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Message-ID: <d919fd21c36bd72955ff18190fe628eae438b098.camel@sipsolutions.net>
Subject: Re: [PATCH] mac80211_hwsim: indicate support for 60GHz channels
From:   Johannes Berg <johannes@sipsolutions.net>
To:     Ramon Fontes <ramonreisfontes@gmail.com>
Cc:     linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
        linux-wireless <linux-wireless@vger.kernel.org>,
        kvalo@codeaurora.org, davem@davemloft.net
Date:   Wed, 14 Apr 2021 17:09:53 +0200
In-Reply-To: <CAK8U23ZXs1LYFXaXKmNfT3M4yXPGhoGoFNh4r4G45YaMHtU-Xg@mail.gmail.com> (sfid-20210414_170712_484139_3E38AB65)
References: <20210413010613.50128-1-ramonreisfontes@gmail.com>
         <4d0a27c465522ddd8d6ae1e552221c707ec05b22.camel@sipsolutions.net>
         <CAK8U23ZXs1LYFXaXKmNfT3M4yXPGhoGoFNh4r4G45YaMHtU-Xg@mail.gmail.com>
         (sfid-20210414_170712_484139_3E38AB65)
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On Wed, 2021-04-14 at 12:06 -0300, Ramon Fontes wrote:
> > Advertise 60GHz channels to mac80211.
> Oh.. That was a mistake. Sorry for that.
> 
> Anyway, can we indicate 60GHz support even though it is not being
> supported by mac80211 yet?
> 
No, that makes no sense. DMG operation is significantly different from
non-DMG operation, even the A-MSDU format for example (an abbreviated
format called "short A-MSDU" is used in DMG). Similarly beacons, etc.,
all kinds of operations are significantly different.

Adding 60 GHz channels to hwsim would be essentially operating as non-
DMG yet on a DMG channel, which makes no sense.

I don't think anyone's planning to add DMG support to mac80211, and in
the absence of a real driver requiring that it wouldn't make sense
anyway. Quite possibly, it simply doesn't make sense period, because DMG
operation is sufficiently different.

johannes