| /****************************************************************************** |
| * |
| * Module Name: evxface - External interfaces for ACPI events |
| * |
| *****************************************************************************/ |
| |
| /* |
| * 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" |
| #include "acinterp.h" |
| |
| #define _COMPONENT ACPI_EVENTS |
| ACPI_MODULE_NAME ("evxface") |
| |
| #if (!ACPI_REDUCED_HARDWARE) |
| |
| /* Local prototypes */ |
| |
| static ACPI_STATUS |
| AcpiEvInstallGpeHandler ( |
| ACPI_HANDLE GpeDevice, |
| UINT32 GpeNumber, |
| UINT32 Type, |
| BOOLEAN IsRawHandler, |
| ACPI_GPE_HANDLER Address, |
| void *Context); |
| |
| #endif |
| |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: AcpiInstallNotifyHandler |
| * |
| * PARAMETERS: Device - The device for which notifies will be handled |
| * HandlerType - The type of handler: |
| * ACPI_SYSTEM_NOTIFY: System Handler (00-7F) |
| * ACPI_DEVICE_NOTIFY: Device Handler (80-FF) |
| * ACPI_ALL_NOTIFY: Both System and Device |
| * Handler - Address of the handler |
| * Context - Value passed to the handler on each GPE |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Install a handler for notifications on an ACPI Device, |
| * ThermalZone, or Processor object. |
| * |
| * NOTES: The Root namespace object may have only one handler for each |
| * type of notify (System/Device). Device/Thermal/Processor objects |
| * may have one device notify handler, and multiple system notify |
| * handlers. |
| * |
| ******************************************************************************/ |
| |
| ACPI_STATUS |
| AcpiInstallNotifyHandler ( |
| ACPI_HANDLE Device, |
| UINT32 HandlerType, |
| ACPI_NOTIFY_HANDLER Handler, |
| void *Context) |
| { |
| ACPI_NAMESPACE_NODE *Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Device); |
| ACPI_OPERAND_OBJECT *ObjDesc; |
| ACPI_OPERAND_OBJECT *HandlerObj; |
| ACPI_STATUS Status; |
| UINT32 i; |
| |
| |
| ACPI_FUNCTION_TRACE (AcpiInstallNotifyHandler); |
| |
| |
| /* Parameter validation */ |
| |
| if ((!Device) || (!Handler) || (!HandlerType) || |
| (HandlerType > ACPI_MAX_NOTIFY_HANDLER_TYPE)) |
| { |
| return_ACPI_STATUS (AE_BAD_PARAMETER); |
| } |
| |
| Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); |
| if (ACPI_FAILURE (Status)) |
| { |
| return_ACPI_STATUS (Status); |
| } |
| |
| /* |
| * Root Object: |
| * Registering a notify handler on the root object indicates that the |
| * caller wishes to receive notifications for all objects. Note that |
| * only one global handler can be registered per notify type. |
| * Ensure that a handler is not already installed. |
| */ |
| if (Device == ACPI_ROOT_OBJECT) |
| { |
| for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) |
| { |
| if (HandlerType & (i+1)) |
| { |
| if (AcpiGbl_GlobalNotify[i].Handler) |
| { |
| Status = AE_ALREADY_EXISTS; |
| goto UnlockAndExit; |
| } |
| |
| AcpiGbl_GlobalNotify[i].Handler = Handler; |
| AcpiGbl_GlobalNotify[i].Context = Context; |
| } |
| } |
| |
| goto UnlockAndExit; /* Global notify handler installed, all done */ |
| } |
| |
| /* |
| * All Other Objects: |
| * Caller will only receive notifications specific to the target |
| * object. Note that only certain object types are allowed to |
| * receive notifications. |
| */ |
| |
| /* Are Notifies allowed on this object? */ |
| |
| if (!AcpiEvIsNotifyObject (Node)) |
| { |
| Status = AE_TYPE; |
| goto UnlockAndExit; |
| } |
| |
| /* Check for an existing internal object, might not exist */ |
| |
| ObjDesc = AcpiNsGetAttachedObject (Node); |
| if (!ObjDesc) |
| { |
| /* Create a new object */ |
| |
| ObjDesc = AcpiUtCreateInternalObject (Node->Type); |
| if (!ObjDesc) |
| { |
| Status = AE_NO_MEMORY; |
| goto UnlockAndExit; |
| } |
| |
| /* Attach new object to the Node, remove local reference */ |
| |
