gpu: nvgpu: create timed wait functions for stall and nonstall interrupts completion

In order to process stalling interrupts during TSG unbind, we need a API
to wait for the stalling interrupts to complete within certain duration.

Prepare these APIs for stalling and non-stalling interrupts.

Bug 200711183
Bug 200726848

Change-Id: I634738249ade64224326b356d6244ad4299f1baf
Signed-off-by: Sagar Kamble <skamble@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2521970
(cherry picked from commit I0b7a64c0f3761bbd0ca0843aea28a591ed23739f)
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2523937
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-by: Bibek Basu <bbasu@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
GVS: Gerrit_Virtual_Submit

1 files changed, 17 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/os/posix/nvgpu.c b/drivers/gpu/nvgpu/os/posix/nvgpu.c
index e485ed73..5b68113c 100644
--- a/drivers/gpu/nvgpu/os/posix/nvgpu.c
+++ b/drivers/gpu/nvgpu/os/posix/nvgpu.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018, NVIDIA CORPORATION.  All rights reserved.
+ * Copyright (c) 2018-2021, NVIDIA CORPORATION.  All rights reserved.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Software"),
@@ -36,6 +36,22 @@
 
 #include "os_posix.h"
 
+int nvgpu_wait_for_stall_interrupts(struct gk20a *g, u32 timeout)
+{
+        /*
+         * No interrupts in userspace so nothing to wait for.
+         */
+        return 0;
+}
+
+int nvgpu_wait_for_nonstall_interrupts(struct gk20a *g, u32 timeout)
+{
+        /*
+         * No interrupts in userspace so nothing to wait for.
+         */
+        return 0;
+}
+
 void nvgpu_wait_for_deferred_interrupts(struct gk20a *g)
 {
         /*