drivers/s390/net/qeth_core_main.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *    Copyright IBM Corp. 2007, 2009
   4  *    Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
   5  *               Frank Pavlic <fpavlic@de.ibm.com>,
   6  *               Thomas Spatzier <tspat@de.ibm.com>,
   7  *               Frank Blaschka <frank.blaschka@de.ibm.com>
   8  */
   9
  10 #define KMSG_COMPONENT "qeth"
  11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  12
  13 #include <linux/compat.h>
  14 #include <linux/module.h>
  15 #include <linux/moduleparam.h>
  16 #include <linux/string.h>
  17 #include <linux/errno.h>
  18 #include <linux/kernel.h>
  19 #include <linux/log2.h>
  20 #include <linux/io.h>
  21 #include <linux/ip.h>
  22 #include <linux/tcp.h>
  23 #include <linux/mii.h>
  24 #include <linux/mm.h>
  25 #include <linux/kthread.h>
  26 #include <linux/slab.h>
  27 #include <linux/if_vlan.h>
  28 #include <linux/netdevice.h>
  29 #include <linux/netdev_features.h>
  30 #include <linux/rcutree.h>
  31 #include <linux/skbuff.h>
  32 #include <linux/vmalloc.h>
  33
  34 #include <net/iucv/af_iucv.h>
  35 #include <net/dsfield.h>
  36 #include <net/sock.h>
  37
  38 #include <asm/ebcdic.h>
  39 #include <asm/chpid.h>
  40 #include <asm/sysinfo.h>
  41 #include <asm/diag.h>
  42 #include <asm/cio.h>
  43 #include <asm/ccwdev.h>
  44 #include <asm/cpcmd.h>
  45
  46 #include "qeth_core.h"
  47
  48 struct qeth_dbf_info qeth_dbf[QETH_DBF_INFOS] = {
  49         /* define dbf - Name, Pages, Areas, Maxlen, Level, View, Handle */
  50         /*                   N  P  A    M  L  V                      H  */
  51         [QETH_DBF_SETUP] = {"qeth_setup",
  52                                 8, 1,   8, 5, &debug_hex_ascii_view, NULL},
  53         [QETH_DBF_MSG]   = {"qeth_msg", 8, 1, 11 * sizeof(long), 3,
  54                             &debug_sprintf_view, NULL},
  55         [QETH_DBF_CTRL]  = {"qeth_control",
  56                 8, 1, QETH_DBF_CTRL_LEN, 5, &debug_hex_ascii_view, NULL},
  57 };
  58 EXPORT_SYMBOL_GPL(qeth_dbf);
  59
  60 struct kmem_cache *qeth_core_header_cache;
  61 EXPORT_SYMBOL_GPL(qeth_core_header_cache);
  62 static struct kmem_cache *qeth_qdio_outbuf_cache;
  63
  64 static struct device *qeth_core_root_dev;
  65 static struct dentry *qeth_debugfs_root;
  66 static struct lock_class_key qdio_out_skb_queue_key;
  67
  68 static void qeth_issue_next_read_cb(struct qeth_card *card,
  69                                     struct qeth_cmd_buffer *iob,
  70                                     unsigned int data_length);
  71 static int qeth_qdio_establish(struct qeth_card *);
  72 static void qeth_free_qdio_queues(struct qeth_card *card);
  73 static void qeth_notify_skbs(struct qeth_qdio_out_q *queue,
  74                 struct qeth_qdio_out_buffer *buf,
  75                 enum iucv_tx_notify notification);
  76 static void qeth_tx_complete_buf(struct qeth_qdio_out_buffer *buf, bool error,
  77                                  int budget);
  78
  79 static void qeth_close_dev_handler(struct work_struct *work)
  80 {
  81         struct qeth_card *card;
  82
  83         card = container_of(work, struct qeth_card, close_dev_work);
  84         QETH_CARD_TEXT(card, 2, "cldevhdl");
  85         ccwgroup_set_offline(card->gdev);
  86 }
  87
  88 static const char *qeth_get_cardname(struct qeth_card *card)
  89 {
  90         if (IS_VM_NIC(card)) {
  91                 switch (card->info.type) {
  92                 case QETH_CARD_TYPE_OSD:
  93                         return " Virtual NIC QDIO";
  94                 case QETH_CARD_TYPE_IQD:
  95                         return " Virtual NIC Hiper";
  96                 case QETH_CARD_TYPE_OSM:
  97                         return " Virtual NIC QDIO - OSM";
  98                 case QETH_CARD_TYPE_OSX:
  99                         return " Virtual NIC QDIO - OSX";
 100                 default:
 101                         return " unknown";
 102                 }
 103         } else {
 104                 switch (card->info.type) {
 105                 case QETH_CARD_TYPE_OSD:
 106                         return " OSD Express";
 107                 case QETH_CARD_TYPE_IQD:
 108                         return " HiperSockets";
 109                 case QETH_CARD_TYPE_OSN:
 110                         return " OSN QDIO";
 111                 case QETH_CARD_TYPE_OSM:
 112                         return " OSM QDIO";
 113                 case QETH_CARD_TYPE_OSX:
 114                         return " OSX QDIO";
 115                 default:
 116                         return " unknown";
 117                 }
 118         }
 119         return " n/a";
 120 }
 121
 122 /* max length to be returned: 14 */
 123 const char *qeth_get_cardname_short(struct qeth_card *card)
 124 {
 125         if (IS_VM_NIC(card)) {
 126                 switch (card->info.type) {
 127                 case QETH_CARD_TYPE_OSD:
 128                         return "Virt.NIC QDIO";
 129                 case QETH_CARD_TYPE_IQD:
 130                         return "Virt.NIC Hiper";
 131                 case QETH_CARD_TYPE_OSM:
 132                         return "Virt.NIC OSM";
 133                 case QETH_CARD_TYPE_OSX:
 134                         return "Virt.NIC OSX";
 135                 default:
 136                         return "unknown";
 137                 }
 138         } else {
 139                 switch (card->info.type) {
 140                 case QETH_CARD_TYPE_OSD:
 141                         switch (card->info.link_type) {
 142                         case QETH_LINK_TYPE_FAST_ETH:
 143                                 return "OSD_100";
 144                         case QETH_LINK_TYPE_HSTR:
 145                                 return "HSTR";
 146                         case QETH_LINK_TYPE_GBIT_ETH:
 147                                 return "OSD_1000";
 148                         case QETH_LINK_TYPE_10GBIT_ETH:
 149                                 return "OSD_10GIG";
 150                         case QETH_LINK_TYPE_25GBIT_ETH:
 151                                 return "OSD_25GIG";
 152                         case QETH_LINK_TYPE_LANE_ETH100:
 153                                 return "OSD_FE_LANE";
 154                         case QETH_LINK_TYPE_LANE_TR:
 155                                 return "OSD_TR_LANE";
 156                         case QETH_LINK_TYPE_LANE_ETH1000:
 157                                 return "OSD_GbE_LANE";
 158                         case QETH_LINK_TYPE_LANE:
 159                                 return "OSD_ATM_LANE";
 160                         default:
 161                                 return "OSD_Express";
 162                         }
 163                 case QETH_CARD_TYPE_IQD:
 164                         return "HiperSockets";
 165                 case QETH_CARD_TYPE_OSN:
 166                         return "OSN";
 167                 case QETH_CARD_TYPE_OSM:
 168                         return "OSM_1000";
 169                 case QETH_CARD_TYPE_OSX:
 170                         return "OSX_10GIG";
 171                 default:
 172                         return "unknown";
 173                 }
 174         }
 175         return "n/a";
 176 }
 177
 178 void qeth_set_allowed_threads(struct qeth_card *card, unsigned long threads,
 179                          int clear_start_mask)
 180 {
 181         unsigned long flags;
 182
 183         spin_lock_irqsave(&card->thread_mask_lock, flags);
 184         card->thread_allowed_mask = threads;
 185         if (clear_start_mask)
 186                 card->thread_start_mask &= threads;
 187         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 188         wake_up(&card->wait_q);
 189 }
 190 EXPORT_SYMBOL_GPL(qeth_set_allowed_threads);
 191
 192 int qeth_threads_running(struct qeth_card *card, unsigned long threads)
 193 {
 194         unsigned long flags;
 195         int rc = 0;
 196
 197         spin_lock_irqsave(&card->thread_mask_lock, flags);
 198         rc = (card->thread_running_mask & threads);
 199         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 200         return rc;
 201 }
 202 EXPORT_SYMBOL_GPL(qeth_threads_running);
 203
 204 static void qeth_clear_working_pool_list(struct qeth_card *card)
 205 {
 206         struct qeth_buffer_pool_entry *pool_entry, *tmp;
 207         struct qeth_qdio_q *queue = card->qdio.in_q;
 208         unsigned int i;
 209
 210         QETH_CARD_TEXT(card, 5, "clwrklst");
 211         list_for_each_entry_safe(pool_entry, tmp,
 212                                  &card->qdio.in_buf_pool.entry_list, list)
 213                 list_del(&pool_entry->list);
 214
 215         for (i = 0; i < ARRAY_SIZE(queue->bufs); i++)
 216                 queue->bufs[i].pool_entry = NULL;
 217 }
 218
 219 static void qeth_free_pool_entry(struct qeth_buffer_pool_entry *entry)
 220 {
 221         unsigned int i;
 222
 223         for (i = 0; i < ARRAY_SIZE(entry->elements); i++) {
 224                 if (entry->elements[i])
 225                         __free_page(entry->elements[i]);
 226         }
 227
 228         kfree(entry);
 229 }
 230
 231 static void qeth_free_buffer_pool(struct qeth_card *card)
 232 {
 233         struct qeth_buffer_pool_entry *entry, *tmp;
 234
 235         list_for_each_entry_safe(entry, tmp, &card->qdio.init_pool.entry_list,
 236                                  init_list) {
 237                 list_del(&entry->init_list);
 238                 qeth_free_pool_entry(entry);
 239         }
 240 }
 241
 242 static struct qeth_buffer_pool_entry *qeth_alloc_pool_entry(unsigned int pages)
 243 {
 244         struct qeth_buffer_pool_entry *entry;
 245         unsigned int i;
 246
 247         entry = kzalloc(sizeof(*entry), GFP_KERNEL);
 248         if (!entry)
 249                 return NULL;
 250
 251         for (i = 0; i < pages; i++) {
 252                 entry->elements[i] = __dev_alloc_page(GFP_KERNEL);
 253
 254                 if (!entry->elements[i]) {
 255                         qeth_free_pool_entry(entry);
 256                         return NULL;
 257                 }
 258         }
 259
 260         return entry;
 261 }
 262
 263 static int qeth_alloc_buffer_pool(struct qeth_card *card)
 264 {
 265         unsigned int buf_elements = QETH_MAX_BUFFER_ELEMENTS(card);
 266         unsigned int i;
 267
 268         QETH_CARD_TEXT(card, 5, "alocpool");
 269         for (i = 0; i < card->qdio.init_pool.buf_count; ++i) {
 270                 struct qeth_buffer_pool_entry *entry;
 271
 272                 entry = qeth_alloc_pool_entry(buf_elements);
 273                 if (!entry) {
 274                         qeth_free_buffer_pool(card);
 275                         return -ENOMEM;
 276                 }
 277
 278                 list_add(&entry->init_list, &card->qdio.init_pool.entry_list);
 279         }
 280         return 0;
 281 }
 282
 283 int qeth_resize_buffer_pool(struct qeth_card *card, unsigned int count)
 284 {
 285         unsigned int buf_elements = QETH_MAX_BUFFER_ELEMENTS(card);
 286         struct qeth_qdio_buffer_pool *pool = &card->qdio.init_pool;
 287         struct qeth_buffer_pool_entry *entry, *tmp;
 288         int delta = count - pool->buf_count;
 289         LIST_HEAD(entries);
 290
 291         QETH_CARD_TEXT(card, 2, "realcbp");
 292
 293         /* Defer until queue is allocated: */
 294         if (!card->qdio.in_q)
 295                 goto out;
 296
 297         /* Remove entries from the pool: */
 298         while (delta < 0) {
 299                 entry = list_first_entry(&pool->entry_list,
 300                                          struct qeth_buffer_pool_entry,
 301                                          init_list);
 302                 list_del(&entry->init_list);
 303                 qeth_free_pool_entry(entry);
 304
 305                 delta++;
 306         }
 307
 308         /* Allocate additional entries: */
 309         while (delta > 0) {
 310                 entry = qeth_alloc_pool_entry(buf_elements);
 311                 if (!entry) {
 312                         list_for_each_entry_safe(entry, tmp, &entries,
 313                                                  init_list) {
 314                                 list_del(&entry->init_list);
 315                                 qeth_free_pool_entry(entry);
 316                         }
 317
 318                         return -ENOMEM;
 319                 }
 320
 321                 list_add(&entry->init_list, &entries);
 322
 323                 delta--;
 324         }
 325
 326         list_splice(&entries, &pool->entry_list);
 327
 328 out:
 329         card->qdio.in_buf_pool.buf_count = count;
 330         pool->buf_count = count;
 331         return 0;
 332 }
 333 EXPORT_SYMBOL_GPL(qeth_resize_buffer_pool);
 334
 335 static void qeth_free_qdio_queue(struct qeth_qdio_q *q)
 336 {
 337         if (!q)
 338                 return;
 339
 340         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
 341         kfree(q);
 342 }
 343
 344 static struct qeth_qdio_q *qeth_alloc_qdio_queue(void)
 345 {
 346         struct qeth_qdio_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
 347         int i;
 348
 349         if (!q)
 350                 return NULL;
 351
 352         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
 353                 kfree(q);
 354                 return NULL;
 355         }
 356
 357         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i)
 358                 q->bufs[i].buffer = q->qdio_bufs[i];
 359
 360         QETH_DBF_HEX(SETUP, 2, &q, sizeof(void *));
 361         return q;
 362 }
 363
 364 static int qeth_cq_init(struct qeth_card *card)
 365 {
 366         int rc;
 367
 368         if (card->options.cq == QETH_CQ_ENABLED) {
 369                 QETH_CARD_TEXT(card, 2, "cqinit");
 370                 qdio_reset_buffers(card->qdio.c_q->qdio_bufs,
 371                                    QDIO_MAX_BUFFERS_PER_Q);
 372                 card->qdio.c_q->next_buf_to_init = 127;
 373                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT,
 374                              card->qdio.no_in_queues - 1, 0,
 375                              127);
 376                 if (rc) {
 377                         QETH_CARD_TEXT_(card, 2, "1err%d", rc);
 378                         goto out;
 379                 }
 380         }
 381         rc = 0;
 382 out:
 383         return rc;
 384 }
 385
 386 static int qeth_alloc_cq(struct qeth_card *card)
 387 {
 388         int rc;
 389
 390         if (card->options.cq == QETH_CQ_ENABLED) {
 391                 int i;
 392                 struct qdio_outbuf_state *outbuf_states;
 393
 394                 QETH_CARD_TEXT(card, 2, "cqon");
 395                 card->qdio.c_q = qeth_alloc_qdio_queue();
 396                 if (!card->qdio.c_q) {
 397                         rc = -1;
 398                         goto kmsg_out;
 399                 }
 400                 card->qdio.no_in_queues = 2;
 401                 card->qdio.out_bufstates =
 402                         kcalloc(card->qdio.no_out_queues *
 403                                         QDIO_MAX_BUFFERS_PER_Q,
 404                                 sizeof(struct qdio_outbuf_state),
 405                                 GFP_KERNEL);
 406                 outbuf_states = card->qdio.out_bufstates;
 407                 if (outbuf_states == NULL) {
 408                         rc = -1;
 409                         goto free_cq_out;
 410                 }
 411                 for (i = 0; i < card->qdio.no_out_queues; ++i) {
 412                         card->qdio.out_qs[i]->bufstates = outbuf_states;
 413                         outbuf_states += QDIO_MAX_BUFFERS_PER_Q;
 414                 }
 415         } else {
 416                 QETH_CARD_TEXT(card, 2, "nocq");
 417                 card->qdio.c_q = NULL;
 418                 card->qdio.no_in_queues = 1;
 419         }
 420         QETH_CARD_TEXT_(card, 2, "iqc%d", card->qdio.no_in_queues);
 421         rc = 0;
 422 out:
 423         return rc;
 424 free_cq_out:
 425         qeth_free_qdio_queue(card->qdio.c_q);
 426         card->qdio.c_q = NULL;
 427 kmsg_out:
 428         dev_err(&card->gdev->dev, "Failed to create completion queue\n");
 429         goto out;
 430 }
 431
 432 static void qeth_free_cq(struct qeth_card *card)
 433 {
 434         if (card->qdio.c_q) {
 435                 --card->qdio.no_in_queues;
 436                 qeth_free_qdio_queue(card->qdio.c_q);
 437                 card->qdio.c_q = NULL;
 438         }
 439         kfree(card->qdio.out_bufstates);
 440         card->qdio.out_bufstates = NULL;
 441 }
 442
 443 static enum iucv_tx_notify qeth_compute_cq_notification(int sbalf15,
 444                                                         int delayed)
 445 {
 446         enum iucv_tx_notify n;
 447
 448         switch (sbalf15) {
 449         case 0:
 450                 n = delayed ? TX_NOTIFY_DELAYED_OK : TX_NOTIFY_OK;
 451                 break;
 452         case 4:
 453         case 16:
 454         case 17:
 455         case 18:
 456                 n = delayed ? TX_NOTIFY_DELAYED_UNREACHABLE :
 457                         TX_NOTIFY_UNREACHABLE;
 458                 break;
 459         default:
 460                 n = delayed ? TX_NOTIFY_DELAYED_GENERALERROR :
 461                         TX_NOTIFY_GENERALERROR;
 462                 break;
 463         }
 464
 465         return n;
 466 }
 467
 468 static void qeth_cleanup_handled_pending(struct qeth_qdio_out_q *q, int bidx,
 469                                          int forced_cleanup)
 470 {
 471         if (q->card->options.cq != QETH_CQ_ENABLED)
 472                 return;
 473
 474         if (q->bufs[bidx]->next_pending != NULL) {
 475                 struct qeth_qdio_out_buffer *head = q->bufs[bidx];
 476                 struct qeth_qdio_out_buffer *c = q->bufs[bidx]->next_pending;
 477
 478                 while (c) {
 479                         if (forced_cleanup ||
 480                             atomic_read(&c->state) == QETH_QDIO_BUF_EMPTY) {
 481                                 struct qeth_qdio_out_buffer *f = c;
 482
 483                                 QETH_CARD_TEXT(f->q->card, 5, "fp");
 484                                 QETH_CARD_TEXT_(f->q->card, 5, "%lx", (long) f);
 485                                 /* release here to avoid interleaving between
 486                                    outbound tasklet and inbound tasklet
 487                                    regarding notifications and lifecycle */
 488                                 qeth_tx_complete_buf(c, forced_cleanup, 0);
 489
 490                                 c = f->next_pending;
 491                                 WARN_ON_ONCE(head->next_pending != f);
 492                                 head->next_pending = c;
 493                                 kmem_cache_free(qeth_qdio_outbuf_cache, f);
 494                         } else {
 495                                 head = c;
 496                                 c = c->next_pending;
 497                         }
 498
 499                 }
 500         }
 501 }
 502
 503 static void qeth_qdio_handle_aob(struct qeth_card *card,
 504                                  unsigned long phys_aob_addr)
 505 {
 506         enum qeth_qdio_out_buffer_state new_state = QETH_QDIO_BUF_QAOB_OK;
 507         struct qaob *aob;
 508         struct qeth_qdio_out_buffer *buffer;
 509         enum iucv_tx_notify notification;
 510         unsigned int i;
 511
 512         aob = (struct qaob *) phys_to_virt(phys_aob_addr);
 513         QETH_CARD_TEXT(card, 5, "haob");
 514         QETH_CARD_TEXT_(card, 5, "%lx", phys_aob_addr);
 515         buffer = (struct qeth_qdio_out_buffer *) aob->user1;
 516         QETH_CARD_TEXT_(card, 5, "%lx", aob->user1);
 517
 518         if (aob->aorc) {
 519                 QETH_CARD_TEXT_(card, 2, "aorc%02X", aob->aorc);
 520                 new_state = QETH_QDIO_BUF_QAOB_ERROR;
 521         }
 522
 523         switch (atomic_xchg(&buffer->state, new_state)) {
 524         case QETH_QDIO_BUF_PRIMED:
 525                 /* Faster than TX completion code, let it handle the async
 526                  * completion for us.
 527                  */
 528                 break;
 529         case QETH_QDIO_BUF_PENDING:
 530                 /* TX completion code is active and will handle the async
 531                  * completion for us.
 532                  */
 533                 break;
 534         case QETH_QDIO_BUF_NEED_QAOB:
 535                 /* TX completion code is already finished. */
 536                 notification = qeth_compute_cq_notification(aob->aorc, 1);
 537                 qeth_notify_skbs(buffer->q, buffer, notification);
 538
 539                 /* Free dangling allocations. The attached skbs are handled by
 540                  * qeth_cleanup_handled_pending().
 541                  */
 542                 for (i = 0;
 543                      i < aob->sb_count && i < QETH_MAX_BUFFER_ELEMENTS(card);
 544                      i++) {
 545                         void *data = phys_to_virt(aob->sba[i]);
 546
 547                         if (data && buffer->is_header[i])
 548                                 kmem_cache_free(qeth_core_header_cache, data);
 549                         buffer->is_header[i] = 0;
 550                 }
 551
 552                 atomic_set(&buffer->state, QETH_QDIO_BUF_EMPTY);
 553                 break;
 554         default:
 555                 WARN_ON_ONCE(1);
 556         }
 557
 558         qdio_release_aob(aob);
 559 }
 560
 561 static void qeth_setup_ccw(struct ccw1 *ccw, u8 cmd_code, u8 flags, u32 len,
 562                            void *data)
 563 {
 564         ccw->cmd_code = cmd_code;
 565         ccw->flags = flags | CCW_FLAG_SLI;
 566         ccw->count = len;
 567         ccw->cda = (__u32) __pa(data);
 568 }
 569
 570 static int __qeth_issue_next_read(struct qeth_card *card)
 571 {
 572         struct qeth_cmd_buffer *iob = card->read_cmd;
 573         struct qeth_channel *channel = iob->channel;
 574         struct ccw1 *ccw = __ccw_from_cmd(iob);
 575         int rc;
 576
 577         QETH_CARD_TEXT(card, 5, "issnxrd");
 578         if (channel->state != CH_STATE_UP)
 579                 return -EIO;
 580
 581         memset(iob->data, 0, iob->length);
 582         qeth_setup_ccw(ccw, CCW_CMD_READ, 0, iob->length, iob->data);
 583         iob->callback = qeth_issue_next_read_cb;
 584         /* keep the cmd alive after completion: */
 585         qeth_get_cmd(iob);
 586
 587         QETH_CARD_TEXT(card, 6, "noirqpnd");
 588         rc = ccw_device_start(channel->ccwdev, ccw, (addr_t) iob, 0, 0);
 589         if (!rc) {
 590                 channel->active_cmd = iob;
 591         } else {
 592                 QETH_DBF_MESSAGE(2, "error %i on device %x when starting next read ccw!\n",
 593                                  rc, CARD_DEVID(card));
 594                 qeth_unlock_channel(card, channel);
 595                 qeth_put_cmd(iob);
 596                 card->read_or_write_problem = 1;
 597                 qeth_schedule_recovery(card);
 598         }
 599         return rc;
 600 }
 601
 602 static int qeth_issue_next_read(struct qeth_card *card)
 603 {
 604         int ret;
 605
 606         spin_lock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 607         ret = __qeth_issue_next_read(card);
 608         spin_unlock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 609
 610         return ret;
 611 }
 612
 613 static void qeth_enqueue_cmd(struct qeth_card *card,
 614                              struct qeth_cmd_buffer *iob)
 615 {
 616         spin_lock_irq(&card->lock);
 617         list_add_tail(&iob->list_entry, &card->cmd_waiter_list);
 618         spin_unlock_irq(&card->lock);
 619 }
 620
 621 static void qeth_dequeue_cmd(struct qeth_card *card,
 622                              struct qeth_cmd_buffer *iob)
 623 {
 624         spin_lock_irq(&card->lock);
 625         list_del(&iob->list_entry);
 626         spin_unlock_irq(&card->lock);
 627 }
 628
 629 void qeth_notify_cmd(struct qeth_cmd_buffer *iob, int reason)
 630 {
 631         iob->rc = reason;
 632         complete(&iob->done);
 633 }
 634 EXPORT_SYMBOL_GPL(qeth_notify_cmd);
 635
 636 static void qeth_flush_local_addrs4(struct qeth_card *card)
 637 {
 638         struct qeth_local_addr *addr;
 639         struct hlist_node *tmp;
 640         unsigned int i;
 641
 642         spin_lock_irq(&card->local_addrs4_lock);
 643         hash_for_each_safe(card->local_addrs4, i, tmp, addr, hnode) {
 644                 hash_del_rcu(&addr->hnode);
 645                 kfree_rcu(addr, rcu);
 646         }
 647         spin_unlock_irq(&card->local_addrs4_lock);
 648 }
 649
 650 static void qeth_flush_local_addrs6(struct qeth_card *card)
 651 {
 652         struct qeth_local_addr *addr;
 653         struct hlist_node *tmp;
 654         unsigned int i;
 655
 656         spin_lock_irq(&card->local_addrs6_lock);
 657         hash_for_each_safe(card->local_addrs6, i, tmp, addr, hnode) {
 658                 hash_del_rcu(&addr->hnode);
 659                 kfree_rcu(addr, rcu);
 660         }
 661         spin_unlock_irq(&card->local_addrs6_lock);
 662 }
 663
 664 static void qeth_flush_local_addrs(struct qeth_card *card)
 665 {
 666         qeth_flush_local_addrs4(card);
 667         qeth_flush_local_addrs6(card);
 668 }
 669
 670 static void qeth_add_local_addrs4(struct qeth_card *card,
 671                                   struct qeth_ipacmd_local_addrs4 *cmd)
 672 {
 673         unsigned int i;
 674
 675         if (cmd->addr_length !=
 676             sizeof_field(struct qeth_ipacmd_local_addr4, addr)) {
 677                 dev_err_ratelimited(&card->gdev->dev,
 678                                     "Dropped IPv4 ADD LOCAL ADDR event with bad length %u\n",
 679                                     cmd->addr_length);
 680                 return;
 681         }
 682
 683         spin_lock(&card->local_addrs4_lock);
 684         for (i = 0; i < cmd->count; i++) {
 685                 unsigned int key = ipv4_addr_hash(cmd->addrs[i].addr);
 686                 struct qeth_local_addr *addr;
 687                 bool duplicate = false;
 688
 689                 hash_for_each_possible(card->local_addrs4, addr, hnode, key) {
 690                         if (addr->addr.s6_addr32[3] == cmd->addrs[i].addr) {
 691                                 duplicate = true;
 692                                 break;
 693                         }
 694                 }
 695
 696                 if (duplicate)
 697                         continue;
 698
 699                 addr = kmalloc(sizeof(*addr), GFP_ATOMIC);
 700                 if (!addr) {
 701                         dev_err(&card->gdev->dev,
 702                                 "Failed to allocate local addr object. Traffic to %pI4 might suffer.\n",
 703                                 &cmd->addrs[i].addr);
 704                         continue;
 705                 }
 706
 707                 ipv6_addr_set(&addr->addr, 0, 0, 0, cmd->addrs[i].addr);
 708                 hash_add_rcu(card->local_addrs4, &addr->hnode, key);
 709         }
 710         spin_unlock(&card->local_addrs4_lock);
 711 }
 712
 713 static void qeth_add_local_addrs6(struct qeth_card *card,
 714                                   struct qeth_ipacmd_local_addrs6 *cmd)
 715 {
 716         unsigned int i;
 717
 718         if (cmd->addr_length !=
 719             sizeof_field(struct qeth_ipacmd_local_addr6, addr)) {
 720                 dev_err_ratelimited(&card->gdev->dev,
 721                                     "Dropped IPv6 ADD LOCAL ADDR event with bad length %u\n",
 722                                     cmd->addr_length);
 723                 return;
 724         }
 725
 726         spin_lock(&card->local_addrs6_lock);
 727         for (i = 0; i < cmd->count; i++) {
 728                 u32 key = ipv6_addr_hash(&cmd->addrs[i].addr);
 729                 struct qeth_local_addr *addr;
 730                 bool duplicate = false;
 731
 732                 hash_for_each_possible(card->local_addrs6, addr, hnode, key) {
 733                         if (ipv6_addr_equal(&addr->addr, &cmd->addrs[i].addr)) {
 734                                 duplicate = true;
 735                                 break;
 736                         }
 737                 }
 738
 739                 if (duplicate)
 740                         continue;
 741
 742                 addr = kmalloc(sizeof(*addr), GFP_ATOMIC);
 743                 if (!addr) {
 744                         dev_err(&card->gdev->dev,
 745                                 "Failed to allocate local addr object. Traffic to %pI6c might suffer.\n",
 746                                 &cmd->addrs[i].addr);
 747                         continue;
 748                 }
 749
 750                 addr->addr = cmd->addrs[i].addr;
 751                 hash_add_rcu(card->local_addrs6, &addr->hnode, key);
 752         }
 753         spin_unlock(&card->local_addrs6_lock);
 754 }
 755
 756 static void qeth_del_local_addrs4(struct qeth_card *card,
 757                                   struct qeth_ipacmd_local_addrs4 *cmd)
 758 {
 759         unsigned int i;
 760
 761         if (cmd->addr_length !=
 762             sizeof_field(struct qeth_ipacmd_local_addr4, addr)) {
 763                 dev_err_ratelimited(&card->gdev->dev,
 764                                     "Dropped IPv4 DEL LOCAL ADDR event with bad length %u\n",
 765                                     cmd->addr_length);
 766                 return;
 767         }
 768
 769         spin_lock(&card->local_addrs4_lock);
 770         for (i = 0; i < cmd->count; i++) {
 771                 struct qeth_ipacmd_local_addr4 *addr = &cmd->addrs[i];
 772                 unsigned int key = ipv4_addr_hash(addr->addr);
 773                 struct qeth_local_addr *tmp;
 774
 775                 hash_for_each_possible(card->local_addrs4, tmp, hnode, key) {
 776                         if (tmp->addr.s6_addr32[3] == addr->addr) {
 777                                 hash_del_rcu(&tmp->hnode);
 778                                 kfree_rcu(tmp, rcu);
 779                                 break;
 780                         }
 781                 }
 782         }
 783         spin_unlock(&card->local_addrs4_lock);
 784 }
 785
 786 static void qeth_del_local_addrs6(struct qeth_card *card,
 787                                   struct qeth_ipacmd_local_addrs6 *cmd)
 788 {
 789         unsigned int i;
 790
 791         if (cmd->addr_length !=
 792             sizeof_field(struct qeth_ipacmd_local_addr6, addr)) {
 793                 dev_err_ratelimited(&card->gdev->dev,
 794                                     "Dropped IPv6 DEL LOCAL ADDR event with bad length %u\n",
 795                                     cmd->addr_length);
 796                 return;
 797         }
 798
 799         spin_lock(&card->local_addrs6_lock);
 800         for (i = 0; i < cmd->count; i++) {
 801                 struct qeth_ipacmd_local_addr6 *addr = &cmd->addrs[i];
 802                 u32 key = ipv6_addr_hash(&addr->addr);
 803                 struct qeth_local_addr *tmp;
 804
 805                 hash_for_each_possible(card->local_addrs6, tmp, hnode, key) {
 806                         if (ipv6_addr_equal(&tmp->addr, &addr->addr)) {
 807                                 hash_del_rcu(&tmp->hnode);
 808                                 kfree_rcu(tmp, rcu);
 809                                 break;
 810                         }
 811                 }
 812         }
 813         spin_unlock(&card->local_addrs6_lock);
 814 }
 815
 816 static bool qeth_next_hop_is_local_v4(struct qeth_card *card,
 817                                       struct sk_buff *skb)
 818 {
 819         struct qeth_local_addr *tmp;
 820         bool is_local = false;
 821         unsigned int key;
 822         __be32 next_hop;
 823
 824         if (hash_empty(card->local_addrs4))
 825                 return false;
 826
 827         rcu_read_lock();
 828         next_hop = qeth_next_hop_v4_rcu(skb,
 829                                         qeth_dst_check_rcu(skb, htons(ETH_P_IP)));
 830         key = ipv4_addr_hash(next_hop);
 831
 832         hash_for_each_possible_rcu(card->local_addrs4, tmp, hnode, key) {
 833                 if (tmp->addr.s6_addr32[3] == next_hop) {
 834                         is_local = true;
 835                         break;
 836                 }
 837         }
 838         rcu_read_unlock();
 839
 840         return is_local;
 841 }
 842
 843 static bool qeth_next_hop_is_local_v6(struct qeth_card *card,
 844                                       struct sk_buff *skb)
 845 {
 846         struct qeth_local_addr *tmp;
 847         struct in6_addr *next_hop;
 848         bool is_local = false;
 849         u32 key;
 850
 851         if (hash_empty(card->local_addrs6))
 852                 return false;
 853
 854         rcu_read_lock();
 855         next_hop = qeth_next_hop_v6_rcu(skb,
 856                                         qeth_dst_check_rcu(skb, htons(ETH_P_IPV6)));
 857         key = ipv6_addr_hash(next_hop);
 858
 859         hash_for_each_possible_rcu(card->local_addrs6, tmp, hnode, key) {
 860                 if (ipv6_addr_equal(&tmp->addr, next_hop)) {
 861                         is_local = true;
 862                         break;
 863                 }
 864         }
 865         rcu_read_unlock();
 866
 867         return is_local;
 868 }
 869
 870 static int qeth_debugfs_local_addr_show(struct seq_file *m, void *v)
 871 {
 872         struct qeth_card *card = m->private;
 873         struct qeth_local_addr *tmp;
 874         unsigned int i;
 875
 876         rcu_read_lock();
 877         hash_for_each_rcu(card->local_addrs4, i, tmp, hnode)
 878                 seq_printf(m, "%pI4\n", &tmp->addr.s6_addr32[3]);
 879         hash_for_each_rcu(card->local_addrs6, i, tmp, hnode)
 880                 seq_printf(m, "%pI6c\n", &tmp->addr);
 881         rcu_read_unlock();
 882
 883         return 0;
 884 }
 885
 886 DEFINE_SHOW_ATTRIBUTE(qeth_debugfs_local_addr);
 887
 888 static void qeth_issue_ipa_msg(struct qeth_ipa_cmd *cmd, int rc,
 889                 struct qeth_card *card)
 890 {
 891         const char *ipa_name;
 892         int com = cmd->hdr.command;
 893
 894         ipa_name = qeth_get_ipa_cmd_name(com);
 895
 896         if (rc)
 897                 QETH_DBF_MESSAGE(2, "IPA: %s(%#x) for device %x returned %#x \"%s\"\n",
 898                                  ipa_name, com, CARD_DEVID(card), rc,
 899                                  qeth_get_ipa_msg(rc));
 900         else
 901                 QETH_DBF_MESSAGE(5, "IPA: %s(%#x) for device %x succeeded\n",
 902                                  ipa_name, com, CARD_DEVID(card));
 903 }
 904
 905 static struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card,
 906                                                 struct qeth_ipa_cmd *cmd)
 907 {
 908         QETH_CARD_TEXT(card, 5, "chkipad");
 909
 910         if (IS_IPA_REPLY(cmd)) {
 911                 if (cmd->hdr.command != IPA_CMD_SETCCID &&
 912                     cmd->hdr.command != IPA_CMD_DELCCID &&
 913                     cmd->hdr.command != IPA_CMD_MODCCID &&
 914                     cmd->hdr.command != IPA_CMD_SET_DIAG_ASS)
 915                         qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
 916                 return cmd;
 917         }
 918
 919         /* handle unsolicited event: */
 920         switch (cmd->hdr.command) {
 921         case IPA_CMD_STOPLAN:
 922                 if (cmd->hdr.return_code == IPA_RC_VEPA_TO_VEB_TRANSITION) {
 923                         dev_err(&card->gdev->dev,
 924                                 "Interface %s is down because the adjacent port is no longer in reflective relay mode\n",
 925                                 netdev_name(card->dev));
 926                         schedule_work(&card->close_dev_work);
 927                 } else {
 928                         dev_warn(&card->gdev->dev,
 929                                  "The link for interface %s on CHPID 0x%X failed\n",
 930                                  netdev_name(card->dev), card->info.chpid);
 931                         qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
 932                         netif_carrier_off(card->dev);
 933                 }
 934                 return NULL;
 935         case IPA_CMD_STARTLAN:
 936                 dev_info(&card->gdev->dev,
 937                          "The link for %s on CHPID 0x%X has been restored\n",
 938                          netdev_name(card->dev), card->info.chpid);
 939                 if (card->info.hwtrap)
 940                         card->info.hwtrap = 2;
 941                 qeth_schedule_recovery(card);
 942                 return NULL;
 943         case IPA_CMD_SETBRIDGEPORT_IQD:
 944         case IPA_CMD_SETBRIDGEPORT_OSA:
 945         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
 946                 if (card->discipline->control_event_handler(card, cmd))
 947                         return cmd;
 948                 return NULL;
 949         case IPA_CMD_MODCCID:
 950                 return cmd;
 951         case IPA_CMD_REGISTER_LOCAL_ADDR:
 952                 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
 953                         qeth_add_local_addrs4(card, &cmd->data.local_addrs4);
 954                 else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
 955                         qeth_add_local_addrs6(card, &cmd->data.local_addrs6);
 956
 957                 QETH_CARD_TEXT(card, 3, "irla");
 958                 return NULL;
 959         case IPA_CMD_UNREGISTER_LOCAL_ADDR:
 960                 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
 961                         qeth_del_local_addrs4(card, &cmd->data.local_addrs4);
 962                 else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
 963                         qeth_del_local_addrs6(card, &cmd->data.local_addrs6);
 964
 965                 QETH_CARD_TEXT(card, 3, "urla");
 966                 return NULL;
 967         default:
 968                 QETH_DBF_MESSAGE(2, "Received data is IPA but not a reply!\n");
 969                 return cmd;
 970         }
 971 }
 972
 973 static void qeth_clear_ipacmd_list(struct qeth_card *card)
 974 {
 975         struct qeth_cmd_buffer *iob;
 976         unsigned long flags;
 977
 978         QETH_CARD_TEXT(card, 4, "clipalst");
 979
 980         spin_lock_irqsave(&card->lock, flags);
 981         list_for_each_entry(iob, &card->cmd_waiter_list, list_entry)
 982                 qeth_notify_cmd(iob, -ECANCELED);
 983         spin_unlock_irqrestore(&card->lock, flags);
 984 }
 985
 986 static int qeth_check_idx_response(struct qeth_card *card,
 987         unsigned char *buffer)
 988 {
 989         QETH_DBF_HEX(CTRL, 2, buffer, QETH_DBF_CTRL_LEN);
 990         if ((buffer[2] & QETH_IDX_TERMINATE_MASK) == QETH_IDX_TERMINATE) {
 991                 QETH_DBF_MESSAGE(2, "received an IDX TERMINATE with cause code %#04x\n",
 992                                  buffer[4]);
 993                 QETH_CARD_TEXT(card, 2, "ckidxres");
 994                 QETH_CARD_TEXT(card, 2, " idxterm");
 995                 QETH_CARD_TEXT_(card, 2, "rc%x", buffer[4]);
 996                 if (buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT ||
 997                     buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT_VM) {
 998                         dev_err(&card->gdev->dev,
 999                                 "The device does not support the configured transport mode\n");
1000                         return -EPROTONOSUPPORT;
1001                 }
1002                 return -EIO;
1003         }
1004         return 0;
1005 }
1006
1007 void qeth_put_cmd(struct qeth_cmd_buffer *iob)
1008 {
1009         if (refcount_dec_and_test(&iob->ref_count)) {
1010                 kfree(iob->data);
