drivers/s390/net/qeth_core_main.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *    Copyright IBM Corp. 2007, 2009
   4  *    Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
   5  *               Frank Pavlic <fpavlic@de.ibm.com>,
   6  *               Thomas Spatzier <tspat@de.ibm.com>,
   7  *               Frank Blaschka <frank.blaschka@de.ibm.com>
   8  */
   9
  10 #define KMSG_COMPONENT "qeth"
  11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  12
  13 #include <linux/compat.h>
  14 #include <linux/module.h>
  15 #include <linux/moduleparam.h>
  16 #include <linux/string.h>
  17 #include <linux/errno.h>
  18 #include <linux/kernel.h>
  19 #include <linux/log2.h>
  20 #include <linux/ip.h>
  21 #include <linux/tcp.h>
  22 #include <linux/mii.h>
  23 #include <linux/mm.h>
  24 #include <linux/kthread.h>
  25 #include <linux/slab.h>
  26 #include <linux/if_vlan.h>
  27 #include <linux/netdevice.h>
  28 #include <linux/netdev_features.h>
  29 #include <linux/rcutree.h>
  30 #include <linux/skbuff.h>
  31 #include <linux/vmalloc.h>
  32
  33 #include <net/iucv/af_iucv.h>
  34 #include <net/dsfield.h>
  35
  36 #include <asm/ebcdic.h>
  37 #include <asm/chpid.h>
  38 #include <asm/io.h>
  39 #include <asm/sysinfo.h>
  40 #include <asm/diag.h>
  41 #include <asm/cio.h>
  42 #include <asm/ccwdev.h>
  43 #include <asm/cpcmd.h>
  44
  45 #include "qeth_core.h"
  46
  47 struct qeth_dbf_info qeth_dbf[QETH_DBF_INFOS] = {
  48         /* define dbf - Name, Pages, Areas, Maxlen, Level, View, Handle */
  49         /*                   N  P  A    M  L  V                      H  */
  50         [QETH_DBF_SETUP] = {"qeth_setup",
  51                                 8, 1,   8, 5, &debug_hex_ascii_view, NULL},
  52         [QETH_DBF_MSG]   = {"qeth_msg", 8, 1, 11 * sizeof(long), 3,
  53                             &debug_sprintf_view, NULL},
  54         [QETH_DBF_CTRL]  = {"qeth_control",
  55                 8, 1, QETH_DBF_CTRL_LEN, 5, &debug_hex_ascii_view, NULL},
  56 };
  57 EXPORT_SYMBOL_GPL(qeth_dbf);
  58
  59 struct kmem_cache *qeth_core_header_cache;
  60 EXPORT_SYMBOL_GPL(qeth_core_header_cache);
  61 static struct kmem_cache *qeth_qdio_outbuf_cache;
  62
  63 static struct device *qeth_core_root_dev;
  64 static struct dentry *qeth_debugfs_root;
  65 static struct lock_class_key qdio_out_skb_queue_key;
  66
  67 static void qeth_issue_next_read_cb(struct qeth_card *card,
  68                                     struct qeth_cmd_buffer *iob,
  69                                     unsigned int data_length);
  70 static int qeth_qdio_establish(struct qeth_card *);
  71 static void qeth_free_qdio_queues(struct qeth_card *card);
  72 static void qeth_notify_skbs(struct qeth_qdio_out_q *queue,
  73                 struct qeth_qdio_out_buffer *buf,
  74                 enum iucv_tx_notify notification);
  75 static void qeth_tx_complete_buf(struct qeth_qdio_out_buffer *buf, bool error,
  76                                  int budget);
  77 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *, int);
  78
  79 static void qeth_close_dev_handler(struct work_struct *work)
  80 {
  81         struct qeth_card *card;
  82
  83         card = container_of(work, struct qeth_card, close_dev_work);
  84         QETH_CARD_TEXT(card, 2, "cldevhdl");
  85         ccwgroup_set_offline(card->gdev);
  86 }
  87
  88 static const char *qeth_get_cardname(struct qeth_card *card)
  89 {
  90         if (IS_VM_NIC(card)) {
  91                 switch (card->info.type) {
  92                 case QETH_CARD_TYPE_OSD:
  93                         return " Virtual NIC QDIO";
  94                 case QETH_CARD_TYPE_IQD:
  95                         return " Virtual NIC Hiper";
  96                 case QETH_CARD_TYPE_OSM:
  97                         return " Virtual NIC QDIO - OSM";
  98                 case QETH_CARD_TYPE_OSX:
  99                         return " Virtual NIC QDIO - OSX";
 100                 default:
 101                         return " unknown";
 102                 }
 103         } else {
 104                 switch (card->info.type) {
 105                 case QETH_CARD_TYPE_OSD:
 106                         return " OSD Express";
 107                 case QETH_CARD_TYPE_IQD:
 108                         return " HiperSockets";
 109                 case QETH_CARD_TYPE_OSN:
 110                         return " OSN QDIO";
 111                 case QETH_CARD_TYPE_OSM:
 112                         return " OSM QDIO";
 113                 case QETH_CARD_TYPE_OSX:
 114                         return " OSX QDIO";
 115                 default:
 116                         return " unknown";
 117                 }
 118         }
 119         return " n/a";
 120 }
 121
 122 /* max length to be returned: 14 */
 123 const char *qeth_get_cardname_short(struct qeth_card *card)
 124 {
 125         if (IS_VM_NIC(card)) {
 126                 switch (card->info.type) {
 127                 case QETH_CARD_TYPE_OSD:
 128                         return "Virt.NIC QDIO";
 129                 case QETH_CARD_TYPE_IQD:
 130                         return "Virt.NIC Hiper";
 131                 case QETH_CARD_TYPE_OSM:
 132                         return "Virt.NIC OSM";
 133                 case QETH_CARD_TYPE_OSX:
 134                         return "Virt.NIC OSX";
 135                 default:
 136                         return "unknown";
 137                 }
 138         } else {
 139                 switch (card->info.type) {
 140                 case QETH_CARD_TYPE_OSD:
 141                         switch (card->info.link_type) {
 142                         case QETH_LINK_TYPE_FAST_ETH:
 143                                 return "OSD_100";
 144                         case QETH_LINK_TYPE_HSTR:
 145                                 return "HSTR";
 146                         case QETH_LINK_TYPE_GBIT_ETH:
 147                                 return "OSD_1000";
 148                         case QETH_LINK_TYPE_10GBIT_ETH:
 149                                 return "OSD_10GIG";
 150                         case QETH_LINK_TYPE_25GBIT_ETH:
 151                                 return "OSD_25GIG";
 152                         case QETH_LINK_TYPE_LANE_ETH100:
 153                                 return "OSD_FE_LANE";
 154                         case QETH_LINK_TYPE_LANE_TR:
 155                                 return "OSD_TR_LANE";
 156                         case QETH_LINK_TYPE_LANE_ETH1000:
 157                                 return "OSD_GbE_LANE";
 158                         case QETH_LINK_TYPE_LANE:
 159                                 return "OSD_ATM_LANE";
 160                         default:
 161                                 return "OSD_Express";
 162                         }
 163                 case QETH_CARD_TYPE_IQD:
 164                         return "HiperSockets";
 165                 case QETH_CARD_TYPE_OSN:
 166                         return "OSN";
 167                 case QETH_CARD_TYPE_OSM:
 168                         return "OSM_1000";
 169                 case QETH_CARD_TYPE_OSX:
 170                         return "OSX_10GIG";
 171                 default:
 172                         return "unknown";
 173                 }
 174         }
 175         return "n/a";
 176 }
 177
 178 void qeth_set_allowed_threads(struct qeth_card *card, unsigned long threads,
 179                          int clear_start_mask)
 180 {
 181         unsigned long flags;
 182
 183         spin_lock_irqsave(&card->thread_mask_lock, flags);
 184         card->thread_allowed_mask = threads;
 185         if (clear_start_mask)
 186                 card->thread_start_mask &= threads;
 187         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 188         wake_up(&card->wait_q);
 189 }
 190 EXPORT_SYMBOL_GPL(qeth_set_allowed_threads);
 191
 192 int qeth_threads_running(struct qeth_card *card, unsigned long threads)
 193 {
 194         unsigned long flags;
 195         int rc = 0;
 196
 197         spin_lock_irqsave(&card->thread_mask_lock, flags);
 198         rc = (card->thread_running_mask & threads);
 199         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 200         return rc;
 201 }
 202 EXPORT_SYMBOL_GPL(qeth_threads_running);
 203
 204 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 bool qeth_is_supported_link_type(struct qeth_card *card, u8 link_type)
2440 {
2441         if (link_type == QETH_LINK_TYPE_LANE_TR ||
2442             link_type == QETH_LINK_TYPE_HSTR) {
2443                 dev_err(&card->gdev->dev, "Unsupported Token Ring device\n");
2444                 return false;
2445         }
2446
2447         return true;
2448 }
2449
2450 static int qeth_update_max_mtu(struct qeth_card *card, unsigned int max_mtu)
2451 {
2452         struct net_device *dev = card->dev;
2453         unsigned int new_mtu;
2454
2455         if (!max_mtu) {
2456                 /* IQD needs accurate max MTU to set up its RX buffers: */
2457                 if (IS_IQD(card))
2458                         return -EINVAL;
2459                 /* tolerate quirky HW: */
2460                 max_mtu = ETH_MAX_MTU;
2461         }
2462
2463         rtnl_lock();
2464         if (IS_IQD(card)) {
2465                 /* move any device with default MTU to new max MTU: */
2466                 new_mtu = (dev->mtu == dev->max_mtu) ? max_mtu : dev->mtu;
2467
2468                 /* adjust RX buffer size to new max MTU: */
2469                 card->qdio.in_buf_size = max_mtu + 2 * PAGE_SIZE;
2470                 if (dev->max_mtu && dev->max_mtu != max_mtu)
2471                         qeth_free_qdio_queues(card);
2472         } else {
2473                 if (dev->mtu)
2474                         new_mtu = dev->mtu;
2475                 /* default MTUs for first setup: */
2476                 else if (IS_LAYER2(card))
2477                         new_mtu = ETH_DATA_LEN;
2478                 else
2479                         new_mtu = ETH_DATA_LEN - 8; /* allow for LLC + SNAP */
2480         }
2481
2482         dev->max_mtu = max_mtu;
2483         dev->mtu = min(new_mtu, max_mtu);
2484         rtnl_unlock();
2485         return 0;
2486 }
2487
2488 static int qeth_get_mtu_outof_framesize(int framesize)
2489 {
2490         switch (framesize) {
2491         case 0x4000:
2492                 return 8192;
2493         case 0x6000:
2494                 return 16384;
2495         case 0xa000:
2496                 return 32768;
2497         case 0xffff:
2498                 return 57344;
2499         default:
2500                 return 0;
2501         }
2502 }
2503
2504 static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2505                 unsigned long data)
2506 {
2507         __u16 mtu, framesize;
2508         __u16 len;
2509         struct qeth_cmd_buffer *iob;
2510         u8 link_type = 0;
2511
2512         QETH_CARD_TEXT(card, 2, "ulpenacb");
2513
2514         iob = (struct qeth_cmd_buffer *) data;
2515         memcpy(&card->token.ulp_filter_r,
2516                QETH_ULP_ENABLE_RESP_FILTER_TOKEN(iob->data),
2517                QETH_MPC_TOKEN_LENGTH);
2518         if (IS_IQD(card)) {
2519                 memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2);
2520                 mtu = qeth_get_mtu_outof_framesize(framesize);
2521         } else {
2522                 mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data);
2523         }
2524         *(u16 *)reply->param = mtu;
2525
2526         memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2);
2527         if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) {
2528                 memcpy(&link_type,
2529                        QETH_ULP_ENABLE_RESP_LINK_TYPE(iob->data), 1);
2530                 if (!qeth_is_supported_link_type(card, link_type))
2531                         return -EPROTONOSUPPORT;
2532         }
2533
2534         card->info.link_type = link_type;
2535         QETH_CARD_TEXT_(card, 2, "link%d", card->info.link_type);
2536         return 0;
2537 }
2538
2539 static u8 qeth_mpc_select_prot_type(struct qeth_card *card)
2540 {
2541         if (IS_OSN(card))
2542                 return QETH_PROT_OSN2;
2543         return IS_LAYER2(card) ? QETH_PROT_LAYER2 : QETH_PROT_TCPIP;
2544 }
2545
2546 static int qeth_ulp_enable(struct qeth_card *card)
2547 {
2548         u8 prot_type = qeth_mpc_select_prot_type(card);
2549         struct qeth_cmd_buffer *iob;
2550         u16 max_mtu;
2551         int rc;
2552
2553         QETH_CARD_TEXT(card, 2, "ulpenabl");
2554
2555         iob = qeth_mpc_alloc_cmd(card, ULP_ENABLE, ULP_ENABLE_SIZE);
2556         if (!iob)
2557                 return -ENOMEM;
2558
2559         *(QETH_ULP_ENABLE_LINKNUM(iob->data)) = (u8) card->dev->dev_port;
2560         memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1);
2561         memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data),
2562                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2563         memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data),
2564                &card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH);
2565         rc = qeth_send_control_data(card, iob, qeth_ulp_enable_cb, &max_mtu);
2566         if (rc)
2567                 return rc;
2568         return qeth_update_max_mtu(card, max_mtu);
2569 }
2570
2571 static int qeth_ulp_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2572                 unsigned long data)
2573 {
2574         struct qeth_cmd_buffer *iob;
2575
2576         QETH_CARD_TEXT(card, 2, "ulpstpcb");
2577
2578         iob = (struct qeth_cmd_buffer *) data;
2579         memcpy(&card->token.ulp_connection_r,
2580                QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2581                QETH_MPC_TOKEN_LENGTH);
2582         if (!strncmp("00S", QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2583                      3)) {
2584                 QETH_CARD_TEXT(card, 2, "olmlimit");
2585                 dev_err(&card->gdev->dev, "A connection could not be "
2586                         "established because of an OLM limit\n");
2587                 return -EMLINK;
2588         }
2589         return 0;
2590 }
2591
2592 static int qeth_ulp_setup(struct qeth_card *card)
2593 {
2594         __u16 temp;
2595         struct qeth_cmd_buffer *iob;
2596         struct ccw_dev_id dev_id;
2597
2598         QETH_CARD_TEXT(card, 2, "ulpsetup");
2599
2600         iob = qeth_mpc_alloc_cmd(card, ULP_SETUP, ULP_SETUP_SIZE);
2601         if (!iob)
2602                 return -ENOMEM;
2603
2604         memcpy(QETH_ULP_SETUP_DEST_ADDR(iob->data),
2605                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2606         memcpy(QETH_ULP_SETUP_CONNECTION_TOKEN(iob->data),
2607                &card->token.ulp_connection_w, QETH_MPC_TOKEN_LENGTH);
2608         memcpy(QETH_ULP_SETUP_FILTER_TOKEN(iob->data),
2609                &card->token.ulp_filter_r, QETH_MPC_TOKEN_LENGTH);
2610
2611         ccw_device_get_id(CARD_DDEV(card), &dev_id);
2612         memcpy(QETH_ULP_SETUP_CUA(iob->data), &dev_id.devno, 2);
2613         temp = (card->info.cula << 8) + card->info.unit_addr2;
2614         memcpy(QETH_ULP_SETUP_REAL_DEVADDR(iob->data), &temp, 2);
2615         return qeth_send_control_data(card, iob, qeth_ulp_setup_cb, NULL);
2616 }
2617
2618 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *q, int bidx)
2619 {
2620         struct qeth_qdio_out_buffer *newbuf;
2621
2622         newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, GFP_ATOMIC);
2623         if (!newbuf)
2624                 return -ENOMEM;
2625
2626         newbuf->buffer = q->qdio_bufs[bidx];
2627         skb_queue_head_init(&newbuf->skb_list);
2628         lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key);
2629         newbuf->q = q;
2630         newbuf->next_pending = q->bufs[bidx];
2631         atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY);
2632         q->bufs[bidx] = newbuf;
2633         return 0;
2634 }
2635
2636 static void qeth_free_output_queue(struct qeth_qdio_out_q *q)
2637 {
2638         if (!q)
2639                 return;
2640
2641         qeth_drain_output_queue(q, true);
2642         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2643         kfree(q);
2644 }
2645
2646 static struct qeth_qdio_out_q *qeth_alloc_output_queue(void)
2647 {
2648         struct qeth_qdio_out_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
2649
2650         if (!q)
2651                 return NULL;
2652
2653         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
2654                 kfree(q);
2655                 return NULL;
2656         }
2657         return q;
2658 }
2659
2660 static void qeth_tx_completion_timer(struct timer_list *timer)
2661 {
2662         struct qeth_qdio_out_q *queue = from_timer(queue, timer, timer);
2663
2664         napi_schedule(&queue->napi);
2665         QETH_TXQ_STAT_INC(queue, completion_timer);
2666 }
2667
2668 static int qeth_alloc_qdio_queues(struct qeth_card *card)
2669 {
2670         int i, j;
2671
2672         QETH_CARD_TEXT(card, 2, "allcqdbf");
2673
2674         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED,
2675                 QETH_QDIO_ALLOCATED) != QETH_QDIO_UNINITIALIZED)
2676                 return 0;
2677
2678         QETH_CARD_TEXT(card, 2, "inq");
2679         card->qdio.in_q = qeth_alloc_qdio_queue();
2680         if (!card->qdio.in_q)
2681                 goto out_nomem;
2682
2683         /* inbound buffer pool */
2684         if (qeth_alloc_buffer_pool(card))
2685                 goto out_freeinq;
2686
2687         /* outbound */
2688         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2689                 struct qeth_qdio_out_q *queue;
2690
2691                 queue = qeth_alloc_output_queue();
2692                 if (!queue)
2693                         goto out_freeoutq;
2694                 QETH_CARD_TEXT_(card, 2, "outq %i", i);
2695                 QETH_CARD_HEX(card, 2, &queue, sizeof(void *));
2696                 card->qdio.out_qs[i] = queue;
2697                 queue->card = card;
2698                 queue->queue_no = i;
2699                 timer_setup(&queue->timer, qeth_tx_completion_timer, 0);
2700                 queue->coalesce_usecs = QETH_TX_COALESCE_USECS;
2701                 queue->max_coalesced_frames = QETH_TX_MAX_COALESCED_FRAMES;
2702
2703                 /* give outbound qeth_qdio_buffers their qdio_buffers */
2704                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2705                         WARN_ON(queue->bufs[j]);
2706                         if (qeth_init_qdio_out_buf(queue, j))
2707                                 goto out_freeoutqbufs;
2708                 }
2709         }
2710
2711         /* completion */
2712         if (qeth_alloc_cq(card))
2713                 goto out_freeoutq;
2714
2715         return 0;
2716
2717 out_freeoutqbufs:
2718         while (j > 0) {
2719                 --j;
2720                 kmem_cache_free(qeth_qdio_outbuf_cache,
2721                                 card->qdio.out_qs[i]->bufs[j]);
2722                 card->qdio.out_qs[i]->bufs[j] = NULL;
2723         }
2724 out_freeoutq:
2725         while (i > 0) {
2726                 qeth_free_output_queue(card->qdio.out_qs[--i]);
2727                 card->qdio.out_qs[i] = NULL;
2728         }
2729         qeth_free_buffer_pool(card);
2730 out_freeinq:
2731         qeth_free_qdio_queue(card->qdio.in_q);
2732         card->qdio.in_q = NULL;
2733 out_nomem:
2734         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
2735         return -ENOMEM;
2736 }
2737
2738 static void qeth_free_qdio_queues(struct qeth_card *card)
2739 {
2740         int i, j;
2741
2742         if (atomic_xchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED) ==
2743                 QETH_QDIO_UNINITIALIZED)
2744                 return;
2745
2746         qeth_free_cq(card);
2747         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2748                 if (card->qdio.in_q->bufs[j].rx_skb)
2749                         dev_kfree_skb_any(card->qdio.in_q->bufs[j].rx_skb);
2750         }
2751         qeth_free_qdio_queue(card->qdio.in_q);
2752         card->qdio.in_q = NULL;
2753         /* inbound buffer pool */
2754         qeth_free_buffer_pool(card);
2755         /* free outbound qdio_qs */
2756         for (i = 0; i < card->qdio.no_out_queues; i++) {
2757                 qeth_free_output_queue(card->qdio.out_qs[i]);
2758                 card->qdio.out_qs[i] = NULL;
2759         }
2760 }
2761
2762 static void qeth_create_qib_param_field(struct qeth_card *card,
2763                 char *param_field)
2764 {
2765
2766         param_field[0] = _ascebc['P'];
2767         param_field[1] = _ascebc['C'];
2768         param_field[2] = _ascebc['I'];
2769         param_field[3] = _ascebc['T'];
2770         *((unsigned int *) (&param_field[4])) = QETH_PCI_THRESHOLD_A(card);
2771         *((unsigned int *) (&param_field[8])) = QETH_PCI_THRESHOLD_B(card);
2772         *((unsigned int *) (&param_field[12])) = QETH_PCI_TIMER_VALUE(card);
2773 }
2774
2775 static void qeth_create_qib_param_field_blkt(struct qeth_card *card,
2776                 char *param_field)
2777 {
2778         param_field[16] = _ascebc['B'];
2779         param_field[17] = _ascebc['L'];
2780         param_field[18] = _ascebc['K'];
2781         param_field[19] = _ascebc['T'];
2782         *((unsigned int *) (&param_field[20])) = card->info.blkt.time_total;
2783         *((unsigned int *) (&param_field[24])) = card->info.blkt.inter_packet;
2784         *((unsigned int *) (&param_field[28])) =
2785                 card->info.blkt.inter_packet_jumbo;
2786 }
2787
2788 static int qeth_qdio_activate(struct qeth_card *card)
2789 {
2790         QETH_CARD_TEXT(card, 3, "qdioact");
2791         return qdio_activate(CARD_DDEV(card));
2792 }
2793
2794 static int qeth_dm_act(struct qeth_card *card)
2795 {
2796         struct qeth_cmd_buffer *iob;
2797
2798         QETH_CARD_TEXT(card, 2, "dmact");
2799
2800         iob = qeth_mpc_alloc_cmd(card, DM_ACT, DM_ACT_SIZE);
2801         if (!iob)
2802                 return -ENOMEM;
2803
2804         memcpy(QETH_DM_ACT_DEST_ADDR(iob->data),
2805                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2806         memcpy(QETH_DM_ACT_CONNECTION_TOKEN(iob->data),
2807                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2808         return qeth_send_control_data(card, iob, NULL, NULL);
2809 }
2810
2811 static int qeth_mpc_initialize(struct qeth_card *card)
2812 {
2813         int rc;
2814
2815         QETH_CARD_TEXT(card, 2, "mpcinit");
2816
2817         rc = qeth_issue_next_read(card);
2818         if (rc) {
2819                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
2820                 return rc;
2821         }
2822         rc = qeth_cm_enable(card);
2823         if (rc) {
2824                 QETH_CARD_TEXT_(card, 2, "2err%d", rc);
2825                 return rc;
2826         }
2827         rc = qeth_cm_setup(card);
2828         if (rc) {
2829                 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
2830                 return rc;
2831         }
2832         rc = qeth_ulp_enable(card);
2833         if (rc) {
2834                 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
2835                 return rc;
2836         }
2837         rc = qeth_ulp_setup(card);
2838         if (rc) {
2839                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2840                 return rc;
2841         }
2842         rc = qeth_alloc_qdio_queues(card);
2843         if (rc) {
2844                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2845                 return rc;
2846         }
2847         rc = qeth_qdio_establish(card);
2848         if (rc) {
2849                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
2850                 qeth_free_qdio_queues(card);
2851                 return rc;
2852         }
2853         rc = qeth_qdio_activate(card);
2854         if (rc) {
2855                 QETH_CARD_TEXT_(card, 2, "7err%d", rc);
2856                 return rc;
2857         }
2858         rc = qeth_dm_act(card);
2859         if (rc) {
2860                 QETH_CARD_TEXT_(card, 2, "8err%d", rc);
2861                 return rc;
2862         }
2863
2864         return 0;
2865 }
2866
2867 void qeth_print_status_message(struct qeth_card *card)
2868 {
2869         switch (card->info.type) {
2870         case QETH_CARD_TYPE_OSD:
2871         case QETH_CARD_TYPE_OSM:
2872         case QETH_CARD_TYPE_OSX:
2873                 /* VM will use a non-zero first character
2874                  * to indicate a HiperSockets like reporting
2875                  * of the level OSA sets the first character to zero
2876                  * */
2877                 if (!card->info.mcl_level[0]) {
2878                         sprintf(card->info.mcl_level, "%02x%02x",
2879                                 card->info.mcl_level[2],
2880                                 card->info.mcl_level[3]);
2881                         break;
2882                 }
