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DMA Services (cont)
Non Bus Master DMA:
- Most modern DMA devices are bus masters
- Some older devices made use of a DMA controller on
the system board
- These devices use the "DMA Engine" DDI/DKI functions
to program DMA
- See Also: ddi_dmae(9F)
Bus Masters:
- Most modern DMA devices are bus masters
- Drivers of bus masters use generic DMA functions to
extract cookies
- Drivers extract the physaddr and count and program
the device directly
See Also:
- "DMA" in Writing Device Drivers
- ddi_dma_alloc_handle(9F), ddi_dma_cookie(9S), ddi_dma_attr(9S),
ddi_dma_buf_bind_handle(9F), ddi_dma_addr_bind_handle(9F), ddi_dma_nextcookie(9F),
ddi_dma_getwin(9F), ddi_dma_sync(9F)
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