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 <utz.bacher@de.ibm.com>,
   5  *               Frank Pavlic <fpavlic@de.ibm.com>,
   6  *               Thomas Spatzier <tspat@de.ibm.com>,
   7  *               Frank Blaschka <frank.blaschka@de.ibm.com>
   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_send_control_data_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_buffers(struct qeth_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 (card->info.guestlan) {
  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 (card->info.guestlan) {
 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         qeth_setup_ccw(channel->ccw, CCW_CMD_READ, QETH_BUFSIZE, iob->data);
 515         QETH_CARD_TEXT(card, 6, "noirqpnd");
 516         rc = ccw_device_start(channel->ccwdev, channel->ccw,
 517                               (addr_t) iob, 0, 0);
 518         if (rc) {
 519                 QETH_DBF_MESSAGE(2, "error %i on device %x when starting next read ccw!\n",
 520                                  rc, CARD_DEVID(card));
 521                 atomic_set(&channel->irq_pending, 0);
 522                 qeth_release_buffer(channel, iob);
 523                 card->read_or_write_problem = 1;
 524                 qeth_schedule_recovery(card);
 525                 wake_up(&card->wait_q);
 526         }
 527         return rc;
 528 }
 529
 530 static int qeth_issue_next_read(struct qeth_card *card)
 531 {
 532         int ret;
 533
 534         spin_lock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 535         ret = __qeth_issue_next_read(card);
 536         spin_unlock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 537
 538         return ret;
 539 }
 540
 541 static struct qeth_reply *qeth_alloc_reply(struct qeth_card *card)
 542 {
 543         struct qeth_reply *reply;
 544
 545         reply = kzalloc(sizeof(struct qeth_reply), GFP_ATOMIC);
 546         if (reply) {
 547                 refcount_set(&reply->refcnt, 1);
 548                 atomic_set(&reply->received, 0);
 549                 init_waitqueue_head(&reply->wait_q);
 550         }
 551         return reply;
 552 }
 553
 554 static void qeth_get_reply(struct qeth_reply *reply)
 555 {
 556         refcount_inc(&reply->refcnt);
 557 }
 558
 559 static void qeth_put_reply(struct qeth_reply *reply)
 560 {
 561         if (refcount_dec_and_test(&reply->refcnt))
 562                 kfree(reply);
 563 }
 564
 565 static void qeth_enqueue_reply(struct qeth_card *card, struct qeth_reply *reply)
 566 {
 567         spin_lock_irq(&card->lock);
 568         list_add_tail(&reply->list, &card->cmd_waiter_list);
 569         spin_unlock_irq(&card->lock);
 570 }
 571
 572 static void qeth_dequeue_reply(struct qeth_card *card, struct qeth_reply *reply)
 573 {
 574         spin_lock_irq(&card->lock);
 575         list_del(&reply->list);
 576         spin_unlock_irq(&card->lock);
 577 }
 578
 579 static void qeth_notify_reply(struct qeth_reply *reply)
 580 {
 581         atomic_inc(&reply->received);
 582         wake_up(&reply->wait_q);
 583 }
 584
 585 static void qeth_issue_ipa_msg(struct qeth_ipa_cmd *cmd, int rc,
 586                 struct qeth_card *card)
 587 {
 588         const char *ipa_name;
 589         int com = cmd->hdr.command;
 590         ipa_name = qeth_get_ipa_cmd_name(com);
 591
 592         if (rc)
 593                 QETH_DBF_MESSAGE(2, "IPA: %s(%#x) for device %x returned %#x \"%s\"\n",
 594                                  ipa_name, com, CARD_DEVID(card), rc,
 595                                  qeth_get_ipa_msg(rc));
 596         else
 597                 QETH_DBF_MESSAGE(5, "IPA: %s(%#x) for device %x succeeded\n",
 598                                  ipa_name, com, CARD_DEVID(card));
 599 }
 600
 601 static struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card,
 602                                                 struct qeth_ipa_cmd *cmd)
 603 {
 604         QETH_CARD_TEXT(card, 5, "chkipad");
 605
 606         if (IS_IPA_REPLY(cmd)) {
 607                 if (cmd->hdr.command != IPA_CMD_SETCCID &&
 608                     cmd->hdr.command != IPA_CMD_DELCCID &&
 609                     cmd->hdr.command != IPA_CMD_MODCCID &&
 610                     cmd->hdr.command != IPA_CMD_SET_DIAG_ASS)
 611                         qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
 612                 return cmd;
 613         }
 614
 615         /* handle unsolicited event: */
 616         switch (cmd->hdr.command) {
 617         case IPA_CMD_STOPLAN:
 618                 if (cmd->hdr.return_code == IPA_RC_VEPA_TO_VEB_TRANSITION) {
 619                         dev_err(&card->gdev->dev,
 620                                 "Interface %s is down because the adjacent port is no longer in reflective relay mode\n",
 621                                 QETH_CARD_IFNAME(card));
 622                         schedule_work(&card->close_dev_work);
 623                 } else {
 624                         dev_warn(&card->gdev->dev,
 625                                  "The link for interface %s on CHPID 0x%X failed\n",
 626                                  QETH_CARD_IFNAME(card), card->info.chpid);
 627                         qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
 628                         netif_carrier_off(card->dev);
 629                 }
 630                 return NULL;
 631         case IPA_CMD_STARTLAN:
 632                 dev_info(&card->gdev->dev,
 633                          "The link for %s on CHPID 0x%X has been restored\n",
 634                          QETH_CARD_IFNAME(card), card->info.chpid);
 635                 if (card->info.hwtrap)
 636                         card->info.hwtrap = 2;
 637                 qeth_schedule_recovery(card);
 638                 return NULL;
 639         case IPA_CMD_SETBRIDGEPORT_IQD:
 640         case IPA_CMD_SETBRIDGEPORT_OSA:
 641         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
 642                 if (card->discipline->control_event_handler(card, cmd))
 643                         return cmd;
 644                 return NULL;
 645         case IPA_CMD_MODCCID:
 646                 return cmd;
 647         case IPA_CMD_REGISTER_LOCAL_ADDR:
 648                 QETH_CARD_TEXT(card, 3, "irla");
 649                 return NULL;
 650         case IPA_CMD_UNREGISTER_LOCAL_ADDR:
 651                 QETH_CARD_TEXT(card, 3, "urla");
 652                 return NULL;
 653         default:
 654                 QETH_DBF_MESSAGE(2, "Received data is IPA but not a reply!\n");
 655                 return cmd;
 656         }
 657 }
 658
 659 void qeth_clear_ipacmd_list(struct qeth_card *card)
 660 {
 661         struct qeth_reply *reply;
 662         unsigned long flags;
 663
 664         QETH_CARD_TEXT(card, 4, "clipalst");
 665
 666         spin_lock_irqsave(&card->lock, flags);
 667         list_for_each_entry(reply, &card->cmd_waiter_list, list) {
 668                 reply->rc = -EIO;
 669                 qeth_notify_reply(reply);
 670         }
 671         spin_unlock_irqrestore(&card->lock, flags);
 672 }
 673 EXPORT_SYMBOL_GPL(qeth_clear_ipacmd_list);
 674
 675 static int qeth_check_idx_response(struct qeth_card *card,
 676         unsigned char *buffer)
 677 {
 678         if (!buffer)
 679                 return 0;
 680
 681         QETH_DBF_HEX(CTRL, 2, buffer, QETH_DBF_CTRL_LEN);
 682         if ((buffer[2] & 0xc0) == 0xc0) {
 683                 QETH_DBF_MESSAGE(2, "received an IDX TERMINATE with cause code %#04x\n",
 684                                  buffer[4]);
 685                 QETH_CARD_TEXT(card, 2, "ckidxres");
 686                 QETH_CARD_TEXT(card, 2, " idxterm");
 687                 QETH_CARD_TEXT_(card, 2, "  rc%d", -EIO);
 688                 if (buffer[4] == 0xf6) {
 689                         dev_err(&card->gdev->dev,
 690                         "The qeth device is not configured "
 691                         "for the OSI layer required by z/VM\n");
 692                         return -EPERM;
 693                 }
 694                 return -EIO;
 695         }
 696         return 0;
 697 }
 698
 699 static struct qeth_cmd_buffer *__qeth_get_buffer(struct qeth_channel *channel)
 700 {
 701         __u8 index;
 702
 703         index = channel->io_buf_no;
 704         do {
 705                 if (channel->iob[index].state == BUF_STATE_FREE) {
 706                         channel->iob[index].state = BUF_STATE_LOCKED;
 707                         channel->io_buf_no = (channel->io_buf_no + 1) %
 708                                 QETH_CMD_BUFFER_NO;
 709                         memset(channel->iob[index].data, 0, QETH_BUFSIZE);
 710                         return channel->iob + index;
 711                 }
 712                 index = (index + 1) % QETH_CMD_BUFFER_NO;
 713         } while (index != channel->io_buf_no);
 714
 715         return NULL;
 716 }
 717
 718 void qeth_release_buffer(struct qeth_channel *channel,
 719                 struct qeth_cmd_buffer *iob)
 720 {
 721         unsigned long flags;
 722
 723         spin_lock_irqsave(&channel->iob_lock, flags);
 724         iob->state = BUF_STATE_FREE;
 725         iob->callback = qeth_send_control_data_cb;
 726         if (iob->reply) {
 727                 qeth_put_reply(iob->reply);
 728                 iob->reply = NULL;
 729         }
 730         spin_unlock_irqrestore(&channel->iob_lock, flags);
 731         wake_up(&channel->wait_q);
 732 }
 733 EXPORT_SYMBOL_GPL(qeth_release_buffer);
 734
 735 static void qeth_release_buffer_cb(struct qeth_card *card,
 736                                    struct qeth_channel *channel,
 737                                    struct qeth_cmd_buffer *iob)
 738 {
 739         qeth_release_buffer(channel, iob);
 740 }
 741
 742 static void qeth_cancel_cmd(struct qeth_cmd_buffer *iob, int rc)
 743 {
 744         struct qeth_reply *reply = iob->reply;
 745
 746         if (reply) {
 747                 reply->rc = rc;
 748                 qeth_notify_reply(reply);
 749         }
 750         qeth_release_buffer(iob->channel, iob);
 751 }
 752
 753 static struct qeth_cmd_buffer *qeth_get_buffer(struct qeth_channel *channel)
 754 {
 755         struct qeth_cmd_buffer *buffer = NULL;
 756         unsigned long flags;
 757
 758         spin_lock_irqsave(&channel->iob_lock, flags);
 759         buffer = __qeth_get_buffer(channel);
 760         spin_unlock_irqrestore(&channel->iob_lock, flags);
 761         return buffer;
 762 }
 763
 764 struct qeth_cmd_buffer *qeth_wait_for_buffer(struct qeth_channel *channel)
 765 {
 766         struct qeth_cmd_buffer *buffer;
 767         wait_event(channel->wait_q,
 768                    ((buffer = qeth_get_buffer(channel)) != NULL));
 769         return buffer;
 770 }
 771 EXPORT_SYMBOL_GPL(qeth_wait_for_buffer);
 772
 773 void qeth_clear_cmd_buffers(struct qeth_channel *channel)
 774 {
 775         int cnt;
 776
 777         for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++)
 778                 qeth_release_buffer(channel, &channel->iob[cnt]);
 779         channel->io_buf_no = 0;
 780 }
 781 EXPORT_SYMBOL_GPL(qeth_clear_cmd_buffers);
 782
 783 static void qeth_send_control_data_cb(struct qeth_card *card,
 784                                       struct qeth_channel *channel,
 785                                       struct qeth_cmd_buffer *iob)
 786 {
 787         struct qeth_ipa_cmd *cmd = NULL;
 788         struct qeth_reply *reply = NULL;
 789         struct qeth_reply *r;
 790         unsigned long flags;
 791         int rc = 0;
 792
 793         QETH_CARD_TEXT(card, 4, "sndctlcb");
 794         rc = qeth_check_idx_response(card, iob->data);
 795         switch (rc) {
 796         case 0:
 797                 break;
 798         case -EIO:
 799                 qeth_clear_ipacmd_list(card);
 800                 qeth_schedule_recovery(card);
 801                 /* fall through */
 802         default:
 803                 goto out;
 804         }
 805
 806         if (IS_IPA(iob->data)) {
 807                 cmd = (struct qeth_ipa_cmd *) PDU_ENCAPSULATION(iob->data);
 808                 cmd = qeth_check_ipa_data(card, cmd);
 809                 if (!cmd)
 810                         goto out;
 811                 if (IS_OSN(card) && card->osn_info.assist_cb &&
 812                     cmd->hdr.command != IPA_CMD_STARTLAN) {
 813                         card->osn_info.assist_cb(card->dev, cmd);
 814                         goto out;
 815                 }
 816         } else {
 817                 /* non-IPA commands should only flow during initialization */
 818                 if (card->state != CARD_STATE_DOWN)
 819                         goto out;
 820         }
 821
 822         /* match against pending cmd requests */
 823         spin_lock_irqsave(&card->lock, flags);
 824         list_for_each_entry(r, &card->cmd_waiter_list, list) {
 825                 if ((r->seqno == QETH_IDX_COMMAND_SEQNO) ||
 826                     (cmd && (r->seqno == cmd->hdr.seqno))) {
 827                         reply = r;
 828                         /* take the object outside the lock */
 829                         qeth_get_reply(reply);
 830                         break;
 831                 }
 832         }
 833         spin_unlock_irqrestore(&card->lock, flags);
 834
 835         if (!reply)
 836                 goto out;
 837
 838         if (!reply->callback) {
 839                 rc = 0;
 840         } else {
 841                 if (cmd) {
 842                         reply->offset = (u16)((char *)cmd - (char *)iob->data);
 843                         rc = reply->callback(card, reply, (unsigned long)cmd);
 844                 } else {
 845                         rc = reply->callback(card, reply, (unsigned long)iob);
 846                 }
 847         }
 848
 849         if (rc <= 0) {
 850                 reply->rc = rc;
 851                 qeth_notify_reply(reply);
 852         }
 853
 854         qeth_put_reply(reply);
 855
 856 out:
 857         memcpy(&card->seqno.pdu_hdr_ack,
 858                 QETH_PDU_HEADER_SEQ_NO(iob->data),
 859                 QETH_SEQ_NO_LENGTH);
 860         qeth_release_buffer(channel, iob);
 861 }
 862
 863 static int qeth_set_thread_start_bit(struct qeth_card *card,
 864                 unsigned long thread)
 865 {
 866         unsigned long flags;
 867
 868         spin_lock_irqsave(&card->thread_mask_lock, flags);
 869         if (!(card->thread_allowed_mask & thread) ||
 870               (card->thread_start_mask & thread)) {
 871                 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 872                 return -EPERM;
 873         }
 874         card->thread_start_mask |= thread;
 875         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 876         return 0;
 877 }
 878
 879 void qeth_clear_thread_start_bit(struct qeth_card *card, unsigned long thread)
 880 {
 881         unsigned long flags;
 882
 883         spin_lock_irqsave(&card->thread_mask_lock, flags);
 884         card->thread_start_mask &= ~thread;
 885         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 886         wake_up(&card->wait_q);
 887 }
 888 EXPORT_SYMBOL_GPL(qeth_clear_thread_start_bit);
 889
 890 void qeth_clear_thread_running_bit(struct qeth_card *card, unsigned long thread)
 891 {
 892         unsigned long flags;
 893
 894         spin_lock_irqsave(&card->thread_mask_lock, flags);
 895         card->thread_running_mask &= ~thread;
 896         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 897         wake_up_all(&card->wait_q);
 898 }
 899 EXPORT_SYMBOL_GPL(qeth_clear_thread_running_bit);
 900
 901 static int __qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
 902 {
 903         unsigned long flags;
 904         int rc = 0;
 905
 906         spin_lock_irqsave(&card->thread_mask_lock, flags);
 907         if (card->thread_start_mask & thread) {
 908                 if ((card->thread_allowed_mask & thread) &&
 909                     !(card->thread_running_mask & thread)) {
 910                         rc = 1;
 911                         card->thread_start_mask &= ~thread;
 912                         card->thread_running_mask |= thread;
 913                 } else
 914                         rc = -EPERM;
 915         }
 916         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 917         return rc;
 918 }
 919
 920 int qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
 921 {
 922         int rc = 0;
 923
 924         wait_event(card->wait_q,
 925                    (rc = __qeth_do_run_thread(card, thread)) >= 0);
 926         return rc;
 927 }
 928 EXPORT_SYMBOL_GPL(qeth_do_run_thread);
 929
 930 void qeth_schedule_recovery(struct qeth_card *card)
 931 {
 932         QETH_CARD_TEXT(card, 2, "startrec");
 933         if (qeth_set_thread_start_bit(card, QETH_RECOVER_THREAD) == 0)
 934                 schedule_work(&card->kernel_thread_starter);
 935 }
 936 EXPORT_SYMBOL_GPL(qeth_schedule_recovery);
 937
 938 static int qeth_get_problem(struct qeth_card *card, struct ccw_device *cdev,
 939                             struct irb *irb)
 940 {
 941         int dstat, cstat;
 942         char *sense;
 943
 944         sense = (char *) irb->ecw;
 945         cstat = irb->scsw.cmd.cstat;
 946         dstat = irb->scsw.cmd.dstat;
 947
 948         if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK |
 949                      SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK |
 950                      SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) {
 951                 QETH_CARD_TEXT(card, 2, "CGENCHK");
 952                 dev_warn(&cdev->dev, "The qeth device driver "
 953                         "failed to recover an error on the device\n");
 954                 QETH_DBF_MESSAGE(2, "check on channel %x with dstat=%#x, cstat=%#x\n",
 955                                  CCW_DEVID(cdev), dstat, cstat);
 956                 print_hex_dump(KERN_WARNING, "qeth: irb ", DUMP_PREFIX_OFFSET,
 957                                 16, 1, irb, 64, 1);
 958                 return 1;
 959         }
 960
 961         if (dstat & DEV_STAT_UNIT_CHECK) {
 962                 if (sense[SENSE_RESETTING_EVENT_BYTE] &
 963                     SENSE_RESETTING_EVENT_FLAG) {
 964                         QETH_CARD_TEXT(card, 2, "REVIND");
 965                         return 1;
 966                 }
 967                 if (sense[SENSE_COMMAND_REJECT_BYTE] &
 968                     SENSE_COMMAND_REJECT_FLAG) {
 969                         QETH_CARD_TEXT(card, 2, "CMDREJi");
 970                         return 1;
 971                 }
 972                 if ((sense[2] == 0xaf) && (sense[3] == 0xfe)) {
 973                         QETH_CARD_TEXT(card, 2, "AFFE");
 974                         return 1;
 975                 }
 976                 if ((!sense[0]) && (!sense[1]) && (!sense[2]) && (!sense[3])) {
 977                         QETH_CARD_TEXT(card, 2, "ZEROSEN");
 978                         return 0;
 979                 }
 980                 QETH_CARD_TEXT(card, 2, "DGENCHK");
 981                         return 1;
 982         }
 983         return 0;
 984 }
 985
 986 static int qeth_check_irb_error(struct qeth_card *card, struct ccw_device *cdev,
 987                                 unsigned long intparm, struct irb *irb)
 988 {
 989         if (!IS_ERR(irb))
 990                 return 0;
 991
 992         switch (PTR_ERR(irb)) {
 993         case -EIO:
 994                 QETH_DBF_MESSAGE(2, "i/o-error on channel %x\n",
 995                                  CCW_DEVID(cdev));
 996                 QETH_CARD_TEXT(card, 2, "ckirberr");
 997                 QETH_CARD_TEXT_(card, 2, "  rc%d", -EIO);
 998                 return -EIO;
 999         case -ETIMEDOUT:
1000                 dev_warn(&cdev->dev, "A hardware operation timed out"
1001                         " on the device\n");
1002                 QETH_CARD_TEXT(card, 2, "ckirberr");
1003                 QETH_CARD_TEXT_(card, 2, "  rc%d", -ETIMEDOUT);
1004                 if (intparm == QETH_RCD_PARM) {
1005                         if (card->data.ccwdev == cdev) {
1006                                 card->data.state = CH_STATE_DOWN;
1007                                 wake_up(&card->wait_q);
1008                         }
1009                 }
1010                 return -ETIMEDOUT;
1011         default:
1012                 QETH_DBF_MESSAGE(2, "unknown error %ld on channel %x\n",
1013                                  PTR_ERR(irb), CCW_DEVID(cdev));
1014                 QETH_CARD_TEXT(card, 2, "ckirberr");
1015                 QETH_CARD_TEXT(card, 2, "  rc???");
1016                 return PTR_ERR(irb);
1017         }
1018 }
1019
1020 static void qeth_irq(struct ccw_device *cdev, unsigned long intparm,
1021                 struct irb *irb)
1022 {
1023         int rc;
1024         int cstat, dstat;
1025         struct qeth_cmd_buffer *iob = NULL;
1026         struct ccwgroup_device *gdev;
1027         struct qeth_channel *channel;
1028         struct qeth_card *card;
1029
1030         /* while we hold the ccwdev lock, this stays valid: */
1031         gdev = dev_get_drvdata(&cdev->dev);
1032         card = dev_get_drvdata(&gdev->dev);
1033         if (!card)
1034                 return;
1035
1036         QETH_CARD_TEXT(card, 5, "irq");
1037
1038         if (card->read.ccwdev == cdev) {
1039                 channel = &card->read;
1040                 QETH_CARD_TEXT(card, 5, "read");
1041         } else if (card->write.ccwdev == cdev) {
1042                 channel = &card->write;
1043                 QETH_CARD_TEXT(card, 5, "write");
1044         } else {
1045                 channel = &card->data;
1046                 QETH_CARD_TEXT(card, 5, "data");
1047         }
1048
1049         if (qeth_intparm_is_iob(intparm))
1050                 iob = (struct qeth_cmd_buffer *) __va((addr_t)intparm);
1051
1052         rc = qeth_check_irb_error(card, cdev, intparm, irb);
1053         if (rc) {
1054                 /* IO was terminated, free its resources. */
1055                 if (iob)
1056                         qeth_cancel_cmd(iob, rc);
1057                 atomic_set(&channel->irq_pending, 0);
1058                 wake_up(&card->wait_q);
1059                 return;
1060         }
1061
1062         atomic_set(&channel->irq_pending, 0);
1063
1064         if (irb->scsw.cmd.fctl & (SCSW_FCTL_CLEAR_FUNC))
1065                 channel->state = CH_STATE_STOPPED;
1066
1067         if (irb->scsw.cmd.fctl & (SCSW_FCTL_HALT_FUNC))
1068                 channel->state = CH_STATE_HALTED;
1069
1070         /*let's wake up immediately on data channel*/
1071         if ((channel == &card->data) && (intparm != 0) &&
1072             (intparm != QETH_RCD_PARM))
1073                 goto out;
1074
1075         if (intparm == QETH_CLEAR_CHANNEL_PARM) {
1076                 QETH_CARD_TEXT(card, 6, "clrchpar");
1077                 /* we don't have to handle this further */
1078                 intparm = 0;
1079         }
1080         if (intparm == QETH_HALT_CHANNEL_PARM) {
1081                 QETH_CARD_TEXT(card, 6, "hltchpar");
1082                 /* we don't have to handle this further */
1083                 intparm = 0;
1084         }
1085
1086         cstat = irb->scsw.cmd.cstat;
1087         dstat = irb->scsw.cmd.dstat;
1088
1089         if ((dstat & DEV_STAT_UNIT_EXCEP) ||
1090             (dstat & DEV_STAT_UNIT_CHECK) ||
1091             (cstat)) {
1092                 if (irb->esw.esw0.erw.cons) {
1093                         dev_warn(&channel->ccwdev->dev,
1094                                 "The qeth device driver failed to recover "
1095                                 "an error on the device\n");
1096                         QETH_DBF_MESSAGE(2, "sense data available on channel %x: cstat %#X dstat %#X\n",
1097                                          CCW_DEVID(channel->ccwdev), cstat,
1098                                          dstat);
1099                         print_hex_dump(KERN_WARNING, "qeth: irb ",
1100                                 DUMP_PREFIX_OFFSET, 16, 1, irb, 32, 1);
1101                         print_hex_dump(KERN_WARNING, "qeth: sense data ",
1102                                 DUMP_PREFIX_OFFSET, 16, 1, irb->ecw, 32, 1);
1103                 }
1104                 if (intparm == QETH_RCD_PARM) {
1105                         channel->state = CH_STATE_DOWN;
1106                         goto out;
1107                 }
1108                 rc = qeth_get_problem(card, cdev, irb);
1109                 if (rc) {
1110                         card->read_or_write_problem = 1;
1111                         if (iob)
1112                                 qeth_cancel_cmd(iob, rc);
1113                         qeth_clear_ipacmd_list(card);
1114                         qeth_schedule_recovery(card);
1115                         goto out;
1116                 }
1117         }
1118
1119         if (intparm == QETH_RCD_PARM) {
1120                 channel->state = CH_STATE_RCD_DONE;
1121                 goto out;
1122         }
1123         if (channel == &card->data)
1124                 return;
1125         if (channel == &card->read &&
1126             channel->state == CH_STATE_UP)
1127                 __qeth_issue_next_read(card);
1128
1129         if (iob && iob->callback)
1130                 iob->callback(card, iob->channel, iob);
1131
1132 out:
1133         wake_up(&card->wait_q);
1134         return;
1135 }
1136
1137 static void qeth_notify_skbs(struct qeth_qdio_out_q *q,
1138                 struct qeth_qdio_out_buffer *buf,
1139                 enum iucv_tx_notify notification)
1140 {
1141         struct sk_buff *skb;
1142
1143         skb_queue_walk(&buf->skb_list, skb) {
1144                 QETH_CARD_TEXT_(q->card, 5, "skbn%d", notification);
1145                 QETH_CARD_TEXT_(q->card, 5, "%lx", (long) skb);
1146                 if (skb->protocol == htons(ETH_P_AF_IUCV) && skb->sk)
1147                         iucv_sk(skb->sk)->sk_txnotify(skb, notification);
1148         }
1149 }
1150
1151 static void qeth_release_skbs(struct qeth_qdio_out_buffer *buf)
1152 {
1153         /* release may never happen from within CQ tasklet scope */
1154         WARN_ON_ONCE(atomic_read(&buf->state) == QETH_QDIO_BUF_IN_CQ);
1155
1156         if (atomic_read(&buf->state) == QETH_QDIO_BUF_PENDING)
1157                 qeth_notify_skbs(buf->q, buf, TX_NOTIFY_GENERALERROR);
1158
1159         __skb_queue_purge(&buf->skb_list);
1160 }
1161
1162 static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
1163                                      struct qeth_qdio_out_buffer *buf)
1164 {
1165         int i;
1166
1167         /* is PCI flag set on buffer? */
1168         if (buf->buffer->element[0].sflags & SBAL_SFLAGS0_PCI_REQ)
1169                 atomic_dec(&queue->set_pci_flags_count);
1170
1171         qeth_release_skbs(buf);
1172
1173         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(queue->card); ++i) {
1174                 if (buf->buffer->element[i].addr && buf->is_header[i])
1175                         kmem_cache_free(qeth_core_header_cache,
1176                                 buf->buffer->element[i].addr);
1177                 buf->is_header[i] = 0;
1178         }
1179
1180         qeth_scrub_qdio_buffer(buf->buffer,
1181                                QETH_MAX_BUFFER_ELEMENTS(queue->card));
1182         buf->next_element_to_fill = 0;
1183         atomic_set(&buf->state, QETH_QDIO_BUF_EMPTY);
1184 }
1185
1186 static void qeth_clear_outq_buffers(struct qeth_qdio_out_q *q, int free)
1187 {
1188         int j;
1189
1190         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
1191                 if (!q->bufs[j])
1192                         continue;
1193                 qeth_cleanup_handled_pending(q, j, 1);
1194                 qeth_clear_output_buffer(q, q->bufs[j]);
1195                 if (free) {
1196                         kmem_cache_free(qeth_qdio_outbuf_cache, q->bufs[j]);
1197                         q->bufs[j] = NULL;
1198                 }
1199         }
1200 }
1201
1202 void qeth_clear_qdio_buffers(struct qeth_card *card)
1203 {
1204         int i;
1205
1206         QETH_CARD_TEXT(card, 2, "clearqdbf");
1207         /* clear outbound buffers to free skbs */
1208         for (i = 0; i < card->qdio.no_out_queues; ++i) {
1209                 if (card->qdio.out_qs[i]) {
1210                         qeth_clear_outq_buffers(card->qdio.out_qs[i], 0);
1211                 }
1212         }
1213 }
1214 EXPORT_SYMBOL_GPL(qeth_clear_qdio_buffers);
1215
1216 static void qeth_free_buffer_pool(struct qeth_card *card)
1217 {
1218         struct qeth_buffer_pool_entry *pool_entry, *tmp;
1219         int i = 0;
1220         list_for_each_entry_safe(pool_entry, tmp,
1221                                  &card->qdio.init_pool.entry_list, init_list){
1222                 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i)
1223                         free_page((unsigned long)pool_entry->elements[i]);
1224                 list_del(&pool_entry->init_list);
1225                 kfree(pool_entry);
1226         }
1227 }
1228
1229 static void qeth_clean_channel(struct qeth_channel *channel)
1230 {
1231         struct ccw_device *cdev = channel->ccwdev;
1232         int cnt;
1233
1234         QETH_DBF_TEXT(SETUP, 2, "freech");
1235
1236         spin_lock_irq(get_ccwdev_lock(cdev));
1237         cdev->handler = NULL;
1238         spin_unlock_irq(get_ccwdev_lock(cdev));
1239
1240         for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++)
1241                 kfree(channel->iob[cnt].data);
1242         kfree(channel->ccw);
1243 }
1244
1245 static int qeth_setup_channel(struct qeth_channel *channel, bool alloc_buffers)
1246 {
1247         struct ccw_device *cdev = channel->ccwdev;
1248         int cnt;
1249
1250         QETH_DBF_TEXT(SETUP, 2, "setupch");
1251
1252         channel->ccw = kmalloc(sizeof(struct ccw1), GFP_KERNEL | GFP_DMA);
1253         if (!channel->ccw)
1254                 return -ENOMEM;
1255         channel->state = CH_STATE_DOWN;
1256         atomic_set(&channel->irq_pending, 0);
1257         init_waitqueue_head(&channel->wait_q);
1258
1259         spin_lock_irq(get_ccwdev_lock(cdev));
1260         cdev->handler = qeth_irq;
1261         spin_unlock_irq(get_ccwdev_lock(cdev));
1262
1263         if (!alloc_buffers)
1264                 return 0;
1265
1266         for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++) {
1267                 channel->iob[cnt].data = kmalloc(QETH_BUFSIZE,
1268                                                  GFP_KERNEL | GFP_DMA);
1269                 if (channel->iob[cnt].data == NULL)
1270                         break;
1271                 channel->iob[cnt].state = BUF_STATE_FREE;
1272                 channel->iob[cnt].channel = channel;
1273                 channel->iob[cnt].callback = qeth_send_control_data_cb;
1274         }
