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/skbuff.h>
  30 #include <linux/vmalloc.h>
  31
  32 #include <net/iucv/af_iucv.h>
  33 #include <net/dsfield.h>
  34
  35 #include <asm/ebcdic.h>
  36 #include <asm/chpid.h>
  37 #include <asm/io.h>
  38 #include <asm/sysinfo.h>
  39 #include <asm/diag.h>
  40 #include <asm/cio.h>
  41 #include <asm/ccwdev.h>
  42 #include <asm/cpcmd.h>
  43
  44 #include "qeth_core.h"
  45
  46 struct qeth_dbf_info qeth_dbf[QETH_DBF_INFOS] = {
  47         /* define dbf - Name, Pages, Areas, Maxlen, Level, View, Handle */
  48         /*                   N  P  A    M  L  V                      H  */
  49         [QETH_DBF_SETUP] = {"qeth_setup",
  50                                 8, 1,   8, 5, &debug_hex_ascii_view, NULL},
  51         [QETH_DBF_MSG]   = {"qeth_msg", 8, 1, 11 * sizeof(long), 3,
  52                             &debug_sprintf_view, NULL},
  53         [QETH_DBF_CTRL]  = {"qeth_control",
  54                 8, 1, QETH_DBF_CTRL_LEN, 5, &debug_hex_ascii_view, NULL},
  55 };
  56 EXPORT_SYMBOL_GPL(qeth_dbf);
  57
  58 struct kmem_cache *qeth_core_header_cache;
  59 EXPORT_SYMBOL_GPL(qeth_core_header_cache);
  60 static struct kmem_cache *qeth_qdio_outbuf_cache;
  61
  62 static struct device *qeth_core_root_dev;
  63 static struct lock_class_key qdio_out_skb_queue_key;
  64
  65 static void qeth_issue_next_read_cb(struct qeth_card *card,
  66                                     struct qeth_cmd_buffer *iob,
  67                                     unsigned int data_length);
  68 static void qeth_free_buffer_pool(struct qeth_card *);
  69 static int qeth_qdio_establish(struct qeth_card *);
  70 static void qeth_free_qdio_queues(struct qeth_card *card);
  71 static void qeth_notify_skbs(struct qeth_qdio_out_q *queue,
  72                 struct qeth_qdio_out_buffer *buf,
  73                 enum iucv_tx_notify notification);
  74 static void qeth_tx_complete_buf(struct qeth_qdio_out_buffer *buf, bool error,
  75                                  int budget);
  76 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *, int);
  77
  78 static void qeth_close_dev_handler(struct work_struct *work)
  79 {
  80         struct qeth_card *card;
  81
  82         card = container_of(work, struct qeth_card, close_dev_work);
  83         QETH_CARD_TEXT(card, 2, "cldevhdl");
  84         ccwgroup_set_offline(card->gdev);
  85 }
  86
  87 static const char *qeth_get_cardname(struct qeth_card *card)
  88 {
  89         if (IS_VM_NIC(card)) {
  90                 switch (card->info.type) {
  91                 case QETH_CARD_TYPE_OSD:
  92                         return " Virtual NIC QDIO";
  93                 case QETH_CARD_TYPE_IQD:
  94                         return " Virtual NIC Hiper";
  95                 case QETH_CARD_TYPE_OSM:
  96                         return " Virtual NIC QDIO - OSM";
  97                 case QETH_CARD_TYPE_OSX:
  98                         return " Virtual NIC QDIO - OSX";
  99                 default:
 100                         return " unknown";
 101                 }
 102         } else {
 103                 switch (card->info.type) {
 104                 case QETH_CARD_TYPE_OSD:
 105                         return " OSD Express";
 106                 case QETH_CARD_TYPE_IQD:
 107                         return " HiperSockets";
 108                 case QETH_CARD_TYPE_OSN:
 109                         return " OSN QDIO";
 110                 case QETH_CARD_TYPE_OSM:
 111                         return " OSM QDIO";
 112                 case QETH_CARD_TYPE_OSX:
 113                         return " OSX QDIO";
 114                 default:
 115                         return " unknown";
 116                 }
 117         }
 118         return " n/a";
 119 }
 120
 121 /* max length to be returned: 14 */
 122 const char *qeth_get_cardname_short(struct qeth_card *card)
 123 {
 124         if (IS_VM_NIC(card)) {
 125                 switch (card->info.type) {
 126                 case QETH_CARD_TYPE_OSD:
 127                         return "Virt.NIC QDIO";
 128                 case QETH_CARD_TYPE_IQD:
 129                         return "Virt.NIC Hiper";
 130                 case QETH_CARD_TYPE_OSM:
 131                         return "Virt.NIC OSM";
 132                 case QETH_CARD_TYPE_OSX:
 133                         return "Virt.NIC OSX";
 134                 default:
 135                         return "unknown";
 136                 }
 137         } else {
 138                 switch (card->info.type) {
 139                 case QETH_CARD_TYPE_OSD:
 140                         switch (card->info.link_type) {
 141                         case QETH_LINK_TYPE_FAST_ETH:
 142                                 return "OSD_100";
 143                         case QETH_LINK_TYPE_HSTR:
 144                                 return "HSTR";
 145                         case QETH_LINK_TYPE_GBIT_ETH:
 146                                 return "OSD_1000";
 147                         case QETH_LINK_TYPE_10GBIT_ETH:
 148                                 return "OSD_10GIG";
 149                         case QETH_LINK_TYPE_25GBIT_ETH:
 150                                 return "OSD_25GIG";
 151                         case QETH_LINK_TYPE_LANE_ETH100:
 152                                 return "OSD_FE_LANE";
 153                         case QETH_LINK_TYPE_LANE_TR:
 154                                 return "OSD_TR_LANE";
 155                         case QETH_LINK_TYPE_LANE_ETH1000:
 156                                 return "OSD_GbE_LANE";
 157                         case QETH_LINK_TYPE_LANE:
 158                                 return "OSD_ATM_LANE";
 159                         default:
 160                                 return "OSD_Express";
 161                         }
 162                 case QETH_CARD_TYPE_IQD:
 163                         return "HiperSockets";
 164                 case QETH_CARD_TYPE_OSN:
 165                         return "OSN";
 166                 case QETH_CARD_TYPE_OSM:
 167                         return "OSM_1000";
 168                 case QETH_CARD_TYPE_OSX:
 169                         return "OSX_10GIG";
 170                 default:
 171                         return "unknown";
 172                 }
 173         }
 174         return "n/a";
 175 }
 176
 177 void qeth_set_allowed_threads(struct qeth_card *card, unsigned long threads,
 178                          int clear_start_mask)
 179 {
 180         unsigned long flags;
 181
 182         spin_lock_irqsave(&card->thread_mask_lock, flags);
 183         card->thread_allowed_mask = threads;
 184         if (clear_start_mask)
 185                 card->thread_start_mask &= threads;
 186         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 187         wake_up(&card->wait_q);
 188 }
 189 EXPORT_SYMBOL_GPL(qeth_set_allowed_threads);
 190
 191 int qeth_threads_running(struct qeth_card *card, unsigned long threads)
 192 {
 193         unsigned long flags;
 194         int rc = 0;
 195
 196         spin_lock_irqsave(&card->thread_mask_lock, flags);
 197         rc = (card->thread_running_mask & threads);
 198         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 199         return rc;
 200 }
 201 EXPORT_SYMBOL_GPL(qeth_threads_running);
 202
 203 void qeth_clear_working_pool_list(struct qeth_card *card)
 204 {
 205         struct qeth_buffer_pool_entry *pool_entry, *tmp;
 206
 207         QETH_CARD_TEXT(card, 5, "clwrklst");
 208         list_for_each_entry_safe(pool_entry, tmp,
 209                             &card->qdio.in_buf_pool.entry_list, list){
 210                         list_del(&pool_entry->list);
 211         }
 212 }
 213 EXPORT_SYMBOL_GPL(qeth_clear_working_pool_list);
 214
 215 static int qeth_alloc_buffer_pool(struct qeth_card *card)
 216 {
 217         struct qeth_buffer_pool_entry *pool_entry;
 218         void *ptr;
 219         int i, j;
 220
 221         QETH_CARD_TEXT(card, 5, "alocpool");
 222         for (i = 0; i < card->qdio.init_pool.buf_count; ++i) {
 223                 pool_entry = kzalloc(sizeof(*pool_entry), GFP_KERNEL);
 224                 if (!pool_entry) {
 225                         qeth_free_buffer_pool(card);
 226                         return -ENOMEM;
 227                 }
 228                 for (j = 0; j < QETH_MAX_BUFFER_ELEMENTS(card); ++j) {
 229                         ptr = (void *) __get_free_page(GFP_KERNEL);
 230                         if (!ptr) {
 231                                 while (j > 0)
 232                                         free_page((unsigned long)
 233                                                   pool_entry->elements[--j]);
 234                                 kfree(pool_entry);
 235                                 qeth_free_buffer_pool(card);
 236                                 return -ENOMEM;
 237                         }
 238                         pool_entry->elements[j] = ptr;
 239                 }
 240                 list_add(&pool_entry->init_list,
 241                          &card->qdio.init_pool.entry_list);
 242         }
 243         return 0;
 244 }
 245
 246 int qeth_realloc_buffer_pool(struct qeth_card *card, int bufcnt)
 247 {
 248         QETH_CARD_TEXT(card, 2, "realcbp");
 249
 250         if (card->state != CARD_STATE_DOWN)
 251                 return -EPERM;
 252
 253         /* TODO: steel/add buffers from/to a running card's buffer pool (?) */
 254         qeth_clear_working_pool_list(card);
 255         qeth_free_buffer_pool(card);
 256         card->qdio.in_buf_pool.buf_count = bufcnt;
 257         card->qdio.init_pool.buf_count = bufcnt;
 258         return qeth_alloc_buffer_pool(card);
 259 }
 260 EXPORT_SYMBOL_GPL(qeth_realloc_buffer_pool);
 261
 262 static void qeth_free_qdio_queue(struct qeth_qdio_q *q)
 263 {
 264         if (!q)
 265                 return;
 266
 267         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
 268         kfree(q);
 269 }
 270
 271 static struct qeth_qdio_q *qeth_alloc_qdio_queue(void)
 272 {
 273         struct qeth_qdio_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
 274         int i;
 275
 276         if (!q)
 277                 return NULL;
 278
 279         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
 280                 kfree(q);
 281                 return NULL;
 282         }
 283
 284         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i)
 285                 q->bufs[i].buffer = q->qdio_bufs[i];
 286
 287         QETH_DBF_HEX(SETUP, 2, &q, sizeof(void *));
 288         return q;
 289 }
 290
 291 static int qeth_cq_init(struct qeth_card *card)
 292 {
 293         int rc;
 294
 295         if (card->options.cq == QETH_CQ_ENABLED) {
 296                 QETH_CARD_TEXT(card, 2, "cqinit");
 297                 qdio_reset_buffers(card->qdio.c_q->qdio_bufs,
 298                                    QDIO_MAX_BUFFERS_PER_Q);
 299                 card->qdio.c_q->next_buf_to_init = 127;
 300                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT,
 301                              card->qdio.no_in_queues - 1, 0,
 302                              127);
 303                 if (rc) {
 304                         QETH_CARD_TEXT_(card, 2, "1err%d", rc);
 305                         goto out;
 306                 }
 307         }
 308         rc = 0;
 309 out:
 310         return rc;
 311 }
 312
 313 static int qeth_alloc_cq(struct qeth_card *card)
 314 {
 315         int rc;
 316
 317         if (card->options.cq == QETH_CQ_ENABLED) {
 318                 int i;
 319                 struct qdio_outbuf_state *outbuf_states;
 320
 321                 QETH_CARD_TEXT(card, 2, "cqon");
 322                 card->qdio.c_q = qeth_alloc_qdio_queue();
 323                 if (!card->qdio.c_q) {
 324                         rc = -1;
 325                         goto kmsg_out;
 326                 }
 327                 card->qdio.no_in_queues = 2;
 328                 card->qdio.out_bufstates =
 329                         kcalloc(card->qdio.no_out_queues *
 330                                         QDIO_MAX_BUFFERS_PER_Q,
 331                                 sizeof(struct qdio_outbuf_state),
 332                                 GFP_KERNEL);
 333                 outbuf_states = card->qdio.out_bufstates;
 334                 if (outbuf_states == NULL) {
 335                         rc = -1;
 336                         goto free_cq_out;
 337                 }
 338                 for (i = 0; i < card->qdio.no_out_queues; ++i) {
 339                         card->qdio.out_qs[i]->bufstates = outbuf_states;
 340                         outbuf_states += QDIO_MAX_BUFFERS_PER_Q;
 341                 }
 342         } else {
 343                 QETH_CARD_TEXT(card, 2, "nocq");
 344                 card->qdio.c_q = NULL;
 345                 card->qdio.no_in_queues = 1;
 346         }
 347         QETH_CARD_TEXT_(card, 2, "iqc%d", card->qdio.no_in_queues);
 348         rc = 0;
 349 out:
 350         return rc;
 351 free_cq_out:
 352         qeth_free_qdio_queue(card->qdio.c_q);
 353         card->qdio.c_q = NULL;
 354 kmsg_out:
 355         dev_err(&card->gdev->dev, "Failed to create completion queue\n");
 356         goto out;
 357 }
 358
 359 static void qeth_free_cq(struct qeth_card *card)
 360 {
 361         if (card->qdio.c_q) {
 362                 --card->qdio.no_in_queues;
 363                 qeth_free_qdio_queue(card->qdio.c_q);
 364                 card->qdio.c_q = NULL;
 365         }
 366         kfree(card->qdio.out_bufstates);
 367         card->qdio.out_bufstates = NULL;
 368 }
 369
 370 static enum iucv_tx_notify qeth_compute_cq_notification(int sbalf15,
 371                                                         int delayed)
 372 {
 373         enum iucv_tx_notify n;
 374
 375         switch (sbalf15) {
 376         case 0:
 377                 n = delayed ? TX_NOTIFY_DELAYED_OK : TX_NOTIFY_OK;
 378                 break;
 379         case 4:
 380         case 16:
 381         case 17:
 382         case 18:
 383                 n = delayed ? TX_NOTIFY_DELAYED_UNREACHABLE :
 384                         TX_NOTIFY_UNREACHABLE;
 385                 break;
 386         default:
 387                 n = delayed ? TX_NOTIFY_DELAYED_GENERALERROR :
 388                         TX_NOTIFY_GENERALERROR;
 389                 break;
 390         }
 391
 392         return n;
 393 }
 394
 395 static void qeth_cleanup_handled_pending(struct qeth_qdio_out_q *q, int bidx,
 396                                          int forced_cleanup)
 397 {
 398         if (q->card->options.cq != QETH_CQ_ENABLED)
 399                 return;
 400
 401         if (q->bufs[bidx]->next_pending != NULL) {
 402                 struct qeth_qdio_out_buffer *head = q->bufs[bidx];
 403                 struct qeth_qdio_out_buffer *c = q->bufs[bidx]->next_pending;
 404
 405                 while (c) {
 406                         if (forced_cleanup ||
 407                             atomic_read(&c->state) ==
 408                               QETH_QDIO_BUF_HANDLED_DELAYED) {
 409                                 struct qeth_qdio_out_buffer *f = c;
 410                                 QETH_CARD_TEXT(f->q->card, 5, "fp");
 411                                 QETH_CARD_TEXT_(f->q->card, 5, "%lx", (long) f);
 412                                 /* release here to avoid interleaving between
 413                                    outbound tasklet and inbound tasklet
 414                                    regarding notifications and lifecycle */
 415                                 qeth_tx_complete_buf(c, forced_cleanup, 0);
 416
 417                                 c = f->next_pending;
 418                                 WARN_ON_ONCE(head->next_pending != f);
 419                                 head->next_pending = c;
 420                                 kmem_cache_free(qeth_qdio_outbuf_cache, f);
 421                         } else {
 422                                 head = c;
 423                                 c = c->next_pending;
 424                         }
 425
 426                 }
 427         }
 428         if (forced_cleanup && (atomic_read(&(q->bufs[bidx]->state)) ==
 429                                         QETH_QDIO_BUF_HANDLED_DELAYED)) {
 430                 /* for recovery situations */
 431                 qeth_init_qdio_out_buf(q, bidx);
 432                 QETH_CARD_TEXT(q->card, 2, "clprecov");
 433         }
 434 }
 435
 436
 437 static void qeth_qdio_handle_aob(struct qeth_card *card,
 438                                  unsigned long phys_aob_addr)
 439 {
 440         struct qaob *aob;
 441         struct qeth_qdio_out_buffer *buffer;
 442         enum iucv_tx_notify notification;
 443         unsigned int i;
 444
 445         aob = (struct qaob *) phys_to_virt(phys_aob_addr);
 446         QETH_CARD_TEXT(card, 5, "haob");
 447         QETH_CARD_TEXT_(card, 5, "%lx", phys_aob_addr);
 448         buffer = (struct qeth_qdio_out_buffer *) aob->user1;
 449         QETH_CARD_TEXT_(card, 5, "%lx", aob->user1);
 450
 451         if (atomic_cmpxchg(&buffer->state, QETH_QDIO_BUF_PRIMED,
 452                            QETH_QDIO_BUF_IN_CQ) == QETH_QDIO_BUF_PRIMED) {
 453                 notification = TX_NOTIFY_OK;
 454         } else {
 455                 WARN_ON_ONCE(atomic_read(&buffer->state) !=
 456                                                         QETH_QDIO_BUF_PENDING);
 457                 atomic_set(&buffer->state, QETH_QDIO_BUF_IN_CQ);
 458                 notification = TX_NOTIFY_DELAYED_OK;
 459         }
 460
 461         if (aob->aorc != 0)  {
 462                 QETH_CARD_TEXT_(card, 2, "aorc%02X", aob->aorc);
 463                 notification = qeth_compute_cq_notification(aob->aorc, 1);
 464         }
 465         qeth_notify_skbs(buffer->q, buffer, notification);
 466
 467         /* Free dangling allocations. The attached skbs are handled by
 468          * qeth_cleanup_handled_pending().
 469          */
 470         for (i = 0;
 471              i < aob->sb_count && i < QETH_MAX_BUFFER_ELEMENTS(card);
 472              i++) {
 473                 if (aob->sba[i] && buffer->is_header[i])
 474                         kmem_cache_free(qeth_core_header_cache,
 475                                         (void *) aob->sba[i]);
 476         }
 477         atomic_set(&buffer->state, QETH_QDIO_BUF_HANDLED_DELAYED);
 478
 479         qdio_release_aob(aob);
 480 }
 481
 482 static inline int qeth_is_cq(struct qeth_card *card, unsigned int queue)
 483 {
 484         return card->options.cq == QETH_CQ_ENABLED &&
 485             card->qdio.c_q != NULL &&
 486             queue != 0 &&
 487             queue == card->qdio.no_in_queues - 1;
 488 }
 489
 490 static void qeth_setup_ccw(struct ccw1 *ccw, u8 cmd_code, u8 flags, u32 len,
 491                            void *data)
 492 {
 493         ccw->cmd_code = cmd_code;
 494         ccw->flags = flags | CCW_FLAG_SLI;
 495         ccw->count = len;
 496         ccw->cda = (__u32) __pa(data);
 497 }
 498
 499 static int __qeth_issue_next_read(struct qeth_card *card)
 500 {
 501         struct qeth_cmd_buffer *iob = card->read_cmd;
 502         struct qeth_channel *channel = iob->channel;
 503         struct ccw1 *ccw = __ccw_from_cmd(iob);
 504         int rc;
 505
 506         QETH_CARD_TEXT(card, 5, "issnxrd");
 507         if (channel->state != CH_STATE_UP)
 508                 return -EIO;
 509
 510         memset(iob->data, 0, iob->length);
 511         qeth_setup_ccw(ccw, CCW_CMD_READ, 0, iob->length, iob->data);
 512         iob->callback = qeth_issue_next_read_cb;
 513         /* keep the cmd alive after completion: */
 514         qeth_get_cmd(iob);
 515
 516         QETH_CARD_TEXT(card, 6, "noirqpnd");
 517         rc = ccw_device_start(channel->ccwdev, ccw, (addr_t) iob, 0, 0);
 518         if (rc) {
 519                 QETH_DBF_MESSAGE(2, "error %i on device %x when starting next read ccw!\n",
 520                                  rc, CARD_DEVID(card));
 521                 atomic_set(&channel->irq_pending, 0);
 522                 qeth_put_cmd(iob);
 523                 card->read_or_write_problem = 1;
 524                 qeth_schedule_recovery(card);
 525                 wake_up(&card->wait_q);
 526         }
 527         return rc;
 528 }
 529
 530 static int qeth_issue_next_read(struct qeth_card *card)
 531 {
 532         int ret;
 533
 534         spin_lock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 535         ret = __qeth_issue_next_read(card);
 536         spin_unlock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 537
 538         return ret;
 539 }
 540
 541 static void qeth_enqueue_cmd(struct qeth_card *card,
 542                              struct qeth_cmd_buffer *iob)
 543 {
 544         spin_lock_irq(&card->lock);
 545         list_add_tail(&iob->list, &card->cmd_waiter_list);
 546         spin_unlock_irq(&card->lock);
 547 }
 548
 549 static void qeth_dequeue_cmd(struct qeth_card *card,
 550                              struct qeth_cmd_buffer *iob)
 551 {
 552         spin_lock_irq(&card->lock);
 553         list_del(&iob->list);
 554         spin_unlock_irq(&card->lock);
 555 }
 556
 557 void qeth_notify_cmd(struct qeth_cmd_buffer *iob, int reason)
 558 {
 559         iob->rc = reason;
 560         complete(&iob->done);
 561 }
 562 EXPORT_SYMBOL_GPL(qeth_notify_cmd);
 563
 564 static void qeth_issue_ipa_msg(struct qeth_ipa_cmd *cmd, int rc,
 565                 struct qeth_card *card)
 566 {
 567         const char *ipa_name;
 568         int com = cmd->hdr.command;
 569         ipa_name = qeth_get_ipa_cmd_name(com);
 570
 571         if (rc)
 572                 QETH_DBF_MESSAGE(2, "IPA: %s(%#x) for device %x returned %#x \"%s\"\n",
 573                                  ipa_name, com, CARD_DEVID(card), rc,
 574                                  qeth_get_ipa_msg(rc));
 575         else
 576                 QETH_DBF_MESSAGE(5, "IPA: %s(%#x) for device %x succeeded\n",
 577                                  ipa_name, com, CARD_DEVID(card));
 578 }
 579
 580 static struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card,
 581                                                 struct qeth_ipa_cmd *cmd)
 582 {
 583         QETH_CARD_TEXT(card, 5, "chkipad");
 584
 585         if (IS_IPA_REPLY(cmd)) {
 586                 if (cmd->hdr.command != IPA_CMD_SETCCID &&
 587                     cmd->hdr.command != IPA_CMD_DELCCID &&
 588                     cmd->hdr.command != IPA_CMD_MODCCID &&
 589                     cmd->hdr.command != IPA_CMD_SET_DIAG_ASS)
 590                         qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
 591                 return cmd;
 592         }
 593
 594         /* handle unsolicited event: */
 595         switch (cmd->hdr.command) {
 596         case IPA_CMD_STOPLAN:
 597                 if (cmd->hdr.return_code == IPA_RC_VEPA_TO_VEB_TRANSITION) {
 598                         dev_err(&card->gdev->dev,
 599                                 "Interface %s is down because the adjacent port is no longer in reflective relay mode\n",
 600                                 QETH_CARD_IFNAME(card));
 601                         schedule_work(&card->close_dev_work);
 602                 } else {
 603                         dev_warn(&card->gdev->dev,
 604                                  "The link for interface %s on CHPID 0x%X failed\n",
 605                                  QETH_CARD_IFNAME(card), card->info.chpid);
 606                         qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
 607                         netif_carrier_off(card->dev);
 608                 }
 609                 return NULL;
 610         case IPA_CMD_STARTLAN:
 611                 dev_info(&card->gdev->dev,
 612                          "The link for %s on CHPID 0x%X has been restored\n",
 613                          QETH_CARD_IFNAME(card), card->info.chpid);
 614                 if (card->info.hwtrap)
 615                         card->info.hwtrap = 2;
 616                 qeth_schedule_recovery(card);
 617                 return NULL;
 618         case IPA_CMD_SETBRIDGEPORT_IQD:
 619         case IPA_CMD_SETBRIDGEPORT_OSA:
 620         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
 621                 if (card->discipline->control_event_handler(card, cmd))
 622                         return cmd;
 623                 return NULL;
 624         case IPA_CMD_MODCCID:
 625                 return cmd;
 626         case IPA_CMD_REGISTER_LOCAL_ADDR:
 627                 QETH_CARD_TEXT(card, 3, "irla");
 628                 return NULL;
 629         case IPA_CMD_UNREGISTER_LOCAL_ADDR:
 630                 QETH_CARD_TEXT(card, 3, "urla");
 631                 return NULL;
 632         default:
 633                 QETH_DBF_MESSAGE(2, "Received data is IPA but not a reply!\n");
 634                 return cmd;
 635         }
 636 }
 637
 638 void qeth_clear_ipacmd_list(struct qeth_card *card)
 639 {
 640         struct qeth_cmd_buffer *iob;
 641         unsigned long flags;
 642
 643         QETH_CARD_TEXT(card, 4, "clipalst");
 644
 645         spin_lock_irqsave(&card->lock, flags);
 646         list_for_each_entry(iob, &card->cmd_waiter_list, list)
 647                 qeth_notify_cmd(iob, -EIO);
 648         spin_unlock_irqrestore(&card->lock, flags);
 649 }
 650 EXPORT_SYMBOL_GPL(qeth_clear_ipacmd_list);
 651
 652 static int qeth_check_idx_response(struct qeth_card *card,
 653         unsigned char *buffer)
 654 {
 655         QETH_DBF_HEX(CTRL, 2, buffer, QETH_DBF_CTRL_LEN);
 656         if ((buffer[2] & 0xc0) == 0xc0) {
 657                 QETH_DBF_MESSAGE(2, "received an IDX TERMINATE with cause code %#04x\n",
 658                                  buffer[4]);
 659                 QETH_CARD_TEXT(card, 2, "ckidxres");
 660                 QETH_CARD_TEXT(card, 2, " idxterm");
 661                 QETH_CARD_TEXT_(card, 2, "  rc%d", -EIO);
 662                 if (buffer[4] == 0xf6) {
 663                         dev_err(&card->gdev->dev,
 664                         "The qeth device is not configured "
 665                         "for the OSI layer required by z/VM\n");
 666                         return -EPERM;
 667                 }
 668                 return -EIO;
 669         }
 670         return 0;
 671 }
 672
 673 void qeth_put_cmd(struct qeth_cmd_buffer *iob)
 674 {
 675         if (refcount_dec_and_test(&iob->ref_count)) {
 676                 kfree(iob->data);
 677                 kfree(iob);
 678         }
 679 }
 680 EXPORT_SYMBOL_GPL(qeth_put_cmd);
 681
 682 static void qeth_release_buffer_cb(struct qeth_card *card,
 683                                    struct qeth_cmd_buffer *iob,
 684                                    unsigned int data_length)
 685 {
 686         qeth_put_cmd(iob);
 687 }
 688
 689 static void qeth_cancel_cmd(struct qeth_cmd_buffer *iob, int rc)
 690 {
 691         qeth_notify_cmd(iob, rc);
 692         qeth_put_cmd(iob);
 693 }
 694
 695 struct qeth_cmd_buffer *qeth_alloc_cmd(struct qeth_channel *channel,
 696                                        unsigned int length, unsigned int ccws,
 697                                        long timeout)
 698 {
 699         struct qeth_cmd_buffer *iob;
 700
 701         if (length > QETH_BUFSIZE)
 702                 return NULL;
 703
 704         iob = kzalloc(sizeof(*iob), GFP_KERNEL);
 705         if (!iob)
 706                 return NULL;
 707
 708         iob->data = kzalloc(ALIGN(length, 8) + ccws * sizeof(struct ccw1),
 709                             GFP_KERNEL | GFP_DMA);
 710         if (!iob->data) {
 711                 kfree(iob);
 712                 return NULL;
 713         }
 714
 715         init_completion(&iob->done);
 716         spin_lock_init(&iob->lock);
 717         INIT_LIST_HEAD(&iob->list);
 718         refcount_set(&iob->ref_count, 1);
 719         iob->channel = channel;
 720         iob->timeout = timeout;
 721         iob->length = length;
 722         return iob;
 723 }
 724 EXPORT_SYMBOL_GPL(qeth_alloc_cmd);
 725
 726 static void qeth_issue_next_read_cb(struct qeth_card *card,
 727                                     struct qeth_cmd_buffer *iob,
 728                                     unsigned int data_length)
 729 {
 730         struct qeth_cmd_buffer *request = NULL;
 731         struct qeth_ipa_cmd *cmd = NULL;
 732         struct qeth_reply *reply = NULL;
 733         struct qeth_cmd_buffer *tmp;
 734         unsigned long flags;
 735         int rc = 0;
 736
 737         QETH_CARD_TEXT(card, 4, "sndctlcb");
 738         rc = qeth_check_idx_response(card, iob->data);
 739         switch (rc) {
 740         case 0:
 741                 break;
 742         case -EIO:
 743                 qeth_clear_ipacmd_list(card);
 744                 qeth_schedule_recovery(card);
 745                 /* fall through */
 746         default:
 747                 goto out;
 748         }
 749
 750         if (IS_IPA(iob->data)) {
 751                 cmd = (struct qeth_ipa_cmd *) PDU_ENCAPSULATION(iob->data);
 752                 cmd = qeth_check_ipa_data(card, cmd);
 753                 if (!cmd)
 754                         goto out;
 755                 if (IS_OSN(card) && card->osn_info.assist_cb &&
 756                     cmd->hdr.command != IPA_CMD_STARTLAN) {
 757                         card->osn_info.assist_cb(card->dev, cmd);
 758                         goto out;
 759                 }
 760         } else {
 761                 /* non-IPA commands should only flow during initialization */
 762                 if (card->state != CARD_STATE_DOWN)
 763                         goto out;
 764         }
 765
 766         /* match against pending cmd requests */
 767         spin_lock_irqsave(&card->lock, flags);
 768         list_for_each_entry(tmp, &card->cmd_waiter_list, list) {
 769                 if (!IS_IPA(tmp->data) ||
 770                     __ipa_cmd(tmp)->hdr.seqno == cmd->hdr.seqno) {
 771                         request = tmp;
 772                         /* take the object outside the lock */
 773                         qeth_get_cmd(request);
 774                         break;
 775                 }
 776         }
 777         spin_unlock_irqrestore(&card->lock, flags);
 778
 779         if (!request)
 780                 goto out;
 781
 782         reply = &request->reply;
 783         if (!reply->callback) {
 784                 rc = 0;
 785                 goto no_callback;
 786         }
 787
 788         spin_lock_irqsave(&request->lock, flags);
 789         if (request->rc)
 790                 /* Bail out when the requestor has already left: */
 791                 rc = request->rc;
 792         else
 793                 rc = reply->callback(card, reply, cmd ? (unsigned long)cmd :
 794                                                         (unsigned long)iob);
 795         spin_unlock_irqrestore(&request->lock, flags);
 796
 797 no_callback:
 798         if (rc <= 0)
 799                 qeth_notify_cmd(request, rc);
 800         qeth_put_cmd(request);
 801 out:
 802         memcpy(&card->seqno.pdu_hdr_ack,
 803                 QETH_PDU_HEADER_SEQ_NO(iob->data),
 804                 QETH_SEQ_NO_LENGTH);
 805         qeth_put_cmd(iob);
 806         __qeth_issue_next_read(card);
 807 }
 808
 809 static int qeth_set_thread_start_bit(struct qeth_card *card,
 810                 unsigned long thread)
 811 {
 812         unsigned long flags;
 813
 814         spin_lock_irqsave(&card->thread_mask_lock, flags);
 815         if (!(card->thread_allowed_mask & thread) ||
 816               (card->thread_start_mask & thread)) {
 817                 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 818                 return -EPERM;
 819         }
 820         card->thread_start_mask |= thread;
 821         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 822         return 0;
 823 }
 824
 825 void qeth_clear_thread_start_bit(struct qeth_card *card, unsigned long thread)
 826 {
 827         unsigned long flags;
 828
 829         spin_lock_irqsave(&card->thread_mask_lock, flags);
 830         card->thread_start_mask &= ~thread;
 831         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 832         wake_up(&card->wait_q);
 833 }
 834 EXPORT_SYMBOL_GPL(qeth_clear_thread_start_bit);
 835
 836 void qeth_clear_thread_running_bit(struct qeth_card *card, unsigned long thread)
 837 {
 838         unsigned long flags;
 839
 840         spin_lock_irqsave(&card->thread_mask_lock, flags);
 841         card->thread_running_mask &= ~thread;
 842         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 843         wake_up_all(&card->wait_q);
 844 }
 845 EXPORT_SYMBOL_GPL(qeth_clear_thread_running_bit);
 846
 847 static int __qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
 848 {
 849         unsigned long flags;
 850         int rc = 0;
 851
 852         spin_lock_irqsave(&card->thread_mask_lock, flags);
 853         if (card->thread_start_mask & thread) {
 854                 if ((card->thread_allowed_mask & thread) &&
 855                     !(card->thread_running_mask & thread)) {
 856                         rc = 1;
 857                         card->thread_start_mask &= ~thread;
