drivers/s390/net/qeth_core_main.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *    Copyright IBM Corp. 2007, 2009
   4  *    Author(s): Utz Bacher <[email protected]>,
   5  *               Frank Pavlic <[email protected]>,
   6  *               Thomas Spatzier <[email protected]>,
   7  *               Frank Blaschka <[email protected]>
   8  */
   9
  10 #define KMSG_COMPONENT "qeth"
  11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  12
  13 #include <linux/compat.h>
  14 #include <linux/module.h>
  15 #include <linux/moduleparam.h>
  16 #include <linux/string.h>
  17 #include <linux/errno.h>
  18 #include <linux/kernel.h>
  19 #include <linux/log2.h>
  20 #include <linux/ip.h>
  21 #include <linux/tcp.h>
  22 #include <linux/mii.h>
  23 #include <linux/mm.h>
  24 #include <linux/kthread.h>
  25 #include <linux/slab.h>
  26 #include <linux/if_vlan.h>
  27 #include <linux/netdevice.h>
  28 #include <linux/netdev_features.h>
  29 #include <linux/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         return rc;
1517 }
1518 EXPORT_SYMBOL_GPL(qeth_qdio_clear_card);
1519
1520 static enum qeth_discipline_id qeth_vm_detect_layer(struct qeth_card *card)
1521 {
1522         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1523         struct diag26c_vnic_resp *response = NULL;
1524         struct diag26c_vnic_req *request = NULL;
1525         struct ccw_dev_id id;
1526         char userid[80];
1527         int rc = 0;
1528
1529         QETH_CARD_TEXT(card, 2, "vmlayer");
1530
1531         cpcmd("QUERY USERID", userid, sizeof(userid), &rc);
1532         if (rc)
1533                 goto out;
1534
1535         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
1536         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
1537         if (!request || !response) {
1538                 rc = -ENOMEM;
1539                 goto out;
1540         }
1541
1542         ccw_device_get_id(CARD_RDEV(card), &id);
1543         request->resp_buf_len = sizeof(*response);
1544         request->resp_version = DIAG26C_VERSION6_VM65918;
1545         request->req_format = DIAG26C_VNIC_INFO;
1546         ASCEBC(userid, 8);
1547         memcpy(&request->sys_name, userid, 8);
1548         request->devno = id.devno;
1549
1550         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1551         rc = diag26c(request, response, DIAG26C_PORT_VNIC);
1552         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1553         if (rc)
1554                 goto out;
1555         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
1556
1557         if (request->resp_buf_len < sizeof(*response) ||
1558             response->version != request->resp_version) {
1559                 rc = -EIO;
1560                 goto out;
1561         }
1562
1563         if (response->protocol == VNIC_INFO_PROT_L2)
1564                 disc = QETH_DISCIPLINE_LAYER2;
1565         else if (response->protocol == VNIC_INFO_PROT_L3)
1566                 disc = QETH_DISCIPLINE_LAYER3;
1567
1568 out:
1569         kfree(response);
1570         kfree(request);
1571         if (rc)
1572                 QETH_CARD_TEXT_(card, 2, "err%x", rc);
1573         return disc;
1574 }
1575
1576 /* Determine whether the device requires a specific layer discipline */
1577 static enum qeth_discipline_id qeth_enforce_discipline(struct qeth_card *card)
1578 {
1579         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1580
1581         if (IS_OSM(card) || IS_OSN(card))
1582                 disc = QETH_DISCIPLINE_LAYER2;
1583         else if (IS_VM_NIC(card))
1584                 disc = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
1585                                       qeth_vm_detect_layer(card);
1586
1587         switch (disc) {
1588         case QETH_DISCIPLINE_LAYER2:
1589                 QETH_CARD_TEXT(card, 3, "force l2");
1590                 break;
1591         case QETH_DISCIPLINE_LAYER3:
1592                 QETH_CARD_TEXT(card, 3, "force l3");
1593                 break;
1594         default:
1595                 QETH_CARD_TEXT(card, 3, "force no");
1596         }
1597
1598         return disc;
1599 }
1600
1601 static void qeth_set_blkt_defaults(struct qeth_card *card)
1602 {
1603         QETH_CARD_TEXT(card, 2, "cfgblkt");
1604
1605         if (card->info.use_v1_blkt) {
1606                 card->info.blkt.time_total = 0;
1607                 card->info.blkt.inter_packet = 0;
1608                 card->info.blkt.inter_packet_jumbo = 0;
1609         } else {
1610                 card->info.blkt.time_total = 250;
1611                 card->info.blkt.inter_packet = 5;
1612                 card->info.blkt.inter_packet_jumbo = 15;
1613         }
1614 }
1615
1616 static void qeth_init_tokens(struct qeth_card *card)
1617 {
1618         card->token.issuer_rm_w = 0x00010103UL;
1619         card->token.cm_filter_w = 0x00010108UL;
1620         card->token.cm_connection_w = 0x0001010aUL;
1621         card->token.ulp_filter_w = 0x0001010bUL;
1622         card->token.ulp_connection_w = 0x0001010dUL;
1623 }
1624
1625 static void qeth_init_func_level(struct qeth_card *card)
1626 {
1627         switch (card->info.type) {
1628         case QETH_CARD_TYPE_IQD:
1629                 card->info.func_level = QETH_IDX_FUNC_LEVEL_IQD;
1630                 break;
1631         case QETH_CARD_TYPE_OSD:
1632         case QETH_CARD_TYPE_OSN:
1633                 card->info.func_level = QETH_IDX_FUNC_LEVEL_OSD;
1634                 break;
1635         default:
1636                 break;
1637         }
1638 }
1639
1640 static void qeth_idx_finalize_cmd(struct qeth_card *card,
1641                                   struct qeth_cmd_buffer *iob)
1642 {
1643         memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data), &card->seqno.trans_hdr,
1644                QETH_SEQ_NO_LENGTH);
1645         if (iob->channel == &card->write)
1646                 card->seqno.trans_hdr++;
1647 }
1648
1649 static int qeth_peer_func_level(int level)
1650 {
1651         if ((level & 0xff) == 8)
1652                 return (level & 0xff) + 0x400;
1653         if (((level >> 8) & 3) == 1)
1654                 return (level & 0xff) + 0x200;
1655         return level;
1656 }
1657
1658 static void qeth_mpc_finalize_cmd(struct qeth_card *card,
1659                                   struct qeth_cmd_buffer *iob)
1660 {
1661         qeth_idx_finalize_cmd(card, iob);
1662
1663         memcpy(QETH_PDU_HEADER_SEQ_NO(iob->data),
1664                &card->seqno.pdu_hdr, QETH_SEQ_NO_LENGTH);
1665         card->seqno.pdu_hdr++;
1666         memcpy(QETH_PDU_HEADER_ACK_SEQ_NO(iob->data),
1667                &card->seqno.pdu_hdr_ack, QETH_SEQ_NO_LENGTH);
1668
1669         iob->callback = qeth_release_buffer_cb;
1670 }
1671
1672 static struct qeth_cmd_buffer *qeth_mpc_alloc_cmd(struct qeth_card *card,
1673                                                   void *data,
1674                                                   unsigned int data_length)
1675 {
1676         struct qeth_cmd_buffer *iob;
1677
1678         iob = qeth_alloc_cmd(&card->write, data_length, 1, QETH_TIMEOUT);
1679         if (!iob)
1680                 return NULL;
1681
1682         memcpy(iob->data, data, data_length);
1683         qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, data_length,
1684                        iob->data);
1685         iob->finalize = qeth_mpc_finalize_cmd;
1686         return iob;
1687 }
1688
1689 /**
1690  * qeth_send_control_data() -   send control command to the card
1691  * @card:                       qeth_card structure pointer
1692  * @iob:                        qeth_cmd_buffer pointer
1693  * @reply_cb:                   callback function pointer
1694  * @cb_card:                    pointer to the qeth_card structure
1695  * @cb_reply:                   pointer to the qeth_reply structure
1696  * @cb_cmd:                     pointer to the original iob for non-IPA
1697  *                              commands, or to the qeth_ipa_cmd structure
1698  *                              for the IPA commands.