1275         if (cnt < QETH_CMD_BUFFER_NO) {
1276                 qeth_clean_channel(channel);
1277                 return -ENOMEM;
1278         }
1279         channel->io_buf_no = 0;
1280         spin_lock_init(&channel->iob_lock);
1281
1282         return 0;
1283 }
1284
1285 static void qeth_set_single_write_queues(struct qeth_card *card)
1286 {
1287         if ((atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED) &&
1288             (card->qdio.no_out_queues == 4))
1289                 qeth_free_qdio_buffers(card);
1290
1291         card->qdio.no_out_queues = 1;
1292         if (card->qdio.default_out_queue != 0)
1293                 dev_info(&card->gdev->dev, "Priority Queueing not supported\n");
1294
1295         card->qdio.default_out_queue = 0;
1296 }
1297
1298 static void qeth_set_multiple_write_queues(struct qeth_card *card)
1299 {
1300         if ((atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED) &&
1301             (card->qdio.no_out_queues == 1)) {
1302                 qeth_free_qdio_buffers(card);
1303                 card->qdio.default_out_queue = 2;
1304         }
1305         card->qdio.no_out_queues = 4;
1306 }
1307
1308 static void qeth_update_from_chp_desc(struct qeth_card *card)
1309 {
1310         struct ccw_device *ccwdev;
1311         struct channel_path_desc_fmt0 *chp_dsc;
1312
1313         QETH_DBF_TEXT(SETUP, 2, "chp_desc");
1314
1315         ccwdev = card->data.ccwdev;
1316         chp_dsc = ccw_device_get_chp_desc(ccwdev, 0);
1317         if (!chp_dsc)
1318                 goto out;
1319
1320         card->info.func_level = 0x4100 + chp_dsc->desc;
1321         if (card->info.type == QETH_CARD_TYPE_IQD)
1322                 goto out;
1323
1324         /* CHPP field bit 6 == 1 -> single queue */
1325         if ((chp_dsc->chpp & 0x02) == 0x02)
1326                 qeth_set_single_write_queues(card);
1327         else
1328                 qeth_set_multiple_write_queues(card);
1329 out:
1330         kfree(chp_dsc);
1331         QETH_DBF_TEXT_(SETUP, 2, "nr:%x", card->qdio.no_out_queues);
1332         QETH_DBF_TEXT_(SETUP, 2, "lvl:%02x", card->info.func_level);
1333 }
1334
1335 static void qeth_init_qdio_info(struct qeth_card *card)
1336 {
1337         QETH_DBF_TEXT(SETUP, 4, "intqdinf");
1338         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
1339         card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT;
1340         card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
1341         card->qdio.no_out_queues = QETH_MAX_QUEUES;
1342
1343         /* inbound */
1344         card->qdio.no_in_queues = 1;
1345         card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
1346         if (card->info.type == QETH_CARD_TYPE_IQD)
1347                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_HSDEFAULT;
1348         else
1349                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_DEFAULT;
1350         card->qdio.in_buf_pool.buf_count = card->qdio.init_pool.buf_count;
1351         INIT_LIST_HEAD(&card->qdio.in_buf_pool.entry_list);
1352         INIT_LIST_HEAD(&card->qdio.init_pool.entry_list);
1353 }
1354
1355 static void qeth_set_initial_options(struct qeth_card *card)
1356 {
1357         card->options.route4.type = NO_ROUTER;
1358         card->options.route6.type = NO_ROUTER;
1359         card->options.rx_sg_cb = QETH_RX_SG_CB;
1360         card->options.isolation = ISOLATION_MODE_NONE;
1361         card->options.cq = QETH_CQ_DISABLED;
1362         card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
1363 }
1364
1365 static int qeth_do_start_thread(struct qeth_card *card, unsigned long thread)
1366 {
1367         unsigned long flags;
1368         int rc = 0;
1369
1370         spin_lock_irqsave(&card->thread_mask_lock, flags);
1371         QETH_CARD_TEXT_(card, 4, "  %02x%02x%02x",
1372                         (u8) card->thread_start_mask,
1373                         (u8) card->thread_allowed_mask,
1374                         (u8) card->thread_running_mask);
1375         rc = (card->thread_start_mask & thread);
1376         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1377         return rc;
1378 }
1379
1380 static void qeth_start_kernel_thread(struct work_struct *work)
1381 {
1382         struct task_struct *ts;
1383         struct qeth_card *card = container_of(work, struct qeth_card,
1384                                         kernel_thread_starter);
1385         QETH_CARD_TEXT(card , 2, "strthrd");
1386
1387         if (card->read.state != CH_STATE_UP &&
1388             card->write.state != CH_STATE_UP)
1389                 return;
1390         if (qeth_do_start_thread(card, QETH_RECOVER_THREAD)) {
1391                 ts = kthread_run(card->discipline->recover, (void *)card,
1392                                 "qeth_recover");
1393                 if (IS_ERR(ts)) {
1394                         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1395                         qeth_clear_thread_running_bit(card,
1396                                 QETH_RECOVER_THREAD);
1397                 }
1398         }
1399 }
1400
1401 static void qeth_buffer_reclaim_work(struct work_struct *);
1402 static void qeth_setup_card(struct qeth_card *card)
1403 {
1404         QETH_DBF_TEXT(SETUP, 2, "setupcrd");
1405         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1406
1407         card->info.type = CARD_RDEV(card)->id.driver_info;
1408         card->state = CARD_STATE_DOWN;
1409         spin_lock_init(&card->mclock);
1410         spin_lock_init(&card->lock);
1411         spin_lock_init(&card->ip_lock);
1412         spin_lock_init(&card->thread_mask_lock);
1413         mutex_init(&card->conf_mutex);
1414         mutex_init(&card->discipline_mutex);
1415         INIT_WORK(&card->kernel_thread_starter, qeth_start_kernel_thread);
1416         INIT_LIST_HEAD(&card->cmd_waiter_list);
1417         init_waitqueue_head(&card->wait_q);
1418         qeth_set_initial_options(card);
1419         /* IP address takeover */
1420         INIT_LIST_HEAD(&card->ipato.entries);
1421         qeth_init_qdio_info(card);
1422         INIT_DELAYED_WORK(&card->buffer_reclaim_work, qeth_buffer_reclaim_work);
1423         INIT_WORK(&card->close_dev_work, qeth_close_dev_handler);
1424 }
1425
1426 static void qeth_core_sl_print(struct seq_file *m, struct service_level *slr)
1427 {
1428         struct qeth_card *card = container_of(slr, struct qeth_card,
1429                                         qeth_service_level);
1430         if (card->info.mcl_level[0])
1431                 seq_printf(m, "qeth: %s firmware level %s\n",
1432                         CARD_BUS_ID(card), card->info.mcl_level);
1433 }
1434
1435 static struct qeth_card *qeth_alloc_card(struct ccwgroup_device *gdev)
1436 {
1437         struct qeth_card *card;
1438
1439         QETH_DBF_TEXT(SETUP, 2, "alloccrd");
1440         card = kzalloc(sizeof(*card), GFP_KERNEL);
1441         if (!card)
1442                 goto out;
1443         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1444
1445         card->gdev = gdev;
1446         dev_set_drvdata(&gdev->dev, card);
1447         CARD_RDEV(card) = gdev->cdev[0];
1448         CARD_WDEV(card) = gdev->cdev[1];
1449         CARD_DDEV(card) = gdev->cdev[2];
1450
1451         card->event_wq = alloc_ordered_workqueue("%s", 0, dev_name(&gdev->dev));
1452         if (!card->event_wq)
1453                 goto out_wq;
1454         if (qeth_setup_channel(&card->read, true))
1455                 goto out_ip;
1456         if (qeth_setup_channel(&card->write, true))
1457                 goto out_channel;
1458         if (qeth_setup_channel(&card->data, false))
1459                 goto out_data;
1460         card->qeth_service_level.seq_print = qeth_core_sl_print;
1461         register_service_level(&card->qeth_service_level);
1462         return card;
1463
1464 out_data:
1465         qeth_clean_channel(&card->write);
1466 out_channel:
1467         qeth_clean_channel(&card->read);
1468 out_ip:
1469         destroy_workqueue(card->event_wq);
1470 out_wq:
1471         dev_set_drvdata(&gdev->dev, NULL);
1472         kfree(card);
1473 out:
1474         return NULL;
1475 }
1476
1477 static int qeth_clear_channel(struct qeth_card *card,
1478                               struct qeth_channel *channel)
1479 {
1480         int rc;
1481
1482         QETH_CARD_TEXT(card, 3, "clearch");
1483         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1484         rc = ccw_device_clear(channel->ccwdev, QETH_CLEAR_CHANNEL_PARM);
1485         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1486
1487         if (rc)
1488                 return rc;
1489         rc = wait_event_interruptible_timeout(card->wait_q,
1490                         channel->state == CH_STATE_STOPPED, QETH_TIMEOUT);
1491         if (rc == -ERESTARTSYS)
1492                 return rc;
1493         if (channel->state != CH_STATE_STOPPED)
1494                 return -ETIME;
1495         channel->state = CH_STATE_DOWN;
1496         return 0;
1497 }
1498
1499 static int qeth_halt_channel(struct qeth_card *card,
1500                              struct qeth_channel *channel)
1501 {
1502         int rc;
1503
1504         QETH_CARD_TEXT(card, 3, "haltch");
1505         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1506         rc = ccw_device_halt(channel->ccwdev, QETH_HALT_CHANNEL_PARM);
1507         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1508
1509         if (rc)
1510                 return rc;
1511         rc = wait_event_interruptible_timeout(card->wait_q,
1512                         channel->state == CH_STATE_HALTED, QETH_TIMEOUT);
1513         if (rc == -ERESTARTSYS)
1514                 return rc;
1515         if (channel->state != CH_STATE_HALTED)
1516                 return -ETIME;
1517         return 0;
1518 }
1519
1520 static int qeth_halt_channels(struct qeth_card *card)
1521 {
1522         int rc1 = 0, rc2 = 0, rc3 = 0;
1523
1524         QETH_CARD_TEXT(card, 3, "haltchs");
1525         rc1 = qeth_halt_channel(card, &card->read);
1526         rc2 = qeth_halt_channel(card, &card->write);
1527         rc3 = qeth_halt_channel(card, &card->data);
1528         if (rc1)
1529                 return rc1;
1530         if (rc2)
1531                 return rc2;
1532         return rc3;
1533 }
1534
1535 static int qeth_clear_channels(struct qeth_card *card)
1536 {
1537         int rc1 = 0, rc2 = 0, rc3 = 0;
1538
1539         QETH_CARD_TEXT(card, 3, "clearchs");
1540         rc1 = qeth_clear_channel(card, &card->read);
1541         rc2 = qeth_clear_channel(card, &card->write);
1542         rc3 = qeth_clear_channel(card, &card->data);
1543         if (rc1)
1544                 return rc1;
1545         if (rc2)
1546                 return rc2;
1547         return rc3;
1548 }
1549
1550 static int qeth_clear_halt_card(struct qeth_card *card, int halt)
1551 {
1552         int rc = 0;
1553
1554         QETH_CARD_TEXT(card, 3, "clhacrd");
1555
1556         if (halt)
1557                 rc = qeth_halt_channels(card);
1558         if (rc)
1559                 return rc;
1560         return qeth_clear_channels(card);
1561 }
1562
1563 int qeth_qdio_clear_card(struct qeth_card *card, int use_halt)
1564 {
1565         int rc = 0;
1566
1567         QETH_CARD_TEXT(card, 3, "qdioclr");
1568         switch (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ESTABLISHED,
1569                 QETH_QDIO_CLEANING)) {
1570         case QETH_QDIO_ESTABLISHED:
1571                 if (card->info.type == QETH_CARD_TYPE_IQD)
1572                         rc = qdio_shutdown(CARD_DDEV(card),
1573                                 QDIO_FLAG_CLEANUP_USING_HALT);
1574                 else
1575                         rc = qdio_shutdown(CARD_DDEV(card),
1576                                 QDIO_FLAG_CLEANUP_USING_CLEAR);
1577                 if (rc)
1578                         QETH_CARD_TEXT_(card, 3, "1err%d", rc);
1579                 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
1580                 break;
1581         case QETH_QDIO_CLEANING:
1582                 return rc;
1583         default:
1584                 break;
1585         }
1586         rc = qeth_clear_halt_card(card, use_halt);
1587         if (rc)
1588                 QETH_CARD_TEXT_(card, 3, "2err%d", rc);
1589         card->state = CARD_STATE_DOWN;
1590         return rc;
1591 }
1592 EXPORT_SYMBOL_GPL(qeth_qdio_clear_card);
1593
1594 static int qeth_read_conf_data(struct qeth_card *card, void **buffer,
1595                                int *length)
1596 {
1597         struct ciw *ciw;
1598         char *rcd_buf;
1599         int ret;
1600         struct qeth_channel *channel = &card->data;
1601
1602         /*
1603          * scan for RCD command in extended SenseID data
1604          */
1605         ciw = ccw_device_get_ciw(channel->ccwdev, CIW_TYPE_RCD);
1606         if (!ciw || ciw->cmd == 0)
1607                 return -EOPNOTSUPP;
1608         rcd_buf = kzalloc(ciw->count, GFP_KERNEL | GFP_DMA);
1609         if (!rcd_buf)
1610                 return -ENOMEM;
1611
1612         qeth_setup_ccw(channel->ccw, ciw->cmd, ciw->count, rcd_buf);
1613         channel->state = CH_STATE_RCD;
1614         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1615         ret = ccw_device_start_timeout(channel->ccwdev, channel->ccw,
1616                                        QETH_RCD_PARM, LPM_ANYPATH, 0,
1617                                        QETH_RCD_TIMEOUT);
1618         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1619         if (!ret)
1620                 wait_event(card->wait_q,
1621                            (channel->state == CH_STATE_RCD_DONE ||
1622                             channel->state == CH_STATE_DOWN));
1623         if (channel->state == CH_STATE_DOWN)
1624                 ret = -EIO;
1625         else
1626                 channel->state = CH_STATE_DOWN;
1627         if (ret) {
1628                 kfree(rcd_buf);
1629                 *buffer = NULL;
1630                 *length = 0;
1631         } else {
1632                 *length = ciw->count;
1633                 *buffer = rcd_buf;
1634         }
1635         return ret;
1636 }
1637
1638 static void qeth_configure_unitaddr(struct qeth_card *card, char *prcd)
1639 {
1640         QETH_DBF_TEXT(SETUP, 2, "cfgunit");
1641         card->info.chpid = prcd[30];
1642         card->info.unit_addr2 = prcd[31];
1643         card->info.cula = prcd[63];
1644         card->info.guestlan = ((prcd[0x10] == _ascebc['V']) &&
1645                                (prcd[0x11] == _ascebc['M']));
1646 }
1647
1648 static enum qeth_discipline_id qeth_vm_detect_layer(struct qeth_card *card)
1649 {
1650         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1651         struct diag26c_vnic_resp *response = NULL;
1652         struct diag26c_vnic_req *request = NULL;
1653         struct ccw_dev_id id;
1654         char userid[80];
1655         int rc = 0;
1656
1657         QETH_DBF_TEXT(SETUP, 2, "vmlayer");
1658
1659         cpcmd("QUERY USERID", userid, sizeof(userid), &rc);
1660         if (rc)
1661                 goto out;
1662
1663         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
1664         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
1665         if (!request || !response) {
1666                 rc = -ENOMEM;
1667                 goto out;
1668         }
1669
1670         ccw_device_get_id(CARD_RDEV(card), &id);
1671         request->resp_buf_len = sizeof(*response);
1672         request->resp_version = DIAG26C_VERSION6_VM65918;
1673         request->req_format = DIAG26C_VNIC_INFO;
1674         ASCEBC(userid, 8);
1675         memcpy(&request->sys_name, userid, 8);
1676         request->devno = id.devno;
1677
1678         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1679         rc = diag26c(request, response, DIAG26C_PORT_VNIC);
1680         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1681         if (rc)
1682                 goto out;
1683         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
1684
1685         if (request->resp_buf_len < sizeof(*response) ||
1686             response->version != request->resp_version) {
1687                 rc = -EIO;
1688                 goto out;
1689         }
1690
1691         if (response->protocol == VNIC_INFO_PROT_L2)
1692                 disc = QETH_DISCIPLINE_LAYER2;
1693         else if (response->protocol == VNIC_INFO_PROT_L3)
1694                 disc = QETH_DISCIPLINE_LAYER3;
1695
1696 out:
1697         kfree(response);
1698         kfree(request);
1699         if (rc)
1700                 QETH_DBF_TEXT_(SETUP, 2, "err%x", rc);
1701         return disc;
1702 }
1703
1704 /* Determine whether the device requires a specific layer discipline */
1705 static enum qeth_discipline_id qeth_enforce_discipline(struct qeth_card *card)
1706 {
1707         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1708
1709         if (card->info.type == QETH_CARD_TYPE_OSM ||
1710             card->info.type == QETH_CARD_TYPE_OSN)
1711                 disc = QETH_DISCIPLINE_LAYER2;
1712         else if (card->info.guestlan)
1713                 disc = (card->info.type == QETH_CARD_TYPE_IQD) ?
1714                                 QETH_DISCIPLINE_LAYER3 :
1715                                 qeth_vm_detect_layer(card);
1716
1717         switch (disc) {
1718         case QETH_DISCIPLINE_LAYER2:
1719                 QETH_DBF_TEXT(SETUP, 3, "force l2");
1720                 break;
1721         case QETH_DISCIPLINE_LAYER3:
1722                 QETH_DBF_TEXT(SETUP, 3, "force l3");
1723                 break;
1724         default:
1725                 QETH_DBF_TEXT(SETUP, 3, "force no");
1726         }
1727
1728         return disc;
1729 }
1730
1731 static void qeth_configure_blkt_default(struct qeth_card *card, char *prcd)
1732 {
1733         QETH_DBF_TEXT(SETUP, 2, "cfgblkt");
1734
1735         if (prcd[74] == 0xF0 && prcd[75] == 0xF0 &&
1736             prcd[76] >= 0xF1 && prcd[76] <= 0xF4) {
1737                 card->info.blkt.time_total = 0;
1738                 card->info.blkt.inter_packet = 0;
1739                 card->info.blkt.inter_packet_jumbo = 0;
1740         } else {
1741                 card->info.blkt.time_total = 250;
1742                 card->info.blkt.inter_packet = 5;
1743                 card->info.blkt.inter_packet_jumbo = 15;
1744         }
1745 }
1746
1747 static void qeth_init_tokens(struct qeth_card *card)
1748 {
1749         card->token.issuer_rm_w = 0x00010103UL;
1750         card->token.cm_filter_w = 0x00010108UL;
1751         card->token.cm_connection_w = 0x0001010aUL;
1752         card->token.ulp_filter_w = 0x0001010bUL;
1753         card->token.ulp_connection_w = 0x0001010dUL;
1754 }
1755
1756 static void qeth_init_func_level(struct qeth_card *card)
1757 {
1758         switch (card->info.type) {
1759         case QETH_CARD_TYPE_IQD:
1760                 card->info.func_level = QETH_IDX_FUNC_LEVEL_IQD;
1761                 break;
1762         case QETH_CARD_TYPE_OSD:
1763         case QETH_CARD_TYPE_OSN:
1764                 card->info.func_level = QETH_IDX_FUNC_LEVEL_OSD;
1765                 break;
1766         default:
1767                 break;
1768         }
1769 }
1770
1771 static int qeth_idx_activate_get_answer(struct qeth_card *card,
1772                                         struct qeth_channel *channel,
1773                                         void (*reply_cb)(struct qeth_card *,
1774                                                          struct qeth_channel *,
1775                                                          struct qeth_cmd_buffer *))
1776 {
1777         struct qeth_cmd_buffer *iob;
1778         int rc;
1779
1780         QETH_DBF_TEXT(SETUP, 2, "idxanswr");
1781         iob = qeth_get_buffer(channel);
1782         if (!iob)
1783                 return -ENOMEM;
1784         iob->callback = reply_cb;
1785         qeth_setup_ccw(channel->ccw, CCW_CMD_READ, QETH_BUFSIZE, iob->data);
1786
1787         wait_event(card->wait_q,
1788                    atomic_cmpxchg(&channel->irq_pending, 0, 1) == 0);
1789         QETH_DBF_TEXT(SETUP, 6, "noirqpnd");
1790         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1791         rc = ccw_device_start_timeout(channel->ccwdev, channel->ccw,
1792                                       (addr_t) iob, 0, 0, QETH_TIMEOUT);
1793         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1794
1795         if (rc) {
1796                 QETH_DBF_MESSAGE(2, "Error2 in activating channel rc=%d\n", rc);
1797                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
1798                 atomic_set(&channel->irq_pending, 0);
1799                 qeth_release_buffer(channel, iob);
1800                 wake_up(&card->wait_q);
1801                 return rc;
1802         }
1803         rc = wait_event_interruptible_timeout(card->wait_q,
1804                          channel->state == CH_STATE_UP, QETH_TIMEOUT);
1805         if (rc == -ERESTARTSYS)
1806                 return rc;
1807         if (channel->state != CH_STATE_UP) {
1808                 rc = -ETIME;
1809                 QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
1810         } else
1811                 rc = 0;
1812         return rc;
1813 }
1814
1815 static int qeth_idx_activate_channel(struct qeth_card *card,
1816                                      struct qeth_channel *channel,
1817                                      void (*reply_cb)(struct qeth_card *,
1818                                                       struct qeth_channel *,
1819                                                       struct qeth_cmd_buffer *))
1820 {
1821         struct qeth_cmd_buffer *iob;
1822         __u16 temp;
1823         __u8 tmp;
1824         int rc;
1825         struct ccw_dev_id temp_devid;
1826
1827         QETH_DBF_TEXT(SETUP, 2, "idxactch");
1828
1829         iob = qeth_get_buffer(channel);
1830         if (!iob)
1831                 return -ENOMEM;
1832         iob->callback = reply_cb;
1833         qeth_setup_ccw(channel->ccw, CCW_CMD_WRITE, IDX_ACTIVATE_SIZE,
1834                        iob->data);
1835         if (channel == &card->write) {
1836                 memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE);
1837                 memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data),
1838                        &card->seqno.trans_hdr, QETH_SEQ_NO_LENGTH);
1839                 card->seqno.trans_hdr++;
1840         } else {
1841                 memcpy(iob->data, IDX_ACTIVATE_READ, IDX_ACTIVATE_SIZE);
1842                 memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data),
1843                        &card->seqno.trans_hdr, QETH_SEQ_NO_LENGTH);
1844         }
1845         tmp = ((u8)card->dev->dev_port) | 0x80;
1846         memcpy(QETH_IDX_ACT_PNO(iob->data), &tmp, 1);
1847         memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
1848                &card->token.issuer_rm_w, QETH_MPC_TOKEN_LENGTH);
1849         memcpy(QETH_IDX_ACT_FUNC_LEVEL(iob->data),
1850                &card->info.func_level, sizeof(__u16));
1851         ccw_device_get_id(CARD_DDEV(card), &temp_devid);
1852         memcpy(QETH_IDX_ACT_QDIO_DEV_CUA(iob->data), &temp_devid.devno, 2);
1853         temp = (card->info.cula << 8) + card->info.unit_addr2;
1854         memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &temp, 2);
1855
1856         wait_event(card->wait_q,
1857                    atomic_cmpxchg(&channel->irq_pending, 0, 1) == 0);
1858         QETH_DBF_TEXT(SETUP, 6, "noirqpnd");
1859         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1860         rc = ccw_device_start_timeout(channel->ccwdev, channel->ccw,
1861                                       (addr_t) iob, 0, 0, QETH_TIMEOUT);
1862         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1863
1864         if (rc) {
1865                 QETH_DBF_MESSAGE(2, "Error1 in activating channel. rc=%d\n",
1866                         rc);
1867                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1868                 atomic_set(&channel->irq_pending, 0);
1869                 qeth_release_buffer(channel, iob);
1870                 wake_up(&card->wait_q);
1871                 return rc;
1872         }
1873         rc = wait_event_interruptible_timeout(card->wait_q,
1874                         channel->state == CH_STATE_ACTIVATING, QETH_TIMEOUT);
1875         if (rc == -ERESTARTSYS)
1876                 return rc;
1877         if (channel->state != CH_STATE_ACTIVATING) {
1878                 dev_warn(&channel->ccwdev->dev, "The qeth device driver"
1879                         " failed to recover an error on the device\n");
1880                 QETH_DBF_MESSAGE(2, "IDX activate timed out on channel %x\n",
1881                                  CCW_DEVID(channel->ccwdev));
1882                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", -ETIME);
1883                 return -ETIME;
1884         }
1885         return qeth_idx_activate_get_answer(card, channel, reply_cb);
1886 }
1887
1888 static int qeth_peer_func_level(int level)
1889 {
1890         if ((level & 0xff) == 8)
1891                 return (level & 0xff) + 0x400;
1892         if (((level >> 8) & 3) == 1)
1893                 return (level & 0xff) + 0x200;
1894         return level;
1895 }
1896
1897 static void qeth_idx_write_cb(struct qeth_card *card,
1898                               struct qeth_channel *channel,
1899                               struct qeth_cmd_buffer *iob)
1900 {
1901         __u16 temp;
1902
1903         QETH_DBF_TEXT(SETUP , 2, "idxwrcb");
1904
1905         if (channel->state == CH_STATE_DOWN) {
1906                 channel->state = CH_STATE_ACTIVATING;
1907                 goto out;
1908         }
1909
1910         if (!(QETH_IS_IDX_ACT_POS_REPLY(iob->data))) {
1911                 if (QETH_IDX_ACT_CAUSE_CODE(iob->data) == QETH_IDX_ACT_ERR_EXCL)
1912                         dev_err(&channel->ccwdev->dev,
1913                                 "The adapter is used exclusively by another "
1914                                 "host\n");
1915                 else
1916                         QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: negative reply\n",
1917                                          CCW_DEVID(channel->ccwdev));
1918                 goto out;
1919         }
1920         memcpy(&temp, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
1921         if ((temp & ~0x0100) != qeth_peer_func_level(card->info.func_level)) {
1922                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
1923                                  CCW_DEVID(channel->ccwdev),
1924                                  card->info.func_level, temp);
1925                 goto out;
1926         }
1927         channel->state = CH_STATE_UP;
1928 out:
1929         qeth_release_buffer(channel, iob);
1930 }
1931
1932 static void qeth_idx_read_cb(struct qeth_card *card,
1933                              struct qeth_channel *channel,
1934                              struct qeth_cmd_buffer *iob)
1935 {
1936         __u16 temp;
1937
1938         QETH_DBF_TEXT(SETUP , 2, "idxrdcb");
1939         if (channel->state == CH_STATE_DOWN) {
1940                 channel->state = CH_STATE_ACTIVATING;
1941                 goto out;
1942         }
1943
1944         if (qeth_check_idx_response(card, iob->data))
1945                         goto out;
1946
1947         if (!(QETH_IS_IDX_ACT_POS_REPLY(iob->data))) {
1948                 switch (QETH_IDX_ACT_CAUSE_CODE(iob->data)) {
1949                 case QETH_IDX_ACT_ERR_EXCL:
1950                         dev_err(&channel->ccwdev->dev,
1951                                 "The adapter is used exclusively by another "
1952                                 "host\n");
1953                         break;
1954                 case QETH_IDX_ACT_ERR_AUTH:
1955                 case QETH_IDX_ACT_ERR_AUTH_USER:
1956                         dev_err(&channel->ccwdev->dev,
1957                                 "Setting the device online failed because of "
1958                                 "insufficient authorization\n");
1959                         break;
1960                 default:
1961                         QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: negative reply\n",
1962                                          CCW_DEVID(channel->ccwdev));
1963                 }
1964                 QETH_CARD_TEXT_(card, 2, "idxread%c",
1965                         QETH_IDX_ACT_CAUSE_CODE(iob->data));
1966                 goto out;
1967         }
1968
1969         memcpy(&temp, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
1970         if (temp != qeth_peer_func_level(card->info.func_level)) {
1971                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
1972                                  CCW_DEVID(channel->ccwdev),
1973                                  card->info.func_level, temp);
1974                 goto out;
1975         }
1976         memcpy(&card->token.issuer_rm_r,
1977                QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
1978                QETH_MPC_TOKEN_LENGTH);
1979         memcpy(&card->info.mcl_level[0],
1980                QETH_IDX_REPLY_LEVEL(iob->data), QETH_MCL_LENGTH);
1981         channel->state = CH_STATE_UP;
1982 out:
1983         qeth_release_buffer(channel, iob);
1984 }
1985
1986 void qeth_prepare_control_data(struct qeth_card *card, int len,
1987                 struct qeth_cmd_buffer *iob)
1988 {
1989         qeth_setup_ccw(iob->channel->ccw, CCW_CMD_WRITE, len, iob->data);
1990         iob->callback = qeth_release_buffer_cb;
1991
1992         memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data),
1993                &card->seqno.trans_hdr, QETH_SEQ_NO_LENGTH);
1994         card->seqno.trans_hdr++;
1995         memcpy(QETH_PDU_HEADER_SEQ_NO(iob->data),
1996                &card->seqno.pdu_hdr, QETH_SEQ_NO_LENGTH);
1997         card->seqno.pdu_hdr++;
1998         memcpy(QETH_PDU_HEADER_ACK_SEQ_NO(iob->data),
1999                &card->seqno.pdu_hdr_ack, QETH_SEQ_NO_LENGTH);
2000         QETH_DBF_HEX(CTRL, 2, iob->data, min(len, QETH_DBF_CTRL_LEN));
2001 }
2002 EXPORT_SYMBOL_GPL(qeth_prepare_control_data);
2003
2004 /**
2005  * qeth_send_control_data() -   send control command to the card
2006  * @card:                       qeth_card structure pointer
2007  * @len:                        size of the command buffer
2008  * @iob:                        qeth_cmd_buffer pointer
2009  * @reply_cb:                   callback function pointer
2010  * @cb_card:                    pointer to the qeth_card structure
2011  * @cb_reply:                   pointer to the qeth_reply structure
2012  * @cb_cmd:                     pointer to the original iob for non-IPA
2013  *                              commands, or to the qeth_ipa_cmd structure
2014  *                              for the IPA commands.
