netdev - [net-next 04/16] net/mlx5: E-Switch, Allow goto earlier chain if FW supports it

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Date:   Thu, 27 Feb 2020 16:44:34 -0800
From:   Saeed Mahameed <saeedm@...lanox.com>
To:     "David S. Miller" <davem@...emloft.net>, kuba@...nel.org
Cc:     netdev@...r.kernel.org, Roi Dayan <roid@...lanox.com>,
        Oz Shlomo <ozsh@...lanox.com>,
        Paul Blakey <paulb@...lanox.com>,
        Saeed Mahameed <saeedm@...lanox.com>
Subject: [net-next 04/16] net/mlx5: E-Switch, Allow goto earlier chain if FW supports it

From: Roi Dayan <roid@...lanox.com>

Mellanox FW can support this if ignore_flow_level capability exists.

Signed-off-by: Roi Dayan <roid@...lanox.com>
Reviewed-by: Oz Shlomo <ozsh@...lanox.com>
Reviewed-by: Paul Blakey <paulb@...lanox.com>
Signed-off-by: Saeed Mahameed <saeedm@...lanox.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_tc.c              | 3 ++-
 .../ethernet/mellanox/mlx5/core/eswitch_offloads_chains.c    | 5 +++++
 .../ethernet/mellanox/mlx5/core/eswitch_offloads_chains.h    | 2 ++
 3 files changed, 9 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 290cdf32bc5e..3be654ce83e5 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
@@ -3533,7 +3533,8 @@ static int parse_tc_fdb_actions(struct mlx5e_priv *priv,
 				NL_SET_ERR_MSG_MOD(extack, "Goto action is not supported");
 				return -EOPNOTSUPP;
 			}
-			if (dest_chain <= attr->chain) {
+			if (!mlx5_esw_chains_backwards_supported(esw) &&
+			    dest_chain <= attr->chain) {
 				NL_SET_ERR_MSG(extack, "Goto earlier chain isn't supported");
 				return -EOPNOTSUPP;
 			}
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads_chains.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads_chains.c
index 883c9e6ff0b2..60121f2ee6c5 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads_chains.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads_chains.c
@@ -97,6 +97,11 @@ bool mlx5_esw_chains_prios_supported(struct mlx5_eswitch *esw)
 	return esw->fdb_table.flags & ESW_FDB_CHAINS_AND_PRIOS_SUPPORTED;
 }
 
+bool mlx5_esw_chains_backwards_supported(struct mlx5_eswitch *esw)
+{
+	return fdb_ignore_flow_level_supported(esw);
+}
+
 u32 mlx5_esw_chains_get_chain_range(struct mlx5_eswitch *esw)
 {
 	if (!mlx5_esw_chains_prios_supported(esw))
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads_chains.h b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads_chains.h
index 2e13097fe348..4ae2baf2a7a1 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads_chains.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads_chains.h
@@ -6,6 +6,8 @@
 
 bool
 mlx5_esw_chains_prios_supported(struct mlx5_eswitch *esw);
+bool
+mlx5_esw_chains_backwards_supported(struct mlx5_eswitch *esw);
 u32
 mlx5_esw_chains_get_prio_range(struct mlx5_eswitch *esw);
 u32
-- 
2.24.1