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 int qeth_osa_set_output_queues(struct qeth_card *card, bool single)
1278 {
1279         unsigned int count = single ? 1 : card->dev->num_tx_queues;
1280         int rc;
1281
1282         rtnl_lock();
1283         rc = netif_set_real_num_tx_queues(card->dev, count);
1284         rtnl_unlock();
1285
1286         if (rc)
1287                 return rc;
1288
1289         if (card->qdio.no_out_queues == count)
1290                 return 0;
1291
1292         if (atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED)
1293                 qeth_free_qdio_queues(card);
1294
1295         if (count == 1)
1296                 dev_info(&card->gdev->dev, "Priority Queueing not supported\n");
1297
1298         card->qdio.default_out_queue = single ? 0 : QETH_DEFAULT_QUEUE;
1299         card->qdio.no_out_queues = count;
1300         return 0;
1301 }
1302
1303 static int qeth_update_from_chp_desc(struct qeth_card *card)
1304 {
1305         struct ccw_device *ccwdev;
1306         struct channel_path_desc_fmt0 *chp_dsc;
1307         int rc = 0;
1308
1309         QETH_DBF_TEXT(SETUP, 2, "chp_desc");
1310
1311         ccwdev = card->data.ccwdev;
1312         chp_dsc = ccw_device_get_chp_desc(ccwdev, 0);
1313         if (!chp_dsc)
1314                 return -ENOMEM;
1315
1316         card->info.func_level = 0x4100 + chp_dsc->desc;
1317
1318         if (IS_OSD(card) || IS_OSX(card))
1319                 /* CHPP field bit 6 == 1 -> single queue */
1320                 rc = qeth_osa_set_output_queues(card, chp_dsc->chpp & 0x02);
1321
1322         kfree(chp_dsc);
1323         QETH_DBF_TEXT_(SETUP, 2, "nr:%x", card->qdio.no_out_queues);
1324         QETH_DBF_TEXT_(SETUP, 2, "lvl:%02x", card->info.func_level);
1325         return rc;
1326 }
1327
1328 static void qeth_init_qdio_info(struct qeth_card *card)
1329 {
1330         QETH_DBF_TEXT(SETUP, 4, "intqdinf");
1331         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
1332         card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT;
1333         card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
1334
1335         /* inbound */
1336         card->qdio.no_in_queues = 1;
1337         card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
1338         if (IS_IQD(card))
1339                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_HSDEFAULT;
1340         else
1341                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_DEFAULT;
1342         card->qdio.in_buf_pool.buf_count = card->qdio.init_pool.buf_count;
1343         INIT_LIST_HEAD(&card->qdio.in_buf_pool.entry_list);
1344         INIT_LIST_HEAD(&card->qdio.init_pool.entry_list);
1345 }
1346
1347 static void qeth_set_initial_options(struct qeth_card *card)
1348 {
1349         card->options.route4.type = NO_ROUTER;
1350         card->options.route6.type = NO_ROUTER;
1351         card->options.rx_sg_cb = QETH_RX_SG_CB;
1352         card->options.isolation = ISOLATION_MODE_NONE;
1353         card->options.cq = QETH_CQ_DISABLED;
1354         card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
1355 }
1356
1357 static int qeth_do_start_thread(struct qeth_card *card, unsigned long thread)
1358 {
1359         unsigned long flags;
1360         int rc = 0;
1361
1362         spin_lock_irqsave(&card->thread_mask_lock, flags);
1363         QETH_CARD_TEXT_(card, 4, "  %02x%02x%02x",
1364                         (u8) card->thread_start_mask,
1365                         (u8) card->thread_allowed_mask,
1366                         (u8) card->thread_running_mask);
1367         rc = (card->thread_start_mask & thread);
1368         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1369         return rc;
1370 }
1371
1372 static void qeth_start_kernel_thread(struct work_struct *work)
1373 {
1374         struct task_struct *ts;
1375         struct qeth_card *card = container_of(work, struct qeth_card,
1376                                         kernel_thread_starter);
1377         QETH_CARD_TEXT(card , 2, "strthrd");
1378
1379         if (card->read.state != CH_STATE_UP &&
1380             card->write.state != CH_STATE_UP)
1381                 return;
1382         if (qeth_do_start_thread(card, QETH_RECOVER_THREAD)) {
1383                 ts = kthread_run(card->discipline->recover, (void *)card,
1384                                 "qeth_recover");
1385                 if (IS_ERR(ts)) {
1386                         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1387                         qeth_clear_thread_running_bit(card,
1388                                 QETH_RECOVER_THREAD);
1389                 }
1390         }
1391 }
1392
1393 static void qeth_buffer_reclaim_work(struct work_struct *);
1394 static void qeth_setup_card(struct qeth_card *card)
1395 {
1396         QETH_DBF_TEXT(SETUP, 2, "setupcrd");
1397         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1398
1399         card->info.type = CARD_RDEV(card)->id.driver_info;
1400         card->state = CARD_STATE_DOWN;
1401         spin_lock_init(&card->lock);
1402         spin_lock_init(&card->thread_mask_lock);
1403         mutex_init(&card->conf_mutex);
1404         mutex_init(&card->discipline_mutex);
1405         INIT_WORK(&card->kernel_thread_starter, qeth_start_kernel_thread);
1406         INIT_LIST_HEAD(&card->cmd_waiter_list);
1407         init_waitqueue_head(&card->wait_q);
1408         qeth_set_initial_options(card);
1409         /* IP address takeover */
1410         INIT_LIST_HEAD(&card->ipato.entries);
1411         qeth_init_qdio_info(card);
1412         INIT_DELAYED_WORK(&card->buffer_reclaim_work, qeth_buffer_reclaim_work);
1413         INIT_WORK(&card->close_dev_work, qeth_close_dev_handler);
1414 }
1415
1416 static void qeth_core_sl_print(struct seq_file *m, struct service_level *slr)
1417 {
1418         struct qeth_card *card = container_of(slr, struct qeth_card,
1419                                         qeth_service_level);
1420         if (card->info.mcl_level[0])
1421                 seq_printf(m, "qeth: %s firmware level %s\n",
1422                         CARD_BUS_ID(card), card->info.mcl_level);
1423 }
1424
1425 static struct qeth_card *qeth_alloc_card(struct ccwgroup_device *gdev)
1426 {
1427         struct qeth_card *card;
1428
1429         QETH_DBF_TEXT(SETUP, 2, "alloccrd");
1430         card = kzalloc(sizeof(*card), GFP_KERNEL);
1431         if (!card)
1432                 goto out;
1433         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1434
1435         card->gdev = gdev;
1436         dev_set_drvdata(&gdev->dev, card);
1437         CARD_RDEV(card) = gdev->cdev[0];
1438         CARD_WDEV(card) = gdev->cdev[1];
1439         CARD_DDEV(card) = gdev->cdev[2];
1440
1441         card->event_wq = alloc_ordered_workqueue("%s_event", 0,
1442                                                  dev_name(&gdev->dev));
1443         if (!card->event_wq)
1444                 goto out_wq;
1445         if (qeth_setup_channel(&card->read, true))
1446                 goto out_ip;
1447         if (qeth_setup_channel(&card->write, true))
1448                 goto out_channel;
1449         if (qeth_setup_channel(&card->data, false))
1450                 goto out_data;
1451         card->qeth_service_level.seq_print = qeth_core_sl_print;
1452         register_service_level(&card->qeth_service_level);
1453         return card;
1454
1455 out_data:
1456         qeth_clean_channel(&card->write);
1457 out_channel:
1458         qeth_clean_channel(&card->read);
1459 out_ip:
1460         destroy_workqueue(card->event_wq);
1461 out_wq:
1462         dev_set_drvdata(&gdev->dev, NULL);
1463         kfree(card);
1464 out:
1465         return NULL;
1466 }
1467
1468 static int qeth_clear_channel(struct qeth_card *card,
1469                               struct qeth_channel *channel)
1470 {
1471         int rc;
1472
1473         QETH_CARD_TEXT(card, 3, "clearch");
1474         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1475         rc = ccw_device_clear(channel->ccwdev, QETH_CLEAR_CHANNEL_PARM);
1476         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1477
1478         if (rc)
1479                 return rc;
1480         rc = wait_event_interruptible_timeout(card->wait_q,
1481                         channel->state == CH_STATE_STOPPED, QETH_TIMEOUT);
1482         if (rc == -ERESTARTSYS)
1483                 return rc;
1484         if (channel->state != CH_STATE_STOPPED)
1485                 return -ETIME;
1486         channel->state = CH_STATE_DOWN;
1487         return 0;
1488 }
1489
1490 static int qeth_halt_channel(struct qeth_card *card,
1491                              struct qeth_channel *channel)
1492 {
1493         int rc;
1494
1495         QETH_CARD_TEXT(card, 3, "haltch");
1496         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1497         rc = ccw_device_halt(channel->ccwdev, QETH_HALT_CHANNEL_PARM);
1498         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1499
1500         if (rc)
1501                 return rc;
1502         rc = wait_event_interruptible_timeout(card->wait_q,
1503                         channel->state == CH_STATE_HALTED, QETH_TIMEOUT);
1504         if (rc == -ERESTARTSYS)
1505                 return rc;
1506         if (channel->state != CH_STATE_HALTED)
1507                 return -ETIME;
1508         return 0;
1509 }
1510
1511 static int qeth_halt_channels(struct qeth_card *card)
1512 {
1513         int rc1 = 0, rc2 = 0, rc3 = 0;
1514
1515         QETH_CARD_TEXT(card, 3, "haltchs");
1516         rc1 = qeth_halt_channel(card, &card->read);
1517         rc2 = qeth_halt_channel(card, &card->write);
1518         rc3 = qeth_halt_channel(card, &card->data);
1519         if (rc1)
1520                 return rc1;
1521         if (rc2)
1522                 return rc2;
1523         return rc3;
1524 }
1525
1526 static int qeth_clear_channels(struct qeth_card *card)
1527 {
1528         int rc1 = 0, rc2 = 0, rc3 = 0;
1529
1530         QETH_CARD_TEXT(card, 3, "clearchs");
1531         rc1 = qeth_clear_channel(card, &card->read);
1532         rc2 = qeth_clear_channel(card, &card->write);
1533         rc3 = qeth_clear_channel(card, &card->data);
1534         if (rc1)
1535                 return rc1;
1536         if (rc2)
1537                 return rc2;
1538         return rc3;
1539 }
1540
1541 static int qeth_clear_halt_card(struct qeth_card *card, int halt)
1542 {
1543         int rc = 0;
1544
1545         QETH_CARD_TEXT(card, 3, "clhacrd");
1546
1547         if (halt)
1548                 rc = qeth_halt_channels(card);
1549         if (rc)
1550                 return rc;
1551         return qeth_clear_channels(card);
1552 }
1553
1554 int qeth_qdio_clear_card(struct qeth_card *card, int use_halt)
1555 {
1556         int rc = 0;
1557
1558         QETH_CARD_TEXT(card, 3, "qdioclr");
1559         switch (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ESTABLISHED,
1560                 QETH_QDIO_CLEANING)) {
1561         case QETH_QDIO_ESTABLISHED:
1562                 if (IS_IQD(card))
1563                         rc = qdio_shutdown(CARD_DDEV(card),
1564                                 QDIO_FLAG_CLEANUP_USING_HALT);
1565                 else
1566                         rc = qdio_shutdown(CARD_DDEV(card),
1567                                 QDIO_FLAG_CLEANUP_USING_CLEAR);
1568                 if (rc)
1569                         QETH_CARD_TEXT_(card, 3, "1err%d", rc);
1570                 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
1571                 break;
1572         case QETH_QDIO_CLEANING:
1573                 return rc;
1574         default:
1575                 break;
1576         }
1577         rc = qeth_clear_halt_card(card, use_halt);
1578         if (rc)
1579                 QETH_CARD_TEXT_(card, 3, "2err%d", rc);
1580         card->state = CARD_STATE_DOWN;
1581         return rc;
1582 }
1583 EXPORT_SYMBOL_GPL(qeth_qdio_clear_card);
1584
1585 static int qeth_read_conf_data(struct qeth_card *card, void **buffer,
1586                                int *length)
1587 {
1588         struct ciw *ciw;
1589         char *rcd_buf;
1590         int ret;
1591         struct qeth_channel *channel = &card->data;
1592
1593         /*
1594          * scan for RCD command in extended SenseID data
1595          */
1596         ciw = ccw_device_get_ciw(channel->ccwdev, CIW_TYPE_RCD);
1597         if (!ciw || ciw->cmd == 0)
1598                 return -EOPNOTSUPP;
1599         rcd_buf = kzalloc(ciw->count, GFP_KERNEL | GFP_DMA);
1600         if (!rcd_buf)
1601                 return -ENOMEM;
1602
1603         qeth_setup_ccw(channel->ccw, ciw->cmd, ciw->count, rcd_buf);
1604         channel->state = CH_STATE_RCD;
1605         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1606         ret = ccw_device_start_timeout(channel->ccwdev, channel->ccw,
1607                                        QETH_RCD_PARM, LPM_ANYPATH, 0,
1608                                        QETH_RCD_TIMEOUT);
1609         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1610         if (!ret)
1611                 wait_event(card->wait_q,
1612                            (channel->state == CH_STATE_RCD_DONE ||
1613                             channel->state == CH_STATE_DOWN));
1614         if (channel->state == CH_STATE_DOWN)
1615                 ret = -EIO;
1616         else
1617                 channel->state = CH_STATE_DOWN;
1618         if (ret) {
1619                 kfree(rcd_buf);
1620                 *buffer = NULL;
1621                 *length = 0;
1622         } else {
1623                 *length = ciw->count;
1624                 *buffer = rcd_buf;
1625         }
1626         return ret;
1627 }
1628
1629 static void qeth_configure_unitaddr(struct qeth_card *card, char *prcd)
1630 {
1631         QETH_DBF_TEXT(SETUP, 2, "cfgunit");
1632         card->info.chpid = prcd[30];
1633         card->info.unit_addr2 = prcd[31];
1634         card->info.cula = prcd[63];
1635         card->info.is_vm_nic = ((prcd[0x10] == _ascebc['V']) &&
1636                                 (prcd[0x11] == _ascebc['M']));
1637 }
1638
1639 static enum qeth_discipline_id qeth_vm_detect_layer(struct qeth_card *card)
1640 {
1641         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1642         struct diag26c_vnic_resp *response = NULL;
1643         struct diag26c_vnic_req *request = NULL;
1644         struct ccw_dev_id id;
1645         char userid[80];
1646         int rc = 0;
1647
1648         QETH_DBF_TEXT(SETUP, 2, "vmlayer");
1649
1650         cpcmd("QUERY USERID", userid, sizeof(userid), &rc);
1651         if (rc)
1652                 goto out;
1653
1654         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
1655         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
1656         if (!request || !response) {
1657                 rc = -ENOMEM;
1658                 goto out;
1659         }
1660
1661         ccw_device_get_id(CARD_RDEV(card), &id);
1662         request->resp_buf_len = sizeof(*response);
1663         request->resp_version = DIAG26C_VERSION6_VM65918;
1664         request->req_format = DIAG26C_VNIC_INFO;
1665         ASCEBC(userid, 8);
1666         memcpy(&request->sys_name, userid, 8);
1667         request->devno = id.devno;
1668
1669         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1670         rc = diag26c(request, response, DIAG26C_PORT_VNIC);
1671         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1672         if (rc)
1673                 goto out;
1674         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
1675
1676         if (request->resp_buf_len < sizeof(*response) ||
1677             response->version != request->resp_version) {
1678                 rc = -EIO;
1679                 goto out;
1680         }
1681
1682         if (response->protocol == VNIC_INFO_PROT_L2)
1683                 disc = QETH_DISCIPLINE_LAYER2;
1684         else if (response->protocol == VNIC_INFO_PROT_L3)
1685                 disc = QETH_DISCIPLINE_LAYER3;
1686
1687 out:
1688         kfree(response);
1689         kfree(request);
1690         if (rc)
1691                 QETH_DBF_TEXT_(SETUP, 2, "err%x", rc);
1692         return disc;
1693 }
1694
1695 /* Determine whether the device requires a specific layer discipline */
1696 static enum qeth_discipline_id qeth_enforce_discipline(struct qeth_card *card)
1697 {
1698         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1699
1700         if (IS_OSM(card) || IS_OSN(card))
1701                 disc = QETH_DISCIPLINE_LAYER2;
1702         else if (IS_VM_NIC(card))
1703                 disc = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
1704                                       qeth_vm_detect_layer(card);
1705
1706         switch (disc) {
1707         case QETH_DISCIPLINE_LAYER2:
1708                 QETH_DBF_TEXT(SETUP, 3, "force l2");
1709                 break;
1710         case QETH_DISCIPLINE_LAYER3:
1711                 QETH_DBF_TEXT(SETUP, 3, "force l3");
1712                 break;
1713         default:
1714                 QETH_DBF_TEXT(SETUP, 3, "force no");
1715         }
1716
1717         return disc;
1718 }
1719
1720 static void qeth_configure_blkt_default(struct qeth_card *card, char *prcd)
1721 {
1722         QETH_DBF_TEXT(SETUP, 2, "cfgblkt");
1723
1724         if (prcd[74] == 0xF0 && prcd[75] == 0xF0 &&
1725             prcd[76] >= 0xF1 && prcd[76] <= 0xF4) {
1726                 card->info.blkt.time_total = 0;
1727                 card->info.blkt.inter_packet = 0;
1728                 card->info.blkt.inter_packet_jumbo = 0;
1729         } else {
1730                 card->info.blkt.time_total = 250;
1731                 card->info.blkt.inter_packet = 5;
1732                 card->info.blkt.inter_packet_jumbo = 15;
1733         }
1734 }
1735
1736 static void qeth_init_tokens(struct qeth_card *card)
1737 {
1738         card->token.issuer_rm_w = 0x00010103UL;
1739         card->token.cm_filter_w = 0x00010108UL;
1740         card->token.cm_connection_w = 0x0001010aUL;
1741         card->token.ulp_filter_w = 0x0001010bUL;
1742         card->token.ulp_connection_w = 0x0001010dUL;
1743 }
1744
1745 static void qeth_init_func_level(struct qeth_card *card)
1746 {
1747         switch (card->info.type) {
1748         case QETH_CARD_TYPE_IQD:
1749                 card->info.func_level = QETH_IDX_FUNC_LEVEL_IQD;
1750                 break;
1751         case QETH_CARD_TYPE_OSD:
1752         case QETH_CARD_TYPE_OSN:
1753                 card->info.func_level = QETH_IDX_FUNC_LEVEL_OSD;
1754                 break;
1755         default:
1756                 break;
1757         }
1758 }
1759
1760 static void qeth_idx_finalize_cmd(struct qeth_card *card,
1761                                   struct qeth_cmd_buffer *iob,
1762                                   unsigned int length)
1763 {
1764         qeth_setup_ccw(iob->channel->ccw, CCW_CMD_WRITE, length, iob->data);
1765
1766         memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data), &card->seqno.trans_hdr,
1767                QETH_SEQ_NO_LENGTH);
1768         if (iob->channel == &card->write)
1769                 card->seqno.trans_hdr++;
1770 }
1771
1772 static int qeth_peer_func_level(int level)
1773 {
1774         if ((level & 0xff) == 8)
1775                 return (level & 0xff) + 0x400;
1776         if (((level >> 8) & 3) == 1)
1777                 return (level & 0xff) + 0x200;
1778         return level;
1779 }
1780
1781 static void qeth_mpc_finalize_cmd(struct qeth_card *card,
1782                                   struct qeth_cmd_buffer *iob,
1783                                   unsigned int length)
1784 {
1785         qeth_idx_finalize_cmd(card, iob, length);
1786
1787         memcpy(QETH_PDU_HEADER_SEQ_NO(iob->data),
1788                &card->seqno.pdu_hdr, QETH_SEQ_NO_LENGTH);
1789         card->seqno.pdu_hdr++;
1790         memcpy(QETH_PDU_HEADER_ACK_SEQ_NO(iob->data),
1791                &card->seqno.pdu_hdr_ack, QETH_SEQ_NO_LENGTH);
1792
1793         iob->reply->seqno = QETH_IDX_COMMAND_SEQNO;
1794         iob->callback = qeth_release_buffer_cb;
1795 }
1796
1797 /**
1798  * qeth_send_control_data() -   send control command to the card
1799  * @card:                       qeth_card structure pointer
1800  * @len:                        size of the command buffer
1801  * @iob:                        qeth_cmd_buffer pointer
1802  * @reply_cb:                   callback function pointer
1803  * @cb_card:                    pointer to the qeth_card structure
1804  * @cb_reply:                   pointer to the qeth_reply structure
1805  * @cb_cmd:                     pointer to the original iob for non-IPA
1806  *                              commands, or to the qeth_ipa_cmd structure
1807  *                              for the IPA commands.
1808  * @reply_param:                private pointer passed to the callback
1809  *
1810  * Callback function gets called one or more times, with cb_cmd
1811  * pointing to the response returned by the hardware. Callback
1812  * function must return
1813  *   > 0 if more reply blocks are expected,
1814  *     0 if the last or only reply block is received, and
1815  *   < 0 on error.
1816  * Callback function can get the value of the reply_param pointer from the
1817  * field 'param' of the structure qeth_reply.
