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/io.h>
  21 #include <linux/ip.h>
  22 #include <linux/tcp.h>
  23 #include <linux/mii.h>
  24 #include <linux/mm.h>
  25 #include <linux/kthread.h>
  26 #include <linux/slab.h>
  27 #include <linux/if_vlan.h>
  28 #include <linux/netdevice.h>
  29 #include <linux/netdev_features.h>
  30 #include <linux/rcutree.h>
  31 #include <linux/skbuff.h>
  32 #include <linux/vmalloc.h>
  33
  34 #include <net/iucv/af_iucv.h>
  35 #include <net/dsfield.h>
  36 #include <net/sock.h>
  37
  38 #include <asm/ebcdic.h>
  39 #include <asm/chpid.h>
  40 #include <asm/sysinfo.h>
  41 #include <asm/diag.h>
  42 #include <asm/cio.h>
  43 #include <asm/ccwdev.h>
  44 #include <asm/cpcmd.h>
  45
  46 #include "qeth_core.h"
  47
  48 struct qeth_dbf_info qeth_dbf[QETH_DBF_INFOS] = {
  49         /* define dbf - Name, Pages, Areas, Maxlen, Level, View, Handle */
  50         /*                   N  P  A    M  L  V                      H  */
  51         [QETH_DBF_SETUP] = {"qeth_setup",
  52                                 8, 1,   8, 5, &debug_hex_ascii_view, NULL},
  53         [QETH_DBF_MSG]   = {"qeth_msg", 8, 1, 11 * sizeof(long), 3,
  54                             &debug_sprintf_view, NULL},
  55         [QETH_DBF_CTRL]  = {"qeth_control",
  56                 8, 1, QETH_DBF_CTRL_LEN, 5, &debug_hex_ascii_view, NULL},
  57 };
  58 EXPORT_SYMBOL_GPL(qeth_dbf);
  59
  60 struct kmem_cache *qeth_core_header_cache;
  61 EXPORT_SYMBOL_GPL(qeth_core_header_cache);
  62 static struct kmem_cache *qeth_qdio_outbuf_cache;
  63
  64 static struct device *qeth_core_root_dev;
  65 static struct dentry *qeth_debugfs_root;
  66 static struct lock_class_key qdio_out_skb_queue_key;
  67
  68 static void qeth_issue_next_read_cb(struct qeth_card *card,
  69                                     struct qeth_cmd_buffer *iob,
  70                                     unsigned int data_length);
  71 static int qeth_qdio_establish(struct qeth_card *);
  72 static void qeth_free_qdio_queues(struct qeth_card *card);
  73 static void qeth_notify_skbs(struct qeth_qdio_out_q *queue,
  74                 struct qeth_qdio_out_buffer *buf,
  75                 enum iucv_tx_notify notification);
  76
  77 static void qeth_close_dev_handler(struct work_struct *work)
  78 {
  79         struct qeth_card *card;
  80
  81         card = container_of(work, struct qeth_card, close_dev_work);
  82         QETH_CARD_TEXT(card, 2, "cldevhdl");
  83         ccwgroup_set_offline(card->gdev);
  84 }
  85
  86 static const char *qeth_get_cardname(struct qeth_card *card)
  87 {
  88         if (IS_VM_NIC(card)) {
  89                 switch (card->info.type) {
  90                 case QETH_CARD_TYPE_OSD:
  91                         return " Virtual NIC QDIO";
  92                 case QETH_CARD_TYPE_IQD:
  93                         return " Virtual NIC Hiper";
  94                 case QETH_CARD_TYPE_OSM:
  95                         return " Virtual NIC QDIO - OSM";
  96                 case QETH_CARD_TYPE_OSX:
  97                         return " Virtual NIC QDIO - OSX";
  98                 default:
  99                         return " unknown";
 100                 }
 101         } else {
 102                 switch (card->info.type) {
 103                 case QETH_CARD_TYPE_OSD:
 104                         return " OSD Express";
 105                 case QETH_CARD_TYPE_IQD:
 106                         return " HiperSockets";
 107                 case QETH_CARD_TYPE_OSN:
 108                         return " OSN QDIO";
 109                 case QETH_CARD_TYPE_OSM:
 110                         return " OSM QDIO";
 111                 case QETH_CARD_TYPE_OSX:
 112                         return " OSX QDIO";
 113                 default:
 114                         return " unknown";
 115                 }
 116         }
 117         return " n/a";
 118 }
 119
 120 /* max length to be returned: 14 */
 121 const char *qeth_get_cardname_short(struct qeth_card *card)
 122 {
 123         if (IS_VM_NIC(card)) {
 124                 switch (card->info.type) {
 125                 case QETH_CARD_TYPE_OSD:
 126                         return "Virt.NIC QDIO";
 127                 case QETH_CARD_TYPE_IQD:
 128                         return "Virt.NIC Hiper";
 129                 case QETH_CARD_TYPE_OSM:
 130                         return "Virt.NIC OSM";
 131                 case QETH_CARD_TYPE_OSX:
 132                         return "Virt.NIC OSX";
 133                 default:
 134                         return "unknown";
 135                 }
 136         } else {
 137                 switch (card->info.type) {
 138                 case QETH_CARD_TYPE_OSD:
 139                         switch (card->info.link_type) {
 140                         case QETH_LINK_TYPE_FAST_ETH:
 141                                 return "OSD_100";
 142                         case QETH_LINK_TYPE_HSTR:
 143                                 return "HSTR";
 144                         case QETH_LINK_TYPE_GBIT_ETH:
 145                                 return "OSD_1000";
 146                         case QETH_LINK_TYPE_10GBIT_ETH:
 147                                 return "OSD_10GIG";
 148                         case QETH_LINK_TYPE_25GBIT_ETH:
 149                                 return "OSD_25GIG";
 150                         case QETH_LINK_TYPE_LANE_ETH100:
 151                                 return "OSD_FE_LANE";
 152                         case QETH_LINK_TYPE_LANE_TR:
 153                                 return "OSD_TR_LANE";
 154                         case QETH_LINK_TYPE_LANE_ETH1000:
 155                                 return "OSD_GbE_LANE";
 156                         case QETH_LINK_TYPE_LANE:
 157                                 return "OSD_ATM_LANE";
 158                         default:
 159                                 return "OSD_Express";
 160                         }
 161                 case QETH_CARD_TYPE_IQD:
 162                         return "HiperSockets";
 163                 case QETH_CARD_TYPE_OSN:
 164                         return "OSN";
 165                 case QETH_CARD_TYPE_OSM:
 166                         return "OSM_1000";
 167                 case QETH_CARD_TYPE_OSX:
 168                         return "OSX_10GIG";
 169                 default:
 170                         return "unknown";
 171                 }
 172         }
 173         return "n/a";
 174 }
 175
 176 void qeth_set_allowed_threads(struct qeth_card *card, unsigned long threads,
 177                          int clear_start_mask)
 178 {
 179         unsigned long flags;
 180
 181         spin_lock_irqsave(&card->thread_mask_lock, flags);
 182         card->thread_allowed_mask = threads;
 183         if (clear_start_mask)
 184                 card->thread_start_mask &= threads;
 185         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 186         wake_up(&card->wait_q);
 187 }
 188 EXPORT_SYMBOL_GPL(qeth_set_allowed_threads);
 189
 190 int qeth_threads_running(struct qeth_card *card, unsigned long threads)
 191 {
 192         unsigned long flags;
 193         int rc = 0;
 194
 195         spin_lock_irqsave(&card->thread_mask_lock, flags);
 196         rc = (card->thread_running_mask & threads);
 197         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 198         return rc;
 199 }
 200 EXPORT_SYMBOL_GPL(qeth_threads_running);
 201
 202 static void qeth_clear_working_pool_list(struct qeth_card *card)
 203 {
 204         struct qeth_buffer_pool_entry *pool_entry, *tmp;
 205         struct qeth_qdio_q *queue = card->qdio.in_q;
 206         unsigned int i;
 207
 208         QETH_CARD_TEXT(card, 5, "clwrklst");
 209         list_for_each_entry_safe(pool_entry, tmp,
 210                                  &card->qdio.in_buf_pool.entry_list, list)
 211                 list_del(&pool_entry->list);
 212
 213         if (!queue)
 214                 return;
 215
 216         for (i = 0; i < ARRAY_SIZE(queue->bufs); i++)
 217                 queue->bufs[i].pool_entry = NULL;
 218 }
 219
 220 static void qeth_free_pool_entry(struct qeth_buffer_pool_entry *entry)
 221 {
 222         unsigned int i;
 223
 224         for (i = 0; i < ARRAY_SIZE(entry->elements); i++) {
 225                 if (entry->elements[i])
 226                         __free_page(entry->elements[i]);
 227         }
 228
 229         kfree(entry);
 230 }
 231
 232 static void qeth_free_buffer_pool(struct qeth_card *card)
 233 {
 234         struct qeth_buffer_pool_entry *entry, *tmp;
 235
 236         list_for_each_entry_safe(entry, tmp, &card->qdio.init_pool.entry_list,
 237                                  init_list) {
 238                 list_del(&entry->init_list);
 239                 qeth_free_pool_entry(entry);
 240         }
 241 }
 242
 243 static struct qeth_buffer_pool_entry *qeth_alloc_pool_entry(unsigned int pages)
 244 {
 245         struct qeth_buffer_pool_entry *entry;
 246         unsigned int i;
 247
 248         entry = kzalloc(sizeof(*entry), GFP_KERNEL);
 249         if (!entry)
 250                 return NULL;
 251
 252         for (i = 0; i < pages; i++) {
 253                 entry->elements[i] = __dev_alloc_page(GFP_KERNEL);
 254
 255                 if (!entry->elements[i]) {
 256                         qeth_free_pool_entry(entry);
 257                         return NULL;
 258                 }
 259         }
 260
 261         return entry;
 262 }
 263
 264 static int qeth_alloc_buffer_pool(struct qeth_card *card)
 265 {
 266         unsigned int buf_elements = QETH_MAX_BUFFER_ELEMENTS(card);
 267         unsigned int i;
 268
 269         QETH_CARD_TEXT(card, 5, "alocpool");
 270         for (i = 0; i < card->qdio.init_pool.buf_count; ++i) {
 271                 struct qeth_buffer_pool_entry *entry;
 272
 273                 entry = qeth_alloc_pool_entry(buf_elements);
 274                 if (!entry) {
 275                         qeth_free_buffer_pool(card);
 276                         return -ENOMEM;
 277                 }
 278
 279                 list_add(&entry->init_list, &card->qdio.init_pool.entry_list);
 280         }
 281         return 0;
 282 }
 283
 284 int qeth_resize_buffer_pool(struct qeth_card *card, unsigned int count)
 285 {
 286         unsigned int buf_elements = QETH_MAX_BUFFER_ELEMENTS(card);
 287         struct qeth_qdio_buffer_pool *pool = &card->qdio.init_pool;
 288         struct qeth_buffer_pool_entry *entry, *tmp;
 289         int delta = count - pool->buf_count;
 290         LIST_HEAD(entries);
 291
 292         QETH_CARD_TEXT(card, 2, "realcbp");
 293
 294         /* Defer until queue is allocated: */
 295         if (!card->qdio.in_q)
 296                 goto out;
 297
 298         /* Remove entries from the pool: */
 299         while (delta < 0) {
 300                 entry = list_first_entry(&pool->entry_list,
 301                                          struct qeth_buffer_pool_entry,
 302                                          init_list);
 303                 list_del(&entry->init_list);
 304                 qeth_free_pool_entry(entry);
 305
 306                 delta++;
 307         }
 308
 309         /* Allocate additional entries: */
 310         while (delta > 0) {
 311                 entry = qeth_alloc_pool_entry(buf_elements);
 312                 if (!entry) {
 313                         list_for_each_entry_safe(entry, tmp, &entries,
 314                                                  init_list) {
 315                                 list_del(&entry->init_list);
 316                                 qeth_free_pool_entry(entry);
 317                         }
 318
 319                         return -ENOMEM;
 320                 }
 321
 322                 list_add(&entry->init_list, &entries);
 323
 324                 delta--;
 325         }
 326
 327         list_splice(&entries, &pool->entry_list);
 328
 329 out:
 330         card->qdio.in_buf_pool.buf_count = count;
 331         pool->buf_count = count;
 332         return 0;
 333 }
 334 EXPORT_SYMBOL_GPL(qeth_resize_buffer_pool);
 335
 336 static void qeth_free_qdio_queue(struct qeth_qdio_q *q)
 337 {
 338         if (!q)
 339                 return;
 340
 341         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
 342         kfree(q);
 343 }
 344
 345 static struct qeth_qdio_q *qeth_alloc_qdio_queue(void)
 346 {
 347         struct qeth_qdio_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
 348         int i;
 349
 350         if (!q)
 351                 return NULL;
 352
 353         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
 354                 kfree(q);
 355                 return NULL;
 356         }
 357
 358         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i)
 359                 q->bufs[i].buffer = q->qdio_bufs[i];
 360
 361         QETH_DBF_HEX(SETUP, 2, &q, sizeof(void *));
 362         return q;
 363 }
 364
 365 static int qeth_cq_init(struct qeth_card *card)
 366 {
 367         int rc;
 368
 369         if (card->options.cq == QETH_CQ_ENABLED) {
 370                 QETH_CARD_TEXT(card, 2, "cqinit");
 371                 qdio_reset_buffers(card->qdio.c_q->qdio_bufs,
 372                                    QDIO_MAX_BUFFERS_PER_Q);
 373                 card->qdio.c_q->next_buf_to_init = 127;
 374                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT,
 375                              card->qdio.no_in_queues - 1, 0,
 376                              127);
 377                 if (rc) {
 378                         QETH_CARD_TEXT_(card, 2, "1err%d", rc);
 379                         goto out;
 380                 }
 381         }
 382         rc = 0;
 383 out:
 384         return rc;
 385 }
 386
 387 static int qeth_alloc_cq(struct qeth_card *card)
 388 {
 389         int rc;
 390
 391         if (card->options.cq == QETH_CQ_ENABLED) {
 392                 int i;
 393                 struct qdio_outbuf_state *outbuf_states;
 394
 395                 QETH_CARD_TEXT(card, 2, "cqon");
 396                 card->qdio.c_q = qeth_alloc_qdio_queue();
 397                 if (!card->qdio.c_q) {
 398                         rc = -1;
 399                         goto kmsg_out;
 400                 }
 401                 card->qdio.no_in_queues = 2;
 402                 card->qdio.out_bufstates =
 403                         kcalloc(card->qdio.no_out_queues *
 404                                         QDIO_MAX_BUFFERS_PER_Q,
 405                                 sizeof(struct qdio_outbuf_state),
 406                                 GFP_KERNEL);
 407                 outbuf_states = card->qdio.out_bufstates;
 408                 if (outbuf_states == NULL) {
 409                         rc = -1;
 410                         goto free_cq_out;
 411                 }
 412                 for (i = 0; i < card->qdio.no_out_queues; ++i) {
 413                         card->qdio.out_qs[i]->bufstates = outbuf_states;
 414                         outbuf_states += QDIO_MAX_BUFFERS_PER_Q;
 415                 }
 416         } else {
 417                 QETH_CARD_TEXT(card, 2, "nocq");
 418                 card->qdio.c_q = NULL;
 419                 card->qdio.no_in_queues = 1;
 420         }
 421         QETH_CARD_TEXT_(card, 2, "iqc%d", card->qdio.no_in_queues);
 422         rc = 0;
 423 out:
 424         return rc;
 425 free_cq_out:
 426         qeth_free_qdio_queue(card->qdio.c_q);
 427         card->qdio.c_q = NULL;
 428 kmsg_out:
 429         dev_err(&card->gdev->dev, "Failed to create completion queue\n");
 430         goto out;
 431 }
 432
 433 static void qeth_free_cq(struct qeth_card *card)
 434 {
 435         if (card->qdio.c_q) {
 436                 --card->qdio.no_in_queues;
 437                 qeth_free_qdio_queue(card->qdio.c_q);
 438                 card->qdio.c_q = NULL;
 439         }
 440         kfree(card->qdio.out_bufstates);
 441         card->qdio.out_bufstates = NULL;
 442 }
 443
 444 static enum iucv_tx_notify qeth_compute_cq_notification(int sbalf15,
 445                                                         int delayed)
 446 {
 447         enum iucv_tx_notify n;
 448
 449         switch (sbalf15) {
 450         case 0:
 451                 n = delayed ? TX_NOTIFY_DELAYED_OK : TX_NOTIFY_OK;
 452                 break;
 453         case 4:
 454         case 16:
 455         case 17:
 456         case 18:
 457                 n = delayed ? TX_NOTIFY_DELAYED_UNREACHABLE :
 458                         TX_NOTIFY_UNREACHABLE;
 459                 break;
 460         default:
 461                 n = delayed ? TX_NOTIFY_DELAYED_GENERALERROR :
 462                         TX_NOTIFY_GENERALERROR;
 463                 break;
 464         }
 465
 466         return n;
 467 }
 468
 469 static void qeth_qdio_handle_aob(struct qeth_card *card,
 470                                  unsigned long phys_aob_addr)
 471 {
 472         enum qeth_qdio_out_buffer_state new_state = QETH_QDIO_BUF_QAOB_OK;
 473         struct qaob *aob;
 474         struct qeth_qdio_out_buffer *buffer;
 475         enum iucv_tx_notify notification;
 476         struct qeth_qdio_out_q *queue;
 477         unsigned int i;
 478
 479         aob = (struct qaob *) phys_to_virt(phys_aob_addr);
 480         QETH_CARD_TEXT(card, 5, "haob");
 481         QETH_CARD_TEXT_(card, 5, "%lx", phys_aob_addr);
 482         buffer = (struct qeth_qdio_out_buffer *) aob->user1;
 483         QETH_CARD_TEXT_(card, 5, "%lx", aob->user1);
 484
 485         if (aob->aorc) {
 486                 QETH_CARD_TEXT_(card, 2, "aorc%02X", aob->aorc);
 487                 new_state = QETH_QDIO_BUF_QAOB_ERROR;
 488         }
 489
 490         switch (atomic_xchg(&buffer->state, new_state)) {
 491         case QETH_QDIO_BUF_PRIMED:
 492                 /* Faster than TX completion code, let it handle the async
 493                  * completion for us.
 494                  */
 495                 break;
 496         case QETH_QDIO_BUF_PENDING:
 497                 /* TX completion code is active and will handle the async
 498                  * completion for us.
 499                  */
 500                 break;
 501         case QETH_QDIO_BUF_NEED_QAOB:
 502                 /* TX completion code is already finished. */
 503                 notification = qeth_compute_cq_notification(aob->aorc, 1);
 504                 qeth_notify_skbs(buffer->q, buffer, notification);
 505
 506                 /* Free dangling allocations. The attached skbs are handled by
 507                  * qeth_tx_complete_pending_bufs().
 508                  */
 509                 for (i = 0;
 510                      i < aob->sb_count && i < QETH_MAX_BUFFER_ELEMENTS(card);
 511                      i++) {
 512                         void *data = phys_to_virt(aob->sba[i]);
 513
 514                         if (data && buffer->is_header[i])
 515                                 kmem_cache_free(qeth_core_header_cache, data);
 516                 }
 517
 518                 queue = buffer->q;
 519                 atomic_set(&buffer->state, QETH_QDIO_BUF_EMPTY);
 520                 napi_schedule(&queue->napi);
 521                 break;
 522         default:
 523                 WARN_ON_ONCE(1);
 524         }
 525
 526         qdio_release_aob(aob);
 527 }
 528
 529 static void qeth_setup_ccw(struct ccw1 *ccw, u8 cmd_code, u8 flags, u32 len,
 530                            void *data)
 531 {
 532         ccw->cmd_code = cmd_code;
 533         ccw->flags = flags | CCW_FLAG_SLI;
 534         ccw->count = len;
 535         ccw->cda = (__u32) __pa(data);
 536 }
 537
 538 static int __qeth_issue_next_read(struct qeth_card *card)
 539 {
 540         struct qeth_cmd_buffer *iob = card->read_cmd;
 541         struct qeth_channel *channel = iob->channel;
 542         struct ccw1 *ccw = __ccw_from_cmd(iob);
 543         int rc;
 544
 545         QETH_CARD_TEXT(card, 5, "issnxrd");
 546         if (channel->state != CH_STATE_UP)
 547                 return -EIO;
 548
 549         memset(iob->data, 0, iob->length);
 550         qeth_setup_ccw(ccw, CCW_CMD_READ, 0, iob->length, iob->data);
 551         iob->callback = qeth_issue_next_read_cb;
 552         /* keep the cmd alive after completion: */
 553         qeth_get_cmd(iob);
 554
 555         QETH_CARD_TEXT(card, 6, "noirqpnd");
 556         rc = ccw_device_start(channel->ccwdev, ccw, (addr_t) iob, 0, 0);
 557         if (!rc) {
 558                 channel->active_cmd = iob;
 559         } else {
 560                 QETH_DBF_MESSAGE(2, "error %i on device %x when starting next read ccw!\n",
 561                                  rc, CARD_DEVID(card));
 562                 qeth_unlock_channel(card, channel);
 563                 qeth_put_cmd(iob);
 564                 card->read_or_write_problem = 1;
 565                 qeth_schedule_recovery(card);
 566         }
 567         return rc;
 568 }
 569
 570 static int qeth_issue_next_read(struct qeth_card *card)
 571 {
 572         int ret;
 573
 574         spin_lock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 575         ret = __qeth_issue_next_read(card);
 576         spin_unlock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 577
 578         return ret;
 579 }
 580
 581 static void qeth_enqueue_cmd(struct qeth_card *card,
 582                              struct qeth_cmd_buffer *iob)
 583 {
 584         spin_lock_irq(&card->lock);
 585         list_add_tail(&iob->list, &card->cmd_waiter_list);
 586         spin_unlock_irq(&card->lock);
 587 }
 588
 589 static void qeth_dequeue_cmd(struct qeth_card *card,
 590                              struct qeth_cmd_buffer *iob)
 591 {
 592         spin_lock_irq(&card->lock);
 593         list_del(&iob->list);
 594         spin_unlock_irq(&card->lock);
 595 }
 596
 597 void qeth_notify_cmd(struct qeth_cmd_buffer *iob, int reason)
 598 {
 599         iob->rc = reason;
 600         complete(&iob->done);
 601 }
 602 EXPORT_SYMBOL_GPL(qeth_notify_cmd);
 603
 604 static void qeth_flush_local_addrs4(struct qeth_card *card)
 605 {
 606         struct qeth_local_addr *addr;
 607         struct hlist_node *tmp;
 608         unsigned int i;
 609
 610         spin_lock_irq(&card->local_addrs4_lock);
 611         hash_for_each_safe(card->local_addrs4, i, tmp, addr, hnode) {
 612                 hash_del_rcu(&addr->hnode);
 613                 kfree_rcu(addr, rcu);
 614         }
 615         spin_unlock_irq(&card->local_addrs4_lock);
 616 }
 617
 618 static void qeth_flush_local_addrs6(struct qeth_card *card)
 619 {
 620         struct qeth_local_addr *addr;
 621         struct hlist_node *tmp;
 622         unsigned int i;
 623
 624         spin_lock_irq(&card->local_addrs6_lock);
 625         hash_for_each_safe(card->local_addrs6, i, tmp, addr, hnode) {
 626                 hash_del_rcu(&addr->hnode);
 627                 kfree_rcu(addr, rcu);
 628         }
 629         spin_unlock_irq(&card->local_addrs6_lock);
 630 }
 631
 632 static void qeth_flush_local_addrs(struct qeth_card *card)
 633 {
 634         qeth_flush_local_addrs4(card);
 635         qeth_flush_local_addrs6(card);
 636 }
 637
 638 static void qeth_add_local_addrs4(struct qeth_card *card,
 639                                   struct qeth_ipacmd_local_addrs4 *cmd)
 640 {
 641         unsigned int i;
 642
 643         if (cmd->addr_length !=
 644             sizeof_field(struct qeth_ipacmd_local_addr4, addr)) {
 645                 dev_err_ratelimited(&card->gdev->dev,
 646                                     "Dropped IPv4 ADD LOCAL ADDR event with bad length %u\n",
 647                                     cmd->addr_length);
 648                 return;
 649         }
 650
 651         spin_lock(&card->local_addrs4_lock);
 652         for (i = 0; i < cmd->count; i++) {
 653                 unsigned int key = ipv4_addr_hash(cmd->addrs[i].addr);
 654                 struct qeth_local_addr *addr;
 655                 bool duplicate = false;
 656
 657                 hash_for_each_possible(card->local_addrs4, addr, hnode, key) {
 658                         if (addr->addr.s6_addr32[3] == cmd->addrs[i].addr) {
 659                                 duplicate = true;
 660                                 break;
 661                         }
 662                 }
 663
 664                 if (duplicate)
 665                         continue;
 666
 667                 addr = kmalloc(sizeof(*addr), GFP_ATOMIC);
 668                 if (!addr) {
 669                         dev_err(&card->gdev->dev,
 670                                 "Failed to allocate local addr object. Traffic to %pI4 might suffer.\n",
 671                                 &cmd->addrs[i].addr);
 672                         continue;
 673                 }
 674
 675                 ipv6_addr_set(&addr->addr, 0, 0, 0, cmd->addrs[i].addr);
 676                 hash_add_rcu(card->local_addrs4, &addr->hnode, key);
 677         }
 678         spin_unlock(&card->local_addrs4_lock);
 679 }
 680
 681 static void qeth_add_local_addrs6(struct qeth_card *card,
 682                                   struct qeth_ipacmd_local_addrs6 *cmd)
 683 {
 684         unsigned int i;
 685
 686         if (cmd->addr_length !=
 687             sizeof_field(struct qeth_ipacmd_local_addr6, addr)) {
 688                 dev_err_ratelimited(&card->gdev->dev,
 689                                     "Dropped IPv6 ADD LOCAL ADDR event with bad length %u\n",
 690                                     cmd->addr_length);
 691                 return;
 692         }
 693
 694         spin_lock(&card->local_addrs6_lock);
 695         for (i = 0; i < cmd->count; i++) {
 696                 u32 key = ipv6_addr_hash(&cmd->addrs[i].addr);
 697                 struct qeth_local_addr *addr;
 698                 bool duplicate = false;
 699
 700                 hash_for_each_possible(card->local_addrs6, addr, hnode, key) {
 701                         if (ipv6_addr_equal(&addr->addr, &cmd->addrs[i].addr)) {
 702                                 duplicate = true;
 703                                 break;
 704                         }
 705                 }
 706
 707                 if (duplicate)
 708                         continue;
 709
 710                 addr = kmalloc(sizeof(*addr), GFP_ATOMIC);
 711                 if (!addr) {
 712                         dev_err(&card->gdev->dev,
 713                                 "Failed to allocate local addr object. Traffic to %pI6c might suffer.\n",
 714                                 &cmd->addrs[i].addr);
 715                         continue;
 716                 }
 717
 718                 addr->addr = cmd->addrs[i].addr;
 719                 hash_add_rcu(card->local_addrs6, &addr->hnode, key);
 720         }
 721         spin_unlock(&card->local_addrs6_lock);
 722 }
 723
 724 static void qeth_del_local_addrs4(struct qeth_card *card,
 725                                   struct qeth_ipacmd_local_addrs4 *cmd)
 726 {
 727         unsigned int i;
 728
 729         if (cmd->addr_length !=
 730             sizeof_field(struct qeth_ipacmd_local_addr4, addr)) {
 731                 dev_err_ratelimited(&card->gdev->dev,
 732                                     "Dropped IPv4 DEL LOCAL ADDR event with bad length %u\n",
 733                                     cmd->addr_length);
 734                 return;
 735         }
 736
 737         spin_lock(&card->local_addrs4_lock);
 738         for (i = 0; i < cmd->count; i++) {
 739                 struct qeth_ipacmd_local_addr4 *addr = &cmd->addrs[i];
 740                 unsigned int key = ipv4_addr_hash(addr->addr);
 741                 struct qeth_local_addr *tmp;
 742
 743                 hash_for_each_possible(card->local_addrs4, tmp, hnode, key) {
 744                         if (tmp->addr.s6_addr32[3] == addr->addr) {
 745                                 hash_del_rcu(&tmp->hnode);
 746                                 kfree_rcu(tmp, rcu);
 747                                 break;
 748                         }
 749                 }
 750         }
 751         spin_unlock(&card->local_addrs4_lock);
 752 }
 753
 754 static void qeth_del_local_addrs6(struct qeth_card *card,
 755                                   struct qeth_ipacmd_local_addrs6 *cmd)
 756 {
 757         unsigned int i;
 758
 759         if (cmd->addr_length !=
 760             sizeof_field(struct qeth_ipacmd_local_addr6, addr)) {
 761                 dev_err_ratelimited(&card->gdev->dev,
 762                                     "Dropped IPv6 DEL LOCAL ADDR event with bad length %u\n",
 763                                     cmd->addr_length);
 764                 return;
 765         }
 766
 767         spin_lock(&card->local_addrs6_lock);
 768         for (i = 0; i < cmd->count; i++) {
 769                 struct qeth_ipacmd_local_addr6 *addr = &cmd->addrs[i];
 770                 u32 key = ipv6_addr_hash(&addr->addr);
 771                 struct qeth_local_addr *tmp;
 772
 773                 hash_for_each_possible(card->local_addrs6, tmp, hnode, key) {
 774                         if (ipv6_addr_equal(&tmp->addr, &addr->addr)) {
 775                                 hash_del_rcu(&tmp->hnode);
 776                                 kfree_rcu(tmp, rcu);
 777                                 break;
 778                         }
 779                 }
 780         }
 781         spin_unlock(&card->local_addrs6_lock);
 782 }
 783
 784 static bool qeth_next_hop_is_local_v4(struct qeth_card *card,
 785                                       struct sk_buff *skb)
 786 {
 787         struct qeth_local_addr *tmp;
 788         bool is_local = false;
 789         unsigned int key;
 790         __be32 next_hop;
 791
 792         if (hash_empty(card->local_addrs4))
 793                 return false;
 794
 795         rcu_read_lock();
 796         next_hop = qeth_next_hop_v4_rcu(skb, qeth_dst_check_rcu(skb, 4));
 797         key = ipv4_addr_hash(next_hop);
 798
 799         hash_for_each_possible_rcu(card->local_addrs4, tmp, hnode, key) {
 800                 if (tmp->addr.s6_addr32[3] == next_hop) {
 801                         is_local = true;
 802                         break;
 803                 }
 804         }
 805         rcu_read_unlock();
 806
 807         return is_local;
 808 }
 809
 810 static bool qeth_next_hop_is_local_v6(struct qeth_card *card,
 811                                       struct sk_buff *skb)
 812 {
 813         struct qeth_local_addr *tmp;
 814         struct in6_addr *next_hop;
 815         bool is_local = false;
 816         u32 key;
 817
 818         if (hash_empty(card->local_addrs6))
 819                 return false;
 820
 821         rcu_read_lock();
 822         next_hop = qeth_next_hop_v6_rcu(skb, qeth_dst_check_rcu(skb, 6));
 823         key = ipv6_addr_hash(next_hop);
 824
 825         hash_for_each_possible_rcu(card->local_addrs6, tmp, hnode, key) {
 826                 if (ipv6_addr_equal(&tmp->addr, next_hop)) {
 827                         is_local = true;
 828                         break;
 829                 }
 830         }
 831         rcu_read_unlock();
 832
 833         return is_local;
 834 }
 835
 836 static int qeth_debugfs_local_addr_show(struct seq_file *m, void *v)
 837 {
 838         struct qeth_card *card = m->private;
 839         struct qeth_local_addr *tmp;
 840         unsigned int i;
 841
 842         rcu_read_lock();
 843         hash_for_each_rcu(card->local_addrs4, i, tmp, hnode)
 844                 seq_printf(m, "%pI4\n", &tmp->addr.s6_addr32[3]);
 845         hash_for_each_rcu(card->local_addrs6, i, tmp, hnode)
 846                 seq_printf(m, "%pI6c\n", &tmp->addr);
 847         rcu_read_unlock();
 848
 849         return 0;
 850 }
 851
 852 DEFINE_SHOW_ATTRIBUTE(qeth_debugfs_local_addr);
 853
 854 static void qeth_issue_ipa_msg(struct qeth_ipa_cmd *cmd, int rc,
 855                 struct qeth_card *card)
 856 {
 857         const char *ipa_name;
 858         int com = cmd->hdr.command;
 859
 860         ipa_name = qeth_get_ipa_cmd_name(com);
 861
 862         if (rc)
 863                 QETH_DBF_MESSAGE(2, "IPA: %s(%#x) for device %x returned %#x \"%s\"\n",
 864                                  ipa_name, com, CARD_DEVID(card), rc,
 865                                  qeth_get_ipa_msg(rc));
 866         else
 867                 QETH_DBF_MESSAGE(5, "IPA: %s(%#x) for device %x succeeded\n",
 868                                  ipa_name, com, CARD_DEVID(card));
 869 }
 870
 871 static struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card,
 872                                                 struct qeth_ipa_cmd *cmd)
 873 {
 874         QETH_CARD_TEXT(card, 5, "chkipad");
 875
 876         if (IS_IPA_REPLY(cmd)) {
 877                 if (cmd->hdr.command != IPA_CMD_SETCCID &&
 878                     cmd->hdr.command != IPA_CMD_DELCCID &&
 879                     cmd->hdr.command != IPA_CMD_MODCCID &&
 880                     cmd->hdr.command != IPA_CMD_SET_DIAG_ASS)
 881                         qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
 882                 return cmd;
 883         }
 884
 885         /* handle unsolicited event: */
 886         switch (cmd->hdr.command) {
 887         case IPA_CMD_STOPLAN:
 888                 if (cmd->hdr.return_code == IPA_RC_VEPA_TO_VEB_TRANSITION) {
 889                         dev_err(&card->gdev->dev,
 890                                 "Interface %s is down because the adjacent port is no longer in reflective relay mode\n",
 891                                 netdev_name(card->dev));
 892                         schedule_work(&card->close_dev_work);
 893                 } else {
 894                         dev_warn(&card->gdev->dev,
 895                                  "The link for interface %s on CHPID 0x%X failed\n",
 896                                  netdev_name(card->dev), card->info.chpid);
 897                         qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
 898                         netif_carrier_off(card->dev);
 899                 }
 900                 return NULL;
 901         case IPA_CMD_STARTLAN:
 902                 dev_info(&card->gdev->dev,
 903                          "The link for %s on CHPID 0x%X has been restored\n",
 904                          netdev_name(card->dev), card->info.chpid);
 905                 if (card->info.hwtrap)
 906                         card->info.hwtrap = 2;
 907                 qeth_schedule_recovery(card);
 908                 return NULL;
 909         case IPA_CMD_SETBRIDGEPORT_IQD:
 910         case IPA_CMD_SETBRIDGEPORT_OSA:
 911         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
 912                 if (card->discipline->control_event_handler(card, cmd))
 913                         return cmd;
 914                 return NULL;
 915         case IPA_CMD_MODCCID:
 916                 return cmd;
 917         case IPA_CMD_REGISTER_LOCAL_ADDR:
 918                 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
 919                         qeth_add_local_addrs4(card, &cmd->data.local_addrs4);
 920                 else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
 921                         qeth_add_local_addrs6(card, &cmd->data.local_addrs6);
 922
 923                 QETH_CARD_TEXT(card, 3, "irla");
 924                 return NULL;
 925         case IPA_CMD_UNREGISTER_LOCAL_ADDR:
 926                 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
 927                         qeth_del_local_addrs4(card, &cmd->data.local_addrs4);
 928                 else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
 929                         qeth_del_local_addrs6(card, &cmd->data.local_addrs6);
 930
 931                 QETH_CARD_TEXT(card, 3, "urla");
 932                 return NULL;
 933         default:
 934                 QETH_DBF_MESSAGE(2, "Received data is IPA but not a reply!\n");
 935                 return cmd;
 936         }
 937 }
 938
 939 static void qeth_clear_ipacmd_list(struct qeth_card *card)
 940 {
 941         struct qeth_cmd_buffer *iob;
 942         unsigned long flags;
 943
 944         QETH_CARD_TEXT(card, 4, "clipalst");
 945
 946         spin_lock_irqsave(&card->lock, flags);
 947         list_for_each_entry(iob, &card->cmd_waiter_list, list)
 948                 qeth_notify_cmd(iob, -ECANCELED);
 949         spin_unlock_irqrestore(&card->lock, flags);
 950 }
 951
 952 static int qeth_check_idx_response(struct qeth_card *card,
 953         unsigned char *buffer)
 954 {
 955         QETH_DBF_HEX(CTRL, 2, buffer, QETH_DBF_CTRL_LEN);
 956         if ((buffer[2] & QETH_IDX_TERMINATE_MASK) == QETH_IDX_TERMINATE) {
 957                 QETH_DBF_MESSAGE(2, "received an IDX TERMINATE with cause code %#04x\n",
 958                                  buffer[4]);
 959                 QETH_CARD_TEXT(card, 2, "ckidxres");
 960                 QETH_CARD_TEXT(card, 2, " idxterm");
 961                 QETH_CARD_TEXT_(card, 2, "rc%x", buffer[4]);
 962                 if (buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT ||
 963                     buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT_VM) {
 964                         dev_err(&card->gdev->dev,
 965                                 "The device does not support the configured transport mode\n");
 966                         return -EPROTONOSUPPORT;
 967                 }
 968                 return -EIO;
 969         }
 970         return 0;
 971 }
 972
 973 void qeth_put_cmd(struct qeth_cmd_buffer *iob)
 974 {
 975         if (refcount_dec_and_test(&iob->ref_count)) {
 976                 kfree(iob->data);
 977                 kfree(iob);
 978         }
 979 }
 980 EXPORT_SYMBOL_GPL(qeth_put_cmd);
 981
 982 static void qeth_release_buffer_cb(struct qeth_card *card,
 983                                    struct qeth_cmd_buffer *iob,
 984                                    unsigned int data_length)
 985 {
 986         qeth_put_cmd(iob);
 987 }
 988
 989 static void qeth_cancel_cmd(struct qeth_cmd_buffer *iob, int rc)
 990 {
 991         qeth_notify_cmd(iob, rc);
 992         qeth_put_cmd(iob);
 993 }
 994
 995 struct qeth_cmd_buffer *qeth_alloc_cmd(struct qeth_channel *channel,
 996                                        unsigned int length, unsigned int ccws,
 997                                        long timeout)
 998 {
 999         struct qeth_cmd_buffer *iob;
1000
1001         if (length > QETH_BUFSIZE)
1002                 return NULL;
1003
1004         iob = kzalloc(sizeof(*iob), GFP_KERNEL);
1005         if (!iob)
1006                 return NULL;
1007
1008         iob->data = kzalloc(ALIGN(length, 8) + ccws * sizeof(struct ccw1),
1009                             GFP_KERNEL | GFP_DMA);
1010         if (!iob->data) {
1011                 kfree(iob);
1012                 return NULL;
1013         }
1014
1015         init_completion(&iob->done);
1016         spin_lock_init(&iob->lock);
1017         INIT_LIST_HEAD(&iob->list);
1018         refcount_set(&iob->ref_count, 1);
1019         iob->channel = channel;
1020         iob->timeout = timeout;
1021         iob->length = length;
1022         return iob;
1023 }
1024 EXPORT_SYMBOL_GPL(qeth_alloc_cmd);
1025
1026 static void qeth_issue_next_read_cb(struct qeth_card *card,
