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From: Richard Cochran <richardcochran@gmail.com>
To: Jacob Keller <jacob.e.keller@intel.com>
Cc: netdev@vger.kernel.org,
	Intel Wired LAN <intel-wired-lan@lists.osuosl.org>,
	Jeffrey Kirsher <jeffrey.t.kirsher@intel.com>
Subject: Re: [net-next v3 5/7] igb: reject unsupported external timestamp flags
Date: Sat, 12 Oct 2019 11:31:09 -0700
Message-ID: <20191012183109.GF3165@localhost> (raw)
In-Reply-To: <20190926181109.4871-6-jacob.e.keller@intel.com>

On Thu, Sep 26, 2019 at 11:11:07AM -0700, Jacob Keller wrote:
> Fix the igb PTP support to explicitly reject any future flags that
> get added to the external timestamp request ioctl.
> 
> In order to maintain currently functioning code, this patch accepts all
> three current flags. This is because the PTP_RISING_EDGE and
> PTP_FALLING_EDGE flags have unclear semantics and each driver seems to
> have interpreted them slightly differently.

This HW always time stamps both edges:

  flags                                                 Meaning                   
  ----------------------------------------------------  -------------------------- 
  PTP_ENABLE_FEATURE                                    Time stamp both edges
  PTP_ENABLE_FEATURE|PTP_RISING_EDGE                    Time stamp both edges
  PTP_ENABLE_FEATURE|PTP_FALLING_EDGE                   Time stamp both edges
  PTP_ENABLE_FEATURE|PTP_RISING_EDGE|PTP_FALLING_EDGE   Time stamp both edges
 
> Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>

Reviewed-by: Richard Cochran <richardcochran@gmail.com>

  parent reply index

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-26 18:11 [net-next v3 0/7] new PTP ioctl fixes Jacob Keller
2019-09-26 18:11 ` [net-next v3 1/7] ptp: correctly disable flags on old ioctls Jacob Keller
2019-10-11  1:03   ` Brown, Aaron F
2019-09-26 18:11 ` [net-next v3 2/7] net: reject PTP periodic output requests with unsupported flags Jacob Keller
2019-10-11  1:05   ` Brown, Aaron F
2019-10-12 18:08   ` Richard Cochran
2019-09-26 18:11 ` [net-next v3 3/7] mv88e6xxx: reject unsupported external timestamp flags Jacob Keller
2019-10-12 18:24   ` Richard Cochran
2019-10-12 19:36     ` Keller, Jacob E
2019-10-12 23:27       ` Richard Cochran
2019-10-14 17:20         ` Keller, Jacob E
2019-09-26 18:11 ` [net-next v3 4/7] dp83640: " Jacob Keller
2019-10-12 18:28   ` Richard Cochran
2019-09-26 18:11 ` [net-next v3 5/7] igb: " Jacob Keller
2019-10-11  0:57   ` [Intel-wired-lan] " Brown, Aaron F
2019-10-12 18:31   ` Richard Cochran [this message]
2019-09-26 18:11 ` [net-next v3 6/7] mlx5: " Jacob Keller
2019-10-12 18:36   ` Richard Cochran
2019-09-26 18:11 ` [net-next v3 7/7] renesas: " Jacob Keller
2019-09-27 16:22   ` Sergei Shtylyov
2019-10-12 18:38   ` Richard Cochran
2019-09-27 18:29 ` [net-next v3 0/7] new PTP ioctl fixes David Miller
2019-09-27 22:16   ` Keller, Jacob E
2019-11-13  1:58 ` Richard Cochran
2019-11-13 17:10   ` Richard Cochran
2019-11-13 19:34     ` Richard Cochran
2019-11-13 19:58       ` Keller, Jacob E

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