1818  */
1819
1820 static int qeth_send_control_data(struct qeth_card *card, int len,
1821                                   struct qeth_cmd_buffer *iob,
1822                                   int (*reply_cb)(struct qeth_card *cb_card,
1823                                                   struct qeth_reply *cb_reply,
1824                                                   unsigned long cb_cmd),
1825                                   void *reply_param)
1826 {
1827         struct qeth_channel *channel = iob->channel;
1828         long timeout = iob->timeout;
1829         int rc;
1830         struct qeth_reply *reply = NULL;
1831
1832         QETH_CARD_TEXT(card, 2, "sendctl");
1833
1834         reply = qeth_alloc_reply(card);
1835         if (!reply) {
1836                 qeth_release_buffer(channel, iob);
1837                 return -ENOMEM;
1838         }
1839         reply->callback = reply_cb;
1840         reply->param = reply_param;
1841
1842         /* pairs with qeth_release_buffer(): */
1843         qeth_get_reply(reply);
1844         iob->reply = reply;
1845
1846         timeout = wait_event_interruptible_timeout(card->wait_q,
1847                                                    qeth_trylock_channel(channel),
1848                                                    timeout);
1849         if (timeout <= 0) {
1850                 qeth_put_reply(reply);
1851                 qeth_release_buffer(channel, iob);
1852                 return (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
1853         }
1854
1855         iob->finalize(card, iob, len);
1856         QETH_DBF_HEX(CTRL, 2, iob->data, min(len, QETH_DBF_CTRL_LEN));
1857
1858         qeth_enqueue_reply(card, reply);
1859
1860         QETH_CARD_TEXT(card, 6, "noirqpnd");
1861         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1862         rc = ccw_device_start_timeout(channel->ccwdev, channel->ccw,
1863                                       (addr_t) iob, 0, 0, timeout);
1864         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1865         if (rc) {
1866                 QETH_DBF_MESSAGE(2, "qeth_send_control_data on device %x: ccw_device_start rc = %i\n",
1867                                  CARD_DEVID(card), rc);
1868                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
1869                 qeth_dequeue_reply(card, reply);
1870                 qeth_put_reply(reply);
1871                 qeth_release_buffer(channel, iob);
1872                 atomic_set(&channel->irq_pending, 0);
1873                 wake_up(&card->wait_q);
1874                 return rc;
1875         }
1876
1877         timeout = wait_for_completion_interruptible_timeout(&reply->received,
1878                                                             timeout);
1879         if (timeout <= 0)
1880                 rc = (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
1881
1882         qeth_dequeue_reply(card, reply);
1883         if (!rc)
1884                 rc = reply->rc;
1885         qeth_put_reply(reply);
1886         return rc;
1887 }
1888
1889 static int qeth_idx_check_activate_response(struct qeth_card *card,
1890                                             struct qeth_channel *channel,
1891                                             struct qeth_cmd_buffer *iob)
1892 {
1893         int rc;
1894
1895         rc = qeth_check_idx_response(card, iob->data);
1896         if (rc)
1897                 return rc;
1898
1899         if (QETH_IS_IDX_ACT_POS_REPLY(iob->data))
1900                 return 0;
1901
1902         /* negative reply: */
1903         QETH_DBF_TEXT_(SETUP, 2, "idxneg%c",
1904                        QETH_IDX_ACT_CAUSE_CODE(iob->data));
1905
1906         switch (QETH_IDX_ACT_CAUSE_CODE(iob->data)) {
1907         case QETH_IDX_ACT_ERR_EXCL:
1908                 dev_err(&channel->ccwdev->dev,
1909                         "The adapter is used exclusively by another host\n");
1910                 return -EBUSY;
1911         case QETH_IDX_ACT_ERR_AUTH:
1912         case QETH_IDX_ACT_ERR_AUTH_USER:
1913                 dev_err(&channel->ccwdev->dev,
1914                         "Setting the device online failed because of insufficient authorization\n");
1915                 return -EPERM;
1916         default:
1917                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: negative reply\n",
1918                                  CCW_DEVID(channel->ccwdev));
1919                 return -EIO;
1920         }
1921 }
1922
1923 static void qeth_idx_query_read_cb(struct qeth_card *card,
1924                                    struct qeth_channel *channel,
1925                                    struct qeth_cmd_buffer *iob)
1926 {
1927         u16 peer_level;
1928         int rc;
1929
1930         QETH_DBF_TEXT(SETUP, 2, "idxrdcb");
1931
1932         rc = qeth_idx_check_activate_response(card, channel, iob);
1933         if (rc)
1934                 goto out;
1935
1936         memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
1937         if (peer_level != qeth_peer_func_level(card->info.func_level)) {
1938                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
1939                                  CCW_DEVID(channel->ccwdev),
1940                                  card->info.func_level, peer_level);
1941                 rc = -EINVAL;
1942                 goto out;
1943         }
1944
1945         memcpy(&card->token.issuer_rm_r,
1946                QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
1947                QETH_MPC_TOKEN_LENGTH);
1948         memcpy(&card->info.mcl_level[0],
1949                QETH_IDX_REPLY_LEVEL(iob->data), QETH_MCL_LENGTH);
1950
1951 out:
1952         qeth_notify_reply(iob->reply, rc);
1953         qeth_release_buffer(channel, iob);
1954 }
1955
1956 static void qeth_idx_query_write_cb(struct qeth_card *card,
1957                                     struct qeth_channel *channel,
1958                                     struct qeth_cmd_buffer *iob)
1959 {
1960         u16 peer_level;
1961         int rc;
1962
1963         QETH_DBF_TEXT(SETUP, 2, "idxwrcb");
1964
1965         rc = qeth_idx_check_activate_response(card, channel, iob);
1966         if (rc)
1967                 goto out;
1968
1969         memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
1970         if ((peer_level & ~0x0100) !=
1971             qeth_peer_func_level(card->info.func_level)) {
1972                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
1973                                  CCW_DEVID(channel->ccwdev),
1974                                  card->info.func_level, peer_level);
1975                 rc = -EINVAL;
1976         }
1977
1978 out:
1979         qeth_notify_reply(iob->reply, rc);
1980         qeth_release_buffer(channel, iob);
1981 }
1982
1983 static void qeth_idx_finalize_query_cmd(struct qeth_card *card,
1984                                         struct qeth_cmd_buffer *iob,
1985                                         unsigned int length)
1986 {
1987         qeth_setup_ccw(iob->channel->ccw, CCW_CMD_READ, length, iob->data);
1988 }
1989
1990 static void qeth_idx_activate_cb(struct qeth_card *card,
1991                                  struct qeth_channel *channel,
1992                                  struct qeth_cmd_buffer *iob)
1993 {
1994         qeth_notify_reply(iob->reply, 0);
1995         qeth_release_buffer(channel, iob);
1996 }
1997
1998 static void qeth_idx_setup_activate_cmd(struct qeth_card *card,
1999                                         struct qeth_cmd_buffer *iob)
2000 {
2001         u16 addr = (card->info.cula << 8) + card->info.unit_addr2;
2002         u8 port = ((u8)card->dev->dev_port) | 0x80;
2003         struct ccw_dev_id dev_id;
2004
2005         ccw_device_get_id(CARD_DDEV(card), &dev_id);
2006         iob->finalize = qeth_idx_finalize_cmd;
2007         iob->callback = qeth_idx_activate_cb;
2008
2009         memcpy(QETH_IDX_ACT_PNO(iob->data), &port, 1);
2010         memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2011                &card->token.issuer_rm_w, QETH_MPC_TOKEN_LENGTH);
2012         memcpy(QETH_IDX_ACT_FUNC_LEVEL(iob->data),
2013                &card->info.func_level, 2);
2014         memcpy(QETH_IDX_ACT_QDIO_DEV_CUA(iob->data), &dev_id.devno, 2);
2015         memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &addr, 2);
2016 }
2017
2018 static int qeth_idx_activate_read_channel(struct qeth_card *card)
2019 {
2020         struct qeth_channel *channel = &card->read;
2021         struct qeth_cmd_buffer *iob;
2022         int rc;
2023
2024         QETH_DBF_TEXT(SETUP, 2, "idxread");
2025
2026         iob = qeth_get_buffer(channel);
2027         if (!iob)
2028                 return -ENOMEM;
2029
2030         memcpy(iob->data, IDX_ACTIVATE_READ, IDX_ACTIVATE_SIZE);
2031         qeth_idx_setup_activate_cmd(card, iob);
2032
2033         rc = qeth_send_control_data(card, IDX_ACTIVATE_SIZE, iob, NULL, NULL);
2034         if (rc)
2035                 return rc;
2036
2037         iob = qeth_get_buffer(channel);
2038         if (!iob)
2039                 return -ENOMEM;
2040
2041         iob->finalize = qeth_idx_finalize_query_cmd;
2042         iob->callback = qeth_idx_query_read_cb;
2043         rc = qeth_send_control_data(card, QETH_BUFSIZE, iob, NULL, NULL);
2044         if (rc)
2045                 return rc;
2046
2047         channel->state = CH_STATE_UP;
2048         return 0;
2049 }
2050
2051 static int qeth_idx_activate_write_channel(struct qeth_card *card)
2052 {
2053         struct qeth_channel *channel = &card->write;
2054         struct qeth_cmd_buffer *iob;
2055         int rc;
2056
2057         QETH_DBF_TEXT(SETUP, 2, "idxwrite");
2058
2059         iob = qeth_get_buffer(channel);
2060         if (!iob)
2061                 return -ENOMEM;
2062
2063         memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE);
2064         qeth_idx_setup_activate_cmd(card, iob);
2065
2066         rc = qeth_send_control_data(card, IDX_ACTIVATE_SIZE, iob, NULL, NULL);
2067         if (rc)
2068                 return rc;
2069
2070         iob = qeth_get_buffer(channel);
2071         if (!iob)
2072                 return -ENOMEM;
2073
2074         iob->finalize = qeth_idx_finalize_query_cmd;
2075         iob->callback = qeth_idx_query_write_cb;
2076         rc = qeth_send_control_data(card, QETH_BUFSIZE, iob, NULL, NULL);
2077         if (rc)
2078                 return rc;
2079
2080         channel->state = CH_STATE_UP;
2081         return 0;
2082 }
2083
2084 static int qeth_cm_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2085                 unsigned long data)
2086 {
2087         struct qeth_cmd_buffer *iob;
2088
2089         QETH_DBF_TEXT(SETUP, 2, "cmenblcb");
2090
2091         iob = (struct qeth_cmd_buffer *) data;
2092         memcpy(&card->token.cm_filter_r,
2093                QETH_CM_ENABLE_RESP_FILTER_TOKEN(iob->data),
2094                QETH_MPC_TOKEN_LENGTH);
2095         return 0;
2096 }
2097
2098 static int qeth_cm_enable(struct qeth_card *card)
2099 {
2100         int rc;
2101         struct qeth_cmd_buffer *iob;
2102
2103         QETH_DBF_TEXT(SETUP, 2, "cmenable");
2104
2105         iob = qeth_wait_for_buffer(&card->write);
2106         iob->finalize = qeth_mpc_finalize_cmd;
2107         memcpy(iob->data, CM_ENABLE, CM_ENABLE_SIZE);
2108
2109         memcpy(QETH_CM_ENABLE_ISSUER_RM_TOKEN(iob->data),
2110                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2111         memcpy(QETH_CM_ENABLE_FILTER_TOKEN(iob->data),
2112                &card->token.cm_filter_w, QETH_MPC_TOKEN_LENGTH);
2113
2114         rc = qeth_send_control_data(card, CM_ENABLE_SIZE, iob,
2115                                     qeth_cm_enable_cb, NULL);
2116         return rc;
2117 }
2118
2119 static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2120                 unsigned long data)
2121 {
2122         struct qeth_cmd_buffer *iob;
2123
2124         QETH_DBF_TEXT(SETUP, 2, "cmsetpcb");
2125
2126         iob = (struct qeth_cmd_buffer *) data;
2127         memcpy(&card->token.cm_connection_r,
2128                QETH_CM_SETUP_RESP_DEST_ADDR(iob->data),
2129                QETH_MPC_TOKEN_LENGTH);
2130         return 0;
2131 }
2132
2133 static int qeth_cm_setup(struct qeth_card *card)
2134 {
2135         int rc;
2136         struct qeth_cmd_buffer *iob;
2137
2138         QETH_DBF_TEXT(SETUP, 2, "cmsetup");
2139
2140         iob = qeth_wait_for_buffer(&card->write);
2141         iob->finalize = qeth_mpc_finalize_cmd;
2142         memcpy(iob->data, CM_SETUP, CM_SETUP_SIZE);
2143
2144         memcpy(QETH_CM_SETUP_DEST_ADDR(iob->data),
2145                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2146         memcpy(QETH_CM_SETUP_CONNECTION_TOKEN(iob->data),
2147                &card->token.cm_connection_w, QETH_MPC_TOKEN_LENGTH);
2148         memcpy(QETH_CM_SETUP_FILTER_TOKEN(iob->data),
2149                &card->token.cm_filter_r, QETH_MPC_TOKEN_LENGTH);
2150         rc = qeth_send_control_data(card, CM_SETUP_SIZE, iob,
2151                                     qeth_cm_setup_cb, NULL);
2152         return rc;
2153 }
2154
2155 static int qeth_update_max_mtu(struct qeth_card *card, unsigned int max_mtu)
2156 {
2157         struct net_device *dev = card->dev;
2158         unsigned int new_mtu;
2159
2160         if (!max_mtu) {
2161                 /* IQD needs accurate max MTU to set up its RX buffers: */
2162                 if (IS_IQD(card))
2163                         return -EINVAL;
2164                 /* tolerate quirky HW: */
2165                 max_mtu = ETH_MAX_MTU;
2166         }
2167
2168         rtnl_lock();
2169         if (IS_IQD(card)) {
2170                 /* move any device with default MTU to new max MTU: */
2171                 new_mtu = (dev->mtu == dev->max_mtu) ? max_mtu : dev->mtu;
2172
2173                 /* adjust RX buffer size to new max MTU: */
2174                 card->qdio.in_buf_size = max_mtu + 2 * PAGE_SIZE;
2175                 if (dev->max_mtu && dev->max_mtu != max_mtu)
2176                         qeth_free_qdio_queues(card);
2177         } else {
2178                 if (dev->mtu)
2179                         new_mtu = dev->mtu;
2180                 /* default MTUs for first setup: */
2181                 else if (IS_LAYER2(card))
2182                         new_mtu = ETH_DATA_LEN;
2183                 else
2184                         new_mtu = ETH_DATA_LEN - 8; /* allow for LLC + SNAP */
2185         }
2186
2187         dev->max_mtu = max_mtu;
2188         dev->mtu = min(new_mtu, max_mtu);
2189         rtnl_unlock();
2190         return 0;
2191 }
2192
2193 static int qeth_get_mtu_outof_framesize(int framesize)
2194 {
2195         switch (framesize) {
2196         case 0x4000:
2197                 return 8192;
2198         case 0x6000:
2199                 return 16384;
2200         case 0xa000:
2201                 return 32768;
2202         case 0xffff:
2203                 return 57344;
2204         default:
2205                 return 0;
2206         }
2207 }
2208
2209 static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2210                 unsigned long data)
2211 {
2212         __u16 mtu, framesize;
2213         __u16 len;
2214         __u8 link_type;
2215         struct qeth_cmd_buffer *iob;
2216
2217         QETH_DBF_TEXT(SETUP, 2, "ulpenacb");
2218
2219         iob = (struct qeth_cmd_buffer *) data;
2220         memcpy(&card->token.ulp_filter_r,
2221                QETH_ULP_ENABLE_RESP_FILTER_TOKEN(iob->data),
2222                QETH_MPC_TOKEN_LENGTH);
2223         if (IS_IQD(card)) {
2224                 memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2);
2225                 mtu = qeth_get_mtu_outof_framesize(framesize);
2226         } else {
2227                 mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data);
2228         }
2229         *(u16 *)reply->param = mtu;
2230
2231         memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2);
2232         if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) {
2233                 memcpy(&link_type,
2234                        QETH_ULP_ENABLE_RESP_LINK_TYPE(iob->data), 1);
2235                 card->info.link_type = link_type;
2236         } else
2237                 card->info.link_type = 0;
2238         QETH_DBF_TEXT_(SETUP, 2, "link%d", card->info.link_type);
2239         return 0;
2240 }
2241
2242 static u8 qeth_mpc_select_prot_type(struct qeth_card *card)
2243 {
2244         if (IS_OSN(card))
2245                 return QETH_PROT_OSN2;
2246         return IS_LAYER2(card) ? QETH_PROT_LAYER2 : QETH_PROT_TCPIP;
2247 }
2248
2249 static int qeth_ulp_enable(struct qeth_card *card)
2250 {
2251         u8 prot_type = qeth_mpc_select_prot_type(card);
2252         struct qeth_cmd_buffer *iob;
2253         u16 max_mtu;
2254         int rc;
2255
2256         /*FIXME: trace view callbacks*/
2257         QETH_DBF_TEXT(SETUP, 2, "ulpenabl");
2258
2259         iob = qeth_wait_for_buffer(&card->write);
2260         iob->finalize = qeth_mpc_finalize_cmd;
2261         memcpy(iob->data, ULP_ENABLE, ULP_ENABLE_SIZE);
2262
2263         *(QETH_ULP_ENABLE_LINKNUM(iob->data)) = (u8) card->dev->dev_port;
2264         memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1);
2265         memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data),
2266                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2267         memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data),
2268                &card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH);
2269         rc = qeth_send_control_data(card, ULP_ENABLE_SIZE, iob,
2270                                     qeth_ulp_enable_cb, &max_mtu);
2271         if (rc)
2272                 return rc;
2273         return qeth_update_max_mtu(card, max_mtu);
2274 }
2275
2276 static int qeth_ulp_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2277                 unsigned long data)
2278 {
2279         struct qeth_cmd_buffer *iob;
2280
2281         QETH_DBF_TEXT(SETUP, 2, "ulpstpcb");
2282
2283         iob = (struct qeth_cmd_buffer *) data;
2284         memcpy(&card->token.ulp_connection_r,
2285                QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2286                QETH_MPC_TOKEN_LENGTH);
2287         if (!strncmp("00S", QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2288                      3)) {
2289                 QETH_DBF_TEXT(SETUP, 2, "olmlimit");
2290                 dev_err(&card->gdev->dev, "A connection could not be "
2291                         "established because of an OLM limit\n");
2292                 return -EMLINK;
2293         }
2294         return 0;
2295 }
2296
2297 static int qeth_ulp_setup(struct qeth_card *card)
2298 {
2299         int rc;
2300         __u16 temp;
2301         struct qeth_cmd_buffer *iob;
2302         struct ccw_dev_id dev_id;
2303
2304         QETH_DBF_TEXT(SETUP, 2, "ulpsetup");
2305
2306         iob = qeth_wait_for_buffer(&card->write);
2307         iob->finalize = qeth_mpc_finalize_cmd;
2308         memcpy(iob->data, ULP_SETUP, ULP_SETUP_SIZE);
2309
2310         memcpy(QETH_ULP_SETUP_DEST_ADDR(iob->data),
2311                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2312         memcpy(QETH_ULP_SETUP_CONNECTION_TOKEN(iob->data),
2313                &card->token.ulp_connection_w, QETH_MPC_TOKEN_LENGTH);
2314         memcpy(QETH_ULP_SETUP_FILTER_TOKEN(iob->data),
2315                &card->token.ulp_filter_r, QETH_MPC_TOKEN_LENGTH);
2316
2317         ccw_device_get_id(CARD_DDEV(card), &dev_id);
2318         memcpy(QETH_ULP_SETUP_CUA(iob->data), &dev_id.devno, 2);
2319         temp = (card->info.cula << 8) + card->info.unit_addr2;
2320         memcpy(QETH_ULP_SETUP_REAL_DEVADDR(iob->data), &temp, 2);
2321         rc = qeth_send_control_data(card, ULP_SETUP_SIZE, iob,
2322                                     qeth_ulp_setup_cb, NULL);
2323         return rc;
2324 }
2325
2326 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *q, int bidx)
2327 {
2328         struct qeth_qdio_out_buffer *newbuf;
2329
2330         newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, GFP_ATOMIC);
2331         if (!newbuf)
2332                 return -ENOMEM;
2333
2334         newbuf->buffer = q->qdio_bufs[bidx];
2335         skb_queue_head_init(&newbuf->skb_list);
2336         lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key);
2337         newbuf->q = q;
2338         newbuf->next_pending = q->bufs[bidx];
2339         atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY);
2340         q->bufs[bidx] = newbuf;
2341         return 0;
2342 }
2343
2344 static void qeth_free_output_queue(struct qeth_qdio_out_q *q)
2345 {
2346         if (!q)
2347                 return;
2348
2349         qeth_drain_output_queue(q, true);
2350         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2351         kfree(q);
2352 }
2353
2354 static struct qeth_qdio_out_q *qeth_alloc_output_queue(void)
2355 {
2356         struct qeth_qdio_out_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
2357
2358         if (!q)
2359                 return NULL;
2360
2361         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
2362                 kfree(q);
2363                 return NULL;
2364         }
2365         return q;
2366 }
2367
2368 static int qeth_alloc_qdio_queues(struct qeth_card *card)
2369 {
2370         int i, j;
2371
2372         QETH_DBF_TEXT(SETUP, 2, "allcqdbf");
2373
2374         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED,
2375                 QETH_QDIO_ALLOCATED) != QETH_QDIO_UNINITIALIZED)
2376                 return 0;
2377
2378         QETH_DBF_TEXT(SETUP, 2, "inq");
2379         card->qdio.in_q = qeth_alloc_qdio_queue();
2380         if (!card->qdio.in_q)
2381                 goto out_nomem;
2382
2383         /* inbound buffer pool */
2384         if (qeth_alloc_buffer_pool(card))
2385                 goto out_freeinq;
2386
2387         /* outbound */
2388         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2389                 card->qdio.out_qs[i] = qeth_alloc_output_queue();
2390                 if (!card->qdio.out_qs[i])
2391                         goto out_freeoutq;
2392                 QETH_DBF_TEXT_(SETUP, 2, "outq %i", i);
2393                 QETH_DBF_HEX(SETUP, 2, &card->qdio.out_qs[i], sizeof(void *));
2394                 card->qdio.out_qs[i]->card = card;
2395                 card->qdio.out_qs[i]->queue_no = i;
2396                 /* give outbound qeth_qdio_buffers their qdio_buffers */
2397                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2398                         WARN_ON(card->qdio.out_qs[i]->bufs[j] != NULL);
2399                         if (qeth_init_qdio_out_buf(card->qdio.out_qs[i], j))
2400                                 goto out_freeoutqbufs;
2401                 }
2402         }
2403
2404         /* completion */
2405         if (qeth_alloc_cq(card))
2406                 goto out_freeoutq;
2407
2408         return 0;
2409
2410 out_freeoutqbufs:
2411         while (j > 0) {
2412                 --j;
2413                 kmem_cache_free(qeth_qdio_outbuf_cache,
2414                                 card->qdio.out_qs[i]->bufs[j]);
2415                 card->qdio.out_qs[i]->bufs[j] = NULL;
2416         }
2417 out_freeoutq:
2418         while (i > 0) {
2419                 qeth_free_output_queue(card->qdio.out_qs[--i]);
2420                 card->qdio.out_qs[i] = NULL;
2421         }
2422         qeth_free_buffer_pool(card);
2423 out_freeinq:
2424         qeth_free_qdio_queue(card->qdio.in_q);
2425         card->qdio.in_q = NULL;
2426 out_nomem:
2427         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
2428         return -ENOMEM;
2429 }
2430
2431 static void qeth_free_qdio_queues(struct qeth_card *card)
2432 {
2433         int i, j;
2434
2435         if (atomic_xchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED) ==
2436                 QETH_QDIO_UNINITIALIZED)
2437                 return;
2438
2439         qeth_free_cq(card);
2440         cancel_delayed_work_sync(&card->buffer_reclaim_work);
2441         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2442                 if (card->qdio.in_q->bufs[j].rx_skb)
2443                         dev_kfree_skb_any(card->qdio.in_q->bufs[j].rx_skb);
2444         }
2445         qeth_free_qdio_queue(card->qdio.in_q);
2446         card->qdio.in_q = NULL;
2447         /* inbound buffer pool */
2448         qeth_free_buffer_pool(card);
2449         /* free outbound qdio_qs */
2450         for (i = 0; i < card->qdio.no_out_queues; i++) {
2451                 qeth_free_output_queue(card->qdio.out_qs[i]);
2452                 card->qdio.out_qs[i] = NULL;
2453         }
2454 }
2455
2456 static void qeth_create_qib_param_field(struct qeth_card *card,
2457                 char *param_field)
2458 {
2459
2460         param_field[0] = _ascebc['P'];
2461         param_field[1] = _ascebc['C'];
2462         param_field[2] = _ascebc['I'];
2463         param_field[3] = _ascebc['T'];
2464         *((unsigned int *) (&param_field[4])) = QETH_PCI_THRESHOLD_A(card);
2465         *((unsigned int *) (&param_field[8])) = QETH_PCI_THRESHOLD_B(card);
2466         *((unsigned int *) (&param_field[12])) = QETH_PCI_TIMER_VALUE(card);
2467 }
2468
2469 static void qeth_create_qib_param_field_blkt(struct qeth_card *card,
2470                 char *param_field)
2471 {
2472         param_field[16] = _ascebc['B'];
2473         param_field[17] = _ascebc['L'];
2474         param_field[18] = _ascebc['K'];
2475         param_field[19] = _ascebc['T'];
2476         *((unsigned int *) (&param_field[20])) = card->info.blkt.time_total;
2477         *((unsigned int *) (&param_field[24])) = card->info.blkt.inter_packet;
2478         *((unsigned int *) (&param_field[28])) =
2479                 card->info.blkt.inter_packet_jumbo;
2480 }
2481
2482 static int qeth_qdio_activate(struct qeth_card *card)
2483 {
2484         QETH_DBF_TEXT(SETUP, 3, "qdioact");
2485         return qdio_activate(CARD_DDEV(card));
2486 }
2487
2488 static int qeth_dm_act(struct qeth_card *card)
2489 {
2490         int rc;
2491         struct qeth_cmd_buffer *iob;
2492
2493         QETH_DBF_TEXT(SETUP, 2, "dmact");
2494
2495         iob = qeth_wait_for_buffer(&card->write);
2496         iob->finalize = qeth_mpc_finalize_cmd;
2497         memcpy(iob->data, DM_ACT, DM_ACT_SIZE);
2498
2499         memcpy(QETH_DM_ACT_DEST_ADDR(iob->data),
2500                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2501         memcpy(QETH_DM_ACT_CONNECTION_TOKEN(iob->data),
2502                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2503         rc = qeth_send_control_data(card, DM_ACT_SIZE, iob, NULL, NULL);
2504         return rc;
2505 }
2506
2507 static int qeth_mpc_initialize(struct qeth_card *card)
2508 {
2509         int rc;
2510