1699  * @reply_param:                private pointer passed to the callback
1700  *
1701  * Callback function gets called one or more times, with cb_cmd
1702  * pointing to the response returned by the hardware. Callback
1703  * function must return
1704  *   > 0 if more reply blocks are expected,
1705  *     0 if the last or only reply block is received, and
1706  *   < 0 on error.
1707  * Callback function can get the value of the reply_param pointer from the
1708  * field 'param' of the structure qeth_reply.
1709  */
1710
1711 static int qeth_send_control_data(struct qeth_card *card,
1712                                   struct qeth_cmd_buffer *iob,
1713                                   int (*reply_cb)(struct qeth_card *cb_card,
1714                                                   struct qeth_reply *cb_reply,
1715                                                   unsigned long cb_cmd),
1716                                   void *reply_param)
1717 {
1718         struct qeth_channel *channel = iob->channel;
1719         struct qeth_reply *reply = &iob->reply;
1720         long timeout = iob->timeout;
1721         int rc;
1722
1723         QETH_CARD_TEXT(card, 2, "sendctl");
1724
1725         reply->callback = reply_cb;
1726         reply->param = reply_param;
1727
1728         timeout = wait_event_interruptible_timeout(card->wait_q,
1729                                                    qeth_trylock_channel(channel),
1730                                                    timeout);
1731         if (timeout <= 0) {
1732                 qeth_put_cmd(iob);
1733                 return (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
1734         }
1735
1736         if (iob->finalize)
1737                 iob->finalize(card, iob);
1738         QETH_DBF_HEX(CTRL, 2, iob->data, min(iob->length, QETH_DBF_CTRL_LEN));
1739
1740         qeth_enqueue_cmd(card, iob);
1741
1742         /* This pairs with iob->callback, and keeps the iob alive after IO: */
1743         qeth_get_cmd(iob);
1744
1745         QETH_CARD_TEXT(card, 6, "noirqpnd");
1746         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1747         rc = ccw_device_start_timeout(channel->ccwdev, __ccw_from_cmd(iob),
1748                                       (addr_t) iob, 0, 0, timeout);
1749         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1750         if (rc) {
1751                 QETH_DBF_MESSAGE(2, "qeth_send_control_data on device %x: ccw_device_start rc = %i\n",
1752                                  CARD_DEVID(card), rc);
1753                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
1754                 qeth_dequeue_cmd(card, iob);
1755                 qeth_put_cmd(iob);
1756                 atomic_set(&channel->irq_pending, 0);
1757                 wake_up(&card->wait_q);
1758                 goto out;
1759         }
1760
1761         timeout = wait_for_completion_interruptible_timeout(&iob->done,
1762                                                             timeout);
1763         if (timeout <= 0)
1764                 rc = (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
1765
1766         qeth_dequeue_cmd(card, iob);
1767
1768         if (reply_cb) {
1769                 /* Wait until the callback for a late reply has completed: */
1770                 spin_lock_irq(&iob->lock);
1771                 if (rc)
1772                         /* Zap any callback that's still pending: */
1773                         iob->rc = rc;
1774                 spin_unlock_irq(&iob->lock);
1775         }
1776
1777         if (!rc)
1778                 rc = iob->rc;
1779
1780 out:
1781         qeth_put_cmd(iob);
1782         return rc;
1783 }
1784
1785 struct qeth_node_desc {
1786         struct node_descriptor nd1;
1787         struct node_descriptor nd2;
1788         struct node_descriptor nd3;
1789 };
1790
1791 static void qeth_read_conf_data_cb(struct qeth_card *card,
1792                                    struct qeth_cmd_buffer *iob,
1793                                    unsigned int data_length)
1794 {
1795         struct qeth_node_desc *nd = (struct qeth_node_desc *) iob->data;
1796         int rc = 0;
1797         u8 *tag;
1798
1799         QETH_CARD_TEXT(card, 2, "cfgunit");
1800
1801         if (data_length < sizeof(*nd)) {
1802                 rc = -EINVAL;
1803                 goto out;
1804         }
1805
1806         card->info.is_vm_nic = nd->nd1.plant[0] == _ascebc['V'] &&
1807                                nd->nd1.plant[1] == _ascebc['M'];
1808         tag = (u8 *)&nd->nd1.tag;
1809         card->info.chpid = tag[0];
1810         card->info.unit_addr2 = tag[1];
1811
1812         tag = (u8 *)&nd->nd2.tag;
1813         card->info.cula = tag[1];
1814
1815         card->info.use_v1_blkt = nd->nd3.model[0] == 0xF0 &&
1816                                  nd->nd3.model[1] == 0xF0 &&
1817                                  nd->nd3.model[2] >= 0xF1 &&
1818                                  nd->nd3.model[2] <= 0xF4;
1819
1820 out:
1821         qeth_notify_cmd(iob, rc);
1822         qeth_put_cmd(iob);
1823 }
1824
1825 static int qeth_read_conf_data(struct qeth_card *card)
1826 {
1827         struct qeth_channel *channel = &card->data;
1828         struct qeth_cmd_buffer *iob;
1829         struct ciw *ciw;
1830
1831         /* scan for RCD command in extended SenseID data */
1832         ciw = ccw_device_get_ciw(channel->ccwdev, CIW_TYPE_RCD);
1833         if (!ciw || ciw->cmd == 0)
1834                 return -EOPNOTSUPP;
1835         if (ciw->count < sizeof(struct qeth_node_desc))
1836                 return -EINVAL;
1837
1838         iob = qeth_alloc_cmd(channel, ciw->count, 1, QETH_RCD_TIMEOUT);
1839         if (!iob)
1840                 return -ENOMEM;
1841
1842         iob->callback = qeth_read_conf_data_cb;
1843         qeth_setup_ccw(__ccw_from_cmd(iob), ciw->cmd, 0, iob->length,
1844                        iob->data);
1845
1846         return qeth_send_control_data(card, iob, NULL, NULL);
1847 }
1848
1849 static int qeth_idx_check_activate_response(struct qeth_card *card,
1850                                             struct qeth_channel *channel,
1851                                             struct qeth_cmd_buffer *iob)
1852 {
1853         int rc;
1854
1855         rc = qeth_check_idx_response(card, iob->data);
1856         if (rc)
1857                 return rc;
1858
1859         if (QETH_IS_IDX_ACT_POS_REPLY(iob->data))
1860                 return 0;
1861
1862         /* negative reply: */
1863         QETH_CARD_TEXT_(card, 2, "idxneg%c",
1864                         QETH_IDX_ACT_CAUSE_CODE(iob->data));
1865
1866         switch (QETH_IDX_ACT_CAUSE_CODE(iob->data)) {
1867         case QETH_IDX_ACT_ERR_EXCL:
1868                 dev_err(&channel->ccwdev->dev,
1869                         "The adapter is used exclusively by another host\n");
1870                 return -EBUSY;
1871         case QETH_IDX_ACT_ERR_AUTH:
1872         case QETH_IDX_ACT_ERR_AUTH_USER:
1873                 dev_err(&channel->ccwdev->dev,
1874                         "Setting the device online failed because of insufficient authorization\n");
1875                 return -EPERM;
1876         default:
1877                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: negative reply\n",
1878                                  CCW_DEVID(channel->ccwdev));
1879                 return -EIO;
1880         }
1881 }
1882
1883 static void qeth_idx_activate_read_channel_cb(struct qeth_card *card,
