1 /******************************************************************************
2 *
3 * Module Name: nsinit - namespace initialization
4 *
5 *****************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2013, 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
45 #define __NSXFINIT_C__
46
47 #include "acpi.h"
48 #include "accommon.h"
49 #include "acnamesp.h"
50 #include "acdispat.h"
51 #include "acinterp.h"
52
53 #define _COMPONENT ACPI_NAMESPACE
54 ACPI_MODULE_NAME ("nsinit")
55
56 /* Local prototypes */
57
58 static ACPI_STATUS
59 AcpiNsInitOneObject (
60 ACPI_HANDLE ObjHandle,
61 UINT32 Level,
62 void *Context,
63 void **ReturnValue);
64
65 static ACPI_STATUS
66 AcpiNsInitOneDevice (
67 ACPI_HANDLE ObjHandle,
68 UINT32 NestingLevel,
69 void *Context,
70 void **ReturnValue);
71
72 static ACPI_STATUS
73 AcpiNsFindIniMethods (
74 ACPI_HANDLE ObjHandle,
75 UINT32 NestingLevel,
76 void *Context,
77 void **ReturnValue);
78
79
80 /*******************************************************************************
81 *
82 * FUNCTION: AcpiNsInitializeObjects
83 *
84 * PARAMETERS: None
85 *
86 * RETURN: Status
87 *
88 * DESCRIPTION: Walk the entire namespace and perform any necessary
89 * initialization on the objects found therein
90 *
91 ******************************************************************************/
92
93 ACPI_STATUS
94 AcpiNsInitializeObjects (
95 void)
96 {
97 ACPI_STATUS Status;
98 ACPI_INIT_WALK_INFO Info;
99
100
101 ACPI_FUNCTION_TRACE (NsInitializeObjects);
102
103
104 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
105 "**** Starting initialization of namespace objects ****\n"));
106 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
107 "Completing Region/Field/Buffer/Package initialization:\n"));
108
109 /* Set all init info to zero */
110
111 ACPI_MEMSET (&Info, 0, sizeof (ACPI_INIT_WALK_INFO));
112
113 /* Walk entire namespace from the supplied root */
114
115 Status = AcpiWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
116 ACPI_UINT32_MAX, AcpiNsInitOneObject, NULL,
117 &Info, NULL);
118 if (ACPI_FAILURE (Status))
119 {
120 ACPI_EXCEPTION ((AE_INFO, Status, "During WalkNamespace"));
121 }
122
123 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
124 " Initialized %u/%u Regions %u/%u Fields %u/%u "
125 "Buffers %u/%u Packages (%u nodes)\n",
126 Info.OpRegionInit, Info.OpRegionCount,
127 Info.FieldInit, Info.FieldCount,
128 Info.BufferInit, Info.BufferCount,
129 Info.PackageInit, Info.PackageCount, Info.ObjectCount));
130
131 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
132 "%u Control Methods found\n", Info.MethodCount));
133 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
134 "%u Op Regions found\n", Info.OpRegionCount));
135
136 return_ACPI_STATUS (AE_OK);
137 }
138
139
140 /*******************************************************************************
141 *
142 * FUNCTION: AcpiNsInitializeDevices
143 *
144 * PARAMETERS: None
145 *
146 * RETURN: ACPI_STATUS
147 *
148 * DESCRIPTION: Walk the entire namespace and initialize all ACPI devices.
149 * This means running _INI on all present devices.
150 *
151 * Note: We install PCI config space handler on region access,
152 * not here.
