diff options
| author | Shawn Bohrer <sbohrer@rgmadvisors.com> | 2013-12-31 11:39:39 -0600 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-01-02 03:30:36 -0500 |
| commit | ad7d4eaed995d76fb24a18e202fdf5072197ff0a (patch) | |
| tree | 2625d165dd5b6972f582f19e20cc6c955fd9259a /drivers/net/ethernet/mellanox/mlx4/en_ethtool.c | |
| parent | dd9b45598a7198f8b12965f2ec453bcb5cb90aec (diff) | |
mlx4_en: Add PTP hardware clock
This adds a PHC to the mlx4_en driver. We use reader/writer spinlocks to
protect the timecounter since every packet received needs to call
timecounter_cycle2time() when timestamping is enabled. This can become
a performance bottleneck with RSS and multiple receive queues if normal
spinlocks are used.
This driver has been tested with both Documentation/ptp/testptp and the
linuxptp project (http://linuxptp.sourceforge.net/) on a Mellanox
ConnectX-3 card.
Signed-off-by: Shawn Bohrer <sbohrer@rgmadvisors.com>
Acked-By: Hadar Hen Zion <hadarh@mellanox.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx4/en_ethtool.c')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx4/en_ethtool.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c b/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c index 0596f9f85a0e..3e8d33605fe7 100644 --- a/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c +++ b/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c @@ -1193,6 +1193,9 @@ static int mlx4_en_get_ts_info(struct net_device *dev, info->rx_filters = (1 << HWTSTAMP_FILTER_NONE) | (1 << HWTSTAMP_FILTER_ALL); + + if (mdev->ptp_clock) + info->phc_index = ptp_clock_index(mdev->ptp_clock); } return ret; |