gpu: nvgpu: IOCTL to suspend/resume context

Add below IOCTL to suspend/resume a context
NVGPU_DBG_GPU_IOCTL_SUSPEND_RESUME_CONTEXTS:

Suspend sequence :
- disable ctxsw
- loop through list of channels
- if channel is ctx resident, suspend all SMs
- otherwise, disable channel/TSG
- enable ctxsw

Resume sequence :
- disable ctxsw
- loop through list of channels
- if channel is ctx resident, resume all SMs
- otherwise, enable channel/TSG
- enable ctxsw

Bug 200156699

Change-Id: Iacf1bf7877b67ddf87cc6891c37c758a4644b014
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: http://git-master/r/1120332
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gm20b/gr_gm20b.c b/drivers/gpu/nvgpu/gm20b/gr_gm20b.c
index 204a90f3..9d269365 100644
--- a/drivers/gpu/nvgpu/gm20b/gr_gm20b.c
+++ b/drivers/gpu/nvgpu/gm20b/gr_gm20b.c
@@ -1397,4 +1397,5 @@ void gm20b_init_gr(struct gpu_ops *gops)
         gops->gr.record_sm_error_state = gm20b_gr_record_sm_error_state;
         gops->gr.update_sm_error_state = gm20b_gr_update_sm_error_state;
         gops->gr.clear_sm_error_state = gm20b_gr_clear_sm_error_state;
+        gops->gr.suspend_contexts = gr_gk20a_suspend_contexts;
 }