drivers/s390/net/lcs.c

   1 /*
   2  *  linux/drivers/s390/net/lcs.c
   3  *
   4  *  Linux for S/390 Lan Channel Station Network Driver
   5  *
   6  *  Copyright (C)  1999-2001 IBM Deutschland Entwicklung GmbH,
   7  *                           IBM Corporation
   8  *    Author(s): Original Code written by
   9  *                        DJ Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com)
  10  *               Rewritten by
  11  *                        Frank Pavlic (pavlic@de.ibm.com) and
  12  *                        Martin Schwidefsky <schwidefsky@de.ibm.com>
  13  *
  14  *    $Revision: 1.74 $  $Date: 2004/04/05 00:01:04 $
  15  *
  16  * This program is free software; you can redistribute it and/or modify
  17  * it under the terms of the GNU General Public License as published by
  18  * the Free Software Foundation; either version 2, or (at your option)
  19  * any later version.
  20  *
  21  * This program is distributed in the hope that it will be useful,
  22  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  23  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24  * GNU General Public License for more details.
  25  *
  26  * You should have received a copy of the GNU General Public License
  27  * along with this program; if not, write to the Free Software
  28  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  29  */
  30
  31 #include <linux/module.h>
  32 #include <linux/if.h>
  33 #include <linux/netdevice.h>
  34 #include <linux/etherdevice.h>
  35 #include <linux/trdevice.h>
  36 #include <linux/fddidevice.h>
  37 #include <linux/inetdevice.h>
  38 #include <linux/in.h>
  39 #include <linux/igmp.h>
  40 #include <net/arp.h>
  41 #include <net/ip.h>
  42
  43 #include <asm/debug.h>
  44 #include <asm/idals.h>
  45 #include <asm/timex.h>
  46 #include <linux/device.h>
  47 #include <asm/ccwgroup.h>
  48
  49 #include "lcs.h"
  50 #include "cu3088.h"
  51
  52
  53 #if !defined(CONFIG_NET_ETHERNET) && \
  54     !defined(CONFIG_TR) && !defined(CONFIG_FDDI)
  55 #error Cannot compile lcs.c without some net devices switched on.
  56 #endif
  57
  58 /**
  59  * initialization string for output
  60  */
  61 #define VERSION_LCS_C  "$Revision: 1.74 $"
  62
  63 static char version[] __initdata = "LCS driver ("VERSION_LCS_C "/" VERSION_LCS_H ")";
  64 static char debug_buffer[255];
  65
  66 /**
  67  * Some prototypes.
  68  */
  69 static void lcs_tasklet(unsigned long);
  70 static void lcs_start_kernel_thread(struct lcs_card *card);
  71 static void lcs_get_frames_cb(struct lcs_channel *, struct lcs_buffer *);
  72
  73 /**
  74  * Debug Facility Stuff
  75  */
  76 static debug_info_t *lcs_dbf_setup;
  77 static debug_info_t *lcs_dbf_trace;
  78
  79 /**
  80  *  LCS Debug Facility functions
  81  */
  82 static void
  83 lcs_unregister_debug_facility(void)
  84 {
  85         if (lcs_dbf_setup)
  86                 debug_unregister(lcs_dbf_setup);
  87         if (lcs_dbf_trace)
  88                 debug_unregister(lcs_dbf_trace);
  89 }
  90
  91 static int
  92 lcs_register_debug_facility(void)
  93 {
  94         lcs_dbf_setup = debug_register("lcs_setup", 1, 1, 8);
  95         lcs_dbf_trace = debug_register("lcs_trace", 1, 2, 8);
  96         if (lcs_dbf_setup == NULL || lcs_dbf_trace == NULL) {
  97                 PRINT_ERR("Not enough memory for debug facility.\n");
  98                 lcs_unregister_debug_facility();
  99                 return -ENOMEM;
 100         }
 101         debug_register_view(lcs_dbf_setup, &debug_hex_ascii_view);
 102         debug_set_level(lcs_dbf_setup, 5);
 103         debug_register_view(lcs_dbf_trace, &debug_hex_ascii_view);
 104         debug_set_level(lcs_dbf_trace, 5);
 105         return 0;
 106 }
 107
 108 /**
 109  * Allocate io buffers.
 110  */
 111 static int
 112 lcs_alloc_channel(struct lcs_channel *channel)
 113 {
 114         int cnt;
 115
 116         LCS_DBF_TEXT(2, setup, "ichalloc");
 117         for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) {
 118                 /* alloc memory fo iobuffer */
 119                 channel->iob[cnt].data = (void *)
 120                         kmalloc(LCS_IOBUFFERSIZE, GFP_DMA | GFP_KERNEL);
 121                 if (channel->iob[cnt].data == NULL)
 122                         break;
 123                 memset(channel->iob[cnt].data, 0, LCS_IOBUFFERSIZE);
 124                 channel->iob[cnt].state = BUF_STATE_EMPTY;
 125         }
 126         if (cnt < LCS_NUM_BUFFS) {
 127                 /* Not all io buffers could be allocated. */
 128                 LCS_DBF_TEXT(2, setup, "echalloc");
 129                 while (cnt-- > 0)
 130                         kfree(channel->iob[cnt].data);
 131                 return -ENOMEM;
 132         }
 133         return 0;
 134 }
 135
 136 /**
 137  * Free io buffers.
 138  */
 139 static void
 140 lcs_free_channel(struct lcs_channel *channel)
 141 {
 142         int cnt;
 143
 144         LCS_DBF_TEXT(2, setup, "ichfree");
 145         for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) {
 146                 if (channel->iob[cnt].data != NULL)
 147                         kfree(channel->iob[cnt].data);
 148                 channel->iob[cnt].data = NULL;
 149         }
 150 }
 151
 152 /*
 153  * Cleanup channel.
 154  */
 155 static void
 156 lcs_cleanup_channel(struct lcs_channel *channel)
 157 {
 158         LCS_DBF_TEXT(3, setup, "cleanch");
 159         /* Kill write channel tasklets. */
 160         tasklet_kill(&channel->irq_tasklet);
 161         /* Free channel buffers. */
 162         lcs_free_channel(channel);
 163 }
 164
 165 /**
 166  * LCS free memory for card and channels.
 167  */
 168 static void
 169 lcs_free_card(struct lcs_card *card)
 170 {
 171         LCS_DBF_TEXT(2, setup, "remcard");
 172         LCS_DBF_HEX(2, setup, &card, sizeof(void*));
 173         kfree(card);
 174 }
 175
 176 /**
 177  * LCS alloc memory for card and channels
 178  */
 179 static struct lcs_card *
 180 lcs_alloc_card(void)
 181 {
 182         struct lcs_card *card;
 183         int rc;
 184
 185         LCS_DBF_TEXT(2, setup, "alloclcs");
 186
 187         card = kmalloc(sizeof(struct lcs_card), GFP_KERNEL | GFP_DMA);
 188         if (card == NULL)
 189                 return NULL;
 190         memset(card, 0, sizeof(struct lcs_card));
 191         card->lan_type = LCS_FRAME_TYPE_AUTO;
 192         card->lancmd_timeout = LCS_LANCMD_TIMEOUT_DEFAULT;
 193         /* Allocate io buffers for the read channel. */
 194         rc = lcs_alloc_channel(&card->read);
 195         if (rc){
 196                 LCS_DBF_TEXT(2, setup, "iccwerr");
 197                 lcs_free_card(card);
 198                 return NULL;
 199         }
 200         /* Allocate io buffers for the write channel. */
 201         rc = lcs_alloc_channel(&card->write);
 202         if (rc) {
 203                 LCS_DBF_TEXT(2, setup, "iccwerr");
 204                 lcs_cleanup_channel(&card->read);
 205                 lcs_free_card(card);
 206                 return NULL;
 207         }
 208
 209 #ifdef CONFIG_IP_MULTICAST
 210         INIT_LIST_HEAD(&card->ipm_list);
 211 #endif
 212         LCS_DBF_HEX(2, setup, &card, sizeof(void*));
 213         return card;
 214 }
 215
 216 /*
 217  * Setup read channel.
 218  */
 219 static void
 220 lcs_setup_read_ccws(struct lcs_card *card)
 221 {
 222         int cnt;
 223
 224         LCS_DBF_TEXT(2, setup, "ireadccw");
 225         /* Setup read ccws. */
 226         memset(card->read.ccws, 0, sizeof (struct ccw1) * (LCS_NUM_BUFFS + 1));
 227         for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) {
 228                 card->read.ccws[cnt].cmd_code = LCS_CCW_READ;
 229                 card->read.ccws[cnt].count = LCS_IOBUFFERSIZE;
 230                 card->read.ccws[cnt].flags =
 231                         CCW_FLAG_CC | CCW_FLAG_SLI | CCW_FLAG_PCI;
 232                 /*
 233                  * Note: we have allocated the buffer with GFP_DMA, so
 234                  * we do not need to do set_normalized_cda.
 235                  */
 236                 card->read.ccws[cnt].cda =
 237                         (__u32) __pa(card->read.iob[cnt].data);
 238                 ((struct lcs_header *)
 239                  card->read.iob[cnt].data)->offset = LCS_ILLEGAL_OFFSET;
 240                 card->read.iob[cnt].callback = lcs_get_frames_cb;
 241                 card->read.iob[cnt].state = BUF_STATE_READY;
 242                 card->read.iob[cnt].count = LCS_IOBUFFERSIZE;
 243         }
 244         card->read.ccws[0].flags &= ~CCW_FLAG_PCI;
 245         card->read.ccws[LCS_NUM_BUFFS - 1].flags &= ~CCW_FLAG_PCI;
 246         card->read.ccws[LCS_NUM_BUFFS - 1].flags |= CCW_FLAG_SUSPEND;
 247         /* Last ccw is a tic (transfer in channel). */
 248         card->read.ccws[LCS_NUM_BUFFS].cmd_code = LCS_CCW_TRANSFER;
 249         card->read.ccws[LCS_NUM_BUFFS].cda =
 250                 (__u32) __pa(card->read.ccws);
 251         /* Setg initial state of the read channel. */
 252         card->read.state = CH_STATE_INIT;
 253
 254         card->read.io_idx = 0;
 255         card->read.buf_idx = 0;
 256 }
 257
 258 static void
 259 lcs_setup_read(struct lcs_card *card)
 260 {
 261         LCS_DBF_TEXT(3, setup, "initread");
 262
 263         lcs_setup_read_ccws(card);
 264         /* Initialize read channel tasklet. */
 265         card->read.irq_tasklet.data = (unsigned long) &card->read;
 266         card->read.irq_tasklet.func = lcs_tasklet;
 267         /* Initialize waitqueue. */
 268         init_waitqueue_head(&card->read.wait_q);
 269 }
 270
 271 /*
 272  * Setup write channel.
