spectrum: Add a delayed work to update SPAN buffsize according to speed

When PUDE event is handled and the link is up, update the port SPAN
buffer size according to the current speed.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlxsw/spectrum.c

@@ -3908,6 +3908,8 @@ static int mlxsw_sp_port_create(struct mlxsw_sp *mlxsw_sp, u8 local_port,
 
 	INIT_DELAYED_WORK(&mlxsw_sp_port->ptp.shaper_dw,
 			  mlxsw_sp->ptp_ops->shaper_work);
+	INIT_DELAYED_WORK(&mlxsw_sp_port->span.speed_update_dw,
+			  mlxsw_sp_span_speed_update_work);
 
 	mlxsw_sp->ports[local_port] = mlxsw_sp_port;
 	err = register_netdev(dev);
@@ -3964,6 +3966,7 @@ static void mlxsw_sp_port_remove(struct mlxsw_sp *mlxsw_sp, u8 local_port)
 	struct mlxsw_sp_port *mlxsw_sp_port = mlxsw_sp->ports[local_port];
 
 	cancel_delayed_work_sync(&mlxsw_sp_port->periodic_hw_stats.update_dw);
+	cancel_delayed_work_sync(&mlxsw_sp_port->span.speed_update_dw);
 	cancel_delayed_work_sync(&mlxsw_sp_port->ptp.shaper_dw);
 	mlxsw_sp_port_ptp_clear(mlxsw_sp_port);
 	mlxsw_core_port_clear(mlxsw_sp->core, local_port, mlxsw_sp);
@@ -4371,6 +4374,7 @@ static void mlxsw_sp_pude_event_func(const struct mlxsw_reg_info *reg,
 		netdev_info(mlxsw_sp_port->dev, "link up\n");
 		netif_carrier_on(mlxsw_sp_port->dev);
 		mlxsw_core_schedule_dw(&mlxsw_sp_port->ptp.shaper_dw, 0);
+		mlxsw_core_schedule_dw(&mlxsw_sp_port->span.speed_update_dw, 0);
 	} else {
 		netdev_info(mlxsw_sp_port->dev, "link down\n");
 		netif_carrier_off(mlxsw_sp_port->dev);

drivers/net/ethernet/mellanox/mlxsw/spectrum.h

@@ -294,6 +294,9 @@ struct mlxsw_sp_port {
 		struct mlxsw_sp_ptp_port_stats stats;
 	} ptp;
 	u8 split_base_local_port;
+	struct {
+		struct delayed_work speed_update_dw;
+	} span;
 };
 
 struct mlxsw_sp_port_type_speed_ops {

drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c

@@ -778,6 +778,22 @@ int mlxsw_sp_span_port_mtu_update(struct mlxsw_sp_port *port, u16 mtu)
 	return 0;
 }
 
+void mlxsw_sp_span_speed_update_work(struct work_struct *work)
+{
+	struct delayed_work *dwork = to_delayed_work(work);
+	struct mlxsw_sp_port *mlxsw_sp_port;
+
+	mlxsw_sp_port = container_of(dwork, struct mlxsw_sp_port,
+				     span.speed_update_dw);
+
+	/* If port is egress mirrored, the shared buffer size should be
+	 * updated according to the speed value.
+	 */
+	if (mlxsw_sp_span_is_egress_mirror(mlxsw_sp_port))
+		mlxsw_sp_span_port_buffsize_update(mlxsw_sp_port,
+						   mlxsw_sp_port->dev->mtu);
+}
+
 static struct mlxsw_sp_span_inspected_port *
 mlxsw_sp_span_entry_bound_port_find(struct mlxsw_sp_span_entry *span_entry,
 				    enum mlxsw_sp_span_type type,

drivers/net/ethernet/mellanox/mlxsw/spectrum_span.h

@@ -74,5 +74,6 @@ void mlxsw_sp_span_entry_invalidate(struct mlxsw_sp *mlxsw_sp,
 				    struct mlxsw_sp_span_entry *span_entry);
 
 int mlxsw_sp_span_port_mtu_update(struct mlxsw_sp_port *port, u16 mtu);
+void mlxsw_sp_span_speed_update_work(struct work_struct *work);
 
 #endif