drivers/net/net_init.c

   1 /* netdrv_init.c: Initialization for network devices. */
   2 /*
   3         Written 1993,1994,1995 by Donald Becker.
   4
   5         The author may be reached as becker@cesdis.gsfc.nasa.gov or
   6         C/O Center of Excellence in Space Data and Information Sciences
   7                 Code 930.5, Goddard Space Flight Center, Greenbelt MD 20771
   8
   9         This file contains the initialization for the "pl14+" style ethernet
  10         drivers.  It should eventually replace most of drivers/net/Space.c.
  11         It's primary advantage is that it's able to allocate low-memory buffers.
  12         A secondary advantage is that the dangerous NE*000 netcards can reserve
  13         their I/O port region before the SCSI probes start.
  14
  15         Modifications/additions by Bjorn Ekwall <bj0rn@blox.se>:
  16                 ethdev_index[MAX_ETH_CARDS]
  17                 register_netdev() / unregister_netdev()
  18
  19         Modifications by Wolfgang Walter
  20                 Use dev_close cleanly so we always shut things down tidily.
  21
  22         Changed 29/10/95, Alan Cox to pass sockaddr's around for mac addresses.
  23
  24         14/06/96 - Paul Gortmaker:      Add generic eth_change_mtu() function.
  25         24/09/96 - Paul Norton: Add token-ring variants of the netdev functions.
  26 */
  27
  28 #include <linux/config.h>
  29 #include <linux/kernel.h>
  30 #include <linux/sched.h>
  31 #include <linux/types.h>
  32 #include <linux/fs.h>
  33 #include <linux/malloc.h>
  34 #include <linux/if_ether.h>
  35 #include <linux/string.h>
  36 #include <linux/netdevice.h>
  37 #include <linux/etherdevice.h>
  38 #include <linux/fddidevice.h>
  39 #include <linux/hippidevice.h>
  40 #include <linux/trdevice.h>
  41 #include <linux/fcdevice.h>
  42 #include <linux/if_arp.h>
  43 #include <linux/if_ltalk.h>
  44 #include <linux/rtnetlink.h>
  45 #include <net/neighbour.h>
  46
  47 /* The network devices currently exist only in the socket namespace, so these
  48    entries are unused.  The only ones that make sense are
  49     open        start the ethercard
  50     close       stop  the ethercard
  51     ioctl       To get statistics, perhaps set the interface port (AUI, BNC, etc.)
  52    One can also imagine getting raw packets using
  53     read & write
  54    but this is probably better handled by a raw packet socket.
  55
  56    Given that almost all of these functions are handled in the current
  57    socket-based scheme, putting ethercard devices in /dev/ seems pointless.
  58
  59    [Removed all support for /dev network devices. When someone adds
  60     streams then by magic we get them, but otherwise they are un-needed
  61         and a space waste]
  62 */
  63
  64 /* The list of used and available "eth" slots (for "eth0", "eth1", etc.) */
  65 #define MAX_ETH_CARDS 16
  66 static struct net_device *ethdev_index[MAX_ETH_CARDS];
  67
  68
  69 /* Fill in the fields of the device structure with ethernet-generic values.
  70
  71    If no device structure is passed, a new one is constructed, complete with
  72    a SIZEOF_PRIVATE private data area.
  73
  74    If an empty string area is passed as dev->name, or a new structure is made,
  75    a new name string is constructed.  The passed string area should be 8 bytes
  76    long.
