/*
* Copyright (c) 2019, 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/gk20a.h>
#include <nvgpu/pmu.h>
#include <nvgpu/power_features/pg.h>
bool nvgpu_pg_elpg_is_enabled(struct gk20a *g)
{
bool elpg_enabled;
nvgpu_log_fn(g, " ");
nvgpu_mutex_acquire(&g->cg_pg_lock);
elpg_enabled = g->elpg_enabled;
nvgpu_mutex_release(&g->cg_pg_lock);
return elpg_enabled;
}
int nvgpu_pg_elpg_enable(struct gk20a *g)
{
int err = 0;
nvgpu_log_fn(g, " ");
if (!g->can_elpg) {
return 0;
}
gk20a_gr_wait_initialized(g);
nvgpu_mutex_acquire(&g->cg_pg_lock);
if (g->elpg_enabled) {
err = nvgpu_pmu_pg_global_enable(g, true);
}
nvgpu_mutex_release(&g->cg_pg_lock);
return err;
}
int nvgpu_pg_elpg_disable(struct gk20a *g)
{
int err = 0;
nvgpu_log_fn(g, " ");
if (!g->can_elpg) {
return 0;
}
gk20a_gr_wait_initialized(g);
nvgpu_mutex_acquire(&g->cg_pg_lock);
if (g->elpg_enabled) {
err = nvgpu_pmu_pg_global_enable(g, false);
}
nvgpu_mutex_release(&g->cg_pg_lock);
return err;
}
int nvgpu_pg_elpg_set_elpg_enabled(struct gk20a *g, bool enable)
{
int err = 0;
bool change_mode = false;
nvgpu_log_fn(g, " ");
if (!g->can_elpg) {
return 0;
}
gk20a_gr_wait_initialized(g);
nvgpu_mutex_acquire(&g->cg_pg_lock);
if (enable) {
if (!g->elpg_enabled) {
change_mode = true;
g->elpg_enabled = true;
}
} else {
if (g->elpg_enabled) {
change_mode = true;
g->elpg_enabled = false;
}
}
if (!change_mode) {
goto done;
}
err = nvgpu_pmu_pg_global_enable(g, enable);
done:
nvgpu_mutex_release(&g->cg_pg_lock);
return err;
}