 273  */
 274 static void
 275 lcs_setup_write_ccws(struct lcs_card *card)
 276 {
 277         int cnt;
 278
 279         LCS_DBF_TEXT(3, setup, "iwritccw");
 280         /* Setup write ccws. */
 281         memset(card->write.ccws, 0, sizeof(struct ccw1) * LCS_NUM_BUFFS + 1);
 282         for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) {
 283                 card->write.ccws[cnt].cmd_code = LCS_CCW_WRITE;
 284                 card->write.ccws[cnt].count = 0;
 285                 card->write.ccws[cnt].flags =
 286                         CCW_FLAG_SUSPEND | CCW_FLAG_CC | CCW_FLAG_SLI;
 287                 /*
 288                  * Note: we have allocated the buffer with GFP_DMA, so
 289                  * we do not need to do set_normalized_cda.
 290                  */
 291                 card->write.ccws[cnt].cda =
 292                         (__u32) __pa(card->write.iob[cnt].data);
 293         }
 294         /* Last ccw is a tic (transfer in channel). */
 295         card->write.ccws[LCS_NUM_BUFFS].cmd_code = LCS_CCW_TRANSFER;
 296         card->write.ccws[LCS_NUM_BUFFS].cda =
 297                 (__u32) __pa(card->write.ccws);
 298         /* Set initial state of the write channel. */
 299         card->read.state = CH_STATE_INIT;
 300
 301         card->write.io_idx = 0;
 302         card->write.buf_idx = 0;
 303 }
 304
 305 static void
 306 lcs_setup_write(struct lcs_card *card)
 307 {
 308         LCS_DBF_TEXT(3, setup, "initwrit");
 309
 310         lcs_setup_write_ccws(card);
 311         /* Initialize write channel tasklet. */
 312         card->write.irq_tasklet.data = (unsigned long) &card->write;
 313         card->write.irq_tasklet.func = lcs_tasklet;
 314         /* Initialize waitqueue. */
 315         init_waitqueue_head(&card->write.wait_q);
 316 }
 317
 318
 319
 320 /**
 321  * Initialize channels,card and state machines.
 322  */
 323 static void
 324 lcs_setup_card(struct lcs_card *card)
 325 {
 326         LCS_DBF_TEXT(2, setup, "initcard");
 327         LCS_DBF_HEX(2, setup, &card, sizeof(void*));
 328
 329         lcs_setup_read(card);
 330         lcs_setup_write(card);
 331         /* Set cards initial state. */
 332         card->state = DEV_STATE_DOWN;
 333         card->tx_buffer = NULL;
 334         card->tx_emitted = 0;
 335
 336         /* Initialize kernel thread task used for LGW commands. */
 337         INIT_WORK(&card->kernel_thread_starter,
 338                   (void *)lcs_start_kernel_thread,card);
 339         card->thread_mask = 0;
 340         spin_lock_init(&card->lock);
 341 #ifdef CONFIG_IP_MULTICAST
 342         INIT_LIST_HEAD(&card->ipm_list);
 343 #endif
 344         INIT_LIST_HEAD(&card->lancmd_waiters);
 345 }
 346
 347 /**
 348  * Cleanup channels,card and state machines.
 349  */
 350 static void
 351 lcs_cleanup_card(struct lcs_card *card)
 352 {
 353         struct list_head *l, *n;
 354         struct lcs_ipm_list *ipm_list;
 355
 356         LCS_DBF_TEXT(3, setup, "cleancrd");
 357         LCS_DBF_HEX(2,setup,&card,sizeof(void*));
 358 #ifdef  CONFIG_IP_MULTICAST
 359         /* Free multicast list. */
 360         list_for_each_safe(l, n, &card->ipm_list) {
 361                 ipm_list = list_entry(l, struct lcs_ipm_list, list);
 362                 list_del(&ipm_list->list);
 363                 kfree(ipm_list);
 364         }
 365 #endif
 366         if (card->dev != NULL)
 367                 free_netdev(card->dev);
 368         /* Cleanup channels. */
 369         lcs_cleanup_channel(&card->write);
 370         lcs_cleanup_channel(&card->read);
 371 }
 372
 373 /**
 374  * Start channel.
 375  */
 376 static int
 377 lcs_start_channel(struct lcs_channel *channel)
 378 {
 379         unsigned long flags;
 380         int rc;
 381
 382         LCS_DBF_TEXT_(4,trace,"ssch%s", channel->ccwdev->dev.bus_id);
 383         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
 384         rc = ccw_device_start(channel->ccwdev,
 385                               channel->ccws + channel->io_idx, 0, 0,
 386                               DOIO_DENY_PREFETCH | DOIO_ALLOW_SUSPEND);
 387         if (rc == 0)
 388                 channel->state = CH_STATE_RUNNING;
 389         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
 390         if (rc) {
 391                 LCS_DBF_TEXT_(4,trace,"essh%s", channel->ccwdev->dev.bus_id);
 392                 PRINT_ERR("Error in starting channel, rc=%d!\n", rc);
 393         }
 394         return rc;
 395 }
 396
 397 static int
 398 lcs_clear_channel(struct lcs_channel *channel)
 399 {
 400         unsigned long flags;
 401         int rc;
 402
 403         LCS_DBF_TEXT(4,trace,"clearch");
 404         LCS_DBF_TEXT_(4,trace,"%s", channel->ccwdev->dev.bus_id);
 405         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
 406         rc = ccw_device_clear(channel->ccwdev, (addr_t) channel);
 407         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
 408         if (rc) {
 409                 LCS_DBF_TEXT_(4,trace,"ecsc%s", channel->ccwdev->dev.bus_id);
 410                 return rc;
 411         }
 412         wait_event(channel->wait_q, (channel->state == CH_STATE_CLEARED));
 413         channel->state = CH_STATE_STOPPED;
 414         return rc;
 415 }
 416
 417
 418 /**
 419  * Stop channel.
 420  */
 421 static int
 422 lcs_stop_channel(struct lcs_channel *channel)
 423 {
 424         unsigned long flags;
 425         int rc;
 426
 427         if (channel->state == CH_STATE_STOPPED)
 428                 return 0;
 429         LCS_DBF_TEXT(4,trace,"haltsch");
 430         LCS_DBF_TEXT_(4,trace,"%s", channel->ccwdev->dev.bus_id);
 431         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
 432         rc = ccw_device_halt(channel->ccwdev, (addr_t) channel);
 433         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
 434         if (rc) {
 435                 LCS_DBF_TEXT_(4,trace,"ehsc%s", channel->ccwdev->dev.bus_id);
 436                 return rc;
 437         }
 438         /* Asynchronous halt initialted. Wait for its completion. */
 439         wait_event(channel->wait_q, (channel->state == CH_STATE_HALTED));
 440         lcs_clear_channel(channel);
 441         return 0;
 442 }
 443
 444 /**
 445  * start read and write channel
 446  */
 447 static int
 448 lcs_start_channels(struct lcs_card *card)
 449 {
 450         int rc;
 451
 452         LCS_DBF_TEXT(2, trace, "chstart");
 453         /* start read channel */
 454         rc = lcs_start_channel(&card->read);
 455         if (rc)
 456                 return rc;
 457         /* start write channel */
 458         rc = lcs_start_channel(&card->write);
 459         if (rc)
 460                 lcs_stop_channel(&card->read);
 461         return rc;
 462 }
 463
 464 /**
 465  * stop read and write channel
 466  */
 467 static int
 468 lcs_stop_channels(struct lcs_card *card)
 469 {
 470         LCS_DBF_TEXT(2, trace, "chhalt");
 471         lcs_stop_channel(&card->read);
 472         lcs_stop_channel(&card->write);
 473         return 0;
 474 }
 475
 476 /**
 477  * Get empty buffer.
 478  */
 479 static struct lcs_buffer *
 480 __lcs_get_buffer(struct lcs_channel *channel)
 481 {
 482         int index;
 483
 484         LCS_DBF_TEXT(5, trace, "_getbuff");
 485         index = channel->io_idx;
 486         do {
 487                 if (channel->iob[index].state == BUF_STATE_EMPTY) {
 488                         channel->iob[index].state = BUF_STATE_LOCKED;
 489                         return channel->iob + index;
 490                 }
 491                 index = (index + 1) & (LCS_NUM_BUFFS - 1);
 492         } while (index != channel->io_idx);
 493         return NULL;
 494 }
 495
 496 static struct lcs_buffer *
 497 lcs_get_buffer(struct lcs_channel *channel)
 498 {
 499         struct lcs_buffer *buffer;
 500         unsigned long flags;
 501
 502         LCS_DBF_TEXT(5, trace, "getbuff");
 503         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
 504         buffer = __lcs_get_buffer(channel);
 505         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
 506         return buffer;
 507 }
 508
 509 /**
 510  * Resume channel program if the channel is suspended.