 858                         card->thread_running_mask |= thread;
 859                 } else
 860                         rc = -EPERM;
 861         }
 862         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 863         return rc;
 864 }
 865
 866 int qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
 867 {
 868         int rc = 0;
 869
 870         wait_event(card->wait_q,
 871                    (rc = __qeth_do_run_thread(card, thread)) >= 0);
 872         return rc;
 873 }
 874 EXPORT_SYMBOL_GPL(qeth_do_run_thread);
 875
 876 void qeth_schedule_recovery(struct qeth_card *card)
 877 {
 878         QETH_CARD_TEXT(card, 2, "startrec");
 879         if (qeth_set_thread_start_bit(card, QETH_RECOVER_THREAD) == 0)
 880                 schedule_work(&card->kernel_thread_starter);
 881 }
 882 EXPORT_SYMBOL_GPL(qeth_schedule_recovery);
 883
 884 static int qeth_get_problem(struct qeth_card *card, struct ccw_device *cdev,
 885                             struct irb *irb)
 886 {
 887         int dstat, cstat;
 888         char *sense;
 889
 890         sense = (char *) irb->ecw;
 891         cstat = irb->scsw.cmd.cstat;
 892         dstat = irb->scsw.cmd.dstat;
 893
 894         if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK |
 895                      SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK |
 896                      SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) {
 897                 QETH_CARD_TEXT(card, 2, "CGENCHK");
 898                 dev_warn(&cdev->dev, "The qeth device driver "
 899                         "failed to recover an error on the device\n");
 900                 QETH_DBF_MESSAGE(2, "check on channel %x with dstat=%#x, cstat=%#x\n",
 901                                  CCW_DEVID(cdev), dstat, cstat);
 902                 print_hex_dump(KERN_WARNING, "qeth: irb ", DUMP_PREFIX_OFFSET,
 903                                 16, 1, irb, 64, 1);
 904                 return 1;
 905         }
 906
 907         if (dstat & DEV_STAT_UNIT_CHECK) {
 908                 if (sense[SENSE_RESETTING_EVENT_BYTE] &
 909                     SENSE_RESETTING_EVENT_FLAG) {
 910                         QETH_CARD_TEXT(card, 2, "REVIND");
 911                         return 1;
 912                 }
 913                 if (sense[SENSE_COMMAND_REJECT_BYTE] &
 914                     SENSE_COMMAND_REJECT_FLAG) {
 915                         QETH_CARD_TEXT(card, 2, "CMDREJi");
 916                         return 1;
 917                 }
 918                 if ((sense[2] == 0xaf) && (sense[3] == 0xfe)) {
 919                         QETH_CARD_TEXT(card, 2, "AFFE");
 920                         return 1;
 921                 }
 922                 if ((!sense[0]) && (!sense[1]) && (!sense[2]) && (!sense[3])) {
 923                         QETH_CARD_TEXT(card, 2, "ZEROSEN");
 924                         return 0;
 925                 }
 926                 QETH_CARD_TEXT(card, 2, "DGENCHK");
 927                         return 1;
 928         }
 929         return 0;
 930 }
 931
 932 static int qeth_check_irb_error(struct qeth_card *card, struct ccw_device *cdev,
 933                                 struct irb *irb)
 934 {
 935         if (!IS_ERR(irb))
 936                 return 0;
 937
 938         switch (PTR_ERR(irb)) {
 939         case -EIO:
 940                 QETH_DBF_MESSAGE(2, "i/o-error on channel %x\n",
 941                                  CCW_DEVID(cdev));
 942                 QETH_CARD_TEXT(card, 2, "ckirberr");
 943                 QETH_CARD_TEXT_(card, 2, "  rc%d", -EIO);
 944                 return -EIO;
 945         case -ETIMEDOUT:
 946                 dev_warn(&cdev->dev, "A hardware operation timed out"
 947                         " on the device\n");
 948                 QETH_CARD_TEXT(card, 2, "ckirberr");
 949                 QETH_CARD_TEXT_(card, 2, "  rc%d", -ETIMEDOUT);
 950                 return -ETIMEDOUT;
 951         default:
 952                 QETH_DBF_MESSAGE(2, "unknown error %ld on channel %x\n",
 953                                  PTR_ERR(irb), CCW_DEVID(cdev));
 954                 QETH_CARD_TEXT(card, 2, "ckirberr");
 955                 QETH_CARD_TEXT(card, 2, "  rc???");
 956                 return PTR_ERR(irb);
 957         }
 958 }
 959
 960 static void qeth_irq(struct ccw_device *cdev, unsigned long intparm,
 961                 struct irb *irb)
 962 {
 963         int rc;
 964         int cstat, dstat;
 965         struct qeth_cmd_buffer *iob = NULL;
 966         struct ccwgroup_device *gdev;
 967         struct qeth_channel *channel;
 968         struct qeth_card *card;
 969
 970         /* while we hold the ccwdev lock, this stays valid: */
 971         gdev = dev_get_drvdata(&cdev->dev);
 972         card = dev_get_drvdata(&gdev->dev);
 973         if (!card)
 974                 return;
 975
 976         QETH_CARD_TEXT(card, 5, "irq");
 977
 978         if (card->read.ccwdev == cdev) {
 979                 channel = &card->read;
 980                 QETH_CARD_TEXT(card, 5, "read");
 981         } else if (card->write.ccwdev == cdev) {
 982                 channel = &card->write;
 983                 QETH_CARD_TEXT(card, 5, "write");
 984         } else {
 985                 channel = &card->data;
 986                 QETH_CARD_TEXT(card, 5, "data");
 987         }
 988
 989         if (qeth_intparm_is_iob(intparm))
 990                 iob = (struct qeth_cmd_buffer *) __va((addr_t)intparm);
 991
 992         rc = qeth_check_irb_error(card, cdev, irb);
 993         if (rc) {
 994                 /* IO was terminated, free its resources. */
 995                 if (iob)
 996                         qeth_cancel_cmd(iob, rc);
 997                 atomic_set(&channel->irq_pending, 0);
 998                 wake_up(&card->wait_q);
 999                 return;
1000         }
1001
1002         atomic_set(&channel->irq_pending, 0);
1003
1004         if (irb->scsw.cmd.fctl & (SCSW_FCTL_CLEAR_FUNC))
1005                 channel->state = CH_STATE_STOPPED;
1006
1007         if (irb->scsw.cmd.fctl & (SCSW_FCTL_HALT_FUNC))
1008                 channel->state = CH_STATE_HALTED;
1009
1010         if (intparm == QETH_CLEAR_CHANNEL_PARM) {
1011                 QETH_CARD_TEXT(card, 6, "clrchpar");
1012                 /* we don't have to handle this further */
1013                 intparm = 0;
1014         }
1015         if (intparm == QETH_HALT_CHANNEL_PARM) {
1016                 QETH_CARD_TEXT(card, 6, "hltchpar");
1017                 /* we don't have to handle this further */
1018                 intparm = 0;
1019         }
1020
1021         cstat = irb->scsw.cmd.cstat;
1022         dstat = irb->scsw.cmd.dstat;
1023
1024         if ((dstat & DEV_STAT_UNIT_EXCEP) ||
1025             (dstat & DEV_STAT_UNIT_CHECK) ||
1026             (cstat)) {
1027                 if (irb->esw.esw0.erw.cons) {
1028                         dev_warn(&channel->ccwdev->dev,
1029                                 "The qeth device driver failed to recover "
1030                                 "an error on the device\n");
1031                         QETH_DBF_MESSAGE(2, "sense data available on channel %x: cstat %#X dstat %#X\n",
1032                                          CCW_DEVID(channel->ccwdev), cstat,
1033                                          dstat);
1034                         print_hex_dump(KERN_WARNING, "qeth: irb ",
1035                                 DUMP_PREFIX_OFFSET, 16, 1, irb, 32, 1);
1036                         print_hex_dump(KERN_WARNING, "qeth: sense data ",
1037                                 DUMP_PREFIX_OFFSET, 16, 1, irb->ecw, 32, 1);
1038                 }
1039
1040                 rc = qeth_get_problem(card, cdev, irb);
1041                 if (rc) {
1042                         card->read_or_write_problem = 1;
1043                         if (iob)
1044                                 qeth_cancel_cmd(iob, rc);
1045                         qeth_clear_ipacmd_list(card);
1046                         qeth_schedule_recovery(card);
1047                         goto out;
1048                 }
1049         }
1050
1051         if (iob) {
1052                 /* sanity check: */
1053                 if (irb->scsw.cmd.count > iob->length) {
1054                         qeth_cancel_cmd(iob, -EIO);
1055                         goto out;
1056                 }
1057                 if (iob->callback)
1058                         iob->callback(card, iob,
1059                                       iob->length - irb->scsw.cmd.count);
1060         }
1061
1062 out:
1063         wake_up(&card->wait_q);
1064         return;
1065 }
1066
1067 static void qeth_notify_skbs(struct qeth_qdio_out_q *q,
1068                 struct qeth_qdio_out_buffer *buf,
1069                 enum iucv_tx_notify notification)
1070 {
1071         struct sk_buff *skb;
1072
1073         skb_queue_walk(&buf->skb_list, skb) {
1074                 QETH_CARD_TEXT_(q->card, 5, "skbn%d", notification);
1075                 QETH_CARD_TEXT_(q->card, 5, "%lx", (long) skb);
1076                 if (skb->protocol == htons(ETH_P_AF_IUCV) && skb->sk)
1077                         iucv_sk(skb->sk)->sk_txnotify(skb, notification);
1078         }
1079 }
1080
1081 static void qeth_tx_complete_buf(struct qeth_qdio_out_buffer *buf, bool error,
1082                                  int budget)
1083 {
1084         struct qeth_qdio_out_q *queue = buf->q;
1085         struct sk_buff *skb;
1086
1087         /* release may never happen from within CQ tasklet scope */
1088         WARN_ON_ONCE(atomic_read(&buf->state) == QETH_QDIO_BUF_IN_CQ);
1089
1090         if (atomic_read(&buf->state) == QETH_QDIO_BUF_PENDING)
1091                 qeth_notify_skbs(queue, buf, TX_NOTIFY_GENERALERROR);
1092
1093         /* Empty buffer? */
1094         if (buf->next_element_to_fill == 0)
1095                 return;
1096
1097         QETH_TXQ_STAT_INC(queue, bufs);
1098         QETH_TXQ_STAT_ADD(queue, buf_elements, buf->next_element_to_fill);
1099         while ((skb = __skb_dequeue(&buf->skb_list)) != NULL) {
1100                 unsigned int bytes = qdisc_pkt_len(skb);
1101                 bool is_tso = skb_is_gso(skb);
1102                 unsigned int packets;
1103
1104                 packets = is_tso ? skb_shinfo(skb)->gso_segs : 1;
1105                 if (error) {
1106                         QETH_TXQ_STAT_ADD(queue, tx_errors, packets);
1107                 } else {
1108                         QETH_TXQ_STAT_ADD(queue, tx_packets, packets);
1109                         QETH_TXQ_STAT_ADD(queue, tx_bytes, bytes);
1110                         if (skb->ip_summed == CHECKSUM_PARTIAL)
1111                                 QETH_TXQ_STAT_ADD(queue, skbs_csum, packets);
1112                         if (skb_is_nonlinear(skb))
1113                                 QETH_TXQ_STAT_INC(queue, skbs_sg);
1114                         if (is_tso) {
1115                                 QETH_TXQ_STAT_INC(queue, skbs_tso);
1116                                 QETH_TXQ_STAT_ADD(queue, tso_bytes, bytes);
1117                         }
1118                 }
1119
1120                 napi_consume_skb(skb, budget);
1121         }
1122 }
1123
1124 static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
1125                                      struct qeth_qdio_out_buffer *buf,
1126                                      bool error, int budget)
1127 {
1128         int i;
1129
1130         /* is PCI flag set on buffer? */
1131         if (buf->buffer->element[0].sflags & SBAL_SFLAGS0_PCI_REQ)
1132                 atomic_dec(&queue->set_pci_flags_count);
1133
1134         qeth_tx_complete_buf(buf, error, budget);
1135
1136         for (i = 0; i < queue->max_elements; ++i) {
1137                 if (buf->buffer->element[i].addr && buf->is_header[i])
1138                         kmem_cache_free(qeth_core_header_cache,
1139                                 buf->buffer->element[i].addr);
1140                 buf->is_header[i] = 0;
1141         }
1142
1143         qeth_scrub_qdio_buffer(buf->buffer, queue->max_elements);
1144         buf->next_element_to_fill = 0;
1145         buf->bytes = 0;
1146         atomic_set(&buf->state, QETH_QDIO_BUF_EMPTY);
1147 }
1148
1149 static void qeth_drain_output_queue(struct qeth_qdio_out_q *q, bool free)
1150 {
1151         int j;
1152
1153         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
1154                 if (!q->bufs[j])
1155                         continue;
1156                 qeth_cleanup_handled_pending(q, j, 1);
1157                 qeth_clear_output_buffer(q, q->bufs[j], true, 0);
1158                 if (free) {
1159                         kmem_cache_free(qeth_qdio_outbuf_cache, q->bufs[j]);
1160                         q->bufs[j] = NULL;
1161                 }
1162         }
1163 }
1164
1165 void qeth_drain_output_queues(struct qeth_card *card)
1166 {
1167         int i;
1168
1169         QETH_CARD_TEXT(card, 2, "clearqdbf");
1170         /* clear outbound buffers to free skbs */
1171         for (i = 0; i < card->qdio.no_out_queues; ++i) {
1172                 if (card->qdio.out_qs[i])
1173                         qeth_drain_output_queue(card->qdio.out_qs[i], false);
1174         }
1175 }
1176 EXPORT_SYMBOL_GPL(qeth_drain_output_queues);
1177
1178 static void qeth_free_buffer_pool(struct qeth_card *card)
1179 {
1180         struct qeth_buffer_pool_entry *pool_entry, *tmp;
1181         int i = 0;
1182         list_for_each_entry_safe(pool_entry, tmp,
1183                                  &card->qdio.init_pool.entry_list, init_list){
1184                 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i)
1185                         free_page((unsigned long)pool_entry->elements[i]);
1186                 list_del(&pool_entry->init_list);
1187                 kfree(pool_entry);
1188         }
1189 }
1190
1191 static void qeth_clean_channel(struct qeth_channel *channel)
1192 {
1193         struct ccw_device *cdev = channel->ccwdev;
1194
1195         QETH_DBF_TEXT(SETUP, 2, "freech");
1196
1197         spin_lock_irq(get_ccwdev_lock(cdev));
1198         cdev->handler = NULL;
1199         spin_unlock_irq(get_ccwdev_lock(cdev));
1200 }
1201
1202 static void qeth_setup_channel(struct qeth_channel *channel)
1203 {
1204         struct ccw_device *cdev = channel->ccwdev;
1205
1206         QETH_DBF_TEXT(SETUP, 2, "setupch");
1207
1208         channel->state = CH_STATE_DOWN;
1209         atomic_set(&channel->irq_pending, 0);
1210
1211         spin_lock_irq(get_ccwdev_lock(cdev));
1212         cdev->handler = qeth_irq;
1213         spin_unlock_irq(get_ccwdev_lock(cdev));
1214 }
1215
1216 static int qeth_osa_set_output_queues(struct qeth_card *card, bool single)
1217 {
1218         unsigned int count = single ? 1 : card->dev->num_tx_queues;
1219         int rc;
1220
1221         rtnl_lock();
1222         rc = netif_set_real_num_tx_queues(card->dev, count);
1223         rtnl_unlock();
1224
1225         if (rc)
1226                 return rc;
1227
1228         if (card->qdio.no_out_queues == count)
1229                 return 0;
1230
1231         if (atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED)
1232                 qeth_free_qdio_queues(card);
1233
1234         if (count == 1)
1235                 dev_info(&card->gdev->dev, "Priority Queueing not supported\n");
1236
1237         card->qdio.default_out_queue = single ? 0 : QETH_DEFAULT_QUEUE;
1238         card->qdio.no_out_queues = count;
1239         return 0;
1240 }
1241
1242 static int qeth_update_from_chp_desc(struct qeth_card *card)
1243 {
1244         struct ccw_device *ccwdev;
1245         struct channel_path_desc_fmt0 *chp_dsc;
1246         int rc = 0;
1247
1248         QETH_CARD_TEXT(card, 2, "chp_desc");
1249
1250         ccwdev = card->data.ccwdev;
1251         chp_dsc = ccw_device_get_chp_desc(ccwdev, 0);
1252         if (!chp_dsc)
1253                 return -ENOMEM;
1254
1255         card->info.func_level = 0x4100 + chp_dsc->desc;
1256
1257         if (IS_OSD(card) || IS_OSX(card))
1258                 /* CHPP field bit 6 == 1 -> single queue */
1259                 rc = qeth_osa_set_output_queues(card, chp_dsc->chpp & 0x02);
1260
1261         kfree(chp_dsc);
1262         QETH_CARD_TEXT_(card, 2, "nr:%x", card->qdio.no_out_queues);
1263         QETH_CARD_TEXT_(card, 2, "lvl:%02x", card->info.func_level);
1264         return rc;
1265 }
1266
1267 static void qeth_init_qdio_info(struct qeth_card *card)
1268 {
1269         QETH_CARD_TEXT(card, 4, "intqdinf");
1270         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
1271         card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT;
1272         card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
1273
1274         /* inbound */
1275         card->qdio.no_in_queues = 1;
1276         card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
1277         if (IS_IQD(card))
1278                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_HSDEFAULT;
1279         else
1280                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_DEFAULT;
1281         card->qdio.in_buf_pool.buf_count = card->qdio.init_pool.buf_count;
1282         INIT_LIST_HEAD(&card->qdio.in_buf_pool.entry_list);
1283         INIT_LIST_HEAD(&card->qdio.init_pool.entry_list);
1284 }
1285
1286 static void qeth_set_initial_options(struct qeth_card *card)
1287 {
1288         card->options.route4.type = NO_ROUTER;
1289         card->options.route6.type = NO_ROUTER;
1290         card->options.rx_sg_cb = QETH_RX_SG_CB;
1291         card->options.isolation = ISOLATION_MODE_NONE;
1292         card->options.cq = QETH_CQ_DISABLED;
1293         card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
1294 }
1295
1296 static int qeth_do_start_thread(struct qeth_card *card, unsigned long thread)
1297 {
1298         unsigned long flags;
1299         int rc = 0;
1300
1301         spin_lock_irqsave(&card->thread_mask_lock, flags);
1302         QETH_CARD_TEXT_(card, 4, "  %02x%02x%02x",
1303                         (u8) card->thread_start_mask,
1304                         (u8) card->thread_allowed_mask,
1305                         (u8) card->thread_running_mask);
1306         rc = (card->thread_start_mask & thread);
1307         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1308         return rc;
1309 }
1310
1311 static void qeth_start_kernel_thread(struct work_struct *work)
1312 {
1313         struct task_struct *ts;
1314         struct qeth_card *card = container_of(work, struct qeth_card,
1315                                         kernel_thread_starter);
1316         QETH_CARD_TEXT(card , 2, "strthrd");
1317
1318         if (card->read.state != CH_STATE_UP &&
1319             card->write.state != CH_STATE_UP)
1320                 return;
1321         if (qeth_do_start_thread(card, QETH_RECOVER_THREAD)) {
1322                 ts = kthread_run(card->discipline->recover, (void *)card,
1323                                 "qeth_recover");
1324                 if (IS_ERR(ts)) {
1325                         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1326                         qeth_clear_thread_running_bit(card,
1327                                 QETH_RECOVER_THREAD);
1328                 }
1329         }
1330 }
1331
1332 static void qeth_buffer_reclaim_work(struct work_struct *);
1333 static void qeth_setup_card(struct qeth_card *card)
1334 {
1335         QETH_CARD_TEXT(card, 2, "setupcrd");
1336
1337         card->info.type = CARD_RDEV(card)->id.driver_info;
1338         card->state = CARD_STATE_DOWN;
1339         spin_lock_init(&card->lock);
1340         spin_lock_init(&card->thread_mask_lock);
1341         mutex_init(&card->conf_mutex);
1342         mutex_init(&card->discipline_mutex);
1343         INIT_WORK(&card->kernel_thread_starter, qeth_start_kernel_thread);
1344         INIT_LIST_HEAD(&card->cmd_waiter_list);
1345         init_waitqueue_head(&card->wait_q);
1346         qeth_set_initial_options(card);
1347         /* IP address takeover */
1348         INIT_LIST_HEAD(&card->ipato.entries);
1349         qeth_init_qdio_info(card);
1350         INIT_DELAYED_WORK(&card->buffer_reclaim_work, qeth_buffer_reclaim_work);
1351         INIT_WORK(&card->close_dev_work, qeth_close_dev_handler);
1352 }
1353
1354 static void qeth_core_sl_print(struct seq_file *m, struct service_level *slr)
1355 {
1356         struct qeth_card *card = container_of(slr, struct qeth_card,
1357                                         qeth_service_level);
1358         if (card->info.mcl_level[0])
1359                 seq_printf(m, "qeth: %s firmware level %s\n",
1360                         CARD_BUS_ID(card), card->info.mcl_level);
1361 }
1362
1363 static struct qeth_card *qeth_alloc_card(struct ccwgroup_device *gdev)
1364 {
1365         struct qeth_card *card;
1366
1367         QETH_DBF_TEXT(SETUP, 2, "alloccrd");
1368         card = kzalloc(sizeof(*card), GFP_KERNEL);
1369         if (!card)
1370                 goto out;
1371         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1372
1373         card->gdev = gdev;
1374         dev_set_drvdata(&gdev->dev, card);
1375         CARD_RDEV(card) = gdev->cdev[0];
1376         CARD_WDEV(card) = gdev->cdev[1];
1377         CARD_DDEV(card) = gdev->cdev[2];
1378
1379         card->event_wq = alloc_ordered_workqueue("%s_event", 0,
1380                                                  dev_name(&gdev->dev));
1381         if (!card->event_wq)
1382                 goto out_wq;
1383
1384         card->read_cmd = qeth_alloc_cmd(&card->read, QETH_BUFSIZE, 1, 0);
1385         if (!card->read_cmd)
1386                 goto out_read_cmd;
1387
1388         qeth_setup_channel(&card->read);
1389         qeth_setup_channel(&card->write);
1390         qeth_setup_channel(&card->data);
1391         card->qeth_service_level.seq_print = qeth_core_sl_print;
1392         register_service_level(&card->qeth_service_level);
1393         return card;
1394
1395 out_read_cmd:
1396         destroy_workqueue(card->event_wq);
1397 out_wq:
1398         dev_set_drvdata(&gdev->dev, NULL);
1399         kfree(card);
1400 out:
1401         return NULL;
1402 }
1403
1404 static int qeth_clear_channel(struct qeth_card *card,
1405                               struct qeth_channel *channel)
1406 {
1407         int rc;
1408
1409         QETH_CARD_TEXT(card, 3, "clearch");
1410         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1411         rc = ccw_device_clear(channel->ccwdev, QETH_CLEAR_CHANNEL_PARM);
1412         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1413
1414         if (rc)
1415                 return rc;
1416         rc = wait_event_interruptible_timeout(card->wait_q,
1417                         channel->state == CH_STATE_STOPPED, QETH_TIMEOUT);
1418         if (rc == -ERESTARTSYS)
1419                 return rc;
1420         if (channel->state != CH_STATE_STOPPED)
1421                 return -ETIME;
1422         channel->state = CH_STATE_DOWN;
1423         return 0;
1424 }
1425
1426 static int qeth_halt_channel(struct qeth_card *card,
1427                              struct qeth_channel *channel)
1428 {
1429         int rc;
1430
1431         QETH_CARD_TEXT(card, 3, "haltch");
1432         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1433         rc = ccw_device_halt(channel->ccwdev, QETH_HALT_CHANNEL_PARM);
1434         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1435
1436         if (rc)
1437                 return rc;
1438         rc = wait_event_interruptible_timeout(card->wait_q,
1439                         channel->state == CH_STATE_HALTED, QETH_TIMEOUT);
1440         if (rc == -ERESTARTSYS)
1441                 return rc;
1442         if (channel->state != CH_STATE_HALTED)
1443                 return -ETIME;
1444         return 0;
1445 }
1446
1447 static int qeth_halt_channels(struct qeth_card *card)
1448 {
1449         int rc1 = 0, rc2 = 0, rc3 = 0;
1450
1451         QETH_CARD_TEXT(card, 3, "haltchs");
1452         rc1 = qeth_halt_channel(card, &card->read);
1453         rc2 = qeth_halt_channel(card, &card->write);
1454         rc3 = qeth_halt_channel(card, &card->data);
1455         if (rc1)
1456                 return rc1;
1457         if (rc2)
1458                 return rc2;
1459         return rc3;
1460 }
1461
1462 static int qeth_clear_channels(struct qeth_card *card)
1463 {
1464         int rc1 = 0, rc2 = 0, rc3 = 0;
1465
1466         QETH_CARD_TEXT(card, 3, "clearchs");
1467         rc1 = qeth_clear_channel(card, &card->read);
1468         rc2 = qeth_clear_channel(card, &card->write);
1469         rc3 = qeth_clear_channel(card, &card->data);
1470         if (rc1)
1471                 return rc1;
1472         if (rc2)
1473                 return rc2;
1474         return rc3;
1475 }
1476
1477 static int qeth_clear_halt_card(struct qeth_card *card, int halt)
1478 {
1479         int rc = 0;
1480
1481         QETH_CARD_TEXT(card, 3, "clhacrd");
1482
1483         if (halt)
1484                 rc = qeth_halt_channels(card);
1485         if (rc)
1486                 return rc;
1487         return qeth_clear_channels(card);
1488 }
1489
1490 int qeth_qdio_clear_card(struct qeth_card *card, int use_halt)
1491 {
1492         int rc = 0;
1493
1494         QETH_CARD_TEXT(card, 3, "qdioclr");
1495         switch (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ESTABLISHED,
1496                 QETH_QDIO_CLEANING)) {
1497         case QETH_QDIO_ESTABLISHED:
1498                 if (IS_IQD(card))
1499                         rc = qdio_shutdown(CARD_DDEV(card),
1500                                 QDIO_FLAG_CLEANUP_USING_HALT);
1501                 else
1502                         rc = qdio_shutdown(CARD_DDEV(card),
1503                                 QDIO_FLAG_CLEANUP_USING_CLEAR);
1504                 if (rc)
1505                         QETH_CARD_TEXT_(card, 3, "1err%d", rc);
1506                 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
1507                 break;
1508         case QETH_QDIO_CLEANING:
1509                 return rc;
1510         default:
1511                 break;
1512         }
1513         rc = qeth_clear_halt_card(card, use_halt);
1514         if (rc)
1515                 QETH_CARD_TEXT_(card, 3, "2err%d", rc);
1516         card->state = CARD_STATE_DOWN;
1517         return rc;
1518 }
1519 EXPORT_SYMBOL_GPL(qeth_qdio_clear_card);
1520
1521 static enum qeth_discipline_id qeth_vm_detect_layer(struct qeth_card *card)
1522 {
1523         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1524         struct diag26c_vnic_resp *response = NULL;
1525         struct diag26c_vnic_req *request = NULL;
1526         struct ccw_dev_id id;
1527         char userid[80];
1528         int rc = 0;
1529
1530         QETH_CARD_TEXT(card, 2, "vmlayer");
1531
1532         cpcmd("QUERY USERID", userid, sizeof(userid), &rc);
1533         if (rc)
1534                 goto out;
1535
1536         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
1537         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
1538         if (!request || !response) {
1539                 rc = -ENOMEM;
1540                 goto out;
1541         }
1542
1543         ccw_device_get_id(CARD_RDEV(card), &id);
1544         request->resp_buf_len = sizeof(*response);
1545         request->resp_version = DIAG26C_VERSION6_VM65918;
1546         request->req_format = DIAG26C_VNIC_INFO;
1547         ASCEBC(userid, 8);
1548         memcpy(&request->sys_name, userid, 8);
1549         request->devno = id.devno;
1550
1551         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1552         rc = diag26c(request, response, DIAG26C_PORT_VNIC);
1553         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1554         if (rc)
1555                 goto out;
1556         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
1557
1558         if (request->resp_buf_len < sizeof(*response) ||
1559             response->version != request->resp_version) {
1560                 rc = -EIO;
1561                 goto out;
1562         }
1563
1564         if (response->protocol == VNIC_INFO_PROT_L2)
1565                 disc = QETH_DISCIPLINE_LAYER2;
1566         else if (response->protocol == VNIC_INFO_PROT_L3)
1567                 disc = QETH_DISCIPLINE_LAYER3;
1568
1569 out:
1570         kfree(response);
1571         kfree(request);
1572         if (rc)
1573                 QETH_CARD_TEXT_(card, 2, "err%x", rc);
1574         return disc;
1575 }
1576
1577 /* Determine whether the device requires a specific layer discipline */
1578 static enum qeth_discipline_id qeth_enforce_discipline(struct qeth_card *card)
1579 {
1580         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1581
1582         if (IS_OSM(card) || IS_OSN(card))
1583                 disc = QETH_DISCIPLINE_LAYER2;
1584         else if (IS_VM_NIC(card))
1585                 disc = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
1586                                       qeth_vm_detect_layer(card);
1587
1588         switch (disc) {
1589         case QETH_DISCIPLINE_LAYER2:
1590                 QETH_CARD_TEXT(card, 3, "force l2");
1591                 break;
1592         case QETH_DISCIPLINE_LAYER3:
1593                 QETH_CARD_TEXT(card, 3, "force l3");
1594                 break;
1595         default:
1596                 QETH_CARD_TEXT(card, 3, "force no");
1597         }
1598
1599         return disc;
1600 }
1601
1602 static void qeth_set_blkt_defaults(struct qeth_card *card)
1603 {
1604         QETH_CARD_TEXT(card, 2, "cfgblkt");
1605
1606         if (card->info.use_v1_blkt) {
1607                 card->info.blkt.time_total = 0;
1608                 card->info.blkt.inter_packet = 0;
1609                 card->info.blkt.inter_packet_jumbo = 0;
1610         } else {
1611                 card->info.blkt.time_total = 250;
1612                 card->info.blkt.inter_packet = 5;
1613                 card->info.blkt.inter_packet_jumbo = 15;
1614         }
1615 }
1616
1617 static void qeth_init_tokens(struct qeth_card *card)
1618 {
1619         card->token.issuer_rm_w = 0x00010103UL;
1620         card->token.cm_filter_w = 0x00010108UL;
1621         card->token.cm_connection_w = 0x0001010aUL;
1622         card->token.ulp_filter_w = 0x0001010bUL;
1623         card->token.ulp_connection_w = 0x0001010dUL;
1624 }
1625
1626 static void qeth_init_func_level(struct qeth_card *card)
1627 {
1628         switch (card->info.type) {
1629         case QETH_CARD_TYPE_IQD:
1630                 card->info.func_level = QETH_IDX_FUNC_LEVEL_IQD;
1631                 break;
1632         case QETH_CARD_TYPE_OSD:
1633         case QETH_CARD_TYPE_OSN:
1634                 card->info.func_level = QETH_IDX_FUNC_LEVEL_OSD;
1635                 break;
1636         default:
1637                 break;
1638         }
1639 }
1640
1641 static void qeth_idx_finalize_cmd(struct qeth_card *card,
1642                                   struct qeth_cmd_buffer *iob)
1643 {
1644         memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data), &card->seqno.trans_hdr,
1645                QETH_SEQ_NO_LENGTH);
1646         if (iob->channel == &card->write)
1647                 card->seqno.trans_hdr++;
1648 }
1649
1650 static int qeth_peer_func_level(int level)
1651 {
1652         if ((level & 0xff) == 8)
1653                 return (level & 0xff) + 0x400;
1654         if (((level >> 8) & 3) == 1)
1655                 return (level & 0xff) + 0x200;
1656         return level;
1657 }
1658
1659 static void qeth_mpc_finalize_cmd(struct qeth_card *card,
1660                                   struct qeth_cmd_buffer *iob)
1661 {
1662         qeth_idx_finalize_cmd(card, iob);
1663
1664         memcpy(QETH_PDU_HEADER_SEQ_NO(iob->data),
1665                &card->seqno.pdu_hdr, QETH_SEQ_NO_LENGTH);
1666         card->seqno.pdu_hdr++;
1667         memcpy(QETH_PDU_HEADER_ACK_SEQ_NO(iob->data),
1668                &card->seqno.pdu_hdr_ack, QETH_SEQ_NO_LENGTH);
1669
1670         iob->callback = qeth_release_buffer_cb;
1671 }
1672
1673 static struct qeth_cmd_buffer *qeth_mpc_alloc_cmd(struct qeth_card *card,
1674                                                   void *data,
1675                                                   unsigned int data_length)
1676 {
1677         struct qeth_cmd_buffer *iob;
1678
1679         iob = qeth_alloc_cmd(&card->write, data_length, 1, QETH_TIMEOUT);
1680         if (!iob)
1681                 return NULL;
1682
1683         memcpy(iob->data, data, data_length);
1684         qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, data_length,
1685                        iob->data);
1686         iob->finalize = qeth_mpc_finalize_cmd;
1687         return iob;
1688 }
1689
1690 /**
1691  * qeth_send_control_data() -   send control command to the card
1692  * @card:                       qeth_card structure pointer
1693  * @iob:                        qeth_cmd_buffer pointer
1694  * @reply_cb:                   callback function pointer
1695  * @cb_card:                    pointer to the qeth_card structure
1696  * @cb_reply:                   pointer to the qeth_reply structure
1697  * @cb_cmd:                     pointer to the original iob for non-IPA
1698  *                              commands, or to the qeth_ipa_cmd structure
1699  *                              for the IPA commands.
