drivers/s390/net/qeth_core_main.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *    Copyright IBM Corp. 2007, 2009
   4  *    Author(s): Utz Bacher <[email protected]>,
   5  *               Frank Pavlic <[email protected]>,
   6  *               Thomas Spatzier <[email protected]>,
   7  *               Frank Blaschka <[email protected]>
   8  */
   9
  10 #define KMSG_COMPONENT "qeth"
  11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  12
  13 #include <linux/compat.h>
  14 #include <linux/module.h>
  15 #include <linux/moduleparam.h>
  16 #include <linux/string.h>
  17 #include <linux/errno.h>
  18 #include <linux/kernel.h>
  19 #include <linux/log2.h>
  20 #include <linux/ip.h>
  21 #include <linux/tcp.h>
  22 #include <linux/mii.h>
  23 #include <linux/kthread.h>
  24 #include <linux/slab.h>
  25 #include <linux/if_vlan.h>
  26 #include <linux/netdevice.h>
  27 #include <linux/netdev_features.h>
  28 #include <linux/skbuff.h>
  29 #include <linux/vmalloc.h>
  30
  31 #include <net/iucv/af_iucv.h>
  32 #include <net/dsfield.h>
  33
  34 #include <asm/ebcdic.h>
  35 #include <asm/chpid.h>
  36 #include <asm/io.h>
  37 #include <asm/sysinfo.h>
  38 #include <asm/diag.h>
  39 #include <asm/cio.h>
  40 #include <asm/ccwdev.h>
  41 #include <asm/cpcmd.h>
  42
  43 #include "qeth_core.h"
  44
  45 struct qeth_dbf_info qeth_dbf[QETH_DBF_INFOS] = {
  46         /* define dbf - Name, Pages, Areas, Maxlen, Level, View, Handle */
  47         /*                   N  P  A    M  L  V                      H  */
  48         [QETH_DBF_SETUP] = {"qeth_setup",
  49                                 8, 1,   8, 5, &debug_hex_ascii_view, NULL},
  50         [QETH_DBF_MSG]   = {"qeth_msg", 8, 1, 11 * sizeof(long), 3,
  51                             &debug_sprintf_view, NULL},
  52         [QETH_DBF_CTRL]  = {"qeth_control",
  53                 8, 1, QETH_DBF_CTRL_LEN, 5, &debug_hex_ascii_view, NULL},
  54 };
  55 EXPORT_SYMBOL_GPL(qeth_dbf);
  56
  57 struct kmem_cache *qeth_core_header_cache;
  58 EXPORT_SYMBOL_GPL(qeth_core_header_cache);
  59 static struct kmem_cache *qeth_qdio_outbuf_cache;
  60
  61 static struct device *qeth_core_root_dev;
  62 static struct lock_class_key qdio_out_skb_queue_key;
  63
  64 static void qeth_issue_next_read_cb(struct qeth_card *card,
  65                                     struct qeth_channel *channel,
  66                                     struct qeth_cmd_buffer *iob);
  67 static struct qeth_cmd_buffer *qeth_get_buffer(struct qeth_channel *);
  68 static void qeth_free_buffer_pool(struct qeth_card *);
  69 static int qeth_qdio_establish(struct qeth_card *);
  70 static void qeth_free_qdio_queues(struct qeth_card *card);
  71 static void qeth_notify_skbs(struct qeth_qdio_out_q *queue,
  72                 struct qeth_qdio_out_buffer *buf,
  73                 enum iucv_tx_notify notification);
  74 static void qeth_release_skbs(struct qeth_qdio_out_buffer *buf);
  75 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *, int);
  76
  77 static void qeth_close_dev_handler(struct work_struct *work)
  78 {
  79         struct qeth_card *card;
  80
  81         card = container_of(work, struct qeth_card, close_dev_work);
  82         QETH_CARD_TEXT(card, 2, "cldevhdl");
  83         ccwgroup_set_offline(card->gdev);
  84 }
  85
  86 static const char *qeth_get_cardname(struct qeth_card *card)
  87 {
  88         if (IS_VM_NIC(card)) {
  89                 switch (card->info.type) {
  90                 case QETH_CARD_TYPE_OSD:
  91                         return " Virtual NIC QDIO";
  92                 case QETH_CARD_TYPE_IQD:
  93                         return " Virtual NIC Hiper";
  94                 case QETH_CARD_TYPE_OSM:
  95                         return " Virtual NIC QDIO - OSM";
  96                 case QETH_CARD_TYPE_OSX:
  97                         return " Virtual NIC QDIO - OSX";
  98                 default:
  99                         return " unknown";
 100                 }
 101         } else {
 102                 switch (card->info.type) {
 103                 case QETH_CARD_TYPE_OSD:
 104                         return " OSD Express";
 105                 case QETH_CARD_TYPE_IQD:
 106                         return " HiperSockets";
 107                 case QETH_CARD_TYPE_OSN:
 108                         return " OSN QDIO";
 109                 case QETH_CARD_TYPE_OSM:
 110                         return " OSM QDIO";
 111                 case QETH_CARD_TYPE_OSX:
 112                         return " OSX QDIO";
 113                 default:
 114                         return " unknown";
 115                 }
 116         }
 117         return " n/a";
 118 }
 119
 120 /* max length to be returned: 14 */
 121 const char *qeth_get_cardname_short(struct qeth_card *card)
 122 {
 123         if (IS_VM_NIC(card)) {
 124                 switch (card->info.type) {
 125                 case QETH_CARD_TYPE_OSD:
 126                         return "Virt.NIC QDIO";
 127                 case QETH_CARD_TYPE_IQD:
 128                         return "Virt.NIC Hiper";
 129                 case QETH_CARD_TYPE_OSM:
 130                         return "Virt.NIC OSM";
 131                 case QETH_CARD_TYPE_OSX:
 132                         return "Virt.NIC OSX";
 133                 default:
 134                         return "unknown";
 135                 }
 136         } else {
 137                 switch (card->info.type) {
 138                 case QETH_CARD_TYPE_OSD:
 139                         switch (card->info.link_type) {
 140                         case QETH_LINK_TYPE_FAST_ETH:
 141                                 return "OSD_100";
 142                         case QETH_LINK_TYPE_HSTR:
 143                                 return "HSTR";
 144                         case QETH_LINK_TYPE_GBIT_ETH:
 145                                 return "OSD_1000";
 146                         case QETH_LINK_TYPE_10GBIT_ETH:
 147                                 return "OSD_10GIG";
 148                         case QETH_LINK_TYPE_25GBIT_ETH:
 149                                 return "OSD_25GIG";
 150                         case QETH_LINK_TYPE_LANE_ETH100:
 151                                 return "OSD_FE_LANE";
 152                         case QETH_LINK_TYPE_LANE_TR:
 153                                 return "OSD_TR_LANE";
 154                         case QETH_LINK_TYPE_LANE_ETH1000:
 155                                 return "OSD_GbE_LANE";
 156                         case QETH_LINK_TYPE_LANE:
 157                                 return "OSD_ATM_LANE";
 158                         default:
 159                                 return "OSD_Express";
 160                         }
 161                 case QETH_CARD_TYPE_IQD:
 162                         return "HiperSockets";
 163                 case QETH_CARD_TYPE_OSN:
 164                         return "OSN";
 165                 case QETH_CARD_TYPE_OSM:
 166                         return "OSM_1000";
 167                 case QETH_CARD_TYPE_OSX:
 168                         return "OSX_10GIG";
 169                 default:
 170                         return "unknown";
 171                 }
 172         }
 173         return "n/a";
 174 }
 175
 176 void qeth_set_allowed_threads(struct qeth_card *card, unsigned long threads,
 177                          int clear_start_mask)
 178 {
 179         unsigned long flags;
 180
 181         spin_lock_irqsave(&card->thread_mask_lock, flags);
 182         card->thread_allowed_mask = threads;
 183         if (clear_start_mask)
 184                 card->thread_start_mask &= threads;
 185         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 186         wake_up(&card->wait_q);
 187 }
 188 EXPORT_SYMBOL_GPL(qeth_set_allowed_threads);
 189
 190 int qeth_threads_running(struct qeth_card *card, unsigned long threads)
 191 {
 192         unsigned long flags;
 193         int rc = 0;
 194
 195         spin_lock_irqsave(&card->thread_mask_lock, flags);
 196         rc = (card->thread_running_mask & threads);
 197         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 198         return rc;
 199 }
 200 EXPORT_SYMBOL_GPL(qeth_threads_running);
 201
 202 void qeth_clear_working_pool_list(struct qeth_card *card)
 203 {
 204         struct qeth_buffer_pool_entry *pool_entry, *tmp;
 205
 206         QETH_CARD_TEXT(card, 5, "clwrklst");
 207         list_for_each_entry_safe(pool_entry, tmp,
 208                             &card->qdio.in_buf_pool.entry_list, list){
 209                         list_del(&pool_entry->list);
 210         }
 211 }
 212 EXPORT_SYMBOL_GPL(qeth_clear_working_pool_list);
 213
 214 static int qeth_alloc_buffer_pool(struct qeth_card *card)
 215 {
 216         struct qeth_buffer_pool_entry *pool_entry;
 217         void *ptr;
 218         int i, j;
 219
 220         QETH_CARD_TEXT(card, 5, "alocpool");
 221         for (i = 0; i < card->qdio.init_pool.buf_count; ++i) {
 222                 pool_entry = kzalloc(sizeof(*pool_entry), GFP_KERNEL);
 223                 if (!pool_entry) {
 224                         qeth_free_buffer_pool(card);
 225                         return -ENOMEM;
 226                 }
 227                 for (j = 0; j < QETH_MAX_BUFFER_ELEMENTS(card); ++j) {
 228                         ptr = (void *) __get_free_page(GFP_KERNEL);
 229                         if (!ptr) {
 230                                 while (j > 0)
 231                                         free_page((unsigned long)
 232                                                   pool_entry->elements[--j]);
 233                                 kfree(pool_entry);
 234                                 qeth_free_buffer_pool(card);
 235                                 return -ENOMEM;
 236                         }
 237                         pool_entry->elements[j] = ptr;
 238                 }
 239                 list_add(&pool_entry->init_list,
 240                          &card->qdio.init_pool.entry_list);
 241         }
 242         return 0;
 243 }
 244
 245 int qeth_realloc_buffer_pool(struct qeth_card *card, int bufcnt)
 246 {
 247         QETH_CARD_TEXT(card, 2, "realcbp");
 248
 249         if (card->state != CARD_STATE_DOWN)
 250                 return -EPERM;
 251
 252         /* TODO: steel/add buffers from/to a running card's buffer pool (?) */
 253         qeth_clear_working_pool_list(card);
 254         qeth_free_buffer_pool(card);
 255         card->qdio.in_buf_pool.buf_count = bufcnt;
 256         card->qdio.init_pool.buf_count = bufcnt;
 257         return qeth_alloc_buffer_pool(card);
 258 }
 259 EXPORT_SYMBOL_GPL(qeth_realloc_buffer_pool);
 260
 261 static void qeth_free_qdio_queue(struct qeth_qdio_q *q)
 262 {
 263         if (!q)
 264                 return;
 265
 266         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
 267         kfree(q);
 268 }
 269
 270 static struct qeth_qdio_q *qeth_alloc_qdio_queue(void)
 271 {
 272         struct qeth_qdio_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
 273         int i;
 274
 275         if (!q)
 276                 return NULL;
 277
 278         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
 279                 kfree(q);
 280                 return NULL;
 281         }
 282
 283         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i)
 284                 q->bufs[i].buffer = q->qdio_bufs[i];
 285
 286         QETH_DBF_HEX(SETUP, 2, &q, sizeof(void *));
 287         return q;
 288 }
 289
 290 static int qeth_cq_init(struct qeth_card *card)
 291 {
 292         int rc;
 293
 294         if (card->options.cq == QETH_CQ_ENABLED) {
 295                 QETH_DBF_TEXT(SETUP, 2, "cqinit");
 296                 qdio_reset_buffers(card->qdio.c_q->qdio_bufs,
 297                                    QDIO_MAX_BUFFERS_PER_Q);
 298                 card->qdio.c_q->next_buf_to_init = 127;
 299                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT,
 300                              card->qdio.no_in_queues - 1, 0,
 301                              127);
 302                 if (rc) {
 303                         QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 304                         goto out;
 305                 }
 306         }
 307         rc = 0;
 308 out:
 309         return rc;
 310 }
 311
 312 static int qeth_alloc_cq(struct qeth_card *card)
 313 {
 314         int rc;
 315
 316         if (card->options.cq == QETH_CQ_ENABLED) {
 317                 int i;
 318                 struct qdio_outbuf_state *outbuf_states;
 319
 320                 QETH_DBF_TEXT(SETUP, 2, "cqon");
 321                 card->qdio.c_q = qeth_alloc_qdio_queue();
 322                 if (!card->qdio.c_q) {
 323                         rc = -1;
 324                         goto kmsg_out;
 325                 }
 326                 card->qdio.no_in_queues = 2;
 327                 card->qdio.out_bufstates =
 328                         kcalloc(card->qdio.no_out_queues *
 329                                         QDIO_MAX_BUFFERS_PER_Q,
 330                                 sizeof(struct qdio_outbuf_state),
 331                                 GFP_KERNEL);
 332                 outbuf_states = card->qdio.out_bufstates;
 333                 if (outbuf_states == NULL) {
 334                         rc = -1;
 335                         goto free_cq_out;
 336                 }
 337                 for (i = 0; i < card->qdio.no_out_queues; ++i) {
 338                         card->qdio.out_qs[i]->bufstates = outbuf_states;
 339                         outbuf_states += QDIO_MAX_BUFFERS_PER_Q;
 340                 }
 341         } else {
 342                 QETH_DBF_TEXT(SETUP, 2, "nocq");
 343                 card->qdio.c_q = NULL;
 344                 card->qdio.no_in_queues = 1;
 345         }
 346         QETH_DBF_TEXT_(SETUP, 2, "iqc%d", card->qdio.no_in_queues);
 347         rc = 0;
 348 out:
 349         return rc;
 350 free_cq_out:
 351         qeth_free_qdio_queue(card->qdio.c_q);
 352         card->qdio.c_q = NULL;
 353 kmsg_out:
 354         dev_err(&card->gdev->dev, "Failed to create completion queue\n");
 355         goto out;
 356 }
 357
 358 static void qeth_free_cq(struct qeth_card *card)
 359 {
 360         if (card->qdio.c_q) {
 361                 --card->qdio.no_in_queues;
 362                 qeth_free_qdio_queue(card->qdio.c_q);
 363                 card->qdio.c_q = NULL;
 364         }
 365         kfree(card->qdio.out_bufstates);
 366         card->qdio.out_bufstates = NULL;
 367 }
 368
 369 static enum iucv_tx_notify qeth_compute_cq_notification(int sbalf15,
 370                                                         int delayed)
 371 {
 372         enum iucv_tx_notify n;
 373
 374         switch (sbalf15) {
 375         case 0:
 376                 n = delayed ? TX_NOTIFY_DELAYED_OK : TX_NOTIFY_OK;
 377                 break;
 378         case 4:
 379         case 16:
 380         case 17:
 381         case 18:
 382                 n = delayed ? TX_NOTIFY_DELAYED_UNREACHABLE :
 383                         TX_NOTIFY_UNREACHABLE;
 384                 break;
 385         default:
 386                 n = delayed ? TX_NOTIFY_DELAYED_GENERALERROR :
 387                         TX_NOTIFY_GENERALERROR;
 388                 break;
 389         }
 390
 391         return n;
 392 }
 393
 394 static void qeth_cleanup_handled_pending(struct qeth_qdio_out_q *q, int bidx,
 395                                          int forced_cleanup)
 396 {
 397         if (q->card->options.cq != QETH_CQ_ENABLED)
 398                 return;
 399
 400         if (q->bufs[bidx]->next_pending != NULL) {
 401                 struct qeth_qdio_out_buffer *head = q->bufs[bidx];
 402                 struct qeth_qdio_out_buffer *c = q->bufs[bidx]->next_pending;
 403
 404                 while (c) {
 405                         if (forced_cleanup ||
 406                             atomic_read(&c->state) ==
 407                               QETH_QDIO_BUF_HANDLED_DELAYED) {
 408                                 struct qeth_qdio_out_buffer *f = c;
 409                                 QETH_CARD_TEXT(f->q->card, 5, "fp");
 410                                 QETH_CARD_TEXT_(f->q->card, 5, "%lx", (long) f);
 411                                 /* release here to avoid interleaving between
 412                                    outbound tasklet and inbound tasklet
 413                                    regarding notifications and lifecycle */
 414                                 qeth_release_skbs(c);
 415
 416                                 c = f->next_pending;
 417                                 WARN_ON_ONCE(head->next_pending != f);
 418                                 head->next_pending = c;
 419                                 kmem_cache_free(qeth_qdio_outbuf_cache, f);
 420                         } else {
 421                                 head = c;
 422                                 c = c->next_pending;
 423                         }
 424
 425                 }
 426         }
 427         if (forced_cleanup && (atomic_read(&(q->bufs[bidx]->state)) ==
 428                                         QETH_QDIO_BUF_HANDLED_DELAYED)) {
 429                 /* for recovery situations */
 430                 qeth_init_qdio_out_buf(q, bidx);
 431                 QETH_CARD_TEXT(q->card, 2, "clprecov");
 432         }
 433 }
 434
 435
 436 static void qeth_qdio_handle_aob(struct qeth_card *card,
 437                                  unsigned long phys_aob_addr)
 438 {
 439         struct qaob *aob;
 440         struct qeth_qdio_out_buffer *buffer;
 441         enum iucv_tx_notify notification;
 442         unsigned int i;
 443
 444         aob = (struct qaob *) phys_to_virt(phys_aob_addr);
 445         QETH_CARD_TEXT(card, 5, "haob");
 446         QETH_CARD_TEXT_(card, 5, "%lx", phys_aob_addr);
 447         buffer = (struct qeth_qdio_out_buffer *) aob->user1;
 448         QETH_CARD_TEXT_(card, 5, "%lx", aob->user1);
 449
 450         if (atomic_cmpxchg(&buffer->state, QETH_QDIO_BUF_PRIMED,
 451                            QETH_QDIO_BUF_IN_CQ) == QETH_QDIO_BUF_PRIMED) {
 452                 notification = TX_NOTIFY_OK;
 453         } else {
 454                 WARN_ON_ONCE(atomic_read(&buffer->state) !=
 455                                                         QETH_QDIO_BUF_PENDING);
 456                 atomic_set(&buffer->state, QETH_QDIO_BUF_IN_CQ);
 457                 notification = TX_NOTIFY_DELAYED_OK;
 458         }
 459
 460         if (aob->aorc != 0)  {
 461                 QETH_CARD_TEXT_(card, 2, "aorc%02X", aob->aorc);
 462                 notification = qeth_compute_cq_notification(aob->aorc, 1);
 463         }
 464         qeth_notify_skbs(buffer->q, buffer, notification);
 465
 466         /* Free dangling allocations. The attached skbs are handled by
 467          * qeth_cleanup_handled_pending().
 468          */
 469         for (i = 0;
 470              i < aob->sb_count && i < QETH_MAX_BUFFER_ELEMENTS(card);
 471              i++) {
 472                 if (aob->sba[i] && buffer->is_header[i])
 473                         kmem_cache_free(qeth_core_header_cache,
 474                                         (void *) aob->sba[i]);
 475         }
 476         atomic_set(&buffer->state, QETH_QDIO_BUF_HANDLED_DELAYED);
 477
 478         qdio_release_aob(aob);
 479 }
 480
 481 static inline int qeth_is_cq(struct qeth_card *card, unsigned int queue)
 482 {
 483         return card->options.cq == QETH_CQ_ENABLED &&
 484             card->qdio.c_q != NULL &&
 485             queue != 0 &&
 486             queue == card->qdio.no_in_queues - 1;
 487 }
 488
 489 static void qeth_setup_ccw(struct ccw1 *ccw, u8 cmd_code, u32 len, void *data)
 490 {
 491         ccw->cmd_code = cmd_code;
 492         ccw->flags = CCW_FLAG_SLI;
 493         ccw->count = len;
 494         ccw->cda = (__u32) __pa(data);
 495 }
 496
 497 static int __qeth_issue_next_read(struct qeth_card *card)
 498 {
 499         struct qeth_channel *channel = &card->read;
 500         struct qeth_cmd_buffer *iob;
 501         int rc;
 502
 503         QETH_CARD_TEXT(card, 5, "issnxrd");
 504         if (channel->state != CH_STATE_UP)
 505                 return -EIO;
 506         iob = qeth_get_buffer(channel);
 507         if (!iob) {
 508                 dev_warn(&card->gdev->dev, "The qeth device driver "
 509                         "failed to recover an error on the device\n");
 510                 QETH_DBF_MESSAGE(2, "issue_next_read on device %x failed: no iob available\n",
 511                                  CARD_DEVID(card));
 512                 return -ENOMEM;
 513         }
 514
 515         qeth_setup_ccw(channel->ccw, CCW_CMD_READ, QETH_BUFSIZE, iob->data);
 516         iob->callback = qeth_issue_next_read_cb;
 517         QETH_CARD_TEXT(card, 6, "noirqpnd");
 518         rc = ccw_device_start(channel->ccwdev, channel->ccw,
 519                               (addr_t) iob, 0, 0);
 520         if (rc) {
 521                 QETH_DBF_MESSAGE(2, "error %i on device %x when starting next read ccw!\n",
 522                                  rc, CARD_DEVID(card));
 523                 atomic_set(&channel->irq_pending, 0);
 524                 qeth_release_buffer(channel, iob);
 525                 card->read_or_write_problem = 1;
 526                 qeth_schedule_recovery(card);
 527                 wake_up(&card->wait_q);
 528         }
 529         return rc;
 530 }
 531
 532 static int qeth_issue_next_read(struct qeth_card *card)
 533 {
 534         int ret;
 535
 536         spin_lock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 537         ret = __qeth_issue_next_read(card);
 538         spin_unlock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 539
 540         return ret;
 541 }
 542
 543 static struct qeth_reply *qeth_alloc_reply(struct qeth_card *card)
 544 {
 545         struct qeth_reply *reply;
 546
 547         reply = kzalloc(sizeof(*reply), GFP_KERNEL);
 548         if (reply) {
 549                 refcount_set(&reply->refcnt, 1);
 550                 init_completion(&reply->received);
 551         }
 552         return reply;
 553 }
 554
 555 static void qeth_get_reply(struct qeth_reply *reply)
 556 {
 557         refcount_inc(&reply->refcnt);
 558 }
 559
 560 static void qeth_put_reply(struct qeth_reply *reply)
 561 {
 562         if (refcount_dec_and_test(&reply->refcnt))
 563                 kfree(reply);
 564 }
 565
 566 static void qeth_enqueue_reply(struct qeth_card *card, struct qeth_reply *reply)
 567 {
 568         spin_lock_irq(&card->lock);
 569         list_add_tail(&reply->list, &card->cmd_waiter_list);
 570         spin_unlock_irq(&card->lock);
 571 }
 572
 573 static void qeth_dequeue_reply(struct qeth_card *card, struct qeth_reply *reply)
 574 {
 575         spin_lock_irq(&card->lock);
 576         list_del(&reply->list);
 577         spin_unlock_irq(&card->lock);
 578 }
 579
 580 static void qeth_notify_reply(struct qeth_reply *reply, int reason)
 581 {
 582         reply->rc = reason;
 583         complete(&reply->received);
 584 }
 585
 586 static void qeth_issue_ipa_msg(struct qeth_ipa_cmd *cmd, int rc,
 587                 struct qeth_card *card)
 588 {
 589         const char *ipa_name;
 590         int com = cmd->hdr.command;
 591         ipa_name = qeth_get_ipa_cmd_name(com);
 592
 593         if (rc)
 594                 QETH_DBF_MESSAGE(2, "IPA: %s(%#x) for device %x returned %#x \"%s\"\n",
 595                                  ipa_name, com, CARD_DEVID(card), rc,
 596                                  qeth_get_ipa_msg(rc));
 597         else
 598                 QETH_DBF_MESSAGE(5, "IPA: %s(%#x) for device %x succeeded\n",
 599                                  ipa_name, com, CARD_DEVID(card));
 600 }
 601
 602 static struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card,
 603                                                 struct qeth_ipa_cmd *cmd)
 604 {
 605         QETH_CARD_TEXT(card, 5, "chkipad");
 606
 607         if (IS_IPA_REPLY(cmd)) {
 608                 if (cmd->hdr.command != IPA_CMD_SETCCID &&
 609                     cmd->hdr.command != IPA_CMD_DELCCID &&
 610                     cmd->hdr.command != IPA_CMD_MODCCID &&
 611                     cmd->hdr.command != IPA_CMD_SET_DIAG_ASS)
 612                         qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
 613                 return cmd;
 614         }
 615
 616         /* handle unsolicited event: */
 617         switch (cmd->hdr.command) {
 618         case IPA_CMD_STOPLAN:
 619                 if (cmd->hdr.return_code == IPA_RC_VEPA_TO_VEB_TRANSITION) {
 620                         dev_err(&card->gdev->dev,
 621                                 "Interface %s is down because the adjacent port is no longer in reflective relay mode\n",
 622                                 QETH_CARD_IFNAME(card));
 623                         schedule_work(&card->close_dev_work);
 624                 } else {
 625                         dev_warn(&card->gdev->dev,
 626                                  "The link for interface %s on CHPID 0x%X failed\n",
 627                                  QETH_CARD_IFNAME(card), card->info.chpid);
 628                         qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
 629                         netif_carrier_off(card->dev);
 630                 }
 631                 return NULL;
 632         case IPA_CMD_STARTLAN:
 633                 dev_info(&card->gdev->dev,
 634                          "The link for %s on CHPID 0x%X has been restored\n",
 635                          QETH_CARD_IFNAME(card), card->info.chpid);
 636                 if (card->info.hwtrap)
 637                         card->info.hwtrap = 2;
 638                 qeth_schedule_recovery(card);
 639                 return NULL;
 640         case IPA_CMD_SETBRIDGEPORT_IQD:
 641         case IPA_CMD_SETBRIDGEPORT_OSA:
 642         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
 643                 if (card->discipline->control_event_handler(card, cmd))
 644                         return cmd;
 645                 return NULL;
 646         case IPA_CMD_MODCCID:
 647                 return cmd;
 648         case IPA_CMD_REGISTER_LOCAL_ADDR:
 649                 QETH_CARD_TEXT(card, 3, "irla");
 650                 return NULL;
 651         case IPA_CMD_UNREGISTER_LOCAL_ADDR:
 652                 QETH_CARD_TEXT(card, 3, "urla");
 653                 return NULL;
 654         default:
 655                 QETH_DBF_MESSAGE(2, "Received data is IPA but not a reply!\n");
 656                 return cmd;
 657         }
 658 }
 659
 660 void qeth_clear_ipacmd_list(struct qeth_card *card)
 661 {
 662         struct qeth_reply *reply;
 663         unsigned long flags;
 664
 665         QETH_CARD_TEXT(card, 4, "clipalst");
 666
 667         spin_lock_irqsave(&card->lock, flags);
 668         list_for_each_entry(reply, &card->cmd_waiter_list, list)
 669                 qeth_notify_reply(reply, -EIO);
 670         spin_unlock_irqrestore(&card->lock, flags);
 671 }
 672 EXPORT_SYMBOL_GPL(qeth_clear_ipacmd_list);
 673
 674 static int qeth_check_idx_response(struct qeth_card *card,
 675         unsigned char *buffer)
 676 {
 677         QETH_DBF_HEX(CTRL, 2, buffer, QETH_DBF_CTRL_LEN);
 678         if ((buffer[2] & 0xc0) == 0xc0) {
 679                 QETH_DBF_MESSAGE(2, "received an IDX TERMINATE with cause code %#04x\n",
 680                                  buffer[4]);
 681                 QETH_CARD_TEXT(card, 2, "ckidxres");
 682                 QETH_CARD_TEXT(card, 2, " idxterm");
 683                 QETH_CARD_TEXT_(card, 2, "  rc%d", -EIO);
 684                 if (buffer[4] == 0xf6) {
 685                         dev_err(&card->gdev->dev,
 686                         "The qeth device is not configured "
 687                         "for the OSI layer required by z/VM\n");
 688                         return -EPERM;
 689                 }
 690                 return -EIO;
 691         }
 692         return 0;
 693 }
 694
 695 static struct qeth_cmd_buffer *__qeth_get_buffer(struct qeth_channel *channel)
 696 {
 697         __u8 index;
 698
 699         index = channel->io_buf_no;
 700         do {
 701                 if (channel->iob[index].state == BUF_STATE_FREE) {
 702                         channel->iob[index].state = BUF_STATE_LOCKED;
 703                         channel->iob[index].timeout = QETH_TIMEOUT;
 704                         channel->io_buf_no = (channel->io_buf_no + 1) %
 705                                 QETH_CMD_BUFFER_NO;
 706                         memset(channel->iob[index].data, 0, QETH_BUFSIZE);
 707                         return channel->iob + index;
 708                 }
 709                 index = (index + 1) % QETH_CMD_BUFFER_NO;
 710         } while (index != channel->io_buf_no);
 711
 712         return NULL;
 713 }
 714
 715 void qeth_release_buffer(struct qeth_channel *channel,
 716                 struct qeth_cmd_buffer *iob)
 717 {
 718         unsigned long flags;
 719
 720         spin_lock_irqsave(&channel->iob_lock, flags);
 721         iob->state = BUF_STATE_FREE;
 722         iob->callback = NULL;
 723         if (iob->reply) {
 724                 qeth_put_reply(iob->reply);
 725                 iob->reply = NULL;
 726         }
 727         spin_unlock_irqrestore(&channel->iob_lock, flags);
 728         wake_up(&channel->wait_q);
 729 }
 730 EXPORT_SYMBOL_GPL(qeth_release_buffer);
 731
 732 static void qeth_release_buffer_cb(struct qeth_card *card,
 733                                    struct qeth_channel *channel,
 734                                    struct qeth_cmd_buffer *iob)
 735 {
 736         qeth_release_buffer(channel, iob);
 737 }
 738
 739 static void qeth_cancel_cmd(struct qeth_cmd_buffer *iob, int rc)
 740 {
 741         struct qeth_reply *reply = iob->reply;
 742
 743         if (reply)
 744                 qeth_notify_reply(reply, rc);
 745         qeth_release_buffer(iob->channel, iob);
 746 }
 747
 748 static struct qeth_cmd_buffer *qeth_get_buffer(struct qeth_channel *channel)
 749 {
 750         struct qeth_cmd_buffer *buffer = NULL;
 751         unsigned long flags;
 752
 753         spin_lock_irqsave(&channel->iob_lock, flags);
 754         buffer = __qeth_get_buffer(channel);
 755         spin_unlock_irqrestore(&channel->iob_lock, flags);
 756         return buffer;
 757 }
 758
 759 struct qeth_cmd_buffer *qeth_wait_for_buffer(struct qeth_channel *channel)
 760 {
 761         struct qeth_cmd_buffer *buffer;
 762         wait_event(channel->wait_q,
 763                    ((buffer = qeth_get_buffer(channel)) != NULL));
 764         return buffer;
 765 }
 766 EXPORT_SYMBOL_GPL(qeth_wait_for_buffer);
 767
 768 void qeth_clear_cmd_buffers(struct qeth_channel *channel)
 769 {
 770         int cnt;
 771
 772         for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++)
 773                 qeth_release_buffer(channel, &channel->iob[cnt]);
 774         channel->io_buf_no = 0;
 775 }
 776 EXPORT_SYMBOL_GPL(qeth_clear_cmd_buffers);
 777
 778 static void qeth_issue_next_read_cb(struct qeth_card *card,
 779                                     struct qeth_channel *channel,
 780                                     struct qeth_cmd_buffer *iob)
 781 {
 782         struct qeth_ipa_cmd *cmd = NULL;
 783         struct qeth_reply *reply = NULL;
 784         struct qeth_reply *r;
 785         unsigned long flags;
