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Commit | Line | Data |
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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: nsinit - namespace initialization | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
7735ca0e | 8 | * Copyright (C) 2000 - 2017, 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 | 44 | #include <acpi/acpi.h> |
e2f7a777 LB |
45 | #include "accommon.h" |
46 | #include "acnamesp.h" | |
47 | #include "acdispat.h" | |
48 | #include "acinterp.h" | |
ced04366 | 49 | #include "acevents.h" |
1da177e4 LT |
50 | |
51 | #define _COMPONENT ACPI_NAMESPACE | |
4be44fcd | 52 | ACPI_MODULE_NAME("nsinit") |
1da177e4 | 53 | |
44f6c012 | 54 | /* Local prototypes */ |
44f6c012 | 55 | static acpi_status |
4be44fcd LB |
56 | acpi_ns_init_one_object(acpi_handle obj_handle, |
57 | u32 level, void *context, void **return_value); | |
44f6c012 RM |
58 | |
59 | static acpi_status | |
4be44fcd LB |
60 | acpi_ns_init_one_device(acpi_handle obj_handle, |
61 | u32 nesting_level, void *context, void **return_value); | |
1da177e4 | 62 | |
b229cf92 BM |
63 | static acpi_status |
64 | acpi_ns_find_ini_methods(acpi_handle obj_handle, | |
65 | u32 nesting_level, void *context, void **return_value); | |
66 | ||
1da177e4 LT |
67 | /******************************************************************************* |
68 | * | |
69 | * FUNCTION: acpi_ns_initialize_objects | |
70 | * | |
71 | * PARAMETERS: None | |
72 | * | |
73 | * RETURN: Status | |
74 | * | |
75 | * DESCRIPTION: Walk the entire namespace and perform any necessary | |
76 | * initialization on the objects found therein | |
77 | * | |
78 | ******************************************************************************/ | |
79 | ||
4be44fcd | 80 | acpi_status acpi_ns_initialize_objects(void) |
1da177e4 | 81 | { |
4be44fcd LB |
82 | acpi_status status; |
83 | struct acpi_init_walk_info info; | |
1da177e4 | 84 | |
b229cf92 | 85 | ACPI_FUNCTION_TRACE(ns_initialize_objects); |
1da177e4 | 86 | |
5508df89 LZ |
87 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
88 | "[Init] Completing Initialization of ACPI Objects\n")); | |
4be44fcd LB |
89 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, |
90 | "**** Starting initialization of namespace objects ****\n")); | |
91 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, | |
2fae3e56 | 92 | "Completing Region/Field/Buffer/Package initialization:\n")); |
1da177e4 LT |
93 | |
94 | /* Set all init info to zero */ | |
95 | ||
4fa4616e | 96 | memset(&info, 0, sizeof(struct acpi_init_walk_info)); |
1da177e4 LT |
97 | |
98 | /* Walk entire namespace from the supplied root */ | |
99 | ||
4be44fcd | 100 | status = acpi_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, |
1f86e8c1 LZ |
101 | ACPI_UINT32_MAX, acpi_ns_init_one_object, |
102 | NULL, &info, NULL); | |
4be44fcd | 103 | if (ACPI_FAILURE(status)) { |
b229cf92 | 104 | ACPI_EXCEPTION((AE_INFO, status, "During WalkNamespace")); |
1da177e4 LT |
105 | } |
106 | ||
4be44fcd | 107 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, |
3e5621a7 | 108 | " Initialized %u/%u Regions %u/%u Fields %u/%u " |
96b7b7ad | 109 | "Buffers %u/%u Packages (%u nodes)\n", |
4be44fcd LB |
110 | info.op_region_init, info.op_region_count, |
111 | info.field_init, info.field_count, | |
112 | info.buffer_init, info.buffer_count, | |
113 | info.package_init, info.package_count, | |
114 | info.object_count)); | |
1da177e4 | 115 | |
4be44fcd | 116 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, |
