AM6442: Speeds supported for PRP and HSR using PSDK Linux

Daolin-san,

Thank you for your reply.

I would recommend that our customer use ICSSG instead of CPSW.

The customer will test HSR Offload and PRP Offload by referring to the documents below.

software-dl.ti.com/.../HSR_Offload.html

software-dl.ti.com/.../PRP_Offload.html

For HSR/PRP Offload, is the link speed set according to the link partner through auto-negotiation?

For HSR/PRP Offload, is it possible to forcibly set the local link speed to 10 Mbps or 100 Mbps (for example, using ethtool)?

software-dl.ti.com/.../PRU_ICSSG_Ethernet.html
# ethtool -s eth1 duplex full speed 100

Best regards,

Daisuke

Daolin-san,

Thank you for your reply.

Our customer tested HSR/PRP Offload by referring to the documents below.

software-dl.ti.com/.../HSR_Offload.html

software-dl.ti.com/.../PRP_Offload.html

They operate at 1 Gbps by using auto-negotiation or 100 Mbps by forcibly fixing the link speed.

However, when forcibly fix it at 10 Mbps, they do not operate, and ping does not reach.

To forcibly fix it at 100 Mbps:
ethtool -s eth1 speed 100 duplex full autoneg off
ethtool -s eth2 speed 100 duplex full autoneg off

To forcibly fix it at 10 Mbps:
ethtool -s eth1 speed 10 duplex full autoneg off
ethtool -s eth2 speed 10 duplex full autoneg off

When communicating as normal Ethernet before executing the HSR/PRP Offload shell script, it operates even when forcibly fixed at 10 Mbps, and ping also succeeds.

Does HSR/PRP Offload support 10 Mbps?

Best regards,

Daisuke

Hi Daisuke, 

Daisuke Maeda said:

Does HSR/PRP Offload support 10 Mbps?

Is the customer testing on SDK 11.2? Is the customer using RT-Linux SDK or regular Linux SDK?

While I didn't get a chance to test with SDK 11.2 yet, on my SDK 11.1 setup with 3x AM64x EVM in an HSR ring, using the same "ethtool -s ethX speed 100 duplex full autoneg off" command to set speed to 10Mbps, I see that HSR offload is functional with ping. 

What is the customer's test topology? (i.e. 3x EVMs or 2x EVMs?, HSR or PRP?)

-Daolin

Daolin-san,

Thank you for your reply.

Daolin Qiu said:

Is the customer testing on SDK 11.2? Is the customer using RT-Linux SDK or regular Linux SDK?

As I linked in my original post, the customer is using the latest version (v11.02.08.02) of the regular Linux SDK.

Daisuke Maeda said:

PROCESSOR-SDK-LINUX-AM64X
www.ti.com/.../PROCESSOR-SDK-LINUX-AM64X
Version: 11.02.08.02
Release date: Dec 15, 2025

Daolin Qiu said:

What is the customer's test topology? (i.e. 3x EVMs or 2x EVMs?, HSR or PRP?)

The customer is directly connecting two TMDS64EVM boards and testing both HSR Offload and PRP Offload.

Best regards,

Daisuke

Hello Daisuke, 

Daisuke Maeda said:

However, when forcibly fix it at 10 Mbps, they do not operate, and ping does not reach.

I ran the HSR offload test on SDK 11.2 between two AM64x EVMs connected to each other and noticed that ping was able to reach when both paths are connected. When disconnecting one path/cable at a time, I did see some packet loss. Is the customer disconnecting a cable during their test or just testing if ping is functional when both paths are fully connected?

I have found some other HSR issues with latest SDK 11.2 that I've created bug reports for the team to look into. In the meantime, I would suggest the customer to continue evaluating HSR and PRP offload on SDK 11.1 since HSR/PRP offload functionality has been extensively tested on SDK 11.1.

-Daolin

Daolin-san,

Thank you for your reply.

Does SDK 11.1 support PRP?

