1/* $NetBSD: timer.h,v 1.3 2021/12/18 23:45:33 riastradh Exp $ */ 2 3/* SPDX-License-Identifier: MIT */ 4#ifndef __NVKM_TIMER_H__ 5#define __NVKM_TIMER_H__ 6#include <core/subdev.h> 7 8struct nvkm_alarm { 9 struct list_head head; 10 struct list_head exec; 11 u64 timestamp; 12 void (*func)(struct nvkm_alarm *); 13}; 14 15static inline void 16nvkm_alarm_init(struct nvkm_alarm *alarm, void (*func)(struct nvkm_alarm *)) 17{ 18 INIT_LIST_HEAD(&alarm->head); 19 alarm->func = func; 20} 21 22struct nvkm_timer { 23 const struct nvkm_timer_func *func; 24 struct nvkm_subdev subdev; 25 26 struct list_head alarms; 27 spinlock_t lock; 28}; 29 30u64 nvkm_timer_read(struct nvkm_timer *); 31void nvkm_timer_alarm(struct nvkm_timer *, u32 nsec, struct nvkm_alarm *); 32 33struct nvkm_timer_wait { 34 struct nvkm_timer *tmr; 35 u64 limit; 36 u64 time0; 37 u64 time1; 38 int reads; 39}; 40 41void nvkm_timer_wait_init(struct nvkm_device *, u64 nsec, 42 struct nvkm_timer_wait *); 43s64 nvkm_timer_wait_test(struct nvkm_timer_wait *); 44 45/* Delay based on GPU time (ie. PTIMER). 46 * 47 * Will return -ETIMEDOUT unless the loop was terminated with 'break', 48 * where it will return the number of nanoseconds taken instead. 49 * 50 * NVKM_DELAY can be passed for 'cond' to disable the timeout warning, 51 * which is useful for unconditional delay loops. 52 */ 53#define NVKM_DELAY _warn = false; 54#define nvkm_nsec(d,n,cond...) ({ \ 55 struct nvkm_timer_wait _wait; \ 56 bool _warn = true; \ 57 s64 _taken = 0; \ 58 \ 59 nvkm_timer_wait_init((d), (n), &_wait); \ 60 do { \ 61 cond \ 62 } while ((_taken = nvkm_timer_wait_test(&_wait)) >= 0); \ 63 \ 64 if (_warn && _taken < 0) \ 65 dev_WARN(_wait.tmr->subdev.device->dev, "timeout\n"); \ 66 _taken; \ 67}) 68#define nvkm_usec(d,u,cond...) nvkm_nsec((d), (u) * 1000, ##cond) 69#define nvkm_msec(d,m,cond...) nvkm_usec((d), (m) * 1000, ##cond) 70 71#define nvkm_wait_nsec(d,n,addr,mask,data) \ 72 nvkm_nsec(d, n, \ 73 if ((nvkm_rd32(d, (addr)) & (mask)) == (data)) \ 74 break; \ 75 ) 76#define nvkm_wait_usec(d,u,addr,mask,data) \ 77 nvkm_wait_nsec((d), (u) * 1000, (addr), (mask), (data)) 78#define nvkm_wait_msec(d,m,addr,mask,data) \ 79 nvkm_wait_usec((d), (m) * 1000, (addr), (mask), (data)) 80 81int nv04_timer_new(struct nvkm_device *, int, struct nvkm_timer **); 82int nv40_timer_new(struct nvkm_device *, int, struct nvkm_timer **); 83int nv41_timer_new(struct nvkm_device *, int, struct nvkm_timer **); 84int gk20a_timer_new(struct nvkm_device *, int, struct nvkm_timer **); 85#endif 86