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Arun_Prabakatr's avatar
Arun_Prabakatr
Icon for New Contributor rankNew Contributor
5 months ago

Operating system kernel-level FPGA bridge communication

We are using a custom (Agilex 5) platform and need to access the FPGA bridges from the Linux kernel. We are unable to locate the corresponding device tree nodes or modifications required to access th...
embedded peripheral
operating system
RaduB_Altera's avatar
RaduB_Altera
Icon for Occasional Contributor rankOccasional Contributor
1 month ago

Hi Arun,

It is not clear from the thread if your issue is solved.

To summarize, on Stratix 10 and newer devices, you will not see the bridges as individual entries in the device tree. The bridges can be enabled by running the 'bridge enable' command in U-Boot, which is also invoked automatically when using the 'bootm' with FPGA fabric configuration. The bridges are also automatically enabled when a Linux device tree overaly is applied.

The actul fabric configuration from Linux is similar on all Stratix 10 and newer devices. You can see an example for Agilex 7 here: https://altera-fpga.github.io/rel-25.3.1/embedded-designs/agilex-7/f-series/soc/fabric-config/ug-linux-fabric-config-agx7f-soc/

Please let me know if you still need help with this issue. I can provide a complete example if you let me know exactly what you need.

Thank you,
Radu

  • tehjingy_Altera's avatar
    tehjingy_Altera
    Icon for Regular Contributor rankRegular Contributor
    1 month ago

    hi Arun_Prabakatr 

     

    Please let me know if you have any further clarification needed for this case? 

     

  • tehjingy_Altera's avatar
    tehjingy_Altera
    Icon for Regular Contributor rankRegular Contributor
    1 month ago

    Dear Customer,

     

    Since no further clarification is needed on this thread, it will be transitioned to community support for further help on doubts in this thread.

    Please login to the Altera Community Forum and post a feed/response within the next 15 days to allow me to continue to support you. After 15 days, this thread will be transitioned to community support. The community users will be able to help you on your follow-up questions.

    Thank you for the questions and as always pleasure having you here.

     

    Best Wishes

    Altera Tech Support