---
title: PCIDriverKit
framework: pcidriverkit
role: collection
role_heading: Framework
path: pcidriverkit
---

# PCIDriverKit

Develop device drivers for Peripheral Component Interconnect (PCI) accessories.

## Mentioned in

Creating Custom PCIe Drivers for Thunderbolt Devices

## Overview

Overview Use the PCIDriverKit framework to develop drivers that manage custom features on your Peripheral Component Interconnect (PCI) and PCI-Express hardware. When the system loads your custom PCI driver, it passes an IOPCIDevice object as the provider to your driver. Use that object to read and write the configuration and memory of your PCI hardware. On macOS, use the System Extensions framework to install and upgrade your driver. On iPadOS, the system automatically discovers and upgrades drivers along with their host apps. note: PCIDriverKit is available on macOS for Intel and Apple Silicon devices, and on iPadOS for devices with an M-series chip.

## Topics

### Entitlements

- [com.apple.developer.driverkit.transport.pci](bundleresources/entitlements/com.apple.developer.driverkit.transport.pci.md)

### Samples

- [DriverKit sample code](driverkit/driverkit-sample-code.md)
- [Connecting a network driver](pcidriverkit/connecting-a-network-driver.md)

### Device Interface

- [Creating Custom PCIe Drivers for Thunderbolt Devices](pcidriverkit/creating-custom-pcie-drivers-for-thunderbolt-devices.md)
- [IOPCIDevice](pcidriverkit/iopcidevice.md)

### Reference

- [PCIDriverKit Enumerations](pcidriverkit/pcidriverkit-enumerations.md)
- [PCIDriverKit Data Types](pcidriverkit/pcidriverkit-data-types.md)
- [PCIDriverKit Macros](pcidriverkit/pcidriverkit-macros.md)

### Macros

- [kIOPCIACSCapabilitiesKey](pcidriverkit/kiopciacscapabilitieskey.md)
- [kIOPCIAERCapabilitiesKey](pcidriverkit/kiopciaercapabilitieskey.md)
- [kIOPCIExpressDeviceCapabilities2Key](pcidriverkit/kiopciexpressdevicecapabilities2key.md)
- [kIOPCIExpressDeviceCapabilitiesKey](pcidriverkit/kiopciexpressdevicecapabilitieskey.md)
- [kIOPCIExpressLinkCapabilities2Key](pcidriverkit/kiopciexpresslinkcapabilities2key.md)
- [kIOPCIExpressRootCapabilitiesKey](pcidriverkit/kiopciexpressrootcapabilitieskey.md)
- [kIOPCIExpressSlotCapabilities2Key](pcidriverkit/kiopciexpressslotcapabilities2key.md)
- [kIOPCIFPBCapabilitiesKey](pcidriverkit/kiopcifpbcapabilitieskey.md)
- [kIOPCIL1PMCapabilitiesKey](pcidriverkit/kiopcil1pmcapabilitieskey.md)
- [kIOPCIMSIMessageControlKey](pcidriverkit/kiopcimsimessagecontrolkey.md)
- [kIOPCIMSIXMessageControlKey](pcidriverkit/kiopcimsixmessagecontrolkey.md)
- [kIOPCIPTMCapabilitiesKey](pcidriverkit/kiopciptmcapabilitieskey.md)
- [kIOPCIPowerManagementCapabilitiesKey](pcidriverkit/kiopcipowermanagementcapabilitieskey.md)

