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Diffstat (limited to 'sys/contrib/dev/acpica/nsxfeval.c')
| -rw-r--r-- | sys/contrib/dev/acpica/nsxfeval.c | 866 |
1 files changed, 866 insertions, 0 deletions
diff --git a/sys/contrib/dev/acpica/nsxfeval.c b/sys/contrib/dev/acpica/nsxfeval.c new file mode 100644 index 000000000000..3986871633a3 --- /dev/null +++ b/sys/contrib/dev/acpica/nsxfeval.c @@ -0,0 +1,866 @@ +/******************************************************************************* + * + * Module Name: nsxfeval - Public interfaces to the ACPI subsystem + * ACPI Object evaluation interfaces + * $Revision: 1 $ + * + ******************************************************************************/ + +/****************************************************************************** + * + * 1. Copyright Notice + * + * Some or all of this work - Copyright (c) 1999 - 2002, Intel Corp. + * All rights reserved. + * + * 2. License + * + * 2.1. This is your license from Intel Corp. under its intellectual property + * rights. You may have additional license terms from the party that provided + * you this software, covering your right to use that party's intellectual + * property rights. + * + * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a + * copy of the source code appearing in this file ("Covered Code") an + * irrevocable, perpetual, worldwide license under Intel's copyrights in the + * base code distributed originally by Intel ("Original Intel Code") to copy, + * make derivatives, distribute, use and display any portion of the Covered + * Code in any form, with the right to sublicense such rights; and + * + * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent + * license (with the right to sublicense), under only those claims of Intel + * patents that are infringed by the Original Intel Code, to make, use, sell, + * offer to sell, and import the Covered Code and derivative works thereof + * solely to the minimum extent necessary to exercise the above copyright + * license, and in no event shall the patent license extend to any additions + * to or modifications of the Original Intel Code. No other license or right + * is granted directly or by implication, estoppel or otherwise; + * + * The above copyright and patent license is granted only if the following + * conditions are met: + * + * 3. Conditions + * + * 3.1. Redistribution of Source with Rights to Further Distribute Source. + * Redistribution of source code of any substantial portion of the Covered + * Code or modification with rights to further distribute source must include + * the above Copyright Notice, the above License, this list of Conditions, + * and the following Disclaimer and Export Compliance provision. In addition, + * Licensee must cause all Covered Code to which Licensee contributes to + * contain a file documenting the changes Licensee made to create that Covered + * Code and the date of any change. Licensee must include in that file the + * documentation of any changes made by any predecessor Licensee. Licensee + * must include a prominent statement that the modification is derived, + * directly or indirectly, from Original Intel Code. + * + * 3.2. Redistribution of Source with no Rights to Further Distribute Source. + * Redistribution of source code of any substantial portion of the Covered + * Code or modification without rights to further distribute source must + * include the following Disclaimer and Export Compliance provision in the + * documentation and/or other materials provided with distribution. In + * addition, Licensee may not authorize further sublicense of source of any + * portion of the Covered Code, and must include terms to the effect that the + * license from Licensee to its licensee is limited to the intellectual + * property embodied in the software Licensee provides to its licensee, and + * not to intellectual property embodied in modifications its licensee may + * make. + * + * 