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1// SPDX-License-Identifier: GPL-2.0-only
2
3#include "netlink.h"
4#include "common.h"
5
6struct coalesce_req_info {
7 struct ethnl_req_info base;
8};
9
10struct coalesce_reply_data {
11 struct ethnl_reply_data base;
12 struct ethtool_coalesce coalesce;
13 u32 supported_params;
14};
15
16#define COALESCE_REPDATA(__reply_base) \
17 container_of(__reply_base, struct coalesce_reply_data, base)
18
19#define __SUPPORTED_OFFSET ETHTOOL_A_COALESCE_RX_USECS
20static u32 attr_to_mask(unsigned int attr_type)
21{
22 return BIT(attr_type - __SUPPORTED_OFFSET);
23}
24
25/* build time check that indices in ethtool_ops::supported_coalesce_params
26 * match corresponding attribute types with an offset
27 */
28#define __CHECK_SUPPORTED_OFFSET(x) \
29 static_assert((ETHTOOL_ ## x) == \
30 BIT((ETHTOOL_A_ ## x) - __SUPPORTED_OFFSET))
31__CHECK_SUPPORTED_OFFSET(COALESCE_RX_USECS);
32__CHECK_SUPPORTED_OFFSET(COALESCE_RX_MAX_FRAMES);
33__CHECK_SUPPORTED_OFFSET(COALESCE_RX_USECS_IRQ);
34__CHECK_SUPPORTED_OFFSET(COALESCE_RX_MAX_FRAMES_IRQ);
35__CHECK_SUPPORTED_OFFSET(COALESCE_TX_USECS);
36__CHECK_SUPPORTED_OFFSET(COALESCE_TX_MAX_FRAMES);
37__CHECK_SUPPORTED_OFFSET(COALESCE_TX_USECS_IRQ);
38__CHECK_SUPPORTED_OFFSET(COALESCE_TX_MAX_FRAMES_IRQ);
39__CHECK_SUPPORTED_OFFSET(COALESCE_STATS_BLOCK_USECS);
40__CHECK_SUPPORTED_OFFSET(COALESCE_USE_ADAPTIVE_RX);
41__CHECK_SUPPORTED_OFFSET(COALESCE_USE_ADAPTIVE_TX);
42__CHECK_SUPPORTED_OFFSET(COALESCE_PKT_RATE_LOW);
43__CHECK_SUPPORTED_OFFSET(COALESCE_RX_USECS_LOW);
44__CHECK_SUPPORTED_OFFSET(COALESCE_RX_MAX_FRAMES_LOW);
45__CHECK_SUPPORTED_OFFSET(COALESCE_TX_USECS_LOW);
46__CHECK_SUPPORTED_OFFSET(COALESCE_TX_MAX_FRAMES_LOW);
47__CHECK_SUPPORTED_OFFSET(COALESCE_PKT_RATE_HIGH);
48__CHECK_SUPPORTED_OFFSET(COALESCE_RX_USECS_HIGH);
49__CHECK_SUPPORTED_OFFSET(COALESCE_RX_MAX_FRAMES_HIGH);
50__CHECK_SUPPORTED_OFFSET(COALESCE_TX_USECS_HIGH);
51__CHECK_SUPPORTED_OFFSET(COALESCE_TX_MAX_FRAMES_HIGH);
52__CHECK_SUPPORTED_OFFSET(COALESCE_RATE_SAMPLE_INTERVAL);
53
54static const struct nla_policy
55coalesce_get_policy[ETHTOOL_A_COALESCE_MAX + 1] = {
56 [ETHTOOL_A_COALESCE_UNSPEC] = { .type = NLA_REJECT },
57 [ETHTOOL_A_COALESCE_HEADER] = { .type = NLA_NESTED },
58 [ETHTOOL_A_COALESCE_RX_USECS] = { .type = NLA_REJECT },
59 [ETHTOOL_A_COALESCE_RX_MAX_FRAMES] = { .type = NLA_REJECT },
60 [ETHTOOL_A_COALESCE_RX_USECS_IRQ] = { .type = NLA_REJECT },
61 [ETHTOOL_A_COALESCE_RX_MAX_FRAMES_IRQ] = { .type = NLA_REJECT },
