1 // SPDX-License-Identifier: GPL-2.0-only
2
3 #include "netlink.h"
4 #include "common.h"
5 #include "bitset.h"
6
7 #define EEE_MODES_COUNT \
8 (sizeof_field(struct ethtool_eee, supported) * BITS_PER_BYTE)
9
10 struct eee_req_info {
11 struct ethnl_req_info base;
12 };
13
14 struct eee_reply_data {
15 struct ethnl_reply_data base;
16 struct ethtool_eee eee;
17 };
18
19 #define EEE_REPDATA(__reply_base) \
20 container_of(__reply_base, struct eee_reply_data, base)
21
22 const struct nla_policy ethnl_eee_get_policy[] = {
23 [ETHTOOL_A_EEE_HEADER] =
24 NLA_POLICY_NESTED(ethnl_header_policy),
25 };
26
eee_prepare_data(const struct ethnl_req_info * req_base,struct ethnl_reply_data * reply_base,struct genl_info * info)27 static int eee_prepare_data(const struct ethnl_req_info *req_base,
28 struct ethnl_reply_data *reply_base,
29 struct genl_info *info)
30 {
31 struct eee_reply_data *data = EEE_REPDATA(reply_base);
32 struct net_device *dev = reply_base->dev;
33 int ret;
34
35 if (!dev->ethtool_ops->get_eee)
36 return -EOPNOTSUPP;
37 ret = ethnl_ops_begin(dev);
38 if (ret < 0)
39 return ret;
40 ret = dev->ethtool_ops->get_eee(dev, &data->eee);
41 ethnl_ops_complete(dev);
42
43 return ret;
44 }
45
eee_reply_size(const struct ethnl_req_info * req_base,const struct ethnl_reply_data * reply_base)46 static int eee_reply_size(const struct ethnl_req_info *req_base,
47 const struct ethnl_reply_data *reply_base)
48 {
49 bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
50 const struct eee_reply_data *data = EEE_REPDATA(reply_base);
51 const struct ethtool_eee *eee = &data->eee;
52 int len = 0;
53 int ret;
54
55 BUILD_BUG_ON(sizeof(eee->advertised) * BITS_PER_BYTE !=
56 EEE_MODES_COUNT);
57 BUILD_BUG_ON(sizeof(eee->lp_advertised) * BITS_PER_BYTE !=
58 EEE_MODES_COUNT);
59
60 /* MODES_OURS */
61 ret = ethnl_bitset32_size(&eee->advertised, &eee->supported,
62 EEE_MODES_COUNT, link_mode_names, compact);
63 if (ret < 0)
64 return ret;
65 len += ret;
66 /* MODES_PEERS */
67 ret = ethnl_bitset32_size(&eee->lp_advertised, NULL,
68 EEE_MODES_COUNT, link_mode_names, compact);
69 if (ret < 0)
70 return ret;
71 len += ret;
72
73 len += nla_total_size(sizeof(u8)) + /* _EEE_ACTIVE */
74 nla_total_size(sizeof(u8)) + /* _EEE_ENABLED */
75 nla_total_size(sizeof(u8)) + /* _EEE_TX_LPI_ENABLED */
76 nla_total_size(sizeof(u32)); /* _EEE_TX_LPI_TIMER */
77
78 return len;
79 }
80
eee_fill_reply(struct sk_buff * skb,const struct ethnl_req_info * req_base,const struct ethnl_reply_data * reply_base)81 static int eee_fill_reply(struct sk_buff *skb,
82 const struct ethnl_req_info *req_base,
83 const struct ethnl_reply_data *reply_base)
84 {
85 bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
86 const struct eee_reply_data *data = EEE_REPDATA(reply_base);
87 const struct ethtool_eee *eee = &data->eee;
88 int ret;
89
90 ret = ethnl_put_bitset32(skb, ETHTOOL_A_EEE_MODES_OURS,
91 &eee->advertised, &eee->supported,