1011                 kfree(iob);
1012         }
1013 }
1014 EXPORT_SYMBOL_GPL(qeth_put_cmd);
1015
1016 static void qeth_release_buffer_cb(struct qeth_card *card,
1017                                    struct qeth_cmd_buffer *iob,
1018                                    unsigned int data_length)
1019 {
1020         qeth_put_cmd(iob);
1021 }
1022
1023 static void qeth_cancel_cmd(struct qeth_cmd_buffer *iob, int rc)
1024 {
1025         qeth_notify_cmd(iob, rc);
1026         qeth_put_cmd(iob);
1027 }
1028
1029 struct qeth_cmd_buffer *qeth_alloc_cmd(struct qeth_channel *channel,
1030                                        unsigned int length, unsigned int ccws,
1031                                        long timeout)
1032 {
1033         struct qeth_cmd_buffer *iob;
1034
1035         if (length > QETH_BUFSIZE)
1036                 return NULL;
1037
1038         iob = kzalloc(sizeof(*iob), GFP_KERNEL);
1039         if (!iob)
1040                 return NULL;
1041
1042         iob->data = kzalloc(ALIGN(length, 8) + ccws * sizeof(struct ccw1),
1043                             GFP_KERNEL | GFP_DMA);
1044         if (!iob->data) {
1045                 kfree(iob);
1046                 return NULL;
1047         }
1048
1049         init_completion(&iob->done);
1050         spin_lock_init(&iob->lock);
1051         refcount_set(&iob->ref_count, 1);
1052         iob->channel = channel;
1053         iob->timeout = timeout;
1054         iob->length = length;
1055         return iob;
1056 }
1057 EXPORT_SYMBOL_GPL(qeth_alloc_cmd);
1058
1059 static void qeth_issue_next_read_cb(struct qeth_card *card,
1060                                     struct qeth_cmd_buffer *iob,
1061                                     unsigned int data_length)
1062 {
1063         struct qeth_cmd_buffer *request = NULL;
1064         struct qeth_ipa_cmd *cmd = NULL;
1065         struct qeth_reply *reply = NULL;
1066         struct qeth_cmd_buffer *tmp;
1067         unsigned long flags;
1068         int rc = 0;
1069
1070         QETH_CARD_TEXT(card, 4, "sndctlcb");
1071         rc = qeth_check_idx_response(card, iob->data);
1072         switch (rc) {
1073         case 0:
1074                 break;
1075         case -EIO:
1076                 qeth_schedule_recovery(card);
1077                 fallthrough;
1078         default:
1079                 qeth_clear_ipacmd_list(card);
1080                 goto err_idx;
1081         }
1082
1083         cmd = __ipa_reply(iob);
1084         if (cmd) {
1085                 cmd = qeth_check_ipa_data(card, cmd);
1086                 if (!cmd)
1087                         goto out;
1088                 if (IS_OSN(card) && card->osn_info.assist_cb &&
1089                     cmd->hdr.command != IPA_CMD_STARTLAN) {
1090                         card->osn_info.assist_cb(card->dev, cmd);
1091                         goto out;
1092                 }
1093         }
1094
1095         /* match against pending cmd requests */
1096         spin_lock_irqsave(&card->lock, flags);
1097         list_for_each_entry(tmp, &card->cmd_waiter_list, list_entry) {
1098                 if (tmp->match && tmp->match(tmp, iob)) {
1099                         request = tmp;
1100                         /* take the object outside the lock */
1101                         qeth_get_cmd(request);
1102                         break;
1103                 }
1104         }
1105         spin_unlock_irqrestore(&card->lock, flags);
1106
1107         if (!request)
1108                 goto out;
1109
1110         reply = &request->reply;
1111         if (!reply->callback) {
1112                 rc = 0;
1113                 goto no_callback;
1114         }
1115
1116         spin_lock_irqsave(&request->lock, flags);
1117         if (request->rc)
1118                 /* Bail out when the requestor has already left: */
1119                 rc = request->rc;
1120         else
1121                 rc = reply->callback(card, reply, cmd ? (unsigned long)cmd :
1122                                                         (unsigned long)iob);
1123         spin_unlock_irqrestore(&request->lock, flags);
1124
1125 no_callback:
1126         if (rc <= 0)
1127                 qeth_notify_cmd(request, rc);
1128         qeth_put_cmd(request);
1129 out:
1130         memcpy(&card->seqno.pdu_hdr_ack,
1131                 QETH_PDU_HEADER_SEQ_NO(iob->data),
1132                 QETH_SEQ_NO_LENGTH);
1133         __qeth_issue_next_read(card);
1134 err_idx:
1135         qeth_put_cmd(iob);
1136 }
1137
1138 static int qeth_set_thread_start_bit(struct qeth_card *card,
1139                 unsigned long thread)
1140 {
1141         unsigned long flags;
1142         int rc = 0;
1143
1144         spin_lock_irqsave(&card->thread_mask_lock, flags);
1145         if (!(card->thread_allowed_mask & thread))
1146                 rc = -EPERM;
1147         else if (card->thread_start_mask & thread)
1148                 rc = -EBUSY;
1149         else
1150                 card->thread_start_mask |= thread;
1151         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1152
1153         return rc;
1154 }
1155
1156 static void qeth_clear_thread_start_bit(struct qeth_card *card,
1157                                         unsigned long thread)
1158 {
1159         unsigned long flags;
1160
1161         spin_lock_irqsave(&card->thread_mask_lock, flags);
1162         card->thread_start_mask &= ~thread;
1163         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1164         wake_up(&card->wait_q);
1165 }
1166
1167 static void qeth_clear_thread_running_bit(struct qeth_card *card,
1168                                           unsigned long thread)
1169 {
1170         unsigned long flags;
1171
1172         spin_lock_irqsave(&card->thread_mask_lock, flags);
1173         card->thread_running_mask &= ~thread;
1174         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1175         wake_up_all(&card->wait_q);
1176 }
1177
1178 static int __qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
1179 {
1180         unsigned long flags;
1181         int rc = 0;
1182
1183         spin_lock_irqsave(&card->thread_mask_lock, flags);
1184         if (card->thread_start_mask & thread) {
1185                 if ((card->thread_allowed_mask & thread) &&
1186                     !(card->thread_running_mask & thread)) {
1187                         rc = 1;
1188                         card->thread_start_mask &= ~thread;
1189                         card->thread_running_mask |= thread;
1190                 } else
1191                         rc = -EPERM;
1192         }
1193         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1194         return rc;
1195 }
1196
1197 static int qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
1198 {
1199         int rc = 0;
1200
1201         wait_event(card->wait_q,
1202                    (rc = __qeth_do_run_thread(card, thread)) >= 0);
1203         return rc;
1204 }
1205
1206 int qeth_schedule_recovery(struct qeth_card *card)
1207 {
1208         int rc;
1209
1210         QETH_CARD_TEXT(card, 2, "startrec");
1211
1212         rc = qeth_set_thread_start_bit(card, QETH_RECOVER_THREAD);
1213         if (!rc)
1214                 schedule_work(&card->kernel_thread_starter);
1215
1216         return rc;
1217 }
1218
1219 static int qeth_get_problem(struct qeth_card *card, struct ccw_device *cdev,
1220                             struct irb *irb)
1221 {
1222         int dstat, cstat;
1223         char *sense;
1224
1225         sense = (char *) irb->ecw;
1226         cstat = irb->scsw.cmd.cstat;
1227         dstat = irb->scsw.cmd.dstat;
1228
1229         if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK |
1230                      SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK |
1231                      SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) {
1232                 QETH_CARD_TEXT(card, 2, "CGENCHK");
1233                 dev_warn(&cdev->dev, "The qeth device driver "
1234                         "failed to recover an error on the device\n");
1235                 QETH_DBF_MESSAGE(2, "check on channel %x with dstat=%#x, cstat=%#x\n",
1236                                  CCW_DEVID(cdev), dstat, cstat);
1237                 print_hex_dump(KERN_WARNING, "qeth: irb ", DUMP_PREFIX_OFFSET,
1238                                 16, 1, irb, 64, 1);
1239                 return -EIO;
1240         }
1241
1242         if (dstat & DEV_STAT_UNIT_CHECK) {
1243                 if (sense[SENSE_RESETTING_EVENT_BYTE] &
1244                     SENSE_RESETTING_EVENT_FLAG) {
1245                         QETH_CARD_TEXT(card, 2, "REVIND");
1246                         return -EIO;
1247                 }
1248                 if (sense[SENSE_COMMAND_REJECT_BYTE] &
1249                     SENSE_COMMAND_REJECT_FLAG) {
1250                         QETH_CARD_TEXT(card, 2, "CMDREJi");
1251                         return -EIO;
1252                 }
1253                 if ((sense[2] == 0xaf) && (sense[3] == 0xfe)) {
1254                         QETH_CARD_TEXT(card, 2, "AFFE");
1255                         return -EIO;
1256                 }
1257                 if ((!sense[0]) && (!sense[1]) && (!sense[2]) && (!sense[3])) {
1258                         QETH_CARD_TEXT(card, 2, "ZEROSEN");
1259                         return 0;
1260                 }
1261                 QETH_CARD_TEXT(card, 2, "DGENCHK");
1262                 return -EIO;
1263         }
1264         return 0;
1265 }
1266
1267 static int qeth_check_irb_error(struct qeth_card *card, struct ccw_device *cdev,
1268                                 struct irb *irb)
1269 {
1270         if (!IS_ERR(irb))
1271                 return 0;
1272
1273         switch (PTR_ERR(irb)) {
1274         case -EIO:
1275                 QETH_DBF_MESSAGE(2, "i/o-error on channel %x\n",
1276                                  CCW_DEVID(cdev));
1277                 QETH_CARD_TEXT(card, 2, "ckirberr");
1278                 QETH_CARD_TEXT_(card, 2, "  rc%d", -EIO);
1279                 return -EIO;
1280         case -ETIMEDOUT:
1281                 dev_warn(&cdev->dev, "A hardware operation timed out"
1282                         " on the device\n");
1283                 QETH_CARD_TEXT(card, 2, "ckirberr");
1284                 QETH_CARD_TEXT_(card, 2, "  rc%d", -ETIMEDOUT);
1285                 return -ETIMEDOUT;
1286         default:
1287                 QETH_DBF_MESSAGE(2, "unknown error %ld on channel %x\n",
1288                                  PTR_ERR(irb), CCW_DEVID(cdev));
1289                 QETH_CARD_TEXT(card, 2, "ckirberr");
1290                 QETH_CARD_TEXT(card, 2, "  rc???");
1291                 return PTR_ERR(irb);
1292         }
1293 }
1294
1295 static void qeth_irq(struct ccw_device *cdev, unsigned long intparm,
1296                 struct irb *irb)
1297 {
1298         int rc;
1299         int cstat, dstat;
1300         struct qeth_cmd_buffer *iob = NULL;
1301         struct ccwgroup_device *gdev;
1302         struct qeth_channel *channel;
1303         struct qeth_card *card;
1304
1305         /* while we hold the ccwdev lock, this stays valid: */
1306         gdev = dev_get_drvdata(&cdev->dev);
1307         card = dev_get_drvdata(&gdev->dev);
1308
1309         QETH_CARD_TEXT(card, 5, "irq");
1310
1311         if (card->read.ccwdev == cdev) {
1312                 channel = &card->read;
1313                 QETH_CARD_TEXT(card, 5, "read");
1314         } else if (card->write.ccwdev == cdev) {
1315                 channel = &card->write;
1316                 QETH_CARD_TEXT(card, 5, "write");
1317         } else {
1318                 channel = &card->data;
1319                 QETH_CARD_TEXT(card, 5, "data");
1320         }
1321
1322         if (intparm == 0) {
1323                 QETH_CARD_TEXT(card, 5, "irqunsol");
1324         } else if ((addr_t)intparm != (addr_t)channel->active_cmd) {
1325                 QETH_CARD_TEXT(card, 5, "irqunexp");
1326
1327                 dev_err(&cdev->dev,
1328                         "Received IRQ with intparm %lx, expected %px\n",
1329                         intparm, channel->active_cmd);
1330                 if (channel->active_cmd)
1331                         qeth_cancel_cmd(channel->active_cmd, -EIO);
1332         } else {
1333                 iob = (struct qeth_cmd_buffer *) (addr_t)intparm;
1334         }
1335
1336         channel->active_cmd = NULL;
1337         qeth_unlock_channel(card, channel);
1338
1339         rc = qeth_check_irb_error(card, cdev, irb);
1340         if (rc) {
1341                 /* IO was terminated, free its resources. */
1342                 if (iob)
1343                         qeth_cancel_cmd(iob, rc);
1344                 return;
1345         }
1346
1347         if (irb->scsw.cmd.fctl & SCSW_FCTL_CLEAR_FUNC) {
1348                 channel->state = CH_STATE_STOPPED;
1349                 wake_up(&card->wait_q);
1350         }
1351
1352         if (irb->scsw.cmd.fctl & SCSW_FCTL_HALT_FUNC) {
1353                 channel->state = CH_STATE_HALTED;
1354                 wake_up(&card->wait_q);
1355         }
1356
1357         if (iob && (irb->scsw.cmd.fctl & (SCSW_FCTL_CLEAR_FUNC |
1358                                           SCSW_FCTL_HALT_FUNC))) {
1359                 qeth_cancel_cmd(iob, -ECANCELED);
1360                 iob = NULL;
1361         }
1362
1363         cstat = irb->scsw.cmd.cstat;
1364         dstat = irb->scsw.cmd.dstat;
1365
1366         if ((dstat & DEV_STAT_UNIT_EXCEP) ||
1367             (dstat & DEV_STAT_UNIT_CHECK) ||
1368             (cstat)) {
1369                 if (irb->esw.esw0.erw.cons) {
1370                         dev_warn(&channel->ccwdev->dev,
1371                                 "The qeth device driver failed to recover "
1372                                 "an error on the device\n");
1373                         QETH_DBF_MESSAGE(2, "sense data available on channel %x: cstat %#X dstat %#X\n",
1374                                          CCW_DEVID(channel->ccwdev), cstat,
1375                                          dstat);
1376                         print_hex_dump(KERN_WARNING, "qeth: irb ",
1377                                 DUMP_PREFIX_OFFSET, 16, 1, irb, 32, 1);
1378                         print_hex_dump(KERN_WARNING, "qeth: sense data ",
1379                                 DUMP_PREFIX_OFFSET, 16, 1, irb->ecw, 32, 1);
1380                 }
1381
1382                 rc = qeth_get_problem(card, cdev, irb);
1383                 if (rc) {
1384                         card->read_or_write_problem = 1;
1385                         if (iob)
1386                                 qeth_cancel_cmd(iob, rc);
1387                         qeth_clear_ipacmd_list(card);
1388                         qeth_schedule_recovery(card);
1389                         return;
1390                 }
1391         }
1392
1393         if (iob) {
1394                 /* sanity check: */
1395                 if (irb->scsw.cmd.count > iob->length) {
1396                         qeth_cancel_cmd(iob, -EIO);
1397                         return;
1398                 }
1399                 if (iob->callback)
1400                         iob->callback(card, iob,
1401                                       iob->length - irb->scsw.cmd.count);
1402         }
1403 }
1404
1405 static void qeth_notify_skbs(struct qeth_qdio_out_q *q,
1406                 struct qeth_qdio_out_buffer *buf,
1407                 enum iucv_tx_notify notification)
1408 {
1409         struct sk_buff *skb;
1410
1411         skb_queue_walk(&buf->skb_list, skb) {
1412                 struct sock *sk = skb->sk;
1413
1414                 QETH_CARD_TEXT_(q->card, 5, "skbn%d", notification);
1415                 QETH_CARD_TEXT_(q->card, 5, "%lx", (long) skb);
1416                 if (sk && sk->sk_family == PF_IUCV)
1417                         iucv_sk(sk)->sk_txnotify(sk, notification);
1418         }
1419 }
1420
1421 static void qeth_tx_complete_buf(struct qeth_qdio_out_buffer *buf, bool error,
1422                                  int budget)
1423 {
1424         struct qeth_qdio_out_q *queue = buf->q;
1425         struct sk_buff *skb;
1426
1427         if (atomic_read(&buf->state) == QETH_QDIO_BUF_PENDING)
1428                 qeth_notify_skbs(queue, buf, TX_NOTIFY_GENERALERROR);
1429
1430         /* Empty buffer? */
1431         if (buf->next_element_to_fill == 0)
1432                 return;
1433
1434         QETH_TXQ_STAT_INC(queue, bufs);
1435         QETH_TXQ_STAT_ADD(queue, buf_elements, buf->next_element_to_fill);
1436         if (error) {
1437                 QETH_TXQ_STAT_ADD(queue, tx_errors, buf->frames);
1438         } else {
1439                 QETH_TXQ_STAT_ADD(queue, tx_packets, buf->frames);
1440                 QETH_TXQ_STAT_ADD(queue, tx_bytes, buf->bytes);
1441         }
1442
1443         while ((skb = __skb_dequeue(&buf->skb_list)) != NULL) {
1444                 unsigned int bytes = qdisc_pkt_len(skb);
1445                 bool is_tso = skb_is_gso(skb);
1446                 unsigned int packets;
1447
1448                 packets = is_tso ? skb_shinfo(skb)->gso_segs : 1;
1449                 if (!error) {
1450                         if (skb->ip_summed == CHECKSUM_PARTIAL)
1451                                 QETH_TXQ_STAT_ADD(queue, skbs_csum, packets);
1452                         if (skb_is_nonlinear(skb))
1453                                 QETH_TXQ_STAT_INC(queue, skbs_sg);
1454                         if (is_tso) {
1455                                 QETH_TXQ_STAT_INC(queue, skbs_tso);
1456                                 QETH_TXQ_STAT_ADD(queue, tso_bytes, bytes);
1457                         }
1458                 }
1459
1460                 napi_consume_skb(skb, budget);
1461         }
1462 }
1463
1464 static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
1465                                      struct qeth_qdio_out_buffer *buf,
1466                                      bool error, int budget)
1467 {
1468         int i;
1469
1470         /* is PCI flag set on buffer? */
1471         if (buf->buffer->element[0].sflags & SBAL_SFLAGS0_PCI_REQ)
1472                 atomic_dec(&queue->set_pci_flags_count);
1473
1474         qeth_tx_complete_buf(buf, error, budget);
1475
1476         for (i = 0; i < queue->max_elements; ++i) {
1477                 void *data = phys_to_virt(buf->buffer->element[i].addr);
1478
1479                 if (data && buf->is_header[i])
1480                         kmem_cache_free(qeth_core_header_cache, data);
1481                 buf->is_header[i] = 0;
1482         }
1483
1484         qeth_scrub_qdio_buffer(buf->buffer, queue->max_elements);
1485         buf->next_element_to_fill = 0;
1486         buf->frames = 0;
1487         buf->bytes = 0;
1488         atomic_set(&buf->state, QETH_QDIO_BUF_EMPTY);
1489 }
1490
1491 static void qeth_drain_output_queue(struct qeth_qdio_out_q *q, bool free)
1492 {
1493         int j;
1494
1495         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
1496                 if (!q->bufs[j])
1497                         continue;
1498                 qeth_cleanup_handled_pending(q, j, 1);
1499                 qeth_clear_output_buffer(q, q->bufs[j], true, 0);
1500                 if (free) {
1501                         kmem_cache_free(qeth_qdio_outbuf_cache, q->bufs[j]);
1502                         q->bufs[j] = NULL;
1503                 }
1504         }
1505 }
1506
1507 static void qeth_drain_output_queues(struct qeth_card *card)
1508 {
1509         int i;
1510
1511         QETH_CARD_TEXT(card, 2, "clearqdbf");
1512         /* clear outbound buffers to free skbs */
1513         for (i = 0; i < card->qdio.no_out_queues; ++i) {
1514                 if (card->qdio.out_qs[i])
1515                         qeth_drain_output_queue(card->qdio.out_qs[i], false);
1516         }
1517 }
1518
1519 static void qeth_osa_set_output_queues(struct qeth_card *card, bool single)
1520 {
1521         unsigned int max = single ? 1 : card->dev->num_tx_queues;
1522
1523         if (card->qdio.no_out_queues == max)
1524                 return;
1525
1526         if (atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED)
1527                 qeth_free_qdio_queues(card);
1528
1529         if (max == 1 && card->qdio.do_prio_queueing != QETH_PRIOQ_DEFAULT)
1530                 dev_info(&card->gdev->dev, "Priority Queueing not supported\n");
1531
1532         card->qdio.no_out_queues = max;
1533 }
1534
1535 static int qeth_update_from_chp_desc(struct qeth_card *card)
1536 {
1537         struct ccw_device *ccwdev;
1538         struct channel_path_desc_fmt0 *chp_dsc;
1539
1540         QETH_CARD_TEXT(card, 2, "chp_desc");
1541
1542         ccwdev = card->data.ccwdev;
1543         chp_dsc = ccw_device_get_chp_desc(ccwdev, 0);
1544         if (!chp_dsc)
1545                 return -ENOMEM;
1546
1547         card->info.func_level = 0x4100 + chp_dsc->desc;
1548
1549         if (IS_OSD(card) || IS_OSX(card))
1550                 /* CHPP field bit 6 == 1 -> single queue */
1551                 qeth_osa_set_output_queues(card, chp_dsc->chpp & 0x02);
1552
1553         kfree(chp_dsc);
1554         QETH_CARD_TEXT_(card, 2, "nr:%x", card->qdio.no_out_queues);
1555         QETH_CARD_TEXT_(card, 2, "lvl:%02x", card->info.func_level);
1556         return 0;
1557 }
1558
1559 static void qeth_init_qdio_info(struct qeth_card *card)
1560 {
1561         QETH_CARD_TEXT(card, 4, "intqdinf");
1562         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
1563         card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT;
1564         card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
1565
1566         /* inbound */
1567         card->qdio.no_in_queues = 1;
1568         card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
1569         if (IS_IQD(card))
1570                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_HSDEFAULT;
1571         else
1572                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_DEFAULT;
1573         card->qdio.in_buf_pool.buf_count = card->qdio.init_pool.buf_count;
1574         INIT_LIST_HEAD(&card->qdio.in_buf_pool.entry_list);
1575         INIT_LIST_HEAD(&card->qdio.init_pool.entry_list);
1576 }
1577
1578 static void qeth_set_initial_options(struct qeth_card *card)
1579 {
1580         card->options.route4.type = NO_ROUTER;
1581         card->options.route6.type = NO_ROUTER;
1582         card->options.isolation = ISOLATION_MODE_NONE;
1583         card->options.cq = QETH_CQ_DISABLED;
1584         card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
1585 }
1586
1587 static int qeth_do_start_thread(struct qeth_card *card, unsigned long thread)
1588 {
1589         unsigned long flags;
1590         int rc = 0;
1591
1592         spin_lock_irqsave(&card->thread_mask_lock, flags);
1593         QETH_CARD_TEXT_(card, 4, "  %02x%02x%02x",
1594                         (u8) card->thread_start_mask,
1595                         (u8) card->thread_allowed_mask,
1596                         (u8) card->thread_running_mask);
1597         rc = (card->thread_start_mask & thread);
1598         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1599         return rc;
1600 }
1601
1602 static int qeth_do_reset(void *data);
1603 static void qeth_start_kernel_thread(struct work_struct *work)
1604 {
1605         struct task_struct *ts;
1606         struct qeth_card *card = container_of(work, struct qeth_card,
1607                                         kernel_thread_starter);
1608         QETH_CARD_TEXT(card, 2, "strthrd");
1609
1610         if (card->read.state != CH_STATE_UP &&
1611             card->write.state != CH_STATE_UP)
1612                 return;
1613         if (qeth_do_start_thread(card, QETH_RECOVER_THREAD)) {
1614                 ts = kthread_run(qeth_do_reset, card, "qeth_recover");
1615                 if (IS_ERR(ts)) {
1616                         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1617                         qeth_clear_thread_running_bit(card,
1618                                 QETH_RECOVER_THREAD);
1619                 }
1620         }
1621 }
1622
1623 static void qeth_buffer_reclaim_work(struct work_struct *);
1624 static void qeth_setup_card(struct qeth_card *card)
1625 {
1626         QETH_CARD_TEXT(card, 2, "setupcrd");
1627
1628         card->info.type = CARD_RDEV(card)->id.driver_info;
1629         card->state = CARD_STATE_DOWN;
1630         spin_lock_init(&card->lock);
1631         spin_lock_init(&card->thread_mask_lock);
1632         mutex_init(&card->conf_mutex);
1633         mutex_init(&card->discipline_mutex);
1634         INIT_WORK(&card->kernel_thread_starter, qeth_start_kernel_thread);
1635         INIT_LIST_HEAD(&card->cmd_waiter_list);
1636         init_waitqueue_head(&card->wait_q);
1637         qeth_set_initial_options(card);
1638         /* IP address takeover */
1639         INIT_LIST_HEAD(&card->ipato.entries);
1640         qeth_init_qdio_info(card);
1641         INIT_DELAYED_WORK(&card->buffer_reclaim_work, qeth_buffer_reclaim_work);
1642         INIT_WORK(&card->close_dev_work, qeth_close_dev_handler);
1643         hash_init(card->rx_mode_addrs);
1644         hash_init(card->local_addrs4);
1645         hash_init(card->local_addrs6);
1646         spin_lock_init(&card->local_addrs4_lock);
1647         spin_lock_init(&card->local_addrs6_lock);
1648 }
1649
1650 static void qeth_core_sl_print(struct seq_file *m, struct service_level *slr)
1651 {
1652         struct qeth_card *card = container_of(slr, struct qeth_card,
1653                                         qeth_service_level);
1654         if (card->info.mcl_level[0])
1655                 seq_printf(m, "qeth: %s firmware level %s\n",
1656                         CARD_BUS_ID(card), card->info.mcl_level);
1657 }
1658
1659 static struct qeth_card *qeth_alloc_card(struct ccwgroup_device *gdev)
1660 {
1661         struct qeth_card *card;
1662
1663         QETH_DBF_TEXT(SETUP, 2, "alloccrd");
1664         card = kzalloc(sizeof(*card), GFP_KERNEL);
1665         if (!card)
1666                 goto out;
1667         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1668
1669         card->gdev = gdev;
1670         dev_set_drvdata(&gdev->dev, card);
1671         CARD_RDEV(card) = gdev->cdev[0];
1672         CARD_WDEV(card) = gdev->cdev[1];
1673         CARD_DDEV(card) = gdev->cdev[2];
1674
1675         card->event_wq = alloc_ordered_workqueue("%s_event", 0,
1676                                                  dev_name(&gdev->dev));
1677         if (!card->event_wq)
1678                 goto out_wq;
1679
1680         card->read_cmd = qeth_alloc_cmd(&card->read, QETH_BUFSIZE, 1, 0);
1681         if (!card->read_cmd)
1682                 goto out_read_cmd;
1683
1684         card->debugfs = debugfs_create_dir(dev_name(&gdev->dev),
1685                                            qeth_debugfs_root);
1686         debugfs_create_file("local_addrs", 0400, card->debugfs, card,
1687                             &qeth_debugfs_local_addr_fops);
1688
1689         card->qeth_service_level.seq_print = qeth_core_sl_print;
1690         register_service_level(&card->qeth_service_level);
1691         return card;
1692
1693 out_read_cmd:
1694         destroy_workqueue(card->event_wq);
1695 out_wq:
1696         dev_set_drvdata(&gdev->dev, NULL);
1697         kfree(card);
1698 out:
1699         return NULL;
1700 }
1701
1702 static int qeth_clear_channel(struct qeth_card *card,
1703                               struct qeth_channel *channel)
1704 {
1705         int rc;
1706
1707         QETH_CARD_TEXT(card, 3, "clearch");
1708         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1709         rc = ccw_device_clear(channel->ccwdev, (addr_t)channel->active_cmd);
1710         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1711
1712         if (rc)
1713                 return rc;
1714         rc = wait_event_interruptible_timeout(card->wait_q,
1715                         channel->state == CH_STATE_STOPPED, QETH_TIMEOUT);
1716         if (rc == -ERESTARTSYS)
1717                 return rc;
1718         if (channel->state != CH_STATE_STOPPED)
1719                 return -ETIME;
1720         channel->state = CH_STATE_DOWN;
1721         return 0;
1722 }
1723
1724 static int qeth_halt_channel(struct qeth_card *card,
1725                              struct qeth_channel *channel)
1726 {
1727         int rc;
1728
1729         QETH_CARD_TEXT(card, 3, "haltch");
1730         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1731         rc = ccw_device_halt(channel->ccwdev, (addr_t)channel->active_cmd);
1732         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1733
1734         if (rc)
1735                 return rc;
1736         rc = wait_event_interruptible_timeout(card->wait_q,
1737                         channel->state == CH_STATE_HALTED, QETH_TIMEOUT);
1738         if (rc == -ERESTARTSYS)
1739                 return rc;
1740         if (channel->state != CH_STATE_HALTED)
1741                 return -ETIME;
1742         return 0;
1743 }
1744
1745 static int qeth_stop_channel(struct qeth_channel *channel)
1746 {
1747         struct ccw_device *cdev = channel->ccwdev;
1748         int rc;
1749
1750         rc = ccw_device_set_offline(cdev);
1751
1752         spin_lock_irq(get_ccwdev_lock(cdev));
1753         if (channel->active_cmd) {
1754                 dev_err(&cdev->dev, "Stopped channel while cmd %px was still active\n",
1755                         channel->active_cmd);
1756                 channel->active_cmd = NULL;
1757         }
1758         cdev->handler = NULL;
1759         spin_unlock_irq(get_ccwdev_lock(cdev));
1760
1761         return rc;
1762 }
1763
1764 static int qeth_start_channel(struct qeth_channel *channel)
1765 {
1766         struct ccw_device *cdev = channel->ccwdev;
1767         int rc;
1768
1769         channel->state = CH_STATE_DOWN;
1770         atomic_set(&channel->irq_pending, 0);
1771
1772         spin_lock_irq(get_ccwdev_lock(cdev));
1773         cdev->handler = qeth_irq;
1774         spin_unlock_irq(get_ccwdev_lock(cdev));
1775
1776         rc = ccw_device_set_online(cdev);
1777         if (rc)
1778                 goto err;
1779
1780         return 0;
1781
1782 err:
1783         spin_lock_irq(get_ccwdev_lock(cdev));
1784         cdev->handler = NULL;
1785         spin_unlock_irq(get_ccwdev_lock(cdev));
1786         return rc;
1787 }
1788
1789 static int qeth_halt_channels(struct qeth_card *card)
1790 {
1791         int rc1 = 0, rc2 = 0, rc3 = 0;
1792
1793         QETH_CARD_TEXT(card, 3, "haltchs");
1794         rc1 = qeth_halt_channel(card, &card->read);
1795         rc2 = qeth_halt_channel(card, &card->write);
1796         rc3 = qeth_halt_channel(card, &card->data);
1797         if (rc1)
1798                 return rc1;
1799         if (rc2)
1800                 return rc2;
1801         return rc3;
1802 }
1803
1804 static int qeth_clear_channels(struct qeth_card *card)
1805 {
1806         int rc1 = 0, rc2 = 0, rc3 = 0;
1807
1808         QETH_CARD_TEXT(card, 3, "clearchs");
1809         rc1 = qeth_clear_channel(card, &card->read);
1810         rc2 = qeth_clear_channel(card, &card->write);
1811         rc3 = qeth_clear_channel(card, &card->data);
1812         if (rc1)
1813                 return rc1;
1814         if (rc2)
1815                 return rc2;
1816         return rc3;
1817 }
1818
1819 static int qeth_clear_halt_card(struct qeth_card *card, int halt)
1820 {
1821         int rc = 0;
1822
1823         QETH_CARD_TEXT(card, 3, "clhacrd");
1824
1825         if (halt)
1826                 rc = qeth_halt_channels(card);
1827         if (rc)
1828                 return rc;
1829         return qeth_clear_channels(card);
1830 }
1831
1832 static int qeth_qdio_clear_card(struct qeth_card *card, int use_halt)
1833 {
1834         int rc = 0;
1835
1836         QETH_CARD_TEXT(card, 3, "qdioclr");
1837         switch (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ESTABLISHED,
1838                 QETH_QDIO_CLEANING)) {
1839         case QETH_QDIO_ESTABLISHED:
1840                 if (IS_IQD(card))
1841                         rc = qdio_shutdown(CARD_DDEV(card),
1842                                 QDIO_FLAG_CLEANUP_USING_HALT);
1843                 else
1844                         rc = qdio_shutdown(CARD_DDEV(card),
1845                                 QDIO_FLAG_CLEANUP_USING_CLEAR);
1846                 if (rc)
1847                         QETH_CARD_TEXT_(card, 3, "1err%d", rc);
1848                 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
1849                 break;
1850         case QETH_QDIO_CLEANING:
1851                 return rc;
1852         default:
1853                 break;
1854         }
1855         rc = qeth_clear_halt_card(card, use_halt);
1856         if (rc)
1857                 QETH_CARD_TEXT_(card, 3, "2err%d", rc);
1858         return rc;
1859 }
1860
1861 static enum qeth_discipline_id qeth_vm_detect_layer(struct qeth_card *card)
1862 {
1863         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1864         struct diag26c_vnic_resp *response = NULL;
1865         struct diag26c_vnic_req *request = NULL;
1866         struct ccw_dev_id id;
1867         char userid[80];
1868         int rc = 0;
1869
1870         QETH_CARD_TEXT(card, 2, "vmlayer");
1871
1872         cpcmd("QUERY USERID", userid, sizeof(userid), &rc);
1873         if (rc)
1874                 goto out;
1875
1876         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
1877         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
1878         if (!request || !response) {
1879                 rc = -ENOMEM;
1880                 goto out;
1881         }
1882
1883         ccw_device_get_id(CARD_RDEV(card), &id);
1884         request->resp_buf_len = sizeof(*response);
1885         request->resp_version = DIAG26C_VERSION6_VM65918;
1886         request->req_format = DIAG26C_VNIC_INFO;
1887         ASCEBC(userid, 8);
1888         memcpy(&request->sys_name, userid, 8);
1889         request->devno = id.devno;
1890
1891         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1892         rc = diag26c(request, response, DIAG26C_PORT_VNIC);
1893         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1894         if (rc)
1895                 goto out;
1896         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
1897
1898         if (request->resp_buf_len < sizeof(*response) ||
1899             response->version != request->resp_version) {
1900                 rc = -EIO;
1901                 goto out;
1902         }
1903
1904         if (response->protocol == VNIC_INFO_PROT_L2)
1905                 disc = QETH_DISCIPLINE_LAYER2;
1906         else if (response->protocol == VNIC_INFO_PROT_L3)
1907                 disc = QETH_DISCIPLINE_LAYER3;
1908
1909 out:
1910         kfree(response);
1911         kfree(request);
1912         if (rc)
1913                 QETH_CARD_TEXT_(card, 2, "err%x", rc);
1914         return disc;
1915 }
1916
1917 /* Determine whether the device requires a specific layer discipline */
1918 static enum qeth_discipline_id qeth_enforce_discipline(struct qeth_card *card)
1919 {
1920         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1921
1922         if (IS_OSM(card) || IS_OSN(card))
1923                 disc = QETH_DISCIPLINE_LAYER2;
1924         else if (IS_VM_NIC(card))
1925                 disc = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
1926                                       qeth_vm_detect_layer(card);
1927
1928         switch (disc) {
1929         case QETH_DISCIPLINE_LAYER2:
1930                 QETH_CARD_TEXT(card, 3, "force l2");
1931                 break;
1932         case QETH_DISCIPLINE_LAYER3:
1933                 QETH_CARD_TEXT(card, 3, "force l3");
1934                 break;
1935         default:
1936                 QETH_CARD_TEXT(card, 3, "force no");
1937         }
1938
1939         return disc;
1940 }
1941
1942 static void qeth_set_blkt_defaults(struct qeth_card *card)
1943 {
1944         QETH_CARD_TEXT(card, 2, "cfgblkt");
1945
1946         if (card->info.use_v1_blkt) {
1947                 card->info.blkt.time_total = 0;
1948                 card->info.blkt.inter_packet = 0;
1949                 card->info.blkt.inter_packet_jumbo = 0;
1950         } else {
1951                 card->info.blkt.time_total = 250;
1952                 card->info.blkt.inter_packet = 5;
1953                 card->info.blkt.inter_packet_jumbo = 15;
1954         }
1955 }
1956
1957 static void qeth_idx_init(struct qeth_card *card)
1958 {
1959         memset(&card->seqno, 0, sizeof(card->seqno));
1960
1961         card->token.issuer_rm_w = 0x00010103UL;
1962         card->token.cm_filter_w = 0x00010108UL;
1963         card->token.cm_connection_w = 0x0001010aUL;
1964         card->token.ulp_filter_w = 0x0001010bUL;
1965         card->token.ulp_connection_w = 0x0001010dUL;
1966
1967         switch (card->info.type) {
1968         case QETH_CARD_TYPE_IQD:
1969                 card->info.func_level = QETH_IDX_FUNC_LEVEL_IQD;
1970                 break;
1971         case QETH_CARD_TYPE_OSD:
1972         case QETH_CARD_TYPE_OSN:
1973                 card->info.func_level = QETH_IDX_FUNC_LEVEL_OSD;
1974                 break;
1975         default:
1976                 break;
1977         }
1978 }
1979
1980 static void qeth_idx_finalize_cmd(struct qeth_card *card,
1981                                   struct qeth_cmd_buffer *iob)
1982 {
1983         memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data), &card->seqno.trans_hdr,
1984                QETH_SEQ_NO_LENGTH);
1985         if (iob->channel == &card->write)
1986                 card->seqno.trans_hdr++;
1987 }
1988
1989 static int qeth_peer_func_level(int level)
1990 {
1991         if ((level & 0xff) == 8)
1992                 return (level & 0xff) + 0x400;
1993         if (((level >> 8) & 3) == 1)
1994                 return (level & 0xff) + 0x200;
1995         return level;
1996 }
1997
1998 static void qeth_mpc_finalize_cmd(struct qeth_card *card,
1999                                   struct qeth_cmd_buffer *iob)
2000 {
2001         qeth_idx_finalize_cmd(card, iob);
2002
2003         memcpy(QETH_PDU_HEADER_SEQ_NO(iob->data),
2004                &card->seqno.pdu_hdr, QETH_SEQ_NO_LENGTH);
2005         card->seqno.pdu_hdr++;
2006         memcpy(QETH_PDU_HEADER_ACK_SEQ_NO(iob->data),
2007                &card->seqno.pdu_hdr_ack, QETH_SEQ_NO_LENGTH);
2008
2009         iob->callback = qeth_release_buffer_cb;
2010 }
2011
2012 static bool qeth_mpc_match_reply(struct qeth_cmd_buffer *iob,
2013                                  struct qeth_cmd_buffer *reply)
2014 {
2015         /* MPC cmds are issued strictly in sequence. */
2016         return !IS_IPA(reply->data);
2017 }
2018
2019 static struct qeth_cmd_buffer *qeth_mpc_alloc_cmd(struct qeth_card *card,
2020                                                   const void *data,
2021                                                   unsigned int data_length)
2022 {
2023         struct qeth_cmd_buffer *iob;
2024
2025         iob = qeth_alloc_cmd(&card->write, data_length, 1, QETH_TIMEOUT);
2026         if (!iob)
2027                 return NULL;
2028
2029         memcpy(iob->data, data, data_length);
2030         qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, data_length,
2031                        iob->data);
2032         iob->finalize = qeth_mpc_finalize_cmd;
2033         iob->match = qeth_mpc_match_reply;
2034         return iob;
2035 }
2036
2037 /**
2038  * qeth_send_control_data() -   send control command to the card
2039  * @card:                       qeth_card structure pointer
2040  * @iob:                        qeth_cmd_buffer pointer
2041  * @reply_cb:                   callback function pointer
2042  * @cb_card:                    pointer to the qeth_card structure
2043  * @cb_reply:                   pointer to the qeth_reply structure
2044  * @cb_cmd:                     pointer to the original iob for non-IPA
2045  *                              commands, or to the qeth_ipa_cmd structure
2046  *                              for the IPA commands.
