Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * cycx_x25.c Cyclom 2X WAN Link Driver. X.25 module. |
| 3 | * |
| 4 | * Author: Arnaldo Carvalho de Melo <acme@conectiva.com.br> |
| 5 | * |
| 6 | * Copyright: (c) 1998-2003 Arnaldo Carvalho de Melo |
| 7 | * |
| 8 | * Based on sdla_x25.c by Gene Kozin <genek@compuserve.com> |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or |
| 11 | * modify it under the terms of the GNU General Public License |
| 12 | * as published by the Free Software Foundation; either version |
| 13 | * 2 of the License, or (at your option) any later version. |
| 14 | * ============================================================================ |
| 15 | * 2001/01/12 acme use dev_kfree_skb_irq on interrupt context |
| 16 | * 2000/04/02 acme dprintk, cycx_debug |
| 17 | * fixed the bug introduced in get_dev_by_lcn and |
| 18 | * get_dev_by_dte_addr by the anonymous hacker |
| 19 | * that converted this driver to softnet |
| 20 | * 2000/01/08 acme cleanup |
| 21 | * 1999/10/27 acme use ARPHRD_HWX25 so that the X.25 stack know |
| 22 | * that we have a X.25 stack implemented in |
| 23 | * firmware onboard |
| 24 | * 1999/10/18 acme support for X.25 sockets in if_send, |
| 25 | * beware: socket(AF_X25...) IS WORK IN PROGRESS, |
| 26 | * TCP/IP over X.25 via wanrouter not affected, |
| 27 | * working. |
| 28 | * 1999/10/09 acme chan_disc renamed to chan_disconnect, |
| 29 | * began adding support for X.25 sockets: |
| 30 | * conf->protocol in new_if |
| 31 | * 1999/10/05 acme fixed return E... to return -E... |
| 32 | * 1999/08/10 acme serialized access to the card thru a spinlock |
| 33 | * in x25_exec |
| 34 | * 1999/08/09 acme removed per channel spinlocks |
| 35 | * removed references to enable_tx_int |
| 36 | * 1999/05/28 acme fixed nibble_to_byte, ackvc now properly treated |
| 37 | * if_send simplified |
| 38 | * 1999/05/25 acme fixed t1, t2, t21 & t23 configuration |
| 39 | * use spinlocks instead of cli/sti in some points |
| 40 | * 1999/05/24 acme finished the x25_get_stat function |
| 41 | * 1999/05/23 acme dev->type = ARPHRD_X25 (tcpdump only works, |
| 42 | * AFAIT, with ARPHRD_ETHER). This seems to be |
| 43 | * needed to use socket(AF_X25)... |
| 44 | * Now the config file must specify a peer media |
| 45 | * address for svc channels over a crossover cable. |
| 46 | * Removed hold_timeout from x25_channel_t, |
| 47 | * not used. |
| 48 | * A little enhancement in the DEBUG processing |
| 49 | * 1999/05/22 acme go to DISCONNECTED in disconnect_confirm_intr, |
| 50 | * instead of chan_disc. |
| 51 | * 1999/05/16 marcelo fixed timer initialization in SVCs |
| 52 | * 1999/01/05 acme x25_configure now get (most of) all |
| 53 | * parameters... |
| 54 | * 1999/01/05 acme pktlen now (correctly) uses log2 (value |
| 55 | * configured) |
| 56 | * 1999/01/03 acme judicious use of data types (u8, u16, u32, etc) |
| 57 | * 1999/01/03 acme cyx_isr: reset dpmbase to acknowledge |
| 58 | * indication (interrupt from cyclom 2x) |
| 59 | * 1999/01/02 acme cyx_isr: first hackings... |
| 60 | * 1999/01/0203 acme when initializing an array don't give less |
| 61 | * elements than declared... |
| 62 | * example: char send_cmd[6] = "?\xFF\x10"; |
| 63 | * you'll gonna lose a couple hours, 'cause your |
| 64 | * brain won't admit that there's an error in the |
| 65 | * above declaration... the side effect is that |
| 66 | * memset is put into the unresolved symbols |
| 67 | * instead of using the inline memset functions... |
| 68 | * 1999/01/02 acme began chan_connect, chan_send, x25_send |
| 69 | * 1998/12/31 acme x25_configure |
| 70 | * this code can be compiled as non module |
| 71 | * 1998/12/27 acme code cleanup |
| 72 | * IPX code wiped out! let's decrease code |
| 73 | * complexity for now, remember: I'm learning! :) |
| 74 | * bps_to_speed_code OK |
| 75 | * 1998/12/26 acme Minimal debug code cleanup |
| 76 | * 1998/08/08 acme Initial version. |
| 77 | */ |
| 78 | |
| 79 | #define CYCLOMX_X25_DEBUG 1 |
| 80 | |
Tobias Klauser | 8e18d1f | 2005-09-10 14:45:00 -0700 | [diff] [blame] | 81 | #include <linux/ctype.h> /* isdigit() */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | #include <linux/errno.h> /* return codes */ |
| 83 | #include <linux/if_arp.h> /* ARPHRD_HWX25 */ |
| 84 | #include <linux/kernel.h> /* printk(), and other useful stuff */ |
| 85 | #include <linux/module.h> |
| 86 | #include <linux/string.h> /* inline memset(), etc. */ |
| 87 | #include <linux/slab.h> /* kmalloc(), kfree() */ |
| 88 | #include <linux/stddef.h> /* offsetof(), etc. */ |
| 89 | #include <linux/wanrouter.h> /* WAN router definitions */ |
| 90 | |
| 91 | #include <asm/byteorder.h> /* htons(), etc. */ |
| 92 | |
| 93 | #include <linux/cyclomx.h> /* Cyclom 2X common user API definitions */ |
| 94 | #include <linux/cycx_x25.h> /* X.25 firmware API definitions */ |
| 95 | |
| 96 | #include <net/x25device.h> |
| 97 | |
| 98 | /* Defines & Macros */ |
| 99 | #define CYCX_X25_MAX_CMD_RETRY 5 |
| 100 | #define CYCX_X25_CHAN_MTU 2048 /* unfragmented logical channel MTU */ |
| 101 | |
| 102 | /* Data Structures */ |
| 103 | /* This is an extension of the 'struct net_device' we create for each network |
| 104 | interface to keep the rest of X.25 channel-specific data. */ |
| 105 | struct cycx_x25_channel { |
| 106 | /* This member must be first. */ |
| 107 | struct net_device *slave; /* WAN slave */ |
| 108 | |
| 109 | char name[WAN_IFNAME_SZ+1]; /* interface name, ASCIIZ */ |
| 110 | char addr[WAN_ADDRESS_SZ+1]; /* media address, ASCIIZ */ |
| 111 | char *local_addr; /* local media address, ASCIIZ - |
| 112 | svc thru crossover cable */ |
| 113 | s16 lcn; /* logical channel number/conn.req.key*/ |
| 114 | u8 link; |
| 115 | struct timer_list timer; /* timer used for svc channel disc. */ |
| 116 | u16 protocol; /* ethertype, 0 - multiplexed */ |
| 117 | u8 svc; /* 0 - permanent, 1 - switched */ |
| 118 | u8 state; /* channel state */ |
| 119 | u8 drop_sequence; /* mark sequence for dropping */ |
| 120 | u32 idle_tmout; /* sec, before disconnecting */ |
| 121 | struct sk_buff *rx_skb; /* receive socket buffer */ |
| 122 | struct cycx_device *card; /* -> owner */ |
| 123 | struct net_device_stats ifstats;/* interface statistics */ |
| 124 | }; |
| 125 | |
| 126 | /* Function Prototypes */ |
| 127 | /* WAN link driver entry points. These are called by the WAN router module. */ |
| 128 | static int cycx_wan_update(struct wan_device *wandev), |
| 129 | cycx_wan_new_if(struct wan_device *wandev, struct net_device *dev, |
| 130 | wanif_conf_t *conf), |
| 131 | cycx_wan_del_if(struct wan_device *wandev, struct net_device *dev); |
| 132 | |
| 133 | /* Network device interface */ |
Stephen Hemminger | 3b04ddd | 2007-10-09 01:40:57 -0700 | [diff] [blame] | 134 | static int cycx_netdevice_init(struct net_device *dev); |
| 135 | static int cycx_netdevice_open(struct net_device *dev); |
| 136 | static int cycx_netdevice_stop(struct net_device *dev); |
| 137 | static int cycx_netdevice_hard_header(struct sk_buff *skb, |
| 138 | struct net_device *dev, u16 type, |
| 139 | const void *daddr, const void *saddr, |
| 140 | unsigned len); |
| 141 | static int cycx_netdevice_rebuild_header(struct sk_buff *skb); |
| 142 | static int cycx_netdevice_hard_start_xmit(struct sk_buff *skb, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | struct net_device *dev); |
| 144 | |
| 145 | static struct net_device_stats * |
| 146 | cycx_netdevice_get_stats(struct net_device *dev); |
| 147 | |
| 148 | /* Interrupt handlers */ |
| 149 | static void cycx_x25_irq_handler(struct cycx_device *card), |
| 150 | cycx_x25_irq_tx(struct cycx_device *card, struct cycx_x25_cmd *cmd), |
| 151 | cycx_x25_irq_rx(struct cycx_device *card, struct cycx_x25_cmd *cmd), |
