1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright 2021 NXP
4 */
5#include "netlink.h"
6#include "common.h"
7
8struct phc_vclocks_req_info {
9 struct ethnl_req_info base;
10};
11
12struct phc_vclocks_reply_data {
13 struct ethnl_reply_data base;
14 int num;
15 int *index;
16};
17
18#define PHC_VCLOCKS_REPDATA(__reply_base) \
19 container_of(__reply_base, struct phc_vclocks_reply_data, base)
20
21const struct nla_policy ethnl_phc_vclocks_get_policy[] = {
22 [ETHTOOL_A_PHC_VCLOCKS_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy),
23};
24
25static int phc_vclocks_prepare_data(const struct ethnl_req_info *req_base,
26 struct ethnl_reply_data *reply_base,
27 const struct genl_info *info)
28{
29 struct phc_vclocks_reply_data *data = PHC_VCLOCKS_REPDATA(reply_base);
30 struct net_device *dev = reply_base->dev;
31 int ret;
32
33 ret = ethnl_ops_begin(dev);
34 if (ret < 0)
35 return ret;
36 data->num = ethtool_get_phc_vclocks(dev, vclock_index: &data->index);
37 ethnl_ops_complete(dev);
38
39 return ret;
40}
41
42static int phc_vclocks_reply_size(const struct ethnl_req_info *req_base,
43 const struct ethnl_reply_data *reply_base)
44{
45 const struct phc_vclocks_reply_data *data =
46 PHC_VCLOCKS_REPDATA(reply_base);
47 int len = 0;
48
49 if (data->num > 0) {
50 len += nla_total_size(payload: sizeof(u32));
51 len += nla_total_size(payload: sizeof(s32) * data->num);
52 }
53
54 return len;
55}
56
57static int phc_vclocks_fill_reply(struct sk_buff *skb,
58 const struct ethnl_req_info *req_base,
59 const struct ethnl_reply_data *reply_base)
60{
61 const struct phc_vclocks_reply_data *data =
62 PHC_VCLOCKS_REPDATA(reply_base);
63
64 if (data->num <= 0)
65 return 0;
66
67 if (nla_put_u32(skb, attrtype: ETHTOOL_A_PHC_VCLOCKS_NUM, value: data->num) ||
68 nla_put(skb, attrtype: ETHTOOL_A_PHC_VCLOCKS_INDEX,
69 attrlen: sizeof(s32) * data->num, data: data->index))
70 return -EMSGSIZE;
71
72 return 0;
73}
74
75static void phc_vclocks_cleanup_data(struct ethnl_reply_data *reply_base)
76{
77 const struct phc_vclocks_reply_data *data =
78 PHC_VCLOCKS_REPDATA(reply_base);
79
80 kfree(objp: data->index);
81}
82
83const struct ethnl_request_ops ethnl_phc_vclocks_request_ops = {
84 .request_cmd = ETHTOOL_MSG_PHC_VCLOCKS_GET,
85 .reply_cmd = ETHTOOL_MSG_PHC_VCLOCKS_GET_REPLY,
86 .hdr_attr = ETHTOOL_A_PHC_VCLOCKS_HEADER,
87 .req_info_size = sizeof(struct phc_vclocks_req_info),
88 .reply_data_size = sizeof(struct phc_vclocks_reply_data),
89
90 .prepare_data = phc_vclocks_prepare_data,
91 .reply_size = phc_vclocks_reply_size,
92 .fill_reply = phc_vclocks_fill_reply,
93 .cleanup_data = phc_vclocks_cleanup_data,
94};
95