617 lines
20 KiB
C
617 lines
20 KiB
C
/******************************************************************************
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*
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* Module Name: nsrepair - Repair for objects returned by predefined methods
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2013, Intel Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#define __NSREPAIR_C__
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#include "acpi.h"
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#include "accommon.h"
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#include "acnamesp.h"
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#include "acinterp.h"
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#include "acpredef.h"
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#include "amlresrc.h"
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#define _COMPONENT ACPI_NAMESPACE
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ACPI_MODULE_NAME ("nsrepair")
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/*******************************************************************************
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*
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* This module attempts to repair or convert objects returned by the
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* predefined methods to an object type that is expected, as per the ACPI
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* specification. The need for this code is dictated by the many machines that
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* return incorrect types for the standard predefined methods. Performing these
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* conversions here, in one place, eliminates the need for individual ACPI
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* device drivers to do the same. Note: Most of these conversions are different
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* than the internal object conversion routines used for implicit object
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* conversion.
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*
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* The following conversions can be performed as necessary:
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*
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* Integer -> String
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* Integer -> Buffer
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* String -> Integer
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* String -> Buffer
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* Buffer -> Integer
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* Buffer -> String
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* Buffer -> Package of Integers
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* Package -> Package of one Package
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*
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* Additional conversions that are available:
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* Convert a null return or zero return value to an EndTag descriptor
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* Convert an ASCII string to a Unicode buffer
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*
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* An incorrect standalone object is wrapped with required outer package
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*
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* Additional possible repairs:
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* Required package elements that are NULL replaced by Integer/String/Buffer
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*
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******************************************************************************/
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/* Local prototypes */
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static const ACPI_SIMPLE_REPAIR_INFO *
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AcpiNsMatchSimpleRepair (
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ACPI_NAMESPACE_NODE *Node,
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UINT32 ReturnBtype,
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UINT32 PackageIndex);
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/*
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* Special but simple repairs for some names.
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*
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* 2nd argument: Unexpected types that can be repaired
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*/
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static const ACPI_SIMPLE_REPAIR_INFO AcpiObjectRepairInfo[] =
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{
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/* Resource descriptor conversions */
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{ "_CRS", ACPI_RTYPE_INTEGER | ACPI_RTYPE_STRING | ACPI_RTYPE_BUFFER | ACPI_RTYPE_NONE,
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ACPI_NOT_PACKAGE_ELEMENT,
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AcpiNsConvertToResource },
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{ "_DMA", ACPI_RTYPE_INTEGER | ACPI_RTYPE_STRING | ACPI_RTYPE_BUFFER | ACPI_RTYPE_NONE,
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ACPI_NOT_PACKAGE_ELEMENT,
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AcpiNsConvertToResource },
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{ "_PRS", ACPI_RTYPE_INTEGER | ACPI_RTYPE_STRING | ACPI_RTYPE_BUFFER | ACPI_RTYPE_NONE,
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ACPI_NOT_PACKAGE_ELEMENT,
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AcpiNsConvertToResource },
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/* Unicode conversions */
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{ "_MLS", ACPI_RTYPE_STRING, 1,
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AcpiNsConvertToUnicode },
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{ "_STR", ACPI_RTYPE_STRING | ACPI_RTYPE_BUFFER,
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ACPI_NOT_PACKAGE_ELEMENT,
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AcpiNsConvertToUnicode },
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{ {0,0,0,0}, 0, 0, NULL } /* Table terminator */
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};
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsSimpleRepair
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*
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* PARAMETERS: Data - Pointer to validation data structure
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* ExpectedBtypes - Object types expected
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* PackageIndex - Index of object within parent package (if
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* applicable - ACPI_NOT_PACKAGE_ELEMENT
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* otherwise)
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* ReturnObjectPtr - Pointer to the object returned from the
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* evaluation of a method or object
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*
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* RETURN: Status. AE_OK if repair was successful.
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*
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* DESCRIPTION: Attempt to repair/convert a return object of a type that was
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* not expected.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiNsSimpleRepair (
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ACPI_PREDEFINED_DATA *Data,
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UINT32 ExpectedBtypes,
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UINT32 PackageIndex,
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ACPI_OPERAND_OBJECT **ReturnObjectPtr)
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{
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ACPI_OPERAND_OBJECT *ReturnObject = *ReturnObjectPtr;
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ACPI_OPERAND_OBJECT *NewObject = NULL;
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ACPI_STATUS Status;
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const ACPI_SIMPLE_REPAIR_INFO *Predefined;
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ACPI_FUNCTION_NAME (NsSimpleRepair);
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/*
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* Special repairs for certain names that are in the repair table.
