/****************************************************************************** * * Module Name: evxfgpe - External Interfaces for General Purpose Events (GPEs) * *****************************************************************************/ /****************************************************************************** * * 1. Copyright Notice * * Some or all of this work - Copyright (c) 1999 - 2011, 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. * *****************************************************************************/ #define __EVXFGPE_C__ #include "acpi.h" #include "accommon.h" #include "acevents.h" #include "acnamesp.h" #define _COMPONENT ACPI_EVENTS ACPI_MODULE_NAME ("evxfgpe") /******************************************************************************* * * FUNCTION: AcpiUpdateAllGpes * * PARAMETERS: None * * RETURN: Status * * DESCRIPTION: Complete GPE initialization and enable all GPEs that have * associated _Lxx or _Exx methods and are not pointed to by any * device _PRW methods (this indicates that these GPEs are * generally intended for system or device wakeup. Such GPEs * have to be enabled directly when the devices whose _PRW * methods point to them are set up for wakeup signaling.) * * NOTE: Should be called after any GPEs are added to the system. Primarily, * after the system _PRW methods have been run, but also after a GPE Block * Device has been added or if any new GPE methods have been added via a * dynamic table load. * ******************************************************************************/ ACPI_STATUS AcpiUpdateAllGpes ( void) { ACPI_STATUS Status; ACPI_FUNCTION_TRACE (AcpiUpdateGpes); Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } if (AcpiGbl_AllGpesInitialized) { goto UnlockAndExit; } Status = AcpiEvWalkGpeList (AcpiEvInitializeGpeBlock, NULL); if (ACPI_SUCCESS (Status)) { AcpiGbl_AllGpesInitialized = TRUE; } UnlockAndExit: (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS); return_ACPI_STATUS (Status); } ACPI_EXPORT_SYMBOL (AcpiUpdateAllGpes) /******************************************************************************* * * FUNCTION: AcpiEnableGpe * * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1 * GpeNumber - GPE level within the GPE block * * RETURN: Status * * DESCRIPTION: Add a reference to a GPE. On the first reference, the GPE is * hardware-enabled. * ******************************************************************************/ ACPI_STATUS AcpiEnableGpe ( ACPI_HANDLE GpeDevice, UINT32 GpeNumber) { ACPI_STATUS Status = AE_BAD_PARAMETER; ACPI_GPE_EVENT_INFO *GpeEventInfo; ACPI_CPU_FLAGS Flags; ACPI_FUNCTION_TRACE (AcpiEnableGpe); Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); /* Ensure that we have a valid GPE number */ GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber); if (GpeEventInfo) { Status = AcpiEvAddGpeReference (GpeEventInfo); } AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); return_ACPI_STATUS (Status); } ACPI_EXPORT_SYMBOL (AcpiEnableGpe) /******************************************************************************* * * FUNCTION: AcpiDisableGpe * * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1 * GpeNumber - GPE level within the GPE block * * RETURN: Status * * DESCRIPTION: Remove a reference to a GPE. When the last reference is * removed, only then is the GPE disabled (for runtime GPEs), or * the GPE mask bit disabled (for wake GPEs) * ******************************************************************************/ ACPI_STATUS AcpiDisableGpe ( ACPI_HANDLE GpeDevice, UINT32 GpeNumber) { ACPI_STATUS Status = AE_BAD_PARAMETER; ACPI_GPE_EVENT_INFO *GpeEventInfo; ACPI_CPU_FLAGS Flags; ACPI_FUNCTION_TRACE (AcpiDisableGpe); Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); /* Ensure that we have