 511  */
 512 static int
 513 __lcs_resume_channel(struct lcs_channel *channel)
 514 {
 515         int rc;
 516
 517         if (channel->state != CH_STATE_SUSPENDED)
 518                 return 0;
 519         if (channel->ccws[channel->io_idx].flags & CCW_FLAG_SUSPEND)
 520                 return 0;
 521         LCS_DBF_TEXT_(5, trace, "rsch%s", channel->ccwdev->dev.bus_id);
 522         rc = ccw_device_resume(channel->ccwdev);
 523         if (rc) {
 524                 LCS_DBF_TEXT_(4, trace, "ersc%s", channel->ccwdev->dev.bus_id);
 525                 PRINT_ERR("Error in lcs_resume_channel: rc=%d\n",rc);
 526         } else
 527                 channel->state = CH_STATE_RUNNING;
 528         return rc;
 529
 530 }
 531
 532 /**
 533  * Make a buffer ready for processing.
 534  */
 535 static inline void
 536 __lcs_ready_buffer_bits(struct lcs_channel *channel, int index)
 537 {
 538         int prev, next;
 539
 540         LCS_DBF_TEXT(5, trace, "rdybits");
 541         prev = (index - 1) & (LCS_NUM_BUFFS - 1);
 542         next = (index + 1) & (LCS_NUM_BUFFS - 1);
 543         /* Check if we may clear the suspend bit of this buffer. */
 544         if (channel->ccws[next].flags & CCW_FLAG_SUSPEND) {
 545                 /* Check if we have to set the PCI bit. */
 546                 if (!(channel->ccws[prev].flags & CCW_FLAG_SUSPEND))
 547                         /* Suspend bit of the previous buffer is not set. */
 548                         channel->ccws[index].flags |= CCW_FLAG_PCI;
 549                 /* Suspend bit of the next buffer is set. */
 550                 channel->ccws[index].flags &= ~CCW_FLAG_SUSPEND;
 551         }
 552 }
 553
 554 static int
 555 lcs_ready_buffer(struct lcs_channel *channel, struct lcs_buffer *buffer)
 556 {
 557         unsigned long flags;
 558         int index, rc;
 559
 560         LCS_DBF_TEXT(5, trace, "rdybuff");
 561         if (buffer->state != BUF_STATE_LOCKED &&
 562             buffer->state != BUF_STATE_PROCESSED)
 563                 BUG();
 564         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
 565         buffer->state = BUF_STATE_READY;
 566         index = buffer - channel->iob;
 567         /* Set length. */
 568         channel->ccws[index].count = buffer->count;
 569         /* Check relevant PCI/suspend bits. */
 570         __lcs_ready_buffer_bits(channel, index);
 571         rc = __lcs_resume_channel(channel);
 572         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
 573         return rc;
 574 }
 575
 576 /**
 577  * Mark the buffer as processed. Take care of the suspend bit
 578  * of the previous buffer. This function is called from
 579  * interrupt context, so the lock must not be taken.
 580  */
 581 static int
 582 __lcs_processed_buffer(struct lcs_channel *channel, struct lcs_buffer *buffer)
 583 {
 584         int index, prev, next;
 585
 586         LCS_DBF_TEXT(5, trace, "prcsbuff");
 587         if (buffer->state != BUF_STATE_READY)
 588                 BUG();
 589         buffer->state = BUF_STATE_PROCESSED;
 590         index = buffer - channel->iob;
 591         prev = (index - 1) & (LCS_NUM_BUFFS - 1);
 592         next = (index + 1) & (LCS_NUM_BUFFS - 1);
 593         /* Set the suspend bit and clear the PCI bit of this buffer. */
 594         channel->ccws[index].flags |= CCW_FLAG_SUSPEND;
 595         channel->ccws[index].flags &= ~CCW_FLAG_PCI;
 596         /* Check the suspend bit of the previous buffer. */
 597         if (channel->iob[prev].state == BUF_STATE_READY) {
 598                 /*
 599                  * Previous buffer is in state ready. It might have
 600                  * happened in lcs_ready_buffer that the suspend bit
 601                  * has not been cleared to avoid an endless loop.
 602                  * Do it now.
 603                  */
 604                 __lcs_ready_buffer_bits(channel, prev);
 605         }
 606         /* Clear PCI bit of next buffer. */
 607         channel->ccws[next].flags &= ~CCW_FLAG_PCI;
 608         return __lcs_resume_channel(channel);
 609 }
 610
 611 /**
 612  * Put a processed buffer back to state empty.
 613  */
 614 static void
 615 lcs_release_buffer(struct lcs_channel *channel, struct lcs_buffer *buffer)
 616 {
 617         unsigned long flags;
 618
 619         LCS_DBF_TEXT(5, trace, "relbuff");
 620         if (buffer->state != BUF_STATE_LOCKED &&
 621             buffer->state != BUF_STATE_PROCESSED)
 622                 BUG();
 623         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
 624         buffer->state = BUF_STATE_EMPTY;
 625         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
 626 }
 627
 628 /**
 629  * Get buffer for a lan command.
 630  */
 631 static struct lcs_buffer *
 632 lcs_get_lancmd(struct lcs_card *card, int count)
 633 {
 634         struct lcs_buffer *buffer;
 635         struct lcs_cmd *cmd;
 636
 637         LCS_DBF_TEXT(4, trace, "getlncmd");
 638         /* Get buffer and wait if none is available. */
 639         wait_event(card->write.wait_q,
 640                    ((buffer = lcs_get_buffer(&card->write)) != NULL));
 641         count += sizeof(struct lcs_header);
 642         *(__u16 *)(buffer->data + count) = 0;
 643         buffer->count = count + sizeof(__u16);
 644         buffer->callback = lcs_release_buffer;
 645         cmd = (struct lcs_cmd *) buffer->data;
 646         cmd->offset = count;
 647         cmd->type = LCS_FRAME_TYPE_CONTROL;
 648         cmd->slot = 0;
 649         return buffer;
 650 }
 651
 652 /**
 653  * Notifier function for lancmd replies. Called from read irq.
 654  */
 655 static void
 656 lcs_notify_lancmd_waiters(struct lcs_card *card, struct lcs_cmd *cmd)
 657 {
 658         struct list_head *l, *n;
 659         struct lcs_reply *reply;
 660
 661         LCS_DBF_TEXT(4, trace, "notiwait");
 662         spin_lock(&card->lock);
 663         list_for_each_safe(l, n, &card->lancmd_waiters) {
 664                 reply = list_entry(l, struct lcs_reply, list);
 665                 if (reply->sequence_no == cmd->sequence_no) {
 666                         list_del(&reply->list);
 667                         if (reply->callback != NULL)
 668                                 reply->callback(card, cmd);
 669                         reply->received = 1;
 670                         reply->rc = cmd->return_code;
 671                         wake_up(&reply->wait_q);
 672                         break;
 673                 }
 674         }
 675         spin_unlock(&card->lock);
 676 }
 677
 678 /**
 679  * Emit buffer of a lan comand.
 680  */
 681 void
 682 lcs_lancmd_timeout(unsigned long data)
 683 {
 684         struct lcs_reply *reply;
 685
 686         LCS_DBF_TEXT(4, trace, "timeout");
 687         reply = (struct lcs_reply *) data;
 688         list_del(&reply->list);
 689         reply->received = 1;
 690         reply->rc = -ETIME;
 691         wake_up(&reply->wait_q);
 692 }
 693
 694 static int
 695 lcs_send_lancmd(struct lcs_card *card, struct lcs_buffer *buffer,
 696                 void (*reply_callback)(struct lcs_card *, struct lcs_cmd *))
 697 {
 698         struct lcs_reply reply;
 699         struct lcs_cmd *cmd;
 700         struct timer_list timer;
 701         int rc;
 702
 703         LCS_DBF_TEXT(4, trace, "sendcmd");
 704         cmd = (struct lcs_cmd *) buffer->data;
 705         cmd->sequence_no = ++card->sequence_no;
 706         cmd->return_code = 0;
 707         reply.sequence_no = cmd->sequence_no;
 708         reply.callback = reply_callback;
 709         reply.received = 0;
 710         reply.rc = 0;
 711         init_waitqueue_head(&reply.wait_q);
 712         spin_lock(&card->lock);
 713         list_add_tail(&reply.list, &card->lancmd_waiters);
 714         spin_unlock(&card->lock);
 715         buffer->callback = lcs_release_buffer;
 716         rc = lcs_ready_buffer(&card->write, buffer);
 717         if (rc)
 718                 return rc;
 719         init_timer(&timer);
 720         timer.function = lcs_lancmd_timeout;
 721         timer.data = (unsigned long) &reply;
 722         timer.expires = jiffies + HZ*card->lancmd_timeout;
 723         add_timer(&timer);
 724         wait_event(reply.wait_q, reply.received);
 725         del_timer(&timer);
 726         LCS_DBF_TEXT_(4, trace, "rc:%d",reply.rc);
 727         return reply.rc ? -EIO : 0;
 728 }
 729
 730 /**
 731  * LCS startup command