Our customer tested HSR/PRP offload with SDK 11.1, but PRP did not work.

root@am64xx-evm:~# sh prp_setup.sh prp_hw eth1 eth2 192.168.1.20
ip=192.168.1.20
if=prp0
mac=70:ff:76:1f:3c:8e
slave-a=eth1
slave-b=eth2
Cannot find device "prp0"
[ 93.167512] icssg-prueth icssg1-eth eth1: Link is Down
[ 93.194441] icssg-prueth icssg1-eth eth2: Link is Down
[ 93.202338] remoteproc remoteproc7: stopped remote processor 3008a000.txpru
[ 93.210562] remoteproc remoteproc14: stopped remote processor 30084000.rtu
[ 93.217540] remoteproc remoteproc13: stopped remote processor 300b4000.pru
[ 93.224445] remoteproc remoteproc8: stopped remote processor 3008c000.txpru
[ 93.231451] remoteproc remoteproc16: stopped remote processor 30086000.rtu
[ 93.238350] remoteproc remoteproc15: stopped remote processor 300b8000.pru
Available offload features for eth1:
hsr-tag-ins-offload: off
hsr-tag-rm-offload: off
hsr-fwd-offload: off
hsr-dup-offload: off
Actual changes:
hsr-tag-ins-offload: on [not requested]
hsr-dup-offload: on
Enabled offload features for eth1:
hsr-tag-ins-offload: on
hsr-tag-rm-offload: on
hsr-fwd-offload: on
hsr-dup-offload: on
Available offload features for eth2:
hsr-tag-ins-offload: off
hsr-tag-rm-offload: off
hsr-fwd-offload: off
hsr-dup-offload: off
Actual changes:
hsr-tag-ins-offload: on [not requested]
hsr-dup-offload: on
Enabled offload features for eth2:
hsr-tag-ins-offload: on
hsr-tag-rm-offload: on
hsr-fwd-offload: on
hsr-dup-offload: on
[ 94.486747] icssg-prueth icssg1-eth eth1: timeout waiting for command done
[ 94.503900] icssg-prueth icssg1-eth eth2: timeout waiting for command done
[ 94.510839] icssg-prueth icssg1-eth: Failed to restart the firmwares, aborting the process
[ 97.567489] prp0: Slave A (eth1) is not up; please bring it up to get a fully working HSR network
[ 97.576432] prp0: Slave B (eth2) is not up; please bring it up to get a fully working HSR network
[ 97.608124] remoteproc remoteproc13: powering up 300b4000.pru
[ 97.614307] remoteproc remoteproc13: Direct firmware load for ti-pruss/am64x-sr2-pru0-pruprp-fw.elf failed with error -2
[ 97.625379] remoteproc remoteproc13: request_firmware failed: -2
[ 97.631523] icssg-prueth icssg1-eth: failed to boot PRU0: -2
RTNETLINK answers: No such file or directory
[ 97.654631] remoteproc remoteproc13: powering up 300b4000.pru
[ 97.660903] remoteproc remoteproc13: Direct firmware load for ti-pruss/am64x-sr2-pru0-pruprp-fw.elf failed with error -2
[ 97.671844] remoteproc remoteproc13: request_firmware failed: -2
[ 97.677947] icssg-prueth icssg1-eth: failed to boot PRU0: -2
RTNETLINK answers: No such file or directory

It appears that SDK 11.1 does not include the PRUSS firmware for PRP that is included in SDK 11.2.

