1 /* SPDX-License-Identifier: MIT */
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 struct nvkm_timer_wait {
32 struct nvkm_timer *tmr;
33 u64 limit;
34 u64 time0;
35 u64 time1;
36 int reads;
37 };
38
39 void nvkm_timer_wait_init(struct nvkm_device *, u64 nsec,
40 struct nvkm_timer_wait *);
41 s64 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
79 int nv04_timer_new(struct nvkm_device *, int, struct nvkm_timer **);
80 int nv40_timer_new(struct nvkm_device *, int, struct nvkm_timer **);
81 int nv41_timer_new(struct nvkm_device *, int, struct nvkm_timer **);
82 int gk20a_timer_new(struct nvkm_device *, int, struct nvkm_timer **);
83 #endif
84