forked from torvalds/linux
-
Notifications
You must be signed in to change notification settings - Fork 17
/
coalesce.c
379 lines (345 loc) · 15.4 KB
/
coalesce.c
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
// SPDX-License-Identifier: GPL-2.0-only
#include "netlink.h"
#include "common.h"
struct coalesce_req_info {
struct ethnl_req_info base;
};
struct coalesce_reply_data {
struct ethnl_reply_data base;
struct ethtool_coalesce coalesce;
struct kernel_ethtool_coalesce kernel_coalesce;
u32 supported_params;
};
#define COALESCE_REPDATA(__reply_base) \
container_of(__reply_base, struct coalesce_reply_data, base)
#define __SUPPORTED_OFFSET ETHTOOL_A_COALESCE_RX_USECS
static u32 attr_to_mask(unsigned int attr_type)
{
return BIT(attr_type - __SUPPORTED_OFFSET);
}
/* build time check that indices in ethtool_ops::supported_coalesce_params
* match corresponding attribute types with an offset
*/
#define __CHECK_SUPPORTED_OFFSET(x) \
static_assert((ETHTOOL_ ## x) == \
BIT((ETHTOOL_A_ ## x) - __SUPPORTED_OFFSET))
__CHECK_SUPPORTED_OFFSET(COALESCE_RX_USECS);
__CHECK_SUPPORTED_OFFSET(COALESCE_RX_MAX_FRAMES);
__CHECK_SUPPORTED_OFFSET(COALESCE_RX_USECS_IRQ);
__CHECK_SUPPORTED_OFFSET(COALESCE_RX_MAX_FRAMES_IRQ);
__CHECK_SUPPORTED_OFFSET(COALESCE_TX_USECS);
__CHECK_SUPPORTED_OFFSET(COALESCE_TX_MAX_FRAMES);
__CHECK_SUPPORTED_OFFSET(COALESCE_TX_USECS_IRQ);
__CHECK_SUPPORTED_OFFSET(COALESCE_TX_MAX_FRAMES_IRQ);
__CHECK_SUPPORTED_OFFSET(COALESCE_STATS_BLOCK_USECS);
__CHECK_SUPPORTED_OFFSET(COALESCE_USE_ADAPTIVE_RX);
__CHECK_SUPPORTED_OFFSET(COALESCE_USE_ADAPTIVE_TX);
__CHECK_SUPPORTED_OFFSET(COALESCE_PKT_RATE_LOW);
__CHECK_SUPPORTED_OFFSET(COALESCE_RX_USECS_LOW);
__CHECK_SUPPORTED_OFFSET(COALESCE_RX_MAX_FRAMES_LOW);
__CHECK_SUPPORTED_OFFSET(COALESCE_TX_USECS_LOW);
__CHECK_SUPPORTED_OFFSET(COALESCE_TX_MAX_FRAMES_LOW);
__CHECK_SUPPORTED_OFFSET(COALESCE_PKT_RATE_HIGH);
__CHECK_SUPPORTED_OFFSET(COALESCE_RX_USECS_HIGH);
__CHECK_SUPPORTED_OFFSET(COALESCE_RX_MAX_FRAMES_HIGH);
__CHECK_SUPPORTED_OFFSET(COALESCE_TX_USECS_HIGH);
__CHECK_SUPPORTED_OFFSET(COALESCE_TX_MAX_FRAMES_HIGH);
__CHECK_SUPPORTED_OFFSET(COALESCE_RATE_SAMPLE_INTERVAL);
const struct nla_policy ethnl_coalesce_get_policy[] = {
[ETHTOOL_A_COALESCE_HEADER] =
NLA_POLICY_NESTED(ethnl_header_policy),
};
static int coalesce_prepare_data(const struct ethnl_req_info *req_base,
struct ethnl_reply_data *reply_base,
const struct genl_info *info)
{
struct coalesce_reply_data *data = COALESCE_REPDATA(reply_base);
struct net_device *dev = reply_base->dev;
int ret;
if (!dev->ethtool_ops->get_coalesce)
return -EOPNOTSUPP;
data->supported_params = dev->ethtool_ops->supported_coalesce_params;
ret = ethnl_ops_begin(dev);
if (ret < 0)
return ret;
ret = dev->ethtool_ops->get_coalesce(dev, &data->coalesce,
&data->kernel_coalesce,
info->extack);
ethnl_ops_complete(dev);
return ret;
}
static int coalesce_reply_size(const struct ethnl_req_info *req_base,
const struct ethnl_reply_data *reply_base)
{
return nla_total_size(sizeof(u32)) + /* _RX_USECS */
nla_total_size(sizeof(u32)) + /* _RX_MAX_FRAMES */
nla_total_size(sizeof(u32)) + /* _RX_USECS_IRQ */
nla_total_size(sizeof(u32)) + /* _RX_MAX_FRAMES_IRQ */
nla_total_size(sizeof(u32)) + /* _TX_USECS */
nla_total_size(sizeof(u32)) + /* _TX_MAX_FRAMES */
nla_total_size(sizeof(u32)) + /* _TX_USECS_IRQ */
nla_total_size(sizeof(u32)) + /* _TX_MAX_FRAMES_IRQ */
nla_total_size(sizeof(u32)) + /* _STATS_BLOCK_USECS */
nla_total_size(sizeof(u8)) + /* _USE_ADAPTIVE_RX */
nla_total_size(sizeof(u8)) + /* _USE_ADAPTIVE_TX */
nla_total_size(sizeof(u32)) + /* _PKT_RATE_LOW */
nla_total_size(sizeof(u32)) + /* _RX_USECS_LOW */
nla_total_size(sizeof(u32)) + /* _RX_MAX_FRAMES_LOW */
nla_total_size(sizeof(u32)) + /* _TX_USECS_LOW */
nla_total_size(sizeof(u32)) + /* _TX_MAX_FRAMES_LOW */
nla_total_size(sizeof(u32)) + /* _PKT_RATE_HIGH */
nla_total_size(sizeof(u32)) + /* _RX_USECS_HIGH */
nla_total_size(sizeof(u32)) + /* _RX_MAX_FRAMES_HIGH */
nla_total_size(sizeof(u32)) + /* _TX_USECS_HIGH */
nla_total_size(sizeof(u32)) + /* _TX_MAX_FRAMES_HIGH */
nla_total_size(sizeof(u32)) + /* _RATE_SAMPLE_INTERVAL */
nla_total_size(sizeof(u8)) + /* _USE_CQE_MODE_TX */
nla_total_size(sizeof(u8)) + /* _USE_CQE_MODE_RX */
nla_total_size(sizeof(u32)) + /* _TX_AGGR_MAX_BYTES */
nla_total_size(sizeof(u32)) + /* _TX_AGGR_MAX_FRAMES */
nla_total_size(sizeof(u32)); /* _TX_AGGR_TIME_USECS */
}
static bool coalesce_put_u32(struct sk_buff *skb, u16 attr_type, u32 val,
u32 supported_params)
{
if (!val && !(supported_params & attr_to_mask(attr_type)))
return false;
return nla_put_u32(skb, attr_type, val);
}
static bool coalesce_put_bool(struct sk_buff *skb, u16 attr_type, u32 val,
u32 supported_params)
{
if (!val && !(supported_params & attr_to_mask(attr_type)))
return false;
return nla_put_u8(skb, attr_type, !!val);
}
static int coalesce_fill_reply(struct sk_buff *skb,
const struct ethnl_req_info *req_base,
const struct ethnl_reply_data *reply_base)
{
