1 /*******************************************************************************
3 * Module Name: nsxfeval - Public interfaces to the ACPI subsystem
4 * ACPI Object evaluation interfaces
6 ******************************************************************************/
8 /******************************************************************************
12 * Some or all of this work - Copyright (c) 1999 - 2009, Intel Corp.
13 * All rights reserved.
17 * 2.1. This is your license from Intel Corp. under its intellectual property
18 * rights. You may have additional license terms from the party that provided
19 * you this software, covering your right to use that party's intellectual
22 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
23 * copy of the source code appearing in this file ("Covered Code") an
24 * irrevocable, perpetual, worldwide license under Intel's copyrights in the
25 * base code distributed originally by Intel ("Original Intel Code") to copy,
26 * make derivatives, distribute, use and display any portion of the Covered
27 * Code in any form, with the right to sublicense such rights; and
29 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
30 * license (with the right to sublicense), under only those claims of Intel
31 * patents that are infringed by the Original Intel Code, to make, use, sell,
32 * offer to sell, and import the Covered Code and derivative works thereof
33 * solely to the minimum extent necessary to exercise the above copyright
34 * license, and in no event shall the patent license extend to any additions
35 * to or modifications of the Original Intel Code. No other license or right
36 * is granted directly or by implication, estoppel or otherwise;
38 * The above copyright and patent license is granted only if the following
43 * 3.1. Redistribution of Source with Rights to Further Distribute Source.
44 * Redistribution of source code of any substantial portion of the Covered
45 * Code or modification with rights to further distribute source must include
46 * the above Copyright Notice, the above License, this list of Conditions,
47 * and the following Disclaimer and Export Compliance provision. In addition,
48 * Licensee must cause all Covered Code to which Licensee contributes to
49 * contain a file documenting the changes Licensee made to create that Covered
50 * Code and the date of any change. Licensee must include in that file the
51 * documentation of any changes made by any predecessor Licensee. Licensee
52 * must include a prominent statement that the modification is derived,
53 * directly or indirectly, from Original Intel Code.
55 * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
56 * Redistribution of source code of any substantial portion of the Covered
57 * Code or modification without rights to further distribute source must
58 * include the following Disclaimer and Export Compliance provision in the
59 * documentation and/or other materials provided with distribution. In
60 * addition, Licensee may not authorize further sublicense of source of any
61 * portion of the Covered Code, and must include terms to the effect that the
62 * license from Licensee to its licensee is limited to the intellectual
63 * property embodied in the software Licensee provides to its licensee, and
64 * not to intellectual property embodied in modifications its licensee may
67 * 3.3. Redistribution of Executable. Redistribution in executable form of any
68 * substantial portion of the Covered Code or modification must reproduce the
69 * above Copyright Notice, and the following Disclaimer and Export Compliance
70 * provision in the documentation and/or other materials provided with the
73 * 3.4. Intel retains all right, title, and interest in and to the Original
76 * 3.5. Neither the name Intel nor any other trademark owned or controlled by
77 * Intel shall be used in advertising or otherwise to promote the sale, use or
78 * other dealings in products derived from or relating to the Covered Code
79 * without prior written authorization from Intel.
81 * 4. Disclaimer and Export Compliance
83 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
84 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
85 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
86 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
87 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
88 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
91 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
92 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
93 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
94 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
95 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
96 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
97 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
100 * 4.3. Licensee shall not export, either directly or indirectly, any of this
101 * software or system incorporating such software without first obtaining any
102 * required license or other approval from the U. S. Department of Commerce or
103 * any other agency or department of the United States Government. In the
104 * event Licensee exports any such software from the United States or
105 * re-exports any such software from a foreign destination, Licensee shall
106 * ensure that the distribution and export/re-export of the software is in
107 * compliance with all laws, regulations, orders, or other restrictions of the
108 * U.S. Export Administration Regulations. Licensee agrees that neither it nor
109 * any of its subsidiaries will export/re-export any technical data, process,
110 * software, or service, directly or indirectly, to any country for which the
111 * United States government or any agency thereof requires an export license,
112 * other governmental approval, or letter of assurance, without first obtaining
113 * such license, approval or letter.
