Chapter 8: IO Flow and Dispatching

Overview

I/O processing is the heart of any driver. To understand how to implement robust I/O handling code in your driver, you must understand how I/O requests flow from an application to your driver, how WDF simplifies the driver's I/O processing tasks, and what your driver should do to complete an I/O request.

For this chapter, you need …	From …
Samples
AMCC5933	%wdk%\Src\Kmdf\AMCC5933
Featured Toaster	%wdk%\Src\Kmdf\Toaster\Func\Featured
Fx2_Driver	%wdk%\Src\Umdf\Usb\Fx2_driver
Nonpnp	%wdk%\Src\Kmdf\Nonpnp
Osrusbfx2	%wdk%\src\Kmdf\Osrusbfx2
Pcidrv	%wdk%\Src\Kmdf\Pcidrv
USB\Filter	%wdk%\Src\Umdf\Usb\Filter
WpdWudfSampleDriver	%wdk%\Src\Umdf\Wpd\WpdWudfSampleDriver
WDK documentation
Handling I/O Requests in Framework-based Drivers	http://go.microsoft.com/fwlink/?LinkId=80613
Other
"I/O Completion/Cancellation Guidelines" on the WHDC Web site	http://go.microsoft.com/fwlink/?LinkId=82321