gpu: nvgpu: abstract submit profiling

Add gk20a_fifo_profile_snapshot() to store the submit time in a
profiling entry that was acquired from gk20a_fifo_profile_acquire().
Also get rid of ifdef CONFIG_DEBUG_FS by stubbing the acquire and free
functions when debugfs is not enabled. This reduces some cyclomatic
complexity in the submit path.

Jira NVGPU-708

Change-Id: I39829a6475cfe3aa582620219e420bde62228e52
Signed-off-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1729545
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 15 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/fifo_gk20a.h b/drivers/gpu/nvgpu/gk20a/fifo_gk20a.h
index cf3ac167..bccd15f6 100644
--- a/drivers/gpu/nvgpu/gk20a/fifo_gk20a.h
+++ b/drivers/gpu/nvgpu/gk20a/fifo_gk20a.h
@@ -349,6 +349,21 @@ bool gk20a_is_fault_engine_subid_gpc(struct gk20a *g, u32 engine_subid);
 struct fifo_profile_gk20a *gk20a_fifo_profile_acquire(struct gk20a *g);
 void gk20a_fifo_profile_release(struct gk20a *g,
         struct fifo_profile_gk20a *profile);
+void gk20a_fifo_profile_snapshot(struct fifo_profile_gk20a *profile, int idx);
+#else
+static inline struct fifo_profile_gk20a *
+gk20a_fifo_profile_acquire(struct gk20a *g)
+{
+        return NULL;
+}
+static inline void gk20a_fifo_profile_release(struct gk20a *g,
+        struct fifo_profile_gk20a *profile)
+{
+}
+static inline void gk20a_fifo_profile_snapshot(
+                struct fifo_profile_gk20a *profile, int idx)
+{
+}
 #endif
 
 void gk20a_dump_channel_status_ramfc(struct gk20a *g,