1 #ifndef __NVKM_TIMER_H__
2 #define __NVKM_TIMER_H__
3 #include <core/subdev.h>
4
5 struct nvkm_alarm {
6 struct list_head head;
7 struct list_head exec;
8 u64 timestamp;
9 void (*func)(struct nvkm_alarm *);
10 };
11
12 static inline void
nvkm_alarm_init(struct nvkm_alarm * alarm,void (* func)(struct nvkm_alarm *))13 nvkm_alarm_init(struct nvkm_alarm *alarm, void (*func)(struct nvkm_alarm *))
14 {
15 INIT_LIST_HEAD(&alarm->head);
16 alarm->func = func;
17 }
18
19 struct nvkm_timer {
20 const struct nvkm_timer_func *func;
21 struct nvkm_subdev subdev;
22
23 struct list_head alarms;
24 spinlock_t lock;
25 };
26
27 u64 nvkm_timer_read(struct nvkm_timer *);
28 void nvkm_timer_alarm(struct nvkm_timer *, u32 nsec, struct nvkm_alarm *);
29 void nvkm_timer_alarm_cancel(struct nvkm_timer *, struct nvkm_alarm *);
30
31 /* Delay based on GPU time (ie. PTIMER).
32 *
33 * Will return -ETIMEDOUT unless the loop was terminated with 'break',
34 * where it will return the number of nanoseconds taken instead.
35 *
36 * NVKM_DELAY can be passed for 'cond' to disable the timeout warning,
37 * which is useful for unconditional delay loops.
38 */
39 #define NVKM_DELAY _warn = false;
40 #define nvkm_nsec(d,n,cond...) ({ \
41 struct nvkm_device *_device = (d); \
42 struct nvkm_timer *_tmr = _device->timer; \
43 u64 _nsecs = (n), _time0 = nvkm_timer_read(_tmr); \
44 s64 _taken = 0; \
45 bool _warn = true; \
46 \
47 do { \
48 cond \
49 } while (_taken = nvkm_timer_read(_tmr) - _time0, _taken < _nsecs); \
50 \
51 if (_taken >= _nsecs) { \
52 if (_warn) { \
53 dev_warn(_device->dev, "timeout at %s:%d/%s()!\n", \
54 __FILE__, __LINE__, __func__); \
55 } \
56 _taken = -ETIMEDOUT; \
57 } \
58 _taken; \
59 })
60 #define nvkm_usec(d,u,cond...) nvkm_nsec((d), (u) * 1000, ##cond)
61 #define nvkm_msec(d,m,cond...) nvkm_usec((d), (m) * 1000, ##cond)
62
63 #define nvkm_wait_nsec(d,n,addr,mask,data) \
64 nvkm_nsec(d, n, \
65 if ((nvkm_rd32(d, (addr)) & (mask)) == (data)) \
66 break; \
67 )
68 #define nvkm_wait_usec(d,u,addr,mask,data) \
69 nvkm_wait_nsec((d), (u) * 1000, (addr), (mask), (data))
70 #define nvkm_wait_msec(d,m,addr,mask,data) \
71 nvkm_wait_usec((d), (m) * 1000, (addr), (mask), (data))
72
73 int nv04_timer_new(struct nvkm_device *, int, struct nvkm_timer **);
74 int nv40_timer_new(struct nvkm_device *, int, struct nvkm_timer **);
75 int nv41_timer_new(struct nvkm_device *, int, struct nvkm_timer **);
76 int gk20a_timer_new(struct nvkm_device *, int, struct nvkm_timer **);
77 #endif
78