Transactions that hit the PCIe to DMA space are routed to the DMA Subsystem for the PCIeDMA/Bridge Subsystem for PCI Express® internal configuration register bus. This bus supports 32 bits of address space and 32-bit read and write requests.
DMA/Bridge Subsystem for PCIe registers can be accessed from the host or from the AXI Slave interface. These registers should be used for programming the DMA and checking status.