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I/O Request handling Driver Initialization Hardware preparation H/W Interaction Pnp/Power Interaction Driver Cleanup

WDFOBJECT Methods Events Properties WDF functions that operate on objects Where you can register callbacks Single values accessible via get/set methods

Driver (WDFDRIVER) Device (WDFDEVICE) … Queue (WDFQUEUE) … Wdf. Request. Complete. With. Information( Request, STATUS_INVALID_DEVICE_REQUEST, (ULONG_PTR) 0 );

I/O Request handling Driver Initialization Hardware preparation H/W Interaction Pnp/Power Interaction Driver Cleanup

Wdf. Driver. Create ( Raw. Driver. Object, […] , attributes, &driver )

NTSTATUS Driver. Entry( _In_ PDRIVER_OBJECT Driver. Object, _In_ PUNICODE_STRING Registry. Path ) { […] // Create WDF Driver Object WDF_OBJECT_ATTRIBUTES_INIT(&attributes); attributes. Evt. Driver. Unload = On. Driver. Unload; WDF_DRIVER_CONFIG_INIT(&config, On. Device. Add); status = Wdf. Driver. Create(Driver. Object, Registry. Path, &attributes, &config, &driver ); } Declare vars WDF Event WDF Method WDF Object

NTSTATUS On. Device. Add( WDFDRIVER Driver, PWDFDEVICE_INIT Device. Init ) { WDFDEVICE device; IWDFIo. Queue * p. Default. Queue = NULL; Device. Init->Set. Power. Policy. Ownership(TRUE); status = Wdf. Device. Create(&Device. Init, &device. Attributes, &device); context = Get. Context(device); context->Wdf. Device = device; status = p. IWDFDevice->Create. Io. Queue( NULL, TRUE, Wdf. Io. Queue. Dispatch. Parallel, TRUE, FALSE, &p. Default. Queue ); return status; } Static Configuration Device Create Setting Context Queue Create

I/O Request handling Driver Initialization Hardware preparation H/W Interaction Pnp/Power Interaction Driver Cleanup

Get hardware resources, Do some static configuration, (Prepare. Hardware) Enter powered state (D 0 Entry) Enable interrupts (Interrupt. Enable) …

Get hardware resources, Do some static configuration, (Prepare. Hardware) NTSTATUS On. Prepare. Hardware( WDFDEVICE Device, WDFCMRESLIST Resources. Raw, WDFCMRESLIST Resources. Translated ) { int Resource. Count = Wdf. Cm. Resource. List. Get. Count( Resources. Translated ); for (i=0; i < Resource. Count; i++) { Enter powered state (D 0 Entry) descriptor = Wdf. Cm. Resource. List. Get. Descriptor( Resources. Translated, i); switch(descriptor->Type) { case Cm. Resource. Type. Port: […] case Cm. Resource. Type. Memory: […] case Cm. Resource. Type. Interrupt: […] default: break; } Enable interrupts (Interrupt. Enable) … } return STATUS_SUCCESS; }

Get hardware resources, Do some static configuration, (Prepare. Hardware) Enter powered state (D 0 Entry) NTSTATUS On. D 0 Entry( IN WDFDEVICE Device, IN WDF_POWER_DEVICE_STATE Recent. Power. State ){ PADXL 345 Acc. Device p. Acc. Device = nullptr p. Acc. Device = Get. Context(Device); Wdf. Wait. Lock. Acquire(p. Acc. Device->m_Wait. Lock); I 2 CSensor. Write. Register( p. Acc. Device->m_I 2 CIo. Target, MY_REGISTER, MY_VALUE, sizeof(MY_VALUE) ); Enable interrupts (Interrupt. Enable) … p. Acc. Device->m_Powered. On = true; Wdf. Wait. Lock. Release(p. Acc. Device->m_Wait. Lock); return STATUS_SUCCESS; }

