IXGBE_MPKTHSIZE
#define IXGBE_RX_COPY_HDR_PADDED ((((IXGBE_MPKTHSIZE - 1) / 32) + 1) * 32)
#define IXGBE_RX_COPY_ALIGN (IXGBE_RX_COPY_HDR_PADDED - IXGBE_MPKTHSIZE)