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path: root/drivers/net/wan/cycx_x25.c
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Diffstat (limited to 'drivers/net/wan/cycx_x25.c')
-rw-r--r--drivers/net/wan/cycx_x25.c1602
1 files changed, 0 insertions, 1602 deletions
diff --git a/drivers/net/wan/cycx_x25.c b/drivers/net/wan/cycx_x25.c
deleted file mode 100644
index 06f3f6309e4b..000000000000
--- a/drivers/net/wan/cycx_x25.c
+++ /dev/null
@@ -1,1602 +0,0 @@
-/*
-* cycx_x25.c Cyclom 2X WAN Link Driver. X.25 module.
-*
-* Author: Arnaldo Carvalho de Melo <acme@conectiva.com.br>
-*
-* Copyright: (c) 1998-2003 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] = "?\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
-* 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 pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#define CYCLOMX_X25_DEBUG 1
-
-#include <linux/ctype.h> /* isdigit() */
-#include <linux/errno.h> /* return codes */
-#include <linux/if_arp.h> /* ARPHRD_HWX25 */
-#include <linux/kernel.h> /* printk(), and other useful stuff */
-#include <linux/module.h>
-#include <linux/string.h> /* inline memset(), etc. */
-#include <linux/sched.h>
-#include <linux/slab.h> /* kmalloc(), kfree() */
-#include <linux/stddef.h> /* offsetof(), etc. */
-#include <linux/wanrouter.h> /* WAN router definitions */
-
-#include <asm/byteorder.h> /* htons(), etc. */
-
-#include <linux/cyclomx.h> /* Cyclom 2X common user API definitions */
-#include <linux/cycx_x25.h> /* X.25 firmware API definitions */
-
-#include <net/x25device.h>
-
-/* Defines & Macros */
-#define CYCX_X25_MAX_CMD_RETRY 5
-#define CYCX_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. */
-struct cycx_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 */
- struct cycx_device *card; /* -> owner */
- struct net_device_stats ifstats;/* interface statistics */
-};
-
-/* Function Prototypes */
-/* WAN link driver entry points. These are called by the WAN router module. */
-static int cycx_wan_update(struct wan_device *wandev),
- cycx_wan_new_if(struct wan_device *wandev, struct net_device *dev,
- wanif_conf_t *conf),
- cycx_wan_del_if(struct wan_device *wandev, struct net_device *dev);
-
-/* Network device interface */
-static int cycx_netdevice_init(struct net_device *dev);
-static int cycx_netdevice_open(struct net_device *dev);
-static int cycx_netdevice_stop(struct net_device *dev);
-static int cycx_netdevice_hard_header(struct sk_buff *skb,
- struct net_device *dev, u16 type,
- const void *daddr, const void *saddr,
- unsigned len);
-static int cycx_netdevice_rebuild_header(struct sk_buff *skb);
-static netdev_tx_t cycx_netdevice_hard_start_xmit(struct sk_buff *skb,
- struct net_device *dev);
-
-static struct net_device_stats *
- cycx_netdevice_get_stats(struct net_device *dev);
-
-/* Interrupt handlers */
-static void cycx_x25_irq_handler(struct cycx_device *card),
- cycx_x25_irq_tx(struct cycx_device *card, struct cycx_x25_cmd *cmd),
- cycx_x25_irq_rx(struct cycx_device *card, struct cycx_x25_cmd *cmd),
- cycx_x25_irq_log(struct cycx_device *card,
- struct cycx_x25_cmd *cmd),
- cycx_x25_irq_stat(struct cycx_device *card,
- struct cycx_x25_cmd *cmd),
- cycx_x25_irq_connect_confirm(struct cycx_device *card,
- struct cycx_x25_cmd *cmd),
- cycx_x25_irq_disconnect_confirm(struct cycx_device *card,
- struct cycx_x25_cmd *cmd),
- cycx_x25_irq_connect(struct cycx_device *card,
- struct cycx_x25_cmd *cmd),
- cycx_x25_irq_disconnect(struct cycx_device *card,
- struct cycx_x25_cmd *cmd),
- cycx_x25_irq_spurious(struct cycx_device *card,
- struct cycx_x25_cmd *cmd);
-
-/* X.25 firmware interface functions */
-static int cycx_x25_configure(struct cycx_device *card,
- struct cycx_x25_config *conf),
- cycx_x25_get_stats(struct cycx_device *card),
- cycx_x25_send(struct cycx_device *card, u8 link, u8 lcn, u8 bitm,
