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, 11 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/gr_gk20a.c b/drivers/gpu/nvgpu/gk20a/gr_gk20a.c
index c36f2551..512a7d6b 100644
--- a/drivers/gpu/nvgpu/gk20a/gr_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/gr_gk20a.c
@@ -7333,6 +7333,16 @@ int gr_gk20a_debugfs_init(struct gk20a *g)
         return 0;
 }
 
+static void gr_gk20a_init_cyclestats(struct gk20a *g)
+{
+#if defined(CONFIG_GK20A_CYCLE_STATS)
+        g->gpu_characteristics.flags |=
+                NVGPU_GPU_FLAGS_SUPPORT_CYCLE_STATS;
+#else
+        (void)g;
+#endif
+}
+
 void gk20a_init_gr_ops(struct gpu_ops *gops)
 {
         gops->gr.access_smpc_reg = gr_gk20a_access_smpc_reg;
@@ -7383,4 +7393,5 @@ void gk20a_init_gr_ops(struct gpu_ops *gops)
         gops->gr.get_rop_l2_en_mask = gr_gk20a_rop_l2_en_mask;
         gops->gr.init_sm_dsm_reg_info = gr_gk20a_init_sm_dsm_reg_info;
         gops->gr.wait_empty = gr_gk20a_wait_idle;
+        gops->gr.init_cyclestats = gr_gk20a_init_cyclestats;
 }