mlxsw: spectrum_span: Move SPAN operations out of global file

The per-ASIC SPAN operations are relevant to the SPAN module and
therefore should be implemented there and not in the main driver file.
Move them.

These operations will be extended later on.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 47 insertions, 0 deletions

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
index 92351a79addc..49e2a417ec0e 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
@@ -766,6 +766,14 @@ static int mlxsw_sp_span_entry_put(struct mlxsw_sp *mlxsw_sp,
 	return 0;
 }
 
+static u32 mlxsw_sp_span_buffsize_get(struct mlxsw_sp *mlxsw_sp, int mtu,
+				      u32 speed)
+{
+	u32 buffsize = mlxsw_sp->span_ops->buffsize_get(speed, mtu);
+
+	return mlxsw_sp_bytes_cells(mlxsw_sp, buffsize) + 1;
+}
+
 static int
 mlxsw_sp_span_port_buffer_update(struct mlxsw_sp_port *mlxsw_sp_port, u16 mtu)
 {
@@ -1207,3 +1215,42 @@ void mlxsw_sp_span_agent_unbind(struct mlxsw_sp *mlxsw_sp,
 
 	mlxsw_sp_span_trigger_entry_destroy(mlxsw_sp->span, trigger_entry);
 }
+
+static u32 mlxsw_sp1_span_buffsize_get(int mtu, u32 speed)
+{
+	return mtu * 5 / 2;
+}
+
+const struct mlxsw_sp_span_ops mlxsw_sp1_span_ops = {
+	.buffsize_get = mlxsw_sp1_span_buffsize_get,
+};
+
+#define MLXSW_SP2_SPAN_EG_MIRROR_BUFFER_FACTOR 38
+#define MLXSW_SP3_SPAN_EG_MIRROR_BUFFER_FACTOR 50
+
+static u32 __mlxsw_sp_span_buffsize_get(int mtu, u32 speed, u32 buffer_factor)
+{
+	return 3 * mtu + buffer_factor * speed / 1000;
+}
+
+static u32 mlxsw_sp2_span_buffsize_get(int mtu, u32 speed)
+{
+	int factor = MLXSW_SP2_SPAN_EG_MIRROR_BUFFER_FACTOR;
+
+	return __mlxsw_sp_span_buffsize_get(mtu, speed, factor);
+}
+
+const struct mlxsw_sp_span_ops mlxsw_sp2_span_ops = {
+	.buffsize_get = mlxsw_sp2_span_buffsize_get,
+};
+
+static u32 mlxsw_sp3_span_buffsize_get(int mtu, u32 speed)
+{
+	int factor = MLXSW_SP3_SPAN_EG_MIRROR_BUFFER_FACTOR;
+
+	return __mlxsw_sp_span_buffsize_get(mtu, speed, factor);
+}
+
+const struct mlxsw_sp_span_ops mlxsw_sp3_span_ops = {
+	.buffsize_get = mlxsw_sp3_span_buffsize_get,
+};