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
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
|
// SPDX-License-Identifier: GPL-2.0-only
#include <linux/phy.h>
#include <linux/ethtool_netlink.h>
#include "netlink.h"
#include "common.h"
/* 802.3 standard allows 100 meters for BaseT cables. However longer
* cables might work, depending on the quality of the cables and the
* PHY. So allow testing for up to 150 meters.
*/
#define MAX_CABLE_LENGTH_CM (150 * 100)
static const struct nla_policy
cable_test_act_policy[ETHTOOL_A_CABLE_TEST_MAX + 1] = {
[ETHTOOL_A_CABLE_TEST_UNSPEC] = { .type = NLA_REJECT },
[ETHTOOL_A_CABLE_TEST_HEADER] = { .type = NLA_NESTED },
};
static int ethnl_cable_test_started(struct phy_device *phydev, u8 cmd)
{
struct sk_buff *skb;
int err = -ENOMEM;
void *ehdr;
skb = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
if (!skb)
goto out;
ehdr = ethnl_bcastmsg_put(skb, cmd);
if (!ehdr) {
err = -EMSGSIZE;
goto out;
}
err = ethnl_fill_reply_header(skb, phydev->attached_dev,
ETHTOOL_A_CABLE_TEST_NTF_HEADER);
if (err)
goto out;
err = nla_put_u8(skb, ETHTOOL_A_CABLE_TEST_NTF_STATUS,
ETHTOOL_A_CABLE_TEST_NTF_STATUS_STARTED);
if (err)
goto out;
genlmsg_end(skb, ehdr);
return ethnl_multicast(skb, phydev->attached_dev);
out:
nlmsg_free(skb);
phydev_err(phydev, "%s: Error %pe\n", __func__, ERR_PTR(err));
return err;
}
int ethnl_act_cable_test(struct sk_buff *skb, struct genl_info *info)
{
struct nlattr *tb[ETHTOOL_A_CABLE_TEST_MAX + 1];
struct ethnl_req_info req_info = {};
const struct ethtool_phy_ops *ops;
struct net_device *dev;
int ret;
ret = nlmsg_parse(info->nlhdr, GENL_HDRLEN, tb,
ETHTOOL_A_CABLE_TEST_MAX,
cable_test_act_policy, info->extack);
if (ret < 0)
return ret;
ret = ethnl_parse_header_dev_get(&req_info,
tb[ETHTOOL_A_CABLE_TEST_HEADER],
genl_info_net(info), info->extack,
true);
if (ret < 0)
return ret;
dev = req_info.dev;
if (!dev->phydev) {
ret = -EOPNOTSUPP;
goto out_dev_put;
}
rtnl_lock();
ops = ethtool_phy_ops;
if (!ops || !ops->start_cable_test) {
ret = -EOPNOTSUPP;
goto out_rtnl;
}
ret = ethnl_ops_begin(dev);
if (ret < 0)
goto out_rtnl;
ret = ops->start_cable_test(dev->phydev, info->extack);
ethnl_ops_complete(dev);
if (!ret)
ethnl_cable_test_started(dev->phydev,
ETHTOOL_MSG_CABLE_TEST_NTF);
out_rtnl:
rtnl_unlock();
out_dev_put:
dev_put(dev);
return ret;
}
int ethnl_cable_test_alloc(struct phy_device *phydev, u8 cmd)
{
int err = -ENOMEM;
/* One TDR sample occupies 20 bytes. For a 150 meter cable,
* with four pairs, around 12K is needed.