- int len, void *buf),
- cycx_x25_connect_response(struct cycx_device *card,
- struct cycx_x25_channel *chan),
- cycx_x25_disconnect_response(struct cycx_device *card, u8 link,
- u8 lcn);
-
-/* channel functions */
-static int cycx_x25_chan_connect(struct net_device *dev),
- cycx_x25_chan_send(struct net_device *dev, struct sk_buff *skb);
-
-static void cycx_x25_chan_disconnect(struct net_device *dev),
- cycx_x25_chan_send_event(struct net_device *dev, u8 event);
-
-/* Miscellaneous functions */
-static void cycx_x25_set_chan_state(struct net_device *dev, u8 state),
- cycx_x25_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 cycx_log2(u32 n);
-
-static unsigned dec_to_uint(u8 *str, int len);
-
-static struct net_device *cycx_x25_get_dev_by_lcn(struct wan_device *wandev,
- s16 lcn);
-static struct net_device *
- cycx_x25_get_dev_by_dte_addr(struct wan_device *wandev, char *dte);
-
-static void cycx_x25_chan_setup(struct net_device *dev);
-
-#ifdef CYCLOMX_X25_DEBUG
-static void hex_dump(char *msg, unsigned char *p, int len);
-static void cycx_x25_dump_config(struct cycx_x25_config *conf);
-static void cycx_x25_dump_stats(struct cycx_x25_stats *stats);
-static void cycx_x25_dump_devs(struct wan_device *wandev);
-#else
-#define hex_dump(msg, p, len)
-#define cycx_x25_dump_config(conf)
-#define cycx_x25_dump_stats(stats)
-#define cycx_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 cycx_x25_wan_init(struct cycx_device *card, wandev_conf_t *conf)
-{
- struct cycx_x25_config cfg;
-
- /* Verify configuration ID */
- if (conf->config_id != WANCONFIG_X25) {
- pr_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;
- spin_lock_init(&card->u.x.lock);
-
- /* 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 = cycx_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 (cycx_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 = cycx_x25_irq_handler;
- card->exec = NULL;
- card->wandev.update = cycx_wan_update;
- card->wandev.new_if = cycx_wan_new_if;
- card->wandev.del_if = cycx_wan_del_if;
- card->wandev.state = WAN_DISCONNECTED;
-
- return 0;
-}
-
-/* WAN Device Driver Entry Points */
-/* Update device status & statistics. */
-static int cycx_wan_update(struct wan_device *wandev)
-{
- /* sanity checks */
- if (!wandev || !wandev->private)
- return -EFAULT;
-
- if (wandev->state == WAN_UNCONFIGURED)
- return -ENODEV;
-
- cycx_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 cycx_wan_new_if(struct wan_device *wandev, struct net_device *dev,
- wanif_conf_t *conf)
-{
- struct cycx_device *card = wandev->private;
- struct cycx_x25_channel *chan;
- int err = 0;
-
- if (!conf->name[0] || strlen(conf->name) > WAN_IFNAME_SZ) {
- pr_info("%s: invalid interface name!\n", card->devname);
- return -EINVAL;
- }
-
- dev = alloc_netdev(sizeof(struct cycx_x25_channel), conf->name,
- cycx_x25_chan_setup);
- if (!dev)
- return -ENOMEM;
-
- chan = netdev_priv(dev);
- 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) {
- pr_err("%s: %s local addr too long!\n",
- wandev->name, chan->name);
- err = -EINVAL;
- goto error;
- } else {
- chan->local_addr = kmalloc(len + 1, GFP_KERNEL);
-
- if (!chan->local_addr) {
- err = -ENOMEM;
- goto error;
- }
- }
-
- 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 = cycx_x25_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 (isdigit(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 {
- pr_err("%s: PVC %u is out of range on interface %s!\n",
- wandev->name, lcn, chan->name);
- err = -EINVAL;
- goto error;
- }
- } else {
- pr_err("%s: invalid media address on interface %s!\n",
- wandev->name, chan->name);
- err = -EINVAL;
- goto error;
- }
-
- return 0;
-
-error:
- free_netdev(dev);
- return err;
-}
-
-/* Delete logical channel. */
-static int cycx_wan_del_if(struct wan_device *wandev, struct net_device *dev)
-{
- struct cycx_x25_channel *chan = netdev_priv(dev);
