1// SPDX-License-Identifier: GPL-2.0-only
  2
  3#include <linux/net_tstamp.h>
  4
  5#include "netlink.h"
  6#include "common.h"
  7#include "bitset.h"
  8
  9struct tsinfo_req_info {
 10	struct ethnl_req_info		base;
 11};
 12
 13struct tsinfo_reply_data {
 14	struct ethnl_reply_data		base;
 15	struct ethtool_ts_info		ts_info;
 16};
 17
 18#define TSINFO_REPDATA(__reply_base) \
 19	container_of(__reply_base, struct tsinfo_reply_data, base)
 20
 21const struct nla_policy ethnl_tsinfo_get_policy[] = {
 22	[ETHTOOL_A_TSINFO_HEADER]		=
 23		NLA_POLICY_NESTED(ethnl_header_policy),
 24};
 25
 26static int tsinfo_prepare_data(const struct ethnl_req_info *req_base,
 27			       struct ethnl_reply_data *reply_base,
 28			       struct genl_info *info)
 29{
 30	struct tsinfo_reply_data *data = TSINFO_REPDATA(reply_base);
 31	struct net_device *dev = reply_base->dev;
 32	int ret;
 33
 34	ret = ethnl_ops_begin(dev);
 35	if (ret < 0)
 36		return ret;
 37	ret = __ethtool_get_ts_info(dev, &data->ts_info);
 38	ethnl_ops_complete(dev);
 39
 40	return ret;
 41}
 42
 43static int tsinfo_reply_size(const struct ethnl_req_info *req_base,
 44			     const struct ethnl_reply_data *reply_base)
 45{
 46	const struct tsinfo_reply_data *data = TSINFO_REPDATA(reply_base);
 47	bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
 48	const struct ethtool_ts_info *ts_info = &data->ts_info;
 49	int len = 0;
 50	int ret;
 51
 52	BUILD_BUG_ON(__SOF_TIMESTAMPING_CNT > 32);
 53	BUILD_BUG_ON(__HWTSTAMP_TX_CNT > 32);
 54	BUILD_BUG_ON(__HWTSTAMP_FILTER_CNT > 32);
 55
 56	if (ts_info->so_timestamping) {
 57		ret = ethnl_bitset32_size(&ts_info->so_timestamping, NULL,
 58					  __SOF_TIMESTAMPING_CNT,
 59					  sof_timestamping_names, compact);
 60		if (ret < 0)
 61			return ret;
 62		len += ret;	/* _TSINFO_TIMESTAMPING */
 63	}
 64	if (ts_info->tx_types) {
 65		ret = ethnl_bitset32_size(&ts_info->tx_types, NULL,
 66					  __HWTSTAMP_TX_CNT,
 67					  ts_tx_type_names, compact);
 68		if (ret < 0)
 69			return ret;
 70		len += ret;	/* _TSINFO_TX_TYPES */
 71	}
 72	if (ts_info->rx_filters) {
 73		ret = ethnl_bitset32_size(&ts_info->rx_filters, NULL,
 74					  __HWTSTAMP_FILTER_CNT,
 75					  ts_rx_filter_names, compact);
 76		if (ret < 0)
 77			return ret;
 78		len += ret;	/* _TSINFO_RX_FILTERS */
 79	}
 80	if (ts_info->phc_index >= 0)
 81		len += nla_total_size(sizeof(u32));	/* _TSINFO_PHC_INDEX */
 82
 83	return len;
 84}
 85
 86static int tsinfo_fill_reply(struct sk_buff *skb,
 87			     const struct ethnl_req_info *req_base,
 88			     const struct ethnl_reply_data *reply_base)
 89{
 90	const struct tsinfo_reply_data *data = TSINFO_REPDATA(reply_base);
 91	bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
 92	const struct ethtool_ts_info *ts_info = &data->ts_info;
 93	int ret;
 94
 95	if (ts_info->so_timestamping) {
 96		ret = ethnl_put_bitset32(skb, ETHTOOL_A_TSINFO_TIMESTAMPING,
 97					 &ts_info->so_timestamping, NULL,
 98					 __SOF_TIMESTAMPING_CNT,
 99					 sof_timestamping_names, compact);
100		if (ret < 0)
101			return ret;
102	}
103	if (ts_info->tx_types) {
104		ret = ethnl_put_bitset32(skb, ETHTOOL_A_TSINFO_TX_TYPES,
105					 &ts_info->tx_types, NULL,
106					 __HWTSTAMP_TX_CNT,
107					 ts_tx_type_names, compact);
108		if (ret < 0)
109			return ret;
110	}
111	if (ts_info->rx_filters) {
112		ret = ethnl_put_bitset32(skb, ETHTOOL_A_TSINFO_RX_FILTERS,
113					 &ts_info->rx_filters, NULL,
114					 __HWTSTAMP_FILTER_CNT,
115					 ts_rx_filter_names, compact);
116		if (ret < 0)
117			return ret;
118	}
119	if (ts_info->phc_index >= 0 &&
120	    nla_put_u32(skb, ETHTOOL_A_TSINFO_PHC_INDEX, ts_info->phc_index))
121		return -EMSGSIZE;
122
123	return 0;
124}
125
126const struct ethnl_request_ops ethnl_tsinfo_request_ops = {
127	.request_cmd		= ETHTOOL_MSG_TSINFO_GET,
128	.reply_cmd		= ETHTOOL_MSG_TSINFO_GET_REPLY,
129	.hdr_attr		= ETHTOOL_A_TSINFO_HEADER,
130	.req_info_size		= sizeof(struct tsinfo_req_info),
131	.reply_data_size	= sizeof(struct tsinfo_reply_data),
132
133	.prepare_data		= tsinfo_prepare_data,
134	.reply_size		= tsinfo_reply_size,
135	.fill_reply		= tsinfo_fill_reply,
136};