| Status = AcpiNsAttachObject (Device, ObjDesc, Node->Type); |
| AcpiUtRemoveReference (ObjDesc); |
| if (ACPI_FAILURE (Status)) |
| { |
| goto UnlockAndExit; |
| } |
| } |
| |
| /* Ensure that the handler is not already installed in the lists */ |
| |
| for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) |
| { |
| if (HandlerType & (i+1)) |
| { |
| HandlerObj = ObjDesc->CommonNotify.NotifyList[i]; |
| while (HandlerObj) |
| { |
| if (HandlerObj->Notify.Handler == Handler) |
| { |
| Status = AE_ALREADY_EXISTS; |
| goto UnlockAndExit; |
| } |
| |
| HandlerObj = HandlerObj->Notify.Next[i]; |
| } |
| } |
| } |
| |
| /* Create and populate a new notify handler object */ |
| |
| HandlerObj = AcpiUtCreateInternalObject (ACPI_TYPE_LOCAL_NOTIFY); |
| if (!HandlerObj) |
| { |
| Status = AE_NO_MEMORY; |
| goto UnlockAndExit; |
| } |
| |
| HandlerObj->Notify.Node = Node; |
| HandlerObj->Notify.HandlerType = HandlerType; |
| HandlerObj->Notify.Handler = Handler; |
| HandlerObj->Notify.Context = Context; |
| |
| /* Install the handler at the list head(s) */ |
| |
| for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) |
| { |
| if (HandlerType & (i+1)) |
| { |
| HandlerObj->Notify.Next[i] = |
| ObjDesc->CommonNotify.NotifyList[i]; |
| |
| ObjDesc->CommonNotify.NotifyList[i] = HandlerObj; |
| } |
| } |
| |
| /* Add an extra reference if handler was installed in both lists */ |
| |
| if (HandlerType == ACPI_ALL_NOTIFY) |
| { |
| AcpiUtAddReference (HandlerObj); |
| } |
| |
| |
| UnlockAndExit: |
| (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); |
| return_ACPI_STATUS (Status); |
| } |
| |
| ACPI_EXPORT_SYMBOL (AcpiInstallNotifyHandler) |
| |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: AcpiRemoveNotifyHandler |
| * |
| * PARAMETERS: Device - The device for which the handler is installed |
| * HandlerType - The type of handler: |
| * ACPI_SYSTEM_NOTIFY: System Handler (00-7F) |
| * ACPI_DEVICE_NOTIFY: Device Handler (80-FF) |
| * ACPI_ALL_NOTIFY: Both System and Device |
| * Handler - Address of the handler |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Remove a handler for notifies on an ACPI device |
| * |
| ******************************************************************************/ |
| |
| ACPI_STATUS |
| AcpiRemoveNotifyHandler ( |
| ACPI_HANDLE Device, |
| UINT32 HandlerType, |
| ACPI_NOTIFY_HANDLER Handler) |
| { |
| ACPI_NAMESPACE_NODE *Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Device); |
| ACPI_OPERAND_OBJECT *ObjDesc; |
| ACPI_OPERAND_OBJECT *HandlerObj; |
| ACPI_OPERAND_OBJECT *PreviousHandlerObj; |
| ACPI_STATUS Status = AE_OK; |
| UINT32 i; |
| |
| |
| ACPI_FUNCTION_TRACE (AcpiRemoveNotifyHandler); |
| |
| |
| /* Parameter validation */ |
| |
| if ((!Device) || (!Handler) || (!HandlerType) || |
| (HandlerType > ACPI_MAX_NOTIFY_HANDLER_TYPE)) |
| { |
| return_ACPI_STATUS (AE_BAD_PARAMETER); |
| } |
| |
| /* Root Object. Global handlers are removed here */ |
| |
| if (Device == ACPI_ROOT_OBJECT) |
| { |
| for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) |
| { |
| if (HandlerType & (i+1)) |
| { |
| Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); |
| if (ACPI_FAILURE (Status)) |
| { |
| return_ACPI_STATUS (Status); |
| } |
| |
| if (!AcpiGbl_GlobalNotify[i].Handler || |
| (AcpiGbl_GlobalNotify[i].Handler != Handler)) |
| { |
| Status = AE_NOT_EXIST; |
| goto UnlockAndExit; |
| } |
| |
| ACPI_DEBUG_PRINT ((ACPI_DB_INFO, |
| "Removing global notify handler\n")); |
| |
| AcpiGbl_GlobalNotify[i].Handler = NULL; |
| AcpiGbl_GlobalNotify[i].Context = NULL; |
| |
| (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); |
| |
| /* Make sure all deferred notify tasks are completed */ |
| |
| AcpiOsWaitEventsComplete (); |
| } |
| } |
| |
| return_ACPI_STATUS (AE_OK); |
| } |
| |
| /* All other objects: Are Notifies allowed on this object? */ |
| |
| if (!AcpiEvIsNotifyObject (Node)) |
| { |
