> By the way, by userspace DMA do you mean DMA to userspace buffers, or > DMA initiated by userspace? I'm assuming the former, but if it's the > latter, how are the addresses returned from dma_map_sg communicated to > userspace?
Actually, both. Userspace deals in virtual addresses (it asks the kernel to register memory in advance, and the kernel loads the IB device with the virtual -> bus mapping). - R. _______________________________________________ openib-general mailing list openib-general@openib.org http://openib.org/mailman/listinfo/openib-general To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general
