http://www.fpgadeveloper.com/2014/08/using-the-axi-dma-in-vivado.html
A. ポーリング
B. 割り込み
> Our software application will test the DMA in polling mode, but to be able to use it in interrupt mode, we need to connect the interrupts ‘mm2s_introut’ and ‘s2mm_introut’ to the Zynq PS.