[PATCH] wifi: mt76: add tx checksum offload for mt7915, mt7921, mt7981 and mt7986

[Aleksander Jan Bajkowski]

Hi Ben,

On 10/19/25 18:26, Ben Greear wrote:
> On 10/19/25 08:51, Aleksander Jan Bajkowski wrote:
>> Supports IPv4 and IPv6 TCP + UDP
>>
>> In various tests between MT7986 and Intel BE200, I observed a 
>> performance
>> boost ranging from 2 to 12%, with an average of 5.5%.
>>
>> I did the tests on the MT7915, MT7981, MT7986, and MT7921 variants. The
>> MT7922, MT7925, and MT799x are untouched for now and still have
>> checksumming disabled.
>
> At least with  7996, tcp csum only worked on the first few vdevs
> created in our testing, so we had to add logic to disable that flag
> on subsequent vdevs.
>
> Have you tried creating a bunch of station and/or vap vdevs to see if
> all of them can still transmit TCP traffic?
>
>
Thanks for the useful information. On all tested devices, I had a single
AP configured per device. I will try to create several APs for each device.

I also have a router with MT7996. A quick test shows that checksum
offload doesn't work on this router. MT7996 is visible in the system
as a single DBDC device. I have 3 APs configured there. Each on a
separate band (2.4/5/6 GHz).

Best regards,
Aleksander