gpu: nvgpu: memory unlock HAL support

- Created "mem_unlock" HAL under fb to support memory
  unlock
- Called as part of gk20a_finalize_poweron() if memory unlock
  support needed by checking HAL
- Assigned "mem_unlock" HAL to NULL for chips which don't
  need memory unlocks.

Change-Id: I68d0910f15d293feaacfcbf6bd17ecccd3b5219d
Signed-off-by: Mahantesh Kumbar <mkumbar@nvidia.com>
(cherry picked from commit 586894eb84860bbbe4c75dae4715bdf27432a480)
Reviewed-on: https://git-master.nvidia.com/r/1564703
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/gk20a.h b/drivers/gpu/nvgpu/gk20a/gk20a.h
index 3fcad1cf..c04c97ca 100644
--- a/drivers/gpu/nvgpu/gk20a/gk20a.h
+++ b/drivers/gpu/nvgpu/gk20a/gk20a.h
@@ -445,6 +445,7 @@ struct gpu_ops {
                 void (*set_debug_mode)(struct gk20a *g, bool enable);
                 void (*tlb_invalidate)(struct gk20a *g, struct nvgpu_mem *pdb);
                 void (*hub_isr)(struct gk20a *g);
+                int (*mem_unlock)(struct gk20a *g);
         } fb;
         struct {
                 void (*slcg_bus_load_gating_prod)(struct gk20a *g, bool prod);