const struct coalesce_reply_data *data = COALESCE_REPDATA(reply_base);
const struct kernel_ethtool_coalesce *kcoal = &data->kernel_coalesce;
const struct ethtool_coalesce *coal = &data->coalesce;
u32 supported = data->supported_params;
if (coalesce_put_u32(skb, ETHTOOL_A_COALESCE_RX_USECS,
coal->rx_coalesce_usecs, supported) ||
coalesce_put_u32(skb, ETHTOOL_A_COALESCE_RX_MAX_FRAMES,
coal->rx_max_coalesced_frames, supported) ||
coalesce_put_u32(skb, ETHTOOL_A_COALESCE_RX_USECS_IRQ,
coal->rx_coalesce_usecs_irq, supported) ||
coalesce_put_u32(skb, ETHTOOL_A_COALESCE_RX_MAX_FRAMES_IRQ,
coal->rx_max_coalesced_frames_irq, supported) ||
coalesce_put_u32(skb, ETHTOOL_A_COALESCE_TX_USECS,
coal->tx_coalesce_usecs, supported) ||
coalesce_put_u32(skb, ETHTOOL_A_COALESCE_TX_MAX_FRAMES,
coal->tx_max_coalesced_frames, supported) ||
coalesce_put_u32(skb, ETHTOOL_A_COALESCE_TX_USECS_IRQ,
coal->tx_coalesce_usecs_irq, supported) ||
coalesce_put_u32(skb, ETHTOOL_A_COALESCE_TX_MAX_FRAMES_IRQ,
coal->tx_max_coalesced_frames_irq, supported) ||
coalesce_put_u32(skb, ETHTOOL_A_COALESCE_STATS_BLOCK_USECS,
coal->stats_block_coalesce_usecs, supported) ||
coalesce_put_bool(skb, ETHTOOL_A_COALESCE_USE_ADAPTIVE_RX,
coal->use_adaptive_rx_coalesce, supported) ||
coalesce_put_bool(skb, ETHTOOL_A_COALESCE_USE_ADAPTIVE_TX,
coal->use_adaptive_tx_coalesce, supported) ||
coalesce_put_u32(skb, ETHTOOL_A_COALESCE_PKT_RATE_LOW,
coal->pkt_rate_low, supported) ||
coalesce_put_u32(skb, ETHTOOL_A_COALESCE_RX_USECS_LOW,
coal->rx_coalesce_usecs_low, supported) ||
coalesce_put_u32(skb, ETHTOOL_A_COALESCE_RX_MAX_FRAMES_LOW,
coal->rx_max_coalesced_frames_low, supported) ||
coalesce_put_u32(skb, ETHTOOL_A_COALESCE_TX_USECS_LOW,
coal->tx_coalesce_usecs_low, supported) ||
coalesce_put_u32(skb, ETHTOOL_A_COALESCE_TX_MAX_FRAMES_LOW,
coal->tx_max_coalesced_frames_low, supported) ||
coalesce_put_u32(skb, ETHTOOL_A_COALESCE_PKT_RATE_HIGH,
coal->pkt_rate_high, supported) ||
coalesce_put_u32(skb, ETHTOOL_A_COALESCE_RX_USECS_HIGH,
coal->rx_coalesce_usecs_high, supported) ||
coalesce_put_u32(skb, ETHTOOL_A_COALESCE_RX_MAX_FRAMES_HIGH,
coal->rx_max_coalesced_frames_high, supported) ||
coalesce_put_u32(skb, ETHTOOL_A_COALESCE_TX_USECS_HIGH,
coal->tx_coalesce_usecs_high, supported) ||
coalesce_put_u32(skb, ETHTOOL_A_COALESCE_TX_MAX_FRAMES_HIGH,
coal->tx_max_coalesced_frames_high, supported) ||
coalesce_put_u32(skb, ETHTOOL_A_COALESCE_RATE_SAMPLE_INTERVAL,
coal->rate_sample_interval, supported) ||
coalesce_put_bool(skb, ETHTOOL_A_COALESCE_USE_CQE_MODE_TX,
