314 lines
9.9 KiB
C
314 lines
9.9 KiB
C
/******************************************************************************
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*
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* Module Name: evxfregn - External Interfaces, ACPI Operation Regions and
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* Address Spaces.
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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 __EVXFREGN_C__
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#include <contrib/dev/acpica/include/acpi.h>
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#include <contrib/dev/acpica/include/accommon.h>
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#include <contrib/dev/acpica/include/acnamesp.h>
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#include <contrib/dev/acpica/include/acevents.h>
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#define _COMPONENT ACPI_EVENTS
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ACPI_MODULE_NAME ("evxfregn")
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/*******************************************************************************
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*
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* FUNCTION: AcpiInstallAddressSpaceHandler
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*
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* PARAMETERS: Device - Handle for the device
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* SpaceId - The address space ID
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* Handler - Address of the handler
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* Setup - Address of the setup function
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* Context - Value passed to the handler on each access
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*
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* RETURN: Status
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*
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* DESCRIPTION: Install a handler for all OpRegions of a given SpaceId.
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*
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* NOTE: This function should only be called after AcpiEnableSubsystem has
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* been called. This is because any _REG methods associated with the Space ID
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* are executed here, and these methods can only be safely executed after
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* the default handlers have been installed and the hardware has been
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* initialized (via AcpiEnableSubsystem.)
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiInstallAddressSpaceHandler (
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ACPI_HANDLE Device,
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ACPI_ADR_SPACE_TYPE SpaceId,
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ACPI_ADR_SPACE_HANDLER Handler,
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ACPI_ADR_SPACE_SETUP Setup,
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void *Context)
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{
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ACPI_NAMESPACE_NODE *Node;
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE (AcpiInstallAddressSpaceHandler);
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/* Parameter validation */
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if (!Device)
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{
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
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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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/* Convert and validate the device handle */
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Node = AcpiNsValidateHandle (Device);
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if (!Node)
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{
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Status = AE_BAD_PARAMETER;
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goto UnlockAndExit;
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}
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/* Install the handler for all Regions for this Space ID */
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Status = AcpiEvInstallSpaceHandler (Node, SpaceId, Handler, Setup, Context);
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if (ACPI_FAILURE (Status))
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{
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goto UnlockAndExit;
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}
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/*
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* For the default SpaceIDs, (the IDs for which there are default region handlers
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* installed) Only execute the _REG methods if the global initialization _REG
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* methods have already been run (via AcpiInitializeObjects). In other words,
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* we will defer the execution of the _REG methods for these SpaceIDs until
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* execution of AcpiInitializeObjects. This is done because we need the handlers
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* for the default spaces (mem/io/pci/table) to be installed before we can run
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* any control methods (or _REG methods). There is known BIOS code that depends
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* on this.
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*
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* For all other SpaceIDs, we can safely execute the _REG methods immediately.
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* This means that for IDs like EmbeddedController, this function should be called
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* only after AcpiEnableSubsystem has been called.
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*/
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switch (SpaceId)
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{
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case ACPI_ADR_SPACE_SYSTEM_MEMORY:
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case ACPI_ADR_SPACE_SYSTEM_IO:
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case ACPI_ADR_SPACE_PCI_CONFIG:
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case ACPI_ADR_SPACE_DATA_TABLE:
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if (!AcpiGbl_RegMethodsExecuted)
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{
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/* We will defer execution of the _REG methods for this space */
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goto UnlockAndExit;
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}
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break;
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default:
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break;
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}
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/* Run all _REG methods for this address space */
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Status = AcpiEvExecuteRegMethods (Node, SpaceId);
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UnlockAndExit:
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(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
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return_ACPI_STATUS (Status);
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}
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ACPI_EXPORT_SYMBOL (AcpiInstallAddressSpaceHandler)
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/*******************************************************************************
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*
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* FUNCTION: AcpiRemoveAddressSpaceHandler
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*
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* PARAMETERS: Device - Handle for the device
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* SpaceId - The address space ID
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* Handler - Address of the handler
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*
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* RETURN: Status
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*
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* DESCRIPTION: Remove a previously installed handler.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiRemoveAddressSpaceHandler (
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ACPI_HANDLE Device,
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ACPI_ADR_SPACE_TYPE SpaceId,
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ACPI_ADR_SPACE_HANDLER Handler)
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{
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ACPI_OPERAND_OBJECT *ObjDesc;
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ACPI_OPERAND_OBJECT *HandlerObj;
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ACPI_OPERAND_OBJECT *RegionObj;
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ACPI_OPERAND_OBJECT **LastObjPtr;
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ACPI_NAMESPACE_NODE *Node;
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE (AcpiRemoveAddressSpaceHandler);
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/* Parameter validation */
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if (!Device)
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{
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
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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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/* Convert and validate the device handle */
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Node = AcpiNsValidateHandle (Device);
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if (!Node ||
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((Node->Type != ACPI_TYPE_DEVICE) &&
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(Node->Type != ACPI_TYPE_PROCESSOR) &&
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(Node->Type != ACPI_TYPE_THERMAL) &&
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(Node != AcpiGbl_RootNode)))
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{
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Status = AE_BAD_PARAMETER;
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goto UnlockAndExit;
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}
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/* Make sure the internal object exists */
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ObjDesc = AcpiNsGetAttachedObject (Node);
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if (!ObjDesc)
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{
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Status = AE_NOT_EXIST;
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goto UnlockAndExit;
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}
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/* Find the address handler the user requested */
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HandlerObj = ObjDesc->Device.Handler;
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LastObjPtr = &ObjDesc->Device.Handler;
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while (HandlerObj)
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{
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/* We have a handler, see if user requested this one */
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if (HandlerObj->AddressSpace.SpaceId == SpaceId)
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{
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/* Handler must be the same as the installed handler */
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if (HandlerObj->AddressSpace.Handler != Handler)
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{
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Status = AE_BAD_PARAMETER;
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goto UnlockAndExit;
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}
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/* Matched SpaceId, first dereference this in the Regions */
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ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
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"Removing address handler %p(%p) for region %s "
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"on Device %p(%p)\n",
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HandlerObj, Handler, AcpiUtGetRegionName (SpaceId),
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Node, ObjDesc));
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RegionObj = HandlerObj->AddressSpace.RegionList;
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/* Walk the handler's region list */
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while (RegionObj)
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{
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/*
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* First disassociate the handler from the region.
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*
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* NOTE: this doesn't mean that the region goes away
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* The region is just inaccessible as indicated to
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* the _REG method
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*/
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AcpiEvDetachRegion (RegionObj, TRUE);
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/*
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* Walk the list: Just grab the head because the
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* DetachRegion removed the previous head.
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*/
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RegionObj = HandlerObj->AddressSpace.RegionList;
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}
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/* Remove this Handler object from the list */
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*LastObjPtr = HandlerObj->AddressSpace.Next;
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/* Now we can delete the handler object */
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AcpiUtRemoveReference (HandlerObj);
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goto UnlockAndExit;
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}
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/* Walk the linked list of handlers */
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LastObjPtr = &HandlerObj->AddressSpace.Next;
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HandlerObj = HandlerObj->AddressSpace.Next;
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}
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/* The handler does not exist */
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ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
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"Unable to remove address handler %p for %s(%X), DevNode %p, obj %p\n",
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Handler, AcpiUtGetRegionName (SpaceId), SpaceId, Node, ObjDesc));
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Status = AE_NOT_EXIST;
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UnlockAndExit:
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(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
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return_ACPI_STATUS (Status);
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}
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ACPI_EXPORT_SYMBOL (AcpiRemoveAddressSpaceHandler)
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