drivers/s390/net/qeth_core_main.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *    Copyright IBM Corp. 2007, 2009
   4  *    Author(s): Utz Bacher <[email protected]>,
   5  *               Frank Pavlic <[email protected]>,
   6  *               Thomas Spatzier <[email protected]>,
   7  *               Frank Blaschka <[email protected]>
   8  */
   9
  10 #define KMSG_COMPONENT "qeth"
  11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  12
  13 #include <linux/compat.h>
  14 #include <linux/module.h>
  15 #include <linux/moduleparam.h>
  16 #include <linux/string.h>
  17 #include <linux/errno.h>
  18 #include <linux/kernel.h>
  19 #include <linux/log2.h>
  20 #include <linux/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         for (i = 0; i < ARRAY_SIZE(queue->bufs); i++)
 214                 queue->bufs[i].pool_entry = NULL;
 215 }
 216
 217 static void qeth_free_pool_entry(struct qeth_buffer_pool_entry *entry)
 218 {
 219         unsigned int i;
 220
 221         for (i = 0; i < ARRAY_SIZE(entry->elements); i++) {
 222                 if (entry->elements[i])
 223                         __free_page(entry->elements[i]);
 224         }
 225
 226         kfree(entry);
 227 }
 228
 229 static void qeth_free_buffer_pool(struct qeth_card *card)
 230 {
 231         struct qeth_buffer_pool_entry *entry, *tmp;
 232
 233         list_for_each_entry_safe(entry, tmp, &card->qdio.init_pool.entry_list,
 234                                  init_list) {
 235                 list_del(&entry->init_list);
 236                 qeth_free_pool_entry(entry);
 237         }
 238 }
 239
 240 static struct qeth_buffer_pool_entry *qeth_alloc_pool_entry(unsigned int pages)
 241 {
 242         struct qeth_buffer_pool_entry *entry;
 243         unsigned int i;
 244
 245         entry = kzalloc(sizeof(*entry), GFP_KERNEL);
 246         if (!entry)
 247                 return NULL;
 248
 249         for (i = 0; i < pages; i++) {
 250                 entry->elements[i] = __dev_alloc_page(GFP_KERNEL);
 251
 252                 if (!entry->elements[i]) {
 253                         qeth_free_pool_entry(entry);
 254                         return NULL;
 255                 }
 256         }
 257
 258         return entry;
 259 }
 260
 261 static int qeth_alloc_buffer_pool(struct qeth_card *card)
 262 {
 263         unsigned int buf_elements = QETH_MAX_BUFFER_ELEMENTS(card);
 264         unsigned int i;
 265
 266         QETH_CARD_TEXT(card, 5, "alocpool");
 267         for (i = 0; i < card->qdio.init_pool.buf_count; ++i) {
 268                 struct qeth_buffer_pool_entry *entry;
 269
 270                 entry = qeth_alloc_pool_entry(buf_elements);
 271                 if (!entry) {
 272                         qeth_free_buffer_pool(card);
 273                         return -ENOMEM;
 274                 }
 275
 276                 list_add(&entry->init_list, &card->qdio.init_pool.entry_list);
 277         }
 278         return 0;
 279 }
 280
 281 int qeth_resize_buffer_pool(struct qeth_card *card, unsigned int count)
 282 {
 283         unsigned int buf_elements = QETH_MAX_BUFFER_ELEMENTS(card);
 284         struct qeth_qdio_buffer_pool *pool = &card->qdio.init_pool;
 285         struct qeth_buffer_pool_entry *entry, *tmp;
 286         int delta = count - pool->buf_count;
 287         LIST_HEAD(entries);
 288
 289         QETH_CARD_TEXT(card, 2, "realcbp");
 290
 291         /* Defer until queue is allocated: */
 292         if (!card->qdio.in_q)
 293                 goto out;
 294
 295         /* Remove entries from the pool: */
 296         while (delta < 0) {
 297                 entry = list_first_entry(&pool->entry_list,
 298                                          struct qeth_buffer_pool_entry,
 299                                          init_list);
 300                 list_del(&entry->init_list);
 301                 qeth_free_pool_entry(entry);
 302
 303                 delta++;
 304         }
 305
 306         /* Allocate additional entries: */
 307         while (delta > 0) {
 308                 entry = qeth_alloc_pool_entry(buf_elements);
 309                 if (!entry) {
 310                         list_for_each_entry_safe(entry, tmp, &entries,
 311                                                  init_list) {
 312                                 list_del(&entry->init_list);
 313                                 qeth_free_pool_entry(entry);
 314                         }
 315
 316                         return -ENOMEM;
 317                 }
 318
 319                 list_add(&entry->init_list, &entries);
 320
 321                 delta--;
 322         }
 323
 324         list_splice(&entries, &pool->entry_list);
 325
 326 out:
 327         card->qdio.in_buf_pool.buf_count = count;
 328         pool->buf_count = count;
 329         return 0;
 330 }
 331 EXPORT_SYMBOL_GPL(qeth_resize_buffer_pool);
 332
 333 static void qeth_free_qdio_queue(struct qeth_qdio_q *q)
 334 {
 335         if (!q)
 336                 return;
 337
 338         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
 339         kfree(q);
 340 }
 341
 342 static struct qeth_qdio_q *qeth_alloc_qdio_queue(void)
 343 {
 344         struct qeth_qdio_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
 345         int i;
 346
 347         if (!q)
 348                 return NULL;
 349
 350         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
 351                 kfree(q);
 352                 return NULL;
 353         }
 354
 355         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i)
 356                 q->bufs[i].buffer = q->qdio_bufs[i];
 357
 358         QETH_DBF_HEX(SETUP, 2, &q, sizeof(void *));
 359         return q;
 360 }
 361
 362 static int qeth_cq_init(struct qeth_card *card)
 363 {
 364         int rc;
 365
 366         if (card->options.cq == QETH_CQ_ENABLED) {
 367                 QETH_CARD_TEXT(card, 2, "cqinit");
 368                 qdio_reset_buffers(card->qdio.c_q->qdio_bufs,
 369                                    QDIO_MAX_BUFFERS_PER_Q);
 370                 card->qdio.c_q->next_buf_to_init = 127;
 371                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT,
 372                              card->qdio.no_in_queues - 1, 0, 127, NULL);
 373                 if (rc) {
 374                         QETH_CARD_TEXT_(card, 2, "1err%d", rc);
 375                         goto out;
 376                 }
 377         }
 378         rc = 0;
 379 out:
 380         return rc;
 381 }
 382
 383 static int qeth_alloc_cq(struct qeth_card *card)
 384 {
 385         if (card->options.cq == QETH_CQ_ENABLED) {
 386                 QETH_CARD_TEXT(card, 2, "cqon");
 387                 card->qdio.c_q = qeth_alloc_qdio_queue();
 388                 if (!card->qdio.c_q) {
 389                         dev_err(&card->gdev->dev, "Failed to create completion queue\n");
 390                         return -ENOMEM;
 391                 }
 392
 393                 card->qdio.no_in_queues = 2;
 394         } else {
 395                 QETH_CARD_TEXT(card, 2, "nocq");
 396                 card->qdio.c_q = NULL;
 397                 card->qdio.no_in_queues = 1;
 398         }
 399         QETH_CARD_TEXT_(card, 2, "iqc%d", card->qdio.no_in_queues);
 400         return 0;
 401 }
 402
 403 static void qeth_free_cq(struct qeth_card *card)
 404 {
 405         if (card->qdio.c_q) {
 406                 --card->qdio.no_in_queues;
 407                 qeth_free_qdio_queue(card->qdio.c_q);
 408                 card->qdio.c_q = NULL;
 409         }
 410 }
 411
 412 static enum iucv_tx_notify qeth_compute_cq_notification(int sbalf15,
 413                                                         int delayed)
 414 {
 415         enum iucv_tx_notify n;
 416
 417         switch (sbalf15) {
 418         case 0:
 419                 n = delayed ? TX_NOTIFY_DELAYED_OK : TX_NOTIFY_OK;
 420                 break;
 421         case 4:
 422         case 16:
 423         case 17:
 424         case 18:
 425                 n = delayed ? TX_NOTIFY_DELAYED_UNREACHABLE :
 426                         TX_NOTIFY_UNREACHABLE;
 427                 break;
 428         default:
 429                 n = delayed ? TX_NOTIFY_DELAYED_GENERALERROR :
 430                         TX_NOTIFY_GENERALERROR;
 431                 break;
 432         }
 433
 434         return n;
 435 }
 436
 437 static void qeth_qdio_handle_aob(struct qeth_card *card,
 438                                  unsigned long phys_aob_addr)
 439 {
 440         enum qeth_qdio_out_buffer_state new_state = QETH_QDIO_BUF_QAOB_OK;
 441         struct qaob *aob;
 442         struct qeth_qdio_out_buffer *buffer;
 443         enum iucv_tx_notify notification;
 444         struct qeth_qdio_out_q *queue;
 445         unsigned int i;
 446
 447         aob = (struct qaob *) phys_to_virt(phys_aob_addr);
 448         QETH_CARD_TEXT(card, 5, "haob");
 449         QETH_CARD_TEXT_(card, 5, "%lx", phys_aob_addr);
 450         buffer = (struct qeth_qdio_out_buffer *) aob->user1;
 451         QETH_CARD_TEXT_(card, 5, "%lx", aob->user1);
 452
 453         if (aob->aorc) {
 454                 QETH_CARD_TEXT_(card, 2, "aorc%02X", aob->aorc);
 455                 new_state = QETH_QDIO_BUF_QAOB_ERROR;
 456         }
 457
 458         switch (atomic_xchg(&buffer->state, new_state)) {
 459         case QETH_QDIO_BUF_PRIMED:
 460                 /* Faster than TX completion code, let it handle the async
 461                  * completion for us. It will also recycle the QAOB.
 462                  */
 463                 break;
 464         case QETH_QDIO_BUF_PENDING:
 465                 /* TX completion code is active and will handle the async
 466                  * completion for us. It will also recycle the QAOB.
 467                  */
 468                 break;
 469         case QETH_QDIO_BUF_NEED_QAOB:
 470                 /* TX completion code is already finished. */
 471                 notification = qeth_compute_cq_notification(aob->aorc, 1);
 472                 qeth_notify_skbs(buffer->q, buffer, notification);
 473
 474                 /* Free dangling allocations. The attached skbs are handled by
 475                  * qeth_tx_complete_pending_bufs(), and so is the QAOB.
 476                  */
 477                 for (i = 0;
 478                      i < aob->sb_count && i < QETH_MAX_BUFFER_ELEMENTS(card);
 479                      i++) {
 480                         void *data = phys_to_virt(aob->sba[i]);
 481
 482                         if (data && buffer->is_header[i])
 483                                 kmem_cache_free(qeth_core_header_cache, data);
 484                         buffer->is_header[i] = 0;
 485                 }
 486
 487                 queue = buffer->q;
 488                 atomic_set(&buffer->state, QETH_QDIO_BUF_EMPTY);
 489                 napi_schedule(&queue->napi);
 490                 break;
 491         default:
 492                 WARN_ON_ONCE(1);
 493         }
 494 }
 495
 496 static void qeth_setup_ccw(struct ccw1 *ccw, u8 cmd_code, u8 flags, u32 len,
 497                            void *data)
 498 {
 499         ccw->cmd_code = cmd_code;
 500         ccw->flags = flags | CCW_FLAG_SLI;
 501         ccw->count = len;
 502         ccw->cda = (__u32) __pa(data);
 503 }
 504
 505 static int __qeth_issue_next_read(struct qeth_card *card)
 506 {
 507         struct qeth_cmd_buffer *iob = card->read_cmd;
 508         struct qeth_channel *channel = iob->channel;
 509         struct ccw1 *ccw = __ccw_from_cmd(iob);
 510         int rc;
 511
 512         QETH_CARD_TEXT(card, 5, "issnxrd");
 513         if (channel->state != CH_STATE_UP)
 514                 return -EIO;
 515
 516         memset(iob->data, 0, iob->length);
 517         qeth_setup_ccw(ccw, CCW_CMD_READ, 0, iob->length, iob->data);
 518         iob->callback = qeth_issue_next_read_cb;
 519         /* keep the cmd alive after completion: */
 520         qeth_get_cmd(iob);
 521
 522         QETH_CARD_TEXT(card, 6, "noirqpnd");
 523         rc = ccw_device_start(channel->ccwdev, ccw, (addr_t) iob, 0, 0);
 524         if (!rc) {
 525                 channel->active_cmd = iob;
 526         } else {
 527                 QETH_DBF_MESSAGE(2, "error %i on device %x when starting next read ccw!\n",
 528                                  rc, CARD_DEVID(card));
 529                 qeth_unlock_channel(card, channel);
 530                 qeth_put_cmd(iob);
 531                 card->read_or_write_problem = 1;
 532                 qeth_schedule_recovery(card);
 533         }
 534         return rc;
 535 }
 536
 537 static int qeth_issue_next_read(struct qeth_card *card)
 538 {
 539         int ret;
 540
 541         spin_lock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 542         ret = __qeth_issue_next_read(card);
 543         spin_unlock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 544
 545         return ret;
 546 }
 547
 548 static void qeth_enqueue_cmd(struct qeth_card *card,
 549                              struct qeth_cmd_buffer *iob)
 550 {
 551         spin_lock_irq(&card->lock);
 552         list_add_tail(&iob->list_entry, &card->cmd_waiter_list);
 553         spin_unlock_irq(&card->lock);
 554 }
 555
 556 static void qeth_dequeue_cmd(struct qeth_card *card,
 557                              struct qeth_cmd_buffer *iob)
 558 {
 559         spin_lock_irq(&card->lock);
 560         list_del(&iob->list_entry);
 561         spin_unlock_irq(&card->lock);
 562 }
 563
 564 void qeth_notify_cmd(struct qeth_cmd_buffer *iob, int reason)
 565 {
 566         iob->rc = reason;
 567         complete(&iob->done);
 568 }
 569 EXPORT_SYMBOL_GPL(qeth_notify_cmd);
 570
 571 static void qeth_flush_local_addrs4(struct qeth_card *card)
 572 {
 573         struct qeth_local_addr *addr;
 574         struct hlist_node *tmp;
 575         unsigned int i;
 576
 577         spin_lock_irq(&card->local_addrs4_lock);
 578         hash_for_each_safe(card->local_addrs4, i, tmp, addr, hnode) {
 579                 hash_del_rcu(&addr->hnode);
 580                 kfree_rcu(addr, rcu);
 581         }
 582         spin_unlock_irq(&card->local_addrs4_lock);
 583 }
 584
 585 static void qeth_flush_local_addrs6(struct qeth_card *card)
 586 {
 587         struct qeth_local_addr *addr;
 588         struct hlist_node *tmp;
 589         unsigned int i;
 590
 591         spin_lock_irq(&card->local_addrs6_lock);
 592         hash_for_each_safe(card->local_addrs6, i, tmp, addr, hnode) {
 593                 hash_del_rcu(&addr->hnode);
 594                 kfree_rcu(addr, rcu);
 595         }
 596         spin_unlock_irq(&card->local_addrs6_lock);
 597 }
 598
 599 static void qeth_flush_local_addrs(struct qeth_card *card)
 600 {
 601         qeth_flush_local_addrs4(card);
 602         qeth_flush_local_addrs6(card);
 603 }
 604
 605 static void qeth_add_local_addrs4(struct qeth_card *card,
 606                                   struct qeth_ipacmd_local_addrs4 *cmd)
 607 {
 608         unsigned int i;
 609
 610         if (cmd->addr_length !=
 611             sizeof_field(struct qeth_ipacmd_local_addr4, addr)) {
 612                 dev_err_ratelimited(&card->gdev->dev,
 613                                     "Dropped IPv4 ADD LOCAL ADDR event with bad length %u\n",
 614                                     cmd->addr_length);
 615                 return;
 616         }
 617
 618         spin_lock(&card->local_addrs4_lock);
 619         for (i = 0; i < cmd->count; i++) {
 620                 unsigned int key = ipv4_addr_hash(cmd->addrs[i].addr);
 621                 struct qeth_local_addr *addr;
 622                 bool duplicate = false;
 623
 624                 hash_for_each_possible(card->local_addrs4, addr, hnode, key) {
 625                         if (addr->addr.s6_addr32[3] == cmd->addrs[i].addr) {
 626                                 duplicate = true;
 627                                 break;
 628                         }
 629                 }
 630
 631                 if (duplicate)
 632                         continue;
 633
 634                 addr = kmalloc(sizeof(*addr), GFP_ATOMIC);
 635                 if (!addr) {
 636                         dev_err(&card->gdev->dev,
 637                                 "Failed to allocate local addr object. Traffic to %pI4 might suffer.\n",
 638                                 &cmd->addrs[i].addr);
 639                         continue;
 640                 }
 641
 642                 ipv6_addr_set(&addr->addr, 0, 0, 0, cmd->addrs[i].addr);
 643                 hash_add_rcu(card->local_addrs4, &addr->hnode, key);
 644         }
 645         spin_unlock(&card->local_addrs4_lock);
 646 }
 647
 648 static void qeth_add_local_addrs6(struct qeth_card *card,
 649                                   struct qeth_ipacmd_local_addrs6 *cmd)
 650 {
 651         unsigned int i;
 652
 653         if (cmd->addr_length !=
 654             sizeof_field(struct qeth_ipacmd_local_addr6, addr)) {
 655                 dev_err_ratelimited(&card->gdev->dev,
 656                                     "Dropped IPv6 ADD LOCAL ADDR event with bad length %u\n",
 657                                     cmd->addr_length);
 658                 return;
 659         }
 660
 661         spin_lock(&card->local_addrs6_lock);
 662         for (i = 0; i < cmd->count; i++) {
 663                 u32 key = ipv6_addr_hash(&cmd->addrs[i].addr);
 664                 struct qeth_local_addr *addr;
 665                 bool duplicate = false;
 666
 667                 hash_for_each_possible(card->local_addrs6, addr, hnode, key) {
 668                         if (ipv6_addr_equal(&addr->addr, &cmd->addrs[i].addr)) {
 669                                 duplicate = true;
 670                                 break;
 671                         }
 672                 }
 673
 674                 if (duplicate)
 675                         continue;
 676
 677                 addr = kmalloc(sizeof(*addr), GFP_ATOMIC);
 678                 if (!addr) {
 679                         dev_err(&card->gdev->dev,
 680                                 "Failed to allocate local addr object. Traffic to %pI6c might suffer.\n",
 681                                 &cmd->addrs[i].addr);
 682                         continue;
 683                 }
 684
 685                 addr->addr = cmd->addrs[i].addr;
 686                 hash_add_rcu(card->local_addrs6, &addr->hnode, key);
 687         }
 688         spin_unlock(&card->local_addrs6_lock);
 689 }
 690
 691 static void qeth_del_local_addrs4(struct qeth_card *card,
 692                                   struct qeth_ipacmd_local_addrs4 *cmd)
 693 {
 694         unsigned int i;
 695
 696         if (cmd->addr_length !=
 697             sizeof_field(struct qeth_ipacmd_local_addr4, addr)) {
 698                 dev_err_ratelimited(&card->gdev->dev,
 699                                     "Dropped IPv4 DEL LOCAL ADDR event with bad length %u\n",
 700                                     cmd->addr_length);
 701                 return;
 702         }
 703
 704         spin_lock(&card->local_addrs4_lock);
 705         for (i = 0; i < cmd->count; i++) {
 706                 struct qeth_ipacmd_local_addr4 *addr = &cmd->addrs[i];
 707                 unsigned int key = ipv4_addr_hash(addr->addr);
 708                 struct qeth_local_addr *tmp;
 709
 710                 hash_for_each_possible(card->local_addrs4, tmp, hnode, key) {
 711                         if (tmp->addr.s6_addr32[3] == addr->addr) {
 712                                 hash_del_rcu(&tmp->hnode);
 713                                 kfree_rcu(tmp, rcu);
 714                                 break;
 715                         }
 716                 }
 717         }
 718         spin_unlock(&card->local_addrs4_lock);
 719 }
 720
 721 static void qeth_del_local_addrs6(struct qeth_card *card,
 722                                   struct qeth_ipacmd_local_addrs6 *cmd)
 723 {
 724         unsigned int i;
 725
 726         if (cmd->addr_length !=
 727             sizeof_field(struct qeth_ipacmd_local_addr6, addr)) {
 728                 dev_err_ratelimited(&card->gdev->dev,
 729                                     "Dropped IPv6 DEL LOCAL ADDR event with bad length %u\n",
 730                                     cmd->addr_length);
 731                 return;
 732         }
 733
 734         spin_lock(&card->local_addrs6_lock);
 735         for (i = 0; i < cmd->count; i++) {
 736                 struct qeth_ipacmd_local_addr6 *addr = &cmd->addrs[i];
 737                 u32 key = ipv6_addr_hash(&addr->addr);
 738                 struct qeth_local_addr *tmp;
 739
 740                 hash_for_each_possible(card->local_addrs6, tmp, hnode, key) {
 741                         if (ipv6_addr_equal(&tmp->addr, &addr->addr)) {
 742                                 hash_del_rcu(&tmp->hnode);
 743                                 kfree_rcu(tmp, rcu);
 744                                 break;
 745                         }
 746                 }
 747         }
 748         spin_unlock(&card->local_addrs6_lock);
 749 }
 750
 751 static bool qeth_next_hop_is_local_v4(struct qeth_card *card,
 752                                       struct sk_buff *skb)
 753 {
 754         struct qeth_local_addr *tmp;
 755         bool is_local = false;
 756         unsigned int key;
 757         __be32 next_hop;
 758
 759         if (hash_empty(card->local_addrs4))
 760                 return false;
 761
 762         rcu_read_lock();
 763         next_hop = qeth_next_hop_v4_rcu(skb,
 764                                         qeth_dst_check_rcu(skb, htons(ETH_P_IP)));
 765         key = ipv4_addr_hash(next_hop);
 766
 767         hash_for_each_possible_rcu(card->local_addrs4, tmp, hnode, key) {
 768                 if (tmp->addr.s6_addr32[3] == next_hop) {
 769                         is_local = true;
 770                         break;
 771                 }
 772         }
 773         rcu_read_unlock();
 774
 775         return is_local;
 776 }
 777
 778 static bool qeth_next_hop_is_local_v6(struct qeth_card *card,
 779                                       struct sk_buff *skb)
 780 {
 781         struct qeth_local_addr *tmp;
 782         struct in6_addr *next_hop;
 783         bool is_local = false;
 784         u32 key;
 785
 786         if (hash_empty(card->local_addrs6))
 787                 return false;
 788
 789         rcu_read_lock();
 790         next_hop = qeth_next_hop_v6_rcu(skb,
 791                                         qeth_dst_check_rcu(skb, htons(ETH_P_IPV6)));
 792         key = ipv6_addr_hash(next_hop);
 793
 794         hash_for_each_possible_rcu(card->local_addrs6, tmp, hnode, key) {
 795                 if (ipv6_addr_equal(&tmp->addr, next_hop)) {
 796                         is_local = true;
 797                         break;
 798                 }
 799         }
 800         rcu_read_unlock();
 801
 802         return is_local;
 803 }
 804
 805 static int qeth_debugfs_local_addr_show(struct seq_file *m, void *v)
 806 {
 807         struct qeth_card *card = m->private;
 808         struct qeth_local_addr *tmp;
 809         unsigned int i;
 810
 811         rcu_read_lock();
 812         hash_for_each_rcu(card->local_addrs4, i, tmp, hnode)
 813                 seq_printf(m, "%pI4\n", &tmp->addr.s6_addr32[3]);
 814         hash_for_each_rcu(card->local_addrs6, i, tmp, hnode)
 815                 seq_printf(m, "%pI6c\n", &tmp->addr);
 816         rcu_read_unlock();
 817
 818         return 0;
 819 }
 820
 821 DEFINE_SHOW_ATTRIBUTE(qeth_debugfs_local_addr);
 822
 823 static void qeth_issue_ipa_msg(struct qeth_ipa_cmd *cmd, int rc,
 824                 struct qeth_card *card)
 825 {
 826         const char *ipa_name;
 827         int com = cmd->hdr.command;
 828
 829         ipa_name = qeth_get_ipa_cmd_name(com);
 830
 831         if (rc)
 832                 QETH_DBF_MESSAGE(2, "IPA: %s(%#x) for device %x returned %#x \"%s\"\n",
 833                                  ipa_name, com, CARD_DEVID(card), rc,
 834                                  qeth_get_ipa_msg(rc));
 835         else
 836                 QETH_DBF_MESSAGE(5, "IPA: %s(%#x) for device %x succeeded\n",
 837                                  ipa_name, com, CARD_DEVID(card));
 838 }
 839
 840 static struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card,
 841                                                 struct qeth_ipa_cmd *cmd)
 842 {
 843         QETH_CARD_TEXT(card, 5, "chkipad");
 844
 845         if (IS_IPA_REPLY(cmd)) {
 846                 if (cmd->hdr.command != IPA_CMD_SETCCID &&
 847                     cmd->hdr.command != IPA_CMD_DELCCID &&
 848                     cmd->hdr.command != IPA_CMD_MODCCID &&
 849                     cmd->hdr.command != IPA_CMD_SET_DIAG_ASS)
 850                         qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
 851                 return cmd;
 852         }
 853
 854         /* handle unsolicited event: */
 855         switch (cmd->hdr.command) {
 856         case IPA_CMD_STOPLAN:
 857                 if (cmd->hdr.return_code == IPA_RC_VEPA_TO_VEB_TRANSITION) {
 858                         dev_err(&card->gdev->dev,
 859                                 "Interface %s is down because the adjacent port is no longer in reflective relay mode\n",
 860                                 netdev_name(card->dev));
 861                         schedule_work(&card->close_dev_work);
 862                 } else {
 863                         dev_warn(&card->gdev->dev,
 864                                  "The link for interface %s on CHPID 0x%X failed\n",
 865                                  netdev_name(card->dev), card->info.chpid);
 866                         qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
 867                         netif_carrier_off(card->dev);
 868                 }
 869                 return NULL;
 870         case IPA_CMD_STARTLAN:
 871                 dev_info(&card->gdev->dev,
 872                          "The link for %s on CHPID 0x%X has been restored\n",
 873                          netdev_name(card->dev), card->info.chpid);
 874                 if (card->info.hwtrap)
 875                         card->info.hwtrap = 2;
 876                 qeth_schedule_recovery(card);
 877                 return NULL;
 878         case IPA_CMD_SETBRIDGEPORT_IQD:
 879         case IPA_CMD_SETBRIDGEPORT_OSA:
 880         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
 881                 if (card->discipline->control_event_handler(card, cmd))
 882                         return cmd;
 883                 return NULL;
 884         case IPA_CMD_MODCCID:
 885                 return cmd;
 886         case IPA_CMD_REGISTER_LOCAL_ADDR:
 887                 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
 888                         qeth_add_local_addrs4(card, &cmd->data.local_addrs4);
 889                 else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
 890                         qeth_add_local_addrs6(card, &cmd->data.local_addrs6);
 891
 892                 QETH_CARD_TEXT(card, 3, "irla");
 893                 return NULL;
 894         case IPA_CMD_UNREGISTER_LOCAL_ADDR:
 895                 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
 896                         qeth_del_local_addrs4(card, &cmd->data.local_addrs4);
 897                 else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
 898                         qeth_del_local_addrs6(card, &cmd->data.local_addrs6);
 899
 900                 QETH_CARD_TEXT(card, 3, "urla");
 901                 return NULL;
 902         default:
 903                 QETH_DBF_MESSAGE(2, "Received data is IPA but not a reply!\n");
 904                 return cmd;
 905         }
 906 }
 907
 908 static void qeth_clear_ipacmd_list(struct qeth_card *card)
 909 {
 910         struct qeth_cmd_buffer *iob;
 911         unsigned long flags;
 912
 913         QETH_CARD_TEXT(card, 4, "clipalst");
 914
 915         spin_lock_irqsave(&card->lock, flags);
 916         list_for_each_entry(iob, &card->cmd_waiter_list, list_entry)
 917                 qeth_notify_cmd(iob, -ECANCELED);
 918         spin_unlock_irqrestore(&card->lock, flags);
 919 }
 920
 921 static int qeth_check_idx_response(struct qeth_card *card,
 922         unsigned char *buffer)
 923 {
 924         QETH_DBF_HEX(CTRL, 2, buffer, QETH_DBF_CTRL_LEN);
 925         if ((buffer[2] & QETH_IDX_TERMINATE_MASK) == QETH_IDX_TERMINATE) {
 926                 QETH_DBF_MESSAGE(2, "received an IDX TERMINATE with cause code %#04x\n",
 927                                  buffer[4]);
 928                 QETH_CARD_TEXT(card, 2, "ckidxres");
 929                 QETH_CARD_TEXT(card, 2, " idxterm");
 930                 QETH_CARD_TEXT_(card, 2, "rc%x", buffer[4]);
 931                 if (buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT ||
 932                     buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT_VM) {
 933                         dev_err(&card->gdev->dev,
 934                                 "The device does not support the configured transport mode\n");
 935                         return -EPROTONOSUPPORT;
 936                 }
 937                 return -EIO;
 938         }
 939         return 0;
 940 }
 941
 942 void qeth_put_cmd(struct qeth_cmd_buffer *iob)
 943 {
 944         if (refcount_dec_and_test(&iob->ref_count)) {
 945                 kfree(iob->data);
 946                 kfree(iob);
 947         }
 948 }
 949 EXPORT_SYMBOL_GPL(qeth_put_cmd);
 950
 951 static void qeth_release_buffer_cb(struct qeth_card *card,
 952                                    struct qeth_cmd_buffer *iob,
 953                                    unsigned int data_length)
 954 {
 955         qeth_put_cmd(iob);
 956 }
 957
 958 static void qeth_cancel_cmd(struct qeth_cmd_buffer *iob, int rc)
 959 {
 960         qeth_notify_cmd(iob, rc);
 961         qeth_put_cmd(iob);
 962 }
 963
 964 struct qeth_cmd_buffer *qeth_alloc_cmd(struct qeth_channel *channel,
 965                                        unsigned int length, unsigned int ccws,
 966                                        long timeout)
 967 {
 968         struct qeth_cmd_buffer *iob;
 969
 970         if (length > QETH_BUFSIZE)
 971                 return NULL;
 972
 973         iob = kzalloc(sizeof(*iob), GFP_KERNEL);
 974         if (!iob)
 975                 return NULL;
 976
 977         iob->data = kzalloc(ALIGN(length, 8) + ccws * sizeof(struct ccw1),
 978                             GFP_KERNEL | GFP_DMA);
 979         if (!iob->data) {
 980                 kfree(iob);
 981                 return NULL;
 982         }
 983
 984         init_completion(&iob->done);
 985         spin_lock_init(&iob->lock);
 986         refcount_set(&iob->ref_count, 1);
 987         iob->channel = channel;
 988         iob->timeout = timeout;
 989         iob->length = length;
 990         return iob;
 991 }
 992 EXPORT_SYMBOL_GPL(qeth_alloc_cmd);
 993
 994 static void qeth_issue_next_read_cb(struct qeth_card *card,
 995                                     struct qeth_cmd_buffer *iob,
 996                                     unsigned int data_length)
 997 {
 998         struct qeth_cmd_buffer *request = NULL;
 999         struct qeth_ipa_cmd *cmd = NULL;
1000         struct qeth_reply *reply = NULL;
1001         struct qeth_cmd_buffer *tmp;
1002         unsigned long flags;
1003         int rc = 0;
1004
1005         QETH_CARD_TEXT(card, 4, "sndctlcb");
1006         rc = qeth_check_idx_response(card, iob->data);
1007         switch (rc) {
1008         case 0:
1009                 break;
1010         case -EIO:
1011                 qeth_schedule_recovery(card);
1012                 fallthrough;
1013         default:
1014                 qeth_clear_ipacmd_list(card);
1015                 goto err_idx;
1016         }
1017
1018         cmd = __ipa_reply(iob);
1019         if (cmd) {
1020                 cmd = qeth_check_ipa_data(card, cmd);
1021                 if (!cmd)
1022                         goto out;
1023                 if (IS_OSN(card) && card->osn_info.assist_cb &&
1024                     cmd->hdr.command != IPA_CMD_STARTLAN) {
1025                         card->osn_info.assist_cb(card->dev, cmd);
1026                         goto out;
1027                 }
1028         }
1029
1030         /* match against pending cmd requests */
1031         spin_lock_irqsave(&card->lock, flags);
1032         list_for_each_entry(tmp, &card->cmd_waiter_list, list_entry) {
1033                 if (tmp->match && tmp->match(tmp, iob)) {
1034                         request = tmp;
1035                         /* take the object outside the lock */
1036                         qeth_get_cmd(request);
1037                         break;
1038                 }
1039         }
1040         spin_unlock_irqrestore(&card->lock, flags);
1041
1042         if (!request)
1043                 goto out;
1044
1045         reply = &request->reply;
1046         if (!reply->callback) {
1047                 rc = 0;
1048                 goto no_callback;
1049         }
1050
1051         spin_lock_irqsave(&request->lock, flags);
1052         if (request->rc)
1053                 /* Bail out when the requestor has already left: */
1054                 rc = request->rc;
1055         else
1056                 rc = reply->callback(card, reply, cmd ? (unsigned long)cmd :
1057                                                         (unsigned long)iob);
1058         spin_unlock_irqrestore(&request->lock, flags);
1059
1060 no_callback:
1061         if (rc <= 0)
1062                 qeth_notify_cmd(request, rc);
1063         qeth_put_cmd(request);
1064 out:
1065         memcpy(&card->seqno.pdu_hdr_ack,
1066                 QETH_PDU_HEADER_SEQ_NO(iob->data),
1067                 QETH_SEQ_NO_LENGTH);
1068         __qeth_issue_next_read(card);
1069 err_idx:
1070         qeth_put_cmd(iob);
1071 }
1072
1073 static int qeth_set_thread_start_bit(struct qeth_card *card,
1074                 unsigned long thread)
1075 {
1076         unsigned long flags;
1077         int rc = 0;
1078
1079         spin_lock_irqsave(&card->thread_mask_lock, flags);
1080         if (!(card->thread_allowed_mask & thread))
1081                 rc = -EPERM;
1082         else if (card->thread_start_mask & thread)
1083                 rc = -EBUSY;
1084         else
1085                 card->thread_start_mask |= thread;
1086         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1087
1088         return rc;
1089 }
1090
1091 static void qeth_clear_thread_start_bit(struct qeth_card *card,
1092                                         unsigned long thread)
1093 {
1094         unsigned long flags;
1095
1096         spin_lock_irqsave(&card->thread_mask_lock, flags);
1097         card->thread_start_mask &= ~thread;
1098         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1099         wake_up(&card->wait_q);
1100 }
1101
1102 static void qeth_clear_thread_running_bit(struct qeth_card *card,
1103                                           unsigned long thread)
1104 {
1105         unsigned long flags;
1106
1107         spin_lock_irqsave(&card->thread_mask_lock, flags);
1108         card->thread_running_mask &= ~thread;
1109         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1110         wake_up_all(&card->wait_q);
