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...

dts.txt10 KB

embedded peripheral

operating system

RaduB_Altera

Occasional Contributor

10 days 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