| return_ACPI_STATUS (AE_TYPE); |
| } |
| |
| /* Must have an existing internal object */ |
| |
| ObjDesc = AcpiNsGetAttachedObject (Node); |
| if (!ObjDesc) |
| { |
| return_ACPI_STATUS (AE_NOT_EXIST); |
| } |
| |
| /* Internal object exists. Find the handler and remove it */ |
| |
| for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) |
| { |
| if (HandlerType & (i+1)) |
| { |
| Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); |
| if (ACPI_FAILURE (Status)) |
| { |
| return_ACPI_STATUS (Status); |
| } |
| |
| HandlerObj = ObjDesc->CommonNotify.NotifyList[i]; |
| PreviousHandlerObj = NULL; |
| |
| /* Attempt to find the handler in the handler list */ |
| |
| while (HandlerObj && |
| (HandlerObj->Notify.Handler != Handler)) |
| { |
| PreviousHandlerObj = HandlerObj; |
| HandlerObj = HandlerObj->Notify.Next[i]; |
| } |
| |
| if (!HandlerObj) |
| { |
| Status = AE_NOT_EXIST; |
| goto UnlockAndExit; |
| } |
| |
| /* Remove the handler object from the list */ |
| |
| if (PreviousHandlerObj) /* Handler is not at the list head */ |
| { |
| PreviousHandlerObj->Notify.Next[i] = |
| HandlerObj->Notify.Next[i]; |
| } |
| else /* Handler is at the list head */ |
| { |
| ObjDesc->CommonNotify.NotifyList[i] = |
| HandlerObj->Notify.Next[i]; |
| } |
| |
| (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); |
| |
| /* Make sure all deferred notify tasks are completed */ |
| |
| AcpiOsWaitEventsComplete (); |
| AcpiUtRemoveReference (HandlerObj); |
| } |
| } |
| |
| return_ACPI_STATUS (Status); |
| |
| |
| UnlockAndExit: |
| (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); |
| return_ACPI_STATUS (Status); |
| } |
| |
| ACPI_EXPORT_SYMBOL (AcpiRemoveNotifyHandler) |
| |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: AcpiInstallExceptionHandler |
| * |
| * PARAMETERS: Handler - Pointer to the handler function for the |
| * event |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Saves the pointer to the handler function |
| * |
| ******************************************************************************/ |
| |
| ACPI_STATUS |
| AcpiInstallExceptionHandler ( |
| ACPI_EXCEPTION_HANDLER Handler) |
| { |
| ACPI_STATUS Status; |
| |
| |
| ACPI_FUNCTION_TRACE (AcpiInstallExceptionHandler); |
| |
| |
| Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS); |
| if (ACPI_FAILURE (Status)) |
| { |
| return_ACPI_STATUS (Status); |
| } |
| |
| /* Don't allow two handlers. */ |
| |
| if (AcpiGbl_ExceptionHandler) |
| { |
| Status = AE_ALREADY_EXISTS; |
| goto Cleanup; |
| } |
| |
| /* Install the handler */ |
| |
| AcpiGbl_ExceptionHandler = Handler; |
| |
| Cleanup: |
| (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS); |
| return_ACPI_STATUS (Status); |
| } |
| |
| ACPI_EXPORT_SYMBOL (AcpiInstallExceptionHandler) |
| |
| |
| #if (!ACPI_REDUCED_HARDWARE) |
| /******************************************************************************* |
| * |
| * FUNCTION: AcpiInstallSciHandler |
| * |
| * PARAMETERS: Address - Address of the handler |
| * Context - Value passed to the handler on each SCI |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Install a handler for a System Control Interrupt. |
| * |
| ******************************************************************************/ |
| |
| ACPI_STATUS |
| AcpiInstallSciHandler ( |
| ACPI_SCI_HANDLER Address, |
| void *Context) |
| { |
| ACPI_SCI_HANDLER_INFO *NewSciHandler; |
| ACPI_SCI_HANDLER_INFO *SciHandler; |
| ACPI_CPU_FLAGS Flags; |
| ACPI_STATUS Status; |
| |
| |
| ACPI_FUNCTION_TRACE (AcpiInstallSciHandler); |
| |
| |
| if (!Address) |
| { |
| return_ACPI_STATUS (AE_BAD_PARAMETER); |
| } |
| |
| /* Allocate and init a handler object */ |
| |
| NewSciHandler = ACPI_ALLOCATE (sizeof (ACPI_SCI_HANDLER_INFO)); |
| if (!NewSciHandler) |
| { |
| return_ACPI_STATUS (AE_NO_MEMORY); |
| } |
| |
| NewSciHandler->Address = Address; |
