gpu: nvgpu: cyclestats snapshot permissions rework

Cyclestats snapshot feature is expected for new devices.
The detection code was isolated in separate function and run-time
check added to validate/allow ioctl calls on the current GPU.

Bug 1674079

Change-Id: Icc2f1e5cc50d39b395d31d5292c314f99d67f3eb
Signed-off-by: Leonid Moiseichuk <lmoiseichuk@nvidia.com>
Reviewed-on: http://git-master/r/781697
(cherry picked from commit bdd23136b182c933841f91dd2829061e278a46d4)
Reviewed-on: http://git-master/r/793630
Reviewed-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/gk20a.h b/drivers/gpu/nvgpu/gk20a/gk20a.h
index ed209929..d48b94aa 100644
--- a/drivers/gpu/nvgpu/gk20a/gk20a.h
+++ b/drivers/gpu/nvgpu/gk20a/gk20a.h
@@ -179,6 +179,7 @@ struct gpu_ops {
                 void (*init_sm_dsm_reg_info)(void);
                 int (*wait_empty)(struct gk20a *g, unsigned long end_jiffies,
                        u32 expect_delay);
+                void (*init_cyclestats)(struct gk20a *g);
         } gr;
         const char *name;
         struct {