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1/******************************************************************************
2 *
3 * Module Name: nsinit - namespace initialization
4 *
5 *****************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2012, Intel Corp.
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 "accommon.h"
46#include "acnamesp.h"
47#include "acdispat.h"
48#include "acinterp.h"
49#include <linux/nmi.h>
50
51#define _COMPONENT ACPI_NAMESPACE
52ACPI_MODULE_NAME("nsinit")
53
54/* Local prototypes */
55static acpi_status
56acpi_ns_init_one_object(acpi_handle obj_handle,
57 u32 level, void *context, void **return_value);
58
59static acpi_status
60acpi_ns_init_one_device(acpi_handle obj_handle,
61 u32 nesting_level, void *context, void **return_value);
62
63static acpi_status
64acpi_ns_find_ini_methods(acpi_handle obj_handle,
65 u32 nesting_level, void *context, void **return_value);
66
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
80acpi_status acpi_ns_initialize_objects(void)
81{
82 acpi_status status;
83 struct acpi_init_walk_info info;
84
85 ACPI_FUNCTION_TRACE(ns_initialize_objects);
86
87 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
88 "**** Starting initialization of namespace objects ****\n"));
89 ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
90 "Completing Region/Field/Buffer/Package initialization:"));
91
92 /* Set all init info to zero */
93
94 ACPI_MEMSET(&info, 0, sizeof(struct acpi_init_walk_info));
95
96 /* Walk entire namespace from the supplied root */
97
98 status = acpi_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
99 ACPI_UINT32_MAX, acpi_ns_init_one_object, NULL,
100 &info, NULL);
101 if (ACPI_FAILURE(status)) {
102 ACPI_EXCEPTION((AE_INFO, status, "During WalkNamespace"));
103 }
104
105 ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
106 "\nInitialized %u/%u Regions %u/%u Fields %u/%u "
107 "Buffers %u/%u Packages (%u nodes)\n",
108 info.op_region_init, info.op_region_count,
109 info.field_init, info.field_count,
110 info.buffer_init, info.buffer_count,
111 info.package_init, info.package_count,
112 info.object_count));
113
114 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
115 "%u Control Methods found\n", info.method_count));
116 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
117 "%u Op Regions found\n", info.op_region_count));
118
119 return_ACPI_STATUS(AE_OK);
120}
121
122/*******************************************************************************
123 *
124 * FUNCTION: acpi_ns_initialize_devices
125 *
126 * PARAMETERS: None
127 *
128 * RETURN: acpi_status
129 *
130 * DESCRIPTION: Walk the entire namespace and initialize all ACPI devices.
131 * This means running _INI on all present devices.
132 *
133 * Note: We install PCI config space handler on region access,
134 * not here.
135 *
136 ******************************************************************************/
137
138acpi_status acpi_ns_initialize_devices(void)
139{
140 acpi_status status;
141 struct acpi_device_walk_info info;
142
143 ACPI_FUNCTION_TRACE(ns_initialize_devices);
144
145 /* Init counters */
146
147 info.device_count = 0;
148 info.num_STA = 0;
149 info.num_INI = 0;
150
151 ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
152 "Initializing Device/Processor/Thermal objects "
153 "by executing _INI methods:"));
154
155 /* Tree analysis: find all subtrees that contain _INI methods */
156
157 status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
158 ACPI_UINT32_MAX, FALSE,
159 acpi_ns_find_ini_methods, NULL, &info,
160 NULL);
161 if (ACPI_FAILURE(status)) {
162 goto error_exit;
163 }
164
165 /* Allocate the evaluation information block */
166
167 info.evaluate_info =
168 ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info));
169 if (!info.evaluate_info) {
170 status = AE_NO_MEMORY;
171 goto error_exit;
172 }
173
174 /*
175 * Execute the "global" _INI method that may appear at the root. This
176 * support is provided for Windows compatibility (Vista+) and is not
177 * part of the ACPI specification.
178 */
179 info.evaluate_info->prefix_node = acpi_gbl_root_node;
180 info.evaluate_info->pathname = METHOD_NAME__INI;
181 info.evaluate_info->parameters = NULL;
182 info.evaluate_info->flags = ACPI_IGNORE_RETURN_VALUE;
183
184 status = acpi_ns_evaluate(info.evaluate_info);
185 if (ACPI_SUCCESS(status)) {
186 info.num_INI++;
187 }
188
189 /* Walk namespace to execute all _INIs on present devices */
190
191 status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
192 ACPI_UINT32_MAX, FALSE,
193 acpi_ns_init_one_device, NULL, &info,
194 NULL);
195
196 /*
197 * Any _OSI requests should be completed by now. If the BIOS has
198 * requested any Windows OSI strings, we will always truncate
199 * I/O addresses to 16 bits -- for Windows compatibility.
