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, &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(sizeof(u32));
51		len += nla_total_size(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, ETHTOOL_A_PHC_VCLOCKS_NUM, data->num) ||
68	    nla_put(skb, ETHTOOL_A_PHC_VCLOCKS_INDEX,
69		    sizeof(s32) * data->num, 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(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