svn commit: r264646 - head/sys/dev/netfpga10g/nf10bmac
Ian Lepore
ian at FreeBSD.org
Fri Apr 18 14:28:41 UTC 2014
On Fri, 2014-04-18 at 14:21 +0000, Bjoern A. Zeeb wrote:
> Author: bz
> Date: Fri Apr 18 14:21:10 2014
> New Revision: 264646
> URL: http://svnweb.freebsd.org/changeset/base/264646
>
> Log:
> Now that I figured out where the ethernet addresses come from
> on NetFPGA-10G, assign one to the interface by default in a very
> similar way.
>
> MFC after: 6 days
> X-Easter-Egg-Hunt: yes
>
> Modified:
> head/sys/dev/netfpga10g/nf10bmac/if_nf10bmac.c
>
> Modified: head/sys/dev/netfpga10g/nf10bmac/if_nf10bmac.c
> ==============================================================================
> --- head/sys/dev/netfpga10g/nf10bmac/if_nf10bmac.c Fri Apr 18 12:51:30 2014 (r264645)
> +++ head/sys/dev/netfpga10g/nf10bmac/if_nf10bmac.c Fri Apr 18 14:21:10 2014 (r264646)
> @@ -446,7 +446,25 @@ static int
> nf10bmac_reset(struct nf10bmac_softc *sc)
> {
>
> - /* Currently we cannot do anything. */
> + /*
> + * If we do not have an ether address set, initialize to the same
> + * OUI as NetFPGA-10G Linux driver does (which luckily seems
> + * unallocated). We just change the NIC specific part from
> + * the slightly long "\0NF10C0" to "\0NFBSD".
> + * Oh and we keep the way of setting it from a string as they do.
> + * It's an amazing way to hide it.
> + * XXX-BZ If NetFPGA gets their own OUI we should fix this.
> + */
> + if (sc->nf10bmac_eth_addr[0] == 0x00 &&
> + sc->nf10bmac_eth_addr[1] == 0x00 &&
> + sc->nf10bmac_eth_addr[2] == 0x00 &&
> + sc->nf10bmac_eth_addr[3] == 0x00 &&
> + sc->nf10bmac_eth_addr[4] == 0x00 &&
> + sc->nf10bmac_eth_addr[5] == 0x00) {
> + memcpy(&sc->nf10bmac_eth_addr, "\0NFBSD", ETHER_ADDR_LEN);
> + sc->nf10bmac_eth_addr[5] += sc->nf10bmac_unit;
> + }
> +
> return (0);
> }
>
>
For other drivers/socs where we need to cook up an address on the fly,
we've used "bsd" as the OUI and a 24-bit random for the low order.
Aside from the nice aesthetic, 'bsd' has the "locally administered" bit
set and thus is g'teed to not clash with any globally assigned OUI.
-- Ian
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