From: "Köry Maincent" <kory.maincent@bootlin.com>
To: Florian Fainelli <florian.fainelli@broadcom.com>
Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-doc@vger.kernel.org,
Thomas Petazzoni <thomas.petazzoni@bootlin.com>,
"David S . Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Jonathan Corbet <corbet@lwn.net>,
Jay Vosburgh <j.vosburgh@gmail.com>,
Andy Gospodarek <andy@greyhouse.net>,
Nicolas Ferre <nicolas.ferre@microchip.com>,
Claudiu Beznea <claudiu.beznea@tuxon.dev>,
Horatiu Vultur <horatiu.vultur@microchip.com>,
UNGLinuxDriver@microchip.com,
Broadcom internal kernel review list
<bcm-kernel-feedback-list@broadcom.com>,
Andrew Lunn <andrew@lunn.ch>,
Heiner Kallweit <hkallweit1@gmail.com>,
Russell King <linux@armlinux.org.uk>,
Richard Cochran <richardcochran@gmail.com>,
Radu Pirea <radu-nicolae.pirea@oss.nxp.com>,
Willem de Bruijn <willemdebruijn.kernel@gmail.com>,
Vladimir Oltean <vladimir.oltean@nxp.com>,
Michael Walle <michael@walle.cc>,
Jacob Keller <jacob.e.keller@intel.com>,
Maxime Chevallier <maxime.chevallier@bootlin.com>
Subject: Re: [PATCH net-next v5 15/16] net ethtool: net: Let the active time stamping layer be selectable
Date: Tue, 10 Oct 2023 10:31:50 +0200 [thread overview]
Message-ID: <20231010103150.4f4bc187@kmaincent-XPS-13-7390> (raw)
In-Reply-To: <ac520b3b-bf70-4643-a259-83e91dd330a6@broadcom.com>
On Mon, 9 Oct 2023 14:28:38 -0700
Florian Fainelli <florian.fainelli@broadcom.com> wrote:
> > +static int ethnl_set_ts_validate(struct ethnl_req_info *req_info,
> > + struct genl_info *info)
> > +{
> > + struct nlattr **tb = info->attrs;
> > + const struct net_device_ops *ops = req_info->dev->netdev_ops;
> > +
> > + if (!tb[ETHTOOL_A_TS_LAYER])
> > + return 0;
> > +
> > + if (!ops->ndo_hwtstamp_set)
> > + return -EOPNOTSUPP;
>
> I would check for this first, in all likelihood this is what most
> drivers currently do not support, no need to event de-reference the
> array of attributes.
Indeed seems more logical.
> > +static int ethnl_set_ts(struct ethnl_req_info *req_info, struct genl_info
> > *info) +{
> > + struct net_device *dev = req_info->dev;
> > + const struct ethtool_ops *ops = dev->ethtool_ops;
> > + struct kernel_hwtstamp_config config = {0};
> > + struct nlattr **tb = info->attrs;
> > + bool mod = false;
> > + u32 ts_layer;
> > + int ret;
> > +
> > + ts_layer = dev->ts_layer;
> > +
> > + if (ts_layer & NETDEV_TIMESTAMPING && !ops->get_ts_info) {
> > + NL_SET_ERR_MSG_ATTR(info->extack, tb[ETHTOOL_A_TS_LAYER],
> > + "this device cannot support
> > timestamping");
>
> Maybe expand the extended ack with "this devices does not support
> MAC-based timestamping"
Ok.
> > + /* Disable time stamping in the current layer. */
> > + if (netif_device_present(dev) &&
> > + dev->ts_layer & (PHYLIB_TIMESTAMPING | NETDEV_TIMESTAMPING)) {
> > + ret = dev_set_hwtstamp_phylib(dev, &config, info->extack);
> >
>
> Can we still land in this function even if no changes to the
> timestamping configuration has been made?
We land in this function every time we change the timestamp from a valid
one.
> If so, would suggest first
> getting the current configuration and compare it with the user-supplied
> configuration if there are no changes, return.
