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, 8 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/gk20a.h b/drivers/gpu/nvgpu/gk20a/gk20a.h
index 948d8e60..4934958c 100644
--- a/drivers/gpu/nvgpu/gk20a/gk20a.h
+++ b/drivers/gpu/nvgpu/gk20a/gk20a.h
@@ -307,6 +307,7 @@ struct gpu_ops {
                           u32 class, u32 padding);
                 void (*free_gr_ctx)(struct gk20a *g,
                                     struct vm_gk20a *vm, struct nvgpu_gr_ctx *gr_ctx);
+                void (*powergate_tpc)(struct gk20a *g);
                 void (*update_ctxsw_preemption_mode)(struct gk20a *g,
                                 struct channel_gk20a *c,
                                 struct nvgpu_mem *mem);
@@ -1361,6 +1362,8 @@ struct gk20a {
         u64 log_mask;
         u32 log_trace;
 
+        struct nvgpu_mutex tpc_pg_lock;
+
         struct nvgpu_gpu_params params;
 
         /*
@@ -1532,6 +1535,11 @@ struct gk20a {
 
         u32 tpc_fs_mask_user;
 
+        u32 tpc_pg_mask;
+        bool can_tpc_powergate;
+
+        u32 valid_tpc_mask;
+
         struct nvgpu_bios bios;
         bool bios_is_init;