Linux: J6 Vayu EVM - CPSW driver - FQTSS Support (IEEE 802.1Qav)

Karikalan K

Tool/software: Linux

Hello,

I'm using J6 Vayu EVM board, I'm looking for support for FQTSS implementation.

As per AVB standard, for implementing FQTSS on end-station (Talker node), Traffic shaper algorithm (Credit-based shaper) should be implemented using hardware packet queue.

When I referred the TRM of J6, it is mentioned as GMAC_SW subsystem supports Audio/Video Bridging (P802.1Qav/D6.0). So I assumed that the board has the capability to implement FQTSS, and so Qav is implemented in CPSW driver.

When I looked the other thread of TI forum for configuring the CPSW driver in kernel, I couldn't get any info. And to my surprise I found few response(which is dated more than a year back) like CPSW driver is not supporting Qav.

I want to know whether in the latest updated CPSW driver supports FQTSS or not. If yes how to configure the same.

Note : I'm using GLSDK 7.04.00.03 and HW is J6 Vayu EVM Rev H.

Regards,

Karikalan

over 7 years ago

0 Yordan Kovachev over 7 years ago

TI__Guru**** 161600 points

We're looking into this. Feedback will be posted here.

Best Regards,
Yordan

0 Pavel Botev over 7 years ago

TI__Guru**** 170625 points

Hi Karikalan,

It seems that P802.1Qav is not supported in the DRA7x CPSW driver. See the below wiki pages regarding what is supported for the driver:

processors.wiki.ti.com/.../Processor_SDK_Linux_Automotive_Data_Sheet
processors.wiki.ti.com/.../Linux_Core_CPSW_User's_Guide

Regards,
Pavel

0 Karikalan K over 7 years ago in reply to Pavel Botev

Prodigy 160 points

Hi Pavel,

Thanks for your response.

If CPSW Driver not supporting P802.1Qav means, I need to know whether J6 EVM have hardware support for Qav or not?

If so, is there any plan in near future to add P802.1Qav feature in CPSW Driver from TI.

Regards,

Karikalan

0 Pavel Botev over 7 years ago in reply to Karikalan K

TI__Guru**** 170625 points

Karikalan,

Karikalan K said:
If CPSW Driver not supporting P802.1Qav means, I need to know whether J6 EVM have hardware support for Qav or not?

J6 EVM (link below) is based on DRA75x processor.

DRA75x processor Gigabit Ethernet Switch (GMAC_SW) support Audio/Video Bridging (P802.1Qav/D6.0). Thus I can state:

Yes, J6 EVM have hardware support for Qav.

See DRA75x/74x TRM (SPRUI30D), chapter 24.11 Gigabit Ethernet Switch (GMAC_SW)

See also DRA7x performance application report (link below), section 13 GMAC IP

Karikalan K said:
If so, is there any plan in near future to add P802.1Qav feature in CPSW Driver from TI.

I am not aware of such plans, I do not have any roadmap regardin the future of the DRA7x CPSW driver. You can double check this in our DRA7x forum, the experts there might know something more.

e2e.ti.com/.../1020

0 Karikalan K over 7 years ago in reply to Pavel Botev

Prodigy 160 points

Hi Pavel,

Thanks for your response and support.
I will check in DRA7x forum.

Regards,
Karikalan

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Linux: J6 Vayu EVM - CPSW driver - FQTSS Support (IEEE 802.1Qav)