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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: nsinit - namespace initialization | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
75a44ce0 | 8 | * Copyright (C) 2000 - 2008, Intel Corp. |
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> | |
5d0e600d | 48 | #include <linux/nmi.h> |
1da177e4 LT |
49 | |
50 | #define _COMPONENT ACPI_NAMESPACE | |
4be44fcd | 51 | ACPI_MODULE_NAME("nsinit") |
1da177e4 | 52 | |
44f6c012 | 53 | /* Local prototypes */ |
44f6c012 | 54 | static acpi_status |
4be44fcd LB |
55 | acpi_ns_init_one_object(acpi_handle obj_handle, |
56 | u32 level, void *context, void **return_value); | |
44f6c012 RM |
57 | |
58 | static acpi_status | |
4be44fcd LB |
59 | acpi_ns_init_one_device(acpi_handle obj_handle, |
60 | u32 nesting_level, void *context, void **return_value); | |
1da177e4 | 61 | |
b229cf92 BM |
62 | static acpi_status |
63 | acpi_ns_find_ini_methods(acpi_handle obj_handle, | |
64 | u32 nesting_level, void *context, void **return_value); | |
65 | ||
1da177e4 LT |
66 | /******************************************************************************* |
67 | * | |
68 | * FUNCTION: acpi_ns_initialize_objects | |
69 | * | |
70 | * PARAMETERS: None | |
71 | * | |
72 | * RETURN: Status | |
73 | * | |
74 | * DESCRIPTION: Walk the entire namespace and perform any necessary | |
75 | * initialization on the objects found therein | |
76 | * | |
77 | ******************************************************************************/ | |
78 | ||
4be44fcd | 79 | acpi_status acpi_ns_initialize_objects(void) |
1da177e4 | 80 | { |
4be44fcd LB |
81 | acpi_status status; |
82 | struct acpi_init_walk_info info; | |
1da177e4 | 83 | |
b229cf92 | 84 | ACPI_FUNCTION_TRACE(ns_initialize_objects); |
1da177e4 | 85 | |
4be44fcd LB |
86 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, |
87 | "**** Starting initialization of namespace objects ****\n")); | |
88 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, | |
89 | "Completing Region/Field/Buffer/Package initialization:")); | |
1da177e4 LT |
90 | |
91 | /* Set all init info to zero */ | |
92 | ||
4be44fcd | 93 | ACPI_MEMSET(&info, 0, sizeof(struct acpi_init_walk_info)); |
1da177e4 LT |
94 | |
95 | /* Walk entire namespace from the supplied root */ | |
96 | ||
4be44fcd LB |
97 | status = acpi_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, |
98 | ACPI_UINT32_MAX, acpi_ns_init_one_object, | |
99 | &info, NULL); | |
100 | if (ACPI_FAILURE(status)) { | |
b229cf92 | 101 | ACPI_EXCEPTION((AE_INFO, status, "During WalkNamespace")); |
1da177e4 LT |
102 | } |
103 | ||
4be44fcd LB |
104 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, |
105 | "\nInitialized %hd/%hd Regions %hd/%hd Fields %hd/%hd Buffers %hd/%hd Packages (%hd nodes)\n", | |
106 | info.op_region_init, info.op_region_count, | |
107 | info.field_init, info.field_count, | |
108 | info.buffer_init, info.buffer_count, | |
109 | info.package_init, info.package_count, | |
110 | info.object_count)); | |
1da177e4 | 111 | |
4be44fcd LB |
112 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, |
113 | "%hd Control Methods found\n", info.method_count)); | |
114 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, | |
115 | "%hd Op Regions found\n", info.op_region_count)); | |
1da177e4 | 116 | |
4be44fcd | 117 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
118 | } |
119 | ||
1da177e4 LT |
120 | /******************************************************************************* |
121 | * | |
122 | * FUNCTION: acpi_ns_initialize_devices | |
123 | * | |
124 | * PARAMETERS: None | |
