1 /******************************************************************************
2 *
3 * Module Name: nsinit - namespace initialization
4 *
5 *****************************************************************************/
6
7 /******************************************************************************
8 *
9 * 1. Copyright Notice
10 *
11 * Some or all of this work - Copyright (c) 1999 - 2018, Intel Corp.
12 * All rights reserved.
13 *
14 * 2. License
15 *
16 * 2.1. This is your license from Intel Corp. under its intellectual property
17 * rights. You may have additional license terms from the party that provided
18 * you this software, covering your right to use that party's intellectual
19 * property rights.
20 *
21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
22 * copy of the source code appearing in this file ("Covered Code") an
23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the
24 * base code distributed originally by Intel ("Original Intel Code") to copy,
25 * make derivatives, distribute, use and display any portion of the Covered
26 * Code in any form, with the right to sublicense such rights; and
27 *
28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
29 * license (with the right to sublicense), under only those claims of Intel
30 * patents that are infringed by the Original Intel Code, to make, use, sell,
31 * offer to sell, and import the Covered Code and derivative works thereof
32 * solely to the minimum extent necessary to exercise the above copyright
33 * license, and in no event shall the patent license extend to any additions
34 * to or modifications of the Original Intel Code. No other license or right
35 * is granted directly or by implication, estoppel or otherwise;
36 *
37 * The above copyright and patent license is granted only if the following
38 * conditions are met:
39 *
40 * 3. Conditions
41 *
42 * 3.1. Redistribution of Source with Rights to Further Distribute Source.
43 * Redistribution of source code of any substantial portion of the Covered
44 * Code or modification with rights to further distribute source must include
45 * the above Copyright Notice, the above License, this list of Conditions,
46 * and the following Disclaimer and Export Compliance provision. In addition,
47 * Licensee must cause all Covered Code to which Licensee contributes to
48 * contain a file documenting the changes Licensee made to create that Covered
49 * Code and the date of any change. Licensee must include in that file the
50 * documentation of any changes made by any predecessor Licensee. Licensee
51 * must include a prominent statement that the modification is derived,
52 * directly or indirectly, from Original Intel Code.
53 *
54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
55 * Redistribution of source code of any substantial portion of the Covered
56 * Code or modification without rights to further distribute source must
57 * include the following Disclaimer and Export Compliance provision in the
58 * documentation and/or other materials provided with distribution. In
59 * addition, Licensee may not authorize further sublicense of source of any
60 * portion of the Covered Code, and must include terms to the effect that the
61 * license from Licensee to its licensee is limited to the intellectual
62 * property embodied in the software Licensee provides to its licensee, and
63 * not to intellectual property embodied in modifications its licensee may
64 * make.
65 *
66 * 3.3. Redistribution of Executable. Redistribution in executable form of any
67 * substantial portion of the Covered Code or modification must reproduce the
68 * above Copyright Notice, and the following Disclaimer and Export Compliance
69 * provision in the documentation and/or other materials provided with the
70 * distribution.
71 *
72 * 3.4. Intel retains all right, title, and interest in and to the Original
73 * Intel Code.
74 *
75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by
76 * Intel shall be used in advertising or otherwise to promote the sale, use or
77 * other dealings in products derived from or relating to the Covered Code
78 * without prior written authorization from Intel.
79 *
80 * 4. Disclaimer and Export Compliance
81 *
82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
88 * PARTICULAR PURPOSE.
89 *
90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
97 * LIMITED REMEDY.
98 *
99 * 4.3. Licensee shall not export, either directly or indirectly, any of this
100 * software or system incorporating such software without first obtaining any
101 * required license or other approval from the U. S. Department of Commerce or
102 * any other agency or department of the United States Government. In the
103 * event Licensee exports any such software from the United States or
104 * re-exports any such software from a foreign destination, Licensee shall
105 * ensure that the distribution and export/re-export of the software is in
106 * compliance with all laws, regulations, orders, or other restrictions of the
107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor
108 * any of its subsidiaries will export/re-export any technical data, process,
109 * software, or service, directly or indirectly, to any country for which the
110 * United States government or any agency thereof requires an export license,
111 * other governmental approval, or letter of assurance, without first obtaining
112 * such license, approval or letter.
