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Message-Id: <aa253fc4c1ab387c63aa24bf0c14563861266f5b.1559281985.git.richardcochran@gmail.com>
Date: Thu, 30 May 2019 22:56:22 -0700
From: Richard Cochran <richardcochran@...il.com>
To: netdev@...r.kernel.org
Cc: David Miller <davem@...emloft.net>, devicetree@...r.kernel.org,
Andrew Lunn <andrew@...n.ch>,
Florian Fainelli <f.fainelli@...il.com>,
Jacob Keller <jacob.e.keller@...el.com>,
Mark Rutland <mark.rutland@....com>,
Miroslav Lichvar <mlichvar@...hat.com>,
Rob Herring <robh+dt@...nel.org>,
Willem de Bruijn <willemb@...gle.com>
Subject: [PATCH V5 net-next 2/6] net: Introduce a new MII time stamping interface.
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@...il.com>
---
drivers/net/macvlan.c | 4 +--
drivers/net/phy/dp83640.c | 47 +++++++++++++++++++++++-----------
drivers/net/phy/phy.c | 4 +--
drivers/net/phy/phy_device.c | 2 ++
include/linux/mii_timestamper.h | 56 +++++++++++++++++++++++++++++++++++++++++
include/linux/phy.h | 25 ++----------------
net/8021q/vlan_dev.c | 4 +--
net/core/ethtool.c | 4 +--
net/core/timestamping.c | 20 +++++++--------
9 files changed, 110 insertions(+), 56 deletions(-)
create mode 100644 include/linux/mii_timestamper.h
diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c
index 0ccabde8e9c9..8f7868d31612 100644
--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -1056,8 +1056,8 @@ static int macvlan_ethtool_get_ts_info(struct net_device *dev,
const struct ethtool_ops *ops = real_dev->ethtool_ops;
struct phy_device *phydev = real_dev->phydev;
- if (phydev && phydev->drv && phydev->drv->ts_info) {
- return phydev->drv->ts_info(phydev, info);
+ if (phydev && phydev->mii_ts && phydev->mii_ts->ts_info) {
+ return phydev->mii_ts->ts_info(phydev->mii_ts, info);
} else if (ops->get_ts_info) {
return ops->get_ts_info(real_dev, info);
} else {
diff --git a/drivers/net/phy/dp83640.c b/drivers/net/phy/dp83640.c
index 6580094161a9..a87a72818e89 100644
--- a/drivers/net/phy/dp83640.c
+++ b/drivers/net/phy/dp83640.c
@@ -98,6 +98,7 @@ struct dp83640_private {
struct list_head list;
struct dp83640_clock *clock;
struct phy_device *phydev;
+ struct mii_timestamper mii_ts;
struct delayed_work ts_work;
int hwts_tx_en;
int hwts_rx_en;
@@ -201,6 +202,14 @@ static void dp83640_gpio_defaults(struct ptp_pin_desc *pd)
static LIST_HEAD(phyter_clocks);
static DEFINE_MUTEX(phyter_clocks_lock);
+static int dp83640_hwtstamp(struct mii_timestamper *mii_ts,
+ struct ifreq *ifr);
+static int dp83640_ts_info(struct mii_timestamper *mii_ts,
+ struct ethtool_ts_info *info);
+static bool dp83640_rxtstamp(struct mii_timestamper *mii_ts,
+ struct sk_buff *skb, int type);
+static void dp83640_txtstamp(struct mii_timestamper *mii_ts,
+ struct sk_buff *skb, int type);
static void rx_timestamp_work(struct work_struct *work);
/* extended register access functions */
@@ -1133,13 +1142,18 @@ static int dp83640_probe(struct phy_device *phydev)
goto no_memory;
dp83640->phydev = phydev;
- INIT_DELAYED_WORK(&dp83640->ts_work, rx_timestamp_work);
+ dp83640->mii_ts.rxtstamp = dp83640_rxtstamp;
+ dp83640->mii_ts.txtstamp = dp83640_txtstamp;
+ dp83640->mii_ts.hwtstamp = dp83640_hwtstamp;
+ dp83640->mii_ts.ts_info = dp83640_ts_info;
+ INIT_DELAYED_WORK(&dp83640->ts_work, rx_timestamp_work);
INIT_LIST_HEAD(&dp83640->rxts);
INIT_LIST_HEAD(&dp83640->rxpool);
for (i = 0; i < MAX_RXTS; i++)