 786         int rc = 0;
 787
 788         QETH_CARD_TEXT(card, 4, "sndctlcb");
 789         rc = qeth_check_idx_response(card, iob->data);
 790         switch (rc) {
 791         case 0:
 792                 break;
 793         case -EIO:
 794                 qeth_clear_ipacmd_list(card);
 795                 qeth_schedule_recovery(card);
 796                 /* fall through */
 797         default:
 798                 goto out;
 799         }
 800
 801         if (IS_IPA(iob->data)) {
 802                 cmd = (struct qeth_ipa_cmd *) PDU_ENCAPSULATION(iob->data);
 803                 cmd = qeth_check_ipa_data(card, cmd);
 804                 if (!cmd)
 805                         goto out;
 806                 if (IS_OSN(card) && card->osn_info.assist_cb &&
 807                     cmd->hdr.command != IPA_CMD_STARTLAN) {
 808                         card->osn_info.assist_cb(card->dev, cmd);
 809                         goto out;
 810                 }
 811         } else {
 812                 /* non-IPA commands should only flow during initialization */
 813                 if (card->state != CARD_STATE_DOWN)
 814                         goto out;
 815         }
 816
 817         /* match against pending cmd requests */
 818         spin_lock_irqsave(&card->lock, flags);
 819         list_for_each_entry(r, &card->cmd_waiter_list, list) {
 820                 if ((r->seqno == QETH_IDX_COMMAND_SEQNO) ||
 821                     (cmd && (r->seqno == cmd->hdr.seqno))) {
 822                         reply = r;
 823                         /* take the object outside the lock */
 824                         qeth_get_reply(reply);
 825                         break;
 826                 }
 827         }
 828         spin_unlock_irqrestore(&card->lock, flags);
 829
 830         if (!reply)
 831                 goto out;
 832
 833         if (!reply->callback) {
 834                 rc = 0;
 835         } else {
 836                 if (cmd) {
 837                         reply->offset = (u16)((char *)cmd - (char *)iob->data);
 838                         rc = reply->callback(card, reply, (unsigned long)cmd);
 839                 } else {
 840                         rc = reply->callback(card, reply, (unsigned long)iob);
 841                 }
 842         }
 843
 844         if (rc <= 0)
 845                 qeth_notify_reply(reply, rc);
 846         qeth_put_reply(reply);
 847
 848 out:
 849         memcpy(&card->seqno.pdu_hdr_ack,
 850                 QETH_PDU_HEADER_SEQ_NO(iob->data),
 851                 QETH_SEQ_NO_LENGTH);
 852         qeth_release_buffer(channel, iob);
 853 }
 854
 855 static int qeth_set_thread_start_bit(struct qeth_card *card,
 856                 unsigned long thread)
 857 {
 858         unsigned long flags;
 859
 860         spin_lock_irqsave(&card->thread_mask_lock, flags);
 861         if (!(card->thread_allowed_mask & thread) ||
 862               (card->thread_start_mask & thread)) {
 863                 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 864                 return -EPERM;
 865         }
 866         card->thread_start_mask |= thread;
 867         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 868         return 0;
 869 }
 870
 871 void qeth_clear_thread_start_bit(struct qeth_card *card, unsigned long thread)
 872 {
 873         unsigned long flags;
 874
 875         spin_lock_irqsave(&card->thread_mask_lock, flags);
 876         card->thread_start_mask &= ~thread;
 877         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 878         wake_up(&card->wait_q);
 879 }
 880 EXPORT_SYMBOL_GPL(qeth_clear_thread_start_bit);
 881
 882 void qeth_clear_thread_running_bit(struct qeth_card *card, unsigned long thread)
 883 {
 884         unsigned long flags;
 885
 886         spin_lock_irqsave(&card->thread_mask_lock, flags);
 887         card->thread_running_mask &= ~thread;
 888         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 889         wake_up_all(&card->wait_q);
 890 }
 891 EXPORT_SYMBOL_GPL(qeth_clear_thread_running_bit);
 892
 893 static int __qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
 894 {
 895         unsigned long flags;
 896         int rc = 0;
 897
 898         spin_lock_irqsave(&card->thread_mask_lock, flags);
 899         if (card->thread_start_mask & thread) {
 900                 if ((card->thread_allowed_mask & thread) &&
 901                     !(card->thread_running_mask & thread)) {
 902                         rc = 1;
 903                         card->thread_start_mask &= ~thread;
 904                         card->thread_running_mask |= thread;
 905                 } else
 906                         rc = -EPERM;
 907         }
 908         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 909         return rc;
 910 }
 911
 912 int qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
 913 {
 914         int rc = 0;
 915
 916         wait_event(card->wait_q,
 917                    (rc = __qeth_do_run_thread(card, thread)) >= 0);
 918         return rc;
 919 }
 920 EXPORT_SYMBOL_GPL(qeth_do_run_thread);
 921
 922 void qeth_schedule_recovery(struct qeth_card *card)
 923 {
 924         QETH_CARD_TEXT(card, 2, "startrec");
 925         if (qeth_set_thread_start_bit(card, QETH_RECOVER_THREAD) == 0)
 926                 schedule_work(&card->kernel_thread_starter);
 927 }
 928 EXPORT_SYMBOL_GPL(qeth_schedule_recovery);
 929
 930 static int qeth_get_problem(struct qeth_card *card, struct ccw_device *cdev,
 931                             struct irb *irb)
 932 {
 933         int dstat, cstat;
 934         char *sense;
 935
 936         sense = (char *) irb->ecw;
 937         cstat = irb->scsw.cmd.cstat;
 938         dstat = irb->scsw.cmd.dstat;
 939
 940         if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK |
 941                      SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK |
 942                      SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) {
 943                 QETH_CARD_TEXT(card, 2, "CGENCHK");
 944                 dev_warn(&cdev->dev, "The qeth device driver "
 945                         "failed to recover an error on the device\n");
 946                 QETH_DBF_MESSAGE(2, "check on channel %x with dstat=%#x, cstat=%#x\n",
 947                                  CCW_DEVID(cdev), dstat, cstat);
 948                 print_hex_dump(KERN_WARNING, "qeth: irb ", DUMP_PREFIX_OFFSET,
 949                                 16, 1, irb, 64, 1);
 950                 return 1;
 951         }
 952
 953         if (dstat & DEV_STAT_UNIT_CHECK) {
 954                 if (sense[SENSE_RESETTING_EVENT_BYTE] &
 955                     SENSE_RESETTING_EVENT_FLAG) {
 956                         QETH_CARD_TEXT(card, 2, "REVIND");
 957                         return 1;
 958                 }
 959                 if (sense[SENSE_COMMAND_REJECT_BYTE] &
 960                     SENSE_COMMAND_REJECT_FLAG) {
 961                         QETH_CARD_TEXT(card, 2, "CMDREJi");
 962                         return 1;
 963                 }
 964                 if ((sense[2] == 0xaf) && (sense[3] == 0xfe)) {
 965                         QETH_CARD_TEXT(card, 2, "AFFE");
 966                         return 1;
 967                 }
 968                 if ((!sense[0]) && (!sense[1]) && (!sense[2]) && (!sense[3])) {
 969                         QETH_CARD_TEXT(card, 2, "ZEROSEN");
 970                         return 0;
 971                 }
 972                 QETH_CARD_TEXT(card, 2, "DGENCHK");
 973                         return 1;
 974         }
 975         return 0;
 976 }
 977
 978 static int qeth_check_irb_error(struct qeth_card *card, struct ccw_device *cdev,
 979                                 unsigned long intparm, struct irb *irb)
 980 {
 981         if (!IS_ERR(irb))
 982                 return 0;
 983
 984         switch (PTR_ERR(irb)) {
 985         case -EIO:
 986                 QETH_DBF_MESSAGE(2, "i/o-error on channel %x\n",
 987                                  CCW_DEVID(cdev));
 988                 QETH_CARD_TEXT(card, 2, "ckirberr");
 989                 QETH_CARD_TEXT_(card, 2, "  rc%d", -EIO);
 990                 return -EIO;
 991         case -ETIMEDOUT:
 992                 dev_warn(&cdev->dev, "A hardware operation timed out"
 993                         " on the device\n");
 994                 QETH_CARD_TEXT(card, 2, "ckirberr");
 995                 QETH_CARD_TEXT_(card, 2, "  rc%d", -ETIMEDOUT);
 996                 if (intparm == QETH_RCD_PARM) {
 997                         if (card->data.ccwdev == cdev) {
 998                                 card->data.state = CH_STATE_DOWN;
 999                                 wake_up(&card->wait_q);
1000                         }
1001                 }
1002                 return -ETIMEDOUT;
1003         default:
1004                 QETH_DBF_MESSAGE(2, "unknown error %ld on channel %x\n",
1005                                  PTR_ERR(irb), CCW_DEVID(cdev));
1006                 QETH_CARD_TEXT(card, 2, "ckirberr");
1007                 QETH_CARD_TEXT(card, 2, "  rc???");
1008                 return PTR_ERR(irb);
1009         }
1010 }
1011
1012 static void qeth_irq(struct ccw_device *cdev, unsigned long intparm,
1013                 struct irb *irb)
1014 {
1015         int rc;
1016         int cstat, dstat;
1017         struct qeth_cmd_buffer *iob = NULL;
1018         struct ccwgroup_device *gdev;
1019         struct qeth_channel *channel;
1020         struct qeth_card *card;
1021
1022         /* while we hold the ccwdev lock, this stays valid: */
1023         gdev = dev_get_drvdata(&cdev->dev);
1024         card = dev_get_drvdata(&gdev->dev);
1025         if (!card)
1026                 return;
1027
1028         QETH_CARD_TEXT(card, 5, "irq");
1029
1030         if (card->read.ccwdev == cdev) {
1031                 channel = &card->read;
1032                 QETH_CARD_TEXT(card, 5, "read");
1033         } else if (card->write.ccwdev == cdev) {
1034                 channel = &card->write;
1035                 QETH_CARD_TEXT(card, 5, "write");
1036         } else {
1037                 channel = &card->data;
1038                 QETH_CARD_TEXT(card, 5, "data");
1039         }
1040
1041         if (qeth_intparm_is_iob(intparm))
1042                 iob = (struct qeth_cmd_buffer *) __va((addr_t)intparm);
1043
1044         rc = qeth_check_irb_error(card, cdev, intparm, irb);
1045         if (rc) {
1046                 /* IO was terminated, free its resources. */
1047                 if (iob)
1048                         qeth_cancel_cmd(iob, rc);
1049                 atomic_set(&channel->irq_pending, 0);
1050                 wake_up(&card->wait_q);
1051                 return;
1052         }
1053
1054         atomic_set(&channel->irq_pending, 0);
1055
1056         if (irb->scsw.cmd.fctl & (SCSW_FCTL_CLEAR_FUNC))
1057                 channel->state = CH_STATE_STOPPED;
1058
1059         if (irb->scsw.cmd.fctl & (SCSW_FCTL_HALT_FUNC))
1060                 channel->state = CH_STATE_HALTED;
1061
1062         /*let's wake up immediately on data channel*/
1063         if ((channel == &card->data) && (intparm != 0) &&
1064             (intparm != QETH_RCD_PARM))
1065                 goto out;
1066
1067         if (intparm == QETH_CLEAR_CHANNEL_PARM) {
1068                 QETH_CARD_TEXT(card, 6, "clrchpar");
1069                 /* we don't have to handle this further */
1070                 intparm = 0;
1071         }
1072         if (intparm == QETH_HALT_CHANNEL_PARM) {
1073                 QETH_CARD_TEXT(card, 6, "hltchpar");
1074                 /* we don't have to handle this further */
1075                 intparm = 0;
1076         }
1077
1078         cstat = irb->scsw.cmd.cstat;
1079         dstat = irb->scsw.cmd.dstat;
1080
1081         if ((dstat & DEV_STAT_UNIT_EXCEP) ||
1082             (dstat & DEV_STAT_UNIT_CHECK) ||
1083             (cstat)) {
1084                 if (irb->esw.esw0.erw.cons) {
1085                         dev_warn(&channel->ccwdev->dev,
1086                                 "The qeth device driver failed to recover "
1087                                 "an error on the device\n");
1088                         QETH_DBF_MESSAGE(2, "sense data available on channel %x: cstat %#X dstat %#X\n",
1089                                          CCW_DEVID(channel->ccwdev), cstat,
1090                                          dstat);
1091                         print_hex_dump(KERN_WARNING, "qeth: irb ",
1092                                 DUMP_PREFIX_OFFSET, 16, 1, irb, 32, 1);
1093                         print_hex_dump(KERN_WARNING, "qeth: sense data ",
1094                                 DUMP_PREFIX_OFFSET, 16, 1, irb->ecw, 32, 1);
1095                 }
1096                 if (intparm == QETH_RCD_PARM) {
1097                         channel->state = CH_STATE_DOWN;
1098                         goto out;
1099                 }
1100                 rc = qeth_get_problem(card, cdev, irb);
1101                 if (rc) {
1102                         card->read_or_write_problem = 1;
1103                         if (iob)
1104                                 qeth_cancel_cmd(iob, rc);
1105                         qeth_clear_ipacmd_list(card);
1106                         qeth_schedule_recovery(card);
1107                         goto out;
1108                 }
1109         }
1110
1111         if (intparm == QETH_RCD_PARM) {
1112                 channel->state = CH_STATE_RCD_DONE;
1113                 goto out;
1114         }
1115         if (channel == &card->data)
1116                 return;
1117         if (channel == &card->read &&
1118             channel->state == CH_STATE_UP)
1119                 __qeth_issue_next_read(card);
1120
1121         if (iob && iob->callback)
1122                 iob->callback(card, iob->channel, iob);
1123
1124 out:
1125         wake_up(&card->wait_q);
1126         return;
1127 }
1128
1129 static void qeth_notify_skbs(struct qeth_qdio_out_q *q,
1130                 struct qeth_qdio_out_buffer *buf,
1131                 enum iucv_tx_notify notification)
1132 {
1133         struct sk_buff *skb;
1134
1135         skb_queue_walk(&buf->skb_list, skb) {
1136                 QETH_CARD_TEXT_(q->card, 5, "skbn%d", notification);
1137                 QETH_CARD_TEXT_(q->card, 5, "%lx", (long) skb);
1138                 if (skb->protocol == htons(ETH_P_AF_IUCV) && skb->sk)
1139                         iucv_sk(skb->sk)->sk_txnotify(skb, notification);
1140         }
1141 }
1142
1143 static void qeth_release_skbs(struct qeth_qdio_out_buffer *buf)
1144 {
1145         struct sk_buff *skb;
1146
1147         /* release may never happen from within CQ tasklet scope */
1148         WARN_ON_ONCE(atomic_read(&buf->state) == QETH_QDIO_BUF_IN_CQ);
1149
1150         if (atomic_read(&buf->state) == QETH_QDIO_BUF_PENDING)
1151                 qeth_notify_skbs(buf->q, buf, TX_NOTIFY_GENERALERROR);
1152
1153         while ((skb = __skb_dequeue(&buf->skb_list)) != NULL)
1154                 consume_skb(skb);
1155 }
1156
1157 static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
1158                                      struct qeth_qdio_out_buffer *buf)
1159 {
1160         int i;
1161
1162         /* is PCI flag set on buffer? */
1163         if (buf->buffer->element[0].sflags & SBAL_SFLAGS0_PCI_REQ)
1164                 atomic_dec(&queue->set_pci_flags_count);
1165
1166         qeth_release_skbs(buf);
1167
1168         for (i = 0; i < queue->max_elements; ++i) {
1169                 if (buf->buffer->element[i].addr && buf->is_header[i])
1170                         kmem_cache_free(qeth_core_header_cache,
1171                                 buf->buffer->element[i].addr);
1172                 buf->is_header[i] = 0;
1173         }
1174
1175         qeth_scrub_qdio_buffer(buf->buffer, queue->max_elements);
1176         buf->next_element_to_fill = 0;
1177         atomic_set(&buf->state, QETH_QDIO_BUF_EMPTY);
1178 }
1179
1180 static void qeth_drain_output_queue(struct qeth_qdio_out_q *q, bool free)
1181 {
1182         int j;
1183
1184         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
1185                 if (!q->bufs[j])
1186                         continue;
1187                 qeth_cleanup_handled_pending(q, j, 1);
1188                 qeth_clear_output_buffer(q, q->bufs[j]);
1189                 if (free) {
1190                         kmem_cache_free(qeth_qdio_outbuf_cache, q->bufs[j]);
1191                         q->bufs[j] = NULL;
1192                 }
1193         }
1194 }
1195
1196 void qeth_drain_output_queues(struct qeth_card *card)
1197 {
1198         int i;
1199
1200         QETH_CARD_TEXT(card, 2, "clearqdbf");
1201         /* clear outbound buffers to free skbs */
1202         for (i = 0; i < card->qdio.no_out_queues; ++i) {
1203                 if (card->qdio.out_qs[i])
1204                         qeth_drain_output_queue(card->qdio.out_qs[i], false);
1205         }
1206 }
1207 EXPORT_SYMBOL_GPL(qeth_drain_output_queues);
1208
1209 static void qeth_free_buffer_pool(struct qeth_card *card)
1210 {
1211         struct qeth_buffer_pool_entry *pool_entry, *tmp;
1212         int i = 0;
1213         list_for_each_entry_safe(pool_entry, tmp,
1214                                  &card->qdio.init_pool.entry_list, init_list){
1215                 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i)
1216                         free_page((unsigned long)pool_entry->elements[i]);
1217                 list_del(&pool_entry->init_list);
1218                 kfree(pool_entry);
1219         }
1220 }
1221
1222 static void qeth_clean_channel(struct qeth_channel *channel)
1223 {
1224         struct ccw_device *cdev = channel->ccwdev;
1225         int cnt;
1226
1227         QETH_DBF_TEXT(SETUP, 2, "freech");
1228
1229         spin_lock_irq(get_ccwdev_lock(cdev));
1230         cdev->handler = NULL;
1231         spin_unlock_irq(get_ccwdev_lock(cdev));
1232
1233         for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++)
1234                 kfree(channel->iob[cnt].data);
1235         kfree(channel->ccw);
1236 }
1237
1238 static int qeth_setup_channel(struct qeth_channel *channel, bool alloc_buffers)
1239 {
1240         struct ccw_device *cdev = channel->ccwdev;
1241         int cnt;
1242
1243         QETH_DBF_TEXT(SETUP, 2, "setupch");
1244
1245         channel->ccw = kmalloc(sizeof(struct ccw1), GFP_KERNEL | GFP_DMA);
1246         if (!channel->ccw)
1247                 return -ENOMEM;
1248         channel->state = CH_STATE_DOWN;
1249         atomic_set(&channel->irq_pending, 0);
1250         init_waitqueue_head(&channel->wait_q);
1251
1252         spin_lock_irq(get_ccwdev_lock(cdev));
1253         cdev->handler = qeth_irq;
1254         spin_unlock_irq(get_ccwdev_lock(cdev));
1255
1256         if (!alloc_buffers)
1257                 return 0;
1258
1259         for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++) {
1260                 channel->iob[cnt].data = kmalloc(QETH_BUFSIZE,
1261                                                  GFP_KERNEL | GFP_DMA);
1262                 if (channel->iob[cnt].data == NULL)
1263                         break;
1264                 channel->iob[cnt].state = BUF_STATE_FREE;
1265                 channel->iob[cnt].channel = channel;
1266         }
1267         if (cnt < QETH_CMD_BUFFER_NO) {
1268                 qeth_clean_channel(channel);
1269                 return -ENOMEM;
1270         }
1271         channel->io_buf_no = 0;
1272         spin_lock_init(&channel->iob_lock);
1273
1274         return 0;
1275 }
1276
1277 static void qeth_osa_set_output_queues(struct qeth_card *card, bool single)
1278 {
1279         unsigned int count = single ? 1 : card->dev->num_tx_queues;
1280
1281         rtnl_lock();
1282         netif_set_real_num_tx_queues(card->dev, count);
1283         rtnl_unlock();
1284
1285         if (card->qdio.no_out_queues == count)
1286                 return;
1287
1288         if (atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED)
1289                 qeth_free_qdio_queues(card);
1290
1291         if (count == 1)
1292                 dev_info(&card->gdev->dev, "Priority Queueing not supported\n");
1293
1294         card->qdio.default_out_queue = single ? 0 : QETH_DEFAULT_QUEUE;
1295         card->qdio.no_out_queues = count;
1296 }
1297
1298 static int qeth_update_from_chp_desc(struct qeth_card *card)
1299 {
1300         struct ccw_device *ccwdev;
1301         struct channel_path_desc_fmt0 *chp_dsc;
1302
1303         QETH_DBF_TEXT(SETUP, 2, "chp_desc");
1304
1305         ccwdev = card->data.ccwdev;
1306         chp_dsc = ccw_device_get_chp_desc(ccwdev, 0);
1307         if (!chp_dsc)
1308                 return -ENOMEM;
1309
1310         card->info.func_level = 0x4100 + chp_dsc->desc;
1311
1312         if (IS_OSD(card) || IS_OSX(card))
1313                 /* CHPP field bit 6 == 1 -> single queue */
1314                 qeth_osa_set_output_queues(card, chp_dsc->chpp & 0x02);
1315
1316         kfree(chp_dsc);
1317         QETH_DBF_TEXT_(SETUP, 2, "nr:%x", card->qdio.no_out_queues);
1318         QETH_DBF_TEXT_(SETUP, 2, "lvl:%02x", card->info.func_level);
1319         return 0;
1320 }
1321
1322 static void qeth_init_qdio_info(struct qeth_card *card)
1323 {
1324         QETH_DBF_TEXT(SETUP, 4, "intqdinf");
1325         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
1326         card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT;
1327         card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
1328
1329         /* inbound */
1330         card->qdio.no_in_queues = 1;
1331         card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
1332         if (IS_IQD(card))
1333                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_HSDEFAULT;
1334         else
1335                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_DEFAULT;
1336         card->qdio.in_buf_pool.buf_count = card->qdio.init_pool.buf_count;
1337         INIT_LIST_HEAD(&card->qdio.in_buf_pool.entry_list);
1338         INIT_LIST_HEAD(&card->qdio.init_pool.entry_list);
1339 }
1340
1341 static void qeth_set_initial_options(struct qeth_card *card)
1342 {
1343         card->options.route4.type = NO_ROUTER;
1344         card->options.route6.type = NO_ROUTER;
1345         card->options.rx_sg_cb = QETH_RX_SG_CB;
1346         card->options.isolation = ISOLATION_MODE_NONE;
1347         card->options.cq = QETH_CQ_DISABLED;
1348         card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
1349 }
1350
1351 static int qeth_do_start_thread(struct qeth_card *card, unsigned long thread)
1352 {
1353         unsigned long flags;
1354         int rc = 0;
1355
1356         spin_lock_irqsave(&card->thread_mask_lock, flags);
1357         QETH_CARD_TEXT_(card, 4, "  %02x%02x%02x",
1358                         (u8) card->thread_start_mask,
1359                         (u8) card->thread_allowed_mask,
1360                         (u8) card->thread_running_mask);
1361         rc = (card->thread_start_mask & thread);
1362         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1363         return rc;
1364 }
1365
1366 static void qeth_start_kernel_thread(struct work_struct *work)
1367 {
1368         struct task_struct *ts;
1369         struct qeth_card *card = container_of(work, struct qeth_card,
1370                                         kernel_thread_starter);
1371         QETH_CARD_TEXT(card , 2, "strthrd");
1372
1373         if (card->read.state != CH_STATE_UP &&
1374             card->write.state != CH_STATE_UP)
1375                 return;
1376         if (qeth_do_start_thread(card, QETH_RECOVER_THREAD)) {
1377                 ts = kthread_run(card->discipline->recover, (void *)card,
1378                                 "qeth_recover");
1379                 if (IS_ERR(ts)) {
1380                         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1381                         qeth_clear_thread_running_bit(card,
1382                                 QETH_RECOVER_THREAD);
1383                 }
1384         }
1385 }
1386
1387 static void qeth_buffer_reclaim_work(struct work_struct *);
1388 static void qeth_setup_card(struct qeth_card *card)
1389 {
1390         QETH_DBF_TEXT(SETUP, 2, "setupcrd");
1391         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1392
1393         card->info.type = CARD_RDEV(card)->id.driver_info;
1394         card->state = CARD_STATE_DOWN;
1395         spin_lock_init(&card->lock);
1396         spin_lock_init(&card->thread_mask_lock);
1397         mutex_init(&card->conf_mutex);
1398         mutex_init(&card->discipline_mutex);
1399         INIT_WORK(&card->kernel_thread_starter, qeth_start_kernel_thread);
1400         INIT_LIST_HEAD(&card->cmd_waiter_list);
1401         init_waitqueue_head(&card->wait_q);
1402         qeth_set_initial_options(card);
1403         /* IP address takeover */
1404         INIT_LIST_HEAD(&card->ipato.entries);
1405         qeth_init_qdio_info(card);
1406         INIT_DELAYED_WORK(&card->buffer_reclaim_work, qeth_buffer_reclaim_work);
1407         INIT_WORK(&card->close_dev_work, qeth_close_dev_handler);
1408 }
1409
1410 static void qeth_core_sl_print(struct seq_file *m, struct service_level *slr)
1411 {
1412         struct qeth_card *card = container_of(slr, struct qeth_card,
1413                                         qeth_service_level);
1414         if (card->info.mcl_level[0])
1415                 seq_printf(m, "qeth: %s firmware level %s\n",
1416                         CARD_BUS_ID(card), card->info.mcl_level);
1417 }
1418
1419 static struct qeth_card *qeth_alloc_card(struct ccwgroup_device *gdev)
1420 {
1421         struct qeth_card *card;
1422
1423         QETH_DBF_TEXT(SETUP, 2, "alloccrd");
1424         card = kzalloc(sizeof(*card), GFP_KERNEL);
1425         if (!card)
1426                 goto out;
1427         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1428
1429         card->gdev = gdev;
1430         dev_set_drvdata(&gdev->dev, card);
1431         CARD_RDEV(card) = gdev->cdev[0];
1432         CARD_WDEV(card) = gdev->cdev[1];
1433         CARD_DDEV(card) = gdev->cdev[2];
1434
1435         card->event_wq = alloc_ordered_workqueue("%s_event", 0,
1436                                                  dev_name(&gdev->dev));
1437         if (!card->event_wq)
1438                 goto out_wq;
1439         if (qeth_setup_channel(&card->read, true))
1440                 goto out_ip;
1441         if (qeth_setup_channel(&card->write, true))
1442                 goto out_channel;
1443         if (qeth_setup_channel(&card->data, false))
1444                 goto out_data;
1445         card->qeth_service_level.seq_print = qeth_core_sl_print;
1446         register_service_level(&card->qeth_service_level);
1447         return card;
1448
1449 out_data:
1450         qeth_clean_channel(&card->write);
1451 out_channel:
1452         qeth_clean_channel(&card->read);
1453 out_ip:
1454         destroy_workqueue(card->event_wq);
1455 out_wq:
1456         dev_set_drvdata(&gdev->dev, NULL);
1457         kfree(card);
1458 out:
1459         return NULL;
1460 }
1461
1462 static int qeth_clear_channel(struct qeth_card *card,
1463                               struct qeth_channel *channel)
1464 {
1465         int rc;
1466
1467         QETH_CARD_TEXT(card, 3, "clearch");
1468         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1469         rc = ccw_device_clear(channel->ccwdev, QETH_CLEAR_CHANNEL_PARM);
1470         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1471
1472         if (rc)
1473                 return rc;
1474         rc = wait_event_interruptible_timeout(card->wait_q,
1475                         channel->state == CH_STATE_STOPPED, QETH_TIMEOUT);
1476         if (rc == -ERESTARTSYS)
1477                 return rc;
1478         if (channel->state != CH_STATE_STOPPED)
1479                 return -ETIME;
1480         channel->state = CH_STATE_DOWN;
1481         return 0;
1482 }
1483
1484 static int qeth_halt_channel(struct qeth_card *card,
1485                              struct qeth_channel *channel)
1486 {
1487         int rc;
1488
1489         QETH_CARD_TEXT(card, 3, "haltch");
1490         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1491         rc = ccw_device_halt(channel->ccwdev, QETH_HALT_CHANNEL_PARM);
1492         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1493
1494         if (rc)
1495                 return rc;
1496         rc = wait_event_interruptible_timeout(card->wait_q,
1497                         channel->state == CH_STATE_HALTED, QETH_TIMEOUT);
1498         if (rc == -ERESTARTSYS)
1499                 return rc;
1500         if (channel->state != CH_STATE_HALTED)
1501                 return -ETIME;
1502         return 0;
1503 }
1504
1505 static int qeth_halt_channels(struct qeth_card *card)
1506 {
1507         int rc1 = 0, rc2 = 0, rc3 = 0;
1508
1509         QETH_CARD_TEXT(card, 3, "haltchs");
1510         rc1 = qeth_halt_channel(card, &card->read);
1511         rc2 = qeth_halt_channel(card, &card->write);
1512         rc3 = qeth_halt_channel(card, &card->data);
1513         if (rc1)
1514                 return rc1;
1515         if (rc2)
1516                 return rc2;
1517         return rc3;
1518 }
1519
1520 static int qeth_clear_channels(struct qeth_card *card)
1521 {
1522         int rc1 = 0, rc2 = 0, rc3 = 0;
1523
1524         QETH_CARD_TEXT(card, 3, "clearchs");
1525         rc1 = qeth_clear_channel(card, &card->read);
1526         rc2 = qeth_clear_channel(card, &card->write);
1527         rc3 = qeth_clear_channel(card, &card->data);
1528         if (rc1)
1529                 return rc1;
1530         if (rc2)
1531                 return rc2;
1532         return rc3;
1533 }
1534
1535 static int qeth_clear_halt_card(struct qeth_card *card, int halt)
1536 {
1537         int rc = 0;
1538
1539         QETH_CARD_TEXT(card, 3, "clhacrd");
1540
1541         if (halt)
1542                 rc = qeth_halt_channels(card);
1543         if (rc)
1544                 return rc;
1545         return qeth_clear_channels(card);
1546 }
1547
1548 int qeth_qdio_clear_card(struct qeth_card *card, int use_halt)
1549 {
1550         int rc = 0;
1551
1552         QETH_CARD_TEXT(card, 3, "qdioclr");
1553         switch (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ESTABLISHED,
1554                 QETH_QDIO_CLEANING)) {
1555         case QETH_QDIO_ESTABLISHED:
1556                 if (IS_IQD(card))
1557                         rc = qdio_shutdown(CARD_DDEV(card),
1558                                 QDIO_FLAG_CLEANUP_USING_HALT);
1559                 else
1560                         rc = qdio_shutdown(CARD_DDEV(card),
1561                                 QDIO_FLAG_CLEANUP_USING_CLEAR);
1562                 if (rc)
1563                         QETH_CARD_TEXT_(card, 3, "1err%d", rc);
1564                 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
1565                 break;
1566         case QETH_QDIO_CLEANING:
1567                 return rc;
1568         default:
1569                 break;
1570         }
1571         rc = qeth_clear_halt_card(card, use_halt);
1572         if (rc)
1573                 QETH_CARD_TEXT_(card, 3, "2err%d", rc);
1574         card->state = CARD_STATE_DOWN;
1575         return rc;
1576 }
1577 EXPORT_SYMBOL_GPL(qeth_qdio_clear_card);
1578
1579 static int qeth_read_conf_data(struct qeth_card *card, void **buffer,
1580                                int *length)
1581 {
1582         struct ciw *ciw;
