389 lines
14 KiB
C
389 lines
14 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
/*
|
|
* 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 used by the ARCnet driver.
|
|
*
|
|
* Authors: Avery Pennarun and David Woodhouse
|
|
*/
|
|
#ifndef _LINUX_ARCDEVICE_H
|
|
#define _LINUX_ARCDEVICE_H
|
|
|
|
#include <asm/timex.h>
|
|
#include <linux/if_arcnet.h>
|
|
|
|
#ifdef __KERNEL__
|
|
#include <linux/interrupt.h>
|
|
|
|
/*
|
|
* RECON_THRESHOLD is the maximum number of RECON messages to receive
|
|
* within one minute before printing a "cabling problem" warning. 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 high.
|
|
*/
|
|
#define TX_TIMEOUT (HZ * 200 / 1000)
|
|
|
|
/* Display warnings about the driver being an ALPHA version. */
|
|
#undef ALPHA_WARNING
|
|
|
|
/*
|
|
* Debugging bitflags: each option can be enabled individually.
|
|
*
|
|
* 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 */
|
|
#define D_RECON 32 /* print a message whenever token is lost */
|
|
#define D_PROTO 64 /* debug auto-protocol support */
|
|
/* debug levels below give LOTS of output during normal operation! */
|
|
#define D_DURING 128 /* trace operations (including irq's) */
|
|
#define D_TX 256 /* show tx packets */
|
|
#define D_RX 512 /* show rx packets */
|
|
#define D_SKB 1024 /* show skb's */
|
|
#define D_SKB_SIZE 2048 /* show skb sizes */
|
|
#define D_TIMING 4096 /* show time needed to copy buffers to card */
|
|
#define D_DEBUG 8192 /* Very detailed debug line for line */
|
|
|
|
#ifndef ARCNET_DEBUG_MAX
|
|
#define ARCNET_DEBUG_MAX (127) /* change to ~0 if you want detailed debugging */
|
|
#endif
|
|
|
|
#ifndef ARCNET_DEBUG
|
|
#define ARCNET_DEBUG (D_NORMAL | D_EXTRA)
|
|
#endif
|
|
extern int arcnet_debug;
|
|
|
|
#define BUGLVL(x) ((x) & ARCNET_DEBUG_MAX & arcnet_debug)
|
|
|
|
/* macros to simplify debug checking */
|
|
#define arc_printk(x, dev, fmt, ...) \
|
|
do { \
|
|
if (BUGLVL(x)) { \
|
|
if ((x) == D_NORMAL) \
|
|
netdev_warn(dev, fmt, ##__VA_ARGS__); \
|
|
else if ((x) < D_DURING) \
|
|
netdev_info(dev, fmt, ##__VA_ARGS__); \
|
|
else \
|
|
netdev_dbg(dev, fmt, ##__VA_ARGS__); \
|
|
} \
|
|
} while (0)
|
|
|
|
#define arc_cont(x, fmt, ...) \
|
|
do { \
|
|
if (BUGLVL(x)) \
|
|
pr_cont(fmt, ##__VA_ARGS__); \
|
|
} while (0)
|
|
|
|
/* see how long a function call takes to run, expressed in CPU cycles */
|
|
#define TIME(dev, name, bytes, call) \
|
|
do { \
|
|
if (BUGLVL(D_TIMING)) { \
|
|
unsigned long _x, _y; \
|
|
_x = get_cycles(); \
|
|
call; \
|
|
_y = get_cycles(); \
|
|
arc_printk(D_TIMING, dev, \
|
|
"%s: %d bytes in %lu cycles == %lu Kbytes/100Mcycle\n", \
|
|
name, bytes, _y - _x, \
|
|
100000000 / 1024 * bytes / (_y - _x + 1)); \
|
|
} else { \
|
|
call; \
|
|
} \
|
|
} while (0)
|
|
|
|
/*
|
|
* Time needed to reset the card - in ms (milliseconds). This works on my
|
|
* SMC PC100. I can't find a reference that tells me just how long I
|
|
* should wait.
|
|
*/
|
|
#define RESETtime (300)
|
|
|
|
/*
|
|
* These are the max/min lengths of packet payload, not including the
|
|
* arc_hardware header, but definitely including the soft header.
|
|
*
|
|
* Note: packet sizes 254, 255, 256 are impossible because of the way
|
|
* ARCnet registers work That's why RFC1201 defines "exception" packets.
|
|
* In non-RFC1201 protocols, we have to just tack some extra bytes on the
|
|
* end.
|
|
*/
|
|
#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 /* network reconfigured */
|
|
#define TESTflag 0x08 /* test flag */
|
|
#define EXCNAKflag 0x08 /* excesive nak 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 */
|
|
#define STARTIOcmd 0x18 /* start internal operation */
|
|
|
|
/* flags for "clear flags" command */
|
|
#define RESETclear 0x08 /* power-on-reset */
|
|
#define CONFIGclear 0x10 /* system reconfigured */
|
|
|
|
#define EXCNAKclear 0x0E /* Clear and acknowledge the excive nak bit */
|
|
|
|
/* 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 */
|
|
|
|
/* card feature flags, set during auto-detection.
