[RFC net-next 15/15] net/mlx5e: Implement PSP key_rotate operation

Jakub Kicinski
2024-05-10T03:04:54Z

From: Raed Salem <raeds@nvidia.com>

Implement .key_rotate operation where when invoked will cause the HW to use
a new master key to derive PSP spi/key pairs with complience with PSP spec.

Signed-off-by: Raed Salem <raeds@nvidia.com>
Signed-off-by: Rahul Rameshbabu <rrameshbabu@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
.../net/ethernet/mellanox/mlx5/core/en_accel/nisp.c | 11 +++++++++++
1 file changed, 11 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/nisp.c b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/nisp.c
index 1131aa6e9b3d..cab4e79135d8 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/nisp.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/nisp.c
@@ -96,11 +96,22 @@ static void mlx5e_psp_assoc_del(struct psp_dev *psd, struct psp_assoc *pas)
atomic_dec(&nisp->tx_key_cnt);
}

+static int mlx5e_psp_key_rotate(struct psp_dev *psd, struct netlink_ext_ack *exack)
+{
+ struct mlx5e_priv *priv = netdev_priv(psd->main_netdev);
+
+ /* no support for protecting against external rotations */
+ psd->generation = 0;
+
+ return mlx5e_nisp_rotate_key(priv->mdev);
+}
+
static struct psp_dev_ops mlx5_psp_ops = {
.set_config = mlx5e_psp_set_config,
.rx_spi_alloc = mlx5e_psp_rx_spi_alloc,
.tx_key_add = mlx5e_psp_assoc_add,
.tx_key_del = mlx5e_psp_assoc_del,
+ .key_rotate = mlx5e_psp_key_rotate,
};

void mlx5e_nisp_unregister(struct mlx5e_priv *priv)
--
2.45.0