  77  */
  78
  79 struct net_device *
  80 init_etherdev(struct net_device *dev, int sizeof_priv)
  81 {
  82         int new_device = 0;
  83         int i;
  84
  85         /* Use an existing correctly named device in Space.c:dev_base. */
  86         if (dev == NULL) {
  87                 int alloc_size = sizeof(struct net_device) + IFNAMSIZ
  88                         + sizeof_priv + 3;
  89                 struct net_device *cur_dev;
  90                 char pname[8];          /* Putative name for the device.  */
  91
  92                 for (i = 0; i < MAX_ETH_CARDS; ++i)
  93                         if (ethdev_index[i] == NULL) {
  94                                 sprintf(pname, "eth%d", i);
  95                                 read_lock_bh(&dev_base_lock);
  96                                 for (cur_dev = dev_base; cur_dev; cur_dev = cur_dev->next) {
  97                                         if (strcmp(pname, cur_dev->name) == 0) {
  98                                                 dev = cur_dev;
  99                                                 read_unlock_bh(&dev_base_lock);
 100                                                 dev->init = NULL;
 101                                                 sizeof_priv = (sizeof_priv + 3) & ~3;
 102                                                 dev->priv = sizeof_priv
 103                                                           ? kmalloc(sizeof_priv, GFP_KERNEL)
 104                                                           :     NULL;
 105                                                 if (dev->priv) memset(dev->priv, 0, sizeof_priv);
 106                                                 goto found;
 107                                         }
 108                                 }
 109                                 read_unlock_bh(&dev_base_lock);
 110                         }
 111
 112                 alloc_size &= ~3;               /* Round to dword boundary. */
 113
 114                 dev = (struct net_device *)kmalloc(alloc_size, GFP_KERNEL);
 115                 if(dev==NULL)
 116                         return NULL;
 117                 memset(dev, 0, alloc_size);
 118                 if (sizeof_priv)
 119                         dev->priv = (void *) (dev + 1);
 120                 dev->name = sizeof_priv + (char *)(dev + 1);
 121                 new_device = 1;
 122         }
 123
 124 found:                                          /* From the double loop above. */
 125
 126         if (dev->name &&
 127                 ((dev->name[0] == '\0') || (dev->name[0] == ' '))) {
 128                 for (i = 0; i < MAX_ETH_CARDS; ++i)
 129                         if (ethdev_index[i] == NULL) {
 130                                 sprintf(dev->name, "eth%d", i);
 131                                 ethdev_index[i] = dev;
 132                                 break;
 133                         }
 134         }
 135
 136         ether_setup(dev);       /* Hmmm, should this be called here? */
 137
 138         if (new_device) {
 139                 rtnl_lock();
 140                 register_netdevice(dev);
 141                 rtnl_unlock();
 142         }
 143         return dev;
 144 }
 145
 146
 147 static int eth_mac_addr(struct net_device *dev, void *p)
 148 {
 149         struct sockaddr *addr=p;
 150         if(dev->start)
 151                 return -EBUSY;
 152         memcpy(dev->dev_addr, addr->sa_data,dev->addr_len);
 153         return 0;
 154 }
 155
 156 static int eth_change_mtu(struct net_device *dev, int new_mtu)
 157 {
 158         if ((new_mtu < 68) || (new_mtu > 1500))
 159                 return -EINVAL;
 160         dev->mtu = new_mtu;
 161         return 0;
 162 }
 163
 164 #ifdef CONFIG_FDDI
 165
 166 static int fddi_change_mtu(struct net_device *dev, int new_mtu)
 167 {
 168         if ((new_mtu < FDDI_K_SNAP_HLEN) || (new_mtu > FDDI_K_SNAP_DLEN))
 169                 return(-EINVAL);
 170         dev->mtu = new_mtu;
 171         return(0);
 172 }
 173
 174 #endif
 175
 176 #ifdef CONFIG_HIPPI
 177 #define MAX_HIP_CARDS   4
 178 static struct net_device *hipdev_index[MAX_HIP_CARDS];
 179
 180 static int hippi_change_mtu(struct net_device *dev, int new_mtu)
 181 {
 182         /*
 183          * HIPPI's got these nice large MTUs.
 184          */
 185         if ((new_mtu < 68) || (new_mtu > 65280))
 186                 return -EINVAL;
 187         dev->mtu = new_mtu;
 188         return(0);
 189 }
 190
 191
 192 /*
 193  * For HIPPI we will actually use the lower 4 bytes of the hardware
 194  * address as the I-FIELD rather than the actual hardware address.
