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