125 | * | |
126 | * RETURN: acpi_status | |
127 | * | |
128 | * DESCRIPTION: Walk the entire namespace and initialize all ACPI devices. | |
129 | * This means running _INI on all present devices. | |
130 | * | |
131 | * Note: We install PCI config space handler on region access, | |
132 | * not here. | |
133 | * | |
134 | ******************************************************************************/ | |
135 | ||
4be44fcd | 136 | acpi_status acpi_ns_initialize_devices(void) |
1da177e4 | 137 | { |
4be44fcd LB |
138 | acpi_status status; |
139 | struct acpi_device_walk_info info; | |
1da177e4 | 140 | |
b229cf92 | 141 | ACPI_FUNCTION_TRACE(ns_initialize_devices); |
1da177e4 LT |
142 | |
143 | /* Init counters */ | |
144 | ||
145 | info.device_count = 0; | |
146 | info.num_STA = 0; | |
147 | info.num_INI = 0; | |
148 | ||
4be44fcd | 149 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, |
b229cf92 BM |
150 | "Initializing Device/Processor/Thermal objects by executing _INI methods:")); |
151 | ||
152 | /* Tree analysis: find all subtrees that contain _INI methods */ | |
1da177e4 | 153 | |
b229cf92 BM |
154 | status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, |
155 | ACPI_UINT32_MAX, FALSE, | |
156 | acpi_ns_find_ini_methods, &info, NULL); | |
4be44fcd | 157 | if (ACPI_FAILURE(status)) { |
4119532c BM |
158 | goto error_exit; |
159 | } | |
160 | ||
161 | /* Allocate the evaluation information block */ | |
162 | ||
163 | info.evaluate_info = | |
164 | ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info)); | |
165 | if (!info.evaluate_info) { | |
166 | status = AE_NO_MEMORY; | |
167 | goto error_exit; | |
1da177e4 LT |
168 | } |
169 | ||
b229cf92 | 170 | /* Walk namespace to execute all _INIs on present devices */ |
1da177e4 | 171 | |
4be44fcd | 172 | status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, |
b229cf92 | 173 | ACPI_UINT32_MAX, FALSE, |
4be44fcd | 174 | acpi_ns_init_one_device, &info, NULL); |
4119532c BM |
175 | |
176 | ACPI_FREE(info.evaluate_info); | |
4be44fcd | 177 | if (ACPI_FAILURE(status)) { |
4119532c | 178 | goto error_exit; |
1da177e4 LT |
179 | } |
180 | ||
4be44fcd | 181 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, |
b229cf92 BM |
182 | "\nExecuted %hd _INI methods requiring %hd _STA executions (examined %hd objects)\n", |
183 | info.num_INI, info.num_STA, info.device_count)); | |
1da177e4 | 184 | |
4be44fcd | 185 | return_ACPI_STATUS(status); |
4119532c BM |
186 | |
187 | error_exit: | |
188 | ACPI_EXCEPTION((AE_INFO, status, "During device initialization")); | |
189 | return_ACPI_STATUS(status); | |
1da177e4 LT |
190 | } |
191 | ||
1da177e4 LT |
192 | /******************************************************************************* |
193 | * | |
194 | * FUNCTION: acpi_ns_init_one_object | |
195 | * | |
196 | * PARAMETERS: obj_handle - Node | |
197 | * Level - Current nesting level | |
198 | * Context - Points to a init info struct | |
199 | * return_value - Not used | |
200 | * | |
201 | * RETURN: Status | |
202 | * | |
203 | * DESCRIPTION: Callback from acpi_walk_namespace. Invoked for every object | |
204 | * within the namespace. | |
205 | * | |
206 | * Currently, the only objects that require initialization are: | |
207 | * 1) Methods | |
208 | * 2) Op Regions | |
209 | * | |
210 | ******************************************************************************/ | |
211 | ||
44f6c012 | 212 | static acpi_status |
4be44fcd LB |
213 | acpi_ns_init_one_object(acpi_handle obj_handle, |
214 | u32 level, void *context, void **return_value) | |
1da177e4 | 215 | { |
4be44fcd | 216 | acpi_object_type type; |