 195  */
 196 static int hippi_mac_addr(struct net_device *dev, void *p)
 197 {
 198         struct sockaddr *addr = p;
 199         if(dev->start)
 200                 return -EBUSY;
 201         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
 202         return 0;
 203 }
 204
 205
 206 struct net_device *init_hippi_dev(struct net_device *dev, int sizeof_priv)
 207 {
 208         int new_device = 0;
 209         int i;
 210
 211         /* Use an existing correctly named device in Space.c:dev_base. */
 212         if (dev == NULL) {
 213                 int alloc_size = sizeof(struct net_device) + IFNAMSIZ
 214                         + sizeof_priv + 3;
 215                 struct net_device *cur_dev;
 216                 char pname[8];
 217
 218                 for (i = 0; i < MAX_HIP_CARDS; ++i)
 219                         if (hipdev_index[i] == NULL) {
 220                                 sprintf(pname, "hip%d", i);
 221                                 read_lock_bh(&dev_base_lock);
 222                                 for (cur_dev = dev_base; cur_dev; cur_dev = cur_dev->next) {
 223                                         if (strcmp(pname, cur_dev->name) == 0) {
 224                                                 dev = cur_dev;
 225                                                 read_unlock_bh(&dev_base_lock);
 226                                                 dev->init = NULL;
 227                                                 sizeof_priv = (sizeof_priv + 3) & ~3;
 228                                                 dev->priv = sizeof_priv
 229                                                           ? kmalloc(sizeof_priv, GFP_KERNEL)
 230                                                           :     NULL;
 231                                                 if (dev->priv) memset(dev->priv, 0, sizeof_priv);
 232                                                 goto hipfound;
 233                                         }
 234                                 }
 235                                 read_unlock_bh(&dev_base_lock);
 236                         }
 237
 238                 alloc_size &= ~3;               /* Round to dword boundary. */
 239
 240                 dev = (struct net_device *)kmalloc(alloc_size, GFP_KERNEL);
 241                 if(dev==NULL)
 242                         return NULL;
 243                 memset(dev, 0, alloc_size);
 244                 if (sizeof_priv)
 245                         dev->priv = (void *) (dev + 1);
 246                 dev->name = sizeof_priv + (char *)(dev + 1);
 247                 new_device = 1;
 248         }
 249
 250 hipfound:                               /* From the double loop above. */
 251
 252         if (dev->name &&
 253                 ((dev->name[0] == '\0') || (dev->name[0] == ' '))) {
 254                 for (i = 0; i < MAX_HIP_CARDS; ++i)
 255                         if (hipdev_index[i] == NULL) {
 256                                 sprintf(dev->name, "hip%d", i);
 257                                 hipdev_index[i] = dev;
 258                                 break;
 259                         }
 260         }
 261
 262         hippi_setup(dev);
 263
 264         if (new_device) {
 265                 rtnl_lock();
 266                 register_netdevice(dev);
 267                 rtnl_unlock();
 268         }
 269         return dev;
 270 }
 271
 272
 273 void unregister_hipdev(struct net_device *dev)
 274 {
 275         int i;
 276         rtnl_lock();
 277         unregister_netdevice(dev);
 278         for (i = 0; i < MAX_HIP_CARDS; ++i) {
 279                 if (hipdev_index[i] == dev) {
 280                         hipdev_index[i] = NULL;
 281                         break;
 282                 }
 283         }
 284         rtnl_unlock();
 285 }
 286
 287
 288 static int hippi_neigh_setup_dev(struct net_device *dev, struct neigh_parms *p)
 289 {
 290         /* Never send broadcast/multicast ARP messages */
 291         p->mcast_probes = 0;
 292
 293         /* In IPv6 unicast probes are valid even on NBMA,
 294         * because they are encapsulated in normal IPv6 protocol.
 295         * Should be a generic flag.
 296         */
 297         if (p->tbl->family != AF_INET6)
 298                 p->ucast_probes = 0;
 299         return 0;
 300 }
 301
 302 #endif
 303
 304 void ether_setup(struct net_device *dev)
 305 {
 306         int i;
 307         /* Fill in the fields of the device structure with ethernet-generic values.
 308            This should be in a common file instead of per-driver.  */
 309
 310         /* register boot-defined "eth" devices */
 311         if (dev->name && (strncmp(dev->name, "eth", 3) == 0)) {
 312                 i = simple_strtoul(dev->name + 3, NULL, 0);
 313                 if (ethdev_index[i] == NULL) {
 314                         ethdev_index[i] = dev;
 315                 }
 316                 else if (dev != ethdev_index[i]) {
 317                         /* Really shouldn't happen! */
 318                         printk("ether_setup: Ouch! Someone else took %s\n",
 319                                 dev->name);
 320                 }
 321         }
 322
 323         dev->change_mtu         = eth_change_mtu;
 324         dev->hard_header        = eth_header;
 325         dev->rebuild_header     = eth_rebuild_header;
 326         dev->set_mac_address    = eth_mac_addr;
 327         dev->hard_header_cache  = eth_header_cache;
 328         dev->header_cache_update= eth_header_cache_update;
 329         dev->hard_header_parse  = eth_header_parse;
 330
 331         dev->type               = ARPHRD_ETHER;
 332         dev->hard_header_len    = ETH_HLEN;
 333         dev->mtu                = 1500; /* eth_mtu */
 334         dev->addr_len           = ETH_ALEN;
 335         dev->tx_queue_len       = 100;  /* Ethernet wants good queues */
 336
 337         memset(dev->broadcast,0xFF, ETH_ALEN);
 338
 339         /* New-style flags. */
 340         dev->flags              = IFF_BROADCAST|IFF_MULTICAST;
 341
 342         dev_init_buffers(dev);
 343 }
 344
 345 #ifdef CONFIG_FDDI
 346
 347 void fddi_setup(struct net_device *dev)
 348 {
 349         /*
 350          * Fill in the fields of the device structure with FDDI-generic values.
