1 | // SPDX-License-Identifier: GPL-2.0-or-later |
---|---|
2 | /* |
3 | * PTP 1588 clock support - support for timestamping in PHY devices |
4 | * |
5 | * Copyright (C) 2010 OMICRON electronics GmbH |
6 | */ |
7 | #include <linux/errqueue.h> |
8 | #include <linux/phy.h> |
9 | #include <linux/ptp_classify.h> |
10 | #include <linux/skbuff.h> |
11 | #include <linux/export.h> |
12 | |
13 | static unsigned int classify(const struct sk_buff *skb) |
14 | { |
15 | if (likely(skb->dev && skb->dev->phydev && |
16 | skb->dev->phydev->mii_ts)) |
17 | return ptp_classify_raw(skb); |
18 | else |
19 | return PTP_CLASS_NONE; |
20 | } |
21 | |
22 | void skb_clone_tx_timestamp(struct sk_buff *skb) |
23 | { |
24 | struct mii_timestamper *mii_ts; |
25 | struct sk_buff *clone; |
26 | unsigned int type; |
27 | |
28 | if (!skb->sk) |
29 | return; |
30 | |
31 | type = classify(skb); |
32 | if (type == PTP_CLASS_NONE) |
33 | return; |
34 | |
35 | mii_ts = skb->dev->phydev->mii_ts; |
36 | if (likely(mii_ts->txtstamp)) { |
37 | clone = skb_clone_sk(skb); |
38 | if (!clone) |
39 | return; |
40 | mii_ts->txtstamp(mii_ts, clone, type); |
41 | } |
42 | } |
43 | EXPORT_SYMBOL_GPL(skb_clone_tx_timestamp); |
44 | |
45 | bool skb_defer_rx_timestamp(struct sk_buff *skb) |
46 | { |
47 | struct mii_timestamper *mii_ts; |
48 | unsigned int type; |
49 | |
50 | if (!skb->dev || !skb->dev->phydev || !skb->dev->phydev->mii_ts) |
51 | return false; |
52 | |
53 | if (skb_headroom(skb) < ETH_HLEN) |
54 | return false; |
55 | |
56 | __skb_push(skb, ETH_HLEN); |
57 | |
58 | type = ptp_classify_raw(skb); |
59 | |
60 | __skb_pull(skb, ETH_HLEN); |
61 | |
62 | if (type == PTP_CLASS_NONE) |
63 | return false; |
64 | |
65 | mii_ts = skb->dev->phydev->mii_ts; |
66 | if (likely(mii_ts->rxtstamp)) |
67 | return mii_ts->rxtstamp(mii_ts, skb, type); |
68 | |
69 | return false; |
70 | } |
71 | EXPORT_SYMBOL_GPL(skb_defer_rx_timestamp); |
72 |