gpu: nvgpu: Support sync framework with semaphores

Add sync_gk20a.c/h that support creating Android sync fence fd's from
gk20a semaphores.

Bug 1445450

Change-Id: I42272996721ceec38ba5510eae6770720bc9dd10
Signed-off-by: Lauri Peltonen <lpeltonen@nvidia.com>
Reviewed-on: http://git-master/r/374843
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 46 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/sync_gk20a.h b/drivers/gpu/nvgpu/gk20a/sync_gk20a.h
new file mode 100644
index 00000000..49597f06
--- /dev/null
+++ b/drivers/gpu/nvgpu/gk20a/sync_gk20a.h
@@ -0,0 +1,46 @@
+/*
+ * drivers/video/tegra/host/gk20a/sync_gk20a.h
+ *
+ * GK20A Sync Framework Integration
+ *
+ * Copyright (c) 2014, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ */
+
+#ifndef _GK20A_SYNC_H_
+#define _GK20A_SYNC_H_
+
+#include <linux/types.h>
+
+struct sync_timeline;
+struct sync_fence;
+struct sync_pt;
+struct gk20a_semaphore;
+
+#ifdef CONFIG_SYNC
+struct sync_timeline *gk20a_sync_timeline_create(const char *fmt, ...);
+void gk20a_sync_timeline_destroy(struct sync_timeline *);
+void gk20a_sync_timeline_signal(struct sync_timeline *);
+int gk20a_sync_fence_create(struct sync_timeline *,
+                struct gk20a_semaphore *,
+                struct sync_fence *dependency,
+                const char *fmt, ...);
+struct sync_fence *gk20a_sync_fence_fdget(int fd);
+#else
+static inline void gk20a_sync_timeline_destroy(struct sync_timeline *obj) {}
+static inline void gk20a_sync_timeline_signal(struct sync_timeline *obj) {}
+static inline struct sync_fence *gk20a_sync_fence_fdget(int fd)
+{
+        return NULL;
+}
+#endif
+
+#endif