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| author | Vincent Mailhol <mailhol.vincent@wanadoo.fr> | 2022-07-27 19:16:37 +0900 |
|---|---|---|
| committer | Marc Kleine-Budde <mkl@pengutronix.de> | 2022-07-28 11:44:30 +0200 |
| commit | 1d46efa0008a6d73dad40e78a2b3fa6d3cfb74e4 (patch) | |
| tree | 3c18872fbba13fc4c046757afa83309932c040e9 /drivers/net/can/usb/etas_es58x | |
| parent | b1f6b93e678fb0ce2cecb0032709fc17c6526299 (diff) | |
| download | linux-1d46efa0008a6d73dad40e78a2b3fa6d3cfb74e4.tar.gz linux-1d46efa0008a6d73dad40e78a2b3fa6d3cfb74e4.tar.bz2 linux-1d46efa0008a6d73dad40e78a2b3fa6d3cfb74e4.zip | |
can: etas_es58x: advertise timestamping capabilities and add ioctl support
Currently, userland has no method to query which timestamping features
are supported by the etas_es58x driver (aside maybe of getting RX
messages and observe whether or not hardware timestamps stay at zero).
The canonical way for a network driver to advertise what kind of
timestamping is supports is to implement
ethtool_ops::get_ts_info(). Here, we use the CAN specific
can_ethtool_op_get_ts_info_hwts() function to achieve this.
In addition, the driver currently does not support the hardware
timestamps ioctls. According to [1], SIOCSHWTSTAMP is "must" and
SIOCGHWTSTAMP is "should". This patch fills up that gap by
implementing net_device_ops::ndo_eth_ioctl() using the CAN specific
function can_eth_ioctl_hwts().
[1] kernel doc Timestamping, section 3.1: "Hardware Timestamping
Implementation: Device Drivers"
Link: https://docs.kernel.org/networking/timestamping.html#hardware-timestamping-implementation-device-drivers
Signed-off-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Link: https://lore.kernel.org/all/20220727101641.198847-11-mailhol.vincent@wanadoo.fr
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to 'drivers/net/can/usb/etas_es58x')
| -rw-r--r-- | drivers/net/can/usb/etas_es58x/es58x_core.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/net/can/usb/etas_es58x/es58x_core.c b/drivers/net/can/usb/etas_es58x/es58x_core.c index c22e989d42ff..3b949e979583 100644 --- a/drivers/net/can/usb/etas_es58x/es58x_core.c +++ b/drivers/net/can/usb/etas_es58x/es58x_core.c @@ -10,6 +10,7 @@ * Copyright (c) 2020, 2021 Vincent Mailhol <mailhol.vincent@wanadoo.fr> */ +#include <linux/ethtool.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/usb.h> @@ -1978,7 +1979,12 @@ static netdev_tx_t es58x_start_xmit(struct sk_buff *skb, static const struct net_device_ops es58x_netdev_ops = { .ndo_open = es58x_open, .ndo_stop = es58x_stop, - .ndo_start_xmit = es58x_start_xmit + .ndo_start_xmit = es58x_start_xmit, + .ndo_eth_ioctl = can_eth_ioctl_hwts, +}; + +static const struct ethtool_ops es58x_ethtool_ops = { + .get_ts_info = can_ethtool_op_get_ts_info_hwts, }; /** @@ -2085,6 +2091,7 @@ static int es58x_init_netdev(struct es58x_device *es58x_dev, int channel_idx) es58x_init_priv(es58x_dev, es58x_priv(netdev), channel_idx); netdev->netdev_ops = &es58x_netdev_ops; + netdev->ethtool_ops = &es58x_ethtool_ops; netdev->flags |= IFF_ECHO; /* We support local echo */ netdev->dev_port = channel_idx; |