gpu: nvgpu: Add uapi support for NVGPU_GPU_IOCTL_GET_ENGINE_INFO

Implement NVGPU_GPU_IOCTL_GET_ENGINE_INFO for retrieving the
list of supported engines and their corresponding run list id:s.

JIRA DNVGPU-25

Change-Id: I8703388660190f7dcb509c0676f283ca4b820b6f
Signed-off-by: Lakshmanan M <lm@nvidia.com>
Reviewed-on: http://git-master/r/1160939
Reviewed-by: Sami Kiminki <skiminki@nvidia.com>
Reviewed-by: Konsta Holtta <kholtta@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Alex Waterman <alexw@nvidia.com>
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 31 insertions, 1 deletions

diff --git a/include/uapi/linux/nvgpu.h b/include/uapi/linux/nvgpu.h
index 03173339..9d649536 100644
--- a/include/uapi/linux/nvgpu.h
+++ b/include/uapi/linux/nvgpu.h
@@ -394,6 +394,33 @@ struct nvgpu_gpu_get_gpu_time_args {
         __u64 reserved;
 };
 
+struct nvgpu_gpu_get_engine_info_item {
+
+#define NVGPU_GPU_ENGINE_ID_GR 0
+#define NVGPU_GPU_ENGINE_ID_GR_COPY 1
+#define NVGPU_GPU_ENGINE_ID_ASYNC_COPY 2
+        __u32 engine_id;
+
+        __u32 engine_instance;
+
+        /* runlist id for opening channels to the engine, or -1 if
+         * channels are not supported */
+        __s32 runlist_id;
+
+        __u32 reserved;
+};
+
+struct nvgpu_gpu_get_engine_info_args {
+        /* [in]  Buffer size reserved by userspace.
+         *
+         * [out] Full kernel buffer size. Multiple of sizeof(struct
+         *       nvgpu_gpu_get_engine_info_item)
+        */
+        __u32 engine_info_buf_size;
+        __u32 reserved;
+        __u64 engine_info_buf_addr;
+};
+
 #define NVGPU_GPU_IOCTL_ZCULL_GET_CTX_SIZE \
         _IOR(NVGPU_GPU_IOCTL_MAGIC, 1, struct nvgpu_gpu_zcull_get_ctx_size_args)
 #define NVGPU_GPU_IOCTL_ZCULL_GET_INFO \
@@ -446,8 +473,11 @@ struct nvgpu_gpu_get_gpu_time_args {
 #define NVGPU_GPU_IOCTL_GET_GPU_TIME \
         _IOWR(NVGPU_GPU_IOCTL_MAGIC, 25, \
                         struct nvgpu_gpu_get_gpu_time_args)
+#define NVGPU_GPU_IOCTL_GET_ENGINE_INFO \
+        _IOWR(NVGPU_GPU_IOCTL_MAGIC, 26, \
+                        struct nvgpu_gpu_get_engine_info_args)
 #define NVGPU_GPU_IOCTL_LAST            \
-        _IOC_NR(NVGPU_GPU_IOCTL_GET_GPU_TIME)
+        _IOC_NR(NVGPU_GPU_IOCTL_GET_ENGINE_INFO)
 #define NVGPU_GPU_IOCTL_MAX_ARG_SIZE    \
         sizeof(struct nvgpu_gpu_get_cpu_time_correlation_info_args)