3.3. Redistribution of Executable. Redistribution in executable form of any + * substantial portion of the Covered Code or modification must reproduce the + * above Copyright Notice, and the following Disclaimer and Export Compliance + * provision in the documentation and/or other materials provided with the + * distribution. + * + * 3.4. Intel retains all right, title, and interest in and to the Original + * Intel Code. + * + * 3.5. Neither the name Intel nor any other trademark owned or controlled by + * Intel shall be used in advertising or otherwise to promote the sale, use or + * other dealings in products derived from or relating to the Covered Code + * without prior written authorization from Intel. + * + * 4. Disclaimer and Export Compliance + * + * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED + * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE + * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, + * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY + * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY + * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A + * PARTICULAR PURPOSE. + * + * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES + * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR + * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, + * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY + * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL + * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS + * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY + * LIMITED REMEDY. + * + * 4.3. Licensee shall not export, either directly or indirectly, any of this + * software or system incorporating such software without first obtaining any + * required license or other approval from the U. S. Department of Commerce or + * any other agency or department of the United States Government. In the + * event Licensee exports any such software from the United States or + * re-exports any such software from a foreign destination, Licensee shall + * ensure that the distribution and export/re-export of the software is in + * compliance with all laws, regulations, orders, or other restrictions of the + * U.S. Export Administration Regulations. Licensee agrees that neither it nor + * any of its subsidiaries will export/re-export any technical data, process, + * software, or service, directly or indirectly, to any country for which the + * United States government or any agency thereof requires an export license, + * other governmental approval, or letter of assurance, without first obtaining + * such license, approval or letter. + * + *****************************************************************************/ + + +#define __NSXFEVAL_C__ + +#include "acpi.h" +#include "acnamesp.h" + + +#define _COMPONENT ACPI_NAMESPACE + ACPI_MODULE_NAME ("nsxfeval") + + +/******************************************************************************* + * + * FUNCTION: AcpiEvaluateObjectTyped + * + * PARAMETERS: Handle - Object handle (optional) + * *Pathname - Object pathname (optional) + * **ExternalParams - List of parameters to pass to method, + * terminated by NULL. May be NULL + * if no parameters are being passed. + * *ReturnBuffer - Where to put method's return value (if + * any). If NULL, no value is returned. + * ReturnType - Expected type of return object + * + * RETURN: Status + * + * DESCRIPTION: Find and evaluate the given object, passing the given + * parameters if necessary. One of "Handle" or "Pathname" must + * be valid (non-null) + * + ******************************************************************************/ + +ACPI_STATUS +AcpiEvaluateObjectTyped ( + ACPI_HANDLE Handle, + ACPI_STRING Pathname, + ACPI_OBJECT_LIST *ExternalParams, + ACPI_BUFFER *ReturnBuffer, + ACPI_OBJECT_TYPE ReturnType) +{ + ACPI_STATUS Status; + BOOLEAN MustFree = FALSE; + + + ACPI_FUNCTION_TRACE ("AcpiEvaluateObjectTyped"); + + + /* Return buffer must be valid */ + + if (!ReturnBuffer) + { + return_ACPI_STATUS (AE_BAD_PARAMETER); + } + + if (ReturnBuffer->Length == ACPI_ALLOCATE_BUFFER) + { + MustFree = TRUE; + } + + /* Evaluate the object */ + + Status = AcpiEvaluateObject (Handle, Pathname, ExternalParams, ReturnBuffer); + if (ACPI_FAILURE (Status)) + { + return_ACPI_STATUS (Status); + } + + /* Type ANY means "don't care" */ + + if (ReturnType == ACPI_TYPE_ANY) + { + return_ACPI_STATUS (AE_OK); + } + + if (ReturnBuffer->Length == 0) + { + /* Error because caller specifically asked for a return value */ + + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, + "No return value\n")); + + return_ACPI_STATUS (AE_NULL_OBJECT); + } + + /* Examine the object type returned from EvaluateObject */ + + if (((ACPI_OBJECT *) ReturnBuffer->Pointer)->Type == ReturnType) + { + return_ACPI_STATUS (AE_OK); + } + + /* Return object type does not match requested type */ + + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, + "Incorrect return type [%s] requested [%s]\n", + AcpiUtGetTypeName (((ACPI_OBJECT *) ReturnBuffer->Pointer)->Type), + AcpiUtGetTypeName (ReturnType))); + + if (MustFree) + { + /* Caller used ACPI_ALLOCATE_BUFFER, free the return buffer */ + + AcpiOsFree (ReturnBuffer->Pointer); + ReturnBuffer->Pointer = NULL; + } + + ReturnBuffer->Length = 0; + return_ACPI_STATUS (AE_TYPE); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiEvaluateObject + * + * PARAMETERS: Handle - Object handle (optional) + * *Pathname - Object pathname (optional) + * **ExternalParams - List of parameters to pass to method, + * terminated by NULL. May be NULL + * if no parameters are being passed. + * *ReturnBuffer - Where to put method's return value (if + * any). If NULL, no value is returned. + * + * RETURN: Status + * + * DESCRIPTION: Find and evaluate the given object, passing the given + * parameters if necessary. One of "Handle" or "Pathname" must + * be valid (non-null) + * + ******************************************************************************/ + +ACPI_STATUS +AcpiEvaluateObject ( + ACPI_HANDLE Handle, + ACPI_STRING Pathname, + ACPI_OBJECT_LIST *ExternalParams, + ACPI_BUFFER *ReturnBuffer) +{ + ACPI_STATUS Status; + ACPI_OPERAND_OBJECT **InternalParams = NULL; + ACPI_OPERAND_OBJECT *InternalReturnObj = NULL; + ACPI_SIZE BufferSpaceNeeded; + UINT32 i; + + + ACPI_FUNCTION_TRACE ("AcpiEvaluateObject"); + + + /* + * If there are parameters to be passed to the object + * (which must be a control method), the external objects + * must be converted to internal objects + */ + if (ExternalParams && ExternalParams->Count) + { + /* + * Allocate a new parameter block for the internal objects + * Add 1 to count to allow for null terminated internal list + */ + InternalParams = ACPI_MEM_CALLOCATE (((ACPI_SIZE) ExternalParams->Count + 1) * + sizeof (void *)); + if (!InternalParams) + { + return_ACPI_STATUS (AE_NO_MEMORY); + } + + /* + * Convert each external object in the list to an + * internal object + */ + for (i = 0; i < ExternalParams->Count; i++) + { + Status = AcpiUtCopyEobjectToIobject (&ExternalParams->Pointer[i], + &InternalParams[i]); + if (ACPI_FAILURE (Status)) + { + AcpiUtDeleteInternalObjectList (InternalParams); + return_ACPI_STATUS (Status); + } + } + InternalParams[ExternalParams->Count] = NULL; + } + + /* + * Three major cases: + * 1) Fully qualified pathname + * 2) No handle, not fully qualified pathname (error) + * 3) Valid handle + */ + if ((Pathname) && + (AcpiNsValidRootPrefix (Pathname[0]))) + { + /* + * The path is fully qualified, just evaluate by name + */ + Status = AcpiNsEvaluateByName (Pathname, InternalParams, + &InternalReturnObj); + } + else if (!Handle) + { + /* + * A handle is optional iff a fully qualified pathname + * is specified. Since we've already handled fully + * qualified names above, this is an error + */ + if (!Pathname) + { + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, + "Both Handle and Pathname are