gpu: nvgpu: IOCTL to disable timeouts

Add IOCTL NVGPU_DBG_GPU_IOCTL_TIMEOUT to support
disabling/re-enabling scheduler timeout from user space

If user space application is closed without re-enabling
the timeouts, kernel will restore the timeouts' state
while releasing the debug session

This is needed for debugging purpose

Bug 1514061

Change-Id: I32efb47ad09d793f3e7fd8f0aaa9720c8bc91272
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: http://git-master/r/788176
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 13 insertions, 1 deletions

diff --git a/include/uapi/linux/nvgpu.h b/include/uapi/linux/nvgpu.h
index 6fdf4025..f55346db 100644
--- a/include/uapi/linux/nvgpu.h
+++ b/include/uapi/linux/nvgpu.h
@@ -547,8 +547,20 @@ struct nvgpu_dbg_gpu_pc_sampling_args {
 #define NVGPU_DBG_GPU_IOCTL_PC_SAMPLING \
         _IOW(NVGPU_DBG_GPU_IOCTL_MAGIC,  9, struct nvgpu_dbg_gpu_pc_sampling_args)
 
+/* Enable/Disable timeouts */
+#define NVGPU_DBG_GPU_IOCTL_TIMEOUT_ENABLE                                   1
+#define NVGPU_DBG_GPU_IOCTL_TIMEOUT_DISABLE                                  0
+
+struct nvgpu_dbg_gpu_timeout_args {
+        __u32 enable;
+        __u32 padding;
+};
+
+#define NVGPU_DBG_GPU_IOCTL_TIMEOUT \
+        _IOW(NVGPU_DBG_GPU_IOCTL_MAGIC, 10, struct nvgpu_dbg_gpu_timeout_args)
+
 #define NVGPU_DBG_GPU_IOCTL_LAST                \
-        _IOC_NR(NVGPU_DBG_GPU_IOCTL_PC_SAMPLING)
+        _IOC_NR(NVGPU_DBG_GPU_IOCTL_TIMEOUT)
 #define NVGPU_DBG_GPU_IOCTL_MAX_ARG_SIZE                \
         sizeof(struct nvgpu_dbg_gpu_perfbuf_map_args)