ethtool: Add a common function for drivers with transmit time stamping.
authorRichard Cochran <richardcochran@gmail.com>
Tue, 3 Apr 2012 22:59:22 +0000 (22:59 +0000)
committerDavid S. Miller <davem@davemloft.net>
Wed, 4 Apr 2012 09:28:46 +0000 (05:28 -0400)
Currently, most drivers do not support transmit SO_TIMESTAMPING. For those
that do support it, there is one appropriate response to the get_ts_info
query. This patch adds a common function providing this response.

Signed-off-by: Richard Cochran <richardcochran@gmail.com>
Reviewed-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
include/linux/ethtool.h
net/core/ethtool.c

index 1769714447b39a915f3119967e6b84a640003a85..560a247bde2a219237c0076b8f6d33323de806a2 100644 (file)
@@ -811,6 +811,7 @@ struct net_device;
 
 /* Some generic methods drivers may use in their ethtool_ops */
 u32 ethtool_op_get_link(struct net_device *dev);
+int ethtool_op_get_ts_info(struct net_device *dev, struct ethtool_ts_info *eti);
 
 /**
  * ethtool_rxfh_indir_default - get default value for RX flow hash indirection
index a723b132169122a6ffcadbcfff9268ef036b90ff..beacdd93cd8fcd0fff5d95faff1415dd4e7beb67 100644 (file)
@@ -38,6 +38,17 @@ u32 ethtool_op_get_link(struct net_device *dev)
 }
 EXPORT_SYMBOL(ethtool_op_get_link);
 
+int ethtool_op_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info)
+{
+       info->so_timestamping =
+               SOF_TIMESTAMPING_TX_SOFTWARE |
+               SOF_TIMESTAMPING_RX_SOFTWARE |
+               SOF_TIMESTAMPING_SOFTWARE;
+       info->phc_index = -1;
+       return 0;
+}
+EXPORT_SYMBOL(ethtool_op_get_ts_info);
+
 /* Handlers for each ethtool command */
 
 #define ETHTOOL_DEV_FEATURE_WORDS      ((NETDEV_FEATURE_COUNT + 31) / 32)