From: Richard Cochran <richardcochran@gmail.com>
To: Shawn Bohrer <shawn.bohrer@gmail.com>
Cc: "David S. Miller" <davem@davemloft.net>,
Or Gerlitz <ogerlitz@mellanox.com>,
Amir Vadai <amirv@mellanox.com>,
netdev@vger.kernel.org, tomk@rgmadvisors.com,
Hadar Hen Zion <hadarh@mellanox.com>,
Shawn Bohrer <sbohrer@rgmadvisors.com>
Subject: Re: [PATCH net-next v4 1/2] mlx4_en: Add PTP hardware clock
Date: Wed, 1 Jan 2014 10:46:45 +0100 [thread overview]
Message-ID: <20140101094644.GA7682@netboy> (raw)
In-Reply-To: <1388511580-3657-2-git-send-email-shawn.bohrer@gmail.com>
On Tue, Dec 31, 2013 at 11:39:39AM -0600, Shawn Bohrer wrote:
> From: Shawn Bohrer <sbohrer@rgmadvisors.com>
>
> 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>
> ---
> drivers/net/ethernet/mellanox/mlx4/en_clock.c | 194 ++++++++++++++++++++++-
> drivers/net/ethernet/mellanox/mlx4/en_ethtool.c | 3 +
> drivers/net/ethernet/mellanox/mlx4/en_main.c | 3 +
> drivers/net/ethernet/mellanox/mlx4/mlx4_en.h | 6 +
> 4 files changed, 198 insertions(+), 8 deletions(-)
Acked-by: Richard Cochran <richardcochran@gmail.com>
next prev parent reply other threads:[~2014-01-01 9:46 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-31 17:39 [PATCH net-next v4 0/2] mlx4_en: Add PTP support Shawn Bohrer
2013-12-31 17:39 ` [PATCH net-next v4 1/2] mlx4_en: Add PTP hardware clock Shawn Bohrer
2014-01-01 8:50 ` Hadar Hen-Zion
2014-01-02 3:06 ` David Miller
2014-01-01 9:46 ` Richard Cochran [this message]
2013-12-31 17:39 ` [PATCH net-next v4 2/2] mlx4_en: Only cycle port if HW timestamp config changes Shawn Bohrer
2014-01-01 8:52 ` Hadar Hen-Zion
2014-01-01 9:47 ` [PATCH net-next v4 2/2] " Richard Cochran
2014-01-02 8:32 ` [PATCH net-next v4 0/2] mlx4_en: Add PTP support David Miller
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