OPAE Intel FPGA Linux Device Driver Architecture Guide

ID 683857
Date 10/02/2017
Public
Document Table of Contents

1.1.3. Accelerator Function (AF) Unit

An Accelerator Function (AF) Unit is attached to a Port and exposes a 256K MMIO region to be used for accelerator-specific control registers.

User-space applications can acquire exclusive access to an AFU attached to a Port by using open() on the Port device, and release it using close().

User-space applications can also mmap() accelerator MMIO regions.