 351          * This should be in a common file instead of per-driver.
 352          */
 353
 354         dev->change_mtu                 = fddi_change_mtu;
 355         dev->hard_header                = fddi_header;
 356         dev->rebuild_header             = fddi_rebuild_header;
 357
 358         dev->type                               = ARPHRD_FDDI;
 359         dev->hard_header_len    = FDDI_K_SNAP_HLEN+3;   /* Assume 802.2 SNAP hdr len + 3 pad bytes */
 360         dev->mtu                                = FDDI_K_SNAP_DLEN;             /* Assume max payload of 802.2 SNAP frame */
 361         dev->addr_len                   = FDDI_K_ALEN;
 362         dev->tx_queue_len               = 100;  /* Long queues on FDDI */
 363
 364         memset(dev->broadcast, 0xFF, FDDI_K_ALEN);
 365
 366         /* New-style flags */
 367         dev->flags              = IFF_BROADCAST | IFF_MULTICAST;
 368
 369         dev_init_buffers(dev);
 370
 371         return;
 372 }
 373
 374 #endif
 375
 376 #ifdef CONFIG_HIPPI
 377 void hippi_setup(struct net_device *dev)
 378 {
 379         int i;
 380
 381         if (dev->name && (strncmp(dev->name, "hip", 3) == 0)) {
 382                 i = simple_strtoul(dev->name + 3, NULL, 0);
 383                 if (hipdev_index[i] == NULL) {
 384                         hipdev_index[i] = dev;
 385                 }
 386                 else if (dev != hipdev_index[i]) {
 387                         printk("hippi_setup: Ouch! Someone else took %s\n",
 388                                 dev->name);
 389                 }
 390         }
 391
 392         dev->set_multicast_list = NULL;
 393         dev->change_mtu                 = hippi_change_mtu;
 394         dev->hard_header                = hippi_header;
 395         dev->rebuild_header             = hippi_rebuild_header;
 396         dev->set_mac_address            = hippi_mac_addr;
 397         dev->hard_header_parse          = NULL;
 398         dev->hard_header_cache          = NULL;
 399         dev->header_cache_update        = NULL;
 400         dev->neigh_setup                = hippi_neigh_setup_dev;
 401
 402         /*
 403          * We don't support HIPPI `ARP' for the time being, and probably
 404          * never will unless someone else implements it. However we
 405          * still need a fake ARPHRD to make ifconfig and friends play ball.
 406          */
 407         dev->type               = ARPHRD_HIPPI;
 408         dev->hard_header_len    = HIPPI_HLEN;
 409         dev->mtu                = 65280;
 410         dev->addr_len           = HIPPI_ALEN;
 411         dev->tx_queue_len       = 25 /* 5 */;
 412         memset(dev->broadcast, 0xFF, HIPPI_ALEN);
 413
 414
 415         /*
 416          * HIPPI doesn't support broadcast+multicast and we only use
 417          * static ARP tables. ARP is disabled by hippi_neigh_setup_dev.
