freebsd-dev/sys/contrib/dev/acpica/nsxfobj.c

853 lines
27 KiB
C

/*******************************************************************************
*
* Module Name: nsxfobj - Public interfaces to the ACPI subsystem
* ACPI Object oriented interfaces
* $Revision: 80 $
*
******************************************************************************/
/******************************************************************************
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999, 2000, 2001, 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 __NSXFOBJ_C__
#include "acpi.h"
#include "acinterp.h"
#include "acnamesp.h"
#include "acdispat.h"
#define _COMPONENT NAMESPACE
MODULE_NAME ("nsxfobj")
/*******************************************************************************
*
* FUNCTION: AcpiEvaluateObject
*
* PARAMETERS: Handle - Object handle (optional)
* *Pathname - Object pathname (optional)
* **Params - List of parameters to pass to
* method, terminated by NULL.
* Params itself may be NULL
* if no parameters are being
* passed.
* *ReturnObject - 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 *ParamObjects,
ACPI_BUFFER *ReturnBuffer)
{
ACPI_STATUS Status;
ACPI_OPERAND_OBJECT **ParamPtr = NULL;
ACPI_OPERAND_OBJECT *ReturnObj = NULL;
ACPI_OPERAND_OBJECT *ObjectPtr = NULL;
UINT32 BufferSpaceNeeded;
UINT32 UserBufferLength;
UINT32 Count;
UINT32 i;
UINT32 ParamLength;
UINT32 ObjectLength;
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 (ParamObjects && ParamObjects->Count)
{
/*
* Allocate a new parameter block for the internal objects
* Add 1 to count to allow for null terminated internal list
*/
Count = ParamObjects->Count;
ParamLength = (Count + 1) * sizeof (void *);
ObjectLength = Count * sizeof (ACPI_OPERAND_OBJECT);
ParamPtr = AcpiCmCallocate (ParamLength + /* Parameter List part */
ObjectLength); /* Actual objects */
if (!ParamPtr)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
ObjectPtr = (ACPI_OPERAND_OBJECT *) ((UINT8 *) ParamPtr +
ParamLength);
/*
* Init the param array of pointers and NULL terminate
* the list
*/
for (i = 0; i < Count; i++)
{
ParamPtr[i] = &ObjectPtr[i];
AcpiCmInitStaticObject (&ObjectPtr[i]);
}
ParamPtr[Count] = NULL;
/*
* Convert each external object in the list to an
* internal object
*/
for (i = 0; i < Count; i++)
{
Status = AcpiCmCopyEobjectToIobject (&ParamObjects->Pointer[i],
ParamPtr[i]);
if (ACPI_FAILURE (Status))
{
AcpiCmDeleteInternalObjectList (ParamPtr);
return_ACPI_STATUS (Status);
}
}
}
/*
* 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, ParamPtr, &ReturnObj);
}
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)
{
DEBUG_PRINT (ACPI_ERROR,
("AcpiEvaluateObject: Both Handle and Pathname are NULL\n"));
}
else
{
DEBUG_PRINT (ACPI_ERROR,
("AcpiEvaluateObject: 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, ParamPtr, &ReturnObj);
}
else
{
/*
* Both a Handle and a relative Pathname
*/
Status = AcpiNsEvaluateRelative (Handle, Pathname, ParamPtr,
&ReturnObj);
}
}
/*
* If we are expecting a return value, and all went well above,
* copy the return value to an external object.