1583         char *rcd_buf;
1584         int ret;
1585         struct qeth_channel *channel = &card->data;
1586
1587         /*
1588          * scan for RCD command in extended SenseID data
1589          */
1590         ciw = ccw_device_get_ciw(channel->ccwdev, CIW_TYPE_RCD);
1591         if (!ciw || ciw->cmd == 0)
1592                 return -EOPNOTSUPP;
1593         rcd_buf = kzalloc(ciw->count, GFP_KERNEL | GFP_DMA);
1594         if (!rcd_buf)
1595                 return -ENOMEM;
1596
1597         qeth_setup_ccw(channel->ccw, ciw->cmd, ciw->count, rcd_buf);
1598         channel->state = CH_STATE_RCD;
1599         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1600         ret = ccw_device_start_timeout(channel->ccwdev, channel->ccw,
1601                                        QETH_RCD_PARM, LPM_ANYPATH, 0,
1602                                        QETH_RCD_TIMEOUT);
1603         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1604         if (!ret)
1605                 wait_event(card->wait_q,
1606                            (channel->state == CH_STATE_RCD_DONE ||
1607                             channel->state == CH_STATE_DOWN));
1608         if (channel->state == CH_STATE_DOWN)
1609                 ret = -EIO;
1610         else
1611                 channel->state = CH_STATE_DOWN;
1612         if (ret) {
1613                 kfree(rcd_buf);
1614                 *buffer = NULL;
1615                 *length = 0;
1616         } else {
1617                 *length = ciw->count;
1618                 *buffer = rcd_buf;
1619         }
1620         return ret;
1621 }
1622
1623 static void qeth_configure_unitaddr(struct qeth_card *card, char *prcd)
1624 {
1625         QETH_DBF_TEXT(SETUP, 2, "cfgunit");
1626         card->info.chpid = prcd[30];
1627         card->info.unit_addr2 = prcd[31];
1628         card->info.cula = prcd[63];
1629         card->info.is_vm_nic = ((prcd[0x10] == _ascebc['V']) &&
1630                                 (prcd[0x11] == _ascebc['M']));
1631 }
1632
1633 static enum qeth_discipline_id qeth_vm_detect_layer(struct qeth_card *card)
1634 {
1635         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1636         struct diag26c_vnic_resp *response = NULL;
1637         struct diag26c_vnic_req *request = NULL;
1638         struct ccw_dev_id id;
1639         char userid[80];
1640         int rc = 0;
1641
1642         QETH_DBF_TEXT(SETUP, 2, "vmlayer");
1643
1644         cpcmd("QUERY USERID", userid, sizeof(userid), &rc);
1645         if (rc)
1646                 goto out;
1647
1648         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
1649         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
1650         if (!request || !response) {
1651                 rc = -ENOMEM;
1652                 goto out;
1653         }
1654
1655         ccw_device_get_id(CARD_RDEV(card), &id);
1656         request->resp_buf_len = sizeof(*response);
1657         request->resp_version = DIAG26C_VERSION6_VM65918;
1658         request->req_format = DIAG26C_VNIC_INFO;
1659         ASCEBC(userid, 8);
1660         memcpy(&request->sys_name, userid, 8);
1661         request->devno = id.devno;
1662
1663         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1664         rc = diag26c(request, response, DIAG26C_PORT_VNIC);
1665         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1666         if (rc)
1667                 goto out;
1668         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
1669
1670         if (request->resp_buf_len < sizeof(*response) ||
1671             response->version != request->resp_version) {
1672                 rc = -EIO;
1673                 goto out;
1674         }
1675
1676         if (response->protocol == VNIC_INFO_PROT_L2)
1677                 disc = QETH_DISCIPLINE_LAYER2;
1678         else if (response->protocol == VNIC_INFO_PROT_L3)
1679                 disc = QETH_DISCIPLINE_LAYER3;
1680
1681 out:
1682         kfree(response);
1683         kfree(request);
1684         if (rc)
1685                 QETH_DBF_TEXT_(SETUP, 2, "err%x", rc);
1686         return disc;
1687 }
1688
1689 /* Determine whether the device requires a specific layer discipline */
1690 static enum qeth_discipline_id qeth_enforce_discipline(struct qeth_card *card)
1691 {
1692         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1693
1694         if (IS_OSM(card) || IS_OSN(card))
1695                 disc = QETH_DISCIPLINE_LAYER2;
1696         else if (IS_VM_NIC(card))
1697                 disc = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
1698                                       qeth_vm_detect_layer(card);
1699
1700         switch (disc) {
1701         case QETH_DISCIPLINE_LAYER2:
1702                 QETH_DBF_TEXT(SETUP, 3, "force l2");
1703                 break;
1704         case QETH_DISCIPLINE_LAYER3:
1705                 QETH_DBF_TEXT(SETUP, 3, "force l3");
1706                 break;
1707         default:
1708                 QETH_DBF_TEXT(SETUP, 3, "force no");
1709         }
1710
1711         return disc;
1712 }
1713
1714 static void qeth_configure_blkt_default(struct qeth_card *card, char *prcd)
1715 {
1716         QETH_DBF_TEXT(SETUP, 2, "cfgblkt");
1717
1718         if (prcd[74] == 0xF0 && prcd[75] == 0xF0 &&
1719             prcd[76] >= 0xF1 && prcd[76] <= 0xF4) {
1720                 card->info.blkt.time_total = 0;
1721                 card->info.blkt.inter_packet = 0;
1722                 card->info.blkt.inter_packet_jumbo = 0;
1723         } else {
1724                 card->info.blkt.time_total = 250;
1725                 card->info.blkt.inter_packet = 5;
1726                 card->info.blkt.inter_packet_jumbo = 15;
1727         }
1728 }
1729
1730 static void qeth_init_tokens(struct qeth_card *card)
1731 {
1732         card->token.issuer_rm_w = 0x00010103UL;
1733         card->token.cm_filter_w = 0x00010108UL;
1734         card->token.cm_connection_w = 0x0001010aUL;
1735         card->token.ulp_filter_w = 0x0001010bUL;
1736         card->token.ulp_connection_w = 0x0001010dUL;
1737 }
1738
1739 static void qeth_init_func_level(struct qeth_card *card)
1740 {
1741         switch (card->info.type) {
1742         case QETH_CARD_TYPE_IQD:
1743                 card->info.func_level = QETH_IDX_FUNC_LEVEL_IQD;
1744                 break;
1745         case QETH_CARD_TYPE_OSD:
1746         case QETH_CARD_TYPE_OSN:
1747                 card->info.func_level = QETH_IDX_FUNC_LEVEL_OSD;
1748                 break;
1749         default:
1750                 break;
1751         }
1752 }
1753
1754 static void qeth_idx_finalize_cmd(struct qeth_card *card,
1755                                   struct qeth_cmd_buffer *iob,
1756                                   unsigned int length)
1757 {
1758         qeth_setup_ccw(iob->channel->ccw, CCW_CMD_WRITE, length, iob->data);
1759
1760         memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data), &card->seqno.trans_hdr,
1761                QETH_SEQ_NO_LENGTH);
1762         if (iob->channel == &card->write)
1763                 card->seqno.trans_hdr++;
1764 }
1765
1766 static int qeth_peer_func_level(int level)
1767 {
1768         if ((level & 0xff) == 8)
1769                 return (level & 0xff) + 0x400;
1770         if (((level >> 8) & 3) == 1)
1771                 return (level & 0xff) + 0x200;
1772         return level;
1773 }
1774
1775 static void qeth_mpc_finalize_cmd(struct qeth_card *card,
1776                                   struct qeth_cmd_buffer *iob,
1777                                   unsigned int length)
1778 {
1779         qeth_idx_finalize_cmd(card, iob, length);
1780
1781         memcpy(QETH_PDU_HEADER_SEQ_NO(iob->data),
1782                &card->seqno.pdu_hdr, QETH_SEQ_NO_LENGTH);
1783         card->seqno.pdu_hdr++;
1784         memcpy(QETH_PDU_HEADER_ACK_SEQ_NO(iob->data),
1785                &card->seqno.pdu_hdr_ack, QETH_SEQ_NO_LENGTH);
1786
1787         iob->reply->seqno = QETH_IDX_COMMAND_SEQNO;
1788         iob->callback = qeth_release_buffer_cb;
1789 }
1790
1791 /**
1792  * qeth_send_control_data() -   send control command to the card
1793  * @card:                       qeth_card structure pointer
1794  * @len:                        size of the command buffer
1795  * @iob:                        qeth_cmd_buffer pointer
1796  * @reply_cb:                   callback function pointer
1797  * @cb_card:                    pointer to the qeth_card structure
1798  * @cb_reply:                   pointer to the qeth_reply structure
1799  * @cb_cmd:                     pointer to the original iob for non-IPA
1800  *                              commands, or to the qeth_ipa_cmd structure
1801  *                              for the IPA commands.
1802  * @reply_param:                private pointer passed to the callback
1803  *
1804  * Callback function gets called one or more times, with cb_cmd
1805  * pointing to the response returned by the hardware. Callback
1806  * function must return
1807  *   > 0 if more reply blocks are expected,
1808  *     0 if the last or only reply block is received, and
1809  *   < 0 on error.
1810  * Callback function can get the value of the reply_param pointer from the
1811  * field 'param' of the structure qeth_reply.
1812  */
1813
1814 static int qeth_send_control_data(struct qeth_card *card, int len,
1815                                   struct qeth_cmd_buffer *iob,
1816                                   int (*reply_cb)(struct qeth_card *cb_card,
1817                                                   struct qeth_reply *cb_reply,
1818                                                   unsigned long cb_cmd),
1819                                   void *reply_param)
1820 {
1821         struct qeth_channel *channel = iob->channel;
1822         long timeout = iob->timeout;
1823         int rc;
1824         struct qeth_reply *reply = NULL;
1825
1826         QETH_CARD_TEXT(card, 2, "sendctl");
1827
1828         reply = qeth_alloc_reply(card);
1829         if (!reply) {
1830                 qeth_release_buffer(channel, iob);
1831                 return -ENOMEM;
1832         }
1833         reply->callback = reply_cb;
1834         reply->param = reply_param;
1835
1836         /* pairs with qeth_release_buffer(): */
1837         qeth_get_reply(reply);
1838         iob->reply = reply;
1839
1840         timeout = wait_event_interruptible_timeout(card->wait_q,
1841                                                    qeth_trylock_channel(channel),
1842                                                    timeout);
1843         if (timeout <= 0) {
1844                 qeth_put_reply(reply);
1845                 qeth_release_buffer(channel, iob);
1846                 return (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
1847         }
1848
1849         iob->finalize(card, iob, len);
1850         QETH_DBF_HEX(CTRL, 2, iob->data, min(len, QETH_DBF_CTRL_LEN));
1851
1852         qeth_enqueue_reply(card, reply);
1853
1854         QETH_CARD_TEXT(card, 6, "noirqpnd");
1855         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1856         rc = ccw_device_start_timeout(channel->ccwdev, channel->ccw,
1857                                       (addr_t) iob, 0, 0, timeout);
1858         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1859         if (rc) {
1860                 QETH_DBF_MESSAGE(2, "qeth_send_control_data on device %x: ccw_device_start rc = %i\n",
1861                                  CARD_DEVID(card), rc);
1862                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
1863                 qeth_dequeue_reply(card, reply);
1864                 qeth_put_reply(reply);
1865                 qeth_release_buffer(channel, iob);
1866                 atomic_set(&channel->irq_pending, 0);
1867                 wake_up(&card->wait_q);
1868                 return rc;
1869         }
1870
1871         timeout = wait_for_completion_interruptible_timeout(&reply->received,
1872                                                             timeout);
1873         if (timeout <= 0)
1874                 rc = (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
1875
1876         qeth_dequeue_reply(card, reply);
1877         if (!rc)
1878                 rc = reply->rc;
1879         qeth_put_reply(reply);
1880         return rc;
1881 }
1882
1883 static int qeth_idx_check_activate_response(struct qeth_card *card,
1884                                             struct qeth_channel *channel,
1885                                             struct qeth_cmd_buffer *iob)
1886 {
1887         int rc;
1888
1889         rc = qeth_check_idx_response(card, iob->data);
1890         if (rc)
1891                 return rc;
1892
1893         if (QETH_IS_IDX_ACT_POS_REPLY(iob->data))
1894                 return 0;
1895
1896         /* negative reply: */
1897         QETH_DBF_TEXT_(SETUP, 2, "idxneg%c",
1898                        QETH_IDX_ACT_CAUSE_CODE(iob->data));
1899
1900         switch (QETH_IDX_ACT_CAUSE_CODE(iob->data)) {
1901         case QETH_IDX_ACT_ERR_EXCL:
1902                 dev_err(&channel->ccwdev->dev,
1903                         "The adapter is used exclusively by another host\n");
1904                 return -EBUSY;
1905         case QETH_IDX_ACT_ERR_AUTH:
1906         case QETH_IDX_ACT_ERR_AUTH_USER:
1907                 dev_err(&channel->ccwdev->dev,
1908                         "Setting the device online failed because of insufficient authorization\n");
1909                 return -EPERM;
1910         default:
1911                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: negative reply\n",
1912                                  CCW_DEVID(channel->ccwdev));
1913                 return -EIO;
1914         }
1915 }
1916
1917 static void qeth_idx_query_read_cb(struct qeth_card *card,
1918                                    struct qeth_channel *channel,
1919                                    struct qeth_cmd_buffer *iob)
1920 {
1921         u16 peer_level;
1922         int rc;
1923
1924         QETH_DBF_TEXT(SETUP, 2, "idxrdcb");
1925
1926         rc = qeth_idx_check_activate_response(card, channel, iob);
1927         if (rc)
1928                 goto out;
1929
1930         memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
1931         if (peer_level != qeth_peer_func_level(card->info.func_level)) {
1932                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
1933                                  CCW_DEVID(channel->ccwdev),
1934                                  card->info.func_level, peer_level);
1935                 rc = -EINVAL;
1936                 goto out;
1937         }
1938
1939         memcpy(&card->token.issuer_rm_r,
1940                QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
1941                QETH_MPC_TOKEN_LENGTH);
1942         memcpy(&card->info.mcl_level[0],
1943                QETH_IDX_REPLY_LEVEL(iob->data), QETH_MCL_LENGTH);
1944
1945 out:
1946         qeth_notify_reply(iob->reply, rc);
1947         qeth_release_buffer(channel, iob);
1948 }
1949
1950 static void qeth_idx_query_write_cb(struct qeth_card *card,
1951                                     struct qeth_channel *channel,
1952                                     struct qeth_cmd_buffer *iob)
1953 {
1954         u16 peer_level;
1955         int rc;
1956
1957         QETH_DBF_TEXT(SETUP, 2, "idxwrcb");
1958
1959         rc = qeth_idx_check_activate_response(card, channel, iob);
1960         if (rc)
1961                 goto out;
1962
1963         memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
1964         if ((peer_level & ~0x0100) !=
1965             qeth_peer_func_level(card->info.func_level)) {
1966                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
1967                                  CCW_DEVID(channel->ccwdev),
1968                                  card->info.func_level, peer_level);
1969                 rc = -EINVAL;
1970         }
1971
1972 out:
1973         qeth_notify_reply(iob->reply, rc);
1974         qeth_release_buffer(channel, iob);
1975 }
1976
1977 static void qeth_idx_finalize_query_cmd(struct qeth_card *card,
1978                                         struct qeth_cmd_buffer *iob,
1979                                         unsigned int length)
1980 {
1981         qeth_setup_ccw(iob->channel->ccw, CCW_CMD_READ, length, iob->data);
1982 }
1983
1984 static void qeth_idx_activate_cb(struct qeth_card *card,
1985                                  struct qeth_channel *channel,
1986                                  struct qeth_cmd_buffer *iob)
1987 {
1988         qeth_notify_reply(iob->reply, 0);
1989         qeth_release_buffer(channel, iob);
1990 }
1991
1992 static void qeth_idx_setup_activate_cmd(struct qeth_card *card,
1993                                         struct qeth_cmd_buffer *iob)
1994 {
1995         u16 addr = (card->info.cula << 8) + card->info.unit_addr2;
1996         u8 port = ((u8)card->dev->dev_port) | 0x80;
1997         struct ccw_dev_id dev_id;
1998
1999         ccw_device_get_id(CARD_DDEV(card), &dev_id);
2000         iob->finalize = qeth_idx_finalize_cmd;
2001         iob->callback = qeth_idx_activate_cb;
2002
2003         memcpy(QETH_IDX_ACT_PNO(iob->data), &port, 1);
2004         memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2005                &card->token.issuer_rm_w, QETH_MPC_TOKEN_LENGTH);
2006         memcpy(QETH_IDX_ACT_FUNC_LEVEL(iob->data),
2007                &card->info.func_level, 2);
2008         memcpy(QETH_IDX_ACT_QDIO_DEV_CUA(iob->data), &dev_id.devno, 2);
2009         memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &addr, 2);
2010 }
2011
2012 static int qeth_idx_activate_read_channel(struct qeth_card *card)
2013 {
2014         struct qeth_channel *channel = &card->read;
2015         struct qeth_cmd_buffer *iob;
2016         int rc;
2017
2018         QETH_DBF_TEXT(SETUP, 2, "idxread");
2019
2020         iob = qeth_get_buffer(channel);
2021         if (!iob)
2022                 return -ENOMEM;
2023
2024         memcpy(iob->data, IDX_ACTIVATE_READ, IDX_ACTIVATE_SIZE);
2025         qeth_idx_setup_activate_cmd(card, iob);
2026
2027         rc = qeth_send_control_data(card, IDX_ACTIVATE_SIZE, iob, NULL, NULL);
2028         if (rc)
2029                 return rc;
2030
2031         iob = qeth_get_buffer(channel);
2032         if (!iob)
2033                 return -ENOMEM;
2034
2035         iob->finalize = qeth_idx_finalize_query_cmd;
2036         iob->callback = qeth_idx_query_read_cb;
2037         rc = qeth_send_control_data(card, QETH_BUFSIZE, iob, NULL, NULL);
2038         if (rc)
2039                 return rc;
2040
2041         channel->state = CH_STATE_UP;
2042         return 0;
2043 }
2044
2045 static int qeth_idx_activate_write_channel(struct qeth_card *card)
2046 {
2047         struct qeth_channel *channel = &card->write;
2048         struct qeth_cmd_buffer *iob;
2049         int rc;
2050
2051         QETH_DBF_TEXT(SETUP, 2, "idxwrite");
2052
2053         iob = qeth_get_buffer(channel);
2054         if (!iob)
2055                 return -ENOMEM;
2056
2057         memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE);
2058         qeth_idx_setup_activate_cmd(card, iob);
2059
2060         rc = qeth_send_control_data(card, IDX_ACTIVATE_SIZE, iob, NULL, NULL);
2061         if (rc)
2062                 return rc;
2063
2064         iob = qeth_get_buffer(channel);
2065         if (!iob)
2066                 return -ENOMEM;
2067
2068         iob->finalize = qeth_idx_finalize_query_cmd;
2069         iob->callback = qeth_idx_query_write_cb;
2070         rc = qeth_send_control_data(card, QETH_BUFSIZE, iob, NULL, NULL);
2071         if (rc)
2072                 return rc;
2073
2074         channel->state = CH_STATE_UP;
2075         return 0;
2076 }
2077
2078 static int qeth_cm_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2079                 unsigned long data)
2080 {
2081         struct qeth_cmd_buffer *iob;
2082
2083         QETH_DBF_TEXT(SETUP, 2, "cmenblcb");
2084
2085         iob = (struct qeth_cmd_buffer *) data;
2086         memcpy(&card->token.cm_filter_r,
2087                QETH_CM_ENABLE_RESP_FILTER_TOKEN(iob->data),
2088                QETH_MPC_TOKEN_LENGTH);
2089         return 0;
2090 }
2091
2092 static int qeth_cm_enable(struct qeth_card *card)
2093 {
2094         int rc;
2095         struct qeth_cmd_buffer *iob;
2096
2097         QETH_DBF_TEXT(SETUP, 2, "cmenable");
2098
2099         iob = qeth_wait_for_buffer(&card->write);
2100         iob->finalize = qeth_mpc_finalize_cmd;
2101         memcpy(iob->data, CM_ENABLE, CM_ENABLE_SIZE);
2102
2103         memcpy(QETH_CM_ENABLE_ISSUER_RM_TOKEN(iob->data),
2104                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2105         memcpy(QETH_CM_ENABLE_FILTER_TOKEN(iob->data),
2106                &card->token.cm_filter_w, QETH_MPC_TOKEN_LENGTH);
2107
2108         rc = qeth_send_control_data(card, CM_ENABLE_SIZE, iob,
2109                                     qeth_cm_enable_cb, NULL);
2110         return rc;
2111 }
2112
2113 static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2114                 unsigned long data)
2115 {
2116         struct qeth_cmd_buffer *iob;
2117
2118         QETH_DBF_TEXT(SETUP, 2, "cmsetpcb");
2119
2120         iob = (struct qeth_cmd_buffer *) data;
2121         memcpy(&card->token.cm_connection_r,
2122                QETH_CM_SETUP_RESP_DEST_ADDR(iob->data),
2123                QETH_MPC_TOKEN_LENGTH);
2124         return 0;
2125 }
2126
2127 static int qeth_cm_setup(struct qeth_card *card)
2128 {
2129         int rc;
2130         struct qeth_cmd_buffer *iob;
2131
2132         QETH_DBF_TEXT(SETUP, 2, "cmsetup");
2133
2134         iob = qeth_wait_for_buffer(&card->write);
2135         iob->finalize = qeth_mpc_finalize_cmd;
2136         memcpy(iob->data, CM_SETUP, CM_SETUP_SIZE);
2137
2138         memcpy(QETH_CM_SETUP_DEST_ADDR(iob->data),
2139                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2140         memcpy(QETH_CM_SETUP_CONNECTION_TOKEN(iob->data),
2141                &card->token.cm_connection_w, QETH_MPC_TOKEN_LENGTH);
2142         memcpy(QETH_CM_SETUP_FILTER_TOKEN(iob->data),
2143                &card->token.cm_filter_r, QETH_MPC_TOKEN_LENGTH);
2144         rc = qeth_send_control_data(card, CM_SETUP_SIZE, iob,
2145                                     qeth_cm_setup_cb, NULL);
2146         return rc;
2147 }
2148
2149 static int qeth_update_max_mtu(struct qeth_card *card, unsigned int max_mtu)
2150 {
2151         struct net_device *dev = card->dev;
2152         unsigned int new_mtu;
2153
2154         if (!max_mtu) {
2155                 /* IQD needs accurate max MTU to set up its RX buffers: */
2156                 if (IS_IQD(card))
2157                         return -EINVAL;
2158                 /* tolerate quirky HW: */
2159                 max_mtu = ETH_MAX_MTU;
2160         }
2161
2162         rtnl_lock();
2163         if (IS_IQD(card)) {
2164                 /* move any device with default MTU to new max MTU: */
2165                 new_mtu = (dev->mtu == dev->max_mtu) ? max_mtu : dev->mtu;
2166
2167                 /* adjust RX buffer size to new max MTU: */
2168                 card->qdio.in_buf_size = max_mtu + 2 * PAGE_SIZE;
2169                 if (dev->max_mtu && dev->max_mtu != max_mtu)
2170                         qeth_free_qdio_queues(card);
2171         } else {
2172                 if (dev->mtu)
2173                         new_mtu = dev->mtu;
2174                 /* default MTUs for first setup: */
2175                 else if (IS_LAYER2(card))
2176                         new_mtu = ETH_DATA_LEN;
2177                 else
2178                         new_mtu = ETH_DATA_LEN - 8; /* allow for LLC + SNAP */
2179         }
2180
2181         dev->max_mtu = max_mtu;
2182         dev->mtu = min(new_mtu, max_mtu);
2183         rtnl_unlock();
2184         return 0;
2185 }
2186
2187 static int qeth_get_mtu_outof_framesize(int framesize)
2188 {
2189         switch (framesize) {
2190         case 0x4000:
2191                 return 8192;
2192         case 0x6000:
2193                 return 16384;
2194         case 0xa000:
2195                 return 32768;
2196         case 0xffff:
2197                 return 57344;
2198         default:
2199                 return 0;
2200         }
2201 }
2202
2203 static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2204                 unsigned long data)
2205 {
2206         __u16 mtu, framesize;
2207         __u16 len;
2208         __u8 link_type;
2209         struct qeth_cmd_buffer *iob;
2210
2211         QETH_DBF_TEXT(SETUP, 2, "ulpenacb");
2212
2213         iob = (struct qeth_cmd_buffer *) data;
2214         memcpy(&card->token.ulp_filter_r,
2215                QETH_ULP_ENABLE_RESP_FILTER_TOKEN(iob->data),
2216                QETH_MPC_TOKEN_LENGTH);
2217         if (IS_IQD(card)) {
2218                 memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2);
2219                 mtu = qeth_get_mtu_outof_framesize(framesize);
2220         } else {
2221                 mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data);
2222         }
2223         *(u16 *)reply->param = mtu;
2224
2225         memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2);
2226         if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) {
2227                 memcpy(&link_type,
2228                        QETH_ULP_ENABLE_RESP_LINK_TYPE(iob->data), 1);
2229                 card->info.link_type = link_type;
2230         } else
2231                 card->info.link_type = 0;
2232         QETH_DBF_TEXT_(SETUP, 2, "link%d", card->info.link_type);
2233         return 0;
2234 }
2235
2236 static u8 qeth_mpc_select_prot_type(struct qeth_card *card)
2237 {
2238         if (IS_OSN(card))
2239                 return QETH_PROT_OSN2;
2240         return IS_LAYER2(card) ? QETH_PROT_LAYER2 : QETH_PROT_TCPIP;
2241 }
2242
2243 static int qeth_ulp_enable(struct qeth_card *card)
2244 {
2245         u8 prot_type = qeth_mpc_select_prot_type(card);
2246         struct qeth_cmd_buffer *iob;
2247         u16 max_mtu;
2248         int rc;
2249
2250         /*FIXME: trace view callbacks*/
2251         QETH_DBF_TEXT(SETUP, 2, "ulpenabl");
2252
2253         iob = qeth_wait_for_buffer(&card->write);
2254         iob->finalize = qeth_mpc_finalize_cmd;
2255         memcpy(iob->data, ULP_ENABLE, ULP_ENABLE_SIZE);
2256
2257         *(QETH_ULP_ENABLE_LINKNUM(iob->data)) = (u8) card->dev->dev_port;
2258         memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1);
2259         memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data),
2260                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2261         memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data),
2262                &card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH);
2263         rc = qeth_send_control_data(card, ULP_ENABLE_SIZE, iob,
2264                                     qeth_ulp_enable_cb, &max_mtu);
2265         if (rc)
2266                 return rc;
2267         return qeth_update_max_mtu(card, max_mtu);
2268 }
2269
2270 static int qeth_ulp_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2271                 unsigned long data)
2272 {
2273         struct qeth_cmd_buffer *iob;
2274
2275         QETH_DBF_TEXT(SETUP, 2, "ulpstpcb");
2276
2277         iob = (struct qeth_cmd_buffer *) data;
2278         memcpy(&card->token.ulp_connection_r,
2279                QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2280                QETH_MPC_TOKEN_LENGTH);
2281         if (!strncmp("00S", QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2282                      3)) {
2283                 QETH_DBF_TEXT(SETUP, 2, "olmlimit");
2284                 dev_err(&card->gdev->dev, "A connection could not be "
2285                         "established because of an OLM limit\n");
2286                 return -EMLINK;
2287         }
2288         return 0;
2289 }
2290
2291 static int qeth_ulp_setup(struct qeth_card *card)
2292 {
2293         int rc;
2294         __u16 temp;
2295         struct qeth_cmd_buffer *iob;
2296         struct ccw_dev_id dev_id;
2297
2298         QETH_DBF_TEXT(SETUP, 2, "ulpsetup");
2299
2300         iob = qeth_wait_for_buffer(&card->write);
2301         iob->finalize = qeth_mpc_finalize_cmd;
2302         memcpy(iob->data, ULP_SETUP, ULP_SETUP_SIZE);
2303
2304         memcpy(QETH_ULP_SETUP_DEST_ADDR(iob->data),
2305                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2306         memcpy(QETH_ULP_SETUP_CONNECTION_TOKEN(iob->data),
2307                &card->token.ulp_connection_w, QETH_MPC_TOKEN_LENGTH);
2308         memcpy(QETH_ULP_SETUP_FILTER_TOKEN(iob->data),
2309                &card->token.ulp_filter_r, QETH_MPC_TOKEN_LENGTH);
2310
2311         ccw_device_get_id(CARD_DDEV(card), &dev_id);
2312         memcpy(QETH_ULP_SETUP_CUA(iob->data), &dev_id.devno, 2);
2313         temp = (card->info.cula << 8) + card->info.unit_addr2;
2314         memcpy(QETH_ULP_SETUP_REAL_DEVADDR(iob->data), &temp, 2);
2315         rc = qeth_send_control_data(card, ULP_SETUP_SIZE, iob,
2316                                     qeth_ulp_setup_cb, NULL);
2317         return rc;
2318 }
2319
2320 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *q, int bidx)
2321 {
2322         struct qeth_qdio_out_buffer *newbuf;
2323
2324         newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, GFP_ATOMIC);
2325         if (!newbuf)
2326                 return -ENOMEM;
2327
2328         newbuf->buffer = q->qdio_bufs[bidx];
2329         skb_queue_head_init(&newbuf->skb_list);
2330         lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key);
2331         newbuf->q = q;
2332         newbuf->next_pending = q->bufs[bidx];
2333         atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY);
2334         q->bufs[bidx] = newbuf;
2335         return 0;
2336 }
2337
2338 static void qeth_free_output_queue(struct qeth_qdio_out_q *q)
2339 {
2340         if (!q)
2341                 return;
2342
2343         qeth_drain_output_queue(q, true);
2344         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2345         kfree(q);
2346 }
2347
2348 static struct qeth_qdio_out_q *qeth_alloc_output_queue(void)
2349 {
2350         struct qeth_qdio_out_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
2351
2352         if (!q)
2353                 return NULL;
2354
2355         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
2356                 kfree(q);
2357                 return NULL;
2358         }
2359         return q;
2360 }
2361
2362 static int qeth_alloc_qdio_queues(struct qeth_card *card)
2363 {
2364         int i, j;
2365
2366         QETH_DBF_TEXT(SETUP, 2, "allcqdbf");
2367
2368         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED,
2369                 QETH_QDIO_ALLOCATED) != QETH_QDIO_UNINITIALIZED)
2370                 return 0;
2371
2372         QETH_DBF_TEXT(SETUP, 2, "inq");
2373         card->qdio.in_q = qeth_alloc_qdio_queue();
2374         if (!card->qdio.in_q)
2375                 goto out_nomem;
2376
2377         /* inbound buffer pool */
2378         if (qeth_alloc_buffer_pool(card))
2379                 goto out_freeinq;
2380
2381         /* outbound */
2382         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2383                 card->qdio.out_qs[i] = qeth_alloc_output_queue();
2384                 if (!card->qdio.out_qs[i])
2385                         goto out_freeoutq;
2386                 QETH_DBF_TEXT_(SETUP, 2, "outq %i", i);