2883                 /* fallthrough */
2884         case QETH_CARD_TYPE_IQD:
2885                 if (IS_VM_NIC(card) || (card->info.mcl_level[0] & 0x80)) {
2886                         card->info.mcl_level[0] = (char) _ebcasc[(__u8)
2887                                 card->info.mcl_level[0]];
2888                         card->info.mcl_level[1] = (char) _ebcasc[(__u8)
2889                                 card->info.mcl_level[1]];
2890                         card->info.mcl_level[2] = (char) _ebcasc[(__u8)
2891                                 card->info.mcl_level[2]];
2892                         card->info.mcl_level[3] = (char) _ebcasc[(__u8)
2893                                 card->info.mcl_level[3]];
2894                         card->info.mcl_level[QETH_MCL_LENGTH] = 0;
2895                 }
2896                 break;
2897         default:
2898                 memset(&card->info.mcl_level[0], 0, QETH_MCL_LENGTH + 1);
2899         }
2900         dev_info(&card->gdev->dev,
2901                  "Device is a%s card%s%s%s\nwith link type %s.\n",
2902                  qeth_get_cardname(card),
2903                  (card->info.mcl_level[0]) ? " (level: " : "",
2904                  (card->info.mcl_level[0]) ? card->info.mcl_level : "",
2905                  (card->info.mcl_level[0]) ? ")" : "",
2906                  qeth_get_cardname_short(card));
2907 }
2908 EXPORT_SYMBOL_GPL(qeth_print_status_message);
2909
2910 static void qeth_initialize_working_pool_list(struct qeth_card *card)
2911 {
2912         struct qeth_buffer_pool_entry *entry;
2913
2914         QETH_CARD_TEXT(card, 5, "inwrklst");
2915
2916         list_for_each_entry(entry,
2917                             &card->qdio.init_pool.entry_list, init_list) {
2918                 qeth_put_buffer_pool_entry(card, entry);
2919         }
2920 }
2921
2922 static struct qeth_buffer_pool_entry *qeth_find_free_buffer_pool_entry(
2923                                         struct qeth_card *card)
2924 {
2925         struct qeth_buffer_pool_entry *entry;
2926         int i, free;
2927
2928         if (list_empty(&card->qdio.in_buf_pool.entry_list))
2929                 return NULL;
2930
2931         list_for_each_entry(entry, &card->qdio.in_buf_pool.entry_list, list) {
2932                 free = 1;
2933                 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2934                         if (page_count(entry->elements[i]) > 1) {
2935                                 free = 0;
2936                                 break;
2937                         }
2938                 }
2939                 if (free) {
2940                         list_del_init(&entry->list);
2941                         return entry;
2942                 }
2943         }
2944
2945         /* no free buffer in pool so take first one and swap pages */
2946         entry = list_first_entry(&card->qdio.in_buf_pool.entry_list,
2947                                  struct qeth_buffer_pool_entry, list);
2948         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2949                 if (page_count(entry->elements[i]) > 1) {
2950                         struct page *page = dev_alloc_page();
2951
2952                         if (!page)
2953                                 return NULL;
2954
2955                         __free_page(entry->elements[i]);
2956                         entry->elements[i] = page;
2957                         QETH_CARD_STAT_INC(card, rx_sg_alloc_page);
2958                 }
2959         }
2960         list_del_init(&entry->list);
2961         return entry;
2962 }
2963
2964 static int qeth_init_input_buffer(struct qeth_card *card,
2965                 struct qeth_qdio_buffer *buf)
2966 {
2967         struct qeth_buffer_pool_entry *pool_entry;
2968         int i;
2969
2970         if ((card->options.cq == QETH_CQ_ENABLED) && (!buf->rx_skb)) {
2971                 buf->rx_skb = netdev_alloc_skb(card->dev,
2972                                                ETH_HLEN +
2973                                                sizeof(struct ipv6hdr));
2974                 if (!buf->rx_skb)
2975                         return -ENOMEM;
2976         }
2977
2978         pool_entry = qeth_find_free_buffer_pool_entry(card);
2979         if (!pool_entry)
2980                 return -ENOBUFS;
2981
2982         /*
2983          * since the buffer is accessed only from the input_tasklet
2984          * there shouldn't be a need to synchronize; also, since we use
2985          * the QETH_IN_BUF_REQUEUE_THRESHOLD we should never run  out off
2986          * buffers
2987          */
2988
2989         buf->pool_entry = pool_entry;
2990         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2991                 buf->buffer->element[i].length = PAGE_SIZE;
2992                 buf->buffer->element[i].addr =
2993                         page_to_phys(pool_entry->elements[i]);
2994                 if (i == QETH_MAX_BUFFER_ELEMENTS(card) - 1)
2995                         buf->buffer->element[i].eflags = SBAL_EFLAGS_LAST_ENTRY;
2996                 else
2997                         buf->buffer->element[i].eflags = 0;
2998                 buf->buffer->element[i].sflags = 0;
2999         }
3000         return 0;
3001 }
3002
3003 static unsigned int qeth_tx_select_bulk_max(struct qeth_card *card,
3004                                             struct qeth_qdio_out_q *queue)
3005 {
3006         if (!IS_IQD(card) ||
3007             qeth_iqd_is_mcast_queue(card, queue) ||
3008             card->options.cq == QETH_CQ_ENABLED ||
3009             qdio_get_ssqd_desc(CARD_DDEV(card), &card->ssqd))
3010                 return 1;
3011
3012         return card->ssqd.mmwc ? card->ssqd.mmwc : 1;
3013 }
3014
3015 static int qeth_init_qdio_queues(struct qeth_card *card)
3016 {
3017         unsigned int i;
3018         int rc;
3019
3020         QETH_CARD_TEXT(card, 2, "initqdqs");
3021
3022         /* inbound queue */
3023         qdio_reset_buffers(card->qdio.in_q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
3024         memset(&card->rx, 0, sizeof(struct qeth_rx));
3025
3026         qeth_initialize_working_pool_list(card);
3027         /*give only as many buffers to hardware as we have buffer pool entries*/
3028         for (i = 0; i < card->qdio.in_buf_pool.buf_count - 1; i++) {
3029                 rc = qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]);
3030                 if (rc)
3031                         return rc;
3032         }
3033
3034         card->qdio.in_q->next_buf_to_init =
3035                 card->qdio.in_buf_pool.buf_count - 1;
3036         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0, 0,
3037                      card->qdio.in_buf_pool.buf_count - 1);
3038         if (rc) {
3039                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
3040                 return rc;
3041         }
3042
3043         /* completion */
3044         rc = qeth_cq_init(card);
3045         if (rc) {
3046                 return rc;
3047         }
3048
3049         /* outbound queue */
3050         for (i = 0; i < card->qdio.no_out_queues; ++i) {
3051                 struct qeth_qdio_out_q *queue = card->qdio.out_qs[i];
3052
3053                 qdio_reset_buffers(queue->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
3054                 queue->max_elements = QETH_MAX_BUFFER_ELEMENTS(card);
3055                 queue->next_buf_to_fill = 0;
3056                 queue->do_pack = 0;
3057                 queue->prev_hdr = NULL;
3058                 queue->coalesced_frames = 0;
3059                 queue->bulk_start = 0;
3060                 queue->bulk_count = 0;
3061                 queue->bulk_max = qeth_tx_select_bulk_max(card, queue);
3062                 atomic_set(&queue->used_buffers, 0);
3063                 atomic_set(&queue->set_pci_flags_count, 0);
3064                 atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
3065                 netdev_tx_reset_queue(netdev_get_tx_queue(card->dev, i));
3066         }
3067         return 0;
3068 }
3069
3070 static void qeth_ipa_finalize_cmd(struct qeth_card *card,
3071                                   struct qeth_cmd_buffer *iob)
3072 {
3073         qeth_mpc_finalize_cmd(card, iob);
3074
3075         /* override with IPA-specific values: */
3076         __ipa_cmd(iob)->hdr.seqno = card->seqno.ipa++;
3077 }
3078
3079 void qeth_prepare_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
3080                           u16 cmd_length,
3081                           bool (*match)(struct qeth_cmd_buffer *iob,
3082                                         struct qeth_cmd_buffer *reply))
3083 {
3084         u8 prot_type = qeth_mpc_select_prot_type(card);
3085         u16 total_length = iob->length;
3086
3087         qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, total_length,
3088                        iob->data);
3089         iob->finalize = qeth_ipa_finalize_cmd;
3090         iob->match = match;
3091
3092         memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
3093         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &total_length, 2);
3094         memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1);
3095         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &cmd_length, 2);
3096         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &cmd_length, 2);
3097         memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
3098                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
3099         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &cmd_length, 2);
3100 }
3101 EXPORT_SYMBOL_GPL(qeth_prepare_ipa_cmd);
3102
3103 static bool qeth_ipa_match_reply(struct qeth_cmd_buffer *iob,
3104                                  struct qeth_cmd_buffer *reply)
3105 {
3106         struct qeth_ipa_cmd *ipa_reply = __ipa_reply(reply);
3107
3108         return ipa_reply && (__ipa_cmd(iob)->hdr.seqno == ipa_reply->hdr.seqno);
3109 }
3110
3111 struct qeth_cmd_buffer *qeth_ipa_alloc_cmd(struct qeth_card *card,
3112                                            enum qeth_ipa_cmds cmd_code,
3113                                            enum qeth_prot_versions prot,
3114                                            unsigned int data_length)
3115 {
3116         struct qeth_cmd_buffer *iob;
3117         struct qeth_ipacmd_hdr *hdr;
3118
3119         data_length += offsetof(struct qeth_ipa_cmd, data);
3120         iob = qeth_alloc_cmd(&card->write, IPA_PDU_HEADER_SIZE + data_length, 1,
3121                              QETH_IPA_TIMEOUT);
3122         if (!iob)
3123                 return NULL;
3124
3125         qeth_prepare_ipa_cmd(card, iob, data_length, qeth_ipa_match_reply);
3126
3127         hdr = &__ipa_cmd(iob)->hdr;
3128         hdr->command = cmd_code;
3129         hdr->initiator = IPA_CMD_INITIATOR_HOST;
3130         /* hdr->seqno is set by qeth_send_control_data() */
3131         hdr->adapter_type = QETH_LINK_TYPE_FAST_ETH;
3132         hdr->rel_adapter_no = (u8) card->dev->dev_port;
3133         hdr->prim_version_no = IS_LAYER2(card) ? 2 : 1;
3134         hdr->param_count = 1;
3135         hdr->prot_version = prot;
3136         return iob;
3137 }
3138 EXPORT_SYMBOL_GPL(qeth_ipa_alloc_cmd);
3139
3140 static int qeth_send_ipa_cmd_cb(struct qeth_card *card,
3141                                 struct qeth_reply *reply, unsigned long data)
3142 {
3143         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3144
3145         return (cmd->hdr.return_code) ? -EIO : 0;
3146 }
3147
3148 /**
3149  * qeth_send_ipa_cmd() - send an IPA command
3150  *
3151  * See qeth_send_control_data() for explanation of the arguments.
3152  */
3153
3154 int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
3155                 int (*reply_cb)(struct qeth_card *, struct qeth_reply*,
3156                         unsigned long),
3157                 void *reply_param)
3158 {
3159         int rc;
3160
3161         QETH_CARD_TEXT(card, 4, "sendipa");
3162
3163         if (card->read_or_write_problem) {
3164                 qeth_put_cmd(iob);
3165                 return -EIO;
3166         }
3167
3168         if (reply_cb == NULL)
3169                 reply_cb = qeth_send_ipa_cmd_cb;
3170         rc = qeth_send_control_data(card, iob, reply_cb, reply_param);
3171         if (rc == -ETIME) {
3172                 qeth_clear_ipacmd_list(card);
3173                 qeth_schedule_recovery(card);
3174         }
3175         return rc;
3176 }
3177 EXPORT_SYMBOL_GPL(qeth_send_ipa_cmd);
3178
3179 static int qeth_send_startlan_cb(struct qeth_card *card,
3180                                  struct qeth_reply *reply, unsigned long data)
3181 {
3182         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3183
3184         if (cmd->hdr.return_code == IPA_RC_LAN_OFFLINE)
3185                 return -ENETDOWN;
3186
3187         return (cmd->hdr.return_code) ? -EIO : 0;
3188 }
3189
3190 static int qeth_send_startlan(struct qeth_card *card)
3191 {
3192         struct qeth_cmd_buffer *iob;
3193
3194         QETH_CARD_TEXT(card, 2, "strtlan");
3195
3196         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_STARTLAN, QETH_PROT_NONE, 0);
3197         if (!iob)
3198                 return -ENOMEM;
3199         return qeth_send_ipa_cmd(card, iob, qeth_send_startlan_cb, NULL);
3200 }
3201
3202 static int qeth_setadpparms_inspect_rc(struct qeth_ipa_cmd *cmd)
3203 {
3204         if (!cmd->hdr.return_code)
3205                 cmd->hdr.return_code =
3206                         cmd->data.setadapterparms.hdr.return_code;
3207         return cmd->hdr.return_code;
3208 }
3209
3210 static int qeth_query_setadapterparms_cb(struct qeth_card *card,
3211                 struct qeth_reply *reply, unsigned long data)
3212 {
3213         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3214         struct qeth_query_cmds_supp *query_cmd;
3215
3216         QETH_CARD_TEXT(card, 3, "quyadpcb");
3217         if (qeth_setadpparms_inspect_rc(cmd))
3218                 return -EIO;
3219
3220         query_cmd = &cmd->data.setadapterparms.data.query_cmds_supp;
3221         if (query_cmd->lan_type & 0x7f) {
3222                 if (!qeth_is_supported_link_type(card, query_cmd->lan_type))
3223                         return -EPROTONOSUPPORT;
3224
3225                 card->info.link_type = query_cmd->lan_type;
3226                 QETH_CARD_TEXT_(card, 2, "lnk %d", card->info.link_type);
3227         }
3228
3229         card->options.adp.supported = query_cmd->supported_cmds;
3230         return 0;
3231 }
3232
3233 static struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card,
3234                                                     enum qeth_ipa_setadp_cmd adp_cmd,
3235                                                     unsigned int data_length)
3236 {
3237         struct qeth_ipacmd_setadpparms_hdr *hdr;
3238         struct qeth_cmd_buffer *iob;
3239
3240         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETADAPTERPARMS, QETH_PROT_IPV4,
3241                                  data_length +
3242                                  offsetof(struct qeth_ipacmd_setadpparms,
3243                                           data));
3244         if (!iob)
3245                 return NULL;
3246
3247         hdr = &__ipa_cmd(iob)->data.setadapterparms.hdr;
3248         hdr->cmdlength = sizeof(*hdr) + data_length;
3249         hdr->command_code = adp_cmd;
3250         hdr->used_total = 1;
3251         hdr->seq_no = 1;
3252         return iob;
3253 }
3254
3255 static int qeth_query_setadapterparms(struct qeth_card *card)
3256 {
3257         int rc;
3258         struct qeth_cmd_buffer *iob;
3259
3260         QETH_CARD_TEXT(card, 3, "queryadp");
3261         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_COMMANDS_SUPPORTED,
3262                                    SETADP_DATA_SIZEOF(query_cmds_supp));
3263         if (!iob)
3264                 return -ENOMEM;
3265         rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL);
3266         return rc;
3267 }
3268
3269 static int qeth_query_ipassists_cb(struct qeth_card *card,
3270                 struct qeth_reply *reply, unsigned long data)
3271 {
3272         struct qeth_ipa_cmd *cmd;
3273
3274         QETH_CARD_TEXT(card, 2, "qipasscb");
3275
3276         cmd = (struct qeth_ipa_cmd *) data;
3277
3278         switch (cmd->hdr.return_code) {
3279         case IPA_RC_SUCCESS:
3280                 break;
3281         case IPA_RC_NOTSUPP:
3282         case IPA_RC_L2_UNSUPPORTED_CMD:
3283                 QETH_CARD_TEXT(card, 2, "ipaunsup");
3284                 card->options.ipa4.supported |= IPA_SETADAPTERPARMS;
3285                 card->options.ipa6.supported |= IPA_SETADAPTERPARMS;
3286                 return -EOPNOTSUPP;
3287         default:
3288                 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Unhandled rc=%#x\n",
3289                                  CARD_DEVID(card), cmd->hdr.return_code);
3290                 return -EIO;
3291         }
3292
3293         if (cmd->hdr.prot_version == QETH_PROT_IPV4)
3294                 card->options.ipa4 = cmd->hdr.assists;
3295         else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
3296                 card->options.ipa6 = cmd->hdr.assists;
3297         else
3298                 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Flawed LIC detected\n",
3299                                  CARD_DEVID(card));
3300         return 0;
3301 }
3302
3303 static int qeth_query_ipassists(struct qeth_card *card,
3304                                 enum qeth_prot_versions prot)
3305 {
3306         int rc;
3307         struct qeth_cmd_buffer *iob;
3308
3309         QETH_CARD_TEXT_(card, 2, "qipassi%i", prot);
3310         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_QIPASSIST, prot, 0);
3311         if (!iob)
3312                 return -ENOMEM;
3313         rc = qeth_send_ipa_cmd(card, iob, qeth_query_ipassists_cb, NULL);
3314         return rc;
3315 }
3316
3317 static int qeth_query_switch_attributes_cb(struct qeth_card *card,
3318                                 struct qeth_reply *reply, unsigned long data)
3319 {
3320         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3321         struct qeth_query_switch_attributes *attrs;
3322         struct qeth_switch_info *sw_info;
3323
3324         QETH_CARD_TEXT(card, 2, "qswiatcb");
3325         if (qeth_setadpparms_inspect_rc(cmd))
3326                 return -EIO;
3327
3328         sw_info = (struct qeth_switch_info *)reply->param;
3329         attrs = &cmd->data.setadapterparms.data.query_switch_attributes;
3330         sw_info->capabilities = attrs->capabilities;
3331         sw_info->settings = attrs->settings;
3332         QETH_CARD_TEXT_(card, 2, "%04x%04x", sw_info->capabilities,
3333                         sw_info->settings);
3334         return 0;
3335 }
3336
3337 int qeth_query_switch_attributes(struct qeth_card *card,
3338                                  struct qeth_switch_info *sw_info)
3339 {
3340         struct qeth_cmd_buffer *iob;
3341
3342         QETH_CARD_TEXT(card, 2, "qswiattr");
3343         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES))
3344                 return -EOPNOTSUPP;
3345         if (!netif_carrier_ok(card->dev))
3346                 return -ENOMEDIUM;
3347         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES, 0);
3348         if (!iob)
3349                 return -ENOMEM;
3350         return qeth_send_ipa_cmd(card, iob,
3351                                 qeth_query_switch_attributes_cb, sw_info);
3352 }
3353
3354 struct qeth_cmd_buffer *qeth_get_diag_cmd(struct qeth_card *card,
3355                                           enum qeth_diags_cmds sub_cmd,
3356                                           unsigned int data_length)
3357 {
3358         struct qeth_ipacmd_diagass *cmd;
3359         struct qeth_cmd_buffer *iob;
3360
3361         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SET_DIAG_ASS, QETH_PROT_NONE,
3362                                  DIAG_HDR_LEN + data_length);
3363         if (!iob)
3364                 return NULL;
3365
3366         cmd = &__ipa_cmd(iob)->data.diagass;
3367         cmd->subcmd_len = DIAG_SUB_HDR_LEN + data_length;
3368         cmd->subcmd = sub_cmd;
3369         return iob;
3370 }
3371 EXPORT_SYMBOL_GPL(qeth_get_diag_cmd);
3372
3373 static int qeth_query_setdiagass_cb(struct qeth_card *card,
3374                 struct qeth_reply *reply, unsigned long data)
3375 {
3376         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3377         u16 rc = cmd->hdr.return_code;
3378
3379         if (rc) {
3380                 QETH_CARD_TEXT_(card, 2, "diagq:%x", rc);
3381                 return -EIO;
3382         }
3383
3384         card->info.diagass_support = cmd->data.diagass.ext;
3385         return 0;
3386 }
3387
3388 static int qeth_query_setdiagass(struct qeth_card *card)
3389 {
3390         struct qeth_cmd_buffer *iob;
3391
3392         QETH_CARD_TEXT(card, 2, "qdiagass");
3393         iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_QUERY, 0);
3394         if (!iob)
3395                 return -ENOMEM;
3396         return qeth_send_ipa_cmd(card, iob, qeth_query_setdiagass_cb, NULL);
3397 }
3398
3399 static void qeth_get_trap_id(struct qeth_card *card, struct qeth_trap_id *tid)
3400 {
3401         unsigned long info = get_zeroed_page(GFP_KERNEL);
3402         struct sysinfo_2_2_2 *info222 = (struct sysinfo_2_2_2 *)info;
3403         struct sysinfo_3_2_2 *info322 = (struct sysinfo_3_2_2 *)info;
3404         struct ccw_dev_id ccwid;
3405         int level;
3406
3407         tid->chpid = card->info.chpid;
3408         ccw_device_get_id(CARD_RDEV(card), &ccwid);
3409         tid->ssid = ccwid.ssid;
3410         tid->devno = ccwid.devno;
3411         if (!info)
3412                 return;
3413         level = stsi(NULL, 0, 0, 0);
3414         if ((level >= 2) && (stsi(info222, 2, 2, 2) == 0))
3415                 tid->lparnr = info222->lpar_number;
3416         if ((level >= 3) && (stsi(info322, 3, 2, 2) == 0)) {
3417                 EBCASC(info322->vm[0].name, sizeof(info322->vm[0].name));
3418                 memcpy(tid->vmname, info322->vm[0].name, sizeof(tid->vmname));
3419         }
3420         free_page(info);
3421         return;
3422 }
3423
3424 static int qeth_hw_trap_cb(struct qeth_card *card,
3425                 struct qeth_reply *reply, unsigned long data)
3426 {
3427         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3428         u16 rc = cmd->hdr.return_code;
3429
3430         if (rc) {
3431                 QETH_CARD_TEXT_(card, 2, "trapc:%x", rc);
3432                 return -EIO;
3433         }
3434         return 0;
3435 }
3436
3437 int qeth_hw_trap(struct qeth_card *card, enum qeth_diags_trap_action action)
3438 {
3439         struct qeth_cmd_buffer *iob;
3440         struct qeth_ipa_cmd *cmd;
3441
3442         QETH_CARD_TEXT(card, 2, "diagtrap");
3443         iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_TRAP, 64);
3444         if (!iob)
3445                 return -ENOMEM;
3446         cmd = __ipa_cmd(iob);
3447         cmd->data.diagass.type = 1;
3448         cmd->data.diagass.action = action;
3449         switch (action) {
3450         case QETH_DIAGS_TRAP_ARM:
3451                 cmd->data.diagass.options = 0x0003;
3452                 cmd->data.diagass.ext = 0x00010000 +
3453                         sizeof(struct qeth_trap_id);
3454                 qeth_get_trap_id(card,
3455                         (struct qeth_trap_id *)cmd->data.diagass.cdata);
3456                 break;
3457         case QETH_DIAGS_TRAP_DISARM:
3458                 cmd->data.diagass.options = 0x0001;
3459                 break;
3460         case QETH_DIAGS_TRAP_CAPTURE:
3461                 break;
3462         }
3463         return qeth_send_ipa_cmd(card, iob, qeth_hw_trap_cb, NULL);
3464 }
3465
3466 static int qeth_check_qdio_errors(struct qeth_card *card,
3467                                   struct qdio_buffer *buf,
3468                                   unsigned int qdio_error,
3469                                   const char *dbftext)
3470 {
3471         if (qdio_error) {
3472                 QETH_CARD_TEXT(card, 2, dbftext);
3473                 QETH_CARD_TEXT_(card, 2, " F15=%02X",
3474                                buf->element[15].sflags);
3475                 QETH_CARD_TEXT_(card, 2, " F14=%02X",
3476                                buf->element[14].sflags);
3477                 QETH_CARD_TEXT_(card, 2, " qerr=%X", qdio_error);
3478                 if ((buf->element[15].sflags) == 0x12) {
3479                         QETH_CARD_STAT_INC(card, rx_fifo_errors);
3480                         return 0;
3481                 } else
3482                         return 1;
3483         }
3484         return 0;
3485 }
3486
3487 static void qeth_queue_input_buffer(struct qeth_card *card, int index)
3488 {
3489         struct qeth_qdio_q *queue = card->qdio.in_q;
3490         struct list_head *lh;
3491         int count;
3492         int i;
3493         int rc;
3494         int newcount = 0;
3495
3496         count = (index < queue->next_buf_to_init)?