2015  * @reply_param:                private pointer passed to the callback
2016  *
2017  * Callback function gets called one or more times, with cb_cmd
2018  * pointing to the response returned by the hardware. Callback
2019  * function must return
2020  *   > 0 if more reply blocks are expected,
2021  *     0 if the last or only reply block is received, and
2022  *   < 0 on error.
2023  * Callback function can get the value of the reply_param pointer from the
2024  * field 'param' of the structure qeth_reply.
2025  */
2026
2027 static int qeth_send_control_data(struct qeth_card *card, int len,
2028                                   struct qeth_cmd_buffer *iob,
2029                                   int (*reply_cb)(struct qeth_card *cb_card,
2030                                                   struct qeth_reply *cb_reply,
2031                                                   unsigned long cb_cmd),
2032                                   void *reply_param)
2033 {
2034         struct qeth_channel *channel = iob->channel;
2035         int rc;
2036         struct qeth_reply *reply = NULL;
2037         unsigned long timeout, event_timeout;
2038         struct qeth_ipa_cmd *cmd = NULL;
2039
2040         QETH_CARD_TEXT(card, 2, "sendctl");
2041
2042         if (card->read_or_write_problem) {
2043                 qeth_release_buffer(channel, iob);
2044                 return -EIO;
2045         }
2046         reply = qeth_alloc_reply(card);
2047         if (!reply) {
2048                 qeth_release_buffer(channel, iob);
2049                 return -ENOMEM;
2050         }
2051         reply->callback = reply_cb;
2052         reply->param = reply_param;
2053
2054         /* pairs with qeth_release_buffer(): */
2055         qeth_get_reply(reply);
2056         iob->reply = reply;
2057
2058         while (atomic_cmpxchg(&channel->irq_pending, 0, 1)) ;
2059
2060         if (IS_IPA(iob->data)) {
2061                 cmd = __ipa_cmd(iob);
2062                 cmd->hdr.seqno = card->seqno.ipa++;
2063                 reply->seqno = cmd->hdr.seqno;
2064                 event_timeout = QETH_IPA_TIMEOUT;
2065         } else {
2066                 reply->seqno = QETH_IDX_COMMAND_SEQNO;
2067                 event_timeout = QETH_TIMEOUT;
2068         }
2069         qeth_prepare_control_data(card, len, iob);
2070
2071         qeth_enqueue_reply(card, reply);
2072
2073         timeout = jiffies + event_timeout;
2074
2075         QETH_CARD_TEXT(card, 6, "noirqpnd");
2076         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
2077         rc = ccw_device_start_timeout(channel->ccwdev, channel->ccw,
2078                                       (addr_t) iob, 0, 0, event_timeout);
2079         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
2080         if (rc) {
2081                 QETH_DBF_MESSAGE(2, "qeth_send_control_data on device %x: ccw_device_start rc = %i\n",
2082                                  CARD_DEVID(card), rc);
2083                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
2084                 qeth_dequeue_reply(card, reply);
2085                 qeth_put_reply(reply);
2086                 qeth_release_buffer(channel, iob);
2087                 atomic_set(&channel->irq_pending, 0);
2088                 wake_up(&card->wait_q);
2089                 return rc;
2090         }
2091
2092         /* we have only one long running ipassist, since we can ensure
2093            process context of this command we can sleep */
2094         if (cmd && cmd->hdr.command == IPA_CMD_SETIP &&
2095             cmd->hdr.prot_version == QETH_PROT_IPV4) {
2096                 if (!wait_event_timeout(reply->wait_q,
2097                     atomic_read(&reply->received), event_timeout))
2098                         goto time_err;
2099         } else {
2100                 while (!atomic_read(&reply->received)) {
2101                         if (time_after(jiffies, timeout))
2102                                 goto time_err;
2103                         cpu_relax();
2104                 }
2105         }
2106
2107         qeth_dequeue_reply(card, reply);
2108         rc = reply->rc;
2109         qeth_put_reply(reply);
2110         return rc;
2111
2112 time_err:
2113         qeth_dequeue_reply(card, reply);
2114         qeth_put_reply(reply);
2115         return -ETIME;
2116 }
2117
2118 static int qeth_cm_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2119                 unsigned long data)
2120 {
2121         struct qeth_cmd_buffer *iob;
2122
2123         QETH_DBF_TEXT(SETUP, 2, "cmenblcb");
2124
2125         iob = (struct qeth_cmd_buffer *) data;
2126         memcpy(&card->token.cm_filter_r,
2127                QETH_CM_ENABLE_RESP_FILTER_TOKEN(iob->data),
2128                QETH_MPC_TOKEN_LENGTH);
2129         return 0;
2130 }
2131
2132 static int qeth_cm_enable(struct qeth_card *card)
2133 {
2134         int rc;
2135         struct qeth_cmd_buffer *iob;
2136
2137         QETH_DBF_TEXT(SETUP, 2, "cmenable");
2138
2139         iob = qeth_wait_for_buffer(&card->write);
2140         memcpy(iob->data, CM_ENABLE, CM_ENABLE_SIZE);
2141         memcpy(QETH_CM_ENABLE_ISSUER_RM_TOKEN(iob->data),
2142                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2143         memcpy(QETH_CM_ENABLE_FILTER_TOKEN(iob->data),
2144                &card->token.cm_filter_w, QETH_MPC_TOKEN_LENGTH);
2145
2146         rc = qeth_send_control_data(card, CM_ENABLE_SIZE, iob,
2147                                     qeth_cm_enable_cb, NULL);
2148         return rc;
2149 }
2150
2151 static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2152                 unsigned long data)
2153 {
2154         struct qeth_cmd_buffer *iob;
2155
2156         QETH_DBF_TEXT(SETUP, 2, "cmsetpcb");
2157
2158         iob = (struct qeth_cmd_buffer *) data;
2159         memcpy(&card->token.cm_connection_r,
2160                QETH_CM_SETUP_RESP_DEST_ADDR(iob->data),
2161                QETH_MPC_TOKEN_LENGTH);
2162         return 0;
2163 }
2164
2165 static int qeth_cm_setup(struct qeth_card *card)
2166 {
2167         int rc;
2168         struct qeth_cmd_buffer *iob;
2169
2170         QETH_DBF_TEXT(SETUP, 2, "cmsetup");
2171
2172         iob = qeth_wait_for_buffer(&card->write);
2173         memcpy(iob->data, CM_SETUP, CM_SETUP_SIZE);
2174         memcpy(QETH_CM_SETUP_DEST_ADDR(iob->data),
2175                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2176         memcpy(QETH_CM_SETUP_CONNECTION_TOKEN(iob->data),
2177                &card->token.cm_connection_w, QETH_MPC_TOKEN_LENGTH);
2178         memcpy(QETH_CM_SETUP_FILTER_TOKEN(iob->data),
2179                &card->token.cm_filter_r, QETH_MPC_TOKEN_LENGTH);
2180         rc = qeth_send_control_data(card, CM_SETUP_SIZE, iob,
2181                                     qeth_cm_setup_cb, NULL);
2182         return rc;
2183 }
2184
2185 static int qeth_update_max_mtu(struct qeth_card *card, unsigned int max_mtu)
2186 {
2187         struct net_device *dev = card->dev;
2188         unsigned int new_mtu;
2189
2190         if (!max_mtu) {
2191                 /* IQD needs accurate max MTU to set up its RX buffers: */
2192                 if (IS_IQD(card))
2193                         return -EINVAL;
2194                 /* tolerate quirky HW: */
2195                 max_mtu = ETH_MAX_MTU;
2196         }
2197
2198         rtnl_lock();
2199         if (IS_IQD(card)) {
2200                 /* move any device with default MTU to new max MTU: */
2201                 new_mtu = (dev->mtu == dev->max_mtu) ? max_mtu : dev->mtu;
2202
2203                 /* adjust RX buffer size to new max MTU: */
2204                 card->qdio.in_buf_size = max_mtu + 2 * PAGE_SIZE;
2205                 if (dev->max_mtu && dev->max_mtu != max_mtu)
2206                         qeth_free_qdio_buffers(card);
2207         } else {
2208                 if (dev->mtu)
2209                         new_mtu = dev->mtu;
2210                 /* default MTUs for first setup: */
2211                 else if (IS_LAYER2(card))
2212                         new_mtu = ETH_DATA_LEN;
2213                 else
2214                         new_mtu = ETH_DATA_LEN - 8; /* allow for LLC + SNAP */
2215         }
2216
2217         dev->max_mtu = max_mtu;
2218         dev->mtu = min(new_mtu, max_mtu);
2219         rtnl_unlock();
2220         return 0;
2221 }
2222
2223 static int qeth_get_mtu_outof_framesize(int framesize)
2224 {
2225         switch (framesize) {
2226         case 0x4000:
2227                 return 8192;
2228         case 0x6000:
2229                 return 16384;
2230         case 0xa000:
2231                 return 32768;
2232         case 0xffff:
2233                 return 57344;
2234         default:
2235                 return 0;
2236         }
2237 }
2238
2239 static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2240                 unsigned long data)
2241 {
2242         __u16 mtu, framesize;
2243         __u16 len;
2244         __u8 link_type;
2245         struct qeth_cmd_buffer *iob;
2246
2247         QETH_DBF_TEXT(SETUP, 2, "ulpenacb");
2248
2249         iob = (struct qeth_cmd_buffer *) data;
2250         memcpy(&card->token.ulp_filter_r,
2251                QETH_ULP_ENABLE_RESP_FILTER_TOKEN(iob->data),
2252                QETH_MPC_TOKEN_LENGTH);
2253         if (card->info.type == QETH_CARD_TYPE_IQD) {
2254                 memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2);
2255                 mtu = qeth_get_mtu_outof_framesize(framesize);
2256         } else {
2257                 mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data);
2258         }
2259         *(u16 *)reply->param = mtu;
2260
2261         memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2);
2262         if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) {
2263                 memcpy(&link_type,
2264                        QETH_ULP_ENABLE_RESP_LINK_TYPE(iob->data), 1);
2265                 card->info.link_type = link_type;
2266         } else
2267                 card->info.link_type = 0;
2268         QETH_DBF_TEXT_(SETUP, 2, "link%d", card->info.link_type);
2269         return 0;
2270 }
2271
2272 static u8 qeth_mpc_select_prot_type(struct qeth_card *card)
2273 {
2274         if (IS_OSN(card))
2275                 return QETH_PROT_OSN2;
2276         return IS_LAYER2(card) ? QETH_PROT_LAYER2 : QETH_PROT_TCPIP;
2277 }
2278
2279 static int qeth_ulp_enable(struct qeth_card *card)
2280 {
2281         u8 prot_type = qeth_mpc_select_prot_type(card);
2282         struct qeth_cmd_buffer *iob;
2283         u16 max_mtu;
2284         int rc;
2285
2286         /*FIXME: trace view callbacks*/
2287         QETH_DBF_TEXT(SETUP, 2, "ulpenabl");
2288
2289         iob = qeth_wait_for_buffer(&card->write);
2290         memcpy(iob->data, ULP_ENABLE, ULP_ENABLE_SIZE);
2291
2292         *(QETH_ULP_ENABLE_LINKNUM(iob->data)) = (u8) card->dev->dev_port;
2293         memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1);
2294         memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data),
2295                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2296         memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data),
2297                &card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH);
2298         rc = qeth_send_control_data(card, ULP_ENABLE_SIZE, iob,
2299                                     qeth_ulp_enable_cb, &max_mtu);
2300         if (rc)
2301                 return rc;
2302         return qeth_update_max_mtu(card, max_mtu);
2303 }
2304
2305 static int qeth_ulp_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2306                 unsigned long data)
2307 {
2308         struct qeth_cmd_buffer *iob;
2309
2310         QETH_DBF_TEXT(SETUP, 2, "ulpstpcb");
2311
2312         iob = (struct qeth_cmd_buffer *) data;
2313         memcpy(&card->token.ulp_connection_r,
2314                QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2315                QETH_MPC_TOKEN_LENGTH);
2316         if (!strncmp("00S", QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2317                      3)) {
2318                 QETH_DBF_TEXT(SETUP, 2, "olmlimit");
2319                 dev_err(&card->gdev->dev, "A connection could not be "
2320                         "established because of an OLM limit\n");
2321                 return -EMLINK;
2322         }
2323         return 0;
2324 }
2325
2326 static int qeth_ulp_setup(struct qeth_card *card)
2327 {
2328         int rc;
2329         __u16 temp;
2330         struct qeth_cmd_buffer *iob;
2331         struct ccw_dev_id dev_id;
2332
2333         QETH_DBF_TEXT(SETUP, 2, "ulpsetup");
2334
2335         iob = qeth_wait_for_buffer(&card->write);
2336         memcpy(iob->data, ULP_SETUP, ULP_SETUP_SIZE);
2337
2338         memcpy(QETH_ULP_SETUP_DEST_ADDR(iob->data),
2339                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2340         memcpy(QETH_ULP_SETUP_CONNECTION_TOKEN(iob->data),
2341                &card->token.ulp_connection_w, QETH_MPC_TOKEN_LENGTH);
2342         memcpy(QETH_ULP_SETUP_FILTER_TOKEN(iob->data),
2343                &card->token.ulp_filter_r, QETH_MPC_TOKEN_LENGTH);
2344
2345         ccw_device_get_id(CARD_DDEV(card), &dev_id);
2346         memcpy(QETH_ULP_SETUP_CUA(iob->data), &dev_id.devno, 2);
2347         temp = (card->info.cula << 8) + card->info.unit_addr2;
2348         memcpy(QETH_ULP_SETUP_REAL_DEVADDR(iob->data), &temp, 2);
2349         rc = qeth_send_control_data(card, ULP_SETUP_SIZE, iob,
2350                                     qeth_ulp_setup_cb, NULL);
2351         return rc;
2352 }
2353
2354 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *q, int bidx)
2355 {
2356         struct qeth_qdio_out_buffer *newbuf;
2357
2358         newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, GFP_ATOMIC);
2359         if (!newbuf)
2360                 return -ENOMEM;
2361
2362         newbuf->buffer = q->qdio_bufs[bidx];
2363         skb_queue_head_init(&newbuf->skb_list);
2364         lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key);
2365         newbuf->q = q;
2366         newbuf->next_pending = q->bufs[bidx];
2367         atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY);
2368         q->bufs[bidx] = newbuf;
2369         return 0;
2370 }
2371
2372 static void qeth_free_output_queue(struct qeth_qdio_out_q *q)
2373 {
2374         if (!q)
2375                 return;
2376
2377         qeth_clear_outq_buffers(q, 1);
2378         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2379         kfree(q);
2380 }
2381
2382 static struct qeth_qdio_out_q *qeth_alloc_qdio_out_buf(void)
2383 {
2384         struct qeth_qdio_out_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
2385
2386         if (!q)
2387                 return NULL;
2388
2389         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
2390                 kfree(q);
2391                 return NULL;
2392         }
2393         return q;
2394 }
2395
2396 static int qeth_alloc_qdio_buffers(struct qeth_card *card)
2397 {
2398         int i, j;
2399
2400         QETH_DBF_TEXT(SETUP, 2, "allcqdbf");
2401
2402         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED,
2403                 QETH_QDIO_ALLOCATED) != QETH_QDIO_UNINITIALIZED)
2404                 return 0;
2405
2406         QETH_DBF_TEXT(SETUP, 2, "inq");
2407         card->qdio.in_q = qeth_alloc_qdio_queue();
2408         if (!card->qdio.in_q)
2409                 goto out_nomem;
2410
2411         /* inbound buffer pool */
2412         if (qeth_alloc_buffer_pool(card))
2413                 goto out_freeinq;
2414
2415         /* outbound */
2416         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2417                 card->qdio.out_qs[i] = qeth_alloc_qdio_out_buf();
2418                 if (!card->qdio.out_qs[i])
2419                         goto out_freeoutq;
2420                 QETH_DBF_TEXT_(SETUP, 2, "outq %i", i);
2421                 QETH_DBF_HEX(SETUP, 2, &card->qdio.out_qs[i], sizeof(void *));
2422                 card->qdio.out_qs[i]->queue_no = i;
2423                 /* give outbound qeth_qdio_buffers their qdio_buffers */
2424                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2425                         WARN_ON(card->qdio.out_qs[i]->bufs[j] != NULL);
2426                         if (qeth_init_qdio_out_buf(card->qdio.out_qs[i], j))
2427                                 goto out_freeoutqbufs;
2428                 }
2429         }
2430
2431         /* completion */
2432         if (qeth_alloc_cq(card))
2433                 goto out_freeoutq;
2434
2435         return 0;
2436
2437 out_freeoutqbufs:
2438         while (j > 0) {
2439                 --j;
2440                 kmem_cache_free(qeth_qdio_outbuf_cache,
2441                                 card->qdio.out_qs[i]->bufs[j]);
2442                 card->qdio.out_qs[i]->bufs[j] = NULL;
2443         }
2444 out_freeoutq:
2445         while (i > 0) {
2446                 qeth_free_output_queue(card->qdio.out_qs[--i]);
2447                 card->qdio.out_qs[i] = NULL;
2448         }
2449         qeth_free_buffer_pool(card);
2450 out_freeinq:
2451         qeth_free_qdio_queue(card->qdio.in_q);
2452         card->qdio.in_q = NULL;
2453 out_nomem:
2454         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
2455         return -ENOMEM;
2456 }
2457
2458 static void qeth_free_qdio_buffers(struct qeth_card *card)
2459 {
2460         int i, j;
2461
2462         if (atomic_xchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED) ==
2463                 QETH_QDIO_UNINITIALIZED)
2464                 return;
2465
2466         qeth_free_cq(card);
2467         cancel_delayed_work_sync(&card->buffer_reclaim_work);
2468         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2469                 if (card->qdio.in_q->bufs[j].rx_skb)
2470                         dev_kfree_skb_any(card->qdio.in_q->bufs[j].rx_skb);
2471         }
2472         qeth_free_qdio_queue(card->qdio.in_q);
2473         card->qdio.in_q = NULL;
2474         /* inbound buffer pool */
2475         qeth_free_buffer_pool(card);
2476         /* free outbound qdio_qs */
2477         for (i = 0; i < card->qdio.no_out_queues; i++) {
2478                 qeth_free_output_queue(card->qdio.out_qs[i]);
2479                 card->qdio.out_qs[i] = NULL;
2480         }
2481 }
2482
2483 static void qeth_create_qib_param_field(struct qeth_card *card,
2484                 char *param_field)
2485 {
2486
2487         param_field[0] = _ascebc['P'];
2488         param_field[1] = _ascebc['C'];
2489         param_field[2] = _ascebc['I'];
2490         param_field[3] = _ascebc['T'];
2491         *((unsigned int *) (&param_field[4])) = QETH_PCI_THRESHOLD_A(card);
2492         *((unsigned int *) (&param_field[8])) = QETH_PCI_THRESHOLD_B(card);
2493         *((unsigned int *) (&param_field[12])) = QETH_PCI_TIMER_VALUE(card);
2494 }
2495
2496 static void qeth_create_qib_param_field_blkt(struct qeth_card *card,
2497                 char *param_field)
2498 {
2499         param_field[16] = _ascebc['B'];
2500         param_field[17] = _ascebc['L'];
2501         param_field[18] = _ascebc['K'];
2502         param_field[19] = _ascebc['T'];
2503         *((unsigned int *) (&param_field[20])) = card->info.blkt.time_total;
2504         *((unsigned int *) (&param_field[24])) = card->info.blkt.inter_packet;
2505         *((unsigned int *) (&param_field[28])) =
2506                 card->info.blkt.inter_packet_jumbo;
2507 }
2508
2509 static int qeth_qdio_activate(struct qeth_card *card)
2510 {
2511         QETH_DBF_TEXT(SETUP, 3, "qdioact");
2512         return qdio_activate(CARD_DDEV(card));
2513 }
2514
2515 static int qeth_dm_act(struct qeth_card *card)
2516 {
2517         int rc;
2518         struct qeth_cmd_buffer *iob;
2519
2520         QETH_DBF_TEXT(SETUP, 2, "dmact");
2521
2522         iob = qeth_wait_for_buffer(&card->write);
2523         memcpy(iob->data, DM_ACT, DM_ACT_SIZE);
2524
2525         memcpy(QETH_DM_ACT_DEST_ADDR(iob->data),
2526                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2527         memcpy(QETH_DM_ACT_CONNECTION_TOKEN(iob->data),
2528                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2529         rc = qeth_send_control_data(card, DM_ACT_SIZE, iob, NULL, NULL);
2530         return rc;
2531 }
2532
2533 static int qeth_mpc_initialize(struct qeth_card *card)
2534 {
2535         int rc;
2536
2537         QETH_DBF_TEXT(SETUP, 2, "mpcinit");
2538
2539         rc = qeth_issue_next_read(card);
2540         if (rc) {
2541                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
2542                 return rc;
2543         }
2544         rc = qeth_cm_enable(card);
2545         if (rc) {
2546                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
2547                 goto out_qdio;
2548         }
2549         rc = qeth_cm_setup(card);
2550         if (rc) {
2551                 QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
2552                 goto out_qdio;
2553         }
2554         rc = qeth_ulp_enable(card);
2555         if (rc) {
2556                 QETH_DBF_TEXT_(SETUP, 2, "4err%d", rc);
2557                 goto out_qdio;
2558         }
2559         rc = qeth_ulp_setup(card);
2560         if (rc) {
2561                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
2562                 goto out_qdio;
2563         }
2564         rc = qeth_alloc_qdio_buffers(card);
2565         if (rc) {
2566                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
2567                 goto out_qdio;
2568         }
2569         rc = qeth_qdio_establish(card);
2570         if (rc) {
2571                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
2572                 qeth_free_qdio_buffers(card);
2573                 goto out_qdio;
2574         }
2575         rc = qeth_qdio_activate(card);
2576         if (rc) {
2577                 QETH_DBF_TEXT_(SETUP, 2, "7err%d", rc);
2578                 goto out_qdio;
2579         }
2580         rc = qeth_dm_act(card);
2581         if (rc) {
2582                 QETH_DBF_TEXT_(SETUP, 2, "8err%d", rc);
2583                 goto out_qdio;
2584         }
2585
2586         return 0;
2587 out_qdio:
2588         qeth_qdio_clear_card(card, card->info.type != QETH_CARD_TYPE_IQD);
2589         qdio_free(CARD_DDEV(card));
2590         return rc;
2591 }
2592
2593 void qeth_print_status_message(struct qeth_card *card)
2594 {
2595         switch (card->info.type) {
2596         case QETH_CARD_TYPE_OSD:
2597         case QETH_CARD_TYPE_OSM:
2598         case QETH_CARD_TYPE_OSX:
2599                 /* VM will use a non-zero first character
2600                  * to indicate a HiperSockets like reporting
2601                  * of the level OSA sets the first character to zero
2602                  * */
2603                 if (!card->info.mcl_level[0]) {
2604                         sprintf(card->info.mcl_level, "%02x%02x",
2605                                 card->info.mcl_level[2],
2606                                 card->info.mcl_level[3]);
2607                         break;
2608                 }
2609                 /* fallthrough */
2610         case QETH_CARD_TYPE_IQD:
2611                 if ((card->info.guestlan) ||
2612                     (card->info.mcl_level[0] & 0x80)) {
2613                         card->info.mcl_level[0] = (char) _ebcasc[(__u8)
2614                                 card->info.mcl_level[0]];
2615                         card->info.mcl_level[1] = (char) _ebcasc[(__u8)
2616                                 card->info.mcl_level[1]];
2617                         card->info.mcl_level[2] = (char) _ebcasc[(__u8)
2618                                 card->info.mcl_level[2]];
2619                         card->info.mcl_level[3] = (char) _ebcasc[(__u8)
2620                                 card->info.mcl_level[3]];
2621                         card->info.mcl_level[QETH_MCL_LENGTH] = 0;
2622                 }
2623                 break;
2624         default:
2625                 memset(&card->info.mcl_level[0], 0, QETH_MCL_LENGTH + 1);
2626         }
2627         dev_info(&card->gdev->dev,
2628                  "Device is a%s card%s%s%s\nwith link type %s.\n",
2629                  qeth_get_cardname(card),
2630                  (card->info.mcl_level[0]) ? " (level: " : "",
2631                  (card->info.mcl_level[0]) ? card->info.mcl_level : "",
2632                  (card->info.mcl_level[0]) ? ")" : "",
2633                  qeth_get_cardname_short(card));
2634 }
2635 EXPORT_SYMBOL_GPL(qeth_print_status_message);
2636
2637 static void qeth_initialize_working_pool_list(struct qeth_card *card)
2638 {
2639         struct qeth_buffer_pool_entry *entry;
2640
2641         QETH_CARD_TEXT(card, 5, "inwrklst");
2642
2643         list_for_each_entry(entry,
2644                             &card->qdio.init_pool.entry_list, init_list) {
2645                 qeth_put_buffer_pool_entry(card, entry);
2646         }
2647 }
2648
2649 static struct qeth_buffer_pool_entry *qeth_find_free_buffer_pool_entry(
2650                                         struct qeth_card *card)
2651 {
2652         struct list_head *plh;
2653         struct qeth_buffer_pool_entry *entry;
2654         int i, free;
2655         struct page *page;
2656
2657         if (list_empty(&card->qdio.in_buf_pool.entry_list))
2658                 return NULL;
2659
2660         list_for_each(plh, &card->qdio.in_buf_pool.entry_list) {
2661                 entry = list_entry(plh, struct qeth_buffer_pool_entry, list);
2662                 free = 1;
2663                 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2664                         if (page_count(virt_to_page(entry->elements[i])) > 1) {
2665                                 free = 0;
2666                                 break;
2667                         }
2668                 }
2669                 if (free) {
2670                         list_del_init(&entry->list);
2671                         return entry;
2672                 }
2673         }
2674
2675         /* no free buffer in pool so take first one and swap pages */
2676         entry = list_entry(card->qdio.in_buf_pool.entry_list.next,
2677                         struct qeth_buffer_pool_entry, list);
2678         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2679                 if (page_count(virt_to_page(entry->elements[i])) > 1) {
2680                         page = alloc_page(GFP_ATOMIC);
2681                         if (!page) {
2682                                 return NULL;
2683                         } else {
2684                                 free_page((unsigned long)entry->elements[i]);
2685                                 entry->elements[i] = page_address(page);
2686                                 QETH_CARD_STAT_INC(card, rx_sg_alloc_page);
2687                         }
2688                 }
2689         }
2690         list_del_init(&entry->list);
2691         return entry;
2692 }
2693
2694 static int qeth_init_input_buffer(struct qeth_card *card,
2695                 struct qeth_qdio_buffer *buf)
2696 {
2697         struct qeth_buffer_pool_entry *pool_entry;
2698         int i;
2699
2700         if ((card->options.cq == QETH_CQ_ENABLED) && (!buf->rx_skb)) {
2701                 buf->rx_skb = netdev_alloc_skb(card->dev,
2702                                                QETH_RX_PULL_LEN + ETH_HLEN);
2703                 if (!buf->rx_skb)
2704                         return 1;
2705         }
2706
2707         pool_entry = qeth_find_free_buffer_pool_entry(card);
2708         if (!pool_entry)
2709                 return 1;
2710
2711         /*
2712          * since the buffer is accessed only from the input_tasklet
2713          * there shouldn't be a need to synchronize; also, since we use
2714          * the QETH_IN_BUF_REQUEUE_THRESHOLD we should never run  out off
2715          * buffers
2716          */
2717
2718         buf->pool_entry = pool_entry;
2719         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2720                 buf->buffer->element[i].length = PAGE_SIZE;
2721                 buf->buffer->element[i].addr =  pool_entry->elements[i];
2722                 if (i == QETH_MAX_BUFFER_ELEMENTS(card) - 1)
2723                         buf->buffer->element[i].eflags = SBAL_EFLAGS_LAST_ENTRY;
2724                 else
2725                         buf->buffer->element[i].eflags = 0;
2726                 buf->buffer->element[i].sflags = 0;
2727         }
2728         return 0;
2729 }
2730
2731 int qeth_init_qdio_queues(struct qeth_card *card)
2732 {
2733         int i, j;
2734         int rc;
2735
2736         QETH_DBF_TEXT(SETUP, 2, "initqdqs");
2737
2738         /* inbound queue */
2739         qdio_reset_buffers(card->qdio.in_q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2740         memset(&card->rx, 0, sizeof(struct qeth_rx));
2741         qeth_initialize_working_pool_list(card);
2742         /*give only as many buffers to hardware as we have buffer pool entries*/
2743         for (i = 0; i < card->qdio.in_buf_pool.buf_count - 1; ++i)
2744                 qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]);
2745         card->qdio.in_q->next_buf_to_init =
2746                 card->qdio.in_buf_pool.buf_count - 1;
2747         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0, 0,
2748                      card->qdio.in_buf_pool.buf_count - 1);
2749         if (rc) {
2750                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
2751                 return rc;
2752         }
2753
2754         /* completion */
2755         rc = qeth_cq_init(card);
2756         if (rc) {
2757                 return rc;
2758         }
2759
2760         /* outbound queue */
2761         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2762                 qdio_reset_buffers(card->qdio.out_qs[i]->qdio_bufs,
2763                                    QDIO_MAX_BUFFERS_PER_Q);
2764                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2765                         qeth_clear_output_buffer(card->qdio.out_qs[i],
2766                                                  card->qdio.out_qs[i]->bufs[j]);
2767                 }
2768                 card->qdio.out_qs[i]->card = card;
2769                 card->qdio.out_qs[i]->next_buf_to_fill = 0;
2770                 card->qdio.out_qs[i]->do_pack = 0;
2771                 atomic_set(&card->qdio.out_qs[i]->used_buffers, 0);
2772                 atomic_set(&card->qdio.out_qs[i]->set_pci_flags_count, 0);
2773                 atomic_set(&card->qdio.out_qs[i]->state,
2774                            QETH_OUT_Q_UNLOCKED);
2775         }
2776         return 0;
2777 }
2778 EXPORT_SYMBOL_GPL(qeth_init_qdio_queues);
2779
2780 static __u8 qeth_get_ipa_adp_type(enum qeth_link_types link_type)
2781 {
2782         switch (link_type) {
2783         case QETH_LINK_TYPE_HSTR:
2784                 return 2;
2785         default:
2786                 return 1;
2787         }
2788 }
2789
2790 static void qeth_fill_ipacmd_header(struct qeth_card *card,
2791                                     struct qeth_ipa_cmd *cmd,
2792                                     enum qeth_ipa_cmds command,
2793                                     enum qeth_prot_versions prot)
2794 {
2795         cmd->hdr.command = command;
2796         cmd->hdr.initiator = IPA_CMD_INITIATOR_HOST;
2797         /* cmd->hdr.seqno is set by qeth_send_control_data() */
2798         cmd->hdr.adapter_type = qeth_get_ipa_adp_type(card->info.link_type);
2799         cmd->hdr.rel_adapter_no = (u8) card->dev->dev_port;
2800         cmd->hdr.prim_version_no = IS_LAYER2(card) ? 2 : 1;
2801         cmd->hdr.param_count = 1;
2802         cmd->hdr.prot_version = prot;
2803 }
2804
2805 void qeth_prepare_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
2806                           u16 cmd_length)
2807 {
2808         u16 total_length = IPA_PDU_HEADER_SIZE + cmd_length;
2809         u8 prot_type = qeth_mpc_select_prot_type(card);
2810
2811         memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
2812         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &total_length, 2);
2813         memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1);
2814         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &cmd_length, 2);
2815         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &cmd_length, 2);
2816         memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
2817                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2818         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &cmd_length, 2);
2819 }
2820 EXPORT_SYMBOL_GPL(qeth_prepare_ipa_cmd);
2821
2822 struct qeth_cmd_buffer *qeth_get_ipacmd_buffer(struct qeth_card *card,
2823                 enum qeth_ipa_cmds ipacmd, enum qeth_prot_versions prot)
2824 {
2825         struct qeth_cmd_buffer *iob;
2826
2827         iob = qeth_get_buffer(&card->write);
2828         if (iob) {
2829                 qeth_prepare_ipa_cmd(card, iob, sizeof(struct qeth_ipa_cmd));
2830                 qeth_fill_ipacmd_header(card, __ipa_cmd(iob), ipacmd, prot);
2831         } else {
2832                 dev_warn(&card->gdev->dev,
2833                          "The qeth driver ran out of channel command buffers\n");
2834                 QETH_DBF_MESSAGE(1, "device %x ran out of channel command buffers",
2835                                  CARD_DEVID(card));
2836         }
2837
2838         return iob;
2839 }
2840 EXPORT_SYMBOL_GPL(qeth_get_ipacmd_buffer);
2841
2842 static int qeth_send_ipa_cmd_cb(struct qeth_card *card,
2843                                 struct qeth_reply *reply, unsigned long data)
2844 {
2845         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2846
2847         return (cmd->hdr.return_code) ? -EIO : 0;
2848 }
2849
2850 /**
2851  * qeth_send_ipa_cmd() - send an IPA command
2852  *
2853  * See qeth_send_control_data() for explanation of the arguments.
