1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | |
3 | #include <linux/ethtool.h> |
4 | |
5 | #include "netlink.h" |
6 | #include "common.h" |
7 | #include "bitset.h" |
8 | |
9 | struct module_req_info { |
10 | struct ethnl_req_info base; |
11 | }; |
12 | |
13 | struct module_reply_data { |
14 | struct ethnl_reply_data base; |
15 | struct ethtool_module_power_mode_params power; |
16 | }; |
17 | |
18 | #define MODULE_REPDATA(__reply_base) \ |
19 | container_of(__reply_base, struct module_reply_data, base) |
20 | |
21 | /* MODULE_GET */ |
22 | |
23 | const struct nla_policy ethnl_module_get_policy[ETHTOOL_A_MODULE_HEADER + 1] = { |
24 | [ETHTOOL_A_MODULE_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy), |
25 | }; |
26 | |
27 | static int module_get_power_mode(struct net_device *dev, |
28 | struct module_reply_data *data, |
29 | struct netlink_ext_ack *extack) |
30 | { |
31 | const struct ethtool_ops *ops = dev->ethtool_ops; |
32 | |
33 | if (!ops->get_module_power_mode) |
34 | return 0; |
35 | |
36 | return ops->get_module_power_mode(dev, &data->power, extack); |
37 | } |
38 | |
39 | static int module_prepare_data(const struct ethnl_req_info *req_base, |
40 | struct ethnl_reply_data *reply_base, |
41 | const struct genl_info *info) |
42 | { |
43 | struct module_reply_data *data = MODULE_REPDATA(reply_base); |
44 | struct net_device *dev = reply_base->dev; |
45 | int ret; |
46 | |
47 | ret = ethnl_ops_begin(dev); |
48 | if (ret < 0) |
49 | return ret; |
50 | |
51 | ret = module_get_power_mode(dev, data, extack: info->extack); |
52 | if (ret < 0) |
53 | goto out_complete; |
54 | |
55 | out_complete: |
56 | ethnl_ops_complete(dev); |
57 | return ret; |
58 | } |
59 | |
60 | static int module_reply_size(const struct ethnl_req_info *req_base, |
61 | const struct ethnl_reply_data *reply_base) |
62 | { |
63 | struct module_reply_data *data = MODULE_REPDATA(reply_base); |
64 | int len = 0; |
65 | |
66 | if (data->power.policy) |
67 | len += nla_total_size(payload: sizeof(u8)); /* _MODULE_POWER_MODE_POLICY */ |
68 | |
69 | if (data->power.mode) |
70 | len += nla_total_size(payload: sizeof(u8)); /* _MODULE_POWER_MODE */ |
71 | |
72 | return len; |
73 | } |
74 | |
75 | static int module_fill_reply(struct sk_buff *skb, |
76 | const struct ethnl_req_info *req_base, |
77 | const struct ethnl_reply_data *reply_base) |
78 | { |
79 | const struct module_reply_data *data = MODULE_REPDATA(reply_base); |
80 | |
81 | if (data->power.policy && |
82 | nla_put_u8(skb, attrtype: ETHTOOL_A_MODULE_POWER_MODE_POLICY, |
83 | value: data->power.policy)) |
84 | return -EMSGSIZE; |
85 | |
86 | if (data->power.mode && |
87 | nla_put_u8(skb, attrtype: ETHTOOL_A_MODULE_POWER_MODE, value: data->power.mode)) |
88 | return -EMSGSIZE; |
89 | |
90 | return 0; |
91 | } |
92 | |
93 | /* MODULE_SET */ |
94 | |
95 | const struct nla_policy ethnl_module_set_policy[ETHTOOL_A_MODULE_POWER_MODE_POLICY + 1] = { |
96 | [ETHTOOL_A_MODULE_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy), |
97 | [ETHTOOL_A_MODULE_POWER_MODE_POLICY] = |
98 | NLA_POLICY_RANGE(NLA_U8, ETHTOOL_MODULE_POWER_MODE_POLICY_HIGH, |
99 | ETHTOOL_MODULE_POWER_MODE_POLICY_AUTO), |
100 | }; |
101 | |
102 | static int |
103 | ethnl_set_module_validate(struct ethnl_req_info *req_info, |
104 | struct genl_info *info) |
105 | { |
106 | const struct ethtool_ops *ops = req_info->dev->ethtool_ops; |
107 | struct nlattr **tb = info->attrs; |
108 | |
109 | if (!tb[ETHTOOL_A_MODULE_POWER_MODE_POLICY]) |
110 | return 0; |
111 | |
112 | if (!ops->get_module_power_mode || !ops->set_module_power_mode) { |
113 | NL_SET_ERR_MSG_ATTR(info->extack, |
114 | tb[ETHTOOL_A_MODULE_POWER_MODE_POLICY], |
115 | "Setting power mode policy is not supported by this device" ); |
116 | return -EOPNOTSUPP; |
117 | } |
118 | |
119 | return 1; |
120 | } |
121 | |
122 | static int |
123 | ethnl_set_module(struct ethnl_req_info *req_info, struct genl_info *info) |
124 | { |
125 | struct ethtool_module_power_mode_params power = {}; |
126 | struct ethtool_module_power_mode_params power_new; |
127 | const struct ethtool_ops *ops; |
128 | struct net_device *dev = req_info->dev; |
129 | struct nlattr **tb = info->attrs; |
130 | int ret; |
131 | |
132 | ops = dev->ethtool_ops; |
133 | |
134 | power_new.policy = nla_get_u8(nla: tb[ETHTOOL_A_MODULE_POWER_MODE_POLICY]); |
135 | ret = ops->get_module_power_mode(dev, &power, info->extack); |
136 | if (ret < 0) |
137 | return ret; |
138 | |
139 | if (power_new.policy == power.policy) |
140 | return 0; |
141 | |
142 | ret = ops->set_module_power_mode(dev, &power_new, info->extack); |
143 | return ret < 0 ? ret : 1; |
144 | } |
145 | |
146 | const struct ethnl_request_ops ethnl_module_request_ops = { |
147 | .request_cmd = ETHTOOL_MSG_MODULE_GET, |
148 | .reply_cmd = ETHTOOL_MSG_MODULE_GET_REPLY, |
149 | .hdr_attr = ETHTOOL_A_MODULE_HEADER, |
150 | .req_info_size = sizeof(struct module_req_info), |
151 | .reply_data_size = sizeof(struct module_reply_data), |
152 | |
153 | .prepare_data = module_prepare_data, |
154 | .reply_size = module_reply_size, |
155 | .fill_reply = module_fill_reply, |
156 | |
157 | .set_validate = ethnl_set_module_validate, |
158 | .set = ethnl_set_module, |
159 | .set_ntf_cmd = ETHTOOL_MSG_MODULE_NTF, |
160 | }; |
161 | |