 418          */
 419         dev->flags = 0;
 420
 421         dev_init_buffers(dev);
 422 }
 423 #endif
 424
 425 #if defined(CONFIG_ATALK) || defined(CONFIG_ATALK_MODULE)
 426
 427 static int ltalk_change_mtu(struct net_device *dev, int mtu)
 428 {
 429         return -EINVAL;
 430 }
 431
 432 static int ltalk_mac_addr(struct net_device *dev, void *addr)
 433 {
 434         return -EINVAL;
 435 }
 436
 437
 438 void ltalk_setup(struct net_device *dev)
 439 {
 440         /* Fill in the fields of the device structure with localtalk-generic values. */
 441
 442         dev->change_mtu         = ltalk_change_mtu;
 443         dev->hard_header        = NULL;
 444         dev->rebuild_header     = NULL;
 445         dev->set_mac_address    = ltalk_mac_addr;
 446         dev->hard_header_cache  = NULL;
 447         dev->header_cache_update= NULL;
 448
 449         dev->type               = ARPHRD_LOCALTLK;
 450         dev->hard_header_len    = LTALK_HLEN;
 451         dev->mtu                = LTALK_MTU;
 452         dev->addr_len           = LTALK_ALEN;
 453         dev->tx_queue_len       = 10;
 454
 455         dev->broadcast[0]       = 0xFF;
 456
 457         dev->flags              = IFF_BROADCAST|IFF_MULTICAST|IFF_NOARP;
 458
 459         dev_init_buffers(dev);
 460 }
 461
 462 #endif
 463
 464 int ether_config(struct net_device *dev, struct ifmap *map)
 465 {
 466         if (map->mem_start != (u_long)(-1))
 467                 dev->mem_start = map->mem_start;
 468         if (map->mem_end != (u_long)(-1))
 469                 dev->mem_end = map->mem_end;
 470         if (map->base_addr != (u_short)(-1))
 471                 dev->base_addr = map->base_addr;
 472         if (map->irq != (u_char)(-1))
 473                 dev->irq = map->irq;
 474         if (map->dma != (u_char)(-1))
 475                 dev->dma = map->dma;
 476         if (map->port != (u_char)(-1))
 477                 dev->if_port = map->port;
 478         return 0;
 479 }
 480
 481 static int etherdev_get_index(struct net_device *dev)
 482 {
 483         int i=MAX_ETH_CARDS;
 484
 485         for (i = 0; i < MAX_ETH_CARDS; ++i)     {
 486                 if (ethdev_index[i] == NULL) {
 487                         sprintf(dev->name, "eth%d", i);
 488 /*                      printk("loading device '%s'...\n", dev->name);*/
 489                         ethdev_index[i] = dev;
 490                         return i;
 491                 }
 492         }
 493         return -1;
 494 }
 495
 496 static void etherdev_put_index(struct net_device *dev)
 497 {
 498         int i;
 499         for (i = 0; i < MAX_ETH_CARDS; ++i) {
 500                 if (ethdev_index[i] == dev) {
 501                         ethdev_index[i] = NULL;
 502                         break;
 503                 }
 504         }
 505 }
 506
 507 int register_netdev(struct net_device *dev)
 508 {
 509         int i=-1;
 510
 511         rtnl_lock();
 512
 513         if (dev->name &&
 514             (dev->name[0] == '\0' || dev->name[0] == ' '))
 515                 i = etherdev_get_index(dev);
 516
 517         if (register_netdevice(dev)) {
 518                 if (i >= 0)
 519                         etherdev_put_index(dev);
 520                 rtnl_unlock();
 521                 return -EIO;
 522         }
 523         rtnl_unlock();
 524         return 0;
 525 }
 526
 527 void unregister_netdev(struct net_device *dev)
 528 {
 529         rtnl_lock();
 530         unregister_netdevice(dev);
 531         etherdev_put_index(dev);
 532         rtnl_unlock();
 533 }
 534
 535
 536 #ifdef CONFIG_TR
 537 /* The list of used and available "tr" slots */
 538 #define MAX_TR_CARDS 16
 539 static struct net_device *trdev_index[MAX_TR_CARDS];
 540
 541 struct net_device *init_trdev(struct net_device *dev, int sizeof_priv)
 542 {
 543         int new_device = 0;
 544         int i;
 545
 546         /* Use an existing correctly named device in Space.c:dev_base. */
 547         if (dev == NULL) {
 548                 int alloc_size = sizeof(struct net_device) + IFNAMSIZ
 549                         + sizeof_priv + 3;
 550                 struct net_device *cur_dev;
 551                 char pname[8];          /* Putative name for the device.  */
 552
 553                 for (i = 0; i < MAX_TR_CARDS; ++i)
 554                         if (trdev_index[i] == NULL) {
 555                                 sprintf(pname, "tr%d", i);
 556                                 read_lock_bh(&dev_base_lock);
