mlx5e_skb_cb_get_hwts
hwts.hwtstamp = mlx5e_skb_cb_get_hwts(skb)->port_hwtstamp;
mlx5e_skb_cb_get_hwts(skb)->cqe_hwtstamp = hwtstamp;
mlx5e_skb_cb_get_hwts(skb)->port_hwtstamp = hwtstamp;
if (!mlx5e_skb_cb_get_hwts(skb)->cqe_hwtstamp ||
!mlx5e_skb_cb_get_hwts(skb)->port_hwtstamp)
ktime_t dma_tstamp = mlx5e_skb_cb_get_hwts(skb)->cqe_hwtstamp;
diff = abs(mlx5e_skb_cb_get_hwts(skb)->port_hwtstamp -
mlx5e_skb_cb_get_hwts(skb)->cqe_hwtstamp);