1027                                     struct qeth_cmd_buffer *iob,
1028                                     unsigned int data_length)
1029 {
1030         struct qeth_cmd_buffer *request = NULL;
1031         struct qeth_ipa_cmd *cmd = NULL;
1032         struct qeth_reply *reply = NULL;
1033         struct qeth_cmd_buffer *tmp;
1034         unsigned long flags;
1035         int rc = 0;
1036
1037         QETH_CARD_TEXT(card, 4, "sndctlcb");
1038         rc = qeth_check_idx_response(card, iob->data);
1039         switch (rc) {
1040         case 0:
1041                 break;
1042         case -EIO:
1043                 qeth_schedule_recovery(card);
1044                 fallthrough;
1045         default:
1046                 qeth_clear_ipacmd_list(card);
1047                 goto err_idx;
1048         }
1049
1050         cmd = __ipa_reply(iob);
1051         if (cmd) {
1052                 cmd = qeth_check_ipa_data(card, cmd);
1053                 if (!cmd)
1054                         goto out;
1055                 if (IS_OSN(card) && card->osn_info.assist_cb &&
1056                     cmd->hdr.command != IPA_CMD_STARTLAN) {
1057                         card->osn_info.assist_cb(card->dev, cmd);
1058                         goto out;
1059                 }
1060         }
1061
1062         /* match against pending cmd requests */
1063         spin_lock_irqsave(&card->lock, flags);
1064         list_for_each_entry(tmp, &card->cmd_waiter_list, list) {
1065                 if (tmp->match && tmp->match(tmp, iob)) {
1066                         request = tmp;
1067                         /* take the object outside the lock */
1068                         qeth_get_cmd(request);
1069                         break;
1070                 }
1071         }
1072         spin_unlock_irqrestore(&card->lock, flags);
1073
1074         if (!request)
1075                 goto out;
1076
1077         reply = &request->reply;
1078         if (!reply->callback) {
1079                 rc = 0;
1080                 goto no_callback;
1081         }
1082
1083         spin_lock_irqsave(&request->lock, flags);
1084         if (request->rc)
1085                 /* Bail out when the requestor has already left: */
1086                 rc = request->rc;
1087         else
1088                 rc = reply->callback(card, reply, cmd ? (unsigned long)cmd :
1089                                                         (unsigned long)iob);
1090         spin_unlock_irqrestore(&request->lock, flags);
1091
1092 no_callback:
1093         if (rc <= 0)
1094                 qeth_notify_cmd(request, rc);
1095         qeth_put_cmd(request);
1096 out:
1097         memcpy(&card->seqno.pdu_hdr_ack,
1098                 QETH_PDU_HEADER_SEQ_NO(iob->data),
1099                 QETH_SEQ_NO_LENGTH);
1100         __qeth_issue_next_read(card);
1101 err_idx:
1102         qeth_put_cmd(iob);
1103 }
1104
1105 static int qeth_set_thread_start_bit(struct qeth_card *card,
1106                 unsigned long thread)
1107 {
1108         unsigned long flags;
1109         int rc = 0;
1110
1111         spin_lock_irqsave(&card->thread_mask_lock, flags);
1112         if (!(card->thread_allowed_mask & thread))
1113                 rc = -EPERM;
1114         else if (card->thread_start_mask & thread)
1115                 rc = -EBUSY;
1116         else
1117                 card->thread_start_mask |= thread;
1118         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1119
1120         return rc;
1121 }
1122
1123 static void qeth_clear_thread_start_bit(struct qeth_card *card,
1124                                         unsigned long thread)
1125 {
1126         unsigned long flags;
1127
1128         spin_lock_irqsave(&card->thread_mask_lock, flags);
1129         card->thread_start_mask &= ~thread;
1130         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1131         wake_up(&card->wait_q);
1132 }
1133
1134 static void qeth_clear_thread_running_bit(struct qeth_card *card,
1135                                           unsigned long thread)
1136 {
1137         unsigned long flags;
1138
1139         spin_lock_irqsave(&card->thread_mask_lock, flags);
1140         card->thread_running_mask &= ~thread;
1141         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1142         wake_up_all(&card->wait_q);
1143 }
1144
1145 static int __qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
1146 {
1147         unsigned long flags;
1148         int rc = 0;
1149
1150         spin_lock_irqsave(&card->thread_mask_lock, flags);
1151         if (card->thread_start_mask & thread) {
1152                 if ((card->thread_allowed_mask & thread) &&
1153                     !(card->thread_running_mask & thread)) {
1154                         rc = 1;
1155                         card->thread_start_mask &= ~thread;
1156                         card->thread_running_mask |= thread;
1157                 } else
1158                         rc = -EPERM;
1159         }
1160         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1161         return rc;
1162 }
1163
1164 static int qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
1165 {
1166         int rc = 0;
1167
1168         wait_event(card->wait_q,
1169                    (rc = __qeth_do_run_thread(card, thread)) >= 0);
1170         return rc;
1171 }
1172
1173 int qeth_schedule_recovery(struct qeth_card *card)
1174 {
1175         int rc;
1176
1177         QETH_CARD_TEXT(card, 2, "startrec");
1178
1179         rc = qeth_set_thread_start_bit(card, QETH_RECOVER_THREAD);
1180         if (!rc)
1181                 schedule_work(&card->kernel_thread_starter);
1182
1183         return rc;
1184 }
1185
1186 static int qeth_get_problem(struct qeth_card *card, struct ccw_device *cdev,
1187                             struct irb *irb)
1188 {
1189         int dstat, cstat;
1190         char *sense;
1191
1192         sense = (char *) irb->ecw;
1193         cstat = irb->scsw.cmd.cstat;
1194         dstat = irb->scsw.cmd.dstat;
1195
1196         if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK |
1197                      SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK |
1198                      SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) {
1199                 QETH_CARD_TEXT(card, 2, "CGENCHK");
1200                 dev_warn(&cdev->dev, "The qeth device driver "
1201                         "failed to recover an error on the device\n");
1202                 QETH_DBF_MESSAGE(2, "check on channel %x with dstat=%#x, cstat=%#x\n",
1203                                  CCW_DEVID(cdev), dstat, cstat);
1204                 print_hex_dump(KERN_WARNING, "qeth: irb ", DUMP_PREFIX_OFFSET,
1205                                 16, 1, irb, 64, 1);
1206                 return -EIO;
1207         }
1208
1209         if (dstat & DEV_STAT_UNIT_CHECK) {
1210                 if (sense[SENSE_RESETTING_EVENT_BYTE] &
1211                     SENSE_RESETTING_EVENT_FLAG) {
1212                         QETH_CARD_TEXT(card, 2, "REVIND");
1213                         return -EIO;
1214                 }
1215                 if (sense[SENSE_COMMAND_REJECT_BYTE] &
1216                     SENSE_COMMAND_REJECT_FLAG) {
1217                         QETH_CARD_TEXT(card, 2, "CMDREJi");
1218                         return -EIO;
1219                 }
1220                 if ((sense[2] == 0xaf) && (sense[3] == 0xfe)) {
1221                         QETH_CARD_TEXT(card, 2, "AFFE");
1222                         return -EIO;
1223                 }
1224                 if ((!sense[0]) && (!sense[1]) && (!sense[2]) && (!sense[3])) {
1225                         QETH_CARD_TEXT(card, 2, "ZEROSEN");
1226                         return 0;
1227                 }
1228                 QETH_CARD_TEXT(card, 2, "DGENCHK");
1229                 return -EIO;
1230         }
1231         return 0;
1232 }
1233
1234 static int qeth_check_irb_error(struct qeth_card *card, struct ccw_device *cdev,
1235                                 struct irb *irb)
1236 {
1237         if (!IS_ERR(irb))
1238                 return 0;
1239
1240         switch (PTR_ERR(irb)) {
1241         case -EIO:
1242                 QETH_DBF_MESSAGE(2, "i/o-error on channel %x\n",
1243                                  CCW_DEVID(cdev));
1244                 QETH_CARD_TEXT(card, 2, "ckirberr");
1245                 QETH_CARD_TEXT_(card, 2, "  rc%d", -EIO);
1246                 return -EIO;
1247         case -ETIMEDOUT:
1248                 dev_warn(&cdev->dev, "A hardware operation timed out"
1249                         " on the device\n");
1250                 QETH_CARD_TEXT(card, 2, "ckirberr");
1251                 QETH_CARD_TEXT_(card, 2, "  rc%d", -ETIMEDOUT);
1252                 return -ETIMEDOUT;
1253         default:
1254                 QETH_DBF_MESSAGE(2, "unknown error %ld on channel %x\n",
1255                                  PTR_ERR(irb), CCW_DEVID(cdev));
1256                 QETH_CARD_TEXT(card, 2, "ckirberr");
1257                 QETH_CARD_TEXT(card, 2, "  rc???");
1258                 return PTR_ERR(irb);
1259         }
1260 }
1261
1262 static void qeth_irq(struct ccw_device *cdev, unsigned long intparm,
1263                 struct irb *irb)
1264 {
1265         int rc;
1266         int cstat, dstat;
1267         struct qeth_cmd_buffer *iob = NULL;
1268         struct ccwgroup_device *gdev;
1269         struct qeth_channel *channel;
1270         struct qeth_card *card;
1271
1272         /* while we hold the ccwdev lock, this stays valid: */
1273         gdev = dev_get_drvdata(&cdev->dev);
1274         card = dev_get_drvdata(&gdev->dev);
1275
1276         QETH_CARD_TEXT(card, 5, "irq");
1277
1278         if (card->read.ccwdev == cdev) {
1279                 channel = &card->read;
1280                 QETH_CARD_TEXT(card, 5, "read");
1281         } else if (card->write.ccwdev == cdev) {
1282                 channel = &card->write;
1283                 QETH_CARD_TEXT(card, 5, "write");
1284         } else {
1285                 channel = &card->data;
1286                 QETH_CARD_TEXT(card, 5, "data");
1287         }
1288
1289         if (intparm == 0) {
1290                 QETH_CARD_TEXT(card, 5, "irqunsol");
1291         } else if ((addr_t)intparm != (addr_t)channel->active_cmd) {
1292                 QETH_CARD_TEXT(card, 5, "irqunexp");
1293
1294                 dev_err(&cdev->dev,
1295                         "Received IRQ with intparm %lx, expected %px\n",
1296                         intparm, channel->active_cmd);
1297                 if (channel->active_cmd)
1298                         qeth_cancel_cmd(channel->active_cmd, -EIO);
1299         } else {
1300                 iob = (struct qeth_cmd_buffer *) (addr_t)intparm;
1301         }
1302
1303         channel->active_cmd = NULL;
1304         qeth_unlock_channel(card, channel);
1305
1306         rc = qeth_check_irb_error(card, cdev, irb);
1307         if (rc) {
1308                 /* IO was terminated, free its resources. */
1309                 if (iob)
1310                         qeth_cancel_cmd(iob, rc);
1311                 return;
1312         }
1313
1314         if (irb->scsw.cmd.fctl & SCSW_FCTL_CLEAR_FUNC) {
1315                 channel->state = CH_STATE_STOPPED;
1316                 wake_up(&card->wait_q);
1317         }
1318
1319         if (irb->scsw.cmd.fctl & SCSW_FCTL_HALT_FUNC) {
1320                 channel->state = CH_STATE_HALTED;
1321                 wake_up(&card->wait_q);
1322         }
1323
1324         if (iob && (irb->scsw.cmd.fctl & (SCSW_FCTL_CLEAR_FUNC |
1325                                           SCSW_FCTL_HALT_FUNC))) {
1326                 qeth_cancel_cmd(iob, -ECANCELED);
1327                 iob = NULL;
1328         }
1329
1330         cstat = irb->scsw.cmd.cstat;
1331         dstat = irb->scsw.cmd.dstat;
1332
1333         if ((dstat & DEV_STAT_UNIT_EXCEP) ||
1334             (dstat & DEV_STAT_UNIT_CHECK) ||
1335             (cstat)) {
1336                 if (irb->esw.esw0.erw.cons) {
1337                         dev_warn(&channel->ccwdev->dev,
1338                                 "The qeth device driver failed to recover "
1339                                 "an error on the device\n");
1340                         QETH_DBF_MESSAGE(2, "sense data available on channel %x: cstat %#X dstat %#X\n",
1341                                          CCW_DEVID(channel->ccwdev), cstat,
1342                                          dstat);
1343                         print_hex_dump(KERN_WARNING, "qeth: irb ",
1344                                 DUMP_PREFIX_OFFSET, 16, 1, irb, 32, 1);
1345                         print_hex_dump(KERN_WARNING, "qeth: sense data ",
1346                                 DUMP_PREFIX_OFFSET, 16, 1, irb->ecw, 32, 1);
1347                 }
1348
1349                 rc = qeth_get_problem(card, cdev, irb);
1350                 if (rc) {
1351                         card->read_or_write_problem = 1;
1352                         if (iob)
1353                                 qeth_cancel_cmd(iob, rc);
1354                         qeth_clear_ipacmd_list(card);
1355                         qeth_schedule_recovery(card);
1356                         return;
1357                 }
1358         }
1359
1360         if (iob) {
1361                 /* sanity check: */
1362                 if (irb->scsw.cmd.count > iob->length) {
1363                         qeth_cancel_cmd(iob, -EIO);
1364                         return;
1365                 }
1366                 if (iob->callback)
1367                         iob->callback(card, iob,
1368                                       iob->length - irb->scsw.cmd.count);
1369         }
1370 }
1371
1372 static void qeth_notify_skbs(struct qeth_qdio_out_q *q,
1373                 struct qeth_qdio_out_buffer *buf,
1374                 enum iucv_tx_notify notification)
1375 {
1376         struct sk_buff *skb;
1377
1378         skb_queue_walk(&buf->skb_list, skb) {
1379                 QETH_CARD_TEXT_(q->card, 5, "skbn%d", notification);
1380                 QETH_CARD_TEXT_(q->card, 5, "%lx", (long) skb);
1381                 if (skb->sk && skb->sk->sk_family == PF_IUCV)
1382                         iucv_sk(skb->sk)->sk_txnotify(skb, notification);
1383         }
1384 }
1385
1386 static void qeth_tx_complete_buf(struct qeth_qdio_out_buffer *buf, bool error,
1387                                  int budget)
1388 {
1389         struct qeth_qdio_out_q *queue = buf->q;
1390         struct sk_buff *skb;
1391
1392         /* Empty buffer? */
1393         if (buf->next_element_to_fill == 0)
1394                 return;
1395
1396         QETH_TXQ_STAT_INC(queue, bufs);
1397         QETH_TXQ_STAT_ADD(queue, buf_elements, buf->next_element_to_fill);
1398         if (error) {
1399                 QETH_TXQ_STAT_ADD(queue, tx_errors, buf->frames);
1400         } else {
1401                 QETH_TXQ_STAT_ADD(queue, tx_packets, buf->frames);
1402                 QETH_TXQ_STAT_ADD(queue, tx_bytes, buf->bytes);
1403         }
1404
1405         while ((skb = __skb_dequeue(&buf->skb_list)) != NULL) {
1406                 unsigned int bytes = qdisc_pkt_len(skb);
1407                 bool is_tso = skb_is_gso(skb);
1408                 unsigned int packets;
1409
1410                 packets = is_tso ? skb_shinfo(skb)->gso_segs : 1;
1411                 if (!error) {
1412                         if (skb->ip_summed == CHECKSUM_PARTIAL)
1413                                 QETH_TXQ_STAT_ADD(queue, skbs_csum, packets);
1414                         if (skb_is_nonlinear(skb))
1415                                 QETH_TXQ_STAT_INC(queue, skbs_sg);
1416                         if (is_tso) {
1417                                 QETH_TXQ_STAT_INC(queue, skbs_tso);
1418                                 QETH_TXQ_STAT_ADD(queue, tso_bytes, bytes);
1419                         }
1420                 }
1421
1422                 napi_consume_skb(skb, budget);
1423         }
1424 }
1425
1426 static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
1427                                      struct qeth_qdio_out_buffer *buf,
1428                                      bool error, int budget)
1429 {
1430         int i;
1431
1432         /* is PCI flag set on buffer? */
1433         if (buf->buffer->element[0].sflags & SBAL_SFLAGS0_PCI_REQ)
1434                 atomic_dec(&queue->set_pci_flags_count);
1435
1436         qeth_tx_complete_buf(buf, error, budget);
1437
1438         for (i = 0; i < queue->max_elements; ++i) {
1439                 void *data = phys_to_virt(buf->buffer->element[i].addr);
1440
1441                 if (data && buf->is_header[i])
1442                         kmem_cache_free(qeth_core_header_cache, data);
1443                 buf->is_header[i] = 0;
1444         }
1445
1446         qeth_scrub_qdio_buffer(buf->buffer, queue->max_elements);
1447         buf->next_element_to_fill = 0;
1448         buf->frames = 0;
1449         buf->bytes = 0;
1450         atomic_set(&buf->state, QETH_QDIO_BUF_EMPTY);
1451 }
1452
1453 static void qeth_tx_complete_pending_bufs(struct qeth_card *card,
1454                                           struct qeth_qdio_out_q *queue,
1455                                           bool drain)
1456 {
1457         struct qeth_qdio_out_buffer *buf, *tmp;
1458
1459         list_for_each_entry_safe(buf, tmp, &queue->pending_bufs, list_entry) {
1460                 if (drain || atomic_read(&buf->state) == QETH_QDIO_BUF_EMPTY) {
1461                         QETH_CARD_TEXT(card, 5, "fp");
1462                         QETH_CARD_TEXT_(card, 5, "%lx", (long) buf);
1463
1464                         if (drain)
1465                                 qeth_notify_skbs(queue, buf,
1466                                                  TX_NOTIFY_GENERALERROR);
1467                         qeth_tx_complete_buf(buf, drain, 0);
1468
1469                         list_del(&buf->list_entry);
1470                         kmem_cache_free(qeth_qdio_outbuf_cache, buf);
1471                 }
1472         }
1473 }
1474
1475 static void qeth_drain_output_queue(struct qeth_qdio_out_q *q, bool free)
1476 {
1477         int j;
1478
1479         qeth_tx_complete_pending_bufs(q->card, q, true);
1480
1481         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
1482                 if (!q->bufs[j])
1483                         continue;
1484
1485                 qeth_clear_output_buffer(q, q->bufs[j], true, 0);
1486                 if (free) {
1487                         kmem_cache_free(qeth_qdio_outbuf_cache, q->bufs[j]);
1488                         q->bufs[j] = NULL;
1489                 }
1490         }
1491 }
1492
1493 static void qeth_drain_output_queues(struct qeth_card *card)
1494 {
1495         int i;
1496
1497         QETH_CARD_TEXT(card, 2, "clearqdbf");
1498         /* clear outbound buffers to free skbs */
1499         for (i = 0; i < card->qdio.no_out_queues; ++i) {
1500                 if (card->qdio.out_qs[i])
1501                         qeth_drain_output_queue(card->qdio.out_qs[i], false);
1502         }
1503 }
1504
1505 static void qeth_osa_set_output_queues(struct qeth_card *card, bool single)
1506 {
1507         unsigned int max = single ? 1 : card->dev->num_tx_queues;
1508
1509         if (card->qdio.no_out_queues == max)
1510                 return;
1511
1512         if (atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED)
1513                 qeth_free_qdio_queues(card);
1514
1515         if (max == 1 && card->qdio.do_prio_queueing != QETH_PRIOQ_DEFAULT)
1516                 dev_info(&card->gdev->dev, "Priority Queueing not supported\n");
1517
1518         card->qdio.no_out_queues = max;
1519 }
1520
1521 static int qeth_update_from_chp_desc(struct qeth_card *card)
1522 {
1523         struct ccw_device *ccwdev;
1524         struct channel_path_desc_fmt0 *chp_dsc;
1525
1526         QETH_CARD_TEXT(card, 2, "chp_desc");
1527
1528         ccwdev = card->data.ccwdev;
1529         chp_dsc = ccw_device_get_chp_desc(ccwdev, 0);
1530         if (!chp_dsc)
1531                 return -ENOMEM;
1532
1533         card->info.func_level = 0x4100 + chp_dsc->desc;
1534
1535         if (IS_OSD(card) || IS_OSX(card))
1536                 /* CHPP field bit 6 == 1 -> single queue */
1537                 qeth_osa_set_output_queues(card, chp_dsc->chpp & 0x02);
1538
1539         kfree(chp_dsc);
1540         QETH_CARD_TEXT_(card, 2, "nr:%x", card->qdio.no_out_queues);
1541         QETH_CARD_TEXT_(card, 2, "lvl:%02x", card->info.func_level);
1542         return 0;
1543 }
1544
1545 static void qeth_init_qdio_info(struct qeth_card *card)
1546 {
1547         QETH_CARD_TEXT(card, 4, "intqdinf");
1548         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
1549         card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT;
1550         card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
1551
1552         /* inbound */
1553         card->qdio.no_in_queues = 1;
1554         card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
1555         if (IS_IQD(card))
1556                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_HSDEFAULT;
1557         else
1558                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_DEFAULT;
1559         card->qdio.in_buf_pool.buf_count = card->qdio.init_pool.buf_count;
1560         INIT_LIST_HEAD(&card->qdio.in_buf_pool.entry_list);
1561         INIT_LIST_HEAD(&card->qdio.init_pool.entry_list);
1562 }
1563
1564 static void qeth_set_initial_options(struct qeth_card *card)
1565 {
1566         card->options.route4.type = NO_ROUTER;
1567         card->options.route6.type = NO_ROUTER;
1568         card->options.isolation = ISOLATION_MODE_NONE;
1569         card->options.cq = QETH_CQ_DISABLED;
1570         card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
1571 }
1572
1573 static int qeth_do_start_thread(struct qeth_card *card, unsigned long thread)
1574 {
1575         unsigned long flags;
1576         int rc = 0;
1577
1578         spin_lock_irqsave(&card->thread_mask_lock, flags);
1579         QETH_CARD_TEXT_(card, 4, "  %02x%02x%02x",
1580                         (u8) card->thread_start_mask,
1581                         (u8) card->thread_allowed_mask,
1582                         (u8) card->thread_running_mask);
1583         rc = (card->thread_start_mask & thread);
1584         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1585         return rc;
1586 }
1587
1588 static int qeth_do_reset(void *data);
1589 static void qeth_start_kernel_thread(struct work_struct *work)
1590 {
1591         struct task_struct *ts;
1592         struct qeth_card *card = container_of(work, struct qeth_card,
1593                                         kernel_thread_starter);
1594         QETH_CARD_TEXT(card, 2, "strthrd");
1595
1596         if (card->read.state != CH_STATE_UP &&
1597             card->write.state != CH_STATE_UP)
1598                 return;
1599         if (qeth_do_start_thread(card, QETH_RECOVER_THREAD)) {
1600                 ts = kthread_run(qeth_do_reset, card, "qeth_recover");
1601                 if (IS_ERR(ts)) {
1602                         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1603                         qeth_clear_thread_running_bit(card,
1604                                 QETH_RECOVER_THREAD);
1605                 }
1606         }
1607 }
1608
1609 static void qeth_buffer_reclaim_work(struct work_struct *);
1610 static void qeth_setup_card(struct qeth_card *card)
1611 {
1612         QETH_CARD_TEXT(card, 2, "setupcrd");
1613
1614         card->info.type = CARD_RDEV(card)->id.driver_info;
1615         card->state = CARD_STATE_DOWN;
1616         spin_lock_init(&card->lock);
1617         spin_lock_init(&card->thread_mask_lock);
1618         mutex_init(&card->conf_mutex);
1619         mutex_init(&card->discipline_mutex);
1620         INIT_WORK(&card->kernel_thread_starter, qeth_start_kernel_thread);
1621         INIT_LIST_HEAD(&card->cmd_waiter_list);
1622         init_waitqueue_head(&card->wait_q);
1623         qeth_set_initial_options(card);
1624         /* IP address takeover */
1625         INIT_LIST_HEAD(&card->ipato.entries);
1626         qeth_init_qdio_info(card);
1627         INIT_DELAYED_WORK(&card->buffer_reclaim_work, qeth_buffer_reclaim_work);
1628         INIT_WORK(&card->close_dev_work, qeth_close_dev_handler);
1629         hash_init(card->rx_mode_addrs);
1630         hash_init(card->local_addrs4);
1631         hash_init(card->local_addrs6);
1632         spin_lock_init(&card->local_addrs4_lock);
1633         spin_lock_init(&card->local_addrs6_lock);
1634 }
1635
1636 static void qeth_core_sl_print(struct seq_file *m, struct service_level *slr)
1637 {
1638         struct qeth_card *card = container_of(slr, struct qeth_card,
1639                                         qeth_service_level);
1640         if (card->info.mcl_level[0])
1641                 seq_printf(m, "qeth: %s firmware level %s\n",
1642                         CARD_BUS_ID(card), card->info.mcl_level);
1643 }
1644
1645 static struct qeth_card *qeth_alloc_card(struct ccwgroup_device *gdev)
1646 {
1647         struct qeth_card *card;
1648
1649         QETH_DBF_TEXT(SETUP, 2, "alloccrd");
1650         card = kzalloc(sizeof(*card), GFP_KERNEL);
1651         if (!card)
1652                 goto out;
1653         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1654
1655         card->gdev = gdev;
1656         dev_set_drvdata(&gdev->dev, card);
1657         CARD_RDEV(card) = gdev->cdev[0];
1658         CARD_WDEV(card) = gdev->cdev[1];
1659         CARD_DDEV(card) = gdev->cdev[2];
1660
1661         card->event_wq = alloc_ordered_workqueue("%s_event", 0,
1662                                                  dev_name(&gdev->dev));
1663         if (!card->event_wq)
1664                 goto out_wq;
1665
1666         card->read_cmd = qeth_alloc_cmd(&card->read, QETH_BUFSIZE, 1, 0);
1667         if (!card->read_cmd)
1668                 goto out_read_cmd;
1669
1670         card->debugfs = debugfs_create_dir(dev_name(&gdev->dev),
1671                                            qeth_debugfs_root);
1672         debugfs_create_file("local_addrs", 0400, card->debugfs, card,
1673                             &qeth_debugfs_local_addr_fops);
1674
1675         card->qeth_service_level.seq_print = qeth_core_sl_print;
1676         register_service_level(&card->qeth_service_level);
1677         return card;
1678
1679 out_read_cmd:
1680         destroy_workqueue(card->event_wq);
1681 out_wq:
1682         dev_set_drvdata(&gdev->dev, NULL);
1683         kfree(card);
1684 out:
1685         return NULL;
1686 }
1687
1688 static int qeth_clear_channel(struct qeth_card *card,
1689                               struct qeth_channel *channel)
1690 {
1691         int rc;
1692
1693         QETH_CARD_TEXT(card, 3, "clearch");
1694         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1695         rc = ccw_device_clear(channel->ccwdev, (addr_t)channel->active_cmd);
1696         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1697
1698         if (rc)
1699                 return rc;
1700         rc = wait_event_interruptible_timeout(card->wait_q,
1701                         channel->state == CH_STATE_STOPPED, QETH_TIMEOUT);
1702         if (rc == -ERESTARTSYS)
1703                 return rc;
1704         if (channel->state != CH_STATE_STOPPED)
1705                 return -ETIME;
1706         channel->state = CH_STATE_DOWN;
1707         return 0;
1708 }
1709
1710 static int qeth_halt_channel(struct qeth_card *card,
1711                              struct qeth_channel *channel)
1712 {
1713         int rc;
1714
1715         QETH_CARD_TEXT(card, 3, "haltch");
1716         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1717         rc = ccw_device_halt(channel->ccwdev, (addr_t)channel->active_cmd);
1718         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1719
1720         if (rc)
1721                 return rc;
1722         rc = wait_event_interruptible_timeout(card->wait_q,
1723                         channel->state == CH_STATE_HALTED, QETH_TIMEOUT);
1724         if (rc == -ERESTARTSYS)
1725                 return rc;
1726         if (channel->state != CH_STATE_HALTED)
1727                 return -ETIME;
1728         return 0;
1729 }
1730
1731 static int qeth_stop_channel(struct qeth_channel *channel)
1732 {
1733         struct ccw_device *cdev = channel->ccwdev;
1734         int rc;
1735
1736         rc = ccw_device_set_offline(cdev);
1737
1738         spin_lock_irq(get_ccwdev_lock(cdev));
1739         if (channel->active_cmd) {
1740                 dev_err(&cdev->dev, "Stopped channel while cmd %px was still active\n",
1741                         channel->active_cmd);
1742                 channel->active_cmd = NULL;
1743         }
1744         cdev->handler = NULL;
1745         spin_unlock_irq(get_ccwdev_lock(cdev));
1746
1747         return rc;
1748 }
1749
1750 static int qeth_start_channel(struct qeth_channel *channel)
1751 {
1752         struct ccw_device *cdev = channel->ccwdev;
1753         int rc;
1754
1755         channel->state = CH_STATE_DOWN;
1756         atomic_set(&channel->irq_pending, 0);
1757
1758         spin_lock_irq(get_ccwdev_lock(cdev));
1759         cdev->handler = qeth_irq;
1760         spin_unlock_irq(get_ccwdev_lock(cdev));
1761
1762         rc = ccw_device_set_online(cdev);
1763         if (rc)
1764                 goto err;
1765
1766         return 0;
1767
1768 err:
1769         spin_lock_irq(get_ccwdev_lock(cdev));
1770         cdev->handler = NULL;
1771         spin_unlock_irq(get_ccwdev_lock(cdev));
1772         return rc;
1773 }
1774
1775 static int qeth_halt_channels(struct qeth_card *card)
1776 {
1777         int rc1 = 0, rc2 = 0, rc3 = 0;
1778
1779         QETH_CARD_TEXT(card, 3, "haltchs");
1780         rc1 = qeth_halt_channel(card, &card->read);
1781         rc2 = qeth_halt_channel(card, &card->write);
1782         rc3 = qeth_halt_channel(card, &card->data);
1783         if (rc1)
1784                 return rc1;
1785         if (rc2)
1786                 return rc2;
1787         return rc3;
1788 }
1789
1790 static int qeth_clear_channels(struct qeth_card *card)
1791 {
1792         int rc1 = 0, rc2 = 0, rc3 = 0;
1793
1794         QETH_CARD_TEXT(card, 3, "clearchs");
1795         rc1 = qeth_clear_channel(card, &card->read);
1796         rc2 = qeth_clear_channel(card, &card->write);
1797         rc3 = qeth_clear_channel(card, &card->data);
1798         if (rc1)
1799                 return rc1;
1800         if (rc2)
1801                 return rc2;
1802         return rc3;
1803 }
1804
1805 static int qeth_clear_halt_card(struct qeth_card *card, int halt)
1806 {
1807         int rc = 0;
1808
1809         QETH_CARD_TEXT(card, 3, "clhacrd");
1810
1811         if (halt)
1812                 rc = qeth_halt_channels(card);
1813         if (rc)
1814                 return rc;
1815         return qeth_clear_channels(card);
1816 }
1817
1818 static int qeth_qdio_clear_card(struct qeth_card *card, int use_halt)
1819 {
1820         int rc = 0;
1821
1822         QETH_CARD_TEXT(card, 3, "qdioclr");
1823         switch (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ESTABLISHED,
1824                 QETH_QDIO_CLEANING)) {
1825         case QETH_QDIO_ESTABLISHED:
1826                 if (IS_IQD(card))
1827                         rc = qdio_shutdown(CARD_DDEV(card),
1828                                 QDIO_FLAG_CLEANUP_USING_HALT);
1829                 else
1830                         rc = qdio_shutdown(CARD_DDEV(card),
1831                                 QDIO_FLAG_CLEANUP_USING_CLEAR);
1832                 if (rc)
1833                         QETH_CARD_TEXT_(card, 3, "1err%d", rc);
1834                 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
1835                 break;
1836         case QETH_QDIO_CLEANING:
1837                 return rc;
1838         default:
1839                 break;
1840         }
1841         rc = qeth_clear_halt_card(card, use_halt);
1842         if (rc)
1843                 QETH_CARD_TEXT_(card, 3, "2err%d", rc);
1844         return rc;
1845 }
1846
1847 static enum qeth_discipline_id qeth_vm_detect_layer(struct qeth_card *card)
1848 {
1849         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1850         struct diag26c_vnic_resp *response = NULL;
1851         struct diag26c_vnic_req *request = NULL;
1852         struct ccw_dev_id id;
1853         char userid[80];
1854         int rc = 0;
1855
1856         QETH_CARD_TEXT(card, 2, "vmlayer");
1857
1858         cpcmd("QUERY USERID", userid, sizeof(userid), &rc);
1859         if (rc)
1860                 goto out;
1861
1862         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
1863         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
1864         if (!request || !response) {
1865                 rc = -ENOMEM;
1866                 goto out;
1867         }
1868
1869         ccw_device_get_id(CARD_RDEV(card), &id);
1870         request->resp_buf_len = sizeof(*response);
1871         request->resp_version = DIAG26C_VERSION6_VM65918;
1872         request->req_format = DIAG26C_VNIC_INFO;
1873         ASCEBC(userid, 8);
1874         memcpy(&request->sys_name, userid, 8);
1875         request->devno = id.devno;
1876
1877         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1878         rc = diag26c(request, response, DIAG26C_PORT_VNIC);
1879         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1880         if (rc)
1881                 goto out;
1882         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
1883
1884         if (request->resp_buf_len < sizeof(*response) ||
1885             response->version != request->resp_version) {
1886                 rc = -EIO;
1887                 goto out;
1888         }
1889
1890         if (response->protocol == VNIC_INFO_PROT_L2)
1891                 disc = QETH_DISCIPLINE_LAYER2;
1892         else if (response->protocol == VNIC_INFO_PROT_L3)
1893                 disc = QETH_DISCIPLINE_LAYER3;
1894
1895 out:
1896         kfree(response);
1897         kfree(request);
1898         if (rc)
1899                 QETH_CARD_TEXT_(card, 2, "err%x", rc);
1900         return disc;
1901 }
1902
1903 /* Determine whether the device requires a specific layer discipline */
1904 static enum qeth_discipline_id qeth_enforce_discipline(struct qeth_card *card)
1905 {
1906         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1907
1908         if (IS_OSM(card) || IS_OSN(card))
1909                 disc = QETH_DISCIPLINE_LAYER2;
1910         else if (IS_VM_NIC(card))
1911                 disc = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
1912                                       qeth_vm_detect_layer(card);
1913
1914         switch (disc) {
1915         case QETH_DISCIPLINE_LAYER2:
1916                 QETH_CARD_TEXT(card, 3, "force l2");
1917                 break;
1918         case QETH_DISCIPLINE_LAYER3:
1919                 QETH_CARD_TEXT(card, 3, "force l3");
1920                 break;
1921         default:
1922                 QETH_CARD_TEXT(card, 3, "force no");
1923         }
1924
1925         return disc;
1926 }
1927
1928 static void qeth_set_blkt_defaults(struct qeth_card *card)
1929 {
1930         QETH_CARD_TEXT(card, 2, "cfgblkt");
1931
1932         if (card->info.use_v1_blkt) {
1933                 card->info.blkt.time_total = 0;
1934                 card->info.blkt.inter_packet = 0;
1935                 card->info.blkt.inter_packet_jumbo = 0;
1936         } else {
1937                 card->info.blkt.time_total = 250;
1938                 card->info.blkt.inter_packet = 5;
1939                 card->info.blkt.inter_packet_jumbo = 15;
1940         }
1941 }
1942
1943 static void qeth_idx_init(struct qeth_card *card)
1944 {
1945         memset(&card->seqno, 0, sizeof(card->seqno));
1946
1947         card->token.issuer_rm_w = 0x00010103UL;
1948         card->token.cm_filter_w = 0x00010108UL;
1949         card->token.cm_connection_w = 0x0001010aUL;
1950         card->token.ulp_filter_w = 0x0001010bUL;
1951         card->token.ulp_connection_w = 0x0001010dUL;
1952
1953         switch (card->info.type) {
1954         case QETH_CARD_TYPE_IQD:
1955                 card->info.func_level = QETH_IDX_FUNC_LEVEL_IQD;
1956                 break;
1957         case QETH_CARD_TYPE_OSD:
1958         case QETH_CARD_TYPE_OSN:
1959                 card->info.func_level = QETH_IDX_FUNC_LEVEL_OSD;
1960                 break;
1961         default:
1962                 break;
1963         }
1964 }
1965
1966 static void qeth_idx_finalize_cmd(struct qeth_card *card,
1967                                   struct qeth_cmd_buffer *iob)
1968 {
1969         memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data), &card->seqno.trans_hdr,
1970                QETH_SEQ_NO_LENGTH);
1971         if (iob->channel == &card->write)
1972                 card->seqno.trans_hdr++;
1973 }
1974
1975 static int qeth_peer_func_level(int level)
1976 {
1977         if ((level & 0xff) == 8)
1978                 return (level & 0xff) + 0x400;
1979         if (((level >> 8) & 3) == 1)
1980                 return (level & 0xff) + 0x200;
1981         return level;
1982 }
1983
1984 static void qeth_mpc_finalize_cmd(struct qeth_card *card,
1985                                   struct qeth_cmd_buffer *iob)
1986 {
1987         qeth_idx_finalize_cmd(card, iob);
1988
1989         memcpy(QETH_PDU_HEADER_SEQ_NO(iob->data),
1990                &card->seqno.pdu_hdr, QETH_SEQ_NO_LENGTH);
1991         card->seqno.pdu_hdr++;
1992         memcpy(QETH_PDU_HEADER_ACK_SEQ_NO(iob->data),
1993                &card->seqno.pdu_hdr_ack, QETH_SEQ_NO_LENGTH);
1994
1995         iob->callback = qeth_release_buffer_cb;
1996 }
1997
1998 static bool qeth_mpc_match_reply(struct qeth_cmd_buffer *iob,
1999                                  struct qeth_cmd_buffer *reply)
2000 {
2001         /* MPC cmds are issued strictly in sequence. */
2002         return !IS_IPA(reply->data);
2003 }
2004
2005 static struct qeth_cmd_buffer *qeth_mpc_alloc_cmd(struct qeth_card *card,
2006                                                   const void *data,
2007                                                   unsigned int data_length)
2008 {
2009         struct qeth_cmd_buffer *iob;
2010
2011         iob = qeth_alloc_cmd(&card->write, data_length, 1, QETH_TIMEOUT);
2012         if (!iob)
2013                 return NULL;
2014
2015         memcpy(iob->data, data, data_length);
2016         qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, data_length,
2017                        iob->data);
2018         iob->finalize = qeth_mpc_finalize_cmd;
2019         iob->match = qeth_mpc_match_reply;
2020         return iob;
2021 }
2022
2023 /**
2024  * qeth_send_control_data() -   send control command to the card
2025  * @card:                       qeth_card structure pointer
2026  * @iob:                        qeth_cmd_buffer pointer
2027  * @reply_cb:                   callback function pointer
2028  * @cb_card:                    pointer to the qeth_card structure
2029  * @cb_reply:                   pointer to the qeth_reply structure
2030  * @cb_cmd:                     pointer to the original iob for non-IPA
2031  *                              commands, or to the qeth_ipa_cmd structure
2032  *                              for the IPA commands.
