1 #ifndef __NVKM_TIMER_H__ 2 #define __NVKM_TIMER_H__ 3 #include <core/subdev.h> 4 5 struct nvkm_alarm { 6 struct list_head head; 7 u64 timestamp; 8 void (*func)(struct nvkm_alarm *); 9 }; 10 11 static inline void 12 nvkm_alarm_init(struct nvkm_alarm *alarm, void (*func)(struct nvkm_alarm *)) 13 { 14 INIT_LIST_HEAD(&alarm->head); 15 alarm->func = func; 16 } 17 18 struct nvkm_timer { 19 const struct nvkm_timer_func *func; 20 struct nvkm_subdev subdev; 21 22 struct list_head alarms; 23 spinlock_t lock; 24 }; 25 26 u64 nvkm_timer_read(struct nvkm_timer *); 27 void nvkm_timer_alarm(struct nvkm_timer *, u32 nsec, struct nvkm_alarm *); 28 void nvkm_timer_alarm_cancel(struct nvkm_timer *, struct nvkm_alarm *); 29 30 /* Delay based on GPU time (ie. PTIMER). 31 * 32 * Will return -ETIMEDOUT unless the loop was terminated with 'break', 33 * where it will return the number of nanoseconds taken instead. 34 * 35 * NVKM_DELAY can be passed for 'cond' to disable the timeout warning, 36 * which is useful for unconditional delay loops. 37 */ 38 #define NVKM_DELAY _warn = false; 39 #define nvkm_nsec(d,n,cond...) ({ \ 40 struct nvkm_device *_device = (d); \ 41 struct nvkm_timer *_tmr = _device->timer; \ 42 u64 _nsecs = (n), _time0 = nvkm_timer_read(_tmr); \ 43 s64 _taken = 0; \ 44 bool _warn = true; \ 45 \ 46 do { \ 47 cond \ 48 } while (_taken = nvkm_timer_read(_tmr) - _time0, _taken < _nsecs); \ 49 \ 50 if (_taken >= _nsecs) { \ 51 if (_warn) { \ 52 dev_warn(_device->dev, "timeout at %s:%d/%s()!\n", \ 53 __FILE__, __LINE__, __func__); \ 54 } \ 55 _taken = -ETIMEDOUT; \ 56 } \ 57 _taken; \ 58 }) 59 #define nvkm_usec(d,u,cond...) nvkm_nsec((d), (u) * 1000, ##cond) 60 #define nvkm_msec(d,m,cond...) nvkm_usec((d), (m) * 1000, ##cond) 61 62 int nv04_timer_new(struct nvkm_device *, int, struct nvkm_timer **); 63 int nv40_timer_new(struct nvkm_device *, int, struct nvkm_timer **); 64 int nv41_timer_new(struct nvkm_device *, int, struct nvkm_timer **); 65 int gk20a_timer_new(struct nvkm_device *, int, struct nvkm_timer **); 66 #endif 67