Commits
Shawn Bohrer committed ad7d4eaed99
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>