gpu: nvgpu: APIs to dump GR status

Add below APIs to dump various GR status registers

1. debugfs : /d/gpu.0/gr_status
Read this debugfs at runtime to get status registers

2. API gk20a_gr_debug_dump()
Add this API in code to dump registers at any point

Bug 200062436

Change-Id: Ic1115b5a2fc16362954b5ed8a9e70afb872a8d91
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: http://git-master/r/486465
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/gk20a.h b/drivers/gpu/nvgpu/gk20a/gk20a.h
index 4fbc25be..0e06e7de 100644
--- a/drivers/gpu/nvgpu/gk20a/gk20a.h
+++ b/drivers/gpu/nvgpu/gk20a/gk20a.h
@@ -159,6 +159,8 @@ struct gpu_ops {
                 void (*update_ctxsw_preemption_mode)(struct gk20a *g,
                                 struct channel_ctx_gk20a *ch_ctx,
                                 void *ctx_ptr);
+                int (*dump_gr_regs)(struct gk20a *g,
+                                struct gk20a_debug_output *o);
         } gr;
         const char *name;
         struct {