3497                 card->qdio.in_buf_pool.buf_count -
3498                 (queue->next_buf_to_init - index) :
3499                 card->qdio.in_buf_pool.buf_count -
3500                 (queue->next_buf_to_init + QDIO_MAX_BUFFERS_PER_Q - index);
3501         /* only requeue at a certain threshold to avoid SIGAs */
3502         if (count >= QETH_IN_BUF_REQUEUE_THRESHOLD(card)) {
3503                 for (i = queue->next_buf_to_init;
3504                      i < queue->next_buf_to_init + count; ++i) {
3505                         if (qeth_init_input_buffer(card,
3506                                 &queue->bufs[QDIO_BUFNR(i)])) {
3507                                 break;
3508                         } else {
3509                                 newcount++;
3510                         }
3511                 }
3512
3513                 if (newcount < count) {
3514                         /* we are in memory shortage so we switch back to
3515                            traditional skb allocation and drop packages */
3516                         atomic_set(&card->force_alloc_skb, 3);
3517                         count = newcount;
3518                 } else {
3519                         atomic_add_unless(&card->force_alloc_skb, -1, 0);
3520                 }
3521
3522                 if (!count) {
3523                         i = 0;
3524                         list_for_each(lh, &card->qdio.in_buf_pool.entry_list)
3525                                 i++;
3526                         if (i == card->qdio.in_buf_pool.buf_count) {
3527                                 QETH_CARD_TEXT(card, 2, "qsarbw");
3528                                 card->reclaim_index = index;
3529                                 schedule_delayed_work(
3530                                         &card->buffer_reclaim_work,
3531                                         QETH_RECLAIM_WORK_TIME);
3532                         }
3533                         return;
3534                 }
3535
3536                 /*
3537                  * according to old code it should be avoided to requeue all
3538                  * 128 buffers in order to benefit from PCI avoidance.
3539                  * this function keeps at least one buffer (the buffer at
3540                  * 'index') un-requeued -> this buffer is the first buffer that
3541                  * will be requeued the next time
3542                  */
3543                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0,
3544                              queue->next_buf_to_init, count);
3545                 if (rc) {
3546                         QETH_CARD_TEXT(card, 2, "qinberr");
3547                 }
3548                 queue->next_buf_to_init = QDIO_BUFNR(queue->next_buf_to_init +
3549                                                      count);
3550         }
3551 }
3552
3553 static void qeth_buffer_reclaim_work(struct work_struct *work)
3554 {
3555         struct qeth_card *card = container_of(work, struct qeth_card,
3556                 buffer_reclaim_work.work);
3557
3558         QETH_CARD_TEXT_(card, 2, "brw:%x", card->reclaim_index);
3559         qeth_queue_input_buffer(card, card->reclaim_index);
3560 }
3561
3562 static void qeth_handle_send_error(struct qeth_card *card,
3563                 struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err)
3564 {
3565         int sbalf15 = buffer->buffer->element[15].sflags;
3566
3567         QETH_CARD_TEXT(card, 6, "hdsnderr");
3568         qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr");
3569
3570         if (!qdio_err)
3571                 return;
3572
3573         if ((sbalf15 >= 15) && (sbalf15 <= 31))
3574                 return;
3575
3576         QETH_CARD_TEXT(card, 1, "lnkfail");
3577         QETH_CARD_TEXT_(card, 1, "%04x %02x",
3578                        (u16)qdio_err, (u8)sbalf15);
3579 }
3580
3581 /**
3582  * qeth_prep_flush_pack_buffer - Prepares flushing of a packing buffer.
3583  * @queue: queue to check for packing buffer
3584  *
3585  * Returns number of buffers that were prepared for flush.
3586  */
3587 static int qeth_prep_flush_pack_buffer(struct qeth_qdio_out_q *queue)
3588 {
3589         struct qeth_qdio_out_buffer *buffer;
3590
3591         buffer = queue->bufs[queue->next_buf_to_fill];
3592         if ((atomic_read(&buffer->state) == QETH_QDIO_BUF_EMPTY) &&
3593             (buffer->next_element_to_fill > 0)) {
3594                 /* it's a packing buffer */
3595                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3596                 queue->next_buf_to_fill =
3597                         QDIO_BUFNR(queue->next_buf_to_fill + 1);
3598                 return 1;
3599         }
3600         return 0;
3601 }
3602
3603 /*
3604  * Switched to packing state if the number of used buffers on a queue
3605  * reaches a certain limit.
3606  */
3607 static void qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q *queue)
3608 {
3609         if (!queue->do_pack) {
3610                 if (atomic_read(&queue->used_buffers)
3611                     >= QETH_HIGH_WATERMARK_PACK){
3612                         /* switch non-PACKING -> PACKING */
3613                         QETH_CARD_TEXT(queue->card, 6, "np->pack");
3614                         QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3615                         queue->do_pack = 1;
3616                 }
3617         }
3618 }
3619
3620 /*
3621  * Switches from packing to non-packing mode. If there is a packing
3622  * buffer on the queue this buffer will be prepared to be flushed.
3623  * In that case 1 is returned to inform the caller. If no buffer
3624  * has to be flushed, zero is returned.
3625  */
3626 static int qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q *queue)
3627 {
3628         if (queue->do_pack) {
3629                 if (atomic_read(&queue->used_buffers)
3630                     <= QETH_LOW_WATERMARK_PACK) {
3631                         /* switch PACKING -> non-PACKING */
3632                         QETH_CARD_TEXT(queue->card, 6, "pack->np");
3633                         QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3634                         queue->do_pack = 0;
3635                         return qeth_prep_flush_pack_buffer(queue);
3636                 }
3637         }
3638         return 0;
3639 }
3640
3641 static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
3642                                int count)
3643 {
3644         struct qeth_qdio_out_buffer *buf = queue->bufs[index];
3645         unsigned int qdio_flags = QDIO_FLAG_SYNC_OUTPUT;
3646         struct qeth_card *card = queue->card;
3647         int rc;
3648         int i;
3649
3650         for (i = index; i < index + count; ++i) {
3651                 unsigned int bidx = QDIO_BUFNR(i);
3652                 struct sk_buff *skb;
3653
3654                 buf = queue->bufs[bidx];
3655                 buf->buffer->element[buf->next_element_to_fill - 1].eflags |=
3656                                 SBAL_EFLAGS_LAST_ENTRY;
3657                 queue->coalesced_frames += buf->frames;
3658
3659                 if (queue->bufstates)
3660                         queue->bufstates[bidx].user = buf;
3661
3662                 if (IS_IQD(card)) {
3663                         skb_queue_walk(&buf->skb_list, skb)
3664                                 skb_tx_timestamp(skb);
3665                 }
3666         }
3667
3668         if (!IS_IQD(card)) {
3669                 if (!queue->do_pack) {
3670                         if ((atomic_read(&queue->used_buffers) >=
3671                                 (QETH_HIGH_WATERMARK_PACK -
3672                                  QETH_WATERMARK_PACK_FUZZ)) &&
3673                             !atomic_read(&queue->set_pci_flags_count)) {
3674                                 /* it's likely that we'll go to packing
3675                                  * mode soon */
3676                                 atomic_inc(&queue->set_pci_flags_count);
3677                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3678                         }
3679                 } else {
3680                         if (!atomic_read(&queue->set_pci_flags_count)) {
3681                                 /*
3682                                  * there's no outstanding PCI any more, so we
3683                                  * have to request a PCI to be sure the the PCI
3684                                  * will wake at some time in the future then we
3685                                  * can flush packed buffers that might still be
3686                                  * hanging around, which can happen if no
3687                                  * further send was requested by the stack
3688                                  */
3689                                 atomic_inc(&queue->set_pci_flags_count);
3690                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3691                         }
3692                 }
3693
3694                 if (atomic_read(&queue->set_pci_flags_count))
3695                         qdio_flags |= QDIO_FLAG_PCI_OUT;
3696         }
3697
3698         QETH_TXQ_STAT_INC(queue, doorbell);
3699         rc = do_QDIO(CARD_DDEV(queue->card), qdio_flags,
3700                      queue->queue_no, index, count);
3701
3702         /* Fake the TX completion interrupt: */
3703         if (IS_IQD(card)) {
3704                 unsigned int frames = READ_ONCE(queue->max_coalesced_frames);
3705                 unsigned int usecs = READ_ONCE(queue->coalesce_usecs);
3706
3707                 if (frames && queue->coalesced_frames >= frames) {
3708                         napi_schedule(&queue->napi);
3709                         queue->coalesced_frames = 0;
3710                         QETH_TXQ_STAT_INC(queue, coal_frames);
3711                 } else if (usecs) {
3712                         qeth_tx_arm_timer(queue, usecs);
3713                 }
3714         }
3715
3716         if (rc) {
3717                 /* ignore temporary SIGA errors without busy condition */
3718                 if (rc == -ENOBUFS)
3719                         return;
3720                 QETH_CARD_TEXT(queue->card, 2, "flushbuf");
3721                 QETH_CARD_TEXT_(queue->card, 2, " q%d", queue->queue_no);
3722                 QETH_CARD_TEXT_(queue->card, 2, " idx%d", index);
3723                 QETH_CARD_TEXT_(queue->card, 2, " c%d", count);
3724                 QETH_CARD_TEXT_(queue->card, 2, " err%d", rc);
3725
3726                 /* this must not happen under normal circumstances. if it
3727                  * happens something is really wrong -> recover */
3728                 qeth_schedule_recovery(queue->card);
3729                 return;
3730         }
3731 }
3732
3733 static void qeth_flush_queue(struct qeth_qdio_out_q *queue)
3734 {
3735         qeth_flush_buffers(queue, queue->bulk_start, queue->bulk_count);
3736
3737         queue->bulk_start = QDIO_BUFNR(queue->bulk_start + queue->bulk_count);
3738         queue->prev_hdr = NULL;
3739         queue->bulk_count = 0;
3740 }
3741
3742 static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue)
3743 {
3744         int index;
3745         int flush_cnt = 0;
3746         int q_was_packing = 0;
3747
3748         /*
3749          * check if weed have to switch to non-packing mode or if
3750          * we have to get a pci flag out on the queue
3751          */
3752         if ((atomic_read(&queue->used_buffers) <= QETH_LOW_WATERMARK_PACK) ||
3753             !atomic_read(&queue->set_pci_flags_count)) {
3754                 if (atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH) ==
3755                                 QETH_OUT_Q_UNLOCKED) {
3756                         /*
3757                          * If we get in here, there was no action in
3758                          * do_send_packet. So, we check if there is a
3759                          * packing buffer to be flushed here.
3760                          */
3761                         index = queue->next_buf_to_fill;
3762                         q_was_packing = queue->do_pack;
3763                         /* queue->do_pack may change */
3764                         barrier();
3765                         flush_cnt += qeth_switch_to_nonpacking_if_needed(queue);
3766                         if (!flush_cnt &&
3767                             !atomic_read(&queue->set_pci_flags_count))
3768                                 flush_cnt += qeth_prep_flush_pack_buffer(queue);
3769                         if (q_was_packing)
3770                                 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_cnt);
3771                         if (flush_cnt)
3772                                 qeth_flush_buffers(queue, index, flush_cnt);
3773                         atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
3774                 }
3775         }
3776 }
3777
3778 static void qeth_qdio_poll(struct ccw_device *cdev, unsigned long card_ptr)
3779 {
3780         struct qeth_card *card = (struct qeth_card *)card_ptr;
3781
3782         napi_schedule_irqoff(&card->napi);
3783 }
3784
3785 int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq)
3786 {
3787         int rc;
3788
3789         if (card->options.cq ==  QETH_CQ_NOTAVAILABLE) {
3790                 rc = -1;
3791                 goto out;
3792         } else {
3793                 if (card->options.cq == cq) {
3794                         rc = 0;
3795                         goto out;
3796                 }
3797
3798                 qeth_free_qdio_queues(card);
3799                 card->options.cq = cq;
3800                 rc = 0;
3801         }
3802 out:
3803         return rc;
3804
3805 }
3806 EXPORT_SYMBOL_GPL(qeth_configure_cq);
3807
3808 static void qeth_qdio_cq_handler(struct qeth_card *card, unsigned int qdio_err,
3809                                  unsigned int queue, int first_element,
3810                                  int count)
3811 {
3812         struct qeth_qdio_q *cq = card->qdio.c_q;
3813         int i;
3814         int rc;
3815
3816         QETH_CARD_TEXT_(card, 5, "qcqhe%d", first_element);
3817         QETH_CARD_TEXT_(card, 5, "qcqhc%d", count);
3818         QETH_CARD_TEXT_(card, 5, "qcqherr%d", qdio_err);
3819
3820         if (qdio_err) {
3821                 netif_tx_stop_all_queues(card->dev);
3822                 qeth_schedule_recovery(card);
3823                 return;
3824         }
3825
3826         for (i = first_element; i < first_element + count; ++i) {
3827                 struct qdio_buffer *buffer = cq->qdio_bufs[QDIO_BUFNR(i)];
3828                 int e = 0;
3829
3830                 while ((e < QDIO_MAX_ELEMENTS_PER_BUFFER) &&
3831                        buffer->element[e].addr) {
3832                         unsigned long phys_aob_addr = buffer->element[e].addr;
3833
3834                         qeth_qdio_handle_aob(card, phys_aob_addr);
3835                         ++e;
3836                 }
3837                 qeth_scrub_qdio_buffer(buffer, QDIO_MAX_ELEMENTS_PER_BUFFER);
3838         }
3839         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, queue,
3840                     card->qdio.c_q->next_buf_to_init,
3841                     count);
3842         if (rc) {
3843                 dev_warn(&card->gdev->dev,
3844                         "QDIO reported an error, rc=%i\n", rc);
3845                 QETH_CARD_TEXT(card, 2, "qcqherr");
3846         }
3847
3848         cq->next_buf_to_init = QDIO_BUFNR(cq->next_buf_to_init + count);
3849 }
3850
3851 static void qeth_qdio_input_handler(struct ccw_device *ccwdev,
3852                                     unsigned int qdio_err, int queue,
3853                                     int first_elem, int count,
3854                                     unsigned long card_ptr)
3855 {
3856         struct qeth_card *card = (struct qeth_card *)card_ptr;
3857
3858         QETH_CARD_TEXT_(card, 2, "qihq%d", queue);
3859         QETH_CARD_TEXT_(card, 2, "qiec%d", qdio_err);
3860
3861         if (qdio_err)
3862                 qeth_schedule_recovery(card);
3863 }
3864
3865 static void qeth_qdio_output_handler(struct ccw_device *ccwdev,
3866                                      unsigned int qdio_error, int __queue,
3867                                      int first_element, int count,
3868                                      unsigned long card_ptr)
3869 {
3870         struct qeth_card *card        = (struct qeth_card *) card_ptr;
3871         struct qeth_qdio_out_q *queue = card->qdio.out_qs[__queue];
3872         struct net_device *dev = card->dev;
3873         struct netdev_queue *txq;
3874         int i;
3875
3876         QETH_CARD_TEXT(card, 6, "qdouhdl");
3877         if (qdio_error & QDIO_ERROR_FATAL) {
3878                 QETH_CARD_TEXT(card, 2, "achkcond");
3879                 netif_tx_stop_all_queues(dev);
3880                 qeth_schedule_recovery(card);
3881                 return;
3882         }
3883
3884         for (i = first_element; i < (first_element + count); ++i) {
3885                 struct qeth_qdio_out_buffer *buf = queue->bufs[QDIO_BUFNR(i)];
3886
3887                 qeth_handle_send_error(card, buf, qdio_error);
3888                 qeth_clear_output_buffer(queue, buf, qdio_error, 0);
3889         }
3890
3891         atomic_sub(count, &queue->used_buffers);
3892         qeth_check_outbound_queue(queue);
3893
3894         txq = netdev_get_tx_queue(dev, __queue);
3895         /* xmit may have observed the full-condition, but not yet stopped the
3896          * txq. In which case the code below won't trigger. So before returning,
3897          * xmit will re-check the txq's fill level and wake it up if needed.
3898          */
3899         if (netif_tx_queue_stopped(txq) && !qeth_out_queue_is_full(queue))
3900                 netif_tx_wake_queue(txq);
3901 }
3902
3903 /**
3904  * Note: Function assumes that we have 4 outbound queues.
3905  */
3906 int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb)
3907 {
3908         struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
3909         u8 tos;
3910
3911         switch (card->qdio.do_prio_queueing) {
3912         case QETH_PRIO_Q_ING_TOS:
3913         case QETH_PRIO_Q_ING_PREC:
3914                 switch (qeth_get_ip_version(skb)) {
3915                 case 4:
3916                         tos = ipv4_get_dsfield(ip_hdr(skb));
3917                         break;
3918                 case 6:
3919                         tos = ipv6_get_dsfield(ipv6_hdr(skb));
3920                         break;
3921                 default:
3922                         return card->qdio.default_out_queue;
3923                 }
3924                 if (card->qdio.do_prio_queueing == QETH_PRIO_Q_ING_PREC)
3925                         return ~tos >> 6 & 3;
3926                 if (tos & IPTOS_MINCOST)
3927                         return 3;
3928                 if (tos & IPTOS_RELIABILITY)
3929                         return 2;
3930                 if (tos & IPTOS_THROUGHPUT)
3931                         return 1;
3932                 if (tos & IPTOS_LOWDELAY)
3933                         return 0;
3934                 break;
3935         case QETH_PRIO_Q_ING_SKB:
3936                 if (skb->priority > 5)
3937                         return 0;
3938                 return ~skb->priority >> 1 & 3;
3939         case QETH_PRIO_Q_ING_VLAN:
3940                 if (veth->h_vlan_proto == htons(ETH_P_8021Q))
3941                         return ~ntohs(veth->h_vlan_TCI) >>
3942                                (VLAN_PRIO_SHIFT + 1) & 3;
3943                 break;
3944         case QETH_PRIO_Q_ING_FIXED:
3945                 return card->qdio.default_out_queue;
3946         default:
3947                 break;
3948         }
3949         return card->qdio.default_out_queue;
3950 }
3951 EXPORT_SYMBOL_GPL(qeth_get_priority_queue);
3952
3953 /**
3954  * qeth_get_elements_for_frags() -      find number of SBALEs for skb frags.
3955  * @skb:                                SKB address
3956  *
3957  * Returns the number of pages, and thus QDIO buffer elements, needed to cover
3958  * fragmented part of the SKB. Returns zero for linear SKB.
3959  */
3960 static int qeth_get_elements_for_frags(struct sk_buff *skb)
3961 {
3962         int cnt, elements = 0;
3963
3964         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3965                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
3966
3967                 elements += qeth_get_elements_for_range(
3968                         (addr_t)skb_frag_address(frag),
3969                         (addr_t)skb_frag_address(frag) + skb_frag_size(frag));
3970         }
3971         return elements;
3972 }
3973
3974 /**
3975  * qeth_count_elements() -      Counts the number of QDIO buffer elements needed
3976  *                              to transmit an skb.
3977  * @skb:                        the skb to operate on.
3978  * @data_offset:                skip this part of the skb's linear data
3979  *
3980  * Returns the number of pages, and thus QDIO buffer elements, needed to map the
3981  * skb's data (both its linear part and paged fragments).
3982  */
3983 unsigned int qeth_count_elements(struct sk_buff *skb, unsigned int data_offset)
3984 {
3985         unsigned int elements = qeth_get_elements_for_frags(skb);
3986         addr_t end = (addr_t)skb->data + skb_headlen(skb);
3987         addr_t start = (addr_t)skb->data + data_offset;
3988
3989         if (start != end)
3990                 elements += qeth_get_elements_for_range(start, end);
3991         return elements;
3992 }
3993 EXPORT_SYMBOL_GPL(qeth_count_elements);
3994
3995 #define QETH_HDR_CACHE_OBJ_SIZE         (sizeof(struct qeth_hdr_tso) + \
3996                                          MAX_TCP_HEADER)
3997
3998 /**
3999  * qeth_add_hw_header() - add a HW header to an skb.
4000  * @skb: skb that the HW header should be added to.
4001  * @hdr: double pointer to a qeth_hdr. When returning with >= 0,
4002  *       it contains a valid pointer to a qeth_hdr.
4003  * @hdr_len: length of the HW header.
4004  * @proto_len: length of protocol headers that need to be in same page as the
4005  *             HW header.
4006  *
4007  * Returns the pushed length. If the header can't be pushed on
4008  * (eg. because it would cross a page boundary), it is allocated from
4009  * the cache instead and 0 is returned.
4010  * The number of needed buffer elements is returned in @elements.
4011  * Error to create the hdr is indicated by returning with < 0.
