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From:   Kalle Valo <kvalo@codeaurora.org>
To:     Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Cc:     linux-wireless@vger.kernel.org, nbd@nbd.name
Subject: Re: [RFC 0/5] add XDP support to mt76x2e/mt76x0e drivers
References: <cover.1543343124.git.lorenzo.bianconi@redhat.com>
Date:   Wed, 28 Nov 2018 12:15:27 +0200
In-Reply-To: <cover.1543343124.git.lorenzo.bianconi@redhat.com> (Lorenzo
        Bianconi's message of "Tue, 27 Nov 2018 23:21:07 +0100")
Message-ID: <8736rla4ow.fsf@purkki.adurom.net>
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Lorenzo Bianconi <lorenzo.bianconi@redhat.com> writes:

> This series is intended as a playground to start experimenting/developing
> with XDP/eBPF over WiFi and collect ideas/concerns about it.
> Introduce XDP support to mt76x2e/mt76x0e drivers. Currently supported
> actions are:
> - XDP_PASS
> - XDP_ABORTED
> - XDP_DROP
> Introduce ndo_bpf mac80211 callback in order to to load a bpf
> program into low level driver XDP rx hook.
> This series has been tested through a simple bpf program (available here:
> https://github.com/LorenzoBianconi/bpf-workspace/tree/master/mt76_xdp_stats)
> used to count frame types received by the device.
> Possible eBPF use cases could be:
> - implement new statistics through bpf maps
> - implement fast packet filtering (e.g in monitor mode)
> - ...

This is most likely a stupid question, but why do this in the driver and
not in mac80211 so that all drivers could benefit from it? I guess there
are reasons for that, I just can't figure that out.

-- 
Kalle Valo