lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:   Mon, 13 Jul 2020 06:25:57 -0700
From:   Richard Cochran <richardcochran@...il.com>
To:     sundeep subbaraya <sundeep.lkml@...il.com>
Cc:     David Miller <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org,
        sgoutham@...vell.com, Subbaraya Sundeep <sbhatta@...vell.com>,
        Aleksey Makarov <amakarov@...vell.com>
Subject: Re: [PATCH v3 net-next 3/3] octeontx2-pf: Add support for PTP clock

On Mon, Jul 13, 2020 at 11:40:34AM +0530, sundeep subbaraya wrote:
> > > +static int otx2_ioctl(struct net_device *netdev, struct ifreq *req, int cmd)
> > > +{
> > > +     struct otx2_nic *pfvf = netdev_priv(netdev);
> > > +     struct hwtstamp_config *cfg = &pfvf->tstamp;
> > > +
> >
> > Need to test phy_has_hwtstamp() here and pass ioctl to PHY if true.
> >
> For this platform PHY is taken care of by firmware hence it is not
> possible.

This has nothing to do with the FW.  The HW design might include a PHY
or MII time stamping device.

> > SKBTX_IN_PROGRESS may be set by the PHY, so you need to test whether
> > time stamping is enabled in your MAC driver as well.
> >
> In our case PHY will not set it and the pfvf/MAC driver sets it.

That might be true today, but the MAC driver should not prevent the
possibility of using an external time stamping device in the future.

Thanks,
Richard

Powered by blists - more mailing lists