patch-2.3.21 linux/drivers/net/cycx_x25.c
Next file: linux/drivers/net/dlci.c
Previous file: linux/drivers/net/cycx_main.c
Back to the patch index
Back to the overall index
- Lines: 1489
- Date:
Wed Dec 31 16:00:00 1969
- Orig file:
v2.3.20/linux/drivers/net/cycx_x25.c
- Orig date:
Wed Aug 18 11:36:41 1999
diff -u --recursive --new-file v2.3.20/linux/drivers/net/cycx_x25.c linux/drivers/net/cycx_x25.c
@@ -1,1488 +0,0 @@
-/*
-* cycx_x25.c CYCLOM X Multiprotocol WAN Link Driver. X.25 module.
-*
-* Author: Arnaldo Carvalho de Melo <acme@conectiva.com.br>
-* Copyright: (c) 1998, 1999 Arnaldo Carvalho de Melo
-*
-* Based on sdla_x25.c by Gene Kozin <genek@compuserve.com>
-*
-* 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.
-* ============================================================================
-* 1999/08/10 acme serialized access to the card thru a spinlock
-* in x25_exec
-* 1999/08/09 acme removed per channel spinlocks
-* removed references to enable_tx_int
-* 1999/05/28 acme fixed nibble_to_byte, ackvc now properly treated
-* if_send simplified
-* 1999/05/25 acme fixed t1, t2, t21 & t23 configuration
-* use spinlocks instead of cli/sti in some points
-* 1999/05/24 acme finished the x25_get_stat function
-* 1999/05/23 acme dev->type = ARPHRD_X25 (tcpdump only works,
-* AFAIT, with ARPHRD_ETHER). This seems to be
-* needed to use socket(AF_X25)...
-* Now the config file must specify a peer media
-* address for svc channes over a crossover cable.
-* Removed hold_timeout from x25_channel_t,
-* not used.
-* A little enhancement in the DEBUG processing
-* 1999/05/22 acme go to DISCONNECTED in disconnect_confirm_intr,
-* instead of chan_disc.
-* 1999/05/16 marcelo fixed timer initialization in SVCs
-* 1999/01/05 acme x25_configure now get (most of) all
-* parameters...
-* 1999/01/05 acme pktlen now (correctly) uses log2 (value
-* configured)
-* 1999/01/03 acme judicious use of data types (u8, u16, u32, etc)
-* 1999/01/03 acme cyx_isr: reset dpmbase to acknowledge
-* indication (interrupt from cyclom 2x)
-* 1999/01/02 acme cyx_isr: first hackings...
-* 1999/01/0203 acme when initializing an array don't give less
-* elements than declared...
-* example: char send_cmd[6] = "?\xFF\x10";
-* you'll gonna lose a couple hours, 'cause your
-* brain won't admit that there's an error in the
-* above declaration... the side effect is that
-* memset is put into the unresolved symbols
-* instead of using the inline memset functions...
-* 1999/01/02 acme began chan_connect, chan_send, x25_send
-* Dec 31, 1998 Arnaldo x25_configure
-* this code can be compiled as non module
-* Dec 27, 1998 Arnaldo code cleanup
-* IPX code wiped out! let's decrease code
-* complexity for now, remember: I'm learning! :)
-* bps_to_speed_code OK
-* Dec 26, 1998 Arnaldo Minimal debug code cleanup
-* Aug 08, 1998 Arnaldo Initial version.
-*/
-#define CYCLOMX_X25_DEBUG 1
-
-#include <linux/version.h>
-#include <linux/kernel.h> /* printk(), and other useful stuff */
-#include <linux/stddef.h> /* offsetof(), etc. */
-#include <linux/errno.h> /* return codes */
-#include <linux/string.h> /* inline memset(), etc. */
-#include <linux/malloc.h> /* kmalloc(), kfree() */
-#include <linux/wanrouter.h> /* WAN router definitions */
-#include <asm/byteorder.h> /* htons(), etc. */
-#include <linux/if_arp.h> /* ARPHRD_X25 */
-#include <linux/cyclomx.h> /* CYCLOM X common user API definitions */
-#include <linux/cycx_x25.h> /* X.25 firmware API definitions */
-
-/* Defines & Macros */
-#define MAX_CMD_RETRY 5
-#define X25_CHAN_MTU 2048 /* unfragmented logical channel MTU */
-
-/* Data Structures */
-/* This is an extention of the 'struct net_device' we create for each network
- interface to keep the rest of X.25 channel-specific data. */
-typedef struct x25_channel {
- char name[WAN_IFNAME_SZ+1]; /* interface name, ASCIIZ */
- char addr[WAN_ADDRESS_SZ+1]; /* media address, ASCIIZ */
- char *local_addr; /* local media address, ASCIIZ -
- svc thru crossover cable */
- s16 lcn; /* logical channel number/conn.req.key*/
- u8 link;
- struct timer_list timer; /* timer used for svc channel disc. */
- u16 protocol; /* ethertype, 0 - multiplexed */
- u8 svc; /* 0 - permanent, 1 - switched */
- u8 state; /* channel state */
- u8 drop_sequence; /* mark sequence for dropping */
- u32 idle_tmout; /* sec, before disconnecting */
- struct sk_buff *rx_skb; /* receive socket buffer */
- cycx_t *card; /* -> owner */
- struct enet_statistics ifstats; /* interface statistics */
-} x25_channel_t;
-
-/* Function Prototypes */
-/* WAN link driver entry points. These are called by the WAN router module. */
-static int update (wan_device_t *wandev),
- new_if (wan_device_t *wandev, struct net_device *dev,wanif_conf_t *conf),
- del_if (wan_device_t *wandev, struct net_device *dev);
-
-/* Network device interface */
-static int if_init (struct net_device *dev),
- if_open (struct net_device *dev),
- if_close (struct net_device *dev),
- if_header (struct sk_buff *skb, struct net_device *dev,
- u16 type, void *daddr, void *saddr, unsigned len),
- if_rebuild_hdr (struct sk_buff *skb),
- if_send (struct sk_buff *skb, struct net_device *dev);
-
-static struct net_device_stats * if_stats (struct net_device *dev);
-
-/* Interrupt handlers */
-static void cyx_isr (cycx_t *card),
- tx_intr (cycx_t *card, TX25Cmd *cmd),
- rx_intr (cycx_t *card, TX25Cmd *cmd),
- log_intr (cycx_t *card, TX25Cmd *cmd),
- stat_intr (cycx_t *card, TX25Cmd *cmd),
- connect_confirm_intr (cycx_t *card, TX25Cmd *cmd),
- disconnect_confirm_intr (cycx_t *card, TX25Cmd *cmd),
- connect_intr (cycx_t *card, TX25Cmd *cmd),
- disconnect_intr (cycx_t *card, TX25Cmd *cmd),
- spur_intr (cycx_t *card, TX25Cmd *cmd);
-
-/* X.25 firmware interface functions */
-static int x25_configure (cycx_t *card, TX25Config *conf),
- x25_get_stats (cycx_t *card),
- x25_send (cycx_t *card, u8 link, u8 lcn, u8 bitm, int len,void *buf),
- x25_connect_response (cycx_t *card, x25_channel_t *chan),
- x25_disconnect_response (cycx_t *card, u8 link, u8 lcn);
-
-/* Miscellaneous functions */
-static int chan_connect (struct net_device *dev),
- chan_send (struct net_device *dev, struct sk_buff *skb);
-
-static void set_chan_state (struct net_device *dev, u8 state),
- nibble_to_byte (u8 *s, u8 *d, u8 len, u8 nibble),
- reset_timer (struct net_device *dev),
- chan_disc (struct net_device *dev),
- chan_timer (unsigned long d);
-
-static u8 bps_to_speed_code (u32 bps);
-static u8 log2 (u32 n);
-
-static unsigned dec_to_uint (u8 *str, int len);
-
-static struct net_device *get_dev_by_lcn (wan_device_t *wandev, s16 lcn);
-static struct net_device *get_dev_by_dte_addr (wan_device_t *wandev, char *dte);
-
-#ifdef CYCLOMX_X25_DEBUG
-static void hex_dump(char *msg, unsigned char *p, int len);
-static void x25_dump_config(TX25Config *conf);
-static void x25_dump_stats(TX25Stats *stats);
-static void x25_dump_devs(wan_device_t *wandev);
-#define dprintk(format, a...) printk(format, ##a)
-#else
-#define hex_dump(msg, p, len)
-#define x25_dump_config(conf)
-#define x25_dump_stats(stats)
-#define x25_dump_devs(wandev)
-#define dprintk(format, a...)
