mlxsw: spectrum_span: Allow passing parameters to SPAN agents

Currently, the only parameter of a SPAN agent is the netdev which
the SPAN agent should mirror to.

The next patch will add the ability to request a SPAN agent that mirrors
to a specific netdev and has a specific policer ID bound to it. This is
required when mirroring packets to the CPU port.

Therefore, encapsulate the sole parameter to mlxsw_sp_span_agent_get()
in a structure, so that it could later be extended with policer
information.

Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Petr Machata <petrm@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_acl_flex_actions.c

@@ -136,11 +136,13 @@ mlxsw_sp_act_mirror_add(void *priv, u8 local_in_port,
 			const struct net_device *out_dev,
 			bool ingress, int *p_span_id)
 {
+	struct mlxsw_sp_span_agent_parms agent_parms;
 	struct mlxsw_sp_port *mlxsw_sp_port;
 	struct mlxsw_sp *mlxsw_sp = priv;
 	int err;
 
-	err = mlxsw_sp_span_agent_get(mlxsw_sp, out_dev, p_span_id);
+	agent_parms.to_dev = out_dev;
+	err = mlxsw_sp_span_agent_get(mlxsw_sp, p_span_id, &agent_parms);
 	if (err)
 		return err;
 

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

@@ -27,6 +27,7 @@ mlxsw_sp_mall_port_mirror_add(struct mlxsw_sp_port *mlxsw_sp_port,
 			      struct mlxsw_sp_mall_entry *mall_entry)
 {
 	struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
+	struct mlxsw_sp_span_agent_parms agent_parms;
 	struct mlxsw_sp_span_trigger_parms parms;
 	enum mlxsw_sp_span_trigger trigger;
 	int err;
@@ -36,8 +37,9 @@ mlxsw_sp_mall_port_mirror_add(struct mlxsw_sp_port *mlxsw_sp_port,
 		return -EINVAL;
 	}
 
-	err = mlxsw_sp_span_agent_get(mlxsw_sp, mall_entry->mirror.to_dev,
-				      &mall_entry->mirror.span_id);
+	agent_parms.to_dev = mall_entry->mirror.to_dev;
+	err = mlxsw_sp_span_agent_get(mlxsw_sp, &mall_entry->mirror.span_id,
+				      &agent_parms);
 	if (err)
 		return err;
 

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

@@ -1295,10 +1295,13 @@ static int mlxsw_sp_qevent_mirror_configure(struct mlxsw_sp *mlxsw_sp,
 {
 	struct mlxsw_sp_port *mlxsw_sp_port = qevent_binding->mlxsw_sp_port;
 	struct mlxsw_sp_span_trigger_parms trigger_parms = {};
+	struct mlxsw_sp_span_agent_parms agent_parms = {
+		.to_dev = mall_entry->mirror.to_dev,
+	};
 	int span_id;
 	int err;
 
-	err = mlxsw_sp_span_agent_get(mlxsw_sp, mall_entry->mirror.to_dev, &span_id);
+	err = mlxsw_sp_span_agent_get(mlxsw_sp, &span_id, &agent_parms);
 	if (err)
 		return err;
 

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

@@ -1032,9 +1032,10 @@ void mlxsw_sp_span_respin(struct mlxsw_sp *mlxsw_sp)
 	mlxsw_core_schedule_work(&mlxsw_sp->span->work);
 }
 
-int mlxsw_sp_span_agent_get(struct mlxsw_sp *mlxsw_sp,
-			    const struct net_device *to_dev, int *p_span_id)
+int mlxsw_sp_span_agent_get(struct mlxsw_sp *mlxsw_sp, int *p_span_id,
+			    const struct mlxsw_sp_span_agent_parms *parms)
 {
+	const struct net_device *to_dev = parms->to_dev;
 	const struct mlxsw_sp_span_entry_ops *ops;
 	struct mlxsw_sp_span_entry *span_entry;
 	struct mlxsw_sp_span_parms sparms;

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

@@ -35,6 +35,10 @@ struct mlxsw_sp_span_trigger_parms {
 	int span_id;
 };
 
+struct mlxsw_sp_span_agent_parms {
+	const struct net_device *to_dev;
+};
+
 struct mlxsw_sp_span_entry_ops;
 
 struct mlxsw_sp_span_ops {
@@ -74,8 +78,8 @@ void mlxsw_sp_span_entry_invalidate(struct mlxsw_sp *mlxsw_sp,
 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);
 
-int mlxsw_sp_span_agent_get(struct mlxsw_sp *mlxsw_sp,
-			    const struct net_device *to_dev, int *p_span_id);
+int mlxsw_sp_span_agent_get(struct mlxsw_sp *mlxsw_sp, int *p_span_id,
+			    const struct mlxsw_sp_span_agent_parms *parms);
 void mlxsw_sp_span_agent_put(struct mlxsw_sp *mlxsw_sp, int span_id);
 int mlxsw_sp_span_analyzed_port_get(struct mlxsw_sp_port *mlxsw_sp_port,
 				    bool ingress);