am64x-sr2-pru0-pruprp-fw.elf
am64x-sr2-pru1-pruprp-fw.elf
am64x-sr2-rtu0-pruprp-fw.elf
am64x-sr2-rtu1-pruprp-fw.elf
am64x-sr2-txpru0-pruprp-fw.elf
am64x-sr2-txpru1-pruprp-fw.elf

root@am64xx-evm:~# ls /usr/lib/firmware/ti-pruss/
am335x-pru0-prueth-fw.elf     am64x-sr2-rtu1-prusw-fw.elf
am335x-pru0-pruhsr-fw.elf     am64x-sr2-txpru0-prueth-fw.elf
am335x-pru0-prusw-fw.elf      am64x-sr2-txpru0-pruhsr-fw.elf
am335x-pru1-prueth-fw.elf     am64x-sr2-txpru0-prusw-fw.elf
am335x-pru1-pruhsr-fw.elf     am64x-sr2-txpru1-prueth-fw.elf
am335x-pru1-prusw-fw.elf      am64x-sr2-txpru1-pruhsr-fw.elf
am437x-pru0-prueth-fw.elf     am64x-sr2-txpru1-prusw-fw.elf
am437x-pru0-pruhsr-fw.elf     am65x-pru0-prueth-fw.elf
am437x-pru0-prusw-fw.elf      am65x-pru1-prueth-fw.elf
am437x-pru1-prueth-fw.elf     am65x-rtu0-prueth-fw.elf
am437x-pru1-pruhsr-fw.elf     am65x-rtu1-prueth-fw.elf
am437x-pru1-prusw-fw.elf      am65x-sr2-pru0-prueth-fw.elf
am57xx-pru0-prueth-fw.elf     am65x-sr2-pru0-pruhsr-fw.elf
am57xx-pru0-pruhsr-fw.elf     am65x-sr2-pru0-prusw-fw.elf
am57xx-pru0-prusw-fw.elf      am65x-sr2-pru1-prueth-fw.elf
am57xx-pru1-prueth-fw.elf     am65x-sr2-pru1-pruhsr-fw.elf
am57xx-pru1-pruhsr-fw.elf     am65x-sr2-pru1-prusw-fw.elf
am57xx-pru1-prusw-fw.elf      am65x-sr2-rtu0-prueth-fw.elf
am64x-sr2-pru0-prueth-fw.elf  am65x-sr2-rtu0-pruhsr-fw.elf
am64x-sr2-pru0-pruhsr-fw.elf  am65x-sr2-rtu0-prusw-fw.elf
am64x-sr2-pru0-prusw-fw.elf   am65x-sr2-rtu1-prueth-fw.elf
am64x-sr2-pru1-prueth-fw.elf  am65x-sr2-rtu1-pruhsr-fw.elf
am64x-sr2-pru1-pruhsr-fw.elf  am65x-sr2-rtu1-prusw-fw.elf
am64x-sr2-pru1-prusw-fw.elf   am65x-sr2-txpru0-prueth-fw.elf
am64x-sr2-rtu0-prueth-fw.elf  am65x-sr2-txpru0-pruhsr-fw.elf
am64x-sr2-rtu0-pruhsr-fw.elf  am65x-sr2-txpru0-prusw-fw.elf
am64x-sr2-rtu0-prusw-fw.elf   am65x-sr2-txpru1-prueth-fw.elf
am64x-sr2-rtu1-prueth-fw.elf  am65x-sr2-txpru1-pruhsr-fw.elf
am64x-sr2-rtu1-pruhsr-fw.elf  am65x-sr2-txpru1-prusw-fw.elf

