Merge with /home/shaggy/git/linus-clean/
[linux-2.6] / drivers / acpi / dispatcher / dsinit.c
1 /******************************************************************************
2  *
3  * Module Name: dsinit - Object initialization namespace walk
4  *
5  *****************************************************************************/
6
7 /*
8  * Copyright (C) 2000 - 2005, 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
45 #include <acpi/acpi.h>
46 #include <acpi/acdispat.h>
47 #include <acpi/acnamesp.h>
48
49 #define _COMPONENT          ACPI_DISPATCHER
50          ACPI_MODULE_NAME    ("dsinit")
51
52 /* Local prototypes */
53
54 static acpi_status
55 acpi_ds_init_one_object (
56         acpi_handle                     obj_handle,
57         u32                             level,
58         void                            *context,
59         void                            **return_value);
60
61
62 /*******************************************************************************
63  *
64  * FUNCTION:    acpi_ds_init_one_object
65  *
66  * PARAMETERS:  obj_handle      - Node for the object
67  *              Level           - Current nesting level
68  *              Context         - Points to a init info struct
69  *              return_value    - Not used
70  *
71  * RETURN:      Status
72  *
73  * DESCRIPTION: Callback from acpi_walk_namespace. Invoked for every object
74  *              within the namespace.
75  *
76  *              Currently, the only objects that require initialization are:
77  *              1) Methods
78  *              2) Operation Regions
79  *
80  ******************************************************************************/
81
82 static acpi_status
83 acpi_ds_init_one_object (
84         acpi_handle                     obj_handle,
85         u32                             level,
86         void                            *context,
87         void                            **return_value)
88 {
89         acpi_object_type                type;
90         acpi_status                     status;
91         struct acpi_init_walk_info      *info = (struct acpi_init_walk_info *) context;
92
93
94         ACPI_FUNCTION_NAME ("ds_init_one_object");
95
96
97         /*
98          * We are only interested in objects owned by the table that
99          * was just loaded
100          */
101         if (((struct acpi_namespace_node *) obj_handle)->owner_id !=
102                         info->table_desc->table_id) {
103                 return (AE_OK);
104         }
105
106         info->object_count++;
107
108         /* And even then, we are only interested in a few object types */
109
110         type = acpi_ns_get_type (obj_handle);
111
112         switch (type) {
113         case ACPI_TYPE_REGION:
114
115                 status = acpi_ds_initialize_region (obj_handle);
116                 if (ACPI_FAILURE (status)) {
117                         ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
118                                 "Region %p [%4.4s] - Init failure, %s\n",
119                                 obj_handle, acpi_ut_get_node_name (obj_handle),
120                                 acpi_format_exception (status)));
121                 }
122
123                 info->op_region_count++;
124                 break;
125
126
127         case ACPI_TYPE_METHOD:
128
129                 info->method_count++;
130
131                 /*
132                  * Print a dot for each method unless we are going to print
133                  * the entire pathname
134                  */
135                 if (!(acpi_dbg_level & ACPI_LV_INIT_NAMES)) {
136                         ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, "."));
137                 }
138
139                 /*
140                  * Set the execution data width (32 or 64) based upon the
141                  * revision number of the parent ACPI table.
142                  * TBD: This is really for possible future support of integer width
143                  * on a per-table basis. Currently, we just use a global for the width.
144                  */
145                 if (info->table_desc->pointer->revision == 1) {
146                         ((struct acpi_namespace_node *) obj_handle)->flags |= ANOBJ_DATA_WIDTH_32;
147                 }
148
149                 /*
150                  * Always parse methods to detect errors, we will delete
151                  * the parse tree below
152                  */
153                 status = acpi_ds_parse_method (obj_handle);
154                 if (ACPI_FAILURE (status)) {
155                         ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
156                                 "Method %p [%4.4s] - parse failure, %s\n",
157                                 obj_handle, acpi_ut_get_node_name (obj_handle),
158                                 acpi_format_exception (status)));
159
160                         /* This parse failed, but we will continue parsing more methods */
161
162                         break;
163                 }
164
165                 /*
166                  * Delete the parse tree.  We simply re-parse the method
167                  * for every execution since there isn't much overhead
168                  */
169                 acpi_ns_delete_namespace_subtree (obj_handle);
170                 acpi_ns_delete_namespace_by_owner (
171                         ((struct acpi_namespace_node *) obj_handle)->object->method.owning_id);
172                 break;
173
174
175         case ACPI_TYPE_DEVICE:
176
177                 info->device_count++;
178                 break;
179
180
181         default:
182                 break;
183         }
184
185         /*
186          * We ignore errors from above, and always return OK, since
187          * we don't want to abort the walk on a single error.
188          */
189         return (AE_OK);
190 }
191
192
193 /*******************************************************************************
194  *
195  * FUNCTION:    acpi_ds_initialize_objects
196  *
197  * PARAMETERS:  table_desc      - Descriptor for parent ACPI table
198  *              start_node      - Root of subtree to be initialized.
199  *
200  * RETURN:      Status
201  *
202  * DESCRIPTION: Walk the namespace starting at "start_node" and perform any
203  *              necessary initialization on the objects found therein
204  *
205  ******************************************************************************/
206
207 acpi_status
208 acpi_ds_initialize_objects (
209         struct acpi_table_desc          *table_desc,
210         struct acpi_namespace_node      *start_node)
211 {
212         acpi_status                     status;
213         struct acpi_init_walk_info      info;
214
215
216         ACPI_FUNCTION_TRACE ("ds_initialize_objects");
217
218
219         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
220                 "**** Starting initialization of namespace objects ****\n"));
221         ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, "Parsing all Control Methods:"));
222
223         info.method_count   = 0;
224         info.op_region_count = 0;
225         info.object_count   = 0;
226         info.device_count   = 0;
227         info.table_desc     = table_desc;
228
229         /* Walk entire namespace from the supplied root */
230
231         status = acpi_walk_namespace (ACPI_TYPE_ANY, start_node, ACPI_UINT32_MAX,
232                           acpi_ds_init_one_object, &info, NULL);
233         if (ACPI_FAILURE (status)) {
234                 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "walk_namespace failed, %s\n",
235                         acpi_format_exception (status)));
236         }
237
238         ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
239                 "\nTable [%4.4s](id %4.4X) - %hd Objects with %hd Devices %hd Methods %hd Regions\n",
240                 table_desc->pointer->signature, table_desc->table_id, info.object_count,
241                 info.device_count, info.method_count, info.op_region_count));
242
243         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
244                 "%hd Methods, %hd Regions\n", info.method_count, info.op_region_count));
245
246         return_ACPI_STATUS (AE_OK);
247 }
248
249