-#endif
-/* Public Functions */
-
-/* X.25 Protocol Initialization routine.
- *
- * This routine is called by the main CYCLOM X module during setup. At this
- * point adapter is completely initialized and X.25 firmware is running.
- * o read firmware version (to make sure it's alive)
- * o configure adapter
- * o initialize protocol-specific fields of the adapter data space.
- *
- * Return: 0 o.k.
- * < 0 failure. */
-int cyx_init (cycx_t *card, wandev_conf_t *conf)
-{
- TX25Config cfg;
-
- /* Verify configuration ID */
- if (conf->config_id != WANCONFIG_X25) {
- printk(KERN_INFO "%s: invalid configuration ID %u!\n",
- card->devname, conf->config_id);
- return -EINVAL;
- }
-
- /* Initialize protocol-specific fields */
- card->mbox = card->hw.dpmbase + X25_MBOX_OFFS;
- card->u.x.connection_keys = 0;
- card->u.x.lock = SPIN_LOCK_UNLOCKED;
-
- /* Configure adapter. Here we set resonable defaults, then parse
- * device configuration structure and set configuration options.
- * Most configuration options are verified and corrected (if
- * necessary) since we can't rely on the adapter to do so and don't
- * want it to fail either. */
- memset(&cfg, 0, sizeof(cfg));
- cfg.link = 0;
- cfg.clock = conf->clocking == WANOPT_EXTERNAL ? 8 : 55;
- cfg.speed = bps_to_speed_code(conf->bps);
- cfg.n3win = 7;
- cfg.n2win = 2;
- cfg.n2 = 5;
- cfg.nvc = 1;
- cfg.npvc = 1;
- cfg.flags = 0x02; /* default = V35 */
- cfg.t1 = 10; /* line carrier timeout */
- cfg.t2 = 29; /* tx timeout */
- cfg.t21 = 180; /* CALL timeout */
- cfg.t23 = 180; /* CLEAR timeout */
-
- /* adjust MTU */
- if (!conf->mtu || conf->mtu >= 512)
- card->wandev.mtu = 512;
- else if (conf->mtu >= 256)
- card->wandev.mtu = 256;
- else if (conf->mtu >= 128)
- card->wandev.mtu = 128;
- else
- card->wandev.mtu = 64;
-
- cfg.pktlen = log2(card->wandev.mtu);
-
- if (conf->station == WANOPT_DTE) {
- cfg.locaddr = 3; /* DTE */
- cfg.remaddr = 1; /* DCE */
- } else {
- cfg.locaddr = 1; /* DCE */
- cfg.remaddr = 3; /* DTE */
- }
-
- if (conf->interface == WANOPT_RS232)
- cfg.flags = 0; /* FIXME just reset the 2nd bit */
-
- if (conf->u.x25.hi_pvc) {
- card->u.x.hi_pvc = min(conf->u.x25.hi_pvc, 4095);
- card->u.x.lo_pvc = min(conf->u.x25.lo_pvc, card->u.x.hi_pvc);
- }
-
- if (conf->u.x25.hi_svc) {
- card->u.x.hi_svc = min(conf->u.x25.hi_svc, 4095);
- card->u.x.lo_svc = min(conf->u.x25.lo_svc, card->u.x.hi_svc);
- }
-
- if (card->u.x.lo_pvc == 255)
- cfg.npvc = 0;
- else
- cfg.npvc = card->u.x.hi_pvc - card->u.x.lo_pvc + 1;
-
- cfg.nvc = card->u.x.hi_svc - card->u.x.lo_svc + 1 + cfg.npvc;
-
- if (conf->u.x25.hdlc_window)
- cfg.n2win = min(conf->u.x25.hdlc_window, 7);
-
- if (conf->u.x25.pkt_window)
- cfg.n3win = min(conf->u.x25.pkt_window, 7);
-
- if (conf->u.x25.t1)
- cfg.t1 = min(conf->u.x25.t1, 30);
-
- if (conf->u.x25.t2)
- cfg.t2 = min(conf->u.x25.t2, 30);
-
- if (conf->u.x25.t11_t21)
- cfg.t21 = min(conf->u.x25.t11_t21, 30);
-
- if (conf->u.x25.t13_t23)
- cfg.t23 = min(conf->u.x25.t13_t23, 30);
-
- if (conf->u.x25.n2)
- cfg.n2 = min(conf->u.x25.n2, 30);
-
- /* initialize adapter */
- if (x25_configure(card, &cfg))
- return -EIO;
-
- /* Initialize protocol-specific fields of adapter data space */
- card->wandev.bps = conf->bps;
- card->wandev.interface = conf->interface;
- card->wandev.clocking = conf->clocking;
- card->wandev.station = conf->station;
- card->isr = &cyx_isr;
- card->exec = NULL;
- card->wandev.update = &update;
- card->wandev.new_if = &new_if;
- card->wandev.del_if = &del_if;
- card->wandev.state = WAN_DISCONNECTED;
- return 0;
-}
-
-/* WAN Device Driver Entry Points */
-/* Update device status & statistics. */
-static int update (wan_device_t *wandev)
-{
- /* sanity checks */
- if (!wandev || !wandev->private)
- return -EFAULT;
-
- if (wandev->state == WAN_UNCONFIGURED)
- return -ENODEV;
-
- x25_get_stats(wandev->private);
- return 0;
-}
-
-/* Create new logical channel.