-
- if (chan->svc) {
- kfree(chan->local_addr);
- if (chan->state == WAN_CONNECTED)
- del_timer(&chan->timer);
- }
-
- return 0;
-}
-
-
-/* Network Device Interface */
-
-static const struct header_ops cycx_header_ops = {
- .create = cycx_netdevice_hard_header,
- .rebuild = cycx_netdevice_rebuild_header,
-};
-
-static const struct net_device_ops cycx_netdev_ops = {
- .ndo_init = cycx_netdevice_init,
- .ndo_open = cycx_netdevice_open,
- .ndo_stop = cycx_netdevice_stop,
- .ndo_start_xmit = cycx_netdevice_hard_start_xmit,
- .ndo_get_stats = cycx_netdevice_get_stats,
-};
-
-static void cycx_x25_chan_setup(struct net_device *dev)
-{
- /* Initialize device driver entry points */
- dev->netdev_ops = &cycx_netdev_ops;
- dev->header_ops = &cycx_header_ops;
-
- /* Initialize media-specific parameters */
- dev->mtu = CYCX_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 */
-}
-
-/* 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 cycx_netdevice_init(struct net_device *dev)
-{
- struct cycx_x25_channel *chan = netdev_priv(dev);
- struct cycx_device *card = chan->card;
- struct wan_device *wandev = &card->wandev;
-
- if (!chan->svc)
- *(__be16*)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 */
- cycx_x25_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 cycx_netdevice_open(struct net_device *dev)
-{
- if (netif_running(dev))
- return -EBUSY; /* only one open is allowed */
-
- netif_start_queue(dev);
- return 0;
-}
-
-/* Close network interface.
- * o reset flags.
- * o if there's no more open channels then disconnect physical link. */
-static int cycx_netdevice_stop(struct net_device *dev)
-{
- struct cycx_x25_channel *chan = netdev_priv(dev);
-
- netif_stop_queue(dev);
-
- if (chan->state == WAN_CONNECTED || chan->state == WAN_CONNECTING)
- cycx_x25_chan_disconnect(dev);
-
- 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 cycx_netdevice_hard_header(struct sk_buff *skb,
- struct net_device *dev, u16 type,
- const void *daddr, const void *saddr,
- unsigned len)
-{
- skb->protocol = htons(type);
-
- return dev->hard_header_len;
-}
-
-/* * Re-build media header.
- * Return: 1 physical address resolved.
- * 0 physical address not resolved */
-static int cycx_netdevice_rebuild_header(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 netdev_tx_t cycx_netdevice_hard_start_xmit(struct sk_buff *skb,
- struct net_device *dev)
-{
- struct cycx_x25_channel *chan = netdev_priv(dev);
- struct cycx_device *card = chan->card;
-
- if (!chan->svc)
- chan->protocol = ntohs(skb->protocol);
-
- if (card->wandev.state != WAN_CONNECTED)
- ++chan->ifstats.tx_dropped;
- else if (chan->svc && chan->protocol &&
- chan->protocol != ntohs(skb->protocol)) {
- pr_info("%s: unsupported Ethertype 0x%04X on interface %s!\n",
- card->devname, ntohs(skb->protocol), dev->name);
- ++chan->ifstats.tx_errors;
- } else if (chan->protocol == ETH_P_IP) {
- switch (chan->state) {
- case WAN_DISCONNECTED:
- if (cycx_x25_chan_connect(dev)) {
- netif_stop_queue(dev);
- return NETDEV_TX_BUSY;
- }
- /* fall thru */
- case WAN_CONNECTED:
- reset_timer(dev);
- dev->trans_start = jiffies;
- netif_stop_queue(dev);
-
- if (cycx_x25_chan_send(dev, skb))
- return NETDEV_TX_BUSY;
-
- break;
- default:
- ++chan->ifstats.tx_dropped;
- ++card->wandev.stats.tx_dropped;
- }
- } else { /* chan->protocol == ETH_P_X25 */
- switch (skb->data[0]) {
- case X25_IFACE_DATA:
- break;
- case X25_IFACE_CONNECT:
- cycx_x25_chan_connect(dev);
- goto free_packet;
- case X25_IFACE_DISCONNECT:
- cycx_x25_chan_disconnect(dev);
- goto free_packet;
- default:
- pr_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 (cycx_x25_chan_send(dev, skb)) {
- /* prepare for future retransmissions */
- skb_push(skb, 1);
- return NETDEV_TX_BUSY;
- }
- }
-
-free_packet:
- dev_kfree_skb(skb);
-
- return NETDEV_TX_OK;
-}
-
-/* Get Ethernet-style interface statistics.
