net: marvell: prestera: implement br_port_locked flag offloading

Both <port> br_port_locked and <lag> interfaces's flag
offloading is supported. No new ABI is being added,
rather existing (port_param_set) API call gets extended.
Signed-off-by: Oleksandr Mazur <oleksandr.mazur@plvision.eu>

V2:
  add missing receipents (linux-kernel, netdev)
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/marvell/prestera/prestera.h

@@ -367,6 +367,8 @@ int prestera_port_learning_set(struct prestera_port *port, bool learn_enable);
 int prestera_port_uc_flood_set(struct prestera_port *port, bool flood);
 int prestera_port_mc_flood_set(struct prestera_port *port, bool flood);
 
+int prestera_port_br_locked_set(struct prestera_port *port, bool br_locked);
+
 int prestera_port_pvid_set(struct prestera_port *port, u16 vid);
 
 bool prestera_netdev_check(const struct net_device *dev);

drivers/net/ethernet/marvell/prestera/prestera_hw.c

@@ -101,6 +101,7 @@ enum {
 	PRESTERA_CMD_PORT_ATTR_LEARNING = 7,
 	PRESTERA_CMD_PORT_ATTR_FLOOD = 8,
 	PRESTERA_CMD_PORT_ATTR_CAPABILITY = 9,
+	PRESTERA_CMD_PORT_ATTR_LOCKED = 10,
 	PRESTERA_CMD_PORT_ATTR_PHY_MODE = 12,
 	PRESTERA_CMD_PORT_ATTR_TYPE = 13,
 	PRESTERA_CMD_PORT_ATTR_STATS = 17,
@@ -285,6 +286,7 @@ union prestera_msg_port_param {
 	u8 duplex;
 	u8 fec;
 	u8 fc;
+	u8 br_locked;
 	union {
 		struct {
 			u8 admin;
@@ -1640,6 +1642,22 @@ int prestera_hw_port_mc_flood_set(const struct prestera_port *port, bool flood)
 			    &req.cmd, sizeof(req));
 }
 
+int prestera_hw_port_br_locked_set(const struct prestera_port *port,
+				   bool br_locked)
+{
+	struct prestera_msg_port_attr_req req = {
+		.attr = __cpu_to_le32(PRESTERA_CMD_PORT_ATTR_LOCKED),
+		.port = __cpu_to_le32(port->hw_id),
+		.dev = __cpu_to_le32(port->dev_id),
+		.param = {
+			.br_locked = br_locked,
+		}
+	};
+
+	return prestera_cmd(port->sw, PRESTERA_CMD_TYPE_PORT_ATTR_SET,
+			    &req.cmd, sizeof(req));
+}
+
 int prestera_hw_vlan_create(struct prestera_switch *sw, u16 vid)
 {
 	struct prestera_msg_vlan_req req = {

drivers/net/ethernet/marvell/prestera/prestera_hw.h

@@ -183,6 +183,8 @@ int prestera_hw_port_speed_get(const struct prestera_port *port, u32 *speed);
 int prestera_hw_port_learning_set(struct prestera_port *port, bool enable);
 int prestera_hw_port_uc_flood_set(const struct prestera_port *port, bool flood);
 int prestera_hw_port_mc_flood_set(const struct prestera_port *port, bool flood);
+int prestera_hw_port_br_locked_set(const struct prestera_port *port,
+				   bool br_locked);
 int prestera_hw_port_accept_frm_type(struct prestera_port *port,
 				     enum prestera_accept_frm_type type);
 /* Vlan API */

drivers/net/ethernet/marvell/prestera/prestera_main.c

@@ -51,6 +51,11 @@ int prestera_port_mc_flood_set(struct prestera_port *port, bool flood)
 	return prestera_hw_port_mc_flood_set(port, flood);
 }
 
+int prestera_port_br_locked_set(struct prestera_port *port, bool br_locked)
+{
+	return prestera_hw_port_br_locked_set(port, br_locked);
+}
+
 int prestera_port_pvid_set(struct prestera_port *port, u16 vid)
 {
 	enum prestera_accept_frm_type frm_type;

drivers/net/ethernet/marvell/prestera/prestera_switchdev.c

@@ -143,6 +143,7 @@ prestera_br_port_flags_reset(struct prestera_bridge_port *br_port,
 	prestera_port_uc_flood_set(port, false);
 	prestera_port_mc_flood_set(port, false);
 	prestera_port_learning_set(port, false);
+	prestera_port_br_locked_set(port, false);
 }
 
 static int prestera_br_port_flags_set(struct prestera_bridge_port *br_port,
@@ -162,6 +163,11 @@ static int prestera_br_port_flags_set(struct prestera_bridge_port *br_port,
 	if (err)
 		goto err_out;
 
+	err = prestera_port_br_locked_set(port,
+					  br_port->flags & BR_PORT_LOCKED);
+	if (err)
+		goto err_out;
+
 	return 0;
 
 err_out:
@@ -1163,7 +1169,7 @@ static int prestera_port_obj_attr_set(struct net_device *dev, const void *ctx,
 		break;
 	case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
 		if (attr->u.brport_flags.mask &
-		    ~(BR_LEARNING | BR_FLOOD | BR_MCAST_FLOOD))
+		    ~(BR_LEARNING | BR_FLOOD | BR_MCAST_FLOOD | BR_PORT_LOCKED))
 			err = -EINVAL;
 		break;
 	case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS: