[PATCH net-next V2 4/4] net/mlx5e: Offload TC matching on ip tos / traffic-class

[Or Gerlitz]

Enable offloading of TC matching on ipv4 tos or ipv6 traffic-class.

Signed-off-by: Or Gerlitz <ogerl...@mellanox.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_tc.c | 26 ++++++++++++++++++++++++-
 1 file changed, 25 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c 
b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
index 066045b..8ec13f9 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
@@ -582,7 +582,8 @@ static int __parse_cls_flower(struct mlx5e_priv *priv,
              BIT(FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS) |
              BIT(FLOW_DISSECTOR_KEY_ENC_PORTS) |
              BIT(FLOW_DISSECTOR_KEY_ENC_CONTROL) |
-             BIT(FLOW_DISSECTOR_KEY_TCP))) {
+             BIT(FLOW_DISSECTOR_KEY_TCP) |
+             BIT(FLOW_DISSECTOR_KEY_IP))) {
                netdev_warn(priv->netdev, "Unsupported key used: 0x%x\n",
                            f->dissector->used_keys);
                return -EOPNOTSUPP;
@@ -809,6 +810,29 @@ static int __parse_cls_flower(struct mlx5e_priv *priv,
                        *min_inline = MLX5_INLINE_MODE_TCP_UDP;
        }
 
+       if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_IP)) {
+               struct flow_dissector_key_ip *key =
+                       skb_flow_dissector_target(f->dissector,
+                                                 FLOW_DISSECTOR_KEY_IP,
+                                                 f->key);
+               struct flow_dissector_key_ip *mask =
+                       skb_flow_dissector_target(f->dissector,
+                                                 FLOW_DISSECTOR_KEY_IP,
+                                                 f->mask);
+
+               MLX5_SET(fte_match_set_lyr_2_4, headers_c, ip_ecn, mask->tos & 
0x3);
+               MLX5_SET(fte_match_set_lyr_2_4, headers_v, ip_ecn, key->tos & 
0x3);
+
+               MLX5_SET(fte_match_set_lyr_2_4, headers_c, ip_dscp, mask->tos 
>> 2);
+               MLX5_SET(fte_match_set_lyr_2_4, headers_v, ip_dscp, key->tos  
>> 2);
+
+               if (mask->tos)
+                       *min_inline = MLX5_INLINE_MODE_IP;
+
+               if (mask->ttl) /* currently not supported */
+                       return -EOPNOTSUPP;
+       }
+
        if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_TCP)) {
                struct flow_dissector_key_tcp *key =
                        skb_flow_dissector_target(f->dissector,
-- 
2.3.7