2387                 QETH_DBF_HEX(SETUP, 2, &card->qdio.out_qs[i], sizeof(void *));
2388                 card->qdio.out_qs[i]->card = card;
2389                 card->qdio.out_qs[i]->queue_no = i;
2390                 /* give outbound qeth_qdio_buffers their qdio_buffers */
2391                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2392                         WARN_ON(card->qdio.out_qs[i]->bufs[j] != NULL);
2393                         if (qeth_init_qdio_out_buf(card->qdio.out_qs[i], j))
2394                                 goto out_freeoutqbufs;
2395                 }
2396         }
2397
2398         /* completion */
2399         if (qeth_alloc_cq(card))
2400                 goto out_freeoutq;
2401
2402         return 0;
2403
2404 out_freeoutqbufs:
2405         while (j > 0) {
2406                 --j;
2407                 kmem_cache_free(qeth_qdio_outbuf_cache,
2408                                 card->qdio.out_qs[i]->bufs[j]);
2409                 card->qdio.out_qs[i]->bufs[j] = NULL;
2410         }
2411 out_freeoutq:
2412         while (i > 0) {
2413                 qeth_free_output_queue(card->qdio.out_qs[--i]);
2414                 card->qdio.out_qs[i] = NULL;
2415         }
2416         qeth_free_buffer_pool(card);
2417 out_freeinq:
2418         qeth_free_qdio_queue(card->qdio.in_q);
2419         card->qdio.in_q = NULL;
2420 out_nomem:
2421         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
2422         return -ENOMEM;
2423 }
2424
2425 static void qeth_free_qdio_queues(struct qeth_card *card)
2426 {
2427         int i, j;
2428
2429         if (atomic_xchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED) ==
2430                 QETH_QDIO_UNINITIALIZED)
2431                 return;
2432
2433         qeth_free_cq(card);
2434         cancel_delayed_work_sync(&card->buffer_reclaim_work);
2435         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2436                 if (card->qdio.in_q->bufs[j].rx_skb)
2437                         dev_kfree_skb_any(card->qdio.in_q->bufs[j].rx_skb);
2438         }
2439         qeth_free_qdio_queue(card->qdio.in_q);
2440         card->qdio.in_q = NULL;
2441         /* inbound buffer pool */
2442         qeth_free_buffer_pool(card);
2443         /* free outbound qdio_qs */
2444         for (i = 0; i < card->qdio.no_out_queues; i++) {
2445                 qeth_free_output_queue(card->qdio.out_qs[i]);
2446                 card->qdio.out_qs[i] = NULL;
2447         }
2448 }
2449
2450 static void qeth_create_qib_param_field(struct qeth_card *card,
2451                 char *param_field)
2452 {
2453
2454         param_field[0] = _ascebc['P'];
2455         param_field[1] = _ascebc['C'];
2456         param_field[2] = _ascebc['I'];
2457         param_field[3] = _ascebc['T'];
2458         *((unsigned int *) (&param_field[4])) = QETH_PCI_THRESHOLD_A(card);
2459         *((unsigned int *) (&param_field[8])) = QETH_PCI_THRESHOLD_B(card);
2460         *((unsigned int *) (&param_field[12])) = QETH_PCI_TIMER_VALUE(card);
2461 }
2462
2463 static void qeth_create_qib_param_field_blkt(struct qeth_card *card,
2464                 char *param_field)
2465 {
2466         param_field[16] = _ascebc['B'];
2467         param_field[17] = _ascebc['L'];
2468         param_field[18] = _ascebc['K'];
2469         param_field[19] = _ascebc['T'];
2470         *((unsigned int *) (&param_field[20])) = card->info.blkt.time_total;
2471         *((unsigned int *) (&param_field[24])) = card->info.blkt.inter_packet;
2472         *((unsigned int *) (&param_field[28])) =
2473                 card->info.blkt.inter_packet_jumbo;
2474 }
2475
2476 static int qeth_qdio_activate(struct qeth_card *card)
2477 {
2478         QETH_DBF_TEXT(SETUP, 3, "qdioact");
2479         return qdio_activate(CARD_DDEV(card));
2480 }
2481
2482 static int qeth_dm_act(struct qeth_card *card)
2483 {
2484         int rc;
2485         struct qeth_cmd_buffer *iob;
2486
2487         QETH_DBF_TEXT(SETUP, 2, "dmact");
2488
2489         iob = qeth_wait_for_buffer(&card->write);
2490         iob->finalize = qeth_mpc_finalize_cmd;
2491         memcpy(iob->data, DM_ACT, DM_ACT_SIZE);
2492
2493         memcpy(QETH_DM_ACT_DEST_ADDR(iob->data),
2494                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2495         memcpy(QETH_DM_ACT_CONNECTION_TOKEN(iob->data),
2496                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2497         rc = qeth_send_control_data(card, DM_ACT_SIZE, iob, NULL, NULL);
2498         return rc;
2499 }
2500
2501 static int qeth_mpc_initialize(struct qeth_card *card)
2502 {
2503         int rc;
2504
2505         QETH_DBF_TEXT(SETUP, 2, "mpcinit");
2506
2507         rc = qeth_issue_next_read(card);
2508         if (rc) {
2509                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
2510                 return rc;
2511         }
2512         rc = qeth_cm_enable(card);
2513         if (rc) {
2514                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
2515                 goto out_qdio;
2516         }
2517         rc = qeth_cm_setup(card);
2518         if (rc) {
2519                 QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
2520                 goto out_qdio;
2521         }
2522         rc = qeth_ulp_enable(card);
2523         if (rc) {
2524                 QETH_DBF_TEXT_(SETUP, 2, "4err%d", rc);
2525                 goto out_qdio;
2526         }
2527         rc = qeth_ulp_setup(card);
2528         if (rc) {
2529                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
2530                 goto out_qdio;
2531         }
2532         rc = qeth_alloc_qdio_queues(card);
2533         if (rc) {
2534                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
2535                 goto out_qdio;
2536         }
2537         rc = qeth_qdio_establish(card);
2538         if (rc) {
2539                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
2540                 qeth_free_qdio_queues(card);
2541                 goto out_qdio;
2542         }
2543         rc = qeth_qdio_activate(card);
2544         if (rc) {
2545                 QETH_DBF_TEXT_(SETUP, 2, "7err%d", rc);
2546                 goto out_qdio;
2547         }
2548         rc = qeth_dm_act(card);
2549         if (rc) {
2550                 QETH_DBF_TEXT_(SETUP, 2, "8err%d", rc);
2551                 goto out_qdio;
2552         }
2553
2554         return 0;
2555 out_qdio:
2556         qeth_qdio_clear_card(card, !IS_IQD(card));
2557         qdio_free(CARD_DDEV(card));
2558         return rc;
2559 }
2560
2561 void qeth_print_status_message(struct qeth_card *card)
2562 {
2563         switch (card->info.type) {
2564         case QETH_CARD_TYPE_OSD:
2565         case QETH_CARD_TYPE_OSM:
2566         case QETH_CARD_TYPE_OSX:
2567                 /* VM will use a non-zero first character
2568                  * to indicate a HiperSockets like reporting
2569                  * of the level OSA sets the first character to zero
2570                  * */
2571                 if (!card->info.mcl_level[0]) {
2572                         sprintf(card->info.mcl_level, "%02x%02x",
2573                                 card->info.mcl_level[2],
2574                                 card->info.mcl_level[3]);
2575                         break;
2576                 }
2577                 /* fallthrough */
2578         case QETH_CARD_TYPE_IQD:
2579                 if (IS_VM_NIC(card) || (card->info.mcl_level[0] & 0x80)) {
2580                         card->info.mcl_level[0] = (char) _ebcasc[(__u8)
2581                                 card->info.mcl_level[0]];
2582                         card->info.mcl_level[1] = (char) _ebcasc[(__u8)
2583                                 card->info.mcl_level[1]];
2584                         card->info.mcl_level[2] = (char) _ebcasc[(__u8)
2585                                 card->info.mcl_level[2]];
2586                         card->info.mcl_level[3] = (char) _ebcasc[(__u8)
2587                                 card->info.mcl_level[3]];
2588                         card->info.mcl_level[QETH_MCL_LENGTH] = 0;
2589                 }
2590                 break;
2591         default:
2592                 memset(&card->info.mcl_level[0], 0, QETH_MCL_LENGTH + 1);
2593         }
2594         dev_info(&card->gdev->dev,
2595                  "Device is a%s card%s%s%s\nwith link type %s.\n",
2596                  qeth_get_cardname(card),
2597                  (card->info.mcl_level[0]) ? " (level: " : "",
2598                  (card->info.mcl_level[0]) ? card->info.mcl_level : "",
2599                  (card->info.mcl_level[0]) ? ")" : "",
2600                  qeth_get_cardname_short(card));
2601 }
2602 EXPORT_SYMBOL_GPL(qeth_print_status_message);
2603
2604 static void qeth_initialize_working_pool_list(struct qeth_card *card)
2605 {
2606         struct qeth_buffer_pool_entry *entry;
2607
2608         QETH_CARD_TEXT(card, 5, "inwrklst");
2609
2610         list_for_each_entry(entry,
2611                             &card->qdio.init_pool.entry_list, init_list) {
2612                 qeth_put_buffer_pool_entry(card, entry);
2613         }
2614 }
2615
2616 static struct qeth_buffer_pool_entry *qeth_find_free_buffer_pool_entry(
2617                                         struct qeth_card *card)
2618 {
2619         struct list_head *plh;
2620         struct qeth_buffer_pool_entry *entry;
2621         int i, free;
2622         struct page *page;
2623
2624         if (list_empty(&card->qdio.in_buf_pool.entry_list))
2625                 return NULL;
2626
2627         list_for_each(plh, &card->qdio.in_buf_pool.entry_list) {
2628                 entry = list_entry(plh, struct qeth_buffer_pool_entry, list);
2629                 free = 1;
2630                 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2631                         if (page_count(virt_to_page(entry->elements[i])) > 1) {
2632                                 free = 0;
2633                                 break;
2634                         }
2635                 }
2636                 if (free) {
2637                         list_del_init(&entry->list);
2638                         return entry;
2639                 }
2640         }
2641
2642         /* no free buffer in pool so take first one and swap pages */
2643         entry = list_entry(card->qdio.in_buf_pool.entry_list.next,
2644                         struct qeth_buffer_pool_entry, list);
2645         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2646                 if (page_count(virt_to_page(entry->elements[i])) > 1) {
2647                         page = alloc_page(GFP_ATOMIC);
2648                         if (!page) {
2649                                 return NULL;
2650                         } else {
2651                                 free_page((unsigned long)entry->elements[i]);
2652                                 entry->elements[i] = page_address(page);
2653                                 QETH_CARD_STAT_INC(card, rx_sg_alloc_page);
2654                         }
2655                 }
2656         }
2657         list_del_init(&entry->list);
2658         return entry;
2659 }
2660
2661 static int qeth_init_input_buffer(struct qeth_card *card,
2662                 struct qeth_qdio_buffer *buf)
2663 {
2664         struct qeth_buffer_pool_entry *pool_entry;
2665         int i;
2666
2667         if ((card->options.cq == QETH_CQ_ENABLED) && (!buf->rx_skb)) {
2668                 buf->rx_skb = netdev_alloc_skb(card->dev,
2669                                                QETH_RX_PULL_LEN + ETH_HLEN);
2670                 if (!buf->rx_skb)
2671                         return 1;
2672         }
2673
2674         pool_entry = qeth_find_free_buffer_pool_entry(card);
2675         if (!pool_entry)
2676                 return 1;
2677
2678         /*
2679          * since the buffer is accessed only from the input_tasklet
2680          * there shouldn't be a need to synchronize; also, since we use
2681          * the QETH_IN_BUF_REQUEUE_THRESHOLD we should never run  out off
2682          * buffers
2683          */
2684
2685         buf->pool_entry = pool_entry;
2686         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2687                 buf->buffer->element[i].length = PAGE_SIZE;
2688                 buf->buffer->element[i].addr =  pool_entry->elements[i];
2689                 if (i == QETH_MAX_BUFFER_ELEMENTS(card) - 1)
2690                         buf->buffer->element[i].eflags = SBAL_EFLAGS_LAST_ENTRY;
2691                 else
2692                         buf->buffer->element[i].eflags = 0;
2693                 buf->buffer->element[i].sflags = 0;
2694         }
2695         return 0;
2696 }
2697
2698 int qeth_init_qdio_queues(struct qeth_card *card)
2699 {
2700         unsigned int i;
2701         int rc;
2702
2703         QETH_DBF_TEXT(SETUP, 2, "initqdqs");
2704
2705         /* inbound queue */
2706         qdio_reset_buffers(card->qdio.in_q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2707         memset(&card->rx, 0, sizeof(struct qeth_rx));
2708         qeth_initialize_working_pool_list(card);
2709         /*give only as many buffers to hardware as we have buffer pool entries*/
2710         for (i = 0; i < card->qdio.in_buf_pool.buf_count - 1; ++i)
2711                 qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]);
2712         card->qdio.in_q->next_buf_to_init =
2713                 card->qdio.in_buf_pool.buf_count - 1;
2714         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0, 0,
2715                      card->qdio.in_buf_pool.buf_count - 1);
2716         if (rc) {
2717                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
2718                 return rc;
2719         }
2720
2721         /* completion */
2722         rc = qeth_cq_init(card);
2723         if (rc) {
2724                 return rc;
2725         }
2726
2727         /* outbound queue */
2728         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2729                 struct qeth_qdio_out_q *queue = card->qdio.out_qs[i];
2730
2731                 qdio_reset_buffers(queue->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2732                 queue->max_elements = QETH_MAX_BUFFER_ELEMENTS(card);
2733                 queue->next_buf_to_fill = 0;
2734                 queue->do_pack = 0;
2735                 atomic_set(&queue->used_buffers, 0);
2736                 atomic_set(&queue->set_pci_flags_count, 0);
2737                 atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
2738         }
2739         return 0;
2740 }
2741 EXPORT_SYMBOL_GPL(qeth_init_qdio_queues);
2742
2743 static __u8 qeth_get_ipa_adp_type(enum qeth_link_types link_type)
2744 {
2745         switch (link_type) {
2746         case QETH_LINK_TYPE_HSTR:
2747                 return 2;
2748         default:
2749                 return 1;
2750         }
2751 }
2752
2753 static void qeth_fill_ipacmd_header(struct qeth_card *card,
2754                                     struct qeth_ipa_cmd *cmd,
2755                                     enum qeth_ipa_cmds command,
2756                                     enum qeth_prot_versions prot)
2757 {
2758         cmd->hdr.command = command;
2759         cmd->hdr.initiator = IPA_CMD_INITIATOR_HOST;
2760         /* cmd->hdr.seqno is set by qeth_send_control_data() */
2761         cmd->hdr.adapter_type = qeth_get_ipa_adp_type(card->info.link_type);
2762         cmd->hdr.rel_adapter_no = (u8) card->dev->dev_port;
2763         cmd->hdr.prim_version_no = IS_LAYER2(card) ? 2 : 1;
2764         cmd->hdr.param_count = 1;
2765         cmd->hdr.prot_version = prot;
2766 }
2767
2768 static void qeth_ipa_finalize_cmd(struct qeth_card *card,
2769                                   struct qeth_cmd_buffer *iob,
2770                                   unsigned int length)
2771 {
2772         qeth_mpc_finalize_cmd(card, iob, length);
2773
2774         /* override with IPA-specific values: */
2775         __ipa_cmd(iob)->hdr.seqno = card->seqno.ipa;
2776         iob->reply->seqno = card->seqno.ipa++;
2777 }
2778
2779 void qeth_prepare_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
2780                           u16 cmd_length)
2781 {
2782         u16 total_length = IPA_PDU_HEADER_SIZE + cmd_length;
2783         u8 prot_type = qeth_mpc_select_prot_type(card);
2784
2785         iob->finalize = qeth_ipa_finalize_cmd;
2786         iob->timeout = QETH_IPA_TIMEOUT;
2787
2788         memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
2789         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &total_length, 2);
2790         memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1);
2791         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &cmd_length, 2);
2792         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &cmd_length, 2);
2793         memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
2794                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2795         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &cmd_length, 2);
2796 }
2797 EXPORT_SYMBOL_GPL(qeth_prepare_ipa_cmd);
2798
2799 struct qeth_cmd_buffer *qeth_get_ipacmd_buffer(struct qeth_card *card,
2800                 enum qeth_ipa_cmds ipacmd, enum qeth_prot_versions prot)
2801 {
2802         struct qeth_cmd_buffer *iob;
2803
2804         iob = qeth_get_buffer(&card->write);
2805         if (iob) {
2806                 qeth_prepare_ipa_cmd(card, iob, sizeof(struct qeth_ipa_cmd));
2807                 qeth_fill_ipacmd_header(card, __ipa_cmd(iob), ipacmd, prot);
2808         } else {
2809                 dev_warn(&card->gdev->dev,
2810                          "The qeth driver ran out of channel command buffers\n");
2811                 QETH_DBF_MESSAGE(1, "device %x ran out of channel command buffers",
2812                                  CARD_DEVID(card));
2813         }
2814
2815         return iob;
2816 }
2817 EXPORT_SYMBOL_GPL(qeth_get_ipacmd_buffer);
2818
2819 static int qeth_send_ipa_cmd_cb(struct qeth_card *card,
2820                                 struct qeth_reply *reply, unsigned long data)
2821 {
2822         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2823
2824         return (cmd->hdr.return_code) ? -EIO : 0;
2825 }
2826
2827 /**
2828  * qeth_send_ipa_cmd() - send an IPA command
2829  *
2830  * See qeth_send_control_data() for explanation of the arguments.
2831  */
2832
2833 int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
2834                 int (*reply_cb)(struct qeth_card *, struct qeth_reply*,
2835                         unsigned long),
2836                 void *reply_param)
2837 {
2838         u16 length;
2839         int rc;
2840
2841         QETH_CARD_TEXT(card, 4, "sendipa");
2842
2843         if (card->read_or_write_problem) {
2844                 qeth_release_buffer(iob->channel, iob);
2845                 return -EIO;
2846         }
2847
2848         if (reply_cb == NULL)
2849                 reply_cb = qeth_send_ipa_cmd_cb;
2850         memcpy(&length, QETH_IPA_PDU_LEN_TOTAL(iob->data), 2);
2851         rc = qeth_send_control_data(card, length, iob, reply_cb, reply_param);
2852         if (rc == -ETIME) {
2853                 qeth_clear_ipacmd_list(card);
2854                 qeth_schedule_recovery(card);
2855         }
2856         return rc;
2857 }
2858 EXPORT_SYMBOL_GPL(qeth_send_ipa_cmd);
2859
2860 static int qeth_send_startlan_cb(struct qeth_card *card,
2861                                  struct qeth_reply *reply, unsigned long data)
2862 {
2863         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2864
2865         if (cmd->hdr.return_code == IPA_RC_LAN_OFFLINE)
2866                 return -ENETDOWN;
2867
2868         return (cmd->hdr.return_code) ? -EIO : 0;
2869 }
2870
2871 static int qeth_send_startlan(struct qeth_card *card)
2872 {
2873         struct qeth_cmd_buffer *iob;
2874
2875         QETH_DBF_TEXT(SETUP, 2, "strtlan");
2876
2877         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_STARTLAN, 0);
2878         if (!iob)
2879                 return -ENOMEM;
2880         return qeth_send_ipa_cmd(card, iob, qeth_send_startlan_cb, NULL);
2881 }
2882
2883 static int qeth_setadpparms_inspect_rc(struct qeth_ipa_cmd *cmd)
2884 {
2885         if (!cmd->hdr.return_code)
2886                 cmd->hdr.return_code =
2887                         cmd->data.setadapterparms.hdr.return_code;
2888         return cmd->hdr.return_code;
2889 }
2890
2891 static int qeth_query_setadapterparms_cb(struct qeth_card *card,
2892                 struct qeth_reply *reply, unsigned long data)
2893 {
2894         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2895
2896         QETH_CARD_TEXT(card, 3, "quyadpcb");
2897         if (qeth_setadpparms_inspect_rc(cmd))
2898                 return -EIO;
2899
2900         if (cmd->data.setadapterparms.data.query_cmds_supp.lan_type & 0x7f) {
2901                 card->info.link_type =
2902                       cmd->data.setadapterparms.data.query_cmds_supp.lan_type;
2903                 QETH_DBF_TEXT_(SETUP, 2, "lnk %d", card->info.link_type);
2904         }
2905         card->options.adp.supported_funcs =
2906                 cmd->data.setadapterparms.data.query_cmds_supp.supported_cmds;
2907         return 0;
2908 }
2909
2910 static struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card,
2911                 __u32 command, __u32 cmdlen)
2912 {
2913         struct qeth_cmd_buffer *iob;
2914         struct qeth_ipa_cmd *cmd;
2915
2916         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SETADAPTERPARMS,
2917                                      QETH_PROT_IPV4);
2918         if (iob) {
2919                 cmd = __ipa_cmd(iob);
2920                 cmd->data.setadapterparms.hdr.cmdlength = cmdlen;
2921                 cmd->data.setadapterparms.hdr.command_code = command;
2922                 cmd->data.setadapterparms.hdr.used_total = 1;
2923                 cmd->data.setadapterparms.hdr.seq_no = 1;
2924         }
2925
2926         return iob;
2927 }
2928
2929 static int qeth_query_setadapterparms(struct qeth_card *card)
2930 {
2931         int rc;
2932         struct qeth_cmd_buffer *iob;
2933
2934         QETH_CARD_TEXT(card, 3, "queryadp");
2935         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_COMMANDS_SUPPORTED,
2936                                    sizeof(struct qeth_ipacmd_setadpparms));
2937         if (!iob)
2938                 return -ENOMEM;
2939         rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL);
2940         return rc;
2941 }
2942
2943 static int qeth_query_ipassists_cb(struct qeth_card *card,
2944                 struct qeth_reply *reply, unsigned long data)
2945 {
2946         struct qeth_ipa_cmd *cmd;
2947
2948         QETH_DBF_TEXT(SETUP, 2, "qipasscb");
2949
2950         cmd = (struct qeth_ipa_cmd *) data;
2951
2952         switch (cmd->hdr.return_code) {
2953         case IPA_RC_SUCCESS:
2954                 break;
2955         case IPA_RC_NOTSUPP:
2956         case IPA_RC_L2_UNSUPPORTED_CMD:
2957                 QETH_DBF_TEXT(SETUP, 2, "ipaunsup");
2958                 card->options.ipa4.supported_funcs |= IPA_SETADAPTERPARMS;
2959                 card->options.ipa6.supported_funcs |= IPA_SETADAPTERPARMS;
2960                 return -EOPNOTSUPP;
2961         default:
2962                 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Unhandled rc=%#x\n",
2963                                  CARD_DEVID(card), cmd->hdr.return_code);
2964                 return -EIO;
2965         }
2966
2967         if (cmd->hdr.prot_version == QETH_PROT_IPV4) {
2968                 card->options.ipa4.supported_funcs = cmd->hdr.ipa_supported;
2969                 card->options.ipa4.enabled_funcs = cmd->hdr.ipa_enabled;
2970         } else if (cmd->hdr.prot_version == QETH_PROT_IPV6) {
2971                 card->options.ipa6.supported_funcs = cmd->hdr.ipa_supported;
2972                 card->options.ipa6.enabled_funcs = cmd->hdr.ipa_enabled;
2973         } else
2974                 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Flawed LIC detected\n",
2975                                  CARD_DEVID(card));
2976         return 0;
2977 }
2978
2979 static int qeth_query_ipassists(struct qeth_card *card,
2980                                 enum qeth_prot_versions prot)
2981 {
2982         int rc;
2983         struct qeth_cmd_buffer *iob;
2984
2985         QETH_DBF_TEXT_(SETUP, 2, "qipassi%i", prot);
2986         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_QIPASSIST, prot);
2987         if (!iob)
2988                 return -ENOMEM;
2989         rc = qeth_send_ipa_cmd(card, iob, qeth_query_ipassists_cb, NULL);
2990         return rc;
2991 }
2992
2993 static int qeth_query_switch_attributes_cb(struct qeth_card *card,
2994                                 struct qeth_reply *reply, unsigned long data)
2995 {
2996         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2997         struct qeth_query_switch_attributes *attrs;
2998         struct qeth_switch_info *sw_info;
2999
3000         QETH_CARD_TEXT(card, 2, "qswiatcb");
3001         if (qeth_setadpparms_inspect_rc(cmd))
3002                 return -EIO;
3003
3004         sw_info = (struct qeth_switch_info *)reply->param;
3005         attrs = &cmd->data.setadapterparms.data.query_switch_attributes;
3006         sw_info->capabilities = attrs->capabilities;
3007         sw_info->settings = attrs->settings;
3008         QETH_CARD_TEXT_(card, 2, "%04x%04x", sw_info->capabilities,
3009                         sw_info->settings);
3010         return 0;
3011 }
3012
3013 int qeth_query_switch_attributes(struct qeth_card *card,
3014                                  struct qeth_switch_info *sw_info)
3015 {
3016         struct qeth_cmd_buffer *iob;
3017
3018         QETH_CARD_TEXT(card, 2, "qswiattr");
3019         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES))
3020                 return -EOPNOTSUPP;
3021         if (!netif_carrier_ok(card->dev))
3022                 return -ENOMEDIUM;
3023         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES,
3024                                 sizeof(struct qeth_ipacmd_setadpparms_hdr));
3025         if (!iob)
3026                 return -ENOMEM;
3027         return qeth_send_ipa_cmd(card, iob,
3028                                 qeth_query_switch_attributes_cb, sw_info);
3029 }
3030
3031 static int qeth_query_setdiagass_cb(struct qeth_card *card,
3032                 struct qeth_reply *reply, unsigned long data)
3033 {
3034         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3035         u16 rc = cmd->hdr.return_code;
3036
3037         if (rc) {
3038                 QETH_CARD_TEXT_(card, 2, "diagq:%x", rc);
3039                 return -EIO;
3040         }
3041
3042         card->info.diagass_support = cmd->data.diagass.ext;
3043         return 0;
3044 }
3045
3046 static int qeth_query_setdiagass(struct qeth_card *card)
3047 {
3048         struct qeth_cmd_buffer *iob;
3049         struct qeth_ipa_cmd    *cmd;
3050
3051         QETH_DBF_TEXT(SETUP, 2, "qdiagass");
3052         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SET_DIAG_ASS, 0);
3053         if (!iob)
3054                 return -ENOMEM;
3055         cmd = __ipa_cmd(iob);
3056         cmd->data.diagass.subcmd_len = 16;
3057         cmd->data.diagass.subcmd = QETH_DIAGS_CMD_QUERY;
3058         return qeth_send_ipa_cmd(card, iob, qeth_query_setdiagass_cb, NULL);
3059 }
3060
3061 static void qeth_get_trap_id(struct qeth_card *card, struct qeth_trap_id *tid)
3062 {
3063         unsigned long info = get_zeroed_page(GFP_KERNEL);
3064         struct sysinfo_2_2_2 *info222 = (struct sysinfo_2_2_2 *)info;
3065         struct sysinfo_3_2_2 *info322 = (struct sysinfo_3_2_2 *)info;
3066         struct ccw_dev_id ccwid;
3067         int level;
3068
3069         tid->chpid = card->info.chpid;
3070         ccw_device_get_id(CARD_RDEV(card), &ccwid);
3071         tid->ssid = ccwid.ssid;
3072         tid->devno = ccwid.devno;
3073         if (!info)
3074                 return;
3075         level = stsi(NULL, 0, 0, 0);
3076         if ((level >= 2) && (stsi(info222, 2, 2, 2) == 0))
3077                 tid->lparnr = info222->lpar_number;
3078         if ((level >= 3) && (stsi(info322, 3, 2, 2) == 0)) {
3079                 EBCASC(info322->vm[0].name, sizeof(info322->vm[0].name));
3080                 memcpy(tid->vmname, info322->vm[0].name, sizeof(tid->vmname));
3081         }
3082         free_page(info);
3083         return;
3084 }
3085
3086 static int qeth_hw_trap_cb(struct qeth_card *card,
3087                 struct qeth_reply *reply, unsigned long data)
3088 {
3089         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3090         u16 rc = cmd->hdr.return_code;
3091
3092         if (rc) {
3093                 QETH_CARD_TEXT_(card, 2, "trapc:%x", rc);
3094                 return -EIO;
3095         }
3096         return 0;
3097 }
3098
3099 int qeth_hw_trap(struct qeth_card *card, enum qeth_diags_trap_action action)
3100 {
3101         struct qeth_cmd_buffer *iob;
3102         struct qeth_ipa_cmd *cmd;
3103
3104         QETH_DBF_TEXT(SETUP, 2, "diagtrap");
3105         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SET_DIAG_ASS, 0);
3106         if (!iob)
3107                 return -ENOMEM;
3108         cmd = __ipa_cmd(iob);
3109         cmd->data.diagass.subcmd_len = 80;
3110         cmd->data.diagass.subcmd = QETH_DIAGS_CMD_TRAP;
3111         cmd->data.diagass.type = 1;
3112         cmd->data.diagass.action = action;
3113         switch (action) {
3114         case QETH_DIAGS_TRAP_ARM:
3115                 cmd->data.diagass.options = 0x0003;
3116                 cmd->data.diagass.ext = 0x00010000 +
3117                         sizeof(struct qeth_trap_id);
3118                 qeth_get_trap_id(card,
3119                         (struct qeth_trap_id *)cmd->data.diagass.cdata);
3120                 break;
3121         case QETH_DIAGS_TRAP_DISARM:
3122                 cmd->data.diagass.options = 0x0001;
3123                 break;
3124         case QETH_DIAGS_TRAP_CAPTURE:
3125                 break;
3126         }
3127         return qeth_send_ipa_cmd(card, iob, qeth_hw_trap_cb, NULL);
3128 }
3129 EXPORT_SYMBOL_GPL(qeth_hw_trap);
3130
3131 static int qeth_check_qdio_errors(struct qeth_card *card,
3132                                   struct qdio_buffer *buf,
3133                                   unsigned int qdio_error,
3134                                   const char *dbftext)
3135 {
3136         if (qdio_error) {
3137                 QETH_CARD_TEXT(card, 2, dbftext);
3138                 QETH_CARD_TEXT_(card, 2, " F15=%02X",
3139                                buf->element[15].sflags);
3140                 QETH_CARD_TEXT_(card, 2, " F14=%02X",
3141                                buf->element[14].sflags);
3142                 QETH_CARD_TEXT_(card, 2, " qerr=%X", qdio_error);
3143                 if ((buf->element[15].sflags) == 0x12) {
3144                         QETH_CARD_STAT_INC(card, rx_dropped);
3145                         return 0;
3146                 } else
3147                         return 1;
3148         }
3149         return 0;
3150 }
3151
3152 static void qeth_queue_input_buffer(struct qeth_card *card, int index)
3153 {
3154         struct qeth_qdio_q *queue = card->qdio.in_q;
3155         struct list_head *lh;
3156         int count;
3157         int i;
3158         int rc;
3159         int newcount = 0;
3160
3161         count = (index < queue->next_buf_to_init)?
