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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: nsinit - namespace initialization | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
4a90c7e8 | 8 | * Copyright (C) 2000 - 2006, R. Byron Moore |
1da177e4 LT |
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 | ||
1da177e4 LT |
44 | #include <acpi/acpi.h> |
45 | #include <acpi/acnamesp.h> | |
46 | #include <acpi/acdispat.h> | |
47 | #include <acpi/acinterp.h> | |
48 | ||
49 | #define _COMPONENT ACPI_NAMESPACE | |
4be44fcd | 50 | ACPI_MODULE_NAME("nsinit") |
1da177e4 | 51 | |
44f6c012 | 52 | /* Local prototypes */ |
44f6c012 | 53 | static acpi_status |
4be44fcd LB |
54 | acpi_ns_init_one_object(acpi_handle obj_handle, |
55 | u32 level, void *context, void **return_value); | |
44f6c012 RM |
56 | |
57 | static acpi_status | |
4be44fcd LB |
58 | acpi_ns_init_one_device(acpi_handle obj_handle, |
59 | u32 nesting_level, void *context, void **return_value); | |
1da177e4 LT |
60 | |
61 | /******************************************************************************* | |
62 | * | |
63 | * FUNCTION: acpi_ns_initialize_objects | |
64 | * | |
65 | * PARAMETERS: None | |
66 | * | |
67 | * RETURN: Status | |
68 | * | |
69 | * DESCRIPTION: Walk the entire namespace and perform any necessary | |
70 | * initialization on the objects found therein | |
71 | * | |
72 | ******************************************************************************/ | |
73 | ||
4be44fcd | 74 | acpi_status acpi_ns_initialize_objects(void) |
1da177e4 | 75 | { |
4be44fcd LB |
76 | acpi_status status; |
77 | struct acpi_init_walk_info info; | |
1da177e4 | 78 | |
4be44fcd | 79 | ACPI_FUNCTION_TRACE("ns_initialize_objects"); |
1da177e4 | 80 | |
4be44fcd LB |
81 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, |
82 | "**** Starting initialization of namespace objects ****\n")); | |
83 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, | |
84 | "Completing Region/Field/Buffer/Package initialization:")); | |
1da177e4 LT |
85 | |
86 | /* Set all init info to zero */ | |
87 | ||
4be44fcd | 88 | ACPI_MEMSET(&info, 0, sizeof(struct acpi_init_walk_info)); |
1da177e4 LT |
89 | |
90 | /* Walk entire namespace from the supplied root */ | |
91 | ||
4be44fcd LB |
92 | status = acpi_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, |
93 | ACPI_UINT32_MAX, acpi_ns_init_one_object, | |
94 | &info, NULL); | |
95 | if (ACPI_FAILURE(status)) { | |
b8e4d893 | 96 | ACPI_EXCEPTION((AE_INFO, status, "During walk_namespace")); |
1da177e4 LT |
97 | } |
98 | ||
4be44fcd LB |
99 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, |
100 | "\nInitialized %hd/%hd Regions %hd/%hd Fields %hd/%hd Buffers %hd/%hd Packages (%hd nodes)\n", | |
101 | info.op_region_init, info.op_region_count, | |
102 | info.field_init, info.field_count, | |
103 | info.buffer_init, info.buffer_count, | |
104 | info.package_init, info.package_count, | |
105 | info.object_count)); | |
1da177e4 | 106 | |
4be44fcd LB |
107 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, |
108 | "%hd Control Methods found\n", info.method_count)); | |
109 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, | |
110 | "%hd Op Regions found\n", info.op_region_count)); | |
1da177e4 | 111 | |
4be44fcd | 112 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
113 | } |
114 | ||
1da177e4 LT |
115 | /******************************************************************************* |
116 | * | |
117 | * FUNCTION: acpi_ns_initialize_devices | |
118 | * | |
119 | * PARAMETERS: None | |
120 | * | |
121 | * RETURN: acpi_status | |
122 | * | |
123 | * DESCRIPTION: Walk the entire namespace and initialize all ACPI devices. | |
124 | * This means running _INI on all present devices. | |
125 | * | |
126 | * Note: We install PCI config space handler on region access, | |
127 | * not here. | |
128 | * | |
