ave_dma_unmap
ave_dma_unmap(ndev, &priv->tx.desc[entry], DMA_TO_DEVICE);
ave_dma_unmap(ndev, &priv->rx.desc[entry], DMA_FROM_DEVICE);
ave_dma_unmap(ndev, &priv->tx.desc[done_idx],
ave_dma_unmap(ndev, &priv->rx.desc[proc_idx], DMA_FROM_DEVICE);