62 [ETHTOOL_A_COALESCE_TX_USECS] = { .type = NLA_REJECT },
63 [ETHTOOL_A_COALESCE_TX_MAX_FRAMES] = { .type = NLA_REJECT },
64 [ETHTOOL_A_COALESCE_TX_USECS_IRQ] = { .type = NLA_REJECT },
65 [ETHTOOL_A_COALESCE_TX_MAX_FRAMES_IRQ] = { .type = NLA_REJECT },
66 [ETHTOOL_A_COALESCE_STATS_BLOCK_USECS] = { .type = NLA_REJECT },
67 [ETHTOOL_A_COALESCE_USE_ADAPTIVE_RX] = { .type = NLA_REJECT },
68 [ETHTOOL_A_COALESCE_USE_ADAPTIVE_TX] = { .type = NLA_REJECT },
69 [ETHTOOL_A_COALESCE_PKT_RATE_LOW] = { .type = NLA_REJECT },
70 [ETHTOOL_A_COALESCE_RX_USECS_LOW] = { .type = NLA_REJECT },
71 [ETHTOOL_A_COALESCE_RX_MAX_FRAMES_LOW] = { .type = NLA_REJECT },
72 [ETHTOOL_A_COALESCE_TX_USECS_LOW] = { .type = NLA_REJECT },
73 [ETHTOOL_A_COALESCE_TX_MAX_FRAMES_LOW] = { .type = NLA_REJECT },
74 [ETHTOOL_A_COALESCE_PKT_RATE_HIGH] = { .type = NLA_REJECT },
75 [ETHTOOL_A_COALESCE_RX_USECS_HIGH] = { .type = NLA_REJECT },
76 [ETHTOOL_A_COALESCE_RX_MAX_FRAMES_HIGH] = { .type = NLA_REJECT },
77 [ETHTOOL_A_COALESCE_TX_USECS_HIGH] = { .type = NLA_REJECT },
78 [ETHTOOL_A_COALESCE_TX_MAX_FRAMES_HIGH] = { .type = NLA_REJECT },
79 [ETHTOOL_A_COALESCE_RATE_SAMPLE_INTERVAL] = { .type = NLA_REJECT },
80};
81
82static int coalesce_prepare_data(const struct ethnl_req_info *req_base,
83 struct ethnl_reply_data *reply_base,
84 struct genl_info *info)
85{
86 struct coalesce_reply_data *data = COALESCE_REPDATA(reply_base);
87 struct net_device *dev = reply_base->dev;
88 int ret;
89
90 if (!dev->ethtool_ops->get_coalesce)
91 return -EOPNOTSUPP;
92 data->supported_params = dev->ethtool_ops->supported_coalesce_params;
93 ret = ethnl_ops_begin(dev);
94 if (ret < 0)
95 return ret;
96 ret = dev->ethtool_ops->get_coalesce(dev, &data->coalesce);
97 ethnl_ops_complete(dev);
98
99 return ret;
100}
101
102static int coalesce_reply_size(const struct ethnl_req_info *req_base,
103 const struct ethnl_reply_data *reply_base)
104{
105 return nla_total_size(sizeof(u32)) + /* _RX_USECS */
106 nla_total_size(sizeof(u32)) + /* _RX_MAX_FRAMES */
107 nla_total_size(sizeof(u32)) + /* _RX_USECS_IRQ */
108 nla_total_size(sizeof(u32)) + /* _RX_MAX_FRAMES_IRQ */
109 nla_total_size(sizeof(u32)) + /* _TX_USECS */
110 nla_total_size(sizeof(u32)) + /* _TX_MAX_FRAMES */
111 nla_total_size(sizeof(u32)) + /* _TX_USECS_IRQ */
112 nla_total_size(sizeof(u32)) + /* _TX_MAX_FRAMES_IRQ */
113 nla_total_size(sizeof(u32)) + /* _STATS_BLOCK_USECS */
114 nla_total_size(sizeof(u8)) + /* _USE_ADAPTIVE_RX */
115 nla_total_size(sizeof(u8)) + /* _USE_ADAPTIVE_TX */
