Mesa (master): virgl: add texture_barrier stub

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Module: Mesa
Branch: master
Commit: 7ef86a03f01b63256f7bfef2892cfbbc4c7eb713
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=7ef86a03f01b63256f7bfef2892cfbbc4c7eb713

Author: Erik Faye-Lund <erik.faye-lund at collabora.com>
Date:   Fri Jul 20 11:10:20 2018 +0100

virgl: add texture_barrier stub

In gallium, supporting FBFETCH means supporting non-coherent fetches, but
in virglrenderer, due to technical reasons this is backed by coherent
fetches instead. This means we don't need to do anything for the barriers.

However, if we don't have a texture_barrier implementation, we get crashes
because the non-coherent extensions is exposed.

So, let's leave this as a NOP for now.

[airlied: I've got a more complete impl of this somewhere, once we
land the host side].
Reviewed-by: Dave Airlie <airlied at redhat.com>
Signed-off-by: Erik Faye-Lund <erik.faye-lund at collabora.com>

---

 src/gallium/drivers/virgl/virgl_context.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/gallium/drivers/virgl/virgl_context.c b/src/gallium/drivers/virgl/virgl_context.c
index ae1da33799..d1a1c98660 100644
--- a/src/gallium/drivers/virgl/virgl_context.c
+++ b/src/gallium/drivers/virgl/virgl_context.c
@@ -804,6 +804,12 @@ static void virgl_set_sampler_views(struct pipe_context *ctx,
    virgl_attach_res_sampler_views(vctx, shader_type);
 }
 
+static void
+virgl_texture_barrier(struct pipe_context *pctx, unsigned flags)
+{
+   /* stub */
+}
+
 static void virgl_destroy_sampler_view(struct pipe_context *ctx,
                                  struct pipe_sampler_view *view)
 {
@@ -1174,6 +1180,7 @@ struct pipe_context *virgl_context_create(struct pipe_screen *pscreen,
    vctx->base.create_sampler_view = virgl_create_sampler_view;
    vctx->base.sampler_view_destroy = virgl_destroy_sampler_view;
    vctx->base.set_sampler_views = virgl_set_sampler_views;
+   vctx->base.texture_barrier = virgl_texture_barrier;
 
    vctx->base.create_sampler_state = virgl_create_sampler_state;
    vctx->base.delete_sampler_state = virgl_delete_sampler_state;