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1/******************************************************************************
2 *
3 * Module Name: nsinit - namespace initialization
4 *
5 *****************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2011, 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
144 ACPI_FUNCTION_TRACE(ns_initialize_devices);
145
146 if (!(flags & ACPI_NO_DEVICE_INIT)) {
147 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
148 "[Init] Initializing ACPI Devices\n"));
149
150 /* Init counters */
151
152 info.device_count = 0;
153 info.num_STA = 0;
154 info.num_INI = 0;
155
156 ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
157 "Initializing Device/Processor/Thermal objects "
158 "and executing _INI/_STA methods:\n"));
159
160 /* Tree analysis: find all subtrees that contain _INI methods */
161
162 status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
163 ACPI_UINT32_MAX, FALSE,
164 acpi_ns_find_ini_methods, NULL,
165 &info, NULL);
166 if (ACPI_FAILURE(status)) {
167 goto error_exit;
168 }
169
170 /* Allocate the evaluation information block */
171
172 info.evaluate_info =
173 ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info));
174 if (!info.evaluate_info) {
175 status = AE_NO_MEMORY;
176 goto error_exit;
177 }
178
179 /*
180 * Execute the "global" _INI method that may appear at the root.
181 * This support is provided for Windows compatibility (Vista+) and
182 * is not part of the ACPI specification.
183 */
184 info.evaluate_info->prefix_node = acpi_gbl_root_node;
185 info.evaluate_info->relative_pathname = METHOD_NAME__INI;
186 info.evaluate_info->parameters = NULL;
187 info.evaluate_info->flags = ACPI_IGNORE_RETURN_VALUE;
188
189 status = acpi_ns_evaluate(info.evaluate_info);
190 if (ACPI_SUCCESS(status)) {
191 info.num_INI++;
192 }
193 }
194
195 /*
196 * Run all _REG methods
197 *
198 * Note: Any objects accessed by the _REG methods will be automatically
199 * initialized, even if they contain executable AML (see the call to
200 * acpi_ns_initialize_objects below).
201 */
202 if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) {
203 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
204 "[Init] Executing _REG OpRegion methods\n"));
205
206 status = acpi_ev_initialize_op_regions();
207 if (ACPI_FAILURE(status)) {
208 goto error_exit;
209 }
210 }
211
212 if (!(flags & ACPI_NO_DEVICE_INIT)) {
213
214 /* Walk namespace to execute all _INIs on present devices */
215
216 status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
217 ACPI_UINT32_MAX, FALSE,
218 acpi_ns_init_one_device, NULL,
219 &info, NULL);
220
221 /*
222 * Any _OSI requests should be completed by now. If the BIOS has
223 * requested any Windows OSI strings, we will always truncate
224 * I/O addresses to 16 bits -- for Windows compatibility.
225 */
226 if (acpi_gbl_osi_data >= ACPI_OSI_WIN_2000) {
227 acpi_gbl_truncate_io_addresses = TRUE;
228 }
229
230 ACPI_FREE(info.evaluate_info);
231 if (ACPI_FAILURE(status)) {
232 goto error_exit;
233 }
234
235 ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
236 " Executed %u _INI methods requiring %u _STA executions "
237 "(examined %u objects)\n",
238 info.num_INI, info.num_STA,
239 info.device_count));
240 }
241
242 return_ACPI_STATUS(status);
243
244error_exit:
245 ACPI_EXCEPTION((AE_INFO, status, "During device initialization"));
246 return_ACPI_STATUS(status);
247}
248
249/*******************************************************************************
250 *
251 * FUNCTION: acpi_ns_init_one_object
252 *
253 * PARAMETERS: obj_handle - Node
254 * level - Current nesting level
255 * context - Points to a init info struct
256 * return_value - Not used
257 *
258 * RETURN: Status
259 *
260 * DESCRIPTION: Callback from acpi_walk_namespace. Invoked for every object
261 * within the namespace.
