gpu: nvgpu: tpc powergating through sysfs

- adds static tpc-powergating through sysfs.
- active tpc count will remain till the GPU/systems is not booted again.
- tpc_pg_mask can be written only after GPU probe finishes and
  GPU boot is triggered.

Note:
To be able to use this feature, we need to change boot/init
scripts of the OS(used with nvgpu driver) to write to sysfs nodes before
posting discover image size query to FECS.

Bug 200406784

Change-Id: Id749c7a617422c625f77d0c1a9aada2eb960c4d0
Signed-off-by: Deepak Goyal <dgoyal@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1742422
Reviewed-by: svc-misra-checker <svc-misra-checker@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gv11b/hal_gv11b.c b/drivers/gpu/nvgpu/gv11b/hal_gv11b.c
index d479fef8..08c3097e 100644
--- a/drivers/gpu/nvgpu/gv11b/hal_gv11b.c
+++ b/drivers/gpu/nvgpu/gv11b/hal_gv11b.c
@@ -294,6 +294,7 @@ static const struct gpu_ops gv11b_ops = {
                 .init_ctx_state = gr_gp10b_init_ctx_state,
                 .alloc_gr_ctx = gr_gp10b_alloc_gr_ctx,
                 .free_gr_ctx = gr_gk20a_free_gr_ctx,
+                .powergate_tpc = gr_gv11b_powergate_tpc,
                 .update_ctxsw_preemption_mode =
                         gr_gv11b_update_ctxsw_preemption_mode,
                 .dump_gr_regs = gr_gv11b_dump_gr_status_regs,