RING_DMA_FADD
addr = ENGINE_READ64(engine, RING_DMA_FADD, RING_DMA_FADD_UDW);
addr = ENGINE_READ(engine, RING_DMA_FADD);
{ RING_DMA_FADD(0), 0, 0, "RING_DMA_FADD_LDW" }, \
ee->faddr = ENGINE_READ(engine, RING_DMA_FADD);
ee->dma_faddr_lo = ENGINE_READ(engine, RING_DMA_FADD);
MMIO_RING_D(RING_DMA_FADD);