262 *
263 * Currently, the only objects that require initialization are:
264 * 1) Methods
265 * 2) Op Regions
266 *
267 ******************************************************************************/
268
269static acpi_status
270acpi_ns_init_one_object(acpi_handle obj_handle,
271 u32 level, void *context, void **return_value)
272{
273 acpi_object_type type;
274 acpi_status status = AE_OK;
275 struct acpi_init_walk_info *info =
276 (struct acpi_init_walk_info *)context;
277 struct acpi_namespace_node *node =
278 (struct acpi_namespace_node *)obj_handle;
279 union acpi_operand_object *obj_desc;
280
281 ACPI_FUNCTION_NAME(ns_init_one_object);
282
283 info->object_count++;
284
285 /* And even then, we are only interested in a few object types */
286
287 type = acpi_ns_get_type(obj_handle);
288 obj_desc = acpi_ns_get_attached_object(node);
289 if (!obj_desc) {
290 return (AE_OK);
291 }
292
293 /* Increment counters for object types we are looking for */
294
295 switch (type) {
296 case ACPI_TYPE_REGION:
297
298 info->op_region_count++;
299 break;
300
301 case ACPI_TYPE_BUFFER_FIELD:
302
303 info->field_count++;
304 break;
305
306 case ACPI_TYPE_LOCAL_BANK_FIELD:
307
308 info->field_count++;
309 break;
310
311 case ACPI_TYPE_BUFFER:
312
313 info->buffer_count++;
314 break;
315
316 case ACPI_TYPE_PACKAGE:
317
318 info->package_count++;
319 break;
320
321 default:
322
323 /* No init required, just exit now */
324
325 return (AE_OK);
326 }
327
328 /* If the object is already initialized, nothing else to do */
329
330 if (obj_desc->common.flags & AOPOBJ_DATA_VALID) {
331 return (AE_OK);
332 }
333
334 /* Must lock the interpreter before executing AML code */
335
336 acpi_ex_enter_interpreter();
337
338 /*
339 * Each of these types can contain executable AML code within the
340 * declaration.
341 */
342 switch (type) {
343 case ACPI_TYPE_REGION:
344
345 info->op_region_init++;
346 status = acpi_ds_get_region_arguments(obj_desc);
347 break;
348
349 case ACPI_TYPE_BUFFER_FIELD:
350
351 info->field_init++;
352 status = acpi_ds_get_buffer_field_arguments(obj_desc);
353 break;
354
355 case ACPI_TYPE_LOCAL_BANK_FIELD:
356
357 info->field_init++;
358 status = acpi_ds_get_bank_field_arguments(obj_desc);
359 break;
360
361 case ACPI_TYPE_BUFFER:
362
363 info->buffer_init++;
364 status = acpi_ds_get_buffer_arguments(obj_desc);
365 break;
366
367 case ACPI_TYPE_PACKAGE:
368
369 info->package_init++;
370 status = acpi_ds_get_package_arguments(obj_desc);
371 break;
372
373 default:
374
375 /* No other types can get here */
376
377 break;
378 }
379
380 if (ACPI_FAILURE(status)) {
381 ACPI_EXCEPTION((AE_INFO, status,
382 "Could not execute arguments for [%4.4s] (%s)",
383 acpi_ut_get_node_name(node),
384 acpi_ut_get_type_name(type)));
385 }
386
387 /*
388 * We ignore errors from above, and always return OK, since we don't want
389 * to abort the walk on any single error.
390 */
391 acpi_ex_exit_interpreter();
392 return (AE_OK);
393}
394
395/*******************************************************************************
396 *
397 * FUNCTION: acpi_ns_find_ini_methods
398 *
399 * PARAMETERS: acpi_walk_callback
400 *
401 * RETURN: acpi_status
402 *
403 * DESCRIPTION: Called during namespace walk. Finds objects named _INI under
404 * device/processor/thermal objects, and marks the entire subtree
405 * with a SUBTREE_HAS_INI flag. This flag is used during the
406 * subsequent device initialization walk to avoid entire subtrees
407 * that do not contain an _INI.