| NewSciHandler->Context = Context; |
| |
| Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS); |
| if (ACPI_FAILURE (Status)) |
| { |
| goto Exit; |
| } |
| |
| /* Lock list during installation */ |
| |
| Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); |
| SciHandler = AcpiGbl_SciHandlerList; |
| |
| /* Ensure handler does not already exist */ |
| |
| while (SciHandler) |
| { |
| if (Address == SciHandler->Address) |
| { |
| Status = AE_ALREADY_EXISTS; |
| goto UnlockAndExit; |
| } |
| |
| SciHandler = SciHandler->Next; |
| } |
| |
| /* Install the new handler into the global list (at head) */ |
| |
| NewSciHandler->Next = AcpiGbl_SciHandlerList; |
| AcpiGbl_SciHandlerList = NewSciHandler; |
| |
| |
| UnlockAndExit: |
| |
| AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); |
| (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS); |
| |
| Exit: |
| if (ACPI_FAILURE (Status)) |
| { |
| ACPI_FREE (NewSciHandler); |
| } |
| return_ACPI_STATUS (Status); |
| } |
| |
| ACPI_EXPORT_SYMBOL (AcpiInstallSciHandler) |
| |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: AcpiRemoveSciHandler |
| * |
| * PARAMETERS: Address - Address of the handler |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Remove a handler for a System Control Interrupt. |
| * |
| ******************************************************************************/ |
| |
| ACPI_STATUS |
| AcpiRemoveSciHandler ( |
| ACPI_SCI_HANDLER Address) |
| { |
| ACPI_SCI_HANDLER_INFO *PrevSciHandler; |
| ACPI_SCI_HANDLER_INFO *NextSciHandler; |
| ACPI_CPU_FLAGS Flags; |
| ACPI_STATUS Status; |
| |
| |
| ACPI_FUNCTION_TRACE (AcpiRemoveSciHandler); |
| |
| |
| if (!Address) |
| { |
| return_ACPI_STATUS (AE_BAD_PARAMETER); |
| } |
| |
| Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS); |
| if (ACPI_FAILURE (Status)) |
| { |
| return_ACPI_STATUS (Status); |
| } |
| |
| /* Remove the SCI handler with lock */ |
| |
| Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); |
| |
| PrevSciHandler = NULL; |
| NextSciHandler = AcpiGbl_SciHandlerList; |
| while (NextSciHandler) |
| { |
| if (NextSciHandler->Address == Address) |
| { |
| /* Unlink and free the SCI handler info block */ |
| |
| if (PrevSciHandler) |
| { |
| PrevSciHandler->Next = NextSciHandler->Next; |
| } |
| else |
| { |
| AcpiGbl_SciHandlerList = NextSciHandler->Next; |
| } |
| |
| AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); |
| ACPI_FREE (NextSciHandler); |
| goto UnlockAndExit; |
| } |
| |
| PrevSciHandler = NextSciHandler; |
| NextSciHandler = NextSciHandler->Next; |
| } |
| |
| AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); |
| Status = AE_NOT_EXIST; |
| |
| |
| UnlockAndExit: |
| (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS); |
| return_ACPI_STATUS (Status); |
| } |
| |
| ACPI_EXPORT_SYMBOL (AcpiRemoveSciHandler) |
| |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: AcpiInstallGlobalEventHandler |
| * |
| * PARAMETERS: Handler - Pointer to the global event handler function |
| * Context - Value passed to the handler on each event |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Saves the pointer to the handler function. The global handler |
| * is invoked upon each incoming GPE and Fixed Event. It is |
| * invoked at interrupt level at the time of the event dispatch. |
| * Can be used to update event counters, etc. |
| * |
| ******************************************************************************/ |
| |
| ACPI_STATUS |
| AcpiInstallGlobalEventHandler ( |
| ACPI_GBL_EVENT_HANDLER Handler, |
| void *Context) |
| { |
| ACPI_STATUS Status; |
| |
| |
| ACPI_FUNCTION_TRACE (AcpiInstallGlobalEventHandler); |
| |
| |
| /* Parameter validation */ |
| |
| if (!Handler) |
| { |
| return_ACPI_STATUS (AE_BAD_PARAMETER); |
| } |
| |
| Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS); |
| if (ACPI_FAILURE (Status)) |
| { |
| return_ACPI_STATUS (Status); |
