DMA_DSR1
axgbe_printf(1, "DMA DSR1 Reg (%08x) = %08x\n", DMA_DSR1,
XGMAC_IOREAD(pdata, DMA_DSR1));
tx_dsr = DMA_DSR1 + ((tx_qidx / DMA_DSRX_QPR) * DMA_DSRX_INC);