2 files changed, 69 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/include/nvgpu/ptimer.h b/drivers/gpu/nvgpu/include/nvgpu/ptimer.h
index 54c6b20c..598e064f 100644
--- a/drivers/gpu/nvgpu/include/nvgpu/ptimer.h
+++ b/drivers/gpu/nvgpu/include/nvgpu/ptimer.h
@@ -31,8 +31,24 @@ struct nvgpu_cpu_time_correlation_sample {
         u64 gpu_timestamp;
 };
 
+/* PTIMER_REF_FREQ_HZ corresponds to a period of 32 nanoseconds.
+    32 ns is the resolution of ptimer. */
+#define PTIMER_REF_FREQ_HZ                      31250000
+
+static inline u32 ptimer_scalingfactor10x(u32 ptimer_src_freq)
+{
+        return (u32)(((u64)(PTIMER_REF_FREQ_HZ * 10)) / ptimer_src_freq);
+}
+
+static inline u32 scale_ptimer(u32 timeout , u32 scale10x)
+{
+        if (((timeout*10) % scale10x) >= (scale10x/2))
+                return ((timeout * 10) / scale10x) + 1;
+        else
+                return (timeout * 10) / scale10x;
+}
+
 int nvgpu_get_timestamps_zipper(struct gk20a *g,
                 u32 source_id, u32 count,
                 struct nvgpu_cpu_time_correlation_sample *samples);
-
 #endif
diff --git a/drivers/gpu/nvgpu/include/nvgpu/utils.h b/drivers/gpu/nvgpu/include/nvgpu/utils.h
new file mode 100644
index 00000000..22102fa3
--- /dev/null
+++ b/drivers/gpu/nvgpu/include/nvgpu/utils.h
@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2018, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef NVGPU_UTILS_H
+#define NVGPU_UTILS_H
+
+#include <nvgpu/types.h>
+
+static inline u32 u64_hi32(u64 n)
+{
+        return (u32)((n >> 32) & ~(u32)0);
+}
+
+static inline u32 u64_lo32(u64 n)
+{
+        return (u32)(n & ~(u32)0);
+}
+
+static inline u64 hi32_lo32_to_u64(u32 hi, u32 lo)
+{
+        return  (((u64)hi) << 32) | (u64)lo;
+}
+
+static inline u32 set_field(u32 val, u32 mask, u32 field)
+{
+        return ((val & ~mask) | field);
+}
+
+static inline u32 get_field(u32 reg, u32 mask)
+{
+        return (reg & mask);
+}
+#endif /* NVGPU_UTILS_H */