129 | ******************************************************************************/ | |
130 | ||
4be44fcd | 131 | acpi_status acpi_ns_initialize_devices(void) |
1da177e4 | 132 | { |
4be44fcd LB |
133 | acpi_status status; |
134 | struct acpi_device_walk_info info; | |
1da177e4 | 135 | |
4be44fcd | 136 | ACPI_FUNCTION_TRACE("ns_initialize_devices"); |
1da177e4 LT |
137 | |
138 | /* Init counters */ | |
139 | ||
140 | info.device_count = 0; | |
141 | info.num_STA = 0; | |
142 | info.num_INI = 0; | |
143 | ||
4be44fcd LB |
144 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, |
145 | "Executing all Device _STA and_INI methods:")); | |
1da177e4 | 146 | |
4be44fcd LB |
147 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
148 | if (ACPI_FAILURE(status)) { | |
149 | return_ACPI_STATUS(status); | |
1da177e4 LT |
150 | } |
151 | ||
152 | /* Walk namespace for all objects */ | |
153 | ||
4be44fcd LB |
154 | status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, |
155 | ACPI_UINT32_MAX, TRUE, | |
156 | acpi_ns_init_one_device, &info, NULL); | |
1da177e4 | 157 | |
4be44fcd | 158 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
1da177e4 | 159 | |
4be44fcd | 160 | if (ACPI_FAILURE(status)) { |
b8e4d893 | 161 | ACPI_EXCEPTION((AE_INFO, status, "During walk_namespace")); |
1da177e4 LT |
162 | } |
163 | ||
4be44fcd | 164 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, |
b8e4d893 | 165 | "\n%hd Devices found - executed %hd _STA, %hd _INI methods\n", |
4be44fcd | 166 | info.device_count, info.num_STA, info.num_INI)); |
1da177e4 | 167 | |
4be44fcd | 168 | return_ACPI_STATUS(status); |
1da177e4 LT |
169 | } |
170 | ||
1da177e4 LT |
171 | /******************************************************************************* |
172 | * | |
173 | * FUNCTION: acpi_ns_init_one_object | |
174 | * | |
175 | * PARAMETERS: obj_handle - Node | |
176 | * Level - Current nesting level | |
177 | * Context - Points to a init info struct | |
178 | * return_value - Not used | |
179 | * | |
180 | * RETURN: Status | |
181 | * | |
182 | * DESCRIPTION: Callback from acpi_walk_namespace. Invoked for every object | |
183 | * within the namespace. | |
184 | * | |
185 | * Currently, the only objects that require initialization are: | |
186 | * 1) Methods | |
187 | * 2) Op Regions | |
188 | * | |
189 | ******************************************************************************/ | |
190 | ||
44f6c012 | 191 | static acpi_status |
4be44fcd LB |
192 | acpi_ns_init_one_object(acpi_handle obj_handle, |
193 | u32 level, void *context, void **return_value) | |
1da177e4 | 194 | { |
4be44fcd LB |
195 | acpi_object_type type; |
196 | acpi_status status; | |
197 | struct acpi_init_walk_info *info = | |
198 | (struct acpi_init_walk_info *)context; | |
199 | struct acpi_namespace_node *node = | |
200 | (struct acpi_namespace_node *)obj_handle; | |
201 | union acpi_operand_object *obj_desc; | |
1da177e4 | 202 | |
4be44fcd | 203 | ACPI_FUNCTION_NAME("ns_init_one_object"); |
1da177e4 LT |
204 | |
205 | info->object_count++; | |
206 | ||
207 | /* And even then, we are only interested in a few object types */ | |
208 | ||
4be44fcd LB |
209 | type = acpi_ns_get_type(obj_handle); |
210 | obj_desc = acpi_ns_get_attached_object(node); | |
1da177e4 LT |
211 | if (!obj_desc) { |
212 | return (AE_OK); | |
213 | } | |
214 | ||
215 | /* Increment counters for object types we are looking for */ | |
216 | ||
217 | switch (type) { | |
218 | case ACPI_TYPE_REGION: | |
219 | info->op_region_count++; | |
220 | break; | |
221 | ||
222 | case ACPI_TYPE_BUFFER_FIELD: | |
223 | info->field_count++; | |
224 | break; | |
225 | ||
226 | case ACPI_TYPE_BUFFER: | |
227 | info->buffer_count++; | |
228 | break; | |
229 | ||
230 | case ACPI_TYPE_PACKAGE: | |
231 | info->package_count++; | |
232 | break; | |
233 | ||
234 | default: | |
235 | ||
236 | /* No init required, just exit now */ | |
