net: mscc: ocelot: Add support for MRP

Add basic support for MRP. The HW will just trap all MRP frames on the
ring ports to CPU and allow the SW to process them. In this way it is
possible to for this node to behave both as MRM and MRC.

Current limitations are:
- it doesn't support Interconnect roles.
- it supports only a single ring.
- the HW should be able to do forwarding of MRP Test frames so the SW
  will not need to do this. So it would be able to have the role MRC
  without SW support.

Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 60 insertions, 0 deletions

diff --git a/drivers/net/ethernet/mscc/ocelot_net.c b/drivers/net/ethernet/mscc/ocelot_net.c
index 6518262532f0..12cb6867a2d0 100644
--- a/drivers/net/ethernet/mscc/ocelot_net.c
+++ b/drivers/net/ethernet/mscc/ocelot_net.c
@@ -1010,6 +1010,52 @@ static int ocelot_port_obj_del_mdb(struct net_device *dev,
 	return ocelot_port_mdb_del(ocelot, port, mdb);
 }
 
+static int ocelot_port_obj_mrp_add(struct net_device *dev,
+				   const struct switchdev_obj_mrp *mrp)
+{
+	struct ocelot_port_private *priv = netdev_priv(dev);
+	struct ocelot_port *ocelot_port = &priv->port;
+	struct ocelot *ocelot = ocelot_port->ocelot;
+	int port = priv->chip_port;
+
+	return ocelot_mrp_add(ocelot, port, mrp);
+}
+
+static int ocelot_port_obj_mrp_del(struct net_device *dev,
+				   const struct switchdev_obj_mrp *mrp)
+{
+	struct ocelot_port_private *priv = netdev_priv(dev);
+	struct ocelot_port *ocelot_port = &priv->port;
+	struct ocelot *ocelot = ocelot_port->ocelot;
+	int port = priv->chip_port;
+
+	return ocelot_mrp_del(ocelot, port, mrp);
+}
+
+static int
+ocelot_port_obj_mrp_add_ring_role(struct net_device *dev,
+				  const struct switchdev_obj_ring_role_mrp *mrp)
+{
+	struct ocelot_port_private *priv = netdev_priv(dev);
+	struct ocelot_port *ocelot_port = &priv->port;
+	struct ocelot *ocelot = ocelot_port->ocelot;
+	int port = priv->chip_port;
+
+	return ocelot_mrp_add_ring_role(ocelot, port, mrp);
+}
+
+static int
+ocelot_port_obj_mrp_del_ring_role(struct net_device *dev,
+				  const struct switchdev_obj_ring_role_mrp *mrp)
+{
+	struct ocelot_port_private *priv = netdev_priv(dev);
+	struct ocelot_port *ocelot_port = &priv->port;
+	struct ocelot *ocelot = ocelot_port->ocelot;
+	int port = priv->chip_port;
+
+	return ocelot_mrp_del_ring_role(ocelot, port, mrp);
+}
+
 static int ocelot_port_obj_add(struct net_device *dev,
 			       const struct switchdev_obj *obj,
 			       struct netlink_ext_ack *extack)
@@ -1024,6 +1070,13 @@ static int ocelot_port_obj_add(struct net_device *dev,
 	case SWITCHDEV_OBJ_ID_PORT_MDB:
 		ret = ocelot_port_obj_add_mdb(dev, SWITCHDEV_OBJ_PORT_MDB(obj));
 		break;
+	case SWITCHDEV_OBJ_ID_MRP:
+		ret = ocelot_port_obj_mrp_add(dev, SWITCHDEV_OBJ_MRP(obj));
+		break;
+	case SWITCHDEV_OBJ_ID_RING_ROLE_MRP:
+		ret = ocelot_port_obj_mrp_add_ring_role(dev,
+							SWITCHDEV_OBJ_RING_ROLE_MRP(obj));
+		break;
 	default:
 		return -EOPNOTSUPP;
 	}
@@ -1044,6 +1097,13 @@ static int ocelot_port_obj_del(struct net_device *dev,
 	case SWITCHDEV_OBJ_ID_PORT_MDB:
 		ret = ocelot_port_obj_del_mdb(dev, SWITCHDEV_OBJ_PORT_MDB(obj));
 		break;
+	case SWITCHDEV_OBJ_ID_MRP:
+		ret = ocelot_port_obj_mrp_del(dev, SWITCHDEV_OBJ_MRP(obj));
+		break;
+	case SWITCHDEV_OBJ_ID_RING_ROLE_MRP:
+		ret = ocelot_port_obj_mrp_del_ring_role(dev,
+							SWITCHDEV_OBJ_RING_ROLE_MRP(obj));
+		break;
 	default:
 		return -EOPNOTSUPP;
 	}