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623 lines
18 KiB
C
623 lines
18 KiB
C
/******************************************************************************
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*
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* Module Name: exconfig - Namespace reconfiguration (Load/Unload opcodes)
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2021, 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 MERCHANTABILITY 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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#include "acpi.h"
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#include "accommon.h"
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#include "acinterp.h"
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#include "acnamesp.h"
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#include "actables.h"
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#include "acdispat.h"
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#include "acevents.h"
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#include "amlcode.h"
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#define _COMPONENT ACPI_EXECUTER
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ACPI_MODULE_NAME ("exconfig")
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/* Local prototypes */
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static ACPI_STATUS
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AcpiExAddTable (
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UINT32 TableIndex,
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ACPI_OPERAND_OBJECT **DdbHandle);
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static ACPI_STATUS
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AcpiExRegionRead (
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ACPI_OPERAND_OBJECT *ObjDesc,
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UINT32 Length,
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UINT8 *Buffer);
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/*******************************************************************************
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*
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* FUNCTION: AcpiExAddTable
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*
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* PARAMETERS: Table - Pointer to raw table
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* ParentNode - Where to load the table (scope)
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* DdbHandle - Where to return the table handle.
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*
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* RETURN: Status
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*
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* DESCRIPTION: Common function to Install and Load an ACPI table with a
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* returned table handle.
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*
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******************************************************************************/
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static ACPI_STATUS
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AcpiExAddTable (
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UINT32 TableIndex,
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ACPI_OPERAND_OBJECT **DdbHandle)
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{
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ACPI_OPERAND_OBJECT *ObjDesc;
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ACPI_FUNCTION_TRACE (ExAddTable);
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/* Create an object to be the table handle */
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ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_LOCAL_REFERENCE);
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if (!ObjDesc)
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{
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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/* Init the table handle */
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ObjDesc->Common.Flags |= AOPOBJ_DATA_VALID;
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ObjDesc->Reference.Class = ACPI_REFCLASS_TABLE;
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ObjDesc->Reference.Value = TableIndex;
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*DdbHandle = ObjDesc;
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return_ACPI_STATUS (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiExLoadTableOp
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*
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* PARAMETERS: WalkState - Current state with operands
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* ReturnDesc - Where to store the return object
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*
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* RETURN: Status
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*
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* DESCRIPTION: Load an ACPI table from the RSDT/XSDT
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExLoadTableOp (
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ACPI_WALK_STATE *WalkState,
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ACPI_OPERAND_OBJECT **ReturnDesc)
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{
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ACPI_STATUS Status;
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ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0];
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ACPI_NAMESPACE_NODE *ParentNode;
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ACPI_NAMESPACE_NODE *StartNode;
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ACPI_NAMESPACE_NODE *ParameterNode = NULL;
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ACPI_OPERAND_OBJECT *DdbHandle;
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UINT32 TableIndex;
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ACPI_FUNCTION_TRACE (ExLoadTableOp);
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/* Find the ACPI table in the RSDT/XSDT */
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AcpiExExitInterpreter ();
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Status = AcpiTbFindTable (
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Operand[0]->String.Pointer,
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Operand[1]->String.Pointer,
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Operand[2]->String.Pointer, &TableIndex);
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AcpiExEnterInterpreter ();
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if (ACPI_FAILURE (Status))
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{
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if (Status != AE_NOT_FOUND)
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{
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return_ACPI_STATUS (Status);
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}
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/* Table not found, return an Integer=0 and AE_OK */
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DdbHandle = AcpiUtCreateIntegerObject ((UINT64) 0);
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if (!DdbHandle)
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{
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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*ReturnDesc = DdbHandle;
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return_ACPI_STATUS (AE_OK);
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}
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/* Default nodes */
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StartNode = WalkState->ScopeInfo->Scope.Node;
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ParentNode = AcpiGbl_RootNode;
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/* RootPath (optional parameter) */
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if (Operand[3]->String.Length > 0)
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{
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/*
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* Find the node referenced by the RootPathString. This is the
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* location within the namespace where the table will be loaded.
