1 files changed, 88 insertions, 0 deletions
diff --git a/net/ethtool/ts.c b/net/ethtool/ts.c
new file mode 100644
index 000000000000..066cb06f4d0b
--- /dev/null
+++ b/net/ethtool/ts.c
@@ -0,0 +1,88 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include <linux/net_tstamp.h>
+#include <linux/phy.h>
+
+#include "netlink.h"
+#include "common.h"
+#include "bitset.h"
+
+struct ts_req_info {
+	struct ethnl_req_info		base;
+};
+
+struct ts_reply_data {
+	struct ethnl_reply_data		base;
+	enum timestamping_layer		ts_layer;
+};
+
+#define TS_REPDATA(__reply_base) \
+	container_of(__reply_base, struct ts_reply_data, base)
+
+/* TS_GET */
+const struct nla_policy ethnl_ts_get_policy[] = {
+	[ETHTOOL_A_TS_HEADER]		=
+		NLA_POLICY_NESTED(ethnl_header_policy),
+};
+
+static int ts_prepare_data(const struct ethnl_req_info *req_base,
+			   struct ethnl_reply_data *reply_base,
+			   const struct genl_info *info)
+{
+	struct ts_reply_data *data = TS_REPDATA(reply_base);
+	struct net_device *dev = reply_base->dev;
+	const struct ethtool_ops *ops = dev->ethtool_ops;
+	int ret;
+
+	ret = ethnl_ops_begin(dev);
+	if (ret < 0)
+		return ret;
+
+	if (phy_has_tsinfo(dev->phydev)) {
+		data->ts_layer = PHY_TIMESTAMPING;
+	} else if (ops->get_ts_info) {
+		struct ethtool_ts_info ts_info = {0};
+
+		ops->get_ts_info(dev, &ts_info);
+		if (ts_info.so_timestamping &
+		    SOF_TIMESTAMPING_HARDWARE_MASK)
+			data->ts_layer = MAC_TIMESTAMPING;
+
+		if (ts_info.so_timestamping &
+		    SOF_TIMESTAMPING_SOFTWARE_MASK)
+			data->ts_layer = SOFTWARE_TIMESTAMPING;
+	} else {
+		data->ts_layer = NO_TIMESTAMPING;
+	}
+
+	ethnl_ops_complete(dev);
+
+	return ret;
+}
+
+static int ts_reply_size(const struct ethnl_req_info *req_base,
+			 const struct ethnl_reply_data *reply_base)
+{
+	return nla_total_size(sizeof(u32));
+}
+
+static int ts_fill_reply(struct sk_buff *skb,
+			 const struct ethnl_req_info *req_base,
+			 const struct ethnl_reply_data *reply_base)
+{
+	struct ts_reply_data *data = TS_REPDATA(reply_base);
+
+	return nla_put_u32(skb, ETHTOOL_A_TS_LAYER, data->ts_layer);
+}
+
+const struct ethnl_request_ops ethnl_ts_request_ops = {
+	.request_cmd		= ETHTOOL_MSG_TS_GET,
+	.reply_cmd		= ETHTOOL_MSG_TS_GET_REPLY,
+	.hdr_attr		= ETHTOOL_A_TS_HEADER,
+	.req_info_size		= sizeof(struct ts_req_info),
+	.reply_data_size	= sizeof(struct ts_reply_data),
+
+	.prepare_data		= ts_prepare_data,
+	.reply_size		= ts_reply_size,
+	.fill_reply		= ts_fill_reply,
+};