net/mlx5e: kTLS, Add stats for number of deleted kTLS TX offloaded connections

Expose ethtool SW counter for the number of kTLS device-offloaded
TX connections that are finished and deleted.
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c

@@ -138,6 +138,7 @@ void mlx5e_ktls_del_tx(struct net_device *netdev, struct tls_context *tls_ctx)
 	priv = netdev_priv(netdev);
 	mdev = priv->mdev;
 
+	atomic64_inc(&priv_tx->sw_stats->tx_tls_del);
 	mlx5e_destroy_tis(mdev, priv_tx->tisn);
 	mlx5_ktls_destroy_key(mdev, priv_tx->key_id);
 	kfree(priv_tx);

drivers/net/ethernet/mellanox/mlx5/core/en_accel/tls.h

@@ -42,6 +42,7 @@
 
 struct mlx5e_tls_sw_stats {
 	atomic64_t tx_tls_ctx;
+	atomic64_t tx_tls_del;
 	atomic64_t tx_tls_drop_metadata;
 	atomic64_t tx_tls_drop_resync_alloc;
 	atomic64_t tx_tls_drop_no_sync_data;

drivers/net/ethernet/mellanox/mlx5/core/en_accel/tls_stats.c

@@ -47,6 +47,7 @@ static const struct counter_desc mlx5e_tls_sw_stats_desc[] = {
 
 static const struct counter_desc mlx5e_ktls_sw_stats_desc[] = {
 	{ MLX5E_DECLARE_STAT(struct mlx5e_tls_sw_stats, tx_tls_ctx) },
+	{ MLX5E_DECLARE_STAT(struct mlx5e_tls_sw_stats, tx_tls_del) },
 	{ MLX5E_DECLARE_STAT(struct mlx5e_tls_sw_stats, rx_tls_ctx) },
 	{ MLX5E_DECLARE_STAT(struct mlx5e_tls_sw_stats, rx_tls_del) },
 };