| 152 | cycx_x25_irq_log(struct cycx_device *card, |
| 153 | struct cycx_x25_cmd *cmd), |
| 154 | cycx_x25_irq_stat(struct cycx_device *card, |
| 155 | struct cycx_x25_cmd *cmd), |
| 156 | cycx_x25_irq_connect_confirm(struct cycx_device *card, |
| 157 | struct cycx_x25_cmd *cmd), |
| 158 | cycx_x25_irq_disconnect_confirm(struct cycx_device *card, |
| 159 | struct cycx_x25_cmd *cmd), |
| 160 | cycx_x25_irq_connect(struct cycx_device *card, |
| 161 | struct cycx_x25_cmd *cmd), |
| 162 | cycx_x25_irq_disconnect(struct cycx_device *card, |
| 163 | struct cycx_x25_cmd *cmd), |
| 164 | cycx_x25_irq_spurious(struct cycx_device *card, |
| 165 | struct cycx_x25_cmd *cmd); |
| 166 | |
| 167 | /* X.25 firmware interface functions */ |
| 168 | static int cycx_x25_configure(struct cycx_device *card, |
| 169 | struct cycx_x25_config *conf), |
| 170 | cycx_x25_get_stats(struct cycx_device *card), |
| 171 | cycx_x25_send(struct cycx_device *card, u8 link, u8 lcn, u8 bitm, |
| 172 | int len, void *buf), |
| 173 | cycx_x25_connect_response(struct cycx_device *card, |
| 174 | struct cycx_x25_channel *chan), |
| 175 | cycx_x25_disconnect_response(struct cycx_device *card, u8 link, |
| 176 | u8 lcn); |
| 177 | |
| 178 | /* channel functions */ |
| 179 | static int cycx_x25_chan_connect(struct net_device *dev), |
| 180 | cycx_x25_chan_send(struct net_device *dev, struct sk_buff *skb); |
| 181 | |
| 182 | static void cycx_x25_chan_disconnect(struct net_device *dev), |
| 183 | cycx_x25_chan_send_event(struct net_device *dev, u8 event); |
| 184 | |
| 185 | /* Miscellaneous functions */ |
| 186 | static void cycx_x25_set_chan_state(struct net_device *dev, u8 state), |
| 187 | cycx_x25_chan_timer(unsigned long d); |
| 188 | |
| 189 | static void nibble_to_byte(u8 *s, u8 *d, u8 len, u8 nibble), |
| 190 | reset_timer(struct net_device *dev); |
| 191 | |
| 192 | static u8 bps_to_speed_code(u32 bps); |
| 193 | static u8 cycx_log2(u32 n); |
| 194 | |
| 195 | static unsigned dec_to_uint(u8 *str, int len); |
| 196 | |
| 197 | static struct net_device *cycx_x25_get_dev_by_lcn(struct wan_device *wandev, |
| 198 | s16 lcn); |
| 199 | static struct net_device * |
| 200 | cycx_x25_get_dev_by_dte_addr(struct wan_device *wandev, char *dte); |
| 201 | |
| 202 | #ifdef CYCLOMX_X25_DEBUG |
| 203 | static void hex_dump(char *msg, unsigned char *p, int len); |
| 204 | static void cycx_x25_dump_config(struct cycx_x25_config *conf); |
| 205 | static void cycx_x25_dump_stats(struct cycx_x25_stats *stats); |
| 206 | static void cycx_x25_dump_devs(struct wan_device *wandev); |
| 207 | #else |
| 208 | #define hex_dump(msg, p, len) |
| 209 | #define cycx_x25_dump_config(conf) |
| 210 | #define cycx_x25_dump_stats(stats) |
| 211 | #define cycx_x25_dump_devs(wandev) |
| 212 | #endif |
| 213 | /* Public Functions */ |
| 214 | |
| 215 | /* X.25 Protocol Initialization routine. |
| 216 | * |
| 217 | * This routine is called by the main Cyclom 2X module during setup. At this |
| 218 | * point adapter is completely initialized and X.25 firmware is running. |
| 219 | * o configure adapter |
| 220 | * o initialize protocol-specific fields of the adapter data space. |
| 221 | * |
| 222 | * Return: 0 o.k. |
| 223 | * < 0 failure. */ |
| 224 | int cycx_x25_wan_init(struct cycx_device *card, wandev_conf_t *conf) |
| 225 | { |
| 226 | struct cycx_x25_config cfg; |
| 227 | |
| 228 | /* Verify configuration ID */ |
| 229 | if (conf->config_id != WANCONFIG_X25) { |
| 230 | printk(KERN_INFO "%s: invalid configuration ID %u!\n", |
| 231 | card->devname, conf->config_id); |
| 232 | return -EINVAL; |
| 233 | } |
| 234 | |
| 235 | /* Initialize protocol-specific fields */ |
| 236 | card->mbox = card->hw.dpmbase + X25_MBOX_OFFS; |
| 237 | card->u.x.connection_keys = 0; |
| 238 | spin_lock_init(&card->u.x.lock); |
| 239 | |
| 240 | /* Configure adapter. Here we set reasonable defaults, then parse |
| 241 | * device configuration structure and set configuration options. |
| 242 | * Most configuration options are verified and corrected (if |
| 243 | * necessary) since we can't rely on the adapter to do so and don't |
| 244 | * want it to fail either. */ |
| 245 | memset(&cfg, 0, sizeof(cfg)); |
| 246 | cfg.link = 0; |
| 247 | cfg.clock = conf->clocking == WANOPT_EXTERNAL ? 8 : 55; |
| 248 | cfg.speed = bps_to_speed_code(conf->bps); |
| 249 | cfg.n3win = 7; |
| 250 | cfg.n2win = 2; |
| 251 | cfg.n2 = 5; |
| 252 | cfg.nvc = 1; |
| 253 | cfg.npvc = 1; |
| 254 | cfg.flags = 0x02; /* default = V35 */ |
| 255 | cfg.t1 = 10; /* line carrier timeout */ |
| 256 | cfg.t2 = 29; /* tx timeout */ |
| 257 | cfg.t21 = 180; /* CALL timeout */ |
| 258 | cfg.t23 = 180; /* CLEAR timeout */ |
| 259 | |
| 260 | /* adjust MTU */ |
| 261 | if (!conf->mtu || conf->mtu >= 512) |
| 262 | card->wandev.mtu = 512; |
| 263 | else if (conf->mtu >= 256) |
| 264 | card->wandev.mtu = 256; |
| 265 | else if (conf->mtu >= 128) |
| 266 | card->wandev.mtu = 128; |
| 267 | else |
| 268 | card->wandev.mtu = 64; |
| 269 | |
| 270 | cfg.pktlen = cycx_log2(card->wandev.mtu); |
| 271 | |
| 272 | if (conf->station == WANOPT_DTE) { |
| 273 | cfg.locaddr = 3; /* DTE */ |
| 274 | cfg.remaddr = 1; /* DCE */ |
| 275 | } else { |
| 276 | cfg.locaddr = 1; /* DCE */ |
| 277 | cfg.remaddr = 3; /* DTE */ |
| 278 | } |
| 279 | |
| 280 | if (conf->interface == WANOPT_RS232) |
| 281 | cfg.flags = 0; /* FIXME just reset the 2nd bit */ |
| 282 | |
| 283 | if (conf->u.x25.hi_pvc) { |
| 284 | card->u.x.hi_pvc = min_t(unsigned int, conf->u.x25.hi_pvc, 4095); |
| 285 | card->u.x.lo_pvc = min_t(unsigned int, conf->u.x25.lo_pvc, card->u.x.hi_pvc); |
| 286 | } |
| 287 | |
| 288 | if (conf->u.x25.hi_svc) { |
| 289 | card->u.x.hi_svc = min_t(unsigned int, conf->u.x25.hi_svc, 4095); |
| 290 | card->u.x.lo_svc = min_t(unsigned int, conf->u.x25.lo_svc, card->u.x.hi_svc); |
| 291 | } |
| 292 | |
| 293 | if (card->u.x.lo_pvc == 255) |
| 294 | cfg.npvc = 0; |
| 295 | else |
| 296 | cfg.npvc = card->u.x.hi_pvc - card->u.x.lo_pvc + 1; |
| 297 | |
| 298 | cfg.nvc = card->u.x.hi_svc - card->u.x.lo_svc + 1 + cfg.npvc; |
| 299 | |
| 300 | if (conf->u.x25.hdlc_window) |
| 301 | cfg.n2win = min_t(unsigned int, conf->u.x25.hdlc_window, 7); |
| 302 | |
| 303 | if (conf->u.x25.pkt_window) |
| 304 | cfg.n3win = min_t(unsigned int, conf->u.x25.pkt_window, 7); |
| 305 | |
| 306 | if (conf->u.x25.t1) |
| 307 | cfg.t1 = min_t(unsigned int, conf->u.x25.t1, 30); |
| 308 | |
| 309 | if (conf->u.x25.t2) |
| 310 | cfg.t2 = min_t(unsigned int, conf->u.x25.t2, 30); |
| 311 | |
| 312 | if (conf->u.x25.t11_t21) |
| 313 | cfg.t21 = min_t(unsigned int, conf->u.x25.t11_t21, 30); |
| 314 | |
| 315 | if (conf->u.x25.t13_t23) |
| 316 | cfg.t23 = min_t(unsigned int, conf->u.x25.t13_t23, 30); |
| 317 | |
| 318 | if (conf->u.x25.n2) |
| 319 | cfg.n2 = min_t(unsigned int, conf->u.x25.n2, 30); |
| 320 | |
| 321 | /* initialize adapter */ |
| 322 | if (cycx_x25_configure(card, &cfg)) |
| 323 | return -EIO; |
| 324 | |
| 325 | /* Initialize protocol-specific fields of adapter data space */ |
| 326 | card->wandev.bps = conf->bps; |
| 327 | card->wandev.interface = conf->interface; |
| 328 | card->wandev.clocking = conf->clocking; |
| 329 | card->wandev.station = conf->station; |
| 330 | card->isr = cycx_x25_irq_handler; |
| 331 | card->exec = NULL; |
| 332 | card->wandev.update = cycx_wan_update; |
| 333 | card->wandev.new_if = cycx_wan_new_if; |
| 334 | card->wandev.del_if = cycx_wan_del_if; |
| 335 | card->wandev.state = WAN_DISCONNECTED; |
| 336 | |
| 337 | return 0; |
| 338 | } |
| 339 | |
| 340 | /* WAN Device Driver Entry Points */ |
| 341 | /* Update device status & statistics. */ |
| 342 | static int cycx_wan_update(struct wan_device *wandev) |
| 343 | { |