2047  * @reply_param:                private pointer passed to the callback
2048  *
2049  * Callback function gets called one or more times, with cb_cmd
2050  * pointing to the response returned by the hardware. Callback
2051  * function must return
2052  *   > 0 if more reply blocks are expected,
2053  *     0 if the last or only reply block is received, and
2054  *   < 0 on error.
2055  * Callback function can get the value of the reply_param pointer from the
2056  * field 'param' of the structure qeth_reply.
2057  */
2058
2059 static int qeth_send_control_data(struct qeth_card *card,
2060                                   struct qeth_cmd_buffer *iob,
2061                                   int (*reply_cb)(struct qeth_card *cb_card,
2062                                                   struct qeth_reply *cb_reply,
2063                                                   unsigned long cb_cmd),
2064                                   void *reply_param)
2065 {
2066         struct qeth_channel *channel = iob->channel;
2067         struct qeth_reply *reply = &iob->reply;
2068         long timeout = iob->timeout;
2069         int rc;
2070
2071         QETH_CARD_TEXT(card, 2, "sendctl");
2072
2073         reply->callback = reply_cb;
2074         reply->param = reply_param;
2075
2076         timeout = wait_event_interruptible_timeout(card->wait_q,
2077                                                    qeth_trylock_channel(channel),
2078                                                    timeout);
2079         if (timeout <= 0) {
2080                 qeth_put_cmd(iob);
2081                 return (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
2082         }
2083
2084         if (iob->finalize)
2085                 iob->finalize(card, iob);
2086         QETH_DBF_HEX(CTRL, 2, iob->data, min(iob->length, QETH_DBF_CTRL_LEN));
2087
2088         qeth_enqueue_cmd(card, iob);
2089
2090         /* This pairs with iob->callback, and keeps the iob alive after IO: */
2091         qeth_get_cmd(iob);
2092
2093         QETH_CARD_TEXT(card, 6, "noirqpnd");
2094         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
2095         rc = ccw_device_start_timeout(channel->ccwdev, __ccw_from_cmd(iob),
2096                                       (addr_t) iob, 0, 0, timeout);
2097         if (!rc)
2098                 channel->active_cmd = iob;
2099         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
2100         if (rc) {
2101                 QETH_DBF_MESSAGE(2, "qeth_send_control_data on device %x: ccw_device_start rc = %i\n",
2102                                  CARD_DEVID(card), rc);
2103                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
2104                 qeth_dequeue_cmd(card, iob);
2105                 qeth_put_cmd(iob);
2106                 qeth_unlock_channel(card, channel);
2107                 goto out;
2108         }
2109
2110         timeout = wait_for_completion_interruptible_timeout(&iob->done,
2111                                                             timeout);
2112         if (timeout <= 0)
2113                 rc = (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
2114
2115         qeth_dequeue_cmd(card, iob);
2116
2117         if (reply_cb) {
2118                 /* Wait until the callback for a late reply has completed: */
2119                 spin_lock_irq(&iob->lock);
2120                 if (rc)
2121                         /* Zap any callback that's still pending: */
2122                         iob->rc = rc;
2123                 spin_unlock_irq(&iob->lock);
2124         }
2125
2126         if (!rc)
2127                 rc = iob->rc;
2128
2129 out:
2130         qeth_put_cmd(iob);
2131         return rc;
2132 }
2133
2134 struct qeth_node_desc {
2135         struct node_descriptor nd1;
2136         struct node_descriptor nd2;
2137         struct node_descriptor nd3;
2138 };
2139
2140 static void qeth_read_conf_data_cb(struct qeth_card *card,
2141                                    struct qeth_cmd_buffer *iob,
2142                                    unsigned int data_length)
2143 {
2144         struct qeth_node_desc *nd = (struct qeth_node_desc *) iob->data;
2145         int rc = 0;
2146         u8 *tag;
2147
2148         QETH_CARD_TEXT(card, 2, "cfgunit");
2149
2150         if (data_length < sizeof(*nd)) {
2151                 rc = -EINVAL;
2152                 goto out;
2153         }
2154
2155         card->info.is_vm_nic = nd->nd1.plant[0] == _ascebc['V'] &&
2156                                nd->nd1.plant[1] == _ascebc['M'];
2157         tag = (u8 *)&nd->nd1.tag;
2158         card->info.chpid = tag[0];
2159         card->info.unit_addr2 = tag[1];
2160
2161         tag = (u8 *)&nd->nd2.tag;
2162         card->info.cula = tag[1];
2163
2164         card->info.use_v1_blkt = nd->nd3.model[0] == 0xF0 &&
2165                                  nd->nd3.model[1] == 0xF0 &&
2166                                  nd->nd3.model[2] >= 0xF1 &&
2167                                  nd->nd3.model[2] <= 0xF4;
2168
2169 out:
2170         qeth_notify_cmd(iob, rc);
2171         qeth_put_cmd(iob);
2172 }
2173
2174 static int qeth_read_conf_data(struct qeth_card *card)
2175 {
2176         struct qeth_channel *channel = &card->data;
2177         struct qeth_cmd_buffer *iob;
2178         struct ciw *ciw;
2179
2180         /* scan for RCD command in extended SenseID data */
2181         ciw = ccw_device_get_ciw(channel->ccwdev, CIW_TYPE_RCD);
2182         if (!ciw || ciw->cmd == 0)
2183                 return -EOPNOTSUPP;
2184         if (ciw->count < sizeof(struct qeth_node_desc))
2185                 return -EINVAL;
2186
2187         iob = qeth_alloc_cmd(channel, ciw->count, 1, QETH_RCD_TIMEOUT);
2188         if (!iob)
2189                 return -ENOMEM;
2190
2191         iob->callback = qeth_read_conf_data_cb;
2192         qeth_setup_ccw(__ccw_from_cmd(iob), ciw->cmd, 0, iob->length,
2193                        iob->data);
2194
2195         return qeth_send_control_data(card, iob, NULL, NULL);
2196 }
2197
2198 static int qeth_idx_check_activate_response(struct qeth_card *card,
2199                                             struct qeth_channel *channel,
2200                                             struct qeth_cmd_buffer *iob)
2201 {
2202         int rc;
2203
2204         rc = qeth_check_idx_response(card, iob->data);
2205         if (rc)
2206                 return rc;
2207
2208         if (QETH_IS_IDX_ACT_POS_REPLY(iob->data))
2209                 return 0;
2210
2211         /* negative reply: */
2212         QETH_CARD_TEXT_(card, 2, "idxneg%c",
2213                         QETH_IDX_ACT_CAUSE_CODE(iob->data));
2214
2215         switch (QETH_IDX_ACT_CAUSE_CODE(iob->data)) {
2216         case QETH_IDX_ACT_ERR_EXCL:
2217                 dev_err(&channel->ccwdev->dev,
2218                         "The adapter is used exclusively by another host\n");
2219                 return -EBUSY;
2220         case QETH_IDX_ACT_ERR_AUTH:
2221         case QETH_IDX_ACT_ERR_AUTH_USER:
2222                 dev_err(&channel->ccwdev->dev,
2223                         "Setting the device online failed because of insufficient authorization\n");
2224                 return -EPERM;
2225         default:
2226                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: negative reply\n",
2227                                  CCW_DEVID(channel->ccwdev));
2228                 return -EIO;
2229         }
2230 }
2231
2232 static void qeth_idx_activate_read_channel_cb(struct qeth_card *card,
2233                                               struct qeth_cmd_buffer *iob,
2234                                               unsigned int data_length)
2235 {
2236         struct qeth_channel *channel = iob->channel;
2237         u16 peer_level;
2238         int rc;
2239
2240         QETH_CARD_TEXT(card, 2, "idxrdcb");
2241
2242         rc = qeth_idx_check_activate_response(card, channel, iob);
2243         if (rc)
2244                 goto out;
2245
2246         memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2247         if (peer_level != qeth_peer_func_level(card->info.func_level)) {
2248                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
2249                                  CCW_DEVID(channel->ccwdev),
2250                                  card->info.func_level, peer_level);
2251                 rc = -EINVAL;
2252                 goto out;
2253         }
2254
2255         memcpy(&card->token.issuer_rm_r,
2256                QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2257                QETH_MPC_TOKEN_LENGTH);
2258         memcpy(&card->info.mcl_level[0],
2259                QETH_IDX_REPLY_LEVEL(iob->data), QETH_MCL_LENGTH);
2260
2261 out:
2262         qeth_notify_cmd(iob, rc);
2263         qeth_put_cmd(iob);
2264 }
2265
2266 static void qeth_idx_activate_write_channel_cb(struct qeth_card *card,
2267                                                struct qeth_cmd_buffer *iob,
2268                                                unsigned int data_length)
2269 {
2270         struct qeth_channel *channel = iob->channel;
2271         u16 peer_level;
2272         int rc;
2273
2274         QETH_CARD_TEXT(card, 2, "idxwrcb");
2275
2276         rc = qeth_idx_check_activate_response(card, channel, iob);
2277         if (rc)
2278                 goto out;
2279
2280         memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2281         if ((peer_level & ~0x0100) !=
2282             qeth_peer_func_level(card->info.func_level)) {
2283                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
2284                                  CCW_DEVID(channel->ccwdev),
2285                                  card->info.func_level, peer_level);
2286                 rc = -EINVAL;
2287         }
2288
2289 out:
2290         qeth_notify_cmd(iob, rc);
2291         qeth_put_cmd(iob);
2292 }
2293
2294 static void qeth_idx_setup_activate_cmd(struct qeth_card *card,
2295                                         struct qeth_cmd_buffer *iob)
2296 {
2297         u16 addr = (card->info.cula << 8) + card->info.unit_addr2;
2298         u8 port = ((u8)card->dev->dev_port) | 0x80;
2299         struct ccw1 *ccw = __ccw_from_cmd(iob);
2300
2301         qeth_setup_ccw(&ccw[0], CCW_CMD_WRITE, CCW_FLAG_CC, IDX_ACTIVATE_SIZE,
2302                        iob->data);
2303         qeth_setup_ccw(&ccw[1], CCW_CMD_READ, 0, iob->length, iob->data);
2304         iob->finalize = qeth_idx_finalize_cmd;
2305
2306         port |= QETH_IDX_ACT_INVAL_FRAME;
2307         memcpy(QETH_IDX_ACT_PNO(iob->data), &port, 1);
2308         memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2309                &card->token.issuer_rm_w, QETH_MPC_TOKEN_LENGTH);
2310         memcpy(QETH_IDX_ACT_FUNC_LEVEL(iob->data),
2311                &card->info.func_level, 2);
2312         memcpy(QETH_IDX_ACT_QDIO_DEV_CUA(iob->data), &card->info.ddev_devno, 2);
2313         memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &addr, 2);
2314 }
2315
2316 static int qeth_idx_activate_read_channel(struct qeth_card *card)
2317 {
2318         struct qeth_channel *channel = &card->read;
2319         struct qeth_cmd_buffer *iob;
2320         int rc;
2321
2322         QETH_CARD_TEXT(card, 2, "idxread");
2323
2324         iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
2325         if (!iob)
2326                 return -ENOMEM;
2327
2328         memcpy(iob->data, IDX_ACTIVATE_READ, IDX_ACTIVATE_SIZE);
2329         qeth_idx_setup_activate_cmd(card, iob);
2330         iob->callback = qeth_idx_activate_read_channel_cb;
2331
2332         rc = qeth_send_control_data(card, iob, NULL, NULL);
2333         if (rc)
2334                 return rc;
2335
2336         channel->state = CH_STATE_UP;
2337         return 0;
2338 }
2339
2340 static int qeth_idx_activate_write_channel(struct qeth_card *card)
2341 {
2342         struct qeth_channel *channel = &card->write;
2343         struct qeth_cmd_buffer *iob;
2344         int rc;
2345
2346         QETH_CARD_TEXT(card, 2, "idxwrite");
2347
2348         iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
2349         if (!iob)
2350                 return -ENOMEM;
2351
2352         memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE);
2353         qeth_idx_setup_activate_cmd(card, iob);
2354         iob->callback = qeth_idx_activate_write_channel_cb;
2355
2356         rc = qeth_send_control_data(card, iob, NULL, NULL);
2357         if (rc)
2358                 return rc;
2359
2360         channel->state = CH_STATE_UP;
2361         return 0;
2362 }
2363
2364 static int qeth_cm_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2365                 unsigned long data)
2366 {
2367         struct qeth_cmd_buffer *iob;
2368
2369         QETH_CARD_TEXT(card, 2, "cmenblcb");
2370
2371         iob = (struct qeth_cmd_buffer *) data;
2372         memcpy(&card->token.cm_filter_r,
2373                QETH_CM_ENABLE_RESP_FILTER_TOKEN(iob->data),
2374                QETH_MPC_TOKEN_LENGTH);
2375         return 0;
2376 }
2377
2378 static int qeth_cm_enable(struct qeth_card *card)
2379 {
2380         struct qeth_cmd_buffer *iob;
2381
2382         QETH_CARD_TEXT(card, 2, "cmenable");
2383
2384         iob = qeth_mpc_alloc_cmd(card, CM_ENABLE, CM_ENABLE_SIZE);
2385         if (!iob)
2386                 return -ENOMEM;
2387
2388         memcpy(QETH_CM_ENABLE_ISSUER_RM_TOKEN(iob->data),
2389                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2390         memcpy(QETH_CM_ENABLE_FILTER_TOKEN(iob->data),
2391                &card->token.cm_filter_w, QETH_MPC_TOKEN_LENGTH);
2392
2393         return qeth_send_control_data(card, iob, qeth_cm_enable_cb, NULL);
2394 }
2395
2396 static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2397                 unsigned long data)
2398 {
2399         struct qeth_cmd_buffer *iob;
2400
2401         QETH_CARD_TEXT(card, 2, "cmsetpcb");
2402
2403         iob = (struct qeth_cmd_buffer *) data;
2404         memcpy(&card->token.cm_connection_r,
2405                QETH_CM_SETUP_RESP_DEST_ADDR(iob->data),
2406                QETH_MPC_TOKEN_LENGTH);
2407         return 0;
2408 }
2409
2410 static int qeth_cm_setup(struct qeth_card *card)
2411 {
2412         struct qeth_cmd_buffer *iob;
2413
2414         QETH_CARD_TEXT(card, 2, "cmsetup");
2415
2416         iob = qeth_mpc_alloc_cmd(card, CM_SETUP, CM_SETUP_SIZE);
2417         if (!iob)
2418                 return -ENOMEM;
2419
2420         memcpy(QETH_CM_SETUP_DEST_ADDR(iob->data),
2421                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2422         memcpy(QETH_CM_SETUP_CONNECTION_TOKEN(iob->data),
2423                &card->token.cm_connection_w, QETH_MPC_TOKEN_LENGTH);
2424         memcpy(QETH_CM_SETUP_FILTER_TOKEN(iob->data),
2425                &card->token.cm_filter_r, QETH_MPC_TOKEN_LENGTH);
2426         return qeth_send_control_data(card, iob, qeth_cm_setup_cb, NULL);
2427 }
2428
2429 static bool qeth_is_supported_link_type(struct qeth_card *card, u8 link_type)
2430 {
2431         if (link_type == QETH_LINK_TYPE_LANE_TR ||
2432             link_type == QETH_LINK_TYPE_HSTR) {
2433                 dev_err(&card->gdev->dev, "Unsupported Token Ring device\n");
2434                 return false;
2435         }
2436
2437         return true;
2438 }
2439
2440 static int qeth_update_max_mtu(struct qeth_card *card, unsigned int max_mtu)
2441 {
2442         struct net_device *dev = card->dev;
2443         unsigned int new_mtu;
2444
2445         if (!max_mtu) {
2446                 /* IQD needs accurate max MTU to set up its RX buffers: */
2447                 if (IS_IQD(card))
2448                         return -EINVAL;
2449                 /* tolerate quirky HW: */
2450                 max_mtu = ETH_MAX_MTU;
2451         }
2452
2453         rtnl_lock();
2454         if (IS_IQD(card)) {
2455                 /* move any device with default MTU to new max MTU: */
2456                 new_mtu = (dev->mtu == dev->max_mtu) ? max_mtu : dev->mtu;
2457
2458                 /* adjust RX buffer size to new max MTU: */
2459                 card->qdio.in_buf_size = max_mtu + 2 * PAGE_SIZE;
2460                 if (dev->max_mtu && dev->max_mtu != max_mtu)
2461                         qeth_free_qdio_queues(card);
2462         } else {
2463                 if (dev->mtu)
2464                         new_mtu = dev->mtu;
2465                 /* default MTUs for first setup: */
2466                 else if (IS_LAYER2(card))
2467                         new_mtu = ETH_DATA_LEN;
2468                 else
2469                         new_mtu = ETH_DATA_LEN - 8; /* allow for LLC + SNAP */
2470         }
2471
2472         dev->max_mtu = max_mtu;
2473         dev->mtu = min(new_mtu, max_mtu);
2474         rtnl_unlock();
2475         return 0;
2476 }
2477
2478 static int qeth_get_mtu_outof_framesize(int framesize)
2479 {
2480         switch (framesize) {
2481         case 0x4000:
2482                 return 8192;
2483         case 0x6000:
2484                 return 16384;
2485         case 0xa000:
2486                 return 32768;
2487         case 0xffff:
2488                 return 57344;
2489         default:
2490                 return 0;
2491         }
2492 }
2493
2494 static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2495                 unsigned long data)
2496 {
2497         __u16 mtu, framesize;
2498         __u16 len;
2499         struct qeth_cmd_buffer *iob;
2500         u8 link_type = 0;
2501
2502         QETH_CARD_TEXT(card, 2, "ulpenacb");
2503
2504         iob = (struct qeth_cmd_buffer *) data;
2505         memcpy(&card->token.ulp_filter_r,
2506                QETH_ULP_ENABLE_RESP_FILTER_TOKEN(iob->data),
2507                QETH_MPC_TOKEN_LENGTH);
2508         if (IS_IQD(card)) {
2509                 memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2);
2510                 mtu = qeth_get_mtu_outof_framesize(framesize);
2511         } else {
2512                 mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data);
2513         }
2514         *(u16 *)reply->param = mtu;
2515
2516         memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2);
2517         if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) {
2518                 memcpy(&link_type,
2519                        QETH_ULP_ENABLE_RESP_LINK_TYPE(iob->data), 1);
2520                 if (!qeth_is_supported_link_type(card, link_type))
2521                         return -EPROTONOSUPPORT;
2522         }
2523
2524         card->info.link_type = link_type;
2525         QETH_CARD_TEXT_(card, 2, "link%d", card->info.link_type);
2526         return 0;
2527 }
2528
2529 static u8 qeth_mpc_select_prot_type(struct qeth_card *card)
2530 {
2531         if (IS_OSN(card))
2532                 return QETH_PROT_OSN2;
2533         return IS_LAYER2(card) ? QETH_PROT_LAYER2 : QETH_PROT_TCPIP;
2534 }
2535
2536 static int qeth_ulp_enable(struct qeth_card *card)
2537 {
2538         u8 prot_type = qeth_mpc_select_prot_type(card);
2539         struct qeth_cmd_buffer *iob;
2540         u16 max_mtu;
2541         int rc;
2542
2543         QETH_CARD_TEXT(card, 2, "ulpenabl");
2544
2545         iob = qeth_mpc_alloc_cmd(card, ULP_ENABLE, ULP_ENABLE_SIZE);
2546         if (!iob)
2547                 return -ENOMEM;
2548
2549         *(QETH_ULP_ENABLE_LINKNUM(iob->data)) = (u8) card->dev->dev_port;
2550         memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1);
2551         memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data),
2552                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2553         memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data),
2554                &card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH);
2555         rc = qeth_send_control_data(card, iob, qeth_ulp_enable_cb, &max_mtu);
2556         if (rc)
2557                 return rc;
2558         return qeth_update_max_mtu(card, max_mtu);
2559 }
2560
2561 static int qeth_ulp_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2562                 unsigned long data)
2563 {
2564         struct qeth_cmd_buffer *iob;
2565
2566         QETH_CARD_TEXT(card, 2, "ulpstpcb");
2567
2568         iob = (struct qeth_cmd_buffer *) data;
2569         memcpy(&card->token.ulp_connection_r,
2570                QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2571                QETH_MPC_TOKEN_LENGTH);
2572         if (!strncmp("00S", QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2573                      3)) {
2574                 QETH_CARD_TEXT(card, 2, "olmlimit");
2575                 dev_err(&card->gdev->dev, "A connection could not be "
2576                         "established because of an OLM limit\n");
2577                 return -EMLINK;
2578         }
2579         return 0;
2580 }
2581
2582 static int qeth_ulp_setup(struct qeth_card *card)
2583 {
2584         __u16 temp;
2585         struct qeth_cmd_buffer *iob;
2586
2587         QETH_CARD_TEXT(card, 2, "ulpsetup");
2588
2589         iob = qeth_mpc_alloc_cmd(card, ULP_SETUP, ULP_SETUP_SIZE);
2590         if (!iob)
2591                 return -ENOMEM;
2592
2593         memcpy(QETH_ULP_SETUP_DEST_ADDR(iob->data),
2594                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2595         memcpy(QETH_ULP_SETUP_CONNECTION_TOKEN(iob->data),
2596                &card->token.ulp_connection_w, QETH_MPC_TOKEN_LENGTH);
2597         memcpy(QETH_ULP_SETUP_FILTER_TOKEN(iob->data),
2598                &card->token.ulp_filter_r, QETH_MPC_TOKEN_LENGTH);
2599
2600         memcpy(QETH_ULP_SETUP_CUA(iob->data), &card->info.ddev_devno, 2);
2601         temp = (card->info.cula << 8) + card->info.unit_addr2;
2602         memcpy(QETH_ULP_SETUP_REAL_DEVADDR(iob->data), &temp, 2);
2603         return qeth_send_control_data(card, iob, qeth_ulp_setup_cb, NULL);
2604 }
2605
2606 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *q, int bidx)
2607 {
2608         struct qeth_qdio_out_buffer *newbuf;
2609
2610         newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, GFP_ATOMIC);
2611         if (!newbuf)
2612                 return -ENOMEM;
2613
2614         newbuf->buffer = q->qdio_bufs[bidx];
2615         skb_queue_head_init(&newbuf->skb_list);
2616         lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key);
2617         newbuf->q = q;
2618         newbuf->next_pending = q->bufs[bidx];
2619         atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY);
2620         q->bufs[bidx] = newbuf;
2621         return 0;
2622 }
2623
2624 static void qeth_free_output_queue(struct qeth_qdio_out_q *q)
2625 {
2626         if (!q)
2627                 return;
2628
2629         qeth_drain_output_queue(q, true);
2630         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2631         kfree(q);
2632 }
2633
2634 static struct qeth_qdio_out_q *qeth_alloc_output_queue(void)
2635 {
2636         struct qeth_qdio_out_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
2637
2638         if (!q)
2639                 return NULL;
2640
2641         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
2642                 kfree(q);
2643                 return NULL;
2644         }
2645         return q;
2646 }
2647
2648 static void qeth_tx_completion_timer(struct timer_list *timer)
2649 {
2650         struct qeth_qdio_out_q *queue = from_timer(queue, timer, timer);
2651
2652         napi_schedule(&queue->napi);
2653         QETH_TXQ_STAT_INC(queue, completion_timer);
2654 }
2655
2656 static int qeth_alloc_qdio_queues(struct qeth_card *card)
2657 {
2658         int i, j;
2659
2660         QETH_CARD_TEXT(card, 2, "allcqdbf");
2661
2662         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED,
2663                 QETH_QDIO_ALLOCATED) != QETH_QDIO_UNINITIALIZED)
2664                 return 0;
2665
2666         QETH_CARD_TEXT(card, 2, "inq");
2667         card->qdio.in_q = qeth_alloc_qdio_queue();
2668         if (!card->qdio.in_q)
2669                 goto out_nomem;
2670
2671         /* inbound buffer pool */
2672         if (qeth_alloc_buffer_pool(card))
2673                 goto out_freeinq;
2674
2675         /* outbound */
2676         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2677                 struct qeth_qdio_out_q *queue;
2678
2679                 queue = qeth_alloc_output_queue();
2680                 if (!queue)
2681                         goto out_freeoutq;
2682                 QETH_CARD_TEXT_(card, 2, "outq %i", i);
2683                 QETH_CARD_HEX(card, 2, &queue, sizeof(void *));
2684                 card->qdio.out_qs[i] = queue;
2685                 queue->card = card;
2686                 queue->queue_no = i;
2687                 spin_lock_init(&queue->lock);
2688                 timer_setup(&queue->timer, qeth_tx_completion_timer, 0);
2689                 queue->coalesce_usecs = QETH_TX_COALESCE_USECS;
2690                 queue->max_coalesced_frames = QETH_TX_MAX_COALESCED_FRAMES;
2691                 queue->priority = QETH_QIB_PQUE_PRIO_DEFAULT;
2692
2693                 /* give outbound qeth_qdio_buffers their qdio_buffers */
2694                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2695                         WARN_ON(queue->bufs[j]);
2696                         if (qeth_init_qdio_out_buf(queue, j))
2697                                 goto out_freeoutqbufs;
2698                 }
2699         }
2700
2701         /* completion */
2702         if (qeth_alloc_cq(card))
2703                 goto out_freeoutq;
2704
2705         return 0;
2706
2707 out_freeoutqbufs:
2708         while (j > 0) {
2709                 --j;
2710                 kmem_cache_free(qeth_qdio_outbuf_cache,
2711                                 card->qdio.out_qs[i]->bufs[j]);
2712                 card->qdio.out_qs[i]->bufs[j] = NULL;
2713         }
2714 out_freeoutq:
2715         while (i > 0) {
2716                 qeth_free_output_queue(card->qdio.out_qs[--i]);
2717                 card->qdio.out_qs[i] = NULL;
2718         }
2719         qeth_free_buffer_pool(card);
2720 out_freeinq:
2721         qeth_free_qdio_queue(card->qdio.in_q);
2722         card->qdio.in_q = NULL;
2723 out_nomem:
2724         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
2725         return -ENOMEM;
2726 }
2727
2728 static void qeth_free_qdio_queues(struct qeth_card *card)
2729 {
2730         int i, j;
2731
2732         if (atomic_xchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED) ==
2733                 QETH_QDIO_UNINITIALIZED)
2734                 return;
2735
2736         qeth_free_cq(card);
2737         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2738                 if (card->qdio.in_q->bufs[j].rx_skb)
2739                         dev_kfree_skb_any(card->qdio.in_q->bufs[j].rx_skb);
2740         }
2741         qeth_free_qdio_queue(card->qdio.in_q);
2742         card->qdio.in_q = NULL;
2743         /* inbound buffer pool */
2744         qeth_free_buffer_pool(card);
2745         /* free outbound qdio_qs */
2746         for (i = 0; i < card->qdio.no_out_queues; i++) {
2747                 qeth_free_output_queue(card->qdio.out_qs[i]);
2748                 card->qdio.out_qs[i] = NULL;
2749         }
2750 }
2751
2752 static void qeth_fill_qib_parms(struct qeth_card *card,
2753                                 struct qeth_qib_parms *parms)
2754 {
2755         struct qeth_qdio_out_q *queue;
2756         unsigned int i;
2757
2758         parms->pcit_magic[0] = 'P';
2759         parms->pcit_magic[1] = 'C';
2760         parms->pcit_magic[2] = 'I';
2761         parms->pcit_magic[3] = 'T';
2762         ASCEBC(parms->pcit_magic, sizeof(parms->pcit_magic));
2763         parms->pcit_a = QETH_PCI_THRESHOLD_A(card);
2764         parms->pcit_b = QETH_PCI_THRESHOLD_B(card);
2765         parms->pcit_c = QETH_PCI_TIMER_VALUE(card);
2766
2767         parms->blkt_magic[0] = 'B';
2768         parms->blkt_magic[1] = 'L';
2769         parms->blkt_magic[2] = 'K';
2770         parms->blkt_magic[3] = 'T';
2771         ASCEBC(parms->blkt_magic, sizeof(parms->blkt_magic));
2772         parms->blkt_total = card->info.blkt.time_total;
2773         parms->blkt_inter_packet = card->info.blkt.inter_packet;
2774         parms->blkt_inter_packet_jumbo = card->info.blkt.inter_packet_jumbo;
2775
2776         /* Prio-queueing implicitly uses the default priorities: */
2777         if (qeth_uses_tx_prio_queueing(card) || card->qdio.no_out_queues == 1)
2778                 return;
2779
2780         parms->pque_magic[0] = 'P';
2781         parms->pque_magic[1] = 'Q';
2782         parms->pque_magic[2] = 'U';
2783         parms->pque_magic[3] = 'E';
2784         ASCEBC(parms->pque_magic, sizeof(parms->pque_magic));
2785         parms->pque_order = QETH_QIB_PQUE_ORDER_RR;
2786         parms->pque_units = QETH_QIB_PQUE_UNITS_SBAL;
2787
2788         qeth_for_each_output_queue(card, queue, i)
2789                 parms->pque_priority[i] = queue->priority;
2790 }
2791
2792 static int qeth_qdio_activate(struct qeth_card *card)
2793 {
2794         QETH_CARD_TEXT(card, 3, "qdioact");
2795         return qdio_activate(CARD_DDEV(card));
2796 }
2797
2798 static int qeth_dm_act(struct qeth_card *card)
2799 {
2800         struct qeth_cmd_buffer *iob;
2801
2802         QETH_CARD_TEXT(card, 2, "dmact");
2803
2804         iob = qeth_mpc_alloc_cmd(card, DM_ACT, DM_ACT_SIZE);
2805         if (!iob)
2806                 return -ENOMEM;
2807
2808         memcpy(QETH_DM_ACT_DEST_ADDR(iob->data),
2809                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2810         memcpy(QETH_DM_ACT_CONNECTION_TOKEN(iob->data),
2811                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2812         return qeth_send_control_data(card, iob, NULL, NULL);
2813 }
2814
2815 static int qeth_mpc_initialize(struct qeth_card *card)
2816 {
2817         int rc;
2818
2819         QETH_CARD_TEXT(card, 2, "mpcinit");
2820
2821         rc = qeth_issue_next_read(card);
2822         if (rc) {
2823                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
2824                 return rc;
2825         }
2826         rc = qeth_cm_enable(card);
2827         if (rc) {
2828                 QETH_CARD_TEXT_(card, 2, "2err%d", rc);
2829                 return rc;
2830         }
2831         rc = qeth_cm_setup(card);
2832         if (rc) {
2833                 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
2834                 return rc;
2835         }
2836         rc = qeth_ulp_enable(card);
2837         if (rc) {
2838                 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
2839                 return rc;
2840         }
2841         rc = qeth_ulp_setup(card);
2842         if (rc) {
2843                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2844                 return rc;
2845         }
2846         rc = qeth_alloc_qdio_queues(card);
2847         if (rc) {
2848                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2849                 return rc;
2850         }
2851         rc = qeth_qdio_establish(card);
2852         if (rc) {
2853                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
2854                 qeth_free_qdio_queues(card);
2855                 return rc;
2856         }
2857         rc = qeth_qdio_activate(card);
