Re: DMA API issues

[James Bottomley]

On Sun, 2004-06-20 at 13:02, Oliver Neukum wrote:
> > The DMA API is about allowing devices to transact directly with memory
> > behind the memory controller, it's an API that essentially allows the
> > I/O controller and memory controller to communicate without CPU
> > intervention.  This is still possible through the hypervisor, so the
> > iSeries currently fully implements the DMA API.
> 
> Then what's the problem?

If you look at the diagram, you'll see that the OHCI memory isn't behind
the memory controller...

James


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/