1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright 2021 NXP
4  */
5 #include "netlink.h"
6 #include "common.h"
7 
8 struct phc_vclocks_req_info {
9 	struct ethnl_req_info		base;
10 };
11 
12 struct 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 
21 const struct nla_policy ethnl_phc_vclocks_get_policy[] = {
22 	[ETHTOOL_A_PHC_VCLOCKS_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy),
23 };
24 
phc_vclocks_prepare_data(const struct ethnl_req_info * req_base,struct ethnl_reply_data * reply_base,struct genl_info * info)25 static int phc_vclocks_prepare_data(const struct ethnl_req_info *req_base,
26 				    struct ethnl_reply_data *reply_base,
27 				    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 
phc_vclocks_reply_size(const struct ethnl_req_info * req_base,const struct ethnl_reply_data * reply_base)42 static 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 
phc_vclocks_fill_reply(struct sk_buff * skb,const struct ethnl_req_info * req_base,const struct ethnl_reply_data * reply_base)57 static 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 
phc_vclocks_cleanup_data(struct ethnl_reply_data * reply_base)75 static 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 
83 const 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