| 344 | /* sanity checks */ |
| 345 | if (!wandev || !wandev->private) |
| 346 | return -EFAULT; |
| 347 | |
| 348 | if (wandev->state == WAN_UNCONFIGURED) |
| 349 | return -ENODEV; |
| 350 | |
| 351 | cycx_x25_get_stats(wandev->private); |
| 352 | |
| 353 | return 0; |
| 354 | } |
| 355 | |
| 356 | /* Create new logical channel. |
| 357 | * This routine is called by the router when ROUTER_IFNEW IOCTL is being |
| 358 | * handled. |
| 359 | * o parse media- and hardware-specific configuration |
| 360 | * o make sure that a new channel can be created |
| 361 | * o allocate resources, if necessary |
| 362 | * o prepare network device structure for registration. |
| 363 | * |
| 364 | * Return: 0 o.k. |
| 365 | * < 0 failure (channel will not be created) */ |
| 366 | static int cycx_wan_new_if(struct wan_device *wandev, struct net_device *dev, |
| 367 | wanif_conf_t *conf) |
| 368 | { |
| 369 | struct cycx_device *card = wandev->private; |
| 370 | struct cycx_x25_channel *chan; |
| 371 | int err = 0; |
| 372 | |
| 373 | if (!conf->name[0] || strlen(conf->name) > WAN_IFNAME_SZ) { |
| 374 | printk(KERN_INFO "%s: invalid interface name!\n", |
| 375 | card->devname); |
| 376 | return -EINVAL; |
| 377 | } |
| 378 | |
| 379 | /* allocate and initialize private data */ |
Yoann Padioleau | dd00cc4 | 2007-07-19 01:49:03 -0700 | [diff] [blame] | 380 | chan = kzalloc(sizeof(struct cycx_x25_channel), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | if (!chan) |
| 382 | return -ENOMEM; |
| 383 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | strcpy(chan->name, conf->name); |
| 385 | chan->card = card; |
| 386 | chan->link = conf->port; |
| 387 | chan->protocol = conf->protocol ? ETH_P_X25 : ETH_P_IP; |
| 388 | chan->rx_skb = NULL; |
| 389 | /* only used in svc connected thru crossover cable */ |
| 390 | chan->local_addr = NULL; |
| 391 | |
| 392 | if (conf->addr[0] == '@') { /* SVC */ |
| 393 | int len = strlen(conf->local_addr); |
| 394 | |
| 395 | if (len) { |
| 396 | if (len > WAN_ADDRESS_SZ) { |
| 397 | printk(KERN_ERR "%s: %s local addr too long!\n", |
| 398 | wandev->name, chan->name); |
| 399 | kfree(chan); |
| 400 | return -EINVAL; |
| 401 | } else { |
| 402 | chan->local_addr = kmalloc(len + 1, GFP_KERNEL); |
| 403 | |
| 404 | if (!chan->local_addr) { |
| 405 | kfree(chan); |
| 406 | return -ENOMEM; |
| 407 | } |
| 408 | } |
| 409 | |
| 410 | strncpy(chan->local_addr, conf->local_addr, |
| 411 | WAN_ADDRESS_SZ); |
| 412 | } |
| 413 | |
| 414 | chan->svc = 1; |
| 415 | strncpy(chan->addr, &conf->addr[1], WAN_ADDRESS_SZ); |
| 416 | init_timer(&chan->timer); |
| 417 | chan->timer.function = cycx_x25_chan_timer; |
| 418 | chan->timer.data = (unsigned long)dev; |
| 419 | |
| 420 | /* Set channel timeouts (default if not specified) */ |
| 421 | chan->idle_tmout = conf->idle_timeout ? conf->idle_timeout : 90; |
Tobias Klauser | 8e18d1f | 2005-09-10 14:45:00 -0700 | [diff] [blame] | 422 | } else if (isdigit(conf->addr[0])) { /* PVC */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | s16 lcn = dec_to_uint(conf->addr, 0); |
| 424 | |
| 425 | if (lcn >= card->u.x.lo_pvc && lcn <= card->u.x.hi_pvc) |
| 426 | chan->lcn = lcn; |
| 427 | else { |
| 428 | printk(KERN_ERR |
| 429 | "%s: PVC %u is out of range on interface %s!\n", |
| 430 | wandev->name, lcn, chan->name); |
| 431 | err = -EINVAL; |
| 432 | } |
| 433 | } else { |
| 434 | printk(KERN_ERR "%s: invalid media address on interface %s!\n", |
| 435 | wandev->name, chan->name); |
| 436 | err = -EINVAL; |
| 437 | } |
| 438 | |
| 439 | if (err) { |
Jesper Juhl | 6a5d362 | 2005-05-03 14:33:27 -0700 | [diff] [blame] | 440 | kfree(chan->local_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | kfree(chan); |
| 442 | return err; |
| 443 | } |
| 444 | |
| 445 | /* prepare network device data space for registration */ |
| 446 | strcpy(dev->name, chan->name); |
| 447 | dev->init = cycx_netdevice_init; |
| 448 | dev->priv = chan; |
| 449 | |
| 450 | return 0; |
| 451 | } |
| 452 | |
| 453 | /* Delete logical channel. */ |
| 454 | static int cycx_wan_del_if(struct wan_device *wandev, struct net_device *dev) |
| 455 | { |
| 456 | if (dev->priv) { |
| 457 | struct cycx_x25_channel *chan = dev->priv; |
| 458 | |
| 459 | if (chan->svc) { |
Jesper Juhl | 6a5d362 | 2005-05-03 14:33:27 -0700 | [diff] [blame] | 460 | kfree(chan->local_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | if (chan->state == WAN_CONNECTED) |
| 462 | del_timer(&chan->timer); |
| 463 | } |
| 464 | |
| 465 | kfree(chan); |
| 466 | dev->priv = NULL; |
| 467 | } |
| 468 | |
| 469 | return 0; |
| 470 | } |
| 471 | |
Stephen Hemminger | 3b04ddd | 2007-10-09 01:40:57 -0700 | [diff] [blame] | 472 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | /* Network Device Interface */ |
Stephen Hemminger | 3b04ddd | 2007-10-09 01:40:57 -0700 | [diff] [blame] | 474 | |
| 475 | static const struct header_ops cycx_header_ops = { |
| 476 | .create = cycx_netdevice_hard_header, |
| 477 | .rebuild = cycx_netdevice_rebuild_header, |
| 478 | }; |
| 479 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | /* Initialize Linux network interface. |
| 481 | * |
| 482 | * This routine is called only once for each interface, during Linux network |
| 483 | * interface registration. Returning anything but zero will fail interface |
| 484 | * registration. */ |
| 485 | static int cycx_netdevice_init(struct net_device *dev) |
| 486 | { |
| 487 | struct cycx_x25_channel *chan = dev->priv; |
| 488 | struct cycx_device *card = chan->card; |
| 489 | struct wan_device *wandev = &card->wandev; |
| 490 | |
| 491 | /* Initialize device driver entry points */ |
| 492 | dev->open = cycx_netdevice_open; |
| 493 | dev->stop = cycx_netdevice_stop; |
Stephen Hemminger | 3b04ddd | 2007-10-09 01:40:57 -0700 | [diff] [blame] | 494 | dev->header_ops = &cycx_header_ops; |
| 495 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | dev->hard_start_xmit = cycx_netdevice_hard_start_xmit; |
| 497 | dev->get_stats = cycx_netdevice_get_stats; |
| 498 | |
| 499 | /* Initialize media-specific parameters */ |
| 500 | dev->mtu = CYCX_X25_CHAN_MTU; |
| 501 | dev->type = ARPHRD_HWX25; /* ARP h/w type */ |
| 502 | dev->hard_header_len = 0; /* media header length */ |
| 503 | dev->addr_len = 0; /* hardware address length */ |
| 504 | |
| 505 | if (!chan->svc) |
Al Viro | 7fd71e5 | 2007-12-22 17:27:24 +0000 | [diff] [blame^] | 506 | *(__be16*)dev->dev_addr = htons(chan->lcn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | |
| 508 | /* Initialize hardware parameters (just for reference) */ |
| 509 | dev->irq = wandev->irq; |
| 510 | dev->dma = wandev->dma; |
| 511 | dev->base_addr = wandev->ioport; |
| 512 | dev->mem_start = (unsigned long)wandev->maddr; |
| 513 | dev->mem_end = (unsigned long)(wandev->maddr + |
| 514 | wandev->msize - 1); |
| 515 | dev->flags |= IFF_NOARP; |
| 516 | |
| 517 | /* Set transmit buffer queue length */ |
| 518 | dev->tx_queue_len = 10; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | |
| 520 | /* Initialize socket buffers */ |
| 521 | cycx_x25_set_chan_state(dev, WAN_DISCONNECTED); |
| 522 | |
| 523 | return 0; |
| 524 | } |
| 525 | |
| 526 | /* Open network interface. |
| 527 | * o prevent module from unloading by incrementing use count |
| 528 | * o if link is disconnected then initiate connection |
| 529 | * |
| 530 | * Return 0 if O.k. or errno. */ |
| 531 | static int cycx_netdevice_open(struct net_device *dev) |
| 532 | { |
| 533 | if (netif_running(dev)) |
| 534 | return -EBUSY; /* only one open is allowed */ |
| 535 | |
| 536 | netif_start_queue(dev); |
| 537 | return 0; |
| 538 | } |
| 539 | |
| 540 | /* Close network interface. |
| 541 | * o reset flags. |
| 542 | * o if there's no more open channels then disconnect physical link. */ |
