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74ba9207e1
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 675 mass ave cambridge ma 02139 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 441 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc) Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190520071858.739733335@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
72 lines
1.4 KiB
C
72 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* PTP 1588 clock support - support for timestamping in PHY devices
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*
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* Copyright (C) 2010 OMICRON electronics GmbH
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*/
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#include <linux/errqueue.h>
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#include <linux/phy.h>
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#include <linux/ptp_classify.h>
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#include <linux/skbuff.h>
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#include <linux/export.h>
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static unsigned int classify(const struct sk_buff *skb)
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{
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if (likely(skb->dev && skb->dev->phydev &&
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skb->dev->phydev->drv))
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return ptp_classify_raw(skb);
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else
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return PTP_CLASS_NONE;
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}
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void skb_clone_tx_timestamp(struct sk_buff *skb)
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{
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struct phy_device *phydev;
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struct sk_buff *clone;
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unsigned int type;
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if (!skb->sk)
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return;
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type = classify(skb);
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if (type == PTP_CLASS_NONE)
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return;
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phydev = skb->dev->phydev;
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if (likely(phydev->drv->txtstamp)) {
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clone = skb_clone_sk(skb);
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if (!clone)
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return;
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phydev->drv->txtstamp(phydev, clone, type);
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}
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}
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EXPORT_SYMBOL_GPL(skb_clone_tx_timestamp);
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bool skb_defer_rx_timestamp(struct sk_buff *skb)
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{
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struct phy_device *phydev;
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unsigned int type;
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if (!skb->dev || !skb->dev->phydev || !skb->dev->phydev->drv)
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return false;
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if (skb_headroom(skb) < ETH_HLEN)
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return false;
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__skb_push(skb, ETH_HLEN);
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type = ptp_classify_raw(skb);
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__skb_pull(skb, ETH_HLEN);
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if (type == PTP_CLASS_NONE)
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return false;
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phydev = skb->dev->phydev;
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if (likely(phydev->drv->rxtstamp))
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return phydev->drv->rxtstamp(phydev, skb, type);
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return false;
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}
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EXPORT_SYMBOL_GPL(skb_defer_rx_timestamp);
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