*/
phydev->skb = genlmsg_new(SZ_16K, GFP_KERNEL);
if (!phydev->skb)
goto out;
phydev->ehdr = ethnl_bcastmsg_put(phydev->skb, cmd);
if (!phydev->ehdr) {
err = -EMSGSIZE;
goto out;
}
err = ethnl_fill_reply_header(phydev->skb, phydev->attached_dev,
ETHTOOL_A_CABLE_TEST_NTF_HEADER);
if (err)
goto out;
err = nla_put_u8(phydev->skb, ETHTOOL_A_CABLE_TEST_NTF_STATUS,
ETHTOOL_A_CABLE_TEST_NTF_STATUS_COMPLETED);
if (err)
goto out;
phydev->nest = nla_nest_start(phydev->skb,
ETHTOOL_A_CABLE_TEST_NTF_NEST);
if (!phydev->nest) {
err = -EMSGSIZE;
goto out;
}
return 0;
out:
nlmsg_free(phydev->skb);
phydev->skb = NULL;
return err;
}
EXPORT_SYMBOL_GPL(ethnl_cable_test_alloc);
void ethnl_cable_test_free(struct phy_device *phydev)
{
nlmsg_free(phydev->skb);
phydev->skb = NULL;
}
EXPORT_SYMBOL_GPL(ethnl_cable_test_free);
void ethnl_cable_test_finished(struct phy_device *phydev)
{
nla_nest_end(phydev->skb, phydev->nest);
genlmsg_end(phydev->skb, phydev->ehdr);
ethnl_multicast(phydev->skb, phydev->attached_dev);
}
EXPORT_SYMBOL_GPL(ethnl_cable_test_finished);
int ethnl_cable_test_result(struct phy_device *phydev, u8 pair, u8 result)
{
struct nlattr *nest;
int ret = -EMSGSIZE;
nest = nla_nest_start(phydev->skb, ETHTOOL_A_CABLE_NEST_RESULT);
if (!nest)
return -EMSGSIZE;
if (nla_put_u8(phydev->skb, ETHTOOL_A_CABLE_RESULT_PAIR, pair))
goto err;
if (nla_put_u8(phydev->skb, ETHTOOL_A_CABLE_RESULT_CODE, result))
goto err;
nla_nest_end(phydev->skb, nest);
return 0;
err:
nla_nest_cancel(phydev->skb, nest);
return ret;
}
EXPORT_SYMBOL_GPL(ethnl_cable_test_result);
int ethnl_cable_test_fault_length(struct phy_device *phydev, u8 pair, u32 cm)
{
struct nlattr *nest;
int ret = -EMSGSIZE;
nest = nla_nest_start(phydev->skb,
ETHTOOL_A_CABLE_NEST_FAULT_LENGTH);
if (!nest)
return -EMSGSIZE;
if (nla_put_u8(phydev->skb, ETHTOOL_A_CABLE_FAULT_LENGTH_PAIR, pair))
goto err;
if (nla_put_u32(phydev->skb, ETHTOOL_A_CABLE_FAULT_LENGTH_CM, cm))
goto err;
nla_nest_end(phydev->skb, nest);
return 0;
err:
nla_nest_cancel(phydev->skb, nest);
return ret;
}
EXPORT_SYMBOL_GPL(ethnl_cable_test_fault_length);
struct cable_test_tdr_req_info {
struct ethnl_req_info base;
};
static const struct nla_policy
cable_test_tdr_act_cfg_policy[ETHTOOL_A_CABLE_TEST_TDR_CFG_MAX + 1] = {
[ETHTOOL_A_CABLE_TEST_TDR_CFG_FIRST] = { .type = NLA_U32 },
[ETHTOOL_A_CABLE_TEST_TDR_CFG_LAST] = { .type = NLA_U32 },
[ETHTOOL_A_CABLE_TEST_TDR_CFG_STEP] = { .type = NLA_U32 },
[ETHTOOL_A_CABLE_TEST_TDR_CFG_PAIR] = { .type = NLA_U8 },
};
static const struct nla_policy
cable_test_tdr_act_policy[ETHTOOL_A_CABLE_TEST_TDR_MAX + 1] = {
[ETHTOOL_A_CABLE_TEST_TDR_UNSPEC] = { .type = NLA_REJECT },
[ETHTOOL_A_CABLE_TEST_TDR_HEADER] = { .type = NLA_NESTED },
[ETHTOOL_A_CABLE_TEST_TDR_CFG] = { .type = NLA_NESTED },
};
/* CABLE_TEST_TDR_ACT */
static int ethnl_act_cable_test_tdr_cfg(const struct nlattr *nest,
struct genl_info *info,
struct phy_tdr_config *cfg)
{
struct nlattr *tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_MAX + 1];
int ret;
cfg->first = 100;
cfg->step = 100;
cfg->last = MAX_CABLE_LENGTH_CM;
cfg->pair = PHY_PAIR_ALL;
if (!nest)
return 0;
ret = nla_parse_nested(tb, ETHTOOL_A_CABLE_TEST_TDR_CFG_MAX, nest,
cable_test_tdr_act_cfg_policy, info->extack);
if (ret < 0)
return ret;
if (tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_FIRST])
cfg->first = nla_get_u32(
tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_FIRST]);
if (tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_LAST])
cfg->last = nla_get_u32(tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_LAST]);
if (tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_STEP])
cfg->step = nla_get_u32(tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_STEP]);
if (tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_PAIR]) {