2858         if (rc) {
2859                 QETH_CARD_TEXT_(card, 2, "7err%d", rc);
2860                 return rc;
2861         }
2862         rc = qeth_dm_act(card);
2863         if (rc) {
2864                 QETH_CARD_TEXT_(card, 2, "8err%d", rc);
2865                 return rc;
2866         }
2867
2868         return 0;
2869 }
2870
2871 static void qeth_print_status_message(struct qeth_card *card)
2872 {
2873         switch (card->info.type) {
2874         case QETH_CARD_TYPE_OSD:
2875         case QETH_CARD_TYPE_OSM:
2876         case QETH_CARD_TYPE_OSX:
2877                 /* VM will use a non-zero first character
2878                  * to indicate a HiperSockets like reporting
2879                  * of the level OSA sets the first character to zero
2880                  * */
2881                 if (!card->info.mcl_level[0]) {
2882                         sprintf(card->info.mcl_level, "%02x%02x",
2883                                 card->info.mcl_level[2],
2884                                 card->info.mcl_level[3]);
2885                         break;
2886                 }
2887                 fallthrough;
2888         case QETH_CARD_TYPE_IQD:
2889                 if (IS_VM_NIC(card) || (card->info.mcl_level[0] & 0x80)) {
2890                         card->info.mcl_level[0] = (char) _ebcasc[(__u8)
2891                                 card->info.mcl_level[0]];
2892                         card->info.mcl_level[1] = (char) _ebcasc[(__u8)
2893                                 card->info.mcl_level[1]];
2894                         card->info.mcl_level[2] = (char) _ebcasc[(__u8)
2895                                 card->info.mcl_level[2]];
2896                         card->info.mcl_level[3] = (char) _ebcasc[(__u8)
2897                                 card->info.mcl_level[3]];
2898                         card->info.mcl_level[QETH_MCL_LENGTH] = 0;
2899                 }
2900                 break;
2901         default:
2902                 memset(&card->info.mcl_level[0], 0, QETH_MCL_LENGTH + 1);
2903         }
2904         dev_info(&card->gdev->dev,
2905                  "Device is a%s card%s%s%s\nwith link type %s.\n",
2906                  qeth_get_cardname(card),
2907                  (card->info.mcl_level[0]) ? " (level: " : "",
2908                  (card->info.mcl_level[0]) ? card->info.mcl_level : "",
2909                  (card->info.mcl_level[0]) ? ")" : "",
2910                  qeth_get_cardname_short(card));
2911 }
2912
2913 static void qeth_initialize_working_pool_list(struct qeth_card *card)
2914 {
2915         struct qeth_buffer_pool_entry *entry;
2916
2917         QETH_CARD_TEXT(card, 5, "inwrklst");
2918
2919         list_for_each_entry(entry,
2920                             &card->qdio.init_pool.entry_list, init_list) {
2921                 qeth_put_buffer_pool_entry(card, entry);
2922         }
2923 }
2924
2925 static struct qeth_buffer_pool_entry *qeth_find_free_buffer_pool_entry(
2926                                         struct qeth_card *card)
2927 {
2928         struct qeth_buffer_pool_entry *entry;
2929         int i, free;
2930
2931         if (list_empty(&card->qdio.in_buf_pool.entry_list))
2932                 return NULL;
2933
2934         list_for_each_entry(entry, &card->qdio.in_buf_pool.entry_list, list) {
2935                 free = 1;
2936                 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2937                         if (page_count(entry->elements[i]) > 1) {
2938                                 free = 0;
2939                                 break;
2940                         }
2941                 }
2942                 if (free) {
2943                         list_del_init(&entry->list);
2944                         return entry;
2945                 }
2946         }
2947
2948         /* no free buffer in pool so take first one and swap pages */
2949         entry = list_first_entry(&card->qdio.in_buf_pool.entry_list,
2950                                  struct qeth_buffer_pool_entry, list);
2951         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2952                 if (page_count(entry->elements[i]) > 1) {
2953                         struct page *page = dev_alloc_page();
2954
2955                         if (!page)
2956                                 return NULL;
2957
2958                         __free_page(entry->elements[i]);
2959                         entry->elements[i] = page;
2960                         QETH_CARD_STAT_INC(card, rx_sg_alloc_page);
2961                 }
2962         }
2963         list_del_init(&entry->list);
2964         return entry;
2965 }
2966
2967 static int qeth_init_input_buffer(struct qeth_card *card,
2968                 struct qeth_qdio_buffer *buf)
2969 {
2970         struct qeth_buffer_pool_entry *pool_entry = buf->pool_entry;
2971         int i;
2972
2973         if ((card->options.cq == QETH_CQ_ENABLED) && (!buf->rx_skb)) {
2974                 buf->rx_skb = netdev_alloc_skb(card->dev,
2975                                                ETH_HLEN +
2976                                                sizeof(struct ipv6hdr));
2977                 if (!buf->rx_skb)
2978                         return -ENOMEM;
2979         }
2980
2981         if (!pool_entry) {
2982                 pool_entry = qeth_find_free_buffer_pool_entry(card);
2983                 if (!pool_entry)
2984                         return -ENOBUFS;
2985
2986                 buf->pool_entry = pool_entry;
2987         }
2988
2989         /*
2990          * since the buffer is accessed only from the input_tasklet
2991          * there shouldn't be a need to synchronize; also, since we use
2992          * the QETH_IN_BUF_REQUEUE_THRESHOLD we should never run  out off
2993          * buffers
2994          */
2995         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2996                 buf->buffer->element[i].length = PAGE_SIZE;
2997                 buf->buffer->element[i].addr =
2998                         page_to_phys(pool_entry->elements[i]);
2999                 if (i == QETH_MAX_BUFFER_ELEMENTS(card) - 1)
3000                         buf->buffer->element[i].eflags = SBAL_EFLAGS_LAST_ENTRY;
3001                 else
3002                         buf->buffer->element[i].eflags = 0;
3003                 buf->buffer->element[i].sflags = 0;
3004         }
3005         return 0;
3006 }
3007
3008 static unsigned int qeth_tx_select_bulk_max(struct qeth_card *card,
3009                                             struct qeth_qdio_out_q *queue)
3010 {
3011         if (!IS_IQD(card) ||
3012             qeth_iqd_is_mcast_queue(card, queue) ||
3013             card->options.cq == QETH_CQ_ENABLED ||
3014             qdio_get_ssqd_desc(CARD_DDEV(card), &card->ssqd))
3015                 return 1;
3016
3017         return card->ssqd.mmwc ? card->ssqd.mmwc : 1;
3018 }
3019
3020 static int qeth_init_qdio_queues(struct qeth_card *card)
3021 {
3022         unsigned int rx_bufs = card->qdio.in_buf_pool.buf_count;
3023         unsigned int i;
3024         int rc;
3025
3026         QETH_CARD_TEXT(card, 2, "initqdqs");
3027
3028         /* inbound queue */
3029         qdio_reset_buffers(card->qdio.in_q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
3030         memset(&card->rx, 0, sizeof(struct qeth_rx));
3031
3032         qeth_initialize_working_pool_list(card);
3033         /*give only as many buffers to hardware as we have buffer pool entries*/
3034         for (i = 0; i < rx_bufs; i++) {
3035                 rc = qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]);
3036                 if (rc)
3037                         return rc;
3038         }
3039
3040         card->qdio.in_q->next_buf_to_init = QDIO_BUFNR(rx_bufs);
3041         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0, 0, rx_bufs);
3042         if (rc) {
3043                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
3044                 return rc;
3045         }
3046
3047         /* completion */
3048         rc = qeth_cq_init(card);
3049         if (rc) {
3050                 return rc;
3051         }
3052
3053         /* outbound queue */
3054         for (i = 0; i < card->qdio.no_out_queues; ++i) {
3055                 struct qeth_qdio_out_q *queue = card->qdio.out_qs[i];
3056
3057                 qdio_reset_buffers(queue->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
3058                 queue->max_elements = QETH_MAX_BUFFER_ELEMENTS(card);
3059                 queue->next_buf_to_fill = 0;
3060                 queue->do_pack = 0;
3061                 queue->prev_hdr = NULL;
3062                 queue->coalesced_frames = 0;
3063                 queue->bulk_start = 0;
3064                 queue->bulk_count = 0;
3065                 queue->bulk_max = qeth_tx_select_bulk_max(card, queue);
3066                 atomic_set(&queue->used_buffers, 0);
3067                 atomic_set(&queue->set_pci_flags_count, 0);
3068                 netdev_tx_reset_queue(netdev_get_tx_queue(card->dev, i));
3069         }
3070         return 0;
3071 }
3072
3073 static void qeth_ipa_finalize_cmd(struct qeth_card *card,
3074                                   struct qeth_cmd_buffer *iob)
3075 {
3076         qeth_mpc_finalize_cmd(card, iob);
3077
3078         /* override with IPA-specific values: */
3079         __ipa_cmd(iob)->hdr.seqno = card->seqno.ipa++;
3080 }
3081
3082 void qeth_prepare_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
3083                           u16 cmd_length,
3084                           bool (*match)(struct qeth_cmd_buffer *iob,
3085                                         struct qeth_cmd_buffer *reply))
3086 {
3087         u8 prot_type = qeth_mpc_select_prot_type(card);
3088         u16 total_length = iob->length;
3089
3090         qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, total_length,
3091                        iob->data);
3092         iob->finalize = qeth_ipa_finalize_cmd;
3093         iob->match = match;
3094
3095         memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
3096         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &total_length, 2);
3097         memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1);
3098         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &cmd_length, 2);
3099         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &cmd_length, 2);
3100         memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
3101                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
3102         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &cmd_length, 2);
3103 }
3104 EXPORT_SYMBOL_GPL(qeth_prepare_ipa_cmd);
3105
3106 static bool qeth_ipa_match_reply(struct qeth_cmd_buffer *iob,
3107                                  struct qeth_cmd_buffer *reply)
3108 {
3109         struct qeth_ipa_cmd *ipa_reply = __ipa_reply(reply);
3110
3111         return ipa_reply && (__ipa_cmd(iob)->hdr.seqno == ipa_reply->hdr.seqno);
3112 }
3113
3114 struct qeth_cmd_buffer *qeth_ipa_alloc_cmd(struct qeth_card *card,
3115                                            enum qeth_ipa_cmds cmd_code,
3116                                            enum qeth_prot_versions prot,
3117                                            unsigned int data_length)
3118 {
3119         struct qeth_cmd_buffer *iob;
3120         struct qeth_ipacmd_hdr *hdr;
3121
3122         data_length += offsetof(struct qeth_ipa_cmd, data);
3123         iob = qeth_alloc_cmd(&card->write, IPA_PDU_HEADER_SIZE + data_length, 1,
3124                              QETH_IPA_TIMEOUT);
3125         if (!iob)
3126                 return NULL;
3127
3128         qeth_prepare_ipa_cmd(card, iob, data_length, qeth_ipa_match_reply);
3129
3130         hdr = &__ipa_cmd(iob)->hdr;
3131         hdr->command = cmd_code;
3132         hdr->initiator = IPA_CMD_INITIATOR_HOST;
3133         /* hdr->seqno is set by qeth_send_control_data() */
3134         hdr->adapter_type = QETH_LINK_TYPE_FAST_ETH;
3135         hdr->rel_adapter_no = (u8) card->dev->dev_port;
3136         hdr->prim_version_no = IS_LAYER2(card) ? 2 : 1;
3137         hdr->param_count = 1;
3138         hdr->prot_version = prot;
3139         return iob;
3140 }
3141 EXPORT_SYMBOL_GPL(qeth_ipa_alloc_cmd);
3142
3143 static int qeth_send_ipa_cmd_cb(struct qeth_card *card,
3144                                 struct qeth_reply *reply, unsigned long data)
3145 {
3146         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3147
3148         return (cmd->hdr.return_code) ? -EIO : 0;
3149 }
3150
3151 /**
3152  * qeth_send_ipa_cmd() - send an IPA command
3153  *
3154  * See qeth_send_control_data() for explanation of the arguments.
3155  */
3156
3157 int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
3158                 int (*reply_cb)(struct qeth_card *, struct qeth_reply*,
3159                         unsigned long),
3160                 void *reply_param)
3161 {
3162         int rc;
3163
3164         QETH_CARD_TEXT(card, 4, "sendipa");
3165
3166         if (card->read_or_write_problem) {
3167                 qeth_put_cmd(iob);
3168                 return -EIO;
3169         }
3170
3171         if (reply_cb == NULL)
3172                 reply_cb = qeth_send_ipa_cmd_cb;
3173         rc = qeth_send_control_data(card, iob, reply_cb, reply_param);
3174         if (rc == -ETIME) {
3175                 qeth_clear_ipacmd_list(card);
3176                 qeth_schedule_recovery(card);
3177         }
3178         return rc;
3179 }
3180 EXPORT_SYMBOL_GPL(qeth_send_ipa_cmd);
3181
3182 static int qeth_send_startlan_cb(struct qeth_card *card,
3183                                  struct qeth_reply *reply, unsigned long data)
3184 {
3185         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3186
3187         if (cmd->hdr.return_code == IPA_RC_LAN_OFFLINE)
3188                 return -ENETDOWN;
3189
3190         return (cmd->hdr.return_code) ? -EIO : 0;
3191 }
3192
3193 static int qeth_send_startlan(struct qeth_card *card)
3194 {
3195         struct qeth_cmd_buffer *iob;
3196
3197         QETH_CARD_TEXT(card, 2, "strtlan");
3198
3199         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_STARTLAN, QETH_PROT_NONE, 0);
3200         if (!iob)
3201                 return -ENOMEM;
3202         return qeth_send_ipa_cmd(card, iob, qeth_send_startlan_cb, NULL);
3203 }
3204
3205 static int qeth_setadpparms_inspect_rc(struct qeth_ipa_cmd *cmd)
3206 {
3207         if (!cmd->hdr.return_code)
3208                 cmd->hdr.return_code =
3209                         cmd->data.setadapterparms.hdr.return_code;
3210         return cmd->hdr.return_code;
3211 }
3212
3213 static int qeth_query_setadapterparms_cb(struct qeth_card *card,
3214                 struct qeth_reply *reply, unsigned long data)
3215 {
3216         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3217         struct qeth_query_cmds_supp *query_cmd;
3218
3219         QETH_CARD_TEXT(card, 3, "quyadpcb");
3220         if (qeth_setadpparms_inspect_rc(cmd))
3221                 return -EIO;
3222
3223         query_cmd = &cmd->data.setadapterparms.data.query_cmds_supp;
3224         if (query_cmd->lan_type & 0x7f) {
3225                 if (!qeth_is_supported_link_type(card, query_cmd->lan_type))
3226                         return -EPROTONOSUPPORT;
3227
3228                 card->info.link_type = query_cmd->lan_type;
3229                 QETH_CARD_TEXT_(card, 2, "lnk %d", card->info.link_type);
3230         }
3231
3232         card->options.adp.supported = query_cmd->supported_cmds;
3233         return 0;
3234 }
3235
3236 static struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card,
3237                                                     enum qeth_ipa_setadp_cmd adp_cmd,
3238                                                     unsigned int data_length)
3239 {
3240         struct qeth_ipacmd_setadpparms_hdr *hdr;
3241         struct qeth_cmd_buffer *iob;
3242
3243         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETADAPTERPARMS, QETH_PROT_IPV4,
3244                                  data_length +
3245                                  offsetof(struct qeth_ipacmd_setadpparms,
3246                                           data));
3247         if (!iob)
3248                 return NULL;
3249
3250         hdr = &__ipa_cmd(iob)->data.setadapterparms.hdr;
3251         hdr->cmdlength = sizeof(*hdr) + data_length;
3252         hdr->command_code = adp_cmd;
3253         hdr->used_total = 1;
3254         hdr->seq_no = 1;
3255         return iob;
3256 }
3257
3258 static int qeth_query_setadapterparms(struct qeth_card *card)
3259 {
3260         int rc;
3261         struct qeth_cmd_buffer *iob;
3262
3263         QETH_CARD_TEXT(card, 3, "queryadp");
3264         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_COMMANDS_SUPPORTED,
3265                                    SETADP_DATA_SIZEOF(query_cmds_supp));
3266         if (!iob)
3267                 return -ENOMEM;
3268         rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL);
3269         return rc;
3270 }
3271
3272 static int qeth_query_ipassists_cb(struct qeth_card *card,
3273                 struct qeth_reply *reply, unsigned long data)
3274 {
3275         struct qeth_ipa_cmd *cmd;
3276
3277         QETH_CARD_TEXT(card, 2, "qipasscb");
3278
3279         cmd = (struct qeth_ipa_cmd *) data;
3280
3281         switch (cmd->hdr.return_code) {
3282         case IPA_RC_SUCCESS:
3283                 break;
3284         case IPA_RC_NOTSUPP:
3285         case IPA_RC_L2_UNSUPPORTED_CMD:
3286                 QETH_CARD_TEXT(card, 2, "ipaunsup");
3287                 card->options.ipa4.supported |= IPA_SETADAPTERPARMS;
3288                 card->options.ipa6.supported |= IPA_SETADAPTERPARMS;
3289                 return -EOPNOTSUPP;
3290         default:
3291                 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Unhandled rc=%#x\n",
3292                                  CARD_DEVID(card), cmd->hdr.return_code);
3293                 return -EIO;
3294         }
3295
3296         if (cmd->hdr.prot_version == QETH_PROT_IPV4)
3297                 card->options.ipa4 = cmd->hdr.assists;
3298         else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
3299                 card->options.ipa6 = cmd->hdr.assists;
3300         else
3301                 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Flawed LIC detected\n",
3302                                  CARD_DEVID(card));
3303         return 0;
3304 }
3305
3306 static int qeth_query_ipassists(struct qeth_card *card,
3307                                 enum qeth_prot_versions prot)
3308 {
3309         int rc;
3310         struct qeth_cmd_buffer *iob;
3311
3312         QETH_CARD_TEXT_(card, 2, "qipassi%i", prot);
3313         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_QIPASSIST, prot, 0);
3314         if (!iob)
3315                 return -ENOMEM;
3316         rc = qeth_send_ipa_cmd(card, iob, qeth_query_ipassists_cb, NULL);
3317         return rc;
3318 }
3319
3320 static int qeth_query_switch_attributes_cb(struct qeth_card *card,
3321                                 struct qeth_reply *reply, unsigned long data)
3322 {
3323         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3324         struct qeth_query_switch_attributes *attrs;
3325         struct qeth_switch_info *sw_info;
3326
3327         QETH_CARD_TEXT(card, 2, "qswiatcb");
3328         if (qeth_setadpparms_inspect_rc(cmd))
3329                 return -EIO;
3330
3331         sw_info = (struct qeth_switch_info *)reply->param;
3332         attrs = &cmd->data.setadapterparms.data.query_switch_attributes;
3333         sw_info->capabilities = attrs->capabilities;
3334         sw_info->settings = attrs->settings;
3335         QETH_CARD_TEXT_(card, 2, "%04x%04x", sw_info->capabilities,
3336                         sw_info->settings);
3337         return 0;
3338 }
3339
3340 int qeth_query_switch_attributes(struct qeth_card *card,
3341                                  struct qeth_switch_info *sw_info)
3342 {
3343         struct qeth_cmd_buffer *iob;
3344
3345         QETH_CARD_TEXT(card, 2, "qswiattr");
3346         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES))
3347                 return -EOPNOTSUPP;
3348         if (!netif_carrier_ok(card->dev))
3349                 return -ENOMEDIUM;
3350         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES, 0);
3351         if (!iob)
3352                 return -ENOMEM;
3353         return qeth_send_ipa_cmd(card, iob,
3354                                 qeth_query_switch_attributes_cb, sw_info);
3355 }
3356
3357 struct qeth_cmd_buffer *qeth_get_diag_cmd(struct qeth_card *card,
3358                                           enum qeth_diags_cmds sub_cmd,
3359                                           unsigned int data_length)
3360 {
3361         struct qeth_ipacmd_diagass *cmd;
3362         struct qeth_cmd_buffer *iob;
3363
3364         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SET_DIAG_ASS, QETH_PROT_NONE,
3365                                  DIAG_HDR_LEN + data_length);
3366         if (!iob)
3367                 return NULL;
3368
3369         cmd = &__ipa_cmd(iob)->data.diagass;
3370         cmd->subcmd_len = DIAG_SUB_HDR_LEN + data_length;
3371         cmd->subcmd = sub_cmd;
3372         return iob;
3373 }
3374 EXPORT_SYMBOL_GPL(qeth_get_diag_cmd);
3375
3376 static int qeth_query_setdiagass_cb(struct qeth_card *card,
3377                 struct qeth_reply *reply, unsigned long data)
3378 {
3379         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3380         u16 rc = cmd->hdr.return_code;
3381
3382         if (rc) {
3383                 QETH_CARD_TEXT_(card, 2, "diagq:%x", rc);
3384                 return -EIO;
3385         }
3386
3387         card->info.diagass_support = cmd->data.diagass.ext;
3388         return 0;
3389 }
3390
3391 static int qeth_query_setdiagass(struct qeth_card *card)
3392 {
3393         struct qeth_cmd_buffer *iob;
3394
3395         QETH_CARD_TEXT(card, 2, "qdiagass");
3396         iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_QUERY, 0);
3397         if (!iob)
3398                 return -ENOMEM;
3399         return qeth_send_ipa_cmd(card, iob, qeth_query_setdiagass_cb, NULL);
3400 }
3401
3402 static void qeth_get_trap_id(struct qeth_card *card, struct qeth_trap_id *tid)
3403 {
3404         unsigned long info = get_zeroed_page(GFP_KERNEL);
3405         struct sysinfo_2_2_2 *info222 = (struct sysinfo_2_2_2 *)info;
3406         struct sysinfo_3_2_2 *info322 = (struct sysinfo_3_2_2 *)info;
3407         struct ccw_dev_id ccwid;
3408         int level;
3409
3410         tid->chpid = card->info.chpid;
3411         ccw_device_get_id(CARD_RDEV(card), &ccwid);
3412         tid->ssid = ccwid.ssid;
3413         tid->devno = ccwid.devno;
3414         if (!info)
3415                 return;
3416         level = stsi(NULL, 0, 0, 0);
3417         if ((level >= 2) && (stsi(info222, 2, 2, 2) == 0))
3418                 tid->lparnr = info222->lpar_number;
3419         if ((level >= 3) && (stsi(info322, 3, 2, 2) == 0)) {
3420                 EBCASC(info322->vm[0].name, sizeof(info322->vm[0].name));
3421                 memcpy(tid->vmname, info322->vm[0].name, sizeof(tid->vmname));
3422         }
3423         free_page(info);
3424 }
3425
3426 static int qeth_hw_trap_cb(struct qeth_card *card,
3427                 struct qeth_reply *reply, unsigned long data)
3428 {
3429         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3430         u16 rc = cmd->hdr.return_code;
3431
3432         if (rc) {
3433                 QETH_CARD_TEXT_(card, 2, "trapc:%x", rc);
3434                 return -EIO;
3435         }
3436         return 0;
3437 }
3438
3439 int qeth_hw_trap(struct qeth_card *card, enum qeth_diags_trap_action action)
3440 {
3441         struct qeth_cmd_buffer *iob;
3442         struct qeth_ipa_cmd *cmd;
3443
3444         QETH_CARD_TEXT(card, 2, "diagtrap");
3445         iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_TRAP, 64);
3446         if (!iob)
3447                 return -ENOMEM;
3448         cmd = __ipa_cmd(iob);
3449         cmd->data.diagass.type = 1;
3450         cmd->data.diagass.action = action;
3451         switch (action) {
3452         case QETH_DIAGS_TRAP_ARM:
3453                 cmd->data.diagass.options = 0x0003;
3454                 cmd->data.diagass.ext = 0x00010000 +
3455                         sizeof(struct qeth_trap_id);
3456                 qeth_get_trap_id(card,
3457                         (struct qeth_trap_id *)cmd->data.diagass.cdata);
3458                 break;
3459         case QETH_DIAGS_TRAP_DISARM:
3460                 cmd->data.diagass.options = 0x0001;
3461                 break;
3462         case QETH_DIAGS_TRAP_CAPTURE:
3463                 break;
3464         }
3465         return qeth_send_ipa_cmd(card, iob, qeth_hw_trap_cb, NULL);
3466 }
3467
3468 static int qeth_check_qdio_errors(struct qeth_card *card,
3469                                   struct qdio_buffer *buf,
3470                                   unsigned int qdio_error,
3471                                   const char *dbftext)
3472 {
3473         if (qdio_error) {
3474                 QETH_CARD_TEXT(card, 2, dbftext);
3475                 QETH_CARD_TEXT_(card, 2, " F15=%02X",
3476                                buf->element[15].sflags);
3477                 QETH_CARD_TEXT_(card, 2, " F14=%02X",
3478                                buf->element[14].sflags);
3479                 QETH_CARD_TEXT_(card, 2, " qerr=%X", qdio_error);
3480                 if ((buf->element[15].sflags) == 0x12) {
3481                         QETH_CARD_STAT_INC(card, rx_fifo_errors);
3482                         return 0;
3483                 } else
3484                         return 1;
3485         }
3486         return 0;
3487 }
3488
3489 static unsigned int qeth_rx_refill_queue(struct qeth_card *card,
3490                                          unsigned int count)
3491 {
3492         struct qeth_qdio_q *queue = card->qdio.in_q;
3493         struct list_head *lh;
3494         int i;
3495         int rc;
3496         int newcount = 0;
3497
3498         /* only requeue at a certain threshold to avoid SIGAs */
3499         if (count >= QETH_IN_BUF_REQUEUE_THRESHOLD(card)) {
3500                 for (i = queue->next_buf_to_init;
3501                      i < queue->next_buf_to_init + count; ++i) {
3502                         if (qeth_init_input_buffer(card,
3503                                 &queue->bufs[QDIO_BUFNR(i)])) {
3504                                 break;
3505                         } else {
3506                                 newcount++;
3507                         }
3508                 }
3509
3510                 if (newcount < count) {
3511                         /* we are in memory shortage so we switch back to
3512                            traditional skb allocation and drop packages */
3513                         atomic_set(&card->force_alloc_skb, 3);
3514                         count = newcount;
3515                 } else {
3516                         atomic_add_unless(&card->force_alloc_skb, -1, 0);
3517                 }
3518
3519                 if (!count) {
3520                         i = 0;
3521                         list_for_each(lh, &card->qdio.in_buf_pool.entry_list)
3522                                 i++;
3523                         if (i == card->qdio.in_buf_pool.buf_count) {
3524                                 QETH_CARD_TEXT(card, 2, "qsarbw");
3525                                 schedule_delayed_work(
3526                                         &card->buffer_reclaim_work,
3527                                         QETH_RECLAIM_WORK_TIME);
3528                         }
3529                         return 0;
3530                 }
3531
3532                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0,
3533                              queue->next_buf_to_init, count);
3534                 if (rc) {
3535                         QETH_CARD_TEXT(card, 2, "qinberr");
3536                 }
3537                 queue->next_buf_to_init = QDIO_BUFNR(queue->next_buf_to_init +
3538                                                      count);
3539                 return count;
3540         }
3541
3542         return 0;
3543 }
3544
3545 static void qeth_buffer_reclaim_work(struct work_struct *work)
3546 {
3547         struct qeth_card *card = container_of(to_delayed_work(work),
3548                                               struct qeth_card,
3549                                               buffer_reclaim_work);
3550
3551         local_bh_disable();
3552         napi_schedule(&card->napi);
3553         /* kick-start the NAPI softirq: */
3554         local_bh_enable();
3555 }
3556
3557 static void qeth_handle_send_error(struct qeth_card *card,
3558                 struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err)
3559 {
3560         int sbalf15 = buffer->buffer->element[15].sflags;
3561
3562         QETH_CARD_TEXT(card, 6, "hdsnderr");
3563         qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr");
3564
3565         if (!qdio_err)
3566                 return;
3567
3568         if ((sbalf15 >= 15) && (sbalf15 <= 31))
3569                 return;
3570
3571         QETH_CARD_TEXT(card, 1, "lnkfail");
3572         QETH_CARD_TEXT_(card, 1, "%04x %02x",
3573                        (u16)qdio_err, (u8)sbalf15);
3574 }
3575
3576 /**
3577  * qeth_prep_flush_pack_buffer - Prepares flushing of a packing buffer.
3578  * @queue: queue to check for packing buffer
3579  *
3580  * Returns number of buffers that were prepared for flush.
3581  */
3582 static int qeth_prep_flush_pack_buffer(struct qeth_qdio_out_q *queue)
3583 {
3584         struct qeth_qdio_out_buffer *buffer;
3585
3586         buffer = queue->bufs[queue->next_buf_to_fill];
3587         if ((atomic_read(&buffer->state) == QETH_QDIO_BUF_EMPTY) &&
3588             (buffer->next_element_to_fill > 0)) {
3589                 /* it's a packing buffer */
3590                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3591                 queue->next_buf_to_fill =
3592                         QDIO_BUFNR(queue->next_buf_to_fill + 1);
3593                 return 1;
3594         }
3595         return 0;
3596 }
3597
3598 /*
3599  * Switched to packing state if the number of used buffers on a queue
3600  * reaches a certain limit.
3601  */
3602 static void qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q *queue)
3603 {
3604         if (!queue->do_pack) {
3605                 if (atomic_read(&queue->used_buffers)
3606                     >= QETH_HIGH_WATERMARK_PACK){
3607                         /* switch non-PACKING -> PACKING */
3608                         QETH_CARD_TEXT(queue->card, 6, "np->pack");
3609                         QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3610                         queue->do_pack = 1;
3611                 }
3612         }
3613 }
3614
3615 /*
3616  * Switches from packing to non-packing mode. If there is a packing
3617  * buffer on the queue this buffer will be prepared to be flushed.
3618  * In that case 1 is returned to inform the caller. If no buffer
3619  * has to be flushed, zero is returned.
