[PATCH] S1G: Add support for freq_khz

[Jouni Malinen]

On Thu, May 04, 2023 at 02:00:31PM +1200, Gilad Itzkovitch wrote:
> This commit adds support for specifying a frequency in khz. The
> predominate use case is S1G. Many S1G channels are centered on frequencies
> which a MHz value does not support. Additional freq_khz parameters have
> been added as required to the key structures that maintain the operating
> parameters of a hostapd AP. These freq_khz params have been added to key
> functions alongside the traditional freq parameter as an alternative.
> 
> The extent of this commit is the support of core BSS functionality using
> freq_khz. It is intended that several follow up commits will make use of
> this concept to support more advanced features.
> 
> Because this commit has introduced an alternative parameter that is used
> instead of the traditional freq param we needed to introduce logic that
> would support this change. We opted for logic that checks if freq_khz is
> set, and if so, uses that parameter going forward, otherwise if freq_khz
> is not set, freq is used as per the existing use case.
> This approach prevents regression for existing code.
> 
> The kernel maintains frequencies by using a combination of freq and
> freq_offset parameters. This patch includes a number of changes to support
> this concept.

This patch on its own does not seem to enable additional functionality,
so it is a bit difficult to review this from the view point of how
appropriate this is for full S1G support.

Is there a publicly available set of patches that would enable S1G
support to the point of being able to use it with mac80211_hwsim in both
AP and STA modes to complete successful authentication?

While I would obviously prefer to apply smaller patches as separate
individual commits, I would like to be able to do that while reviewing a
set of patches that would result in something more meaningful getting
added once the full set is applied. Ideally, this would be something
that would allow at least some minimal testing to be done with
mac80211_hwsim.

-- 
Jouni Malinen                                            PGP id EFC895FA