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SubjectRe: [PATCH] firewire: Enable physical DMA above 4GB
On Mar 26 Stefan Richter wrote:
> On Mar 26 Peter Hurley wrote:
> > On Tue, 2013-03-26 at 19:56 +0100, Stefan Richter wrote:
> > > It has been a long time though since I last checked whether PhyUpperBound
> > > is implemented; maybe it has become more widespread than it was back then.
> > >
> > > Or maybe it hasn't: All OHCI-1394 chips that ever came to market are 32
> > > bit chips anyway. So the few rare ones that do support PhyUpperBound
> > > larger than 4 GB cannot in fact use it.
> > >
> > > Or am I severely behind the times about this?
> >
> > The FW643e-2 is natively PCIe (not behind a bridge) and supports phys
> > DMA past 4GB (the datasheet says all 48 bits but I can only test it out
> > to 10GB).
> >
> > I thought the FW643e was as well? You'll have to test that out :)
>
> OK, will do.

Does lspci or something similar show which PCI devices are capable of 64 bit
wide addressing?
--
Stefan Richter
-=====-===-= --== ===-=
http://arcgraph.de/sr/


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