|
|
* (currently only used by com20020pci)
|
|
*/
|
|
#define ARC_IS_5MBIT 1 /* card default speed is 5MBit */
|
|
#define ARC_CAN_10MBIT 2 /* card uses COM20022, supporting 10MBit,
|
|
but default is 2.5MBit. */
|
|
|
|
/* information needed to define an encapsulation driver */
|
|
struct ArcProto {
|
|
char suffix; /* a for RFC1201, e for ether-encap, etc. */
|
|
int mtu; /* largest possible packet */
|
|
int is_ip; /* This is a ip plugin - not a raw thing */
|
|
|
|
void (*rx)(struct net_device *dev, int bufnum,
|
|
struct archdr *pkthdr, int length);
|
|
int (*build_header)(struct sk_buff *skb, struct net_device *dev,
|
|
unsigned short ethproto, uint8_t daddr);
|
|
|
|
/* these functions return '1' if the skb can now be freed */
|
|
int (*prepare_tx)(struct net_device *dev, struct archdr *pkt,
|
|
int length, int bufnum);
|
|
int (*continue_tx)(struct net_device *dev, int bufnum);
|
|
int (*ack_tx)(struct net_device *dev, int acked);
|
|
};
|
|
|
|
extern struct ArcProto *arc_proto_map[256], *arc_proto_default,
|
|
*arc_bcast_proto, *arc_raw_proto;
|
|
|
|
/*
|
|
* "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 */
|
|
__be16 sequence; /* sequence number of assembly */
|
|
uint8_t lastpacket, /* number of last packet (from 1) */
|
|
numpackets; /* number of packets in split */
|
|
};
|
|
|
|
/* only needed for RFC1201 */
|
|
struct Outgoing {
|
|
struct ArcProto *proto; /* protocol driver that owns this:
|
|
* if NULL, no packet is pending.
|
|
*/
|
|
struct sk_buff *skb; /* buffer from upper levels */
|
|
struct archdr *pkt; /* a pointer into the skb */
|
|
uint16_t length, /* bytes total */
|
|
dataleft, /* bytes left */
|
|
segnum, /* segment being sent */
|
|
numsegs; /* number of segments */
|
|
};
|
|
|
|
#define ARCNET_LED_NAME_SZ (IFNAMSIZ + 6)
|
|
|
|
struct arcnet_local {
|
|
uint8_t config, /* current value of CONFIG register */
|
|
timeout, /* Extended timeout for COM20020 */
|
|
backplane, /* Backplane flag for COM20020 */
|
|
clockp, /* COM20020 clock divider */
|
|
clockm, /* COM20020 clock multiplier flag */
|
|
setup, /* Contents of setup1 register */
|
|
setup2, /* Contents of setup2 register */
|
|
intmask; /* current value of INTMASK register */
|
|
uint8_t default_proto[256]; /* default encap to use for each host */
|
|
int cur_tx, /* buffer used by current transmit, or -1 */
|
|
next_tx, /* buffer where a packet is ready to send */
|
|
cur_rx; /* current receive buffer */
|
|
int lastload_dest, /* can last loaded packet be acked? */
|
|
lasttrans_dest; /* can last TX'd packet be acked? */
|
|
int timed_out; /* need to process TX timeout and drop packet */
|
|
unsigned long last_timeout; /* time of last reported timeout */
|
|
char *card_name; /* card ident string */
|
|
int card_flags; /* special card features */
|
|
|
|
/* On preemtive and SMB a lock is needed */
|
|
spinlock_t lock;
|
|
|
|
struct led_trigger *tx_led_trig;
|
|
char tx_led_trig_name[ARCNET_LED_NAME_SZ];
|
|
struct led_trigger *recon_led_trig;
|
|
char recon_led_trig_name[ARCNET_LED_NAME_SZ];
|
|
|
|
struct timer_list timer;
|
|
|
|
struct net_device *dev;
|
|
int reply_status;
|
|
struct tasklet_struct reply_tasklet;
|
|
|
|
/*
|
|
* Buffer management: an ARCnet card has 4 x 512-byte buffers, each of
|
|
* which can be used for either sending or receiving. The new dynamic
|
|
* buffer management routines use a simple circular queue of available
|
|
* buffers, and take them as they're needed. This way, we simplify
|
|
* situations in which we (for example) want to pre-load a transmit
|
|
* buffer, or start receiving while we copy a received packet to
|
|
* memory.
|
|
*
|
|
* The rules: only the interrupt handler is allowed to _add_ buffers to
|
|
* the queue; thus, this doesn't require a lock. Both the interrupt
|
|
* handler and the transmit function will want to _remove_ buffers, so
|
|
* we need to handle the situation where they try to do it at the same
|
|
* time.
