net/mlx5e: psp: Hook PSP dev reg/unreg to profile enable/disable

devlink reload while PSP connections are active does:

mlx5_unload_one_devl_locked() -> mlx5_detach_device()
-> _mlx5e_suspend()
  -> mlx5e_detach_netdev()
    -> profile->cleanup_rx
    -> profile->cleanup_tx
  -> mlx5e_destroy_mdev_resources() -> mlx5_core_dealloc_pd() fails:
...
mlx5_core 0000:08:00.0: mlx5_cmd_out_err:821:(pid 19722):
DEALLOC_PD(0x801) op_mod(0x0) failed, status bad resource state(0x9),
syndrome (0xef0c8a), err(-22)
...

The reason for failure is the existence of TX keys, which are removed by
the PSP dev unregistration happening in:
profile->cleanup() -> mlx5e_psp_unregister() -> mlx5e_psp_cleanup()
  -> psp_dev_unregister()
...but this isn't invoked in the devlink reload flow, only when changing
the NIC profile (e.g. when transitioning to switchdev mode) or on dev
teardown.

Move PSP device registration into mlx5e_nic_enable(), and unregistration
into the corresponding mlx5e_nic_disable(). These functions are called
during netdev attach/detach after RX & TX are set up.
This ensures that the keys will be gone by the time the PD is destroyed.

Fixes: 89ee2d92f66c ("net/mlx5e: Support PSP offload functionality")
Signed-off-by: Cosmin Ratiu <cratiu@nvidia.com>
Reviewed-by: Dragos Tatulea <dtatulea@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/20260504181100.269334-4-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
index 5a46870c4b74..8e9443caa933 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
@@ -6023,7 +6023,6 @@ static int mlx5e_nic_init(struct mlx5_core_dev *mdev,
 	if (take_rtnl)
 		rtnl_lock();
 
-	mlx5e_psp_register(priv);
 	/* update XDP supported features */
 	mlx5e_set_xdp_feature(priv);
 
@@ -6036,7 +6035,6 @@ static int mlx5e_nic_init(struct mlx5_core_dev *mdev,
 static void mlx5e_nic_cleanup(struct mlx5e_priv *priv)
 {
 	mlx5e_health_destroy_reporters(priv);
-	mlx5e_psp_unregister(priv);
 	mlx5e_ktls_cleanup(priv);
 	mlx5e_psp_cleanup(priv);
 	mlx5e_fs_cleanup(priv->fs);
@@ -6160,6 +6158,7 @@ static void mlx5e_nic_enable(struct mlx5e_priv *priv)
 
 	mlx5e_fs_init_l2_addr(priv->fs, netdev);
 	mlx5e_ipsec_init(priv);
+	mlx5e_psp_register(priv);
 
 	err = mlx5e_macsec_init(priv);
 	if (err)
@@ -6230,6 +6229,7 @@ static void mlx5e_nic_disable(struct mlx5e_priv *priv)
 	mlx5_lag_remove_netdev(mdev, priv->netdev);
 	mlx5_vxlan_reset_to_default(mdev->vxlan);
 	mlx5e_macsec_cleanup(priv);
+	mlx5e_psp_unregister(priv);
 	mlx5e_ipsec_cleanup(priv);
 }