I am using the Opteron A1100 SoC chip.
My requirement is to test/tune the Ethernet KR link. Link partner is an FPGA. I have successfully established a 10G KR link.
Question: Is there a way for me to enable serial loopback inside the SoC -- i.e. AMD Rx to Tx (basically, I want the SoC to re-transmit what it receives from the link partner)
I believe this is the easiest way for me to tune the link -- i.e. use FPGA analog configurability. I see that the PPR mentions Loop-Back mode. But, I can't find information on what it means and how to enable it.
Also, if anyone has ideas on how to tune the backplane (i.e. KR) link; I will take that!
Any help will be super appreciated! Thank You in advance!