4012  */
4013 static int qeth_add_hw_header(struct qeth_qdio_out_q *queue,
4014                               struct sk_buff *skb, struct qeth_hdr **hdr,
4015                               unsigned int hdr_len, unsigned int proto_len,
4016                               unsigned int *elements)
4017 {
4018         gfp_t gfp = GFP_ATOMIC | (skb_pfmemalloc(skb) ? __GFP_MEMALLOC : 0);
4019         const unsigned int contiguous = proto_len ? proto_len : 1;
4020         const unsigned int max_elements = queue->max_elements;
4021         unsigned int __elements;
4022         addr_t start, end;
4023         bool push_ok;
4024         int rc;
4025
4026 check_layout:
4027         start = (addr_t)skb->data - hdr_len;
4028         end = (addr_t)skb->data;
4029
4030         if (qeth_get_elements_for_range(start, end + contiguous) == 1) {
4031                 /* Push HW header into same page as first protocol header. */
4032                 push_ok = true;
4033                 /* ... but TSO always needs a separate element for headers: */
4034                 if (skb_is_gso(skb))
4035                         __elements = 1 + qeth_count_elements(skb, proto_len);
4036                 else
4037                         __elements = qeth_count_elements(skb, 0);
4038         } else if (!proto_len && PAGE_ALIGNED(skb->data)) {
4039                 /* Push HW header into preceding page, flush with skb->data. */
4040                 push_ok = true;
4041                 __elements = 1 + qeth_count_elements(skb, 0);
4042         } else {
4043                 /* Use header cache, copy protocol headers up. */
4044                 push_ok = false;
4045                 __elements = 1 + qeth_count_elements(skb, proto_len);
4046         }
4047
4048         /* Compress skb to fit into one IO buffer: */
4049         if (__elements > max_elements) {
4050                 if (!skb_is_nonlinear(skb)) {
4051                         /* Drop it, no easy way of shrinking it further. */
4052                         QETH_DBF_MESSAGE(2, "Dropped an oversized skb (Max Elements=%u / Actual=%u / Length=%u).\n",
4053                                          max_elements, __elements, skb->len);
4054                         return -E2BIG;
4055                 }
4056
4057                 rc = skb_linearize(skb);
4058                 if (rc) {
4059                         QETH_TXQ_STAT_INC(queue, skbs_linearized_fail);
4060                         return rc;
4061                 }
4062
4063                 QETH_TXQ_STAT_INC(queue, skbs_linearized);
4064                 /* Linearization changed the layout, re-evaluate: */
4065                 goto check_layout;
4066         }
4067
4068         *elements = __elements;
4069         /* Add the header: */
4070         if (push_ok) {
4071                 *hdr = skb_push(skb, hdr_len);
4072                 return hdr_len;
4073         }
4074
4075         /* Fall back to cache element with known-good alignment: */
4076         if (hdr_len + proto_len > QETH_HDR_CACHE_OBJ_SIZE)
4077                 return -E2BIG;
4078         *hdr = kmem_cache_alloc(qeth_core_header_cache, gfp);
4079         if (!*hdr)
4080                 return -ENOMEM;
4081         /* Copy protocol headers behind HW header: */
4082         skb_copy_from_linear_data(skb, ((char *)*hdr) + hdr_len, proto_len);
4083         return 0;
4084 }
4085
4086 static bool qeth_iqd_may_bulk(struct qeth_qdio_out_q *queue,
4087                               struct sk_buff *curr_skb,
4088                               struct qeth_hdr *curr_hdr)
4089 {
4090         struct qeth_qdio_out_buffer *buffer = queue->bufs[queue->bulk_start];
4091         struct qeth_hdr *prev_hdr = queue->prev_hdr;
4092
4093         if (!prev_hdr)
4094                 return true;
4095
4096         /* All packets must have the same target: */
4097         if (curr_hdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER2) {
4098                 struct sk_buff *prev_skb = skb_peek(&buffer->skb_list);
4099
4100                 return ether_addr_equal(eth_hdr(prev_skb)->h_dest,
4101                                         eth_hdr(curr_skb)->h_dest) &&
4102                        qeth_l2_same_vlan(&prev_hdr->hdr.l2, &curr_hdr->hdr.l2);
4103         }
4104
4105         return qeth_l3_same_next_hop(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3) &&
4106                qeth_l3_iqd_same_vlan(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3);
4107 }
4108
4109 /**
4110  * qeth_fill_buffer() - map skb into an output buffer
4111  * @buf:        buffer to transport the skb
4112  * @skb:        skb to map into the buffer
4113  * @hdr:        qeth_hdr for this skb. Either at skb->data, or allocated
4114  *              from qeth_core_header_cache.
4115  * @offset:     when mapping the skb, start at skb->data + offset
4116  * @hd_len:     if > 0, build a dedicated header element of this size
4117  */
4118 static unsigned int qeth_fill_buffer(struct qeth_qdio_out_buffer *buf,
4119                                      struct sk_buff *skb, struct qeth_hdr *hdr,
4120                                      unsigned int offset, unsigned int hd_len)
4121 {
4122         struct qdio_buffer *buffer = buf->buffer;
4123         int element = buf->next_element_to_fill;
4124         int length = skb_headlen(skb) - offset;
4125         char *data = skb->data + offset;
4126         unsigned int elem_length, cnt;
4127         bool is_first_elem = true;
4128
4129         __skb_queue_tail(&buf->skb_list, skb);
4130
4131         /* build dedicated element for HW Header */
4132         if (hd_len) {
4133                 is_first_elem = false;
4134
4135                 buffer->element[element].addr = virt_to_phys(hdr);
4136                 buffer->element[element].length = hd_len;
4137                 buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
4138
4139                 /* HW header is allocated from cache: */
4140                 if ((void *)hdr != skb->data)
4141                         buf->is_header[element] = 1;
4142                 /* HW header was pushed and is contiguous with linear part: */
4143                 else if (length > 0 && !PAGE_ALIGNED(data) &&
4144                          (data == (char *)hdr + hd_len))
4145                         buffer->element[element].eflags |=
4146                                 SBAL_EFLAGS_CONTIGUOUS;
4147
4148                 element++;
4149         }
4150
4151         /* map linear part into buffer element(s) */
4152         while (length > 0) {
4153                 elem_length = min_t(unsigned int, length,
4154                                     PAGE_SIZE - offset_in_page(data));
4155
4156                 buffer->element[element].addr = virt_to_phys(data);
4157                 buffer->element[element].length = elem_length;
4158                 length -= elem_length;
4159                 if (is_first_elem) {
4160                         is_first_elem = false;
4161                         if (length || skb_is_nonlinear(skb))
4162                                 /* skb needs additional elements */
4163                                 buffer->element[element].eflags =
4164                                         SBAL_EFLAGS_FIRST_FRAG;
4165                         else
4166                                 buffer->element[element].eflags = 0;
4167                 } else {
4168                         buffer->element[element].eflags =
4169                                 SBAL_EFLAGS_MIDDLE_FRAG;
4170                 }
4171
4172                 data += elem_length;
4173                 element++;
4174         }
4175
4176         /* map page frags into buffer element(s) */
4177         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
4178                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
4179
4180                 data = skb_frag_address(frag);
4181                 length = skb_frag_size(frag);
4182                 while (length > 0) {
4183                         elem_length = min_t(unsigned int, length,
4184                                             PAGE_SIZE - offset_in_page(data));
4185
4186                         buffer->element[element].addr = virt_to_phys(data);
4187                         buffer->element[element].length = elem_length;
4188                         buffer->element[element].eflags =
4189                                 SBAL_EFLAGS_MIDDLE_FRAG;
4190
4191                         length -= elem_length;
4192                         data += elem_length;
4193                         element++;
4194                 }
4195         }
4196
4197         if (buffer->element[element - 1].eflags)
4198                 buffer->element[element - 1].eflags = SBAL_EFLAGS_LAST_FRAG;
4199         buf->next_element_to_fill = element;
4200         return element;
4201 }
4202
4203 static int __qeth_xmit(struct qeth_card *card, struct qeth_qdio_out_q *queue,
4204                        struct sk_buff *skb, unsigned int elements,
4205                        struct qeth_hdr *hdr, unsigned int offset,
4206                        unsigned int hd_len)
4207 {
4208         unsigned int bytes = qdisc_pkt_len(skb);
4209         struct qeth_qdio_out_buffer *buffer;
4210         unsigned int next_element;
4211         struct netdev_queue *txq;
4212         bool stopped = false;
4213         bool flush;
4214
4215         buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start + queue->bulk_count)];
4216         txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
4217
4218         /* Just a sanity check, the wake/stop logic should ensure that we always
4219          * get a free buffer.
4220          */
4221         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4222                 return -EBUSY;
4223
4224         flush = !qeth_iqd_may_bulk(queue, skb, hdr);
4225
4226         if (flush ||
4227             (buffer->next_element_to_fill + elements > queue->max_elements)) {
4228                 if (buffer->next_element_to_fill > 0) {
4229                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4230                         queue->bulk_count++;
4231                 }
4232
4233                 if (queue->bulk_count >= queue->bulk_max)
4234                         flush = true;
4235
4236                 if (flush)
4237                         qeth_flush_queue(queue);
4238
4239                 buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start +
4240                                                 queue->bulk_count)];
4241
4242                 /* Sanity-check again: */
4243                 if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4244                         return -EBUSY;
4245         }
4246
4247         if (buffer->next_element_to_fill == 0 &&
4248             atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
4249                 /* If a TX completion happens right _here_ and misses to wake
4250                  * the txq, then our re-check below will catch the race.
4251                  */
4252                 QETH_TXQ_STAT_INC(queue, stopped);
4253                 netif_tx_stop_queue(txq);
4254                 stopped = true;
4255         }
4256
4257         next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
4258         buffer->bytes += bytes;
4259         buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
4260         queue->prev_hdr = hdr;
4261
4262         flush = __netdev_tx_sent_queue(txq, bytes,
4263                                        !stopped && netdev_xmit_more());
4264
4265         if (flush || next_element >= queue->max_elements) {
4266                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4267                 queue->bulk_count++;
4268
4269                 if (queue->bulk_count >= queue->bulk_max)
4270                         flush = true;
4271
4272                 if (flush)
4273                         qeth_flush_queue(queue);
4274         }
4275
4276         if (stopped && !qeth_out_queue_is_full(queue))
4277                 netif_tx_start_queue(txq);
4278         return 0;
4279 }
4280
4281 int qeth_do_send_packet(struct qeth_card *card, struct qeth_qdio_out_q *queue,
4282                         struct sk_buff *skb, struct qeth_hdr *hdr,
4283                         unsigned int offset, unsigned int hd_len,
4284                         int elements_needed)
4285 {
4286         struct qeth_qdio_out_buffer *buffer;
4287         unsigned int next_element;
4288         struct netdev_queue *txq;
4289         bool stopped = false;
4290         int start_index;
4291         int flush_count = 0;
4292         int do_pack = 0;
4293         int tmp;
4294         int rc = 0;
4295
4296         /* spin until we get the queue ... */
4297         while (atomic_cmpxchg(&queue->state, QETH_OUT_Q_UNLOCKED,
4298                               QETH_OUT_Q_LOCKED) != QETH_OUT_Q_UNLOCKED);
4299         start_index = queue->next_buf_to_fill;
4300         buffer = queue->bufs[queue->next_buf_to_fill];
4301
4302         /* Just a sanity check, the wake/stop logic should ensure that we always
4303          * get a free buffer.
4304          */
4305         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY) {
4306                 atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
4307                 return -EBUSY;
4308         }
4309
4310         txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
4311
4312         /* check if we need to switch packing state of this queue */
4313         qeth_switch_to_packing_if_needed(queue);
4314         if (queue->do_pack) {
4315                 do_pack = 1;
4316                 /* does packet fit in current buffer? */
4317                 if (buffer->next_element_to_fill + elements_needed >
4318                     queue->max_elements) {
4319                         /* ... no -> set state PRIMED */
4320                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4321                         flush_count++;
4322                         queue->next_buf_to_fill =
4323                                 QDIO_BUFNR(queue->next_buf_to_fill + 1);
4324                         buffer = queue->bufs[queue->next_buf_to_fill];
4325
4326                         /* We stepped forward, so sanity-check again: */
4327                         if (atomic_read(&buffer->state) !=
4328                             QETH_QDIO_BUF_EMPTY) {
4329                                 qeth_flush_buffers(queue, start_index,
4330                                                            flush_count);
4331                                 atomic_set(&queue->state,
4332                                                 QETH_OUT_Q_UNLOCKED);
4333                                 rc = -EBUSY;
4334                                 goto out;
4335                         }
4336                 }
4337         }
4338
4339         if (buffer->next_element_to_fill == 0 &&
4340             atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
4341                 /* If a TX completion happens right _here_ and misses to wake
4342                  * the txq, then our re-check below will catch the race.
4343                  */
4344                 QETH_TXQ_STAT_INC(queue, stopped);
4345                 netif_tx_stop_queue(txq);
4346                 stopped = true;
4347         }
4348
4349         next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
4350         buffer->bytes += qdisc_pkt_len(skb);
4351         buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
4352
4353         if (queue->do_pack)
4354                 QETH_TXQ_STAT_INC(queue, skbs_pack);
4355         if (!queue->do_pack || stopped || next_element >= queue->max_elements) {
4356                 flush_count++;
4357                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4358                 queue->next_buf_to_fill =
4359                                 QDIO_BUFNR(queue->next_buf_to_fill + 1);
4360         }
4361
4362         if (flush_count)
4363                 qeth_flush_buffers(queue, start_index, flush_count);
4364         else if (!atomic_read(&queue->set_pci_flags_count))
4365                 atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH);
4366         /*
4367          * queue->state will go from LOCKED -> UNLOCKED or from
4368          * LOCKED_FLUSH -> LOCKED if output_handler wanted to 'notify' us
4369          * (switch packing state or flush buffer to get another pci flag out).
4370          * In that case we will enter this loop
4371          */
4372         while (atomic_dec_return(&queue->state)) {
4373                 start_index = queue->next_buf_to_fill;
4374                 /* check if we can go back to non-packing state */
4375                 tmp = qeth_switch_to_nonpacking_if_needed(queue);
4376                 /*
4377                  * check if we need to flush a packing buffer to get a pci
4378                  * flag out on the queue
4379                  */
4380                 if (!tmp && !atomic_read(&queue->set_pci_flags_count))
4381                         tmp = qeth_prep_flush_pack_buffer(queue);
4382                 if (tmp) {
4383                         qeth_flush_buffers(queue, start_index, tmp);
4384                         flush_count += tmp;
4385                 }
4386         }
4387 out:
4388         /* at this point the queue is UNLOCKED again */
4389         if (do_pack)
4390                 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_count);
4391
4392         if (stopped && !qeth_out_queue_is_full(queue))
4393                 netif_tx_start_queue(txq);
4394         return rc;
4395 }
4396 EXPORT_SYMBOL_GPL(qeth_do_send_packet);
4397
4398 static void qeth_fill_tso_ext(struct qeth_hdr_tso *hdr,
4399                               unsigned int payload_len, struct sk_buff *skb,
4400                               unsigned int proto_len)
4401 {
4402         struct qeth_hdr_ext_tso *ext = &hdr->ext;
4403
4404         ext->hdr_tot_len = sizeof(*ext);
4405         ext->imb_hdr_no = 1;
4406         ext->hdr_type = 1;
4407         ext->hdr_version = 1;
4408         ext->hdr_len = 28;
4409         ext->payload_len = payload_len;
4410         ext->mss = skb_shinfo(skb)->gso_size;
4411         ext->dg_hdr_len = proto_len;
4412 }
4413
4414 int qeth_xmit(struct qeth_card *card, struct sk_buff *skb,
4415               struct qeth_qdio_out_q *queue, int ipv,
4416               void (*fill_header)(struct qeth_qdio_out_q *queue,
4417                                   struct qeth_hdr *hdr, struct sk_buff *skb,
4418                                   int ipv, unsigned int data_len))
4419 {
4420         unsigned int proto_len, hw_hdr_len;
4421         unsigned int frame_len = skb->len;
4422         bool is_tso = skb_is_gso(skb);
4423         unsigned int data_offset = 0;
4424         struct qeth_hdr *hdr = NULL;
4425         unsigned int hd_len = 0;
4426         unsigned int elements;
4427         int push_len, rc;
4428
4429         if (is_tso) {
4430                 hw_hdr_len = sizeof(struct qeth_hdr_tso);
4431                 proto_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
4432         } else {
4433                 hw_hdr_len = sizeof(struct qeth_hdr);
4434                 proto_len = (IS_IQD(card) && IS_LAYER2(card)) ? ETH_HLEN : 0;
4435         }
4436
4437         rc = skb_cow_head(skb, hw_hdr_len);
4438         if (rc)
4439                 return rc;
4440
4441         push_len = qeth_add_hw_header(queue, skb, &hdr, hw_hdr_len, proto_len,
4442                                       &elements);
4443         if (push_len < 0)
4444                 return push_len;
4445         if (is_tso || !push_len) {
4446                 /* HW header needs its own buffer element. */
4447                 hd_len = hw_hdr_len + proto_len;
4448                 data_offset = push_len + proto_len;
4449         }
4450         memset(hdr, 0, hw_hdr_len);
4451         fill_header(queue, hdr, skb, ipv, frame_len);
4452         if (is_tso)
4453                 qeth_fill_tso_ext((struct qeth_hdr_tso *) hdr,
4454                                   frame_len - proto_len, skb, proto_len);
4455
4456         if (IS_IQD(card)) {
4457                 rc = __qeth_xmit(card, queue, skb, elements, hdr, data_offset,
4458                                  hd_len);
4459         } else {
4460                 /* TODO: drop skb_orphan() once TX completion is fast enough */
4461                 skb_orphan(skb);
4462                 rc = qeth_do_send_packet(card, queue, skb, hdr, data_offset,
4463                                          hd_len, elements);
4464         }
4465
4466         if (rc && !push_len)
4467                 kmem_cache_free(qeth_core_header_cache, hdr);
4468
4469         return rc;
4470 }
4471 EXPORT_SYMBOL_GPL(qeth_xmit);
4472
4473 static int qeth_setadp_promisc_mode_cb(struct qeth_card *card,
4474                 struct qeth_reply *reply, unsigned long data)
4475 {
4476         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4477         struct qeth_ipacmd_setadpparms *setparms;
4478
4479         QETH_CARD_TEXT(card, 4, "prmadpcb");
4480
4481         setparms = &(cmd->data.setadapterparms);
4482         if (qeth_setadpparms_inspect_rc(cmd)) {
4483                 QETH_CARD_TEXT_(card, 4, "prmrc%x", cmd->hdr.return_code);
4484                 setparms->data.mode = SET_PROMISC_MODE_OFF;
4485         }
4486         card->info.promisc_mode = setparms->data.mode;
4487         return (cmd->hdr.return_code) ? -EIO : 0;
4488 }
4489
4490 void qeth_setadp_promisc_mode(struct qeth_card *card, bool enable)
4491 {
4492         enum qeth_ipa_promisc_modes mode = enable ? SET_PROMISC_MODE_ON :
4493                                                     SET_PROMISC_MODE_OFF;
4494         struct qeth_cmd_buffer *iob;
4495         struct qeth_ipa_cmd *cmd;
4496
4497         QETH_CARD_TEXT(card, 4, "setprom");
4498         QETH_CARD_TEXT_(card, 4, "mode:%x", mode);
4499
4500         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE,
4501                                    SETADP_DATA_SIZEOF(mode));
4502         if (!iob)
4503                 return;
4504         cmd = __ipa_cmd(iob);
4505         cmd->data.setadapterparms.data.mode = mode;
4506         qeth_send_ipa_cmd(card, iob, qeth_setadp_promisc_mode_cb, NULL);
4507 }
4508 EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode);
4509
4510 static int qeth_setadpparms_change_macaddr_cb(struct qeth_card *card,
4511                 struct qeth_reply *reply, unsigned long data)
4512 {
4513         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4514         struct qeth_ipacmd_setadpparms *adp_cmd;
4515
4516         QETH_CARD_TEXT(card, 4, "chgmaccb");
4517         if (qeth_setadpparms_inspect_rc(cmd))
4518                 return -EIO;
4519
4520         adp_cmd = &cmd->data.setadapterparms;
4521         if (!is_valid_ether_addr(adp_cmd->data.change_addr.addr))
4522                 return -EADDRNOTAVAIL;
4523
4524         if (IS_LAYER2(card) && IS_OSD(card) && !IS_VM_NIC(card) &&
4525             !(adp_cmd->hdr.flags & QETH_SETADP_FLAGS_VIRTUAL_MAC))
4526                 return -EADDRNOTAVAIL;
4527
4528         ether_addr_copy(card->dev->dev_addr, adp_cmd->data.change_addr.addr);
4529         return 0;
4530 }
4531
4532 int qeth_setadpparms_change_macaddr(struct qeth_card *card)
4533 {
4534         int rc;
4535         struct qeth_cmd_buffer *iob;
4536         struct qeth_ipa_cmd *cmd;
4537
4538         QETH_CARD_TEXT(card, 4, "chgmac");
4539
4540         iob = qeth_get_adapter_cmd(card, IPA_SETADP_ALTER_MAC_ADDRESS,
4541                                    SETADP_DATA_SIZEOF(change_addr));
4542         if (!iob)
4543                 return -ENOMEM;
4544         cmd = __ipa_cmd(iob);
4545         cmd->data.setadapterparms.data.change_addr.cmd = CHANGE_ADDR_READ_MAC;
4546         cmd->data.setadapterparms.data.change_addr.addr_size = ETH_ALEN;
4547         ether_addr_copy(cmd->data.setadapterparms.data.change_addr.addr,
4548                         card->dev->dev_addr);
4549         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_change_macaddr_cb,
4550                                NULL);
4551         return rc;
4552 }
4553 EXPORT_SYMBOL_GPL(qeth_setadpparms_change_macaddr);
4554
4555 static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card,
4556                 struct qeth_reply *reply, unsigned long data)
4557 {
4558         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4559         struct qeth_set_access_ctrl *access_ctrl_req;
4560         int fallback = *(int *)reply->param;
4561
4562         QETH_CARD_TEXT(card, 4, "setaccb");
4563
4564         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4565         QETH_CARD_TEXT_(card, 2, "rc=%d",
4566                         cmd->data.setadapterparms.hdr.return_code);
4567         if (cmd->data.setadapterparms.hdr.return_code !=
4568                                                 SET_ACCESS_CTRL_RC_SUCCESS)
4569                 QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%#x) on device %x: %#x\n",
4570                                  access_ctrl_req->subcmd_code, CARD_DEVID(card),
4571                                  cmd->data.setadapterparms.hdr.return_code);
4572         switch (qeth_setadpparms_inspect_rc(cmd)) {
4573         case SET_ACCESS_CTRL_RC_SUCCESS:
4574                 if (card->options.isolation == ISOLATION_MODE_NONE) {
4575                         dev_info(&card->gdev->dev,
4576                             "QDIO data connection isolation is deactivated\n");
4577                 } else {
4578                         dev_info(&card->gdev->dev,
4579                             "QDIO data connection isolation is activated\n");
4580                 }
4581                 break;
4582         case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
4583                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already deactivated\n",
4584                                  CARD_DEVID(card));
4585                 if (fallback)
4586                         card->options.isolation = card->options.prev_isolation;
4587                 break;
4588         case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
4589                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already activated\n",
4590                                  CARD_DEVID(card));
4591                 if (fallback)
4592                         card->options.isolation = card->options.prev_isolation;
4593                 break;
4594         case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
4595                 dev_err(&card->gdev->dev, "Adapter does not "
4596                         "support QDIO data connection isolation\n");
4597                 break;
4598         case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
4599                 dev_err(&card->gdev->dev,
4600                         "Adapter is dedicated. "
4601                         "QDIO data connection isolation not supported\n");
4602                 if (fallback)
4603                         card->options.isolation = card->options.prev_isolation;
4604                 break;
4605         case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
4606                 dev_err(&card->gdev->dev,
4607                         "TSO does not permit QDIO data connection isolation\n");
4608                 if (fallback)
4609                         card->options.isolation = card->options.prev_isolation;
4610                 break;
4611         case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED:
4612                 dev_err(&card->gdev->dev, "The adjacent switch port does not "
4613                         "support reflective relay mode\n");