1884                                               struct qeth_cmd_buffer *iob,
1885                                               unsigned int data_length)
1886 {
1887         struct qeth_channel *channel = iob->channel;
1888         u16 peer_level;
1889         int rc;
1890
1891         QETH_CARD_TEXT(card, 2, "idxrdcb");
1892
1893         rc = qeth_idx_check_activate_response(card, channel, iob);
1894         if (rc)
1895                 goto out;
1896
1897         memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
1898         if (peer_level != qeth_peer_func_level(card->info.func_level)) {
1899                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
1900                                  CCW_DEVID(channel->ccwdev),
1901                                  card->info.func_level, peer_level);
1902                 rc = -EINVAL;
1903                 goto out;
1904         }
1905
1906         memcpy(&card->token.issuer_rm_r,
1907                QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
1908                QETH_MPC_TOKEN_LENGTH);
1909         memcpy(&card->info.mcl_level[0],
1910                QETH_IDX_REPLY_LEVEL(iob->data), QETH_MCL_LENGTH);
1911
1912 out:
1913         qeth_notify_cmd(iob, rc);
1914         qeth_put_cmd(iob);
1915 }
1916
1917 static void qeth_idx_activate_write_channel_cb(struct qeth_card *card,
1918                                                struct qeth_cmd_buffer *iob,
1919                                                unsigned int data_length)
1920 {
1921         struct qeth_channel *channel = iob->channel;
1922         u16 peer_level;
1923         int rc;
1924
1925         QETH_CARD_TEXT(card, 2, "idxwrcb");
1926
1927         rc = qeth_idx_check_activate_response(card, channel, iob);
1928         if (rc)
1929                 goto out;
1930
1931         memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
1932         if ((peer_level & ~0x0100) !=
1933             qeth_peer_func_level(card->info.func_level)) {
1934                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
1935                                  CCW_DEVID(channel->ccwdev),
1936                                  card->info.func_level, peer_level);
1937                 rc = -EINVAL;
1938         }
1939
1940 out:
1941         qeth_notify_cmd(iob, rc);
1942         qeth_put_cmd(iob);
1943 }
1944
1945 static void qeth_idx_setup_activate_cmd(struct qeth_card *card,
1946                                         struct qeth_cmd_buffer *iob)
1947 {
1948         u16 addr = (card->info.cula << 8) + card->info.unit_addr2;
1949         u8 port = ((u8)card->dev->dev_port) | 0x80;
1950         struct ccw1 *ccw = __ccw_from_cmd(iob);
1951         struct ccw_dev_id dev_id;
1952
1953         qeth_setup_ccw(&ccw[0], CCW_CMD_WRITE, CCW_FLAG_CC, IDX_ACTIVATE_SIZE,
1954                        iob->data);
1955         qeth_setup_ccw(&ccw[1], CCW_CMD_READ, 0, iob->length, iob->data);
1956         ccw_device_get_id(CARD_DDEV(card), &dev_id);
1957         iob->finalize = qeth_idx_finalize_cmd;
1958
1959         memcpy(QETH_IDX_ACT_PNO(iob->data), &port, 1);
1960         memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
1961                &card->token.issuer_rm_w, QETH_MPC_TOKEN_LENGTH);
1962         memcpy(QETH_IDX_ACT_FUNC_LEVEL(iob->data),
1963                &card->info.func_level, 2);
1964         memcpy(QETH_IDX_ACT_QDIO_DEV_CUA(iob->data), &dev_id.devno, 2);
1965         memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &addr, 2);
1966 }
1967
1968 static int qeth_idx_activate_read_channel(struct qeth_card *card)
1969 {
1970         struct qeth_channel *channel = &card->read;
1971         struct qeth_cmd_buffer *iob;
1972         int rc;
1973
1974         QETH_CARD_TEXT(card, 2, "idxread");
1975
1976         iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
1977         if (!iob)
1978                 return -ENOMEM;
1979
1980         memcpy(iob->data, IDX_ACTIVATE_READ, IDX_ACTIVATE_SIZE);
1981         qeth_idx_setup_activate_cmd(card, iob);
1982         iob->callback = qeth_idx_activate_read_channel_cb;
1983
1984         rc = qeth_send_control_data(card, iob, NULL, NULL);
1985         if (rc)
1986                 return rc;
1987
1988         channel->state = CH_STATE_UP;
1989         return 0;
1990 }
1991
1992 static int qeth_idx_activate_write_channel(struct qeth_card *card)
1993 {
1994         struct qeth_channel *channel = &card->write;
1995         struct qeth_cmd_buffer *iob;
1996         int rc;
1997
1998         QETH_CARD_TEXT(card, 2, "idxwrite");
1999
2000         iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
2001         if (!iob)
2002                 return -ENOMEM;
2003
2004         memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE);
2005         qeth_idx_setup_activate_cmd(card, iob);
2006         iob->callback = qeth_idx_activate_write_channel_cb;
2007
2008         rc = qeth_send_control_data(card, iob, NULL, NULL);
2009         if (rc)
2010                 return rc;
2011
2012         channel->state = CH_STATE_UP;
2013         return 0;
2014 }
2015
2016 static int qeth_cm_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2017                 unsigned long data)
2018 {
2019         struct qeth_cmd_buffer *iob;
2020
2021         QETH_CARD_TEXT(card, 2, "cmenblcb");
2022
2023         iob = (struct qeth_cmd_buffer *) data;
2024         memcpy(&card->token.cm_filter_r,
2025                QETH_CM_ENABLE_RESP_FILTER_TOKEN(iob->data),
2026                QETH_MPC_TOKEN_LENGTH);
2027         return 0;
2028 }
2029
2030 static int qeth_cm_enable(struct qeth_card *card)
2031 {
2032         struct qeth_cmd_buffer *iob;
2033
2034         QETH_CARD_TEXT(card, 2, "cmenable");
2035
2036         iob = qeth_mpc_alloc_cmd(card, CM_ENABLE, CM_ENABLE_SIZE);
2037         if (!iob)
2038                 return -ENOMEM;
2039
2040         memcpy(QETH_CM_ENABLE_ISSUER_RM_TOKEN(iob->data),
2041                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2042         memcpy(QETH_CM_ENABLE_FILTER_TOKEN(iob->data),
2043                &card->token.cm_filter_w, QETH_MPC_TOKEN_LENGTH);
2044
2045         return qeth_send_control_data(card, iob, qeth_cm_enable_cb, NULL);
2046 }
2047
2048 static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2049                 unsigned long data)
2050 {
2051         struct qeth_cmd_buffer *iob;
2052
2053         QETH_CARD_TEXT(card, 2, "cmsetpcb");
2054
2055         iob = (struct qeth_cmd_buffer *) data;
2056         memcpy(&card->token.cm_connection_r,
2057                QETH_CM_SETUP_RESP_DEST_ADDR(iob->data),
2058                QETH_MPC_TOKEN_LENGTH);
2059         return 0;
2060 }
2061
2062 static int qeth_cm_setup(struct qeth_card *card)
2063 {
2064         struct qeth_cmd_buffer *iob;
2065
2066         QETH_CARD_TEXT(card, 2, "cmsetup");
2067
2068         iob = qeth_mpc_alloc_cmd(card, CM_SETUP, CM_SETUP_SIZE);
2069         if (!iob)
2070                 return -ENOMEM;
2071
2072         memcpy(QETH_CM_SETUP_DEST_ADDR(iob->data),
2073                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2074         memcpy(QETH_CM_SETUP_CONNECTION_TOKEN(iob->data),
2075                &card->token.cm_connection_w, QETH_MPC_TOKEN_LENGTH);
2076         memcpy(QETH_CM_SETUP_FILTER_TOKEN(iob->data),
2077                &card->token.cm_filter_r, QETH_MPC_TOKEN_LENGTH);
2078         return qeth_send_control_data(card, iob, qeth_cm_setup_cb, NULL);
2079 }
2080
2081 static int qeth_update_max_mtu(struct qeth_card *card, unsigned int max_mtu)
