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net: Introduce a new MII time stamping interface.

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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>
This commit is contained in:
Richard Cochran 2019-12-25 18:16:15 -08:00 • committed by David S. Miller
parent 12d0efb9e6
commit 4715f65ffa
6 changed files with 106 additions and 58 deletions
Download patch file Download diff file Expand all files Collapse all files

20
net/core/timestamping.c
View file

@ -13,7 +13,7 @@
static unsigned int classify(const struct sk_buff *skb)
{
if (likely(skb->dev && skb->dev->phydev &&
skb->dev->phydev->drv))
skb->dev->phydev->mii_ts))
return ptp_classify_raw(skb);
else
return PTP_CLASS_NONE;
@ -21,7 +21,7 @@ static unsigned int classify(const struct sk_buff *skb)
void skb_clone_tx_timestamp(struct sk_buff *skb)
{
struct phy_device *phydev;
struct mii_timestamper *mii_ts;
struct sk_buff *clone;
unsigned int type;
@ -32,22 +32,22 @@ void skb_clone_tx_timestamp(struct sk_buff *skb)
if (type == PTP_CLASS_NONE)
return;
phydev = skb->dev->phydev;
if (likely(phydev->drv->txtstamp)) {
mii_ts = skb->dev->phydev->mii_ts;
if (likely(mii_ts->txtstamp)) {
clone = skb_clone_sk(skb);
if (!clone)
return;
phydev->drv->txtstamp(phydev, clone, type);
mii_ts->txtstamp(mii_ts, clone, type);
}
}
EXPORT_SYMBOL_GPL(skb_clone_tx_timestamp);
bool skb_defer_rx_timestamp(struct sk_buff *skb)
{
struct phy_device *phydev;
struct mii_timestamper *mii_ts;
unsigned int type;
if (!skb->dev || !skb->dev->phydev || !skb->dev->phydev->drv)
if (!skb->dev || !skb->dev->phydev || !skb->dev->phydev->mii_ts)
return false;
if (skb_headroom(skb) < ETH_HLEN)
@ -62,9 +62,9 @@ bool skb_defer_rx_timestamp(struct sk_buff *skb)
if (type == PTP_CLASS_NONE)
return false;
phydev = skb->dev->phydev;
if (likely(phydev->drv->rxtstamp))
return phydev->drv->rxtstamp(phydev, skb, type);
mii_ts = skb->dev->phydev->mii_ts;
if (likely(mii_ts->rxtstamp))
return mii_ts->rxtstamp(mii_ts, skb, type);
return false;
}