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/*
* INET An implementation of the TCP/IP protocol suite for the LINUX
* operating system. NET is implemented using the BSD Socket
* interface as the means of communication with the user level.
*
* Definitions for the ARCnet handlers.
*
* Version: $Id: arcdevice.h,v 1.3 1997/11/09 11:05:05 mj Exp $
*
* Authors: Avery Pennarun <apenwarr@bond.net>
* David Woodhouse <dwmw2@cam.ac.uk>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
*/
#ifndef _LINUX_ARCDEVICE_H
#define _LINUX_ARCDEVICE_H
#include <linux/config.h>
#include <linux/if_arcnet.h>
#ifdef __KERNEL__
#define ARC_20020 1
#define ARC_RIM_I 2
#define ARC_90xx 3
#define ARC_90xx_IO 4
#define MAX_ARCNET_DEVS 8
/* The card sends the reconfiguration signal when it loses the connection to
* the rest of its network. It is a 'Hello, is anybody there?' cry. This
* usually happens when a new computer on the network is powered on or when
* the cable is broken.
*
* Define DETECT_RECONFIGS if you want to detect network reconfigurations.
* Recons may be a real nuisance on a larger ARCnet network; if you are a
* network administrator you probably would like to count them.
* Reconfigurations will be recorded in stats.tx_carrier_errors (the last
* field of the /proc/net/dev file).
*
* Define SHOW_RECONFIGS if you really want to see a log message whenever
* a RECON occurs.
*/
#define DETECT_RECONFIGS
#undef SHOW_RECONFIGS
/* RECON_THRESHOLD is the maximum number of RECON messages to receive within
* one minute before printing a "cabling problem" warning. You must have
* DETECT_RECONFIGS enabled if you want to use this. The default value
* should be fine.
*
* After that, a "cabling restored" message will be printed on the next IRQ
* if no RECON messages have been received for 10 seconds.
*
* Do not define RECON_THRESHOLD at all if you want to disable this feature.
*/
#define RECON_THRESHOLD 30
/* Define this to the minimum "timeout" value. If a transmit takes longer
* than TX_TIMEOUT jiffies, Linux will abort the TX and retry. On a large
* network, or one with heavy network traffic, this timeout may need to be
* increased. The larger it is, though, the longer it will be between
* necessary transmits - don't set this too large.
*/
#define TX_TIMEOUT (20*HZ/100)
/* Display warnings about the driver being an ALPHA version.
*/
#undef ALPHA_WARNING
/* New debugging bitflags: each option can be enabled individually.
*
* These can be set while the driver is running by typing:
* ifconfig arc0 down metric 1xxx HOSTNAME
* where 1xxx is 1000 + the debug level you want
* and HOSTNAME is your hostname/ip address
* and then resetting your routes.
*
* An ioctl() should be used for this instead, someday.
*
* Note: only debug flags included in the ARCNET_DEBUG_MAX define will
* actually be available. GCC will (at least, GCC 2.7.0 will) notice
* lines using a BUGLVL not in ARCNET_DEBUG_MAX and automatically optimize
* them out.
*/
#define D_NORMAL 1 /* important operational info */
#define D_EXTRA 2 /* useful, but non-vital information */
#define D_INIT 4 /* show init/probe messages */
#define D_INIT_REASONS 8 /* show reasons for discarding probes */
/* debug levels below give LOTS of output during normal operation! */
#define D_DURING 16 /* trace operations (including irq's) */
#define D_TX 32 /* show tx packets */
#define D_RX 64 /* show rx packets */
#define D_SKB 128 /* show skb's */
#ifndef ARCNET_DEBUG_MAX
#define ARCNET_DEBUG_MAX (~0) /* enable ALL debug messages */
#endif
#ifndef ARCNET_DEBUG
#define ARCNET_DEBUG (D_NORMAL|D_EXTRA)
#endif
extern int arcnet_debug;
/* macros to simplify debug checking */
#define BUGLVL(x) if ((ARCNET_DEBUG_MAX)&arcnet_debug&(x))
#define BUGMSG2(x,msg,args...) do { BUGLVL(x) printk(msg, ## args); } while (0)
#define BUGMSG(x,msg,args...) \
BUGMSG2(x,"%s%6s: " msg, \
x==D_NORMAL ? KERN_WARNING : \
x<=D_INIT_REASONS ? KERN_INFO : KERN_DEBUG , \
dev->name , ## args)
#define SETMASK AINTMASK(lp->intmask)
/* Time needed to resetthe card - in jiffies. This works on my SMC
* PC100. I can't find a reference that tells me just how long I
* should wait.