4614                 if (fallback)
4615                         card->options.isolation = card->options.prev_isolation;
4616                 break;
4617         case SET_ACCESS_CTRL_RC_REFLREL_FAILED:
4618                 dev_err(&card->gdev->dev, "The reflective relay mode cannot be "
4619                                         "enabled at the adjacent switch port");
4620                 if (fallback)
4621                         card->options.isolation = card->options.prev_isolation;
4622                 break;
4623         case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED:
4624                 dev_warn(&card->gdev->dev, "Turning off reflective relay mode "
4625                                         "at the adjacent switch failed\n");
4626                 break;
4627         default:
4628                 /* this should never happen */
4629                 if (fallback)
4630                         card->options.isolation = card->options.prev_isolation;
4631                 break;
4632         }
4633         return (cmd->hdr.return_code) ? -EIO : 0;
4634 }
4635
4636 static int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
4637                 enum qeth_ipa_isolation_modes isolation, int fallback)
4638 {
4639         int rc;
4640         struct qeth_cmd_buffer *iob;
4641         struct qeth_ipa_cmd *cmd;
4642         struct qeth_set_access_ctrl *access_ctrl_req;
4643
4644         QETH_CARD_TEXT(card, 4, "setacctl");
4645
4646         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL,
4647                                    SETADP_DATA_SIZEOF(set_access_ctrl));
4648         if (!iob)
4649                 return -ENOMEM;
4650         cmd = __ipa_cmd(iob);
4651         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4652         access_ctrl_req->subcmd_code = isolation;
4653
4654         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb,
4655                                &fallback);
4656         QETH_CARD_TEXT_(card, 2, "rc=%d", rc);
4657         return rc;
4658 }
4659
4660 int qeth_set_access_ctrl_online(struct qeth_card *card, int fallback)
4661 {
4662         int rc = 0;
4663
4664         QETH_CARD_TEXT(card, 4, "setactlo");
4665
4666         if ((IS_OSD(card) || IS_OSX(card)) &&
4667             qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) {
4668                 rc = qeth_setadpparms_set_access_ctrl(card,
4669                         card->options.isolation, fallback);
4670                 if (rc) {
4671                         QETH_DBF_MESSAGE(3, "IPA(SET_ACCESS_CTRL(%d) on device %x: sent failed\n",
4672                                          rc, CARD_DEVID(card));
4673                         rc = -EOPNOTSUPP;
4674                 }
4675         } else if (card->options.isolation != ISOLATION_MODE_NONE) {
4676                 card->options.isolation = ISOLATION_MODE_NONE;
4677
4678                 dev_err(&card->gdev->dev, "Adapter does not "
4679                         "support QDIO data connection isolation\n");
4680                 rc = -EOPNOTSUPP;
4681         }
4682         return rc;
4683 }
4684
4685 void qeth_tx_timeout(struct net_device *dev, unsigned int txqueue)
4686 {
4687         struct qeth_card *card;
4688
4689         card = dev->ml_priv;
4690         QETH_CARD_TEXT(card, 4, "txtimeo");
4691         qeth_schedule_recovery(card);
4692 }
4693 EXPORT_SYMBOL_GPL(qeth_tx_timeout);
4694
4695 static int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum)
4696 {
4697         struct qeth_card *card = dev->ml_priv;
4698         int rc = 0;
4699
4700         switch (regnum) {
4701         case MII_BMCR: /* Basic mode control register */
4702                 rc = BMCR_FULLDPLX;
4703                 if ((card->info.link_type != QETH_LINK_TYPE_GBIT_ETH) &&
4704                     (card->info.link_type != QETH_LINK_TYPE_OSN) &&
4705                     (card->info.link_type != QETH_LINK_TYPE_10GBIT_ETH) &&
4706                     (card->info.link_type != QETH_LINK_TYPE_25GBIT_ETH))
4707                         rc |= BMCR_SPEED100;
4708                 break;
4709         case MII_BMSR: /* Basic mode status register */
4710                 rc = BMSR_ERCAP | BMSR_ANEGCOMPLETE | BMSR_LSTATUS |
4711                      BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | BMSR_100FULL |
4712                      BMSR_100BASE4;
4713                 break;
4714         case MII_PHYSID1: /* PHYS ID 1 */
4715                 rc = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 8) |
4716                      dev->dev_addr[2];
4717                 rc = (rc >> 5) & 0xFFFF;
4718                 break;
4719         case MII_PHYSID2: /* PHYS ID 2 */
4720                 rc = (dev->dev_addr[2] << 10) & 0xFFFF;
4721                 break;
4722         case MII_ADVERTISE: /* Advertisement control reg */
4723                 rc = ADVERTISE_ALL;
4724                 break;
4725         case MII_LPA: /* Link partner ability reg */
4726                 rc = LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL |
4727                      LPA_100BASE4 | LPA_LPACK;
4728                 break;
4729         case MII_EXPANSION: /* Expansion register */
4730                 break;
4731         case MII_DCOUNTER: /* disconnect counter */
4732                 break;
4733         case MII_FCSCOUNTER: /* false carrier counter */
4734                 break;
4735         case MII_NWAYTEST: /* N-way auto-neg test register */
4736                 break;
4737         case MII_RERRCOUNTER: /* rx error counter */
4738                 rc = card->stats.rx_length_errors +
4739                      card->stats.rx_frame_errors +
4740                      card->stats.rx_fifo_errors;
4741                 break;
4742         case MII_SREVISION: /* silicon revision */
4743                 break;
4744         case MII_RESV1: /* reserved 1 */
4745                 break;
4746         case MII_LBRERROR: /* loopback, rx, bypass error */
4747                 break;
4748         case MII_PHYADDR: /* physical address */
4749                 break;
4750         case MII_RESV2: /* reserved 2 */
4751                 break;
4752         case MII_TPISTATUS: /* TPI status for 10mbps */
4753                 break;
4754         case MII_NCONFIG: /* network interface config */
4755                 break;
4756         default:
4757                 break;
4758         }
4759         return rc;
4760 }
4761
4762 static int qeth_snmp_command_cb(struct qeth_card *card,
4763                                 struct qeth_reply *reply, unsigned long data)
4764 {
4765         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4766         struct qeth_arp_query_info *qinfo = reply->param;
4767         struct qeth_ipacmd_setadpparms *adp_cmd;
4768         unsigned int data_len;
4769         void *snmp_data;
4770
4771         QETH_CARD_TEXT(card, 3, "snpcmdcb");
4772
4773         if (cmd->hdr.return_code) {
4774                 QETH_CARD_TEXT_(card, 4, "scer1%x", cmd->hdr.return_code);
4775                 return -EIO;
4776         }
4777         if (cmd->data.setadapterparms.hdr.return_code) {
4778                 cmd->hdr.return_code =
4779                         cmd->data.setadapterparms.hdr.return_code;
4780                 QETH_CARD_TEXT_(card, 4, "scer2%x", cmd->hdr.return_code);
4781                 return -EIO;
4782         }
4783
4784         adp_cmd = &cmd->data.setadapterparms;
4785         data_len = adp_cmd->hdr.cmdlength - sizeof(adp_cmd->hdr);
4786         if (adp_cmd->hdr.seq_no == 1) {
4787                 snmp_data = &adp_cmd->data.snmp;
4788         } else {
4789                 snmp_data = &adp_cmd->data.snmp.request;
4790                 data_len -= offsetof(struct qeth_snmp_cmd, request);
4791         }
4792
4793         /* check if there is enough room in userspace */
4794         if ((qinfo->udata_len - qinfo->udata_offset) < data_len) {
4795                 QETH_CARD_TEXT_(card, 4, "scer3%i", -ENOSPC);
4796                 return -ENOSPC;
4797         }
4798         QETH_CARD_TEXT_(card, 4, "snore%i",
4799                         cmd->data.setadapterparms.hdr.used_total);
4800         QETH_CARD_TEXT_(card, 4, "sseqn%i",
4801                         cmd->data.setadapterparms.hdr.seq_no);
4802         /*copy entries to user buffer*/
4803         memcpy(qinfo->udata + qinfo->udata_offset, snmp_data, data_len);
4804         qinfo->udata_offset += data_len;
4805
4806         if (cmd->data.setadapterparms.hdr.seq_no <
4807             cmd->data.setadapterparms.hdr.used_total)
4808                 return 1;
4809         return 0;
4810 }
4811
4812 static int qeth_snmp_command(struct qeth_card *card, char __user *udata)
4813 {
4814         struct qeth_snmp_ureq __user *ureq;
4815         struct qeth_cmd_buffer *iob;
4816         unsigned int req_len;
4817         struct qeth_arp_query_info qinfo = {0, };
4818         int rc = 0;
4819
4820         QETH_CARD_TEXT(card, 3, "snmpcmd");
4821
4822         if (IS_VM_NIC(card))
4823                 return -EOPNOTSUPP;
4824
4825         if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) &&
4826             IS_LAYER3(card))
4827                 return -EOPNOTSUPP;
4828
4829         ureq = (struct qeth_snmp_ureq __user *) udata;
4830         if (get_user(qinfo.udata_len, &ureq->hdr.data_len) ||
4831             get_user(req_len, &ureq->hdr.req_len))
4832                 return -EFAULT;
4833
4834         /* Sanitize user input, to avoid overflows in iob size calculation: */
4835         if (req_len > QETH_BUFSIZE)
4836                 return -EINVAL;
4837
4838         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL, req_len);
4839         if (!iob)
4840                 return -ENOMEM;
4841
4842         if (copy_from_user(&__ipa_cmd(iob)->data.setadapterparms.data.snmp,
4843                            &ureq->cmd, req_len)) {
4844                 qeth_put_cmd(iob);
4845                 return -EFAULT;
4846         }
4847
4848         qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
4849         if (!qinfo.udata) {
4850                 qeth_put_cmd(iob);
4851                 return -ENOMEM;
4852         }
4853         qinfo.udata_offset = sizeof(struct qeth_snmp_ureq_hdr);
4854
4855         rc = qeth_send_ipa_cmd(card, iob, qeth_snmp_command_cb, &qinfo);
4856         if (rc)
4857                 QETH_DBF_MESSAGE(2, "SNMP command failed on device %x: (%#x)\n",
4858                                  CARD_DEVID(card), rc);
4859         else {
4860                 if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
4861                         rc = -EFAULT;
4862         }
4863
4864         kfree(qinfo.udata);
4865         return rc;
4866 }
4867
4868 static int qeth_setadpparms_query_oat_cb(struct qeth_card *card,
4869                 struct qeth_reply *reply, unsigned long data)
4870 {
4871         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4872         struct qeth_qoat_priv *priv;
4873         char *resdata;
4874         int resdatalen;
4875
4876         QETH_CARD_TEXT(card, 3, "qoatcb");
4877         if (qeth_setadpparms_inspect_rc(cmd))
4878                 return -EIO;
4879
4880         priv = (struct qeth_qoat_priv *)reply->param;
4881         resdatalen = cmd->data.setadapterparms.hdr.cmdlength;
4882         resdata = (char *)data + 28;
4883
4884         if (resdatalen > (priv->buffer_len - priv->response_len))
4885                 return -ENOSPC;
4886
4887         memcpy((priv->buffer + priv->response_len), resdata,
4888                 resdatalen);
4889         priv->response_len += resdatalen;
4890
4891         if (cmd->data.setadapterparms.hdr.seq_no <
4892             cmd->data.setadapterparms.hdr.used_total)
4893                 return 1;
4894         return 0;
4895 }
4896
4897 static int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
4898 {
4899         int rc = 0;
4900         struct qeth_cmd_buffer *iob;
4901         struct qeth_ipa_cmd *cmd;
4902         struct qeth_query_oat *oat_req;
4903         struct qeth_query_oat_data oat_data;
4904         struct qeth_qoat_priv priv;
4905         void __user *tmp;
4906
4907         QETH_CARD_TEXT(card, 3, "qoatcmd");
4908
4909         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT)) {
4910                 rc = -EOPNOTSUPP;
4911                 goto out;
4912         }
4913
4914         if (copy_from_user(&oat_data, udata,
4915             sizeof(struct qeth_query_oat_data))) {
4916                         rc = -EFAULT;
4917                         goto out;
4918         }
4919
4920         priv.buffer_len = oat_data.buffer_len;
4921         priv.response_len = 0;
4922         priv.buffer = vzalloc(oat_data.buffer_len);
4923         if (!priv.buffer) {
4924                 rc = -ENOMEM;
4925                 goto out;
4926         }
4927
4928         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4929                                    SETADP_DATA_SIZEOF(query_oat));
4930         if (!iob) {
4931                 rc = -ENOMEM;
4932                 goto out_free;
4933         }
4934         cmd = __ipa_cmd(iob);
4935         oat_req = &cmd->data.setadapterparms.data.query_oat;
4936         oat_req->subcmd_code = oat_data.command;
4937
4938         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb,
4939                                &priv);
4940         if (!rc) {
4941                 if (is_compat_task())
4942                         tmp = compat_ptr(oat_data.ptr);
4943                 else
4944                         tmp = (void __user *)(unsigned long)oat_data.ptr;
4945
4946                 if (copy_to_user(tmp, priv.buffer,
4947                     priv.response_len)) {
4948                         rc = -EFAULT;
4949                         goto out_free;
4950                 }
4951
4952                 oat_data.response_len = priv.response_len;
4953
4954                 if (copy_to_user(udata, &oat_data,
4955                     sizeof(struct qeth_query_oat_data)))
4956                         rc = -EFAULT;
4957         }
4958
4959 out_free:
4960         vfree(priv.buffer);
4961 out:
4962         return rc;
4963 }
4964
4965 static int qeth_query_card_info_cb(struct qeth_card *card,
4966                                    struct qeth_reply *reply, unsigned long data)
4967 {
4968         struct carrier_info *carrier_info = (struct carrier_info *)reply->param;
4969         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4970         struct qeth_query_card_info *card_info;
4971
4972         QETH_CARD_TEXT(card, 2, "qcrdincb");
4973         if (qeth_setadpparms_inspect_rc(cmd))
4974                 return -EIO;
4975
4976         card_info = &cmd->data.setadapterparms.data.card_info;
4977         carrier_info->card_type = card_info->card_type;
4978         carrier_info->port_mode = card_info->port_mode;
4979         carrier_info->port_speed = card_info->port_speed;
4980         return 0;
4981 }
4982
4983 int qeth_query_card_info(struct qeth_card *card,
4984                          struct carrier_info *carrier_info)
4985 {
4986         struct qeth_cmd_buffer *iob;
4987
4988         QETH_CARD_TEXT(card, 2, "qcrdinfo");
4989         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_CARD_INFO))
4990                 return -EOPNOTSUPP;
4991         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_CARD_INFO, 0);
4992         if (!iob)
4993                 return -ENOMEM;
4994         return qeth_send_ipa_cmd(card, iob, qeth_query_card_info_cb,
4995                                         (void *)carrier_info);
4996 }
4997
4998 /**
4999  * qeth_vm_request_mac() - Request a hypervisor-managed MAC address
5000  * @card: pointer to a qeth_card
5001  *
5002  * Returns
5003  *      0, if a MAC address has been set for the card's netdevice
5004  *      a return code, for various error conditions
5005  */
5006 int qeth_vm_request_mac(struct qeth_card *card)
5007 {
5008         struct diag26c_mac_resp *response;
5009         struct diag26c_mac_req *request;
5010         struct ccw_dev_id id;
5011         int rc;
5012
5013         QETH_CARD_TEXT(card, 2, "vmreqmac");
5014
5015         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
5016         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
5017         if (!request || !response) {
5018                 rc = -ENOMEM;
5019                 goto out;
5020         }
5021
5022         ccw_device_get_id(CARD_DDEV(card), &id);
5023         request->resp_buf_len = sizeof(*response);
5024         request->resp_version = DIAG26C_VERSION2;
5025         request->op_code = DIAG26C_GET_MAC;
5026         request->devno = id.devno;
5027
5028         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
5029         rc = diag26c(request, response, DIAG26C_MAC_SERVICES);
5030         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
5031         if (rc)
5032                 goto out;
5033         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
5034
5035         if (request->resp_buf_len < sizeof(*response) ||
5036             response->version != request->resp_version) {
5037                 rc = -EIO;
5038                 QETH_CARD_TEXT(card, 2, "badresp");
5039                 QETH_CARD_HEX(card, 2, &request->resp_buf_len,
5040                               sizeof(request->resp_buf_len));
5041         } else if (!is_valid_ether_addr(response->mac)) {
5042                 rc = -EINVAL;
5043                 QETH_CARD_TEXT(card, 2, "badmac");
5044                 QETH_CARD_HEX(card, 2, response->mac, ETH_ALEN);
5045         } else {
5046                 ether_addr_copy(card->dev->dev_addr, response->mac);
5047         }
5048
5049 out:
5050         kfree(response);
5051         kfree(request);
5052         return rc;
5053 }
5054 EXPORT_SYMBOL_GPL(qeth_vm_request_mac);
5055
5056 static void qeth_determine_capabilities(struct qeth_card *card)
5057 {
5058         struct qeth_channel *channel = &card->data;
5059         struct ccw_device *ddev = channel->ccwdev;
5060         int rc;
5061         int ddev_offline = 0;
5062
5063         QETH_CARD_TEXT(card, 2, "detcapab");
5064         if (!ddev->online) {
5065                 ddev_offline = 1;
5066                 rc = qeth_start_channel(channel);
5067                 if (rc) {
5068                         QETH_CARD_TEXT_(card, 2, "3err%d", rc);
5069                         goto out;
5070                 }
5071         }
5072
5073         rc = qeth_read_conf_data(card);
5074         if (rc) {
5075                 QETH_DBF_MESSAGE(2, "qeth_read_conf_data on device %x returned %i\n",
5076                                  CARD_DEVID(card), rc);
5077                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
5078                 goto out_offline;
5079         }
5080
5081         rc = qdio_get_ssqd_desc(ddev, &card->ssqd);
5082         if (rc)
5083                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
5084
5085         QETH_CARD_TEXT_(card, 2, "qfmt%d", card->ssqd.qfmt);
5086         QETH_CARD_TEXT_(card, 2, "ac1:%02x", card->ssqd.qdioac1);
5087         QETH_CARD_TEXT_(card, 2, "ac2:%04x", card->ssqd.qdioac2);
5088         QETH_CARD_TEXT_(card, 2, "ac3:%04x", card->ssqd.qdioac3);
5089         QETH_CARD_TEXT_(card, 2, "icnt%d", card->ssqd.icnt);
5090         if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) ||
5091             ((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) ||
5092             ((card->ssqd.qdioac3 & CHSC_AC3_FORMAT2_CQ_AVAILABLE) == 0))) {
5093                 dev_info(&card->gdev->dev,
5094                         "Completion Queueing supported\n");
5095         } else {
5096                 card->options.cq = QETH_CQ_NOTAVAILABLE;
5097         }
5098
5099
5100 out_offline:
5101         if (ddev_offline == 1)
5102                 qeth_stop_channel(channel);
5103 out:
5104         return;
5105 }
5106
5107 static int qeth_qdio_establish(struct qeth_card *card)
5108 {
5109         struct qdio_buffer **out_sbal_ptrs[QETH_MAX_OUT_QUEUES];
5110         struct qdio_buffer **in_sbal_ptrs[QETH_MAX_IN_QUEUES];
5111         struct qdio_initialize init_data;
5112         char *qib_param_field;
5113         unsigned int i;
5114         int rc = 0;
5115
5116         QETH_CARD_TEXT(card, 2, "qdioest");
5117
5118         qib_param_field = kzalloc(sizeof_field(struct qib, parm), GFP_KERNEL);
5119         if (!qib_param_field) {
5120                 rc =  -ENOMEM;
5121                 goto out_free_nothing;
5122         }
5123
5124         qeth_create_qib_param_field(card, qib_param_field);
5125         qeth_create_qib_param_field_blkt(card, qib_param_field);
5126
5127         in_sbal_ptrs[0] = card->qdio.in_q->qdio_bufs;
5128         if (card->options.cq == QETH_CQ_ENABLED)
5129                 in_sbal_ptrs[1] = card->qdio.c_q->qdio_bufs;
5130
5131         for (i = 0; i < card->qdio.no_out_queues; i++)
5132                 out_sbal_ptrs[i] = card->qdio.out_qs[i]->qdio_bufs;
5133
5134         memset(&init_data, 0, sizeof(struct qdio_initialize));
5135         init_data.q_format               = IS_IQD(card) ? QDIO_IQDIO_QFMT :
5136                                                           QDIO_QETH_QFMT;
5137         init_data.qib_param_field_format = 0;
5138         init_data.qib_param_field        = qib_param_field;
5139         init_data.no_input_qs            = card->qdio.no_in_queues;
5140         init_data.no_output_qs           = card->qdio.no_out_queues;
5141         init_data.input_handler          = qeth_qdio_input_handler;
5142         init_data.output_handler         = qeth_qdio_output_handler;
5143         init_data.irq_poll               = qeth_qdio_poll;
5144         init_data.int_parm               = (unsigned long) card;
5145         init_data.input_sbal_addr_array  = in_sbal_ptrs;
5146         init_data.output_sbal_addr_array = out_sbal_ptrs;
5147         init_data.output_sbal_state_array = card->qdio.out_bufstates;
5148         init_data.scan_threshold         = IS_IQD(card) ? 0 : 32;
5149
5150         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED,
5151                 QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) {
5152                 rc = qdio_allocate(CARD_DDEV(card), init_data.no_input_qs,
5153                                    init_data.no_output_qs);
5154                 if (rc) {
5155                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5156                         goto out;
5157                 }
5158                 rc = qdio_establish(CARD_DDEV(card), &init_data);
5159                 if (rc) {
5160                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5161                         qdio_free(CARD_DDEV(card));
5162                 }
5163         }
5164
5165         switch (card->options.cq) {
5166         case QETH_CQ_ENABLED:
5167                 dev_info(&card->gdev->dev, "Completion Queue support enabled");
5168                 break;
5169         case QETH_CQ_DISABLED:
5170                 dev_info(&card->gdev->dev, "Completion Queue support disabled");
5171                 break;
5172         default:
5173                 break;
5174         }
5175 out:
5176         kfree(qib_param_field);
5177 out_free_nothing:
5178         return rc;
5179 }
5180
5181 static void qeth_core_free_card(struct qeth_card *card)
5182 {
5183         QETH_CARD_TEXT(card, 2, "freecrd");
5184
5185         unregister_service_level(&card->qeth_service_level);
5186         debugfs_remove_recursive(card->debugfs);
5187         qeth_put_cmd(card->read_cmd);
5188         destroy_workqueue(card->event_wq);
5189         dev_set_drvdata(&card->gdev->dev, NULL);
5190         kfree(card);
5191 }
5192
5193 void qeth_trace_features(struct qeth_card *card)
5194 {
5195         QETH_CARD_TEXT(card, 2, "features");
5196         QETH_CARD_HEX(card, 2, &card->options.ipa4, sizeof(card->options.ipa4));
5197         QETH_CARD_HEX(card, 2, &card->options.ipa6, sizeof(card->options.ipa6));
5198         QETH_CARD_HEX(card, 2, &card->options.adp, sizeof(card->options.adp));
5199         QETH_CARD_HEX(card, 2, &card->info.diagass_support,
5200                       sizeof(card->info.diagass_support));
5201 }
5202 EXPORT_SYMBOL_GPL(qeth_trace_features);
5203
5204 static struct ccw_device_id qeth_ids[] = {
5205         {CCW_DEVICE_DEVTYPE(0x1731, 0x01, 0x1732, 0x01),
5206                                         .driver_info = QETH_CARD_TYPE_OSD},
5207         {CCW_DEVICE_DEVTYPE(0x1731, 0x05, 0x1732, 0x05),
5208                                         .driver_info = QETH_CARD_TYPE_IQD},
5209 #ifdef CONFIG_QETH_OSN
5210         {CCW_DEVICE_DEVTYPE(0x1731, 0x06, 0x1732, 0x06),
5211                                         .driver_info = QETH_CARD_TYPE_OSN},
5212 #endif
5213         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x03),
5214                                         .driver_info = QETH_CARD_TYPE_OSM},
5215 #ifdef CONFIG_QETH_OSX
5216         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x02),
5217                                         .driver_info = QETH_CARD_TYPE_OSX},
5218 #endif
5219         {},
5220 };
5221 MODULE_DEVICE_TABLE(ccw, qeth_ids);
5222
5223 static struct ccw_driver qeth_ccw_driver = {
5224         .driver = {
5225                 .owner = THIS_MODULE,
5226                 .name = "qeth",
5227         },
5228         .ids = qeth_ids,
5229         .probe = ccwgroup_probe_ccwdev,
5230         .remove = ccwgroup_remove_ccwdev,
5231 };
5232
5233 int qeth_core_hardsetup_card(struct qeth_card *card, bool *carrier_ok)
5234 {
5235         int retries = 3;
5236         int rc;
5237
5238         QETH_CARD_TEXT(card, 2, "hrdsetup");
5239         atomic_set(&card->force_alloc_skb, 0);
5240         rc = qeth_update_from_chp_desc(card);
5241         if (rc)
5242                 return rc;
5243 retry:
5244         if (retries < 3)
5245                 QETH_DBF_MESSAGE(2, "Retrying to do IDX activates on device %x.\n",
5246                                  CARD_DEVID(card));
5247         rc = qeth_qdio_clear_card(card, !IS_IQD(card));
5248         qeth_stop_channel(&card->data);
5249         qeth_stop_channel(&card->write);
5250         qeth_stop_channel(&card->read);
5251         qdio_free(CARD_DDEV(card));
5252
5253         rc = qeth_start_channel(&card->read);
5254         if (rc)
5255                 goto retriable;
5256         rc = qeth_start_channel(&card->write);
5257         if (rc)
5258                 goto retriable;
5259         rc = qeth_start_channel(&card->data);
5260         if (rc)
5261                 goto retriable;
5262 retriable:
5263         if (rc == -ERESTARTSYS) {
5264                 QETH_CARD_TEXT(card, 2, "break1");
5265                 return rc;
5266         } else if (rc) {
5267                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
5268                 if (--retries < 0)
5269                         goto out;
5270                 else
5271                         goto retry;
5272         }
5273
5274         qeth_determine_capabilities(card);
5275         qeth_idx_init(card);
5276
5277         rc = qeth_idx_activate_read_channel(card);
5278         if (rc == -EINTR) {
5279                 QETH_CARD_TEXT(card, 2, "break2");
5280                 return rc;
5281         } else if (rc) {
5282                 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
5283                 if (--retries < 0)
5284                         goto out;
5285                 else
5286                         goto retry;
5287         }
5288
5289         rc = qeth_idx_activate_write_channel(card);
5290         if (rc == -EINTR) {
5291                 QETH_CARD_TEXT(card, 2, "break3");
5292                 return rc;
5293         } else if (rc) {
