diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h
index e1d9e0ede3095a080c0a40cefa70799a0654e756..1769714447b39a915f3119967e6b84a640003a85 100644
--- a/include/linux/ethtool.h
+++ b/include/linux/ethtool.h
@@ -726,6 +726,29 @@ struct ethtool_sfeatures {
struct ethtool_set_features_block features[0];
};
+/**
+ * struct ethtool_ts_info - holds a device's timestamping and PHC association
+ * @cmd: command number = %ETHTOOL_GET_TS_INFO
+ * @so_timestamping: bit mask of the sum of the supported SO_TIMESTAMPING flags
+ * @phc_index: device index of the associated PHC, or -1 if there is none
+ * @tx_types: bit mask of the supported hwtstamp_tx_types enumeration values
+ * @rx_filters: bit mask of the supported hwtstamp_rx_filters enumeration values
+ *
+ * The bits in the 'tx_types' and 'rx_filters' fields correspond to
+ * the 'hwtstamp_tx_types' and 'hwtstamp_rx_filters' enumeration values,
+ * respectively. For example, if the device supports HWTSTAMP_TX_ON,
+ * then (1 << HWTSTAMP_TX_ON) in 'tx_types' will be set.
+ */
+struct ethtool_ts_info {
+ __u32 cmd;
+ __u32 so_timestamping;
+ __s32 phc_index;
+ __u32 tx_types;
+ __u32 tx_reserved[3];
+ __u32 rx_filters;
+ __u32 rx_reserved[3];
+};
+
/*
* %ETHTOOL_SFEATURES changes features present in features[].valid to the
* values of corresponding bits in features[].requested. Bits in .requested
@@ -893,6 +916,9 @@ static inline u32 ethtool_rxfh_indir_default(u32 index, u32 n_rx_rings)
* and flag of the device.
* @get_dump_data: Get dump data.
* @set_dump: Set dump specific flags to the device.
+ * @get_ts_info: Get the time stamping and PTP hardware clock capabilities.
+ * Drivers supporting transmit time stamps in software should set this to
+ * ethtool_op_get_ts_info().
*
* All operations are optional (i.e. the function pointer may be set
* to %NULL) and callers must take this into account. Callers must
@@ -955,6 +981,7 @@ struct ethtool_ops {
int (*get_dump_data)(struct net_device *,
struct ethtool_dump *, void *);
int (*set_dump)(struct net_device *, struct ethtool_dump *);
+ int (*get_ts_info)(struct net_device *, struct ethtool_ts_info *);
};
#endif /* __KERNEL__ */
@@ -1029,6 +1056,7 @@ struct ethtool_ops {
#define ETHTOOL_SET_DUMP 0x0000003e /* Set dump settings */
#define ETHTOOL_GET_DUMP_FLAG 0x0000003f /* Get dump settings */
#define ETHTOOL_GET_DUMP_DATA 0x00000040 /* Get dump data */
+#define ETHTOOL_GET_TS_INFO 0x00000041 /* Get time stamping and PHC info */
/* compatibility with older code */
#define SPARC_ETH_GSET ETHTOOL_GSET
diff --git a/include/linux/phy.h b/include/linux/phy.h
index 6fe0a37d4abf3ca87b9e572bf21d21e21f07b34c..f092032f1c98ca7622a2da60415e0090fd3d2964 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -412,6 +412,9 @@ struct phy_driver {
/* Clears up any memory if needed */
void (*remove)(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);
diff --git a/net/core/ethtool.c b/net/core/ethtool.c
index 6d6d7d25caaa30319870c6b1d62b38eb8972e543..a723b132169122a6ffcadbcfff9268ef036b90ff 100644
--- a/net/core/ethtool.c
+++ b/net/core/ethtool.c
@@ -17,6 +17,8 @@
#include <linux/errno.h>
#include <linux/ethtool.h>
#include <linux/netdevice.h>
+#include <linux/net_tstamp.h>
+#include <linux/phy.h>
#include <linux/bitops.h>
#include <linux/uaccess.h>
#include <linux/vmalloc.h>
@@ -1278,6 +1280,40 @@ static int ethtool_get_dump_data(struct net_device *dev,
return ret;
}
+static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
+{
+ int err = 0;
+ struct ethtool_ts_info info;
+ const struct ethtool_ops *ops = dev->ethtool_ops;
+ struct phy_device *phydev = dev->phydev;
+
+ 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);
+
+ } else if (dev->ethtool_ops && dev->ethtool_ops->get_ts_info) {
+
+ err = ops->get_ts_info(dev, &info);
+
+ } else {
+ info.so_timestamping =
+ SOF_TIMESTAMPING_RX_SOFTWARE |
+ SOF_TIMESTAMPING_SOFTWARE;
+ info.phc_index = -1;
+ }
+
+ if (err)
+ return err;
+
+ if (copy_to_user(useraddr, &info, sizeof(info)))
+ err = -EFAULT;
+
+ return err;
+}
+
/* The main entry point in this file. Called from net/core/dev.c */
int dev_ethtool(struct net *net, struct ifreq *ifr)
@@ -1295,11 +1331,13 @@ int dev_ethtool(struct net *net, struct ifreq *ifr)
return -EFAULT;
if (!dev->ethtool_ops) {
- /* ETHTOOL_GDRVINFO does not require any driver support.
- * It is also unprivileged and does not change anything,
- * so we can take a shortcut to it. */
+ /* A few commands do not require any driver support,
+ * are unprivileged, and do not change anything, so we
+ * can take a shortcut to them. */
if (ethcmd == ETHTOOL_GDRVINFO)
return ethtool_get_drvinfo(dev, useraddr);
+ else if (ethcmd == ETHTOOL_GET_TS_INFO)
+ return ethtool_get_ts_info(dev, useraddr);
else
return -EOPNOTSUPP;
}
@@ -1330,6 +1368,7 @@ int dev_ethtool(struct net *net, struct ifreq *ifr)
case ETHTOOL_GRXCLSRULE:
case ETHTOOL_GRXCLSRLALL:
case ETHTOOL_GFEATURES:
+ case ETHTOOL_GET_TS_INFO:
break;
default:
if (!capable(CAP_NET_ADMIN))
@@ -1496,6 +1535,9 @@ int dev_ethtool(struct net *net, struct ifreq *ifr)
case ETHTOOL_GET_DUMP_DATA:
rc = ethtool_get_dump_data(dev, useraddr);
break;
+ case ETHTOOL_GET_TS_INFO:
+ rc = ethtool_get_ts_info(dev, useraddr);
+ break;
default:
rc = -EOPNOTSUPP;
}