Re: [PATCH] wifi: mt76: add tx checksum offload for mt7915, mt7921, mt7981 and mt7986
From: Aleksander Jan Bajkowski
Date: Sat Oct 25 2025 - 18:01:13 EST
On 10/19/25 20:18, Ben Greear wrote:
On 10/19/25 09:43, Aleksander Jan Bajkowski wrote:
Hi Ben,
On 10/19/25 18:26, Ben Greear wrote:
On 10/19/25 08:51, Aleksander Jan Bajkowski wrote:Thanks for the useful information. On all tested devices, I had a single
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?
AP configured per device. I will try to create several APs for each device.
We can try it out as well.
I've tested multiple VAPs (15x AP + 1x station). It seems that everything
works fine on MT7915, MT7981, and MT7986. By connecting to the first
and last AP, tx checksum offload works correctly. MT7921 only supports
a single VAP, so I skipped testing it.
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
We have it working on 7996, but the patch is tangled in some other changes we made
with how wcid and such are allocated. We are still cleaning and testing patches
on top of Felix's tree, should have something to post sometime soon.
Maybe only the MT7996 is affected?