### Enumeration Cases

- [kIOPCICapabilityIDAF](pcidriverkit/kiopcicapabilityidaf.md)
- [kIOPCICapabilityIDEnhancedAllocation](pcidriverkit/kiopcicapabilityidenhancedallocation.md)
- [kIOPCICapabilityIDSATAConfiguration](pcidriverkit/kiopcicapabilityidsataconfiguration.md)
- [kIOPCIExpressCapabilityIDAMD](pcidriverkit/kiopciexpresscapabilityidamd.md)
- [kIOPCIExpressCapabilityIDATS](pcidriverkit/kiopciexpresscapabilityidats.md)
- [kIOPCIExpressCapabilityIDAlternateProtocol](pcidriverkit/kiopciexpresscapabilityidalternateprotocol.md)
- [kIOPCIExpressCapabilityIDCAC](pcidriverkit/kiopciexpresscapabilityidcac.md)
- [kIOPCIExpressCapabilityIDDPA](pcidriverkit/kiopciexpresscapabilityiddpa.md)
- [kIOPCIExpressCapabilityIDDPC](pcidriverkit/kiopciexpresscapabilityiddpc.md)
- [kIOPCIExpressCapabilityIDDVSEC](pcidriverkit/kiopciexpresscapabilityiddvsec.md)
- [kIOPCIExpressCapabilityIDDataLinkFeature](pcidriverkit/kiopciexpresscapabilityiddatalinkfeature.md)
- [kIOPCIExpressCapabilityIDFRSQueueing](pcidriverkit/kiopciexpresscapabilityidfrsqueueing.md)
- [kIOPCIExpressCapabilityIDHierarchyID](pcidriverkit/kiopciexpresscapabilityidhierarchyid.md)
- [kIOPCIExpressCapabilityIDLNR](pcidriverkit/kiopciexpresscapabilityidlnr.md)
- [kIOPCIExpressCapabilityIDLaneMarginingRx](pcidriverkit/kiopciexpresscapabilityidlanemarginingrx.md)
- [kIOPCIExpressCapabilityIDMFVC](pcidriverkit/kiopciexpresscapabilityidmfvc.md)
- [kIOPCIExpressCapabilityIDMPCIe](pcidriverkit/kiopciexpresscapabilityidmpcie.md)
- [kIOPCIExpressCapabilityIDMRIOV](pcidriverkit/kiopciexpresscapabilityidmriov.md)
- [kIOPCIExpressCapabilityIDMulticast](pcidriverkit/kiopciexpresscapabilityidmulticast.md)
- [kIOPCIExpressCapabilityIDNPEM](pcidriverkit/kiopciexpresscapabilityidnpem.md)
- [kIOPCIExpressCapabilityIDPASID](pcidriverkit/kiopciexpresscapabilityidpasid.md)
- [kIOPCIExpressCapabilityIDPL16GTs](pcidriverkit/kiopciexpresscapabilityidpl16gts.md)
- [kIOPCIExpressCapabilityIDPL32GTs](pcidriverkit/kiopciexpresscapabilityidpl32gts.md)
- [kIOPCIExpressCapabilityIDPMUX](pcidriverkit/kiopciexpresscapabilityidpmux.md)
- [kIOPCIExpressCapabilityIDPRI](pcidriverkit/kiopciexpresscapabilityidpri.md)
- [kIOPCIExpressCapabilityIDRCECEndpointAssociation](pcidriverkit/kiopciexpresscapabilityidrcecendpointassociation.md)
- [kIOPCIExpressCapabilityIDRCInternalLinkCtrl](pcidriverkit/kiopciexpresscapabilityidrcinternallinkctrl.md)
- [kIOPCIExpressCapabilityIDRCLinkDeclaration](pcidriverkit/kiopciexpresscapabilityidrclinkdeclaration.md)
- [kIOPCIExpressCapabilityIDReadinessTimeReporting](pcidriverkit/kiopciexpresscapabilityidreadinesstimereporting.md)
- [kIOPCIExpressCapabilityIDResizableBAR](pcidriverkit/kiopciexpresscapabilityidresizablebar.md)
- [kIOPCIExpressCapabilityIDRootComplexRegBlock](pcidriverkit/kiopciexpresscapabilityidrootcomplexregblock.md)
- [kIOPCIExpressCapabilityIDSFI](pcidriverkit/kiopciexpresscapabilityidsfi.md)
- [kIOPCIExpressCapabilityIDSPCIe](pcidriverkit/kiopciexpresscapabilityidspcie.md)
- [kIOPCIExpressCapabilityIDSRIOV](pcidriverkit/kiopciexpresscapabilityidsriov.md)
- [kIOPCIExpressCapabilityIDTPHRequester](pcidriverkit/kiopciexpresscapabilityidtphrequester.md)
- [kIOPCIExpressCapabilityIDVC_MFVCPresent](pcidriverkit/kiopciexpresscapabilityidvc_mfvcpresent.md)
- [kIOPCIExpressCapabilityIDVFResizableBAR](pcidriverkit/kiopciexpresscapabilityidvfresizablebar.md)
- [kIOPCIExpressCapabilityIDVSEC](pcidriverkit/kiopciexpresscapabilityidvsec.md)
- [kIOPCISlotStatusAttentionButtonPressed](pcidriverkit/kiopcislotstatusattentionbuttonpressed.md)
- [kIOPCISlotStatusCommandCompleted](pcidriverkit/kiopcislotstatuscommandcompleted.md)
- [kIOPCISlotStatusDataLinkLayerStateChanged](pcidriverkit/kiopcislotstatusdatalinklayerstatechanged.md)
- [kIOPCISlotStatusElectromechanicalInterlockState](pcidriverkit/kiopcislotstatuselectromechanicalinterlockstate.md)
- [kIOPCISlotStatusMRLSensorChanged](pcidriverkit/kiopcislotstatusmrlsensorchanged.md)
- [kIOPCISlotStatusMRLSensorState](pcidriverkit/kiopcislotstatusmrlsensorstate.md)
- [kIOPCISlotStatusPowerFaultDetected](pcidriverkit/kiopcislotstatuspowerfaultdetected.md)
- [kIOPCISlotStatusPresenceDetectChanged](pcidriverkit/kiopcislotstatuspresencedetectchanged.md)
- [kIOPCISlotStatusPresenceDetectState](pcidriverkit/kiopcislotstatuspresencedetectstate.md)