115 *****************************************************************************/
118 #define __NSXFEVAL_C__
120 #include <contrib/dev/acpica/include/acpi.h>
121 #include <contrib/dev/acpica/include/accommon.h>
122 #include <contrib/dev/acpica/include/acnamesp.h>
123 #include <contrib/dev/acpica/include/acinterp.h>
126 #define _COMPONENT ACPI_NAMESPACE
127 ACPI_MODULE_NAME ("nsxfeval")
129 /* Local prototypes */
132 AcpiNsResolveReferences (
133 ACPI_EVALUATE_INFO *Info);
136 /*******************************************************************************
138 * FUNCTION: AcpiEvaluateObjectTyped
140 * PARAMETERS: Handle - Object handle (optional)
141 * Pathname - Object pathname (optional)
142 * ExternalParams - List of parameters to pass to method,
143 * terminated by NULL. May be NULL
144 * if no parameters are being passed.
145 * ReturnBuffer - Where to put method's return value (if
146 * any). If NULL, no value is returned.
147 * ReturnType - Expected type of return object
151 * DESCRIPTION: Find and evaluate the given object, passing the given
152 * parameters if necessary. One of "Handle" or "Pathname" must
153 * be valid (non-null)
155 ******************************************************************************/
158 AcpiEvaluateObjectTyped (
160 ACPI_STRING Pathname,
161 ACPI_OBJECT_LIST *ExternalParams,
162 ACPI_BUFFER *ReturnBuffer,
163 ACPI_OBJECT_TYPE ReturnType)
166 BOOLEAN MustFree = FALSE;
169 ACPI_FUNCTION_TRACE (AcpiEvaluateObjectTyped);
172 /* Return buffer must be valid */
176 return_ACPI_STATUS (AE_BAD_PARAMETER);
179 if (ReturnBuffer->Length == ACPI_ALLOCATE_BUFFER)
184 /* Evaluate the object */
186 Status = AcpiEvaluateObject (Handle, Pathname, ExternalParams, ReturnBuffer);
187 if (ACPI_FAILURE (Status))
189 return_ACPI_STATUS (Status);
192 /* Type ANY means "don't care" */
194 if (ReturnType == ACPI_TYPE_ANY)
196 return_ACPI_STATUS (AE_OK);
199 if (ReturnBuffer->Length == 0)
201 /* Error because caller specifically asked for a return value */
203 ACPI_ERROR ((AE_INFO, "No return value"));
204 return_ACPI_STATUS (AE_NULL_OBJECT);
207 /* Examine the object type returned from EvaluateObject */
209 if (((ACPI_OBJECT *) ReturnBuffer->Pointer)->Type == ReturnType)
211 return_ACPI_STATUS (AE_OK);
214 /* Return object type does not match requested type */
216 ACPI_ERROR ((AE_INFO,
217 "Incorrect return type [%s] requested [%s]",
218 AcpiUtGetTypeName (((ACPI_OBJECT *) ReturnBuffer->Pointer)->Type),
219 AcpiUtGetTypeName (ReturnType)));
223 /* Caller used ACPI_ALLOCATE_BUFFER, free the return buffer */
225 AcpiOsFree (ReturnBuffer->Pointer);
226 ReturnBuffer->Pointer = NULL;
229 ReturnBuffer->Length = 0;
230 return_ACPI_STATUS (AE_TYPE);
233 ACPI_EXPORT_SYMBOL (AcpiEvaluateObjectTyped)
236 /*******************************************************************************
238 * FUNCTION: AcpiEvaluateObject
240 * PARAMETERS: Handle - Object handle (optional)
241 * Pathname - Object pathname (optional)
242 * ExternalParams - List of parameters to pass to method,
243 * terminated by NULL. May be NULL
244 * if no parameters are being passed.
245 * ReturnBuffer - Where to put method's return value (if
246 * any). If NULL, no value is returned.