3620  */
3621 static int qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q *queue)
3622 {
3623         if (queue->do_pack) {
3624                 if (atomic_read(&queue->used_buffers)
3625                     <= QETH_LOW_WATERMARK_PACK) {
3626                         /* switch PACKING -> non-PACKING */
3627                         QETH_CARD_TEXT(queue->card, 6, "pack->np");
3628                         QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3629                         queue->do_pack = 0;
3630                         return qeth_prep_flush_pack_buffer(queue);
3631                 }
3632         }
3633         return 0;
3634 }
3635
3636 static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
3637                                int count)
3638 {
3639         struct qeth_qdio_out_buffer *buf = queue->bufs[index];
3640         unsigned int qdio_flags = QDIO_FLAG_SYNC_OUTPUT;
3641         struct qeth_card *card = queue->card;
3642         int rc;
3643         int i;
3644
3645         for (i = index; i < index + count; ++i) {
3646                 unsigned int bidx = QDIO_BUFNR(i);
3647                 struct sk_buff *skb;
3648
3649                 buf = queue->bufs[bidx];
3650                 buf->buffer->element[buf->next_element_to_fill - 1].eflags |=
3651                                 SBAL_EFLAGS_LAST_ENTRY;
3652                 queue->coalesced_frames += buf->frames;
3653
3654                 if (queue->bufstates)
3655                         queue->bufstates[bidx].user = buf;
3656
3657                 if (IS_IQD(card)) {
3658                         skb_queue_walk(&buf->skb_list, skb)
3659                                 skb_tx_timestamp(skb);
3660                 }
3661         }
3662
3663         if (!IS_IQD(card)) {
3664                 if (!queue->do_pack) {
3665                         if ((atomic_read(&queue->used_buffers) >=
3666                                 (QETH_HIGH_WATERMARK_PACK -
3667                                  QETH_WATERMARK_PACK_FUZZ)) &&
3668                             !atomic_read(&queue->set_pci_flags_count)) {
3669                                 /* it's likely that we'll go to packing
3670                                  * mode soon */
3671                                 atomic_inc(&queue->set_pci_flags_count);
3672                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3673                         }
3674                 } else {
3675                         if (!atomic_read(&queue->set_pci_flags_count)) {
3676                                 /*
3677                                  * there's no outstanding PCI any more, so we
3678                                  * have to request a PCI to be sure the the PCI
3679                                  * will wake at some time in the future then we
3680                                  * can flush packed buffers that might still be
3681                                  * hanging around, which can happen if no
3682                                  * further send was requested by the stack
3683                                  */
3684                                 atomic_inc(&queue->set_pci_flags_count);
3685                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3686                         }
3687                 }
3688
3689                 if (atomic_read(&queue->set_pci_flags_count))
3690                         qdio_flags |= QDIO_FLAG_PCI_OUT;
3691         }
3692
3693         QETH_TXQ_STAT_INC(queue, doorbell);
3694         rc = do_QDIO(CARD_DDEV(queue->card), qdio_flags,
3695                      queue->queue_no, index, count);
3696
3697         switch (rc) {
3698         case 0:
3699         case -ENOBUFS:
3700                 /* ignore temporary SIGA errors without busy condition */
3701
3702                 /* Fake the TX completion interrupt: */
3703                 if (IS_IQD(card)) {
3704                         unsigned int frames = READ_ONCE(queue->max_coalesced_frames);
3705                         unsigned int usecs = READ_ONCE(queue->coalesce_usecs);
3706
3707                         if (frames && queue->coalesced_frames >= frames) {
3708                                 napi_schedule(&queue->napi);
3709                                 queue->coalesced_frames = 0;
3710                                 QETH_TXQ_STAT_INC(queue, coal_frames);
3711                         } else if (usecs) {
3712                                 qeth_tx_arm_timer(queue, usecs);
3713                         }
3714                 }
3715
3716                 break;
3717         default:
3718                 QETH_CARD_TEXT(queue->card, 2, "flushbuf");
3719                 QETH_CARD_TEXT_(queue->card, 2, " q%d", queue->queue_no);
3720                 QETH_CARD_TEXT_(queue->card, 2, " idx%d", index);
3721                 QETH_CARD_TEXT_(queue->card, 2, " c%d", count);
3722                 QETH_CARD_TEXT_(queue->card, 2, " err%d", rc);
3723
3724                 /* this must not happen under normal circumstances. if it
3725                  * happens something is really wrong -> recover */
3726                 qeth_schedule_recovery(queue->card);
3727         }
3728 }
3729
3730 static void qeth_flush_queue(struct qeth_qdio_out_q *queue)
3731 {
3732         qeth_flush_buffers(queue, queue->bulk_start, queue->bulk_count);
3733
3734         queue->bulk_start = QDIO_BUFNR(queue->bulk_start + queue->bulk_count);
3735         queue->prev_hdr = NULL;
3736         queue->bulk_count = 0;
3737 }
3738
3739 static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue)
3740 {
3741         /*
3742          * check if weed have to switch to non-packing mode or if
3743          * we have to get a pci flag out on the queue
3744          */
3745         if ((atomic_read(&queue->used_buffers) <= QETH_LOW_WATERMARK_PACK) ||
3746             !atomic_read(&queue->set_pci_flags_count)) {
3747                 unsigned int index, flush_cnt;
3748                 bool q_was_packing;
3749
3750                 spin_lock(&queue->lock);
3751
3752                 index = queue->next_buf_to_fill;
3753                 q_was_packing = queue->do_pack;
3754
3755                 flush_cnt = qeth_switch_to_nonpacking_if_needed(queue);
3756                 if (!flush_cnt && !atomic_read(&queue->set_pci_flags_count))
3757                         flush_cnt = qeth_prep_flush_pack_buffer(queue);
3758
3759                 if (flush_cnt) {
3760                         qeth_flush_buffers(queue, index, flush_cnt);
3761                         if (q_was_packing)
3762                                 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_cnt);
3763                 }
3764
3765                 spin_unlock(&queue->lock);
3766         }
3767 }
3768
3769 static void qeth_qdio_poll(struct ccw_device *cdev, unsigned long card_ptr)
3770 {
3771         struct qeth_card *card = (struct qeth_card *)card_ptr;
3772
3773         napi_schedule_irqoff(&card->napi);
3774 }
3775
3776 int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq)
3777 {
3778         int rc;
3779
3780         if (card->options.cq ==  QETH_CQ_NOTAVAILABLE) {
3781                 rc = -1;
3782                 goto out;
3783         } else {
3784                 if (card->options.cq == cq) {
3785                         rc = 0;
3786                         goto out;
3787                 }
3788
3789                 qeth_free_qdio_queues(card);
3790                 card->options.cq = cq;
3791                 rc = 0;
3792         }
3793 out:
3794         return rc;
3795
3796 }
3797 EXPORT_SYMBOL_GPL(qeth_configure_cq);
3798
3799 static void qeth_qdio_cq_handler(struct qeth_card *card, unsigned int qdio_err,
3800                                  unsigned int queue, int first_element,
3801                                  int count)
3802 {
3803         struct qeth_qdio_q *cq = card->qdio.c_q;
3804         int i;
3805         int rc;
3806
3807         QETH_CARD_TEXT_(card, 5, "qcqhe%d", first_element);
3808         QETH_CARD_TEXT_(card, 5, "qcqhc%d", count);
3809         QETH_CARD_TEXT_(card, 5, "qcqherr%d", qdio_err);
3810
3811         if (qdio_err) {
3812                 netif_tx_stop_all_queues(card->dev);
3813                 qeth_schedule_recovery(card);
3814                 return;
3815         }
3816
3817         for (i = first_element; i < first_element + count; ++i) {
3818                 struct qdio_buffer *buffer = cq->qdio_bufs[QDIO_BUFNR(i)];
3819                 int e = 0;
3820
3821                 while ((e < QDIO_MAX_ELEMENTS_PER_BUFFER) &&
3822                        buffer->element[e].addr) {
3823                         unsigned long phys_aob_addr = buffer->element[e].addr;
3824
3825                         qeth_qdio_handle_aob(card, phys_aob_addr);
3826                         ++e;
3827                 }
3828                 qeth_scrub_qdio_buffer(buffer, QDIO_MAX_ELEMENTS_PER_BUFFER);
3829         }
3830         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, queue,
3831                     card->qdio.c_q->next_buf_to_init,
3832                     count);
3833         if (rc) {
3834                 dev_warn(&card->gdev->dev,
3835                         "QDIO reported an error, rc=%i\n", rc);
3836                 QETH_CARD_TEXT(card, 2, "qcqherr");
3837         }
3838
3839         cq->next_buf_to_init = QDIO_BUFNR(cq->next_buf_to_init + count);
3840 }
3841
3842 static void qeth_qdio_input_handler(struct ccw_device *ccwdev,
3843                                     unsigned int qdio_err, int queue,
3844                                     int first_elem, int count,
3845                                     unsigned long card_ptr)
3846 {
3847         struct qeth_card *card = (struct qeth_card *)card_ptr;
3848
3849         QETH_CARD_TEXT_(card, 2, "qihq%d", queue);
3850         QETH_CARD_TEXT_(card, 2, "qiec%d", qdio_err);
3851
3852         if (qdio_err)
3853                 qeth_schedule_recovery(card);
3854 }
3855
3856 static void qeth_qdio_output_handler(struct ccw_device *ccwdev,
3857                                      unsigned int qdio_error, int __queue,
3858                                      int first_element, int count,
3859                                      unsigned long card_ptr)
3860 {
3861         struct qeth_card *card        = (struct qeth_card *) card_ptr;
3862         struct qeth_qdio_out_q *queue = card->qdio.out_qs[__queue];
3863         struct net_device *dev = card->dev;
3864         struct netdev_queue *txq;
3865         int i;
3866
3867         QETH_CARD_TEXT(card, 6, "qdouhdl");
3868         if (qdio_error & QDIO_ERROR_FATAL) {
3869                 QETH_CARD_TEXT(card, 2, "achkcond");
3870                 netif_tx_stop_all_queues(dev);
3871                 qeth_schedule_recovery(card);
3872                 return;
3873         }
3874
3875         for (i = first_element; i < (first_element + count); ++i) {
3876                 struct qeth_qdio_out_buffer *buf = queue->bufs[QDIO_BUFNR(i)];
3877
3878                 qeth_handle_send_error(card, buf, qdio_error);
3879                 qeth_clear_output_buffer(queue, buf, qdio_error, 0);
3880         }
3881
3882         atomic_sub(count, &queue->used_buffers);
3883         qeth_check_outbound_queue(queue);
3884
3885         txq = netdev_get_tx_queue(dev, __queue);
3886         /* xmit may have observed the full-condition, but not yet stopped the
3887          * txq. In which case the code below won't trigger. So before returning,
3888          * xmit will re-check the txq's fill level and wake it up if needed.
3889          */
3890         if (netif_tx_queue_stopped(txq) && !qeth_out_queue_is_full(queue))
3891                 netif_tx_wake_queue(txq);
3892 }
3893
3894 /**
3895  * Note: Function assumes that we have 4 outbound queues.
3896  */
3897 int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb)
3898 {
3899         struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
3900         u8 tos;
3901
3902         switch (card->qdio.do_prio_queueing) {
3903         case QETH_PRIO_Q_ING_TOS:
3904         case QETH_PRIO_Q_ING_PREC:
3905                 switch (vlan_get_protocol(skb)) {
3906                 case htons(ETH_P_IP):
3907                         tos = ipv4_get_dsfield(ip_hdr(skb));
3908                         break;
3909                 case htons(ETH_P_IPV6):
3910                         tos = ipv6_get_dsfield(ipv6_hdr(skb));
3911                         break;
3912                 default:
3913                         return card->qdio.default_out_queue;
3914                 }
3915                 if (card->qdio.do_prio_queueing == QETH_PRIO_Q_ING_PREC)
3916                         return ~tos >> 6 & 3;
3917                 if (tos & IPTOS_MINCOST)
3918                         return 3;
3919                 if (tos & IPTOS_RELIABILITY)
3920                         return 2;
3921                 if (tos & IPTOS_THROUGHPUT)
3922                         return 1;
3923                 if (tos & IPTOS_LOWDELAY)
3924                         return 0;
3925                 break;
3926         case QETH_PRIO_Q_ING_SKB:
3927                 if (skb->priority > 5)
3928                         return 0;
3929                 return ~skb->priority >> 1 & 3;
3930         case QETH_PRIO_Q_ING_VLAN:
3931                 if (veth->h_vlan_proto == htons(ETH_P_8021Q))
3932                         return ~ntohs(veth->h_vlan_TCI) >>
3933                                (VLAN_PRIO_SHIFT + 1) & 3;
3934                 break;
3935         case QETH_PRIO_Q_ING_FIXED:
3936                 return card->qdio.default_out_queue;
3937         default:
3938                 break;
3939         }
3940         return card->qdio.default_out_queue;
3941 }
3942 EXPORT_SYMBOL_GPL(qeth_get_priority_queue);
3943
3944 /**
3945  * qeth_get_elements_for_frags() -      find number of SBALEs for skb frags.
3946  * @skb:                                SKB address
3947  *
3948  * Returns the number of pages, and thus QDIO buffer elements, needed to cover
3949  * fragmented part of the SKB. Returns zero for linear SKB.
3950  */
3951 static int qeth_get_elements_for_frags(struct sk_buff *skb)
3952 {
3953         int cnt, elements = 0;
3954
3955         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3956                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
3957
3958                 elements += qeth_get_elements_for_range(
3959                         (addr_t)skb_frag_address(frag),
3960                         (addr_t)skb_frag_address(frag) + skb_frag_size(frag));
3961         }
3962         return elements;
3963 }
3964
3965 /**
3966  * qeth_count_elements() -      Counts the number of QDIO buffer elements needed
3967  *                              to transmit an skb.
3968  * @skb:                        the skb to operate on.
3969  * @data_offset:                skip this part of the skb's linear data
3970  *
3971  * Returns the number of pages, and thus QDIO buffer elements, needed to map the
3972  * skb's data (both its linear part and paged fragments).
3973  */
3974 unsigned int qeth_count_elements(struct sk_buff *skb, unsigned int data_offset)
3975 {
3976         unsigned int elements = qeth_get_elements_for_frags(skb);
3977         addr_t end = (addr_t)skb->data + skb_headlen(skb);
3978         addr_t start = (addr_t)skb->data + data_offset;
3979
3980         if (start != end)
3981                 elements += qeth_get_elements_for_range(start, end);
3982         return elements;
3983 }
3984 EXPORT_SYMBOL_GPL(qeth_count_elements);
3985
3986 #define QETH_HDR_CACHE_OBJ_SIZE         (sizeof(struct qeth_hdr_tso) + \
3987                                          MAX_TCP_HEADER)
3988
3989 /**
3990  * qeth_add_hw_header() - add a HW header to an skb.
3991  * @skb: skb that the HW header should be added to.
3992  * @hdr: double pointer to a qeth_hdr. When returning with >= 0,
3993  *       it contains a valid pointer to a qeth_hdr.
3994  * @hdr_len: length of the HW header.
3995  * @proto_len: length of protocol headers that need to be in same page as the
3996  *             HW header.
3997  *
3998  * Returns the pushed length. If the header can't be pushed on
3999  * (eg. because it would cross a page boundary), it is allocated from
4000  * the cache instead and 0 is returned.
4001  * The number of needed buffer elements is returned in @elements.
4002  * Error to create the hdr is indicated by returning with < 0.
4003  */
4004 static int qeth_add_hw_header(struct qeth_qdio_out_q *queue,
4005                               struct sk_buff *skb, struct qeth_hdr **hdr,
4006                               unsigned int hdr_len, unsigned int proto_len,
4007                               unsigned int *elements)
4008 {
4009         gfp_t gfp = GFP_ATOMIC | (skb_pfmemalloc(skb) ? __GFP_MEMALLOC : 0);
4010         const unsigned int contiguous = proto_len ? proto_len : 1;
4011         const unsigned int max_elements = queue->max_elements;
4012         unsigned int __elements;
4013         addr_t start, end;
4014         bool push_ok;
4015         int rc;
4016
4017 check_layout:
4018         start = (addr_t)skb->data - hdr_len;
4019         end = (addr_t)skb->data;
4020
4021         if (qeth_get_elements_for_range(start, end + contiguous) == 1) {
4022                 /* Push HW header into same page as first protocol header. */
4023                 push_ok = true;
4024                 /* ... but TSO always needs a separate element for headers: */
4025                 if (skb_is_gso(skb))
4026                         __elements = 1 + qeth_count_elements(skb, proto_len);
4027                 else
4028                         __elements = qeth_count_elements(skb, 0);
4029         } else if (!proto_len && PAGE_ALIGNED(skb->data)) {
4030                 /* Push HW header into preceding page, flush with skb->data. */
4031                 push_ok = true;
4032                 __elements = 1 + qeth_count_elements(skb, 0);
4033         } else {
4034                 /* Use header cache, copy protocol headers up. */
4035                 push_ok = false;
4036                 __elements = 1 + qeth_count_elements(skb, proto_len);
4037         }
4038
4039         /* Compress skb to fit into one IO buffer: */
4040         if (__elements > max_elements) {
4041                 if (!skb_is_nonlinear(skb)) {
4042                         /* Drop it, no easy way of shrinking it further. */
4043                         QETH_DBF_MESSAGE(2, "Dropped an oversized skb (Max Elements=%u / Actual=%u / Length=%u).\n",
4044                                          max_elements, __elements, skb->len);
4045                         return -E2BIG;
4046                 }
4047
4048                 rc = skb_linearize(skb);
4049                 if (rc) {
4050                         QETH_TXQ_STAT_INC(queue, skbs_linearized_fail);
4051                         return rc;
4052                 }
4053
4054                 QETH_TXQ_STAT_INC(queue, skbs_linearized);
4055                 /* Linearization changed the layout, re-evaluate: */
4056                 goto check_layout;
4057         }
4058
4059         *elements = __elements;
4060         /* Add the header: */
4061         if (push_ok) {
4062                 *hdr = skb_push(skb, hdr_len);
4063                 return hdr_len;
4064         }
4065
4066         /* Fall back to cache element with known-good alignment: */
4067         if (hdr_len + proto_len > QETH_HDR_CACHE_OBJ_SIZE)
4068                 return -E2BIG;
4069         *hdr = kmem_cache_alloc(qeth_core_header_cache, gfp);
4070         if (!*hdr)
4071                 return -ENOMEM;
4072         /* Copy protocol headers behind HW header: */
4073         skb_copy_from_linear_data(skb, ((char *)*hdr) + hdr_len, proto_len);
4074         return 0;
4075 }
4076
4077 static bool qeth_iqd_may_bulk(struct qeth_qdio_out_q *queue,
4078                               struct sk_buff *curr_skb,
4079                               struct qeth_hdr *curr_hdr)
4080 {
4081         struct qeth_qdio_out_buffer *buffer = queue->bufs[queue->bulk_start];
4082         struct qeth_hdr *prev_hdr = queue->prev_hdr;
4083
4084         if (!prev_hdr)
4085                 return true;
4086
4087         /* All packets must have the same target: */
4088         if (curr_hdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER2) {
4089                 struct sk_buff *prev_skb = skb_peek(&buffer->skb_list);
4090
4091                 return ether_addr_equal(eth_hdr(prev_skb)->h_dest,
4092                                         eth_hdr(curr_skb)->h_dest) &&
4093                        qeth_l2_same_vlan(&prev_hdr->hdr.l2, &curr_hdr->hdr.l2);
4094         }
4095
4096         return qeth_l3_same_next_hop(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3) &&
4097                qeth_l3_iqd_same_vlan(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3);
4098 }
4099
4100 /**
4101  * qeth_fill_buffer() - map skb into an output buffer
4102  * @buf:        buffer to transport the skb
4103  * @skb:        skb to map into the buffer
4104  * @hdr:        qeth_hdr for this skb. Either at skb->data, or allocated
4105  *              from qeth_core_header_cache.
4106  * @offset:     when mapping the skb, start at skb->data + offset
4107  * @hd_len:     if > 0, build a dedicated header element of this size
4108  */
4109 static unsigned int qeth_fill_buffer(struct qeth_qdio_out_buffer *buf,
4110                                      struct sk_buff *skb, struct qeth_hdr *hdr,
4111                                      unsigned int offset, unsigned int hd_len)
4112 {
4113         struct qdio_buffer *buffer = buf->buffer;
4114         int element = buf->next_element_to_fill;
4115         int length = skb_headlen(skb) - offset;
4116         char *data = skb->data + offset;
4117         unsigned int elem_length, cnt;
4118         bool is_first_elem = true;
4119
4120         __skb_queue_tail(&buf->skb_list, skb);
4121
4122         /* build dedicated element for HW Header */
4123         if (hd_len) {
4124                 is_first_elem = false;
4125
4126                 buffer->element[element].addr = virt_to_phys(hdr);
4127                 buffer->element[element].length = hd_len;
4128                 buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
4129
4130                 /* HW header is allocated from cache: */
4131                 if ((void *)hdr != skb->data)
4132                         buf->is_header[element] = 1;
4133                 /* HW header was pushed and is contiguous with linear part: */
4134                 else if (length > 0 && !PAGE_ALIGNED(data) &&
4135                          (data == (char *)hdr + hd_len))
4136                         buffer->element[element].eflags |=
4137                                 SBAL_EFLAGS_CONTIGUOUS;
4138
4139                 element++;
4140         }
4141
4142         /* map linear part into buffer element(s) */
4143         while (length > 0) {
4144                 elem_length = min_t(unsigned int, length,
4145                                     PAGE_SIZE - offset_in_page(data));
4146
4147                 buffer->element[element].addr = virt_to_phys(data);
4148                 buffer->element[element].length = elem_length;
4149                 length -= elem_length;
4150                 if (is_first_elem) {
4151                         is_first_elem = false;
4152                         if (length || skb_is_nonlinear(skb))
4153                                 /* skb needs additional elements */
4154                                 buffer->element[element].eflags =
4155                                         SBAL_EFLAGS_FIRST_FRAG;
4156                         else
4157                                 buffer->element[element].eflags = 0;
4158                 } else {
4159                         buffer->element[element].eflags =
4160                                 SBAL_EFLAGS_MIDDLE_FRAG;
4161                 }
4162
4163                 data += elem_length;
4164                 element++;
4165         }
4166
4167         /* map page frags into buffer element(s) */
4168         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
4169                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
4170
4171                 data = skb_frag_address(frag);
4172                 length = skb_frag_size(frag);
4173                 while (length > 0) {
4174                         elem_length = min_t(unsigned int, length,
4175                                             PAGE_SIZE - offset_in_page(data));
4176
4177                         buffer->element[element].addr = virt_to_phys(data);
4178                         buffer->element[element].length = elem_length;
4179                         buffer->element[element].eflags =
4180                                 SBAL_EFLAGS_MIDDLE_FRAG;
4181
4182                         length -= elem_length;
4183                         data += elem_length;
4184                         element++;
4185                 }
4186         }
4187
4188         if (buffer->element[element - 1].eflags)
4189                 buffer->element[element - 1].eflags = SBAL_EFLAGS_LAST_FRAG;
4190         buf->next_element_to_fill = element;
4191         return element;
4192 }
4193
4194 static int __qeth_xmit(struct qeth_card *card, struct qeth_qdio_out_q *queue,
4195                        struct sk_buff *skb, unsigned int elements,
4196                        struct qeth_hdr *hdr, unsigned int offset,
4197                        unsigned int hd_len)
4198 {
4199         unsigned int bytes = qdisc_pkt_len(skb);
4200         struct qeth_qdio_out_buffer *buffer;
4201         unsigned int next_element;
4202         struct netdev_queue *txq;
4203         bool stopped = false;
4204         bool flush;
4205
4206         buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start + queue->bulk_count)];
4207         txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
4208
4209         /* Just a sanity check, the wake/stop logic should ensure that we always
4210          * get a free buffer.
4211          */
4212         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4213                 return -EBUSY;
4214
4215         flush = !qeth_iqd_may_bulk(queue, skb, hdr);
4216
4217         if (flush ||
4218             (buffer->next_element_to_fill + elements > queue->max_elements)) {
4219                 if (buffer->next_element_to_fill > 0) {
4220                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4221                         queue->bulk_count++;
4222                 }
4223
4224                 if (queue->bulk_count >= queue->bulk_max)
4225                         flush = true;
4226
4227                 if (flush)
4228                         qeth_flush_queue(queue);
4229
4230                 buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start +
4231                                                 queue->bulk_count)];
4232
4233                 /* Sanity-check again: */
4234                 if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4235                         return -EBUSY;
4236         }
4237
4238         if (buffer->next_element_to_fill == 0 &&
4239             atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
4240                 /* If a TX completion happens right _here_ and misses to wake
4241                  * the txq, then our re-check below will catch the race.
4242                  */
4243                 QETH_TXQ_STAT_INC(queue, stopped);
4244                 netif_tx_stop_queue(txq);
4245                 stopped = true;
4246         }
4247
4248         next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
4249         buffer->bytes += bytes;
4250         buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
4251         queue->prev_hdr = hdr;
4252
4253         flush = __netdev_tx_sent_queue(txq, bytes,
4254                                        !stopped && netdev_xmit_more());
4255
4256         if (flush || next_element >= queue->max_elements) {
4257                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4258                 queue->bulk_count++;
4259
4260                 if (queue->bulk_count >= queue->bulk_max)
4261                         flush = true;
4262
4263                 if (flush)
4264                         qeth_flush_queue(queue);
4265         }
4266
4267         if (stopped && !qeth_out_queue_is_full(queue))
4268                 netif_tx_start_queue(txq);
4269         return 0;
4270 }
4271
4272 int qeth_do_send_packet(struct qeth_card *card, struct qeth_qdio_out_q *queue,
4273                         struct sk_buff *skb, struct qeth_hdr *hdr,
4274                         unsigned int offset, unsigned int hd_len,
4275                         int elements_needed)
4276 {
4277         unsigned int start_index = queue->next_buf_to_fill;
4278         struct qeth_qdio_out_buffer *buffer;
4279         unsigned int next_element;
4280         struct netdev_queue *txq;
4281         bool stopped = false;
4282         int flush_count = 0;
4283         int do_pack = 0;
4284         int rc = 0;
4285
4286         buffer = queue->bufs[queue->next_buf_to_fill];
4287
4288         /* Just a sanity check, the wake/stop logic should ensure that we always
4289          * get a free buffer.
4290          */
4291         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4292                 return -EBUSY;
4293
4294         txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
4295
4296         /* check if we need to switch packing state of this queue */
4297         qeth_switch_to_packing_if_needed(queue);
4298         if (queue->do_pack) {
4299                 do_pack = 1;
4300                 /* does packet fit in current buffer? */
4301                 if (buffer->next_element_to_fill + elements_needed >
4302                     queue->max_elements) {
4303                         /* ... no -> set state PRIMED */
4304                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4305                         flush_count++;
4306                         queue->next_buf_to_fill =
4307                                 QDIO_BUFNR(queue->next_buf_to_fill + 1);
4308                         buffer = queue->bufs[queue->next_buf_to_fill];
4309
4310                         /* We stepped forward, so sanity-check again: */
4311                         if (atomic_read(&buffer->state) !=
4312                             QETH_QDIO_BUF_EMPTY) {
4313                                 qeth_flush_buffers(queue, start_index,
4314                                                            flush_count);
4315                                 rc = -EBUSY;
4316                                 goto out;
4317                         }
4318                 }
4319         }
4320
4321         if (buffer->next_element_to_fill == 0 &&
4322             atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
4323                 /* If a TX completion happens right _here_ and misses to wake
4324                  * the txq, then our re-check below will catch the race.
4325                  */
4326                 QETH_TXQ_STAT_INC(queue, stopped);
4327                 netif_tx_stop_queue(txq);
4328                 stopped = true;
4329         }
4330
4331         next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
4332         buffer->bytes += qdisc_pkt_len(skb);
4333         buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
4334
4335         if (queue->do_pack)
4336                 QETH_TXQ_STAT_INC(queue, skbs_pack);
4337         if (!queue->do_pack || stopped || next_element >= queue->max_elements) {
4338                 flush_count++;
4339                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4340                 queue->next_buf_to_fill =
4341                                 QDIO_BUFNR(queue->next_buf_to_fill + 1);
4342         }
4343
4344         if (flush_count)
4345                 qeth_flush_buffers(queue, start_index, flush_count);
4346
4347 out:
4348         if (do_pack)
4349                 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_count);
4350
4351         if (stopped && !qeth_out_queue_is_full(queue))
4352                 netif_tx_start_queue(txq);
4353         return rc;
4354 }
4355 EXPORT_SYMBOL_GPL(qeth_do_send_packet);
4356
4357 static void qeth_fill_tso_ext(struct qeth_hdr_tso *hdr,
4358                               unsigned int payload_len, struct sk_buff *skb,
4359                               unsigned int proto_len)
4360 {
4361         struct qeth_hdr_ext_tso *ext = &hdr->ext;
4362
4363         ext->hdr_tot_len = sizeof(*ext);
4364         ext->imb_hdr_no = 1;
4365         ext->hdr_type = 1;
4366         ext->hdr_version = 1;
4367         ext->hdr_len = 28;
4368         ext->payload_len = payload_len;
4369         ext->mss = skb_shinfo(skb)->gso_size;
4370         ext->dg_hdr_len = proto_len;
4371 }
4372
4373 int qeth_xmit(struct qeth_card *card, struct sk_buff *skb,
4374               struct qeth_qdio_out_q *queue, __be16 proto,
4375               void (*fill_header)(struct qeth_qdio_out_q *queue,
4376                                   struct qeth_hdr *hdr, struct sk_buff *skb,
4377                                   __be16 proto, unsigned int data_len))
4378 {
4379         unsigned int proto_len, hw_hdr_len;
4380         unsigned int frame_len = skb->len;
4381         bool is_tso = skb_is_gso(skb);
4382         unsigned int data_offset = 0;
4383         struct qeth_hdr *hdr = NULL;
4384         unsigned int hd_len = 0;
4385         unsigned int elements;
4386         int push_len, rc;
4387
4388         if (is_tso) {
4389                 hw_hdr_len = sizeof(struct qeth_hdr_tso);
4390                 proto_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
4391         } else {
4392                 hw_hdr_len = sizeof(struct qeth_hdr);
4393                 proto_len = (IS_IQD(card) && IS_LAYER2(card)) ? ETH_HLEN : 0;
4394         }
4395
4396         rc = skb_cow_head(skb, hw_hdr_len);
4397         if (rc)
4398                 return rc;
4399
4400         push_len = qeth_add_hw_header(queue, skb, &hdr, hw_hdr_len, proto_len,
4401                                       &elements);
4402         if (push_len < 0)
4403                 return push_len;
4404         if (is_tso || !push_len) {
4405                 /* HW header needs its own buffer element. */
4406                 hd_len = hw_hdr_len + proto_len;
4407                 data_offset = push_len + proto_len;
4408         }
4409         memset(hdr, 0, hw_hdr_len);
4410         fill_header(queue, hdr, skb, proto, frame_len);
4411         if (is_tso)
4412                 qeth_fill_tso_ext((struct qeth_hdr_tso *) hdr,
4413                                   frame_len - proto_len, skb, proto_len);
4414
4415         if (IS_IQD(card)) {
4416                 rc = __qeth_xmit(card, queue, skb, elements, hdr, data_offset,
4417                                  hd_len);
4418         } else {
4419                 /* TODO: drop skb_orphan() once TX completion is fast enough */
4420                 skb_orphan(skb);
4421                 spin_lock(&queue->lock);
4422                 rc = qeth_do_send_packet(card, queue, skb, hdr, data_offset,
4423                                          hd_len, elements);
4424                 spin_unlock(&queue->lock);
4425         }
4426
4427         if (rc && !push_len)
4428                 kmem_cache_free(qeth_core_header_cache, hdr);
4429
4430         return rc;
4431 }
4432 EXPORT_SYMBOL_GPL(qeth_xmit);
4433
4434 static int qeth_setadp_promisc_mode_cb(struct qeth_card *card,
4435                 struct qeth_reply *reply, unsigned long data)
4436 {
4437         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4438         struct qeth_ipacmd_setadpparms *setparms;
4439
4440         QETH_CARD_TEXT(card, 4, "prmadpcb");
4441
4442         setparms = &(cmd->data.setadapterparms);
4443         if (qeth_setadpparms_inspect_rc(cmd)) {
4444                 QETH_CARD_TEXT_(card, 4, "prmrc%x", cmd->hdr.return_code);
4445                 setparms->data.mode = SET_PROMISC_MODE_OFF;
4446         }
4447         card->info.promisc_mode = setparms->data.mode;
4448         return (cmd->hdr.return_code) ? -EIO : 0;
4449 }
4450
4451 void qeth_setadp_promisc_mode(struct qeth_card *card, bool enable)
4452 {
4453         enum qeth_ipa_promisc_modes mode = enable ? SET_PROMISC_MODE_ON :
4454                                                     SET_PROMISC_MODE_OFF;
4455         struct qeth_cmd_buffer *iob;
4456         struct qeth_ipa_cmd *cmd;
4457
4458         QETH_CARD_TEXT(card, 4, "setprom");
4459         QETH_CARD_TEXT_(card, 4, "mode:%x", mode);
4460
4461         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE,
4462                                    SETADP_DATA_SIZEOF(mode));
4463         if (!iob)
4464                 return;
4465         cmd = __ipa_cmd(iob);
4466         cmd->data.setadapterparms.data.mode = mode;
4467         qeth_send_ipa_cmd(card, iob, qeth_setadp_promisc_mode_cb, NULL);
4468 }
4469 EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode);
4470
4471 static int qeth_setadpparms_change_macaddr_cb(struct qeth_card *card,
4472                 struct qeth_reply *reply, unsigned long data)
4473 {
4474         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4475         struct qeth_ipacmd_setadpparms *adp_cmd;
4476
4477         QETH_CARD_TEXT(card, 4, "chgmaccb");
4478         if (qeth_setadpparms_inspect_rc(cmd))
4479                 return -EIO;
4480
4481         adp_cmd = &cmd->data.setadapterparms;
4482         if (!is_valid_ether_addr(adp_cmd->data.change_addr.addr))
4483                 return -EADDRNOTAVAIL;
4484
4485         if (IS_LAYER2(card) && IS_OSD(card) && !IS_VM_NIC(card) &&
4486             !(adp_cmd->hdr.flags & QETH_SETADP_FLAGS_VIRTUAL_MAC))
4487                 return -EADDRNOTAVAIL;
4488
4489         ether_addr_copy(card->dev->dev_addr, adp_cmd->data.change_addr.addr);
4490         return 0;
4491 }
4492
4493 int qeth_setadpparms_change_macaddr(struct qeth_card *card)
4494 {
4495         int rc;
4496         struct qeth_cmd_buffer *iob;
4497         struct qeth_ipa_cmd *cmd;
4498
4499         QETH_CARD_TEXT(card, 4, "chgmac");
4500
4501         iob = qeth_get_adapter_cmd(card, IPA_SETADP_ALTER_MAC_ADDRESS,
4502                                    SETADP_DATA_SIZEOF(change_addr));
4503         if (!iob)
4504                 return -ENOMEM;
4505         cmd = __ipa_cmd(iob);
4506         cmd->data.setadapterparms.data.change_addr.cmd = CHANGE_ADDR_READ_MAC;
4507         cmd->data.setadapterparms.data.change_addr.addr_size = ETH_ALEN;
4508         ether_addr_copy(cmd->data.setadapterparms.data.change_addr.addr,
4509                         card->dev->dev_addr);
4510         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_change_macaddr_cb,
4511                                NULL);
4512         return rc;
4513 }
4514 EXPORT_SYMBOL_GPL(qeth_setadpparms_change_macaddr);
4515
4516 static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card,
4517                 struct qeth_reply *reply, unsigned long data)
4518 {
4519         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4520         struct qeth_set_access_ctrl *access_ctrl_req;
4521
4522         QETH_CARD_TEXT(card, 4, "setaccb");
4523
4524         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4525         QETH_CARD_TEXT_(card, 2, "rc=%d",
4526                         cmd->data.setadapterparms.hdr.return_code);
4527         if (cmd->data.setadapterparms.hdr.return_code !=
4528                                                 SET_ACCESS_CTRL_RC_SUCCESS)
4529                 QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%#x) on device %x: %#x\n",
4530                                  access_ctrl_req->subcmd_code, CARD_DEVID(card),
4531                                  cmd->data.setadapterparms.hdr.return_code);
4532         switch (qeth_setadpparms_inspect_rc(cmd)) {
4533         case SET_ACCESS_CTRL_RC_SUCCESS:
4534                 if (access_ctrl_req->subcmd_code == ISOLATION_MODE_NONE)
4535                         dev_info(&card->gdev->dev,
4536                             "QDIO data connection isolation is deactivated\n");
4537                 else
4538                         dev_info(&card->gdev->dev,
4539                             "QDIO data connection isolation is activated\n");
4540                 return 0;
4541         case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
4542                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already deactivated\n",
4543                                  CARD_DEVID(card));
4544                 return 0;
4545         case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
4546                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already activated\n",
4547                                  CARD_DEVID(card));
4548                 return 0;
4549         case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
4550                 dev_err(&card->gdev->dev, "Adapter does not "
4551                         "support QDIO data connection isolation\n");
4552                 return -EOPNOTSUPP;
4553         case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
4554                 dev_err(&card->gdev->dev,
4555                         "Adapter is dedicated. "
4556                         "QDIO data connection isolation not supported\n");
4557                 return -EOPNOTSUPP;
4558         case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
4559                 dev_err(&card->gdev->dev,
4560                         "TSO does not permit QDIO data connection isolation\n");
4561                 return -EPERM;
4562         case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED:
4563                 dev_err(&card->gdev->dev, "The adjacent switch port does not "
4564                         "support reflective relay mode\n");
4565                 return -EOPNOTSUPP;
4566         case SET_ACCESS_CTRL_RC_REFLREL_FAILED:
4567                 dev_err(&card->gdev->dev, "The reflective relay mode cannot be "
4568                                         "enabled at the adjacent switch port");
4569                 return -EREMOTEIO;
4570         case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED:
4571                 dev_warn(&card->gdev->dev, "Turning off reflective relay mode "
4572                                         "at the adjacent switch failed\n");
4573                 /* benign error while disabling ISOLATION_MODE_FWD */
4574                 return 0;
4575         default:
4576                 return -EIO;
4577         }
4578 }
4579
4580 int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
4581                                      enum qeth_ipa_isolation_modes mode)
4582 {
4583         int rc;
4584         struct qeth_cmd_buffer *iob;
4585         struct qeth_ipa_cmd *cmd;
4586         struct qeth_set_access_ctrl *access_ctrl_req;
4587
4588         QETH_CARD_TEXT(card, 4, "setacctl");
4589
4590         if (!qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) {
4591                 dev_err(&card->gdev->dev,
4592                         "Adapter does not support QDIO data connection isolation\n");
4593                 return -EOPNOTSUPP;
4594         }
4595
4596         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL,
4597                                    SETADP_DATA_SIZEOF(set_access_ctrl));
4598         if (!iob)
4599                 return -ENOMEM;
4600         cmd = __ipa_cmd(iob);
4601         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4602         access_ctrl_req->subcmd_code = mode;
4603
4604         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb,
4605                                NULL);
4606         if (rc) {
4607                 QETH_CARD_TEXT_(card, 2, "rc=%d", rc);
4608                 QETH_DBF_MESSAGE(3, "IPA(SET_ACCESS_CTRL(%d) on device %x: sent failed\n",
4609                                  rc, CARD_DEVID(card));
4610         }
4611
4612         return rc;
4613 }
4614
4615 void qeth_tx_timeout(struct net_device *dev, unsigned int txqueue)
4616 {
4617         struct qeth_card *card;
4618
4619         card = dev->ml_priv;
4620         QETH_CARD_TEXT(card, 4, "txtimeo");
4621         qeth_schedule_recovery(card);
4622 }
4623 EXPORT_SYMBOL_GPL(qeth_tx_timeout);
4624
4625 static int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum)
4626 {
4627         struct qeth_card *card = dev->ml_priv;
4628         int rc = 0;
4629
