19 static void can_update_state_error_stats(struct net_device *dev,  in can_update_state_error_stats()  argument
22 	struct can_priv *priv = netdev_priv(dev);  in can_update_state_error_stats()
42 static int can_tx_state_to_frame(struct net_device *dev, enum can_state state)  in can_tx_state_to_frame()  argument
56 static int can_rx_state_to_frame(struct net_device *dev, enum can_state state)  in can_rx_state_to_frame()  argument
93 void can_change_state(struct net_device *dev, struct can_frame *cf,  in can_change_state()  argument
96 	struct can_priv *priv = netdev_priv(dev);  in can_change_state()
100 		netdev_warn(dev, "%s: oops, state did not change", __func__);  in can_change_state()
104 	netdev_dbg(dev, "Controller changed from %s State (%d) into %s State (%d).\n",  in can_change_state()
108 	can_update_state_error_stats(dev, new_state);  in can_change_state()
121 		       can_tx_state_to_frame(dev, tx_state) : 0;  in can_change_state()
123 		       can_rx_state_to_frame(dev, rx_state) : 0;  in can_change_state()
128 static void can_restart(struct net_device *dev)  in can_restart()  argument
130 	struct can_priv *priv = netdev_priv(dev);  in can_restart()
135 	if (netif_carrier_ok(dev))  in can_restart()
136 		netdev_err(dev, "Attempt to restart for bus-off recovery, but carrier is OK?\n");  in can_restart()
141 	can_flush_echo_skb(dev);  in can_restart()
144 	skb = alloc_can_err_skb(dev, &cf);  in can_restart()
153 	netdev_dbg(dev, "restarted\n");  in can_restart()
157 	netif_carrier_on(dev);  in can_restart()
158 	err = priv->do_set_mode(dev, CAN_MODE_START);  in can_restart()
160 		netdev_err(dev, "Error %d during restart", err);  in can_restart()
161 		netif_carrier_off(dev);  in can_restart()
171 	can_restart(priv->dev);  in can_restart_work()
174 int can_restart_now(struct net_device *dev)  in can_restart_now()  argument
176 	struct can_priv *priv = netdev_priv(dev);  in can_restart_now()
187 	can_restart(dev);  in can_restart_now()
198 void can_bus_off(struct net_device *dev)  in can_bus_off()  argument
200 	struct can_priv *priv = netdev_priv(dev);  in can_bus_off()
203 		netdev_info(dev, "bus-off, scheduling restart in %d ms\n",  in can_bus_off()
206 		netdev_info(dev, "bus-off\n");  in can_bus_off()
208 	netif_carrier_off(dev);  in can_bus_off()
216 void can_setup(struct net_device *dev)  in can_setup()  argument
218 	dev->type = ARPHRD_CAN;  in can_setup()
219 	dev->mtu = CAN_MTU;  in can_setup()
220 	dev->hard_header_len = 0;  in can_setup()
221 	dev->addr_len = 0;  in can_setup()
222 	dev->tx_queue_len = 10;  in can_setup()
225 	dev->flags = IFF_NOARP;  in can_setup()
226 	dev->features = NETIF_F_HW_CSUM;  in can_setup()
234 	struct net_device *dev;  in alloc_candev_mqs()  local
257 	dev = alloc_netdev_mqs(size, "can%d", NET_NAME_UNKNOWN, can_setup,  in alloc_candev_mqs()
259 	if (!dev)  in alloc_candev_mqs()
262 	priv = netdev_priv(dev);  in alloc_candev_mqs()
263 	priv->dev = dev;  in alloc_candev_mqs()
266 	can_set_ml_priv(dev, can_ml);  in alloc_candev_mqs()
278 	return dev;  in alloc_candev_mqs()
283 void free_candev(struct net_device *dev)  in free_candev()  argument
285 	free_netdev(dev);  in free_candev()
290 int can_change_mtu(struct net_device *dev, int new_mtu)  in can_change_mtu()  argument
292 	struct can_priv *priv = netdev_priv(dev);  in can_change_mtu()
296 	if (dev->flags & IFF_UP)  in can_change_mtu()
322 	dev->mtu = new_mtu;  in can_change_mtu()
359 int can_ethtool_op_get_ts_info_hwts(struct net_device *dev,  in can_ethtool_op_get_ts_info_hwts()  argument
382 int open_candev(struct net_device *dev)  in open_candev()  argument
384 	struct can_priv *priv = netdev_priv(dev);  in open_candev()
387 		netdev_err(dev, "bit-timing not yet defined\n");  in open_candev()
395 		netdev_err(dev, "incorrect/missing data bit-timing\n");  in open_candev()
400 	if (!netif_carrier_ok(dev))  in open_candev()
401 		netif_carrier_on(dev);  in open_candev()
412 void of_can_transceiver(struct net_device *dev)  in of_can_transceiver()  argument
415 	struct can_priv *priv = netdev_priv(dev);  in of_can_transceiver()
416 	struct device_node *np = dev->dev.parent->of_node;  in of_can_transceiver()
426 		netdev_warn(dev, "Invalid value for transceiver max bitrate. Ignoring bitrate limit.\n");  in of_can_transceiver()
436 void close_candev(struct net_device *dev)  in close_candev()  argument
438 	struct can_priv *priv = netdev_priv(dev);  in close_candev()
441 	can_flush_echo_skb(dev);  in close_candev()
463 	struct device *dev = ndev->dev.parent;  in can_get_termination()  local
471 	gpio = devm_gpiod_get_optional(dev, "termination", GPIOD_OUT_LOW);  in can_get_termination()
473 		return dev_err_probe(dev, PTR_ERR(gpio),  in can_get_termination()
479 	ret = device_property_read_u32(dev, "termination-ohms", &term);  in can_get_termination()
516 int register_candev(struct net_device *dev)  in register_candev()  argument
518 	struct can_priv *priv = netdev_priv(dev);  in register_candev()
545 		err = can_get_termination(dev);  in register_candev()
550 	dev->rtnl_link_ops = &can_link_ops;  in register_candev()
551 	netif_carrier_off(dev);  in register_candev()
553 	return register_netdev(dev);  in register_candev()
558 void unregister_candev(struct net_device *dev)  in unregister_candev()  argument
560 	unregister_netdev(dev);  in unregister_candev()
567 struct can_priv *safe_candev_priv(struct net_device *dev)  in safe_candev_priv()  argument
569 	if (dev->type != ARPHRD_CAN || dev->rtnl_link_ops != &can_link_ops)  in safe_candev_priv()
572 	return netdev_priv(dev);  in safe_candev_priv()