5294                 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
5295                 if (--retries < 0)
5296                         goto out;
5297                 else
5298                         goto retry;
5299         }
5300         card->read_or_write_problem = 0;
5301         rc = qeth_mpc_initialize(card);
5302         if (rc) {
5303                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
5304                 goto out;
5305         }
5306
5307         rc = qeth_send_startlan(card);
5308         if (rc) {
5309                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
5310                 if (rc == -ENETDOWN) {
5311                         dev_warn(&card->gdev->dev, "The LAN is offline\n");
5312                         *carrier_ok = false;
5313                 } else {
5314                         goto out;
5315                 }
5316         } else {
5317                 *carrier_ok = true;
5318         }
5319
5320         card->options.ipa4.supported = 0;
5321         card->options.ipa6.supported = 0;
5322         card->options.adp.supported = 0;
5323         card->options.sbp.supported_funcs = 0;
5324         card->info.diagass_support = 0;
5325         rc = qeth_query_ipassists(card, QETH_PROT_IPV4);
5326         if (rc == -ENOMEM)
5327                 goto out;
5328         if (qeth_is_supported(card, IPA_IPV6)) {
5329                 rc = qeth_query_ipassists(card, QETH_PROT_IPV6);
5330                 if (rc == -ENOMEM)
5331                         goto out;
5332         }
5333         if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
5334                 rc = qeth_query_setadapterparms(card);
5335                 if (rc < 0) {
5336                         QETH_CARD_TEXT_(card, 2, "7err%d", rc);
5337                         goto out;
5338                 }
5339         }
5340         if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
5341                 rc = qeth_query_setdiagass(card);
5342                 if (rc)
5343                         QETH_CARD_TEXT_(card, 2, "8err%d", rc);
5344         }
5345
5346         if (!qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP) ||
5347             (card->info.hwtrap && qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM)))
5348                 card->info.hwtrap = 0;
5349
5350         rc = qeth_set_access_ctrl_online(card, 0);
5351         if (rc)
5352                 goto out;
5353
5354         rc = qeth_init_qdio_queues(card);
5355         if (rc) {
5356                 QETH_CARD_TEXT_(card, 2, "9err%d", rc);
5357                 goto out;
5358         }
5359
5360         return 0;
5361 out:
5362         dev_warn(&card->gdev->dev, "The qeth device driver failed to recover "
5363                 "an error on the device\n");
5364         QETH_DBF_MESSAGE(2, "Initialization for device %x failed in hardsetup! rc=%d\n",
5365                          CARD_DEVID(card), rc);
5366         return rc;
5367 }
5368 EXPORT_SYMBOL_GPL(qeth_core_hardsetup_card);
5369
5370 static int qeth_set_online(struct qeth_card *card)
5371 {
5372         int rc;
5373
5374         mutex_lock(&card->discipline_mutex);
5375         mutex_lock(&card->conf_mutex);
5376         QETH_CARD_TEXT(card, 2, "setonlin");
5377
5378         rc = card->discipline->set_online(card);
5379
5380         mutex_unlock(&card->conf_mutex);
5381         mutex_unlock(&card->discipline_mutex);
5382
5383         return rc;
5384 }
5385
5386 int qeth_set_offline(struct qeth_card *card, bool resetting)
5387 {
5388         int rc, rc2, rc3;
5389
5390         mutex_lock(&card->discipline_mutex);
5391         mutex_lock(&card->conf_mutex);
5392         QETH_CARD_TEXT(card, 3, "setoffl");
5393
5394         if ((!resetting && card->info.hwtrap) || card->info.hwtrap == 2) {
5395                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
5396                 card->info.hwtrap = 1;
5397         }
5398
5399         rtnl_lock();
5400         card->info.open_when_online = card->dev->flags & IFF_UP;
5401         dev_close(card->dev);
5402         netif_device_detach(card->dev);
5403         netif_carrier_off(card->dev);
5404         rtnl_unlock();
5405
5406         card->discipline->set_offline(card);
5407
5408         rc  = qeth_stop_channel(&card->data);
5409         rc2 = qeth_stop_channel(&card->write);
5410         rc3 = qeth_stop_channel(&card->read);
5411         if (!rc)
5412                 rc = (rc2) ? rc2 : rc3;
5413         if (rc)
5414                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
5415         qdio_free(CARD_DDEV(card));
5416
5417         /* let user_space know that device is offline */
5418         kobject_uevent(&card->gdev->dev.kobj, KOBJ_CHANGE);
5419
5420         mutex_unlock(&card->conf_mutex);
5421         mutex_unlock(&card->discipline_mutex);
5422         return 0;
5423 }
5424 EXPORT_SYMBOL_GPL(qeth_set_offline);
5425
5426 static int qeth_do_reset(void *data)
5427 {
5428         struct qeth_card *card = data;
5429         int rc;
5430
5431         QETH_CARD_TEXT(card, 2, "recover1");
5432         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
5433                 return 0;
5434         QETH_CARD_TEXT(card, 2, "recover2");
5435         dev_warn(&card->gdev->dev,
5436                  "A recovery process has been started for the device\n");
5437
5438         qeth_set_offline(card, true);
5439         rc = qeth_set_online(card);
5440         if (!rc) {
5441                 dev_info(&card->gdev->dev,
5442                          "Device successfully recovered!\n");
5443         } else {
5444                 ccwgroup_set_offline(card->gdev);
5445                 dev_warn(&card->gdev->dev,
5446                          "The qeth device driver failed to recover an error on the device\n");
5447         }
5448         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
5449         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
5450         return 0;
5451 }
5452
5453 #if IS_ENABLED(CONFIG_QETH_L3)
5454 static void qeth_l3_rebuild_skb(struct qeth_card *card, struct sk_buff *skb,
5455                                 struct qeth_hdr *hdr)
5456 {
5457         struct af_iucv_trans_hdr *iucv = (struct af_iucv_trans_hdr *) skb->data;
5458         struct qeth_hdr_layer3 *l3_hdr = &hdr->hdr.l3;
5459         struct net_device *dev = skb->dev;
5460
5461         if (IS_IQD(card) && iucv->magic == ETH_P_AF_IUCV) {
5462                 dev_hard_header(skb, dev, ETH_P_AF_IUCV, dev->dev_addr,
5463                                 "FAKELL", skb->len);
5464                 return;
5465         }
5466
5467         if (!(l3_hdr->flags & QETH_HDR_PASSTHRU)) {
5468                 u16 prot = (l3_hdr->flags & QETH_HDR_IPV6) ? ETH_P_IPV6 :
5469                                                              ETH_P_IP;
5470                 unsigned char tg_addr[ETH_ALEN];
5471
5472                 skb_reset_network_header(skb);
5473                 switch (l3_hdr->flags & QETH_HDR_CAST_MASK) {
5474                 case QETH_CAST_MULTICAST:
5475                         if (prot == ETH_P_IP)
5476                                 ip_eth_mc_map(ip_hdr(skb)->daddr, tg_addr);
5477                         else
5478                                 ipv6_eth_mc_map(&ipv6_hdr(skb)->daddr, tg_addr);
5479                         QETH_CARD_STAT_INC(card, rx_multicast);
5480                         break;
5481                 case QETH_CAST_BROADCAST:
5482                         ether_addr_copy(tg_addr, dev->broadcast);
5483                         QETH_CARD_STAT_INC(card, rx_multicast);
5484                         break;
5485                 default:
5486                         if (card->options.sniffer)
5487                                 skb->pkt_type = PACKET_OTHERHOST;
5488                         ether_addr_copy(tg_addr, dev->dev_addr);
5489                 }
5490
5491                 if (l3_hdr->ext_flags & QETH_HDR_EXT_SRC_MAC_ADDR)
5492                         dev_hard_header(skb, dev, prot, tg_addr,
5493                                         &l3_hdr->next_hop.rx.src_mac, skb->len);
5494                 else
5495                         dev_hard_header(skb, dev, prot, tg_addr, "FAKELL",
5496                                         skb->len);
5497         }
5498
5499         /* copy VLAN tag from hdr into skb */
5500         if (!card->options.sniffer &&
5501             (l3_hdr->ext_flags & (QETH_HDR_EXT_VLAN_FRAME |
5502                                   QETH_HDR_EXT_INCLUDE_VLAN_TAG))) {
5503                 u16 tag = (l3_hdr->ext_flags & QETH_HDR_EXT_VLAN_FRAME) ?
5504                                 l3_hdr->vlan_id :
5505                                 l3_hdr->next_hop.rx.vlan_id;
5506
5507                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag);
5508         }
5509 }
5510 #endif
5511
5512 static void qeth_receive_skb(struct qeth_card *card, struct sk_buff *skb,
5513                              struct qeth_hdr *hdr, bool uses_frags)
5514 {
5515         struct napi_struct *napi = &card->napi;
5516         bool is_cso;
5517
5518         switch (hdr->hdr.l2.id) {
5519         case QETH_HEADER_TYPE_OSN:
5520                 skb_push(skb, sizeof(*hdr));
5521                 skb_copy_to_linear_data(skb, hdr, sizeof(*hdr));
5522                 QETH_CARD_STAT_ADD(card, rx_bytes, skb->len);
5523                 QETH_CARD_STAT_INC(card, rx_packets);
5524
5525                 card->osn_info.data_cb(skb);
5526                 return;
5527 #if IS_ENABLED(CONFIG_QETH_L3)
5528         case QETH_HEADER_TYPE_LAYER3:
5529                 qeth_l3_rebuild_skb(card, skb, hdr);
5530                 is_cso = hdr->hdr.l3.ext_flags & QETH_HDR_EXT_CSUM_TRANSP_REQ;
5531                 break;
5532 #endif
5533         case QETH_HEADER_TYPE_LAYER2:
5534                 is_cso = hdr->hdr.l2.flags[1] & QETH_HDR_EXT_CSUM_TRANSP_REQ;
5535                 break;
5536         default:
5537                 /* never happens */
5538                 if (uses_frags)
5539                         napi_free_frags(napi);
5540                 else
5541                         dev_kfree_skb_any(skb);
5542                 return;
5543         }
5544
5545         if (is_cso && (card->dev->features & NETIF_F_RXCSUM)) {
5546                 skb->ip_summed = CHECKSUM_UNNECESSARY;
5547                 QETH_CARD_STAT_INC(card, rx_skb_csum);
5548         } else {
5549                 skb->ip_summed = CHECKSUM_NONE;
5550         }
5551
5552         QETH_CARD_STAT_ADD(card, rx_bytes, skb->len);
5553         QETH_CARD_STAT_INC(card, rx_packets);
5554         if (skb_is_nonlinear(skb)) {
5555                 QETH_CARD_STAT_INC(card, rx_sg_skbs);
5556                 QETH_CARD_STAT_ADD(card, rx_sg_frags,
5557                                    skb_shinfo(skb)->nr_frags);
5558         }
5559
5560         if (uses_frags) {
5561                 napi_gro_frags(napi);
5562         } else {
5563                 skb->protocol = eth_type_trans(skb, skb->dev);
5564                 napi_gro_receive(napi, skb);
5565         }
5566 }
5567
5568 static void qeth_create_skb_frag(struct sk_buff *skb, char *data, int data_len)
5569 {
5570         struct page *page = virt_to_page(data);
5571         unsigned int next_frag;
5572
5573         next_frag = skb_shinfo(skb)->nr_frags;
5574         get_page(page);
5575         skb_add_rx_frag(skb, next_frag, page, offset_in_page(data), data_len,
5576                         data_len);
5577 }
5578
5579 static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale)
5580 {
5581         return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY);
5582 }
5583
5584 static int qeth_extract_skb(struct qeth_card *card,
5585                             struct qeth_qdio_buffer *qethbuffer, u8 *element_no,
5586                             int *__offset)
5587 {
5588         struct qeth_priv *priv = netdev_priv(card->dev);
5589         struct qdio_buffer *buffer = qethbuffer->buffer;
5590         struct napi_struct *napi = &card->napi;
5591         struct qdio_buffer_element *element;
5592         unsigned int linear_len = 0;
5593         bool uses_frags = false;
5594         int offset = *__offset;
5595         bool use_rx_sg = false;
5596         unsigned int headroom;
5597         struct qeth_hdr *hdr;
5598         struct sk_buff *skb;
5599         int skb_len = 0;
5600
5601         element = &buffer->element[*element_no];
5602
5603 next_packet:
5604         /* qeth_hdr must not cross element boundaries */
5605         while (element->length < offset + sizeof(struct qeth_hdr)) {
5606                 if (qeth_is_last_sbale(element))
5607                         return -ENODATA;
5608                 element++;
5609                 offset = 0;
5610         }
5611
5612         hdr = phys_to_virt(element->addr) + offset;
5613         offset += sizeof(*hdr);
5614         skb = NULL;
5615
5616         switch (hdr->hdr.l2.id) {
5617         case QETH_HEADER_TYPE_LAYER2:
5618                 skb_len = hdr->hdr.l2.pkt_length;
5619                 linear_len = ETH_HLEN;
5620                 headroom = 0;
5621                 break;
5622         case QETH_HEADER_TYPE_LAYER3:
5623                 skb_len = hdr->hdr.l3.length;
5624                 if (!IS_LAYER3(card)) {
5625                         QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5626                         goto walk_packet;
5627                 }
5628
5629                 if (hdr->hdr.l3.flags & QETH_HDR_PASSTHRU) {
5630                         linear_len = ETH_HLEN;
5631                         headroom = 0;
5632                         break;
5633                 }
5634
5635                 if (hdr->hdr.l3.flags & QETH_HDR_IPV6)
5636                         linear_len = sizeof(struct ipv6hdr);
5637                 else
5638                         linear_len = sizeof(struct iphdr);
5639                 headroom = ETH_HLEN;
5640                 break;
5641         case QETH_HEADER_TYPE_OSN:
5642                 skb_len = hdr->hdr.osn.pdu_length;
5643                 if (!IS_OSN(card)) {
5644                         QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5645                         goto walk_packet;
5646                 }
5647
5648                 linear_len = skb_len;
5649                 headroom = sizeof(struct qeth_hdr);
5650                 break;
5651         default:
5652                 if (hdr->hdr.l2.id & QETH_HEADER_MASK_INVAL)
5653                         QETH_CARD_STAT_INC(card, rx_frame_errors);
5654                 else
5655                         QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5656
5657                 /* Can't determine packet length, drop the whole buffer. */
5658                 return -EPROTONOSUPPORT;
5659         }
5660
5661         if (skb_len < linear_len) {
5662                 QETH_CARD_STAT_INC(card, rx_dropped_runt);
5663                 goto walk_packet;
5664         }
5665
5666         use_rx_sg = (card->options.cq == QETH_CQ_ENABLED) ||
5667                     (skb_len > READ_ONCE(priv->rx_copybreak) &&
5668                      !atomic_read(&card->force_alloc_skb) &&
5669                      !IS_OSN(card));
5670
5671         if (use_rx_sg) {
5672                 /* QETH_CQ_ENABLED only: */
5673                 if (qethbuffer->rx_skb &&
5674                     skb_tailroom(qethbuffer->rx_skb) >= linear_len + headroom) {
5675                         skb = qethbuffer->rx_skb;
5676                         qethbuffer->rx_skb = NULL;
5677                         goto use_skb;
5678                 }
5679
5680                 skb = napi_get_frags(napi);
5681                 if (!skb) {
5682                         /* -ENOMEM, no point in falling back further. */
5683                         QETH_CARD_STAT_INC(card, rx_dropped_nomem);
5684                         goto walk_packet;
5685                 }
5686
5687                 if (skb_tailroom(skb) >= linear_len + headroom) {
5688                         uses_frags = true;
5689                         goto use_skb;
5690                 }
5691
5692                 netdev_info_once(card->dev,
5693                                  "Insufficient linear space in NAPI frags skb, need %u but have %u\n",
5694                                  linear_len + headroom, skb_tailroom(skb));
5695                 /* Shouldn't happen. Don't optimize, fall back to linear skb. */
5696         }
5697
5698         linear_len = skb_len;
5699         skb = napi_alloc_skb(napi, linear_len + headroom);
5700         if (!skb) {
5701                 QETH_CARD_STAT_INC(card, rx_dropped_nomem);
5702                 goto walk_packet;
5703         }
5704
5705 use_skb:
5706         if (headroom)
5707                 skb_reserve(skb, headroom);
5708 walk_packet:
5709         while (skb_len) {
5710                 int data_len = min(skb_len, (int)(element->length - offset));
5711                 char *data = phys_to_virt(element->addr) + offset;
5712
5713                 skb_len -= data_len;
5714                 offset += data_len;
5715
5716                 /* Extract data from current element: */
5717                 if (skb && data_len) {
5718                         if (linear_len) {
5719                                 unsigned int copy_len;
5720
5721                                 copy_len = min_t(unsigned int, linear_len,
5722                                                  data_len);
5723
5724                                 skb_put_data(skb, data, copy_len);
5725                                 linear_len -= copy_len;
5726                                 data_len -= copy_len;
5727                                 data += copy_len;
5728                         }
5729
5730                         if (data_len)
5731                                 qeth_create_skb_frag(skb, data, data_len);
5732                 }
5733
5734                 /* Step forward to next element: */
5735                 if (skb_len) {
5736                         if (qeth_is_last_sbale(element)) {
5737                                 QETH_CARD_TEXT(card, 4, "unexeob");
5738                                 QETH_CARD_HEX(card, 2, buffer, sizeof(void *));
5739                                 if (skb) {
5740                                         if (uses_frags)
5741                                                 napi_free_frags(napi);
5742                                         else
5743                                                 dev_kfree_skb_any(skb);
5744                                         QETH_CARD_STAT_INC(card,
5745                                                            rx_length_errors);
5746                                 }
5747                                 return -EMSGSIZE;
5748                         }
5749                         element++;
5750                         offset = 0;
5751                 }
5752         }
5753
5754         /* This packet was skipped, go get another one: */
5755         if (!skb)
5756                 goto next_packet;
5757
5758         *element_no = element - &buffer->element[0];
5759         *__offset = offset;
5760
5761         qeth_receive_skb(card, skb, hdr, uses_frags);
5762         return 0;
5763 }
5764
5765 static unsigned int qeth_extract_skbs(struct qeth_card *card, int budget,
5766                                       struct qeth_qdio_buffer *buf, bool *done)
5767 {
5768         unsigned int work_done = 0;
5769
5770         while (budget) {
5771                 if (qeth_extract_skb(card, buf, &card->rx.buf_element,
5772                                      &card->rx.e_offset)) {
5773                         *done = true;
5774                         break;
5775                 }
5776
5777                 work_done++;
5778                 budget--;
5779         }
5780
5781         return work_done;
5782 }
5783
5784 static unsigned int qeth_rx_poll(struct qeth_card *card, int budget)
5785 {
5786         unsigned int work_done = 0;
5787
5788         while (budget > 0) {
5789                 struct qeth_qdio_buffer *buffer;
5790                 unsigned int skbs_done = 0;
5791                 bool done = false;
5792
5793                 /* Fetch completed RX buffers: */
5794                 if (!card->rx.b_count) {
5795                         card->rx.qdio_err = 0;
5796                         card->rx.b_count = qdio_get_next_buffers(
5797                                 card->data.ccwdev, 0, &card->rx.b_index,
5798                                 &card->rx.qdio_err);
5799                         if (card->rx.b_count <= 0) {
5800                                 card->rx.b_count = 0;
5801                                 break;
5802                         }
5803                 }
5804
5805                 /* Process one completed RX buffer: */
5806                 buffer = &card->qdio.in_q->bufs[card->rx.b_index];
5807                 if (!(card->rx.qdio_err &&
5808                       qeth_check_qdio_errors(card, buffer->buffer,
5809                                              card->rx.qdio_err, "qinerr")))
5810                         skbs_done = qeth_extract_skbs(card, budget, buffer,
5811                                                       &done);
5812                 else
5813                         done = true;
5814
5815                 work_done += skbs_done;
5816                 budget -= skbs_done;
5817
5818                 if (done) {
5819                         QETH_CARD_STAT_INC(card, rx_bufs);
5820                         qeth_put_buffer_pool_entry(card, buffer->pool_entry);
5821                         qeth_queue_input_buffer(card, card->rx.b_index);
5822                         card->rx.b_count--;
5823
5824                         /* Step forward to next buffer: */
5825                         card->rx.b_index = QDIO_BUFNR(card->rx.b_index + 1);
5826                         card->rx.buf_element = 0;
5827                         card->rx.e_offset = 0;
5828                 }
5829         }
5830
5831         return work_done;
5832 }
5833
5834 static void qeth_cq_poll(struct qeth_card *card)
5835 {
5836         unsigned int work_done = 0;
5837
5838         while (work_done < QDIO_MAX_BUFFERS_PER_Q) {
5839                 unsigned int start, error;
5840                 int completed;
5841
5842                 completed = qdio_inspect_queue(CARD_DDEV(card), 1, true, &start,
5843                                                &error);
5844                 if (completed <= 0)
5845                         return;
5846
5847                 qeth_qdio_cq_handler(card, error, 1, start, completed);
5848                 work_done += completed;
5849         }
5850 }
5851
5852 int qeth_poll(struct napi_struct *napi, int budget)
5853 {
5854         struct qeth_card *card = container_of(napi, struct qeth_card, napi);
5855         unsigned int work_done;
5856
5857         work_done = qeth_rx_poll(card, budget);
5858
5859         if (card->options.cq == QETH_CQ_ENABLED)
5860                 qeth_cq_poll(card);
5861
5862         /* Exhausted the RX budget. Keep IRQ disabled, we get called again. */
5863         if (budget && work_done >= budget)
5864                 return work_done;
5865
5866         if (napi_complete_done(napi, work_done) &&
5867             qdio_start_irq(CARD_DDEV(card)))
5868                 napi_schedule(napi);
5869
5870         return work_done;
5871 }
5872 EXPORT_SYMBOL_GPL(qeth_poll);
5873
5874 static void qeth_iqd_tx_complete(struct qeth_qdio_out_q *queue,
5875                                  unsigned int bidx, bool error, int budget)
5876 {
5877         struct qeth_qdio_out_buffer *buffer = queue->bufs[bidx];
5878         u8 sflags = buffer->buffer->element[15].sflags;
5879         struct qeth_card *card = queue->card;
5880
5881         if (queue->bufstates && (queue->bufstates[bidx].flags &
5882                                  QDIO_OUTBUF_STATE_FLAG_PENDING)) {
5883                 WARN_ON_ONCE(card->options.cq != QETH_CQ_ENABLED);
5884
5885                 if (atomic_cmpxchg(&buffer->state, QETH_QDIO_BUF_PRIMED,
5886                                                    QETH_QDIO_BUF_PENDING) ==
5887                     QETH_QDIO_BUF_PRIMED)
5888                         qeth_notify_skbs(queue, buffer, TX_NOTIFY_PENDING);
5889
5890                 QETH_CARD_TEXT_(card, 5, "pel%u", bidx);
5891
5892                 /* prepare the queue slot for re-use: */
5893                 qeth_scrub_qdio_buffer(buffer->buffer, queue->max_elements);
5894                 if (qeth_init_qdio_out_buf(queue, bidx)) {
5895                         QETH_CARD_TEXT(card, 2, "outofbuf");
5896                         qeth_schedule_recovery(card);
5897                 }
5898
5899                 return;
5900         }
5901
5902         if (card->options.cq == QETH_CQ_ENABLED)
5903                 qeth_notify_skbs(queue, buffer,
5904                                  qeth_compute_cq_notification(sflags, 0));
5905         qeth_clear_output_buffer(queue, buffer, error, budget);
5906 }
5907
5908 static int qeth_tx_poll(struct napi_struct *napi, int budget)
5909 {
5910         struct qeth_qdio_out_q *queue = qeth_napi_to_out_queue(napi);
5911         unsigned int queue_no = queue->queue_no;
5912         struct qeth_card *card = queue->card;
5913         struct net_device *dev = card->dev;
5914         unsigned int work_done = 0;
5915         struct netdev_queue *txq;
5916
5917         txq = netdev_get_tx_queue(dev, qeth_iqd_translate_txq(dev, queue_no));
5918
5919         while (1) {
5920                 unsigned int start, error, i;
5921                 unsigned int packets = 0;
5922                 unsigned int bytes = 0;
5923                 int completed;
5924
5925                 if (qeth_out_queue_is_empty(queue)) {
5926                         napi_complete(napi);
5927                         return 0;
5928                 }
5929
5930                 /* Give the CPU a breather: */
5931                 if (work_done >= QDIO_MAX_BUFFERS_PER_Q) {
5932                         QETH_TXQ_STAT_INC(queue, completion_yield);
5933                         if (napi_complete_done(napi, 0))
5934                                 napi_schedule(napi);
5935                         return 0;
5936                 }
5937
5938                 completed = qdio_inspect_queue(CARD_DDEV(card), queue_no, false,
5939                                                &start, &error);
5940                 if (completed <= 0) {
5941                         /* Ensure we see TX completion for pending work: */
5942                         if (napi_complete_done(napi, 0))
5943                                 qeth_tx_arm_timer(queue, QETH_TX_TIMER_USECS);
5944                         return 0;
5945                 }
5946
5947                 for (i = start; i < start + completed; i++) {
5948                         struct qeth_qdio_out_buffer *buffer;
5949                         unsigned int bidx = QDIO_BUFNR(i);
5950
5951                         buffer = queue->bufs[bidx];
5952                         packets += buffer->frames;
5953                         bytes += buffer->bytes;
5954
5955                         qeth_handle_send_error(card, buffer, error);
5956                         qeth_iqd_tx_complete(queue, bidx, error, budget);
5957                         qeth_cleanup_handled_pending(queue, bidx, false);
5958                 }
5959
5960                 netdev_tx_completed_queue(txq, packets, bytes);
5961                 atomic_sub(completed, &queue->used_buffers);
5962                 work_done += completed;
5963
5964                 /* xmit may have observed the full-condition, but not yet
5965                  * stopped the txq. In which case the code below won't trigger.
