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
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Sync File validation framework and debug information
*
* Copyright (C) 2012 Google, Inc.
*/
#include <linux/debugfs.h>
#include "sync_debug.h"
static struct dentry *dbgfs;
static LIST_HEAD(sync_timeline_list_head);
static DEFINE_SPINLOCK(sync_timeline_list_lock);
void sync_timeline_debug_add(struct sync_timeline *obj)
{
unsigned long flags;
spin_lock_irqsave(&sync_timeline_list_lock, flags);
list_add_tail(&obj->sync_timeline_list, &sync_timeline_list_head);
spin_unlock_irqrestore(&sync_timeline_list_lock, flags);
}
void sync_timeline_debug_remove(struct sync_timeline *obj)
{
unsigned long flags;
spin_lock_irqsave(&sync_timeline_list_lock, flags);
list_del(&obj->sync_timeline_list);
spin_unlock_irqrestore(&sync_timeline_list_lock, flags);
}
static const char *sync_status_str(int status)
{
if (status < 0)
return "error";
if (status > 0)
return "signaled";
return "active";
}
static void sync_print_fence(struct seq_file *s,
struct dma_fence *fence, bool show)
{
struct sync_timeline *parent = dma_fence_parent(fence);
int status;
status = dma_fence_get_status_locked(fence);
seq_printf(s, " %s%sfence %s",
show ? parent->name : "",
show ? "_" : "",
sync_status_str(status));
if (test_bit(DMA_FENCE_FLAG_TIMESTAMP_BIT, &fence->flags)) {
struct timespec64 ts64 =
ktime_to_timespec64(fence->timestamp);
seq_printf(s, "@%lld.%09ld", (s64)ts64.tv_sec, ts64.tv_nsec);
}
seq_printf(s, ": %lld", fence->seqno);
seq_printf(s, " / %d", parent->value);
seq_putc(s, '\n');
}
static void sync_print_obj(struct seq_file *s, struct sync_timeline *obj)
{
struct list_head *pos;
seq_printf(s, "%s: %d\n", obj->name, obj->value);
spin_lock(&obj->lock); /* Caller already disabled IRQ. */
list_for_each(pos, &obj->pt_list) {
struct sync_pt *pt = container_of(pos, struct sync_pt, link);
sync_print_fence(s, &pt->base, false);
}
spin_unlock(&obj->lock);
}
static int sync_info_debugfs_show(struct seq_file *s, void *unused)
{
struct list_head *pos;
seq_puts(s, "objs:\n--------------\n");
spin_lock_irq(&sync_timeline_list_lock);
list_for_each(pos, &sync_timeline_list_head) {
struct sync_timeline *obj =
container_of(pos, struct sync_timeline,
sync_timeline_list);
sync_print_obj(s, obj);
seq_putc(s, '\n');
}
spin_unlock_irq(&sync_timeline_list_lock);
seq_puts(s, "fences:\n--------------\n");
return 0;
}
DEFINE_SHOW_ATTRIBUTE(sync_info_debugfs);
static __init int sync_debugfs_init(void)
{
dbgfs = debugfs_create_dir("sync", NULL);
/*
* The debugfs files won't ever get removed and thus, there is
* no need to protect it against removal races. The use of
* debugfs_create_file_unsafe() is actually safe here.
*/
debugfs_create_file_unsafe("info", 0444, dbgfs, NULL,
&sync_info_debugfs_fops);
debugfs_create_file_unsafe("sw_sync", 0644, dbgfs, NULL,
&sw_sync_debugfs_fops);
return 0;
}
late_initcall(sync_debugfs_init);
|
