f861c2b80c
The BerliOS project, which currently hosts our mailinglist, will close with the end of the year. Now take the chance and remove all occurrences of the mailinglist address from the source files. Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by: David S. Miller <davem@davemloft.net>
103 lines
2.5 KiB
C
103 lines
2.5 KiB
C
/*
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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/netlink.h>
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#include <linux/can/error.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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/*
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* CAN common private data
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*/
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struct can_priv {
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struct can_device_stats can_stats;
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struct can_bittiming bittiming;
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struct can_bittiming_const *bittiming_const;
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struct can_clock clock;
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enum can_state state;
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u32 ctrlmode;
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u32 ctrlmode_supported;
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int restart_ms;
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struct timer_list restart_timer;
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int (*do_set_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_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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};
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/*
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* get_can_dlc(value) - helper macro to cast a given data length code (dlc)
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* to __u8 and ensure the dlc value to be max. 8 bytes.
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*
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* To be used in the CAN netdriver receive path to ensure conformance with
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* ISO 11898-1 Chapter 8.4.2.3 (DLC field)
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*/
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#define get_can_dlc(i) (min_t(__u8, (i), 8))
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/* Drop a given socketbuffer if it does not contain a valid CAN frame. */
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static inline int can_dropped_invalid_skb(struct net_device *dev,
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struct sk_buff *skb)
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{
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const struct can_frame *cf = (struct can_frame *)skb->data;
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if (unlikely(skb->len != sizeof(*cf) || cf->can_dlc > 8)) {
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kfree_skb(skb);
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dev->stats.tx_dropped++;
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return 1;
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}
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return 0;
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}
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struct net_device *alloc_candev(int sizeof_priv, unsigned int echo_skb_max);
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void free_candev(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 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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void can_put_echo_skb(struct sk_buff *skb, struct net_device *dev,
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unsigned int idx);
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void can_get_echo_skb(struct net_device *dev, unsigned int idx);
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void can_free_echo_skb(struct net_device *dev, unsigned int idx);
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struct sk_buff *alloc_can_skb(struct net_device *dev, struct can_frame **cf);
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struct sk_buff *alloc_can_err_skb(struct net_device *dev,
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struct can_frame **cf);
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#endif /* CAN_DEV_H */
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