1111 }
1112
1113 static int __qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
1114 {
1115         unsigned long flags;
1116         int rc = 0;
1117
1118         spin_lock_irqsave(&card->thread_mask_lock, flags);
1119         if (card->thread_start_mask & thread) {
1120                 if ((card->thread_allowed_mask & thread) &&
1121                     !(card->thread_running_mask & thread)) {
1122                         rc = 1;
1123                         card->thread_start_mask &= ~thread;
1124                         card->thread_running_mask |= thread;
1125                 } else
1126                         rc = -EPERM;
1127         }
1128         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1129         return rc;
1130 }
1131
1132 static int qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
1133 {
1134         int rc = 0;
1135
1136         wait_event(card->wait_q,
1137                    (rc = __qeth_do_run_thread(card, thread)) >= 0);
1138         return rc;
1139 }
1140
1141 int qeth_schedule_recovery(struct qeth_card *card)
1142 {
1143         int rc;
1144
1145         QETH_CARD_TEXT(card, 2, "startrec");
1146
1147         rc = qeth_set_thread_start_bit(card, QETH_RECOVER_THREAD);
1148         if (!rc)
1149                 schedule_work(&card->kernel_thread_starter);
1150
1151         return rc;
1152 }
1153
1154 static int qeth_get_problem(struct qeth_card *card, struct ccw_device *cdev,
1155                             struct irb *irb)
1156 {
1157         int dstat, cstat;
1158         char *sense;
1159
1160         sense = (char *) irb->ecw;
1161         cstat = irb->scsw.cmd.cstat;
1162         dstat = irb->scsw.cmd.dstat;
1163
1164         if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK |
1165                      SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK |
1166                      SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) {
1167                 QETH_CARD_TEXT(card, 2, "CGENCHK");
1168                 dev_warn(&cdev->dev, "The qeth device driver "
1169                         "failed to recover an error on the device\n");
1170                 QETH_DBF_MESSAGE(2, "check on channel %x with dstat=%#x, cstat=%#x\n",
1171                                  CCW_DEVID(cdev), dstat, cstat);
1172                 print_hex_dump(KERN_WARNING, "qeth: irb ", DUMP_PREFIX_OFFSET,
1173                                 16, 1, irb, 64, 1);
1174                 return -EIO;
1175         }
1176
1177         if (dstat & DEV_STAT_UNIT_CHECK) {
1178                 if (sense[SENSE_RESETTING_EVENT_BYTE] &
1179                     SENSE_RESETTING_EVENT_FLAG) {
1180                         QETH_CARD_TEXT(card, 2, "REVIND");
1181                         return -EIO;
1182                 }
1183                 if (sense[SENSE_COMMAND_REJECT_BYTE] &
1184                     SENSE_COMMAND_REJECT_FLAG) {
1185                         QETH_CARD_TEXT(card, 2, "CMDREJi");
1186                         return -EIO;
1187                 }
1188                 if ((sense[2] == 0xaf) && (sense[3] == 0xfe)) {
1189                         QETH_CARD_TEXT(card, 2, "AFFE");
1190                         return -EIO;
1191                 }
1192                 if ((!sense[0]) && (!sense[1]) && (!sense[2]) && (!sense[3])) {
1193                         QETH_CARD_TEXT(card, 2, "ZEROSEN");
1194                         return 0;
1195                 }
1196                 QETH_CARD_TEXT(card, 2, "DGENCHK");
1197                 return -EIO;
1198         }
1199         return 0;
1200 }
1201
1202 static int qeth_check_irb_error(struct qeth_card *card, struct ccw_device *cdev,
1203                                 struct irb *irb)
1204 {
1205         if (!IS_ERR(irb))
1206                 return 0;
1207
1208         switch (PTR_ERR(irb)) {
1209         case -EIO:
1210                 QETH_DBF_MESSAGE(2, "i/o-error on channel %x\n",
1211                                  CCW_DEVID(cdev));
1212                 QETH_CARD_TEXT(card, 2, "ckirberr");
1213                 QETH_CARD_TEXT_(card, 2, "  rc%d", -EIO);
1214                 return -EIO;
1215         case -ETIMEDOUT:
1216                 dev_warn(&cdev->dev, "A hardware operation timed out"
1217                         " on the device\n");
1218                 QETH_CARD_TEXT(card, 2, "ckirberr");
1219                 QETH_CARD_TEXT_(card, 2, "  rc%d", -ETIMEDOUT);
1220                 return -ETIMEDOUT;
1221         default:
1222                 QETH_DBF_MESSAGE(2, "unknown error %ld on channel %x\n",
1223                                  PTR_ERR(irb), CCW_DEVID(cdev));
1224                 QETH_CARD_TEXT(card, 2, "ckirberr");
1225                 QETH_CARD_TEXT(card, 2, "  rc???");
1226                 return PTR_ERR(irb);
1227         }
1228 }
1229
1230 static void qeth_irq(struct ccw_device *cdev, unsigned long intparm,
1231                 struct irb *irb)
1232 {
1233         int rc;
1234         int cstat, dstat;
1235         struct qeth_cmd_buffer *iob = NULL;
1236         struct ccwgroup_device *gdev;
1237         struct qeth_channel *channel;
1238         struct qeth_card *card;
1239
1240         /* while we hold the ccwdev lock, this stays valid: */
1241         gdev = dev_get_drvdata(&cdev->dev);
1242         card = dev_get_drvdata(&gdev->dev);
1243
1244         QETH_CARD_TEXT(card, 5, "irq");
1245
1246         if (card->read.ccwdev == cdev) {
1247                 channel = &card->read;
1248                 QETH_CARD_TEXT(card, 5, "read");
1249         } else if (card->write.ccwdev == cdev) {
1250                 channel = &card->write;
1251                 QETH_CARD_TEXT(card, 5, "write");
1252         } else {
1253                 channel = &card->data;
1254                 QETH_CARD_TEXT(card, 5, "data");
1255         }
1256
1257         if (intparm == 0) {
1258                 QETH_CARD_TEXT(card, 5, "irqunsol");
1259         } else if ((addr_t)intparm != (addr_t)channel->active_cmd) {
1260                 QETH_CARD_TEXT(card, 5, "irqunexp");
1261
1262                 dev_err(&cdev->dev,
1263                         "Received IRQ with intparm %lx, expected %px\n",
1264                         intparm, channel->active_cmd);
1265                 if (channel->active_cmd)
1266                         qeth_cancel_cmd(channel->active_cmd, -EIO);
1267         } else {
1268                 iob = (struct qeth_cmd_buffer *) (addr_t)intparm;
1269         }
1270
1271         channel->active_cmd = NULL;
1272         qeth_unlock_channel(card, channel);
1273
1274         rc = qeth_check_irb_error(card, cdev, irb);
1275         if (rc) {
1276                 /* IO was terminated, free its resources. */
1277                 if (iob)
1278                         qeth_cancel_cmd(iob, rc);
1279                 return;
1280         }
1281
1282         if (irb->scsw.cmd.fctl & SCSW_FCTL_CLEAR_FUNC) {
1283                 channel->state = CH_STATE_STOPPED;
1284                 wake_up(&card->wait_q);
1285         }
1286
1287         if (irb->scsw.cmd.fctl & SCSW_FCTL_HALT_FUNC) {
1288                 channel->state = CH_STATE_HALTED;
1289                 wake_up(&card->wait_q);
1290         }
1291
1292         if (iob && (irb->scsw.cmd.fctl & (SCSW_FCTL_CLEAR_FUNC |
1293                                           SCSW_FCTL_HALT_FUNC))) {
1294                 qeth_cancel_cmd(iob, -ECANCELED);
1295                 iob = NULL;
1296         }
1297
1298         cstat = irb->scsw.cmd.cstat;
1299         dstat = irb->scsw.cmd.dstat;
1300
1301         if ((dstat & DEV_STAT_UNIT_EXCEP) ||
1302             (dstat & DEV_STAT_UNIT_CHECK) ||
1303             (cstat)) {
1304                 if (irb->esw.esw0.erw.cons) {
1305                         dev_warn(&channel->ccwdev->dev,
1306                                 "The qeth device driver failed to recover "
1307                                 "an error on the device\n");
1308                         QETH_DBF_MESSAGE(2, "sense data available on channel %x: cstat %#X dstat %#X\n",
1309                                          CCW_DEVID(channel->ccwdev), cstat,
1310                                          dstat);
1311                         print_hex_dump(KERN_WARNING, "qeth: irb ",
1312                                 DUMP_PREFIX_OFFSET, 16, 1, irb, 32, 1);
1313                         print_hex_dump(KERN_WARNING, "qeth: sense data ",
1314                                 DUMP_PREFIX_OFFSET, 16, 1, irb->ecw, 32, 1);
1315                 }
1316
1317                 rc = qeth_get_problem(card, cdev, irb);
1318                 if (rc) {
1319                         card->read_or_write_problem = 1;
1320                         if (iob)
1321                                 qeth_cancel_cmd(iob, rc);
1322                         qeth_clear_ipacmd_list(card);
1323                         qeth_schedule_recovery(card);
1324                         return;
1325                 }
1326         }
1327
1328         if (iob) {
1329                 /* sanity check: */
1330                 if (irb->scsw.cmd.count > iob->length) {
1331                         qeth_cancel_cmd(iob, -EIO);
1332                         return;
1333                 }
1334                 if (iob->callback)
1335                         iob->callback(card, iob,
1336                                       iob->length - irb->scsw.cmd.count);
1337         }
1338 }
1339
1340 static void qeth_notify_skbs(struct qeth_qdio_out_q *q,
1341                 struct qeth_qdio_out_buffer *buf,
1342                 enum iucv_tx_notify notification)
1343 {
1344         struct sk_buff *skb;
1345
1346         skb_queue_walk(&buf->skb_list, skb) {
1347                 struct sock *sk = skb->sk;
1348
1349                 QETH_CARD_TEXT_(q->card, 5, "skbn%d", notification);
1350                 QETH_CARD_TEXT_(q->card, 5, "%lx", (long) skb);
1351                 if (sk && sk->sk_family == PF_IUCV)
1352                         iucv_sk(sk)->sk_txnotify(sk, notification);
1353         }
1354 }
1355
1356 static void qeth_tx_complete_buf(struct qeth_qdio_out_buffer *buf, bool error,
1357                                  int budget)
1358 {
1359         struct qeth_qdio_out_q *queue = buf->q;
1360         struct sk_buff *skb;
1361
1362         /* Empty buffer? */
1363         if (buf->next_element_to_fill == 0)
1364                 return;
1365
1366         QETH_TXQ_STAT_INC(queue, bufs);
1367         QETH_TXQ_STAT_ADD(queue, buf_elements, buf->next_element_to_fill);
1368         if (error) {
1369                 QETH_TXQ_STAT_ADD(queue, tx_errors, buf->frames);
1370         } else {
1371                 QETH_TXQ_STAT_ADD(queue, tx_packets, buf->frames);
1372                 QETH_TXQ_STAT_ADD(queue, tx_bytes, buf->bytes);
1373         }
1374
1375         while ((skb = __skb_dequeue(&buf->skb_list)) != NULL) {
1376                 unsigned int bytes = qdisc_pkt_len(skb);
1377                 bool is_tso = skb_is_gso(skb);
1378                 unsigned int packets;
1379
1380                 packets = is_tso ? skb_shinfo(skb)->gso_segs : 1;
1381                 if (!error) {
1382                         if (skb->ip_summed == CHECKSUM_PARTIAL)
1383                                 QETH_TXQ_STAT_ADD(queue, skbs_csum, packets);
1384                         if (skb_is_nonlinear(skb))
1385                                 QETH_TXQ_STAT_INC(queue, skbs_sg);
1386                         if (is_tso) {
1387                                 QETH_TXQ_STAT_INC(queue, skbs_tso);
1388                                 QETH_TXQ_STAT_ADD(queue, tso_bytes, bytes);
1389                         }
1390                 }
1391
1392                 napi_consume_skb(skb, budget);
1393         }
1394 }
1395
1396 static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
1397                                      struct qeth_qdio_out_buffer *buf,
1398                                      bool error, int budget)
1399 {
1400         int i;
1401
1402         /* is PCI flag set on buffer? */
1403         if (buf->buffer->element[0].sflags & SBAL_SFLAGS0_PCI_REQ)
1404                 atomic_dec(&queue->set_pci_flags_count);
1405
1406         qeth_tx_complete_buf(buf, error, budget);
1407
1408         for (i = 0; i < queue->max_elements; ++i) {
1409                 void *data = phys_to_virt(buf->buffer->element[i].addr);
1410
1411                 if (data && buf->is_header[i])
1412                         kmem_cache_free(qeth_core_header_cache, data);
1413                 buf->is_header[i] = 0;
1414         }
1415
1416         qeth_scrub_qdio_buffer(buf->buffer, queue->max_elements);
1417         buf->next_element_to_fill = 0;
1418         buf->frames = 0;
1419         buf->bytes = 0;
1420         atomic_set(&buf->state, QETH_QDIO_BUF_EMPTY);
1421 }
1422
1423 static void qeth_free_out_buf(struct qeth_qdio_out_buffer *buf)
1424 {
1425         if (buf->aob)
1426                 qdio_release_aob(buf->aob);
1427         kmem_cache_free(qeth_qdio_outbuf_cache, buf);
1428 }
1429
1430 static void qeth_tx_complete_pending_bufs(struct qeth_card *card,
1431                                           struct qeth_qdio_out_q *queue,
1432                                           bool drain, int budget)
1433 {
1434         struct qeth_qdio_out_buffer *buf, *tmp;
1435
1436         list_for_each_entry_safe(buf, tmp, &queue->pending_bufs, list_entry) {
1437                 if (drain || atomic_read(&buf->state) == QETH_QDIO_BUF_EMPTY) {
1438                         QETH_CARD_TEXT(card, 5, "fp");
1439                         QETH_CARD_TEXT_(card, 5, "%lx", (long) buf);
1440
1441                         if (drain)
1442                                 qeth_notify_skbs(queue, buf,
1443                                                  TX_NOTIFY_GENERALERROR);
1444                         qeth_tx_complete_buf(buf, drain, budget);
1445
1446                         list_del(&buf->list_entry);
1447                         qeth_free_out_buf(buf);
1448                 }
1449         }
1450 }
1451
1452 static void qeth_drain_output_queue(struct qeth_qdio_out_q *q, bool free)
1453 {
1454         int j;
1455
1456         qeth_tx_complete_pending_bufs(q->card, q, true, 0);
1457
1458         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
1459                 if (!q->bufs[j])
1460                         continue;
1461
1462                 qeth_clear_output_buffer(q, q->bufs[j], true, 0);
1463                 if (free) {
1464                         qeth_free_out_buf(q->bufs[j]);
1465                         q->bufs[j] = NULL;
1466                 }
1467         }
1468 }
1469
1470 static void qeth_drain_output_queues(struct qeth_card *card)
1471 {
1472         int i;
1473
1474         QETH_CARD_TEXT(card, 2, "clearqdbf");
1475         /* clear outbound buffers to free skbs */
1476         for (i = 0; i < card->qdio.no_out_queues; ++i) {
1477                 if (card->qdio.out_qs[i])
1478                         qeth_drain_output_queue(card->qdio.out_qs[i], false);
1479         }
1480 }
1481
1482 static void qeth_osa_set_output_queues(struct qeth_card *card, bool single)
1483 {
1484         unsigned int max = single ? 1 : card->dev->num_tx_queues;
1485
1486         if (card->qdio.no_out_queues == max)
1487                 return;
1488
1489         if (atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED)
1490                 qeth_free_qdio_queues(card);
1491
1492         if (max == 1 && card->qdio.do_prio_queueing != QETH_PRIOQ_DEFAULT)
1493                 dev_info(&card->gdev->dev, "Priority Queueing not supported\n");
1494
1495         card->qdio.no_out_queues = max;
1496 }
1497
1498 static int qeth_update_from_chp_desc(struct qeth_card *card)
1499 {
1500         struct ccw_device *ccwdev;
1501         struct channel_path_desc_fmt0 *chp_dsc;
1502
1503         QETH_CARD_TEXT(card, 2, "chp_desc");
1504
1505         ccwdev = card->data.ccwdev;
1506         chp_dsc = ccw_device_get_chp_desc(ccwdev, 0);
1507         if (!chp_dsc)
1508                 return -ENOMEM;
1509
1510         card->info.func_level = 0x4100 + chp_dsc->desc;
1511
1512         if (IS_OSD(card) || IS_OSX(card))
1513                 /* CHPP field bit 6 == 1 -> single queue */
1514                 qeth_osa_set_output_queues(card, chp_dsc->chpp & 0x02);
1515
1516         kfree(chp_dsc);
1517         QETH_CARD_TEXT_(card, 2, "nr:%x", card->qdio.no_out_queues);
1518         QETH_CARD_TEXT_(card, 2, "lvl:%02x", card->info.func_level);
1519         return 0;
1520 }
1521
1522 static void qeth_init_qdio_info(struct qeth_card *card)
1523 {
1524         QETH_CARD_TEXT(card, 4, "intqdinf");
1525         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
1526         card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT;
1527         card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
1528
1529         /* inbound */
1530         card->qdio.no_in_queues = 1;
1531         card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
1532         if (IS_IQD(card))
1533                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_HSDEFAULT;
1534         else
1535                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_DEFAULT;
1536         card->qdio.in_buf_pool.buf_count = card->qdio.init_pool.buf_count;
1537         INIT_LIST_HEAD(&card->qdio.in_buf_pool.entry_list);
1538         INIT_LIST_HEAD(&card->qdio.init_pool.entry_list);
1539 }
1540
1541 static void qeth_set_initial_options(struct qeth_card *card)
1542 {
1543         card->options.route4.type = NO_ROUTER;
1544         card->options.route6.type = NO_ROUTER;
1545         card->options.isolation = ISOLATION_MODE_NONE;
1546         card->options.cq = QETH_CQ_DISABLED;
1547         card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
1548 }
1549
1550 static int qeth_do_start_thread(struct qeth_card *card, unsigned long thread)
1551 {
1552         unsigned long flags;
1553         int rc = 0;
1554
1555         spin_lock_irqsave(&card->thread_mask_lock, flags);
1556         QETH_CARD_TEXT_(card, 4, "  %02x%02x%02x",
1557                         (u8) card->thread_start_mask,
1558                         (u8) card->thread_allowed_mask,
1559                         (u8) card->thread_running_mask);
1560         rc = (card->thread_start_mask & thread);
1561         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1562         return rc;
1563 }
1564
1565 static int qeth_do_reset(void *data);
1566 static void qeth_start_kernel_thread(struct work_struct *work)
1567 {
1568         struct task_struct *ts;
1569         struct qeth_card *card = container_of(work, struct qeth_card,
1570                                         kernel_thread_starter);
1571         QETH_CARD_TEXT(card, 2, "strthrd");
1572
1573         if (card->read.state != CH_STATE_UP &&
1574             card->write.state != CH_STATE_UP)
1575                 return;
1576         if (qeth_do_start_thread(card, QETH_RECOVER_THREAD)) {
1577                 ts = kthread_run(qeth_do_reset, card, "qeth_recover");
1578                 if (IS_ERR(ts)) {
1579                         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1580                         qeth_clear_thread_running_bit(card,
1581                                 QETH_RECOVER_THREAD);
1582                 }
1583         }
1584 }
1585
1586 static void qeth_buffer_reclaim_work(struct work_struct *);
1587 static void qeth_setup_card(struct qeth_card *card)
1588 {
1589         QETH_CARD_TEXT(card, 2, "setupcrd");
1590
1591         card->info.type = CARD_RDEV(card)->id.driver_info;
1592         card->state = CARD_STATE_DOWN;
1593         spin_lock_init(&card->lock);
1594         spin_lock_init(&card->thread_mask_lock);
1595         mutex_init(&card->conf_mutex);
1596         mutex_init(&card->discipline_mutex);
1597         INIT_WORK(&card->kernel_thread_starter, qeth_start_kernel_thread);
1598         INIT_LIST_HEAD(&card->cmd_waiter_list);
1599         init_waitqueue_head(&card->wait_q);
1600         qeth_set_initial_options(card);
1601         /* IP address takeover */
1602         INIT_LIST_HEAD(&card->ipato.entries);
1603         qeth_init_qdio_info(card);
1604         INIT_DELAYED_WORK(&card->buffer_reclaim_work, qeth_buffer_reclaim_work);
1605         INIT_WORK(&card->close_dev_work, qeth_close_dev_handler);
1606         hash_init(card->rx_mode_addrs);
1607         hash_init(card->local_addrs4);
1608         hash_init(card->local_addrs6);
1609         spin_lock_init(&card->local_addrs4_lock);
1610         spin_lock_init(&card->local_addrs6_lock);
1611 }
1612
1613 static void qeth_core_sl_print(struct seq_file *m, struct service_level *slr)
1614 {
1615         struct qeth_card *card = container_of(slr, struct qeth_card,
1616                                         qeth_service_level);
1617         if (card->info.mcl_level[0])
1618                 seq_printf(m, "qeth: %s firmware level %s\n",
1619                         CARD_BUS_ID(card), card->info.mcl_level);
1620 }
1621
1622 static struct qeth_card *qeth_alloc_card(struct ccwgroup_device *gdev)
1623 {
1624         struct qeth_card *card;
1625
1626         QETH_DBF_TEXT(SETUP, 2, "alloccrd");
1627         card = kzalloc(sizeof(*card), GFP_KERNEL);
1628         if (!card)
1629                 goto out;
1630         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1631
1632         card->gdev = gdev;
1633         dev_set_drvdata(&gdev->dev, card);
1634         CARD_RDEV(card) = gdev->cdev[0];
1635         CARD_WDEV(card) = gdev->cdev[1];
1636         CARD_DDEV(card) = gdev->cdev[2];
1637
1638         card->event_wq = alloc_ordered_workqueue("%s_event", 0,
1639                                                  dev_name(&gdev->dev));
1640         if (!card->event_wq)
1641                 goto out_wq;
1642
1643         card->read_cmd = qeth_alloc_cmd(&card->read, QETH_BUFSIZE, 1, 0);
1644         if (!card->read_cmd)
1645                 goto out_read_cmd;
1646
1647         card->debugfs = debugfs_create_dir(dev_name(&gdev->dev),
1648                                            qeth_debugfs_root);
1649         debugfs_create_file("local_addrs", 0400, card->debugfs, card,
1650                             &qeth_debugfs_local_addr_fops);
1651
1652         card->qeth_service_level.seq_print = qeth_core_sl_print;
1653         register_service_level(&card->qeth_service_level);
1654         return card;
1655
1656 out_read_cmd:
1657         destroy_workqueue(card->event_wq);
1658 out_wq:
1659         dev_set_drvdata(&gdev->dev, NULL);
1660         kfree(card);
1661 out:
1662         return NULL;
1663 }
1664
1665 static int qeth_clear_channel(struct qeth_card *card,
1666                               struct qeth_channel *channel)
1667 {
1668         int rc;
1669
1670         QETH_CARD_TEXT(card, 3, "clearch");
1671         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1672         rc = ccw_device_clear(channel->ccwdev, (addr_t)channel->active_cmd);
1673         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1674
1675         if (rc)
1676                 return rc;
1677         rc = wait_event_interruptible_timeout(card->wait_q,
1678                         channel->state == CH_STATE_STOPPED, QETH_TIMEOUT);
1679         if (rc == -ERESTARTSYS)
1680                 return rc;
1681         if (channel->state != CH_STATE_STOPPED)
1682                 return -ETIME;
1683         channel->state = CH_STATE_DOWN;
1684         return 0;
1685 }
1686
1687 static int qeth_halt_channel(struct qeth_card *card,
1688                              struct qeth_channel *channel)
1689 {
1690         int rc;
1691
1692         QETH_CARD_TEXT(card, 3, "haltch");
1693         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1694         rc = ccw_device_halt(channel->ccwdev, (addr_t)channel->active_cmd);
1695         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1696
1697         if (rc)
1698                 return rc;
1699         rc = wait_event_interruptible_timeout(card->wait_q,
1700                         channel->state == CH_STATE_HALTED, QETH_TIMEOUT);
1701         if (rc == -ERESTARTSYS)
1702                 return rc;
1703         if (channel->state != CH_STATE_HALTED)
1704                 return -ETIME;
1705         return 0;
1706 }
1707
1708 static int qeth_stop_channel(struct qeth_channel *channel)
1709 {
1710         struct ccw_device *cdev = channel->ccwdev;
1711         int rc;
1712
1713         rc = ccw_device_set_offline(cdev);
1714
1715         spin_lock_irq(get_ccwdev_lock(cdev));
1716         if (channel->active_cmd) {
1717                 dev_err(&cdev->dev, "Stopped channel while cmd %px was still active\n",
1718                         channel->active_cmd);
1719                 channel->active_cmd = NULL;
1720         }
1721         cdev->handler = NULL;
1722         spin_unlock_irq(get_ccwdev_lock(cdev));
1723
1724         return rc;
1725 }
1726
1727 static int qeth_start_channel(struct qeth_channel *channel)
1728 {
1729         struct ccw_device *cdev = channel->ccwdev;
1730         int rc;
1731
1732         channel->state = CH_STATE_DOWN;
1733         atomic_set(&channel->irq_pending, 0);
1734
1735         spin_lock_irq(get_ccwdev_lock(cdev));
1736         cdev->handler = qeth_irq;
1737         spin_unlock_irq(get_ccwdev_lock(cdev));
1738
1739         rc = ccw_device_set_online(cdev);
1740         if (rc)
1741                 goto err;
1742
1743         return 0;
1744
1745 err:
1746         spin_lock_irq(get_ccwdev_lock(cdev));
1747         cdev->handler = NULL;
1748         spin_unlock_irq(get_ccwdev_lock(cdev));
1749         return rc;
1750 }
1751
1752 static int qeth_halt_channels(struct qeth_card *card)
1753 {
1754         int rc1 = 0, rc2 = 0, rc3 = 0;
1755
1756         QETH_CARD_TEXT(card, 3, "haltchs");
1757         rc1 = qeth_halt_channel(card, &card->read);
1758         rc2 = qeth_halt_channel(card, &card->write);
1759         rc3 = qeth_halt_channel(card, &card->data);
1760         if (rc1)
1761                 return rc1;
1762         if (rc2)
1763                 return rc2;
1764         return rc3;
1765 }
1766
1767 static int qeth_clear_channels(struct qeth_card *card)
1768 {
1769         int rc1 = 0, rc2 = 0, rc3 = 0;
1770
1771         QETH_CARD_TEXT(card, 3, "clearchs");
1772         rc1 = qeth_clear_channel(card, &card->read);
1773         rc2 = qeth_clear_channel(card, &card->write);
1774         rc3 = qeth_clear_channel(card, &card->data);
1775         if (rc1)
1776                 return rc1;
1777         if (rc2)
1778                 return rc2;
1779         return rc3;
1780 }
1781
1782 static int qeth_clear_halt_card(struct qeth_card *card, int halt)
1783 {
1784         int rc = 0;
1785
1786         QETH_CARD_TEXT(card, 3, "clhacrd");
1787
1788         if (halt)
1789                 rc = qeth_halt_channels(card);
1790         if (rc)
1791                 return rc;
1792         return qeth_clear_channels(card);
1793 }
1794
1795 static int qeth_qdio_clear_card(struct qeth_card *card, int use_halt)
1796 {
1797         int rc = 0;
1798
1799         QETH_CARD_TEXT(card, 3, "qdioclr");
1800         switch (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ESTABLISHED,
1801                 QETH_QDIO_CLEANING)) {
1802         case QETH_QDIO_ESTABLISHED:
1803                 if (IS_IQD(card))
1804                         rc = qdio_shutdown(CARD_DDEV(card),
1805                                 QDIO_FLAG_CLEANUP_USING_HALT);
1806                 else
1807                         rc = qdio_shutdown(CARD_DDEV(card),
1808                                 QDIO_FLAG_CLEANUP_USING_CLEAR);
1809                 if (rc)
1810                         QETH_CARD_TEXT_(card, 3, "1err%d", rc);
1811                 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
1812                 break;
1813         case QETH_QDIO_CLEANING:
1814                 return rc;
1815         default:
1816                 break;
1817         }
1818         rc = qeth_clear_halt_card(card, use_halt);
1819         if (rc)
1820                 QETH_CARD_TEXT_(card, 3, "2err%d", rc);
1821         return rc;
1822 }
1823
1824 static enum qeth_discipline_id qeth_vm_detect_layer(struct qeth_card *card)
1825 {
1826         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1827         struct diag26c_vnic_resp *response = NULL;
1828         struct diag26c_vnic_req *request = NULL;
1829         struct ccw_dev_id id;
1830         char userid[80];
1831         int rc = 0;
1832
1833         QETH_CARD_TEXT(card, 2, "vmlayer");
1834
1835         cpcmd("QUERY USERID", userid, sizeof(userid), &rc);
1836         if (rc)
1837                 goto out;
1838
1839         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
1840         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
1841         if (!request || !response) {
1842                 rc = -ENOMEM;
1843                 goto out;
1844         }
1845
1846         ccw_device_get_id(CARD_RDEV(card), &id);
1847         request->resp_buf_len = sizeof(*response);
1848         request->resp_version = DIAG26C_VERSION6_VM65918;
1849         request->req_format = DIAG26C_VNIC_INFO;
1850         ASCEBC(userid, 8);
1851         memcpy(&request->sys_name, userid, 8);
1852         request->devno = id.devno;
1853
1854         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1855         rc = diag26c(request, response, DIAG26C_PORT_VNIC);
1856         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1857         if (rc)
1858                 goto out;
1859         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
1860
1861         if (request->resp_buf_len < sizeof(*response) ||
1862             response->version != request->resp_version) {
1863                 rc = -EIO;
1864                 goto out;
1865         }
1866
1867         if (response->protocol == VNIC_INFO_PROT_L2)
1868                 disc = QETH_DISCIPLINE_LAYER2;
1869         else if (response->protocol == VNIC_INFO_PROT_L3)
1870                 disc = QETH_DISCIPLINE_LAYER3;
1871
1872 out:
1873         kfree(response);
1874         kfree(request);
1875         if (rc)
1876                 QETH_CARD_TEXT_(card, 2, "err%x", rc);
1877         return disc;
1878 }
1879
1880 /* Determine whether the device requires a specific layer discipline */
1881 static enum qeth_discipline_id qeth_enforce_discipline(struct qeth_card *card)
1882 {
1883         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1884
1885         if (IS_OSM(card) || IS_OSN(card))
1886                 disc = QETH_DISCIPLINE_LAYER2;
1887         else if (IS_VM_NIC(card))
1888                 disc = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
1889                                       qeth_vm_detect_layer(card);
1890
1891         switch (disc) {
1892         case QETH_DISCIPLINE_LAYER2:
1893                 QETH_CARD_TEXT(card, 3, "force l2");
1894                 break;
1895         case QETH_DISCIPLINE_LAYER3:
1896                 QETH_CARD_TEXT(card, 3, "force l3");
1897                 break;
1898         default:
1899                 QETH_CARD_TEXT(card, 3, "force no");
1900         }
1901
1902         return disc;
1903 }
1904
1905 static void qeth_set_blkt_defaults(struct qeth_card *card)
1906 {
1907         QETH_CARD_TEXT(card, 2, "cfgblkt");
1908
1909         if (card->info.use_v1_blkt) {
1910                 card->info.blkt.time_total = 0;
1911                 card->info.blkt.inter_packet = 0;
1912                 card->info.blkt.inter_packet_jumbo = 0;
1913         } else {
1914                 card->info.blkt.time_total = 250;
1915                 card->info.blkt.inter_packet = 5;
1916                 card->info.blkt.inter_packet_jumbo = 15;
1917         }
1918 }
1919
1920 static void qeth_idx_init(struct qeth_card *card)
1921 {
1922         memset(&card->seqno, 0, sizeof(card->seqno));
1923
1924         card->token.issuer_rm_w = 0x00010103UL;
1925         card->token.cm_filter_w = 0x00010108UL;
1926         card->token.cm_connection_w = 0x0001010aUL;
1927         card->token.ulp_filter_w = 0x0001010bUL;
1928         card->token.ulp_connection_w = 0x0001010dUL;
1929
1930         switch (card->info.type) {
1931         case QETH_CARD_TYPE_IQD:
1932                 card->info.func_level = QETH_IDX_FUNC_LEVEL_IQD;
1933                 break;
1934         case QETH_CARD_TYPE_OSD:
1935         case QETH_CARD_TYPE_OSN:
1936                 card->info.func_level = QETH_IDX_FUNC_LEVEL_OSD;
1937                 break;
1938         default:
1939                 break;
1940         }
1941 }
1942
1943 static void qeth_idx_finalize_cmd(struct qeth_card *card,
1944                                   struct qeth_cmd_buffer *iob)
1945 {
1946         memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data), &card->seqno.trans_hdr,
1947                QETH_SEQ_NO_LENGTH);
1948         if (iob->channel == &card->write)
1949                 card->seqno.trans_hdr++;
1950 }
1951
1952 static int qeth_peer_func_level(int level)
1953 {
1954         if ((level & 0xff) == 8)
1955                 return (level & 0xff) + 0x400;
1956         if (((level >> 8) & 3) == 1)
1957                 return (level & 0xff) + 0x200;
1958         return level;
1959 }
1960
1961 static void qeth_mpc_finalize_cmd(struct qeth_card *card,
1962                                   struct qeth_cmd_buffer *iob)
1963 {
1964         qeth_idx_finalize_cmd(card, iob);
1965
1966         memcpy(QETH_PDU_HEADER_SEQ_NO(iob->data),
1967                &card->seqno.pdu_hdr, QETH_SEQ_NO_LENGTH);
1968         card->seqno.pdu_hdr++;
1969         memcpy(QETH_PDU_HEADER_ACK_SEQ_NO(iob->data),
1970                &card->seqno.pdu_hdr_ack, QETH_SEQ_NO_LENGTH);
1971
1972         iob->callback = qeth_release_buffer_cb;
1973 }
1974
1975 static bool qeth_mpc_match_reply(struct qeth_cmd_buffer *iob,
1976                                  struct qeth_cmd_buffer *reply)
1977 {
1978         /* MPC cmds are issued strictly in sequence. */
1979         return !IS_IPA(reply->data);
1980 }
1981
1982 static struct qeth_cmd_buffer *qeth_mpc_alloc_cmd(struct qeth_card *card,
1983                                                   const void *data,
1984                                                   unsigned int data_length)
1985 {
1986         struct qeth_cmd_buffer *iob;
1987
1988         iob = qeth_alloc_cmd(&card->write, data_length, 1, QETH_TIMEOUT);
1989         if (!iob)
1990                 return NULL;
1991
1992         memcpy(iob->data, data, data_length);
1993         qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, data_length,
1994                        iob->data);
1995         iob->finalize = qeth_mpc_finalize_cmd;
1996         iob->match = qeth_mpc_match_reply;
1997         return iob;
1998 }
1999
2000 /**
2001  * qeth_send_control_data() -   send control command to the card
2002  * @card:                       qeth_card structure pointer
2003  * @iob:                        qeth_cmd_buffer pointer
2004  * @reply_cb:                   callback function pointer
2005  * @cb_card:                    pointer to the qeth_card structure
2006  * @cb_reply:                   pointer to the qeth_reply structure
2007  * @cb_cmd:                     pointer to the original iob for non-IPA
2008  *                              commands, or to the qeth_ipa_cmd structure
2009  *                              for the IPA commands.