22b5afce BM |
117 | "%u Control Methods found\n%u Op Regions found\n", |
118 | info.method_count, info.op_region_count)); | |
1da177e4 | 119 | |
4be44fcd | 120 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
121 | } |
122 | ||
1da177e4 LT |
123 | /******************************************************************************* |
124 | * | |
125 | * FUNCTION: acpi_ns_initialize_devices | |
126 | * | |
127 | * PARAMETERS: None | |
128 | * | |
129 | * RETURN: acpi_status | |
130 | * | |
131 | * DESCRIPTION: Walk the entire namespace and initialize all ACPI devices. | |
132 | * This means running _INI on all present devices. | |
133 | * | |
134 | * Note: We install PCI config space handler on region access, | |
135 | * not here. | |
136 | * | |
137 | ******************************************************************************/ | |
138 | ||
ced04366 | 139 | acpi_status acpi_ns_initialize_devices(u32 flags) |
1da177e4 | 140 | { |
ebc3c9bb | 141 | acpi_status status = AE_OK; |
4be44fcd | 142 | struct acpi_device_walk_info info; |
2d3349de | 143 | acpi_handle handle; |
1da177e4 | 144 | |
b229cf92 | 145 | ACPI_FUNCTION_TRACE(ns_initialize_devices); |
1da177e4 | 146 | |
ced04366 LZ |
147 | if (!(flags & ACPI_NO_DEVICE_INIT)) { |
148 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, | |
149 | "[Init] Initializing ACPI Devices\n")); | |
150 | ||
151 | /* Init counters */ | |
152 | ||
153 | info.device_count = 0; | |
154 | info.num_STA = 0; | |
155 | info.num_INI = 0; | |
156 | ||
157 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, | |
158 | "Initializing Device/Processor/Thermal objects " | |
159 | "and executing _INI/_STA methods:\n")); | |
160 | ||
161 | /* Tree analysis: find all subtrees that contain _INI methods */ | |
162 | ||
163 | status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, | |
164 | ACPI_UINT32_MAX, FALSE, | |
165 | acpi_ns_find_ini_methods, NULL, | |
166 | &info, NULL); | |
167 | if (ACPI_FAILURE(status)) { | |
168 | goto error_exit; | |
169 | } | |
170 | ||
171 | /* Allocate the evaluation information block */ | |
172 | ||
173 | info.evaluate_info = | |
174 | ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info)); | |
175 | if (!info.evaluate_info) { | |
176 | status = AE_NO_MEMORY; | |
177 | goto error_exit; | |
178 | } | |
179 | ||
180 | /* | |
181 | * Execute the "global" _INI method that may appear at the root. | |
182 | * This support is provided for Windows compatibility (Vista+) and | |
183 | * is not part of the ACPI specification. | |
184 | */ | |
185 | info.evaluate_info->prefix_node = acpi_gbl_root_node; | |
186 | info.evaluate_info->relative_pathname = METHOD_NAME__INI; | |
187 | info.evaluate_info->parameters = NULL; | |
188 | info.evaluate_info->flags = ACPI_IGNORE_RETURN_VALUE; | |
189 | ||
190 | status = acpi_ns_evaluate(info.evaluate_info); | |
191 | if (ACPI_SUCCESS(status)) { | |
192 | info.num_INI++; | |
193 | } | |
2d3349de LZ |
194 | |
195 | /* | |
196 | * Execute \_SB._INI. | |
197 | * There appears to be a strict order requirement for \_SB._INI, | |
198 | * which should be evaluated before any _REG evaluations. | |
199 | */ | |
200 | status = acpi_get_handle(NULL, "\\_SB", &handle); | |
201 | if (ACPI_SUCCESS(status)) { | |
202 | memset(info.evaluate_info, 0, | |
203 | sizeof(struct acpi_evaluate_info)); | |
204 | info.evaluate_info->prefix_node = handle; | |
205 | info.evaluate_info->relative_pathname = | |
206 | METHOD_NAME__INI; | |
207 | info.evaluate_info->parameters = NULL; | |