| } |
| |
| /* Don't allow two handlers. */ |
| |
| if (AcpiGbl_GlobalEventHandler) |
| { |
| Status = AE_ALREADY_EXISTS; |
| goto Cleanup; |
| } |
| |
| AcpiGbl_GlobalEventHandler = Handler; |
| AcpiGbl_GlobalEventHandlerContext = Context; |
| |
| |
| Cleanup: |
| (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS); |
| return_ACPI_STATUS (Status); |
| } |
| |
| ACPI_EXPORT_SYMBOL (AcpiInstallGlobalEventHandler) |
| |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: AcpiInstallFixedEventHandler |
| * |
| * PARAMETERS: Event - Event type to enable. |
| * Handler - Pointer to the handler function for the |
| * event |
| * Context - Value passed to the handler on each GPE |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Saves the pointer to the handler function and then enables the |
| * event. |
| * |
| ******************************************************************************/ |
| |
| ACPI_STATUS |
| AcpiInstallFixedEventHandler ( |
| UINT32 Event, |
| ACPI_EVENT_HANDLER Handler, |
| void *Context) |
| { |
| ACPI_STATUS Status; |
| |
| |
| ACPI_FUNCTION_TRACE (AcpiInstallFixedEventHandler); |
| |
| |
| /* Parameter validation */ |
| |
| if (Event > ACPI_EVENT_MAX) |
| { |
| return_ACPI_STATUS (AE_BAD_PARAMETER); |
| } |
| |
| Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS); |
| if (ACPI_FAILURE (Status)) |
| { |
| return_ACPI_STATUS (Status); |
| } |
| |
| /* Do not allow multiple handlers */ |
| |
| if (AcpiGbl_FixedEventHandlers[Event].Handler) |
| { |
| Status = AE_ALREADY_EXISTS; |
| goto Cleanup; |
| } |
| |
| /* Install the handler before enabling the event */ |
| |
| AcpiGbl_FixedEventHandlers[Event].Handler = Handler; |
| AcpiGbl_FixedEventHandlers[Event].Context = Context; |
| |
| Status = AcpiEnableEvent (Event, 0); |
| if (ACPI_FAILURE (Status)) |
| { |
| ACPI_WARNING ((AE_INFO, |
| "Could not enable fixed event - %s (%u)", |
| AcpiUtGetEventName (Event), Event)); |
| |
| /* Remove the handler */ |
| |
| AcpiGbl_FixedEventHandlers[Event].Handler = NULL; |
| AcpiGbl_FixedEventHandlers[Event].Context = NULL; |
| } |
| else |
| { |
| ACPI_DEBUG_PRINT ((ACPI_DB_INFO, |
| "Enabled fixed event %s (%X), Handler=%p\n", |
| AcpiUtGetEventName (Event), Event, Handler)); |
| } |
| |
| |
| Cleanup: |
| (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS); |
| return_ACPI_STATUS (Status); |
| } |
| |
| ACPI_EXPORT_SYMBOL (AcpiInstallFixedEventHandler) |
| |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: AcpiRemoveFixedEventHandler |
| * |
| * PARAMETERS: Event - Event type to disable. |
| * Handler - Address of the handler |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Disables the event and unregisters the event handler. |
| * |
| ******************************************************************************/ |
| |
| ACPI_STATUS |
| AcpiRemoveFixedEventHandler ( |
| UINT32 Event, |
| ACPI_EVENT_HANDLER Handler) |
| { |
| ACPI_STATUS Status = AE_OK; |
| |
| |
| ACPI_FUNCTION_TRACE (AcpiRemoveFixedEventHandler); |
| |
| |
| /* Parameter validation */ |
| |
| if (Event > ACPI_EVENT_MAX) |
| { |
| return_ACPI_STATUS (AE_BAD_PARAMETER); |
| } |
| |
| Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS); |
| if (ACPI_FAILURE (Status)) |
| { |
| return_ACPI_STATUS (Status); |
| } |
| |
| /* Disable the event before removing the handler */ |
| |
| Status = AcpiDisableEvent (Event, 0); |
| |
| /* Always Remove the handler */ |
| |
| AcpiGbl_FixedEventHandlers[Event].Handler = NULL; |
| AcpiGbl_FixedEventHandlers[Event].Context = NULL; |
| |
| if (ACPI_FAILURE (Status)) |
| { |
| ACPI_WARNING ((AE_INFO, |
| "Could not disable fixed event - %s (%u)", |
| AcpiUtGetEventName (Event), Event)); |
| } |
| else |
| { |
| ACPI_DEBUG_PRINT ((ACPI_DB_INFO, |
| "Disabled fixed event - %s (%X)\n", |
| AcpiUtGetEventName (Event), Event)); |
| } |
| |