3162                 card->qdio.in_buf_pool.buf_count -
3163                 (queue->next_buf_to_init - index) :
3164                 card->qdio.in_buf_pool.buf_count -
3165                 (queue->next_buf_to_init + QDIO_MAX_BUFFERS_PER_Q - index);
3166         /* only requeue at a certain threshold to avoid SIGAs */
3167         if (count >= QETH_IN_BUF_REQUEUE_THRESHOLD(card)) {
3168                 for (i = queue->next_buf_to_init;
3169                      i < queue->next_buf_to_init + count; ++i) {
3170                         if (qeth_init_input_buffer(card,
3171                                 &queue->bufs[i % QDIO_MAX_BUFFERS_PER_Q])) {
3172                                 break;
3173                         } else {
3174                                 newcount++;
3175                         }
3176                 }
3177
3178                 if (newcount < count) {
3179                         /* we are in memory shortage so we switch back to
3180                            traditional skb allocation and drop packages */
3181                         atomic_set(&card->force_alloc_skb, 3);
3182                         count = newcount;
3183                 } else {
3184                         atomic_add_unless(&card->force_alloc_skb, -1, 0);
3185                 }
3186
3187                 if (!count) {
3188                         i = 0;
3189                         list_for_each(lh, &card->qdio.in_buf_pool.entry_list)
3190                                 i++;
3191                         if (i == card->qdio.in_buf_pool.buf_count) {
3192                                 QETH_CARD_TEXT(card, 2, "qsarbw");
3193                                 card->reclaim_index = index;
3194                                 schedule_delayed_work(
3195                                         &card->buffer_reclaim_work,
3196                                         QETH_RECLAIM_WORK_TIME);
3197                         }
3198                         return;
3199                 }
3200
3201                 /*
3202                  * according to old code it should be avoided to requeue all
3203                  * 128 buffers in order to benefit from PCI avoidance.
3204                  * this function keeps at least one buffer (the buffer at
3205                  * 'index') un-requeued -> this buffer is the first buffer that
3206                  * will be requeued the next time
3207                  */
3208                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0,
3209                              queue->next_buf_to_init, count);
3210                 if (rc) {
3211                         QETH_CARD_TEXT(card, 2, "qinberr");
3212                 }
3213                 queue->next_buf_to_init = (queue->next_buf_to_init + count) %
3214                                           QDIO_MAX_BUFFERS_PER_Q;
3215         }
3216 }
3217
3218 static void qeth_buffer_reclaim_work(struct work_struct *work)
3219 {
3220         struct qeth_card *card = container_of(work, struct qeth_card,
3221                 buffer_reclaim_work.work);
3222
3223         QETH_CARD_TEXT_(card, 2, "brw:%x", card->reclaim_index);
3224         qeth_queue_input_buffer(card, card->reclaim_index);
3225 }
3226
3227 static void qeth_handle_send_error(struct qeth_card *card,
3228                 struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err)
3229 {
3230         int sbalf15 = buffer->buffer->element[15].sflags;
3231
3232         QETH_CARD_TEXT(card, 6, "hdsnderr");
3233         if (IS_IQD(card)) {
3234                 if (sbalf15 == 0) {
3235                         qdio_err = 0;
3236                 } else {
3237                         qdio_err = 1;
3238                 }
3239         }
3240         qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr");
3241
3242         if (!qdio_err)
3243                 return;
3244
3245         if ((sbalf15 >= 15) && (sbalf15 <= 31))
3246                 return;
3247
3248         QETH_CARD_TEXT(card, 1, "lnkfail");
3249         QETH_CARD_TEXT_(card, 1, "%04x %02x",
3250                        (u16)qdio_err, (u8)sbalf15);
3251 }
3252
3253 /**
3254  * qeth_prep_flush_pack_buffer - Prepares flushing of a packing buffer.
3255  * @queue: queue to check for packing buffer
3256  *
3257  * Returns number of buffers that were prepared for flush.
3258  */
3259 static int qeth_prep_flush_pack_buffer(struct qeth_qdio_out_q *queue)
3260 {
3261         struct qeth_qdio_out_buffer *buffer;
3262
3263         buffer = queue->bufs[queue->next_buf_to_fill];
3264         if ((atomic_read(&buffer->state) == QETH_QDIO_BUF_EMPTY) &&
3265             (buffer->next_element_to_fill > 0)) {
3266                 /* it's a packing buffer */
3267                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3268                 queue->next_buf_to_fill =
3269                         (queue->next_buf_to_fill + 1) % QDIO_MAX_BUFFERS_PER_Q;
3270                 return 1;
3271         }
3272         return 0;
3273 }
3274
3275 /*
3276  * Switched to packing state if the number of used buffers on a queue
3277  * reaches a certain limit.
3278  */
3279 static void qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q *queue)
3280 {
3281         if (!queue->do_pack) {
3282                 if (atomic_read(&queue->used_buffers)
3283                     >= QETH_HIGH_WATERMARK_PACK){
3284                         /* switch non-PACKING -> PACKING */
3285                         QETH_CARD_TEXT(queue->card, 6, "np->pack");
3286                         QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3287                         queue->do_pack = 1;
3288                 }
3289         }
3290 }
3291
3292 /*
3293  * Switches from packing to non-packing mode. If there is a packing
3294  * buffer on the queue this buffer will be prepared to be flushed.
3295  * In that case 1 is returned to inform the caller. If no buffer
3296  * has to be flushed, zero is returned.
3297  */
3298 static int qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q *queue)
3299 {
3300         if (queue->do_pack) {
3301                 if (atomic_read(&queue->used_buffers)
3302                     <= QETH_LOW_WATERMARK_PACK) {
3303                         /* switch PACKING -> non-PACKING */
3304                         QETH_CARD_TEXT(queue->card, 6, "pack->np");
3305                         QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3306                         queue->do_pack = 0;
3307                         return qeth_prep_flush_pack_buffer(queue);
3308                 }
3309         }
3310         return 0;
3311 }
3312
3313 static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
3314                                int count)
3315 {
3316         struct qeth_qdio_out_buffer *buf;
3317         int rc;
3318         int i;
3319         unsigned int qdio_flags;
3320
3321         for (i = index; i < index + count; ++i) {
3322                 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3323                 buf = queue->bufs[bidx];
3324                 buf->buffer->element[buf->next_element_to_fill - 1].eflags |=
3325                                 SBAL_EFLAGS_LAST_ENTRY;
3326
3327                 if (queue->bufstates)
3328                         queue->bufstates[bidx].user = buf;
3329
3330                 if (IS_IQD(queue->card))
3331                         continue;
3332
3333                 if (!queue->do_pack) {
3334                         if ((atomic_read(&queue->used_buffers) >=
3335                                 (QETH_HIGH_WATERMARK_PACK -
3336                                  QETH_WATERMARK_PACK_FUZZ)) &&
3337                             !atomic_read(&queue->set_pci_flags_count)) {
3338                                 /* it's likely that we'll go to packing
3339                                  * mode soon */
3340                                 atomic_inc(&queue->set_pci_flags_count);
3341                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3342                         }
3343                 } else {
3344                         if (!atomic_read(&queue->set_pci_flags_count)) {
3345                                 /*
3346                                  * there's no outstanding PCI any more, so we
3347                                  * have to request a PCI to be sure the the PCI
3348                                  * will wake at some time in the future then we
3349                                  * can flush packed buffers that might still be
3350                                  * hanging around, which can happen if no
3351                                  * further send was requested by the stack
3352                                  */
3353                                 atomic_inc(&queue->set_pci_flags_count);
3354                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3355                         }
3356                 }
3357         }
3358
3359         QETH_TXQ_STAT_ADD(queue, bufs, count);
3360         qdio_flags = QDIO_FLAG_SYNC_OUTPUT;
3361         if (atomic_read(&queue->set_pci_flags_count))
3362                 qdio_flags |= QDIO_FLAG_PCI_OUT;
3363         rc = do_QDIO(CARD_DDEV(queue->card), qdio_flags,
3364                      queue->queue_no, index, count);
3365         if (rc) {
3366                 QETH_TXQ_STAT_ADD(queue, tx_errors, count);
3367                 /* ignore temporary SIGA errors without busy condition */
3368                 if (rc == -ENOBUFS)
3369                         return;
3370                 QETH_CARD_TEXT(queue->card, 2, "flushbuf");
3371                 QETH_CARD_TEXT_(queue->card, 2, " q%d", queue->queue_no);
3372                 QETH_CARD_TEXT_(queue->card, 2, " idx%d", index);
3373                 QETH_CARD_TEXT_(queue->card, 2, " c%d", count);
3374                 QETH_CARD_TEXT_(queue->card, 2, " err%d", rc);
3375
3376                 /* this must not happen under normal circumstances. if it
3377                  * happens something is really wrong -> recover */
3378                 qeth_schedule_recovery(queue->card);
3379                 return;
3380         }
3381 }
3382
3383 static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue)
3384 {
3385         int index;
3386         int flush_cnt = 0;
3387         int q_was_packing = 0;
3388
3389         /*
3390          * check if weed have to switch to non-packing mode or if
3391          * we have to get a pci flag out on the queue
3392          */
3393         if ((atomic_read(&queue->used_buffers) <= QETH_LOW_WATERMARK_PACK) ||
3394             !atomic_read(&queue->set_pci_flags_count)) {
3395                 if (atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH) ==
3396                                 QETH_OUT_Q_UNLOCKED) {
3397                         /*
3398                          * If we get in here, there was no action in
3399                          * do_send_packet. So, we check if there is a
3400                          * packing buffer to be flushed here.
3401                          */
3402                         index = queue->next_buf_to_fill;
3403                         q_was_packing = queue->do_pack;
3404                         /* queue->do_pack may change */
3405                         barrier();
3406                         flush_cnt += qeth_switch_to_nonpacking_if_needed(queue);
3407                         if (!flush_cnt &&
3408                             !atomic_read(&queue->set_pci_flags_count))
3409                                 flush_cnt += qeth_prep_flush_pack_buffer(queue);
3410                         if (q_was_packing)
3411                                 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_cnt);
3412                         if (flush_cnt)
3413                                 qeth_flush_buffers(queue, index, flush_cnt);
3414                         atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
3415                 }
3416         }
3417 }
3418
3419 static void qeth_qdio_start_poll(struct ccw_device *ccwdev, int queue,
3420                                  unsigned long card_ptr)
3421 {
3422         struct qeth_card *card = (struct qeth_card *)card_ptr;
3423
3424         if (card->dev->flags & IFF_UP)
3425                 napi_schedule(&card->napi);
3426 }
3427
3428 int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq)
3429 {
3430         int rc;
3431
3432         if (card->options.cq ==  QETH_CQ_NOTAVAILABLE) {
3433                 rc = -1;
3434                 goto out;
3435         } else {
3436                 if (card->options.cq == cq) {
3437                         rc = 0;
3438                         goto out;
3439                 }
3440
3441                 if (card->state != CARD_STATE_DOWN) {
3442                         rc = -1;
3443                         goto out;
3444                 }
3445
3446                 qeth_free_qdio_queues(card);
3447                 card->options.cq = cq;
3448                 rc = 0;
3449         }
3450 out:
3451         return rc;
3452
3453 }
3454 EXPORT_SYMBOL_GPL(qeth_configure_cq);
3455
3456 static void qeth_qdio_cq_handler(struct qeth_card *card, unsigned int qdio_err,
3457                                  unsigned int queue, int first_element,
3458                                  int count)
3459 {
3460         struct qeth_qdio_q *cq = card->qdio.c_q;
3461         int i;
3462         int rc;
3463
3464         if (!qeth_is_cq(card, queue))
3465                 return;
3466
3467         QETH_CARD_TEXT_(card, 5, "qcqhe%d", first_element);
3468         QETH_CARD_TEXT_(card, 5, "qcqhc%d", count);
3469         QETH_CARD_TEXT_(card, 5, "qcqherr%d", qdio_err);
3470
3471         if (qdio_err) {
3472                 netif_tx_stop_all_queues(card->dev);
3473                 qeth_schedule_recovery(card);
3474                 return;
3475         }
3476
3477         for (i = first_element; i < first_element + count; ++i) {
3478                 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3479                 struct qdio_buffer *buffer = cq->qdio_bufs[bidx];
3480                 int e = 0;
3481
3482                 while ((e < QDIO_MAX_ELEMENTS_PER_BUFFER) &&
3483                        buffer->element[e].addr) {
3484                         unsigned long phys_aob_addr;
3485
3486                         phys_aob_addr = (unsigned long) buffer->element[e].addr;
3487                         qeth_qdio_handle_aob(card, phys_aob_addr);
3488                         ++e;
3489                 }
3490                 qeth_scrub_qdio_buffer(buffer, QDIO_MAX_ELEMENTS_PER_BUFFER);
3491         }
3492         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, queue,
3493                     card->qdio.c_q->next_buf_to_init,
3494                     count);
3495         if (rc) {
3496                 dev_warn(&card->gdev->dev,
3497                         "QDIO reported an error, rc=%i\n", rc);
3498                 QETH_CARD_TEXT(card, 2, "qcqherr");
3499         }
3500         card->qdio.c_q->next_buf_to_init = (card->qdio.c_q->next_buf_to_init
3501                                    + count) % QDIO_MAX_BUFFERS_PER_Q;
3502 }
3503
3504 static void qeth_qdio_input_handler(struct ccw_device *ccwdev,
3505                                     unsigned int qdio_err, int queue,
3506                                     int first_elem, int count,
3507                                     unsigned long card_ptr)
3508 {
3509         struct qeth_card *card = (struct qeth_card *)card_ptr;
3510
3511         QETH_CARD_TEXT_(card, 2, "qihq%d", queue);
3512         QETH_CARD_TEXT_(card, 2, "qiec%d", qdio_err);
3513
3514         if (qeth_is_cq(card, queue))
3515                 qeth_qdio_cq_handler(card, qdio_err, queue, first_elem, count);
3516         else if (qdio_err)
3517                 qeth_schedule_recovery(card);
3518 }
3519
3520 static void qeth_qdio_output_handler(struct ccw_device *ccwdev,
3521                                      unsigned int qdio_error, int __queue,
3522                                      int first_element, int count,
3523                                      unsigned long card_ptr)
3524 {
3525         struct qeth_card *card        = (struct qeth_card *) card_ptr;
3526         struct qeth_qdio_out_q *queue = card->qdio.out_qs[__queue];
3527         struct qeth_qdio_out_buffer *buffer;
3528         struct net_device *dev = card->dev;
3529         struct netdev_queue *txq;
3530         int i;
3531
3532         QETH_CARD_TEXT(card, 6, "qdouhdl");
3533         if (qdio_error & QDIO_ERROR_FATAL) {
3534                 QETH_CARD_TEXT(card, 2, "achkcond");
3535                 netif_tx_stop_all_queues(dev);
3536                 qeth_schedule_recovery(card);
3537                 return;
3538         }
3539
3540         for (i = first_element; i < (first_element + count); ++i) {
3541                 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3542                 buffer = queue->bufs[bidx];
3543                 qeth_handle_send_error(card, buffer, qdio_error);
3544
3545                 if (queue->bufstates &&
3546                     (queue->bufstates[bidx].flags &
3547                      QDIO_OUTBUF_STATE_FLAG_PENDING) != 0) {
3548                         WARN_ON_ONCE(card->options.cq != QETH_CQ_ENABLED);
3549
3550                         if (atomic_cmpxchg(&buffer->state,
3551                                            QETH_QDIO_BUF_PRIMED,
3552                                            QETH_QDIO_BUF_PENDING) ==
3553                                 QETH_QDIO_BUF_PRIMED) {
3554                                 qeth_notify_skbs(queue, buffer,
3555                                                  TX_NOTIFY_PENDING);
3556                         }
3557                         QETH_CARD_TEXT_(queue->card, 5, "pel%d", bidx);
3558
3559                         /* prepare the queue slot for re-use: */
3560                         qeth_scrub_qdio_buffer(buffer->buffer,
3561                                                queue->max_elements);
3562                         if (qeth_init_qdio_out_buf(queue, bidx)) {
3563                                 QETH_CARD_TEXT(card, 2, "outofbuf");
3564                                 qeth_schedule_recovery(card);
3565                         }
3566                 } else {
3567                         if (card->options.cq == QETH_CQ_ENABLED) {
3568                                 enum iucv_tx_notify n;
3569
3570                                 n = qeth_compute_cq_notification(
3571                                         buffer->buffer->element[15].sflags, 0);
3572                                 qeth_notify_skbs(queue, buffer, n);
3573                         }
3574
3575                         qeth_clear_output_buffer(queue, buffer);
3576                 }
3577                 qeth_cleanup_handled_pending(queue, bidx, 0);
3578         }
3579         atomic_sub(count, &queue->used_buffers);
3580         /* check if we need to do something on this outbound queue */
3581         if (!IS_IQD(card))
3582                 qeth_check_outbound_queue(queue);
3583
3584         if (IS_IQD(card))
3585                 __queue = qeth_iqd_translate_txq(dev, __queue);
3586         txq = netdev_get_tx_queue(dev, __queue);
3587         /* xmit may have observed the full-condition, but not yet stopped the
3588          * txq. In which case the code below won't trigger. So before returning,
3589          * xmit will re-check the txq's fill level and wake it up if needed.
3590          */
3591         if (netif_tx_queue_stopped(txq) && !qeth_out_queue_is_full(queue))
3592                 netif_tx_wake_queue(txq);
3593 }
3594
3595 /**
3596  * Note: Function assumes that we have 4 outbound queues.
3597  */
3598 int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb)
3599 {
3600         struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
3601         u8 tos;
3602
3603         switch (card->qdio.do_prio_queueing) {
3604         case QETH_PRIO_Q_ING_TOS:
3605         case QETH_PRIO_Q_ING_PREC:
3606                 switch (qeth_get_ip_version(skb)) {
3607                 case 4:
3608                         tos = ipv4_get_dsfield(ip_hdr(skb));
3609                         break;
3610                 case 6:
3611                         tos = ipv6_get_dsfield(ipv6_hdr(skb));
3612                         break;
3613                 default:
3614                         return card->qdio.default_out_queue;
3615                 }
3616                 if (card->qdio.do_prio_queueing == QETH_PRIO_Q_ING_PREC)
3617                         return ~tos >> 6 & 3;
3618                 if (tos & IPTOS_MINCOST)
3619                         return 3;
3620                 if (tos & IPTOS_RELIABILITY)
3621                         return 2;
3622                 if (tos & IPTOS_THROUGHPUT)
3623                         return 1;
3624                 if (tos & IPTOS_LOWDELAY)
3625                         return 0;
3626                 break;
3627         case QETH_PRIO_Q_ING_SKB:
3628                 if (skb->priority > 5)
3629                         return 0;
3630                 return ~skb->priority >> 1 & 3;
3631         case QETH_PRIO_Q_ING_VLAN:
3632                 if (veth->h_vlan_proto == htons(ETH_P_8021Q))
3633                         return ~ntohs(veth->h_vlan_TCI) >>
3634                                (VLAN_PRIO_SHIFT + 1) & 3;
3635                 break;
3636         default:
3637                 break;
3638         }
3639         return card->qdio.default_out_queue;
3640 }
3641 EXPORT_SYMBOL_GPL(qeth_get_priority_queue);
3642
3643 /**
3644  * qeth_get_elements_for_frags() -      find number of SBALEs for skb frags.
3645  * @skb:                                SKB address
3646  *
3647  * Returns the number of pages, and thus QDIO buffer elements, needed to cover
3648  * fragmented part of the SKB. Returns zero for linear SKB.
3649  */
3650 static int qeth_get_elements_for_frags(struct sk_buff *skb)
3651 {
3652         int cnt, elements = 0;
3653
3654         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3655                 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[cnt];
3656
3657                 elements += qeth_get_elements_for_range(
3658                         (addr_t)skb_frag_address(frag),
3659                         (addr_t)skb_frag_address(frag) + skb_frag_size(frag));
3660         }
3661         return elements;
3662 }
3663
3664 /**
3665  * qeth_count_elements() -      Counts the number of QDIO buffer elements needed
3666  *                              to transmit an skb.
3667  * @skb:                        the skb to operate on.
3668  * @data_offset:                skip this part of the skb's linear data
3669  *
3670  * Returns the number of pages, and thus QDIO buffer elements, needed to map the
3671  * skb's data (both its linear part and paged fragments).
3672  */
3673 unsigned int qeth_count_elements(struct sk_buff *skb, unsigned int data_offset)
3674 {
3675         unsigned int elements = qeth_get_elements_for_frags(skb);
3676         addr_t end = (addr_t)skb->data + skb_headlen(skb);
3677         addr_t start = (addr_t)skb->data + data_offset;
3678
3679         if (start != end)
3680                 elements += qeth_get_elements_for_range(start, end);
3681         return elements;
3682 }
3683 EXPORT_SYMBOL_GPL(qeth_count_elements);
3684
3685 #define QETH_HDR_CACHE_OBJ_SIZE         (sizeof(struct qeth_hdr_tso) + \
3686                                          MAX_TCP_HEADER)
3687
3688 /**
3689  * qeth_add_hw_header() - add a HW header to an skb.
3690  * @skb: skb that the HW header should be added to.
3691  * @hdr: double pointer to a qeth_hdr. When returning with >= 0,
3692  *       it contains a valid pointer to a qeth_hdr.
3693  * @hdr_len: length of the HW header.
3694  * @proto_len: length of protocol headers that need to be in same page as the
3695  *             HW header.
3696  *
3697  * Returns the pushed length. If the header can't be pushed on
3698  * (eg. because it would cross a page boundary), it is allocated from
3699  * the cache instead and 0 is returned.
3700  * The number of needed buffer elements is returned in @elements.
3701  * Error to create the hdr is indicated by returning with < 0.
3702  */
3703 static int qeth_add_hw_header(struct qeth_qdio_out_q *queue,
3704                               struct sk_buff *skb, struct qeth_hdr **hdr,
3705                               unsigned int hdr_len, unsigned int proto_len,
3706                               unsigned int *elements)
3707 {
3708         const unsigned int contiguous = proto_len ? proto_len : 1;
3709         const unsigned int max_elements = queue->max_elements;
3710         unsigned int __elements;
3711         addr_t start, end;
3712         bool push_ok;
3713         int rc;
3714
3715 check_layout:
3716         start = (addr_t)skb->data - hdr_len;
3717         end = (addr_t)skb->data;
3718
3719         if (qeth_get_elements_for_range(start, end + contiguous) == 1) {
3720                 /* Push HW header into same page as first protocol header. */
3721                 push_ok = true;
3722                 /* ... but TSO always needs a separate element for headers: */
3723                 if (skb_is_gso(skb))
3724                         __elements = 1 + qeth_count_elements(skb, proto_len);
3725                 else
3726                         __elements = qeth_count_elements(skb, 0);
3727         } else if (!proto_len && qeth_get_elements_for_range(start, end) == 1) {
3728                 /* Push HW header into a new page. */
3729                 push_ok = true;
3730                 __elements = 1 + qeth_count_elements(skb, 0);
3731         } else {
3732                 /* Use header cache, copy protocol headers up. */
3733                 push_ok = false;
3734                 __elements = 1 + qeth_count_elements(skb, proto_len);
3735         }
3736
3737         /* Compress skb to fit into one IO buffer: */
3738         if (__elements > max_elements) {
3739                 if (!skb_is_nonlinear(skb)) {
3740                         /* Drop it, no easy way of shrinking it further. */
3741                         QETH_DBF_MESSAGE(2, "Dropped an oversized skb (Max Elements=%u / Actual=%u / Length=%u).\n",
3742                                          max_elements, __elements, skb->len);
3743                         return -E2BIG;
3744                 }
3745
3746                 rc = skb_linearize(skb);
3747                 if (rc) {
3748                         QETH_TXQ_STAT_INC(queue, skbs_linearized_fail);
3749                         return rc;
3750                 }
3751
3752                 QETH_TXQ_STAT_INC(queue, skbs_linearized);
3753                 /* Linearization changed the layout, re-evaluate: */
3754                 goto check_layout;
3755         }
3756
3757         *elements = __elements;
3758         /* Add the header: */
3759         if (push_ok) {
3760                 *hdr = skb_push(skb, hdr_len);
3761                 return hdr_len;
3762         }
3763         /* fall back */
3764         if (hdr_len + proto_len > QETH_HDR_CACHE_OBJ_SIZE)
3765                 return -E2BIG;
3766         *hdr = kmem_cache_alloc(qeth_core_header_cache, GFP_ATOMIC);
3767         if (!*hdr)
3768                 return -ENOMEM;
3769         /* Copy protocol headers behind HW header: */
3770         skb_copy_from_linear_data(skb, ((char *)*hdr) + hdr_len, proto_len);
3771         return 0;
3772 }
3773
3774 static void __qeth_fill_buffer(struct sk_buff *skb,
3775                                struct qeth_qdio_out_buffer *buf,
3776                                bool is_first_elem, unsigned int offset)
3777 {
3778         struct qdio_buffer *buffer = buf->buffer;
3779         int element = buf->next_element_to_fill;
3780         int length = skb_headlen(skb) - offset;
3781         char *data = skb->data + offset;
3782         int length_here, cnt;
3783
3784         /* map linear part into buffer element(s) */
3785         while (length > 0) {
3786                 /* length_here is the remaining amount of data in this page */
3787                 length_here = PAGE_SIZE - ((unsigned long) data % PAGE_SIZE);
3788                 if (length < length_here)
3789                         length_here = length;
3790
3791                 buffer->element[element].addr = data;
3792                 buffer->element[element].length = length_here;
3793                 length -= length_here;
3794                 if (is_first_elem) {
3795                         is_first_elem = false;
3796                         if (length || skb_is_nonlinear(skb))
3797                                 /* skb needs additional elements */
3798                                 buffer->element[element].eflags =
3799                                         SBAL_EFLAGS_FIRST_FRAG;
3800                         else
3801                                 buffer->element[element].eflags = 0;
3802                 } else {
3803                         buffer->element[element].eflags =
3804                                 SBAL_EFLAGS_MIDDLE_FRAG;
3805                 }
3806                 data += length_here;
3807                 element++;
3808         }
3809
3810         /* map page frags into buffer element(s) */
3811         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3812                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
3813
3814                 data = skb_frag_address(frag);
3815                 length = skb_frag_size(frag);
3816                 while (length > 0) {
3817                         length_here = PAGE_SIZE -
3818                                 ((unsigned long) data % PAGE_SIZE);
3819                         if (length < length_here)
3820                                 length_here = length;
3821
3822                         buffer->element[element].addr = data;
3823                         buffer->element[element].length = length_here;
3824                         buffer->element[element].eflags =
3825                                 SBAL_EFLAGS_MIDDLE_FRAG;
3826                         length -= length_here;
3827                         data += length_here;
3828                         element++;
3829                 }
3830         }
3831
3832         if (buffer->element[element - 1].eflags)
3833                 buffer->element[element - 1].eflags = SBAL_EFLAGS_LAST_FRAG;
3834         buf->next_element_to_fill = element;
3835 }
3836
3837 /**
3838  * qeth_fill_buffer() - map skb into an output buffer
3839  * @queue:      QDIO queue to submit the buffer on
3840  * @buf:        buffer to transport the skb
3841  * @skb:        skb to map into the buffer
3842  * @hdr:        qeth_hdr for this skb. Either at skb->data, or allocated
3843  *              from qeth_core_header_cache.
3844  * @offset:     when mapping the skb, start at skb->data + offset
3845  * @hd_len:     if > 0, build a dedicated header element of this size
3846  * flush:       Prepare the buffer to be flushed, regardless of its fill level.
3847  */
3848 static int qeth_fill_buffer(struct qeth_qdio_out_q *queue,
3849                             struct qeth_qdio_out_buffer *buf,
3850                             struct sk_buff *skb, struct qeth_hdr *hdr,
3851                             unsigned int offset, unsigned int hd_len,
3852                             bool flush)
3853 {
3854         struct qdio_buffer *buffer = buf->buffer;
3855         bool is_first_elem = true;
3856
3857         __skb_queue_tail(&buf->skb_list, skb);
3858
3859         /* build dedicated header element */
3860         if (hd_len) {
3861                 int element = buf->next_element_to_fill;
3862                 is_first_elem = false;
3863
3864                 buffer->element[element].addr = hdr;
3865                 buffer->element[element].length = hd_len;
3866                 buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
3867                 /* remember to free cache-allocated qeth_hdr: */
3868                 buf->is_header[element] = ((void *)hdr != skb->data);
3869                 buf->next_element_to_fill++;
3870         }
3871
3872         __qeth_fill_buffer(skb, buf, is_first_elem, offset);
3873
3874         if (!queue->do_pack) {
3875                 QETH_CARD_TEXT(queue->card, 6, "fillbfnp");
3876         } else {
3877                 QETH_CARD_TEXT(queue->card, 6, "fillbfpa");
3878
3879                 QETH_TXQ_STAT_INC(queue, skbs_pack);
3880                 /* If the buffer still has free elements, keep using it. */
3881                 if (!flush &&
3882                     buf->next_element_to_fill < queue->max_elements)
3883                         return 0;
3884         }
3885
3886         /* flush out the buffer */
3887         atomic_set(&buf->state, QETH_QDIO_BUF_PRIMED);
3888         queue->next_buf_to_fill = (queue->next_buf_to_fill + 1) %
3889                                   QDIO_MAX_BUFFERS_PER_Q;
3890         return 1;
3891 }
3892
3893 static int qeth_do_send_packet_fast(struct qeth_qdio_out_q *queue,
3894                                     struct sk_buff *skb, struct qeth_hdr *hdr,
3895                                     unsigned int offset, unsigned int hd_len)
3896 {
3897         int index = queue->next_buf_to_fill;
3898         struct qeth_qdio_out_buffer *buffer = queue->bufs[index];
3899         struct netdev_queue *txq;
3900         bool stopped = false;
3901
3902         /* Just a sanity check, the wake/stop logic should ensure that we always
3903          * get a free buffer.
3904          */
3905         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
3906                 return -EBUSY;
3907
3908         txq = netdev_get_tx_queue(queue->card->dev, skb_get_queue_mapping(skb));
3909
3910         if (atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
3911                 /* If a TX completion happens right _here_ and misses to wake
3912                  * the txq, then our re-check below will catch the race.
