Re: [PATCH net-next] net: ethernet: ti: cpsw: don't flush mcast entries while switch promisc mode
From: Grygorii Strashko <grygorii.strashko@ti.com>
Date: 2018-10-19 00:03:12
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On 10/18/18 1:00 PM, Ivan Khoronzhuk wrote:
No need now to flush mcast entries in switch mode while toggling to promiscuous mode. It's not needed as vlan reg_mcast = ALL_PORTS and mcast/vlan ports = ALL_PORTS, the same happening for vlan unreg_mcast, it's set to ALL_PORT_MASK just after calling promisc mode routine by calling set allmulti. I suppose main reason to flush them is to use unreg_mcast to receive all to host port. Thus, now, all mcast packets are received anyway and no reason to flush mcast entries unsafely, as they were synced with __dev_mc_sync() previously and are not restored. Another way is to _dev_mc_unsync() them, but no need.
User have possibility to add additional mcast entries or edit existing in switch-mode, which is now done using custom tool. So, Host in promisc mode will not receive packets for mcast address X if port mask for this addr set to (ALL_PORTS - HOST_PORT). Am I missing smth?
quoted hunk ↗ jump to hunk
Signed-off-by: Ivan Khoronzhuk <redacted> --- Based on net-next/master Tasted on am572x EVM and BBB drivers/net/ethernet/ti/cpsw.c | 3 --- 1 file changed, 3 deletions(-)diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c index 226be2a56c1f..0e475020a674 100644 --- a/drivers/net/ethernet/ti/cpsw.c +++ b/drivers/net/ethernet/ti/cpsw.c@@ -638,9 +638,6 @@ static void cpsw_set_promiscious(struct net_device *ndev, bool enable) } while (time_after(timeout, jiffies)); cpsw_ale_control_set(ale, 0, ALE_AGEOUT, 1); - /* Clear all mcast from ALE */ - cpsw_ale_flush_multicast(ale, ALE_ALL_PORTS, -1); - /* Flood All Unicast Packets to Host port */ cpsw_ale_control_set(ale, 0, ALE_P0_UNI_FLOOD, 1); dev_dbg(&ndev->dev, "promiscuity enabled\n");
-- regards, -grygorii