| 543 | static int cycx_netdevice_stop(struct net_device *dev) |
| 544 | { |
| 545 | struct cycx_x25_channel *chan = dev->priv; |
| 546 | |
| 547 | netif_stop_queue(dev); |
| 548 | |
| 549 | if (chan->state == WAN_CONNECTED || chan->state == WAN_CONNECTING) |
| 550 | cycx_x25_chan_disconnect(dev); |
| 551 | |
| 552 | return 0; |
| 553 | } |
| 554 | |
| 555 | /* Build media header. |
| 556 | * o encapsulate packet according to encapsulation type. |
| 557 | * |
| 558 | * The trick here is to put packet type (Ethertype) into 'protocol' field of |
| 559 | * the socket buffer, so that we don't forget it. If encapsulation fails, |
| 560 | * set skb->protocol to 0 and discard packet later. |
| 561 | * |
| 562 | * Return: media header length. */ |
| 563 | static int cycx_netdevice_hard_header(struct sk_buff *skb, |
| 564 | struct net_device *dev, u16 type, |
Stephen Hemminger | 3b04ddd | 2007-10-09 01:40:57 -0700 | [diff] [blame] | 565 | const void *daddr, const void *saddr, |
| 566 | unsigned len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 567 | { |
Al Viro | 7fd71e5 | 2007-12-22 17:27:24 +0000 | [diff] [blame^] | 568 | skb->protocol = htons(type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | |
| 570 | return dev->hard_header_len; |
| 571 | } |
| 572 | |
| 573 | /* * Re-build media header. |
| 574 | * Return: 1 physical address resolved. |
| 575 | * 0 physical address not resolved */ |
| 576 | static int cycx_netdevice_rebuild_header(struct sk_buff *skb) |
| 577 | { |
| 578 | return 1; |
| 579 | } |
| 580 | |
| 581 | /* Send a packet on a network interface. |
| 582 | * o set busy flag (marks start of the transmission). |
| 583 | * o check link state. If link is not up, then drop the packet. |
| 584 | * o check channel status. If it's down then initiate a call. |
| 585 | * o pass a packet to corresponding WAN device. |
| 586 | * o free socket buffer |
| 587 | * |
| 588 | * Return: 0 complete (socket buffer must be freed) |
| 589 | * non-0 packet may be re-transmitted (tbusy must be set) |
| 590 | * |
| 591 | * Notes: |
| 592 | * 1. This routine is called either by the protocol stack or by the "net |
| 593 | * bottom half" (with interrupts enabled). |
| 594 | * 2. Setting tbusy flag will inhibit further transmit requests from the |
| 595 | * protocol stack and can be used for flow control with protocol layer. */ |
| 596 | static int cycx_netdevice_hard_start_xmit(struct sk_buff *skb, |
| 597 | struct net_device *dev) |
| 598 | { |
| 599 | struct cycx_x25_channel *chan = dev->priv; |
| 600 | struct cycx_device *card = chan->card; |
| 601 | |
| 602 | if (!chan->svc) |
Al Viro | 7fd71e5 | 2007-12-22 17:27:24 +0000 | [diff] [blame^] | 603 | chan->protocol = ntohs(skb->protocol); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 604 | |
| 605 | if (card->wandev.state != WAN_CONNECTED) |
| 606 | ++chan->ifstats.tx_dropped; |
| 607 | else if (chan->svc && chan->protocol && |
Al Viro | 7fd71e5 | 2007-12-22 17:27:24 +0000 | [diff] [blame^] | 608 | chan->protocol != ntohs(skb->protocol)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | printk(KERN_INFO |
| 610 | "%s: unsupported Ethertype 0x%04X on interface %s!\n", |
Al Viro | 7fd71e5 | 2007-12-22 17:27:24 +0000 | [diff] [blame^] | 611 | card->devname, ntohs(skb->protocol), dev->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 612 | ++chan->ifstats.tx_errors; |
| 613 | } else if (chan->protocol == ETH_P_IP) { |
| 614 | switch (chan->state) { |
| 615 | case WAN_DISCONNECTED: |
| 616 | if (cycx_x25_chan_connect(dev)) { |
| 617 | netif_stop_queue(dev); |
| 618 | return -EBUSY; |
| 619 | } |
| 620 | /* fall thru */ |
| 621 | case WAN_CONNECTED: |
| 622 | reset_timer(dev); |
| 623 | dev->trans_start = jiffies; |
| 624 | netif_stop_queue(dev); |
| 625 | |
| 626 | if (cycx_x25_chan_send(dev, skb)) |
| 627 | return -EBUSY; |
| 628 | |
| 629 | break; |
| 630 | default: |
| 631 | ++chan->ifstats.tx_dropped; |
| 632 | ++card->wandev.stats.tx_dropped; |
| 633 | } |
| 634 | } else { /* chan->protocol == ETH_P_X25 */ |
| 635 | switch (skb->data[0]) { |
| 636 | case 0: break; |
| 637 | case 1: /* Connect request */ |
| 638 | cycx_x25_chan_connect(dev); |
| 639 | goto free_packet; |
| 640 | case 2: /* Disconnect request */ |
| 641 | cycx_x25_chan_disconnect(dev); |
| 642 | goto free_packet; |
| 643 | default: |
| 644 | printk(KERN_INFO |
| 645 | "%s: unknown %d x25-iface request on %s!\n", |
| 646 | card->devname, skb->data[0], dev->name); |
| 647 | ++chan->ifstats.tx_errors; |
| 648 | goto free_packet; |
| 649 | } |
| 650 | |
| 651 | skb_pull(skb, 1); /* Remove control byte */ |
| 652 | reset_timer(dev); |
| 653 | dev->trans_start = jiffies; |
| 654 | netif_stop_queue(dev); |
| 655 | |
| 656 | if (cycx_x25_chan_send(dev, skb)) { |
| 657 | /* prepare for future retransmissions */ |
| 658 | skb_push(skb, 1); |
| 659 | return -EBUSY; |
| 660 | } |
| 661 | } |
| 662 | |
| 663 | free_packet: |
| 664 | dev_kfree_skb(skb); |
| 665 | |
| 666 | return 0; |
| 667 | } |
| 668 | |
| 669 | /* Get Ethernet-style interface statistics. |
| 670 | * Return a pointer to struct net_device_stats */ |
| 671 | static struct net_device_stats *cycx_netdevice_get_stats(struct net_device *dev) |
| 672 | { |
| 673 | struct cycx_x25_channel *chan = dev->priv; |
| 674 | |
| 675 | return chan ? &chan->ifstats : NULL; |
| 676 | } |
| 677 | |
| 678 | /* Interrupt Handlers */ |
| 679 | /* X.25 Interrupt Service Routine. */ |
| 680 | static void cycx_x25_irq_handler(struct cycx_device *card) |
| 681 | { |
| 682 | struct cycx_x25_cmd cmd; |
| 683 | u16 z = 0; |
| 684 | |
| 685 | card->in_isr = 1; |
| 686 | card->buff_int_mode_unbusy = 0; |
| 687 | cycx_peek(&card->hw, X25_RXMBOX_OFFS, &cmd, sizeof(cmd)); |
| 688 | |
| 689 | switch (cmd.command) { |
| 690 | case X25_DATA_INDICATION: |
| 691 | cycx_x25_irq_rx(card, &cmd); |
| 692 | break; |
| 693 | case X25_ACK_FROM_VC: |
| 694 | cycx_x25_irq_tx(card, &cmd); |
| 695 | break; |
| 696 | case X25_LOG: |
| 697 | cycx_x25_irq_log(card, &cmd); |
| 698 | break; |
| 699 | case X25_STATISTIC: |
| 700 | cycx_x25_irq_stat(card, &cmd); |
| 701 | break; |
| 702 | case X25_CONNECT_CONFIRM: |
| 703 | cycx_x25_irq_connect_confirm(card, &cmd); |
| 704 | break; |
| 705 | case X25_CONNECT_INDICATION: |
| 706 | cycx_x25_irq_connect(card, &cmd); |
| 707 | break; |
| 708 | case X25_DISCONNECT_INDICATION: |
| 709 | cycx_x25_irq_disconnect(card, &cmd); |
| 710 | break; |
| 711 | case X25_DISCONNECT_CONFIRM: |
| 712 | cycx_x25_irq_disconnect_confirm(card, &cmd); |
| 713 | break; |
| 714 | case X25_LINE_ON: |
| 715 | cycx_set_state(card, WAN_CONNECTED); |
| 716 | break; |
| 717 | case X25_LINE_OFF: |
| 718 | cycx_set_state(card, WAN_DISCONNECTED); |
| 719 | break; |
| 720 | default: |
| 721 | cycx_x25_irq_spurious(card, &cmd); |
| 722 | break; |
| 723 | } |
| 724 | |
| 725 | cycx_poke(&card->hw, 0, &z, sizeof(z)); |
| 726 | cycx_poke(&card->hw, X25_RXMBOX_OFFS, &z, sizeof(z)); |
| 727 | card->in_isr = 0; |
| 728 | } |
| 729 | |
| 730 | /* Transmit interrupt handler. |
| 731 | * o Release socket buffer |
| 732 | * o Clear 'tbusy' flag */ |
| 733 | static void cycx_x25_irq_tx(struct cycx_device *card, struct cycx_x25_cmd *cmd) |
| 734 | { |
| 735 | struct net_device *dev; |
| 736 | struct wan_device *wandev = &card->wandev; |
| 737 | u8 lcn; |
| 738 | |
| 739 | cycx_peek(&card->hw, cmd->buf, &lcn, sizeof(lcn)); |
| 740 | |
| 741 | /* unbusy device and then dev_tint(); */ |
| 742 | dev = cycx_x25_get_dev_by_lcn(wandev, lcn); |
| 743 | if (dev) { |
| 744 | card->buff_int_mode_unbusy = 1; |
| 745 | netif_wake_queue(dev); |
| 746 | } else |
| 747 | printk(KERN_ERR "%s:ackvc for inexistent lcn %d\n", |
| 748 | card->devname, lcn); |
| 749 | } |