- * This routine is called by the router when ROUTER_IFNEW IOCTL is being
- * handled.
- * o parse media- and hardware-specific configuration
- * o make sure that a new channel can be created
- * o allocate resources, if necessary
- * o prepare network device structure for registaration.
- *
- * Return: 0 o.k.
- * < 0 failure (channel will not be created) */
-static int new_if (wan_device_t *wandev, struct net_device *dev, wanif_conf_t *conf)
-{
- cycx_t *card = wandev->private;
- x25_channel_t *chan;
- int err = 0;
-
- if (conf->name[0] == '\0' || strlen(conf->name) > WAN_IFNAME_SZ) {
- printk(KERN_INFO "%s: invalid interface name!\n",card->devname);
- return -EINVAL;
- }
-
- /* allocate and initialize private data */
- if ((chan = kmalloc(sizeof(x25_channel_t), GFP_KERNEL)) == NULL)
- return -ENOMEM;
-
- memset(chan, 0, sizeof(x25_channel_t));
- strcpy(chan->name, conf->name);
- chan->card = card;
- chan->link = conf->port;
- chan->protocol = ETH_P_IP;
- chan->rx_skb = NULL;
- /* only used in svc connected thru crossover cable */
- chan->local_addr = NULL;
-
- if (conf->addr[0] == '@') { /* SVC */
- int len = strlen(conf->local_addr);
-
- if (len) {
- if (len > WAN_ADDRESS_SZ) {
- printk(KERN_ERR "%s: %s local addr too long!\n",
- wandev->name, chan->name);
- kfree(chan);
- return -EINVAL;
- } else {
- chan->local_addr = kmalloc(len + 1, GFP_KERNEL);
-
- if (!chan->local_addr) {
- kfree(chan);
- return ENOMEM;
- }
- }
-
- strncpy(chan->local_addr, conf->local_addr,
- WAN_ADDRESS_SZ);
- }
-
- chan->svc = 1;
- strncpy(chan->addr, &conf->addr[1], WAN_ADDRESS_SZ);
- init_timer(&chan->timer);
- chan->timer.function = chan_timer;
- chan->timer.data = (unsigned long) dev;
-
- /* Set channel timeouts (default if not specified) */
- chan->idle_tmout = conf->idle_timeout ? conf->idle_timeout : 90;
- } else if (is_digit(conf->addr[0])) { /* PVC */
- s16 lcn = dec_to_uint(conf->addr, 0);
-
- if (lcn >= card->u.x.lo_pvc && lcn <= card->u.x.hi_pvc)
- chan->lcn = lcn;
- else {
- printk(KERN_ERR
- "%s: PVC %u is out of range on interface %s!\n",
- wandev->name, lcn, chan->name);
- err = -EINVAL;
- }
- } else {
- printk(KERN_ERR "%s: invalid media address on interface %s!\n",
- wandev->name, chan->name);
- err = -EINVAL;
- }
-
- if (err) {
- if (chan->local_addr)
- kfree(chan->local_addr);
-
- kfree(chan);
- return err;
- }
-
- /* prepare network device data space for registration */
- dev->name = chan->name;
- dev->init = &if_init;
- dev->priv = chan;
- return 0;
-}
-
-/* Delete logical channel. */
-static int del_if (wan_device_t *wandev, struct net_device *dev)
-{
- if (!dev) {
- printk(KERN_ERR "cycx_x25:del_if:dev == NULL!\n");
- return 0;
- }
-
- if (dev->priv) {
- x25_channel_t *chan = dev->priv;
-
- if (chan->svc) {
- if (chan->local_addr)
- kfree(chan->local_addr);
-
- if (chan->state == WAN_CONNECTED)
- del_timer(&chan->timer);
- }
-
- kfree(chan);
- dev->priv = NULL;
- }
-
- return 0;
-}
-
-/* Network Device Interface */
-/* Initialize Linux network interface.
- *
- * This routine is called only once for each interface, during Linux network
- * interface registration. Returning anything but zero will fail interface
- * registration. */
-static int if_init (struct net_device *dev)
-{
- x25_channel_t *chan = dev->priv;
- cycx_t *card = chan->card;
- wan_device_t *wandev = &card->wandev;
-
- /* Initialize device driver entry points */
- dev->open = &if_open;
- dev->stop = &if_close;
- dev->hard_header = &if_header;
- dev->rebuild_header = &if_rebuild_hdr;
- dev->hard_start_xmit = &if_send;
- dev->get_stats = &if_stats;
-
- /* Initialize media-specific parameters */
- dev->mtu = X25_CHAN_MTU;
- dev->type = ARPHRD_X25; /* ARP h/w type */
- dev->hard_header_len = 0; /* media header length */
- dev->addr_len = 0; /* hardware address length */
-
- if (!chan->svc)
- *(u16*)dev->dev_addr = htons(chan->lcn);
-
- /* Initialize hardware parameters (just for reference) */
- dev->irq = wandev->irq;
- dev->dma = wandev->dma;
- dev->base_addr = wandev->ioport;
- dev->mem_start = (unsigned long)wandev->maddr;
- dev->mem_end = (unsigned long)(wandev->maddr + wandev->msize - 1);
- dev->flags |= IFF_NOARP;
-
- /* Set transmit buffer queue length */
- dev->tx_queue_len = 10;
-
- /* Initialize socket buffers */
- dev_init_buffers(dev);
- set_chan_state(dev, WAN_DISCONNECTED);
- return 0;
-}
-
-/* Open network interface.
- * o prevent module from unloading by incrementing use count
- * o if link is disconnected then initiate connection
- *
- * Return 0 if O.k. or errno. */
-static int if_open (struct net_device *dev)
-{
- x25_channel_t *chan = dev->priv;
- cycx_t *card = chan->card;
-
- if (dev->start)
- return -EBUSY; /* only one open is allowed */
-
- dev->interrupt = 0;
- dev->tbusy = 0;
- dev->start = 1;
- cyclomx_open(card);
-
- return 0;
-}
-
-/* Close network interface.
- * o reset flags.
- * o if there's no more open channels then disconnect physical link. */
-static int if_close (struct net_device *dev)
-{
- x25_channel_t *chan = dev->priv;
- cycx_t *card = chan->card;
-
- dev->start = 0;
-
- if (chan->state == WAN_CONNECTED || chan->state == WAN_CONNECTING)
- chan_disc(dev);
-
- cyclomx_close(card);
- return 0;
-}
-
-/* Build media header.
- * o encapsulate packet according to encapsulation type.
