36 lines · c
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#endif36