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/******************************************************************************
*
* Module Name: nsrepair - Repair for objects returned by predefined methods
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2011, Intel Corp.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*/
#define __NSREPAIR_C__
#include <contrib/dev/acpica/include/acpi.h>
#include <contrib/dev/acpica/include/accommon.h>
#include <contrib/dev/acpica/include/acnamesp.h>
#include <contrib/dev/acpica/include/acinterp.h>
#include <contrib/dev/acpica/include/acpredef.h>
#define _COMPONENT ACPI_NAMESPACE
ACPI_MODULE_NAME ("nsrepair")
/*******************************************************************************
*
* This module attempts to repair or convert objects returned by the
* predefined methods to an object type that is expected, as per the ACPI
* specification. The need for this code is dictated by the many machines that
* return incorrect types for the standard predefined methods. Performing these
* conversions here, in one place, eliminates the need for individual ACPI
* device drivers to do the same. Note: Most of these conversions are different
* than the internal object conversion routines used for implicit object
* conversion.
*
* The following conversions can be performed as necessary:
*
* Integer -> String
* Integer -> Buffer
* String -> Integer
* String -> Buffer
* Buffer -> Integer
* Buffer -> String
* Buffer -> Package of Integers
* Package -> Package of one Package
*
* Additional possible repairs:
*
* Required package elements that are NULL replaced by Integer/String/Buffer
* Incorrect standalone package wrapped with required outer package
*
******************************************************************************/
/* Local prototypes */
static ACPI_STATUS
AcpiNsConvertToInteger (
ACPI_OPERAND_OBJECT *OriginalObject,
ACPI_OPERAND_OBJECT **ReturnObject);
static ACPI_STATUS
AcpiNsConvertToString (
ACPI_OPERAND_OBJECT *OriginalObject,
ACPI_OPERAND_OBJECT **ReturnObject);
static ACPI_STATUS
AcpiNsConvertToBuffer (
ACPI_OPERAND_OBJECT *OriginalObject,
ACPI_OPERAND_OBJECT **ReturnObject);
static ACPI_STATUS
AcpiNsConvertToPackage (
ACPI_OPERAND_OBJECT *OriginalObject,
ACPI_OPERAND_OBJECT **ReturnObject);
/*******************************************************************************
*
* FUNCTION: AcpiNsRepairObject
*
* PARAMETERS: Data - Pointer to validation data structure
* ExpectedBtypes - Object types expected
* PackageIndex - Index of object within parent package (if
* applicable - ACPI_NOT_PACKAGE_ELEMENT
* otherwise)
* ReturnObjectPtr - Pointer to the object returned from the
* evaluation of a method or object
*
* RETURN: Status. AE_OK if repair was successful.
*
* DESCRIPTION: Attempt to repair/convert a return object of a type that was
* not expected.
*
******************************************************************************/
ACPI_STATUS
AcpiNsRepairObject (
ACPI_PREDEFINED_DATA *Data,
UINT32 ExpectedBtypes,
UINT32 PackageIndex,
ACPI_OPERAND_OBJECT **ReturnObjectPtr)
{
ACPI_OPERAND_OBJECT *ReturnObject = *ReturnObjectPtr;
ACPI_OPERAND_OBJECT *NewObject;
ACPI_STATUS Status;
ACPI_FUNCTION_NAME (NsRepairObject);
/*
* At this point, we know that the type of the returned object was not
* one of the expected types for this predefined name. Attempt to
* repair the object by converting it to one of the expected object
* types for this predefined name.
*/
if (ExpectedBtypes & ACPI_RTYPE_INTEGER)
{
Status = AcpiNsConvertToInteger (ReturnObject, &NewObject);
if (ACPI_SUCCESS (Status))
{
goto ObjectRepaired;
}
}
if (ExpectedBtypes & ACPI_RTYPE_STRING)
{
Status = AcpiNsConvertToString (ReturnObject, &NewObject);
if (ACPI_SUCCESS (Status))
{
goto ObjectRepaired;
}
}
if (ExpectedBtypes & ACPI_RTYPE_BUFFER)
{
Status = AcpiNsConvertToBuffer (ReturnObject, &NewObject);
if (ACPI_SUCCESS (Status))
{
goto ObjectRepaired;
}
}
if (ExpectedBtypes & ACPI_RTYPE_PACKAGE)
{
Status = AcpiNsConvertToPackage (ReturnObject, &NewObject);
if (ACPI_SUCCESS (Status))
{
goto ObjectRepaired;
}
}
/* We cannot repair this object */
return (AE_AML_OPERAND_TYPE);
ObjectRepaired:
/* Object was successfully repaired */
/*
* If the original object is a package element, we need to:
* 1. Set the reference count of the new object to match the
* reference count of the old object.