5966                  * So before returning, xmit will re-check the txq's fill level
5967                  * and wake it up if needed.
5968                  */
5969                 if (netif_tx_queue_stopped(txq) &&
5970                     !qeth_out_queue_is_full(queue))
5971                         netif_tx_wake_queue(txq);
5972         }
5973 }
5974
5975 static int qeth_setassparms_inspect_rc(struct qeth_ipa_cmd *cmd)
5976 {
5977         if (!cmd->hdr.return_code)
5978                 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
5979         return cmd->hdr.return_code;
5980 }
5981
5982 static int qeth_setassparms_get_caps_cb(struct qeth_card *card,
5983                                         struct qeth_reply *reply,
5984                                         unsigned long data)
5985 {
5986         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5987         struct qeth_ipa_caps *caps = reply->param;
5988
5989         if (qeth_setassparms_inspect_rc(cmd))
5990                 return -EIO;
5991
5992         caps->supported = cmd->data.setassparms.data.caps.supported;
5993         caps->enabled = cmd->data.setassparms.data.caps.enabled;
5994         return 0;
5995 }
5996
5997 int qeth_setassparms_cb(struct qeth_card *card,
5998                         struct qeth_reply *reply, unsigned long data)
5999 {
6000         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6001
6002         QETH_CARD_TEXT(card, 4, "defadpcb");
6003
6004         if (cmd->hdr.return_code)
6005                 return -EIO;
6006
6007         cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
6008         if (cmd->hdr.prot_version == QETH_PROT_IPV4)
6009                 card->options.ipa4.enabled = cmd->hdr.assists.enabled;
6010         if (cmd->hdr.prot_version == QETH_PROT_IPV6)
6011                 card->options.ipa6.enabled = cmd->hdr.assists.enabled;
6012         return 0;
6013 }
6014 EXPORT_SYMBOL_GPL(qeth_setassparms_cb);
6015
6016 struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card,
6017                                                  enum qeth_ipa_funcs ipa_func,
6018                                                  u16 cmd_code,
6019                                                  unsigned int data_length,
6020                                                  enum qeth_prot_versions prot)
6021 {
6022         struct qeth_ipacmd_setassparms *setassparms;
6023         struct qeth_ipacmd_setassparms_hdr *hdr;
6024         struct qeth_cmd_buffer *iob;
6025
6026         QETH_CARD_TEXT(card, 4, "getasscm");
6027         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETASSPARMS, prot,
6028                                  data_length +
6029                                  offsetof(struct qeth_ipacmd_setassparms,
6030                                           data));
6031         if (!iob)
6032                 return NULL;
6033
6034         setassparms = &__ipa_cmd(iob)->data.setassparms;
6035         setassparms->assist_no = ipa_func;
6036
6037         hdr = &setassparms->hdr;
6038         hdr->length = sizeof(*hdr) + data_length;
6039         hdr->command_code = cmd_code;
6040         return iob;
6041 }
6042 EXPORT_SYMBOL_GPL(qeth_get_setassparms_cmd);
6043
6044 int qeth_send_simple_setassparms_prot(struct qeth_card *card,
6045                                       enum qeth_ipa_funcs ipa_func,
6046                                       u16 cmd_code, u32 *data,
6047                                       enum qeth_prot_versions prot)
6048 {
6049         unsigned int length = data ? SETASS_DATA_SIZEOF(flags_32bit) : 0;
6050         struct qeth_cmd_buffer *iob;
6051
6052         QETH_CARD_TEXT_(card, 4, "simassp%i", prot);
6053         iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code, length, prot);
6054         if (!iob)
6055                 return -ENOMEM;
6056
6057         if (data)
6058                 __ipa_cmd(iob)->data.setassparms.data.flags_32bit = *data;
6059         return qeth_send_ipa_cmd(card, iob, qeth_setassparms_cb, NULL);
6060 }
6061 EXPORT_SYMBOL_GPL(qeth_send_simple_setassparms_prot);
6062
6063 static void qeth_unregister_dbf_views(void)
6064 {
6065         int x;
6066         for (x = 0; x < QETH_DBF_INFOS; x++) {
6067                 debug_unregister(qeth_dbf[x].id);
6068                 qeth_dbf[x].id = NULL;
6069         }
6070 }
6071
6072 void qeth_dbf_longtext(debug_info_t *id, int level, char *fmt, ...)
6073 {
6074         char dbf_txt_buf[32];
6075         va_list args;
6076
6077         if (!debug_level_enabled(id, level))
6078                 return;
6079         va_start(args, fmt);
6080         vsnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
6081         va_end(args);
6082         debug_text_event(id, level, dbf_txt_buf);
6083 }
6084 EXPORT_SYMBOL_GPL(qeth_dbf_longtext);
6085
6086 static int qeth_register_dbf_views(void)
6087 {
6088         int ret;
6089         int x;
6090
6091         for (x = 0; x < QETH_DBF_INFOS; x++) {
6092                 /* register the areas */
6093                 qeth_dbf[x].id = debug_register(qeth_dbf[x].name,
6094                                                 qeth_dbf[x].pages,
6095                                                 qeth_dbf[x].areas,
6096                                                 qeth_dbf[x].len);
6097                 if (qeth_dbf[x].id == NULL) {
6098                         qeth_unregister_dbf_views();
6099                         return -ENOMEM;
6100                 }
6101
6102                 /* register a view */
6103                 ret = debug_register_view(qeth_dbf[x].id, qeth_dbf[x].view);
6104                 if (ret) {
6105                         qeth_unregister_dbf_views();
6106                         return ret;
6107                 }
6108
6109                 /* set a passing level */
6110                 debug_set_level(qeth_dbf[x].id, qeth_dbf[x].level);
6111         }
6112
6113         return 0;
6114 }
6115
6116 static DEFINE_MUTEX(qeth_mod_mutex);    /* for synchronized module loading */
6117
6118 int qeth_core_load_discipline(struct qeth_card *card,
6119                 enum qeth_discipline_id discipline)
6120 {
6121         mutex_lock(&qeth_mod_mutex);
6122         switch (discipline) {
6123         case QETH_DISCIPLINE_LAYER3:
6124                 card->discipline = try_then_request_module(
6125                         symbol_get(qeth_l3_discipline), "qeth_l3");
6126                 break;
6127         case QETH_DISCIPLINE_LAYER2:
6128                 card->discipline = try_then_request_module(
6129                         symbol_get(qeth_l2_discipline), "qeth_l2");
6130                 break;
6131         default:
6132                 break;
6133         }
6134         mutex_unlock(&qeth_mod_mutex);
6135
6136         if (!card->discipline) {
6137                 dev_err(&card->gdev->dev, "There is no kernel module to "
6138                         "support discipline %d\n", discipline);
6139                 return -EINVAL;
6140         }
6141
6142         card->options.layer = discipline;
6143         return 0;
6144 }
6145
6146 void qeth_core_free_discipline(struct qeth_card *card)
6147 {
6148         if (IS_LAYER2(card))
6149                 symbol_put(qeth_l2_discipline);
6150         else
6151                 symbol_put(qeth_l3_discipline);
6152         card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
6153         card->discipline = NULL;
6154 }
6155
6156 const struct device_type qeth_generic_devtype = {
6157         .name = "qeth_generic",
6158         .groups = qeth_generic_attr_groups,
6159 };
6160 EXPORT_SYMBOL_GPL(qeth_generic_devtype);
6161
6162 static const struct device_type qeth_osn_devtype = {
6163         .name = "qeth_osn",
6164         .groups = qeth_osn_attr_groups,
6165 };
6166
6167 #define DBF_NAME_LEN    20
6168
6169 struct qeth_dbf_entry {
6170         char dbf_name[DBF_NAME_LEN];
6171         debug_info_t *dbf_info;
6172         struct list_head dbf_list;
6173 };
6174
6175 static LIST_HEAD(qeth_dbf_list);
6176 static DEFINE_MUTEX(qeth_dbf_list_mutex);
6177
6178 static debug_info_t *qeth_get_dbf_entry(char *name)
6179 {
6180         struct qeth_dbf_entry *entry;
6181         debug_info_t *rc = NULL;
6182
6183         mutex_lock(&qeth_dbf_list_mutex);
6184         list_for_each_entry(entry, &qeth_dbf_list, dbf_list) {
6185                 if (strcmp(entry->dbf_name, name) == 0) {
6186                         rc = entry->dbf_info;
6187                         break;
6188                 }
6189         }
6190         mutex_unlock(&qeth_dbf_list_mutex);
6191         return rc;
6192 }
6193
6194 static int qeth_add_dbf_entry(struct qeth_card *card, char *name)
6195 {
6196         struct qeth_dbf_entry *new_entry;
6197
6198         card->debug = debug_register(name, 2, 1, 8);
6199         if (!card->debug) {
6200                 QETH_DBF_TEXT_(SETUP, 2, "%s", "qcdbf");
6201                 goto err;
6202         }
6203         if (debug_register_view(card->debug, &debug_hex_ascii_view))
6204                 goto err_dbg;
6205         new_entry = kzalloc(sizeof(struct qeth_dbf_entry), GFP_KERNEL);
6206         if (!new_entry)
6207                 goto err_dbg;
6208         strncpy(new_entry->dbf_name, name, DBF_NAME_LEN);
6209         new_entry->dbf_info = card->debug;
6210         mutex_lock(&qeth_dbf_list_mutex);
6211         list_add(&new_entry->dbf_list, &qeth_dbf_list);
6212         mutex_unlock(&qeth_dbf_list_mutex);
6213
6214         return 0;
6215
6216 err_dbg:
6217         debug_unregister(card->debug);
6218 err:
6219         return -ENOMEM;
6220 }
6221
6222 static void qeth_clear_dbf_list(void)
6223 {
6224         struct qeth_dbf_entry *entry, *tmp;
6225
6226         mutex_lock(&qeth_dbf_list_mutex);
6227         list_for_each_entry_safe(entry, tmp, &qeth_dbf_list, dbf_list) {
6228                 list_del(&entry->dbf_list);
6229                 debug_unregister(entry->dbf_info);
6230                 kfree(entry);
6231         }
6232         mutex_unlock(&qeth_dbf_list_mutex);
6233 }
6234
6235 static struct net_device *qeth_alloc_netdev(struct qeth_card *card)
6236 {
6237         struct net_device *dev;
6238         struct qeth_priv *priv;
6239
6240         switch (card->info.type) {
6241         case QETH_CARD_TYPE_IQD:
6242                 dev = alloc_netdev_mqs(sizeof(*priv), "hsi%d", NET_NAME_UNKNOWN,
6243                                        ether_setup, QETH_MAX_OUT_QUEUES, 1);
6244                 break;
6245         case QETH_CARD_TYPE_OSM:
6246                 dev = alloc_etherdev(sizeof(*priv));
6247                 break;
6248         case QETH_CARD_TYPE_OSN:
6249                 dev = alloc_netdev(sizeof(*priv), "osn%d", NET_NAME_UNKNOWN,
6250                                    ether_setup);
6251                 break;
6252         default:
6253                 dev = alloc_etherdev_mqs(sizeof(*priv), QETH_MAX_OUT_QUEUES, 1);
6254         }
6255
6256         if (!dev)
6257                 return NULL;
6258
6259         priv = netdev_priv(dev);
6260         priv->rx_copybreak = QETH_RX_COPYBREAK;
6261
6262         dev->ml_priv = card;
6263         dev->watchdog_timeo = QETH_TX_TIMEOUT;
6264         dev->min_mtu = IS_OSN(card) ? 64 : 576;
6265          /* initialized when device first goes online: */
6266         dev->max_mtu = 0;
6267         dev->mtu = 0;
6268         SET_NETDEV_DEV(dev, &card->gdev->dev);
6269         netif_carrier_off(dev);
6270
6271         dev->ethtool_ops = IS_OSN(card) ? &qeth_osn_ethtool_ops :
6272                                           &qeth_ethtool_ops;
6273
6274         return dev;
6275 }
6276
6277 struct net_device *qeth_clone_netdev(struct net_device *orig)
6278 {
6279         struct net_device *clone = qeth_alloc_netdev(orig->ml_priv);
6280
6281         if (!clone)
6282                 return NULL;
6283
6284         clone->dev_port = orig->dev_port;
6285         return clone;
6286 }
6287
6288 int qeth_setup_netdev(struct qeth_card *card)
6289 {
6290         struct net_device *dev = card->dev;
6291         unsigned int num_tx_queues;
6292
6293         dev->priv_flags &= ~IFF_TX_SKB_SHARING;
6294         dev->hw_features |= NETIF_F_SG;
6295         dev->vlan_features |= NETIF_F_SG;
6296
6297         if (IS_IQD(card)) {
6298                 dev->features |= NETIF_F_SG;
6299                 num_tx_queues = QETH_IQD_MIN_TXQ;
6300         } else if (IS_VM_NIC(card)) {
6301                 num_tx_queues = 1;
6302         } else {
6303                 num_tx_queues = dev->real_num_tx_queues;
6304         }
6305
6306         return qeth_set_real_num_tx_queues(card, num_tx_queues);
6307 }
6308 EXPORT_SYMBOL_GPL(qeth_setup_netdev);
6309
6310 static int qeth_core_probe_device(struct ccwgroup_device *gdev)
6311 {
6312         struct qeth_card *card;
6313         struct device *dev;
6314         int rc;
6315         enum qeth_discipline_id enforced_disc;
6316         char dbf_name[DBF_NAME_LEN];
6317
6318         QETH_DBF_TEXT(SETUP, 2, "probedev");
6319
6320         dev = &gdev->dev;
6321         if (!get_device(dev))
6322                 return -ENODEV;
6323
6324         QETH_DBF_TEXT_(SETUP, 2, "%s", dev_name(&gdev->dev));
6325
6326         card = qeth_alloc_card(gdev);
6327         if (!card) {
6328                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM);
6329                 rc = -ENOMEM;
6330                 goto err_dev;
6331         }
6332
6333         snprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
6334                 dev_name(&gdev->dev));
6335         card->debug = qeth_get_dbf_entry(dbf_name);
6336         if (!card->debug) {
6337                 rc = qeth_add_dbf_entry(card, dbf_name);
6338                 if (rc)
6339                         goto err_card;
6340         }
6341
6342         qeth_setup_card(card);
6343         card->dev = qeth_alloc_netdev(card);
6344         if (!card->dev) {
6345                 rc = -ENOMEM;
6346                 goto err_card;
6347         }
6348
6349         qeth_determine_capabilities(card);
6350         qeth_set_blkt_defaults(card);
6351
6352         card->qdio.no_out_queues = card->dev->num_tx_queues;
6353         rc = qeth_update_from_chp_desc(card);
6354         if (rc)
6355                 goto err_chp_desc;
6356
6357         enforced_disc = qeth_enforce_discipline(card);
6358         switch (enforced_disc) {
6359         case QETH_DISCIPLINE_UNDETERMINED:
6360                 gdev->dev.type = &qeth_generic_devtype;
6361                 break;
6362         default:
6363                 card->info.layer_enforced = true;
6364                 rc = qeth_core_load_discipline(card, enforced_disc);
6365                 if (rc)
6366                         goto err_load;
6367
6368                 gdev->dev.type = IS_OSN(card) ? &qeth_osn_devtype :
6369                                                 card->discipline->devtype;
6370                 rc = card->discipline->setup(card->gdev);
6371                 if (rc)
6372                         goto err_disc;
6373                 break;
6374         }
6375
6376         return 0;
6377
6378 err_disc:
6379         qeth_core_free_discipline(card);
6380 err_load:
6381 err_chp_desc:
6382         free_netdev(card->dev);
6383 err_card:
6384         qeth_core_free_card(card);
6385 err_dev:
6386         put_device(dev);
6387         return rc;
6388 }
6389
6390 static void qeth_core_remove_device(struct ccwgroup_device *gdev)
6391 {
6392         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6393
6394         QETH_CARD_TEXT(card, 2, "removedv");
6395
6396         if (card->discipline) {
6397                 card->discipline->remove(gdev);
6398                 qeth_core_free_discipline(card);
6399         }
6400
6401         qeth_free_qdio_queues(card);
6402
6403         free_netdev(card->dev);
6404         qeth_core_free_card(card);
6405         put_device(&gdev->dev);
6406 }
6407
6408 static int qeth_core_set_online(struct ccwgroup_device *gdev)
6409 {
6410         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6411         int rc = 0;
6412         enum qeth_discipline_id def_discipline;
6413
6414         if (!card->discipline) {
6415                 def_discipline = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
6416                                                 QETH_DISCIPLINE_LAYER2;
6417                 rc = qeth_core_load_discipline(card, def_discipline);
6418                 if (rc)
6419                         goto err;
6420                 rc = card->discipline->setup(card->gdev);
6421                 if (rc) {
6422                         qeth_core_free_discipline(card);
6423                         goto err;
6424                 }
6425         }
6426
6427         rc = qeth_set_online(card);
6428 err:
6429         return rc;
6430 }
6431
6432 static int qeth_core_set_offline(struct ccwgroup_device *gdev)
6433 {
6434         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6435
6436         return qeth_set_offline(card, false);
6437 }
6438
6439 static void qeth_core_shutdown(struct ccwgroup_device *gdev)
6440 {
6441         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6442         qeth_set_allowed_threads(card, 0, 1);
6443         if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
6444                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
6445         qeth_qdio_clear_card(card, 0);
6446         qeth_drain_output_queues(card);
6447         qdio_free(CARD_DDEV(card));
6448 }
6449
6450 static ssize_t group_store(struct device_driver *ddrv, const char *buf,
6451                            size_t count)
6452 {
6453         int err;
6454
6455         err = ccwgroup_create_dev(qeth_core_root_dev, to_ccwgroupdrv(ddrv), 3,
6456                                   buf);
6457
6458         return err ? err : count;
6459 }
6460 static DRIVER_ATTR_WO(group);
6461
6462 static struct attribute *qeth_drv_attrs[] = {
6463         &driver_attr_group.attr,
6464         NULL,
6465 };
6466 static struct attribute_group qeth_drv_attr_group = {
6467         .attrs = qeth_drv_attrs,
6468 };
6469 static const struct attribute_group *qeth_drv_attr_groups[] = {
6470         &qeth_drv_attr_group,
6471         NULL,
6472 };
6473
6474 static struct ccwgroup_driver qeth_core_ccwgroup_driver = {
6475         .driver = {
6476                 .groups = qeth_drv_attr_groups,
6477                 .owner = THIS_MODULE,
6478                 .name = "qeth",
6479         },
6480         .ccw_driver = &qeth_ccw_driver,
6481         .setup = qeth_core_probe_device,
6482         .remove = qeth_core_remove_device,
6483         .set_online = qeth_core_set_online,
6484         .set_offline = qeth_core_set_offline,
6485         .shutdown = qeth_core_shutdown,
6486 };
6487
6488 struct qeth_card *qeth_get_card_by_busid(char *bus_id)
6489 {
6490         struct ccwgroup_device *gdev;
6491         struct qeth_card *card;
6492
6493         gdev = get_ccwgroupdev_by_busid(&qeth_core_ccwgroup_driver, bus_id);
6494         if (!gdev)
6495                 return NULL;
6496
6497         card = dev_get_drvdata(&gdev->dev);
6498         put_device(&gdev->dev);
6499         return card;
6500 }
6501 EXPORT_SYMBOL_GPL(qeth_get_card_by_busid);
6502
6503 int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
6504 {
6505         struct qeth_card *card = dev->ml_priv;
6506         struct mii_ioctl_data *mii_data;
6507         int rc = 0;
6508
6509         switch (cmd) {
6510         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
6511                 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
6512                 break;
6513         case SIOC_QETH_GET_CARD_TYPE:
6514                 if ((IS_OSD(card) || IS_OSM(card) || IS_OSX(card)) &&
6515                     !IS_VM_NIC(card))
6516                         return 1;
6517                 return 0;
6518         case SIOCGMIIPHY:
6519                 mii_data = if_mii(rq);
6520                 mii_data->phy_id = 0;
6521                 break;
6522         case SIOCGMIIREG:
6523                 mii_data = if_mii(rq);
6524                 if (mii_data->phy_id != 0)
6525                         rc = -EINVAL;
6526                 else
6527                         mii_data->val_out = qeth_mdio_read(dev,
6528                                 mii_data->phy_id, mii_data->reg_num);
6529                 break;
6530         case SIOC_QETH_QUERY_OAT:
6531                 rc = qeth_query_oat_command(card, rq->ifr_ifru.ifru_data);
6532                 break;
6533         default:
6534                 if (card->discipline->do_ioctl)
6535                         rc = card->discipline->do_ioctl(dev, rq, cmd);
6536                 else
6537                         rc = -EOPNOTSUPP;
6538         }
6539         if (rc)
6540                 QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
6541         return rc;
6542 }
6543 EXPORT_SYMBOL_GPL(qeth_do_ioctl);
6544
6545 static int qeth_start_csum_cb(struct qeth_card *card, struct qeth_reply *reply,
6546                               unsigned long data)
6547 {
6548         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6549         u32 *features = reply->param;
6550
6551         if (qeth_setassparms_inspect_rc(cmd))
6552                 return -EIO;
6553
6554         *features = cmd->data.setassparms.data.flags_32bit;
6555         return 0;
6556 }
6557
6558 static int qeth_set_csum_off(struct qeth_card *card, enum qeth_ipa_funcs cstype,
6559                              enum qeth_prot_versions prot)
6560 {
6561         return qeth_send_simple_setassparms_prot(card, cstype, IPA_CMD_ASS_STOP,
6562                                                  NULL, prot);
6563 }
6564
6565 static int qeth_set_csum_on(struct qeth_card *card, enum qeth_ipa_funcs cstype,
6566                             enum qeth_prot_versions prot, u8 *lp2lp)
6567 {
6568         u32 required_features = QETH_IPA_CHECKSUM_UDP | QETH_IPA_CHECKSUM_TCP;
6569         struct qeth_cmd_buffer *iob;
6570         struct qeth_ipa_caps caps;
6571         u32 features;
6572         int rc;
6573
6574         /* some L3 HW requires combined L3+L4 csum offload: */
6575         if (IS_LAYER3(card) && prot == QETH_PROT_IPV4 &&
6576             cstype == IPA_OUTBOUND_CHECKSUM)
6577                 required_features |= QETH_IPA_CHECKSUM_IP_HDR;
6578
6579         iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_START, 0,
6580                                        prot);
6581         if (!iob)
6582                 return -ENOMEM;
6583