2511         QETH_DBF_TEXT(SETUP, 2, "mpcinit");
2512
2513         rc = qeth_issue_next_read(card);
2514         if (rc) {
2515                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
2516                 return rc;
2517         }
2518         rc = qeth_cm_enable(card);
2519         if (rc) {
2520                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
2521                 goto out_qdio;
2522         }
2523         rc = qeth_cm_setup(card);
2524         if (rc) {
2525                 QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
2526                 goto out_qdio;
2527         }
2528         rc = qeth_ulp_enable(card);
2529         if (rc) {
2530                 QETH_DBF_TEXT_(SETUP, 2, "4err%d", rc);
2531                 goto out_qdio;
2532         }
2533         rc = qeth_ulp_setup(card);
2534         if (rc) {
2535                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
2536                 goto out_qdio;
2537         }
2538         rc = qeth_alloc_qdio_queues(card);
2539         if (rc) {
2540                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
2541                 goto out_qdio;
2542         }
2543         rc = qeth_qdio_establish(card);
2544         if (rc) {
2545                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
2546                 qeth_free_qdio_queues(card);
2547                 goto out_qdio;
2548         }
2549         rc = qeth_qdio_activate(card);
2550         if (rc) {
2551                 QETH_DBF_TEXT_(SETUP, 2, "7err%d", rc);
2552                 goto out_qdio;
2553         }
2554         rc = qeth_dm_act(card);
2555         if (rc) {
2556                 QETH_DBF_TEXT_(SETUP, 2, "8err%d", rc);
2557                 goto out_qdio;
2558         }
2559
2560         return 0;
2561 out_qdio:
2562         qeth_qdio_clear_card(card, !IS_IQD(card));
2563         qdio_free(CARD_DDEV(card));
2564         return rc;
2565 }
2566
2567 void qeth_print_status_message(struct qeth_card *card)
2568 {
2569         switch (card->info.type) {
2570         case QETH_CARD_TYPE_OSD:
2571         case QETH_CARD_TYPE_OSM:
2572         case QETH_CARD_TYPE_OSX:
2573                 /* VM will use a non-zero first character
2574                  * to indicate a HiperSockets like reporting
2575                  * of the level OSA sets the first character to zero
2576                  * */
2577                 if (!card->info.mcl_level[0]) {
2578                         sprintf(card->info.mcl_level, "%02x%02x",
2579                                 card->info.mcl_level[2],
2580                                 card->info.mcl_level[3]);
2581                         break;
2582                 }
2583                 /* fallthrough */
2584         case QETH_CARD_TYPE_IQD:
2585                 if (IS_VM_NIC(card) || (card->info.mcl_level[0] & 0x80)) {
2586                         card->info.mcl_level[0] = (char) _ebcasc[(__u8)
2587                                 card->info.mcl_level[0]];
2588                         card->info.mcl_level[1] = (char) _ebcasc[(__u8)
2589                                 card->info.mcl_level[1]];
2590                         card->info.mcl_level[2] = (char) _ebcasc[(__u8)
2591                                 card->info.mcl_level[2]];
2592                         card->info.mcl_level[3] = (char) _ebcasc[(__u8)
2593                                 card->info.mcl_level[3]];
2594                         card->info.mcl_level[QETH_MCL_LENGTH] = 0;
2595                 }
2596                 break;
2597         default:
2598                 memset(&card->info.mcl_level[0], 0, QETH_MCL_LENGTH + 1);
2599         }
2600         dev_info(&card->gdev->dev,
2601                  "Device is a%s card%s%s%s\nwith link type %s.\n",
2602                  qeth_get_cardname(card),
2603                  (card->info.mcl_level[0]) ? " (level: " : "",
2604                  (card->info.mcl_level[0]) ? card->info.mcl_level : "",
2605                  (card->info.mcl_level[0]) ? ")" : "",
2606                  qeth_get_cardname_short(card));
2607 }
2608 EXPORT_SYMBOL_GPL(qeth_print_status_message);
2609
2610 static void qeth_initialize_working_pool_list(struct qeth_card *card)
2611 {
2612         struct qeth_buffer_pool_entry *entry;
2613
2614         QETH_CARD_TEXT(card, 5, "inwrklst");
2615
2616         list_for_each_entry(entry,
2617                             &card->qdio.init_pool.entry_list, init_list) {
2618                 qeth_put_buffer_pool_entry(card, entry);
2619         }
2620 }
2621
2622 static struct qeth_buffer_pool_entry *qeth_find_free_buffer_pool_entry(
2623                                         struct qeth_card *card)
2624 {
2625         struct list_head *plh;
2626         struct qeth_buffer_pool_entry *entry;
2627         int i, free;
2628         struct page *page;
2629
2630         if (list_empty(&card->qdio.in_buf_pool.entry_list))
2631                 return NULL;
2632
2633         list_for_each(plh, &card->qdio.in_buf_pool.entry_list) {
2634                 entry = list_entry(plh, struct qeth_buffer_pool_entry, list);
2635                 free = 1;
2636                 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2637                         if (page_count(virt_to_page(entry->elements[i])) > 1) {
2638                                 free = 0;
2639                                 break;
2640                         }
2641                 }
2642                 if (free) {
2643                         list_del_init(&entry->list);
2644                         return entry;
2645                 }
2646         }
2647
2648         /* no free buffer in pool so take first one and swap pages */
2649         entry = list_entry(card->qdio.in_buf_pool.entry_list.next,
2650                         struct qeth_buffer_pool_entry, list);
2651         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2652                 if (page_count(virt_to_page(entry->elements[i])) > 1) {
2653                         page = alloc_page(GFP_ATOMIC);
2654                         if (!page) {
2655                                 return NULL;
2656                         } else {
2657                                 free_page((unsigned long)entry->elements[i]);
2658                                 entry->elements[i] = page_address(page);
2659                                 QETH_CARD_STAT_INC(card, rx_sg_alloc_page);
2660                         }
2661                 }
2662         }
2663         list_del_init(&entry->list);
2664         return entry;
2665 }
2666
2667 static int qeth_init_input_buffer(struct qeth_card *card,
2668                 struct qeth_qdio_buffer *buf)
2669 {
2670         struct qeth_buffer_pool_entry *pool_entry;
2671         int i;
2672
2673         if ((card->options.cq == QETH_CQ_ENABLED) && (!buf->rx_skb)) {
2674                 buf->rx_skb = netdev_alloc_skb(card->dev,
2675                                                QETH_RX_PULL_LEN + ETH_HLEN);
2676                 if (!buf->rx_skb)
2677                         return 1;
2678         }
2679
2680         pool_entry = qeth_find_free_buffer_pool_entry(card);
2681         if (!pool_entry)
2682                 return 1;
2683
2684         /*
2685          * since the buffer is accessed only from the input_tasklet
2686          * there shouldn't be a need to synchronize; also, since we use
2687          * the QETH_IN_BUF_REQUEUE_THRESHOLD we should never run  out off
2688          * buffers
2689          */
2690
2691         buf->pool_entry = pool_entry;
2692         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2693                 buf->buffer->element[i].length = PAGE_SIZE;
2694                 buf->buffer->element[i].addr =  pool_entry->elements[i];
2695                 if (i == QETH_MAX_BUFFER_ELEMENTS(card) - 1)
2696                         buf->buffer->element[i].eflags = SBAL_EFLAGS_LAST_ENTRY;
2697                 else
2698                         buf->buffer->element[i].eflags = 0;
2699                 buf->buffer->element[i].sflags = 0;
2700         }
2701         return 0;
2702 }
2703
2704 int qeth_init_qdio_queues(struct qeth_card *card)
2705 {
2706         unsigned int i;
2707         int rc;
2708
2709         QETH_DBF_TEXT(SETUP, 2, "initqdqs");
2710
2711         /* inbound queue */
2712         qdio_reset_buffers(card->qdio.in_q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2713         memset(&card->rx, 0, sizeof(struct qeth_rx));
2714         qeth_initialize_working_pool_list(card);
2715         /*give only as many buffers to hardware as we have buffer pool entries*/
2716         for (i = 0; i < card->qdio.in_buf_pool.buf_count - 1; ++i)
2717                 qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]);
2718         card->qdio.in_q->next_buf_to_init =
2719                 card->qdio.in_buf_pool.buf_count - 1;
2720         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0, 0,
2721                      card->qdio.in_buf_pool.buf_count - 1);
2722         if (rc) {
2723                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
2724                 return rc;
2725         }
2726
2727         /* completion */
2728         rc = qeth_cq_init(card);
2729         if (rc) {
2730                 return rc;
2731         }
2732
2733         /* outbound queue */
2734         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2735                 struct qeth_qdio_out_q *queue = card->qdio.out_qs[i];
2736
2737                 qdio_reset_buffers(queue->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2738                 queue->max_elements = QETH_MAX_BUFFER_ELEMENTS(card);
2739                 queue->next_buf_to_fill = 0;
2740                 queue->do_pack = 0;
2741                 atomic_set(&queue->used_buffers, 0);
2742                 atomic_set(&queue->set_pci_flags_count, 0);
2743                 atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
2744         }
2745         return 0;
2746 }
2747 EXPORT_SYMBOL_GPL(qeth_init_qdio_queues);
2748
2749 static __u8 qeth_get_ipa_adp_type(enum qeth_link_types link_type)
2750 {
2751         switch (link_type) {
2752         case QETH_LINK_TYPE_HSTR:
2753                 return 2;
2754         default:
2755                 return 1;
2756         }
2757 }
2758
2759 static void qeth_fill_ipacmd_header(struct qeth_card *card,
2760                                     struct qeth_ipa_cmd *cmd,
2761                                     enum qeth_ipa_cmds command,
2762                                     enum qeth_prot_versions prot)
2763 {
2764         cmd->hdr.command = command;
2765         cmd->hdr.initiator = IPA_CMD_INITIATOR_HOST;
2766         /* cmd->hdr.seqno is set by qeth_send_control_data() */
2767         cmd->hdr.adapter_type = qeth_get_ipa_adp_type(card->info.link_type);
2768         cmd->hdr.rel_adapter_no = (u8) card->dev->dev_port;
2769         cmd->hdr.prim_version_no = IS_LAYER2(card) ? 2 : 1;
2770         cmd->hdr.param_count = 1;
2771         cmd->hdr.prot_version = prot;
2772 }
2773
2774 static void qeth_ipa_finalize_cmd(struct qeth_card *card,
2775                                   struct qeth_cmd_buffer *iob,
2776                                   unsigned int length)
2777 {
2778         qeth_mpc_finalize_cmd(card, iob, length);
2779
2780         /* override with IPA-specific values: */
2781         __ipa_cmd(iob)->hdr.seqno = card->seqno.ipa;
2782         iob->reply->seqno = card->seqno.ipa++;
2783 }
2784
2785 void qeth_prepare_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
2786                           u16 cmd_length)
2787 {
2788         u16 total_length = IPA_PDU_HEADER_SIZE + cmd_length;
2789         u8 prot_type = qeth_mpc_select_prot_type(card);
2790
2791         iob->finalize = qeth_ipa_finalize_cmd;
2792         iob->timeout = QETH_IPA_TIMEOUT;
2793
2794         memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
2795         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &total_length, 2);
2796         memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1);
2797         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &cmd_length, 2);
2798         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &cmd_length, 2);
2799         memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
2800                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2801         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &cmd_length, 2);
2802 }
2803 EXPORT_SYMBOL_GPL(qeth_prepare_ipa_cmd);
2804
2805 struct qeth_cmd_buffer *qeth_get_ipacmd_buffer(struct qeth_card *card,
2806                 enum qeth_ipa_cmds ipacmd, enum qeth_prot_versions prot)
2807 {
2808         struct qeth_cmd_buffer *iob;
2809
2810         iob = qeth_get_buffer(&card->write);
2811         if (iob) {
2812                 qeth_prepare_ipa_cmd(card, iob, sizeof(struct qeth_ipa_cmd));
2813                 qeth_fill_ipacmd_header(card, __ipa_cmd(iob), ipacmd, prot);
2814         } else {
2815                 dev_warn(&card->gdev->dev,
2816                          "The qeth driver ran out of channel command buffers\n");
2817                 QETH_DBF_MESSAGE(1, "device %x ran out of channel command buffers",
2818                                  CARD_DEVID(card));
2819         }
2820
2821         return iob;
2822 }
2823 EXPORT_SYMBOL_GPL(qeth_get_ipacmd_buffer);
2824
2825 static int qeth_send_ipa_cmd_cb(struct qeth_card *card,
2826                                 struct qeth_reply *reply, unsigned long data)
2827 {
2828         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2829
2830         return (cmd->hdr.return_code) ? -EIO : 0;
2831 }
2832
2833 /**
2834  * qeth_send_ipa_cmd() - send an IPA command
2835  *
2836  * See qeth_send_control_data() for explanation of the arguments.
2837  */
2838
2839 int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
2840                 int (*reply_cb)(struct qeth_card *, struct qeth_reply*,
2841                         unsigned long),
2842                 void *reply_param)
2843 {
2844         u16 length;
2845         int rc;
2846
2847         QETH_CARD_TEXT(card, 4, "sendipa");
2848
2849         if (card->read_or_write_problem) {
2850                 qeth_release_buffer(iob->channel, iob);
2851                 return -EIO;
2852         }
2853
2854         if (reply_cb == NULL)
2855                 reply_cb = qeth_send_ipa_cmd_cb;
2856         memcpy(&length, QETH_IPA_PDU_LEN_TOTAL(iob->data), 2);
2857         rc = qeth_send_control_data(card, length, iob, reply_cb, reply_param);
2858         if (rc == -ETIME) {
2859                 qeth_clear_ipacmd_list(card);
2860                 qeth_schedule_recovery(card);
2861         }
2862         return rc;
2863 }
2864 EXPORT_SYMBOL_GPL(qeth_send_ipa_cmd);
2865
2866 static int qeth_send_startlan_cb(struct qeth_card *card,
2867                                  struct qeth_reply *reply, unsigned long data)
2868 {
2869         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2870
2871         if (cmd->hdr.return_code == IPA_RC_LAN_OFFLINE)
2872                 return -ENETDOWN;
2873
2874         return (cmd->hdr.return_code) ? -EIO : 0;
2875 }
2876
2877 static int qeth_send_startlan(struct qeth_card *card)
2878 {
2879         struct qeth_cmd_buffer *iob;
2880
2881         QETH_DBF_TEXT(SETUP, 2, "strtlan");
2882
2883         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_STARTLAN, 0);
2884         if (!iob)
2885                 return -ENOMEM;
2886         return qeth_send_ipa_cmd(card, iob, qeth_send_startlan_cb, NULL);
2887 }
2888
2889 static int qeth_setadpparms_inspect_rc(struct qeth_ipa_cmd *cmd)
2890 {
2891         if (!cmd->hdr.return_code)
2892                 cmd->hdr.return_code =
2893                         cmd->data.setadapterparms.hdr.return_code;
2894         return cmd->hdr.return_code;
2895 }
2896
2897 static int qeth_query_setadapterparms_cb(struct qeth_card *card,
2898                 struct qeth_reply *reply, unsigned long data)
2899 {
2900         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2901
2902         QETH_CARD_TEXT(card, 3, "quyadpcb");
2903         if (qeth_setadpparms_inspect_rc(cmd))
2904                 return -EIO;
2905
2906         if (cmd->data.setadapterparms.data.query_cmds_supp.lan_type & 0x7f) {
2907                 card->info.link_type =
2908                       cmd->data.setadapterparms.data.query_cmds_supp.lan_type;
2909                 QETH_DBF_TEXT_(SETUP, 2, "lnk %d", card->info.link_type);
2910         }
2911         card->options.adp.supported_funcs =
2912                 cmd->data.setadapterparms.data.query_cmds_supp.supported_cmds;
2913         return 0;
2914 }
2915
2916 static struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card,
2917                 __u32 command, __u32 cmdlen)
2918 {
2919         struct qeth_cmd_buffer *iob;
2920         struct qeth_ipa_cmd *cmd;
2921
2922         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SETADAPTERPARMS,
2923                                      QETH_PROT_IPV4);
2924         if (iob) {
2925                 cmd = __ipa_cmd(iob);
2926                 cmd->data.setadapterparms.hdr.cmdlength = cmdlen;
2927                 cmd->data.setadapterparms.hdr.command_code = command;
2928                 cmd->data.setadapterparms.hdr.used_total = 1;
2929                 cmd->data.setadapterparms.hdr.seq_no = 1;
2930         }
2931
2932         return iob;
2933 }
2934
2935 static int qeth_query_setadapterparms(struct qeth_card *card)
2936 {
2937         int rc;
2938         struct qeth_cmd_buffer *iob;
2939
2940         QETH_CARD_TEXT(card, 3, "queryadp");
2941         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_COMMANDS_SUPPORTED,
2942                                    sizeof(struct qeth_ipacmd_setadpparms));
2943         if (!iob)
2944                 return -ENOMEM;
2945         rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL);
2946         return rc;
2947 }
2948
2949 static int qeth_query_ipassists_cb(struct qeth_card *card,
2950                 struct qeth_reply *reply, unsigned long data)
2951 {
2952         struct qeth_ipa_cmd *cmd;
2953
2954         QETH_DBF_TEXT(SETUP, 2, "qipasscb");
2955
2956         cmd = (struct qeth_ipa_cmd *) data;
2957
2958         switch (cmd->hdr.return_code) {
2959         case IPA_RC_SUCCESS:
2960                 break;
2961         case IPA_RC_NOTSUPP:
2962         case IPA_RC_L2_UNSUPPORTED_CMD:
2963                 QETH_DBF_TEXT(SETUP, 2, "ipaunsup");
2964                 card->options.ipa4.supported_funcs |= IPA_SETADAPTERPARMS;
2965                 card->options.ipa6.supported_funcs |= IPA_SETADAPTERPARMS;
2966                 return -EOPNOTSUPP;
2967         default:
2968                 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Unhandled rc=%#x\n",
2969                                  CARD_DEVID(card), cmd->hdr.return_code);
2970                 return -EIO;
2971         }
2972
2973         if (cmd->hdr.prot_version == QETH_PROT_IPV4) {
2974                 card->options.ipa4.supported_funcs = cmd->hdr.ipa_supported;
2975                 card->options.ipa4.enabled_funcs = cmd->hdr.ipa_enabled;
2976         } else if (cmd->hdr.prot_version == QETH_PROT_IPV6) {
2977                 card->options.ipa6.supported_funcs = cmd->hdr.ipa_supported;
2978                 card->options.ipa6.enabled_funcs = cmd->hdr.ipa_enabled;
2979         } else
2980                 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Flawed LIC detected\n",
2981                                  CARD_DEVID(card));
2982         return 0;
2983 }
2984
2985 static int qeth_query_ipassists(struct qeth_card *card,
2986                                 enum qeth_prot_versions prot)
2987 {
2988         int rc;
2989         struct qeth_cmd_buffer *iob;
2990
2991         QETH_DBF_TEXT_(SETUP, 2, "qipassi%i", prot);
2992         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_QIPASSIST, prot);
2993         if (!iob)
2994                 return -ENOMEM;
2995         rc = qeth_send_ipa_cmd(card, iob, qeth_query_ipassists_cb, NULL);
2996         return rc;
2997 }
2998
2999 static int qeth_query_switch_attributes_cb(struct qeth_card *card,
3000                                 struct qeth_reply *reply, unsigned long data)
3001 {
3002         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3003         struct qeth_query_switch_attributes *attrs;
3004         struct qeth_switch_info *sw_info;
3005
3006         QETH_CARD_TEXT(card, 2, "qswiatcb");
3007         if (qeth_setadpparms_inspect_rc(cmd))
3008                 return -EIO;
3009
3010         sw_info = (struct qeth_switch_info *)reply->param;
3011         attrs = &cmd->data.setadapterparms.data.query_switch_attributes;
3012         sw_info->capabilities = attrs->capabilities;
3013         sw_info->settings = attrs->settings;
3014         QETH_CARD_TEXT_(card, 2, "%04x%04x", sw_info->capabilities,
3015                         sw_info->settings);
3016         return 0;
3017 }
3018
3019 int qeth_query_switch_attributes(struct qeth_card *card,
3020                                  struct qeth_switch_info *sw_info)
3021 {
3022         struct qeth_cmd_buffer *iob;
3023
3024         QETH_CARD_TEXT(card, 2, "qswiattr");
3025         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES))
3026                 return -EOPNOTSUPP;
3027         if (!netif_carrier_ok(card->dev))
3028                 return -ENOMEDIUM;
3029         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES,
3030                                 sizeof(struct qeth_ipacmd_setadpparms_hdr));
3031         if (!iob)
3032                 return -ENOMEM;
3033         return qeth_send_ipa_cmd(card, iob,
3034                                 qeth_query_switch_attributes_cb, sw_info);
3035 }
3036
3037 static int qeth_query_setdiagass_cb(struct qeth_card *card,
3038                 struct qeth_reply *reply, unsigned long data)
3039 {
3040         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3041         u16 rc = cmd->hdr.return_code;
3042
3043         if (rc) {
3044                 QETH_CARD_TEXT_(card, 2, "diagq:%x", rc);
3045                 return -EIO;
3046         }
3047
3048         card->info.diagass_support = cmd->data.diagass.ext;
3049         return 0;
3050 }
3051
3052 static int qeth_query_setdiagass(struct qeth_card *card)
3053 {
3054         struct qeth_cmd_buffer *iob;
3055         struct qeth_ipa_cmd    *cmd;
3056
3057         QETH_DBF_TEXT(SETUP, 2, "qdiagass");
3058         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SET_DIAG_ASS, 0);
3059         if (!iob)
3060                 return -ENOMEM;
3061         cmd = __ipa_cmd(iob);
3062         cmd->data.diagass.subcmd_len = 16;
3063         cmd->data.diagass.subcmd = QETH_DIAGS_CMD_QUERY;
3064         return qeth_send_ipa_cmd(card, iob, qeth_query_setdiagass_cb, NULL);
3065 }
3066
3067 static void qeth_get_trap_id(struct qeth_card *card, struct qeth_trap_id *tid)
3068 {
3069         unsigned long info = get_zeroed_page(GFP_KERNEL);
3070         struct sysinfo_2_2_2 *info222 = (struct sysinfo_2_2_2 *)info;
3071         struct sysinfo_3_2_2 *info322 = (struct sysinfo_3_2_2 *)info;
3072         struct ccw_dev_id ccwid;
3073         int level;
3074
3075         tid->chpid = card->info.chpid;
3076         ccw_device_get_id(CARD_RDEV(card), &ccwid);
3077         tid->ssid = ccwid.ssid;
3078         tid->devno = ccwid.devno;
3079         if (!info)
3080                 return;
3081         level = stsi(NULL, 0, 0, 0);
3082         if ((level >= 2) && (stsi(info222, 2, 2, 2) == 0))
3083                 tid->lparnr = info222->lpar_number;
3084         if ((level >= 3) && (stsi(info322, 3, 2, 2) == 0)) {
3085                 EBCASC(info322->vm[0].name, sizeof(info322->vm[0].name));
3086                 memcpy(tid->vmname, info322->vm[0].name, sizeof(tid->vmname));
3087         }
3088         free_page(info);
3089         return;
3090 }
3091
3092 static int qeth_hw_trap_cb(struct qeth_card *card,
3093                 struct qeth_reply *reply, unsigned long data)
3094 {
3095         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3096         u16 rc = cmd->hdr.return_code;
3097
3098         if (rc) {
3099                 QETH_CARD_TEXT_(card, 2, "trapc:%x", rc);
3100                 return -EIO;
3101         }
3102         return 0;
3103 }
3104
3105 int qeth_hw_trap(struct qeth_card *card, enum qeth_diags_trap_action action)
3106 {
3107         struct qeth_cmd_buffer *iob;
3108         struct qeth_ipa_cmd *cmd;
3109
3110         QETH_DBF_TEXT(SETUP, 2, "diagtrap");
3111         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SET_DIAG_ASS, 0);
3112         if (!iob)
3113                 return -ENOMEM;
3114         cmd = __ipa_cmd(iob);
3115         cmd->data.diagass.subcmd_len = 80;
3116         cmd->data.diagass.subcmd = QETH_DIAGS_CMD_TRAP;
3117         cmd->data.diagass.type = 1;
3118         cmd->data.diagass.action = action;
3119         switch (action) {
3120         case QETH_DIAGS_TRAP_ARM:
3121                 cmd->data.diagass.options = 0x0003;
3122                 cmd->data.diagass.ext = 0x00010000 +
3123                         sizeof(struct qeth_trap_id);
3124                 qeth_get_trap_id(card,
3125                         (struct qeth_trap_id *)cmd->data.diagass.cdata);
3126                 break;
3127         case QETH_DIAGS_TRAP_DISARM:
3128                 cmd->data.diagass.options = 0x0001;
3129                 break;
3130         case QETH_DIAGS_TRAP_CAPTURE:
3131                 break;
3132         }
3133         return qeth_send_ipa_cmd(card, iob, qeth_hw_trap_cb, NULL);
3134 }
3135 EXPORT_SYMBOL_GPL(qeth_hw_trap);
3136
3137 static int qeth_check_qdio_errors(struct qeth_card *card,
3138                                   struct qdio_buffer *buf,
3139                                   unsigned int qdio_error,
3140                                   const char *dbftext)
3141 {
3142         if (qdio_error) {
3143                 QETH_CARD_TEXT(card, 2, dbftext);
3144                 QETH_CARD_TEXT_(card, 2, " F15=%02X",
3145                                buf->element[15].sflags);
3146                 QETH_CARD_TEXT_(card, 2, " F14=%02X",
3147                                buf->element[14].sflags);
3148                 QETH_CARD_TEXT_(card, 2, " qerr=%X", qdio_error);
3149                 if ((buf->element[15].sflags) == 0x12) {
3150                         QETH_CARD_STAT_INC(card, rx_dropped);
3151                         return 0;
3152                 } else
3153                         return 1;
3154         }
3155         return 0;
3156 }
3157
3158 static void qeth_queue_input_buffer(struct qeth_card *card, int index)
3159 {
3160         struct qeth_qdio_q *queue = card->qdio.in_q;
3161         struct list_head *lh;
3162         int count;
3163         int i;
3164         int rc;
3165         int newcount = 0;
3166
3167         count = (index < queue->next_buf_to_init)?
