Support for DMA engines

modulename: dmaengine.ko

configname: CONFIG_DMA_ENGINE

Linux Kernel Configuration
└─>Device Drivers
└─>DMA Engine support
└─>Support for DMA engines
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
DMA engines offload copy operations from the CPU to dedicated
hardware, allowing the copies to happen asynchronously.

source code:
drivers/dma/dmaengine.c
depends
 or CONFIG_DMADEVICES