frontend/dma: Fix LitePCIeDMAWriter early termination.

enjoy-digital / litepcie

Small footprint and configurable PCIe core

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frontend/dma: Fix LitePCIeDMAWriter early termination. #85

Closed enjoy-digital closed 2 years ago

enjoy-digital commented 2 years ago

Remove end Signal.
Set req_done when early termination is detected and prevent accepting any new data until next descriptor.

tongchen126 commented 2 years ago

@enjoy-digital This patch works fine when executing consecutive DMA requests. It has been tested by starting more than two DMA requests, no early termination occurs.

enjoy-digital commented 2 years ago

Thanks @tongchen126 for the feedback. That's merged then.