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* Check if this name is in the list of repairable names.
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*/
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Predefined = AcpiNsMatchSimpleRepair (Data->Node,
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Data->ReturnBtype, PackageIndex);
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if (Predefined)
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{
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if (!ReturnObject)
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{
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ACPI_WARN_PREDEFINED ((AE_INFO, Data->Pathname,
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ACPI_WARN_ALWAYS, "Missing expected return value"));
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}
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Status = Predefined->ObjectConverter (ReturnObject, &NewObject);
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if (ACPI_FAILURE (Status))
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{
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/* A fatal error occurred during a conversion */
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ACPI_EXCEPTION ((AE_INFO, Status,
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"During return object analysis"));
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return (Status);
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}
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if (NewObject)
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{
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goto ObjectRepaired;
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}
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}
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/*
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* Do not perform simple object repair unless the return type is not
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* expected.
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*/
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if (Data->ReturnBtype & ExpectedBtypes)
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{
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return (AE_OK);
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}
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/*
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* At this point, we know that the type of the returned object was not
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* one of the expected types for this predefined name. Attempt to
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* repair the object by converting it to one of the expected object
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* types for this predefined name.
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*/
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/*
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* If there is no return value, check if we require a return value for
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* this predefined name. Either one return value is expected, or none,
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* for both methods and other objects.
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*
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* Exit now if there is no return object. Warning if one was expected.
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*/
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if (!ReturnObject)
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{
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if (ExpectedBtypes && (!(ExpectedBtypes & ACPI_RTYPE_NONE)))
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{
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ACPI_WARN_PREDEFINED ((AE_INFO, Data->Pathname,
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ACPI_WARN_ALWAYS, "Missing expected return value"));
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return (AE_AML_NO_RETURN_VALUE);
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}
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}
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if (ExpectedBtypes & ACPI_RTYPE_INTEGER)
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{
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Status = AcpiNsConvertToInteger (ReturnObject, &NewObject);
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if (ACPI_SUCCESS (Status))
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{
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goto ObjectRepaired;
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}
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}
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if (ExpectedBtypes & ACPI_RTYPE_STRING)
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{
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Status = AcpiNsConvertToString (ReturnObject, &NewObject);
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if (ACPI_SUCCESS (Status))
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{
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goto ObjectRepaired;
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}
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}
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if (ExpectedBtypes & ACPI_RTYPE_BUFFER)
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{
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Status = AcpiNsConvertToBuffer (ReturnObject, &NewObject);
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if (ACPI_SUCCESS (Status))
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{
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goto ObjectRepaired;
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}
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}
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if (ExpectedBtypes & ACPI_RTYPE_PACKAGE)
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{
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/*
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* A package is expected. We will wrap the existing object with a
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* new package object. It is often the case that if a variable-length
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* package is required, but there is only a single object needed, the
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* BIOS will return that object instead of wrapping it with a Package
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* object. Note: after the wrapping, the package will be validated
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* for correct contents (expected object type or types).
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*/
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Status = AcpiNsWrapWithPackage (Data, ReturnObject, &NewObject);
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if (ACPI_SUCCESS (Status))
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{
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/*
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* The original object just had its reference count
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* incremented for being inserted into the new package.
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*/
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*ReturnObjectPtr = NewObject; /* New Package object */
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Data->Flags |= ACPI_OBJECT_REPAIRED;
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return (AE_OK);
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}
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}
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/* We cannot repair this object */
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return (AE_AML_OPERAND_TYPE);
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ObjectRepaired:
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/* Object was successfully repaired */
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if (PackageIndex != ACPI_NOT_PACKAGE_ELEMENT)
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{
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/*
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* The original object is a package element. We need to
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* decrement the reference count of the original object,
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* for removing it from the package.
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*
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* However, if the original object was just wrapped with a
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* package object as part of the repair, we don't need to
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* change the reference count.