153 *
154 ******************************************************************************/
155
156 ACPI_STATUS
157 AcpiNsInitializeDevices (
158 void)
159 {
160 ACPI_STATUS Status;
161 ACPI_DEVICE_WALK_INFO Info;
162
163
164 ACPI_FUNCTION_TRACE (NsInitializeDevices);
165
166
167 /* Init counters */
168
169 Info.DeviceCount = 0;
170 Info.Num_STA = 0;
171 Info.Num_INI = 0;
172
173 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
174 "Initializing Device/Processor/Thermal objects "
175 "and executing _INI/_STA methods:\n"));
176
177 /* Tree analysis: find all subtrees that contain _INI methods */
178
179 Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
180 ACPI_UINT32_MAX, FALSE, AcpiNsFindIniMethods, NULL, &Info, NULL);
181 if (ACPI_FAILURE (Status))
182 {
183 goto ErrorExit;
184 }
185
186 /* Allocate the evaluation information block */
187
188 Info.EvaluateInfo = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO));
189 if (!Info.EvaluateInfo)
190 {
191 Status = AE_NO_MEMORY;
192 goto ErrorExit;
193 }
194
195 /*
196 * Execute the "global" _INI method that may appear at the root. This
197 * support is provided for Windows compatibility (Vista+) and is not
198 * part of the ACPI specification.
199 */
200 Info.EvaluateInfo->PrefixNode = AcpiGbl_RootNode;
201 Info.EvaluateInfo->RelativePathname = METHOD_NAME__INI;
202 Info.EvaluateInfo->Parameters = NULL;
203 Info.EvaluateInfo->Flags = ACPI_IGNORE_RETURN_VALUE;
204
205 Status = AcpiNsEvaluate (Info.EvaluateInfo);
206 if (ACPI_SUCCESS (Status))
207 {
208 Info.Num_INI++;
209 }
210
211 /* Walk namespace to execute all _INIs on present devices */
212
213 Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
214 ACPI_UINT32_MAX, FALSE, AcpiNsInitOneDevice, NULL, &Info, NULL);
215
216 /*
217 * Any _OSI requests should be completed by now. If the BIOS has
218 * requested any Windows OSI strings, we will always truncate
219 * I/O addresses to 16 bits -- for Windows compatibility.
220 */
221 if (AcpiGbl_OsiData >= ACPI_OSI_WIN_2000)
222 {
223 AcpiGbl_TruncateIoAddresses = TRUE;
224 }
225
226 ACPI_FREE (Info.EvaluateInfo);
227 if (ACPI_FAILURE (Status))
228 {
229 goto ErrorExit;
230 }
231
232 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
233 " Executed %u _INI methods requiring %u _STA executions "
234 "(examined %u objects)\n",
235 Info.Num_INI, Info.Num_STA, Info.DeviceCount));
236
237 return_ACPI_STATUS (Status);
238
239
240 ErrorExit:
241 ACPI_EXCEPTION ((AE_INFO, Status, "During device initialization"));
242 return_ACPI_STATUS (Status);
243 }
244
245
246 /*******************************************************************************
247 *
248 * FUNCTION: AcpiNsInitOneObject
249 *
250 * PARAMETERS: ObjHandle - Node
251 * Level - Current nesting level
252 * Context - Points to a init info struct
253 * ReturnValue - Not used
254 *
255 * RETURN: Status
256 *
257 * DESCRIPTION: Callback from AcpiWalkNamespace. Invoked for every object
258 * within the namespace.
