1 // SPDX-License-Identifier: GPL-2.0-only
6 struct pause_req_info {
7 struct ethnl_req_info base;
10 struct pause_reply_data {
11 struct ethnl_reply_data base;
12 struct ethtool_pauseparam pauseparam;
13 struct ethtool_pause_stats pausestat;
16 #define PAUSE_REPDATA(__reply_base) \
17 container_of(__reply_base, struct pause_reply_data, base)
19 const struct nla_policy ethnl_pause_get_policy[] = {
20 [ETHTOOL_A_PAUSE_HEADER] =
21 NLA_POLICY_NESTED(ethnl_header_policy_stats),
24 static int pause_prepare_data(const struct ethnl_req_info *req_base,
25 struct ethnl_reply_data *reply_base,
26 struct genl_info *info)
28 struct pause_reply_data *data = PAUSE_REPDATA(reply_base);
29 struct net_device *dev = reply_base->dev;
32 if (!dev->ethtool_ops->get_pauseparam)
35 ethtool_stats_init((u64 *)&data->pausestat,
36 sizeof(data->pausestat) / 8);
38 ret = ethnl_ops_begin(dev);
41 dev->ethtool_ops->get_pauseparam(dev, &data->pauseparam);
42 if (req_base->flags & ETHTOOL_FLAG_STATS &&
43 dev->ethtool_ops->get_pause_stats)
44 dev->ethtool_ops->get_pause_stats(dev, &data->pausestat);
45 ethnl_ops_complete(dev);
50 static int pause_reply_size(const struct ethnl_req_info *req_base,
51 const struct ethnl_reply_data *reply_base)
53 int n = nla_total_size(sizeof(u8)) + /* _PAUSE_AUTONEG */
54 nla_total_size(sizeof(u8)) + /* _PAUSE_RX */
55 nla_total_size(sizeof(u8)); /* _PAUSE_TX */
57 if (req_base->flags & ETHTOOL_FLAG_STATS)
58 n += nla_total_size(0) + /* _PAUSE_STATS */
59 nla_total_size_64bit(sizeof(u64)) *
60 (ETHTOOL_A_PAUSE_STAT_MAX - 2);
64 static int ethtool_put_stat(struct sk_buff *skb, u64 val, u16 attrtype,
67 if (val == ETHTOOL_STAT_NOT_SET)
69 if (nla_put_u64_64bit(skb, attrtype, val, padtype))
75 static int pause_put_stats(struct sk_buff *skb,
76 const struct ethtool_pause_stats *pause_stats)
78 const u16 pad = ETHTOOL_A_PAUSE_STAT_PAD;
81 nest = nla_nest_start(skb, ETHTOOL_A_PAUSE_STATS);
85 if (ethtool_put_stat(skb, pause_stats->tx_pause_frames,
86 ETHTOOL_A_PAUSE_STAT_TX_FRAMES, pad) ||
87 ethtool_put_stat(skb, pause_stats->rx_pause_frames,
88 ETHTOOL_A_PAUSE_STAT_RX_FRAMES, pad))
91 nla_nest_end(skb, nest);
95 nla_nest_cancel(skb, nest);
99 static int pause_fill_reply(struct sk_buff *skb,
100 const struct ethnl_req_info *req_base,
101 const struct ethnl_reply_data *reply_base)
103 const struct pause_reply_data *data = PAUSE_REPDATA(reply_base);
104 const struct ethtool_pauseparam *pauseparam = &data->pauseparam;
106 if (nla_put_u8(skb, ETHTOOL_A_PAUSE_AUTONEG, !!pauseparam->autoneg) ||
107 nla_put_u8(skb, ETHTOOL_A_PAUSE_RX, !!pauseparam->rx_pause) ||
108 nla_put_u8(skb, ETHTOOL_A_PAUSE_TX, !!pauseparam->tx_pause))
111 if (req_base->flags & ETHTOOL_FLAG_STATS &&
112 pause_put_stats(skb, &data->pausestat))
118 const struct ethnl_request_ops ethnl_pause_request_ops = {
119 .request_cmd = ETHTOOL_MSG_PAUSE_GET,
120 .reply_cmd = ETHTOOL_MSG_PAUSE_GET_REPLY,
121 .hdr_attr = ETHTOOL_A_PAUSE_HEADER,
122 .req_info_size = sizeof(struct pause_req_info),
123 .reply_data_size = sizeof(struct pause_reply_data),
125 .prepare_data = pause_prepare_data,
126 .reply_size = pause_reply_size,
127 .fill_reply = pause_fill_reply,
132 const struct nla_policy ethnl_pause_set_policy[] = {
133 [ETHTOOL_A_PAUSE_HEADER] =
134 NLA_POLICY_NESTED(ethnl_header_policy),
135 [ETHTOOL_A_PAUSE_AUTONEG] = { .type = NLA_U8 },
136 [ETHTOOL_A_PAUSE_RX] = { .type = NLA_U8 },
137 [ETHTOOL_A_PAUSE_TX] = { .type = NLA_U8 },
140 int ethnl_set_pause(struct sk_buff *skb, struct genl_info *info)
142 struct ethtool_pauseparam params = {};
143 struct ethnl_req_info req_info = {};
144 struct nlattr **tb = info->attrs;
145 const struct ethtool_ops *ops;
146 struct net_device *dev;
150 ret = ethnl_parse_header_dev_get(&req_info,
151 tb[ETHTOOL_A_PAUSE_HEADER],
152 genl_info_net(info), info->extack,
157 ops = dev->ethtool_ops;
159 if (!ops->get_pauseparam || !ops->set_pauseparam)
163 ret = ethnl_ops_begin(dev);
166 ops->get_pauseparam(dev, ¶ms);
168 ethnl_update_bool32(¶ms.autoneg, tb[ETHTOOL_A_PAUSE_AUTONEG], &mod);
169 ethnl_update_bool32(¶ms.rx_pause, tb[ETHTOOL_A_PAUSE_RX], &mod);
170 ethnl_update_bool32(¶ms.tx_pause, tb[ETHTOOL_A_PAUSE_TX], &mod);
175 ret = dev->ethtool_ops->set_pauseparam(dev, ¶ms);
178 ethtool_notify(dev, ETHTOOL_MSG_PAUSE_NTF, NULL);
181 ethnl_ops_complete(dev);