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*/
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if (!(Data->Flags & ACPI_OBJECT_WRAPPED))
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{
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NewObject->Common.ReferenceCount =
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ReturnObject->Common.ReferenceCount;
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if (ReturnObject->Common.ReferenceCount > 1)
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{
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ReturnObject->Common.ReferenceCount--;
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}
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}
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ACPI_DEBUG_PRINT ((ACPI_DB_REPAIR,
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"%s: Converted %s to expected %s at Package index %u\n",
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Data->Pathname, AcpiUtGetObjectTypeName (ReturnObject),
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AcpiUtGetObjectTypeName (NewObject), PackageIndex));
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}
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else
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_REPAIR,
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"%s: Converted %s to expected %s\n",
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Data->Pathname, AcpiUtGetObjectTypeName (ReturnObject),
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AcpiUtGetObjectTypeName (NewObject)));
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}
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/* Delete old object, install the new return object */
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AcpiUtRemoveReference (ReturnObject);
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*ReturnObjectPtr = NewObject;
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Data->Flags |= ACPI_OBJECT_REPAIRED;
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return (AE_OK);
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}
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/******************************************************************************
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*
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* FUNCTION: AcpiNsMatchSimpleRepair
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*
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* PARAMETERS: Node - Namespace node for the method/object
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* ReturnBtype - Object type that was returned
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* PackageIndex - Index of object within parent package (if
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* applicable - ACPI_NOT_PACKAGE_ELEMENT
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* otherwise)
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*
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* RETURN: Pointer to entry in repair table. NULL indicates not found.
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*
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* DESCRIPTION: Check an object name against the repairable object list.
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*
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*****************************************************************************/
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static const ACPI_SIMPLE_REPAIR_INFO *
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AcpiNsMatchSimpleRepair (
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ACPI_NAMESPACE_NODE *Node,
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UINT32 ReturnBtype,
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UINT32 PackageIndex)
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{
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const ACPI_SIMPLE_REPAIR_INFO *ThisName;
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/* Search info table for a repairable predefined method/object name */
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ThisName = AcpiObjectRepairInfo;
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while (ThisName->ObjectConverter)
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{
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if (ACPI_COMPARE_NAME (Node->Name.Ascii, ThisName->Name))
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{
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/* Check if we can actually repair this name/type combination */
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if ((ReturnBtype & ThisName->UnexpectedBtypes) &&
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(PackageIndex == ThisName->PackageIndex))
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{
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return (ThisName);
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}
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return (NULL);
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}
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ThisName++;
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}
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return (NULL); /* Name was not found in the repair table */
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsRepairNullElement
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*
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* PARAMETERS: Data - Pointer to validation data structure
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* ExpectedBtypes - Object types expected
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* PackageIndex - Index of object within parent package (if
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* applicable - ACPI_NOT_PACKAGE_ELEMENT
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* otherwise)
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* ReturnObjectPtr - Pointer to the object returned from the
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* evaluation of a method or object
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*
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* RETURN: Status. AE_OK if repair was successful.
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*
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* DESCRIPTION: Attempt to repair a NULL element of a returned Package object.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiNsRepairNullElement (
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ACPI_PREDEFINED_DATA *Data,
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UINT32 ExpectedBtypes,
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UINT32 PackageIndex,
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ACPI_OPERAND_OBJECT **ReturnObjectPtr)
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{
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ACPI_OPERAND_OBJECT *ReturnObject = *ReturnObjectPtr;
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ACPI_OPERAND_OBJECT *NewObject;
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ACPI_FUNCTION_NAME (NsRepairNullElement);
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/* No repair needed if return object is non-NULL */
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if (ReturnObject)
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{
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return (AE_OK);
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}
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/*
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* Attempt to repair a NULL element of a Package object. This applies to
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* predefined names that return a fixed-length package and each element
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* is required. It does not apply to variable-length packages where NULL
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* elements are allowed, especially at the end of the package.
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*/
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if (ExpectedBtypes & ACPI_RTYPE_INTEGER)
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{
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/* Need an Integer - create a zero-value integer */
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NewObject = AcpiUtCreateIntegerObject ((UINT64) 0);
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}
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else if (ExpectedBtypes & ACPI_RTYPE_STRING)
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{
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/* Need a String - create a NULL string */
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NewObject = AcpiUtCreateStringObject (0);
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}
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else if (ExpectedBtypes & ACPI_RTYPE_BUFFER)
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{
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/* Need a Buffer - create a zero-length buffer */
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NewObject = AcpiUtCreateBufferObject (0);
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}
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else
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{
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/* Error for all other expected types */
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return (AE_AML_OPERAND_TYPE);
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}
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if (!NewObject)
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{
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return (AE_NO_MEMORY);
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}
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/* Set the reference count according to the parent Package object */
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NewObject->Common.ReferenceCount = Data->ParentPackage->Common.ReferenceCount;
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ACPI_DEBUG_PRINT ((ACPI_DB_REPAIR,
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"%s: Converted NULL package element to expected %s at index %u\n",
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Data->Pathname, AcpiUtGetObjectTypeName (NewObject), PackageIndex));
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*ReturnObjectPtr = NewObject;
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Data->Flags |= ACPI_OBJECT_REPAIRED;
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return (AE_OK);
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}
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/******************************************************************************
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*
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* FUNCTION: AcpiNsRemoveNullElements
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*
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* PARAMETERS: Data - Pointer to validation data structure
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* PackageType - An AcpiReturnPackageTypes value
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* ObjDesc - A Package object
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*
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* RETURN: None.