200 */
201 if (acpi_gbl_osi_data >= ACPI_OSI_WIN_2000) {
202 acpi_gbl_truncate_io_addresses = TRUE;
203 }
204
205 ACPI_FREE(info.evaluate_info);
206 if (ACPI_FAILURE(status)) {
207 goto error_exit;
208 }
209
210 ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
211 "\nExecuted %u _INI methods requiring %u _STA executions "
212 "(examined %u objects)\n",
213 info.num_INI, info.num_STA, info.device_count));
214
215 return_ACPI_STATUS(status);
216
217 error_exit:
218 ACPI_EXCEPTION((AE_INFO, status, "During device initialization"));
219 return_ACPI_STATUS(status);
220}
221
222/*******************************************************************************
223 *
224 * FUNCTION: acpi_ns_init_one_object
225 *
226 * PARAMETERS: obj_handle - Node
227 * Level - Current nesting level
228 * Context - Points to a init info struct
229 * return_value - Not used
230 *
231 * RETURN: Status
232 *
233 * DESCRIPTION: Callback from acpi_walk_namespace. Invoked for every object
234 * within the namespace.
235 *
236 * Currently, the only objects that require initialization are:
237 * 1) Methods
238 * 2) Op Regions
239 *
240 ******************************************************************************/
241
242static acpi_status
243acpi_ns_init_one_object(acpi_handle obj_handle,
244 u32 level, void *context, void **return_value)
245{
246 acpi_object_type type;
247 acpi_status status = AE_OK;
248 struct acpi_init_walk_info *info =
249 (struct acpi_init_walk_info *)context;
250 struct acpi_namespace_node *node =
251 (struct acpi_namespace_node *)obj_handle;
252 union acpi_operand_object *obj_desc;
253
254 ACPI_FUNCTION_NAME(ns_init_one_object);
255
256 info->object_count++;
257
258 /* And even then, we are only interested in a few object types */
259
260 type = acpi_ns_get_type(obj_handle);
261 obj_desc = acpi_ns_get_attached_object(node);
262 if (!obj_desc) {
263 return (AE_OK);
264 }
265
266 /* Increment counters for object types we are looking for */
267
268 switch (type) {
269 case ACPI_TYPE_REGION:
270 info->op_region_count++;
271 break;
272
273 case ACPI_TYPE_BUFFER_FIELD:
274 info->field_count++;
275 break;
276
277 case ACPI_TYPE_LOCAL_BANK_FIELD:
278 info->field_count++;
279 break;
280
281 case ACPI_TYPE_BUFFER:
282 info->buffer_count++;
283 break;
284
285 case ACPI_TYPE_PACKAGE:
286 info->package_count++;
287 break;
288
289 default:
290
291 /* No init required, just exit now */
292 return (AE_OK);
293 }
294
295 /* If the object is already initialized, nothing else to do */
296
297 if (obj_desc->common.flags & AOPOBJ_DATA_VALID) {
298 return (AE_OK);
299 }
300
301 /* Must lock the interpreter before executing AML code */
302
303 acpi_ex_enter_interpreter();
304
305 /*
306 * Each of these types can contain executable AML code within the
307 * declaration.
308 */
309 switch (type) {
310 case ACPI_TYPE_REGION:
311
312 info->op_region_init++;
313 status = acpi_ds_get_region_arguments(obj_desc);
314 break;
315
316 case ACPI_TYPE_BUFFER_FIELD:
317
318 info->field_init++;
319 status = acpi_ds_get_buffer_field_arguments(obj_desc);
320 break;
321
322 case ACPI_TYPE_LOCAL_BANK_FIELD:
323
324 info->field_init++;
325 status = acpi_ds_get_bank_field_arguments(obj_desc);
326 break;
327
328 case ACPI_TYPE_BUFFER:
329
330 info->buffer_init++;
331 status = acpi_ds_get_buffer_arguments(obj_desc);
332 break;
333
334 case ACPI_TYPE_PACKAGE:
335
336 info->package_init++;
337 status = acpi_ds_get_package_arguments(obj_desc);
338 break;
339
340 default:
341 /* No other types can get here */
342 break;
343 }
344
345 if (ACPI_FAILURE(status)) {
346 ACPI_EXCEPTION((AE_INFO, status,
347 "Could not execute arguments for [%4.4s] (%s)",
348 acpi_ut_get_node_name(node),
349 acpi_ut_get_type_name(type)));
350 }
351
352 /*
353 * Print a dot for each object unless we are going to print the entire
354 * pathname
355 */
356 if (!(acpi_dbg_level & ACPI_LV_INIT_NAMES)) {
357 ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, "."));
358 }
359
360 /*
361 * We ignore errors from above, and always return OK, since we don't want
362 * to abort the walk on any single error.