2010  * @reply_param:                private pointer passed to the callback
2011  *
2012  * Callback function gets called one or more times, with cb_cmd
2013  * pointing to the response returned by the hardware. Callback
2014  * function must return
2015  *   > 0 if more reply blocks are expected,
2016  *     0 if the last or only reply block is received, and
2017  *   < 0 on error.
2018  * Callback function can get the value of the reply_param pointer from the
2019  * field 'param' of the structure qeth_reply.
2020  */
2021
2022 static int qeth_send_control_data(struct qeth_card *card,
2023                                   struct qeth_cmd_buffer *iob,
2024                                   int (*reply_cb)(struct qeth_card *cb_card,
2025                                                   struct qeth_reply *cb_reply,
2026                                                   unsigned long cb_cmd),
2027                                   void *reply_param)
2028 {
2029         struct qeth_channel *channel = iob->channel;
2030         struct qeth_reply *reply = &iob->reply;
2031         long timeout = iob->timeout;
2032         int rc;
2033
2034         QETH_CARD_TEXT(card, 2, "sendctl");
2035
2036         reply->callback = reply_cb;
2037         reply->param = reply_param;
2038
2039         timeout = wait_event_interruptible_timeout(card->wait_q,
2040                                                    qeth_trylock_channel(channel),
2041                                                    timeout);
2042         if (timeout <= 0) {
2043                 qeth_put_cmd(iob);
2044                 return (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
2045         }
2046
2047         if (iob->finalize)
2048                 iob->finalize(card, iob);
2049         QETH_DBF_HEX(CTRL, 2, iob->data, min(iob->length, QETH_DBF_CTRL_LEN));
2050
2051         qeth_enqueue_cmd(card, iob);
2052
2053         /* This pairs with iob->callback, and keeps the iob alive after IO: */
2054         qeth_get_cmd(iob);
2055
2056         QETH_CARD_TEXT(card, 6, "noirqpnd");
2057         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
2058         rc = ccw_device_start_timeout(channel->ccwdev, __ccw_from_cmd(iob),
2059                                       (addr_t) iob, 0, 0, timeout);
2060         if (!rc)
2061                 channel->active_cmd = iob;
2062         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
2063         if (rc) {
2064                 QETH_DBF_MESSAGE(2, "qeth_send_control_data on device %x: ccw_device_start rc = %i\n",
2065                                  CARD_DEVID(card), rc);
2066                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
2067                 qeth_dequeue_cmd(card, iob);
2068                 qeth_put_cmd(iob);
2069                 qeth_unlock_channel(card, channel);
2070                 goto out;
2071         }
2072
2073         timeout = wait_for_completion_interruptible_timeout(&iob->done,
2074                                                             timeout);
2075         if (timeout <= 0)
2076                 rc = (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
2077
2078         qeth_dequeue_cmd(card, iob);
2079
2080         if (reply_cb) {
2081                 /* Wait until the callback for a late reply has completed: */
2082                 spin_lock_irq(&iob->lock);
2083                 if (rc)
2084                         /* Zap any callback that's still pending: */
2085                         iob->rc = rc;
2086                 spin_unlock_irq(&iob->lock);
2087         }
2088
2089         if (!rc)
2090                 rc = iob->rc;
2091
2092 out:
2093         qeth_put_cmd(iob);
2094         return rc;
2095 }
2096
2097 struct qeth_node_desc {
2098         struct node_descriptor nd1;
2099         struct node_descriptor nd2;
2100         struct node_descriptor nd3;
2101 };
2102
2103 static void qeth_read_conf_data_cb(struct qeth_card *card,
2104                                    struct qeth_cmd_buffer *iob,
2105                                    unsigned int data_length)
2106 {
2107         struct qeth_node_desc *nd = (struct qeth_node_desc *) iob->data;
2108         int rc = 0;
2109         u8 *tag;
2110
2111         QETH_CARD_TEXT(card, 2, "cfgunit");
2112
2113         if (data_length < sizeof(*nd)) {
2114                 rc = -EINVAL;
2115                 goto out;
2116         }
2117
2118         card->info.is_vm_nic = nd->nd1.plant[0] == _ascebc['V'] &&
2119                                nd->nd1.plant[1] == _ascebc['M'];
2120         tag = (u8 *)&nd->nd1.tag;
2121         card->info.chpid = tag[0];
2122         card->info.unit_addr2 = tag[1];
2123
2124         tag = (u8 *)&nd->nd2.tag;
2125         card->info.cula = tag[1];
2126
2127         card->info.use_v1_blkt = nd->nd3.model[0] == 0xF0 &&
2128                                  nd->nd3.model[1] == 0xF0 &&
2129                                  nd->nd3.model[2] >= 0xF1 &&
2130                                  nd->nd3.model[2] <= 0xF4;
2131
2132 out:
2133         qeth_notify_cmd(iob, rc);
2134         qeth_put_cmd(iob);
2135 }
2136
2137 static int qeth_read_conf_data(struct qeth_card *card)
2138 {
2139         struct qeth_channel *channel = &card->data;
2140         struct qeth_cmd_buffer *iob;
2141         struct ciw *ciw;
2142
2143         /* scan for RCD command in extended SenseID data */
2144         ciw = ccw_device_get_ciw(channel->ccwdev, CIW_TYPE_RCD);
2145         if (!ciw || ciw->cmd == 0)
2146                 return -EOPNOTSUPP;
2147         if (ciw->count < sizeof(struct qeth_node_desc))
2148                 return -EINVAL;
2149
2150         iob = qeth_alloc_cmd(channel, ciw->count, 1, QETH_RCD_TIMEOUT);
2151         if (!iob)
2152                 return -ENOMEM;
2153
2154         iob->callback = qeth_read_conf_data_cb;
2155         qeth_setup_ccw(__ccw_from_cmd(iob), ciw->cmd, 0, iob->length,
2156                        iob->data);
2157
2158         return qeth_send_control_data(card, iob, NULL, NULL);
2159 }
2160
2161 static int qeth_idx_check_activate_response(struct qeth_card *card,
2162                                             struct qeth_channel *channel,
2163                                             struct qeth_cmd_buffer *iob)
2164 {
2165         int rc;
2166
2167         rc = qeth_check_idx_response(card, iob->data);
2168         if (rc)
2169                 return rc;
2170
2171         if (QETH_IS_IDX_ACT_POS_REPLY(iob->data))
2172                 return 0;
2173
2174         /* negative reply: */
2175         QETH_CARD_TEXT_(card, 2, "idxneg%c",
2176                         QETH_IDX_ACT_CAUSE_CODE(iob->data));
2177
2178         switch (QETH_IDX_ACT_CAUSE_CODE(iob->data)) {
2179         case QETH_IDX_ACT_ERR_EXCL:
2180                 dev_err(&channel->ccwdev->dev,
2181                         "The adapter is used exclusively by another host\n");
2182                 return -EBUSY;
2183         case QETH_IDX_ACT_ERR_AUTH:
2184         case QETH_IDX_ACT_ERR_AUTH_USER:
2185                 dev_err(&channel->ccwdev->dev,
2186                         "Setting the device online failed because of insufficient authorization\n");
2187                 return -EPERM;
2188         default:
2189                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: negative reply\n",
2190                                  CCW_DEVID(channel->ccwdev));
2191                 return -EIO;
2192         }
2193 }
2194
2195 static void qeth_idx_activate_read_channel_cb(struct qeth_card *card,
2196                                               struct qeth_cmd_buffer *iob,
2197                                               unsigned int data_length)
2198 {
2199         struct qeth_channel *channel = iob->channel;
2200         u16 peer_level;
2201         int rc;
2202
2203         QETH_CARD_TEXT(card, 2, "idxrdcb");
2204
2205         rc = qeth_idx_check_activate_response(card, channel, iob);
2206         if (rc)
2207                 goto out;
2208
2209         memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2210         if (peer_level != qeth_peer_func_level(card->info.func_level)) {
2211                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
2212                                  CCW_DEVID(channel->ccwdev),
2213                                  card->info.func_level, peer_level);
2214                 rc = -EINVAL;
2215                 goto out;
2216         }
2217
2218         memcpy(&card->token.issuer_rm_r,
2219                QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2220                QETH_MPC_TOKEN_LENGTH);
2221         memcpy(&card->info.mcl_level[0],
2222                QETH_IDX_REPLY_LEVEL(iob->data), QETH_MCL_LENGTH);
2223
2224 out:
2225         qeth_notify_cmd(iob, rc);
2226         qeth_put_cmd(iob);
2227 }
2228
2229 static void qeth_idx_activate_write_channel_cb(struct qeth_card *card,
2230                                                struct qeth_cmd_buffer *iob,
2231                                                unsigned int data_length)
2232 {
2233         struct qeth_channel *channel = iob->channel;
2234         u16 peer_level;
2235         int rc;
2236
2237         QETH_CARD_TEXT(card, 2, "idxwrcb");
2238
2239         rc = qeth_idx_check_activate_response(card, channel, iob);
2240         if (rc)
2241                 goto out;
2242
2243         memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2244         if ((peer_level & ~0x0100) !=
2245             qeth_peer_func_level(card->info.func_level)) {
2246                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
2247                                  CCW_DEVID(channel->ccwdev),
2248                                  card->info.func_level, peer_level);
2249                 rc = -EINVAL;
2250         }
2251
2252 out:
2253         qeth_notify_cmd(iob, rc);
2254         qeth_put_cmd(iob);
2255 }
2256
2257 static void qeth_idx_setup_activate_cmd(struct qeth_card *card,
2258                                         struct qeth_cmd_buffer *iob)
2259 {
2260         u16 addr = (card->info.cula << 8) + card->info.unit_addr2;
2261         u8 port = ((u8)card->dev->dev_port) | 0x80;
2262         struct ccw1 *ccw = __ccw_from_cmd(iob);
2263
2264         qeth_setup_ccw(&ccw[0], CCW_CMD_WRITE, CCW_FLAG_CC, IDX_ACTIVATE_SIZE,
2265                        iob->data);
2266         qeth_setup_ccw(&ccw[1], CCW_CMD_READ, 0, iob->length, iob->data);
2267         iob->finalize = qeth_idx_finalize_cmd;
2268
2269         port |= QETH_IDX_ACT_INVAL_FRAME;
2270         memcpy(QETH_IDX_ACT_PNO(iob->data), &port, 1);
2271         memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2272                &card->token.issuer_rm_w, QETH_MPC_TOKEN_LENGTH);
2273         memcpy(QETH_IDX_ACT_FUNC_LEVEL(iob->data),
2274                &card->info.func_level, 2);
2275         memcpy(QETH_IDX_ACT_QDIO_DEV_CUA(iob->data), &card->info.ddev_devno, 2);
2276         memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &addr, 2);
2277 }
2278
2279 static int qeth_idx_activate_read_channel(struct qeth_card *card)
2280 {
2281         struct qeth_channel *channel = &card->read;
2282         struct qeth_cmd_buffer *iob;
2283         int rc;
2284
2285         QETH_CARD_TEXT(card, 2, "idxread");
2286
2287         iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
2288         if (!iob)
2289                 return -ENOMEM;
2290
2291         memcpy(iob->data, IDX_ACTIVATE_READ, IDX_ACTIVATE_SIZE);
2292         qeth_idx_setup_activate_cmd(card, iob);
2293         iob->callback = qeth_idx_activate_read_channel_cb;
2294
2295         rc = qeth_send_control_data(card, iob, NULL, NULL);
2296         if (rc)
2297                 return rc;
2298
2299         channel->state = CH_STATE_UP;
2300         return 0;
2301 }
2302
2303 static int qeth_idx_activate_write_channel(struct qeth_card *card)
2304 {
2305         struct qeth_channel *channel = &card->write;
2306         struct qeth_cmd_buffer *iob;
2307         int rc;
2308
2309         QETH_CARD_TEXT(card, 2, "idxwrite");
2310
2311         iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
2312         if (!iob)
2313                 return -ENOMEM;
2314
2315         memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE);
2316         qeth_idx_setup_activate_cmd(card, iob);
2317         iob->callback = qeth_idx_activate_write_channel_cb;
2318
2319         rc = qeth_send_control_data(card, iob, NULL, NULL);
2320         if (rc)
2321                 return rc;
2322
2323         channel->state = CH_STATE_UP;
2324         return 0;
2325 }
2326
2327 static int qeth_cm_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2328                 unsigned long data)
2329 {
2330         struct qeth_cmd_buffer *iob;
2331
2332         QETH_CARD_TEXT(card, 2, "cmenblcb");
2333
2334         iob = (struct qeth_cmd_buffer *) data;
2335         memcpy(&card->token.cm_filter_r,
2336                QETH_CM_ENABLE_RESP_FILTER_TOKEN(iob->data),
2337                QETH_MPC_TOKEN_LENGTH);
2338         return 0;
2339 }
2340
2341 static int qeth_cm_enable(struct qeth_card *card)
2342 {
2343         struct qeth_cmd_buffer *iob;
2344
2345         QETH_CARD_TEXT(card, 2, "cmenable");
2346
2347         iob = qeth_mpc_alloc_cmd(card, CM_ENABLE, CM_ENABLE_SIZE);
2348         if (!iob)
2349                 return -ENOMEM;
2350
2351         memcpy(QETH_CM_ENABLE_ISSUER_RM_TOKEN(iob->data),
2352                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2353         memcpy(QETH_CM_ENABLE_FILTER_TOKEN(iob->data),
2354                &card->token.cm_filter_w, QETH_MPC_TOKEN_LENGTH);
2355
2356         return qeth_send_control_data(card, iob, qeth_cm_enable_cb, NULL);
2357 }
2358
2359 static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2360                 unsigned long data)
2361 {
2362         struct qeth_cmd_buffer *iob;
2363
2364         QETH_CARD_TEXT(card, 2, "cmsetpcb");
2365
2366         iob = (struct qeth_cmd_buffer *) data;
2367         memcpy(&card->token.cm_connection_r,
2368                QETH_CM_SETUP_RESP_DEST_ADDR(iob->data),
2369                QETH_MPC_TOKEN_LENGTH);
2370         return 0;
2371 }
2372
2373 static int qeth_cm_setup(struct qeth_card *card)
2374 {
2375         struct qeth_cmd_buffer *iob;
2376
2377         QETH_CARD_TEXT(card, 2, "cmsetup");
2378
2379         iob = qeth_mpc_alloc_cmd(card, CM_SETUP, CM_SETUP_SIZE);
2380         if (!iob)
2381                 return -ENOMEM;
2382
2383         memcpy(QETH_CM_SETUP_DEST_ADDR(iob->data),
2384                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2385         memcpy(QETH_CM_SETUP_CONNECTION_TOKEN(iob->data),
2386                &card->token.cm_connection_w, QETH_MPC_TOKEN_LENGTH);
2387         memcpy(QETH_CM_SETUP_FILTER_TOKEN(iob->data),
2388                &card->token.cm_filter_r, QETH_MPC_TOKEN_LENGTH);
2389         return qeth_send_control_data(card, iob, qeth_cm_setup_cb, NULL);
2390 }
2391
2392 static bool qeth_is_supported_link_type(struct qeth_card *card, u8 link_type)
2393 {
2394         if (link_type == QETH_LINK_TYPE_LANE_TR ||
2395             link_type == QETH_LINK_TYPE_HSTR) {
2396                 dev_err(&card->gdev->dev, "Unsupported Token Ring device\n");
2397                 return false;
2398         }
2399
2400         return true;
2401 }
2402
2403 static int qeth_update_max_mtu(struct qeth_card *card, unsigned int max_mtu)
2404 {
2405         struct net_device *dev = card->dev;
2406         unsigned int new_mtu;
2407
2408         if (!max_mtu) {
2409                 /* IQD needs accurate max MTU to set up its RX buffers: */
2410                 if (IS_IQD(card))
2411                         return -EINVAL;
2412                 /* tolerate quirky HW: */
2413                 max_mtu = ETH_MAX_MTU;
2414         }
2415
2416         rtnl_lock();
2417         if (IS_IQD(card)) {
2418                 /* move any device with default MTU to new max MTU: */
2419                 new_mtu = (dev->mtu == dev->max_mtu) ? max_mtu : dev->mtu;
2420
2421                 /* adjust RX buffer size to new max MTU: */
2422                 card->qdio.in_buf_size = max_mtu + 2 * PAGE_SIZE;
2423                 if (dev->max_mtu && dev->max_mtu != max_mtu)
2424                         qeth_free_qdio_queues(card);
2425         } else {
2426                 if (dev->mtu)
2427                         new_mtu = dev->mtu;
2428                 /* default MTUs for first setup: */
2429                 else if (IS_LAYER2(card))
2430                         new_mtu = ETH_DATA_LEN;
2431                 else
2432                         new_mtu = ETH_DATA_LEN - 8; /* allow for LLC + SNAP */
2433         }
2434
2435         dev->max_mtu = max_mtu;
2436         dev->mtu = min(new_mtu, max_mtu);
2437         rtnl_unlock();
2438         return 0;
2439 }
2440
2441 static int qeth_get_mtu_outof_framesize(int framesize)
2442 {
2443         switch (framesize) {
2444         case 0x4000:
2445                 return 8192;
2446         case 0x6000:
2447                 return 16384;
2448         case 0xa000:
2449                 return 32768;
2450         case 0xffff:
2451                 return 57344;
2452         default:
2453                 return 0;
2454         }
2455 }
2456
2457 static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2458                 unsigned long data)
2459 {
2460         __u16 mtu, framesize;
2461         __u16 len;
2462         struct qeth_cmd_buffer *iob;
2463         u8 link_type = 0;
2464
2465         QETH_CARD_TEXT(card, 2, "ulpenacb");
2466
2467         iob = (struct qeth_cmd_buffer *) data;
2468         memcpy(&card->token.ulp_filter_r,
2469                QETH_ULP_ENABLE_RESP_FILTER_TOKEN(iob->data),
2470                QETH_MPC_TOKEN_LENGTH);
2471         if (IS_IQD(card)) {
2472                 memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2);
2473                 mtu = qeth_get_mtu_outof_framesize(framesize);
2474         } else {
2475                 mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data);
2476         }
2477         *(u16 *)reply->param = mtu;
2478
2479         memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2);
2480         if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) {
2481                 memcpy(&link_type,
2482                        QETH_ULP_ENABLE_RESP_LINK_TYPE(iob->data), 1);
2483                 if (!qeth_is_supported_link_type(card, link_type))
2484                         return -EPROTONOSUPPORT;
2485         }
2486
2487         card->info.link_type = link_type;
2488         QETH_CARD_TEXT_(card, 2, "link%d", card->info.link_type);
2489         return 0;
2490 }
2491
2492 static u8 qeth_mpc_select_prot_type(struct qeth_card *card)
2493 {
2494         if (IS_OSN(card))
2495                 return QETH_PROT_OSN2;
2496         return IS_LAYER2(card) ? QETH_PROT_LAYER2 : QETH_PROT_TCPIP;
2497 }
2498
2499 static int qeth_ulp_enable(struct qeth_card *card)
2500 {
2501         u8 prot_type = qeth_mpc_select_prot_type(card);
2502         struct qeth_cmd_buffer *iob;
2503         u16 max_mtu;
2504         int rc;
2505
2506         QETH_CARD_TEXT(card, 2, "ulpenabl");
2507
2508         iob = qeth_mpc_alloc_cmd(card, ULP_ENABLE, ULP_ENABLE_SIZE);
2509         if (!iob)
2510                 return -ENOMEM;
2511
2512         *(QETH_ULP_ENABLE_LINKNUM(iob->data)) = (u8) card->dev->dev_port;
2513         memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1);
2514         memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data),
2515                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2516         memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data),
2517                &card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH);
2518         rc = qeth_send_control_data(card, iob, qeth_ulp_enable_cb, &max_mtu);
2519         if (rc)
2520                 return rc;
2521         return qeth_update_max_mtu(card, max_mtu);
2522 }
2523
2524 static int qeth_ulp_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2525                 unsigned long data)
2526 {
2527         struct qeth_cmd_buffer *iob;
2528
2529         QETH_CARD_TEXT(card, 2, "ulpstpcb");
2530
2531         iob = (struct qeth_cmd_buffer *) data;
2532         memcpy(&card->token.ulp_connection_r,
2533                QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2534                QETH_MPC_TOKEN_LENGTH);
2535         if (!strncmp("00S", QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2536                      3)) {
2537                 QETH_CARD_TEXT(card, 2, "olmlimit");
2538                 dev_err(&card->gdev->dev, "A connection could not be "
2539                         "established because of an OLM limit\n");
2540                 return -EMLINK;
2541         }
2542         return 0;
2543 }
2544
2545 static int qeth_ulp_setup(struct qeth_card *card)
2546 {
2547         __u16 temp;
2548         struct qeth_cmd_buffer *iob;
2549
2550         QETH_CARD_TEXT(card, 2, "ulpsetup");
2551
2552         iob = qeth_mpc_alloc_cmd(card, ULP_SETUP, ULP_SETUP_SIZE);
2553         if (!iob)
2554                 return -ENOMEM;
2555
2556         memcpy(QETH_ULP_SETUP_DEST_ADDR(iob->data),
2557                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2558         memcpy(QETH_ULP_SETUP_CONNECTION_TOKEN(iob->data),
2559                &card->token.ulp_connection_w, QETH_MPC_TOKEN_LENGTH);
2560         memcpy(QETH_ULP_SETUP_FILTER_TOKEN(iob->data),
2561                &card->token.ulp_filter_r, QETH_MPC_TOKEN_LENGTH);
2562
2563         memcpy(QETH_ULP_SETUP_CUA(iob->data), &card->info.ddev_devno, 2);
2564         temp = (card->info.cula << 8) + card->info.unit_addr2;
2565         memcpy(QETH_ULP_SETUP_REAL_DEVADDR(iob->data), &temp, 2);
2566         return qeth_send_control_data(card, iob, qeth_ulp_setup_cb, NULL);
2567 }
2568
2569 static int qeth_alloc_out_buf(struct qeth_qdio_out_q *q, unsigned int bidx,
2570                               gfp_t gfp)
2571 {
2572         struct qeth_qdio_out_buffer *newbuf;
2573
2574         newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, gfp);
2575         if (!newbuf)
2576                 return -ENOMEM;
2577
2578         newbuf->buffer = q->qdio_bufs[bidx];
2579         skb_queue_head_init(&newbuf->skb_list);
2580         lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key);
2581         newbuf->q = q;
2582         atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY);
2583         q->bufs[bidx] = newbuf;
2584         return 0;
2585 }
2586
2587 static void qeth_free_output_queue(struct qeth_qdio_out_q *q)
2588 {
2589         if (!q)
2590                 return;
2591
2592         qeth_drain_output_queue(q, true);
2593         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2594         kfree(q);
2595 }
2596
2597 static struct qeth_qdio_out_q *qeth_alloc_output_queue(void)
2598 {
2599         struct qeth_qdio_out_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
2600         unsigned int i;
2601
2602         if (!q)
2603                 return NULL;
2604
2605         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q))
2606                 goto err_qdio_bufs;
2607
2608         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) {
2609                 if (qeth_alloc_out_buf(q, i, GFP_KERNEL))
2610                         goto err_out_bufs;
2611         }
2612
2613         return q;
2614
2615 err_out_bufs:
2616         while (i > 0)
2617                 qeth_free_out_buf(q->bufs[--i]);
2618         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2619 err_qdio_bufs:
2620         kfree(q);
2621         return NULL;
2622 }
2623
2624 static void qeth_tx_completion_timer(struct timer_list *timer)
2625 {
2626         struct qeth_qdio_out_q *queue = from_timer(queue, timer, timer);
2627
2628         napi_schedule(&queue->napi);
2629         QETH_TXQ_STAT_INC(queue, completion_timer);
2630 }
2631
2632 static int qeth_alloc_qdio_queues(struct qeth_card *card)
2633 {
2634         unsigned int i;
2635
2636         QETH_CARD_TEXT(card, 2, "allcqdbf");
2637
2638         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED,
2639                 QETH_QDIO_ALLOCATED) != QETH_QDIO_UNINITIALIZED)
2640                 return 0;
2641
2642         QETH_CARD_TEXT(card, 2, "inq");
2643         card->qdio.in_q = qeth_alloc_qdio_queue();
2644         if (!card->qdio.in_q)
2645                 goto out_nomem;
2646
2647         /* inbound buffer pool */
2648         if (qeth_alloc_buffer_pool(card))
2649                 goto out_freeinq;
2650
2651         /* outbound */
2652         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2653                 struct qeth_qdio_out_q *queue;
2654
2655                 queue = qeth_alloc_output_queue();
2656                 if (!queue)
2657                         goto out_freeoutq;
2658                 QETH_CARD_TEXT_(card, 2, "outq %i", i);
2659                 QETH_CARD_HEX(card, 2, &queue, sizeof(void *));
2660                 card->qdio.out_qs[i] = queue;
2661                 queue->card = card;
2662                 queue->queue_no = i;
2663                 INIT_LIST_HEAD(&queue->pending_bufs);
2664                 spin_lock_init(&queue->lock);
2665                 timer_setup(&queue->timer, qeth_tx_completion_timer, 0);
2666                 queue->coalesce_usecs = QETH_TX_COALESCE_USECS;
2667                 queue->max_coalesced_frames = QETH_TX_MAX_COALESCED_FRAMES;
2668                 queue->priority = QETH_QIB_PQUE_PRIO_DEFAULT;
2669         }
2670
2671         /* completion */
2672         if (qeth_alloc_cq(card))
2673                 goto out_freeoutq;
2674
2675         return 0;
2676
2677 out_freeoutq:
2678         while (i > 0) {
2679                 qeth_free_output_queue(card->qdio.out_qs[--i]);
2680                 card->qdio.out_qs[i] = NULL;
2681         }
2682         qeth_free_buffer_pool(card);
2683 out_freeinq:
2684         qeth_free_qdio_queue(card->qdio.in_q);
2685         card->qdio.in_q = NULL;
2686 out_nomem:
2687         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
2688         return -ENOMEM;
2689 }
2690
2691 static void qeth_free_qdio_queues(struct qeth_card *card)
2692 {
2693         int i, j;
2694
2695         if (atomic_xchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED) ==
2696                 QETH_QDIO_UNINITIALIZED)
2697                 return;
2698
2699         qeth_free_cq(card);
2700         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2701                 if (card->qdio.in_q->bufs[j].rx_skb)
2702                         dev_kfree_skb_any(card->qdio.in_q->bufs[j].rx_skb);
2703         }
2704         qeth_free_qdio_queue(card->qdio.in_q);
2705         card->qdio.in_q = NULL;
2706         /* inbound buffer pool */
2707         qeth_free_buffer_pool(card);
2708         /* free outbound qdio_qs */
2709         for (i = 0; i < card->qdio.no_out_queues; i++) {
2710                 qeth_free_output_queue(card->qdio.out_qs[i]);
2711                 card->qdio.out_qs[i] = NULL;
2712         }
2713 }
2714
2715 static void qeth_fill_qib_parms(struct qeth_card *card,
2716                                 struct qeth_qib_parms *parms)
2717 {
2718         struct qeth_qdio_out_q *queue;
2719         unsigned int i;
2720
2721         parms->pcit_magic[0] = 'P';
2722         parms->pcit_magic[1] = 'C';
2723         parms->pcit_magic[2] = 'I';
2724         parms->pcit_magic[3] = 'T';
2725         ASCEBC(parms->pcit_magic, sizeof(parms->pcit_magic));
2726         parms->pcit_a = QETH_PCI_THRESHOLD_A(card);
2727         parms->pcit_b = QETH_PCI_THRESHOLD_B(card);
2728         parms->pcit_c = QETH_PCI_TIMER_VALUE(card);
2729
2730         parms->blkt_magic[0] = 'B';
2731         parms->blkt_magic[1] = 'L';
2732         parms->blkt_magic[2] = 'K';
2733         parms->blkt_magic[3] = 'T';
2734         ASCEBC(parms->blkt_magic, sizeof(parms->blkt_magic));
2735         parms->blkt_total = card->info.blkt.time_total;
2736         parms->blkt_inter_packet = card->info.blkt.inter_packet;
2737         parms->blkt_inter_packet_jumbo = card->info.blkt.inter_packet_jumbo;
2738
2739         /* Prio-queueing implicitly uses the default priorities: */
2740         if (qeth_uses_tx_prio_queueing(card) || card->qdio.no_out_queues == 1)
2741                 return;
2742
2743         parms->pque_magic[0] = 'P';
2744         parms->pque_magic[1] = 'Q';
2745         parms->pque_magic[2] = 'U';
2746         parms->pque_magic[3] = 'E';
2747         ASCEBC(parms->pque_magic, sizeof(parms->pque_magic));
2748         parms->pque_order = QETH_QIB_PQUE_ORDER_RR;
2749         parms->pque_units = QETH_QIB_PQUE_UNITS_SBAL;
2750
2751         qeth_for_each_output_queue(card, queue, i)
2752                 parms->pque_priority[i] = queue->priority;
2753 }
2754
2755 static int qeth_qdio_activate(struct qeth_card *card)
2756 {
2757         QETH_CARD_TEXT(card, 3, "qdioact");
2758         return qdio_activate(CARD_DDEV(card));
2759 }
2760
2761 static int qeth_dm_act(struct qeth_card *card)
2762 {
2763         struct qeth_cmd_buffer *iob;
2764
2765         QETH_CARD_TEXT(card, 2, "dmact");
2766
2767         iob = qeth_mpc_alloc_cmd(card, DM_ACT, DM_ACT_SIZE);
2768         if (!iob)
2769                 return -ENOMEM;
2770
2771         memcpy(QETH_DM_ACT_DEST_ADDR(iob->data),
2772                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2773         memcpy(QETH_DM_ACT_CONNECTION_TOKEN(iob->data),
2774                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2775         return qeth_send_control_data(card, iob, NULL, NULL);
2776 }
2777
2778 static int qeth_mpc_initialize(struct qeth_card *card)
2779 {
2780         int rc;
2781
2782         QETH_CARD_TEXT(card, 2, "mpcinit");
2783
2784         rc = qeth_issue_next_read(card);
2785         if (rc) {
2786                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
2787                 return rc;
2788         }
2789         rc = qeth_cm_enable(card);
2790         if (rc) {
2791                 QETH_CARD_TEXT_(card, 2, "2err%d", rc);
2792                 return rc;
2793         }
2794         rc = qeth_cm_setup(card);
2795         if (rc) {
2796                 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
2797                 return rc;
2798         }
2799         rc = qeth_ulp_enable(card);
2800         if (rc) {
2801                 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
2802                 return rc;
2803         }
2804         rc = qeth_ulp_setup(card);
2805         if (rc) {
2806                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2807                 return rc;
2808         }
2809         rc = qeth_alloc_qdio_queues(card);
2810         if (rc) {
2811                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2812                 return rc;
2813         }
2814         rc = qeth_qdio_establish(card);
2815         if (rc) {
2816                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
2817                 qeth_free_qdio_queues(card);
2818                 return rc;
2819         }
2820         rc = qeth_qdio_activate(card);
2821         if (rc) {
2822                 QETH_CARD_TEXT_(card, 2, "7err%d", rc);
2823                 return rc;
2824         }
2825         rc = qeth_dm_act(card);
2826         if (rc) {
2827                 QETH_CARD_TEXT_(card, 2, "8err%d", rc);
2828                 return rc;
2829         }
2830
2831         return 0;
2832 }
2833
2834 static void qeth_print_status_message(struct qeth_card *card)
2835 {
2836         switch (card->info.type) {
2837         case QETH_CARD_TYPE_OSD:
2838         case QETH_CARD_TYPE_OSM:
2839         case QETH_CARD_TYPE_OSX:
2840                 /* VM will use a non-zero first character
2841                  * to indicate a HiperSockets like reporting
2842                  * of the level OSA sets the first character to zero
2843                  * */
2844                 if (!card->info.mcl_level[0]) {
2845                         sprintf(card->info.mcl_level, "%02x%02x",
2846                                 card->info.mcl_level[2],
2847                                 card->info.mcl_level[3]);
2848                         break;
2849                 }
2850                 fallthrough;
2851         case QETH_CARD_TYPE_IQD:
2852                 if (IS_VM_NIC(card) || (card->info.mcl_level[0] & 0x80)) {
2853                         card->info.mcl_level[0] = (char) _ebcasc[(__u8)
2854                                 card->info.mcl_level[0]];
2855                         card->info.mcl_level[1] = (char) _ebcasc[(__u8)
2856                                 card->info.mcl_level[1]];
2857                         card->info.mcl_level[2] = (char) _ebcasc[(__u8)
2858                                 card->info.mcl_level[2]];
2859                         card->info.mcl_level[3] = (char) _ebcasc[(__u8)
2860                                 card->info.mcl_level[3]];
2861                         card->info.mcl_level[QETH_MCL_LENGTH] = 0;
2862                 }
2863                 break;
2864         default:
2865                 memset(&card->info.mcl_level[0], 0, QETH_MCL_LENGTH + 1);
2866         }
2867         dev_info(&card->gdev->dev,
2868                  "Device is a%s card%s%s%s\nwith link type %s.\n",
2869                  qeth_get_cardname(card),
2870                  (card->info.mcl_level[0]) ? " (level: " : "",
2871                  (card->info.mcl_level[0]) ? card->info.mcl_level : "",
2872                  (card->info.mcl_level[0]) ? ")" : "",
2873                  qeth_get_cardname_short(card));
2874 }
2875
2876 static void qeth_initialize_working_pool_list(struct qeth_card *card)
2877 {
2878         struct qeth_buffer_pool_entry *entry;
2879
2880         QETH_CARD_TEXT(card, 5, "inwrklst");
2881
2882         list_for_each_entry(entry,
2883                             &card->qdio.init_pool.entry_list, init_list) {
2884                 qeth_put_buffer_pool_entry(card, entry);
2885         }
2886 }
2887
2888 static struct qeth_buffer_pool_entry *qeth_find_free_buffer_pool_entry(
2889                                         struct qeth_card *card)
2890 {
2891         struct qeth_buffer_pool_entry *entry;
2892         int i, free;
2893
2894         if (list_empty(&card->qdio.in_buf_pool.entry_list))
2895                 return NULL;
2896
2897         list_for_each_entry(entry, &card->qdio.in_buf_pool.entry_list, list) {
2898                 free = 1;
2899                 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2900                         if (page_count(entry->elements[i]) > 1) {
2901                                 free = 0;
2902                                 break;
2903                         }
2904                 }
2905                 if (free) {
2906                         list_del_init(&entry->list);
2907                         return entry;
2908                 }
2909         }
2910
2911         /* no free buffer in pool so take first one and swap pages */
2912         entry = list_first_entry(&card->qdio.in_buf_pool.entry_list,
2913                                  struct qeth_buffer_pool_entry, list);
2914         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2915                 if (page_count(entry->elements[i]) > 1) {
2916                         struct page *page = dev_alloc_page();
2917
2918                         if (!page)
2919                                 return NULL;
2920
2921                         __free_page(entry->elements[i]);
2922                         entry->elements[i] = page;
2923                         QETH_CARD_STAT_INC(card, rx_sg_alloc_page);
2924                 }
2925         }
2926         list_del_init(&entry->list);
2927         return entry;
2928 }
2929
2930 static int qeth_init_input_buffer(struct qeth_card *card,
2931                 struct qeth_qdio_buffer *buf)
2932 {
2933         struct qeth_buffer_pool_entry *pool_entry = buf->pool_entry;
2934         int i;
2935
2936         if ((card->options.cq == QETH_CQ_ENABLED) && (!buf->rx_skb)) {
2937                 buf->rx_skb = netdev_alloc_skb(card->dev,
2938                                                ETH_HLEN +
2939                                                sizeof(struct ipv6hdr));
2940                 if (!buf->rx_skb)
2941                         return -ENOMEM;
2942         }
2943
2944         if (!pool_entry) {
2945                 pool_entry = qeth_find_free_buffer_pool_entry(card);
2946                 if (!pool_entry)
2947                         return -ENOBUFS;
2948
2949                 buf->pool_entry = pool_entry;
2950         }
2951
2952         /*
2953          * since the buffer is accessed only from the input_tasklet
2954          * there shouldn't be a need to synchronize; also, since we use
2955          * the QETH_IN_BUF_REQUEUE_THRESHOLD we should never run  out off
2956          * buffers
2957          */
2958         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2959                 buf->buffer->element[i].length = PAGE_SIZE;
2960                 buf->buffer->element[i].addr =
2961                         page_to_phys(pool_entry->elements[i]);
2962                 if (i == QETH_MAX_BUFFER_ELEMENTS(card) - 1)
2963                         buf->buffer->element[i].eflags = SBAL_EFLAGS_LAST_ENTRY;
2964                 else
2965                         buf->buffer->element[i].eflags = 0;
2966                 buf->buffer->element[i].sflags = 0;
2967         }
2968         return 0;
2969 }
2970
2971 static unsigned int qeth_tx_select_bulk_max(struct qeth_card *card,
2972                                             struct qeth_qdio_out_q *queue)
2973 {
2974         if (!IS_IQD(card) ||
2975             qeth_iqd_is_mcast_queue(card, queue) ||
2976             card->options.cq == QETH_CQ_ENABLED ||
2977             qdio_get_ssqd_desc(CARD_DDEV(card), &card->ssqd))
2978                 return 1;
2979
2980         return card->ssqd.mmwc ? card->ssqd.mmwc : 1;
2981 }
2982
2983 static int qeth_init_qdio_queues(struct qeth_card *card)
2984 {
2985         unsigned int rx_bufs = card->qdio.in_buf_pool.buf_count;
2986         unsigned int i;
2987         int rc;
2988
2989         QETH_CARD_TEXT(card, 2, "initqdqs");
2990
2991         /* inbound queue */
2992         qdio_reset_buffers(card->qdio.in_q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2993         memset(&card->rx, 0, sizeof(struct qeth_rx));
2994
2995         qeth_initialize_working_pool_list(card);
2996         /*give only as many buffers to hardware as we have buffer pool entries*/
2997         for (i = 0; i < rx_bufs; i++) {
2998                 rc = qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]);
2999                 if (rc)
3000                         return rc;
3001         }
3002
3003         card->qdio.in_q->next_buf_to_init = QDIO_BUFNR(rx_bufs);
3004         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0, 0, rx_bufs,
3005                      NULL);
3006         if (rc) {
3007                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
3008                 return rc;
3009         }
3010
3011         /* completion */
3012         rc = qeth_cq_init(card);
3013         if (rc) {
3014                 return rc;
3015         }
3016
3017         /* outbound queue */
3018         for (i = 0; i < card->qdio.no_out_queues; ++i) {
3019                 struct qeth_qdio_out_q *queue = card->qdio.out_qs[i];
3020
3021                 qdio_reset_buffers(queue->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
3022                 queue->max_elements = QETH_MAX_BUFFER_ELEMENTS(card);
3023                 queue->next_buf_to_fill = 0;
3024                 queue->do_pack = 0;
3025                 queue->prev_hdr = NULL;
3026                 queue->coalesced_frames = 0;
3027                 queue->bulk_start = 0;
3028                 queue->bulk_count = 0;
3029                 queue->bulk_max = qeth_tx_select_bulk_max(card, queue);
3030                 atomic_set(&queue->used_buffers, 0);
3031                 atomic_set(&queue->set_pci_flags_count, 0);
3032                 netdev_tx_reset_queue(netdev_get_tx_queue(card->dev, i));
3033         }
3034         return 0;
3035 }
3036
3037 static void qeth_ipa_finalize_cmd(struct qeth_card *card,
3038                                   struct qeth_cmd_buffer *iob)
3039 {
3040         qeth_mpc_finalize_cmd(card, iob);
3041
3042         /* override with IPA-specific values: */
3043         __ipa_cmd(iob)->hdr.seqno = card->seqno.ipa++;
3044 }
3045
3046 void qeth_prepare_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
3047                           u16 cmd_length,
3048                           bool (*match)(struct qeth_cmd_buffer *iob,
3049                                         struct qeth_cmd_buffer *reply))
3050 {
3051         u8 prot_type = qeth_mpc_select_prot_type(card);
3052         u16 total_length = iob->length;
3053
3054         qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, total_length,
3055                        iob->data);
3056         iob->finalize = qeth_ipa_finalize_cmd;
3057         iob->match = match;
3058
3059         memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
3060         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &total_length, 2);
3061         memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1);
3062         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &cmd_length, 2);
3063         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &cmd_length, 2);
3064         memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
3065                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
3066         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &cmd_length, 2);
3067 }
3068 EXPORT_SYMBOL_GPL(qeth_prepare_ipa_cmd);
3069
3070 static bool qeth_ipa_match_reply(struct qeth_cmd_buffer *iob,
3071                                  struct qeth_cmd_buffer *reply)
3072 {
3073         struct qeth_ipa_cmd *ipa_reply = __ipa_reply(reply);
3074
3075         return ipa_reply && (__ipa_cmd(iob)->hdr.seqno == ipa_reply->hdr.seqno);
3076 }
3077
3078 struct qeth_cmd_buffer *qeth_ipa_alloc_cmd(struct qeth_card *card,
3079                                            enum qeth_ipa_cmds cmd_code,
3080                                            enum qeth_prot_versions prot,
3081                                            unsigned int data_length)
3082 {
3083         struct qeth_cmd_buffer *iob;
3084         struct qeth_ipacmd_hdr *hdr;
3085
3086         data_length += offsetof(struct qeth_ipa_cmd, data);
3087         iob = qeth_alloc_cmd(&card->write, IPA_PDU_HEADER_SIZE + data_length, 1,
3088                              QETH_IPA_TIMEOUT);
3089         if (!iob)
3090                 return NULL;
3091
3092         qeth_prepare_ipa_cmd(card, iob, data_length, qeth_ipa_match_reply);
3093
3094         hdr = &__ipa_cmd(iob)->hdr;
3095         hdr->command = cmd_code;
3096         hdr->initiator = IPA_CMD_INITIATOR_HOST;
3097         /* hdr->seqno is set by qeth_send_control_data() */
3098         hdr->adapter_type = QETH_LINK_TYPE_FAST_ETH;
3099         hdr->rel_adapter_no = (u8) card->dev->dev_port;
3100         hdr->prim_version_no = IS_LAYER2(card) ? 2 : 1;
3101         hdr->param_count = 1;
3102         hdr->prot_version = prot;
3103         return iob;
3104 }
3105 EXPORT_SYMBOL_GPL(qeth_ipa_alloc_cmd);
3106
3107 static int qeth_send_ipa_cmd_cb(struct qeth_card *card,
3108                                 struct qeth_reply *reply, unsigned long data)
3109 {
3110         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3111
3112         return (cmd->hdr.return_code) ? -EIO : 0;
3113 }
3114
3115 /**
3116  * qeth_send_ipa_cmd() - send an IPA command
3117  *
3118  * See qeth_send_control_data() for explanation of the arguments.
