ajax: The consumer of this will be software renderers. We're working on one right now that will be using dma-bufs from userspace.
Daniel: Thanks for your suggestions. I'll work on it and submit a v2.
On Fri Nov 21 2014 at 6:02:45 AM Adam Jackson <ajax@redhat.com> wrote:
On Thu, 2014-11-20 at 16:26 -0800, Zach Reizner wrote:
> This patch implements the virtual GEM driver with PRIME sharing which
> allows vgem to import a gem object from other drivers for the purpose
> of mmap-ing them to userspace.

The reason I initially wanted this was to get zero-copy llvmpipe, since
(besides making GLX conformance impossible) the image transfer parts of
drisw are easily the biggest part of the runtime overhead.  Is there a
userspace consumer of this anywhere?

- ajax