netdev - [PATCH RFC net-next v1 3/3] net/mlx5e: Advertise mlx5 ethernet driver updates sk_buff md

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Message-Id: <20231116182900.46052-4-rrameshbabu@nvidia.com>
Date: Thu, 16 Nov 2023 10:29:00 -0800
From: Rahul Rameshbabu <rrameshbabu@...dia.com>
To: netdev@...r.kernel.org
Cc: Leon Romanovsky <leon@...nel.org>,
	Saeed Mahameed <saeed@...nel.org>,
	Gal Pressman <gal@...dia.com>,
	Tariq Toukan <tariqt@...dia.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Rahul Rameshbabu <rrameshbabu@...dia.com>
Subject: [PATCH RFC net-next v1 3/3] net/mlx5e: Advertise mlx5 ethernet driver updates sk_buff md_dst for MACsec

mlx5 Rx flow steering and CQE handling enable the driver to be able to
update an skb's md_dst attribute as MACsec when MACsec traffic arrives when
a device is configured for offloading. Advertise this to the core stack to
take advantage of this capability.

Signed-off-by: Rahul Rameshbabu <rrameshbabu@...dia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c
index d4ebd8743114..0e5efe0d2c92 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c
@@ -475,6 +475,13 @@ static void update_macsec_epn(struct mlx5e_macsec_sa *sa, const struct macsec_ke
 	epn_state->overlap = next_pn_halves->lower < MLX5_MACSEC_EPN_SCOPE_MID ? 0 : 1;
 }
 
+static int mlx5e_macsec_dev_open(struct macsec_context *ctx)
+{
+	*ctx->offload_md_dst = true;
+
+	return 0;
+}
+
 static int mlx5e_macsec_add_txsa(struct macsec_context *ctx)
 {
 	struct mlx5e_priv *priv = macsec_netdev_priv(ctx->netdev);
@@ -1608,6 +1615,7 @@ static void mlx5e_macsec_aso_cleanup(struct mlx5e_macsec_aso *aso, struct mlx5_c
 }
 
 static const struct macsec_ops macsec_offload_ops = {
+	.mdo_dev_open = mlx5e_macsec_dev_open,
 	.mdo_add_txsa = mlx5e_macsec_add_txsa,
 	.mdo_upd_txsa = mlx5e_macsec_upd_txsa,
 	.mdo_del_txsa = mlx5e_macsec_del_txsa,
-- 
2.40.1