116 nla_total_size(sizeof(u32)) + /* _PKT_RATE_LOW */
117 nla_total_size(sizeof(u32)) + /* _RX_USECS_LOW */
118 nla_total_size(sizeof(u32)) + /* _RX_MAX_FRAMES_LOW */
119 nla_total_size(sizeof(u32)) + /* _TX_USECS_LOW */
120 nla_total_size(sizeof(u32)) + /* _TX_MAX_FRAMES_LOW */
121 nla_total_size(sizeof(u32)) + /* _PKT_RATE_HIGH */
122 nla_total_size(sizeof(u32)) + /* _RX_USECS_HIGH */
123 nla_total_size(sizeof(u32)) + /* _RX_MAX_FRAMES_HIGH */
124 nla_total_size(sizeof(u32)) + /* _TX_USECS_HIGH */
125 nla_total_size(sizeof(u32)) + /* _TX_MAX_FRAMES_HIGH */
126 nla_total_size(sizeof(u32)); /* _RATE_SAMPLE_INTERVAL */
127}
128
129static bool coalesce_put_u32(struct sk_buff *skb, u16 attr_type, u32 val,
130 u32 supported_params)
131{
132 if (!val && !(supported_params & attr_to_mask(attr_type)))
133 return false;
134 return nla_put_u32(skb, attr_type, val);
135}
136
137static bool coalesce_put_bool(struct sk_buff *skb, u16 attr_type, u32 val,
138 u32 supported_params)
139{
140 if (!val && !(supported_params & attr_to_mask(attr_type)))
141 return false;
142 return nla_put_u8(skb, attr_type, !!val);
143}
144
145static int coalesce_fill_reply(struct sk_buff *skb,
146 const struct ethnl_req_info *req_base,
147 const struct ethnl_reply_data *reply_base)
148{
149 const struct coalesce_reply_data *data = COALESCE_REPDATA(reply_base);
150 const struct ethtool_coalesce *coal = &data->coalesce;
151 u32 supported = data->supported_params;
152
153 if (coalesce_put_u32(skb, ETHTOOL_A_COALESCE_RX_USECS,
154 coal->rx_coalesce_usecs, supported) ||
155 coalesce_put_u32(skb, ETHTOOL_A_COALESCE_RX_MAX_FRAMES,
156 coal->rx_max_coalesced_frames, supported) ||
157 coalesce_put_u32(skb, ETHTOOL_A_COALESCE_RX_USECS_IRQ,
158 coal->rx_coalesce_usecs_irq, supported) ||
159 coalesce_put_u32(skb, ETHTOOL_A_COALESCE_RX_MAX_FRAMES_IRQ,
160 coal->rx_max_coalesced_frames_irq, supported) ||
161 coalesce_put_u32(skb, ETHTOOL_A_COALESCE_TX_USECS,
162 coal->tx_coalesce_usecs, supported) ||
163 coalesce_put_u32(skb, ETHTOOL_A_COALESCE_TX_MAX_FRAMES,
164 coal->tx_max_coalesced_frames, supported) ||
165 coalesce_put_u32(skb, ETHTOOL_A_COALESCE_TX_USECS_IRQ,
166 coal->tx_coalesce_usecs_irq, supported) ||
167 coalesce_put_u32(skb, ETHTOOL_A_COALESCE_TX_MAX_FRAMES_IRQ,
168 coal->tx_max_coalesced_frames_irq, supported) ||
169 coalesce_put_u32(skb, ETHTOOL_A_COALESCE_STATS_BLOCK_USECS,
170 coal->stats_block_coalesce_usecs, supported) ||
171 coalesce_put_bool(skb, ETHTOOL_A_COALESCE_USE_ADAPTIVE_RX,
172 coal->use_adaptive_rx_coalesce, supported) ||