3168                 card->qdio.in_buf_pool.buf_count -
3169                 (queue->next_buf_to_init - index) :
3170                 card->qdio.in_buf_pool.buf_count -
3171                 (queue->next_buf_to_init + QDIO_MAX_BUFFERS_PER_Q - index);
3172         /* only requeue at a certain threshold to avoid SIGAs */
3173         if (count >= QETH_IN_BUF_REQUEUE_THRESHOLD(card)) {
3174                 for (i = queue->next_buf_to_init;
3175                      i < queue->next_buf_to_init + count; ++i) {
3176                         if (qeth_init_input_buffer(card,
3177                                 &queue->bufs[i % QDIO_MAX_BUFFERS_PER_Q])) {
3178                                 break;
3179                         } else {
3180                                 newcount++;
3181                         }
3182                 }
3183
3184                 if (newcount < count) {
3185                         /* we are in memory shortage so we switch back to
3186                            traditional skb allocation and drop packages */
3187                         atomic_set(&card->force_alloc_skb, 3);
3188                         count = newcount;
3189                 } else {
3190                         atomic_add_unless(&card->force_alloc_skb, -1, 0);
3191                 }
3192
3193                 if (!count) {
3194                         i = 0;
3195                         list_for_each(lh, &card->qdio.in_buf_pool.entry_list)
3196                                 i++;
3197                         if (i == card->qdio.in_buf_pool.buf_count) {
3198                                 QETH_CARD_TEXT(card, 2, "qsarbw");
3199                                 card->reclaim_index = index;
3200                                 schedule_delayed_work(
3201                                         &card->buffer_reclaim_work,
3202                                         QETH_RECLAIM_WORK_TIME);
3203                         }
3204                         return;
3205                 }
3206
3207                 /*
3208                  * according to old code it should be avoided to requeue all
3209                  * 128 buffers in order to benefit from PCI avoidance.
3210                  * this function keeps at least one buffer (the buffer at
3211                  * 'index') un-requeued -> this buffer is the first buffer that
3212                  * will be requeued the next time
3213                  */
3214                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0,
3215                              queue->next_buf_to_init, count);
3216                 if (rc) {
3217                         QETH_CARD_TEXT(card, 2, "qinberr");
3218                 }
3219                 queue->next_buf_to_init = (queue->next_buf_to_init + count) %
3220                                           QDIO_MAX_BUFFERS_PER_Q;
3221         }
3222 }
3223
3224 static void qeth_buffer_reclaim_work(struct work_struct *work)
3225 {
3226         struct qeth_card *card = container_of(work, struct qeth_card,
3227                 buffer_reclaim_work.work);
3228
3229         QETH_CARD_TEXT_(card, 2, "brw:%x", card->reclaim_index);
3230         qeth_queue_input_buffer(card, card->reclaim_index);
3231 }
3232
3233 static void qeth_handle_send_error(struct qeth_card *card,
3234                 struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err)
3235 {
3236         int sbalf15 = buffer->buffer->element[15].sflags;
3237
3238         QETH_CARD_TEXT(card, 6, "hdsnderr");
3239         if (IS_IQD(card)) {
3240                 if (sbalf15 == 0) {
3241                         qdio_err = 0;
3242                 } else {
3243                         qdio_err = 1;
3244                 }
3245         }
3246         qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr");
3247
3248         if (!qdio_err)
3249                 return;
3250
3251         if ((sbalf15 >= 15) && (sbalf15 <= 31))
3252                 return;
3253
3254         QETH_CARD_TEXT(card, 1, "lnkfail");
3255         QETH_CARD_TEXT_(card, 1, "%04x %02x",
3256                        (u16)qdio_err, (u8)sbalf15);
3257 }
3258
3259 /**
3260  * qeth_prep_flush_pack_buffer - Prepares flushing of a packing buffer.
3261  * @queue: queue to check for packing buffer
3262  *
3263  * Returns number of buffers that were prepared for flush.
3264  */
3265 static int qeth_prep_flush_pack_buffer(struct qeth_qdio_out_q *queue)
3266 {
3267         struct qeth_qdio_out_buffer *buffer;
3268
3269         buffer = queue->bufs[queue->next_buf_to_fill];
3270         if ((atomic_read(&buffer->state) == QETH_QDIO_BUF_EMPTY) &&
3271             (buffer->next_element_to_fill > 0)) {
3272                 /* it's a packing buffer */
3273                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3274                 queue->next_buf_to_fill =
3275                         (queue->next_buf_to_fill + 1) % QDIO_MAX_BUFFERS_PER_Q;
3276                 return 1;
3277         }
3278         return 0;
3279 }
3280
3281 /*
3282  * Switched to packing state if the number of used buffers on a queue
3283  * reaches a certain limit.
3284  */
3285 static void qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q *queue)
3286 {
3287         if (!queue->do_pack) {
3288                 if (atomic_read(&queue->used_buffers)
3289                     >= QETH_HIGH_WATERMARK_PACK){
3290                         /* switch non-PACKING -> PACKING */
3291                         QETH_CARD_TEXT(queue->card, 6, "np->pack");
3292                         QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3293                         queue->do_pack = 1;
3294                 }
3295         }
3296 }
3297
3298 /*
3299  * Switches from packing to non-packing mode. If there is a packing
3300  * buffer on the queue this buffer will be prepared to be flushed.
3301  * In that case 1 is returned to inform the caller. If no buffer
3302  * has to be flushed, zero is returned.
3303  */
3304 static int qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q *queue)
3305 {
3306         if (queue->do_pack) {
3307                 if (atomic_read(&queue->used_buffers)
3308                     <= QETH_LOW_WATERMARK_PACK) {
3309                         /* switch PACKING -> non-PACKING */
3310                         QETH_CARD_TEXT(queue->card, 6, "pack->np");
3311                         QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3312                         queue->do_pack = 0;
3313                         return qeth_prep_flush_pack_buffer(queue);
3314                 }
3315         }
3316         return 0;
3317 }
3318
3319 static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
3320                                int count)
3321 {
3322         struct qeth_qdio_out_buffer *buf;
3323         int rc;
3324         int i;
3325         unsigned int qdio_flags;
3326
3327         for (i = index; i < index + count; ++i) {
3328                 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3329                 buf = queue->bufs[bidx];
3330                 buf->buffer->element[buf->next_element_to_fill - 1].eflags |=
3331                                 SBAL_EFLAGS_LAST_ENTRY;
3332
3333                 if (queue->bufstates)
3334                         queue->bufstates[bidx].user = buf;
3335
3336                 if (IS_IQD(queue->card))
3337                         continue;
3338
3339                 if (!queue->do_pack) {
3340                         if ((atomic_read(&queue->used_buffers) >=
3341                                 (QETH_HIGH_WATERMARK_PACK -
3342                                  QETH_WATERMARK_PACK_FUZZ)) &&
3343                             !atomic_read(&queue->set_pci_flags_count)) {
3344                                 /* it's likely that we'll go to packing
3345                                  * mode soon */
3346                                 atomic_inc(&queue->set_pci_flags_count);
3347                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3348                         }
3349                 } else {
3350                         if (!atomic_read(&queue->set_pci_flags_count)) {
3351                                 /*
3352                                  * there's no outstanding PCI any more, so we
3353                                  * have to request a PCI to be sure the the PCI
3354                                  * will wake at some time in the future then we
3355                                  * can flush packed buffers that might still be
3356                                  * hanging around, which can happen if no
3357                                  * further send was requested by the stack
3358                                  */
3359                                 atomic_inc(&queue->set_pci_flags_count);
3360                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3361                         }
3362                 }
3363         }
3364
3365         QETH_TXQ_STAT_ADD(queue, bufs, count);
3366         qdio_flags = QDIO_FLAG_SYNC_OUTPUT;
3367         if (atomic_read(&queue->set_pci_flags_count))
3368                 qdio_flags |= QDIO_FLAG_PCI_OUT;
3369         rc = do_QDIO(CARD_DDEV(queue->card), qdio_flags,
3370                      queue->queue_no, index, count);
3371         if (rc) {
3372                 QETH_TXQ_STAT_ADD(queue, tx_errors, count);
3373                 /* ignore temporary SIGA errors without busy condition */
3374                 if (rc == -ENOBUFS)
3375                         return;
3376                 QETH_CARD_TEXT(queue->card, 2, "flushbuf");
3377                 QETH_CARD_TEXT_(queue->card, 2, " q%d", queue->queue_no);
3378                 QETH_CARD_TEXT_(queue->card, 2, " idx%d", index);
3379                 QETH_CARD_TEXT_(queue->card, 2, " c%d", count);
3380                 QETH_CARD_TEXT_(queue->card, 2, " err%d", rc);
3381
3382                 /* this must not happen under normal circumstances. if it
3383                  * happens something is really wrong -> recover */
3384                 qeth_schedule_recovery(queue->card);
3385                 return;
3386         }
3387 }
3388
3389 static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue)
3390 {
3391         int index;
3392         int flush_cnt = 0;
3393         int q_was_packing = 0;
3394
3395         /*
3396          * check if weed have to switch to non-packing mode or if
3397          * we have to get a pci flag out on the queue
3398          */
3399         if ((atomic_read(&queue->used_buffers) <= QETH_LOW_WATERMARK_PACK) ||
3400             !atomic_read(&queue->set_pci_flags_count)) {
3401                 if (atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH) ==
3402                                 QETH_OUT_Q_UNLOCKED) {
3403                         /*
3404                          * If we get in here, there was no action in
3405                          * do_send_packet. So, we check if there is a
3406                          * packing buffer to be flushed here.
3407                          */
3408                         index = queue->next_buf_to_fill;
3409                         q_was_packing = queue->do_pack;
3410                         /* queue->do_pack may change */
3411                         barrier();
3412                         flush_cnt += qeth_switch_to_nonpacking_if_needed(queue);
3413                         if (!flush_cnt &&
3414                             !atomic_read(&queue->set_pci_flags_count))
3415                                 flush_cnt += qeth_prep_flush_pack_buffer(queue);
3416                         if (q_was_packing)
3417                                 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_cnt);
3418                         if (flush_cnt)
3419                                 qeth_flush_buffers(queue, index, flush_cnt);
3420                         atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
3421                 }
3422         }
3423 }
3424
3425 static void qeth_qdio_start_poll(struct ccw_device *ccwdev, int queue,
3426                                  unsigned long card_ptr)
3427 {
3428         struct qeth_card *card = (struct qeth_card *)card_ptr;
3429
3430         if (card->dev->flags & IFF_UP)
3431                 napi_schedule(&card->napi);
3432 }
3433
3434 int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq)
3435 {
3436         int rc;
3437
3438         if (card->options.cq ==  QETH_CQ_NOTAVAILABLE) {
3439                 rc = -1;
3440                 goto out;
3441         } else {
3442                 if (card->options.cq == cq) {
3443                         rc = 0;
3444                         goto out;
3445                 }
3446
3447                 if (card->state != CARD_STATE_DOWN) {
3448                         rc = -1;
3449                         goto out;
3450                 }
3451
3452                 qeth_free_qdio_queues(card);
3453                 card->options.cq = cq;
3454                 rc = 0;
3455         }
3456 out:
3457         return rc;
3458
3459 }
3460 EXPORT_SYMBOL_GPL(qeth_configure_cq);
3461
3462 static void qeth_qdio_cq_handler(struct qeth_card *card, unsigned int qdio_err,
3463                                  unsigned int queue, int first_element,
3464                                  int count)
3465 {
3466         struct qeth_qdio_q *cq = card->qdio.c_q;
3467         int i;
3468         int rc;
3469
3470         if (!qeth_is_cq(card, queue))
3471                 return;
3472
3473         QETH_CARD_TEXT_(card, 5, "qcqhe%d", first_element);
3474         QETH_CARD_TEXT_(card, 5, "qcqhc%d", count);
3475         QETH_CARD_TEXT_(card, 5, "qcqherr%d", qdio_err);
3476
3477         if (qdio_err) {
3478                 netif_tx_stop_all_queues(card->dev);
3479                 qeth_schedule_recovery(card);
3480                 return;
3481         }
3482
3483         for (i = first_element; i < first_element + count; ++i) {
3484                 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3485                 struct qdio_buffer *buffer = cq->qdio_bufs[bidx];
3486                 int e = 0;
3487
3488                 while ((e < QDIO_MAX_ELEMENTS_PER_BUFFER) &&
3489                        buffer->element[e].addr) {
3490                         unsigned long phys_aob_addr;
3491
3492                         phys_aob_addr = (unsigned long) buffer->element[e].addr;
3493                         qeth_qdio_handle_aob(card, phys_aob_addr);
3494                         ++e;
3495                 }
3496                 qeth_scrub_qdio_buffer(buffer, QDIO_MAX_ELEMENTS_PER_BUFFER);
3497         }
3498         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, queue,
3499                     card->qdio.c_q->next_buf_to_init,
3500                     count);
3501         if (rc) {
3502                 dev_warn(&card->gdev->dev,
3503                         "QDIO reported an error, rc=%i\n", rc);
3504                 QETH_CARD_TEXT(card, 2, "qcqherr");
3505         }
3506         card->qdio.c_q->next_buf_to_init = (card->qdio.c_q->next_buf_to_init
3507                                    + count) % QDIO_MAX_BUFFERS_PER_Q;
3508 }
3509
3510 static void qeth_qdio_input_handler(struct ccw_device *ccwdev,
3511                                     unsigned int qdio_err, int queue,
3512                                     int first_elem, int count,
3513                                     unsigned long card_ptr)
3514 {
3515         struct qeth_card *card = (struct qeth_card *)card_ptr;
3516
3517         QETH_CARD_TEXT_(card, 2, "qihq%d", queue);
3518         QETH_CARD_TEXT_(card, 2, "qiec%d", qdio_err);
3519
3520         if (qeth_is_cq(card, queue))
3521                 qeth_qdio_cq_handler(card, qdio_err, queue, first_elem, count);
3522         else if (qdio_err)
3523                 qeth_schedule_recovery(card);
3524 }
3525
3526 static void qeth_qdio_output_handler(struct ccw_device *ccwdev,
3527                                      unsigned int qdio_error, int __queue,
3528                                      int first_element, int count,
3529                                      unsigned long card_ptr)
3530 {
3531         struct qeth_card *card        = (struct qeth_card *) card_ptr;
3532         struct qeth_qdio_out_q *queue = card->qdio.out_qs[__queue];
3533         struct qeth_qdio_out_buffer *buffer;
3534         struct net_device *dev = card->dev;
3535         struct netdev_queue *txq;
3536         int i;
3537
3538         QETH_CARD_TEXT(card, 6, "qdouhdl");
3539         if (qdio_error & QDIO_ERROR_FATAL) {
3540                 QETH_CARD_TEXT(card, 2, "achkcond");
3541                 netif_tx_stop_all_queues(dev);
3542                 qeth_schedule_recovery(card);
3543                 return;
3544         }
3545
3546         for (i = first_element; i < (first_element + count); ++i) {
3547                 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3548                 buffer = queue->bufs[bidx];
3549                 qeth_handle_send_error(card, buffer, qdio_error);
3550
3551                 if (queue->bufstates &&
3552                     (queue->bufstates[bidx].flags &
3553                      QDIO_OUTBUF_STATE_FLAG_PENDING) != 0) {
3554                         WARN_ON_ONCE(card->options.cq != QETH_CQ_ENABLED);
3555
3556                         if (atomic_cmpxchg(&buffer->state,
3557                                            QETH_QDIO_BUF_PRIMED,
3558                                            QETH_QDIO_BUF_PENDING) ==
3559                                 QETH_QDIO_BUF_PRIMED) {
3560                                 qeth_notify_skbs(queue, buffer,
3561                                                  TX_NOTIFY_PENDING);
3562                         }
3563                         QETH_CARD_TEXT_(queue->card, 5, "pel%d", bidx);
3564
3565                         /* prepare the queue slot for re-use: */
3566                         qeth_scrub_qdio_buffer(buffer->buffer,
3567                                                queue->max_elements);
3568                         if (qeth_init_qdio_out_buf(queue, bidx)) {
3569                                 QETH_CARD_TEXT(card, 2, "outofbuf");
3570                                 qeth_schedule_recovery(card);
3571                         }
3572                 } else {
3573                         if (card->options.cq == QETH_CQ_ENABLED) {
3574                                 enum iucv_tx_notify n;
3575
3576                                 n = qeth_compute_cq_notification(
3577                                         buffer->buffer->element[15].sflags, 0);
3578                                 qeth_notify_skbs(queue, buffer, n);
3579                         }
3580
3581                         qeth_clear_output_buffer(queue, buffer);
3582                 }
3583                 qeth_cleanup_handled_pending(queue, bidx, 0);
3584         }
3585         atomic_sub(count, &queue->used_buffers);
3586         /* check if we need to do something on this outbound queue */
3587         if (!IS_IQD(card))
3588                 qeth_check_outbound_queue(queue);
3589
3590         if (IS_IQD(card))
3591                 __queue = qeth_iqd_translate_txq(dev, __queue);
3592         txq = netdev_get_tx_queue(dev, __queue);
3593         /* xmit may have observed the full-condition, but not yet stopped the
3594          * txq. In which case the code below won't trigger. So before returning,
3595          * xmit will re-check the txq's fill level and wake it up if needed.
3596          */
3597         if (netif_tx_queue_stopped(txq) && !qeth_out_queue_is_full(queue))
3598                 netif_tx_wake_queue(txq);
3599 }
3600
3601 /**
3602  * Note: Function assumes that we have 4 outbound queues.
3603  */
3604 int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb)
3605 {
3606         struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
3607         u8 tos;
3608
3609         switch (card->qdio.do_prio_queueing) {
3610         case QETH_PRIO_Q_ING_TOS:
3611         case QETH_PRIO_Q_ING_PREC:
3612                 switch (qeth_get_ip_version(skb)) {
3613                 case 4:
3614                         tos = ipv4_get_dsfield(ip_hdr(skb));
3615                         break;
3616                 case 6:
3617                         tos = ipv6_get_dsfield(ipv6_hdr(skb));
3618                         break;
3619                 default:
3620                         return card->qdio.default_out_queue;
3621                 }
3622                 if (card->qdio.do_prio_queueing == QETH_PRIO_Q_ING_PREC)
3623                         return ~tos >> 6 & 3;
3624                 if (tos & IPTOS_MINCOST)
3625                         return 3;
3626                 if (tos & IPTOS_RELIABILITY)
3627                         return 2;
3628                 if (tos & IPTOS_THROUGHPUT)
3629                         return 1;
3630                 if (tos & IPTOS_LOWDELAY)
3631                         return 0;
3632                 break;
3633         case QETH_PRIO_Q_ING_SKB:
3634                 if (skb->priority > 5)
3635                         return 0;
3636                 return ~skb->priority >> 1 & 3;
3637         case QETH_PRIO_Q_ING_VLAN:
3638                 if (veth->h_vlan_proto == htons(ETH_P_8021Q))
3639                         return ~ntohs(veth->h_vlan_TCI) >>
3640                                (VLAN_PRIO_SHIFT + 1) & 3;
3641                 break;
3642         default:
3643                 break;
3644         }
3645         return card->qdio.default_out_queue;
3646 }
3647 EXPORT_SYMBOL_GPL(qeth_get_priority_queue);
3648
3649 /**
3650  * qeth_get_elements_for_frags() -      find number of SBALEs for skb frags.
3651  * @skb:                                SKB address
3652  *
3653  * Returns the number of pages, and thus QDIO buffer elements, needed to cover
3654  * fragmented part of the SKB. Returns zero for linear SKB.
3655  */
3656 static int qeth_get_elements_for_frags(struct sk_buff *skb)
3657 {
3658         int cnt, elements = 0;
3659
3660         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3661                 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[cnt];
3662
3663                 elements += qeth_get_elements_for_range(
3664                         (addr_t)skb_frag_address(frag),
3665                         (addr_t)skb_frag_address(frag) + skb_frag_size(frag));
3666         }
3667         return elements;
3668 }
3669
3670 /**
3671  * qeth_count_elements() -      Counts the number of QDIO buffer elements needed
3672  *                              to transmit an skb.
3673  * @skb:                        the skb to operate on.
3674  * @data_offset:                skip this part of the skb's linear data
3675  *
3676  * Returns the number of pages, and thus QDIO buffer elements, needed to map the
3677  * skb's data (both its linear part and paged fragments).
3678  */
3679 unsigned int qeth_count_elements(struct sk_buff *skb, unsigned int data_offset)
3680 {
3681         unsigned int elements = qeth_get_elements_for_frags(skb);
3682         addr_t end = (addr_t)skb->data + skb_headlen(skb);
3683         addr_t start = (addr_t)skb->data + data_offset;
3684
3685         if (start != end)
3686                 elements += qeth_get_elements_for_range(start, end);
3687         return elements;
3688 }
3689 EXPORT_SYMBOL_GPL(qeth_count_elements);
3690
3691 #define QETH_HDR_CACHE_OBJ_SIZE         (sizeof(struct qeth_hdr_tso) + \
3692                                          MAX_TCP_HEADER)
3693
3694 /**
3695  * qeth_add_hw_header() - add a HW header to an skb.
3696  * @skb: skb that the HW header should be added to.
3697  * @hdr: double pointer to a qeth_hdr. When returning with >= 0,
3698  *       it contains a valid pointer to a qeth_hdr.
3699  * @hdr_len: length of the HW header.
3700  * @proto_len: length of protocol headers that need to be in same page as the
3701  *             HW header.
3702  *
3703  * Returns the pushed length. If the header can't be pushed on
3704  * (eg. because it would cross a page boundary), it is allocated from
3705  * the cache instead and 0 is returned.
3706  * The number of needed buffer elements is returned in @elements.
3707  * Error to create the hdr is indicated by returning with < 0.
3708  */
3709 static int qeth_add_hw_header(struct qeth_qdio_out_q *queue,
3710                               struct sk_buff *skb, struct qeth_hdr **hdr,
3711                               unsigned int hdr_len, unsigned int proto_len,
3712                               unsigned int *elements)
3713 {
3714         const unsigned int contiguous = proto_len ? proto_len : 1;
3715         const unsigned int max_elements = queue->max_elements;
3716         unsigned int __elements;
3717         addr_t start, end;
3718         bool push_ok;
3719         int rc;
3720
3721 check_layout:
3722         start = (addr_t)skb->data - hdr_len;
3723         end = (addr_t)skb->data;
3724
3725         if (qeth_get_elements_for_range(start, end + contiguous) == 1) {
3726                 /* Push HW header into same page as first protocol header. */
3727                 push_ok = true;
3728                 /* ... but TSO always needs a separate element for headers: */
3729                 if (skb_is_gso(skb))
3730                         __elements = 1 + qeth_count_elements(skb, proto_len);
3731                 else
3732                         __elements = qeth_count_elements(skb, 0);
3733         } else if (!proto_len && qeth_get_elements_for_range(start, end) == 1) {
3734                 /* Push HW header into a new page. */
3735                 push_ok = true;
3736                 __elements = 1 + qeth_count_elements(skb, 0);
3737         } else {
3738                 /* Use header cache, copy protocol headers up. */
3739                 push_ok = false;
3740                 __elements = 1 + qeth_count_elements(skb, proto_len);
3741         }
3742
3743         /* Compress skb to fit into one IO buffer: */
3744         if (__elements > max_elements) {
3745                 if (!skb_is_nonlinear(skb)) {
3746                         /* Drop it, no easy way of shrinking it further. */
3747                         QETH_DBF_MESSAGE(2, "Dropped an oversized skb (Max Elements=%u / Actual=%u / Length=%u).\n",
3748                                          max_elements, __elements, skb->len);
3749                         return -E2BIG;
3750                 }
3751
3752                 rc = skb_linearize(skb);
3753                 if (rc) {
3754                         QETH_TXQ_STAT_INC(queue, skbs_linearized_fail);
3755                         return rc;
3756                 }
3757
3758                 QETH_TXQ_STAT_INC(queue, skbs_linearized);
3759                 /* Linearization changed the layout, re-evaluate: */
3760                 goto check_layout;
3761         }
3762
3763         *elements = __elements;
3764         /* Add the header: */
3765         if (push_ok) {
3766                 *hdr = skb_push(skb, hdr_len);
3767                 return hdr_len;
3768         }
3769         /* fall back */
3770         if (hdr_len + proto_len > QETH_HDR_CACHE_OBJ_SIZE)
3771                 return -E2BIG;
3772         *hdr = kmem_cache_alloc(qeth_core_header_cache, GFP_ATOMIC);
3773         if (!*hdr)
3774                 return -ENOMEM;
3775         /* Copy protocol headers behind HW header: */
3776         skb_copy_from_linear_data(skb, ((char *)*hdr) + hdr_len, proto_len);
3777         return 0;
3778 }
3779
3780 static void __qeth_fill_buffer(struct sk_buff *skb,
3781                                struct qeth_qdio_out_buffer *buf,
3782                                bool is_first_elem, unsigned int offset)
3783 {
3784         struct qdio_buffer *buffer = buf->buffer;
3785         int element = buf->next_element_to_fill;
3786         int length = skb_headlen(skb) - offset;
3787         char *data = skb->data + offset;
3788         int length_here, cnt;
3789
3790         /* map linear part into buffer element(s) */
3791         while (length > 0) {
3792                 /* length_here is the remaining amount of data in this page */
3793                 length_here = PAGE_SIZE - ((unsigned long) data % PAGE_SIZE);
3794                 if (length < length_here)
3795                         length_here = length;
3796
3797                 buffer->element[element].addr = data;
3798                 buffer->element[element].length = length_here;
3799                 length -= length_here;
3800                 if (is_first_elem) {
3801                         is_first_elem = false;
3802                         if (length || skb_is_nonlinear(skb))
3803                                 /* skb needs additional elements */
3804                                 buffer->element[element].eflags =
3805                                         SBAL_EFLAGS_FIRST_FRAG;
3806                         else
3807                                 buffer->element[element].eflags = 0;
3808                 } else {
3809                         buffer->element[element].eflags =
3810                                 SBAL_EFLAGS_MIDDLE_FRAG;
3811                 }
3812                 data += length_here;
3813                 element++;
3814         }
3815
3816         /* map page frags into buffer element(s) */
3817         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3818                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
3819
3820                 data = skb_frag_address(frag);
3821                 length = skb_frag_size(frag);
3822                 while (length > 0) {
3823                         length_here = PAGE_SIZE -
3824                                 ((unsigned long) data % PAGE_SIZE);
3825                         if (length < length_here)
3826                                 length_here = length;
3827
3828                         buffer->element[element].addr = data;
3829                         buffer->element[element].length = length_here;
3830                         buffer->element[element].eflags =
3831                                 SBAL_EFLAGS_MIDDLE_FRAG;
3832                         length -= length_here;
3833                         data += length_here;
3834                         element++;
3835                 }
3836         }
3837
3838         if (buffer->element[element - 1].eflags)
3839                 buffer->element[element - 1].eflags = SBAL_EFLAGS_LAST_FRAG;
3840         buf->next_element_to_fill = element;
3841 }
3842
3843 /**
3844  * qeth_fill_buffer() - map skb into an output buffer
3845  * @queue:      QDIO queue to submit the buffer on
3846  * @buf:        buffer to transport the skb
3847  * @skb:        skb to map into the buffer
3848  * @hdr:        qeth_hdr for this skb. Either at skb->data, or allocated
3849  *              from qeth_core_header_cache.
