1 files changed, 38 insertions, 0 deletions
diff --git a/src/gallium/winsys/drm/intel/gem/intel_be_fence.h b/src/gallium/winsys/drm/intel/gem/intel_be_fence.h
new file mode 100644
index 00000000000..0fe18f66f83
--- /dev/null
+++ b/src/gallium/winsys/drm/intel/gem/intel_be_fence.h
@@ -0,0 +1,38 @@
+
+#ifndef INTEL_BE_FENCE_H
+#define INTEL_BE_FENCE_H
+
+#include "pipe/p_defines.h"
+
+#include "drm.h"
+#include "intel_bufmgr.h"
+
+/**
+ * Because gem does not have fence's we have to create our own fences.
+ *
+ * They work by keeping the batchbuffer around and checking if that has
+ * been idled. If bo is NULL fence has expired.
+ */
+struct intel_be_fence
+{
+	uint32_t refcount;
+	drm_intel_bo *bo;
+};
+
+static INLINE void
+intel_be_fence_reference(struct intel_be_fence *f)
+{
+	f->refcount++;
+}
+
+static INLINE void
+intel_be_fence_unreference(struct intel_be_fence *f)
+{
+	if (!--f->refcount) {
+		if (f->bo)
+			drm_intel_bo_unreference(f->bo);
+		free(f);
+	}
+}
+
+#endif