1#ifndef __NVIF_TIMER_H__
2#define __NVIF_TIMER_H__
3#include <nvif/os.h>
4
5struct nvif_timer_wait {
6	struct nvif_device *device;
7	u64 limit;
8	u64 time0;
9	u64 time1;
10	int reads;
11};
12
13void nvif_timer_wait_init(struct nvif_device *, u64 nsec,
14			  struct nvif_timer_wait *);
15s64 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