2854  */
2855
2856 int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
2857                 int (*reply_cb)(struct qeth_card *, struct qeth_reply*,
2858                         unsigned long),
2859                 void *reply_param)
2860 {
2861         u16 length;
2862         int rc;
2863
2864         QETH_CARD_TEXT(card, 4, "sendipa");
2865
2866         if (reply_cb == NULL)
2867                 reply_cb = qeth_send_ipa_cmd_cb;
2868         memcpy(&length, QETH_IPA_PDU_LEN_TOTAL(iob->data), 2);
2869         rc = qeth_send_control_data(card, length, iob, reply_cb, reply_param);
2870         if (rc == -ETIME) {
2871                 qeth_clear_ipacmd_list(card);
2872                 qeth_schedule_recovery(card);
2873         }
2874         return rc;
2875 }
2876 EXPORT_SYMBOL_GPL(qeth_send_ipa_cmd);
2877
2878 static int qeth_send_startlan_cb(struct qeth_card *card,
2879                                  struct qeth_reply *reply, unsigned long data)
2880 {
2881         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2882
2883         if (cmd->hdr.return_code == IPA_RC_LAN_OFFLINE)
2884                 return -ENETDOWN;
2885
2886         return (cmd->hdr.return_code) ? -EIO : 0;
2887 }
2888
2889 static int qeth_send_startlan(struct qeth_card *card)
2890 {
2891         struct qeth_cmd_buffer *iob;
2892
2893         QETH_DBF_TEXT(SETUP, 2, "strtlan");
2894
2895         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_STARTLAN, 0);
2896         if (!iob)
2897                 return -ENOMEM;
2898         return qeth_send_ipa_cmd(card, iob, qeth_send_startlan_cb, NULL);
2899 }
2900
2901 static int qeth_setadpparms_inspect_rc(struct qeth_ipa_cmd *cmd)
2902 {
2903         if (!cmd->hdr.return_code)
2904                 cmd->hdr.return_code =
2905                         cmd->data.setadapterparms.hdr.return_code;
2906         return cmd->hdr.return_code;
2907 }
2908
2909 static int qeth_query_setadapterparms_cb(struct qeth_card *card,
2910                 struct qeth_reply *reply, unsigned long data)
2911 {
2912         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2913
2914         QETH_CARD_TEXT(card, 3, "quyadpcb");
2915         if (qeth_setadpparms_inspect_rc(cmd))
2916                 return -EIO;
2917
2918         if (cmd->data.setadapterparms.data.query_cmds_supp.lan_type & 0x7f) {
2919                 card->info.link_type =
2920                       cmd->data.setadapterparms.data.query_cmds_supp.lan_type;
2921                 QETH_DBF_TEXT_(SETUP, 2, "lnk %d", card->info.link_type);
2922         }
2923         card->options.adp.supported_funcs =
2924                 cmd->data.setadapterparms.data.query_cmds_supp.supported_cmds;
2925         return 0;
2926 }
2927
2928 static struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card,
2929                 __u32 command, __u32 cmdlen)
2930 {
2931         struct qeth_cmd_buffer *iob;
2932         struct qeth_ipa_cmd *cmd;
2933
2934         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SETADAPTERPARMS,
2935                                      QETH_PROT_IPV4);
2936         if (iob) {
2937                 cmd = __ipa_cmd(iob);
2938                 cmd->data.setadapterparms.hdr.cmdlength = cmdlen;
2939                 cmd->data.setadapterparms.hdr.command_code = command;
2940                 cmd->data.setadapterparms.hdr.used_total = 1;
2941                 cmd->data.setadapterparms.hdr.seq_no = 1;
2942         }
2943
2944         return iob;
2945 }
2946
2947 static int qeth_query_setadapterparms(struct qeth_card *card)
2948 {
2949         int rc;
2950         struct qeth_cmd_buffer *iob;
2951
2952         QETH_CARD_TEXT(card, 3, "queryadp");
2953         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_COMMANDS_SUPPORTED,
2954                                    sizeof(struct qeth_ipacmd_setadpparms));
2955         if (!iob)
2956                 return -ENOMEM;
2957         rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL);
2958         return rc;
2959 }
2960
2961 static int qeth_query_ipassists_cb(struct qeth_card *card,
2962                 struct qeth_reply *reply, unsigned long data)
2963 {
2964         struct qeth_ipa_cmd *cmd;
2965
2966         QETH_DBF_TEXT(SETUP, 2, "qipasscb");
2967
2968         cmd = (struct qeth_ipa_cmd *) data;
2969
2970         switch (cmd->hdr.return_code) {
2971         case IPA_RC_SUCCESS:
2972                 break;
2973         case IPA_RC_NOTSUPP:
2974         case IPA_RC_L2_UNSUPPORTED_CMD:
2975                 QETH_DBF_TEXT(SETUP, 2, "ipaunsup");
2976                 card->options.ipa4.supported_funcs |= IPA_SETADAPTERPARMS;
2977                 card->options.ipa6.supported_funcs |= IPA_SETADAPTERPARMS;
2978                 return -EOPNOTSUPP;
2979         default:
2980                 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Unhandled rc=%#x\n",
2981                                  CARD_DEVID(card), cmd->hdr.return_code);
2982                 return -EIO;
2983         }
2984
2985         if (cmd->hdr.prot_version == QETH_PROT_IPV4) {
2986                 card->options.ipa4.supported_funcs = cmd->hdr.ipa_supported;
2987                 card->options.ipa4.enabled_funcs = cmd->hdr.ipa_enabled;
2988         } else if (cmd->hdr.prot_version == QETH_PROT_IPV6) {
2989                 card->options.ipa6.supported_funcs = cmd->hdr.ipa_supported;
2990                 card->options.ipa6.enabled_funcs = cmd->hdr.ipa_enabled;
2991         } else
2992                 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Flawed LIC detected\n",
2993                                  CARD_DEVID(card));
2994         return 0;
2995 }
2996
2997 static int qeth_query_ipassists(struct qeth_card *card,
2998                                 enum qeth_prot_versions prot)
2999 {
3000         int rc;
3001         struct qeth_cmd_buffer *iob;
3002
3003         QETH_DBF_TEXT_(SETUP, 2, "qipassi%i", prot);
3004         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_QIPASSIST, prot);
3005         if (!iob)
3006                 return -ENOMEM;
3007         rc = qeth_send_ipa_cmd(card, iob, qeth_query_ipassists_cb, NULL);
3008         return rc;
3009 }
3010
3011 static int qeth_query_switch_attributes_cb(struct qeth_card *card,
3012                                 struct qeth_reply *reply, unsigned long data)
3013 {
3014         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3015         struct qeth_query_switch_attributes *attrs;
3016         struct qeth_switch_info *sw_info;
3017
3018         QETH_CARD_TEXT(card, 2, "qswiatcb");
3019         if (qeth_setadpparms_inspect_rc(cmd))
3020                 return -EIO;
3021
3022         sw_info = (struct qeth_switch_info *)reply->param;
3023         attrs = &cmd->data.setadapterparms.data.query_switch_attributes;
3024         sw_info->capabilities = attrs->capabilities;
3025         sw_info->settings = attrs->settings;
3026         QETH_CARD_TEXT_(card, 2, "%04x%04x", sw_info->capabilities,
3027                         sw_info->settings);
3028         return 0;
3029 }
3030
3031 int qeth_query_switch_attributes(struct qeth_card *card,
3032                                  struct qeth_switch_info *sw_info)
3033 {
3034         struct qeth_cmd_buffer *iob;
3035
3036         QETH_CARD_TEXT(card, 2, "qswiattr");
3037         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES))
3038                 return -EOPNOTSUPP;
3039         if (!netif_carrier_ok(card->dev))
3040                 return -ENOMEDIUM;
3041         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES,
3042                                 sizeof(struct qeth_ipacmd_setadpparms_hdr));
3043         if (!iob)
3044                 return -ENOMEM;
3045         return qeth_send_ipa_cmd(card, iob,
3046                                 qeth_query_switch_attributes_cb, sw_info);
3047 }
3048
3049 static int qeth_query_setdiagass_cb(struct qeth_card *card,
3050                 struct qeth_reply *reply, unsigned long data)
3051 {
3052         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3053         u16 rc = cmd->hdr.return_code;
3054
3055         if (rc) {
3056                 QETH_CARD_TEXT_(card, 2, "diagq:%x", rc);
3057                 return -EIO;
3058         }
3059
3060         card->info.diagass_support = cmd->data.diagass.ext;
3061         return 0;
3062 }
3063
3064 static int qeth_query_setdiagass(struct qeth_card *card)
3065 {
3066         struct qeth_cmd_buffer *iob;
3067         struct qeth_ipa_cmd    *cmd;
3068
3069         QETH_DBF_TEXT(SETUP, 2, "qdiagass");
3070         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SET_DIAG_ASS, 0);
3071         if (!iob)
3072                 return -ENOMEM;
3073         cmd = __ipa_cmd(iob);
3074         cmd->data.diagass.subcmd_len = 16;
3075         cmd->data.diagass.subcmd = QETH_DIAGS_CMD_QUERY;
3076         return qeth_send_ipa_cmd(card, iob, qeth_query_setdiagass_cb, NULL);
3077 }
3078
3079 static void qeth_get_trap_id(struct qeth_card *card, struct qeth_trap_id *tid)
3080 {
3081         unsigned long info = get_zeroed_page(GFP_KERNEL);
3082         struct sysinfo_2_2_2 *info222 = (struct sysinfo_2_2_2 *)info;
3083         struct sysinfo_3_2_2 *info322 = (struct sysinfo_3_2_2 *)info;
3084         struct ccw_dev_id ccwid;
3085         int level;
3086
3087         tid->chpid = card->info.chpid;
3088         ccw_device_get_id(CARD_RDEV(card), &ccwid);
3089         tid->ssid = ccwid.ssid;
3090         tid->devno = ccwid.devno;
3091         if (!info)
3092                 return;
3093         level = stsi(NULL, 0, 0, 0);
3094         if ((level >= 2) && (stsi(info222, 2, 2, 2) == 0))
3095                 tid->lparnr = info222->lpar_number;
3096         if ((level >= 3) && (stsi(info322, 3, 2, 2) == 0)) {
3097                 EBCASC(info322->vm[0].name, sizeof(info322->vm[0].name));
3098                 memcpy(tid->vmname, info322->vm[0].name, sizeof(tid->vmname));
3099         }
3100         free_page(info);
3101         return;
3102 }
3103
3104 static int qeth_hw_trap_cb(struct qeth_card *card,
3105                 struct qeth_reply *reply, unsigned long data)
3106 {
3107         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3108         u16 rc = cmd->hdr.return_code;
3109
3110         if (rc) {
3111                 QETH_CARD_TEXT_(card, 2, "trapc:%x", rc);
3112                 return -EIO;
3113         }
3114         return 0;
3115 }
3116
3117 int qeth_hw_trap(struct qeth_card *card, enum qeth_diags_trap_action action)
3118 {
3119         struct qeth_cmd_buffer *iob;
3120         struct qeth_ipa_cmd *cmd;
3121
3122         QETH_DBF_TEXT(SETUP, 2, "diagtrap");
3123         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SET_DIAG_ASS, 0);
3124         if (!iob)
3125                 return -ENOMEM;
3126         cmd = __ipa_cmd(iob);
3127         cmd->data.diagass.subcmd_len = 80;
3128         cmd->data.diagass.subcmd = QETH_DIAGS_CMD_TRAP;
3129         cmd->data.diagass.type = 1;
3130         cmd->data.diagass.action = action;
3131         switch (action) {
3132         case QETH_DIAGS_TRAP_ARM:
3133                 cmd->data.diagass.options = 0x0003;
3134                 cmd->data.diagass.ext = 0x00010000 +
3135                         sizeof(struct qeth_trap_id);
3136                 qeth_get_trap_id(card,
3137                         (struct qeth_trap_id *)cmd->data.diagass.cdata);
3138                 break;
3139         case QETH_DIAGS_TRAP_DISARM:
3140                 cmd->data.diagass.options = 0x0001;
3141                 break;
3142         case QETH_DIAGS_TRAP_CAPTURE:
3143                 break;
3144         }
3145         return qeth_send_ipa_cmd(card, iob, qeth_hw_trap_cb, NULL);
3146 }
3147 EXPORT_SYMBOL_GPL(qeth_hw_trap);
3148
3149 static int qeth_check_qdio_errors(struct qeth_card *card,
3150                                   struct qdio_buffer *buf,
3151                                   unsigned int qdio_error,
3152                                   const char *dbftext)
3153 {
3154         if (qdio_error) {
3155                 QETH_CARD_TEXT(card, 2, dbftext);
3156                 QETH_CARD_TEXT_(card, 2, " F15=%02X",
3157                                buf->element[15].sflags);
3158                 QETH_CARD_TEXT_(card, 2, " F14=%02X",
3159                                buf->element[14].sflags);
3160                 QETH_CARD_TEXT_(card, 2, " qerr=%X", qdio_error);
3161                 if ((buf->element[15].sflags) == 0x12) {
3162                         QETH_CARD_STAT_INC(card, rx_dropped);
3163                         return 0;
3164                 } else
3165                         return 1;
3166         }
3167         return 0;
3168 }
3169
3170 static void qeth_queue_input_buffer(struct qeth_card *card, int index)
3171 {
3172         struct qeth_qdio_q *queue = card->qdio.in_q;
3173         struct list_head *lh;
3174         int count;
3175         int i;
3176         int rc;
3177         int newcount = 0;
3178
3179         count = (index < queue->next_buf_to_init)?
3180                 card->qdio.in_buf_pool.buf_count -
3181                 (queue->next_buf_to_init - index) :
3182                 card->qdio.in_buf_pool.buf_count -
3183                 (queue->next_buf_to_init + QDIO_MAX_BUFFERS_PER_Q - index);
3184         /* only requeue at a certain threshold to avoid SIGAs */
3185         if (count >= QETH_IN_BUF_REQUEUE_THRESHOLD(card)) {
3186                 for (i = queue->next_buf_to_init;
3187                      i < queue->next_buf_to_init + count; ++i) {
3188                         if (qeth_init_input_buffer(card,
3189                                 &queue->bufs[i % QDIO_MAX_BUFFERS_PER_Q])) {
3190                                 break;
3191                         } else {
3192                                 newcount++;
3193                         }
3194                 }
3195
3196                 if (newcount < count) {
3197                         /* we are in memory shortage so we switch back to
3198                            traditional skb allocation and drop packages */
3199                         atomic_set(&card->force_alloc_skb, 3);
3200                         count = newcount;
3201                 } else {
3202                         atomic_add_unless(&card->force_alloc_skb, -1, 0);
3203                 }
3204
3205                 if (!count) {
3206                         i = 0;
3207                         list_for_each(lh, &card->qdio.in_buf_pool.entry_list)
3208                                 i++;
3209                         if (i == card->qdio.in_buf_pool.buf_count) {
3210                                 QETH_CARD_TEXT(card, 2, "qsarbw");
3211                                 card->reclaim_index = index;
3212                                 schedule_delayed_work(
3213                                         &card->buffer_reclaim_work,
3214                                         QETH_RECLAIM_WORK_TIME);
3215                         }
3216                         return;
3217                 }
3218
3219                 /*
3220                  * according to old code it should be avoided to requeue all
3221                  * 128 buffers in order to benefit from PCI avoidance.
3222                  * this function keeps at least one buffer (the buffer at
3223                  * 'index') un-requeued -> this buffer is the first buffer that
3224                  * will be requeued the next time
3225                  */
3226                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0,
3227                              queue->next_buf_to_init, count);
3228                 if (rc) {
3229                         QETH_CARD_TEXT(card, 2, "qinberr");
3230                 }
3231                 queue->next_buf_to_init = (queue->next_buf_to_init + count) %
3232                                           QDIO_MAX_BUFFERS_PER_Q;
3233         }
3234 }
3235
3236 static void qeth_buffer_reclaim_work(struct work_struct *work)
3237 {
3238         struct qeth_card *card = container_of(work, struct qeth_card,
3239                 buffer_reclaim_work.work);
3240
3241         QETH_CARD_TEXT_(card, 2, "brw:%x", card->reclaim_index);
3242         qeth_queue_input_buffer(card, card->reclaim_index);
3243 }
3244
3245 static void qeth_handle_send_error(struct qeth_card *card,
3246                 struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err)
3247 {
3248         int sbalf15 = buffer->buffer->element[15].sflags;
3249
3250         QETH_CARD_TEXT(card, 6, "hdsnderr");
3251         if (card->info.type == QETH_CARD_TYPE_IQD) {
3252                 if (sbalf15 == 0) {
3253                         qdio_err = 0;
3254                 } else {
3255                         qdio_err = 1;
3256                 }
3257         }
3258         qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr");
3259
3260         if (!qdio_err)
3261                 return;
3262
3263         if ((sbalf15 >= 15) && (sbalf15 <= 31))
3264                 return;
3265
3266         QETH_CARD_TEXT(card, 1, "lnkfail");
3267         QETH_CARD_TEXT_(card, 1, "%04x %02x",
3268                        (u16)qdio_err, (u8)sbalf15);
3269 }
3270
3271 /**
3272  * qeth_prep_flush_pack_buffer - Prepares flushing of a packing buffer.
3273  * @queue: queue to check for packing buffer
3274  *
3275  * Returns number of buffers that were prepared for flush.
3276  */
3277 static int qeth_prep_flush_pack_buffer(struct qeth_qdio_out_q *queue)
3278 {
3279         struct qeth_qdio_out_buffer *buffer;
3280
3281         buffer = queue->bufs[queue->next_buf_to_fill];
3282         if ((atomic_read(&buffer->state) == QETH_QDIO_BUF_EMPTY) &&
3283             (buffer->next_element_to_fill > 0)) {
3284                 /* it's a packing buffer */
3285                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3286                 queue->next_buf_to_fill =
3287                         (queue->next_buf_to_fill + 1) % QDIO_MAX_BUFFERS_PER_Q;
3288                 return 1;
3289         }
3290         return 0;
3291 }
3292
3293 /*
3294  * Switched to packing state if the number of used buffers on a queue
3295  * reaches a certain limit.
3296  */
3297 static void qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q *queue)
3298 {
3299         if (!queue->do_pack) {
3300                 if (atomic_read(&queue->used_buffers)
3301                     >= QETH_HIGH_WATERMARK_PACK){
3302                         /* switch non-PACKING -> PACKING */
3303                         QETH_CARD_TEXT(queue->card, 6, "np->pack");
3304                         QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3305                         queue->do_pack = 1;
3306                 }
3307         }
3308 }
3309
3310 /*
3311  * Switches from packing to non-packing mode. If there is a packing
3312  * buffer on the queue this buffer will be prepared to be flushed.
3313  * In that case 1 is returned to inform the caller. If no buffer
3314  * has to be flushed, zero is returned.
3315  */
3316 static int qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q *queue)
3317 {
3318         if (queue->do_pack) {
3319                 if (atomic_read(&queue->used_buffers)
3320                     <= QETH_LOW_WATERMARK_PACK) {
3321                         /* switch PACKING -> non-PACKING */
3322                         QETH_CARD_TEXT(queue->card, 6, "pack->np");
3323                         QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3324                         queue->do_pack = 0;
3325                         return qeth_prep_flush_pack_buffer(queue);
3326                 }
3327         }
3328         return 0;
3329 }
3330
3331 static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
3332                                int count)
3333 {
3334         struct qeth_qdio_out_buffer *buf;
3335         int rc;
3336         int i;
3337         unsigned int qdio_flags;
3338
3339         for (i = index; i < index + count; ++i) {
3340                 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3341                 buf = queue->bufs[bidx];
3342                 buf->buffer->element[buf->next_element_to_fill - 1].eflags |=
3343                                 SBAL_EFLAGS_LAST_ENTRY;
3344
3345                 if (queue->bufstates)
3346                         queue->bufstates[bidx].user = buf;
3347
3348                 if (queue->card->info.type == QETH_CARD_TYPE_IQD)
3349                         continue;
3350
3351                 if (!queue->do_pack) {
3352                         if ((atomic_read(&queue->used_buffers) >=
3353                                 (QETH_HIGH_WATERMARK_PACK -
3354                                  QETH_WATERMARK_PACK_FUZZ)) &&
3355                             !atomic_read(&queue->set_pci_flags_count)) {
3356                                 /* it's likely that we'll go to packing
3357                                  * mode soon */
3358                                 atomic_inc(&queue->set_pci_flags_count);
3359                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3360                         }
3361                 } else {
3362                         if (!atomic_read(&queue->set_pci_flags_count)) {
3363                                 /*
3364                                  * there's no outstanding PCI any more, so we
3365                                  * have to request a PCI to be sure the the PCI
3366                                  * will wake at some time in the future then we
3367                                  * can flush packed buffers that might still be
3368                                  * hanging around, which can happen if no
3369                                  * further send was requested by the stack
3370                                  */
3371                                 atomic_inc(&queue->set_pci_flags_count);
3372                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3373                         }
3374                 }
3375         }
3376
3377         QETH_TXQ_STAT_ADD(queue, bufs, count);
3378         netif_trans_update(queue->card->dev);
3379         qdio_flags = QDIO_FLAG_SYNC_OUTPUT;
3380         if (atomic_read(&queue->set_pci_flags_count))
3381                 qdio_flags |= QDIO_FLAG_PCI_OUT;
3382         atomic_add(count, &queue->used_buffers);
3383         rc = do_QDIO(CARD_DDEV(queue->card), qdio_flags,
3384                      queue->queue_no, index, count);
3385         if (rc) {
3386                 QETH_TXQ_STAT_ADD(queue, tx_errors, count);
3387                 /* ignore temporary SIGA errors without busy condition */
3388                 if (rc == -ENOBUFS)
3389                         return;
3390                 QETH_CARD_TEXT(queue->card, 2, "flushbuf");
3391                 QETH_CARD_TEXT_(queue->card, 2, " q%d", queue->queue_no);
3392                 QETH_CARD_TEXT_(queue->card, 2, " idx%d", index);
3393                 QETH_CARD_TEXT_(queue->card, 2, " c%d", count);
3394                 QETH_CARD_TEXT_(queue->card, 2, " err%d", rc);
3395
3396                 /* this must not happen under normal circumstances. if it
3397                  * happens something is really wrong -> recover */
3398                 qeth_schedule_recovery(queue->card);
3399                 return;
3400         }
3401 }
3402
3403 static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue)
3404 {
3405         int index;
3406         int flush_cnt = 0;
3407         int q_was_packing = 0;
3408
3409         /*
3410          * check if weed have to switch to non-packing mode or if
3411          * we have to get a pci flag out on the queue
3412          */
3413         if ((atomic_read(&queue->used_buffers) <= QETH_LOW_WATERMARK_PACK) ||
3414             !atomic_read(&queue->set_pci_flags_count)) {
3415                 if (atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH) ==
3416                                 QETH_OUT_Q_UNLOCKED) {
3417                         /*
3418                          * If we get in here, there was no action in
3419                          * do_send_packet. So, we check if there is a
3420                          * packing buffer to be flushed here.