3850  * @offset:     when mapping the skb, start at skb->data + offset
3851  * @hd_len:     if > 0, build a dedicated header element of this size
3852  * flush:       Prepare the buffer to be flushed, regardless of its fill level.
3853  */
3854 static int qeth_fill_buffer(struct qeth_qdio_out_q *queue,
3855                             struct qeth_qdio_out_buffer *buf,
3856                             struct sk_buff *skb, struct qeth_hdr *hdr,
3857                             unsigned int offset, unsigned int hd_len,
3858                             bool flush)
3859 {
3860         struct qdio_buffer *buffer = buf->buffer;
3861         bool is_first_elem = true;
3862
3863         __skb_queue_tail(&buf->skb_list, skb);
3864
3865         /* build dedicated header element */
3866         if (hd_len) {
3867                 int element = buf->next_element_to_fill;
3868                 is_first_elem = false;
3869
3870                 buffer->element[element].addr = hdr;
3871                 buffer->element[element].length = hd_len;
3872                 buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
3873                 /* remember to free cache-allocated qeth_hdr: */
3874                 buf->is_header[element] = ((void *)hdr != skb->data);
3875                 buf->next_element_to_fill++;
3876         }
3877
3878         __qeth_fill_buffer(skb, buf, is_first_elem, offset);
3879
3880         if (!queue->do_pack) {
3881                 QETH_CARD_TEXT(queue->card, 6, "fillbfnp");
3882         } else {
3883                 QETH_CARD_TEXT(queue->card, 6, "fillbfpa");
3884
3885                 QETH_TXQ_STAT_INC(queue, skbs_pack);
3886                 /* If the buffer still has free elements, keep using it. */
3887                 if (!flush &&
3888                     buf->next_element_to_fill < queue->max_elements)
3889                         return 0;
3890         }
3891
3892         /* flush out the buffer */
3893         atomic_set(&buf->state, QETH_QDIO_BUF_PRIMED);
3894         queue->next_buf_to_fill = (queue->next_buf_to_fill + 1) %
3895                                   QDIO_MAX_BUFFERS_PER_Q;
3896         return 1;
3897 }
3898
3899 static int qeth_do_send_packet_fast(struct qeth_qdio_out_q *queue,
3900                                     struct sk_buff *skb, struct qeth_hdr *hdr,
3901                                     unsigned int offset, unsigned int hd_len)
3902 {
3903         int index = queue->next_buf_to_fill;
3904         struct qeth_qdio_out_buffer *buffer = queue->bufs[index];
3905         struct netdev_queue *txq;
3906         bool stopped = false;
3907
3908         /* Just a sanity check, the wake/stop logic should ensure that we always
3909          * get a free buffer.
3910          */
3911         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
3912                 return -EBUSY;
3913
3914         txq = netdev_get_tx_queue(queue->card->dev, skb_get_queue_mapping(skb));
3915
3916         if (atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
3917                 /* If a TX completion happens right _here_ and misses to wake
3918                  * the txq, then our re-check below will catch the race.
3919                  */
3920                 QETH_TXQ_STAT_INC(queue, stopped);
3921                 netif_tx_stop_queue(txq);
3922                 stopped = true;
3923         }
3924
3925         qeth_fill_buffer(queue, buffer, skb, hdr, offset, hd_len, stopped);
3926         qeth_flush_buffers(queue, index, 1);
3927
3928         if (stopped && !qeth_out_queue_is_full(queue))
3929                 netif_tx_start_queue(txq);
3930         return 0;
3931 }
3932
3933 int qeth_do_send_packet(struct qeth_card *card, struct qeth_qdio_out_q *queue,
3934                         struct sk_buff *skb, struct qeth_hdr *hdr,
3935                         unsigned int offset, unsigned int hd_len,
3936                         int elements_needed)
3937 {
3938         struct qeth_qdio_out_buffer *buffer;
3939         struct netdev_queue *txq;
3940         bool stopped = false;
3941         int start_index;
3942         int flush_count = 0;
3943         int do_pack = 0;
3944         int tmp;
3945         int rc = 0;
3946
3947         /* spin until we get the queue ... */
3948         while (atomic_cmpxchg(&queue->state, QETH_OUT_Q_UNLOCKED,
3949                               QETH_OUT_Q_LOCKED) != QETH_OUT_Q_UNLOCKED);
3950         start_index = queue->next_buf_to_fill;
3951         buffer = queue->bufs[queue->next_buf_to_fill];
3952
3953         /* Just a sanity check, the wake/stop logic should ensure that we always
3954          * get a free buffer.
3955          */
3956         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY) {
3957                 atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
3958                 return -EBUSY;
3959         }
3960
3961         txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
3962
3963         /* check if we need to switch packing state of this queue */
3964         qeth_switch_to_packing_if_needed(queue);
3965         if (queue->do_pack) {
3966                 do_pack = 1;
3967                 /* does packet fit in current buffer? */
3968                 if (buffer->next_element_to_fill + elements_needed >
3969                     queue->max_elements) {
3970                         /* ... no -> set state PRIMED */
3971                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3972                         flush_count++;
3973                         queue->next_buf_to_fill =
3974                                 (queue->next_buf_to_fill + 1) %
3975                                 QDIO_MAX_BUFFERS_PER_Q;
3976                         buffer = queue->bufs[queue->next_buf_to_fill];
3977
3978                         /* We stepped forward, so sanity-check again: */
3979                         if (atomic_read(&buffer->state) !=
3980                             QETH_QDIO_BUF_EMPTY) {
3981                                 qeth_flush_buffers(queue, start_index,
3982                                                            flush_count);
3983                                 atomic_set(&queue->state,
3984                                                 QETH_OUT_Q_UNLOCKED);
3985                                 rc = -EBUSY;
3986                                 goto out;
3987                         }
3988                 }
3989         }
3990
3991         if (buffer->next_element_to_fill == 0 &&
3992             atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
3993                 /* If a TX completion happens right _here_ and misses to wake
3994                  * the txq, then our re-check below will catch the race.
3995                  */
3996                 QETH_TXQ_STAT_INC(queue, stopped);
3997                 netif_tx_stop_queue(txq);
3998                 stopped = true;
3999         }
4000
4001         flush_count += qeth_fill_buffer(queue, buffer, skb, hdr, offset, hd_len,
4002                                         stopped);
4003         if (flush_count)
4004                 qeth_flush_buffers(queue, start_index, flush_count);
4005         else if (!atomic_read(&queue->set_pci_flags_count))
4006                 atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH);
4007         /*
4008          * queue->state will go from LOCKED -> UNLOCKED or from
4009          * LOCKED_FLUSH -> LOCKED if output_handler wanted to 'notify' us
4010          * (switch packing state or flush buffer to get another pci flag out).
4011          * In that case we will enter this loop
4012          */
4013         while (atomic_dec_return(&queue->state)) {
4014                 start_index = queue->next_buf_to_fill;
4015                 /* check if we can go back to non-packing state */
4016                 tmp = qeth_switch_to_nonpacking_if_needed(queue);
4017                 /*
4018                  * check if we need to flush a packing buffer to get a pci
4019                  * flag out on the queue
4020                  */
4021                 if (!tmp && !atomic_read(&queue->set_pci_flags_count))
4022                         tmp = qeth_prep_flush_pack_buffer(queue);
4023                 if (tmp) {
4024                         qeth_flush_buffers(queue, start_index, tmp);
4025                         flush_count += tmp;
4026                 }
4027         }
4028 out:
4029         /* at this point the queue is UNLOCKED again */
4030         if (do_pack)
4031                 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_count);
4032
4033         if (stopped && !qeth_out_queue_is_full(queue))
4034                 netif_tx_start_queue(txq);
4035         return rc;
4036 }
4037 EXPORT_SYMBOL_GPL(qeth_do_send_packet);
4038
4039 static void qeth_fill_tso_ext(struct qeth_hdr_tso *hdr,
4040                               unsigned int payload_len, struct sk_buff *skb,
4041                               unsigned int proto_len)
4042 {
4043         struct qeth_hdr_ext_tso *ext = &hdr->ext;
4044
4045         ext->hdr_tot_len = sizeof(*ext);
4046         ext->imb_hdr_no = 1;
4047         ext->hdr_type = 1;
4048         ext->hdr_version = 1;
4049         ext->hdr_len = 28;
4050         ext->payload_len = payload_len;
4051         ext->mss = skb_shinfo(skb)->gso_size;
4052         ext->dg_hdr_len = proto_len;
4053 }
4054
4055 int qeth_xmit(struct qeth_card *card, struct sk_buff *skb,
4056               struct qeth_qdio_out_q *queue, int ipv, int cast_type,
4057               void (*fill_header)(struct qeth_qdio_out_q *queue,
4058                                   struct qeth_hdr *hdr, struct sk_buff *skb,
4059                                   int ipv, int cast_type,
4060                                   unsigned int data_len))
4061 {
4062         unsigned int proto_len, hw_hdr_len;
4063         unsigned int frame_len = skb->len;
4064         bool is_tso = skb_is_gso(skb);
4065         unsigned int data_offset = 0;
4066         struct qeth_hdr *hdr = NULL;
4067         unsigned int hd_len = 0;
4068         unsigned int elements;
4069         int push_len, rc;
4070         bool is_sg;
4071
4072         if (is_tso) {
4073                 hw_hdr_len = sizeof(struct qeth_hdr_tso);
4074                 proto_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
4075         } else {
4076                 hw_hdr_len = sizeof(struct qeth_hdr);
4077                 proto_len = (IS_IQD(card) && IS_LAYER2(card)) ? ETH_HLEN : 0;
4078         }
4079
4080         rc = skb_cow_head(skb, hw_hdr_len);
4081         if (rc)
4082                 return rc;
4083
4084         push_len = qeth_add_hw_header(queue, skb, &hdr, hw_hdr_len, proto_len,
4085                                       &elements);
4086         if (push_len < 0)
4087                 return push_len;
4088         if (is_tso || !push_len) {
4089                 /* HW header needs its own buffer element. */
4090                 hd_len = hw_hdr_len + proto_len;
4091                 data_offset = push_len + proto_len;
4092         }
4093         memset(hdr, 0, hw_hdr_len);
4094         fill_header(queue, hdr, skb, ipv, cast_type, frame_len);
4095         if (is_tso)
4096                 qeth_fill_tso_ext((struct qeth_hdr_tso *) hdr,
4097                                   frame_len - proto_len, skb, proto_len);
4098
4099         is_sg = skb_is_nonlinear(skb);
4100         if (IS_IQD(card)) {
4101                 rc = qeth_do_send_packet_fast(queue, skb, hdr, data_offset,
4102                                               hd_len);
4103         } else {
4104                 /* TODO: drop skb_orphan() once TX completion is fast enough */
4105                 skb_orphan(skb);
4106                 rc = qeth_do_send_packet(card, queue, skb, hdr, data_offset,
4107                                          hd_len, elements);
4108         }
4109
4110         if (!rc) {
4111                 QETH_TXQ_STAT_ADD(queue, buf_elements, elements);
4112                 if (is_sg)
4113                         QETH_TXQ_STAT_INC(queue, skbs_sg);
4114                 if (is_tso) {
4115                         QETH_TXQ_STAT_INC(queue, skbs_tso);
4116                         QETH_TXQ_STAT_ADD(queue, tso_bytes, frame_len);
4117                 }
4118         } else {
4119                 if (!push_len)
4120                         kmem_cache_free(qeth_core_header_cache, hdr);
4121         }
4122         return rc;
4123 }
4124 EXPORT_SYMBOL_GPL(qeth_xmit);
4125
4126 static int qeth_setadp_promisc_mode_cb(struct qeth_card *card,
4127                 struct qeth_reply *reply, unsigned long data)
4128 {
4129         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4130         struct qeth_ipacmd_setadpparms *setparms;
4131
4132         QETH_CARD_TEXT(card, 4, "prmadpcb");
4133
4134         setparms = &(cmd->data.setadapterparms);
4135         if (qeth_setadpparms_inspect_rc(cmd)) {
4136                 QETH_CARD_TEXT_(card, 4, "prmrc%x", cmd->hdr.return_code);
4137                 setparms->data.mode = SET_PROMISC_MODE_OFF;
4138         }
4139         card->info.promisc_mode = setparms->data.mode;
4140         return (cmd->hdr.return_code) ? -EIO : 0;
4141 }
4142
4143 void qeth_setadp_promisc_mode(struct qeth_card *card)
4144 {
4145         enum qeth_ipa_promisc_modes mode;
4146         struct net_device *dev = card->dev;
4147         struct qeth_cmd_buffer *iob;
4148         struct qeth_ipa_cmd *cmd;
4149
4150         QETH_CARD_TEXT(card, 4, "setprom");
4151
4152         if (((dev->flags & IFF_PROMISC) &&
4153              (card->info.promisc_mode == SET_PROMISC_MODE_ON)) ||
4154             (!(dev->flags & IFF_PROMISC) &&
4155              (card->info.promisc_mode == SET_PROMISC_MODE_OFF)))
4156                 return;
4157         mode = SET_PROMISC_MODE_OFF;
4158         if (dev->flags & IFF_PROMISC)
4159                 mode = SET_PROMISC_MODE_ON;
4160         QETH_CARD_TEXT_(card, 4, "mode:%x", mode);
4161
4162         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE,
4163                         sizeof(struct qeth_ipacmd_setadpparms_hdr) + 8);
4164         if (!iob)
4165                 return;
4166         cmd = __ipa_cmd(iob);
4167         cmd->data.setadapterparms.data.mode = mode;
4168         qeth_send_ipa_cmd(card, iob, qeth_setadp_promisc_mode_cb, NULL);
4169 }
4170 EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode);
4171
4172 static int qeth_setadpparms_change_macaddr_cb(struct qeth_card *card,
4173                 struct qeth_reply *reply, unsigned long data)
4174 {
4175         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4176         struct qeth_ipacmd_setadpparms *adp_cmd;
4177
4178         QETH_CARD_TEXT(card, 4, "chgmaccb");
4179         if (qeth_setadpparms_inspect_rc(cmd))
4180                 return -EIO;
4181
4182         adp_cmd = &cmd->data.setadapterparms;
4183         if (!is_valid_ether_addr(adp_cmd->data.change_addr.addr))
4184                 return -EADDRNOTAVAIL;
4185
4186         if (IS_LAYER2(card) && IS_OSD(card) && !IS_VM_NIC(card) &&
4187             !(adp_cmd->hdr.flags & QETH_SETADP_FLAGS_VIRTUAL_MAC))
4188                 return -EADDRNOTAVAIL;
4189
4190         ether_addr_copy(card->dev->dev_addr, adp_cmd->data.change_addr.addr);
4191         return 0;
4192 }
4193
4194 int qeth_setadpparms_change_macaddr(struct qeth_card *card)
4195 {
4196         int rc;
4197         struct qeth_cmd_buffer *iob;
4198         struct qeth_ipa_cmd *cmd;
4199
4200         QETH_CARD_TEXT(card, 4, "chgmac");
4201
4202         iob = qeth_get_adapter_cmd(card, IPA_SETADP_ALTER_MAC_ADDRESS,
4203                                    sizeof(struct qeth_ipacmd_setadpparms_hdr) +
4204                                    sizeof(struct qeth_change_addr));
4205         if (!iob)
4206                 return -ENOMEM;
4207         cmd = __ipa_cmd(iob);
4208         cmd->data.setadapterparms.data.change_addr.cmd = CHANGE_ADDR_READ_MAC;
4209         cmd->data.setadapterparms.data.change_addr.addr_size = ETH_ALEN;
4210         ether_addr_copy(cmd->data.setadapterparms.data.change_addr.addr,
4211                         card->dev->dev_addr);
4212         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_change_macaddr_cb,
4213                                NULL);
4214         return rc;
4215 }
4216 EXPORT_SYMBOL_GPL(qeth_setadpparms_change_macaddr);
4217
4218 static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card,
4219                 struct qeth_reply *reply, unsigned long data)
4220 {
4221         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4222         struct qeth_set_access_ctrl *access_ctrl_req;
4223         int fallback = *(int *)reply->param;
4224
4225         QETH_CARD_TEXT(card, 4, "setaccb");
4226         if (cmd->hdr.return_code)
4227                 return -EIO;
4228         qeth_setadpparms_inspect_rc(cmd);
4229
4230         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4231         QETH_DBF_TEXT_(SETUP, 2, "setaccb");
4232         QETH_DBF_TEXT_(SETUP, 2, "%s", card->gdev->dev.kobj.name);
4233         QETH_DBF_TEXT_(SETUP, 2, "rc=%d",
4234                 cmd->data.setadapterparms.hdr.return_code);
4235         if (cmd->data.setadapterparms.hdr.return_code !=
4236                                                 SET_ACCESS_CTRL_RC_SUCCESS)
4237                 QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%#x) on device %x: %#x\n",
4238                                  access_ctrl_req->subcmd_code, CARD_DEVID(card),
4239                                  cmd->data.setadapterparms.hdr.return_code);
4240         switch (cmd->data.setadapterparms.hdr.return_code) {
4241         case SET_ACCESS_CTRL_RC_SUCCESS:
4242                 if (card->options.isolation == ISOLATION_MODE_NONE) {
4243                         dev_info(&card->gdev->dev,
4244                             "QDIO data connection isolation is deactivated\n");
4245                 } else {
4246                         dev_info(&card->gdev->dev,
4247                             "QDIO data connection isolation is activated\n");
4248                 }
4249                 break;
4250         case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
4251                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already deactivated\n",
4252                                  CARD_DEVID(card));
4253                 if (fallback)
4254                         card->options.isolation = card->options.prev_isolation;
4255                 break;
4256         case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
4257                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already activated\n",
4258                                  CARD_DEVID(card));
4259                 if (fallback)
4260                         card->options.isolation = card->options.prev_isolation;
4261                 break;
4262         case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
4263                 dev_err(&card->gdev->dev, "Adapter does not "
4264                         "support QDIO data connection isolation\n");
4265                 break;
4266         case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
4267                 dev_err(&card->gdev->dev,
4268                         "Adapter is dedicated. "
4269                         "QDIO data connection isolation not supported\n");
4270                 if (fallback)
4271                         card->options.isolation = card->options.prev_isolation;
4272                 break;
4273         case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
4274                 dev_err(&card->gdev->dev,
4275                         "TSO does not permit QDIO data connection isolation\n");
4276                 if (fallback)
4277                         card->options.isolation = card->options.prev_isolation;
4278                 break;
4279         case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED:
4280                 dev_err(&card->gdev->dev, "The adjacent switch port does not "
4281                         "support reflective relay mode\n");
4282                 if (fallback)
4283                         card->options.isolation = card->options.prev_isolation;
4284                 break;
4285         case SET_ACCESS_CTRL_RC_REFLREL_FAILED:
4286                 dev_err(&card->gdev->dev, "The reflective relay mode cannot be "
4287                                         "enabled at the adjacent switch port");
4288                 if (fallback)
4289                         card->options.isolation = card->options.prev_isolation;
4290                 break;
4291         case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED:
4292                 dev_warn(&card->gdev->dev, "Turning off reflective relay mode "
4293                                         "at the adjacent switch failed\n");
4294                 break;
4295         default:
4296                 /* this should never happen */
4297                 if (fallback)
4298                         card->options.isolation = card->options.prev_isolation;
4299                 break;
4300         }
4301         return (cmd->hdr.return_code) ? -EIO : 0;
4302 }
4303
4304 static int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
4305                 enum qeth_ipa_isolation_modes isolation, int fallback)
4306 {
4307         int rc;
4308         struct qeth_cmd_buffer *iob;
4309         struct qeth_ipa_cmd *cmd;
4310         struct qeth_set_access_ctrl *access_ctrl_req;
4311
4312         QETH_CARD_TEXT(card, 4, "setacctl");
4313
4314         QETH_DBF_TEXT_(SETUP, 2, "setacctl");
4315         QETH_DBF_TEXT_(SETUP, 2, "%s", card->gdev->dev.kobj.name);
4316
4317         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL,
4318                                    sizeof(struct qeth_ipacmd_setadpparms_hdr) +
4319                                    sizeof(struct qeth_set_access_ctrl));
4320         if (!iob)
4321                 return -ENOMEM;
4322         cmd = __ipa_cmd(iob);
4323         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4324         access_ctrl_req->subcmd_code = isolation;
4325
4326         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb,
4327                                &fallback);
4328         QETH_DBF_TEXT_(SETUP, 2, "rc=%d", rc);
4329         return rc;
4330 }
4331
4332 int qeth_set_access_ctrl_online(struct qeth_card *card, int fallback)
4333 {
4334         int rc = 0;
4335
4336         QETH_CARD_TEXT(card, 4, "setactlo");
4337
4338         if ((IS_OSD(card) || IS_OSX(card)) &&
4339             qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) {
4340                 rc = qeth_setadpparms_set_access_ctrl(card,
4341                         card->options.isolation, fallback);
4342                 if (rc) {
4343                         QETH_DBF_MESSAGE(3, "IPA(SET_ACCESS_CTRL(%d) on device %x: sent failed\n",
4344                                          rc, CARD_DEVID(card));
4345                         rc = -EOPNOTSUPP;
4346                 }
4347         } else if (card->options.isolation != ISOLATION_MODE_NONE) {
4348                 card->options.isolation = ISOLATION_MODE_NONE;
4349
4350                 dev_err(&card->gdev->dev, "Adapter does not "
4351                         "support QDIO data connection isolation\n");
4352                 rc = -EOPNOTSUPP;
4353         }
4354         return rc;
4355 }
4356 EXPORT_SYMBOL_GPL(qeth_set_access_ctrl_online);
4357
4358 void qeth_tx_timeout(struct net_device *dev)
4359 {
4360         struct qeth_card *card;
4361
4362         card = dev->ml_priv;
4363         QETH_CARD_TEXT(card, 4, "txtimeo");
4364         qeth_schedule_recovery(card);
4365 }
4366 EXPORT_SYMBOL_GPL(qeth_tx_timeout);
4367
4368 static int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum)
4369 {
4370         struct qeth_card *card = dev->ml_priv;
4371         int rc = 0;
4372
4373         switch (regnum) {
4374         case MII_BMCR: /* Basic mode control register */
4375                 rc = BMCR_FULLDPLX;
4376                 if ((card->info.link_type != QETH_LINK_TYPE_GBIT_ETH) &&
4377                     (card->info.link_type != QETH_LINK_TYPE_OSN) &&
4378                     (card->info.link_type != QETH_LINK_TYPE_10GBIT_ETH) &&
4379                     (card->info.link_type != QETH_LINK_TYPE_25GBIT_ETH))
4380                         rc |= BMCR_SPEED100;
4381                 break;
4382         case MII_BMSR: /* Basic mode status register */
4383                 rc = BMSR_ERCAP | BMSR_ANEGCOMPLETE | BMSR_LSTATUS |
4384                      BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | BMSR_100FULL |
4385                      BMSR_100BASE4;
4386                 break;
4387         case MII_PHYSID1: /* PHYS ID 1 */
4388                 rc = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 8) |
4389                      dev->dev_addr[2];
4390                 rc = (rc >> 5) & 0xFFFF;
4391                 break;
4392         case MII_PHYSID2: /* PHYS ID 2 */
4393                 rc = (dev->dev_addr[2] << 10) & 0xFFFF;
4394                 break;
4395         case MII_ADVERTISE: /* Advertisement control reg */
4396                 rc = ADVERTISE_ALL;
4397                 break;
4398         case MII_LPA: /* Link partner ability reg */
4399                 rc = LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL |
4400                      LPA_100BASE4 | LPA_LPACK;
4401                 break;
4402         case MII_EXPANSION: /* Expansion register */
4403                 break;