list_add(&dp83640->rx_pool_data[i].list, &dp83640->rxpool);
+ phydev->mii_ts = &dp83640->mii_ts;
phydev->priv = dp83640;
spin_lock_init(&dp83640->rx_lock);
@@ -1180,6 +1194,8 @@ static void dp83640_remove(struct phy_device *phydev)
if (phydev->mdio.addr == BROADCAST_ADDR)
return;
+ phydev->mii_ts = NULL;
+
enable_status_frames(phydev, false);
cancel_delayed_work_sync(&dp83640->ts_work);
@@ -1303,9 +1319,10 @@ static int dp83640_config_intr(struct phy_device *phydev)
}
}
-static int dp83640_hwtstamp(struct phy_device *phydev, struct ifreq *ifr)
+static int dp83640_hwtstamp(struct mii_timestamper *mii_ts, struct ifreq *ifr)
{
- struct dp83640_private *dp83640 = phydev->priv;
+ struct dp83640_private *dp83640 =
+ container_of(mii_ts, struct dp83640_private, mii_ts);
struct hwtstamp_config cfg;
u16 txcfg0, rxcfg0;
@@ -1381,8 +1398,8 @@ static int dp83640_hwtstamp(struct phy_device *phydev, struct ifreq *ifr)
mutex_lock(&dp83640->clock->extreg_lock);
- ext_write(0, phydev, PAGE5, PTP_TXCFG0, txcfg0);
- ext_write(0, phydev, PAGE5, PTP_RXCFG0, rxcfg0);
+ ext_write(0, dp83640->phydev, PAGE5, PTP_TXCFG0, txcfg0);
+ ext_write(0, dp83640->phydev, PAGE5, PTP_RXCFG0, rxcfg0);
mutex_unlock(&dp83640->clock->extreg_lock);
@@ -1412,10 +1429,11 @@ static void rx_timestamp_work(struct work_struct *work)
schedule_delayed_work(&dp83640->ts_work, SKB_TIMESTAMP_TIMEOUT);
}
-static bool dp83640_rxtstamp(struct phy_device *phydev,
+static bool dp83640_rxtstamp(struct mii_timestamper *mii_ts,
struct sk_buff *skb, int type)
{
- struct dp83640_private *dp83640 = phydev->priv;
+ struct dp83640_private *dp83640 =
+ container_of(mii_ts, struct dp83640_private, mii_ts);
struct dp83640_skb_info *skb_info = (struct dp83640_skb_info *)skb->cb;
struct list_head *this, *next;
struct rxts *rxts;
@@ -1461,11 +1479,12 @@ static bool dp83640_rxtstamp(struct phy_device *phydev,
return true;
}
-static void dp83640_txtstamp(struct phy_device *phydev,
+static void dp83640_txtstamp(struct mii_timestamper *mii_ts,
struct sk_buff *skb, int type)
{
struct dp83640_skb_info *skb_info = (struct dp83640_skb_info *)skb->cb;
- struct dp83640_private *dp83640 = phydev->priv;
+ struct dp83640_private *dp83640 =
+ container_of(mii_ts, struct dp83640_private, mii_ts);
switch (dp83640->hwts_tx_en) {
@@ -1488,9 +1507,11 @@ static void dp83640_txtstamp(struct phy_device *phydev,
}
}
-static int dp83640_ts_info(struct phy_device *dev, struct ethtool_ts_info *info)
+static int dp83640_ts_info(struct mii_timestamper *mii_ts,
+ struct ethtool_ts_info *info)
{
- struct dp83640_private *dp83640 = dev->priv;
+ struct dp83640_private *dp83640 =
+ container_of(mii_ts, struct dp83640_private, mii_ts);
info->so_timestamping =
SOF_TIMESTAMPING_TX_HARDWARE |
@@ -1521,10 +1542,6 @@ static struct phy_driver dp83640_driver = {
.config_init = dp83640_config_init,
.ack_interrupt = dp83640_ack_interrupt,
.config_intr = dp83640_config_intr,
- .ts_info = dp83640_ts_info,
- .hwtstamp = dp83640_hwtstamp,
- .rxtstamp = dp83640_rxtstamp,
- .txtstamp = dp83640_txtstamp,
};
static int __init dp83640_init(void)
diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index 84671d868a80..1137bef6a752 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -470,8 +470,8 @@ int phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr, int cmd)
return 0;
case SIOCSHWTSTAMP:
- if (phydev->drv && phydev->drv->hwtstamp)
