| /****************************************************************************** |
| * |
| * Module Name: evxfregn - External Interfaces, ACPI Operation Regions and |
| * Address Spaces. |
| * |
| *****************************************************************************/ |
| |
| /* |
| * Copyright (C) 2000 - 2016, Intel Corp. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions, and the following disclaimer, |
| * without modification. |
| * 2. Redistributions in binary form must reproduce at minimum a disclaimer |
| * substantially similar to the "NO WARRANTY" disclaimer below |
| * ("Disclaimer") and any redistribution must be conditioned upon |
| * including a substantially similar Disclaimer requirement for further |
| * binary redistribution. |
| * 3. Neither the names of the above-listed copyright holders nor the names |
| * of any contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * Alternatively, this software may be distributed under the terms of the |
| * GNU General Public License ("GPL") version 2 as published by the Free |
| * Software Foundation. |
| * |
| * NO WARRANTY |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
| * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| * POSSIBILITY OF SUCH DAMAGES. |
| */ |
| |
| #define EXPORT_ACPI_INTERFACES |
| |
| #include "acpi.h" |
| #include "accommon.h" |
| #include "acnamesp.h" |
| #include "acevents.h" |
| |
| #define _COMPONENT ACPI_EVENTS |
| ACPI_MODULE_NAME ("evxfregn") |
| |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: AcpiInstallAddressSpaceHandler |
| * |
| * PARAMETERS: Device - Handle for the device |
| * SpaceId - The address space ID |
| * Handler - Address of the handler |
| * Setup - Address of the setup function |
| * Context - Value passed to the handler on each access |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Install a handler for all OpRegions of a given SpaceId. |
| * |
| * NOTE: This function should only be called after AcpiEnableSubsystem has |
| * been called. This is because any _REG methods associated with the Space ID |
| * are executed here, and these methods can only be safely executed after |
| * the default handlers have been installed and the hardware has been |
| * initialized (via AcpiEnableSubsystem.) |
| * |
| ******************************************************************************/ |
| |
| ACPI_STATUS |
| AcpiInstallAddressSpaceHandler ( |
| ACPI_HANDLE Device, |
| ACPI_ADR_SPACE_TYPE SpaceId, |
| ACPI_ADR_SPACE_HANDLER Handler, |
| ACPI_ADR_SPACE_SETUP Setup, |
| void *Context) |
| { |
| ACPI_NAMESPACE_NODE *Node; |
| ACPI_STATUS Status; |
| |
| |
| ACPI_FUNCTION_TRACE (AcpiInstallAddressSpaceHandler); |
| |
| |
| /* Parameter validation */ |
| |
| if (!Device) |
| { |
| return_ACPI_STATUS (AE_BAD_PARAMETER); |
| } |
| |
| Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); |
| if (ACPI_FAILURE (Status)) |
| { |
| return_ACPI_STATUS (Status); |
| } |
| |
| /* Convert and validate the device handle */ |
| |
| Node = AcpiNsValidateHandle (Device); |
| if (!Node) |
| { |
| Status = AE_BAD_PARAMETER; |
| goto UnlockAndExit; |
| } |
| |
| /* Install the handler for all Regions for this Space ID */ |
| |
| Status = AcpiEvInstallSpaceHandler ( |
| Node, SpaceId, Handler, Setup, Context); |
| if (ACPI_FAILURE (Status)) |
| { |
| goto UnlockAndExit; |
| } |
| |
| /* Run all _REG methods for this address space */ |
| |
| AcpiEvExecuteRegMethods (Node, SpaceId, ACPI_REG_CONNECT); |
| |
| |
| UnlockAndExit: |
| (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); |
| return_ACPI_STATUS (Status); |
| } |
| |
| ACPI_EXPORT_SYMBOL (AcpiInstallAddressSpaceHandler) |
| |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: AcpiRemoveAddressSpaceHandler |