2082 {
2083         struct net_device *dev = card->dev;
2084         unsigned int new_mtu;
2085
2086         if (!max_mtu) {
2087                 /* IQD needs accurate max MTU to set up its RX buffers: */
2088                 if (IS_IQD(card))
2089                         return -EINVAL;
2090                 /* tolerate quirky HW: */
2091                 max_mtu = ETH_MAX_MTU;
2092         }
2093
2094         rtnl_lock();
2095         if (IS_IQD(card)) {
2096                 /* move any device with default MTU to new max MTU: */
2097                 new_mtu = (dev->mtu == dev->max_mtu) ? max_mtu : dev->mtu;
2098
2099                 /* adjust RX buffer size to new max MTU: */
2100                 card->qdio.in_buf_size = max_mtu + 2 * PAGE_SIZE;
2101                 if (dev->max_mtu && dev->max_mtu != max_mtu)
2102                         qeth_free_qdio_queues(card);
2103         } else {
2104                 if (dev->mtu)
2105                         new_mtu = dev->mtu;
2106                 /* default MTUs for first setup: */
2107                 else if (IS_LAYER2(card))
2108                         new_mtu = ETH_DATA_LEN;
2109                 else
2110                         new_mtu = ETH_DATA_LEN - 8; /* allow for LLC + SNAP */
2111         }
2112
2113         dev->max_mtu = max_mtu;
2114         dev->mtu = min(new_mtu, max_mtu);
2115         rtnl_unlock();
2116         return 0;
2117 }
2118
2119 static int qeth_get_mtu_outof_framesize(int framesize)
2120 {
2121         switch (framesize) {
2122         case 0x4000:
2123                 return 8192;
2124         case 0x6000:
2125                 return 16384;
2126         case 0xa000:
2127                 return 32768;
2128         case 0xffff:
2129                 return 57344;
2130         default:
2131                 return 0;
2132         }
2133 }
2134
2135 static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2136                 unsigned long data)
2137 {
2138         __u16 mtu, framesize;
2139         __u16 len;
2140         __u8 link_type;
2141         struct qeth_cmd_buffer *iob;
2142
2143         QETH_CARD_TEXT(card, 2, "ulpenacb");
2144
2145         iob = (struct qeth_cmd_buffer *) data;
2146         memcpy(&card->token.ulp_filter_r,
2147                QETH_ULP_ENABLE_RESP_FILTER_TOKEN(iob->data),
2148                QETH_MPC_TOKEN_LENGTH);
2149         if (IS_IQD(card)) {
2150                 memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2);
2151                 mtu = qeth_get_mtu_outof_framesize(framesize);
2152         } else {
2153                 mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data);
2154         }
2155         *(u16 *)reply->param = mtu;
2156
2157         memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2);
2158         if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) {
2159                 memcpy(&link_type,
2160                        QETH_ULP_ENABLE_RESP_LINK_TYPE(iob->data), 1);
2161                 card->info.link_type = link_type;
2162         } else
2163                 card->info.link_type = 0;
2164         QETH_CARD_TEXT_(card, 2, "link%d", card->info.link_type);
2165         return 0;
2166 }
2167
2168 static u8 qeth_mpc_select_prot_type(struct qeth_card *card)
2169 {
2170         if (IS_OSN(card))
2171                 return QETH_PROT_OSN2;
2172         return IS_LAYER2(card) ? QETH_PROT_LAYER2 : QETH_PROT_TCPIP;
2173 }
2174
2175 static int qeth_ulp_enable(struct qeth_card *card)
2176 {
2177         u8 prot_type = qeth_mpc_select_prot_type(card);
2178         struct qeth_cmd_buffer *iob;
2179         u16 max_mtu;
2180         int rc;
2181
2182         QETH_CARD_TEXT(card, 2, "ulpenabl");
2183
2184         iob = qeth_mpc_alloc_cmd(card, ULP_ENABLE, ULP_ENABLE_SIZE);
2185         if (!iob)
2186                 return -ENOMEM;
2187
2188         *(QETH_ULP_ENABLE_LINKNUM(iob->data)) = (u8) card->dev->dev_port;
2189         memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1);
2190         memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data),
2191                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2192         memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data),
2193                &card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH);
2194         rc = qeth_send_control_data(card, iob, qeth_ulp_enable_cb, &max_mtu);
2195         if (rc)
2196                 return rc;
2197         return qeth_update_max_mtu(card, max_mtu);
2198 }
2199
2200 static int qeth_ulp_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2201                 unsigned long data)
2202 {
2203         struct qeth_cmd_buffer *iob;
2204
2205         QETH_CARD_TEXT(card, 2, "ulpstpcb");
2206
2207         iob = (struct qeth_cmd_buffer *) data;
2208         memcpy(&card->token.ulp_connection_r,
2209                QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2210                QETH_MPC_TOKEN_LENGTH);
2211         if (!strncmp("00S", QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2212                      3)) {
2213                 QETH_CARD_TEXT(card, 2, "olmlimit");
2214                 dev_err(&card->gdev->dev, "A connection could not be "
2215                         "established because of an OLM limit\n");
2216                 return -EMLINK;
2217         }
2218         return 0;
2219 }
2220
2221 static int qeth_ulp_setup(struct qeth_card *card)
2222 {
2223         __u16 temp;
2224         struct qeth_cmd_buffer *iob;
2225         struct ccw_dev_id dev_id;
2226
2227         QETH_CARD_TEXT(card, 2, "ulpsetup");
2228
2229         iob = qeth_mpc_alloc_cmd(card, ULP_SETUP, ULP_SETUP_SIZE);
2230         if (!iob)
2231                 return -ENOMEM;
2232
2233         memcpy(QETH_ULP_SETUP_DEST_ADDR(iob->data),
2234                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2235         memcpy(QETH_ULP_SETUP_CONNECTION_TOKEN(iob->data),
2236                &card->token.ulp_connection_w, QETH_MPC_TOKEN_LENGTH);
2237         memcpy(QETH_ULP_SETUP_FILTER_TOKEN(iob->data),
2238                &card->token.ulp_filter_r, QETH_MPC_TOKEN_LENGTH);
2239
2240         ccw_device_get_id(CARD_DDEV(card), &dev_id);
2241         memcpy(QETH_ULP_SETUP_CUA(iob->data), &dev_id.devno, 2);
2242         temp = (card->info.cula << 8) + card->info.unit_addr2;
2243         memcpy(QETH_ULP_SETUP_REAL_DEVADDR(iob->data), &temp, 2);
2244         return qeth_send_control_data(card, iob, qeth_ulp_setup_cb, NULL);
2245 }
2246
2247 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *q, int bidx)
2248 {
2249         struct qeth_qdio_out_buffer *newbuf;
2250
2251         newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, GFP_ATOMIC);
2252         if (!newbuf)
2253                 return -ENOMEM;
2254
2255         newbuf->buffer = q->qdio_bufs[bidx];
2256         skb_queue_head_init(&newbuf->skb_list);
2257         lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key);
2258         newbuf->q = q;
2259         newbuf->next_pending = q->bufs[bidx];
2260         atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY);
2261         q->bufs[bidx] = newbuf;
2262         return 0;
2263 }
2264
2265 static void qeth_free_output_queue(struct qeth_qdio_out_q *q)
2266 {
2267         if (!q)
2268                 return;
2269
2270         qeth_drain_output_queue(q, true);
2271         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2272         kfree(q);
2273 }
2274
2275 static struct qeth_qdio_out_q *qeth_alloc_output_queue(void)
2276 {