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*/
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Status = AcpiNsGetNodeUnlocked (StartNode,
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Operand[3]->String.Pointer, ACPI_NS_SEARCH_PARENT,
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&ParentNode);
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if (ACPI_FAILURE (Status))
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{
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return_ACPI_STATUS (Status);
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}
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}
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/* ParameterPath (optional parameter) */
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if (Operand[4]->String.Length > 0)
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{
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if ((Operand[4]->String.Pointer[0] != AML_ROOT_PREFIX) &&
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(Operand[4]->String.Pointer[0] != AML_PARENT_PREFIX))
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{
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/*
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* Path is not absolute, so it will be relative to the node
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* referenced by the RootPathString (or the NS root if omitted)
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*/
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StartNode = ParentNode;
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}
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/* Find the node referenced by the ParameterPathString */
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Status = AcpiNsGetNodeUnlocked (StartNode,
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Operand[4]->String.Pointer, ACPI_NS_SEARCH_PARENT,
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&ParameterNode);
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if (ACPI_FAILURE (Status))
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{
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return_ACPI_STATUS (Status);
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}
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}
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/* Load the table into the namespace */
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ACPI_INFO (("Dynamic OEM Table Load:"));
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AcpiExExitInterpreter ();
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Status = AcpiTbLoadTable (TableIndex, ParentNode);
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AcpiExEnterInterpreter ();
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if (ACPI_FAILURE (Status))
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{
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return_ACPI_STATUS (Status);
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}
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Status = AcpiExAddTable (TableIndex, &DdbHandle);
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if (ACPI_FAILURE (Status))
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{
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return_ACPI_STATUS (Status);
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}
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/* Complete the initialization/resolution of new objects */
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AcpiExExitInterpreter();
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AcpiNsInitializeObjects();
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AcpiExEnterInterpreter();
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/* Parameter Data (optional) */
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if (ParameterNode)
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{
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/* Store the parameter data into the optional parameter object */
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Status = AcpiExStore (Operand[5],
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ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, ParameterNode), WalkState);
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if (ACPI_FAILURE (Status))
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{
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(void) AcpiExUnloadTable (DdbHandle);
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AcpiUtRemoveReference (DdbHandle);
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return_ACPI_STATUS (Status);
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}
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}
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*ReturnDesc = DdbHandle;
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return_ACPI_STATUS (Status);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiExRegionRead
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*
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* PARAMETERS: ObjDesc - Region descriptor
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* Length - Number of bytes to read
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* Buffer - Pointer to where to put the data
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*
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* RETURN: Status
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*
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* DESCRIPTION: Read data from an operation region. The read starts from the
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* beginning of the region.
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*
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******************************************************************************/
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static ACPI_STATUS
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AcpiExRegionRead (
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ACPI_OPERAND_OBJECT *ObjDesc,
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UINT32 Length,
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UINT8 *Buffer)
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{
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ACPI_STATUS Status;
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UINT64 Value;
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UINT32 RegionOffset = 0;
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UINT32 i;
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/* Bytewise reads */
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for (i = 0; i < Length; i++)
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{
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Status = AcpiEvAddressSpaceDispatch (ObjDesc, NULL, ACPI_READ,
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RegionOffset, 8, &Value);
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if (ACPI_FAILURE (Status))
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{
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return (Status);
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}
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*Buffer = (UINT8) Value;
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Buffer++;
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RegionOffset++;
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}
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiExLoadOp
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*
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* PARAMETERS: ObjDesc - Region or Buffer/Field where the table will be
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* obtained
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* Target - Where a handle to the table will be stored
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* WalkState - Current state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Load an ACPI table from a field or operation region
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*
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* NOTE: Region Fields (Field, BankField, IndexFields) are resolved to buffer
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* objects before this code is reached.
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*
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* If source is an operation region, it must refer to SystemMemory, as
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* per the ACPI specification.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExLoadOp (
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ACPI_OPERAND_OBJECT *ObjDesc,
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ACPI_OPERAND_OBJECT *Target,
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ACPI_WALK_STATE *WalkState)
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{
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ACPI_OPERAND_OBJECT *DdbHandle;
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ACPI_TABLE_HEADER *TableHeader;
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ACPI_TABLE_HEADER *Table;
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UINT32 TableIndex;
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ACPI_STATUS Status;
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UINT32 Length;
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ACPI_FUNCTION_TRACE (ExLoadOp);
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/* Source Object can be either an OpRegion or a Buffer/Field */
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switch (ObjDesc->Common.Type)
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{
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case ACPI_TYPE_REGION:
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
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"Load table from Region %p\n", ObjDesc));
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/* Region must be SystemMemory (from ACPI spec) */
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if (ObjDesc->Region.SpaceId != ACPI_ADR_SPACE_SYSTEM_MEMORY)
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{
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return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
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}
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/*
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* If the Region Address and Length have not been previously
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* evaluated, evaluate them now and save the results.
