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,const 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 const 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 /* EEE_SET */
112
113 const struct nla_policy ethnl_eee_set_policy[] = {
114 [ETHTOOL_A_EEE_HEADER] =
115 NLA_POLICY_NESTED(ethnl_header_policy),
116 [ETHTOOL_A_EEE_MODES_OURS] = { .type = NLA_NESTED },
117 [ETHTOOL_A_EEE_ENABLED] = { .type = NLA_U8 },
118 [ETHTOOL_A_EEE_TX_LPI_ENABLED] = { .type = NLA_U8 },
119 [ETHTOOL_A_EEE_TX_LPI_TIMER] = { .type = NLA_U32 },
120 };
121
122 static int
ethnl_set_eee_validate(struct ethnl_req_info * req_info,struct genl_info * info)123 ethnl_set_eee_validate(struct ethnl_req_info *req_info, struct genl_info *info)
124 {
125 const struct ethtool_ops *ops = req_info->dev->ethtool_ops;
126
127 return ops->get_eee && ops->set_eee ? 1 : -EOPNOTSUPP;
128 }
129
130 static int
ethnl_set_eee(struct ethnl_req_info * req_info,struct genl_info * info)131 ethnl_set_eee(struct ethnl_req_info *req_info, struct genl_info *info)
132 {
133 struct net_device *dev = req_info->dev;
134 struct nlattr **tb = info->attrs;
135 struct ethtool_eee eee = {};
136 bool mod = false;
137 int ret;
138
139 ret = dev->ethtool_ops->get_eee(dev, &eee);
140 if (ret < 0)
141 return ret;
142
143 ret = ethnl_update_bitset32(&eee.advertised, EEE_MODES_COUNT,
144 tb[ETHTOOL_A_EEE_MODES_OURS],
145 link_mode_names, info->extack, &mod);
146 if (ret < 0)
147 return ret;
148 ethnl_update_bool32(&eee.eee_enabled, tb[ETHTOOL_A_EEE_ENABLED], &mod);
149 ethnl_update_bool32(&eee.tx_lpi_enabled,
150 tb[ETHTOOL_A_EEE_TX_LPI_ENABLED], &mod);
151 ethnl_update_u32(&eee.tx_lpi_timer, tb[ETHTOOL_A_EEE_TX_LPI_TIMER],
152 &mod);
153 if (!mod)
154 return 0;
155
156 ret = dev->ethtool_ops->set_eee(dev, &eee);
157 return ret < 0 ? ret : 1;
158 }
159
160 const struct ethnl_request_ops ethnl_eee_request_ops = {
161 .request_cmd = ETHTOOL_MSG_EEE_GET,
162 .reply_cmd = ETHTOOL_MSG_EEE_GET_REPLY,
163 .hdr_attr = ETHTOOL_A_EEE_HEADER,
164 .req_info_size = sizeof(struct eee_req_info),
165 .reply_data_size = sizeof(struct eee_reply_data),
166
167 .prepare_data = eee_prepare_data,
168 .reply_size = eee_reply_size,
169 .fill_reply = eee_fill_reply,
170
171 .set_validate = ethnl_set_eee_validate,
172 .set = ethnl_set_eee,
173 .set_ntf_cmd = ETHTOOL_MSG_EEE_NTF,
174 };
175