Re: userland firmware loader?

From: Brian Fundakowski Feldman (green_at_freebsd.org)
Date: 07/10/04

  • Next message: M. Warner Losh: "Re: userland firmware loader?" 
    Date: Sat, 10 Jul 2004 11:16:47 -0400
To: Poul-Henning Kamp <phk@phk.freebsd.dk>

    On Sat, Jul 10, 2004 at 10:38:36AM +0200, Poul-Henning Kamp wrote:
    > In message <20040709232355.GB1626@green.homeunix.org>, Brian Fundakowski Feldma
    > n writes:
    >
    > >I'm writing a driver that uses a 100KB firmware file and could need to
    > >read it again, after initialization, to reset the device (or to load
    > >more). Since this device is primarily found in CardBus form, I think
    > >it makes a lot of sense to be able to get the firmware file at any time
    > >but without specific user intervention.
    > >
    > >Is this something devd should be doing?
    >
    > I would advocate a generic interface for retrieving firmware from userland.

    What do you think about using the normal devctl_notify(9) for pushing
    out firmware requests, and having a new device method that receives just
    a user data pointer and length for it to copyin(9)? It wouldn't be a
    very symmetrical API, but it seems like a way that might fit it into the
    current structure the easiest, devd and devctl and newbus. 

    -- 
Brian Fundakowski Feldman                           \'[ FreeBSD ]''''''''''\
  <> green@FreeBSD.org                               \  The Power to Serve! \
 Opinions expressed are my own.                       \,,,,,,,,,,,,,,,,,,,,,,\
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  • Next message: M. Warner Losh: "Re: userland firmware loader?"

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