Generic DMA engine framework for FreeBSD

by Jakub Klama for The FreeBSD Project

The aim of this project is to provide a generic, flexible framework for initiating and controlling DMA transfers using General Purpose DMA engines, found in most of embedded SoCs - along with tests and documentation. There are analogous frameworks for NetBSD (dmover(4)) and Solaris (ddi_dmae(9F)), but they are not well suited for embedded targets and don't offer all required features.