EDMA_REQQIP
reg = MVSATA_EDMA_READ_4(mvport, EDMA_REQQIP);
MVSATA_EDMA_WRITE_4(mvport, EDMA_REQQIP,
MVSATA_EDMA_WRITE_4(mvport, EDMA_REQQIP,
MVSATA_EDMA_WRITE_4(mvport, EDMA_REQQIP, 0);
MVSATA_EDMA_WRITE_4(mvport, EDMA_REQQIP, 0);