[patch net-next v2 5/5] mlxsw: spectrum_flower: Add support for tcp flags

[Jiri Pirko]

From: Jiri Pirko <j...@mellanox.com>

Allow to offload rules that contain tcp flags within the mask.

Signed-off-by: Jiri Pirko <j...@mellanox.com>
Reviewed-by: Ido Schimmel <ido...@mellanox.com>
---
 .../ethernet/mellanox/mlxsw/spectrum_acl_tcam.c    |  1 +
 .../net/ethernet/mellanox/mlxsw/spectrum_flower.c  | 29 ++++++++++++++++++++++
 2 files changed, 30 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_tcam.c 
b/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_tcam.c
index 3a24289..61a10f1 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_tcam.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_tcam.c
@@ -983,6 +983,7 @@ static const enum mlxsw_afk_element 
mlxsw_sp_acl_tcam_pattern_ipv4[] = {
        MLXSW_AFK_ELEMENT_SRC_L4_PORT,
        MLXSW_AFK_ELEMENT_VID,
        MLXSW_AFK_ELEMENT_PCP,
+       MLXSW_AFK_ELEMENT_TCP_FLAGS,
 };
 
 static const enum mlxsw_afk_element mlxsw_sp_acl_tcam_pattern_ipv6[] = {
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_flower.c 
b/drivers/net/ethernet/mellanox/mlxsw/spectrum_flower.c
index f7a8c3c..ed75c6a 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_flower.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_flower.c
@@ -182,6 +182,32 @@ static int mlxsw_sp_flower_parse_ports(struct mlxsw_sp 
*mlxsw_sp,
        return 0;
 }
 
+static int mlxsw_sp_flower_parse_tcp(struct mlxsw_sp *mlxsw_sp,
+                                    struct mlxsw_sp_acl_rule_info *rulei,
+                                    struct tc_cls_flower_offload *f,
+                                    u8 ip_proto)
+{
+       struct flow_dissector_key_tcp *key, *mask;
+
+       if (!dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_TCP))
+               return 0;
+
+       if (ip_proto != IPPROTO_TCP) {
+               dev_err(mlxsw_sp->bus_info->dev, "TCP keys supported only for 
TCP\n");
+               return -EINVAL;
+       }
+
+       key = skb_flow_dissector_target(f->dissector,
+                                       FLOW_DISSECTOR_KEY_TCP,
+                                       f->key);
+       mask = skb_flow_dissector_target(f->dissector,
+                                        FLOW_DISSECTOR_KEY_TCP,
+                                        f->mask);
+       mlxsw_sp_acl_rulei_keymask_u32(rulei, MLXSW_AFK_ELEMENT_TCP_FLAGS,
+                                      ntohs(key->flags), ntohs(mask->flags));
+       return 0;
+}
+
 static int mlxsw_sp_flower_parse(struct mlxsw_sp *mlxsw_sp,
                                 struct net_device *dev,
                                 struct mlxsw_sp_acl_rule_info *rulei,
@@ -290,6 +316,9 @@ static int mlxsw_sp_flower_parse(struct mlxsw_sp *mlxsw_sp,
        err = mlxsw_sp_flower_parse_ports(mlxsw_sp, rulei, f, ip_proto);
        if (err)
                return err;
+       err = mlxsw_sp_flower_parse_tcp(mlxsw_sp, rulei, f, ip_proto);
+       if (err)
+               return err;
 
        return mlxsw_sp_flower_parse_actions(mlxsw_sp, dev, rulei, f->exts);
 }
-- 
2.9.3