Re: [PATCH] firewire: Enable physical DMA above 4GB

[Stefan Richter <stefanr@s5r6.in-berlin.de>]

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/