1 /* SPDX-License-Identifier: MIT */
2 #ifndef __NVKM_EVENT_H__
3 #define __NVKM_EVENT_H__
4 #include <core/os.h>
5 struct nvkm_object;
6 struct nvkm_oclass;
7 struct nvkm_uevent;
8 
9 struct nvkm_event {
10 	const struct nvkm_event_func *func;
11 	struct nvkm_subdev *subdev;
12 
13 	int types_nr;
14 	int index_nr;
15 
16 	spinlock_t refs_lock;
17 	rwlock_t list_lock;
18 	int *refs;
19 
20 	struct list_head ntfy;
21 };
22 
23 struct nvkm_event_func {
24 	void (*init)(struct nvkm_event *, int type, int index);
25 	void (*fini)(struct nvkm_event *, int type, int index);
26 };
27 
28 int  __nvkm_event_init(const struct nvkm_event_func *func, struct nvkm_subdev *, int types_nr,
29 		       int index_nr, struct nvkm_event *);
30 
31 /* Each nvkm_event needs its own lockdep class due to inter-dependencies, to
32  * prevent lockdep false-positives.
33  *
34  * Inlining the spinlock initialisation ensures each is unique.
35  */
36 static __always_inline int
nvkm_event_init(const struct nvkm_event_func * func,struct nvkm_subdev * subdev,int types_nr,int index_nr,struct nvkm_event * event)37 nvkm_event_init(const struct nvkm_event_func *func, struct nvkm_subdev *subdev,
38 		int types_nr, int index_nr, struct nvkm_event *event)
39 {
40 	spin_lock_init(&event->refs_lock);
41 	rwlock_init(&event->list_lock);
42 	return __nvkm_event_init(func, subdev, types_nr, index_nr, event);
43 }
44 
45 void nvkm_event_fini(struct nvkm_event *);
46 
47 #define NVKM_EVENT_KEEP 0
48 #define NVKM_EVENT_DROP 1
49 struct nvkm_event_ntfy;
50 typedef int (*nvkm_event_func)(struct nvkm_event_ntfy *, u32 bits);
51 
52 struct nvkm_event_ntfy {
53 	struct nvkm_event *event;
54 	int id;
55 	u32 bits;
56 	bool wait;
57 	nvkm_event_func func;
58 
59 	atomic_t allowed;
60 	bool running;
61 
62 	struct list_head head;
63 };
64 
65 void nvkm_event_ntfy(struct nvkm_event *, int id, u32 bits);
66 bool nvkm_event_ntfy_valid(struct nvkm_event *, int id, u32 bits);
67 void nvkm_event_ntfy_add(struct nvkm_event *, int id, u32 bits, bool wait, nvkm_event_func,
68 			 struct nvkm_event_ntfy *);
69 void nvkm_event_ntfy_del(struct nvkm_event_ntfy *);
70 void nvkm_event_ntfy_allow(struct nvkm_event_ntfy *);
71 void nvkm_event_ntfy_block(struct nvkm_event_ntfy *);
72 
73 typedef int (*nvkm_uevent_func)(struct nvkm_object *, u64 token, u32 bits);
74 
75 int nvkm_uevent_new(const struct nvkm_oclass *, void *argv, u32 argc, struct nvkm_object **);
76 int nvkm_uevent_add(struct nvkm_uevent *, struct nvkm_event *, int id, u32 bits, nvkm_uevent_func);
77 #endif
78