kcoal->use_cqe_mode_tx, supported) ||
coalesce_put_bool(skb, ETHTOOL_A_COALESCE_USE_CQE_MODE_RX,
kcoal->use_cqe_mode_rx, supported) ||
coalesce_put_u32(skb, ETHTOOL_A_COALESCE_TX_AGGR_MAX_BYTES,
kcoal->tx_aggr_max_bytes, supported) ||
coalesce_put_u32(skb, ETHTOOL_A_COALESCE_TX_AGGR_MAX_FRAMES,
kcoal->tx_aggr_max_frames, supported) ||
coalesce_put_u32(skb, ETHTOOL_A_COALESCE_TX_AGGR_TIME_USECS,
kcoal->tx_aggr_time_usecs, supported))
return -EMSGSIZE;
return 0;
}
/* COALESCE_SET */
const struct nla_policy ethnl_coalesce_set_policy[] = {
[ETHTOOL_A_COALESCE_HEADER] =
NLA_POLICY_NESTED(ethnl_header_policy),
[ETHTOOL_A_COALESCE_RX_USECS] = { .type = NLA_U32 },
[ETHTOOL_A_COALESCE_RX_MAX_FRAMES] = { .type = NLA_U32 },
[ETHTOOL_A_COALESCE_RX_USECS_IRQ] = { .type = NLA_U32 },
[ETHTOOL_A_COALESCE_RX_MAX_FRAMES_IRQ] = { .type = NLA_U32 },
[ETHTOOL_A_COALESCE_TX_USECS] = { .type = NLA_U32 },
[ETHTOOL_A_COALESCE_TX_MAX_FRAMES] = { .type = NLA_U32 },
[ETHTOOL_A_COALESCE_TX_USECS_IRQ] = { .type = NLA_U32 },
[ETHTOOL_A_COALESCE_TX_MAX_FRAMES_IRQ] = { .type = NLA_U32 },
[ETHTOOL_A_COALESCE_STATS_BLOCK_USECS] = { .type = NLA_U32 },
[ETHTOOL_A_COALESCE_USE_ADAPTIVE_RX] = { .type = NLA_U8 },
[ETHTOOL_A_COALESCE_USE_ADAPTIVE_TX] = { .type = NLA_U8 },
[ETHTOOL_A_COALESCE_PKT_RATE_LOW] = { .type = NLA_U32 },
[ETHTOOL_A_COALESCE_RX_USECS_LOW] = { .type = NLA_U32 },
[ETHTOOL_A_COALESCE_RX_MAX_FRAMES_LOW] = { .type = NLA_U32 },
[ETHTOOL_A_COALESCE_TX_USECS_LOW] = { .type = NLA_U32 },
[ETHTOOL_A_COALESCE_TX_MAX_FRAMES_LOW] = { .type = NLA_U32 },
[ETHTOOL_A_COALESCE_PKT_RATE_HIGH] = { .type = NLA_U32 },
[ETHTOOL_A_COALESCE_RX_USECS_HIGH] = { .type = NLA_U32 },
[ETHTOOL_A_COALESCE_RX_MAX_FRAMES_HIGH] = { .type = NLA_U32 },
[ETHTOOL_A_COALESCE_TX_USECS_HIGH] = { .type = NLA_U32 },
[ETHTOOL_A_COALESCE_TX_MAX_FRAMES_HIGH] = { .type = NLA_U32 },
[ETHTOOL_A_COALESCE_RATE_SAMPLE_INTERVAL] = { .type = NLA_U32 },
[ETHTOOL_A_COALESCE_USE_CQE_MODE_TX] = NLA_POLICY_MAX(NLA_U8, 1),
[ETHTOOL_A_COALESCE_USE_CQE_MODE_RX] = NLA_POLICY_MAX(NLA_U8, 1),
[ETHTOOL_A_COALESCE_TX_AGGR_MAX_BYTES] = { .type = NLA_U32 },
[ETHTOOL_A_COALESCE_TX_AGGR_MAX_FRAMES] = { .type = NLA_U32 },
[ETHTOOL_A_COALESCE_TX_AGGR_TIME_USECS] = { .type = NLA_U32 },
};
static int
ethnl_set_coalesce_validate(struct ethnl_req_info *req_info,
struct genl_info *info)
{
const struct ethtool_ops *ops = req_info->dev->ethtool_ops;
struct nlattr **tb = info->attrs;
u32 supported_params;
u16 a;