| 750 | |
| 751 | /* Receive interrupt handler. |
| 752 | * This routine handles fragmented IP packets using M-bit according to the |
| 753 | * RFC1356. |
| 754 | * o map logical channel number to network interface. |
| 755 | * o allocate socket buffer or append received packet to the existing one. |
| 756 | * o if M-bit is reset (i.e. it's the last packet in a sequence) then |
| 757 | * decapsulate packet and pass socket buffer to the protocol stack. |
| 758 | * |
| 759 | * Notes: |
| 760 | * 1. When allocating a socket buffer, if M-bit is set then more data is |
| 761 | * coming and we have to allocate buffer for the maximum IP packet size |
| 762 | * expected on this channel. |
| 763 | * 2. If something goes wrong and X.25 packet has to be dropped (e.g. no |
| 764 | * socket buffers available) the whole packet sequence must be discarded. */ |
| 765 | static void cycx_x25_irq_rx(struct cycx_device *card, struct cycx_x25_cmd *cmd) |
| 766 | { |
| 767 | struct wan_device *wandev = &card->wandev; |
| 768 | struct net_device *dev; |
| 769 | struct cycx_x25_channel *chan; |
| 770 | struct sk_buff *skb; |
| 771 | u8 bitm, lcn; |
| 772 | int pktlen = cmd->len - 5; |
| 773 | |
| 774 | cycx_peek(&card->hw, cmd->buf, &lcn, sizeof(lcn)); |
| 775 | cycx_peek(&card->hw, cmd->buf + 4, &bitm, sizeof(bitm)); |
| 776 | bitm &= 0x10; |
| 777 | |
| 778 | dev = cycx_x25_get_dev_by_lcn(wandev, lcn); |
| 779 | if (!dev) { |
| 780 | /* Invalid channel, discard packet */ |
| 781 | printk(KERN_INFO "%s: receiving on orphaned LCN %d!\n", |
| 782 | card->devname, lcn); |
| 783 | return; |
| 784 | } |
| 785 | |
| 786 | chan = dev->priv; |
| 787 | reset_timer(dev); |
| 788 | |
| 789 | if (chan->drop_sequence) { |
| 790 | if (!bitm) |
| 791 | chan->drop_sequence = 0; |
| 792 | else |
| 793 | return; |
| 794 | } |
| 795 | |
| 796 | if ((skb = chan->rx_skb) == NULL) { |
| 797 | /* Allocate new socket buffer */ |
| 798 | int bufsize = bitm ? dev->mtu : pktlen; |
| 799 | |
| 800 | if ((skb = dev_alloc_skb((chan->protocol == ETH_P_X25 ? 1 : 0) + |
| 801 | bufsize + |
| 802 | dev->hard_header_len)) == NULL) { |
| 803 | printk(KERN_INFO "%s: no socket buffers available!\n", |
| 804 | card->devname); |
| 805 | chan->drop_sequence = 1; |
| 806 | ++chan->ifstats.rx_dropped; |
| 807 | return; |
| 808 | } |
| 809 | |
| 810 | if (chan->protocol == ETH_P_X25) /* X.25 socket layer control */ |
| 811 | /* 0 = data packet (dev_alloc_skb zeroed skb->data) */ |
| 812 | skb_put(skb, 1); |
| 813 | |
| 814 | skb->dev = dev; |
| 815 | skb->protocol = htons(chan->protocol); |
| 816 | chan->rx_skb = skb; |
| 817 | } |
| 818 | |
| 819 | if (skb_tailroom(skb) < pktlen) { |
| 820 | /* No room for the packet. Call off the whole thing! */ |
| 821 | dev_kfree_skb_irq(skb); |
| 822 | chan->rx_skb = NULL; |
| 823 | |
| 824 | if (bitm) |
| 825 | chan->drop_sequence = 1; |
| 826 | |
| 827 | printk(KERN_INFO "%s: unexpectedly long packet sequence " |
| 828 | "on interface %s!\n", card->devname, dev->name); |
| 829 | ++chan->ifstats.rx_length_errors; |
| 830 | return; |
| 831 | } |
| 832 | |
| 833 | /* Append packet to the socket buffer */ |
| 834 | cycx_peek(&card->hw, cmd->buf + 5, skb_put(skb, pktlen), pktlen); |
| 835 | |
| 836 | if (bitm) |
| 837 | return; /* more data is coming */ |
| 838 | |
| 839 | chan->rx_skb = NULL; /* dequeue packet */ |
| 840 | |
| 841 | ++chan->ifstats.rx_packets; |
| 842 | chan->ifstats.rx_bytes += pktlen; |
| 843 | |
Arnaldo Carvalho de Melo | 459a98e | 2007-03-19 15:30:44 -0700 | [diff] [blame] | 844 | skb_reset_mac_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 845 | netif_rx(skb); |
| 846 | dev->last_rx = jiffies; /* timestamp */ |
| 847 | } |
| 848 | |
| 849 | /* Connect interrupt handler. */ |
| 850 | static void cycx_x25_irq_connect(struct cycx_device *card, |
| 851 | struct cycx_x25_cmd *cmd) |
| 852 | { |
| 853 | struct wan_device *wandev = &card->wandev; |
| 854 | struct net_device *dev = NULL; |
| 855 | struct cycx_x25_channel *chan; |
| 856 | u8 d[32], |
| 857 | loc[24], |
| 858 | rem[24]; |
| 859 | u8 lcn, sizeloc, sizerem; |
| 860 | |
| 861 | cycx_peek(&card->hw, cmd->buf, &lcn, sizeof(lcn)); |
| 862 | cycx_peek(&card->hw, cmd->buf + 5, &sizeloc, sizeof(sizeloc)); |
| 863 | cycx_peek(&card->hw, cmd->buf + 6, d, cmd->len - 6); |
| 864 | |
| 865 | sizerem = sizeloc >> 4; |
| 866 | sizeloc &= 0x0F; |
| 867 | |
| 868 | loc[0] = rem[0] = '\0'; |
| 869 | |
| 870 | if (sizeloc) |
| 871 | nibble_to_byte(d, loc, sizeloc, 0); |
| 872 | |
| 873 | if (sizerem) |
| 874 | nibble_to_byte(d + (sizeloc >> 1), rem, sizerem, sizeloc & 1); |
| 875 | |
| 876 | dprintk(1, KERN_INFO "%s:lcn=%d, local=%s, remote=%s\n", |
| 877 | __FUNCTION__, lcn, loc, rem); |
| 878 | |
| 879 | dev = cycx_x25_get_dev_by_dte_addr(wandev, rem); |
| 880 | if (!dev) { |
| 881 | /* Invalid channel, discard packet */ |
| 882 | printk(KERN_INFO "%s: connect not expected: remote %s!\n", |
| 883 | card->devname, rem); |
| 884 | return; |
| 885 | } |
| 886 | |
| 887 | chan = dev->priv; |
| 888 | chan->lcn = lcn; |
| 889 | cycx_x25_connect_response(card, chan); |
| 890 | cycx_x25_set_chan_state(dev, WAN_CONNECTED); |
| 891 | } |
| 892 | |
| 893 | /* Connect confirm interrupt handler. */ |
| 894 | static void cycx_x25_irq_connect_confirm(struct cycx_device *card, |
| 895 | struct cycx_x25_cmd *cmd) |
| 896 | { |
| 897 | struct wan_device *wandev = &card->wandev; |
| 898 | struct net_device *dev; |
| 899 | struct cycx_x25_channel *chan; |
| 900 | u8 lcn, key; |
| 901 | |
| 902 | cycx_peek(&card->hw, cmd->buf, &lcn, sizeof(lcn)); |
| 903 | cycx_peek(&card->hw, cmd->buf + 1, &key, sizeof(key)); |
| 904 | dprintk(1, KERN_INFO "%s: %s:lcn=%d, key=%d\n", |
| 905 | card->devname, __FUNCTION__, lcn, key); |
| 906 | |
| 907 | dev = cycx_x25_get_dev_by_lcn(wandev, -key); |
| 908 | if (!dev) { |
| 909 | /* Invalid channel, discard packet */ |
| 910 | clear_bit(--key, (void*)&card->u.x.connection_keys); |
| 911 | printk(KERN_INFO "%s: connect confirm not expected: lcn %d, " |
| 912 | "key=%d!\n", card->devname, lcn, key); |
| 913 | return; |
| 914 | } |
| 915 | |
| 916 | clear_bit(--key, (void*)&card->u.x.connection_keys); |
| 917 | chan = dev->priv; |
| 918 | chan->lcn = lcn; |
| 919 | cycx_x25_set_chan_state(dev, WAN_CONNECTED); |
| 920 | } |
| 921 | |
| 922 | /* Disconnect confirm interrupt handler. */ |
| 923 | static void cycx_x25_irq_disconnect_confirm(struct cycx_device *card, |
| 924 | struct cycx_x25_cmd *cmd) |
| 925 | { |
| 926 | struct wan_device *wandev = &card->wandev; |
| 927 | struct net_device *dev; |
| 928 | u8 lcn; |
| 929 | |
| 930 | cycx_peek(&card->hw, cmd->buf, &lcn, sizeof(lcn)); |
| 931 | dprintk(1, KERN_INFO "%s: %s:lcn=%d\n", |
| 932 | card->devname, __FUNCTION__, lcn); |
| 933 | dev = cycx_x25_get_dev_by_lcn(wandev, lcn); |
| 934 | if (!dev) { |
| 935 | /* Invalid channel, discard packet */ |
| 936 | printk(KERN_INFO "%s:disconnect confirm not expected!:lcn %d\n", |
| 937 | card->devname, lcn); |
| 938 | return; |
| 939 | } |
| 940 | |
| 941 | cycx_x25_set_chan_state(dev, WAN_DISCONNECTED); |
| 942 | } |
| 943 | |
| 944 | /* disconnect interrupt handler. */ |
| 945 | static void cycx_x25_irq_disconnect(struct cycx_device *card, |
| 946 | struct cycx_x25_cmd *cmd) |
| 947 | { |
| 948 | struct wan_device *wandev = &card->wandev; |
| 949 | struct net_device *dev; |
| 950 | u8 lcn; |
| 951 | |
| 952 | cycx_peek(&card->hw, cmd->buf, &lcn, sizeof(lcn)); |
| 953 | dprintk(1, KERN_INFO "%s:lcn=%d\n", __FUNCTION__, lcn); |
| 954 | |
| 955 | dev = cycx_x25_get_dev_by_lcn(wandev, lcn); |
| 956 | if (dev) { |
| 957 | struct cycx_x25_channel *chan = dev->priv; |
| 958 | |
| 959 | cycx_x25_disconnect_response(card, chan->link, lcn); |
