[PATCH net-next 2/4] mlxsw: spectrum_nve: Breakout common code to a common function

[Ido Schimmel]

The configuration of a VXLAN tunnel in Spectrum-1 and Spectrum-2 is
largely the same. To avoid code duplication, breakout the common parts
to a common function that can be invoked from the ASIC-specific code.

Signed-off-by: Ido Schimmel <ido...@mellanox.com>
Reviewed-by: Petr Machata <pe...@mellanox.com>
---
 .../mellanox/mlxsw/spectrum_nve_vxlan.c       | 30 ++++++++++++-------
 1 file changed, 19 insertions(+), 11 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_nve_vxlan.c 
b/drivers/net/ethernet/mellanox/mlxsw/spectrum_nve_vxlan.c
index 9ba0b83bd949..60f88e5642e1 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_nve_vxlan.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_nve_vxlan.c
@@ -112,13 +112,30 @@ static int mlxsw_sp_nve_parsing_set(struct mlxsw_sp 
*mlxsw_sp,
        return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(mprs), mprs_pl);
 }
 
+static void
+mlxsw_sp_nve_vxlan_config_prepare(char *tngcr_pl,
+                                 const struct mlxsw_sp_nve_config *config)
+{
+       u8 udp_sport;
+
+       mlxsw_reg_tngcr_pack(tngcr_pl, MLXSW_REG_TNGCR_TYPE_VXLAN, true,
+                            config->ttl);
+       /* VxLAN driver's default UDP source port range is 32768 (0x8000)
+        * to 60999 (0xee47). Set the upper 8 bits of the UDP source port
+        * to a random number between 0x80 and 0xee
+        */
+       get_random_bytes(&udp_sport, sizeof(udp_sport));
+       udp_sport = (udp_sport % (0xee - 0x80 + 1)) + 0x80;
+       mlxsw_reg_tngcr_nve_udp_sport_prefix_set(tngcr_pl, udp_sport);
+       mlxsw_reg_tngcr_usipv4_set(tngcr_pl, be32_to_cpu(config->ul_sip.addr4));
+}
+
 static int
 mlxsw_sp1_nve_vxlan_config_set(struct mlxsw_sp *mlxsw_sp,
                               const struct mlxsw_sp_nve_config *config)
 {
        char tngcr_pl[MLXSW_REG_TNGCR_LEN];
        u16 ul_vr_id;
-       u8 udp_sport;
        int err;
 
        err = mlxsw_sp_router_tb_id_vr_id(mlxsw_sp, config->ul_tb_id,
@@ -126,18 +143,9 @@ mlxsw_sp1_nve_vxlan_config_set(struct mlxsw_sp *mlxsw_sp,
        if (err)
                return err;
 
-       mlxsw_reg_tngcr_pack(tngcr_pl, MLXSW_REG_TNGCR_TYPE_VXLAN, true,
-                            config->ttl);
-       /* VxLAN driver's default UDP source port range is 32768 (0x8000)
-        * to 60999 (0xee47). Set the upper 8 bits of the UDP source port
-        * to a random number between 0x80 and 0xee
-        */
-       get_random_bytes(&udp_sport, sizeof(udp_sport));
-       udp_sport = (udp_sport % (0xee - 0x80 + 1)) + 0x80;
-       mlxsw_reg_tngcr_nve_udp_sport_prefix_set(tngcr_pl, udp_sport);
+       mlxsw_sp_nve_vxlan_config_prepare(tngcr_pl, config);
        mlxsw_reg_tngcr_learn_enable_set(tngcr_pl, config->learning_en);
        mlxsw_reg_tngcr_underlay_virtual_router_set(tngcr_pl, ul_vr_id);
-       mlxsw_reg_tngcr_usipv4_set(tngcr_pl, be32_to_cpu(config->ul_sip.addr4));
 
        return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(tngcr), tngcr_pl);
 }
-- 
2.20.1