6584         rc = qeth_send_ipa_cmd(card, iob, qeth_start_csum_cb, &features);
6585         if (rc)
6586                 return rc;
6587
6588         if ((required_features & features) != required_features) {
6589                 qeth_set_csum_off(card, cstype, prot);
6590                 return -EOPNOTSUPP;
6591         }
6592
6593         iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_ENABLE,
6594                                        SETASS_DATA_SIZEOF(flags_32bit),
6595                                        prot);
6596         if (!iob) {
6597                 qeth_set_csum_off(card, cstype, prot);
6598                 return -ENOMEM;
6599         }
6600
6601         if (features & QETH_IPA_CHECKSUM_LP2LP)
6602                 required_features |= QETH_IPA_CHECKSUM_LP2LP;
6603         __ipa_cmd(iob)->data.setassparms.data.flags_32bit = required_features;
6604         rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6605         if (rc) {
6606                 qeth_set_csum_off(card, cstype, prot);
6607                 return rc;
6608         }
6609
6610         if (!qeth_ipa_caps_supported(&caps, required_features) ||
6611             !qeth_ipa_caps_enabled(&caps, required_features)) {
6612                 qeth_set_csum_off(card, cstype, prot);
6613                 return -EOPNOTSUPP;
6614         }
6615
6616         dev_info(&card->gdev->dev, "HW Checksumming (%sbound IPv%d) enabled\n",
6617                  cstype == IPA_INBOUND_CHECKSUM ? "in" : "out", prot);
6618
6619         if (lp2lp)
6620                 *lp2lp = qeth_ipa_caps_enabled(&caps, QETH_IPA_CHECKSUM_LP2LP);
6621
6622         return 0;
6623 }
6624
6625 static int qeth_set_ipa_csum(struct qeth_card *card, bool on, int cstype,
6626                              enum qeth_prot_versions prot, u8 *lp2lp)
6627 {
6628         return on ? qeth_set_csum_on(card, cstype, prot, lp2lp) :
6629                     qeth_set_csum_off(card, cstype, prot);
6630 }
6631
6632 static int qeth_start_tso_cb(struct qeth_card *card, struct qeth_reply *reply,
6633                              unsigned long data)
6634 {
6635         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6636         struct qeth_tso_start_data *tso_data = reply->param;
6637
6638         if (qeth_setassparms_inspect_rc(cmd))
6639                 return -EIO;
6640
6641         tso_data->mss = cmd->data.setassparms.data.tso.mss;
6642         tso_data->supported = cmd->data.setassparms.data.tso.supported;
6643         return 0;
6644 }
6645
6646 static int qeth_set_tso_off(struct qeth_card *card,
6647                             enum qeth_prot_versions prot)
6648 {
6649         return qeth_send_simple_setassparms_prot(card, IPA_OUTBOUND_TSO,
6650                                                  IPA_CMD_ASS_STOP, NULL, prot);
6651 }
6652
6653 static int qeth_set_tso_on(struct qeth_card *card,
6654                            enum qeth_prot_versions prot)
6655 {
6656         struct qeth_tso_start_data tso_data;
6657         struct qeth_cmd_buffer *iob;
6658         struct qeth_ipa_caps caps;
6659         int rc;
6660
6661         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6662                                        IPA_CMD_ASS_START, 0, prot);
6663         if (!iob)
6664                 return -ENOMEM;
6665
6666         rc = qeth_send_ipa_cmd(card, iob, qeth_start_tso_cb, &tso_data);
6667         if (rc)
6668                 return rc;
6669
6670         if (!tso_data.mss || !(tso_data.supported & QETH_IPA_LARGE_SEND_TCP)) {
6671                 qeth_set_tso_off(card, prot);
6672                 return -EOPNOTSUPP;
6673         }
6674
6675         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6676                                        IPA_CMD_ASS_ENABLE,
6677                                        SETASS_DATA_SIZEOF(caps), prot);
6678         if (!iob) {
6679                 qeth_set_tso_off(card, prot);
6680                 return -ENOMEM;
6681         }
6682
6683         /* enable TSO capability */
6684         __ipa_cmd(iob)->data.setassparms.data.caps.enabled =
6685                 QETH_IPA_LARGE_SEND_TCP;
6686         rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6687         if (rc) {
6688                 qeth_set_tso_off(card, prot);
6689                 return rc;
6690         }
6691
6692         if (!qeth_ipa_caps_supported(&caps, QETH_IPA_LARGE_SEND_TCP) ||
6693             !qeth_ipa_caps_enabled(&caps, QETH_IPA_LARGE_SEND_TCP)) {
6694                 qeth_set_tso_off(card, prot);
6695                 return -EOPNOTSUPP;
6696         }
6697
6698         dev_info(&card->gdev->dev, "TSOv%u enabled (MSS: %u)\n", prot,
6699                  tso_data.mss);
6700         return 0;
6701 }
6702
6703 static int qeth_set_ipa_tso(struct qeth_card *card, bool on,
6704                             enum qeth_prot_versions prot)
6705 {
6706         return on ? qeth_set_tso_on(card, prot) : qeth_set_tso_off(card, prot);
6707 }
6708
6709 static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on)
6710 {
6711         int rc_ipv4 = (on) ? -EOPNOTSUPP : 0;
6712         int rc_ipv6;
6713
6714         if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
6715                 rc_ipv4 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6716                                             QETH_PROT_IPV4, NULL);
6717         if (!qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6718                 /* no/one Offload Assist available, so the rc is trivial */
6719                 return rc_ipv4;
6720
6721         rc_ipv6 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6722                                     QETH_PROT_IPV6, NULL);
6723
6724         if (on)
6725                 /* enable: success if any Assist is active */
6726                 return (rc_ipv6) ? rc_ipv4 : 0;
6727
6728         /* disable: failure if any Assist is still active */
6729         return (rc_ipv6) ? rc_ipv6 : rc_ipv4;
6730 }
6731
6732 /**
6733  * qeth_enable_hw_features() - (Re-)Enable HW functions for device features
6734  * @dev:        a net_device
6735  */
6736 void qeth_enable_hw_features(struct net_device *dev)
6737 {
6738         struct qeth_card *card = dev->ml_priv;
6739         netdev_features_t features;
6740
6741         features = dev->features;
6742         /* force-off any feature that might need an IPA sequence.
6743          * netdev_update_features() will restart them.
6744          */
6745         dev->features &= ~dev->hw_features;
6746         /* toggle VLAN filter, so that VIDs are re-programmed: */
6747         if (IS_LAYER2(card) && IS_VM_NIC(card)) {
6748                 dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
6749                 dev->wanted_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
6750         }
6751         netdev_update_features(dev);
6752         if (features != dev->features)
6753                 dev_warn(&card->gdev->dev,
6754                          "Device recovery failed to restore all offload features\n");
6755 }
6756 EXPORT_SYMBOL_GPL(qeth_enable_hw_features);
6757
6758 static void qeth_check_restricted_features(struct qeth_card *card,
6759                                            netdev_features_t changed,
6760                                            netdev_features_t actual)
6761 {
6762         netdev_features_t ipv6_features = NETIF_F_TSO6;
6763         netdev_features_t ipv4_features = NETIF_F_TSO;
6764
6765         if (!card->info.has_lp2lp_cso_v6)
6766                 ipv6_features |= NETIF_F_IPV6_CSUM;
6767         if (!card->info.has_lp2lp_cso_v4)
6768                 ipv4_features |= NETIF_F_IP_CSUM;
6769
6770         if ((changed & ipv6_features) && !(actual & ipv6_features))
6771                 qeth_flush_local_addrs6(card);
6772         if ((changed & ipv4_features) && !(actual & ipv4_features))
6773                 qeth_flush_local_addrs4(card);
6774 }
6775
6776 int qeth_set_features(struct net_device *dev, netdev_features_t features)
6777 {
6778         struct qeth_card *card = dev->ml_priv;
6779         netdev_features_t changed = dev->features ^ features;
6780         int rc = 0;
6781
6782         QETH_CARD_TEXT(card, 2, "setfeat");
6783         QETH_CARD_HEX(card, 2, &features, sizeof(features));
6784
6785         if ((changed & NETIF_F_IP_CSUM)) {
6786                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IP_CSUM,
6787                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV4,
6788                                        &card->info.has_lp2lp_cso_v4);
6789                 if (rc)
6790                         changed ^= NETIF_F_IP_CSUM;
6791         }
6792         if (changed & NETIF_F_IPV6_CSUM) {
6793                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IPV6_CSUM,
6794                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV6,
6795                                        &card->info.has_lp2lp_cso_v6);
6796                 if (rc)
6797                         changed ^= NETIF_F_IPV6_CSUM;
6798         }
6799         if (changed & NETIF_F_RXCSUM) {
6800                 rc = qeth_set_ipa_rx_csum(card, features & NETIF_F_RXCSUM);
6801                 if (rc)
6802                         changed ^= NETIF_F_RXCSUM;
6803         }
6804         if (changed & NETIF_F_TSO) {
6805                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO,
6806                                       QETH_PROT_IPV4);
6807                 if (rc)
6808                         changed ^= NETIF_F_TSO;
6809         }
6810         if (changed & NETIF_F_TSO6) {
6811                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO6,
6812                                       QETH_PROT_IPV6);
6813                 if (rc)
6814                         changed ^= NETIF_F_TSO6;
6815         }
6816
6817         qeth_check_restricted_features(card, dev->features ^ features,
6818                                        dev->features ^ changed);
6819
6820         /* everything changed successfully? */
6821         if ((dev->features ^ features) == changed)
6822                 return 0;
6823         /* something went wrong. save changed features and return error */
6824         dev->features ^= changed;
6825         return -EIO;
6826 }
6827 EXPORT_SYMBOL_GPL(qeth_set_features);
6828
6829 netdev_features_t qeth_fix_features(struct net_device *dev,
6830                                     netdev_features_t features)
6831 {
6832         struct qeth_card *card = dev->ml_priv;
6833
6834         QETH_CARD_TEXT(card, 2, "fixfeat");
6835         if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM))
6836                 features &= ~NETIF_F_IP_CSUM;
6837         if (!qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6))
6838                 features &= ~NETIF_F_IPV6_CSUM;
6839         if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM) &&
6840             !qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6841                 features &= ~NETIF_F_RXCSUM;
6842         if (!qeth_is_supported(card, IPA_OUTBOUND_TSO))
6843                 features &= ~NETIF_F_TSO;
6844         if (!qeth_is_supported6(card, IPA_OUTBOUND_TSO))
6845                 features &= ~NETIF_F_TSO6;
6846
6847         QETH_CARD_HEX(card, 2, &features, sizeof(features));
6848         return features;
6849 }
6850 EXPORT_SYMBOL_GPL(qeth_fix_features);
6851
6852 netdev_features_t qeth_features_check(struct sk_buff *skb,
6853                                       struct net_device *dev,
6854                                       netdev_features_t features)
6855 {
6856         struct qeth_card *card = dev->ml_priv;
6857
6858         /* Traffic with local next-hop is not eligible for some offloads: */
6859         if (skb->ip_summed == CHECKSUM_PARTIAL &&
6860             card->options.isolation != ISOLATION_MODE_FWD) {
6861                 netdev_features_t restricted = 0;
6862
6863                 if (skb_is_gso(skb) && !netif_needs_gso(skb, features))
6864                         restricted |= NETIF_F_ALL_TSO;
6865
6866                 switch (vlan_get_protocol(skb)) {
6867                 case htons(ETH_P_IP):
6868                         if (!card->info.has_lp2lp_cso_v4)
6869                                 restricted |= NETIF_F_IP_CSUM;
6870
6871                         if (restricted && qeth_next_hop_is_local_v4(card, skb))
6872                                 features &= ~restricted;
6873                         break;
6874                 case htons(ETH_P_IPV6):
6875                         if (!card->info.has_lp2lp_cso_v6)
6876                                 restricted |= NETIF_F_IPV6_CSUM;
6877
6878                         if (restricted && qeth_next_hop_is_local_v6(card, skb))
6879                                 features &= ~restricted;
6880                         break;
6881                 default:
6882                         break;
6883                 }
6884         }
6885
6886         /* GSO segmentation builds skbs with
6887          *      a (small) linear part for the headers, and
6888          *      page frags for the data.
6889          * Compared to a linear skb, the header-only part consumes an
6890          * additional buffer element. This reduces buffer utilization, and
6891          * hurts throughput. So compress small segments into one element.
6892          */
6893         if (netif_needs_gso(skb, features)) {
6894                 /* match skb_segment(): */
6895                 unsigned int doffset = skb->data - skb_mac_header(skb);
6896                 unsigned int hsize = skb_shinfo(skb)->gso_size;
6897                 unsigned int hroom = skb_headroom(skb);
6898
6899                 /* linearize only if resulting skb allocations are order-0: */
6900                 if (SKB_DATA_ALIGN(hroom + doffset + hsize) <= SKB_MAX_HEAD(0))
6901                         features &= ~NETIF_F_SG;
6902         }
6903
6904         return vlan_features_check(skb, features);
6905 }
6906 EXPORT_SYMBOL_GPL(qeth_features_check);
6907
6908 void qeth_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
6909 {
6910         struct qeth_card *card = dev->ml_priv;
6911         struct qeth_qdio_out_q *queue;
6912         unsigned int i;
6913
6914         QETH_CARD_TEXT(card, 5, "getstat");
6915
6916         stats->rx_packets = card->stats.rx_packets;
6917         stats->rx_bytes = card->stats.rx_bytes;
6918         stats->rx_errors = card->stats.rx_length_errors +
6919                            card->stats.rx_frame_errors +
6920                            card->stats.rx_fifo_errors;
6921         stats->rx_dropped = card->stats.rx_dropped_nomem +
6922                             card->stats.rx_dropped_notsupp +
6923                             card->stats.rx_dropped_runt;
6924         stats->multicast = card->stats.rx_multicast;
6925         stats->rx_length_errors = card->stats.rx_length_errors;
6926         stats->rx_frame_errors = card->stats.rx_frame_errors;
6927         stats->rx_fifo_errors = card->stats.rx_fifo_errors;
6928
6929         for (i = 0; i < card->qdio.no_out_queues; i++) {
6930                 queue = card->qdio.out_qs[i];
6931
6932                 stats->tx_packets += queue->stats.tx_packets;
6933                 stats->tx_bytes += queue->stats.tx_bytes;
6934                 stats->tx_errors += queue->stats.tx_errors;
6935                 stats->tx_dropped += queue->stats.tx_dropped;
6936         }
6937 }
6938 EXPORT_SYMBOL_GPL(qeth_get_stats64);
6939
6940 #define TC_IQD_UCAST   0
6941 static void qeth_iqd_set_prio_tc_map(struct net_device *dev,
6942                                      unsigned int ucast_txqs)
6943 {
6944         unsigned int prio;
6945
6946         /* IQD requires mcast traffic to be placed on a dedicated queue, and
6947          * qeth_iqd_select_queue() deals with this.
6948          * For unicast traffic, we defer the queue selection to the stack.
6949          * By installing a trivial prio map that spans over only the unicast
6950          * queues, we can encourage the stack to spread the ucast traffic evenly
6951          * without selecting the mcast queue.
6952          */
6953
6954         /* One traffic class, spanning over all active ucast queues: */
6955         netdev_set_num_tc(dev, 1);
6956         netdev_set_tc_queue(dev, TC_IQD_UCAST, ucast_txqs,
6957                             QETH_IQD_MIN_UCAST_TXQ);
6958
6959         /* Map all priorities to this traffic class: */
6960         for (prio = 0; prio <= TC_BITMASK; prio++)
6961                 netdev_set_prio_tc_map(dev, prio, TC_IQD_UCAST);
6962 }
6963
6964 int qeth_set_real_num_tx_queues(struct qeth_card *card, unsigned int count)
6965 {
6966         struct net_device *dev = card->dev;
6967         int rc;
6968
6969         /* Per netif_setup_tc(), adjust the mapping first: */
6970         if (IS_IQD(card))
6971                 qeth_iqd_set_prio_tc_map(dev, count - 1);
6972
6973         rc = netif_set_real_num_tx_queues(dev, count);
6974
6975         if (rc && IS_IQD(card))
6976                 qeth_iqd_set_prio_tc_map(dev, dev->real_num_tx_queues - 1);
6977
6978         return rc;
6979 }
6980
6981 u16 qeth_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
6982                           u8 cast_type, struct net_device *sb_dev)
6983 {
6984         u16 txq;
6985
6986         if (cast_type != RTN_UNICAST)
6987                 return QETH_IQD_MCAST_TXQ;
6988         if (dev->real_num_tx_queues == QETH_IQD_MIN_TXQ)
6989                 return QETH_IQD_MIN_UCAST_TXQ;
6990
6991         txq = netdev_pick_tx(dev, skb, sb_dev);
6992         return (txq == QETH_IQD_MCAST_TXQ) ? QETH_IQD_MIN_UCAST_TXQ : txq;
6993 }
6994 EXPORT_SYMBOL_GPL(qeth_iqd_select_queue);
6995
6996 int qeth_open(struct net_device *dev)
6997 {
6998         struct qeth_card *card = dev->ml_priv;
6999
7000         QETH_CARD_TEXT(card, 4, "qethopen");
7001
7002         card->data.state = CH_STATE_UP;
7003         netif_tx_start_all_queues(dev);
7004
7005         napi_enable(&card->napi);
7006         local_bh_disable();
7007         napi_schedule(&card->napi);
7008         if (IS_IQD(card)) {
7009                 struct qeth_qdio_out_q *queue;
7010                 unsigned int i;
7011
7012                 qeth_for_each_output_queue(card, queue, i) {
7013                         netif_tx_napi_add(dev, &queue->napi, qeth_tx_poll,
7014                                           QETH_NAPI_WEIGHT);
7015                         napi_enable(&queue->napi);
7016                         napi_schedule(&queue->napi);
7017                 }
7018         }
7019         /* kick-start the NAPI softirq: */
7020         local_bh_enable();
7021         return 0;
7022 }
7023 EXPORT_SYMBOL_GPL(qeth_open);
7024
7025 int qeth_stop(struct net_device *dev)
7026 {
7027         struct qeth_card *card = dev->ml_priv;
7028
7029         QETH_CARD_TEXT(card, 4, "qethstop");
7030         if (IS_IQD(card)) {
7031                 struct qeth_qdio_out_q *queue;
7032                 unsigned int i;
7033
7034                 /* Quiesce the NAPI instances: */
7035                 qeth_for_each_output_queue(card, queue, i)
7036                         napi_disable(&queue->napi);
7037
7038                 /* Stop .ndo_start_xmit, might still access queue->napi. */
7039                 netif_tx_disable(dev);
7040
7041                 qeth_for_each_output_queue(card, queue, i) {
7042                         del_timer_sync(&queue->timer);
7043                         /* Queues may get re-allocated, so remove the NAPIs. */
7044                         netif_napi_del(&queue->napi);
7045                 }
7046         } else {
7047                 netif_tx_disable(dev);
7048         }
7049
7050         napi_disable(&card->napi);
7051         qdio_stop_irq(CARD_DDEV(card));
7052
7053         return 0;
7054 }
7055 EXPORT_SYMBOL_GPL(qeth_stop);
7056
7057 static int __init qeth_core_init(void)
7058 {
7059         int rc;
7060
7061         pr_info("loading core functions\n");
7062
7063         qeth_debugfs_root = debugfs_create_dir("qeth", NULL);
7064
7065         rc = qeth_register_dbf_views();
7066         if (rc)
7067                 goto dbf_err;
7068         qeth_core_root_dev = root_device_register("qeth");
7069         rc = PTR_ERR_OR_ZERO(qeth_core_root_dev);
7070         if (rc)
7071                 goto register_err;
7072         qeth_core_header_cache =
7073                 kmem_cache_create("qeth_hdr", QETH_HDR_CACHE_OBJ_SIZE,
7074                                   roundup_pow_of_two(QETH_HDR_CACHE_OBJ_SIZE),
7075                                   0, NULL);
7076         if (!qeth_core_header_cache) {
7077                 rc = -ENOMEM;
7078                 goto slab_err;
7079         }
7080         qeth_qdio_outbuf_cache = kmem_cache_create("qeth_buf",
7081                         sizeof(struct qeth_qdio_out_buffer), 0, 0, NULL);
7082         if (!qeth_qdio_outbuf_cache) {
7083                 rc = -ENOMEM;
7084                 goto cqslab_err;
7085         }
7086         rc = ccw_driver_register(&qeth_ccw_driver);
7087         if (rc)
7088                 goto ccw_err;
7089         rc = ccwgroup_driver_register(&qeth_core_ccwgroup_driver);
7090         if (rc)
7091                 goto ccwgroup_err;
7092
7093         return 0;
7094
7095 ccwgroup_err:
7096         ccw_driver_unregister(&qeth_ccw_driver);
7097 ccw_err:
7098         kmem_cache_destroy(qeth_qdio_outbuf_cache);
7099 cqslab_err:
7100         kmem_cache_destroy(qeth_core_header_cache);
7101 slab_err:
7102         root_device_unregister(qeth_core_root_dev);
7103 register_err:
7104         qeth_unregister_dbf_views();
7105 dbf_err:
7106         debugfs_remove_recursive(qeth_debugfs_root);
7107         pr_err("Initializing the qeth device driver failed\n");
7108         return rc;
7109 }
7110
7111 static void __exit qeth_core_exit(void)
7112 {
7113         qeth_clear_dbf_list();
7114         ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver);
7115         ccw_driver_unregister(&qeth_ccw_driver);
7116         kmem_cache_destroy(qeth_qdio_outbuf_cache);
7117         kmem_cache_destroy(qeth_core_header_cache);
7118         root_device_unregister(qeth_core_root_dev);
7119         qeth_unregister_dbf_views();
7120         debugfs_remove_recursive(qeth_debugfs_root);
7121         pr_info("core functions removed\n");
7122 }
7123
7124 module_init(qeth_core_init);
7125 module_exit(qeth_core_exit);
7126 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
7127 MODULE_DESCRIPTION("qeth core functions");
7128 MODULE_LICENSE("GPL");