4404         case MII_DCOUNTER: /* disconnect counter */
4405                 break;
4406         case MII_FCSCOUNTER: /* false carrier counter */
4407                 break;
4408         case MII_NWAYTEST: /* N-way auto-neg test register */
4409                 break;
4410         case MII_RERRCOUNTER: /* rx error counter */
4411                 rc = card->stats.rx_errors;
4412                 break;
4413         case MII_SREVISION: /* silicon revision */
4414                 break;
4415         case MII_RESV1: /* reserved 1 */
4416                 break;
4417         case MII_LBRERROR: /* loopback, rx, bypass error */
4418                 break;
4419         case MII_PHYADDR: /* physical address */
4420                 break;
4421         case MII_RESV2: /* reserved 2 */
4422                 break;
4423         case MII_TPISTATUS: /* TPI status for 10mbps */
4424                 break;
4425         case MII_NCONFIG: /* network interface config */
4426                 break;
4427         default:
4428                 break;
4429         }
4430         return rc;
4431 }
4432
4433 static int qeth_snmp_command_cb(struct qeth_card *card,
4434                 struct qeth_reply *reply, unsigned long sdata)
4435 {
4436         struct qeth_ipa_cmd *cmd;
4437         struct qeth_arp_query_info *qinfo;
4438         unsigned char *data;
4439         void *snmp_data;
4440         __u16 data_len;
4441
4442         QETH_CARD_TEXT(card, 3, "snpcmdcb");
4443
4444         cmd = (struct qeth_ipa_cmd *) sdata;
4445         data = (unsigned char *)((char *)cmd - reply->offset);
4446         qinfo = (struct qeth_arp_query_info *) reply->param;
4447
4448         if (cmd->hdr.return_code) {
4449                 QETH_CARD_TEXT_(card, 4, "scer1%x", cmd->hdr.return_code);
4450                 return -EIO;
4451         }
4452         if (cmd->data.setadapterparms.hdr.return_code) {
4453                 cmd->hdr.return_code =
4454                         cmd->data.setadapterparms.hdr.return_code;
4455                 QETH_CARD_TEXT_(card, 4, "scer2%x", cmd->hdr.return_code);
4456                 return -EIO;
4457         }
4458         data_len = *((__u16 *)QETH_IPA_PDU_LEN_PDU1(data));
4459         if (cmd->data.setadapterparms.hdr.seq_no == 1) {
4460                 snmp_data = &cmd->data.setadapterparms.data.snmp;
4461                 data_len -= offsetof(struct qeth_ipa_cmd,
4462                                      data.setadapterparms.data.snmp);
4463         } else {
4464                 snmp_data = &cmd->data.setadapterparms.data.snmp.request;
4465                 data_len -= offsetof(struct qeth_ipa_cmd,
4466                                      data.setadapterparms.data.snmp.request);
4467         }
4468
4469         /* check if there is enough room in userspace */
4470         if ((qinfo->udata_len - qinfo->udata_offset) < data_len) {
4471                 QETH_CARD_TEXT_(card, 4, "scer3%i", -ENOSPC);
4472                 return -ENOSPC;
4473         }
4474         QETH_CARD_TEXT_(card, 4, "snore%i",
4475                        cmd->data.setadapterparms.hdr.used_total);
4476         QETH_CARD_TEXT_(card, 4, "sseqn%i",
4477                 cmd->data.setadapterparms.hdr.seq_no);
4478         /*copy entries to user buffer*/
4479         memcpy(qinfo->udata + qinfo->udata_offset, snmp_data, data_len);
4480         qinfo->udata_offset += data_len;
4481
4482         /* check if all replies received ... */
4483                 QETH_CARD_TEXT_(card, 4, "srtot%i",
4484                                cmd->data.setadapterparms.hdr.used_total);
4485                 QETH_CARD_TEXT_(card, 4, "srseq%i",
4486                                cmd->data.setadapterparms.hdr.seq_no);
4487         if (cmd->data.setadapterparms.hdr.seq_no <
4488             cmd->data.setadapterparms.hdr.used_total)
4489                 return 1;
4490         return 0;
4491 }
4492
4493 static int qeth_snmp_command(struct qeth_card *card, char __user *udata)
4494 {
4495         struct qeth_cmd_buffer *iob;
4496         struct qeth_ipa_cmd *cmd;
4497         struct qeth_snmp_ureq *ureq;
4498         unsigned int req_len;
4499         struct qeth_arp_query_info qinfo = {0, };
4500         int rc = 0;
4501
4502         QETH_CARD_TEXT(card, 3, "snmpcmd");
4503
4504         if (IS_VM_NIC(card))
4505                 return -EOPNOTSUPP;
4506
4507         if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) &&
4508             IS_LAYER3(card))
4509                 return -EOPNOTSUPP;
4510
4511         /* skip 4 bytes (data_len struct member) to get req_len */
4512         if (copy_from_user(&req_len, udata + sizeof(int), sizeof(int)))
4513                 return -EFAULT;
4514         if (req_len > (QETH_BUFSIZE - IPA_PDU_HEADER_SIZE -
4515                        sizeof(struct qeth_ipacmd_hdr) -
4516                        sizeof(struct qeth_ipacmd_setadpparms_hdr)))
4517                 return -EINVAL;
4518         ureq = memdup_user(udata, req_len + sizeof(struct qeth_snmp_ureq_hdr));
4519         if (IS_ERR(ureq)) {
4520                 QETH_CARD_TEXT(card, 2, "snmpnome");
4521                 return PTR_ERR(ureq);
4522         }
4523         qinfo.udata_len = ureq->hdr.data_len;
4524         qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
4525         if (!qinfo.udata) {
4526                 kfree(ureq);
4527                 return -ENOMEM;
4528         }
4529         qinfo.udata_offset = sizeof(struct qeth_snmp_ureq_hdr);
4530
4531         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL,
4532                                    QETH_SNMP_SETADP_CMDLENGTH + req_len);
4533         if (!iob) {
4534                 rc = -ENOMEM;
4535                 goto out;
4536         }
4537
4538         /* for large requests, fix-up the length fields: */
4539         qeth_prepare_ipa_cmd(card, iob, QETH_SETADP_BASE_LEN + req_len);
4540
4541         cmd = __ipa_cmd(iob);
4542         memcpy(&cmd->data.setadapterparms.data.snmp, &ureq->cmd, req_len);
4543         rc = qeth_send_ipa_cmd(card, iob, qeth_snmp_command_cb, &qinfo);
4544         if (rc)
4545                 QETH_DBF_MESSAGE(2, "SNMP command failed on device %x: (%#x)\n",
4546                                  CARD_DEVID(card), rc);
4547         else {
4548                 if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
4549                         rc = -EFAULT;
4550         }
4551 out:
4552         kfree(ureq);
4553         kfree(qinfo.udata);
4554         return rc;
4555 }
4556
4557 static int qeth_setadpparms_query_oat_cb(struct qeth_card *card,
4558                 struct qeth_reply *reply, unsigned long data)
4559 {
4560         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4561         struct qeth_qoat_priv *priv;
4562         char *resdata;
4563         int resdatalen;
4564
4565         QETH_CARD_TEXT(card, 3, "qoatcb");
4566         if (qeth_setadpparms_inspect_rc(cmd))
4567                 return -EIO;
4568
4569         priv = (struct qeth_qoat_priv *)reply->param;
4570         resdatalen = cmd->data.setadapterparms.hdr.cmdlength;
4571         resdata = (char *)data + 28;
4572
4573         if (resdatalen > (priv->buffer_len - priv->response_len))
4574                 return -ENOSPC;
4575
4576         memcpy((priv->buffer + priv->response_len), resdata,
4577                 resdatalen);
4578         priv->response_len += resdatalen;
4579
4580         if (cmd->data.setadapterparms.hdr.seq_no <
4581             cmd->data.setadapterparms.hdr.used_total)
4582                 return 1;
4583         return 0;
4584 }
4585
4586 static int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
4587 {
4588         int rc = 0;
4589         struct qeth_cmd_buffer *iob;
4590         struct qeth_ipa_cmd *cmd;
4591         struct qeth_query_oat *oat_req;
4592         struct qeth_query_oat_data oat_data;
4593         struct qeth_qoat_priv priv;
4594         void __user *tmp;
4595
4596         QETH_CARD_TEXT(card, 3, "qoatcmd");
4597
4598         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT)) {
4599                 rc = -EOPNOTSUPP;
4600                 goto out;
4601         }
4602
4603         if (copy_from_user(&oat_data, udata,
4604             sizeof(struct qeth_query_oat_data))) {
4605                         rc = -EFAULT;
4606                         goto out;
4607         }
4608
4609         priv.buffer_len = oat_data.buffer_len;
4610         priv.response_len = 0;
4611         priv.buffer = vzalloc(oat_data.buffer_len);
4612         if (!priv.buffer) {
4613                 rc = -ENOMEM;
4614                 goto out;
4615         }
4616
4617         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4618                                    sizeof(struct qeth_ipacmd_setadpparms_hdr) +
4619                                    sizeof(struct qeth_query_oat));
4620         if (!iob) {
4621                 rc = -ENOMEM;
4622                 goto out_free;
4623         }
4624         cmd = __ipa_cmd(iob);
4625         oat_req = &cmd->data.setadapterparms.data.query_oat;
4626         oat_req->subcmd_code = oat_data.command;
4627
4628         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb,
4629                                &priv);
4630         if (!rc) {
4631                 if (is_compat_task())
4632                         tmp = compat_ptr(oat_data.ptr);
4633                 else
4634                         tmp = (void __user *)(unsigned long)oat_data.ptr;
4635
4636                 if (copy_to_user(tmp, priv.buffer,
4637                     priv.response_len)) {
4638                         rc = -EFAULT;
4639                         goto out_free;
4640                 }
4641
4642                 oat_data.response_len = priv.response_len;
4643
4644                 if (copy_to_user(udata, &oat_data,
4645                     sizeof(struct qeth_query_oat_data)))
4646                         rc = -EFAULT;
4647         }
4648
4649 out_free:
4650         vfree(priv.buffer);
4651 out:
4652         return rc;
4653 }
4654
4655 static int qeth_query_card_info_cb(struct qeth_card *card,
4656                                    struct qeth_reply *reply, unsigned long data)
4657 {
4658         struct carrier_info *carrier_info = (struct carrier_info *)reply->param;
4659         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4660         struct qeth_query_card_info *card_info;
4661
4662         QETH_CARD_TEXT(card, 2, "qcrdincb");
4663         if (qeth_setadpparms_inspect_rc(cmd))
4664                 return -EIO;
4665
4666         card_info = &cmd->data.setadapterparms.data.card_info;
4667         carrier_info->card_type = card_info->card_type;
4668         carrier_info->port_mode = card_info->port_mode;
4669         carrier_info->port_speed = card_info->port_speed;
4670         return 0;
4671 }
4672
4673 int qeth_query_card_info(struct qeth_card *card,
4674                          struct carrier_info *carrier_info)
4675 {
4676         struct qeth_cmd_buffer *iob;
4677
4678         QETH_CARD_TEXT(card, 2, "qcrdinfo");
4679         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_CARD_INFO))
4680                 return -EOPNOTSUPP;
4681         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_CARD_INFO,
4682                 sizeof(struct qeth_ipacmd_setadpparms_hdr));
4683         if (!iob)
4684                 return -ENOMEM;
4685         return qeth_send_ipa_cmd(card, iob, qeth_query_card_info_cb,
4686                                         (void *)carrier_info);
4687 }
4688
4689 /**
4690  * qeth_vm_request_mac() - Request a hypervisor-managed MAC address
4691  * @card: pointer to a qeth_card
4692  *
4693  * Returns
4694  *      0, if a MAC address has been set for the card's netdevice
4695  *      a return code, for various error conditions
4696  */
4697 int qeth_vm_request_mac(struct qeth_card *card)
4698 {
4699         struct diag26c_mac_resp *response;
4700         struct diag26c_mac_req *request;
4701         struct ccw_dev_id id;
4702         int rc;
4703
4704         QETH_DBF_TEXT(SETUP, 2, "vmreqmac");
4705
4706         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
4707         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
4708         if (!request || !response) {
4709                 rc = -ENOMEM;
4710                 goto out;
4711         }
4712
4713         ccw_device_get_id(CARD_DDEV(card), &id);
4714         request->resp_buf_len = sizeof(*response);
4715         request->resp_version = DIAG26C_VERSION2;
4716         request->op_code = DIAG26C_GET_MAC;
4717         request->devno = id.devno;
4718
4719         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4720         rc = diag26c(request, response, DIAG26C_MAC_SERVICES);
4721         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4722         if (rc)
4723                 goto out;
4724         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
4725
4726         if (request->resp_buf_len < sizeof(*response) ||
4727             response->version != request->resp_version) {
4728                 rc = -EIO;
4729                 QETH_DBF_TEXT(SETUP, 2, "badresp");
4730                 QETH_DBF_HEX(SETUP, 2, &request->resp_buf_len,
4731                              sizeof(request->resp_buf_len));
4732         } else if (!is_valid_ether_addr(response->mac)) {
4733                 rc = -EINVAL;
4734                 QETH_DBF_TEXT(SETUP, 2, "badmac");
4735                 QETH_DBF_HEX(SETUP, 2, response->mac, ETH_ALEN);
4736         } else {
4737                 ether_addr_copy(card->dev->dev_addr, response->mac);
4738         }
4739
4740 out:
4741         kfree(response);
4742         kfree(request);
4743         return rc;
4744 }
4745 EXPORT_SYMBOL_GPL(qeth_vm_request_mac);
4746
4747 static void qeth_determine_capabilities(struct qeth_card *card)
4748 {
4749         int rc;
4750         int length;
4751         char *prcd;
4752         struct ccw_device *ddev;
4753         int ddev_offline = 0;
4754
4755         QETH_DBF_TEXT(SETUP, 2, "detcapab");
4756         ddev = CARD_DDEV(card);
4757         if (!ddev->online) {
4758                 ddev_offline = 1;
4759                 rc = ccw_device_set_online(ddev);
4760                 if (rc) {
4761                         QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
4762                         goto out;
4763                 }
4764         }
4765
4766         rc = qeth_read_conf_data(card, (void **) &prcd, &length);
4767         if (rc) {
4768                 QETH_DBF_MESSAGE(2, "qeth_read_conf_data on device %x returned %i\n",
4769                                  CARD_DEVID(card), rc);
4770                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
4771                 goto out_offline;
4772         }
4773         qeth_configure_unitaddr(card, prcd);
4774         if (ddev_offline)
4775                 qeth_configure_blkt_default(card, prcd);
4776         kfree(prcd);
4777
4778         rc = qdio_get_ssqd_desc(ddev, &card->ssqd);
4779         if (rc)
4780                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
4781
4782         QETH_DBF_TEXT_(SETUP, 2, "qfmt%d", card->ssqd.qfmt);
4783         QETH_DBF_TEXT_(SETUP, 2, "ac1:%02x", card->ssqd.qdioac1);
4784         QETH_DBF_TEXT_(SETUP, 2, "ac2:%04x", card->ssqd.qdioac2);
4785         QETH_DBF_TEXT_(SETUP, 2, "ac3:%04x", card->ssqd.qdioac3);
4786         QETH_DBF_TEXT_(SETUP, 2, "icnt%d", card->ssqd.icnt);
4787         if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) ||
4788             ((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) ||
4789             ((card->ssqd.qdioac3 & CHSC_AC3_FORMAT2_CQ_AVAILABLE) == 0))) {
4790                 dev_info(&card->gdev->dev,
4791                         "Completion Queueing supported\n");
4792         } else {
4793                 card->options.cq = QETH_CQ_NOTAVAILABLE;
4794         }
4795
4796
4797 out_offline:
4798         if (ddev_offline == 1)
4799                 ccw_device_set_offline(ddev);
4800 out:
4801         return;
4802 }
4803
4804 static void qeth_qdio_establish_cq(struct qeth_card *card,
4805                                    struct qdio_buffer **in_sbal_ptrs,
4806                                    void (**queue_start_poll)
4807                                         (struct ccw_device *, int,
4808                                          unsigned long))
4809 {
4810         int i;
4811
4812         if (card->options.cq == QETH_CQ_ENABLED) {
4813                 int offset = QDIO_MAX_BUFFERS_PER_Q *
4814                              (card->qdio.no_in_queues - 1);
4815                 for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i) {
4816                         in_sbal_ptrs[offset + i] = (struct qdio_buffer *)
4817                                 virt_to_phys(card->qdio.c_q->bufs[i].buffer);
4818                 }
4819
4820                 queue_start_poll[card->qdio.no_in_queues - 1] = NULL;
4821         }
4822 }
4823
4824 static int qeth_qdio_establish(struct qeth_card *card)
4825 {
4826         struct qdio_initialize init_data;
4827         char *qib_param_field;
4828         struct qdio_buffer **in_sbal_ptrs;
4829         void (**queue_start_poll) (struct ccw_device *, int, unsigned long);
4830         struct qdio_buffer **out_sbal_ptrs;
4831         int i, j, k;
4832         int rc = 0;
4833
4834         QETH_DBF_TEXT(SETUP, 2, "qdioest");
4835
4836         qib_param_field = kzalloc(QDIO_MAX_BUFFERS_PER_Q,
4837                                   GFP_KERNEL);
4838         if (!qib_param_field) {
4839                 rc =  -ENOMEM;
4840                 goto out_free_nothing;
4841         }
4842
4843         qeth_create_qib_param_field(card, qib_param_field);
4844         qeth_create_qib_param_field_blkt(card, qib_param_field);
4845
4846         in_sbal_ptrs = kcalloc(card->qdio.no_in_queues * QDIO_MAX_BUFFERS_PER_Q,
4847                                sizeof(void *),
4848                                GFP_KERNEL);
4849         if (!in_sbal_ptrs) {
4850                 rc = -ENOMEM;
4851                 goto out_free_qib_param;
4852         }
4853         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i) {
4854                 in_sbal_ptrs[i] = (struct qdio_buffer *)
4855                         virt_to_phys(card->qdio.in_q->bufs[i].buffer);
4856         }
4857
4858         queue_start_poll = kcalloc(card->qdio.no_in_queues, sizeof(void *),
4859                                    GFP_KERNEL);
4860         if (!queue_start_poll) {
4861                 rc = -ENOMEM;
4862                 goto out_free_in_sbals;
4863         }
4864         for (i = 0; i < card->qdio.no_in_queues; ++i)
4865                 queue_start_poll[i] = qeth_qdio_start_poll;
4866
4867         qeth_qdio_establish_cq(card, in_sbal_ptrs, queue_start_poll);
4868
4869         out_sbal_ptrs =
4870                 kcalloc(card->qdio.no_out_queues * QDIO_MAX_BUFFERS_PER_Q,
4871                         sizeof(void *),
4872                         GFP_KERNEL);
4873         if (!out_sbal_ptrs) {
4874                 rc = -ENOMEM;
4875                 goto out_free_queue_start_poll;
4876         }
4877         for (i = 0, k = 0; i < card->qdio.no_out_queues; ++i)
4878                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j, ++k) {
4879                         out_sbal_ptrs[k] = (struct qdio_buffer *)virt_to_phys(
4880                                 card->qdio.out_qs[i]->bufs[j]->buffer);
4881                 }
4882
4883         memset(&init_data, 0, sizeof(struct qdio_initialize));
4884         init_data.cdev                   = CARD_DDEV(card);
4885         init_data.q_format               = IS_IQD(card) ? QDIO_IQDIO_QFMT :
4886                                                           QDIO_QETH_QFMT;
4887         init_data.qib_param_field_format = 0;
4888         init_data.qib_param_field        = qib_param_field;
4889         init_data.no_input_qs            = card->qdio.no_in_queues;
4890         init_data.no_output_qs           = card->qdio.no_out_queues;
4891         init_data.input_handler          = qeth_qdio_input_handler;
4892         init_data.output_handler         = qeth_qdio_output_handler;
4893         init_data.queue_start_poll_array = queue_start_poll;
4894         init_data.int_parm               = (unsigned long) card;
4895         init_data.input_sbal_addr_array  = in_sbal_ptrs;
4896         init_data.output_sbal_addr_array = out_sbal_ptrs;
4897         init_data.output_sbal_state_array = card->qdio.out_bufstates;
4898         init_data.scan_threshold         = IS_IQD(card) ? 1 : 32;
4899
4900         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED,
4901                 QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) {
4902                 rc = qdio_allocate(&init_data);
4903                 if (rc) {
4904                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
4905                         goto out;
4906                 }
4907                 rc = qdio_establish(&init_data);
4908                 if (rc) {
4909                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
4910                         qdio_free(CARD_DDEV(card));
4911                 }
4912         }
4913
4914         switch (card->options.cq) {
4915         case QETH_CQ_ENABLED:
4916                 dev_info(&card->gdev->dev, "Completion Queue support enabled");
4917                 break;
4918         case QETH_CQ_DISABLED:
4919                 dev_info(&card->gdev->dev, "Completion Queue support disabled");
4920                 break;
4921         default:
4922                 break;
4923         }
4924 out:
4925         kfree(out_sbal_ptrs);
4926 out_free_queue_start_poll:
4927         kfree(queue_start_poll);
4928 out_free_in_sbals:
4929         kfree(in_sbal_ptrs);
4930 out_free_qib_param:
4931         kfree(qib_param_field);
4932 out_free_nothing:
4933         return rc;
4934 }
4935
4936 static void qeth_core_free_card(struct qeth_card *card)
4937 {
4938         QETH_DBF_TEXT(SETUP, 2, "freecrd");
4939         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
4940         qeth_clean_channel(&card->read);
4941         qeth_clean_channel(&card->write);
4942         qeth_clean_channel(&card->data);
4943         destroy_workqueue(card->event_wq);
4944         qeth_free_qdio_queues(card);
4945         unregister_service_level(&card->qeth_service_level);
4946         dev_set_drvdata(&card->gdev->dev, NULL);
4947         kfree(card);
4948 }
4949
4950 void qeth_trace_features(struct qeth_card *card)
4951 {
4952         QETH_CARD_TEXT(card, 2, "features");
4953         QETH_CARD_HEX(card, 2, &card->options.ipa4, sizeof(card->options.ipa4));
4954         QETH_CARD_HEX(card, 2, &card->options.ipa6, sizeof(card->options.ipa6));
4955         QETH_CARD_HEX(card, 2, &card->options.adp, sizeof(card->options.adp));
4956         QETH_CARD_HEX(card, 2, &card->info.diagass_support,
4957                       sizeof(card->info.diagass_support));
4958 }
4959 EXPORT_SYMBOL_GPL(qeth_trace_features);
4960
4961 static struct ccw_device_id qeth_ids[] = {
4962         {CCW_DEVICE_DEVTYPE(0x1731, 0x01, 0x1732, 0x01),
4963                                         .driver_info = QETH_CARD_TYPE_OSD},
4964         {CCW_DEVICE_DEVTYPE(0x1731, 0x05, 0x1732, 0x05),
4965                                         .driver_info = QETH_CARD_TYPE_IQD},
4966         {CCW_DEVICE_DEVTYPE(0x1731, 0x06, 0x1732, 0x06),
4967                                         .driver_info = QETH_CARD_TYPE_OSN},
4968         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x03),
4969                                         .driver_info = QETH_CARD_TYPE_OSM},
4970         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x02),
4971                                         .driver_info = QETH_CARD_TYPE_OSX},
4972         {},
4973 };
4974 MODULE_DEVICE_TABLE(ccw, qeth_ids);
4975
4976 static struct ccw_driver qeth_ccw_driver = {
4977         .driver = {
4978                 .owner = THIS_MODULE,
4979                 .name = "qeth",
4980         },
4981         .ids = qeth_ids,
4982         .probe = ccwgroup_probe_ccwdev,
4983         .remove = ccwgroup_remove_ccwdev,
4984 };
4985
4986 int qeth_core_hardsetup_card(struct qeth_card *card, bool *carrier_ok)
4987 {
4988         int retries = 3;
4989         int rc;
4990
4991         QETH_DBF_TEXT(SETUP, 2, "hrdsetup");
4992         atomic_set(&card->force_alloc_skb, 0);
4993         rc = qeth_update_from_chp_desc(card);
4994         if (rc)
4995                 return rc;
4996 retry:
4997         if (retries < 3)
4998                 QETH_DBF_MESSAGE(2, "Retrying to do IDX activates on device %x.\n",
4999                                  CARD_DEVID(card));
5000         rc = qeth_qdio_clear_card(card, !IS_IQD(card));
5001         ccw_device_set_offline(CARD_DDEV(card));
5002         ccw_device_set_offline(CARD_WDEV(card));
5003         ccw_device_set_offline(CARD_RDEV(card));
5004         qdio_free(CARD_DDEV(card));
5005         rc = ccw_device_set_online(CARD_RDEV(card));
5006         if (rc)
5007                 goto retriable;
5008         rc = ccw_device_set_online(CARD_WDEV(card));
5009         if (rc)
5010                 goto retriable;
5011         rc = ccw_device_set_online(CARD_DDEV(card));
5012         if (rc)
5013                 goto retriable;
5014 retriable:
5015         if (rc == -ERESTARTSYS) {
5016                 QETH_DBF_TEXT(SETUP, 2, "break1");
5017                 return rc;
5018         } else if (rc) {
5019                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