2033  * @reply_param:                private pointer passed to the callback
2034  *
2035  * Callback function gets called one or more times, with cb_cmd
2036  * pointing to the response returned by the hardware. Callback
2037  * function must return
2038  *   > 0 if more reply blocks are expected,
2039  *     0 if the last or only reply block is received, and
2040  *   < 0 on error.
2041  * Callback function can get the value of the reply_param pointer from the
2042  * field 'param' of the structure qeth_reply.
2043  */
2044
2045 static int qeth_send_control_data(struct qeth_card *card,
2046                                   struct qeth_cmd_buffer *iob,
2047                                   int (*reply_cb)(struct qeth_card *cb_card,
2048                                                   struct qeth_reply *cb_reply,
2049                                                   unsigned long cb_cmd),
2050                                   void *reply_param)
2051 {
2052         struct qeth_channel *channel = iob->channel;
2053         struct qeth_reply *reply = &iob->reply;
2054         long timeout = iob->timeout;
2055         int rc;
2056
2057         QETH_CARD_TEXT(card, 2, "sendctl");
2058
2059         reply->callback = reply_cb;
2060         reply->param = reply_param;
2061
2062         timeout = wait_event_interruptible_timeout(card->wait_q,
2063                                                    qeth_trylock_channel(channel),
2064                                                    timeout);
2065         if (timeout <= 0) {
2066                 qeth_put_cmd(iob);
2067                 return (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
2068         }
2069
2070         if (iob->finalize)
2071                 iob->finalize(card, iob);
2072         QETH_DBF_HEX(CTRL, 2, iob->data, min(iob->length, QETH_DBF_CTRL_LEN));
2073
2074         qeth_enqueue_cmd(card, iob);
2075
2076         /* This pairs with iob->callback, and keeps the iob alive after IO: */
2077         qeth_get_cmd(iob);
2078
2079         QETH_CARD_TEXT(card, 6, "noirqpnd");
2080         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
2081         rc = ccw_device_start_timeout(channel->ccwdev, __ccw_from_cmd(iob),
2082                                       (addr_t) iob, 0, 0, timeout);
2083         if (!rc)
2084                 channel->active_cmd = iob;
2085         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
2086         if (rc) {
2087                 QETH_DBF_MESSAGE(2, "qeth_send_control_data on device %x: ccw_device_start rc = %i\n",
2088                                  CARD_DEVID(card), rc);
2089                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
2090                 qeth_dequeue_cmd(card, iob);
2091                 qeth_put_cmd(iob);
2092                 qeth_unlock_channel(card, channel);
2093                 goto out;
2094         }
2095
2096         timeout = wait_for_completion_interruptible_timeout(&iob->done,
2097                                                             timeout);
2098         if (timeout <= 0)
2099                 rc = (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
2100
2101         qeth_dequeue_cmd(card, iob);
2102
2103         if (reply_cb) {
2104                 /* Wait until the callback for a late reply has completed: */
2105                 spin_lock_irq(&iob->lock);
2106                 if (rc)
2107                         /* Zap any callback that's still pending: */
2108                         iob->rc = rc;
2109                 spin_unlock_irq(&iob->lock);
2110         }
2111
2112         if (!rc)
2113                 rc = iob->rc;
2114
2115 out:
2116         qeth_put_cmd(iob);
2117         return rc;
2118 }
2119
2120 struct qeth_node_desc {
2121         struct node_descriptor nd1;
2122         struct node_descriptor nd2;
2123         struct node_descriptor nd3;
2124 };
2125
2126 static void qeth_read_conf_data_cb(struct qeth_card *card,
2127                                    struct qeth_cmd_buffer *iob,
2128                                    unsigned int data_length)
2129 {
2130         struct qeth_node_desc *nd = (struct qeth_node_desc *) iob->data;
2131         int rc = 0;
2132         u8 *tag;
2133
2134         QETH_CARD_TEXT(card, 2, "cfgunit");
2135
2136         if (data_length < sizeof(*nd)) {
2137                 rc = -EINVAL;
2138                 goto out;
2139         }
2140
2141         card->info.is_vm_nic = nd->nd1.plant[0] == _ascebc['V'] &&
2142                                nd->nd1.plant[1] == _ascebc['M'];
2143         tag = (u8 *)&nd->nd1.tag;
2144         card->info.chpid = tag[0];
2145         card->info.unit_addr2 = tag[1];
2146
2147         tag = (u8 *)&nd->nd2.tag;
2148         card->info.cula = tag[1];
2149
2150         card->info.use_v1_blkt = nd->nd3.model[0] == 0xF0 &&
2151                                  nd->nd3.model[1] == 0xF0 &&
2152                                  nd->nd3.model[2] >= 0xF1 &&
2153                                  nd->nd3.model[2] <= 0xF4;
2154
2155 out:
2156         qeth_notify_cmd(iob, rc);
2157         qeth_put_cmd(iob);
2158 }
2159
2160 static int qeth_read_conf_data(struct qeth_card *card)
2161 {
2162         struct qeth_channel *channel = &card->data;
2163         struct qeth_cmd_buffer *iob;
2164         struct ciw *ciw;
2165
2166         /* scan for RCD command in extended SenseID data */
2167         ciw = ccw_device_get_ciw(channel->ccwdev, CIW_TYPE_RCD);
2168         if (!ciw || ciw->cmd == 0)
2169                 return -EOPNOTSUPP;
2170         if (ciw->count < sizeof(struct qeth_node_desc))
2171                 return -EINVAL;
2172
2173         iob = qeth_alloc_cmd(channel, ciw->count, 1, QETH_RCD_TIMEOUT);
2174         if (!iob)
2175                 return -ENOMEM;
2176
2177         iob->callback = qeth_read_conf_data_cb;
2178         qeth_setup_ccw(__ccw_from_cmd(iob), ciw->cmd, 0, iob->length,
2179                        iob->data);
2180
2181         return qeth_send_control_data(card, iob, NULL, NULL);
2182 }
2183
2184 static int qeth_idx_check_activate_response(struct qeth_card *card,
2185                                             struct qeth_channel *channel,
2186                                             struct qeth_cmd_buffer *iob)
2187 {
2188         int rc;
2189
2190         rc = qeth_check_idx_response(card, iob->data);
2191         if (rc)
2192                 return rc;
2193
2194         if (QETH_IS_IDX_ACT_POS_REPLY(iob->data))
2195                 return 0;
2196
2197         /* negative reply: */
2198         QETH_CARD_TEXT_(card, 2, "idxneg%c",
2199                         QETH_IDX_ACT_CAUSE_CODE(iob->data));
2200
2201         switch (QETH_IDX_ACT_CAUSE_CODE(iob->data)) {
2202         case QETH_IDX_ACT_ERR_EXCL:
2203                 dev_err(&channel->ccwdev->dev,
2204                         "The adapter is used exclusively by another host\n");
2205                 return -EBUSY;
2206         case QETH_IDX_ACT_ERR_AUTH:
2207         case QETH_IDX_ACT_ERR_AUTH_USER:
2208                 dev_err(&channel->ccwdev->dev,
2209                         "Setting the device online failed because of insufficient authorization\n");
2210                 return -EPERM;
2211         default:
2212                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: negative reply\n",
2213                                  CCW_DEVID(channel->ccwdev));
2214                 return -EIO;
2215         }
2216 }
2217
2218 static void qeth_idx_activate_read_channel_cb(struct qeth_card *card,
2219                                               struct qeth_cmd_buffer *iob,
2220                                               unsigned int data_length)
2221 {
2222         struct qeth_channel *channel = iob->channel;
2223         u16 peer_level;
2224         int rc;
2225
2226         QETH_CARD_TEXT(card, 2, "idxrdcb");
2227
2228         rc = qeth_idx_check_activate_response(card, channel, iob);
2229         if (rc)
2230                 goto out;
2231
2232         memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2233         if (peer_level != qeth_peer_func_level(card->info.func_level)) {
2234                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
2235                                  CCW_DEVID(channel->ccwdev),
2236                                  card->info.func_level, peer_level);
2237                 rc = -EINVAL;
2238                 goto out;
2239         }
2240
2241         memcpy(&card->token.issuer_rm_r,
2242                QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2243                QETH_MPC_TOKEN_LENGTH);
2244         memcpy(&card->info.mcl_level[0],
2245                QETH_IDX_REPLY_LEVEL(iob->data), QETH_MCL_LENGTH);
2246
2247 out:
2248         qeth_notify_cmd(iob, rc);
2249         qeth_put_cmd(iob);
2250 }
2251
2252 static void qeth_idx_activate_write_channel_cb(struct qeth_card *card,
2253                                                struct qeth_cmd_buffer *iob,
2254                                                unsigned int data_length)
2255 {
2256         struct qeth_channel *channel = iob->channel;
2257         u16 peer_level;
2258         int rc;
2259
2260         QETH_CARD_TEXT(card, 2, "idxwrcb");
2261
2262         rc = qeth_idx_check_activate_response(card, channel, iob);
2263         if (rc)
2264                 goto out;
2265
2266         memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2267         if ((peer_level & ~0x0100) !=
2268             qeth_peer_func_level(card->info.func_level)) {
2269                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
2270                                  CCW_DEVID(channel->ccwdev),
2271                                  card->info.func_level, peer_level);
2272                 rc = -EINVAL;
2273         }
2274
2275 out:
2276         qeth_notify_cmd(iob, rc);
2277         qeth_put_cmd(iob);
2278 }
2279
2280 static void qeth_idx_setup_activate_cmd(struct qeth_card *card,
2281                                         struct qeth_cmd_buffer *iob)
2282 {
2283         u16 addr = (card->info.cula << 8) + card->info.unit_addr2;
2284         u8 port = ((u8)card->dev->dev_port) | 0x80;
2285         struct ccw1 *ccw = __ccw_from_cmd(iob);
2286
2287         qeth_setup_ccw(&ccw[0], CCW_CMD_WRITE, CCW_FLAG_CC, IDX_ACTIVATE_SIZE,
2288                        iob->data);
2289         qeth_setup_ccw(&ccw[1], CCW_CMD_READ, 0, iob->length, iob->data);
2290         iob->finalize = qeth_idx_finalize_cmd;
2291
2292         port |= QETH_IDX_ACT_INVAL_FRAME;
2293         memcpy(QETH_IDX_ACT_PNO(iob->data), &port, 1);
2294         memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2295                &card->token.issuer_rm_w, QETH_MPC_TOKEN_LENGTH);
2296         memcpy(QETH_IDX_ACT_FUNC_LEVEL(iob->data),
2297                &card->info.func_level, 2);
2298         memcpy(QETH_IDX_ACT_QDIO_DEV_CUA(iob->data), &card->info.ddev_devno, 2);
2299         memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &addr, 2);
2300 }
2301
2302 static int qeth_idx_activate_read_channel(struct qeth_card *card)
2303 {
2304         struct qeth_channel *channel = &card->read;
2305         struct qeth_cmd_buffer *iob;
2306         int rc;
2307
2308         QETH_CARD_TEXT(card, 2, "idxread");
2309
2310         iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
2311         if (!iob)
2312                 return -ENOMEM;
2313
2314         memcpy(iob->data, IDX_ACTIVATE_READ, IDX_ACTIVATE_SIZE);
2315         qeth_idx_setup_activate_cmd(card, iob);
2316         iob->callback = qeth_idx_activate_read_channel_cb;
2317
2318         rc = qeth_send_control_data(card, iob, NULL, NULL);
2319         if (rc)
2320                 return rc;
2321
2322         channel->state = CH_STATE_UP;
2323         return 0;
2324 }
2325
2326 static int qeth_idx_activate_write_channel(struct qeth_card *card)
2327 {
2328         struct qeth_channel *channel = &card->write;
2329         struct qeth_cmd_buffer *iob;
2330         int rc;
2331
2332         QETH_CARD_TEXT(card, 2, "idxwrite");
2333
2334         iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
2335         if (!iob)
2336                 return -ENOMEM;
2337
2338         memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE);
2339         qeth_idx_setup_activate_cmd(card, iob);
2340         iob->callback = qeth_idx_activate_write_channel_cb;
2341
2342         rc = qeth_send_control_data(card, iob, NULL, NULL);
2343         if (rc)
2344                 return rc;
2345
2346         channel->state = CH_STATE_UP;
2347         return 0;
2348 }
2349
2350 static int qeth_cm_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2351                 unsigned long data)
2352 {
2353         struct qeth_cmd_buffer *iob;
2354
2355         QETH_CARD_TEXT(card, 2, "cmenblcb");
2356
2357         iob = (struct qeth_cmd_buffer *) data;
2358         memcpy(&card->token.cm_filter_r,
2359                QETH_CM_ENABLE_RESP_FILTER_TOKEN(iob->data),
2360                QETH_MPC_TOKEN_LENGTH);
2361         return 0;
2362 }
2363
2364 static int qeth_cm_enable(struct qeth_card *card)
2365 {
2366         struct qeth_cmd_buffer *iob;
2367
2368         QETH_CARD_TEXT(card, 2, "cmenable");
2369
2370         iob = qeth_mpc_alloc_cmd(card, CM_ENABLE, CM_ENABLE_SIZE);
2371         if (!iob)
2372                 return -ENOMEM;
2373
2374         memcpy(QETH_CM_ENABLE_ISSUER_RM_TOKEN(iob->data),
2375                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2376         memcpy(QETH_CM_ENABLE_FILTER_TOKEN(iob->data),
2377                &card->token.cm_filter_w, QETH_MPC_TOKEN_LENGTH);
2378
2379         return qeth_send_control_data(card, iob, qeth_cm_enable_cb, NULL);
2380 }
2381
2382 static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2383                 unsigned long data)
2384 {
2385         struct qeth_cmd_buffer *iob;
2386
2387         QETH_CARD_TEXT(card, 2, "cmsetpcb");
2388
2389         iob = (struct qeth_cmd_buffer *) data;
2390         memcpy(&card->token.cm_connection_r,
2391                QETH_CM_SETUP_RESP_DEST_ADDR(iob->data),
2392                QETH_MPC_TOKEN_LENGTH);
2393         return 0;
2394 }
2395
2396 static int qeth_cm_setup(struct qeth_card *card)
2397 {
2398         struct qeth_cmd_buffer *iob;
2399
2400         QETH_CARD_TEXT(card, 2, "cmsetup");
2401
2402         iob = qeth_mpc_alloc_cmd(card, CM_SETUP, CM_SETUP_SIZE);
2403         if (!iob)
2404                 return -ENOMEM;
2405
2406         memcpy(QETH_CM_SETUP_DEST_ADDR(iob->data),
2407                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2408         memcpy(QETH_CM_SETUP_CONNECTION_TOKEN(iob->data),
2409                &card->token.cm_connection_w, QETH_MPC_TOKEN_LENGTH);
2410         memcpy(QETH_CM_SETUP_FILTER_TOKEN(iob->data),
2411                &card->token.cm_filter_r, QETH_MPC_TOKEN_LENGTH);
2412         return qeth_send_control_data(card, iob, qeth_cm_setup_cb, NULL);
2413 }
2414
2415 static bool qeth_is_supported_link_type(struct qeth_card *card, u8 link_type)
2416 {
2417         if (link_type == QETH_LINK_TYPE_LANE_TR ||
2418             link_type == QETH_LINK_TYPE_HSTR) {
2419                 dev_err(&card->gdev->dev, "Unsupported Token Ring device\n");
2420                 return false;
2421         }
2422
2423         return true;
2424 }
2425
2426 static int qeth_update_max_mtu(struct qeth_card *card, unsigned int max_mtu)
2427 {
2428         struct net_device *dev = card->dev;
2429         unsigned int new_mtu;
2430
2431         if (!max_mtu) {
2432                 /* IQD needs accurate max MTU to set up its RX buffers: */
2433                 if (IS_IQD(card))
2434                         return -EINVAL;
2435                 /* tolerate quirky HW: */
2436                 max_mtu = ETH_MAX_MTU;
2437         }
2438
2439         rtnl_lock();
2440         if (IS_IQD(card)) {
2441                 /* move any device with default MTU to new max MTU: */
2442                 new_mtu = (dev->mtu == dev->max_mtu) ? max_mtu : dev->mtu;
2443
2444                 /* adjust RX buffer size to new max MTU: */
2445                 card->qdio.in_buf_size = max_mtu + 2 * PAGE_SIZE;
2446                 if (dev->max_mtu && dev->max_mtu != max_mtu)
2447                         qeth_free_qdio_queues(card);
2448         } else {
2449                 if (dev->mtu)
2450                         new_mtu = dev->mtu;
2451                 /* default MTUs for first setup: */
2452                 else if (IS_LAYER2(card))
2453                         new_mtu = ETH_DATA_LEN;
2454                 else
2455                         new_mtu = ETH_DATA_LEN - 8; /* allow for LLC + SNAP */
2456         }
2457
2458         dev->max_mtu = max_mtu;
2459         dev->mtu = min(new_mtu, max_mtu);
2460         rtnl_unlock();
2461         return 0;
2462 }
2463
2464 static int qeth_get_mtu_outof_framesize(int framesize)
2465 {
2466         switch (framesize) {
2467         case 0x4000:
2468                 return 8192;
2469         case 0x6000:
2470                 return 16384;
2471         case 0xa000:
2472                 return 32768;
2473         case 0xffff:
2474                 return 57344;
2475         default:
2476                 return 0;
2477         }
2478 }
2479
2480 static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2481                 unsigned long data)
2482 {
2483         __u16 mtu, framesize;
2484         __u16 len;
2485         struct qeth_cmd_buffer *iob;
2486         u8 link_type = 0;
2487
2488         QETH_CARD_TEXT(card, 2, "ulpenacb");
2489
2490         iob = (struct qeth_cmd_buffer *) data;
2491         memcpy(&card->token.ulp_filter_r,
2492                QETH_ULP_ENABLE_RESP_FILTER_TOKEN(iob->data),
2493                QETH_MPC_TOKEN_LENGTH);
2494         if (IS_IQD(card)) {
2495                 memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2);
2496                 mtu = qeth_get_mtu_outof_framesize(framesize);
2497         } else {
2498                 mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data);
2499         }
2500         *(u16 *)reply->param = mtu;
2501
2502         memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2);
2503         if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) {
2504                 memcpy(&link_type,
2505                        QETH_ULP_ENABLE_RESP_LINK_TYPE(iob->data), 1);
2506                 if (!qeth_is_supported_link_type(card, link_type))
2507                         return -EPROTONOSUPPORT;
2508         }
2509
2510         card->info.link_type = link_type;
2511         QETH_CARD_TEXT_(card, 2, "link%d", card->info.link_type);
2512         return 0;
2513 }
2514
2515 static u8 qeth_mpc_select_prot_type(struct qeth_card *card)
2516 {
2517         if (IS_OSN(card))
2518                 return QETH_PROT_OSN2;
2519         return IS_LAYER2(card) ? QETH_PROT_LAYER2 : QETH_PROT_TCPIP;
2520 }
2521
2522 static int qeth_ulp_enable(struct qeth_card *card)
2523 {
2524         u8 prot_type = qeth_mpc_select_prot_type(card);
2525         struct qeth_cmd_buffer *iob;
2526         u16 max_mtu;
2527         int rc;
2528
2529         QETH_CARD_TEXT(card, 2, "ulpenabl");
2530
2531         iob = qeth_mpc_alloc_cmd(card, ULP_ENABLE, ULP_ENABLE_SIZE);
2532         if (!iob)
2533                 return -ENOMEM;
2534
2535         *(QETH_ULP_ENABLE_LINKNUM(iob->data)) = (u8) card->dev->dev_port;
2536         memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1);
2537         memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data),
2538                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2539         memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data),
2540                &card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH);
2541         rc = qeth_send_control_data(card, iob, qeth_ulp_enable_cb, &max_mtu);
2542         if (rc)
2543                 return rc;
2544         return qeth_update_max_mtu(card, max_mtu);
2545 }
2546
2547 static int qeth_ulp_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2548                 unsigned long data)
2549 {
2550         struct qeth_cmd_buffer *iob;
2551
2552         QETH_CARD_TEXT(card, 2, "ulpstpcb");
2553
2554         iob = (struct qeth_cmd_buffer *) data;
2555         memcpy(&card->token.ulp_connection_r,
2556                QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2557                QETH_MPC_TOKEN_LENGTH);
2558         if (!strncmp("00S", QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2559                      3)) {
2560                 QETH_CARD_TEXT(card, 2, "olmlimit");
2561                 dev_err(&card->gdev->dev, "A connection could not be "
2562                         "established because of an OLM limit\n");
2563                 return -EMLINK;
2564         }
2565         return 0;
2566 }
2567
2568 static int qeth_ulp_setup(struct qeth_card *card)
2569 {
2570         __u16 temp;
2571         struct qeth_cmd_buffer *iob;
2572
2573         QETH_CARD_TEXT(card, 2, "ulpsetup");
2574
2575         iob = qeth_mpc_alloc_cmd(card, ULP_SETUP, ULP_SETUP_SIZE);
2576         if (!iob)
2577                 return -ENOMEM;
2578
2579         memcpy(QETH_ULP_SETUP_DEST_ADDR(iob->data),
2580                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2581         memcpy(QETH_ULP_SETUP_CONNECTION_TOKEN(iob->data),
2582                &card->token.ulp_connection_w, QETH_MPC_TOKEN_LENGTH);
2583         memcpy(QETH_ULP_SETUP_FILTER_TOKEN(iob->data),
2584                &card->token.ulp_filter_r, QETH_MPC_TOKEN_LENGTH);
2585
2586         memcpy(QETH_ULP_SETUP_CUA(iob->data), &card->info.ddev_devno, 2);
2587         temp = (card->info.cula << 8) + card->info.unit_addr2;
2588         memcpy(QETH_ULP_SETUP_REAL_DEVADDR(iob->data), &temp, 2);
2589         return qeth_send_control_data(card, iob, qeth_ulp_setup_cb, NULL);
2590 }
2591
2592 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *q, int bidx)
2593 {
2594         struct qeth_qdio_out_buffer *newbuf;
2595
2596         newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, GFP_ATOMIC);
2597         if (!newbuf)
2598                 return -ENOMEM;
2599
2600         newbuf->buffer = q->qdio_bufs[bidx];
2601         skb_queue_head_init(&newbuf->skb_list);
2602         lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key);
2603         newbuf->q = q;
2604         atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY);
2605         q->bufs[bidx] = newbuf;
2606         return 0;
2607 }
2608
2609 static void qeth_free_output_queue(struct qeth_qdio_out_q *q)
2610 {
2611         if (!q)
2612                 return;
2613
2614         qeth_drain_output_queue(q, true);
2615         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2616         kfree(q);
2617 }
2618
2619 static struct qeth_qdio_out_q *qeth_alloc_output_queue(void)
2620 {
2621         struct qeth_qdio_out_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
2622         unsigned int i;
2623
2624         if (!q)
2625                 return NULL;
2626
2627         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q))
2628                 goto err_qdio_bufs;
2629
2630         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) {
2631                 if (qeth_init_qdio_out_buf(q, i))
2632                         goto err_out_bufs;
2633         }
2634
2635         return q;
2636
2637 err_out_bufs:
2638         while (i > 0)
2639                 kmem_cache_free(qeth_qdio_outbuf_cache, q->bufs[--i]);
2640         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2641 err_qdio_bufs:
2642         kfree(q);
2643         return NULL;
2644 }
2645
2646 static void qeth_tx_completion_timer(struct timer_list *timer)
2647 {
2648         struct qeth_qdio_out_q *queue = from_timer(queue, timer, timer);
2649
2650         napi_schedule(&queue->napi);
2651         QETH_TXQ_STAT_INC(queue, completion_timer);
2652 }
2653
2654 static int qeth_alloc_qdio_queues(struct qeth_card *card)
2655 {
2656         unsigned int i;
2657
2658         QETH_CARD_TEXT(card, 2, "allcqdbf");
2659
2660         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED,
2661                 QETH_QDIO_ALLOCATED) != QETH_QDIO_UNINITIALIZED)
2662                 return 0;
2663
2664         QETH_CARD_TEXT(card, 2, "inq");
2665         card->qdio.in_q = qeth_alloc_qdio_queue();
2666         if (!card->qdio.in_q)
2667                 goto out_nomem;
2668
2669         /* inbound buffer pool */
2670         if (qeth_alloc_buffer_pool(card))
2671                 goto out_freeinq;
2672
2673         /* outbound */
2674         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2675                 struct qeth_qdio_out_q *queue;
2676
2677                 queue = qeth_alloc_output_queue();
2678                 if (!queue)
2679                         goto out_freeoutq;
2680                 QETH_CARD_TEXT_(card, 2, "outq %i", i);
2681                 QETH_CARD_HEX(card, 2, &queue, sizeof(void *));
2682                 card->qdio.out_qs[i] = queue;
2683                 queue->card = card;
2684                 queue->queue_no = i;
2685                 INIT_LIST_HEAD(&queue->pending_bufs);
2686                 spin_lock_init(&queue->lock);
2687                 timer_setup(&queue->timer, qeth_tx_completion_timer, 0);
2688                 queue->coalesce_usecs = QETH_TX_COALESCE_USECS;
2689                 queue->max_coalesced_frames = QETH_TX_MAX_COALESCED_FRAMES;
2690                 queue->priority = QETH_QIB_PQUE_PRIO_DEFAULT;
2691         }
2692
2693         /* completion */
2694         if (qeth_alloc_cq(card))
2695                 goto out_freeoutq;
2696
2697         return 0;
2698
2699 out_freeoutq:
2700         while (i > 0) {
2701                 qeth_free_output_queue(card->qdio.out_qs[--i]);
2702                 card->qdio.out_qs[i] = NULL;
2703         }
2704         qeth_free_buffer_pool(card);
2705 out_freeinq:
2706         qeth_free_qdio_queue(card->qdio.in_q);
2707         card->qdio.in_q = NULL;
2708 out_nomem:
2709         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
2710         return -ENOMEM;
2711 }
2712
2713 static void qeth_free_qdio_queues(struct qeth_card *card)
2714 {
2715         int i, j;
2716
2717         if (atomic_xchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED) ==
2718                 QETH_QDIO_UNINITIALIZED)
2719                 return;
2720
2721         qeth_free_cq(card);
2722         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2723                 if (card->qdio.in_q->bufs[j].rx_skb)
2724                         dev_kfree_skb_any(card->qdio.in_q->bufs[j].rx_skb);
2725         }
2726         qeth_free_qdio_queue(card->qdio.in_q);
2727         card->qdio.in_q = NULL;
2728         /* inbound buffer pool */
2729         qeth_free_buffer_pool(card);
2730         /* free outbound qdio_qs */
2731         for (i = 0; i < card->qdio.no_out_queues; i++) {
2732                 qeth_free_output_queue(card->qdio.out_qs[i]);
2733                 card->qdio.out_qs[i] = NULL;
2734         }
2735 }
2736
2737 static void qeth_fill_qib_parms(struct qeth_card *card,
2738                                 struct qeth_qib_parms *parms)
2739 {
2740         struct qeth_qdio_out_q *queue;
2741         unsigned int i;
2742
2743         parms->pcit_magic[0] = 'P';
2744         parms->pcit_magic[1] = 'C';
2745         parms->pcit_magic[2] = 'I';
2746         parms->pcit_magic[3] = 'T';
2747         ASCEBC(parms->pcit_magic, sizeof(parms->pcit_magic));
2748         parms->pcit_a = QETH_PCI_THRESHOLD_A(card);
2749         parms->pcit_b = QETH_PCI_THRESHOLD_B(card);
2750         parms->pcit_c = QETH_PCI_TIMER_VALUE(card);
2751
2752         parms->blkt_magic[0] = 'B';
2753         parms->blkt_magic[1] = 'L';
2754         parms->blkt_magic[2] = 'K';
2755         parms->blkt_magic[3] = 'T';
2756         ASCEBC(parms->blkt_magic, sizeof(parms->blkt_magic));
2757         parms->blkt_total = card->info.blkt.time_total;
2758         parms->blkt_inter_packet = card->info.blkt.inter_packet;
2759         parms->blkt_inter_packet_jumbo = card->info.blkt.inter_packet_jumbo;
2760
2761         /* Prio-queueing implicitly uses the default priorities: */
2762         if (qeth_uses_tx_prio_queueing(card) || card->qdio.no_out_queues == 1)
2763                 return;
2764
2765         parms->pque_magic[0] = 'P';
2766         parms->pque_magic[1] = 'Q';
2767         parms->pque_magic[2] = 'U';
2768         parms->pque_magic[3] = 'E';
2769         ASCEBC(parms->pque_magic, sizeof(parms->pque_magic));
2770         parms->pque_order = QETH_QIB_PQUE_ORDER_RR;
2771         parms->pque_units = QETH_QIB_PQUE_UNITS_SBAL;
2772
2773         qeth_for_each_output_queue(card, queue, i)
2774                 parms->pque_priority[i] = queue->priority;
2775 }
2776
2777 static int qeth_qdio_activate(struct qeth_card *card)
2778 {
2779         QETH_CARD_TEXT(card, 3, "qdioact");
2780         return qdio_activate(CARD_DDEV(card));
2781 }
2782
2783 static int qeth_dm_act(struct qeth_card *card)
2784 {
2785         struct qeth_cmd_buffer *iob;
2786
2787         QETH_CARD_TEXT(card, 2, "dmact");
2788
2789         iob = qeth_mpc_alloc_cmd(card, DM_ACT, DM_ACT_SIZE);
2790         if (!iob)
2791                 return -ENOMEM;
2792
2793         memcpy(QETH_DM_ACT_DEST_ADDR(iob->data),
2794                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2795         memcpy(QETH_DM_ACT_CONNECTION_TOKEN(iob->data),
2796                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2797         return qeth_send_control_data(card, iob, NULL, NULL);
2798 }
2799
2800 static int qeth_mpc_initialize(struct qeth_card *card)
2801 {
2802         int rc;
2803
2804         QETH_CARD_TEXT(card, 2, "mpcinit");
2805
2806         rc = qeth_issue_next_read(card);
2807         if (rc) {
2808                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
2809                 return rc;
2810         }
2811         rc = qeth_cm_enable(card);
2812         if (rc) {
2813                 QETH_CARD_TEXT_(card, 2, "2err%d", rc);
2814                 return rc;
2815         }
2816         rc = qeth_cm_setup(card);
2817         if (rc) {
2818                 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
2819                 return rc;
2820         }
2821         rc = qeth_ulp_enable(card);
2822         if (rc) {
2823                 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
2824                 return rc;
2825         }
2826         rc = qeth_ulp_setup(card);
2827         if (rc) {
2828                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2829                 return rc;
2830         }
2831         rc = qeth_alloc_qdio_queues(card);
2832         if (rc) {
2833                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2834                 return rc;
2835         }
2836         rc = qeth_qdio_establish(card);
2837         if (rc) {
2838                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
2839                 qeth_free_qdio_queues(card);
2840                 return rc;
2841         }
2842         rc = qeth_qdio_activate(card);
2843         if (rc) {