2277         struct qeth_qdio_out_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
2278
2279         if (!q)
2280                 return NULL;
2281
2282         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
2283                 kfree(q);
2284                 return NULL;
2285         }
2286         return q;
2287 }
2288
2289 static void qeth_tx_completion_timer(struct timer_list *timer)
2290 {
2291         struct qeth_qdio_out_q *queue = from_timer(queue, timer, timer);
2292
2293         napi_schedule(&queue->napi);
2294         QETH_TXQ_STAT_INC(queue, completion_timer);
2295 }
2296
2297 static int qeth_alloc_qdio_queues(struct qeth_card *card)
2298 {
2299         int i, j;
2300
2301         QETH_CARD_TEXT(card, 2, "allcqdbf");
2302
2303         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED,
2304                 QETH_QDIO_ALLOCATED) != QETH_QDIO_UNINITIALIZED)
2305                 return 0;
2306
2307         QETH_CARD_TEXT(card, 2, "inq");
2308         card->qdio.in_q = qeth_alloc_qdio_queue();
2309         if (!card->qdio.in_q)
2310                 goto out_nomem;
2311
2312         /* inbound buffer pool */
2313         if (qeth_alloc_buffer_pool(card))
2314                 goto out_freeinq;
2315
2316         /* outbound */
2317         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2318                 struct qeth_qdio_out_q *queue;
2319
2320                 queue = qeth_alloc_output_queue();
2321                 if (!queue)
2322                         goto out_freeoutq;
2323                 QETH_CARD_TEXT_(card, 2, "outq %i", i);
2324                 QETH_CARD_HEX(card, 2, &queue, sizeof(void *));
2325                 card->qdio.out_qs[i] = queue;
2326                 queue->card = card;
2327                 queue->queue_no = i;
2328                 timer_setup(&queue->timer, qeth_tx_completion_timer, 0);
2329
2330                 /* give outbound qeth_qdio_buffers their qdio_buffers */
2331                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2332                         WARN_ON(queue->bufs[j]);
2333                         if (qeth_init_qdio_out_buf(queue, j))
2334                                 goto out_freeoutqbufs;
2335                 }
2336         }
2337
2338         /* completion */
2339         if (qeth_alloc_cq(card))
2340                 goto out_freeoutq;
2341
2342         return 0;
2343
2344 out_freeoutqbufs:
2345         while (j > 0) {
2346                 --j;
2347                 kmem_cache_free(qeth_qdio_outbuf_cache,
2348                                 card->qdio.out_qs[i]->bufs[j]);
2349                 card->qdio.out_qs[i]->bufs[j] = NULL;
2350         }
2351 out_freeoutq:
2352         while (i > 0) {
2353                 qeth_free_output_queue(card->qdio.out_qs[--i]);
2354                 card->qdio.out_qs[i] = NULL;
2355         }
2356         qeth_free_buffer_pool(card);
2357 out_freeinq:
2358         qeth_free_qdio_queue(card->qdio.in_q);
2359         card->qdio.in_q = NULL;
2360 out_nomem:
2361         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
2362         return -ENOMEM;
2363 }
2364
2365 static void qeth_free_qdio_queues(struct qeth_card *card)
2366 {
2367         int i, j;
2368
2369         if (atomic_xchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED) ==
2370                 QETH_QDIO_UNINITIALIZED)
2371                 return;
2372
2373         qeth_free_cq(card);
2374         cancel_delayed_work_sync(&card->buffer_reclaim_work);
2375         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2376                 if (card->qdio.in_q->bufs[j].rx_skb)
2377                         dev_kfree_skb_any(card->qdio.in_q->bufs[j].rx_skb);
2378         }
2379         qeth_free_qdio_queue(card->qdio.in_q);
2380         card->qdio.in_q = NULL;
2381         /* inbound buffer pool */
2382         qeth_free_buffer_pool(card);
2383         /* free outbound qdio_qs */
2384         for (i = 0; i < card->qdio.no_out_queues; i++) {
2385                 qeth_free_output_queue(card->qdio.out_qs[i]);
2386                 card->qdio.out_qs[i] = NULL;
2387         }
2388 }
2389
2390 static void qeth_create_qib_param_field(struct qeth_card *card,
2391                 char *param_field)
2392 {
2393
2394         param_field[0] = _ascebc['P'];
2395         param_field[1] = _ascebc['C'];
2396         param_field[2] = _ascebc['I'];
2397         param_field[3] = _ascebc['T'];
2398         *((unsigned int *) (&param_field[4])) = QETH_PCI_THRESHOLD_A(card);
2399         *((unsigned int *) (&param_field[8])) = QETH_PCI_THRESHOLD_B(card);
2400         *((unsigned int *) (&param_field[12])) = QETH_PCI_TIMER_VALUE(card);
2401 }
2402
2403 static void qeth_create_qib_param_field_blkt(struct qeth_card *card,
2404                 char *param_field)
2405 {
2406         param_field[16] = _ascebc['B'];
2407         param_field[17] = _ascebc['L'];
2408         param_field[18] = _ascebc['K'];
2409         param_field[19] = _ascebc['T'];
2410         *((unsigned int *) (&param_field[20])) = card->info.blkt.time_total;
2411         *((unsigned int *) (&param_field[24])) = card->info.blkt.inter_packet;
2412         *((unsigned int *) (&param_field[28])) =
2413                 card->info.blkt.inter_packet_jumbo;
2414 }
2415
2416 static int qeth_qdio_activate(struct qeth_card *card)
2417 {
2418         QETH_CARD_TEXT(card, 3, "qdioact");
2419         return qdio_activate(CARD_DDEV(card));
2420 }
2421
2422 static int qeth_dm_act(struct qeth_card *card)
2423 {
2424         struct qeth_cmd_buffer *iob;
2425
2426         QETH_CARD_TEXT(card, 2, "dmact");
2427
2428         iob = qeth_mpc_alloc_cmd(card, DM_ACT, DM_ACT_SIZE);
2429         if (!iob)
2430                 return -ENOMEM;
2431
2432         memcpy(QETH_DM_ACT_DEST_ADDR(iob->data),
2433                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2434         memcpy(QETH_DM_ACT_CONNECTION_TOKEN(iob->data),
2435                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2436         return qeth_send_control_data(card, iob, NULL, NULL);
2437 }
2438
2439 static int qeth_mpc_initialize(struct qeth_card *card)
2440 {
2441         int rc;
2442
2443         QETH_CARD_TEXT(card, 2, "mpcinit");
2444
2445         rc = qeth_issue_next_read(card);
2446         if (rc) {
2447                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
2448                 return rc;
2449         }
2450         rc = qeth_cm_enable(card);
2451         if (rc) {
2452                 QETH_CARD_TEXT_(card, 2, "2err%d", rc);
2453                 goto out_qdio;
2454         }
2455         rc = qeth_cm_setup(card);
2456         if (rc) {
2457                 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
2458                 goto out_qdio;
2459         }
2460         rc = qeth_ulp_enable(card);
2461         if (rc) {
2462                 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
2463                 goto out_qdio;
2464         }
2465         rc = qeth_ulp_setup(card);
2466         if (rc) {
2467                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2468                 goto out_qdio;
2469         }
2470         rc = qeth_alloc_qdio_queues(card);
2471         if (rc) {
2472                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2473                 goto out_qdio;
2474         }
2475         rc = qeth_qdio_establish(card);
2476         if (rc) {
2477                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
2478                 qeth_free_qdio_queues(card);