| * |
| * PARAMETERS: Device - Handle for the device |
| * SpaceId - The address space ID |
| * Handler - Address of the handler |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Remove a previously installed handler. |
| * |
| ******************************************************************************/ |
| |
| ACPI_STATUS |
| AcpiRemoveAddressSpaceHandler ( |
| ACPI_HANDLE Device, |
| ACPI_ADR_SPACE_TYPE SpaceId, |
| ACPI_ADR_SPACE_HANDLER Handler) |
| { |
| ACPI_OPERAND_OBJECT *ObjDesc; |
| ACPI_OPERAND_OBJECT *HandlerObj; |
| ACPI_OPERAND_OBJECT *RegionObj; |
| ACPI_OPERAND_OBJECT **LastObjPtr; |
| ACPI_NAMESPACE_NODE *Node; |
| ACPI_STATUS Status; |
| |
| |
| ACPI_FUNCTION_TRACE (AcpiRemoveAddressSpaceHandler); |
| |
| |
| /* Parameter validation */ |
| |
| if (!Device) |
| { |
| return_ACPI_STATUS (AE_BAD_PARAMETER); |
| } |
| |
| Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); |
| if (ACPI_FAILURE (Status)) |
| { |
| return_ACPI_STATUS (Status); |
| } |
| |
| /* Convert and validate the device handle */ |
| |
| Node = AcpiNsValidateHandle (Device); |
| if (!Node || |
| ((Node->Type != ACPI_TYPE_DEVICE) && |
| (Node->Type != ACPI_TYPE_PROCESSOR) && |
| (Node->Type != ACPI_TYPE_THERMAL) && |
| (Node != AcpiGbl_RootNode))) |
| { |
| Status = AE_BAD_PARAMETER; |
| goto UnlockAndExit; |
| } |
| |
| /* Make sure the internal object exists */ |
| |
| ObjDesc = AcpiNsGetAttachedObject (Node); |
| if (!ObjDesc) |
| { |
| Status = AE_NOT_EXIST; |
| goto UnlockAndExit; |
| } |
| |
| /* Find the address handler the user requested */ |
| |
| HandlerObj = ObjDesc->CommonNotify.Handler; |
| LastObjPtr = &ObjDesc->CommonNotify.Handler; |
| while (HandlerObj) |
| { |
| /* We have a handler, see if user requested this one */ |
| |
| if (HandlerObj->AddressSpace.SpaceId == SpaceId) |
| { |
| /* Handler must be the same as the installed handler */ |
| |
| if (HandlerObj->AddressSpace.Handler != Handler) |
| { |
| Status = AE_BAD_PARAMETER; |
| goto UnlockAndExit; |
| } |
| |
| /* Matched SpaceId, first dereference this in the Regions */ |
| |
| ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, |
| "Removing address handler %p(%p) for region %s " |
| "on Device %p(%p)\n", |
| HandlerObj, Handler, AcpiUtGetRegionName (SpaceId), |
| Node, ObjDesc)); |
| |
| RegionObj = HandlerObj->AddressSpace.RegionList; |
| |
| /* Walk the handler's region list */ |
| |
| while (RegionObj) |
| { |
| /* |
| * First disassociate the handler from the region. |
| * |
| * NOTE: this doesn't mean that the region goes away |
| * The region is just inaccessible as indicated to |
| * the _REG method |
| */ |
| AcpiEvDetachRegion (RegionObj, TRUE); |
| |
| /* |
| * Walk the list: Just grab the head because the |
| * DetachRegion removed the previous head. |
| */ |
| RegionObj = HandlerObj->AddressSpace.RegionList; |
| |
| } |
| |
| /* Remove this Handler object from the list */ |
| |
| *LastObjPtr = HandlerObj->AddressSpace.Next; |
| |
| /* Now we can delete the handler object */ |
| |
| AcpiUtRemoveReference (HandlerObj); |
| goto UnlockAndExit; |
| } |
| |
| /* Walk the linked list of handlers */ |
| |
| LastObjPtr = &HandlerObj->AddressSpace.Next; |
| HandlerObj = HandlerObj->AddressSpace.Next; |
| } |
| |
| /* The handler does not exist */ |
| |
| ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, |
| "Unable to remove address handler %p for %s(%X), DevNode %p, obj %p\n", |
| Handler, AcpiUtGetRegionName (SpaceId), SpaceId, Node, ObjDesc)); |
| |
| Status = AE_NOT_EXIST; |
| |
| UnlockAndExit: |
| (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); |
| return_ACPI_STATUS (Status); |
| } |
| |
| ACPI_EXPORT_SYMBOL (AcpiRemoveAddressSpaceHandler) |
