gpu: nvgpu: debugfs code to dump HAL functions

Prints addresses of device-specific HAL functions to debugfs file
hal/gops.

The list of functions is produced by dumping the contents of the
gpu_ops substruct of the gk20a struct. This interface makes the
assumption that there are only function pointers in gpu_ops.

Companion Python script nvgpu_debug_hal.py analyzes gk20a.h to
determine operation counts and prettyify debugfs interface's
output.

Jira NVGPU-107

Change-Id: I0910e86638d144979e8630bbc5b330bccfd3ad94
Signed-off-by: Sunny He <suhe@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1542990
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/gk20a.h b/drivers/gpu/nvgpu/gk20a/gk20a.h
index 15e81291..121dd962 100644
--- a/drivers/gpu/nvgpu/gk20a/gk20a.h
+++ b/drivers/gpu/nvgpu/gk20a/gk20a.h
@@ -130,6 +130,11 @@ enum gk20a_cbc_op {
 
 enum nvgpu_unit;
 
+/*
+ * gpu_ops should only contain function pointers! Non-function pointer members
+ * should go in struct gk20a or be implemented with the boolean flag API defined
+ * in nvgpu/enabled.h
+ */
 struct gpu_ops {
         struct {
                 int (*determine_L2_size_bytes)(struct gk20a *gk20a);