lkml.org 
[lkml]   [2001]   [Sep]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: inverse mmap() available?
    In article <3BB49438.1F2C59B3@berlin.de> you wrote:

    > Hello!
    >
    > Is there a way to map user space memory into kernel address space, e.g.
    > that i don't have to call get_user(var,...) but simply use var =
    > *user_space_ptr?
    >
    > What i intend to do (as the next step) is to DMA-transfer data directly
    > between a PCI device and user space memory. The buffer in user space
    > should be allocated with malloc(), so allocating a buffer in kernel and
    > mmap()-ping it to user space is not the solution..
    >
    > I guess this has been asked before, any links to further information
    > would be great.

    map_user_kiobuf is what you want :) Some more explanation at:

    ftp://ftp.openlinux.org/pub/people/hch/kio/kiobuf.txt

    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2005-03-22 13:03    [W:0.035 / U:0.660 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site