[PATCH net-next v12 19/19] net/mlx5e: Implement PSP key_rotate operation
From: Jakub Kicinski <kuba@kernel.org>
Date: 2025-09-16 00:06:19
Subsystem:
mellanox ethernet driver (mlx5e), mellanox ethernet innova drivers, mellanox mlx5 core vpi driver, networking drivers, the rest · Maintainers:
Saeed Mahameed, Tariq Toukan, Mark Bloch, Leon Romanovsky, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Raed Salem <redacted>
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 <redacted>
Signed-off-by: Rahul Rameshbabu <rrameshbabu@nvidia.com>
Signed-off-by: Cosmin Ratiu <redacted>
Signed-off-by: Daniel Zahka <daniel.zahka@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
Notes:
v1:
- https://lore.kernel.org/netdev/20240510030435.120935-16-kuba@kernel.org/ (local)
---
.../mellanox/mlx5/core/en_accel/psp.c | 23 +++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/psp.c b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/psp.c
index 372513edfb92..b4cb131c5f81 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/psp.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/psp.c@@ -827,11 +827,34 @@ static void mlx5e_psp_assoc_del(struct psp_dev *psd, struct psp_assoc *pas) atomic_dec(&psp->tx_key_cnt); } +static int mlx5e_psp_rotate_key(struct mlx5_core_dev *mdev) +{ + u32 in[MLX5_ST_SZ_DW(psp_rotate_key_in)] = {}; + u32 out[MLX5_ST_SZ_DW(psp_rotate_key_out)]; + + MLX5_SET(psp_rotate_key_in, in, opcode, + MLX5_CMD_OP_PSP_ROTATE_KEY); + + return mlx5_cmd_exec(mdev, in, sizeof(in), out, sizeof(out)); +} + +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_psp_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_psp_unregister(struct mlx5e_priv *priv)
--
2.51.0