408 *
409 ******************************************************************************/
410
411static acpi_status
412acpi_ns_find_ini_methods(acpi_handle obj_handle,
413 u32 nesting_level, void *context, void **return_value)
414{
415 struct acpi_device_walk_info *info =
416 ACPI_CAST_PTR(struct acpi_device_walk_info, context);
417 struct acpi_namespace_node *node;
418 struct acpi_namespace_node *parent_node;
419
420 /* Keep count of device/processor/thermal objects */
421
422 node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_handle);
423 if ((node->type == ACPI_TYPE_DEVICE) ||
424 (node->type == ACPI_TYPE_PROCESSOR) ||
425 (node->type == ACPI_TYPE_THERMAL)) {
426 info->device_count++;
427 return (AE_OK);
428 }
429
430 /* We are only looking for methods named _INI */
431
432 if (!ACPI_COMPARE_NAME(node->name.ascii, METHOD_NAME__INI)) {
433 return (AE_OK);
434 }
435
436 /*
437 * The only _INI methods that we care about are those that are
438 * present under Device, Processor, and Thermal objects.
439 */
440 parent_node = node->parent;
441 switch (parent_node->type) {
442 case ACPI_TYPE_DEVICE:
443 case ACPI_TYPE_PROCESSOR:
444 case ACPI_TYPE_THERMAL:
445
446 /* Mark parent and bubble up the INI present flag to the root */
447
448 while (parent_node) {
449 parent_node->flags |= ANOBJ_SUBTREE_HAS_INI;
450 parent_node = parent_node->parent;
451 }
452 break;
453
454 default:
455
456 break;
457 }
458
459 return (AE_OK);
460}
461
462/*******************************************************************************
463 *
464 * FUNCTION: acpi_ns_init_one_device
465 *
466 * PARAMETERS: acpi_walk_callback
467 *
468 * RETURN: acpi_status
469 *
470 * DESCRIPTION: This is called once per device soon after ACPI is enabled
471 * to initialize each device. It determines if the device is
472 * present, and if so, calls _INI.
473 *
474 ******************************************************************************/
475
476static acpi_status
477acpi_ns_init_one_device(acpi_handle obj_handle,
478 u32 nesting_level, void *context, void **return_value)
479{
480 struct acpi_device_walk_info *walk_info =
481 ACPI_CAST_PTR(struct acpi_device_walk_info, context);
482 struct acpi_evaluate_info *info = walk_info->evaluate_info;
483 u32 flags;
484 acpi_status status;
485 struct acpi_namespace_node *device_node;
486
487 ACPI_FUNCTION_TRACE(ns_init_one_device);
488
489 /* We are interested in Devices, Processors and thermal_zones only */
490
491 device_node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_handle);
492 if ((device_node->type != ACPI_TYPE_DEVICE) &&
493 (device_node->type != ACPI_TYPE_PROCESSOR) &&
494 (device_node->type != ACPI_TYPE_THERMAL)) {
495 return_ACPI_STATUS(AE_OK);
496 }
497
498 /*
499 * Because of an earlier namespace analysis, all subtrees that contain an
500 * _INI method are tagged.
501 *
502 * If this device subtree does not contain any _INI methods, we
503 * can exit now and stop traversing this entire subtree.
504 */
505 if (!(device_node->flags & ANOBJ_SUBTREE_HAS_INI)) {
506 return_ACPI_STATUS(AE_CTRL_DEPTH);
507 }
508
509 /*
510 * Run _STA to determine if this device is present and functioning. We
511 * must know this information for two important reasons (from ACPI spec):
512 *
513 * 1) We can only run _INI if the device is present.
514 * 2) We must abort the device tree walk on this subtree if the device is
515 * not present and is not functional (we will not examine the children)
516 *
517 * The _STA method is not required to be present under the device, we
518 * assume the device is present if _STA does not exist.
