[net-next 05/15] net/mlx5e: Offload TC matching on ip ttl

[Saeed Mahameed]

From: Or Gerlitz <ogerl...@mellanox.com>

Enable offloading of TC matching on ip ttl / hop-limit

As matching on ttl is supported only by newer HW brands (ConnectX-5),
we should do capability check before attempting to offload that.

Signed-off-by: Or Gerlitz <ogerl...@mellanox.com>
Reviewed-by: Paul Blakey <pa...@mellanox.com>
Signed-off-by: Saeed Mahameed <sae...@mellanox.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_tc.c | 11 ++++++++---
 include/linux/mlx5/mlx5_ifc.h                   |  5 +++--
 2 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c 
b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
index 633a91a71218..382dede903a3 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
@@ -904,11 +904,16 @@ static int __parse_cls_flower(struct mlx5e_priv *priv,
                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;
+               MLX5_SET(fte_match_set_lyr_2_4, headers_c, ttl_hoplimit, 
mask->ttl);
+               MLX5_SET(fte_match_set_lyr_2_4, headers_v, ttl_hoplimit, 
key->ttl);
 
-               if (mask->ttl) /* currently not supported */
+               if (mask->ttl &&
+                   !MLX5_CAP_ESW_FLOWTABLE_FDB(priv->mdev,
+                                               
ft_field_support.outer_ipv4_ttl))
                        return -EOPNOTSUPP;
+
+               if (mask->tos || mask->ttl)
+                       *min_inline = MLX5_INLINE_MODE_IP;
        }
 
        if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_PORTS)) {
diff --git a/include/linux/mlx5/mlx5_ifc.h b/include/linux/mlx5/mlx5_ifc.h
index e86ef880a149..694f51d388d9 100644
--- a/include/linux/mlx5/mlx5_ifc.h
+++ b/include/linux/mlx5/mlx5_ifc.h
@@ -243,7 +243,7 @@ struct mlx5_ifc_flow_table_fields_supported_bits {
        u8         outer_first_prio[0x1];
        u8         outer_first_cfi[0x1];
        u8         outer_first_vid[0x1];
-       u8         reserved_at_7[0x1];
+       u8         outer_ipv4_ttl[0x1];
        u8         outer_second_prio[0x1];
        u8         outer_second_cfi[0x1];
        u8         outer_second_vid[0x1];
@@ -380,7 +380,8 @@ struct mlx5_ifc_fte_match_set_lyr_2_4_bits {
        u8         tcp_sport[0x10];
        u8         tcp_dport[0x10];
 
-       u8         reserved_at_c0[0x20];
+       u8         reserved_at_c0[0x18];
+       u8         ttl_hoplimit[0x8];
 
        u8         udp_sport[0x10];
        u8         udp_dport[0x10];
-- 
2.11.0