| | 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 || !skb->dev || |
| | 29 | !phy_is_default_hwtstamp(skb->dev->phydev)) |
| | 30 | return; |
| | 31 | |
| | 32 | type = classify(skb); |
| | 33 | if (type == PTP_CLASS_NONE) |
| | 34 | return; |
| | 35 | |
| | 36 | mii_ts = skb->dev->phydev->mii_ts; |
| | 37 | if (likely(mii_ts->txtstamp)) { |
| | 38 | clone = skb_clone_sk(skb); |
| | 39 | if (!clone) |
| | 40 | return; |
| | 41 | mii_ts->txtstamp(mii_ts, clone, type); |
| | 42 | } |
| | 43 | } |
| | 44 | EXPORT_SYMBOL_GPL(skb_clone_tx_timestamp); |
| | 45 | |
| | 46 | bool skb_defer_rx_timestamp(struct sk_buff *skb) |
| | 47 | { |
| | 48 | struct mii_timestamper *mii_ts; |
| | 49 | unsigned int type; |
| | 50 | |
| | 51 | if (!skb->dev || !phy_is_default_hwtstamp(skb->dev->phydev)) |
| | 52 | return false; |
| | 53 | |
| | 54 | if (skb_headroom(skb) < ETH_HLEN) |
| | 55 | return false; |
| | 56 | |
| | 57 | __skb_push(skb, ETH_HLEN); |
| | 58 | |
| | 59 | type = ptp_classify_raw(skb); |
| | 60 | |
| | 61 | __skb_pull(skb, ETH_HLEN); |
| | 62 | |
| | 63 | if (type == PTP_CLASS_NONE) |
| | 64 | return false; |
| | 65 | |
| | 66 | mii_ts = skb->dev->phydev->mii_ts; |
| | 67 | if (likely(mii_ts->rxtstamp)) |
| | 68 | return mii_ts->rxtstamp(mii_ts, skb, type); |
| | 69 | |
| | 70 | return false; |
| | 71 | } |
| | 72 | EXPORT_SYMBOL_GPL(skb_defer_rx_timestamp); |
projects / linux-2.6-block.git / blame_incremental