projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| c1f19b51 RC |
1 | /* |
| 2 | * PTP 1588 clock support - support for timestamping in PHY devices | |
| 3 | * | |
| 4 | * Copyright (C) 2010 OMICRON electronics GmbH | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or modify | |
| 7 | * it under the terms of the GNU General Public License as published by | |
| 8 | * the Free Software Foundation; either version 2 of the License, or | |
| 9 | * (at your option) any later version. | |
| 10 | * | |
| 11 | * This program is distributed in the hope that it will be useful, | |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 14 | * GNU General Public License for more details. | |
| 15 | * | |
| 16 | * You should have received a copy of the GNU General Public License | |
| 17 | * along with this program; if not, write to the Free Software | |
| 18 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
| 19 | */ | |
| 20 | #include <linux/errqueue.h> | |
| 21 | #include <linux/phy.h> | |
| 22 | #include <linux/ptp_classify.h> | |
| 23 | #include <linux/skbuff.h> | |
| bc3b2d7f | 24 | #include <linux/export.h> |
| c1f19b51 | 25 | |
| 62ab0812 | 26 | static unsigned int classify(const struct sk_buff *skb) |
| c1f19b51 | 27 | { |
| e62d2df0 | 28 | if (likely(skb->dev && skb->dev->phydev && |
| c1f19b51 | 29 | skb->dev->phydev->drv)) |
| 164d8c66 | 30 | return ptp_classify_raw(skb); |
| c1f19b51 RC |
31 | else |
| 32 | return PTP_CLASS_NONE; | |
| 33 | } | |
| 34 | ||
| 35 | void skb_clone_tx_timestamp(struct sk_buff *skb) | |
| 36 | { | |
| 37 | struct phy_device *phydev; | |
| 38 | struct sk_buff *clone; | |
| c1f19b51 RC |
39 | unsigned int type; |
| 40 | ||
| 62bccb8c | 41 | if (!skb->sk) |
| c1f19b51 RC |
42 | return; |
| 43 | ||
| 44 | type = classify(skb); | |
| b9c701ed SS |
45 | if (type == PTP_CLASS_NONE) |
| 46 | return; | |
| 47 | ||
| 48 | phydev = skb->dev->phydev; | |
| 49 | if (likely(phydev->drv->txtstamp)) { | |
| 62bccb8c AD |
50 | clone = skb_clone_sk(skb); |
| 51 | if (!clone) | |
| b9c701ed | 52 | return; |
| b9c701ed | 53 | phydev->drv->txtstamp(phydev, clone, type); |
| c1f19b51 RC |
54 | } |
| 55 | } | |
| 1c17216e | 56 | EXPORT_SYMBOL_GPL(skb_clone_tx_timestamp); |
| c1f19b51 | 57 | |
| c1f19b51 RC |
58 | bool skb_defer_rx_timestamp(struct sk_buff *skb) |
| 59 | { | |
| 60 | struct phy_device *phydev; | |
| 61 | unsigned int type; | |
| 62 | ||
| 1007f59d AD |
63 | if (!skb->dev || !skb->dev->phydev || !skb->dev->phydev->drv) |
| 64 | return false; | |
| 65 | ||
| a19faf02 ED |
66 | if (skb_headroom(skb) < ETH_HLEN) |
| 67 | return false; | |
| 1007f59d | 68 | |
| a19faf02 | 69 | __skb_push(skb, ETH_HLEN); |
| c1f19b51 | 70 | |
| 1007f59d | 71 | type = ptp_classify_raw(skb); |
| c1f19b51 | 72 | |
| a19faf02 | 73 | __skb_pull(skb, ETH_HLEN); |
| c1f19b51 | 74 | |
| b9c701ed SS |
75 | if (type == PTP_CLASS_NONE) |
| 76 | return false; | |
| 77 | ||
| 78 | phydev = skb->dev->phydev; | |
| 79 | if (likely(phydev->drv->rxtstamp)) | |
| 80 | return phydev->drv->rxtstamp(phydev, skb, type); | |
| c1f19b51 RC |
81 | |
| 82 | return false; | |
| 83 | } | |
| 238442f6 | 84 | EXPORT_SYMBOL_GPL(skb_defer_rx_timestamp); |