| 960 | cycx_x25_set_chan_state(dev, WAN_DISCONNECTED); |
| 961 | } else |
| 962 | cycx_x25_disconnect_response(card, 0, lcn); |
| 963 | } |
| 964 | |
| 965 | /* LOG interrupt handler. */ |
| 966 | static void cycx_x25_irq_log(struct cycx_device *card, struct cycx_x25_cmd *cmd) |
| 967 | { |
| 968 | #if CYCLOMX_X25_DEBUG |
| 969 | char bf[20]; |
| 970 | u16 size, toread, link, msg_code; |
| 971 | u8 code, routine; |
| 972 | |
| 973 | cycx_peek(&card->hw, cmd->buf, &msg_code, sizeof(msg_code)); |
| 974 | cycx_peek(&card->hw, cmd->buf + 2, &link, sizeof(link)); |
| 975 | cycx_peek(&card->hw, cmd->buf + 4, &size, sizeof(size)); |
| 976 | /* at most 20 bytes are available... thanks to Daniela :) */ |
| 977 | toread = size < 20 ? size : 20; |
| 978 | cycx_peek(&card->hw, cmd->buf + 10, &bf, toread); |
| 979 | cycx_peek(&card->hw, cmd->buf + 10 + toread, &code, 1); |
| 980 | cycx_peek(&card->hw, cmd->buf + 10 + toread + 1, &routine, 1); |
| 981 | |
| 982 | printk(KERN_INFO "cycx_x25_irq_handler: X25_LOG (0x4500) indic.:\n"); |
| 983 | printk(KERN_INFO "cmd->buf=0x%X\n", cmd->buf); |
| 984 | printk(KERN_INFO "Log message code=0x%X\n", msg_code); |
| 985 | printk(KERN_INFO "Link=%d\n", link); |
| 986 | printk(KERN_INFO "log code=0x%X\n", code); |
| 987 | printk(KERN_INFO "log routine=0x%X\n", routine); |
| 988 | printk(KERN_INFO "Message size=%d\n", size); |
| 989 | hex_dump("Message", bf, toread); |
| 990 | #endif |
| 991 | } |
| 992 | |
| 993 | /* STATISTIC interrupt handler. */ |
| 994 | static void cycx_x25_irq_stat(struct cycx_device *card, |
| 995 | struct cycx_x25_cmd *cmd) |
| 996 | { |
| 997 | cycx_peek(&card->hw, cmd->buf, &card->u.x.stats, |
| 998 | sizeof(card->u.x.stats)); |
| 999 | hex_dump("cycx_x25_irq_stat", (unsigned char*)&card->u.x.stats, |
| 1000 | sizeof(card->u.x.stats)); |
| 1001 | cycx_x25_dump_stats(&card->u.x.stats); |
| 1002 | wake_up_interruptible(&card->wait_stats); |
| 1003 | } |
| 1004 | |
| 1005 | /* Spurious interrupt handler. |
| 1006 | * o print a warning |
| 1007 | * If number of spurious interrupts exceeded some limit, then ??? */ |
| 1008 | static void cycx_x25_irq_spurious(struct cycx_device *card, |
| 1009 | struct cycx_x25_cmd *cmd) |
| 1010 | { |
| 1011 | printk(KERN_INFO "%s: spurious interrupt (0x%X)!\n", |
| 1012 | card->devname, cmd->command); |
| 1013 | } |
| 1014 | #ifdef CYCLOMX_X25_DEBUG |
| 1015 | static void hex_dump(char *msg, unsigned char *p, int len) |
| 1016 | { |
| 1017 | unsigned char hex[1024], |
| 1018 | * phex = hex; |
| 1019 | |
| 1020 | if (len >= (sizeof(hex) / 2)) |
| 1021 | len = (sizeof(hex) / 2) - 1; |
| 1022 | |
| 1023 | while (len--) { |
| 1024 | sprintf(phex, "%02x", *p++); |
| 1025 | phex += 2; |
| 1026 | } |
| 1027 | |
| 1028 | printk(KERN_INFO "%s: %s\n", msg, hex); |
| 1029 | } |
| 1030 | #endif |
| 1031 | |
| 1032 | /* Cyclom 2X Firmware-Specific Functions */ |
| 1033 | /* Exec X.25 command. */ |
| 1034 | static int x25_exec(struct cycx_device *card, int command, int link, |
| 1035 | void *d1, int len1, void *d2, int len2) |
| 1036 | { |
| 1037 | struct cycx_x25_cmd c; |
| 1038 | unsigned long flags; |
| 1039 | u32 addr = 0x1200 + 0x2E0 * link + 0x1E2; |
| 1040 | u8 retry = CYCX_X25_MAX_CMD_RETRY; |
| 1041 | int err = 0; |
| 1042 | |
| 1043 | c.command = command; |
| 1044 | c.link = link; |
| 1045 | c.len = len1 + len2; |
| 1046 | |
| 1047 | spin_lock_irqsave(&card->u.x.lock, flags); |
| 1048 | |
| 1049 | /* write command */ |
| 1050 | cycx_poke(&card->hw, X25_MBOX_OFFS, &c, sizeof(c) - sizeof(c.buf)); |
| 1051 | |
| 1052 | /* write X.25 data */ |
| 1053 | if (d1) { |
| 1054 | cycx_poke(&card->hw, addr, d1, len1); |
| 1055 | |
| 1056 | if (d2) { |
| 1057 | if (len2 > 254) { |
| 1058 | u32 addr1 = 0xA00 + 0x400 * link; |
| 1059 | |
| 1060 | cycx_poke(&card->hw, addr + len1, d2, 249); |
| 1061 | cycx_poke(&card->hw, addr1, ((u8*)d2) + 249, |
| 1062 | len2 - 249); |
| 1063 | } else |
| 1064 | cycx_poke(&card->hw, addr + len1, d2, len2); |
| 1065 | } |
| 1066 | } |
| 1067 | |
| 1068 | /* generate interruption, executing command */ |
| 1069 | cycx_intr(&card->hw); |
| 1070 | |
| 1071 | /* wait till card->mbox == 0 */ |
| 1072 | do { |
| 1073 | err = cycx_exec(card->mbox); |
| 1074 | } while (retry-- && err); |
| 1075 | |
| 1076 | spin_unlock_irqrestore(&card->u.x.lock, flags); |
| 1077 | |
| 1078 | return err; |
| 1079 | } |
| 1080 | |
| 1081 | /* Configure adapter. */ |
| 1082 | static int cycx_x25_configure(struct cycx_device *card, |
| 1083 | struct cycx_x25_config *conf) |
| 1084 | { |
| 1085 | struct { |
| 1086 | u16 nlinks; |
| 1087 | struct cycx_x25_config conf[2]; |
| 1088 | } x25_cmd_conf; |
| 1089 | |
| 1090 | memset(&x25_cmd_conf, 0, sizeof(x25_cmd_conf)); |
| 1091 | x25_cmd_conf.nlinks = 2; |
| 1092 | x25_cmd_conf.conf[0] = *conf; |
| 1093 | /* FIXME: we need to find a way in the wanrouter framework |
| 1094 | to configure the second link, for now lets use it |
| 1095 | with the same config from the first link, fixing |
| 1096 | the interface type to RS232, the speed in 38400 and |
| 1097 | the clock to external */ |
| 1098 | x25_cmd_conf.conf[1] = *conf; |
| 1099 | x25_cmd_conf.conf[1].link = 1; |
| 1100 | x25_cmd_conf.conf[1].speed = 5; /* 38400 */ |
| 1101 | x25_cmd_conf.conf[1].clock = 8; |
| 1102 | x25_cmd_conf.conf[1].flags = 0; /* default = RS232 */ |
| 1103 | |
| 1104 | cycx_x25_dump_config(&x25_cmd_conf.conf[0]); |
| 1105 | cycx_x25_dump_config(&x25_cmd_conf.conf[1]); |
| 1106 | |
| 1107 | return x25_exec(card, X25_CONFIG, 0, |
| 1108 | &x25_cmd_conf, sizeof(x25_cmd_conf), NULL, 0); |
| 1109 | } |
| 1110 | |
| 1111 | /* Get protocol statistics. */ |
| 1112 | static int cycx_x25_get_stats(struct cycx_device *card) |
| 1113 | { |
| 1114 | /* the firmware expects 20 in the size field!!! |
| 1115 | thanks to Daniela */ |
| 1116 | int err = x25_exec(card, X25_STATISTIC, 0, NULL, 20, NULL, 0); |
| 1117 | |
| 1118 | if (err) |
| 1119 | return err; |
| 1120 | |
| 1121 | interruptible_sleep_on(&card->wait_stats); |
| 1122 | |
| 1123 | if (signal_pending(current)) |
| 1124 | return -EINTR; |
| 1125 | |
| 1126 | card->wandev.stats.rx_packets = card->u.x.stats.n2_rx_frames; |
| 1127 | card->wandev.stats.rx_over_errors = card->u.x.stats.rx_over_errors; |
| 1128 | card->wandev.stats.rx_crc_errors = card->u.x.stats.rx_crc_errors; |
| 1129 | card->wandev.stats.rx_length_errors = 0; /* not available from fw */ |
| 1130 | card->wandev.stats.rx_frame_errors = 0; /* not available from fw */ |
| 1131 | card->wandev.stats.rx_missed_errors = card->u.x.stats.rx_aborts; |
| 1132 | card->wandev.stats.rx_dropped = 0; /* not available from fw */ |
| 1133 | card->wandev.stats.rx_errors = 0; /* not available from fw */ |
| 1134 | card->wandev.stats.tx_packets = card->u.x.stats.n2_tx_frames; |
| 1135 | card->wandev.stats.tx_aborted_errors = card->u.x.stats.tx_aborts; |
| 1136 | card->wandev.stats.tx_dropped = 0; /* not available from fw */ |
| 1137 | card->wandev.stats.collisions = 0; /* not available from fw */ |
| 1138 | card->wandev.stats.tx_errors = 0; /* not available from fw */ |
| 1139 | |
| 1140 | cycx_x25_dump_devs(&card->wandev); |
| 1141 | |
| 1142 | return 0; |
| 1143 | } |
| 1144 | |
| 1145 | /* return the number of nibbles */ |
| 1146 | static int byte_to_nibble(u8 *s, u8 *d, char *nibble) |
| 1147 | { |
| 1148 | int i = 0; |
| 1149 | |
| 1150 | if (*nibble && *s) { |
| 1151 | d[i] |= *s++ - '0'; |
| 1152 | *nibble = 0; |
| 1153 | ++i; |
| 1154 | } |
| 1155 | |
| 1156 | while (*s) { |
| 1157 | d[i] = (*s - '0') << 4; |
| 1158 | if (*(s + 1)) |
| 1159 | d[i] |= *(s + 1) - '0'; |
| 1160 | else { |
| 1161 | *nibble = 1; |
| 1162 | break; |
| 1163 | } |
| 1164 | ++i; |
| 1165 | s += 2; |
| 1166 | } |
| 1167 | |
| 1168 | return i; |
| 1169 | } |
| 1170 | |