 557                                 for (cur_dev = dev_base; cur_dev; cur_dev = cur_dev->next) {
 558                                         if (strcmp(pname, cur_dev->name) == 0) {
 559                                                 dev = cur_dev;
 560                                                 read_unlock_bh(&dev_base_lock);
 561                                                 dev->init = NULL;
 562                                                 sizeof_priv = (sizeof_priv + 3) & ~3;
 563                                                 dev->priv = sizeof_priv
 564                                                           ? kmalloc(sizeof_priv, GFP_KERNEL)
 565                                                           :     NULL;
 566                                                 if (dev->priv) memset(dev->priv, 0, sizeof_priv);
 567                                                 goto trfound;
 568                                         }
 569                                 }
 570                                 read_unlock_bh(&dev_base_lock);
 571                         }
 572
 573                 alloc_size &= ~3;               /* Round to dword boundary. */
 574                 dev = (struct net_device *)kmalloc(alloc_size, GFP_KERNEL);
 575                 if(dev==NULL)
 576                         return NULL;
 577                 memset(dev, 0, alloc_size);
 578                 if (sizeof_priv)
 579                         dev->priv = (void *) (dev + 1);
 580                 dev->name = sizeof_priv + (char *)(dev + 1);
 581                 new_device = 1;
 582         }
 583
 584 trfound:                                                /* From the double loop above. */
 585
 586         for (i = 0; i < MAX_TR_CARDS; ++i)
 587                 if (trdev_index[i] == NULL) {
 588                         sprintf(dev->name, "tr%d", i);
 589                         trdev_index[i] = dev;
 590                         break;
 591                 }
 592
 593
 594         dev->hard_header         = tr_header;
 595         dev->rebuild_header  = tr_rebuild_header;
 596
 597         dev->type                    = ARPHRD_IEEE802;
 598         dev->hard_header_len = TR_HLEN;
 599         dev->mtu                     = 2000; /* bug in fragmenter...*/
 600         dev->addr_len            = TR_ALEN;
 601         dev->tx_queue_len        = 100; /* Long queues on tr */
 602
 603         memset(dev->broadcast,0xFF, TR_ALEN);
 604
 605         /* New-style flags. */
 606         dev->flags              = IFF_BROADCAST;
 607
 608         if (new_device) {
 609                 rtnl_lock();
 610                 register_netdevice(dev);
 611                 rtnl_unlock();
 612         }
 613         return dev;
 614 }
 615
 616 void tr_setup(struct net_device *dev)
 617 {
 618         int i;
 619
 620         /* register boot-defined "tr" devices */
 621         if (dev->name && (strncmp(dev->name, "tr", 2) == 0)) {
 622                 i = simple_strtoul(dev->name + 2, NULL, 0);
 623                 if (trdev_index[i] == NULL) {
 624                         trdev_index[i] = dev;
 625                 }
 626                 else if (dev != trdev_index[i]) {
 627                         /* Really shouldn't happen! */
 628                         printk("tr_setup: Ouch! Someone else took %s\n",
 629                                 dev->name);
 630                 }
 631         }
 632 }
 633
 634 void tr_freedev(struct net_device *dev)
 635 {
 636         int i;
 637         for (i = 0; i < MAX_TR_CARDS; ++i)
 638         {
 639                 if (trdev_index[i] == dev)
 640                 {
 641                         trdev_index[i] = NULL;
 642                         break;
 643                 }
 644         }
 645 }
 646
 647 int register_trdev(struct net_device *dev)
 648 {
 649         dev_init_buffers(dev);
 650
 651         if (dev->init && dev->init(dev) != 0) {
 652                 unregister_trdev(dev);
 653                 return -EIO;
 654         }
 655         return 0;
 656 }
 657
 658 void unregister_trdev(struct net_device *dev)
 659 {
 660         rtnl_lock();
 661         unregister_netdevice(dev);
 662         rtnl_unlock();
 663         tr_freedev(dev);
 664 }
 665 #endif
 666
 667
 668 #ifdef CONFIG_NET_FC
 669
 670 #define MAX_FC_CARDS 2
 671 static struct net_device *fcdev_index[MAX_FC_CARDS];
 672
 673 void fc_setup(struct net_device *dev)
 674 {
 675 int i;
 676
