a6e4bc5304
This patch allows the CAN controller driver to define the number of echo
skb's used for the local loopback (echo), as suggested by Kurt Van
Dijck, with the function:
struct net_device *alloc_candev(int sizeof_priv,
unsigned int echo_skb_max);
The CAN drivers have been adapted accordingly. For the ems_usb driver,
as suggested by Sebastian Haas, the number of echo skb's has been
increased to 10, which improves the transmission performance a lot.
Signed-off-by: Wolfgang Grandegger <wg@grandegger.com>
Signed-off-by: Kurt Van Dijck <kurt.van.dijck@eia.be>
Signed-off-by: David S. Miller <davem@davemloft.net>
72 lines
1.6 KiB
C
72 lines
1.6 KiB
C
/*
|
|
* linux/can/dev.h
|
|
*
|
|
* Definitions for the CAN network device driver interface
|
|
*
|
|
* Copyright (C) 2006 Andrey Volkov <avolkov@varma-el.com>
|
|
* Varma Electronics Oy
|
|
*
|
|
* Copyright (C) 2008 Wolfgang Grandegger <wg@grandegger.com>
|
|
*
|
|
* Send feedback to <socketcan-users@lists.berlios.de>
|
|
*/
|
|
|
|
#ifndef CAN_DEV_H
|
|
#define CAN_DEV_H
|
|
|
|
#include <linux/can/netlink.h>
|
|
#include <linux/can/error.h>
|
|
|
|
/*
|
|
* CAN mode
|
|
*/
|
|
enum can_mode {
|
|
CAN_MODE_STOP = 0,
|
|
CAN_MODE_START,
|
|
CAN_MODE_SLEEP
|
|
};
|
|
|
|
/*
|
|
* CAN common private data
|
|
*/
|
|
struct can_priv {
|
|
struct can_device_stats can_stats;
|
|
|
|
struct can_bittiming bittiming;
|
|
struct can_bittiming_const *bittiming_const;
|
|
struct can_clock clock;
|
|
|
|
enum can_state state;
|
|
u32 ctrlmode;
|
|
|
|
int restart_ms;
|
|
struct timer_list restart_timer;
|
|
|
|
int (*do_set_bittiming)(struct net_device *dev);
|
|
int (*do_set_mode)(struct net_device *dev, enum can_mode mode);
|
|
int (*do_get_state)(const struct net_device *dev,
|
|
enum can_state *state);
|
|
|
|
unsigned int echo_skb_max;
|
|
struct sk_buff **echo_skb;
|
|
};
|
|
|
|
struct net_device *alloc_candev(int sizeof_priv, unsigned int echo_skb_max);
|
|
void free_candev(struct net_device *dev);
|
|
|
|
int open_candev(struct net_device *dev);
|
|
void close_candev(struct net_device *dev);
|
|
|
|
int register_candev(struct net_device *dev);
|
|
void unregister_candev(struct net_device *dev);
|
|
|
|
int can_restart_now(struct net_device *dev);
|
|
void can_bus_off(struct net_device *dev);
|
|
|
|
void can_put_echo_skb(struct sk_buff *skb, struct net_device *dev,
|
|
unsigned int idx);
|
|
void can_get_echo_skb(struct net_device *dev, unsigned int idx);
|
|
void can_free_echo_skb(struct net_device *dev, unsigned int idx);
|
|
|
|
#endif /* CAN_DEV_H */
|