+int
+i915_gem_madvise_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file_priv)
+{
+ struct drm_i915_gem_madvise *args = data;
+ struct drm_gem_object *obj;
+ struct drm_i915_gem_object *obj_priv;
+
+ switch (args->madv) {
+ case I915_MADV_DONTNEED:
+ case I915_MADV_WILLNEED:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ obj = drm_gem_object_lookup(dev, file_priv, args->handle);
+ if (obj == NULL) {
+ DRM_ERROR("Bad handle in i915_gem_madvise_ioctl(): %d\n",
+ args->handle);
+ return -EBADF;
+ }
+
+ mutex_lock(&dev->struct_mutex);
+ obj_priv = obj->driver_private;
+
+ if (obj_priv->pin_count) {
+ drm_gem_object_unreference(obj);
+ mutex_unlock(&dev->struct_mutex);
+
+ DRM_ERROR("Attempted i915_gem_madvise_ioctl() on a pinned object\n");
+ return -EINVAL;
+ }
+
+ obj_priv->madv = args->madv;
+ args->retained = obj_priv->gtt_space != NULL;
+
+ drm_gem_object_unreference(obj);
+ mutex_unlock(&dev->struct_mutex);
+
+ return 0;
+}
+