DMB vs DSB

[bastibl]

Atm, we use a DMB barrier to make sure that DMA writes are completed before launching the transfer. There is also a DSB barrier. I'm not sure if it matters or if one would be the better choice in terms of performance.

https://stackoverflow.com/questions/15491751/real-life-use-cases-of-barriers-dsb-dmb-isb-in-arm