2844                 QETH_CARD_TEXT_(card, 2, "7err%d", rc);
2845                 return rc;
2846         }
2847         rc = qeth_dm_act(card);
2848         if (rc) {
2849                 QETH_CARD_TEXT_(card, 2, "8err%d", rc);
2850                 return rc;
2851         }
2852
2853         return 0;
2854 }
2855
2856 static void qeth_print_status_message(struct qeth_card *card)
2857 {
2858         switch (card->info.type) {
2859         case QETH_CARD_TYPE_OSD:
2860         case QETH_CARD_TYPE_OSM:
2861         case QETH_CARD_TYPE_OSX:
2862                 /* VM will use a non-zero first character
2863                  * to indicate a HiperSockets like reporting
2864                  * of the level OSA sets the first character to zero
2865                  * */
2866                 if (!card->info.mcl_level[0]) {
2867                         sprintf(card->info.mcl_level, "%02x%02x",
2868                                 card->info.mcl_level[2],
2869                                 card->info.mcl_level[3]);
2870                         break;
2871                 }
2872                 fallthrough;
2873         case QETH_CARD_TYPE_IQD:
2874                 if (IS_VM_NIC(card) || (card->info.mcl_level[0] & 0x80)) {
2875                         card->info.mcl_level[0] = (char) _ebcasc[(__u8)
2876                                 card->info.mcl_level[0]];
2877                         card->info.mcl_level[1] = (char) _ebcasc[(__u8)
2878                                 card->info.mcl_level[1]];
2879                         card->info.mcl_level[2] = (char) _ebcasc[(__u8)
2880                                 card->info.mcl_level[2]];
2881                         card->info.mcl_level[3] = (char) _ebcasc[(__u8)
2882                                 card->info.mcl_level[3]];
2883                         card->info.mcl_level[QETH_MCL_LENGTH] = 0;
2884                 }
2885                 break;
2886         default:
2887                 memset(&card->info.mcl_level[0], 0, QETH_MCL_LENGTH + 1);
2888         }
2889         dev_info(&card->gdev->dev,
2890                  "Device is a%s card%s%s%s\nwith link type %s.\n",
2891                  qeth_get_cardname(card),
2892                  (card->info.mcl_level[0]) ? " (level: " : "",
2893                  (card->info.mcl_level[0]) ? card->info.mcl_level : "",
2894                  (card->info.mcl_level[0]) ? ")" : "",
2895                  qeth_get_cardname_short(card));
2896 }
2897
2898 static void qeth_initialize_working_pool_list(struct qeth_card *card)
2899 {
2900         struct qeth_buffer_pool_entry *entry;
2901
2902         QETH_CARD_TEXT(card, 5, "inwrklst");
2903
2904         list_for_each_entry(entry,
2905                             &card->qdio.init_pool.entry_list, init_list) {
2906                 qeth_put_buffer_pool_entry(card, entry);
2907         }
2908 }
2909
2910 static struct qeth_buffer_pool_entry *qeth_find_free_buffer_pool_entry(
2911                                         struct qeth_card *card)
2912 {
2913         struct qeth_buffer_pool_entry *entry;
2914         int i, free;
2915
2916         if (list_empty(&card->qdio.in_buf_pool.entry_list))
2917                 return NULL;
2918
2919         list_for_each_entry(entry, &card->qdio.in_buf_pool.entry_list, list) {
2920                 free = 1;
2921                 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2922                         if (page_count(entry->elements[i]) > 1) {
2923                                 free = 0;
2924                                 break;
2925                         }
2926                 }
2927                 if (free) {
2928                         list_del_init(&entry->list);
2929                         return entry;
2930                 }
2931         }
2932
2933         /* no free buffer in pool so take first one and swap pages */
2934         entry = list_first_entry(&card->qdio.in_buf_pool.entry_list,
2935                                  struct qeth_buffer_pool_entry, list);
2936         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2937                 if (page_count(entry->elements[i]) > 1) {
2938                         struct page *page = dev_alloc_page();
2939
2940                         if (!page)
2941                                 return NULL;
2942
2943                         __free_page(entry->elements[i]);
2944                         entry->elements[i] = page;
2945                         QETH_CARD_STAT_INC(card, rx_sg_alloc_page);
2946                 }
2947         }
2948         list_del_init(&entry->list);
2949         return entry;
2950 }
2951
2952 static int qeth_init_input_buffer(struct qeth_card *card,
2953                 struct qeth_qdio_buffer *buf)
2954 {
2955         struct qeth_buffer_pool_entry *pool_entry = buf->pool_entry;
2956         int i;
2957
2958         if ((card->options.cq == QETH_CQ_ENABLED) && (!buf->rx_skb)) {
2959                 buf->rx_skb = netdev_alloc_skb(card->dev,
2960                                                ETH_HLEN +
2961                                                sizeof(struct ipv6hdr));
2962                 if (!buf->rx_skb)
2963                         return -ENOMEM;
2964         }
2965
2966         if (!pool_entry) {
2967                 pool_entry = qeth_find_free_buffer_pool_entry(card);
2968                 if (!pool_entry)
2969                         return -ENOBUFS;
2970
2971                 buf->pool_entry = pool_entry;
2972         }
2973
2974         /*
2975          * since the buffer is accessed only from the input_tasklet
2976          * there shouldn't be a need to synchronize; also, since we use
2977          * the QETH_IN_BUF_REQUEUE_THRESHOLD we should never run  out off
2978          * buffers
2979          */
2980         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2981                 buf->buffer->element[i].length = PAGE_SIZE;
2982                 buf->buffer->element[i].addr =
2983                         page_to_phys(pool_entry->elements[i]);
2984                 if (i == QETH_MAX_BUFFER_ELEMENTS(card) - 1)
2985                         buf->buffer->element[i].eflags = SBAL_EFLAGS_LAST_ENTRY;
2986                 else
2987                         buf->buffer->element[i].eflags = 0;
2988                 buf->buffer->element[i].sflags = 0;
2989         }
2990         return 0;
2991 }
2992
2993 static unsigned int qeth_tx_select_bulk_max(struct qeth_card *card,
2994                                             struct qeth_qdio_out_q *queue)
2995 {
2996         if (!IS_IQD(card) ||
2997             qeth_iqd_is_mcast_queue(card, queue) ||
2998             card->options.cq == QETH_CQ_ENABLED ||
2999             qdio_get_ssqd_desc(CARD_DDEV(card), &card->ssqd))
3000                 return 1;
3001
3002         return card->ssqd.mmwc ? card->ssqd.mmwc : 1;
3003 }
3004
3005 static int qeth_init_qdio_queues(struct qeth_card *card)
3006 {
3007         unsigned int rx_bufs = card->qdio.in_buf_pool.buf_count;
3008         unsigned int i;
3009         int rc;
3010
3011         QETH_CARD_TEXT(card, 2, "initqdqs");
3012
3013         /* inbound queue */
3014         qdio_reset_buffers(card->qdio.in_q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
3015         memset(&card->rx, 0, sizeof(struct qeth_rx));
3016
3017         qeth_initialize_working_pool_list(card);
3018         /*give only as many buffers to hardware as we have buffer pool entries*/
3019         for (i = 0; i < rx_bufs; i++) {
3020                 rc = qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]);
3021                 if (rc)
3022                         return rc;
3023         }
3024
3025         card->qdio.in_q->next_buf_to_init = QDIO_BUFNR(rx_bufs);
3026         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0, 0, rx_bufs);
3027         if (rc) {
3028                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
3029                 return rc;
3030         }
3031
3032         /* completion */
3033         rc = qeth_cq_init(card);
3034         if (rc) {
3035                 return rc;
3036         }
3037
3038         /* outbound queue */
3039         for (i = 0; i < card->qdio.no_out_queues; ++i) {
3040                 struct qeth_qdio_out_q *queue = card->qdio.out_qs[i];
3041
3042                 qdio_reset_buffers(queue->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
3043                 queue->max_elements = QETH_MAX_BUFFER_ELEMENTS(card);
3044                 queue->next_buf_to_fill = 0;
3045                 queue->do_pack = 0;
3046                 queue->prev_hdr = NULL;
3047                 queue->coalesced_frames = 0;
3048                 queue->bulk_start = 0;
3049                 queue->bulk_count = 0;
3050                 queue->bulk_max = qeth_tx_select_bulk_max(card, queue);
3051                 atomic_set(&queue->used_buffers, 0);
3052                 atomic_set(&queue->set_pci_flags_count, 0);
3053                 netdev_tx_reset_queue(netdev_get_tx_queue(card->dev, i));
3054         }
3055         return 0;
3056 }
3057
3058 static void qeth_ipa_finalize_cmd(struct qeth_card *card,
3059                                   struct qeth_cmd_buffer *iob)
3060 {
3061         qeth_mpc_finalize_cmd(card, iob);
3062
3063         /* override with IPA-specific values: */
3064         __ipa_cmd(iob)->hdr.seqno = card->seqno.ipa++;
3065 }
3066
3067 void qeth_prepare_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
3068                           u16 cmd_length,
3069                           bool (*match)(struct qeth_cmd_buffer *iob,
3070                                         struct qeth_cmd_buffer *reply))
3071 {
3072         u8 prot_type = qeth_mpc_select_prot_type(card);
3073         u16 total_length = iob->length;
3074
3075         qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, total_length,
3076                        iob->data);
3077         iob->finalize = qeth_ipa_finalize_cmd;
3078         iob->match = match;
3079
3080         memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
3081         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &total_length, 2);
3082         memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1);
3083         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &cmd_length, 2);
3084         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &cmd_length, 2);
3085         memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
3086                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
3087         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &cmd_length, 2);
3088 }
3089 EXPORT_SYMBOL_GPL(qeth_prepare_ipa_cmd);
3090
3091 static bool qeth_ipa_match_reply(struct qeth_cmd_buffer *iob,
3092                                  struct qeth_cmd_buffer *reply)
3093 {
3094         struct qeth_ipa_cmd *ipa_reply = __ipa_reply(reply);
3095
3096         return ipa_reply && (__ipa_cmd(iob)->hdr.seqno == ipa_reply->hdr.seqno);
3097 }
3098
3099 struct qeth_cmd_buffer *qeth_ipa_alloc_cmd(struct qeth_card *card,
3100                                            enum qeth_ipa_cmds cmd_code,
3101                                            enum qeth_prot_versions prot,
3102                                            unsigned int data_length)
3103 {
3104         struct qeth_cmd_buffer *iob;
3105         struct qeth_ipacmd_hdr *hdr;
3106
3107         data_length += offsetof(struct qeth_ipa_cmd, data);
3108         iob = qeth_alloc_cmd(&card->write, IPA_PDU_HEADER_SIZE + data_length, 1,
3109                              QETH_IPA_TIMEOUT);
3110         if (!iob)
3111                 return NULL;
3112
3113         qeth_prepare_ipa_cmd(card, iob, data_length, qeth_ipa_match_reply);
3114
3115         hdr = &__ipa_cmd(iob)->hdr;
3116         hdr->command = cmd_code;
3117         hdr->initiator = IPA_CMD_INITIATOR_HOST;
3118         /* hdr->seqno is set by qeth_send_control_data() */
3119         hdr->adapter_type = QETH_LINK_TYPE_FAST_ETH;
3120         hdr->rel_adapter_no = (u8) card->dev->dev_port;
3121         hdr->prim_version_no = IS_LAYER2(card) ? 2 : 1;
3122         hdr->param_count = 1;
3123         hdr->prot_version = prot;
3124         return iob;
3125 }
3126 EXPORT_SYMBOL_GPL(qeth_ipa_alloc_cmd);
3127
3128 static int qeth_send_ipa_cmd_cb(struct qeth_card *card,
3129                                 struct qeth_reply *reply, unsigned long data)
3130 {
3131         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3132
3133         return (cmd->hdr.return_code) ? -EIO : 0;
3134 }
3135
3136 /**
3137  * qeth_send_ipa_cmd() - send an IPA command
3138  *
3139  * See qeth_send_control_data() for explanation of the arguments.
3140  */
3141
3142 int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
3143                 int (*reply_cb)(struct qeth_card *, struct qeth_reply*,
3144                         unsigned long),
3145                 void *reply_param)
3146 {
3147         int rc;
3148
3149         QETH_CARD_TEXT(card, 4, "sendipa");
3150
3151         if (card->read_or_write_problem) {
3152                 qeth_put_cmd(iob);
3153                 return -EIO;
3154         }
3155
3156         if (reply_cb == NULL)
3157                 reply_cb = qeth_send_ipa_cmd_cb;
3158         rc = qeth_send_control_data(card, iob, reply_cb, reply_param);
3159         if (rc == -ETIME) {
3160                 qeth_clear_ipacmd_list(card);
3161                 qeth_schedule_recovery(card);
3162         }
3163         return rc;
3164 }
3165 EXPORT_SYMBOL_GPL(qeth_send_ipa_cmd);
3166
3167 static int qeth_send_startlan_cb(struct qeth_card *card,
3168                                  struct qeth_reply *reply, unsigned long data)
3169 {
3170         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3171
3172         if (cmd->hdr.return_code == IPA_RC_LAN_OFFLINE)
3173                 return -ENETDOWN;
3174
3175         return (cmd->hdr.return_code) ? -EIO : 0;
3176 }
3177
3178 static int qeth_send_startlan(struct qeth_card *card)
3179 {
3180         struct qeth_cmd_buffer *iob;
3181
3182         QETH_CARD_TEXT(card, 2, "strtlan");
3183
3184         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_STARTLAN, QETH_PROT_NONE, 0);
3185         if (!iob)
3186                 return -ENOMEM;
3187         return qeth_send_ipa_cmd(card, iob, qeth_send_startlan_cb, NULL);
3188 }
3189
3190 static int qeth_setadpparms_inspect_rc(struct qeth_ipa_cmd *cmd)
3191 {
3192         if (!cmd->hdr.return_code)
3193                 cmd->hdr.return_code =
3194                         cmd->data.setadapterparms.hdr.return_code;
3195         return cmd->hdr.return_code;
3196 }
3197
3198 static int qeth_query_setadapterparms_cb(struct qeth_card *card,
3199                 struct qeth_reply *reply, unsigned long data)
3200 {
3201         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3202         struct qeth_query_cmds_supp *query_cmd;
3203
3204         QETH_CARD_TEXT(card, 3, "quyadpcb");
3205         if (qeth_setadpparms_inspect_rc(cmd))
3206                 return -EIO;
3207
3208         query_cmd = &cmd->data.setadapterparms.data.query_cmds_supp;
3209         if (query_cmd->lan_type & 0x7f) {
3210                 if (!qeth_is_supported_link_type(card, query_cmd->lan_type))
3211                         return -EPROTONOSUPPORT;
3212
3213                 card->info.link_type = query_cmd->lan_type;
3214                 QETH_CARD_TEXT_(card, 2, "lnk %d", card->info.link_type);
3215         }
3216
3217         card->options.adp.supported = query_cmd->supported_cmds;
3218         return 0;
3219 }
3220
3221 static struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card,
3222                                                     enum qeth_ipa_setadp_cmd adp_cmd,
3223                                                     unsigned int data_length)
3224 {
3225         struct qeth_ipacmd_setadpparms_hdr *hdr;
3226         struct qeth_cmd_buffer *iob;
3227
3228         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETADAPTERPARMS, QETH_PROT_IPV4,
3229                                  data_length +
3230                                  offsetof(struct qeth_ipacmd_setadpparms,
3231                                           data));
3232         if (!iob)
3233                 return NULL;
3234
3235         hdr = &__ipa_cmd(iob)->data.setadapterparms.hdr;
3236         hdr->cmdlength = sizeof(*hdr) + data_length;
3237         hdr->command_code = adp_cmd;
3238         hdr->used_total = 1;
3239         hdr->seq_no = 1;
3240         return iob;
3241 }
3242
3243 static int qeth_query_setadapterparms(struct qeth_card *card)
3244 {
3245         int rc;
3246         struct qeth_cmd_buffer *iob;
3247
3248         QETH_CARD_TEXT(card, 3, "queryadp");
3249         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_COMMANDS_SUPPORTED,
3250                                    SETADP_DATA_SIZEOF(query_cmds_supp));
3251         if (!iob)
3252                 return -ENOMEM;
3253         rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL);
3254         return rc;
3255 }
3256
3257 static int qeth_query_ipassists_cb(struct qeth_card *card,
3258                 struct qeth_reply *reply, unsigned long data)
3259 {
3260         struct qeth_ipa_cmd *cmd;
3261
3262         QETH_CARD_TEXT(card, 2, "qipasscb");
3263
3264         cmd = (struct qeth_ipa_cmd *) data;
3265
3266         switch (cmd->hdr.return_code) {
3267         case IPA_RC_SUCCESS:
3268                 break;
3269         case IPA_RC_NOTSUPP:
3270         case IPA_RC_L2_UNSUPPORTED_CMD:
3271                 QETH_CARD_TEXT(card, 2, "ipaunsup");
3272                 card->options.ipa4.supported |= IPA_SETADAPTERPARMS;
3273                 card->options.ipa6.supported |= IPA_SETADAPTERPARMS;
3274                 return -EOPNOTSUPP;
3275         default:
3276                 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Unhandled rc=%#x\n",
3277                                  CARD_DEVID(card), cmd->hdr.return_code);
3278                 return -EIO;
3279         }
3280
3281         if (cmd->hdr.prot_version == QETH_PROT_IPV4)
3282                 card->options.ipa4 = cmd->hdr.assists;
3283         else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
3284                 card->options.ipa6 = cmd->hdr.assists;
3285         else
3286                 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Flawed LIC detected\n",
3287                                  CARD_DEVID(card));
3288         return 0;
3289 }
3290
3291 static int qeth_query_ipassists(struct qeth_card *card,
3292                                 enum qeth_prot_versions prot)
3293 {
3294         int rc;
3295         struct qeth_cmd_buffer *iob;
3296
3297         QETH_CARD_TEXT_(card, 2, "qipassi%i", prot);
3298         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_QIPASSIST, prot, 0);
3299         if (!iob)
3300                 return -ENOMEM;
3301         rc = qeth_send_ipa_cmd(card, iob, qeth_query_ipassists_cb, NULL);
3302         return rc;
3303 }
3304
3305 static int qeth_query_switch_attributes_cb(struct qeth_card *card,
3306                                 struct qeth_reply *reply, unsigned long data)
3307 {
3308         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3309         struct qeth_query_switch_attributes *attrs;
3310         struct qeth_switch_info *sw_info;
3311
3312         QETH_CARD_TEXT(card, 2, "qswiatcb");
3313         if (qeth_setadpparms_inspect_rc(cmd))
3314                 return -EIO;
3315
3316         sw_info = (struct qeth_switch_info *)reply->param;
3317         attrs = &cmd->data.setadapterparms.data.query_switch_attributes;
3318         sw_info->capabilities = attrs->capabilities;
3319         sw_info->settings = attrs->settings;
3320         QETH_CARD_TEXT_(card, 2, "%04x%04x", sw_info->capabilities,
3321                         sw_info->settings);
3322         return 0;
3323 }
3324
3325 int qeth_query_switch_attributes(struct qeth_card *card,
3326                                  struct qeth_switch_info *sw_info)
3327 {
3328         struct qeth_cmd_buffer *iob;
3329
3330         QETH_CARD_TEXT(card, 2, "qswiattr");
3331         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES))
3332                 return -EOPNOTSUPP;
3333         if (!netif_carrier_ok(card->dev))
3334                 return -ENOMEDIUM;
3335         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES, 0);
3336         if (!iob)
3337                 return -ENOMEM;
3338         return qeth_send_ipa_cmd(card, iob,
3339                                 qeth_query_switch_attributes_cb, sw_info);
3340 }
3341
3342 struct qeth_cmd_buffer *qeth_get_diag_cmd(struct qeth_card *card,
3343                                           enum qeth_diags_cmds sub_cmd,
3344                                           unsigned int data_length)
3345 {
3346         struct qeth_ipacmd_diagass *cmd;
3347         struct qeth_cmd_buffer *iob;
3348
3349         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SET_DIAG_ASS, QETH_PROT_NONE,
3350                                  DIAG_HDR_LEN + data_length);
3351         if (!iob)
3352                 return NULL;
3353
3354         cmd = &__ipa_cmd(iob)->data.diagass;
3355         cmd->subcmd_len = DIAG_SUB_HDR_LEN + data_length;
3356         cmd->subcmd = sub_cmd;
3357         return iob;
3358 }
3359 EXPORT_SYMBOL_GPL(qeth_get_diag_cmd);
3360
3361 static int qeth_query_setdiagass_cb(struct qeth_card *card,
3362                 struct qeth_reply *reply, unsigned long data)
3363 {
3364         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3365         u16 rc = cmd->hdr.return_code;
3366
3367         if (rc) {
3368                 QETH_CARD_TEXT_(card, 2, "diagq:%x", rc);
3369                 return -EIO;
3370         }
3371
3372         card->info.diagass_support = cmd->data.diagass.ext;
3373         return 0;
3374 }
3375
3376 static int qeth_query_setdiagass(struct qeth_card *card)
3377 {
3378         struct qeth_cmd_buffer *iob;
3379
3380         QETH_CARD_TEXT(card, 2, "qdiagass");
3381         iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_QUERY, 0);
3382         if (!iob)
3383                 return -ENOMEM;
3384         return qeth_send_ipa_cmd(card, iob, qeth_query_setdiagass_cb, NULL);
3385 }
3386
3387 static void qeth_get_trap_id(struct qeth_card *card, struct qeth_trap_id *tid)
3388 {
3389         unsigned long info = get_zeroed_page(GFP_KERNEL);
3390         struct sysinfo_2_2_2 *info222 = (struct sysinfo_2_2_2 *)info;
3391         struct sysinfo_3_2_2 *info322 = (struct sysinfo_3_2_2 *)info;
3392         struct ccw_dev_id ccwid;
3393         int level;
3394
3395         tid->chpid = card->info.chpid;
3396         ccw_device_get_id(CARD_RDEV(card), &ccwid);
3397         tid->ssid = ccwid.ssid;
3398         tid->devno = ccwid.devno;
3399         if (!info)
3400                 return;
3401         level = stsi(NULL, 0, 0, 0);
3402         if ((level >= 2) && (stsi(info222, 2, 2, 2) == 0))
3403                 tid->lparnr = info222->lpar_number;
3404         if ((level >= 3) && (stsi(info322, 3, 2, 2) == 0)) {
3405                 EBCASC(info322->vm[0].name, sizeof(info322->vm[0].name));
3406                 memcpy(tid->vmname, info322->vm[0].name, sizeof(tid->vmname));
3407         }
3408         free_page(info);
3409 }
3410
3411 static int qeth_hw_trap_cb(struct qeth_card *card,
3412                 struct qeth_reply *reply, unsigned long data)
3413 {
3414         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3415         u16 rc = cmd->hdr.return_code;
3416
3417         if (rc) {
3418                 QETH_CARD_TEXT_(card, 2, "trapc:%x", rc);
3419                 return -EIO;
3420         }
3421         return 0;
3422 }
3423
3424 int qeth_hw_trap(struct qeth_card *card, enum qeth_diags_trap_action action)
3425 {
3426         struct qeth_cmd_buffer *iob;
3427         struct qeth_ipa_cmd *cmd;
3428
3429         QETH_CARD_TEXT(card, 2, "diagtrap");
3430         iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_TRAP, 64);
3431         if (!iob)
3432                 return -ENOMEM;
3433         cmd = __ipa_cmd(iob);
3434         cmd->data.diagass.type = 1;
3435         cmd->data.diagass.action = action;
3436         switch (action) {
3437         case QETH_DIAGS_TRAP_ARM:
3438                 cmd->data.diagass.options = 0x0003;
3439                 cmd->data.diagass.ext = 0x00010000 +
3440                         sizeof(struct qeth_trap_id);
3441                 qeth_get_trap_id(card,
3442                         (struct qeth_trap_id *)cmd->data.diagass.cdata);
3443                 break;
3444         case QETH_DIAGS_TRAP_DISARM:
3445                 cmd->data.diagass.options = 0x0001;
3446                 break;
3447         case QETH_DIAGS_TRAP_CAPTURE:
3448                 break;
3449         }
3450         return qeth_send_ipa_cmd(card, iob, qeth_hw_trap_cb, NULL);
3451 }
3452
3453 static int qeth_check_qdio_errors(struct qeth_card *card,
3454                                   struct qdio_buffer *buf,
3455                                   unsigned int qdio_error,
3456                                   const char *dbftext)
3457 {
3458         if (qdio_error) {
3459                 QETH_CARD_TEXT(card, 2, dbftext);
3460                 QETH_CARD_TEXT_(card, 2, " F15=%02X",
3461                                buf->element[15].sflags);
3462                 QETH_CARD_TEXT_(card, 2, " F14=%02X",
3463                                buf->element[14].sflags);
3464                 QETH_CARD_TEXT_(card, 2, " qerr=%X", qdio_error);
3465                 if ((buf->element[15].sflags) == 0x12) {
3466                         QETH_CARD_STAT_INC(card, rx_fifo_errors);
3467                         return 0;
3468                 } else
3469                         return 1;
3470         }
3471         return 0;
3472 }
3473
3474 static unsigned int qeth_rx_refill_queue(struct qeth_card *card,
3475                                          unsigned int count)
3476 {
3477         struct qeth_qdio_q *queue = card->qdio.in_q;
3478         struct list_head *lh;
3479         int i;
3480         int rc;
3481         int newcount = 0;
3482
3483         /* only requeue at a certain threshold to avoid SIGAs */
3484         if (count >= QETH_IN_BUF_REQUEUE_THRESHOLD(card)) {
3485                 for (i = queue->next_buf_to_init;
3486                      i < queue->next_buf_to_init + count; ++i) {
3487                         if (qeth_init_input_buffer(card,
3488                                 &queue->bufs[QDIO_BUFNR(i)])) {
3489                                 break;
3490                         } else {
3491                                 newcount++;
3492                         }
3493                 }
3494
3495                 if (newcount < count) {
3496                         /* we are in memory shortage so we switch back to
3497                            traditional skb allocation and drop packages */
3498                         atomic_set(&card->force_alloc_skb, 3);
3499                         count = newcount;
3500                 } else {
3501                         atomic_add_unless(&card->force_alloc_skb, -1, 0);
3502                 }
3503
3504                 if (!count) {
3505                         i = 0;
3506                         list_for_each(lh, &card->qdio.in_buf_pool.entry_list)
3507                                 i++;
3508                         if (i == card->qdio.in_buf_pool.buf_count) {
3509                                 QETH_CARD_TEXT(card, 2, "qsarbw");
3510                                 schedule_delayed_work(
3511                                         &card->buffer_reclaim_work,
3512                                         QETH_RECLAIM_WORK_TIME);
3513                         }
3514                         return 0;
3515                 }
3516
3517                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0,
3518                              queue->next_buf_to_init, count);
3519                 if (rc) {
3520                         QETH_CARD_TEXT(card, 2, "qinberr");
3521                 }
3522                 queue->next_buf_to_init = QDIO_BUFNR(queue->next_buf_to_init +
3523                                                      count);
3524                 return count;
3525         }
3526
3527         return 0;
3528 }
3529
3530 static void qeth_buffer_reclaim_work(struct work_struct *work)
3531 {
3532         struct qeth_card *card = container_of(to_delayed_work(work),
3533                                               struct qeth_card,
3534                                               buffer_reclaim_work);
3535
3536         local_bh_disable();
3537         napi_schedule(&card->napi);
3538         /* kick-start the NAPI softirq: */
3539         local_bh_enable();
3540 }
3541
3542 static void qeth_handle_send_error(struct qeth_card *card,
3543                 struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err)
3544 {
3545         int sbalf15 = buffer->buffer->element[15].sflags;
3546
3547         QETH_CARD_TEXT(card, 6, "hdsnderr");
3548         qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr");
3549
3550         if (!qdio_err)
3551                 return;
3552
3553         if ((sbalf15 >= 15) && (sbalf15 <= 31))
3554                 return;
3555
3556         QETH_CARD_TEXT(card, 1, "lnkfail");
3557         QETH_CARD_TEXT_(card, 1, "%04x %02x",
3558                        (u16)qdio_err, (u8)sbalf15);
3559 }
3560
3561 /**
3562  * qeth_prep_flush_pack_buffer - Prepares flushing of a packing buffer.
3563  * @queue: queue to check for packing buffer
3564  *
3565  * Returns number of buffers that were prepared for flush.
3566  */
3567 static int qeth_prep_flush_pack_buffer(struct qeth_qdio_out_q *queue)
3568 {
3569         struct qeth_qdio_out_buffer *buffer;
3570
3571         buffer = queue->bufs[queue->next_buf_to_fill];
3572         if ((atomic_read(&buffer->state) == QETH_QDIO_BUF_EMPTY) &&
3573             (buffer->next_element_to_fill > 0)) {
3574                 /* it's a packing buffer */
3575                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3576                 queue->next_buf_to_fill =
3577                         QDIO_BUFNR(queue->next_buf_to_fill + 1);
3578                 return 1;
3579         }
3580         return 0;
3581 }
3582
3583 /*
3584  * Switched to packing state if the number of used buffers on a queue
3585  * reaches a certain limit.
3586  */
3587 static void qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q *queue)
3588 {
3589         if (!queue->do_pack) {
3590                 if (atomic_read(&queue->used_buffers)
3591                     >= QETH_HIGH_WATERMARK_PACK){
3592                         /* switch non-PACKING -> PACKING */
3593                         QETH_CARD_TEXT(queue->card, 6, "np->pack");
3594                         QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3595                         queue->do_pack = 1;
3596                 }
3597         }
3598 }
3599
3600 /*
3601  * Switches from packing to non-packing mode. If there is a packing
3602  * buffer on the queue this buffer will be prepared to be flushed.