*/
if (ReturnBuffer)
{
UserBufferLength = ReturnBuffer->Length;
ReturnBuffer->Length = 0;
if (ReturnObj)
{
if (VALID_DESCRIPTOR_TYPE (ReturnObj, ACPI_DESC_TYPE_NAMED))
{
/*
* If we got an Node as a return object,
* this means 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;
ReturnObj = NULL; /* No need to delete an Node */
}
if (ACPI_SUCCESS (Status))
{
/*
* Find out how large a buffer is needed
* to contain the returned object
*/
Status = AcpiCmGetObjectSize (ReturnObj,
&BufferSpaceNeeded);
if (ACPI_SUCCESS (Status))
{
/*
* Check if there is enough room in the
* caller's buffer
*/
if (UserBufferLength < BufferSpaceNeeded)
{
/*
* Caller's buffer is too small, can't
* give him partial results fail the call
* but return the buffer size needed
*/
DEBUG_PRINT (ACPI_INFO,
("AcpiEvaluateObject: Needed buffer size %X, received %X\n",
BufferSpaceNeeded, UserBufferLength));
ReturnBuffer->Length = BufferSpaceNeeded;
Status = AE_BUFFER_OVERFLOW;
}
else
{
/*
* We have enough space for the object, build it
*/
Status = AcpiCmCopyIobjectToEobject (ReturnObj,
ReturnBuffer);
ReturnBuffer->Length = BufferSpaceNeeded;
}
}
}
}
}
/* Delete the return and parameter objects */
if (ReturnObj)
{
/*
* Delete the internal return object. (Or at least
* decrement the reference count by one)
*/
AcpiCmRemoveReference (ReturnObj);
}
/*
* Free the input parameter list (if we created one),
*/
if (ParamPtr)
{
/* Free the allocated parameter block */
AcpiCmDeleteInternalObjectList (ParamPtr);
}
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiGetNextObject
*
* PARAMETERS: Type - Type of object to be searched for
* Parent - Parent object whose children we are getting
* LastChild - Previous child that was found.
* The NEXT child will be returned
* RetHandle - Where handle to the next object is placed
*
* RETURN: Status
*
* DESCRIPTION: Return the next peer object within the namespace. If Handle is
* valid, Scope is ignored. Otherwise, the first object within
* Scope is returned.
*
******************************************************************************/
ACPI_STATUS
AcpiGetNextObject (
ACPI_OBJECT_TYPE Type,
ACPI_HANDLE Parent,
ACPI_HANDLE Child,
ACPI_HANDLE *RetHandle)
{
ACPI_STATUS Status = AE_OK;
ACPI_NAMESPACE_NODE *Node;
ACPI_NAMESPACE_NODE *ParentNode = NULL;
ACPI_NAMESPACE_NODE *ChildNode = NULL;
/* Parameter validation */
if (Type > ACPI_TYPE_MAX)
{
return (AE_BAD_PARAMETER);
}
AcpiCmAcquireMutex (ACPI_MTX_NAMESPACE);
/* If null handle, use the parent */
if (!Child)
{
/* Start search at the beginning of the specified scope */
ParentNode = AcpiNsConvertHandleToEntry (Parent);
if (!ParentNode)
{
Status = AE_BAD_PARAMETER;
goto UnlockAndExit;
}
}
/* Non-null handle, ignore the parent */
else
{
/* Convert and validate the handle */
ChildNode = AcpiNsConvertHandleToEntry (Child);
if (!ChildNode)
{
Status = AE_BAD_PARAMETER;
goto UnlockAndExit;
}
}
/* Internal function does the real work */
Node = AcpiNsGetNextObject ((OBJECT_TYPE_INTERNAL) Type,
ParentNode, ChildNode);
if (!Node)
{
Status = AE_NOT_FOUND;
goto UnlockAndExit;
}
if (RetHandle)
{
*RetHandle = AcpiNsConvertEntryToHandle (Node);
}
UnlockAndExit:
AcpiCmReleaseMutex (ACPI_MTX_NAMESPACE);
return (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiGetType
*
* PARAMETERS: Handle - Handle of object whose type is desired
* *RetType - Where the type will be placed
*
* RETURN: Status
*
* DESCRIPTION: This routine returns the type associatd with a particular handle
*
******************************************************************************/
ACPI_STATUS
AcpiGetType (
ACPI_HANDLE Handle,
ACPI_OBJECT_TYPE *RetType)
{
ACPI_NAMESPACE_NODE *Node;
/* Parameter Validation */
if (!RetType)
{
return (AE_BAD_PARAMETER);
}
/*
* Special case for the predefined Root Node
* (return type ANY)
*/
if (Handle == ACPI_ROOT_OBJECT)
{
*RetType = ACPI_TYPE_ANY;
return (AE_OK);
}
AcpiCmAcquireMutex (ACPI_MTX_NAMESPACE);
/* Convert and validate the handle */
Node = AcpiNsConvertHandleToEntry (Handle);
if (!Node)
{
AcpiCmReleaseMutex (ACPI_MTX_NAMESPACE);
return (AE_BAD_PARAMETER);
}
*RetType = Node->Type;
AcpiCmReleaseMutex (ACPI_MTX_NAMESPACE);
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiGetParent
*
* PARAMETERS: Handle - Handle of object whose parent is desired
* RetHandle - Where the parent handle will be placed
*
* RETURN: Status
*
* DESCRIPTION: Returns a handle to the parent of the object represented by
* Handle.
