/****************************************************************************** * * Module Name: nsrepair - Repair for objects returned by predefined methods * *****************************************************************************/ /****************************************************************************** * * 1. Copyright Notice * * Some or all of this work - Copyright (c) 1999 - 2018, 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. * ***************************************************************************** * * Alternatively, you may choose to be licensed under the terms of the * following license: * * 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. * * 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 MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * 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 DAMAGE. * * Alternatively, you may choose to be licensed under the terms of the * GNU General Public License ("GPL") version 2 as published by the Free * Software Foundation. * *****************************************************************************/ #include "acpi.h" #include "accommon.h" #include "acnamesp.h" #include "acinterp.h" #include "acpredef.h" #include "amlresrc.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 conversions that are available: * Convert a null return or zero return value to an EndTag descriptor * Convert an ASCII string to a Unicode buffer * * An incorrect standalone object is wrapped with required outer package * * Additional possible repairs: * Required package elements that are NULL replaced by Integer/String/Buffer * ******************************************************************************/ /* Local prototypes */ static const ACPI_SIMPLE_REPAIR_INFO * AcpiNsMatchSimpleRepair ( ACPI_NAMESPACE_NODE *Node, UINT32 ReturnBtype, UINT32 PackageIndex); /* * Special but simple repairs for some names. * * 2nd argument: Unexpected types that can be repaired */ static const ACPI_SIMPLE_REPAIR_INFO AcpiObjectRepairInfo[] = { /* Resource descriptor conversions */ { "_CRS", ACPI_RTYPE_INTEGER | ACPI_RTYPE_STRING | ACPI_RTYPE_BUFFER | ACPI_RTYPE_NONE, ACPI_NOT_PACKAGE_ELEMENT, AcpiNsConvertToResource }, { "_DMA", ACPI_RTYPE_INTEGER | ACPI_RTYPE_STRING | ACPI_RTYPE_BUFFER | ACPI_RTYPE_NONE, ACPI_NOT_PACKAGE_ELEMENT, AcpiNsConvertToResource }, { "_PRS", ACPI_RTYPE_INTEGER | ACPI_RTYPE_STRING | ACPI_RTYPE_BUFFER | ACPI_RTYPE_NONE, ACPI_NOT_PACKAGE_ELEMENT, AcpiNsConvertToResource }, /* Object reference conversions */ { "_DEP", ACPI_RTYPE_STRING, ACPI_ALL_PACKAGE_ELEMENTS, AcpiNsConvertToReference }, /* Unicode conversions */ { "_MLS", ACPI_RTYPE_STRING, 1, AcpiNsConvertToUnicode }, { "_STR", ACPI_RTYPE_STRING | ACPI_RTYPE_BUFFER, ACPI_NOT_PACKAGE_ELEMENT, AcpiNsConvertToUnicode }, { {0,0,0,0}, 0, 0, NULL } /* Table terminator */ }; /******************************************************************************* * * FUNCTION: AcpiNsSimpleRepair * * PARAMETERS: Info - Method execution information block * 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 AcpiNsSimpleRepair ( ACPI_EVALUATE_INFO *Info, UINT32 ExpectedBtypes, UINT32 PackageIndex, ACPI_OPERAND_OBJECT **ReturnObjectPtr) { ACPI_OPERAND_OBJECT *ReturnObject = *ReturnObjectPtr; ACPI_OPERAND_OBJECT *NewObject = NULL; ACPI_STATUS Status; const ACPI_SIMPLE_REPAIR_INFO *Predefined; ACPI_FUNCTION_NAME (NsSimpleRepair); /* * Special repairs for certain names that are in the repair table. * Check if this name is in the list of repairable names. */ Predefined = AcpiNsMatchSimpleRepair (Info->Node, Info->ReturnBtype, PackageIndex); if (Predefined) { if (!ReturnObject) { ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, ACPI_WARN_ALWAYS, "Missing expected return value")); } Status = Predefined->ObjectConverter (Info->Node, ReturnObject, &NewObject); if (ACPI_FAILURE (Status)) { /* A fatal error occurred during a conversion */ ACPI_EXCEPTION ((AE_INFO, Status, "During return object analysis")); return (Status); } if (NewObject) { goto ObjectRepaired; } } /* * Do not perform simple object repair unless the return type is not * expected. */ if (Info->ReturnBtype & ExpectedBtypes) { return (AE_OK); } /* * 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 there is no return value, check if we require a return value for * this predefined name. Either one return value is expected, or none, * for both methods and other objects. * * Try to fix if there was no return object. Warning if failed to fix. */ if (!ReturnObject) { if (ExpectedBtypes && (!