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nfp: add basic multicast filtering

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We currently always pass all multicast traffic through.
Only set L2MC when actually needed.  Since the driver
was not making use of the capability to filter out mcast
frames, some FW projects don't implement it any more.
Don't warn users if capability is not present (like we
do for promisc flag).  The lack of L2MC capability is
assumed to mean all multicast traffic goes through.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jakub Kicinski 2018-01-04 16:10:19 +01:00 committed by David S. Miller
parent ad521763e6
commit d0adb51edb
1 changed files with 5 additions and 2 deletions
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7
drivers/net/ethernet/netronome/nfp/nfp_net_common.c
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@ -2850,6 +2850,11 @@ static void nfp_net_set_rx_mode(struct net_device *netdev)
new_ctrl = nn->dp.ctrl;
if (!netdev_mc_empty(netdev) || netdev->flags & IFF_ALLMULTI)
new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_L2MC;
else
new_ctrl &= ~NFP_NET_CFG_CTRL_L2MC;
if (netdev->flags & IFF_PROMISC) {
if (nn->cap & NFP_NET_CFG_CTRL_PROMISC)
new_ctrl |= NFP_NET_CFG_CTRL_PROMISC;
@ -3787,8 +3792,6 @@ int nfp_net_init(struct nfp_net *nn)
/* Allow L2 Broadcast and Multicast through by default, if supported */
if (nn->cap & NFP_NET_CFG_CTRL_L2BC)
nn->dp.ctrl |= NFP_NET_CFG_CTRL_L2BC;
if (nn->cap & NFP_NET_CFG_CTRL_L2MC)
nn->dp.ctrl |= NFP_NET_CFG_CTRL_L2MC;
/* Allow IRQ moderation, if supported */
if (nn->cap & NFP_NET_CFG_CTRL_IRQMOD) {