+u64 nvkm_timer_read(struct nvkm_timer *);
+void nvkm_timer_alarm(struct nvkm_timer *, u32 nsec, struct nvkm_alarm *);
+void nvkm_timer_alarm_cancel(struct nvkm_timer *, struct nvkm_alarm *);
+
+/* 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.
+ *
+ * NVKM_DELAY can be passed for 'cond' to disable the timeout warning,
+ * which is useful for unconditional delay loops.
+ */
+#define NVKM_DELAY _warn = false;
+#define nvkm_nsec(d,n,cond...) ({ \
+ struct nvkm_device *_device = (d); \
+ struct nvkm_timer *_tmr = _device->timer; \
+ u64 _nsecs = (n), _time0 = nvkm_timer_read(_tmr); \
+ s64 _taken = 0; \
+ bool _warn = true; \
+ \
+ do { \
+ cond \
+ } while (_taken = nvkm_timer_read(_tmr) - _time0, _taken < _nsecs); \
+ \
+ if (_taken >= _nsecs) { \
+ if (_warn) { \
+ dev_warn(_device->dev, "timeout at %s:%d/%s()!\n", \
+ __FILE__, __LINE__, __func__); \
+ } \
+ _taken = -ETIMEDOUT; \
+ } \
+ _taken; \
+})
+#define nvkm_usec(d,u,cond...) nvkm_nsec((d), (u) * 1000, ##cond)
+#define nvkm_msec(d,m,cond...) nvkm_usec((d), (m) * 1000, ##cond)
+
+#define nvkm_wait_nsec(d,n,addr,mask,data) \
+ nvkm_nsec(d, n, \
+ if ((nvkm_rd32(d, (addr)) & (mask)) == (data)) \
+ break; \
+ )
+#define nvkm_wait_usec(d,u,addr,mask,data) \
+ nvkm_wait_nsec((d), (u) * 1000, (addr), (mask), (data))
+#define nvkm_wait_msec(d,m,addr,mask,data) \
+ nvkm_wait_usec((d), (m) * 1000, (addr), (mask), (data))