3421                          */
3422                         netif_stop_queue(queue->card->dev);
3423                         index = queue->next_buf_to_fill;
3424                         q_was_packing = queue->do_pack;
3425                         /* queue->do_pack may change */
3426                         barrier();
3427                         flush_cnt += qeth_switch_to_nonpacking_if_needed(queue);
3428                         if (!flush_cnt &&
3429                             !atomic_read(&queue->set_pci_flags_count))
3430                                 flush_cnt += qeth_prep_flush_pack_buffer(queue);
3431                         if (q_was_packing)
3432                                 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_cnt);
3433                         if (flush_cnt)
3434                                 qeth_flush_buffers(queue, index, flush_cnt);
3435                         atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
3436                 }
3437         }
3438 }
3439
3440 static void qeth_qdio_start_poll(struct ccw_device *ccwdev, int queue,
3441                                  unsigned long card_ptr)
3442 {
3443         struct qeth_card *card = (struct qeth_card *)card_ptr;
3444
3445         if (card->dev->flags & IFF_UP)
3446                 napi_schedule(&card->napi);
3447 }
3448
3449 int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq)
3450 {
3451         int rc;
3452
3453         if (card->options.cq ==  QETH_CQ_NOTAVAILABLE) {
3454                 rc = -1;
3455                 goto out;
3456         } else {
3457                 if (card->options.cq == cq) {
3458                         rc = 0;
3459                         goto out;
3460                 }
3461
3462                 if (card->state != CARD_STATE_DOWN) {
3463                         rc = -1;
3464                         goto out;
3465                 }
3466
3467                 qeth_free_qdio_buffers(card);
3468                 card->options.cq = cq;
3469                 rc = 0;
3470         }
3471 out:
3472         return rc;
3473
3474 }
3475 EXPORT_SYMBOL_GPL(qeth_configure_cq);
3476
3477 static void qeth_qdio_cq_handler(struct qeth_card *card, unsigned int qdio_err,
3478                                  unsigned int queue, int first_element,
3479                                  int count)
3480 {
3481         struct qeth_qdio_q *cq = card->qdio.c_q;
3482         int i;
3483         int rc;
3484
3485         if (!qeth_is_cq(card, queue))
3486                 return;
3487
3488         QETH_CARD_TEXT_(card, 5, "qcqhe%d", first_element);
3489         QETH_CARD_TEXT_(card, 5, "qcqhc%d", count);
3490         QETH_CARD_TEXT_(card, 5, "qcqherr%d", qdio_err);
3491
3492         if (qdio_err) {
3493                 netif_stop_queue(card->dev);
3494                 qeth_schedule_recovery(card);
3495                 return;
3496         }
3497
3498         for (i = first_element; i < first_element + count; ++i) {
3499                 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3500                 struct qdio_buffer *buffer = cq->qdio_bufs[bidx];
3501                 int e = 0;
3502
3503                 while ((e < QDIO_MAX_ELEMENTS_PER_BUFFER) &&
3504                        buffer->element[e].addr) {
3505                         unsigned long phys_aob_addr;
3506
3507                         phys_aob_addr = (unsigned long) buffer->element[e].addr;
3508                         qeth_qdio_handle_aob(card, phys_aob_addr);
3509                         ++e;
3510                 }
3511                 qeth_scrub_qdio_buffer(buffer, QDIO_MAX_ELEMENTS_PER_BUFFER);
3512         }
3513         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, queue,
3514                     card->qdio.c_q->next_buf_to_init,
3515                     count);
3516         if (rc) {
3517                 dev_warn(&card->gdev->dev,
3518                         "QDIO reported an error, rc=%i\n", rc);
3519                 QETH_CARD_TEXT(card, 2, "qcqherr");
3520         }
3521         card->qdio.c_q->next_buf_to_init = (card->qdio.c_q->next_buf_to_init
3522                                    + count) % QDIO_MAX_BUFFERS_PER_Q;
3523 }
3524
3525 static void qeth_qdio_input_handler(struct ccw_device *ccwdev,
3526                                     unsigned int qdio_err, int queue,
3527                                     int first_elem, int count,
3528                                     unsigned long card_ptr)
3529 {
3530         struct qeth_card *card = (struct qeth_card *)card_ptr;
3531
3532         QETH_CARD_TEXT_(card, 2, "qihq%d", queue);
3533         QETH_CARD_TEXT_(card, 2, "qiec%d", qdio_err);
3534
3535         if (qeth_is_cq(card, queue))
3536                 qeth_qdio_cq_handler(card, qdio_err, queue, first_elem, count);
3537         else if (qdio_err)
3538                 qeth_schedule_recovery(card);
3539 }
3540
3541 static void qeth_qdio_output_handler(struct ccw_device *ccwdev,
3542                                      unsigned int qdio_error, int __queue,
3543                                      int first_element, int count,
3544                                      unsigned long card_ptr)
3545 {
3546         struct qeth_card *card        = (struct qeth_card *) card_ptr;
3547         struct qeth_qdio_out_q *queue = card->qdio.out_qs[__queue];
3548         struct qeth_qdio_out_buffer *buffer;
3549         int i;
3550
3551         QETH_CARD_TEXT(card, 6, "qdouhdl");
3552         if (qdio_error & QDIO_ERROR_FATAL) {
3553                 QETH_CARD_TEXT(card, 2, "achkcond");
3554                 netif_stop_queue(card->dev);
3555                 qeth_schedule_recovery(card);
3556                 return;
3557         }
3558
3559         for (i = first_element; i < (first_element + count); ++i) {
3560                 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3561                 buffer = queue->bufs[bidx];
3562                 qeth_handle_send_error(card, buffer, qdio_error);
3563
3564                 if (queue->bufstates &&
3565                     (queue->bufstates[bidx].flags &
3566                      QDIO_OUTBUF_STATE_FLAG_PENDING) != 0) {
3567                         WARN_ON_ONCE(card->options.cq != QETH_CQ_ENABLED);
3568
3569                         if (atomic_cmpxchg(&buffer->state,
3570                                            QETH_QDIO_BUF_PRIMED,
3571                                            QETH_QDIO_BUF_PENDING) ==
3572                                 QETH_QDIO_BUF_PRIMED) {
3573                                 qeth_notify_skbs(queue, buffer,
3574                                                  TX_NOTIFY_PENDING);
3575                         }
3576                         QETH_CARD_TEXT_(queue->card, 5, "pel%d", bidx);
3577
3578                         /* prepare the queue slot for re-use: */
3579                         qeth_scrub_qdio_buffer(buffer->buffer,
3580                                                QETH_MAX_BUFFER_ELEMENTS(card));
3581                         if (qeth_init_qdio_out_buf(queue, bidx)) {
3582                                 QETH_CARD_TEXT(card, 2, "outofbuf");
3583                                 qeth_schedule_recovery(card);
3584                         }
3585                 } else {
3586                         if (card->options.cq == QETH_CQ_ENABLED) {
3587                                 enum iucv_tx_notify n;
3588
3589                                 n = qeth_compute_cq_notification(
3590                                         buffer->buffer->element[15].sflags, 0);
3591                                 qeth_notify_skbs(queue, buffer, n);
3592                         }
3593
3594                         qeth_clear_output_buffer(queue, buffer);
3595                 }
3596                 qeth_cleanup_handled_pending(queue, bidx, 0);
3597         }
3598         atomic_sub(count, &queue->used_buffers);
3599         /* check if we need to do something on this outbound queue */
3600         if (card->info.type != QETH_CARD_TYPE_IQD)
3601                 qeth_check_outbound_queue(queue);
3602
3603         netif_wake_queue(queue->card->dev);
3604 }
3605
3606 /* We cannot use outbound queue 3 for unicast packets on HiperSockets */
3607 static inline int qeth_cut_iqd_prio(struct qeth_card *card, int queue_num)
3608 {
3609         if ((card->info.type == QETH_CARD_TYPE_IQD) && (queue_num == 3))
3610                 return 2;
3611         return queue_num;
3612 }
3613
3614 /**
3615  * Note: Function assumes that we have 4 outbound queues.
3616  */
3617 int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb,
3618                             int ipv)
3619 {
3620         __be16 *tci;
3621         u8 tos;
3622
3623         switch (card->qdio.do_prio_queueing) {
3624         case QETH_PRIO_Q_ING_TOS:
3625         case QETH_PRIO_Q_ING_PREC:
3626                 switch (ipv) {
3627                 case 4:
3628                         tos = ipv4_get_dsfield(ip_hdr(skb));
3629                         break;
3630                 case 6:
3631                         tos = ipv6_get_dsfield(ipv6_hdr(skb));
3632                         break;
3633                 default:
3634                         return card->qdio.default_out_queue;
3635                 }
3636                 if (card->qdio.do_prio_queueing == QETH_PRIO_Q_ING_PREC)
3637                         return qeth_cut_iqd_prio(card, ~tos >> 6 & 3);
3638                 if (tos & IPTOS_MINCOST)
3639                         return qeth_cut_iqd_prio(card, 3);
3640                 if (tos & IPTOS_RELIABILITY)
3641                         return 2;
3642                 if (tos & IPTOS_THROUGHPUT)
3643                         return 1;
3644                 if (tos & IPTOS_LOWDELAY)
3645                         return 0;
3646                 break;
3647         case QETH_PRIO_Q_ING_SKB:
3648                 if (skb->priority > 5)
3649                         return 0;
3650                 return qeth_cut_iqd_prio(card, ~skb->priority >> 1 & 3);
3651         case QETH_PRIO_Q_ING_VLAN:
3652                 tci = &((struct ethhdr *)skb->data)->h_proto;
3653                 if (be16_to_cpu(*tci) == ETH_P_8021Q)
3654                         return qeth_cut_iqd_prio(card,
3655                         ~be16_to_cpu(*(tci + 1)) >> (VLAN_PRIO_SHIFT + 1) & 3);
3656                 break;
3657         default:
3658                 break;
3659         }
3660         return card->qdio.default_out_queue;
3661 }
3662 EXPORT_SYMBOL_GPL(qeth_get_priority_queue);
3663
3664 /**
3665  * qeth_get_elements_for_frags() -      find number of SBALEs for skb frags.
3666  * @skb:                                SKB address
3667  *
3668  * Returns the number of pages, and thus QDIO buffer elements, needed to cover
3669  * fragmented part of the SKB. Returns zero for linear SKB.
3670  */
3671 static int qeth_get_elements_for_frags(struct sk_buff *skb)
3672 {
3673         int cnt, elements = 0;
3674
3675         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3676                 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[cnt];
3677
3678                 elements += qeth_get_elements_for_range(
3679                         (addr_t)skb_frag_address(frag),
3680                         (addr_t)skb_frag_address(frag) + skb_frag_size(frag));
3681         }
3682         return elements;
3683 }
3684
3685 /**
3686  * qeth_count_elements() -      Counts the number of QDIO buffer elements needed
3687  *                              to transmit an skb.
3688  * @skb:                        the skb to operate on.
3689  * @data_offset:                skip this part of the skb's linear data
3690  *
3691  * Returns the number of pages, and thus QDIO buffer elements, needed to map the
3692  * skb's data (both its linear part and paged fragments).
3693  */
3694 unsigned int qeth_count_elements(struct sk_buff *skb, unsigned int data_offset)
3695 {
3696         unsigned int elements = qeth_get_elements_for_frags(skb);
3697         addr_t end = (addr_t)skb->data + skb_headlen(skb);
3698         addr_t start = (addr_t)skb->data + data_offset;
3699
3700         if (start != end)
3701                 elements += qeth_get_elements_for_range(start, end);
3702         return elements;
3703 }
3704 EXPORT_SYMBOL_GPL(qeth_count_elements);
3705
3706 #define QETH_HDR_CACHE_OBJ_SIZE         (sizeof(struct qeth_hdr_tso) + \
3707                                          MAX_TCP_HEADER)
3708
3709 /**
3710  * qeth_add_hw_header() - add a HW header to an skb.
3711  * @skb: skb that the HW header should be added to.
3712  * @hdr: double pointer to a qeth_hdr. When returning with >= 0,
3713  *       it contains a valid pointer to a qeth_hdr.
3714  * @hdr_len: length of the HW header.
3715  * @proto_len: length of protocol headers that need to be in same page as the
3716  *             HW header.
3717  *
3718  * Returns the pushed length. If the header can't be pushed on
3719  * (eg. because it would cross a page boundary), it is allocated from
3720  * the cache instead and 0 is returned.
3721  * The number of needed buffer elements is returned in @elements.
3722  * Error to create the hdr is indicated by returning with < 0.
3723  */
3724 static int qeth_add_hw_header(struct qeth_qdio_out_q *queue,
3725                               struct sk_buff *skb, struct qeth_hdr **hdr,
3726                               unsigned int hdr_len, unsigned int proto_len,
3727                               unsigned int *elements)
3728 {
3729         const unsigned int max_elements = QETH_MAX_BUFFER_ELEMENTS(queue->card);
3730         const unsigned int contiguous = proto_len ? proto_len : 1;
3731         unsigned int __elements;
3732         addr_t start, end;
3733         bool push_ok;
3734         int rc;
3735
3736 check_layout:
3737         start = (addr_t)skb->data - hdr_len;
3738         end = (addr_t)skb->data;
3739
3740         if (qeth_get_elements_for_range(start, end + contiguous) == 1) {
3741                 /* Push HW header into same page as first protocol header. */
3742                 push_ok = true;
3743                 /* ... but TSO always needs a separate element for headers: */
3744                 if (skb_is_gso(skb))
3745                         __elements = 1 + qeth_count_elements(skb, proto_len);
3746                 else
3747                         __elements = qeth_count_elements(skb, 0);
3748         } else if (!proto_len && qeth_get_elements_for_range(start, end) == 1) {
3749                 /* Push HW header into a new page. */
3750                 push_ok = true;
3751                 __elements = 1 + qeth_count_elements(skb, 0);
3752         } else {
3753                 /* Use header cache, copy protocol headers up. */
3754                 push_ok = false;
3755                 __elements = 1 + qeth_count_elements(skb, proto_len);
3756         }
3757
3758         /* Compress skb to fit into one IO buffer: */
3759         if (__elements > max_elements) {
3760                 if (!skb_is_nonlinear(skb)) {
3761                         /* Drop it, no easy way of shrinking it further. */
3762                         QETH_DBF_MESSAGE(2, "Dropped an oversized skb (Max Elements=%u / Actual=%u / Length=%u).\n",
3763                                          max_elements, __elements, skb->len);
3764                         return -E2BIG;
3765                 }
3766
3767                 rc = skb_linearize(skb);
3768                 if (rc) {
3769                         QETH_TXQ_STAT_INC(queue, skbs_linearized_fail);
3770                         return rc;
3771                 }
3772
3773                 QETH_TXQ_STAT_INC(queue, skbs_linearized);
3774                 /* Linearization changed the layout, re-evaluate: */
3775                 goto check_layout;
3776         }
3777
3778         *elements = __elements;
3779         /* Add the header: */
3780         if (push_ok) {
3781                 *hdr = skb_push(skb, hdr_len);
3782                 return hdr_len;
3783         }
3784         /* fall back */
3785         if (hdr_len + proto_len > QETH_HDR_CACHE_OBJ_SIZE)
3786                 return -E2BIG;
3787         *hdr = kmem_cache_alloc(qeth_core_header_cache, GFP_ATOMIC);
3788         if (!*hdr)
3789                 return -ENOMEM;
3790         /* Copy protocol headers behind HW header: */
3791         skb_copy_from_linear_data(skb, ((char *)*hdr) + hdr_len, proto_len);
3792         return 0;
3793 }
3794
3795 static void __qeth_fill_buffer(struct sk_buff *skb,
3796                                struct qeth_qdio_out_buffer *buf,
3797                                bool is_first_elem, unsigned int offset)
3798 {
3799         struct qdio_buffer *buffer = buf->buffer;
3800         int element = buf->next_element_to_fill;
3801         int length = skb_headlen(skb) - offset;
3802         char *data = skb->data + offset;
3803         int length_here, cnt;
3804
3805         /* map linear part into buffer element(s) */
3806         while (length > 0) {
3807                 /* length_here is the remaining amount of data in this page */
3808                 length_here = PAGE_SIZE - ((unsigned long) data % PAGE_SIZE);
3809                 if (length < length_here)
3810                         length_here = length;
3811
3812                 buffer->element[element].addr = data;
3813                 buffer->element[element].length = length_here;
3814                 length -= length_here;
3815                 if (is_first_elem) {
3816                         is_first_elem = false;
3817                         if (length || skb_is_nonlinear(skb))
3818                                 /* skb needs additional elements */
3819                                 buffer->element[element].eflags =
3820                                         SBAL_EFLAGS_FIRST_FRAG;
3821                         else
3822                                 buffer->element[element].eflags = 0;
3823                 } else {
3824                         buffer->element[element].eflags =
3825                                 SBAL_EFLAGS_MIDDLE_FRAG;
3826                 }
3827                 data += length_here;
3828                 element++;
3829         }
3830
3831         /* map page frags into buffer element(s) */
3832         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3833                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
3834
3835                 data = skb_frag_address(frag);
3836                 length = skb_frag_size(frag);
3837                 while (length > 0) {
3838                         length_here = PAGE_SIZE -
3839                                 ((unsigned long) data % PAGE_SIZE);
3840                         if (length < length_here)
3841                                 length_here = length;
3842
3843                         buffer->element[element].addr = data;
3844                         buffer->element[element].length = length_here;
3845                         buffer->element[element].eflags =
3846                                 SBAL_EFLAGS_MIDDLE_FRAG;
3847                         length -= length_here;
3848                         data += length_here;
3849                         element++;
3850                 }
3851         }
3852
3853         if (buffer->element[element - 1].eflags)
3854                 buffer->element[element - 1].eflags = SBAL_EFLAGS_LAST_FRAG;
3855         buf->next_element_to_fill = element;
3856 }
3857
3858 /**
3859  * qeth_fill_buffer() - map skb into an output buffer
3860  * @queue:      QDIO queue to submit the buffer on
3861  * @buf:        buffer to transport the skb
3862  * @skb:        skb to map into the buffer
3863  * @hdr:        qeth_hdr for this skb. Either at skb->data, or allocated
3864  *              from qeth_core_header_cache.
3865  * @offset:     when mapping the skb, start at skb->data + offset
3866  * @hd_len:     if > 0, build a dedicated header element of this size
3867  */
3868 static int qeth_fill_buffer(struct qeth_qdio_out_q *queue,
3869                             struct qeth_qdio_out_buffer *buf,
3870                             struct sk_buff *skb, struct qeth_hdr *hdr,
3871                             unsigned int offset, unsigned int hd_len)
3872 {
3873         struct qdio_buffer *buffer = buf->buffer;
3874         bool is_first_elem = true;
3875
3876         __skb_queue_tail(&buf->skb_list, skb);
3877
3878         /* build dedicated header element */
3879         if (hd_len) {
3880                 int element = buf->next_element_to_fill;
3881                 is_first_elem = false;
3882
3883                 buffer->element[element].addr = hdr;
3884                 buffer->element[element].length = hd_len;
3885                 buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
3886                 /* remember to free cache-allocated qeth_hdr: */
3887                 buf->is_header[element] = ((void *)hdr != skb->data);
3888                 buf->next_element_to_fill++;
3889         }
3890
3891         __qeth_fill_buffer(skb, buf, is_first_elem, offset);
3892
3893         if (!queue->do_pack) {
3894                 QETH_CARD_TEXT(queue->card, 6, "fillbfnp");
3895         } else {
3896                 QETH_CARD_TEXT(queue->card, 6, "fillbfpa");
3897
3898                 QETH_TXQ_STAT_INC(queue, skbs_pack);
3899                 /* If the buffer still has free elements, keep using it. */
3900                 if (buf->next_element_to_fill <
3901                     QETH_MAX_BUFFER_ELEMENTS(queue->card))
3902                         return 0;
3903         }
3904
3905         /* flush out the buffer */
3906         atomic_set(&buf->state, QETH_QDIO_BUF_PRIMED);
3907         queue->next_buf_to_fill = (queue->next_buf_to_fill + 1) %
3908                                   QDIO_MAX_BUFFERS_PER_Q;
3909         return 1;
3910 }
3911
3912 static int qeth_do_send_packet_fast(struct qeth_qdio_out_q *queue,
3913                                     struct sk_buff *skb, struct qeth_hdr *hdr,
3914                                     unsigned int offset, unsigned int hd_len)
3915 {
3916         int index = queue->next_buf_to_fill;
3917         struct qeth_qdio_out_buffer *buffer = queue->bufs[index];
3918
3919         /*
3920          * check if buffer is empty to make sure that we do not 'overtake'
3921          * ourselves and try to fill a buffer that is already primed
3922          */
3923         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
3924                 return -EBUSY;
3925         qeth_fill_buffer(queue, buffer, skb, hdr, offset, hd_len);
3926         qeth_flush_buffers(queue, index, 1);
3927         return 0;
3928 }
3929
3930 int qeth_do_send_packet(struct qeth_card *card, struct qeth_qdio_out_q *queue,
3931                         struct sk_buff *skb, struct qeth_hdr *hdr,
3932                         unsigned int offset, unsigned int hd_len,
3933                         int elements_needed)
3934 {
3935         struct qeth_qdio_out_buffer *buffer;
3936         int start_index;
3937         int flush_count = 0;
3938         int do_pack = 0;
3939         int tmp;
3940         int rc = 0;
3941
3942         /* spin until we get the queue ... */
3943         while (atomic_cmpxchg(&queue->state, QETH_OUT_Q_UNLOCKED,
3944                               QETH_OUT_Q_LOCKED) != QETH_OUT_Q_UNLOCKED);
3945         start_index = queue->next_buf_to_fill;
3946         buffer = queue->bufs[queue->next_buf_to_fill];
3947         /*
3948          * check if buffer is empty to make sure that we do not 'overtake'
3949          * ourselves and try to fill a buffer that is already primed
3950          */
3951         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY) {
3952                 atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
3953                 return -EBUSY;
3954         }
3955         /* check if we need to switch packing state of this queue */
3956         qeth_switch_to_packing_if_needed(queue);
3957         if (queue->do_pack) {
3958                 do_pack = 1;
3959                 /* does packet fit in current buffer? */
3960                 if ((QETH_MAX_BUFFER_ELEMENTS(card) -
3961                     buffer->next_element_to_fill) < elements_needed) {
3962                         /* ... no -> set state PRIMED */
3963                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3964                         flush_count++;
3965                         queue->next_buf_to_fill =
3966                                 (queue->next_buf_to_fill + 1) %
3967                                 QDIO_MAX_BUFFERS_PER_Q;
3968                         buffer = queue->bufs[queue->next_buf_to_fill];
3969                         /* we did a step forward, so check buffer state
3970                          * again */
3971                         if (atomic_read(&buffer->state) !=
3972                             QETH_QDIO_BUF_EMPTY) {
3973                                 qeth_flush_buffers(queue, start_index,
3974                                                            flush_count);
3975                                 atomic_set(&queue->state,
3976                                                 QETH_OUT_Q_UNLOCKED);
3977                                 rc = -EBUSY;
3978                                 goto out;
3979                         }
3980                 }
3981         }
3982
3983         flush_count += qeth_fill_buffer(queue, buffer, skb, hdr, offset,
3984                                         hd_len);
3985         if (flush_count)
3986                 qeth_flush_buffers(queue, start_index, flush_count);
3987         else if (!atomic_read(&queue->set_pci_flags_count))
3988                 atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH);
3989         /*
3990          * queue->state will go from LOCKED -> UNLOCKED or from
3991          * LOCKED_FLUSH -> LOCKED if output_handler wanted to 'notify' us
3992          * (switch packing state or flush buffer to get another pci flag out).