3119  */
3120
3121 int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
3122                 int (*reply_cb)(struct qeth_card *, struct qeth_reply*,
3123                         unsigned long),
3124                 void *reply_param)
3125 {
3126         int rc;
3127
3128         QETH_CARD_TEXT(card, 4, "sendipa");
3129
3130         if (card->read_or_write_problem) {
3131                 qeth_put_cmd(iob);
3132                 return -EIO;
3133         }
3134
3135         if (reply_cb == NULL)
3136                 reply_cb = qeth_send_ipa_cmd_cb;
3137         rc = qeth_send_control_data(card, iob, reply_cb, reply_param);
3138         if (rc == -ETIME) {
3139                 qeth_clear_ipacmd_list(card);
3140                 qeth_schedule_recovery(card);
3141         }
3142         return rc;
3143 }
3144 EXPORT_SYMBOL_GPL(qeth_send_ipa_cmd);
3145
3146 static int qeth_send_startlan_cb(struct qeth_card *card,
3147                                  struct qeth_reply *reply, unsigned long data)
3148 {
3149         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3150
3151         if (cmd->hdr.return_code == IPA_RC_LAN_OFFLINE)
3152                 return -ENETDOWN;
3153
3154         return (cmd->hdr.return_code) ? -EIO : 0;
3155 }
3156
3157 static int qeth_send_startlan(struct qeth_card *card)
3158 {
3159         struct qeth_cmd_buffer *iob;
3160
3161         QETH_CARD_TEXT(card, 2, "strtlan");
3162
3163         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_STARTLAN, QETH_PROT_NONE, 0);
3164         if (!iob)
3165                 return -ENOMEM;
3166         return qeth_send_ipa_cmd(card, iob, qeth_send_startlan_cb, NULL);
3167 }
3168
3169 static int qeth_setadpparms_inspect_rc(struct qeth_ipa_cmd *cmd)
3170 {
3171         if (!cmd->hdr.return_code)
3172                 cmd->hdr.return_code =
3173                         cmd->data.setadapterparms.hdr.return_code;
3174         return cmd->hdr.return_code;
3175 }
3176
3177 static int qeth_query_setadapterparms_cb(struct qeth_card *card,
3178                 struct qeth_reply *reply, unsigned long data)
3179 {
3180         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3181         struct qeth_query_cmds_supp *query_cmd;
3182
3183         QETH_CARD_TEXT(card, 3, "quyadpcb");
3184         if (qeth_setadpparms_inspect_rc(cmd))
3185                 return -EIO;
3186
3187         query_cmd = &cmd->data.setadapterparms.data.query_cmds_supp;
3188         if (query_cmd->lan_type & 0x7f) {
3189                 if (!qeth_is_supported_link_type(card, query_cmd->lan_type))
3190                         return -EPROTONOSUPPORT;
3191
3192                 card->info.link_type = query_cmd->lan_type;
3193                 QETH_CARD_TEXT_(card, 2, "lnk %d", card->info.link_type);
3194         }
3195
3196         card->options.adp.supported = query_cmd->supported_cmds;
3197         return 0;
3198 }
3199
3200 static struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card,
3201                                                     enum qeth_ipa_setadp_cmd adp_cmd,
3202                                                     unsigned int data_length)
3203 {
3204         struct qeth_ipacmd_setadpparms_hdr *hdr;
3205         struct qeth_cmd_buffer *iob;
3206
3207         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETADAPTERPARMS, QETH_PROT_IPV4,
3208                                  data_length +
3209                                  offsetof(struct qeth_ipacmd_setadpparms,
3210                                           data));
3211         if (!iob)
3212                 return NULL;
3213
3214         hdr = &__ipa_cmd(iob)->data.setadapterparms.hdr;
3215         hdr->cmdlength = sizeof(*hdr) + data_length;
3216         hdr->command_code = adp_cmd;
3217         hdr->used_total = 1;
3218         hdr->seq_no = 1;
3219         return iob;
3220 }
3221
3222 static int qeth_query_setadapterparms(struct qeth_card *card)
3223 {
3224         int rc;
3225         struct qeth_cmd_buffer *iob;
3226
3227         QETH_CARD_TEXT(card, 3, "queryadp");
3228         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_COMMANDS_SUPPORTED,
3229                                    SETADP_DATA_SIZEOF(query_cmds_supp));
3230         if (!iob)
3231                 return -ENOMEM;
3232         rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL);
3233         return rc;
3234 }
3235
3236 static int qeth_query_ipassists_cb(struct qeth_card *card,
3237                 struct qeth_reply *reply, unsigned long data)
3238 {
3239         struct qeth_ipa_cmd *cmd;
3240
3241         QETH_CARD_TEXT(card, 2, "qipasscb");
3242
3243         cmd = (struct qeth_ipa_cmd *) data;
3244
3245         switch (cmd->hdr.return_code) {
3246         case IPA_RC_SUCCESS:
3247                 break;
3248         case IPA_RC_NOTSUPP:
3249         case IPA_RC_L2_UNSUPPORTED_CMD:
3250                 QETH_CARD_TEXT(card, 2, "ipaunsup");
3251                 card->options.ipa4.supported |= IPA_SETADAPTERPARMS;
3252                 card->options.ipa6.supported |= IPA_SETADAPTERPARMS;
3253                 return -EOPNOTSUPP;
3254         default:
3255                 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Unhandled rc=%#x\n",
3256                                  CARD_DEVID(card), cmd->hdr.return_code);
3257                 return -EIO;
3258         }
3259
3260         if (cmd->hdr.prot_version == QETH_PROT_IPV4)
3261                 card->options.ipa4 = cmd->hdr.assists;
3262         else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
3263                 card->options.ipa6 = cmd->hdr.assists;
3264         else
3265                 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Flawed LIC detected\n",
3266                                  CARD_DEVID(card));
3267         return 0;
3268 }
3269
3270 static int qeth_query_ipassists(struct qeth_card *card,
3271                                 enum qeth_prot_versions prot)
3272 {
3273         int rc;
3274         struct qeth_cmd_buffer *iob;
3275
3276         QETH_CARD_TEXT_(card, 2, "qipassi%i", prot);
3277         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_QIPASSIST, prot, 0);
3278         if (!iob)
3279                 return -ENOMEM;
3280         rc = qeth_send_ipa_cmd(card, iob, qeth_query_ipassists_cb, NULL);
3281         return rc;
3282 }
3283
3284 static int qeth_query_switch_attributes_cb(struct qeth_card *card,
3285                                 struct qeth_reply *reply, unsigned long data)
3286 {
3287         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3288         struct qeth_query_switch_attributes *attrs;
3289         struct qeth_switch_info *sw_info;
3290
3291         QETH_CARD_TEXT(card, 2, "qswiatcb");
3292         if (qeth_setadpparms_inspect_rc(cmd))
3293                 return -EIO;
3294
3295         sw_info = (struct qeth_switch_info *)reply->param;
3296         attrs = &cmd->data.setadapterparms.data.query_switch_attributes;
3297         sw_info->capabilities = attrs->capabilities;
3298         sw_info->settings = attrs->settings;
3299         QETH_CARD_TEXT_(card, 2, "%04x%04x", sw_info->capabilities,
3300                         sw_info->settings);
3301         return 0;
3302 }
3303
3304 int qeth_query_switch_attributes(struct qeth_card *card,
3305                                  struct qeth_switch_info *sw_info)
3306 {
3307         struct qeth_cmd_buffer *iob;
3308
3309         QETH_CARD_TEXT(card, 2, "qswiattr");
3310         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES))
3311                 return -EOPNOTSUPP;
3312         if (!netif_carrier_ok(card->dev))
3313                 return -ENOMEDIUM;
3314         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES, 0);
3315         if (!iob)
3316                 return -ENOMEM;
3317         return qeth_send_ipa_cmd(card, iob,
3318                                 qeth_query_switch_attributes_cb, sw_info);
3319 }
3320
3321 struct qeth_cmd_buffer *qeth_get_diag_cmd(struct qeth_card *card,
3322                                           enum qeth_diags_cmds sub_cmd,
3323                                           unsigned int data_length)
3324 {
3325         struct qeth_ipacmd_diagass *cmd;
3326         struct qeth_cmd_buffer *iob;
3327
3328         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SET_DIAG_ASS, QETH_PROT_NONE,
3329                                  DIAG_HDR_LEN + data_length);
3330         if (!iob)
3331                 return NULL;
3332
3333         cmd = &__ipa_cmd(iob)->data.diagass;
3334         cmd->subcmd_len = DIAG_SUB_HDR_LEN + data_length;
3335         cmd->subcmd = sub_cmd;
3336         return iob;
3337 }
3338 EXPORT_SYMBOL_GPL(qeth_get_diag_cmd);
3339
3340 static int qeth_query_setdiagass_cb(struct qeth_card *card,
3341                 struct qeth_reply *reply, unsigned long data)
3342 {
3343         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3344         u16 rc = cmd->hdr.return_code;
3345
3346         if (rc) {
3347                 QETH_CARD_TEXT_(card, 2, "diagq:%x", rc);
3348                 return -EIO;
3349         }
3350
3351         card->info.diagass_support = cmd->data.diagass.ext;
3352         return 0;
3353 }
3354
3355 static int qeth_query_setdiagass(struct qeth_card *card)
3356 {
3357         struct qeth_cmd_buffer *iob;
3358
3359         QETH_CARD_TEXT(card, 2, "qdiagass");
3360         iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_QUERY, 0);
3361         if (!iob)
3362                 return -ENOMEM;
3363         return qeth_send_ipa_cmd(card, iob, qeth_query_setdiagass_cb, NULL);
3364 }
3365
3366 static void qeth_get_trap_id(struct qeth_card *card, struct qeth_trap_id *tid)
3367 {
3368         unsigned long info = get_zeroed_page(GFP_KERNEL);
3369         struct sysinfo_2_2_2 *info222 = (struct sysinfo_2_2_2 *)info;
3370         struct sysinfo_3_2_2 *info322 = (struct sysinfo_3_2_2 *)info;
3371         struct ccw_dev_id ccwid;
3372         int level;
3373
3374         tid->chpid = card->info.chpid;
3375         ccw_device_get_id(CARD_RDEV(card), &ccwid);
3376         tid->ssid = ccwid.ssid;
3377         tid->devno = ccwid.devno;
3378         if (!info)
3379                 return;
3380         level = stsi(NULL, 0, 0, 0);
3381         if ((level >= 2) && (stsi(info222, 2, 2, 2) == 0))
3382                 tid->lparnr = info222->lpar_number;
3383         if ((level >= 3) && (stsi(info322, 3, 2, 2) == 0)) {
3384                 EBCASC(info322->vm[0].name, sizeof(info322->vm[0].name));
3385                 memcpy(tid->vmname, info322->vm[0].name, sizeof(tid->vmname));
3386         }
3387         free_page(info);
3388 }
3389
3390 static int qeth_hw_trap_cb(struct qeth_card *card,
3391                 struct qeth_reply *reply, unsigned long data)
3392 {
3393         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3394         u16 rc = cmd->hdr.return_code;
3395
3396         if (rc) {
3397                 QETH_CARD_TEXT_(card, 2, "trapc:%x", rc);
3398                 return -EIO;
3399         }
3400         return 0;
3401 }
3402
3403 int qeth_hw_trap(struct qeth_card *card, enum qeth_diags_trap_action action)
3404 {
3405         struct qeth_cmd_buffer *iob;
3406         struct qeth_ipa_cmd *cmd;
3407
3408         QETH_CARD_TEXT(card, 2, "diagtrap");
3409         iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_TRAP, 64);
3410         if (!iob)
3411                 return -ENOMEM;
3412         cmd = __ipa_cmd(iob);
3413         cmd->data.diagass.type = 1;
3414         cmd->data.diagass.action = action;
3415         switch (action) {
3416         case QETH_DIAGS_TRAP_ARM:
3417                 cmd->data.diagass.options = 0x0003;
3418                 cmd->data.diagass.ext = 0x00010000 +
3419                         sizeof(struct qeth_trap_id);
3420                 qeth_get_trap_id(card,
3421                         (struct qeth_trap_id *)cmd->data.diagass.cdata);
3422                 break;
3423         case QETH_DIAGS_TRAP_DISARM:
3424                 cmd->data.diagass.options = 0x0001;
3425                 break;
3426         case QETH_DIAGS_TRAP_CAPTURE:
3427                 break;
3428         }
3429         return qeth_send_ipa_cmd(card, iob, qeth_hw_trap_cb, NULL);
3430 }
3431
3432 static int qeth_check_qdio_errors(struct qeth_card *card,
3433                                   struct qdio_buffer *buf,
3434                                   unsigned int qdio_error,
3435                                   const char *dbftext)
3436 {
3437         if (qdio_error) {
3438                 QETH_CARD_TEXT(card, 2, dbftext);
3439                 QETH_CARD_TEXT_(card, 2, " F15=%02X",
3440                                buf->element[15].sflags);
3441                 QETH_CARD_TEXT_(card, 2, " F14=%02X",
3442                                buf->element[14].sflags);
3443                 QETH_CARD_TEXT_(card, 2, " qerr=%X", qdio_error);
3444                 if ((buf->element[15].sflags) == 0x12) {
3445                         QETH_CARD_STAT_INC(card, rx_fifo_errors);
3446                         return 0;
3447                 } else
3448                         return 1;
3449         }
3450         return 0;
3451 }
3452
3453 static unsigned int qeth_rx_refill_queue(struct qeth_card *card,
3454                                          unsigned int count)
3455 {
3456         struct qeth_qdio_q *queue = card->qdio.in_q;
3457         struct list_head *lh;
3458         int i;
3459         int rc;
3460         int newcount = 0;
3461
3462         /* only requeue at a certain threshold to avoid SIGAs */
3463         if (count >= QETH_IN_BUF_REQUEUE_THRESHOLD(card)) {
3464                 for (i = queue->next_buf_to_init;
3465                      i < queue->next_buf_to_init + count; ++i) {
3466                         if (qeth_init_input_buffer(card,
3467                                 &queue->bufs[QDIO_BUFNR(i)])) {
3468                                 break;
3469                         } else {
3470                                 newcount++;
3471                         }
3472                 }
3473
3474                 if (newcount < count) {
3475                         /* we are in memory shortage so we switch back to
3476                            traditional skb allocation and drop packages */
3477                         atomic_set(&card->force_alloc_skb, 3);
3478                         count = newcount;
3479                 } else {
3480                         atomic_add_unless(&card->force_alloc_skb, -1, 0);
3481                 }
3482
3483                 if (!count) {
3484                         i = 0;
3485                         list_for_each(lh, &card->qdio.in_buf_pool.entry_list)
3486                                 i++;
3487                         if (i == card->qdio.in_buf_pool.buf_count) {
3488                                 QETH_CARD_TEXT(card, 2, "qsarbw");
3489                                 schedule_delayed_work(
3490                                         &card->buffer_reclaim_work,
3491                                         QETH_RECLAIM_WORK_TIME);
3492                         }
3493                         return 0;
3494                 }
3495
3496                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0,
3497                              queue->next_buf_to_init, count, NULL);
3498                 if (rc) {
3499                         QETH_CARD_TEXT(card, 2, "qinberr");
3500                 }
3501                 queue->next_buf_to_init = QDIO_BUFNR(queue->next_buf_to_init +
3502                                                      count);
3503                 return count;
3504         }
3505
3506         return 0;
3507 }
3508
3509 static void qeth_buffer_reclaim_work(struct work_struct *work)
3510 {
3511         struct qeth_card *card = container_of(to_delayed_work(work),
3512                                               struct qeth_card,
3513                                               buffer_reclaim_work);
3514
3515         local_bh_disable();
3516         napi_schedule(&card->napi);
3517         /* kick-start the NAPI softirq: */
3518         local_bh_enable();
3519 }
3520
3521 static void qeth_handle_send_error(struct qeth_card *card,
3522                 struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err)
3523 {
3524         int sbalf15 = buffer->buffer->element[15].sflags;
3525
3526         QETH_CARD_TEXT(card, 6, "hdsnderr");
3527         qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr");
3528
3529         if (!qdio_err)
3530                 return;
3531
3532         if ((sbalf15 >= 15) && (sbalf15 <= 31))
3533                 return;
3534
3535         QETH_CARD_TEXT(card, 1, "lnkfail");
3536         QETH_CARD_TEXT_(card, 1, "%04x %02x",
3537                        (u16)qdio_err, (u8)sbalf15);
3538 }
3539
3540 /**
3541  * qeth_prep_flush_pack_buffer - Prepares flushing of a packing buffer.
3542  * @queue: queue to check for packing buffer
3543  *
3544  * Returns number of buffers that were prepared for flush.
3545  */
3546 static int qeth_prep_flush_pack_buffer(struct qeth_qdio_out_q *queue)
3547 {
3548         struct qeth_qdio_out_buffer *buffer;
3549
3550         buffer = queue->bufs[queue->next_buf_to_fill];
3551         if ((atomic_read(&buffer->state) == QETH_QDIO_BUF_EMPTY) &&
3552             (buffer->next_element_to_fill > 0)) {
3553                 /* it's a packing buffer */
3554                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3555                 queue->next_buf_to_fill =
3556                         QDIO_BUFNR(queue->next_buf_to_fill + 1);
3557                 return 1;
3558         }
3559         return 0;
3560 }
3561
3562 /*
3563  * Switched to packing state if the number of used buffers on a queue
3564  * reaches a certain limit.
3565  */
3566 static void qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q *queue)
3567 {
3568         if (!queue->do_pack) {
3569                 if (atomic_read(&queue->used_buffers)
3570                     >= QETH_HIGH_WATERMARK_PACK){
3571                         /* switch non-PACKING -> PACKING */
3572                         QETH_CARD_TEXT(queue->card, 6, "np->pack");
3573                         QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3574                         queue->do_pack = 1;
3575                 }
3576         }
3577 }
3578
3579 /*
3580  * Switches from packing to non-packing mode. If there is a packing
3581  * buffer on the queue this buffer will be prepared to be flushed.
3582  * In that case 1 is returned to inform the caller. If no buffer
3583  * has to be flushed, zero is returned.
3584  */
3585 static int qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q *queue)
3586 {
3587         if (queue->do_pack) {
3588                 if (atomic_read(&queue->used_buffers)
3589                     <= QETH_LOW_WATERMARK_PACK) {
3590                         /* switch PACKING -> non-PACKING */
3591                         QETH_CARD_TEXT(queue->card, 6, "pack->np");
3592                         QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3593                         queue->do_pack = 0;
3594                         return qeth_prep_flush_pack_buffer(queue);
3595                 }
3596         }
3597         return 0;
3598 }
3599
3600 static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
3601                                int count)
3602 {
3603         struct qeth_qdio_out_buffer *buf = queue->bufs[index];
3604         unsigned int qdio_flags = QDIO_FLAG_SYNC_OUTPUT;
3605         struct qeth_card *card = queue->card;
3606         struct qaob *aob = NULL;
3607         int rc;
3608         int i;
3609
3610         for (i = index; i < index + count; ++i) {
3611                 unsigned int bidx = QDIO_BUFNR(i);
3612                 struct sk_buff *skb;
3613
3614                 buf = queue->bufs[bidx];
3615                 buf->buffer->element[buf->next_element_to_fill - 1].eflags |=
3616                                 SBAL_EFLAGS_LAST_ENTRY;
3617                 queue->coalesced_frames += buf->frames;
3618
3619                 if (IS_IQD(card)) {
3620                         skb_queue_walk(&buf->skb_list, skb)
3621                                 skb_tx_timestamp(skb);
3622                 }
3623         }
3624
3625         if (IS_IQD(card)) {
3626                 if (card->options.cq == QETH_CQ_ENABLED &&
3627                     !qeth_iqd_is_mcast_queue(card, queue) &&
3628                     count == 1) {
3629                         if (!buf->aob)
3630                                 buf->aob = qdio_allocate_aob();
3631                         if (buf->aob) {
3632                                 aob = buf->aob;
3633                                 aob->user1 = (u64) buf;
3634                         }
3635                 }
3636         } else {
3637                 if (!queue->do_pack) {
3638                         if ((atomic_read(&queue->used_buffers) >=
3639                                 (QETH_HIGH_WATERMARK_PACK -
3640                                  QETH_WATERMARK_PACK_FUZZ)) &&
3641                             !atomic_read(&queue->set_pci_flags_count)) {
3642                                 /* it's likely that we'll go to packing
3643                                  * mode soon */
3644                                 atomic_inc(&queue->set_pci_flags_count);
3645                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3646                         }
3647                 } else {
3648                         if (!atomic_read(&queue->set_pci_flags_count)) {
3649                                 /*
3650                                  * there's no outstanding PCI any more, so we
3651                                  * have to request a PCI to be sure the the PCI
3652                                  * will wake at some time in the future then we
3653                                  * can flush packed buffers that might still be
3654                                  * hanging around, which can happen if no
3655                                  * further send was requested by the stack
3656                                  */
3657                                 atomic_inc(&queue->set_pci_flags_count);
3658                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3659                         }
3660                 }
3661
3662                 if (atomic_read(&queue->set_pci_flags_count))
3663                         qdio_flags |= QDIO_FLAG_PCI_OUT;
3664         }
3665
3666         QETH_TXQ_STAT_INC(queue, doorbell);
3667         rc = do_QDIO(CARD_DDEV(card), qdio_flags, queue->queue_no, index, count,
3668                      aob);
3669
3670         switch (rc) {
3671         case 0:
3672         case -ENOBUFS:
3673                 /* ignore temporary SIGA errors without busy condition */
3674
3675                 /* Fake the TX completion interrupt: */
3676                 if (IS_IQD(card)) {
3677                         unsigned int frames = READ_ONCE(queue->max_coalesced_frames);
3678                         unsigned int usecs = READ_ONCE(queue->coalesce_usecs);
3679
3680                         if (frames && queue->coalesced_frames >= frames) {
3681                                 napi_schedule(&queue->napi);
3682                                 queue->coalesced_frames = 0;
3683                                 QETH_TXQ_STAT_INC(queue, coal_frames);
3684                         } else if (usecs) {
3685                                 qeth_tx_arm_timer(queue, usecs);
3686                         }
3687                 }
3688
3689                 break;
3690         default:
3691                 QETH_CARD_TEXT(queue->card, 2, "flushbuf");
3692                 QETH_CARD_TEXT_(queue->card, 2, " q%d", queue->queue_no);
3693                 QETH_CARD_TEXT_(queue->card, 2, " idx%d", index);
3694                 QETH_CARD_TEXT_(queue->card, 2, " c%d", count);
3695                 QETH_CARD_TEXT_(queue->card, 2, " err%d", rc);
3696
3697                 /* this must not happen under normal circumstances. if it
3698                  * happens something is really wrong -> recover */
3699                 qeth_schedule_recovery(queue->card);
3700         }
3701 }
3702
3703 static void qeth_flush_queue(struct qeth_qdio_out_q *queue)
3704 {
3705         qeth_flush_buffers(queue, queue->bulk_start, queue->bulk_count);
3706
3707         queue->bulk_start = QDIO_BUFNR(queue->bulk_start + queue->bulk_count);
3708         queue->prev_hdr = NULL;
3709         queue->bulk_count = 0;
3710 }
3711
3712 static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue)
3713 {
3714         /*
3715          * check if weed have to switch to non-packing mode or if
3716          * we have to get a pci flag out on the queue
3717          */
3718         if ((atomic_read(&queue->used_buffers) <= QETH_LOW_WATERMARK_PACK) ||
3719             !atomic_read(&queue->set_pci_flags_count)) {
3720                 unsigned int index, flush_cnt;
3721                 bool q_was_packing;
3722
3723                 spin_lock(&queue->lock);
3724
3725                 index = queue->next_buf_to_fill;
3726                 q_was_packing = queue->do_pack;
3727
3728                 flush_cnt = qeth_switch_to_nonpacking_if_needed(queue);
3729                 if (!flush_cnt && !atomic_read(&queue->set_pci_flags_count))
3730                         flush_cnt = qeth_prep_flush_pack_buffer(queue);
3731
3732                 if (flush_cnt) {
3733                         qeth_flush_buffers(queue, index, flush_cnt);
3734                         if (q_was_packing)
3735                                 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_cnt);
3736                 }
3737
3738                 spin_unlock(&queue->lock);
3739         }
3740 }
3741
3742 static void qeth_qdio_poll(struct ccw_device *cdev, unsigned long card_ptr)
3743 {
3744         struct qeth_card *card = (struct qeth_card *)card_ptr;
3745
3746         napi_schedule_irqoff(&card->napi);
3747 }
3748
3749 int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq)
3750 {
3751         int rc;
3752
3753         if (card->options.cq ==  QETH_CQ_NOTAVAILABLE) {
3754                 rc = -1;
3755                 goto out;
3756         } else {
3757                 if (card->options.cq == cq) {
3758                         rc = 0;
3759                         goto out;
3760                 }
3761
3762                 qeth_free_qdio_queues(card);
3763                 card->options.cq = cq;
3764                 rc = 0;
3765         }
3766 out:
3767         return rc;
3768
3769 }
3770 EXPORT_SYMBOL_GPL(qeth_configure_cq);
3771
3772 static void qeth_qdio_cq_handler(struct qeth_card *card, unsigned int qdio_err,
3773                                  unsigned int queue, int first_element,
3774                                  int count)
3775 {
3776         struct qeth_qdio_q *cq = card->qdio.c_q;
3777         int i;
3778         int rc;
3779
3780         QETH_CARD_TEXT_(card, 5, "qcqhe%d", first_element);
3781         QETH_CARD_TEXT_(card, 5, "qcqhc%d", count);
3782         QETH_CARD_TEXT_(card, 5, "qcqherr%d", qdio_err);
3783
3784         if (qdio_err) {
3785                 netif_tx_stop_all_queues(card->dev);
3786                 qeth_schedule_recovery(card);
3787                 return;
3788         }
3789
3790         for (i = first_element; i < first_element + count; ++i) {
3791                 struct qdio_buffer *buffer = cq->qdio_bufs[QDIO_BUFNR(i)];
3792                 int e = 0;
3793
3794                 while ((e < QDIO_MAX_ELEMENTS_PER_BUFFER) &&
3795                        buffer->element[e].addr) {
3796                         unsigned long phys_aob_addr = buffer->element[e].addr;
3797
3798                         qeth_qdio_handle_aob(card, phys_aob_addr);
3799                         ++e;
3800                 }
3801                 qeth_scrub_qdio_buffer(buffer, QDIO_MAX_ELEMENTS_PER_BUFFER);
3802         }
3803         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, queue,
3804                      cq->next_buf_to_init, count, NULL);
3805         if (rc) {
3806                 dev_warn(&card->gdev->dev,
3807                         "QDIO reported an error, rc=%i\n", rc);
3808                 QETH_CARD_TEXT(card, 2, "qcqherr");
3809         }
3810
3811         cq->next_buf_to_init = QDIO_BUFNR(cq->next_buf_to_init + count);
3812 }
3813
3814 static void qeth_qdio_input_handler(struct ccw_device *ccwdev,
3815                                     unsigned int qdio_err, int queue,
3816                                     int first_elem, int count,
3817                                     unsigned long card_ptr)
3818 {
3819         struct qeth_card *card = (struct qeth_card *)card_ptr;
3820
3821         QETH_CARD_TEXT_(card, 2, "qihq%d", queue);
3822         QETH_CARD_TEXT_(card, 2, "qiec%d", qdio_err);
3823
3824         if (qdio_err)
3825                 qeth_schedule_recovery(card);
3826 }
3827
3828 static void qeth_qdio_output_handler(struct ccw_device *ccwdev,
3829                                      unsigned int qdio_error, int __queue,
3830                                      int first_element, int count,
3831                                      unsigned long card_ptr)
3832 {
3833         struct qeth_card *card        = (struct qeth_card *) card_ptr;
3834         struct qeth_qdio_out_q *queue = card->qdio.out_qs[__queue];
3835         struct net_device *dev = card->dev;
3836         struct netdev_queue *txq;
3837         int i;
3838
3839         QETH_CARD_TEXT(card, 6, "qdouhdl");
3840         if (qdio_error & QDIO_ERROR_FATAL) {
3841                 QETH_CARD_TEXT(card, 2, "achkcond");
3842                 netif_tx_stop_all_queues(dev);
3843                 qeth_schedule_recovery(card);
3844                 return;
3845         }
3846
3847         for (i = first_element; i < (first_element + count); ++i) {
3848                 struct qeth_qdio_out_buffer *buf = queue->bufs[QDIO_BUFNR(i)];
3849
3850                 qeth_handle_send_error(card, buf, qdio_error);
3851                 qeth_clear_output_buffer(queue, buf, qdio_error, 0);
3852         }
3853
3854         atomic_sub(count, &queue->used_buffers);
3855         qeth_check_outbound_queue(queue);
3856
3857         txq = netdev_get_tx_queue(dev, __queue);
3858         /* xmit may have observed the full-condition, but not yet stopped the
3859          * txq. In which case the code below won't trigger. So before returning,
3860          * xmit will re-check the txq's fill level and wake it up if needed.
