cam: big transfers

[Nate Lawson]

On Wed, 9 Apr 2003, Kenneth D. Merry wrote:
> > Not currently, no.  You'd need to do some hacking around in
> > cam_periph_mapmem() to allow for larger buffers.  It actually checks
> > against DFLTPHYS (64K) at the moment, not MAXPHYS, since some adapters
> > (e.g. the Adaptec 1542) can't handle more than 17 S/G segments.

I believe he is working with targ(4).  I am working on updating the
usermode example to use O_DIRECT and some other optimizations.  But first
it needs to be more stable.  I have some fixes for that too.

-Nate