Implementation of DMA driver development under Linux

The emergence of Direct Memory Access (DMA) aims to solve the problems of traditional central processing unit (CPU) processing transaction data width, transmission data bit limit, low transmission speed and so on. Using Xilinx Zynq-7000 in Field Programmable Gate Array (FPGA) to provide DMA soft core for data transmission cannot meet the specific application requirements of communication with the host computer. Because its Linux system has all the advantages of files, open source code, support for cross-platform hardware, and strong portability, the Linux system that transplants DMA driver on Zynq PS side can meet the specific requirements of communication with the host computer. And the DMA driver designed in this article serves as a bridge between Advanced RISC Machines (ARM) and FPGA to support any 4.x version of Xilinx kernel and any board using Zynq-7000 series processing system.