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
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
|
// SPDX-License-Identifier: GPL-2.0
/*
* u_ether_configfs.h
*
* Utility definitions for configfs support in USB Ethernet functions
*
* Copyright (c) 2013 Samsung Electronics Co., Ltd.
* http://www.samsung.com
*
* Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
*/
#ifndef __U_ETHER_CONFIGFS_H
#define __U_ETHER_CONFIGFS_H
#define USB_ETHERNET_CONFIGFS_ITEM(_f_) \
static void _f_##_attr_release(struct config_item *item) \
{ \
struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item); \
\
usb_put_function_instance(&opts->func_inst); \
} \
\
static struct configfs_item_operations _f_##_item_ops = { \
.release = _f_##_attr_release, \
}
#define USB_ETHERNET_CONFIGFS_ITEM_ATTR_DEV_ADDR(_f_) \
static ssize_t _f_##_opts_dev_addr_show(struct config_item *item, \
char *page) \
{ \
struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item); \
int result; \
\
mutex_lock(&opts->lock); \
result = gether_get_dev_addr(opts->net, page, PAGE_SIZE); \
mutex_unlock(&opts->lock); \
\
return result; \
} \
\
static ssize_t _f_##_opts_dev_addr_store(struct config_item *item, \
const char *page, size_t len)\
{ \
struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item); \
int ret; \
\
mutex_lock(&opts->lock); \
if (opts->refcnt) { \
mutex_unlock(&opts->lock); \
return -EBUSY; \
} \
\
ret = gether_set_dev_addr(opts->net, page); \
mutex_unlock(&opts->lock); \
if (!ret) \
ret = len; \
return ret; \
} \
\
CONFIGFS_ATTR(_f_##_opts_, dev_addr)
#define USB_ETHERNET_CONFIGFS_ITEM_ATTR_HOST_ADDR(_f_) \
static ssize_t _f_##_opts_host_addr_show(struct config_item *item, \
char *page) \
{ \
struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item); \
int result; \
\
mutex_lock(&opts->lock); \
result = gether_get_host_addr(opts->net, page, PAGE_SIZE); \
mutex_unlock(&opts->lock); \
\
return result; \
} \
\
static ssize_t _f_##_opts_host_addr_store(struct config_item *item, \
const char *page, size_t len)\
{ \
struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item); \
int ret; \
\
mutex_lock(&opts->lock); \
if (opts->refcnt) { \
mutex_unlock(&opts->lock); \
return -EBUSY; \
} \
\
ret = gether_set_host_addr(opts->net, page); \
mutex_unlock(&opts->lock); \
if (!ret) \
ret = len; \
return ret; \
} \
\
CONFIGFS_ATTR(_f_##_opts_, host_addr)
#define USB_ETHERNET_CONFIGFS_ITEM_ATTR_QMULT(_f_) \
static ssize_t _f_##_opts_qmult_show(struct config_item *item, \
char *page) \
{ \
struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item); \
unsigned qmult; \
\
mutex_lock(&opts->lock); \
qmult = gether_get_qmult(opts->net); \
mutex_unlock(&opts->lock); \
return sprintf(page, "%d\n", qmult); \
} \
\
static ssize_t _f_##_opts_qmult_store(struct config_item *item, \
const char *page, size_t len)\
{ \
struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item); \
u8 val; \
int ret; \
\
mutex_lock(&opts->lock); \
if (opts->refcnt) { \
ret = -EBUSY; \
goto out; \
} \
\
ret = kstrtou8(page, 0, &val); \
if (ret) \
goto out; \
\
gether_set_qmult(opts->net, val); \
ret = len; \
out: \
mutex_unlock(&opts->lock); \
return ret; \
} \
\
CONFIGFS_ATTR(_f_##_opts_, qmult)
#define USB_ETHERNET_CONFIGFS_ITEM_ATTR_IFNAME(_f_) \
static ssize_t _f_##_opts_ifname_show(struct config_item *item, \
char *page) \
{ \
struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item); \
int ret; \
\
mutex_lock(&opts->lock); \
ret = gether_get_ifname(opts->net, page, PAGE_SIZE); \
mutex_unlock(&opts->lock); \
\
return ret; \
} \
\
CONFIGFS_ATTR_RO(_f_##_opts_, ifname)
#define USB_ETHER_CONFIGFS_ITEM_ATTR_U8_RW(_f_, _n_) \
static ssize_t _f_##_opts_##_n_##_show(struct config_item *item,\
char *page) \
{ \
struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item); \
int ret; \
\
mutex_lock(&opts->lock); \
ret = sprintf(page, "%02x\n", opts->_n_); \
mutex_unlock(&opts->lock); \
\
return ret; \
} \
\
static ssize_t _f_##_opts_##_n_##_store(struct config_item *item,\
const char *page, \
size_t len) \
{ \
struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item); \
int ret = -EINVAL; \
u8 val; \
\
mutex_lock(&opts->lock); \
if (sscanf(page, "%02hhx", &val) > 0) { \
opts->_n_ = val; \
ret = len; \
} \
mutex_unlock(&opts->lock); \
\
return ret; \
} \
\
CONFIGFS_ATTR(_f_##_opts_, _n_)
#endif /* __U_ETHER_CONFIGFS_H */
|
