4.2.3.3 SGDMA—Operations

The following instructions describe running SGDMA operations between PC and DDR3L, PC and DDR4:

  1. Select one of the following options from the DMA Transfer Type Selection drop-down list:

    • PC -> DDR3L—to transfer the data from host PC to PolarFire DDR3L memory
    • DDR3L-> PC—to transfer the data from PolarFire DDR3L memory to host PC
    • Both PC <->DDR3L—to transfer the data from host PC to and from PolarFire DDR3L memory
    • PC -> DDR4—to transfer the data from host PC to PolarFire DDR4 memory
    • DDR4-> PC—to transfer the data from PolarFire DDR4 memory to host PC
    • Both PC <->DDR4—to transfer the data from host PC to and from PolarFire DDR4 memory
  2. Select Transfer Size (4 KB to 1 MB) from the drop-down list.
  3. Enter the Loop Count in the box. The Buffer Descriptors show the number of descriptors created by the host driver for each SGDMA operation.
  4. Click Start Transfer. After a successful DMA operation, the GUI displays the throughput and average throughput in MBps.