net: dsa: add MRP support

Add support for offloading MRP in HW. Currently implement the switchdev
calls 'SWITCHDEV_OBJ_ID_MRP', 'SWITCHDEV_OBJ_ID_RING_ROLE_MRP',
to allow to create MRP instances and to set the role of these instances.

Add DSA_NOTIFIER_MRP_ADD/DEL and DSA_NOTIFIER_MRP_ADD/DEL_RING_ROLE
which calls to .port_mrp_add/del and .port_mrp_add/del_ring_role in the
DSA driver for the switch.

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

1 files changed, 105 insertions, 0 deletions

diff --git a/net/dsa/switch.c b/net/dsa/switch.c
index db2a9b221988..4b5da89dc27a 100644
--- a/net/dsa/switch.c
+++ b/net/dsa/switch.c
@@ -372,6 +372,99 @@ static int dsa_switch_change_tag_proto(struct dsa_switch *ds,
 	return 0;
 }
 
+static bool dsa_switch_mrp_match(struct dsa_switch *ds, int port,
+				 struct dsa_notifier_mrp_info *info)
+{
+	if (ds->index == info->sw_index && port == info->port)
+		return true;
+
+	if (dsa_is_dsa_port(ds, port))
+		return true;
+
+	return false;
+}
+
+static int dsa_switch_mrp_add(struct dsa_switch *ds,
+			      struct dsa_notifier_mrp_info *info)
+{
+	int err = 0;
+	int port;
+
+	if (!ds->ops->port_mrp_add)
+		return -EOPNOTSUPP;
+
+	for (port = 0; port < ds->num_ports; port++) {
+		if (dsa_switch_mrp_match(ds, port, info)) {
+			err = ds->ops->port_mrp_add(ds, port, info->mrp);
+			if (err)
+				break;
+		}
+	}
+
+	return err;
+}
+
+static int dsa_switch_mrp_del(struct dsa_switch *ds,
+			      struct dsa_notifier_mrp_info *info)
+{
+	if (!ds->ops->port_mrp_del)
+		return -EOPNOTSUPP;
+
+	if (ds->index == info->sw_index)
+		return ds->ops->port_mrp_del(ds, info->port, info->mrp);
+
+	return 0;
+}
+
+static bool
+dsa_switch_mrp_ring_role_match(struct dsa_switch *ds, int port,
+			       struct dsa_notifier_mrp_ring_role_info *info)
+{
+	if (ds->index == info->sw_index && port == info->port)
+		return true;
+
+	if (dsa_is_dsa_port(ds, port))
+		return true;
+
+	return false;
+}
+
+static int
+dsa_switch_mrp_add_ring_role(struct dsa_switch *ds,
+			     struct dsa_notifier_mrp_ring_role_info *info)
+{
+	int err = 0;
+	int port;
+
+	if (!ds->ops->port_mrp_add)
+		return -EOPNOTSUPP;
+
+	for (port = 0; port < ds->num_ports; port++) {
+		if (dsa_switch_mrp_ring_role_match(ds, port, info)) {
+			err = ds->ops->port_mrp_add_ring_role(ds, port,
+							      info->mrp);
+			if (err)
+				break;
+		}
+	}
+
+	return err;
+}
+
+static int
+dsa_switch_mrp_del_ring_role(struct dsa_switch *ds,
+			     struct dsa_notifier_mrp_ring_role_info *info)
+{
+	if (!ds->ops->port_mrp_del)
+		return -EOPNOTSUPP;
+
+	if (ds->index == info->sw_index)
+		return ds->ops->port_mrp_del_ring_role(ds, info->port,
+						       info->mrp);
+
+	return 0;
+}
+
 static int dsa_switch_event(struct notifier_block *nb,
 			    unsigned long event, void *info)
 {
@@ -427,6 +520,18 @@ static int dsa_switch_event(struct notifier_block *nb,
 	case DSA_NOTIFIER_TAG_PROTO:
 		err = dsa_switch_change_tag_proto(ds, info);
 		break;
+	case DSA_NOTIFIER_MRP_ADD:
+		err = dsa_switch_mrp_add(ds, info);
+		break;
+	case DSA_NOTIFIER_MRP_DEL:
+		err = dsa_switch_mrp_del(ds, info);
+		break;
+	case DSA_NOTIFIER_MRP_ADD_RING_ROLE:
+		err = dsa_switch_mrp_add_ring_role(ds, info);
+		break;
+	case DSA_NOTIFIER_MRP_DEL_RING_ROLE:
+		err = dsa_switch_mrp_del_ring_role(ds, info);
+		break;
 	default:
 		err = -EOPNOTSUPP;
 		break;