3993          * In that case we will enter this loop
3994          */
3995         while (atomic_dec_return(&queue->state)) {
3996                 start_index = queue->next_buf_to_fill;
3997                 /* check if we can go back to non-packing state */
3998                 tmp = qeth_switch_to_nonpacking_if_needed(queue);
3999                 /*
4000                  * check if we need to flush a packing buffer to get a pci
4001                  * flag out on the queue
4002                  */
4003                 if (!tmp && !atomic_read(&queue->set_pci_flags_count))
4004                         tmp = qeth_prep_flush_pack_buffer(queue);
4005                 if (tmp) {
4006                         qeth_flush_buffers(queue, start_index, tmp);
4007                         flush_count += tmp;
4008                 }
4009         }
4010 out:
4011         /* at this point the queue is UNLOCKED again */
4012         if (do_pack)
4013                 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_count);
4014
4015         return rc;
4016 }
4017 EXPORT_SYMBOL_GPL(qeth_do_send_packet);
4018
4019 static void qeth_fill_tso_ext(struct qeth_hdr_tso *hdr,
4020                               unsigned int payload_len, struct sk_buff *skb,
4021                               unsigned int proto_len)
4022 {
4023         struct qeth_hdr_ext_tso *ext = &hdr->ext;
4024
4025         ext->hdr_tot_len = sizeof(*ext);
4026         ext->imb_hdr_no = 1;
4027         ext->hdr_type = 1;
4028         ext->hdr_version = 1;
4029         ext->hdr_len = 28;
4030         ext->payload_len = payload_len;
4031         ext->mss = skb_shinfo(skb)->gso_size;
4032         ext->dg_hdr_len = proto_len;
4033 }
4034
4035 int qeth_xmit(struct qeth_card *card, struct sk_buff *skb,
4036               struct qeth_qdio_out_q *queue, int ipv, int cast_type,
4037               void (*fill_header)(struct qeth_qdio_out_q *queue,
4038                                   struct qeth_hdr *hdr, struct sk_buff *skb,
4039                                   int ipv, int cast_type,
4040                                   unsigned int data_len))
4041 {
4042         unsigned int proto_len, hw_hdr_len;
4043         unsigned int frame_len = skb->len;
4044         bool is_tso = skb_is_gso(skb);
4045         unsigned int data_offset = 0;
4046         struct qeth_hdr *hdr = NULL;
4047         unsigned int hd_len = 0;
4048         unsigned int elements;
4049         int push_len, rc;
4050         bool is_sg;
4051
4052         if (is_tso) {
4053                 hw_hdr_len = sizeof(struct qeth_hdr_tso);
4054                 proto_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
4055         } else {
4056                 hw_hdr_len = sizeof(struct qeth_hdr);
4057                 proto_len = (IS_IQD(card) && IS_LAYER2(card)) ? ETH_HLEN : 0;
4058         }
4059
4060         rc = skb_cow_head(skb, hw_hdr_len);
4061         if (rc)
4062                 return rc;
4063
4064         push_len = qeth_add_hw_header(queue, skb, &hdr, hw_hdr_len, proto_len,
4065                                       &elements);
4066         if (push_len < 0)
4067                 return push_len;
4068         if (is_tso || !push_len) {
4069                 /* HW header needs its own buffer element. */
4070                 hd_len = hw_hdr_len + proto_len;
4071                 data_offset = push_len + proto_len;
4072         }
4073         memset(hdr, 0, hw_hdr_len);
4074         fill_header(queue, hdr, skb, ipv, cast_type, frame_len);
4075         if (is_tso)
4076                 qeth_fill_tso_ext((struct qeth_hdr_tso *) hdr,
4077                                   frame_len - proto_len, skb, proto_len);
4078
4079         is_sg = skb_is_nonlinear(skb);
4080         if (IS_IQD(card)) {
4081                 rc = qeth_do_send_packet_fast(queue, skb, hdr, data_offset,
4082                                               hd_len);
4083         } else {
4084                 /* TODO: drop skb_orphan() once TX completion is fast enough */
4085                 skb_orphan(skb);
4086                 rc = qeth_do_send_packet(card, queue, skb, hdr, data_offset,
4087                                          hd_len, elements);
4088         }
4089
4090         if (!rc) {
4091                 QETH_TXQ_STAT_ADD(queue, buf_elements, elements);
4092                 if (is_sg)
4093                         QETH_TXQ_STAT_INC(queue, skbs_sg);
4094                 if (is_tso) {
4095                         QETH_TXQ_STAT_INC(queue, skbs_tso);
4096                         QETH_TXQ_STAT_ADD(queue, tso_bytes, frame_len);
4097                 }
4098         } else {
4099                 if (!push_len)
4100                         kmem_cache_free(qeth_core_header_cache, hdr);
4101                 if (rc == -EBUSY)
4102                         /* roll back to ETH header */
4103                         skb_pull(skb, push_len);
4104         }
4105         return rc;
4106 }
4107 EXPORT_SYMBOL_GPL(qeth_xmit);
4108
4109 static int qeth_setadp_promisc_mode_cb(struct qeth_card *card,
4110                 struct qeth_reply *reply, unsigned long data)
4111 {
4112         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4113         struct qeth_ipacmd_setadpparms *setparms;
4114
4115         QETH_CARD_TEXT(card, 4, "prmadpcb");
4116
4117         setparms = &(cmd->data.setadapterparms);
4118         if (qeth_setadpparms_inspect_rc(cmd)) {
4119                 QETH_CARD_TEXT_(card, 4, "prmrc%x", cmd->hdr.return_code);
4120                 setparms->data.mode = SET_PROMISC_MODE_OFF;
4121         }
4122         card->info.promisc_mode = setparms->data.mode;
4123         return (cmd->hdr.return_code) ? -EIO : 0;
4124 }
4125
4126 void qeth_setadp_promisc_mode(struct qeth_card *card)
4127 {
4128         enum qeth_ipa_promisc_modes mode;
4129         struct net_device *dev = card->dev;
4130         struct qeth_cmd_buffer *iob;
4131         struct qeth_ipa_cmd *cmd;
4132
4133         QETH_CARD_TEXT(card, 4, "setprom");
4134
4135         if (((dev->flags & IFF_PROMISC) &&
4136              (card->info.promisc_mode == SET_PROMISC_MODE_ON)) ||
4137             (!(dev->flags & IFF_PROMISC) &&
4138              (card->info.promisc_mode == SET_PROMISC_MODE_OFF)))
4139                 return;
4140         mode = SET_PROMISC_MODE_OFF;
4141         if (dev->flags & IFF_PROMISC)
4142                 mode = SET_PROMISC_MODE_ON;
4143         QETH_CARD_TEXT_(card, 4, "mode:%x", mode);
4144
4145         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE,
4146                         sizeof(struct qeth_ipacmd_setadpparms_hdr) + 8);
4147         if (!iob)
4148                 return;
4149         cmd = __ipa_cmd(iob);
4150         cmd->data.setadapterparms.data.mode = mode;
4151         qeth_send_ipa_cmd(card, iob, qeth_setadp_promisc_mode_cb, NULL);
4152 }
4153 EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode);
4154
4155 static int qeth_setadpparms_change_macaddr_cb(struct qeth_card *card,
4156                 struct qeth_reply *reply, unsigned long data)
4157 {
4158         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4159         struct qeth_ipacmd_setadpparms *adp_cmd;
4160
4161         QETH_CARD_TEXT(card, 4, "chgmaccb");
4162         if (qeth_setadpparms_inspect_rc(cmd))
4163                 return -EIO;
4164
4165         adp_cmd = &cmd->data.setadapterparms;
4166         if (!is_valid_ether_addr(adp_cmd->data.change_addr.addr))
4167                 return -EADDRNOTAVAIL;
4168
4169         if (IS_LAYER2(card) && IS_OSD(card) && !IS_VM_NIC(card) &&
4170             !(adp_cmd->hdr.flags & QETH_SETADP_FLAGS_VIRTUAL_MAC))
4171                 return -EADDRNOTAVAIL;
4172
4173         ether_addr_copy(card->dev->dev_addr, adp_cmd->data.change_addr.addr);
4174         return 0;
4175 }
4176
4177 int qeth_setadpparms_change_macaddr(struct qeth_card *card)
4178 {
4179         int rc;
4180         struct qeth_cmd_buffer *iob;
4181         struct qeth_ipa_cmd *cmd;
4182
4183         QETH_CARD_TEXT(card, 4, "chgmac");
4184
4185         iob = qeth_get_adapter_cmd(card, IPA_SETADP_ALTER_MAC_ADDRESS,
4186                                    sizeof(struct qeth_ipacmd_setadpparms_hdr) +
4187                                    sizeof(struct qeth_change_addr));
4188         if (!iob)
4189                 return -ENOMEM;
4190         cmd = __ipa_cmd(iob);
4191         cmd->data.setadapterparms.data.change_addr.cmd = CHANGE_ADDR_READ_MAC;
4192         cmd->data.setadapterparms.data.change_addr.addr_size = ETH_ALEN;
4193         ether_addr_copy(cmd->data.setadapterparms.data.change_addr.addr,
4194                         card->dev->dev_addr);
4195         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_change_macaddr_cb,
4196                                NULL);
4197         return rc;
4198 }
4199 EXPORT_SYMBOL_GPL(qeth_setadpparms_change_macaddr);
4200
4201 static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card,
4202                 struct qeth_reply *reply, unsigned long data)
4203 {
4204         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4205         struct qeth_set_access_ctrl *access_ctrl_req;
4206         int fallback = *(int *)reply->param;
4207
4208         QETH_CARD_TEXT(card, 4, "setaccb");
4209         if (cmd->hdr.return_code)
4210                 return -EIO;
4211         qeth_setadpparms_inspect_rc(cmd);
4212
4213         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4214         QETH_DBF_TEXT_(SETUP, 2, "setaccb");
4215         QETH_DBF_TEXT_(SETUP, 2, "%s", card->gdev->dev.kobj.name);
4216         QETH_DBF_TEXT_(SETUP, 2, "rc=%d",
4217                 cmd->data.setadapterparms.hdr.return_code);
4218         if (cmd->data.setadapterparms.hdr.return_code !=
4219                                                 SET_ACCESS_CTRL_RC_SUCCESS)
4220                 QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%#x) on device %x: %#x\n",
4221                                  access_ctrl_req->subcmd_code, CARD_DEVID(card),
4222                                  cmd->data.setadapterparms.hdr.return_code);
4223         switch (cmd->data.setadapterparms.hdr.return_code) {
4224         case SET_ACCESS_CTRL_RC_SUCCESS:
4225                 if (card->options.isolation == ISOLATION_MODE_NONE) {
4226                         dev_info(&card->gdev->dev,
4227                             "QDIO data connection isolation is deactivated\n");
4228                 } else {
4229                         dev_info(&card->gdev->dev,
4230                             "QDIO data connection isolation is activated\n");
4231                 }
4232                 break;
4233         case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
4234                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already deactivated\n",
4235                                  CARD_DEVID(card));
4236                 if (fallback)
4237                         card->options.isolation = card->options.prev_isolation;
4238                 break;
4239         case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
4240                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already activated\n",
4241                                  CARD_DEVID(card));
4242                 if (fallback)
4243                         card->options.isolation = card->options.prev_isolation;
4244                 break;
4245         case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
4246                 dev_err(&card->gdev->dev, "Adapter does not "
4247                         "support QDIO data connection isolation\n");
4248                 break;
4249         case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
4250                 dev_err(&card->gdev->dev,
4251                         "Adapter is dedicated. "
4252                         "QDIO data connection isolation not supported\n");
4253                 if (fallback)
4254                         card->options.isolation = card->options.prev_isolation;
4255                 break;
4256         case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
4257                 dev_err(&card->gdev->dev,
4258                         "TSO does not permit QDIO data connection isolation\n");
4259                 if (fallback)
4260                         card->options.isolation = card->options.prev_isolation;
4261                 break;
4262         case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED:
4263                 dev_err(&card->gdev->dev, "The adjacent switch port does not "
4264                         "support reflective relay mode\n");
4265                 if (fallback)
4266                         card->options.isolation = card->options.prev_isolation;
4267                 break;
4268         case SET_ACCESS_CTRL_RC_REFLREL_FAILED:
4269                 dev_err(&card->gdev->dev, "The reflective relay mode cannot be "
4270                                         "enabled at the adjacent switch port");
4271                 if (fallback)
4272                         card->options.isolation = card->options.prev_isolation;
4273                 break;
4274         case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED:
4275                 dev_warn(&card->gdev->dev, "Turning off reflective relay mode "
4276                                         "at the adjacent switch failed\n");
4277                 break;
4278         default:
4279                 /* this should never happen */
4280                 if (fallback)
4281                         card->options.isolation = card->options.prev_isolation;
4282                 break;
4283         }
4284         return (cmd->hdr.return_code) ? -EIO : 0;
4285 }
4286
4287 static int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
4288                 enum qeth_ipa_isolation_modes isolation, int fallback)
4289 {
4290         int rc;
4291         struct qeth_cmd_buffer *iob;
4292         struct qeth_ipa_cmd *cmd;
4293         struct qeth_set_access_ctrl *access_ctrl_req;
4294
4295         QETH_CARD_TEXT(card, 4, "setacctl");
4296
4297         QETH_DBF_TEXT_(SETUP, 2, "setacctl");
4298         QETH_DBF_TEXT_(SETUP, 2, "%s", card->gdev->dev.kobj.name);
4299
4300         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL,
4301                                    sizeof(struct qeth_ipacmd_setadpparms_hdr) +
4302                                    sizeof(struct qeth_set_access_ctrl));
4303         if (!iob)
4304                 return -ENOMEM;
4305         cmd = __ipa_cmd(iob);
4306         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4307         access_ctrl_req->subcmd_code = isolation;
4308
4309         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb,
4310                                &fallback);
4311         QETH_DBF_TEXT_(SETUP, 2, "rc=%d", rc);
4312         return rc;
4313 }
4314
4315 int qeth_set_access_ctrl_online(struct qeth_card *card, int fallback)
4316 {
4317         int rc = 0;
4318
4319         QETH_CARD_TEXT(card, 4, "setactlo");
4320
4321         if ((card->info.type == QETH_CARD_TYPE_OSD ||
4322              card->info.type == QETH_CARD_TYPE_OSX) &&
4323              qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) {
4324                 rc = qeth_setadpparms_set_access_ctrl(card,
4325                         card->options.isolation, fallback);
4326                 if (rc) {
4327                         QETH_DBF_MESSAGE(3, "IPA(SET_ACCESS_CTRL(%d) on device %x: sent failed\n",
4328                                          rc, CARD_DEVID(card));
4329                         rc = -EOPNOTSUPP;
4330                 }
4331         } else if (card->options.isolation != ISOLATION_MODE_NONE) {
4332                 card->options.isolation = ISOLATION_MODE_NONE;
4333
4334                 dev_err(&card->gdev->dev, "Adapter does not "
4335                         "support QDIO data connection isolation\n");
4336                 rc = -EOPNOTSUPP;
4337         }
4338         return rc;
4339 }
4340 EXPORT_SYMBOL_GPL(qeth_set_access_ctrl_online);
4341
4342 void qeth_tx_timeout(struct net_device *dev)
4343 {
4344         struct qeth_card *card;
4345
4346         card = dev->ml_priv;
4347         QETH_CARD_TEXT(card, 4, "txtimeo");
4348         QETH_CARD_STAT_INC(card, tx_errors);
4349         qeth_schedule_recovery(card);
4350 }
4351 EXPORT_SYMBOL_GPL(qeth_tx_timeout);
4352
4353 static int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum)
4354 {
4355         struct qeth_card *card = dev->ml_priv;
4356         int rc = 0;
4357
4358         switch (regnum) {
4359         case MII_BMCR: /* Basic mode control register */
4360                 rc = BMCR_FULLDPLX;
4361                 if ((card->info.link_type != QETH_LINK_TYPE_GBIT_ETH) &&
4362                     (card->info.link_type != QETH_LINK_TYPE_OSN) &&
4363                     (card->info.link_type != QETH_LINK_TYPE_10GBIT_ETH) &&
4364                     (card->info.link_type != QETH_LINK_TYPE_25GBIT_ETH))
4365                         rc |= BMCR_SPEED100;
4366                 break;
4367         case MII_BMSR: /* Basic mode status register */
4368                 rc = BMSR_ERCAP | BMSR_ANEGCOMPLETE | BMSR_LSTATUS |
4369                      BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | BMSR_100FULL |
4370                      BMSR_100BASE4;
4371                 break;
4372         case MII_PHYSID1: /* PHYS ID 1 */
4373                 rc = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 8) |
4374                      dev->dev_addr[2];
4375                 rc = (rc >> 5) & 0xFFFF;
4376                 break;
4377         case MII_PHYSID2: /* PHYS ID 2 */
4378                 rc = (dev->dev_addr[2] << 10) & 0xFFFF;
4379                 break;
4380         case MII_ADVERTISE: /* Advertisement control reg */
4381                 rc = ADVERTISE_ALL;
4382                 break;
4383         case MII_LPA: /* Link partner ability reg */
4384                 rc = LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL |
4385                      LPA_100BASE4 | LPA_LPACK;
4386                 break;
4387         case MII_EXPANSION: /* Expansion register */
4388                 break;
4389         case MII_DCOUNTER: /* disconnect counter */
4390                 break;
4391         case MII_FCSCOUNTER: /* false carrier counter */
4392                 break;
4393         case MII_NWAYTEST: /* N-way auto-neg test register */
4394                 break;
4395         case MII_RERRCOUNTER: /* rx error counter */
4396                 rc = card->stats.rx_errors;
4397                 break;
4398         case MII_SREVISION: /* silicon revision */
4399                 break;
4400         case MII_RESV1: /* reserved 1 */
4401                 break;
4402         case MII_LBRERROR: /* loopback, rx, bypass error */
4403                 break;
4404         case MII_PHYADDR: /* physical address */
4405                 break;
4406         case MII_RESV2: /* reserved 2 */
4407                 break;
4408         case MII_TPISTATUS: /* TPI status for 10mbps */
4409                 break;
4410         case MII_NCONFIG: /* network interface config */
4411                 break;
4412         default:
4413                 break;
4414         }
4415         return rc;
4416 }
4417
4418 static int qeth_snmp_command_cb(struct qeth_card *card,
4419                 struct qeth_reply *reply, unsigned long sdata)
4420 {
4421         struct qeth_ipa_cmd *cmd;
4422         struct qeth_arp_query_info *qinfo;
4423         unsigned char *data;
4424         void *snmp_data;
4425         __u16 data_len;
4426
4427         QETH_CARD_TEXT(card, 3, "snpcmdcb");
4428
4429         cmd = (struct qeth_ipa_cmd *) sdata;
4430         data = (unsigned char *)((char *)cmd - reply->offset);
4431         qinfo = (struct qeth_arp_query_info *) reply->param;
4432
4433         if (cmd->hdr.return_code) {
4434                 QETH_CARD_TEXT_(card, 4, "scer1%x", cmd->hdr.return_code);
4435                 return -EIO;
4436         }
4437         if (cmd->data.setadapterparms.hdr.return_code) {
4438                 cmd->hdr.return_code =
4439                         cmd->data.setadapterparms.hdr.return_code;
4440                 QETH_CARD_TEXT_(card, 4, "scer2%x", cmd->hdr.return_code);
4441                 return -EIO;
4442         }
4443         data_len = *((__u16 *)QETH_IPA_PDU_LEN_PDU1(data));
4444         if (cmd->data.setadapterparms.hdr.seq_no == 1) {
4445                 snmp_data = &cmd->data.setadapterparms.data.snmp;
4446                 data_len -= offsetof(struct qeth_ipa_cmd,
4447                                      data.setadapterparms.data.snmp);
4448         } else {
4449                 snmp_data = &cmd->data.setadapterparms.data.snmp.request;
4450                 data_len -= offsetof(struct qeth_ipa_cmd,
4451                                      data.setadapterparms.data.snmp.request);
4452         }
4453
4454         /* check if there is enough room in userspace */
4455         if ((qinfo->udata_len - qinfo->udata_offset) < data_len) {
4456                 QETH_CARD_TEXT_(card, 4, "scer3%i", -ENOSPC);
4457                 return -ENOSPC;
4458         }
4459         QETH_CARD_TEXT_(card, 4, "snore%i",
4460                        cmd->data.setadapterparms.hdr.used_total);
4461         QETH_CARD_TEXT_(card, 4, "sseqn%i",
4462                 cmd->data.setadapterparms.hdr.seq_no);
4463         /*copy entries to user buffer*/
4464         memcpy(qinfo->udata + qinfo->udata_offset, snmp_data, data_len);
4465         qinfo->udata_offset += data_len;
4466
4467         /* check if all replies received ... */
4468                 QETH_CARD_TEXT_(card, 4, "srtot%i",
4469                                cmd->data.setadapterparms.hdr.used_total);
4470                 QETH_CARD_TEXT_(card, 4, "srseq%i",
4471                                cmd->data.setadapterparms.hdr.seq_no);
4472         if (cmd->data.setadapterparms.hdr.seq_no <
4473             cmd->data.setadapterparms.hdr.used_total)
4474                 return 1;
4475         return 0;
4476 }
4477
4478 static int qeth_snmp_command(struct qeth_card *card, char __user *udata)
4479 {
4480         struct qeth_cmd_buffer *iob;
4481         struct qeth_ipa_cmd *cmd;
4482         struct qeth_snmp_ureq *ureq;
4483         unsigned int req_len;
4484         struct qeth_arp_query_info qinfo = {0, };
4485         int rc = 0;
4486
4487         QETH_CARD_TEXT(card, 3, "snmpcmd");
4488
4489         if (card->info.guestlan)
4490                 return -EOPNOTSUPP;
4491
4492         if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) &&
4493             IS_LAYER3(card))
4494                 return -EOPNOTSUPP;
4495
4496         /* skip 4 bytes (data_len struct member) to get req_len */
4497         if (copy_from_user(&req_len, udata + sizeof(int), sizeof(int)))
4498                 return -EFAULT;
4499         if (req_len > (QETH_BUFSIZE - IPA_PDU_HEADER_SIZE -
4500                        sizeof(struct qeth_ipacmd_hdr) -
4501                        sizeof(struct qeth_ipacmd_setadpparms_hdr)))
4502                 return -EINVAL;
4503         ureq = memdup_user(udata, req_len + sizeof(struct qeth_snmp_ureq_hdr));
4504         if (IS_ERR(ureq)) {
4505                 QETH_CARD_TEXT(card, 2, "snmpnome");
4506                 return PTR_ERR(ureq);
4507         }
4508         qinfo.udata_len = ureq->hdr.data_len;
4509         qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
4510         if (!qinfo.udata) {
4511                 kfree(ureq);
4512                 return -ENOMEM;
4513         }
4514         qinfo.udata_offset = sizeof(struct qeth_snmp_ureq_hdr);
4515
4516         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL,
4517                                    QETH_SNMP_SETADP_CMDLENGTH + req_len);
4518         if (!iob) {
4519                 rc = -ENOMEM;
4520                 goto out;
4521         }
4522
4523         /* for large requests, fix-up the length fields: */
4524         qeth_prepare_ipa_cmd(card, iob, QETH_SETADP_BASE_LEN + req_len);
4525
4526         cmd = __ipa_cmd(iob);
4527         memcpy(&cmd->data.setadapterparms.data.snmp, &ureq->cmd, req_len);
4528         rc = qeth_send_ipa_cmd(card, iob, qeth_snmp_command_cb, &qinfo);
4529         if (rc)
4530                 QETH_DBF_MESSAGE(2, "SNMP command failed on device %x: (%#x)\n",
4531                                  CARD_DEVID(card), rc);
4532         else {
4533                 if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
4534                         rc = -EFAULT;
4535         }
4536 out:
4537         kfree(ureq);
4538         kfree(qinfo.udata);
4539         return rc;
4540 }
4541
4542 static int qeth_setadpparms_query_oat_cb(struct qeth_card *card,
4543                 struct qeth_reply *reply, unsigned long data)
4544 {
4545         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4546         struct qeth_qoat_priv *priv;
4547         char *resdata;
4548         int resdatalen;
4549
4550         QETH_CARD_TEXT(card, 3, "qoatcb");
4551         if (qeth_setadpparms_inspect_rc(cmd))
4552                 return -EIO;
4553
4554         priv = (struct qeth_qoat_priv *)reply->param;
4555         resdatalen = cmd->data.setadapterparms.hdr.cmdlength;
4556         resdata = (char *)data + 28;
4557
4558         if (resdatalen > (priv->buffer_len - priv->response_len))
4559                 return -ENOSPC;
4560
4561         memcpy((priv->buffer + priv->response_len), resdata,
4562                 resdatalen);
4563         priv->response_len += resdatalen;
4564
4565         if (cmd->data.setadapterparms.hdr.seq_no <
4566             cmd->data.setadapterparms.hdr.used_total)
4567                 return 1;
4568         return 0;
4569 }
4570
4571 static int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
4572 {
4573         int rc = 0;
4574         struct qeth_cmd_buffer *iob;
4575         struct qeth_ipa_cmd *cmd;
4576         struct qeth_query_oat *oat_req;
4577         struct qeth_query_oat_data oat_data;
4578         struct qeth_qoat_priv priv;
4579         void __user *tmp;
4580
4581         QETH_CARD_TEXT(card, 3, "qoatcmd");
4582
4583         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT)) {
4584                 rc = -EOPNOTSUPP;
4585                 goto out;
4586         }
4587
4588         if (copy_from_user(&oat_data, udata,
4589             sizeof(struct qeth_query_oat_data))) {
4590                         rc = -EFAULT;
4591                         goto out;
4592         }
4593
4594         priv.buffer_len = oat_data.buffer_len;
4595         priv.response_len = 0;
4596         priv.buffer = vzalloc(oat_data.buffer_len);
4597         if (!priv.buffer) {
4598                 rc = -ENOMEM;
4599                 goto out;
4600         }
4601
4602         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4603                                    sizeof(struct qeth_ipacmd_setadpparms_hdr) +
4604                                    sizeof(struct qeth_query_oat));
4605         if (!iob) {
4606                 rc = -ENOMEM;
4607                 goto out_free;
4608         }
4609         cmd = __ipa_cmd(iob);
4610         oat_req = &cmd->data.setadapterparms.data.query_oat;
4611         oat_req->subcmd_code = oat_data.command;
4612
4613         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb,
4614                                &priv);
4615         if (!rc) {
4616                 if (is_compat_task())
4617                         tmp = compat_ptr(oat_data.ptr);
4618                 else
4619                         tmp = (void __user *)(unsigned long)oat_data.ptr;
4620
4621                 if (copy_to_user(tmp, priv.buffer,
4622                     priv.response_len)) {
4623                         rc = -EFAULT;
4624                         goto out_free;
4625                 }
4626
4627                 oat_data.response_len = priv.response_len;
4628
4629                 if (copy_to_user(udata, &oat_data,
4630                     sizeof(struct qeth_query_oat_data)))
4631                         rc = -EFAULT;
4632         }
4633
4634 out_free:
4635         vfree(priv.buffer);
4636 out:
4637         return rc;
4638 }
4639
4640 static int qeth_query_card_info_cb(struct qeth_card *card,
4641                                    struct qeth_reply *reply, unsigned long data)
4642 {
4643         struct carrier_info *carrier_info = (struct carrier_info *)reply->param;
4644         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4645         struct qeth_query_card_info *card_info;
4646
4647         QETH_CARD_TEXT(card, 2, "qcrdincb");
4648         if (qeth_setadpparms_inspect_rc(cmd))
4649                 return -EIO;
4650
4651         card_info = &cmd->data.setadapterparms.data.card_info;
4652         carrier_info->card_type = card_info->card_type;
4653         carrier_info->port_mode = card_info->port_mode;
4654         carrier_info->port_speed = card_info->port_speed;
4655         return 0;
4656 }
4657
4658 int qeth_query_card_info(struct qeth_card *card,
4659                          struct carrier_info *carrier_info)
4660 {
4661         struct qeth_cmd_buffer *iob;
4662
4663         QETH_CARD_TEXT(card, 2, "qcrdinfo");
4664         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_CARD_INFO))
4665                 return -EOPNOTSUPP;
4666         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_CARD_INFO,
4667                 sizeof(struct qeth_ipacmd_setadpparms_hdr));
4668         if (!iob)
4669                 return -ENOMEM;
4670         return qeth_send_ipa_cmd(card, iob, qeth_query_card_info_cb,
4671                                         (void *)carrier_info);
4672 }
4673
4674 /**
4675  * qeth_vm_request_mac() - Request a hypervisor-managed MAC address
4676  * @card: pointer to a qeth_card
4677  *
4678  * Returns
4679  *      0, if a MAC address has been set for the card's netdevice
4680  *      a return code, for various error conditions
4681  */