- *
- * The trick here is to put packet type (Ethertype) into 'protocol' field of
- * the socket buffer, so that we don't forget it. If encapsulation fails,
- * set skb->protocol to 0 and discard packet later.
- *
- * Return: media header length. */
-static int if_header (struct sk_buff *skb, struct net_device *dev,
- u16 type, void *daddr, void *saddr, unsigned len)
-{
- skb->protocol = type;
- return dev->hard_header_len;
-}
-
-/* * Re-build media header.
- * Return: 1 physical address resolved.
- * 0 physical address not resolved */
-static int if_rebuild_hdr (struct sk_buff *skb)
-{
- return 1;
-}
-
-/* Send a packet on a network interface.
- * o set tbusy flag (marks start of the transmission).
- * o check link state. If link is not up, then drop the packet.
- * o check channel status. If it's down then initiate a call.
- * o pass a packet to corresponding WAN device.
- * o free socket buffer
- *
- * Return: 0 complete (socket buffer must be freed)
- * non-0 packet may be re-transmitted (tbusy must be set)
- *
- * Notes:
- * 1. This routine is called either by the protocol stack or by the "net
- * bottom half" (with interrupts enabled).
- * 2. Setting tbusy flag will inhibit further transmit requests from the
- * protocol stack and can be used for flow control with protocol layer. */
-static int if_send (struct sk_buff *skb, struct net_device *dev)
-{
- x25_channel_t *chan = dev->priv;
- cycx_t *card = chan->card;
-
- if (dev->tbusy) {
- ++chan->ifstats.rx_dropped;
- return -EBUSY;
- }
-
- if (!chan->svc)
- chan->protocol = skb->protocol;
-
- if (card->wandev.state != WAN_CONNECTED)
- ++chan->ifstats.tx_dropped;
- else if (chan->svc && chan->protocol &&
- chan->protocol != skb->protocol) {
- printk(KERN_INFO
- "%s: unsupported Ethertype 0x%04X on interface %s!\n",
- card->devname, skb->protocol, dev->name);
- ++chan->ifstats.tx_errors;
- } else switch (chan->state) {
- case WAN_DISCONNECTED:
- if (chan_connect(dev)) {
- dev->tbusy = 1;
- return -EBUSY;
- }
- /* fall thru */
- case WAN_CONNECTED:
- reset_timer(dev);
- dev->trans_start = jiffies;
- dev->tbusy = 1;
-
- if (chan_send(dev, skb)) {
- return -EBUSY;
- }
- break;
- default:
- ++chan->ifstats.tx_dropped;
- ++card->wandev.stats.tx_dropped;
- }
-
- dev_kfree_skb(skb);
- return 0;
-}
-
-/* Get Ethernet-style interface statistics.
- * Return a pointer to struct net_device_stats */
-static struct net_device_stats *if_stats (struct net_device *dev)
-{
- x25_channel_t *chan = dev->priv;
-
- return chan ? &chan->ifstats : NULL;
-}
-
-/* Interrupt Handlers */
-/* X.25 Interrupt Service Routine. */
-static void cyx_isr (cycx_t *card)
-{
- TX25Cmd cmd;
- u16 z = 0;
-
- card->in_isr = 1;
- card->buff_int_mode_unbusy = 0;
- cycx_peek(&card->hw, X25_RXMBOX_OFFS, &cmd, sizeof(cmd));
-
- switch (cmd.command) {
- case X25_DATA_INDICATION:
- rx_intr(card, &cmd);
- break;
- case X25_ACK_FROM_VC:
- tx_intr(card, &cmd);
- break;
- case X25_LOG:
- log_intr(card, &cmd);
- break;
- case X25_STATISTIC:
- stat_intr(card, &cmd);
- break;
- case X25_CONNECT_CONFIRM:
- connect_confirm_intr(card, &cmd);
- break;
- case X25_CONNECT_INDICATION:
- connect_intr(card, &cmd);
- break;
- case X25_DISCONNECT_INDICATION:
- disconnect_intr(card, &cmd);
- break;
- case X25_DISCONNECT_CONFIRM:
- disconnect_confirm_intr(card, &cmd);
- break;
- case X25_LINE_ON:
- cyclomx_set_state(card, WAN_CONNECTED);
- break;
- case X25_LINE_OFF:
- cyclomx_set_state(card, WAN_DISCONNECTED);
- break;
- default:
- spur_intr(card, &cmd); /* unwanted interrupt */
- }
-
- cycx_poke(&card->hw, 0, &z, sizeof(z));
- cycx_poke(&card->hw, X25_RXMBOX_OFFS, &z, sizeof(z));
- card->in_isr = 0;
-
- if (card->buff_int_mode_unbusy)
- mark_bh(NET_BH);
-}
-
-/* Transmit interrupt handler.
- * o Release socket buffer
- * o Clear 'tbusy' flag */
-static void tx_intr (cycx_t *card, TX25Cmd *cmd)
-{
- struct net_device *dev;
- wan_device_t *wandev = &card->wandev;
- u8 lcn;
-
- cycx_peek(&card->hw, cmd->buf, &lcn, sizeof(lcn));
-
- /* unbusy device and then dev_tint(); */
- if ((dev = get_dev_by_lcn (wandev, lcn)) != NULL) {
- card->buff_int_mode_unbusy = 1;
- dev->tbusy = 0;
- } else
- printk(KERN_ERR "%s:ackvc for inexistent lcn %d\n",
- card->devname, lcn);
-}
-
-/* Receive interrupt handler.
- * This routine handles fragmented IP packets using M-bit according to the
- * RFC1356.
- * o map ligical channel number to network interface.
- * o allocate socket buffer or append received packet to the existing one.
- * o if M-bit is reset (i.e. it's the last packet in a sequence) then
- * decapsulate packet and pass socket buffer to the protocol stack.
- *
- * Notes:
- * 1. When allocating a socket buffer, if M-bit is set then more data is
- * comming and we have to allocate buffer for the maximum IP packet size
- * expected on this channel.