if (!ops->get_coalesce || !ops->set_coalesce)
return -EOPNOTSUPP;
/* make sure that only supported parameters are present */
supported_params = ops->supported_coalesce_params;
for (a = ETHTOOL_A_COALESCE_RX_USECS; a < __ETHTOOL_A_COALESCE_CNT; a++)
if (tb[a] && !(supported_params & attr_to_mask(a))) {
NL_SET_ERR_MSG_ATTR(info->extack, tb[a],
"cannot modify an unsupported parameter");
return -EINVAL;
}
return 1;
}
static int
__ethnl_set_coalesce(struct ethnl_req_info *req_info, struct genl_info *info,
bool *dual_change)
{
struct kernel_ethtool_coalesce kernel_coalesce = {};
struct net_device *dev = req_info->dev;
struct ethtool_coalesce coalesce = {};
bool mod_mode = false, mod = false;
struct nlattr **tb = info->attrs;
int ret;
ret = dev->ethtool_ops->get_coalesce(dev, &coalesce, &kernel_coalesce,
info->extack);
if (ret < 0)
return ret;
/* Update values */
ethnl_update_u32(&coalesce.rx_coalesce_usecs,
tb[ETHTOOL_A_COALESCE_RX_USECS], &mod);
ethnl_update_u32(&coalesce.rx_max_coalesced_frames,
tb[ETHTOOL_A_COALESCE_RX_MAX_FRAMES], &mod);
ethnl_update_u32(&coalesce.rx_coalesce_usecs_irq,
tb[ETHTOOL_A_COALESCE_RX_USECS_IRQ], &mod);
ethnl_update_u32(&coalesce.rx_max_coalesced_frames_irq,
tb[ETHTOOL_A_COALESCE_RX_MAX_FRAMES_IRQ], &mod);
ethnl_update_u32(&coalesce.tx_coalesce_usecs,
tb[ETHTOOL_A_COALESCE_TX_USECS], &mod);
ethnl_update_u32(&coalesce.tx_max_coalesced_frames,
tb[ETHTOOL_A_COALESCE_TX_MAX_FRAMES], &mod);
ethnl_update_u32(&coalesce.tx_coalesce_usecs_irq,
tb[ETHTOOL_A_COALESCE_TX_USECS_IRQ], &mod);
ethnl_update_u32(&coalesce.tx_max_coalesced_frames_irq,
tb[ETHTOOL_A_COALESCE_TX_MAX_FRAMES_IRQ], &mod);
ethnl_update_u32(&coalesce.stats_block_coalesce_usecs,
tb[ETHTOOL_A_COALESCE_STATS_BLOCK_USECS], &mod);
ethnl_update_u32(&coalesce.pkt_rate_low,
tb[ETHTOOL_A_COALESCE_PKT_RATE_LOW], &mod);
ethnl_update_u32(&coalesce.rx_coalesce_usecs_low,
tb[ETHTOOL_A_COALESCE_RX_USECS_LOW], &mod);
ethnl_update_u32(&coalesce.rx_max_coalesced_frames_low,
tb[ETHTOOL_A_COALESCE_RX_MAX_FRAMES_LOW], &mod);
ethnl_update_u32(&coalesce.tx_coalesce_usecs_low,
tb[ETHTOOL_A_COALESCE_TX_USECS_LOW], &mod);
ethnl_update_u32(&coalesce.tx_max_coalesced_frames_low,
tb[ETHTOOL_A_COALESCE_TX_MAX_FRAMES_LOW], &mod);
ethnl_update_u32(&coalesce.pkt_rate_high,
tb[ETHTOOL_A_COALESCE_PKT_RATE_HIGH], &mod);
ethnl_update_u32(&coalesce.rx_coalesce_usecs_high,
tb[ETHTOOL_A_COALESCE_RX_USECS_HIGH], &mod);
ethnl_update_u32(&coalesce.rx_max_coalesced_frames_high,
tb[ETHTOOL_A_COALESCE_RX_MAX_FRAMES_HIGH], &mod);