250 * DESCRIPTION: Find and evaluate the given object, passing the given
251 * parameters if necessary. One of "Handle" or "Pathname" must
252 * be valid (non-null)
254 ******************************************************************************/
259 ACPI_STRING Pathname,
260 ACPI_OBJECT_LIST *ExternalParams,
261 ACPI_BUFFER *ReturnBuffer)
264 ACPI_EVALUATE_INFO *Info;
265 ACPI_SIZE BufferSpaceNeeded;
269 ACPI_FUNCTION_TRACE (AcpiEvaluateObject);
272 /* Allocate and initialize the evaluation information block */
274 Info = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO));
277 return_ACPI_STATUS (AE_NO_MEMORY);
280 Info->Pathname = Pathname;
282 /* Convert and validate the device handle */
284 Info->PrefixNode = AcpiNsMapHandleToNode (Handle);
285 if (!Info->PrefixNode)
287 Status = AE_BAD_PARAMETER;
292 * If there are parameters to be passed to a control method, the external
293 * objects must all be converted to internal objects
295 if (ExternalParams && ExternalParams->Count)
298 * Allocate a new parameter block for the internal objects
299 * Add 1 to count to allow for null terminated internal list
301 Info->Parameters = ACPI_ALLOCATE_ZEROED (
302 ((ACPI_SIZE) ExternalParams->Count + 1) * sizeof (void *));
303 if (!Info->Parameters)
305 Status = AE_NO_MEMORY;
309 /* Convert each external object in the list to an internal object */
311 for (i = 0; i < ExternalParams->Count; i++)
313 Status = AcpiUtCopyEobjectToIobject (
314 &ExternalParams->Pointer[i], &Info->Parameters[i]);
315 if (ACPI_FAILURE (Status))
320 Info->Parameters[ExternalParams->Count] = NULL;
325 * 1) Fully qualified pathname
326 * 2) No handle, not fully qualified pathname (error)
330 (AcpiNsValidRootPrefix (Pathname[0])))
332 /* The path is fully qualified, just evaluate by name */
334 Info->PrefixNode = NULL;
335 Status = AcpiNsEvaluate (Info);
340 * A handle is optional iff a fully qualified pathname is specified.
341 * Since we've already handled fully qualified names above, this is
346 ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
347 "Both Handle and Pathname are NULL"));
351 ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
352 "Null Handle with relative pathname [%s]", Pathname));
355 Status = AE_BAD_PARAMETER;
359 /* We have a namespace a node and a possible relative path */
361 Status = AcpiNsEvaluate (Info);
365 * If we are expecting a return value, and all went well above,
366 * copy the return value to an external object.
370 if (!Info->ReturnObject)
372 ReturnBuffer->Length = 0;
376 if (ACPI_GET_DESCRIPTOR_TYPE (Info->ReturnObject) ==
377 ACPI_DESC_TYPE_NAMED)
380 * If we received a NS Node as a return object, this means that
381 * the object we are evaluating has nothing interesting to
382 * return (such as a mutex, etc.) We return an error because
383 * these types are essentially unsupported by this interface.
384 * We don't check up front because this makes it easier to add
385 * support for various types at a later date if necessary.
388 Info->ReturnObject = NULL; /* No need to delete a NS Node */
389 ReturnBuffer->Length = 0;
392 if (ACPI_SUCCESS (Status))
394 /* Dereference Index and RefOf references */
396 AcpiNsResolveReferences (Info);
398 /* Get the size of the returned object */
400 Status = AcpiUtGetObjectSize (Info->ReturnObject,
402 if (ACPI_SUCCESS (Status))
404 /* Validate/Allocate/Clear caller buffer */
406 Status = AcpiUtInitializeBuffer (ReturnBuffer,
408 if (ACPI_FAILURE (Status))
411 * Caller's buffer is too small or a new one can't
414 ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
415 "Needed buffer size %X, %s\n",
416 (UINT32) BufferSpaceNeeded,
417 AcpiFormatException (Status)));
421 /* We have enough space for the object, build it */
423 Status = AcpiUtCopyIobjectToEobject (Info->ReturnObject,
431 if (Info->ReturnObject)
434 * Delete the internal return object. NOTE: Interpreter must be
435 * locked to avoid race condition.