- * 2. If something goes wrong and X.25 packet has to be dropped (e.g. no
- * socket buffers available) the whole packet sequence must be discarded. */
-static void rx_intr (cycx_t *card, TX25Cmd *cmd)
-{
- wan_device_t *wandev = &card->wandev;
- struct net_device *dev;
- x25_channel_t *chan;
- struct sk_buff *skb;
- u8 bitm, lcn;
- int pktlen = cmd->len - 5;
-
- cycx_peek(&card->hw, cmd->buf, &lcn, sizeof(lcn));
- cycx_peek(&card->hw, cmd->buf + 4, &bitm, sizeof(bitm));
- bitm &= 0x10;
-
- if ((dev = get_dev_by_lcn(wandev, lcn)) == NULL) {
- /* Invalid channel, discard packet */
- printk(KERN_INFO "%s: receiving on orphaned LCN %d!\n",
- card->devname, lcn);
- return;
- }
-
- chan = dev->priv;
- reset_timer(dev);
-
- if (chan->drop_sequence) {
- if (!bitm)
- chan->drop_sequence = 0;
- else
- return;
- }
-
- if ((skb = chan->rx_skb) == NULL) {
- /* Allocate new socket buffer */
- int bufsize = bitm ? dev->mtu : pktlen;
-
- if ((skb = dev_alloc_skb(bufsize +
- dev->hard_header_len)) == NULL) {
- printk(KERN_INFO "%s: no socket buffers available!\n",
- card->devname);
- chan->drop_sequence = 1;
- ++chan->ifstats.rx_dropped;
- return;
- }
-
- skb->dev = dev;
- skb->protocol = htons(chan->protocol);
- chan->rx_skb = skb;
- }
-
- if (skb_tailroom(skb) < pktlen) {
- /* No room for the packet. Call off the whole thing! */
- dev_kfree_skb(skb);
- chan->rx_skb = NULL;
-
- if (bitm)
- chan->drop_sequence = 1;
-
- printk(KERN_INFO "%s: unexpectedly long packet sequence "
- "on interface %s!\n", card->devname, dev->name);
- ++chan->ifstats.rx_length_errors;
- return;
- }
-
- /* Append packet to the socket buffer */
- cycx_peek(&card->hw, cmd->buf + 5, skb_put(skb, pktlen), pktlen);
-
- if (bitm)
- return; /* more data is coming */
-
- dev->last_rx = jiffies; /* timestamp */
- chan->rx_skb = NULL; /* dequeue packet */
-
- skb->protocol = htons(ETH_P_IP);
- skb->dev = dev;
- skb->mac.raw = skb->data;
- netif_rx(skb);
- ++chan->ifstats.rx_packets;
- chan->ifstats.rx_bytes += skb->len;
-}
-
-/* Connect interrupt handler. */
-static void connect_intr (cycx_t *card, TX25Cmd *cmd)
-{
- wan_device_t *wandev = &card->wandev;
- struct net_device *dev = NULL;
- x25_channel_t *chan;
- u8 d[32],
- loc[24],
- rem[24];
- u8 lcn, sizeloc, sizerem;
-
- cycx_peek(&card->hw, cmd->buf, &lcn, sizeof(lcn));
- cycx_peek(&card->hw, cmd->buf + 5, &sizeloc, sizeof(sizeloc));
- cycx_peek(&card->hw, cmd->buf + 6, d, cmd->len - 6);
-
- sizerem = sizeloc >> 4;
- sizeloc &= 0x0F;
-
- loc[0] = rem[0] = '\0';
-
- if (sizeloc)
- nibble_to_byte(d, loc, sizeloc, 0);
-
- if (sizerem)
- nibble_to_byte(d + (sizeloc >> 1), rem, sizerem, sizeloc & 1);
-
- dprintk(KERN_INFO "connect_intr:lcn=%d, local=%s, remote=%s\n",
- lcn, loc, rem);
- if ((dev = get_dev_by_dte_addr(wandev, rem)) == NULL) {
- /* Invalid channel, discard packet */
- printk(KERN_INFO "%s: connect not expected: remote %s!\n",
- card->devname, rem);
- return;
- }
-
- chan = dev->priv;
- chan->lcn = lcn;
- x25_connect_response(card, chan);
- set_chan_state(dev, WAN_CONNECTED);
-}
-
-/* Connect confirm interrupt handler. */
-static void connect_confirm_intr (cycx_t *card, TX25Cmd *cmd)
-{
- wan_device_t *wandev = &card->wandev;
- struct net_device *dev;
- x25_channel_t *chan;
- u8 lcn, key;
-
- cycx_peek(&card->hw, cmd->buf, &lcn, sizeof(lcn));
- cycx_peek(&card->hw, cmd->buf + 1, &key, sizeof(key));
- dprintk(KERN_INFO "%s: connect_confirm_intr:lcn=%d, key=%d\n",
- card->devname, lcn, key);
- if ((dev = get_dev_by_lcn(wandev, -key)) == NULL) {
- /* Invalid channel, discard packet */
- clear_bit(--key, (void*)&card->u.x.connection_keys);
- printk(KERN_INFO "%s: connect confirm not expected: lcn %d, "
- "key=%d!\n", card->devname, lcn, key);
- return;
- }
-
- clear_bit(--key, (void*)&card->u.x.connection_keys);
- chan = dev->priv;
- chan->lcn = lcn;
- set_chan_state(dev, WAN_CONNECTED);
-}
-
-/* Disonnect confirm interrupt handler. */
-static void disconnect_confirm_intr (cycx_t *card, TX25Cmd *cmd)
-{
- wan_device_t *wandev = &card->wandev;
- struct net_device *dev;
- u8 lcn;
-
- cycx_peek(&card->hw, cmd->buf, &lcn, sizeof(lcn));
- dprintk(KERN_INFO "%s: disconnect_confirm_intr:lcn=%d\n",
- card->devname, lcn);
- if ((dev = get_dev_by_lcn(wandev, lcn)) == NULL) {
- /* Invalid channel, discard packet */
- printk(KERN_INFO "%s:disconnect confirm not expected!:lcn %d\n",
- card->devname, lcn);
- return;
- }
-
- set_chan_state(dev, WAN_DISCONNECTED);
-}
-
-/* disconnect interrupt handler. */
-static void disconnect_intr (cycx_t *card, TX25Cmd *cmd)
-{
- wan_device_t *wandev = &card->wandev;
- struct net_device *dev;
- u8 lcn;
-
- cycx_peek(&card->hw, cmd->buf, &lcn, sizeof(lcn));
- dprintk(KERN_INFO "disconnect_intr:lcn=%d\n", lcn);
-
- if ((dev = get_dev_by_lcn(wandev, lcn)) != NULL) {
- x25_channel_t *chan = dev->priv;
-
- x25_disconnect_response(card, chan->link, lcn);
- set_chan_state(dev, WAN_DISCONNECTED);
- } else
- x25_disconnect_response(card, 0, lcn);
-}
-
-/* LOG interrupt handler. */
-static void log_intr (cycx_t *card, TX25Cmd *cmd)
-{
-#if CYCLOMX_X25_DEBUG
- char bf[20];
- u16 size, toread, link, msg_code;
- u8 code, routine;
-
- cycx_peek(&card->hw, cmd->buf, &msg_code, sizeof(msg_code));
- cycx_peek(&card->hw, cmd->buf + 2, &link, sizeof(link));
- cycx_peek(&card->hw, cmd->buf + 4, &size, sizeof(size));
- /* at most 20 bytes are available... thanx to Daniela :) */
- toread = size < 20 ? size : 20;
- cycx_peek(&card->hw, cmd->buf + 10, &bf, toread);
- cycx_peek(&card->hw, cmd->buf + 10 + toread, &code, 1);
- cycx_peek(&card->hw, cmd->buf + 10 + toread + 1, &routine, 1);
-
- printk(KERN_INFO "cyx_isr: X25_LOG (0x4500) indic.:\n");
- printk(KERN_INFO "cmd->buf=0x%X\n", cmd->buf);
- printk(KERN_INFO "Log message code=0x%X\n", msg_code);
- printk(KERN_INFO "Link=%d\n", link);
- printk(KERN_INFO "log code=0x%X\n", code);
- printk(KERN_INFO "log routine=0x%X\n", routine);
- printk(KERN_INFO "Message size=%d\n", size);
- hex_dump("Message", bf, toread);
-#endif
-}
-
-/* STATISTIC interrupt handler. */
-static void stat_intr (cycx_t *card, TX25Cmd *cmd)
-{
- cycx_peek(&card->hw, cmd->buf, &card->u.x.stats,
- sizeof(card->u.x.stats));
- hex_dump("stat_intr", (unsigned char*)&card->u.x.stats,
- sizeof(card->u.x.stats));
- x25_dump_stats(&card->u.x.stats);
- wake_up_interruptible(&card->wait_stats);
-}
-
-/* Spurious interrupt handler.
- * o print a warning
- * If number of spurious interrupts exceeded some limit, then ??? */
-static void spur_intr (cycx_t *card, TX25Cmd *cmd)
-{
- printk(KERN_INFO "%s: spurious interrupt (0x%X)!\n",
- card->devname, cmd->command);
-}
-#ifdef CYCLOMX_X25_DEBUG
-static void hex_dump(char *msg, unsigned char *p, int len)
-{
- unsigned char hex[1024],
- * phex = hex;
-
- if (len >= (sizeof(hex) / 2))
- len = (sizeof(hex) / 2) - 1;
-
- while (len--) {
- sprintf(phex, "%02x", *p++);
- phex += 2;
- }
-
- printk(KERN_INFO "%s: %s\n", msg, hex);
-}
-#endif
-/* CYCLOM X Firmware-Specific Functions */
-/* Exec x25 command. */
-static int x25_exec (cycx_t *card, int command, int link,
- void *d1, int len1, void *d2, int len2)
-{
- TX25Cmd c;
- unsigned long flags;
- u32 addr = 0x1200 + 0x2E0 * link + 0x1E2;
- u8 retry = MAX_CMD_RETRY;
- int err = 0;
-
- c.command = command;
- c.link = link;
- c.len = len1 + len2;
-
- spin_lock_irqsave(&card->u.x.lock, flags);
-
- /* write command */
- cycx_poke(&card->hw, X25_MBOX_OFFS, &c, sizeof(c) - sizeof(c.buf));
-
- /* write x25 data */
- if (d1) {
- cycx_poke(&card->hw, addr, d1, len1);
-
- if (d2) {
- if (len2 > 254) {
- u32 addr1 = 0xA00 + 0x400 * link;
-
- cycx_poke(&card->hw, addr + len1, d2, 249);
- cycx_poke(&card->hw, addr1, ((u8*) d2) + 249,
- len2 - 249);
- } else
- cycx_poke(&card->hw, addr + len1, d2, len2);
- }
- }
-
- /* generate interruption, executing command */
- cycx_intr(&card->hw);
-
- /* wait till card->mbox == 0 */
- do {
- err = cycx_exec(card->mbox);
- } while (retry-- && err);
-
- spin_unlock_irqrestore(&card->u.x.lock, flags);
-
- return err;
-}
-
-/* Configure adapter. */
-static int x25_configure (cycx_t *card, TX25Config *conf)
-{
- struct {
- u16 nlinks;
- TX25Config conf[2];
- } x25_cmd_conf;
-
- memset (&x25_cmd_conf, 0, sizeof(x25_cmd_conf));
- x25_cmd_conf.nlinks = 2;
- x25_cmd_conf.conf[0] = *conf;
- /* FIXME: we need to find a way in the wanrouter framework
- to configure the second link, for now lets use it
- with the same config from the first link, fixing
- the interface type to RS232, the speed in 38400 and
- the clock to external */
- x25_cmd_conf.conf[1] = *conf;
- x25_cmd_conf.conf[1].link = 1;
- x25_cmd_conf.conf[1].speed = 5; /* 38400 */
- x25_cmd_conf.conf[1].clock = 8;
- x25_cmd_conf.conf[1].flags = 0; /* default = RS232 */
-
- x25_dump_config(&x25_cmd_conf.conf[0]);
- x25_dump_config(&x25_cmd_conf.conf[1]);
-
- return x25_exec(card, X25_CONFIG, 0,
- &x25_cmd_conf, sizeof(x25_cmd_conf), NULL, 0);
-}
-
-/* Get protocol statistics. */
-static int x25_get_stats (cycx_t *card)
-{
- /* the firmware expects 20 in the size field!!!
- thanx to Daniela */
- int err = x25_exec(card, X25_STATISTIC, 0, NULL, 20, NULL, 0);
-
- if (err)
- return err;
-
- interruptible_sleep_on(&card->wait_stats);
-
- if (signal_pending(current))
- return -EINTR;
-
- card->wandev.stats.rx_packets = card->u.x.stats.n2_rx_frames;
- card->wandev.stats.rx_over_errors = card->u.x.stats.rx_over_errors;
- card->wandev.stats.rx_crc_errors = card->u.x.stats.rx_crc_errors;
- card->wandev.stats.rx_length_errors = 0; /* not available from fw */
- card->wandev.stats.rx_frame_errors = 0; /* not available from fw */
- card->wandev.stats.rx_missed_errors = card->u.x.stats.rx_aborts;
- card->wandev.stats.rx_dropped = 0; /* not available from fw */
- card->wandev.stats.rx_errors = 0; /* not available from fw */
- card->wandev.stats.tx_packets = card->u.x.stats.n2_tx_frames;
- card->wandev.stats.tx_aborted_errors = card->u.x.stats.tx_aborts;
- card->wandev.stats.tx_dropped = 0; /* not available from fw */
- card->wandev.stats.collisions = 0; /* not available from fw */
- card->wandev.stats.tx_errors = 0; /* not available from fw */
-
- x25_dump_devs(&card->wandev);
- return 0;
-}
-
-/* return the number of nibbles */
-static int byte_to_nibble(u8 *s, u8 *d, char *nibble)
-{
- int i = 0;
-
- if (*nibble && *s) {
- d[i] |= *s++ - '0';
- *nibble = 0;
- ++i;
- }
-
- while (*s) {
- d[i] = (*s - '0') << 4;
- if (*(s + 1))
- d[i] |= *(s + 1) - '0';
- else {
- *nibble = 1;
- break;
- }
- ++i;
- s += 2;
- }
-
- return i;
-}
-
-static void nibble_to_byte(u8 *s, u8 *d, u8 len, u8 nibble)
-{
- if (nibble) {
- *d++ = '0' + (*s++ & 0x0F);
- --len;
- }
-
- while (len) {
- *d++ = '0' + (*s >> 4);
-
- if (--len) {
- *d++ = '0' + (*s & 0x0F);
- --len;
- } else break;
-
- ++s;
- }
-
- *d = '\0';
-}
-
-/* Place X.25 call. */
-static int x25_place_call (cycx_t *card, x25_channel_t *chan)
-{
- int err = 0,
- len;
- char d[64],
- nibble = 0,
- mylen = chan->local_addr ? strlen(chan->local_addr) : 0,
- remotelen = strlen(chan->addr);
- u8 key;
-
- if (card->u.x.connection_keys == ~0UL) {
- printk(KERN_INFO "%s: too many simultaneous connection "
- "requests!\n", card->devname);
- return -EAGAIN;
- }
-
- key = ffz(card->u.x.connection_keys);
- set_bit(key, (void*)&card->u.x.connection_keys);
- ++key;
- dprintk(KERN_INFO "%s:x25_place_call:key=%d\n", card->devname, key);
- memset(d, 0, sizeof(d));
- d[1] = key; /* user key */
- d[2] = 0x10;
- d[4] = 0x0B;
-
- len = byte_to_nibble(chan->addr, d + 6, &nibble);
-
- if (chan->local_addr)
- len += byte_to_nibble(chan->local_addr, d + 6 + len, &nibble);
-
- if (nibble)
- ++len;
-
- d[5] = mylen << 4 | remotelen;
- d[6 + len + 1] = 0xCC; /* TCP/IP over X.25, thanx to Daniela :) */
-
- if ((err = x25_exec(card, X25_CONNECT_REQUEST, chan->link,
- &d, 7 + len + 1, NULL, 0)) != 0)
- clear_bit(--key, (void*)&card->u.x.connection_keys);
- else {
- chan->lcn = -key;
- chan->protocol = ETH_P_IP;
- }
-
- return err;
-}
-
-/* Place X.25 CONNECT RESPONSE. */
-static int x25_connect_response (cycx_t *card, x25_channel_t *chan)
-{
- u8 d[8];
-
- memset(d, 0, sizeof(d));
- d[0] = d[3] = chan->lcn;
- d[2] = 0x10;
- d[4] = 0x0F;
- d[7] = 0xCC; /* TCP/IP over X.25, thanx Daniela */
-
- return x25_exec(card, X25_CONNECT_RESPONSE, chan->link, &d, 8, NULL, 0);
-}
-
-/* Place X.25 DISCONNECT RESPONSE. */
-static int x25_disconnect_response (cycx_t *card, u8 link, u8 lcn)
-{
- char d[5];
-
- memset(d, 0, sizeof(d));
- d[0] = d[3] = lcn;
- d[2] = 0x10;
- d[4] = 0x17;
- return x25_exec(card, X25_DISCONNECT_RESPONSE, link, &d, 5, NULL, 0);
-}
-
-/* Clear X.25 call. */
-static int x25_clear_call (cycx_t *card, u8 link, u8 lcn, u8 cause, u8 diagn)
-{
- u8 d[7];
-
- memset(d, 0, sizeof(d));
- d[0] = d[3] = lcn;
- d[2] = 0x10;
- d[4] = 0x13;
- d[5] = cause;
- d[6] = diagn;
-
- return x25_exec(card, X25_DISCONNECT_REQUEST, link, d, 7, NULL, 0);
-}
-
-/* Send X.25 data packet. */
-static int x25_send (cycx_t *card, u8 link, u8 lcn, u8 bitm, int len, void *buf)
-{
- u8 d[] = "?\xFF\x10??";
-
- d[0] = d[3] = lcn;
- d[4] = bitm;
-
- return x25_exec(card, X25_DATA_REQUEST, link, &d, 5, buf, len);
-}
-
-/* Miscellaneous */
-/* Find network device by its channel number. */
-static struct net_device *get_dev_by_lcn (wan_device_t *wandev, s16 lcn)
-{
- struct net_device *dev = wandev->dev;
-
- for (; dev; dev = dev->slave)
- if (((x25_channel_t*)dev->priv)->lcn == lcn)
- break;
- return dev;
-}
-
-/* Find network device by its remote dte address. */
-static struct net_device *get_dev_by_dte_addr (wan_device_t *wandev, char *dte)
-{
- struct net_device *dev = wandev->dev;
-
- for (; dev; dev = dev->slave)
- if (!strcmp (((x25_channel_t*)dev->priv)->addr, dte))
- break;
- return dev;
-}
-
-/* Initiate connection on the logical channel.
- * o for PVC we just get channel configuration
- * o for SVCs place an X.25 call
- *
- * Return: 0 connected
- * >0 connection in progress
- * <0 failure */
-static int chan_connect (struct net_device *dev)
-{
- x25_channel_t *chan = dev->priv;
- cycx_t *card = chan->card;
-
- if (chan->svc) {
- if (!chan->addr[0])
- return -EINVAL; /* no destination address */
- dprintk(KERN_INFO "%s: placing X.25 call to %s...\n",
- card->devname, chan->addr);
- if (x25_place_call(card, chan))
- return -EIO;
- set_chan_state(dev, WAN_CONNECTING);
- return 1;
- } else
- set_chan_state(dev, WAN_CONNECTED);
-
- return 0;
-}
-
-/* Disconnect logical channel.
- * o if SVC then clear X.25 call */
-static void chan_disc (struct net_device *dev)
-{
- x25_channel_t *chan = dev->priv;
-
- if (chan->svc) {
- x25_clear_call(chan->card, chan->link, chan->lcn, 0, 0);
- set_chan_state(dev, WAN_DISCONNECTING);
- } else
- set_chan_state(dev, WAN_DISCONNECTED);
-}
-
-/* Called by kernel timer */
-static void chan_timer (unsigned long d)
-{
- struct net_device *dev = (struct net_device*) d;
- x25_channel_t *chan = dev->priv;
-
- switch (chan->state) {
- case WAN_CONNECTED:
- chan_disc(dev);
- break;
- default:
- printk (KERN_ERR "%s: chan_timer for svc (%s) not "
- "connected!\n",
- chan->card->devname, dev->name);
- }
-}
-
-/* Set logical channel state. */
-static void set_chan_state (struct net_device *dev, u8 state)
-{
- x25_channel_t *chan = dev->priv;
- cycx_t *card = chan->card;
- u32 flags = 0;
-
- spin_lock_irqsave(&card->lock, flags);
-
- if (chan->state != state) {
- if (chan->svc && chan->state == WAN_CONNECTED)
- del_timer(&chan->timer);
-
- switch (state) {
- case WAN_CONNECTED:
- printk (KERN_INFO "%s: interface %s "
- "connected!\n",
- card->devname, dev->name);
- *(u16*)dev->dev_addr = htons(chan->lcn);
- dev->tbusy = 0;
- reset_timer(dev);
- break;
-
- case WAN_CONNECTING:
- printk (KERN_INFO "%s: interface %s "
- "connecting...\n",
- card->devname, dev->name);
- break;
-
- case WAN_DISCONNECTING:
- printk (KERN_INFO "%s: interface %s "
- "disconnecting...\n",
- card->devname, dev->name);
- break;
-
- case WAN_DISCONNECTED:
- printk (KERN_INFO "%s: interface %s "
- "disconnected!\n",
- card->devname, dev->name);
- if (chan->svc) {
- *(unsigned short*)dev->dev_addr = 0;
- chan->lcn = 0;
- }
- dev->tbusy = 0;
- break;
- }
-
- chan->state = state;
- }
-
- spin_unlock_irqrestore(&card->lock, flags);
-}
-
-/* Send packet on a logical channel.
