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2b30f829 VO |
1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* | |
3 | * Copyright 2022-2023 NXP | |
4 | */ | |
5 | #include "common.h" | |
6 | #include "netlink.h" | |
7 | ||
8 | struct mm_req_info { | |
9 | struct ethnl_req_info base; | |
10 | }; | |
11 | ||
12 | struct mm_reply_data { | |
13 | struct ethnl_reply_data base; | |
14 | struct ethtool_mm_state state; | |
15 | struct ethtool_mm_stats stats; | |
16 | }; | |
17 | ||
18 | #define MM_REPDATA(__reply_base) \ | |
19 | container_of(__reply_base, struct mm_reply_data, base) | |
20 | ||
21 | #define ETHTOOL_MM_STAT_CNT \ | |
22 | (__ETHTOOL_A_MM_STAT_CNT - (ETHTOOL_A_MM_STAT_PAD + 1)) | |
23 | ||
24 | const struct nla_policy ethnl_mm_get_policy[ETHTOOL_A_MM_HEADER + 1] = { | |
25 | [ETHTOOL_A_MM_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy_stats), | |
26 | }; | |
27 | ||
28 | static int mm_prepare_data(const struct ethnl_req_info *req_base, | |
29 | struct ethnl_reply_data *reply_base, | |
30 | struct genl_info *info) | |
31 | { | |
32 | struct mm_reply_data *data = MM_REPDATA(reply_base); | |
33 | struct net_device *dev = reply_base->dev; | |
34 | const struct ethtool_ops *ops; | |
35 | int ret; | |
36 | ||
37 | ops = dev->ethtool_ops; | |
38 | ||
39 | if (!ops->get_mm) | |
40 | return -EOPNOTSUPP; | |
41 | ||
42 | ethtool_stats_init((u64 *)&data->stats, | |
43 | sizeof(data->stats) / sizeof(u64)); | |
44 | ||
45 | ret = ethnl_ops_begin(dev); | |
46 | if (ret < 0) | |
47 | return ret; | |
48 | ||
49 | ret = ops->get_mm(dev, &data->state); | |
50 | if (ret) | |
51 | goto out_complete; | |
52 | ||
53 | if (ops->get_mm_stats && (req_base->flags & ETHTOOL_FLAG_STATS)) | |
54 | ops->get_mm_stats(dev, &data->stats); | |
55 | ||
56 | out_complete: | |
57 | ethnl_ops_complete(dev); | |
58 | ||
ca8e4cbf | 59 | return ret; |
2b30f829 VO |
60 | } |
61 | ||
62 | static int mm_reply_size(const struct ethnl_req_info *req_base, | |
63 | const struct ethnl_reply_data *reply_base) | |
64 | { | |
65 | int len = 0; | |
66 | ||
67 | len += nla_total_size(sizeof(u8)); /* _MM_PMAC_ENABLED */ | |
68 | len += nla_total_size(sizeof(u8)); /* _MM_TX_ENABLED */ | |
69 | len += nla_total_size(sizeof(u8)); /* _MM_TX_ACTIVE */ | |
70 | len += nla_total_size(sizeof(u8)); /* _MM_VERIFY_ENABLED */ | |
71 | len += nla_total_size(sizeof(u8)); /* _MM_VERIFY_STATUS */ | |
72 | len += nla_total_size(sizeof(u32)); /* _MM_VERIFY_TIME */ | |
73 | len += nla_total_size(sizeof(u32)); /* _MM_MAX_VERIFY_TIME */ | |
74 | len += nla_total_size(sizeof(u32)); /* _MM_TX_MIN_FRAG_SIZE */ | |
75 | len += nla_total_size(sizeof(u32)); /* _MM_RX_MIN_FRAG_SIZE */ | |
76 | ||
77 | if (req_base->flags & ETHTOOL_FLAG_STATS) | |
