Error Handling
During read data transfers, the client can indicate read data errors by asserting
TARGET_AXI_RRESP to an error code (i.e., SLVERR or DECERR) on any valid
data transfer cycle. The PCIe Controller sends a completer abort completion status
back to the requester. The client must not do an early burst termination and transfer all the
data cycles as indicated by the TARGET_AXI_ARLEN signal during the request
cycle.