 732  */
 733 static int
 734 lcs_send_startup(struct lcs_card *card, __u8 initiator)
 735 {
 736         struct lcs_buffer *buffer;
 737         struct lcs_cmd *cmd;
 738
 739         LCS_DBF_TEXT(2, trace, "startup");
 740         buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE);
 741         cmd = (struct lcs_cmd *) buffer->data;
 742         cmd->cmd_code = LCS_CMD_STARTUP;
 743         cmd->initiator = initiator;
 744         cmd->cmd.lcs_startup.buff_size = LCS_IOBUFFERSIZE;
 745         return lcs_send_lancmd(card, buffer, NULL);
 746 }
 747
 748 /**
 749  * LCS shutdown command
 750  */
 751 static int
 752 lcs_send_shutdown(struct lcs_card *card)
 753 {
 754         struct lcs_buffer *buffer;
 755         struct lcs_cmd *cmd;
 756
 757         LCS_DBF_TEXT(2, trace, "shutdown");
 758         buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE);
 759         cmd = (struct lcs_cmd *) buffer->data;
 760         cmd->cmd_code = LCS_CMD_SHUTDOWN;
 761         cmd->initiator = LCS_INITIATOR_TCPIP;
 762         return lcs_send_lancmd(card, buffer, NULL);
 763 }
 764
 765 /**
 766  * LCS lanstat command
 767  */
 768 static void
 769 __lcs_lanstat_cb(struct lcs_card *card, struct lcs_cmd *cmd)
 770 {
 771         LCS_DBF_TEXT(2, trace, "statcb");
 772         memcpy(card->mac, cmd->cmd.lcs_lanstat_cmd.mac_addr, LCS_MAC_LENGTH);
 773 }
 774
 775 static int
 776 lcs_send_lanstat(struct lcs_card *card)
 777 {
 778         struct lcs_buffer *buffer;
 779         struct lcs_cmd *cmd;
 780
 781         LCS_DBF_TEXT(2,trace, "cmdstat");
 782         buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE);
 783         cmd = (struct lcs_cmd *) buffer->data;
 784         /* Setup lanstat command. */
 785         cmd->cmd_code = LCS_CMD_LANSTAT;
 786         cmd->initiator = LCS_INITIATOR_TCPIP;
 787         cmd->cmd.lcs_std_cmd.lan_type = card->lan_type;
 788         cmd->cmd.lcs_std_cmd.portno = card->portno;
 789         return lcs_send_lancmd(card, buffer, __lcs_lanstat_cb);
 790 }
 791
 792 /**
 793  * send stoplan command
 794  */
 795 static int
 796 lcs_send_stoplan(struct lcs_card *card, __u8 initiator)
 797 {
 798         struct lcs_buffer *buffer;
 799         struct lcs_cmd *cmd;
 800
 801         LCS_DBF_TEXT(2, trace, "cmdstpln");
 802         buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE);
 803         cmd = (struct lcs_cmd *) buffer->data;
 804         cmd->cmd_code = LCS_CMD_STOPLAN;
 805         cmd->initiator = initiator;
 806         cmd->cmd.lcs_std_cmd.lan_type = card->lan_type;
 807         cmd->cmd.lcs_std_cmd.portno = card->portno;
 808         return lcs_send_lancmd(card, buffer, NULL);
 809 }
 810
 811 /**
 812  * send startlan command
 813  */
 814 static void
 815 __lcs_send_startlan_cb(struct lcs_card *card, struct lcs_cmd *cmd)
 816 {
 817         LCS_DBF_TEXT(2, trace, "srtlancb");
 818         card->lan_type = cmd->cmd.lcs_std_cmd.lan_type;
 819         card->portno = cmd->cmd.lcs_std_cmd.portno;
 820 }
 821
 822 static int
 823 lcs_send_startlan(struct lcs_card *card, __u8 initiator)
 824 {
 825         struct lcs_buffer *buffer;
 826         struct lcs_cmd *cmd;
 827
 828         LCS_DBF_TEXT(2, trace, "cmdstaln");
 829         buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE);
 830         cmd = (struct lcs_cmd *) buffer->data;
 831         cmd->cmd_code = LCS_CMD_STARTLAN;
 832         cmd->initiator = initiator;
 833         cmd->cmd.lcs_std_cmd.lan_type = card->lan_type;
 834         cmd->cmd.lcs_std_cmd.portno = card->portno;
 835         return lcs_send_lancmd(card, buffer, __lcs_send_startlan_cb);
 836 }
 837
 838 #ifdef CONFIG_IP_MULTICAST
 839 /**
 840  * send setipm command (Multicast)
 841  */
 842 static int
 843 lcs_send_setipm(struct lcs_card *card,struct lcs_ipm_list *ipm_list)
 844 {
 845         struct lcs_buffer *buffer;
 846         struct lcs_cmd *cmd;
 847
 848         LCS_DBF_TEXT(2, trace, "cmdsetim");
 849         buffer = lcs_get_lancmd(card, LCS_MULTICAST_CMD_SIZE);
 850         cmd = (struct lcs_cmd *) buffer->data;
 851         cmd->cmd_code = LCS_CMD_SETIPM;
 852         cmd->initiator = LCS_INITIATOR_TCPIP;
 853         cmd->cmd.lcs_qipassist.lan_type = card->lan_type;
 854         cmd->cmd.lcs_qipassist.portno = card->portno;
 855         cmd->cmd.lcs_qipassist.version = 4;
 856         cmd->cmd.lcs_qipassist.num_ip_pairs = 1;
 857         memcpy(cmd->cmd.lcs_qipassist.lcs_ipass_ctlmsg.ip_mac_pair,
 858                &ipm_list->ipm, sizeof (struct lcs_ip_mac_pair));
 859         LCS_DBF_TEXT_(2, trace, "%x",ipm_list->ipm.ip_addr);
 860         return lcs_send_lancmd(card, buffer, NULL);
 861 }
 862
 863 /**
 864  * send delipm command (Multicast)
 865  */
 866 static int
 867 lcs_send_delipm(struct lcs_card *card,struct lcs_ipm_list *ipm_list)
 868 {
 869         struct lcs_buffer *buffer;
 870         struct lcs_cmd *cmd;
 871
 872         LCS_DBF_TEXT(2, trace, "cmddelim");
 873         buffer = lcs_get_lancmd(card, LCS_MULTICAST_CMD_SIZE);
 874         cmd = (struct lcs_cmd *) buffer->data;
 875         cmd->cmd_code = LCS_CMD_DELIPM;
 876         cmd->initiator = LCS_INITIATOR_TCPIP;
 877         cmd->cmd.lcs_qipassist.lan_type = card->lan_type;
 878         cmd->cmd.lcs_qipassist.portno = card->portno;
 879         cmd->cmd.lcs_qipassist.version = 4;
 880         cmd->cmd.lcs_qipassist.num_ip_pairs = 1;
 881         memcpy(cmd->cmd.lcs_qipassist.lcs_ipass_ctlmsg.ip_mac_pair,
 882                &ipm_list->ipm, sizeof (struct lcs_ip_mac_pair));
 883         LCS_DBF_TEXT_(2, trace, "%x",ipm_list->ipm.ip_addr);
 884         return lcs_send_lancmd(card, buffer, NULL);
 885 }
 886
 887 /**
 888  * check if multicast is supported by LCS
 889  */
 890 static void
 891 __lcs_check_multicast_cb(struct lcs_card *card, struct lcs_cmd *cmd)
 892 {
 893         LCS_DBF_TEXT(2, trace, "chkmccb");
 894         card->ip_assists_supported =
 895                 cmd->cmd.lcs_qipassist.ip_assists_supported;
 896         card->ip_assists_enabled =
 897                 cmd->cmd.lcs_qipassist.ip_assists_enabled;
 898 }
 899
 900 static int
 901 lcs_check_multicast_support(struct lcs_card *card)
 902 {
 903         struct lcs_buffer *buffer;
 904         struct lcs_cmd *cmd;
 905         int rc;
 906
 907         LCS_DBF_TEXT(2, trace, "cmdqipa");
 908         /* Send query ipassist. */
 909         buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE);
 910         cmd = (struct lcs_cmd *) buffer->data;
 911         cmd->cmd_code = LCS_CMD_QIPASSIST;
 912         cmd->initiator = LCS_INITIATOR_TCPIP;
 913         cmd->cmd.lcs_qipassist.lan_type = card->lan_type;
 914         cmd->cmd.lcs_qipassist.portno = card->portno;
 915         cmd->cmd.lcs_qipassist.version = 4;
 916         cmd->cmd.lcs_qipassist.num_ip_pairs = 1;
 917         rc = lcs_send_lancmd(card, buffer, __lcs_check_multicast_cb);
 918         if (rc != 0) {
 919                 PRINT_ERR("Query IPAssist failed. Assuming unsupported!\n");
 920                 return -EOPNOTSUPP;
 921         }
 922         /* Print out supported assists: IPv6 */
 923         PRINT_INFO("LCS device %s %s IPv6 support\n", card->dev->name,
 924                    (card->ip_assists_supported & LCS_IPASS_IPV6_SUPPORT) ?
 925                    "with" : "without");
 926         /* Print out supported assist: Multicast */
 927         PRINT_INFO("LCS device %s %s Multicast support\n", card->dev->name,
 928                    (card->ip_assists_supported & LCS_IPASS_MULTICAST_SUPPORT) ?
 929                    "with" : "without");
 930         if (card->ip_assists_supported & LCS_IPASS_MULTICAST_SUPPORT)
 931                 return 0;
 932         return -EOPNOTSUPP;
 933 }
 934
 935 /**
 936  * set or del multicast address on LCS card
 937  */
 938 static int
 939 lcs_fix_multicast_list(void *data)
 940 {
 941         struct list_head *l, *n;
 942         struct lcs_ipm_list *ipm;
 943         struct lcs_card *card;
 944
 945         card = (struct lcs_card *) data;
 946
 947         daemonize("fixipm");
 948         LCS_DBF_TEXT(4,trace, "fixipm");
 949         spin_lock(&card->lock);
 950         list_for_each_safe(l, n, &card->ipm_list) {
 951                 ipm = list_entry(l, struct lcs_ipm_list, list);
 952                 switch (ipm->ipm_state) {
 953                 case LCS_IPM_STATE_SET_REQUIRED:
 954                         if (lcs_send_setipm(card, ipm))