- * Return a pointer to struct net_device_stats */
-static struct net_device_stats *cycx_netdevice_get_stats(struct net_device *dev)
-{
- struct cycx_x25_channel *chan = netdev_priv(dev);
-
- return chan ? &chan->ifstats : NULL;
-}
-
-/* Interrupt Handlers */
-/* X.25 Interrupt Service Routine. */
-static void cycx_x25_irq_handler(struct cycx_device *card)
-{
- struct cycx_x25_cmd 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:
- cycx_x25_irq_rx(card, &cmd);
- break;
- case X25_ACK_FROM_VC:
- cycx_x25_irq_tx(card, &cmd);
- break;
- case X25_LOG:
- cycx_x25_irq_log(card, &cmd);
- break;
- case X25_STATISTIC:
- cycx_x25_irq_stat(card, &cmd);
- break;
- case X25_CONNECT_CONFIRM:
- cycx_x25_irq_connect_confirm(card, &cmd);
- break;
- case X25_CONNECT_INDICATION:
- cycx_x25_irq_connect(card, &cmd);
- break;
- case X25_DISCONNECT_INDICATION:
- cycx_x25_irq_disconnect(card, &cmd);
- break;
- case X25_DISCONNECT_CONFIRM:
- cycx_x25_irq_disconnect_confirm(card, &cmd);
- break;
- case X25_LINE_ON:
- cycx_set_state(card, WAN_CONNECTED);
- break;
- case X25_LINE_OFF:
- cycx_set_state(card, WAN_DISCONNECTED);
- break;
- default:
- cycx_x25_irq_spurious(card, &cmd);
- break;
- }
-
- 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 cycx_x25_irq_tx(struct cycx_device *card, struct cycx_x25_cmd *cmd)
-{
- struct net_device *dev;
- struct wan_device *wandev = &card->wandev;
- u8 lcn;
-
- cycx_peek(&card->hw, cmd->buf, &lcn, sizeof(lcn));
-
- /* unbusy device and then dev_tint(); */
- dev = cycx_x25_get_dev_by_lcn(wandev, lcn);
- if (dev) {
- card->buff_int_mode_unbusy = 1;
- netif_wake_queue(dev);
- } else
- pr_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 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 cycx_x25_irq_rx(struct cycx_device *card, struct cycx_x25_cmd *cmd)
-{
- struct wan_device *wandev = &card->wandev;
- struct net_device *dev;
- struct cycx_x25_channel *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;
-
- dev = cycx_x25_get_dev_by_lcn(wandev, lcn);
- if (!dev) {
- /* Invalid channel, discard packet */
- pr_info("%s: receiving on orphaned LCN %d!\n",
- card->devname, lcn);
- return;
- }
-
- chan = netdev_priv(dev);
- 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) {
- pr_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;
-
- pr_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_reset_mac_header(skb);
- netif_rx(skb);
-}
-
-/* Connect interrupt handler. */
-static void cycx_x25_irq_connect(struct cycx_device *card,
- struct cycx_x25_cmd *cmd)
-{
- struct wan_device *wandev = &card->wandev;
- struct net_device *dev = NULL;
- struct cycx_x25_channel *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(1, KERN_INFO "%s:lcn=%d, local=%s, remote=%s\n",
- __func__, lcn, loc, rem);
-
- dev = cycx_x25_get_dev_by_dte_addr(wandev, rem);
- if (!dev) {
- /* Invalid channel, discard packet */
- pr_info("%s: connect not expected: remote %s!\n",
- card->devname, rem);
- return;
- }
-
- chan = netdev_priv(dev);
- chan->lcn = lcn;
- cycx_x25_connect_response(card, chan);
- cycx_x25_set_chan_state(dev, WAN_CONNECTED);
-}
-
-/* Connect confirm interrupt handler. */
-static void cycx_x25_irq_connect_confirm(struct cycx_device *card,
- struct cycx_x25_cmd *cmd)
