netdev - Re: DSA Rate Limiting in 88E6390

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Message-ID: <fd08b6b3-3170-bf44-2f05-a0dd92ea868d@eks-engel.de>
Date:   Tue, 30 Jul 2019 11:58:55 +0200
From:   Benjamin Beckmeyer <beb@...-engel.de>
To:     Andrew Lunn <andrew@...n.ch>
CC:     <netdev@...r.kernel.org>
Subject: Re: DSA Rate Limiting in 88E6390


>> Hi all,
>> is there a possibility to set the rate limiting for the 6390 with linux tools?
>> I've seen that the driver will init all to zero, so rate limiting is disabled, 
>> but there is no solution for it in the ip tool?
>>
>> The only thing I found for rate limiting is the tc tool, but I guess this is 
>> only a software solution?
> Hi Benjamin
>
> In Linux, we accelerate the software solution by offloading it to the
> hardware. So TC is what you need here.
>  
>> Furthermore, does exist a table or a tutorial which functions DSA supports?
>> The background is that we are using the DSDT driver (in future maybe the UMSD
>> driver) but we would like to switch to the in kernel DSA entirely. And our
>> software is using some of the DSDT functions, so I have to find an 
>> alternative to these functions.
> The DSA framework supports offloading TC. There was some patches a
> while back adding ingress rate limiting to one of the DSA drivers, via
> TC. I forget which, and i don't think they have been merged yet. If
> you can find the patchset, it should give you a good idea how you can
> implement support in the mv88e6xxx driver.
>
> 	  Andrew

Hi Andrew,
I've searched the netdev mailing list for DSA and traffic, but can't find anything
about rate limiting till 2016. Do you have a hint, how I can find it?

Do you know if the patchset was for Marvell or maybe for another company?

Cheers,
Benjamin