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Mikhail_a's avatar
Mikhail_a
Icon for Occasional Contributor rankOccasional Contributor
22 days ago

Agilex-7 AXI MCDMA for PCIe hang

Hi!  I'm working with AGIB023R18A1E1VC device and having issues with AXI Multichanned DMA IP for PCIe. Since I require a PCIe bridge, I configured the IP in MCDMA+BAS+BAM mode (PCIe Gen 4, 512-bit)...
Pcie
VenT_Altera's avatar
VenT_Altera
Icon for Frequent Contributor rankFrequent Contributor
16 days ago

Hi Mikhail_a 

Thank you for your reply.


Since you are using your own driver and application, to isolate whether the issue is software or hardware, please run our Example Design on your board. Port the Example Design to your platform and run the accompanying application. Follow the steps in the user guide to generate Example Design and run the application. https://docs.altera.com/r/docs/817911/25.3.1/axi-multichannel-dma-ip-for-pci-express-user-guide/functional-description?tocId=ak5zOaugZ0426etSxKRO0Q
You may generate the AXI-MM DMA Example Design and use the Custom or DPDK driver to perform the perfq_app or mcdma_test: AXI-MM DMA test. Please share your test results.

Also, could you share the design goal for your implementation? If MCDMA is not required, you might consider using BAM + BAS (user mode) to simplify the design.

Thanks.
Best Regards,
Ven 

VenT_Altera's avatar
VenT_Altera
Icon for Frequent Contributor rankFrequent Contributor
15 days ago

Hi Mikhail_a 

I understand that you observed the failure in Example Design as well. Let's focus on the Example Design. Please provide the log from the prerequisites setup to running the application and hit the errors. I'd like to see the exact commands and their output. Which driver (Custom or DPDK) and which AXI-MM DMA test did you perform (perfq_app or mcdma_test)? Please share the detailed steps in the log.  

Thanks.
Best Regards,
Ven 

  • Mikhail_a's avatar
    Mikhail_a
    Icon for Occasional Contributor rankOccasional Contributor
    15 days ago

    Hi VenT_Altera​ 

    Unfortunately I can't provide you with that information as it was done by the other team. 

    • VenT_Altera's avatar
      VenT_Altera
      Icon for Frequent Contributor rankFrequent Contributor
      2 days ago

      Hi Mikhail_a 

      May I know if you have any updates on my previous message?

      Thanks.
      Best Regards,
      Ven 

    • VenT_Altera's avatar
      VenT_Altera
      Icon for Frequent Contributor rankFrequent Contributor
      1 day ago

      Hi Mikhail_a 

      As we have not received any further feedback from you, I will step back at this time and allow the community to assist with any future follow-up questions you may have.  
       
      Thank you for engaging with us!

      Best Regards,
      Ven 

      • Mikhail_a's avatar
        Mikhail_a
        Icon for Occasional Contributor rankOccasional Contributor
        1 day ago

        Hi VenT_Altera​ 

        No updates as I told before we can't provide you with that data and can only provide the data we have. 

        We had to switch back to Avalon PCIe as AXI does't work, so hope it will be fixed in future releases. 

         

  • VenT_Altera's avatar
    VenT_Altera
    Icon for Frequent Contributor rankFrequent Contributor
    13 days ago

    Hi Mikhail_a 

    My understanding is that you ran the AXI-MM DMA Example Design application, either perfq_app or mcdma_test, using the provided driver, either Custom or DPDK. When running the application, you observed the failure: Writing 449 bytes to BAS, the host hang and subsequently reset.
    See Table 57 in the user guide for the application and supported test: https://docs.altera.com/r/docs/817911/25.3.1/axi-multichannel-dma-ip-for-pci-express-user-guide/design-example-overview    

    To run the application of the Example Design, I believe your team has followed the prerequisites steps and commands provided in the user guide: https://docs.altera.com/r/docs/683517/25.3.1/multi-channel-dma-ip-for-pci-express-design-example-user-guide/running-the-design-example-application-on-a-hardware-setup 
    Hence, please provide the log covering the full sequence, from the prerequisites setup up to the point where the errors occur.

    If my understanding is incorrect, please let me know.
    Please be advised that I will be out of the office next entire week, beginning Feb 16, and returning on Feb 23. Please expect a delay in response.  

    Thanks.
    Best Regards,
    Ven