1700  * @reply_param:                private pointer passed to the callback
1701  *
1702  * Callback function gets called one or more times, with cb_cmd
1703  * pointing to the response returned by the hardware. Callback
1704  * function must return
1705  *   > 0 if more reply blocks are expected,
1706  *     0 if the last or only reply block is received, and
1707  *   < 0 on error.
1708  * Callback function can get the value of the reply_param pointer from the
1709  * field 'param' of the structure qeth_reply.
1710  */
1711
1712 static int qeth_send_control_data(struct qeth_card *card,
1713                                   struct qeth_cmd_buffer *iob,
1714                                   int (*reply_cb)(struct qeth_card *cb_card,
1715                                                   struct qeth_reply *cb_reply,
1716                                                   unsigned long cb_cmd),
1717                                   void *reply_param)
1718 {
1719         struct qeth_channel *channel = iob->channel;
1720         struct qeth_reply *reply = &iob->reply;
1721         long timeout = iob->timeout;
1722         int rc;
1723
1724         QETH_CARD_TEXT(card, 2, "sendctl");
1725
1726         reply->callback = reply_cb;
1727         reply->param = reply_param;
1728
1729         timeout = wait_event_interruptible_timeout(card->wait_q,
1730                                                    qeth_trylock_channel(channel),
1731                                                    timeout);
1732         if (timeout <= 0) {
1733                 qeth_put_cmd(iob);
1734                 return (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
1735         }
1736
1737         if (iob->finalize)
1738                 iob->finalize(card, iob);
1739         QETH_DBF_HEX(CTRL, 2, iob->data, min(iob->length, QETH_DBF_CTRL_LEN));
1740
1741         qeth_enqueue_cmd(card, iob);
1742
1743         /* This pairs with iob->callback, and keeps the iob alive after IO: */
1744         qeth_get_cmd(iob);
1745
1746         QETH_CARD_TEXT(card, 6, "noirqpnd");
1747         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1748         rc = ccw_device_start_timeout(channel->ccwdev, __ccw_from_cmd(iob),
1749                                       (addr_t) iob, 0, 0, timeout);
1750         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1751         if (rc) {
1752                 QETH_DBF_MESSAGE(2, "qeth_send_control_data on device %x: ccw_device_start rc = %i\n",
1753                                  CARD_DEVID(card), rc);
1754                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
1755                 qeth_dequeue_cmd(card, iob);
1756                 qeth_put_cmd(iob);
1757                 atomic_set(&channel->irq_pending, 0);
1758                 wake_up(&card->wait_q);
1759                 goto out;
1760         }
1761
1762         timeout = wait_for_completion_interruptible_timeout(&iob->done,
1763                                                             timeout);
1764         if (timeout <= 0)
1765                 rc = (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
1766
1767         qeth_dequeue_cmd(card, iob);
1768
1769         if (reply_cb) {
1770                 /* Wait until the callback for a late reply has completed: */
1771                 spin_lock_irq(&iob->lock);
1772                 if (rc)
1773                         /* Zap any callback that's still pending: */
1774                         iob->rc = rc;
1775                 spin_unlock_irq(&iob->lock);
1776         }
1777
1778         if (!rc)
1779                 rc = iob->rc;
1780
1781 out:
1782         qeth_put_cmd(iob);
1783         return rc;
1784 }
1785
1786 struct qeth_node_desc {
1787         struct node_descriptor nd1;
1788         struct node_descriptor nd2;
1789         struct node_descriptor nd3;
1790 };
1791
1792 static void qeth_read_conf_data_cb(struct qeth_card *card,
1793                                    struct qeth_cmd_buffer *iob,
1794                                    unsigned int data_length)
1795 {
1796         struct qeth_node_desc *nd = (struct qeth_node_desc *) iob->data;
1797         int rc = 0;
1798         u8 *tag;
1799
1800         QETH_CARD_TEXT(card, 2, "cfgunit");
1801
1802         if (data_length < sizeof(*nd)) {
1803                 rc = -EINVAL;
1804                 goto out;
1805         }
1806
1807         card->info.is_vm_nic = nd->nd1.plant[0] == _ascebc['V'] &&
1808                                nd->nd1.plant[1] == _ascebc['M'];
1809         tag = (u8 *)&nd->nd1.tag;
1810         card->info.chpid = tag[0];
1811         card->info.unit_addr2 = tag[1];
1812
1813         tag = (u8 *)&nd->nd2.tag;
1814         card->info.cula = tag[1];
1815
1816         card->info.use_v1_blkt = nd->nd3.model[0] == 0xF0 &&
1817                                  nd->nd3.model[1] == 0xF0 &&
1818                                  nd->nd3.model[2] >= 0xF1 &&
1819                                  nd->nd3.model[2] <= 0xF4;
1820
1821 out:
1822         qeth_notify_cmd(iob, rc);
1823         qeth_put_cmd(iob);
1824 }
1825
1826 static int qeth_read_conf_data(struct qeth_card *card)
1827 {
1828         struct qeth_channel *channel = &card->data;
1829         struct qeth_cmd_buffer *iob;
1830         struct ciw *ciw;
1831
1832         /* scan for RCD command in extended SenseID data */
1833         ciw = ccw_device_get_ciw(channel->ccwdev, CIW_TYPE_RCD);
1834         if (!ciw || ciw->cmd == 0)
1835                 return -EOPNOTSUPP;
1836         if (ciw->count < sizeof(struct qeth_node_desc))
1837                 return -EINVAL;
1838
1839         iob = qeth_alloc_cmd(channel, ciw->count, 1, QETH_RCD_TIMEOUT);
1840         if (!iob)
1841                 return -ENOMEM;
1842
1843         iob->callback = qeth_read_conf_data_cb;
1844         qeth_setup_ccw(__ccw_from_cmd(iob), ciw->cmd, 0, iob->length,
1845                        iob->data);
1846
1847         return qeth_send_control_data(card, iob, NULL, NULL);
1848 }
1849
1850 static int qeth_idx_check_activate_response(struct qeth_card *card,
1851                                             struct qeth_channel *channel,
1852                                             struct qeth_cmd_buffer *iob)
1853 {
1854         int rc;
1855
1856         rc = qeth_check_idx_response(card, iob->data);
1857         if (rc)
1858                 return rc;
1859
1860         if (QETH_IS_IDX_ACT_POS_REPLY(iob->data))
1861                 return 0;
1862
1863         /* negative reply: */
1864         QETH_CARD_TEXT_(card, 2, "idxneg%c",
1865                         QETH_IDX_ACT_CAUSE_CODE(iob->data));
1866
1867         switch (QETH_IDX_ACT_CAUSE_CODE(iob->data)) {
1868         case QETH_IDX_ACT_ERR_EXCL:
1869                 dev_err(&channel->ccwdev->dev,
1870                         "The adapter is used exclusively by another host\n");
1871                 return -EBUSY;
1872         case QETH_IDX_ACT_ERR_AUTH:
1873         case QETH_IDX_ACT_ERR_AUTH_USER:
1874                 dev_err(&channel->ccwdev->dev,
1875                         "Setting the device online failed because of insufficient authorization\n");
1876                 return -EPERM;
1877         default:
1878                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: negative reply\n",
1879                                  CCW_DEVID(channel->ccwdev));
1880                 return -EIO;
1881         }
1882 }
1883
1884 static void qeth_idx_activate_read_channel_cb(struct qeth_card *card,
1885                                               struct qeth_cmd_buffer *iob,
1886                                               unsigned int data_length)
1887 {
1888         struct qeth_channel *channel = iob->channel;
1889         u16 peer_level;
1890         int rc;
1891
1892         QETH_CARD_TEXT(card, 2, "idxrdcb");
1893
1894         rc = qeth_idx_check_activate_response(card, channel, iob);
1895         if (rc)
1896                 goto out;
1897
1898         memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
1899         if (peer_level != qeth_peer_func_level(card->info.func_level)) {
1900                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
1901                                  CCW_DEVID(channel->ccwdev),
1902                                  card->info.func_level, peer_level);
1903                 rc = -EINVAL;
1904                 goto out;
1905         }
1906
1907         memcpy(&card->token.issuer_rm_r,
1908                QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
1909                QETH_MPC_TOKEN_LENGTH);
1910         memcpy(&card->info.mcl_level[0],
1911                QETH_IDX_REPLY_LEVEL(iob->data), QETH_MCL_LENGTH);
1912
1913 out:
1914         qeth_notify_cmd(iob, rc);
1915         qeth_put_cmd(iob);
1916 }
1917
1918 static void qeth_idx_activate_write_channel_cb(struct qeth_card *card,
1919                                                struct qeth_cmd_buffer *iob,
1920                                                unsigned int data_length)
1921 {
1922         struct qeth_channel *channel = iob->channel;
1923         u16 peer_level;
1924         int rc;
1925
1926         QETH_CARD_TEXT(card, 2, "idxwrcb");
1927
1928         rc = qeth_idx_check_activate_response(card, channel, iob);
1929         if (rc)
1930                 goto out;
1931
1932         memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
1933         if ((peer_level & ~0x0100) !=
1934             qeth_peer_func_level(card->info.func_level)) {
1935                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
1936                                  CCW_DEVID(channel->ccwdev),
1937                                  card->info.func_level, peer_level);
1938                 rc = -EINVAL;
1939         }
1940
1941 out:
1942         qeth_notify_cmd(iob, rc);
1943         qeth_put_cmd(iob);
1944 }
1945
1946 static void qeth_idx_setup_activate_cmd(struct qeth_card *card,
1947                                         struct qeth_cmd_buffer *iob)
1948 {
1949         u16 addr = (card->info.cula << 8) + card->info.unit_addr2;
1950         u8 port = ((u8)card->dev->dev_port) | 0x80;
1951         struct ccw1 *ccw = __ccw_from_cmd(iob);
1952         struct ccw_dev_id dev_id;
1953
1954         qeth_setup_ccw(&ccw[0], CCW_CMD_WRITE, CCW_FLAG_CC, IDX_ACTIVATE_SIZE,
1955                        iob->data);
1956         qeth_setup_ccw(&ccw[1], CCW_CMD_READ, 0, iob->length, iob->data);
1957         ccw_device_get_id(CARD_DDEV(card), &dev_id);
1958         iob->finalize = qeth_idx_finalize_cmd;
1959
1960         memcpy(QETH_IDX_ACT_PNO(iob->data), &port, 1);
1961         memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
1962                &card->token.issuer_rm_w, QETH_MPC_TOKEN_LENGTH);
1963         memcpy(QETH_IDX_ACT_FUNC_LEVEL(iob->data),
1964                &card->info.func_level, 2);
1965         memcpy(QETH_IDX_ACT_QDIO_DEV_CUA(iob->data), &dev_id.devno, 2);
1966         memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &addr, 2);
1967 }
1968
1969 static int qeth_idx_activate_read_channel(struct qeth_card *card)
1970 {
1971         struct qeth_channel *channel = &card->read;
1972         struct qeth_cmd_buffer *iob;
1973         int rc;
1974
1975         QETH_CARD_TEXT(card, 2, "idxread");
1976
1977         iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
1978         if (!iob)
1979                 return -ENOMEM;
1980
1981         memcpy(iob->data, IDX_ACTIVATE_READ, IDX_ACTIVATE_SIZE);
1982         qeth_idx_setup_activate_cmd(card, iob);
1983         iob->callback = qeth_idx_activate_read_channel_cb;
1984
1985         rc = qeth_send_control_data(card, iob, NULL, NULL);
1986         if (rc)
1987                 return rc;
1988
1989         channel->state = CH_STATE_UP;
1990         return 0;
1991 }
1992
1993 static int qeth_idx_activate_write_channel(struct qeth_card *card)
1994 {
1995         struct qeth_channel *channel = &card->write;
1996         struct qeth_cmd_buffer *iob;
1997         int rc;
1998
1999         QETH_CARD_TEXT(card, 2, "idxwrite");
2000
2001         iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
2002         if (!iob)
2003                 return -ENOMEM;
2004
2005         memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE);
2006         qeth_idx_setup_activate_cmd(card, iob);
2007         iob->callback = qeth_idx_activate_write_channel_cb;
2008
2009         rc = qeth_send_control_data(card, iob, NULL, NULL);
2010         if (rc)
2011                 return rc;
2012
2013         channel->state = CH_STATE_UP;
2014         return 0;
2015 }
2016
2017 static int qeth_cm_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2018                 unsigned long data)
2019 {
2020         struct qeth_cmd_buffer *iob;
2021
2022         QETH_CARD_TEXT(card, 2, "cmenblcb");
2023
2024         iob = (struct qeth_cmd_buffer *) data;
2025         memcpy(&card->token.cm_filter_r,
2026                QETH_CM_ENABLE_RESP_FILTER_TOKEN(iob->data),
2027                QETH_MPC_TOKEN_LENGTH);
2028         return 0;
2029 }
2030
2031 static int qeth_cm_enable(struct qeth_card *card)
2032 {
2033         struct qeth_cmd_buffer *iob;
2034
2035         QETH_CARD_TEXT(card, 2, "cmenable");
2036
2037         iob = qeth_mpc_alloc_cmd(card, CM_ENABLE, CM_ENABLE_SIZE);
2038         if (!iob)
2039                 return -ENOMEM;
2040
2041         memcpy(QETH_CM_ENABLE_ISSUER_RM_TOKEN(iob->data),
2042                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2043         memcpy(QETH_CM_ENABLE_FILTER_TOKEN(iob->data),
2044                &card->token.cm_filter_w, QETH_MPC_TOKEN_LENGTH);
2045
2046         return qeth_send_control_data(card, iob, qeth_cm_enable_cb, NULL);
2047 }
2048
2049 static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2050                 unsigned long data)
2051 {
2052         struct qeth_cmd_buffer *iob;
2053
2054         QETH_CARD_TEXT(card, 2, "cmsetpcb");
2055
2056         iob = (struct qeth_cmd_buffer *) data;
2057         memcpy(&card->token.cm_connection_r,
2058                QETH_CM_SETUP_RESP_DEST_ADDR(iob->data),
2059                QETH_MPC_TOKEN_LENGTH);
2060         return 0;
2061 }
2062
2063 static int qeth_cm_setup(struct qeth_card *card)
2064 {
2065         struct qeth_cmd_buffer *iob;
2066
2067         QETH_CARD_TEXT(card, 2, "cmsetup");
2068
2069         iob = qeth_mpc_alloc_cmd(card, CM_SETUP, CM_SETUP_SIZE);
2070         if (!iob)
2071                 return -ENOMEM;
2072
2073         memcpy(QETH_CM_SETUP_DEST_ADDR(iob->data),
2074                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2075         memcpy(QETH_CM_SETUP_CONNECTION_TOKEN(iob->data),
2076                &card->token.cm_connection_w, QETH_MPC_TOKEN_LENGTH);
2077         memcpy(QETH_CM_SETUP_FILTER_TOKEN(iob->data),
2078                &card->token.cm_filter_r, QETH_MPC_TOKEN_LENGTH);
2079         return qeth_send_control_data(card, iob, qeth_cm_setup_cb, NULL);
2080 }
2081
2082 static int qeth_update_max_mtu(struct qeth_card *card, unsigned int max_mtu)
2083 {
2084         struct net_device *dev = card->dev;
2085         unsigned int new_mtu;
2086
2087         if (!max_mtu) {
2088                 /* IQD needs accurate max MTU to set up its RX buffers: */
2089                 if (IS_IQD(card))
2090                         return -EINVAL;
2091                 /* tolerate quirky HW: */
2092                 max_mtu = ETH_MAX_MTU;
2093         }
2094
2095         rtnl_lock();
2096         if (IS_IQD(card)) {
2097                 /* move any device with default MTU to new max MTU: */
2098                 new_mtu = (dev->mtu == dev->max_mtu) ? max_mtu : dev->mtu;
2099
2100                 /* adjust RX buffer size to new max MTU: */
2101                 card->qdio.in_buf_size = max_mtu + 2 * PAGE_SIZE;
2102                 if (dev->max_mtu && dev->max_mtu != max_mtu)
2103                         qeth_free_qdio_queues(card);
2104         } else {
2105                 if (dev->mtu)
2106                         new_mtu = dev->mtu;
2107                 /* default MTUs for first setup: */
2108                 else if (IS_LAYER2(card))
2109                         new_mtu = ETH_DATA_LEN;
2110                 else
2111                         new_mtu = ETH_DATA_LEN - 8; /* allow for LLC + SNAP */
2112         }
2113
2114         dev->max_mtu = max_mtu;
2115         dev->mtu = min(new_mtu, max_mtu);
2116         rtnl_unlock();
2117         return 0;
2118 }
2119
2120 static int qeth_get_mtu_outof_framesize(int framesize)
2121 {
2122         switch (framesize) {
2123         case 0x4000:
2124                 return 8192;
2125         case 0x6000:
2126                 return 16384;
2127         case 0xa000:
2128                 return 32768;
2129         case 0xffff:
2130                 return 57344;
2131         default:
2132                 return 0;
2133         }
2134 }
2135
2136 static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2137                 unsigned long data)
2138 {
2139         __u16 mtu, framesize;
2140         __u16 len;
2141         __u8 link_type;
2142         struct qeth_cmd_buffer *iob;
2143
2144         QETH_CARD_TEXT(card, 2, "ulpenacb");
2145
2146         iob = (struct qeth_cmd_buffer *) data;
2147         memcpy(&card->token.ulp_filter_r,
2148                QETH_ULP_ENABLE_RESP_FILTER_TOKEN(iob->data),
2149                QETH_MPC_TOKEN_LENGTH);
2150         if (IS_IQD(card)) {
2151                 memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2);
2152                 mtu = qeth_get_mtu_outof_framesize(framesize);
2153         } else {
2154                 mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data);
2155         }
2156         *(u16 *)reply->param = mtu;
2157
2158         memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2);
2159         if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) {
2160                 memcpy(&link_type,
2161                        QETH_ULP_ENABLE_RESP_LINK_TYPE(iob->data), 1);
2162                 card->info.link_type = link_type;
2163         } else
2164                 card->info.link_type = 0;
2165         QETH_CARD_TEXT_(card, 2, "link%d", card->info.link_type);
2166         return 0;
2167 }
2168
2169 static u8 qeth_mpc_select_prot_type(struct qeth_card *card)
2170 {
2171         if (IS_OSN(card))
2172                 return QETH_PROT_OSN2;
2173         return IS_LAYER2(card) ? QETH_PROT_LAYER2 : QETH_PROT_TCPIP;
2174 }
2175
2176 static int qeth_ulp_enable(struct qeth_card *card)
2177 {
2178         u8 prot_type = qeth_mpc_select_prot_type(card);
2179         struct qeth_cmd_buffer *iob;
2180         u16 max_mtu;
2181         int rc;
2182
2183         QETH_CARD_TEXT(card, 2, "ulpenabl");
2184
2185         iob = qeth_mpc_alloc_cmd(card, ULP_ENABLE, ULP_ENABLE_SIZE);
2186         if (!iob)
2187                 return -ENOMEM;
2188
2189         *(QETH_ULP_ENABLE_LINKNUM(iob->data)) = (u8) card->dev->dev_port;
2190         memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1);
2191         memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data),
2192                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2193         memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data),
2194                &card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH);
2195         rc = qeth_send_control_data(card, iob, qeth_ulp_enable_cb, &max_mtu);
2196         if (rc)
2197                 return rc;
2198         return qeth_update_max_mtu(card, max_mtu);
2199 }
2200
2201 static int qeth_ulp_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2202                 unsigned long data)
2203 {
2204         struct qeth_cmd_buffer *iob;
2205
2206         QETH_CARD_TEXT(card, 2, "ulpstpcb");
2207
2208         iob = (struct qeth_cmd_buffer *) data;
2209         memcpy(&card->token.ulp_connection_r,
2210                QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2211                QETH_MPC_TOKEN_LENGTH);
2212         if (!strncmp("00S", QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2213                      3)) {
2214                 QETH_CARD_TEXT(card, 2, "olmlimit");
2215                 dev_err(&card->gdev->dev, "A connection could not be "
2216                         "established because of an OLM limit\n");
2217                 return -EMLINK;
2218         }
2219         return 0;
2220 }
2221
2222 static int qeth_ulp_setup(struct qeth_card *card)
2223 {
2224         __u16 temp;
2225         struct qeth_cmd_buffer *iob;
2226         struct ccw_dev_id dev_id;
2227
2228         QETH_CARD_TEXT(card, 2, "ulpsetup");
2229
2230         iob = qeth_mpc_alloc_cmd(card, ULP_SETUP, ULP_SETUP_SIZE);
2231         if (!iob)
2232                 return -ENOMEM;
2233
2234         memcpy(QETH_ULP_SETUP_DEST_ADDR(iob->data),
2235                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2236         memcpy(QETH_ULP_SETUP_CONNECTION_TOKEN(iob->data),
2237                &card->token.ulp_connection_w, QETH_MPC_TOKEN_LENGTH);
2238         memcpy(QETH_ULP_SETUP_FILTER_TOKEN(iob->data),
2239                &card->token.ulp_filter_r, QETH_MPC_TOKEN_LENGTH);
2240
2241         ccw_device_get_id(CARD_DDEV(card), &dev_id);
2242         memcpy(QETH_ULP_SETUP_CUA(iob->data), &dev_id.devno, 2);
2243         temp = (card->info.cula << 8) + card->info.unit_addr2;
2244         memcpy(QETH_ULP_SETUP_REAL_DEVADDR(iob->data), &temp, 2);
2245         return qeth_send_control_data(card, iob, qeth_ulp_setup_cb, NULL);
2246 }
2247
2248 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *q, int bidx)
2249 {
2250         struct qeth_qdio_out_buffer *newbuf;
2251
2252         newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, GFP_ATOMIC);
2253         if (!newbuf)
2254                 return -ENOMEM;
2255
2256         newbuf->buffer = q->qdio_bufs[bidx];
2257         skb_queue_head_init(&newbuf->skb_list);
2258         lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key);
2259         newbuf->q = q;
2260         newbuf->next_pending = q->bufs[bidx];
2261         atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY);
2262         q->bufs[bidx] = newbuf;
2263         return 0;
2264 }
2265
2266 static void qeth_free_output_queue(struct qeth_qdio_out_q *q)
2267 {
2268         if (!q)
2269                 return;
2270
2271         qeth_drain_output_queue(q, true);
2272         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2273         kfree(q);
2274 }
2275
2276 static struct qeth_qdio_out_q *qeth_alloc_output_queue(void)
2277 {
2278         struct qeth_qdio_out_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
2279
2280         if (!q)
2281                 return NULL;
2282
2283         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
2284                 kfree(q);
2285                 return NULL;
2286         }
2287         return q;
2288 }
2289
2290 static void qeth_tx_completion_timer(struct timer_list *timer)
2291 {
2292         struct qeth_qdio_out_q *queue = from_timer(queue, timer, timer);
2293
2294         napi_schedule(&queue->napi);
2295         QETH_TXQ_STAT_INC(queue, completion_timer);
2296 }
2297
2298 static int qeth_alloc_qdio_queues(struct qeth_card *card)
2299 {
2300         int i, j;
2301
2302         QETH_CARD_TEXT(card, 2, "allcqdbf");
2303
2304         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED,
2305                 QETH_QDIO_ALLOCATED) != QETH_QDIO_UNINITIALIZED)
2306                 return 0;
2307
2308         QETH_CARD_TEXT(card, 2, "inq");
2309         card->qdio.in_q = qeth_alloc_qdio_queue();
2310         if (!card->qdio.in_q)
2311                 goto out_nomem;
2312
2313         /* inbound buffer pool */
2314         if (qeth_alloc_buffer_pool(card))
2315                 goto out_freeinq;
2316
2317         /* outbound */
2318         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2319                 struct qeth_qdio_out_q *queue;
2320
2321                 queue = qeth_alloc_output_queue();
2322                 if (!queue)
2323                         goto out_freeoutq;
2324                 QETH_CARD_TEXT_(card, 2, "outq %i", i);
2325                 QETH_CARD_HEX(card, 2, &queue, sizeof(void *));
2326                 card->qdio.out_qs[i] = queue;
2327                 queue->card = card;
2328                 queue->queue_no = i;
2329                 timer_setup(&queue->timer, qeth_tx_completion_timer, 0);
2330
2331                 /* give outbound qeth_qdio_buffers their qdio_buffers */
2332                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2333                         WARN_ON(queue->bufs[j]);
2334                         if (qeth_init_qdio_out_buf(queue, j))
2335                                 goto out_freeoutqbufs;
2336                 }
2337         }
2338
2339         /* completion */
2340         if (qeth_alloc_cq(card))
2341                 goto out_freeoutq;
2342
2343         return 0;
2344
2345 out_freeoutqbufs:
2346         while (j > 0) {
2347                 --j;
2348                 kmem_cache_free(qeth_qdio_outbuf_cache,
2349                                 card->qdio.out_qs[i]->bufs[j]);
2350                 card->qdio.out_qs[i]->bufs[j] = NULL;
2351         }
2352 out_freeoutq:
2353         while (i > 0) {
2354                 qeth_free_output_queue(card->qdio.out_qs[--i]);
2355                 card->qdio.out_qs[i] = NULL;
2356         }
2357         qeth_free_buffer_pool(card);
2358 out_freeinq:
2359         qeth_free_qdio_queue(card->qdio.in_q);
2360         card->qdio.in_q = NULL;
2361 out_nomem:
2362         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
2363         return -ENOMEM;
2364 }
2365
2366 static void qeth_free_qdio_queues(struct qeth_card *card)
2367 {
2368         int i, j;
2369
2370         if (atomic_xchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED) ==
2371                 QETH_QDIO_UNINITIALIZED)
2372                 return;
2373
2374         qeth_free_cq(card);
2375         cancel_delayed_work_sync(&card->buffer_reclaim_work);
2376         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2377                 if (card->qdio.in_q->bufs[j].rx_skb)
2378                         dev_kfree_skb_any(card->qdio.in_q->bufs[j].rx_skb);
2379         }
2380         qeth_free_qdio_queue(card->qdio.in_q);
2381         card->qdio.in_q = NULL;
2382         /* inbound buffer pool */
2383         qeth_free_buffer_pool(card);
2384         /* free outbound qdio_qs */
2385         for (i = 0; i < card->qdio.no_out_queues; i++) {
2386                 qeth_free_output_queue(card->qdio.out_qs[i]);
2387                 card->qdio.out_qs[i] = NULL;
2388         }
2389 }
2390
2391 static void qeth_create_qib_param_field(struct qeth_card *card,
2392                 char *param_field)
2393 {
2394
2395         param_field[0] = _ascebc['P'];
2396         param_field[1] = _ascebc['C'];
2397         param_field[2] = _ascebc['I'];
2398         param_field[3] = _ascebc['T'];
2399         *((unsigned int *) (&param_field[4])) = QETH_PCI_THRESHOLD_A(card);
2400         *((unsigned int *) (&param_field[8])) = QETH_PCI_THRESHOLD_B(card);
2401         *((unsigned int *) (&param_field[12])) = QETH_PCI_TIMER_VALUE(card);
2402 }
2403
2404 static void qeth_create_qib_param_field_blkt(struct qeth_card *card,
2405                 char *param_field)
2406 {
2407         param_field[16] = _ascebc['B'];
2408         param_field[17] = _ascebc['L'];
2409         param_field[18] = _ascebc['K'];
2410         param_field[19] = _ascebc['T'];
2411         *((unsigned int *) (&param_field[20])) = card->info.blkt.time_total;
2412         *((unsigned int *) (&param_field[24])) = card->info.blkt.inter_packet;
2413         *((unsigned int *) (&param_field[28])) =
2414                 card->info.blkt.inter_packet_jumbo;
2415 }
2416
2417 static int qeth_qdio_activate(struct qeth_card *card)
2418 {
2419         QETH_CARD_TEXT(card, 3, "qdioact");
2420         return qdio_activate(CARD_DDEV(card));
2421 }
2422
2423 static int qeth_dm_act(struct qeth_card *card)
2424 {
2425         struct qeth_cmd_buffer *iob;
2426
2427         QETH_CARD_TEXT(card, 2, "dmact");
2428
2429         iob = qeth_mpc_alloc_cmd(card, DM_ACT, DM_ACT_SIZE);
2430         if (!iob)
2431                 return -ENOMEM;
2432
2433         memcpy(QETH_DM_ACT_DEST_ADDR(iob->data),
2434                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2435         memcpy(QETH_DM_ACT_CONNECTION_TOKEN(iob->data),
2436                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2437         return qeth_send_control_data(card, iob, NULL, NULL);
2438 }
2439
2440 static int qeth_mpc_initialize(struct qeth_card *card)
2441 {
2442         int rc;
2443
2444         QETH_CARD_TEXT(card, 2, "mpcinit");
2445
2446         rc = qeth_issue_next_read(card);
2447         if (rc) {
2448                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
2449                 return rc;
2450         }
