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| author |   Vincent Mailhol <mailhol.vincent@wanadoo.fr> | 2022-07-27 19:16:32 +0900 |
|---|---|---|
| committer |   Marc Kleine-Budde <mkl@pengutronix.de> | 2022-07-28 11:44:01 +0200 |
| commit | 409c188c57cdb5cb1dfcac79e72b5169f0463fe4 (patch) | |
| tree | 7a1f501d9a814c5d8730d9d090a2595b015ab0d8 /drivers/net/can/pch_can.c | |
| parent | can: v(x)can: add software tx timestamps (diff) | |
| download | linux-dev-409c188c57cdb5cb1dfcac79e72b5169f0463fe4.tar.xz linux-dev-409c188c57cdb5cb1dfcac79e72b5169f0463fe4.zip | |
can: tree-wide: advertise software timestamping capabilities
Currently, some CAN drivers support hardware timestamping, some do
not. But userland has no method to query which features are supported
(aside maybe of getting RX messages and observe whether or not
hardware timestamps stay at zero).
The canonical way for a network driver to advertised what kind of
timestamping it supports is to implement ethtool_ops::get_ts_info().
This patch only targets the CAN drivers which *do not* support
hardware timestamping. For each of those CAN drivers, implement the
get_ts_info() using the generic ethtool_op_get_ts_info().
This way, userland can do:
| $ ethtool --show-time-stamping canX
to confirm the device timestamping capacities.
N.B. the drivers which support hardware timestamping will be migrated
in separate patches.
Signed-off-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Link: https://lore.kernel.org/all/20220727101641.198847-6-mailhol.vincent@wanadoo.fr
[mkl: mscan: add missing mscan_ethtool_ops]
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to 'drivers/net/can/pch_can.c')
| -rw-r--r-- | drivers/net/can/pch_can.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/net/can/pch_can.c b/drivers/net/can/pch_can.c index 32804fed116c..0558ff67ec6a 100644 --- a/drivers/net/can/pch_can.c +++ b/drivers/net/can/pch_can.c @@ -6,6 +6,7 @@ #include <linux/interrupt.h> #include <linux/delay.h> +#include <linux/ethtool.h> #include <linux/io.h> #include <linux/module.h> #include <linux/sched.h> @@ -938,6 +939,10 @@ static const struct net_device_ops pch_can_netdev_ops = { .ndo_change_mtu = can_change_mtu, }; +static const struct ethtool_ops pch_can_ethtool_ops = { + .get_ts_info = ethtool_op_get_ts_info, +}; + static void pch_can_remove(struct pci_dev *pdev) { struct net_device *ndev = pci_get_drvdata(pdev); @@ -1188,6 +1193,7 @@ static int pch_can_probe(struct pci_dev *pdev, pci_set_drvdata(pdev, ndev); SET_NETDEV_DEV(ndev, &pdev->dev); ndev->netdev_ops = &pch_can_netdev_ops; + ndev->ethtool_ops = &pch_can_ethtool_ops; priv->can.clock.freq = PCH_CAN_CLK; /* Hz */ netif_napi_add_weight(ndev, &priv->napi, pch_can_poll, PCH_RX_OBJ_END); |