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https://github.com/torvalds/linux
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4715f65ffa
Currently the stack supports time stamping in PHY devices. However, there are newer, non-PHY devices that can snoop an MII bus and provide time stamps. In order to support such devices, this patch introduces a new interface to be used by both PHY and non-PHY devices. In addition, the one and only user of the old PHY time stamping API is converted to the new interface. Signed-off-by: Richard Cochran <richardcochran@gmail.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
72 lines
1.5 KiB
C
72 lines
1.5 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->mii_ts))
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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 mii_timestamper *mii_ts;
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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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mii_ts = skb->dev->phydev->mii_ts;
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if (likely(mii_ts->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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mii_ts->txtstamp(mii_ts, 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 mii_timestamper *mii_ts;
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unsigned int type;
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if (!skb->dev || !skb->dev->phydev || !skb->dev->phydev->mii_ts)
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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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mii_ts = skb->dev->phydev->mii_ts;
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if (likely(mii_ts->rxtstamp))
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return mii_ts->rxtstamp(mii_ts, 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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