5020                 if (--retries < 0)
5021                         goto out;
5022                 else
5023                         goto retry;
5024         }
5025         qeth_determine_capabilities(card);
5026         qeth_init_tokens(card);
5027         qeth_init_func_level(card);
5028
5029         rc = qeth_idx_activate_read_channel(card);
5030         if (rc == -EINTR) {
5031                 QETH_DBF_TEXT(SETUP, 2, "break2");
5032                 return rc;
5033         } else if (rc) {
5034                 QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
5035                 if (--retries < 0)
5036                         goto out;
5037                 else
5038                         goto retry;
5039         }
5040
5041         rc = qeth_idx_activate_write_channel(card);
5042         if (rc == -EINTR) {
5043                 QETH_DBF_TEXT(SETUP, 2, "break3");
5044                 return rc;
5045         } else if (rc) {
5046                 QETH_DBF_TEXT_(SETUP, 2, "4err%d", rc);
5047                 if (--retries < 0)
5048                         goto out;
5049                 else
5050                         goto retry;
5051         }
5052         card->read_or_write_problem = 0;
5053         rc = qeth_mpc_initialize(card);
5054         if (rc) {
5055                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
5056                 goto out;
5057         }
5058
5059         rc = qeth_send_startlan(card);
5060         if (rc) {
5061                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
5062                 if (rc == -ENETDOWN) {
5063                         dev_warn(&card->gdev->dev, "The LAN is offline\n");
5064                         *carrier_ok = false;
5065                 } else {
5066                         goto out;
5067                 }
5068         } else {
5069                 *carrier_ok = true;
5070         }
5071
5072         card->options.ipa4.supported_funcs = 0;
5073         card->options.ipa6.supported_funcs = 0;
5074         card->options.adp.supported_funcs = 0;
5075         card->options.sbp.supported_funcs = 0;
5076         card->info.diagass_support = 0;
5077         rc = qeth_query_ipassists(card, QETH_PROT_IPV4);
5078         if (rc == -ENOMEM)
5079                 goto out;
5080         if (qeth_is_supported(card, IPA_IPV6)) {
5081                 rc = qeth_query_ipassists(card, QETH_PROT_IPV6);
5082                 if (rc == -ENOMEM)
5083                         goto out;
5084         }
5085         if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
5086                 rc = qeth_query_setadapterparms(card);
5087                 if (rc < 0) {
5088                         QETH_DBF_TEXT_(SETUP, 2, "7err%d", rc);
5089                         goto out;
5090                 }
5091         }
5092         if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
5093                 rc = qeth_query_setdiagass(card);
5094                 if (rc < 0) {
5095                         QETH_DBF_TEXT_(SETUP, 2, "8err%d", rc);
5096                         goto out;
5097                 }
5098         }
5099         return 0;
5100 out:
5101         dev_warn(&card->gdev->dev, "The qeth device driver failed to recover "
5102                 "an error on the device\n");
5103         QETH_DBF_MESSAGE(2, "Initialization for device %x failed in hardsetup! rc=%d\n",
5104                          CARD_DEVID(card), rc);
5105         return rc;
5106 }
5107 EXPORT_SYMBOL_GPL(qeth_core_hardsetup_card);
5108
5109 static void qeth_create_skb_frag(struct qdio_buffer_element *element,
5110                                  struct sk_buff *skb, int offset, int data_len)
5111 {
5112         struct page *page = virt_to_page(element->addr);
5113         unsigned int next_frag;
5114
5115         /* first fill the linear space */
5116         if (!skb->len) {
5117                 unsigned int linear = min(data_len, skb_tailroom(skb));
5118
5119                 skb_put_data(skb, element->addr + offset, linear);
5120                 data_len -= linear;
5121                 if (!data_len)
5122                         return;
5123                 offset += linear;
5124                 /* fall through to add page frag for remaining data */
5125         }
5126
5127         next_frag = skb_shinfo(skb)->nr_frags;
5128         get_page(page);
5129         skb_add_rx_frag(skb, next_frag, page, offset, data_len, data_len);
5130 }
5131
5132 static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale)
5133 {
5134         return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY);
5135 }
5136
5137 struct sk_buff *qeth_core_get_next_skb(struct qeth_card *card,
5138                 struct qeth_qdio_buffer *qethbuffer,
5139                 struct qdio_buffer_element **__element, int *__offset,
5140                 struct qeth_hdr **hdr)
5141 {
5142         struct qdio_buffer_element *element = *__element;
5143         struct qdio_buffer *buffer = qethbuffer->buffer;
5144         int offset = *__offset;
5145         struct sk_buff *skb;
5146         int skb_len = 0;
5147         void *data_ptr;
5148         int data_len;
5149         int headroom = 0;
5150         int use_rx_sg = 0;
5151
5152         /* qeth_hdr must not cross element boundaries */
5153         while (element->length < offset + sizeof(struct qeth_hdr)) {
5154                 if (qeth_is_last_sbale(element))
5155                         return NULL;
5156                 element++;
5157                 offset = 0;
5158         }
5159         *hdr = element->addr + offset;
5160
5161         offset += sizeof(struct qeth_hdr);
5162         switch ((*hdr)->hdr.l2.id) {
5163         case QETH_HEADER_TYPE_LAYER2:
5164                 skb_len = (*hdr)->hdr.l2.pkt_length;
5165                 break;
5166         case QETH_HEADER_TYPE_LAYER3:
5167                 skb_len = (*hdr)->hdr.l3.length;
5168                 headroom = ETH_HLEN;
5169                 break;
5170         case QETH_HEADER_TYPE_OSN:
5171                 skb_len = (*hdr)->hdr.osn.pdu_length;
5172                 headroom = sizeof(struct qeth_hdr);
5173                 break;
5174         default:
5175                 break;
5176         }
5177
5178         if (!skb_len)
5179                 return NULL;
5180
5181         if (((skb_len >= card->options.rx_sg_cb) &&
5182              !IS_OSN(card) &&
5183              (!atomic_read(&card->force_alloc_skb))) ||
5184             (card->options.cq == QETH_CQ_ENABLED))
5185                 use_rx_sg = 1;
5186
5187         if (use_rx_sg && qethbuffer->rx_skb) {
5188                 /* QETH_CQ_ENABLED only: */
5189                 skb = qethbuffer->rx_skb;
5190                 qethbuffer->rx_skb = NULL;
5191         } else {
5192                 unsigned int linear = (use_rx_sg) ? QETH_RX_PULL_LEN : skb_len;
5193
5194                 skb = napi_alloc_skb(&card->napi, linear + headroom);
5195         }
5196         if (!skb)
5197                 goto no_mem;
5198         if (headroom)
5199                 skb_reserve(skb, headroom);
5200
5201         data_ptr = element->addr + offset;
5202         while (skb_len) {
5203                 data_len = min(skb_len, (int)(element->length - offset));
5204                 if (data_len) {
5205                         if (use_rx_sg)
5206                                 qeth_create_skb_frag(element, skb, offset,
5207                                                      data_len);
5208                         else
5209                                 skb_put_data(skb, data_ptr, data_len);
5210                 }
5211                 skb_len -= data_len;
5212                 if (skb_len) {
5213                         if (qeth_is_last_sbale(element)) {
5214                                 QETH_CARD_TEXT(card, 4, "unexeob");
5215                                 QETH_CARD_HEX(card, 2, buffer, sizeof(void *));
5216                                 dev_kfree_skb_any(skb);
5217                                 QETH_CARD_STAT_INC(card, rx_errors);
5218                                 return NULL;
5219                         }
5220                         element++;
5221                         offset = 0;
5222                         data_ptr = element->addr;
5223                 } else {
5224                         offset += data_len;
5225                 }
5226         }
5227         *__element = element;
5228         *__offset = offset;
5229         if (use_rx_sg) {
5230                 QETH_CARD_STAT_INC(card, rx_sg_skbs);
5231                 QETH_CARD_STAT_ADD(card, rx_sg_frags,
5232                                    skb_shinfo(skb)->nr_frags);
5233         }
5234         return skb;
5235 no_mem:
5236         if (net_ratelimit()) {
5237                 QETH_CARD_TEXT(card, 2, "noskbmem");
5238         }
5239         QETH_CARD_STAT_INC(card, rx_dropped);
5240         return NULL;
5241 }
5242 EXPORT_SYMBOL_GPL(qeth_core_get_next_skb);
5243
5244 int qeth_poll(struct napi_struct *napi, int budget)
5245 {
5246         struct qeth_card *card = container_of(napi, struct qeth_card, napi);
5247         int work_done = 0;
5248         struct qeth_qdio_buffer *buffer;
5249         int done;
5250         int new_budget = budget;
5251
5252         while (1) {
5253                 if (!card->rx.b_count) {
5254                         card->rx.qdio_err = 0;
5255                         card->rx.b_count = qdio_get_next_buffers(
5256                                 card->data.ccwdev, 0, &card->rx.b_index,
5257                                 &card->rx.qdio_err);
5258                         if (card->rx.b_count <= 0) {
5259                                 card->rx.b_count = 0;
5260                                 break;
5261                         }
5262                         card->rx.b_element =
5263                                 &card->qdio.in_q->bufs[card->rx.b_index]
5264                                 .buffer->element[0];
5265                         card->rx.e_offset = 0;
5266                 }
5267
5268                 while (card->rx.b_count) {
5269                         buffer = &card->qdio.in_q->bufs[card->rx.b_index];
5270                         if (!(card->rx.qdio_err &&
5271                             qeth_check_qdio_errors(card, buffer->buffer,
5272                             card->rx.qdio_err, "qinerr")))
5273                                 work_done +=
5274                                         card->discipline->process_rx_buffer(
5275                                                 card, new_budget, &done);
5276                         else
5277                                 done = 1;
5278
5279                         if (done) {
5280                                 QETH_CARD_STAT_INC(card, rx_bufs);
5281                                 qeth_put_buffer_pool_entry(card,
5282                                         buffer->pool_entry);
5283                                 qeth_queue_input_buffer(card, card->rx.b_index);
5284                                 card->rx.b_count--;
5285                                 if (card->rx.b_count) {
5286                                         card->rx.b_index =
5287                                                 (card->rx.b_index + 1) %
5288                                                 QDIO_MAX_BUFFERS_PER_Q;
5289                                         card->rx.b_element =
5290                                                 &card->qdio.in_q
5291                                                 ->bufs[card->rx.b_index]
5292                                                 .buffer->element[0];
5293                                         card->rx.e_offset = 0;
5294                                 }
5295                         }
5296
5297                         if (work_done >= budget)
5298                                 goto out;
5299                         else
5300                                 new_budget = budget - work_done;
5301                 }
5302         }
5303
5304         napi_complete_done(napi, work_done);
5305         if (qdio_start_irq(card->data.ccwdev, 0))
5306                 napi_schedule(&card->napi);
5307 out:
5308         return work_done;
5309 }
5310 EXPORT_SYMBOL_GPL(qeth_poll);
5311
5312 static int qeth_setassparms_inspect_rc(struct qeth_ipa_cmd *cmd)
5313 {
5314         if (!cmd->hdr.return_code)
5315                 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
5316         return cmd->hdr.return_code;
5317 }
5318
5319 static int qeth_setassparms_get_caps_cb(struct qeth_card *card,
5320                                         struct qeth_reply *reply,
5321                                         unsigned long data)
5322 {
5323         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5324         struct qeth_ipa_caps *caps = reply->param;
5325
5326         if (qeth_setassparms_inspect_rc(cmd))
5327                 return -EIO;
5328
5329         caps->supported = cmd->data.setassparms.data.caps.supported;
5330         caps->enabled = cmd->data.setassparms.data.caps.enabled;
5331         return 0;
5332 }
5333
5334 int qeth_setassparms_cb(struct qeth_card *card,
5335                         struct qeth_reply *reply, unsigned long data)
5336 {
5337         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5338
5339         QETH_CARD_TEXT(card, 4, "defadpcb");
5340
5341         if (cmd->hdr.return_code)
5342                 return -EIO;
5343
5344         cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
5345         if (cmd->hdr.prot_version == QETH_PROT_IPV4)
5346                 card->options.ipa4.enabled_funcs = cmd->hdr.ipa_enabled;
5347         if (cmd->hdr.prot_version == QETH_PROT_IPV6)
5348                 card->options.ipa6.enabled_funcs = cmd->hdr.ipa_enabled;
5349         return 0;
5350 }
5351 EXPORT_SYMBOL_GPL(qeth_setassparms_cb);
5352
5353 struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card,
5354                                                  enum qeth_ipa_funcs ipa_func,
5355                                                  __u16 cmd_code, __u16 len,
5356                                                  enum qeth_prot_versions prot)
5357 {
5358         struct qeth_cmd_buffer *iob;
5359         struct qeth_ipa_cmd *cmd;
5360
5361         QETH_CARD_TEXT(card, 4, "getasscm");
5362         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SETASSPARMS, prot);
5363
5364         if (iob) {
5365                 cmd = __ipa_cmd(iob);
5366                 cmd->data.setassparms.hdr.assist_no = ipa_func;
5367                 cmd->data.setassparms.hdr.length = 8 + len;
5368                 cmd->data.setassparms.hdr.command_code = cmd_code;
5369         }
5370
5371         return iob;
5372 }
5373 EXPORT_SYMBOL_GPL(qeth_get_setassparms_cmd);
5374
5375 int qeth_send_simple_setassparms_prot(struct qeth_card *card,
5376                                       enum qeth_ipa_funcs ipa_func,
5377                                       u16 cmd_code, long data,
5378                                       enum qeth_prot_versions prot)
5379 {
5380         int length = 0;
5381         struct qeth_cmd_buffer *iob;
5382
5383         QETH_CARD_TEXT_(card, 4, "simassp%i", prot);
5384         if (data)
5385                 length = sizeof(__u32);
5386         iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code, length, prot);
5387         if (!iob)
5388                 return -ENOMEM;
5389
5390         __ipa_cmd(iob)->data.setassparms.data.flags_32bit = (__u32) data;
5391         return qeth_send_ipa_cmd(card, iob, qeth_setassparms_cb, NULL);
5392 }
5393 EXPORT_SYMBOL_GPL(qeth_send_simple_setassparms_prot);
5394
5395 static void qeth_unregister_dbf_views(void)
5396 {
5397         int x;
5398         for (x = 0; x < QETH_DBF_INFOS; x++) {
5399                 debug_unregister(qeth_dbf[x].id);
5400                 qeth_dbf[x].id = NULL;
5401         }
5402 }
5403
5404 void qeth_dbf_longtext(debug_info_t *id, int level, char *fmt, ...)
5405 {
5406         char dbf_txt_buf[32];
5407         va_list args;
5408
5409         if (!debug_level_enabled(id, level))
5410                 return;
5411         va_start(args, fmt);
5412         vsnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
5413         va_end(args);
5414         debug_text_event(id, level, dbf_txt_buf);
5415 }
5416 EXPORT_SYMBOL_GPL(qeth_dbf_longtext);
5417
5418 static int qeth_register_dbf_views(void)
5419 {
5420         int ret;
5421         int x;
5422
5423         for (x = 0; x < QETH_DBF_INFOS; x++) {
5424                 /* register the areas */
5425                 qeth_dbf[x].id = debug_register(qeth_dbf[x].name,
5426                                                 qeth_dbf[x].pages,
5427                                                 qeth_dbf[x].areas,
5428                                                 qeth_dbf[x].len);
5429                 if (qeth_dbf[x].id == NULL) {
5430                         qeth_unregister_dbf_views();
5431                         return -ENOMEM;
5432                 }
5433
5434                 /* register a view */
5435                 ret = debug_register_view(qeth_dbf[x].id, qeth_dbf[x].view);
5436                 if (ret) {
5437                         qeth_unregister_dbf_views();
5438                         return ret;
5439                 }
5440
5441                 /* set a passing level */
5442                 debug_set_level(qeth_dbf[x].id, qeth_dbf[x].level);
5443         }
5444
5445         return 0;
5446 }
5447
5448 static DEFINE_MUTEX(qeth_mod_mutex);    /* for synchronized module loading */
5449
5450 int qeth_core_load_discipline(struct qeth_card *card,
5451                 enum qeth_discipline_id discipline)
5452 {
5453         mutex_lock(&qeth_mod_mutex);
5454         switch (discipline) {
5455         case QETH_DISCIPLINE_LAYER3:
5456                 card->discipline = try_then_request_module(
5457                         symbol_get(qeth_l3_discipline), "qeth_l3");
5458                 break;
5459         case QETH_DISCIPLINE_LAYER2:
5460                 card->discipline = try_then_request_module(
5461                         symbol_get(qeth_l2_discipline), "qeth_l2");
5462                 break;
5463         default:
5464                 break;
5465         }
5466         mutex_unlock(&qeth_mod_mutex);
5467
5468         if (!card->discipline) {
5469                 dev_err(&card->gdev->dev, "There is no kernel module to "
5470                         "support discipline %d\n", discipline);
5471                 return -EINVAL;
5472         }
5473
5474         card->options.layer = discipline;
5475         return 0;
5476 }
5477
5478 void qeth_core_free_discipline(struct qeth_card *card)
5479 {
5480         if (IS_LAYER2(card))
5481                 symbol_put(qeth_l2_discipline);
5482         else
5483                 symbol_put(qeth_l3_discipline);
5484         card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
5485         card->discipline = NULL;
5486 }
5487
5488 const struct device_type qeth_generic_devtype = {
5489         .name = "qeth_generic",
5490         .groups = qeth_generic_attr_groups,
5491 };
5492 EXPORT_SYMBOL_GPL(qeth_generic_devtype);
5493
5494 static const struct device_type qeth_osn_devtype = {
5495         .name = "qeth_osn",
5496         .groups = qeth_osn_attr_groups,
5497 };
5498
5499 #define DBF_NAME_LEN    20
5500
5501 struct qeth_dbf_entry {
5502         char dbf_name[DBF_NAME_LEN];
5503         debug_info_t *dbf_info;
5504         struct list_head dbf_list;
5505 };
5506
5507 static LIST_HEAD(qeth_dbf_list);
5508 static DEFINE_MUTEX(qeth_dbf_list_mutex);
5509
5510 static debug_info_t *qeth_get_dbf_entry(char *name)
5511 {
5512         struct qeth_dbf_entry *entry;
5513         debug_info_t *rc = NULL;
5514
5515         mutex_lock(&qeth_dbf_list_mutex);
5516         list_for_each_entry(entry, &qeth_dbf_list, dbf_list) {
5517                 if (strcmp(entry->dbf_name, name) == 0) {
5518                         rc = entry->dbf_info;
5519                         break;
5520                 }
5521         }
5522         mutex_unlock(&qeth_dbf_list_mutex);
5523         return rc;
5524 }
5525
5526 static int qeth_add_dbf_entry(struct qeth_card *card, char *name)
5527 {
5528         struct qeth_dbf_entry *new_entry;
5529
5530         card->debug = debug_register(name, 2, 1, 8);
5531         if (!card->debug) {
5532                 QETH_DBF_TEXT_(SETUP, 2, "%s", "qcdbf");
5533                 goto err;
5534         }
5535         if (debug_register_view(card->debug, &debug_hex_ascii_view))
5536                 goto err_dbg;
5537         new_entry = kzalloc(sizeof(struct qeth_dbf_entry), GFP_KERNEL);
5538         if (!new_entry)
5539                 goto err_dbg;
5540         strncpy(new_entry->dbf_name, name, DBF_NAME_LEN);
5541         new_entry->dbf_info = card->debug;
5542         mutex_lock(&qeth_dbf_list_mutex);
5543         list_add(&new_entry->dbf_list, &qeth_dbf_list);
5544         mutex_unlock(&qeth_dbf_list_mutex);
5545
5546         return 0;
5547
5548 err_dbg:
5549         debug_unregister(card->debug);
5550 err:
5551         return -ENOMEM;
5552 }
5553
5554 static void qeth_clear_dbf_list(void)
5555 {
5556         struct qeth_dbf_entry *entry, *tmp;
5557
5558         mutex_lock(&qeth_dbf_list_mutex);
5559         list_for_each_entry_safe(entry, tmp, &qeth_dbf_list, dbf_list) {
5560                 list_del(&entry->dbf_list);
5561                 debug_unregister(entry->dbf_info);
5562                 kfree(entry);
5563         }
5564         mutex_unlock(&qeth_dbf_list_mutex);
5565 }
5566
5567 static struct net_device *qeth_alloc_netdev(struct qeth_card *card)
5568 {
5569         struct net_device *dev;
5570
5571         switch (card->info.type) {
5572         case QETH_CARD_TYPE_IQD:
5573                 dev = alloc_netdev_mqs(0, "hsi%d", NET_NAME_UNKNOWN,
5574                                        ether_setup, QETH_MAX_QUEUES, 1);
5575                 break;
5576         case QETH_CARD_TYPE_OSM:
5577                 dev = alloc_etherdev(0);
5578                 break;
5579         case QETH_CARD_TYPE_OSN:
5580                 dev = alloc_netdev(0, "osn%d", NET_NAME_UNKNOWN, ether_setup);
5581                 break;
5582         default:
5583                 dev = alloc_etherdev_mqs(0, QETH_MAX_QUEUES, 1);
5584         }
5585
5586         if (!dev)
5587                 return NULL;
5588
5589         dev->ml_priv = card;
5590         dev->watchdog_timeo = QETH_TX_TIMEOUT;
5591         dev->min_mtu = IS_OSN(card) ? 64 : 576;
5592          /* initialized when device first goes online: */
5593         dev->max_mtu = 0;
5594         dev->mtu = 0;
5595         SET_NETDEV_DEV(dev, &card->gdev->dev);
5596         netif_carrier_off(dev);
5597
5598         if (IS_OSN(card)) {
5599                 dev->ethtool_ops = &qeth_osn_ethtool_ops;
5600         } else {
5601                 dev->ethtool_ops = &qeth_ethtool_ops;
5602                 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
5603                 dev->hw_features |= NETIF_F_SG;
5604                 dev->vlan_features |= NETIF_F_SG;
5605                 if (IS_IQD(card)) {
5606                         dev->features |= NETIF_F_SG;
5607                         if (netif_set_real_num_tx_queues(dev,
5608                                                          QETH_IQD_MIN_TXQ)) {
5609                                 free_netdev(dev);
5610                                 return NULL;
5611                         }
5612                 }
5613         }
5614
5615         return dev;
5616 }
5617
5618 struct net_device *qeth_clone_netdev(struct net_device *orig)
5619 {
5620         struct net_device *clone = qeth_alloc_netdev(orig->ml_priv);
5621
5622         if (!clone)
5623                 return NULL;
5624
5625         clone->dev_port = orig->dev_port;
5626         return clone;
5627 }
5628
5629 static int qeth_core_probe_device(struct ccwgroup_device *gdev)
5630 {
5631         struct qeth_card *card;
5632         struct device *dev;
5633         int rc;
5634         enum qeth_discipline_id enforced_disc;
5635         char dbf_name[DBF_NAME_LEN];
5636
5637         QETH_DBF_TEXT(SETUP, 2, "probedev");
5638
5639         dev = &gdev->dev;
5640         if (!get_device(dev))
5641                 return -ENODEV;
5642
5643         QETH_DBF_TEXT_(SETUP, 2, "%s", dev_name(&gdev->dev));
5644
5645         card = qeth_alloc_card(gdev);
5646         if (!card) {
5647                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM);
5648                 rc = -ENOMEM;
5649                 goto err_dev;
5650         }
5651
5652         snprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
5653                 dev_name(&gdev->dev));
5654         card->debug = qeth_get_dbf_entry(dbf_name);
5655         if (!card->debug) {
5656                 rc = qeth_add_dbf_entry(card, dbf_name);
5657                 if (rc)
5658                         goto err_card;
5659         }
5660
5661         qeth_setup_card(card);
5662         card->dev = qeth_alloc_netdev(card);
5663         if (!card->dev) {
5664                 rc = -ENOMEM;
5665                 goto err_card;
5666         }
5667
5668         card->qdio.no_out_queues = card->dev->num_tx_queues;
5669         rc = qeth_update_from_chp_desc(card);
5670         if (rc)
5671                 goto err_chp_desc;
5672         qeth_determine_capabilities(card);
5673         enforced_disc = qeth_enforce_discipline(card);
5674         switch (enforced_disc) {
5675         case QETH_DISCIPLINE_UNDETERMINED:
