1 #ifndef __NVIF_TIMER_H__
2 #define __NVIF_TIMER_H__
3 #include <nvif/os.h>
4 
5 struct nvif_timer_wait {
6 	struct nvif_device *device;
7 	u64 limit;
8 	u64 time0;
9 	u64 time1;
10 	int reads;
11 };
12 
13 void nvif_timer_wait_init(struct nvif_device *, u64 nsec,
14 			  struct nvif_timer_wait *);
15 s64 nvif_timer_wait_test(struct nvif_timer_wait *);
16 
17 /* Delay based on GPU time (ie. PTIMER).
18  *
19  * Will return -ETIMEDOUT unless the loop was terminated with 'break',
20  * where it will return the number of nanoseconds taken instead.
21  */
22 #define nvif_nsec(d,n,cond...) ({                                              \
23 	struct nvif_timer_wait _wait;                                          \
24 	s64 _taken = 0;                                                        \
25                                                                                \
26 	nvif_timer_wait_init((d), (n), &_wait);                                \
27 	do {                                                                   \
28 		cond                                                           \
29 	} while ((_taken = nvif_timer_wait_test(&_wait)) >= 0);                \
30                                                                                \
31 	_taken;                                                                \
32 })
33 #define nvif_usec(d,u,cond...) nvif_nsec((d), (u) * 1000, ##cond)
34 #define nvif_msec(d,m,cond...) nvif_usec((d), (m) * 1000, ##cond)
35 #endif
36