3603  * In that case 1 is returned to inform the caller. If no buffer
3604  * has to be flushed, zero is returned.
3605  */
3606 static int qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q *queue)
3607 {
3608         if (queue->do_pack) {
3609                 if (atomic_read(&queue->used_buffers)
3610                     <= QETH_LOW_WATERMARK_PACK) {
3611                         /* switch PACKING -> non-PACKING */
3612                         QETH_CARD_TEXT(queue->card, 6, "pack->np");
3613                         QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3614                         queue->do_pack = 0;
3615                         return qeth_prep_flush_pack_buffer(queue);
3616                 }
3617         }
3618         return 0;
3619 }
3620
3621 static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
3622                                int count)
3623 {
3624         struct qeth_qdio_out_buffer *buf = queue->bufs[index];
3625         unsigned int qdio_flags = QDIO_FLAG_SYNC_OUTPUT;
3626         struct qeth_card *card = queue->card;
3627         int rc;
3628         int i;
3629
3630         for (i = index; i < index + count; ++i) {
3631                 unsigned int bidx = QDIO_BUFNR(i);
3632                 struct sk_buff *skb;
3633
3634                 buf = queue->bufs[bidx];
3635                 buf->buffer->element[buf->next_element_to_fill - 1].eflags |=
3636                                 SBAL_EFLAGS_LAST_ENTRY;
3637                 queue->coalesced_frames += buf->frames;
3638
3639                 if (queue->bufstates)
3640                         queue->bufstates[bidx].user = buf;
3641
3642                 if (IS_IQD(card)) {
3643                         skb_queue_walk(&buf->skb_list, skb)
3644                                 skb_tx_timestamp(skb);
3645                 }
3646         }
3647
3648         if (!IS_IQD(card)) {
3649                 if (!queue->do_pack) {
3650                         if ((atomic_read(&queue->used_buffers) >=
3651                                 (QETH_HIGH_WATERMARK_PACK -
3652                                  QETH_WATERMARK_PACK_FUZZ)) &&
3653                             !atomic_read(&queue->set_pci_flags_count)) {
3654                                 /* it's likely that we'll go to packing
3655                                  * mode soon */
3656                                 atomic_inc(&queue->set_pci_flags_count);
3657                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3658                         }
3659                 } else {
3660                         if (!atomic_read(&queue->set_pci_flags_count)) {
3661                                 /*
3662                                  * there's no outstanding PCI any more, so we
3663                                  * have to request a PCI to be sure the the PCI
3664                                  * will wake at some time in the future then we
3665                                  * can flush packed buffers that might still be
3666                                  * hanging around, which can happen if no
3667                                  * further send was requested by the stack
3668                                  */
3669                                 atomic_inc(&queue->set_pci_flags_count);
3670                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3671                         }
3672                 }
3673
3674                 if (atomic_read(&queue->set_pci_flags_count))
3675                         qdio_flags |= QDIO_FLAG_PCI_OUT;
3676         }
3677
3678         QETH_TXQ_STAT_INC(queue, doorbell);
3679         rc = do_QDIO(CARD_DDEV(queue->card), qdio_flags,
3680                      queue->queue_no, index, count);
3681
3682         /* Fake the TX completion interrupt: */
3683         if (IS_IQD(card)) {
3684                 unsigned int frames = READ_ONCE(queue->max_coalesced_frames);
3685                 unsigned int usecs = READ_ONCE(queue->coalesce_usecs);
3686
3687                 if (frames && queue->coalesced_frames >= frames) {
3688                         napi_schedule(&queue->napi);
3689                         queue->coalesced_frames = 0;
3690                         QETH_TXQ_STAT_INC(queue, coal_frames);
3691                 } else if (usecs) {
3692                         qeth_tx_arm_timer(queue, usecs);
3693                 }
3694         }
3695
3696         if (rc) {
3697                 /* ignore temporary SIGA errors without busy condition */
3698                 if (rc == -ENOBUFS)
3699                         return;
3700                 QETH_CARD_TEXT(queue->card, 2, "flushbuf");
3701                 QETH_CARD_TEXT_(queue->card, 2, " q%d", queue->queue_no);
3702                 QETH_CARD_TEXT_(queue->card, 2, " idx%d", index);
3703                 QETH_CARD_TEXT_(queue->card, 2, " c%d", count);
3704                 QETH_CARD_TEXT_(queue->card, 2, " err%d", rc);
3705
3706                 /* this must not happen under normal circumstances. if it
3707                  * happens something is really wrong -> recover */
3708                 qeth_schedule_recovery(queue->card);
3709                 return;
3710         }
3711 }
3712
3713 static void qeth_flush_queue(struct qeth_qdio_out_q *queue)
3714 {
3715         qeth_flush_buffers(queue, queue->bulk_start, queue->bulk_count);
3716
3717         queue->bulk_start = QDIO_BUFNR(queue->bulk_start + queue->bulk_count);
3718         queue->prev_hdr = NULL;
3719         queue->bulk_count = 0;
3720 }
3721
3722 static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue)
3723 {
3724         /*
3725          * check if weed have to switch to non-packing mode or if
3726          * we have to get a pci flag out on the queue
3727          */
3728         if ((atomic_read(&queue->used_buffers) <= QETH_LOW_WATERMARK_PACK) ||
3729             !atomic_read(&queue->set_pci_flags_count)) {
3730                 unsigned int index, flush_cnt;
3731                 bool q_was_packing;
3732
3733                 spin_lock(&queue->lock);
3734
3735                 index = queue->next_buf_to_fill;
3736                 q_was_packing = queue->do_pack;
3737
3738                 flush_cnt = qeth_switch_to_nonpacking_if_needed(queue);
3739                 if (!flush_cnt && !atomic_read(&queue->set_pci_flags_count))
3740                         flush_cnt = qeth_prep_flush_pack_buffer(queue);
3741
3742                 if (flush_cnt) {
3743                         qeth_flush_buffers(queue, index, flush_cnt);
3744                         if (q_was_packing)
3745                                 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_cnt);
3746                 }
3747
3748                 spin_unlock(&queue->lock);
3749         }
3750 }
3751
3752 static void qeth_qdio_poll(struct ccw_device *cdev, unsigned long card_ptr)
3753 {
3754         struct qeth_card *card = (struct qeth_card *)card_ptr;
3755
3756         napi_schedule_irqoff(&card->napi);
3757 }
3758
3759 int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq)
3760 {
3761         int rc;
3762
3763         if (card->options.cq ==  QETH_CQ_NOTAVAILABLE) {
3764                 rc = -1;
3765                 goto out;
3766         } else {
3767                 if (card->options.cq == cq) {
3768                         rc = 0;
3769                         goto out;
3770                 }
3771
3772                 qeth_free_qdio_queues(card);
3773                 card->options.cq = cq;
3774                 rc = 0;
3775         }
3776 out:
3777         return rc;
3778
3779 }
3780 EXPORT_SYMBOL_GPL(qeth_configure_cq);
3781
3782 static void qeth_qdio_cq_handler(struct qeth_card *card, unsigned int qdio_err,
3783                                  unsigned int queue, int first_element,
3784                                  int count)
3785 {
3786         struct qeth_qdio_q *cq = card->qdio.c_q;
3787         int i;
3788         int rc;
3789
3790         QETH_CARD_TEXT_(card, 5, "qcqhe%d", first_element);
3791         QETH_CARD_TEXT_(card, 5, "qcqhc%d", count);
3792         QETH_CARD_TEXT_(card, 5, "qcqherr%d", qdio_err);
3793
3794         if (qdio_err) {
3795                 netif_tx_stop_all_queues(card->dev);
3796                 qeth_schedule_recovery(card);
3797                 return;
3798         }
3799
3800         for (i = first_element; i < first_element + count; ++i) {
3801                 struct qdio_buffer *buffer = cq->qdio_bufs[QDIO_BUFNR(i)];
3802                 int e = 0;
3803
3804                 while ((e < QDIO_MAX_ELEMENTS_PER_BUFFER) &&
3805                        buffer->element[e].addr) {
3806                         unsigned long phys_aob_addr = buffer->element[e].addr;
3807
3808                         qeth_qdio_handle_aob(card, phys_aob_addr);
3809                         ++e;
3810                 }
3811                 qeth_scrub_qdio_buffer(buffer, QDIO_MAX_ELEMENTS_PER_BUFFER);
3812         }
3813         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, queue,
3814                     card->qdio.c_q->next_buf_to_init,
3815                     count);
3816         if (rc) {
3817                 dev_warn(&card->gdev->dev,
3818                         "QDIO reported an error, rc=%i\n", rc);
3819                 QETH_CARD_TEXT(card, 2, "qcqherr");
3820         }
3821
3822         cq->next_buf_to_init = QDIO_BUFNR(cq->next_buf_to_init + count);
3823 }
3824
3825 static void qeth_qdio_input_handler(struct ccw_device *ccwdev,
3826                                     unsigned int qdio_err, int queue,
3827                                     int first_elem, int count,
3828                                     unsigned long card_ptr)
3829 {
3830         struct qeth_card *card = (struct qeth_card *)card_ptr;
3831
3832         QETH_CARD_TEXT_(card, 2, "qihq%d", queue);
3833         QETH_CARD_TEXT_(card, 2, "qiec%d", qdio_err);
3834
3835         if (qdio_err)
3836                 qeth_schedule_recovery(card);
3837 }
3838
3839 static void qeth_qdio_output_handler(struct ccw_device *ccwdev,
3840                                      unsigned int qdio_error, int __queue,
3841                                      int first_element, int count,
3842                                      unsigned long card_ptr)
3843 {
3844         struct qeth_card *card        = (struct qeth_card *) card_ptr;
3845         struct qeth_qdio_out_q *queue = card->qdio.out_qs[__queue];
3846         struct net_device *dev = card->dev;
3847         struct netdev_queue *txq;
3848         int i;
3849
3850         QETH_CARD_TEXT(card, 6, "qdouhdl");
3851         if (qdio_error & QDIO_ERROR_FATAL) {
3852                 QETH_CARD_TEXT(card, 2, "achkcond");
3853                 netif_tx_stop_all_queues(dev);
3854                 qeth_schedule_recovery(card);
3855                 return;
3856         }
3857
3858         for (i = first_element; i < (first_element + count); ++i) {
3859                 struct qeth_qdio_out_buffer *buf = queue->bufs[QDIO_BUFNR(i)];
3860
3861                 qeth_handle_send_error(card, buf, qdio_error);
3862                 qeth_clear_output_buffer(queue, buf, qdio_error, 0);
3863         }
3864
3865         atomic_sub(count, &queue->used_buffers);
3866         qeth_check_outbound_queue(queue);
3867
3868         txq = netdev_get_tx_queue(dev, __queue);
3869         /* xmit may have observed the full-condition, but not yet stopped the
3870          * txq. In which case the code below won't trigger. So before returning,
3871          * xmit will re-check the txq's fill level and wake it up if needed.
3872          */
3873         if (netif_tx_queue_stopped(txq) && !qeth_out_queue_is_full(queue))
3874                 netif_tx_wake_queue(txq);
3875 }
3876
3877 /**
3878  * Note: Function assumes that we have 4 outbound queues.
3879  */
3880 int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb)
3881 {
3882         struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
3883         u8 tos;
3884
3885         switch (card->qdio.do_prio_queueing) {
3886         case QETH_PRIO_Q_ING_TOS:
3887         case QETH_PRIO_Q_ING_PREC:
3888                 switch (qeth_get_ip_version(skb)) {
3889                 case 4:
3890                         tos = ipv4_get_dsfield(ip_hdr(skb));
3891                         break;
3892                 case 6:
3893                         tos = ipv6_get_dsfield(ipv6_hdr(skb));
3894                         break;
3895                 default:
3896                         return card->qdio.default_out_queue;
3897                 }
3898                 if (card->qdio.do_prio_queueing == QETH_PRIO_Q_ING_PREC)
3899                         return ~tos >> 6 & 3;
3900                 if (tos & IPTOS_MINCOST)
3901                         return 3;
3902                 if (tos & IPTOS_RELIABILITY)
3903                         return 2;
3904                 if (tos & IPTOS_THROUGHPUT)
3905                         return 1;
3906                 if (tos & IPTOS_LOWDELAY)
3907                         return 0;
3908                 break;
3909         case QETH_PRIO_Q_ING_SKB:
3910                 if (skb->priority > 5)
3911                         return 0;
3912                 return ~skb->priority >> 1 & 3;
3913         case QETH_PRIO_Q_ING_VLAN:
3914                 if (veth->h_vlan_proto == htons(ETH_P_8021Q))
3915                         return ~ntohs(veth->h_vlan_TCI) >>
3916                                (VLAN_PRIO_SHIFT + 1) & 3;
3917                 break;
3918         case QETH_PRIO_Q_ING_FIXED:
3919                 return card->qdio.default_out_queue;
3920         default:
3921                 break;
3922         }
3923         return card->qdio.default_out_queue;
3924 }
3925 EXPORT_SYMBOL_GPL(qeth_get_priority_queue);
3926
3927 /**
3928  * qeth_get_elements_for_frags() -      find number of SBALEs for skb frags.
3929  * @skb:                                SKB address
3930  *
3931  * Returns the number of pages, and thus QDIO buffer elements, needed to cover
3932  * fragmented part of the SKB. Returns zero for linear SKB.
3933  */
3934 static int qeth_get_elements_for_frags(struct sk_buff *skb)
3935 {
3936         int cnt, elements = 0;
3937
3938         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3939                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
3940
3941                 elements += qeth_get_elements_for_range(
3942                         (addr_t)skb_frag_address(frag),
3943                         (addr_t)skb_frag_address(frag) + skb_frag_size(frag));
3944         }
3945         return elements;
3946 }
3947
3948 /**
3949  * qeth_count_elements() -      Counts the number of QDIO buffer elements needed
3950  *                              to transmit an skb.
3951  * @skb:                        the skb to operate on.
3952  * @data_offset:                skip this part of the skb's linear data
3953  *
3954  * Returns the number of pages, and thus QDIO buffer elements, needed to map the
3955  * skb's data (both its linear part and paged fragments).
3956  */
3957 unsigned int qeth_count_elements(struct sk_buff *skb, unsigned int data_offset)
3958 {
3959         unsigned int elements = qeth_get_elements_for_frags(skb);
3960         addr_t end = (addr_t)skb->data + skb_headlen(skb);
3961         addr_t start = (addr_t)skb->data + data_offset;
3962
3963         if (start != end)
3964                 elements += qeth_get_elements_for_range(start, end);
3965         return elements;
3966 }
3967 EXPORT_SYMBOL_GPL(qeth_count_elements);
3968
3969 #define QETH_HDR_CACHE_OBJ_SIZE         (sizeof(struct qeth_hdr_tso) + \
3970                                          MAX_TCP_HEADER)
3971
3972 /**
3973  * qeth_add_hw_header() - add a HW header to an skb.
3974  * @skb: skb that the HW header should be added to.
3975  * @hdr: double pointer to a qeth_hdr. When returning with >= 0,
3976  *       it contains a valid pointer to a qeth_hdr.
3977  * @hdr_len: length of the HW header.
3978  * @proto_len: length of protocol headers that need to be in same page as the
3979  *             HW header.
3980  *
3981  * Returns the pushed length. If the header can't be pushed on
3982  * (eg. because it would cross a page boundary), it is allocated from
3983  * the cache instead and 0 is returned.
3984  * The number of needed buffer elements is returned in @elements.
3985  * Error to create the hdr is indicated by returning with < 0.
3986  */
3987 static int qeth_add_hw_header(struct qeth_qdio_out_q *queue,
3988                               struct sk_buff *skb, struct qeth_hdr **hdr,
3989                               unsigned int hdr_len, unsigned int proto_len,
3990                               unsigned int *elements)
3991 {
3992         gfp_t gfp = GFP_ATOMIC | (skb_pfmemalloc(skb) ? __GFP_MEMALLOC : 0);
3993         const unsigned int contiguous = proto_len ? proto_len : 1;
3994         const unsigned int max_elements = queue->max_elements;
3995         unsigned int __elements;
3996         addr_t start, end;
3997         bool push_ok;
3998         int rc;
3999
4000 check_layout:
4001         start = (addr_t)skb->data - hdr_len;
4002         end = (addr_t)skb->data;
4003
4004         if (qeth_get_elements_for_range(start, end + contiguous) == 1) {
4005                 /* Push HW header into same page as first protocol header. */
4006                 push_ok = true;
4007                 /* ... but TSO always needs a separate element for headers: */
4008                 if (skb_is_gso(skb))
4009                         __elements = 1 + qeth_count_elements(skb, proto_len);
4010                 else
4011                         __elements = qeth_count_elements(skb, 0);
4012         } else if (!proto_len && PAGE_ALIGNED(skb->data)) {
4013                 /* Push HW header into preceding page, flush with skb->data. */
4014                 push_ok = true;
4015                 __elements = 1 + qeth_count_elements(skb, 0);
4016         } else {
4017                 /* Use header cache, copy protocol headers up. */
4018                 push_ok = false;
4019                 __elements = 1 + qeth_count_elements(skb, proto_len);
4020         }
4021
4022         /* Compress skb to fit into one IO buffer: */
4023         if (__elements > max_elements) {
4024                 if (!skb_is_nonlinear(skb)) {
4025                         /* Drop it, no easy way of shrinking it further. */
4026                         QETH_DBF_MESSAGE(2, "Dropped an oversized skb (Max Elements=%u / Actual=%u / Length=%u).\n",
4027                                          max_elements, __elements, skb->len);
4028                         return -E2BIG;
4029                 }
4030
4031                 rc = skb_linearize(skb);
4032                 if (rc) {
4033                         QETH_TXQ_STAT_INC(queue, skbs_linearized_fail);
4034                         return rc;
4035                 }
4036
4037                 QETH_TXQ_STAT_INC(queue, skbs_linearized);
4038                 /* Linearization changed the layout, re-evaluate: */
4039                 goto check_layout;
4040         }
4041
4042         *elements = __elements;
4043         /* Add the header: */
4044         if (push_ok) {
4045                 *hdr = skb_push(skb, hdr_len);
4046                 return hdr_len;
4047         }
4048
4049         /* Fall back to cache element with known-good alignment: */
4050         if (hdr_len + proto_len > QETH_HDR_CACHE_OBJ_SIZE)
4051                 return -E2BIG;
4052         *hdr = kmem_cache_alloc(qeth_core_header_cache, gfp);
4053         if (!*hdr)
4054                 return -ENOMEM;
4055         /* Copy protocol headers behind HW header: */
4056         skb_copy_from_linear_data(skb, ((char *)*hdr) + hdr_len, proto_len);
4057         return 0;
4058 }
4059
4060 static bool qeth_iqd_may_bulk(struct qeth_qdio_out_q *queue,
4061                               struct sk_buff *curr_skb,
4062                               struct qeth_hdr *curr_hdr)
4063 {
4064         struct qeth_qdio_out_buffer *buffer = queue->bufs[queue->bulk_start];
4065         struct qeth_hdr *prev_hdr = queue->prev_hdr;
4066
4067         if (!prev_hdr)
4068                 return true;
4069
4070         /* All packets must have the same target: */
4071         if (curr_hdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER2) {
4072                 struct sk_buff *prev_skb = skb_peek(&buffer->skb_list);
4073
4074                 return ether_addr_equal(eth_hdr(prev_skb)->h_dest,
4075                                         eth_hdr(curr_skb)->h_dest) &&
4076                        qeth_l2_same_vlan(&prev_hdr->hdr.l2, &curr_hdr->hdr.l2);
4077         }
4078
4079         return qeth_l3_same_next_hop(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3) &&
4080                qeth_l3_iqd_same_vlan(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3);
4081 }
4082
4083 /**
4084  * qeth_fill_buffer() - map skb into an output buffer
4085  * @buf:        buffer to transport the skb
4086  * @skb:        skb to map into the buffer
4087  * @hdr:        qeth_hdr for this skb. Either at skb->data, or allocated
4088  *              from qeth_core_header_cache.
4089  * @offset:     when mapping the skb, start at skb->data + offset
4090  * @hd_len:     if > 0, build a dedicated header element of this size
4091  */
4092 static unsigned int qeth_fill_buffer(struct qeth_qdio_out_buffer *buf,
4093                                      struct sk_buff *skb, struct qeth_hdr *hdr,
4094                                      unsigned int offset, unsigned int hd_len)
4095 {
4096         struct qdio_buffer *buffer = buf->buffer;
4097         int element = buf->next_element_to_fill;
4098         int length = skb_headlen(skb) - offset;
4099         char *data = skb->data + offset;
4100         unsigned int elem_length, cnt;
4101         bool is_first_elem = true;
4102
4103         __skb_queue_tail(&buf->skb_list, skb);
4104
4105         /* build dedicated element for HW Header */
4106         if (hd_len) {
4107                 is_first_elem = false;
4108
4109                 buffer->element[element].addr = virt_to_phys(hdr);
4110                 buffer->element[element].length = hd_len;
4111                 buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
4112
4113                 /* HW header is allocated from cache: */
4114                 if ((void *)hdr != skb->data)
4115                         buf->is_header[element] = 1;
4116                 /* HW header was pushed and is contiguous with linear part: */
4117                 else if (length > 0 && !PAGE_ALIGNED(data) &&
4118                          (data == (char *)hdr + hd_len))
4119                         buffer->element[element].eflags |=
4120                                 SBAL_EFLAGS_CONTIGUOUS;
4121
4122                 element++;
4123         }
4124
4125         /* map linear part into buffer element(s) */
4126         while (length > 0) {
4127                 elem_length = min_t(unsigned int, length,
4128                                     PAGE_SIZE - offset_in_page(data));
4129
4130                 buffer->element[element].addr = virt_to_phys(data);
4131                 buffer->element[element].length = elem_length;
4132                 length -= elem_length;
4133                 if (is_first_elem) {
4134                         is_first_elem = false;
4135                         if (length || skb_is_nonlinear(skb))
4136                                 /* skb needs additional elements */
4137                                 buffer->element[element].eflags =
4138                                         SBAL_EFLAGS_FIRST_FRAG;
4139                         else
4140                                 buffer->element[element].eflags = 0;
4141                 } else {
4142                         buffer->element[element].eflags =
4143                                 SBAL_EFLAGS_MIDDLE_FRAG;
4144                 }
4145
4146                 data += elem_length;
4147                 element++;
4148         }
4149
4150         /* map page frags into buffer element(s) */
4151         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
4152                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
4153
4154                 data = skb_frag_address(frag);
4155                 length = skb_frag_size(frag);
4156                 while (length > 0) {
4157                         elem_length = min_t(unsigned int, length,
4158                                             PAGE_SIZE - offset_in_page(data));
4159
4160                         buffer->element[element].addr = virt_to_phys(data);
4161                         buffer->element[element].length = elem_length;
4162                         buffer->element[element].eflags =
4163                                 SBAL_EFLAGS_MIDDLE_FRAG;
4164
4165                         length -= elem_length;
4166                         data += elem_length;
4167                         element++;
4168                 }
4169         }
4170
4171         if (buffer->element[element - 1].eflags)
4172                 buffer->element[element - 1].eflags = SBAL_EFLAGS_LAST_FRAG;
4173         buf->next_element_to_fill = element;
4174         return element;
4175 }
4176
4177 static int __qeth_xmit(struct qeth_card *card, struct qeth_qdio_out_q *queue,
4178                        struct sk_buff *skb, unsigned int elements,
4179                        struct qeth_hdr *hdr, unsigned int offset,
4180                        unsigned int hd_len)
4181 {
4182         unsigned int bytes = qdisc_pkt_len(skb);
4183         struct qeth_qdio_out_buffer *buffer;
4184         unsigned int next_element;
4185         struct netdev_queue *txq;
4186         bool stopped = false;
4187         bool flush;
4188
4189         buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start + queue->bulk_count)];
4190         txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
4191
4192         /* Just a sanity check, the wake/stop logic should ensure that we always
4193          * get a free buffer.
4194          */
4195         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4196                 return -EBUSY;
4197
4198         flush = !qeth_iqd_may_bulk(queue, skb, hdr);
4199
4200         if (flush ||
4201             (buffer->next_element_to_fill + elements > queue->max_elements)) {
4202                 if (buffer->next_element_to_fill > 0) {
4203                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4204                         queue->bulk_count++;
4205                 }
4206
4207                 if (queue->bulk_count >= queue->bulk_max)
4208                         flush = true;
4209
4210                 if (flush)
4211                         qeth_flush_queue(queue);
4212
4213                 buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start +
4214                                                 queue->bulk_count)];
4215
4216                 /* Sanity-check again: */
4217                 if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4218                         return -EBUSY;
4219         }
4220
4221         if (buffer->next_element_to_fill == 0 &&
4222             atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
4223                 /* If a TX completion happens right _here_ and misses to wake
4224                  * the txq, then our re-check below will catch the race.
4225                  */
4226                 QETH_TXQ_STAT_INC(queue, stopped);
4227                 netif_tx_stop_queue(txq);
4228                 stopped = true;
4229         }
4230
4231         next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
4232         buffer->bytes += bytes;
4233         buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
4234         queue->prev_hdr = hdr;
4235
4236         flush = __netdev_tx_sent_queue(txq, bytes,
4237                                        !stopped && netdev_xmit_more());
4238
4239         if (flush || next_element >= queue->max_elements) {
4240                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4241                 queue->bulk_count++;
4242
4243                 if (queue->bulk_count >= queue->bulk_max)
4244                         flush = true;
4245
4246                 if (flush)
4247                         qeth_flush_queue(queue);
4248         }
4249
4250         if (stopped && !qeth_out_queue_is_full(queue))
4251                 netif_tx_start_queue(txq);
4252         return 0;
4253 }
4254
4255 int qeth_do_send_packet(struct qeth_card *card, struct qeth_qdio_out_q *queue,
4256                         struct sk_buff *skb, struct qeth_hdr *hdr,
4257                         unsigned int offset, unsigned int hd_len,
4258                         int elements_needed)
4259 {
4260         unsigned int start_index = queue->next_buf_to_fill;
4261         struct qeth_qdio_out_buffer *buffer;
4262         unsigned int next_element;
4263         struct netdev_queue *txq;
4264         bool stopped = false;
4265         int flush_count = 0;
4266         int do_pack = 0;
4267         int rc = 0;
4268
4269         buffer = queue->bufs[queue->next_buf_to_fill];
4270
4271         /* Just a sanity check, the wake/stop logic should ensure that we always
4272          * get a free buffer.
4273          */
4274         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4275                 return -EBUSY;
4276
4277         txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
4278
4279         /* check if we need to switch packing state of this queue */
4280         qeth_switch_to_packing_if_needed(queue);
4281         if (queue->do_pack) {
4282                 do_pack = 1;
4283                 /* does packet fit in current buffer? */
4284                 if (buffer->next_element_to_fill + elements_needed >
4285                     queue->max_elements) {
4286                         /* ... no -> set state PRIMED */
4287                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4288                         flush_count++;
4289                         queue->next_buf_to_fill =
4290                                 QDIO_BUFNR(queue->next_buf_to_fill + 1);
4291                         buffer = queue->bufs[queue->next_buf_to_fill];
4292
4293                         /* We stepped forward, so sanity-check again: */
4294                         if (atomic_read(&buffer->state) !=
4295                             QETH_QDIO_BUF_EMPTY) {
4296                                 qeth_flush_buffers(queue, start_index,
4297                                                            flush_count);
4298                                 rc = -EBUSY;
4299                                 goto out;
4300                         }
4301                 }
4302         }
4303
4304         if (buffer->next_element_to_fill == 0 &&
4305             atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
4306                 /* If a TX completion happens right _here_ and misses to wake
4307                  * the txq, then our re-check below will catch the race.