NULL\n")); + } + else + { + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, + "Handle is NULL and Pathname is relative\n")); + } + + Status = AE_BAD_PARAMETER; + } + else + { + /* + * We get here if we have a handle -- and if we have a + * pathname it is relative. The handle will be validated + * in the lower procedures + */ + if (!Pathname) + { + /* + * The null pathname case means the handle is for + * the actual object to be evaluated + */ + Status = AcpiNsEvaluateByHandle (Handle, InternalParams, + &InternalReturnObj); + } + else + { + /* + * Both a Handle and a relative Pathname + */ + Status = AcpiNsEvaluateRelative (Handle, Pathname, InternalParams, + &InternalReturnObj); + } + } + + + /* + * If we are expecting a return value, and all went well above, + * copy the return value to an external object. + */ + if (ReturnBuffer) + { + if (!InternalReturnObj) + { + ReturnBuffer->Length = 0; + } + else + { + if (ACPI_GET_DESCRIPTOR_TYPE (InternalReturnObj) == ACPI_DESC_TYPE_NAMED) + { + /* + * If we received a NS Node as a return object, this means that + * the object we are evaluating has nothing interesting to + * return (such as a mutex, etc.) We return an error because + * these types are essentially unsupported by this interface. + * We don't check up front because this makes it easier to add + * support for various types at a later date if necessary. + */ + Status = AE_TYPE; + InternalReturnObj = NULL; /* No need to delete a NS Node */ + ReturnBuffer->Length = 0; + } + + if (ACPI_SUCCESS (Status)) + { + /* + * Find out how large a buffer is needed + * to contain the returned object + */ + Status = AcpiUtGetObjectSize (InternalReturnObj, + &BufferSpaceNeeded); + if (ACPI_SUCCESS (Status)) + { + /* Validate/Allocate/Clear caller buffer */ + + Status = AcpiUtInitializeBuffer (ReturnBuffer, BufferSpaceNeeded); + if (ACPI_FAILURE (Status)) + { + /* + * Caller's buffer is too small or a new one can't be allocated + */ + ACPI_DEBUG_PRINT ((ACPI_DB_INFO, + "Needed buffer size %X, %s\n", + (UINT32) BufferSpaceNeeded, AcpiFormatException (Status))); + } + else + { + /* + * We have enough space for the object, build it + */ + Status = AcpiUtCopyIobjectToEobject (InternalReturnObj, + ReturnBuffer); + } + } + } + } + } + + /* Delete the return and parameter objects */ + + if (InternalReturnObj) + { + /* + * Delete the internal return object. (Or at least + * decrement the reference count by one) + */ + AcpiUtRemoveReference (InternalReturnObj); + } + + /* + * Free the input parameter list (if we created one), + */ + if (InternalParams) + { + /* Free the allocated parameter block */ + + AcpiUtDeleteInternalObjectList (InternalParams); + } + + return_ACPI_STATUS (Status); +} + + + +/******************************************************************************* + * + * FUNCTION: AcpiWalkNamespace + * + * PARAMETERS: Type - ACPI_OBJECT_TYPE to search for + * StartObject - Handle in namespace where search begins + * MaxDepth - Depth to which search is to reach + * UserFunction - Called when an object of "Type" is found + * Context - Passed to user function + * ReturnValue - Location where return value of + * UserFunction is put if terminated early + * + * RETURNS Return value from the UserFunction if terminated early. + * Otherwise, returns NULL. + * + * DESCRIPTION: Performs a modified depth-first walk of the namespace tree, + * starting (and ending) at the object specified by StartHandle. + * The UserFunction is called whenever an object that matches + * the type parameter is found. If the user function returns + * a non-zero value, the search is terminated immediately and this + * value is returned to the caller. + * + * The point of this procedure is to provide a generic namespace + * walk routine that can be called from multiple places to + * provide multiple services; the User Function can be tailored + * to each task, whether it is a print function, a compare + * function, etc. + * + ******************************************************************************/ + +ACPI_STATUS +AcpiWalkNamespace ( + ACPI_OBJECT_TYPE Type, + ACPI_HANDLE StartObject, + UINT32 MaxDepth, + ACPI_WALK_CALLBACK UserFunction, + void *Context, + void **ReturnValue) +{ + ACPI_STATUS Status; + + + ACPI_FUNCTION_TRACE ("AcpiWalkNamespace"); + + + /* Parameter validation */ + + if ((Type > ACPI_TYPE_MAX) || + (!MaxDepth) || + (!UserFunction)) + { + return_ACPI_STATUS (AE_BAD_PARAMETER); + } + + /* + * Lock the namespace around the walk. + * The namespace will be unlocked/locked around each call + * to the user function - since this function + * must be allowed to make Acpi calls itself. + */ + Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); + if (ACPI_FAILURE (Status)) + { + return_ACPI_STATUS (Status); + } + + Status = AcpiNsWalkNamespace (Type, StartObject, MaxDepth, ACPI_NS_WALK_UNLOCK, + UserFunction, Context, ReturnValue); + + (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); + return_ACPI_STATUS (Status); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiNsGetDeviceCallback + * + * PARAMETERS: Callback from AcpiGetDevice + * + * RETURN: Status + * + * DESCRIPTION: Takes callbacks from WalkNamespace and filters out all non- + * present devices, or if they specified a HID, it filters based + * on that. + * + ******************************************************************************/ + +static ACPI_STATUS +AcpiNsGetDeviceCallback ( + ACPI_HANDLE ObjHandle, + UINT32 NestingLevel, + void *Context, + void **ReturnValue) +{ + ACPI_STATUS Status; + ACPI_NAMESPACE_NODE *Node; + UINT32 Flags; + ACPI_DEVICE_ID Hid; + ACPI_DEVICE_ID Cid; + ACPI_GET_DEVICES_INFO *Info; + + + Info = Context; + + Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); + if (ACPI_FAILURE (Status)) + { + return (Status); + } + + Node = AcpiNsMapHandleToNode (ObjHandle); + Status = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); + if (ACPI_FAILURE (Status)) + { + return (Status); + } + + if (!Node) + { + return (AE_BAD_PARAMETER); + } + + /* + * Run _STA to determine if device is present + */ + Status = AcpiUtExecute_STA (Node, &Flags); + if (ACPI_FAILURE (Status)) + { + return (AE_CTRL_DEPTH); + } + + if (!(Flags & 0x01)) + { + /* Don't return at the device or children of the device if not there */ + return (AE_CTRL_DEPTH); + } + + /* + * Filter based on device HID & CID + */ + if (Info->Hid != NULL) + { + Status = AcpiUtExecute_HID (Node, &Hid); + if (Status == AE_NOT_FOUND) + { + return (AE_OK); + } + else if (ACPI_FAILURE (Status)) + { + return (AE_CTRL_DEPTH); + } + + if (ACPI_STRNCMP (Hid.Buffer, Info->Hid, sizeof (Hid.Buffer)) != 0) + { + Status = AcpiUtExecute_CID (Node, &Cid); + if (Status == AE_NOT_FOUND) + { + return (AE_OK); + } + else if (ACPI_FAILURE (Status)) + { + return (AE_CTRL_DEPTH); + } + + /* TBD: Handle CID packages */ + + if (ACPI_STRNCMP (Cid.Buffer, Info->Hid, sizeof (Cid.Buffer)) != 0) + { + return (AE_OK); + } + } + } + + Status = Info->UserFunction (ObjHandle, NestingLevel, Info->Context, ReturnValue); + return (Status); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiGetDevices + * + * PARAMETERS: HID - HID to search for. Can be NULL. + * UserFunction - Called when a matching object is found + * Context - Passed to user function + * ReturnValue - Location where return value of + * UserFunction is put if terminated early + * + * RETURNS Return value from the UserFunction if terminated early. + * Otherwise, returns NULL. + * + * DESCRIPTION: Performs a modified depth-first walk of the namespace tree, + * starting (and ending) at the object specified by StartHandle. + * The UserFunction is called whenever an object that matches + * the type parameter is found. If the user function returns + * a non-zero value, the search is terminated immediately and this + * value is returned to the caller. + * + * This is a wrapper for WalkNamespace, but the callback performs + * additional