2451         rc = qeth_cm_enable(card);
2452         if (rc) {
2453                 QETH_CARD_TEXT_(card, 2, "2err%d", rc);
2454                 goto out_qdio;
2455         }
2456         rc = qeth_cm_setup(card);
2457         if (rc) {
2458                 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
2459                 goto out_qdio;
2460         }
2461         rc = qeth_ulp_enable(card);
2462         if (rc) {
2463                 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
2464                 goto out_qdio;
2465         }
2466         rc = qeth_ulp_setup(card);
2467         if (rc) {
2468                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2469                 goto out_qdio;
2470         }
2471         rc = qeth_alloc_qdio_queues(card);
2472         if (rc) {
2473                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2474                 goto out_qdio;
2475         }
2476         rc = qeth_qdio_establish(card);
2477         if (rc) {
2478                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
2479                 qeth_free_qdio_queues(card);
2480                 goto out_qdio;
2481         }
2482         rc = qeth_qdio_activate(card);
2483         if (rc) {
2484                 QETH_CARD_TEXT_(card, 2, "7err%d", rc);
2485                 goto out_qdio;
2486         }
2487         rc = qeth_dm_act(card);
2488         if (rc) {
2489                 QETH_CARD_TEXT_(card, 2, "8err%d", rc);
2490                 goto out_qdio;
2491         }
2492
2493         return 0;
2494 out_qdio:
2495         qeth_qdio_clear_card(card, !IS_IQD(card));
2496         qdio_free(CARD_DDEV(card));
2497         return rc;
2498 }
2499
2500 void qeth_print_status_message(struct qeth_card *card)
2501 {
2502         switch (card->info.type) {
2503         case QETH_CARD_TYPE_OSD:
2504         case QETH_CARD_TYPE_OSM:
2505         case QETH_CARD_TYPE_OSX:
2506                 /* VM will use a non-zero first character
2507                  * to indicate a HiperSockets like reporting
2508                  * of the level OSA sets the first character to zero
2509                  * */
2510                 if (!card->info.mcl_level[0]) {
2511                         sprintf(card->info.mcl_level, "%02x%02x",
2512                                 card->info.mcl_level[2],
2513                                 card->info.mcl_level[3]);
2514                         break;
2515                 }
2516                 /* fallthrough */
2517         case QETH_CARD_TYPE_IQD:
2518                 if (IS_VM_NIC(card) || (card->info.mcl_level[0] & 0x80)) {
2519                         card->info.mcl_level[0] = (char) _ebcasc[(__u8)
2520                                 card->info.mcl_level[0]];
2521                         card->info.mcl_level[1] = (char) _ebcasc[(__u8)
2522                                 card->info.mcl_level[1]];
2523                         card->info.mcl_level[2] = (char) _ebcasc[(__u8)
2524                                 card->info.mcl_level[2]];
2525                         card->info.mcl_level[3] = (char) _ebcasc[(__u8)
2526                                 card->info.mcl_level[3]];
2527                         card->info.mcl_level[QETH_MCL_LENGTH] = 0;
2528                 }
2529                 break;
2530         default:
2531                 memset(&card->info.mcl_level[0], 0, QETH_MCL_LENGTH + 1);
2532         }
2533         dev_info(&card->gdev->dev,
2534                  "Device is a%s card%s%s%s\nwith link type %s.\n",
2535                  qeth_get_cardname(card),
2536                  (card->info.mcl_level[0]) ? " (level: " : "",
2537                  (card->info.mcl_level[0]) ? card->info.mcl_level : "",
2538                  (card->info.mcl_level[0]) ? ")" : "",
2539                  qeth_get_cardname_short(card));
2540 }
2541 EXPORT_SYMBOL_GPL(qeth_print_status_message);
2542
2543 static void qeth_initialize_working_pool_list(struct qeth_card *card)
2544 {
2545         struct qeth_buffer_pool_entry *entry;
2546
2547         QETH_CARD_TEXT(card, 5, "inwrklst");
2548
2549         list_for_each_entry(entry,
2550                             &card->qdio.init_pool.entry_list, init_list) {
2551                 qeth_put_buffer_pool_entry(card, entry);
2552         }
2553 }
2554
2555 static struct qeth_buffer_pool_entry *qeth_find_free_buffer_pool_entry(
2556                                         struct qeth_card *card)
2557 {
2558         struct list_head *plh;
2559         struct qeth_buffer_pool_entry *entry;
2560         int i, free;
2561         struct page *page;
2562
2563         if (list_empty(&card->qdio.in_buf_pool.entry_list))
2564                 return NULL;
2565
2566         list_for_each(plh, &card->qdio.in_buf_pool.entry_list) {
2567                 entry = list_entry(plh, struct qeth_buffer_pool_entry, list);
2568                 free = 1;
2569                 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2570                         if (page_count(virt_to_page(entry->elements[i])) > 1) {
2571                                 free = 0;
2572                                 break;
2573                         }
2574                 }
2575                 if (free) {
2576                         list_del_init(&entry->list);
2577                         return entry;
2578                 }
2579         }
2580
2581         /* no free buffer in pool so take first one and swap pages */
2582         entry = list_entry(card->qdio.in_buf_pool.entry_list.next,
2583                         struct qeth_buffer_pool_entry, list);
2584         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2585                 if (page_count(virt_to_page(entry->elements[i])) > 1) {
2586                         page = alloc_page(GFP_ATOMIC);
2587                         if (!page) {
2588                                 return NULL;
2589                         } else {
2590                                 free_page((unsigned long)entry->elements[i]);
2591                                 entry->elements[i] = page_address(page);
2592                                 QETH_CARD_STAT_INC(card, rx_sg_alloc_page);
2593                         }
2594                 }
2595         }
2596         list_del_init(&entry->list);
2597         return entry;
2598 }
2599
2600 static int qeth_init_input_buffer(struct qeth_card *card,
2601                 struct qeth_qdio_buffer *buf)
2602 {
2603         struct qeth_buffer_pool_entry *pool_entry;
2604         int i;
2605
2606         if ((card->options.cq == QETH_CQ_ENABLED) && (!buf->rx_skb)) {
2607                 buf->rx_skb = netdev_alloc_skb(card->dev,
2608                                                QETH_RX_PULL_LEN + ETH_HLEN);
2609                 if (!buf->rx_skb)
2610                         return 1;
2611         }
2612
2613         pool_entry = qeth_find_free_buffer_pool_entry(card);
2614         if (!pool_entry)
2615                 return 1;
2616
2617         /*
2618          * since the buffer is accessed only from the input_tasklet
2619          * there shouldn't be a need to synchronize; also, since we use
2620          * the QETH_IN_BUF_REQUEUE_THRESHOLD we should never run  out off
2621          * buffers
2622          */
2623
2624         buf->pool_entry = pool_entry;
2625         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2626                 buf->buffer->element[i].length = PAGE_SIZE;
2627                 buf->buffer->element[i].addr =  pool_entry->elements[i];
2628                 if (i == QETH_MAX_BUFFER_ELEMENTS(card) - 1)
2629                         buf->buffer->element[i].eflags = SBAL_EFLAGS_LAST_ENTRY;
2630                 else
2631                         buf->buffer->element[i].eflags = 0;
2632                 buf->buffer->element[i].sflags = 0;
2633         }
2634         return 0;
2635 }
2636
2637 int qeth_init_qdio_queues(struct qeth_card *card)
2638 {
2639         unsigned int i;
2640         int rc;
2641
2642         QETH_CARD_TEXT(card, 2, "initqdqs");
2643
2644         /* inbound queue */
2645         qdio_reset_buffers(card->qdio.in_q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2646         memset(&card->rx, 0, sizeof(struct qeth_rx));
2647         qeth_initialize_working_pool_list(card);
2648         /*give only as many buffers to hardware as we have buffer pool entries*/
2649         for (i = 0; i < card->qdio.in_buf_pool.buf_count - 1; ++i)
2650                 qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]);
2651         card->qdio.in_q->next_buf_to_init =
2652                 card->qdio.in_buf_pool.buf_count - 1;
2653         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0, 0,
2654                      card->qdio.in_buf_pool.buf_count - 1);
2655         if (rc) {
2656                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
2657                 return rc;
2658         }
2659
2660         /* completion */
2661         rc = qeth_cq_init(card);
2662         if (rc) {
2663                 return rc;
2664         }
2665
2666         /* outbound queue */
2667         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2668                 struct qeth_qdio_out_q *queue = card->qdio.out_qs[i];
2669
2670                 qdio_reset_buffers(queue->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2671                 queue->max_elements = QETH_MAX_BUFFER_ELEMENTS(card);
2672                 queue->next_buf_to_fill = 0;
2673                 queue->do_pack = 0;
2674                 queue->prev_hdr = NULL;
2675                 queue->bulk_start = 0;
2676                 atomic_set(&queue->used_buffers, 0);
2677                 atomic_set(&queue->set_pci_flags_count, 0);
2678                 atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
2679                 netdev_tx_reset_queue(netdev_get_tx_queue(card->dev, i));
2680         }
2681         return 0;
2682 }
2683 EXPORT_SYMBOL_GPL(qeth_init_qdio_queues);
2684
2685 static void qeth_ipa_finalize_cmd(struct qeth_card *card,
2686                                   struct qeth_cmd_buffer *iob)
2687 {
2688         qeth_mpc_finalize_cmd(card, iob);
2689
2690         /* override with IPA-specific values: */
2691         __ipa_cmd(iob)->hdr.seqno = card->seqno.ipa++;
2692 }
2693
2694 void qeth_prepare_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
2695                           u16 cmd_length)
2696 {
2697         u8 prot_type = qeth_mpc_select_prot_type(card);
2698         u16 total_length = iob->length;
2699
2700         qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, total_length,
2701                        iob->data);
2702         iob->finalize = qeth_ipa_finalize_cmd;
2703
2704         memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
2705         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &total_length, 2);
2706         memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1);
2707         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &cmd_length, 2);
2708         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &cmd_length, 2);
2709         memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
2710                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2711         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &cmd_length, 2);
2712 }
2713 EXPORT_SYMBOL_GPL(qeth_prepare_ipa_cmd);
2714
2715 struct qeth_cmd_buffer *qeth_ipa_alloc_cmd(struct qeth_card *card,
2716                                            enum qeth_ipa_cmds cmd_code,
2717                                            enum qeth_prot_versions prot,
2718                                            unsigned int data_length)
2719 {
2720         enum qeth_link_types link_type = card->info.link_type;
2721         struct qeth_cmd_buffer *iob;
2722         struct qeth_ipacmd_hdr *hdr;
2723
2724         data_length += offsetof(struct qeth_ipa_cmd, data);
2725         iob = qeth_alloc_cmd(&card->write, IPA_PDU_HEADER_SIZE + data_length, 1,
2726                              QETH_IPA_TIMEOUT);
2727         if (!iob)
2728                 return NULL;
2729
2730         qeth_prepare_ipa_cmd(card, iob, data_length);
2731
2732         hdr = &__ipa_cmd(iob)->hdr;
2733         hdr->command = cmd_code;
2734         hdr->initiator = IPA_CMD_INITIATOR_HOST;
2735         /* hdr->seqno is set by qeth_send_control_data() */
2736         hdr->adapter_type = (link_type == QETH_LINK_TYPE_HSTR) ? 2 : 1;
2737         hdr->rel_adapter_no = (u8) card->dev->dev_port;
2738         hdr->prim_version_no = IS_LAYER2(card) ? 2 : 1;
2739         hdr->param_count = 1;
2740         hdr->prot_version = prot;
2741         return iob;
2742 }
2743 EXPORT_SYMBOL_GPL(qeth_ipa_alloc_cmd);
2744
2745 static int qeth_send_ipa_cmd_cb(struct qeth_card *card,
2746                                 struct qeth_reply *reply, unsigned long data)
2747 {
2748         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2749
2750         return (cmd->hdr.return_code) ? -EIO : 0;
2751 }
2752
2753 /**
2754  * qeth_send_ipa_cmd() - send an IPA command
2755  *
2756  * See qeth_send_control_data() for explanation of the arguments.
2757  */
2758
2759 int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
2760                 int (*reply_cb)(struct qeth_card *, struct qeth_reply*,
2761                         unsigned long),
2762                 void *reply_param)
2763 {
2764         int rc;
2765
2766         QETH_CARD_TEXT(card, 4, "sendipa");
2767
2768         if (card->read_or_write_problem) {
2769                 qeth_put_cmd(iob);
2770                 return -EIO;
2771         }
2772
2773         if (reply_cb == NULL)
2774                 reply_cb = qeth_send_ipa_cmd_cb;
2775         rc = qeth_send_control_data(card, iob, reply_cb, reply_param);
2776         if (rc == -ETIME) {
2777                 qeth_clear_ipacmd_list(card);
2778                 qeth_schedule_recovery(card);
2779         }
2780         return rc;
2781 }
2782 EXPORT_SYMBOL_GPL(qeth_send_ipa_cmd);
2783
2784 static int qeth_send_startlan_cb(struct qeth_card *card,
2785                                  struct qeth_reply *reply, unsigned long data)
2786 {
2787         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2788
2789         if (cmd->hdr.return_code == IPA_RC_LAN_OFFLINE)
2790                 return -ENETDOWN;
2791
2792         return (cmd->hdr.return_code) ? -EIO : 0;
2793 }
2794
2795 static int qeth_send_startlan(struct qeth_card *card)
2796 {
2797         struct qeth_cmd_buffer *iob;
2798
2799         QETH_CARD_TEXT(card, 2, "strtlan");
2800
2801         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_STARTLAN, QETH_PROT_NONE, 0);
2802         if (!iob)
2803                 return -ENOMEM;
2804         return qeth_send_ipa_cmd(card, iob, qeth_send_startlan_cb, NULL);
2805 }
2806
2807 static int qeth_setadpparms_inspect_rc(struct qeth_ipa_cmd *cmd)
2808 {
2809         if (!cmd->hdr.return_code)
2810                 cmd->hdr.return_code =
2811                         cmd->data.setadapterparms.hdr.return_code;
2812         return cmd->hdr.return_code;
2813 }
2814
2815 static int qeth_query_setadapterparms_cb(struct qeth_card *card,
2816                 struct qeth_reply *reply, unsigned long data)
2817 {
2818         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2819
2820         QETH_CARD_TEXT(card, 3, "quyadpcb");
2821         if (qeth_setadpparms_inspect_rc(cmd))
2822                 return -EIO;
2823
2824         if (cmd->data.setadapterparms.data.query_cmds_supp.lan_type & 0x7f) {
2825                 card->info.link_type =
2826                       cmd->data.setadapterparms.data.query_cmds_supp.lan_type;
2827                 QETH_CARD_TEXT_(card, 2, "lnk %d", card->info.link_type);
2828         }
2829         card->options.adp.supported_funcs =
2830                 cmd->data.setadapterparms.data.query_cmds_supp.supported_cmds;
2831         return 0;
2832 }
2833
2834 static struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card,
2835                                                     enum qeth_ipa_setadp_cmd adp_cmd,
2836                                                     unsigned int data_length)
2837 {
2838         struct qeth_ipacmd_setadpparms_hdr *hdr;
2839         struct qeth_cmd_buffer *iob;
2840
2841         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETADAPTERPARMS, QETH_PROT_IPV4,
2842                                  data_length +
2843                                  offsetof(struct qeth_ipacmd_setadpparms,
2844                                           data));
2845         if (!iob)
2846                 return NULL;
2847
2848         hdr = &__ipa_cmd(iob)->data.setadapterparms.hdr;
2849         hdr->cmdlength = sizeof(*hdr) + data_length;
2850         hdr->command_code = adp_cmd;
2851         hdr->used_total = 1;
2852         hdr->seq_no = 1;
2853         return iob;
2854 }
2855
2856 static int qeth_query_setadapterparms(struct qeth_card *card)
2857 {
2858         int rc;
2859         struct qeth_cmd_buffer *iob;
2860
2861         QETH_CARD_TEXT(card, 3, "queryadp");
2862         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_COMMANDS_SUPPORTED,
2863                                    SETADP_DATA_SIZEOF(query_cmds_supp));
2864         if (!iob)
2865                 return -ENOMEM;
2866         rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL);
2867         return rc;
2868 }
2869
2870 static int qeth_query_ipassists_cb(struct qeth_card *card,
2871                 struct qeth_reply *reply, unsigned long data)
2872 {
2873         struct qeth_ipa_cmd *cmd;
2874
2875         QETH_CARD_TEXT(card, 2, "qipasscb");
2876
2877         cmd = (struct qeth_ipa_cmd *) data;
2878
2879         switch (cmd->hdr.return_code) {
2880         case IPA_RC_SUCCESS:
2881                 break;
2882         case IPA_RC_NOTSUPP:
2883         case IPA_RC_L2_UNSUPPORTED_CMD:
2884                 QETH_CARD_TEXT(card, 2, "ipaunsup");
2885                 card->options.ipa4.supported_funcs |= IPA_SETADAPTERPARMS;
2886                 card->options.ipa6.supported_funcs |= IPA_SETADAPTERPARMS;
2887                 return -EOPNOTSUPP;
2888         default:
2889                 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Unhandled rc=%#x\n",
2890                                  CARD_DEVID(card), cmd->hdr.return_code);
2891                 return -EIO;
2892         }
2893
2894         if (cmd->hdr.prot_version == QETH_PROT_IPV4) {
2895                 card->options.ipa4.supported_funcs = cmd->hdr.ipa_supported;
2896                 card->options.ipa4.enabled_funcs = cmd->hdr.ipa_enabled;
2897         } else if (cmd->hdr.prot_version == QETH_PROT_IPV6) {
2898                 card->options.ipa6.supported_funcs = cmd->hdr.ipa_supported;
2899                 card->options.ipa6.enabled_funcs = cmd->hdr.ipa_enabled;
2900         } else
2901                 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Flawed LIC detected\n",
2902                                  CARD_DEVID(card));
2903         return 0;
2904 }
2905
2906 static int qeth_query_ipassists(struct qeth_card *card,
2907                                 enum qeth_prot_versions prot)
2908 {
2909         int rc;
2910         struct qeth_cmd_buffer *iob;
2911
2912         QETH_CARD_TEXT_(card, 2, "qipassi%i", prot);
2913         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_QIPASSIST, prot, 0);
2914         if (!iob)
2915                 return -ENOMEM;
2916         rc = qeth_send_ipa_cmd(card, iob, qeth_query_ipassists_cb, NULL);
2917         return rc;
2918 }
2919
2920 static int qeth_query_switch_attributes_cb(struct qeth_card *card,
2921                                 struct qeth_reply *reply, unsigned long data)
2922 {
2923         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2924         struct qeth_query_switch_attributes *attrs;
2925         struct qeth_switch_info *sw_info;
2926
2927         QETH_CARD_TEXT(card, 2, "qswiatcb");
2928         if (qeth_setadpparms_inspect_rc(cmd))
2929                 return -EIO;
2930
2931         sw_info = (struct qeth_switch_info *)reply->param;
2932         attrs = &cmd->data.setadapterparms.data.query_switch_attributes;
2933         sw_info->capabilities = attrs->capabilities;
2934         sw_info->settings = attrs->settings;
2935         QETH_CARD_TEXT_(card, 2, "%04x%04x", sw_info->capabilities,
2936                         sw_info->settings);
2937         return 0;
2938 }
2939
2940 int qeth_query_switch_attributes(struct qeth_card *card,
2941                                  struct qeth_switch_info *sw_info)
2942 {
2943         struct qeth_cmd_buffer *iob;
2944
2945         QETH_CARD_TEXT(card, 2, "qswiattr");
2946         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES))
2947                 return -EOPNOTSUPP;
2948         if (!netif_carrier_ok(card->dev))
2949                 return -ENOMEDIUM;
2950         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES, 0);
2951         if (!iob)
2952                 return -ENOMEM;
2953         return qeth_send_ipa_cmd(card, iob,
2954                                 qeth_query_switch_attributes_cb, sw_info);
2955 }
2956
2957 struct qeth_cmd_buffer *qeth_get_diag_cmd(struct qeth_card *card,
2958                                           enum qeth_diags_cmds sub_cmd,
2959                                           unsigned int data_length)
2960 {
2961         struct qeth_ipacmd_diagass *cmd;
2962         struct qeth_cmd_buffer *iob;
2963
2964         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SET_DIAG_ASS, QETH_PROT_NONE,
2965                                  DIAG_HDR_LEN + data_length);
2966         if (!iob)
2967                 return NULL;
2968
2969         cmd = &__ipa_cmd(iob)->data.diagass;
2970         cmd->subcmd_len = DIAG_SUB_HDR_LEN + data_length;
2971         cmd->subcmd = sub_cmd;
2972         return iob;
2973 }
2974 EXPORT_SYMBOL_GPL(qeth_get_diag_cmd);
2975
2976 static int qeth_query_setdiagass_cb(struct qeth_card *card,
2977                 struct qeth_reply *reply, unsigned long data)
2978 {
2979         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2980         u16 rc = cmd->hdr.return_code;
2981
2982         if (rc) {
2983                 QETH_CARD_TEXT_(card, 2, "diagq:%x", rc);
2984                 return -EIO;
2985         }
2986
2987         card->info.diagass_support = cmd->data.diagass.ext;
2988         return 0;
2989 }
2990
2991 static int qeth_query_setdiagass(struct qeth_card *card)
2992 {
2993         struct qeth_cmd_buffer *iob;
2994
2995         QETH_CARD_TEXT(card, 2, "qdiagass");
2996         iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_QUERY, 0);
2997         if (!iob)
2998                 return -ENOMEM;
2999         return qeth_send_ipa_cmd(card, iob, qeth_query_setdiagass_cb, NULL);
3000 }
3001
3002 static void qeth_get_trap_id(struct qeth_card *card, struct qeth_trap_id *tid)
3003 {
3004         unsigned long info = get_zeroed_page(GFP_KERNEL);
3005         struct sysinfo_2_2_2 *info222 = (struct sysinfo_2_2_2 *)info;
3006         struct sysinfo_3_2_2 *info322 = (struct sysinfo_3_2_2 *)info;
3007         struct ccw_dev_id ccwid;
3008         int level;
3009
3010         tid->chpid = card->info.chpid;
3011         ccw_device_get_id(CARD_RDEV(card), &ccwid);
3012         tid->ssid = ccwid.ssid;
3013         tid->devno = ccwid.devno;
3014         if (!info)
3015                 return;
3016         level = stsi(NULL, 0, 0, 0);
3017         if ((level >= 2) && (stsi(info222, 2, 2, 2) == 0))
3018                 tid->lparnr = info222->lpar_number;
3019         if ((level >= 3) && (stsi(info322, 3, 2, 2) == 0)) {
3020                 EBCASC(info322->vm[0].name, sizeof(info322->vm[0].name));
3021                 memcpy(tid->vmname, info322->vm[0].name, sizeof(tid->vmname));
3022         }
3023         free_page(info);
3024         return;
3025 }
3026
3027 static int qeth_hw_trap_cb(struct qeth_card *card,
3028                 struct qeth_reply *reply, unsigned long data)
3029 {
3030         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3031         u16 rc = cmd->hdr.return_code;
3032
3033         if (rc) {
3034                 QETH_CARD_TEXT_(card, 2, "trapc:%x", rc);
3035                 return -EIO;
3036         }
3037         return 0;
3038 }
3039
3040 int qeth_hw_trap(struct qeth_card *card, enum qeth_diags_trap_action action)
3041 {
3042         struct qeth_cmd_buffer *iob;
3043         struct qeth_ipa_cmd *cmd;
3044
3045         QETH_CARD_TEXT(card, 2, "diagtrap");
3046         iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_TRAP, 64);
3047         if (!iob)
3048                 return -ENOMEM;
3049         cmd = __ipa_cmd(iob);
3050         cmd->data.diagass.type = 1;
3051         cmd->data.diagass.action = action;
3052         switch (action) {
3053         case QETH_DIAGS_TRAP_ARM:
3054                 cmd->data.diagass.options = 0x0003;
3055                 cmd->data.diagass.ext = 0x00010000 +
3056                         sizeof(struct qeth_trap_id);
3057                 qeth_get_trap_id(card,
3058                         (struct qeth_trap_id *)cmd->data.diagass.cdata);
3059                 break;
3060         case QETH_DIAGS_TRAP_DISARM:
3061                 cmd->data.diagass.options = 0x0001;
3062                 break;
3063         case QETH_DIAGS_TRAP_CAPTURE:
3064                 break;
3065         }
3066         return qeth_send_ipa_cmd(card, iob, qeth_hw_trap_cb, NULL);
3067 }
3068 EXPORT_SYMBOL_GPL(qeth_hw_trap);
3069
3070 static int qeth_check_qdio_errors(struct qeth_card *card,
3071                                   struct qdio_buffer *buf,
3072                                   unsigned int qdio_error,
3073                                   const char *dbftext)
3074 {
3075         if (qdio_error) {
3076                 QETH_CARD_TEXT(card, 2, dbftext);
3077                 QETH_CARD_TEXT_(card, 2, " F15=%02X",
3078                                buf->element[15].sflags);
3079                 QETH_CARD_TEXT_(card, 2, " F14=%02X",
3080                                buf->element[14].sflags);
3081                 QETH_CARD_TEXT_(card, 2, " qerr=%X", qdio_error);
3082                 if ((buf->element[15].sflags) == 0x12) {
3083                         QETH_CARD_STAT_INC(card, rx_dropped);
3084                         return 0;
3085                 } else
3086                         return 1;
3087         }
3088         return 0;
3089 }
3090
3091 static void qeth_queue_input_buffer(struct qeth_card *card, int index)
3092 {
3093         struct qeth_qdio_q *queue = card->qdio.in_q;
3094         struct list_head *lh;
3095         int count;
3096         int i;
3097         int rc;
3098         int newcount = 0;
3099
3100         count = (index < queue->next_buf_to_init)?
3101                 card->qdio.in_buf_pool.buf_count -
3102                 (queue->next_buf_to_init - index) :
3103                 card->qdio.in_buf_pool.buf_count -
3104                 (queue->next_buf_to_init + QDIO_MAX_BUFFERS_PER_Q - index);
3105         /* only requeue at a certain threshold to avoid SIGAs */
3106         if (count >= QETH_IN_BUF_REQUEUE_THRESHOLD(card)) {
3107                 for (i = queue->next_buf_to_init;
3108                      i < queue->next_buf_to_init + count; ++i) {
3109                         if (qeth_init_input_buffer(card,
3110                                 &queue->bufs[i % QDIO_MAX_BUFFERS_PER_Q])) {
3111                                 break;
3112                         } else {
3113                                 newcount++;
3114                         }
3115                 }
3116
3117                 if (newcount < count) {
3118                         /* we are in memory shortage so we switch back to
3119                            traditional skb allocation and drop packages */
3120                         atomic_set(&card->force_alloc_skb, 3);
3121                         count = newcount;
3122                 } else {
3123                         atomic_add_unless(&card->force_alloc_skb, -1, 0);
3124                 }
3125
3126                 if (!count) {
3127                         i = 0;
3128                         list_for_each(lh, &card->qdio.in_buf_pool.entry_list)
3129                                 i++;
3130                         if (i == card->qdio.in_buf_pool.buf_count) {
3131                                 QETH_CARD_TEXT(card, 2, "qsarbw");
3132                                 card->reclaim_index = index;
3133                                 schedule_delayed_work(
3134                                         &card->buffer_reclaim_work,
3135                                         QETH_RECLAIM_WORK_TIME);
3136                         }
3137                         return;
3138                 }
3139
3140                 /*
3141                  * according to old code it should be avoided to requeue all
3142                  * 128 buffers in order to benefit from PCI avoidance.
