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