netdev - Re: [PATCH net-next v2 00/12] Multiqueue + DSA untag support + fixes for mtk_eth

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Date:   Thu, 10 Nov 2022 19:44:12 +0100
From:   Felix Fietkau <nbd@....name>
To:     Vladimir Oltean <olteanv@...il.com>
Cc:     netdev@...r.kernel.org, Matthias Brugger <matthias.bgg@...il.com>,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH net-next v2 00/12] Multiqueue + DSA untag support + fixes
 for mtk_eth_soc

On 10.11.22 15:28, Vladimir Oltean wrote:
> On Wed, Nov 09, 2022 at 05:34:14PM +0100, Felix Fietkau wrote:
>> This series contains multiple improvements for mtk_eth_soc:
>> 
>> On devices with QDMA (MT7621 and newer), multiqueue support is implemented
>> by using the SoC's traffic shaper function, which sits on the DMA engine.
>> The driver exposes traffic shaper queues as network stack queues and configures
>> them to the link speed limit. This fixes an issue where traffic to slower ports
>> would drown out traffic to faster ports. It also fixes packet drops and jitter
>> when running hardware offloaded traffic alongside traffic from the CPU.
>> 
>> On MT7622, the DSA tag for MT753x switches can be untagged by the DMA engine,
>> which removes the need for header mangling in the DSA tag driver.
>> 
>> This is implemented by letting DSA skip the tag receive function, if the port
>> is passed via metadata dst type METADATA_HW_PORT_MUX
>> 
>> Also part of this series are a number of fixes to TSO/SG support
>> 
>> Changes in v2:
>> - drop the use of skb vlan tags to pass the port information to the tag driver,
>>   use metadata_dst instead
>> - fix a small issue in enabling untag
> 
> Please split the work and let's concentrate on one thing at a time
> without extra noise, for example DSA RX tag processing offload first,
> since that needs the most attention.
> 
> Also please use ./scripts/get_maintainer.pl when sending patches ;)
I did that. That's where most of the To/Cc's came from.

- Felix