3143                  * this function keeps at least one buffer (the buffer at
3144                  * 'index') un-requeued -> this buffer is the first buffer that
3145                  * will be requeued the next time
3146                  */
3147                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0,
3148                              queue->next_buf_to_init, count);
3149                 if (rc) {
3150                         QETH_CARD_TEXT(card, 2, "qinberr");
3151                 }
3152                 queue->next_buf_to_init = (queue->next_buf_to_init + count) %
3153                                           QDIO_MAX_BUFFERS_PER_Q;
3154         }
3155 }
3156
3157 static void qeth_buffer_reclaim_work(struct work_struct *work)
3158 {
3159         struct qeth_card *card = container_of(work, struct qeth_card,
3160                 buffer_reclaim_work.work);
3161
3162         QETH_CARD_TEXT_(card, 2, "brw:%x", card->reclaim_index);
3163         qeth_queue_input_buffer(card, card->reclaim_index);
3164 }
3165
3166 static void qeth_handle_send_error(struct qeth_card *card,
3167                 struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err)
3168 {
3169         int sbalf15 = buffer->buffer->element[15].sflags;
3170
3171         QETH_CARD_TEXT(card, 6, "hdsnderr");
3172         qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr");
3173
3174         if (!qdio_err)
3175                 return;
3176
3177         if ((sbalf15 >= 15) && (sbalf15 <= 31))
3178                 return;
3179
3180         QETH_CARD_TEXT(card, 1, "lnkfail");
3181         QETH_CARD_TEXT_(card, 1, "%04x %02x",
3182                        (u16)qdio_err, (u8)sbalf15);
3183 }
3184
3185 /**
3186  * qeth_prep_flush_pack_buffer - Prepares flushing of a packing buffer.
3187  * @queue: queue to check for packing buffer
3188  *
3189  * Returns number of buffers that were prepared for flush.
3190  */
3191 static int qeth_prep_flush_pack_buffer(struct qeth_qdio_out_q *queue)
3192 {
3193         struct qeth_qdio_out_buffer *buffer;
3194
3195         buffer = queue->bufs[queue->next_buf_to_fill];
3196         if ((atomic_read(&buffer->state) == QETH_QDIO_BUF_EMPTY) &&
3197             (buffer->next_element_to_fill > 0)) {
3198                 /* it's a packing buffer */
3199                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3200                 queue->next_buf_to_fill =
3201                         (queue->next_buf_to_fill + 1) % QDIO_MAX_BUFFERS_PER_Q;
3202                 return 1;
3203         }
3204         return 0;
3205 }
3206
3207 /*
3208  * Switched to packing state if the number of used buffers on a queue
3209  * reaches a certain limit.
3210  */
3211 static void qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q *queue)
3212 {
3213         if (!queue->do_pack) {
3214                 if (atomic_read(&queue->used_buffers)
3215                     >= QETH_HIGH_WATERMARK_PACK){
3216                         /* switch non-PACKING -> PACKING */
3217                         QETH_CARD_TEXT(queue->card, 6, "np->pack");
3218                         QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3219                         queue->do_pack = 1;
3220                 }
3221         }
3222 }
3223
3224 /*
3225  * Switches from packing to non-packing mode. If there is a packing
3226  * buffer on the queue this buffer will be prepared to be flushed.
3227  * In that case 1 is returned to inform the caller. If no buffer
3228  * has to be flushed, zero is returned.
3229  */
3230 static int qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q *queue)
3231 {
3232         if (queue->do_pack) {
3233                 if (atomic_read(&queue->used_buffers)
3234                     <= QETH_LOW_WATERMARK_PACK) {
3235                         /* switch PACKING -> non-PACKING */
3236                         QETH_CARD_TEXT(queue->card, 6, "pack->np");
3237                         QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3238                         queue->do_pack = 0;
3239                         return qeth_prep_flush_pack_buffer(queue);
3240                 }
3241         }
3242         return 0;
3243 }
3244
3245 static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
3246                                int count)
3247 {
3248         struct qeth_card *card = queue->card;
3249         struct qeth_qdio_out_buffer *buf;
3250         int rc;
3251         int i;
3252         unsigned int qdio_flags;
3253
3254         for (i = index; i < index + count; ++i) {
3255                 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3256                 buf = queue->bufs[bidx];
3257                 buf->buffer->element[buf->next_element_to_fill - 1].eflags |=
3258                                 SBAL_EFLAGS_LAST_ENTRY;
3259
3260                 if (queue->bufstates)
3261                         queue->bufstates[bidx].user = buf;
3262
3263                 if (IS_IQD(queue->card))
3264                         continue;
3265
3266                 if (!queue->do_pack) {
3267                         if ((atomic_read(&queue->used_buffers) >=
3268                                 (QETH_HIGH_WATERMARK_PACK -
3269                                  QETH_WATERMARK_PACK_FUZZ)) &&
3270                             !atomic_read(&queue->set_pci_flags_count)) {
3271                                 /* it's likely that we'll go to packing
3272                                  * mode soon */
3273                                 atomic_inc(&queue->set_pci_flags_count);
3274                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3275                         }
3276                 } else {
3277                         if (!atomic_read(&queue->set_pci_flags_count)) {
3278                                 /*
3279                                  * there's no outstanding PCI any more, so we
3280                                  * have to request a PCI to be sure the the PCI
3281                                  * will wake at some time in the future then we
3282                                  * can flush packed buffers that might still be
3283                                  * hanging around, which can happen if no
3284                                  * further send was requested by the stack
3285                                  */
3286                                 atomic_inc(&queue->set_pci_flags_count);
3287                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3288                         }
3289                 }
3290         }
3291
3292         qdio_flags = QDIO_FLAG_SYNC_OUTPUT;
3293         if (atomic_read(&queue->set_pci_flags_count))
3294                 qdio_flags |= QDIO_FLAG_PCI_OUT;
3295         rc = do_QDIO(CARD_DDEV(queue->card), qdio_flags,
3296                      queue->queue_no, index, count);
3297
3298         /* Fake the TX completion interrupt: */
3299         if (IS_IQD(card))
3300                 napi_schedule(&queue->napi);
3301
3302         if (rc) {
3303                 /* ignore temporary SIGA errors without busy condition */
3304                 if (rc == -ENOBUFS)
3305                         return;
3306                 QETH_CARD_TEXT(queue->card, 2, "flushbuf");
3307                 QETH_CARD_TEXT_(queue->card, 2, " q%d", queue->queue_no);
3308                 QETH_CARD_TEXT_(queue->card, 2, " idx%d", index);
3309                 QETH_CARD_TEXT_(queue->card, 2, " c%d", count);
3310                 QETH_CARD_TEXT_(queue->card, 2, " err%d", rc);
3311
3312                 /* this must not happen under normal circumstances. if it
3313                  * happens something is really wrong -> recover */
3314                 qeth_schedule_recovery(queue->card);
3315                 return;
3316         }
3317 }
3318
3319 static void qeth_flush_queue(struct qeth_qdio_out_q *queue)
3320 {
3321         qeth_flush_buffers(queue, queue->bulk_start, 1);
3322
3323         queue->bulk_start = QDIO_BUFNR(queue->bulk_start + 1);
3324         queue->prev_hdr = NULL;
3325 }
3326
3327 static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue)
3328 {
3329         int index;
3330         int flush_cnt = 0;
3331         int q_was_packing = 0;
3332
3333         /*
3334          * check if weed have to switch to non-packing mode or if
3335          * we have to get a pci flag out on the queue
3336          */
3337         if ((atomic_read(&queue->used_buffers) <= QETH_LOW_WATERMARK_PACK) ||
3338             !atomic_read(&queue->set_pci_flags_count)) {
3339                 if (atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH) ==
3340                                 QETH_OUT_Q_UNLOCKED) {
3341                         /*
3342                          * If we get in here, there was no action in
3343                          * do_send_packet. So, we check if there is a
3344                          * packing buffer to be flushed here.
3345                          */
3346                         index = queue->next_buf_to_fill;
3347                         q_was_packing = queue->do_pack;
3348                         /* queue->do_pack may change */
3349                         barrier();
3350                         flush_cnt += qeth_switch_to_nonpacking_if_needed(queue);
3351                         if (!flush_cnt &&
3352                             !atomic_read(&queue->set_pci_flags_count))
3353                                 flush_cnt += qeth_prep_flush_pack_buffer(queue);
3354                         if (q_was_packing)
3355                                 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_cnt);
3356                         if (flush_cnt)
3357                                 qeth_flush_buffers(queue, index, flush_cnt);
3358                         atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
3359                 }
3360         }
3361 }
3362
3363 static void qeth_qdio_start_poll(struct ccw_device *ccwdev, int queue,
3364                                  unsigned long card_ptr)
3365 {
3366         struct qeth_card *card = (struct qeth_card *)card_ptr;
3367
3368         if (card->dev->flags & IFF_UP)
3369                 napi_schedule(&card->napi);
3370 }
3371
3372 int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq)
3373 {
3374         int rc;
3375
3376         if (card->options.cq ==  QETH_CQ_NOTAVAILABLE) {
3377                 rc = -1;
3378                 goto out;
3379         } else {
3380                 if (card->options.cq == cq) {
3381                         rc = 0;
3382                         goto out;
3383                 }
3384
3385                 if (card->state != CARD_STATE_DOWN) {
3386                         rc = -1;
3387                         goto out;
3388                 }
3389
3390                 qeth_free_qdio_queues(card);
3391                 card->options.cq = cq;
3392                 rc = 0;
3393         }
3394 out:
3395         return rc;
3396
3397 }
3398 EXPORT_SYMBOL_GPL(qeth_configure_cq);
3399
3400 static void qeth_qdio_cq_handler(struct qeth_card *card, unsigned int qdio_err,
3401                                  unsigned int queue, int first_element,
3402                                  int count)
3403 {
3404         struct qeth_qdio_q *cq = card->qdio.c_q;
3405         int i;
3406         int rc;
3407
3408         if (!qeth_is_cq(card, queue))
3409                 return;
3410
3411         QETH_CARD_TEXT_(card, 5, "qcqhe%d", first_element);
3412         QETH_CARD_TEXT_(card, 5, "qcqhc%d", count);
3413         QETH_CARD_TEXT_(card, 5, "qcqherr%d", qdio_err);
3414
3415         if (qdio_err) {
3416                 netif_tx_stop_all_queues(card->dev);
3417                 qeth_schedule_recovery(card);
3418                 return;
3419         }
3420
3421         for (i = first_element; i < first_element + count; ++i) {
3422                 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3423                 struct qdio_buffer *buffer = cq->qdio_bufs[bidx];
3424                 int e = 0;
3425
3426                 while ((e < QDIO_MAX_ELEMENTS_PER_BUFFER) &&
3427                        buffer->element[e].addr) {
3428                         unsigned long phys_aob_addr;
3429
3430                         phys_aob_addr = (unsigned long) buffer->element[e].addr;
3431                         qeth_qdio_handle_aob(card, phys_aob_addr);
3432                         ++e;
3433                 }
3434                 qeth_scrub_qdio_buffer(buffer, QDIO_MAX_ELEMENTS_PER_BUFFER);
3435         }
3436         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, queue,
3437                     card->qdio.c_q->next_buf_to_init,
3438                     count);
3439         if (rc) {
3440                 dev_warn(&card->gdev->dev,
3441                         "QDIO reported an error, rc=%i\n", rc);
3442                 QETH_CARD_TEXT(card, 2, "qcqherr");
3443         }
3444         card->qdio.c_q->next_buf_to_init = (card->qdio.c_q->next_buf_to_init
3445                                    + count) % QDIO_MAX_BUFFERS_PER_Q;
3446 }
3447
3448 static void qeth_qdio_input_handler(struct ccw_device *ccwdev,
3449                                     unsigned int qdio_err, int queue,
3450                                     int first_elem, int count,
3451                                     unsigned long card_ptr)
3452 {
3453         struct qeth_card *card = (struct qeth_card *)card_ptr;
3454
3455         QETH_CARD_TEXT_(card, 2, "qihq%d", queue);
3456         QETH_CARD_TEXT_(card, 2, "qiec%d", qdio_err);
3457
3458         if (qeth_is_cq(card, queue))
3459                 qeth_qdio_cq_handler(card, qdio_err, queue, first_elem, count);
3460         else if (qdio_err)
3461                 qeth_schedule_recovery(card);
3462 }
3463
3464 static void qeth_qdio_output_handler(struct ccw_device *ccwdev,
3465                                      unsigned int qdio_error, int __queue,
3466                                      int first_element, int count,
3467                                      unsigned long card_ptr)
3468 {
3469         struct qeth_card *card        = (struct qeth_card *) card_ptr;
3470         struct qeth_qdio_out_q *queue = card->qdio.out_qs[__queue];
3471         struct qeth_qdio_out_buffer *buffer;
3472         struct net_device *dev = card->dev;
3473         struct netdev_queue *txq;
3474         int i;
3475
3476         QETH_CARD_TEXT(card, 6, "qdouhdl");
3477         if (qdio_error & QDIO_ERROR_FATAL) {
3478                 QETH_CARD_TEXT(card, 2, "achkcond");
3479                 netif_tx_stop_all_queues(dev);
3480                 qeth_schedule_recovery(card);
3481                 return;
3482         }
3483
3484         for (i = first_element; i < (first_element + count); ++i) {
3485                 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3486                 buffer = queue->bufs[bidx];
3487                 qeth_handle_send_error(card, buffer, qdio_error);
3488                 qeth_clear_output_buffer(queue, buffer, qdio_error, 0);
3489         }
3490
3491         atomic_sub(count, &queue->used_buffers);
3492         qeth_check_outbound_queue(queue);
3493
3494         txq = netdev_get_tx_queue(dev, __queue);
3495         /* xmit may have observed the full-condition, but not yet stopped the
3496          * txq. In which case the code below won't trigger. So before returning,
3497          * xmit will re-check the txq's fill level and wake it up if needed.
3498          */
3499         if (netif_tx_queue_stopped(txq) && !qeth_out_queue_is_full(queue))
3500                 netif_tx_wake_queue(txq);
3501 }
3502
3503 /**
3504  * Note: Function assumes that we have 4 outbound queues.
3505  */
3506 int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb)
3507 {
3508         struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
3509         u8 tos;
3510
3511         switch (card->qdio.do_prio_queueing) {
3512         case QETH_PRIO_Q_ING_TOS:
3513         case QETH_PRIO_Q_ING_PREC:
3514                 switch (qeth_get_ip_version(skb)) {
3515                 case 4:
3516                         tos = ipv4_get_dsfield(ip_hdr(skb));
3517                         break;
3518                 case 6:
3519                         tos = ipv6_get_dsfield(ipv6_hdr(skb));
3520                         break;
3521                 default:
3522                         return card->qdio.default_out_queue;
3523                 }
3524                 if (card->qdio.do_prio_queueing == QETH_PRIO_Q_ING_PREC)
3525                         return ~tos >> 6 & 3;
3526                 if (tos & IPTOS_MINCOST)
3527                         return 3;
3528                 if (tos & IPTOS_RELIABILITY)
3529                         return 2;
3530                 if (tos & IPTOS_THROUGHPUT)
3531                         return 1;
3532                 if (tos & IPTOS_LOWDELAY)
3533                         return 0;
3534                 break;
3535         case QETH_PRIO_Q_ING_SKB:
3536                 if (skb->priority > 5)
3537                         return 0;
3538                 return ~skb->priority >> 1 & 3;
3539         case QETH_PRIO_Q_ING_VLAN:
3540                 if (veth->h_vlan_proto == htons(ETH_P_8021Q))
3541                         return ~ntohs(veth->h_vlan_TCI) >>
3542                                (VLAN_PRIO_SHIFT + 1) & 3;
3543                 break;
3544         default:
3545                 break;
3546         }
3547         return card->qdio.default_out_queue;
3548 }
3549 EXPORT_SYMBOL_GPL(qeth_get_priority_queue);
3550
3551 /**
3552  * qeth_get_elements_for_frags() -      find number of SBALEs for skb frags.
3553  * @skb:                                SKB address
3554  *
3555  * Returns the number of pages, and thus QDIO buffer elements, needed to cover
3556  * fragmented part of the SKB. Returns zero for linear SKB.
3557  */
3558 static int qeth_get_elements_for_frags(struct sk_buff *skb)
3559 {
3560         int cnt, elements = 0;
3561
3562         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3563                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
3564
3565                 elements += qeth_get_elements_for_range(
3566                         (addr_t)skb_frag_address(frag),
3567                         (addr_t)skb_frag_address(frag) + skb_frag_size(frag));
3568         }
3569         return elements;
3570 }
3571
3572 /**
3573  * qeth_count_elements() -      Counts the number of QDIO buffer elements needed
3574  *                              to transmit an skb.
3575  * @skb:                        the skb to operate on.
3576  * @data_offset:                skip this part of the skb's linear data
3577  *
3578  * Returns the number of pages, and thus QDIO buffer elements, needed to map the
3579  * skb's data (both its linear part and paged fragments).
3580  */
3581 unsigned int qeth_count_elements(struct sk_buff *skb, unsigned int data_offset)
3582 {
3583         unsigned int elements = qeth_get_elements_for_frags(skb);
3584         addr_t end = (addr_t)skb->data + skb_headlen(skb);
3585         addr_t start = (addr_t)skb->data + data_offset;
3586
3587         if (start != end)
3588                 elements += qeth_get_elements_for_range(start, end);
3589         return elements;
3590 }
3591 EXPORT_SYMBOL_GPL(qeth_count_elements);
3592
3593 #define QETH_HDR_CACHE_OBJ_SIZE         (sizeof(struct qeth_hdr_tso) + \
3594                                          MAX_TCP_HEADER)
3595
3596 /**
3597  * qeth_add_hw_header() - add a HW header to an skb.
3598  * @skb: skb that the HW header should be added to.
3599  * @hdr: double pointer to a qeth_hdr. When returning with >= 0,
3600  *       it contains a valid pointer to a qeth_hdr.
3601  * @hdr_len: length of the HW header.
3602  * @proto_len: length of protocol headers that need to be in same page as the
3603  *             HW header.
3604  *
3605  * Returns the pushed length. If the header can't be pushed on
3606  * (eg. because it would cross a page boundary), it is allocated from
3607  * the cache instead and 0 is returned.
3608  * The number of needed buffer elements is returned in @elements.
3609  * Error to create the hdr is indicated by returning with < 0.
3610  */
3611 static int qeth_add_hw_header(struct qeth_qdio_out_q *queue,
3612                               struct sk_buff *skb, struct qeth_hdr **hdr,
3613                               unsigned int hdr_len, unsigned int proto_len,
3614                               unsigned int *elements)
3615 {
3616         const unsigned int contiguous = proto_len ? proto_len : 1;
3617         const unsigned int max_elements = queue->max_elements;
3618         unsigned int __elements;
3619         addr_t start, end;
3620         bool push_ok;
3621         int rc;
3622
3623 check_layout:
3624         start = (addr_t)skb->data - hdr_len;
3625         end = (addr_t)skb->data;
3626
3627         if (qeth_get_elements_for_range(start, end + contiguous) == 1) {
3628                 /* Push HW header into same page as first protocol header. */
3629                 push_ok = true;
3630                 /* ... but TSO always needs a separate element for headers: */
3631                 if (skb_is_gso(skb))
3632                         __elements = 1 + qeth_count_elements(skb, proto_len);
3633                 else
3634                         __elements = qeth_count_elements(skb, 0);
3635         } else if (!proto_len && PAGE_ALIGNED(skb->data)) {
3636                 /* Push HW header into preceding page, flush with skb->data. */
3637                 push_ok = true;
3638                 __elements = 1 + qeth_count_elements(skb, 0);
3639         } else {
3640                 /* Use header cache, copy protocol headers up. */
3641                 push_ok = false;
3642                 __elements = 1 + qeth_count_elements(skb, proto_len);
3643         }
3644
3645         /* Compress skb to fit into one IO buffer: */
3646         if (__elements > max_elements) {
3647                 if (!skb_is_nonlinear(skb)) {
3648                         /* Drop it, no easy way of shrinking it further. */
3649                         QETH_DBF_MESSAGE(2, "Dropped an oversized skb (Max Elements=%u / Actual=%u / Length=%u).\n",
3650                                          max_elements, __elements, skb->len);
3651                         return -E2BIG;
3652                 }
3653
3654                 rc = skb_linearize(skb);
3655                 if (rc) {
3656                         QETH_TXQ_STAT_INC(queue, skbs_linearized_fail);
3657                         return rc;
3658                 }
3659
3660                 QETH_TXQ_STAT_INC(queue, skbs_linearized);
3661                 /* Linearization changed the layout, re-evaluate: */
3662                 goto check_layout;
3663         }
3664
3665         *elements = __elements;
3666         /* Add the header: */
3667         if (push_ok) {
3668                 *hdr = skb_push(skb, hdr_len);
3669                 return hdr_len;
3670         }
3671         /* fall back */
3672         if (hdr_len + proto_len > QETH_HDR_CACHE_OBJ_SIZE)
3673                 return -E2BIG;
3674         *hdr = kmem_cache_alloc(qeth_core_header_cache, GFP_ATOMIC);
3675         if (!*hdr)
3676                 return -ENOMEM;
3677         /* Copy protocol headers behind HW header: */
3678         skb_copy_from_linear_data(skb, ((char *)*hdr) + hdr_len, proto_len);
3679         return 0;
3680 }
3681
3682 static bool qeth_iqd_may_bulk(struct qeth_qdio_out_q *queue,
3683                               struct qeth_qdio_out_buffer *buffer,
3684                               struct sk_buff *curr_skb,
3685                               struct qeth_hdr *curr_hdr)
3686 {
3687         struct qeth_hdr *prev_hdr = queue->prev_hdr;
3688
3689         if (!prev_hdr)
3690                 return true;
3691
3692         /* All packets must have the same target: */
3693         if (curr_hdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER2) {
3694                 struct sk_buff *prev_skb = skb_peek(&buffer->skb_list);
3695
3696                 return ether_addr_equal(eth_hdr(prev_skb)->h_dest,
3697                                         eth_hdr(curr_skb)->h_dest) &&
3698                        qeth_l2_same_vlan(&prev_hdr->hdr.l2, &curr_hdr->hdr.l2);
3699         }
3700
3701         return qeth_l3_same_next_hop(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3) &&
3702                qeth_l3_iqd_same_vlan(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3);
3703 }
3704
3705 static unsigned int __qeth_fill_buffer(struct sk_buff *skb,
3706                                        struct qeth_qdio_out_buffer *buf,
3707                                        bool is_first_elem, unsigned int offset)
3708 {
3709         struct qdio_buffer *buffer = buf->buffer;
3710         int element = buf->next_element_to_fill;
3711         int length = skb_headlen(skb) - offset;
3712         char *data = skb->data + offset;
3713         unsigned int elem_length, cnt;
3714
3715         /* map linear part into buffer element(s) */
3716         while (length > 0) {
3717                 elem_length = min_t(unsigned int, length,
3718                                     PAGE_SIZE - offset_in_page(data));
3719
3720                 buffer->element[element].addr = data;
3721                 buffer->element[element].length = elem_length;
3722                 length -= elem_length;
3723                 if (is_first_elem) {
3724                         is_first_elem = false;
3725                         if (length || skb_is_nonlinear(skb))
3726                                 /* skb needs additional elements */
3727                                 buffer->element[element].eflags =
3728                                         SBAL_EFLAGS_FIRST_FRAG;
3729                         else
3730                                 buffer->element[element].eflags = 0;
3731                 } else {
3732                         buffer->element[element].eflags =
3733                                 SBAL_EFLAGS_MIDDLE_FRAG;
3734                 }
3735
3736                 data += elem_length;
3737                 element++;
3738         }
3739
3740         /* map page frags into buffer element(s) */
3741         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3742                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
3743
3744                 data = skb_frag_address(frag);
3745                 length = skb_frag_size(frag);
3746                 while (length > 0) {
3747                         elem_length = min_t(unsigned int, length,
3748                                             PAGE_SIZE - offset_in_page(data));
3749
3750                         buffer->element[element].addr = data;
3751                         buffer->element[element].length = elem_length;
3752                         buffer->element[element].eflags =
3753                                 SBAL_EFLAGS_MIDDLE_FRAG;
3754
3755                         length -= elem_length;
3756                         data += elem_length;
3757                         element++;
3758                 }
3759         }
3760
3761         if (buffer->element[element - 1].eflags)
3762                 buffer->element[element - 1].eflags = SBAL_EFLAGS_LAST_FRAG;
3763         buf->next_element_to_fill = element;
3764         return element;
3765 }
3766
3767 /**
3768  * qeth_fill_buffer() - map skb into an output buffer
3769  * @buf:        buffer to transport the skb
3770  * @skb:        skb to map into the buffer
3771  * @hdr:        qeth_hdr for this skb. Either at skb->data, or allocated
3772  *              from qeth_core_header_cache.
3773  * @offset:     when mapping the skb, start at skb->data + offset
3774  * @hd_len:     if > 0, build a dedicated header element of this size
3775  */
3776 static unsigned int qeth_fill_buffer(struct qeth_qdio_out_buffer *buf,
3777                                      struct sk_buff *skb, struct qeth_hdr *hdr,
3778                                      unsigned int offset, unsigned int hd_len)
3779 {
3780         struct qdio_buffer *buffer = buf->buffer;
3781         bool is_first_elem = true;
3782
3783         __skb_queue_tail(&buf->skb_list, skb);
3784
3785         /* build dedicated header element */
3786         if (hd_len) {
3787                 int element = buf->next_element_to_fill;
3788                 is_first_elem = false;
3789
3790                 buffer->element[element].addr = hdr;
3791                 buffer->element[element].length = hd_len;
3792                 buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
3793                 /* remember to free cache-allocated qeth_hdr: */
3794                 buf->is_header[element] = ((void *)hdr != skb->data);
3795                 buf->next_element_to_fill++;
3796         }
3797
3798         return __qeth_fill_buffer(skb, buf, is_first_elem, offset);
3799 }
3800
3801 static int __qeth_xmit(struct qeth_card *card, struct qeth_qdio_out_q *queue,
3802                        struct sk_buff *skb, unsigned int elements,
3803                        struct qeth_hdr *hdr, unsigned int offset,
3804                        unsigned int hd_len)
3805 {
3806         struct qeth_qdio_out_buffer *buffer = queue->bufs[queue->bulk_start];
3807         unsigned int bytes = qdisc_pkt_len(skb);
3808         unsigned int next_element;
3809         struct netdev_queue *txq;
3810         bool stopped = false;
3811         bool flush;
3812
3813         txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
3814
3815         /* Just a sanity check, the wake/stop logic should ensure that we always
3816          * get a free buffer.
3817          */
3818         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
3819                 return -EBUSY;
3820
3821         if ((buffer->next_element_to_fill + elements > queue->max_elements) ||
3822             !qeth_iqd_may_bulk(queue, buffer, skb, hdr)) {
3823                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3824                 qeth_flush_queue(queue);
3825                 buffer = queue->bufs[queue->bulk_start];
3826
3827                 /* Sanity-check again: */
3828                 if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
3829                         return -EBUSY;
3830         }
3831
3832         if (buffer->next_element_to_fill == 0 &&
3833             atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
3834                 /* If a TX completion happens right _here_ and misses to wake
3835                  * the txq, then our re-check below will catch the race.
3836                  */
3837                 QETH_TXQ_STAT_INC(queue, stopped);
3838                 netif_tx_stop_queue(txq);
3839                 stopped = true;
3840         }
3841
3842         next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
3843         buffer->bytes += bytes;
3844         queue->prev_hdr = hdr;
3845
3846         flush = __netdev_tx_sent_queue(txq, bytes,
3847                                        !stopped && netdev_xmit_more());
3848
3849         if (flush || next_element >= queue->max_elements) {
3850                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3851                 qeth_flush_queue(queue);
3852         }
3853
3854         if (stopped && !qeth_out_queue_is_full(queue))
3855                 netif_tx_start_queue(txq);
3856         return 0;
3857 }
3858
3859 int qeth_do_send_packet(struct qeth_card *card, struct qeth_qdio_out_q *queue,
3860                         struct sk_buff *skb, struct qeth_hdr *hdr,
3861                         unsigned int offset, unsigned int hd_len,
3862                         int elements_needed)
3863 {
3864         struct qeth_qdio_out_buffer *buffer;
3865         unsigned int next_element;
3866         struct netdev_queue *txq;
3867         bool stopped = false;
3868         int start_index;
3869         int flush_count = 0;
3870         int do_pack = 0;
3871         int tmp;
3872         int rc = 0;
3873
3874         /* spin until we get the queue ... */
3875         while (atomic_cmpxchg(&queue->state, QETH_OUT_Q_UNLOCKED,
3876                               QETH_OUT_Q_LOCKED) != QETH_OUT_Q_UNLOCKED);
3877         start_index = queue->next_buf_to_fill;
3878         buffer = queue->bufs[queue->next_buf_to_fill];
3879
3880         /* Just a sanity check, the wake/stop logic should ensure that we always
3881          * get a free buffer.
3882          */
3883         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY) {
3884                 atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
3885                 return -EBUSY;
3886         }
3887
3888         txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
3889
3890         /* check if we need to switch packing state of this queue */
3891         qeth_switch_to_packing_if_needed(queue);
3892         if (queue->do_pack) {
3893                 do_pack = 1;
3894                 /* does packet fit in current buffer? */
3895                 if (buffer->next_element_to_fill + elements_needed >
3896                     queue->max_elements) {
3897                         /* ... no -> set state PRIMED */
3898                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3899                         flush_count++;
3900                         queue->next_buf_to_fill =
3901                                 (queue->next_buf_to_fill + 1) %
3902                                 QDIO_MAX_BUFFERS_PER_Q;
3903                         buffer = queue->bufs[queue->next_buf_to_fill];
3904
3905                         /* We stepped forward, so sanity-check again: */
3906                         if (atomic_read(&buffer->state) !=
3907                             QETH_QDIO_BUF_EMPTY) {
3908                                 qeth_flush_buffers(queue, start_index,
3909                                                            flush_count);
3910                                 atomic_set(&queue->state,
3911                                                 QETH_OUT_Q_UNLOCKED);
3912                                 rc = -EBUSY;
3913                                 goto out;
3914                         }
3915                 }
3916         }
3917
3918         if (buffer->next_element_to_fill == 0 &&
3919             atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
3920                 /* If a TX completion happens right _here_ and misses to wake
3921                  * the txq, then our re-check below will catch the race.
3922                  */
3923                 QETH_TXQ_STAT_INC(queue, stopped);
3924                 netif_tx_stop_queue(txq);
3925                 stopped = true;
3926         }
3927
3928         next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
3929
3930         if (queue->do_pack)
3931                 QETH_TXQ_STAT_INC(queue, skbs_pack);
3932         if (!queue->do_pack || stopped || next_element >= queue->max_elements) {
3933                 flush_count++;
3934                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3935                 queue->next_buf_to_fill = (queue->next_buf_to_fill + 1) %
3936                                           QDIO_MAX_BUFFERS_PER_Q;
3937         }
3938
3939         if (flush_count)
3940                 qeth_flush_buffers(queue, start_index, flush_count);
3941         else if (!atomic_read(&queue->set_pci_flags_count))
3942                 atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH);
3943         /*
3944          * queue->state will go from LOCKED -> UNLOCKED or from
3945          * LOCKED_FLUSH -> LOCKED if output_handler wanted to 'notify' us
3946          * (switch packing state or flush buffer to get another pci flag out).
