gpu: nvgpu: Implement abstraction for finding TID

Implement abstraction for finding the thread ID of thread currently
being run. This is tracked for context switch tracing.

In Linux kernel this is implemented by returning PID.

Change-Id: Id46a318894f9a2ff3c85d2c8ef0b02c52783f122
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1627239
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/include/nvgpu/os_sched.h b/drivers/gpu/nvgpu/include/nvgpu/os_sched.h
index 61cee4ad..97dc9a57 100644
--- a/drivers/gpu/nvgpu/include/nvgpu/os_sched.h
+++ b/drivers/gpu/nvgpu/include/nvgpu/os_sched.h
@@ -26,6 +26,12 @@
 struct gk20a;
 
 /**
+ * nvgpu_current_tid - Query the id of current thread
+ *
+ */
+int nvgpu_current_tid(struct gk20a *g);
+
+/**
  * nvgpu_current_pid - Query the id of current process
  *
  */