netdev - [net-next 3/9] net/mlx5e: Enable setting multiple match criteria for flow group

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Date:   Fri, 31 May 2019 20:09:26 +0000
From:   Saeed Mahameed <saeedm@...lanox.com>
To:     "David S. Miller" <davem@...emloft.net>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Yevgeny Kliteynik <kliteyn@...lanox.com>,
        Oz Shlomo <ozsh@...lanox.com>,
        Saeed Mahameed <saeedm@...lanox.com>
Subject: [net-next 3/9] net/mlx5e: Enable setting multiple match criteria for
 flow group

From: Yevgeny Kliteynik <kliteyn@...lanox.com>

When filling in flow spec match criteria, to allow previous
modifications of the match criteria, use "|=" rather than "=".

Tunnel options are parsed before the match criteria of the offloaded
flow are being set. If the the flow that we're about to offload has
encapsulation options, the flow group might need to match on additional
criteria.

For Geneve, an additional flow group matching parameter should
be used - misc3. The appropriate bit in the match criteria is set
while parsing the tunnel options, so the criteria value shouldn't
be overwritten.

This is a pre-step for supporting Geneve TLV options offload.

Reviewed-by: Oz Shlomo <ozsh@...lanox.com>
Signed-off-by: Yevgeny Kliteynik <kliteyn@...lanox.com>
Signed-off-by: Saeed Mahameed <saeedm@...lanox.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_tc.c           | 2 +-
 .../net/ethernet/mellanox/mlx5/core/eswitch_offloads.c    | 8 ++++----
 2 files changed, 5 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 1c49b745b579..8e2d8e735faa 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
@@ -799,7 +799,7 @@ mlx5e_tc_add_nic_flow(struct mlx5e_priv *priv,
 	}
 
 	if (attr->match_level != MLX5_MATCH_NONE)
-		parse_attr->spec.match_criteria_enable = MLX5_MATCH_OUTER_HEADERS;
+		parse_attr->spec.match_criteria_enable |= MLX5_MATCH_OUTER_HEADERS;
 
 	flow->rule[0] = mlx5_add_flow_rules(priv->fs.tc.t, &parse_attr->spec,
 					    &flow_act, dest, dest_ix);
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
index d987bd06935d..a8c6683c3349 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
@@ -173,7 +173,7 @@ mlx5_eswitch_add_offloaded_rule(struct mlx5_eswitch *esw,
 		MLX5_SET_TO_ONES(fte_match_set_misc, misc,
 				 source_eswitch_owner_vhca_id);
 
-	spec->match_criteria_enable = MLX5_MATCH_MISC_PARAMETERS;
+	spec->match_criteria_enable |= MLX5_MATCH_MISC_PARAMETERS;
 	if (flow_act.action & MLX5_FLOW_CONTEXT_ACTION_DECAP) {
 		if (attr->tunnel_match_level != MLX5_MATCH_NONE)
 			spec->match_criteria_enable |= MLX5_MATCH_OUTER_HEADERS;
@@ -266,10 +266,10 @@ mlx5_eswitch_add_fwd_rule(struct mlx5_eswitch *esw,
 				 source_eswitch_owner_vhca_id);
 
 	if (attr->match_level == MLX5_MATCH_NONE)
-		spec->match_criteria_enable = MLX5_MATCH_MISC_PARAMETERS;
+		spec->match_criteria_enable |= MLX5_MATCH_MISC_PARAMETERS;
 	else
-		spec->match_criteria_enable = MLX5_MATCH_OUTER_HEADERS |
-					      MLX5_MATCH_MISC_PARAMETERS;
+		spec->match_criteria_enable |= MLX5_MATCH_OUTER_HEADERS |
+					       MLX5_MATCH_MISC_PARAMETERS;
 
 	rule = mlx5_add_flow_rules(fast_fdb, spec, &flow_act, dest, i);
 
-- 
2.21.0