363 */
364 acpi_ex_exit_interpreter();
365 return (AE_OK);
366}
367
368/*******************************************************************************
369 *
370 * FUNCTION: acpi_ns_find_ini_methods
371 *
372 * PARAMETERS: acpi_walk_callback
373 *
374 * RETURN: acpi_status
375 *
376 * DESCRIPTION: Called during namespace walk. Finds objects named _INI under
377 * device/processor/thermal objects, and marks the entire subtree
378 * with a SUBTREE_HAS_INI flag. This flag is used during the
379 * subsequent device initialization walk to avoid entire subtrees
380 * that do not contain an _INI.
381 *
382 ******************************************************************************/
383
384static acpi_status
385acpi_ns_find_ini_methods(acpi_handle obj_handle,
386 u32 nesting_level, void *context, void **return_value)
387{
388 struct acpi_device_walk_info *info =
389 ACPI_CAST_PTR(struct acpi_device_walk_info, context);
390 struct acpi_namespace_node *node;
391 struct acpi_namespace_node *parent_node;
392
393 /* Keep count of device/processor/thermal objects */
394
395 node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_handle);
396 if ((node->type == ACPI_TYPE_DEVICE) ||
397 (node->type == ACPI_TYPE_PROCESSOR) ||
398 (node->type == ACPI_TYPE_THERMAL)) {
399 info->device_count++;
400 return (AE_OK);
401 }
402
403 /* We are only looking for methods named _INI */
404
405 if (!ACPI_COMPARE_NAME(node->name.ascii, METHOD_NAME__INI)) {
406 return (AE_OK);
407 }
408
409 /*
410 * The only _INI methods that we care about are those that are
411 * present under Device, Processor, and Thermal objects.
412 */
413 parent_node = node->parent;
414 switch (parent_node->type) {
415 case ACPI_TYPE_DEVICE:
416 case ACPI_TYPE_PROCESSOR:
417 case ACPI_TYPE_THERMAL:
418
419 /* Mark parent and bubble up the INI present flag to the root */
420
421 while (parent_node) {
422 parent_node->flags |= ANOBJ_SUBTREE_HAS_INI;
423 parent_node = parent_node->parent;
424 }
425 break;
426
427 default:
428 break;
429 }
430
431 return (AE_OK);
432}
433
434/*******************************************************************************
435 *
436 * FUNCTION: acpi_ns_init_one_device
437 *
438 * PARAMETERS: acpi_walk_callback
439 *
440 * RETURN: acpi_status
441 *
442 * DESCRIPTION: This is called once per device soon after ACPI is enabled
443 * to initialize each device. It determines if the device is
444 * present, and if so, calls _INI.
445 *
446 ******************************************************************************/
447
448static acpi_status
449acpi_ns_init_one_device(acpi_handle obj_handle,
450 u32 nesting_level, void *context, void **return_value)
451{
452 struct acpi_device_walk_info *walk_info =
453 ACPI_CAST_PTR(struct acpi_device_walk_info, context);
454 struct acpi_evaluate_info *info = walk_info->evaluate_info;
455 u32 flags;
456 acpi_status status;
457 struct acpi_namespace_node *device_node;
458
459 ACPI_FUNCTION_TRACE(ns_init_one_device);
460
461 /* We are interested in Devices, Processors and thermal_zones only */
462
463 device_node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_handle);
464 if ((device_node->type != ACPI_TYPE_DEVICE) &&
465 (device_node->type != ACPI_TYPE_PROCESSOR) &&
466 (device_node->type != ACPI_TYPE_THERMAL)) {
467 return_ACPI_STATUS(AE_OK);
468 }
469
470 /*
471 * Because of an earlier namespace analysis, all subtrees that contain an
472 * _INI method are tagged.