113 *
114 *****************************************************************************
115 *
116 * Alternatively, you may choose to be licensed under the terms of the
117 * following license:
118 *
119 * Redistribution and use in source and binary forms, with or without
120 * modification, are permitted provided that the following conditions
121 * are met:
122 * 1. Redistributions of source code must retain the above copyright
123 * notice, this list of conditions, and the following disclaimer,
124 * without modification.
125 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
126 * substantially similar to the "NO WARRANTY" disclaimer below
127 * ("Disclaimer") and any redistribution must be conditioned upon
128 * including a substantially similar Disclaimer requirement for further
129 * binary redistribution.
130 * 3. Neither the names of the above-listed copyright holders nor the names
131 * of any contributors may be used to endorse or promote products derived
132 * from this software without specific prior written permission.
133 *
134 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
135 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
136 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
137 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
138 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
139 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
140 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
141 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
142 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
143 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
144 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
145 *
146 * Alternatively, you may choose to be licensed under the terms of the
147 * GNU General Public License ("GPL") version 2 as published by the Free
148 * Software Foundation.
149 *
150 *****************************************************************************/
151
152 #include "acpi.h"
153 #include "accommon.h"
154 #include "acnamesp.h"
155 #include "acdispat.h"
156 #include "acinterp.h"
157 #include "acevents.h"
158
159 #define _COMPONENT ACPI_NAMESPACE
160 ACPI_MODULE_NAME ("nsinit")
161
162 /* Local prototypes */
163
164 static ACPI_STATUS
165 AcpiNsInitOneObject (
166 ACPI_HANDLE ObjHandle,
167 UINT32 Level,
168 void *Context,
169 void **ReturnValue);
170
171 static ACPI_STATUS
172 AcpiNsInitOneDevice (
173 ACPI_HANDLE ObjHandle,
174 UINT32 NestingLevel,
175 void *Context,
176 void **ReturnValue);
177
178 static ACPI_STATUS
179 AcpiNsFindIniMethods (
180 ACPI_HANDLE ObjHandle,
181 UINT32 NestingLevel,
182 void *Context,
183 void **ReturnValue);
184
185
186 /*******************************************************************************
187 *
188 * FUNCTION: AcpiNsInitializeObjects
189 *
190 * PARAMETERS: None
191 *
192 * RETURN: Status
193 *
194 * DESCRIPTION: Walk the entire namespace and perform any necessary
195 * initialization on the objects found therein
196 *
197 ******************************************************************************/
198
199 ACPI_STATUS
AcpiNsInitializeObjects(void)200 AcpiNsInitializeObjects (
201 void)
202 {
203 ACPI_STATUS Status;
204 ACPI_INIT_WALK_INFO Info;
205
206
207 ACPI_FUNCTION_TRACE (NsInitializeObjects);
208
209
210 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
211 "[Init] Completing Initialization of ACPI Objects\n"));
212 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
213 "**** Starting initialization of namespace objects ****\n"));
214 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
215 "Completing Region/Field/Buffer/Package initialization:\n"));
216
217 /* Set all init info to zero */
218
219 memset (&Info, 0, sizeof (ACPI_INIT_WALK_INFO));
220
221 /* Walk entire namespace from the supplied root */
222
223 Status = AcpiWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
224 ACPI_UINT32_MAX, AcpiNsInitOneObject, NULL,
225 &Info, NULL);
226 if (ACPI_FAILURE (Status))
227 {
228 ACPI_EXCEPTION ((AE_INFO, Status, "During WalkNamespace"));
229 }
230
231 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
232 " Initialized %u/%u Regions %u/%u Fields %u/%u "
233 "Buffers %u/%u Packages (%u nodes)\n",
234 Info.OpRegionInit, Info.OpRegionCount,
235 Info.FieldInit, Info.FieldCount,
236 Info.BufferInit, Info.BufferCount,
237 Info.PackageInit, Info.PackageCount, Info.ObjectCount));
238
239 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
240 "%u Control Methods found\n%u Op Regions found\n",
241 Info.MethodCount, Info.OpRegionCount));
242
243 return_ACPI_STATUS (AE_OK);
244 }
245
246
247 /*******************************************************************************
248 *
249 * FUNCTION: AcpiNsInitializeDevices
250 *
251 * PARAMETERS: None
252 *
253 * RETURN: ACPI_STATUS
254 *
255 * DESCRIPTION: Walk the entire namespace and initialize all ACPI devices.