173 coalesce_put_bool(skb, ETHTOOL_A_COALESCE_USE_ADAPTIVE_TX,
174 coal->use_adaptive_tx_coalesce, supported) ||
175 coalesce_put_u32(skb, ETHTOOL_A_COALESCE_PKT_RATE_LOW,
176 coal->pkt_rate_low, supported) ||
177 coalesce_put_u32(skb, ETHTOOL_A_COALESCE_RX_USECS_LOW,
178 coal->rx_coalesce_usecs_low, supported) ||
179 coalesce_put_u32(skb, ETHTOOL_A_COALESCE_RX_MAX_FRAMES_LOW,
180 coal->rx_max_coalesced_frames_low, supported) ||
181 coalesce_put_u32(skb, ETHTOOL_A_COALESCE_TX_USECS_LOW,
182 coal->tx_coalesce_usecs_low, supported) ||
183 coalesce_put_u32(skb, ETHTOOL_A_COALESCE_TX_MAX_FRAMES_LOW,
184 coal->tx_max_coalesced_frames_low, supported) ||
185 coalesce_put_u32(skb, ETHTOOL_A_COALESCE_PKT_RATE_HIGH,
186 coal->pkt_rate_high, supported) ||
187 coalesce_put_u32(skb, ETHTOOL_A_COALESCE_RX_USECS_HIGH,
188 coal->rx_coalesce_usecs_high, supported) ||
189 coalesce_put_u32(skb, ETHTOOL_A_COALESCE_RX_MAX_FRAMES_HIGH,
190 coal->rx_max_coalesced_frames_high, supported) ||
191 coalesce_put_u32(skb, ETHTOOL_A_COALESCE_TX_USECS_HIGH,
192 coal->tx_coalesce_usecs_high, supported) ||
193 coalesce_put_u32(skb, ETHTOOL_A_COALESCE_TX_MAX_FRAMES_HIGH,
194 coal->tx_max_coalesced_frames_high, supported) ||
195 coalesce_put_u32(skb, ETHTOOL_A_COALESCE_RATE_SAMPLE_INTERVAL,
196 coal->rate_sample_interval, supported))
197 return -EMSGSIZE;
198
199 return 0;
200}
201
202const struct ethnl_request_ops ethnl_coalesce_request_ops = {
203 .request_cmd = ETHTOOL_MSG_COALESCE_GET,
204 .reply_cmd = ETHTOOL_MSG_COALESCE_GET_REPLY,
205 .hdr_attr = ETHTOOL_A_COALESCE_HEADER,
206 .max_attr = ETHTOOL_A_COALESCE_MAX,
207 .req_info_size = sizeof(struct coalesce_req_info),
208 .reply_data_size = sizeof(struct coalesce_reply_data),
209 .request_policy = coalesce_get_policy,
210
211 .prepare_data = coalesce_prepare_data,
212 .reply_size = coalesce_reply_size,
213 .fill_reply = coalesce_fill_reply,
214};
215
216/* COALESCE_SET */
217
218static const struct nla_policy
219coalesce_set_policy[ETHTOOL_A_COALESCE_MAX + 1] = {
220 [ETHTOOL_A_COALESCE_UNSPEC] = { .type = NLA_REJECT },
221 [ETHTOOL_A_COALESCE_HEADER] = { .type = NLA_NESTED },
222 [ETHTOOL_A_COALESCE_RX_USECS] = { .type = NLA_U32 },
223 [ETHTOOL_A_COALESCE_RX_MAX_FRAMES] = { .type = NLA_U32 },
224 [ETHTOOL_A_COALESCE_RX_USECS_IRQ] = { .type = NLA_U32 },
225 [ETHTOOL_A_COALESCE_RX_MAX_FRAMES_IRQ] = { .type = NLA_U32 },
226 [ETHTOOL_A_COALESCE_TX_USECS] = { .type = NLA_U32 },
227 [ETHTOOL_A_COALESCE_TX_MAX_FRAMES] = { .type = NLA_U32 },
