RX not aligned on U50

[yrpang]

Environments

• Ubuntu 20.04.5 LTS
• kernel 5.15.0-53-generic
• vivdao 2020.2
• Alveo U50

What did i do?

I generate bitstream and loaded it onto an Alveo U50 and reboot the machine. After that I try to insmod onic.ko.

What happend?

After reboot I can see the 01:00.0 Memory controller: Xilinx Corporation Device 903f on lspci result. But when I try to insmod I got CMAC 0 RX not aligned after waiting in the dmesg log and I cannot ping another machine it connected to.

The full log is following:

[  213.858893] OpenNIC Linux Kernel Driver 0.21
[  213.859161] onic 0000:01:00.0 onic1s0f0 (uninitialized): Set MAC address to 00:0a:35:9d:56:f1
[  213.859169] onic 0000:01:00.0: device is a master PF
[  213.859380] onic 0000:01:00.0: Allocated 8 queue vectors
[  213.859440] onic 0000:01:00.0: CMAC 0 RX_STATUS_REG value: 0x000000C0
[  218.832614] onic 0000:01:00.0: CMAC 0 RX_STATUS_REG value: 0x000000C0
[  218.832620] onic 0000:01:00.0: CMAC 0 RX not aligned after waiting
[  218.832627] onic 0000:01:00.0: Number of CMAC instances = 1
[  218.832689] onic 0000:01:00.0: Setup IRQ vector 146 with name onic1s0f0-0
[  218.832701] onic 0000:01:00.0: Setup IRQ vector 147 with name onic1s0f0-1
[  218.832713] onic 0000:01:00.0: Setup IRQ vector 148 with name onic1s0f0-2
[  218.832725] onic 0000:01:00.0: Setup IRQ vector 149 with name onic1s0f0-3
[  218.832736] onic 0000:01:00.0: Setup IRQ vector 150 with name onic1s0f0-4
[  218.832746] onic 0000:01:00.0: Setup IRQ vector 151 with name onic1s0f0-5
[  218.832758] onic 0000:01:00.0: Setup IRQ vector 152 with name onic1s0f0-6
[  218.832768] onic 0000:01:00.0: Setup IRQ vector 153 with name onic1s0f0-7
[  218.838351] onic 0000:01:00.0 enp1s0: renamed from onic1s0f0
[  218.906384] onic 0000:01:00.0 enp1s0: ethtool: onic_get_link port: 0   carrier ok: 1 -- rx status ok: 0
[  218.910071] onic 0000:01:00.0 enp1s0: ethtool: onic_get_link port: 0   carrier ok: 1 -- rx status ok: 0
[  219.840626] IPv6: ADDRCONF(NETDEV_CHANGE): enp1s0: link becomes ready
[  220.041218] userif-3: sent link down event.
[  220.041225] userif-3: sent link up event.

I checked the CMAC document and learned that the RX_STATUS_REG 0xC0 means "rx_internal_local_fault". Could you please give me some suggestions for troubleshooting or some ideas of potential problems?

[meohee]

Hello, did you solved it?

[yrpang]

Hello, did you solved it?

Yes, in the end, I found that the issue was with the optical module I was using.

[meohee]

Thank you for your response!! then may I ask which modules you changed?

[yrpang]

Thank you for your response!! then may I ask which modules you changed?

The issue I encountered was not with the FPGA design module, but with the optical module in the connecting lines. The optical module I was using wasn’t working.

I purchased a loopback optical module and tested it, finding that it worked. Then, I replaced the previous fiber optic cable with a copper cable.

Here are the links to the loopback module and the cable that eventually worked with the U50 for your reference:

• https://item.jd.com/100015148931.html
• https://item.jd.com/100011464927.html