Subject: [net 11/12] net/mlx5e: Set geneve_tlv_option_0_exist when matching on geneve option

From: Saeed Mahameed <[email-masked]>
Date: Wed, 28 Dec 2022 11:43:30 -0800

From: Maor Dickman <[email-masked]>

The cited patch added support of matching on geneve option by setting
geneve_tlv_option_0_data mask and key but didn't set geneve_tlv_option_0_exist
bit which is required on some HWs when matching geneve_tlv_option_0_data parameter,
this may cause in some cases for packets to wrongly match on rules with different
geneve option.

Example of such case is packet with geneve_tlv_object class=789 and data=456
will wrongly match on rule with match geneve_tlv_object class=123 and data=456.

Fix it by setting geneve_tlv_option_0_exist bit when supported by the HW when matching
on geneve_tlv_option_0_data parameter.

Fixes: 9272e3df3023 ("net/mlx5e: Geneve, Add support for encap/decap flows offload")
Signed-off-by: Maor Dickman <[email-masked]>
Reviewed-by: Roi Dayan <[email-masked]>
Signed-off-by: Saeed Mahameed <[email-masked]>
---
 drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_geneve.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_geneve.c b/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_geneve.c
index f5b26f5a7de4..054d80c4e65c 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_geneve.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_geneve.c
@@ -273,6 +273,11 @@ static int mlx5e_tc_tun_parse_geneve_options(struct mlx5e_priv *priv,
 		 geneve_tlv_option_0_data, be32_to_cpu(opt_data_key));
 	MLX5_SET(fte_match_set_misc3, misc_3_c,
 		 geneve_tlv_option_0_data, be32_to_cpu(opt_data_mask));
+	if (MLX5_CAP_ESW_FLOWTABLE_FDB(priv->mdev,
+				       ft_field_support.geneve_tlv_option_0_exist)) {
+		MLX5_SET_TO_ONES(fte_match_set_misc, misc_c, geneve_tlv_option_0_exist);
+		MLX5_SET_TO_ONES(fte_match_set_misc, misc_v, geneve_tlv_option_0_exist);
+	}
 
 	spec->match_criteria_enable |= MLX5_MATCH_MISC_PARAMETERS_3;
 
-- 
2.38.1