gpu: nvgpu: add clocks control capability

Add NVGPU_GPU_FLAGS_SUPPORT_CLOCK_CONTROLS bit to allow user library
to determine if GPU supports clock control ioctls.

Jira DNVGPU-125

Change-Id: Ia09808ed36aa85a7c520039bb336888e2b467076
Signed-off-by: David Martine Nieto <dmartineznie@nvidia.com>
Reviewed-on: http://git-master/r/1239379
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: http://git-master/r/1267154
Reviewed-by: Automatic_Commit_Validation_User

1 files changed, 12 insertions, 2 deletions

diff --git a/include/uapi/linux/nvgpu.h b/include/uapi/linux/nvgpu.h
index 49e3fc5c..13492e0d 100644
--- a/include/uapi/linux/nvgpu.h
+++ b/include/uapi/linux/nvgpu.h
@@ -116,6 +116,16 @@ struct nvgpu_gpu_zbc_query_table_args {
 #define NVGPU_GPU_FLAGS_SUPPORT_USERSPACE_MANAGED_AS    (1ULL << 7)
 /* Both gpu driver and device support TSG */
 #define NVGPU_GPU_FLAGS_SUPPORT_TSG                     (1ULL << 8)
+/* Clock control support */
+#define NVGPU_GPU_FLAGS_SUPPORT_CLOCK_CONTROLS          (1ULL << 9)
+/* NVGPU_GPU_IOCTL_GET_VOLTAGE is available */
+#define NVGPU_GPU_FLAGS_SUPPORT_GET_VOLTAGE             (1ULL << 10)
+/* NVGPU_GPU_IOCTL_GET_CURRENT is available */
+#define NVGPU_GPU_FLAGS_SUPPORT_GET_CURRENT             (1ULL << 11)
+/* NVGPU_GPU_IOCTL_GET_POWER is available */
+#define NVGPU_GPU_FLAGS_SUPPORT_GET_POWER               (1ULL << 12)
+/* NVGPU_GPU_IOCTL_GET_TEMPERATURE is available */
+#define NVGPU_GPU_FLAGS_SUPPORT_GET_TEMPERATURE         (1ULL << 13)
 
 struct nvgpu_gpu_characteristics {
         __u32 arch;
@@ -671,7 +681,7 @@ struct nvgpu_gpu_clk_set_info_args {
            this file descriptor to determine when the request has completed.
            The fd must be closed afterwards.
          */
-        int completion_fd;
+        __s32 completion_fd;
 };
 
 struct nvgpu_gpu_clk_get_event_fd_args {
@@ -680,7 +690,7 @@ struct nvgpu_gpu_clk_get_event_fd_args {
         __u32 flags;
 
         /* out: File descriptor for events, i.e. any clock update. */
-        int event_fd;
+        __s32 event_fd;
 };
 
 struct nvgpu_gpu_get_memory_state_args {