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