4308                  */
4309                 QETH_TXQ_STAT_INC(queue, stopped);
4310                 netif_tx_stop_queue(txq);
4311                 stopped = true;
4312         }
4313
4314         next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
4315         buffer->bytes += qdisc_pkt_len(skb);
4316         buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
4317
4318         if (queue->do_pack)
4319                 QETH_TXQ_STAT_INC(queue, skbs_pack);
4320         if (!queue->do_pack || stopped || next_element >= queue->max_elements) {
4321                 flush_count++;
4322                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4323                 queue->next_buf_to_fill =
4324                                 QDIO_BUFNR(queue->next_buf_to_fill + 1);
4325         }
4326
4327         if (flush_count)
4328                 qeth_flush_buffers(queue, start_index, flush_count);
4329
4330 out:
4331         if (do_pack)
4332                 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_count);
4333
4334         if (stopped && !qeth_out_queue_is_full(queue))
4335                 netif_tx_start_queue(txq);
4336         return rc;
4337 }
4338 EXPORT_SYMBOL_GPL(qeth_do_send_packet);
4339
4340 static void qeth_fill_tso_ext(struct qeth_hdr_tso *hdr,
4341                               unsigned int payload_len, struct sk_buff *skb,
4342                               unsigned int proto_len)
4343 {
4344         struct qeth_hdr_ext_tso *ext = &hdr->ext;
4345
4346         ext->hdr_tot_len = sizeof(*ext);
4347         ext->imb_hdr_no = 1;
4348         ext->hdr_type = 1;
4349         ext->hdr_version = 1;
4350         ext->hdr_len = 28;
4351         ext->payload_len = payload_len;
4352         ext->mss = skb_shinfo(skb)->gso_size;
4353         ext->dg_hdr_len = proto_len;
4354 }
4355
4356 int qeth_xmit(struct qeth_card *card, struct sk_buff *skb,
4357               struct qeth_qdio_out_q *queue, int ipv,
4358               void (*fill_header)(struct qeth_qdio_out_q *queue,
4359                                   struct qeth_hdr *hdr, struct sk_buff *skb,
4360                                   int ipv, unsigned int data_len))
4361 {
4362         unsigned int proto_len, hw_hdr_len;
4363         unsigned int frame_len = skb->len;
4364         bool is_tso = skb_is_gso(skb);
4365         unsigned int data_offset = 0;
4366         struct qeth_hdr *hdr = NULL;
4367         unsigned int hd_len = 0;
4368         unsigned int elements;
4369         int push_len, rc;
4370
4371         if (is_tso) {
4372                 hw_hdr_len = sizeof(struct qeth_hdr_tso);
4373                 proto_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
4374         } else {
4375                 hw_hdr_len = sizeof(struct qeth_hdr);
4376                 proto_len = (IS_IQD(card) && IS_LAYER2(card)) ? ETH_HLEN : 0;
4377         }
4378
4379         rc = skb_cow_head(skb, hw_hdr_len);
4380         if (rc)
4381                 return rc;
4382
4383         push_len = qeth_add_hw_header(queue, skb, &hdr, hw_hdr_len, proto_len,
4384                                       &elements);
4385         if (push_len < 0)
4386                 return push_len;
4387         if (is_tso || !push_len) {
4388                 /* HW header needs its own buffer element. */
4389                 hd_len = hw_hdr_len + proto_len;
4390                 data_offset = push_len + proto_len;
4391         }
4392         memset(hdr, 0, hw_hdr_len);
4393         fill_header(queue, hdr, skb, ipv, frame_len);
4394         if (is_tso)
4395                 qeth_fill_tso_ext((struct qeth_hdr_tso *) hdr,
4396                                   frame_len - proto_len, skb, proto_len);
4397
4398         if (IS_IQD(card)) {
4399                 rc = __qeth_xmit(card, queue, skb, elements, hdr, data_offset,
4400                                  hd_len);
4401         } else {
4402                 /* TODO: drop skb_orphan() once TX completion is fast enough */
4403                 skb_orphan(skb);
4404                 spin_lock(&queue->lock);
4405                 rc = qeth_do_send_packet(card, queue, skb, hdr, data_offset,
4406                                          hd_len, elements);
4407                 spin_unlock(&queue->lock);
4408         }
4409
4410         if (rc && !push_len)
4411                 kmem_cache_free(qeth_core_header_cache, hdr);
4412
4413         return rc;
4414 }
4415 EXPORT_SYMBOL_GPL(qeth_xmit);
4416
4417 static int qeth_setadp_promisc_mode_cb(struct qeth_card *card,
4418                 struct qeth_reply *reply, unsigned long data)
4419 {
4420         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4421         struct qeth_ipacmd_setadpparms *setparms;
4422
4423         QETH_CARD_TEXT(card, 4, "prmadpcb");
4424
4425         setparms = &(cmd->data.setadapterparms);
4426         if (qeth_setadpparms_inspect_rc(cmd)) {
4427                 QETH_CARD_TEXT_(card, 4, "prmrc%x", cmd->hdr.return_code);
4428                 setparms->data.mode = SET_PROMISC_MODE_OFF;
4429         }
4430         card->info.promisc_mode = setparms->data.mode;
4431         return (cmd->hdr.return_code) ? -EIO : 0;
4432 }
4433
4434 void qeth_setadp_promisc_mode(struct qeth_card *card, bool enable)
4435 {
4436         enum qeth_ipa_promisc_modes mode = enable ? SET_PROMISC_MODE_ON :
4437                                                     SET_PROMISC_MODE_OFF;
4438         struct qeth_cmd_buffer *iob;
4439         struct qeth_ipa_cmd *cmd;
4440
4441         QETH_CARD_TEXT(card, 4, "setprom");
4442         QETH_CARD_TEXT_(card, 4, "mode:%x", mode);
4443
4444         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE,
4445                                    SETADP_DATA_SIZEOF(mode));
4446         if (!iob)
4447                 return;
4448         cmd = __ipa_cmd(iob);
4449         cmd->data.setadapterparms.data.mode = mode;
4450         qeth_send_ipa_cmd(card, iob, qeth_setadp_promisc_mode_cb, NULL);
4451 }
4452 EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode);
4453
4454 static int qeth_setadpparms_change_macaddr_cb(struct qeth_card *card,
4455                 struct qeth_reply *reply, unsigned long data)
4456 {
4457         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4458         struct qeth_ipacmd_setadpparms *adp_cmd;
4459
4460         QETH_CARD_TEXT(card, 4, "chgmaccb");
4461         if (qeth_setadpparms_inspect_rc(cmd))
4462                 return -EIO;
4463
4464         adp_cmd = &cmd->data.setadapterparms;
4465         if (!is_valid_ether_addr(adp_cmd->data.change_addr.addr))
4466                 return -EADDRNOTAVAIL;
4467
4468         if (IS_LAYER2(card) && IS_OSD(card) && !IS_VM_NIC(card) &&
4469             !(adp_cmd->hdr.flags & QETH_SETADP_FLAGS_VIRTUAL_MAC))
4470                 return -EADDRNOTAVAIL;
4471
4472         ether_addr_copy(card->dev->dev_addr, adp_cmd->data.change_addr.addr);
4473         return 0;
4474 }
4475
4476 int qeth_setadpparms_change_macaddr(struct qeth_card *card)
4477 {
4478         int rc;
4479         struct qeth_cmd_buffer *iob;
4480         struct qeth_ipa_cmd *cmd;
4481
4482         QETH_CARD_TEXT(card, 4, "chgmac");
4483
4484         iob = qeth_get_adapter_cmd(card, IPA_SETADP_ALTER_MAC_ADDRESS,
4485                                    SETADP_DATA_SIZEOF(change_addr));
4486         if (!iob)
4487                 return -ENOMEM;
4488         cmd = __ipa_cmd(iob);
4489         cmd->data.setadapterparms.data.change_addr.cmd = CHANGE_ADDR_READ_MAC;
4490         cmd->data.setadapterparms.data.change_addr.addr_size = ETH_ALEN;
4491         ether_addr_copy(cmd->data.setadapterparms.data.change_addr.addr,
4492                         card->dev->dev_addr);
4493         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_change_macaddr_cb,
4494                                NULL);
4495         return rc;
4496 }
4497 EXPORT_SYMBOL_GPL(qeth_setadpparms_change_macaddr);
4498
4499 static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card,
4500                 struct qeth_reply *reply, unsigned long data)
4501 {
4502         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4503         struct qeth_set_access_ctrl *access_ctrl_req;
4504
4505         QETH_CARD_TEXT(card, 4, "setaccb");
4506
4507         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4508         QETH_CARD_TEXT_(card, 2, "rc=%d",
4509                         cmd->data.setadapterparms.hdr.return_code);
4510         if (cmd->data.setadapterparms.hdr.return_code !=
4511                                                 SET_ACCESS_CTRL_RC_SUCCESS)
4512                 QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%#x) on device %x: %#x\n",
4513                                  access_ctrl_req->subcmd_code, CARD_DEVID(card),
4514                                  cmd->data.setadapterparms.hdr.return_code);
4515         switch (qeth_setadpparms_inspect_rc(cmd)) {
4516         case SET_ACCESS_CTRL_RC_SUCCESS:
4517                 if (access_ctrl_req->subcmd_code == ISOLATION_MODE_NONE)
4518                         dev_info(&card->gdev->dev,
4519                             "QDIO data connection isolation is deactivated\n");
4520                 else
4521                         dev_info(&card->gdev->dev,
4522                             "QDIO data connection isolation is activated\n");
4523                 return 0;
4524         case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
4525                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already deactivated\n",
4526                                  CARD_DEVID(card));
4527                 return 0;
4528         case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
4529                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already activated\n",
4530                                  CARD_DEVID(card));
4531                 return 0;
4532         case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
4533                 dev_err(&card->gdev->dev, "Adapter does not "
4534                         "support QDIO data connection isolation\n");
4535                 return -EOPNOTSUPP;
4536         case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
4537                 dev_err(&card->gdev->dev,
4538                         "Adapter is dedicated. "
4539                         "QDIO data connection isolation not supported\n");
4540                 return -EOPNOTSUPP;
4541         case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
4542                 dev_err(&card->gdev->dev,
4543                         "TSO does not permit QDIO data connection isolation\n");
4544                 return -EPERM;
4545         case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED:
4546                 dev_err(&card->gdev->dev, "The adjacent switch port does not "
4547                         "support reflective relay mode\n");
4548                 return -EOPNOTSUPP;
4549         case SET_ACCESS_CTRL_RC_REFLREL_FAILED:
4550                 dev_err(&card->gdev->dev, "The reflective relay mode cannot be "
4551                                         "enabled at the adjacent switch port");
4552                 return -EREMOTEIO;
4553         case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED:
4554                 dev_warn(&card->gdev->dev, "Turning off reflective relay mode "
4555                                         "at the adjacent switch failed\n");
4556                 /* benign error while disabling ISOLATION_MODE_FWD */
4557                 return 0;
4558         default:
4559                 return -EIO;
4560         }
4561 }
4562
4563 int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
4564                                      enum qeth_ipa_isolation_modes mode)
4565 {
4566         int rc;
4567         struct qeth_cmd_buffer *iob;
4568         struct qeth_ipa_cmd *cmd;
4569         struct qeth_set_access_ctrl *access_ctrl_req;
4570
4571         QETH_CARD_TEXT(card, 4, "setacctl");
4572
4573         if (!qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) {
4574                 dev_err(&card->gdev->dev,
4575                         "Adapter does not support QDIO data connection isolation\n");
4576                 return -EOPNOTSUPP;
4577         }
4578
4579         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL,
4580                                    SETADP_DATA_SIZEOF(set_access_ctrl));
4581         if (!iob)
4582                 return -ENOMEM;
4583         cmd = __ipa_cmd(iob);
4584         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4585         access_ctrl_req->subcmd_code = mode;
4586
4587         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb,
4588                                NULL);
4589         if (rc) {
4590                 QETH_CARD_TEXT_(card, 2, "rc=%d", rc);
4591                 QETH_DBF_MESSAGE(3, "IPA(SET_ACCESS_CTRL(%d) on device %x: sent failed\n",
4592                                  rc, CARD_DEVID(card));
4593         }
4594
4595         return rc;
4596 }
4597
4598 void qeth_tx_timeout(struct net_device *dev, unsigned int txqueue)
4599 {
4600         struct qeth_card *card;
4601
4602         card = dev->ml_priv;
4603         QETH_CARD_TEXT(card, 4, "txtimeo");
4604         qeth_schedule_recovery(card);
4605 }
4606 EXPORT_SYMBOL_GPL(qeth_tx_timeout);
4607
4608 static int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum)
4609 {
4610         struct qeth_card *card = dev->ml_priv;
4611         int rc = 0;
4612
4613         switch (regnum) {
4614         case MII_BMCR: /* Basic mode control register */
4615                 rc = BMCR_FULLDPLX;
4616                 if ((card->info.link_type != QETH_LINK_TYPE_GBIT_ETH) &&
4617                     (card->info.link_type != QETH_LINK_TYPE_OSN) &&
4618                     (card->info.link_type != QETH_LINK_TYPE_10GBIT_ETH) &&
4619                     (card->info.link_type != QETH_LINK_TYPE_25GBIT_ETH))
4620                         rc |= BMCR_SPEED100;
4621                 break;
4622         case MII_BMSR: /* Basic mode status register */
4623                 rc = BMSR_ERCAP | BMSR_ANEGCOMPLETE | BMSR_LSTATUS |
4624                      BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | BMSR_100FULL |
4625                      BMSR_100BASE4;
4626                 break;
4627         case MII_PHYSID1: /* PHYS ID 1 */
4628                 rc = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 8) |
4629                      dev->dev_addr[2];
4630                 rc = (rc >> 5) & 0xFFFF;
4631                 break;
4632         case MII_PHYSID2: /* PHYS ID 2 */
4633                 rc = (dev->dev_addr[2] << 10) & 0xFFFF;
4634                 break;
4635         case MII_ADVERTISE: /* Advertisement control reg */
4636                 rc = ADVERTISE_ALL;
4637                 break;
4638         case MII_LPA: /* Link partner ability reg */
4639                 rc = LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL |
4640                      LPA_100BASE4 | LPA_LPACK;
4641                 break;
4642         case MII_EXPANSION: /* Expansion register */
4643                 break;
4644         case MII_DCOUNTER: /* disconnect counter */
4645                 break;
4646         case MII_FCSCOUNTER: /* false carrier counter */
4647                 break;
4648         case MII_NWAYTEST: /* N-way auto-neg test register */
4649                 break;
4650         case MII_RERRCOUNTER: /* rx error counter */
4651                 rc = card->stats.rx_length_errors +
4652                      card->stats.rx_frame_errors +
4653                      card->stats.rx_fifo_errors;
4654                 break;
4655         case MII_SREVISION: /* silicon revision */
4656                 break;
4657         case MII_RESV1: /* reserved 1 */
4658                 break;
4659         case MII_LBRERROR: /* loopback, rx, bypass error */
4660                 break;
4661         case MII_PHYADDR: /* physical address */
4662                 break;
4663         case MII_RESV2: /* reserved 2 */
4664                 break;
4665         case MII_TPISTATUS: /* TPI status for 10mbps */
4666                 break;
4667         case MII_NCONFIG: /* network interface config */
4668                 break;
4669         default:
4670                 break;
4671         }
4672         return rc;
4673 }
4674
4675 static int qeth_snmp_command_cb(struct qeth_card *card,
4676                                 struct qeth_reply *reply, unsigned long data)
4677 {
4678         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4679         struct qeth_arp_query_info *qinfo = reply->param;
4680         struct qeth_ipacmd_setadpparms *adp_cmd;
4681         unsigned int data_len;
4682         void *snmp_data;
4683
4684         QETH_CARD_TEXT(card, 3, "snpcmdcb");
4685
4686         if (cmd->hdr.return_code) {
4687                 QETH_CARD_TEXT_(card, 4, "scer1%x", cmd->hdr.return_code);
4688                 return -EIO;
4689         }
4690         if (cmd->data.setadapterparms.hdr.return_code) {
4691                 cmd->hdr.return_code =
4692                         cmd->data.setadapterparms.hdr.return_code;
4693                 QETH_CARD_TEXT_(card, 4, "scer2%x", cmd->hdr.return_code);
4694                 return -EIO;
4695         }
4696
4697         adp_cmd = &cmd->data.setadapterparms;
4698         data_len = adp_cmd->hdr.cmdlength - sizeof(adp_cmd->hdr);
4699         if (adp_cmd->hdr.seq_no == 1) {
4700                 snmp_data = &adp_cmd->data.snmp;
4701         } else {
4702                 snmp_data = &adp_cmd->data.snmp.request;
4703                 data_len -= offsetof(struct qeth_snmp_cmd, request);
4704         }
4705
4706         /* check if there is enough room in userspace */
4707         if ((qinfo->udata_len - qinfo->udata_offset) < data_len) {
4708                 QETH_CARD_TEXT_(card, 4, "scer3%i", -ENOSPC);
4709                 return -ENOSPC;
4710         }
4711         QETH_CARD_TEXT_(card, 4, "snore%i",
4712                         cmd->data.setadapterparms.hdr.used_total);
4713         QETH_CARD_TEXT_(card, 4, "sseqn%i",
4714                         cmd->data.setadapterparms.hdr.seq_no);
4715         /*copy entries to user buffer*/
4716         memcpy(qinfo->udata + qinfo->udata_offset, snmp_data, data_len);
4717         qinfo->udata_offset += data_len;
4718
4719         if (cmd->data.setadapterparms.hdr.seq_no <
4720             cmd->data.setadapterparms.hdr.used_total)
4721                 return 1;
4722         return 0;
4723 }
4724
4725 static int qeth_snmp_command(struct qeth_card *card, char __user *udata)
4726 {
4727         struct qeth_snmp_ureq __user *ureq;
4728         struct qeth_cmd_buffer *iob;
4729         unsigned int req_len;
4730         struct qeth_arp_query_info qinfo = {0, };
4731         int rc = 0;
4732
4733         QETH_CARD_TEXT(card, 3, "snmpcmd");
4734
4735         if (IS_VM_NIC(card))
4736                 return -EOPNOTSUPP;
4737
4738         if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) &&
4739             IS_LAYER3(card))
4740                 return -EOPNOTSUPP;
4741
4742         ureq = (struct qeth_snmp_ureq __user *) udata;
4743         if (get_user(qinfo.udata_len, &ureq->hdr.data_len) ||
4744             get_user(req_len, &ureq->hdr.req_len))
4745                 return -EFAULT;
4746
4747         /* Sanitize user input, to avoid overflows in iob size calculation: */
4748         if (req_len > QETH_BUFSIZE)
4749                 return -EINVAL;
4750
4751         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL, req_len);
4752         if (!iob)
4753                 return -ENOMEM;
4754
4755         if (copy_from_user(&__ipa_cmd(iob)->data.setadapterparms.data.snmp,
4756                            &ureq->cmd, req_len)) {
4757                 qeth_put_cmd(iob);
4758                 return -EFAULT;
4759         }
4760
4761         qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
4762         if (!qinfo.udata) {
4763                 qeth_put_cmd(iob);
4764                 return -ENOMEM;
4765         }
4766         qinfo.udata_offset = sizeof(struct qeth_snmp_ureq_hdr);
4767
4768         rc = qeth_send_ipa_cmd(card, iob, qeth_snmp_command_cb, &qinfo);
4769         if (rc)
4770                 QETH_DBF_MESSAGE(2, "SNMP command failed on device %x: (%#x)\n",
4771                                  CARD_DEVID(card), rc);
4772         else {
4773                 if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
4774                         rc = -EFAULT;
4775         }
4776
4777         kfree(qinfo.udata);
4778         return rc;
4779 }
4780
4781 static int qeth_setadpparms_query_oat_cb(struct qeth_card *card,
4782                                          struct qeth_reply *reply,
4783                                          unsigned long data)
4784 {
4785         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4786         struct qeth_qoat_priv *priv = reply->param;
4787         int resdatalen;
4788
4789         QETH_CARD_TEXT(card, 3, "qoatcb");
4790         if (qeth_setadpparms_inspect_rc(cmd))
4791                 return -EIO;
4792
4793         resdatalen = cmd->data.setadapterparms.hdr.cmdlength;
4794
4795         if (resdatalen > (priv->buffer_len - priv->response_len))
4796                 return -ENOSPC;
4797
4798         memcpy(priv->buffer + priv->response_len,
4799                &cmd->data.setadapterparms.hdr, resdatalen);
4800         priv->response_len += resdatalen;
4801
4802         if (cmd->data.setadapterparms.hdr.seq_no <
4803             cmd->data.setadapterparms.hdr.used_total)
4804                 return 1;
4805         return 0;
4806 }
4807
4808 static int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
4809 {
4810         int rc = 0;
4811         struct qeth_cmd_buffer *iob;
4812         struct qeth_ipa_cmd *cmd;
4813         struct qeth_query_oat *oat_req;
4814         struct qeth_query_oat_data oat_data;
4815         struct qeth_qoat_priv priv;
4816         void __user *tmp;
4817
4818         QETH_CARD_TEXT(card, 3, "qoatcmd");
4819
4820         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT))
4821                 return -EOPNOTSUPP;
4822
4823         if (copy_from_user(&oat_data, udata, sizeof(oat_data)))
4824                 return -EFAULT;
4825
4826         priv.buffer_len = oat_data.buffer_len;
4827         priv.response_len = 0;
4828         priv.buffer = vzalloc(oat_data.buffer_len);
4829         if (!priv.buffer)
4830                 return -ENOMEM;
4831
4832         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4833                                    SETADP_DATA_SIZEOF(query_oat));
4834         if (!iob) {
4835                 rc = -ENOMEM;
4836                 goto out_free;
4837         }
4838         cmd = __ipa_cmd(iob);
4839         oat_req = &cmd->data.setadapterparms.data.query_oat;
4840         oat_req->subcmd_code = oat_data.command;
4841
4842         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb, &priv);
4843         if (!rc) {
4844                 tmp = is_compat_task() ? compat_ptr(oat_data.ptr) :
4845                                          u64_to_user_ptr(oat_data.ptr);
4846                 oat_data.response_len = priv.response_len;
4847
4848                 if (copy_to_user(tmp, priv.buffer, priv.response_len) ||
4849                     copy_to_user(udata, &oat_data, sizeof(oat_data)))
4850                         rc = -EFAULT;
4851         }
4852
4853 out_free:
4854         vfree(priv.buffer);
4855         return rc;
4856 }
4857
4858 static int qeth_query_card_info_cb(struct qeth_card *card,
4859                                    struct qeth_reply *reply, unsigned long data)
4860 {
4861         struct carrier_info *carrier_info = (struct carrier_info *)reply->param;
4862         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4863         struct qeth_query_card_info *card_info;
4864
4865         QETH_CARD_TEXT(card, 2, "qcrdincb");
4866         if (qeth_setadpparms_inspect_rc(cmd))
4867                 return -EIO;
4868
4869         card_info = &cmd->data.setadapterparms.data.card_info;
4870         carrier_info->card_type = card_info->card_type;
4871         carrier_info->port_mode = card_info->port_mode;
4872         carrier_info->port_speed = card_info->port_speed;
4873         return 0;
4874 }
4875
4876 int qeth_query_card_info(struct qeth_card *card,
4877                          struct carrier_info *carrier_info)
4878 {
4879         struct qeth_cmd_buffer *iob;
4880
4881         QETH_CARD_TEXT(card, 2, "qcrdinfo");
4882         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_CARD_INFO))
4883                 return -EOPNOTSUPP;
4884         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_CARD_INFO, 0);
4885         if (!iob)
4886                 return -ENOMEM;
4887         return qeth_send_ipa_cmd(card, iob, qeth_query_card_info_cb,
4888                                         (void *)carrier_info);
4889 }
4890
4891 /**
4892  * qeth_vm_request_mac() - Request a hypervisor-managed MAC address
4893  * @card: pointer to a qeth_card
4894  *
4895  * Returns
4896  *      0, if a MAC address has been set for the card's netdevice
4897  *      a return code, for various error conditions
4898  */
4899 int qeth_vm_request_mac(struct qeth_card *card)
4900 {
4901         struct diag26c_mac_resp *response;
4902         struct diag26c_mac_req *request;
4903         int rc;
4904
4905         QETH_CARD_TEXT(card, 2, "vmreqmac");
4906
4907         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
4908         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
4909         if (!request || !response) {
4910                 rc = -ENOMEM;
4911                 goto out;
4912         }
4913
4914         request->resp_buf_len = sizeof(*response);
4915         request->resp_version = DIAG26C_VERSION2;
4916         request->op_code = DIAG26C_GET_MAC;
4917         request->devno = card->info.ddev_devno;
4918
4919         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4920         rc = diag26c(request, response, DIAG26C_MAC_SERVICES);
4921         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4922         if (rc)
4923                 goto out;
4924         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
4925
4926         if (request->resp_buf_len < sizeof(*response) ||
4927             response->version != request->resp_version) {
4928                 rc = -EIO;
4929                 QETH_CARD_TEXT(card, 2, "badresp");
4930                 QETH_CARD_HEX(card, 2, &request->resp_buf_len,
4931                               sizeof(request->resp_buf_len));
4932         } else if (!is_valid_ether_addr(response->mac)) {
4933                 rc = -EINVAL;
4934                 QETH_CARD_TEXT(card, 2, "badmac");
4935                 QETH_CARD_HEX(card, 2, response->mac, ETH_ALEN);
4936         } else {
4937                 ether_addr_copy(card->dev->dev_addr, response->mac);
4938         }
4939
4940 out:
4941         kfree(response);
4942         kfree(request);
4943         return rc;
4944 }
4945 EXPORT_SYMBOL_GPL(qeth_vm_request_mac);
4946
4947 static void qeth_determine_capabilities(struct qeth_card *card)
4948 {
4949         struct qeth_channel *channel = &card->data;
4950         struct ccw_device *ddev = channel->ccwdev;
4951         int rc;
4952         int ddev_offline = 0;
4953
4954         QETH_CARD_TEXT(card, 2, "detcapab");
4955         if (!ddev->online) {
4956                 ddev_offline = 1;
4957                 rc = qeth_start_channel(channel);
4958                 if (rc) {
4959                         QETH_CARD_TEXT_(card, 2, "3err%d", rc);
4960                         goto out;
4961                 }
4962         }
4963
4964         rc = qeth_read_conf_data(card);
4965         if (rc) {
4966                 QETH_DBF_MESSAGE(2, "qeth_read_conf_data on device %x returned %i\n",
4967                                  CARD_DEVID(card), rc);
4968                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
4969                 goto out_offline;
4970         }
4971
4972         rc = qdio_get_ssqd_desc(ddev, &card->ssqd);
4973         if (rc)
4974                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
4975
4976         QETH_CARD_TEXT_(card, 2, "qfmt%d", card->ssqd.qfmt);
4977         QETH_CARD_TEXT_(card, 2, "ac1:%02x", card->ssqd.qdioac1);
4978         QETH_CARD_TEXT_(card, 2, "ac2:%04x", card->ssqd.qdioac2);
4979         QETH_CARD_TEXT_(card, 2, "ac3:%04x", card->ssqd.qdioac3);
4980         QETH_CARD_TEXT_(card, 2, "icnt%d", card->ssqd.icnt);
4981         if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) ||
4982             ((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) ||
4983             ((card->ssqd.qdioac3 & CHSC_AC3_FORMAT2_CQ_AVAILABLE) == 0))) {
4984                 dev_info(&card->gdev->dev,
4985                         "Completion Queueing supported\n");
4986         } else {
4987                 card->options.cq = QETH_CQ_NOTAVAILABLE;
4988         }
4989
4990 out_offline:
4991         if (ddev_offline == 1)
4992                 qeth_stop_channel(channel);
4993 out:
4994         return;
4995 }
4996
4997 static void qeth_read_ccw_conf_data(struct qeth_card *card)
4998 {
4999         struct qeth_card_info *info = &card->info;
5000         struct ccw_device *cdev = CARD_DDEV(card);
5001         struct ccw_dev_id dev_id;
5002
5003         QETH_CARD_TEXT(card, 2, "ccwconfd");
5004         ccw_device_get_id(cdev, &dev_id);
5005
5006         info->ddev_devno = dev_id.devno;
5007         info->ids_valid = !ccw_device_get_cssid(cdev, &info->cssid) &&
5008                           !ccw_device_get_iid(cdev, &info->iid) &&
5009                           !ccw_device_get_chid(cdev, 0, &info->chid);
5010         info->ssid = dev_id.ssid;
5011
5012         dev_info(&card->gdev->dev, "CHID: %x CHPID: %x\n",
5013                  info->chid, info->chpid);
5014
5015         QETH_CARD_TEXT_(card, 3, "devn%x", info->ddev_devno);
5016         QETH_CARD_TEXT_(card, 3, "cssid:%x", info->cssid);
5017         QETH_CARD_TEXT_(card, 3, "iid:%x", info->iid);
5018         QETH_CARD_TEXT_(card, 3, "ssid:%x", info->ssid);
5019         QETH_CARD_TEXT_(card, 3, "chpid:%x", info->chpid);
5020         QETH_CARD_TEXT_(card, 3, "chid:%x", info->chid);
5021         QETH_CARD_TEXT_(card, 3, "idval%x", info->ids_valid);
5022 }
5023
5024 static int qeth_qdio_establish(struct qeth_card *card)
5025 {
5026         struct qdio_buffer **out_sbal_ptrs[QETH_MAX_OUT_QUEUES];
5027         struct qdio_buffer **in_sbal_ptrs[QETH_MAX_IN_QUEUES];
5028         struct qeth_qib_parms *qib_parms = NULL;
5029         struct qdio_initialize init_data;
5030         unsigned int i;
5031         int rc = 0;
5032
5033         QETH_CARD_TEXT(card, 2, "qdioest");
5034
5035         if (!IS_IQD(card) && !IS_VM_NIC(card)) {
5036                 qib_parms = kzalloc(sizeof_field(struct qib, parm), GFP_KERNEL);
5037                 if (!qib_parms)
5038                         return -ENOMEM;
5039
5040                 qeth_fill_qib_parms(card, qib_parms);
5041         }
5042
5043         in_sbal_ptrs[0] = card->qdio.in_q->qdio_bufs;
5044         if (card->options.cq == QETH_CQ_ENABLED)
5045                 in_sbal_ptrs[1] = card->qdio.c_q->qdio_bufs;
5046
5047         for (i = 0; i < card->qdio.no_out_queues; i++)
5048                 out_sbal_ptrs[i] = card->qdio.out_qs[i]->qdio_bufs;
5049
5050         memset(&init_data, 0, sizeof(struct qdio_initialize));
5051         init_data.q_format               = IS_IQD(card) ? QDIO_IQDIO_QFMT :
5052                                                           QDIO_QETH_QFMT;
5053         init_data.qib_param_field_format = 0;
5054         init_data.qib_param_field        = (void *)qib_parms;
5055         init_data.no_input_qs            = card->qdio.no_in_queues;
5056         init_data.no_output_qs           = card->qdio.no_out_queues;
5057         init_data.input_handler          = qeth_qdio_input_handler;
5058         init_data.output_handler         = qeth_qdio_output_handler;
5059         init_data.irq_poll               = qeth_qdio_poll;
5060         init_data.int_parm               = (unsigned long) card;
5061         init_data.input_sbal_addr_array  = in_sbal_ptrs;
5062         init_data.output_sbal_addr_array = out_sbal_ptrs;
5063         init_data.output_sbal_state_array = card->qdio.out_bufstates;
5064         init_data.scan_threshold         = IS_IQD(card) ? 0 : 32;
5065
5066         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED,
5067                 QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) {
5068                 rc = qdio_allocate(CARD_DDEV(card), init_data.no_input_qs,
5069                                    init_data.no_output_qs);
5070                 if (rc) {
5071                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5072                         goto out;
5073                 }
5074                 rc = qdio_establish(CARD_DDEV(card), &init_data);
5075                 if (rc) {
5076                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5077                         qdio_free(CARD_DDEV(card));
5078                 }
5079         }
5080
5081         switch (card->options.cq) {
5082         case QETH_CQ_ENABLED:
5083                 dev_info(&card->gdev->dev, "Completion Queue support enabled");
5084                 break;
5085         case QETH_CQ_DISABLED:
5086                 dev_info(&card->gdev->dev, "Completion Queue support disabled");
5087                 break;
5088         default:
5089                 break;
5090         }
5091
5092 out:
5093         kfree(qib_parms);
5094         return rc;
5095 }
5096
5097 static void qeth_core_free_card(struct qeth_card *card)
5098 {
5099         QETH_CARD_TEXT(card, 2, "freecrd");
5100
5101         unregister_service_level(&card->qeth_service_level);
5102         debugfs_remove_recursive(card->debugfs);
5103         qeth_put_cmd(card->read_cmd);
5104         destroy_workqueue(card->event_wq);
5105         dev_set_drvdata(&card->gdev->dev, NULL);
5106         kfree(card);
5107 }
5108
5109 static void qeth_trace_features(struct qeth_card *card)
5110 {
5111         QETH_CARD_TEXT(card, 2, "features");
5112         QETH_CARD_HEX(card, 2, &card->options.ipa4, sizeof(card->options.ipa4));
5113         QETH_CARD_HEX(card, 2, &card->options.ipa6, sizeof(card->options.ipa6));
5114         QETH_CARD_HEX(card, 2, &card->options.adp, sizeof(card->options.adp));
5115         QETH_CARD_HEX(card, 2, &card->info.diagass_support,
5116                       sizeof(card->info.diagass_support));
5117 }
5118
5119 static struct ccw_device_id qeth_ids[] = {
5120         {CCW_DEVICE_DEVTYPE(0x1731, 0x01, 0x1732, 0x01),
5121                                         .driver_info = QETH_CARD_TYPE_OSD},
5122         {CCW_DEVICE_DEVTYPE(0x1731, 0x05, 0x1732, 0x05),
5123                                         .driver_info = QETH_CARD_TYPE_IQD},
5124 #ifdef CONFIG_QETH_OSN
5125         {CCW_DEVICE_DEVTYPE(0x1731, 0x06, 0x1732, 0x06),
5126                                         .driver_info = QETH_CARD_TYPE_OSN},
5127 #endif
5128         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x03),
5129                                         .driver_info = QETH_CARD_TYPE_OSM},
5130 #ifdef CONFIG_QETH_OSX
5131         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x02),
5132                                         .driver_info = QETH_CARD_TYPE_OSX},
5133 #endif
5134         {},
5135 };
5136 MODULE_DEVICE_TABLE(ccw, qeth_ids);
5137
5138 static struct ccw_driver qeth_ccw_driver = {
5139         .driver = {
5140                 .owner = THIS_MODULE,
5141                 .name = "qeth",
5142         },
5143         .ids = qeth_ids,
5144         .probe = ccwgroup_probe_ccwdev,
5145         .remove = ccwgroup_remove_ccwdev,
5146 };
5147
5148 static int qeth_hardsetup_card(struct qeth_card *card, bool *carrier_ok)
5149 {
5150         int retries = 3;
5151         int rc;
5152
5153         QETH_CARD_TEXT(card, 2, "hrdsetup");
5154         atomic_set(&card->force_alloc_skb, 0);
5155         rc = qeth_update_from_chp_desc(card);
5156         if (rc)
5157                 return rc;
5158 retry:
5159         if (retries < 3)
5160                 QETH_DBF_MESSAGE(2, "Retrying to do IDX activates on device %x.\n",
5161                                  CARD_DEVID(card));
5162         rc = qeth_qdio_clear_card(card, !IS_IQD(card));
5163         qeth_stop_channel(&card->data);
5164         qeth_stop_channel(&card->write);
5165         qeth_stop_channel(&card->read);
5166         qdio_free(CARD_DDEV(card));
5167
5168         rc = qeth_start_channel(&card->read);
5169         if (rc)
5170                 goto retriable;
5171         rc = qeth_start_channel(&card->write);
5172         if (rc)
5173                 goto retriable;
5174         rc = qeth_start_channel(&card->data);
5175         if (rc)
5176                 goto retriable;
5177 retriable:
5178         if (rc == -ERESTARTSYS) {
5179                 QETH_CARD_TEXT(card, 2, "break1");
5180                 return rc;
5181         } else if (rc) {
5182                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
5183                 if (--retries < 0)
5184                         goto out;
5185                 else
5186                         goto retry;
5187         }
5188
5189         qeth_determine_capabilities(card);
5190         qeth_read_ccw_conf_data(card);
5191         qeth_idx_init(card);
5192
5193         rc = qeth_idx_activate_read_channel(card);
5194         if (rc == -EINTR) {
5195                 QETH_CARD_TEXT(card, 2, "break2");
5196                 return rc;
5197         } else if (rc) {
5198                 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
5199                 if (--retries < 0)
5200                         goto out;
5201                 else
5202                         goto retry;
5203         }
5204
5205         rc = qeth_idx_activate_write_channel(card);
5206         if (rc == -EINTR) {
5207                 QETH_CARD_TEXT(card, 2, "break3");
5208                 return rc;
5209         } else if (rc) {
5210                 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
5211                 if (--retries < 0)
5212                         goto out;
5213                 else
5214                         goto retry;
5215         }
5216         card->read_or_write_problem = 0;
5217         rc = qeth_mpc_initialize(card);
5218         if (rc) {
5219                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
5220                 goto out;
5221         }
5222
5223         rc = qeth_send_startlan(card);
5224         if (rc) {
5225                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
5226                 if (rc == -ENETDOWN) {
5227                         dev_warn(&card->gdev->dev, "The LAN is offline\n");
5228                         *carrier_ok = false;
5229                 } else {
5230                         goto out;
5231                 }
5232         } else {
5233                 *carrier_ok = true;
5234         }
5235
5236         card->options.ipa4.supported = 0;
5237         card->options.ipa6.supported = 0;
5238         card->options.adp.supported = 0;
5239         card->options.sbp.supported_funcs = 0;
5240         card->info.diagass_support = 0;
5241         rc = qeth_query_ipassists(card, QETH_PROT_IPV4);
5242         if (rc == -ENOMEM)
5243                 goto out;
5244         if (qeth_is_supported(card, IPA_IPV6)) {
5245                 rc = qeth_query_ipassists(card, QETH_PROT_IPV6);
5246                 if (rc == -ENOMEM)
5247                         goto out;
5248         }
5249         if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
5250                 rc = qeth_query_setadapterparms(card);
5251                 if (rc < 0) {
5252                         QETH_CARD_TEXT_(card, 2, "7err%d", rc);
5253                         goto out;
5254                 }
5255         }
5256         if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
5257                 rc = qeth_query_setdiagass(card);
5258                 if (rc)
5259                         QETH_CARD_TEXT_(card, 2, "8err%d", rc);
5260         }
5261
5262         qeth_trace_features(card);
5263
5264         if (!qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP) ||
5265             (card->info.hwtrap && qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM)))
5266                 card->info.hwtrap = 0;
5267
5268         if (card->options.isolation != ISOLATION_MODE_NONE) {
5269                 rc = qeth_setadpparms_set_access_ctrl(card,
5270                                                       card->options.isolation);
5271                 if (rc)
5272                         goto out;
5273         }
5274
5275         rc = qeth_init_qdio_queues(card);
5276         if (rc) {
5277                 QETH_CARD_TEXT_(card, 2, "9err%d", rc);
5278                 goto out;
5279         }
5280
5281         return 0;
5282 out:
5283         dev_warn(&card->gdev->dev, "The qeth device driver failed to recover "
5284                 "an error on the device\n");
5285         QETH_DBF_MESSAGE(2, "Initialization for device %x failed in hardsetup! rc=%d\n",
5286                          CARD_DEVID(card), rc);
5287         return rc;
5288 }
5289
5290 static int qeth_set_online(struct qeth_card *card,
5291                            const struct qeth_discipline *disc)
5292 {
5293         bool carrier_ok;
5294         int rc;
5295
5296         mutex_lock(&card->conf_mutex);
5297         QETH_CARD_TEXT(card, 2, "setonlin");
5298
5299         rc = qeth_hardsetup_card(card, &carrier_ok);
5300         if (rc) {
5301                 QETH_CARD_TEXT_(card, 2, "2err%04x", rc);
5302                 rc = -ENODEV;
5303                 goto err_hardsetup;
5304         }
5305
5306         qeth_print_status_message(card);
5307
5308         if (card->dev->reg_state != NETREG_REGISTERED)
5309                 /* no need for locking / error handling at this early stage: */
5310                 qeth_set_real_num_tx_queues(card, qeth_tx_actual_queues(card));
5311
5312         rc = disc->set_online(card, carrier_ok);
5313         if (rc)
5314                 goto err_online;
5315
5316         /* let user_space know that device is online */
5317         kobject_uevent(&card->gdev->dev.kobj, KOBJ_CHANGE);
5318
5319         mutex_unlock(&card->conf_mutex);
5320         return 0;
5321
5322 err_online:
5323 err_hardsetup:
5324         qeth_qdio_clear_card(card, 0);
5325         qeth_clear_working_pool_list(card);
5326         qeth_flush_local_addrs(card);
5327
5328         qeth_stop_channel(&card->data);
5329         qeth_stop_channel(&card->write);
5330         qeth_stop_channel(&card->read);
5331         qdio_free(CARD_DDEV(card));
5332
5333         mutex_unlock(&card->conf_mutex);
5334         return rc;
5335 }
5336
5337 int qeth_set_offline(struct qeth_card *card, const struct qeth_discipline *disc,
5338                      bool resetting)
5339 {
5340         int rc, rc2, rc3;
5341
5342         mutex_lock(&card->conf_mutex);
5343         QETH_CARD_TEXT(card, 3, "setoffl");
5344
5345         if ((!resetting && card->info.hwtrap) || card->info.hwtrap == 2) {
5346                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
5347                 card->info.hwtrap = 1;
5348         }
5349
5350         /* cancel any stalled cmd that might block the rtnl: */
5351         qeth_clear_ipacmd_list(card);
5352
5353         rtnl_lock();
5354         netif_device_detach(card->dev);
5355         netif_carrier_off(card->dev);
5356         rtnl_unlock();
5357
5358         cancel_work_sync(&card->rx_mode_work);
5359
5360         disc->set_offline(card);
5361
5362         qeth_qdio_clear_card(card, 0);
5363         qeth_drain_output_queues(card);
5364         qeth_clear_working_pool_list(card);
5365         qeth_flush_local_addrs(card);
5366         card->info.promisc_mode = 0;
5367
5368         rc  = qeth_stop_channel(&card->data);
5369         rc2 = qeth_stop_channel(&card->write);
5370         rc3 = qeth_stop_channel(&card->read);
5371         if (!rc)
5372                 rc = (rc2) ? rc2 : rc3;
5373         if (rc)
5374                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
5375         qdio_free(CARD_DDEV(card));
5376
5377         /* let user_space know that device is offline */
5378         kobject_uevent(&card->gdev->dev.kobj, KOBJ_CHANGE);
5379
5380         mutex_unlock(&card->conf_mutex);
5381         return 0;
5382 }
5383 EXPORT_SYMBOL_GPL(qeth_set_offline);
5384
5385 static int qeth_do_reset(void *data)
5386 {
5387         const struct qeth_discipline *disc;
5388         struct qeth_card *card = data;
5389         int rc;
5390
5391         /* Lock-free, other users will block until we are done. */
5392         disc = card->discipline;
5393
5394         QETH_CARD_TEXT(card, 2, "recover1");
5395         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
5396                 return 0;
5397         QETH_CARD_TEXT(card, 2, "recover2");
5398         dev_warn(&card->gdev->dev,
5399                  "A recovery process has been started for the device\n");
5400
5401         qeth_set_offline(card, disc, true);
5402         rc = qeth_set_online(card, disc);
5403         if (!rc) {
5404                 dev_info(&card->gdev->dev,
5405                          "Device successfully recovered!\n");
5406         } else {
5407                 ccwgroup_set_offline(card->gdev);
5408                 dev_warn(&card->gdev->dev,
5409                          "The qeth device driver failed to recover an error on the device\n");
5410         }
5411         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
5412         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
5413         return 0;
5414 }
5415
5416 #if IS_ENABLED(CONFIG_QETH_L3)
5417 static void qeth_l3_rebuild_skb(struct qeth_card *card, struct sk_buff *skb,
5418                                 struct qeth_hdr *hdr)
5419 {
5420         struct af_iucv_trans_hdr *iucv = (struct af_iucv_trans_hdr *) skb->data;
5421         struct qeth_hdr_layer3 *l3_hdr = &hdr->hdr.l3;
5422         struct net_device *dev = skb->dev;
5423
5424         if (IS_IQD(card) && iucv->magic == ETH_P_AF_IUCV) {
5425                 dev_hard_header(skb, dev, ETH_P_AF_IUCV, dev->dev_addr,
5426                                 "FAKELL", skb->len);
5427                 return;
5428         }
5429
5430         if (!(l3_hdr->flags & QETH_HDR_PASSTHRU)) {
5431                 u16 prot = (l3_hdr->flags & QETH_HDR_IPV6) ? ETH_P_IPV6 :
5432                                                              ETH_P_IP;
5433                 unsigned char tg_addr[ETH_ALEN];
5434
5435                 skb_reset_network_header(skb);
5436                 switch (l3_hdr->flags & QETH_HDR_CAST_MASK) {
5437                 case QETH_CAST_MULTICAST:
5438                         if (prot == ETH_P_IP)
5439                                 ip_eth_mc_map(ip_hdr(skb)->daddr, tg_addr);
5440                         else
5441                                 ipv6_eth_mc_map(&ipv6_hdr(skb)->daddr, tg_addr);
5442                         QETH_CARD_STAT_INC(card, rx_multicast);
5443                         break;
5444                 case QETH_CAST_BROADCAST:
5445                         ether_addr_copy(tg_addr, dev->broadcast);
5446                         QETH_CARD_STAT_INC(card, rx_multicast);
5447                         break;
5448                 default:
5449                         if (card->options.sniffer)
5450                                 skb->pkt_type = PACKET_OTHERHOST;
5451                         ether_addr_copy(tg_addr, dev->dev_addr);
5452                 }
5453
5454                 if (l3_hdr->ext_flags & QETH_HDR_EXT_SRC_MAC_ADDR)
5455                         dev_hard_header(skb, dev, prot, tg_addr,
5456                                         &l3_hdr->next_hop.rx.src_mac, skb->len);
5457                 else
5458                         dev_hard_header(skb, dev, prot, tg_addr, "FAKELL",
5459                                         skb->len);
5460         }
5461
5462         /* copy VLAN tag from hdr into skb */
5463         if (!card->options.sniffer &&
5464             (l3_hdr->ext_flags & (QETH_HDR_EXT_VLAN_FRAME |
5465                                   QETH_HDR_EXT_INCLUDE_VLAN_TAG))) {
5466                 u16 tag = (l3_hdr->ext_flags & QETH_HDR_EXT_VLAN_FRAME) ?
