TMDS64GPEVM: HSR/PRP interface configured at boot time

Jakub Grad

Part Number: TMDS64GPEVM

Hello

For our custom board based on AM6442 we build Linux image based on meta-ti yocto layers. I wanted to configure HSR PRP on our hardware. I have follow with this tutorial (https://software-dl.ti.com/processor-sdk-linux/esd/AM64X/08_01_00_39/exports/docs/linux/Foundational_Components/Kernel/Kernel_Drivers/Network/HSR_PRP.html) and I successfully configured prp0 interface. I wandering if it is possible to somehow avoid configure prp manually but instead let kernel do it at boot time so that everything is ready when finish boot process. Maybe it is possible to do by device tree?

Jakub

over 2 years ago

0 Pekka Varis over 2 years ago

TI__Mastermind 27050 points

Jakub Grad said:
I have follow with this tutorial (https://software-dl.ti.com/processor-sdk-linux/esd/AM64X/08_01_00_39/exports/docs/linux/Foundational_Components/Kernel/Kernel_Drivers/Network/HSR_PRP.html) and I successfully configured prp0 interface.

I'd recommend moving to the 9.0 SDK with the newer 6.1 kernel. This now includes HW switching offload for HSR.

Jakub Grad said:
I wandering if it is possible to somehow avoid configure prp manually but instead let kernel do it at boot time so that everything is ready when finish boot process. Maybe it is possible to do by device tree?

Have you tried modifying /etc/systemd/network/15-eth.network or adding a network configuration file. I don't think PRP is directly supported but you can call arbitrary scripts.

Pekka

0 Jakub Grad over 2 years ago in reply to Pekka Varis

Intellectual 720 points

Pekka thanks for response.

Pekka Varis said:
This now includes HW switching offload for HSR

So there is no need to type all those commands from tutorial? So how to enable PRP within kernel 6.1?

0 Pekka Varis over 2 years ago in reply to Pekka Varis

TI__Mastermind 27050 points

Jakub Grad said:
Pekka Varis said:
This now includes HW switching offload for HSR

So there is no need to type all those commands from tutorial? So how to enable PRP within kernel 6.1?

No, this is unrelated. I just wanted to note HSR is now with HW switching offload.

Pekka Varis said:
Jakub Grad said:
I wandering if it is possible to somehow avoid configure prp manually but instead let kernel do it at boot time so that everything is ready when finish boot process. Maybe it is possible to do by device tree?

Have you tried modifying /etc/systemd/network/15-eth.network or adding a network configuration file. I don't think PRP is directly supported but you can call arbitrary scripts.

Put the commands you want ("all those commands from the tutorial") to run at boot into a script (test.sh in my example, remember to make it executable chmod +x /usr/bin/test.sh ). Create a service you want to run at boot, so a file /etc/systemd/system/test.service . In that file type something like:

[Unit]                                                                                       
Description=PRP Mode Configuration Service                                                
                                                                                             
[Service]                                                                                    
ExecStart=/bin/sh /usr/bin/test.sh                                                           
                                                                                             
[Install]                                                                                    
WantedBy=default.target

then start it on every boot with systemctl enable /etc/systemd/system/test.service and sync .

You can look systemd general documentation to tune the approach to include what you want.

Pekka

0 Jakub Grad over 2 years ago in reply to Pekka Varis

Intellectual 720 points

Hello Pekka

I done it like you said. It is working! Thanks

Jakub

0 Pekka Varis over 2 years ago in reply to Jakub Grad

TI__Mastermind 27050 points

Great, closing the ticket.

Pekka

0 Jakub Grad over 2 years ago in reply to Pekka Varis

Intellectual 720 points

Hello

I would like to reopen this topic because I still have a problem with PRP but of different nature. After few days I received second EVM board to test if PRP is working. I have connected both boards with ICSSG PRU interfaces like in this tutorial link . On both boards ifconfig -a shows me PRP interfaces:

prp0      Link encap:Ethernet  HWaddr 70:FF:76:1C:0E:8C
          inet addr:192.168.2.21  Bcast:0.0.0.0  Mask:255.255.255.255
          BROADCAST MULTICAST  MTU:1494  Metric:1
          RX packets:0 errors:0 dropped:68 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)



prp0      Link encap:Ethernet  HWaddr 70:FF:74:1C:0E:8C
          inet addr:192.168.2.19  Bcast:0.0.0.0  Mask:255.255.255.255
          BROADCAST MULTICAST  MTU:1494  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

Both boards have different IP and MAC address. When I try to ping one of them from another I receiving message:

root@am64xx-evm:~# ping 192.168.2.21
PING 192.168.2.21 (192.168.2.21): 56 data bytes
ping: sendto: Network is unreachable

How to deal with that?

Thanks

Jakub

0 Rimika Gupta over 2 years ago in reply to Jakub Grad

TI__Intellectual 1920 points

Hi Jakub,

Can you try with latest version: 3.2.2.6. HSR PRP — Processor SDK AM64X Documentation.

This might resolve the issue.

Thanks and Regards,

Rimika

0 Jakub Grad over 2 years ago in reply to Rimika Gupta

Intellectual 720 points

I figured it out by defining ip route table manually.

0 Rimika Gupta over 2 years ago in reply to Jakub Grad

TI__Intellectual 1920 points

Hi Jakub,

Great!

I am closing the issue then.

Thanks and Regards,

Rimika

Processors

Processors forum

TMDS64GPEVM: HSR/PRP interface configured at boot time