0d66548a10
This patch adds the CAN core functionality but no protocols or drivers. No protocol implementations are included here. They come as separate patches. Protocol numbers are already in include/linux/can.h. Signed-off-by: Oliver Hartkopp <oliver.hartkopp@volkswagen.de> Signed-off-by: Urs Thuermann <urs.thuermann@volkswagen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
122 lines
4 KiB
C
122 lines
4 KiB
C
/*
|
|
* Copyright (c) 2002-2007 Volkswagen Group Electronic Research
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of Volkswagen nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* Alternatively, provided that this notice is retained in full, this
|
|
* software may be distributed under the terms of the GNU General
|
|
* Public License ("GPL") version 2, in which case the provisions of the
|
|
* GPL apply INSTEAD OF those given above.
|
|
*
|
|
* The provided data structures and external interfaces from this code
|
|
* are not restricted to be used by modules with a GPL compatible license.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
|
|
* DAMAGE.
|
|
*
|
|
* Send feedback to <socketcan-users@lists.berlios.de>
|
|
*
|
|
*/
|
|
|
|
#ifndef AF_CAN_H
|
|
#define AF_CAN_H
|
|
|
|
#include <linux/skbuff.h>
|
|
#include <linux/netdevice.h>
|
|
#include <linux/list.h>
|
|
#include <linux/rcupdate.h>
|
|
#include <linux/can.h>
|
|
|
|
/* af_can rx dispatcher structures */
|
|
|
|
struct receiver {
|
|
struct hlist_node list;
|
|
struct rcu_head rcu;
|
|
canid_t can_id;
|
|
canid_t mask;
|
|
unsigned long matches;
|
|
void (*func)(struct sk_buff *, void *);
|
|
void *data;
|
|
char *ident;
|
|
};
|
|
|
|
enum { RX_ERR, RX_ALL, RX_FIL, RX_INV, RX_EFF, RX_MAX };
|
|
|
|
struct dev_rcv_lists {
|
|
struct hlist_node list;
|
|
struct rcu_head rcu;
|
|
struct net_device *dev;
|
|
struct hlist_head rx[RX_MAX];
|
|
struct hlist_head rx_sff[0x800];
|
|
int remove_on_zero_entries;
|
|
int entries;
|
|
};
|
|
|
|
/* statistic structures */
|
|
|
|
/* can be reset e.g. by can_init_stats() */
|
|
struct s_stats {
|
|
unsigned long jiffies_init;
|
|
|
|
unsigned long rx_frames;
|
|
unsigned long tx_frames;
|
|
unsigned long matches;
|
|
|
|
unsigned long total_rx_rate;
|
|
unsigned long total_tx_rate;
|
|
unsigned long total_rx_match_ratio;
|
|
|
|
unsigned long current_rx_rate;
|
|
unsigned long current_tx_rate;
|
|
unsigned long current_rx_match_ratio;
|
|
|
|
unsigned long max_rx_rate;
|
|
unsigned long max_tx_rate;
|
|
unsigned long max_rx_match_ratio;
|
|
|
|
unsigned long rx_frames_delta;
|
|
unsigned long tx_frames_delta;
|
|
unsigned long matches_delta;
|
|
};
|
|
|
|
/* persistent statistics */
|
|
struct s_pstats {
|
|
unsigned long stats_reset;
|
|
unsigned long user_reset;
|
|
unsigned long rcv_entries;
|
|
unsigned long rcv_entries_max;
|
|
};
|
|
|
|
/* function prototypes for the CAN networklayer procfs (proc.c) */
|
|
extern void can_init_proc(void);
|
|
extern void can_remove_proc(void);
|
|
extern void can_stat_update(unsigned long data);
|
|
|
|
/* structures and variables from af_can.c needed in proc.c for reading */
|
|
extern struct timer_list can_stattimer; /* timer for statistics update */
|
|
extern struct s_stats can_stats; /* packet statistics */
|
|
extern struct s_pstats can_pstats; /* receive list statistics */
|
|
extern struct hlist_head can_rx_dev_list; /* rx dispatcher structures */
|
|
|
|
#endif /* AF_CAN_H */
|