228 [ETHTOOL_A_COALESCE_TX_USECS_IRQ] = { .type = NLA_U32 },
229 [ETHTOOL_A_COALESCE_TX_MAX_FRAMES_IRQ] = { .type = NLA_U32 },
230 [ETHTOOL_A_COALESCE_STATS_BLOCK_USECS] = { .type = NLA_U32 },
231 [ETHTOOL_A_COALESCE_USE_ADAPTIVE_RX] = { .type = NLA_U8 },
232 [ETHTOOL_A_COALESCE_USE_ADAPTIVE_TX] = { .type = NLA_U8 },
233 [ETHTOOL_A_COALESCE_PKT_RATE_LOW] = { .type = NLA_U32 },
234 [ETHTOOL_A_COALESCE_RX_USECS_LOW] = { .type = NLA_U32 },
235 [ETHTOOL_A_COALESCE_RX_MAX_FRAMES_LOW] = { .type = NLA_U32 },
236 [ETHTOOL_A_COALESCE_TX_USECS_LOW] = { .type = NLA_U32 },
237 [ETHTOOL_A_COALESCE_TX_MAX_FRAMES_LOW] = { .type = NLA_U32 },
238 [ETHTOOL_A_COALESCE_PKT_RATE_HIGH] = { .type = NLA_U32 },
239 [ETHTOOL_A_COALESCE_RX_USECS_HIGH] = { .type = NLA_U32 },
240 [ETHTOOL_A_COALESCE_RX_MAX_FRAMES_HIGH] = { .type = NLA_U32 },
241 [ETHTOOL_A_COALESCE_TX_USECS_HIGH] = { .type = NLA_U32 },
242 [ETHTOOL_A_COALESCE_TX_MAX_FRAMES_HIGH] = { .type = NLA_U32 },
243 [ETHTOOL_A_COALESCE_RATE_SAMPLE_INTERVAL] = { .type = NLA_U32 },
244};
245
246int ethnl_set_coalesce(struct sk_buff *skb, struct genl_info *info)
247{
248 struct nlattr *tb[ETHTOOL_A_COALESCE_MAX + 1];
249 struct ethtool_coalesce coalesce = {};
250 struct ethnl_req_info req_info = {};
251 const struct ethtool_ops *ops;
252 struct net_device *dev;
253 u32 supported_params;
254 bool mod = false;
255 int ret;
256 u16 a;
257
258 ret = nlmsg_parse(info->nlhdr, GENL_HDRLEN, tb,
259 ETHTOOL_A_COALESCE_MAX, coalesce_set_policy,
260 info->extack);
261 if (ret < 0)
262 return ret;
263 ret = ethnl_parse_header_dev_get(&req_info,
264 tb[ETHTOOL_A_COALESCE_HEADER],
265 genl_info_net(info), info->extack,
266 true);
267 if (ret < 0)
268 return ret;
269 dev = req_info.dev;
270 ops = dev->ethtool_ops;
271 ret = -EOPNOTSUPP;
272 if (!ops->get_coalesce || !ops->set_coalesce)
273 goto out_dev;
274
275 /* make sure that only supported parameters are present */
276 supported_params = ops->supported_coalesce_params;
277 for (a = ETHTOOL_A_COALESCE_RX_USECS; a < __ETHTOOL_A_COALESCE_CNT; a++)
278 if (tb[a] && !(supported_params & attr_to_mask(a))) {
279 ret = -EINVAL;
280 NL_SET_ERR_MSG_ATTR(info->extack, tb[a],
281 "cannot modify an unsupported parameter");
282 goto out_dev;
283 }
284
285 rtnl_lock();
286 ret = ethnl_ops_begin(dev);
287 if (ret < 0)
288 goto out_rtnl;
289 ret = ops->get_coalesce(dev, &coalesce);
290 if (ret < 0)
291 goto out_ops;
292
293 ethnl_update_u32(&coalesce.rx_coalesce_usecs,
294 tb[ETHTOOL_A_COALESCE_RX_USECS], &mod);
295 ethnl_update_u32(&coalesce.rx_max_coalesced_frames,