4d2acd9e | 217 | acpi_status status = AE_OK; |
4be44fcd LB |
218 | struct acpi_init_walk_info *info = |
219 | (struct acpi_init_walk_info *)context; | |
220 | struct acpi_namespace_node *node = | |
221 | (struct acpi_namespace_node *)obj_handle; | |
222 | union acpi_operand_object *obj_desc; | |
1da177e4 | 223 | |
b229cf92 | 224 | ACPI_FUNCTION_NAME(ns_init_one_object); |
1da177e4 LT |
225 | |
226 | info->object_count++; | |
227 | ||
228 | /* And even then, we are only interested in a few object types */ | |
229 | ||
4be44fcd LB |
230 | type = acpi_ns_get_type(obj_handle); |
231 | obj_desc = acpi_ns_get_attached_object(node); | |
1da177e4 LT |
232 | if (!obj_desc) { |
233 | return (AE_OK); | |
234 | } | |
235 | ||
236 | /* Increment counters for object types we are looking for */ | |
237 | ||
238 | switch (type) { | |
239 | case ACPI_TYPE_REGION: | |
240 | info->op_region_count++; | |
241 | break; | |
242 | ||
243 | case ACPI_TYPE_BUFFER_FIELD: | |
244 | info->field_count++; | |
245 | break; | |
246 | ||
ef805d95 LM |
247 | case ACPI_TYPE_LOCAL_BANK_FIELD: |
248 | info->field_count++; | |
249 | break; | |
250 | ||
1da177e4 LT |
251 | case ACPI_TYPE_BUFFER: |
252 | info->buffer_count++; | |
253 | break; | |
254 | ||
255 | case ACPI_TYPE_PACKAGE: | |
256 | info->package_count++; | |
257 | break; | |
258 | ||
259 | default: | |
260 | ||
261 | /* No init required, just exit now */ | |
262 | return (AE_OK); | |
263 | } | |
264 | ||
265 | /* | |
266 | * If the object is already initialized, nothing else to do | |
267 | */ | |
268 | if (obj_desc->common.flags & AOPOBJ_DATA_VALID) { | |
269 | return (AE_OK); | |
270 | } | |
271 | ||
272 | /* | |
273 | * Must lock the interpreter before executing AML code | |
274 | */ | |
4d2acd9e | 275 | acpi_ex_enter_interpreter(); |
1da177e4 LT |
276 | |
277 | /* | |
278 | * Each of these types can contain executable AML code within the | |
279 | * declaration. | |
280 | */ | |
281 | switch (type) { | |
282 | case ACPI_TYPE_REGION: | |
283 | ||
284 | info->op_region_init++; | |
4be44fcd | 285 | status = acpi_ds_get_region_arguments(obj_desc); |
1da177e4 LT |
286 | break; |
287 | ||
288 | case ACPI_TYPE_BUFFER_FIELD: | |
289 | ||
290 | info->field_init++; | |
4be44fcd | 291 | status = acpi_ds_get_buffer_field_arguments(obj_desc); |
1da177e4 LT |
292 | break; |
293 | ||
ef805d95 LM |
294 | case ACPI_TYPE_LOCAL_BANK_FIELD: |
295 | ||
296 | info->field_init++; | |
297 | status = acpi_ds_get_bank_field_arguments(obj_desc); | |
298 | break; | |
299 | ||
1da177e4 LT |
300 | case ACPI_TYPE_BUFFER: |
301 | ||
302 | info->buffer_init++; | |
4be44fcd | 303 | status = acpi_ds_get_buffer_arguments(obj_desc); |
1da177e4 LT |
304 | break; |
305 | ||
306 | case ACPI_TYPE_PACKAGE: | |
307 | ||
308 | info->package_init++; | |
4be44fcd | 309 | status = acpi_ds_get_package_arguments(obj_desc); |
1da177e4 LT |
310 | break; |
311 | ||
312 | default: | |
313 | /* No other types can get here */ | |
314 | break; | |
315 | } | |
316 | ||
4be44fcd | 317 | if (ACPI_FAILURE(status)) { |
b8e4d893 BM |
318 | ACPI_EXCEPTION((AE_INFO, status, |
319 | "Could not execute arguments for [%4.4s] (%s)", | |
320 | acpi_ut_get_node_name(node), | |
321 | acpi_ut_get_type_name(type))); | |
1da177e4 LT |
322 | } |
323 | ||
324 | /* | |
325 | * Print a dot for each object unless we are going to print the entire | |
326 | * pathname | |
327 | */ | |
328 | if (!(acpi_dbg_level & ACPI_LV_INIT_NAMES)) { | |
4be44fcd | 329 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, ".")); |
1da177e4 LT |
330 | } |
331 | ||
332 | /* | |