437 AcpiExEnterInterpreter ();
439 /* Remove one reference on the return object (should delete it) */
441 AcpiUtRemoveReference (Info->ReturnObject);
442 AcpiExExitInterpreter ();
448 /* Free the input parameter list (if we created one) */
450 if (Info->Parameters)
452 /* Free the allocated parameter block */
454 AcpiUtDeleteInternalObjectList (Info->Parameters);
458 return_ACPI_STATUS (Status);
461 ACPI_EXPORT_SYMBOL (AcpiEvaluateObject)
464 /*******************************************************************************
466 * FUNCTION: AcpiNsResolveReferences
468 * PARAMETERS: Info - Evaluation info block
470 * RETURN: Info->ReturnObject is replaced with the dereferenced object
472 * DESCRIPTION: Dereference certain reference objects. Called before an
473 * internal return object is converted to an external ACPI_OBJECT.
475 * Performs an automatic dereference of Index and RefOf reference objects.
476 * These reference objects are not supported by the ACPI_OBJECT, so this is a
477 * last resort effort to return something useful. Also, provides compatibility
478 * with other ACPI implementations.
480 * NOTE: does not handle references within returned package objects or nested
481 * references, but this support could be added later if found to be necessary.
483 ******************************************************************************/
486 AcpiNsResolveReferences (
487 ACPI_EVALUATE_INFO *Info)
489 ACPI_OPERAND_OBJECT *ObjDesc = NULL;
490 ACPI_NAMESPACE_NODE *Node;
493 /* We are interested in reference objects only */
495 if ((Info->ReturnObject)->Common.Type != ACPI_TYPE_LOCAL_REFERENCE)
501 * Two types of references are supported - those created by Index and
502 * RefOf operators. A name reference (AML_NAMEPATH_OP) can be converted
503 * to an ACPI_OBJECT, so it is not dereferenced here. A DdbHandle
504 * (AML_LOAD_OP) cannot be dereferenced, nor can it be converted to
507 switch (Info->ReturnObject->Reference.Class)
509 case ACPI_REFCLASS_INDEX:
511 ObjDesc = *(Info->ReturnObject->Reference.Where);
514 case ACPI_REFCLASS_REFOF:
516 Node = Info->ReturnObject->Reference.Object;
519 ObjDesc = Node->Object;
527 /* Replace the existing reference object */
531 AcpiUtAddReference (ObjDesc);
532 AcpiUtRemoveReference (Info->ReturnObject);
533 Info->ReturnObject = ObjDesc;
540 /*******************************************************************************
542 * FUNCTION: AcpiWalkNamespace
544 * PARAMETERS: Type - ACPI_OBJECT_TYPE to search for
545 * StartObject - Handle in namespace where search begins
546 * MaxDepth - Depth to which search is to reach
547 * UserFunction - Called when an object of "Type" is found
548 * Context - Passed to user function
549 * ReturnValue - Location where return value of
550 * UserFunction is put if terminated early
552 * RETURNS Return value from the UserFunction if terminated early.
553 * Otherwise, returns NULL.
555 * DESCRIPTION: Performs a modified depth-first walk of the namespace tree,
556 * starting (and ending) at the object specified by StartHandle.
557 * The UserFunction is called whenever an object that matches
558 * the type parameter is found. If the user function returns
559 * a non-zero value, the search is terminated immediately and this
560 * value is returned to the caller.
562 * The point of this procedure is to provide a generic namespace
563 * walk routine that can be called from multiple places to
564 * provide multiple services; the User Function can be tailored
565 * to each task, whether it is a print function, a compare
568 ******************************************************************************/
572 ACPI_OBJECT_TYPE Type,
573 ACPI_HANDLE StartObject,
575 ACPI_WALK_CALLBACK UserFunction,
582 ACPI_FUNCTION_TRACE (AcpiWalkNamespace);
585 /* Parameter validation */
587 if ((Type > ACPI_TYPE_LOCAL_MAX) ||
591 return_ACPI_STATUS (AE_BAD_PARAMETER);
595 * Need to acquire the namespace reader lock to prevent interference
596 * with any concurrent table unloads (which causes the deletion of
597 * namespace objects). We cannot allow the deletion of a namespace node
598 * while the user function is using it. The exception to this are the
599 * nodes created and deleted during control method execution -- these
600 * nodes are marked as temporary nodes and are ignored by the namespace
601 * walk. Thus, control methods can be executed while holding the
602 * namespace deletion lock (and the user function can execute control
605 Status = AcpiUtAcquireReadLock (&AcpiGbl_NamespaceRwLock);
606 if (ACPI_FAILURE (Status))
612 * Lock the namespace around the walk. The namespace will be
613 * unlocked/locked around each call to the user function - since the user
614 * function must be allowed to make ACPICA calls itself (for example, it
615 * will typically execute control methods during device enumeration.)
