Adding DMA support for a device

[Avleen Vig]

I have a DVD drive which is recognised by FreeBSD:
  acd0: DVD-R <DVD-RW IDE1004> at ata1-slave PIO4

The drive supports DMA, and Windows sets it to use UDMA mode 5 (I
think), but BSD does not.
I am assume because the device is not listed as supported correct
driver?
I had a look in ata-dma.c but that file seems to be for controllers
rather than devices.

Can anyone point me in the right direction for this?

-- 
Avleen Vig
Systems Administrator
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