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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
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58
include/linux/mii_timestamper.h Normal file
View File

@@ -0,0 +1,58 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Support for generic time stamping devices on MII buses.
* Copyright (C) 2018 Richard Cochran <richardcochran@gmail.com>
*/
#ifndef _LINUX_MII_TIMESTAMPER_H
#define _LINUX_MII_TIMESTAMPER_H
#include <linux/device.h>
#include <linux/ethtool.h>
#include <linux/skbuff.h>
struct phy_device;
/**
* struct mii_timestamper - Callback interface to MII time stamping devices.
*
* @rxtstamp: Requests a Rx timestamp for 'skb'. If the skb is accepted,
* the MII time stamping device promises to deliver it using
* netif_rx() as soon as a timestamp becomes available. One of
* the PTP_CLASS_ values is passed in 'type'. The function
* must return true if the skb is accepted for delivery.
*
* @txtstamp: Requests a Tx timestamp for 'skb'. The MII time stamping
* device promises to deliver it using skb_complete_tx_timestamp()
* as soon as a timestamp becomes available. One of the PTP_CLASS_
* values is passed in 'type'.
*
* @hwtstamp: Handles SIOCSHWTSTAMP ioctl for hardware time stamping.
*
* @link_state: Allows the device to respond to changes in the link
* state. The caller invokes this function while holding
* the phy_device mutex.
*
* @ts_info: Handles ethtool queries for hardware time stamping.
*
* Drivers for PHY time stamping devices should embed their
* mii_timestamper within a private structure, obtaining a reference
* to it using container_of().
*/
struct mii_timestamper {
bool (*rxtstamp)(struct mii_timestamper *mii_ts,
struct sk_buff *skb, int type);
void (*txtstamp)(struct mii_timestamper *mii_ts,
struct sk_buff *skb, int type);
int (*hwtstamp)(struct mii_timestamper *mii_ts,
struct ifreq *ifreq);
void (*link_state)(struct mii_timestamper *mii_ts,
struct phy_device *phydev);
int (*ts_info)(struct mii_timestamper *mii_ts,
struct ethtool_ts_info *ts_info);
};
#endif

41
include/linux/phy.h
View File

@@ -17,6 +17,7 @@
#include <linux/linkmode.h>
#include <linux/mdio.h>
#include <linux/mii.h>
#include <linux/mii_timestamper.h>
#include <linux/module.h>
#include <linux/timer.h>
#include <linux/workqueue.h>
@@ -441,6 +442,7 @@ struct phy_device {
struct sfp_bus *sfp_bus;
struct phylink *phylink;
struct net_device *attached_dev;
struct mii_timestamper *mii_ts;
u8 mdix;
u8 mdix_ctrl;
@@ -546,29 +548,6 @@ struct phy_driver {
*/
int (*match_phy_device)(struct phy_device *phydev);
/* Handles ethtool queries for hardware time stamping. */
int (*ts_info)(struct phy_device *phydev, struct ethtool_ts_info *ti);
/* Handles SIOCSHWTSTAMP ioctl for hardware time stamping. */
int (*hwtstamp)(struct phy_device *phydev, struct ifreq *ifr);
/*
* Requests a Rx timestamp for 'skb'. If the skb is accepted,
* the phy driver promises to deliver it using netif_rx() as
* soon as a timestamp becomes available. One of the
* PTP_CLASS_ values is passed in 'type'. The function must
* return true if the skb is accepted for delivery.
*/
bool (*rxtstamp)(struct phy_device *dev, struct sk_buff *skb, int type);
/*
* Requests a Tx timestamp for 'skb'. The phy driver promises
* to deliver it using skb_complete_tx_timestamp() as soon as a
* timestamp becomes available. One of the PTP_CLASS_ values
* is passed in 'type'.
*/
void (*txtstamp)(struct phy_device *dev, struct sk_buff *skb, int type);
/* Some devices (e.g. qnap TS-119P II) require PHY register changes to
* enable Wake on LAN, so set_wol is provided to be called in the
* ethernet driver's set_wol function. */
@@ -942,7 +921,7 @@ static inline bool phy_polling_mode(struct phy_device *phydev)
*/
static inline bool phy_has_hwtstamp(struct phy_device *phydev)
{
return phydev && phydev->drv && phydev->drv->hwtstamp;
return phydev && phydev->mii_ts && phydev->mii_ts->hwtstamp;
}
/**
@@ -951,7 +930,7 @@ static inline bool phy_has_hwtstamp(struct phy_device *phydev)
*/
static inline bool phy_has_rxtstamp(struct phy_device *phydev)
{
return phydev && phydev->drv && phydev->drv->rxtstamp;
return phydev && phydev->mii_ts && phydev->mii_ts->rxtstamp;
}
/**
@@ -961,7 +940,7 @@ static inline bool phy_has_rxtstamp(struct phy_device *phydev)
*/
static inline bool phy_has_tsinfo(struct phy_device *phydev)
{
return phydev && phydev->drv && phydev->drv->ts_info;
return phydev && phydev->mii_ts && phydev->mii_ts->ts_info;
}
/**
@@ -970,30 +949,30 @@ static inline bool phy_has_tsinfo(struct phy_device *phydev)
*/
static inline bool phy_has_txtstamp(struct phy_device *phydev)
{
return phydev && phydev->drv && phydev->drv->txtstamp;
return phydev && phydev->mii_ts && phydev->mii_ts->txtstamp;
}
static inline int phy_hwtstamp(struct phy_device *phydev, struct ifreq *ifr)
{
return phydev->drv->hwtstamp(phydev, ifr);
return phydev->mii_ts->hwtstamp(phydev->mii_ts, ifr);
}
static inline bool phy_rxtstamp(struct phy_device *phydev, struct sk_buff *skb,
int type)
{
return phydev->drv->rxtstamp(phydev, skb, type);
return phydev->mii_ts->rxtstamp(phydev->mii_ts, skb, type);
}
static inline int phy_ts_info(struct phy_device *phydev,
struct ethtool_ts_info *tsinfo)
{
return phydev->drv->ts_info(phydev, tsinfo);
return phydev->mii_ts->ts_info(phydev->mii_ts, tsinfo);
}
static inline void phy_txtstamp(struct phy_device *phydev, struct sk_buff *skb,
int type)
{
phydev->drv->txtstamp(phydev, skb, type);
phydev->mii_ts->txtstamp(phydev->mii_ts, skb, type);
}
/**