04.01.2015 06:46, Adrian Chadd пишет:
> hi all,
>
> I've started overhauling the net80211 scan infrastructure so it can
> support fully-offloaded scan firmware (like the intel iwn(4) NICs, and
> the upcoming 7260 driver I'm hacking on.)
>
> I'd like this patch tested:
>
> https://people.freebsd.org/~adrian/net80211/20150103-net80211-scan-overhaul-1.diff
>
> This splits the scan code into two halves - the generic bits that
> drive when and what to do about scanning, and the bits that implement
> the software scanner.
>
> The software scanner is the bit that schedules channel changes,
> listens for probe response frames, adds them to the scan cache, aborts
> and goes back to the original channel when needed. It also tells the
> drivers that scanning is about to happen, so the driver can prepare to
> go off-channel for a bit.
>
> For the intel NICs (and other things, i'm sure) that do full scan
> offload, we just say "Hey, scan these channels, here's the SSIDs to
> actively probe for, tell me when you're done" and you get back probe
> response frames or scan command results with all the relevant
> information. The wireless stack doesn't have to control the process so
> fine-grained - as far as the stack and network interface is concerned,
> it's still associated and traffic is still queued as per normal. The
> NIC firmware itself takes care of scheduling the off-channel scan
> bits, sending the sleep frames as it goes off-channel temporarily,
> etc. It's supposed to be very transparent. We don't even have to send
> probe request frames during scanning - the firmware will do that for
> us.
>
> This work doesn't do all work required - it's just going to refactor
> out the scan bits. I still have to turn it into methods that intel and
> such can be overridden. I still have to go through and plumb the VAP
> power save state work so we don't actually send sleep/wakeup frames.
> All of that is done for us in the firmware.
>
> So I'd appreciate this getting some testing by FreeBSD-HEAD wifi
> users. If you see any issues then please let me know. I'm going to
> commit it in a couple of days so I can continue along the path of
> refactoring out this stuff and turning it into methods that the iwn
> and future drivers can override to implement their own scanning
> module.
>
> Thanks!
>
>
>
> -adrian
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I see your patch is already in HEAD. Works for me on Intel N2230 in
11g-mode.
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