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, 13 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gm20b/gr_gm20b.c b/drivers/gpu/nvgpu/gm20b/gr_gm20b.c
index 6c7831d5..17b4b8ea 100644
--- a/drivers/gpu/nvgpu/gm20b/gr_gm20b.c
+++ b/drivers/gpu/nvgpu/gm20b/gr_gm20b.c
@@ -1040,6 +1040,18 @@ static u32 gr_gm20b_get_max_fbps_count(struct gk20a *g)
         return max_fbps_count;
 }
 
+static void gr_gm20b_init_cyclestats(struct gk20a *g)
+{
+#if defined(CONFIG_GK20A_CYCLE_STATS)
+        g->gpu_characteristics.flags |=
+                NVGPU_GPU_FLAGS_SUPPORT_CYCLE_STATS;
+        g->gpu_characteristics.flags |=
+                NVGPU_GPU_FLAGS_SUPPORT_CYCLE_STATS_SNAPSHOT;
+#else
+        (void)g;
+#endif
+}
+
 void gm20b_init_gr(struct gpu_ops *gops)
 {
         gops->gr.init_gpc_mmu = gr_gm20b_init_gpc_mmu;
@@ -1094,4 +1106,5 @@ void gm20b_init_gr(struct gpu_ops *gops)
         gops->gr.get_max_fbps_count = gr_gm20b_get_max_fbps_count;
         gops->gr.init_sm_dsm_reg_info = gr_gm20b_init_sm_dsm_reg_info;
         gops->gr.wait_empty = gr_gk20a_wait_idle;
+        gops->gr.init_cyclestats = gr_gm20b_init_cyclestats;
 }