| (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS); |
| return_ACPI_STATUS (Status); |
| } |
| |
| ACPI_EXPORT_SYMBOL (AcpiRemoveFixedEventHandler) |
| |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: AcpiEvInstallGpeHandler |
| * |
| * PARAMETERS: GpeDevice - Namespace node for the GPE (NULL for FADT |
| * defined GPEs) |
| * GpeNumber - The GPE number within the GPE block |
| * Type - Whether this GPE should be treated as an |
| * edge- or level-triggered interrupt. |
| * IsRawHandler - Whether this GPE should be handled using |
| * the special GPE handler mode. |
| * Address - Address of the handler |
| * Context - Value passed to the handler on each GPE |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Internal function to install a handler for a General Purpose |
| * Event. |
| * |
| ******************************************************************************/ |
| |
| static ACPI_STATUS |
| AcpiEvInstallGpeHandler ( |
| ACPI_HANDLE GpeDevice, |
| UINT32 GpeNumber, |
| UINT32 Type, |
| BOOLEAN IsRawHandler, |
| ACPI_GPE_HANDLER Address, |
| void *Context) |
| { |
| ACPI_GPE_EVENT_INFO *GpeEventInfo; |
| ACPI_GPE_HANDLER_INFO *Handler; |
| ACPI_STATUS Status; |
| ACPI_CPU_FLAGS Flags; |
| |
| |
| ACPI_FUNCTION_TRACE (EvInstallGpeHandler); |
| |
| |
| /* Parameter validation */ |
| |
| if ((!Address) || (Type & ~ACPI_GPE_XRUPT_TYPE_MASK)) |
| { |
| return_ACPI_STATUS (AE_BAD_PARAMETER); |
| } |
| |
| Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS); |
| if (ACPI_FAILURE (Status)) |
| { |
| return_ACPI_STATUS (Status); |
| } |
| |
| /* Allocate and init handler object (before lock) */ |
| |
| Handler = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_GPE_HANDLER_INFO)); |
| if (!Handler) |
| { |
| Status = AE_NO_MEMORY; |
| goto UnlockAndExit; |
| } |
| |
| Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); |
| |
| /* Ensure that we have a valid GPE number */ |
| |
| GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber); |
| if (!GpeEventInfo) |
| { |
| Status = AE_BAD_PARAMETER; |
| goto FreeAndExit; |
| } |
| |
| /* Make sure that there isn't a handler there already */ |
| |
| if ((ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) == |
| ACPI_GPE_DISPATCH_HANDLER) || |
| (ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) == |
| ACPI_GPE_DISPATCH_RAW_HANDLER)) |
| { |
| Status = AE_ALREADY_EXISTS; |
| goto FreeAndExit; |
| } |
| |
| Handler->Address = Address; |
| Handler->Context = Context; |
| Handler->MethodNode = GpeEventInfo->Dispatch.MethodNode; |
| Handler->OriginalFlags = (UINT8) (GpeEventInfo->Flags & |
| (ACPI_GPE_XRUPT_TYPE_MASK | ACPI_GPE_DISPATCH_MASK)); |
| |
| /* |
| * If the GPE is associated with a method, it may have been enabled |
| * automatically during initialization, in which case it has to be |
| * disabled now to avoid spurious execution of the handler. |
| */ |
| if (((ACPI_GPE_DISPATCH_TYPE (Handler->OriginalFlags) == |
| ACPI_GPE_DISPATCH_METHOD) || |
| (ACPI_GPE_DISPATCH_TYPE (Handler->OriginalFlags) == |
| ACPI_GPE_DISPATCH_NOTIFY)) && |
| GpeEventInfo->RuntimeCount) |
| { |
| Handler->OriginallyEnabled = TRUE; |
| (void) AcpiEvRemoveGpeReference (GpeEventInfo); |
| |
| /* Sanity check of original type against new type */ |
| |
| if (Type != (UINT32) (GpeEventInfo->Flags & ACPI_GPE_XRUPT_TYPE_MASK)) |
| { |
| ACPI_WARNING ((AE_INFO, "GPE type mismatch (level/edge)")); |
| } |
| } |
| |
| /* Install the handler */ |
| |
| GpeEventInfo->Dispatch.Handler = Handler; |
| |
| /* Setup up dispatch flags to indicate handler (vs. method/notify) */ |
| |
| GpeEventInfo->Flags &= ~(ACPI_GPE_XRUPT_TYPE_MASK | ACPI_GPE_DISPATCH_MASK); |
| GpeEventInfo->Flags |= (UINT8) (Type | (IsRawHandler ? |
| ACPI_GPE_DISPATCH_RAW_HANDLER : ACPI_GPE_DISPATCH_HANDLER)); |
| |
| AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); |
| |
| |
| UnlockAndExit: |
