[gem] Manage the ringbuffer from the kernel in the GEM case.

This requires that the X Server use the execbuf interface for buffer
submission, as it no longer has direct access to the ring.  This is
therefore a flag day for the gem interface.

This also adds enter/leavevt ioctls for use by the X Server.  These would
get stubbed out in a modesetting implementation, but are required while
in an environment where the device's state is only managed by the DRM while
X has the VT.

1 files changed, 3 insertions, 0 deletions

diff --git a/linux-core/drmP.h b/linux-core/drmP.h
index 8246f44a..6a7f28d1 100644
--- a/linux-core/drmP.h
+++ b/linux-core/drmP.h
@@ -1371,6 +1371,9 @@ drm_gem_init (struct drm_device *dev);
 void
 drm_gem_object_free (struct kref *kref);
 
+struct drm_gem_object *
+drm_gem_object_alloc(struct drm_device *dev, size_t size);
+
 void
 drm_gem_object_handle_free (struct kref *kref);