|
|
*
|
|
* If next_buf == first_free_buf, the queue is empty. Since there are
|
|
* only four possible buffers, the queue should never be full.
|
|
*/
|
|
atomic_t buf_lock;
|
|
int buf_queue[5];
|
|
int next_buf, first_free_buf;
|
|
|
|
/* network "reconfiguration" handling */
|
|
unsigned long first_recon; /* time of "first" RECON message to count */
|
|
unsigned long last_recon; /* time of most recent RECON */
|
|
int num_recons; /* number of RECONs between first and last. */
|
|
int network_down; /* do we think the network is down? */
|
|
|
|
int excnak_pending; /* We just got an excesive nak interrupt */
|
|
|
|
struct {
|
|
uint16_t sequence; /* sequence number (incs with each packet) */
|
|
__be16 aborted_seq;
|
|
|
|
struct Incoming incoming[256]; /* one from each address */
|
|
} rfc1201;
|
|
|
|
/* really only used by rfc1201, but we'll pretend it's not */
|
|
struct Outgoing outgoing; /* packet currently being sent */
|
|
|
|
/* hardware-specific functions */
|
|
struct {
|
|
struct module *owner;
|
|
void (*command)(struct net_device *dev, int cmd);
|
|
int (*status)(struct net_device *dev);
|
|
void (*intmask)(struct net_device *dev, int mask);
|
|
int (*reset)(struct net_device *dev, int really_reset);
|
|
void (*open)(struct net_device *dev);
|
|
void (*close)(struct net_device *dev);
|
|
void (*datatrigger) (struct net_device * dev, int enable);
|
|
void (*recontrigger) (struct net_device * dev, int enable);
|
|
|
|
void (*copy_to_card)(struct net_device *dev, int bufnum,
|
|
int offset, void *buf, int count);
|
|
void (*copy_from_card)(struct net_device *dev, int bufnum,
|
|
int offset, void *buf, int count);
|
|
} hw;
|
|
|
|
void __iomem *mem_start; /* pointer to ioremap'ed MMIO */
|
|
};
|
|
|
|
enum arcnet_led_event {
|
|
ARCNET_LED_EVENT_RECON,
|
|
ARCNET_LED_EVENT_OPEN,
|
|
ARCNET_LED_EVENT_STOP,
|
|
ARCNET_LED_EVENT_TX,
|
|
};
|
|
|
|
void arcnet_led_event(struct net_device *netdev, enum arcnet_led_event event);
|
|
void devm_arcnet_led_init(struct net_device *netdev, int index, int subid);
|
|
|
|
#if ARCNET_DEBUG_MAX & D_SKB
|
|
void arcnet_dump_skb(struct net_device *dev, struct sk_buff *skb, char *desc);
|
|
#else
|
|
static inline
|
|
void arcnet_dump_skb(struct net_device *dev, struct sk_buff *skb, char *desc)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
void arcnet_unregister_proto(struct ArcProto *proto);
|
|
irqreturn_t arcnet_interrupt(int irq, void *dev_id);
|
|
struct net_device *alloc_arcdev(const char *name);
|
|
|
|
int arcnet_open(struct net_device *dev);
|
|
int arcnet_close(struct net_device *dev);
|
|
netdev_tx_t arcnet_send_packet(struct sk_buff *skb,
|
|
struct net_device *dev);
|
|
void arcnet_timeout(struct net_device *dev);
|
|
|
|
/* I/O equivalents */
|
|
|
|
#ifdef CONFIG_SA1100_CT6001
|
|
#define BUS_ALIGN 2 /* 8 bit device on a 16 bit bus - needs padding */
|
|
#else
|
|
#define BUS_ALIGN 1
|
|
#endif
|
|
|
|
/* addr and offset allow register like names to define the actual IO address.
|
|
* A configuration option multiplies the offset for alignment.
|
|
*/
|
|
#define arcnet_inb(addr, offset) \
|
|
inb((addr) + BUS_ALIGN * (offset))
|
|
#define arcnet_outb(value, addr, offset) \
|
|
outb(value, (addr) + BUS_ALIGN * (offset))
|
|
|
|
#define arcnet_insb(addr, offset, buffer, count) \
|
|
insb((addr) + BUS_ALIGN * (offset), buffer, count)
|
|
#define arcnet_outsb(addr, offset, buffer, count) \
|
|
outsb((addr) + BUS_ALIGN * (offset), buffer, count)
|
|
|
|
#define arcnet_readb(addr, offset) \
|
|
readb((addr) + (offset))
|
|
#define arcnet_writeb(value, addr, offset) \
|
|
writeb(value, (addr) + (offset))
|
|
|
|
#endif /* __KERNEL__ */
|
|
#endif /* _LINUX_ARCDEVICE_H */
|