333 | * We ignore errors from above, and always return OK, since we don't want | |
334 | * to abort the walk on any single error. | |
335 | */ | |
4be44fcd | 336 | acpi_ex_exit_interpreter(); |
1da177e4 LT |
337 | return (AE_OK); |
338 | } | |
339 | ||
b229cf92 BM |
340 | /******************************************************************************* |
341 | * | |
342 | * FUNCTION: acpi_ns_find_ini_methods | |
343 | * | |
344 | * PARAMETERS: acpi_walk_callback | |
345 | * | |
346 | * RETURN: acpi_status | |
347 | * | |
348 | * DESCRIPTION: Called during namespace walk. Finds objects named _INI under | |
349 | * device/processor/thermal objects, and marks the entire subtree | |
350 | * with a SUBTREE_HAS_INI flag. This flag is used during the | |
351 | * subsequent device initialization walk to avoid entire subtrees | |
352 | * that do not contain an _INI. | |
353 | * | |
354 | ******************************************************************************/ | |
355 | ||
356 | static acpi_status | |
357 | acpi_ns_find_ini_methods(acpi_handle obj_handle, | |
358 | u32 nesting_level, void *context, void **return_value) | |
359 | { | |
360 | struct acpi_device_walk_info *info = | |
361 | ACPI_CAST_PTR(struct acpi_device_walk_info, context); | |
362 | struct acpi_namespace_node *node; | |
363 | struct acpi_namespace_node *parent_node; | |
364 | ||
365 | /* Keep count of device/processor/thermal objects */ | |
366 | ||
367 | node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_handle); | |
368 | if ((node->type == ACPI_TYPE_DEVICE) || | |
369 | (node->type == ACPI_TYPE_PROCESSOR) || | |
370 | (node->type == ACPI_TYPE_THERMAL)) { | |
371 | info->device_count++; | |
372 | return (AE_OK); | |
373 | } | |
374 | ||
375 | /* We are only looking for methods named _INI */ | |
376 | ||
377 | if (!ACPI_COMPARE_NAME(node->name.ascii, METHOD_NAME__INI)) { | |
378 | return (AE_OK); | |
379 | } | |
380 | ||
381 | /* | |
382 | * The only _INI methods that we care about are those that are | |
383 | * present under Device, Processor, and Thermal objects. | |
384 | */ | |
385 | parent_node = acpi_ns_get_parent_node(node); | |
386 | switch (parent_node->type) { | |
387 | case ACPI_TYPE_DEVICE: | |
388 | case ACPI_TYPE_PROCESSOR: | |
389 | case ACPI_TYPE_THERMAL: | |
390 | ||
391 | /* Mark parent and bubble up the INI present flag to the root */ | |
392 | ||
393 | while (parent_node) { | |
394 | parent_node->flags |= ANOBJ_SUBTREE_HAS_INI; | |
395 | parent_node = acpi_ns_get_parent_node(parent_node); | |
396 | } | |
397 | break; | |
398 | ||
399 | default: | |
400 | break; | |
401 | } | |
402 | ||
403 | return (AE_OK); | |
404 | } | |
405 | ||
1da177e4 LT |
406 | /******************************************************************************* |
407 | * | |
408 | * FUNCTION: acpi_ns_init_one_device | |
409 | * | |
410 | * PARAMETERS: acpi_walk_callback | |
411 | * | |
412 | * RETURN: acpi_status | |
413 | * | |
414 | * DESCRIPTION: This is called once per device soon after ACPI is enabled | |
415 | * to initialize each device. It determines if the device is | |
416 | * present, and if so, calls _INI. | |
417 | * | |
418 | ******************************************************************************/ | |
419 | ||
44f6c012 | 420 | static acpi_status |
4be44fcd LB |
421 | acpi_ns_init_one_device(acpi_handle obj_handle, |
422 | u32 nesting_level, void *context, void **return_value) | |
1da177e4 | 423 | { |
4119532c | 424 | struct acpi_device_walk_info *walk_info = |
b229cf92 | 425 | ACPI_CAST_PTR(struct acpi_device_walk_info, context); |
4119532c | 426 | struct acpi_evaluate_info *info = walk_info->evaluate_info; |
