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1/* SPDX-License-Identifier: MIT */2#ifndef __NVKM_TIMER_H__3#define __NVKM_TIMER_H__4#include <core/subdev.h>5 6struct nvkm_alarm {7 struct list_head head;8 struct list_head exec;9 u64 timestamp;10 void (*func)(struct nvkm_alarm *);11};12 13static inline void14nvkm_alarm_init(struct nvkm_alarm *alarm, void (*func)(struct nvkm_alarm *))15{16 INIT_LIST_HEAD(&alarm->head);17 alarm->func = func;18}19 20struct 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 28u64 nvkm_timer_read(struct nvkm_timer *);29void nvkm_timer_alarm(struct nvkm_timer *, u32 nsec, struct nvkm_alarm *);30 31struct nvkm_timer_wait {32 struct nvkm_timer *tmr;33 u64 limit;34 u64 time0;35 u64 time1;36 int reads;37};38 39void nvkm_timer_wait_init(struct nvkm_device *, u64 nsec,40 struct nvkm_timer_wait *);41s64 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 79int nv04_timer_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_timer **);80int nv40_timer_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_timer **);81int nv41_timer_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_timer **);82int gk20a_timer_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_timer **);83#endif84