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gpu: nvgpu: add cg and pg function

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Add new power/clock gating functions that can be called by
other units.

New clock_gating functions will reside in cg.c under
common/power_features/cg unit.

New power gating functions will reside in pg.c under
common/power_features/pg unit.

Use nvgpu_pg_elpg_disable and nvgpu_pg_elpg_enable to disable/enable
elpg and also in gr_gk20a_elpg_protected macro to access gr registers.

Add cg_pg_lock to make elpg_enabled, elcg_enabled, blcg_enabled
and slcg_enabled thread safe.

JIRA NVGPU-2014

Change-Id: I00d124c2ee16242c9a3ef82e7620fbb7f1297aff
Signed-off-by: Seema Khowala <seemaj@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2025493
Signed-off-by: Debarshi Dutta <ddutta@nvidia.com>
(cherry-picked from c905858565 in
dev-kernel)
Reviewed-on: https://git-master.nvidia.com/r/2108406
GVS: Gerrit_Virtual_Submit
Reviewed-by: Bibek Basu <bbasu@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Debarshi Dutta
2019-04-30 13:54:08 +05:30
committed by mobile promotions
parent f495f52c70
commit c81cc032c4
24 changed files with 984 additions and 354 deletions
Download Patch File Download Diff File Expand all files Collapse all files

106
drivers/gpu/nvgpu/common/power_features/pg/pg.c Normal file
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/*
* 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;
}
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;
}
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;
}
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;
}