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Message-ID: <20190528051750.ub4urccdwmkg2u3c@localhost> Date: Mon, 27 May 2019 22:17:50 -0700 From: Richard Cochran <richardcochran@...il.com> To: Andrew Lunn <andrew@...n.ch> Cc: netdev@...r.kernel.org, David Miller <davem@...emloft.net>, devicetree@...r.kernel.org, Florian Fainelli <f.fainelli@...il.com>, Jacob Keller <jacob.e.keller@...el.com>, Mark Rutland <mark.rutland@....com>, Miroslav Lichvar <mlichvar@...hat.com>, Rob Herring <robh+dt@...nel.org>, Willem de Bruijn <willemb@...gle.com> Subject: Re: [PATCH V3 net-next 2/6] net: Introduce a new MII time stamping interface. On Wed, May 22, 2019 at 02:58:23AM +0200, Andrew Lunn wrote: > > -static int dp83640_hwtstamp(struct phy_device *phydev, struct ifreq *ifr) > > +static int dp83640_hwtstamp(struct mii_timestamper *mii_ts, struct ifreq *ifr) > > { > > - struct dp83640_private *dp83640 = phydev->priv; > > + struct dp83640_private *dp83640 = > > + container_of(mii_ts, struct dp83640_private, mii_ts); > > struct hwtstamp_config cfg; > > u16 txcfg0, rxcfg0; > > Hi Richard > > David might complain about reverse christmas tree. Maybe define a > macro, to_dp83640() which takes mii_ts? That is nice idea for another series, I think. For now this matches the existing 'container_of' usage within the driver. > > +/** > > + * struct mii_timestamper - Callback interface to MII time stamping devices. > > + * > > + * @rxtstamp: Requests a Rx timestamp for 'skb'. If the skb is accepted, > > + * the MII time stamping device promises to deliver it using > > + * netif_rx() as soon as a timestamp becomes available. One of > > + * the PTP_CLASS_ values is passed in 'type'. The function > > + * must return true if the skb is accepted for delivery. > > + * > > + * @txtstamp: Requests a Tx timestamp for 'skb'. The MII time stamping > > + * device promises to deliver it using skb_complete_tx_timestamp() > > + * as soon as a timestamp becomes available. One of the PTP_CLASS_ > > + * values is passed in 'type'. > > + * > > + * @hwtstamp: Handles SIOCSHWTSTAMP ioctl for hardware time stamping. > > + * @link_state: Allows the device to respond to changes in the link state. > > + * @ts_info: Handles ethtool queries for hardware time stamping. > > + * > > + * Drivers for PHY time stamping devices should embed their > > + * mii_timestamper within a private structure, obtaining a reference > > + * to it using container_of(). > > + */ > > I wonder if it is worth mentioning that link_state() is called with > the phy lock held, but none of the others are? Will do. Thanks, Richard
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