3913                  */
3914                 QETH_TXQ_STAT_INC(queue, stopped);
3915                 netif_tx_stop_queue(txq);
3916                 stopped = true;
3917         }
3918
3919         qeth_fill_buffer(queue, buffer, skb, hdr, offset, hd_len, stopped);
3920         qeth_flush_buffers(queue, index, 1);
3921
3922         if (stopped && !qeth_out_queue_is_full(queue))
3923                 netif_tx_start_queue(txq);
3924         return 0;
3925 }
3926
3927 int qeth_do_send_packet(struct qeth_card *card, struct qeth_qdio_out_q *queue,
3928                         struct sk_buff *skb, struct qeth_hdr *hdr,
3929                         unsigned int offset, unsigned int hd_len,
3930                         int elements_needed)
3931 {
3932         struct qeth_qdio_out_buffer *buffer;
3933         struct netdev_queue *txq;
3934         bool stopped = false;
3935         int start_index;
3936         int flush_count = 0;
3937         int do_pack = 0;
3938         int tmp;
3939         int rc = 0;
3940
3941         /* spin until we get the queue ... */
3942         while (atomic_cmpxchg(&queue->state, QETH_OUT_Q_UNLOCKED,
3943                               QETH_OUT_Q_LOCKED) != QETH_OUT_Q_UNLOCKED);
3944         start_index = queue->next_buf_to_fill;
3945         buffer = queue->bufs[queue->next_buf_to_fill];
3946
3947         /* Just a sanity check, the wake/stop logic should ensure that we always
3948          * get a free buffer.
3949          */
3950         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY) {
3951                 atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
3952                 return -EBUSY;
3953         }
3954
3955         txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
3956
3957         /* check if we need to switch packing state of this queue */
3958         qeth_switch_to_packing_if_needed(queue);
3959         if (queue->do_pack) {
3960                 do_pack = 1;
3961                 /* does packet fit in current buffer? */
3962                 if (buffer->next_element_to_fill + elements_needed >
3963                     queue->max_elements) {
3964                         /* ... no -> set state PRIMED */
3965                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3966                         flush_count++;
3967                         queue->next_buf_to_fill =
3968                                 (queue->next_buf_to_fill + 1) %
3969                                 QDIO_MAX_BUFFERS_PER_Q;
3970                         buffer = queue->bufs[queue->next_buf_to_fill];
3971
3972                         /* We stepped forward, so sanity-check again: */
3973                         if (atomic_read(&buffer->state) !=
3974                             QETH_QDIO_BUF_EMPTY) {
3975                                 qeth_flush_buffers(queue, start_index,
3976                                                            flush_count);
3977                                 atomic_set(&queue->state,
3978                                                 QETH_OUT_Q_UNLOCKED);
3979                                 rc = -EBUSY;
3980                                 goto out;
3981                         }
3982                 }
3983         }
3984
3985         if (buffer->next_element_to_fill == 0 &&
3986             atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
3987                 /* If a TX completion happens right _here_ and misses to wake
3988                  * the txq, then our re-check below will catch the race.
3989                  */
3990                 QETH_TXQ_STAT_INC(queue, stopped);
3991                 netif_tx_stop_queue(txq);
3992                 stopped = true;
3993         }
3994
3995         flush_count += qeth_fill_buffer(queue, buffer, skb, hdr, offset, hd_len,
3996                                         stopped);
3997         if (flush_count)
3998                 qeth_flush_buffers(queue, start_index, flush_count);
3999         else if (!atomic_read(&queue->set_pci_flags_count))
4000                 atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH);
4001         /*
4002          * queue->state will go from LOCKED -> UNLOCKED or from
4003          * LOCKED_FLUSH -> LOCKED if output_handler wanted to 'notify' us
4004          * (switch packing state or flush buffer to get another pci flag out).
4005          * In that case we will enter this loop
4006          */
4007         while (atomic_dec_return(&queue->state)) {
4008                 start_index = queue->next_buf_to_fill;
4009                 /* check if we can go back to non-packing state */
4010                 tmp = qeth_switch_to_nonpacking_if_needed(queue);
4011                 /*
4012                  * check if we need to flush a packing buffer to get a pci
4013                  * flag out on the queue
4014                  */
4015                 if (!tmp && !atomic_read(&queue->set_pci_flags_count))
4016                         tmp = qeth_prep_flush_pack_buffer(queue);
4017                 if (tmp) {
4018                         qeth_flush_buffers(queue, start_index, tmp);
4019                         flush_count += tmp;
4020                 }
4021         }
4022 out:
4023         /* at this point the queue is UNLOCKED again */
4024         if (do_pack)
4025                 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_count);
4026
4027         if (stopped && !qeth_out_queue_is_full(queue))
4028                 netif_tx_start_queue(txq);
4029         return rc;
4030 }
4031 EXPORT_SYMBOL_GPL(qeth_do_send_packet);
4032
4033 static void qeth_fill_tso_ext(struct qeth_hdr_tso *hdr,
4034                               unsigned int payload_len, struct sk_buff *skb,
4035                               unsigned int proto_len)
4036 {
4037         struct qeth_hdr_ext_tso *ext = &hdr->ext;
4038
4039         ext->hdr_tot_len = sizeof(*ext);
4040         ext->imb_hdr_no = 1;
4041         ext->hdr_type = 1;
4042         ext->hdr_version = 1;
4043         ext->hdr_len = 28;
4044         ext->payload_len = payload_len;
4045         ext->mss = skb_shinfo(skb)->gso_size;
4046         ext->dg_hdr_len = proto_len;
4047 }
4048
4049 int qeth_xmit(struct qeth_card *card, struct sk_buff *skb,
4050               struct qeth_qdio_out_q *queue, int ipv, int cast_type,
4051               void (*fill_header)(struct qeth_qdio_out_q *queue,
4052                                   struct qeth_hdr *hdr, struct sk_buff *skb,
4053                                   int ipv, int cast_type,
4054                                   unsigned int data_len))
4055 {
4056         unsigned int proto_len, hw_hdr_len;
4057         unsigned int frame_len = skb->len;
4058         bool is_tso = skb_is_gso(skb);
4059         unsigned int data_offset = 0;
4060         struct qeth_hdr *hdr = NULL;
4061         unsigned int hd_len = 0;
4062         unsigned int elements;
4063         int push_len, rc;
4064         bool is_sg;
4065
4066         if (is_tso) {
4067                 hw_hdr_len = sizeof(struct qeth_hdr_tso);
4068                 proto_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
4069         } else {
4070                 hw_hdr_len = sizeof(struct qeth_hdr);
4071                 proto_len = (IS_IQD(card) && IS_LAYER2(card)) ? ETH_HLEN : 0;
4072         }
4073
4074         rc = skb_cow_head(skb, hw_hdr_len);
4075         if (rc)
4076                 return rc;
4077
4078         push_len = qeth_add_hw_header(queue, skb, &hdr, hw_hdr_len, proto_len,
4079                                       &elements);
4080         if (push_len < 0)
4081                 return push_len;
4082         if (is_tso || !push_len) {
4083                 /* HW header needs its own buffer element. */
4084                 hd_len = hw_hdr_len + proto_len;
4085                 data_offset = push_len + proto_len;
4086         }
4087         memset(hdr, 0, hw_hdr_len);
4088         fill_header(queue, hdr, skb, ipv, cast_type, frame_len);
4089         if (is_tso)
4090                 qeth_fill_tso_ext((struct qeth_hdr_tso *) hdr,
4091                                   frame_len - proto_len, skb, proto_len);
4092
4093         is_sg = skb_is_nonlinear(skb);
4094         if (IS_IQD(card)) {
4095                 rc = qeth_do_send_packet_fast(queue, skb, hdr, data_offset,
4096                                               hd_len);
4097         } else {
4098                 /* TODO: drop skb_orphan() once TX completion is fast enough */
4099                 skb_orphan(skb);
4100                 rc = qeth_do_send_packet(card, queue, skb, hdr, data_offset,
4101                                          hd_len, elements);
4102         }
4103
4104         if (!rc) {
4105                 QETH_TXQ_STAT_ADD(queue, buf_elements, elements);
4106                 if (is_sg)
4107                         QETH_TXQ_STAT_INC(queue, skbs_sg);
4108                 if (is_tso) {
4109                         QETH_TXQ_STAT_INC(queue, skbs_tso);
4110                         QETH_TXQ_STAT_ADD(queue, tso_bytes, frame_len);
4111                 }
4112         } else {
4113                 if (!push_len)
4114                         kmem_cache_free(qeth_core_header_cache, hdr);
4115         }
4116         return rc;
4117 }
4118 EXPORT_SYMBOL_GPL(qeth_xmit);
4119
4120 static int qeth_setadp_promisc_mode_cb(struct qeth_card *card,
4121                 struct qeth_reply *reply, unsigned long data)
4122 {
4123         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4124         struct qeth_ipacmd_setadpparms *setparms;
4125
4126         QETH_CARD_TEXT(card, 4, "prmadpcb");
4127
4128         setparms = &(cmd->data.setadapterparms);
4129         if (qeth_setadpparms_inspect_rc(cmd)) {
4130                 QETH_CARD_TEXT_(card, 4, "prmrc%x", cmd->hdr.return_code);
4131                 setparms->data.mode = SET_PROMISC_MODE_OFF;
4132         }
4133         card->info.promisc_mode = setparms->data.mode;
4134         return (cmd->hdr.return_code) ? -EIO : 0;
4135 }
4136
4137 void qeth_setadp_promisc_mode(struct qeth_card *card)
4138 {
4139         enum qeth_ipa_promisc_modes mode;
4140         struct net_device *dev = card->dev;
4141         struct qeth_cmd_buffer *iob;
4142         struct qeth_ipa_cmd *cmd;
4143
4144         QETH_CARD_TEXT(card, 4, "setprom");
4145
4146         if (((dev->flags & IFF_PROMISC) &&
4147              (card->info.promisc_mode == SET_PROMISC_MODE_ON)) ||
4148             (!(dev->flags & IFF_PROMISC) &&
4149              (card->info.promisc_mode == SET_PROMISC_MODE_OFF)))
4150                 return;
4151         mode = SET_PROMISC_MODE_OFF;
4152         if (dev->flags & IFF_PROMISC)
4153                 mode = SET_PROMISC_MODE_ON;
4154         QETH_CARD_TEXT_(card, 4, "mode:%x", mode);
4155
4156         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE,
4157                         sizeof(struct qeth_ipacmd_setadpparms_hdr) + 8);
4158         if (!iob)
4159                 return;
4160         cmd = __ipa_cmd(iob);
4161         cmd->data.setadapterparms.data.mode = mode;
4162         qeth_send_ipa_cmd(card, iob, qeth_setadp_promisc_mode_cb, NULL);
4163 }
4164 EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode);
4165
4166 static int qeth_setadpparms_change_macaddr_cb(struct qeth_card *card,
4167                 struct qeth_reply *reply, unsigned long data)
4168 {
4169         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4170         struct qeth_ipacmd_setadpparms *adp_cmd;
4171
4172         QETH_CARD_TEXT(card, 4, "chgmaccb");
4173         if (qeth_setadpparms_inspect_rc(cmd))
4174                 return -EIO;
4175
4176         adp_cmd = &cmd->data.setadapterparms;
4177         if (!is_valid_ether_addr(adp_cmd->data.change_addr.addr))
4178                 return -EADDRNOTAVAIL;
4179
4180         if (IS_LAYER2(card) && IS_OSD(card) && !IS_VM_NIC(card) &&
4181             !(adp_cmd->hdr.flags & QETH_SETADP_FLAGS_VIRTUAL_MAC))
4182                 return -EADDRNOTAVAIL;
4183
4184         ether_addr_copy(card->dev->dev_addr, adp_cmd->data.change_addr.addr);
4185         return 0;
4186 }
4187
4188 int qeth_setadpparms_change_macaddr(struct qeth_card *card)
4189 {
4190         int rc;
4191         struct qeth_cmd_buffer *iob;
4192         struct qeth_ipa_cmd *cmd;
4193
4194         QETH_CARD_TEXT(card, 4, "chgmac");
4195
4196         iob = qeth_get_adapter_cmd(card, IPA_SETADP_ALTER_MAC_ADDRESS,
4197                                    sizeof(struct qeth_ipacmd_setadpparms_hdr) +
4198                                    sizeof(struct qeth_change_addr));
4199         if (!iob)
4200                 return -ENOMEM;
4201         cmd = __ipa_cmd(iob);
4202         cmd->data.setadapterparms.data.change_addr.cmd = CHANGE_ADDR_READ_MAC;
4203         cmd->data.setadapterparms.data.change_addr.addr_size = ETH_ALEN;
4204         ether_addr_copy(cmd->data.setadapterparms.data.change_addr.addr,
4205                         card->dev->dev_addr);
4206         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_change_macaddr_cb,
4207                                NULL);
4208         return rc;
4209 }
4210 EXPORT_SYMBOL_GPL(qeth_setadpparms_change_macaddr);
4211
4212 static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card,
4213                 struct qeth_reply *reply, unsigned long data)
4214 {
4215         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4216         struct qeth_set_access_ctrl *access_ctrl_req;
4217         int fallback = *(int *)reply->param;
4218
4219         QETH_CARD_TEXT(card, 4, "setaccb");
4220         if (cmd->hdr.return_code)
4221                 return -EIO;
4222         qeth_setadpparms_inspect_rc(cmd);
4223
4224         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4225         QETH_DBF_TEXT_(SETUP, 2, "setaccb");
4226         QETH_DBF_TEXT_(SETUP, 2, "%s", card->gdev->dev.kobj.name);
4227         QETH_DBF_TEXT_(SETUP, 2, "rc=%d",
4228                 cmd->data.setadapterparms.hdr.return_code);
4229         if (cmd->data.setadapterparms.hdr.return_code !=
4230                                                 SET_ACCESS_CTRL_RC_SUCCESS)
4231                 QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%#x) on device %x: %#x\n",
4232                                  access_ctrl_req->subcmd_code, CARD_DEVID(card),
4233                                  cmd->data.setadapterparms.hdr.return_code);
4234         switch (cmd->data.setadapterparms.hdr.return_code) {
4235         case SET_ACCESS_CTRL_RC_SUCCESS:
4236                 if (card->options.isolation == ISOLATION_MODE_NONE) {
4237                         dev_info(&card->gdev->dev,
4238                             "QDIO data connection isolation is deactivated\n");
4239                 } else {
4240                         dev_info(&card->gdev->dev,
4241                             "QDIO data connection isolation is activated\n");
4242                 }
4243                 break;
4244         case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
4245                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already deactivated\n",
4246                                  CARD_DEVID(card));
4247                 if (fallback)
4248                         card->options.isolation = card->options.prev_isolation;
4249                 break;
4250         case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
4251                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already activated\n",
4252                                  CARD_DEVID(card));
4253                 if (fallback)
4254                         card->options.isolation = card->options.prev_isolation;
4255                 break;
4256         case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
4257                 dev_err(&card->gdev->dev, "Adapter does not "
4258                         "support QDIO data connection isolation\n");
4259                 break;
4260         case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
4261                 dev_err(&card->gdev->dev,
4262                         "Adapter is dedicated. "
4263                         "QDIO data connection isolation not supported\n");
4264                 if (fallback)
4265                         card->options.isolation = card->options.prev_isolation;
4266                 break;
4267         case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
4268                 dev_err(&card->gdev->dev,
4269                         "TSO does not permit QDIO data connection isolation\n");
4270                 if (fallback)
4271                         card->options.isolation = card->options.prev_isolation;
4272                 break;
4273         case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED:
4274                 dev_err(&card->gdev->dev, "The adjacent switch port does not "
4275                         "support reflective relay mode\n");
4276                 if (fallback)
4277                         card->options.isolation = card->options.prev_isolation;
4278                 break;
4279         case SET_ACCESS_CTRL_RC_REFLREL_FAILED:
4280                 dev_err(&card->gdev->dev, "The reflective relay mode cannot be "
4281                                         "enabled at the adjacent switch port");
4282                 if (fallback)
4283                         card->options.isolation = card->options.prev_isolation;
4284                 break;
4285         case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED:
4286                 dev_warn(&card->gdev->dev, "Turning off reflective relay mode "
4287                                         "at the adjacent switch failed\n");
4288                 break;
4289         default:
4290                 /* this should never happen */
4291                 if (fallback)
4292                         card->options.isolation = card->options.prev_isolation;
4293                 break;
4294         }
4295         return (cmd->hdr.return_code) ? -EIO : 0;
4296 }
4297
4298 static int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
4299                 enum qeth_ipa_isolation_modes isolation, int fallback)
4300 {
4301         int rc;
4302         struct qeth_cmd_buffer *iob;
4303         struct qeth_ipa_cmd *cmd;
4304         struct qeth_set_access_ctrl *access_ctrl_req;
4305
4306         QETH_CARD_TEXT(card, 4, "setacctl");
4307
4308         QETH_DBF_TEXT_(SETUP, 2, "setacctl");
4309         QETH_DBF_TEXT_(SETUP, 2, "%s", card->gdev->dev.kobj.name);
4310
4311         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL,
4312                                    sizeof(struct qeth_ipacmd_setadpparms_hdr) +
4313                                    sizeof(struct qeth_set_access_ctrl));
4314         if (!iob)
4315                 return -ENOMEM;
4316         cmd = __ipa_cmd(iob);
4317         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4318         access_ctrl_req->subcmd_code = isolation;
4319
4320         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb,
4321                                &fallback);
4322         QETH_DBF_TEXT_(SETUP, 2, "rc=%d", rc);
4323         return rc;
4324 }
4325
4326 int qeth_set_access_ctrl_online(struct qeth_card *card, int fallback)
4327 {
4328         int rc = 0;
4329
4330         QETH_CARD_TEXT(card, 4, "setactlo");
4331
4332         if ((IS_OSD(card) || IS_OSX(card)) &&
4333             qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) {
4334                 rc = qeth_setadpparms_set_access_ctrl(card,
4335                         card->options.isolation, fallback);
4336                 if (rc) {
4337                         QETH_DBF_MESSAGE(3, "IPA(SET_ACCESS_CTRL(%d) on device %x: sent failed\n",
4338                                          rc, CARD_DEVID(card));
4339                         rc = -EOPNOTSUPP;
4340                 }
4341         } else if (card->options.isolation != ISOLATION_MODE_NONE) {
4342                 card->options.isolation = ISOLATION_MODE_NONE;
4343
4344                 dev_err(&card->gdev->dev, "Adapter does not "
4345                         "support QDIO data connection isolation\n");
4346                 rc = -EOPNOTSUPP;
4347         }
4348         return rc;
4349 }
4350 EXPORT_SYMBOL_GPL(qeth_set_access_ctrl_online);
4351
4352 void qeth_tx_timeout(struct net_device *dev)
4353 {
4354         struct qeth_card *card;
4355
4356         card = dev->ml_priv;
4357         QETH_CARD_TEXT(card, 4, "txtimeo");
4358         qeth_schedule_recovery(card);
4359 }
4360 EXPORT_SYMBOL_GPL(qeth_tx_timeout);
4361
4362 static int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum)
4363 {
4364         struct qeth_card *card = dev->ml_priv;
4365         int rc = 0;
4366
4367         switch (regnum) {
4368         case MII_BMCR: /* Basic mode control register */
4369                 rc = BMCR_FULLDPLX;
4370                 if ((card->info.link_type != QETH_LINK_TYPE_GBIT_ETH) &&
4371                     (card->info.link_type != QETH_LINK_TYPE_OSN) &&
4372                     (card->info.link_type != QETH_LINK_TYPE_10GBIT_ETH) &&
4373                     (card->info.link_type != QETH_LINK_TYPE_25GBIT_ETH))
4374                         rc |= BMCR_SPEED100;
4375                 break;
4376         case MII_BMSR: /* Basic mode status register */
4377                 rc = BMSR_ERCAP | BMSR_ANEGCOMPLETE | BMSR_LSTATUS |
4378                      BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | BMSR_100FULL |
4379                      BMSR_100BASE4;
4380                 break;
4381         case MII_PHYSID1: /* PHYS ID 1 */
4382                 rc = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 8) |
4383                      dev->dev_addr[2];
4384                 rc = (rc >> 5) & 0xFFFF;
4385                 break;
4386         case MII_PHYSID2: /* PHYS ID 2 */
4387                 rc = (dev->dev_addr[2] << 10) & 0xFFFF;
4388                 break;
4389         case MII_ADVERTISE: /* Advertisement control reg */
4390                 rc = ADVERTISE_ALL;
4391                 break;
4392         case MII_LPA: /* Link partner ability reg */
4393                 rc = LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL |
4394                      LPA_100BASE4 | LPA_LPACK;
4395                 break;
4396         case MII_EXPANSION: /* Expansion register */
4397                 break;
4398         case MII_DCOUNTER: /* disconnect counter */
4399                 break;
4400         case MII_FCSCOUNTER: /* false carrier counter */
4401                 break;
4402         case MII_NWAYTEST: /* N-way auto-neg test register */
4403                 break;
4404         case MII_RERRCOUNTER: /* rx error counter */
4405                 rc = card->stats.rx_errors;
4406                 break;
4407         case MII_SREVISION: /* silicon revision */
4408                 break;
4409         case MII_RESV1: /* reserved 1 */
4410                 break;
4411         case MII_LBRERROR: /* loopback, rx, bypass error */
4412                 break;
4413         case MII_PHYADDR: /* physical address */
4414                 break;
4415         case MII_RESV2: /* reserved 2 */
4416                 break;
4417         case MII_TPISTATUS: /* TPI status for 10mbps */
4418                 break;
4419         case MII_NCONFIG: /* network interface config */
4420                 break;
4421         default:
4422                 break;
4423         }
4424         return rc;
4425 }
4426
4427 static int qeth_snmp_command_cb(struct qeth_card *card,
4428                 struct qeth_reply *reply, unsigned long sdata)
4429 {
4430         struct qeth_ipa_cmd *cmd;
4431         struct qeth_arp_query_info *qinfo;
4432         unsigned char *data;
4433         void *snmp_data;
4434         __u16 data_len;
4435
4436         QETH_CARD_TEXT(card, 3, "snpcmdcb");
4437
4438         cmd = (struct qeth_ipa_cmd *) sdata;
4439         data = (unsigned char *)((char *)cmd - reply->offset);
4440         qinfo = (struct qeth_arp_query_info *) reply->param;
4441
4442         if (cmd->hdr.return_code) {
4443                 QETH_CARD_TEXT_(card, 4, "scer1%x", cmd->hdr.return_code);
4444                 return -EIO;
4445         }
4446         if (cmd->data.setadapterparms.hdr.return_code) {
4447                 cmd->hdr.return_code =
4448                         cmd->data.setadapterparms.hdr.return_code;
4449                 QETH_CARD_TEXT_(card, 4, "scer2%x", cmd->hdr.return_code);
4450                 return -EIO;
4451         }
4452         data_len = *((__u16 *)QETH_IPA_PDU_LEN_PDU1(data));
4453         if (cmd->data.setadapterparms.hdr.seq_no == 1) {
4454                 snmp_data = &cmd->data.setadapterparms.data.snmp;
4455                 data_len -= offsetof(struct qeth_ipa_cmd,
4456                                      data.setadapterparms.data.snmp);
4457         } else {
4458                 snmp_data = &cmd->data.setadapterparms.data.snmp.request;
4459                 data_len -= offsetof(struct qeth_ipa_cmd,
4460                                      data.setadapterparms.data.snmp.request);
4461         }
4462
4463         /* check if there is enough room in userspace */
4464         if ((qinfo->udata_len - qinfo->udata_offset) < data_len) {
4465                 QETH_CARD_TEXT_(card, 4, "scer3%i", -ENOSPC);
4466                 return -ENOSPC;
4467         }
4468         QETH_CARD_TEXT_(card, 4, "snore%i",
4469                        cmd->data.setadapterparms.hdr.used_total);
4470         QETH_CARD_TEXT_(card, 4, "sseqn%i",
4471                 cmd->data.setadapterparms.hdr.seq_no);
4472         /*copy entries to user buffer*/
4473         memcpy(qinfo->udata + qinfo->udata_offset, snmp_data, data_len);
4474         qinfo->udata_offset += data_len;
4475
4476         /* check if all replies received ... */
4477                 QETH_CARD_TEXT_(card, 4, "srtot%i",
4478                                cmd->data.setadapterparms.hdr.used_total);
4479                 QETH_CARD_TEXT_(card, 4, "srseq%i",
4480                                cmd->data.setadapterparms.hdr.seq_no);
4481         if (cmd->data.setadapterparms.hdr.seq_no <
4482             cmd->data.setadapterparms.hdr.used_total)
4483                 return 1;
4484         return 0;
4485 }
4486
4487 static int qeth_snmp_command(struct qeth_card *card, char __user *udata)
4488 {
4489         struct qeth_cmd_buffer *iob;
4490         struct qeth_ipa_cmd *cmd;
4491         struct qeth_snmp_ureq *ureq;
4492         unsigned int req_len;
4493         struct qeth_arp_query_info qinfo = {0, };
4494         int rc = 0;
4495
4496         QETH_CARD_TEXT(card, 3, "snmpcmd");
4497
4498         if (IS_VM_NIC(card))
4499                 return -EOPNOTSUPP;
4500
4501         if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) &&
4502             IS_LAYER3(card))
4503                 return -EOPNOTSUPP;
4504
4505         /* skip 4 bytes (data_len struct member) to get req_len */
4506         if (copy_from_user(&req_len, udata + sizeof(int), sizeof(int)))
4507                 return -EFAULT;
4508         if (req_len > (QETH_BUFSIZE - IPA_PDU_HEADER_SIZE -
4509                        sizeof(struct qeth_ipacmd_hdr) -
4510                        sizeof(struct qeth_ipacmd_setadpparms_hdr)))
4511                 return -EINVAL;
4512         ureq = memdup_user(udata, req_len + sizeof(struct qeth_snmp_ureq_hdr));
4513         if (IS_ERR(ureq)) {
4514                 QETH_CARD_TEXT(card, 2, "snmpnome");
4515                 return PTR_ERR(ureq);
4516         }
4517         qinfo.udata_len = ureq->hdr.data_len;
4518         qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
4519         if (!qinfo.udata) {
4520                 kfree(ureq);
4521                 return -ENOMEM;
4522         }
4523         qinfo.udata_offset = sizeof(struct qeth_snmp_ureq_hdr);
4524
4525         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL,
4526                                    QETH_SNMP_SETADP_CMDLENGTH + req_len);
4527         if (!iob) {
4528                 rc = -ENOMEM;
4529                 goto out;
4530         }
4531
4532         /* for large requests, fix-up the length fields: */
4533         qeth_prepare_ipa_cmd(card, iob, QETH_SETADP_BASE_LEN + req_len);
4534
4535         cmd = __ipa_cmd(iob);
4536         memcpy(&cmd->data.setadapterparms.data.snmp, &ureq->cmd, req_len);
4537         rc = qeth_send_ipa_cmd(card, iob, qeth_snmp_command_cb, &qinfo);
4538         if (rc)
4539                 QETH_DBF_MESSAGE(2, "SNMP command failed on device %x: (%#x)\n",
4540                                  CARD_DEVID(card), rc);
4541         else {
4542                 if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
4543                         rc = -EFAULT;
4544         }
4545 out:
4546         kfree(ureq);
4547         kfree(qinfo.udata);
4548         return rc;
4549 }
4550
4551 static int qeth_setadpparms_query_oat_cb(struct qeth_card *card,
4552                 struct qeth_reply *reply, unsigned long data)
4553 {
4554         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4555         struct qeth_qoat_priv *priv;
4556         char *resdata;
4557         int resdatalen;
4558
4559         QETH_CARD_TEXT(card, 3, "qoatcb");
4560         if (qeth_setadpparms_inspect_rc(cmd))
4561                 return -EIO;
4562
4563         priv = (struct qeth_qoat_priv *)reply->param;
4564         resdatalen = cmd->data.setadapterparms.hdr.cmdlength;
4565         resdata = (char *)data + 28;
4566
4567         if (resdatalen > (priv->buffer_len - priv->response_len))
4568                 return -ENOSPC;
4569
4570         memcpy((priv->buffer + priv->response_len), resdata,
4571                 resdatalen);
4572         priv->response_len += resdatalen;
4573
4574         if (cmd->data.setadapterparms.hdr.seq_no <
4575             cmd->data.setadapterparms.hdr.used_total)
4576                 return 1;
4577         return 0;
4578 }
4579
4580 static int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
4581 {
4582         int rc = 0;
4583         struct qeth_cmd_buffer *iob;
4584         struct qeth_ipa_cmd *cmd;
4585         struct qeth_query_oat *oat_req;
4586         struct qeth_query_oat_data oat_data;
4587         struct qeth_qoat_priv priv;
4588         void __user *tmp;
4589
4590         QETH_CARD_TEXT(card, 3, "qoatcmd");
4591
4592         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT)) {
4593                 rc = -EOPNOTSUPP;
4594                 goto out;
4595         }
4596
4597         if (copy_from_user(&oat_data, udata,
4598             sizeof(struct qeth_query_oat_data))) {
4599                         rc = -EFAULT;
4600                         goto out;
4601         }
4602
4603         priv.buffer_len = oat_data.buffer_len;
4604         priv.response_len = 0;
4605         priv.buffer = vzalloc(oat_data.buffer_len);
4606         if (!priv.buffer) {
4607                 rc = -ENOMEM;
4608                 goto out;
4609         }
4610
4611         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4612                                    sizeof(struct qeth_ipacmd_setadpparms_hdr) +
4613                                    sizeof(struct qeth_query_oat));
4614         if (!iob) {
4615                 rc = -ENOMEM;
4616                 goto out_free;
4617         }
4618         cmd = __ipa_cmd(iob);
4619         oat_req = &cmd->data.setadapterparms.data.query_oat;
4620         oat_req->subcmd_code = oat_data.command;
4621
4622         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb,
4623                                &priv);
4624         if (!rc) {
4625                 if (is_compat_task())
4626                         tmp = compat_ptr(oat_data.ptr);
4627                 else
4628                         tmp = (void __user *)(unsigned long)oat_data.ptr;
4629
4630                 if (copy_to_user(tmp, priv.buffer,
4631                     priv.response_len)) {
4632                         rc = -EFAULT;
