1 /* SPDX-License-Identifier: MIT */ 2 #ifndef __NVKM_TIMER_H__ 3 #define __NVKM_TIMER_H__ 4 #include <core/subdev.h> 5 6 struct nvkm_alarm { 7 struct list_head head; 8 struct list_head exec; 9 u64 timestamp; 10 void (*func)(struct nvkm_alarm *); 11 }; 12 13 static inline void 14 nvkm_alarm_init(struct nvkm_alarm *alarm, void (*func)(struct nvkm_alarm *)) 15 { 16 INIT_LIST_HEAD(&alarm->head); 17 alarm->func = func; 18 } 19 20 struct nvkm_timer { 21 const struct nvkm_timer_func *func; 22 struct nvkm_subdev subdev; 23 24 struct list_head alarms; 25 spinlock_t lock; 26 }; 27 28 u64 nvkm_timer_read(struct nvkm_timer *); 29 void nvkm_timer_alarm(struct nvkm_timer *, u32 nsec, struct nvkm_alarm *); 30 31 struct nvkm_timer_wait { 32 struct nvkm_timer *tmr; 33 u64 limit; 34 u64 time0; 35 u64 time1; 36 int reads; 37 }; 38 39 void nvkm_timer_wait_init(struct nvkm_device *, u64 nsec, 40 struct nvkm_timer_wait *); 41 s64 nvkm_timer_wait_test(struct nvkm_timer_wait *); 42 43 /* Delay based on GPU time (ie. PTIMER). 44 * 45 * Will return -ETIMEDOUT unless the loop was terminated with 'break', 46 * where it will return the number of nanoseconds taken instead. 47 * 48 * NVKM_DELAY can be passed for 'cond' to disable the timeout warning, 49 * which is useful for unconditional delay loops. 50 */ 51 #define NVKM_DELAY _warn = false; 52 #define nvkm_nsec(d,n,cond...) ({ \ 53 struct nvkm_timer_wait _wait; \ 54 bool _warn = true; \ 55 s64 _taken = 0; \ 56 \ 57 nvkm_timer_wait_init((d), (n), &_wait); \ 58 do { \ 59 cond \ 60 } while ((_taken = nvkm_timer_wait_test(&_wait)) >= 0); \ 61 \ 62 if (_warn && _taken < 0) \ 63 dev_WARN(_wait.tmr->subdev.device->dev, "timeout\n"); \ 64 _taken; \ 65 }) 66 #define nvkm_usec(d, u, cond...) nvkm_nsec((d), (u) * 1000ULL, ##cond) 67 #define nvkm_msec(d, m, cond...) nvkm_usec((d), (m) * 1000ULL, ##cond) 68 69 #define nvkm_wait_nsec(d,n,addr,mask,data) \ 70 nvkm_nsec(d, n, \ 71 if ((nvkm_rd32(d, (addr)) & (mask)) == (data)) \ 72 break; \ 73 ) 74 #define nvkm_wait_usec(d,u,addr,mask,data) \ 75 nvkm_wait_nsec((d), (u) * 1000, (addr), (mask), (data)) 76 #define nvkm_wait_msec(d,m,addr,mask,data) \ 77 nvkm_wait_usec((d), (m) * 1000, (addr), (mask), (data)) 78 79 int nv04_timer_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_timer **); 80 int nv40_timer_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_timer **); 81 int nv41_timer_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_timer **); 82 int gk20a_timer_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_timer **); 83 #endif 84