1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
|
/*
* Copyright 2013-2014 Red Hat Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
#include <core/event.h>
#include <core/subdev.h>
static void
nvkm_event_put(struct nvkm_event *event, u32 types, int index)
{
assert_spin_locked(&event->refs_lock);
nvkm_trace(event->subdev, "event: decr %08x on %d\n", types, index);
while (types) {
int type = __ffs(types); types &= ~(1 << type);
if (--event->refs[index * event->types_nr + type] == 0) {
nvkm_trace(event->subdev, "event: blocking %d on %d\n", type, index);
if (event->func->fini)
event->func->fini(event, 1 << type, index);
}
}
}
static void
nvkm_event_get(struct nvkm_event *event, u32 types, int index)
{
assert_spin_locked(&event->refs_lock);
nvkm_trace(event->subdev, "event: incr %08x on %d\n", types, index);
while (types) {
int type = __ffs(types); types &= ~(1 << type);
if (++event->refs[index * event->types_nr + type] == 1) {
nvkm_trace(event->subdev, "event: allowing %d on %d\n", type, index);
if (event->func->init)
event->func->init(event, 1 << type, index);
}
}
}
static void
nvkm_event_ntfy_state(struct nvkm_event_ntfy *ntfy)
{
struct nvkm_event *event = ntfy->event;
unsigned long flags;
nvkm_trace(event->subdev, "event: ntfy state changed\n");
spin_lock_irqsave(&event->refs_lock, flags);
if (atomic_read(&ntfy->allowed) != ntfy->running) {
if (ntfy->running) {
nvkm_event_put(ntfy->event, ntfy->bits, ntfy->id);
ntfy->running = false;
} else {
nvkm_event_get(ntfy->event, ntfy->bits, ntfy->id);
ntfy->running = true;
}
}
spin_unlock_irqrestore(&event->refs_lock, flags);
}
static void
nvkm_event_ntfy_remove(struct nvkm_event_ntfy *ntfy)
{
spin_lock_irq(&ntfy->event->list_lock);
list_del_init(&ntfy->head);
spin_unlock_irq(&ntfy->event->list_lock);
}
static void
nvkm_event_ntfy_insert(struct nvkm_event_ntfy *ntfy)
{
spin_lock_irq(&ntfy->event->list_lock);
list_add_tail(&ntfy->head, &ntfy->event->ntfy);
spin_unlock_irq(&ntfy->event->list_lock);
}
static void
nvkm_event_ntfy_block_(struct nvkm_event_ntfy *ntfy, bool wait)
{
struct nvkm_subdev *subdev = ntfy->event->subdev;
nvkm_trace(subdev, "event: ntfy block %08x on %d wait:%d\n", ntfy->bits, ntfy->id, wait);
if (atomic_xchg(&ntfy->allowed, 0) == 1) {
nvkm_event_ntfy_state(ntfy);
if (wait)
nvkm_event_ntfy_remove(ntfy);
}
}
void
nvkm_event_ntfy_block(struct nvkm_event_ntfy *ntfy)
{
if (ntfy->event)
nvkm_event_ntfy_block_(ntfy, ntfy->wait);
}
void
nvkm_event_ntfy_allow(struct nvkm_event_ntfy *ntfy)
{
nvkm_trace(ntfy->event->subdev, "event: ntfy allow %08x on %d\n", ntfy->bits, ntfy->id);
if (atomic_xchg(&ntfy->allowed, 1) == 0) {
nvkm_event_ntfy_state(ntfy);
if (ntfy->wait)
nvkm_event_ntfy_insert(ntfy);
}
}
void
nvkm_event_ntfy_del(struct nvkm_event_ntfy *ntfy)
{
struct nvkm_event *event = ntfy->event;
if (!event)
return;
nvkm_trace(event->subdev, "event: ntfy del %08x on %d\n", ntfy->bits, ntfy->id);
nvkm_event_ntfy_block_(ntfy, false);
nvkm_event_ntfy_remove(ntfy);
ntfy->event = NULL;
}
void
nvkm_event_ntfy_add(struct nvkm_event *event, int id, u32 bits, bool wait, nvkm_event_func func,
struct nvkm_event_ntfy *ntfy)
{
nvkm_trace(event->subdev, "event: ntfy add %08x on %d wait:%d\n", id, bits, wait);
ntfy->event = event;
ntfy->id = id;
ntfy->bits = bits;
ntfy->wait = wait;
ntfy->func = func;
atomic_set(&ntfy->allowed, 0);
ntfy->running = false;
INIT_LIST_HEAD(&ntfy->head);
if (!ntfy->wait)
nvkm_event_ntfy_insert(ntfy);
}
bool
nvkm_event_ntfy_valid(struct nvkm_event *event, int id, u32 bits)
{
return true;
}
void
nvkm_event_ntfy(struct nvkm_event *event, int id, u32 bits)
{
struct nvkm_event_ntfy *ntfy, *ntmp;
unsigned long flags;
if (!event->refs || WARN_ON(id >= event->index_nr))
return;
nvkm_trace(event->subdev, "event: ntfy %08x on %d\n", bits, id);
spin_lock_irqsave(&event->list_lock, flags);
list_for_each_entry_safe(ntfy, ntmp, &event->ntfy, head) {
if (ntfy->id == id && ntfy->bits & bits) {
if (atomic_read(&ntfy->allowed))
ntfy->func(ntfy, ntfy->bits & bits);
}
}
spin_unlock_irqrestore(&event->list_lock, flags);
}
void
nvkm_event_fini(struct nvkm_event *event)
{
if (event->refs) {
kfree(event->refs);
event->refs = NULL;
}
}
int
__nvkm_event_init(const struct nvkm_event_func *func, struct nvkm_subdev *subdev,
int types_nr, int index_nr, struct nvkm_event *event)
{
event->refs = kzalloc(array3_size(index_nr, types_nr, sizeof(*event->refs)), GFP_KERNEL);
if (!event->refs)
return -ENOMEM;
event->func = func;
event->subdev = subdev;
event->types_nr = types_nr;
event->index_nr = index_nr;
INIT_LIST_HEAD(&event->ntfy);
return 0;
}
|
