Re: [RFC PATCH net-next 2/2] net: dsa: felix: offload port priority

From: Vladimir Oltean <vladimir.oltean@nxp.com>

Even though we should really share the implementation with the ocelot
switchdev driver, that one needs a little bit of rework first, since its
struct ocelot_port_tc only supports one tc matchall action at a time,
which at the moment is used for port policers. Whereas DSA keeps a list
of port-based actions in struct dsa_slave_priv::mall_tc_list, so it is
much more easily extensible. It is too tempting to add the implementation
for the port priority directly in Felix at the moment, which is what we
do.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
---
 drivers/net/dsa/ocelot/felix.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/net/dsa/ocelot/felix.c b/drivers/net/dsa/ocelot/felix.c
index 768a74dc462a..5cc42c3aaf0d 100644
--- a/drivers/net/dsa/ocelot/felix.c
+++ b/drivers/net/dsa/ocelot/felix.c

@@ -739,6 +739,20 @@ static void felix_port_policer_del(struct dsa_switch *ds, int port)
 	ocelot_port_policer_del(ocelot, port);
 }
 
+static int felix_port_priority_set(struct dsa_switch *ds, int port,
+				   struct dsa_mall_skbedit_tc_entry *skbedit)
+{
+	struct ocelot *ocelot = ds->priv;
+
+	ocelot_rmw_gix(ocelot,
+		       ANA_PORT_QOS_CFG_QOS_DEFAULT_VAL(skbedit->priority),