3861          */
3862         if (netif_tx_queue_stopped(txq) && !qeth_out_queue_is_full(queue))
3863                 netif_tx_wake_queue(txq);
3864 }
3865
3866 /**
3867  * Note: Function assumes that we have 4 outbound queues.
3868  */
3869 int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb)
3870 {
3871         struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
3872         u8 tos;
3873
3874         switch (card->qdio.do_prio_queueing) {
3875         case QETH_PRIO_Q_ING_TOS:
3876         case QETH_PRIO_Q_ING_PREC:
3877                 switch (vlan_get_protocol(skb)) {
3878                 case htons(ETH_P_IP):
3879                         tos = ipv4_get_dsfield(ip_hdr(skb));
3880                         break;
3881                 case htons(ETH_P_IPV6):
3882                         tos = ipv6_get_dsfield(ipv6_hdr(skb));
3883                         break;
3884                 default:
3885                         return card->qdio.default_out_queue;
3886                 }
3887                 if (card->qdio.do_prio_queueing == QETH_PRIO_Q_ING_PREC)
3888                         return ~tos >> 6 & 3;
3889                 if (tos & IPTOS_MINCOST)
3890                         return 3;
3891                 if (tos & IPTOS_RELIABILITY)
3892                         return 2;
3893                 if (tos & IPTOS_THROUGHPUT)
3894                         return 1;
3895                 if (tos & IPTOS_LOWDELAY)
3896                         return 0;
3897                 break;
3898         case QETH_PRIO_Q_ING_SKB:
3899                 if (skb->priority > 5)
3900                         return 0;
3901                 return ~skb->priority >> 1 & 3;
3902         case QETH_PRIO_Q_ING_VLAN:
3903                 if (veth->h_vlan_proto == htons(ETH_P_8021Q))
3904                         return ~ntohs(veth->h_vlan_TCI) >>
3905                                (VLAN_PRIO_SHIFT + 1) & 3;
3906                 break;
3907         case QETH_PRIO_Q_ING_FIXED:
3908                 return card->qdio.default_out_queue;
3909         default:
3910                 break;
3911         }
3912         return card->qdio.default_out_queue;
3913 }
3914 EXPORT_SYMBOL_GPL(qeth_get_priority_queue);
3915
3916 /**
3917  * qeth_get_elements_for_frags() -      find number of SBALEs for skb frags.
3918  * @skb:                                SKB address
3919  *
3920  * Returns the number of pages, and thus QDIO buffer elements, needed to cover
3921  * fragmented part of the SKB. Returns zero for linear SKB.
3922  */
3923 static int qeth_get_elements_for_frags(struct sk_buff *skb)
3924 {
3925         int cnt, elements = 0;
3926
3927         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3928                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
3929
3930                 elements += qeth_get_elements_for_range(
3931                         (addr_t)skb_frag_address(frag),
3932                         (addr_t)skb_frag_address(frag) + skb_frag_size(frag));
3933         }
3934         return elements;
3935 }
3936
3937 /**
3938  * qeth_count_elements() -      Counts the number of QDIO buffer elements needed
3939  *                              to transmit an skb.
3940  * @skb:                        the skb to operate on.
3941  * @data_offset:                skip this part of the skb's linear data
3942  *
3943  * Returns the number of pages, and thus QDIO buffer elements, needed to map the
3944  * skb's data (both its linear part and paged fragments).
3945  */
3946 unsigned int qeth_count_elements(struct sk_buff *skb, unsigned int data_offset)
3947 {
3948         unsigned int elements = qeth_get_elements_for_frags(skb);
3949         addr_t end = (addr_t)skb->data + skb_headlen(skb);
3950         addr_t start = (addr_t)skb->data + data_offset;
3951
3952         if (start != end)
3953                 elements += qeth_get_elements_for_range(start, end);
3954         return elements;
3955 }
3956 EXPORT_SYMBOL_GPL(qeth_count_elements);
3957
3958 #define QETH_HDR_CACHE_OBJ_SIZE         (sizeof(struct qeth_hdr_tso) + \
3959                                          MAX_TCP_HEADER)
3960
3961 /**
3962  * qeth_add_hw_header() - add a HW header to an skb.
3963  * @skb: skb that the HW header should be added to.
3964  * @hdr: double pointer to a qeth_hdr. When returning with >= 0,
3965  *       it contains a valid pointer to a qeth_hdr.
3966  * @hdr_len: length of the HW header.
3967  * @proto_len: length of protocol headers that need to be in same page as the
3968  *             HW header.
3969  *
3970  * Returns the pushed length. If the header can't be pushed on
3971  * (eg. because it would cross a page boundary), it is allocated from
3972  * the cache instead and 0 is returned.
3973  * The number of needed buffer elements is returned in @elements.
3974  * Error to create the hdr is indicated by returning with < 0.
3975  */
3976 static int qeth_add_hw_header(struct qeth_qdio_out_q *queue,
3977                               struct sk_buff *skb, struct qeth_hdr **hdr,
3978                               unsigned int hdr_len, unsigned int proto_len,
3979                               unsigned int *elements)
3980 {
3981         gfp_t gfp = GFP_ATOMIC | (skb_pfmemalloc(skb) ? __GFP_MEMALLOC : 0);
3982         const unsigned int contiguous = proto_len ? proto_len : 1;
3983         const unsigned int max_elements = queue->max_elements;
3984         unsigned int __elements;
3985         addr_t start, end;
3986         bool push_ok;
3987         int rc;
3988
3989 check_layout:
3990         start = (addr_t)skb->data - hdr_len;
3991         end = (addr_t)skb->data;
3992
3993         if (qeth_get_elements_for_range(start, end + contiguous) == 1) {
3994                 /* Push HW header into same page as first protocol header. */
3995                 push_ok = true;
3996                 /* ... but TSO always needs a separate element for headers: */
3997                 if (skb_is_gso(skb))
3998                         __elements = 1 + qeth_count_elements(skb, proto_len);
3999                 else
4000                         __elements = qeth_count_elements(skb, 0);
4001         } else if (!proto_len && PAGE_ALIGNED(skb->data)) {
4002                 /* Push HW header into preceding page, flush with skb->data. */
4003                 push_ok = true;
4004                 __elements = 1 + qeth_count_elements(skb, 0);
4005         } else {
4006                 /* Use header cache, copy protocol headers up. */
4007                 push_ok = false;
4008                 __elements = 1 + qeth_count_elements(skb, proto_len);
4009         }
4010
4011         /* Compress skb to fit into one IO buffer: */
4012         if (__elements > max_elements) {
4013                 if (!skb_is_nonlinear(skb)) {
4014                         /* Drop it, no easy way of shrinking it further. */
4015                         QETH_DBF_MESSAGE(2, "Dropped an oversized skb (Max Elements=%u / Actual=%u / Length=%u).\n",
4016                                          max_elements, __elements, skb->len);
4017                         return -E2BIG;
4018                 }
4019
4020                 rc = skb_linearize(skb);
4021                 if (rc) {
4022                         QETH_TXQ_STAT_INC(queue, skbs_linearized_fail);
4023                         return rc;
4024                 }
4025
4026                 QETH_TXQ_STAT_INC(queue, skbs_linearized);
4027                 /* Linearization changed the layout, re-evaluate: */
4028                 goto check_layout;
4029         }
4030
4031         *elements = __elements;
4032         /* Add the header: */
4033         if (push_ok) {
4034                 *hdr = skb_push(skb, hdr_len);
4035                 return hdr_len;
4036         }
4037
4038         /* Fall back to cache element with known-good alignment: */
4039         if (hdr_len + proto_len > QETH_HDR_CACHE_OBJ_SIZE)
4040                 return -E2BIG;
4041         *hdr = kmem_cache_alloc(qeth_core_header_cache, gfp);
4042         if (!*hdr)
4043                 return -ENOMEM;
4044         /* Copy protocol headers behind HW header: */
4045         skb_copy_from_linear_data(skb, ((char *)*hdr) + hdr_len, proto_len);
4046         return 0;
4047 }
4048
4049 static bool qeth_iqd_may_bulk(struct qeth_qdio_out_q *queue,
4050                               struct sk_buff *curr_skb,
4051                               struct qeth_hdr *curr_hdr)
4052 {
4053         struct qeth_qdio_out_buffer *buffer = queue->bufs[queue->bulk_start];
4054         struct qeth_hdr *prev_hdr = queue->prev_hdr;
4055
4056         if (!prev_hdr)
4057                 return true;
4058
4059         /* All packets must have the same target: */
4060         if (curr_hdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER2) {
4061                 struct sk_buff *prev_skb = skb_peek(&buffer->skb_list);
4062
4063                 return ether_addr_equal(eth_hdr(prev_skb)->h_dest,
4064                                         eth_hdr(curr_skb)->h_dest) &&
4065                        qeth_l2_same_vlan(&prev_hdr->hdr.l2, &curr_hdr->hdr.l2);
4066         }
4067
4068         return qeth_l3_same_next_hop(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3) &&
4069                qeth_l3_iqd_same_vlan(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3);
4070 }
4071
4072 /**
4073  * qeth_fill_buffer() - map skb into an output buffer
4074  * @buf:        buffer to transport the skb
4075  * @skb:        skb to map into the buffer
4076  * @hdr:        qeth_hdr for this skb. Either at skb->data, or allocated
4077  *              from qeth_core_header_cache.
4078  * @offset:     when mapping the skb, start at skb->data + offset
4079  * @hd_len:     if > 0, build a dedicated header element of this size
4080  */
4081 static unsigned int qeth_fill_buffer(struct qeth_qdio_out_buffer *buf,
4082                                      struct sk_buff *skb, struct qeth_hdr *hdr,
4083                                      unsigned int offset, unsigned int hd_len)
4084 {
4085         struct qdio_buffer *buffer = buf->buffer;
4086         int element = buf->next_element_to_fill;
4087         int length = skb_headlen(skb) - offset;
4088         char *data = skb->data + offset;
4089         unsigned int elem_length, cnt;
4090         bool is_first_elem = true;
4091
4092         __skb_queue_tail(&buf->skb_list, skb);
4093
4094         /* build dedicated element for HW Header */
4095         if (hd_len) {
4096                 is_first_elem = false;
4097
4098                 buffer->element[element].addr = virt_to_phys(hdr);
4099                 buffer->element[element].length = hd_len;
4100                 buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
4101
4102                 /* HW header is allocated from cache: */
4103                 if ((void *)hdr != skb->data)
4104                         buf->is_header[element] = 1;
4105                 /* HW header was pushed and is contiguous with linear part: */
4106                 else if (length > 0 && !PAGE_ALIGNED(data) &&
4107                          (data == (char *)hdr + hd_len))
4108                         buffer->element[element].eflags |=
4109                                 SBAL_EFLAGS_CONTIGUOUS;
4110
4111                 element++;
4112         }
4113
4114         /* map linear part into buffer element(s) */
4115         while (length > 0) {
4116                 elem_length = min_t(unsigned int, length,
4117                                     PAGE_SIZE - offset_in_page(data));
4118
4119                 buffer->element[element].addr = virt_to_phys(data);
4120                 buffer->element[element].length = elem_length;
4121                 length -= elem_length;
4122                 if (is_first_elem) {
4123                         is_first_elem = false;
4124                         if (length || skb_is_nonlinear(skb))
4125                                 /* skb needs additional elements */
4126                                 buffer->element[element].eflags =
4127                                         SBAL_EFLAGS_FIRST_FRAG;
4128                         else
4129                                 buffer->element[element].eflags = 0;
4130                 } else {
4131                         buffer->element[element].eflags =
4132                                 SBAL_EFLAGS_MIDDLE_FRAG;
4133                 }
4134
4135                 data += elem_length;
4136                 element++;
4137         }
4138
4139         /* map page frags into buffer element(s) */
4140         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
4141                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
4142
4143                 data = skb_frag_address(frag);
4144                 length = skb_frag_size(frag);
4145                 while (length > 0) {
4146                         elem_length = min_t(unsigned int, length,
4147                                             PAGE_SIZE - offset_in_page(data));
4148
4149                         buffer->element[element].addr = virt_to_phys(data);
4150                         buffer->element[element].length = elem_length;
4151                         buffer->element[element].eflags =
4152                                 SBAL_EFLAGS_MIDDLE_FRAG;
4153
4154                         length -= elem_length;
4155                         data += elem_length;
4156                         element++;
4157                 }
4158         }
4159
4160         if (buffer->element[element - 1].eflags)
4161                 buffer->element[element - 1].eflags = SBAL_EFLAGS_LAST_FRAG;
4162         buf->next_element_to_fill = element;
4163         return element;
4164 }
4165
4166 static int __qeth_xmit(struct qeth_card *card, struct qeth_qdio_out_q *queue,
4167                        struct sk_buff *skb, unsigned int elements,
4168                        struct qeth_hdr *hdr, unsigned int offset,
4169                        unsigned int hd_len)
4170 {
4171         unsigned int bytes = qdisc_pkt_len(skb);
4172         struct qeth_qdio_out_buffer *buffer;
4173         unsigned int next_element;
4174         struct netdev_queue *txq;
4175         bool stopped = false;
4176         bool flush;
4177
4178         buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start + queue->bulk_count)];
4179         txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
4180
4181         /* Just a sanity check, the wake/stop logic should ensure that we always
4182          * get a free buffer.
4183          */
4184         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4185                 return -EBUSY;
4186
4187         flush = !qeth_iqd_may_bulk(queue, skb, hdr);
4188
4189         if (flush ||
4190             (buffer->next_element_to_fill + elements > queue->max_elements)) {
4191                 if (buffer->next_element_to_fill > 0) {
4192                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4193                         queue->bulk_count++;
4194                 }
4195
4196                 if (queue->bulk_count >= queue->bulk_max)
4197                         flush = true;
4198
4199                 if (flush)
4200                         qeth_flush_queue(queue);
4201
4202                 buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start +
4203                                                 queue->bulk_count)];
4204
4205                 /* Sanity-check again: */
4206                 if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4207                         return -EBUSY;
4208         }
4209
4210         if (buffer->next_element_to_fill == 0 &&
4211             atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
4212                 /* If a TX completion happens right _here_ and misses to wake
4213                  * the txq, then our re-check below will catch the race.
4214                  */
4215                 QETH_TXQ_STAT_INC(queue, stopped);
4216                 netif_tx_stop_queue(txq);
4217                 stopped = true;
4218         }
4219
4220         next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
4221         buffer->bytes += bytes;
4222         buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
4223         queue->prev_hdr = hdr;
4224
4225         flush = __netdev_tx_sent_queue(txq, bytes,
4226                                        !stopped && netdev_xmit_more());
4227
4228         if (flush || next_element >= queue->max_elements) {
4229                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4230                 queue->bulk_count++;
4231
4232                 if (queue->bulk_count >= queue->bulk_max)
4233                         flush = true;
4234
4235                 if (flush)
4236                         qeth_flush_queue(queue);
4237         }
4238
4239         if (stopped && !qeth_out_queue_is_full(queue))
4240                 netif_tx_start_queue(txq);
4241         return 0;
4242 }
4243
4244 int qeth_do_send_packet(struct qeth_card *card, struct qeth_qdio_out_q *queue,
4245                         struct sk_buff *skb, struct qeth_hdr *hdr,
4246                         unsigned int offset, unsigned int hd_len,
4247                         int elements_needed)
4248 {
4249         unsigned int start_index = queue->next_buf_to_fill;
4250         struct qeth_qdio_out_buffer *buffer;
4251         unsigned int next_element;
4252         struct netdev_queue *txq;
4253         bool stopped = false;
4254         int flush_count = 0;
4255         int do_pack = 0;
4256         int rc = 0;
4257
4258         buffer = queue->bufs[queue->next_buf_to_fill];
4259
4260         /* Just a sanity check, the wake/stop logic should ensure that we always
4261          * get a free buffer.
4262          */
4263         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4264                 return -EBUSY;
4265
4266         txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
4267
4268         /* check if we need to switch packing state of this queue */
4269         qeth_switch_to_packing_if_needed(queue);
4270         if (queue->do_pack) {
4271                 do_pack = 1;
4272                 /* does packet fit in current buffer? */
4273                 if (buffer->next_element_to_fill + elements_needed >
4274                     queue->max_elements) {
4275                         /* ... no -> set state PRIMED */
4276                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4277                         flush_count++;
4278                         queue->next_buf_to_fill =
4279                                 QDIO_BUFNR(queue->next_buf_to_fill + 1);
4280                         buffer = queue->bufs[queue->next_buf_to_fill];
4281
4282                         /* We stepped forward, so sanity-check again: */
4283                         if (atomic_read(&buffer->state) !=
4284                             QETH_QDIO_BUF_EMPTY) {
4285                                 qeth_flush_buffers(queue, start_index,
4286                                                            flush_count);
4287                                 rc = -EBUSY;
4288                                 goto out;
4289                         }
4290                 }
4291         }
4292
4293         if (buffer->next_element_to_fill == 0 &&
4294             atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
4295                 /* If a TX completion happens right _here_ and misses to wake
4296                  * the txq, then our re-check below will catch the race.
4297                  */
4298                 QETH_TXQ_STAT_INC(queue, stopped);
4299                 netif_tx_stop_queue(txq);
4300                 stopped = true;
4301         }
4302
4303         next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
4304         buffer->bytes += qdisc_pkt_len(skb);
4305         buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
4306
4307         if (queue->do_pack)
4308                 QETH_TXQ_STAT_INC(queue, skbs_pack);
4309         if (!queue->do_pack || stopped || next_element >= queue->max_elements) {
4310                 flush_count++;
4311                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4312                 queue->next_buf_to_fill =
4313                                 QDIO_BUFNR(queue->next_buf_to_fill + 1);
4314         }
4315
4316         if (flush_count)
4317                 qeth_flush_buffers(queue, start_index, flush_count);
4318
4319 out:
4320         if (do_pack)
4321                 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_count);
4322
4323         if (stopped && !qeth_out_queue_is_full(queue))
4324                 netif_tx_start_queue(txq);
4325         return rc;
4326 }
4327 EXPORT_SYMBOL_GPL(qeth_do_send_packet);
4328
4329 static void qeth_fill_tso_ext(struct qeth_hdr_tso *hdr,
4330                               unsigned int payload_len, struct sk_buff *skb,
4331                               unsigned int proto_len)
4332 {
4333         struct qeth_hdr_ext_tso *ext = &hdr->ext;
4334
4335         ext->hdr_tot_len = sizeof(*ext);
4336         ext->imb_hdr_no = 1;
4337         ext->hdr_type = 1;
4338         ext->hdr_version = 1;
4339         ext->hdr_len = 28;
4340         ext->payload_len = payload_len;
4341         ext->mss = skb_shinfo(skb)->gso_size;
4342         ext->dg_hdr_len = proto_len;
4343 }
4344
4345 int qeth_xmit(struct qeth_card *card, struct sk_buff *skb,
4346               struct qeth_qdio_out_q *queue, __be16 proto,
4347               void (*fill_header)(struct qeth_qdio_out_q *queue,
4348                                   struct qeth_hdr *hdr, struct sk_buff *skb,
4349                                   __be16 proto, unsigned int data_len))
4350 {
4351         unsigned int proto_len, hw_hdr_len;
4352         unsigned int frame_len = skb->len;
4353         bool is_tso = skb_is_gso(skb);
4354         unsigned int data_offset = 0;
4355         struct qeth_hdr *hdr = NULL;
4356         unsigned int hd_len = 0;
4357         unsigned int elements;
4358         int push_len, rc;
4359
4360         if (is_tso) {
4361                 hw_hdr_len = sizeof(struct qeth_hdr_tso);
4362                 proto_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
4363         } else {
4364                 hw_hdr_len = sizeof(struct qeth_hdr);
4365                 proto_len = (IS_IQD(card) && IS_LAYER2(card)) ? ETH_HLEN : 0;
4366         }
4367
4368         rc = skb_cow_head(skb, hw_hdr_len);
4369         if (rc)
4370                 return rc;
4371
4372         push_len = qeth_add_hw_header(queue, skb, &hdr, hw_hdr_len, proto_len,
4373                                       &elements);
4374         if (push_len < 0)
4375                 return push_len;
4376         if (is_tso || !push_len) {
4377                 /* HW header needs its own buffer element. */
4378                 hd_len = hw_hdr_len + proto_len;
4379                 data_offset = push_len + proto_len;
4380         }
4381         memset(hdr, 0, hw_hdr_len);
4382         fill_header(queue, hdr, skb, proto, frame_len);
4383         if (is_tso)
4384                 qeth_fill_tso_ext((struct qeth_hdr_tso *) hdr,
4385                                   frame_len - proto_len, skb, proto_len);
4386
4387         if (IS_IQD(card)) {
4388                 rc = __qeth_xmit(card, queue, skb, elements, hdr, data_offset,
4389                                  hd_len);
4390         } else {
4391                 /* TODO: drop skb_orphan() once TX completion is fast enough */
4392                 skb_orphan(skb);
4393                 spin_lock(&queue->lock);
4394                 rc = qeth_do_send_packet(card, queue, skb, hdr, data_offset,
4395                                          hd_len, elements);
4396                 spin_unlock(&queue->lock);
4397         }
4398
4399         if (rc && !push_len)
4400                 kmem_cache_free(qeth_core_header_cache, hdr);
4401
4402         return rc;
4403 }
4404 EXPORT_SYMBOL_GPL(qeth_xmit);
4405
4406 static int qeth_setadp_promisc_mode_cb(struct qeth_card *card,
4407                 struct qeth_reply *reply, unsigned long data)
4408 {
4409         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4410         struct qeth_ipacmd_setadpparms *setparms;
4411
4412         QETH_CARD_TEXT(card, 4, "prmadpcb");
4413
4414         setparms = &(cmd->data.setadapterparms);
4415         if (qeth_setadpparms_inspect_rc(cmd)) {
4416                 QETH_CARD_TEXT_(card, 4, "prmrc%x", cmd->hdr.return_code);
4417                 setparms->data.mode = SET_PROMISC_MODE_OFF;
4418         }
4419         card->info.promisc_mode = setparms->data.mode;
4420         return (cmd->hdr.return_code) ? -EIO : 0;
4421 }
4422
4423 void qeth_setadp_promisc_mode(struct qeth_card *card, bool enable)
4424 {
4425         enum qeth_ipa_promisc_modes mode = enable ? SET_PROMISC_MODE_ON :
4426                                                     SET_PROMISC_MODE_OFF;
4427         struct qeth_cmd_buffer *iob;
4428         struct qeth_ipa_cmd *cmd;
4429
4430         QETH_CARD_TEXT(card, 4, "setprom");
4431         QETH_CARD_TEXT_(card, 4, "mode:%x", mode);
4432
4433         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE,
4434                                    SETADP_DATA_SIZEOF(mode));
4435         if (!iob)
4436                 return;
4437         cmd = __ipa_cmd(iob);
4438         cmd->data.setadapterparms.data.mode = mode;
4439         qeth_send_ipa_cmd(card, iob, qeth_setadp_promisc_mode_cb, NULL);
4440 }
4441 EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode);
4442
4443 static int qeth_setadpparms_change_macaddr_cb(struct qeth_card *card,
4444                 struct qeth_reply *reply, unsigned long data)
4445 {
4446         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4447         struct qeth_ipacmd_setadpparms *adp_cmd;
4448
4449         QETH_CARD_TEXT(card, 4, "chgmaccb");
4450         if (qeth_setadpparms_inspect_rc(cmd))
4451                 return -EIO;
4452
4453         adp_cmd = &cmd->data.setadapterparms;
4454         if (!is_valid_ether_addr(adp_cmd->data.change_addr.addr))
4455                 return -EADDRNOTAVAIL;
4456
4457         if (IS_LAYER2(card) && IS_OSD(card) && !IS_VM_NIC(card) &&
4458             !(adp_cmd->hdr.flags & QETH_SETADP_FLAGS_VIRTUAL_MAC))
4459                 return -EADDRNOTAVAIL;
4460
4461         ether_addr_copy(card->dev->dev_addr, adp_cmd->data.change_addr.addr);
4462         return 0;
4463 }
4464
4465 int qeth_setadpparms_change_macaddr(struct qeth_card *card)
4466 {
4467         int rc;
4468         struct qeth_cmd_buffer *iob;
4469         struct qeth_ipa_cmd *cmd;
4470
4471         QETH_CARD_TEXT(card, 4, "chgmac");
4472
4473         iob = qeth_get_adapter_cmd(card, IPA_SETADP_ALTER_MAC_ADDRESS,
4474                                    SETADP_DATA_SIZEOF(change_addr));
4475         if (!iob)
4476                 return -ENOMEM;
4477         cmd = __ipa_cmd(iob);
4478         cmd->data.setadapterparms.data.change_addr.cmd = CHANGE_ADDR_READ_MAC;
4479         cmd->data.setadapterparms.data.change_addr.addr_size = ETH_ALEN;
4480         ether_addr_copy(cmd->data.setadapterparms.data.change_addr.addr,
4481                         card->dev->dev_addr);
4482         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_change_macaddr_cb,
4483                                NULL);
4484         return rc;
4485 }
4486 EXPORT_SYMBOL_GPL(qeth_setadpparms_change_macaddr);
4487
4488 static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card,
4489                 struct qeth_reply *reply, unsigned long data)
4490 {
4491         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4492         struct qeth_set_access_ctrl *access_ctrl_req;
4493
4494         QETH_CARD_TEXT(card, 4, "setaccb");
4495
4496         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4497         QETH_CARD_TEXT_(card, 2, "rc=%d",
4498                         cmd->data.setadapterparms.hdr.return_code);
4499         if (cmd->data.setadapterparms.hdr.return_code !=
4500                                                 SET_ACCESS_CTRL_RC_SUCCESS)
4501                 QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%#x) on device %x: %#x\n",
4502                                  access_ctrl_req->subcmd_code, CARD_DEVID(card),
4503                                  cmd->data.setadapterparms.hdr.return_code);
4504         switch (qeth_setadpparms_inspect_rc(cmd)) {
4505         case SET_ACCESS_CTRL_RC_SUCCESS:
4506                 if (access_ctrl_req->subcmd_code == ISOLATION_MODE_NONE)
4507                         dev_info(&card->gdev->dev,
4508                             "QDIO data connection isolation is deactivated\n");
4509                 else
4510                         dev_info(&card->gdev->dev,
4511                             "QDIO data connection isolation is activated\n");
4512                 return 0;
4513         case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
4514                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already deactivated\n",
4515                                  CARD_DEVID(card));
4516                 return 0;
4517         case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
4518                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already activated\n",
4519                                  CARD_DEVID(card));
4520                 return 0;
4521         case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
4522                 dev_err(&card->gdev->dev, "Adapter does not "
4523                         "support QDIO data connection isolation\n");
4524                 return -EOPNOTSUPP;
4525         case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
4526                 dev_err(&card->gdev->dev,
4527                         "Adapter is dedicated. "
4528                         "QDIO data connection isolation not supported\n");
4529                 return -EOPNOTSUPP;
4530         case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
4531                 dev_err(&card->gdev->dev,
4532                         "TSO does not permit QDIO data connection isolation\n");
4533                 return -EPERM;
4534         case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED:
4535                 dev_err(&card->gdev->dev, "The adjacent switch port does not "
4536                         "support reflective relay mode\n");
4537                 return -EOPNOTSUPP;
4538         case SET_ACCESS_CTRL_RC_REFLREL_FAILED:
4539                 dev_err(&card->gdev->dev, "The reflective relay mode cannot be "
4540                                         "enabled at the adjacent switch port");
4541                 return -EREMOTEIO;
4542         case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED:
4543                 dev_warn(&card->gdev->dev, "Turning off reflective relay mode "
4544                                         "at the adjacent switch failed\n");
4545                 /* benign error while disabling ISOLATION_MODE_FWD */
4546                 return 0;
4547         default:
4548                 return -EIO;
4549         }
4550 }
4551
4552 int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
4553                                      enum qeth_ipa_isolation_modes mode)
4554 {
4555         int rc;
4556         struct qeth_cmd_buffer *iob;
4557         struct qeth_ipa_cmd *cmd;
4558         struct qeth_set_access_ctrl *access_ctrl_req;
4559
4560         QETH_CARD_TEXT(card, 4, "setacctl");
4561
4562         if (!qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) {
4563                 dev_err(&card->gdev->dev,
4564                         "Adapter does not support QDIO data connection isolation\n");
4565                 return -EOPNOTSUPP;
4566         }
4567
4568         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL,
4569                                    SETADP_DATA_SIZEOF(set_access_ctrl));
4570         if (!iob)
4571                 return -ENOMEM;
4572         cmd = __ipa_cmd(iob);
4573         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4574         access_ctrl_req->subcmd_code = mode;
4575
4576         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb,
4577                                NULL);
4578         if (rc) {
4579                 QETH_CARD_TEXT_(card, 2, "rc=%d", rc);
4580                 QETH_DBF_MESSAGE(3, "IPA(SET_ACCESS_CTRL(%d) on device %x: sent failed\n",
4581                                  rc, CARD_DEVID(card));
4582         }
4583
4584         return rc;
4585 }
4586
4587 void qeth_tx_timeout(struct net_device *dev, unsigned int txqueue)
4588 {
4589         struct qeth_card *card;
4590
4591         card = dev->ml_priv;
4592         QETH_CARD_TEXT(card, 4, "txtimeo");
4593         qeth_schedule_recovery(card);
4594 }
4595 EXPORT_SYMBOL_GPL(qeth_tx_timeout);
4596
4597 static int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum)
4598 {
4599         struct qeth_card *card = dev->ml_priv;
4600         int rc = 0;
4601
4602         switch (regnum) {
4603         case MII_BMCR: /* Basic mode control register */
4604                 rc = BMCR_FULLDPLX;
4605                 if ((card->info.link_type != QETH_LINK_TYPE_GBIT_ETH) &&
4606                     (card->info.link_type != QETH_LINK_TYPE_OSN) &&
4607                     (card->info.link_type != QETH_LINK_TYPE_10GBIT_ETH) &&
4608                     (card->info.link_type != QETH_LINK_TYPE_25GBIT_ETH))
4609                         rc |= BMCR_SPEED100;
4610                 break;
4611         case MII_BMSR: /* Basic mode status register */
4612                 rc = BMSR_ERCAP | BMSR_ANEGCOMPLETE | BMSR_LSTATUS |
4613                      BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | BMSR_100FULL |
4614                      BMSR_100BASE4;
4615                 break;
4616         case MII_PHYSID1: /* PHYS ID 1 */
4617                 rc = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 8) |
4618                      dev->dev_addr[2];
4619                 rc = (rc >> 5) & 0xFFFF;
4620                 break;
4621         case MII_PHYSID2: /* PHYS ID 2 */
4622                 rc = (dev->dev_addr[2] << 10) & 0xFFFF;
4623                 break;
4624         case MII_ADVERTISE: /* Advertisement control reg */
4625                 rc = ADVERTISE_ALL;
4626                 break;
4627         case MII_LPA: /* Link partner ability reg */
4628                 rc = LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL |
4629                      LPA_100BASE4 | LPA_LPACK;
4630                 break;
4631         case MII_EXPANSION: /* Expansion register */
4632                 break;
4633         case MII_DCOUNTER: /* disconnect counter */
4634                 break;
4635         case MII_FCSCOUNTER: /* false carrier counter */
4636                 break;
4637         case MII_NWAYTEST: /* N-way auto-neg test register */
4638                 break;
4639         case MII_RERRCOUNTER: /* rx error counter */
4640                 rc = card->stats.rx_length_errors +
4641                      card->stats.rx_frame_errors +
4642                      card->stats.rx_fifo_errors;
4643                 break;
4644         case MII_SREVISION: /* silicon revision */
4645                 break;
4646         case MII_RESV1: /* reserved 1 */
4647                 break;
4648         case MII_LBRERROR: /* loopback, rx, bypass error */
4649                 break;
4650         case MII_PHYADDR: /* physical address */
4651                 break;
4652         case MII_RESV2: /* reserved 2 */
4653                 break;
4654         case MII_TPISTATUS: /* TPI status for 10mbps */
4655                 break;
4656         case MII_NCONFIG: /* network interface config */
4657                 break;
4658         default:
4659                 break;
4660         }
4661         return rc;
4662 }
4663
4664 static int qeth_snmp_command_cb(struct qeth_card *card,
4665                                 struct qeth_reply *reply, unsigned long data)
4666 {
4667         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4668         struct qeth_arp_query_info *qinfo = reply->param;
4669         struct qeth_ipacmd_setadpparms *adp_cmd;
4670         unsigned int data_len;
4671         void *snmp_data;
4672
4673         QETH_CARD_TEXT(card, 3, "snpcmdcb");
4674
4675         if (cmd->hdr.return_code) {
4676                 QETH_CARD_TEXT_(card, 4, "scer1%x", cmd->hdr.return_code);
4677                 return -EIO;
4678         }
4679         if (cmd->data.setadapterparms.hdr.return_code) {
4680                 cmd->hdr.return_code =
4681                         cmd->data.setadapterparms.hdr.return_code;
4682                 QETH_CARD_TEXT_(card, 4, "scer2%x", cmd->hdr.return_code);
4683                 return -EIO;
4684         }
4685
4686         adp_cmd = &cmd->data.setadapterparms;
4687         data_len = adp_cmd->hdr.cmdlength - sizeof(adp_cmd->hdr);
4688         if (adp_cmd->hdr.seq_no == 1) {
4689                 snmp_data = &adp_cmd->data.snmp;
4690         } else {
4691                 snmp_data = &adp_cmd->data.snmp.request;
4692                 data_len -= offsetof(struct qeth_snmp_cmd, request);
4693         }
4694
4695         /* check if there is enough room in userspace */
4696         if ((qinfo->udata_len - qinfo->udata_offset) < data_len) {
4697                 QETH_CARD_TEXT_(card, 4, "scer3%i", -ENOSPC);
4698                 return -ENOSPC;
4699         }
4700         QETH_CARD_TEXT_(card, 4, "snore%i",
4701                         cmd->data.setadapterparms.hdr.used_total);
4702         QETH_CARD_TEXT_(card, 4, "sseqn%i",
4703                         cmd->data.setadapterparms.hdr.seq_no);
4704         /*copy entries to user buffer*/
4705         memcpy(qinfo->udata + qinfo->udata_offset, snmp_data, data_len);
4706         qinfo->udata_offset += data_len;
4707
4708         if (cmd->data.setadapterparms.hdr.seq_no <
4709             cmd->data.setadapterparms.hdr.used_total)
4710                 return 1;
4711         return 0;
4712 }
4713
4714 static int qeth_snmp_command(struct qeth_card *card, char __user *udata)
4715 {
4716         struct qeth_snmp_ureq __user *ureq;
4717         struct qeth_cmd_buffer *iob;
4718         unsigned int req_len;
4719         struct qeth_arp_query_info qinfo = {0, };
4720         int rc = 0;
4721
4722         QETH_CARD_TEXT(card, 3, "snmpcmd");
4723
4724         if (IS_VM_NIC(card))
4725                 return -EOPNOTSUPP;
4726
4727         if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) &&
4728             IS_LAYER3(card))
4729                 return -EOPNOTSUPP;
4730
4731         ureq = (struct qeth_snmp_ureq __user *) udata;
4732         if (get_user(qinfo.udata_len, &ureq->hdr.data_len) ||