* 2. Decrement the reference count of the original object.
*/
if (PackageIndex != ACPI_NOT_PACKAGE_ELEMENT)
{
NewObject->Common.ReferenceCount =
ReturnObject->Common.ReferenceCount;
if (ReturnObject->Common.ReferenceCount > 1)
{
ReturnObject->Common.ReferenceCount--;
}
ACPI_DEBUG_PRINT ((ACPI_DB_REPAIR,
"%s: Converted %s to expected %s at index %u\n",
Data->Pathname, AcpiUtGetObjectTypeName (ReturnObject),
AcpiUtGetObjectTypeName (NewObject), PackageIndex));
}
else
{
ACPI_DEBUG_PRINT ((ACPI_DB_REPAIR,
"%s: Converted %s to expected %s\n",
Data->Pathname, AcpiUtGetObjectTypeName (ReturnObject),
AcpiUtGetObjectTypeName (NewObject)));
}
/* Delete old object, install the new return object */
AcpiUtRemoveReference (ReturnObject);
*ReturnObjectPtr = NewObject;
Data->Flags |= ACPI_OBJECT_REPAIRED;
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiNsConvertToInteger
*
* PARAMETERS: OriginalObject - Object to be converted
* ReturnObject - Where the new converted object is returned
*
* RETURN: Status. AE_OK if conversion was successful.
*
* DESCRIPTION: Attempt to convert a String/Buffer object to an Integer.
*
******************************************************************************/
static ACPI_STATUS
AcpiNsConvertToInteger (
ACPI_OPERAND_OBJECT *OriginalObject,
ACPI_OPERAND_OBJECT **ReturnObject)
{
ACPI_OPERAND_OBJECT *NewObject;
ACPI_STATUS Status;
UINT64 Value = 0;
UINT32 i;
switch (OriginalObject->Common.Type)
{
case ACPI_TYPE_STRING:
/* String-to-Integer conversion */
Status = AcpiUtStrtoul64 (OriginalObject->String.Pointer,
ACPI_ANY_BASE, &Value);
if (ACPI_FAILURE (Status))
{
return (Status);
}
break;
case ACPI_TYPE_BUFFER:
/* Buffer-to-Integer conversion. Max buffer size is 64 bits. */
if (OriginalObject->Buffer.Length > 8)
{
return (AE_AML_OPERAND_TYPE);
}
/* Extract each buffer byte to create the integer */
for (i = 0; i < OriginalObject->Buffer.Length; i++)
{
Value |= ((UINT64) OriginalObject->Buffer.Pointer[i] << (i * 8));
}
break;
default:
return (AE_AML_OPERAND_TYPE);
}
NewObject = AcpiUtCreateIntegerObject (Value);
if (!NewObject)
{
return (AE_NO_MEMORY);
}
*ReturnObject = NewObject;
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiNsConvertToString
*
* PARAMETERS: OriginalObject - Object to be converted
* ReturnObject - Where the new converted object is returned
*
* RETURN: Status. AE_OK if conversion was successful.
*
* DESCRIPTION: Attempt to convert a Integer/Buffer object to a String.
*
******************************************************************************/
static ACPI_STATUS
AcpiNsConvertToString (
ACPI_OPERAND_OBJECT *OriginalObject,
ACPI_OPERAND_OBJECT **ReturnObject)
{
ACPI_OPERAND_OBJECT *NewObject;
ACPI_SIZE Length;
ACPI_STATUS Status;
switch (OriginalObject->Common.Type)
{
case ACPI_TYPE_INTEGER:
/*
* Integer-to-String conversion. Commonly, convert
* an integer of value 0 to a NULL string. The last element of
* _BIF and _BIX packages occasionally need this fix.
