---

yaml
---
r: 203626
b: refs/heads/master
c: c1f19b5
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 15f0127d1d189fda3294b7823e3e654afca54055
+refs/heads/master: c1f19b51d1d87f3e3bb7e6648f43f7d57ed2da6b

trunk/drivers/net/phy/phy.c

@@ -361,6 +361,11 @@ int phy_mii_ioctl(struct phy_device *phydev,
 		}
 		break;
 
+	case SIOCSHWTSTAMP:
+		if (phydev->drv->hwtstamp)
+			return phydev->drv->hwtstamp(phydev, ifr);
+		/* fall through */
+
 	default:
 		return -EOPNOTSUPP;
 	}

trunk/drivers/net/phy/phy_device.c

@@ -460,6 +460,7 @@ int phy_attach_direct(struct net_device *dev, struct phy_device *phydev,
 	}
 
 	phydev->attached_dev = dev;
+	dev->phydev = phydev;
 
 	phydev->dev_flags = flags;
 
@@ -513,6 +514,7 @@ EXPORT_SYMBOL(phy_attach);
  */
 void phy_detach(struct phy_device *phydev)
 {
+	phydev->attached_dev->phydev = NULL;
 	phydev->attached_dev = NULL;
 
 	/* If the device had no specific driver before (i.e. - it

trunk/include/linux/netdevice.h

@@ -54,6 +54,7 @@
 
 struct vlan_group;
 struct netpoll_info;
+struct phy_device;
 /* 802.11 specific */
 struct wireless_dev;
 					/* source back-compat hooks */
@@ -1065,6 +1066,9 @@ struct net_device {
 #endif
 	/* n-tuple filter list attached to this device */
 	struct ethtool_rx_ntuple_list ethtool_ntuple_list;
+
+	/* phy device may attach itself for hardware timestamping */
+	struct phy_device *phydev;
 };
 #define to_net_dev(d) container_of(d, struct net_device, dev)
 

trunk/include/linux/phy.h

@@ -234,6 +234,8 @@ enum phy_state {
 	PHY_RESUMING
 };
 
+struct sk_buff;
+
 /* phy_device: An instance of a PHY
  *
  * drv: Pointer to the driver for this PHY instance
@@ -402,6 +404,26 @@ struct phy_driver {
 	/* Clears up any memory if needed */
 	void (*remove)(struct phy_device *phydev);
 
+	/* 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 to the socket's error queue 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);
+
 	struct device_driver driver;
 };
 #define to_phy_driver(d) container_of(d, struct phy_driver, driver)

trunk/include/linux/skbuff.h

@@ -1933,6 +1933,36 @@ static inline ktime_t net_invalid_timestamp(void)
 	return ktime_set(0, 0);
 }
 
+extern void skb_timestamping_init(void);
+
+#ifdef CONFIG_NETWORK_PHY_TIMESTAMPING
+
+extern void skb_clone_tx_timestamp(struct sk_buff *skb);
+extern bool skb_defer_rx_timestamp(struct sk_buff *skb);
+
+#else /* CONFIG_NETWORK_PHY_TIMESTAMPING */
+
+static inline void skb_clone_tx_timestamp(struct sk_buff *skb)
+{
+}
+
+static inline bool skb_defer_rx_timestamp(struct sk_buff *skb)
+{
+	return false;
+}
+
+#endif /* !CONFIG_NETWORK_PHY_TIMESTAMPING */
+
+/**
+ * skb_complete_tx_timestamp() - deliver cloned skb with tx timestamps
+ *
+ * @skb: clone of the the original outgoing packet
+ * @hwtstamps: hardware time stamps
+ *
+ */
+void skb_complete_tx_timestamp(struct sk_buff *skb,
+			       struct skb_shared_hwtstamps *hwtstamps);
+
 /**
  * skb_tstamp_tx - queue clone of skb with send time stamps
  * @orig_skb:	the original outgoing packet
@@ -1965,6 +1995,7 @@ static inline void sw_tx_timestamp(struct sk_buff *skb)
  */
 static inline void skb_tx_timestamp(struct sk_buff *skb)
 {
+	skb_clone_tx_timestamp(skb);
 	sw_tx_timestamp(skb);
 }
 

trunk/net/Kconfig

@@ -86,6 +86,16 @@ config NETWORK_SECMARK
 	  to nfmark, but designated for security purposes.
 	  If you are unsure how to answer this question, answer N.
 
