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authorShawn Bohrer <sbohrer@rgmadvisors.com>2013-12-31 11:39:39 -0600
committerDavid S. Miller <davem@davemloft.net>2014-01-02 03:30:36 -0500
commitad7d4eaed995d76fb24a18e202fdf5072197ff0a (patch)
tree2625d165dd5b6972f582f19e20cc6c955fd9259a /drivers/net/ethernet/mellanox/mlx4/en_main.c
parentdd9b45598a7198f8b12965f2ec453bcb5cb90aec (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_main.c')
-rw-r--r--drivers/net/ethernet/mellanox/mlx4/en_main.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_main.c b/drivers/net/ethernet/mellanox/mlx4/en_main.c
index 725a4e1b5f67..d357bf5a4686 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_main.c
@@ -199,6 +199,9 @@ static void mlx4_en_remove(struct mlx4_dev *dev, void *endev_ptr)
if (mdev->pndev[i])
mlx4_en_destroy_netdev(mdev->pndev[i]);
+ if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_TS)
+ mlx4_en_remove_timestamp(mdev);
+
flush_workqueue(mdev->workqueue);
destroy_workqueue(mdev->workqueue);
(void) mlx4_mr_free(dev, &mdev->mr);