filtering. Please see AcpiGetDeviceCallback. + * + ******************************************************************************/ + +ACPI_STATUS +AcpiGetDevices ( + NATIVE_CHAR *HID, + ACPI_WALK_CALLBACK UserFunction, + void *Context, + void **ReturnValue) +{ + ACPI_STATUS Status; + ACPI_GET_DEVICES_INFO Info; + + + ACPI_FUNCTION_TRACE ("AcpiGetDevices"); + + + /* Parameter validation */ + + if (!UserFunction) + { + return_ACPI_STATUS (AE_BAD_PARAMETER); + } + + /* + * We're going to call their callback from OUR callback, so we need + * to know what it is, and their context parameter. + */ + Info.Context = Context; + Info.UserFunction = UserFunction; + Info.Hid = HID; + + /* + * Lock the namespace around the walk. + * The namespace will be unlocked/locked around each call + * to the user function - since this function + * must be allowed to make Acpi calls itself. + */ + Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); + if (ACPI_FAILURE (Status)) + { + return_ACPI_STATUS (Status); + } + + Status = AcpiNsWalkNamespace (ACPI_TYPE_DEVICE, + ACPI_ROOT_OBJECT, ACPI_UINT32_MAX, + ACPI_NS_WALK_UNLOCK, + AcpiNsGetDeviceCallback, &Info, + ReturnValue); + + (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); + return_ACPI_STATUS (Status); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiAttachData + * + * PARAMETERS: + * + * RETURN: Status + * + * DESCRIPTION: + * + ******************************************************************************/ + +ACPI_STATUS +AcpiAttachData ( + ACPI_HANDLE ObjHandle, + ACPI_OBJECT_HANDLER Handler, + void *Data) +{ + ACPI_NAMESPACE_NODE *Node; + ACPI_STATUS Status; + + + /* Parameter validation */ + + if (!ObjHandle || + !Handler || + !Data) + { + return (AE_BAD_PARAMETER); + } + + Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); + if (ACPI_FAILURE (Status)) + { + return (Status); + } + + /* Convert and validate the handle */ + + Node = AcpiNsMapHandleToNode (ObjHandle); + if (!Node) + { + Status = AE_BAD_PARAMETER; + goto UnlockAndExit; + } + + Status = AcpiNsAttachData (Node, Handler, Data); + +UnlockAndExit: + (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); + return (Status); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiDetachData + * + * PARAMETERS: + * + * RETURN: Status + * + * DESCRIPTION: + * + ******************************************************************************/ + +ACPI_STATUS +AcpiDetachData ( + ACPI_HANDLE ObjHandle, + ACPI_OBJECT_HANDLER Handler) +{ + ACPI_NAMESPACE_NODE *Node; + ACPI_STATUS Status; + + + /* Parameter validation */ + + if (!ObjHandle || + !Handler) + { + return (AE_BAD_PARAMETER); + } + + Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); + if (ACPI_FAILURE (Status)) + { + return (Status); + } + + /* Convert and validate the handle */ + + Node = AcpiNsMapHandleToNode (ObjHandle); + if (!Node) + { + Status = AE_BAD_PARAMETER; + goto UnlockAndExit; + } + + Status = AcpiNsDetachData (Node, Handler); + +UnlockAndExit: + (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); + return (Status); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiGetData + * + * PARAMETERS: + * + * RETURN: Status + * + * DESCRIPTION: + * + ******************************************************************************/ + +ACPI_STATUS +AcpiGetData ( + ACPI_HANDLE ObjHandle, + ACPI_OBJECT_HANDLER Handler, + void **Data) +{ + ACPI_NAMESPACE_NODE *Node; + ACPI_STATUS Status; + + + /* Parameter validation */ + + if (!ObjHandle || + !Handler || + !Data) + { + return (AE_BAD_PARAMETER); + } + + Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); + if (ACPI_FAILURE (Status)) + { + return (Status); + } + + /* Convert and validate the handle */ + + Node = AcpiNsMapHandleToNode (ObjHandle); + if (!Node) + { + Status = AE_BAD_PARAMETER; + goto UnlockAndExit; + } + + Status = AcpiNsGetAttachedData (Node, Handler, Data); + +UnlockAndExit: + (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); + return (Status); +} + + |