How does Bluefield-3 DPA access CPU memory in DPU mode?

Infrastructure & Networking DOCA Enterprise Networking
1

Hi!

In DPU mode, the NIC resources and functionality are owned and controlled by the embedded Arm subsystem.

DPA can use flexio_copy_{from/to}_host to access Arm memory, but how can DPA access CPU memory?

Thank you for any help!

2

Maybe you want to know ‘External registered memory’.
Check the below content that demonstrates the window management.
Not pretty sure if this is just what you want.

https://docs.nvidia.com/doca/sdk/dpa+development/index.html#src-2681265977_id-.DPADevelopmentv2.7.0-FlexIOMemoryManagement