4682 int qeth_vm_request_mac(struct qeth_card *card)
4683 {
4684         struct diag26c_mac_resp *response;
4685         struct diag26c_mac_req *request;
4686         struct ccw_dev_id id;
4687         int rc;
4688
4689         QETH_DBF_TEXT(SETUP, 2, "vmreqmac");
4690
4691         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
4692         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
4693         if (!request || !response) {
4694                 rc = -ENOMEM;
4695                 goto out;
4696         }
4697
4698         ccw_device_get_id(CARD_DDEV(card), &id);
4699         request->resp_buf_len = sizeof(*response);
4700         request->resp_version = DIAG26C_VERSION2;
4701         request->op_code = DIAG26C_GET_MAC;
4702         request->devno = id.devno;
4703
4704         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4705         rc = diag26c(request, response, DIAG26C_MAC_SERVICES);
4706         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4707         if (rc)
4708                 goto out;
4709         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
4710
4711         if (request->resp_buf_len < sizeof(*response) ||
4712             response->version != request->resp_version) {
4713                 rc = -EIO;
4714                 QETH_DBF_TEXT(SETUP, 2, "badresp");
4715                 QETH_DBF_HEX(SETUP, 2, &request->resp_buf_len,
4716                              sizeof(request->resp_buf_len));
4717         } else if (!is_valid_ether_addr(response->mac)) {
4718                 rc = -EINVAL;
4719                 QETH_DBF_TEXT(SETUP, 2, "badmac");
4720                 QETH_DBF_HEX(SETUP, 2, response->mac, ETH_ALEN);
4721         } else {
4722                 ether_addr_copy(card->dev->dev_addr, response->mac);
4723         }
4724
4725 out:
4726         kfree(response);
4727         kfree(request);
4728         return rc;
4729 }
4730 EXPORT_SYMBOL_GPL(qeth_vm_request_mac);
4731
4732 static int qeth_get_qdio_q_format(struct qeth_card *card)
4733 {
4734         if (card->info.type == QETH_CARD_TYPE_IQD)
4735                 return QDIO_IQDIO_QFMT;
4736         else
4737                 return QDIO_QETH_QFMT;
4738 }
4739
4740 static void qeth_determine_capabilities(struct qeth_card *card)
4741 {
4742         int rc;
4743         int length;
4744         char *prcd;
4745         struct ccw_device *ddev;
4746         int ddev_offline = 0;
4747
4748         QETH_DBF_TEXT(SETUP, 2, "detcapab");
4749         ddev = CARD_DDEV(card);
4750         if (!ddev->online) {
4751                 ddev_offline = 1;
4752                 rc = ccw_device_set_online(ddev);
4753                 if (rc) {
4754                         QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
4755                         goto out;
4756                 }
4757         }
4758
4759         rc = qeth_read_conf_data(card, (void **) &prcd, &length);
4760         if (rc) {
4761                 QETH_DBF_MESSAGE(2, "qeth_read_conf_data on device %x returned %i\n",
4762                                  CARD_DEVID(card), rc);
4763                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
4764                 goto out_offline;
4765         }
4766         qeth_configure_unitaddr(card, prcd);
4767         if (ddev_offline)
4768                 qeth_configure_blkt_default(card, prcd);
4769         kfree(prcd);
4770
4771         rc = qdio_get_ssqd_desc(ddev, &card->ssqd);
4772         if (rc)
4773                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
4774
4775         QETH_DBF_TEXT_(SETUP, 2, "qfmt%d", card->ssqd.qfmt);
4776         QETH_DBF_TEXT_(SETUP, 2, "ac1:%02x", card->ssqd.qdioac1);
4777         QETH_DBF_TEXT_(SETUP, 2, "ac2:%04x", card->ssqd.qdioac2);
4778         QETH_DBF_TEXT_(SETUP, 2, "ac3:%04x", card->ssqd.qdioac3);
4779         QETH_DBF_TEXT_(SETUP, 2, "icnt%d", card->ssqd.icnt);
4780         if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) ||
4781             ((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) ||
4782             ((card->ssqd.qdioac3 & CHSC_AC3_FORMAT2_CQ_AVAILABLE) == 0))) {
4783                 dev_info(&card->gdev->dev,
4784                         "Completion Queueing supported\n");
4785         } else {
4786                 card->options.cq = QETH_CQ_NOTAVAILABLE;
4787         }
4788
4789
4790 out_offline:
4791         if (ddev_offline == 1)
4792                 ccw_device_set_offline(ddev);
4793 out:
4794         return;
4795 }
4796
4797 static void qeth_qdio_establish_cq(struct qeth_card *card,
4798                                    struct qdio_buffer **in_sbal_ptrs,
4799                                    void (**queue_start_poll)
4800                                         (struct ccw_device *, int,
4801                                          unsigned long))
4802 {
4803         int i;
4804
4805         if (card->options.cq == QETH_CQ_ENABLED) {
4806                 int offset = QDIO_MAX_BUFFERS_PER_Q *
4807                              (card->qdio.no_in_queues - 1);
4808                 for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i) {
4809                         in_sbal_ptrs[offset + i] = (struct qdio_buffer *)
4810                                 virt_to_phys(card->qdio.c_q->bufs[i].buffer);
4811                 }
4812
4813                 queue_start_poll[card->qdio.no_in_queues - 1] = NULL;
4814         }
4815 }
4816
4817 static int qeth_qdio_establish(struct qeth_card *card)
4818 {
4819         struct qdio_initialize init_data;
4820         char *qib_param_field;
4821         struct qdio_buffer **in_sbal_ptrs;
4822         void (**queue_start_poll) (struct ccw_device *, int, unsigned long);
4823         struct qdio_buffer **out_sbal_ptrs;
4824         int i, j, k;
4825         int rc = 0;
4826
4827         QETH_DBF_TEXT(SETUP, 2, "qdioest");
4828
4829         qib_param_field = kzalloc(QDIO_MAX_BUFFERS_PER_Q,
4830                                   GFP_KERNEL);
4831         if (!qib_param_field) {
4832                 rc =  -ENOMEM;
4833                 goto out_free_nothing;
4834         }
4835
4836         qeth_create_qib_param_field(card, qib_param_field);
4837         qeth_create_qib_param_field_blkt(card, qib_param_field);
4838
4839         in_sbal_ptrs = kcalloc(card->qdio.no_in_queues * QDIO_MAX_BUFFERS_PER_Q,
4840                                sizeof(void *),
4841                                GFP_KERNEL);
4842         if (!in_sbal_ptrs) {
4843                 rc = -ENOMEM;
4844                 goto out_free_qib_param;
4845         }
4846         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i) {
4847                 in_sbal_ptrs[i] = (struct qdio_buffer *)
4848                         virt_to_phys(card->qdio.in_q->bufs[i].buffer);
4849         }
4850
4851         queue_start_poll = kcalloc(card->qdio.no_in_queues, sizeof(void *),
4852                                    GFP_KERNEL);
4853         if (!queue_start_poll) {
4854                 rc = -ENOMEM;
4855                 goto out_free_in_sbals;
4856         }
4857         for (i = 0; i < card->qdio.no_in_queues; ++i)
4858                 queue_start_poll[i] = qeth_qdio_start_poll;
4859
4860         qeth_qdio_establish_cq(card, in_sbal_ptrs, queue_start_poll);
4861
4862         out_sbal_ptrs =
4863                 kcalloc(card->qdio.no_out_queues * QDIO_MAX_BUFFERS_PER_Q,
4864                         sizeof(void *),
4865                         GFP_KERNEL);
4866         if (!out_sbal_ptrs) {
4867                 rc = -ENOMEM;
4868                 goto out_free_queue_start_poll;
4869         }
4870         for (i = 0, k = 0; i < card->qdio.no_out_queues; ++i)
4871                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j, ++k) {
4872                         out_sbal_ptrs[k] = (struct qdio_buffer *)virt_to_phys(
4873                                 card->qdio.out_qs[i]->bufs[j]->buffer);
4874                 }
4875
4876         memset(&init_data, 0, sizeof(struct qdio_initialize));
4877         init_data.cdev                   = CARD_DDEV(card);
4878         init_data.q_format               = qeth_get_qdio_q_format(card);
4879         init_data.qib_param_field_format = 0;
4880         init_data.qib_param_field        = qib_param_field;
4881         init_data.no_input_qs            = card->qdio.no_in_queues;
4882         init_data.no_output_qs           = card->qdio.no_out_queues;
4883         init_data.input_handler          = qeth_qdio_input_handler;
4884         init_data.output_handler         = qeth_qdio_output_handler;
4885         init_data.queue_start_poll_array = queue_start_poll;
4886         init_data.int_parm               = (unsigned long) card;
4887         init_data.input_sbal_addr_array  = in_sbal_ptrs;
4888         init_data.output_sbal_addr_array = out_sbal_ptrs;
4889         init_data.output_sbal_state_array = card->qdio.out_bufstates;
4890         init_data.scan_threshold =
4891                 (card->info.type == QETH_CARD_TYPE_IQD) ? 1 : 32;
4892
4893         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED,
4894                 QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) {
4895                 rc = qdio_allocate(&init_data);
4896                 if (rc) {
4897                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
4898                         goto out;
4899                 }
4900                 rc = qdio_establish(&init_data);
4901                 if (rc) {
4902                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
4903                         qdio_free(CARD_DDEV(card));
4904                 }
4905         }
4906
4907         switch (card->options.cq) {
4908         case QETH_CQ_ENABLED:
4909                 dev_info(&card->gdev->dev, "Completion Queue support enabled");
4910                 break;
4911         case QETH_CQ_DISABLED:
4912                 dev_info(&card->gdev->dev, "Completion Queue support disabled");
4913                 break;
4914         default:
4915                 break;
4916         }
4917 out:
4918         kfree(out_sbal_ptrs);
4919 out_free_queue_start_poll:
4920         kfree(queue_start_poll);
4921 out_free_in_sbals:
4922         kfree(in_sbal_ptrs);
4923 out_free_qib_param:
4924         kfree(qib_param_field);
4925 out_free_nothing:
4926         return rc;
4927 }
4928
4929 static void qeth_core_free_card(struct qeth_card *card)
4930 {
4931         QETH_DBF_TEXT(SETUP, 2, "freecrd");
4932         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
4933         qeth_clean_channel(&card->read);
4934         qeth_clean_channel(&card->write);
4935         qeth_clean_channel(&card->data);
4936         destroy_workqueue(card->event_wq);
4937         qeth_free_qdio_buffers(card);
4938         unregister_service_level(&card->qeth_service_level);
4939         dev_set_drvdata(&card->gdev->dev, NULL);
4940         kfree(card);
4941 }
4942
4943 void qeth_trace_features(struct qeth_card *card)
4944 {
4945         QETH_CARD_TEXT(card, 2, "features");
4946         QETH_CARD_HEX(card, 2, &card->options.ipa4, sizeof(card->options.ipa4));
4947         QETH_CARD_HEX(card, 2, &card->options.ipa6, sizeof(card->options.ipa6));
4948         QETH_CARD_HEX(card, 2, &card->options.adp, sizeof(card->options.adp));
4949         QETH_CARD_HEX(card, 2, &card->info.diagass_support,
4950                       sizeof(card->info.diagass_support));
4951 }
4952 EXPORT_SYMBOL_GPL(qeth_trace_features);
4953
4954 static struct ccw_device_id qeth_ids[] = {
4955         {CCW_DEVICE_DEVTYPE(0x1731, 0x01, 0x1732, 0x01),
4956                                         .driver_info = QETH_CARD_TYPE_OSD},
4957         {CCW_DEVICE_DEVTYPE(0x1731, 0x05, 0x1732, 0x05),
4958                                         .driver_info = QETH_CARD_TYPE_IQD},
4959         {CCW_DEVICE_DEVTYPE(0x1731, 0x06, 0x1732, 0x06),
4960                                         .driver_info = QETH_CARD_TYPE_OSN},
4961         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x03),
4962                                         .driver_info = QETH_CARD_TYPE_OSM},
4963         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x02),
4964                                         .driver_info = QETH_CARD_TYPE_OSX},
4965         {},
4966 };
4967 MODULE_DEVICE_TABLE(ccw, qeth_ids);
4968
4969 static struct ccw_driver qeth_ccw_driver = {
4970         .driver = {
4971                 .owner = THIS_MODULE,
4972                 .name = "qeth",
4973         },
4974         .ids = qeth_ids,
4975         .probe = ccwgroup_probe_ccwdev,
4976         .remove = ccwgroup_remove_ccwdev,
4977 };
4978
4979 int qeth_core_hardsetup_card(struct qeth_card *card, bool *carrier_ok)
4980 {
4981         int retries = 3;
4982         int rc;
4983
4984         QETH_DBF_TEXT(SETUP, 2, "hrdsetup");
4985         atomic_set(&card->force_alloc_skb, 0);
4986         qeth_update_from_chp_desc(card);
4987 retry:
4988         if (retries < 3)
4989                 QETH_DBF_MESSAGE(2, "Retrying to do IDX activates on device %x.\n",
4990                                  CARD_DEVID(card));
4991         rc = qeth_qdio_clear_card(card, card->info.type != QETH_CARD_TYPE_IQD);
4992         ccw_device_set_offline(CARD_DDEV(card));
4993         ccw_device_set_offline(CARD_WDEV(card));
4994         ccw_device_set_offline(CARD_RDEV(card));
4995         qdio_free(CARD_DDEV(card));
4996         rc = ccw_device_set_online(CARD_RDEV(card));
4997         if (rc)
4998                 goto retriable;
4999         rc = ccw_device_set_online(CARD_WDEV(card));
5000         if (rc)
5001                 goto retriable;
5002         rc = ccw_device_set_online(CARD_DDEV(card));
5003         if (rc)
5004                 goto retriable;
5005 retriable:
5006         if (rc == -ERESTARTSYS) {
5007                 QETH_DBF_TEXT(SETUP, 2, "break1");
5008                 return rc;
5009         } else if (rc) {
5010                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
5011                 if (--retries < 0)
5012                         goto out;
5013                 else
5014                         goto retry;
5015         }
5016         qeth_determine_capabilities(card);
5017         qeth_init_tokens(card);
5018         qeth_init_func_level(card);
5019         rc = qeth_idx_activate_channel(card, &card->read, qeth_idx_read_cb);
5020         if (rc == -ERESTARTSYS) {
5021                 QETH_DBF_TEXT(SETUP, 2, "break2");
5022                 return rc;
5023         } else if (rc) {
5024                 QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
5025                 if (--retries < 0)
5026                         goto out;
5027                 else
5028                         goto retry;
5029         }
5030         rc = qeth_idx_activate_channel(card, &card->write, qeth_idx_write_cb);
5031         if (rc == -ERESTARTSYS) {
5032                 QETH_DBF_TEXT(SETUP, 2, "break3");
5033                 return rc;
5034         } else if (rc) {
5035                 QETH_DBF_TEXT_(SETUP, 2, "4err%d", rc);
5036                 if (--retries < 0)
5037                         goto out;
5038                 else
5039                         goto retry;
5040         }
5041         card->read_or_write_problem = 0;
5042         rc = qeth_mpc_initialize(card);
5043         if (rc) {
5044                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
5045                 goto out;
5046         }
5047
5048         rc = qeth_send_startlan(card);
5049         if (rc) {
5050                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
5051                 if (rc == -ENETDOWN) {
5052                         dev_warn(&card->gdev->dev, "The LAN is offline\n");
5053                         *carrier_ok = false;
5054                 } else {
5055                         goto out;
5056                 }
5057         } else {
5058                 *carrier_ok = true;
5059         }
5060
5061         card->options.ipa4.supported_funcs = 0;
5062         card->options.ipa6.supported_funcs = 0;
5063         card->options.adp.supported_funcs = 0;
5064         card->options.sbp.supported_funcs = 0;
5065         card->info.diagass_support = 0;
5066         rc = qeth_query_ipassists(card, QETH_PROT_IPV4);
5067         if (rc == -ENOMEM)
5068                 goto out;
5069         if (qeth_is_supported(card, IPA_IPV6)) {
5070                 rc = qeth_query_ipassists(card, QETH_PROT_IPV6);
5071                 if (rc == -ENOMEM)
5072                         goto out;
5073         }
5074         if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
5075                 rc = qeth_query_setadapterparms(card);
5076                 if (rc < 0) {
5077                         QETH_DBF_TEXT_(SETUP, 2, "7err%d", rc);
5078                         goto out;
5079                 }
5080         }
5081         if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
5082                 rc = qeth_query_setdiagass(card);
5083                 if (rc < 0) {
5084                         QETH_DBF_TEXT_(SETUP, 2, "8err%d", rc);
5085                         goto out;
5086                 }
5087         }
5088         return 0;
5089 out:
5090         dev_warn(&card->gdev->dev, "The qeth device driver failed to recover "
5091                 "an error on the device\n");
5092         QETH_DBF_MESSAGE(2, "Initialization for device %x failed in hardsetup! rc=%d\n",
5093                          CARD_DEVID(card), rc);
5094         return rc;
5095 }
5096 EXPORT_SYMBOL_GPL(qeth_core_hardsetup_card);
5097
5098 static void qeth_create_skb_frag(struct qdio_buffer_element *element,
5099                                  struct sk_buff *skb, int offset, int data_len)
5100 {
5101         struct page *page = virt_to_page(element->addr);
5102         unsigned int next_frag;
5103
5104         /* first fill the linear space */
5105         if (!skb->len) {
5106                 unsigned int linear = min(data_len, skb_tailroom(skb));
5107
5108                 skb_put_data(skb, element->addr + offset, linear);
5109                 data_len -= linear;
5110                 if (!data_len)
5111                         return;
5112                 offset += linear;
5113                 /* fall through to add page frag for remaining data */
5114         }
5115
5116         next_frag = skb_shinfo(skb)->nr_frags;
5117         get_page(page);
5118         skb_add_rx_frag(skb, next_frag, page, offset, data_len, data_len);
5119 }
5120
5121 static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale)
5122 {
5123         return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY);
5124 }
5125
5126 struct sk_buff *qeth_core_get_next_skb(struct qeth_card *card,
5127                 struct qeth_qdio_buffer *qethbuffer,
5128                 struct qdio_buffer_element **__element, int *__offset,
5129                 struct qeth_hdr **hdr)
5130 {
5131         struct qdio_buffer_element *element = *__element;
5132         struct qdio_buffer *buffer = qethbuffer->buffer;
5133         int offset = *__offset;
5134         struct sk_buff *skb;
5135         int skb_len = 0;
5136         void *data_ptr;
5137         int data_len;
5138         int headroom = 0;
5139         int use_rx_sg = 0;
5140
5141         /* qeth_hdr must not cross element boundaries */
5142         while (element->length < offset + sizeof(struct qeth_hdr)) {
5143                 if (qeth_is_last_sbale(element))
5144                         return NULL;
5145                 element++;
5146                 offset = 0;
5147         }
5148         *hdr = element->addr + offset;
5149
5150         offset += sizeof(struct qeth_hdr);
5151         switch ((*hdr)->hdr.l2.id) {
5152         case QETH_HEADER_TYPE_LAYER2:
5153                 skb_len = (*hdr)->hdr.l2.pkt_length;
5154                 break;
5155         case QETH_HEADER_TYPE_LAYER3:
5156                 skb_len = (*hdr)->hdr.l3.length;
5157                 headroom = ETH_HLEN;
5158                 break;
5159         case QETH_HEADER_TYPE_OSN:
5160                 skb_len = (*hdr)->hdr.osn.pdu_length;
5161                 headroom = sizeof(struct qeth_hdr);
5162                 break;
5163         default:
5164                 break;
5165         }
5166
5167         if (!skb_len)
5168                 return NULL;
5169
5170         if (((skb_len >= card->options.rx_sg_cb) &&
5171              (!(card->info.type == QETH_CARD_TYPE_OSN)) &&
5172              (!atomic_read(&card->force_alloc_skb))) ||
5173             (card->options.cq == QETH_CQ_ENABLED))
5174                 use_rx_sg = 1;
5175
5176         if (use_rx_sg && qethbuffer->rx_skb) {
5177                 /* QETH_CQ_ENABLED only: */
5178                 skb = qethbuffer->rx_skb;
5179                 qethbuffer->rx_skb = NULL;
5180         } else {
5181                 unsigned int linear = (use_rx_sg) ? QETH_RX_PULL_LEN : skb_len;
5182
5183                 skb = napi_alloc_skb(&card->napi, linear + headroom);
5184         }
5185         if (!skb)
5186                 goto no_mem;
5187         if (headroom)
5188                 skb_reserve(skb, headroom);
5189
5190         data_ptr = element->addr + offset;
5191         while (skb_len) {
5192                 data_len = min(skb_len, (int)(element->length - offset));
5193                 if (data_len) {
5194                         if (use_rx_sg)
5195                                 qeth_create_skb_frag(element, skb, offset,
5196                                                      data_len);
5197                         else
5198                                 skb_put_data(skb, data_ptr, data_len);
5199                 }
5200                 skb_len -= data_len;
5201                 if (skb_len) {
5202                         if (qeth_is_last_sbale(element)) {
5203                                 QETH_CARD_TEXT(card, 4, "unexeob");
5204                                 QETH_CARD_HEX(card, 2, buffer, sizeof(void *));
5205                                 dev_kfree_skb_any(skb);
5206                                 QETH_CARD_STAT_INC(card, rx_errors);
5207                                 return NULL;
5208                         }
5209                         element++;
5210                         offset = 0;
5211                         data_ptr = element->addr;
5212                 } else {
5213                         offset += data_len;
5214                 }
5215         }
5216         *__element = element;
5217         *__offset = offset;
5218         if (use_rx_sg) {
5219                 QETH_CARD_STAT_INC(card, rx_sg_skbs);
5220                 QETH_CARD_STAT_ADD(card, rx_sg_frags,
5221                                    skb_shinfo(skb)->nr_frags);
5222         }
5223         return skb;
5224 no_mem:
5225         if (net_ratelimit()) {
5226                 QETH_CARD_TEXT(card, 2, "noskbmem");
5227         }
5228         QETH_CARD_STAT_INC(card, rx_dropped);
5229         return NULL;
5230 }
5231 EXPORT_SYMBOL_GPL(qeth_core_get_next_skb);
5232
5233 int qeth_poll(struct napi_struct *napi, int budget)
5234 {
5235         struct qeth_card *card = container_of(napi, struct qeth_card, napi);
5236         int work_done = 0;
5237         struct qeth_qdio_buffer *buffer;
5238         int done;
5239         int new_budget = budget;
5240
5241         while (1) {
5242                 if (!card->rx.b_count) {
5243                         card->rx.qdio_err = 0;
5244                         card->rx.b_count = qdio_get_next_buffers(
5245                                 card->data.ccwdev, 0, &card->rx.b_index,
5246                                 &card->rx.qdio_err);
5247                         if (card->rx.b_count <= 0) {
5248                                 card->rx.b_count = 0;
5249                                 break;
5250                         }
5251                         card->rx.b_element =
5252                                 &card->qdio.in_q->bufs[card->rx.b_index]
5253                                 .buffer->element[0];
5254                         card->rx.e_offset = 0;
5255                 }
5256
5257                 while (card->rx.b_count) {
5258                         buffer = &card->qdio.in_q->bufs[card->rx.b_index];
5259                         if (!(card->rx.qdio_err &&
5260                             qeth_check_qdio_errors(card, buffer->buffer,
5261                             card->rx.qdio_err, "qinerr")))
5262                                 work_done +=
5263                                         card->discipline->process_rx_buffer(
5264                                                 card, new_budget, &done);
5265                         else
5266                                 done = 1;
5267
5268                         if (done) {
5269                                 QETH_CARD_STAT_INC(card, rx_bufs);
5270                                 qeth_put_buffer_pool_entry(card,
5271                                         buffer->pool_entry);
5272                                 qeth_queue_input_buffer(card, card->rx.b_index);
5273                                 card->rx.b_count--;
5274                                 if (card->rx.b_count) {
5275                                         card->rx.b_index =
5276                                                 (card->rx.b_index + 1) %
5277                                                 QDIO_MAX_BUFFERS_PER_Q;
5278                                         card->rx.b_element =
5279                                                 &card->qdio.in_q
5280                                                 ->bufs[card->rx.b_index]
5281                                                 .buffer->element[0];
5282                                         card->rx.e_offset = 0;
5283                                 }
5284                         }
5285
5286                         if (work_done >= budget)
5287                                 goto out;
5288                         else
5289                                 new_budget = budget - work_done;
5290                 }
5291         }
5292
5293         napi_complete_done(napi, work_done);
5294         if (qdio_start_irq(card->data.ccwdev, 0))
5295                 napi_schedule(&card->napi);
5296 out:
5297         return work_done;
5298 }
5299 EXPORT_SYMBOL_GPL(qeth_poll);
5300
5301 static int qeth_setassparms_inspect_rc(struct qeth_ipa_cmd *cmd)
5302 {
5303         if (!cmd->hdr.return_code)
5304                 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
5305         return cmd->hdr.return_code;
5306 }
5307
5308 static int qeth_setassparms_get_caps_cb(struct qeth_card *card,
5309                                         struct qeth_reply *reply,
5310                                         unsigned long data)
5311 {
5312         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5313         struct qeth_ipa_caps *caps = reply->param;
5314
5315         if (qeth_setassparms_inspect_rc(cmd))
5316                 return -EIO;
5317
5318         caps->supported = cmd->data.setassparms.data.caps.supported;
5319         caps->enabled = cmd->data.setassparms.data.caps.enabled;
5320         return 0;
5321 }
5322
5323 int qeth_setassparms_cb(struct qeth_card *card,
5324                         struct qeth_reply *reply, unsigned long data)
5325 {
5326         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5327
5328         QETH_CARD_TEXT(card, 4, "defadpcb");
5329
5330         if (cmd->hdr.return_code)
5331                 return -EIO;
5332
5333         cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
5334         if (cmd->hdr.prot_version == QETH_PROT_IPV4)
5335                 card->options.ipa4.enabled_funcs = cmd->hdr.ipa_enabled;
5336         if (cmd->hdr.prot_version == QETH_PROT_IPV6)
5337                 card->options.ipa6.enabled_funcs = cmd->hdr.ipa_enabled;
5338         return 0;
5339 }
5340 EXPORT_SYMBOL_GPL(qeth_setassparms_cb);
5341
5342 struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card,
5343                                                  enum qeth_ipa_funcs ipa_func,
5344                                                  __u16 cmd_code, __u16 len,
5345                                                  enum qeth_prot_versions prot)
5346 {
5347         struct qeth_cmd_buffer *iob;
5348         struct qeth_ipa_cmd *cmd;
5349
5350         QETH_CARD_TEXT(card, 4, "getasscm");
5351         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SETASSPARMS, prot);
5352
5353         if (iob) {
5354                 cmd = __ipa_cmd(iob);
5355                 cmd->data.setassparms.hdr.assist_no = ipa_func;
5356                 cmd->data.setassparms.hdr.length = 8 + len;
5357                 cmd->data.setassparms.hdr.command_code = cmd_code;
5358         }
5359
5360         return iob;
5361 }
5362 EXPORT_SYMBOL_GPL(qeth_get_setassparms_cmd);
5363
5364 int qeth_send_simple_setassparms_prot(struct qeth_card *card,
5365                                       enum qeth_ipa_funcs ipa_func,
5366                                       u16 cmd_code, long data,
5367                                       enum qeth_prot_versions prot)
5368 {
5369         int length = 0;
5370         struct qeth_cmd_buffer *iob;
5371
5372         QETH_CARD_TEXT_(card, 4, "simassp%i", prot);
5373         if (data)
5374                 length = sizeof(__u32);
5375         iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code, length, prot);
5376         if (!iob)
5377                 return -ENOMEM;
5378
5379         __ipa_cmd(iob)->data.setassparms.data.flags_32bit = (__u32) data;
5380         return qeth_send_ipa_cmd(card, iob, qeth_setassparms_cb, NULL);
5381 }
5382 EXPORT_SYMBOL_GPL(qeth_send_simple_setassparms_prot);
5383
5384 static void qeth_unregister_dbf_views(void)
5385 {
5386         int x;
5387         for (x = 0; x < QETH_DBF_INFOS; x++) {
5388                 debug_unregister(qeth_dbf[x].id);
5389                 qeth_dbf[x].id = NULL;
5390         }
5391 }
5392
5393 void qeth_dbf_longtext(debug_info_t *id, int level, char *fmt, ...)
