drivers/s390/net/qeth_core_main.c

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