diff options
| author | Vincent Mailhol <mailhol.vincent@wanadoo.fr> | 2022-07-27 19:16:34 +0900 |
|---|---|---|
| committer | Marc Kleine-Budde <mkl@pengutronix.de> | 2022-07-28 11:44:30 +0200 |
| commit | 7fb48d25b5ce3bc488dbb019bf1736248181de9a (patch) | |
| tree | f3ad4119ba14e1c3ffe43c5081a27e4b7d1b4a24 /drivers/net/can | |
| parent | 8bdd1112edcd3edce2843e03826204a84a61042d (diff) | |
| download | linux-7fb48d25b5ce3bc488dbb019bf1736248181de9a.tar.bz2 | |
can: dev: add generic function can_ethtool_op_get_ts_info_hwts()
Add function can_ethtool_op_get_ts_info_hwts(). This function will be
used by CAN devices with hardware TX/RX timestamping support to
implement ethtool_ops::get_ts_info. This function does not offer
support to activate/deactivate hardware timestamps at device level nor
support the filter options (which is currently the case for all CAN
devices with hardware timestamping support).
The fact that hardware timestamp can not be deactivated at hardware
level does not impact the userland. As long as the user do not set
SO_TIMESTAMPING using a setsockopt() or ioctl(), the kernel will not
emit TX timestamps (RX timestamps will still be reproted as it is the
case currently).
Drivers which need more fine grained control remains free to implement
their own function, but we foresee that the generic function
introduced here will be sufficient for the majority.
Signed-off-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Link: https://lore.kernel.org/all/20220727101641.198847-8-mailhol.vincent@wanadoo.fr
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to 'drivers/net/can')
| -rw-r--r-- | drivers/net/can/dev/dev.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/net/can/dev/dev.c b/drivers/net/can/dev/dev.c index 523eaacfe29e..f307034ff4fd 100644 --- a/drivers/net/can/dev/dev.c +++ b/drivers/net/can/dev/dev.c @@ -322,6 +322,27 @@ int can_change_mtu(struct net_device *dev, int new_mtu) } EXPORT_SYMBOL_GPL(can_change_mtu); +/* generic implementation of ethtool_ops::get_ts_info for CAN devices + * supporting hardware timestamps + */ +int can_ethtool_op_get_ts_info_hwts(struct net_device *dev, + struct ethtool_ts_info *info) +{ + info->so_timestamping = + SOF_TIMESTAMPING_TX_SOFTWARE | + SOF_TIMESTAMPING_RX_SOFTWARE | + SOF_TIMESTAMPING_SOFTWARE | + SOF_TIMESTAMPING_TX_HARDWARE | + SOF_TIMESTAMPING_RX_HARDWARE | + SOF_TIMESTAMPING_RAW_HARDWARE; + info->phc_index = -1; + info->tx_types = BIT(HWTSTAMP_TX_ON); + info->rx_filters = BIT(HWTSTAMP_FILTER_ALL); + + return 0; +} +EXPORT_SYMBOL(can_ethtool_op_get_ts_info_hwts); + /* Common open function when the device gets opened. * * This function should be called in the open function of the device |