473 *
474 * If this device subtree does not contain any _INI methods, we
475 * can exit now and stop traversing this entire subtree.
476 */
477 if (!(device_node->flags & ANOBJ_SUBTREE_HAS_INI)) {
478 return_ACPI_STATUS(AE_CTRL_DEPTH);
479 }
480
481 /*
482 * Run _STA to determine if this device is present and functioning. We
483 * must know this information for two important reasons (from ACPI spec):
484 *
485 * 1) We can only run _INI if the device is present.
486 * 2) We must abort the device tree walk on this subtree if the device is
487 * not present and is not functional (we will not examine the children)
488 *
489 * The _STA method is not required to be present under the device, we
490 * assume the device is present if _STA does not exist.
491 */
492 ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname
493 (ACPI_TYPE_METHOD, device_node, METHOD_NAME__STA));
494
495 status = acpi_ut_execute_STA(device_node, &flags);
496 if (ACPI_FAILURE(status)) {
497
498 /* Ignore error and move on to next device */
499
500 return_ACPI_STATUS(AE_OK);
501 }
502
503 /*
504 * Flags == -1 means that _STA was not found. In this case, we assume that
505 * the device is both present and functional.
506 *
507 * From the ACPI spec, description of _STA:
508 *
509 * "If a device object (including the processor object) does not have an
510 * _STA object, then OSPM assumes that all of the above bits are set (in
511 * other words, the device is present, ..., and functioning)"
512 */
513 if (flags != ACPI_UINT32_MAX) {
514 walk_info->num_STA++;
515 }
516
517 /*
518 * Examine the PRESENT and FUNCTIONING status bits
519 *
520 * Note: ACPI spec does not seem to specify behavior for the present but
521 * not functioning case, so we assume functioning if present.
522 */
523 if (!(flags & ACPI_STA_DEVICE_PRESENT)) {
524
525 /* Device is not present, we must examine the Functioning bit */
526
527 if (flags & ACPI_STA_DEVICE_FUNCTIONING) {
528 /*
529 * Device is not present but is "functioning". In this case,
530 * we will not run _INI, but we continue to examine the children
531 * of this device.
532 *
533 * From the ACPI spec, description of _STA: (Note - no mention
534 * of whether to run _INI or not on the device in question)
535 *
536 * "_STA may return bit 0 clear (not present) with bit 3 set
537 * (device is functional). This case is used to indicate a valid
538 * device for which no device driver should be loaded (for example,
539 * a bridge device.) Children of this device may be present and
540 * valid. OSPM should continue enumeration below a device whose
541 * _STA returns this bit combination"
542 */
543 return_ACPI_STATUS(AE_OK);
544 } else {
545 /*
546 * Device is not present and is not functioning. We must abort the
547 * walk of this subtree immediately -- don't look at the children
548 * of such a device.
549 *
550 * From the ACPI spec, description of _INI:
551 *
552 * "If the _STA method indicates that the device is not present,
553 * OSPM will not run the _INI and will not examine the children
554 * of the device for _INI methods"
555 */
556 return_ACPI_STATUS(AE_CTRL_DEPTH);
557 }
558 }
559
560 /*
561 * The device is present or is assumed present if no _STA exists.
562 * Run the _INI if it exists (not required to exist)
563 *
564 * Note: We know there is an _INI within this subtree, but it may not be
565 * under this particular device, it may be lower in the branch.
566 */
567 ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname
568 (ACPI_TYPE_METHOD, device_node, METHOD_NAME__INI));
569
570 info->prefix_node = device_node;
571 info->pathname = METHOD_NAME__INI;
572 info->parameters = NULL;
573 info->flags = ACPI_IGNORE_RETURN_VALUE;
574
575 /*
576 * Some hardware relies on this being executed as atomically
577 * as possible (without an NMI being received in the middle of
578 * this) - so disable NMIs and initialize the device:
579 */
580 status = acpi_ns_evaluate(info);
581
582 if (ACPI_SUCCESS(status)) {
583 walk_info->num_INI++;
584
585 if ((acpi_dbg_level <= ACPI_LV_ALL_EXCEPTIONS) &&
586 (!(acpi_dbg_level & ACPI_LV_INFO))) {
587 ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, "."));
588 }
589 }
590#ifdef ACPI_DEBUG_OUTPUT
591 else if (status != AE_NOT_FOUND) {
592
593 /* Ignore error and move on to next device */
594
595 char *scope_name =
596 acpi_ns_get_external_pathname(info->resolved_node);
597
598 ACPI_EXCEPTION((AE_INFO, status, "during %s._INI execution",
599 scope_name));
600 ACPI_FREE(scope_name);
601 }
602#endif
603
604 /* Ignore errors from above */
605
606 status = AE_OK;
607
608 /*
609 * The _INI method has been run if present; call the Global Initialization
610 * Handler for this device.