296 tb[ETHTOOL_A_COALESCE_RX_MAX_FRAMES], &mod);
297 ethnl_update_u32(&coalesce.rx_coalesce_usecs_irq,
298 tb[ETHTOOL_A_COALESCE_RX_USECS_IRQ], &mod);
299 ethnl_update_u32(&coalesce.rx_max_coalesced_frames_irq,
300 tb[ETHTOOL_A_COALESCE_RX_MAX_FRAMES_IRQ], &mod);
301 ethnl_update_u32(&coalesce.tx_coalesce_usecs,
302 tb[ETHTOOL_A_COALESCE_TX_USECS], &mod);
303 ethnl_update_u32(&coalesce.tx_max_coalesced_frames,
304 tb[ETHTOOL_A_COALESCE_TX_MAX_FRAMES], &mod);
305 ethnl_update_u32(&coalesce.tx_coalesce_usecs_irq,
306 tb[ETHTOOL_A_COALESCE_TX_USECS_IRQ], &mod);
307 ethnl_update_u32(&coalesce.tx_max_coalesced_frames_irq,
308 tb[ETHTOOL_A_COALESCE_TX_MAX_FRAMES_IRQ], &mod);
309 ethnl_update_u32(&coalesce.stats_block_coalesce_usecs,
310 tb[ETHTOOL_A_COALESCE_STATS_BLOCK_USECS], &mod);
311 ethnl_update_bool32(&coalesce.use_adaptive_rx_coalesce,
312 tb[ETHTOOL_A_COALESCE_USE_ADAPTIVE_RX], &mod);
313 ethnl_update_bool32(&coalesce.use_adaptive_tx_coalesce,
314 tb[ETHTOOL_A_COALESCE_USE_ADAPTIVE_TX], &mod);
315 ethnl_update_u32(&coalesce.pkt_rate_low,
316 tb[ETHTOOL_A_COALESCE_PKT_RATE_LOW], &mod);
317 ethnl_update_u32(&coalesce.rx_coalesce_usecs_low,
318 tb[ETHTOOL_A_COALESCE_RX_USECS_LOW], &mod);
319 ethnl_update_u32(&coalesce.rx_max_coalesced_frames_low,
320 tb[ETHTOOL_A_COALESCE_RX_MAX_FRAMES_LOW], &mod);
321 ethnl_update_u32(&coalesce.tx_coalesce_usecs_low,
322 tb[ETHTOOL_A_COALESCE_TX_USECS_LOW], &mod);
323 ethnl_update_u32(&coalesce.tx_max_coalesced_frames_low,
324 tb[ETHTOOL_A_COALESCE_TX_MAX_FRAMES_LOW], &mod);
325 ethnl_update_u32(&coalesce.pkt_rate_high,
326 tb[ETHTOOL_A_COALESCE_PKT_RATE_HIGH], &mod);
327 ethnl_update_u32(&coalesce.rx_coalesce_usecs_high,
328 tb[ETHTOOL_A_COALESCE_RX_USECS_HIGH], &mod);
329 ethnl_update_u32(&coalesce.rx_max_coalesced_frames_high,
330 tb[ETHTOOL_A_COALESCE_RX_MAX_FRAMES_HIGH], &mod);
331 ethnl_update_u32(&coalesce.tx_coalesce_usecs_high,
332 tb[ETHTOOL_A_COALESCE_TX_USECS_HIGH], &mod);
333 ethnl_update_u32(&coalesce.tx_max_coalesced_frames_high,
334 tb[ETHTOOL_A_COALESCE_TX_MAX_FRAMES_HIGH], &mod);
335 ethnl_update_u32(&coalesce.rate_sample_interval,
336 tb[ETHTOOL_A_COALESCE_RATE_SAMPLE_INTERVAL], &mod);
337 ret = 0;
338 if (!mod)
339 goto out_ops;
340
341 ret = dev->ethtool_ops->set_coalesce(dev, &coalesce);
342 if (ret < 0)
343 goto out_ops;
344 ethtool_notify(dev, ETHTOOL_MSG_COALESCE_NTF, NULL);
345
346out_ops:
347 ethnl_ops_complete(dev);
348out_rtnl:
349 rtnl_unlock();
350out_dev:
351 dev_put(dev);
352 return ret;
353}