78 | len += nla_total_size(0) + /* _MM_STATS */ | |
79 | nla_total_size_64bit(sizeof(u64)) * ETHTOOL_MM_STAT_CNT; | |
80 | ||
81 | return len; | |
82 | } | |
83 | ||
84 | static int mm_put_stat(struct sk_buff *skb, u64 val, u16 attrtype) | |
85 | { | |
86 | if (val == ETHTOOL_STAT_NOT_SET) | |
87 | return 0; | |
88 | if (nla_put_u64_64bit(skb, attrtype, val, ETHTOOL_A_MM_STAT_PAD)) | |
89 | return -EMSGSIZE; | |
90 | return 0; | |
91 | } | |
92 | ||
93 | static int mm_put_stats(struct sk_buff *skb, | |
94 | const struct ethtool_mm_stats *stats) | |
95 | { | |
96 | struct nlattr *nest; | |
97 | ||
98 | nest = nla_nest_start(skb, ETHTOOL_A_MM_STATS); | |
99 | if (!nest) | |
100 | return -EMSGSIZE; | |
101 | ||
102 | if (mm_put_stat(skb, stats->MACMergeFrameAssErrorCount, | |
103 | ETHTOOL_A_MM_STAT_REASSEMBLY_ERRORS) || | |
104 | mm_put_stat(skb, stats->MACMergeFrameSmdErrorCount, | |
105 | ETHTOOL_A_MM_STAT_SMD_ERRORS) || | |
106 | mm_put_stat(skb, stats->MACMergeFrameAssOkCount, | |
107 | ETHTOOL_A_MM_STAT_REASSEMBLY_OK) || | |
108 | mm_put_stat(skb, stats->MACMergeFragCountRx, | |
109 | ETHTOOL_A_MM_STAT_RX_FRAG_COUNT) || | |
110 | mm_put_stat(skb, stats->MACMergeFragCountTx, | |
111 | ETHTOOL_A_MM_STAT_TX_FRAG_COUNT) || | |
112 | mm_put_stat(skb, stats->MACMergeHoldCount, | |
113 | ETHTOOL_A_MM_STAT_HOLD_COUNT)) | |
114 | goto err_cancel; | |
115 | ||
116 | nla_nest_end(skb, nest); | |
117 | return 0; | |
118 | ||
119 | err_cancel: | |
120 | nla_nest_cancel(skb, nest); | |
121 | return -EMSGSIZE; | |
122 | } | |
123 | ||
124 | static int mm_fill_reply(struct sk_buff *skb, | |
125 | const struct ethnl_req_info *req_base, | |
126 | const struct ethnl_reply_data *reply_base) | |
127 | { | |
128 | const struct mm_reply_data *data = MM_REPDATA(reply_base); | |
129 | const struct ethtool_mm_state *state = &data->state; | |
130 | ||
131 | if (nla_put_u8(skb, ETHTOOL_A_MM_TX_ENABLED, state->tx_enabled) || | |
132 | nla_put_u8(skb, ETHTOOL_A_MM_TX_ACTIVE, state->tx_active) || | |
133 | nla_put_u8(skb, ETHTOOL_A_MM_PMAC_ENABLED, state->pmac_enabled) || | |
134 | nla_put_u8(skb, ETHTOOL_A_MM_VERIFY_ENABLED, state->verify_enabled) || | |
135 | nla_put_u8(skb, ETHTOOL_A_MM_VERIFY_STATUS, state->verify_status) || | |
136 | nla_put_u32(skb, ETHTOOL_A_MM_VERIFY_TIME, state->verify_time) || | |
137 | nla_put_u32(skb, ETHTOOL_A_MM_MAX_VERIFY_TIME, state->max_verify_time) || | |
138 | nla_put_u32(skb, ETHTOOL_A_MM_TX_MIN_FRAG_SIZE, state->tx_min_frag_size) || | |
139 | nla_put_u32(skb, ETHTOOL_A_MM_RX_MIN_FRAG_SIZE, state->rx_min_frag_size)) | |
140 | return -EMSGSIZE; | |
141 | ||
142 | if (req_base->flags & ETHTOOL_FLAG_STATS && | |
143 | mm_put_stats(skb, &data->stats)) | |