5467                                 l3_hdr->vlan_id :
5468                                 l3_hdr->next_hop.rx.vlan_id;
5469
5470                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag);
5471         }
5472 }
5473 #endif
5474
5475 static void qeth_receive_skb(struct qeth_card *card, struct sk_buff *skb,
5476                              struct qeth_hdr *hdr, bool uses_frags)
5477 {
5478         struct napi_struct *napi = &card->napi;
5479         bool is_cso;
5480
5481         switch (hdr->hdr.l2.id) {
5482         case QETH_HEADER_TYPE_OSN:
5483                 skb_push(skb, sizeof(*hdr));
5484                 skb_copy_to_linear_data(skb, hdr, sizeof(*hdr));
5485                 QETH_CARD_STAT_ADD(card, rx_bytes, skb->len);
5486                 QETH_CARD_STAT_INC(card, rx_packets);
5487
5488                 card->osn_info.data_cb(skb);
5489                 return;
5490 #if IS_ENABLED(CONFIG_QETH_L3)
5491         case QETH_HEADER_TYPE_LAYER3:
5492                 qeth_l3_rebuild_skb(card, skb, hdr);
5493                 is_cso = hdr->hdr.l3.ext_flags & QETH_HDR_EXT_CSUM_TRANSP_REQ;
5494                 break;
5495 #endif
5496         case QETH_HEADER_TYPE_LAYER2:
5497                 is_cso = hdr->hdr.l2.flags[1] & QETH_HDR_EXT_CSUM_TRANSP_REQ;
5498                 break;
5499         default:
5500                 /* never happens */
5501                 if (uses_frags)
5502                         napi_free_frags(napi);
5503                 else
5504                         dev_kfree_skb_any(skb);
5505                 return;
5506         }
5507
5508         if (is_cso && (card->dev->features & NETIF_F_RXCSUM)) {
5509                 skb->ip_summed = CHECKSUM_UNNECESSARY;
5510                 QETH_CARD_STAT_INC(card, rx_skb_csum);
5511         } else {
5512                 skb->ip_summed = CHECKSUM_NONE;
5513         }
5514
5515         QETH_CARD_STAT_ADD(card, rx_bytes, skb->len);
5516         QETH_CARD_STAT_INC(card, rx_packets);
5517         if (skb_is_nonlinear(skb)) {
5518                 QETH_CARD_STAT_INC(card, rx_sg_skbs);
5519                 QETH_CARD_STAT_ADD(card, rx_sg_frags,
5520                                    skb_shinfo(skb)->nr_frags);
5521         }
5522
5523         if (uses_frags) {
5524                 napi_gro_frags(napi);
5525         } else {
5526                 skb->protocol = eth_type_trans(skb, skb->dev);
5527                 napi_gro_receive(napi, skb);
5528         }
5529 }
5530
5531 static void qeth_create_skb_frag(struct sk_buff *skb, char *data, int data_len)
5532 {
5533         struct page *page = virt_to_page(data);
5534         unsigned int next_frag;
5535
5536         next_frag = skb_shinfo(skb)->nr_frags;
5537         get_page(page);
5538         skb_add_rx_frag(skb, next_frag, page, offset_in_page(data), data_len,
5539                         data_len);
5540 }
5541
5542 static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale)
5543 {
5544         return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY);
5545 }
5546
5547 static int qeth_extract_skb(struct qeth_card *card,
5548                             struct qeth_qdio_buffer *qethbuffer, u8 *element_no,
5549                             int *__offset)
5550 {
5551         struct qeth_priv *priv = netdev_priv(card->dev);
5552         struct qdio_buffer *buffer = qethbuffer->buffer;
5553         struct napi_struct *napi = &card->napi;
5554         struct qdio_buffer_element *element;
5555         unsigned int linear_len = 0;
5556         bool uses_frags = false;
5557         int offset = *__offset;
5558         bool use_rx_sg = false;
5559         unsigned int headroom;
5560         struct qeth_hdr *hdr;
5561         struct sk_buff *skb;
5562         int skb_len = 0;
5563
5564         element = &buffer->element[*element_no];
5565
5566 next_packet:
5567         /* qeth_hdr must not cross element boundaries */
5568         while (element->length < offset + sizeof(struct qeth_hdr)) {
5569                 if (qeth_is_last_sbale(element))
5570                         return -ENODATA;
5571                 element++;
5572                 offset = 0;
5573         }
5574
5575         hdr = phys_to_virt(element->addr) + offset;
5576         offset += sizeof(*hdr);
5577         skb = NULL;
5578
5579         switch (hdr->hdr.l2.id) {
5580         case QETH_HEADER_TYPE_LAYER2:
5581                 skb_len = hdr->hdr.l2.pkt_length;
5582                 linear_len = ETH_HLEN;
5583                 headroom = 0;
5584                 break;
5585         case QETH_HEADER_TYPE_LAYER3:
5586                 skb_len = hdr->hdr.l3.length;
5587                 if (!IS_LAYER3(card)) {
5588                         QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5589                         goto walk_packet;
5590                 }
5591
5592                 if (hdr->hdr.l3.flags & QETH_HDR_PASSTHRU) {
5593                         linear_len = ETH_HLEN;
5594                         headroom = 0;
5595                         break;
5596                 }
5597
5598                 if (hdr->hdr.l3.flags & QETH_HDR_IPV6)
5599                         linear_len = sizeof(struct ipv6hdr);
5600                 else
5601                         linear_len = sizeof(struct iphdr);
5602                 headroom = ETH_HLEN;
5603                 break;
5604         case QETH_HEADER_TYPE_OSN:
5605                 skb_len = hdr->hdr.osn.pdu_length;
5606                 if (!IS_OSN(card)) {
5607                         QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5608                         goto walk_packet;
5609                 }
5610
5611                 linear_len = skb_len;
5612                 headroom = sizeof(struct qeth_hdr);
5613                 break;
5614         default:
5615                 if (hdr->hdr.l2.id & QETH_HEADER_MASK_INVAL)
5616                         QETH_CARD_STAT_INC(card, rx_frame_errors);
5617                 else
5618                         QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5619
5620                 /* Can't determine packet length, drop the whole buffer. */
5621                 return -EPROTONOSUPPORT;
5622         }
5623
5624         if (skb_len < linear_len) {
5625                 QETH_CARD_STAT_INC(card, rx_dropped_runt);
5626                 goto walk_packet;
5627         }
5628
5629         use_rx_sg = (card->options.cq == QETH_CQ_ENABLED) ||
5630                     (skb_len > READ_ONCE(priv->rx_copybreak) &&
5631                      !atomic_read(&card->force_alloc_skb) &&
5632                      !IS_OSN(card));
5633
5634         if (use_rx_sg) {
5635                 /* QETH_CQ_ENABLED only: */
5636                 if (qethbuffer->rx_skb &&
5637                     skb_tailroom(qethbuffer->rx_skb) >= linear_len + headroom) {
5638                         skb = qethbuffer->rx_skb;
5639                         qethbuffer->rx_skb = NULL;
5640                         goto use_skb;
5641                 }
5642
5643                 skb = napi_get_frags(napi);
5644                 if (!skb) {
5645                         /* -ENOMEM, no point in falling back further. */
5646                         QETH_CARD_STAT_INC(card, rx_dropped_nomem);
5647                         goto walk_packet;
5648                 }
5649
5650                 if (skb_tailroom(skb) >= linear_len + headroom) {
5651                         uses_frags = true;
5652                         goto use_skb;
5653                 }
5654
5655                 netdev_info_once(card->dev,
5656                                  "Insufficient linear space in NAPI frags skb, need %u but have %u\n",
5657                                  linear_len + headroom, skb_tailroom(skb));
5658                 /* Shouldn't happen. Don't optimize, fall back to linear skb. */
5659         }
5660
5661         linear_len = skb_len;
5662         skb = napi_alloc_skb(napi, linear_len + headroom);
5663         if (!skb) {
5664                 QETH_CARD_STAT_INC(card, rx_dropped_nomem);
5665                 goto walk_packet;
5666         }
5667
5668 use_skb:
5669         if (headroom)
5670                 skb_reserve(skb, headroom);
5671 walk_packet:
5672         while (skb_len) {
5673                 int data_len = min(skb_len, (int)(element->length - offset));
5674                 char *data = phys_to_virt(element->addr) + offset;
5675
5676                 skb_len -= data_len;
5677                 offset += data_len;
5678
5679                 /* Extract data from current element: */
5680                 if (skb && data_len) {
5681                         if (linear_len) {
5682                                 unsigned int copy_len;
5683
5684                                 copy_len = min_t(unsigned int, linear_len,
5685                                                  data_len);
5686
5687                                 skb_put_data(skb, data, copy_len);
5688                                 linear_len -= copy_len;
5689                                 data_len -= copy_len;
5690                                 data += copy_len;
5691                         }
5692
5693                         if (data_len)
5694                                 qeth_create_skb_frag(skb, data, data_len);
5695                 }
5696
5697                 /* Step forward to next element: */
5698                 if (skb_len) {
5699                         if (qeth_is_last_sbale(element)) {
5700                                 QETH_CARD_TEXT(card, 4, "unexeob");
5701                                 QETH_CARD_HEX(card, 2, buffer, sizeof(void *));
5702                                 if (skb) {
5703                                         if (uses_frags)
5704                                                 napi_free_frags(napi);
5705                                         else
5706                                                 dev_kfree_skb_any(skb);
5707                                         QETH_CARD_STAT_INC(card,
5708                                                            rx_length_errors);
5709                                 }
5710                                 return -EMSGSIZE;
5711                         }
5712                         element++;
5713                         offset = 0;
5714                 }
5715         }
5716
5717         /* This packet was skipped, go get another one: */
5718         if (!skb)
5719                 goto next_packet;
5720
5721         *element_no = element - &buffer->element[0];
5722         *__offset = offset;
5723
5724         qeth_receive_skb(card, skb, hdr, uses_frags);
5725         return 0;
5726 }
5727
5728 static unsigned int qeth_extract_skbs(struct qeth_card *card, int budget,
5729                                       struct qeth_qdio_buffer *buf, bool *done)
5730 {
5731         unsigned int work_done = 0;
5732
5733         while (budget) {
5734                 if (qeth_extract_skb(card, buf, &card->rx.buf_element,
5735                                      &card->rx.e_offset)) {
5736                         *done = true;
5737                         break;
5738                 }
5739
5740                 work_done++;
5741                 budget--;
5742         }
5743
5744         return work_done;
5745 }
5746
5747 static unsigned int qeth_rx_poll(struct qeth_card *card, int budget)
5748 {
5749         struct qeth_rx *ctx = &card->rx;
5750         unsigned int work_done = 0;
5751
5752         while (budget > 0) {
5753                 struct qeth_qdio_buffer *buffer;
5754                 unsigned int skbs_done = 0;
5755                 bool done = false;
5756
5757                 /* Fetch completed RX buffers: */
5758                 if (!card->rx.b_count) {
5759                         card->rx.qdio_err = 0;
5760                         card->rx.b_count = qdio_get_next_buffers(
5761                                 card->data.ccwdev, 0, &card->rx.b_index,
5762                                 &card->rx.qdio_err);
5763                         if (card->rx.b_count <= 0) {
5764                                 card->rx.b_count = 0;
5765                                 break;
5766                         }
5767                 }
5768
5769                 /* Process one completed RX buffer: */
5770                 buffer = &card->qdio.in_q->bufs[card->rx.b_index];
5771                 if (!(card->rx.qdio_err &&
5772                       qeth_check_qdio_errors(card, buffer->buffer,
5773                                              card->rx.qdio_err, "qinerr")))
5774                         skbs_done = qeth_extract_skbs(card, budget, buffer,
5775                                                       &done);
5776                 else
5777                         done = true;
5778
5779                 work_done += skbs_done;
5780                 budget -= skbs_done;
5781
5782                 if (done) {
5783                         QETH_CARD_STAT_INC(card, rx_bufs);
5784                         qeth_put_buffer_pool_entry(card, buffer->pool_entry);
5785                         buffer->pool_entry = NULL;
5786                         card->rx.b_count--;
5787                         ctx->bufs_refill++;
5788                         ctx->bufs_refill -= qeth_rx_refill_queue(card,
5789                                                                  ctx->bufs_refill);
5790
5791                         /* Step forward to next buffer: */
5792                         card->rx.b_index = QDIO_BUFNR(card->rx.b_index + 1);
5793                         card->rx.buf_element = 0;
5794                         card->rx.e_offset = 0;
5795                 }
5796         }
5797
5798         return work_done;
5799 }
5800
5801 static void qeth_cq_poll(struct qeth_card *card)
5802 {
5803         unsigned int work_done = 0;
5804
5805         while (work_done < QDIO_MAX_BUFFERS_PER_Q) {
5806                 unsigned int start, error;
5807                 int completed;
5808
5809                 completed = qdio_inspect_queue(CARD_DDEV(card), 1, true, &start,
5810                                                &error);
5811                 if (completed <= 0)
5812                         return;
5813
5814                 qeth_qdio_cq_handler(card, error, 1, start, completed);
5815                 work_done += completed;
5816         }
5817 }
5818
5819 int qeth_poll(struct napi_struct *napi, int budget)
5820 {
5821         struct qeth_card *card = container_of(napi, struct qeth_card, napi);
5822         unsigned int work_done;
5823
5824         work_done = qeth_rx_poll(card, budget);
5825
5826         if (card->options.cq == QETH_CQ_ENABLED)
5827                 qeth_cq_poll(card);
5828
5829         if (budget) {
5830                 struct qeth_rx *ctx = &card->rx;
5831
5832                 /* Process any substantial refill backlog: */
5833                 ctx->bufs_refill -= qeth_rx_refill_queue(card, ctx->bufs_refill);
5834
5835                 /* Exhausted the RX budget. Keep IRQ disabled, we get called again. */
5836                 if (work_done >= budget)
5837                         return work_done;
5838         }
5839
5840         if (napi_complete_done(napi, work_done) &&
5841             qdio_start_irq(CARD_DDEV(card)))
5842                 napi_schedule(napi);
5843
5844         return work_done;
5845 }
5846 EXPORT_SYMBOL_GPL(qeth_poll);
5847
5848 static void qeth_iqd_tx_complete(struct qeth_qdio_out_q *queue,
5849                                  unsigned int bidx, bool error, int budget)
5850 {
5851         struct qeth_qdio_out_buffer *buffer = queue->bufs[bidx];
5852         u8 sflags = buffer->buffer->element[15].sflags;
5853         struct qeth_card *card = queue->card;
5854
5855         if (queue->bufstates && (queue->bufstates[bidx].flags &
5856                                  QDIO_OUTBUF_STATE_FLAG_PENDING)) {
5857                 WARN_ON_ONCE(card->options.cq != QETH_CQ_ENABLED);
5858
5859                 QETH_CARD_TEXT_(card, 5, "pel%u", bidx);
5860
5861                 switch (atomic_cmpxchg(&buffer->state,
5862                                        QETH_QDIO_BUF_PRIMED,
5863                                        QETH_QDIO_BUF_PENDING)) {
5864                 case QETH_QDIO_BUF_PRIMED:
5865                         /* We have initial ownership, no QAOB (yet): */
5866                         qeth_notify_skbs(queue, buffer, TX_NOTIFY_PENDING);
5867
5868                         /* Handle race with qeth_qdio_handle_aob(): */
5869                         switch (atomic_xchg(&buffer->state,
5870                                             QETH_QDIO_BUF_NEED_QAOB)) {
5871                         case QETH_QDIO_BUF_PENDING:
5872                                 /* No concurrent QAOB notification. */
5873
5874                                 /* Prepare the queue slot for immediate re-use: */
5875                                 qeth_scrub_qdio_buffer(buffer->buffer, queue->max_elements);
5876                                 if (qeth_init_qdio_out_buf(queue, bidx)) {
5877                                         QETH_CARD_TEXT(card, 2, "outofbuf");
5878                                         qeth_schedule_recovery(card);
5879                                 }
5880
5881                                 list_add(&buffer->list_entry,
5882                                          &queue->pending_bufs);
5883                                 /* Skip clearing the buffer: */
5884                                 return;
5885                         case QETH_QDIO_BUF_QAOB_OK:
5886                                 qeth_notify_skbs(queue, buffer,
5887                                                  TX_NOTIFY_DELAYED_OK);
5888                                 error = false;
5889                                 break;
5890                         case QETH_QDIO_BUF_QAOB_ERROR:
5891                                 qeth_notify_skbs(queue, buffer,
5892                                                  TX_NOTIFY_DELAYED_GENERALERROR);
5893                                 error = true;
5894                                 break;
5895                         default:
5896                                 WARN_ON_ONCE(1);
5897                         }
5898
5899                         break;
5900                 case QETH_QDIO_BUF_QAOB_OK:
5901                         /* qeth_qdio_handle_aob() already received a QAOB: */
5902                         qeth_notify_skbs(queue, buffer, TX_NOTIFY_OK);
5903                         error = false;
5904                         break;
5905                 case QETH_QDIO_BUF_QAOB_ERROR:
5906                         /* qeth_qdio_handle_aob() already received a QAOB: */
5907                         qeth_notify_skbs(queue, buffer, TX_NOTIFY_GENERALERROR);
5908                         error = true;
5909                         break;
5910                 default:
5911                         WARN_ON_ONCE(1);
5912                 }
5913         } else if (card->options.cq == QETH_CQ_ENABLED) {
5914                 qeth_notify_skbs(queue, buffer,
5915                                  qeth_compute_cq_notification(sflags, 0));
5916         }
5917
5918         qeth_clear_output_buffer(queue, buffer, error, budget);
5919 }
5920
5921 static int qeth_tx_poll(struct napi_struct *napi, int budget)
5922 {
5923         struct qeth_qdio_out_q *queue = qeth_napi_to_out_queue(napi);
5924         unsigned int queue_no = queue->queue_no;
5925         struct qeth_card *card = queue->card;
5926         struct net_device *dev = card->dev;
5927         unsigned int work_done = 0;
5928         struct netdev_queue *txq;
5929
5930         txq = netdev_get_tx_queue(dev, qeth_iqd_translate_txq(dev, queue_no));
5931
5932         while (1) {
5933                 unsigned int start, error, i;
5934                 unsigned int packets = 0;
5935                 unsigned int bytes = 0;
5936                 int completed;
5937
5938                 qeth_tx_complete_pending_bufs(card, queue, false);
5939
5940                 if (qeth_out_queue_is_empty(queue)) {
5941                         napi_complete(napi);
5942                         return 0;
5943                 }
5944
5945                 /* Give the CPU a breather: */
5946                 if (work_done >= QDIO_MAX_BUFFERS_PER_Q) {
5947                         QETH_TXQ_STAT_INC(queue, completion_yield);
5948                         if (napi_complete_done(napi, 0))
5949                                 napi_schedule(napi);
5950                         return 0;
5951                 }
5952
5953                 completed = qdio_inspect_queue(CARD_DDEV(card), queue_no, false,
5954                                                &start, &error);
5955                 if (completed <= 0) {
5956                         /* Ensure we see TX completion for pending work: */
5957                         if (napi_complete_done(napi, 0))
5958                                 qeth_tx_arm_timer(queue, QETH_TX_TIMER_USECS);
5959                         return 0;
5960                 }
5961
5962                 for (i = start; i < start + completed; i++) {
5963                         struct qeth_qdio_out_buffer *buffer;
5964                         unsigned int bidx = QDIO_BUFNR(i);
5965
5966                         buffer = queue->bufs[bidx];
5967                         packets += buffer->frames;
5968                         bytes += buffer->bytes;
5969
5970                         qeth_handle_send_error(card, buffer, error);
5971                         qeth_iqd_tx_complete(queue, bidx, error, budget);
5972                 }
5973
5974                 netdev_tx_completed_queue(txq, packets, bytes);
5975                 atomic_sub(completed, &queue->used_buffers);
5976                 work_done += completed;
5977
5978                 /* xmit may have observed the full-condition, but not yet
5979                  * stopped the txq. In which case the code below won't trigger.
5980                  * So before returning, xmit will re-check the txq's fill level
5981                  * and wake it up if needed.
5982                  */
5983                 if (netif_tx_queue_stopped(txq) &&
5984                     !qeth_out_queue_is_full(queue))
5985                         netif_tx_wake_queue(txq);
5986         }
5987 }
5988
5989 static int qeth_setassparms_inspect_rc(struct qeth_ipa_cmd *cmd)
5990 {
5991         if (!cmd->hdr.return_code)
5992                 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
5993         return cmd->hdr.return_code;
5994 }
5995
5996 static int qeth_setassparms_get_caps_cb(struct qeth_card *card,
5997                                         struct qeth_reply *reply,
5998                                         unsigned long data)
5999 {
6000         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6001         struct qeth_ipa_caps *caps = reply->param;
6002
6003         if (qeth_setassparms_inspect_rc(cmd))
6004                 return -EIO;
6005
6006         caps->supported = cmd->data.setassparms.data.caps.supported;
6007         caps->enabled = cmd->data.setassparms.data.caps.enabled;
6008         return 0;
6009 }
6010
6011 int qeth_setassparms_cb(struct qeth_card *card,
6012                         struct qeth_reply *reply, unsigned long data)
6013 {
6014         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6015
6016         QETH_CARD_TEXT(card, 4, "defadpcb");
6017
6018         if (cmd->hdr.return_code)
6019                 return -EIO;
6020
6021         cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
6022         if (cmd->hdr.prot_version == QETH_PROT_IPV4)
6023                 card->options.ipa4.enabled = cmd->hdr.assists.enabled;
6024         if (cmd->hdr.prot_version == QETH_PROT_IPV6)
6025                 card->options.ipa6.enabled = cmd->hdr.assists.enabled;
6026         return 0;
6027 }
6028 EXPORT_SYMBOL_GPL(qeth_setassparms_cb);
6029
6030 struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card,
6031                                                  enum qeth_ipa_funcs ipa_func,
6032                                                  u16 cmd_code,
6033                                                  unsigned int data_length,
6034                                                  enum qeth_prot_versions prot)
6035 {
6036         struct qeth_ipacmd_setassparms *setassparms;
6037         struct qeth_ipacmd_setassparms_hdr *hdr;
6038         struct qeth_cmd_buffer *iob;
6039
6040         QETH_CARD_TEXT(card, 4, "getasscm");
6041         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETASSPARMS, prot,
6042                                  data_length +
6043                                  offsetof(struct qeth_ipacmd_setassparms,
6044                                           data));
6045         if (!iob)
6046                 return NULL;
6047
6048         setassparms = &__ipa_cmd(iob)->data.setassparms;
6049         setassparms->assist_no = ipa_func;
6050
6051         hdr = &setassparms->hdr;
6052         hdr->length = sizeof(*hdr) + data_length;
6053         hdr->command_code = cmd_code;
6054         return iob;
6055 }
6056 EXPORT_SYMBOL_GPL(qeth_get_setassparms_cmd);
6057
6058 int qeth_send_simple_setassparms_prot(struct qeth_card *card,
6059                                       enum qeth_ipa_funcs ipa_func,
6060                                       u16 cmd_code, u32 *data,
6061                                       enum qeth_prot_versions prot)
6062 {
6063         unsigned int length = data ? SETASS_DATA_SIZEOF(flags_32bit) : 0;
6064         struct qeth_cmd_buffer *iob;
6065
6066         QETH_CARD_TEXT_(card, 4, "simassp%i", prot);
6067         iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code, length, prot);
6068         if (!iob)
6069                 return -ENOMEM;
6070
6071         if (data)
6072                 __ipa_cmd(iob)->data.setassparms.data.flags_32bit = *data;
6073         return qeth_send_ipa_cmd(card, iob, qeth_setassparms_cb, NULL);
6074 }
6075 EXPORT_SYMBOL_GPL(qeth_send_simple_setassparms_prot);
6076
6077 static void qeth_unregister_dbf_views(void)
6078 {
6079         int x;
6080
6081         for (x = 0; x < QETH_DBF_INFOS; x++) {
6082                 debug_unregister(qeth_dbf[x].id);
6083                 qeth_dbf[x].id = NULL;
6084         }
6085 }
6086
6087 void qeth_dbf_longtext(debug_info_t *id, int level, char *fmt, ...)