519 */
520 ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname
521 (ACPI_TYPE_METHOD, device_node, METHOD_NAME__STA));
522
523 status = acpi_ut_execute_STA(device_node, &flags);
524 if (ACPI_FAILURE(status)) {
525
526 /* Ignore error and move on to next device */
527
528 return_ACPI_STATUS(AE_OK);
529 }
530
531 /*
532 * Flags == -1 means that _STA was not found. In this case, we assume that
533 * the device is both present and functional.
534 *
535 * From the ACPI spec, description of _STA:
536 *
537 * "If a device object (including the processor object) does not have an
538 * _STA object, then OSPM assumes that all of the above bits are set (in
539 * other words, the device is present, ..., and functioning)"
540 */
541 if (flags != ACPI_UINT32_MAX) {
542 walk_info->num_STA++;
543 }
544
545 /*
546 * Examine the PRESENT and FUNCTIONING status bits
547 *
548 * Note: ACPI spec does not seem to specify behavior for the present but
549 * not functioning case, so we assume functioning if present.
550 */
551 if (!(flags & ACPI_STA_DEVICE_PRESENT)) {
552
553 /* Device is not present, we must examine the Functioning bit */
554
555 if (flags & ACPI_STA_DEVICE_FUNCTIONING) {
556 /*
557 * Device is not present but is "functioning". In this case,
558 * we will not run _INI, but we continue to examine the children
559 * of this device.
560 *
561 * From the ACPI spec, description of _STA: (note - no mention
562 * of whether to run _INI or not on the device in question)
563 *
564 * "_STA may return bit 0 clear (not present) with bit 3 set
565 * (device is functional). This case is used to indicate a valid
566 * device for which no device driver should be loaded (for example,
567 * a bridge device.) Children of this device may be present and
568 * valid. OSPM should continue enumeration below a device whose
569 * _STA returns this bit combination"
570 */
571 return_ACPI_STATUS(AE_OK);
572 } else {
573 /*
574 * Device is not present and is not functioning. We must abort the
575 * walk of this subtree immediately -- don't look at the children
576 * of such a device.
577 *
578 * From the ACPI spec, description of _INI:
579 *
580 * "If the _STA method indicates that the device is not present,
581 * OSPM will not run the _INI and will not examine the children
582 * of the device for _INI methods"
583 */
584 return_ACPI_STATUS(AE_CTRL_DEPTH);
585 }
586 }
587
588 /*
589 * The device is present or is assumed present if no _STA exists.
590 * Run the _INI if it exists (not required to exist)
591 *
592 * Note: We know there is an _INI within this subtree, but it may not be
593 * under this particular device, it may be lower in the branch.
594 */
595 ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname
596 (ACPI_TYPE_METHOD, device_node, METHOD_NAME__INI));
597
598 memset(info, 0, sizeof(struct acpi_evaluate_info));
599 info->prefix_node = device_node;
600 info->relative_pathname = METHOD_NAME__INI;
601 info->parameters = NULL;
602 info->flags = ACPI_IGNORE_RETURN_VALUE;
603
604 status = acpi_ns_evaluate(info);
605
606 if (ACPI_SUCCESS(status)) {
607 walk_info->num_INI++;
608 }
609#ifdef ACPI_DEBUG_OUTPUT
610 else if (status != AE_NOT_FOUND) {
611
612 /* Ignore error and move on to next device */
613
614 char *scope_name =
615 acpi_ns_get_normalized_pathname(device_node, TRUE);
616
617 ACPI_EXCEPTION((AE_INFO, status, "during %s._INI execution",
618 scope_name));
619 ACPI_FREE(scope_name);
620 }
621#endif
622
623 /* Ignore errors from above */
624
625 status = AE_OK;
626
627 /*
628 * The _INI method has been run if present; call the Global Initialization
629 * Handler for this device.
630 */
631 if (acpi_gbl_init_handler) {
632 status =
633 acpi_gbl_init_handler(device_node, ACPI_INIT_DEVICE_INI);
634 }
635
636 return_ACPI_STATUS(status);
637}