[lkml]   [2007]   [Feb]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: [PATCH 2.6.20 1/1] fbdev,mm: hecuba/E-Ink fbdev driver
    On 2/19/07, Paul Mundt <> wrote:
    > On Mon, Feb 19, 2007 at 11:13:04PM -0500, Jaya Kumar wrote:
    > >
    > > Ok. Here's what I'm thinking for abstracting this:
    > >
    > > fbdev drivers would setup fb_mmap with their own_mmap as usual. In
    > > own_mmap, they would do what they normally do and setup a vm_ops. They
    > > are free to have their own nopage handler but would set the
    > > page_mkwrite handler to be fbdev_deferred_io_mkwrite().
    > The vast majority of drivers do not implement ->fb_mmap(), and with
    > proper abstraction, this should be something that's possible as a direct
    > alternative to drivers/video/fbmem.c:fb_mmap() for the people that want
    > it. Of course it's just as easy to do something like the sbuslib.c route
    > and then have drivers set their ->fb_mmap() from that too.

    I was thinking about having that fb_mmap replacement too. But then I
    got worried because that generic implementation of nopage/etc would
    need to handle whether the driver's fb memory was vmalloced, kmalloced
    or a mixture if some do that. So I figured let's aim low and just pull
    in the core part that does the setup and page tracking stuff. I hope
    that's okay.

    > That works for me, though I'd prefer for struct page_list to be done with
    > a scatterlist, then it's trivial to setup from the workqueue context
    > without having to shuffle things around.

    Ok. Will check out when implementing.

    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to
    More majordomo info at
    Please read the FAQ at

     \ /
      Last update: 2007-02-20 07:15    [W:0.023 / U:0.052 seconds]
    ©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site