-{
- struct wan_device *wandev = &card->wandev;
- struct net_device *dev;
- struct cycx_x25_channel *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: %s:lcn=%d, key=%d\n",
- card->devname, __func__, lcn, key);
-
- dev = cycx_x25_get_dev_by_lcn(wandev, -key);
- if (!dev) {
- /* Invalid channel, discard packet */
- clear_bit(--key, (void*)&card->u.x.connection_keys);
- pr_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 = netdev_priv(dev);
- chan->lcn = lcn;
- cycx_x25_set_chan_state(dev, WAN_CONNECTED);
-}
-
-/* Disconnect confirm interrupt handler. */
-static void cycx_x25_irq_disconnect_confirm(struct cycx_device *card,
- struct cycx_x25_cmd *cmd)
-{
- struct wan_device *wandev = &card->wandev;
- struct net_device *dev;
- u8 lcn;
-
- cycx_peek(&card->hw, cmd->buf, &lcn, sizeof(lcn));
- dprintk(1, KERN_INFO "%s: %s:lcn=%d\n",
- card->devname, __func__, lcn);
- dev = cycx_x25_get_dev_by_lcn(wandev, lcn);
- if (!dev) {
- /* Invalid channel, discard packet */
- pr_info("%s:disconnect confirm not expected!:lcn %d\n",
- card->devname, lcn);
- return;
- }
-
- cycx_x25_set_chan_state(dev, WAN_DISCONNECTED);
-}
-
-/* disconnect interrupt handler. */
-static void cycx_x25_irq_disconnect(struct cycx_device *card,
- struct cycx_x25_cmd *cmd)
-{
- struct wan_device *wandev = &card->wandev;
- struct net_device *dev;
- u8 lcn;
-
- cycx_peek(&card->hw, cmd->buf, &lcn, sizeof(lcn));
- dprintk(1, KERN_INFO "%s:lcn=%d\n", __func__, lcn);
-
- dev = cycx_x25_get_dev_by_lcn(wandev, lcn);
- if (dev) {
- struct cycx_x25_channel *chan = netdev_priv(dev);
-
- cycx_x25_disconnect_response(card, chan->link, lcn);
- cycx_x25_set_chan_state(dev, WAN_DISCONNECTED);
- } else
- cycx_x25_disconnect_response(card, 0, lcn);
-}
-
-/* LOG interrupt handler. */
-static void cycx_x25_irq_log(struct cycx_device *card, struct cycx_x25_cmd *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);
-
- pr_info("cycx_x25_irq_handler: X25_LOG (0x4500) indic.:\n");
- pr_info("cmd->buf=0x%X\n", cmd->buf);
- pr_info("Log message code=0x%X\n", msg_code);
- pr_info("Link=%d\n", link);
- pr_info("log code=0x%X\n", code);
- pr_info("log routine=0x%X\n", routine);
- pr_info("Message size=%d\n", size);
- hex_dump("Message", bf, toread);
-#endif
-}
-
-/* STATISTIC interrupt handler. */
-static void cycx_x25_irq_stat(struct cycx_device *card,
- struct cycx_x25_cmd *cmd)
-{
- cycx_peek(&card->hw, cmd->buf, &card->u.x.stats,
- sizeof(card->u.x.stats));
- hex_dump("cycx_x25_irq_stat", (unsigned char*)&card->u.x.stats,
- sizeof(card->u.x.stats));
- cycx_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 cycx_x25_irq_spurious(struct cycx_device *card,
- struct cycx_x25_cmd *cmd)
-{
- pr_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)
-{
- print_hex_dump(KERN_INFO, msg, DUMP_PREFIX_OFFSET, 16, 1,
- p, len, true);
-}
-#endif
-
-/* Cyclom 2X Firmware-Specific Functions */
-/* Exec X.25 command. */
-static int x25_exec(struct cycx_device *card, int command, int link,
- void *d1, int len1, void *d2, int len2)
-{
- struct cycx_x25_cmd c;
- unsigned long flags;
- u32 addr = 0x1200 + 0x2E0 * link + 0x1E2;
- u8 retry = CYCX_X25_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 cycx_x25_configure(struct cycx_device *card,