2479                 goto out_qdio;
2480         }
2481         rc = qeth_qdio_activate(card);
2482         if (rc) {
2483                 QETH_CARD_TEXT_(card, 2, "7err%d", rc);
2484                 goto out_qdio;
2485         }
2486         rc = qeth_dm_act(card);
2487         if (rc) {
2488                 QETH_CARD_TEXT_(card, 2, "8err%d", rc);
2489                 goto out_qdio;
2490         }
2491
2492         return 0;
2493 out_qdio:
2494         qeth_qdio_clear_card(card, !IS_IQD(card));
2495         qdio_free(CARD_DDEV(card));
2496         return rc;
2497 }
2498
2499 void qeth_print_status_message(struct qeth_card *card)
2500 {
2501         switch (card->info.type) {
2502         case QETH_CARD_TYPE_OSD:
2503         case QETH_CARD_TYPE_OSM:
2504         case QETH_CARD_TYPE_OSX:
2505                 /* VM will use a non-zero first character
2506                  * to indicate a HiperSockets like reporting
2507                  * of the level OSA sets the first character to zero
2508                  * */
2509                 if (!card->info.mcl_level[0]) {
2510                         sprintf(card->info.mcl_level, "%02x%02x",
2511                                 card->info.mcl_level[2],
2512                                 card->info.mcl_level[3]);
2513                         break;
2514                 }
2515                 /* fallthrough */
2516         case QETH_CARD_TYPE_IQD:
2517                 if (IS_VM_NIC(card) || (card->info.mcl_level[0] & 0x80)) {
2518                         card->info.mcl_level[0] = (char) _ebcasc[(__u8)
2519                                 card->info.mcl_level[0]];
2520                         card->info.mcl_level[1] = (char) _ebcasc[(__u8)
2521                                 card->info.mcl_level[1]];
2522                         card->info.mcl_level[2] = (char) _ebcasc[(__u8)
2523                                 card->info.mcl_level[2]];
2524                         card->info.mcl_level[3] = (char) _ebcasc[(__u8)
2525                                 card->info.mcl_level[3]];
2526                         card->info.mcl_level[QETH_MCL_LENGTH] = 0;
2527                 }
2528                 break;
2529         default:
2530                 memset(&card->info.mcl_level[0], 0, QETH_MCL_LENGTH + 1);
2531         }
2532         dev_info(&card->gdev->dev,
2533                  "Device is a%s card%s%s%s\nwith link type %s.\n",
2534                  qeth_get_cardname(card),
2535                  (card->info.mcl_level[0]) ? " (level: " : "",
2536                  (card->info.mcl_level[0]) ? card->info.mcl_level : "",
2537                  (card->info.mcl_level[0]) ? ")" : "",
2538                  qeth_get_cardname_short(card));
2539 }
2540 EXPORT_SYMBOL_GPL(qeth_print_status_message);
2541
2542 static void qeth_initialize_working_pool_list(struct qeth_card *card)
2543 {
2544         struct qeth_buffer_pool_entry *entry;
2545
2546         QETH_CARD_TEXT(card, 5, "inwrklst");
2547
2548         list_for_each_entry(entry,
2549                             &card->qdio.init_pool.entry_list, init_list) {
2550                 qeth_put_buffer_pool_entry(card, entry);
2551         }
2552 }
2553
2554 static struct qeth_buffer_pool_entry *qeth_find_free_buffer_pool_entry(
2555                                         struct qeth_card *card)
2556 {
2557         struct list_head *plh;
2558         struct qeth_buffer_pool_entry *entry;
2559         int i, free;
2560         struct page *page;
2561
2562         if (list_empty(&card->qdio.in_buf_pool.entry_list))
2563                 return NULL;
2564
2565         list_for_each(plh, &card->qdio.in_buf_pool.entry_list) {
2566                 entry = list_entry(plh, struct qeth_buffer_pool_entry, list);
2567                 free = 1;
2568                 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2569                         if (page_count(virt_to_page(entry->elements[i])) > 1) {
2570                                 free = 0;
2571                                 break;
2572                         }
2573                 }
2574                 if (free) {
2575                         list_del_init(&entry->list);
2576                         return entry;
2577                 }
2578         }
2579
2580         /* no free buffer in pool so take first one and swap pages */
2581         entry = list_entry(card->qdio.in_buf_pool.entry_list.next,
2582                         struct qeth_buffer_pool_entry, list);
2583         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2584                 if (page_count(virt_to_page(entry->elements[i])) > 1) {
2585                         page = alloc_page(GFP_ATOMIC);
2586                         if (!page) {
2587                                 return NULL;
2588                         } else {
2589                                 free_page((unsigned long)entry->elements[i]);
2590                                 entry->elements[i] = page_address(page);
2591                                 QETH_CARD_STAT_INC(card, rx_sg_alloc_page);
2592                         }
2593                 }
2594         }
2595         list_del_init(&entry->list);
2596         return entry;
2597 }
2598
2599 static int qeth_init_input_buffer(struct qeth_card *card,
2600                 struct qeth_qdio_buffer *buf)
2601 {
2602         struct qeth_buffer_pool_entry *pool_entry;
2603         int i;
2604
2605         if ((card->options.cq == QETH_CQ_ENABLED) && (!buf->rx_skb)) {
2606                 buf->rx_skb = netdev_alloc_skb(card->dev,
2607                                                QETH_RX_PULL_LEN + ETH_HLEN);
2608                 if (!buf->rx_skb)
2609                         return 1;
2610         }
2611
2612         pool_entry = qeth_find_free_buffer_pool_entry(card);
2613         if (!pool_entry)
2614                 return 1;
2615
2616         /*
2617          * since the buffer is accessed only from the input_tasklet
2618          * there shouldn't be a need to synchronize; also, since we use
2619          * the QETH_IN_BUF_REQUEUE_THRESHOLD we should never run  out off
2620          * buffers
2621          */
2622
2623         buf->pool_entry = pool_entry;
2624         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2625                 buf->buffer->element[i].length = PAGE_SIZE;
2626                 buf->buffer->element[i].addr =  pool_entry->elements[i];
2627                 if (i == QETH_MAX_BUFFER_ELEMENTS(card) - 1)
2628                         buf->buffer->element[i].eflags = SBAL_EFLAGS_LAST_ENTRY;
2629                 else
2630                         buf->buffer->element[i].eflags = 0;
2631                 buf->buffer->element[i].sflags = 0;
2632         }
2633         return 0;
2634 }
2635
2636 static unsigned int qeth_tx_select_bulk_max(struct qeth_card *card,
2637                                             struct qeth_qdio_out_q *queue)
2638 {
2639         if (!IS_IQD(card) ||
2640             qeth_iqd_is_mcast_queue(card, queue) ||
2641             card->options.cq == QETH_CQ_ENABLED ||
2642             qdio_get_ssqd_desc(CARD_DDEV(card), &card->ssqd))
2643                 return 1;
2644
2645         return card->ssqd.mmwc ? card->ssqd.mmwc : 1;
2646 }
2647
2648 int qeth_init_qdio_queues(struct qeth_card *card)
2649 {
2650         unsigned int i;
2651         int rc;
2652
2653         QETH_CARD_TEXT(card, 2, "initqdqs");
2654
2655         /* inbound queue */
2656         qdio_reset_buffers(card->qdio.in_q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2657         memset(&card->rx, 0, sizeof(struct qeth_rx));