208 | info.evaluate_info->flags = ACPI_IGNORE_RETURN_VALUE; | |
209 | ||
210 | status = acpi_ns_evaluate(info.evaluate_info); | |
211 | if (ACPI_SUCCESS(status)) { | |
212 | info.num_INI++; | |
213 | } | |
214 | } | |
1da177e4 LT |
215 | } |
216 | ||
9e64155e | 217 | /* |
ced04366 LZ |
218 | * Run all _REG methods |
219 | * | |
220 | * Note: Any objects accessed by the _REG methods will be automatically | |
221 | * initialized, even if they contain executable AML (see the call to | |
222 | * acpi_ns_initialize_objects below). | |
2d3349de LZ |
223 | * |
224 | * Note: According to the ACPI specification, we actually needn't execute | |
225 | * _REG for system_memory/system_io operation regions, but for PCI_Config | |
226 | * operation regions, it is required to evaluate _REG for those on a PCI | |
227 | * root bus that doesn't contain _BBN object. So this code is kept here | |
228 | * in order not to break things. | |
9e64155e | 229 | */ |
ced04366 LZ |
230 | if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) { |
231 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, | |
232 | "[Init] Executing _REG OpRegion methods\n")); | |
233 | ||
234 | status = acpi_ev_initialize_op_regions(); | |
235 | if (ACPI_FAILURE(status)) { | |
236 | goto error_exit; | |
237 | } | |
9e64155e BM |
238 | } |
239 | ||
ced04366 LZ |
240 | if (!(flags & ACPI_NO_DEVICE_INIT)) { |
241 | ||
242 | /* Walk namespace to execute all _INIs on present devices */ | |
243 | ||
244 | status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, | |
245 | ACPI_UINT32_MAX, FALSE, | |
246 | acpi_ns_init_one_device, NULL, | |
247 | &info, NULL); | |
248 | ||
249 | /* | |
250 | * Any _OSI requests should be completed by now. If the BIOS has | |
251 | * requested any Windows OSI strings, we will always truncate | |
252 | * I/O addresses to 16 bits -- for Windows compatibility. | |
253 | */ | |
254 | if (acpi_gbl_osi_data >= ACPI_OSI_WIN_2000) { | |
255 | acpi_gbl_truncate_io_addresses = TRUE; | |
256 | } | |
257 | ||
258 | ACPI_FREE(info.evaluate_info); | |
259 | if (ACPI_FAILURE(status)) { | |
260 | goto error_exit; | |
261 | } | |
262 | ||
263 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, | |
264 | " Executed %u _INI methods requiring %u _STA executions " | |
265 | "(examined %u objects)\n", | |
266 | info.num_INI, info.num_STA, | |
267 | info.device_count)); | |
b681f7d9 MG |
268 | } |
269 | ||
4be44fcd | 270 | return_ACPI_STATUS(status); |
4119532c | 271 | |
10622bf8 | 272 | error_exit: |
4119532c BM |
273 | ACPI_EXCEPTION((AE_INFO, status, "During device initialization")); |
274 | return_ACPI_STATUS(status); | |
1da177e4 LT |
275 | } |
276 | ||
1da177e4 LT |
277 | /******************************************************************************* |
278 | * | |
279 | * FUNCTION: acpi_ns_init_one_object | |
280 | * | |
281 | * PARAMETERS: obj_handle - Node | |
ba494bee BM |
282 | * level - Current nesting level |
283 | * context - Points to a init info struct | |
1da177e4 LT |
284 | * return_value - Not used |
285 | * | |
286 | * RETURN: Status | |
287 | * | |
288 | * DESCRIPTION: Callback from acpi_walk_namespace. Invoked for every object | |
289 | * within the namespace. | |
290 | * | |
291 | * Currently, the only objects that require initialization are: | |
292 | * 1) Methods | |
293 | * 2) Op Regions | |
294 | * | |
295 | ******************************************************************************/ | |
296 | ||
44f6c012 | 297 | static acpi_status |
4be44fcd LB |
298 | acpi_ns_init_one_object(acpi_handle obj_handle, |