 955                                 PRINT_INFO("Adding multicast address failed."
 956                                            "Table possibly full!\n");
 957                         else
 958                                 ipm->ipm_state = LCS_IPM_STATE_ON_CARD;
 959                         break;
 960                 case LCS_IPM_STATE_DEL_REQUIRED:
 961                         lcs_send_delipm(card, ipm);
 962                         list_del(&ipm->list);
 963                         kfree(ipm);
 964                         break;
 965                 case LCS_IPM_STATE_ON_CARD:
 966                         break;
 967                 }
 968         }
 969         if (card->state == DEV_STATE_UP)
 970                 netif_wake_queue(card->dev);
 971         spin_unlock(&card->lock);
 972         return 0;
 973 }
 974
 975 /**
 976  * get mac address for the relevant Multicast address
 977  */
 978 static void
 979 lcs_get_mac_for_ipm(__u32 ipm, char *mac, struct net_device *dev)
 980 {
 981         LCS_DBF_TEXT(4,trace, "getmac");
 982         if (dev->type == ARPHRD_IEEE802_TR)
 983                 ip_tr_mc_map(ipm, mac);
 984         else
 985                 ip_eth_mc_map(ipm, mac);
 986 }
 987
 988 /**
 989  * function called by net device to handle multicast address relevant things
 990  */
 991 static void
 992 lcs_set_multicast_list(struct net_device *dev)
 993 {
 994         char buf[MAX_ADDR_LEN];
 995         struct list_head *l;
 996         struct ip_mc_list *im4;
 997         struct in_device *in4_dev;
 998         struct lcs_ipm_list *ipm, *tmp;
 999         struct lcs_card *card;
1000
1001         LCS_DBF_TEXT(4, trace, "setmulti");
1002         in4_dev = in_dev_get(dev);
1003         if (in4_dev == NULL)
1004                 return;
1005         read_lock(&in4_dev->lock);
1006         card = (struct lcs_card *) dev->priv;
1007         spin_lock(&card->lock);
1008         /* Check for multicast addresses to be removed. */
1009         list_for_each(l, &card->ipm_list) {
1010                 ipm = list_entry(l, struct lcs_ipm_list, list);
1011                 for (im4 = in4_dev->mc_list; im4 != NULL; im4 = im4->next) {
1012                         lcs_get_mac_for_ipm(im4->multiaddr, buf, dev);
1013                         if (memcmp(buf, &ipm->ipm.mac_addr,
1014                                    LCS_MAC_LENGTH) == 0 &&
1015                             ipm->ipm.ip_addr == im4->multiaddr)
1016                                 break;
1017                 }
1018                 if (im4 == NULL)
1019                         ipm->ipm_state = LCS_IPM_STATE_DEL_REQUIRED;
1020         }
1021         /* Check for multicast addresses to be added. */
1022         for (im4 = in4_dev->mc_list; im4; im4 = im4->next) {
1023                 lcs_get_mac_for_ipm(im4->multiaddr, buf, dev);
1024                 ipm = NULL;
1025                 list_for_each(l, &card->ipm_list) {
1026                         tmp = list_entry(l, struct lcs_ipm_list, list);
1027                         if (memcmp(buf, &tmp->ipm.mac_addr,
1028                                    LCS_MAC_LENGTH) == 0 &&
1029                             tmp->ipm.ip_addr == im4->multiaddr) {
1030                                 ipm = tmp;
1031                                 break;
1032                         }
1033                 }
1034                 if (ipm != NULL)
1035                         continue;       /* Address already in list. */
1036                 ipm = (struct lcs_ipm_list *)
1037                         kmalloc(sizeof(struct lcs_ipm_list), GFP_ATOMIC);
1038                 if (ipm == NULL) {
1039                         PRINT_INFO("Not enough memory to add "
1040                                    "new multicast entry!\n");
1041                         break;
1042                 }
1043                 memset(ipm, 0, sizeof(struct lcs_ipm_list));
1044                 memcpy(&ipm->ipm.mac_addr, buf, LCS_MAC_LENGTH);
1045                 ipm->ipm.ip_addr = im4->multiaddr;
1046                 ipm->ipm_state = LCS_IPM_STATE_SET_REQUIRED;
1047                 list_add(&ipm->list, &card->ipm_list);
1048         }
1049         spin_unlock(&card->lock);
1050         read_unlock(&in4_dev->lock);
1051         set_bit(3, &card->thread_mask);
1052         schedule_work(&card->kernel_thread_starter);
1053 }
1054
1055 #endif /* CONFIG_IP_MULTICAST */
1056
1057 /**
1058  * IRQ Handler for LCS channels
1059  */
1060 static void
1061 lcs_irq(struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
1062 {
1063         struct lcs_card *card;
1064         struct lcs_channel *channel;
1065         int index;
1066
1067         card = CARD_FROM_DEV(cdev);
1068         if (card->read.ccwdev == cdev)
1069                 channel = &card->read;
1070         else
1071                 channel = &card->write;
1072
1073         LCS_DBF_TEXT_(5, trace, "Rint%s",cdev->dev.bus_id);
1074         LCS_DBF_TEXT_(5, trace, "%4x%4x",irb->scsw.cstat, irb->scsw.dstat);
1075
1076         /* How far in the ccw chain have we processed? */
1077         if ((channel->state != CH_STATE_INIT) &&
1078             (irb->scsw.fctl & SCSW_FCTL_START_FUNC)) {
1079                 index = (struct ccw1 *) __va((addr_t) irb->scsw.cpa)
1080                         - channel->ccws;
1081                 if ((irb->scsw.actl & SCSW_ACTL_SUSPENDED) ||
1082                     (irb->scsw.cstat | SCHN_STAT_PCI))
1083                         /* Bloody io subsystem tells us lies about cpa... */
1084                         index = (index - 1) & (LCS_NUM_BUFFS - 1);
1085                 while (channel->io_idx != index) {
1086                         __lcs_processed_buffer(channel,
1087                                                channel->iob + channel->io_idx);
1088                         channel->io_idx =
1089                                 (channel->io_idx + 1) & (LCS_NUM_BUFFS - 1);
1090                 }
1091         }
1092
1093         if ((irb->scsw.dstat & DEV_STAT_DEV_END) ||
1094             (irb->scsw.dstat & DEV_STAT_CHN_END) ||
1095             (irb->scsw.dstat & DEV_STAT_UNIT_CHECK))
1096                 /* Mark channel as stopped. */
1097                 channel->state = CH_STATE_STOPPED;
1098         else if (irb->scsw.actl & SCSW_ACTL_SUSPENDED)
1099                 /* CCW execution stopped on a suspend bit. */
1100                 channel->state = CH_STATE_SUSPENDED;
1101
1102         if (irb->scsw.fctl & SCSW_FCTL_HALT_FUNC) {
1103                 if (irb->scsw.cc != 0) {
1104                         ccw_device_halt(channel->ccwdev, (addr_t) channel);
1105                         return;
1106                 }
1107                 /* The channel has been stopped by halt_IO. */
1108                 channel->state = CH_STATE_HALTED;
1109         }
1110
1111         if (irb->scsw.fctl & SCSW_FCTL_CLEAR_FUNC) {
1112                 channel->state = CH_STATE_CLEARED;
1113         }
1114         /* Do the rest in the tasklet. */
1115         tasklet_schedule(&channel->irq_tasklet);
1116 }
1117
1118 /**
1119  * Tasklet for IRQ handler
1120  */
1121 static void
1122 lcs_tasklet(unsigned long data)
1123 {
1124         unsigned long flags;
1125         struct lcs_channel *channel;
1126         struct lcs_buffer *iob;
1127         int buf_idx;
1128         int rc;
1129
1130         channel = (struct lcs_channel *) data;
1131         LCS_DBF_TEXT_(5, trace, "tlet%s",channel->ccwdev->dev.bus_id);
1132
1133         /* Check for processed buffers. */
1134         iob = channel->iob;
1135         buf_idx = channel->buf_idx;
1136         while (iob[buf_idx].state == BUF_STATE_PROCESSED) {
1137                 /* Do the callback thing. */
1138                 if (iob[buf_idx].callback != NULL)
1139                         iob[buf_idx].callback(channel, iob + buf_idx);
1140                 buf_idx = (buf_idx + 1) & (LCS_NUM_BUFFS - 1);
1141         }
1142         channel->buf_idx = buf_idx;
1143
1144         if (channel->state == CH_STATE_STOPPED)
1145                 // FIXME: what if rc != 0 ??
1146                 rc = lcs_start_channel(channel);
1147         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1148         if (channel->state == CH_STATE_SUSPENDED &&
1149             channel->iob[channel->io_idx].state == BUF_STATE_READY) {
1150                 // FIXME: what if rc != 0 ??
1151                 rc = __lcs_resume_channel(channel);
1152         }
1153         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1154
1155         /* Something happened on the channel. Wake up waiters. */
1156         wake_up(&channel->wait_q);
1157 }
1158
1159 /**
1160  * Finish current tx buffer and make it ready for transmit.
1161  */
1162 static void
1163 __lcs_emit_txbuffer(struct lcs_card *card)
1164 {
1165         LCS_DBF_TEXT(5, trace, "emittx");
1166         *(__u16 *)(card->tx_buffer->data + card->tx_buffer->count) = 0;
1167         card->tx_buffer->count += 2;
1168         lcs_ready_buffer(&card->write, card->tx_buffer);
1169         card->tx_buffer = NULL;
1170         card->tx_emitted++;
1171 }
1172
1173 /**
1174  * Callback for finished tx buffers.
1175  */
1176 static void
1177 lcs_txbuffer_cb(struct lcs_channel *channel, struct lcs_buffer *buffer)
1178 {
1179         struct lcs_card *card;
1180
1181         LCS_DBF_TEXT(5, trace, "txbuffcb");
1182         /* Put buffer back to pool. */
1183         lcs_release_buffer(channel, buffer);
1184         card = (struct lcs_card *)
1185                 ((char *) channel - offsetof(struct lcs_card, write));
1186         spin_lock(&card->lock);
1187         card->tx_emitted--;
1188         if (card->tx_emitted <= 0 && card->tx_buffer != NULL)
1189                 /*
1190                  * Last running tx buffer has finished. Submit partially
1191                  * filled current buffer.