| 1171 | static void nibble_to_byte(u8 *s, u8 *d, u8 len, u8 nibble) |
| 1172 | { |
| 1173 | if (nibble) { |
| 1174 | *d++ = '0' + (*s++ & 0x0F); |
| 1175 | --len; |
| 1176 | } |
| 1177 | |
| 1178 | while (len) { |
| 1179 | *d++ = '0' + (*s >> 4); |
| 1180 | |
| 1181 | if (--len) { |
| 1182 | *d++ = '0' + (*s & 0x0F); |
| 1183 | --len; |
| 1184 | } else break; |
| 1185 | |
| 1186 | ++s; |
| 1187 | } |
| 1188 | |
| 1189 | *d = '\0'; |
| 1190 | } |
| 1191 | |
| 1192 | /* Place X.25 call. */ |
| 1193 | static int x25_place_call(struct cycx_device *card, |
| 1194 | struct cycx_x25_channel *chan) |
| 1195 | { |
| 1196 | int err = 0, |
| 1197 | len; |
| 1198 | char d[64], |
| 1199 | nibble = 0, |
| 1200 | mylen = chan->local_addr ? strlen(chan->local_addr) : 0, |
| 1201 | remotelen = strlen(chan->addr); |
| 1202 | u8 key; |
| 1203 | |
| 1204 | if (card->u.x.connection_keys == ~0U) { |
| 1205 | printk(KERN_INFO "%s: too many simultaneous connection " |
| 1206 | "requests!\n", card->devname); |
| 1207 | return -EAGAIN; |
| 1208 | } |
| 1209 | |
| 1210 | key = ffz(card->u.x.connection_keys); |
| 1211 | set_bit(key, (void*)&card->u.x.connection_keys); |
| 1212 | ++key; |
| 1213 | dprintk(1, KERN_INFO "%s:x25_place_call:key=%d\n", card->devname, key); |
| 1214 | memset(d, 0, sizeof(d)); |
| 1215 | d[1] = key; /* user key */ |
| 1216 | d[2] = 0x10; |
| 1217 | d[4] = 0x0B; |
| 1218 | |
| 1219 | len = byte_to_nibble(chan->addr, d + 6, &nibble); |
| 1220 | |
| 1221 | if (chan->local_addr) |
| 1222 | len += byte_to_nibble(chan->local_addr, d + 6 + len, &nibble); |
| 1223 | |
| 1224 | if (nibble) |
| 1225 | ++len; |
| 1226 | |
| 1227 | d[5] = mylen << 4 | remotelen; |
| 1228 | d[6 + len + 1] = 0xCC; /* TCP/IP over X.25, thanks to Daniela :) */ |
| 1229 | |
| 1230 | if ((err = x25_exec(card, X25_CONNECT_REQUEST, chan->link, |
| 1231 | &d, 7 + len + 1, NULL, 0)) != 0) |
| 1232 | clear_bit(--key, (void*)&card->u.x.connection_keys); |
| 1233 | else |
| 1234 | chan->lcn = -key; |
| 1235 | |
| 1236 | return err; |
| 1237 | } |
| 1238 | |
| 1239 | /* Place X.25 CONNECT RESPONSE. */ |
| 1240 | static int cycx_x25_connect_response(struct cycx_device *card, |
| 1241 | struct cycx_x25_channel *chan) |
| 1242 | { |
| 1243 | u8 d[8]; |
| 1244 | |
| 1245 | memset(d, 0, sizeof(d)); |
| 1246 | d[0] = d[3] = chan->lcn; |
| 1247 | d[2] = 0x10; |
| 1248 | d[4] = 0x0F; |
| 1249 | d[7] = 0xCC; /* TCP/IP over X.25, thanks Daniela */ |
| 1250 | |
| 1251 | return x25_exec(card, X25_CONNECT_RESPONSE, chan->link, &d, 8, NULL, 0); |
| 1252 | } |
| 1253 | |
| 1254 | /* Place X.25 DISCONNECT RESPONSE. */ |
| 1255 | static int cycx_x25_disconnect_response(struct cycx_device *card, u8 link, |
| 1256 | u8 lcn) |
| 1257 | { |
| 1258 | char d[5]; |
| 1259 | |
| 1260 | memset(d, 0, sizeof(d)); |
| 1261 | d[0] = d[3] = lcn; |
| 1262 | d[2] = 0x10; |
| 1263 | d[4] = 0x17; |
| 1264 | |
| 1265 | return x25_exec(card, X25_DISCONNECT_RESPONSE, link, &d, 5, NULL, 0); |
| 1266 | } |
| 1267 | |
| 1268 | /* Clear X.25 call. */ |
| 1269 | static int x25_clear_call(struct cycx_device *card, u8 link, u8 lcn, u8 cause, |
| 1270 | u8 diagn) |
| 1271 | { |
| 1272 | u8 d[7]; |
| 1273 | |
| 1274 | memset(d, 0, sizeof(d)); |
| 1275 | d[0] = d[3] = lcn; |
| 1276 | d[2] = 0x10; |
| 1277 | d[4] = 0x13; |
| 1278 | d[5] = cause; |
| 1279 | d[6] = diagn; |
| 1280 | |
| 1281 | return x25_exec(card, X25_DISCONNECT_REQUEST, link, d, 7, NULL, 0); |
| 1282 | } |
| 1283 | |
| 1284 | /* Send X.25 data packet. */ |
| 1285 | static int cycx_x25_send(struct cycx_device *card, u8 link, u8 lcn, u8 bitm, |
| 1286 | int len, void *buf) |
| 1287 | { |
| 1288 | u8 d[] = "?\xFF\x10??"; |
| 1289 | |
| 1290 | d[0] = d[3] = lcn; |
| 1291 | d[4] = bitm; |
| 1292 | |
| 1293 | return x25_exec(card, X25_DATA_REQUEST, link, &d, 5, buf, len); |
| 1294 | } |
| 1295 | |
| 1296 | /* Miscellaneous */ |
| 1297 | /* Find network device by its channel number. */ |
| 1298 | static struct net_device *cycx_x25_get_dev_by_lcn(struct wan_device *wandev, |
| 1299 | s16 lcn) |
| 1300 | { |
| 1301 | struct net_device *dev = wandev->dev; |
| 1302 | struct cycx_x25_channel *chan; |
| 1303 | |
| 1304 | while (dev) { |
| 1305 | chan = (struct cycx_x25_channel*)dev->priv; |
| 1306 | |
| 1307 | if (chan->lcn == lcn) |
| 1308 | break; |
| 1309 | dev = chan->slave; |
| 1310 | } |
| 1311 | return dev; |
| 1312 | } |
| 1313 | |
| 1314 | /* Find network device by its remote dte address. */ |
| 1315 | static struct net_device * |
| 1316 | cycx_x25_get_dev_by_dte_addr(struct wan_device *wandev, char *dte) |
| 1317 | { |
| 1318 | struct net_device *dev = wandev->dev; |
| 1319 | struct cycx_x25_channel *chan; |
| 1320 | |
| 1321 | while (dev) { |
| 1322 | chan = (struct cycx_x25_channel*)dev->priv; |
| 1323 | |
| 1324 | if (!strcmp(chan->addr, dte)) |
| 1325 | break; |
| 1326 | dev = chan->slave; |
| 1327 | } |
| 1328 | return dev; |
| 1329 | } |
| 1330 | |
| 1331 | /* Initiate connection on the logical channel. |
| 1332 | * o for PVC we just get channel configuration |
| 1333 | * o for SVCs place an X.25 call |
| 1334 | * |
| 1335 | * Return: 0 connected |
| 1336 | * >0 connection in progress |
| 1337 | * <0 failure */ |
| 1338 | static int cycx_x25_chan_connect(struct net_device *dev) |
| 1339 | { |
| 1340 | struct cycx_x25_channel *chan = dev->priv; |
| 1341 | struct cycx_device *card = chan->card; |
| 1342 | |
| 1343 | if (chan->svc) { |
| 1344 | if (!chan->addr[0]) |
| 1345 | return -EINVAL; /* no destination address */ |
| 1346 | |
| 1347 | dprintk(1, KERN_INFO "%s: placing X.25 call to %s...\n", |
| 1348 | card->devname, chan->addr); |
| 1349 | |
| 1350 | if (x25_place_call(card, chan)) |
| 1351 | return -EIO; |
| 1352 | |
| 1353 | cycx_x25_set_chan_state(dev, WAN_CONNECTING); |
| 1354 | return 1; |
| 1355 | } else |
| 1356 | cycx_x25_set_chan_state(dev, WAN_CONNECTED); |
| 1357 | |
| 1358 | return 0; |
| 1359 | } |
| 1360 | |
| 1361 | /* Disconnect logical channel. |
| 1362 | * o if SVC then clear X.25 call */ |
| 1363 | static void cycx_x25_chan_disconnect(struct net_device *dev) |
| 1364 | { |
| 1365 | struct cycx_x25_channel *chan = dev->priv; |
| 1366 | |
| 1367 | if (chan->svc) { |
| 1368 | x25_clear_call(chan->card, chan->link, chan->lcn, 0, 0); |
| 1369 | cycx_x25_set_chan_state(dev, WAN_DISCONNECTING); |
| 1370 | } else |
| 1371 | cycx_x25_set_chan_state(dev, WAN_DISCONNECTED); |
| 1372 | } |
| 1373 | |
| 1374 | /* Called by kernel timer */ |
| 1375 | static void cycx_x25_chan_timer(unsigned long d) |
| 1376 | { |
| 1377 | struct net_device *dev = (struct net_device *)d; |
| 1378 | struct cycx_x25_channel *chan = dev->priv; |
| 1379 | |
| 1380 | if (chan->state == WAN_CONNECTED) |
| 1381 | cycx_x25_chan_disconnect(dev); |
| 1382 | else |
| 1383 | printk(KERN_ERR "%s: %s for svc (%s) not connected!\n", |
| 1384 | chan->card->devname, __FUNCTION__, dev->name); |
| 1385 | } |
| 1386 | |
| 1387 | /* Set logical channel state. */ |
| 1388 | static void cycx_x25_set_chan_state(struct net_device *dev, u8 state) |
| 1389 | { |
| 1390 | struct cycx_x25_channel *chan = dev->priv; |
| 1391 | struct cycx_device *card = chan->card; |
| 1392 | unsigned long flags; |
| 1393 | char *string_state = NULL; |
| 1394 | |
| 1395 | spin_lock_irqsave(&card->lock, flags); |
| 1396 | |
| 1397 | if (chan->state != state) { |
| 1398 | if (chan->svc && chan->state == WAN_CONNECTED) |
| 1399 | del_timer(&chan->timer); |
| 1400 | |
| 1401 | switch (state) { |
| 1402 | case WAN_CONNECTED: |
| 1403 | string_state = "connected!"; |
Al Viro | 7fd71e5 | 2007-12-22 17:27:24 +0000 | [diff] [blame^] | 1404 | *(__be16*)dev->dev_addr = htons(chan->lcn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1405 | netif_wake_queue(dev); |
| 1406 | reset_timer(dev); |