299 | u32 level, void *context, void **return_value) | |
1da177e4 | 300 | { |
4be44fcd | 301 | acpi_object_type type; |
4d2acd9e | 302 | acpi_status status = AE_OK; |
4be44fcd LB |
303 | struct acpi_init_walk_info *info = |
304 | (struct acpi_init_walk_info *)context; | |
305 | struct acpi_namespace_node *node = | |
306 | (struct acpi_namespace_node *)obj_handle; | |
307 | union acpi_operand_object *obj_desc; | |
1da177e4 | 308 | |
b229cf92 | 309 | ACPI_FUNCTION_NAME(ns_init_one_object); |
1da177e4 LT |
310 | |
311 | info->object_count++; | |
312 | ||
313 | /* And even then, we are only interested in a few object types */ | |
314 | ||
4be44fcd LB |
315 | type = acpi_ns_get_type(obj_handle); |
316 | obj_desc = acpi_ns_get_attached_object(node); | |
1da177e4 LT |
317 | if (!obj_desc) { |
318 | return (AE_OK); | |
319 | } | |
320 | ||
321 | /* Increment counters for object types we are looking for */ | |
322 | ||
323 | switch (type) { | |
324 | case ACPI_TYPE_REGION: | |
1d1ea1b7 | 325 | |
1da177e4 LT |
326 | info->op_region_count++; |
327 | break; | |
328 | ||
329 | case ACPI_TYPE_BUFFER_FIELD: | |
1d1ea1b7 | 330 | |
1da177e4 LT |
331 | info->field_count++; |
332 | break; | |
333 | ||
ef805d95 | 334 | case ACPI_TYPE_LOCAL_BANK_FIELD: |
1d1ea1b7 | 335 | |
ef805d95 LM |
336 | info->field_count++; |
337 | break; | |
338 | ||
1da177e4 | 339 | case ACPI_TYPE_BUFFER: |
1d1ea1b7 | 340 | |
1da177e4 LT |
341 | info->buffer_count++; |
342 | break; | |
343 | ||
344 | case ACPI_TYPE_PACKAGE: | |
1d1ea1b7 | 345 | |
1da177e4 LT |
346 | info->package_count++; |
347 | break; | |
348 | ||
349 | default: | |
350 | ||
351 | /* No init required, just exit now */ | |
1d1ea1b7 | 352 | |
1da177e4 LT |
353 | return (AE_OK); |
354 | } | |
355 | ||
d4913dc6 BM |
356 | /* If the object is already initialized, nothing else to do */ |
357 | ||
1da177e4 LT |
358 | if (obj_desc->common.flags & AOPOBJ_DATA_VALID) { |
359 | return (AE_OK); | |
360 | } | |
361 | ||
d4913dc6 BM |
362 | /* Must lock the interpreter before executing AML code */ |
363 | ||
4d2acd9e | 364 | acpi_ex_enter_interpreter(); |
1da177e4 LT |
365 | |
366 | /* | |
367 | * Each of these types can contain executable AML code within the | |
368 | * declaration. | |
369 | */ | |
370 | switch (type) { | |
371 | case ACPI_TYPE_REGION: | |
372 | ||
373 | info->op_region_init++; | |
4be44fcd | 374 | status = acpi_ds_get_region_arguments(obj_desc); |
1da177e4 LT |
375 | break; |
376 | ||
377 | case ACPI_TYPE_BUFFER_FIELD: | |
378 | ||
379 | info->field_init++; | |
4be44fcd | 380 | status = acpi_ds_get_buffer_field_arguments(obj_desc); |
1da177e4 LT |
381 | break; |
382 | ||
ef805d95 LM |
383 | case ACPI_TYPE_LOCAL_BANK_FIELD: |
384 | ||
385 | info->field_init++; | |
386 | status = acpi_ds_get_bank_field_arguments(obj_desc); | |
387 | break; | |
388 | ||
1da177e4 LT |
389 | case ACPI_TYPE_BUFFER: |
390 | ||
391 | info->buffer_init++; | |
4be44fcd | 392 | status = acpi_ds_get_buffer_arguments(obj_desc); |
1da177e4 LT |
393 | break; |
394 | ||
395 | case ACPI_TYPE_PACKAGE: | |
396 | ||
397 | info->package_init++; | |
4be44fcd | 398 | status = acpi_ds_get_package_arguments(obj_desc); |
1da177e4 LT |
399 | break; |
400 | ||
401 | default: | |
1d1ea1b7 | 402 | |
1da177e4 | 403 | /* No other types can get here */ |
1d1ea1b7 | 404 | |
1da177e4 LT |
405 | break; |
406 | } | |
407 | ||
4be44fcd | 408 | if (ACPI_FAILURE(status)) { |
b8e4d893 BM |
409 | ACPI_EXCEPTION((AE_INFO, status, |
410 | "Could not execute arguments for [%4.4s] (%s)", | |
411 | acpi_ut_get_node_name(node), | |
