netdev - [PATCH xfrm-next 04/26] net/mlx5e: Advertise IPsec full offload support

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Date:   Tue, 16 Aug 2022 13:37:52 +0300
From:   Leon Romanovsky <leon@...nel.org>
To:     Steffen Klassert <steffen.klassert@...unet.com>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Saeed Mahameed <saeedm@...dia.com>
Cc:     Leon Romanovsky <leonro@...dia.com>,
        Eric Dumazet <edumazet@...gle.com>, netdev@...r.kernel.org,
        Paolo Abeni <pabeni@...hat.com>, Raed Salem <raeds@...dia.com>,
        ipsec-devel <devel@...ux-ipsec.org>
Subject: [PATCH xfrm-next 04/26] net/mlx5e: Advertise IPsec full offload support

From: Leon Romanovsky <leonro@...dia.com>

Add needed capabilities check to determine if device supports IPsec
full offload mode.

Reviewed-by: Raed Salem <raeds@...dia.com>
Signed-off-by: Leon Romanovsky <leonro@...dia.com>
---
 .../net/ethernet/mellanox/mlx5/core/en_accel/ipsec.h   |  1 +
 .../mellanox/mlx5/core/en_accel/ipsec_offload.c        | 10 ++++++++++
 2 files changed, 11 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.h b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.h
index 16bcceec16c4..feea909d76c6 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.h
@@ -88,6 +88,7 @@ struct mlx5_accel_esp_xfrm_attrs {
 enum mlx5_ipsec_cap {
 	MLX5_IPSEC_CAP_CRYPTO		= 1 << 0,
 	MLX5_IPSEC_CAP_ESN		= 1 << 1,
+	MLX5_IPSEC_CAP_FULL_OFFLOAD	= 1 << 2,
 };
 
 struct mlx5e_priv;
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec_offload.c b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec_offload.c
index 792724ce7336..e93775eb40b7 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec_offload.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec_offload.c
@@ -1,12 +1,14 @@
 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
 /* Copyright (c) 2017, Mellanox Technologies inc. All rights reserved. */
 
+#include <linux/mlx5/eswitch.h>
 #include "mlx5_core.h"
 #include "ipsec.h"
 #include "lib/mlx5.h"
 
 u32 mlx5_ipsec_device_caps(struct mlx5_core_dev *mdev)
 {
+	bool esw_encap;
 	u32 caps = 0;
 
 	if (!MLX5_CAP_GEN(mdev, ipsec_offload))
@@ -31,6 +33,14 @@ u32 mlx5_ipsec_device_caps(struct mlx5_core_dev *mdev)
 	    MLX5_CAP_ETH(mdev, insert_trailer) && MLX5_CAP_ETH(mdev, swp))
 		caps |= MLX5_IPSEC_CAP_CRYPTO;
 
+	esw_encap = mlx5_eswitch_get_encap_mode(mdev) !=
+		    DEVLINK_ESWITCH_ENCAP_MODE_NONE;
+	if (!esw_encap && MLX5_CAP_IPSEC(mdev, ipsec_full_offload) &&
+	    MLX5_CAP_FLOWTABLE_NIC_TX(mdev, reformat_add_esp_trasport) &&
+	    MLX5_CAP_FLOWTABLE_NIC_RX(mdev, reformat_del_esp_trasport) &&
+	    MLX5_CAP_FLOWTABLE_NIC_RX(mdev, decap))
+		caps |= MLX5_IPSEC_CAP_FULL_OFFLOAD;
+
 	if (!caps)
 		return 0;
 
-- 
2.37.2