DMA_MBUF_DONE_THRESH
bcmgenet_tdma_ring_writel(priv, index, 1, DMA_MBUF_DONE_THRESH);
[DMA_MBUF_DONE_THRESH] = 0x24,
[DMA_MBUF_DONE_THRESH] = 0x18,
bcmgenet_tdma_ring_readl(priv, 0, DMA_MBUF_DONE_THRESH);
bcmgenet_rdma_ring_readl(priv, 0, DMA_MBUF_DONE_THRESH);
bcmgenet_rdma_ring_writel(priv, i, pkts, DMA_MBUF_DONE_THRESH);
DMA_MBUF_DONE_THRESH);