gpu: nvgpu: add characteristics flag to support IO coherence

Add a flag NVGPU_GPU_FLAGS_SUPPORT_IO_COHERENCE to nvgpu_gpu_characteristics
to indicate if IO coherence support is enabled on platform or not

Jira GPUT19X-17
Bug 1651331
Bug 200283998

Change-Id: Iba8fa797d6786bbc770ac45a3e39322f87be6e3f
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: https://git-master/r/1512599
GVS: Gerrit_Virtual_Submit
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/uapi/linux/nvgpu.h b/include/uapi/linux/nvgpu.h
index c34a7e83..22687eb5 100644
--- a/include/uapi/linux/nvgpu.h
+++ b/include/uapi/linux/nvgpu.h
@@ -142,6 +142,8 @@ struct nvgpu_gpu_zbc_query_table_args {
 #define NVGPU_GPU_FLAGS_SUPPORT_DETERMINISTIC_SUBMIT_NO_JOBTRACKING (1ULL << 18)
 /* Deterministic submits are supported even with job tracking */
 #define NVGPU_GPU_FLAGS_SUPPORT_DETERMINISTIC_SUBMIT_FULL (1ULL << 19)
+/* IO coherence support is available */
+#define NVGPU_GPU_FLAGS_SUPPORT_IO_COHERENCE            (1ULL << 20)
 
 struct nvgpu_gpu_characteristics {
         __u32 arch;