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Date: Fri, 29 Mar 2013 11:44:09 +0100 From: Stefan Richter <stefanr@...6.in-berlin.de> To: Stefan Richter <stefanr@...6.in-berlin.de> Cc: Peter Hurley <peter@...leysoftware.com>, linux1394-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org, Clemens Ladisch <clemens@...isch.de> Subject: Re: [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/ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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