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
|
/*
* Copyright © 2017 Intel Corporation
*
* 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 (including the next
* paragraph) 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 AUTHORS OR COPYRIGHT HOLDERS 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 "lib_sw_fence.h"
/* Small library of different fence types useful for writing tests */
static int __i915_sw_fence_call
nop_fence_notify(struct i915_sw_fence *fence, enum i915_sw_fence_notify state)
{
return NOTIFY_DONE;
}
void __onstack_fence_init(struct i915_sw_fence *fence,
const char *name,
struct lock_class_key *key)
{
debug_fence_init_onstack(fence);
__init_waitqueue_head(&fence->wait, name, key);
atomic_set(&fence->pending, 1);
fence->flags = (unsigned long)nop_fence_notify;
}
void onstack_fence_fini(struct i915_sw_fence *fence)
{
if (!fence->flags)
return;
i915_sw_fence_commit(fence);
i915_sw_fence_fini(fence);
}
static void timed_fence_wake(struct timer_list *t)
{
struct timed_fence *tf = from_timer(tf, t, timer);
i915_sw_fence_commit(&tf->fence);
}
void timed_fence_init(struct timed_fence *tf, unsigned long expires)
{
onstack_fence_init(&tf->fence);
timer_setup_on_stack(&tf->timer, timed_fence_wake, 0);
if (time_after(expires, jiffies))
mod_timer(&tf->timer, expires);
else
i915_sw_fence_commit(&tf->fence);
}
void timed_fence_fini(struct timed_fence *tf)
{
if (del_timer_sync(&tf->timer))
i915_sw_fence_commit(&tf->fence);
destroy_timer_on_stack(&tf->timer);
i915_sw_fence_fini(&tf->fence);
}
struct heap_fence {
struct i915_sw_fence fence;
union {
struct kref ref;
struct rcu_head rcu;
};
};
static int __i915_sw_fence_call
heap_fence_notify(struct i915_sw_fence *fence, enum i915_sw_fence_notify state)
{
struct heap_fence *h = container_of(fence, typeof(*h), fence);
switch (state) {
case FENCE_COMPLETE:
break;
case FENCE_FREE:
heap_fence_put(&h->fence);
}
return NOTIFY_DONE;
}
struct i915_sw_fence *heap_fence_create(gfp_t gfp)
{
struct heap_fence *h;
h = kmalloc(sizeof(*h), gfp);
if (!h)
return NULL;
i915_sw_fence_init(&h->fence, heap_fence_notify);
refcount_set(&h->ref.refcount, 2);
return &h->fence;
}
static void heap_fence_release(struct kref *ref)
{
struct heap_fence *h = container_of(ref, typeof(*h), ref);
i915_sw_fence_fini(&h->fence);
kfree_rcu(h, rcu);
}
void heap_fence_put(struct i915_sw_fence *fence)
{
struct heap_fence *h = container_of(fence, typeof(*h), fence);
kref_put(&h->ref, heap_fence_release);
}
|
