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
|
/*
*
* (C) COPYRIGHT 2019-2020 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, you can access it online at
* http://www.gnu.org/licenses/gpl-2.0.html.
*
* SPDX-License-Identifier: GPL-2.0
*
*/
#if !defined(_KBASE_TL_SERIALIZE_H)
#define _KBASE_TL_SERIALIZE_H
#include <mali_kbase.h>
#include <linux/timer.h>
/* The number of nanoseconds in a second. */
#define NSECS_IN_SEC 1000000000ull /* ns */
/**
* kbasep_serialize_bytes - serialize bytes to the message buffer
*
* Serialize bytes as is using memcpy()
*
* @buffer: Message buffer
* @pos: Message buffer offset
* @bytes: Bytes to serialize
* @len: Length of bytes array
*
* Return: updated position in the buffer
*/
static inline size_t kbasep_serialize_bytes(
char *buffer,
size_t pos,
const void *bytes,
size_t len)
{
KBASE_DEBUG_ASSERT(buffer);
KBASE_DEBUG_ASSERT(bytes);
memcpy(&buffer[pos], bytes, len);
return pos + len;
}
/**
* kbasep_serialize_string - serialize string to the message buffer
*
* String is serialized as 4 bytes for string size,
* then string content and then null terminator.
*
* @buffer: Message buffer
* @pos: Message buffer offset
* @string: String to serialize
* @max_write_size: Number of bytes that can be stored in buffer
*
* Return: updated position in the buffer
*/
static inline size_t kbasep_serialize_string(
char *buffer,
size_t pos,
const char *string,
size_t max_write_size)
{
u32 string_len;
KBASE_DEBUG_ASSERT(buffer);
KBASE_DEBUG_ASSERT(string);
/* Timeline string consists of at least string length and nul
* terminator.
*/
KBASE_DEBUG_ASSERT(max_write_size >= sizeof(string_len) + sizeof(char));
max_write_size -= sizeof(string_len);
string_len = strlcpy(
&buffer[pos + sizeof(string_len)],
string,
max_write_size);
string_len += sizeof(char);
/* Make sure that the source string fit into the buffer. */
KBASE_DEBUG_ASSERT(string_len <= max_write_size);
/* Update string length. */
memcpy(&buffer[pos], &string_len, sizeof(string_len));
return pos + sizeof(string_len) + string_len;
}
/**
* kbasep_serialize_timestamp - serialize timestamp to the message buffer
*
* Get current timestamp using kbasep_get_timestamp()
* and serialize it as 64 bit unsigned integer.
*
* @buffer: Message buffer
* @pos: Message buffer offset
*
* Return: updated position in the buffer
*/
static inline size_t kbasep_serialize_timestamp(void *buffer, size_t pos)
{
u64 timestamp;
timestamp = ktime_get_raw_ns();
return kbasep_serialize_bytes(
buffer, pos,
×tamp, sizeof(timestamp));
}
#endif /* _KBASE_TL_SERIALIZE_H */
|
