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
|
/*
* Copyright 2015 Advanced Micro Devices, 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 <linux/kthread.h>
#include <linux/wait.h>
#include <linux/sched.h>
#include <drm/drmP.h>
#include "gpu_scheduler.h"
struct amd_sched_fence *amd_sched_fence_create(struct amd_sched_entity *s_entity, void *owner)
{
struct amd_sched_fence *fence = NULL;
unsigned seq;
fence = kmem_cache_zalloc(sched_fence_slab, GFP_KERNEL);
if (fence == NULL)
return NULL;
INIT_LIST_HEAD(&fence->scheduled_cb);
fence->owner = owner;
fence->sched = s_entity->sched;
spin_lock_init(&fence->lock);
seq = atomic_inc_return(&s_entity->fence_seq);
fence_init(&fence->base, &amd_sched_fence_ops, &fence->lock,
s_entity->fence_context, seq);
return fence;
}
void amd_sched_fence_signal(struct amd_sched_fence *fence)
{
int ret = fence_signal(&fence->base);
if (!ret)
FENCE_TRACE(&fence->base, "signaled from irq context\n");
else
FENCE_TRACE(&fence->base, "was already signaled\n");
}
void amd_sched_job_pre_schedule(struct amd_gpu_scheduler *sched ,
struct amd_sched_job *s_job)
{
unsigned long flags;
spin_lock_irqsave(&sched->job_list_lock, flags);
list_add_tail(&s_job->node, &sched->ring_mirror_list);
sched->ops->begin_job(s_job);
spin_unlock_irqrestore(&sched->job_list_lock, flags);
}
void amd_sched_fence_scheduled(struct amd_sched_fence *s_fence)
{
struct fence_cb *cur, *tmp;
set_bit(AMD_SCHED_FENCE_SCHEDULED_BIT, &s_fence->base.flags);
list_for_each_entry_safe(cur, tmp, &s_fence->scheduled_cb, node) {
list_del_init(&cur->node);
cur->func(&s_fence->base, cur);
}
}
static const char *amd_sched_fence_get_driver_name(struct fence *fence)
{
return "amd_sched";
}
static const char *amd_sched_fence_get_timeline_name(struct fence *f)
{
struct amd_sched_fence *fence = to_amd_sched_fence(f);
return (const char *)fence->sched->name;
}
static bool amd_sched_fence_enable_signaling(struct fence *f)
{
return true;
}
/**
* amd_sched_fence_free - free up the fence memory
*
* @rcu: RCU callback head
*
* Free up the fence memory after the RCU grace period.
*/
static void amd_sched_fence_free(struct rcu_head *rcu)
{
struct fence *f = container_of(rcu, struct fence, rcu);
struct amd_sched_fence *fence = to_amd_sched_fence(f);
kmem_cache_free(sched_fence_slab, fence);
}
/**
* amd_sched_fence_release - callback that fence can be freed
*
* @fence: fence
*
* This function is called when the reference count becomes zero.
* It just RCU schedules freeing up the fence.
*/
static void amd_sched_fence_release(struct fence *f)
{
call_rcu(&f->rcu, amd_sched_fence_free);
}
const struct fence_ops amd_sched_fence_ops = {
.get_driver_name = amd_sched_fence_get_driver_name,
.get_timeline_name = amd_sched_fence_get_timeline_name,
.enable_signaling = amd_sched_fence_enable_signaling,
.signaled = NULL,
.wait = fence_default_wait,
.release = amd_sched_fence_release,
};
|