256 * This means running _INI on all present devices.
257 *
258 * Note: We install PCI config space handler on region access,
259 * not here.
260 *
261 ******************************************************************************/
262
263 ACPI_STATUS
AcpiNsInitializeDevices(UINT32 Flags)264 AcpiNsInitializeDevices (
265 UINT32 Flags)
266 {
267 ACPI_STATUS Status = AE_OK;
268 ACPI_DEVICE_WALK_INFO Info;
269 ACPI_HANDLE Handle;
270
271
272 ACPI_FUNCTION_TRACE (NsInitializeDevices);
273
274
275 if (!(Flags & ACPI_NO_DEVICE_INIT))
276 {
277 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
278 "[Init] Initializing ACPI Devices\n"));
279
280 /* Init counters */
281
282 Info.DeviceCount = 0;
283 Info.Num_STA = 0;
284 Info.Num_INI = 0;
285
286 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
287 "Initializing Device/Processor/Thermal objects "
288 "and executing _INI/_STA methods:\n"));
289
290 /* Tree analysis: find all subtrees that contain _INI methods */
291
292 Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
293 ACPI_UINT32_MAX, FALSE, AcpiNsFindIniMethods, NULL, &Info, NULL);
294 if (ACPI_FAILURE (Status))
295 {
296 goto ErrorExit;
297 }
298
299 /* Allocate the evaluation information block */
300
301 Info.EvaluateInfo = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO));
302 if (!Info.EvaluateInfo)
303 {
304 Status = AE_NO_MEMORY;
305 goto ErrorExit;
306 }
307
308 /*
309 * Execute the "global" _INI method that may appear at the root.
310 * This support is provided for Windows compatibility (Vista+) and
311 * is not part of the ACPI specification.
312 */
313 Info.EvaluateInfo->PrefixNode = AcpiGbl_RootNode;
314 Info.EvaluateInfo->RelativePathname = METHOD_NAME__INI;
315 Info.EvaluateInfo->Parameters = NULL;
316 Info.EvaluateInfo->Flags = ACPI_IGNORE_RETURN_VALUE;
317
318 Status = AcpiNsEvaluate (Info.EvaluateInfo);
319 if (ACPI_SUCCESS (Status))
320 {
321 Info.Num_INI++;
322 }
323
324 /*
325 * Execute \_SB._INI.
326 * There appears to be a strict order requirement for \_SB._INI,
327 * which should be evaluated before any _REG evaluations.
328 */
329 Status = AcpiGetHandle (NULL, "\\_SB", &Handle);
330 if (ACPI_SUCCESS (Status))
331 {
332 memset (Info.EvaluateInfo, 0, sizeof (ACPI_EVALUATE_INFO));
333 Info.EvaluateInfo->PrefixNode = Handle;
334 Info.EvaluateInfo->RelativePathname = METHOD_NAME__INI;
335 Info.EvaluateInfo->Parameters = NULL;
336 Info.EvaluateInfo->Flags = ACPI_IGNORE_RETURN_VALUE;
337
338 Status = AcpiNsEvaluate (Info.EvaluateInfo);
339 if (ACPI_SUCCESS (Status))
340 {
341 Info.Num_INI++;
342 }
343 }
344 }
345
346 /*
347 * Run all _REG methods
348 *
349 * Note: Any objects accessed by the _REG methods will be automatically
350 * initialized, even if they contain executable AML (see the call to
351 * AcpiNsInitializeObjects below).
352 *
353 * Note: According to the ACPI specification, we actually needn't execute
354 * _REG for SystemMemory/SystemIo operation regions, but for PCI_Config
355 * operation regions, it is required to evaluate _REG for those on a PCI
356 * root bus that doesn't contain _BBN object. So this code is kept here
357 * in order not to break things.
358 */
359 if (!(Flags & ACPI_NO_ADDRESS_SPACE_INIT))
360 {
361 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
362 "[Init] Executing _REG OpRegion methods\n"));
363
364 Status = AcpiEvInitializeOpRegions ();
365 if (ACPI_FAILURE (Status))
366 {
367 goto ErrorExit;
368 }
369 }
370
371 if (!(Flags & ACPI_NO_DEVICE_INIT))
372 {
373 /* Walk namespace to execute all _INIs on present devices */
374
375 Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
376 ACPI_UINT32_MAX, FALSE, AcpiNsInitOneDevice, NULL, &Info, NULL);
377
378 /*
379 * Any _OSI requests should be completed by now. If the BIOS has
380 * requested any Windows OSI strings, we will always truncate
381 * I/O addresses to 16 bits -- for Windows compatibility.