- struct cycx_x25_config *conf)
-{
- struct {
- u16 nlinks;
- struct cycx_x25_config 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 */
-
- cycx_x25_dump_config(&x25_cmd_conf.conf[0]);
- cycx_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 cycx_x25_get_stats(struct cycx_device *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 */
-
- cycx_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(struct cycx_device *card,
- struct cycx_x25_channel *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 == ~0U) {
- pr_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=%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, 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 cycx_x25_connect_response(struct cycx_device *card,
- struct cycx_x25_channel *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 cycx_x25_disconnect_response(struct cycx_device *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(struct cycx_device *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 cycx_x25_send(struct cycx_device *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 *cycx_x25_get_dev_by_lcn(struct wan_device *wandev,
- s16 lcn)
-{
- struct net_device *dev = wandev->dev;
- struct cycx_x25_channel *chan;
-
- while (dev) {
- chan = netdev_priv(dev);
-
- if (chan->lcn == lcn)
- break;
- dev = chan->slave;
- }
- return dev;
-}
-
-/* Find network device by its remote dte address. */
-static struct net_device *
- cycx_x25_get_dev_by_dte_addr(struct wan_device *wandev, char *dte)
-{
- struct net_device *dev = wandev->dev;
- struct cycx_x25_channel *chan;
-
- while (dev) {
- chan = netdev_priv(dev);
-
- 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 cycx_x25_chan_connect(struct net_device *dev)
-{
- struct cycx_x25_channel *chan = netdev_priv(dev);
- struct cycx_device *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;
-
- cycx_x25_set_chan_state(dev, WAN_CONNECTING);
- return 1;
- } else
- cycx_x25_set_chan_state(dev, WAN_CONNECTED);
-
- return 0;
-}
-
-/* Disconnect logical channel.
- * o if SVC then clear X.25 call */
-static void cycx_x25_chan_disconnect(struct net_device *dev)
-{
- struct cycx_x25_channel *chan = netdev_priv(dev);
-
- if (chan->svc) {
- x25_clear_call(chan->card, chan->link, chan->lcn, 0, 0);
- cycx_x25_set_chan_state(dev, WAN_DISCONNECTING);
- } else
- cycx_x25_set_chan_state(dev, WAN_DISCONNECTED);
-}
-
-/* Called by kernel timer */
-static void cycx_x25_chan_timer(unsigned long d)
-{
- struct net_device *dev = (struct net_device *)d;
- struct cycx_x25_channel *chan = netdev_priv(dev);
-
- if (chan->state == WAN_CONNECTED)
- cycx_x25_chan_disconnect(dev);
- else
- pr_err("%s: %s for svc (%s) not connected!\n",
- chan->card->devname, __func__, dev->name);
-}
-
-/* Set logical channel state. */
-static void cycx_x25_set_chan_state(struct net_device *dev, u8 state)
-{
- struct cycx_x25_channel *chan = netdev_priv(dev);
- struct cycx_device *card = chan->card;
- unsigned 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!";
- *(__be16*)dev->dev_addr = htons(chan->lcn);
- netif_wake_queue(dev);
- reset_timer(dev);
-
- if (chan->protocol == ETH_P_X25)
- cycx_x25_chan_send_event(dev,
- X25_IFACE_CONNECT);
-
- 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)