1192                  */
1193                 __lcs_emit_txbuffer(card);
1194         spin_unlock(&card->lock);
1195 }
1196
1197 /**
1198  * Packet transmit function called by network stack
1199  */
1200 static int
1201 __lcs_start_xmit(struct lcs_card *card, struct sk_buff *skb,
1202                  struct net_device *dev)
1203 {
1204         struct lcs_header *header;
1205
1206         LCS_DBF_TEXT(5, trace, "hardxmit");
1207         if (skb == NULL) {
1208                 card->stats.tx_dropped++;
1209                 card->stats.tx_errors++;
1210                 return -EIO;
1211         }
1212         if (card->state != DEV_STATE_UP) {
1213                 dev_kfree_skb(skb);
1214                 card->stats.tx_dropped++;
1215                 card->stats.tx_errors++;
1216                 card->stats.tx_carrier_errors++;
1217                 return 0;
1218         }
1219         if (netif_queue_stopped(dev) ) {
1220                 card->stats.tx_dropped++;
1221                 return -EBUSY;
1222         }
1223         if (card->tx_buffer != NULL &&
1224             card->tx_buffer->count + sizeof(struct lcs_header) +
1225             skb->len + sizeof(u16) > LCS_IOBUFFERSIZE)
1226                 /* skb too big for current tx buffer. */
1227                 __lcs_emit_txbuffer(card);
1228         if (card->tx_buffer == NULL) {
1229                 /* Get new tx buffer */
1230                 card->tx_buffer = lcs_get_buffer(&card->write);
1231                 if (card->tx_buffer == NULL) {
1232                         card->stats.tx_dropped++;
1233                         return -EBUSY;
1234                 }
1235                 card->tx_buffer->callback = lcs_txbuffer_cb;
1236                 card->tx_buffer->count = 0;
1237         }
1238         header = (struct lcs_header *)
1239                 (card->tx_buffer->data + card->tx_buffer->count);
1240         card->tx_buffer->count += skb->len + sizeof(struct lcs_header);
1241         header->offset = card->tx_buffer->count;
1242         header->type = card->lan_type;
1243         header->slot = card->portno;
1244         memcpy(header + 1, skb->data, skb->len);
1245         card->stats.tx_bytes += skb->len;
1246         card->stats.tx_packets++;
1247         dev_kfree_skb(skb);
1248         if (card->tx_emitted <= 0)
1249                 /* If this is the first tx buffer emit it immediately. */
1250                 __lcs_emit_txbuffer(card);
1251         return 0;
1252 }
1253
1254 static int
1255 lcs_start_xmit(struct sk_buff *skb, struct net_device *dev)
1256 {
1257         struct lcs_card *card;
1258         int rc;
1259
1260         LCS_DBF_TEXT(5, trace, "pktxmit");
1261         card = (struct lcs_card *) dev->priv;
1262         spin_lock(&card->lock);
1263         rc = __lcs_start_xmit(card, skb, dev);
1264         spin_unlock(&card->lock);
1265         return rc;
1266 }
1267
1268 /**
1269  * send startlan and lanstat command to make LCS device ready
1270  */
1271 static int
1272 lcs_startlan_auto(struct lcs_card *card)
1273 {
1274         int rc;
1275
1276         LCS_DBF_TEXT(2, trace, "strtauto");
1277 #ifdef CONFIG_NET_ETHERNET
1278         card->lan_type = LCS_FRAME_TYPE_ENET;
1279         rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP);
1280         if (rc == 0)
1281                 return 0;
1282
1283 #endif
1284 #ifdef CONFIG_TR
1285         card->lan_type = LCS_FRAME_TYPE_TR;
1286         rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP);
1287         if (rc == 0)
1288                 return 0;
1289 #endif
1290 #ifdef CONFIG_FDDI
1291         card->lan_type = LCS_FRAME_TYPE_FDDI;
1292         rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP);
1293         if (rc == 0)
1294                 return 0;
1295 #endif
1296         return -EIO;
1297 }
1298
1299 static int
1300 lcs_startlan(struct lcs_card *card)
1301 {
1302         int rc, i;
1303
1304         LCS_DBF_TEXT(2, trace, "startlan");
1305         rc = 0;
1306         if (card->portno != LCS_INVALID_PORT_NO) {
1307                 if (card->lan_type == LCS_FRAME_TYPE_AUTO)
1308                         rc = lcs_startlan_auto(card);
1309                 else
1310                         rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP);
1311         } else {
1312                 for (i = 0; i <= 16; i++) {
1313                         card->portno = i;
1314                         if (card->lan_type != LCS_FRAME_TYPE_AUTO)
1315                                 rc = lcs_send_startlan(card,
1316                                                        LCS_INITIATOR_TCPIP);
1317                         else
1318                                 /* autodetecting lan type */
1319                                 rc = lcs_startlan_auto(card);
1320                         if (rc == 0)
1321                                 break;
1322                 }
1323         }
1324         if (rc == 0)
1325                 return lcs_send_lanstat(card);
1326         return rc;
1327 }
1328
1329 /**
1330  * LCS detect function
1331  * setup channels and make them I/O ready
1332  */
1333 static int
1334 lcs_detect(struct lcs_card *card)
1335 {
1336         int rc = 0;
1337
1338         LCS_DBF_TEXT(2, setup, "lcsdetct");
1339         /* start/reset card */
1340         if (card->dev)
1341                 netif_stop_queue(card->dev);
1342         card->write.state = CH_STATE_INIT;
1343         card->read.state = CH_STATE_INIT;
1344         rc = lcs_stop_channels(card);
1345         if (rc == 0) {
1346                 rc = lcs_start_channels(card);
1347                 if (rc == 0) {
1348                         rc = lcs_send_startup(card, LCS_INITIATOR_TCPIP);
1349                         if (rc == 0)
1350                                 rc = lcs_startlan(card);
1351                 }
1352         }
1353         if (rc == 0) {
1354                 card->state = DEV_STATE_UP;
1355         } else {
1356                 card->state = DEV_STATE_DOWN;
1357                 card->write.state = CH_STATE_INIT;
1358                 card->read.state =  CH_STATE_INIT;
1359         }
1360         return rc;
1361 }
1362
1363 /**
1364  * reset card
1365  */
1366 static int
1367 lcs_resetcard(struct lcs_card *card)
1368 {
1369         int retries;
1370
1371         LCS_DBF_TEXT(2, trace, "rescard");
1372         for (retries = 0; retries < 10; retries++) {
1373                 if (lcs_detect(card) == 0) {
1374                         netif_wake_queue(card->dev);
1375                         card->state = DEV_STATE_UP;
1376                         PRINT_INFO("LCS device %s successfully restarted!\n",
1377                                    card->dev->name);
1378                         return 0;
1379                 }
1380                 schedule_timeout(3 * HZ);
1381         }
1382         PRINT_ERR("Error in Reseting LCS card!\n");
1383         return -EIO;
1384 }
1385
1386 /**
1387  * LCS Stop card
1388  */
1389 static int
1390 lcs_stopcard(struct lcs_card *card)
1391 {
1392         int rc;
1393
1394         LCS_DBF_TEXT(3, setup, "stopcard");
1395
1396         if (card->read.state != CH_STATE_STOPPED &&
1397             card->write.state != CH_STATE_STOPPED &&
1398             card->state == DEV_STATE_UP) {
1399                 rc = lcs_send_stoplan(card,LCS_INITIATOR_TCPIP);
1400                 rc = lcs_send_shutdown(card);
1401         }
1402         rc = lcs_stop_channels(card);
1403         card->state = DEV_STATE_DOWN;
1404
1405         return rc;
1406 }
1407
1408 /**
1409  * LGW initiated commands
1410  */
1411 static int
1412 lcs_lgw_startlan_thread(void *data)
1413 {
1414         struct lcs_card *card;
1415
1416         card = (struct lcs_card *) data;
1417         daemonize("lgwstpln");
1418         LCS_DBF_TEXT(4, trace, "lgwstpln");
1419         if (card->dev)
1420                 netif_stop_queue(card->dev);
1421         if (lcs_startlan(card) == 0) {
1422                 netif_wake_queue(card->dev);
1423                 card->state = DEV_STATE_UP;
1424                 PRINT_INFO("LCS Startlan for device %s succeeded!\n",
1425                            card->dev->name);
1426
1427         } else
1428                 PRINT_ERR("LCS Startlan for device %s failed!\n",
1429                           card->dev->name);
1430         return 0;
1431 }
1432
1433 /**
1434  * Send startup command initiated by Lan Gateway
1435  */
1436 static int
1437 lcs_lgw_startup_thread(void *data)
1438 {
1439         int rc;
1440
1441         struct lcs_card *card;
1442
1443         card = (struct lcs_card *) data;
1444         daemonize("lgwstpln");
1445         LCS_DBF_TEXT(4, trace, "lgwstpln");
1446         if (card->dev)
1447                 netif_stop_queue(card->dev);
1448         rc = lcs_send_startup(card, LCS_INITIATOR_LGW);
1449         if (rc != 0) {
1450                 PRINT_ERR("Startup for LCS device %s initiated " \
1451                           "by LGW failed!\nReseting card ...\n",
1452                           card->dev->name);
1453                 /* do a card reset */
1454                 rc = lcs_resetcard(card);
1455                 if (rc == 0)
1456                         goto Done;
1457         }
1458         rc = lcs_startlan(card);
1459         if (rc == 0) {
1460                 netif_wake_queue(card->dev);
1461                 card->state = DEV_STATE_UP;
1462         }
1463 Done:
1464         if (rc == 0)
1465                 PRINT_INFO("LCS Startup for device %s succeeded!\n",
1466                            card->dev->name);
1467         else
1468                 PRINT_ERR("LCS Startup for device %s failed!\n",
1469                           card->dev->name);
1470         return 0;
1471 }
1472
1473
1474 /**
1475  * send stoplan command initiated by Lan Gateway
1476  */
1477 static int
1478 lcs_lgw_stoplan_thread(void *data)
1479 {
1480         struct lcs_card *card;
1481         int rc;
1482
1483         card = (struct lcs_card *) data;
1484         daemonize("lgwstop");
1485         LCS_DBF_TEXT(4, trace, "lgwstop");
1486         if (card->dev)
1487                 netif_stop_queue(card->dev);
1488         if (lcs_send_stoplan(card, LCS_INITIATOR_LGW) == 0)
1489                 PRINT_INFO("Stoplan for %s initiated by LGW succeeded!\n",
1490                            card->dev->name);
1491         else
1492                 PRINT_ERR("Stoplan %s initiated by LGW failed!\n",
1493                           card->dev->name);
1494         /*Try to reset the card, stop it on failure */
1495         rc = lcs_resetcard(card);
1496         if (rc != 0)
1497                 rc = lcs_stopcard(card);
1498         return rc;
1499 }
1500
1501 /**
1502  * Kernel Thread helper functions for LGW initiated commands
1503  */
1504 static void
1505 lcs_start_kernel_thread(struct lcs_card *card)
1506 {
1507         LCS_DBF_TEXT(5, trace, "krnthrd");
1508         if (test_and_clear_bit(0, &card->thread_mask))
1509                 kernel_thread(lcs_lgw_startup_thread, (void *) card, SIGCHLD);
1510         if (test_and_clear_bit(1, &card->thread_mask))
1511                 kernel_thread(lcs_lgw_startlan_thread, (void *) card, SIGCHLD);
1512         if (test_and_clear_bit(2, &card->thread_mask))
1513                 kernel_thread(lcs_lgw_stoplan_thread, (void *) card, SIGCHLD);
1514 #ifdef CONFIG_IP_MULTICAST
1515         if (test_and_clear_bit(3, &card->thread_mask))
1516                 kernel_thread(lcs_fix_multicast_list, (void *) card, SIGCHLD);
1517 #endif
1518 }
1519
1520 /**
1521  * Process control frames.