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*/
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if (!(ObjDesc->Common.Flags & AOPOBJ_DATA_VALID))
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{
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Status = AcpiDsGetRegionArguments (ObjDesc);
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if (ACPI_FAILURE (Status))
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{
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return_ACPI_STATUS (Status);
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}
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}
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/* Get the table header first so we can get the table length */
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TableHeader = ACPI_ALLOCATE (sizeof (ACPI_TABLE_HEADER));
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if (!TableHeader)
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{
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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Status = AcpiExRegionRead (ObjDesc, sizeof (ACPI_TABLE_HEADER),
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ACPI_CAST_PTR (UINT8, TableHeader));
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Length = TableHeader->Length;
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ACPI_FREE (TableHeader);
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if (ACPI_FAILURE (Status))
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{
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return_ACPI_STATUS (Status);
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}
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/* Must have at least an ACPI table header */
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if (Length < sizeof (ACPI_TABLE_HEADER))
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{
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return_ACPI_STATUS (AE_INVALID_TABLE_LENGTH);
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}
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/*
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* The original implementation simply mapped the table, with no copy.
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* However, the memory region is not guaranteed to remain stable and
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* we must copy the table to a local buffer. For example, the memory
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* region is corrupted after suspend on some machines. Dynamically
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* loaded tables are usually small, so this overhead is minimal.
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*
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* The latest implementation (5/2009) does not use a mapping at all.
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* We use the low-level operation region interface to read the table
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* instead of the obvious optimization of using a direct mapping.
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* This maintains a consistent use of operation regions across the
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* entire subsystem. This is important if additional processing must
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* be performed in the (possibly user-installed) operation region
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* handler. For example, AcpiExec and ASLTS depend on this.
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*/
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/* Allocate a buffer for the table */
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Table = ACPI_ALLOCATE (Length);
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if (!Table)
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{
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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/* Read the entire table */
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Status = AcpiExRegionRead (ObjDesc, Length,
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ACPI_CAST_PTR (UINT8, Table));
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if (ACPI_FAILURE (Status))
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{
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ACPI_FREE (Table);
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return_ACPI_STATUS (Status);
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}
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break;
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case ACPI_TYPE_BUFFER: /* Buffer or resolved RegionField */
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
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"Load table from Buffer or Field %p\n", ObjDesc));
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/* Must have at least an ACPI table header */
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if (ObjDesc->Buffer.Length < sizeof (ACPI_TABLE_HEADER))
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{
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return_ACPI_STATUS (AE_INVALID_TABLE_LENGTH);
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}
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/* Get the actual table length from the table header */
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TableHeader = ACPI_CAST_PTR (
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ACPI_TABLE_HEADER, ObjDesc->Buffer.Pointer);
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Length = TableHeader->Length;
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/* Table cannot extend beyond the buffer */
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if (Length > ObjDesc->Buffer.Length)
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{
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return_ACPI_STATUS (AE_AML_BUFFER_LIMIT);
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}
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if (Length < sizeof (ACPI_TABLE_HEADER))
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{
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return_ACPI_STATUS (AE_INVALID_TABLE_LENGTH);
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}
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/*
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* Copy the table from the buffer because the buffer could be
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* modified or even deleted in the future
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*/
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Table = ACPI_ALLOCATE (Length);
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if (!Table)
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{
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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memcpy (Table, TableHeader, Length);
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break;
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default:
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return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
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}
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/* Install the new table into the local data structures */
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ACPI_INFO (("Dynamic OEM Table Load:"));
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AcpiExExitInterpreter ();
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Status = AcpiTbInstallAndLoadTable (ACPI_PTR_TO_PHYSADDR (Table),
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ACPI_TABLE_ORIGIN_INTERNAL_VIRTUAL, TRUE, &TableIndex);
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AcpiExEnterInterpreter ();
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if (ACPI_FAILURE (Status))
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{
|
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/* Delete allocated table buffer */
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ACPI_FREE (Table);
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return_ACPI_STATUS (Status);
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}
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/*
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* Add the table to the namespace.
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*
|
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* Note: Load the table objects relative to the root of the namespace.
|
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* This appears to go against the ACPI specification, but we do it for
|
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* compatibility with other ACPI implementations.