a valid GPE number */ GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber); if (GpeEventInfo) { Status = AcpiEvRemoveGpeReference (GpeEventInfo); } AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); return_ACPI_STATUS (Status); } ACPI_EXPORT_SYMBOL (AcpiDisableGpe) /******************************************************************************* * * FUNCTION: AcpiSetGpe * * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1 * GpeNumber - GPE level within the GPE block * Action - ACPI_GPE_ENABLE or ACPI_GPE_DISABLE * * RETURN: Status * * DESCRIPTION: Enable or disable an individual GPE. This function bypasses * the reference count mechanism used in the AcpiEnableGpe and * AcpiDisableGpe interfaces -- and should be used with care. * * Note: Typically used to disable a runtime GPE for short period of time, * then re-enable it, without disturbing the existing reference counts. This * is useful, for example, in the Embedded Controller (EC) driver. * ******************************************************************************/ ACPI_STATUS AcpiSetGpe ( ACPI_HANDLE GpeDevice, UINT32 GpeNumber, UINT8 Action) { ACPI_GPE_EVENT_INFO *GpeEventInfo; ACPI_STATUS Status; ACPI_CPU_FLAGS Flags; ACPI_FUNCTION_TRACE (AcpiSetGpe); Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); /* Ensure that we have a valid GPE number */ GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber); if (!GpeEventInfo) { Status = AE_BAD_PARAMETER; goto UnlockAndExit; } /* Perform the action */ switch (Action) { case ACPI_GPE_ENABLE: Status = AcpiEvEnableGpe (GpeEventInfo); break; case ACPI_GPE_DISABLE: Status = AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_DISABLE); break; default: Status = AE_BAD_PARAMETER; break; } UnlockAndExit: AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); return_ACPI_STATUS (Status); } ACPI_EXPORT_SYMBOL (AcpiSetGpe) /******************************************************************************* * * FUNCTION: AcpiSetupGpeForWake * * PARAMETERS: WakeDevice - Device associated with the GPE (via _PRW) * GpeDevice - Parent GPE Device. NULL for GPE0/GPE1 * GpeNumber - GPE level within the GPE block * * RETURN: Status * * DESCRIPTION: Mark a GPE as having the ability to wake the system. This * interface is intended to be used as the host executes the * _PRW methods (Power Resources for Wake) in the system tables. * Each _PRW appears under a Device Object (The WakeDevice), and * contains the info for the wake GPE associated with the * WakeDevice. * ******************************************************************************/ ACPI_STATUS AcpiSetupGpeForWake ( ACPI_HANDLE WakeDevice, ACPI_HANDLE GpeDevice, UINT32 GpeNumber) { ACPI_STATUS Status = AE_BAD_PARAMETER; ACPI_GPE_EVENT_INFO *GpeEventInfo; ACPI_NAMESPACE_NODE *DeviceNode; ACPI_CPU_FLAGS Flags; ACPI_FUNCTION_TRACE (AcpiSetupGpeForWake); /* Parameter Validation */ if (!WakeDevice) { /* * By forcing WakeDevice to be valid, we automatically enable the * implicit notify feature on all hosts. */ return_ACPI_STATUS (AE_BAD_PARAMETER); } /* Handle root object case */ if (WakeDevice == ACPI_ROOT_OBJECT) { DeviceNode = AcpiGbl_RootNode; } else { DeviceNode = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, WakeDevice); } /* Validate WakeDevice is of type Device */ if (DeviceNode->Type != ACPI_TYPE_DEVICE) { return_ACPI_STATUS (AE_BAD_PARAMETER); } Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); /* Ensure that we have a valid GPE number */ GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber); if (GpeEventInfo) { /* * If there is no method or handler for this GPE, then the * WakeDevice will be notified whenever this GPE fires (aka * "implicit notify") Note: The GPE is assumed to be * level-triggered (for windows compatibility). */ if ((GpeEventInfo->Flags & ACPI_GPE_DISPATCH_MASK) == ACPI_GPE_DISPATCH_NONE) { GpeEventInfo->Flags = (ACPI_GPE_DISPATCH_NOTIFY | ACPI_GPE_LEVEL_TRIGGERED); GpeEventInfo->Dispatch.DeviceNode = DeviceNode; } GpeEventInfo->Flags |= ACPI_GPE_CAN_WAKE; Status = AE_OK; } AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); return_ACPI_STATUS (Status); } ACPI_EXPORT_SYMBOL (AcpiSetupGpeForWake) /******************************************************************************* * * FUNCTION: AcpiSetGpeWakeMask * * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1 * GpeNumber - GPE level within the GPE block * Action - Enable or Disable * * RETURN: Status * * DESCRIPTION: Set or clear the GPE's wakeup enable mask bit. The GPE must * already be marked as a WAKE GPE. * ******************************************************************************/ ACPI_STATUS AcpiSetGpeWakeMask ( ACPI_HANDLE GpeDevice, UINT32 GpeNumber, UINT8 Action) { ACPI_STATUS Status = AE_OK; ACPI_GPE_EVENT_INFO *GpeEventInfo; ACPI_GPE_REGISTER_INFO *GpeRegisterInfo; ACPI_CPU_FLAGS Flags; UINT32 RegisterBit; ACPI_FUNCTION_TRACE (AcpiSetGpeWakeMask); Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); /* * Ensure that we have a valid GPE number and that this GPE is in * fact a wake GPE */ GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber); if (!GpeEventInfo) { Status = AE_BAD_PARAMETER; goto UnlockAndExit; } if (!(GpeEventInfo->Flags & ACPI_GPE_CAN_WAKE)) { Status = AE_TYPE; goto UnlockAndExit; } GpeRegisterInfo = GpeEventInfo->RegisterInfo; if (!GpeRegisterInfo) { Status = AE_NOT_EXIST; goto UnlockAndExit; } RegisterBit = AcpiHwGetGpeRegisterBit (GpeEventInfo, GpeRegisterInfo); /* Perform the action */ switch (Action) { case ACPI_GPE_ENABLE: ACPI_SET_BIT (GpeRegisterInfo->EnableForWake, (UINT8) RegisterBit); break; case ACPI_GPE_DISABLE: ACPI_CLEAR_BIT (GpeRegisterInfo->EnableForWake, (UINT8) RegisterBit); break; default: ACPI_ERROR ((AE_INFO, "%u, Invalid action", Action)); Status = AE_BAD_PARAMETER; break; } UnlockAndExit: AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); return_ACPI_STATUS (Status); } ACPI_EXPORT_SYMBOL (AcpiSetGpeWakeMask) /******************************************************************************* * * FUNCTION: AcpiClearGpe * * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1 * GpeNumber - GPE level within the GPE block * * RETURN: Status * * DESCRIPTION: Clear an ACPI event (general purpose) * ******************************************************************************/ ACPI_STATUS AcpiClearGpe ( ACPI_HANDLE GpeDevice, UINT32 GpeNumber) { ACPI_STATUS Status = AE_OK; ACPI_GPE_EVENT_INFO *GpeEventInfo; ACPI_CPU_FLAGS Flags; ACPI_FUNCTION_TRACE (AcpiClearGpe); Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); /* Ensure that we have a valid GPE number */ GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber); if (!GpeEventInfo) { Status = AE_BAD_PARAMETER; goto UnlockAndExit; } Status = AcpiHwClearGpe (GpeEventInfo); UnlockAndExit: AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); return_ACPI_STATUS (Status); } ACPI_EXPORT_SYMBOL (AcpiClearGpe) /******************************************************************************* * * FUNCTION: AcpiGetGpeStatus * * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1 * GpeNumber - GPE level within the GPE block * EventStatus - Where the current status of the event * will be returned * * RETURN: Status * * DESCRIPTION: Get the current status of a GPE (signalled/not_signalled) * ******************************************************************************/ ACPI_STATUS AcpiGetGpeStatus ( ACPI_HANDLE GpeDevice, UINT32 GpeNumber, ACPI_EVENT_STATUS *EventStatus) { ACPI_STATUS Status = AE_OK; ACPI_GPE_EVENT_INFO *GpeEventInfo; ACPI_CPU_FLAGS