(ExpectedBtypes & ACPI_RTYPE_NONE))) { if (PackageIndex != ACPI_NOT_PACKAGE_ELEMENT) { ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, ACPI_WARN_ALWAYS, "Found unexpected NULL package element")); Status = AcpiNsRepairNullElement (Info, ExpectedBtypes, PackageIndex, ReturnObjectPtr); if (ACPI_SUCCESS (Status)) { return (AE_OK); /* Repair was successful */ } } else { ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, ACPI_WARN_ALWAYS, "Missing expected return value")); } return (AE_AML_NO_RETURN_VALUE); } } 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) { /* * A package is expected. We will wrap the existing object with a * new package object. It is often the case that if a variable-length * package is required, but there is only a single object needed, the * BIOS will return that object instead of wrapping it with a Package * object. Note: after the wrapping, the package will be validated * for correct contents (expected object type or types). */ Status = AcpiNsWrapWithPackage (Info, ReturnObject, &NewObject); if (ACPI_SUCCESS (Status)) { /* * The original object just had its reference count * incremented for being inserted into the new package. */ *ReturnObjectPtr = NewObject; /* New Package object */ Info->ReturnFlags |= ACPI_OBJECT_REPAIRED; return (AE_OK); } } /* We cannot repair this object */ return (AE_AML_OPERAND_TYPE); ObjectRepaired: /* Object was successfully repaired */ if (PackageIndex != ACPI_NOT_PACKAGE_ELEMENT) { /* Update reference count of new object */ if (!(Info->ReturnFlags & ACPI_OBJECT_WRAPPED)) { NewObject->Common.ReferenceCount = ReturnObject->Common.ReferenceCount; } ACPI_DEBUG_PRINT ((ACPI_DB_REPAIR, "%s: Converted %s to expected %s at Package index %u\n", Info->FullPathname, AcpiUtGetObjectTypeName (ReturnObject), AcpiUtGetObjectTypeName (NewObject), PackageIndex)); } else { ACPI_DEBUG_PRINT ((ACPI_DB_REPAIR, "%s: Converted %s to expected %s\n", Info->FullPathname, AcpiUtGetObjectTypeName (ReturnObject), AcpiUtGetObjectTypeName (NewObject))); } /* Delete old object, install the new return object */ AcpiUtRemoveReference (ReturnObject); *ReturnObjectPtr = NewObject; Info->ReturnFlags |= ACPI_OBJECT_REPAIRED; return (AE_OK); } /****************************************************************************** * * FUNCTION: AcpiNsMatchSimpleRepair * * PARAMETERS: Node - Namespace node for the method/object * ReturnBtype - Object type that was returned * PackageIndex - Index of object within parent package (if * applicable - ACPI_NOT_PACKAGE_ELEMENT * otherwise) * * RETURN: Pointer to entry in repair table. NULL indicates not found. * * DESCRIPTION: Check an object name against the repairable object list. * *****************************************************************************/ static const ACPI_SIMPLE_REPAIR_INFO * AcpiNsMatchSimpleRepair ( ACPI_NAMESPACE_NODE *Node, UINT32 ReturnBtype, UINT32 PackageIndex) { const ACPI_SIMPLE_REPAIR_INFO *ThisName; /* Search info table for a repairable predefined method/object name */ ThisName = AcpiObjectRepairInfo; while (ThisName->ObjectConverter) { if (ACPI_COMPARE_NAME (Node->Name.Ascii, ThisName->Name)) { /* Check if we can actually repair this name/type combination */ if ((ReturnBtype & ThisName->UnexpectedBtypes) && (ThisName->PackageIndex == ACPI_ALL_PACKAGE_ELEMENTS || PackageIndex == ThisName->PackageIndex)) { return (ThisName); } return (NULL); } ThisName++; } return (NULL); /* Name was not found in the repair table */ } /******************************************************************************* * * FUNCTION: AcpiNsRepairNullElement * * PARAMETERS: Info - Method execution information block * 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_EVALUATE_INFO *Info, 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 = Info->ParentPackage->Common.ReferenceCount; ACPI_DEBUG_PRINT ((ACPI_DB_REPAIR, "%s: Converted NULL package element to expected %s at index %u\n", Info->FullPathname, AcpiUtGetObjectTypeName (NewObject), PackageIndex)); *ReturnObjectPtr = NewObject; Info->ReturnFlags |= ACPI_OBJECT_REPAIRED; return (AE_OK); } /****************************************************************************** * * FUNCTION: AcpiNsRemoveNullElements * * PARAMETERS: Info - Method execution information block * PackageType - An AcpiReturnPackageTypes value * ObjDesc - A Package object * * RETURN: None. * * DESCRIPTION: Remove all NULL package elements from packages that contain * a variable number of subpackages. For these types of * packages, NULL elements can be safely removed. * *****************************************************************************/ void AcpiNsRemoveNullElements ( ACPI_EVALUATE_INFO *Info, 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 subpackages. */ 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: case ACPI_PTYPE2_FIX_VAR: break; default: case ACPI_PTYPE2_VAR_VAR: 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", Info->FullPathname, (Count - NewCount))); /* NULL terminate list and update the package count */ *Dest = NULL; ObjDesc->Package.Count = NewCount; } } /******************************************************************************* * * FUNCTION: AcpiNsWrapWithPackage * * PARAMETERS: Info - Method execution information block * OriginalObject - Pointer to the object to repair. * ObjDescPtr - The new package object is returned here * * RETURN: Status, new object in *ObjDescPtr * * 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_EVALUATE_INFO *Info, 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", Info->FullPathname, AcpiUtGetObjectTypeName (OriginalObject))); /* Return the new object in the object pointer */ *ObjDescPtr = PkgObjDesc; Info->ReturnFlags |= ACPI_OBJECT_REPAIRED | ACPI_OBJECT_WRAPPED; return (AE_OK); }