412 | acpi_ut_get_type_name(type))); | |
1da177e4 LT |
413 | } |
414 | ||
1da177e4 LT |
415 | /* |
416 | * We ignore errors from above, and always return OK, since we don't want | |
417 | * to abort the walk on any single error. | |
418 | */ | |
4be44fcd | 419 | acpi_ex_exit_interpreter(); |
1da177e4 LT |
420 | return (AE_OK); |
421 | } | |
422 | ||
b229cf92 BM |
423 | /******************************************************************************* |
424 | * | |
425 | * FUNCTION: acpi_ns_find_ini_methods | |
426 | * | |
427 | * PARAMETERS: acpi_walk_callback | |
428 | * | |
429 | * RETURN: acpi_status | |
430 | * | |
431 | * DESCRIPTION: Called during namespace walk. Finds objects named _INI under | |
432 | * device/processor/thermal objects, and marks the entire subtree | |
433 | * with a SUBTREE_HAS_INI flag. This flag is used during the | |
434 | * subsequent device initialization walk to avoid entire subtrees | |
435 | * that do not contain an _INI. | |
436 | * | |
437 | ******************************************************************************/ | |
438 | ||
439 | static acpi_status | |
440 | acpi_ns_find_ini_methods(acpi_handle obj_handle, | |
441 | u32 nesting_level, void *context, void **return_value) | |
442 | { | |
443 | struct acpi_device_walk_info *info = | |
444 | ACPI_CAST_PTR(struct acpi_device_walk_info, context); | |
445 | struct acpi_namespace_node *node; | |
446 | struct acpi_namespace_node *parent_node; | |
447 | ||
448 | /* Keep count of device/processor/thermal objects */ | |
449 | ||
450 | node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_handle); | |
451 | if ((node->type == ACPI_TYPE_DEVICE) || | |
452 | (node->type == ACPI_TYPE_PROCESSOR) || | |
453 | (node->type == ACPI_TYPE_THERMAL)) { | |
454 | info->device_count++; | |
455 | return (AE_OK); | |
456 | } | |
457 | ||
458 | /* We are only looking for methods named _INI */ | |
459 | ||
460 | if (!ACPI_COMPARE_NAME(node->name.ascii, METHOD_NAME__INI)) { | |
461 | return (AE_OK); | |
462 | } | |
463 | ||
464 | /* | |
465 | * The only _INI methods that we care about are those that are | |
466 | * present under Device, Processor, and Thermal objects. | |
467 | */ | |
c45b5c09 | 468 | parent_node = node->parent; |
b229cf92 BM |
469 | switch (parent_node->type) { |
470 | case ACPI_TYPE_DEVICE: | |
471 | case ACPI_TYPE_PROCESSOR: | |
472 | case ACPI_TYPE_THERMAL: | |
473 | ||
474 | /* Mark parent and bubble up the INI present flag to the root */ | |
475 | ||
476 | while (parent_node) { | |
477 | parent_node->flags |= ANOBJ_SUBTREE_HAS_INI; | |
c45b5c09 | 478 | parent_node = parent_node->parent; |
b229cf92 BM |
479 | } |
480 | break; | |
481 | ||
482 | default: | |
1d1ea1b7 | 483 | |
b229cf92 BM |
484 | break; |
485 | } | |
486 | ||
487 | return (AE_OK); | |
488 | } | |
489 | ||
1da177e4 LT |
490 | /******************************************************************************* |
491 | * | |
492 | * FUNCTION: acpi_ns_init_one_device | |
493 | * | |
494 | * PARAMETERS: acpi_walk_callback | |
495 | * | |
496 | * RETURN: acpi_status | |
497 | * | |
498 | * DESCRIPTION: This is called once per device soon after ACPI is enabled | |
499 | * to initialize each device. It determines if the device is | |
500 | * present, and if so, calls _INI. | |
501 | * | |
502 | ******************************************************************************/ | |
503 | ||
44f6c012 | 504 | static acpi_status |
4be44fcd LB |
505 | acpi_ns_init_one_device(acpi_handle obj_handle, |
506 | u32 nesting_level, void *context, void **return_value) | |