611 */
612 if (acpi_gbl_init_handler) {
613 status =
614 acpi_gbl_init_handler(device_node, ACPI_INIT_DEVICE_INI);
615 }
616
617 return_ACPI_STATUS(status);
618}
1/******************************************************************************
2 *
3 * Module Name: nsinit - namespace initialization
4 *
5 *****************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2016, Intel Corp.
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 "accommon.h"
46#include "acnamesp.h"
47#include "acdispat.h"
48#include "acinterp.h"
49#include "acevents.h"
50
51#define _COMPONENT ACPI_NAMESPACE
52ACPI_MODULE_NAME("nsinit")
53
54/* Local prototypes */
55static acpi_status
56acpi_ns_init_one_object(acpi_handle obj_handle,
57 u32 level, void *context, void **return_value);
58
59static acpi_status
60acpi_ns_init_one_device(acpi_handle obj_handle,
61 u32 nesting_level, void *context, void **return_value);
62
63static acpi_status
64acpi_ns_find_ini_methods(acpi_handle obj_handle,
65 u32 nesting_level, void *context, void **return_value);
66
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
80acpi_status acpi_ns_initialize_objects(void)
81{
82 acpi_status status;
83 struct acpi_init_walk_info info;
84
85 ACPI_FUNCTION_TRACE(ns_initialize_objects);
86
87 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
88 "[Init] Completing Initialization of ACPI Objects\n"));
89 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
90 "**** Starting initialization of namespace objects ****\n"));
91 ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
92 "Completing Region/Field/Buffer/Package initialization:\n"));
93
94 /* Set all init info to zero */
95
96 memset(&info, 0, sizeof(struct acpi_init_walk_info));
97
98 /* Walk entire namespace from the supplied root */
99
100 status = acpi_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
101 ACPI_UINT32_MAX, acpi_ns_init_one_object,
102 NULL, &info, NULL);
103 if (ACPI_FAILURE(status)) {
104 ACPI_EXCEPTION((AE_INFO, status, "During WalkNamespace"));
105 }
106
107 ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
108 " Initialized %u/%u Regions %u/%u Fields %u/%u "
109 "Buffers %u/%u Packages (%u nodes)\n",
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));
115
116 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
117 "%u Control Methods found\n%u Op Regions found\n",
118 info.method_count, info.op_region_count));
119
120 return_ACPI_STATUS(AE_OK);
121}
122
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
139acpi_status acpi_ns_initialize_devices(u32 flags)
140{
141 acpi_status status = AE_OK;
142 struct acpi_device_walk_info info;
143 acpi_handle handle;
144
145 ACPI_FUNCTION_TRACE(ns_initialize_devices);
146
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 }
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 }
215 }
216
217 /*
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).
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.
