I was glancing through manpages and implementations of bus_dma(9) and i am a bit unclear on what this API (in particular, bus_dmamap_sync() ) does in terms of memory barriers.
I see that the x86/amd64 and ia64 code only does the bounce buffers. The mips seems to do some coherency-related calls. How do we guarantee, say, that a recently built packet is to memory before issuing the tx command to the NIC ? cheers luigi _______________________________________________ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