cfg->pair = nla_get_u8(tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_PAIR]);
if (cfg->pair > ETHTOOL_A_CABLE_PAIR_D) {
NL_SET_ERR_MSG_ATTR(
info->extack,
tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_PAIR],
"invalid pair parameter");
return -EINVAL;
}
}
if (cfg->first > MAX_CABLE_LENGTH_CM) {
NL_SET_ERR_MSG_ATTR(info->extack,
tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_FIRST],
"invalid first parameter");
return -EINVAL;
}
if (cfg->last > MAX_CABLE_LENGTH_CM) {
NL_SET_ERR_MSG_ATTR(info->extack,
tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_LAST],
"invalid last parameter");
return -EINVAL;
}
if (cfg->first > cfg->last) {
NL_SET_ERR_MSG(info->extack, "invalid first/last parameter");
return -EINVAL;
}
if (!cfg->step) {
NL_SET_ERR_MSG_ATTR(info->extack,
tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_STEP],
"invalid step parameter");
return -EINVAL;
}
if (cfg->step > (cfg->last - cfg->first)) {
NL_SET_ERR_MSG_ATTR(info->extack,
tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_STEP],
"step parameter too big");
return -EINVAL;
}
return 0;
}
int ethnl_act_cable_test_tdr(struct sk_buff *skb, struct genl_info *info)
{
struct nlattr *tb[ETHTOOL_A_CABLE_TEST_TDR_MAX + 1];
struct ethnl_req_info req_info = {};
const struct ethtool_phy_ops *ops;
struct phy_tdr_config cfg;
struct net_device *dev;
int ret;
ret = nlmsg_parse(info->nlhdr, GENL_HDRLEN, tb,
ETHTOOL_A_CABLE_TEST_TDR_MAX,
cable_test_tdr_act_policy, info->extack);
if (ret < 0)
return ret;
ret = ethnl_parse_header_dev_get(&req_info,
tb[ETHTOOL_A_CABLE_TEST_TDR_HEADER],
genl_info_net(info), info->extack,
true);
if (ret < 0)
return ret;
dev = req_info.dev;
if (!dev->phydev) {
ret = -EOPNOTSUPP;
goto out_dev_put;
}
ret = ethnl_act_cable_test_tdr_cfg(tb[ETHTOOL_A_CABLE_TEST_TDR_CFG],
info, &cfg);
if (ret)
goto out_dev_put;
rtnl_lock();
ops = ethtool_phy_ops;
if (!ops || !ops->start_cable_test_tdr) {
ret = -EOPNOTSUPP;
goto out_rtnl;
}
ret = ethnl_ops_begin(dev);
if (ret < 0)
goto out_rtnl;
ret = ops->start_cable_test_tdr(dev->phydev, info->extack, &cfg);
ethnl_ops_complete(dev);
if (!ret)
ethnl_cable_test_started(dev->phydev,
ETHTOOL_MSG_CABLE_TEST_TDR_NTF);
out_rtnl:
rtnl_unlock();
out_dev_put:
dev_put(dev);
return ret;
}
int ethnl_cable_test_amplitude(struct phy_device *phydev,
u8 pair, s16 mV)
{
struct nlattr *nest;
int ret = -EMSGSIZE;
nest = nla_nest_start(phydev->skb,
ETHTOOL_A_CABLE_TDR_NEST_AMPLITUDE);
if (!nest)
return -EMSGSIZE;
if (nla_put_u8(phydev->skb, ETHTOOL_A_CABLE_AMPLITUDE_PAIR, pair))
goto err;
if (nla_put_u16(phydev->skb, ETHTOOL_A_CABLE_AMPLITUDE_mV, mV))
goto err;
nla_nest_end(phydev->skb, nest);
return 0;
err:
nla_nest_cancel(phydev->skb, nest);
return ret;
}
EXPORT_SYMBOL_GPL(ethnl_cable_test_amplitude);
int ethnl_cable_test_pulse(struct phy_device *phydev, u16 mV)
{
struct nlattr *nest;
int ret = -EMSGSIZE;
nest = nla_nest_start(phydev->skb, ETHTOOL_A_CABLE_TDR_NEST_PULSE);
if (!nest)
return -EMSGSIZE;
if (nla_put_u16(phydev->skb, ETHTOOL_A_CABLE_PULSE_mV, mV))
goto err;
nla_nest_end(phydev->skb, nest);
return 0;
err:
nla_nest_cancel(phydev->skb, nest);
return ret;
}
EXPORT_SYMBOL_GPL(ethnl_cable_test_pulse);
int ethnl_cable_test_step(struct phy_device *phydev, u32 first, u32 last,
u32 step)
{
struct nlattr *nest;
int ret = -EMSGSIZE;
nest = nla_nest_start(phydev->skb, ETHTOOL_A_CABLE_TDR_NEST_STEP);
if (!nest)
return -EMSGSIZE;
if (nla_put_u32(phydev->skb, ETHTOOL_A_CABLE_STEP_FIRST_DISTANCE,
first))
goto err;
if (nla_put_u32(phydev->skb, ETHTOOL_A_CABLE_STEP_LAST_DISTANCE, last))
goto err;
if (nla_put_u32(phydev->skb, ETHTOOL_A_CABLE_STEP_STEP_DISTANCE, step))
goto err;
nla_nest_end(phydev->skb, nest);
return 0;
err:
nla_nest_cancel(phydev->skb, nest);
return ret;
}
EXPORT_SYMBOL_GPL(ethnl_cable_test_step);
|
