linux-kernel - Re: [PATCH net-next 03/18] net: mvpp2: make sure we use single queue mode on PPv2.1

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Message-ID: <9fdd233e-5f22-aeb3-c179-f14c6bb960e7@cogentembedded.com>
Date:   Thu, 12 Jul 2018 17:10:58 +0300
From:   Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:     Maxime Chevallier <maxime.chevallier@...tlin.com>,
        davem@...emloft.net
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Antoine Tenart <antoine.tenart@...tlin.com>,
        thomas.petazzoni@...tlin.com, gregory.clement@...tlin.com,
        miquel.raynal@...tlin.com, nadavh@...vell.com, stefanc@...vell.com,
        ymarkman@...vell.com, mw@...ihalf.com
Subject: Re: [PATCH net-next 03/18] net: mvpp2: make sure we use single queue
 mode on PPv2.1

Hello!

On 07/12/2018 02:54 PM, Maxime Chevallier wrote:

> The PPv2 driver defines 2 "queue_modes" :
>  - QDIST_SINGLE_MODE, where we each port share one rx queue vector

   Doesn't look like "we" is needed here.

>    between all CPUs
>  - QDIST_MULTI_MODE, where each port has one rx queue vector per CPU.
> 
> Multi queue mode isn't available on PPv2.1, make sure we fallback to
> single mode when running on this revision.
> 
> Signed-off-by: Maxime Chevallier <maxime.chevallier@...tlin.com>
[...]

MBR, Sergei