617 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
618 if (ACPI_FAILURE (Status))
623 Status = AcpiNsWalkNamespace (Type, StartObject, MaxDepth,
624 ACPI_NS_WALK_UNLOCK, UserFunction, Context, ReturnValue);
626 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
629 (void) AcpiUtReleaseReadLock (&AcpiGbl_NamespaceRwLock);
630 return_ACPI_STATUS (Status);
633 ACPI_EXPORT_SYMBOL (AcpiWalkNamespace)
636 /*******************************************************************************
638 * FUNCTION: AcpiNsGetDeviceCallback
640 * PARAMETERS: Callback from AcpiGetDevice
644 * DESCRIPTION: Takes callbacks from WalkNamespace and filters out all non-
645 * present devices, or if they specified a HID, it filters based
648 ******************************************************************************/
651 AcpiNsGetDeviceCallback (
652 ACPI_HANDLE ObjHandle,
657 ACPI_GET_DEVICES_INFO *Info = Context;
659 ACPI_NAMESPACE_NODE *Node;
662 ACPI_COMPATIBLE_ID_LIST *Cid;
667 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
668 if (ACPI_FAILURE (Status))
673 Node = AcpiNsMapHandleToNode (ObjHandle);
674 Status = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
675 if (ACPI_FAILURE (Status))
682 return (AE_BAD_PARAMETER);
685 /* Run _STA to determine if device is present */
687 Status = AcpiUtExecute_STA (Node, &Flags);
688 if (ACPI_FAILURE (Status))
690 return (AE_CTRL_DEPTH);
693 if (!(Flags & ACPI_STA_DEVICE_PRESENT) &&
694 !(Flags & ACPI_STA_DEVICE_FUNCTIONING))
697 * Don't examine the children of the device only when the
698 * device is neither present nor functional. See ACPI spec,
699 * description of _STA for more information.
701 return (AE_CTRL_DEPTH);
704 /* Filter based on device HID & CID */
706 if (Info->Hid != NULL)
708 Status = AcpiUtExecute_HID (Node, &Hid);
709 if (Status == AE_NOT_FOUND)
713 else if (ACPI_FAILURE (Status))
715 return (AE_CTRL_DEPTH);
718 if (ACPI_STRNCMP (Hid.Value, Info->Hid, sizeof (Hid.Value)) != 0)
721 * HID does not match, attempt match within the
722 * list of Compatible IDs (CIDs)
724 Status = AcpiUtExecute_CID (Node, &Cid);
725 if (Status == AE_NOT_FOUND)
729 else if (ACPI_FAILURE (Status))
731 return (AE_CTRL_DEPTH);
734 /* Walk the CID list */
737 for (i = 0; i < Cid->Count; i++)
739 if (ACPI_STRNCMP (Cid->Id[i].Value, Info->Hid,
740 sizeof (ACPI_COMPATIBLE_ID)) == 0)
742 /* Found a matching CID */
757 /* We have a valid device, invoke the user function */
759 Status = Info->UserFunction (ObjHandle, NestingLevel, Info->Context,
765 /*******************************************************************************
767 * FUNCTION: AcpiGetDevices
769 * PARAMETERS: HID - HID to search for. Can be NULL.
770 * UserFunction - Called when a matching object is found
771 * Context - Passed to user function
772 * ReturnValue - Location where return value of
773 * UserFunction is put if terminated early
775 * RETURNS Return value from the UserFunction if terminated early.
776 * Otherwise, returns NULL.
778 * DESCRIPTION: Performs a modified depth-first walk of the namespace tree,
779 * starting (and ending) at the object specified by StartHandle.