*
******************************************************************************/
ACPI_STATUS
AcpiGetParent (
ACPI_HANDLE Handle,
ACPI_HANDLE *RetHandle)
{
ACPI_NAMESPACE_NODE *Node;
ACPI_STATUS Status = AE_OK;
/* No trace macro, too verbose */
if (!RetHandle)
{
return (AE_BAD_PARAMETER);
}
/* Special case for the predefined Root Node (no parent) */
if (Handle == ACPI_ROOT_OBJECT)
{
return (AE_NULL_ENTRY);
}
AcpiCmAcquireMutex (ACPI_MTX_NAMESPACE);
/* Convert and validate the handle */
Node = AcpiNsConvertHandleToEntry (Handle);
if (!Node)
{
Status = AE_BAD_PARAMETER;
goto UnlockAndExit;
}
/* Get the parent entry */
*RetHandle =
AcpiNsConvertEntryToHandle (AcpiNsGetParentObject (Node));
/* Return exeption if parent is null */
if (!AcpiNsGetParentObject (Node))
{
Status = AE_NULL_ENTRY;
}
UnlockAndExit:
AcpiCmReleaseMutex (ACPI_MTX_NAMESPACE);
return (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,
WALK_CALLBACK UserFunction,
void *Context,
void **ReturnValue)
{
ACPI_STATUS Status;
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.
*/
AcpiCmAcquireMutex (ACPI_MTX_NAMESPACE);
Status = AcpiNsWalkNamespace ((OBJECT_TYPE_INTERNAL) Type,
StartObject, MaxDepth,
NS_WALK_UNLOCK,
UserFunction, Context,
ReturnValue);
AcpiCmReleaseMutex (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;
DEVICE_ID DeviceId;
ACPI_GET_DEVICES_INFO *Info;
Info = Context;
AcpiCmAcquireMutex (ACPI_MTX_NAMESPACE);
Node = AcpiNsConvertHandleToEntry (ObjHandle);
AcpiCmReleaseMutex (ACPI_MTX_NAMESPACE);
if (!Node)
{
return (AE_BAD_PARAMETER);
}
/*
* Run _STA to determine if device is present
*/
Status = AcpiCmExecute_STA (Node, &Flags);
if (ACPI_FAILURE (Status))
{
return (Status);
}
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
*/
if (Info->Hid != NULL)
{
Status = AcpiCmExecute_HID (Node, &DeviceId);
if (Status == AE_NOT_FOUND)
{
return (AE_OK);
}
else if (ACPI_FAILURE (Status))
{
return (Status);
}
if (STRNCMP (DeviceId.Buffer, Info->Hid, sizeof (DeviceId.Buffer)) != 0)
{
return (AE_OK);
}
}
Info->UserFunction (ObjHandle, NestingLevel, Info->Context, ReturnValue);
return (AE_OK);
}
/*******************************************************************************
*
* 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,
WALK_CALLBACK UserFunction,
void *Context,
void **ReturnValue)
{
ACPI_STATUS Status;
ACPI_GET_DEVICES_INFO Info;
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.
*/
AcpiCmAcquireMutex (ACPI_MTX_NAMESPACE);
Status = AcpiNsWalkNamespace (ACPI_TYPE_DEVICE,
ACPI_ROOT_OBJECT, ACPI_UINT32_MAX,
NS_WALK_UNLOCK,
AcpiNsGetDeviceCallback, &Info,
ReturnValue);
AcpiCmReleaseMutex (ACPI_MTX_NAMESPACE);
return_ACPI_STATUS (Status);
}