| (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS); |
| return_ACPI_STATUS (Status); |
| |
| FreeAndExit: |
| AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); |
| ACPI_FREE (Handler); |
| goto UnlockAndExit; |
| } |
| |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: AcpiInstallGpeHandler |
| * |
| * PARAMETERS: GpeDevice - Namespace node for the GPE (NULL for FADT |
| * defined GPEs) |
| * GpeNumber - The GPE number within the GPE block |
| * Type - Whether this GPE should be treated as an |
| * edge- or level-triggered interrupt. |
| * Address - Address of the handler |
| * Context - Value passed to the handler on each GPE |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Install a handler for a General Purpose Event. |
| * |
| ******************************************************************************/ |
| |
| ACPI_STATUS |
| AcpiInstallGpeHandler ( |
| ACPI_HANDLE GpeDevice, |
| UINT32 GpeNumber, |
| UINT32 Type, |
| ACPI_GPE_HANDLER Address, |
| void *Context) |
| { |
| ACPI_STATUS Status; |
| |
| |
| ACPI_FUNCTION_TRACE (AcpiInstallGpeHandler); |
| |
| |
| Status = AcpiEvInstallGpeHandler (GpeDevice, GpeNumber, Type, |
| FALSE, Address, Context); |
| |
| return_ACPI_STATUS (Status); |
| } |
| |
| ACPI_EXPORT_SYMBOL (AcpiInstallGpeHandler) |
| |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: AcpiInstallGpeRawHandler |
| * |
| * PARAMETERS: GpeDevice - Namespace node for the GPE (NULL for FADT |
| * defined GPEs) |
| * GpeNumber - The GPE number within the GPE block |
| * Type - Whether this GPE should be treated as an |
| * edge- or level-triggered interrupt. |
| * Address - Address of the handler |
| * Context - Value passed to the handler on each GPE |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Install a handler for a General Purpose Event. |
| * |
| ******************************************************************************/ |
| |
| ACPI_STATUS |
| AcpiInstallGpeRawHandler ( |
| ACPI_HANDLE GpeDevice, |
| UINT32 GpeNumber, |
| UINT32 Type, |
| ACPI_GPE_HANDLER Address, |
| void *Context) |
| { |
| ACPI_STATUS Status; |
| |
| |
| ACPI_FUNCTION_TRACE (AcpiInstallGpeRawHandler); |
| |
| |
| Status = AcpiEvInstallGpeHandler (GpeDevice, GpeNumber, Type, |
| TRUE, Address, Context); |
| |
| return_ACPI_STATUS (Status); |
| } |
| |
| ACPI_EXPORT_SYMBOL (AcpiInstallGpeRawHandler) |
| |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: AcpiRemoveGpeHandler |
| * |
| * PARAMETERS: GpeDevice - Namespace node for the GPE (NULL for FADT |
| * defined GPEs) |
| * GpeNumber - The event to remove a handler |
| * Address - Address of the handler |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Remove a handler for a General Purpose AcpiEvent. |
| * |
| ******************************************************************************/ |
| |
| ACPI_STATUS |
| AcpiRemoveGpeHandler ( |
| ACPI_HANDLE GpeDevice, |
| UINT32 GpeNumber, |
| ACPI_GPE_HANDLER Address) |
| { |
| ACPI_GPE_EVENT_INFO *GpeEventInfo; |
| ACPI_GPE_HANDLER_INFO *Handler; |
| ACPI_STATUS Status; |
| ACPI_CPU_FLAGS Flags; |
| |
| |
| ACPI_FUNCTION_TRACE (AcpiRemoveGpeHandler); |
| |
| |
| /* Parameter validation */ |
| |
| if (!Address) |
| { |
| return_ACPI_STATUS (AE_BAD_PARAMETER); |
| } |
| |
| Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS); |
| if (ACPI_FAILURE (Status)) |
| { |
| return_ACPI_STATUS (Status); |
| } |
| |
| Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); |
| |
| /* Ensure that we have a valid GPE number */ |
| |
| GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber); |
| if (!GpeEventInfo) |
| { |
| Status = AE_BAD_PARAMETER; |
| goto UnlockAndExit; |
| } |
| |
| /* Make sure that a handler is indeed installed */ |
| |
| if ((ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) != |
| ACPI_GPE_DISPATCH_HANDLER) && |
| (ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) != |