Get hardware resources, Do some static configuration, (Prepare. Hardware) NTSTATUS On. Interrupt. Enable( IN WDFINTERRUPT Interrupt, IN WDFDEVICE Device){ PDEVICE_EXTENSION ULONG reg. Ulong; PULONG int. Csr; Enter powered state (D 0 Entry) dev. Ext; dev. Context = Get. Device. Context( Wdf. Interrupt. Get. Device(Interrupt) ); int. Reg. Id = &dev. Context->Int. Register. Id Enable interrupts (Interrupt. Enable) reg. Val = READ_REGISTER_ULONG( int. Reg. Id ); reg. Val = ENABLE_INTERRUPT_BYTE( reg. Val ); WRITE_REGISTER_ULONG( int. Reg. Id, reg. Val ); … return STATUS_SUCCESS; }

Get hardware resources, Do some static configuration, (Prepare. Hardware) Enter powered state (D 0 Entry) Enable interrupts (Interrupt. Enable) …

I/O Request handling Driver Initialization Hardware preparation H/W Interaction Pnp/Power Interaction Driver Cleanup

IRP I/O WDFREQUEST Dispatcher Queue Selection Execution Level & Sync Scope Power Management WDFREQUEST Driver’s On. Read

I/O ead R IRPs I/O Dispatcher Write IOC TL I/O Dispatcher Queue Selection Execution Level & Sync Scope Power Management Parallel WDFREQUEST Sequential WDFREQUEST Manual WDFREQUEST Driver’s On. Read

I/O Dispatcher Queue Selection Execution Level & Sync Scope Power Management Driver’s On. Read IRQL: Interrupt Request Level (PASSIVE_LEVEL, DISPATCH_LEVEL) Execution Level: IRQL at which event callbacks are invoked Synchronization Scope: Mechanism for enforcing serialization of callback execution by managing locks Device Scope: Synchronization of callbacks for a device’s queue and file objects Queue Scope: Synchronization of callbacks for a queue None: No synchronization

I/O Dispatcher Queue Selection Execution Level & Sync Scope Power Management Driver’s On. Read

Wdf. Request. Mark. Cancelable ( Request, On. Request. Cancel );

I/O Request handling Driver Initialization Hardware preparation H/W Interaction Pnp/Power Interaction Driver Cleanup

Wdf. Io. Target. Send. Ioctl. Synchronously( io. Target, NULL, IOCTL_ACPI_ASYNC_EVAL_METHOD, &input. Buf. Desc, &output. Buf. Desc, NULL);

I/O Request handling Driver Initialization Hardware preparation H/W Interaction Pnp/Power Interaction Driver Cleanup

WDF_DEVICE_POWER_POLICY_WAKE_SETTINGS_INIT(&wake. Settings); Wdf. Device. Assign. Sx. Wake. Settings( device, &wake. Settings );

I/O Request handling Driver Initialization Hardware preparation H/W Interaction Pnp/Power Interaction Driver Cleanup

WDF on Git. Hub! Available starting tomorrow Includes KMDF and UMDF v 2 Published under MIT License

Developing Drivers with Windows Driver Foundation Kernel-Mode Driver Framework Design Guide User-Mode Driver Framework Design Guide Choosing a driver model A basic “Toaster” sample (UMDF 2) Echo driver sample, showing queues and IOCTLS (KMDF) USB FX 2 Function Driver (UMDF 2)

Grand Ballroom III 12: 30 Introduction to Hardware Lifecycle 13: 40 Tools for Windows Driver Development 15: 00 Intro to Windows Driver Development 16: 10 Writing Drivers with the WDF Mansion VIII <Day 2> Lab: Getting Started with Driver Dev 10: 30 11: 30 Lunch 12: 30 Accessing GPIO, I 2 C, and UART devices Lab: Driver Testing and Debugging 13: 40 Driver Testing and Debugging Lab: Sensor Driver on Sharks Cove 15: 00 Testing with the Hardware Lab Kit Lab: Sensor Driver on Sharks Cove 16: 10 Intro to Driver Signing, Distribution, Servicing Lab: Testing with the Hardware Lab Kit 17: 20 <Day 3> 09: 00 Lab: Getting Started with Driver Dev 10: 10 Lab: Driver Testing and Debugging

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