3947          * In that case we will enter this loop
3948          */
3949         while (atomic_dec_return(&queue->state)) {
3950                 start_index = queue->next_buf_to_fill;
3951                 /* check if we can go back to non-packing state */
3952                 tmp = qeth_switch_to_nonpacking_if_needed(queue);
3953                 /*
3954                  * check if we need to flush a packing buffer to get a pci
3955                  * flag out on the queue
3956                  */
3957                 if (!tmp && !atomic_read(&queue->set_pci_flags_count))
3958                         tmp = qeth_prep_flush_pack_buffer(queue);
3959                 if (tmp) {
3960                         qeth_flush_buffers(queue, start_index, tmp);
3961                         flush_count += tmp;
3962                 }
3963         }
3964 out:
3965         /* at this point the queue is UNLOCKED again */
3966         if (do_pack)
3967                 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_count);
3968
3969         if (stopped && !qeth_out_queue_is_full(queue))
3970                 netif_tx_start_queue(txq);
3971         return rc;
3972 }
3973 EXPORT_SYMBOL_GPL(qeth_do_send_packet);
3974
3975 static void qeth_fill_tso_ext(struct qeth_hdr_tso *hdr,
3976                               unsigned int payload_len, struct sk_buff *skb,
3977                               unsigned int proto_len)
3978 {
3979         struct qeth_hdr_ext_tso *ext = &hdr->ext;
3980
3981         ext->hdr_tot_len = sizeof(*ext);
3982         ext->imb_hdr_no = 1;
3983         ext->hdr_type = 1;
3984         ext->hdr_version = 1;
3985         ext->hdr_len = 28;
3986         ext->payload_len = payload_len;
3987         ext->mss = skb_shinfo(skb)->gso_size;
3988         ext->dg_hdr_len = proto_len;
3989 }
3990
3991 int qeth_xmit(struct qeth_card *card, struct sk_buff *skb,
3992               struct qeth_qdio_out_q *queue, int ipv,
3993               void (*fill_header)(struct qeth_qdio_out_q *queue,
3994                                   struct qeth_hdr *hdr, struct sk_buff *skb,
3995                                   int ipv, unsigned int data_len))
3996 {
3997         unsigned int proto_len, hw_hdr_len;
3998         unsigned int frame_len = skb->len;
3999         bool is_tso = skb_is_gso(skb);
4000         unsigned int data_offset = 0;
4001         struct qeth_hdr *hdr = NULL;
4002         unsigned int hd_len = 0;
4003         unsigned int elements;
4004         int push_len, rc;
4005
4006         if (is_tso) {
4007                 hw_hdr_len = sizeof(struct qeth_hdr_tso);
4008                 proto_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
4009         } else {
4010                 hw_hdr_len = sizeof(struct qeth_hdr);
4011                 proto_len = (IS_IQD(card) && IS_LAYER2(card)) ? ETH_HLEN : 0;
4012         }
4013
4014         rc = skb_cow_head(skb, hw_hdr_len);
4015         if (rc)
4016                 return rc;
4017
4018         push_len = qeth_add_hw_header(queue, skb, &hdr, hw_hdr_len, proto_len,
4019                                       &elements);
4020         if (push_len < 0)
4021                 return push_len;
4022         if (is_tso || !push_len) {
4023                 /* HW header needs its own buffer element. */
4024                 hd_len = hw_hdr_len + proto_len;
4025                 data_offset = push_len + proto_len;
4026         }
4027         memset(hdr, 0, hw_hdr_len);
4028         fill_header(queue, hdr, skb, ipv, frame_len);
4029         if (is_tso)
4030                 qeth_fill_tso_ext((struct qeth_hdr_tso *) hdr,
4031                                   frame_len - proto_len, skb, proto_len);
4032
4033         if (IS_IQD(card)) {
4034                 rc = __qeth_xmit(card, queue, skb, elements, hdr, data_offset,
4035                                  hd_len);
4036         } else {
4037                 /* TODO: drop skb_orphan() once TX completion is fast enough */
4038                 skb_orphan(skb);
4039                 rc = qeth_do_send_packet(card, queue, skb, hdr, data_offset,
4040                                          hd_len, elements);
4041         }
4042
4043         if (rc && !push_len)
4044                 kmem_cache_free(qeth_core_header_cache, hdr);
4045
4046         return rc;
4047 }
4048 EXPORT_SYMBOL_GPL(qeth_xmit);
4049
4050 static int qeth_setadp_promisc_mode_cb(struct qeth_card *card,
4051                 struct qeth_reply *reply, unsigned long data)
4052 {
4053         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4054         struct qeth_ipacmd_setadpparms *setparms;
4055
4056         QETH_CARD_TEXT(card, 4, "prmadpcb");
4057
4058         setparms = &(cmd->data.setadapterparms);
4059         if (qeth_setadpparms_inspect_rc(cmd)) {
4060                 QETH_CARD_TEXT_(card, 4, "prmrc%x", cmd->hdr.return_code);
4061                 setparms->data.mode = SET_PROMISC_MODE_OFF;
4062         }
4063         card->info.promisc_mode = setparms->data.mode;
4064         return (cmd->hdr.return_code) ? -EIO : 0;
4065 }
4066
4067 void qeth_setadp_promisc_mode(struct qeth_card *card, bool enable)
4068 {
4069         enum qeth_ipa_promisc_modes mode = enable ? SET_PROMISC_MODE_ON :
4070                                                     SET_PROMISC_MODE_OFF;
4071         struct qeth_cmd_buffer *iob;
4072         struct qeth_ipa_cmd *cmd;
4073
4074         QETH_CARD_TEXT(card, 4, "setprom");
4075         QETH_CARD_TEXT_(card, 4, "mode:%x", mode);
4076
4077         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE,
4078                                    SETADP_DATA_SIZEOF(mode));
4079         if (!iob)
4080                 return;
4081         cmd = __ipa_cmd(iob);
4082         cmd->data.setadapterparms.data.mode = mode;
4083         qeth_send_ipa_cmd(card, iob, qeth_setadp_promisc_mode_cb, NULL);
4084 }
4085 EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode);
4086
4087 static int qeth_setadpparms_change_macaddr_cb(struct qeth_card *card,
4088                 struct qeth_reply *reply, unsigned long data)
4089 {
4090         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4091         struct qeth_ipacmd_setadpparms *adp_cmd;
4092
4093         QETH_CARD_TEXT(card, 4, "chgmaccb");
4094         if (qeth_setadpparms_inspect_rc(cmd))
4095                 return -EIO;
4096
4097         adp_cmd = &cmd->data.setadapterparms;
4098         if (!is_valid_ether_addr(adp_cmd->data.change_addr.addr))
4099                 return -EADDRNOTAVAIL;
4100
4101         if (IS_LAYER2(card) && IS_OSD(card) && !IS_VM_NIC(card) &&
4102             !(adp_cmd->hdr.flags & QETH_SETADP_FLAGS_VIRTUAL_MAC))
4103                 return -EADDRNOTAVAIL;
4104
4105         ether_addr_copy(card->dev->dev_addr, adp_cmd->data.change_addr.addr);
4106         return 0;
4107 }
4108
4109 int qeth_setadpparms_change_macaddr(struct qeth_card *card)
4110 {
4111         int rc;
4112         struct qeth_cmd_buffer *iob;
4113         struct qeth_ipa_cmd *cmd;
4114
4115         QETH_CARD_TEXT(card, 4, "chgmac");
4116
4117         iob = qeth_get_adapter_cmd(card, IPA_SETADP_ALTER_MAC_ADDRESS,
4118                                    SETADP_DATA_SIZEOF(change_addr));
4119         if (!iob)
4120                 return -ENOMEM;
4121         cmd = __ipa_cmd(iob);
4122         cmd->data.setadapterparms.data.change_addr.cmd = CHANGE_ADDR_READ_MAC;
4123         cmd->data.setadapterparms.data.change_addr.addr_size = ETH_ALEN;
4124         ether_addr_copy(cmd->data.setadapterparms.data.change_addr.addr,
4125                         card->dev->dev_addr);
4126         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_change_macaddr_cb,
4127                                NULL);
4128         return rc;
4129 }
4130 EXPORT_SYMBOL_GPL(qeth_setadpparms_change_macaddr);
4131
4132 static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card,
4133                 struct qeth_reply *reply, unsigned long data)
4134 {
4135         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4136         struct qeth_set_access_ctrl *access_ctrl_req;
4137         int fallback = *(int *)reply->param;
4138
4139         QETH_CARD_TEXT(card, 4, "setaccb");
4140         if (cmd->hdr.return_code)
4141                 return -EIO;
4142         qeth_setadpparms_inspect_rc(cmd);
4143
4144         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4145         QETH_CARD_TEXT_(card, 2, "rc=%d",
4146                         cmd->data.setadapterparms.hdr.return_code);
4147         if (cmd->data.setadapterparms.hdr.return_code !=
4148                                                 SET_ACCESS_CTRL_RC_SUCCESS)
4149                 QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%#x) on device %x: %#x\n",
4150                                  access_ctrl_req->subcmd_code, CARD_DEVID(card),
4151                                  cmd->data.setadapterparms.hdr.return_code);
4152         switch (cmd->data.setadapterparms.hdr.return_code) {
4153         case SET_ACCESS_CTRL_RC_SUCCESS:
4154                 if (card->options.isolation == ISOLATION_MODE_NONE) {
4155                         dev_info(&card->gdev->dev,
4156                             "QDIO data connection isolation is deactivated\n");
4157                 } else {
4158                         dev_info(&card->gdev->dev,
4159                             "QDIO data connection isolation is activated\n");
4160                 }
4161                 break;
4162         case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
4163                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already deactivated\n",
4164                                  CARD_DEVID(card));
4165                 if (fallback)
4166                         card->options.isolation = card->options.prev_isolation;
4167                 break;
4168         case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
4169                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already activated\n",
4170                                  CARD_DEVID(card));
4171                 if (fallback)
4172                         card->options.isolation = card->options.prev_isolation;
4173                 break;
4174         case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
4175                 dev_err(&card->gdev->dev, "Adapter does not "
4176                         "support QDIO data connection isolation\n");
4177                 break;
4178         case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
4179                 dev_err(&card->gdev->dev,
4180                         "Adapter is dedicated. "
4181                         "QDIO data connection isolation not supported\n");
4182                 if (fallback)
4183                         card->options.isolation = card->options.prev_isolation;
4184                 break;
4185         case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
4186                 dev_err(&card->gdev->dev,
4187                         "TSO does not permit QDIO data connection isolation\n");
4188                 if (fallback)
4189                         card->options.isolation = card->options.prev_isolation;
4190                 break;
4191         case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED:
4192                 dev_err(&card->gdev->dev, "The adjacent switch port does not "
4193                         "support reflective relay mode\n");
4194                 if (fallback)
4195                         card->options.isolation = card->options.prev_isolation;
4196                 break;
4197         case SET_ACCESS_CTRL_RC_REFLREL_FAILED:
4198                 dev_err(&card->gdev->dev, "The reflective relay mode cannot be "
4199                                         "enabled at the adjacent switch port");
4200                 if (fallback)
4201                         card->options.isolation = card->options.prev_isolation;
4202                 break;
4203         case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED:
4204                 dev_warn(&card->gdev->dev, "Turning off reflective relay mode "
4205                                         "at the adjacent switch failed\n");
4206                 break;
4207         default:
4208                 /* this should never happen */
4209                 if (fallback)
4210                         card->options.isolation = card->options.prev_isolation;
4211                 break;
4212         }
4213         return (cmd->hdr.return_code) ? -EIO : 0;
4214 }
4215
4216 static int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
4217                 enum qeth_ipa_isolation_modes isolation, int fallback)
4218 {
4219         int rc;
4220         struct qeth_cmd_buffer *iob;
4221         struct qeth_ipa_cmd *cmd;
4222         struct qeth_set_access_ctrl *access_ctrl_req;
4223
4224         QETH_CARD_TEXT(card, 4, "setacctl");
4225
4226         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL,
4227                                    SETADP_DATA_SIZEOF(set_access_ctrl));
4228         if (!iob)
4229                 return -ENOMEM;
4230         cmd = __ipa_cmd(iob);
4231         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4232         access_ctrl_req->subcmd_code = isolation;
4233
4234         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb,
4235                                &fallback);
4236         QETH_CARD_TEXT_(card, 2, "rc=%d", rc);
4237         return rc;
4238 }
4239
4240 int qeth_set_access_ctrl_online(struct qeth_card *card, int fallback)
4241 {
4242         int rc = 0;
4243
4244         QETH_CARD_TEXT(card, 4, "setactlo");
4245
4246         if ((IS_OSD(card) || IS_OSX(card)) &&
4247             qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) {
4248                 rc = qeth_setadpparms_set_access_ctrl(card,
4249                         card->options.isolation, fallback);
4250                 if (rc) {
4251                         QETH_DBF_MESSAGE(3, "IPA(SET_ACCESS_CTRL(%d) on device %x: sent failed\n",
4252                                          rc, CARD_DEVID(card));
4253                         rc = -EOPNOTSUPP;
4254                 }
4255         } else if (card->options.isolation != ISOLATION_MODE_NONE) {
4256                 card->options.isolation = ISOLATION_MODE_NONE;
4257
4258                 dev_err(&card->gdev->dev, "Adapter does not "
4259                         "support QDIO data connection isolation\n");
4260                 rc = -EOPNOTSUPP;
4261         }
4262         return rc;
4263 }
4264 EXPORT_SYMBOL_GPL(qeth_set_access_ctrl_online);
4265
4266 void qeth_tx_timeout(struct net_device *dev)
4267 {
4268         struct qeth_card *card;
4269
4270         card = dev->ml_priv;
4271         QETH_CARD_TEXT(card, 4, "txtimeo");
4272         qeth_schedule_recovery(card);
4273 }
4274 EXPORT_SYMBOL_GPL(qeth_tx_timeout);
4275
4276 static int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum)
4277 {
4278         struct qeth_card *card = dev->ml_priv;
4279         int rc = 0;
4280
4281         switch (regnum) {
4282         case MII_BMCR: /* Basic mode control register */
4283                 rc = BMCR_FULLDPLX;
4284                 if ((card->info.link_type != QETH_LINK_TYPE_GBIT_ETH) &&
4285                     (card->info.link_type != QETH_LINK_TYPE_OSN) &&
4286                     (card->info.link_type != QETH_LINK_TYPE_10GBIT_ETH) &&
4287                     (card->info.link_type != QETH_LINK_TYPE_25GBIT_ETH))
4288                         rc |= BMCR_SPEED100;
4289                 break;
4290         case MII_BMSR: /* Basic mode status register */
4291                 rc = BMSR_ERCAP | BMSR_ANEGCOMPLETE | BMSR_LSTATUS |
4292                      BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | BMSR_100FULL |
4293                      BMSR_100BASE4;
4294                 break;
4295         case MII_PHYSID1: /* PHYS ID 1 */
4296                 rc = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 8) |
4297                      dev->dev_addr[2];
4298                 rc = (rc >> 5) & 0xFFFF;
4299                 break;
4300         case MII_PHYSID2: /* PHYS ID 2 */
4301                 rc = (dev->dev_addr[2] << 10) & 0xFFFF;
4302                 break;
4303         case MII_ADVERTISE: /* Advertisement control reg */
4304                 rc = ADVERTISE_ALL;
4305                 break;
4306         case MII_LPA: /* Link partner ability reg */
4307                 rc = LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL |
4308                      LPA_100BASE4 | LPA_LPACK;
4309                 break;
4310         case MII_EXPANSION: /* Expansion register */
4311                 break;
4312         case MII_DCOUNTER: /* disconnect counter */
4313                 break;
4314         case MII_FCSCOUNTER: /* false carrier counter */
4315                 break;
4316         case MII_NWAYTEST: /* N-way auto-neg test register */
4317                 break;
4318         case MII_RERRCOUNTER: /* rx error counter */
4319                 rc = card->stats.rx_errors;
4320                 break;
4321         case MII_SREVISION: /* silicon revision */
4322                 break;
4323         case MII_RESV1: /* reserved 1 */
4324                 break;
4325         case MII_LBRERROR: /* loopback, rx, bypass error */
4326                 break;
4327         case MII_PHYADDR: /* physical address */
4328                 break;
4329         case MII_RESV2: /* reserved 2 */
4330                 break;
4331         case MII_TPISTATUS: /* TPI status for 10mbps */
4332                 break;
4333         case MII_NCONFIG: /* network interface config */
4334                 break;
4335         default:
4336                 break;
4337         }
4338         return rc;
4339 }
4340
4341 static int qeth_snmp_command_cb(struct qeth_card *card,
4342                                 struct qeth_reply *reply, unsigned long data)
4343 {
4344         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4345         struct qeth_arp_query_info *qinfo = reply->param;
4346         struct qeth_ipacmd_setadpparms *adp_cmd;
4347         unsigned int data_len;
4348         void *snmp_data;
4349
4350         QETH_CARD_TEXT(card, 3, "snpcmdcb");
4351
4352         if (cmd->hdr.return_code) {
4353                 QETH_CARD_TEXT_(card, 4, "scer1%x", cmd->hdr.return_code);
4354                 return -EIO;
4355         }
4356         if (cmd->data.setadapterparms.hdr.return_code) {
4357                 cmd->hdr.return_code =
4358                         cmd->data.setadapterparms.hdr.return_code;
4359                 QETH_CARD_TEXT_(card, 4, "scer2%x", cmd->hdr.return_code);
4360                 return -EIO;
4361         }
4362
4363         adp_cmd = &cmd->data.setadapterparms;
4364         data_len = adp_cmd->hdr.cmdlength - sizeof(adp_cmd->hdr);
4365         if (adp_cmd->hdr.seq_no == 1) {
4366                 snmp_data = &adp_cmd->data.snmp;
4367         } else {
4368                 snmp_data = &adp_cmd->data.snmp.request;
4369                 data_len -= offsetof(struct qeth_snmp_cmd, request);
4370         }
4371
4372         /* check if there is enough room in userspace */
4373         if ((qinfo->udata_len - qinfo->udata_offset) < data_len) {
4374                 QETH_CARD_TEXT_(card, 4, "scer3%i", -ENOSPC);
4375                 return -ENOSPC;
4376         }
4377         QETH_CARD_TEXT_(card, 4, "snore%i",
4378                         cmd->data.setadapterparms.hdr.used_total);
4379         QETH_CARD_TEXT_(card, 4, "sseqn%i",
4380                         cmd->data.setadapterparms.hdr.seq_no);
4381         /*copy entries to user buffer*/
4382         memcpy(qinfo->udata + qinfo->udata_offset, snmp_data, data_len);
4383         qinfo->udata_offset += data_len;
4384
4385         if (cmd->data.setadapterparms.hdr.seq_no <
4386             cmd->data.setadapterparms.hdr.used_total)
4387                 return 1;
4388         return 0;
4389 }
4390
4391 static int qeth_snmp_command(struct qeth_card *card, char __user *udata)
4392 {
4393         struct qeth_snmp_ureq __user *ureq;
4394         struct qeth_cmd_buffer *iob;
4395         unsigned int req_len;
4396         struct qeth_arp_query_info qinfo = {0, };
4397         int rc = 0;
4398
4399         QETH_CARD_TEXT(card, 3, "snmpcmd");
4400
4401         if (IS_VM_NIC(card))
4402                 return -EOPNOTSUPP;
4403
4404         if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) &&
4405             IS_LAYER3(card))
4406                 return -EOPNOTSUPP;
4407
4408         ureq = (struct qeth_snmp_ureq __user *) udata;
4409         if (get_user(qinfo.udata_len, &ureq->hdr.data_len) ||
4410             get_user(req_len, &ureq->hdr.req_len))
4411                 return -EFAULT;
4412
4413         /* Sanitize user input, to avoid overflows in iob size calculation: */
4414         if (req_len > QETH_BUFSIZE)
4415                 return -EINVAL;
4416
4417         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL, req_len);
4418         if (!iob)
4419                 return -ENOMEM;
4420
4421         if (copy_from_user(&__ipa_cmd(iob)->data.setadapterparms.data.snmp,
4422                            &ureq->cmd, req_len)) {
4423                 qeth_put_cmd(iob);
4424                 return -EFAULT;
4425         }
4426
4427         qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
4428         if (!qinfo.udata) {
4429                 qeth_put_cmd(iob);
4430                 return -ENOMEM;
4431         }
4432         qinfo.udata_offset = sizeof(struct qeth_snmp_ureq_hdr);
4433
4434         rc = qeth_send_ipa_cmd(card, iob, qeth_snmp_command_cb, &qinfo);
4435         if (rc)
4436                 QETH_DBF_MESSAGE(2, "SNMP command failed on device %x: (%#x)\n",
4437                                  CARD_DEVID(card), rc);
4438         else {
4439                 if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
4440                         rc = -EFAULT;
4441         }
4442
4443         kfree(qinfo.udata);
4444         return rc;
4445 }
4446
4447 static int qeth_setadpparms_query_oat_cb(struct qeth_card *card,
4448                 struct qeth_reply *reply, unsigned long data)
4449 {
4450         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4451         struct qeth_qoat_priv *priv;
4452         char *resdata;
4453         int resdatalen;
4454
4455         QETH_CARD_TEXT(card, 3, "qoatcb");
4456         if (qeth_setadpparms_inspect_rc(cmd))
4457                 return -EIO;
4458
4459         priv = (struct qeth_qoat_priv *)reply->param;
4460         resdatalen = cmd->data.setadapterparms.hdr.cmdlength;
4461         resdata = (char *)data + 28;
4462
4463         if (resdatalen > (priv->buffer_len - priv->response_len))
4464                 return -ENOSPC;
4465
4466         memcpy((priv->buffer + priv->response_len), resdata,
4467                 resdatalen);
4468         priv->response_len += resdatalen;
4469
4470         if (cmd->data.setadapterparms.hdr.seq_no <
4471             cmd->data.setadapterparms.hdr.used_total)
4472                 return 1;
4473         return 0;
4474 }
4475
4476 static int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
4477 {
4478         int rc = 0;
4479         struct qeth_cmd_buffer *iob;
4480         struct qeth_ipa_cmd *cmd;
4481         struct qeth_query_oat *oat_req;
4482         struct qeth_query_oat_data oat_data;
4483         struct qeth_qoat_priv priv;
4484         void __user *tmp;
4485
4486         QETH_CARD_TEXT(card, 3, "qoatcmd");
4487
4488         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT)) {
4489                 rc = -EOPNOTSUPP;
4490                 goto out;
4491         }
4492
4493         if (copy_from_user(&oat_data, udata,
4494             sizeof(struct qeth_query_oat_data))) {
4495                         rc = -EFAULT;
4496                         goto out;
4497         }
4498
4499         priv.buffer_len = oat_data.buffer_len;
4500         priv.response_len = 0;
4501         priv.buffer = vzalloc(oat_data.buffer_len);
4502         if (!priv.buffer) {
4503                 rc = -ENOMEM;
4504                 goto out;
4505         }
4506
4507         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4508                                    SETADP_DATA_SIZEOF(query_oat));
4509         if (!iob) {
4510                 rc = -ENOMEM;
4511                 goto out_free;
4512         }
4513         cmd = __ipa_cmd(iob);
4514         oat_req = &cmd->data.setadapterparms.data.query_oat;
4515         oat_req->subcmd_code = oat_data.command;
4516
4517         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb,
4518                                &priv);
4519         if (!rc) {
4520                 if (is_compat_task())
4521                         tmp = compat_ptr(oat_data.ptr);
4522                 else
4523                         tmp = (void __user *)(unsigned long)oat_data.ptr;
4524
4525                 if (copy_to_user(tmp, priv.buffer,
4526                     priv.response_len)) {
4527                         rc = -EFAULT;
4528                         goto out_free;
4529                 }
4530
4531                 oat_data.response_len = priv.response_len;
4532
4533                 if (copy_to_user(udata, &oat_data,
4534                     sizeof(struct qeth_query_oat_data)))
4535                         rc = -EFAULT;
4536         }
4537
4538 out_free:
4539         vfree(priv.buffer);
4540 out:
4541         return rc;
4542 }
4543
4544 static int qeth_query_card_info_cb(struct qeth_card *card,
4545                                    struct qeth_reply *reply, unsigned long data)
4546 {
4547         struct carrier_info *carrier_info = (struct carrier_info *)reply->param;
4548         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4549         struct qeth_query_card_info *card_info;
4550
4551         QETH_CARD_TEXT(card, 2, "qcrdincb");
4552         if (qeth_setadpparms_inspect_rc(cmd))
4553                 return -EIO;
4554
4555         card_info = &cmd->data.setadapterparms.data.card_info;
4556         carrier_info->card_type = card_info->card_type;
4557         carrier_info->port_mode = card_info->port_mode;
4558         carrier_info->port_speed = card_info->port_speed;
4559         return 0;
4560 }
4561
4562 int qeth_query_card_info(struct qeth_card *card,
4563                          struct carrier_info *carrier_info)
4564 {
4565         struct qeth_cmd_buffer *iob;
4566
4567         QETH_CARD_TEXT(card, 2, "qcrdinfo");
4568         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_CARD_INFO))
4569                 return -EOPNOTSUPP;
4570         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_CARD_INFO, 0);
4571         if (!iob)
4572                 return -ENOMEM;
4573         return qeth_send_ipa_cmd(card, iob, qeth_query_card_info_cb,
4574                                         (void *)carrier_info);
4575 }
4576
4577 /**
4578  * qeth_vm_request_mac() - Request a hypervisor-managed MAC address
4579  * @card: pointer to a qeth_card
4580  *
4581  * Returns
4582  *      0, if a MAC address has been set for the card's netdevice
4583  *      a return code, for various error conditions
4584  */
4585 int qeth_vm_request_mac(struct qeth_card *card)
4586 {
4587         struct diag26c_mac_resp *response;
4588         struct diag26c_mac_req *request;
4589         struct ccw_dev_id id;
4590         int rc;
4591
4592         QETH_CARD_TEXT(card, 2, "vmreqmac");
4593
4594         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
4595         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
4596         if (!request || !response) {
4597                 rc = -ENOMEM;
4598                 goto out;
4599         }
4600
4601         ccw_device_get_id(CARD_DDEV(card), &id);
4602         request->resp_buf_len = sizeof(*response);
4603         request->resp_version = DIAG26C_VERSION2;
4604         request->op_code = DIAG26C_GET_MAC;
4605         request->devno = id.devno;
4606
4607         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4608         rc = diag26c(request, response, DIAG26C_MAC_SERVICES);
4609         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4610         if (rc)
4611                 goto out;
4612         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
4613
4614         if (request->resp_buf_len < sizeof(*response) ||
4615             response->version != request->resp_version) {
4616                 rc = -EIO;
4617                 QETH_CARD_TEXT(card, 2, "badresp");
4618                 QETH_CARD_HEX(card, 2, &request->resp_buf_len,
4619                               sizeof(request->resp_buf_len));
4620         } else if (!is_valid_ether_addr(response->mac)) {
4621                 rc = -EINVAL;
4622                 QETH_CARD_TEXT(card, 2, "badmac");
4623                 QETH_CARD_HEX(card, 2, response->mac, ETH_ALEN);
4624         } else {
4625                 ether_addr_copy(card->dev->dev_addr, response->mac);
4626         }
4627
4628 out:
4629         kfree(response);
4630         kfree(request);
4631         return rc;
4632 }
4633 EXPORT_SYMBOL_GPL(qeth_vm_request_mac);
4634
4635 static void qeth_determine_capabilities(struct qeth_card *card)
4636 {
4637         int rc;
4638         struct ccw_device *ddev;
4639         int ddev_offline = 0;
4640
4641         QETH_CARD_TEXT(card, 2, "detcapab");
4642         ddev = CARD_DDEV(card);
4643         if (!ddev->online) {
4644                 ddev_offline = 1;
4645                 rc = ccw_device_set_online(ddev);
4646                 if (rc) {
4647                         QETH_CARD_TEXT_(card, 2, "3err%d", rc);
4648                         goto out;
4649                 }
4650         }
4651
4652         rc = qeth_read_conf_data(card);
4653         if (rc) {
4654                 QETH_DBF_MESSAGE(2, "qeth_read_conf_data on device %x returned %i\n",
4655                                  CARD_DEVID(card), rc);
4656                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
4657                 goto out_offline;
4658         }
4659
4660         rc = qdio_get_ssqd_desc(ddev, &card->ssqd);
4661         if (rc)
4662                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
4663
4664         QETH_CARD_TEXT_(card, 2, "qfmt%d", card->ssqd.qfmt);
4665         QETH_CARD_TEXT_(card, 2, "ac1:%02x", card->ssqd.qdioac1);
4666         QETH_CARD_TEXT_(card, 2, "ac2:%04x", card->ssqd.qdioac2);
4667         QETH_CARD_TEXT_(card, 2, "ac3:%04x", card->ssqd.qdioac3);
4668         QETH_CARD_TEXT_(card, 2, "icnt%d", card->ssqd.icnt);
4669         if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) ||
4670             ((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) ||
4671             ((card->ssqd.qdioac3 & CHSC_AC3_FORMAT2_CQ_AVAILABLE) == 0))) {
4672                 dev_info(&card->gdev->dev,