382 */
383 if (AcpiGbl_OsiData >= ACPI_OSI_WIN_2000)
384 {
385 AcpiGbl_TruncateIoAddresses = TRUE;
386 }
387
388 ACPI_FREE (Info.EvaluateInfo);
389 if (ACPI_FAILURE (Status))
390 {
391 goto ErrorExit;
392 }
393
394 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
395 " Executed %u _INI methods requiring %u _STA executions "
396 "(examined %u objects)\n",
397 Info.Num_INI, Info.Num_STA, Info.DeviceCount));
398 }
399
400 return_ACPI_STATUS (Status);
401
402
403 ErrorExit:
404 ACPI_EXCEPTION ((AE_INFO, Status, "During device initialization"));
405 return_ACPI_STATUS (Status);
406 }
407
408
409 /*******************************************************************************
410 *
411 * FUNCTION: AcpiNsInitOnePackage
412 *
413 * PARAMETERS: ObjHandle - Node
414 * Level - Current nesting level
415 * Context - Not used
416 * ReturnValue - Not used
417 *
418 * RETURN: Status
419 *
420 * DESCRIPTION: Callback from AcpiWalkNamespace. Invoked for every package
421 * within the namespace. Used during dynamic load of an SSDT.
422 *
423 ******************************************************************************/
424
425 ACPI_STATUS
AcpiNsInitOnePackage(ACPI_HANDLE ObjHandle,UINT32 Level,void * Context,void ** ReturnValue)426 AcpiNsInitOnePackage (
427 ACPI_HANDLE ObjHandle,
428 UINT32 Level,
429 void *Context,
430 void **ReturnValue)
431 {
432 ACPI_STATUS Status;
433 ACPI_OPERAND_OBJECT *ObjDesc;
434 ACPI_NAMESPACE_NODE *Node = (ACPI_NAMESPACE_NODE *) ObjHandle;
435
436
437 ObjDesc = AcpiNsGetAttachedObject (Node);
438 if (!ObjDesc)
439 {
440 return (AE_OK);
441 }
442
443 /* Exit if package is already initialized */
444
445 if (ObjDesc->Package.Flags & AOPOBJ_DATA_VALID)
446 {
447 return (AE_OK);
448 }
449
450 Status = AcpiDsGetPackageArguments (ObjDesc);
451 if (ACPI_FAILURE (Status))
452 {
453 return (AE_OK);
454 }
455
456 Status = AcpiUtWalkPackageTree (ObjDesc, NULL, AcpiDsInitPackageElement,
457 NULL);
458 if (ACPI_FAILURE (Status))
459 {
460 return (AE_OK);
461 }
462
463 ObjDesc->Package.Flags |= AOPOBJ_DATA_VALID;
464 return (AE_OK);
465 }
466
467
468 /*******************************************************************************
469 *
470 * FUNCTION: AcpiNsInitOneObject
471 *
472 * PARAMETERS: ObjHandle - Node
473 * Level - Current nesting level
474 * Context - Points to a init info struct
475 * ReturnValue - Not used
476 *
477 * RETURN: Status
478 *
479 * DESCRIPTION: Callback from AcpiWalkNamespace. Invoked for every object
480 * within the namespace.
