[RFC PATCH net-next 15/16] net: dsa: felix: propagate the LAG offload ops towards the ocelot lib

[Vladimir Oltean <vladimir.oltean@nxp.com>]

The ocelot switch has been supporting LAG offload since its initial
commit, however felix could not make use of that, due to lack of a LAG
abstraction in DSA. Now that we have that, let's forward DSA's calls
towards the ocelot library, who will deal with setting up the bonding.

Note that ocelot_port_lag_leave can return an error due to memory
allocation but we are currently ignoring that, because the DSA method
returns void.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
---
 drivers/net/dsa/ocelot/felix.c     | 27 +++++++++++++++++++++++++++
 drivers/net/ethernet/mscc/ocelot.c |  1 +
 drivers/net/ethernet/mscc/ocelot.h |  6 ------
 include/soc/mscc/ocelot.h          |  6 ++++++
 4 files changed, 34 insertions(+), 6 deletions(-)

diff --git a/drivers/net/dsa/ocelot/felix.c b/drivers/net/dsa/ocelot/felix.c
index 7dc230677b78..53ed182fac12 100644
--- a/drivers/net/dsa/ocelot/felix.c
+++ b/drivers/net/dsa/ocelot/felix.c
@@ -112,6 +112,30 @@ static void felix_bridge_leave(struct dsa_switch *ds, int port,
 	ocelot_port_bridge_leave(ocelot, port, br);
 }
 
+static int felix_lag_join(struct dsa_switch *ds, int port,
+			  struct net_device *lag_dev)
+{
+	struct ocelot *ocelot = ds->priv;
+
+	return ocelot_port_lag_join(ocelot, port, lag_dev);
+}
+
+static void felix_lag_leave(struct dsa_switch *ds, int port,
+			    struct net_device *lag_dev)
+{
+	struct ocelot *ocelot = ds->priv;
+
+	ocelot_port_lag_leave(ocelot, port, lag_dev);
+}
+
+static int felix_lag_change(struct dsa_switch *ds, int port,
+			    struct netdev_lag_lower_state_info *linfo)
+{
+	struct ocelot *ocelot = ds->priv;
+
+	return ocelot_port_lag_change(ocelot, port, linfo);
+}
+
 static int felix_vlan_prepare(struct dsa_switch *ds, int port,
 			      const struct switchdev_obj_port_vlan *vlan)
 {
@@ -803,6 +827,9 @@ const struct dsa_switch_ops felix_switch_ops = {
 	.port_mdb_del		= felix_mdb_del,
 	.port_bridge_join	= felix_bridge_join,
 	.port_bridge_leave	= felix_bridge_leave,
+	.port_lag_join		= felix_lag_join,
+	.port_lag_leave		= felix_lag_leave,
+	.port_lag_change	= felix_lag_change,
 	.port_stp_state_set	= felix_bridge_stp_state_set,
 	.port_vlan_prepare	= felix_vlan_prepare,
 	.port_vlan_filtering	= felix_vlan_filtering,
diff --git a/drivers/net/ethernet/mscc/ocelot.c b/drivers/net/ethernet/mscc/ocelot.c
index 5c71d121048d..cd7a2e558301 100644
--- a/drivers/net/ethernet/mscc/ocelot.c
+++ b/drivers/net/ethernet/mscc/ocelot.c
@@ -1381,6 +1381,7 @@ int ocelot_port_lag_change(struct ocelot *ocelot, int port,
 	/* Rebalance the LAGs */
 	return ocelot_set_aggr_pgids(ocelot);
 }
+EXPORT_SYMBOL(ocelot_port_lag_change);
 
 /* Configure the maximum SDU (L2 payload) on RX to the value specified in @sdu.
  * The length of VLAN tags is accounted for automatically via DEV_MAC_TAGS_CFG.
diff --git a/drivers/net/ethernet/mscc/ocelot.h b/drivers/net/ethernet/mscc/ocelot.h
index 0860125b623c..3141ccde6a66 100644
--- a/drivers/net/ethernet/mscc/ocelot.h
+++ b/drivers/net/ethernet/mscc/ocelot.h
@@ -112,12 +112,6 @@ int ocelot_mact_learn(struct ocelot *ocelot, int port,
 		      unsigned int vid, enum macaccess_entry_type type);
 int ocelot_mact_forget(struct ocelot *ocelot,
 		       const unsigned char mac[ETH_ALEN], unsigned int vid);
-int ocelot_port_lag_join(struct ocelot *ocelot, int port,
-			 struct net_device *bond);
-int ocelot_port_lag_leave(struct ocelot *ocelot, int port,
-			  struct net_device *bond);
-int ocelot_port_lag_change(struct ocelot *ocelot, int port,
-			   struct netdev_lag_lower_state_info *info);
 struct net_device *ocelot_port_to_netdev(struct ocelot *ocelot, int port);
 int ocelot_netdev_to_port(struct net_device *dev);
 
diff --git a/include/soc/mscc/ocelot.h b/include/soc/mscc/ocelot.h
index 8a44b9064789..7c104f08796d 100644
--- a/include/soc/mscc/ocelot.h
+++ b/include/soc/mscc/ocelot.h
@@ -780,5 +780,11 @@ int ocelot_port_mdb_add(struct ocelot *ocelot, int port,
 			const struct switchdev_obj_port_mdb *mdb);
 int ocelot_port_mdb_del(struct ocelot *ocelot, int port,
 			const struct switchdev_obj_port_mdb *mdb);
+int ocelot_port_lag_join(struct ocelot *ocelot, int port,
+			 struct net_device *bond);
+int ocelot_port_lag_leave(struct ocelot *ocelot, int port,
+			  struct net_device *bond);
+int ocelot_port_lag_change(struct ocelot *ocelot, int port,
+			   struct netdev_lag_lower_state_info *info);
 
 #endif
-- 
2.25.1