4673                         "Completion Queueing supported\n");
4674         } else {
4675                 card->options.cq = QETH_CQ_NOTAVAILABLE;
4676         }
4677
4678
4679 out_offline:
4680         if (ddev_offline == 1)
4681                 ccw_device_set_offline(ddev);
4682 out:
4683         return;
4684 }
4685
4686 static void qeth_qdio_establish_cq(struct qeth_card *card,
4687                                    struct qdio_buffer **in_sbal_ptrs,
4688                                    void (**queue_start_poll)
4689                                         (struct ccw_device *, int,
4690                                          unsigned long))
4691 {
4692         int i;
4693
4694         if (card->options.cq == QETH_CQ_ENABLED) {
4695                 int offset = QDIO_MAX_BUFFERS_PER_Q *
4696                              (card->qdio.no_in_queues - 1);
4697                 for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i) {
4698                         in_sbal_ptrs[offset + i] = (struct qdio_buffer *)
4699                                 virt_to_phys(card->qdio.c_q->bufs[i].buffer);
4700                 }
4701
4702                 queue_start_poll[card->qdio.no_in_queues - 1] = NULL;
4703         }
4704 }
4705
4706 static int qeth_qdio_establish(struct qeth_card *card)
4707 {
4708         struct qdio_initialize init_data;
4709         char *qib_param_field;
4710         struct qdio_buffer **in_sbal_ptrs;
4711         void (**queue_start_poll) (struct ccw_device *, int, unsigned long);
4712         struct qdio_buffer **out_sbal_ptrs;
4713         int i, j, k;
4714         int rc = 0;
4715
4716         QETH_CARD_TEXT(card, 2, "qdioest");
4717
4718         qib_param_field = kzalloc(QDIO_MAX_BUFFERS_PER_Q,
4719                                   GFP_KERNEL);
4720         if (!qib_param_field) {
4721                 rc =  -ENOMEM;
4722                 goto out_free_nothing;
4723         }
4724
4725         qeth_create_qib_param_field(card, qib_param_field);
4726         qeth_create_qib_param_field_blkt(card, qib_param_field);
4727
4728         in_sbal_ptrs = kcalloc(card->qdio.no_in_queues * QDIO_MAX_BUFFERS_PER_Q,
4729                                sizeof(void *),
4730                                GFP_KERNEL);
4731         if (!in_sbal_ptrs) {
4732                 rc = -ENOMEM;
4733                 goto out_free_qib_param;
4734         }
4735         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i) {
4736                 in_sbal_ptrs[i] = (struct qdio_buffer *)
4737                         virt_to_phys(card->qdio.in_q->bufs[i].buffer);
4738         }
4739
4740         queue_start_poll = kcalloc(card->qdio.no_in_queues, sizeof(void *),
4741                                    GFP_KERNEL);
4742         if (!queue_start_poll) {
4743                 rc = -ENOMEM;
4744                 goto out_free_in_sbals;
4745         }
4746         for (i = 0; i < card->qdio.no_in_queues; ++i)
4747                 queue_start_poll[i] = qeth_qdio_start_poll;
4748
4749         qeth_qdio_establish_cq(card, in_sbal_ptrs, queue_start_poll);
4750
4751         out_sbal_ptrs =
4752                 kcalloc(card->qdio.no_out_queues * QDIO_MAX_BUFFERS_PER_Q,
4753                         sizeof(void *),
4754                         GFP_KERNEL);
4755         if (!out_sbal_ptrs) {
4756                 rc = -ENOMEM;
4757                 goto out_free_queue_start_poll;
4758         }
4759         for (i = 0, k = 0; i < card->qdio.no_out_queues; ++i)
4760                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j, ++k) {
4761                         out_sbal_ptrs[k] = (struct qdio_buffer *)virt_to_phys(
4762                                 card->qdio.out_qs[i]->bufs[j]->buffer);
4763                 }
4764
4765         memset(&init_data, 0, sizeof(struct qdio_initialize));
4766         init_data.cdev                   = CARD_DDEV(card);
4767         init_data.q_format               = IS_IQD(card) ? QDIO_IQDIO_QFMT :
4768                                                           QDIO_QETH_QFMT;
4769         init_data.qib_param_field_format = 0;
4770         init_data.qib_param_field        = qib_param_field;
4771         init_data.no_input_qs            = card->qdio.no_in_queues;
4772         init_data.no_output_qs           = card->qdio.no_out_queues;
4773         init_data.input_handler          = qeth_qdio_input_handler;
4774         init_data.output_handler         = qeth_qdio_output_handler;
4775         init_data.queue_start_poll_array = queue_start_poll;
4776         init_data.int_parm               = (unsigned long) card;
4777         init_data.input_sbal_addr_array  = in_sbal_ptrs;
4778         init_data.output_sbal_addr_array = out_sbal_ptrs;
4779         init_data.output_sbal_state_array = card->qdio.out_bufstates;
4780         init_data.scan_threshold         = IS_IQD(card) ? 0 : 32;
4781
4782         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED,
4783                 QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) {
4784                 rc = qdio_allocate(&init_data);
4785                 if (rc) {
4786                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
4787                         goto out;
4788                 }
4789                 rc = qdio_establish(&init_data);
4790                 if (rc) {
4791                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
4792                         qdio_free(CARD_DDEV(card));
4793                 }
4794         }
4795
4796         switch (card->options.cq) {
4797         case QETH_CQ_ENABLED:
4798                 dev_info(&card->gdev->dev, "Completion Queue support enabled");
4799                 break;
4800         case QETH_CQ_DISABLED:
4801                 dev_info(&card->gdev->dev, "Completion Queue support disabled");
4802                 break;
4803         default:
4804                 break;
4805         }
4806 out:
4807         kfree(out_sbal_ptrs);
4808 out_free_queue_start_poll:
4809         kfree(queue_start_poll);
4810 out_free_in_sbals:
4811         kfree(in_sbal_ptrs);
4812 out_free_qib_param:
4813         kfree(qib_param_field);
4814 out_free_nothing:
4815         return rc;
4816 }
4817
4818 static void qeth_core_free_card(struct qeth_card *card)
4819 {
4820         QETH_CARD_TEXT(card, 2, "freecrd");
4821         qeth_clean_channel(&card->read);
4822         qeth_clean_channel(&card->write);
4823         qeth_clean_channel(&card->data);
4824         qeth_put_cmd(card->read_cmd);
4825         destroy_workqueue(card->event_wq);
4826         qeth_free_qdio_queues(card);
4827         unregister_service_level(&card->qeth_service_level);
4828         dev_set_drvdata(&card->gdev->dev, NULL);
4829         kfree(card);
4830 }
4831
4832 void qeth_trace_features(struct qeth_card *card)
4833 {
4834         QETH_CARD_TEXT(card, 2, "features");
4835         QETH_CARD_HEX(card, 2, &card->options.ipa4, sizeof(card->options.ipa4));
4836         QETH_CARD_HEX(card, 2, &card->options.ipa6, sizeof(card->options.ipa6));
4837         QETH_CARD_HEX(card, 2, &card->options.adp, sizeof(card->options.adp));
4838         QETH_CARD_HEX(card, 2, &card->info.diagass_support,
4839                       sizeof(card->info.diagass_support));
4840 }
4841 EXPORT_SYMBOL_GPL(qeth_trace_features);
4842
4843 static struct ccw_device_id qeth_ids[] = {
4844         {CCW_DEVICE_DEVTYPE(0x1731, 0x01, 0x1732, 0x01),
4845                                         .driver_info = QETH_CARD_TYPE_OSD},
4846         {CCW_DEVICE_DEVTYPE(0x1731, 0x05, 0x1732, 0x05),
4847                                         .driver_info = QETH_CARD_TYPE_IQD},
4848         {CCW_DEVICE_DEVTYPE(0x1731, 0x06, 0x1732, 0x06),
4849                                         .driver_info = QETH_CARD_TYPE_OSN},
4850         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x03),
4851                                         .driver_info = QETH_CARD_TYPE_OSM},
4852         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x02),
4853                                         .driver_info = QETH_CARD_TYPE_OSX},
4854         {},
4855 };
4856 MODULE_DEVICE_TABLE(ccw, qeth_ids);
4857
4858 static struct ccw_driver qeth_ccw_driver = {
4859         .driver = {
4860                 .owner = THIS_MODULE,
4861                 .name = "qeth",
4862         },
4863         .ids = qeth_ids,
4864         .probe = ccwgroup_probe_ccwdev,
4865         .remove = ccwgroup_remove_ccwdev,
4866 };
4867
4868 int qeth_core_hardsetup_card(struct qeth_card *card, bool *carrier_ok)
4869 {
4870         int retries = 3;
4871         int rc;
4872
4873         QETH_CARD_TEXT(card, 2, "hrdsetup");
4874         atomic_set(&card->force_alloc_skb, 0);
4875         rc = qeth_update_from_chp_desc(card);
4876         if (rc)
4877                 return rc;
4878 retry:
4879         if (retries < 3)
4880                 QETH_DBF_MESSAGE(2, "Retrying to do IDX activates on device %x.\n",
4881                                  CARD_DEVID(card));
4882         rc = qeth_qdio_clear_card(card, !IS_IQD(card));
4883         ccw_device_set_offline(CARD_DDEV(card));
4884         ccw_device_set_offline(CARD_WDEV(card));
4885         ccw_device_set_offline(CARD_RDEV(card));
4886         qdio_free(CARD_DDEV(card));
4887         rc = ccw_device_set_online(CARD_RDEV(card));
4888         if (rc)
4889                 goto retriable;
4890         rc = ccw_device_set_online(CARD_WDEV(card));
4891         if (rc)
4892                 goto retriable;
4893         rc = ccw_device_set_online(CARD_DDEV(card));
4894         if (rc)
4895                 goto retriable;
4896 retriable:
4897         if (rc == -ERESTARTSYS) {
4898                 QETH_CARD_TEXT(card, 2, "break1");
4899                 return rc;
4900         } else if (rc) {
4901                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
4902                 if (--retries < 0)
4903                         goto out;
4904                 else
4905                         goto retry;
4906         }
4907         qeth_determine_capabilities(card);
4908         qeth_init_tokens(card);
4909         qeth_init_func_level(card);
4910
4911         rc = qeth_idx_activate_read_channel(card);
4912         if (rc == -EINTR) {
4913                 QETH_CARD_TEXT(card, 2, "break2");
4914                 return rc;
4915         } else if (rc) {
4916                 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
4917                 if (--retries < 0)
4918                         goto out;
4919                 else
4920                         goto retry;
4921         }
4922
4923         rc = qeth_idx_activate_write_channel(card);
4924         if (rc == -EINTR) {
4925                 QETH_CARD_TEXT(card, 2, "break3");
4926                 return rc;
4927         } else if (rc) {
4928                 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
4929                 if (--retries < 0)
4930                         goto out;
4931                 else
4932                         goto retry;
4933         }
4934         card->read_or_write_problem = 0;
4935         rc = qeth_mpc_initialize(card);
4936         if (rc) {
4937                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
4938                 goto out;
4939         }
4940
4941         rc = qeth_send_startlan(card);
4942         if (rc) {
4943                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
4944                 if (rc == -ENETDOWN) {
4945                         dev_warn(&card->gdev->dev, "The LAN is offline\n");
4946                         *carrier_ok = false;
4947                 } else {
4948                         goto out;
4949                 }
4950         } else {
4951                 *carrier_ok = true;
4952         }
4953
4954         card->options.ipa4.supported_funcs = 0;
4955         card->options.ipa6.supported_funcs = 0;
4956         card->options.adp.supported_funcs = 0;
4957         card->options.sbp.supported_funcs = 0;
4958         card->info.diagass_support = 0;
4959         rc = qeth_query_ipassists(card, QETH_PROT_IPV4);
4960         if (rc == -ENOMEM)
4961                 goto out;
4962         if (qeth_is_supported(card, IPA_IPV6)) {
4963                 rc = qeth_query_ipassists(card, QETH_PROT_IPV6);
4964                 if (rc == -ENOMEM)
4965                         goto out;
4966         }
4967         if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
4968                 rc = qeth_query_setadapterparms(card);
4969                 if (rc < 0) {
4970                         QETH_CARD_TEXT_(card, 2, "7err%d", rc);
4971                         goto out;
4972                 }
4973         }
4974         if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
4975                 rc = qeth_query_setdiagass(card);
4976                 if (rc < 0) {
4977                         QETH_CARD_TEXT_(card, 2, "8err%d", rc);
4978                         goto out;
4979                 }
4980         }
4981         return 0;
4982 out:
4983         dev_warn(&card->gdev->dev, "The qeth device driver failed to recover "
4984                 "an error on the device\n");
4985         QETH_DBF_MESSAGE(2, "Initialization for device %x failed in hardsetup! rc=%d\n",
4986                          CARD_DEVID(card), rc);
4987         return rc;
4988 }
4989 EXPORT_SYMBOL_GPL(qeth_core_hardsetup_card);
4990
4991 static void qeth_create_skb_frag(struct qdio_buffer_element *element,
4992                                  struct sk_buff *skb, int offset, int data_len)
4993 {
4994         struct page *page = virt_to_page(element->addr);
4995         unsigned int next_frag;
4996
4997         /* first fill the linear space */
4998         if (!skb->len) {
4999                 unsigned int linear = min(data_len, skb_tailroom(skb));
5000
5001                 skb_put_data(skb, element->addr + offset, linear);
5002                 data_len -= linear;
5003                 if (!data_len)
5004                         return;
5005                 offset += linear;
5006                 /* fall through to add page frag for remaining data */
5007         }
5008
5009         next_frag = skb_shinfo(skb)->nr_frags;
5010         get_page(page);
5011         skb_add_rx_frag(skb, next_frag, page, offset, data_len, data_len);
5012 }
5013
5014 static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale)
5015 {
5016         return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY);
5017 }
5018
5019 struct sk_buff *qeth_core_get_next_skb(struct qeth_card *card,
5020                 struct qeth_qdio_buffer *qethbuffer,
5021                 struct qdio_buffer_element **__element, int *__offset,
5022                 struct qeth_hdr **hdr)
5023 {
5024         struct qdio_buffer_element *element = *__element;
5025         struct qdio_buffer *buffer = qethbuffer->buffer;
5026         int offset = *__offset;
5027         struct sk_buff *skb;
5028         int skb_len = 0;
5029         void *data_ptr;
5030         int data_len;
5031         int headroom = 0;
5032         int use_rx_sg = 0;
5033
5034         /* qeth_hdr must not cross element boundaries */
5035         while (element->length < offset + sizeof(struct qeth_hdr)) {
5036                 if (qeth_is_last_sbale(element))
5037                         return NULL;
5038                 element++;
5039                 offset = 0;
5040         }
5041         *hdr = element->addr + offset;
5042
5043         offset += sizeof(struct qeth_hdr);
5044         switch ((*hdr)->hdr.l2.id) {
5045         case QETH_HEADER_TYPE_LAYER2:
5046                 skb_len = (*hdr)->hdr.l2.pkt_length;
5047                 break;
5048         case QETH_HEADER_TYPE_LAYER3:
5049                 skb_len = (*hdr)->hdr.l3.length;
5050                 headroom = ETH_HLEN;
5051                 break;
5052         case QETH_HEADER_TYPE_OSN:
5053                 skb_len = (*hdr)->hdr.osn.pdu_length;
5054                 headroom = sizeof(struct qeth_hdr);
5055                 break;
5056         default:
5057                 break;
5058         }
5059
5060         if (!skb_len)
5061                 return NULL;
5062
5063         if (((skb_len >= card->options.rx_sg_cb) &&
5064              !IS_OSN(card) &&
5065              (!atomic_read(&card->force_alloc_skb))) ||
5066             (card->options.cq == QETH_CQ_ENABLED))
5067                 use_rx_sg = 1;
5068
5069         if (use_rx_sg && qethbuffer->rx_skb) {
5070                 /* QETH_CQ_ENABLED only: */
5071                 skb = qethbuffer->rx_skb;
5072                 qethbuffer->rx_skb = NULL;
5073         } else {
5074                 unsigned int linear = (use_rx_sg) ? QETH_RX_PULL_LEN : skb_len;
5075
5076                 skb = napi_alloc_skb(&card->napi, linear + headroom);
5077         }
5078         if (!skb)
5079                 goto no_mem;
5080         if (headroom)
5081                 skb_reserve(skb, headroom);
5082
5083         data_ptr = element->addr + offset;
5084         while (skb_len) {
5085                 data_len = min(skb_len, (int)(element->length - offset));
5086                 if (data_len) {
5087                         if (use_rx_sg)
5088                                 qeth_create_skb_frag(element, skb, offset,
5089                                                      data_len);
5090                         else
5091                                 skb_put_data(skb, data_ptr, data_len);
5092                 }
5093                 skb_len -= data_len;
5094                 if (skb_len) {
5095                         if (qeth_is_last_sbale(element)) {
5096                                 QETH_CARD_TEXT(card, 4, "unexeob");
5097                                 QETH_CARD_HEX(card, 2, buffer, sizeof(void *));
5098                                 dev_kfree_skb_any(skb);
5099                                 QETH_CARD_STAT_INC(card, rx_errors);
5100                                 return NULL;
5101                         }
5102                         element++;
5103                         offset = 0;
5104                         data_ptr = element->addr;
5105                 } else {
5106                         offset += data_len;
5107                 }
5108         }
5109         *__element = element;
5110         *__offset = offset;
5111         if (use_rx_sg) {
5112                 QETH_CARD_STAT_INC(card, rx_sg_skbs);
5113                 QETH_CARD_STAT_ADD(card, rx_sg_frags,
5114                                    skb_shinfo(skb)->nr_frags);
5115         }
5116         return skb;
5117 no_mem:
5118         if (net_ratelimit()) {
5119                 QETH_CARD_TEXT(card, 2, "noskbmem");
5120         }
5121         QETH_CARD_STAT_INC(card, rx_dropped);
5122         return NULL;
5123 }
5124 EXPORT_SYMBOL_GPL(qeth_core_get_next_skb);
5125
5126 int qeth_poll(struct napi_struct *napi, int budget)
5127 {
5128         struct qeth_card *card = container_of(napi, struct qeth_card, napi);
5129         int work_done = 0;
5130         struct qeth_qdio_buffer *buffer;
5131         int done;
5132         int new_budget = budget;
5133
5134         while (1) {
5135                 if (!card->rx.b_count) {
5136                         card->rx.qdio_err = 0;
5137                         card->rx.b_count = qdio_get_next_buffers(
5138                                 card->data.ccwdev, 0, &card->rx.b_index,
5139                                 &card->rx.qdio_err);
5140                         if (card->rx.b_count <= 0) {
5141                                 card->rx.b_count = 0;
5142                                 break;
5143                         }
5144                         card->rx.b_element =
5145                                 &card->qdio.in_q->bufs[card->rx.b_index]
5146                                 .buffer->element[0];
5147                         card->rx.e_offset = 0;
5148                 }
5149
5150                 while (card->rx.b_count) {
5151                         buffer = &card->qdio.in_q->bufs[card->rx.b_index];
5152                         if (!(card->rx.qdio_err &&
5153                             qeth_check_qdio_errors(card, buffer->buffer,
5154                             card->rx.qdio_err, "qinerr")))
5155                                 work_done +=
5156                                         card->discipline->process_rx_buffer(
5157                                                 card, new_budget, &done);
5158                         else
5159                                 done = 1;
5160
5161                         if (done) {
5162                                 QETH_CARD_STAT_INC(card, rx_bufs);
5163                                 qeth_put_buffer_pool_entry(card,
5164                                         buffer->pool_entry);
5165                                 qeth_queue_input_buffer(card, card->rx.b_index);
5166                                 card->rx.b_count--;
5167                                 if (card->rx.b_count) {
5168                                         card->rx.b_index =
5169                                                 (card->rx.b_index + 1) %
5170                                                 QDIO_MAX_BUFFERS_PER_Q;
5171                                         card->rx.b_element =
5172                                                 &card->qdio.in_q
5173                                                 ->bufs[card->rx.b_index]
5174                                                 .buffer->element[0];
5175                                         card->rx.e_offset = 0;
5176                                 }
5177                         }
5178
5179                         if (work_done >= budget)
5180                                 goto out;
5181                         else
5182                                 new_budget = budget - work_done;
5183                 }
5184         }
5185
5186         napi_complete_done(napi, work_done);
5187         if (qdio_start_irq(card->data.ccwdev, 0))
5188                 napi_schedule(&card->napi);
5189 out:
5190         return work_done;
5191 }
5192 EXPORT_SYMBOL_GPL(qeth_poll);
5193
5194 static void qeth_iqd_tx_complete(struct qeth_qdio_out_q *queue,
5195                                  unsigned int bidx, bool error, int budget)
5196 {
5197         struct qeth_qdio_out_buffer *buffer = queue->bufs[bidx];
5198         u8 sflags = buffer->buffer->element[15].sflags;
5199         struct qeth_card *card = queue->card;
5200
5201         if (queue->bufstates && (queue->bufstates[bidx].flags &
5202                                  QDIO_OUTBUF_STATE_FLAG_PENDING)) {
5203                 WARN_ON_ONCE(card->options.cq != QETH_CQ_ENABLED);
5204
5205                 if (atomic_cmpxchg(&buffer->state, QETH_QDIO_BUF_PRIMED,
5206                                                    QETH_QDIO_BUF_PENDING) ==
5207                     QETH_QDIO_BUF_PRIMED)
5208                         qeth_notify_skbs(queue, buffer, TX_NOTIFY_PENDING);
5209
5210                 QETH_CARD_TEXT_(card, 5, "pel%u", bidx);
5211
5212                 /* prepare the queue slot for re-use: */
5213                 qeth_scrub_qdio_buffer(buffer->buffer, queue->max_elements);
5214                 if (qeth_init_qdio_out_buf(queue, bidx)) {
5215                         QETH_CARD_TEXT(card, 2, "outofbuf");
5216                         qeth_schedule_recovery(card);
5217                 }
5218
5219                 return;
5220         }
5221
5222         if (card->options.cq == QETH_CQ_ENABLED)
5223                 qeth_notify_skbs(queue, buffer,
5224                                  qeth_compute_cq_notification(sflags, 0));
5225         qeth_clear_output_buffer(queue, buffer, error, budget);
5226 }
5227
5228 static int qeth_tx_poll(struct napi_struct *napi, int budget)
5229 {
5230         struct qeth_qdio_out_q *queue = qeth_napi_to_out_queue(napi);
5231         unsigned int queue_no = queue->queue_no;
5232         struct qeth_card *card = queue->card;
5233         struct net_device *dev = card->dev;
5234         unsigned int work_done = 0;
5235         struct netdev_queue *txq;
5236
5237         txq = netdev_get_tx_queue(dev, qeth_iqd_translate_txq(dev, queue_no));
5238
5239         while (1) {
5240                 unsigned int start, error, i;
5241                 unsigned int packets = 0;
5242                 unsigned int bytes = 0;
5243                 int completed;
5244
5245                 if (qeth_out_queue_is_empty(queue)) {
5246                         napi_complete(napi);
5247                         return 0;
5248                 }
5249
5250                 /* Give the CPU a breather: */
5251                 if (work_done >= QDIO_MAX_BUFFERS_PER_Q) {
5252                         QETH_TXQ_STAT_INC(queue, completion_yield);
5253                         if (napi_complete_done(napi, 0))
5254                                 napi_schedule(napi);
5255                         return 0;
5256                 }
5257
5258                 completed = qdio_inspect_queue(CARD_DDEV(card), queue_no, false,
5259                                                &start, &error);
5260                 if (completed <= 0) {
5261                         /* Ensure we see TX completion for pending work: */
5262                         if (napi_complete_done(napi, 0))
5263                                 qeth_tx_arm_timer(queue);
5264                         return 0;
5265                 }
5266
5267                 for (i = start; i < start + completed; i++) {
5268                         struct qeth_qdio_out_buffer *buffer;
5269                         unsigned int bidx = QDIO_BUFNR(i);
5270
5271                         buffer = queue->bufs[bidx];
5272                         packets += skb_queue_len(&buffer->skb_list);
5273                         bytes += buffer->bytes;
5274
5275                         qeth_handle_send_error(card, buffer, error);
5276                         qeth_iqd_tx_complete(queue, bidx, error, budget);
5277                         qeth_cleanup_handled_pending(queue, bidx, false);
5278                 }
5279
5280                 netdev_tx_completed_queue(txq, packets, bytes);
5281                 atomic_sub(completed, &queue->used_buffers);
5282                 work_done += completed;
5283
5284                 /* xmit may have observed the full-condition, but not yet
5285                  * stopped the txq. In which case the code below won't trigger.
5286                  * So before returning, xmit will re-check the txq's fill level
5287                  * and wake it up if needed.
5288                  */
5289                 if (netif_tx_queue_stopped(txq) &&
5290                     !qeth_out_queue_is_full(queue))
5291                         netif_tx_wake_queue(txq);
5292         }
5293 }
5294
5295 static int qeth_setassparms_inspect_rc(struct qeth_ipa_cmd *cmd)
5296 {
5297         if (!cmd->hdr.return_code)
5298                 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
5299         return cmd->hdr.return_code;
5300 }
5301
5302 static int qeth_setassparms_get_caps_cb(struct qeth_card *card,
5303                                         struct qeth_reply *reply,
5304                                         unsigned long data)
5305 {
5306         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5307         struct qeth_ipa_caps *caps = reply->param;
5308
5309         if (qeth_setassparms_inspect_rc(cmd))
5310                 return -EIO;
5311
5312         caps->supported = cmd->data.setassparms.data.caps.supported;
5313         caps->enabled = cmd->data.setassparms.data.caps.enabled;
5314         return 0;
5315 }
5316
5317 int qeth_setassparms_cb(struct qeth_card *card,
5318                         struct qeth_reply *reply, unsigned long data)
5319 {
5320         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5321
5322         QETH_CARD_TEXT(card, 4, "defadpcb");
5323
5324         if (cmd->hdr.return_code)
5325                 return -EIO;
5326
5327         cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
5328         if (cmd->hdr.prot_version == QETH_PROT_IPV4)
5329                 card->options.ipa4.enabled_funcs = cmd->hdr.ipa_enabled;
5330         if (cmd->hdr.prot_version == QETH_PROT_IPV6)
5331                 card->options.ipa6.enabled_funcs = cmd->hdr.ipa_enabled;
5332         return 0;
5333 }
5334 EXPORT_SYMBOL_GPL(qeth_setassparms_cb);
5335
5336 struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card,
5337                                                  enum qeth_ipa_funcs ipa_func,
5338                                                  u16 cmd_code,
5339                                                  unsigned int data_length,
5340                                                  enum qeth_prot_versions prot)
5341 {
5342         struct qeth_ipacmd_setassparms *setassparms;
5343         struct qeth_ipacmd_setassparms_hdr *hdr;
5344         struct qeth_cmd_buffer *iob;
5345
5346         QETH_CARD_TEXT(card, 4, "getasscm");
5347         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETASSPARMS, prot,
5348                                  data_length +
5349                                  offsetof(struct qeth_ipacmd_setassparms,
5350                                           data));
5351         if (!iob)
5352                 return NULL;
5353
5354         setassparms = &__ipa_cmd(iob)->data.setassparms;
5355         setassparms->assist_no = ipa_func;
5356
5357         hdr = &setassparms->hdr;
5358         hdr->length = sizeof(*hdr) + data_length;
5359         hdr->command_code = cmd_code;
5360         return iob;
5361 }
5362 EXPORT_SYMBOL_GPL(qeth_get_setassparms_cmd);
5363
5364 int qeth_send_simple_setassparms_prot(struct qeth_card *card,
5365                                       enum qeth_ipa_funcs ipa_func,
5366                                       u16 cmd_code, u32 *data,
5367                                       enum qeth_prot_versions prot)
5368 {
5369         unsigned int length = data ? SETASS_DATA_SIZEOF(flags_32bit) : 0;
5370         struct qeth_cmd_buffer *iob;
5371
5372         QETH_CARD_TEXT_(card, 4, "simassp%i", prot);
5373         iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code, length, prot);
5374         if (!iob)
5375                 return -ENOMEM;
5376
5377         if (data)
5378                 __ipa_cmd(iob)->data.setassparms.data.flags_32bit = *data;
5379         return qeth_send_ipa_cmd(card, iob, qeth_setassparms_cb, NULL);
5380 }
5381 EXPORT_SYMBOL_GPL(qeth_send_simple_setassparms_prot);
5382
5383 static void qeth_unregister_dbf_views(void)
5384 {
5385         int x;
5386         for (x = 0; x < QETH_DBF_INFOS; x++) {
5387                 debug_unregister(qeth_dbf[x].id);
5388                 qeth_dbf[x].id = NULL;
5389         }
5390 }
5391
5392 void qeth_dbf_longtext(debug_info_t *id, int level, char *fmt, ...)
