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
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
|
// SPDX-License-Identifier: GPL-2.0-only
#include <linux/ethtool.h>
#include "netlink.h"
#include "common.h"
struct eeprom_req_info {
struct ethnl_req_info base;
u32 offset;
u32 length;
u8 page;
u8 bank;
u8 i2c_address;
};
struct eeprom_reply_data {
struct ethnl_reply_data base;
u32 length;
u8 *data;
};
#define MODULE_EEPROM_REQINFO(__req_base) \
container_of(__req_base, struct eeprom_req_info, base)
#define MODULE_EEPROM_REPDATA(__reply_base) \
container_of(__reply_base, struct eeprom_reply_data, base)
static int fallback_set_params(struct eeprom_req_info *request,
struct ethtool_modinfo *modinfo,
struct ethtool_eeprom *eeprom)
{
u32 offset = request->offset;
u32 length = request->length;
if (request->page)
offset = request->page * ETH_MODULE_EEPROM_PAGE_LEN + offset;
if (modinfo->type == ETH_MODULE_SFF_8079 &&
request->i2c_address == 0x51)
offset += ETH_MODULE_EEPROM_PAGE_LEN * 2;
if (offset >= modinfo->eeprom_len)
return -EINVAL;
eeprom->cmd = ETHTOOL_GMODULEEEPROM;
eeprom->len = length;
eeprom->offset = offset;
return 0;
}
static int eeprom_fallback(struct eeprom_req_info *request,
struct eeprom_reply_data *reply,
struct genl_info *info)
{
struct net_device *dev = reply->base.dev;
struct ethtool_modinfo modinfo = {0};
struct ethtool_eeprom eeprom = {0};
u8 *data;
int err;
modinfo.cmd = ETHTOOL_GMODULEINFO;
err = ethtool_get_module_info_call(dev, &modinfo);
if (err < 0)
return err;
err = fallback_set_params(request, &modinfo, &eeprom);
if (err < 0)
return err;
data = kmalloc(eeprom.len, GFP_KERNEL);
if (!data)
return -ENOMEM;
err = ethtool_get_module_eeprom_call(dev, &eeprom, data);
if (err < 0)
goto err_out;
reply->data = data;
reply->length = eeprom.len;
return 0;
err_out:
kfree(data);
return err;
}
static int eeprom_prepare_data(const struct ethnl_req_info *req_base,
struct ethnl_reply_data *reply_base,
struct genl_info *info)
{
struct eeprom_reply_data *reply = MODULE_EEPROM_REPDATA(reply_base);
struct eeprom_req_info *request = MODULE_EEPROM_REQINFO(req_base);
struct ethtool_module_eeprom page_data = {0};
struct net_device *dev = reply_base->dev;
int ret;
if (!dev->ethtool_ops->get_module_eeprom_by_page)
return eeprom_fallback(request, reply, info);
page_data.offset = request->offset;
page_data.length = request->length;
page_data.i2c_address = request->i2c_address;
page_data.page = request->page;
page_data.bank = request->bank;
page_data.data = kmalloc(page_data.length, GFP_KERNEL);
if (!page_data.data)
return -ENOMEM;
ret = ethnl_ops_begin(dev);
if (ret)
goto err_free;
ret = dev->ethtool_ops->get_module_eeprom_by_page(dev, &page_data,
info->extack);
if (ret < 0)
goto err_ops;
reply->length = ret;
reply->data = page_data.data;
ethnl_ops_complete(dev);
return 0;
err_ops:
ethnl_ops_complete(dev);
err_free:
kfree(page_data.data);
return ret;
}
static int eeprom_parse_request(struct ethnl_req_info *req_info, struct nlattr **tb,
struct netlink_ext_ack *extack)
{
struct eeprom_req_info *request = MODULE_EEPROM_REQINFO(req_info);
if (!tb[ETHTOOL_A_MODULE_EEPROM_OFFSET] ||
!tb[ETHTOOL_A_MODULE_EEPROM_LENGTH] ||
!tb[ETHTOOL_A_MODULE_EEPROM_PAGE] ||
!tb[ETHTOOL_A_MODULE_EEPROM_I2C_ADDRESS])
return -EINVAL;
request->i2c_address = nla_get_u8(tb[ETHTOOL_A_MODULE_EEPROM_I2C_ADDRESS]);
request->offset = nla_get_u32(tb[ETHTOOL_A_MODULE_EEPROM_OFFSET]);
request->length = nla_get_u32(tb[ETHTOOL_A_MODULE_EEPROM_LENGTH]);
if (!request->length)
return -EINVAL;
/* The following set of conditions limit the API to only dump 1/2
* EEPROM page without crossing low page boundary located at offset 128.
