1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __NVKM_TIMER_H__
3 #define __NVKM_TIMER_H__
4 #include <core/subdev.h>
5
6 struct nvkm_alarm {
7 struct list_head head;
8 struct list_head exec;
9 u64 timestamp;
10 void (*func)(struct nvkm_alarm *);
11 };
12
13 static inline void
nvkm_alarm_init(struct nvkm_alarm * alarm,void (* func)(struct nvkm_alarm *))14 nvkm_alarm_init(struct nvkm_alarm *alarm, void (*func)(struct nvkm_alarm *))
15 {
16 INIT_LIST_HEAD(&alarm->head);
17 alarm->func = func;
18 }
19
20 struct 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
28 u64 nvkm_timer_read(struct nvkm_timer *);
29 void nvkm_timer_alarm(struct nvkm_timer *, u32 nsec, 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\n"); \
54 _taken = -ETIMEDOUT; \
55 } \
56 _taken; \
57 })
58 #define nvkm_usec(d,u,cond...) nvkm_nsec((d), (u) * 1000, ##cond)
59 #define nvkm_msec(d,m,cond...) nvkm_usec((d), (m) * 1000, ##cond)
60
61 #define nvkm_wait_nsec(d,n,addr,mask,data) \
62 nvkm_nsec(d, n, \
63 if ((nvkm_rd32(d, (addr)) & (mask)) == (data)) \
64 break; \
65 )
66 #define nvkm_wait_usec(d,u,addr,mask,data) \
67 nvkm_wait_nsec((d), (u) * 1000, (addr), (mask), (data))
68 #define nvkm_wait_msec(d,m,addr,mask,data) \
69 nvkm_wait_usec((d), (m) * 1000, (addr), (mask), (data))
70
71 int nv04_timer_new(struct nvkm_device *, int, struct nvkm_timer **);
72 int nv40_timer_new(struct nvkm_device *, int, struct nvkm_timer **);
73 int nv41_timer_new(struct nvkm_device *, int, struct nvkm_timer **);
74 int gk20a_timer_new(struct nvkm_device *, int, struct nvkm_timer **);
75 #endif
76