1522  */
1523 static void
1524 lcs_get_control(struct lcs_card *card, struct lcs_cmd *cmd)
1525 {
1526         LCS_DBF_TEXT(5, trace, "getctrl");
1527         if (cmd->initiator == LCS_INITIATOR_LGW) {
1528                 switch(cmd->cmd_code) {
1529                 case LCS_CMD_STARTUP:
1530                         set_bit(0, &card->thread_mask);
1531                         schedule_work(&card->kernel_thread_starter);
1532                         break;
1533                 case LCS_CMD_STARTLAN:
1534                         set_bit(1, &card->thread_mask);
1535                         schedule_work(&card->kernel_thread_starter);
1536                         break;
1537                 case LCS_CMD_STOPLAN:
1538                         set_bit(2, &card->thread_mask);
1539                         schedule_work(&card->kernel_thread_starter);
1540                         break;
1541                 default:
1542                         PRINT_INFO("UNRECOGNIZED LGW COMMAND\n");
1543                         break;
1544                 }
1545         } else
1546                 lcs_notify_lancmd_waiters(card, cmd);
1547 }
1548
1549 /**
1550  * Unpack network packet.
1551  */
1552 static void
1553 lcs_get_skb(struct lcs_card *card, char *skb_data, unsigned int skb_len)
1554 {
1555         struct sk_buff *skb;
1556
1557         LCS_DBF_TEXT(5, trace, "getskb");
1558         if (card->dev == NULL ||
1559             card->state != DEV_STATE_UP)
1560                 /* The card isn't up. Ignore the packet. */
1561                 return;
1562
1563         skb = dev_alloc_skb(skb_len);
1564         if (skb == NULL) {
1565                 PRINT_ERR("LCS: alloc_skb failed for device=%s\n",
1566                           card->dev->name);
1567                 card->stats.rx_dropped++;
1568                 return;
1569         }
1570         skb->dev = card->dev;
1571         memcpy(skb_put(skb, skb_len), skb_data, skb_len);
1572         skb->protocol = card->lan_type_trans(skb, card->dev);
1573         card->stats.rx_bytes += skb_len;
1574         card->stats.rx_packets++;
1575         netif_rx(skb);
1576 }
1577
1578 /**
1579  * LCS main routine to get packets and lancmd replies from the buffers
1580  */
1581 static void
1582 lcs_get_frames_cb(struct lcs_channel *channel, struct lcs_buffer *buffer)
1583 {
1584         struct lcs_card *card;
1585         struct lcs_header *lcs_hdr;
1586         __u16 offset;
1587
1588         LCS_DBF_TEXT(5, trace, "lcsgtpkt");
1589         lcs_hdr = (struct lcs_header *) buffer->data;
1590         if (lcs_hdr->offset == LCS_ILLEGAL_OFFSET) {
1591                 LCS_DBF_TEXT(4, trace, "-eiogpkt");
1592                 return;
1593         }
1594         card = (struct lcs_card *)
1595                 ((char *) channel - offsetof(struct lcs_card, read));
1596         offset = 0;
1597         while (lcs_hdr->offset != 0) {
1598                 if (lcs_hdr->offset <= 0 ||
1599                     lcs_hdr->offset > LCS_IOBUFFERSIZE ||
1600                     lcs_hdr->offset < offset) {
1601                         /* Offset invalid. */
1602                         card->stats.rx_length_errors++;
1603                         card->stats.rx_errors++;
1604                         return;
1605                 }
1606                 /* What kind of frame is it? */
1607                 if (lcs_hdr->type == LCS_FRAME_TYPE_CONTROL)
1608                         /* Control frame. */
1609                         lcs_get_control(card, (struct lcs_cmd *) lcs_hdr);
1610                 else if (lcs_hdr->type == LCS_FRAME_TYPE_ENET ||
1611                          lcs_hdr->type == LCS_FRAME_TYPE_TR ||
1612                          lcs_hdr->type == LCS_FRAME_TYPE_FDDI)
1613                         /* Normal network packet. */
1614                         lcs_get_skb(card, (char *)(lcs_hdr + 1),
1615                                     lcs_hdr->offset - offset -
1616                                     sizeof(struct lcs_header));
1617                 else
1618                         /* Unknown frame type. */
1619                         ; // FIXME: error message ?
1620                 /* Proceed to next frame. */
1621                 offset = lcs_hdr->offset;
1622                 lcs_hdr->offset = LCS_ILLEGAL_OFFSET;
1623                 lcs_hdr = (struct lcs_header *) (buffer->data + offset);
1624         }
1625         /* The buffer is now empty. Make it ready again. */
1626         lcs_ready_buffer(&card->read, buffer);
1627 }
1628
1629 /**
1630  * get network statistics for ifconfig and other user programs
1631  */
1632 static struct net_device_stats *
1633 lcs_getstats(struct net_device *dev)
1634 {
1635         struct lcs_card *card;
1636
1637         LCS_DBF_TEXT(4, trace, "netstats");
1638         card = (struct lcs_card *) dev->priv;
1639         return &card->stats;
1640 }
1641
1642 /**
1643  * stop lcs device
1644  * This function will be called by user doing ifconfig xxx down
1645  */
1646 static int
1647 lcs_stop_device(struct net_device *dev)
1648 {
1649         struct lcs_card *card;
1650         int rc;
1651
1652         LCS_DBF_TEXT(2, trace, "stopdev");
1653         card   = (struct lcs_card *) dev->priv;
1654         netif_stop_queue(dev);
1655         dev->flags &= ~IFF_UP;
1656         rc = lcs_stopcard(card);
1657         if (rc)
1658                 PRINT_ERR("Try it again!\n ");
1659         return rc;
1660 }
1661
1662 /**
1663  * start lcs device and make it runnable
1664  * This function will be called by user doing ifconfig xxx up
1665  */
1666 static int
1667 lcs_open_device(struct net_device *dev)
1668 {
1669         struct lcs_card *card;
1670         int rc;
1671
1672         LCS_DBF_TEXT(2, trace, "opendev");
1673         card = (struct lcs_card *) dev->priv;
1674         /* initialize statistics */
1675         rc = lcs_detect(card);
1676         if (rc) {
1677                 PRINT_ERR("LCS:Error in opening device!\n");
1678
1679         } else {
1680                 dev->flags |= IFF_UP;
1681                 netif_wake_queue(dev);
1682                 card->state = DEV_STATE_UP;
1683         }
1684         return rc;
1685 }
1686
1687 /**
1688  * show function for portno called by cat or similar things
1689  */
1690 static ssize_t
1691 lcs_portno_show (struct device *dev, char *buf)
1692 {
1693         struct lcs_card *card;
1694
1695         card = (struct lcs_card *)dev->driver_data;
1696
1697         if (!card)
1698                 return 0;
1699
1700         return sprintf(buf, "%d\n", card->portno);
1701 }
1702
1703 /**
1704  * store the value which is piped to file portno
1705  */
1706 static ssize_t
1707 lcs_portno_store (struct device *dev, const char *buf, size_t count)
1708 {
1709         struct lcs_card *card;
1710         int value;
1711
1712         card = (struct lcs_card *)dev->driver_data;
1713
1714         if (!card)
1715                 return 0;
1716
1717         sscanf(buf, "%u", &value);
1718         /* TODO: sanity checks */
1719         card->portno = value;
1720
1721         return count;
1722
1723 }
1724
1725 static DEVICE_ATTR(portno, 0644, lcs_portno_show, lcs_portno_store);
1726
1727 static ssize_t
1728 lcs_type_show(struct device *dev, char *buf)
1729 {
1730         struct ccwgroup_device *cgdev;
1731
1732         cgdev = to_ccwgroupdev(dev);
1733         if (!cgdev)
1734                 return -ENODEV;
1735
1736         return sprintf(buf, "%s\n", cu3088_type[cgdev->cdev[0]->id.driver_info]);
1737 }
1738
1739 static DEVICE_ATTR(type, 0444, lcs_type_show, NULL);
1740
1741 static ssize_t
1742 lcs_timeout_show(struct device *dev, char *buf)
1743 {
1744         struct lcs_card *card;
1745
1746         card = (struct lcs_card *)dev->driver_data;
1747
1748         return card ? sprintf(buf, "%u\n", card->lancmd_timeout) : 0;
1749 }
1750
1751 static ssize_t
1752 lcs_timeout_store (struct device *dev, const char *buf, size_t count)
1753 {
1754         struct lcs_card *card;
1755         int value;
1756
1757         card = (struct lcs_card *)dev->driver_data;
1758
1759         if (!card)
1760                 return 0;
1761
1762         sscanf(buf, "%u", &value);
1763         /* TODO: sanity checks */
1764         card->lancmd_timeout = value;
1765
1766         return count;
1767
1768 }
1769
1770 DEVICE_ATTR(lancmd_timeout, 0644, lcs_timeout_show, lcs_timeout_store);
1771
1772 static struct attribute * lcs_attrs[] = {
1773         &dev_attr_portno.attr,
1774         &dev_attr_type.attr,
1775         &dev_attr_lancmd_timeout.attr,
1776         NULL,
1777 };
1778
1779 static struct attribute_group lcs_attr_group = {
1780         .attrs = lcs_attrs,
1781 };
1782
1783 /**
1784  * lcs_probe_device is called on establishing a new ccwgroup_device.
