-int nvif_device_new(struct nvif_object *, u32 handle, u32 oclass,
- void *, u32, struct nvif_device **);
-void nvif_device_ref(struct nvif_device *, struct nvif_device **);
+u64 nvif_device_time(struct nvif_device *);
+
+/* Delay based on GPU time (ie. PTIMER).
+ *
+ * Will return -ETIMEDOUT unless the loop was terminated with 'break',
+ * where it will return the number of nanoseconds taken instead.
+ */
+#define nvif_nsec(d,n,cond...) ({ \
+ struct nvif_device *_device = (d); \
+ u64 _nsecs = (n), _time0 = nvif_device_time(_device); \
+ s64 _taken = 0; \
+ \
+ do { \
+ cond \
+ } while (_taken = nvif_device_time(_device) - _time0, _taken < _nsecs);\
+ \
+ if (_taken >= _nsecs) \
+ _taken = -ETIMEDOUT; \
+ _taken; \
+})
+#define nvif_usec(d,u,cond...) nvif_nsec((d), (u) * 1000, ##cond)
+#define nvif_msec(d,m,cond...) nvif_usec((d), (m) * 1000, ##cond)