*/
#define RESETtime (HZ * 3 / 10) /* reset */
/* these are the max/min lengths of packet data. (including
* ClientData header)
* note: packet sizes 250, 251, 252 are impossible (God knows why)
* so exception packets become necessary.
*
* These numbers are compared with the length of the full packet,
* including ClientData header.
*/
#define MTU 253 /* normal packet max size */
#define MinTU 257 /* extended packet min size */
#define XMTU 508 /* extended packet max size */
/* status/interrupt mask bit fields */
#define TXFREEflag 0x01 /* transmitter available */
#define TXACKflag 0x02 /* transmitted msg. ackd */
#define RECONflag 0x04 /* system reconfigured */
#define TESTflag 0x08 /* test flag */
#define RESETflag 0x10 /* power-on-reset */
#define RES1flag 0x20 /* reserved - usually set by jumper */
#define RES2flag 0x40 /* reserved - usually set by jumper */
#define NORXflag 0x80 /* receiver inhibited */
/* Flags used for IO-mapped memory operations */
#define AUTOINCflag 0x40 /* Increase location with each access */
#define IOMAPflag 0x02 /* (for 90xx) Use IO mapped memory, not mmap */
#define ENABLE16flag 0x80 /* (for 90xx) Enable 16-bit mode */
/* in the command register, the following bits have these meanings:
* 0-2 command
* 3-4 page number (for enable rcv/xmt command)
* 7 receive broadcasts
*/
#define NOTXcmd 0x01 /* disable transmitter */
#define NORXcmd 0x02 /* disable receiver */
#define TXcmd 0x03 /* enable transmitter */
#define RXcmd 0x04 /* enable receiver */
#define CONFIGcmd 0x05 /* define configuration */
#define CFLAGScmd 0x06 /* clear flags */
#define TESTcmd 0x07 /* load test flags */
/* flags for "clear flags" command */
#define RESETclear 0x08 /* power-on-reset */
#define CONFIGclear 0x10 /* system reconfigured */
/* flags for "load test flags" command */
#define TESTload 0x08 /* test flag (diagnostic) */
/* byte deposited into first address of buffers on reset */
#define TESTvalue 0321 /* that's octal for 0xD1 :) */
/* for "enable receiver" command */
#define RXbcasts 0x80 /* receive broadcasts */
/* flags for "define configuration" command */
#define NORMALconf 0x00 /* 1-249 byte packets */
#define EXTconf 0x08 /* 250-504 byte packets */
/* Starts receiving packets into recbuf.
*/
#define EnableReceiver() ACOMMAND(RXcmd|(recbuf<<3)|RXbcasts)
#define JIFFER(time) for (delayval=jiffies+time; time_before(jiffies,delayval);) ;
/* a complete ARCnet packet */
union ArcPacket
{
struct archdr hardheader; /* the hardware header */
u_char raw[512]; /* raw packet info, incl ClientData */
};
/* the "client data" header - RFC1201 information
* notice that this screws up if it's not an even number of bytes
* <sigh>
*/
struct ClientData
{
/* data that's NOT part of real packet - we MUST get rid of it before
* actually sending!!
*/
u_char saddr, /* Source address - needed for IPX */
daddr; /* Destination address */
/* data that IS part of real packet */
u_char protocol_id, /* ARC_P_IP, ARC_P_ARP, etc */
split_flag; /* for use with split packets */
u_short sequence; /* sequence number */
};
#define EXTRA_CLIENTDATA (sizeof(struct ClientData)-4)
/* the "client data" header - RFC1051 information
* this also screws up if it's not an even number of bytes
* <sigh again>
*/
struct S_ClientData
{
/* data that's NOT part of real packet - we MUST get rid of it before
* actually sending!!
*/
u_char saddr, /* Source address - needed for IPX */
daddr, /* Destination address */
junk; /* padding to make an even length */
/* data that IS part of real packet */
u_char protocol_id; /* ARC_P_IP, ARC_P_ARP, etc */
};
#define S_EXTRA_CLIENTDATA (sizeof(struct S_ClientData)-1)
/* "Incoming" is information needed for each address that could be sending
* to us. Mostly for partially-received split packets.
