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); }
static void ACPI_SYSTEM_XFACE AcpiEvAsynchEnableGpe ( void *Context) { ACPI_GPE_EVENT_INFO *GpeEventInfo = Context; (void) AcpiEvFinishGpe (GpeEventInfo); ACPI_FREE (GpeEventInfo); return; }
static void ACPI_SYSTEM_XFACE AcpiEvAsynchEnableGpe ( void *Context) { ACPI_GPE_EVENT_INFO *GpeEventInfo = Context; ACPI_CPU_FLAGS Flags; Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); (void) AcpiEvFinishGpe (GpeEventInfo); AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); return; }
UINT32 AcpiEvGpeDispatch ( ACPI_NAMESPACE_NODE *GpeDevice, ACPI_GPE_EVENT_INFO *GpeEventInfo, UINT32 GpeNumber) { ACPI_STATUS Status; UINT32 ReturnValue; ACPI_FUNCTION_TRACE (EvGpeDispatch); /* * Always disable the GPE so that it does not keep firing before * any asynchronous activity completes (either from the execution * of a GPE method or an asynchronous GPE handler.) * * If there is no handler or method to run, just disable the * GPE and leave it disabled permanently to prevent further such * pointless events from firing. */ Status = AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_DISABLE); if (ACPI_FAILURE (Status)) { ACPI_EXCEPTION ((AE_INFO, Status, "Unable to disable GPE %02X", GpeNumber)); return_UINT32 (ACPI_INTERRUPT_NOT_HANDLED); } /* * If edge-triggered, clear the GPE status bit now. Note that * level-triggered events are cleared after the GPE is serviced. */ if ((GpeEventInfo->Flags & ACPI_GPE_XRUPT_TYPE_MASK) == ACPI_GPE_EDGE_TRIGGERED) { Status = AcpiHwClearGpe (GpeEventInfo); if (ACPI_FAILURE (Status)) { ACPI_EXCEPTION ((AE_INFO, Status, "Unable to clear GPE %02X", GpeNumber)); (void) AcpiHwLowSetGpe ( GpeEventInfo, ACPI_GPE_CONDITIONAL_ENABLE); return_UINT32 (ACPI_INTERRUPT_NOT_HANDLED); } } /* * Dispatch the GPE to either an installed handler or the control * method associated with this GPE (_Lxx or _Exx). If a handler * exists, we invoke it and do not attempt to run the method. * If there is neither a handler nor a method, leave the GPE * disabled. */ switch (ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags)) { case ACPI_GPE_DISPATCH_HANDLER: /* Invoke the installed handler (at interrupt level) */ ReturnValue = GpeEventInfo->Dispatch.Handler->Address ( GpeDevice, GpeNumber, GpeEventInfo->Dispatch.Handler->Context); /* If requested, clear (if level-triggered) and reenable the GPE */ if (ReturnValue & ACPI_REENABLE_GPE) { (void) AcpiEvFinishGpe (GpeEventInfo); } break; case ACPI_GPE_DISPATCH_METHOD: case ACPI_GPE_DISPATCH_NOTIFY: /* * Execute the method associated with the GPE * NOTE: Level-triggered GPEs are cleared after the method completes. */ Status = AcpiOsExecute (OSL_GPE_HANDLER, AcpiEvAsynchExecuteGpeMethod, GpeEventInfo); if (ACPI_FAILURE (Status)) { ACPI_EXCEPTION ((AE_INFO, Status, "Unable to queue handler for GPE %02X - event disabled", GpeNumber)); } break; default: /* * No handler or method to run! * 03/2010: This case should no longer be possible. We will not allow * a GPE to be enabled if it has no handler or method. */ ACPI_ERROR ((AE_INFO, "No handler or method for GPE %02X, disabling event", GpeNumber)); break; } return_UINT32 (ACPI_INTERRUPT_HANDLED); }