5394 {
5395         char dbf_txt_buf[32];
5396         va_list args;
5397
5398         if (!debug_level_enabled(id, level))
5399                 return;
5400         va_start(args, fmt);
5401         vsnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
5402         va_end(args);
5403         debug_text_event(id, level, dbf_txt_buf);
5404 }
5405 EXPORT_SYMBOL_GPL(qeth_dbf_longtext);
5406
5407 static int qeth_register_dbf_views(void)
5408 {
5409         int ret;
5410         int x;
5411
5412         for (x = 0; x < QETH_DBF_INFOS; x++) {
5413                 /* register the areas */
5414                 qeth_dbf[x].id = debug_register(qeth_dbf[x].name,
5415                                                 qeth_dbf[x].pages,
5416                                                 qeth_dbf[x].areas,
5417                                                 qeth_dbf[x].len);
5418                 if (qeth_dbf[x].id == NULL) {
5419                         qeth_unregister_dbf_views();
5420                         return -ENOMEM;
5421                 }
5422
5423                 /* register a view */
5424                 ret = debug_register_view(qeth_dbf[x].id, qeth_dbf[x].view);
5425                 if (ret) {
5426                         qeth_unregister_dbf_views();
5427                         return ret;
5428                 }
5429
5430                 /* set a passing level */
5431                 debug_set_level(qeth_dbf[x].id, qeth_dbf[x].level);
5432         }
5433
5434         return 0;
5435 }
5436
5437 static DEFINE_MUTEX(qeth_mod_mutex);    /* for synchronized module loading */
5438
5439 int qeth_core_load_discipline(struct qeth_card *card,
5440                 enum qeth_discipline_id discipline)
5441 {
5442         mutex_lock(&qeth_mod_mutex);
5443         switch (discipline) {
5444         case QETH_DISCIPLINE_LAYER3:
5445                 card->discipline = try_then_request_module(
5446                         symbol_get(qeth_l3_discipline), "qeth_l3");
5447                 break;
5448         case QETH_DISCIPLINE_LAYER2:
5449                 card->discipline = try_then_request_module(
5450                         symbol_get(qeth_l2_discipline), "qeth_l2");
5451                 break;
5452         default:
5453                 break;
5454         }
5455         mutex_unlock(&qeth_mod_mutex);
5456
5457         if (!card->discipline) {
5458                 dev_err(&card->gdev->dev, "There is no kernel module to "
5459                         "support discipline %d\n", discipline);
5460                 return -EINVAL;
5461         }
5462
5463         card->options.layer = discipline;
5464         return 0;
5465 }
5466
5467 void qeth_core_free_discipline(struct qeth_card *card)
5468 {
5469         if (IS_LAYER2(card))
5470                 symbol_put(qeth_l2_discipline);
5471         else
5472                 symbol_put(qeth_l3_discipline);
5473         card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
5474         card->discipline = NULL;
5475 }
5476
5477 const struct device_type qeth_generic_devtype = {
5478         .name = "qeth_generic",
5479         .groups = qeth_generic_attr_groups,
5480 };
5481 EXPORT_SYMBOL_GPL(qeth_generic_devtype);
5482
5483 static const struct device_type qeth_osn_devtype = {
5484         .name = "qeth_osn",
5485         .groups = qeth_osn_attr_groups,
5486 };
5487
5488 #define DBF_NAME_LEN    20
5489
5490 struct qeth_dbf_entry {
5491         char dbf_name[DBF_NAME_LEN];
5492         debug_info_t *dbf_info;
5493         struct list_head dbf_list;
5494 };
5495
5496 static LIST_HEAD(qeth_dbf_list);
5497 static DEFINE_MUTEX(qeth_dbf_list_mutex);
5498
5499 static debug_info_t *qeth_get_dbf_entry(char *name)
5500 {
5501         struct qeth_dbf_entry *entry;
5502         debug_info_t *rc = NULL;
5503
5504         mutex_lock(&qeth_dbf_list_mutex);
5505         list_for_each_entry(entry, &qeth_dbf_list, dbf_list) {
5506                 if (strcmp(entry->dbf_name, name) == 0) {
5507                         rc = entry->dbf_info;
5508                         break;
5509                 }
5510         }
5511         mutex_unlock(&qeth_dbf_list_mutex);
5512         return rc;
5513 }
5514
5515 static int qeth_add_dbf_entry(struct qeth_card *card, char *name)
5516 {
5517         struct qeth_dbf_entry *new_entry;
5518
5519         card->debug = debug_register(name, 2, 1, 8);
5520         if (!card->debug) {
5521                 QETH_DBF_TEXT_(SETUP, 2, "%s", "qcdbf");
5522                 goto err;
5523         }
5524         if (debug_register_view(card->debug, &debug_hex_ascii_view))
5525                 goto err_dbg;
5526         new_entry = kzalloc(sizeof(struct qeth_dbf_entry), GFP_KERNEL);
5527         if (!new_entry)
5528                 goto err_dbg;
5529         strncpy(new_entry->dbf_name, name, DBF_NAME_LEN);
5530         new_entry->dbf_info = card->debug;
5531         mutex_lock(&qeth_dbf_list_mutex);
5532         list_add(&new_entry->dbf_list, &qeth_dbf_list);
5533         mutex_unlock(&qeth_dbf_list_mutex);
5534
5535         return 0;
5536
5537 err_dbg:
5538         debug_unregister(card->debug);
5539 err:
5540         return -ENOMEM;
5541 }
5542
5543 static void qeth_clear_dbf_list(void)
5544 {
5545         struct qeth_dbf_entry *entry, *tmp;
5546
5547         mutex_lock(&qeth_dbf_list_mutex);
5548         list_for_each_entry_safe(entry, tmp, &qeth_dbf_list, dbf_list) {
5549                 list_del(&entry->dbf_list);
5550                 debug_unregister(entry->dbf_info);
5551                 kfree(entry);
5552         }
5553         mutex_unlock(&qeth_dbf_list_mutex);
5554 }
5555
5556 static struct net_device *qeth_alloc_netdev(struct qeth_card *card)
5557 {
5558         struct net_device *dev;
5559
5560         switch (card->info.type) {
5561         case QETH_CARD_TYPE_IQD:
5562                 dev = alloc_netdev(0, "hsi%d", NET_NAME_UNKNOWN, ether_setup);
5563                 break;
5564         case QETH_CARD_TYPE_OSN:
5565                 dev = alloc_netdev(0, "osn%d", NET_NAME_UNKNOWN, ether_setup);
5566                 break;
5567         default:
5568                 dev = alloc_etherdev(0);
5569         }
5570
5571         if (!dev)
5572                 return NULL;
5573
5574         dev->ml_priv = card;
5575         dev->watchdog_timeo = QETH_TX_TIMEOUT;
5576         dev->min_mtu = IS_OSN(card) ? 64 : 576;
5577          /* initialized when device first goes online: */
5578         dev->max_mtu = 0;
5579         dev->mtu = 0;
5580         SET_NETDEV_DEV(dev, &card->gdev->dev);
5581         netif_carrier_off(dev);
5582
5583         if (IS_OSN(card)) {
5584                 dev->ethtool_ops = &qeth_osn_ethtool_ops;
5585         } else {
5586                 dev->ethtool_ops = &qeth_ethtool_ops;
5587                 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
5588                 dev->hw_features |= NETIF_F_SG;
5589                 dev->vlan_features |= NETIF_F_SG;
5590                 if (IS_IQD(card))
5591                         dev->features |= NETIF_F_SG;
5592         }
5593
5594         return dev;
5595 }
5596
5597 struct net_device *qeth_clone_netdev(struct net_device *orig)
5598 {
5599         struct net_device *clone = qeth_alloc_netdev(orig->ml_priv);
5600
5601         if (!clone)
5602                 return NULL;
5603
5604         clone->dev_port = orig->dev_port;
5605         return clone;
5606 }
5607
5608 static int qeth_core_probe_device(struct ccwgroup_device *gdev)
5609 {
5610         struct qeth_card *card;
5611         struct device *dev;
5612         int rc;
5613         enum qeth_discipline_id enforced_disc;
5614         char dbf_name[DBF_NAME_LEN];
5615
5616         QETH_DBF_TEXT(SETUP, 2, "probedev");
5617
5618         dev = &gdev->dev;
5619         if (!get_device(dev))
5620                 return -ENODEV;
5621
5622         QETH_DBF_TEXT_(SETUP, 2, "%s", dev_name(&gdev->dev));
5623
5624         card = qeth_alloc_card(gdev);
5625         if (!card) {
5626                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM);
5627                 rc = -ENOMEM;
5628                 goto err_dev;
5629         }
5630
5631         snprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
5632                 dev_name(&gdev->dev));
5633         card->debug = qeth_get_dbf_entry(dbf_name);
5634         if (!card->debug) {
5635                 rc = qeth_add_dbf_entry(card, dbf_name);
5636                 if (rc)
5637                         goto err_card;
5638         }
5639
5640         qeth_setup_card(card);
5641         qeth_update_from_chp_desc(card);
5642
5643         card->dev = qeth_alloc_netdev(card);
5644         if (!card->dev) {
5645                 rc = -ENOMEM;
5646                 goto err_card;
5647         }
5648
5649         qeth_determine_capabilities(card);
5650         enforced_disc = qeth_enforce_discipline(card);
5651         switch (enforced_disc) {
5652         case QETH_DISCIPLINE_UNDETERMINED:
5653                 gdev->dev.type = &qeth_generic_devtype;
5654                 break;
5655         default:
5656                 card->info.layer_enforced = true;
5657                 rc = qeth_core_load_discipline(card, enforced_disc);
5658                 if (rc)
5659                         goto err_load;
5660
5661                 gdev->dev.type = (card->info.type != QETH_CARD_TYPE_OSN)
5662                                         ? card->discipline->devtype
5663                                         : &qeth_osn_devtype;
5664                 rc = card->discipline->setup(card->gdev);
5665                 if (rc)
5666                         goto err_disc;
5667                 break;
5668         }
5669
5670         return 0;
5671
5672 err_disc:
5673         qeth_core_free_discipline(card);
5674 err_load:
5675         free_netdev(card->dev);
5676 err_card:
5677         qeth_core_free_card(card);
5678 err_dev:
5679         put_device(dev);
5680         return rc;
5681 }
5682
5683 static void qeth_core_remove_device(struct ccwgroup_device *gdev)
5684 {
5685         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5686
5687         QETH_DBF_TEXT(SETUP, 2, "removedv");
5688
5689         if (card->discipline) {
5690                 card->discipline->remove(gdev);
5691                 qeth_core_free_discipline(card);
5692         }
5693
5694         free_netdev(card->dev);
5695         qeth_core_free_card(card);
5696         put_device(&gdev->dev);
5697 }
5698
5699 static int qeth_core_set_online(struct ccwgroup_device *gdev)
5700 {
5701         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5702         int rc = 0;
5703         enum qeth_discipline_id def_discipline;
5704
5705         if (!card->discipline) {
5706                 if (card->info.type == QETH_CARD_TYPE_IQD)
5707                         def_discipline = QETH_DISCIPLINE_LAYER3;
5708                 else
5709                         def_discipline = QETH_DISCIPLINE_LAYER2;
5710                 rc = qeth_core_load_discipline(card, def_discipline);
5711                 if (rc)
5712                         goto err;
5713                 rc = card->discipline->setup(card->gdev);
5714                 if (rc) {
5715                         qeth_core_free_discipline(card);
5716                         goto err;
5717                 }
5718         }
5719         rc = card->discipline->set_online(gdev);
5720 err:
5721         return rc;
5722 }
5723
5724 static int qeth_core_set_offline(struct ccwgroup_device *gdev)
5725 {
5726         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5727         return card->discipline->set_offline(gdev);
5728 }
5729
5730 static void qeth_core_shutdown(struct ccwgroup_device *gdev)
5731 {
5732         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5733         qeth_set_allowed_threads(card, 0, 1);
5734         if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
5735                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
5736         qeth_qdio_clear_card(card, 0);
5737         qeth_clear_qdio_buffers(card);
5738         qdio_free(CARD_DDEV(card));
5739 }
5740
5741 static int qeth_core_freeze(struct ccwgroup_device *gdev)
5742 {
5743         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5744         if (card->discipline && card->discipline->freeze)
5745                 return card->discipline->freeze(gdev);
5746         return 0;
5747 }
5748
5749 static int qeth_core_thaw(struct ccwgroup_device *gdev)
5750 {
5751         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5752         if (card->discipline && card->discipline->thaw)
5753                 return card->discipline->thaw(gdev);
5754         return 0;
5755 }
5756
5757 static int qeth_core_restore(struct ccwgroup_device *gdev)
5758 {
5759         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5760         if (card->discipline && card->discipline->restore)
5761                 return card->discipline->restore(gdev);
5762         return 0;
5763 }
5764
5765 static ssize_t group_store(struct device_driver *ddrv, const char *buf,
5766                            size_t count)
5767 {
5768         int err;
5769
5770         err = ccwgroup_create_dev(qeth_core_root_dev, to_ccwgroupdrv(ddrv), 3,
5771                                   buf);
5772
5773         return err ? err : count;
5774 }
5775 static DRIVER_ATTR_WO(group);
5776
5777 static struct attribute *qeth_drv_attrs[] = {
5778         &driver_attr_group.attr,
5779         NULL,
5780 };
5781 static struct attribute_group qeth_drv_attr_group = {
5782         .attrs = qeth_drv_attrs,
5783 };
5784 static const struct attribute_group *qeth_drv_attr_groups[] = {
5785         &qeth_drv_attr_group,
5786         NULL,
5787 };
5788
5789 static struct ccwgroup_driver qeth_core_ccwgroup_driver = {
5790         .driver = {
5791                 .groups = qeth_drv_attr_groups,
5792                 .owner = THIS_MODULE,
5793                 .name = "qeth",
5794         },
5795         .ccw_driver = &qeth_ccw_driver,
5796         .setup = qeth_core_probe_device,
5797         .remove = qeth_core_remove_device,
5798         .set_online = qeth_core_set_online,
5799         .set_offline = qeth_core_set_offline,
5800         .shutdown = qeth_core_shutdown,
5801         .prepare = NULL,
5802         .complete = NULL,
5803         .freeze = qeth_core_freeze,
5804         .thaw = qeth_core_thaw,
5805         .restore = qeth_core_restore,
5806 };
5807
5808 struct qeth_card *qeth_get_card_by_busid(char *bus_id)
5809 {
5810         struct ccwgroup_device *gdev;
5811         struct qeth_card *card;
5812
5813         gdev = get_ccwgroupdev_by_busid(&qeth_core_ccwgroup_driver, bus_id);
5814         if (!gdev)
5815                 return NULL;
5816
5817         card = dev_get_drvdata(&gdev->dev);
5818         put_device(&gdev->dev);
5819         return card;
5820 }
5821 EXPORT_SYMBOL_GPL(qeth_get_card_by_busid);
5822
5823 int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
5824 {
5825         struct qeth_card *card = dev->ml_priv;
5826         struct mii_ioctl_data *mii_data;
5827         int rc = 0;
5828
5829         if (!card)
5830                 return -ENODEV;
5831
5832         switch (cmd) {
5833         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
5834                 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
5835                 break;
5836         case SIOC_QETH_GET_CARD_TYPE:
5837                 if ((card->info.type == QETH_CARD_TYPE_OSD ||
5838                      card->info.type == QETH_CARD_TYPE_OSM ||
5839                      card->info.type == QETH_CARD_TYPE_OSX) &&
5840                     !card->info.guestlan)
5841                         return 1;
5842                 else
5843                         return 0;
5844         case SIOCGMIIPHY:
5845                 mii_data = if_mii(rq);
5846                 mii_data->phy_id = 0;
5847                 break;
5848         case SIOCGMIIREG:
5849                 mii_data = if_mii(rq);
5850                 if (mii_data->phy_id != 0)
5851                         rc = -EINVAL;
5852                 else
5853                         mii_data->val_out = qeth_mdio_read(dev,
5854                                 mii_data->phy_id, mii_data->reg_num);
5855                 break;
5856         case SIOC_QETH_QUERY_OAT:
5857                 rc = qeth_query_oat_command(card, rq->ifr_ifru.ifru_data);
5858                 break;
5859         default:
5860                 if (card->discipline->do_ioctl)
5861                         rc = card->discipline->do_ioctl(dev, rq, cmd);
5862                 else
5863                         rc = -EOPNOTSUPP;
5864         }
5865         if (rc)
5866                 QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
5867         return rc;
5868 }
5869 EXPORT_SYMBOL_GPL(qeth_do_ioctl);
5870
5871 static int qeth_start_csum_cb(struct qeth_card *card, struct qeth_reply *reply,
5872                               unsigned long data)
5873 {
5874         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5875         u32 *features = reply->param;
5876
5877         if (qeth_setassparms_inspect_rc(cmd))
5878                 return -EIO;
5879
5880         *features = cmd->data.setassparms.data.flags_32bit;
5881         return 0;
5882 }
5883
5884 static int qeth_set_csum_off(struct qeth_card *card, enum qeth_ipa_funcs cstype,
5885                              enum qeth_prot_versions prot)
5886 {
5887         return qeth_send_simple_setassparms_prot(card, cstype,
5888                                                  IPA_CMD_ASS_STOP, 0, prot);
5889 }
5890
5891 static int qeth_set_csum_on(struct qeth_card *card, enum qeth_ipa_funcs cstype,
5892                             enum qeth_prot_versions prot)
5893 {
5894         u32 required_features = QETH_IPA_CHECKSUM_UDP | QETH_IPA_CHECKSUM_TCP;
5895         struct qeth_cmd_buffer *iob;
5896         struct qeth_ipa_caps caps;
5897         u32 features;
5898         int rc;
5899
5900         /* some L3 HW requires combined L3+L4 csum offload: */
5901         if (IS_LAYER3(card) && prot == QETH_PROT_IPV4 &&
5902             cstype == IPA_OUTBOUND_CHECKSUM)
5903                 required_features |= QETH_IPA_CHECKSUM_IP_HDR;
5904
5905         iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_START, 0,
5906                                        prot);
5907         if (!iob)
5908                 return -ENOMEM;
5909
5910         rc = qeth_send_ipa_cmd(card, iob, qeth_start_csum_cb, &features);
5911         if (rc)
5912                 return rc;
5913
5914         if ((required_features & features) != required_features) {
5915                 qeth_set_csum_off(card, cstype, prot);
5916                 return -EOPNOTSUPP;
5917         }
5918
5919         iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_ENABLE, 4,
5920                                        prot);
5921         if (!iob) {
5922                 qeth_set_csum_off(card, cstype, prot);
5923                 return -ENOMEM;
5924         }
5925
5926         if (features & QETH_IPA_CHECKSUM_LP2LP)
5927                 required_features |= QETH_IPA_CHECKSUM_LP2LP;
5928         __ipa_cmd(iob)->data.setassparms.data.flags_32bit = required_features;
5929         rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
5930         if (rc) {
5931                 qeth_set_csum_off(card, cstype, prot);
5932                 return rc;
5933         }
5934
5935         if (!qeth_ipa_caps_supported(&caps, required_features) ||
5936             !qeth_ipa_caps_enabled(&caps, required_features)) {
5937                 qeth_set_csum_off(card, cstype, prot);
5938                 return -EOPNOTSUPP;
5939         }
5940
5941         dev_info(&card->gdev->dev, "HW Checksumming (%sbound IPv%d) enabled\n",
5942                  cstype == IPA_INBOUND_CHECKSUM ? "in" : "out", prot);
5943         if (!qeth_ipa_caps_enabled(&caps, QETH_IPA_CHECKSUM_LP2LP) &&
5944             cstype == IPA_OUTBOUND_CHECKSUM)
5945                 dev_warn(&card->gdev->dev,
5946                          "Hardware checksumming is performed only if %s and its peer use different OSA Express 3 ports\n",
5947                          QETH_CARD_IFNAME(card));
5948         return 0;
5949 }
5950
5951 static int qeth_set_ipa_csum(struct qeth_card *card, bool on, int cstype,
5952                              enum qeth_prot_versions prot)
5953 {
5954         return on ? qeth_set_csum_on(card, cstype, prot) :
5955                     qeth_set_csum_off(card, cstype, prot);
5956 }
5957
5958 static int qeth_start_tso_cb(struct qeth_card *card, struct qeth_reply *reply,
5959                              unsigned long data)
5960 {
5961         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5962         struct qeth_tso_start_data *tso_data = reply->param;
5963
5964         if (qeth_setassparms_inspect_rc(cmd))
5965                 return -EIO;
5966
5967         tso_data->mss = cmd->data.setassparms.data.tso.mss;
5968         tso_data->supported = cmd->data.setassparms.data.tso.supported;
5969         return 0;
5970 }
5971
5972 static int qeth_set_tso_off(struct qeth_card *card,
5973                             enum qeth_prot_versions prot)
5974 {
5975         return qeth_send_simple_setassparms_prot(card, IPA_OUTBOUND_TSO,
5976                                                  IPA_CMD_ASS_STOP, 0, prot);
5977 }
5978
5979 static int qeth_set_tso_on(struct qeth_card *card,
5980                            enum qeth_prot_versions prot)
5981 {
5982         struct qeth_tso_start_data tso_data;
5983         struct qeth_cmd_buffer *iob;
5984         struct qeth_ipa_caps caps;
5985         int rc;
5986
5987         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
5988                                        IPA_CMD_ASS_START, 0, prot);
5989         if (!iob)
5990                 return -ENOMEM;
5991
5992         rc = qeth_send_ipa_cmd(card, iob, qeth_start_tso_cb, &tso_data);
5993         if (rc)
5994                 return rc;
5995
5996         if (!tso_data.mss || !(tso_data.supported & QETH_IPA_LARGE_SEND_TCP)) {
5997                 qeth_set_tso_off(card, prot);
5998                 return -EOPNOTSUPP;
5999         }
6000
6001         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6002                                        IPA_CMD_ASS_ENABLE, sizeof(caps), prot);
6003         if (!iob) {
6004                 qeth_set_tso_off(card, prot);
6005                 return -ENOMEM;
6006         }
6007
6008         /* enable TSO capability */
6009         __ipa_cmd(iob)->data.setassparms.data.caps.enabled =
6010                 QETH_IPA_LARGE_SEND_TCP;
6011         rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6012         if (rc) {
6013                 qeth_set_tso_off(card, prot);
6014                 return rc;
6015         }
6016
6017         if (!qeth_ipa_caps_supported(&caps, QETH_IPA_LARGE_SEND_TCP) ||
6018             !qeth_ipa_caps_enabled(&caps, QETH_IPA_LARGE_SEND_TCP)) {
6019                 qeth_set_tso_off(card, prot);
6020                 return -EOPNOTSUPP;
6021         }
6022
6023         dev_info(&card->gdev->dev, "TSOv%u enabled (MSS: %u)\n", prot,
6024                  tso_data.mss);
6025         return 0;
6026 }
6027
6028 static int qeth_set_ipa_tso(struct qeth_card *card, bool on,
6029                             enum qeth_prot_versions prot)
6030 {
6031         return on ? qeth_set_tso_on(card, prot) : qeth_set_tso_off(card, prot);
6032 }
6033
6034 static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on)
6035 {
6036         int rc_ipv4 = (on) ? -EOPNOTSUPP : 0;
6037         int rc_ipv6;
6038
6039         if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
6040                 rc_ipv4 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6041                                             QETH_PROT_IPV4);
6042         if (!qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6043                 /* no/one Offload Assist available, so the rc is trivial */
6044                 return rc_ipv4;
6045
6046         rc_ipv6 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6047                                     QETH_PROT_IPV6);
6048
6049         if (on)
6050                 /* enable: success if any Assist is active */
6051                 return (rc_ipv6) ? rc_ipv4 : 0;
6052
6053         /* disable: failure if any Assist is still active */
6054         return (rc_ipv6) ? rc_ipv6 : rc_ipv4;
6055 }
6056
6057 /**
6058  * qeth_enable_hw_features() - (Re-)Enable HW functions for device features
6059  * @dev:        a net_device
6060  */
6061 void qeth_enable_hw_features(struct net_device *dev)
6062 {
6063         struct qeth_card *card = dev->ml_priv;
6064         netdev_features_t features;
6065
6066         features = dev->features;
6067         /* force-off any feature that might need an IPA sequence.
6068          * netdev_update_features() will restart them.
6069          */
6070         dev->features &= ~dev->hw_features;
6071         /* toggle VLAN filter, so that VIDs are re-programmed: */
6072         if (IS_LAYER2(card) && IS_VM_NIC(card)) {
6073                 dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
6074                 dev->wanted_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
6075         }
6076         netdev_update_features(dev);
6077         if (features != dev->features)
6078                 dev_warn(&card->gdev->dev,
6079                          "Device recovery failed to restore all offload features\n");
6080 }
6081 EXPORT_SYMBOL_GPL(qeth_enable_hw_features);
6082
6083 int qeth_set_features(struct net_device *dev, netdev_features_t features)
6084 {
6085         struct qeth_card *card = dev->ml_priv;
6086         netdev_features_t changed = dev->features ^ features;
6087         int rc = 0;
6088
6089         QETH_DBF_TEXT(SETUP, 2, "setfeat");
6090         QETH_DBF_HEX(SETUP, 2, &features, sizeof(features));
6091
6092         if ((changed & NETIF_F_IP_CSUM)) {
6093                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IP_CSUM,
6094                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV4);
6095                 if (rc)
6096                         changed ^= NETIF_F_IP_CSUM;
6097         }
6098         if (changed & NETIF_F_IPV6_CSUM) {
6099                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IPV6_CSUM,
6100                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV6);
6101                 if (rc)
6102                         changed ^= NETIF_F_IPV6_CSUM;
6103         }
6104         if (changed & NETIF_F_RXCSUM) {
6105                 rc = qeth_set_ipa_rx_csum(card, features & NETIF_F_RXCSUM);
6106                 if (rc)
6107                         changed ^= NETIF_F_RXCSUM;
6108         }
6109         if (changed & NETIF_F_TSO) {
6110                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO,
6111                                       QETH_PROT_IPV4);
6112                 if (rc)
6113                         changed ^= NETIF_F_TSO;
6114         }
6115         if (changed & NETIF_F_TSO6) {
6116                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO6,
6117                                       QETH_PROT_IPV6);
6118                 if (rc)
6119                         changed ^= NETIF_F_TSO6;
6120         }
6121
6122         /* everything changed successfully? */
6123         if ((dev->features ^ features) == changed)
6124                 return 0;
6125         /* something went wrong. save changed features and return error */
6126         dev->features ^= changed;
6127         return -EIO;
6128 }
6129 EXPORT_SYMBOL_GPL(qeth_set_features);
6130
6131 netdev_features_t qeth_fix_features(struct net_device *dev,
6132                                     netdev_features_t features)
6133 {
6134         struct qeth_card *card = dev->ml_priv;
6135
6136         QETH_DBF_TEXT(SETUP, 2, "fixfeat");
6137         if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM))
6138                 features &= ~NETIF_F_IP_CSUM;
6139         if (!qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6))
6140                 features &= ~NETIF_F_IPV6_CSUM;
6141         if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM) &&
6142             !qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6143                 features &= ~NETIF_F_RXCSUM;
6144         if (!qeth_is_supported(card, IPA_OUTBOUND_TSO))
6145                 features &= ~NETIF_F_TSO;
6146         if (!qeth_is_supported6(card, IPA_OUTBOUND_TSO))
6147                 features &= ~NETIF_F_TSO6;
6148
6149         QETH_DBF_HEX(SETUP, 2, &features, sizeof(features));
6150         return features;
6151 }
6152 EXPORT_SYMBOL_GPL(qeth_fix_features);
6153
6154 netdev_features_t qeth_features_check(struct sk_buff *skb,
6155                                       struct net_device *dev,
6156                                       netdev_features_t features)
6157 {
6158         /* GSO segmentation builds skbs with
6159          *      a (small) linear part for the headers, and
6160          *      page frags for the data.
6161          * Compared to a linear skb, the header-only part consumes an
6162          * additional buffer element. This reduces buffer utilization, and
6163          * hurts throughput. So compress small segments into one element.
6164          */
6165         if (netif_needs_gso(skb, features)) {
6166                 /* match skb_segment(): */
6167                 unsigned int doffset = skb->data - skb_mac_header(skb);
6168                 unsigned int hsize = skb_shinfo(skb)->gso_size;
6169                 unsigned int hroom = skb_headroom(skb);
6170
6171                 /* linearize only if resulting skb allocations are order-0: */
6172                 if (SKB_DATA_ALIGN(hroom + doffset + hsize) <= SKB_MAX_HEAD(0))
6173                         features &= ~NETIF_F_SG;
6174         }
6175
6176         return vlan_features_check(skb, features);
6177 }
6178 EXPORT_SYMBOL_GPL(qeth_features_check);
6179
6180 void qeth_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
6181 {
6182         struct qeth_card *card = dev->ml_priv;
6183         struct qeth_qdio_out_q *queue;
6184         unsigned int i;
6185
6186         QETH_CARD_TEXT(card, 5, "getstat");
6187
6188         stats->rx_packets = card->stats.rx_packets;
6189         stats->rx_bytes = card->stats.rx_bytes;
6190         stats->rx_errors = card->stats.rx_errors;
6191         stats->rx_dropped = card->stats.rx_dropped;
6192         stats->multicast = card->stats.rx_multicast;
6193         stats->tx_errors = card->stats.tx_errors;
6194
6195         for (i = 0; i < card->qdio.no_out_queues; i++) {
6196                 queue = card->qdio.out_qs[i];
6197
6198                 stats->tx_packets += queue->stats.tx_packets;
6199                 stats->tx_bytes += queue->stats.tx_bytes;
6200                 stats->tx_errors += queue->stats.tx_errors;
6201                 stats->tx_dropped += queue->stats.tx_dropped;
6202         }
6203 }
6204 EXPORT_SYMBOL_GPL(qeth_get_stats64);
6205
6206 int qeth_open(struct net_device *dev)
6207 {
6208         struct qeth_card *card = dev->ml_priv;
6209
6210         QETH_CARD_TEXT(card, 4, "qethopen");
6211
6212         if (qdio_stop_irq(CARD_DDEV(card), 0) < 0)
6213                 return -EIO;
6214
6215         card->data.state = CH_STATE_UP;
6216         netif_start_queue(dev);
6217
6218         napi_enable(&card->napi);
6219         local_bh_disable();
6220         napi_schedule(&card->napi);
6221         /* kick-start the NAPI softirq: */
6222         local_bh_enable();
6223         return 0;
6224 }
6225 EXPORT_SYMBOL_GPL(qeth_open);
6226
6227 int qeth_stop(struct net_device *dev)
6228 {
6229         struct qeth_card *card = dev->ml_priv;
6230
6231         QETH_CARD_TEXT(card, 4, "qethstop");
6232         netif_tx_disable(dev);
6233         napi_disable(&card->napi);
6234         return 0;
6235 }
6236 EXPORT_SYMBOL_GPL(qeth_stop);
6237
6238 static int __init qeth_core_init(void)
6239 {
6240         int rc;
6241
6242         pr_info("loading core functions\n");
6243
6244         rc = qeth_register_dbf_views();
6245         if (rc)
6246                 goto dbf_err;
6247         qeth_core_root_dev = root_device_register("qeth");
6248         rc = PTR_ERR_OR_ZERO(qeth_core_root_dev);
6249         if (rc)
6250                 goto register_err;
6251         qeth_core_header_cache =
6252                 kmem_cache_create("qeth_hdr", QETH_HDR_CACHE_OBJ_SIZE,
6253                                   roundup_pow_of_two(QETH_HDR_CACHE_OBJ_SIZE),
6254                                   0, NULL);
6255         if (!qeth_core_header_cache) {
6256                 rc = -ENOMEM;
6257                 goto slab_err;
6258         }
6259         qeth_qdio_outbuf_cache = kmem_cache_create("qeth_buf",
6260                         sizeof(struct qeth_qdio_out_buffer), 0, 0, NULL);
6261         if (!qeth_qdio_outbuf_cache) {
6262                 rc = -ENOMEM;
6263                 goto cqslab_err;
6264         }
6265         rc = ccw_driver_register(&qeth_ccw_driver);
6266         if (rc)
6267                 goto ccw_err;
6268         rc = ccwgroup_driver_register(&qeth_core_ccwgroup_driver);
6269         if (rc)
6270                 goto ccwgroup_err;
6271
6272         return 0;
6273
6274 ccwgroup_err:
6275         ccw_driver_unregister(&qeth_ccw_driver);
6276 ccw_err:
6277         kmem_cache_destroy(qeth_qdio_outbuf_cache);
6278 cqslab_err:
6279         kmem_cache_destroy(qeth_core_header_cache);
6280 slab_err:
6281         root_device_unregister(qeth_core_root_dev);
6282 register_err:
6283         qeth_unregister_dbf_views();
6284 dbf_err:
6285         pr_err("Initializing the qeth device driver failed\n");
6286         return rc;
6287 }
6288
6289 static void __exit qeth_core_exit(void)
6290 {
6291         qeth_clear_dbf_list();
6292         ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver);
6293         ccw_driver_unregister(&qeth_ccw_driver);
6294         kmem_cache_destroy(qeth_qdio_outbuf_cache);
6295         kmem_cache_destroy(qeth_core_header_cache);
6296         root_device_unregister(qeth_core_root_dev);
6297         qeth_unregister_dbf_views();
6298         pr_info("core functions removed\n");
6299 }
6300
6301 module_init(qeth_core_init);
6302 module_exit(qeth_core_exit);
6303 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
6304 MODULE_DESCRIPTION("qeth core functions");
6305 MODULE_LICENSE("GPL");