netdev - Re: [PATCH wpan-next 1/6] ieee802154: Add support for user scanning requests

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Date:   Mon, 20 Feb 2023 22:05:43 -0500
From:   Alexander Aring <aahringo@...hat.com>
To:     Miquel Raynal <miquel.raynal@...tlin.com>
Cc:     Alexander Aring <alex.aring@...il.com>,
        Stefan Schmidt <stefan@...enfreihafen.org>,
        linux-wpan@...r.kernel.org,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Eric Dumazet <edumazet@...gle.com>, netdev@...r.kernel.org,
        David Girault <david.girault@...vo.com>,
        Romuald Despres <romuald.despres@...vo.com>,
        Frederic Blain <frederic.blain@...vo.com>,
        Nicolas Schodet <nico@...fr.eu.org>,
        Guilhem Imberton <guilhem.imberton@...vo.com>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: Re: [PATCH wpan-next 1/6] ieee802154: Add support for user scanning requests

Hi,

On Mon, Feb 20, 2023 at 9:54 PM Alexander Aring <aahringo@...hat.com> wrote:
>
> Hi,
>
> On Fri, Feb 17, 2023 at 3:53 AM Miquel Raynal <miquel.raynal@...tlin.com> wrote:
> ...
> > >
> > > ok, I am curious. Probably it is very driver/device specific but yea,
> > > HardMAC needs to at least support what 802.15.4 says, the rest is
> > > optional and result in -ENOTSUPP?
> >
> > TBH this is still a gray area in my mental model. I'm not sure what
> > these devices will really offer in terms of interfaces.
>
> ca8210 is one. They use those SAP-commands (MCPS-SAP and MLME-SAP)
> which are described by 802.15.4 spec... there is this cfg802154_ops
> structure which will redirect netlink to either SoftMAC or HardMAC it
> should somehow conform to this...
> However I think it should be the minimum functionality inside of this,
> there might be a lot of optional things which only SoftMAC supports.
> Also nl802154 should be oriented to this.
>
> Are you agreeing here?

it's just not nl802154/cfg802154 also sending specific kind of frames
out added to cfg802154 which we don't have yet inside of this
"callback structure to interfacing SoftMAC or HardMAC".

- Alex