gpu: nvgpu: Falcon controller halt interrupt status clear

- Added nvgpu_flcn_clear_halt_intr_status() to
Wait for halt interrupt status clear by
clear_halt_interrupt_status() HAL within timeout

- Added gk20a_flcn_clear_halt_interrupt_status()
to clear falcon controller halt interrupt status

- Replaced flacon halt interrupt clear with
nvgpu_flcn_clear_halt_intr_status() method

NVGPU JIRA-99

Change-Id: I762a3c01cd1d02028eb6aaa9898a50be94376619
Signed-off-by: Mahantesh Kumbar <mkumbar@nvidia.com>
Reviewed-on: https://git-master/r/1511333
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/include/nvgpu/falcon.h b/drivers/gpu/nvgpu/include/nvgpu/falcon.h
index 3079c79e..ca61ae46 100644
--- a/drivers/gpu/nvgpu/include/nvgpu/falcon.h
+++ b/drivers/gpu/nvgpu/include/nvgpu/falcon.h
@@ -129,6 +129,7 @@ struct nvgpu_falcon_engine_dependency_ops {
 struct nvgpu_falcon_ops {
         int (*reset)(struct nvgpu_falcon *flcn);
         void (*set_irq)(struct nvgpu_falcon *flcn, bool enable);
+        bool (*clear_halt_interrupt_status)(struct nvgpu_falcon *flcn);
         bool (*is_falcon_cpu_halted)(struct nvgpu_falcon *flcn);
         bool (*is_falcon_idle)(struct nvgpu_falcon *flcn);
         bool (*is_falcon_scrubbing_done)(struct nvgpu_falcon *flcn);
@@ -167,6 +168,8 @@ struct nvgpu_falcon {
 
 int nvgpu_flcn_wait_idle(struct nvgpu_falcon *flcn);
 int nvgpu_flcn_wait_for_halt(struct nvgpu_falcon *flcn, unsigned int timeout);
+int nvgpu_flcn_clear_halt_intr_status(struct nvgpu_falcon *flcn,
+                unsigned int timeout);
 int nvgpu_flcn_reset(struct nvgpu_falcon *flcn);
 void nvgpu_flcn_set_irq(struct nvgpu_falcon *flcn, bool enable,
         u32 intr_mask, u32 intr_dest);