RXDMA_CFIG1
return niu_set_and_wait_clear(np, RXDMA_CFIG1(channel),
u64 val = nr64(RXDMA_CFIG1(channel));
nw64(RXDMA_CFIG1(channel), val);
if (nr64(RXDMA_CFIG1(channel)) & RXDMA_CFIG1_QST)
nw64(RXDMA_CFIG1(channel), rp->mbox_dma >> 32);