- cycx_x25_chan_send_event(dev,
- X25_IFACE_DISCONNECT);
-
- netif_wake_queue(dev);
- break;
- }
-
- pr_info("%s: interface %s %s\n",
- 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 cycx_x25_chan_send(struct net_device *dev, struct sk_buff *skb)
-{
- struct cycx_x25_channel *chan = netdev_priv(dev);
- struct cycx_device *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 (cycx_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 cycx_x25_chan_send_event(struct net_device *dev, u8 event)
-{
- struct sk_buff *skb;
- unsigned char *ptr;
-
- if ((skb = dev_alloc_skb(1)) == NULL) {
- pr_err("%s: out of memory\n", __func__);
- return;
- }
-
- ptr = skb_put(skb, 1);
- *ptr = event;
-
- skb->protocol = x25_type_trans(skb, dev);
- netif_rx(skb);
-}
-
-/* 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 cycx_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 && isdigit(*str); ++str, --len)
- val = (val * 10) + (*str - (unsigned) '0');
-
- return val;
-}
-
-static void reset_timer(struct net_device *dev)
-{
- struct cycx_x25_channel *chan = netdev_priv(dev);
-
- if (chan->svc)
- mod_timer(&chan->timer, jiffies+chan->idle_tmout*HZ);
-}
-#ifdef CYCLOMX_X25_DEBUG
-static void cycx_x25_dump_config(struct cycx_x25_config *conf)
-{
- pr_info("X.25 configuration\n");
- pr_info("-----------------\n");
- pr_info("link number=%d\n", conf->link);
- pr_info("line speed=%d\n", conf->speed);
- pr_info("clock=%sternal\n", conf->clock == 8 ? "Ex" : "In");
- pr_info("# level 2 retransm.=%d\n", conf->n2);
- pr_info("level 2 window=%d\n", conf->n2win);
- pr_info("level 3 window=%d\n", conf->n3win);
- pr_info("# logical channels=%d\n", conf->nvc);
- pr_info("level 3 pkt len=%d\n", conf->pktlen);
- pr_info("my address=%d\n", conf->locaddr);
- pr_info("remote address=%d\n", conf->remaddr);
- pr_info("t1=%d seconds\n", conf->t1);
- pr_info("t2=%d seconds\n", conf->t2);
- pr_info("t21=%d seconds\n", conf->t21);
- pr_info("# PVCs=%d\n", conf->npvc);
- pr_info("t23=%d seconds\n", conf->t23);
- pr_info("flags=0x%x\n", conf->flags);
-}
-
-static void cycx_x25_dump_stats(struct cycx_x25_stats *stats)
-{
- pr_info("X.25 statistics\n");
- pr_info("--------------\n");
- pr_info("rx_crc_errors=%d\n", stats->rx_crc_errors);
- pr_info("rx_over_errors=%d\n", stats->rx_over_errors);
- pr_info("n2_tx_frames=%d\n", stats->n2_tx_frames);
- pr_info("n2_rx_frames=%d\n", stats->n2_rx_frames);
- pr_info("tx_timeouts=%d\n", stats->tx_timeouts);
- pr_info("rx_timeouts=%d\n", stats->rx_timeouts);
- pr_info("n3_tx_packets=%d\n", stats->n3_tx_packets);
- pr_info("n3_rx_packets=%d\n", stats->n3_rx_packets);
- pr_info("tx_aborts=%d\n", stats->tx_aborts);
- pr_info("rx_aborts=%d\n", stats->rx_aborts);
-}
-
-static void cycx_x25_dump_devs(struct wan_device *wandev)
-{
- struct net_device *dev = wandev->dev;
-
- pr_info("X.25 dev states\n");
- pr_info("name: addr: txoff: protocol:\n");
- pr_info("---------------------------------------\n");
-
- while(dev) {
- struct cycx_x25_channel *chan = netdev_priv(dev);
-
- pr_info("%-5.5s %-15.15s %d ETH_P_%s\n",
- chan->name, chan->addr, netif_queue_stopped(dev),
- chan->protocol == ETH_P_IP ? "IP" : "X25");
- dev = chan->slave;
- }
-}
-
-#endif /* CYCLOMX_X25_DEBUG */
-/* End */