Flags; ACPI_FUNCTION_TRACE (AcpiGetGpeStatus); Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); /* Ensure that we have a valid GPE number */ GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber); if (!GpeEventInfo) { Status = AE_BAD_PARAMETER; goto UnlockAndExit; } /* Obtain status on the requested GPE number */ Status = AcpiHwGetGpeStatus (GpeEventInfo, EventStatus); UnlockAndExit: AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); return_ACPI_STATUS (Status); } ACPI_EXPORT_SYMBOL (AcpiGetGpeStatus) /******************************************************************************* * * FUNCTION: AcpiFinishGpe * * PARAMETERS: GpeDevice - Namespace node for the GPE Block * (NULL for FADT defined GPEs) * GpeNumber - GPE level within the GPE block * * RETURN: Status * * DESCRIPTION: Clear and conditionally reenable a GPE. This completes the GPE * processing. Intended for use by asynchronous host-installed * GPE handlers. The GPE is only reenabled if the EnableForRun bit * is set in the GPE info. * ******************************************************************************/ ACPI_STATUS AcpiFinishGpe ( ACPI_HANDLE GpeDevice, UINT32 GpeNumber) { ACPI_GPE_EVENT_INFO *GpeEventInfo; ACPI_STATUS Status; ACPI_CPU_FLAGS Flags; ACPI_FUNCTION_TRACE (AcpiFinishGpe); Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); /* Ensure that we have a valid GPE number */ GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber); if (!GpeEventInfo) { Status = AE_BAD_PARAMETER; goto UnlockAndExit; } Status = AcpiEvFinishGpe (GpeEventInfo); UnlockAndExit: AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); return_ACPI_STATUS (Status); } ACPI_EXPORT_SYMBOL (AcpiFinishGpe) /****************************************************************************** * * FUNCTION: AcpiDisableAllGpes * * PARAMETERS: None * * RETURN: Status * * DESCRIPTION: Disable and clear all GPEs in all GPE blocks * ******************************************************************************/ ACPI_STATUS AcpiDisableAllGpes ( void) { ACPI_STATUS Status; ACPI_FUNCTION_TRACE (AcpiDisableAllGpes); Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } Status = AcpiHwDisableAllGpes (); (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS); return_ACPI_STATUS (Status); } ACPI_EXPORT_SYMBOL (AcpiDisableAllGpes) /****************************************************************************** * * FUNCTION: AcpiEnableAllRuntimeGpes * * PARAMETERS: None * * RETURN: Status * * DESCRIPTION: Enable all "runtime" GPEs, in all GPE blocks * ******************************************************************************/ ACPI_STATUS AcpiEnableAllRuntimeGpes ( void) { ACPI_STATUS Status; ACPI_FUNCTION_TRACE (AcpiEnableAllRuntimeGpes); Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } Status = AcpiHwEnableAllRuntimeGpes (); (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS); return_ACPI_STATUS (Status); } ACPI_EXPORT_SYMBOL (AcpiEnableAllRuntimeGpes) /******************************************************************************* * * FUNCTION: AcpiInstallGpeBlock * * PARAMETERS: GpeDevice - Handle to the parent GPE Block Device * GpeBlockAddress - Address and SpaceID * RegisterCount - Number of GPE register pairs in the block * InterruptNumber - H/W interrupt for the block * * RETURN: Status * * DESCRIPTION: Create and Install a block of GPE registers. The GPEs are not * enabled here. * ******************************************************************************/ ACPI_STATUS AcpiInstallGpeBlock ( ACPI_HANDLE GpeDevice, ACPI_GENERIC_ADDRESS *GpeBlockAddress, UINT32 RegisterCount, UINT32 InterruptNumber) { ACPI_STATUS Status; ACPI_OPERAND_OBJECT *ObjDesc; ACPI_NAMESPACE_NODE *Node; ACPI_GPE_BLOCK_INFO *GpeBlock; ACPI_FUNCTION_TRACE (AcpiInstallGpeBlock); if ((!GpeDevice) || (!GpeBlockAddress) || (!RegisterCount)) { return_ACPI_STATUS (AE_BAD_PARAMETER); } Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); if (ACPI_FAILURE (Status)) { return (Status); } Node = AcpiNsValidateHandle (GpeDevice); if (!Node) { Status = AE_BAD_PARAMETER; goto UnlockAndExit; } /* * For user-installed GPE Block Devices, the GpeBlockBaseNumber * is always zero */ Status = AcpiEvCreateGpeBlock (Node, GpeBlockAddress, RegisterCount, 0, InterruptNumber, &GpeBlock); if (ACPI_FAILURE (Status)) { goto UnlockAndExit; } /* Install block in the DeviceObject attached to the node */ ObjDesc = AcpiNsGetAttachedObject (Node); if (!ObjDesc) { /* * No object, create a new one (Device nodes do not always have * an attached object) */ ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_DEVICE); if (!ObjDesc) { Status = AE_NO_MEMORY; goto UnlockAndExit; } Status = AcpiNsAttachObject (Node, ObjDesc, ACPI_TYPE_DEVICE); /* Remove local reference to the object */ AcpiUtRemoveReference (ObjDesc); if (ACPI_FAILURE (Status)) { goto UnlockAndExit; } } /* Now install the GPE block in the DeviceObject */ ObjDesc->Device.GpeBlock = GpeBlock; UnlockAndExit: (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); return_ACPI_STATUS (Status); } ACPI_EXPORT_SYMBOL (AcpiInstallGpeBlock) /******************************************************************************* * * FUNCTION: AcpiRemoveGpeBlock * * PARAMETERS: GpeDevice - Handle to the parent GPE Block Device * * RETURN: Status * * DESCRIPTION: Remove a previously installed block of GPE registers * ******************************************************************************/ ACPI_STATUS AcpiRemoveGpeBlock ( ACPI_HANDLE GpeDevice) { ACPI_OPERAND_OBJECT *ObjDesc; ACPI_STATUS Status; ACPI_NAMESPACE_NODE *Node; ACPI_FUNCTION_TRACE (AcpiRemoveGpeBlock); if (!GpeDevice) { return_ACPI_STATUS (AE_BAD_PARAMETER); } Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); if (ACPI_FAILURE (Status)) { return (Status); } Node = AcpiNsValidateHandle (GpeDevice); if (!Node) { Status = AE_BAD_PARAMETER; goto UnlockAndExit; } /* Get the DeviceObject attached to the node */ ObjDesc = AcpiNsGetAttachedObject (Node); if (!ObjDesc || !ObjDesc->Device.GpeBlock) { return_ACPI_STATUS (AE_NULL_OBJECT); } /* Delete the GPE block (but not the DeviceObject) */ Status = AcpiEvDeleteGpeBlock (ObjDesc->Device.GpeBlock); if (ACPI_SUCCESS (Status)) { ObjDesc->Device.GpeBlock = NULL; } UnlockAndExit: (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); return_ACPI_STATUS (Status); } ACPI_EXPORT_SYMBOL (AcpiRemoveGpeBlock) /******************************************************************************* * * FUNCTION: AcpiGetGpeDevice * * PARAMETERS: Index - System GPE index (0-CurrentGpeCount) * GpeDevice - Where the parent GPE Device is returned * * RETURN: Status * * DESCRIPTION: Obtain the GPE device associated with the input index. A NULL * gpe device indicates that the gpe number is contained in one of * the FADT-defined gpe blocks. Otherwise, the GPE block device. * ******************************************************************************/ ACPI_STATUS AcpiGetGpeDevice ( UINT32 Index, ACPI_HANDLE *GpeDevice) { ACPI_GPE_DEVICE_INFO Info; ACPI_STATUS Status; ACPI_FUNCTION_TRACE (AcpiGetGpeDevice); if (!GpeDevice) { return_ACPI_STATUS (AE_BAD_PARAMETER); } if (Index >= AcpiCurrentGpeCount) { return_ACPI_STATUS (AE_NOT_EXIST); } /* Setup and walk the GPE list */ Info.Index = Index; Info.Status = AE_NOT_EXIST; Info.GpeDevice = NULL; Info.NextBlockBaseIndex = 0; Status = AcpiEvWalkGpeList (AcpiEvGetGpeDevice, &Info); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } *GpeDevice = ACPI_CAST_PTR (ACPI_HANDLE, Info.GpeDevice); return_ACPI_STATUS (Info.Status); } ACPI_EXPORT_SYMBOL (AcpiGetGpeDevice)