144 | return -EMSGSIZE; | |
145 | ||
146 | return 0; | |
147 | } | |
148 | ||
2b30f829 VO |
149 | const struct nla_policy ethnl_mm_set_policy[ETHTOOL_A_MM_MAX + 1] = { |
150 | [ETHTOOL_A_MM_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy), | |
151 | [ETHTOOL_A_MM_VERIFY_ENABLED] = NLA_POLICY_MAX(NLA_U8, 1), | |
152 | [ETHTOOL_A_MM_VERIFY_TIME] = NLA_POLICY_RANGE(NLA_U32, 1, 128), | |
153 | [ETHTOOL_A_MM_TX_ENABLED] = NLA_POLICY_MAX(NLA_U8, 1), | |
154 | [ETHTOOL_A_MM_PMAC_ENABLED] = NLA_POLICY_MAX(NLA_U8, 1), | |
155 | [ETHTOOL_A_MM_TX_MIN_FRAG_SIZE] = NLA_POLICY_RANGE(NLA_U32, 60, 252), | |
156 | }; | |
157 | ||
158 | static void mm_state_to_cfg(const struct ethtool_mm_state *state, | |
159 | struct ethtool_mm_cfg *cfg) | |
160 | { | |
161 | /* We could also compare state->verify_status against | |
162 | * ETHTOOL_MM_VERIFY_STATUS_DISABLED, but state->verify_enabled | |
163 | * is more like an administrative state which should be seen in | |
164 | * ETHTOOL_MSG_MM_GET replies. For example, a port with verification | |
165 | * disabled might be in the ETHTOOL_MM_VERIFY_STATUS_INITIAL | |
166 | * if it's down. | |
167 | */ | |
168 | cfg->verify_enabled = state->verify_enabled; | |
169 | cfg->verify_time = state->verify_time; | |
170 | cfg->tx_enabled = state->tx_enabled; | |
171 | cfg->pmac_enabled = state->pmac_enabled; | |
172 | cfg->tx_min_frag_size = state->tx_min_frag_size; | |
173 | } | |
174 | ||
04007961 JK |
175 | static int |
176 | ethnl_set_mm_validate(struct ethnl_req_info *req_info, struct genl_info *info) | |
177 | { | |
178 | const struct ethtool_ops *ops = req_info->dev->ethtool_ops; | |
179 | ||
180 | return ops->get_mm && ops->set_mm ? 1 : -EOPNOTSUPP; | |
181 | } | |
182 | ||
183 | static int ethnl_set_mm(struct ethnl_req_info *req_info, struct genl_info *info) | |
2b30f829 VO |
184 | { |
185 | struct netlink_ext_ack *extack = info->extack; | |
04007961 | 186 | struct net_device *dev = req_info->dev; |
2b30f829 VO |
187 | struct ethtool_mm_state state = {}; |
188 | struct nlattr **tb = info->attrs; | |
189 | struct ethtool_mm_cfg cfg = {}; | |
2b30f829 VO |
190 | bool mod = false; |
191 | int ret; | |
192 | ||
04007961 | 193 | ret = dev->ethtool_ops->get_mm(dev, &state); |
2b30f829 VO |
194 | if (ret) |
195 | return ret; | |
196 | ||
2b30f829 VO |
197 | mm_state_to_cfg(&state, &cfg); |
198 | ||
199 | ethnl_update_bool(&cfg.verify_enabled, tb[ETHTOOL_A_MM_VERIFY_ENABLED], | |
200 | &mod); | |
201 | ethnl_update_u32(&cfg.verify_time, tb[ETHTOOL_A_MM_VERIFY_TIME], &mod); | |
202 | ethnl_update_bool(&cfg.tx_enabled, tb[ETHTOOL_A_MM_TX_ENABLED], &mod); | |
203 | ethnl_update_bool(&cfg.pmac_enabled, tb[ETHTOOL_A_MM_PMAC_ENABLED], | |
04007961 | 204 | &mod); |