4633                         goto out_free;
4634                 }
4635
4636                 oat_data.response_len = priv.response_len;
4637
4638                 if (copy_to_user(udata, &oat_data,
4639                     sizeof(struct qeth_query_oat_data)))
4640                         rc = -EFAULT;
4641         }
4642
4643 out_free:
4644         vfree(priv.buffer);
4645 out:
4646         return rc;
4647 }
4648
4649 static int qeth_query_card_info_cb(struct qeth_card *card,
4650                                    struct qeth_reply *reply, unsigned long data)
4651 {
4652         struct carrier_info *carrier_info = (struct carrier_info *)reply->param;
4653         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4654         struct qeth_query_card_info *card_info;
4655
4656         QETH_CARD_TEXT(card, 2, "qcrdincb");
4657         if (qeth_setadpparms_inspect_rc(cmd))
4658                 return -EIO;
4659
4660         card_info = &cmd->data.setadapterparms.data.card_info;
4661         carrier_info->card_type = card_info->card_type;
4662         carrier_info->port_mode = card_info->port_mode;
4663         carrier_info->port_speed = card_info->port_speed;
4664         return 0;
4665 }
4666
4667 int qeth_query_card_info(struct qeth_card *card,
4668                          struct carrier_info *carrier_info)
4669 {
4670         struct qeth_cmd_buffer *iob;
4671
4672         QETH_CARD_TEXT(card, 2, "qcrdinfo");
4673         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_CARD_INFO))
4674                 return -EOPNOTSUPP;
4675         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_CARD_INFO,
4676                 sizeof(struct qeth_ipacmd_setadpparms_hdr));
4677         if (!iob)
4678                 return -ENOMEM;
4679         return qeth_send_ipa_cmd(card, iob, qeth_query_card_info_cb,
4680                                         (void *)carrier_info);
4681 }
4682
4683 /**
4684  * qeth_vm_request_mac() - Request a hypervisor-managed MAC address
4685  * @card: pointer to a qeth_card
4686  *
4687  * Returns
4688  *      0, if a MAC address has been set for the card's netdevice
4689  *      a return code, for various error conditions
4690  */
4691 int qeth_vm_request_mac(struct qeth_card *card)
4692 {
4693         struct diag26c_mac_resp *response;
4694         struct diag26c_mac_req *request;
4695         struct ccw_dev_id id;
4696         int rc;
4697
4698         QETH_DBF_TEXT(SETUP, 2, "vmreqmac");
4699
4700         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
4701         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
4702         if (!request || !response) {
4703                 rc = -ENOMEM;
4704                 goto out;
4705         }
4706
4707         ccw_device_get_id(CARD_DDEV(card), &id);
4708         request->resp_buf_len = sizeof(*response);
4709         request->resp_version = DIAG26C_VERSION2;
4710         request->op_code = DIAG26C_GET_MAC;
4711         request->devno = id.devno;
4712
4713         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4714         rc = diag26c(request, response, DIAG26C_MAC_SERVICES);
4715         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4716         if (rc)
4717                 goto out;
4718         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
4719
4720         if (request->resp_buf_len < sizeof(*response) ||
4721             response->version != request->resp_version) {
4722                 rc = -EIO;
4723                 QETH_DBF_TEXT(SETUP, 2, "badresp");
4724                 QETH_DBF_HEX(SETUP, 2, &request->resp_buf_len,
4725                              sizeof(request->resp_buf_len));
4726         } else if (!is_valid_ether_addr(response->mac)) {
4727                 rc = -EINVAL;
4728                 QETH_DBF_TEXT(SETUP, 2, "badmac");
4729                 QETH_DBF_HEX(SETUP, 2, response->mac, ETH_ALEN);
4730         } else {
4731                 ether_addr_copy(card->dev->dev_addr, response->mac);
4732         }
4733
4734 out:
4735         kfree(response);
4736         kfree(request);
4737         return rc;
4738 }
4739 EXPORT_SYMBOL_GPL(qeth_vm_request_mac);
4740
4741 static void qeth_determine_capabilities(struct qeth_card *card)
4742 {
4743         int rc;
4744         int length;
4745         char *prcd;
4746         struct ccw_device *ddev;
4747         int ddev_offline = 0;
4748
4749         QETH_DBF_TEXT(SETUP, 2, "detcapab");
4750         ddev = CARD_DDEV(card);
4751         if (!ddev->online) {
4752                 ddev_offline = 1;
4753                 rc = ccw_device_set_online(ddev);
4754                 if (rc) {
4755                         QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
4756                         goto out;
4757                 }
4758         }
4759
4760         rc = qeth_read_conf_data(card, (void **) &prcd, &length);
4761         if (rc) {
4762                 QETH_DBF_MESSAGE(2, "qeth_read_conf_data on device %x returned %i\n",
4763                                  CARD_DEVID(card), rc);
4764                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
4765                 goto out_offline;
4766         }
4767         qeth_configure_unitaddr(card, prcd);
4768         if (ddev_offline)
4769                 qeth_configure_blkt_default(card, prcd);
4770         kfree(prcd);
4771
4772         rc = qdio_get_ssqd_desc(ddev, &card->ssqd);
4773         if (rc)
4774                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
4775
4776         QETH_DBF_TEXT_(SETUP, 2, "qfmt%d", card->ssqd.qfmt);
4777         QETH_DBF_TEXT_(SETUP, 2, "ac1:%02x", card->ssqd.qdioac1);
4778         QETH_DBF_TEXT_(SETUP, 2, "ac2:%04x", card->ssqd.qdioac2);
4779         QETH_DBF_TEXT_(SETUP, 2, "ac3:%04x", card->ssqd.qdioac3);
4780         QETH_DBF_TEXT_(SETUP, 2, "icnt%d", card->ssqd.icnt);
4781         if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) ||
4782             ((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) ||
4783             ((card->ssqd.qdioac3 & CHSC_AC3_FORMAT2_CQ_AVAILABLE) == 0))) {
4784                 dev_info(&card->gdev->dev,
4785                         "Completion Queueing supported\n");
4786         } else {
4787                 card->options.cq = QETH_CQ_NOTAVAILABLE;
4788         }
4789
4790
4791 out_offline:
4792         if (ddev_offline == 1)
4793                 ccw_device_set_offline(ddev);
4794 out:
4795         return;
4796 }
4797
4798 static void qeth_qdio_establish_cq(struct qeth_card *card,
4799                                    struct qdio_buffer **in_sbal_ptrs,
4800                                    void (**queue_start_poll)
4801                                         (struct ccw_device *, int,
4802                                          unsigned long))
4803 {
4804         int i;
4805
4806         if (card->options.cq == QETH_CQ_ENABLED) {
4807                 int offset = QDIO_MAX_BUFFERS_PER_Q *
4808                              (card->qdio.no_in_queues - 1);
4809                 for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i) {
4810                         in_sbal_ptrs[offset + i] = (struct qdio_buffer *)
4811                                 virt_to_phys(card->qdio.c_q->bufs[i].buffer);
4812                 }
4813
4814                 queue_start_poll[card->qdio.no_in_queues - 1] = NULL;
4815         }
4816 }
4817
4818 static int qeth_qdio_establish(struct qeth_card *card)
4819 {
4820         struct qdio_initialize init_data;
4821         char *qib_param_field;
4822         struct qdio_buffer **in_sbal_ptrs;
4823         void (**queue_start_poll) (struct ccw_device *, int, unsigned long);
4824         struct qdio_buffer **out_sbal_ptrs;
4825         int i, j, k;
4826         int rc = 0;
4827
4828         QETH_DBF_TEXT(SETUP, 2, "qdioest");
4829
4830         qib_param_field = kzalloc(QDIO_MAX_BUFFERS_PER_Q,
4831                                   GFP_KERNEL);
4832         if (!qib_param_field) {
4833                 rc =  -ENOMEM;
4834                 goto out_free_nothing;
4835         }
4836
4837         qeth_create_qib_param_field(card, qib_param_field);
4838         qeth_create_qib_param_field_blkt(card, qib_param_field);
4839
4840         in_sbal_ptrs = kcalloc(card->qdio.no_in_queues * QDIO_MAX_BUFFERS_PER_Q,
4841                                sizeof(void *),
4842                                GFP_KERNEL);
4843         if (!in_sbal_ptrs) {
4844                 rc = -ENOMEM;
4845                 goto out_free_qib_param;
4846         }
4847         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i) {
4848                 in_sbal_ptrs[i] = (struct qdio_buffer *)
4849                         virt_to_phys(card->qdio.in_q->bufs[i].buffer);
4850         }
4851
4852         queue_start_poll = kcalloc(card->qdio.no_in_queues, sizeof(void *),
4853                                    GFP_KERNEL);
4854         if (!queue_start_poll) {
4855                 rc = -ENOMEM;
4856                 goto out_free_in_sbals;
4857         }
4858         for (i = 0; i < card->qdio.no_in_queues; ++i)
4859                 queue_start_poll[i] = qeth_qdio_start_poll;
4860
4861         qeth_qdio_establish_cq(card, in_sbal_ptrs, queue_start_poll);
4862
4863         out_sbal_ptrs =
4864                 kcalloc(card->qdio.no_out_queues * QDIO_MAX_BUFFERS_PER_Q,
4865                         sizeof(void *),
4866                         GFP_KERNEL);
4867         if (!out_sbal_ptrs) {
4868                 rc = -ENOMEM;
4869                 goto out_free_queue_start_poll;
4870         }
4871         for (i = 0, k = 0; i < card->qdio.no_out_queues; ++i)
4872                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j, ++k) {
4873                         out_sbal_ptrs[k] = (struct qdio_buffer *)virt_to_phys(
4874                                 card->qdio.out_qs[i]->bufs[j]->buffer);
4875                 }
4876
4877         memset(&init_data, 0, sizeof(struct qdio_initialize));
4878         init_data.cdev                   = CARD_DDEV(card);
4879         init_data.q_format               = IS_IQD(card) ? QDIO_IQDIO_QFMT :
4880                                                           QDIO_QETH_QFMT;
4881         init_data.qib_param_field_format = 0;
4882         init_data.qib_param_field        = qib_param_field;
4883         init_data.no_input_qs            = card->qdio.no_in_queues;
4884         init_data.no_output_qs           = card->qdio.no_out_queues;
4885         init_data.input_handler          = qeth_qdio_input_handler;
4886         init_data.output_handler         = qeth_qdio_output_handler;
4887         init_data.queue_start_poll_array = queue_start_poll;
4888         init_data.int_parm               = (unsigned long) card;
4889         init_data.input_sbal_addr_array  = in_sbal_ptrs;
4890         init_data.output_sbal_addr_array = out_sbal_ptrs;
4891         init_data.output_sbal_state_array = card->qdio.out_bufstates;
4892         init_data.scan_threshold         = IS_IQD(card) ? 1 : 32;
4893
4894         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED,
4895                 QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) {
4896                 rc = qdio_allocate(&init_data);
4897                 if (rc) {
4898                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
4899                         goto out;
4900                 }
4901                 rc = qdio_establish(&init_data);
4902                 if (rc) {
4903                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
4904                         qdio_free(CARD_DDEV(card));
4905                 }
4906         }
4907
4908         switch (card->options.cq) {
4909         case QETH_CQ_ENABLED:
4910                 dev_info(&card->gdev->dev, "Completion Queue support enabled");
4911                 break;
4912         case QETH_CQ_DISABLED:
4913                 dev_info(&card->gdev->dev, "Completion Queue support disabled");
4914                 break;
4915         default:
4916                 break;
4917         }
4918 out:
4919         kfree(out_sbal_ptrs);
4920 out_free_queue_start_poll:
4921         kfree(queue_start_poll);
4922 out_free_in_sbals:
4923         kfree(in_sbal_ptrs);
4924 out_free_qib_param:
4925         kfree(qib_param_field);
4926 out_free_nothing:
4927         return rc;
4928 }
4929
4930 static void qeth_core_free_card(struct qeth_card *card)
4931 {
4932         QETH_DBF_TEXT(SETUP, 2, "freecrd");
4933         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
4934         qeth_clean_channel(&card->read);
4935         qeth_clean_channel(&card->write);
4936         qeth_clean_channel(&card->data);
4937         destroy_workqueue(card->event_wq);
4938         qeth_free_qdio_queues(card);
4939         unregister_service_level(&card->qeth_service_level);
4940         dev_set_drvdata(&card->gdev->dev, NULL);
4941         kfree(card);
4942 }
4943
4944 void qeth_trace_features(struct qeth_card *card)
4945 {
4946         QETH_CARD_TEXT(card, 2, "features");
4947         QETH_CARD_HEX(card, 2, &card->options.ipa4, sizeof(card->options.ipa4));
4948         QETH_CARD_HEX(card, 2, &card->options.ipa6, sizeof(card->options.ipa6));
4949         QETH_CARD_HEX(card, 2, &card->options.adp, sizeof(card->options.adp));
4950         QETH_CARD_HEX(card, 2, &card->info.diagass_support,
4951                       sizeof(card->info.diagass_support));
4952 }
4953 EXPORT_SYMBOL_GPL(qeth_trace_features);
4954
4955 static struct ccw_device_id qeth_ids[] = {
4956         {CCW_DEVICE_DEVTYPE(0x1731, 0x01, 0x1732, 0x01),
4957                                         .driver_info = QETH_CARD_TYPE_OSD},
4958         {CCW_DEVICE_DEVTYPE(0x1731, 0x05, 0x1732, 0x05),
4959                                         .driver_info = QETH_CARD_TYPE_IQD},
4960         {CCW_DEVICE_DEVTYPE(0x1731, 0x06, 0x1732, 0x06),
4961                                         .driver_info = QETH_CARD_TYPE_OSN},
4962         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x03),
4963                                         .driver_info = QETH_CARD_TYPE_OSM},
4964         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x02),
4965                                         .driver_info = QETH_CARD_TYPE_OSX},
4966         {},
4967 };
4968 MODULE_DEVICE_TABLE(ccw, qeth_ids);
4969
4970 static struct ccw_driver qeth_ccw_driver = {
4971         .driver = {
4972                 .owner = THIS_MODULE,
4973                 .name = "qeth",
4974         },
4975         .ids = qeth_ids,
4976         .probe = ccwgroup_probe_ccwdev,
4977         .remove = ccwgroup_remove_ccwdev,
4978 };
4979
4980 int qeth_core_hardsetup_card(struct qeth_card *card, bool *carrier_ok)
4981 {
4982         int retries = 3;
4983         int rc;
4984
4985         QETH_DBF_TEXT(SETUP, 2, "hrdsetup");
4986         atomic_set(&card->force_alloc_skb, 0);
4987         rc = qeth_update_from_chp_desc(card);
4988         if (rc)
4989                 return rc;
4990 retry:
4991         if (retries < 3)
4992                 QETH_DBF_MESSAGE(2, "Retrying to do IDX activates on device %x.\n",
4993                                  CARD_DEVID(card));
4994         rc = qeth_qdio_clear_card(card, !IS_IQD(card));
4995         ccw_device_set_offline(CARD_DDEV(card));
4996         ccw_device_set_offline(CARD_WDEV(card));
4997         ccw_device_set_offline(CARD_RDEV(card));
4998         qdio_free(CARD_DDEV(card));
4999         rc = ccw_device_set_online(CARD_RDEV(card));
5000         if (rc)
5001                 goto retriable;
5002         rc = ccw_device_set_online(CARD_WDEV(card));
5003         if (rc)
5004                 goto retriable;
5005         rc = ccw_device_set_online(CARD_DDEV(card));
5006         if (rc)
5007                 goto retriable;
5008 retriable:
5009         if (rc == -ERESTARTSYS) {
5010                 QETH_DBF_TEXT(SETUP, 2, "break1");
5011                 return rc;
5012         } else if (rc) {
5013                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
5014                 if (--retries < 0)
5015                         goto out;
5016                 else
5017                         goto retry;
5018         }
5019         qeth_determine_capabilities(card);
5020         qeth_init_tokens(card);
5021         qeth_init_func_level(card);
5022
5023         rc = qeth_idx_activate_read_channel(card);
5024         if (rc == -EINTR) {
5025                 QETH_DBF_TEXT(SETUP, 2, "break2");
5026                 return rc;
5027         } else if (rc) {
5028                 QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
5029                 if (--retries < 0)
5030                         goto out;
5031                 else
5032                         goto retry;
5033         }
5034
5035         rc = qeth_idx_activate_write_channel(card);
5036         if (rc == -EINTR) {
5037                 QETH_DBF_TEXT(SETUP, 2, "break3");
5038                 return rc;
5039         } else if (rc) {
5040                 QETH_DBF_TEXT_(SETUP, 2, "4err%d", rc);
5041                 if (--retries < 0)
5042                         goto out;
5043                 else
5044                         goto retry;
5045         }
5046         card->read_or_write_problem = 0;
5047         rc = qeth_mpc_initialize(card);
5048         if (rc) {
5049                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
5050                 goto out;
5051         }
5052
5053         rc = qeth_send_startlan(card);
5054         if (rc) {
5055                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
5056                 if (rc == -ENETDOWN) {
5057                         dev_warn(&card->gdev->dev, "The LAN is offline\n");
5058                         *carrier_ok = false;
5059                 } else {
5060                         goto out;
5061                 }
5062         } else {
5063                 *carrier_ok = true;
5064         }
5065
5066         card->options.ipa4.supported_funcs = 0;
5067         card->options.ipa6.supported_funcs = 0;
5068         card->options.adp.supported_funcs = 0;
5069         card->options.sbp.supported_funcs = 0;
5070         card->info.diagass_support = 0;
5071         rc = qeth_query_ipassists(card, QETH_PROT_IPV4);
5072         if (rc == -ENOMEM)
5073                 goto out;
5074         if (qeth_is_supported(card, IPA_IPV6)) {
5075                 rc = qeth_query_ipassists(card, QETH_PROT_IPV6);
5076                 if (rc == -ENOMEM)
5077                         goto out;
5078         }
5079         if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
5080                 rc = qeth_query_setadapterparms(card);
5081                 if (rc < 0) {
5082                         QETH_DBF_TEXT_(SETUP, 2, "7err%d", rc);
5083                         goto out;
5084                 }
5085         }
5086         if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
5087                 rc = qeth_query_setdiagass(card);
5088                 if (rc < 0) {
5089                         QETH_DBF_TEXT_(SETUP, 2, "8err%d", rc);
5090                         goto out;
5091                 }
5092         }
5093         return 0;
5094 out:
5095         dev_warn(&card->gdev->dev, "The qeth device driver failed to recover "
5096                 "an error on the device\n");
5097         QETH_DBF_MESSAGE(2, "Initialization for device %x failed in hardsetup! rc=%d\n",
5098                          CARD_DEVID(card), rc);
5099         return rc;
5100 }
5101 EXPORT_SYMBOL_GPL(qeth_core_hardsetup_card);
5102
5103 static void qeth_create_skb_frag(struct qdio_buffer_element *element,
5104                                  struct sk_buff *skb, int offset, int data_len)
5105 {
5106         struct page *page = virt_to_page(element->addr);
5107         unsigned int next_frag;
5108
5109         /* first fill the linear space */
5110         if (!skb->len) {
5111                 unsigned int linear = min(data_len, skb_tailroom(skb));
5112
5113                 skb_put_data(skb, element->addr + offset, linear);
5114                 data_len -= linear;
5115                 if (!data_len)
5116                         return;
5117                 offset += linear;
5118                 /* fall through to add page frag for remaining data */
5119         }
5120
5121         next_frag = skb_shinfo(skb)->nr_frags;
5122         get_page(page);
5123         skb_add_rx_frag(skb, next_frag, page, offset, data_len, data_len);
5124 }
5125
5126 static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale)
5127 {
5128         return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY);
5129 }
5130
5131 struct sk_buff *qeth_core_get_next_skb(struct qeth_card *card,
5132                 struct qeth_qdio_buffer *qethbuffer,
5133                 struct qdio_buffer_element **__element, int *__offset,
5134                 struct qeth_hdr **hdr)
5135 {
5136         struct qdio_buffer_element *element = *__element;
5137         struct qdio_buffer *buffer = qethbuffer->buffer;
5138         int offset = *__offset;
5139         struct sk_buff *skb;
5140         int skb_len = 0;
5141         void *data_ptr;
5142         int data_len;
5143         int headroom = 0;
5144         int use_rx_sg = 0;
5145
5146         /* qeth_hdr must not cross element boundaries */
5147         while (element->length < offset + sizeof(struct qeth_hdr)) {
5148                 if (qeth_is_last_sbale(element))
5149                         return NULL;
5150                 element++;
5151                 offset = 0;
5152         }
5153         *hdr = element->addr + offset;
5154
5155         offset += sizeof(struct qeth_hdr);
5156         switch ((*hdr)->hdr.l2.id) {
5157         case QETH_HEADER_TYPE_LAYER2:
5158                 skb_len = (*hdr)->hdr.l2.pkt_length;
5159                 break;
5160         case QETH_HEADER_TYPE_LAYER3:
5161                 skb_len = (*hdr)->hdr.l3.length;
5162                 headroom = ETH_HLEN;
5163                 break;
5164         case QETH_HEADER_TYPE_OSN:
5165                 skb_len = (*hdr)->hdr.osn.pdu_length;
5166                 headroom = sizeof(struct qeth_hdr);
5167                 break;
5168         default:
5169                 break;
5170         }
5171
5172         if (!skb_len)
5173                 return NULL;
5174
5175         if (((skb_len >= card->options.rx_sg_cb) &&
5176              !IS_OSN(card) &&
5177              (!atomic_read(&card->force_alloc_skb))) ||
5178             (card->options.cq == QETH_CQ_ENABLED))
5179                 use_rx_sg = 1;
5180
5181         if (use_rx_sg && qethbuffer->rx_skb) {
5182                 /* QETH_CQ_ENABLED only: */
5183                 skb = qethbuffer->rx_skb;
5184                 qethbuffer->rx_skb = NULL;
5185         } else {
5186                 unsigned int linear = (use_rx_sg) ? QETH_RX_PULL_LEN : skb_len;
5187
5188                 skb = napi_alloc_skb(&card->napi, linear + headroom);
5189         }
5190         if (!skb)
5191                 goto no_mem;
5192         if (headroom)
5193                 skb_reserve(skb, headroom);
5194
5195         data_ptr = element->addr + offset;
5196         while (skb_len) {
5197                 data_len = min(skb_len, (int)(element->length - offset));
5198                 if (data_len) {
5199                         if (use_rx_sg)
5200                                 qeth_create_skb_frag(element, skb, offset,
5201                                                      data_len);
5202                         else
5203                                 skb_put_data(skb, data_ptr, data_len);
5204                 }
5205                 skb_len -= data_len;
5206                 if (skb_len) {
5207                         if (qeth_is_last_sbale(element)) {
5208                                 QETH_CARD_TEXT(card, 4, "unexeob");
5209                                 QETH_CARD_HEX(card, 2, buffer, sizeof(void *));
5210                                 dev_kfree_skb_any(skb);
5211                                 QETH_CARD_STAT_INC(card, rx_errors);
5212                                 return NULL;
5213                         }
5214                         element++;
5215                         offset = 0;
5216                         data_ptr = element->addr;
5217                 } else {
5218                         offset += data_len;
5219                 }
5220         }
5221         *__element = element;
5222         *__offset = offset;
5223         if (use_rx_sg) {
5224                 QETH_CARD_STAT_INC(card, rx_sg_skbs);
5225                 QETH_CARD_STAT_ADD(card, rx_sg_frags,
5226                                    skb_shinfo(skb)->nr_frags);
5227         }
5228         return skb;
5229 no_mem:
5230         if (net_ratelimit()) {
5231                 QETH_CARD_TEXT(card, 2, "noskbmem");
5232         }
5233         QETH_CARD_STAT_INC(card, rx_dropped);
5234         return NULL;
5235 }
5236 EXPORT_SYMBOL_GPL(qeth_core_get_next_skb);
5237
5238 int qeth_poll(struct napi_struct *napi, int budget)
5239 {
5240         struct qeth_card *card = container_of(napi, struct qeth_card, napi);
5241         int work_done = 0;
5242         struct qeth_qdio_buffer *buffer;
5243         int done;
5244         int new_budget = budget;
5245
5246         while (1) {
5247                 if (!card->rx.b_count) {
5248                         card->rx.qdio_err = 0;
5249                         card->rx.b_count = qdio_get_next_buffers(
5250                                 card->data.ccwdev, 0, &card->rx.b_index,
5251                                 &card->rx.qdio_err);
5252                         if (card->rx.b_count <= 0) {
5253                                 card->rx.b_count = 0;
5254                                 break;
5255                         }
5256                         card->rx.b_element =
5257                                 &card->qdio.in_q->bufs[card->rx.b_index]
5258                                 .buffer->element[0];
5259                         card->rx.e_offset = 0;
5260                 }
5261
5262                 while (card->rx.b_count) {
5263                         buffer = &card->qdio.in_q->bufs[card->rx.b_index];
5264                         if (!(card->rx.qdio_err &&
5265                             qeth_check_qdio_errors(card, buffer->buffer,
5266                             card->rx.qdio_err, "qinerr")))
5267                                 work_done +=
5268                                         card->discipline->process_rx_buffer(
5269                                                 card, new_budget, &done);
5270                         else
5271                                 done = 1;
5272
5273                         if (done) {
5274                                 QETH_CARD_STAT_INC(card, rx_bufs);
5275                                 qeth_put_buffer_pool_entry(card,
5276                                         buffer->pool_entry);
5277                                 qeth_queue_input_buffer(card, card->rx.b_index);
5278                                 card->rx.b_count--;
5279                                 if (card->rx.b_count) {
5280                                         card->rx.b_index =
5281                                                 (card->rx.b_index + 1) %
5282                                                 QDIO_MAX_BUFFERS_PER_Q;
5283                                         card->rx.b_element =
5284                                                 &card->qdio.in_q
5285                                                 ->bufs[card->rx.b_index]
5286                                                 .buffer->element[0];
5287                                         card->rx.e_offset = 0;
5288                                 }
5289                         }
5290
5291                         if (work_done >= budget)
5292                                 goto out;
5293                         else
5294                                 new_budget = budget - work_done;
5295                 }
5296         }
5297
5298         napi_complete_done(napi, work_done);
5299         if (qdio_start_irq(card->data.ccwdev, 0))
5300                 napi_schedule(&card->napi);
5301 out:
5302         return work_done;
5303 }
5304 EXPORT_SYMBOL_GPL(qeth_poll);
5305
5306 static int qeth_setassparms_inspect_rc(struct qeth_ipa_cmd *cmd)
5307 {
5308         if (!cmd->hdr.return_code)
5309                 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
5310         return cmd->hdr.return_code;
5311 }
5312
5313 static int qeth_setassparms_get_caps_cb(struct qeth_card *card,
5314                                         struct qeth_reply *reply,
5315                                         unsigned long data)
5316 {
5317         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5318         struct qeth_ipa_caps *caps = reply->param;
5319
5320         if (qeth_setassparms_inspect_rc(cmd))
5321                 return -EIO;
5322
5323         caps->supported = cmd->data.setassparms.data.caps.supported;
5324         caps->enabled = cmd->data.setassparms.data.caps.enabled;
5325         return 0;
5326 }
5327
5328 int qeth_setassparms_cb(struct qeth_card *card,
5329                         struct qeth_reply *reply, unsigned long data)
5330 {
5331         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5332
5333         QETH_CARD_TEXT(card, 4, "defadpcb");
5334
5335         if (cmd->hdr.return_code)
5336                 return -EIO;
5337
5338         cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
5339         if (cmd->hdr.prot_version == QETH_PROT_IPV4)
5340                 card->options.ipa4.enabled_funcs = cmd->hdr.ipa_enabled;
5341         if (cmd->hdr.prot_version == QETH_PROT_IPV6)
5342                 card->options.ipa6.enabled_funcs = cmd->hdr.ipa_enabled;
5343         return 0;
5344 }
5345 EXPORT_SYMBOL_GPL(qeth_setassparms_cb);
5346
5347 struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card,
5348                                                  enum qeth_ipa_funcs ipa_func,
5349                                                  __u16 cmd_code, __u16 len,
5350                                                  enum qeth_prot_versions prot)
5351 {
5352         struct qeth_cmd_buffer *iob;
5353         struct qeth_ipa_cmd *cmd;
5354
5355         QETH_CARD_TEXT(card, 4, "getasscm");
5356         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SETASSPARMS, prot);
5357
5358         if (iob) {
5359                 cmd = __ipa_cmd(iob);
5360                 cmd->data.setassparms.hdr.assist_no = ipa_func;
5361                 cmd->data.setassparms.hdr.length = 8 + len;
5362                 cmd->data.setassparms.hdr.command_code = cmd_code;
5363         }
5364
5365         return iob;
5366 }
5367 EXPORT_SYMBOL_GPL(qeth_get_setassparms_cmd);
5368
5369 int qeth_send_simple_setassparms_prot(struct qeth_card *card,
5370                                       enum qeth_ipa_funcs ipa_func,
5371                                       u16 cmd_code, long data,
5372                                       enum qeth_prot_versions prot)
5373 {
5374         int length = 0;
5375         struct qeth_cmd_buffer *iob;
5376
5377         QETH_CARD_TEXT_(card, 4, "simassp%i", prot);
5378         if (data)
5379                 length = sizeof(__u32);
5380         iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code, length, prot);
5381         if (!iob)
5382                 return -ENOMEM;
5383
5384         __ipa_cmd(iob)->data.setassparms.data.flags_32bit = (__u32) data;
5385         return qeth_send_ipa_cmd(card, iob, qeth_setassparms_cb, NULL);
5386 }
5387 EXPORT_SYMBOL_GPL(qeth_send_simple_setassparms_prot);
5388
5389 static void qeth_unregister_dbf_views(void)
5390 {
5391         int x;
5392         for (x = 0; x < QETH_DBF_INFOS; x++) {
5393                 debug_unregister(qeth_dbf[x].id);
5394                 qeth_dbf[x].id = NULL;
5395         }
5396 }
5397
5398 void qeth_dbf_longtext(debug_info_t *id, int level, char *fmt, ...)
