi_owner_id owner_id;
163 ACPI_FUNCTION_TRACE(ds_initialize_objects);
165 status = acpi_tb_get_owner_id(table_index, &owner_id);
166 if (ACPI_FAILURE(status)) {
167 return_ACPI_STATUS(status);
170 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
171 "**** Starting initialization of namespace objects ****\n"));
172 ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, "Parsing all Control Methods:"));
174 /* Set all init info to zero */
176 ACPI_MEMSET(&info, 0, sizeof(struct acpi_init_walk_info));
178 info.owner_id = owner_id;
179 info.table_index = table_index;
181 /* Walk entire namespace from the supplied root */
183 status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
184 if (ACPI_FAILURE(status)) {
185 return_ACPI_STATUS(status);
189 * We don't use acpi_walk_namespace since we do not want to acquire
190 * the namespace reader lock.
193 acpi_ns_walk_namespace(ACPI_TYPE_ANY, start_node, ACPI_UINT32_MAX,
194 ACPI_NS_WALK_UNLOCK, acpi_ds_init_one_object,
196 if (ACPI_FAILURE(status)) {
197 ACPI_EXCEPTION((AE_INFO, status, "During WalkNamespace"));
199 (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
201 status = acpi_get_table_by_index(table_index, &table);
202 if (ACPI_FAILURE(status)) {
203 return_ACPI_STATUS(status);
206 ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
207 "\nTable [%4.4s](id %4.4X) - %u Objects with %u Devices %u Methods %u Regions\n",
208 table->signature, owner_id, info.object_count,
209 info.device_count, info.method_count,
210 info.op_region_count));
212 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
213 "%u Methods, %u Regions\n", info.method_count,
214 info.op_region_count));
216 return_ACPI_STATUS(AE_OK);