/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __NVKM_TIMER_H__
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#define __NVKM_TIMER_H__
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#include <core/subdev.h>
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struct nvkm_alarm {
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struct list_head head;
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struct list_head exec;
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u64 timestamp;
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void (*func)(struct nvkm_alarm *);
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};
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static inline void
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nvkm_alarm_init(struct nvkm_alarm *alarm, void (*func)(struct nvkm_alarm *))
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{
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INIT_LIST_HEAD(&alarm->head);
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alarm->func = func;
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}
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struct nvkm_timer {
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const struct nvkm_timer_func *func;
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struct nvkm_subdev subdev;
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struct list_head alarms;
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spinlock_t lock;
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};
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u64 nvkm_timer_read(struct nvkm_timer *);
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void nvkm_timer_alarm(struct nvkm_timer *, u32 nsec, struct nvkm_alarm *);
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/* Delay based on GPU time (ie. PTIMER).
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*
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* Will return -ETIMEDOUT unless the loop was terminated with 'break',
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* where it will return the number of nanoseconds taken instead.
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*
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* NVKM_DELAY can be passed for 'cond' to disable the timeout warning,
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* which is useful for unconditional delay loops.
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*/
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#define NVKM_DELAY _warn = false;
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#define nvkm_nsec(d,n,cond...) ({ \
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struct nvkm_device *_device = (d); \
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struct nvkm_timer *_tmr = _device->timer; \
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u64 _nsecs = (n), _time0 = nvkm_timer_read(_tmr); \
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s64 _taken = 0; \
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bool _warn = true; \
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\
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do { \
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cond \
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} while (_taken = nvkm_timer_read(_tmr) - _time0, _taken < _nsecs); \
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\
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if (_taken >= _nsecs) { \
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if (_warn) \
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dev_WARN(_device->dev, "timeout\n"); \
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_taken = -ETIMEDOUT; \
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} \
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_taken; \
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})
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#define nvkm_usec(d,u,cond...) nvkm_nsec((d), (u) * 1000, ##cond)
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#define nvkm_msec(d,m,cond...) nvkm_usec((d), (m) * 1000, ##cond)
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#define nvkm_wait_nsec(d,n,addr,mask,data) \
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nvkm_nsec(d, n, \
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if ((nvkm_rd32(d, (addr)) & (mask)) == (data)) \
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break; \
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)
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#define nvkm_wait_usec(d,u,addr,mask,data) \
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nvkm_wait_nsec((d), (u) * 1000, (addr), (mask), (data))
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#define nvkm_wait_msec(d,m,addr,mask,data) \
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nvkm_wait_usec((d), (m) * 1000, (addr), (mask), (data))
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int nv04_timer_new(struct nvkm_device *, int, struct nvkm_timer **);
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int nv40_timer_new(struct nvkm_device *, int, struct nvkm_timer **);
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int nv41_timer_new(struct nvkm_device *, int, struct nvkm_timer **);
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int gk20a_timer_new(struct nvkm_device *, int, struct nvkm_timer **);
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#endif
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