On Mon, Aug 27, 2007 at 04:05:48PM -0600, Grant Grundler wrote:
> .....
> After reading the thread, my take is we need a more elegant way for a
> device driver to handle registration of DMA regions allocated by user
> space. The API would "make this page/region act like dma_alloc_coherent()".
> That implies strong ordering between CPU and DMA to/from the device.
> Maybe the code is the right thing and I want a name that makes
> sense in the context of current DMA API.
Need to think about this...
>
> On IRC, willy suggested an mmap() flag and that sounds reasonable too
> though I don't know if it's feasible.
>
Yeah, we're doing something like this now as a band-aid solution.
Not a flag to mmap(), but a magic offset value. But it wasn't
acceptable to the maintainer of the mthca IB driver (Roland
Dreier), hence the new proposal....
--
Arthur
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
