1/******************************************************************************
2 *
3 * Module Name: dsinit - Object initialization namespace walk
4 *
5 *****************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2007, 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#include <acpi/actables.h>
48
49#define _COMPONENT          ACPI_DISPATCHER
50ACPI_MODULE_NAME("dsinit")
51
52/* Local prototypes */
53static acpi_status
54acpi_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
77static acpi_status
78acpi_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
153acpi_status
154acpi_ds_initialize_objects(acpi_native_uint 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}
205