drm/v3d: Expose memory stats through fdinfo

Use the common DRM function `drm_show_memory_stats()` to expose standard
fdinfo memory stats.

V3D exposes global GPU memory stats through debugfs. Those stats will be
preserved while the DRM subsystem doesn't have a standard solution to
expose global GPU stats.
Signed-off-by: Maíra Canal <mcanal@igalia.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@igalia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240711142736.783816-1-mcanal@igalia.com

drivers/gpu/drm/v3d/v3d_bo.c

@@ -26,6 +26,17 @@
 #include "v3d_drv.h"
 #include "uapi/drm/v3d_drm.h"
 
+static enum drm_gem_object_status v3d_gem_status(struct drm_gem_object *obj)
+{
+	struct v3d_bo *bo = to_v3d_bo(obj);
+	enum drm_gem_object_status res = 0;
+
+	if (bo->base.pages)
+		res |= DRM_GEM_OBJECT_RESIDENT;
+
+	return res;
+}
+
 /* Called DRM core on the last userspace/kernel unreference of the
  * BO.
  */
@@ -63,6 +74,7 @@ static const struct drm_gem_object_funcs v3d_gem_funcs = {
 	.vmap = drm_gem_shmem_object_vmap,
 	.vunmap = drm_gem_shmem_object_vunmap,
 	.mmap = drm_gem_shmem_object_mmap,
+	.status = v3d_gem_status,
 	.vm_ops = &drm_gem_shmem_vm_ops,
 };
 

drivers/gpu/drm/v3d/v3d_drv.c

@@ -184,6 +184,8 @@ static void v3d_show_fdinfo(struct drm_printer *p, struct drm_file *file)
 		drm_printf(p, "v3d-jobs-%s: \t%llu jobs\n",
 			   v3d_queue_to_string(queue), jobs_completed);
 	}
+
+	drm_show_memory_stats(p, file);
 }
 
 static const struct file_operations v3d_drm_fops = {