259 *
260 * Currently, the only objects that require initialization are:
261 * 1) Methods
262 * 2) Op Regions
263 *
264 ******************************************************************************/
265
266 static ACPI_STATUS
267 AcpiNsInitOneObject (
268 ACPI_HANDLE ObjHandle,
269 UINT32 Level,
270 void *Context,
271 void **ReturnValue)
272 {
273 ACPI_OBJECT_TYPE Type;
274 ACPI_STATUS Status = AE_OK;
275 ACPI_INIT_WALK_INFO *Info = (ACPI_INIT_WALK_INFO *) Context;
276 ACPI_NAMESPACE_NODE *Node = (ACPI_NAMESPACE_NODE *) ObjHandle;
277 ACPI_OPERAND_OBJECT *ObjDesc;
278
279
280 ACPI_FUNCTION_NAME (NsInitOneObject);
281
282
283 Info->ObjectCount++;
284
285 /* And even then, we are only interested in a few object types */
286
287 Type = AcpiNsGetType (ObjHandle);
288 ObjDesc = AcpiNsGetAttachedObject (Node);
289 if (!ObjDesc)
290 {
291 return (AE_OK);
292 }
293
294 /* Increment counters for object types we are looking for */
295
296 switch (Type)
297 {
298 case ACPI_TYPE_REGION:
299
300 Info->OpRegionCount++;
301 break;
302
303 case ACPI_TYPE_BUFFER_FIELD:
304
305 Info->FieldCount++;
306 break;
307
308 case ACPI_TYPE_LOCAL_BANK_FIELD:
309
310 Info->FieldCount++;
311 break;
312
313 case ACPI_TYPE_BUFFER:
314
315 Info->BufferCount++;
316 break;
317
318 case ACPI_TYPE_PACKAGE:
319
320 Info->PackageCount++;
321 break;
322
323 default:
324
325 /* No init required, just exit now */
326
327 return (AE_OK);
328 }
329
330 /* If the object is already initialized, nothing else to do */
331
332 if (ObjDesc->Common.Flags & AOPOBJ_DATA_VALID)
333 {
334 return (AE_OK);
335 }
336
337 /* Must lock the interpreter before executing AML code */
338
339 AcpiExEnterInterpreter ();
340
341 /*
342 * Each of these types can contain executable AML code within the
343 * declaration.
344 */
345 switch (Type)
346 {
347 case ACPI_TYPE_REGION:
348
349 Info->OpRegionInit++;
350 Status = AcpiDsGetRegionArguments (ObjDesc);
351 break;
352
353 case ACPI_TYPE_BUFFER_FIELD:
354
355 Info->FieldInit++;
356 Status = AcpiDsGetBufferFieldArguments (ObjDesc);
357 break;
358
359 case ACPI_TYPE_LOCAL_BANK_FIELD:
360
361 Info->FieldInit++;
362 Status = AcpiDsGetBankFieldArguments (ObjDesc);
363 break;
364
365 case ACPI_TYPE_BUFFER:
366
367 Info->BufferInit++;
368 Status = AcpiDsGetBufferArguments (ObjDesc);
369 break;
370
371 case ACPI_TYPE_PACKAGE:
372
373 Info->PackageInit++;
374 Status = AcpiDsGetPackageArguments (ObjDesc);
375 break;
376
377 default:
378
379 /* No other types can get here */
380
381 break;
382 }
383
384 if (ACPI_FAILURE (Status))
385 {
386 ACPI_EXCEPTION ((AE_INFO, Status,
387 "Could not execute arguments for [%4.4s] (%s)",
388 AcpiUtGetNodeName (Node), AcpiUtGetTypeName (Type)));
389 }
390
391 /*
392 * We ignore errors from above, and always return OK, since we don't want
393 * to abort the walk on any single error.
394 */
395 AcpiExExitInterpreter ();
396 return (AE_OK);
397 }
398
399
400 /*******************************************************************************
401 *
402 * FUNCTION: AcpiNsFindIniMethods
403 *
404 * PARAMETERS: ACPI_WALK_CALLBACK
405 *
406 * RETURN: ACPI_STATUS
407 *
408 * DESCRIPTION: Called during namespace walk. Finds objects named _INI under
409 * device/processor/thermal objects, and marks the entire subtree
410 * with a SUBTREE_HAS_INI flag. This flag is used during the
411 * subsequent device initialization walk to avoid entire subtrees
412 * that do not contain an _INI.
413 *
414 ******************************************************************************/
415
416 static ACPI_STATUS
417 AcpiNsFindIniMethods (
418 ACPI_HANDLE ObjHandle,
419 UINT32 NestingLevel,
420 void *Context,
421 void **ReturnValue)
422 {
423 ACPI_DEVICE_WALK_INFO *Info = ACPI_CAST_PTR (ACPI_DEVICE_WALK_INFO, Context);
424 ACPI_NAMESPACE_NODE *Node;
425 ACPI_NAMESPACE_NODE *ParentNode;
426
427
428 /* Keep count of device/processor/thermal objects */
429
430 Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjHandle);
431 if ((Node->Type == ACPI_TYPE_DEVICE) ||
432 (Node->Type == ACPI_TYPE_PROCESSOR) ||
433 (Node->Type == ACPI_TYPE_THERMAL))
434 {
435 Info->DeviceCount++;
436 return (AE_OK);
437 }
438
439 /* We are only looking for methods named _INI */
440
441 if (!ACPI_COMPARE_NAME (Node->Name.Ascii, METHOD_NAME__INI))
442 {
443 return (AE_OK);
444 }
445
446 /*
447 * The only _INI methods that we care about are those that are
448 * present under Device, Processor, and Thermal objects.