* This means user may only request dumps of length limited to 128 from
* either low 128 bytes or high 128 bytes.
* For pages higher than 0 only high 128 bytes are accessible.
*/
request->page = nla_get_u8(tb[ETHTOOL_A_MODULE_EEPROM_PAGE]);
if (request->page && request->offset < ETH_MODULE_EEPROM_PAGE_LEN) {
NL_SET_ERR_MSG_ATTR(extack, tb[ETHTOOL_A_MODULE_EEPROM_PAGE],
"reading from lower half page is allowed for page 0 only");
return -EINVAL;
}
if (request->offset < ETH_MODULE_EEPROM_PAGE_LEN &&
request->offset + request->length > ETH_MODULE_EEPROM_PAGE_LEN) {
NL_SET_ERR_MSG_ATTR(extack, tb[ETHTOOL_A_MODULE_EEPROM_LENGTH],
"reading cross half page boundary is illegal");
return -EINVAL;
} else if (request->offset >= ETH_MODULE_EEPROM_PAGE_LEN * 2) {
NL_SET_ERR_MSG_ATTR(extack, tb[ETHTOOL_A_MODULE_EEPROM_OFFSET],
"offset is out of bounds");
return -EINVAL;
} else if (request->offset + request->length > ETH_MODULE_EEPROM_PAGE_LEN * 2) {
NL_SET_ERR_MSG_ATTR(extack, tb[ETHTOOL_A_MODULE_EEPROM_LENGTH],
"reading cross page boundary is illegal");
return -EINVAL;
}
if (tb[ETHTOOL_A_MODULE_EEPROM_BANK])
request->bank = nla_get_u8(tb[ETHTOOL_A_MODULE_EEPROM_BANK]);
return 0;
}
static int eeprom_reply_size(const struct ethnl_req_info *req_base,
const struct ethnl_reply_data *reply_base)
{
const struct eeprom_req_info *request = MODULE_EEPROM_REQINFO(req_base);
return nla_total_size(sizeof(u8) * request->length); /* _EEPROM_DATA */
}
static int eeprom_fill_reply(struct sk_buff *skb,
const struct ethnl_req_info *req_base,
const struct ethnl_reply_data *reply_base)
{
struct eeprom_reply_data *reply = MODULE_EEPROM_REPDATA(reply_base);
return nla_put(skb, ETHTOOL_A_MODULE_EEPROM_DATA, reply->length, reply->data);
}
static void eeprom_cleanup_data(struct ethnl_reply_data *reply_base)
{
struct eeprom_reply_data *reply = MODULE_EEPROM_REPDATA(reply_base);
kfree(reply->data);
}
const struct ethnl_request_ops ethnl_module_eeprom_request_ops = {
.request_cmd = ETHTOOL_MSG_MODULE_EEPROM_GET,
.reply_cmd = ETHTOOL_MSG_MODULE_EEPROM_GET_REPLY,
.hdr_attr = ETHTOOL_A_MODULE_EEPROM_HEADER,
.req_info_size = sizeof(struct eeprom_req_info),
.reply_data_size = sizeof(struct eeprom_reply_data),
.parse_request = eeprom_parse_request,
.prepare_data = eeprom_prepare_data,
.reply_size = eeprom_reply_size,
.fill_reply = eeprom_fill_reply,
.cleanup_data = eeprom_cleanup_data,
};
const struct nla_policy ethnl_module_eeprom_get_policy[] = {
[ETHTOOL_A_MODULE_EEPROM_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy),
[ETHTOOL_A_MODULE_EEPROM_OFFSET] = { .type = NLA_U32 },
[ETHTOOL_A_MODULE_EEPROM_LENGTH] = { .type = NLA_U32 },
[ETHTOOL_A_MODULE_EEPROM_PAGE] = { .type = NLA_U8 },
[ETHTOOL_A_MODULE_EEPROM_BANK] = { .type = NLA_U8 },
[ETHTOOL_A_MODULE_EEPROM_I2C_ADDRESS] =
NLA_POLICY_RANGE(NLA_U8, 0, ETH_MODULE_MAX_I2C_ADDRESS),
};
|
