drm: extract legacy ctxbitmap flushing

[firefly-linux-kernel-4.4.55.git] / drivers / gpu / drm / drm_context.c

diff --git a/drivers/gpu/drm/drm_context.c b/drivers/gpu/drm/drm_context.c
index a4b017b6849efd79686693e0e5cad7b5edf9ae09..c045505978f1464b72d4d5621a840c9f8ab097d1 100644 (file)
--- a/drivers/gpu/drm/drm_context.c
+++ b/drivers/gpu/drm/drm_context.c
@@ -111,6 +111,36 @@ void drm_ctxbitmap_cleanup(struct drm_device * dev)
        mutex_unlock(&dev->struct_mutex);
 }
 
+/**
+ * drm_ctxbitmap_flush() - Flush all contexts owned by a file
+ * @dev: DRM device to operate on
+ * @file: Open file to flush contexts for
+ *
+ * This iterates over all contexts on @dev and drops them if they're owned by
+ * @file. Note that after this call returns, new contexts might be added if
+ * the file is still alive.
+ */
+void drm_ctxbitmap_flush(struct drm_device *dev, struct drm_file *file)
+{
+       struct drm_ctx_list *pos, *tmp;
+
+       mutex_lock(&dev->ctxlist_mutex);
+
+       list_for_each_entry_safe(pos, tmp, &dev->ctxlist, head) {
+               if (pos->tag == file &&
+                   pos->handle != DRM_KERNEL_CONTEXT) {
+                       if (dev->driver->context_dtor)
+                               dev->driver->context_dtor(dev, pos->handle);
+
+                       drm_ctxbitmap_free(dev, pos->handle);
+                       list_del(&pos->head);
+                       kfree(pos);
+               }
+       }
+
+       mutex_unlock(&dev->ctxlist_mutex);
+}
+
 /*@}*/
 
 /******************************************************************/