*/
if (OriginalObject->Integer.Value == 0)
{
/* Allocate a new NULL string object */
NewObject = AcpiUtCreateStringObject (0);
if (!NewObject)
{
return (AE_NO_MEMORY);
}
}
else
{
Status = AcpiExConvertToString (OriginalObject, &NewObject,
ACPI_IMPLICIT_CONVERT_HEX);
if (ACPI_FAILURE (Status))
{
return (Status);
}
}
break;
case ACPI_TYPE_BUFFER:
/*
* Buffer-to-String conversion. Use a ToString
* conversion, no transform performed on the buffer data. The best
* example of this is the _BIF method, where the string data from
* the battery is often (incorrectly) returned as buffer object(s).
*/
Length = 0;
while ((Length < OriginalObject->Buffer.Length) &&
(OriginalObject->Buffer.Pointer[Length]))
{
Length++;
}
/* Allocate a new string object */
NewObject = AcpiUtCreateStringObject (Length);
if (!NewObject)
{
return (AE_NO_MEMORY);
}
/*
* Copy the raw buffer data with no transform. String is already NULL
* terminated at Length+1.
*/
ACPI_MEMCPY (NewObject->String.Pointer,
OriginalObject->Buffer.Pointer, Length);
break;
default:
return (AE_AML_OPERAND_TYPE);
}
*ReturnObject = NewObject;
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiNsConvertToBuffer
*
* PARAMETERS: OriginalObject - Object to be converted
* ReturnObject - Where the new converted object is returned
*
* RETURN: Status. AE_OK if conversion was successful.
*
* DESCRIPTION: Attempt to convert a Integer/String/Package object to a Buffer.
*
******************************************************************************/
static ACPI_STATUS
AcpiNsConvertToBuffer (
ACPI_OPERAND_OBJECT *OriginalObject,
ACPI_OPERAND_OBJECT **ReturnObject)
{
ACPI_OPERAND_OBJECT *NewObject;
ACPI_STATUS Status;
ACPI_OPERAND_OBJECT **Elements;
UINT32 *DwordBuffer;
UINT32 Count;
UINT32 i;
switch (OriginalObject->Common.Type)
{
case ACPI_TYPE_INTEGER:
/*
* Integer-to-Buffer conversion.
* Convert the Integer to a packed-byte buffer. _MAT and other
* objects need this sometimes, if a read has been performed on a
* Field object that is less than or equal to the global integer
* size (32 or 64 bits).
*/
Status = AcpiExConvertToBuffer (OriginalObject, &NewObject);
if (ACPI_FAILURE (Status))
{
return (Status);
}
break;
case ACPI_TYPE_STRING:
/* String-to-Buffer conversion. Simple data copy */
NewObject = AcpiUtCreateBufferObject (OriginalObject->String.Length);
if (!NewObject)
{
return (AE_NO_MEMORY);
}
ACPI_MEMCPY (NewObject->Buffer.Pointer,
OriginalObject->String.Pointer, OriginalObject->String.Length);
break;
case ACPI_TYPE_PACKAGE:
/*
* This case is often seen for predefined names that must return a
* Buffer object with multiple DWORD integers within. For example,
* _FDE and _GTM. The Package can be converted to a Buffer.
*/
/* All elements of the Package must be integers */
Elements = OriginalObject->Package.Elements;
Count = OriginalObject->Package.Count;
for (i = 0; i < Count; i++)
{
if ((!*Elements) ||
((*Elements)->Common.Type != ACPI_TYPE_INTEGER))
{
return (AE_AML_OPERAND_TYPE);
}
Elements++;
}
/* Create the new buffer object to replace the Package */
NewObject = AcpiUtCreateBufferObject (ACPI_MUL_4 (Count));
if (!NewObject)
{
return (AE_NO_MEMORY);
}
/* Copy the package elements (integers) to the buffer as DWORDs */
Elements = OriginalObject->Package.Elements;
DwordBuffer = ACPI_CAST_PTR (UINT32, NewObject->Buffer.Pointer);
for (i = 0; i < Count; i++)
{
*DwordBuffer = (UINT32) (*Elements)->Integer.Value;
DwordBuffer++;
Elements++;
}
break;
default:
return (AE_AML_OPERAND_TYPE);
}
*ReturnObject = NewObject;
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiNsConvertToPackage
*
* PARAMETERS: OriginalObject - Object to be converted
* ReturnObject - Where the new converted object is returned
*
* RETURN: Status. AE_OK if conversion was successful.
*
* DESCRIPTION: Attempt to convert a Buffer object to a Package. Each byte of
* the buffer is converted to a single integer package element.
*
******************************************************************************/
static ACPI_STATUS
AcpiNsConvertToPackage (
ACPI_OPERAND_OBJECT *OriginalObject,
ACPI_OPERAND_OBJECT **ReturnObject)
{
ACPI_OPERAND_OBJECT *NewObject;
ACPI_OPERAND_OBJECT **Elements;
UINT32 Length;
UINT8 *Buffer;
switch (OriginalObject->Common.Type)
{
case ACPI_TYPE_BUFFER:
/* Buffer-to-Package conversion */
Length = OriginalObject->Buffer.Length;
NewObject = AcpiUtCreatePackageObject (Length);
if (!NewObject)
{
return (AE_NO_MEMORY);
}
/* Convert each buffer byte to an integer package element */
Elements = NewObject->Package.Elements;
Buffer = OriginalObject->Buffer.Pointer;
while (Length--)
{
*Elements = AcpiUtCreateIntegerObject ((UINT64) *Buffer);
if (!*Elements)
{
AcpiUtRemoveReference (NewObject);
return (AE_NO_MEMORY);
}
Elements++;
Buffer++;
}
break;
default:
return (AE_AML_OPERAND_TYPE);
}
*ReturnObject = NewObject;
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiNsRepairNullElement
*
* PARAMETERS: Data - Pointer to validation data structure
* ExpectedBtypes - Object types expected
* PackageIndex - Index of object within parent package (if
* applicable - ACPI_NOT_PACKAGE_ELEMENT
* otherwise)
* ReturnObjectPtr - Pointer to the object returned from the
* evaluation of a method or object
*
* RETURN: Status. AE_OK if repair was successful.
*
* DESCRIPTION: Attempt to repair a NULL element of a returned Package object.
*
******************************************************************************/
ACPI_STATUS
AcpiNsRepairNullElement (
ACPI_PREDEFINED_DATA *Data,
UINT32 ExpectedBtypes,
UINT32 PackageIndex,
ACPI_OPERAND_OBJECT **ReturnObjectPtr)
{
ACPI_OPERAND_OBJECT *ReturnObject = *ReturnObjectPtr;
ACPI_OPERAND_OBJECT *NewObject;
ACPI_FUNCTION_NAME (NsRepairNullElement);
/* No repair needed if return object is non-NULL */
if (ReturnObject)
{
return (AE_OK);
}
/*
* Attempt to repair a NULL element of a Package object. This applies to
* predefined names that return a fixed-length package and each element
* is required. It does not apply to variable-length packages where NULL
* elements are allowed, especially at the end of the package.
*/
if (ExpectedBtypes & ACPI_RTYPE_INTEGER)
{
/* Need an Integer - create a zero-value integer */
NewObject = AcpiUtCreateIntegerObject ((UINT64) 0);
}
else if (ExpectedBtypes & ACPI_RTYPE_STRING)
{
/* Need a String - create a NULL string */
NewObject = AcpiUtCreateStringObject (0);
}
else if (ExpectedBtypes & ACPI_RTYPE_BUFFER)
{
/* Need a Buffer - create a zero-length buffer */
NewObject = AcpiUtCreateBufferObject (0);
}
else
{
/* Error for all other expected types */
return (AE_AML_OPERAND_TYPE);
}
if (!NewObject)
{
return (AE_NO_MEMORY);
}
/* Set the reference count according to the parent Package object */
NewObject->Common.ReferenceCount = Data->ParentPackage->Common.ReferenceCount;
ACPI_DEBUG_PRINT ((ACPI_DB_REPAIR,
"%s: Converted NULL package element to expected %s at index %u\n",
Data->Pathname, AcpiUtGetObjectTypeName (NewObject), PackageIndex));
*ReturnObjectPtr = NewObject;
Data->Flags |= ACPI_OBJECT_REPAIRED;
return (AE_OK);
}
/******************************************************************************
*
* FUNCTION: AcpiNsRemoveNullElements
*
* PARAMETERS: Data - Pointer to validation data structure
* PackageType - An AcpiReturnPackageTypes value
* ObjDesc - A Package object
*
* RETURN: None.