| 1407 | |
| 1408 | if (chan->protocol == ETH_P_X25) |
| 1409 | cycx_x25_chan_send_event(dev, 1); |
| 1410 | |
| 1411 | break; |
| 1412 | case WAN_CONNECTING: |
| 1413 | string_state = "connecting..."; |
| 1414 | break; |
| 1415 | case WAN_DISCONNECTING: |
| 1416 | string_state = "disconnecting..."; |
| 1417 | break; |
| 1418 | case WAN_DISCONNECTED: |
| 1419 | string_state = "disconnected!"; |
| 1420 | |
| 1421 | if (chan->svc) { |
| 1422 | *(unsigned short*)dev->dev_addr = 0; |
| 1423 | chan->lcn = 0; |
| 1424 | } |
| 1425 | |
| 1426 | if (chan->protocol == ETH_P_X25) |
| 1427 | cycx_x25_chan_send_event(dev, 2); |
| 1428 | |
| 1429 | netif_wake_queue(dev); |
| 1430 | break; |
| 1431 | } |
| 1432 | |
| 1433 | printk(KERN_INFO "%s: interface %s %s\n", card->devname, |
| 1434 | dev->name, string_state); |
| 1435 | chan->state = state; |
| 1436 | } |
| 1437 | |
| 1438 | spin_unlock_irqrestore(&card->lock, flags); |
| 1439 | } |
| 1440 | |
| 1441 | /* Send packet on a logical channel. |
| 1442 | * When this function is called, tx_skb field of the channel data space |
| 1443 | * points to the transmit socket buffer. When transmission is complete, |
| 1444 | * release socket buffer and reset 'tbusy' flag. |
| 1445 | * |
| 1446 | * Return: 0 - transmission complete |
| 1447 | * 1 - busy |
| 1448 | * |
| 1449 | * Notes: |
| 1450 | * 1. If packet length is greater than MTU for this channel, we'll fragment |
| 1451 | * the packet into 'complete sequence' using M-bit. |
| 1452 | * 2. When transmission is complete, an event notification should be issued |
| 1453 | * to the router. */ |
| 1454 | static int cycx_x25_chan_send(struct net_device *dev, struct sk_buff *skb) |
| 1455 | { |
| 1456 | struct cycx_x25_channel *chan = dev->priv; |
| 1457 | struct cycx_device *card = chan->card; |
| 1458 | int bitm = 0; /* final packet */ |
| 1459 | unsigned len = skb->len; |
| 1460 | |
| 1461 | if (skb->len > card->wandev.mtu) { |
| 1462 | len = card->wandev.mtu; |
| 1463 | bitm = 0x10; /* set M-bit (more data) */ |
| 1464 | } |
| 1465 | |
| 1466 | if (cycx_x25_send(card, chan->link, chan->lcn, bitm, len, skb->data)) |
| 1467 | return 1; |
| 1468 | |
| 1469 | if (bitm) { |
| 1470 | skb_pull(skb, len); |
| 1471 | return 1; |
| 1472 | } |
| 1473 | |
| 1474 | ++chan->ifstats.tx_packets; |
| 1475 | chan->ifstats.tx_bytes += len; |
| 1476 | |
| 1477 | return 0; |
| 1478 | } |
| 1479 | |
| 1480 | /* Send event (connection, disconnection, etc) to X.25 socket layer */ |
| 1481 | |
| 1482 | static void cycx_x25_chan_send_event(struct net_device *dev, u8 event) |
| 1483 | { |
| 1484 | struct sk_buff *skb; |
| 1485 | unsigned char *ptr; |
| 1486 | |
| 1487 | if ((skb = dev_alloc_skb(1)) == NULL) { |
| 1488 | printk(KERN_ERR "%s: out of memory\n", __FUNCTION__); |
| 1489 | return; |
| 1490 | } |
| 1491 | |
| 1492 | ptr = skb_put(skb, 1); |
| 1493 | *ptr = event; |
| 1494 | |
| 1495 | skb->protocol = x25_type_trans(skb, dev); |
| 1496 | netif_rx(skb); |
| 1497 | dev->last_rx = jiffies; /* timestamp */ |
| 1498 | } |
| 1499 | |
| 1500 | /* Convert line speed in bps to a number used by cyclom 2x code. */ |
| 1501 | static u8 bps_to_speed_code(u32 bps) |
| 1502 | { |
| 1503 | u8 number = 0; /* defaults to the lowest (1200) speed ;> */ |
| 1504 | |
| 1505 | if (bps >= 512000) number = 8; |
| 1506 | else if (bps >= 256000) number = 7; |
| 1507 | else if (bps >= 64000) number = 6; |
| 1508 | else if (bps >= 38400) number = 5; |
| 1509 | else if (bps >= 19200) number = 4; |
| 1510 | else if (bps >= 9600) number = 3; |
| 1511 | else if (bps >= 4800) number = 2; |
| 1512 | else if (bps >= 2400) number = 1; |
| 1513 | |
| 1514 | return number; |
| 1515 | } |
| 1516 | |
| 1517 | /* log base 2 */ |
| 1518 | static u8 cycx_log2(u32 n) |
| 1519 | { |
| 1520 | u8 log = 0; |
| 1521 | |
| 1522 | if (!n) |
| 1523 | return 0; |
| 1524 | |
| 1525 | while (n > 1) { |
| 1526 | n >>= 1; |
| 1527 | ++log; |
| 1528 | } |
| 1529 | |
| 1530 | return log; |
| 1531 | } |
| 1532 | |
| 1533 | /* Convert decimal string to unsigned integer. |
| 1534 | * If len != 0 then only 'len' characters of the string are converted. */ |
| 1535 | static unsigned dec_to_uint(u8 *str, int len) |
| 1536 | { |
| 1537 | unsigned val = 0; |
| 1538 | |
| 1539 | if (!len) |
| 1540 | len = strlen(str); |
| 1541 | |
Tobias Klauser | 8e18d1f | 2005-09-10 14:45:00 -0700 | [diff] [blame] | 1542 | for (; len && isdigit(*str); ++str, --len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1543 | val = (val * 10) + (*str - (unsigned) '0'); |
| 1544 | |
| 1545 | return val; |
| 1546 | } |
| 1547 | |
| 1548 | static void reset_timer(struct net_device *dev) |
| 1549 | { |
| 1550 | struct cycx_x25_channel *chan = dev->priv; |
| 1551 | |
| 1552 | if (chan->svc) |
| 1553 | mod_timer(&chan->timer, jiffies+chan->idle_tmout*HZ); |
| 1554 | } |
| 1555 | #ifdef CYCLOMX_X25_DEBUG |
| 1556 | static void cycx_x25_dump_config(struct cycx_x25_config *conf) |
| 1557 | { |
| 1558 | printk(KERN_INFO "X.25 configuration\n"); |
| 1559 | printk(KERN_INFO "-----------------\n"); |
| 1560 | printk(KERN_INFO "link number=%d\n", conf->link); |
| 1561 | printk(KERN_INFO "line speed=%d\n", conf->speed); |
| 1562 | printk(KERN_INFO "clock=%sternal\n", conf->clock == 8 ? "Ex" : "In"); |
| 1563 | printk(KERN_INFO "# level 2 retransm.=%d\n", conf->n2); |
| 1564 | printk(KERN_INFO "level 2 window=%d\n", conf->n2win); |
| 1565 | printk(KERN_INFO "level 3 window=%d\n", conf->n3win); |
| 1566 | printk(KERN_INFO "# logical channels=%d\n", conf->nvc); |
| 1567 | printk(KERN_INFO "level 3 pkt len=%d\n", conf->pktlen); |
| 1568 | printk(KERN_INFO "my address=%d\n", conf->locaddr); |
| 1569 | printk(KERN_INFO "remote address=%d\n", conf->remaddr); |
| 1570 | printk(KERN_INFO "t1=%d seconds\n", conf->t1); |
| 1571 | printk(KERN_INFO "t2=%d seconds\n", conf->t2); |
| 1572 | printk(KERN_INFO "t21=%d seconds\n", conf->t21); |
| 1573 | printk(KERN_INFO "# PVCs=%d\n", conf->npvc); |
| 1574 | printk(KERN_INFO "t23=%d seconds\n", conf->t23); |
| 1575 | printk(KERN_INFO "flags=0x%x\n", conf->flags); |
| 1576 | } |
| 1577 | |
| 1578 | static void cycx_x25_dump_stats(struct cycx_x25_stats *stats) |
| 1579 | { |
| 1580 | printk(KERN_INFO "X.25 statistics\n"); |
| 1581 | printk(KERN_INFO "--------------\n"); |
| 1582 | printk(KERN_INFO "rx_crc_errors=%d\n", stats->rx_crc_errors); |
| 1583 | printk(KERN_INFO "rx_over_errors=%d\n", stats->rx_over_errors); |
| 1584 | printk(KERN_INFO "n2_tx_frames=%d\n", stats->n2_tx_frames); |
| 1585 | printk(KERN_INFO "n2_rx_frames=%d\n", stats->n2_rx_frames); |
| 1586 | printk(KERN_INFO "tx_timeouts=%d\n", stats->tx_timeouts); |
| 1587 | printk(KERN_INFO "rx_timeouts=%d\n", stats->rx_timeouts); |
| 1588 | printk(KERN_INFO "n3_tx_packets=%d\n", stats->n3_tx_packets); |
| 1589 | printk(KERN_INFO "n3_rx_packets=%d\n", stats->n3_rx_packets); |
| 1590 | printk(KERN_INFO "tx_aborts=%d\n", stats->tx_aborts); |
| 1591 | printk(KERN_INFO "rx_aborts=%d\n", stats->rx_aborts); |
| 1592 | } |
| 1593 | |
| 1594 | static void cycx_x25_dump_devs(struct wan_device *wandev) |
| 1595 | { |
| 1596 | struct net_device *dev = wandev->dev; |
| 1597 | |
| 1598 | printk(KERN_INFO "X.25 dev states\n"); |
| 1599 | printk(KERN_INFO "name: addr: txoff: protocol:\n"); |
| 1600 | printk(KERN_INFO "---------------------------------------\n"); |
| 1601 | |
| 1602 | while(dev) { |
| 1603 | struct cycx_x25_channel *chan = dev->priv; |
| 1604 | |
| 1605 | printk(KERN_INFO "%-5.5s %-15.15s %d ETH_P_%s\n", |
| 1606 | chan->name, chan->addr, netif_queue_stopped(dev), |
| 1607 | chan->protocol == ETH_P_IP ? "IP" : "X25"); |
| 1608 | dev = chan->slave; |
| 1609 | } |
| 1610 | } |
| 1611 | |
| 1612 | #endif /* CYCLOMX_X25_DEBUG */ |
| 1613 | /* End */ |