kernelconfig_penguin

DMA Engine support for RapidIO

configname: CONFIG_RAPIDIO_DMA_ENGINE

Linux Kernel Configuration
└─> Device Drivers
└─> RapidIO support
└─> DMA Engine support for RapidIO

Say Y here if you want to use DMA Engine frameork for RapidIO data
transfers to/from target RIO devices. RapidIO uses NREAD and
NWRITE (NWRITE_R, SWRITE) requests to transfer data between local
memory and memory on remote target device. You need a DMA controller
capable to perform data transfers to/from RapidIO.

If you are unsure about this, say Y here.