*
* DESCRIPTION: Remove all NULL package elements from packages that contain
* a variable number of sub-packages. For these types of
* packages, NULL elements can be safely removed.
*
*****************************************************************************/
void
AcpiNsRemoveNullElements (
ACPI_PREDEFINED_DATA *Data,
UINT8 PackageType,
ACPI_OPERAND_OBJECT *ObjDesc)
{
ACPI_OPERAND_OBJECT **Source;
ACPI_OPERAND_OBJECT **Dest;
UINT32 Count;
UINT32 NewCount;
UINT32 i;
ACPI_FUNCTION_NAME (NsRemoveNullElements);
/*
* We can safely remove all NULL elements from these package types:
* PTYPE1_VAR packages contain a variable number of simple data types.
* PTYPE2 packages contain a variable number of sub-packages.
*/
switch (PackageType)
{
case ACPI_PTYPE1_VAR:
case ACPI_PTYPE2:
case ACPI_PTYPE2_COUNT:
case ACPI_PTYPE2_PKG_COUNT:
case ACPI_PTYPE2_FIXED:
case ACPI_PTYPE2_MIN:
case ACPI_PTYPE2_REV_FIXED:
break;
default:
case ACPI_PTYPE1_FIXED:
case ACPI_PTYPE1_OPTION:
return;
}
Count = ObjDesc->Package.Count;
NewCount = Count;
Source = ObjDesc->Package.Elements;
Dest = Source;
/* Examine all elements of the package object, remove nulls */
for (i = 0; i < Count; i++)
{
if (!*Source)
{
NewCount--;
}
else
{
*Dest = *Source;
Dest++;
}
Source++;
}
/* Update parent package if any null elements were removed */
if (NewCount < Count)
{
ACPI_DEBUG_PRINT ((ACPI_DB_REPAIR,
"%s: Found and removed %u NULL elements\n",
Data->Pathname, (Count - NewCount)));
/* NULL terminate list and update the package count */
*Dest = NULL;
ObjDesc->Package.Count = NewCount;
}
}
/*******************************************************************************
*
* FUNCTION: AcpiNsRepairPackageList
*
* PARAMETERS: Data - Pointer to validation data structure
* ObjDescPtr - Pointer to the object to repair. The new
* package object is returned here,
* overwriting the old object.
*
* RETURN: Status, new object in *ObjDescPtr
*
* DESCRIPTION: Repair a common problem with objects that are defined to return
* a variable-length Package of Packages. If the variable-length
* is one, some BIOS code mistakenly simply declares a single
* Package instead of a Package with one sub-Package. This
* function attempts to repair this error by wrapping a Package
* object around the original Package, creating the correct
* Package with one sub-Package.
*
* Names that can be repaired in this manner include:
* _ALR, _CSD, _HPX, _MLS, _PRT, _PSS, _TRT, TSS
*
******************************************************************************/
ACPI_STATUS
AcpiNsRepairPackageList (
ACPI_PREDEFINED_DATA *Data,
ACPI_OPERAND_OBJECT **ObjDescPtr)
{
ACPI_OPERAND_OBJECT *PkgObjDesc;
ACPI_FUNCTION_NAME (NsRepairPackageList);
/*
* Create the new outer package and populate it. The new package will
* have a single element, the lone subpackage.
*/
PkgObjDesc = AcpiUtCreatePackageObject (1);
if (!PkgObjDesc)
{
return (AE_NO_MEMORY);
}
PkgObjDesc->Package.Elements[0] = *ObjDescPtr;
/* Return the new object in the object pointer */
*ObjDescPtr = PkgObjDesc;
Data->Flags |= ACPI_OBJECT_REPAIRED;
ACPI_DEBUG_PRINT ((ACPI_DB_REPAIR,
"%s: Repaired incorrectly formed Package\n", Data->Pathname));
return (AE_OK);
}