1da177e4 | 507 | { |
4119532c | 508 | struct acpi_device_walk_info *walk_info = |
b229cf92 | 509 | ACPI_CAST_PTR(struct acpi_device_walk_info, context); |
4119532c | 510 | struct acpi_evaluate_info *info = walk_info->evaluate_info; |
4be44fcd LB |
511 | u32 flags; |
512 | acpi_status status; | |
defba1d8 | 513 | struct acpi_namespace_node *device_node; |
1da177e4 | 514 | |
b229cf92 | 515 | ACPI_FUNCTION_TRACE(ns_init_one_device); |
1da177e4 | 516 | |
b229cf92 | 517 | /* We are interested in Devices, Processors and thermal_zones only */ |
1da177e4 | 518 | |
b229cf92 | 519 | device_node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_handle); |
defba1d8 BM |
520 | if ((device_node->type != ACPI_TYPE_DEVICE) && |
521 | (device_node->type != ACPI_TYPE_PROCESSOR) && | |
522 | (device_node->type != ACPI_TYPE_THERMAL)) { | |
4be44fcd | 523 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
524 | } |
525 | ||
1da177e4 | 526 | /* |
b229cf92 BM |
527 | * Because of an earlier namespace analysis, all subtrees that contain an |
528 | * _INI method are tagged. | |
529 | * | |
530 | * If this device subtree does not contain any _INI methods, we | |
531 | * can exit now and stop traversing this entire subtree. | |
defba1d8 | 532 | */ |
b229cf92 BM |
533 | if (!(device_node->flags & ANOBJ_SUBTREE_HAS_INI)) { |
534 | return_ACPI_STATUS(AE_CTRL_DEPTH); | |
defba1d8 BM |
535 | } |
536 | ||
537 | /* | |
b229cf92 BM |
538 | * Run _STA to determine if this device is present and functioning. We |
539 | * must know this information for two important reasons (from ACPI spec): | |
540 | * | |
541 | * 1) We can only run _INI if the device is present. | |
542 | * 2) We must abort the device tree walk on this subtree if the device is | |
543 | * not present and is not functional (we will not examine the children) | |
544 | * | |
545 | * The _STA method is not required to be present under the device, we | |
546 | * assume the device is present if _STA does not exist. | |
1da177e4 | 547 | */ |
b229cf92 BM |
548 | ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname |
549 | (ACPI_TYPE_METHOD, device_node, METHOD_NAME__STA)); | |
1da177e4 | 550 | |
b229cf92 | 551 | status = acpi_ut_execute_STA(device_node, &flags); |
4be44fcd | 552 | if (ACPI_FAILURE(status)) { |
52fc0b02 | 553 | |
defba1d8 | 554 | /* Ignore error and move on to next device */ |
1da177e4 | 555 | |
defba1d8 BM |
556 | return_ACPI_STATUS(AE_OK); |
557 | } | |
1da177e4 | 558 | |
b229cf92 BM |
559 | /* |
560 | * Flags == -1 means that _STA was not found. In this case, we assume that | |
561 | * the device is both present and functional. | |
562 | * | |
563 | * From the ACPI spec, description of _STA: | |
564 | * | |
565 | * "If a device object (including the processor object) does not have an | |
566 | * _STA object, then OSPM assumes that all of the above bits are set (in | |
567 | * other words, the device is present, ..., and functioning)" | |
568 | */ | |
defba1d8 | 569 | if (flags != ACPI_UINT32_MAX) { |
4119532c | 570 | walk_info->num_STA++; |
defba1d8 | 571 | } |
1da177e4 | 572 | |
b229cf92 BM |
573 | /* |
574 | * Examine the PRESENT and FUNCTIONING status bits | |
575 | * | |
576 | * Note: ACPI spec does not seem to specify behavior for the present but | |
577 | * not functioning case, so we assume functioning if present. | |
578 | */ | |
defba1d8 | 579 | if (!(flags & ACPI_STA_DEVICE_PRESENT)) { |
52fc0b02 | 580 | |
b229cf92 BM |
581 | /* Device is not present, we must examine the Functioning bit */ |
582 | ||