1785  */
1786 static int
1787 lcs_probe_device(struct ccwgroup_device *ccwgdev)
1788 {
1789         struct lcs_card *card;
1790         int ret;
1791
1792         if (!get_device(&ccwgdev->dev))
1793                 return -ENODEV;
1794
1795         LCS_DBF_TEXT(2, setup, "add_dev");
1796         card = lcs_alloc_card();
1797         if (!card) {
1798                 PRINT_ERR("Allocation of lcs card failed\n");
1799                 put_device(&ccwgdev->dev);
1800                 return -ENOMEM;
1801         }
1802         ret = sysfs_create_group(&ccwgdev->dev.kobj, &lcs_attr_group);
1803         if (ret) {
1804                 PRINT_ERR("Creating attributes failed");
1805                 lcs_free_card(card);
1806                 put_device(&ccwgdev->dev);
1807                 return ret;
1808         }
1809         ccwgdev->dev.driver_data = card;
1810         ccwgdev->cdev[0]->handler = lcs_irq;
1811         ccwgdev->cdev[1]->handler = lcs_irq;
1812         return 0;
1813 }
1814
1815 static int
1816 lcs_register_netdev(struct ccwgroup_device *ccwgdev)
1817 {
1818         struct lcs_card *card;
1819
1820         LCS_DBF_TEXT(2, setup, "regnetdv");
1821         card = (struct lcs_card *)ccwgdev->dev.driver_data;
1822         if (card->dev->reg_state != NETREG_UNINITIALIZED)
1823                 return 0;
1824         SET_NETDEV_DEV(card->dev, &ccwgdev->dev);
1825         return register_netdev(card->dev);
1826 }
1827
1828 /**
1829  * lcs_new_device will be called by setting the group device online.
1830  */
1831
1832 static int
1833 lcs_new_device(struct ccwgroup_device *ccwgdev)
1834 {
1835         struct  lcs_card *card;
1836         struct net_device *dev=NULL;
1837         enum lcs_dev_states recover_state;
1838         int rc;
1839
1840         card = (struct lcs_card *)ccwgdev->dev.driver_data;
1841         if (!card)
1842                 return -ENODEV;
1843
1844         LCS_DBF_TEXT(2, setup, "newdev");
1845         LCS_DBF_HEX(3, setup, &card, sizeof(void*));
1846         card->read.ccwdev  = ccwgdev->cdev[0];
1847         card->write.ccwdev = ccwgdev->cdev[1];
1848
1849         recover_state = card->state;
1850         ccw_device_set_online(card->read.ccwdev);
1851         ccw_device_set_online(card->write.ccwdev);
1852
1853         LCS_DBF_TEXT(3, setup, "lcsnewdv");
1854
1855         lcs_setup_card(card);
1856         rc = lcs_detect(card);
1857         if (rc) {
1858                 lcs_stopcard(card);
1859                 lcs_cleanup_card(card);
1860                 goto out;
1861         }
1862         if (card->dev) {
1863                 LCS_DBF_TEXT(2, setup, "samedev");
1864                 LCS_DBF_HEX(3, setup, &card, sizeof(void*));
1865                 goto netdev_out;
1866         }
1867         switch (card->lan_type) {
1868 #ifdef CONFIG_NET_ETHERNET
1869         case LCS_FRAME_TYPE_ENET:
1870                 card->lan_type_trans = eth_type_trans;
1871                 dev = alloc_etherdev(0);
1872                 break;
1873 #endif
1874 #ifdef CONFIG_TR
1875         case LCS_FRAME_TYPE_TR:
1876                 card->lan_type_trans = tr_type_trans;
1877                 dev = alloc_trdev(0);
1878                 break;
1879 #endif
1880 #ifdef CONFIG_FDDI
1881         case LCS_FRAME_TYPE_FDDI:
1882                 card->lan_type_trans = fddi_type_trans;
1883                 dev = alloc_fddidev(0);
1884                 break;
1885 #endif
1886         default:
1887                 LCS_DBF_TEXT(3, setup, "errinit");
1888                 PRINT_ERR("LCS: Initialization failed\n");
1889                 PRINT_ERR("LCS: No device found!\n");
1890                 goto out;
1891         }
1892         if (!dev)
1893                 goto out;
1894         card->dev = dev;
1895 netdev_out:
1896         card->dev->priv = card;
1897         card->dev->open = lcs_open_device;
1898         card->dev->stop = lcs_stop_device;
1899         card->dev->hard_start_xmit = lcs_start_xmit;
1900         card->dev->get_stats = lcs_getstats;
1901         SET_MODULE_OWNER(dev);
1902         if (lcs_register_netdev(ccwgdev) != 0)
1903                 goto out;
1904         memcpy(card->dev->dev_addr, card->mac, LCS_MAC_LENGTH);
1905 #ifdef CONFIG_IP_MULTICAST
1906         if (lcs_check_multicast_support(card))
1907                 card->dev->set_multicast_list = lcs_set_multicast_list;
1908 #endif
1909         netif_stop_queue(card->dev);
1910         if (recover_state == DEV_STATE_RECOVER) {
1911                 card->dev->flags |= IFF_UP;
1912                 netif_wake_queue(card->dev);
1913                 card->state = DEV_STATE_UP;
1914         } else
1915                 lcs_stopcard(card);
1916
1917         return 0;
1918 out:
1919
1920         ccw_device_set_offline(card->read.ccwdev);
1921         ccw_device_set_offline(card->write.ccwdev);
1922         lcs_cleanup_card(card);
1923         return -ENODEV;
1924 }
1925
1926 /**
1927  * lcs_shutdown_device, called when setting the group device offline.
1928  */
1929 static int
1930 lcs_shutdown_device(struct ccwgroup_device *ccwgdev)
1931 {
1932         struct lcs_card *card;
1933         enum lcs_dev_states recover_state;
1934         int ret;
1935
1936         LCS_DBF_TEXT(3, setup, "shtdndev");
1937         card = (struct lcs_card *)ccwgdev->dev.driver_data;
1938         if (!card)
1939                 return -ENODEV;
1940
1941         LCS_DBF_HEX(3, setup, &card, sizeof(void*));
1942         recover_state = card->state;
1943
1944         ret = lcs_stop_device(card->dev);
1945         ret = ccw_device_set_offline(card->read.ccwdev);
1946         ret = ccw_device_set_offline(card->write.ccwdev);
1947         if (recover_state == DEV_STATE_UP) {
1948                 card->state = DEV_STATE_RECOVER;
1949         }
1950         if (ret)
1951                 return ret;
1952         return 0;
1953 }
1954
1955 /**
1956  * lcs_remove_device, free buffers and card
1957  */
1958 static void
1959 lcs_remove_device(struct ccwgroup_device *ccwgdev)
1960 {
1961         struct lcs_card *card;
1962
1963         card = (struct lcs_card *)ccwgdev->dev.driver_data;
1964         if (!card)
1965                 return;
1966
1967         PRINT_INFO("Removing lcs group device ....\n");
1968         LCS_DBF_TEXT(3, setup, "remdev");
1969         LCS_DBF_HEX(3, setup, &card, sizeof(void*));
1970         if (ccwgdev->state == CCWGROUP_ONLINE) {
1971                 lcs_shutdown_device(ccwgdev);
1972         }
1973         if (card->dev)
1974                 unregister_netdev(card->dev);
1975         sysfs_remove_group(&ccwgdev->dev.kobj, &lcs_attr_group);
1976         lcs_cleanup_card(card);
1977         lcs_free_card(card);
1978         put_device(&ccwgdev->dev);
1979 }
1980
1981 /**
1982  * LCS ccwgroup driver registration
1983  */
1984 static struct ccwgroup_driver lcs_group_driver = {
1985         .owner       = THIS_MODULE,
1986         .name        = "lcs",
1987         .max_slaves  = 2,
1988         .driver_id   = 0xD3C3E2,
1989         .probe       = lcs_probe_device,
1990         .remove      = lcs_remove_device,
1991         .set_online  = lcs_new_device,
1992         .set_offline = lcs_shutdown_device,
1993 };
1994
1995 /**
1996  *  LCS Module/Kernel initialization function
1997  */
1998 static int
1999 __init lcs_init_module(void)
2000 {
2001         int rc;
2002
2003         PRINT_INFO("Loading %s\n",version);
2004         rc = lcs_register_debug_facility();
2005         LCS_DBF_TEXT(0, setup, "lcsinit");
2006         if (rc) {
2007                 PRINT_ERR("Initialization failed\n");
2008                 return rc;
2009         }
2010
2011         rc = register_cu3088_discipline(&lcs_group_driver);
2012         if (rc) {
2013                 PRINT_ERR("Initialization failed\n");
2014                 return rc;
2015         }
2016
2017         return 0;
2018 }
2019
2020
2021 /**
2022  *  LCS module cleanup function
2023  */
2024 static void
2025 __exit lcs_cleanup_module(void)
2026 {
2027         PRINT_INFO("Terminating lcs module.\n");
2028         LCS_DBF_TEXT(0, trace, "cleanup");
2029         unregister_cu3088_discipline(&lcs_group_driver);
2030         lcs_unregister_debug_facility();
2031 }
2032
2033 module_init(lcs_init_module);
2034 module_exit(lcs_cleanup_module);
2035
2036 MODULE_AUTHOR("Frank Pavlic <pavlic@de.ibm.com>");
2037 MODULE_LICENSE("GPL");
2038