netdev - [net-next 04/16] net/mlx5e: Check if inner FT is supported outside of create/destroy functions

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Date:   Mon, 26 Jul 2021 09:55:32 -0700
From:   Saeed Mahameed <saeed@...nel.org>
To:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     netdev@...r.kernel.org, Tariq Toukan <tariqt@...dia.com>,
        Maxim Mikityanskiy <maximmi@...dia.com>,
        Saeed Mahameed <saeedm@...dia.com>
Subject: [net-next 04/16] net/mlx5e: Check if inner FT is supported outside of create/destroy functions

From: Maxim Mikityanskiy <maximmi@...dia.com>

Move the mlx5e_tunnel_inner_ft_supported() check for inner flow tables
support outside of mlx5e_create_inner_ttc_table() and
mlx5e_destroy_inner_ttc_table(). It allows to avoid accessing invalid
TIRNs of inner indirect TIRs. In a later commit these accesses will be
replaced by getters that will WARN if inner indirect TIRs don't exist.

Signed-off-by: Maxim Mikityanskiy <maximmi@...dia.com>
Reviewed-by: Tariq Toukan <tariqt@...dia.com>
Signed-off-by: Saeed Mahameed <saeedm@...dia.com>
---
 .../net/ethernet/mellanox/mlx5/core/en_fs.c   | 31 +++++++++----------
 1 file changed, 15 insertions(+), 16 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_fs.c b/drivers/net/ethernet/mellanox/mlx5/core/en_fs.c
index 6464ac3f294e..1a38c527423e 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_fs.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_fs.c
@@ -1349,9 +1349,6 @@ static int mlx5e_create_inner_ttc_table(struct mlx5e_priv *priv, struct ttc_para
 	struct mlx5e_flow_table *ft = &ttc->ft;
 	int err;
 
-	if (!mlx5e_tunnel_inner_ft_supported(priv->mdev))
-		return 0;
-
 	ft->t = mlx5_create_flow_table(priv->fs.ns, &params->ft_attr);
 	if (IS_ERR(ft->t)) {
 		err = PTR_ERR(ft->t);
@@ -1377,9 +1374,6 @@ static int mlx5e_create_inner_ttc_table(struct mlx5e_priv *priv, struct ttc_para
 static void mlx5e_destroy_inner_ttc_table(struct mlx5e_priv *priv,
 					  struct mlx5e_ttc_table *ttc)
 {
-	if (!mlx5e_tunnel_inner_ft_supported(priv->mdev))
-		return;
-
 	mlx5e_cleanup_ttc_rules(ttc);
 	mlx5e_destroy_flow_table(&ttc->ft);
 }
@@ -1788,15 +1782,18 @@ int mlx5e_create_flow_steering(struct mlx5e_priv *priv)
 	}
 
 	mlx5e_set_ttc_basic_params(priv, &ttc_params);
-	mlx5e_set_inner_ttc_ft_params(&ttc_params);
-	for (tt = 0; tt < MLX5E_NUM_INDIR_TIRS; tt++)
-		ttc_params.indir_tirn[tt] = priv->inner_indir_tir[tt].tirn;
 
-	err = mlx5e_create_inner_ttc_table(priv, &ttc_params, &priv->fs.inner_ttc);
-	if (err) {
-		netdev_err(priv->netdev, "Failed to create inner ttc table, err=%d\n",
-			   err);
-		goto err_destroy_arfs_tables;
+	if (mlx5e_tunnel_inner_ft_supported(priv->mdev)) {
+		mlx5e_set_inner_ttc_ft_params(&ttc_params);
+		for (tt = 0; tt < MLX5E_NUM_INDIR_TIRS; tt++)
+			ttc_params.indir_tirn[tt] = priv->inner_indir_tir[tt].tirn;
+
+		err = mlx5e_create_inner_ttc_table(priv, &ttc_params, &priv->fs.inner_ttc);
+		if (err) {
+			netdev_err(priv->netdev, "Failed to create inner ttc table, err=%d\n",
+				   err);
+			goto err_destroy_arfs_tables;
+		}
 	}
 
 	mlx5e_set_ttc_ft_params(&ttc_params);
@@ -1839,7 +1836,8 @@ int mlx5e_create_flow_steering(struct mlx5e_priv *priv)
 err_destroy_ttc_table:
 	mlx5e_destroy_ttc_table(priv, &priv->fs.ttc);
 err_destroy_inner_ttc_table:
-	mlx5e_destroy_inner_ttc_table(priv, &priv->fs.inner_ttc);
+	if (mlx5e_tunnel_inner_ft_supported(priv->mdev))
+		mlx5e_destroy_inner_ttc_table(priv, &priv->fs.inner_ttc);
 err_destroy_arfs_tables:
 	mlx5e_arfs_destroy_tables(priv);
 
@@ -1852,7 +1850,8 @@ void mlx5e_destroy_flow_steering(struct mlx5e_priv *priv)
 	mlx5e_destroy_vlan_table(priv);
 	mlx5e_destroy_l2_table(priv);
 	mlx5e_destroy_ttc_table(priv, &priv->fs.ttc);
-	mlx5e_destroy_inner_ttc_table(priv, &priv->fs.inner_ttc);
+	if (mlx5e_tunnel_inner_ft_supported(priv->mdev))
+		mlx5e_destroy_inner_ttc_table(priv, &priv->fs.inner_ttc);
 	mlx5e_arfs_destroy_tables(priv);
 	mlx5e_ethtool_cleanup_steering(priv);
 }
-- 
2.31.1