2658         qeth_initialize_working_pool_list(card);
2659         /*give only as many buffers to hardware as we have buffer pool entries*/
2660         for (i = 0; i < card->qdio.in_buf_pool.buf_count - 1; ++i)
2661                 qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]);
2662         card->qdio.in_q->next_buf_to_init =
2663                 card->qdio.in_buf_pool.buf_count - 1;
2664         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0, 0,
2665                      card->qdio.in_buf_pool.buf_count - 1);
2666         if (rc) {
2667                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
2668                 return rc;
2669         }
2670
2671         /* completion */
2672         rc = qeth_cq_init(card);
2673         if (rc) {
2674                 return rc;
2675         }
2676
2677         /* outbound queue */
2678         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2679                 struct qeth_qdio_out_q *queue = card->qdio.out_qs[i];
2680
2681                 qdio_reset_buffers(queue->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2682                 queue->max_elements = QETH_MAX_BUFFER_ELEMENTS(card);
2683                 queue->next_buf_to_fill = 0;
2684                 queue->do_pack = 0;
2685                 queue->prev_hdr = NULL;
2686                 queue->bulk_start = 0;
2687                 queue->bulk_count = 0;
2688                 queue->bulk_max = qeth_tx_select_bulk_max(card, queue);
2689                 atomic_set(&queue->used_buffers, 0);
2690                 atomic_set(&queue->set_pci_flags_count, 0);
2691                 atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
2692                 netdev_tx_reset_queue(netdev_get_tx_queue(card->dev, i));
2693         }
2694         return 0;
2695 }
2696 EXPORT_SYMBOL_GPL(qeth_init_qdio_queues);
2697
2698 static void qeth_ipa_finalize_cmd(struct qeth_card *card,
2699                                   struct qeth_cmd_buffer *iob)
2700 {
2701         qeth_mpc_finalize_cmd(card, iob);
2702
2703         /* override with IPA-specific values: */
2704         __ipa_cmd(iob)->hdr.seqno = card->seqno.ipa++;
2705 }
2706
2707 void qeth_prepare_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
2708                           u16 cmd_length)
2709 {
2710         u8 prot_type = qeth_mpc_select_prot_type(card);
2711         u16 total_length = iob->length;
2712
2713         qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, total_length,
2714                        iob->data);
2715         iob->finalize = qeth_ipa_finalize_cmd;
2716
2717         memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
2718         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &total_length, 2);
2719         memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1);
2720         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &cmd_length, 2);
2721         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &cmd_length, 2);
2722         memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
2723                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2724         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &cmd_length, 2);
2725 }
2726 EXPORT_SYMBOL_GPL(qeth_prepare_ipa_cmd);
2727
2728 struct qeth_cmd_buffer *qeth_ipa_alloc_cmd(struct qeth_card *card,
2729                                            enum qeth_ipa_cmds cmd_code,
2730                                            enum qeth_prot_versions prot,
2731                                            unsigned int data_length)
2732 {
2733         enum qeth_link_types link_type = card->info.link_type;
2734         struct qeth_cmd_buffer *iob;
2735         struct qeth_ipacmd_hdr *hdr;
2736
2737         data_length += offsetof(struct qeth_ipa_cmd, data);
2738         iob = qeth_alloc_cmd(&card->write, IPA_PDU_HEADER_SIZE + data_length, 1,
2739                              QETH_IPA_TIMEOUT);
2740         if (!iob)
2741                 return NULL;
2742
2743         qeth_prepare_ipa_cmd(card, iob, data_length);
2744
2745         hdr = &__ipa_cmd(iob)->hdr;
2746         hdr->command = cmd_code;
2747         hdr->initiator = IPA_CMD_INITIATOR_HOST;
2748         /* hdr->seqno is set by qeth_send_control_data() */
2749         hdr->adapter_type = (link_type == QETH_LINK_TYPE_HSTR) ? 2 : 1;
2750         hdr->rel_adapter_no = (u8) card->dev->dev_port;
2751         hdr->prim_version_no = IS_LAYER2(card) ? 2 : 1;
2752         hdr->param_count = 1;
2753         hdr->prot_version = prot;
2754         return iob;
2755 }
2756 EXPORT_SYMBOL_GPL(qeth_ipa_alloc_cmd);
2757
2758 static int qeth_send_ipa_cmd_cb(struct qeth_card *card,
2759                                 struct qeth_reply *reply, unsigned long data)
2760 {
2761         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2762
2763         return (cmd->hdr.return_code) ? -EIO : 0;
2764 }
2765
2766 /**
2767  * qeth_send_ipa_cmd() - send an IPA command
2768  *
2769  * See qeth_send_control_data() for explanation of the arguments.
2770  */
2771
2772 int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
2773                 int (*reply_cb)(struct qeth_card *, struct qeth_reply*,
2774                         unsigned long),
2775                 void *reply_param)
2776 {
2777         int rc;
2778
2779         QETH_CARD_TEXT(card, 4, "sendipa");
2780
2781         if (card->read_or_write_problem) {
2782                 qeth_put_cmd(iob);
2783                 return -EIO;
2784         }
2785
2786         if (reply_cb == NULL)
2787                 reply_cb = qeth_send_ipa_cmd_cb;
2788         rc = qeth_send_control_data(card, iob, reply_cb, reply_param);
2789         if (rc == -ETIME) {
2790                 qeth_clear_ipacmd_list(card);
2791                 qeth_schedule_recovery(card);
2792         }
2793         return rc;
2794 }
2795 EXPORT_SYMBOL_GPL(qeth_send_ipa_cmd);
2796
2797 static int qeth_send_startlan_cb(struct qeth_card *card,
2798                                  struct qeth_reply *reply, unsigned long data)
2799 {
2800         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2801
2802         if (cmd->hdr.return_code == IPA_RC_LAN_OFFLINE)
2803                 return -ENETDOWN;
2804
2805         return (cmd->hdr.return_code) ? -EIO : 0;
2806 }
2807
2808 static int qeth_send_startlan(struct qeth_card *card)
2809 {
2810         struct qeth_cmd_buffer *iob;
2811
2812         QETH_CARD_TEXT(card, 2, "strtlan");
2813
2814         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_STARTLAN, QETH_PROT_NONE, 0);
2815         if (!iob)
2816                 return -ENOMEM;
2817         return qeth_send_ipa_cmd(card, iob, qeth_send_startlan_cb, NULL);
2818 }
2819
2820 static int qeth_setadpparms_inspect_rc(struct qeth_ipa_cmd *cmd)
2821 {
2822         if (!cmd->hdr.return_code)
2823                 cmd->hdr.return_code =
2824                         cmd->data.setadapterparms.hdr.return_code;
2825         return cmd->hdr.return_code;
2826 }
2827
2828 static int qeth_query_setadapterparms_cb(struct qeth_card *card,
2829                 struct qeth_reply *reply, unsigned long data)
2830 {
2831         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2832
2833         QETH_CARD_TEXT(card, 3, "quyadpcb");
2834         if (qeth_setadpparms_inspect_rc(cmd))
2835                 return -EIO;
2836
2837         if (cmd->data.setadapterparms.data.query_cmds_supp.lan_type & 0x7f) {
2838                 card->info.link_type =
