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3d2b847f MK |
1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | ||
3 | #include "netlink.h" | |
4 | #include "common.h" | |
80660219 | 5 | #include <linux/phy.h> |
3d2b847f MK |
6 | |
7 | struct linkstate_req_info { | |
8 | struct ethnl_req_info base; | |
9 | }; | |
10 | ||
11 | struct linkstate_reply_data { | |
ecc31c60 AC |
12 | struct ethnl_reply_data base; |
13 | int link; | |
14 | int sqi; | |
15 | int sqi_max; | |
9a0f830f | 16 | struct ethtool_link_ext_stats link_stats; |
ecc31c60 AC |
17 | bool link_ext_state_provided; |
18 | struct ethtool_link_ext_state_info ethtool_link_ext_state_info; | |
3d2b847f MK |
19 | }; |
20 | ||
21 | #define LINKSTATE_REPDATA(__reply_base) \ | |
22 | container_of(__reply_base, struct linkstate_reply_data, base) | |
23 | ||
ff419afa | 24 | const struct nla_policy ethnl_linkstate_get_policy[] = { |
329d9c33 | 25 | [ETHTOOL_A_LINKSTATE_HEADER] = |
9a0f830f | 26 | NLA_POLICY_NESTED(ethnl_header_policy_stats), |
3d2b847f MK |
27 | }; |
28 | ||
80660219 OR |
29 | static int linkstate_get_sqi(struct net_device *dev) |
30 | { | |
31 | struct phy_device *phydev = dev->phydev; | |
32 | int ret; | |
33 | ||
34 | if (!phydev) | |
35 | return -EOPNOTSUPP; | |
36 | ||
37 | mutex_lock(&phydev->lock); | |
38 | if (!phydev->drv || !phydev->drv->get_sqi) | |
39 | ret = -EOPNOTSUPP; | |
40 | else | |
41 | ret = phydev->drv->get_sqi(phydev); | |
42 | mutex_unlock(&phydev->lock); | |
43 | ||
44 | return ret; | |
45 | } | |
46 | ||
47 | static int linkstate_get_sqi_max(struct net_device *dev) | |
48 | { | |
49 | struct phy_device *phydev = dev->phydev; | |
50 | int ret; | |
51 | ||
52 | if (!phydev) | |
53 | return -EOPNOTSUPP; | |
54 | ||
55 | mutex_lock(&phydev->lock); | |
56 | if (!phydev->drv || !phydev->drv->get_sqi_max) | |
57 | ret = -EOPNOTSUPP; | |
58 | else | |
59 | ret = phydev->drv->get_sqi_max(phydev); | |
60 | mutex_unlock(&phydev->lock); | |
61 | ||
62 | return ret; | |
ecc31c60 AC |
63 | }; |
64 | ||
65 | static int linkstate_get_link_ext_state(struct net_device *dev, | |
66 | struct linkstate_reply_data *data) | |
67 | { | |
68 | int err; | |
69 | ||
70 | if (!dev->ethtool_ops->get_link_ext_state) | |
71 | return -EOPNOTSUPP; | |
72 | ||
73 | err = dev->ethtool_ops->get_link_ext_state(dev, &data->ethtool_link_ext_state_info); | |
74 | if (err) | |
75 | return err; | |
76 | ||
77 | data->link_ext_state_provided = true; | |
78 | ||
79 | return 0; | |
80660219 OR |
80 | } |
81 | ||
3d2b847f MK |
82 | static int linkstate_prepare_data(const struct ethnl_req_info *req_base, |
83 | struct ethnl_reply_data *reply_base, | |
84 | struct genl_info *info) | |
85 | { | |
86 | struct linkstate_reply_data *data = LINKSTATE_REPDATA(reply_base); | |
87 | struct net_device *dev = reply_base->dev; | |
88 | int ret; | |
89 | ||
90 | ret = ethnl_ops_begin(dev); | |
91 | if (ret < 0) | |
92 | return ret; | |
93 | data->link = __ethtool_get_link(dev); | |
80660219 OR |
94 | |
95 | ret = linkstate_get_sqi(dev); | |
96 | if (ret < 0 && ret != -EOPNOTSUPP) | |
1ae71d99 | 97 | goto out; |
80660219 OR |
98 | data->sqi = ret; |
99 | ||
100 | ret = linkstate_get_sqi_max(dev); | |
101 | if (ret < 0 && ret != -EOPNOTSUPP) | |
1ae71d99 | 102 | goto out; |
80660219 OR |
103 | data->sqi_max = ret; |
104 | ||
ecc31c60 AC |
105 | if (dev->flags & IFF_UP) { |
106 | ret = linkstate_get_link_ext_state(dev, data); | |
107 | if (ret < 0 && ret != -EOPNOTSUPP && ret != -ENODATA) | |
108 | goto out; | |
109 | } | |
110 | ||
9a0f830f JK |
111 | ethtool_stats_init((u64 *)&data->link_stats, |
