On Thu, Oct 22, 2015 at 10:04:55AM +0200, Daniel Vetter wrote: > On Wed, Oct 21, 2015 at 04:24:58PM +0100, Chris Wilson wrote: > > Our GPUs impose certain requirements upon buffers that depend upon how > > exactly they are used. Typically this is expressed as that they require > > a larger surface than would be naively computed by pitch * height. > > Normally such requirements are hidden away in the userspace driver, but > > when we accept pointers from strangers and later impose extra conditions > > on them, the original client allocator has no idea about the > > monstrosities in the GPU and we require the userspace driver to inform > > the kernel how many padding pages are required beyond the client > > allocation. > > > > v2: Long time, no see > > > > Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> > > Cc: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx> > > Usual "needs igt + open-source userspace" broken record from maintainer, > in case someone really wants to use this. Noises I've heard is that it's > for opencl, but who knows. igt sent many, many months ago. My user, once again, is in policing DRI3 and userptr. -Chris -- Chris Wilson, Intel Open Source Technology Centre _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
