include/nvif/timer.h

0001 #ifndef __NVIF_TIMER_H__
0002 #define __NVIF_TIMER_H__
0003 #include <nvif/os.h>
0004
0005 struct nvif_timer_wait {
0006     struct nvif_device *device;
0007     u64 limit;
0008     u64 time0;
0009     u64 time1;
0010     int reads;
0011 };
0012
0013 void nvif_timer_wait_init(struct nvif_device *, u64 nsec,
0014               struct nvif_timer_wait *);
0015 s64 nvif_timer_wait_test(struct nvif_timer_wait *);
0016
0017 /* Delay based on GPU time (ie. PTIMER).
0018  *
0019  * Will return -ETIMEDOUT unless the loop was terminated with 'break',
0020  * where it will return the number of nanoseconds taken instead.
0021  */
0022 #define nvif_nsec(d,n,cond...) ({                                              \
0023     struct nvif_timer_wait _wait;                                          \
0024     s64 _taken = 0;                                                        \
0025                                                                                \
0026     nvif_timer_wait_init((d), (n), &_wait);                                \
0027     do {                                                                   \
0028         cond                                                           \
0029     } while ((_taken = nvif_timer_wait_test(&_wait)) >= 0);                \
0030                                                                                \
0031     _taken;                                                                \
0032 })
0033 #define nvif_usec(d,u,cond...) nvif_nsec((d), (u) * 1000, ##cond)
0034 #define nvif_msec(d,m,cond...) nvif_usec((d), (m) * 1000, ##cond)
0035 #endif