39e3ab6fde
This patch adds the function can_free_echo_skb to the CAN device interface to allow upcoming drivers to release echo skb's in case of error. Signed-off-by: Wolfgang Grandegger <wg@grandegger.com> Signed-off-by: David S. Miller <davem@davemloft.net>
72 lines
1.6 KiB
C
72 lines
1.6 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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* Send feedback to <socketcan-users@lists.berlios.de>
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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/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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#define CAN_ECHO_SKB_MAX 4
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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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int restart_ms;
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struct timer_list restart_timer;
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struct sk_buff *echo_skb[CAN_ECHO_SKB_MAX];
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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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};
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struct net_device *alloc_candev(int sizeof_priv);
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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, int idx);
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void can_get_echo_skb(struct net_device *dev, int idx);
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void can_free_echo_skb(struct net_device *dev, int idx);
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#endif /* CAN_DEV_H */
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