netdev - Re: [PATCH 02/29] wimax: headers for kernel API and user space interaction

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Date:	Tue, 09 Dec 2008 00:29:54 +0100
From:	Johannes Berg <johannes@...solutions.net>
To:	Inaky Perez-Gonzalez <inaky@...ux.intel.com>
Cc:	netdev@...r.kernel.org, wimax@...uxwimax.org, greg@...ah.com
Subject: Re: [PATCH 02/29] wimax: headers for kernel API and user space
	interaction

On Mon, 2008-12-08 at 13:22 -0800, Inaky Perez-Gonzalez wrote:

> I am paying attention to what you say :) 

:)

> I don't want to have this iwpriv like thing for ever; remember that is an stop
> gap for the time being as (a) we have no other reference hardware and (b)
> our user space is still evolving.
> 
> We already started discussing in the wimax list (with Juuso, from Nokia) how
> a NAP-based API should look. My plan is to start working on it in the New
> Year, after I come back from vacation.

Good to hear. I'm a bit worried about the pain of removing an API again
on such short notice, but I guess you'll have to deal with that. Unless
you'd want to wait until you've figured it out, it's only another kernel
release without wimax that way... ;)

> > identical to netlink attributes, but just a bit different:
> > > + * This is the control protocol used by the host to control the i2400m
> > > + * device (scan, connect, disconnect...). This is sent to / received
> > > + * as control frames. These frames consist of a header and zero or
> > > + * more TLVs with information. We call each control frame a "message".
> >
> > Or isn't that what is contained in the WIMAX_GNL_MSG_DATA attribute? You
> > can nest netlink attributes, that would already make it a whole lot more
> > regular, rather than defining your own sub-protocol.
> 
> It is, but that is host-to-device (or better, host-to-firmware protocol), the
> device's specific protocol. I have no say on how it is. It is quite similar,
> in any case, as it is TLV based.
> 
> When the kernel level API is in place, a command sent over generic netlink 
> will be translated by the driver into a protocol-specific message and sent
> to the device.

Sounds great.

johannes

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