4733             get_user(req_len, &ureq->hdr.req_len))
4734                 return -EFAULT;
4735
4736         /* Sanitize user input, to avoid overflows in iob size calculation: */
4737         if (req_len > QETH_BUFSIZE)
4738                 return -EINVAL;
4739
4740         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL, req_len);
4741         if (!iob)
4742                 return -ENOMEM;
4743
4744         if (copy_from_user(&__ipa_cmd(iob)->data.setadapterparms.data.snmp,
4745                            &ureq->cmd, req_len)) {
4746                 qeth_put_cmd(iob);
4747                 return -EFAULT;
4748         }
4749
4750         qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
4751         if (!qinfo.udata) {
4752                 qeth_put_cmd(iob);
4753                 return -ENOMEM;
4754         }
4755         qinfo.udata_offset = sizeof(struct qeth_snmp_ureq_hdr);
4756
4757         rc = qeth_send_ipa_cmd(card, iob, qeth_snmp_command_cb, &qinfo);
4758         if (rc)
4759                 QETH_DBF_MESSAGE(2, "SNMP command failed on device %x: (%#x)\n",
4760                                  CARD_DEVID(card), rc);
4761         else {
4762                 if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
4763                         rc = -EFAULT;
4764         }
4765
4766         kfree(qinfo.udata);
4767         return rc;
4768 }
4769
4770 static int qeth_setadpparms_query_oat_cb(struct qeth_card *card,
4771                                          struct qeth_reply *reply,
4772                                          unsigned long data)
4773 {
4774         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4775         struct qeth_qoat_priv *priv = reply->param;
4776         int resdatalen;
4777
4778         QETH_CARD_TEXT(card, 3, "qoatcb");
4779         if (qeth_setadpparms_inspect_rc(cmd))
4780                 return -EIO;
4781
4782         resdatalen = cmd->data.setadapterparms.hdr.cmdlength;
4783
4784         if (resdatalen > (priv->buffer_len - priv->response_len))
4785                 return -ENOSPC;
4786
4787         memcpy(priv->buffer + priv->response_len,
4788                &cmd->data.setadapterparms.hdr, resdatalen);
4789         priv->response_len += resdatalen;
4790
4791         if (cmd->data.setadapterparms.hdr.seq_no <
4792             cmd->data.setadapterparms.hdr.used_total)
4793                 return 1;
4794         return 0;
4795 }
4796
4797 static int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
4798 {
4799         int rc = 0;
4800         struct qeth_cmd_buffer *iob;
4801         struct qeth_ipa_cmd *cmd;
4802         struct qeth_query_oat *oat_req;
4803         struct qeth_query_oat_data oat_data;
4804         struct qeth_qoat_priv priv;
4805         void __user *tmp;
4806
4807         QETH_CARD_TEXT(card, 3, "qoatcmd");
4808
4809         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT))
4810                 return -EOPNOTSUPP;
4811
4812         if (copy_from_user(&oat_data, udata, sizeof(oat_data)))
4813                 return -EFAULT;
4814
4815         priv.buffer_len = oat_data.buffer_len;
4816         priv.response_len = 0;
4817         priv.buffer = vzalloc(oat_data.buffer_len);
4818         if (!priv.buffer)
4819                 return -ENOMEM;
4820
4821         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4822                                    SETADP_DATA_SIZEOF(query_oat));
4823         if (!iob) {
4824                 rc = -ENOMEM;
4825                 goto out_free;
4826         }
4827         cmd = __ipa_cmd(iob);
4828         oat_req = &cmd->data.setadapterparms.data.query_oat;
4829         oat_req->subcmd_code = oat_data.command;
4830
4831         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb, &priv);
4832         if (!rc) {
4833                 tmp = is_compat_task() ? compat_ptr(oat_data.ptr) :
4834                                          u64_to_user_ptr(oat_data.ptr);
4835                 oat_data.response_len = priv.response_len;
4836
4837                 if (copy_to_user(tmp, priv.buffer, priv.response_len) ||
4838                     copy_to_user(udata, &oat_data, sizeof(oat_data)))
4839                         rc = -EFAULT;
4840         }
4841
4842 out_free:
4843         vfree(priv.buffer);
4844         return rc;
4845 }
4846
4847 static int qeth_query_card_info_cb(struct qeth_card *card,
4848                                    struct qeth_reply *reply, unsigned long data)
4849 {
4850         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4851         struct qeth_link_info *link_info = reply->param;
4852         struct qeth_query_card_info *card_info;
4853
4854         QETH_CARD_TEXT(card, 2, "qcrdincb");
4855         if (qeth_setadpparms_inspect_rc(cmd))
4856                 return -EIO;
4857
4858         card_info = &cmd->data.setadapterparms.data.card_info;
4859         netdev_dbg(card->dev,
4860                    "card info: card_type=0x%02x, port_mode=0x%04x, port_speed=0x%08x\n",
4861                    card_info->card_type, card_info->port_mode,
4862                    card_info->port_speed);
4863
4864         switch (card_info->port_mode) {
4865         case CARD_INFO_PORTM_FULLDUPLEX:
4866                 link_info->duplex = DUPLEX_FULL;
4867                 break;
4868         case CARD_INFO_PORTM_HALFDUPLEX:
4869                 link_info->duplex = DUPLEX_HALF;
4870                 break;
4871         default:
4872                 link_info->duplex = DUPLEX_UNKNOWN;
4873         }
4874
4875         switch (card_info->card_type) {
4876         case CARD_INFO_TYPE_1G_COPPER_A:
4877         case CARD_INFO_TYPE_1G_COPPER_B:
4878                 link_info->speed = SPEED_1000;
4879                 link_info->port = PORT_TP;
4880                 break;
4881         case CARD_INFO_TYPE_1G_FIBRE_A:
4882         case CARD_INFO_TYPE_1G_FIBRE_B:
4883                 link_info->speed = SPEED_1000;
4884                 link_info->port = PORT_FIBRE;
4885                 break;
4886         case CARD_INFO_TYPE_10G_FIBRE_A:
4887         case CARD_INFO_TYPE_10G_FIBRE_B:
4888                 link_info->speed = SPEED_10000;
4889                 link_info->port = PORT_FIBRE;
4890                 break;
4891         default:
4892                 switch (card_info->port_speed) {
4893                 case CARD_INFO_PORTS_10M:
4894                         link_info->speed = SPEED_10;
4895                         break;
4896                 case CARD_INFO_PORTS_100M:
4897                         link_info->speed = SPEED_100;
4898                         break;
4899                 case CARD_INFO_PORTS_1G:
4900                         link_info->speed = SPEED_1000;
4901                         break;
4902                 case CARD_INFO_PORTS_10G:
4903                         link_info->speed = SPEED_10000;
4904                         break;
4905                 case CARD_INFO_PORTS_25G:
4906                         link_info->speed = SPEED_25000;
4907                         break;
4908                 default:
4909                         link_info->speed = SPEED_UNKNOWN;
4910                 }
4911
4912                 link_info->port = PORT_OTHER;
4913         }
4914
4915         return 0;
4916 }
4917
4918 int qeth_query_card_info(struct qeth_card *card,
4919                          struct qeth_link_info *link_info)
4920 {
4921         struct qeth_cmd_buffer *iob;
4922
4923         QETH_CARD_TEXT(card, 2, "qcrdinfo");
4924         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_CARD_INFO))
4925                 return -EOPNOTSUPP;
4926         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_CARD_INFO, 0);
4927         if (!iob)
4928                 return -ENOMEM;
4929
4930         return qeth_send_ipa_cmd(card, iob, qeth_query_card_info_cb, link_info);
4931 }
4932
4933 static int qeth_init_link_info_oat_cb(struct qeth_card *card,
4934                                       struct qeth_reply *reply_priv,
4935                                       unsigned long data)
4936 {
4937         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4938         struct qeth_link_info *link_info = reply_priv->param;
4939         struct qeth_query_oat_physical_if *phys_if;
4940         struct qeth_query_oat_reply *reply;
4941
4942         if (qeth_setadpparms_inspect_rc(cmd))
4943                 return -EIO;
4944
4945         /* Multi-part reply is unexpected, don't bother: */
4946         if (cmd->data.setadapterparms.hdr.used_total > 1)
4947                 return -EINVAL;
4948
4949         /* Expect the reply to start with phys_if data: */
4950         reply = &cmd->data.setadapterparms.data.query_oat.reply[0];
4951         if (reply->type != QETH_QOAT_REPLY_TYPE_PHYS_IF ||
4952             reply->length < sizeof(*reply))
4953                 return -EINVAL;
4954
4955         phys_if = &reply->phys_if;
4956
4957         switch (phys_if->speed_duplex) {
4958         case QETH_QOAT_PHYS_SPEED_10M_HALF:
4959                 link_info->speed = SPEED_10;
4960                 link_info->duplex = DUPLEX_HALF;
4961                 break;
4962         case QETH_QOAT_PHYS_SPEED_10M_FULL:
4963                 link_info->speed = SPEED_10;
4964                 link_info->duplex = DUPLEX_FULL;
4965                 break;
4966         case QETH_QOAT_PHYS_SPEED_100M_HALF:
4967                 link_info->speed = SPEED_100;
4968                 link_info->duplex = DUPLEX_HALF;
4969                 break;
4970         case QETH_QOAT_PHYS_SPEED_100M_FULL:
4971                 link_info->speed = SPEED_100;
4972                 link_info->duplex = DUPLEX_FULL;
4973                 break;
4974         case QETH_QOAT_PHYS_SPEED_1000M_HALF:
4975                 link_info->speed = SPEED_1000;
4976                 link_info->duplex = DUPLEX_HALF;
4977                 break;
4978         case QETH_QOAT_PHYS_SPEED_1000M_FULL:
4979                 link_info->speed = SPEED_1000;
4980                 link_info->duplex = DUPLEX_FULL;
4981                 break;
4982         case QETH_QOAT_PHYS_SPEED_10G_FULL:
4983                 link_info->speed = SPEED_10000;
4984                 link_info->duplex = DUPLEX_FULL;
4985                 break;
4986         case QETH_QOAT_PHYS_SPEED_25G_FULL:
4987                 link_info->speed = SPEED_25000;
4988                 link_info->duplex = DUPLEX_FULL;
4989                 break;
4990         case QETH_QOAT_PHYS_SPEED_UNKNOWN:
4991         default:
4992                 link_info->speed = SPEED_UNKNOWN;
4993                 link_info->duplex = DUPLEX_UNKNOWN;
4994                 break;
4995         }
4996
4997         switch (phys_if->media_type) {
4998         case QETH_QOAT_PHYS_MEDIA_COPPER:
4999                 link_info->port = PORT_TP;
5000                 link_info->link_mode = QETH_LINK_MODE_UNKNOWN;
5001                 break;
5002         case QETH_QOAT_PHYS_MEDIA_FIBRE_SHORT:
5003                 link_info->port = PORT_FIBRE;
5004                 link_info->link_mode = QETH_LINK_MODE_FIBRE_SHORT;
5005                 break;
5006         case QETH_QOAT_PHYS_MEDIA_FIBRE_LONG:
5007                 link_info->port = PORT_FIBRE;
5008                 link_info->link_mode = QETH_LINK_MODE_FIBRE_LONG;
5009                 break;
5010         default:
5011                 link_info->port = PORT_OTHER;
5012                 link_info->link_mode = QETH_LINK_MODE_UNKNOWN;
5013                 break;
5014         }
5015
5016         return 0;
5017 }
5018
5019 static void qeth_init_link_info(struct qeth_card *card)
5020 {
5021         card->info.link_info.duplex = DUPLEX_FULL;
5022
5023         if (IS_IQD(card) || IS_VM_NIC(card)) {
5024                 card->info.link_info.speed = SPEED_10000;
5025                 card->info.link_info.port = PORT_FIBRE;
5026                 card->info.link_info.link_mode = QETH_LINK_MODE_FIBRE_SHORT;
5027         } else {
5028                 switch (card->info.link_type) {
5029                 case QETH_LINK_TYPE_FAST_ETH:
5030                 case QETH_LINK_TYPE_LANE_ETH100:
5031                         card->info.link_info.speed = SPEED_100;
5032                         card->info.link_info.port = PORT_TP;
5033                         break;
5034                 case QETH_LINK_TYPE_GBIT_ETH:
5035                 case QETH_LINK_TYPE_LANE_ETH1000:
5036                         card->info.link_info.speed = SPEED_1000;
5037                         card->info.link_info.port = PORT_FIBRE;
5038                         break;
5039                 case QETH_LINK_TYPE_10GBIT_ETH:
5040                         card->info.link_info.speed = SPEED_10000;
5041                         card->info.link_info.port = PORT_FIBRE;
5042                         break;
5043                 case QETH_LINK_TYPE_25GBIT_ETH:
5044                         card->info.link_info.speed = SPEED_25000;
5045                         card->info.link_info.port = PORT_FIBRE;
5046                         break;
5047                 default:
5048                         dev_info(&card->gdev->dev, "Unknown link type %x\n",
5049                                  card->info.link_type);
5050                         card->info.link_info.speed = SPEED_UNKNOWN;
5051                         card->info.link_info.port = PORT_OTHER;
5052                 }
5053
5054                 card->info.link_info.link_mode = QETH_LINK_MODE_UNKNOWN;
5055         }
5056
5057         /* Get more accurate data via QUERY OAT: */
5058         if (qeth_adp_supported(card, IPA_SETADP_QUERY_OAT)) {
5059                 struct qeth_link_info link_info;
5060                 struct qeth_cmd_buffer *iob;
5061
5062                 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
5063                                            SETADP_DATA_SIZEOF(query_oat));
5064                 if (iob) {
5065                         struct qeth_ipa_cmd *cmd = __ipa_cmd(iob);
5066                         struct qeth_query_oat *oat_req;
5067
5068                         oat_req = &cmd->data.setadapterparms.data.query_oat;
5069                         oat_req->subcmd_code = QETH_QOAT_SCOPE_INTERFACE;
5070
5071                         if (!qeth_send_ipa_cmd(card, iob,
5072                                                qeth_init_link_info_oat_cb,
5073                                                &link_info)) {
5074                                 if (link_info.speed != SPEED_UNKNOWN)
5075                                         card->info.link_info.speed = link_info.speed;
5076                                 if (link_info.duplex != DUPLEX_UNKNOWN)
5077                                         card->info.link_info.duplex = link_info.duplex;
5078                                 if (link_info.port != PORT_OTHER)
5079                                         card->info.link_info.port = link_info.port;
5080                                 if (link_info.link_mode != QETH_LINK_MODE_UNKNOWN)
5081                                         card->info.link_info.link_mode = link_info.link_mode;
5082                         }
5083                 }
5084         }
5085 }
5086
5087 /**
5088  * qeth_vm_request_mac() - Request a hypervisor-managed MAC address
5089  * @card: pointer to a qeth_card
5090  *
5091  * Returns
5092  *      0, if a MAC address has been set for the card's netdevice
5093  *      a return code, for various error conditions
5094  */
5095 int qeth_vm_request_mac(struct qeth_card *card)
5096 {
5097         struct diag26c_mac_resp *response;
5098         struct diag26c_mac_req *request;
5099         int rc;
5100
5101         QETH_CARD_TEXT(card, 2, "vmreqmac");
5102
5103         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
5104         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
5105         if (!request || !response) {
5106                 rc = -ENOMEM;
5107                 goto out;
5108         }
5109
5110         request->resp_buf_len = sizeof(*response);
5111         request->resp_version = DIAG26C_VERSION2;
5112         request->op_code = DIAG26C_GET_MAC;
5113         request->devno = card->info.ddev_devno;
5114
5115         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
5116         rc = diag26c(request, response, DIAG26C_MAC_SERVICES);
5117         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
5118         if (rc)
5119                 goto out;
5120         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
5121
5122         if (request->resp_buf_len < sizeof(*response) ||
5123             response->version != request->resp_version) {
5124                 rc = -EIO;
5125                 QETH_CARD_TEXT(card, 2, "badresp");
5126                 QETH_CARD_HEX(card, 2, &request->resp_buf_len,
5127                               sizeof(request->resp_buf_len));
5128         } else if (!is_valid_ether_addr(response->mac)) {
5129                 rc = -EINVAL;
5130                 QETH_CARD_TEXT(card, 2, "badmac");
5131                 QETH_CARD_HEX(card, 2, response->mac, ETH_ALEN);
5132         } else {
5133                 ether_addr_copy(card->dev->dev_addr, response->mac);
5134         }
5135
5136 out:
5137         kfree(response);
5138         kfree(request);
5139         return rc;
5140 }
5141 EXPORT_SYMBOL_GPL(qeth_vm_request_mac);
5142
5143 static void qeth_determine_capabilities(struct qeth_card *card)
5144 {
5145         struct qeth_channel *channel = &card->data;
5146         struct ccw_device *ddev = channel->ccwdev;
5147         int rc;
5148         int ddev_offline = 0;
5149
5150         QETH_CARD_TEXT(card, 2, "detcapab");
5151         if (!ddev->online) {
5152                 ddev_offline = 1;
5153                 rc = qeth_start_channel(channel);
5154                 if (rc) {
5155                         QETH_CARD_TEXT_(card, 2, "3err%d", rc);
5156                         goto out;
5157                 }
5158         }
5159
5160         rc = qeth_read_conf_data(card);
5161         if (rc) {
5162                 QETH_DBF_MESSAGE(2, "qeth_read_conf_data on device %x returned %i\n",
5163                                  CARD_DEVID(card), rc);
5164                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
5165                 goto out_offline;
5166         }
5167
5168         rc = qdio_get_ssqd_desc(ddev, &card->ssqd);
5169         if (rc)
5170                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
5171
5172         QETH_CARD_TEXT_(card, 2, "qfmt%d", card->ssqd.qfmt);
5173         QETH_CARD_TEXT_(card, 2, "ac1:%02x", card->ssqd.qdioac1);
5174         QETH_CARD_TEXT_(card, 2, "ac2:%04x", card->ssqd.qdioac2);
5175         QETH_CARD_TEXT_(card, 2, "ac3:%04x", card->ssqd.qdioac3);
5176         QETH_CARD_TEXT_(card, 2, "icnt%d", card->ssqd.icnt);
5177         if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) ||
5178             ((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) ||
5179             ((card->ssqd.qdioac3 & CHSC_AC3_FORMAT2_CQ_AVAILABLE) == 0))) {
5180                 dev_info(&card->gdev->dev,
5181                         "Completion Queueing supported\n");
5182         } else {
5183                 card->options.cq = QETH_CQ_NOTAVAILABLE;
5184         }
5185
5186 out_offline:
5187         if (ddev_offline == 1)
5188                 qeth_stop_channel(channel);
5189 out:
5190         return;
5191 }
5192
5193 static void qeth_read_ccw_conf_data(struct qeth_card *card)
5194 {
5195         struct qeth_card_info *info = &card->info;
5196         struct ccw_device *cdev = CARD_DDEV(card);
5197         struct ccw_dev_id dev_id;
5198
5199         QETH_CARD_TEXT(card, 2, "ccwconfd");
5200         ccw_device_get_id(cdev, &dev_id);
5201
5202         info->ddev_devno = dev_id.devno;
5203         info->ids_valid = !ccw_device_get_cssid(cdev, &info->cssid) &&
5204                           !ccw_device_get_iid(cdev, &info->iid) &&
5205                           !ccw_device_get_chid(cdev, 0, &info->chid);
5206         info->ssid = dev_id.ssid;
5207
5208         dev_info(&card->gdev->dev, "CHID: %x CHPID: %x\n",
5209                  info->chid, info->chpid);
5210
5211         QETH_CARD_TEXT_(card, 3, "devn%x", info->ddev_devno);
5212         QETH_CARD_TEXT_(card, 3, "cssid:%x", info->cssid);
5213         QETH_CARD_TEXT_(card, 3, "iid:%x", info->iid);
5214         QETH_CARD_TEXT_(card, 3, "ssid:%x", info->ssid);
5215         QETH_CARD_TEXT_(card, 3, "chpid:%x", info->chpid);
5216         QETH_CARD_TEXT_(card, 3, "chid:%x", info->chid);
5217         QETH_CARD_TEXT_(card, 3, "idval%x", info->ids_valid);
5218 }
5219
5220 static int qeth_qdio_establish(struct qeth_card *card)
5221 {
5222         struct qdio_buffer **out_sbal_ptrs[QETH_MAX_OUT_QUEUES];
5223         struct qdio_buffer **in_sbal_ptrs[QETH_MAX_IN_QUEUES];
5224         struct qeth_qib_parms *qib_parms = NULL;
5225         struct qdio_initialize init_data;
5226         unsigned int i;
5227         int rc = 0;
5228
5229         QETH_CARD_TEXT(card, 2, "qdioest");
5230
5231         if (!IS_IQD(card) && !IS_VM_NIC(card)) {
5232                 qib_parms = kzalloc(sizeof_field(struct qib, parm), GFP_KERNEL);
5233                 if (!qib_parms)
5234                         return -ENOMEM;
5235
5236                 qeth_fill_qib_parms(card, qib_parms);
5237         }
5238
5239         in_sbal_ptrs[0] = card->qdio.in_q->qdio_bufs;
5240         if (card->options.cq == QETH_CQ_ENABLED)
5241                 in_sbal_ptrs[1] = card->qdio.c_q->qdio_bufs;
5242
5243         for (i = 0; i < card->qdio.no_out_queues; i++)
5244                 out_sbal_ptrs[i] = card->qdio.out_qs[i]->qdio_bufs;
5245
5246         memset(&init_data, 0, sizeof(struct qdio_initialize));
5247         init_data.q_format               = IS_IQD(card) ? QDIO_IQDIO_QFMT :
5248                                                           QDIO_QETH_QFMT;
5249         init_data.qib_param_field_format = 0;
5250         init_data.qib_param_field        = (void *)qib_parms;
5251         init_data.no_input_qs            = card->qdio.no_in_queues;
5252         init_data.no_output_qs           = card->qdio.no_out_queues;
5253         init_data.input_handler          = qeth_qdio_input_handler;
5254         init_data.output_handler         = qeth_qdio_output_handler;
5255         init_data.irq_poll               = qeth_qdio_poll;
5256         init_data.int_parm               = (unsigned long) card;
5257         init_data.input_sbal_addr_array  = in_sbal_ptrs;
5258         init_data.output_sbal_addr_array = out_sbal_ptrs;
5259         init_data.scan_threshold         = IS_IQD(card) ? 0 : 32;
5260
5261         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED,
5262                 QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) {
5263                 rc = qdio_allocate(CARD_DDEV(card), init_data.no_input_qs,
5264                                    init_data.no_output_qs);
5265                 if (rc) {
5266                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5267                         goto out;
5268                 }
5269                 rc = qdio_establish(CARD_DDEV(card), &init_data);
5270                 if (rc) {
5271                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5272                         qdio_free(CARD_DDEV(card));
5273                 }
5274         }
5275
5276         switch (card->options.cq) {
5277         case QETH_CQ_ENABLED:
5278                 dev_info(&card->gdev->dev, "Completion Queue support enabled");
5279                 break;
5280         case QETH_CQ_DISABLED:
5281                 dev_info(&card->gdev->dev, "Completion Queue support disabled");
5282                 break;
5283         default:
5284                 break;
5285         }
5286
5287 out:
5288         kfree(qib_parms);
5289         return rc;
5290 }
5291
5292 static void qeth_core_free_card(struct qeth_card *card)
5293 {
5294         QETH_CARD_TEXT(card, 2, "freecrd");
5295
5296         unregister_service_level(&card->qeth_service_level);
5297         debugfs_remove_recursive(card->debugfs);
5298         qeth_put_cmd(card->read_cmd);
5299         destroy_workqueue(card->event_wq);
5300         dev_set_drvdata(&card->gdev->dev, NULL);
5301         kfree(card);
5302 }
5303
5304 static void qeth_trace_features(struct qeth_card *card)
5305 {
5306         QETH_CARD_TEXT(card, 2, "features");
5307         QETH_CARD_HEX(card, 2, &card->options.ipa4, sizeof(card->options.ipa4));
5308         QETH_CARD_HEX(card, 2, &card->options.ipa6, sizeof(card->options.ipa6));
5309         QETH_CARD_HEX(card, 2, &card->options.adp, sizeof(card->options.adp));
5310         QETH_CARD_HEX(card, 2, &card->info.diagass_support,
5311                       sizeof(card->info.diagass_support));
5312 }
5313
5314 static struct ccw_device_id qeth_ids[] = {
5315         {CCW_DEVICE_DEVTYPE(0x1731, 0x01, 0x1732, 0x01),
5316                                         .driver_info = QETH_CARD_TYPE_OSD},
5317         {CCW_DEVICE_DEVTYPE(0x1731, 0x05, 0x1732, 0x05),
5318                                         .driver_info = QETH_CARD_TYPE_IQD},
5319 #ifdef CONFIG_QETH_OSN
5320         {CCW_DEVICE_DEVTYPE(0x1731, 0x06, 0x1732, 0x06),
5321                                         .driver_info = QETH_CARD_TYPE_OSN},
5322 #endif
5323         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x03),
5324                                         .driver_info = QETH_CARD_TYPE_OSM},
5325 #ifdef CONFIG_QETH_OSX
5326         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x02),
5327                                         .driver_info = QETH_CARD_TYPE_OSX},
5328 #endif
5329         {},
5330 };
5331 MODULE_DEVICE_TABLE(ccw, qeth_ids);
5332
5333 static struct ccw_driver qeth_ccw_driver = {
5334         .driver = {
5335                 .owner = THIS_MODULE,
5336                 .name = "qeth",
5337         },
5338         .ids = qeth_ids,
5339         .probe = ccwgroup_probe_ccwdev,
5340         .remove = ccwgroup_remove_ccwdev,
5341 };
5342
5343 static int qeth_hardsetup_card(struct qeth_card *card, bool *carrier_ok)
5344 {
5345         int retries = 3;
5346         int rc;
5347
5348         QETH_CARD_TEXT(card, 2, "hrdsetup");
5349         atomic_set(&card->force_alloc_skb, 0);
5350         rc = qeth_update_from_chp_desc(card);
5351         if (rc)
5352                 return rc;
5353 retry:
5354         if (retries < 3)
5355                 QETH_DBF_MESSAGE(2, "Retrying to do IDX activates on device %x.\n",
5356                                  CARD_DEVID(card));
5357         rc = qeth_qdio_clear_card(card, !IS_IQD(card));
5358         qeth_stop_channel(&card->data);
5359         qeth_stop_channel(&card->write);
5360         qeth_stop_channel(&card->read);
5361         qdio_free(CARD_DDEV(card));
5362
5363         rc = qeth_start_channel(&card->read);
5364         if (rc)
5365                 goto retriable;
5366         rc = qeth_start_channel(&card->write);
5367         if (rc)
5368                 goto retriable;
5369         rc = qeth_start_channel(&card->data);
5370         if (rc)
5371                 goto retriable;
5372 retriable:
5373         if (rc == -ERESTARTSYS) {
5374                 QETH_CARD_TEXT(card, 2, "break1");
5375                 return rc;
5376         } else if (rc) {
5377                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
5378                 if (--retries < 0)
5379                         goto out;
5380                 else
5381                         goto retry;
5382         }
5383
5384         qeth_determine_capabilities(card);
5385         qeth_read_ccw_conf_data(card);
5386         qeth_idx_init(card);
5387
5388         rc = qeth_idx_activate_read_channel(card);
5389         if (rc == -EINTR) {
5390                 QETH_CARD_TEXT(card, 2, "break2");
5391                 return rc;
5392         } else if (rc) {
5393                 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
5394                 if (--retries < 0)
5395                         goto out;
5396                 else
5397                         goto retry;
5398         }
5399
5400         rc = qeth_idx_activate_write_channel(card);
5401         if (rc == -EINTR) {
5402                 QETH_CARD_TEXT(card, 2, "break3");
5403                 return rc;
5404         } else if (rc) {
5405                 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
5406                 if (--retries < 0)
5407                         goto out;
5408                 else
5409                         goto retry;
5410         }
5411         card->read_or_write_problem = 0;
5412         rc = qeth_mpc_initialize(card);
5413         if (rc) {
5414                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
5415                 goto out;
5416         }
5417
5418         rc = qeth_send_startlan(card);
5419         if (rc) {
5420                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
5421                 if (rc == -ENETDOWN) {
5422                         dev_warn(&card->gdev->dev, "The LAN is offline\n");
5423                         *carrier_ok = false;
5424                 } else {
5425                         goto out;
5426                 }
5427         } else {
5428                 *carrier_ok = true;
5429         }
5430
5431         card->options.ipa4.supported = 0;
5432         card->options.ipa6.supported = 0;
5433         card->options.adp.supported = 0;
5434         card->options.sbp.supported_funcs = 0;
5435         card->info.diagass_support = 0;
5436         rc = qeth_query_ipassists(card, QETH_PROT_IPV4);
5437         if (rc == -ENOMEM)
5438                 goto out;
5439         if (qeth_is_supported(card, IPA_IPV6)) {
5440                 rc = qeth_query_ipassists(card, QETH_PROT_IPV6);
5441                 if (rc == -ENOMEM)
5442                         goto out;
5443         }
5444         if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
5445                 rc = qeth_query_setadapterparms(card);
5446                 if (rc < 0) {
5447                         QETH_CARD_TEXT_(card, 2, "7err%d", rc);
5448                         goto out;
5449                 }
5450         }
5451         if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
5452                 rc = qeth_query_setdiagass(card);
5453                 if (rc)
5454                         QETH_CARD_TEXT_(card, 2, "8err%d", rc);
5455         }
5456
5457         qeth_trace_features(card);
5458
5459         if (!qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP) ||
5460             (card->info.hwtrap && qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM)))
5461                 card->info.hwtrap = 0;
5462
5463         if (card->options.isolation != ISOLATION_MODE_NONE) {
5464                 rc = qeth_setadpparms_set_access_ctrl(card,
5465                                                       card->options.isolation);
5466                 if (rc)
5467                         goto out;
5468         }
5469
5470         qeth_init_link_info(card);
5471
5472         rc = qeth_init_qdio_queues(card);
5473         if (rc) {
5474                 QETH_CARD_TEXT_(card, 2, "9err%d", rc);
5475                 goto out;
5476         }
5477
5478         return 0;
5479 out:
5480         dev_warn(&card->gdev->dev, "The qeth device driver failed to recover "
5481                 "an error on the device\n");
5482         QETH_DBF_MESSAGE(2, "Initialization for device %x failed in hardsetup! rc=%d\n",
5483                          CARD_DEVID(card), rc);
5484         return rc;
5485 }
5486
5487 static int qeth_set_online(struct qeth_card *card,
5488                            const struct qeth_discipline *disc)
5489 {
5490         bool carrier_ok;
5491         int rc;
5492
5493         mutex_lock(&card->conf_mutex);
5494         QETH_CARD_TEXT(card, 2, "setonlin");
5495
5496         rc = qeth_hardsetup_card(card, &carrier_ok);
5497         if (rc) {
5498                 QETH_CARD_TEXT_(card, 2, "2err%04x", rc);
5499                 rc = -ENODEV;
5500                 goto err_hardsetup;
5501         }
5502
5503         qeth_print_status_message(card);
5504
5505         if (card->dev->reg_state != NETREG_REGISTERED)
5506                 /* no need for locking / error handling at this early stage: */
5507                 qeth_set_real_num_tx_queues(card, qeth_tx_actual_queues(card));
5508
5509         rc = disc->set_online(card, carrier_ok);
5510         if (rc)
5511                 goto err_online;
5512
5513         /* let user_space know that device is online */
5514         kobject_uevent(&card->gdev->dev.kobj, KOBJ_CHANGE);
5515
5516         mutex_unlock(&card->conf_mutex);
5517         return 0;
5518
5519 err_online:
5520 err_hardsetup:
5521         qeth_qdio_clear_card(card, 0);
5522         qeth_clear_working_pool_list(card);
5523         qeth_flush_local_addrs(card);
5524
5525         qeth_stop_channel(&card->data);
5526         qeth_stop_channel(&card->write);
5527         qeth_stop_channel(&card->read);
5528         qdio_free(CARD_DDEV(card));
5529
5530         mutex_unlock(&card->conf_mutex);
5531         return rc;
5532 }
5533
5534 int qeth_set_offline(struct qeth_card *card, const struct qeth_discipline *disc,
5535                      bool resetting)
5536 {
5537         int rc, rc2, rc3;
5538
5539         mutex_lock(&card->conf_mutex);
5540         QETH_CARD_TEXT(card, 3, "setoffl");
5541
5542         if ((!resetting && card->info.hwtrap) || card->info.hwtrap == 2) {
5543                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
5544                 card->info.hwtrap = 1;
5545         }
5546
5547         /* cancel any stalled cmd that might block the rtnl: */
5548         qeth_clear_ipacmd_list(card);
5549
5550         rtnl_lock();
5551         card->info.open_when_online = card->dev->flags & IFF_UP;
5552         dev_close(card->dev);
5553         netif_device_detach(card->dev);
5554         netif_carrier_off(card->dev);
5555         rtnl_unlock();
5556
5557         cancel_work_sync(&card->rx_mode_work);
5558
5559         disc->set_offline(card);
5560
5561         qeth_qdio_clear_card(card, 0);
5562         qeth_drain_output_queues(card);
5563         qeth_clear_working_pool_list(card);
5564         qeth_flush_local_addrs(card);
5565         card->info.promisc_mode = 0;
5566
5567         rc  = qeth_stop_channel(&card->data);
5568         rc2 = qeth_stop_channel(&card->write);
5569         rc3 = qeth_stop_channel(&card->read);
5570         if (!rc)
5571                 rc = (rc2) ? rc2 : rc3;
5572         if (rc)
5573                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
5574         qdio_free(CARD_DDEV(card));
5575
5576         /* let user_space know that device is offline */
5577         kobject_uevent(&card->gdev->dev.kobj, KOBJ_CHANGE);
5578
5579         mutex_unlock(&card->conf_mutex);
5580         return 0;
5581 }
5582 EXPORT_SYMBOL_GPL(qeth_set_offline);
5583
5584 static int qeth_do_reset(void *data)
5585 {
5586         const struct qeth_discipline *disc;
5587         struct qeth_card *card = data;
5588         int rc;
5589
5590         /* Lock-free, other users will block until we are done. */
5591         disc = card->discipline;
5592
5593         QETH_CARD_TEXT(card, 2, "recover1");
5594         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
5595                 return 0;
5596         QETH_CARD_TEXT(card, 2, "recover2");
5597         dev_warn(&card->gdev->dev,
5598                  "A recovery process has been started for the device\n");
5599
5600         qeth_set_offline(card, disc, true);
5601         rc = qeth_set_online(card, disc);
5602         if (!rc) {
5603                 dev_info(&card->gdev->dev,
5604                          "Device successfully recovered!\n");
5605         } else {
5606                 ccwgroup_set_offline(card->gdev);
5607                 dev_warn(&card->gdev->dev,
5608                          "The qeth device driver failed to recover an error on the device\n");
5609         }
5610         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
5611         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
5612         return 0;
5613 }
5614
5615 #if IS_ENABLED(CONFIG_QETH_L3)
5616 static void qeth_l3_rebuild_skb(struct qeth_card *card, struct sk_buff *skb,
5617                                 struct qeth_hdr *hdr)
5618 {
5619         struct af_iucv_trans_hdr *iucv = (struct af_iucv_trans_hdr *) skb->data;
5620         struct qeth_hdr_layer3 *l3_hdr = &hdr->hdr.l3;
5621         struct net_device *dev = skb->dev;
5622
5623         if (IS_IQD(card) && iucv->magic == ETH_P_AF_IUCV) {
5624                 dev_hard_header(skb, dev, ETH_P_AF_IUCV, dev->dev_addr,
5625                                 "FAKELL", skb->len);
5626                 return;
5627         }
5628
5629         if (!(l3_hdr->flags & QETH_HDR_PASSTHRU)) {
5630                 u16 prot = (l3_hdr->flags & QETH_HDR_IPV6) ? ETH_P_IPV6 :
5631                                                              ETH_P_IP;
5632                 unsigned char tg_addr[ETH_ALEN];
5633
5634                 skb_reset_network_header(skb);
5635                 switch (l3_hdr->flags & QETH_HDR_CAST_MASK) {
5636                 case QETH_CAST_MULTICAST:
5637                         if (prot == ETH_P_IP)
5638                                 ip_eth_mc_map(ip_hdr(skb)->daddr, tg_addr);
5639                         else
5640                                 ipv6_eth_mc_map(&ipv6_hdr(skb)->daddr, tg_addr);
5641                         QETH_CARD_STAT_INC(card, rx_multicast);
5642                         break;
5643                 case QETH_CAST_BROADCAST:
5644                         ether_addr_copy(tg_addr, dev->broadcast);
5645                         QETH_CARD_STAT_INC(card, rx_multicast);
5646                         break;
5647                 default:
5648                         if (card->options.sniffer)
5649                                 skb->pkt_type = PACKET_OTHERHOST;
5650                         ether_addr_copy(tg_addr, dev->dev_addr);
5651                 }
5652
5653                 if (l3_hdr->ext_flags & QETH_HDR_EXT_SRC_MAC_ADDR)
5654                         dev_hard_header(skb, dev, prot, tg_addr,
5655                                         &l3_hdr->next_hop.rx.src_mac, skb->len);
5656                 else
5657                         dev_hard_header(skb, dev, prot, tg_addr, "FAKELL",
5658                                         skb->len);
5659         }
5660
5661         /* copy VLAN tag from hdr into skb */
5662         if (!card->options.sniffer &&
5663             (l3_hdr->ext_flags & (QETH_HDR_EXT_VLAN_FRAME |
5664                                   QETH_HDR_EXT_INCLUDE_VLAN_TAG))) {
5665                 u16 tag = (l3_hdr->ext_flags & QETH_HDR_EXT_VLAN_FRAME) ?
