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

From: Jakub Kicinski <[email-masked]>
Date: Thu, 9 May 2024 20:04:35 -0700

From: Raed Salem <[email-masked]>

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 <[email-masked]>
Signed-off-by: Rahul Rameshbabu <[email-masked]>
Signed-off-by: Jakub Kicinski <[email-masked]>
---
 .../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