DMA & POWER8

[Илья Кузнецов]

We're trying to use Slave-DMA API of the DMA Engine in the linux kernel on
POWER8 OpenPOWER platform. And we discovered that dma_request_channel() always 
fails.
Does it mean that Turismo hardware does not support Slave-DMA? Or DMA
subsystem in the linux kernel needs to be fixed, doesn't it?