4be44fcd LB |
427 | u32 flags; |
428 | acpi_status status; | |
defba1d8 | 429 | struct acpi_namespace_node *device_node; |
1da177e4 | 430 | |
b229cf92 | 431 | ACPI_FUNCTION_TRACE(ns_init_one_device); |
1da177e4 | 432 | |
b229cf92 | 433 | /* We are interested in Devices, Processors and thermal_zones only */ |
1da177e4 | 434 | |
b229cf92 | 435 | device_node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_handle); |
defba1d8 BM |
436 | if ((device_node->type != ACPI_TYPE_DEVICE) && |
437 | (device_node->type != ACPI_TYPE_PROCESSOR) && | |
438 | (device_node->type != ACPI_TYPE_THERMAL)) { | |
4be44fcd | 439 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
440 | } |
441 | ||
1da177e4 | 442 | /* |
b229cf92 BM |
443 | * Because of an earlier namespace analysis, all subtrees that contain an |
444 | * _INI method are tagged. | |
445 | * | |
446 | * If this device subtree does not contain any _INI methods, we | |
447 | * can exit now and stop traversing this entire subtree. | |
defba1d8 | 448 | */ |
b229cf92 BM |
449 | if (!(device_node->flags & ANOBJ_SUBTREE_HAS_INI)) { |
450 | return_ACPI_STATUS(AE_CTRL_DEPTH); | |
defba1d8 BM |
451 | } |
452 | ||
453 | /* | |
b229cf92 BM |
454 | * Run _STA to determine if this device is present and functioning. We |
455 | * must know this information for two important reasons (from ACPI spec): | |
456 | * | |
457 | * 1) We can only run _INI if the device is present. | |
458 | * 2) We must abort the device tree walk on this subtree if the device is | |
459 | * not present and is not functional (we will not examine the children) | |
460 | * | |
461 | * The _STA method is not required to be present under the device, we | |
462 | * assume the device is present if _STA does not exist. | |
1da177e4 | 463 | */ |
b229cf92 BM |
464 | ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname |
465 | (ACPI_TYPE_METHOD, device_node, METHOD_NAME__STA)); | |
1da177e4 | 466 | |
b229cf92 | 467 | status = acpi_ut_execute_STA(device_node, &flags); |
4be44fcd | 468 | if (ACPI_FAILURE(status)) { |
52fc0b02 | 469 | |
defba1d8 | 470 | /* Ignore error and move on to next device */ |
1da177e4 | 471 | |
defba1d8 BM |
472 | return_ACPI_STATUS(AE_OK); |
473 | } | |
1da177e4 | 474 | |
b229cf92 BM |
475 | /* |
476 | * Flags == -1 means that _STA was not found. In this case, we assume that | |
477 | * the device is both present and functional. | |
478 | * | |
479 | * From the ACPI spec, description of _STA: | |
480 | * | |
481 | * "If a device object (including the processor object) does not have an | |
482 | * _STA object, then OSPM assumes that all of the above bits are set (in | |
483 | * other words, the device is present, ..., and functioning)" | |
484 | */ | |
defba1d8 | 485 | if (flags != ACPI_UINT32_MAX) { |
4119532c | 486 | walk_info->num_STA++; |
defba1d8 | 487 | } |
1da177e4 | 488 | |
b229cf92 BM |
489 | /* |
490 | * Examine the PRESENT and FUNCTIONING status bits | |
491 | * | |
492 | * Note: ACPI spec does not seem to specify behavior for the present but | |
493 | * not functioning case, so we assume functioning if present. | |
494 | */ | |
defba1d8 | 495 | if (!(flags & ACPI_STA_DEVICE_PRESENT)) { |
52fc0b02 | 496 | |
b229cf92 BM |
497 | /* Device is not present, we must examine the Functioning bit */ |
498 | ||
499 | if (flags & ACPI_STA_DEVICE_FUNCTIONING) { | |
500 | /* | |
501 | * Device is not present but is "functioning". In this case, | |
502 | * we will not run _INI, but we continue to examine the children | |
503 | * of this device. | |
504 | * | |
505 | * From the ACPI spec, description of _STA: (Note - no mention | |
