Re: Receive OMI support in mac80211?

[Johannes Berg <johannes@sipsolutions.net>]

On Fri, 2024-06-21 at 14:31 +0200, Johannes Berg wrote:
> Hey all,
> 
> We're contemplating adding some support for using (sending) OMI to save
> power or perhaps other reasons.
> 
> The implementation logic would seem to end up being somewhat similar to
> some other cases of changing parameters (CSA or simply AP doing
> HT/VHT/HE/EHT operation changes, VHT operating mode notification action
> frame), but 
> 
>  - for widening bandwidth/increasing NSS:
>     - update chanctx
>     - send OMI / wait / response
>     - update TX configuration for the STA it was sent to
> 
>  - for reducing bandwidth/NSS:
>     - update TX configuration for the STA it was sent to
>     - send OMI / wait / response
>     - update chanctx

Hmm. Maybe I sent this too early ;)

Maybe mac80211 shouldn't even do the TX configuration for the STA? It
would have to track this as a separate data point because it's due to
the *local* configuration, so it doesn't actually match the other things
that it's doing today ...

OTOH, if mac80211 does rate control? But maybe we don't really care
about that case? I don't really for iwlwifi ...

And then if we don't care about that part, all we need is to be able to
notify mac80211 about the BW change on that given connection.

johannes