*/
struct Incoming
{
struct sk_buff *skb; /* packet data buffer */
unsigned char lastpacket, /* number of last packet (from 1) */
numpackets; /* number of packets in split */
u_short sequence; /* sequence number of assembly */
};
struct Outgoing
{
struct sk_buff *skb; /* buffer from upper levels */
struct ClientData *hdr; /* clientdata of last packet */
u_char *data; /* pointer to data in packet */
short length, /* bytes total */
dataleft, /* bytes left */
segnum, /* segment being sent */
numsegs, /* number of segments */
seglen; /* length of segment */
};
struct arcnet_local {
struct net_device_stats stats;
u_short sequence; /* sequence number (incs with each packet) */
u_short aborted_seq;
u_char stationid, /* our 8-bit station address */
recbuf, /* receive buffer # (0 or 1) */
txbuf, /* transmit buffer # (2 or 3) */
txready, /* buffer where a packet is ready to send */
config, /* current value of CONFIG register */
timeout, /* Extended timeout for COM20020 */
backplane, /* Backplane flag for COM20020 */
setup, /* Contents of setup register */
intmask; /* current value of INTMASK register */
short intx, /* in TX routine? */
in_txhandler, /* in TX_IRQ handler? */
sending, /* transmit in progress? */
lastload_dest, /* can last loaded packet be acked? */
lasttrans_dest; /* can last TX'd packet be acked? */
#if defined(DETECT_RECONFIGS) && defined(RECON_THRESHOLD)
time_t first_recon, /* time of "first" RECON message to count */
last_recon; /* time of most recent RECON */
int num_recons, /* number of RECONs between first and last. */
network_down; /* do we think the network is down? */
#endif
struct timer_list timer; /* the timer interrupt struct */
struct Incoming incoming[256]; /* one from each address */
struct Outgoing outgoing; /* packet currently being sent */
int card_type;
char *card_type_str;
void (*inthandler) (struct device *dev);
int (*arcnet_reset) (struct device *dev, int reset_delay);
void (*asetmask) (struct device *dev, u_char mask);
void (*acommand) (struct device *dev, u_char command);
u_char (*astatus) (struct device *dev);
void (*en_dis_able_TX) (struct device *dev, int enable);
void (*prepare_tx)(struct device *dev,u_char *hdr,int hdrlen,
char *data,int length,int daddr,int exceptA, int offset);
void (*openclose_device)(int open);
struct device *adev; /* RFC1201 protocol device */
/* These are last to ensure that the chipset drivers don't depend on the
* CONFIG_ARCNET_ETH and CONFIG_ARCNET_1051 options.
*/
#ifdef CONFIG_ARCNET_ETH
struct device *edev; /* Ethernet-Encap device */
#endif
#ifdef CONFIG_ARCNET_1051
struct device *sdev; /* RFC1051 protocol device */
#endif
};
/* Functions exported by arcnet.c
*/
#if ARCNET_DEBUG_MAX & D_SKB
extern void arcnet_dump_skb(struct device *dev,struct sk_buff *skb,
char *desc);
#else
#define arcnet_dump_skb(dev,skb,desc) ;
#endif
#if (ARCNET_DEBUG_MAX & D_RX) || (ARCNET_DEBUG_MAX & D_TX)
extern void arcnet_dump_packet(struct device *dev,u_char *buffer,int ext,
char *desc);
#else
#define arcnet_dump_packet(dev,buffer,ext,desc) ;
#endif
extern void arcnet_tx_done(struct device *dev, struct arcnet_local *lp);
extern void arcnet_makename(char *device);
extern void arcnet_interrupt(int irq,void *dev_id,struct pt_regs *regs);
extern void arcnet_setup(struct device *dev);
extern int arcnet_go_tx(struct device *dev,int enable_irq);
extern void arcnetA_continue_tx(struct device *dev);
extern void arcnet_rx(struct arcnet_local *lp, u_char *arcsoft, short length, int saddr, int daddr);
extern void arcnet_use_count(int open);
#endif /* __KERNEL__ */
#endif /* _LINUX_ARCDEVICE_H */
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