5399 {
5400         char dbf_txt_buf[32];
5401         va_list args;
5402
5403         if (!debug_level_enabled(id, level))
5404                 return;
5405         va_start(args, fmt);
5406         vsnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
5407         va_end(args);
5408         debug_text_event(id, level, dbf_txt_buf);
5409 }
5410 EXPORT_SYMBOL_GPL(qeth_dbf_longtext);
5411
5412 static int qeth_register_dbf_views(void)
5413 {
5414         int ret;
5415         int x;
5416
5417         for (x = 0; x < QETH_DBF_INFOS; x++) {
5418                 /* register the areas */
5419                 qeth_dbf[x].id = debug_register(qeth_dbf[x].name,
5420                                                 qeth_dbf[x].pages,
5421                                                 qeth_dbf[x].areas,
5422                                                 qeth_dbf[x].len);
5423                 if (qeth_dbf[x].id == NULL) {
5424                         qeth_unregister_dbf_views();
5425                         return -ENOMEM;
5426                 }
5427
5428                 /* register a view */
5429                 ret = debug_register_view(qeth_dbf[x].id, qeth_dbf[x].view);
5430                 if (ret) {
5431                         qeth_unregister_dbf_views();
5432                         return ret;
5433                 }
5434
5435                 /* set a passing level */
5436                 debug_set_level(qeth_dbf[x].id, qeth_dbf[x].level);
5437         }
5438
5439         return 0;
5440 }
5441
5442 static DEFINE_MUTEX(qeth_mod_mutex);    /* for synchronized module loading */
5443
5444 int qeth_core_load_discipline(struct qeth_card *card,
5445                 enum qeth_discipline_id discipline)
5446 {
5447         mutex_lock(&qeth_mod_mutex);
5448         switch (discipline) {
5449         case QETH_DISCIPLINE_LAYER3:
5450                 card->discipline = try_then_request_module(
5451                         symbol_get(qeth_l3_discipline), "qeth_l3");
5452                 break;
5453         case QETH_DISCIPLINE_LAYER2:
5454                 card->discipline = try_then_request_module(
5455                         symbol_get(qeth_l2_discipline), "qeth_l2");
5456                 break;
5457         default:
5458                 break;
5459         }
5460         mutex_unlock(&qeth_mod_mutex);
5461
5462         if (!card->discipline) {
5463                 dev_err(&card->gdev->dev, "There is no kernel module to "
5464                         "support discipline %d\n", discipline);
5465                 return -EINVAL;
5466         }
5467
5468         card->options.layer = discipline;
5469         return 0;
5470 }
5471
5472 void qeth_core_free_discipline(struct qeth_card *card)
5473 {
5474         if (IS_LAYER2(card))
5475                 symbol_put(qeth_l2_discipline);
5476         else
5477                 symbol_put(qeth_l3_discipline);
5478         card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
5479         card->discipline = NULL;
5480 }
5481
5482 const struct device_type qeth_generic_devtype = {
5483         .name = "qeth_generic",
5484         .groups = qeth_generic_attr_groups,
5485 };
5486 EXPORT_SYMBOL_GPL(qeth_generic_devtype);
5487
5488 static const struct device_type qeth_osn_devtype = {
5489         .name = "qeth_osn",
5490         .groups = qeth_osn_attr_groups,
5491 };
5492
5493 #define DBF_NAME_LEN    20
5494
5495 struct qeth_dbf_entry {
5496         char dbf_name[DBF_NAME_LEN];
5497         debug_info_t *dbf_info;
5498         struct list_head dbf_list;
5499 };
5500
5501 static LIST_HEAD(qeth_dbf_list);
5502 static DEFINE_MUTEX(qeth_dbf_list_mutex);
5503
5504 static debug_info_t *qeth_get_dbf_entry(char *name)
5505 {
5506         struct qeth_dbf_entry *entry;
5507         debug_info_t *rc = NULL;
5508
5509         mutex_lock(&qeth_dbf_list_mutex);
5510         list_for_each_entry(entry, &qeth_dbf_list, dbf_list) {
5511                 if (strcmp(entry->dbf_name, name) == 0) {
5512                         rc = entry->dbf_info;
5513                         break;
5514                 }
5515         }
5516         mutex_unlock(&qeth_dbf_list_mutex);
5517         return rc;
5518 }
5519
5520 static int qeth_add_dbf_entry(struct qeth_card *card, char *name)
5521 {
5522         struct qeth_dbf_entry *new_entry;
5523
5524         card->debug = debug_register(name, 2, 1, 8);
5525         if (!card->debug) {
5526                 QETH_DBF_TEXT_(SETUP, 2, "%s", "qcdbf");
5527                 goto err;
5528         }
5529         if (debug_register_view(card->debug, &debug_hex_ascii_view))
5530                 goto err_dbg;
5531         new_entry = kzalloc(sizeof(struct qeth_dbf_entry), GFP_KERNEL);
5532         if (!new_entry)
5533                 goto err_dbg;
5534         strncpy(new_entry->dbf_name, name, DBF_NAME_LEN);
5535         new_entry->dbf_info = card->debug;
5536         mutex_lock(&qeth_dbf_list_mutex);
5537         list_add(&new_entry->dbf_list, &qeth_dbf_list);
5538         mutex_unlock(&qeth_dbf_list_mutex);
5539
5540         return 0;
5541
5542 err_dbg:
5543         debug_unregister(card->debug);
5544 err:
5545         return -ENOMEM;
5546 }
5547
5548 static void qeth_clear_dbf_list(void)
5549 {
5550         struct qeth_dbf_entry *entry, *tmp;
5551
5552         mutex_lock(&qeth_dbf_list_mutex);
5553         list_for_each_entry_safe(entry, tmp, &qeth_dbf_list, dbf_list) {
5554                 list_del(&entry->dbf_list);
5555                 debug_unregister(entry->dbf_info);
5556                 kfree(entry);
5557         }
5558         mutex_unlock(&qeth_dbf_list_mutex);
5559 }
5560
5561 static struct net_device *qeth_alloc_netdev(struct qeth_card *card)
5562 {
5563         struct net_device *dev;
5564
5565         switch (card->info.type) {
5566         case QETH_CARD_TYPE_IQD:
5567                 dev = alloc_netdev_mqs(0, "hsi%d", NET_NAME_UNKNOWN,
5568                                        ether_setup, QETH_MAX_QUEUES, 1);
5569                 break;
5570         case QETH_CARD_TYPE_OSM:
5571                 dev = alloc_etherdev(0);
5572                 break;
5573         case QETH_CARD_TYPE_OSN:
5574                 dev = alloc_netdev(0, "osn%d", NET_NAME_UNKNOWN, ether_setup);
5575                 break;
5576         default:
5577                 dev = alloc_etherdev_mqs(0, QETH_MAX_QUEUES, 1);
5578         }
5579
5580         if (!dev)
5581                 return NULL;
5582
5583         dev->ml_priv = card;
5584         dev->watchdog_timeo = QETH_TX_TIMEOUT;
5585         dev->min_mtu = IS_OSN(card) ? 64 : 576;
5586          /* initialized when device first goes online: */
5587         dev->max_mtu = 0;
5588         dev->mtu = 0;
5589         SET_NETDEV_DEV(dev, &card->gdev->dev);
5590         netif_carrier_off(dev);
5591
5592         if (IS_OSN(card)) {
5593                 dev->ethtool_ops = &qeth_osn_ethtool_ops;
5594         } else {
5595                 dev->ethtool_ops = &qeth_ethtool_ops;
5596                 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
5597                 dev->hw_features |= NETIF_F_SG;
5598                 dev->vlan_features |= NETIF_F_SG;
5599                 if (IS_IQD(card)) {
5600                         netif_set_real_num_tx_queues(dev, QETH_IQD_MIN_TXQ);
5601                         dev->features |= NETIF_F_SG;
5602                 }
5603         }
5604
5605         return dev;
5606 }
5607
5608 struct net_device *qeth_clone_netdev(struct net_device *orig)
5609 {
5610         struct net_device *clone = qeth_alloc_netdev(orig->ml_priv);
5611
5612         if (!clone)
5613                 return NULL;
5614
5615         clone->dev_port = orig->dev_port;
5616         return clone;
5617 }
5618
5619 static int qeth_core_probe_device(struct ccwgroup_device *gdev)
5620 {
5621         struct qeth_card *card;
5622         struct device *dev;
5623         int rc;
5624         enum qeth_discipline_id enforced_disc;
5625         char dbf_name[DBF_NAME_LEN];
5626
5627         QETH_DBF_TEXT(SETUP, 2, "probedev");
5628
5629         dev = &gdev->dev;
5630         if (!get_device(dev))
5631                 return -ENODEV;
5632
5633         QETH_DBF_TEXT_(SETUP, 2, "%s", dev_name(&gdev->dev));
5634
5635         card = qeth_alloc_card(gdev);
5636         if (!card) {
5637                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM);
5638                 rc = -ENOMEM;
5639                 goto err_dev;
5640         }
5641
5642         snprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
5643                 dev_name(&gdev->dev));
5644         card->debug = qeth_get_dbf_entry(dbf_name);
5645         if (!card->debug) {
5646                 rc = qeth_add_dbf_entry(card, dbf_name);
5647                 if (rc)
5648                         goto err_card;
5649         }
5650
5651         qeth_setup_card(card);
5652         card->dev = qeth_alloc_netdev(card);
5653         if (!card->dev) {
5654                 rc = -ENOMEM;
5655                 goto err_card;
5656         }
5657
5658         card->qdio.no_out_queues = card->dev->num_tx_queues;
5659         rc = qeth_update_from_chp_desc(card);
5660         if (rc)
5661                 goto err_chp_desc;
5662         qeth_determine_capabilities(card);
5663         enforced_disc = qeth_enforce_discipline(card);
5664         switch (enforced_disc) {
5665         case QETH_DISCIPLINE_UNDETERMINED:
5666                 gdev->dev.type = &qeth_generic_devtype;
5667                 break;
5668         default:
5669                 card->info.layer_enforced = true;
5670                 rc = qeth_core_load_discipline(card, enforced_disc);
5671                 if (rc)
5672                         goto err_load;
5673
5674                 gdev->dev.type = IS_OSN(card) ? &qeth_osn_devtype :
5675                                                 card->discipline->devtype;
5676                 rc = card->discipline->setup(card->gdev);
5677                 if (rc)
5678                         goto err_disc;
5679                 break;
5680         }
5681
5682         return 0;
5683
5684 err_disc:
5685         qeth_core_free_discipline(card);
5686 err_load:
5687 err_chp_desc:
5688         free_netdev(card->dev);
5689 err_card:
5690         qeth_core_free_card(card);
5691 err_dev:
5692         put_device(dev);
5693         return rc;
5694 }
5695
5696 static void qeth_core_remove_device(struct ccwgroup_device *gdev)
5697 {
5698         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5699
5700         QETH_DBF_TEXT(SETUP, 2, "removedv");
5701
5702         if (card->discipline) {
5703                 card->discipline->remove(gdev);
5704                 qeth_core_free_discipline(card);
5705         }
5706
5707         free_netdev(card->dev);
5708         qeth_core_free_card(card);
5709         put_device(&gdev->dev);
5710 }
5711
5712 static int qeth_core_set_online(struct ccwgroup_device *gdev)
5713 {
5714         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5715         int rc = 0;
5716         enum qeth_discipline_id def_discipline;
5717
5718         if (!card->discipline) {
5719                 def_discipline = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
5720                                                 QETH_DISCIPLINE_LAYER2;
5721                 rc = qeth_core_load_discipline(card, def_discipline);
5722                 if (rc)
5723                         goto err;
5724                 rc = card->discipline->setup(card->gdev);
5725                 if (rc) {
5726                         qeth_core_free_discipline(card);
5727                         goto err;
5728                 }
5729         }
5730         rc = card->discipline->set_online(gdev);
5731 err:
5732         return rc;
5733 }
5734
5735 static int qeth_core_set_offline(struct ccwgroup_device *gdev)
5736 {
5737         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5738         return card->discipline->set_offline(gdev);
5739 }
5740
5741 static void qeth_core_shutdown(struct ccwgroup_device *gdev)
5742 {
5743         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5744         qeth_set_allowed_threads(card, 0, 1);
5745         if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
5746                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
5747         qeth_qdio_clear_card(card, 0);
5748         qeth_drain_output_queues(card);
5749         qdio_free(CARD_DDEV(card));
5750 }
5751
5752 static int qeth_core_freeze(struct ccwgroup_device *gdev)
5753 {
5754         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5755         if (card->discipline && card->discipline->freeze)
5756                 return card->discipline->freeze(gdev);
5757         return 0;
5758 }
5759
5760 static int qeth_core_thaw(struct ccwgroup_device *gdev)
5761 {
5762         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5763         if (card->discipline && card->discipline->thaw)
5764                 return card->discipline->thaw(gdev);
5765         return 0;
5766 }
5767
5768 static int qeth_core_restore(struct ccwgroup_device *gdev)
5769 {
5770         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5771         if (card->discipline && card->discipline->restore)
5772                 return card->discipline->restore(gdev);
5773         return 0;
5774 }
5775
5776 static ssize_t group_store(struct device_driver *ddrv, const char *buf,
5777                            size_t count)
5778 {
5779         int err;
5780
5781         err = ccwgroup_create_dev(qeth_core_root_dev, to_ccwgroupdrv(ddrv), 3,
5782                                   buf);
5783
5784         return err ? err : count;
5785 }
5786 static DRIVER_ATTR_WO(group);
5787
5788 static struct attribute *qeth_drv_attrs[] = {
5789         &driver_attr_group.attr,
5790         NULL,
5791 };
5792 static struct attribute_group qeth_drv_attr_group = {
5793         .attrs = qeth_drv_attrs,
5794 };
5795 static const struct attribute_group *qeth_drv_attr_groups[] = {
5796         &qeth_drv_attr_group,
5797         NULL,
5798 };
5799
5800 static struct ccwgroup_driver qeth_core_ccwgroup_driver = {
5801         .driver = {
5802                 .groups = qeth_drv_attr_groups,
5803                 .owner = THIS_MODULE,
5804                 .name = "qeth",
5805         },
5806         .ccw_driver = &qeth_ccw_driver,
5807         .setup = qeth_core_probe_device,
5808         .remove = qeth_core_remove_device,
5809         .set_online = qeth_core_set_online,
5810         .set_offline = qeth_core_set_offline,
5811         .shutdown = qeth_core_shutdown,
5812         .prepare = NULL,
5813         .complete = NULL,
5814         .freeze = qeth_core_freeze,
5815         .thaw = qeth_core_thaw,
5816         .restore = qeth_core_restore,
5817 };
5818
5819 struct qeth_card *qeth_get_card_by_busid(char *bus_id)
5820 {
5821         struct ccwgroup_device *gdev;
5822         struct qeth_card *card;
5823
5824         gdev = get_ccwgroupdev_by_busid(&qeth_core_ccwgroup_driver, bus_id);
5825         if (!gdev)
5826                 return NULL;
5827
5828         card = dev_get_drvdata(&gdev->dev);
5829         put_device(&gdev->dev);
5830         return card;
5831 }
5832 EXPORT_SYMBOL_GPL(qeth_get_card_by_busid);
5833
5834 int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
5835 {
5836         struct qeth_card *card = dev->ml_priv;
5837         struct mii_ioctl_data *mii_data;
5838         int rc = 0;
5839
5840         if (!card)
5841                 return -ENODEV;
5842
5843         switch (cmd) {
5844         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
5845                 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
5846                 break;
5847         case SIOC_QETH_GET_CARD_TYPE:
5848                 if ((IS_OSD(card) || IS_OSM(card) || IS_OSX(card)) &&
5849                     !IS_VM_NIC(card))
5850                         return 1;
5851                 return 0;
5852         case SIOCGMIIPHY:
5853                 mii_data = if_mii(rq);
5854                 mii_data->phy_id = 0;
5855                 break;
5856         case SIOCGMIIREG:
5857                 mii_data = if_mii(rq);
5858                 if (mii_data->phy_id != 0)
5859                         rc = -EINVAL;
5860                 else
5861                         mii_data->val_out = qeth_mdio_read(dev,
5862                                 mii_data->phy_id, mii_data->reg_num);
5863                 break;
5864         case SIOC_QETH_QUERY_OAT:
5865                 rc = qeth_query_oat_command(card, rq->ifr_ifru.ifru_data);
5866                 break;
5867         default:
5868                 if (card->discipline->do_ioctl)
5869                         rc = card->discipline->do_ioctl(dev, rq, cmd);
5870                 else
5871                         rc = -EOPNOTSUPP;
5872         }
5873         if (rc)
5874                 QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
5875         return rc;
5876 }
5877 EXPORT_SYMBOL_GPL(qeth_do_ioctl);
5878
5879 static int qeth_start_csum_cb(struct qeth_card *card, struct qeth_reply *reply,
5880                               unsigned long data)
5881 {
5882         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5883         u32 *features = reply->param;
5884
5885         if (qeth_setassparms_inspect_rc(cmd))
5886                 return -EIO;
5887
5888         *features = cmd->data.setassparms.data.flags_32bit;
5889         return 0;
5890 }
5891
5892 static int qeth_set_csum_off(struct qeth_card *card, enum qeth_ipa_funcs cstype,
5893                              enum qeth_prot_versions prot)
5894 {
5895         return qeth_send_simple_setassparms_prot(card, cstype,
5896                                                  IPA_CMD_ASS_STOP, 0, prot);
5897 }
5898
5899 static int qeth_set_csum_on(struct qeth_card *card, enum qeth_ipa_funcs cstype,
5900                             enum qeth_prot_versions prot)
5901 {
5902         u32 required_features = QETH_IPA_CHECKSUM_UDP | QETH_IPA_CHECKSUM_TCP;
5903         struct qeth_cmd_buffer *iob;
5904         struct qeth_ipa_caps caps;
5905         u32 features;
5906         int rc;
5907
5908         /* some L3 HW requires combined L3+L4 csum offload: */
5909         if (IS_LAYER3(card) && prot == QETH_PROT_IPV4 &&
5910             cstype == IPA_OUTBOUND_CHECKSUM)
5911                 required_features |= QETH_IPA_CHECKSUM_IP_HDR;
5912
5913         iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_START, 0,
5914                                        prot);
5915         if (!iob)
5916                 return -ENOMEM;
5917
5918         rc = qeth_send_ipa_cmd(card, iob, qeth_start_csum_cb, &features);
5919         if (rc)
5920                 return rc;
5921
5922         if ((required_features & features) != required_features) {
5923                 qeth_set_csum_off(card, cstype, prot);
5924                 return -EOPNOTSUPP;
5925         }
5926
5927         iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_ENABLE, 4,
5928                                        prot);
5929         if (!iob) {
5930                 qeth_set_csum_off(card, cstype, prot);
5931                 return -ENOMEM;
5932         }
5933
5934         if (features & QETH_IPA_CHECKSUM_LP2LP)
5935                 required_features |= QETH_IPA_CHECKSUM_LP2LP;
5936         __ipa_cmd(iob)->data.setassparms.data.flags_32bit = required_features;
5937         rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
5938         if (rc) {
5939                 qeth_set_csum_off(card, cstype, prot);
5940                 return rc;
5941         }
5942
5943         if (!qeth_ipa_caps_supported(&caps, required_features) ||
5944             !qeth_ipa_caps_enabled(&caps, required_features)) {
5945                 qeth_set_csum_off(card, cstype, prot);
5946                 return -EOPNOTSUPP;
5947         }
5948
5949         dev_info(&card->gdev->dev, "HW Checksumming (%sbound IPv%d) enabled\n",
5950                  cstype == IPA_INBOUND_CHECKSUM ? "in" : "out", prot);
5951         if (!qeth_ipa_caps_enabled(&caps, QETH_IPA_CHECKSUM_LP2LP) &&
5952             cstype == IPA_OUTBOUND_CHECKSUM)
5953                 dev_warn(&card->gdev->dev,
5954                          "Hardware checksumming is performed only if %s and its peer use different OSA Express 3 ports\n",
5955                          QETH_CARD_IFNAME(card));
5956         return 0;
5957 }
5958
5959 static int qeth_set_ipa_csum(struct qeth_card *card, bool on, int cstype,
5960                              enum qeth_prot_versions prot)
5961 {
5962         return on ? qeth_set_csum_on(card, cstype, prot) :
5963                     qeth_set_csum_off(card, cstype, prot);
5964 }
5965
5966 static int qeth_start_tso_cb(struct qeth_card *card, struct qeth_reply *reply,
5967                              unsigned long data)
5968 {
5969         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5970         struct qeth_tso_start_data *tso_data = reply->param;
5971
5972         if (qeth_setassparms_inspect_rc(cmd))
5973                 return -EIO;
5974
5975         tso_data->mss = cmd->data.setassparms.data.tso.mss;
5976         tso_data->supported = cmd->data.setassparms.data.tso.supported;
5977         return 0;
5978 }
5979
5980 static int qeth_set_tso_off(struct qeth_card *card,
5981                             enum qeth_prot_versions prot)
5982 {
5983         return qeth_send_simple_setassparms_prot(card, IPA_OUTBOUND_TSO,
5984                                                  IPA_CMD_ASS_STOP, 0, prot);
5985 }
5986
5987 static int qeth_set_tso_on(struct qeth_card *card,
5988                            enum qeth_prot_versions prot)
5989 {
5990         struct qeth_tso_start_data tso_data;
5991         struct qeth_cmd_buffer *iob;
5992         struct qeth_ipa_caps caps;
5993         int rc;
5994
5995         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
5996                                        IPA_CMD_ASS_START, 0, prot);
5997         if (!iob)
5998                 return -ENOMEM;
5999
6000         rc = qeth_send_ipa_cmd(card, iob, qeth_start_tso_cb, &tso_data);
6001         if (rc)
6002                 return rc;
6003
6004         if (!tso_data.mss || !(tso_data.supported & QETH_IPA_LARGE_SEND_TCP)) {
6005                 qeth_set_tso_off(card, prot);
6006                 return -EOPNOTSUPP;
6007         }
6008
6009         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6010                                        IPA_CMD_ASS_ENABLE, sizeof(caps), prot);
6011         if (!iob) {
6012                 qeth_set_tso_off(card, prot);
6013                 return -ENOMEM;
6014         }
6015
6016         /* enable TSO capability */
6017         __ipa_cmd(iob)->data.setassparms.data.caps.enabled =
6018                 QETH_IPA_LARGE_SEND_TCP;
6019         rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6020         if (rc) {
6021                 qeth_set_tso_off(card, prot);
6022                 return rc;
6023         }
6024
6025         if (!qeth_ipa_caps_supported(&caps, QETH_IPA_LARGE_SEND_TCP) ||
6026             !qeth_ipa_caps_enabled(&caps, QETH_IPA_LARGE_SEND_TCP)) {
6027                 qeth_set_tso_off(card, prot);
6028                 return -EOPNOTSUPP;
6029         }
6030
6031         dev_info(&card->gdev->dev, "TSOv%u enabled (MSS: %u)\n", prot,
6032                  tso_data.mss);
6033         return 0;
6034 }
6035
6036 static int qeth_set_ipa_tso(struct qeth_card *card, bool on,
6037                             enum qeth_prot_versions prot)
6038 {
6039         return on ? qeth_set_tso_on(card, prot) : qeth_set_tso_off(card, prot);
6040 }
6041
6042 static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on)
6043 {
6044         int rc_ipv4 = (on) ? -EOPNOTSUPP : 0;
6045         int rc_ipv6;
6046
6047         if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
6048                 rc_ipv4 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6049                                             QETH_PROT_IPV4);
6050         if (!qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6051                 /* no/one Offload Assist available, so the rc is trivial */
6052                 return rc_ipv4;
6053
6054         rc_ipv6 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6055                                     QETH_PROT_IPV6);
6056
6057         if (on)
6058                 /* enable: success if any Assist is active */
6059                 return (rc_ipv6) ? rc_ipv4 : 0;
6060
6061         /* disable: failure if any Assist is still active */
6062         return (rc_ipv6) ? rc_ipv6 : rc_ipv4;
6063 }
6064
6065 /**
6066  * qeth_enable_hw_features() - (Re-)Enable HW functions for device features
6067  * @dev:        a net_device
6068  */
6069 void qeth_enable_hw_features(struct net_device *dev)
6070 {
6071         struct qeth_card *card = dev->ml_priv;
6072         netdev_features_t features;
6073
6074         features = dev->features;
6075         /* force-off any feature that might need an IPA sequence.
6076          * netdev_update_features() will restart them.
6077          */
6078         dev->features &= ~dev->hw_features;
6079         /* toggle VLAN filter, so that VIDs are re-programmed: */
6080         if (IS_LAYER2(card) && IS_VM_NIC(card)) {
6081                 dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
6082                 dev->wanted_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
6083         }
6084         netdev_update_features(dev);
6085         if (features != dev->features)
6086                 dev_warn(&card->gdev->dev,
6087                          "Device recovery failed to restore all offload features\n");
6088 }
6089 EXPORT_SYMBOL_GPL(qeth_enable_hw_features);
6090
6091 int qeth_set_features(struct net_device *dev, netdev_features_t features)
6092 {
6093         struct qeth_card *card = dev->ml_priv;
6094         netdev_features_t changed = dev->features ^ features;
6095         int rc = 0;
6096
6097         QETH_DBF_TEXT(SETUP, 2, "setfeat");
6098         QETH_DBF_HEX(SETUP, 2, &features, sizeof(features));
6099
6100         if ((changed & NETIF_F_IP_CSUM)) {
6101                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IP_CSUM,
6102                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV4);
6103                 if (rc)
6104                         changed ^= NETIF_F_IP_CSUM;
6105         }
6106         if (changed & NETIF_F_IPV6_CSUM) {
6107                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IPV6_CSUM,
6108                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV6);
6109                 if (rc)
6110                         changed ^= NETIF_F_IPV6_CSUM;
6111         }
6112         if (changed & NETIF_F_RXCSUM) {
6113                 rc = qeth_set_ipa_rx_csum(card, features & NETIF_F_RXCSUM);
6114                 if (rc)
6115                         changed ^= NETIF_F_RXCSUM;
6116         }
6117         if (changed & NETIF_F_TSO) {
6118                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO,
6119                                       QETH_PROT_IPV4);
6120                 if (rc)
6121                         changed ^= NETIF_F_TSO;
6122         }
6123         if (changed & NETIF_F_TSO6) {
6124                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO6,
6125                                       QETH_PROT_IPV6);
6126                 if (rc)
6127                         changed ^= NETIF_F_TSO6;
6128         }
6129
6130         /* everything changed successfully? */
6131         if ((dev->features ^ features) == changed)
6132                 return 0;
6133         /* something went wrong. save changed features and return error */
6134         dev->features ^= changed;
6135         return -EIO;
6136 }
6137 EXPORT_SYMBOL_GPL(qeth_set_features);
6138
6139 netdev_features_t qeth_fix_features(struct net_device *dev,
6140                                     netdev_features_t features)
6141 {
6142         struct qeth_card *card = dev->ml_priv;
6143
6144         QETH_DBF_TEXT(SETUP, 2, "fixfeat");
6145         if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM))
6146                 features &= ~NETIF_F_IP_CSUM;
6147         if (!qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6))
6148                 features &= ~NETIF_F_IPV6_CSUM;
6149         if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM) &&
6150             !qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6151                 features &= ~NETIF_F_RXCSUM;
6152         if (!qeth_is_supported(card, IPA_OUTBOUND_TSO))
6153                 features &= ~NETIF_F_TSO;
6154         if (!qeth_is_supported6(card, IPA_OUTBOUND_TSO))
6155                 features &= ~NETIF_F_TSO6;
6156
6157         QETH_DBF_HEX(SETUP, 2, &features, sizeof(features));
6158         return features;
6159 }
6160 EXPORT_SYMBOL_GPL(qeth_fix_features);
6161
6162 netdev_features_t qeth_features_check(struct sk_buff *skb,
6163                                       struct net_device *dev,
6164                                       netdev_features_t features)
6165 {
6166         /* GSO segmentation builds skbs with
6167          *      a (small) linear part for the headers, and
6168          *      page frags for the data.
6169          * Compared to a linear skb, the header-only part consumes an
6170          * additional buffer element. This reduces buffer utilization, and
6171          * hurts throughput. So compress small segments into one element.
6172          */
6173         if (netif_needs_gso(skb, features)) {
6174                 /* match skb_segment(): */
6175                 unsigned int doffset = skb->data - skb_mac_header(skb);
6176                 unsigned int hsize = skb_shinfo(skb)->gso_size;
6177                 unsigned int hroom = skb_headroom(skb);
6178
6179                 /* linearize only if resulting skb allocations are order-0: */
6180                 if (SKB_DATA_ALIGN(hroom + doffset + hsize) <= SKB_MAX_HEAD(0))
6181                         features &= ~NETIF_F_SG;
6182         }
6183
6184         return vlan_features_check(skb, features);
6185 }
6186 EXPORT_SYMBOL_GPL(qeth_features_check);
6187
6188 void qeth_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
6189 {
6190         struct qeth_card *card = dev->ml_priv;
6191         struct qeth_qdio_out_q *queue;
6192         unsigned int i;
6193
6194         QETH_CARD_TEXT(card, 5, "getstat");
6195
6196         stats->rx_packets = card->stats.rx_packets;
6197         stats->rx_bytes = card->stats.rx_bytes;
6198         stats->rx_errors = card->stats.rx_errors;
6199         stats->rx_dropped = card->stats.rx_dropped;
6200         stats->multicast = card->stats.rx_multicast;
6201
6202         for (i = 0; i < card->qdio.no_out_queues; i++) {
6203                 queue = card->qdio.out_qs[i];
6204
6205                 stats->tx_packets += queue->stats.tx_packets;
6206                 stats->tx_bytes += queue->stats.tx_bytes;
6207                 stats->tx_errors += queue->stats.tx_errors;
6208                 stats->tx_dropped += queue->stats.tx_dropped;
6209         }
6210 }
6211 EXPORT_SYMBOL_GPL(qeth_get_stats64);
6212
6213 u16 qeth_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
6214                           u8 cast_type, struct net_device *sb_dev)
6215 {
6216         if (cast_type != RTN_UNICAST)
6217                 return QETH_IQD_MCAST_TXQ;
6218         return QETH_IQD_MIN_UCAST_TXQ;
6219 }
6220 EXPORT_SYMBOL_GPL(qeth_iqd_select_queue);
6221
6222 int qeth_open(struct net_device *dev)
6223 {
6224         struct qeth_card *card = dev->ml_priv;
6225
6226         QETH_CARD_TEXT(card, 4, "qethopen");
6227
6228         if (qdio_stop_irq(CARD_DDEV(card), 0) < 0)
6229                 return -EIO;
6230
6231         card->data.state = CH_STATE_UP;
6232         netif_tx_start_all_queues(dev);
6233
6234         napi_enable(&card->napi);
6235         local_bh_disable();
6236         napi_schedule(&card->napi);
6237         /* kick-start the NAPI softirq: */
6238         local_bh_enable();
6239         return 0;
6240 }
6241 EXPORT_SYMBOL_GPL(qeth_open);
6242
6243 int qeth_stop(struct net_device *dev)
6244 {
6245         struct qeth_card *card = dev->ml_priv;
6246
6247         QETH_CARD_TEXT(card, 4, "qethstop");
6248         netif_tx_disable(dev);
6249         napi_disable(&card->napi);
6250         return 0;
6251 }
6252 EXPORT_SYMBOL_GPL(qeth_stop);
6253
6254 static int __init qeth_core_init(void)
6255 {
6256         int rc;
6257
6258         pr_info("loading core functions\n");
6259
6260         rc = qeth_register_dbf_views();
6261         if (rc)
6262                 goto dbf_err;
6263         qeth_core_root_dev = root_device_register("qeth");
6264         rc = PTR_ERR_OR_ZERO(qeth_core_root_dev);
6265         if (rc)
6266                 goto register_err;
6267         qeth_core_header_cache =
6268                 kmem_cache_create("qeth_hdr", QETH_HDR_CACHE_OBJ_SIZE,
6269                                   roundup_pow_of_two(QETH_HDR_CACHE_OBJ_SIZE),
6270                                   0, NULL);
6271         if (!qeth_core_header_cache) {
6272                 rc = -ENOMEM;
6273                 goto slab_err;
6274         }
6275         qeth_qdio_outbuf_cache = kmem_cache_create("qeth_buf",
6276                         sizeof(struct qeth_qdio_out_buffer), 0, 0, NULL);
6277         if (!qeth_qdio_outbuf_cache) {
6278                 rc = -ENOMEM;
6279                 goto cqslab_err;
6280         }
6281         rc = ccw_driver_register(&qeth_ccw_driver);
6282         if (rc)
6283                 goto ccw_err;
6284         rc = ccwgroup_driver_register(&qeth_core_ccwgroup_driver);
6285         if (rc)
6286                 goto ccwgroup_err;
6287
6288         return 0;
6289
6290 ccwgroup_err:
6291         ccw_driver_unregister(&qeth_ccw_driver);
6292 ccw_err:
6293         kmem_cache_destroy(qeth_qdio_outbuf_cache);
6294 cqslab_err:
6295         kmem_cache_destroy(qeth_core_header_cache);
6296 slab_err:
6297         root_device_unregister(qeth_core_root_dev);
6298 register_err:
6299         qeth_unregister_dbf_views();
6300 dbf_err:
6301         pr_err("Initializing the qeth device driver failed\n");
6302         return rc;
6303 }
6304
6305 static void __exit qeth_core_exit(void)
6306 {
6307         qeth_clear_dbf_list();
6308         ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver);
6309         ccw_driver_unregister(&qeth_ccw_driver);
6310         kmem_cache_destroy(qeth_qdio_outbuf_cache);
6311         kmem_cache_destroy(qeth_core_header_cache);
6312         root_device_unregister(qeth_core_root_dev);
6313         qeth_unregister_dbf_views();
6314         pr_info("core functions removed\n");
6315 }
6316
6317 module_init(qeth_core_init);
6318 module_exit(qeth_core_exit);
6319 MODULE_AUTHOR("Frank Blaschka <[email protected]>");
6320 MODULE_DESCRIPTION("qeth core functions");
6321 MODULE_LICENSE("GPL");