4630         switch (regnum) {
4631         case MII_BMCR: /* Basic mode control register */
4632                 rc = BMCR_FULLDPLX;
4633                 if ((card->info.link_type != QETH_LINK_TYPE_GBIT_ETH) &&
4634                     (card->info.link_type != QETH_LINK_TYPE_OSN) &&
4635                     (card->info.link_type != QETH_LINK_TYPE_10GBIT_ETH) &&
4636                     (card->info.link_type != QETH_LINK_TYPE_25GBIT_ETH))
4637                         rc |= BMCR_SPEED100;
4638                 break;
4639         case MII_BMSR: /* Basic mode status register */
4640                 rc = BMSR_ERCAP | BMSR_ANEGCOMPLETE | BMSR_LSTATUS |
4641                      BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | BMSR_100FULL |
4642                      BMSR_100BASE4;
4643                 break;
4644         case MII_PHYSID1: /* PHYS ID 1 */
4645                 rc = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 8) |
4646                      dev->dev_addr[2];
4647                 rc = (rc >> 5) & 0xFFFF;
4648                 break;
4649         case MII_PHYSID2: /* PHYS ID 2 */
4650                 rc = (dev->dev_addr[2] << 10) & 0xFFFF;
4651                 break;
4652         case MII_ADVERTISE: /* Advertisement control reg */
4653                 rc = ADVERTISE_ALL;
4654                 break;
4655         case MII_LPA: /* Link partner ability reg */
4656                 rc = LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL |
4657                      LPA_100BASE4 | LPA_LPACK;
4658                 break;
4659         case MII_EXPANSION: /* Expansion register */
4660                 break;
4661         case MII_DCOUNTER: /* disconnect counter */
4662                 break;
4663         case MII_FCSCOUNTER: /* false carrier counter */
4664                 break;
4665         case MII_NWAYTEST: /* N-way auto-neg test register */
4666                 break;
4667         case MII_RERRCOUNTER: /* rx error counter */
4668                 rc = card->stats.rx_length_errors +
4669                      card->stats.rx_frame_errors +
4670                      card->stats.rx_fifo_errors;
4671                 break;
4672         case MII_SREVISION: /* silicon revision */
4673                 break;
4674         case MII_RESV1: /* reserved 1 */
4675                 break;
4676         case MII_LBRERROR: /* loopback, rx, bypass error */
4677                 break;
4678         case MII_PHYADDR: /* physical address */
4679                 break;
4680         case MII_RESV2: /* reserved 2 */
4681                 break;
4682         case MII_TPISTATUS: /* TPI status for 10mbps */
4683                 break;
4684         case MII_NCONFIG: /* network interface config */
4685                 break;
4686         default:
4687                 break;
4688         }
4689         return rc;
4690 }
4691
4692 static int qeth_snmp_command_cb(struct qeth_card *card,
4693                                 struct qeth_reply *reply, unsigned long data)
4694 {
4695         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4696         struct qeth_arp_query_info *qinfo = reply->param;
4697         struct qeth_ipacmd_setadpparms *adp_cmd;
4698         unsigned int data_len;
4699         void *snmp_data;
4700
4701         QETH_CARD_TEXT(card, 3, "snpcmdcb");
4702
4703         if (cmd->hdr.return_code) {
4704                 QETH_CARD_TEXT_(card, 4, "scer1%x", cmd->hdr.return_code);
4705                 return -EIO;
4706         }
4707         if (cmd->data.setadapterparms.hdr.return_code) {
4708                 cmd->hdr.return_code =
4709                         cmd->data.setadapterparms.hdr.return_code;
4710                 QETH_CARD_TEXT_(card, 4, "scer2%x", cmd->hdr.return_code);
4711                 return -EIO;
4712         }
4713
4714         adp_cmd = &cmd->data.setadapterparms;
4715         data_len = adp_cmd->hdr.cmdlength - sizeof(adp_cmd->hdr);
4716         if (adp_cmd->hdr.seq_no == 1) {
4717                 snmp_data = &adp_cmd->data.snmp;
4718         } else {
4719                 snmp_data = &adp_cmd->data.snmp.request;
4720                 data_len -= offsetof(struct qeth_snmp_cmd, request);
4721         }
4722
4723         /* check if there is enough room in userspace */
4724         if ((qinfo->udata_len - qinfo->udata_offset) < data_len) {
4725                 QETH_CARD_TEXT_(card, 4, "scer3%i", -ENOSPC);
4726                 return -ENOSPC;
4727         }
4728         QETH_CARD_TEXT_(card, 4, "snore%i",
4729                         cmd->data.setadapterparms.hdr.used_total);
4730         QETH_CARD_TEXT_(card, 4, "sseqn%i",
4731                         cmd->data.setadapterparms.hdr.seq_no);
4732         /*copy entries to user buffer*/
4733         memcpy(qinfo->udata + qinfo->udata_offset, snmp_data, data_len);
4734         qinfo->udata_offset += data_len;
4735
4736         if (cmd->data.setadapterparms.hdr.seq_no <
4737             cmd->data.setadapterparms.hdr.used_total)
4738                 return 1;
4739         return 0;
4740 }
4741
4742 static int qeth_snmp_command(struct qeth_card *card, char __user *udata)
4743 {
4744         struct qeth_snmp_ureq __user *ureq;
4745         struct qeth_cmd_buffer *iob;
4746         unsigned int req_len;
4747         struct qeth_arp_query_info qinfo = {0, };
4748         int rc = 0;
4749
4750         QETH_CARD_TEXT(card, 3, "snmpcmd");
4751
4752         if (IS_VM_NIC(card))
4753                 return -EOPNOTSUPP;
4754
4755         if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) &&
4756             IS_LAYER3(card))
4757                 return -EOPNOTSUPP;
4758
4759         ureq = (struct qeth_snmp_ureq __user *) udata;
4760         if (get_user(qinfo.udata_len, &ureq->hdr.data_len) ||
4761             get_user(req_len, &ureq->hdr.req_len))
4762                 return -EFAULT;
4763
4764         /* Sanitize user input, to avoid overflows in iob size calculation: */
4765         if (req_len > QETH_BUFSIZE)
4766                 return -EINVAL;
4767
4768         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL, req_len);
4769         if (!iob)
4770                 return -ENOMEM;
4771
4772         if (copy_from_user(&__ipa_cmd(iob)->data.setadapterparms.data.snmp,
4773                            &ureq->cmd, req_len)) {
4774                 qeth_put_cmd(iob);
4775                 return -EFAULT;
4776         }
4777
4778         qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
4779         if (!qinfo.udata) {
4780                 qeth_put_cmd(iob);
4781                 return -ENOMEM;
4782         }
4783         qinfo.udata_offset = sizeof(struct qeth_snmp_ureq_hdr);
4784
4785         rc = qeth_send_ipa_cmd(card, iob, qeth_snmp_command_cb, &qinfo);
4786         if (rc)
4787                 QETH_DBF_MESSAGE(2, "SNMP command failed on device %x: (%#x)\n",
4788                                  CARD_DEVID(card), rc);
4789         else {
4790                 if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
4791                         rc = -EFAULT;
4792         }
4793
4794         kfree(qinfo.udata);
4795         return rc;
4796 }
4797
4798 static int qeth_setadpparms_query_oat_cb(struct qeth_card *card,
4799                                          struct qeth_reply *reply,
4800                                          unsigned long data)
4801 {
4802         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4803         struct qeth_qoat_priv *priv = reply->param;
4804         int resdatalen;
4805
4806         QETH_CARD_TEXT(card, 3, "qoatcb");
4807         if (qeth_setadpparms_inspect_rc(cmd))
4808                 return -EIO;
4809
4810         resdatalen = cmd->data.setadapterparms.hdr.cmdlength;
4811
4812         if (resdatalen > (priv->buffer_len - priv->response_len))
4813                 return -ENOSPC;
4814
4815         memcpy(priv->buffer + priv->response_len,
4816                &cmd->data.setadapterparms.hdr, resdatalen);
4817         priv->response_len += resdatalen;
4818
4819         if (cmd->data.setadapterparms.hdr.seq_no <
4820             cmd->data.setadapterparms.hdr.used_total)
4821                 return 1;
4822         return 0;
4823 }
4824
4825 static int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
4826 {
4827         int rc = 0;
4828         struct qeth_cmd_buffer *iob;
4829         struct qeth_ipa_cmd *cmd;
4830         struct qeth_query_oat *oat_req;
4831         struct qeth_query_oat_data oat_data;
4832         struct qeth_qoat_priv priv;
4833         void __user *tmp;
4834
4835         QETH_CARD_TEXT(card, 3, "qoatcmd");
4836
4837         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT))
4838                 return -EOPNOTSUPP;
4839
4840         if (copy_from_user(&oat_data, udata, sizeof(oat_data)))
4841                 return -EFAULT;
4842
4843         priv.buffer_len = oat_data.buffer_len;
4844         priv.response_len = 0;
4845         priv.buffer = vzalloc(oat_data.buffer_len);
4846         if (!priv.buffer)
4847                 return -ENOMEM;
4848
4849         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4850                                    SETADP_DATA_SIZEOF(query_oat));
4851         if (!iob) {
4852                 rc = -ENOMEM;
4853                 goto out_free;
4854         }
4855         cmd = __ipa_cmd(iob);
4856         oat_req = &cmd->data.setadapterparms.data.query_oat;
4857         oat_req->subcmd_code = oat_data.command;
4858
4859         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb, &priv);
4860         if (!rc) {
4861                 tmp = is_compat_task() ? compat_ptr(oat_data.ptr) :
4862                                          u64_to_user_ptr(oat_data.ptr);
4863                 oat_data.response_len = priv.response_len;
4864
4865                 if (copy_to_user(tmp, priv.buffer, priv.response_len) ||
4866                     copy_to_user(udata, &oat_data, sizeof(oat_data)))
4867                         rc = -EFAULT;
4868         }
4869
4870 out_free:
4871         vfree(priv.buffer);
4872         return rc;
4873 }
4874
4875 static int qeth_query_card_info_cb(struct qeth_card *card,
4876                                    struct qeth_reply *reply, unsigned long data)
4877 {
4878         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4879         struct qeth_link_info *link_info = reply->param;
4880         struct qeth_query_card_info *card_info;
4881
4882         QETH_CARD_TEXT(card, 2, "qcrdincb");
4883         if (qeth_setadpparms_inspect_rc(cmd))
4884                 return -EIO;
4885
4886         card_info = &cmd->data.setadapterparms.data.card_info;
4887         netdev_dbg(card->dev,
4888                    "card info: card_type=0x%02x, port_mode=0x%04x, port_speed=0x%08x\n",
4889                    card_info->card_type, card_info->port_mode,
4890                    card_info->port_speed);
4891
4892         switch (card_info->port_mode) {
4893         case CARD_INFO_PORTM_FULLDUPLEX:
4894                 link_info->duplex = DUPLEX_FULL;
4895                 break;
4896         case CARD_INFO_PORTM_HALFDUPLEX:
4897                 link_info->duplex = DUPLEX_HALF;
4898                 break;
4899         default:
4900                 link_info->duplex = DUPLEX_UNKNOWN;
4901         }
4902
4903         switch (card_info->card_type) {
4904         case CARD_INFO_TYPE_1G_COPPER_A:
4905         case CARD_INFO_TYPE_1G_COPPER_B:
4906                 link_info->speed = SPEED_1000;
4907                 link_info->port = PORT_TP;
4908                 break;
4909         case CARD_INFO_TYPE_1G_FIBRE_A:
4910         case CARD_INFO_TYPE_1G_FIBRE_B:
4911                 link_info->speed = SPEED_1000;
4912                 link_info->port = PORT_FIBRE;
4913                 break;
4914         case CARD_INFO_TYPE_10G_FIBRE_A:
4915         case CARD_INFO_TYPE_10G_FIBRE_B:
4916                 link_info->speed = SPEED_10000;
4917                 link_info->port = PORT_FIBRE;
4918                 break;
4919         default:
4920                 switch (card_info->port_speed) {
4921                 case CARD_INFO_PORTS_10M:
4922                         link_info->speed = SPEED_10;
4923                         break;
4924                 case CARD_INFO_PORTS_100M:
4925                         link_info->speed = SPEED_100;
4926                         break;
4927                 case CARD_INFO_PORTS_1G:
4928                         link_info->speed = SPEED_1000;
4929                         break;
4930                 case CARD_INFO_PORTS_10G:
4931                         link_info->speed = SPEED_10000;
4932                         break;
4933                 case CARD_INFO_PORTS_25G:
4934                         link_info->speed = SPEED_25000;
4935                         break;
4936                 default:
4937                         link_info->speed = SPEED_UNKNOWN;
4938                 }
4939
4940                 link_info->port = PORT_OTHER;
4941         }
4942
4943         return 0;
4944 }
4945
4946 int qeth_query_card_info(struct qeth_card *card,
4947                          struct qeth_link_info *link_info)
4948 {
4949         struct qeth_cmd_buffer *iob;
4950
4951         QETH_CARD_TEXT(card, 2, "qcrdinfo");
4952         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_CARD_INFO))
4953                 return -EOPNOTSUPP;
4954         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_CARD_INFO, 0);
4955         if (!iob)
4956                 return -ENOMEM;
4957
4958         return qeth_send_ipa_cmd(card, iob, qeth_query_card_info_cb, link_info);
4959 }
4960
4961 static int qeth_init_link_info_oat_cb(struct qeth_card *card,
4962                                       struct qeth_reply *reply_priv,
4963                                       unsigned long data)
4964 {
4965         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4966         struct qeth_link_info *link_info = reply_priv->param;
4967         struct qeth_query_oat_physical_if *phys_if;
4968         struct qeth_query_oat_reply *reply;
4969
4970         if (qeth_setadpparms_inspect_rc(cmd))
4971                 return -EIO;
4972
4973         /* Multi-part reply is unexpected, don't bother: */
4974         if (cmd->data.setadapterparms.hdr.used_total > 1)
4975                 return -EINVAL;
4976
4977         /* Expect the reply to start with phys_if data: */
4978         reply = &cmd->data.setadapterparms.data.query_oat.reply[0];
4979         if (reply->type != QETH_QOAT_REPLY_TYPE_PHYS_IF ||
4980             reply->length < sizeof(*reply))
4981                 return -EINVAL;
4982
4983         phys_if = &reply->phys_if;
4984
4985         switch (phys_if->speed_duplex) {
4986         case QETH_QOAT_PHYS_SPEED_10M_HALF:
4987                 link_info->speed = SPEED_10;
4988                 link_info->duplex = DUPLEX_HALF;
4989                 break;
4990         case QETH_QOAT_PHYS_SPEED_10M_FULL:
4991                 link_info->speed = SPEED_10;
4992                 link_info->duplex = DUPLEX_FULL;
4993                 break;
4994         case QETH_QOAT_PHYS_SPEED_100M_HALF:
4995                 link_info->speed = SPEED_100;
4996                 link_info->duplex = DUPLEX_HALF;
4997                 break;
4998         case QETH_QOAT_PHYS_SPEED_100M_FULL:
4999                 link_info->speed = SPEED_100;
5000                 link_info->duplex = DUPLEX_FULL;
5001                 break;
5002         case QETH_QOAT_PHYS_SPEED_1000M_HALF:
5003                 link_info->speed = SPEED_1000;
5004                 link_info->duplex = DUPLEX_HALF;
5005                 break;
5006         case QETH_QOAT_PHYS_SPEED_1000M_FULL:
5007                 link_info->speed = SPEED_1000;
5008                 link_info->duplex = DUPLEX_FULL;
5009                 break;
5010         case QETH_QOAT_PHYS_SPEED_10G_FULL:
5011                 link_info->speed = SPEED_10000;
5012                 link_info->duplex = DUPLEX_FULL;
5013                 break;
5014         case QETH_QOAT_PHYS_SPEED_25G_FULL:
5015                 link_info->speed = SPEED_25000;
5016                 link_info->duplex = DUPLEX_FULL;
5017                 break;
5018         case QETH_QOAT_PHYS_SPEED_UNKNOWN:
5019         default:
5020                 link_info->speed = SPEED_UNKNOWN;
5021                 link_info->duplex = DUPLEX_UNKNOWN;
5022                 break;
5023         }
5024
5025         switch (phys_if->media_type) {
5026         case QETH_QOAT_PHYS_MEDIA_COPPER:
5027                 link_info->port = PORT_TP;
5028                 link_info->link_mode = QETH_LINK_MODE_UNKNOWN;
5029                 break;
5030         case QETH_QOAT_PHYS_MEDIA_FIBRE_SHORT:
5031                 link_info->port = PORT_FIBRE;
5032                 link_info->link_mode = QETH_LINK_MODE_FIBRE_SHORT;
5033                 break;
5034         case QETH_QOAT_PHYS_MEDIA_FIBRE_LONG:
5035                 link_info->port = PORT_FIBRE;
5036                 link_info->link_mode = QETH_LINK_MODE_FIBRE_LONG;
5037                 break;
5038         default:
5039                 link_info->port = PORT_OTHER;
5040                 link_info->link_mode = QETH_LINK_MODE_UNKNOWN;
5041                 break;
5042         }
5043
5044         return 0;
5045 }
5046
5047 static void qeth_init_link_info(struct qeth_card *card)
5048 {
5049         card->info.link_info.duplex = DUPLEX_FULL;
5050
5051         if (IS_IQD(card) || IS_VM_NIC(card)) {
5052                 card->info.link_info.speed = SPEED_10000;
5053                 card->info.link_info.port = PORT_FIBRE;
5054                 card->info.link_info.link_mode = QETH_LINK_MODE_FIBRE_SHORT;
5055         } else {
5056                 switch (card->info.link_type) {
5057                 case QETH_LINK_TYPE_FAST_ETH:
5058                 case QETH_LINK_TYPE_LANE_ETH100:
5059                         card->info.link_info.speed = SPEED_100;
5060                         card->info.link_info.port = PORT_TP;
5061                         break;
5062                 case QETH_LINK_TYPE_GBIT_ETH:
5063                 case QETH_LINK_TYPE_LANE_ETH1000:
5064                         card->info.link_info.speed = SPEED_1000;
5065                         card->info.link_info.port = PORT_FIBRE;
5066                         break;
5067                 case QETH_LINK_TYPE_10GBIT_ETH:
5068                         card->info.link_info.speed = SPEED_10000;
5069                         card->info.link_info.port = PORT_FIBRE;
5070                         break;
5071                 case QETH_LINK_TYPE_25GBIT_ETH:
5072                         card->info.link_info.speed = SPEED_25000;
5073                         card->info.link_info.port = PORT_FIBRE;
5074                         break;
5075                 default:
5076                         dev_info(&card->gdev->dev, "Unknown link type %x\n",
5077                                  card->info.link_type);
5078                         card->info.link_info.speed = SPEED_UNKNOWN;
5079                         card->info.link_info.port = PORT_OTHER;
5080                 }
5081
5082                 card->info.link_info.link_mode = QETH_LINK_MODE_UNKNOWN;
5083         }
5084
5085         /* Get more accurate data via QUERY OAT: */
5086         if (qeth_adp_supported(card, IPA_SETADP_QUERY_OAT)) {
5087                 struct qeth_link_info link_info;
5088                 struct qeth_cmd_buffer *iob;
5089
5090                 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
5091                                            SETADP_DATA_SIZEOF(query_oat));
5092                 if (iob) {
5093                         struct qeth_ipa_cmd *cmd = __ipa_cmd(iob);
5094                         struct qeth_query_oat *oat_req;
5095
5096                         oat_req = &cmd->data.setadapterparms.data.query_oat;
5097                         oat_req->subcmd_code = QETH_QOAT_SCOPE_INTERFACE;
5098
5099                         if (!qeth_send_ipa_cmd(card, iob,
5100                                                qeth_init_link_info_oat_cb,
5101                                                &link_info)) {
5102                                 if (link_info.speed != SPEED_UNKNOWN)
5103                                         card->info.link_info.speed = link_info.speed;
5104                                 if (link_info.duplex != DUPLEX_UNKNOWN)
5105                                         card->info.link_info.duplex = link_info.duplex;
5106                                 if (link_info.port != PORT_OTHER)
5107                                         card->info.link_info.port = link_info.port;
5108                                 if (link_info.link_mode != QETH_LINK_MODE_UNKNOWN)
5109                                         card->info.link_info.link_mode = link_info.link_mode;
5110                         }
5111                 }
5112         }
5113 }
5114
5115 /**
5116  * qeth_vm_request_mac() - Request a hypervisor-managed MAC address
5117  * @card: pointer to a qeth_card
5118  *
5119  * Returns
5120  *      0, if a MAC address has been set for the card's netdevice
5121  *      a return code, for various error conditions
5122  */
5123 int qeth_vm_request_mac(struct qeth_card *card)
5124 {
5125         struct diag26c_mac_resp *response;
5126         struct diag26c_mac_req *request;
5127         int rc;
5128
5129         QETH_CARD_TEXT(card, 2, "vmreqmac");
5130
5131         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
5132         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
5133         if (!request || !response) {
5134                 rc = -ENOMEM;
5135                 goto out;
5136         }
5137
5138         request->resp_buf_len = sizeof(*response);
5139         request->resp_version = DIAG26C_VERSION2;
5140         request->op_code = DIAG26C_GET_MAC;
5141         request->devno = card->info.ddev_devno;
5142
5143         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
5144         rc = diag26c(request, response, DIAG26C_MAC_SERVICES);
5145         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
5146         if (rc)
5147                 goto out;
5148         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
5149
5150         if (request->resp_buf_len < sizeof(*response) ||
5151             response->version != request->resp_version) {
5152                 rc = -EIO;
5153                 QETH_CARD_TEXT(card, 2, "badresp");
5154                 QETH_CARD_HEX(card, 2, &request->resp_buf_len,
5155                               sizeof(request->resp_buf_len));
5156         } else if (!is_valid_ether_addr(response->mac)) {
5157                 rc = -EINVAL;
5158                 QETH_CARD_TEXT(card, 2, "badmac");
5159                 QETH_CARD_HEX(card, 2, response->mac, ETH_ALEN);
5160         } else {
5161                 ether_addr_copy(card->dev->dev_addr, response->mac);
5162         }
5163
5164 out:
5165         kfree(response);
5166         kfree(request);
5167         return rc;
5168 }
5169 EXPORT_SYMBOL_GPL(qeth_vm_request_mac);
5170
5171 static void qeth_determine_capabilities(struct qeth_card *card)
5172 {
5173         struct qeth_channel *channel = &card->data;
5174         struct ccw_device *ddev = channel->ccwdev;
5175         int rc;
5176         int ddev_offline = 0;
5177
5178         QETH_CARD_TEXT(card, 2, "detcapab");
5179         if (!ddev->online) {
5180                 ddev_offline = 1;
5181                 rc = qeth_start_channel(channel);
5182                 if (rc) {
5183                         QETH_CARD_TEXT_(card, 2, "3err%d", rc);
5184                         goto out;
5185                 }
5186         }
5187
5188         rc = qeth_read_conf_data(card);
5189         if (rc) {
5190                 QETH_DBF_MESSAGE(2, "qeth_read_conf_data on device %x returned %i\n",
5191                                  CARD_DEVID(card), rc);
5192                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
5193                 goto out_offline;
5194         }
5195
5196         rc = qdio_get_ssqd_desc(ddev, &card->ssqd);
5197         if (rc)
5198                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
5199
5200         QETH_CARD_TEXT_(card, 2, "qfmt%d", card->ssqd.qfmt);
5201         QETH_CARD_TEXT_(card, 2, "ac1:%02x", card->ssqd.qdioac1);
5202         QETH_CARD_TEXT_(card, 2, "ac2:%04x", card->ssqd.qdioac2);
5203         QETH_CARD_TEXT_(card, 2, "ac3:%04x", card->ssqd.qdioac3);
5204         QETH_CARD_TEXT_(card, 2, "icnt%d", card->ssqd.icnt);
5205         if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) ||
5206             ((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) ||
5207             ((card->ssqd.qdioac3 & CHSC_AC3_FORMAT2_CQ_AVAILABLE) == 0))) {
5208                 dev_info(&card->gdev->dev,
5209                         "Completion Queueing supported\n");
5210         } else {
5211                 card->options.cq = QETH_CQ_NOTAVAILABLE;
5212         }
5213
5214 out_offline:
5215         if (ddev_offline == 1)
5216                 qeth_stop_channel(channel);
5217 out:
5218         return;
5219 }
5220
5221 static void qeth_read_ccw_conf_data(struct qeth_card *card)
5222 {
5223         struct qeth_card_info *info = &card->info;
5224         struct ccw_device *cdev = CARD_DDEV(card);
5225         struct ccw_dev_id dev_id;
5226
5227         QETH_CARD_TEXT(card, 2, "ccwconfd");
5228         ccw_device_get_id(cdev, &dev_id);
5229
5230         info->ddev_devno = dev_id.devno;
5231         info->ids_valid = !ccw_device_get_cssid(cdev, &info->cssid) &&
5232                           !ccw_device_get_iid(cdev, &info->iid) &&
5233                           !ccw_device_get_chid(cdev, 0, &info->chid);
5234         info->ssid = dev_id.ssid;
5235
5236         dev_info(&card->gdev->dev, "CHID: %x CHPID: %x\n",
5237                  info->chid, info->chpid);
5238
5239         QETH_CARD_TEXT_(card, 3, "devn%x", info->ddev_devno);
5240         QETH_CARD_TEXT_(card, 3, "cssid:%x", info->cssid);
5241         QETH_CARD_TEXT_(card, 3, "iid:%x", info->iid);
5242         QETH_CARD_TEXT_(card, 3, "ssid:%x", info->ssid);
5243         QETH_CARD_TEXT_(card, 3, "chpid:%x", info->chpid);
5244         QETH_CARD_TEXT_(card, 3, "chid:%x", info->chid);
5245         QETH_CARD_TEXT_(card, 3, "idval%x", info->ids_valid);
5246 }
5247
5248 static int qeth_qdio_establish(struct qeth_card *card)
5249 {
5250         struct qdio_buffer **out_sbal_ptrs[QETH_MAX_OUT_QUEUES];
5251         struct qdio_buffer **in_sbal_ptrs[QETH_MAX_IN_QUEUES];
5252         struct qeth_qib_parms *qib_parms = NULL;
5253         struct qdio_initialize init_data;
5254         unsigned int i;
5255         int rc = 0;
5256
5257         QETH_CARD_TEXT(card, 2, "qdioest");
5258
5259         if (!IS_IQD(card) && !IS_VM_NIC(card)) {
5260                 qib_parms = kzalloc(sizeof_field(struct qib, parm), GFP_KERNEL);
5261                 if (!qib_parms)
5262                         return -ENOMEM;
5263
5264                 qeth_fill_qib_parms(card, qib_parms);
5265         }
5266
5267         in_sbal_ptrs[0] = card->qdio.in_q->qdio_bufs;
5268         if (card->options.cq == QETH_CQ_ENABLED)
5269                 in_sbal_ptrs[1] = card->qdio.c_q->qdio_bufs;
5270
5271         for (i = 0; i < card->qdio.no_out_queues; i++)
5272                 out_sbal_ptrs[i] = card->qdio.out_qs[i]->qdio_bufs;
5273
5274         memset(&init_data, 0, sizeof(struct qdio_initialize));
5275         init_data.q_format               = IS_IQD(card) ? QDIO_IQDIO_QFMT :
5276                                                           QDIO_QETH_QFMT;
5277         init_data.qib_param_field_format = 0;
5278         init_data.qib_param_field        = (void *)qib_parms;
5279         init_data.no_input_qs            = card->qdio.no_in_queues;
5280         init_data.no_output_qs           = card->qdio.no_out_queues;
5281         init_data.input_handler          = qeth_qdio_input_handler;
5282         init_data.output_handler         = qeth_qdio_output_handler;
5283         init_data.irq_poll               = qeth_qdio_poll;
5284         init_data.int_parm               = (unsigned long) card;
5285         init_data.input_sbal_addr_array  = in_sbal_ptrs;
5286         init_data.output_sbal_addr_array = out_sbal_ptrs;
5287         init_data.output_sbal_state_array = card->qdio.out_bufstates;
5288         init_data.scan_threshold         = IS_IQD(card) ? 0 : 32;
5289
5290         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED,
5291                 QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) {
5292                 rc = qdio_allocate(CARD_DDEV(card), init_data.no_input_qs,
5293                                    init_data.no_output_qs);
5294                 if (rc) {
5295                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5296                         goto out;
5297                 }
5298                 rc = qdio_establish(CARD_DDEV(card), &init_data);
5299                 if (rc) {
5300                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5301                         qdio_free(CARD_DDEV(card));
5302                 }
5303         }
5304
5305         switch (card->options.cq) {
5306         case QETH_CQ_ENABLED:
5307                 dev_info(&card->gdev->dev, "Completion Queue support enabled");
5308                 break;
5309         case QETH_CQ_DISABLED:
5310                 dev_info(&card->gdev->dev, "Completion Queue support disabled");
5311                 break;
5312         default:
5313                 break;
5314         }
5315
5316 out:
5317         kfree(qib_parms);
5318         return rc;
5319 }
5320
5321 static void qeth_core_free_card(struct qeth_card *card)
5322 {
5323         QETH_CARD_TEXT(card, 2, "freecrd");
5324
5325         unregister_service_level(&card->qeth_service_level);
5326         debugfs_remove_recursive(card->debugfs);
5327         qeth_put_cmd(card->read_cmd);
5328         destroy_workqueue(card->event_wq);
5329         dev_set_drvdata(&card->gdev->dev, NULL);
5330         kfree(card);
5331 }
5332
5333 static void qeth_trace_features(struct qeth_card *card)
5334 {
5335         QETH_CARD_TEXT(card, 2, "features");
5336         QETH_CARD_HEX(card, 2, &card->options.ipa4, sizeof(card->options.ipa4));
5337         QETH_CARD_HEX(card, 2, &card->options.ipa6, sizeof(card->options.ipa6));
5338         QETH_CARD_HEX(card, 2, &card->options.adp, sizeof(card->options.adp));
5339         QETH_CARD_HEX(card, 2, &card->info.diagass_support,
5340                       sizeof(card->info.diagass_support));
5341 }
5342
5343 static struct ccw_device_id qeth_ids[] = {
5344         {CCW_DEVICE_DEVTYPE(0x1731, 0x01, 0x1732, 0x01),
5345                                         .driver_info = QETH_CARD_TYPE_OSD},
5346         {CCW_DEVICE_DEVTYPE(0x1731, 0x05, 0x1732, 0x05),
5347                                         .driver_info = QETH_CARD_TYPE_IQD},
5348 #ifdef CONFIG_QETH_OSN
5349         {CCW_DEVICE_DEVTYPE(0x1731, 0x06, 0x1732, 0x06),
5350                                         .driver_info = QETH_CARD_TYPE_OSN},
5351 #endif
5352         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x03),
5353                                         .driver_info = QETH_CARD_TYPE_OSM},
5354 #ifdef CONFIG_QETH_OSX
5355         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x02),
5356                                         .driver_info = QETH_CARD_TYPE_OSX},
5357 #endif
5358         {},
5359 };
5360 MODULE_DEVICE_TABLE(ccw, qeth_ids);
5361
5362 static struct ccw_driver qeth_ccw_driver = {
5363         .driver = {
5364                 .owner = THIS_MODULE,
5365                 .name = "qeth",
5366         },
5367         .ids = qeth_ids,
5368         .probe = ccwgroup_probe_ccwdev,
5369         .remove = ccwgroup_remove_ccwdev,
5370 };
5371
5372 static int qeth_hardsetup_card(struct qeth_card *card, bool *carrier_ok)
5373 {
5374         int retries = 3;
5375         int rc;
5376
5377         QETH_CARD_TEXT(card, 2, "hrdsetup");
5378         atomic_set(&card->force_alloc_skb, 0);
5379         rc = qeth_update_from_chp_desc(card);
5380         if (rc)
5381                 return rc;
5382 retry:
5383         if (retries < 3)
5384                 QETH_DBF_MESSAGE(2, "Retrying to do IDX activates on device %x.\n",
5385                                  CARD_DEVID(card));
5386         rc = qeth_qdio_clear_card(card, !IS_IQD(card));
5387         qeth_stop_channel(&card->data);
5388         qeth_stop_channel(&card->write);
5389         qeth_stop_channel(&card->read);
5390         qdio_free(CARD_DDEV(card));
5391
5392         rc = qeth_start_channel(&card->read);
5393         if (rc)
5394                 goto retriable;
5395         rc = qeth_start_channel(&card->write);
5396         if (rc)
5397                 goto retriable;
5398         rc = qeth_start_channel(&card->data);
5399         if (rc)
5400                 goto retriable;
5401 retriable:
5402         if (rc == -ERESTARTSYS) {
5403                 QETH_CARD_TEXT(card, 2, "break1");
5404                 return rc;
5405         } else if (rc) {
5406                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
5407                 if (--retries < 0)
5408                         goto out;
5409                 else
5410                         goto retry;
5411         }
5412
5413         qeth_determine_capabilities(card);
5414         qeth_read_ccw_conf_data(card);
5415         qeth_idx_init(card);
5416
5417         rc = qeth_idx_activate_read_channel(card);
5418         if (rc == -EINTR) {
5419                 QETH_CARD_TEXT(card, 2, "break2");
5420                 return rc;
5421         } else if (rc) {
5422                 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
5423                 if (--retries < 0)
5424                         goto out;
5425                 else
5426                         goto retry;
5427         }
5428
5429         rc = qeth_idx_activate_write_channel(card);
5430         if (rc == -EINTR) {
5431                 QETH_CARD_TEXT(card, 2, "break3");
5432                 return rc;
5433         } else if (rc) {
5434                 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
5435                 if (--retries < 0)
5436                         goto out;
5437                 else
5438                         goto retry;
5439         }
5440         card->read_or_write_problem = 0;
5441         rc = qeth_mpc_initialize(card);
5442         if (rc) {
5443                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
5444                 goto out;
5445         }
5446
5447         rc = qeth_send_startlan(card);
5448         if (rc) {
5449                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
5450                 if (rc == -ENETDOWN) {
5451                         dev_warn(&card->gdev->dev, "The LAN is offline\n");
5452                         *carrier_ok = false;
5453                 } else {
5454                         goto out;
5455                 }
5456         } else {
5457                 *carrier_ok = true;
5458         }
5459
5460         card->options.ipa4.supported = 0;
5461         card->options.ipa6.supported = 0;
5462         card->options.adp.supported = 0;
5463         card->options.sbp.supported_funcs = 0;
5464         card->info.diagass_support = 0;
5465         rc = qeth_query_ipassists(card, QETH_PROT_IPV4);
5466         if (rc == -ENOMEM)
5467                 goto out;
5468         if (qeth_is_supported(card, IPA_IPV6)) {
5469                 rc = qeth_query_ipassists(card, QETH_PROT_IPV6);
5470                 if (rc == -ENOMEM)
5471                         goto out;
5472         }
5473         if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
5474                 rc = qeth_query_setadapterparms(card);
5475                 if (rc < 0) {
5476                         QETH_CARD_TEXT_(card, 2, "7err%d", rc);
5477                         goto out;
5478                 }
5479         }
5480         if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
5481                 rc = qeth_query_setdiagass(card);
5482                 if (rc)
5483                         QETH_CARD_TEXT_(card, 2, "8err%d", rc);
5484         }
5485
5486         qeth_trace_features(card);
5487
5488         if (!qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP) ||
5489             (card->info.hwtrap && qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM)))
5490                 card->info.hwtrap = 0;
5491
5492         if (card->options.isolation != ISOLATION_MODE_NONE) {
5493                 rc = qeth_setadpparms_set_access_ctrl(card,
5494                                                       card->options.isolation);
5495                 if (rc)
5496                         goto out;
5497         }
5498
5499         qeth_init_link_info(card);
5500
5501         rc = qeth_init_qdio_queues(card);
5502         if (rc) {
5503                 QETH_CARD_TEXT_(card, 2, "9err%d", rc);
5504                 goto out;
5505         }
5506
5507         return 0;
5508 out:
5509         dev_warn(&card->gdev->dev, "The qeth device driver failed to recover "
5510                 "an error on the device\n");
5511         QETH_DBF_MESSAGE(2, "Initialization for device %x failed in hardsetup! rc=%d\n",
5512                          CARD_DEVID(card), rc);
5513         return rc;
5514 }
5515
5516 static int qeth_set_online(struct qeth_card *card,
5517                            const struct qeth_discipline *disc)
5518 {
5519         bool carrier_ok;
5520         int rc;
5521
5522         mutex_lock(&card->conf_mutex);
5523         QETH_CARD_TEXT(card, 2, "setonlin");
5524
5525         rc = qeth_hardsetup_card(card, &carrier_ok);
5526         if (rc) {
5527                 QETH_CARD_TEXT_(card, 2, "2err%04x", rc);
5528                 rc = -ENODEV;
5529                 goto err_hardsetup;
5530         }
5531
5532         qeth_print_status_message(card);
5533
5534         if (card->dev->reg_state != NETREG_REGISTERED)
5535                 /* no need for locking / error handling at this early stage: */
5536                 qeth_set_real_num_tx_queues(card, qeth_tx_actual_queues(card));
5537
5538         rc = disc->set_online(card, carrier_ok);
5539         if (rc)
5540                 goto err_online;
5541
5542         /* let user_space know that device is online */
5543         kobject_uevent(&card->gdev->dev.kobj, KOBJ_CHANGE);
5544
5545         mutex_unlock(&card->conf_mutex);
5546         return 0;
5547
5548 err_online:
5549 err_hardsetup:
5550         qeth_qdio_clear_card(card, 0);
5551         qeth_clear_working_pool_list(card);
5552         qeth_flush_local_addrs(card);
5553
5554         qeth_stop_channel(&card->data);
5555         qeth_stop_channel(&card->write);
5556         qeth_stop_channel(&card->read);
5557         qdio_free(CARD_DDEV(card));
5558
5559         mutex_unlock(&card->conf_mutex);
5560         return rc;
5561 }
5562
5563 int qeth_set_offline(struct qeth_card *card, const struct qeth_discipline *disc,
5564                      bool resetting)
5565 {
5566         int rc, rc2, rc3;
5567
5568         mutex_lock(&card->conf_mutex);
5569         QETH_CARD_TEXT(card, 3, "setoffl");
5570
5571         if ((!resetting && card->info.hwtrap) || card->info.hwtrap == 2) {
5572                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
5573                 card->info.hwtrap = 1;
5574         }
5575
5576         /* cancel any stalled cmd that might block the rtnl: */
5577         qeth_clear_ipacmd_list(card);
5578
5579         rtnl_lock();
5580         card->info.open_when_online = card->dev->flags & IFF_UP;
5581         dev_close(card->dev);
5582         netif_device_detach(card->dev);
5583         netif_carrier_off(card->dev);
5584         rtnl_unlock();
5585
5586         cancel_work_sync(&card->rx_mode_work);
5587
5588         disc->set_offline(card);
5589
5590         qeth_qdio_clear_card(card, 0);
5591         qeth_drain_output_queues(card);
5592         qeth_clear_working_pool_list(card);
5593         qeth_flush_local_addrs(card);
5594         card->info.promisc_mode = 0;
5595
5596         rc  = qeth_stop_channel(&card->data);
5597         rc2 = qeth_stop_channel(&card->write);
5598         rc3 = qeth_stop_channel(&card->read);
5599         if (!rc)
5600                 rc = (rc2) ? rc2 : rc3;
5601         if (rc)
5602                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
5603         qdio_free(CARD_DDEV(card));
5604
5605         /* let user_space know that device is offline */
5606         kobject_uevent(&card->gdev->dev.kobj, KOBJ_CHANGE);
5607
5608         mutex_unlock(&card->conf_mutex);
5609         return 0;
5610 }
5611 EXPORT_SYMBOL_GPL(qeth_set_offline);
5612
5613 static int qeth_do_reset(void *data)
5614 {
5615         const struct qeth_discipline *disc;
5616         struct qeth_card *card = data;
5617         int rc;
5618
5619         /* Lock-free, other users will block until we are done. */
5620         disc = card->discipline;
5621
5622         QETH_CARD_TEXT(card, 2, "recover1");
5623         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
5624                 return 0;
5625         QETH_CARD_TEXT(card, 2, "recover2");
5626         dev_warn(&card->gdev->dev,
5627                  "A recovery process has been started for the device\n");
5628
5629         qeth_set_offline(card, disc, true);
5630         rc = qeth_set_online(card, disc);
5631         if (!rc) {
5632                 dev_info(&card->gdev->dev,
5633                          "Device successfully recovered!\n");
5634         } else {
5635                 ccwgroup_set_offline(card->gdev);
5636                 dev_warn(&card->gdev->dev,
5637                          "The qeth device driver failed to recover an error on the device\n");
5638         }
5639         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
5640         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
5641         return 0;
5642 }
5643
5644 #if IS_ENABLED(CONFIG_QETH_L3)
5645 static void qeth_l3_rebuild_skb(struct qeth_card *card, struct sk_buff *skb,
5646                                 struct qeth_hdr *hdr)
5647 {
5648         struct af_iucv_trans_hdr *iucv = (struct af_iucv_trans_hdr *) skb->data;
5649         struct qeth_hdr_layer3 *l3_hdr = &hdr->hdr.l3;
5650         struct net_device *dev = skb->dev;
5651
5652         if (IS_IQD(card) && iucv->magic == ETH_P_AF_IUCV) {
5653                 dev_hard_header(skb, dev, ETH_P_AF_IUCV, dev->dev_addr,
5654                                 "FAKELL", skb->len);
5655                 return;
5656         }
5657
5658         if (!(l3_hdr->flags & QETH_HDR_PASSTHRU)) {
5659                 u16 prot = (l3_hdr->flags & QETH_HDR_IPV6) ? ETH_P_IPV6 :
5660                                                              ETH_P_IP;
5661                 unsigned char tg_addr[ETH_ALEN];
5662
5663                 skb_reset_network_header(skb);
5664                 switch (l3_hdr->flags & QETH_HDR_CAST_MASK) {
5665                 case QETH_CAST_MULTICAST:
5666                         if (prot == ETH_P_IP)
5667                                 ip_eth_mc_map(ip_hdr(skb)->daddr, tg_addr);
5668                         else
5669                                 ipv6_eth_mc_map(&ipv6_hdr(skb)->daddr, tg_addr);
5670                         QETH_CARD_STAT_INC(card, rx_multicast);
5671                         break;
5672                 case QETH_CAST_BROADCAST:
5673                         ether_addr_copy(tg_addr, dev->broadcast);
5674                         QETH_CARD_STAT_INC(card, rx_multicast);
5675                         break;
5676                 default:
5677                         if (card->options.sniffer)
5678                                 skb->pkt_type = PACKET_OTHERHOST;
5679                         ether_addr_copy(tg_addr, dev->dev_addr);
5680                 }
5681
5682                 if (l3_hdr->ext_flags & QETH_HDR_EXT_SRC_MAC_ADDR)
5683                         dev_hard_header(skb, dev, prot, tg_addr,
5684                                         &l3_hdr->next_hop.rx.src_mac, skb->len);
5685                 else
5686                         dev_hard_header(skb, dev, prot, tg_addr, "FAKELL",
5687                                         skb->len);
5688         }
5689
5690         /* copy VLAN tag from hdr into skb */
5691         if (!card->options.sniffer &&
5692             (l3_hdr->ext_flags & (QETH_HDR_EXT_VLAN_FRAME |
5693                                   QETH_HDR_EXT_INCLUDE_VLAN_TAG))) {
5694                 u16 tag = (l3_hdr->ext_flags & QETH_HDR_EXT_VLAN_FRAME) ?