449 */
450 ParentNode = Node->Parent;
451 switch (ParentNode->Type)
452 {
453 case ACPI_TYPE_DEVICE:
454 case ACPI_TYPE_PROCESSOR:
455 case ACPI_TYPE_THERMAL:
456
457 /* Mark parent and bubble up the INI present flag to the root */
458
459 while (ParentNode)
460 {
461 ParentNode->Flags |= ANOBJ_SUBTREE_HAS_INI;
462 ParentNode = ParentNode->Parent;
463 }
464 break;
465
466 default:
467
468 break;
469 }
470
471 return (AE_OK);
472 }
473
474
475 /*******************************************************************************
476 *
477 * FUNCTION: AcpiNsInitOneDevice
478 *
479 * PARAMETERS: ACPI_WALK_CALLBACK
480 *
481 * RETURN: ACPI_STATUS
482 *
483 * DESCRIPTION: This is called once per device soon after ACPI is enabled
484 * to initialize each device. It determines if the device is
485 * present, and if so, calls _INI.
486 *
487 ******************************************************************************/
488
489 static ACPI_STATUS
490 AcpiNsInitOneDevice (
491 ACPI_HANDLE ObjHandle,
492 UINT32 NestingLevel,
493 void *Context,
494 void **ReturnValue)
495 {
496 ACPI_DEVICE_WALK_INFO *WalkInfo = ACPI_CAST_PTR (ACPI_DEVICE_WALK_INFO, Context);
497 ACPI_EVALUATE_INFO *Info = WalkInfo->EvaluateInfo;
498 UINT32 Flags;
499 ACPI_STATUS Status;
500 ACPI_NAMESPACE_NODE *DeviceNode;
501
502
503 ACPI_FUNCTION_TRACE (NsInitOneDevice);
504
505
506 /* We are interested in Devices, Processors and ThermalZones only */
507
508 DeviceNode = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjHandle);
509 if ((DeviceNode->Type != ACPI_TYPE_DEVICE) &&
510 (DeviceNode->Type != ACPI_TYPE_PROCESSOR) &&
511 (DeviceNode->Type != ACPI_TYPE_THERMAL))
512 {
513 return_ACPI_STATUS (AE_OK);
514 }
515
516 /*
517 * Because of an earlier namespace analysis, all subtrees that contain an
518 * _INI method are tagged.
519 *
520 * If this device subtree does not contain any _INI methods, we
521 * can exit now and stop traversing this entire subtree.
522 */
523 if (!(DeviceNode->Flags & ANOBJ_SUBTREE_HAS_INI))
524 {
525 return_ACPI_STATUS (AE_CTRL_DEPTH);
526 }
527
528 /*
529 * Run _STA to determine if this device is present and functioning. We
530 * must know this information for two important reasons (from ACPI spec):
531 *
532 * 1) We can only run _INI if the device is present.
533 * 2) We must abort the device tree walk on this subtree if the device is
534 * not present and is not functional (we will not examine the children)
535 *
536 * The _STA method is not required to be present under the device, we
537 * assume the device is present if _STA does not exist.
538 */
539 ACPI_DEBUG_EXEC (AcpiUtDisplayInitPathname (
540 ACPI_TYPE_METHOD, DeviceNode, METHOD_NAME__STA));
541
542 Status = AcpiUtExecute_STA (DeviceNode, &Flags);
543 if (ACPI_FAILURE (Status))
544 {
545 /* Ignore error and move on to next device */
546
547 return_ACPI_STATUS (AE_OK);
548 }
549
550 /*
551 * Flags == -1 means that _STA was not found. In this case, we assume that
552 * the device is both present and functional.