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*/
|
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Status = AcpiExAddTable (TableIndex, &DdbHandle);
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if (ACPI_FAILURE (Status))
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{
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/* On error, TablePtr was deallocated above */
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return_ACPI_STATUS (Status);
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}
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|
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/* Complete the initialization/resolution of new objects */
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AcpiExExitInterpreter ();
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AcpiNsInitializeObjects ();
|
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AcpiExEnterInterpreter ();
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/* Store the DdbHandle into the Target operand */
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Status = AcpiExStore (DdbHandle, Target, WalkState);
|
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if (ACPI_FAILURE (Status))
|
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{
|
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(void) AcpiExUnloadTable (DdbHandle);
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|
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/* TablePtr was deallocated above */
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|
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AcpiUtRemoveReference (DdbHandle);
|
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return_ACPI_STATUS (Status);
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}
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/* Remove the reference by added by AcpiExStore above */
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|
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AcpiUtRemoveReference (DdbHandle);
|
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return_ACPI_STATUS (Status);
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}
|
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|
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|
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/*******************************************************************************
|
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*
|
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* FUNCTION: AcpiExUnloadTable
|
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*
|
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* PARAMETERS: DdbHandle - Handle to a previously loaded table
|
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*
|
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* RETURN: Status
|
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*
|
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* DESCRIPTION: Unload an ACPI table
|
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*
|
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******************************************************************************/
|
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|
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ACPI_STATUS
|
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AcpiExUnloadTable (
|
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ACPI_OPERAND_OBJECT *DdbHandle)
|
|
{
|
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ACPI_STATUS Status = AE_OK;
|
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ACPI_OPERAND_OBJECT *TableDesc = DdbHandle;
|
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UINT32 TableIndex;
|
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|
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|
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ACPI_FUNCTION_TRACE (ExUnloadTable);
|
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|
|
|
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/*
|
|
* Temporarily emit a warning so that the ASL for the machine can be
|
|
* hopefully obtained. This is to say that the Unload() operator is
|
|
* extremely rare if not completely unused.
|
|
*/
|
|
ACPI_WARNING ((AE_INFO,
|
|
"Received request to unload an ACPI table"));
|
|
|
|
/*
|
|
* May 2018: Unload is no longer supported for the following reasons:
|
|
* 1) A correct implementation on some hosts may not be possible.
|
|
* 2) Other ACPI implementations do not correctly/fully support it.
|
|
* 3) It requires host device driver support which does not exist.
|
|
* (To properly support namespace unload out from underneath.)
|
|
* 4) This AML operator has never been seen in the field.
|
|
*/
|
|
ACPI_EXCEPTION ((AE_INFO, AE_NOT_IMPLEMENTED,
|
|
"AML Unload operator is not supported"));
|
|
|
|
/*
|
|
* Validate the handle
|
|
* Although the handle is partially validated in AcpiExReconfiguration()
|
|
* when it calls AcpiExResolveOperands(), the handle is more completely
|
|
* validated here.
|
|
*
|
|
* Handle must be a valid operand object of type reference. Also, the
|
|
* DdbHandle must still be marked valid (table has not been previously
|
|
* unloaded)
|
|
*/
|
|
if ((!DdbHandle) ||
|
|
(ACPI_GET_DESCRIPTOR_TYPE (DdbHandle) != ACPI_DESC_TYPE_OPERAND) ||
|
|
(DdbHandle->Common.Type != ACPI_TYPE_LOCAL_REFERENCE) ||
|
|
(!(DdbHandle->Common.Flags & AOPOBJ_DATA_VALID)))
|
|
{
|
|
return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
|
|
}
|
|
|
|
/* Get the table index from the DdbHandle */
|
|
|
|
TableIndex = TableDesc->Reference.Value;
|
|
|
|
/*
|
|
* Release the interpreter lock so that the table lock won't have
|
|
* strict order requirement against it.
|
|
*/
|
|
AcpiExExitInterpreter ();
|
|
Status = AcpiTbUnloadTable (TableIndex);
|
|
AcpiExEnterInterpreter ();
|
|
|
|
/*
|
|
* Invalidate the handle. We do this because the handle may be stored
|
|
* in a named object and may not be actually deleted until much later.
|
|
*/
|
|
if (ACPI_SUCCESS (Status))
|
|
{
|
|
DdbHandle->Common.Flags &= ~AOPOBJ_DATA_VALID;
|
|
}
|
|
return_ACPI_STATUS (Status);
|
|
}
|