5695                                 l3_hdr->vlan_id :
5696                                 l3_hdr->next_hop.rx.vlan_id;
5697
5698                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag);
5699         }
5700 }
5701 #endif
5702
5703 static void qeth_receive_skb(struct qeth_card *card, struct sk_buff *skb,
5704                              struct qeth_hdr *hdr, bool uses_frags)
5705 {
5706         struct napi_struct *napi = &card->napi;
5707         bool is_cso;
5708
5709         switch (hdr->hdr.l2.id) {
5710         case QETH_HEADER_TYPE_OSN:
5711                 skb_push(skb, sizeof(*hdr));
5712                 skb_copy_to_linear_data(skb, hdr, sizeof(*hdr));
5713                 QETH_CARD_STAT_ADD(card, rx_bytes, skb->len);
5714                 QETH_CARD_STAT_INC(card, rx_packets);
5715
5716                 card->osn_info.data_cb(skb);
5717                 return;
5718 #if IS_ENABLED(CONFIG_QETH_L3)
5719         case QETH_HEADER_TYPE_LAYER3:
5720                 qeth_l3_rebuild_skb(card, skb, hdr);
5721                 is_cso = hdr->hdr.l3.ext_flags & QETH_HDR_EXT_CSUM_TRANSP_REQ;
5722                 break;
5723 #endif
5724         case QETH_HEADER_TYPE_LAYER2:
5725                 is_cso = hdr->hdr.l2.flags[1] & QETH_HDR_EXT_CSUM_TRANSP_REQ;
5726                 break;
5727         default:
5728                 /* never happens */
5729                 if (uses_frags)
5730                         napi_free_frags(napi);
5731                 else
5732                         dev_kfree_skb_any(skb);
5733                 return;
5734         }
5735
5736         if (is_cso && (card->dev->features & NETIF_F_RXCSUM)) {
5737                 skb->ip_summed = CHECKSUM_UNNECESSARY;
5738                 QETH_CARD_STAT_INC(card, rx_skb_csum);
5739         } else {
5740                 skb->ip_summed = CHECKSUM_NONE;
5741         }
5742
5743         QETH_CARD_STAT_ADD(card, rx_bytes, skb->len);
5744         QETH_CARD_STAT_INC(card, rx_packets);
5745         if (skb_is_nonlinear(skb)) {
5746                 QETH_CARD_STAT_INC(card, rx_sg_skbs);
5747                 QETH_CARD_STAT_ADD(card, rx_sg_frags,
5748                                    skb_shinfo(skb)->nr_frags);
5749         }
5750
5751         if (uses_frags) {
5752                 napi_gro_frags(napi);
5753         } else {
5754                 skb->protocol = eth_type_trans(skb, skb->dev);
5755                 napi_gro_receive(napi, skb);
5756         }
5757 }
5758
5759 static void qeth_create_skb_frag(struct sk_buff *skb, char *data, int data_len)
5760 {
5761         struct page *page = virt_to_page(data);
5762         unsigned int next_frag;
5763
5764         next_frag = skb_shinfo(skb)->nr_frags;
5765         get_page(page);
5766         skb_add_rx_frag(skb, next_frag, page, offset_in_page(data), data_len,
5767                         data_len);
5768 }
5769
5770 static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale)
5771 {
5772         return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY);
5773 }
5774
5775 static int qeth_extract_skb(struct qeth_card *card,
5776                             struct qeth_qdio_buffer *qethbuffer, u8 *element_no,
5777                             int *__offset)
5778 {
5779         struct qeth_priv *priv = netdev_priv(card->dev);
5780         struct qdio_buffer *buffer = qethbuffer->buffer;
5781         struct napi_struct *napi = &card->napi;
5782         struct qdio_buffer_element *element;
5783         unsigned int linear_len = 0;
5784         bool uses_frags = false;
5785         int offset = *__offset;
5786         bool use_rx_sg = false;
5787         unsigned int headroom;
5788         struct qeth_hdr *hdr;
5789         struct sk_buff *skb;
5790         int skb_len = 0;
5791
5792         element = &buffer->element[*element_no];
5793
5794 next_packet:
5795         /* qeth_hdr must not cross element boundaries */
5796         while (element->length < offset + sizeof(struct qeth_hdr)) {
5797                 if (qeth_is_last_sbale(element))
5798                         return -ENODATA;
5799                 element++;
5800                 offset = 0;
5801         }
5802
5803         hdr = phys_to_virt(element->addr) + offset;
5804         offset += sizeof(*hdr);
5805         skb = NULL;
5806
5807         switch (hdr->hdr.l2.id) {
5808         case QETH_HEADER_TYPE_LAYER2:
5809                 skb_len = hdr->hdr.l2.pkt_length;
5810                 linear_len = ETH_HLEN;
5811                 headroom = 0;
5812                 break;
5813         case QETH_HEADER_TYPE_LAYER3:
5814                 skb_len = hdr->hdr.l3.length;
5815                 if (!IS_LAYER3(card)) {
5816                         QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5817                         goto walk_packet;
5818                 }
5819
5820                 if (hdr->hdr.l3.flags & QETH_HDR_PASSTHRU) {
5821                         linear_len = ETH_HLEN;
5822                         headroom = 0;
5823                         break;
5824                 }
5825
5826                 if (hdr->hdr.l3.flags & QETH_HDR_IPV6)
5827                         linear_len = sizeof(struct ipv6hdr);
5828                 else
5829                         linear_len = sizeof(struct iphdr);
5830                 headroom = ETH_HLEN;
5831                 break;
5832         case QETH_HEADER_TYPE_OSN:
5833                 skb_len = hdr->hdr.osn.pdu_length;
5834                 if (!IS_OSN(card)) {
5835                         QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5836                         goto walk_packet;
5837                 }
5838
5839                 linear_len = skb_len;
5840                 headroom = sizeof(struct qeth_hdr);
5841                 break;
5842         default:
5843                 if (hdr->hdr.l2.id & QETH_HEADER_MASK_INVAL)
5844                         QETH_CARD_STAT_INC(card, rx_frame_errors);
5845                 else
5846                         QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5847
5848                 /* Can't determine packet length, drop the whole buffer. */
5849                 return -EPROTONOSUPPORT;
5850         }
5851
5852         if (skb_len < linear_len) {
5853                 QETH_CARD_STAT_INC(card, rx_dropped_runt);
5854                 goto walk_packet;
5855         }
5856
5857         use_rx_sg = (card->options.cq == QETH_CQ_ENABLED) ||
5858                     (skb_len > READ_ONCE(priv->rx_copybreak) &&
5859                      !atomic_read(&card->force_alloc_skb) &&
5860                      !IS_OSN(card));
5861
5862         if (use_rx_sg) {
5863                 /* QETH_CQ_ENABLED only: */
5864                 if (qethbuffer->rx_skb &&
5865                     skb_tailroom(qethbuffer->rx_skb) >= linear_len + headroom) {
5866                         skb = qethbuffer->rx_skb;
5867                         qethbuffer->rx_skb = NULL;
5868                         goto use_skb;
5869                 }
5870
5871                 skb = napi_get_frags(napi);
5872                 if (!skb) {
5873                         /* -ENOMEM, no point in falling back further. */
5874                         QETH_CARD_STAT_INC(card, rx_dropped_nomem);
5875                         goto walk_packet;
5876                 }
5877
5878                 if (skb_tailroom(skb) >= linear_len + headroom) {
5879                         uses_frags = true;
5880                         goto use_skb;
5881                 }
5882
5883                 netdev_info_once(card->dev,
5884                                  "Insufficient linear space in NAPI frags skb, need %u but have %u\n",
5885                                  linear_len + headroom, skb_tailroom(skb));
5886                 /* Shouldn't happen. Don't optimize, fall back to linear skb. */
5887         }
5888
5889         linear_len = skb_len;
5890         skb = napi_alloc_skb(napi, linear_len + headroom);
5891         if (!skb) {
5892                 QETH_CARD_STAT_INC(card, rx_dropped_nomem);
5893                 goto walk_packet;
5894         }
5895
5896 use_skb:
5897         if (headroom)
5898                 skb_reserve(skb, headroom);
5899 walk_packet:
5900         while (skb_len) {
5901                 int data_len = min(skb_len, (int)(element->length - offset));
5902                 char *data = phys_to_virt(element->addr) + offset;
5903
5904                 skb_len -= data_len;
5905                 offset += data_len;
5906
5907                 /* Extract data from current element: */
5908                 if (skb && data_len) {
5909                         if (linear_len) {
5910                                 unsigned int copy_len;
5911
5912                                 copy_len = min_t(unsigned int, linear_len,
5913                                                  data_len);
5914
5915                                 skb_put_data(skb, data, copy_len);
5916                                 linear_len -= copy_len;
5917                                 data_len -= copy_len;
5918                                 data += copy_len;
5919                         }
5920
5921                         if (data_len)
5922                                 qeth_create_skb_frag(skb, data, data_len);
5923                 }
5924
5925                 /* Step forward to next element: */
5926                 if (skb_len) {
5927                         if (qeth_is_last_sbale(element)) {
5928                                 QETH_CARD_TEXT(card, 4, "unexeob");
5929                                 QETH_CARD_HEX(card, 2, buffer, sizeof(void *));
5930                                 if (skb) {
5931                                         if (uses_frags)
5932                                                 napi_free_frags(napi);
5933                                         else
5934                                                 dev_kfree_skb_any(skb);
5935                                         QETH_CARD_STAT_INC(card,
5936                                                            rx_length_errors);
5937                                 }
5938                                 return -EMSGSIZE;
5939                         }
5940                         element++;
5941                         offset = 0;
5942                 }
5943         }
5944
5945         /* This packet was skipped, go get another one: */
5946         if (!skb)
5947                 goto next_packet;
5948
5949         *element_no = element - &buffer->element[0];
5950         *__offset = offset;
5951
5952         qeth_receive_skb(card, skb, hdr, uses_frags);
5953         return 0;
5954 }
5955
5956 static unsigned int qeth_extract_skbs(struct qeth_card *card, int budget,
5957                                       struct qeth_qdio_buffer *buf, bool *done)
5958 {
5959         unsigned int work_done = 0;
5960
5961         while (budget) {
5962                 if (qeth_extract_skb(card, buf, &card->rx.buf_element,
5963                                      &card->rx.e_offset)) {
5964                         *done = true;
5965                         break;
5966                 }
5967
5968                 work_done++;
5969                 budget--;
5970         }
5971
5972         return work_done;
5973 }
5974
5975 static unsigned int qeth_rx_poll(struct qeth_card *card, int budget)
5976 {
5977         struct qeth_rx *ctx = &card->rx;
5978         unsigned int work_done = 0;
5979
5980         while (budget > 0) {
5981                 struct qeth_qdio_buffer *buffer;
5982                 unsigned int skbs_done = 0;
5983                 bool done = false;
5984
5985                 /* Fetch completed RX buffers: */
5986                 if (!card->rx.b_count) {
5987                         card->rx.qdio_err = 0;
5988                         card->rx.b_count = qdio_get_next_buffers(
5989                                 card->data.ccwdev, 0, &card->rx.b_index,
5990                                 &card->rx.qdio_err);
5991                         if (card->rx.b_count <= 0) {
5992                                 card->rx.b_count = 0;
5993                                 break;
5994                         }
5995                 }
5996
5997                 /* Process one completed RX buffer: */
5998                 buffer = &card->qdio.in_q->bufs[card->rx.b_index];
5999                 if (!(card->rx.qdio_err &&
6000                       qeth_check_qdio_errors(card, buffer->buffer,
6001                                              card->rx.qdio_err, "qinerr")))
6002                         skbs_done = qeth_extract_skbs(card, budget, buffer,
6003                                                       &done);
6004                 else
6005                         done = true;
6006
6007                 work_done += skbs_done;
6008                 budget -= skbs_done;
6009
6010                 if (done) {
6011                         QETH_CARD_STAT_INC(card, rx_bufs);
6012                         qeth_put_buffer_pool_entry(card, buffer->pool_entry);
6013                         buffer->pool_entry = NULL;
6014                         card->rx.b_count--;
6015                         ctx->bufs_refill++;
6016                         ctx->bufs_refill -= qeth_rx_refill_queue(card,
6017                                                                  ctx->bufs_refill);
6018
6019                         /* Step forward to next buffer: */
6020                         card->rx.b_index = QDIO_BUFNR(card->rx.b_index + 1);
6021                         card->rx.buf_element = 0;
6022                         card->rx.e_offset = 0;
6023                 }
6024         }
6025
6026         return work_done;
6027 }
6028
6029 static void qeth_cq_poll(struct qeth_card *card)
6030 {
6031         unsigned int work_done = 0;
6032
6033         while (work_done < QDIO_MAX_BUFFERS_PER_Q) {
6034                 unsigned int start, error;
6035                 int completed;
6036
6037                 completed = qdio_inspect_queue(CARD_DDEV(card), 1, true, &start,
6038                                                &error);
6039                 if (completed <= 0)
6040                         return;
6041
6042                 qeth_qdio_cq_handler(card, error, 1, start, completed);
6043                 work_done += completed;
6044         }
6045 }
6046
6047 int qeth_poll(struct napi_struct *napi, int budget)
6048 {
6049         struct qeth_card *card = container_of(napi, struct qeth_card, napi);
6050         unsigned int work_done;
6051
6052         work_done = qeth_rx_poll(card, budget);
6053
6054         if (card->options.cq == QETH_CQ_ENABLED)
6055                 qeth_cq_poll(card);
6056
6057         if (budget) {
6058                 struct qeth_rx *ctx = &card->rx;
6059
6060                 /* Process any substantial refill backlog: */
6061                 ctx->bufs_refill -= qeth_rx_refill_queue(card, ctx->bufs_refill);
6062
6063                 /* Exhausted the RX budget. Keep IRQ disabled, we get called again. */
6064                 if (work_done >= budget)
6065                         return work_done;
6066         }
6067
6068         if (napi_complete_done(napi, work_done) &&
6069             qdio_start_irq(CARD_DDEV(card)))
6070                 napi_schedule(napi);
6071
6072         return work_done;
6073 }
6074 EXPORT_SYMBOL_GPL(qeth_poll);
6075
6076 static void qeth_iqd_tx_complete(struct qeth_qdio_out_q *queue,
6077                                  unsigned int bidx, bool error, int budget)
6078 {
6079         struct qeth_qdio_out_buffer *buffer = queue->bufs[bidx];
6080         u8 sflags = buffer->buffer->element[15].sflags;
6081         struct qeth_card *card = queue->card;
6082
6083         if (queue->bufstates && (queue->bufstates[bidx].flags &
6084                                  QDIO_OUTBUF_STATE_FLAG_PENDING)) {
6085                 WARN_ON_ONCE(card->options.cq != QETH_CQ_ENABLED);
6086
6087                 QETH_CARD_TEXT_(card, 5, "pel%u", bidx);
6088
6089                 switch (atomic_cmpxchg(&buffer->state,
6090                                        QETH_QDIO_BUF_PRIMED,
6091                                        QETH_QDIO_BUF_PENDING)) {
6092                 case QETH_QDIO_BUF_PRIMED:
6093                         /* We have initial ownership, no QAOB (yet): */
6094                         qeth_notify_skbs(queue, buffer, TX_NOTIFY_PENDING);
6095
6096                         /* Handle race with qeth_qdio_handle_aob(): */
6097                         switch (atomic_xchg(&buffer->state,
6098                                             QETH_QDIO_BUF_NEED_QAOB)) {
6099                         case QETH_QDIO_BUF_PENDING:
6100                                 /* No concurrent QAOB notification. */
6101
6102                                 /* Prepare the queue slot for immediate re-use: */
6103                                 qeth_scrub_qdio_buffer(buffer->buffer, queue->max_elements);
6104                                 if (qeth_init_qdio_out_buf(queue, bidx)) {
6105                                         QETH_CARD_TEXT(card, 2, "outofbuf");
6106                                         qeth_schedule_recovery(card);
6107                                 }
6108
6109                                 /* Skip clearing the buffer: */
6110                                 return;
6111                         case QETH_QDIO_BUF_QAOB_OK:
6112                                 qeth_notify_skbs(queue, buffer,
6113                                                  TX_NOTIFY_DELAYED_OK);
6114                                 error = false;
6115                                 break;
6116                         case QETH_QDIO_BUF_QAOB_ERROR:
6117                                 qeth_notify_skbs(queue, buffer,
6118                                                  TX_NOTIFY_DELAYED_GENERALERROR);
6119                                 error = true;
6120                                 break;
6121                         default:
6122                                 WARN_ON_ONCE(1);
6123                         }
6124
6125                         break;
6126                 case QETH_QDIO_BUF_QAOB_OK:
6127                         /* qeth_qdio_handle_aob() already received a QAOB: */
6128                         qeth_notify_skbs(queue, buffer, TX_NOTIFY_OK);
6129                         error = false;
6130                         break;
6131                 case QETH_QDIO_BUF_QAOB_ERROR:
6132                         /* qeth_qdio_handle_aob() already received a QAOB: */
6133                         qeth_notify_skbs(queue, buffer, TX_NOTIFY_GENERALERROR);
6134                         error = true;
6135                         break;
6136                 default:
6137                         WARN_ON_ONCE(1);
6138                 }
6139         } else if (card->options.cq == QETH_CQ_ENABLED) {
6140                 qeth_notify_skbs(queue, buffer,
6141                                  qeth_compute_cq_notification(sflags, 0));
6142         }
6143
6144         qeth_clear_output_buffer(queue, buffer, error, budget);
6145 }
6146
6147 static int qeth_tx_poll(struct napi_struct *napi, int budget)
6148 {
6149         struct qeth_qdio_out_q *queue = qeth_napi_to_out_queue(napi);
6150         unsigned int queue_no = queue->queue_no;
6151         struct qeth_card *card = queue->card;
6152         struct net_device *dev = card->dev;
6153         unsigned int work_done = 0;
6154         struct netdev_queue *txq;
6155
6156         txq = netdev_get_tx_queue(dev, qeth_iqd_translate_txq(dev, queue_no));
6157
6158         while (1) {
6159                 unsigned int start, error, i;
6160                 unsigned int packets = 0;
6161                 unsigned int bytes = 0;
6162                 int completed;
6163
6164                 if (qeth_out_queue_is_empty(queue)) {
6165                         napi_complete(napi);
6166                         return 0;
6167                 }
6168
6169                 /* Give the CPU a breather: */
6170                 if (work_done >= QDIO_MAX_BUFFERS_PER_Q) {
6171                         QETH_TXQ_STAT_INC(queue, completion_yield);
6172                         if (napi_complete_done(napi, 0))
6173                                 napi_schedule(napi);
6174                         return 0;
6175                 }
6176
6177                 completed = qdio_inspect_queue(CARD_DDEV(card), queue_no, false,
6178                                                &start, &error);
6179                 if (completed <= 0) {
6180                         /* Ensure we see TX completion for pending work: */
6181                         if (napi_complete_done(napi, 0))
6182                                 qeth_tx_arm_timer(queue, QETH_TX_TIMER_USECS);
6183                         return 0;
6184                 }
6185
6186                 for (i = start; i < start + completed; i++) {
6187                         struct qeth_qdio_out_buffer *buffer;
6188                         unsigned int bidx = QDIO_BUFNR(i);
6189
6190                         buffer = queue->bufs[bidx];
6191                         packets += buffer->frames;
6192                         bytes += buffer->bytes;
6193
6194                         qeth_handle_send_error(card, buffer, error);
6195                         qeth_iqd_tx_complete(queue, bidx, error, budget);
6196                         qeth_cleanup_handled_pending(queue, bidx, false);
6197                 }
6198
6199                 netdev_tx_completed_queue(txq, packets, bytes);
6200                 atomic_sub(completed, &queue->used_buffers);
6201                 work_done += completed;
6202
6203                 /* xmit may have observed the full-condition, but not yet
6204                  * stopped the txq. In which case the code below won't trigger.
6205                  * So before returning, xmit will re-check the txq's fill level
6206                  * and wake it up if needed.
6207                  */
6208                 if (netif_tx_queue_stopped(txq) &&
6209                     !qeth_out_queue_is_full(queue))
6210                         netif_tx_wake_queue(txq);
6211         }
6212 }
6213
6214 static int qeth_setassparms_inspect_rc(struct qeth_ipa_cmd *cmd)
6215 {
6216         if (!cmd->hdr.return_code)
6217                 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
6218         return cmd->hdr.return_code;
6219 }
6220
6221 static int qeth_setassparms_get_caps_cb(struct qeth_card *card,
6222                                         struct qeth_reply *reply,
6223                                         unsigned long data)
6224 {
6225         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6226         struct qeth_ipa_caps *caps = reply->param;
6227
6228         if (qeth_setassparms_inspect_rc(cmd))
6229                 return -EIO;
6230
6231         caps->supported = cmd->data.setassparms.data.caps.supported;
6232         caps->enabled = cmd->data.setassparms.data.caps.enabled;
6233         return 0;
6234 }
6235
6236 int qeth_setassparms_cb(struct qeth_card *card,
6237                         struct qeth_reply *reply, unsigned long data)
6238 {
6239         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6240
6241         QETH_CARD_TEXT(card, 4, "defadpcb");
6242
6243         if (cmd->hdr.return_code)
6244                 return -EIO;
6245
6246         cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
6247         if (cmd->hdr.prot_version == QETH_PROT_IPV4)
6248                 card->options.ipa4.enabled = cmd->hdr.assists.enabled;
6249         if (cmd->hdr.prot_version == QETH_PROT_IPV6)
6250                 card->options.ipa6.enabled = cmd->hdr.assists.enabled;
6251         return 0;
6252 }
6253 EXPORT_SYMBOL_GPL(qeth_setassparms_cb);
6254
6255 struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card,
6256                                                  enum qeth_ipa_funcs ipa_func,
6257                                                  u16 cmd_code,
6258                                                  unsigned int data_length,
6259                                                  enum qeth_prot_versions prot)
6260 {
6261         struct qeth_ipacmd_setassparms *setassparms;
6262         struct qeth_ipacmd_setassparms_hdr *hdr;
6263         struct qeth_cmd_buffer *iob;
6264
6265         QETH_CARD_TEXT(card, 4, "getasscm");
6266         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETASSPARMS, prot,
6267                                  data_length +
6268                                  offsetof(struct qeth_ipacmd_setassparms,
6269                                           data));
6270         if (!iob)
6271                 return NULL;
6272
6273         setassparms = &__ipa_cmd(iob)->data.setassparms;
6274         setassparms->assist_no = ipa_func;
6275
6276         hdr = &setassparms->hdr;
6277         hdr->length = sizeof(*hdr) + data_length;
6278         hdr->command_code = cmd_code;
6279         return iob;
6280 }
6281 EXPORT_SYMBOL_GPL(qeth_get_setassparms_cmd);
6282
6283 int qeth_send_simple_setassparms_prot(struct qeth_card *card,
6284                                       enum qeth_ipa_funcs ipa_func,
6285                                       u16 cmd_code, u32 *data,
6286                                       enum qeth_prot_versions prot)
6287 {
6288         unsigned int length = data ? SETASS_DATA_SIZEOF(flags_32bit) : 0;
6289         struct qeth_cmd_buffer *iob;
6290
6291         QETH_CARD_TEXT_(card, 4, "simassp%i", prot);
6292         iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code, length, prot);
6293         if (!iob)
6294                 return -ENOMEM;
6295
6296         if (data)
6297                 __ipa_cmd(iob)->data.setassparms.data.flags_32bit = *data;
6298         return qeth_send_ipa_cmd(card, iob, qeth_setassparms_cb, NULL);
6299 }
6300 EXPORT_SYMBOL_GPL(qeth_send_simple_setassparms_prot);
6301
6302 static void qeth_unregister_dbf_views(void)
6303 {
6304         int x;
6305
6306         for (x = 0; x < QETH_DBF_INFOS; x++) {
6307                 debug_unregister(qeth_dbf[x].id);
6308                 qeth_dbf[x].id = NULL;
6309         }
6310 }
6311
6312 void qeth_dbf_longtext(debug_info_t *id, int level, char *fmt, ...)
