From: Andi Kleen <[EMAIL PROTECTED]> Date: Tue, 13 Jun 2006 06:54:14 +0200
> I guess if you use 1394 with remote DMA for other protocols (like > video etc.) there must be some way for the subsystem to map > the memory even on IOMMU systems. I admit I haven't dived that > deeply into the 1394 subsystem so I don't know how that works. Video-1394 has it's own driver, which does a consistent DMA allocation, and then maps that into userspace using remap_pfn_range(). Entirely portable. Strangely I don't even see any bus_to_virt() etc. calls in the raw1394 driver, just these ptr2int() things... - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
