[PATCH net-next 04/10] net/mlx5e: Add data direct ethtool private flag

[Tariq Toukan <tariqt@nvidia.com>]

From: Dragos Tatulea <dtatulea@nvidia.com>

This patch adds the data direct private flag infrastructure.
The MLX5E_PFLAG_DATA_DIRECT flag is needed in the follow-up patches to
detect the configuration of data direct from the user side.

For now the flag can't be actually set. This will be implemented in a
follow-up patch once all pieces are put together.

This patch doesn't introduce any functional changes.

Signed-off-by: Dragos Tatulea <dtatulea@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en.h         | 1 +
 drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c | 6 ++++++
 2 files changed, 7 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en.h b/drivers/net/ethernet/mellanox/mlx5/core/en.h
index 000493f42912..c5bbe5adea45 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en.h
@@ -264,6 +264,7 @@ enum mlx5e_priv_flag {
 	MLX5E_PFLAG_XDP_TX_MPWQE,
 	MLX5E_PFLAG_SKB_TX_MPWQE,
 	MLX5E_PFLAG_TX_PORT_TS,
+	MLX5E_PFLAG_DATA_DIRECT,
 	MLX5E_NUM_PFLAGS, /* Keep last */
 };
 
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c b/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
index 261c466a4d36..b3eced1dd43f 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
@@ -2400,6 +2400,11 @@ static int set_pflag_tx_port_ts(struct net_device *netdev, bool enable)
 	return err;
 }
 
+static int set_pflag_data_direct(struct net_device *netdev, bool enable)
+{
+	return -EOPNOTSUPP;
+}
+
 static const struct pflag_desc mlx5e_priv_flags[MLX5E_NUM_PFLAGS] = {
 	{ "rx_cqe_moder",        set_pflag_rx_cqe_based_moder },
 	{ "tx_cqe_moder",        set_pflag_tx_cqe_based_moder },
@@ -2409,6 +2414,7 @@ static const struct pflag_desc mlx5e_priv_flags[MLX5E_NUM_PFLAGS] = {
 	{ "xdp_tx_mpwqe",        set_pflag_xdp_tx_mpwqe },
 	{ "skb_tx_mpwqe",        set_pflag_skb_tx_mpwqe },
 	{ "tx_port_ts",          set_pflag_tx_port_ts },
+	{ "data_direct",         set_pflag_data_direct },
 };
 
 static int mlx5e_handle_pflag(struct net_device *netdev,
-- 
2.44.0