6313 {
6314         char dbf_txt_buf[32];
6315         va_list args;
6316
6317         if (!debug_level_enabled(id, level))
6318                 return;
6319         va_start(args, fmt);
6320         vsnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
6321         va_end(args);
6322         debug_text_event(id, level, dbf_txt_buf);
6323 }
6324 EXPORT_SYMBOL_GPL(qeth_dbf_longtext);
6325
6326 static int qeth_register_dbf_views(void)
6327 {
6328         int ret;
6329         int x;
6330
6331         for (x = 0; x < QETH_DBF_INFOS; x++) {
6332                 /* register the areas */
6333                 qeth_dbf[x].id = debug_register(qeth_dbf[x].name,
6334                                                 qeth_dbf[x].pages,
6335                                                 qeth_dbf[x].areas,
6336                                                 qeth_dbf[x].len);
6337                 if (qeth_dbf[x].id == NULL) {
6338                         qeth_unregister_dbf_views();
6339                         return -ENOMEM;
6340                 }
6341
6342                 /* register a view */
6343                 ret = debug_register_view(qeth_dbf[x].id, qeth_dbf[x].view);
6344                 if (ret) {
6345                         qeth_unregister_dbf_views();
6346                         return ret;
6347                 }
6348
6349                 /* set a passing level */
6350                 debug_set_level(qeth_dbf[x].id, qeth_dbf[x].level);
6351         }
6352
6353         return 0;
6354 }
6355
6356 static DEFINE_MUTEX(qeth_mod_mutex);    /* for synchronized module loading */
6357
6358 int qeth_setup_discipline(struct qeth_card *card,
6359                           enum qeth_discipline_id discipline)
6360 {
6361         int rc;
6362
6363         mutex_lock(&qeth_mod_mutex);
6364         switch (discipline) {
6365         case QETH_DISCIPLINE_LAYER3:
6366                 card->discipline = try_then_request_module(
6367                         symbol_get(qeth_l3_discipline), "qeth_l3");
6368                 break;
6369         case QETH_DISCIPLINE_LAYER2:
6370                 card->discipline = try_then_request_module(
6371                         symbol_get(qeth_l2_discipline), "qeth_l2");
6372                 break;
6373         default:
6374                 break;
6375         }
6376         mutex_unlock(&qeth_mod_mutex);
6377
6378         if (!card->discipline) {
6379                 dev_err(&card->gdev->dev, "There is no kernel module to "
6380                         "support discipline %d\n", discipline);
6381                 return -EINVAL;
6382         }
6383
6384         rc = card->discipline->setup(card->gdev);
6385         if (rc) {
6386                 if (discipline == QETH_DISCIPLINE_LAYER2)
6387                         symbol_put(qeth_l2_discipline);
6388                 else
6389                         symbol_put(qeth_l3_discipline);
6390                 card->discipline = NULL;
6391
6392                 return rc;
6393         }
6394
6395         card->options.layer = discipline;
6396         return 0;
6397 }
6398
6399 void qeth_remove_discipline(struct qeth_card *card)
6400 {
6401         card->discipline->remove(card->gdev);
6402
6403         if (IS_LAYER2(card))
6404                 symbol_put(qeth_l2_discipline);
6405         else
6406                 symbol_put(qeth_l3_discipline);
6407         card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
6408         card->discipline = NULL;
6409 }
6410
6411 const struct device_type qeth_generic_devtype = {
6412         .name = "qeth_generic",
6413 };
6414 EXPORT_SYMBOL_GPL(qeth_generic_devtype);
6415
6416 static const struct device_type qeth_osn_devtype = {
6417         .name = "qeth_osn",
6418 };
6419
6420 #define DBF_NAME_LEN    20
6421
6422 struct qeth_dbf_entry {
6423         char dbf_name[DBF_NAME_LEN];
6424         debug_info_t *dbf_info;
6425         struct list_head dbf_list;
6426 };
6427
6428 static LIST_HEAD(qeth_dbf_list);
6429 static DEFINE_MUTEX(qeth_dbf_list_mutex);
6430
6431 static debug_info_t *qeth_get_dbf_entry(char *name)
6432 {
6433         struct qeth_dbf_entry *entry;
6434         debug_info_t *rc = NULL;
6435
6436         mutex_lock(&qeth_dbf_list_mutex);
6437         list_for_each_entry(entry, &qeth_dbf_list, dbf_list) {
6438                 if (strcmp(entry->dbf_name, name) == 0) {
6439                         rc = entry->dbf_info;
6440                         break;
6441                 }
6442         }
6443         mutex_unlock(&qeth_dbf_list_mutex);
6444         return rc;
6445 }
6446
6447 static int qeth_add_dbf_entry(struct qeth_card *card, char *name)
6448 {
6449         struct qeth_dbf_entry *new_entry;
6450
6451         card->debug = debug_register(name, 2, 1, 8);
6452         if (!card->debug) {
6453                 QETH_DBF_TEXT_(SETUP, 2, "%s", "qcdbf");
6454                 goto err;
6455         }
6456         if (debug_register_view(card->debug, &debug_hex_ascii_view))
6457                 goto err_dbg;
6458         new_entry = kzalloc(sizeof(struct qeth_dbf_entry), GFP_KERNEL);
6459         if (!new_entry)
6460                 goto err_dbg;
6461         strncpy(new_entry->dbf_name, name, DBF_NAME_LEN);
6462         new_entry->dbf_info = card->debug;
6463         mutex_lock(&qeth_dbf_list_mutex);
6464         list_add(&new_entry->dbf_list, &qeth_dbf_list);
6465         mutex_unlock(&qeth_dbf_list_mutex);
6466
6467         return 0;
6468
6469 err_dbg:
6470         debug_unregister(card->debug);
6471 err:
6472         return -ENOMEM;
6473 }
6474
6475 static void qeth_clear_dbf_list(void)
6476 {
6477         struct qeth_dbf_entry *entry, *tmp;
6478
6479         mutex_lock(&qeth_dbf_list_mutex);
6480         list_for_each_entry_safe(entry, tmp, &qeth_dbf_list, dbf_list) {
6481                 list_del(&entry->dbf_list);
6482                 debug_unregister(entry->dbf_info);
6483                 kfree(entry);
6484         }
6485         mutex_unlock(&qeth_dbf_list_mutex);
6486 }
6487
6488 static struct net_device *qeth_alloc_netdev(struct qeth_card *card)
6489 {
6490         struct net_device *dev;
6491         struct qeth_priv *priv;
6492
6493         switch (card->info.type) {
6494         case QETH_CARD_TYPE_IQD:
6495                 dev = alloc_netdev_mqs(sizeof(*priv), "hsi%d", NET_NAME_UNKNOWN,
6496                                        ether_setup, QETH_MAX_OUT_QUEUES, 1);
6497                 break;
6498         case QETH_CARD_TYPE_OSM:
6499                 dev = alloc_etherdev(sizeof(*priv));
6500                 break;
6501         case QETH_CARD_TYPE_OSN:
6502                 dev = alloc_netdev(sizeof(*priv), "osn%d", NET_NAME_UNKNOWN,
6503                                    ether_setup);
6504                 break;
6505         default:
6506                 dev = alloc_etherdev_mqs(sizeof(*priv), QETH_MAX_OUT_QUEUES, 1);
6507         }
6508
6509         if (!dev)
6510                 return NULL;
6511
6512         priv = netdev_priv(dev);
6513         priv->rx_copybreak = QETH_RX_COPYBREAK;
6514         priv->tx_wanted_queues = IS_IQD(card) ? QETH_IQD_MIN_TXQ : 1;
6515
6516         dev->ml_priv = card;
6517         dev->watchdog_timeo = QETH_TX_TIMEOUT;
6518         dev->min_mtu = IS_OSN(card) ? 64 : 576;
6519          /* initialized when device first goes online: */
6520         dev->max_mtu = 0;
6521         dev->mtu = 0;
6522         SET_NETDEV_DEV(dev, &card->gdev->dev);
6523         netif_carrier_off(dev);
6524
6525         if (IS_OSN(card)) {
6526                 dev->ethtool_ops = &qeth_osn_ethtool_ops;
6527         } else {
6528                 dev->ethtool_ops = &qeth_ethtool_ops;
6529                 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
6530                 dev->hw_features |= NETIF_F_SG;
6531                 dev->vlan_features |= NETIF_F_SG;
6532                 if (IS_IQD(card))
6533                         dev->features |= NETIF_F_SG;
6534         }
6535
6536         return dev;
6537 }
6538
6539 struct net_device *qeth_clone_netdev(struct net_device *orig)
6540 {
6541         struct net_device *clone = qeth_alloc_netdev(orig->ml_priv);
6542
6543         if (!clone)
6544                 return NULL;
6545
6546         clone->dev_port = orig->dev_port;
6547         return clone;
6548 }
6549
6550 static int qeth_core_probe_device(struct ccwgroup_device *gdev)
6551 {
6552         struct qeth_card *card;
6553         struct device *dev;
6554         int rc;
6555         enum qeth_discipline_id enforced_disc;
6556         char dbf_name[DBF_NAME_LEN];
6557
6558         QETH_DBF_TEXT(SETUP, 2, "probedev");
6559
6560         dev = &gdev->dev;
6561         if (!get_device(dev))
6562                 return -ENODEV;
6563
6564         QETH_DBF_TEXT_(SETUP, 2, "%s", dev_name(&gdev->dev));
6565
6566         card = qeth_alloc_card(gdev);
6567         if (!card) {
6568                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM);
6569                 rc = -ENOMEM;
6570                 goto err_dev;
6571         }
6572
6573         snprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
6574                 dev_name(&gdev->dev));
6575         card->debug = qeth_get_dbf_entry(dbf_name);
6576         if (!card->debug) {
6577                 rc = qeth_add_dbf_entry(card, dbf_name);
6578                 if (rc)
6579                         goto err_card;
6580         }
6581
6582         qeth_setup_card(card);
6583         card->dev = qeth_alloc_netdev(card);
6584         if (!card->dev) {
6585                 rc = -ENOMEM;
6586                 goto err_card;
6587         }
6588
6589         qeth_determine_capabilities(card);
6590         qeth_set_blkt_defaults(card);
6591
6592         card->qdio.no_out_queues = card->dev->num_tx_queues;
6593         rc = qeth_update_from_chp_desc(card);
6594         if (rc)
6595                 goto err_chp_desc;
6596
6597         if (IS_OSN(card))
6598                 gdev->dev.groups = qeth_osn_dev_groups;
6599         else
6600                 gdev->dev.groups = qeth_dev_groups;
6601
6602         enforced_disc = qeth_enforce_discipline(card);
6603         switch (enforced_disc) {
6604         case QETH_DISCIPLINE_UNDETERMINED:
6605                 gdev->dev.type = &qeth_generic_devtype;
6606                 break;
6607         default:
6608                 card->info.layer_enforced = true;
6609                 /* It's so early that we don't need the discipline_mutex yet. */
6610                 rc = qeth_setup_discipline(card, enforced_disc);
6611                 if (rc)
6612                         goto err_setup_disc;
6613
6614                 gdev->dev.type = IS_OSN(card) ? &qeth_osn_devtype :
6615                                                 card->discipline->devtype;
6616                 break;
6617         }
6618
6619         return 0;
6620
6621 err_setup_disc:
6622 err_chp_desc:
6623         free_netdev(card->dev);
6624 err_card:
6625         qeth_core_free_card(card);
6626 err_dev:
6627         put_device(dev);
6628         return rc;
6629 }
6630
6631 static void qeth_core_remove_device(struct ccwgroup_device *gdev)
6632 {
6633         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6634
6635         QETH_CARD_TEXT(card, 2, "removedv");
6636
6637         mutex_lock(&card->discipline_mutex);
6638         if (card->discipline)
6639                 qeth_remove_discipline(card);
6640         mutex_unlock(&card->discipline_mutex);
6641
6642         qeth_free_qdio_queues(card);
6643
6644         free_netdev(card->dev);
6645         qeth_core_free_card(card);
6646         put_device(&gdev->dev);
6647 }
6648
6649 static int qeth_core_set_online(struct ccwgroup_device *gdev)
6650 {
6651         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6652         int rc = 0;
6653         enum qeth_discipline_id def_discipline;
6654
6655         mutex_lock(&card->discipline_mutex);
6656         if (!card->discipline) {
6657                 def_discipline = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
6658                                                 QETH_DISCIPLINE_LAYER2;
6659                 rc = qeth_setup_discipline(card, def_discipline);
6660                 if (rc)
6661                         goto err;
6662         }
6663
6664         rc = qeth_set_online(card, card->discipline);
6665
6666 err:
6667         mutex_unlock(&card->discipline_mutex);
6668         return rc;
6669 }
6670
6671 static int qeth_core_set_offline(struct ccwgroup_device *gdev)
6672 {
6673         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6674         int rc;
6675
6676         mutex_lock(&card->discipline_mutex);
6677         rc = qeth_set_offline(card, card->discipline, false);
6678         mutex_unlock(&card->discipline_mutex);
6679
6680         return rc;
6681 }
6682
6683 static void qeth_core_shutdown(struct ccwgroup_device *gdev)
6684 {
6685         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6686
6687         qeth_set_allowed_threads(card, 0, 1);
6688         if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
6689                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
6690         qeth_qdio_clear_card(card, 0);
6691         qeth_drain_output_queues(card);
6692         qdio_free(CARD_DDEV(card));
6693 }
6694
6695 static ssize_t group_store(struct device_driver *ddrv, const char *buf,
6696                            size_t count)
6697 {
6698         int err;
6699
6700         err = ccwgroup_create_dev(qeth_core_root_dev, to_ccwgroupdrv(ddrv), 3,
6701                                   buf);
6702
6703         return err ? err : count;
6704 }
6705 static DRIVER_ATTR_WO(group);
6706
6707 static struct attribute *qeth_drv_attrs[] = {
6708         &driver_attr_group.attr,
6709         NULL,
6710 };
6711 static struct attribute_group qeth_drv_attr_group = {
6712         .attrs = qeth_drv_attrs,
6713 };
6714 static const struct attribute_group *qeth_drv_attr_groups[] = {
6715         &qeth_drv_attr_group,
6716         NULL,
6717 };
6718
6719 static struct ccwgroup_driver qeth_core_ccwgroup_driver = {
6720         .driver = {
6721                 .groups = qeth_drv_attr_groups,
6722                 .owner = THIS_MODULE,
6723                 .name = "qeth",
6724         },
6725         .ccw_driver = &qeth_ccw_driver,
6726         .setup = qeth_core_probe_device,
6727         .remove = qeth_core_remove_device,
6728         .set_online = qeth_core_set_online,
6729         .set_offline = qeth_core_set_offline,
6730         .shutdown = qeth_core_shutdown,
6731 };
6732
6733 struct qeth_card *qeth_get_card_by_busid(char *bus_id)
6734 {
6735         struct ccwgroup_device *gdev;
6736         struct qeth_card *card;
6737
6738         gdev = get_ccwgroupdev_by_busid(&qeth_core_ccwgroup_driver, bus_id);
6739         if (!gdev)
6740                 return NULL;
6741
6742         card = dev_get_drvdata(&gdev->dev);
6743         put_device(&gdev->dev);
6744         return card;
6745 }
6746 EXPORT_SYMBOL_GPL(qeth_get_card_by_busid);
6747
6748 int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
6749 {
6750         struct qeth_card *card = dev->ml_priv;
6751         struct mii_ioctl_data *mii_data;
6752         int rc = 0;
6753
6754         switch (cmd) {
6755         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
6756                 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
6757                 break;
6758         case SIOC_QETH_GET_CARD_TYPE:
6759                 if ((IS_OSD(card) || IS_OSM(card) || IS_OSX(card)) &&
6760                     !IS_VM_NIC(card))
6761                         return 1;
6762                 return 0;
6763         case SIOCGMIIPHY:
6764                 mii_data = if_mii(rq);
6765                 mii_data->phy_id = 0;
6766                 break;
6767         case SIOCGMIIREG:
6768                 mii_data = if_mii(rq);
6769                 if (mii_data->phy_id != 0)
6770                         rc = -EINVAL;
6771                 else
6772                         mii_data->val_out = qeth_mdio_read(dev,
6773                                 mii_data->phy_id, mii_data->reg_num);
6774                 break;
6775         case SIOC_QETH_QUERY_OAT:
6776                 rc = qeth_query_oat_command(card, rq->ifr_ifru.ifru_data);
6777                 break;
6778         default:
6779                 if (card->discipline->do_ioctl)
6780                         rc = card->discipline->do_ioctl(dev, rq, cmd);
6781                 else
6782                         rc = -EOPNOTSUPP;
6783         }
6784         if (rc)
6785                 QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
6786         return rc;
6787 }
6788 EXPORT_SYMBOL_GPL(qeth_do_ioctl);
6789
6790 static int qeth_start_csum_cb(struct qeth_card *card, struct qeth_reply *reply,
6791                               unsigned long data)
6792 {
6793         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6794         u32 *features = reply->param;
6795
6796         if (qeth_setassparms_inspect_rc(cmd))
6797                 return -EIO;
6798
6799         *features = cmd->data.setassparms.data.flags_32bit;
6800         return 0;
6801 }
6802
6803 static int qeth_set_csum_off(struct qeth_card *card, enum qeth_ipa_funcs cstype,
6804                              enum qeth_prot_versions prot)
6805 {
6806         return qeth_send_simple_setassparms_prot(card, cstype, IPA_CMD_ASS_STOP,
6807                                                  NULL, prot);
6808 }
6809
6810 static int qeth_set_csum_on(struct qeth_card *card, enum qeth_ipa_funcs cstype,
6811                             enum qeth_prot_versions prot, u8 *lp2lp)
6812 {
6813         u32 required_features = QETH_IPA_CHECKSUM_UDP | QETH_IPA_CHECKSUM_TCP;
6814         struct qeth_cmd_buffer *iob;
6815         struct qeth_ipa_caps caps;
6816         u32 features;
6817         int rc;
6818
6819         /* some L3 HW requires combined L3+L4 csum offload: */
6820         if (IS_LAYER3(card) && prot == QETH_PROT_IPV4 &&
6821             cstype == IPA_OUTBOUND_CHECKSUM)
6822                 required_features |= QETH_IPA_CHECKSUM_IP_HDR;
6823
6824         iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_START, 0,
6825                                        prot);
6826         if (!iob)
6827                 return -ENOMEM;
6828
6829         rc = qeth_send_ipa_cmd(card, iob, qeth_start_csum_cb, &features);
6830         if (rc)
6831                 return rc;
6832
6833         if ((required_features & features) != required_features) {
6834                 qeth_set_csum_off(card, cstype, prot);
6835                 return -EOPNOTSUPP;
6836         }
6837
6838         iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_ENABLE,
6839                                        SETASS_DATA_SIZEOF(flags_32bit),
6840                                        prot);
6841         if (!iob) {
6842                 qeth_set_csum_off(card, cstype, prot);
6843                 return -ENOMEM;
6844         }
6845
6846         if (features & QETH_IPA_CHECKSUM_LP2LP)
6847                 required_features |= QETH_IPA_CHECKSUM_LP2LP;
6848         __ipa_cmd(iob)->data.setassparms.data.flags_32bit = required_features;
6849         rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6850         if (rc) {
6851                 qeth_set_csum_off(card, cstype, prot);
6852                 return rc;
6853         }
6854
6855         if (!qeth_ipa_caps_supported(&caps, required_features) ||
6856             !qeth_ipa_caps_enabled(&caps, required_features)) {
6857                 qeth_set_csum_off(card, cstype, prot);
6858                 return -EOPNOTSUPP;
6859         }
6860
6861         dev_info(&card->gdev->dev, "HW Checksumming (%sbound IPv%d) enabled\n",
6862                  cstype == IPA_INBOUND_CHECKSUM ? "in" : "out", prot);
6863
6864         if (lp2lp)
6865                 *lp2lp = qeth_ipa_caps_enabled(&caps, QETH_IPA_CHECKSUM_LP2LP);
6866
6867         return 0;
6868 }
6869
6870 static int qeth_set_ipa_csum(struct qeth_card *card, bool on, int cstype,
6871                              enum qeth_prot_versions prot, u8 *lp2lp)
6872 {
6873         return on ? qeth_set_csum_on(card, cstype, prot, lp2lp) :
6874                     qeth_set_csum_off(card, cstype, prot);
6875 }
6876
6877 static int qeth_start_tso_cb(struct qeth_card *card, struct qeth_reply *reply,
6878                              unsigned long data)
6879 {
6880         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6881         struct qeth_tso_start_data *tso_data = reply->param;
6882
6883         if (qeth_setassparms_inspect_rc(cmd))
6884                 return -EIO;
6885
6886         tso_data->mss = cmd->data.setassparms.data.tso.mss;
6887         tso_data->supported = cmd->data.setassparms.data.tso.supported;
6888         return 0;
6889 }
6890
6891 static int qeth_set_tso_off(struct qeth_card *card,
6892                             enum qeth_prot_versions prot)
6893 {
6894         return qeth_send_simple_setassparms_prot(card, IPA_OUTBOUND_TSO,
6895                                                  IPA_CMD_ASS_STOP, NULL, prot);
6896 }
6897
6898 static int qeth_set_tso_on(struct qeth_card *card,
6899                            enum qeth_prot_versions prot)
6900 {
6901         struct qeth_tso_start_data tso_data;
6902         struct qeth_cmd_buffer *iob;
6903         struct qeth_ipa_caps caps;
6904         int rc;
6905
6906         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6907                                        IPA_CMD_ASS_START, 0, prot);
6908         if (!iob)
6909                 return -ENOMEM;
6910
6911         rc = qeth_send_ipa_cmd(card, iob, qeth_start_tso_cb, &tso_data);
6912         if (rc)
6913                 return rc;
6914
6915         if (!tso_data.mss || !(tso_data.supported & QETH_IPA_LARGE_SEND_TCP)) {
6916                 qeth_set_tso_off(card, prot);
6917                 return -EOPNOTSUPP;
6918         }
6919
6920         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6921                                        IPA_CMD_ASS_ENABLE,
6922                                        SETASS_DATA_SIZEOF(caps), prot);
6923         if (!iob) {
6924                 qeth_set_tso_off(card, prot);
6925                 return -ENOMEM;
6926         }
6927
6928         /* enable TSO capability */
6929         __ipa_cmd(iob)->data.setassparms.data.caps.enabled =
6930                 QETH_IPA_LARGE_SEND_TCP;
6931         rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6932         if (rc) {
6933                 qeth_set_tso_off(card, prot);
6934                 return rc;
6935         }
6936
6937         if (!qeth_ipa_caps_supported(&caps, QETH_IPA_LARGE_SEND_TCP) ||
6938             !qeth_ipa_caps_enabled(&caps, QETH_IPA_LARGE_SEND_TCP)) {
6939                 qeth_set_tso_off(card, prot);
6940                 return -EOPNOTSUPP;
6941         }
6942
6943         dev_info(&card->gdev->dev, "TSOv%u enabled (MSS: %u)\n", prot,
6944                  tso_data.mss);
6945         return 0;
6946 }
6947
6948 static int qeth_set_ipa_tso(struct qeth_card *card, bool on,
6949                             enum qeth_prot_versions prot)
6950 {
6951         return on ? qeth_set_tso_on(card, prot) : qeth_set_tso_off(card, prot);
6952 }
6953
6954 static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on)
6955 {
6956         int rc_ipv4 = (on) ? -EOPNOTSUPP : 0;
6957         int rc_ipv6;
6958
6959         if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
6960                 rc_ipv4 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6961                                             QETH_PROT_IPV4, NULL);
6962         if (!qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6963                 /* no/one Offload Assist available, so the rc is trivial */
6964                 return rc_ipv4;
6965
6966         rc_ipv6 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6967                                     QETH_PROT_IPV6, NULL);
6968
6969         if (on)
6970                 /* enable: success if any Assist is active */
6971                 return (rc_ipv6) ? rc_ipv4 : 0;
6972
6973         /* disable: failure if any Assist is still active */
6974         return (rc_ipv6) ? rc_ipv6 : rc_ipv4;
6975 }
6976
6977 /**
6978  * qeth_enable_hw_features() - (Re-)Enable HW functions for device features
6979  * @dev:        a net_device
6980  */
6981 void qeth_enable_hw_features(struct net_device *dev)
6982 {
6983         struct qeth_card *card = dev->ml_priv;
6984         netdev_features_t features;
6985
6986         features = dev->features;
6987         /* force-off any feature that might need an IPA sequence.
6988          * netdev_update_features() will restart them.
6989          */
6990         dev->features &= ~dev->hw_features;
6991         /* toggle VLAN filter, so that VIDs are re-programmed: */
6992         if (IS_LAYER2(card) && IS_VM_NIC(card)) {
6993                 dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
6994                 dev->wanted_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
6995         }
6996         netdev_update_features(dev);
6997         if (features != dev->features)
6998                 dev_warn(&card->gdev->dev,
6999                          "Device recovery failed to restore all offload features\n");
7000 }
7001 EXPORT_SYMBOL_GPL(qeth_enable_hw_features);
7002
7003 static void qeth_check_restricted_features(struct qeth_card *card,
7004                                            netdev_features_t changed,
7005                                            netdev_features_t actual)
7006 {
7007         netdev_features_t ipv6_features = NETIF_F_TSO6;
7008         netdev_features_t ipv4_features = NETIF_F_TSO;
7009
7010         if (!card->info.has_lp2lp_cso_v6)
7011                 ipv6_features |= NETIF_F_IPV6_CSUM;
7012         if (!card->info.has_lp2lp_cso_v4)
7013                 ipv4_features |= NETIF_F_IP_CSUM;
7014
7015         if ((changed & ipv6_features) && !(actual & ipv6_features))
7016                 qeth_flush_local_addrs6(card);
7017         if ((changed & ipv4_features) && !(actual & ipv4_features))
7018                 qeth_flush_local_addrs4(card);
7019 }
7020
7021 int qeth_set_features(struct net_device *dev, netdev_features_t features)
7022 {
7023         struct qeth_card *card = dev->ml_priv;
7024         netdev_features_t changed = dev->features ^ features;
7025         int rc = 0;
7026
7027         QETH_CARD_TEXT(card, 2, "setfeat");
7028         QETH_CARD_HEX(card, 2, &features, sizeof(features));
7029
7030         if ((changed & NETIF_F_IP_CSUM)) {
7031                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IP_CSUM,
7032                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV4,
7033                                        &card->info.has_lp2lp_cso_v4);
7034                 if (rc)
7035                         changed ^= NETIF_F_IP_CSUM;
7036         }
7037         if (changed & NETIF_F_IPV6_CSUM) {
7038                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IPV6_CSUM,
7039                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV6,
7040                                        &card->info.has_lp2lp_cso_v6);
7041                 if (rc)
7042                         changed ^= NETIF_F_IPV6_CSUM;
7043         }
7044         if (changed & NETIF_F_RXCSUM) {
7045                 rc = qeth_set_ipa_rx_csum(card, features & NETIF_F_RXCSUM);
7046                 if (rc)
7047                         changed ^= NETIF_F_RXCSUM;
7048         }
7049         if (changed & NETIF_F_TSO) {
7050                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO,
7051                                       QETH_PROT_IPV4);
7052                 if (rc)
7053                         changed ^= NETIF_F_TSO;
7054         }
7055         if (changed & NETIF_F_TSO6) {
7056                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO6,
7057                                       QETH_PROT_IPV6);
7058                 if (rc)
7059                         changed ^= NETIF_F_TSO6;
7060         }
7061
7062         qeth_check_restricted_features(card, dev->features ^ features,
7063                                        dev->features ^ changed);
7064
7065         /* everything changed successfully? */
7066         if ((dev->features ^ features) == changed)
7067                 return 0;
7068         /* something went wrong. save changed features and return error */
7069         dev->features ^= changed;
7070         return -EIO;
7071 }
7072 EXPORT_SYMBOL_GPL(qeth_set_features);
7073
7074 netdev_features_t qeth_fix_features(struct net_device *dev,
7075                                     netdev_features_t features)
7076 {
7077         struct qeth_card *card = dev->ml_priv;
7078
7079         QETH_CARD_TEXT(card, 2, "fixfeat");
7080         if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM))
7081                 features &= ~NETIF_F_IP_CSUM;
7082         if (!qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6))
7083                 features &= ~NETIF_F_IPV6_CSUM;
7084         if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM) &&
7085             !qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
7086                 features &= ~NETIF_F_RXCSUM;
7087         if (!qeth_is_supported(card, IPA_OUTBOUND_TSO))
7088                 features &= ~NETIF_F_TSO;
7089         if (!qeth_is_supported6(card, IPA_OUTBOUND_TSO))
7090                 features &= ~NETIF_F_TSO6;
7091
7092         QETH_CARD_HEX(card, 2, &features, sizeof(features));
7093         return features;
7094 }
7095 EXPORT_SYMBOL_GPL(qeth_fix_features);
7096
7097 netdev_features_t qeth_features_check(struct sk_buff *skb,
7098                                       struct net_device *dev,
7099                                       netdev_features_t features)
7100 {
7101         struct qeth_card *card = dev->ml_priv;
7102
7103         /* Traffic with local next-hop is not eligible for some offloads: */
7104         if (skb->ip_summed == CHECKSUM_PARTIAL &&
7105             READ_ONCE(card->options.isolation) != ISOLATION_MODE_FWD) {
7106                 netdev_features_t restricted = 0;
7107
7108                 if (skb_is_gso(skb) && !netif_needs_gso(skb, features))
7109                         restricted |= NETIF_F_ALL_TSO;
7110
7111                 switch (vlan_get_protocol(skb)) {
7112                 case htons(ETH_P_IP):
7113                         if (!card->info.has_lp2lp_cso_v4)
7114                                 restricted |= NETIF_F_IP_CSUM;
7115
7116                         if (restricted && qeth_next_hop_is_local_v4(card, skb))
7117                                 features &= ~restricted;
7118                         break;
7119                 case htons(ETH_P_IPV6):
7120                         if (!card->info.has_lp2lp_cso_v6)
7121                                 restricted |= NETIF_F_IPV6_CSUM;
7122
7123                         if (restricted && qeth_next_hop_is_local_v6(card, skb))
7124                                 features &= ~restricted;
7125                         break;
7126                 default:
7127                         break;
7128                 }
7129         }
7130
7131         /* GSO segmentation builds skbs with
7132          *      a (small) linear part for the headers, and
7133          *      page frags for the data.
7134          * Compared to a linear skb, the header-only part consumes an
7135          * additional buffer element. This reduces buffer utilization, and
7136          * hurts throughput. So compress small segments into one element.
7137          */
7138         if (netif_needs_gso(skb, features)) {
7139                 /* match skb_segment(): */
7140                 unsigned int doffset = skb->data - skb_mac_header(skb);
7141                 unsigned int hsize = skb_shinfo(skb)->gso_size;
7142                 unsigned int hroom = skb_headroom(skb);
7143
7144                 /* linearize only if resulting skb allocations are order-0: */
7145                 if (SKB_DATA_ALIGN(hroom + doffset + hsize) <= SKB_MAX_HEAD(0))
7146                         features &= ~NETIF_F_SG;
7147         }
7148
7149         return vlan_features_check(skb, features);
7150 }
7151 EXPORT_SYMBOL_GPL(qeth_features_check);
7152
7153 void qeth_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
7154 {
7155         struct qeth_card *card = dev->ml_priv;
7156         struct qeth_qdio_out_q *queue;
7157         unsigned int i;
7158
7159         QETH_CARD_TEXT(card, 5, "getstat");
7160
7161         stats->rx_packets = card->stats.rx_packets;
7162         stats->rx_bytes = card->stats.rx_bytes;
7163         stats->rx_errors = card->stats.rx_length_errors +
7164                            card->stats.rx_frame_errors +
7165                            card->stats.rx_fifo_errors;
7166         stats->rx_dropped = card->stats.rx_dropped_nomem +
7167                             card->stats.rx_dropped_notsupp +
7168                             card->stats.rx_dropped_runt;
7169         stats->multicast = card->stats.rx_multicast;
7170         stats->rx_length_errors = card->stats.rx_length_errors;
7171         stats->rx_frame_errors = card->stats.rx_frame_errors;
7172         stats->rx_fifo_errors = card->stats.rx_fifo_errors;
7173
7174         for (i = 0; i < card->qdio.no_out_queues; i++) {
7175                 queue = card->qdio.out_qs[i];
7176
7177                 stats->tx_packets += queue->stats.tx_packets;
7178                 stats->tx_bytes += queue->stats.tx_bytes;
7179                 stats->tx_errors += queue->stats.tx_errors;
7180                 stats->tx_dropped += queue->stats.tx_dropped;
7181         }
7182 }
7183 EXPORT_SYMBOL_GPL(qeth_get_stats64);
7184
7185 #define TC_IQD_UCAST   0
7186 static void qeth_iqd_set_prio_tc_map(struct net_device *dev,
7187                                      unsigned int ucast_txqs)
7188 {
7189         unsigned int prio;
7190
7191         /* IQD requires mcast traffic to be placed on a dedicated queue, and
7192          * qeth_iqd_select_queue() deals with this.
7193          * For unicast traffic, we defer the queue selection to the stack.
7194          * By installing a trivial prio map that spans over only the unicast
7195          * queues, we can encourage the stack to spread the ucast traffic evenly
7196          * without selecting the mcast queue.
7197          */
7198
7199         /* One traffic class, spanning over all active ucast queues: */
7200         netdev_set_num_tc(dev, 1);
7201         netdev_set_tc_queue(dev, TC_IQD_UCAST, ucast_txqs,
7202                             QETH_IQD_MIN_UCAST_TXQ);
7203
7204         /* Map all priorities to this traffic class: */
7205         for (prio = 0; prio <= TC_BITMASK; prio++)
7206                 netdev_set_prio_tc_map(dev, prio, TC_IQD_UCAST);
7207 }
7208
7209 int qeth_set_real_num_tx_queues(struct qeth_card *card, unsigned int count)
7210 {
7211         struct net_device *dev = card->dev;
7212         int rc;
7213
7214         /* Per netif_setup_tc(), adjust the mapping first: */
7215         if (IS_IQD(card))
7216                 qeth_iqd_set_prio_tc_map(dev, count - 1);
7217
7218         rc = netif_set_real_num_tx_queues(dev, count);
7219
7220         if (rc && IS_IQD(card))
7221                 qeth_iqd_set_prio_tc_map(dev, dev->real_num_tx_queues - 1);
7222
7223         return rc;
7224 }
7225 EXPORT_SYMBOL_GPL(qeth_set_real_num_tx_queues);
7226
7227 u16 qeth_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
7228                           u8 cast_type, struct net_device *sb_dev)
7229 {
7230         u16 txq;
7231
7232         if (cast_type != RTN_UNICAST)
7233                 return QETH_IQD_MCAST_TXQ;
7234         if (dev->real_num_tx_queues == QETH_IQD_MIN_TXQ)
7235                 return QETH_IQD_MIN_UCAST_TXQ;
7236
7237         txq = netdev_pick_tx(dev, skb, sb_dev);
7238         return (txq == QETH_IQD_MCAST_TXQ) ? QETH_IQD_MIN_UCAST_TXQ : txq;
7239 }
7240 EXPORT_SYMBOL_GPL(qeth_iqd_select_queue);
7241
7242 int qeth_open(struct net_device *dev)
7243 {
7244         struct qeth_card *card = dev->ml_priv;
7245
7246         QETH_CARD_TEXT(card, 4, "qethopen");
7247
7248         card->data.state = CH_STATE_UP;
7249         netif_tx_start_all_queues(dev);
7250
7251         napi_enable(&card->napi);
7252         local_bh_disable();
7253         napi_schedule(&card->napi);
7254         if (IS_IQD(card)) {
7255                 struct qeth_qdio_out_q *queue;
7256                 unsigned int i;
7257
7258                 qeth_for_each_output_queue(card, queue, i) {
7259                         netif_tx_napi_add(dev, &queue->napi, qeth_tx_poll,
7260                                           QETH_NAPI_WEIGHT);
7261                         napi_enable(&queue->napi);
7262                         napi_schedule(&queue->napi);
7263                 }
7264         }
7265         /* kick-start the NAPI softirq: */
7266         local_bh_enable();
7267         return 0;
7268 }
7269 EXPORT_SYMBOL_GPL(qeth_open);
7270
7271 int qeth_stop(struct net_device *dev)
7272 {
7273         struct qeth_card *card = dev->ml_priv;
7274
7275         QETH_CARD_TEXT(card, 4, "qethstop");
7276         if (IS_IQD(card)) {
7277                 struct qeth_qdio_out_q *queue;
7278                 unsigned int i;
7279
7280                 /* Quiesce the NAPI instances: */
7281                 qeth_for_each_output_queue(card, queue, i)
7282                         napi_disable(&queue->napi);
7283
7284                 /* Stop .ndo_start_xmit, might still access queue->napi. */
7285                 netif_tx_disable(dev);
7286
7287                 qeth_for_each_output_queue(card, queue, i) {
7288                         del_timer_sync(&queue->timer);
7289                         /* Queues may get re-allocated, so remove the NAPIs. */
7290                         netif_napi_del(&queue->napi);
7291                 }
7292         } else {
7293                 netif_tx_disable(dev);
7294         }
7295
7296         napi_disable(&card->napi);
7297         cancel_delayed_work_sync(&card->buffer_reclaim_work);
7298         qdio_stop_irq(CARD_DDEV(card));
7299
7300         return 0;
7301 }
7302 EXPORT_SYMBOL_GPL(qeth_stop);
7303
7304 static int __init qeth_core_init(void)
7305 {
7306         int rc;
7307
7308         pr_info("loading core functions\n");
7309
7310         qeth_debugfs_root = debugfs_create_dir("qeth", NULL);
7311
7312         rc = qeth_register_dbf_views();
7313         if (rc)
7314                 goto dbf_err;
7315         qeth_core_root_dev = root_device_register("qeth");
7316         rc = PTR_ERR_OR_ZERO(qeth_core_root_dev);
7317         if (rc)
7318                 goto register_err;
7319         qeth_core_header_cache =
7320                 kmem_cache_create("qeth_hdr", QETH_HDR_CACHE_OBJ_SIZE,
7321                                   roundup_pow_of_two(QETH_HDR_CACHE_OBJ_SIZE),
7322                                   0, NULL);
7323         if (!qeth_core_header_cache) {
7324                 rc = -ENOMEM;
7325                 goto slab_err;
7326         }
7327         qeth_qdio_outbuf_cache = kmem_cache_create("qeth_buf",
7328                         sizeof(struct qeth_qdio_out_buffer), 0, 0, NULL);
7329         if (!qeth_qdio_outbuf_cache) {
7330                 rc = -ENOMEM;
7331                 goto cqslab_err;
7332         }
7333         rc = ccw_driver_register(&qeth_ccw_driver);
7334         if (rc)
7335                 goto ccw_err;
7336         rc = ccwgroup_driver_register(&qeth_core_ccwgroup_driver);
7337         if (rc)
7338                 goto ccwgroup_err;
7339
7340         return 0;
7341
7342 ccwgroup_err:
7343         ccw_driver_unregister(&qeth_ccw_driver);
7344 ccw_err:
7345         kmem_cache_destroy(qeth_qdio_outbuf_cache);
7346 cqslab_err:
7347         kmem_cache_destroy(qeth_core_header_cache);
7348 slab_err:
7349         root_device_unregister(qeth_core_root_dev);
7350 register_err:
7351         qeth_unregister_dbf_views();
7352 dbf_err:
7353         debugfs_remove_recursive(qeth_debugfs_root);
7354         pr_err("Initializing the qeth device driver failed\n");
7355         return rc;
7356 }
7357
7358 static void __exit qeth_core_exit(void)
7359 {
7360         qeth_clear_dbf_list();
7361         ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver);
7362         ccw_driver_unregister(&qeth_ccw_driver);
7363         kmem_cache_destroy(qeth_qdio_outbuf_cache);
7364         kmem_cache_destroy(qeth_core_header_cache);
7365         root_device_unregister(qeth_core_root_dev);
7366         qeth_unregister_dbf_views();
7367         debugfs_remove_recursive(qeth_debugfs_root);
7368         pr_info("core functions removed\n");
7369 }
7370
7371 module_init(qeth_core_init);
7372 module_exit(qeth_core_exit);
7373 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
7374 MODULE_DESCRIPTION("qeth core functions");
7375 MODULE_LICENSE("GPL");