237 | return (AE_OK); | |
238 | } | |
239 | ||
240 | /* | |
241 | * If the object is already initialized, nothing else to do | |
242 | */ | |
243 | if (obj_desc->common.flags & AOPOBJ_DATA_VALID) { | |
244 | return (AE_OK); | |
245 | } | |
246 | ||
247 | /* | |
248 | * Must lock the interpreter before executing AML code | |
249 | */ | |
4be44fcd LB |
250 | status = acpi_ex_enter_interpreter(); |
251 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
252 | return (status); |
253 | } | |
254 | ||
255 | /* | |
256 | * Each of these types can contain executable AML code within the | |
257 | * declaration. | |
258 | */ | |
259 | switch (type) { | |
260 | case ACPI_TYPE_REGION: | |
261 | ||
262 | info->op_region_init++; | |
4be44fcd | 263 | status = acpi_ds_get_region_arguments(obj_desc); |
1da177e4 LT |
264 | break; |
265 | ||
266 | case ACPI_TYPE_BUFFER_FIELD: | |
267 | ||
268 | info->field_init++; | |
4be44fcd | 269 | status = acpi_ds_get_buffer_field_arguments(obj_desc); |
1da177e4 LT |
270 | break; |
271 | ||
272 | case ACPI_TYPE_BUFFER: | |
273 | ||
274 | info->buffer_init++; | |
4be44fcd | 275 | status = acpi_ds_get_buffer_arguments(obj_desc); |
1da177e4 LT |
276 | break; |
277 | ||
278 | case ACPI_TYPE_PACKAGE: | |
279 | ||
280 | info->package_init++; | |
4be44fcd | 281 | status = acpi_ds_get_package_arguments(obj_desc); |
1da177e4 LT |
282 | break; |
283 | ||
284 | default: | |
285 | /* No other types can get here */ | |
286 | break; | |
287 | } | |
288 | ||
4be44fcd | 289 | if (ACPI_FAILURE(status)) { |
b8e4d893 BM |
290 | ACPI_EXCEPTION((AE_INFO, status, |
291 | "Could not execute arguments for [%4.4s] (%s)", | |
292 | acpi_ut_get_node_name(node), | |
293 | acpi_ut_get_type_name(type))); | |
1da177e4 LT |
294 | } |
295 | ||
296 | /* | |
297 | * Print a dot for each object unless we are going to print the entire | |
298 | * pathname | |
299 | */ | |
300 | if (!(acpi_dbg_level & ACPI_LV_INIT_NAMES)) { | |
4be44fcd | 301 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, ".")); |
1da177e4 LT |
302 | } |
303 | ||
304 | /* | |
305 | * We ignore errors from above, and always return OK, since we don't want | |
306 | * to abort the walk on any single error. | |
307 | */ | |
4be44fcd | 308 | acpi_ex_exit_interpreter(); |
1da177e4 LT |
309 | return (AE_OK); |
310 | } | |
311 | ||
1da177e4 LT |
312 | /******************************************************************************* |
313 | * | |
314 | * FUNCTION: acpi_ns_init_one_device | |
315 | * | |
316 | * PARAMETERS: acpi_walk_callback | |
317 | * | |
318 | * RETURN: acpi_status | |
319 | * | |
320 | * DESCRIPTION: This is called once per device soon after ACPI is enabled | |
321 | * to initialize each device. It determines if the device is | |
322 | * present, and if so, calls _INI. | |
323 | * | |
324 | ******************************************************************************/ | |
325 | ||
44f6c012 | 326 | static acpi_status |
4be44fcd LB |
327 | acpi_ns_init_one_device(acpi_handle obj_handle, |
328 | u32 nesting_level, void *context, void **return_value) | |
1da177e4 | 329 | { |
4be44fcd LB |
330 | struct acpi_device_walk_info *info = |
331 | (struct acpi_device_walk_info *)context; | |
332 | struct acpi_parameter_info pinfo; | |
333 | u32 flags; | |
334 | acpi_status status; | |
defba1d8 BM |
335 | struct acpi_namespace_node *ini_node; |
336 | struct acpi_namespace_node *device_node; | |
1da177e4 | 337 | |
4be44fcd | 338 | ACPI_FUNCTION_TRACE("ns_init_one_device"); |
1da177e4 | 339 | |
defba1d8 BM |
340 | device_node = acpi_ns_map_handle_to_node(obj_handle); |
341 | if (!device_node) { | |
4be44fcd | 342 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
343 | } |
344 | ||
345 | /* | |
346 | * We will run _STA/_INI on Devices, Processors and thermal_zones only | |
347 | */ | |
defba1d8 BM |
348 | if ((device_node->type != ACPI_TYPE_DEVICE) && |
