The Promiscuous mode of operation for Ethernet Driver

Zhichao

Promiscuous mode is not supported in CPSW currently. Will fix the documentation.

with regards

Mugunthan V N

Hi Mugunthan,

Regarding the "TI81XX PSP 04.04.00.01 Feature Performance Guide", Promiscuous mode of operation is supported.

http://processors.wiki.ti.com/index.php/TI81XX_PSP_04.04.00.01_Feature_Performance_Guide

Is Promiscuous mode supported whether the cpsw is used with dual mac mode or switch mode?

Best regards,

Ayumi

Hello, Ayumi Namiki

Your reference is about TI816X exactly. TI816X and TI814X have different ethernet drivers. CPSW is the one of TI814X.

Mugunthan V N seems to know, and it is possible that he is right.

You can check yourself, as I did:

<EZSDK_LINUX_HOME>/drivers/net/cpsw.c

Judging from the comments in the source code there, it looks like that the promiscuous mode is not supported (on TI814X).

BR

Vladimir

Vladimir

Promiscuous mode is not supported in switch mode and dual emac mode.
Promiscuous mode is supported only in TI816x (Davinci EMAC ethernet driver), and Ethernet switch driver (CPSW in TI814x) is mentioned in another section in the below link http://processors.wiki.ti.com/index.php/TI81XX_PSP_04.04.00.01_Feature_Performance_Guide#Ethernet_Switch_Driver

Regards
Mugunthan V N

This is exactly what I meant. Thanks, Mugunthan V N.

BR

Vladimir

Mugunthan V N,

Thank you for your comment. Just one question, supporting Promiscuous mode for TI814x is planned in future PSP or not?

Best regards,

Ayumi

Ayumi

As of now there is no plans for promiscuous mode.

Regards
Mugunthan V N

Mugunthan V N,

Thank you for your reply. Is it just not planed or any H/W device issues for promiscuous mode?

Best regards,

Ayumi

Hello, Ayumi

I don't know. But my guess is that there is no HW issue, promiscuous mode is not implemented yet or planned because of the complexity of the driver.

BR

Vladimir

Hi, Vladimir

Could you please make certain of your answer, no HW issue? Because TI has no plan to release driver supporting promiscuous mode, so my customer needs to develop it by themselves or third party. But if it has HW issue, they will not be able to achieve promiscuous mode.

Best regards,

Ayumi

Ayumi,

As Mugunthan already pointed out the CPSW H/W does not support Promiscuous mode. The CPSW is a 3 ports switch designed to protect the local host from the other ports' unicast traffic. In normal operation the ALE (switching logic) will only forward unicast packets to the local host if the destination MAC matches the host port.

Benoit,

Thank you for your reply. I have additional 2 questions...

1) If using CPSW with single mode (use only 1 port), CPSW H/W restriction also be applicable or not?

2) According to your answer, it is seemed to depend on ALE logic operation. So if enable ALE_BYPASS in ALE_CONTROL register, all packets will be received and does CPSW have possibilities to support the Promiscuous mode?

Best regards,

Ayumi

Hello,

Ayumi, you are still chasing these two questions, right? Or they are answered?

Let's clarify this: You cannot move to another hardware, right?

BR

Vladimir

Vladimir,

Unfortunately we have already fixed h/w design, so cannot move to another device. We are considering to use the Promiscuous mode without changing h/w design, so asked whether this mode be usable by using cpsw with single port or by configuration of registers.

Best regards,

Ayumi

Benoit, thank you very much for your answers.

Ayumi, do you need something else in order to determine how to proceed? Let me know. Thank you.

BR

Vladimir

Benoit,

Thank you for your answer. If using only the host port (port0) in ALE bypass mode, we'll be able to achieve the Promiscuous mode on cpsw. Is this right?

Best regards,

Ayumi

Ayumi,

That is correct.

Benoit,

Thank you very much.

Best regards,

Ayumi