+config NETWORK_PHY_TIMESTAMPING
+	bool "Timestamping in PHY devices"
+	depends on EXPERIMENTAL
+	help
+	  This allows timestamping of network packets by PHYs with
+	  hardware timestamping capabilities. This option adds some
+	  overhead in the transmit and receive paths.
+
+	  If you are unsure how to answer this question, answer N.
+
 menuconfig NETFILTER
 	bool "Network packet filtering framework (Netfilter)"
 	---help---

trunk/net/core/Makefile

@@ -18,4 +18,4 @@ obj-$(CONFIG_NET_DMA) += user_dma.o
 obj-$(CONFIG_FIB_RULES) += fib_rules.o
 obj-$(CONFIG_TRACEPOINTS) += net-traces.o
 obj-$(CONFIG_NET_DROP_MONITOR) += drop_monitor.o
-
+obj-$(CONFIG_NETWORK_PHY_TIMESTAMPING) += timestamping.o

trunk/net/core/dev.c

@@ -2957,6 +2957,9 @@ int netif_receive_skb(struct sk_buff *skb)
 	if (netdev_tstamp_prequeue)
 		net_timestamp_check(skb);
 
+	if (skb_defer_rx_timestamp(skb))
+		return NET_RX_SUCCESS;
+
 #ifdef CONFIG_RPS
 	{
 		struct rps_dev_flow voidflow, *rflow = &voidflow;

trunk/net/core/timestamping.c

@@ -0,0 +1,126 @@
+/*
+ * PTP 1588 clock support - support for timestamping in PHY devices
+ *
+ * Copyright (C) 2010 OMICRON electronics GmbH
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#include <linux/errqueue.h>
+#include <linux/phy.h>
+#include <linux/ptp_classify.h>
+#include <linux/skbuff.h>
+
+static struct sock_filter ptp_filter[] = {
+	PTP_FILTER
+};
+
+static unsigned int classify(struct sk_buff *skb)
+{
+	if (likely(skb->dev &&
+		   skb->dev->phydev &&
+		   skb->dev->phydev->drv))
+		return sk_run_filter(skb, ptp_filter, ARRAY_SIZE(ptp_filter));
+	else
+		return PTP_CLASS_NONE;
+}
+
+void skb_clone_tx_timestamp(struct sk_buff *skb)
+{
+	struct phy_device *phydev;
+	struct sk_buff *clone;
+	struct sock *sk = skb->sk;
+	unsigned int type;
+
+	if (!sk)
+		return;
+
+	type = classify(skb);
+
+	switch (type) {
+	case PTP_CLASS_V1_IPV4:
+	case PTP_CLASS_V1_IPV6:
+	case PTP_CLASS_V2_IPV4:
+	case PTP_CLASS_V2_IPV6:
+	case PTP_CLASS_V2_L2:
+	case PTP_CLASS_V2_VLAN:
+		phydev = skb->dev->phydev;
+		if (likely(phydev->drv->txtstamp)) {
+			clone = skb_clone(skb, GFP_ATOMIC);
+			if (!clone)
+				return;
+			clone->sk = sk;
+			phydev->drv->txtstamp(phydev, clone, type);
+		}
+		break;
+	default:
+		break;
+	}
+}
+
+void skb_complete_tx_timestamp(struct sk_buff *skb,
+			       struct skb_shared_hwtstamps *hwtstamps)
+{
+	struct sock *sk = skb->sk;
+	struct sock_exterr_skb *serr;
+	int err;
+
+	if (!hwtstamps)
+		return;
+
+	*skb_hwtstamps(skb) = *hwtstamps;
+	serr = SKB_EXT_ERR(skb);
+	memset(serr, 0, sizeof(*serr));
+	serr->ee.ee_errno = ENOMSG;
+	serr->ee.ee_origin = SO_EE_ORIGIN_TIMESTAMPING;
+	skb->sk = NULL;
+	err = sock_queue_err_skb(sk, skb);
+	if (err)
+		kfree_skb(skb);
+}
+EXPORT_SYMBOL_GPL(skb_complete_tx_timestamp);
+
+bool skb_defer_rx_timestamp(struct sk_buff *skb)
+{
+	struct phy_device *phydev;
+	unsigned int type;
+
+	skb_push(skb, ETH_HLEN);
+
+	type = classify(skb);
+
+	skb_pull(skb, ETH_HLEN);
+
+	switch (type) {
+	case PTP_CLASS_V1_IPV4:
+	case PTP_CLASS_V1_IPV6:
+	case PTP_CLASS_V2_IPV4:
+	case PTP_CLASS_V2_IPV6:
+	case PTP_CLASS_V2_L2:
+	case PTP_CLASS_V2_VLAN:
+		phydev = skb->dev->phydev;
+		if (likely(phydev->drv->rxtstamp))
+			return phydev->drv->rxtstamp(phydev, skb, type);
+		break;
+	default:
+		break;
+	}
+
+	return false;
+}
+
+void __init skb_timestamping_init(void)
+{
+	BUG_ON(sk_chk_filter(ptp_filter, ARRAY_SIZE(ptp_filter)));
+}

trunk/net/socket.c

@@ -2394,6 +2394,10 @@ static int __init sock_init(void)
 	netfilter_init();
 #endif
 
+#ifdef CONFIG_NETWORK_PHY_TIMESTAMPING
+	skb_timestamping_init();
+#endif
+
 	return 0;
 }