6088 {
6089         char dbf_txt_buf[32];
6090         va_list args;
6091
6092         if (!debug_level_enabled(id, level))
6093                 return;
6094         va_start(args, fmt);
6095         vsnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
6096         va_end(args);
6097         debug_text_event(id, level, dbf_txt_buf);
6098 }
6099 EXPORT_SYMBOL_GPL(qeth_dbf_longtext);
6100
6101 static int qeth_register_dbf_views(void)
6102 {
6103         int ret;
6104         int x;
6105
6106         for (x = 0; x < QETH_DBF_INFOS; x++) {
6107                 /* register the areas */
6108                 qeth_dbf[x].id = debug_register(qeth_dbf[x].name,
6109                                                 qeth_dbf[x].pages,
6110                                                 qeth_dbf[x].areas,
6111                                                 qeth_dbf[x].len);
6112                 if (qeth_dbf[x].id == NULL) {
6113                         qeth_unregister_dbf_views();
6114                         return -ENOMEM;
6115                 }
6116
6117                 /* register a view */
6118                 ret = debug_register_view(qeth_dbf[x].id, qeth_dbf[x].view);
6119                 if (ret) {
6120                         qeth_unregister_dbf_views();
6121                         return ret;
6122                 }
6123
6124                 /* set a passing level */
6125                 debug_set_level(qeth_dbf[x].id, qeth_dbf[x].level);
6126         }
6127
6128         return 0;
6129 }
6130
6131 static DEFINE_MUTEX(qeth_mod_mutex);    /* for synchronized module loading */
6132
6133 int qeth_core_load_discipline(struct qeth_card *card,
6134                 enum qeth_discipline_id discipline)
6135 {
6136         mutex_lock(&qeth_mod_mutex);
6137         switch (discipline) {
6138         case QETH_DISCIPLINE_LAYER3:
6139                 card->discipline = try_then_request_module(
6140                         symbol_get(qeth_l3_discipline), "qeth_l3");
6141                 break;
6142         case QETH_DISCIPLINE_LAYER2:
6143                 card->discipline = try_then_request_module(
6144                         symbol_get(qeth_l2_discipline), "qeth_l2");
6145                 break;
6146         default:
6147                 break;
6148         }
6149         mutex_unlock(&qeth_mod_mutex);
6150
6151         if (!card->discipline) {
6152                 dev_err(&card->gdev->dev, "There is no kernel module to "
6153                         "support discipline %d\n", discipline);
6154                 return -EINVAL;
6155         }
6156
6157         card->options.layer = discipline;
6158         return 0;
6159 }
6160
6161 void qeth_core_free_discipline(struct qeth_card *card)
6162 {
6163         if (IS_LAYER2(card))
6164                 symbol_put(qeth_l2_discipline);
6165         else
6166                 symbol_put(qeth_l3_discipline);
6167         card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
6168         card->discipline = NULL;
6169 }
6170
6171 const struct device_type qeth_generic_devtype = {
6172         .name = "qeth_generic",
6173         .groups = qeth_generic_attr_groups,
6174 };
6175 EXPORT_SYMBOL_GPL(qeth_generic_devtype);
6176
6177 static const struct device_type qeth_osn_devtype = {
6178         .name = "qeth_osn",
6179         .groups = qeth_osn_attr_groups,
6180 };
6181
6182 #define DBF_NAME_LEN    20
6183
6184 struct qeth_dbf_entry {
6185         char dbf_name[DBF_NAME_LEN];
6186         debug_info_t *dbf_info;
6187         struct list_head dbf_list;
6188 };
6189
6190 static LIST_HEAD(qeth_dbf_list);
6191 static DEFINE_MUTEX(qeth_dbf_list_mutex);
6192
6193 static debug_info_t *qeth_get_dbf_entry(char *name)
6194 {
6195         struct qeth_dbf_entry *entry;
6196         debug_info_t *rc = NULL;
6197
6198         mutex_lock(&qeth_dbf_list_mutex);
6199         list_for_each_entry(entry, &qeth_dbf_list, dbf_list) {
6200                 if (strcmp(entry->dbf_name, name) == 0) {
6201                         rc = entry->dbf_info;
6202                         break;
6203                 }
6204         }
6205         mutex_unlock(&qeth_dbf_list_mutex);
6206         return rc;
6207 }
6208
6209 static int qeth_add_dbf_entry(struct qeth_card *card, char *name)
6210 {
6211         struct qeth_dbf_entry *new_entry;
6212
6213         card->debug = debug_register(name, 2, 1, 8);
6214         if (!card->debug) {
6215                 QETH_DBF_TEXT_(SETUP, 2, "%s", "qcdbf");
6216                 goto err;
6217         }
6218         if (debug_register_view(card->debug, &debug_hex_ascii_view))
6219                 goto err_dbg;
6220         new_entry = kzalloc(sizeof(struct qeth_dbf_entry), GFP_KERNEL);
6221         if (!new_entry)
6222                 goto err_dbg;
6223         strncpy(new_entry->dbf_name, name, DBF_NAME_LEN);
6224         new_entry->dbf_info = card->debug;
6225         mutex_lock(&qeth_dbf_list_mutex);
6226         list_add(&new_entry->dbf_list, &qeth_dbf_list);
6227         mutex_unlock(&qeth_dbf_list_mutex);
6228
6229         return 0;
6230
6231 err_dbg:
6232         debug_unregister(card->debug);
6233 err:
6234         return -ENOMEM;
6235 }
6236
6237 static void qeth_clear_dbf_list(void)
6238 {
6239         struct qeth_dbf_entry *entry, *tmp;
6240
6241         mutex_lock(&qeth_dbf_list_mutex);
6242         list_for_each_entry_safe(entry, tmp, &qeth_dbf_list, dbf_list) {
6243                 list_del(&entry->dbf_list);
6244                 debug_unregister(entry->dbf_info);
6245                 kfree(entry);
6246         }
6247         mutex_unlock(&qeth_dbf_list_mutex);
6248 }
6249
6250 static struct net_device *qeth_alloc_netdev(struct qeth_card *card)
6251 {
6252         struct net_device *dev;
6253         struct qeth_priv *priv;
6254
6255         switch (card->info.type) {
6256         case QETH_CARD_TYPE_IQD:
6257                 dev = alloc_netdev_mqs(sizeof(*priv), "hsi%d", NET_NAME_UNKNOWN,
6258                                        ether_setup, QETH_MAX_OUT_QUEUES, 1);
6259                 break;
6260         case QETH_CARD_TYPE_OSM:
6261                 dev = alloc_etherdev(sizeof(*priv));
6262                 break;
6263         case QETH_CARD_TYPE_OSN:
6264                 dev = alloc_netdev(sizeof(*priv), "osn%d", NET_NAME_UNKNOWN,
6265                                    ether_setup);
6266                 break;
6267         default:
6268                 dev = alloc_etherdev_mqs(sizeof(*priv), QETH_MAX_OUT_QUEUES, 1);
6269         }
6270
6271         if (!dev)
6272                 return NULL;
6273
6274         priv = netdev_priv(dev);
6275         priv->rx_copybreak = QETH_RX_COPYBREAK;
6276         priv->tx_wanted_queues = IS_IQD(card) ? QETH_IQD_MIN_TXQ : 1;
6277
6278         dev->ml_priv = card;
6279         dev->watchdog_timeo = QETH_TX_TIMEOUT;
6280         dev->min_mtu = IS_OSN(card) ? 64 : 576;
6281          /* initialized when device first goes online: */
6282         dev->max_mtu = 0;
6283         dev->mtu = 0;
6284         SET_NETDEV_DEV(dev, &card->gdev->dev);
6285         netif_carrier_off(dev);
6286
6287         if (IS_OSN(card)) {
6288                 dev->ethtool_ops = &qeth_osn_ethtool_ops;
6289         } else {
6290                 dev->ethtool_ops = &qeth_ethtool_ops;
6291                 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
6292                 dev->hw_features |= NETIF_F_SG;
6293                 dev->vlan_features |= NETIF_F_SG;
6294                 if (IS_IQD(card))
6295                         dev->features |= NETIF_F_SG;
6296         }
6297
6298         return dev;
6299 }
6300
6301 struct net_device *qeth_clone_netdev(struct net_device *orig)
6302 {
6303         struct net_device *clone = qeth_alloc_netdev(orig->ml_priv);
6304
6305         if (!clone)
6306                 return NULL;
6307
6308         clone->dev_port = orig->dev_port;
6309         return clone;
6310 }
6311
6312 static int qeth_core_probe_device(struct ccwgroup_device *gdev)
6313 {
6314         struct qeth_card *card;
6315         struct device *dev;
6316         int rc;
6317         enum qeth_discipline_id enforced_disc;
6318         char dbf_name[DBF_NAME_LEN];
6319
6320         QETH_DBF_TEXT(SETUP, 2, "probedev");
6321
6322         dev = &gdev->dev;
6323         if (!get_device(dev))
6324                 return -ENODEV;
6325
6326         QETH_DBF_TEXT_(SETUP, 2, "%s", dev_name(&gdev->dev));
6327
6328         card = qeth_alloc_card(gdev);
6329         if (!card) {
6330                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM);
6331                 rc = -ENOMEM;
6332                 goto err_dev;
6333         }
6334
6335         snprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
6336                 dev_name(&gdev->dev));
6337         card->debug = qeth_get_dbf_entry(dbf_name);
6338         if (!card->debug) {
6339                 rc = qeth_add_dbf_entry(card, dbf_name);
6340                 if (rc)
6341                         goto err_card;
6342         }
6343
6344         qeth_setup_card(card);
6345         card->dev = qeth_alloc_netdev(card);
6346         if (!card->dev) {
6347                 rc = -ENOMEM;
6348                 goto err_card;
6349         }
6350
6351         qeth_determine_capabilities(card);
6352         qeth_set_blkt_defaults(card);
6353
6354         card->qdio.no_out_queues = card->dev->num_tx_queues;
6355         rc = qeth_update_from_chp_desc(card);
6356         if (rc)
6357                 goto err_chp_desc;
6358
6359         enforced_disc = qeth_enforce_discipline(card);
6360         switch (enforced_disc) {
6361         case QETH_DISCIPLINE_UNDETERMINED:
6362                 gdev->dev.type = &qeth_generic_devtype;
6363                 break;
6364         default:
6365                 card->info.layer_enforced = true;
6366                 /* It's so early that we don't need the discipline_mutex yet. */
6367                 rc = qeth_core_load_discipline(card, enforced_disc);
6368                 if (rc)
6369                         goto err_load;
6370
6371                 gdev->dev.type = IS_OSN(card) ? &qeth_osn_devtype :
6372                                                 card->discipline->devtype;
6373                 rc = card->discipline->setup(card->gdev);
6374                 if (rc)
6375                         goto err_disc;
6376                 break;
6377         }
6378
6379         return 0;
6380
6381 err_disc:
6382         qeth_core_free_discipline(card);
6383 err_load:
6384 err_chp_desc:
6385         free_netdev(card->dev);
6386 err_card:
6387         qeth_core_free_card(card);
6388 err_dev:
6389         put_device(dev);
6390         return rc;
6391 }
6392
6393 static void qeth_core_remove_device(struct ccwgroup_device *gdev)
6394 {
6395         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6396
6397         QETH_CARD_TEXT(card, 2, "removedv");
6398
6399         mutex_lock(&card->discipline_mutex);
6400         if (card->discipline) {
6401                 card->discipline->remove(gdev);
6402                 qeth_core_free_discipline(card);
6403         }
6404         mutex_unlock(&card->discipline_mutex);
6405
6406         qeth_free_qdio_queues(card);
6407
6408         free_netdev(card->dev);
6409         qeth_core_free_card(card);
6410         put_device(&gdev->dev);
6411 }
6412
6413 static int qeth_core_set_online(struct ccwgroup_device *gdev)
6414 {
6415         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6416         int rc = 0;
6417         enum qeth_discipline_id def_discipline;
6418
6419         mutex_lock(&card->discipline_mutex);
6420         if (!card->discipline) {
6421                 def_discipline = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
6422                                                 QETH_DISCIPLINE_LAYER2;
6423                 rc = qeth_core_load_discipline(card, def_discipline);
6424                 if (rc)
6425                         goto err;
6426                 rc = card->discipline->setup(card->gdev);
6427                 if (rc) {
6428                         qeth_core_free_discipline(card);
6429                         goto err;
6430                 }
6431         }
6432
6433         rc = qeth_set_online(card, card->discipline);
6434
6435 err:
6436         mutex_unlock(&card->discipline_mutex);
6437         return rc;
6438 }
6439
6440 static int qeth_core_set_offline(struct ccwgroup_device *gdev)
6441 {
6442         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6443         int rc;
6444
6445         mutex_lock(&card->discipline_mutex);
6446         rc = qeth_set_offline(card, card->discipline, false);
6447         mutex_unlock(&card->discipline_mutex);
6448
6449         return rc;
6450 }
6451
6452 static void qeth_core_shutdown(struct ccwgroup_device *gdev)
6453 {
6454         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6455
6456         qeth_set_allowed_threads(card, 0, 1);
6457         if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
6458                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
6459         qeth_qdio_clear_card(card, 0);
6460         qeth_drain_output_queues(card);
6461         qdio_free(CARD_DDEV(card));
6462 }
6463
6464 static ssize_t group_store(struct device_driver *ddrv, const char *buf,
6465                            size_t count)
6466 {
6467         int err;
6468
6469         err = ccwgroup_create_dev(qeth_core_root_dev, to_ccwgroupdrv(ddrv), 3,
6470                                   buf);
6471
6472         return err ? err : count;
6473 }
6474 static DRIVER_ATTR_WO(group);
6475
6476 static struct attribute *qeth_drv_attrs[] = {
6477         &driver_attr_group.attr,
6478         NULL,
6479 };
6480 static struct attribute_group qeth_drv_attr_group = {
6481         .attrs = qeth_drv_attrs,
6482 };
6483 static const struct attribute_group *qeth_drv_attr_groups[] = {
6484         &qeth_drv_attr_group,
6485         NULL,
6486 };
6487
6488 static struct ccwgroup_driver qeth_core_ccwgroup_driver = {
6489         .driver = {
6490                 .groups = qeth_drv_attr_groups,
6491                 .owner = THIS_MODULE,
6492                 .name = "qeth",
6493         },
6494         .ccw_driver = &qeth_ccw_driver,
6495         .setup = qeth_core_probe_device,
6496         .remove = qeth_core_remove_device,
6497         .set_online = qeth_core_set_online,
6498         .set_offline = qeth_core_set_offline,
6499         .shutdown = qeth_core_shutdown,
6500 };
6501
6502 struct qeth_card *qeth_get_card_by_busid(char *bus_id)
6503 {
6504         struct ccwgroup_device *gdev;
6505         struct qeth_card *card;
6506
6507         gdev = get_ccwgroupdev_by_busid(&qeth_core_ccwgroup_driver, bus_id);
6508         if (!gdev)
6509                 return NULL;
6510
6511         card = dev_get_drvdata(&gdev->dev);
6512         put_device(&gdev->dev);
6513         return card;
6514 }
6515 EXPORT_SYMBOL_GPL(qeth_get_card_by_busid);
6516
6517 int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
6518 {
6519         struct qeth_card *card = dev->ml_priv;
6520         struct mii_ioctl_data *mii_data;
6521         int rc = 0;
6522
6523         switch (cmd) {
6524         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
6525                 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
6526                 break;
6527         case SIOC_QETH_GET_CARD_TYPE:
6528                 if ((IS_OSD(card) || IS_OSM(card) || IS_OSX(card)) &&
6529                     !IS_VM_NIC(card))
6530                         return 1;
6531                 return 0;
6532         case SIOCGMIIPHY:
6533                 mii_data = if_mii(rq);
6534                 mii_data->phy_id = 0;
6535                 break;
6536         case SIOCGMIIREG:
6537                 mii_data = if_mii(rq);
6538                 if (mii_data->phy_id != 0)
6539                         rc = -EINVAL;
6540                 else
6541                         mii_data->val_out = qeth_mdio_read(dev,
6542                                 mii_data->phy_id, mii_data->reg_num);
6543                 break;
6544         case SIOC_QETH_QUERY_OAT:
6545                 rc = qeth_query_oat_command(card, rq->ifr_ifru.ifru_data);
6546                 break;
6547         default:
6548                 if (card->discipline->do_ioctl)
6549                         rc = card->discipline->do_ioctl(dev, rq, cmd);
6550                 else
6551                         rc = -EOPNOTSUPP;
6552         }
6553         if (rc)
6554                 QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
6555         return rc;
6556 }
6557 EXPORT_SYMBOL_GPL(qeth_do_ioctl);
6558
6559 static int qeth_start_csum_cb(struct qeth_card *card, struct qeth_reply *reply,
6560                               unsigned long data)
6561 {
6562         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6563         u32 *features = reply->param;
6564
6565         if (qeth_setassparms_inspect_rc(cmd))
6566                 return -EIO;
6567
6568         *features = cmd->data.setassparms.data.flags_32bit;
6569         return 0;
6570 }
6571
6572 static int qeth_set_csum_off(struct qeth_card *card, enum qeth_ipa_funcs cstype,
6573                              enum qeth_prot_versions prot)
6574 {
6575         return qeth_send_simple_setassparms_prot(card, cstype, IPA_CMD_ASS_STOP,
6576                                                  NULL, prot);
6577 }
6578
6579 static int qeth_set_csum_on(struct qeth_card *card, enum qeth_ipa_funcs cstype,
6580                             enum qeth_prot_versions prot, u8 *lp2lp)
6581 {
6582         u32 required_features = QETH_IPA_CHECKSUM_UDP | QETH_IPA_CHECKSUM_TCP;
6583         struct qeth_cmd_buffer *iob;
6584         struct qeth_ipa_caps caps;
6585         u32 features;
6586         int rc;
6587
6588         /* some L3 HW requires combined L3+L4 csum offload: */
6589         if (IS_LAYER3(card) && prot == QETH_PROT_IPV4 &&
6590             cstype == IPA_OUTBOUND_CHECKSUM)
6591                 required_features |= QETH_IPA_CHECKSUM_IP_HDR;
6592
6593         iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_START, 0,
6594                                        prot);
6595         if (!iob)
6596                 return -ENOMEM;
6597
6598         rc = qeth_send_ipa_cmd(card, iob, qeth_start_csum_cb, &features);
6599         if (rc)
6600                 return rc;
6601
6602         if ((required_features & features) != required_features) {
6603                 qeth_set_csum_off(card, cstype, prot);
6604                 return -EOPNOTSUPP;
6605         }
6606
6607         iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_ENABLE,
6608                                        SETASS_DATA_SIZEOF(flags_32bit),
6609                                        prot);
6610         if (!iob) {
6611                 qeth_set_csum_off(card, cstype, prot);
6612                 return -ENOMEM;
6613         }
6614
6615         if (features & QETH_IPA_CHECKSUM_LP2LP)
6616                 required_features |= QETH_IPA_CHECKSUM_LP2LP;
6617         __ipa_cmd(iob)->data.setassparms.data.flags_32bit = required_features;
6618         rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6619         if (rc) {
6620                 qeth_set_csum_off(card, cstype, prot);
6621                 return rc;
6622         }
6623
6624         if (!qeth_ipa_caps_supported(&caps, required_features) ||
6625             !qeth_ipa_caps_enabled(&caps, required_features)) {
6626                 qeth_set_csum_off(card, cstype, prot);
6627                 return -EOPNOTSUPP;
6628         }
6629
6630         dev_info(&card->gdev->dev, "HW Checksumming (%sbound IPv%d) enabled\n",
6631                  cstype == IPA_INBOUND_CHECKSUM ? "in" : "out", prot);
6632
6633         if (lp2lp)
6634                 *lp2lp = qeth_ipa_caps_enabled(&caps, QETH_IPA_CHECKSUM_LP2LP);
6635
6636         return 0;
6637 }
6638
6639 static int qeth_set_ipa_csum(struct qeth_card *card, bool on, int cstype,
6640                              enum qeth_prot_versions prot, u8 *lp2lp)
6641 {
6642         return on ? qeth_set_csum_on(card, cstype, prot, lp2lp) :
6643                     qeth_set_csum_off(card, cstype, prot);
6644 }
6645
6646 static int qeth_start_tso_cb(struct qeth_card *card, struct qeth_reply *reply,
6647                              unsigned long data)
6648 {
6649         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6650         struct qeth_tso_start_data *tso_data = reply->param;
6651
6652         if (qeth_setassparms_inspect_rc(cmd))
6653                 return -EIO;
6654
6655         tso_data->mss = cmd->data.setassparms.data.tso.mss;
6656         tso_data->supported = cmd->data.setassparms.data.tso.supported;
6657         return 0;
6658 }
6659
6660 static int qeth_set_tso_off(struct qeth_card *card,
6661                             enum qeth_prot_versions prot)
6662 {
6663         return qeth_send_simple_setassparms_prot(card, IPA_OUTBOUND_TSO,
6664                                                  IPA_CMD_ASS_STOP, NULL, prot);
6665 }
6666
6667 static int qeth_set_tso_on(struct qeth_card *card,
6668                            enum qeth_prot_versions prot)
6669 {
6670         struct qeth_tso_start_data tso_data;
6671         struct qeth_cmd_buffer *iob;
6672         struct qeth_ipa_caps caps;
6673         int rc;
6674
6675         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6676                                        IPA_CMD_ASS_START, 0, prot);
6677         if (!iob)
6678                 return -ENOMEM;
6679
6680         rc = qeth_send_ipa_cmd(card, iob, qeth_start_tso_cb, &tso_data);
6681         if (rc)
6682                 return rc;
6683
6684         if (!tso_data.mss || !(tso_data.supported & QETH_IPA_LARGE_SEND_TCP)) {
6685                 qeth_set_tso_off(card, prot);
6686                 return -EOPNOTSUPP;
6687         }
6688
6689         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6690                                        IPA_CMD_ASS_ENABLE,
6691                                        SETASS_DATA_SIZEOF(caps), prot);
6692         if (!iob) {
6693                 qeth_set_tso_off(card, prot);
6694                 return -ENOMEM;
6695         }
6696
6697         /* enable TSO capability */
6698         __ipa_cmd(iob)->data.setassparms.data.caps.enabled =
6699                 QETH_IPA_LARGE_SEND_TCP;
6700         rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6701         if (rc) {
6702                 qeth_set_tso_off(card, prot);
6703                 return rc;
6704         }
6705
6706         if (!qeth_ipa_caps_supported(&caps, QETH_IPA_LARGE_SEND_TCP) ||
6707             !qeth_ipa_caps_enabled(&caps, QETH_IPA_LARGE_SEND_TCP)) {
6708                 qeth_set_tso_off(card, prot);
6709                 return -EOPNOTSUPP;
6710         }
6711
6712         dev_info(&card->gdev->dev, "TSOv%u enabled (MSS: %u)\n", prot,
6713                  tso_data.mss);
6714         return 0;
6715 }
6716
6717 static int qeth_set_ipa_tso(struct qeth_card *card, bool on,
6718                             enum qeth_prot_versions prot)
6719 {
6720         return on ? qeth_set_tso_on(card, prot) : qeth_set_tso_off(card, prot);
6721 }
6722
6723 static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on)
6724 {
6725         int rc_ipv4 = (on) ? -EOPNOTSUPP : 0;
6726         int rc_ipv6;
6727
6728         if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
6729                 rc_ipv4 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6730                                             QETH_PROT_IPV4, NULL);
6731         if (!qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6732                 /* no/one Offload Assist available, so the rc is trivial */
6733                 return rc_ipv4;
6734
6735         rc_ipv6 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6736                                     QETH_PROT_IPV6, NULL);
6737
6738         if (on)
6739                 /* enable: success if any Assist is active */
6740                 return (rc_ipv6) ? rc_ipv4 : 0;
6741
6742         /* disable: failure if any Assist is still active */
6743         return (rc_ipv6) ? rc_ipv6 : rc_ipv4;
6744 }
6745
6746 /**
6747  * qeth_enable_hw_features() - (Re-)Enable HW functions for device features
6748  * @dev:        a net_device
6749  */
6750 void qeth_enable_hw_features(struct net_device *dev)
6751 {
6752         struct qeth_card *card = dev->ml_priv;
6753         netdev_features_t features;
6754
6755         features = dev->features;
6756         /* force-off any feature that might need an IPA sequence.
6757          * netdev_update_features() will restart them.
6758          */
6759         dev->features &= ~dev->hw_features;
6760         /* toggle VLAN filter, so that VIDs are re-programmed: */
6761         if (IS_LAYER2(card) && IS_VM_NIC(card)) {
6762                 dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
6763                 dev->wanted_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
6764         }
6765         netdev_update_features(dev);
6766         if (features != dev->features)
6767                 dev_warn(&card->gdev->dev,
6768                          "Device recovery failed to restore all offload features\n");
6769 }
6770 EXPORT_SYMBOL_GPL(qeth_enable_hw_features);
6771
6772 static void qeth_check_restricted_features(struct qeth_card *card,
6773                                            netdev_features_t changed,
6774                                            netdev_features_t actual)
6775 {
6776         netdev_features_t ipv6_features = NETIF_F_TSO6;
6777         netdev_features_t ipv4_features = NETIF_F_TSO;
6778
6779         if (!card->info.has_lp2lp_cso_v6)
6780                 ipv6_features |= NETIF_F_IPV6_CSUM;
6781         if (!card->info.has_lp2lp_cso_v4)
6782                 ipv4_features |= NETIF_F_IP_CSUM;
6783
6784         if ((changed & ipv6_features) && !(actual & ipv6_features))
6785                 qeth_flush_local_addrs6(card);
6786         if ((changed & ipv4_features) && !(actual & ipv4_features))
6787                 qeth_flush_local_addrs4(card);
6788 }
6789
6790 int qeth_set_features(struct net_device *dev, netdev_features_t features)
6791 {
6792         struct qeth_card *card = dev->ml_priv;
6793         netdev_features_t changed = dev->features ^ features;
6794         int rc = 0;
6795
6796         QETH_CARD_TEXT(card, 2, "setfeat");
6797         QETH_CARD_HEX(card, 2, &features, sizeof(features));
6798
6799         if ((changed & NETIF_F_IP_CSUM)) {
6800                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IP_CSUM,
6801                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV4,
6802                                        &card->info.has_lp2lp_cso_v4);
6803                 if (rc)
6804                         changed ^= NETIF_F_IP_CSUM;
6805         }
6806         if (changed & NETIF_F_IPV6_CSUM) {
6807                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IPV6_CSUM,
6808                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV6,
6809                                        &card->info.has_lp2lp_cso_v6);
6810                 if (rc)
6811                         changed ^= NETIF_F_IPV6_CSUM;
6812         }
6813         if (changed & NETIF_F_RXCSUM) {
6814                 rc = qeth_set_ipa_rx_csum(card, features & NETIF_F_RXCSUM);
6815                 if (rc)
6816                         changed ^= NETIF_F_RXCSUM;
6817         }
6818         if (changed & NETIF_F_TSO) {
6819                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO,
6820                                       QETH_PROT_IPV4);
6821                 if (rc)
6822                         changed ^= NETIF_F_TSO;
6823         }
6824         if (changed & NETIF_F_TSO6) {
6825                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO6,
6826                                       QETH_PROT_IPV6);
6827                 if (rc)
6828                         changed ^= NETIF_F_TSO6;
6829         }
6830
6831         qeth_check_restricted_features(card, dev->features ^ features,
6832                                        dev->features ^ changed);
6833
6834         /* everything changed successfully? */
6835         if ((dev->features ^ features) == changed)
6836                 return 0;
6837         /* something went wrong. save changed features and return error */
6838         dev->features ^= changed;
6839         return -EIO;
6840 }
6841 EXPORT_SYMBOL_GPL(qeth_set_features);
6842
6843 netdev_features_t qeth_fix_features(struct net_device *dev,
6844                                     netdev_features_t features)
6845 {
6846         struct qeth_card *card = dev->ml_priv;
6847
6848         QETH_CARD_TEXT(card, 2, "fixfeat");
6849         if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM))
6850                 features &= ~NETIF_F_IP_CSUM;
6851         if (!qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6))
6852                 features &= ~NETIF_F_IPV6_CSUM;
6853         if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM) &&
6854             !qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6855                 features &= ~NETIF_F_RXCSUM;
6856         if (!qeth_is_supported(card, IPA_OUTBOUND_TSO))
6857                 features &= ~NETIF_F_TSO;
6858         if (!qeth_is_supported6(card, IPA_OUTBOUND_TSO))
6859                 features &= ~NETIF_F_TSO6;
6860
6861         QETH_CARD_HEX(card, 2, &features, sizeof(features));
6862         return features;
6863 }
6864 EXPORT_SYMBOL_GPL(qeth_fix_features);
6865
6866 netdev_features_t qeth_features_check(struct sk_buff *skb,
6867                                       struct net_device *dev,
6868                                       netdev_features_t features)
6869 {
6870         struct qeth_card *card = dev->ml_priv;
6871
6872         /* Traffic with local next-hop is not eligible for some offloads: */
6873         if (skb->ip_summed == CHECKSUM_PARTIAL &&
6874             READ_ONCE(card->options.isolation) != ISOLATION_MODE_FWD) {
6875                 netdev_features_t restricted = 0;
6876
6877                 if (skb_is_gso(skb) && !netif_needs_gso(skb, features))
6878                         restricted |= NETIF_F_ALL_TSO;
6879
6880                 switch (vlan_get_protocol(skb)) {
6881                 case htons(ETH_P_IP):
6882                         if (!card->info.has_lp2lp_cso_v4)
6883                                 restricted |= NETIF_F_IP_CSUM;
6884
6885                         if (restricted && qeth_next_hop_is_local_v4(card, skb))
6886                                 features &= ~restricted;
6887                         break;
6888                 case htons(ETH_P_IPV6):
6889                         if (!card->info.has_lp2lp_cso_v6)
6890                                 restricted |= NETIF_F_IPV6_CSUM;
6891
6892                         if (restricted && qeth_next_hop_is_local_v6(card, skb))
6893                                 features &= ~restricted;
6894                         break;
6895                 default:
6896                         break;
6897                 }
6898         }
6899
6900         /* GSO segmentation builds skbs with
6901          *      a (small) linear part for the headers, and
6902          *      page frags for the data.
6903          * Compared to a linear skb, the header-only part consumes an
6904          * additional buffer element. This reduces buffer utilization, and
6905          * hurts throughput. So compress small segments into one element.
6906          */
6907         if (netif_needs_gso(skb, features)) {
6908                 /* match skb_segment(): */
6909                 unsigned int doffset = skb->data - skb_mac_header(skb);
6910                 unsigned int hsize = skb_shinfo(skb)->gso_size;
6911                 unsigned int hroom = skb_headroom(skb);
6912
6913                 /* linearize only if resulting skb allocations are order-0: */
6914                 if (SKB_DATA_ALIGN(hroom + doffset + hsize) <= SKB_MAX_HEAD(0))
6915                         features &= ~NETIF_F_SG;
6916         }
6917
6918         return vlan_features_check(skb, features);
6919 }
6920 EXPORT_SYMBOL_GPL(qeth_features_check);
6921
6922 void qeth_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
6923 {
6924         struct qeth_card *card = dev->ml_priv;
6925         struct qeth_qdio_out_q *queue;
6926         unsigned int i;
6927
6928         QETH_CARD_TEXT(card, 5, "getstat");
6929
6930         stats->rx_packets = card->stats.rx_packets;
6931         stats->rx_bytes = card->stats.rx_bytes;
6932         stats->rx_errors = card->stats.rx_length_errors +
6933                            card->stats.rx_frame_errors +
6934                            card->stats.rx_fifo_errors;
6935         stats->rx_dropped = card->stats.rx_dropped_nomem +
6936                             card->stats.rx_dropped_notsupp +
6937                             card->stats.rx_dropped_runt;
6938         stats->multicast = card->stats.rx_multicast;
6939         stats->rx_length_errors = card->stats.rx_length_errors;
6940         stats->rx_frame_errors = card->stats.rx_frame_errors;
6941         stats->rx_fifo_errors = card->stats.rx_fifo_errors;
6942
6943         for (i = 0; i < card->qdio.no_out_queues; i++) {
6944                 queue = card->qdio.out_qs[i];
6945
6946                 stats->tx_packets += queue->stats.tx_packets;
6947                 stats->tx_bytes += queue->stats.tx_bytes;
6948                 stats->tx_errors += queue->stats.tx_errors;
6949                 stats->tx_dropped += queue->stats.tx_dropped;
6950         }
6951 }
6952 EXPORT_SYMBOL_GPL(qeth_get_stats64);
6953
6954 #define TC_IQD_UCAST   0
6955 static void qeth_iqd_set_prio_tc_map(struct net_device *dev,
6956                                      unsigned int ucast_txqs)
6957 {
6958         unsigned int prio;
6959
6960         /* IQD requires mcast traffic to be placed on a dedicated queue, and
6961          * qeth_iqd_select_queue() deals with this.
6962          * For unicast traffic, we defer the queue selection to the stack.
6963          * By installing a trivial prio map that spans over only the unicast
6964          * queues, we can encourage the stack to spread the ucast traffic evenly
6965          * without selecting the mcast queue.
6966          */
6967
6968         /* One traffic class, spanning over all active ucast queues: */
6969         netdev_set_num_tc(dev, 1);
6970         netdev_set_tc_queue(dev, TC_IQD_UCAST, ucast_txqs,
6971                             QETH_IQD_MIN_UCAST_TXQ);
6972
6973         /* Map all priorities to this traffic class: */
6974         for (prio = 0; prio <= TC_BITMASK; prio++)
6975                 netdev_set_prio_tc_map(dev, prio, TC_IQD_UCAST);
6976 }
6977
6978 int qeth_set_real_num_tx_queues(struct qeth_card *card, unsigned int count)
6979 {
6980         struct net_device *dev = card->dev;
6981         int rc;
6982
6983         /* Per netif_setup_tc(), adjust the mapping first: */
6984         if (IS_IQD(card))
6985                 qeth_iqd_set_prio_tc_map(dev, count - 1);
6986
6987         rc = netif_set_real_num_tx_queues(dev, count);
6988
6989         if (rc && IS_IQD(card))
6990                 qeth_iqd_set_prio_tc_map(dev, dev->real_num_tx_queues - 1);
6991
6992         return rc;
6993 }
6994 EXPORT_SYMBOL_GPL(qeth_set_real_num_tx_queues);
6995
6996 u16 qeth_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
6997                           u8 cast_type, struct net_device *sb_dev)
6998 {
6999         u16 txq;
7000
7001         if (cast_type != RTN_UNICAST)
7002                 return QETH_IQD_MCAST_TXQ;
7003         if (dev->real_num_tx_queues == QETH_IQD_MIN_TXQ)
7004                 return QETH_IQD_MIN_UCAST_TXQ;
7005
7006         txq = netdev_pick_tx(dev, skb, sb_dev);
7007         return (txq == QETH_IQD_MCAST_TXQ) ? QETH_IQD_MIN_UCAST_TXQ : txq;
7008 }
7009 EXPORT_SYMBOL_GPL(qeth_iqd_select_queue);
7010
7011 int qeth_open(struct net_device *dev)
7012 {
7013         struct qeth_card *card = dev->ml_priv;
7014
7015         QETH_CARD_TEXT(card, 4, "qethopen");
7016
7017         card->data.state = CH_STATE_UP;
7018         netif_tx_start_all_queues(dev);
7019
7020         local_bh_disable();
7021         if (IS_IQD(card)) {
7022                 struct qeth_qdio_out_q *queue;
7023                 unsigned int i;
7024
7025                 qeth_for_each_output_queue(card, queue, i) {
7026                         netif_tx_napi_add(dev, &queue->napi, qeth_tx_poll,
7027                                           QETH_NAPI_WEIGHT);
7028                         napi_enable(&queue->napi);
7029                         napi_schedule(&queue->napi);
7030                 }
7031         }
7032
7033         napi_enable(&card->napi);
7034         napi_schedule(&card->napi);
7035         /* kick-start the NAPI softirq: */
7036         local_bh_enable();
7037
7038         return 0;
7039 }
7040 EXPORT_SYMBOL_GPL(qeth_open);
7041
7042 int qeth_stop(struct net_device *dev)
7043 {
7044         struct qeth_card *card = dev->ml_priv;
7045
7046         QETH_CARD_TEXT(card, 4, "qethstop");
7047
7048         napi_disable(&card->napi);
7049         cancel_delayed_work_sync(&card->buffer_reclaim_work);
7050         qdio_stop_irq(CARD_DDEV(card));
7051
7052         if (IS_IQD(card)) {
7053                 struct qeth_qdio_out_q *queue;
7054                 unsigned int i;
7055
7056                 /* Quiesce the NAPI instances: */
7057                 qeth_for_each_output_queue(card, queue, i)
7058                         napi_disable(&queue->napi);
7059
7060                 /* Stop .ndo_start_xmit, might still access queue->napi. */
7061                 netif_tx_disable(dev);
7062
7063                 qeth_for_each_output_queue(card, queue, i) {
7064                         del_timer_sync(&queue->timer);
7065                         /* Queues may get re-allocated, so remove the NAPIs. */
7066                         netif_napi_del(&queue->napi);
7067                 }
7068         } else {
7069                 netif_tx_disable(dev);
7070         }
7071
7072         return 0;
7073 }
7074 EXPORT_SYMBOL_GPL(qeth_stop);
7075
7076 static int __init qeth_core_init(void)
7077 {
7078         int rc;
7079
7080         pr_info("loading core functions\n");
7081
7082         qeth_debugfs_root = debugfs_create_dir("qeth", NULL);
7083
7084         rc = qeth_register_dbf_views();
7085         if (rc)
7086                 goto dbf_err;
7087         qeth_core_root_dev = root_device_register("qeth");
7088         rc = PTR_ERR_OR_ZERO(qeth_core_root_dev);
7089         if (rc)
7090                 goto register_err;
7091         qeth_core_header_cache =
7092                 kmem_cache_create("qeth_hdr", QETH_HDR_CACHE_OBJ_SIZE,
7093                                   roundup_pow_of_two(QETH_HDR_CACHE_OBJ_SIZE),
7094                                   0, NULL);
7095         if (!qeth_core_header_cache) {
7096                 rc = -ENOMEM;
7097                 goto slab_err;
7098         }
7099         qeth_qdio_outbuf_cache = kmem_cache_create("qeth_buf",
7100                         sizeof(struct qeth_qdio_out_buffer), 0, 0, NULL);
7101         if (!qeth_qdio_outbuf_cache) {
7102                 rc = -ENOMEM;
7103                 goto cqslab_err;
7104         }
7105         rc = ccw_driver_register(&qeth_ccw_driver);
7106         if (rc)
7107                 goto ccw_err;
7108         rc = ccwgroup_driver_register(&qeth_core_ccwgroup_driver);
7109         if (rc)
7110                 goto ccwgroup_err;
7111
7112         return 0;
7113
7114 ccwgroup_err:
7115         ccw_driver_unregister(&qeth_ccw_driver);
7116 ccw_err:
7117         kmem_cache_destroy(qeth_qdio_outbuf_cache);
7118 cqslab_err:
7119         kmem_cache_destroy(qeth_core_header_cache);
7120 slab_err:
7121         root_device_unregister(qeth_core_root_dev);
7122 register_err:
7123         qeth_unregister_dbf_views();
7124 dbf_err:
7125         debugfs_remove_recursive(qeth_debugfs_root);
7126         pr_err("Initializing the qeth device driver failed\n");
7127         return rc;
7128 }
7129
7130 static void __exit qeth_core_exit(void)
7131 {
7132         qeth_clear_dbf_list();
7133         ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver);
7134         ccw_driver_unregister(&qeth_ccw_driver);
7135         kmem_cache_destroy(qeth_qdio_outbuf_cache);
7136         kmem_cache_destroy(qeth_core_header_cache);
7137         root_device_unregister(qeth_core_root_dev);
7138         qeth_unregister_dbf_views();
7139         debugfs_remove_recursive(qeth_debugfs_root);
7140         pr_info("core functions removed\n");
7141 }
7142
7143 module_init(qeth_core_init);
7144 module_exit(qeth_core_exit);
7145 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
7146 MODULE_DESCRIPTION("qeth core functions");
7147 MODULE_LICENSE("GPL");