5666                                 l3_hdr->vlan_id :
5667                                 l3_hdr->next_hop.rx.vlan_id;
5668
5669                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag);
5670         }
5671 }
5672 #endif
5673
5674 static void qeth_receive_skb(struct qeth_card *card, struct sk_buff *skb,
5675                              struct qeth_hdr *hdr, bool uses_frags)
5676 {
5677         struct napi_struct *napi = &card->napi;
5678         bool is_cso;
5679
5680         switch (hdr->hdr.l2.id) {
5681         case QETH_HEADER_TYPE_OSN:
5682                 skb_push(skb, sizeof(*hdr));
5683                 skb_copy_to_linear_data(skb, hdr, sizeof(*hdr));
5684                 QETH_CARD_STAT_ADD(card, rx_bytes, skb->len);
5685                 QETH_CARD_STAT_INC(card, rx_packets);
5686
5687                 card->osn_info.data_cb(skb);
5688                 return;
5689 #if IS_ENABLED(CONFIG_QETH_L3)
5690         case QETH_HEADER_TYPE_LAYER3:
5691                 qeth_l3_rebuild_skb(card, skb, hdr);
5692                 is_cso = hdr->hdr.l3.ext_flags & QETH_HDR_EXT_CSUM_TRANSP_REQ;
5693                 break;
5694 #endif
5695         case QETH_HEADER_TYPE_LAYER2:
5696                 is_cso = hdr->hdr.l2.flags[1] & QETH_HDR_EXT_CSUM_TRANSP_REQ;
5697                 break;
5698         default:
5699                 /* never happens */
5700                 if (uses_frags)
5701                         napi_free_frags(napi);
5702                 else
5703                         dev_kfree_skb_any(skb);
5704                 return;
5705         }
5706
5707         if (is_cso && (card->dev->features & NETIF_F_RXCSUM)) {
5708                 skb->ip_summed = CHECKSUM_UNNECESSARY;
5709                 QETH_CARD_STAT_INC(card, rx_skb_csum);
5710         } else {
5711                 skb->ip_summed = CHECKSUM_NONE;
5712         }
5713
5714         QETH_CARD_STAT_ADD(card, rx_bytes, skb->len);
5715         QETH_CARD_STAT_INC(card, rx_packets);
5716         if (skb_is_nonlinear(skb)) {
5717                 QETH_CARD_STAT_INC(card, rx_sg_skbs);
5718                 QETH_CARD_STAT_ADD(card, rx_sg_frags,
5719                                    skb_shinfo(skb)->nr_frags);
5720         }
5721
5722         if (uses_frags) {
5723                 napi_gro_frags(napi);
5724         } else {
5725                 skb->protocol = eth_type_trans(skb, skb->dev);
5726                 napi_gro_receive(napi, skb);
5727         }
5728 }
5729
5730 static void qeth_create_skb_frag(struct sk_buff *skb, char *data, int data_len)
5731 {
5732         struct page *page = virt_to_page(data);
5733         unsigned int next_frag;
5734
5735         next_frag = skb_shinfo(skb)->nr_frags;
5736         get_page(page);
5737         skb_add_rx_frag(skb, next_frag, page, offset_in_page(data), data_len,
5738                         data_len);
5739 }
5740
5741 static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale)
5742 {
5743         return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY);
5744 }
5745
5746 static int qeth_extract_skb(struct qeth_card *card,
5747                             struct qeth_qdio_buffer *qethbuffer, u8 *element_no,
5748                             int *__offset)
5749 {
5750         struct qeth_priv *priv = netdev_priv(card->dev);
5751         struct qdio_buffer *buffer = qethbuffer->buffer;
5752         struct napi_struct *napi = &card->napi;
5753         struct qdio_buffer_element *element;
5754         unsigned int linear_len = 0;
5755         bool uses_frags = false;
5756         int offset = *__offset;
5757         bool use_rx_sg = false;
5758         unsigned int headroom;
5759         struct qeth_hdr *hdr;
5760         struct sk_buff *skb;
5761         int skb_len = 0;
5762
5763         element = &buffer->element[*element_no];
5764
5765 next_packet:
5766         /* qeth_hdr must not cross element boundaries */
5767         while (element->length < offset + sizeof(struct qeth_hdr)) {
5768                 if (qeth_is_last_sbale(element))
5769                         return -ENODATA;
5770                 element++;
5771                 offset = 0;
5772         }
5773
5774         hdr = phys_to_virt(element->addr) + offset;
5775         offset += sizeof(*hdr);
5776         skb = NULL;
5777
5778         switch (hdr->hdr.l2.id) {
5779         case QETH_HEADER_TYPE_LAYER2:
5780                 skb_len = hdr->hdr.l2.pkt_length;
5781                 linear_len = ETH_HLEN;
5782                 headroom = 0;
5783                 break;
5784         case QETH_HEADER_TYPE_LAYER3:
5785                 skb_len = hdr->hdr.l3.length;
5786                 if (!IS_LAYER3(card)) {
5787                         QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5788                         goto walk_packet;
5789                 }
5790
5791                 if (hdr->hdr.l3.flags & QETH_HDR_PASSTHRU) {
5792                         linear_len = ETH_HLEN;
5793                         headroom = 0;
5794                         break;
5795                 }
5796
5797                 if (hdr->hdr.l3.flags & QETH_HDR_IPV6)
5798                         linear_len = sizeof(struct ipv6hdr);
5799                 else
5800                         linear_len = sizeof(struct iphdr);
5801                 headroom = ETH_HLEN;
5802                 break;
5803         case QETH_HEADER_TYPE_OSN:
5804                 skb_len = hdr->hdr.osn.pdu_length;
5805                 if (!IS_OSN(card)) {
5806                         QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5807                         goto walk_packet;
5808                 }
5809
5810                 linear_len = skb_len;
5811                 headroom = sizeof(struct qeth_hdr);
5812                 break;
5813         default:
5814                 if (hdr->hdr.l2.id & QETH_HEADER_MASK_INVAL)
5815                         QETH_CARD_STAT_INC(card, rx_frame_errors);
5816                 else
5817                         QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5818
5819                 /* Can't determine packet length, drop the whole buffer. */
5820                 return -EPROTONOSUPPORT;
5821         }
5822
5823         if (skb_len < linear_len) {
5824                 QETH_CARD_STAT_INC(card, rx_dropped_runt);
5825                 goto walk_packet;
5826         }
5827
5828         use_rx_sg = (card->options.cq == QETH_CQ_ENABLED) ||
5829                     (skb_len > READ_ONCE(priv->rx_copybreak) &&
5830                      !atomic_read(&card->force_alloc_skb) &&
5831                      !IS_OSN(card));
5832
5833         if (use_rx_sg) {
5834                 /* QETH_CQ_ENABLED only: */
5835                 if (qethbuffer->rx_skb &&
5836                     skb_tailroom(qethbuffer->rx_skb) >= linear_len + headroom) {
5837                         skb = qethbuffer->rx_skb;
5838                         qethbuffer->rx_skb = NULL;
5839                         goto use_skb;
5840                 }
5841
5842                 skb = napi_get_frags(napi);
5843                 if (!skb) {
5844                         /* -ENOMEM, no point in falling back further. */
5845                         QETH_CARD_STAT_INC(card, rx_dropped_nomem);
5846                         goto walk_packet;
5847                 }
5848
5849                 if (skb_tailroom(skb) >= linear_len + headroom) {
5850                         uses_frags = true;
5851                         goto use_skb;
5852                 }
5853
5854                 netdev_info_once(card->dev,
5855                                  "Insufficient linear space in NAPI frags skb, need %u but have %u\n",
5856                                  linear_len + headroom, skb_tailroom(skb));
5857                 /* Shouldn't happen. Don't optimize, fall back to linear skb. */
5858         }
5859
5860         linear_len = skb_len;
5861         skb = napi_alloc_skb(napi, linear_len + headroom);
5862         if (!skb) {
5863                 QETH_CARD_STAT_INC(card, rx_dropped_nomem);
5864                 goto walk_packet;
5865         }
5866
5867 use_skb:
5868         if (headroom)
5869                 skb_reserve(skb, headroom);
5870 walk_packet:
5871         while (skb_len) {
5872                 int data_len = min(skb_len, (int)(element->length - offset));
5873                 char *data = phys_to_virt(element->addr) + offset;
5874
5875                 skb_len -= data_len;
5876                 offset += data_len;
5877
5878                 /* Extract data from current element: */
5879                 if (skb && data_len) {
5880                         if (linear_len) {
5881                                 unsigned int copy_len;
5882
5883                                 copy_len = min_t(unsigned int, linear_len,
5884                                                  data_len);
5885
5886                                 skb_put_data(skb, data, copy_len);
5887                                 linear_len -= copy_len;
5888                                 data_len -= copy_len;
5889                                 data += copy_len;
5890                         }
5891
5892                         if (data_len)
5893                                 qeth_create_skb_frag(skb, data, data_len);
5894                 }
5895
5896                 /* Step forward to next element: */
5897                 if (skb_len) {
5898                         if (qeth_is_last_sbale(element)) {
5899                                 QETH_CARD_TEXT(card, 4, "unexeob");
5900                                 QETH_CARD_HEX(card, 2, buffer, sizeof(void *));
5901                                 if (skb) {
5902                                         if (uses_frags)
5903                                                 napi_free_frags(napi);
5904                                         else
5905                                                 dev_kfree_skb_any(skb);
5906                                         QETH_CARD_STAT_INC(card,
5907                                                            rx_length_errors);
5908                                 }
5909                                 return -EMSGSIZE;
5910                         }
5911                         element++;
5912                         offset = 0;
5913                 }
5914         }
5915
5916         /* This packet was skipped, go get another one: */
5917         if (!skb)
5918                 goto next_packet;
5919
5920         *element_no = element - &buffer->element[0];
5921         *__offset = offset;
5922
5923         qeth_receive_skb(card, skb, hdr, uses_frags);
5924         return 0;
5925 }
5926
5927 static unsigned int qeth_extract_skbs(struct qeth_card *card, int budget,
5928                                       struct qeth_qdio_buffer *buf, bool *done)
5929 {
5930         unsigned int work_done = 0;
5931
5932         while (budget) {
5933                 if (qeth_extract_skb(card, buf, &card->rx.buf_element,
5934                                      &card->rx.e_offset)) {
5935                         *done = true;
5936                         break;
5937                 }
5938
5939                 work_done++;
5940                 budget--;
5941         }
5942
5943         return work_done;
5944 }
5945
5946 static unsigned int qeth_rx_poll(struct qeth_card *card, int budget)
5947 {
5948         struct qeth_rx *ctx = &card->rx;
5949         unsigned int work_done = 0;
5950
5951         while (budget > 0) {
5952                 struct qeth_qdio_buffer *buffer;
5953                 unsigned int skbs_done = 0;
5954                 bool done = false;
5955
5956                 /* Fetch completed RX buffers: */
5957                 if (!card->rx.b_count) {
5958                         card->rx.qdio_err = 0;
5959                         card->rx.b_count = qdio_get_next_buffers(
5960                                 card->data.ccwdev, 0, &card->rx.b_index,
5961                                 &card->rx.qdio_err);
5962                         if (card->rx.b_count <= 0) {
5963                                 card->rx.b_count = 0;
5964                                 break;
5965                         }
5966                 }
5967
5968                 /* Process one completed RX buffer: */
5969                 buffer = &card->qdio.in_q->bufs[card->rx.b_index];
5970                 if (!(card->rx.qdio_err &&
5971                       qeth_check_qdio_errors(card, buffer->buffer,
5972                                              card->rx.qdio_err, "qinerr")))
5973                         skbs_done = qeth_extract_skbs(card, budget, buffer,
5974                                                       &done);
5975                 else
5976                         done = true;
5977
5978                 work_done += skbs_done;
5979                 budget -= skbs_done;
5980
5981                 if (done) {
5982                         QETH_CARD_STAT_INC(card, rx_bufs);
5983                         qeth_put_buffer_pool_entry(card, buffer->pool_entry);
5984                         buffer->pool_entry = NULL;
5985                         card->rx.b_count--;
5986                         ctx->bufs_refill++;
5987                         ctx->bufs_refill -= qeth_rx_refill_queue(card,
5988                                                                  ctx->bufs_refill);
5989
5990                         /* Step forward to next buffer: */
5991                         card->rx.b_index = QDIO_BUFNR(card->rx.b_index + 1);
5992                         card->rx.buf_element = 0;
5993                         card->rx.e_offset = 0;
5994                 }
5995         }
5996
5997         return work_done;
5998 }
5999
6000 static void qeth_cq_poll(struct qeth_card *card)
6001 {
6002         unsigned int work_done = 0;
6003
6004         while (work_done < QDIO_MAX_BUFFERS_PER_Q) {
6005                 unsigned int start, error;
6006                 int completed;
6007
6008                 completed = qdio_inspect_queue(CARD_DDEV(card), 1, true, &start,
6009                                                &error);
6010                 if (completed <= 0)
6011                         return;
6012
6013                 qeth_qdio_cq_handler(card, error, 1, start, completed);
6014                 work_done += completed;
6015         }
6016 }
6017
6018 int qeth_poll(struct napi_struct *napi, int budget)
6019 {
6020         struct qeth_card *card = container_of(napi, struct qeth_card, napi);
6021         unsigned int work_done;
6022
6023         work_done = qeth_rx_poll(card, budget);
6024
6025         if (card->options.cq == QETH_CQ_ENABLED)
6026                 qeth_cq_poll(card);
6027
6028         if (budget) {
6029                 struct qeth_rx *ctx = &card->rx;
6030
6031                 /* Process any substantial refill backlog: */
6032                 ctx->bufs_refill -= qeth_rx_refill_queue(card, ctx->bufs_refill);
6033
6034                 /* Exhausted the RX budget. Keep IRQ disabled, we get called again. */
6035                 if (work_done >= budget)
6036                         return work_done;
6037         }
6038
6039         if (napi_complete_done(napi, work_done) &&
6040             qdio_start_irq(CARD_DDEV(card)))
6041                 napi_schedule(napi);
6042
6043         return work_done;
6044 }
6045 EXPORT_SYMBOL_GPL(qeth_poll);
6046
6047 static void qeth_iqd_tx_complete(struct qeth_qdio_out_q *queue,
6048                                  unsigned int bidx, unsigned int qdio_error,
6049                                  int budget)
6050 {
6051         struct qeth_qdio_out_buffer *buffer = queue->bufs[bidx];
6052         u8 sflags = buffer->buffer->element[15].sflags;
6053         struct qeth_card *card = queue->card;
6054         bool error = !!qdio_error;
6055
6056         if (qdio_error == QDIO_ERROR_SLSB_PENDING) {
6057                 struct qaob *aob = buffer->aob;
6058
6059                 if (!aob) {
6060                         netdev_WARN_ONCE(card->dev,
6061                                          "Pending TX buffer %#x without QAOB on TX queue %u\n",
6062                                          bidx, queue->queue_no);
6063                         qeth_schedule_recovery(card);
6064                         return;
6065                 }
6066
6067                 QETH_CARD_TEXT_(card, 5, "pel%u", bidx);
6068
6069                 switch (atomic_cmpxchg(&buffer->state,
6070                                        QETH_QDIO_BUF_PRIMED,
6071                                        QETH_QDIO_BUF_PENDING)) {
6072                 case QETH_QDIO_BUF_PRIMED:
6073                         /* We have initial ownership, no QAOB (yet): */
6074                         qeth_notify_skbs(queue, buffer, TX_NOTIFY_PENDING);
6075
6076                         /* Handle race with qeth_qdio_handle_aob(): */
6077                         switch (atomic_xchg(&buffer->state,
6078                                             QETH_QDIO_BUF_NEED_QAOB)) {
6079                         case QETH_QDIO_BUF_PENDING:
6080                                 /* No concurrent QAOB notification. */
6081
6082                                 /* Prepare the queue slot for immediate re-use: */
6083                                 qeth_scrub_qdio_buffer(buffer->buffer, queue->max_elements);
6084                                 if (qeth_alloc_out_buf(queue, bidx,
6085                                                        GFP_ATOMIC)) {
6086                                         QETH_CARD_TEXT(card, 2, "outofbuf");
6087                                         qeth_schedule_recovery(card);
6088                                 }
6089
6090                                 list_add(&buffer->list_entry,
6091                                          &queue->pending_bufs);
6092                                 /* Skip clearing the buffer: */
6093                                 return;
6094                         case QETH_QDIO_BUF_QAOB_OK:
6095                                 qeth_notify_skbs(queue, buffer,
6096                                                  TX_NOTIFY_DELAYED_OK);
6097                                 error = false;
6098                                 break;
6099                         case QETH_QDIO_BUF_QAOB_ERROR:
6100                                 qeth_notify_skbs(queue, buffer,
6101                                                  TX_NOTIFY_DELAYED_GENERALERROR);
6102                                 error = true;
6103                                 break;
6104                         default:
6105                                 WARN_ON_ONCE(1);
6106                         }
6107
6108                         break;
6109                 case QETH_QDIO_BUF_QAOB_OK:
6110                         /* qeth_qdio_handle_aob() already received a QAOB: */
6111                         qeth_notify_skbs(queue, buffer, TX_NOTIFY_OK);
6112                         error = false;
6113                         break;
6114                 case QETH_QDIO_BUF_QAOB_ERROR:
6115                         /* qeth_qdio_handle_aob() already received a QAOB: */
6116                         qeth_notify_skbs(queue, buffer, TX_NOTIFY_GENERALERROR);
6117                         error = true;
6118                         break;
6119                 default:
6120                         WARN_ON_ONCE(1);
6121                 }
6122
6123                 memset(aob, 0, sizeof(*aob));
6124         } else if (card->options.cq == QETH_CQ_ENABLED) {
6125                 qeth_notify_skbs(queue, buffer,
6126                                  qeth_compute_cq_notification(sflags, 0));
6127         }
6128
6129         qeth_clear_output_buffer(queue, buffer, error, budget);
6130 }
6131
6132 static int qeth_tx_poll(struct napi_struct *napi, int budget)
6133 {
6134         struct qeth_qdio_out_q *queue = qeth_napi_to_out_queue(napi);
6135         unsigned int queue_no = queue->queue_no;
6136         struct qeth_card *card = queue->card;
6137         struct net_device *dev = card->dev;
6138         unsigned int work_done = 0;
6139         struct netdev_queue *txq;
6140
6141         txq = netdev_get_tx_queue(dev, qeth_iqd_translate_txq(dev, queue_no));
6142
6143         while (1) {
6144                 unsigned int start, error, i;
6145                 unsigned int packets = 0;
6146                 unsigned int bytes = 0;
6147                 int completed;
6148
6149                 qeth_tx_complete_pending_bufs(card, queue, false, budget);
6150
6151                 if (qeth_out_queue_is_empty(queue)) {
6152                         napi_complete(napi);
6153                         return 0;
6154                 }
6155
6156                 /* Give the CPU a breather: */
6157                 if (work_done >= QDIO_MAX_BUFFERS_PER_Q) {
6158                         QETH_TXQ_STAT_INC(queue, completion_yield);
6159                         if (napi_complete_done(napi, 0))
6160                                 napi_schedule(napi);
6161                         return 0;
6162                 }
6163
6164                 completed = qdio_inspect_queue(CARD_DDEV(card), queue_no, false,
6165                                                &start, &error);
6166                 if (completed <= 0) {
6167                         /* Ensure we see TX completion for pending work: */
6168                         if (napi_complete_done(napi, 0))
6169                                 qeth_tx_arm_timer(queue, QETH_TX_TIMER_USECS);
6170                         return 0;
6171                 }
6172
6173                 for (i = start; i < start + completed; i++) {
6174                         struct qeth_qdio_out_buffer *buffer;
6175                         unsigned int bidx = QDIO_BUFNR(i);
6176
6177                         buffer = queue->bufs[bidx];
6178                         packets += buffer->frames;
6179                         bytes += buffer->bytes;
6180
6181                         qeth_handle_send_error(card, buffer, error);
6182                         qeth_iqd_tx_complete(queue, bidx, error, budget);
6183                 }
6184
6185                 netdev_tx_completed_queue(txq, packets, bytes);
6186                 atomic_sub(completed, &queue->used_buffers);
6187                 work_done += completed;
6188
6189                 /* xmit may have observed the full-condition, but not yet
6190                  * stopped the txq. In which case the code below won't trigger.
6191                  * So before returning, xmit will re-check the txq's fill level
6192                  * and wake it up if needed.
6193                  */
6194                 if (netif_tx_queue_stopped(txq) &&
6195                     !qeth_out_queue_is_full(queue))
6196                         netif_tx_wake_queue(txq);
6197         }
6198 }
6199
6200 static int qeth_setassparms_inspect_rc(struct qeth_ipa_cmd *cmd)
6201 {
6202         if (!cmd->hdr.return_code)
6203                 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
6204         return cmd->hdr.return_code;
6205 }
6206
6207 static int qeth_setassparms_get_caps_cb(struct qeth_card *card,
6208                                         struct qeth_reply *reply,
6209                                         unsigned long data)
6210 {
6211         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6212         struct qeth_ipa_caps *caps = reply->param;
6213
6214         if (qeth_setassparms_inspect_rc(cmd))
6215                 return -EIO;
6216
6217         caps->supported = cmd->data.setassparms.data.caps.supported;
6218         caps->enabled = cmd->data.setassparms.data.caps.enabled;
6219         return 0;
6220 }
6221
6222 int qeth_setassparms_cb(struct qeth_card *card,
6223                         struct qeth_reply *reply, unsigned long data)
6224 {
6225         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6226
6227         QETH_CARD_TEXT(card, 4, "defadpcb");
6228
6229         if (cmd->hdr.return_code)
6230                 return -EIO;
6231
6232         cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
6233         if (cmd->hdr.prot_version == QETH_PROT_IPV4)
6234                 card->options.ipa4.enabled = cmd->hdr.assists.enabled;
6235         if (cmd->hdr.prot_version == QETH_PROT_IPV6)
6236                 card->options.ipa6.enabled = cmd->hdr.assists.enabled;
6237         return 0;
6238 }
6239 EXPORT_SYMBOL_GPL(qeth_setassparms_cb);
6240
6241 struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card,
6242                                                  enum qeth_ipa_funcs ipa_func,
6243                                                  u16 cmd_code,
6244                                                  unsigned int data_length,
6245                                                  enum qeth_prot_versions prot)
6246 {
6247         struct qeth_ipacmd_setassparms *setassparms;
6248         struct qeth_ipacmd_setassparms_hdr *hdr;
6249         struct qeth_cmd_buffer *iob;
6250
6251         QETH_CARD_TEXT(card, 4, "getasscm");
6252         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETASSPARMS, prot,
6253                                  data_length +
6254                                  offsetof(struct qeth_ipacmd_setassparms,
6255                                           data));
6256         if (!iob)
6257                 return NULL;
6258
6259         setassparms = &__ipa_cmd(iob)->data.setassparms;
6260         setassparms->assist_no = ipa_func;
6261
6262         hdr = &setassparms->hdr;
6263         hdr->length = sizeof(*hdr) + data_length;
6264         hdr->command_code = cmd_code;
6265         return iob;
6266 }
6267 EXPORT_SYMBOL_GPL(qeth_get_setassparms_cmd);
6268
6269 int qeth_send_simple_setassparms_prot(struct qeth_card *card,
6270                                       enum qeth_ipa_funcs ipa_func,
6271                                       u16 cmd_code, u32 *data,
6272                                       enum qeth_prot_versions prot)
6273 {
6274         unsigned int length = data ? SETASS_DATA_SIZEOF(flags_32bit) : 0;
6275         struct qeth_cmd_buffer *iob;
6276
6277         QETH_CARD_TEXT_(card, 4, "simassp%i", prot);
6278         iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code, length, prot);
6279         if (!iob)
6280                 return -ENOMEM;
6281
6282         if (data)
6283                 __ipa_cmd(iob)->data.setassparms.data.flags_32bit = *data;
6284         return qeth_send_ipa_cmd(card, iob, qeth_setassparms_cb, NULL);
6285 }
6286 EXPORT_SYMBOL_GPL(qeth_send_simple_setassparms_prot);
6287
6288 static void qeth_unregister_dbf_views(void)
6289 {
6290         int x;
6291
6292         for (x = 0; x < QETH_DBF_INFOS; x++) {
6293                 debug_unregister(qeth_dbf[x].id);
6294                 qeth_dbf[x].id = NULL;
6295         }
6296 }
6297
6298 void qeth_dbf_longtext(debug_info_t *id, int level, char *fmt, ...)
