mapping small parts of a pci card to conserve KVA

[Daniel O'Connor]

On Wed, 16 Feb 2005 07:23, Warner Losh wrote:
> > At least on 5.3R, I seem to get back the same struct resource * from
> > each call.  rman_get_virtual() returns a different kva for each
> > mapping, yet they all seem to map to the same physical address.
> > Eg, I call vtophys() on the results of rman_get_virtual(),
> > for each segment, and they all map to 0xf9000000.
> >
> > Is there a way to just map what I need?
>
> There's no way to map part of a resource currently.  I'd like to
> create an API to do that, since it would be useful for a lot of
> things, but none exists today.  As soon as bus_activate_resource is
> called, it gets mapped.

You could do something like puc does and attach a child driver to part of it 
right?

(Stab in dark :)

-- 
Daniel O'Connor software and network engineer
for Genesis Software - http://www.gsoft.com.au
"The nice thing about standards is that there
are so many of them to choose from."
  -- Andrew Tanenbaum
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