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
|
/*
*
* (C) COPYRIGHT 2016 ARM Limited. All rights reserved.
*
* This program is free software and is provided to you under the terms of the
* GNU General Public License version 2 as published by the Free Software
* Foundation, and any use by you of this program is subject to the terms
* of such GNU licence.
*
* A copy of the licence is included with the program, and can also be obtained
* from Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#include "mali_kbase.h"
#include "mali_kbase_regs_history_debugfs.h"
#if defined(CONFIG_DEBUG_FS) && !defined(CONFIG_MALI_NO_MALI)
#include <linux/debugfs.h>
static int regs_history_size_get(void *data, u64 *val)
{
struct kbase_io_history *const h = data;
*val = h->size;
return 0;
}
static int regs_history_size_set(void *data, u64 val)
{
struct kbase_io_history *const h = data;
return kbase_io_history_resize(h, (u16)val);
}
DEFINE_SIMPLE_ATTRIBUTE(regs_history_size_fops,
regs_history_size_get,
regs_history_size_set,
"%llu\n");
/**
* regs_history_show - show callback for the register access history file.
*
* @sfile: The debugfs entry
* @data: Data associated with the entry
*
* This function is called to dump all recent accesses to the GPU registers.
*
* @return 0 if successfully prints data in debugfs entry file, failure
* otherwise
*/
static int regs_history_show(struct seq_file *sfile, void *data)
{
struct kbase_io_history *const h = sfile->private;
u16 i;
size_t iters;
unsigned long flags;
if (!h->enabled) {
seq_puts(sfile, "The register access history is disabled\n");
goto out;
}
spin_lock_irqsave(&h->lock, flags);
iters = (h->size > h->count) ? h->count : h->size;
seq_printf(sfile, "Last %zu register accesses of %zu total:\n", iters,
h->count);
for (i = 0; i < iters; ++i) {
struct kbase_io_access *io =
&h->buf[(h->count - iters + i) % h->size];
char const access = (io->addr & 1) ? 'w' : 'r';
seq_printf(sfile, "%6i: %c: reg 0x%p val %08x\n", i, access,
(void *)(io->addr & ~0x1), io->value);
}
spin_unlock_irqrestore(&h->lock, flags);
out:
return 0;
}
/**
* regs_history_open - open operation for regs_history debugfs file
*
* @in: &struct inode pointer
* @file: &struct file pointer
*
* @return file descriptor
*/
static int regs_history_open(struct inode *in, struct file *file)
{
return single_open(file, ®s_history_show, in->i_private);
}
static const struct file_operations regs_history_fops = {
.open = ®s_history_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
void kbasep_regs_history_debugfs_init(struct kbase_device *kbdev)
{
debugfs_create_bool("regs_history_enabled", S_IRUGO | S_IWUSR,
kbdev->mali_debugfs_directory,
&kbdev->io_history.enabled);
debugfs_create_file("regs_history_size", S_IRUGO | S_IWUSR,
kbdev->mali_debugfs_directory,
&kbdev->io_history, ®s_history_size_fops);
debugfs_create_file("regs_history", S_IRUGO,
kbdev->mali_debugfs_directory, &kbdev->io_history,
®s_history_fops);
}
#endif /* CONFIG_DEBUG_FS */
|
