drivers/s390/net/qeth_core_main.c

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