netdev - [RFC PATCH net-next 06/16] net: mscc: ocelot: use ipv6 in the aggregation code

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Message-Id: <20201208120802.1268708-7-vladimir.oltean@nxp.com>
Date:   Tue,  8 Dec 2020 14:07:52 +0200
From:   Vladimir Oltean <vladimir.oltean@....com>
To:     Tobias Waldekranz <tobias@...dekranz.com>
Cc:     "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org,
        UNGLinuxDriver@...rochip.com,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Claudiu Manoil <claudiu.manoil@....com>
Subject: [RFC PATCH net-next 06/16] net: mscc: ocelot: use ipv6 in the aggregation code

IPv6 header information is not currently part of the entropy source for
the 4-bit aggregation code used for LAG offload, even though it could be.
The hardware reference manual says about these fields:

ANA::AGGR_CFG.AC_IP6_TCPUDP_PORT_ENA
Use IPv6 TCP/UDP port when calculating aggregation code. Configure
identically for all ports. Recommended value is 1.

ANA::AGGR_CFG.AC_IP6_FLOW_LBL_ENA
Use IPv6 flow label when calculating AC. Configure identically for all
ports. Recommended value is 1.

Integration with the xmit_hash_policy of the bonding interface is TBD.

Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>
---
 drivers/net/ethernet/mscc/ocelot.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mscc/ocelot.c b/drivers/net/ethernet/mscc/ocelot.c
index 7a5c534099d3..13e86dd71e5a 100644
--- a/drivers/net/ethernet/mscc/ocelot.c
+++ b/drivers/net/ethernet/mscc/ocelot.c
@@ -1557,7 +1557,10 @@ int ocelot_init(struct ocelot *ocelot)
 	ocelot_write(ocelot, ANA_AGGR_CFG_AC_SMAC_ENA |
 			     ANA_AGGR_CFG_AC_DMAC_ENA |
 			     ANA_AGGR_CFG_AC_IP4_SIPDIP_ENA |
-			     ANA_AGGR_CFG_AC_IP4_TCPUDP_ENA, ANA_AGGR_CFG);
+			     ANA_AGGR_CFG_AC_IP4_TCPUDP_ENA |
+			     ANA_AGGR_CFG_AC_IP6_FLOW_LBL_ENA |
+			     ANA_AGGR_CFG_AC_IP6_TCPUDP_ENA,
+			     ANA_AGGR_CFG);
 
 	/* Set MAC age time to default value. The entry is aged after
 	 * 2*AGE_PERIOD
-- 
2.25.1