ethnl_update_u32(&coalesce.tx_coalesce_usecs_high,
tb[ETHTOOL_A_COALESCE_TX_USECS_HIGH], &mod);
ethnl_update_u32(&coalesce.tx_max_coalesced_frames_high,
tb[ETHTOOL_A_COALESCE_TX_MAX_FRAMES_HIGH], &mod);
ethnl_update_u32(&coalesce.rate_sample_interval,
tb[ETHTOOL_A_COALESCE_RATE_SAMPLE_INTERVAL], &mod);
ethnl_update_u32(&kernel_coalesce.tx_aggr_max_bytes,
tb[ETHTOOL_A_COALESCE_TX_AGGR_MAX_BYTES], &mod);
ethnl_update_u32(&kernel_coalesce.tx_aggr_max_frames,
tb[ETHTOOL_A_COALESCE_TX_AGGR_MAX_FRAMES], &mod);
ethnl_update_u32(&kernel_coalesce.tx_aggr_time_usecs,
tb[ETHTOOL_A_COALESCE_TX_AGGR_TIME_USECS], &mod);
/* Update operation modes */
ethnl_update_bool32(&coalesce.use_adaptive_rx_coalesce,
tb[ETHTOOL_A_COALESCE_USE_ADAPTIVE_RX], &mod_mode);
ethnl_update_bool32(&coalesce.use_adaptive_tx_coalesce,
tb[ETHTOOL_A_COALESCE_USE_ADAPTIVE_TX], &mod_mode);
ethnl_update_u8(&kernel_coalesce.use_cqe_mode_tx,
tb[ETHTOOL_A_COALESCE_USE_CQE_MODE_TX], &mod_mode);
ethnl_update_u8(&kernel_coalesce.use_cqe_mode_rx,
tb[ETHTOOL_A_COALESCE_USE_CQE_MODE_RX], &mod_mode);
*dual_change = mod && mod_mode;
if (!mod && !mod_mode)
return 0;
ret = dev->ethtool_ops->set_coalesce(dev, &coalesce, &kernel_coalesce,
info->extack);
return ret < 0 ? ret : 1;
}
static int
ethnl_set_coalesce(struct ethnl_req_info *req_info, struct genl_info *info)
{
bool dual_change;
int err, ret;
/* SET_COALESCE may change operation mode and parameters in one call.
* Changing operation mode may cause the driver to reset the parameter
* values, and therefore ignore user input (driver does not know which
* parameters come from user and which are echoed back from ->get).
* To not complicate the drivers if user tries to change both the mode
* and parameters at once - call the driver twice.
*/
err = __ethnl_set_coalesce(req_info, info, &dual_change);
if (err < 0)
return err;
ret = err;
if (ret && dual_change) {
err = __ethnl_set_coalesce(req_info, info, &dual_change);
if (err < 0)
return err;
}
return ret;
}
const struct ethnl_request_ops ethnl_coalesce_request_ops = {
.request_cmd = ETHTOOL_MSG_COALESCE_GET,
.reply_cmd = ETHTOOL_MSG_COALESCE_GET_REPLY,
.hdr_attr = ETHTOOL_A_COALESCE_HEADER,
.req_info_size = sizeof(struct coalesce_req_info),
.reply_data_size = sizeof(struct coalesce_reply_data),
.prepare_data = coalesce_prepare_data,
.reply_size = coalesce_reply_size,
.fill_reply = coalesce_fill_reply,
.set_validate = ethnl_set_coalesce_validate,
.set = ethnl_set_coalesce,
.set_ntf_cmd = ETHTOOL_MSG_COALESCE_NTF,
};