6299 {
6300         char dbf_txt_buf[32];
6301         va_list args;
6302
6303         if (!debug_level_enabled(id, level))
6304                 return;
6305         va_start(args, fmt);
6306         vsnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
6307         va_end(args);
6308         debug_text_event(id, level, dbf_txt_buf);
6309 }
6310 EXPORT_SYMBOL_GPL(qeth_dbf_longtext);
6311
6312 static int qeth_register_dbf_views(void)
6313 {
6314         int ret;
6315         int x;
6316
6317         for (x = 0; x < QETH_DBF_INFOS; x++) {
6318                 /* register the areas */
6319                 qeth_dbf[x].id = debug_register(qeth_dbf[x].name,
6320                                                 qeth_dbf[x].pages,
6321                                                 qeth_dbf[x].areas,
6322                                                 qeth_dbf[x].len);
6323                 if (qeth_dbf[x].id == NULL) {
6324                         qeth_unregister_dbf_views();
6325                         return -ENOMEM;
6326                 }
6327
6328                 /* register a view */
6329                 ret = debug_register_view(qeth_dbf[x].id, qeth_dbf[x].view);
6330                 if (ret) {
6331                         qeth_unregister_dbf_views();
6332                         return ret;
6333                 }
6334
6335                 /* set a passing level */
6336                 debug_set_level(qeth_dbf[x].id, qeth_dbf[x].level);
6337         }
6338
6339         return 0;
6340 }
6341
6342 static DEFINE_MUTEX(qeth_mod_mutex);    /* for synchronized module loading */
6343
6344 int qeth_setup_discipline(struct qeth_card *card,
6345                           enum qeth_discipline_id discipline)
6346 {
6347         int rc;
6348
6349         mutex_lock(&qeth_mod_mutex);
6350         switch (discipline) {
6351         case QETH_DISCIPLINE_LAYER3:
6352                 card->discipline = try_then_request_module(
6353                         symbol_get(qeth_l3_discipline), "qeth_l3");
6354                 break;
6355         case QETH_DISCIPLINE_LAYER2:
6356                 card->discipline = try_then_request_module(
6357                         symbol_get(qeth_l2_discipline), "qeth_l2");
6358                 break;
6359         default:
6360                 break;
6361         }
6362         mutex_unlock(&qeth_mod_mutex);
6363
6364         if (!card->discipline) {
6365                 dev_err(&card->gdev->dev, "There is no kernel module to "
6366                         "support discipline %d\n", discipline);
6367                 return -EINVAL;
6368         }
6369
6370         rc = card->discipline->setup(card->gdev);
6371         if (rc) {
6372                 if (discipline == QETH_DISCIPLINE_LAYER2)
6373                         symbol_put(qeth_l2_discipline);
6374                 else
6375                         symbol_put(qeth_l3_discipline);
6376                 card->discipline = NULL;
6377
6378                 return rc;
6379         }
6380
6381         card->options.layer = discipline;
6382         return 0;
6383 }
6384
6385 void qeth_remove_discipline(struct qeth_card *card)
6386 {
6387         card->discipline->remove(card->gdev);
6388
6389         if (IS_LAYER2(card))
6390                 symbol_put(qeth_l2_discipline);
6391         else
6392                 symbol_put(qeth_l3_discipline);
6393         card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
6394         card->discipline = NULL;
6395 }
6396
6397 const struct device_type qeth_generic_devtype = {
6398         .name = "qeth_generic",
6399 };
6400 EXPORT_SYMBOL_GPL(qeth_generic_devtype);
6401
6402 static const struct device_type qeth_osn_devtype = {
6403         .name = "qeth_osn",
6404 };
6405
6406 #define DBF_NAME_LEN    20
6407
6408 struct qeth_dbf_entry {
6409         char dbf_name[DBF_NAME_LEN];
6410         debug_info_t *dbf_info;
6411         struct list_head dbf_list;
6412 };
6413
6414 static LIST_HEAD(qeth_dbf_list);
6415 static DEFINE_MUTEX(qeth_dbf_list_mutex);
6416
6417 static debug_info_t *qeth_get_dbf_entry(char *name)
6418 {
6419         struct qeth_dbf_entry *entry;
6420         debug_info_t *rc = NULL;
6421
6422         mutex_lock(&qeth_dbf_list_mutex);
6423         list_for_each_entry(entry, &qeth_dbf_list, dbf_list) {
6424                 if (strcmp(entry->dbf_name, name) == 0) {
6425                         rc = entry->dbf_info;
6426                         break;
6427                 }
6428         }
6429         mutex_unlock(&qeth_dbf_list_mutex);
6430         return rc;
6431 }
6432
6433 static int qeth_add_dbf_entry(struct qeth_card *card, char *name)
6434 {
6435         struct qeth_dbf_entry *new_entry;
6436
6437         card->debug = debug_register(name, 2, 1, 8);
6438         if (!card->debug) {
6439                 QETH_DBF_TEXT_(SETUP, 2, "%s", "qcdbf");
6440                 goto err;
6441         }
6442         if (debug_register_view(card->debug, &debug_hex_ascii_view))
6443                 goto err_dbg;
6444         new_entry = kzalloc(sizeof(struct qeth_dbf_entry), GFP_KERNEL);
6445         if (!new_entry)
6446                 goto err_dbg;
6447         strncpy(new_entry->dbf_name, name, DBF_NAME_LEN);
6448         new_entry->dbf_info = card->debug;
6449         mutex_lock(&qeth_dbf_list_mutex);
6450         list_add(&new_entry->dbf_list, &qeth_dbf_list);
6451         mutex_unlock(&qeth_dbf_list_mutex);
6452
6453         return 0;
6454
6455 err_dbg:
6456         debug_unregister(card->debug);
6457 err:
6458         return -ENOMEM;
6459 }
6460
6461 static void qeth_clear_dbf_list(void)
6462 {
6463         struct qeth_dbf_entry *entry, *tmp;
6464
6465         mutex_lock(&qeth_dbf_list_mutex);
6466         list_for_each_entry_safe(entry, tmp, &qeth_dbf_list, dbf_list) {
6467                 list_del(&entry->dbf_list);
6468                 debug_unregister(entry->dbf_info);
6469                 kfree(entry);
6470         }
6471         mutex_unlock(&qeth_dbf_list_mutex);
6472 }
6473
6474 static struct net_device *qeth_alloc_netdev(struct qeth_card *card)
6475 {
6476         struct net_device *dev;
6477         struct qeth_priv *priv;
6478
6479         switch (card->info.type) {
6480         case QETH_CARD_TYPE_IQD:
6481                 dev = alloc_netdev_mqs(sizeof(*priv), "hsi%d", NET_NAME_UNKNOWN,
6482                                        ether_setup, QETH_MAX_OUT_QUEUES, 1);
6483                 break;
6484         case QETH_CARD_TYPE_OSM:
6485                 dev = alloc_etherdev(sizeof(*priv));
6486                 break;
6487         case QETH_CARD_TYPE_OSN:
6488                 dev = alloc_netdev(sizeof(*priv), "osn%d", NET_NAME_UNKNOWN,
6489                                    ether_setup);
6490                 break;
6491         default:
6492                 dev = alloc_etherdev_mqs(sizeof(*priv), QETH_MAX_OUT_QUEUES, 1);
6493         }
6494
6495         if (!dev)
6496                 return NULL;
6497
6498         priv = netdev_priv(dev);
6499         priv->rx_copybreak = QETH_RX_COPYBREAK;
6500         priv->tx_wanted_queues = IS_IQD(card) ? QETH_IQD_MIN_TXQ : 1;
6501
6502         dev->ml_priv = card;
6503         dev->watchdog_timeo = QETH_TX_TIMEOUT;
6504         dev->min_mtu = IS_OSN(card) ? 64 : 576;
6505          /* initialized when device first goes online: */
6506         dev->max_mtu = 0;
6507         dev->mtu = 0;
6508         SET_NETDEV_DEV(dev, &card->gdev->dev);
6509         netif_carrier_off(dev);
6510
6511         if (IS_OSN(card)) {
6512                 dev->ethtool_ops = &qeth_osn_ethtool_ops;
6513         } else {
6514                 dev->ethtool_ops = &qeth_ethtool_ops;
6515                 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
6516                 dev->hw_features |= NETIF_F_SG;
6517                 dev->vlan_features |= NETIF_F_SG;
6518                 if (IS_IQD(card))
6519                         dev->features |= NETIF_F_SG;
6520         }
6521
6522         return dev;
6523 }
6524
6525 struct net_device *qeth_clone_netdev(struct net_device *orig)
6526 {
6527         struct net_device *clone = qeth_alloc_netdev(orig->ml_priv);
6528
6529         if (!clone)
6530                 return NULL;
6531
6532         clone->dev_port = orig->dev_port;
6533         return clone;
6534 }
6535
6536 static int qeth_core_probe_device(struct ccwgroup_device *gdev)
6537 {
6538         struct qeth_card *card;
6539         struct device *dev;
6540         int rc;
6541         enum qeth_discipline_id enforced_disc;
6542         char dbf_name[DBF_NAME_LEN];
6543
6544         QETH_DBF_TEXT(SETUP, 2, "probedev");
6545
6546         dev = &gdev->dev;
6547         if (!get_device(dev))
6548                 return -ENODEV;
6549
6550         QETH_DBF_TEXT_(SETUP, 2, "%s", dev_name(&gdev->dev));
6551
6552         card = qeth_alloc_card(gdev);
6553         if (!card) {
6554                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM);
6555                 rc = -ENOMEM;
6556                 goto err_dev;
6557         }
6558
6559         snprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
6560                 dev_name(&gdev->dev));
6561         card->debug = qeth_get_dbf_entry(dbf_name);
6562         if (!card->debug) {
6563                 rc = qeth_add_dbf_entry(card, dbf_name);
6564                 if (rc)
6565                         goto err_card;
6566         }
6567
6568         qeth_setup_card(card);
6569         card->dev = qeth_alloc_netdev(card);
6570         if (!card->dev) {
6571                 rc = -ENOMEM;
6572                 goto err_card;
6573         }
6574
6575         qeth_determine_capabilities(card);
6576         qeth_set_blkt_defaults(card);
6577
6578         card->qdio.no_out_queues = card->dev->num_tx_queues;
6579         rc = qeth_update_from_chp_desc(card);
6580         if (rc)
6581                 goto err_chp_desc;
6582
6583         if (IS_OSN(card))
6584                 gdev->dev.groups = qeth_osn_dev_groups;
6585         else
6586                 gdev->dev.groups = qeth_dev_groups;
6587
6588         enforced_disc = qeth_enforce_discipline(card);
6589         switch (enforced_disc) {
6590         case QETH_DISCIPLINE_UNDETERMINED:
6591                 gdev->dev.type = &qeth_generic_devtype;
6592                 break;
6593         default:
6594                 card->info.layer_enforced = true;
6595                 /* It's so early that we don't need the discipline_mutex yet. */
6596                 rc = qeth_setup_discipline(card, enforced_disc);
6597                 if (rc)
6598                         goto err_setup_disc;
6599
6600                 gdev->dev.type = IS_OSN(card) ? &qeth_osn_devtype :
6601                                                 card->discipline->devtype;
6602                 break;
6603         }
6604
6605         return 0;
6606
6607 err_setup_disc:
6608 err_chp_desc:
6609         free_netdev(card->dev);
6610 err_card:
6611         qeth_core_free_card(card);
6612 err_dev:
6613         put_device(dev);
6614         return rc;
6615 }
6616
6617 static void qeth_core_remove_device(struct ccwgroup_device *gdev)
6618 {
6619         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6620
6621         QETH_CARD_TEXT(card, 2, "removedv");
6622
6623         mutex_lock(&card->discipline_mutex);
6624         if (card->discipline)
6625                 qeth_remove_discipline(card);
6626         mutex_unlock(&card->discipline_mutex);
6627
6628         qeth_free_qdio_queues(card);
6629
6630         free_netdev(card->dev);
6631         qeth_core_free_card(card);
6632         put_device(&gdev->dev);
6633 }
6634
6635 static int qeth_core_set_online(struct ccwgroup_device *gdev)
6636 {
6637         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6638         int rc = 0;
6639         enum qeth_discipline_id def_discipline;
6640
6641         mutex_lock(&card->discipline_mutex);
6642         if (!card->discipline) {
6643                 def_discipline = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
6644                                                 QETH_DISCIPLINE_LAYER2;
6645                 rc = qeth_setup_discipline(card, def_discipline);
6646                 if (rc)
6647                         goto err;
6648         }
6649
6650         rc = qeth_set_online(card, card->discipline);
6651
6652 err:
6653         mutex_unlock(&card->discipline_mutex);
6654         return rc;
6655 }
6656
6657 static int qeth_core_set_offline(struct ccwgroup_device *gdev)
6658 {
6659         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6660         int rc;
6661
6662         mutex_lock(&card->discipline_mutex);
6663         rc = qeth_set_offline(card, card->discipline, false);
6664         mutex_unlock(&card->discipline_mutex);
6665
6666         return rc;
6667 }
6668
6669 static void qeth_core_shutdown(struct ccwgroup_device *gdev)
6670 {
6671         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6672
6673         qeth_set_allowed_threads(card, 0, 1);
6674         if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
6675                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
6676         qeth_qdio_clear_card(card, 0);
6677         qeth_drain_output_queues(card);
6678         qdio_free(CARD_DDEV(card));
6679 }
6680
6681 static ssize_t group_store(struct device_driver *ddrv, const char *buf,
6682                            size_t count)
6683 {
6684         int err;
6685
6686         err = ccwgroup_create_dev(qeth_core_root_dev, to_ccwgroupdrv(ddrv), 3,
6687                                   buf);
6688
6689         return err ? err : count;
6690 }
6691 static DRIVER_ATTR_WO(group);
6692
6693 static struct attribute *qeth_drv_attrs[] = {
6694         &driver_attr_group.attr,
6695         NULL,
6696 };
6697 static struct attribute_group qeth_drv_attr_group = {
6698         .attrs = qeth_drv_attrs,
6699 };
6700 static const struct attribute_group *qeth_drv_attr_groups[] = {
6701         &qeth_drv_attr_group,
6702         NULL,
6703 };
6704
6705 static struct ccwgroup_driver qeth_core_ccwgroup_driver = {
6706         .driver = {
6707                 .groups = qeth_drv_attr_groups,
6708                 .owner = THIS_MODULE,
6709                 .name = "qeth",
6710         },
6711         .ccw_driver = &qeth_ccw_driver,
6712         .setup = qeth_core_probe_device,
6713         .remove = qeth_core_remove_device,
6714         .set_online = qeth_core_set_online,
6715         .set_offline = qeth_core_set_offline,
6716         .shutdown = qeth_core_shutdown,
6717 };
6718
6719 struct qeth_card *qeth_get_card_by_busid(char *bus_id)
6720 {
6721         struct ccwgroup_device *gdev;
6722         struct qeth_card *card;
6723
6724         gdev = get_ccwgroupdev_by_busid(&qeth_core_ccwgroup_driver, bus_id);
6725         if (!gdev)
6726                 return NULL;
6727
6728         card = dev_get_drvdata(&gdev->dev);
6729         put_device(&gdev->dev);
6730         return card;
6731 }
6732 EXPORT_SYMBOL_GPL(qeth_get_card_by_busid);
6733
6734 int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
6735 {
6736         struct qeth_card *card = dev->ml_priv;
6737         struct mii_ioctl_data *mii_data;
6738         int rc = 0;
6739
6740         switch (cmd) {
6741         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
6742                 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
6743                 break;
6744         case SIOC_QETH_GET_CARD_TYPE:
6745                 if ((IS_OSD(card) || IS_OSM(card) || IS_OSX(card)) &&
6746                     !IS_VM_NIC(card))
6747                         return 1;
6748                 return 0;
6749         case SIOCGMIIPHY:
6750                 mii_data = if_mii(rq);
6751                 mii_data->phy_id = 0;
6752                 break;
6753         case SIOCGMIIREG:
6754                 mii_data = if_mii(rq);
6755                 if (mii_data->phy_id != 0)
6756                         rc = -EINVAL;
6757                 else
6758                         mii_data->val_out = qeth_mdio_read(dev,
6759                                 mii_data->phy_id, mii_data->reg_num);
6760                 break;
6761         case SIOC_QETH_QUERY_OAT:
6762                 rc = qeth_query_oat_command(card, rq->ifr_ifru.ifru_data);
6763                 break;
6764         default:
6765                 if (card->discipline->do_ioctl)
6766                         rc = card->discipline->do_ioctl(dev, rq, cmd);
6767                 else
6768                         rc = -EOPNOTSUPP;
6769         }
6770         if (rc)
6771                 QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
6772         return rc;
6773 }
6774 EXPORT_SYMBOL_GPL(qeth_do_ioctl);
6775
6776 static int qeth_start_csum_cb(struct qeth_card *card, struct qeth_reply *reply,
6777                               unsigned long data)
6778 {
6779         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6780         u32 *features = reply->param;
6781
6782         if (qeth_setassparms_inspect_rc(cmd))
6783                 return -EIO;
6784
6785         *features = cmd->data.setassparms.data.flags_32bit;
6786         return 0;
6787 }
6788
6789 static int qeth_set_csum_off(struct qeth_card *card, enum qeth_ipa_funcs cstype,
6790                              enum qeth_prot_versions prot)
6791 {
6792         return qeth_send_simple_setassparms_prot(card, cstype, IPA_CMD_ASS_STOP,
6793                                                  NULL, prot);
6794 }
6795
6796 static int qeth_set_csum_on(struct qeth_card *card, enum qeth_ipa_funcs cstype,
6797                             enum qeth_prot_versions prot, u8 *lp2lp)
6798 {
6799         u32 required_features = QETH_IPA_CHECKSUM_UDP | QETH_IPA_CHECKSUM_TCP;
6800         struct qeth_cmd_buffer *iob;
6801         struct qeth_ipa_caps caps;
6802         u32 features;
6803         int rc;
6804
6805         /* some L3 HW requires combined L3+L4 csum offload: */
6806         if (IS_LAYER3(card) && prot == QETH_PROT_IPV4 &&
6807             cstype == IPA_OUTBOUND_CHECKSUM)
6808                 required_features |= QETH_IPA_CHECKSUM_IP_HDR;
6809
6810         iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_START, 0,
6811                                        prot);
6812         if (!iob)
6813                 return -ENOMEM;
6814
6815         rc = qeth_send_ipa_cmd(card, iob, qeth_start_csum_cb, &features);
6816         if (rc)
6817                 return rc;
6818
6819         if ((required_features & features) != required_features) {
6820                 qeth_set_csum_off(card, cstype, prot);
6821                 return -EOPNOTSUPP;
6822         }
6823
6824         iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_ENABLE,
6825                                        SETASS_DATA_SIZEOF(flags_32bit),
6826                                        prot);
6827         if (!iob) {
6828                 qeth_set_csum_off(card, cstype, prot);
6829                 return -ENOMEM;
6830         }
6831
6832         if (features & QETH_IPA_CHECKSUM_LP2LP)
6833                 required_features |= QETH_IPA_CHECKSUM_LP2LP;
6834         __ipa_cmd(iob)->data.setassparms.data.flags_32bit = required_features;
6835         rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6836         if (rc) {
6837                 qeth_set_csum_off(card, cstype, prot);
6838                 return rc;
6839         }
6840
6841         if (!qeth_ipa_caps_supported(&caps, required_features) ||
6842             !qeth_ipa_caps_enabled(&caps, required_features)) {
6843                 qeth_set_csum_off(card, cstype, prot);
6844                 return -EOPNOTSUPP;
6845         }
6846
6847         dev_info(&card->gdev->dev, "HW Checksumming (%sbound IPv%d) enabled\n",
6848                  cstype == IPA_INBOUND_CHECKSUM ? "in" : "out", prot);
6849
6850         if (lp2lp)
6851                 *lp2lp = qeth_ipa_caps_enabled(&caps, QETH_IPA_CHECKSUM_LP2LP);
6852
6853         return 0;
6854 }
6855
6856 static int qeth_set_ipa_csum(struct qeth_card *card, bool on, int cstype,
6857                              enum qeth_prot_versions prot, u8 *lp2lp)
6858 {
6859         return on ? qeth_set_csum_on(card, cstype, prot, lp2lp) :
6860                     qeth_set_csum_off(card, cstype, prot);
6861 }
6862
6863 static int qeth_start_tso_cb(struct qeth_card *card, struct qeth_reply *reply,
6864                              unsigned long data)
6865 {
6866         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6867         struct qeth_tso_start_data *tso_data = reply->param;
6868
6869         if (qeth_setassparms_inspect_rc(cmd))
6870                 return -EIO;
6871
6872         tso_data->mss = cmd->data.setassparms.data.tso.mss;
6873         tso_data->supported = cmd->data.setassparms.data.tso.supported;
6874         return 0;
6875 }
6876
6877 static int qeth_set_tso_off(struct qeth_card *card,
6878                             enum qeth_prot_versions prot)
6879 {
6880         return qeth_send_simple_setassparms_prot(card, IPA_OUTBOUND_TSO,
6881                                                  IPA_CMD_ASS_STOP, NULL, prot);
6882 }
6883
6884 static int qeth_set_tso_on(struct qeth_card *card,
6885                            enum qeth_prot_versions prot)
6886 {
6887         struct qeth_tso_start_data tso_data;
6888         struct qeth_cmd_buffer *iob;
6889         struct qeth_ipa_caps caps;
6890         int rc;
6891
6892         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6893                                        IPA_CMD_ASS_START, 0, prot);
6894         if (!iob)
6895                 return -ENOMEM;
6896
6897         rc = qeth_send_ipa_cmd(card, iob, qeth_start_tso_cb, &tso_data);
6898         if (rc)
6899                 return rc;
6900
6901         if (!tso_data.mss || !(tso_data.supported & QETH_IPA_LARGE_SEND_TCP)) {
6902                 qeth_set_tso_off(card, prot);
6903                 return -EOPNOTSUPP;
6904         }
6905
6906         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6907                                        IPA_CMD_ASS_ENABLE,
6908                                        SETASS_DATA_SIZEOF(caps), prot);
6909         if (!iob) {
6910                 qeth_set_tso_off(card, prot);
6911                 return -ENOMEM;
6912         }
6913
6914         /* enable TSO capability */
6915         __ipa_cmd(iob)->data.setassparms.data.caps.enabled =
6916                 QETH_IPA_LARGE_SEND_TCP;
6917         rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6918         if (rc) {
6919                 qeth_set_tso_off(card, prot);
6920                 return rc;
6921         }
6922
6923         if (!qeth_ipa_caps_supported(&caps, QETH_IPA_LARGE_SEND_TCP) ||
6924             !qeth_ipa_caps_enabled(&caps, QETH_IPA_LARGE_SEND_TCP)) {
6925                 qeth_set_tso_off(card, prot);
6926                 return -EOPNOTSUPP;
6927         }
6928
6929         dev_info(&card->gdev->dev, "TSOv%u enabled (MSS: %u)\n", prot,
6930                  tso_data.mss);
6931         return 0;
6932 }
6933
6934 static int qeth_set_ipa_tso(struct qeth_card *card, bool on,
6935                             enum qeth_prot_versions prot)
6936 {
6937         return on ? qeth_set_tso_on(card, prot) : qeth_set_tso_off(card, prot);
6938 }
6939
6940 static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on)
6941 {
6942         int rc_ipv4 = (on) ? -EOPNOTSUPP : 0;
6943         int rc_ipv6;
6944
6945         if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
6946                 rc_ipv4 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6947                                             QETH_PROT_IPV4, NULL);
6948         if (!qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6949                 /* no/one Offload Assist available, so the rc is trivial */
6950                 return rc_ipv4;
6951
6952         rc_ipv6 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6953                                     QETH_PROT_IPV6, NULL);
6954
6955         if (on)
6956                 /* enable: success if any Assist is active */
6957                 return (rc_ipv6) ? rc_ipv4 : 0;
6958
6959         /* disable: failure if any Assist is still active */
6960         return (rc_ipv6) ? rc_ipv6 : rc_ipv4;
6961 }
6962
6963 /**
6964  * qeth_enable_hw_features() - (Re-)Enable HW functions for device features
6965  * @dev:        a net_device
6966  */
6967 void qeth_enable_hw_features(struct net_device *dev)
6968 {
6969         struct qeth_card *card = dev->ml_priv;
6970         netdev_features_t features;
6971
6972         features = dev->features;
6973         /* force-off any feature that might need an IPA sequence.
6974          * netdev_update_features() will restart them.
6975          */
6976         dev->features &= ~dev->hw_features;
6977         /* toggle VLAN filter, so that VIDs are re-programmed: */
6978         if (IS_LAYER2(card) && IS_VM_NIC(card)) {
6979                 dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
6980                 dev->wanted_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
6981         }
6982         netdev_update_features(dev);
6983         if (features != dev->features)
6984                 dev_warn(&card->gdev->dev,
6985                          "Device recovery failed to restore all offload features\n");
6986 }
6987 EXPORT_SYMBOL_GPL(qeth_enable_hw_features);
6988
6989 static void qeth_check_restricted_features(struct qeth_card *card,
6990                                            netdev_features_t changed,
6991                                            netdev_features_t actual)
6992 {
6993         netdev_features_t ipv6_features = NETIF_F_TSO6;
6994         netdev_features_t ipv4_features = NETIF_F_TSO;
6995
6996         if (!card->info.has_lp2lp_cso_v6)
6997                 ipv6_features |= NETIF_F_IPV6_CSUM;
6998         if (!card->info.has_lp2lp_cso_v4)
6999                 ipv4_features |= NETIF_F_IP_CSUM;
7000
7001         if ((changed & ipv6_features) && !(actual & ipv6_features))
7002                 qeth_flush_local_addrs6(card);
7003         if ((changed & ipv4_features) && !(actual & ipv4_features))
7004                 qeth_flush_local_addrs4(card);
7005 }
7006
7007 int qeth_set_features(struct net_device *dev, netdev_features_t features)
7008 {
7009         struct qeth_card *card = dev->ml_priv;
7010         netdev_features_t changed = dev->features ^ features;
7011         int rc = 0;
7012
7013         QETH_CARD_TEXT(card, 2, "setfeat");
7014         QETH_CARD_HEX(card, 2, &features, sizeof(features));
7015
7016         if ((changed & NETIF_F_IP_CSUM)) {
7017                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IP_CSUM,
7018                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV4,
7019                                        &card->info.has_lp2lp_cso_v4);
7020                 if (rc)
7021                         changed ^= NETIF_F_IP_CSUM;
7022         }
7023         if (changed & NETIF_F_IPV6_CSUM) {
7024                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IPV6_CSUM,
7025                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV6,
7026                                        &card->info.has_lp2lp_cso_v6);
7027                 if (rc)
7028                         changed ^= NETIF_F_IPV6_CSUM;
7029         }
7030         if (changed & NETIF_F_RXCSUM) {
7031                 rc = qeth_set_ipa_rx_csum(card, features & NETIF_F_RXCSUM);
7032                 if (rc)
7033                         changed ^= NETIF_F_RXCSUM;
7034         }
7035         if (changed & NETIF_F_TSO) {
7036                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO,
7037                                       QETH_PROT_IPV4);
7038                 if (rc)
7039                         changed ^= NETIF_F_TSO;
7040         }
7041         if (changed & NETIF_F_TSO6) {
7042                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO6,
7043                                       QETH_PROT_IPV6);
7044                 if (rc)
7045                         changed ^= NETIF_F_TSO6;
7046         }
7047
7048         qeth_check_restricted_features(card, dev->features ^ features,
7049                                        dev->features ^ changed);
7050
7051         /* everything changed successfully? */
7052         if ((dev->features ^ features) == changed)
7053                 return 0;
7054         /* something went wrong. save changed features and return error */
7055         dev->features ^= changed;
7056         return -EIO;
7057 }
7058 EXPORT_SYMBOL_GPL(qeth_set_features);
7059
7060 netdev_features_t qeth_fix_features(struct net_device *dev,
7061                                     netdev_features_t features)
7062 {
7063         struct qeth_card *card = dev->ml_priv;
7064
7065         QETH_CARD_TEXT(card, 2, "fixfeat");
7066         if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM))
7067                 features &= ~NETIF_F_IP_CSUM;
7068         if (!qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6))
7069                 features &= ~NETIF_F_IPV6_CSUM;
7070         if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM) &&
7071             !qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
7072                 features &= ~NETIF_F_RXCSUM;
7073         if (!qeth_is_supported(card, IPA_OUTBOUND_TSO))
7074                 features &= ~NETIF_F_TSO;
7075         if (!qeth_is_supported6(card, IPA_OUTBOUND_TSO))
7076                 features &= ~NETIF_F_TSO6;
7077
7078         QETH_CARD_HEX(card, 2, &features, sizeof(features));
7079         return features;
7080 }
7081 EXPORT_SYMBOL_GPL(qeth_fix_features);
7082
7083 netdev_features_t qeth_features_check(struct sk_buff *skb,
7084                                       struct net_device *dev,
7085                                       netdev_features_t features)
7086 {
7087         struct qeth_card *card = dev->ml_priv;
7088
7089         /* Traffic with local next-hop is not eligible for some offloads: */
7090         if (skb->ip_summed == CHECKSUM_PARTIAL &&
7091             READ_ONCE(card->options.isolation) != ISOLATION_MODE_FWD) {
7092                 netdev_features_t restricted = 0;
7093
7094                 if (skb_is_gso(skb) && !netif_needs_gso(skb, features))
7095                         restricted |= NETIF_F_ALL_TSO;
7096
7097                 switch (vlan_get_protocol(skb)) {
7098                 case htons(ETH_P_IP):
7099                         if (!card->info.has_lp2lp_cso_v4)
7100                                 restricted |= NETIF_F_IP_CSUM;
7101
7102                         if (restricted && qeth_next_hop_is_local_v4(card, skb))
7103                                 features &= ~restricted;
7104                         break;
7105                 case htons(ETH_P_IPV6):
7106                         if (!card->info.has_lp2lp_cso_v6)
7107                                 restricted |= NETIF_F_IPV6_CSUM;
7108
7109                         if (restricted && qeth_next_hop_is_local_v6(card, skb))
7110                                 features &= ~restricted;
7111                         break;
7112                 default:
7113                         break;
7114                 }
7115         }
7116
7117         /* GSO segmentation builds skbs with
7118          *      a (small) linear part for the headers, and
7119          *      page frags for the data.
7120          * Compared to a linear skb, the header-only part consumes an
7121          * additional buffer element. This reduces buffer utilization, and
7122          * hurts throughput. So compress small segments into one element.
7123          */
7124         if (netif_needs_gso(skb, features)) {
7125                 /* match skb_segment(): */
7126                 unsigned int doffset = skb->data - skb_mac_header(skb);
7127                 unsigned int hsize = skb_shinfo(skb)->gso_size;
7128                 unsigned int hroom = skb_headroom(skb);
7129
7130                 /* linearize only if resulting skb allocations are order-0: */
7131                 if (SKB_DATA_ALIGN(hroom + doffset + hsize) <= SKB_MAX_HEAD(0))
7132                         features &= ~NETIF_F_SG;
7133         }
7134
7135         return vlan_features_check(skb, features);
7136 }
7137 EXPORT_SYMBOL_GPL(qeth_features_check);
7138
7139 void qeth_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
7140 {
7141         struct qeth_card *card = dev->ml_priv;
7142         struct qeth_qdio_out_q *queue;
7143         unsigned int i;
7144
7145         QETH_CARD_TEXT(card, 5, "getstat");
7146
7147         stats->rx_packets = card->stats.rx_packets;
7148         stats->rx_bytes = card->stats.rx_bytes;
7149         stats->rx_errors = card->stats.rx_length_errors +
7150                            card->stats.rx_frame_errors +
7151                            card->stats.rx_fifo_errors;
7152         stats->rx_dropped = card->stats.rx_dropped_nomem +
7153                             card->stats.rx_dropped_notsupp +
7154                             card->stats.rx_dropped_runt;
7155         stats->multicast = card->stats.rx_multicast;
7156         stats->rx_length_errors = card->stats.rx_length_errors;
7157         stats->rx_frame_errors = card->stats.rx_frame_errors;
7158         stats->rx_fifo_errors = card->stats.rx_fifo_errors;
7159
7160         for (i = 0; i < card->qdio.no_out_queues; i++) {
7161                 queue = card->qdio.out_qs[i];
7162
7163                 stats->tx_packets += queue->stats.tx_packets;
7164                 stats->tx_bytes += queue->stats.tx_bytes;
7165                 stats->tx_errors += queue->stats.tx_errors;
7166                 stats->tx_dropped += queue->stats.tx_dropped;
7167         }
7168 }
7169 EXPORT_SYMBOL_GPL(qeth_get_stats64);
7170
7171 #define TC_IQD_UCAST   0
7172 static void qeth_iqd_set_prio_tc_map(struct net_device *dev,
7173                                      unsigned int ucast_txqs)
7174 {
7175         unsigned int prio;
7176
7177         /* IQD requires mcast traffic to be placed on a dedicated queue, and
7178          * qeth_iqd_select_queue() deals with this.
7179          * For unicast traffic, we defer the queue selection to the stack.
7180          * By installing a trivial prio map that spans over only the unicast
7181          * queues, we can encourage the stack to spread the ucast traffic evenly
7182          * without selecting the mcast queue.
7183          */
7184
7185         /* One traffic class, spanning over all active ucast queues: */
7186         netdev_set_num_tc(dev, 1);
7187         netdev_set_tc_queue(dev, TC_IQD_UCAST, ucast_txqs,
7188                             QETH_IQD_MIN_UCAST_TXQ);
7189
7190         /* Map all priorities to this traffic class: */
7191         for (prio = 0; prio <= TC_BITMASK; prio++)
7192                 netdev_set_prio_tc_map(dev, prio, TC_IQD_UCAST);
7193 }
7194
7195 int qeth_set_real_num_tx_queues(struct qeth_card *card, unsigned int count)
7196 {
7197         struct net_device *dev = card->dev;
7198         int rc;
7199
7200         /* Per netif_setup_tc(), adjust the mapping first: */
7201         if (IS_IQD(card))
7202                 qeth_iqd_set_prio_tc_map(dev, count - 1);
7203
7204         rc = netif_set_real_num_tx_queues(dev, count);
7205
7206         if (rc && IS_IQD(card))
7207                 qeth_iqd_set_prio_tc_map(dev, dev->real_num_tx_queues - 1);
7208
7209         return rc;
7210 }
7211 EXPORT_SYMBOL_GPL(qeth_set_real_num_tx_queues);
7212
7213 u16 qeth_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
7214                           u8 cast_type, struct net_device *sb_dev)
7215 {
7216         u16 txq;
7217
7218         if (cast_type != RTN_UNICAST)
7219                 return QETH_IQD_MCAST_TXQ;
7220         if (dev->real_num_tx_queues == QETH_IQD_MIN_TXQ)
7221                 return QETH_IQD_MIN_UCAST_TXQ;
7222
7223         txq = netdev_pick_tx(dev, skb, sb_dev);
7224         return (txq == QETH_IQD_MCAST_TXQ) ? QETH_IQD_MIN_UCAST_TXQ : txq;
7225 }
7226 EXPORT_SYMBOL_GPL(qeth_iqd_select_queue);
7227
7228 int qeth_open(struct net_device *dev)
7229 {
7230         struct qeth_card *card = dev->ml_priv;
7231
7232         QETH_CARD_TEXT(card, 4, "qethopen");
7233
7234         card->data.state = CH_STATE_UP;
7235         netif_tx_start_all_queues(dev);
7236
7237         local_bh_disable();
7238         if (IS_IQD(card)) {
7239                 struct qeth_qdio_out_q *queue;
7240                 unsigned int i;
7241
7242                 qeth_for_each_output_queue(card, queue, i) {
7243                         netif_tx_napi_add(dev, &queue->napi, qeth_tx_poll,
7244                                           QETH_NAPI_WEIGHT);
7245                         napi_enable(&queue->napi);
7246                         napi_schedule(&queue->napi);
7247                 }
7248         }
7249
7250         napi_enable(&card->napi);
7251         napi_schedule(&card->napi);
7252         /* kick-start the NAPI softirq: */
7253         local_bh_enable();
7254
7255         return 0;
7256 }
7257 EXPORT_SYMBOL_GPL(qeth_open);
7258
7259 int qeth_stop(struct net_device *dev)
7260 {
7261         struct qeth_card *card = dev->ml_priv;
7262
7263         QETH_CARD_TEXT(card, 4, "qethstop");
7264
7265         napi_disable(&card->napi);
7266         cancel_delayed_work_sync(&card->buffer_reclaim_work);
7267         qdio_stop_irq(CARD_DDEV(card));
7268
7269         if (IS_IQD(card)) {
7270                 struct qeth_qdio_out_q *queue;
7271                 unsigned int i;
7272
7273                 /* Quiesce the NAPI instances: */
7274                 qeth_for_each_output_queue(card, queue, i)
7275                         napi_disable(&queue->napi);
7276
7277                 /* Stop .ndo_start_xmit, might still access queue->napi. */
7278                 netif_tx_disable(dev);
7279
7280                 qeth_for_each_output_queue(card, queue, i) {
7281                         del_timer_sync(&queue->timer);
7282                         /* Queues may get re-allocated, so remove the NAPIs. */
7283                         netif_napi_del(&queue->napi);
7284                 }
7285         } else {
7286                 netif_tx_disable(dev);
7287         }
7288
7289         return 0;
7290 }
7291 EXPORT_SYMBOL_GPL(qeth_stop);
7292
7293 static int __init qeth_core_init(void)
7294 {
7295         int rc;
7296
7297         pr_info("loading core functions\n");
7298
7299         qeth_debugfs_root = debugfs_create_dir("qeth", NULL);
7300
7301         rc = qeth_register_dbf_views();
7302         if (rc)
7303                 goto dbf_err;
7304         qeth_core_root_dev = root_device_register("qeth");
7305         rc = PTR_ERR_OR_ZERO(qeth_core_root_dev);
7306         if (rc)
7307                 goto register_err;
7308         qeth_core_header_cache =
7309                 kmem_cache_create("qeth_hdr", QETH_HDR_CACHE_OBJ_SIZE,
7310                                   roundup_pow_of_two(QETH_HDR_CACHE_OBJ_SIZE),
7311                                   0, NULL);
7312         if (!qeth_core_header_cache) {
7313                 rc = -ENOMEM;
7314                 goto slab_err;
7315         }
7316         qeth_qdio_outbuf_cache = kmem_cache_create("qeth_buf",
7317                         sizeof(struct qeth_qdio_out_buffer), 0, 0, NULL);
7318         if (!qeth_qdio_outbuf_cache) {
7319                 rc = -ENOMEM;
7320                 goto cqslab_err;
7321         }
7322         rc = ccw_driver_register(&qeth_ccw_driver);
7323         if (rc)
7324                 goto ccw_err;
7325         rc = ccwgroup_driver_register(&qeth_core_ccwgroup_driver);
7326         if (rc)
7327                 goto ccwgroup_err;
7328
7329         return 0;
7330
7331 ccwgroup_err:
7332         ccw_driver_unregister(&qeth_ccw_driver);
7333 ccw_err:
7334         kmem_cache_destroy(qeth_qdio_outbuf_cache);
7335 cqslab_err:
7336         kmem_cache_destroy(qeth_core_header_cache);
7337 slab_err:
7338         root_device_unregister(qeth_core_root_dev);
7339 register_err:
7340         qeth_unregister_dbf_views();
7341 dbf_err:
7342         debugfs_remove_recursive(qeth_debugfs_root);
7343         pr_err("Initializing the qeth device driver failed\n");
7344         return rc;
7345 }
7346
7347 static void __exit qeth_core_exit(void)
7348 {
7349         qeth_clear_dbf_list();
7350         ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver);
7351         ccw_driver_unregister(&qeth_ccw_driver);
7352         kmem_cache_destroy(qeth_qdio_outbuf_cache);
7353         kmem_cache_destroy(qeth_core_header_cache);
7354         root_device_unregister(qeth_core_root_dev);
7355         qeth_unregister_dbf_views();
7356         debugfs_remove_recursive(qeth_debugfs_root);
7357         pr_info("core functions removed\n");
7358 }
7359
7360 module_init(qeth_core_init);
7361 module_exit(qeth_core_exit);
7362 MODULE_AUTHOR("Frank Blaschka <[email protected]>");
7363 MODULE_DESCRIPTION("qeth core functions");
7364 MODULE_LICENSE("GPL");