gpu: nvgpu: add cg and pg function

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 c90585856567a547173a8b207365b3a4a3ccdd57 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>

1 files changed, 4 insertions, 8 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/ce2_gk20a.c b/drivers/gpu/nvgpu/gk20a/ce2_gk20a.c
index 6df8f6e4..5052fc35 100644
--- a/drivers/gpu/nvgpu/gk20a/ce2_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/ce2_gk20a.c
@@ -30,6 +30,7 @@
 #include <nvgpu/io.h>
 #include <nvgpu/utils.h>
 #include <nvgpu/channel.h>
+#include <nvgpu/power_features/cg.h>
 
 #include "gk20a.h"
 #include "gk20a/fence_gk20a.h"
@@ -339,14 +340,9 @@ int gk20a_init_ce_support(struct gk20a *g)
 
         g->ops.mc.reset(g, ce_reset_mask);
 
-        if (g->ops.clock_gating.slcg_ce2_load_gating_prod) {
-                g->ops.clock_gating.slcg_ce2_load_gating_prod(g,
-                                g->slcg_enabled);
-        }
-        if (g->ops.clock_gating.blcg_ce_load_gating_prod) {
-                g->ops.clock_gating.blcg_ce_load_gating_prod(g,
-                                g->blcg_enabled);
-        }
+        nvgpu_cg_slcg_ce2_load_enable(g);
+
+        nvgpu_cg_blcg_ce_load_enable(g);
 
         if (ce_app->initialised) {
                 /* assume this happen during poweron/poweroff GPU sequence */