- return phydev->drv->hwtstamp(phydev, ifr);
+ if (phydev->mii_ts && phydev->mii_ts->hwtstamp)
+ return phydev->mii_ts->hwtstamp(phydev->mii_ts, ifr);
/* fall through */
default:
diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index 2c879ba01f35..055087654b2c 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -915,6 +915,8 @@ static void phy_link_change(struct phy_device *phydev, bool up, bool do_carrier)
netif_carrier_off(netdev);
}
phydev->adjust_link(netdev);
+ if (phydev->mii_ts && phydev->mii_ts->link_state)
+ phydev->mii_ts->link_state(phydev->mii_ts, phydev);
}
/**
diff --git a/include/linux/mii_timestamper.h b/include/linux/mii_timestamper.h
new file mode 100644
index 000000000000..8586eed2f3b9
--- /dev/null
+++ b/include/linux/mii_timestamper.h
@@ -0,0 +1,56 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Support for generic time stamping devices on MII buses.
+ * Copyright (C) 2018 Richard Cochran <richardcochran@...il.com>
+ */
+#ifndef _LINUX_MII_TIMESTAMPER_H
+#define _LINUX_MII_TIMESTAMPER_H
+
+#include <linux/device.h>
+#include <linux/ethtool.h>
+#include <linux/skbuff.h>
+
+/**
+ * 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
diff --git a/include/linux/phy.h b/include/linux/phy.h
index dc4b51060ebc..ad63820a89d2 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -22,6 +22,7 @@
#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>
@@ -443,6 +444,7 @@ struct phy_device {
struct phylink *phylink;
struct net_device *attached_dev;
+ struct mii_timestamper *mii_ts;
u8 mdix;
u8 mdix_ctrl;
@@ -548,29 +550,6 @@ 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. */
diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c
index c546c4228075..12b832d32c59 100644
--- a/net/8021q/vlan_dev.c
+++ b/net/8021q/vlan_dev.c
@@ -682,8 +682,8 @@ static int vlan_ethtool_get_ts_info(struct net_device *dev,
const struct ethtool_ops *ops = vlan->real_dev->ethtool_ops;
struct phy_device *phydev = vlan->real_dev->phydev;
- if (phydev && phydev->drv && phydev->drv->ts_info) {
- return phydev->drv->ts_info(phydev, info);
+ if (phydev && phydev->mii_ts && phydev->mii_ts->ts_info) {
+ return phydev->mii_ts->ts_info(phydev->mii_ts, info);
} else if (ops->get_ts_info) {
return ops->get_ts_info(vlan->real_dev, info);
} else {
diff --git a/net/core/ethtool.c b/net/core/ethtool.c
index 4a593853cbf2..e6cb3c987677 100644
--- a/net/core/ethtool.c
+++ b/net/core/ethtool.c
@@ -2168,8 +2168,8 @@ static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
memset(&info, 0, sizeof(info));
info.cmd = ETHTOOL_GET_TS_INFO;
- if (phydev && phydev->drv && phydev->drv->ts_info) {
- err = phydev->drv->ts_info(phydev, &info);
+ if (phydev && phydev->mii_ts && phydev->mii_ts->ts_info) {
+ err = phydev->mii_ts->ts_info(phydev->mii_ts, &info);
} else if (ops->get_ts_info) {
err = ops->get_ts_info(dev, &info);
} else {
diff --git a/net/core/timestamping.c b/net/core/timestamping.c
index 42689d5c468c..95c45c4dc0f9 100644
--- a/net/core/timestamping.c
+++ b/net/core/timestamping.c
@@ -26,7 +26,7 @@
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;
@@ -34,7 +34,7 @@ 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;
@@ -45,22 +45,22 @@ 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)
@@ -75,9 +75,9 @@ 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;
}
--
2.11.0
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