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/*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#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;
}
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