zynq-linux-dma

A user space DMA example on Zynq platform (ZC706) under Petalinux.

Environment Requirement

EDK Versions

Vivado 2014.4 with corresponding Petalinux SDK.

Hardware Platform

ZC706 Evaluation Board.

Hardware Architecture

This project implements a self-looped DMA connecting with both PL and PS DDRs. The PL DDR is invisible to Linux running on PS. Data can be moved between (1) PS and PL DDRs, (2) PS and PS DDRs, and (3) PL and PL DDRs from programs in user space. The hardware can be built from the hw/system.tcl.

Software Flow

Create Modules

petalinux-create -t modules --name xdma --enable

Replace files in ./component/modules/xdma with those from sw/modules/xdma.

Create Apps

petalinux-create -t apps --name xdma-demo --enable

Replace files in ./component/apps/xdma-demo with those from sw/apps/xdma-demo.

Build Projects

petalinux-built

Run Deme

After booting kernel, we can load drivers and run demos.

insmod /lib/modules/`uname -r`/extra/xdma.ko

Run the demo:

/bin/xdma-demo

Acknowledgement

Thanks for bmartini and John. This is a improved version of bmartini's, and an implementation of John's idea.

Currently, I'm adding multi-process support and dynamically allocation of kernel space.