forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
71 lines
1.5 KiB
71 lines
1.5 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
|
/* |
|
* PTP 1588 clock support - support for timestamping in PHY devices |
|
* |
|
* Copyright (C) 2010 OMICRON electronics GmbH |
|
*/ |
|
#include <linux/errqueue.h> |
|
#include <linux/phy.h> |
|
#include <linux/ptp_classify.h> |
|
#include <linux/skbuff.h> |
|
#include <linux/export.h> |
|
|
|
static unsigned int classify(const struct sk_buff *skb) |
|
{ |
|
if (likely(skb->dev && skb->dev->phydev && |
|
skb->dev->phydev->mii_ts)) |
|
return ptp_classify_raw(skb); |
|
else |
|
return PTP_CLASS_NONE; |
|
} |
|
|
|
void skb_clone_tx_timestamp(struct sk_buff *skb) |
|
{ |
|
struct mii_timestamper *mii_ts; |
|
struct sk_buff *clone; |
|
unsigned int type; |
|
|
|
if (!skb->sk) |
|
return; |
|
|
|
type = classify(skb); |
|
if (type == PTP_CLASS_NONE) |
|
return; |
|
|
|
mii_ts = skb->dev->phydev->mii_ts; |
|
if (likely(mii_ts->txtstamp)) { |
|
clone = skb_clone_sk(skb); |
|
if (!clone) |
|
return; |
|
mii_ts->txtstamp(mii_ts, clone, type); |
|
} |
|
} |
|
EXPORT_SYMBOL_GPL(skb_clone_tx_timestamp); |
|
|
|
bool skb_defer_rx_timestamp(struct sk_buff *skb) |
|
{ |
|
struct mii_timestamper *mii_ts; |
|
unsigned int type; |
|
|
|
if (!skb->dev || !skb->dev->phydev || !skb->dev->phydev->mii_ts) |
|
return false; |
|
|
|
if (skb_headroom(skb) < ETH_HLEN) |
|
return false; |
|
|
|
__skb_push(skb, ETH_HLEN); |
|
|
|
type = ptp_classify_raw(skb); |
|
|
|
__skb_pull(skb, ETH_HLEN); |
|
|
|
if (type == PTP_CLASS_NONE) |
|
return false; |
|
|
|
mii_ts = skb->dev->phydev->mii_ts; |
|
if (likely(mii_ts->rxtstamp)) |
|
return mii_ts->rxtstamp(mii_ts, skb, type); |
|
|
|
return false; |
|
} |
|
EXPORT_SYMBOL_GPL(skb_defer_rx_timestamp);
|
|
|