481 *
482 * Currently, the only objects that require initialization are:
483 * 1) Methods
484 * 2) Op Regions
485 *
486 ******************************************************************************/
487
488 static ACPI_STATUS
AcpiNsInitOneObject(ACPI_HANDLE ObjHandle,UINT32 Level,void * Context,void ** ReturnValue)489 AcpiNsInitOneObject (
490 ACPI_HANDLE ObjHandle,
491 UINT32 Level,
492 void *Context,
493 void **ReturnValue)
494 {
495 ACPI_OBJECT_TYPE Type;
496 ACPI_STATUS Status = AE_OK;
497 ACPI_INIT_WALK_INFO *Info = (ACPI_INIT_WALK_INFO *) Context;
498 ACPI_NAMESPACE_NODE *Node = (ACPI_NAMESPACE_NODE *) ObjHandle;
499 ACPI_OPERAND_OBJECT *ObjDesc;
500
501
502 ACPI_FUNCTION_NAME (NsInitOneObject);
503
504
505 Info->ObjectCount++;
506
507 /* And even then, we are only interested in a few object types */
508
509 Type = AcpiNsGetType (ObjHandle);
510 ObjDesc = AcpiNsGetAttachedObject (Node);
511 if (!ObjDesc)
512 {
513 return (AE_OK);
514 }
515
516 /* Increment counters for object types we are looking for */
517
518 switch (Type)
519 {
520 case ACPI_TYPE_REGION:
521
522 Info->OpRegionCount++;
523 break;
524
525 case ACPI_TYPE_BUFFER_FIELD:
526
527 Info->FieldCount++;
528 break;
529
530 case ACPI_TYPE_LOCAL_BANK_FIELD:
531
532 Info->FieldCount++;
533 break;
534
535 case ACPI_TYPE_BUFFER:
536
537 Info->BufferCount++;
538 break;
539
540 case ACPI_TYPE_PACKAGE:
541
542 Info->PackageCount++;
543 break;
544
545 default:
546
547 /* No init required, just exit now */
548
549 return (AE_OK);
550 }
551
552 /* If the object is already initialized, nothing else to do */
553
554 if (ObjDesc->Common.Flags & AOPOBJ_DATA_VALID)
555 {
556 return (AE_OK);
557 }
558
559 /* Must lock the interpreter before executing AML code */
560
561 AcpiExEnterInterpreter ();
562
563 /*
564 * Each of these types can contain executable AML code within the
565 * declaration.
566 */
567 switch (Type)
568 {
569 case ACPI_TYPE_REGION:
570
571 Info->OpRegionInit++;
572 Status = AcpiDsGetRegionArguments (ObjDesc);
573 break;
574
575 case ACPI_TYPE_BUFFER_FIELD:
576
577 Info->FieldInit++;
578 Status = AcpiDsGetBufferFieldArguments (ObjDesc);
579 break;
580
581 case ACPI_TYPE_LOCAL_BANK_FIELD:
582
583 Info->FieldInit++;
584 Status = AcpiDsGetBankFieldArguments (ObjDesc);
585 break;
586
587 case ACPI_TYPE_BUFFER:
588
589 Info->BufferInit++;
590 Status = AcpiDsGetBufferArguments (ObjDesc);
591 break;
592
593 case ACPI_TYPE_PACKAGE:
594
595 /* Complete the initialization/resolution of the package object */
596
597 Info->PackageInit++;
598 Status = AcpiNsInitOnePackage (ObjHandle, Level, NULL, NULL);
599 break;
600
601 default:
602
603 /* No other types can get here */
604
605 break;
606 }
607
608 if (ACPI_FAILURE (Status))
609 {
610 ACPI_EXCEPTION ((AE_INFO, Status,
611 "Could not execute arguments for [%4.4s] (%s)",
612 AcpiUtGetNodeName (Node), AcpiUtGetTypeName (Type)));
613 }
614
615 /*
616 * We ignore errors from above, and always return OK, since we don't want
617 * to abort the walk on any single error.
618 */
619 AcpiExExitInterpreter ();
620 return (AE_OK);
621 }
622
623
624 /*******************************************************************************
625 *
626 * FUNCTION: AcpiNsFindIniMethods
627 *
628 * PARAMETERS: ACPI_WALK_CALLBACK
629 *
630 * RETURN: ACPI_STATUS
631 *
632 * DESCRIPTION: Called during namespace walk. Finds objects named _INI under
633 * device/processor/thermal objects, and marks the entire subtree
634 * with a SUBTREE_HAS_INI flag. This flag is used during the
635 * subsequent device initialization walk to avoid entire subtrees
636 * that do not contain an _INI.
