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0a6e1bd2d2
[ Upstream commit 90f942c5a6 ]
Tools based on libpcap (such as tcpdump) expect the SIOCSHWTSTAMP
ioctl call to be supported. This is also specified in the kernel doc
[1]. The purpose of this ioctl is to toggle the hardware timestamps.
Currently, CAN devices which support hardware timestamping have those
always activated. can_eth_ioctl_hwts() is a dumb function that will
always succeed when requested to set tx_type to HWTSTAMP_TX_ON or
rx_filter to HWTSTAMP_FILTER_ALL.
[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/20220727101641.198847-9-mailhol.vincent@wanadoo.fr
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Stable-dep-of: 38c0abad45b1 ("can: etas_es58x: populate ndo_change_mtu() to prevent buffer overflow")
Signed-off-by: Sasha Levin <sashal@kernel.org>
161 lines
4.5 KiB
C
161 lines
4.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* linux/can/dev.h
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*
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* Definitions for the CAN network device driver interface
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*
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* Copyright (C) 2006 Andrey Volkov <avolkov@varma-el.com>
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* Varma Electronics Oy
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*
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* Copyright (C) 2008 Wolfgang Grandegger <wg@grandegger.com>
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*
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*/
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#ifndef _CAN_DEV_H
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#define _CAN_DEV_H
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#include <linux/can.h>
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#include <linux/can/bittiming.h>
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#include <linux/can/error.h>
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#include <linux/can/led.h>
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#include <linux/can/length.h>
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#include <linux/can/netlink.h>
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#include <linux/can/skb.h>
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#include <linux/ethtool.h>
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#include <linux/netdevice.h>
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/*
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* CAN mode
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*/
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enum can_mode {
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CAN_MODE_STOP = 0,
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CAN_MODE_START,
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CAN_MODE_SLEEP
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};
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enum can_termination_gpio {
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CAN_TERMINATION_GPIO_DISABLED = 0,
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CAN_TERMINATION_GPIO_ENABLED,
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CAN_TERMINATION_GPIO_MAX,
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};
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/*
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* CAN common private data
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*/
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struct can_priv {
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struct net_device *dev;
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struct can_device_stats can_stats;
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const struct can_bittiming_const *bittiming_const,
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*data_bittiming_const;
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struct can_bittiming bittiming, data_bittiming;
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const struct can_tdc_const *tdc_const;
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struct can_tdc tdc;
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unsigned int bitrate_const_cnt;
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const u32 *bitrate_const;
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const u32 *data_bitrate_const;
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unsigned int data_bitrate_const_cnt;
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u32 bitrate_max;
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struct can_clock clock;
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unsigned int termination_const_cnt;
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const u16 *termination_const;
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u16 termination;
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struct gpio_desc *termination_gpio;
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u16 termination_gpio_ohms[CAN_TERMINATION_GPIO_MAX];
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enum can_state state;
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/* CAN controller features - see include/uapi/linux/can/netlink.h */
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u32 ctrlmode; /* current options setting */
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u32 ctrlmode_supported; /* options that can be modified by netlink */
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u32 ctrlmode_static; /* static enabled options for driver/hardware */
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int restart_ms;
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struct delayed_work restart_work;
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int (*do_set_bittiming)(struct net_device *dev);
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int (*do_set_data_bittiming)(struct net_device *dev);
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int (*do_set_mode)(struct net_device *dev, enum can_mode mode);
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int (*do_set_termination)(struct net_device *dev, u16 term);
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int (*do_get_state)(const struct net_device *dev,
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enum can_state *state);
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int (*do_get_berr_counter)(const struct net_device *dev,
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struct can_berr_counter *bec);
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unsigned int echo_skb_max;
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struct sk_buff **echo_skb;
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#ifdef CONFIG_CAN_LEDS
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struct led_trigger *tx_led_trig;
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char tx_led_trig_name[CAN_LED_NAME_SZ];
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struct led_trigger *rx_led_trig;
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char rx_led_trig_name[CAN_LED_NAME_SZ];
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struct led_trigger *rxtx_led_trig;
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char rxtx_led_trig_name[CAN_LED_NAME_SZ];
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#endif
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};
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static inline bool can_tdc_is_enabled(const struct can_priv *priv)
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{
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return !!(priv->ctrlmode & CAN_CTRLMODE_TDC_MASK);
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}
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/* helper to define static CAN controller features at device creation time */
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static inline void can_set_static_ctrlmode(struct net_device *dev,
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u32 static_mode)
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{
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struct can_priv *priv = netdev_priv(dev);
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/* alloc_candev() succeeded => netdev_priv() is valid at this point */
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priv->ctrlmode = static_mode;
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priv->ctrlmode_static = static_mode;
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/* override MTU which was set by default in can_setup()? */
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if (static_mode & CAN_CTRLMODE_FD)
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dev->mtu = CANFD_MTU;
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}
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void can_setup(struct net_device *dev);
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struct net_device *alloc_candev_mqs(int sizeof_priv, unsigned int echo_skb_max,
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unsigned int txqs, unsigned int rxqs);
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#define alloc_candev(sizeof_priv, echo_skb_max) \
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alloc_candev_mqs(sizeof_priv, echo_skb_max, 1, 1)
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#define alloc_candev_mq(sizeof_priv, echo_skb_max, count) \
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alloc_candev_mqs(sizeof_priv, echo_skb_max, count, count)
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void free_candev(struct net_device *dev);
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/* a candev safe wrapper around netdev_priv */
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struct can_priv *safe_candev_priv(struct net_device *dev);
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int open_candev(struct net_device *dev);
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void close_candev(struct net_device *dev);
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int can_change_mtu(struct net_device *dev, int new_mtu);
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int can_eth_ioctl_hwts(struct net_device *netdev, struct ifreq *ifr, int cmd);
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int can_ethtool_op_get_ts_info_hwts(struct net_device *dev,
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struct ethtool_ts_info *info);
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int register_candev(struct net_device *dev);
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void unregister_candev(struct net_device *dev);
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int can_restart_now(struct net_device *dev);
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void can_bus_off(struct net_device *dev);
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const char *can_get_state_str(const enum can_state state);
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void can_change_state(struct net_device *dev, struct can_frame *cf,
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enum can_state tx_state, enum can_state rx_state);
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#ifdef CONFIG_OF
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void of_can_transceiver(struct net_device *dev);
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#else
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static inline void of_can_transceiver(struct net_device *dev) { }
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#endif
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extern struct rtnl_link_ops can_link_ops;
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int can_netlink_register(void);
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void can_netlink_unregister(void);
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#endif /* !_CAN_DEV_H */
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