 677         /* register boot-defined "fc" devices */
 678         if (dev->name && (strncmp(dev->name, "fc", 2) == 0)) {
 679                 i = simple_strtoul(dev->name + 2, NULL, 0);
 680                 if (fcdev_index[i] == NULL) {
 681                         fcdev_index[i] = dev;
 682                 }
 683                 else if (dev != fcdev_index[i]) {
 684                         /* Really shouldn't happen! */
 685                         printk("fc_setup: Ouch! Someone else took %s\n",
 686                                 dev->name);
 687                 }
 688         }
 689
 690         dev->hard_header        =        fc_header;
 691         dev->rebuild_header     =        fc_rebuild_header;
 692
 693         dev->type               =        ARPHRD_IEEE802;
 694         dev->hard_header_len    =        FC_HLEN;
 695         dev->mtu                =        2024;
 696         dev->addr_len           =        FC_ALEN;
 697         dev->tx_queue_len       =        100; /* Long queues on fc */
 698
 699         memset(dev->broadcast,0xFF, FC_ALEN);
 700
 701         /* New-style flags. */
 702         dev->flags              =        IFF_BROADCAST;
 703                 dev_init_buffers(dev);
 704         return;
 705 }
 706
 707
 708 struct net_device *init_fcdev(struct net_device *dev, int sizeof_priv)
 709 {
 710 int new_device = 0;
 711 int i;
 712         /* Use an existing correctly named device in Space.c:dev_base. */
 713      if (dev == NULL) {
 714      int alloc_size = sizeof(struct net_device) + sizeof("fc%d  ") + sizeof_priv + 3;
 715      struct net_device *cur_dev;
 716      char pname[8];          /* Putative name for the device.  */
 717
 718         for (i = 0; i < MAX_FC_CARDS; ++i)
 719                 if (fcdev_index[i] == NULL) {
 720                 sprintf(pname, "fc%d", i);
 721                 for (cur_dev = dev_base; cur_dev; cur_dev = cur_dev->next)
 722                         if (strcmp(pname, cur_dev->name) == 0) {
 723                         dev = cur_dev;
 724                         dev->init = NULL;
 725                         sizeof_priv = (sizeof_priv + 3) &~3;
 726                         dev->priv = sizeof_priv
 727                                                                 ? kmalloc(sizeof_priv, GFP_KERNEL)
 728                                 : NULL;
 729                         if (dev->priv) memset(dev->priv, 0, sizeof_priv);
 730                         goto fcfound;
 731                      }
 732                }
 733
 734         alloc_size &= ~3;               /* Round to dword boundary. */
 735         dev = (struct net_device *)kmalloc(alloc_size, GFP_KERNEL);
 736                 memset(dev, 0, alloc_size);
 737         if (sizeof_priv)
 738                 dev->priv = (void *) (dev + 1);
 739         dev->name = sizeof_priv + (char *)(dev + 1);
 740         new_device = 1;
 741       }
 742
 743 fcfound:                       /* From the double loop */
 744
 745         for (i = 0; i < MAX_FC_CARDS; ++i)
 746                 if (fcdev_index[i] == NULL) {
 747                         sprintf(dev->name, "fc%d", i);
 748                         fcdev_index[i] = dev;
 749                         break;
 750                 }
 751
 752         fc_setup(dev);
 753         if (new_device) {
 754                 rtnl_lock();
 755                 register_netdevice(dev);
 756                 rtnl_unlock();
 757         }
 758         return dev;
 759 }
 760
 761 void fc_freedev(struct net_device *dev)
 762 {
 763 int i;
 764         for (i = 0; i < MAX_FC_CARDS; ++i) {
 765                 if (fcdev_index[i] == dev) {
 766                         fcdev_index[i] = NULL;
 767                         break;
 768                 }
 769         }
 770 }
 771
 772
 773 int register_fcdev(struct net_device *dev)
 774 {
 775         dev_init_buffers(dev);
 776         if (dev->init && dev->init(dev) != 0) {
 777                 unregister_fcdev(dev);
 778                 return -EIO;
 779         }
 780         return 0;
 781 }
 782
 783 void unregister_fcdev(struct net_device *dev)
 784 {
 785         rtnl_lock();
 786         unregister_netdevice(dev);
 787         rtnl_unlock();
 788         fc_freedev(dev);
 789 }
 790
 791 #endif /* CONFIG_NET_FC */
 792
 793 /*
 794  * Local variables:
 795  *  compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -m486 -c net_init.c"
 796  *  version-control: t
 797  *  kept-new-versions: 5
 798  * End:
 799  */