On Thu, Oct 21, 2021 at 01:53:32PM +0100, Matthew Auld wrote: > We were overzealous here; even though discrete is non-LLC, it should > still be always coherent. > > Signed-off-by: Matthew Auld <matthew.auld@xxxxxxxxx> > Cc: Thomas Hellström <thomas.hellstrom@xxxxxxxxxxxxxxx> > --- > drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c b/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c > index a45d0ec2c5b6..848e81368043 100644 > --- a/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c > +++ b/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c > @@ -251,7 +251,8 @@ static int i915_gem_object_get_pages_dmabuf(struct drm_i915_gem_object *obj) > return PTR_ERR(pages); > > /* XXX: consider doing a vmap flush or something */ > - if (!HAS_LLC(i915) || i915_gem_object_can_bypass_llc(obj)) > + if ((!HAS_LLC(i915) && !IS_DGFX(i915)) || > + i915_gem_object_can_bypass_llc(obj)) > wbinvd_on_all_cpus(); I think a comment here why we do wbinvd and not clflush like everywhere else here would be good. There's the XXX, but it's kinda not explaining why vmap isn't a good idea. Just an aside. -Daneil > > sg_page_sizes = i915_sg_dma_sizes(pages->sgl); > -- > 2.26.3 > -- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch
