cycx_x25.c
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上传日期:2013-04-10
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- /*
- * cycx_x25.c Cyclom 2X WAN Link Driver. X.25 module.
- *
- * Author: Arnaldo Carvalho de Melo <acme@conectiva.com.br>
- *
- * Copyright: (c) 1998-2001 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.
- * ============================================================================
- * 2001/01/12 acme use dev_kfree_skb_irq on interrupt context
- * 2000/04/02 acme dprintk, cycx_debug
- * fixed the bug introduced in get_dev_by_lcn and
- * get_dev_by_dte_addr by the anonymous hacker
- * that converted this driver to softnet
- * 2000/01/08 acme cleanup
- * 1999/10/27 acme use ARPHRD_HWX25 so that the X.25 stack know
- * that we have a X.25 stack implemented in
- * firmware onboard
- * 1999/10/18 acme support for X.25 sockets in if_send,
- * beware: socket(AF_X25...) IS WORK IN PROGRESS,
- * TCP/IP over X.25 via wanrouter not affected,
- * working.
- * 1999/10/09 acme chan_disc renamed to chan_disconnect,
- * began adding support for X.25 sockets:
- * conf->protocol in new_if
- * 1999/10/05 acme fixed return E... to return -E...
- * 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 channels 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] = "?xFFx10";
- * 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
- * 1998/12/31 acme x25_configure
- * this code can be compiled as non module
- * 1998/12/27 acme code cleanup
- * IPX code wiped out! let's decrease code
- * complexity for now, remember: I'm learning! :)
- * bps_to_speed_code OK
- * 1998/12/26 acme Minimal debug code cleanup
- * 1998/08/08 acme 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/slab.h> /* kmalloc(), kfree() */
- #include <linux/wanrouter.h> /* WAN router definitions */
- #include <asm/byteorder.h> /* htons(), etc. */
- #include <linux/if_arp.h> /* ARPHRD_HWX25 */
- #include <linux/cyclomx.h> /* Cyclom 2X 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 extension 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 {
- /* This member must be first. */
- struct net_device *slave; /* WAN slave */
- 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 net_device_stats 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);
- /* channel functions */
- static int chan_connect (struct net_device *dev),
- chan_send (struct net_device *dev, struct sk_buff *skb);
- static void chan_disconnect (struct net_device *dev),
- chan_x25_send_event(struct net_device *dev, u8 event);
- /* Miscellaneous functions */
- static void set_chan_state (struct net_device *dev, u8 state),
- chan_timer (unsigned long d);
- static void nibble_to_byte (u8 *s, u8 *d, u8 len, u8 nibble),
- reset_timer (struct net_device *dev);
- 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);
- #else
- #define hex_dump(msg, p, len)
- #define x25_dump_config(conf)
- #define x25_dump_stats(stats)
- #define x25_dump_devs(wandev)
- #endif
- /* Public Functions */
- /* X.25 Protocol Initialization routine.
- *
- * This routine is called by the main Cyclom 2X module during setup. At this
- * point adapter is completely initialized and X.25 firmware is running.
- * 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 reasonable 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_t(unsigned int, conf->u.x25.hi_pvc, 4095);
- card->u.x.lo_pvc = min_t(unsigned int, conf->u.x25.lo_pvc, card->u.x.hi_pvc);
- }
- if (conf->u.x25.hi_svc) {
- card->u.x.hi_svc = min_t(unsigned int, conf->u.x25.hi_svc, 4095);
- card->u.x.lo_svc = min_t(unsigned int, 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_t(unsigned int, conf->u.x25.hdlc_window, 7);
- if (conf->u.x25.pkt_window)
- cfg.n3win = min_t(unsigned int, conf->u.x25.pkt_window, 7);
- if (conf->u.x25.t1)
- cfg.t1 = min_t(unsigned int, conf->u.x25.t1, 30);
- if (conf->u.x25.t2)
- cfg.t2 = min_t(unsigned int, conf->u.x25.t2, 30);
- if (conf->u.x25.t11_t21)
- cfg.t21 = min_t(unsigned int, conf->u.x25.t11_t21, 30);
- if (conf->u.x25.t13_t23)
- cfg.t23 = min_t(unsigned int, conf->u.x25.t13_t23, 30);
- if (conf->u.x25.n2)
- cfg.n2 = min_t(unsigned int, 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 registration.
- *
- * 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] || 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 = conf->protocol ? ETH_P_X25 : 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 */
- strcpy(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->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_HWX25; /* 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 */
- 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 (netif_running(dev))
- return -EBUSY; /* only one open is allowed */
- netif_start_queue(dev);
- cyclomx_mod_inc_use_count(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;
- netif_stop_queue(dev);
-
- if (chan->state == WAN_CONNECTED || chan->state == WAN_CONNECTING)
- chan_disconnect(dev);
-
- cyclomx_mod_dec_use_count(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 busy 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 (!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 if (chan->protocol == ETH_P_IP) {
- switch (chan->state) {
- case WAN_DISCONNECTED:
- if (chan_connect(dev)) {
- netif_stop_queue(dev);
- return -EBUSY;
- }
- /* fall thru */
- case WAN_CONNECTED:
- reset_timer(dev);
- dev->trans_start = jiffies;
- netif_stop_queue(dev);
- if (chan_send(dev, skb))
- return -EBUSY;
- break;
- default:
- ++chan->ifstats.tx_dropped;
- ++card->wandev.stats.tx_dropped;
- }
- } else { /* chan->protocol == ETH_P_X25 */
- switch (skb->data[0]) {
- case 0: break;
- case 1: /* Connect request */
- chan_connect(dev);
- goto free_packet;
- case 2: /* Disconnect request */
- chan_disconnect(dev);
- goto free_packet;
- default:
- printk(KERN_INFO
- "%s: unknown %d x25-iface request on %s!n",
- card->devname, skb->data[0], dev->name);
- ++chan->ifstats.tx_errors;
- goto free_packet;
- }
- skb_pull(skb, 1); /* Remove control byte */
- reset_timer(dev);
- dev->trans_start = jiffies;
- netif_stop_queue(dev);
-
- if (chan_send(dev, skb)) {
- /* prepare for future retransmissions */
- skb_push(skb, 1);
- return -EBUSY;
- }
- }
- free_packet:
- 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;
- }
- /* 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;
- netif_wake_queue(dev);
- } else
- printk(KERN_ERR "%s:ackvc for inexistent lcn %dn",
- card->devname, lcn);
- }
- /* Receive interrupt handler.
- * This routine handles fragmented IP packets using M-bit according to the
- * RFC1356.
- * o map logical 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
- * coming 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((chan->protocol == ETH_P_X25 ? 1 : 0) +
- 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;
- }
- if (chan->protocol == ETH_P_X25) /* X.25 socket layer control */
- /* 0 = data packet (dev_alloc_skb zeroed skb->data) */
- skb_put(skb, 1);
- 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_irq(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 */
- chan->rx_skb = NULL; /* dequeue packet */
- ++chan->ifstats.rx_packets;
- chan->ifstats.rx_bytes += pktlen;
- skb->mac.raw = skb->data;
- netif_rx(skb);
- dev->last_rx = jiffies; /* timestamp */
- }
- /* 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] = ' ';
- if (sizeloc)
- nibble_to_byte(d, loc, sizeloc, 0);
- if (sizerem)
- nibble_to_byte(d + (sizeloc >> 1), rem, sizerem, sizeloc & 1);
- dprintk(1, KERN_INFO "connect_intr:lcn=%d, local=%s, remote=%sn",
- 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(1, KERN_INFO "%s: connect_confirm_intr:lcn=%d, key=%dn",
- 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);
- }
- /* Disconnect 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(1, KERN_INFO "%s: disconnect_confirm_intr:lcn=%dn",
- 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 %dn",
- 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(1, KERN_INFO "disconnect_intr:lcn=%dn", 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... thanks 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%Xn", cmd->buf);
- printk(KERN_INFO "Log message code=0x%Xn", msg_code);
- printk(KERN_INFO "Link=%dn", link);
- printk(KERN_INFO "log code=0x%Xn", code);
- printk(KERN_INFO "log routine=0x%Xn", routine);
- printk(KERN_INFO "Message size=%dn", 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: %sn", msg, hex);
- }
- #endif
- /* Cyclom 2X Firmware-Specific Functions */
- /* Exec X.25 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 X.25 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!!!
- thanks 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 = ' ';
- }
- /* 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(1, KERN_INFO "%s:x25_place_call:key=%dn", 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, thanks 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;
- 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, thanks 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[] = "?xFFx10??";
- 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;
- x25_channel_t *chan;
- while (dev) {
- chan = (x25_channel_t*)dev->priv;
- if (chan->lcn == lcn)
- break;
- dev = chan->slave;
- }
- 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;
- x25_channel_t *chan;
- while (dev) {
- chan = (x25_channel_t*)dev->priv;
- if (!strcmp(chan->addr, dte))
- break;
- dev = chan->slave;
- }
- 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(1, 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_disconnect (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;
-
- if (chan->state == WAN_CONNECTED)
- chan_disconnect(dev);
- else
- 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;
- long flags;
- char *string_state = NULL;
- 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:
- string_state = "connected!";
- *(u16*)dev->dev_addr = htons(chan->lcn);
- netif_wake_queue(dev);
- reset_timer(dev);
- if (chan->protocol == ETH_P_X25)
- chan_x25_send_event(dev, 1);
- break;
- case WAN_CONNECTING:
- string_state = "connecting...";
- break;
- case WAN_DISCONNECTING:
- string_state = "disconnecting...";
- break;
- case WAN_DISCONNECTED:
- string_state = "disconnected!";
-
- if (chan->svc) {
- *(unsigned short*)dev->dev_addr = 0;
- chan->lcn = 0;
- }
- if (chan->protocol == ETH_P_X25)
- chan_x25_send_event(dev, 2);
- netif_wake_queue(dev);
- break;
- }
- printk (KERN_INFO "%s: interface %s %sn", card->devname,
- dev->name, string_state);
- 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;
- }
- /* Send event (connection, disconnection, etc) to X.25 socket layer */
- static void chan_x25_send_event(struct net_device *dev, u8 event)
- {
- struct sk_buff *skb;
- unsigned char *ptr;
- if ((skb = dev_alloc_skb(1)) == NULL) {
- printk(KERN_ERR "%s: out of memoryn", __FUNCTION__);
- return;
- }
- ptr = skb_put(skb, 1);
- *ptr = event;
- skb->dev = dev;
- skb->protocol = htons(ETH_P_X25);
- skb->mac.raw = skb->data;
- skb->pkt_type = PACKET_HOST;
- netif_rx(skb);
- dev->last_rx = jiffies; /* timestamp */
- }
- /* 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)
- mod_timer(&chan->timer, jiffies+chan->idle_tmout*HZ);
- }
- #ifdef CYCLOMX_X25_DEBUG
- static void x25_dump_config(TX25Config *conf)
- {
- printk(KERN_INFO "X.25 configurationn");
- printk(KERN_INFO "-----------------n");
- printk(KERN_INFO "link number=%dn", conf->link);
- printk(KERN_INFO "line speed=%dn", conf->speed);
- printk(KERN_INFO "clock=%sternaln", conf->clock == 8 ? "Ex" : "In");
- printk(KERN_INFO "# level 2 retransm.=%dn", conf->n2);
- printk(KERN_INFO "level 2 window=%dn", conf->n2win);
- printk(KERN_INFO "level 3 window=%dn", conf->n3win);
- printk(KERN_INFO "# logical channels=%dn", conf->nvc);
- printk(KERN_INFO "level 3 pkt len=%dn", conf->pktlen);
- printk(KERN_INFO "my address=%dn", conf->locaddr);
- printk(KERN_INFO "remote address=%dn", conf->remaddr);
- printk(KERN_INFO "t1=%d secondsn", conf->t1);
- printk(KERN_INFO "t2=%d secondsn", conf->t2);
- printk(KERN_INFO "t21=%d secondsn", conf->t21);
- printk(KERN_INFO "# PVCs=%dn", conf->npvc);
- printk(KERN_INFO "t23=%d secondsn", conf->t23);
- printk(KERN_INFO "flags=0x%xn", conf->flags);
- }
- static void x25_dump_stats(TX25Stats *stats)
- {
- printk(KERN_INFO "X.25 statisticsn");
- printk(KERN_INFO "--------------n");
- printk(KERN_INFO "rx_crc_errors=%dn", stats->rx_crc_errors);
- printk(KERN_INFO "rx_over_errors=%dn", stats->rx_over_errors);
- printk(KERN_INFO "n2_tx_frames=%dn", stats->n2_tx_frames);
- printk(KERN_INFO "n2_rx_frames=%dn", stats->n2_rx_frames);
- printk(KERN_INFO "tx_timeouts=%dn", stats->tx_timeouts);
- printk(KERN_INFO "rx_timeouts=%dn", stats->rx_timeouts);
- printk(KERN_INFO "n3_tx_packets=%dn", stats->n3_tx_packets);
- printk(KERN_INFO "n3_rx_packets=%dn", stats->n3_rx_packets);
- printk(KERN_INFO "tx_aborts=%dn", stats->tx_aborts);
- printk(KERN_INFO "rx_aborts=%dn", stats->rx_aborts);
- }
- static void x25_dump_devs(wan_device_t *wandev)
- {
- struct net_device *dev = wandev->dev;
- printk(KERN_INFO "X.25 dev statesn");
- printk(KERN_INFO "name: addr: txoff: protocol:n");
- printk(KERN_INFO "---------------------------------------n");
- while(dev) {
- x25_channel_t *chan = dev->priv;
- printk(KERN_INFO "%-5.5s %-15.15s %d ETH_P_%sn",
- chan->name, chan->addr, netif_queue_stopped(dev),
- chan->protocol == ETH_P_IP ? "IP" : "X25");
- dev = chan->slave;
- }
- }
- #endif /* CYCLOMX_X25_DEBUG */
- /* End */