| ACPI_GPE_DISPATCH_RAW_HANDLER)) |
| { |
| Status = AE_NOT_EXIST; |
| goto UnlockAndExit; |
| } |
| |
| /* Make sure that the installed handler is the same */ |
| |
| if (GpeEventInfo->Dispatch.Handler->Address != Address) |
| { |
| Status = AE_BAD_PARAMETER; |
| goto UnlockAndExit; |
| } |
| |
| /* Remove the handler */ |
| |
| Handler = GpeEventInfo->Dispatch.Handler; |
| GpeEventInfo->Dispatch.Handler = NULL; |
| |
| /* Restore Method node (if any), set dispatch flags */ |
| |
| GpeEventInfo->Dispatch.MethodNode = Handler->MethodNode; |
| GpeEventInfo->Flags &= |
| ~(ACPI_GPE_XRUPT_TYPE_MASK | ACPI_GPE_DISPATCH_MASK); |
| GpeEventInfo->Flags |= Handler->OriginalFlags; |
| |
| /* |
| * If the GPE was previously associated with a method and it was |
| * enabled, it should be enabled at this point to restore the |
| * post-initialization configuration. |
| */ |
| if (((ACPI_GPE_DISPATCH_TYPE (Handler->OriginalFlags) == |
| ACPI_GPE_DISPATCH_METHOD) || |
| (ACPI_GPE_DISPATCH_TYPE (Handler->OriginalFlags) == |
| ACPI_GPE_DISPATCH_NOTIFY)) && |
| Handler->OriginallyEnabled) |
| { |
| (void) AcpiEvAddGpeReference (GpeEventInfo); |
| } |
| |
| AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); |
| (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS); |
| |
| /* Make sure all deferred GPE tasks are completed */ |
| |
| AcpiOsWaitEventsComplete (); |
| |
| /* Now we can free the handler object */ |
| |
| ACPI_FREE (Handler); |
| return_ACPI_STATUS (Status); |
| |
| UnlockAndExit: |
| AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); |
| (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS); |
| return_ACPI_STATUS (Status); |
| } |
| |
| ACPI_EXPORT_SYMBOL (AcpiRemoveGpeHandler) |
| |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: AcpiAcquireGlobalLock |
| * |
| * PARAMETERS: Timeout - How long the caller is willing to wait |
| * Handle - Where the handle to the lock is returned |
| * (if acquired) |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Acquire the ACPI Global Lock |
| * |
| * Note: Allows callers with the same thread ID to acquire the global lock |
| * multiple times. In other words, externally, the behavior of the global lock |
| * is identical to an AML mutex. On the first acquire, a new handle is |
| * returned. On any subsequent calls to acquire by the same thread, the same |
| * handle is returned. |
| * |
| ******************************************************************************/ |
| |
| ACPI_STATUS |
| AcpiAcquireGlobalLock ( |
| UINT16 Timeout, |
| UINT32 *Handle) |
| { |
| ACPI_STATUS Status; |
| |
| |
| if (!Handle) |
| { |
| return (AE_BAD_PARAMETER); |
| } |
| |
| /* Must lock interpreter to prevent race conditions */ |
| |
| AcpiExEnterInterpreter (); |
| |
| Status = AcpiExAcquireMutexObject (Timeout, |
| AcpiGbl_GlobalLockMutex, AcpiOsGetThreadId ()); |
| |
| if (ACPI_SUCCESS (Status)) |
| { |
| /* Return the global lock handle (updated in AcpiEvAcquireGlobalLock) */ |
| |
| *Handle = AcpiGbl_GlobalLockHandle; |
| } |
| |
| AcpiExExitInterpreter (); |
| return (Status); |
| } |
| |
| ACPI_EXPORT_SYMBOL (AcpiAcquireGlobalLock) |
| |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: AcpiReleaseGlobalLock |
| * |
| * PARAMETERS: Handle - Returned from AcpiAcquireGlobalLock |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Release the ACPI Global Lock. The handle must be valid. |
| * |
| ******************************************************************************/ |
| |
| ACPI_STATUS |
| AcpiReleaseGlobalLock ( |
| UINT32 Handle) |
| { |
| ACPI_STATUS Status; |
| |
| |
| if (!Handle || (Handle != AcpiGbl_GlobalLockHandle)) |
| { |
| return (AE_NOT_ACQUIRED); |
| } |
| |
| Status = AcpiExReleaseMutexObject (AcpiGbl_GlobalLockMutex); |
| return (Status); |
| } |
| |
| ACPI_EXPORT_SYMBOL (AcpiReleaseGlobalLock) |
| |
| #endif /* !ACPI_REDUCED_HARDWARE */ |