root@am64xx-evm:~# ls /usr/lib/firmware/ti-pruss/
am335x-pru0-prueth-fw.elf     am64x-sr2-rtu0-prusw-fw.elf
am335x-pru0-pruhsr-fw.elf     am64x-sr2-rtu1-prueth-fw.elf
am335x-pru0-pruprp-fw.elf     am64x-sr2-rtu1-pruhsr-fw.elf
am335x-pru0-prusw-fw.elf      am64x-sr2-rtu1-pruprp-fw.elf
am335x-pru1-prueth-fw.elf     am64x-sr2-rtu1-prusw-fw.elf
am335x-pru1-pruhsr-fw.elf     am64x-sr2-txpru0-prueth-fw.elf
am335x-pru1-pruprp-fw.elf     am64x-sr2-txpru0-pruhsr-fw.elf
am335x-pru1-prusw-fw.elf      am64x-sr2-txpru0-pruprp-fw.elf
am437x-pru0-prueth-fw.elf     am64x-sr2-txpru0-prusw-fw.elf
am437x-pru0-pruhsr-fw.elf     am64x-sr2-txpru1-prueth-fw.elf
am437x-pru0-pruprp-fw.elf     am64x-sr2-txpru1-pruhsr-fw.elf
am437x-pru0-prusw-fw.elf      am64x-sr2-txpru1-pruprp-fw.elf
am437x-pru1-prueth-fw.elf     am64x-sr2-txpru1-prusw-fw.elf
am437x-pru1-pruhsr-fw.elf     am65x-pru0-prueth-fw.elf
am437x-pru1-pruprp-fw.elf     am65x-pru1-prueth-fw.elf
am437x-pru1-prusw-fw.elf      am65x-rtu0-prueth-fw.elf
am57xx-pru0-prueth-fw.elf     am65x-rtu1-prueth-fw.elf
am57xx-pru0-pruhsr-fw.elf     am65x-sr2-pru0-prueth-fw.elf
am57xx-pru0-pruprp-fw.elf     am65x-sr2-pru0-pruhsr-fw.elf
am57xx-pru0-prusw-fw.elf      am65x-sr2-pru0-prusw-fw.elf
am57xx-pru1-prueth-fw.elf     am65x-sr2-pru1-prueth-fw.elf
am57xx-pru1-pruhsr-fw.elf     am65x-sr2-pru1-pruhsr-fw.elf
am57xx-pru1-pruprp-fw.elf     am65x-sr2-pru1-prusw-fw.elf
am57xx-pru1-prusw-fw.elf      am65x-sr2-rtu0-prueth-fw.elf
am64x-sr2-pru0-prueth-fw.elf  am65x-sr2-rtu0-pruhsr-fw.elf
am64x-sr2-pru0-pruhsr-fw.elf  am65x-sr2-rtu0-prusw-fw.elf
am64x-sr2-pru0-pruprp-fw.elf  am65x-sr2-rtu1-prueth-fw.elf
am64x-sr2-pru0-prusw-fw.elf   am65x-sr2-rtu1-pruhsr-fw.elf
am64x-sr2-pru1-prueth-fw.elf  am65x-sr2-rtu1-prusw-fw.elf
am64x-sr2-pru1-pruhsr-fw.elf  am65x-sr2-txpru0-prueth-fw.elf
am64x-sr2-pru1-pruprp-fw.elf  am65x-sr2-txpru0-pruhsr-fw.elf
am64x-sr2-pru1-prusw-fw.elf   am65x-sr2-txpru0-prusw-fw.elf
am64x-sr2-rtu0-prueth-fw.elf  am65x-sr2-txpru1-prueth-fw.elf
am64x-sr2-rtu0-pruhsr-fw.elf  am65x-sr2-txpru1-pruhsr-fw.elf
am64x-sr2-rtu0-pruprp-fw.elf  am65x-sr2-txpru1-prusw-fw.elf

I checked the firmware files in the prebuilt image below for SDK 11.1.

https://www.ti.com/tool/download/PROCESSOR-SDK-LINUX-AM64X/11.01.05.03
tisdk-default-image-am64xx-evm-11.01.05.03.rootfs.wic.xz

Best regards,

Daisuke

Hi Daolin-san,

Thank you for your reply.

I have created another thread about the gPTP with HSR and PRP.

e2e.ti.com/.../am6442-gptp-support-using-psdk-linux

By the way, I tried to test HSR and PRP offload and gPTP on TMDS64EVM, but I have not been able to test them because TMDS64EVM we own was broken due to power issues.

Best regards,

Daisuke

Hi Daolin-san,

Thank you for your reply.

Our customer will wait for the release of the next SDK 12.0 and will use it to test HSR/PRP (IEC 62439-3) + PTP (IEEE 1588/IEC 61588).

Best regards,

Daisuke