229 */
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 }
238 }
239
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));
268 }
269
270 return_ACPI_STATUS(status);
271
272error_exit:
273 ACPI_EXCEPTION((AE_INFO, status, "During device initialization"));
274 return_ACPI_STATUS(status);
275}
276
277/*******************************************************************************
278 *
279 * FUNCTION: acpi_ns_init_one_object
280 *
281 * PARAMETERS: obj_handle - Node
282 * level - Current nesting level
283 * context - Points to a init info struct
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
297static acpi_status
298acpi_ns_init_one_object(acpi_handle obj_handle,
299 u32 level, void *context, void **return_value)
300{
301 acpi_object_type type;
302 acpi_status status = AE_OK;
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;
308
309 ACPI_FUNCTION_NAME(ns_init_one_object);
310
311 info->object_count++;
312
313 /* And even then, we are only interested in a few object types */
314
315 type = acpi_ns_get_type(obj_handle);
316 obj_desc = acpi_ns_get_attached_object(node);
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:
325
326 info->op_region_count++;
327 break;
328
329 case ACPI_TYPE_BUFFER_FIELD:
330
331 info->field_count++;
332 break;
333
334 case ACPI_TYPE_LOCAL_BANK_FIELD:
335
336 info->field_count++;
337 break;
338
339 case ACPI_TYPE_BUFFER:
340
341 info->buffer_count++;
342 break;
343
344 case ACPI_TYPE_PACKAGE:
345
346 info->package_count++;
347 break;
348
349 default:
350
351 /* No init required, just exit now */
352
353 return (AE_OK);
354 }
355
356 /* If the object is already initialized, nothing else to do */
357
358 if (obj_desc->common.flags & AOPOBJ_DATA_VALID) {
359 return (AE_OK);
360 }
361
362 /* Must lock the interpreter before executing AML code */
363
364 acpi_ex_enter_interpreter();
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++;
374 status = acpi_ds_get_region_arguments(obj_desc);
375 break;
376
377 case ACPI_TYPE_BUFFER_FIELD:
378
379 info->field_init++;
380 status = acpi_ds_get_buffer_field_arguments(obj_desc);
381 break;
382
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
389 case ACPI_TYPE_BUFFER:
390
391 info->buffer_init++;
392 status = acpi_ds_get_buffer_arguments(obj_desc);
393 break;
394
395 case ACPI_TYPE_PACKAGE:
396
397 info->package_init++;
398 status = acpi_ds_get_package_arguments(obj_desc);
399 break;
400
401 default:
402
403 /* No other types can get here */
404
405 break;
406 }
407
408 if (ACPI_FAILURE(status)) {
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)));
413 }
414
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 */
419 acpi_ex_exit_interpreter();
420 return (AE_OK);
421}
422
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
439static acpi_status
440acpi_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 */
468 parent_node = node->parent;
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;
478 parent_node = parent_node->parent;
479 }
480 break;
481
482 default:
483
484 break;
485 }
486
487 return (AE_OK);
488}
489
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
504static acpi_status
505acpi_ns_init_one_device(acpi_handle obj_handle,
506 u32 nesting_level, void *context, void **return_value)
507{
508 struct acpi_device_walk_info *walk_info =
509 ACPI_CAST_PTR(struct acpi_device_walk_info, context);
510 struct acpi_evaluate_info *info = walk_info->evaluate_info;
511 u32 flags;
512 acpi_status status;
513 struct acpi_namespace_node *device_node;
514
515 ACPI_FUNCTION_TRACE(ns_init_one_device);
516
517 /* We are interested in Devices, Processors and thermal_zones only */
518
519 device_node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_handle);
520 if ((device_node->type != ACPI_TYPE_DEVICE) &&
521 (device_node->type != ACPI_TYPE_PROCESSOR) &&
522 (device_node->type != ACPI_TYPE_THERMAL)) {
523 return_ACPI_STATUS(AE_OK);
524 }
525
526 /*
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.
532 */
533 if (!(device_node->flags & ANOBJ_SUBTREE_HAS_INI)) {
534 return_ACPI_STATUS(AE_CTRL_DEPTH);
535 }
536
537 /*
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.
547 */
548 ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname
549 (ACPI_TYPE_METHOD, device_node, METHOD_NAME__STA));
550
551 status = acpi_ut_execute_STA(device_node, &flags);
552 if (ACPI_FAILURE(status)) {
553
554 /* Ignore error and move on to next device */
555
556 return_ACPI_STATUS(AE_OK);
557 }
558
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 */
569 if (flags != ACPI_UINT32_MAX) {
570 walk_info->num_STA++;
571 }
572
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 */
579 if (!(flags & ACPI_STA_DEVICE_PRESENT)) {
580
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 *
589 * From the ACPI spec, description of _STA: (note - no mention
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 }
614 }
615
616 /*
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.
622 */
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 }
639#ifdef ACPI_DEBUG_OUTPUT
640 else if (status != AE_NOT_FOUND) {
641
642 /* Ignore error and move on to next device */
643
644 char *scope_name =
645 acpi_ns_get_normalized_pathname(device_node, TRUE);
646
647 ACPI_EXCEPTION((AE_INFO, status,
648 "during %s._INI execution",
649 scope_name));
650 ACPI_FREE(scope_name);
651 }
652#endif
653 }
654
655 /* Ignore errors from above */
656
657 status = AE_OK;
658
659 /*
660 * The _INI method has been run if present; call the Global Initialization
661 * Handler for this device.
662 */
663 if (acpi_gbl_init_handler) {
664 status =
665 acpi_gbl_init_handler(device_node, ACPI_INIT_DEVICE_INI);
666 }
667
668 return_ACPI_STATUS(status);
669}