637 *
638 ******************************************************************************/
639
640 static ACPI_STATUS
AcpiNsFindIniMethods(ACPI_HANDLE ObjHandle,UINT32 NestingLevel,void * Context,void ** ReturnValue)641 AcpiNsFindIniMethods (
642 ACPI_HANDLE ObjHandle,
643 UINT32 NestingLevel,
644 void *Context,
645 void **ReturnValue)
646 {
647 ACPI_DEVICE_WALK_INFO *Info = ACPI_CAST_PTR (ACPI_DEVICE_WALK_INFO, Context);
648 ACPI_NAMESPACE_NODE *Node;
649 ACPI_NAMESPACE_NODE *ParentNode;
650
651
652 /* Keep count of device/processor/thermal objects */
653
654 Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjHandle);
655 if ((Node->Type == ACPI_TYPE_DEVICE) ||
656 (Node->Type == ACPI_TYPE_PROCESSOR) ||
657 (Node->Type == ACPI_TYPE_THERMAL))
658 {
659 Info->DeviceCount++;
660 return (AE_OK);
661 }
662
663 /* We are only looking for methods named _INI */
664
665 if (!ACPI_COMPARE_NAME (Node->Name.Ascii, METHOD_NAME__INI))
666 {
667 return (AE_OK);
668 }
669
670 /*
671 * The only _INI methods that we care about are those that are
672 * present under Device, Processor, and Thermal objects.
673 */
674 ParentNode = Node->Parent;
675 switch (ParentNode->Type)
676 {
677 case ACPI_TYPE_DEVICE:
678 case ACPI_TYPE_PROCESSOR:
679 case ACPI_TYPE_THERMAL:
680
681 /* Mark parent and bubble up the INI present flag to the root */
682
683 while (ParentNode)
684 {
685 ParentNode->Flags |= ANOBJ_SUBTREE_HAS_INI;
686 ParentNode = ParentNode->Parent;
687 }
688 break;
689
690 default:
691
692 break;
693 }
694
695 return (AE_OK);
696 }
697
698
699 /*******************************************************************************
700 *
701 * FUNCTION: AcpiNsInitOneDevice
702 *
703 * PARAMETERS: ACPI_WALK_CALLBACK
704 *
705 * RETURN: ACPI_STATUS
706 *
707 * DESCRIPTION: This is called once per device soon after ACPI is enabled
708 * to initialize each device. It determines if the device is
709 * present, and if so, calls _INI.
710 *
711 ******************************************************************************/
712
713 static ACPI_STATUS
AcpiNsInitOneDevice(ACPI_HANDLE ObjHandle,UINT32 NestingLevel,void * Context,void ** ReturnValue)714 AcpiNsInitOneDevice (
715 ACPI_HANDLE ObjHandle,
716 UINT32 NestingLevel,
717 void *Context,
718 void **ReturnValue)
719 {
720 ACPI_DEVICE_WALK_INFO *WalkInfo = ACPI_CAST_PTR (ACPI_DEVICE_WALK_INFO, Context);
721 ACPI_EVALUATE_INFO *Info = WalkInfo->EvaluateInfo;
722 UINT32 Flags;
723 ACPI_STATUS Status;
724 ACPI_NAMESPACE_NODE *DeviceNode;
725
726
727 ACPI_FUNCTION_TRACE (NsInitOneDevice);
728
729
730 /* We are interested in Devices, Processors and ThermalZones only */
731
732 DeviceNode = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjHandle);
733 if ((DeviceNode->Type != ACPI_TYPE_DEVICE) &&
734 (DeviceNode->Type != ACPI_TYPE_PROCESSOR) &&
735 (DeviceNode->Type != ACPI_TYPE_THERMAL))
736 {
737 return_ACPI_STATUS (AE_OK);
738 }
739
740 /*
741 * Because of an earlier namespace analysis, all subtrees that contain an
742 * _INI method are tagged.
743 *
744 * If this device subtree does not contain any _INI methods, we
745 * can exit now and stop traversing this entire subtree.
746 */
747 if (!(DeviceNode->Flags & ANOBJ_SUBTREE_HAS_INI))
748 {
749 return_ACPI_STATUS (AE_CTRL_DEPTH);
750 }
751
752 /*
753 * Run _STA to determine if this device is present and functioning. We
754 * must know this information for two important reasons (from ACPI spec):
755 *
756 * 1) We can only run _INI if the device is present.
757 * 2) We must abort the device tree walk on this subtree if the device is
758 * not present and is not functional (we will not examine the children)
759 *
760 * The _STA method is not required to be present under the device, we
761 * assume the device is present if _STA does not exist.