- * When this function is called, tx_skb field of the channel data space
- * points to the transmit socket buffer. When transmission is complete,
- * release socket buffer and reset 'tbusy' flag.
- *
- * Return: 0 - transmission complete
- * 1 - busy
- *
- * Notes:
- * 1. If packet length is greater than MTU for this channel, we'll fragment
- * the packet into 'complete sequence' using M-bit.
- * 2. When transmission is complete, an event notification should be issued
- * to the router. */
-static int chan_send (struct net_device *dev, struct sk_buff *skb)
-{
- x25_channel_t *chan = dev->priv;
- cycx_t *card = chan->card;
- int bitm = 0; /* final packet */
- unsigned len = skb->len;
-
- if (skb->len > card->wandev.mtu) {
- len = card->wandev.mtu;
- bitm = 0x10; /* set M-bit (more data) */
- }
-
- if (x25_send(card, chan->link, chan->lcn, bitm, len, skb->data))
- return 1;
-
- if (bitm) {
- skb_pull(skb, len);
- return 1;
- }
-
- ++chan->ifstats.tx_packets;
- chan->ifstats.tx_bytes += len;
- return 0;
-}
-
-/* Convert line speed in bps to a number used by cyclom 2x code. */
-static u8 bps_to_speed_code (u32 bps)
-{
- u8 number = 0; /* defaults to the lowest (1200) speed ;> */
-
- if (bps >= 512000) number = 8;
- else if (bps >= 256000) number = 7;
- else if (bps >= 64000) number = 6;
- else if (bps >= 38400) number = 5;
- else if (bps >= 19200) number = 4;
- else if (bps >= 9600) number = 3;
- else if (bps >= 4800) number = 2;
- else if (bps >= 2400) number = 1;
-
- return number;
-}
-
-/* log base 2 */
-static u8 log2 (u32 n)
-{
- u8 log = 0;
-
- if (!n)
- return 0;
-
- while (n > 1) {
- n >>= 1;
- ++log;
- }
-
- return log;
-}
-
-/* Convert decimal string to unsigned integer.
- * If len != 0 then only 'len' characters of the string are converted. */
-static unsigned dec_to_uint (u8 *str, int len)
-{
- unsigned val = 0;
-
- if (!len)
- len = strlen(str);
-
- for (; len && is_digit(*str); ++str, --len)
- val = (val * 10) + (*str - (unsigned)'0');
-
- return val;
-}
-
-static void reset_timer(struct net_device *dev)
-{
- x25_channel_t *chan = dev->priv;
-
- if (!chan->svc)
- return;
-
- del_timer(&chan->timer);
- chan->timer.expires = jiffies + chan->idle_tmout * HZ;
- add_timer(&chan->timer);
-}
-#ifdef CYCLOMX_X25_DEBUG
-static void x25_dump_config(TX25Config *conf)
-{
- printk (KERN_INFO "x25 configuration\n");
- printk (KERN_INFO "-----------------\n");
- printk (KERN_INFO "link number=%d\n", conf->link);
- printk (KERN_INFO "line speed=%d\n", conf->speed);
- printk (KERN_INFO "clock=%sternal\n", conf->clock == 8 ? "Ex" : "In");
- printk (KERN_INFO "# level 2 retransm.=%d\n", conf->n2);
- printk (KERN_INFO "level 2 window=%d\n", conf->n2win);
- printk (KERN_INFO "level 3 window=%d\n", conf->n3win);
- printk (KERN_INFO "# logical channels=%d\n", conf->nvc);
- printk (KERN_INFO "level 3 pkt len=%d\n", conf->pktlen);
- printk (KERN_INFO "my address=%d\n", conf->locaddr);
- printk (KERN_INFO "remote address=%d\n", conf->remaddr);
- printk (KERN_INFO "t1=%d seconds\n", conf->t1);
- printk (KERN_INFO "t2=%d seconds\n", conf->t2);
- printk (KERN_INFO "t21=%d seconds\n", conf->t21);
- printk (KERN_INFO "# PVCs=%d\n", conf->npvc);
- printk (KERN_INFO "t23=%d seconds\n", conf->t23);
- printk (KERN_INFO "flags=0x%x\n", conf->flags);
-}
-
-static void x25_dump_stats(TX25Stats *stats)
-{
- printk (KERN_INFO "x25 statistics\n");
- printk (KERN_INFO "--------------\n");
- printk (KERN_INFO "rx_crc_errors=%d\n", stats->rx_crc_errors);
- printk (KERN_INFO "rx_over_errors=%d\n", stats->rx_over_errors);
- printk (KERN_INFO "n2_tx_frames=%d\n", stats->n2_tx_frames);
- printk (KERN_INFO "n2_rx_frames=%d\n", stats->n2_rx_frames);
- printk (KERN_INFO "tx_timeouts=%d\n", stats->tx_timeouts);
- printk (KERN_INFO "rx_timeouts=%d\n", stats->rx_timeouts);
- printk (KERN_INFO "n3_tx_packets=%d\n", stats->n3_tx_packets);
- printk (KERN_INFO "n3_rx_packets=%d\n", stats->n3_rx_packets);
- printk (KERN_INFO "tx_aborts=%d\n", stats->tx_aborts);
- printk (KERN_INFO "rx_aborts=%d\n", stats->rx_aborts);
-}
-
-static void x25_dump_devs(wan_device_t *wandev)
-{
- struct net_device *dev = wandev->dev;
-
- printk (KERN_INFO "x25 dev states\n");
- printk (KERN_INFO "name: addr: tbusy:\n");
- printk (KERN_INFO "----------------------------\n");
-
- for (; dev; dev = dev->slave) {
- x25_channel_t *chan = dev->priv;
-
- printk (KERN_INFO "%-5.5s %-15.15s %ld\n",
- chan->name, chan->addr, dev->tbusy);
- }
-}
-
-#endif /* CYCLOMX_X25_DEBUG */
-/* End */
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)