112 | sizeof(data->link_stats) / 8); | |
113 | ||
114 | if (req_base->flags & ETHTOOL_FLAG_STATS) { | |
115 | if (dev->phydev) | |
116 | data->link_stats.link_down_events = | |
117 | READ_ONCE(dev->phydev->link_down_events); | |
118 | ||
119 | if (dev->ethtool_ops->get_link_ext_stats) | |
120 | dev->ethtool_ops->get_link_ext_stats(dev, | |
121 | &data->link_stats); | |
122 | } | |
123 | ||
1ae71d99 MK |
124 | ret = 0; |
125 | out: | |
3d2b847f | 126 | ethnl_ops_complete(dev); |
1ae71d99 | 127 | return ret; |
3d2b847f MK |
128 | } |
129 | ||
130 | static int linkstate_reply_size(const struct ethnl_req_info *req_base, | |
131 | const struct ethnl_reply_data *reply_base) | |
132 | { | |
80660219 OR |
133 | struct linkstate_reply_data *data = LINKSTATE_REPDATA(reply_base); |
134 | int len; | |
135 | ||
136 | len = nla_total_size(sizeof(u8)) /* LINKSTATE_LINK */ | |
3d2b847f | 137 | + 0; |
80660219 OR |
138 | |
139 | if (data->sqi != -EOPNOTSUPP) | |
140 | len += nla_total_size(sizeof(u32)); | |
141 | ||
142 | if (data->sqi_max != -EOPNOTSUPP) | |
143 | len += nla_total_size(sizeof(u32)); | |
144 | ||
ecc31c60 AC |
145 | if (data->link_ext_state_provided) |
146 | len += nla_total_size(sizeof(u8)); /* LINKSTATE_EXT_STATE */ | |
147 | ||
148 | if (data->ethtool_link_ext_state_info.__link_ext_substate) | |
149 | len += nla_total_size(sizeof(u8)); /* LINKSTATE_EXT_SUBSTATE */ | |
150 | ||
9a0f830f JK |
151 | if (data->link_stats.link_down_events != ETHTOOL_STAT_NOT_SET) |
152 | len += nla_total_size(sizeof(u32)); | |
153 | ||
80660219 | 154 | return len; |
3d2b847f MK |
155 | } |
156 | ||
157 | static int linkstate_fill_reply(struct sk_buff *skb, | |
158 | const struct ethnl_req_info *req_base, | |
159 | const struct ethnl_reply_data *reply_base) | |
160 | { | |
161 | struct linkstate_reply_data *data = LINKSTATE_REPDATA(reply_base); | |
162 | ||
163 | if (data->link >= 0 && | |
164 | nla_put_u8(skb, ETHTOOL_A_LINKSTATE_LINK, !!data->link)) | |
165 | return -EMSGSIZE; | |
166 | ||
80660219 OR |
167 | if (data->sqi != -EOPNOTSUPP && |
168 | nla_put_u32(skb, ETHTOOL_A_LINKSTATE_SQI, data->sqi)) | |
169 | return -EMSGSIZE; | |
170 | ||
171 | if (data->sqi_max != -EOPNOTSUPP && | |
172 | nla_put_u32(skb, ETHTOOL_A_LINKSTATE_SQI_MAX, data->sqi_max)) | |
173 | return -EMSGSIZE; | |
174 | ||
ecc31c60 AC |
175 | if (data->link_ext_state_provided) { |
176 | if (nla_put_u8(skb, ETHTOOL_A_LINKSTATE_EXT_STATE, | |
177 | data->ethtool_link_ext_state_info.link_ext_state)) | |
178 | return -EMSGSIZE; | |
179 | ||
180 | if (data->ethtool_link_ext_state_info.__link_ext_substate && | |
181 | nla_put_u8(skb, ETHTOOL_A_LINKSTATE_EXT_SUBSTATE, | |
182 | data->ethtool_link_ext_state_info.__link_ext_substate)) | |
183 | return -EMSGSIZE; | |
184 | } | |
185 | ||
9a0f830f JK |
186 | if (data->link_stats.link_down_events != ETHTOOL_STAT_NOT_SET) |
187 | if (nla_put_u32(skb, ETHTOOL_A_LINKSTATE_EXT_DOWN_CNT, | |
188 | data->link_stats.link_down_events)) | |
189 | return -EMSGSIZE; | |
190 | ||
3d2b847f MK |
191 | return 0; |
192 | } | |
193 | ||
194 | const struct ethnl_request_ops ethnl_linkstate_request_ops = { | |
195 | .request_cmd = ETHTOOL_MSG_LINKSTATE_GET, | |
196 | .reply_cmd = ETHTOOL_MSG_LINKSTATE_GET_REPLY, | |
197 | .hdr_attr = ETHTOOL_A_LINKSTATE_HEADER, | |
3d2b847f MK |
198 | .req_info_size = sizeof(struct linkstate_req_info), |
199 | .reply_data_size = sizeof(struct linkstate_reply_data), | |
3d2b847f MK |
200 | |
201 | .prepare_data = linkstate_prepare_data, | |
202 | .reply_size = linkstate_reply_size, | |
203 | .fill_reply = linkstate_fill_reply, | |
204 | }; |