/*
* Copyright (c) 2017-2018, 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_PTIMER_H
#define NVGPU_PTIMER_H
#include <nvgpu/types.h>
struct gk20a;
struct nvgpu_cpu_time_correlation_sample {
u64 cpu_timestamp;
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
