libhsakmt: Add support for hsaKmtAvailableMemory

New API function to report available memory per GPU

Signed-off-by: Daniel Phillips <Daniel.Phillips@amd.com>
Change-Id: I63c1e4ca0020c657977ab3635947ab0ed0a81440

include/linux/kfd_ioctl.h

@@ -34,9 +34,10 @@
  * - 1.6 - Query clear flags in SVM get_attr API
  * - 1.7 - Checkpoint Restore (CRIU) API
  * - 1.8 - CRIU - Support for SDMA transfers with GTT BOs
+ * - 1.9 - Add available_memory ioctl
  */
 #define KFD_IOCTL_MAJOR_VERSION 1
-#define KFD_IOCTL_MINOR_VERSION 8
+#define KFD_IOCTL_MINOR_VERSION 9
 
 /*
  * Debug revision change log
@@ -769,6 +770,16 @@ struct kfd_ioctl_free_memory_of_gpu_args {
 	__u64 handle;		/* to KFD */
 };
 
+/* Inquire available memory with kfd_ioctl_get_available_memory
+ *
+ * @available: memory available for alloc
+ */
+struct  kfd_ioctl_get_available_memory_args {
+	__u64 available;	/* from KFD */
+	__u32 gpu_id;		/* to KFD */
+	__u32 pad;
+};
+
 /* Map memory to one or more GPUs
  *
  * @handle:                memory handle returned by alloc
@@ -1327,8 +1338,11 @@ struct kfd_ioctl_set_xnack_mode_args {
 #define AMDKFD_IOC_CRIU_OP			\
 		AMDKFD_IOWR(0x22, struct kfd_ioctl_criu_args)
 
+#define AMDKFD_IOC_AVAILABLE_MEMORY            \
+		AMDKFD_IOWR(0x23, struct kfd_ioctl_get_available_memory_args)
+
 #define AMDKFD_COMMAND_START		0x01
-#define AMDKFD_COMMAND_END		0x23
+#define AMDKFD_COMMAND_END		0x24
 
 /* non-upstream ioctls */
 #define AMDKFD_IOC_IPC_IMPORT_HANDLE                                    \