It is already done at the beginning of the function:
> > + ethnl_update_u32(&ts_layer, tb[ETHTOOL_A_TS_LAYER], &mod);
> > +
> > + if (!mod)
> > + return 0;
next prev parent reply other threads:[~2023-10-10 8:32 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-09 15:51 [PATCH net-next v5 00/16] net: Make timestamping selectable Köry Maincent
2023-10-09 15:51 ` [PATCH net-next v5 01/16] net: Convert PHYs hwtstamp callback to use kernel_hwtstamp_config Köry Maincent
2023-10-09 21:02 ` Florian Fainelli
2023-10-10 15:37 ` Simon Horman
2023-10-11 8:27 ` Köry Maincent
2023-10-20 20:23 ` kernel test robot
2023-10-09 15:51 ` [PATCH net-next v5 02/16] net: phy: Remove the call to phy_mii_ioctl in phy_hwstamp_get/set Köry Maincent
2023-10-09 21:04 ` Florian Fainelli
2023-10-09 15:51 ` [PATCH net-next v5 03/16] net: ethtool: Refactor identical get_ts_info implementations Köry Maincent
2023-10-09 19:56 ` kernel test robot
2023-10-09 21:06 ` Florian Fainelli
2023-10-11 21:41 ` Jay Vosburgh
2023-10-09 15:51 ` [PATCH net-next v5 04/16] net: macb: Convert to ndo_hwtstamp_get() and ndo_hwtstamp_set() Köry Maincent
2023-10-09 21:08 ` Florian Fainelli
2023-10-09 15:51 ` [PATCH net-next v5 05/16] net: Make dev_set_hwtstamp_phylib accessible Köry Maincent
2023-10-09 21:09 ` Florian Fainelli
2023-10-10 7:40 ` Köry Maincent
2023-10-09 15:51 ` [PATCH net-next v5 06/16] net_tstamp: Add TIMESTAMPING SOFTWARE and HARDWARE mask Köry Maincent
2023-10-09 21:11 ` Florian Fainelli
2023-10-09 15:51 ` [PATCH net-next v5 07/16] net: phy: micrel: fix ts_info value in case of no phc Köry Maincent
2023-10-09 21:14 ` Florian Fainelli
2023-10-09 15:51 ` [PATCH net-next v5 08/16] net: ethtool: Add a command to expose current time stamping layer Köry Maincent
2023-10-09 21:20 ` Florian Fainelli
2023-10-10 8:23 ` Köry Maincent
2023-10-13 16:00 ` Jakub Kicinski
2023-10-13 16:11 ` Andrew Lunn
2023-10-16 10:41 ` Köry Maincent
2023-10-16 14:22 ` Jakub Kicinski
2023-10-16 15:00 ` Köry Maincent
2023-10-16 15:43 ` Jakub Kicinski
2023-10-16 16:23 ` Köry Maincent
2023-10-16 17:03 ` Jakub Kicinski
2023-10-16 23:03 ` Jacob Keller
2023-10-17 9:21 ` Köry Maincent
2023-10-16 23:50 ` Richard Cochran
2023-10-17 8:29 ` Köry Maincent
2023-10-13 16:14 ` Vladimir Oltean
2023-10-13 16:30 ` Jakub Kicinski
2023-10-13 17:09 ` Vladimir Oltean
2023-10-13 17:46 ` Jakub Kicinski
2023-10-13 17:56 ` Vladimir Oltean
2023-10-13 20:15 ` Jakub Kicinski
2023-10-09 15:51 ` [PATCH net-next v5 09/16] netlink: specs: Introduce new netlink command to get current timestamp Köry Maincent
2023-10-09 21:21 ` Florian Fainelli
2023-10-10 8:40 ` Köry Maincent
2023-10-09 15:51 ` [PATCH net-next v5 10/16] net: ethtool: Add a command to list available time stamping layers Köry Maincent
2023-10-13 22:52 ` kernel test robot
2023-10-09 15:51 ` [PATCH net-next v5 11/16] netlink: specs: Introduce new netlink " Köry Maincent
2023-10-09 21:22 ` Florian Fainelli
2023-10-09 15:51 ` [PATCH net-next v5 12/16] net: Replace hwtstamp_source by timestamping layer Köry Maincent
2023-10-09 21:23 ` Florian Fainelli
2023-10-09 15:51 ` [PATCH net-next v5 13/16] net: Change the API of PHY default timestamp to MAC Köry Maincent
2023-10-09 22:23 ` Florian Fainelli
2023-10-10 15:52 ` Simon Horman
2023-10-13 1:37 ` kernel test robot
2023-10-09 15:51 ` [PATCH net-next v5 14/16] net: ethtool: ts: Update GET_TS to reply the current selected timestamp Köry Maincent
2023-10-09 15:51 ` [PATCH net-next v5 15/16] net ethtool: net: Let the active time stamping layer be selectable Köry Maincent
2023-10-09 21:28 ` Florian Fainelli
2023-10-10 8:31 ` Köry Maincent [this message]
2023-10-09 15:51 ` [PATCH net-next v5 16/16] netlink: specs: Introduce time stamping set command Köry Maincent
2023-10-09 21:29 ` Florian Fainelli
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