553 *
554 * From the ACPI spec, description of _STA:
555 *
556 * "If a device object (including the processor object) does not have an
557 * _STA object, then OSPM assumes that all of the above bits are set (in
558 * other words, the device is present, ..., and functioning)"
559 */
560 if (Flags != ACPI_UINT32_MAX)
561 {
562 WalkInfo->Num_STA++;
563 }
564
565 /*
566 * Examine the PRESENT and FUNCTIONING status bits
567 *
568 * Note: ACPI spec does not seem to specify behavior for the present but
569 * not functioning case, so we assume functioning if present.
570 */
571 if (!(Flags & ACPI_STA_DEVICE_PRESENT))
572 {
573 /* Device is not present, we must examine the Functioning bit */
574
575 if (Flags & ACPI_STA_DEVICE_FUNCTIONING)
576 {
577 /*
578 * Device is not present but is "functioning". In this case,
579 * we will not run _INI, but we continue to examine the children
580 * of this device.
581 *
582 * From the ACPI spec, description of _STA: (Note - no mention
583 * of whether to run _INI or not on the device in question)
584 *
585 * "_STA may return bit 0 clear (not present) with bit 3 set
586 * (device is functional). This case is used to indicate a valid
587 * device for which no device driver should be loaded (for example,
588 * a bridge device.) Children of this device may be present and
589 * valid. OSPM should continue enumeration below a device whose
590 * _STA returns this bit combination"
591 */
592 return_ACPI_STATUS (AE_OK);
593 }
594 else
595 {
596 /*
597 * Device is not present and is not functioning. We must abort the
598 * walk of this subtree immediately -- don't look at the children
599 * of such a device.
600 *
601 * From the ACPI spec, description of _INI:
602 *
603 * "If the _STA method indicates that the device is not present,
604 * OSPM will not run the _INI and will not examine the children
605 * of the device for _INI methods"
606 */
607 return_ACPI_STATUS (AE_CTRL_DEPTH);
608 }
609 }
610
611 /*
612 * The device is present or is assumed present if no _STA exists.
613 * Run the _INI if it exists (not required to exist)
614 *
615 * Note: We know there is an _INI within this subtree, but it may not be
616 * under this particular device, it may be lower in the branch.
617 */
618 ACPI_DEBUG_EXEC (AcpiUtDisplayInitPathname (
619 ACPI_TYPE_METHOD, DeviceNode, METHOD_NAME__INI));
620
621 ACPI_MEMSET (Info, 0, sizeof (ACPI_EVALUATE_INFO));
622 Info->PrefixNode = DeviceNode;
623 Info->RelativePathname = METHOD_NAME__INI;
624 Info->Parameters = NULL;
625 Info->Flags = ACPI_IGNORE_RETURN_VALUE;
626
627 Status = AcpiNsEvaluate (Info);
628 if (ACPI_SUCCESS (Status))
629 {
630 WalkInfo->Num_INI++;
631 }
632
633 #ifdef ACPI_DEBUG_OUTPUT
634 else if (Status != AE_NOT_FOUND)
635 {
636 /* Ignore error and move on to next device */
637
638 char *ScopeName = AcpiNsGetExternalPathname (Info->Node);
639
640 ACPI_EXCEPTION ((AE_INFO, Status, "during %s._INI execution",
641 ScopeName));
642 ACPI_FREE (ScopeName);
643 }
644 #endif
645
646 /* Ignore errors from above */
647
648 Status = AE_OK;
649
650 /*
651 * The _INI method has been run if present; call the Global Initialization
652 * Handler for this device.
653 */
654 if (AcpiGbl_InitHandler)
655 {
656 Status = AcpiGbl_InitHandler (DeviceNode, ACPI_INIT_DEVICE_INI);
657 }
658
659 return_ACPI_STATUS (Status);
660 }