92 EEE_MODES_COUNT, link_mode_names, compact);
93 if (ret < 0)
94 return ret;
95 ret = ethnl_put_bitset32(skb, ETHTOOL_A_EEE_MODES_PEER,
96 &eee->lp_advertised, NULL, EEE_MODES_COUNT,
97 link_mode_names, compact);
98 if (ret < 0)
99 return ret;
100
101 if (nla_put_u8(skb, ETHTOOL_A_EEE_ACTIVE, !!eee->eee_active) ||
102 nla_put_u8(skb, ETHTOOL_A_EEE_ENABLED, !!eee->eee_enabled) ||
103 nla_put_u8(skb, ETHTOOL_A_EEE_TX_LPI_ENABLED,
104 !!eee->tx_lpi_enabled) ||
105 nla_put_u32(skb, ETHTOOL_A_EEE_TX_LPI_TIMER, eee->tx_lpi_timer))
106 return -EMSGSIZE;
107
108 return 0;
109 }
110
111 const struct ethnl_request_ops ethnl_eee_request_ops = {
112 .request_cmd = ETHTOOL_MSG_EEE_GET,
113 .reply_cmd = ETHTOOL_MSG_EEE_GET_REPLY,
114 .hdr_attr = ETHTOOL_A_EEE_HEADER,
115 .req_info_size = sizeof(struct eee_req_info),
116 .reply_data_size = sizeof(struct eee_reply_data),
117
118 .prepare_data = eee_prepare_data,
119 .reply_size = eee_reply_size,
120 .fill_reply = eee_fill_reply,
121 };
122
123 /* EEE_SET */
124
125 const struct nla_policy ethnl_eee_set_policy[] = {
126 [ETHTOOL_A_EEE_HEADER] =
127 NLA_POLICY_NESTED(ethnl_header_policy),
128 [ETHTOOL_A_EEE_MODES_OURS] = { .type = NLA_NESTED },
129 [ETHTOOL_A_EEE_ENABLED] = { .type = NLA_U8 },
130 [ETHTOOL_A_EEE_TX_LPI_ENABLED] = { .type = NLA_U8 },
131 [ETHTOOL_A_EEE_TX_LPI_TIMER] = { .type = NLA_U32 },
132 };
133
ethnl_set_eee(struct sk_buff * skb,struct genl_info * info)134 int ethnl_set_eee(struct sk_buff *skb, struct genl_info *info)
135 {
136 struct ethnl_req_info req_info = {};
137 struct nlattr **tb = info->attrs;
138 const struct ethtool_ops *ops;
139 struct ethtool_eee eee = {};
140 struct net_device *dev;
141 bool mod = false;
142 int ret;
143
144 ret = ethnl_parse_header_dev_get(&req_info,
145 tb[ETHTOOL_A_EEE_HEADER],
146 genl_info_net(info), info->extack,
147 true);
148 if (ret < 0)
149 return ret;
150 dev = req_info.dev;
151 ops = dev->ethtool_ops;
152 ret = -EOPNOTSUPP;
153 if (!ops->get_eee || !ops->set_eee)
154 goto out_dev;
155
156 rtnl_lock();
157 ret = ethnl_ops_begin(dev);
158 if (ret < 0)
159 goto out_rtnl;
160 ret = ops->get_eee(dev, &eee);
161 if (ret < 0)
162 goto out_ops;
163
164 ret = ethnl_update_bitset32(&eee.advertised, EEE_MODES_COUNT,
165 tb[ETHTOOL_A_EEE_MODES_OURS],
166 link_mode_names, info->extack, &mod);
167 if (ret < 0)
168 goto out_ops;
169 ethnl_update_bool32(&eee.eee_enabled, tb[ETHTOOL_A_EEE_ENABLED], &mod);
170 ethnl_update_bool32(&eee.tx_lpi_enabled,
171 tb[ETHTOOL_A_EEE_TX_LPI_ENABLED], &mod);
172 ethnl_update_bool32(&eee.tx_lpi_timer, tb[ETHTOOL_A_EEE_TX_LPI_TIMER],
173 &mod);
174 ret = 0;
175 if (!mod)
176 goto out_ops;
177
178 ret = dev->ethtool_ops->set_eee(dev, &eee);
179 if (ret < 0)
180 goto out_ops;
181 ethtool_notify(dev, ETHTOOL_MSG_EEE_NTF, NULL);
182
183 out_ops:
184 ethnl_ops_complete(dev);
185 out_rtnl:
186 rtnl_unlock();
187 out_dev:
188 dev_put(dev);
189 return ret;
190 }
191