5393 {
5394         char dbf_txt_buf[32];
5395         va_list args;
5396
5397         if (!debug_level_enabled(id, level))
5398                 return;
5399         va_start(args, fmt);
5400         vsnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
5401         va_end(args);
5402         debug_text_event(id, level, dbf_txt_buf);
5403 }
5404 EXPORT_SYMBOL_GPL(qeth_dbf_longtext);
5405
5406 static int qeth_register_dbf_views(void)
5407 {
5408         int ret;
5409         int x;
5410
5411         for (x = 0; x < QETH_DBF_INFOS; x++) {
5412                 /* register the areas */
5413                 qeth_dbf[x].id = debug_register(qeth_dbf[x].name,
5414                                                 qeth_dbf[x].pages,
5415                                                 qeth_dbf[x].areas,
5416                                                 qeth_dbf[x].len);
5417                 if (qeth_dbf[x].id == NULL) {
5418                         qeth_unregister_dbf_views();
5419                         return -ENOMEM;
5420                 }
5421
5422                 /* register a view */
5423                 ret = debug_register_view(qeth_dbf[x].id, qeth_dbf[x].view);
5424                 if (ret) {
5425                         qeth_unregister_dbf_views();
5426                         return ret;
5427                 }
5428
5429                 /* set a passing level */
5430                 debug_set_level(qeth_dbf[x].id, qeth_dbf[x].level);
5431         }
5432
5433         return 0;
5434 }
5435
5436 static DEFINE_MUTEX(qeth_mod_mutex);    /* for synchronized module loading */
5437
5438 int qeth_core_load_discipline(struct qeth_card *card,
5439                 enum qeth_discipline_id discipline)
5440 {
5441         mutex_lock(&qeth_mod_mutex);
5442         switch (discipline) {
5443         case QETH_DISCIPLINE_LAYER3:
5444                 card->discipline = try_then_request_module(
5445                         symbol_get(qeth_l3_discipline), "qeth_l3");
5446                 break;
5447         case QETH_DISCIPLINE_LAYER2:
5448                 card->discipline = try_then_request_module(
5449                         symbol_get(qeth_l2_discipline), "qeth_l2");
5450                 break;
5451         default:
5452                 break;
5453         }
5454         mutex_unlock(&qeth_mod_mutex);
5455
5456         if (!card->discipline) {
5457                 dev_err(&card->gdev->dev, "There is no kernel module to "
5458                         "support discipline %d\n", discipline);
5459                 return -EINVAL;
5460         }
5461
5462         card->options.layer = discipline;
5463         return 0;
5464 }
5465
5466 void qeth_core_free_discipline(struct qeth_card *card)
5467 {
5468         if (IS_LAYER2(card))
5469                 symbol_put(qeth_l2_discipline);
5470         else
5471                 symbol_put(qeth_l3_discipline);
5472         card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
5473         card->discipline = NULL;
5474 }
5475
5476 const struct device_type qeth_generic_devtype = {
5477         .name = "qeth_generic",
5478         .groups = qeth_generic_attr_groups,
5479 };
5480 EXPORT_SYMBOL_GPL(qeth_generic_devtype);
5481
5482 static const struct device_type qeth_osn_devtype = {
5483         .name = "qeth_osn",
5484         .groups = qeth_osn_attr_groups,
5485 };
5486
5487 #define DBF_NAME_LEN    20
5488
5489 struct qeth_dbf_entry {
5490         char dbf_name[DBF_NAME_LEN];
5491         debug_info_t *dbf_info;
5492         struct list_head dbf_list;
5493 };
5494
5495 static LIST_HEAD(qeth_dbf_list);
5496 static DEFINE_MUTEX(qeth_dbf_list_mutex);
5497
5498 static debug_info_t *qeth_get_dbf_entry(char *name)
5499 {
5500         struct qeth_dbf_entry *entry;
5501         debug_info_t *rc = NULL;
5502
5503         mutex_lock(&qeth_dbf_list_mutex);
5504         list_for_each_entry(entry, &qeth_dbf_list, dbf_list) {
5505                 if (strcmp(entry->dbf_name, name) == 0) {
5506                         rc = entry->dbf_info;
5507                         break;
5508                 }
5509         }
5510         mutex_unlock(&qeth_dbf_list_mutex);
5511         return rc;
5512 }
5513
5514 static int qeth_add_dbf_entry(struct qeth_card *card, char *name)
5515 {
5516         struct qeth_dbf_entry *new_entry;
5517
5518         card->debug = debug_register(name, 2, 1, 8);
5519         if (!card->debug) {
5520                 QETH_DBF_TEXT_(SETUP, 2, "%s", "qcdbf");
5521                 goto err;
5522         }
5523         if (debug_register_view(card->debug, &debug_hex_ascii_view))
5524                 goto err_dbg;
5525         new_entry = kzalloc(sizeof(struct qeth_dbf_entry), GFP_KERNEL);
5526         if (!new_entry)
5527                 goto err_dbg;
5528         strncpy(new_entry->dbf_name, name, DBF_NAME_LEN);
5529         new_entry->dbf_info = card->debug;
5530         mutex_lock(&qeth_dbf_list_mutex);
5531         list_add(&new_entry->dbf_list, &qeth_dbf_list);
5532         mutex_unlock(&qeth_dbf_list_mutex);
5533
5534         return 0;
5535
5536 err_dbg:
5537         debug_unregister(card->debug);
5538 err:
5539         return -ENOMEM;
5540 }
5541
5542 static void qeth_clear_dbf_list(void)
5543 {
5544         struct qeth_dbf_entry *entry, *tmp;
5545
5546         mutex_lock(&qeth_dbf_list_mutex);
5547         list_for_each_entry_safe(entry, tmp, &qeth_dbf_list, dbf_list) {
5548                 list_del(&entry->dbf_list);
5549                 debug_unregister(entry->dbf_info);
5550                 kfree(entry);
5551         }
5552         mutex_unlock(&qeth_dbf_list_mutex);
5553 }
5554
5555 static struct net_device *qeth_alloc_netdev(struct qeth_card *card)
5556 {
5557         struct net_device *dev;
5558
5559         switch (card->info.type) {
5560         case QETH_CARD_TYPE_IQD:
5561                 dev = alloc_netdev_mqs(0, "hsi%d", NET_NAME_UNKNOWN,
5562                                        ether_setup, QETH_MAX_QUEUES, 1);
5563                 break;
5564         case QETH_CARD_TYPE_OSM:
5565                 dev = alloc_etherdev(0);
5566                 break;
5567         case QETH_CARD_TYPE_OSN:
5568                 dev = alloc_netdev(0, "osn%d", NET_NAME_UNKNOWN, ether_setup);
5569                 break;
5570         default:
5571                 dev = alloc_etherdev_mqs(0, QETH_MAX_QUEUES, 1);
5572         }
5573
5574         if (!dev)
5575                 return NULL;
5576
5577         dev->ml_priv = card;
5578         dev->watchdog_timeo = QETH_TX_TIMEOUT;
5579         dev->min_mtu = IS_OSN(card) ? 64 : 576;
5580          /* initialized when device first goes online: */
5581         dev->max_mtu = 0;
5582         dev->mtu = 0;
5583         SET_NETDEV_DEV(dev, &card->gdev->dev);
5584         netif_carrier_off(dev);
5585
5586         if (IS_OSN(card)) {
5587                 dev->ethtool_ops = &qeth_osn_ethtool_ops;
5588         } else {
5589                 dev->ethtool_ops = &qeth_ethtool_ops;
5590                 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
5591                 dev->hw_features |= NETIF_F_SG;
5592                 dev->vlan_features |= NETIF_F_SG;
5593                 if (IS_IQD(card)) {
5594                         dev->features |= NETIF_F_SG;
5595                         if (netif_set_real_num_tx_queues(dev,
5596                                                          QETH_IQD_MIN_TXQ)) {
5597                                 free_netdev(dev);
5598                                 return NULL;
5599                         }
5600                 }
5601         }
5602
5603         return dev;
5604 }
5605
5606 struct net_device *qeth_clone_netdev(struct net_device *orig)
5607 {
5608         struct net_device *clone = qeth_alloc_netdev(orig->ml_priv);
5609
5610         if (!clone)
5611                 return NULL;
5612
5613         clone->dev_port = orig->dev_port;
5614         return clone;
5615 }
5616
5617 static int qeth_core_probe_device(struct ccwgroup_device *gdev)
5618 {
5619         struct qeth_card *card;
5620         struct device *dev;
5621         int rc;
5622         enum qeth_discipline_id enforced_disc;
5623         char dbf_name[DBF_NAME_LEN];
5624
5625         QETH_DBF_TEXT(SETUP, 2, "probedev");
5626
5627         dev = &gdev->dev;
5628         if (!get_device(dev))
5629                 return -ENODEV;
5630
5631         QETH_DBF_TEXT_(SETUP, 2, "%s", dev_name(&gdev->dev));
5632
5633         card = qeth_alloc_card(gdev);
5634         if (!card) {
5635                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM);
5636                 rc = -ENOMEM;
5637                 goto err_dev;
5638         }
5639
5640         snprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
5641                 dev_name(&gdev->dev));
5642         card->debug = qeth_get_dbf_entry(dbf_name);
5643         if (!card->debug) {
5644                 rc = qeth_add_dbf_entry(card, dbf_name);
5645                 if (rc)
5646                         goto err_card;
5647         }
5648
5649         qeth_setup_card(card);
5650         card->dev = qeth_alloc_netdev(card);
5651         if (!card->dev) {
5652                 rc = -ENOMEM;
5653                 goto err_card;
5654         }
5655
5656         card->qdio.no_out_queues = card->dev->num_tx_queues;
5657         rc = qeth_update_from_chp_desc(card);
5658         if (rc)
5659                 goto err_chp_desc;
5660         qeth_determine_capabilities(card);
5661         qeth_set_blkt_defaults(card);
5662
5663         enforced_disc = qeth_enforce_discipline(card);
5664         switch (enforced_disc) {
5665         case QETH_DISCIPLINE_UNDETERMINED:
5666                 gdev->dev.type = &qeth_generic_devtype;
5667                 break;
5668         default:
5669                 card->info.layer_enforced = true;
5670                 rc = qeth_core_load_discipline(card, enforced_disc);
5671                 if (rc)
5672                         goto err_load;
5673
5674                 gdev->dev.type = IS_OSN(card) ? &qeth_osn_devtype :
5675                                                 card->discipline->devtype;
5676                 rc = card->discipline->setup(card->gdev);
5677                 if (rc)
5678                         goto err_disc;
5679                 break;
5680         }
5681
5682         return 0;
5683
5684 err_disc:
5685         qeth_core_free_discipline(card);
5686 err_load:
5687 err_chp_desc:
5688         free_netdev(card->dev);
5689 err_card:
5690         qeth_core_free_card(card);
5691 err_dev:
5692         put_device(dev);
5693         return rc;
5694 }
5695
5696 static void qeth_core_remove_device(struct ccwgroup_device *gdev)
5697 {
5698         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5699
5700         QETH_CARD_TEXT(card, 2, "removedv");
5701
5702         if (card->discipline) {
5703                 card->discipline->remove(gdev);
5704                 qeth_core_free_discipline(card);
5705         }
5706
5707         free_netdev(card->dev);
5708         qeth_core_free_card(card);
5709         put_device(&gdev->dev);
5710 }
5711
5712 static int qeth_core_set_online(struct ccwgroup_device *gdev)
5713 {
5714         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5715         int rc = 0;
5716         enum qeth_discipline_id def_discipline;
5717
5718         if (!card->discipline) {
5719                 def_discipline = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
5720                                                 QETH_DISCIPLINE_LAYER2;
5721                 rc = qeth_core_load_discipline(card, def_discipline);
5722                 if (rc)
5723                         goto err;
5724                 rc = card->discipline->setup(card->gdev);
5725                 if (rc) {
5726                         qeth_core_free_discipline(card);
5727                         goto err;
5728                 }
5729         }
5730         rc = card->discipline->set_online(gdev);
5731 err:
5732         return rc;
5733 }
5734
5735 static int qeth_core_set_offline(struct ccwgroup_device *gdev)
5736 {
5737         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5738         return card->discipline->set_offline(gdev);
5739 }
5740
5741 static void qeth_core_shutdown(struct ccwgroup_device *gdev)
5742 {
5743         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5744         qeth_set_allowed_threads(card, 0, 1);
5745         if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
5746                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
5747         qeth_qdio_clear_card(card, 0);
5748         qeth_drain_output_queues(card);
5749         qdio_free(CARD_DDEV(card));
5750 }
5751
5752 static int qeth_suspend(struct ccwgroup_device *gdev)
5753 {
5754         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5755
5756         qeth_set_allowed_threads(card, 0, 1);
5757         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
5758         if (gdev->state == CCWGROUP_OFFLINE)
5759                 return 0;
5760
5761         card->discipline->set_offline(gdev);
5762         return 0;
5763 }
5764
5765 static int qeth_resume(struct ccwgroup_device *gdev)
5766 {
5767         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5768         int rc;
5769
5770         rc = card->discipline->set_online(gdev);
5771
5772         qeth_set_allowed_threads(card, 0xffffffff, 0);
5773         if (rc)
5774                 dev_warn(&card->gdev->dev, "The qeth device driver failed to recover an error on the device\n");
5775         return rc;
5776 }
5777
5778 static ssize_t group_store(struct device_driver *ddrv, const char *buf,
5779                            size_t count)
5780 {
5781         int err;
5782
5783         err = ccwgroup_create_dev(qeth_core_root_dev, to_ccwgroupdrv(ddrv), 3,
5784                                   buf);
5785
5786         return err ? err : count;
5787 }
5788 static DRIVER_ATTR_WO(group);
5789
5790 static struct attribute *qeth_drv_attrs[] = {
5791         &driver_attr_group.attr,
5792         NULL,
5793 };
5794 static struct attribute_group qeth_drv_attr_group = {
5795         .attrs = qeth_drv_attrs,
5796 };
5797 static const struct attribute_group *qeth_drv_attr_groups[] = {
5798         &qeth_drv_attr_group,
5799         NULL,
5800 };
5801
5802 static struct ccwgroup_driver qeth_core_ccwgroup_driver = {
5803         .driver = {
5804                 .groups = qeth_drv_attr_groups,
5805                 .owner = THIS_MODULE,
5806                 .name = "qeth",
5807         },
5808         .ccw_driver = &qeth_ccw_driver,
5809         .setup = qeth_core_probe_device,
5810         .remove = qeth_core_remove_device,
5811         .set_online = qeth_core_set_online,
5812         .set_offline = qeth_core_set_offline,
5813         .shutdown = qeth_core_shutdown,
5814         .prepare = NULL,
5815         .complete = NULL,
5816         .freeze = qeth_suspend,
5817         .thaw = qeth_resume,
5818         .restore = qeth_resume,
5819 };
5820
5821 struct qeth_card *qeth_get_card_by_busid(char *bus_id)
5822 {
5823         struct ccwgroup_device *gdev;
5824         struct qeth_card *card;
5825
5826         gdev = get_ccwgroupdev_by_busid(&qeth_core_ccwgroup_driver, bus_id);
5827         if (!gdev)
5828                 return NULL;
5829
5830         card = dev_get_drvdata(&gdev->dev);
5831         put_device(&gdev->dev);
5832         return card;
5833 }
5834 EXPORT_SYMBOL_GPL(qeth_get_card_by_busid);
5835
5836 int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
5837 {
5838         struct qeth_card *card = dev->ml_priv;
5839         struct mii_ioctl_data *mii_data;
5840         int rc = 0;
5841
5842         if (!card)
5843                 return -ENODEV;
5844
5845         switch (cmd) {
5846         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
5847                 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
5848                 break;
5849         case SIOC_QETH_GET_CARD_TYPE:
5850                 if ((IS_OSD(card) || IS_OSM(card) || IS_OSX(card)) &&
5851                     !IS_VM_NIC(card))
5852                         return 1;
5853                 return 0;
5854         case SIOCGMIIPHY:
5855                 mii_data = if_mii(rq);
5856                 mii_data->phy_id = 0;
5857                 break;
5858         case SIOCGMIIREG:
5859                 mii_data = if_mii(rq);
5860                 if (mii_data->phy_id != 0)
5861                         rc = -EINVAL;
5862                 else
5863                         mii_data->val_out = qeth_mdio_read(dev,
5864                                 mii_data->phy_id, mii_data->reg_num);
5865                 break;
5866         case SIOC_QETH_QUERY_OAT:
5867                 rc = qeth_query_oat_command(card, rq->ifr_ifru.ifru_data);
5868                 break;
5869         default:
5870                 if (card->discipline->do_ioctl)
5871                         rc = card->discipline->do_ioctl(dev, rq, cmd);
5872                 else
5873                         rc = -EOPNOTSUPP;
5874         }
5875         if (rc)
5876                 QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
5877         return rc;
5878 }
5879 EXPORT_SYMBOL_GPL(qeth_do_ioctl);
5880
5881 static int qeth_start_csum_cb(struct qeth_card *card, struct qeth_reply *reply,
5882                               unsigned long data)
5883 {
5884         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5885         u32 *features = reply->param;
5886
5887         if (qeth_setassparms_inspect_rc(cmd))
5888                 return -EIO;
5889
5890         *features = cmd->data.setassparms.data.flags_32bit;
5891         return 0;
5892 }
5893
5894 static int qeth_set_csum_off(struct qeth_card *card, enum qeth_ipa_funcs cstype,
5895                              enum qeth_prot_versions prot)
5896 {
5897         return qeth_send_simple_setassparms_prot(card, cstype, IPA_CMD_ASS_STOP,
5898                                                  NULL, prot);
5899 }
5900
5901 static int qeth_set_csum_on(struct qeth_card *card, enum qeth_ipa_funcs cstype,
5902                             enum qeth_prot_versions prot)
5903 {
5904         u32 required_features = QETH_IPA_CHECKSUM_UDP | QETH_IPA_CHECKSUM_TCP;
5905         struct qeth_cmd_buffer *iob;
5906         struct qeth_ipa_caps caps;
5907         u32 features;
5908         int rc;
5909
5910         /* some L3 HW requires combined L3+L4 csum offload: */
5911         if (IS_LAYER3(card) && prot == QETH_PROT_IPV4 &&
5912             cstype == IPA_OUTBOUND_CHECKSUM)
5913                 required_features |= QETH_IPA_CHECKSUM_IP_HDR;
5914
5915         iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_START, 0,
5916                                        prot);
5917         if (!iob)
5918                 return -ENOMEM;
5919
5920         rc = qeth_send_ipa_cmd(card, iob, qeth_start_csum_cb, &features);
5921         if (rc)
5922                 return rc;
5923
5924         if ((required_features & features) != required_features) {
5925                 qeth_set_csum_off(card, cstype, prot);
5926                 return -EOPNOTSUPP;
5927         }
5928
5929         iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_ENABLE,
5930                                        SETASS_DATA_SIZEOF(flags_32bit),
5931                                        prot);
5932         if (!iob) {
5933                 qeth_set_csum_off(card, cstype, prot);
5934                 return -ENOMEM;
5935         }
5936
5937         if (features & QETH_IPA_CHECKSUM_LP2LP)
5938                 required_features |= QETH_IPA_CHECKSUM_LP2LP;
5939         __ipa_cmd(iob)->data.setassparms.data.flags_32bit = required_features;
5940         rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
5941         if (rc) {
5942                 qeth_set_csum_off(card, cstype, prot);
5943                 return rc;
5944         }
5945
5946         if (!qeth_ipa_caps_supported(&caps, required_features) ||
5947             !qeth_ipa_caps_enabled(&caps, required_features)) {
5948                 qeth_set_csum_off(card, cstype, prot);
5949                 return -EOPNOTSUPP;
5950         }
5951
5952         dev_info(&card->gdev->dev, "HW Checksumming (%sbound IPv%d) enabled\n",
5953                  cstype == IPA_INBOUND_CHECKSUM ? "in" : "out", prot);
5954         if (!qeth_ipa_caps_enabled(&caps, QETH_IPA_CHECKSUM_LP2LP) &&
5955             cstype == IPA_OUTBOUND_CHECKSUM)
5956                 dev_warn(&card->gdev->dev,
5957                          "Hardware checksumming is performed only if %s and its peer use different OSA Express 3 ports\n",
5958                          QETH_CARD_IFNAME(card));
5959         return 0;
5960 }
5961
5962 static int qeth_set_ipa_csum(struct qeth_card *card, bool on, int cstype,
5963                              enum qeth_prot_versions prot)
5964 {
5965         return on ? qeth_set_csum_on(card, cstype, prot) :
5966                     qeth_set_csum_off(card, cstype, prot);
5967 }
5968
5969 static int qeth_start_tso_cb(struct qeth_card *card, struct qeth_reply *reply,
5970                              unsigned long data)
5971 {
5972         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5973         struct qeth_tso_start_data *tso_data = reply->param;
5974
5975         if (qeth_setassparms_inspect_rc(cmd))
5976                 return -EIO;
5977
5978         tso_data->mss = cmd->data.setassparms.data.tso.mss;
5979         tso_data->supported = cmd->data.setassparms.data.tso.supported;
5980         return 0;
5981 }
5982
5983 static int qeth_set_tso_off(struct qeth_card *card,
5984                             enum qeth_prot_versions prot)
5985 {
5986         return qeth_send_simple_setassparms_prot(card, IPA_OUTBOUND_TSO,
5987                                                  IPA_CMD_ASS_STOP, NULL, prot);
5988 }
5989
5990 static int qeth_set_tso_on(struct qeth_card *card,
5991                            enum qeth_prot_versions prot)
5992 {
5993         struct qeth_tso_start_data tso_data;
5994         struct qeth_cmd_buffer *iob;
5995         struct qeth_ipa_caps caps;
5996         int rc;
5997
5998         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
5999                                        IPA_CMD_ASS_START, 0, prot);
6000         if (!iob)
6001                 return -ENOMEM;
6002
6003         rc = qeth_send_ipa_cmd(card, iob, qeth_start_tso_cb, &tso_data);
6004         if (rc)
6005                 return rc;
6006
6007         if (!tso_data.mss || !(tso_data.supported & QETH_IPA_LARGE_SEND_TCP)) {
6008                 qeth_set_tso_off(card, prot);
6009                 return -EOPNOTSUPP;
6010         }
6011
6012         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6013                                        IPA_CMD_ASS_ENABLE,
6014                                        SETASS_DATA_SIZEOF(caps), prot);
6015         if (!iob) {
6016                 qeth_set_tso_off(card, prot);
6017                 return -ENOMEM;
6018         }
6019
6020         /* enable TSO capability */
6021         __ipa_cmd(iob)->data.setassparms.data.caps.enabled =
6022                 QETH_IPA_LARGE_SEND_TCP;
6023         rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6024         if (rc) {
6025                 qeth_set_tso_off(card, prot);
6026                 return rc;
6027         }
6028
6029         if (!qeth_ipa_caps_supported(&caps, QETH_IPA_LARGE_SEND_TCP) ||
6030             !qeth_ipa_caps_enabled(&caps, QETH_IPA_LARGE_SEND_TCP)) {
6031                 qeth_set_tso_off(card, prot);
6032                 return -EOPNOTSUPP;
6033         }
6034
6035         dev_info(&card->gdev->dev, "TSOv%u enabled (MSS: %u)\n", prot,
6036                  tso_data.mss);
6037         return 0;
6038 }
6039
6040 static int qeth_set_ipa_tso(struct qeth_card *card, bool on,
6041                             enum qeth_prot_versions prot)
6042 {
6043         return on ? qeth_set_tso_on(card, prot) : qeth_set_tso_off(card, prot);
6044 }
6045
6046 static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on)
6047 {
6048         int rc_ipv4 = (on) ? -EOPNOTSUPP : 0;
6049         int rc_ipv6;
6050
6051         if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
6052                 rc_ipv4 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6053                                             QETH_PROT_IPV4);
6054         if (!qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6055                 /* no/one Offload Assist available, so the rc is trivial */
6056                 return rc_ipv4;
6057
6058         rc_ipv6 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6059                                     QETH_PROT_IPV6);
6060
6061         if (on)
6062                 /* enable: success if any Assist is active */
6063                 return (rc_ipv6) ? rc_ipv4 : 0;
6064
6065         /* disable: failure if any Assist is still active */
6066         return (rc_ipv6) ? rc_ipv6 : rc_ipv4;
6067 }
6068
6069 /**
6070  * qeth_enable_hw_features() - (Re-)Enable HW functions for device features
6071  * @dev:        a net_device
6072  */
6073 void qeth_enable_hw_features(struct net_device *dev)
6074 {
6075         struct qeth_card *card = dev->ml_priv;
6076         netdev_features_t features;
6077
6078         features = dev->features;
6079         /* force-off any feature that might need an IPA sequence.
6080          * netdev_update_features() will restart them.
6081          */
6082         dev->features &= ~dev->hw_features;
6083         /* toggle VLAN filter, so that VIDs are re-programmed: */
6084         if (IS_LAYER2(card) && IS_VM_NIC(card)) {
6085                 dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
6086                 dev->wanted_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
6087         }
6088         netdev_update_features(dev);
6089         if (features != dev->features)
6090                 dev_warn(&card->gdev->dev,
6091                          "Device recovery failed to restore all offload features\n");
6092 }
6093 EXPORT_SYMBOL_GPL(qeth_enable_hw_features);
6094
6095 int qeth_set_features(struct net_device *dev, netdev_features_t features)
6096 {
6097         struct qeth_card *card = dev->ml_priv;
6098         netdev_features_t changed = dev->features ^ features;
6099         int rc = 0;
6100
6101         QETH_CARD_TEXT(card, 2, "setfeat");
6102         QETH_CARD_HEX(card, 2, &features, sizeof(features));
6103
6104         if ((changed & NETIF_F_IP_CSUM)) {
6105                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IP_CSUM,
6106                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV4);
6107                 if (rc)
6108                         changed ^= NETIF_F_IP_CSUM;
6109         }
6110         if (changed & NETIF_F_IPV6_CSUM) {
6111                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IPV6_CSUM,
6112                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV6);
6113                 if (rc)
6114                         changed ^= NETIF_F_IPV6_CSUM;
6115         }
6116         if (changed & NETIF_F_RXCSUM) {
6117                 rc = qeth_set_ipa_rx_csum(card, features & NETIF_F_RXCSUM);
6118                 if (rc)
6119                         changed ^= NETIF_F_RXCSUM;
6120         }
6121         if (changed & NETIF_F_TSO) {
6122                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO,
6123                                       QETH_PROT_IPV4);
6124                 if (rc)
6125                         changed ^= NETIF_F_TSO;
6126         }
6127         if (changed & NETIF_F_TSO6) {
6128                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO6,
6129                                       QETH_PROT_IPV6);
6130                 if (rc)
6131                         changed ^= NETIF_F_TSO6;
6132         }
6133
6134         /* everything changed successfully? */
6135         if ((dev->features ^ features) == changed)
6136                 return 0;
6137         /* something went wrong. save changed features and return error */
6138         dev->features ^= changed;
6139         return -EIO;
6140 }
6141 EXPORT_SYMBOL_GPL(qeth_set_features);
6142
6143 netdev_features_t qeth_fix_features(struct net_device *dev,
6144                                     netdev_features_t features)
6145 {
6146         struct qeth_card *card = dev->ml_priv;
6147
6148         QETH_CARD_TEXT(card, 2, "fixfeat");
6149         if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM))
6150                 features &= ~NETIF_F_IP_CSUM;
6151         if (!qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6))
6152                 features &= ~NETIF_F_IPV6_CSUM;
6153         if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM) &&
6154             !qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6155                 features &= ~NETIF_F_RXCSUM;
6156         if (!qeth_is_supported(card, IPA_OUTBOUND_TSO))
6157                 features &= ~NETIF_F_TSO;
6158         if (!qeth_is_supported6(card, IPA_OUTBOUND_TSO))
6159                 features &= ~NETIF_F_TSO6;
6160
6161         QETH_CARD_HEX(card, 2, &features, sizeof(features));
6162         return features;
6163 }
6164 EXPORT_SYMBOL_GPL(qeth_fix_features);
6165
6166 netdev_features_t qeth_features_check(struct sk_buff *skb,
6167                                       struct net_device *dev,
6168                                       netdev_features_t features)
6169 {
6170         /* GSO segmentation builds skbs with
6171          *      a (small) linear part for the headers, and
6172          *      page frags for the data.
6173          * Compared to a linear skb, the header-only part consumes an
6174          * additional buffer element. This reduces buffer utilization, and
6175          * hurts throughput. So compress small segments into one element.
6176          */
6177         if (netif_needs_gso(skb, features)) {
6178                 /* match skb_segment(): */
6179                 unsigned int doffset = skb->data - skb_mac_header(skb);
6180                 unsigned int hsize = skb_shinfo(skb)->gso_size;
6181                 unsigned int hroom = skb_headroom(skb);
6182
6183                 /* linearize only if resulting skb allocations are order-0: */
6184                 if (SKB_DATA_ALIGN(hroom + doffset + hsize) <= SKB_MAX_HEAD(0))
6185                         features &= ~NETIF_F_SG;
6186         }
6187
6188         return vlan_features_check(skb, features);
6189 }
6190 EXPORT_SYMBOL_GPL(qeth_features_check);
6191
6192 void qeth_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
6193 {
6194         struct qeth_card *card = dev->ml_priv;
6195         struct qeth_qdio_out_q *queue;
6196         unsigned int i;
6197
6198         QETH_CARD_TEXT(card, 5, "getstat");
6199
6200         stats->rx_packets = card->stats.rx_packets;
6201         stats->rx_bytes = card->stats.rx_bytes;
6202         stats->rx_errors = card->stats.rx_errors;
6203         stats->rx_dropped = card->stats.rx_dropped;
6204         stats->multicast = card->stats.rx_multicast;
6205
6206         for (i = 0; i < card->qdio.no_out_queues; i++) {
6207                 queue = card->qdio.out_qs[i];
6208
6209                 stats->tx_packets += queue->stats.tx_packets;
6210                 stats->tx_bytes += queue->stats.tx_bytes;
6211                 stats->tx_errors += queue->stats.tx_errors;
6212                 stats->tx_dropped += queue->stats.tx_dropped;
6213         }
6214 }
6215 EXPORT_SYMBOL_GPL(qeth_get_stats64);
6216
6217 u16 qeth_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
6218                           u8 cast_type, struct net_device *sb_dev)
6219 {
6220         if (cast_type != RTN_UNICAST)
6221                 return QETH_IQD_MCAST_TXQ;
6222         return QETH_IQD_MIN_UCAST_TXQ;
6223 }
6224 EXPORT_SYMBOL_GPL(qeth_iqd_select_queue);
6225
6226 int qeth_open(struct net_device *dev)
6227 {
6228         struct qeth_card *card = dev->ml_priv;
6229
6230         QETH_CARD_TEXT(card, 4, "qethopen");
6231
6232         if (qdio_stop_irq(CARD_DDEV(card), 0) < 0)
6233                 return -EIO;
6234
6235         card->data.state = CH_STATE_UP;
6236         netif_tx_start_all_queues(dev);
6237
6238         napi_enable(&card->napi);
6239         local_bh_disable();
6240         napi_schedule(&card->napi);
6241         if (IS_IQD(card)) {
6242                 struct qeth_qdio_out_q *queue;
6243                 unsigned int i;
6244
6245                 qeth_for_each_output_queue(card, queue, i) {
6246                         netif_tx_napi_add(dev, &queue->napi, qeth_tx_poll,
6247                                           QETH_NAPI_WEIGHT);
6248                         napi_enable(&queue->napi);
6249                         napi_schedule(&queue->napi);
6250                 }
6251         }
6252         /* kick-start the NAPI softirq: */
6253         local_bh_enable();
6254         return 0;
6255 }
6256 EXPORT_SYMBOL_GPL(qeth_open);
6257
6258 int qeth_stop(struct net_device *dev)
6259 {
6260         struct qeth_card *card = dev->ml_priv;
6261
6262         QETH_CARD_TEXT(card, 4, "qethstop");
6263         if (IS_IQD(card)) {
6264                 struct qeth_qdio_out_q *queue;
6265                 unsigned int i;
6266
6267                 /* Quiesce the NAPI instances: */
6268                 qeth_for_each_output_queue(card, queue, i) {
6269                         napi_disable(&queue->napi);
6270                         del_timer_sync(&queue->timer);
6271                 }
6272
6273                 /* Stop .ndo_start_xmit, might still access queue->napi. */
6274                 netif_tx_disable(dev);
6275
6276                 /* Queues may get re-allocated, so remove the NAPIs here. */
6277                 qeth_for_each_output_queue(card, queue, i)
6278                         netif_napi_del(&queue->napi);
6279         } else {
6280                 netif_tx_disable(dev);
6281         }
6282
6283         napi_disable(&card->napi);
6284         return 0;
6285 }
6286 EXPORT_SYMBOL_GPL(qeth_stop);
6287
6288 static int __init qeth_core_init(void)
6289 {
6290         int rc;
6291
6292         pr_info("loading core functions\n");
6293
6294         rc = qeth_register_dbf_views();
6295         if (rc)
6296                 goto dbf_err;
6297         qeth_core_root_dev = root_device_register("qeth");
6298         rc = PTR_ERR_OR_ZERO(qeth_core_root_dev);
6299         if (rc)
6300                 goto register_err;
6301         qeth_core_header_cache =
6302                 kmem_cache_create("qeth_hdr", QETH_HDR_CACHE_OBJ_SIZE,
6303                                   roundup_pow_of_two(QETH_HDR_CACHE_OBJ_SIZE),
6304                                   0, NULL);
6305         if (!qeth_core_header_cache) {
6306                 rc = -ENOMEM;
6307                 goto slab_err;
6308         }
6309         qeth_qdio_outbuf_cache = kmem_cache_create("qeth_buf",
6310                         sizeof(struct qeth_qdio_out_buffer), 0, 0, NULL);
6311         if (!qeth_qdio_outbuf_cache) {
6312                 rc = -ENOMEM;
6313                 goto cqslab_err;
6314         }
6315         rc = ccw_driver_register(&qeth_ccw_driver);
6316         if (rc)
6317                 goto ccw_err;
6318         rc = ccwgroup_driver_register(&qeth_core_ccwgroup_driver);
6319         if (rc)
6320                 goto ccwgroup_err;
6321
6322         return 0;
6323
6324 ccwgroup_err:
6325         ccw_driver_unregister(&qeth_ccw_driver);
6326 ccw_err:
6327         kmem_cache_destroy(qeth_qdio_outbuf_cache);
6328 cqslab_err:
6329         kmem_cache_destroy(qeth_core_header_cache);
6330 slab_err:
6331         root_device_unregister(qeth_core_root_dev);
6332 register_err:
6333         qeth_unregister_dbf_views();
6334 dbf_err:
6335         pr_err("Initializing the qeth device driver failed\n");
6336         return rc;
6337 }
6338
6339 static void __exit qeth_core_exit(void)
6340 {
6341         qeth_clear_dbf_list();
6342         ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver);
6343         ccw_driver_unregister(&qeth_ccw_driver);
6344         kmem_cache_destroy(qeth_qdio_outbuf_cache);
6345         kmem_cache_destroy(qeth_core_header_cache);
6346         root_device_unregister(qeth_core_root_dev);
6347         qeth_unregister_dbf_views();
6348         pr_info("core functions removed\n");
6349 }
6350
6351 module_init(qeth_core_init);
6352 module_exit(qeth_core_exit);
6353 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
6354 MODULE_DESCRIPTION("qeth core functions");
6355 MODULE_LICENSE("GPL");