5676                 gdev->dev.type = &qeth_generic_devtype;
5677                 break;
5678         default:
5679                 card->info.layer_enforced = true;
5680                 rc = qeth_core_load_discipline(card, enforced_disc);
5681                 if (rc)
5682                         goto err_load;
5683
5684                 gdev->dev.type = IS_OSN(card) ? &qeth_osn_devtype :
5685                                                 card->discipline->devtype;
5686                 rc = card->discipline->setup(card->gdev);
5687                 if (rc)
5688                         goto err_disc;
5689                 break;
5690         }
5691
5692         return 0;
5693
5694 err_disc:
5695         qeth_core_free_discipline(card);
5696 err_load:
5697 err_chp_desc:
5698         free_netdev(card->dev);
5699 err_card:
5700         qeth_core_free_card(card);
5701 err_dev:
5702         put_device(dev);
5703         return rc;
5704 }
5705
5706 static void qeth_core_remove_device(struct ccwgroup_device *gdev)
5707 {
5708         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5709
5710         QETH_DBF_TEXT(SETUP, 2, "removedv");
5711
5712         if (card->discipline) {
5713                 card->discipline->remove(gdev);
5714                 qeth_core_free_discipline(card);
5715         }
5716
5717         free_netdev(card->dev);
5718         qeth_core_free_card(card);
5719         put_device(&gdev->dev);
5720 }
5721
5722 static int qeth_core_set_online(struct ccwgroup_device *gdev)
5723 {
5724         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5725         int rc = 0;
5726         enum qeth_discipline_id def_discipline;
5727
5728         if (!card->discipline) {
5729                 def_discipline = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
5730                                                 QETH_DISCIPLINE_LAYER2;
5731                 rc = qeth_core_load_discipline(card, def_discipline);
5732                 if (rc)
5733                         goto err;
5734                 rc = card->discipline->setup(card->gdev);
5735                 if (rc) {
5736                         qeth_core_free_discipline(card);
5737                         goto err;
5738                 }
5739         }
5740         rc = card->discipline->set_online(gdev);
5741 err:
5742         return rc;
5743 }
5744
5745 static int qeth_core_set_offline(struct ccwgroup_device *gdev)
5746 {
5747         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5748         return card->discipline->set_offline(gdev);
5749 }
5750
5751 static void qeth_core_shutdown(struct ccwgroup_device *gdev)
5752 {
5753         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5754         qeth_set_allowed_threads(card, 0, 1);
5755         if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
5756                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
5757         qeth_qdio_clear_card(card, 0);
5758         qeth_drain_output_queues(card);
5759         qdio_free(CARD_DDEV(card));
5760 }
5761
5762 static int qeth_core_freeze(struct ccwgroup_device *gdev)
5763 {
5764         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5765         if (card->discipline && card->discipline->freeze)
5766                 return card->discipline->freeze(gdev);
5767         return 0;
5768 }
5769
5770 static int qeth_core_thaw(struct ccwgroup_device *gdev)
5771 {
5772         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5773         if (card->discipline && card->discipline->thaw)
5774                 return card->discipline->thaw(gdev);
5775         return 0;
5776 }
5777
5778 static int qeth_core_restore(struct ccwgroup_device *gdev)
5779 {
5780         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5781         if (card->discipline && card->discipline->restore)
5782                 return card->discipline->restore(gdev);
5783         return 0;
5784 }
5785
5786 static ssize_t group_store(struct device_driver *ddrv, const char *buf,
5787                            size_t count)
5788 {
5789         int err;
5790
5791         err = ccwgroup_create_dev(qeth_core_root_dev, to_ccwgroupdrv(ddrv), 3,
5792                                   buf);
5793
5794         return err ? err : count;
5795 }
5796 static DRIVER_ATTR_WO(group);
5797
5798 static struct attribute *qeth_drv_attrs[] = {
5799         &driver_attr_group.attr,
5800         NULL,
5801 };
5802 static struct attribute_group qeth_drv_attr_group = {
5803         .attrs = qeth_drv_attrs,
5804 };
5805 static const struct attribute_group *qeth_drv_attr_groups[] = {
5806         &qeth_drv_attr_group,
5807         NULL,
5808 };
5809
5810 static struct ccwgroup_driver qeth_core_ccwgroup_driver = {
5811         .driver = {
5812                 .groups = qeth_drv_attr_groups,
5813                 .owner = THIS_MODULE,
5814                 .name = "qeth",
5815         },
5816         .ccw_driver = &qeth_ccw_driver,
5817         .setup = qeth_core_probe_device,
5818         .remove = qeth_core_remove_device,
5819         .set_online = qeth_core_set_online,
5820         .set_offline = qeth_core_set_offline,
5821         .shutdown = qeth_core_shutdown,
5822         .prepare = NULL,
5823         .complete = NULL,
5824         .freeze = qeth_core_freeze,
5825         .thaw = qeth_core_thaw,
5826         .restore = qeth_core_restore,
5827 };
5828
5829 struct qeth_card *qeth_get_card_by_busid(char *bus_id)
5830 {
5831         struct ccwgroup_device *gdev;
5832         struct qeth_card *card;
5833
5834         gdev = get_ccwgroupdev_by_busid(&qeth_core_ccwgroup_driver, bus_id);
5835         if (!gdev)
5836                 return NULL;
5837
5838         card = dev_get_drvdata(&gdev->dev);
5839         put_device(&gdev->dev);
5840         return card;
5841 }
5842 EXPORT_SYMBOL_GPL(qeth_get_card_by_busid);
5843
5844 int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
5845 {
5846         struct qeth_card *card = dev->ml_priv;
5847         struct mii_ioctl_data *mii_data;
5848         int rc = 0;
5849
5850         if (!card)
5851                 return -ENODEV;
5852
5853         switch (cmd) {
5854         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
5855                 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
5856                 break;
5857         case SIOC_QETH_GET_CARD_TYPE:
5858                 if ((IS_OSD(card) || IS_OSM(card) || IS_OSX(card)) &&
5859                     !IS_VM_NIC(card))
5860                         return 1;
5861                 return 0;
5862         case SIOCGMIIPHY:
5863                 mii_data = if_mii(rq);
5864                 mii_data->phy_id = 0;
5865                 break;
5866         case SIOCGMIIREG:
5867                 mii_data = if_mii(rq);
5868                 if (mii_data->phy_id != 0)
5869                         rc = -EINVAL;
5870                 else
5871                         mii_data->val_out = qeth_mdio_read(dev,
5872                                 mii_data->phy_id, mii_data->reg_num);
5873                 break;
5874         case SIOC_QETH_QUERY_OAT:
5875                 rc = qeth_query_oat_command(card, rq->ifr_ifru.ifru_data);
5876                 break;
5877         default:
5878                 if (card->discipline->do_ioctl)
5879                         rc = card->discipline->do_ioctl(dev, rq, cmd);
5880                 else
5881                         rc = -EOPNOTSUPP;
5882         }
5883         if (rc)
5884                 QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
5885         return rc;
5886 }
5887 EXPORT_SYMBOL_GPL(qeth_do_ioctl);
5888
5889 static int qeth_start_csum_cb(struct qeth_card *card, struct qeth_reply *reply,
5890                               unsigned long data)
5891 {
5892         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5893         u32 *features = reply->param;
5894
5895         if (qeth_setassparms_inspect_rc(cmd))
5896                 return -EIO;
5897
5898         *features = cmd->data.setassparms.data.flags_32bit;
5899         return 0;
5900 }
5901
5902 static int qeth_set_csum_off(struct qeth_card *card, enum qeth_ipa_funcs cstype,
5903                              enum qeth_prot_versions prot)
5904 {
5905         return qeth_send_simple_setassparms_prot(card, cstype,
5906                                                  IPA_CMD_ASS_STOP, 0, prot);
5907 }
5908
5909 static int qeth_set_csum_on(struct qeth_card *card, enum qeth_ipa_funcs cstype,
5910                             enum qeth_prot_versions prot)
5911 {
5912         u32 required_features = QETH_IPA_CHECKSUM_UDP | QETH_IPA_CHECKSUM_TCP;
5913         struct qeth_cmd_buffer *iob;
5914         struct qeth_ipa_caps caps;
5915         u32 features;
5916         int rc;
5917
5918         /* some L3 HW requires combined L3+L4 csum offload: */
5919         if (IS_LAYER3(card) && prot == QETH_PROT_IPV4 &&
5920             cstype == IPA_OUTBOUND_CHECKSUM)
5921                 required_features |= QETH_IPA_CHECKSUM_IP_HDR;
5922
5923         iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_START, 0,
5924                                        prot);
5925         if (!iob)
5926                 return -ENOMEM;
5927
5928         rc = qeth_send_ipa_cmd(card, iob, qeth_start_csum_cb, &features);
5929         if (rc)
5930                 return rc;
5931
5932         if ((required_features & features) != required_features) {
5933                 qeth_set_csum_off(card, cstype, prot);
5934                 return -EOPNOTSUPP;
5935         }
5936
5937         iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_ENABLE, 4,
5938                                        prot);
5939         if (!iob) {
5940                 qeth_set_csum_off(card, cstype, prot);
5941                 return -ENOMEM;
5942         }
5943
5944         if (features & QETH_IPA_CHECKSUM_LP2LP)
5945                 required_features |= QETH_IPA_CHECKSUM_LP2LP;
5946         __ipa_cmd(iob)->data.setassparms.data.flags_32bit = required_features;
5947         rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
5948         if (rc) {
5949                 qeth_set_csum_off(card, cstype, prot);
5950                 return rc;
5951         }
5952
5953         if (!qeth_ipa_caps_supported(&caps, required_features) ||
5954             !qeth_ipa_caps_enabled(&caps, required_features)) {
5955                 qeth_set_csum_off(card, cstype, prot);
5956                 return -EOPNOTSUPP;
5957         }
5958
5959         dev_info(&card->gdev->dev, "HW Checksumming (%sbound IPv%d) enabled\n",
5960                  cstype == IPA_INBOUND_CHECKSUM ? "in" : "out", prot);
5961         if (!qeth_ipa_caps_enabled(&caps, QETH_IPA_CHECKSUM_LP2LP) &&
5962             cstype == IPA_OUTBOUND_CHECKSUM)
5963                 dev_warn(&card->gdev->dev,
5964                          "Hardware checksumming is performed only if %s and its peer use different OSA Express 3 ports\n",
5965                          QETH_CARD_IFNAME(card));
5966         return 0;
5967 }
5968
5969 static int qeth_set_ipa_csum(struct qeth_card *card, bool on, int cstype,
5970                              enum qeth_prot_versions prot)
5971 {
5972         return on ? qeth_set_csum_on(card, cstype, prot) :
5973                     qeth_set_csum_off(card, cstype, prot);
5974 }
5975
5976 static int qeth_start_tso_cb(struct qeth_card *card, struct qeth_reply *reply,
5977                              unsigned long data)
5978 {
5979         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5980         struct qeth_tso_start_data *tso_data = reply->param;
5981
5982         if (qeth_setassparms_inspect_rc(cmd))
5983                 return -EIO;
5984
5985         tso_data->mss = cmd->data.setassparms.data.tso.mss;
5986         tso_data->supported = cmd->data.setassparms.data.tso.supported;
5987         return 0;
5988 }
5989
5990 static int qeth_set_tso_off(struct qeth_card *card,
5991                             enum qeth_prot_versions prot)
5992 {
5993         return qeth_send_simple_setassparms_prot(card, IPA_OUTBOUND_TSO,
5994                                                  IPA_CMD_ASS_STOP, 0, prot);
5995 }
5996
5997 static int qeth_set_tso_on(struct qeth_card *card,
5998                            enum qeth_prot_versions prot)
5999 {
6000         struct qeth_tso_start_data tso_data;
6001         struct qeth_cmd_buffer *iob;
6002         struct qeth_ipa_caps caps;
6003         int rc;
6004
6005         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6006                                        IPA_CMD_ASS_START, 0, prot);
6007         if (!iob)
6008                 return -ENOMEM;
6009
6010         rc = qeth_send_ipa_cmd(card, iob, qeth_start_tso_cb, &tso_data);
6011         if (rc)
6012                 return rc;
6013
6014         if (!tso_data.mss || !(tso_data.supported & QETH_IPA_LARGE_SEND_TCP)) {
6015                 qeth_set_tso_off(card, prot);
6016                 return -EOPNOTSUPP;
6017         }
6018
6019         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6020                                        IPA_CMD_ASS_ENABLE, sizeof(caps), prot);
6021         if (!iob) {
6022                 qeth_set_tso_off(card, prot);
6023                 return -ENOMEM;
6024         }
6025
6026         /* enable TSO capability */
6027         __ipa_cmd(iob)->data.setassparms.data.caps.enabled =
6028                 QETH_IPA_LARGE_SEND_TCP;
6029         rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6030         if (rc) {
6031                 qeth_set_tso_off(card, prot);
6032                 return rc;
6033         }
6034
6035         if (!qeth_ipa_caps_supported(&caps, QETH_IPA_LARGE_SEND_TCP) ||
6036             !qeth_ipa_caps_enabled(&caps, QETH_IPA_LARGE_SEND_TCP)) {
6037                 qeth_set_tso_off(card, prot);
6038                 return -EOPNOTSUPP;
6039         }
6040
6041         dev_info(&card->gdev->dev, "TSOv%u enabled (MSS: %u)\n", prot,
6042                  tso_data.mss);
6043         return 0;
6044 }
6045
6046 static int qeth_set_ipa_tso(struct qeth_card *card, bool on,
6047                             enum qeth_prot_versions prot)
6048 {
6049         return on ? qeth_set_tso_on(card, prot) : qeth_set_tso_off(card, prot);
6050 }
6051
6052 static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on)
6053 {
6054         int rc_ipv4 = (on) ? -EOPNOTSUPP : 0;
6055         int rc_ipv6;
6056
6057         if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
6058                 rc_ipv4 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6059                                             QETH_PROT_IPV4);
6060         if (!qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6061                 /* no/one Offload Assist available, so the rc is trivial */
6062                 return rc_ipv4;
6063
6064         rc_ipv6 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6065                                     QETH_PROT_IPV6);
6066
6067         if (on)
6068                 /* enable: success if any Assist is active */
6069                 return (rc_ipv6) ? rc_ipv4 : 0;
6070
6071         /* disable: failure if any Assist is still active */
6072         return (rc_ipv6) ? rc_ipv6 : rc_ipv4;
6073 }
6074
6075 /**
6076  * qeth_enable_hw_features() - (Re-)Enable HW functions for device features
6077  * @dev:        a net_device
6078  */
6079 void qeth_enable_hw_features(struct net_device *dev)
6080 {
6081         struct qeth_card *card = dev->ml_priv;
6082         netdev_features_t features;
6083
6084         features = dev->features;
6085         /* force-off any feature that might need an IPA sequence.
6086          * netdev_update_features() will restart them.
6087          */
6088         dev->features &= ~dev->hw_features;
6089         /* toggle VLAN filter, so that VIDs are re-programmed: */
6090         if (IS_LAYER2(card) && IS_VM_NIC(card)) {
6091                 dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
6092                 dev->wanted_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
6093         }
6094         netdev_update_features(dev);
6095         if (features != dev->features)
6096                 dev_warn(&card->gdev->dev,
6097                          "Device recovery failed to restore all offload features\n");
6098 }
6099 EXPORT_SYMBOL_GPL(qeth_enable_hw_features);
6100
6101 int qeth_set_features(struct net_device *dev, netdev_features_t features)
6102 {
6103         struct qeth_card *card = dev->ml_priv;
6104         netdev_features_t changed = dev->features ^ features;
6105         int rc = 0;
6106
6107         QETH_DBF_TEXT(SETUP, 2, "setfeat");
6108         QETH_DBF_HEX(SETUP, 2, &features, sizeof(features));
6109
6110         if ((changed & NETIF_F_IP_CSUM)) {
6111                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IP_CSUM,
6112                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV4);
6113                 if (rc)
6114                         changed ^= NETIF_F_IP_CSUM;
6115         }
6116         if (changed & NETIF_F_IPV6_CSUM) {
6117                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IPV6_CSUM,
6118                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV6);
6119                 if (rc)
6120                         changed ^= NETIF_F_IPV6_CSUM;
6121         }
6122         if (changed & NETIF_F_RXCSUM) {
6123                 rc = qeth_set_ipa_rx_csum(card, features & NETIF_F_RXCSUM);
6124                 if (rc)
6125                         changed ^= NETIF_F_RXCSUM;
6126         }
6127         if (changed & NETIF_F_TSO) {
6128                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO,
6129                                       QETH_PROT_IPV4);
6130                 if (rc)
6131                         changed ^= NETIF_F_TSO;
6132         }
6133         if (changed & NETIF_F_TSO6) {
6134                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO6,
6135                                       QETH_PROT_IPV6);
6136                 if (rc)
6137                         changed ^= NETIF_F_TSO6;
6138         }
6139
6140         /* everything changed successfully? */
6141         if ((dev->features ^ features) == changed)
6142                 return 0;
6143         /* something went wrong. save changed features and return error */
6144         dev->features ^= changed;
6145         return -EIO;
6146 }
6147 EXPORT_SYMBOL_GPL(qeth_set_features);
6148
6149 netdev_features_t qeth_fix_features(struct net_device *dev,
6150                                     netdev_features_t features)
6151 {
6152         struct qeth_card *card = dev->ml_priv;
6153
6154         QETH_DBF_TEXT(SETUP, 2, "fixfeat");
6155         if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM))
6156                 features &= ~NETIF_F_IP_CSUM;
6157         if (!qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6))
6158                 features &= ~NETIF_F_IPV6_CSUM;
6159         if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM) &&
6160             !qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6161                 features &= ~NETIF_F_RXCSUM;
6162         if (!qeth_is_supported(card, IPA_OUTBOUND_TSO))
6163                 features &= ~NETIF_F_TSO;
6164         if (!qeth_is_supported6(card, IPA_OUTBOUND_TSO))
6165                 features &= ~NETIF_F_TSO6;
6166
6167         QETH_DBF_HEX(SETUP, 2, &features, sizeof(features));
6168         return features;
6169 }
6170 EXPORT_SYMBOL_GPL(qeth_fix_features);
6171
6172 netdev_features_t qeth_features_check(struct sk_buff *skb,
6173                                       struct net_device *dev,
6174                                       netdev_features_t features)
6175 {
6176         /* GSO segmentation builds skbs with
6177          *      a (small) linear part for the headers, and
6178          *      page frags for the data.
6179          * Compared to a linear skb, the header-only part consumes an
6180          * additional buffer element. This reduces buffer utilization, and
6181          * hurts throughput. So compress small segments into one element.
6182          */
6183         if (netif_needs_gso(skb, features)) {
6184                 /* match skb_segment(): */
6185                 unsigned int doffset = skb->data - skb_mac_header(skb);
6186                 unsigned int hsize = skb_shinfo(skb)->gso_size;
6187                 unsigned int hroom = skb_headroom(skb);
6188
6189                 /* linearize only if resulting skb allocations are order-0: */
6190                 if (SKB_DATA_ALIGN(hroom + doffset + hsize) <= SKB_MAX_HEAD(0))
6191                         features &= ~NETIF_F_SG;
6192         }
6193
6194         return vlan_features_check(skb, features);
6195 }
6196 EXPORT_SYMBOL_GPL(qeth_features_check);
6197
6198 void qeth_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
6199 {
6200         struct qeth_card *card = dev->ml_priv;
6201         struct qeth_qdio_out_q *queue;
6202         unsigned int i;
6203
6204         QETH_CARD_TEXT(card, 5, "getstat");
6205
6206         stats->rx_packets = card->stats.rx_packets;
6207         stats->rx_bytes = card->stats.rx_bytes;
6208         stats->rx_errors = card->stats.rx_errors;
6209         stats->rx_dropped = card->stats.rx_dropped;
6210         stats->multicast = card->stats.rx_multicast;
6211
6212         for (i = 0; i < card->qdio.no_out_queues; i++) {
6213                 queue = card->qdio.out_qs[i];
6214
6215                 stats->tx_packets += queue->stats.tx_packets;
6216                 stats->tx_bytes += queue->stats.tx_bytes;
6217                 stats->tx_errors += queue->stats.tx_errors;
6218                 stats->tx_dropped += queue->stats.tx_dropped;
6219         }
6220 }
6221 EXPORT_SYMBOL_GPL(qeth_get_stats64);
6222
6223 u16 qeth_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
6224                           u8 cast_type, struct net_device *sb_dev)
6225 {
6226         if (cast_type != RTN_UNICAST)
6227                 return QETH_IQD_MCAST_TXQ;
6228         return QETH_IQD_MIN_UCAST_TXQ;
6229 }
6230 EXPORT_SYMBOL_GPL(qeth_iqd_select_queue);
6231
6232 int qeth_open(struct net_device *dev)
6233 {
6234         struct qeth_card *card = dev->ml_priv;
6235
6236         QETH_CARD_TEXT(card, 4, "qethopen");
6237
6238         if (qdio_stop_irq(CARD_DDEV(card), 0) < 0)
6239                 return -EIO;
6240
6241         card->data.state = CH_STATE_UP;
6242         netif_tx_start_all_queues(dev);
6243
6244         napi_enable(&card->napi);
6245         local_bh_disable();
6246         napi_schedule(&card->napi);
6247         /* kick-start the NAPI softirq: */
6248         local_bh_enable();
6249         return 0;
6250 }
6251 EXPORT_SYMBOL_GPL(qeth_open);
6252
6253 int qeth_stop(struct net_device *dev)
6254 {
6255         struct qeth_card *card = dev->ml_priv;
6256
6257         QETH_CARD_TEXT(card, 4, "qethstop");
6258         netif_tx_disable(dev);
6259         napi_disable(&card->napi);
6260         return 0;
6261 }
6262 EXPORT_SYMBOL_GPL(qeth_stop);
6263
6264 static int __init qeth_core_init(void)
6265 {
6266         int rc;
6267
6268         pr_info("loading core functions\n");
6269
6270         rc = qeth_register_dbf_views();
6271         if (rc)
6272                 goto dbf_err;
6273         qeth_core_root_dev = root_device_register("qeth");
6274         rc = PTR_ERR_OR_ZERO(qeth_core_root_dev);
6275         if (rc)
6276                 goto register_err;
6277         qeth_core_header_cache =
6278                 kmem_cache_create("qeth_hdr", QETH_HDR_CACHE_OBJ_SIZE,
6279                                   roundup_pow_of_two(QETH_HDR_CACHE_OBJ_SIZE),
6280                                   0, NULL);
6281         if (!qeth_core_header_cache) {
6282                 rc = -ENOMEM;
6283                 goto slab_err;
6284         }
6285         qeth_qdio_outbuf_cache = kmem_cache_create("qeth_buf",
6286                         sizeof(struct qeth_qdio_out_buffer), 0, 0, NULL);
6287         if (!qeth_qdio_outbuf_cache) {
6288                 rc = -ENOMEM;
6289                 goto cqslab_err;
6290         }
6291         rc = ccw_driver_register(&qeth_ccw_driver);
6292         if (rc)
6293                 goto ccw_err;
6294         rc = ccwgroup_driver_register(&qeth_core_ccwgroup_driver);
6295         if (rc)
6296                 goto ccwgroup_err;
6297
6298         return 0;
6299
6300 ccwgroup_err:
6301         ccw_driver_unregister(&qeth_ccw_driver);
6302 ccw_err:
6303         kmem_cache_destroy(qeth_qdio_outbuf_cache);
6304 cqslab_err:
6305         kmem_cache_destroy(qeth_core_header_cache);
6306 slab_err:
6307         root_device_unregister(qeth_core_root_dev);
6308 register_err:
6309         qeth_unregister_dbf_views();
6310 dbf_err:
6311         pr_err("Initializing the qeth device driver failed\n");
6312         return rc;
6313 }
6314
6315 static void __exit qeth_core_exit(void)
6316 {
6317         qeth_clear_dbf_list();
6318         ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver);
6319         ccw_driver_unregister(&qeth_ccw_driver);
6320         kmem_cache_destroy(qeth_qdio_outbuf_cache);
6321         kmem_cache_destroy(qeth_core_header_cache);
6322         root_device_unregister(qeth_core_root_dev);
6323         qeth_unregister_dbf_views();
6324         pr_info("core functions removed\n");
6325 }
6326
6327 module_init(qeth_core_init);
6328 module_exit(qeth_core_exit);
6329 MODULE_AUTHOR("Frank Blaschka <[email protected]>");
6330 MODULE_DESCRIPTION("qeth core functions");
6331 MODULE_LICENSE("GPL");