349 | (device_node->type != ACPI_TYPE_PROCESSOR) && | |
350 | (device_node->type != ACPI_TYPE_THERMAL)) { | |
4be44fcd | 351 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
352 | } |
353 | ||
354 | if ((acpi_dbg_level <= ACPI_LV_ALL_EXCEPTIONS) && | |
4be44fcd LB |
355 | (!(acpi_dbg_level & ACPI_LV_INFO))) { |
356 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, ".")); | |
1da177e4 LT |
357 | } |
358 | ||
359 | info->device_count++; | |
360 | ||
361 | /* | |
defba1d8 BM |
362 | * Check if the _INI method exists for this device - |
363 | * if _INI does not exist, there is no need to run _STA | |
364 | * No _INI means device requires no initialization | |
365 | */ | |
366 | status = acpi_ns_search_node(*ACPI_CAST_PTR(u32, METHOD_NAME__INI), | |
367 | device_node, ACPI_TYPE_METHOD, &ini_node); | |
368 | if (ACPI_FAILURE(status)) { | |
52fc0b02 | 369 | |
defba1d8 BM |
370 | /* No _INI method found - move on to next device */ |
371 | ||
372 | return_ACPI_STATUS(AE_OK); | |
373 | } | |
374 | ||
375 | /* | |
376 | * Run _STA to determine if we can run _INI on the device - | |
377 | * the device must be present before _INI can be run. | |
378 | * However, _STA is not required - assume device present if no _STA | |
1da177e4 | 379 | */ |
4be44fcd | 380 | ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname(ACPI_TYPE_METHOD, |
defba1d8 | 381 | device_node, |
4be44fcd | 382 | METHOD_NAME__STA)); |
1da177e4 | 383 | |
defba1d8 BM |
384 | pinfo.node = device_node; |
385 | pinfo.parameters = NULL; | |
386 | pinfo.parameter_type = ACPI_PARAM_ARGS; | |
387 | ||
388 | status = acpi_ut_execute_STA(pinfo.node, &flags); | |
4be44fcd | 389 | if (ACPI_FAILURE(status)) { |
52fc0b02 | 390 | |
defba1d8 | 391 | /* Ignore error and move on to next device */ |
1da177e4 | 392 | |
defba1d8 BM |
393 | return_ACPI_STATUS(AE_OK); |
394 | } | |
1da177e4 | 395 | |
defba1d8 | 396 | if (flags != ACPI_UINT32_MAX) { |
1da177e4 | 397 | info->num_STA++; |
defba1d8 | 398 | } |
1da177e4 | 399 | |
defba1d8 | 400 | if (!(flags & ACPI_STA_DEVICE_PRESENT)) { |
52fc0b02 | 401 | |
defba1d8 | 402 | /* Don't look at children of a not present device */ |
1da177e4 | 403 | |
defba1d8 | 404 | return_ACPI_STATUS(AE_CTRL_DEPTH); |
1da177e4 LT |
405 | } |
406 | ||
407 | /* | |
defba1d8 BM |
408 | * The device is present and _INI exists. Run the _INI method. |
409 | * (We already have the _INI node from above) | |
1da177e4 | 410 | */ |
4be44fcd LB |
411 | ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname(ACPI_TYPE_METHOD, |
412 | pinfo.node, | |
413 | METHOD_NAME__INI)); | |
1da177e4 | 414 | |
defba1d8 BM |
415 | pinfo.node = ini_node; |
416 | status = acpi_ns_evaluate_by_handle(&pinfo); | |
417 | if (ACPI_FAILURE(status)) { | |
52fc0b02 | 418 | |
defba1d8 | 419 | /* Ignore error and move on to next device */ |
1da177e4 LT |
420 | |
421 | #ifdef ACPI_DEBUG_OUTPUT | |
defba1d8 | 422 | char *scope_name = acpi_ns_get_external_pathname(ini_node); |
1da177e4 | 423 | |
b8e4d893 BM |
424 | ACPI_WARNING((AE_INFO, "%s._INI failed: %s", |
425 | scope_name, acpi_format_exception(status))); | |
1da177e4 | 426 | |
defba1d8 | 427 | ACPI_MEM_FREE(scope_name); |
1da177e4 | 428 | #endif |
4be44fcd | 429 | } else { |
1da177e4 LT |
430 | /* Delete any return object (especially if implicit_return is enabled) */ |
431 | ||
432 | if (pinfo.return_object) { | |
4be44fcd | 433 | acpi_ut_remove_reference(pinfo.return_object); |
1da177e4 LT |
434 | } |
435 | ||
436 | /* Count of successful INIs */ | |
437 | ||
438 | info->num_INI++; | |
439 | } | |
440 | ||
441 | if (acpi_gbl_init_handler) { | |
52fc0b02 | 442 | |
1da177e4 LT |
443 | /* External initialization handler is present, call it */ |
444 | ||
4be44fcd LB |
445 | status = |
446 | acpi_gbl_init_handler(pinfo.node, ACPI_INIT_DEVICE_INI); | |
1da177e4 LT |
447 | } |
448 | ||
defba1d8 | 449 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 450 | } |