/*
* Copyright (c) 2017, 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.
*/
#include <nvgpu/bus.h>
#include "gk20a/gk20a.h"
int nvgpu_get_timestamps_zipper(struct gk20a *g,
u32 source_id, u32 count,
struct nvgpu_cpu_time_correlation_sample *samples)
{
int err = 0;
unsigned int i = 0;
if (source_id != NVGPU_GPU_GET_CPU_TIME_CORRELATION_INFO_SRC_ID_TSC) {
nvgpu_err(g, "source_id %u not supported", source_id);
return -EINVAL;
}
if (gk20a_busy(g)) {
nvgpu_err(g, "GPU not powered on\n");
err = -EINVAL;
goto end;
}
for (i = 0; i < count; i++) {
err = g->ops.bus.read_ptimer(g, &samples[i].gpu_timestamp);
if (err)
return err;
samples[i].cpu_timestamp = (u64)get_cycles();
}
end:
gk20a_idle(g);
return err;
}