583 | if (flags & ACPI_STA_DEVICE_FUNCTIONING) { | |
584 | /* | |
585 | * Device is not present but is "functioning". In this case, | |
586 | * we will not run _INI, but we continue to examine the children | |
587 | * of this device. | |
588 | * | |
ba494bee | 589 | * From the ACPI spec, description of _STA: (note - no mention |
b229cf92 BM |
590 | * of whether to run _INI or not on the device in question) |
591 | * | |
592 | * "_STA may return bit 0 clear (not present) with bit 3 set | |
593 | * (device is functional). This case is used to indicate a valid | |
594 | * device for which no device driver should be loaded (for example, | |
595 | * a bridge device.) Children of this device may be present and | |
596 | * valid. OSPM should continue enumeration below a device whose | |
597 | * _STA returns this bit combination" | |
598 | */ | |
599 | return_ACPI_STATUS(AE_OK); | |
600 | } else { | |
601 | /* | |
602 | * Device is not present and is not functioning. We must abort the | |
603 | * walk of this subtree immediately -- don't look at the children | |
604 | * of such a device. | |
605 | * | |
606 | * From the ACPI spec, description of _INI: | |
607 | * | |
608 | * "If the _STA method indicates that the device is not present, | |
609 | * OSPM will not run the _INI and will not examine the children | |
610 | * of the device for _INI methods" | |
611 | */ | |
612 | return_ACPI_STATUS(AE_CTRL_DEPTH); | |
613 | } | |
1da177e4 LT |
614 | } |
615 | ||
616 | /* | |
b229cf92 BM |
617 | * The device is present or is assumed present if no _STA exists. |
618 | * Run the _INI if it exists (not required to exist) | |
619 | * | |
620 | * Note: We know there is an _INI within this subtree, but it may not be | |
621 | * under this particular device, it may be lower in the branch. | |
1da177e4 | 622 | */ |
2d3349de LZ |
623 | if (!ACPI_COMPARE_NAME(device_node->name.ascii, "_SB_") || |
624 | device_node->parent != acpi_gbl_root_node) { | |
625 | ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname | |
626 | (ACPI_TYPE_METHOD, device_node, | |
627 | METHOD_NAME__INI)); | |
628 | ||
629 | memset(info, 0, sizeof(struct acpi_evaluate_info)); | |
630 | info->prefix_node = device_node; | |
631 | info->relative_pathname = METHOD_NAME__INI; | |
632 | info->parameters = NULL; | |
633 | info->flags = ACPI_IGNORE_RETURN_VALUE; | |
634 | ||
635 | status = acpi_ns_evaluate(info); | |
636 | if (ACPI_SUCCESS(status)) { | |
637 | walk_info->num_INI++; | |
638 | } | |
b229cf92 | 639 | #ifdef ACPI_DEBUG_OUTPUT |
2d3349de | 640 | else if (status != AE_NOT_FOUND) { |
1da177e4 | 641 | |
2d3349de | 642 | /* Ignore error and move on to next device */ |
b229cf92 | 643 | |
2d3349de LZ |
644 | char *scope_name = |
645 | acpi_ns_get_normalized_pathname(device_node, TRUE); | |
52fc0b02 | 646 | |
2d3349de LZ |
647 | ACPI_EXCEPTION((AE_INFO, status, |
648 | "during %s._INI execution", | |
649 | scope_name)); | |
650 | ACPI_FREE(scope_name); | |
651 | } | |
b229cf92 | 652 | #endif |
2d3349de | 653 | } |
1da177e4 | 654 | |
4c90ece2 BM |
655 | /* Ignore errors from above */ |
656 | ||
657 | status = AE_OK; | |
658 | ||
4119532c BM |
659 | /* |
660 | * The _INI method has been run if present; call the Global Initialization | |
661 | * Handler for this device. | |
662 | */ | |
b229cf92 | 663 | if (acpi_gbl_init_handler) { |
4be44fcd | 664 | status = |
4119532c | 665 | acpi_gbl_init_handler(device_node, ACPI_INIT_DEVICE_INI); |
1da177e4 LT |
666 | } |
667 | ||
4119532c | 668 | return_ACPI_STATUS(status); |
1da177e4 | 669 | } |