gpu: nvgpu: Move time correlation to common code

Time correlation does not have chip or OS specific dependencies, so
move it to generic new source file bus.c.

JIRA NVGPU-38

Change-Id: Ic7fdf8c9ccacf05baf1b3438a86b28e517093641
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: http://git-master/r/1505171
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 29 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/include/nvgpu/bus.h b/drivers/gpu/nvgpu/include/nvgpu/bus.h
new file mode 100644
index 00000000..096c084d
--- /dev/null
+++ b/drivers/gpu/nvgpu/include/nvgpu/bus.h
@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) 2017, 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 __NVGPU_BUS_H__
+#define __NVGPU_BUS_H__
+
+#include <nvgpu/types.h>
+
+struct gk20a;
+
+struct nvgpu_cpu_time_correlation_sample {
+        u64 cpu_timestamp;
+        u64 gpu_timestamp;
+};
+
+int nvgpu_get_timestamps_zipper(struct gk20a *g,
+                u32 source_id, u32 count,
+                struct nvgpu_cpu_time_correlation_sample *samples);
+
+#endif