Jesse Barnes wrote:
>
> On Mon, Sep 09, 2002 at 02:00:35PM -0400, Richard B. Johnson wrote:
> > Well I just read Documentation/DMA-mapping.txt as advised by David
> > and it seems as though it will no longer be possible to do what
> > many programmers have been wanting to do, to wit:
> >
> > (1) In user-code, allocate a buffer.
> > (2) Lock that buffer into memory.
> > (3) Call some driver that DMAs data to/from that buffer.
>
> It looks drivers/media/video/video-buf.c uses alloc_kiovec() and
> map_user_kiobuf() to do it.
For video-buf.c and for Imran's application, that's just a wrapper
which is used to get at get_user_pages().
It would be best to not use the kiobuf code please - its future is
up in the air. Just use get_user_pages() directly for now.
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This archive was generated by hypermail 2b29 : Sun Sep 15 2002 - 22:00:17 EST