Scatter Gather DMA

["mjander " <mjander@embedded.cl>]

Hi,

Another question... :)

The Aureal Vortex has Scatter Gather DMA's for each audio channel.
But these SG DMA
support only max 4 pages. Each page can have a programable size of
upto 4 KB.
I was studying the ALSA SG scheme and it doesnt seme to fit into
the aureal vortex
SG buffer scheme, because ALSA, as far as i understood, only
allows pages of the kernel PAGE_SIZE size, and allocates as many
pages (without cound limit ?) until the buffer size is  reached.
But the PAGE_SIZE around 0x400 or 0x800, which is rather small.

On the Aureal vortex soundcard side i have 4 registers for page
base address, and some sort  of config regs to configure each page
size and the next page for each page. I just dont understand how
could i plug this two apparently incompatible things together.

Thank you very much.

Manuel Jander.
.
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