762 */
763 ACPI_DEBUG_EXEC (AcpiUtDisplayInitPathname (
764 ACPI_TYPE_METHOD, DeviceNode, METHOD_NAME__STA));
765
766 Status = AcpiUtExecute_STA (DeviceNode, &Flags);
767 if (ACPI_FAILURE (Status))
768 {
769 /* Ignore error and move on to next device */
770
771 return_ACPI_STATUS (AE_OK);
772 }
773
774 /*
775 * Flags == -1 means that _STA was not found. In this case, we assume that
776 * the device is both present and functional.
777 *
778 * From the ACPI spec, description of _STA:
779 *
780 * "If a device object (including the processor object) does not have an
781 * _STA object, then OSPM assumes that all of the above bits are set (in
782 * other words, the device is present, ..., and functioning)"
783 */
784 if (Flags != ACPI_UINT32_MAX)
785 {
786 WalkInfo->Num_STA++;
787 }
788
789 /*
790 * Examine the PRESENT and FUNCTIONING status bits
791 *
792 * Note: ACPI spec does not seem to specify behavior for the present but
793 * not functioning case, so we assume functioning if present.
794 */
795 if (!(Flags & ACPI_STA_DEVICE_PRESENT))
796 {
797 /* Device is not present, we must examine the Functioning bit */
798
799 if (Flags & ACPI_STA_DEVICE_FUNCTIONING)
800 {
801 /*
802 * Device is not present but is "functioning". In this case,
803 * we will not run _INI, but we continue to examine the children
804 * of this device.
805 *
806 * From the ACPI spec, description of _STA: (Note - no mention
807 * of whether to run _INI or not on the device in question)
808 *
809 * "_STA may return bit 0 clear (not present) with bit 3 set
810 * (device is functional). This case is used to indicate a valid
811 * device for which no device driver should be loaded (for example,
812 * a bridge device.) Children of this device may be present and
813 * valid. OSPM should continue enumeration below a device whose
814 * _STA returns this bit combination"
815 */
816 return_ACPI_STATUS (AE_OK);
817 }
818 else
819 {
820 /*
821 * Device is not present and is not functioning. We must abort the
822 * walk of this subtree immediately -- don't look at the children
823 * of such a device.
824 *
825 * From the ACPI spec, description of _INI:
826 *
827 * "If the _STA method indicates that the device is not present,
828 * OSPM will not run the _INI and will not examine the children
829 * of the device for _INI methods"
830 */
831 return_ACPI_STATUS (AE_CTRL_DEPTH);
832 }
833 }
834
835 /*
836 * The device is present or is assumed present if no _STA exists.
837 * Run the _INI if it exists (not required to exist)
838 *
839 * Note: We know there is an _INI within this subtree, but it may not be
840 * under this particular device, it may be lower in the branch.
841 */
842 if (!ACPI_COMPARE_NAME (DeviceNode->Name.Ascii, "_SB_") ||
843 DeviceNode->Parent != AcpiGbl_RootNode)
844 {
845 ACPI_DEBUG_EXEC (AcpiUtDisplayInitPathname (
846 ACPI_TYPE_METHOD, DeviceNode, METHOD_NAME__INI));
847
848 memset (Info, 0, sizeof (ACPI_EVALUATE_INFO));
849 Info->PrefixNode = DeviceNode;
850 Info->RelativePathname = METHOD_NAME__INI;
851 Info->Parameters = NULL;
852 Info->Flags = ACPI_IGNORE_RETURN_VALUE;
853
854 Status = AcpiNsEvaluate (Info);
855 if (ACPI_SUCCESS (Status))
856 {
857 WalkInfo->Num_INI++;
858 }
859
860 #ifdef ACPI_DEBUG_OUTPUT
861 else if (Status != AE_NOT_FOUND)
862 {
863 /* Ignore error and move on to next device */
864
865 char *ScopeName = AcpiNsGetNormalizedPathname (DeviceNode, TRUE);
866
867 ACPI_EXCEPTION ((AE_INFO, Status, "during %s._INI execution",
868 ScopeName));
869 ACPI_FREE (ScopeName);
870 }
871 #endif
872 }
873
874 /* Ignore errors from above */
875
876 Status = AE_OK;
877
878 /*
879 * The _INI method has been run if present; call the Global Initialization
880 * Handler for this device.
881 */
882 if (AcpiGbl_InitHandler)
883 {
884 Status = AcpiGbl_InitHandler (DeviceNode, ACPI_INIT_DEVICE_INI);
885 }
886
887 return_ACPI_STATUS (Status);
888 }
889