780 * The UserFunction is called whenever an object of type
781 * Device is found. If the user function returns
782 * a non-zero value, the search is terminated immediately and this
783 * value is returned to the caller.
785 * This is a wrapper for WalkNamespace, but the callback performs
786 * additional filtering. Please see AcpiNsGetDeviceCallback.
788 ******************************************************************************/
793 ACPI_WALK_CALLBACK UserFunction,
798 ACPI_GET_DEVICES_INFO Info;
801 ACPI_FUNCTION_TRACE (AcpiGetDevices);
804 /* Parameter validation */
808 return_ACPI_STATUS (AE_BAD_PARAMETER);
812 * We're going to call their callback from OUR callback, so we need
813 * to know what it is, and their context parameter.
816 Info.Context = Context;
817 Info.UserFunction = UserFunction;
820 * Lock the namespace around the walk.
821 * The namespace will be unlocked/locked around each call
822 * to the user function - since this function
823 * must be allowed to make Acpi calls itself.
825 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
826 if (ACPI_FAILURE (Status))
828 return_ACPI_STATUS (Status);
831 Status = AcpiNsWalkNamespace (ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
832 ACPI_UINT32_MAX, ACPI_NS_WALK_UNLOCK,
833 AcpiNsGetDeviceCallback, &Info, ReturnValue);
835 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
836 return_ACPI_STATUS (Status);
839 ACPI_EXPORT_SYMBOL (AcpiGetDevices)
842 /*******************************************************************************
844 * FUNCTION: AcpiAttachData
846 * PARAMETERS: ObjHandle - Namespace node
847 * Handler - Handler for this attachment
848 * Data - Pointer to data to be attached
852 * DESCRIPTION: Attach arbitrary data and handler to a namespace node.
854 ******************************************************************************/
858 ACPI_HANDLE ObjHandle,
859 ACPI_OBJECT_HANDLER Handler,
862 ACPI_NAMESPACE_NODE *Node;
866 /* Parameter validation */
872 return (AE_BAD_PARAMETER);
875 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
876 if (ACPI_FAILURE (Status))
881 /* Convert and validate the handle */
883 Node = AcpiNsMapHandleToNode (ObjHandle);
886 Status = AE_BAD_PARAMETER;
890 Status = AcpiNsAttachData (Node, Handler, Data);
893 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
897 ACPI_EXPORT_SYMBOL (AcpiAttachData)
900 /*******************************************************************************
902 * FUNCTION: AcpiDetachData
904 * PARAMETERS: ObjHandle - Namespace node handle
905 * Handler - Handler used in call to AcpiAttachData
909 * DESCRIPTION: Remove data that was previously attached to a node.
911 ******************************************************************************/
915 ACPI_HANDLE ObjHandle,
916 ACPI_OBJECT_HANDLER Handler)
918 ACPI_NAMESPACE_NODE *Node;
922 /* Parameter validation */
927 return (AE_BAD_PARAMETER);
930 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
931 if (ACPI_FAILURE (Status))
936 /* Convert and validate the handle */
938 Node = AcpiNsMapHandleToNode (ObjHandle);
941 Status = AE_BAD_PARAMETER;
945 Status = AcpiNsDetachData (Node, Handler);
948 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
952 ACPI_EXPORT_SYMBOL (AcpiDetachData)
955 /*******************************************************************************
957 * FUNCTION: AcpiGetData
959 * PARAMETERS: ObjHandle - Namespace node
960 * Handler - Handler used in call to AttachData
961 * Data - Where the data is returned
965 * DESCRIPTION: Retrieve data that was previously attached to a namespace node.
967 ******************************************************************************/
971 ACPI_HANDLE ObjHandle,
972 ACPI_OBJECT_HANDLER Handler,
975 ACPI_NAMESPACE_NODE *Node;
979 /* Parameter validation */
985 return (AE_BAD_PARAMETER);
988 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
989 if (ACPI_FAILURE (Status))
994 /* Convert and validate the handle */
996 Node = AcpiNsMapHandleToNode (ObjHandle);
999 Status = AE_BAD_PARAMETER;
1003 Status = AcpiNsGetAttachedData (Node, Handler, Data);
1006 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
1010 ACPI_EXPORT_SYMBOL (AcpiGetData)