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*
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* DESCRIPTION: Remove all NULL package elements from packages that contain
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* a variable number of sub-packages. For these types of
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* packages, NULL elements can be safely removed.
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*
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*****************************************************************************/
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void
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AcpiNsRemoveNullElements (
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ACPI_PREDEFINED_DATA *Data,
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UINT8 PackageType,
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ACPI_OPERAND_OBJECT *ObjDesc)
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{
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ACPI_OPERAND_OBJECT **Source;
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ACPI_OPERAND_OBJECT **Dest;
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UINT32 Count;
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UINT32 NewCount;
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UINT32 i;
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ACPI_FUNCTION_NAME (NsRemoveNullElements);
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/*
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* We can safely remove all NULL elements from these package types:
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* PTYPE1_VAR packages contain a variable number of simple data types.
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* PTYPE2 packages contain a variable number of sub-packages.
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*/
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switch (PackageType)
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{
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case ACPI_PTYPE1_VAR:
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case ACPI_PTYPE2:
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case ACPI_PTYPE2_COUNT:
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case ACPI_PTYPE2_PKG_COUNT:
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case ACPI_PTYPE2_FIXED:
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case ACPI_PTYPE2_MIN:
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case ACPI_PTYPE2_REV_FIXED:
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case ACPI_PTYPE2_FIX_VAR:
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break;
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default:
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case ACPI_PTYPE1_FIXED:
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case ACPI_PTYPE1_OPTION:
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return;
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}
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Count = ObjDesc->Package.Count;
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NewCount = Count;
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Source = ObjDesc->Package.Elements;
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Dest = Source;
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/* Examine all elements of the package object, remove nulls */
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for (i = 0; i < Count; i++)
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{
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if (!*Source)
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{
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NewCount--;
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}
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else
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{
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*Dest = *Source;
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Dest++;
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}
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Source++;
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}
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/* Update parent package if any null elements were removed */
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if (NewCount < Count)
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_REPAIR,
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"%s: Found and removed %u NULL elements\n",
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Data->Pathname, (Count - NewCount)));
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/* NULL terminate list and update the package count */
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*Dest = NULL;
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ObjDesc->Package.Count = NewCount;
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsWrapWithPackage
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*
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* PARAMETERS: Data - Pointer to validation data structure
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* OriginalObject - Pointer to the object to repair.
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* ObjDescPtr - The new package object is returned here
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*
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* RETURN: Status, new object in *ObjDescPtr
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*
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* DESCRIPTION: Repair a common problem with objects that are defined to
|
|
* return a variable-length Package of sub-objects. If there is
|
|
* only one sub-object, some BIOS code mistakenly simply declares
|
|
* the single object instead of a Package with one sub-object.
|
|
* This function attempts to repair this error by wrapping a
|
|
* Package object around the original object, creating the
|
|
* correct and expected Package with one sub-object.
|
|
*
|
|
* Names that can be repaired in this manner include:
|
|
* _ALR, _CSD, _HPX, _MLS, _PLD, _PRT, _PSS, _TRT, _TSS,
|
|
* _BCL, _DOD, _FIX, _Sx
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiNsWrapWithPackage (
|
|
ACPI_PREDEFINED_DATA *Data,
|
|
ACPI_OPERAND_OBJECT *OriginalObject,
|
|
ACPI_OPERAND_OBJECT **ObjDescPtr)
|
|
{
|
|
ACPI_OPERAND_OBJECT *PkgObjDesc;
|
|
|
|
|
|
ACPI_FUNCTION_NAME (NsWrapWithPackage);
|
|
|
|
|
|
/*
|
|
* Create the new outer package and populate it. The new package will
|
|
* have a single element, the lone sub-object.
|
|
*/
|
|
PkgObjDesc = AcpiUtCreatePackageObject (1);
|
|
if (!PkgObjDesc)
|
|
{
|
|
return (AE_NO_MEMORY);
|
|
}
|
|
|
|
PkgObjDesc->Package.Elements[0] = OriginalObject;
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_REPAIR,
|
|
"%s: Wrapped %s with expected Package object\n",
|
|
Data->Pathname, AcpiUtGetObjectTypeName (OriginalObject)));
|
|
|
|
/* Return the new object in the object pointer */
|
|
|
|
*ObjDescPtr = PkgObjDesc;
|
|
Data->Flags |= ACPI_OBJECT_REPAIRED | ACPI_OBJECT_WRAPPED;
|
|
return (AE_OK);
|
|
}
|