2b30f829 VO |
205 | ethnl_update_u32(&cfg.tx_min_frag_size, |
206 | tb[ETHTOOL_A_MM_TX_MIN_FRAG_SIZE], &mod); | |
207 | ||
208 | if (!mod) | |
04007961 | 209 | return 0; |
2b30f829 VO |
210 | |
211 | if (cfg.verify_time > state.max_verify_time) { | |
212 | NL_SET_ERR_MSG_ATTR(extack, tb[ETHTOOL_A_MM_VERIFY_TIME], | |
213 | "verifyTime exceeds device maximum"); | |
04007961 | 214 | return -ERANGE; |
2b30f829 VO |
215 | } |
216 | ||
35b288d6 VO |
217 | if (cfg.verify_enabled && !cfg.tx_enabled) { |
218 | NL_SET_ERR_MSG(extack, "Verification requires TX enabled"); | |
219 | return -EINVAL; | |
220 | } | |
221 | ||
222 | if (cfg.tx_enabled && !cfg.pmac_enabled) { | |
223 | NL_SET_ERR_MSG(extack, "TX enabled requires pMAC enabled"); | |
224 | return -EINVAL; | |
225 | } | |
226 | ||
04007961 JK |
227 | ret = dev->ethtool_ops->set_mm(dev, &cfg, extack); |
228 | return ret < 0 ? ret : 1; | |
229 | } | |
230 | ||
231 | const struct ethnl_request_ops ethnl_mm_request_ops = { | |
232 | .request_cmd = ETHTOOL_MSG_MM_GET, | |
233 | .reply_cmd = ETHTOOL_MSG_MM_GET_REPLY, | |
234 | .hdr_attr = ETHTOOL_A_MM_HEADER, | |
235 | .req_info_size = sizeof(struct mm_req_info), | |
236 | .reply_data_size = sizeof(struct mm_reply_data), | |
2b30f829 | 237 | |
04007961 JK |
238 | .prepare_data = mm_prepare_data, |
239 | .reply_size = mm_reply_size, | |
240 | .fill_reply = mm_fill_reply, | |
2b30f829 | 241 | |
04007961 JK |
242 | .set_validate = ethnl_set_mm_validate, |
243 | .set = ethnl_set_mm, | |
244 | .set_ntf_cmd = ETHTOOL_MSG_MM_NTF, | |
245 | }; | |
04692c90 VO |
246 | |
247 | /* Returns whether a given device supports the MAC merge layer | |
248 | * (has an eMAC and a pMAC). Must be called under rtnl_lock() and | |
249 | * ethnl_ops_begin(). | |
250 | */ | |
251 | bool __ethtool_dev_mm_supported(struct net_device *dev) | |
252 | { | |
253 | const struct ethtool_ops *ops = dev->ethtool_ops; | |
254 | struct ethtool_mm_state state = {}; | |
255 | int ret = -EOPNOTSUPP; | |
256 | ||
257 | if (ops && ops->get_mm) | |
258 | ret = ops->get_mm(dev, &state); | |
259 | ||
a00da30c | 260 | return !ret; |
04692c90 | 261 | } |
d54151aa VO |
262 | |
263 | bool ethtool_dev_mm_supported(struct net_device *dev) | |
264 | { | |
265 | const struct ethtool_ops *ops = dev->ethtool_ops; | |
266 | bool supported; | |
267 | int ret; | |
268 | ||
269 | ASSERT_RTNL(); | |
270 | ||
271 | if (!ops) | |
272 | return false; | |
273 | ||
274 | ret = ethnl_ops_begin(dev); | |
275 | if (ret < 0) | |
276 | return false; | |
277 | ||
278 | supported = __ethtool_dev_mm_supported(dev); | |
279 | ||
280 | ethnl_ops_complete(dev); | |
281 | ||
282 | return supported; | |
283 | } | |
284 | EXPORT_SYMBOL_GPL(ethtool_dev_mm_supported); |