506 | * of whether to run _INI or not on the device in question) | |
507 | * | |
508 | * "_STA may return bit 0 clear (not present) with bit 3 set | |
509 | * (device is functional). This case is used to indicate a valid | |
510 | * device for which no device driver should be loaded (for example, | |
511 | * a bridge device.) Children of this device may be present and | |
512 | * valid. OSPM should continue enumeration below a device whose | |
513 | * _STA returns this bit combination" | |
514 | */ | |
515 | return_ACPI_STATUS(AE_OK); | |
516 | } else { | |
517 | /* | |
518 | * Device is not present and is not functioning. We must abort the | |
519 | * walk of this subtree immediately -- don't look at the children | |
520 | * of such a device. | |
521 | * | |
522 | * From the ACPI spec, description of _INI: | |
523 | * | |
524 | * "If the _STA method indicates that the device is not present, | |
525 | * OSPM will not run the _INI and will not examine the children | |
526 | * of the device for _INI methods" | |
527 | */ | |
528 | return_ACPI_STATUS(AE_CTRL_DEPTH); | |
529 | } | |
1da177e4 LT |
530 | } |
531 | ||
532 | /* | |
b229cf92 BM |
533 | * The device is present or is assumed present if no _STA exists. |
534 | * Run the _INI if it exists (not required to exist) | |
535 | * | |
536 | * Note: We know there is an _INI within this subtree, but it may not be | |
537 | * under this particular device, it may be lower in the branch. | |
1da177e4 | 538 | */ |
b229cf92 BM |
539 | ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname |
540 | (ACPI_TYPE_METHOD, device_node, METHOD_NAME__INI)); | |
1da177e4 | 541 | |
4119532c BM |
542 | info->prefix_node = device_node; |
543 | info->pathname = METHOD_NAME__INI; | |
544 | info->parameters = NULL; | |
545 | info->parameter_type = ACPI_PARAM_ARGS; | |
546 | info->flags = ACPI_IGNORE_RETURN_VALUE; | |
1da177e4 | 547 | |
5d0e600d IM |
548 | /* |
549 | * Some hardware relies on this being executed as atomically | |
550 | * as possible (without an NMI being received in the middle of | |
551 | * this) - so disable NMIs and initialize the device: | |
552 | */ | |
553 | acpi_nmi_disable(); | |
4119532c | 554 | status = acpi_ns_evaluate(info); |
5d0e600d IM |
555 | acpi_nmi_enable(); |
556 | ||
b229cf92 | 557 | if (ACPI_SUCCESS(status)) { |
4119532c | 558 | walk_info->num_INI++; |
1da177e4 | 559 | |
b229cf92 BM |
560 | if ((acpi_dbg_level <= ACPI_LV_ALL_EXCEPTIONS) && |
561 | (!(acpi_dbg_level & ACPI_LV_INFO))) { | |
562 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, ".")); | |
563 | } | |
1da177e4 | 564 | } |
b229cf92 BM |
565 | #ifdef ACPI_DEBUG_OUTPUT |
566 | else if (status != AE_NOT_FOUND) { | |
1da177e4 | 567 | |
b229cf92 BM |
568 | /* Ignore error and move on to next device */ |
569 | ||
4119532c BM |
570 | char *scope_name = |
571 | acpi_ns_get_external_pathname(info->resolved_node); | |
52fc0b02 | 572 | |
b229cf92 BM |
573 | ACPI_EXCEPTION((AE_INFO, status, "during %s._INI execution", |
574 | scope_name)); | |
575 | ACPI_FREE(scope_name); | |
576 | } | |
577 | #endif | |
1da177e4 | 578 | |
4c90ece2 BM |
579 | /* Ignore errors from above */ |
580 | ||
581 | status = AE_OK; | |
582 | ||
4119532c BM |
583 | /* |
584 | * The _INI method has been run if present; call the Global Initialization | |
585 | * Handler for this device. | |
586 | */ | |
b229cf92 | 587 | if (acpi_gbl_init_handler) { |
4be44fcd | 588 | status = |
4119532c | 589 | acpi_gbl_init_handler(device_node, ACPI_INIT_DEVICE_INI); |
1da177e4 LT |
590 | } |
591 | ||
4119532c | 592 | return_ACPI_STATUS(status); |
1da177e4 | 593 | } |