1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * PTP 1588 clock support - support for timestamping in PHY devices
5 * Copyright (C) 2010 OMICRON electronics GmbH
7 #include <linux/errqueue.h>
9 #include <linux/ptp_classify.h>
10 #include <linux/skbuff.h>
11 #include <linux/export.h>
13 static unsigned int classify(const struct sk_buff *skb)
15 if (likely(skb->dev && skb->dev->phydev &&
16 skb->dev->phydev->mii_ts))
17 return ptp_classify_raw(skb);
19 return PTP_CLASS_NONE;
22 void skb_clone_tx_timestamp(struct sk_buff *skb)
24 struct mii_timestamper *mii_ts;
25 struct sk_buff *clone;
32 if (type == PTP_CLASS_NONE)
35 mii_ts = skb->dev->phydev->mii_ts;
36 if (likely(mii_ts->txtstamp)) {
37 clone = skb_clone_sk(skb);
40 mii_ts->txtstamp(mii_ts, clone, type);
43 EXPORT_SYMBOL_GPL(skb_clone_tx_timestamp);
45 bool skb_defer_rx_timestamp(struct sk_buff *skb)
47 struct mii_timestamper *mii_ts;
50 if (!skb->dev || !skb->dev->phydev || !skb->dev->phydev->mii_ts)
53 if (skb_headroom(skb) < ETH_HLEN)
56 __skb_push(skb, ETH_HLEN);
58 type = ptp_classify_raw(skb);
60 __skb_pull(skb, ETH_HLEN);
62 if (type == PTP_CLASS_NONE)
65 mii_ts = skb->dev->phydev->mii_ts;
66 if (likely(mii_ts->rxtstamp))
67 return mii_ts->rxtstamp(mii_ts, skb, type);
71 EXPORT_SYMBOL_GPL(skb_defer_rx_timestamp);