PROCESSOR-SDK-AM65X: RSTP issue with several boards

Hello Milan,

Double-checking on this: Have you tested RSTP on a previous version of the SDK and seen different behavior? Or is this the first time you are testing it on AM65x?

I am not sure if the information on that page was ever actually tested on AM65x/AM64x (which is one reason we removed that page in the SDK 9.1 version of the AM65x Linux SDK docs). We do have a single line on turning STP on and off in the main SDK docs:

https://software-dl.ti.com/processor-sdk-linux/esd/AM65X/09_01_00_01/exports/docs/linux/Foundational_Components/PRU-ICSS/Linux_Drivers/PRU_ICSSG_Ethernet_Switch.html

Regards,

Nick

Yes we did a try on previous version first and there is same error. Then we did a try on latest release but we followed doc from SDK 8.x... All the time we did a tests on AM65x... I will try process setup in your link and I will let you know

Hello Milan, sounds good. If needed, I can ask around to see what testing has been done from our side on STP performance and expected terminal output.

Regards,

Nick

Thread has been unlocked.

Responding to "We did a test with AM64x and we do not have this kind of issue like on AM65x... we think it is issue with PRU on AM65x"

Was the AM64x test also on Linux kernel 6.1, or on a more recent Linux kernel version?

Could I get you to confirm the board revision for the AM65x (Assuming you are using the AM65x EVM instead of a custom board)?

Regards,

Nick

Yes it is AM65X EVM but SR1 as we do not have latest EVM... On AM64x we are based on latest TI SDK 11 with kernel 6.12. In case of AM65 it is SDK 9 as this one is only available from TI... I need to  see if I can check with some our custom images based on new kernel version 6.12 for AM65x but this is not something that is coming from TI

Hello Milan,

I have been told that there are firmware fixes for RSTP that were added to the AM64x firmware at some point, but not added to AM65x firmware for any existing SDK release. These RSTP fixes have been added to the AM65x firmware for the upcoming SDK 11.2 release. The fixes are not guaranteed to resolve the behavior you are observing, but they should get the AM64x and AM65x firmware to be identical (so if the behavior is fixed on AM64x kernel 6.12, that seems like an encouraging sign for AM65x kernel 6.12).

However, this firmware is written for AM65x SR2.0, where the PRU subsystem is very different than AM65x SR1.0 (e.g., 6 PRU cores per subsystem instead of 4).

Regards,

Nick

Hi Nick,

OK we are testing this with AM65x EVM GP SR2.0 

k3conf --cpuinfo

AM65x SR2.0 

This should be fine as we have SR1.0 but on HS EVM. we cannot use our AM64x HS EVM with your SDK and this is why we did with GP only

Hello Milan,

Got it.

It looks like the am65x-sr2 firmware was last updated 9 days ago. I am not sure if this firmware would work with Linux kernel 6.1, or if it would only work with Linux kernel 6.12. I will ask the firmware team if these binaries are the ones with RSTP fixes:
https://git.ti.com/cgit/processor-firmware/ti-linux-firmware/tree/ti-pruss?h=ti-linux-firmware

Regards,

Nick

The firmware team says those are the latest binaries. We are releasing the AM65x Linux SDK 11.2 soon (I think within the next week), so the team suggests waiting for the SDK 11.2 release to test the latest PRU binaries.

Regards,

Nick

SDK 11.2 is now live on TI.com

Thanks Nick... we will test this on our side too