On Wednesday, August 08/24/16, 2016 at 07:15:49 +0000, Yuval Mintz wrote:
> > +static void fill_vf_station_mac_addr(struct adapter *adap)
> > +{
> > + unsigned int i;
> > + u8 hw_addr[ETH_ALEN], macaddr[ETH_ALEN];
> > + int err;
> > + u8 *na;
> > + u16 a, b;
> > +
> > + err = t4_get_raw_vpd_params(adap, &adap->params.vpd);
> > + if (!err) {
> > + na = adap->params.vpd.na;
> > + for (i = 0; i < ETH_ALEN; i++)
> > + hw_addr[i] = (hex2val(na[2 * i + 0]) * 16 +
> > + hex2val(na[2 * i + 1]));
> > + a = (hw_addr[0] << 8) | hw_addr[1];
> > + b = (hw_addr[1] << 8) | hw_addr[2];
> > + a ^= b;
> > + a |= 0x0200; /* locally assigned Ethernet MAC address */
> > + a &= ~0x0100; /* not a multicast Ethernet MAC address */
> > + macaddr[0] = a >> 8;
> > + macaddr[1] = a & 0xff;
> > +
> > + for (i = 2; i < 5; i++)
> > + macaddr[i] = hw_addr[i + 1];
> > +
> > + for (i = 0; i < adap->num_vfs; i++) {
> > + macaddr[5] = adap->pf * 16 + i;
> > + ether_addr_copy(adap->vfinfo[i].vf_mac_addr,
> > macaddr);
> > + }
> > + }
> > +}
>
> That's some... magical magic? :-)
> But I couldn't see anywhere in the patch where this MAC is propagated
> to the VF, only to the new NDO(). Care to explain how does the VF learn it?
>
The same logic is used by the firmware to generate the MAC address for the VF.
If MAC address isn't provided through IFLA_VF_MAC. This function is only used
to populate the stationary MAC's for the VF, when user hasn't provided one.
-Hari
