IOKit Fundamentals
Implement a driver for your custom hardware using a third-party kernel extension.
Topics
Driver Services
Driver Registry
Resources
User-Space Interactions
IOSharedDataQueueIOSharedInterruptControllerIOUserClientIOStreamUserClientIOStreamIOStreamBufferOSAction_IOUserClient_KernelCompletionOSAction_IOUserClient_KernelCompletionInterface
Debugging
Utilities
IOServiceOrderingIOFixedDivideIOFixedMultiplyIOAlignmentToSizeIOSizeToAlignmentOSSynchronizeIODriverDescriptionDriverOSRuntimeDriverOSServiceDriverServiceInfoDriverType
Reports
IOReportChannelIOReportChannelListIOReportChannelTypeIOReportElementIOReportElementValuesIOReportInterestIOReportInterestListIOHistReportInfoIOHistogramReportValuesIOHistogramSegmentConfigIONormDistReportValuesIOSimpleArrayReportValuesIOSimpleReportValuesIOStateReportInfoIOStateReportValues
Common Types
IOAccelBoundsIOAccelDeviceRegionIOAccelIDIOAccelSizeIOAccelSurfaceInformationIOAccelSurfaceReadDataIOAccelSurfaceScalingIOAddressRangeIOAddressSegmentIOAlignmentIOAppleTimingIDIOAsyncMethodIOBlockStorageDeviceExtentIOBlockStorageProvisionDeviceExtentIOByteCountIOByteCount32IOByteCount64IOCSRKeyTypeIOCacheModeIOColorComponentIOColorEntryIOCommandCodeIOCommandIDIOCommandKindIOConfigKeyTypeIODMAMapPageListIODMAMapSpecificationIODTCompareAddressCellFuncIODTNVLocationFuncIODataQueueClientDequeueEntryBlockIODataQueueClientEnqueueEntryBlockIODebuggerLinkStatusHandlerIODebuggerRxHandlerIODebuggerSetModeHandlerIODebuggerTxHandlerIODetailedTimingInformationIODetailedTimingInformationV1IODetailedTimingInformationV2IODispatchBlockIODispatchFunctionIODispatchLogFunctionIODispatchQueueCancelHandlerIODispatchQueueNameIODispatchSourceCancelHandlerIODisplayModeIDIODisplayModeInformationIODisplayProductIDIODisplayScalerInformationIODisplayTimingRangeIODisplayTimingRangeV1IODisplayTimingRangeV2IODisplayVendorIDIOEnetMulticastModeIOEnetPromiscuousModeIOEthernetAddressIOExternalAsyncMethodIOExternalMethodIOExternalMethodActionIOExternalMethodArgumentsIOExternalMethodDispatchIOExternalTrapIOFBCursorRefIOFBDPLinkConfigIOFBDisplayModeDescriptionIOFBHDRMetaDataIOFBHDRMetaDataV1IOFBInterruptProcIOFixedIOFixed1616IOFixedPoint32IOFourCharCodeIOFramebufferNotificationHandlerIOFramebufferNotificationNotifyIOGBoundsIOGPointIOGSizeIOHardwareCursorDescriptorIOHardwareCursorInfoIOIndexIOInterruptActionIOInterruptActionBlockIOInterruptDispatchSourcePayloadIOInterruptHandlerIOInterruptStateIOInterruptVectorNumberIOItemCountIOLockIOLogicalAddressIOMediaAttributeMaskIOMediaStateIOMessageIOMethodIONDRVControlParametersIONVRAMDescriptorIONamedValueIONotificationRefIOOptionBitsIOOutputActionIOPCIDeviceConfigHandlerIOPCIEventIOPCIPhysicalAddressIOPMCalendarStructIOPMDriverAssertionIDIOPMDriverAssertionLevelIOPMDriverAssertionTypeIOPMSettingControllerCallbackIOPhysicalAddressIOPhysicalAddress32IOPhysicalAddress64IOPhysicalLengthIOPhysicalLength32IOPhysicalLength64IOPhysicalRangeIOPixelApertureIOPixelEncodingIOPixelInformationIOPowerStateChangeNotificationIOPropertyNameIORPCIORPCMessageIORPCMessageErrorReturnIORPCMessageErrorReturnContentIORPCMessageMachIORWLockIORangeScalarIORecursiveLockIORegistryEntryApplierFunctionIORegistryPlaneNameIOReportCategoriesIOReportConfigureActionIOReportFormatIOReportQuantityIOReportScaleFactorIOReportUnitIOReportUnitsIOReportUpdateActionIOReturnIOSelectIOServiceIOServiceApplierFunctionIOServiceInterestContent64IOServiceInterestHandlerIOServiceInterestHandlerBlockIOServiceMatchingNotificationHandlerIOServiceMatchingNotificationHandlerBlockIOServiceNameIOServiceNotificationBlockIOServiceNotificationHandlerIOSimpleLockIOStorageAccessIOStorageAttributesIOStorageCompletionIOStorageCompletionActionIOStorageExtentIOStorageGetProvisionStatusOptionsIOStorageOptionsIOStoragePriorityIOStorageProvisionExtentIOStorageSynchronizeOptionsIOStorageUnmapOptionsIOStreamModeIOThreadIOThreadFuncIOTimeStampIntervalConstantFilteredIOTimingInformationIOTrackingCallSiteInfoIOTrapIOUserClientAsyncArgumentsArrayIOUserClientAsyncReferenceArrayIOUserClientMethodArgumentsIOUserClientMethodDispatchIOUserClientMethodFunctionIOUserClientScalarArrayIOVersionIOVideoDeviceNotificationIOVideoDeviceNotificationMessageIOVideoStreamDescriptionIOVirtualAddressIOVirtualRange