2839                       cmd->data.setadapterparms.data.query_cmds_supp.lan_type;
2840                 QETH_CARD_TEXT_(card, 2, "lnk %d", card->info.link_type);
2841         }
2842         card->options.adp.supported_funcs =
2843                 cmd->data.setadapterparms.data.query_cmds_supp.supported_cmds;
2844         return 0;
2845 }
2846
2847 static struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card,
2848                                                     enum qeth_ipa_setadp_cmd adp_cmd,
2849                                                     unsigned int data_length)
2850 {
2851         struct qeth_ipacmd_setadpparms_hdr *hdr;
2852         struct qeth_cmd_buffer *iob;
2853
2854         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETADAPTERPARMS, QETH_PROT_IPV4,
2855                                  data_length +
2856                                  offsetof(struct qeth_ipacmd_setadpparms,
2857                                           data));
2858         if (!iob)
2859                 return NULL;
2860
2861         hdr = &__ipa_cmd(iob)->data.setadapterparms.hdr;
2862         hdr->cmdlength = sizeof(*hdr) + data_length;
2863         hdr->command_code = adp_cmd;
2864         hdr->used_total = 1;
2865         hdr->seq_no = 1;
2866         return iob;
2867 }
2868
2869 static int qeth_query_setadapterparms(struct qeth_card *card)
2870 {
2871         int rc;
2872         struct qeth_cmd_buffer *iob;
2873
2874         QETH_CARD_TEXT(card, 3, "queryadp");
2875         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_COMMANDS_SUPPORTED,
2876                                    SETADP_DATA_SIZEOF(query_cmds_supp));
2877         if (!iob)
2878                 return -ENOMEM;
2879         rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL);
2880         return rc;
2881 }
2882
2883 static int qeth_query_ipassists_cb(struct qeth_card *card,
2884                 struct qeth_reply *reply, unsigned long data)
2885 {
2886         struct qeth_ipa_cmd *cmd;
2887
2888         QETH_CARD_TEXT(card, 2, "qipasscb");
2889
2890         cmd = (struct qeth_ipa_cmd *) data;
2891
2892         switch (cmd->hdr.return_code) {
2893         case IPA_RC_SUCCESS:
2894                 break;
2895         case IPA_RC_NOTSUPP:
2896         case IPA_RC_L2_UNSUPPORTED_CMD:
2897                 QETH_CARD_TEXT(card, 2, "ipaunsup");
2898                 card->options.ipa4.supported_funcs |= IPA_SETADAPTERPARMS;
2899                 card->options.ipa6.supported_funcs |= IPA_SETADAPTERPARMS;
2900                 return -EOPNOTSUPP;
2901         default:
2902                 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Unhandled rc=%#x\n",
2903                                  CARD_DEVID(card), cmd->hdr.return_code);
2904                 return -EIO;
2905         }
2906
2907         if (cmd->hdr.prot_version == QETH_PROT_IPV4) {
2908                 card->options.ipa4.supported_funcs = cmd->hdr.ipa_supported;
2909                 card->options.ipa4.enabled_funcs = cmd->hdr.ipa_enabled;
2910         } else if (cmd->hdr.prot_version == QETH_PROT_IPV6) {
2911                 card->options.ipa6.supported_funcs = cmd->hdr.ipa_supported;
2912                 card->options.ipa6.enabled_funcs = cmd->hdr.ipa_enabled;
2913         } else
2914                 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Flawed LIC detected\n",
2915                                  CARD_DEVID(card));
2916         return 0;
2917 }
2918
2919 static int qeth_query_ipassists(struct qeth_card *card,
2920                                 enum qeth_prot_versions prot)
2921 {
2922         int rc;
2923         struct qeth_cmd_buffer *iob;
2924
2925         QETH_CARD_TEXT_(card, 2, "qipassi%i", prot);
2926         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_QIPASSIST, prot, 0);
2927         if (!iob)
2928                 return -ENOMEM;
2929         rc = qeth_send_ipa_cmd(card, iob, qeth_query_ipassists_cb, NULL);
2930         return rc;
2931 }
2932
2933 static int qeth_query_switch_attributes_cb(struct qeth_card *card,
2934                                 struct qeth_reply *reply, unsigned long data)
2935 {
2936         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2937         struct qeth_query_switch_attributes *attrs;
2938         struct qeth_switch_info *sw_info;
2939
2940         QETH_CARD_TEXT(card, 2, "qswiatcb");
2941         if (qeth_setadpparms_inspect_rc(cmd))
2942                 return -EIO;
2943
2944         sw_info = (struct qeth_switch_info *)reply->param;
2945         attrs = &cmd->data.setadapterparms.data.query_switch_attributes;
2946         sw_info->capabilities = attrs->capabilities;
2947         sw_info->settings = attrs->settings;
2948         QETH_CARD_TEXT_(card, 2, "%04x%04x", sw_info->capabilities,
2949                         sw_info->settings);
2950         return 0;
2951 }
2952
2953 int qeth_query_switch_attributes(struct qeth_card *card,
2954                                  struct qeth_switch_info *sw_info)
2955 {
2956         struct qeth_cmd_buffer *iob;
2957
2958         QETH_CARD_TEXT(card, 2, "qswiattr");
2959         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES))
2960                 return -EOPNOTSUPP;
2961         if (!netif_carrier_ok(card->dev))
2962                 return -ENOMEDIUM;
2963         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES, 0);
2964         if (!iob)
2965                 return -ENOMEM;
2966         return qeth_send_ipa_cmd(card, iob,
2967                                 qeth_query_switch_attributes_cb, sw_info);
2968 }
2969
2970 struct qeth_cmd_buffer *qeth_get_diag_cmd(struct qeth_card *card,
2971                                           enum qeth_diags_cmds sub_cmd,
2972                                           unsigned int data_length)
2973 {
2974         struct qeth_ipacmd_diagass *cmd;
2975         struct qeth_cmd_buffer *iob;
2976
2977         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SET_DIAG_ASS, QETH_PROT_NONE,
2978                                  DIAG_HDR_LEN + data_length);
2979         if (!iob)
2980                 return NULL;
2981
2982         cmd = &__ipa_cmd(iob)->data.diagass;
2983         cmd->subcmd_len = DIAG_SUB_HDR_LEN + data_length;
2984         cmd->subcmd = sub_cmd;
2985         return iob;
2986 }
2987 EXPORT_SYMBOL_GPL(qeth_get_diag_cmd);
2988
2989 static int qeth_query_setdiagass_cb(struct qeth_card *card,
2990                 struct qeth_reply *reply, unsigned long data)
2991 {
2992         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2993         u16 rc = cmd->hdr.return_code;
2994
2995         if (rc) {
2996                 QETH_CARD_TEXT_(card, 2, "diagq:%x", rc);
2997                 return -EIO;
2998         }
2999
3000         card->info.diagass_support = cmd->data.diagass.ext;
3001         return 0;
3002 }
3003
3004 static int qeth_query_setdiagass(struct qeth_card *card)
3005 {
3006         struct qeth_cmd_buffer *iob;
3007
3008         QETH_CARD_TEXT(card, 2, "qdiagass");
3009         iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_QUERY, 0);
3010         if (!iob)
3011                 return -ENOMEM;
3012         return qeth_send_ipa_cmd(card, iob, qeth_query_setdiagass_cb, NULL);
3013 }
3014
3015 static void qeth_get_trap_id(struct qeth_card *card, struct qeth_trap_id *tid)
3016 {
3017         unsigned long info = get_zeroed_page(GFP_KERNEL);
3018         struct sysinfo_2_2_2 *info222 = (struct sysinfo_2_2_2 *)info;
3019         struct sysinfo_3_2_2 *info322 = (struct sysinfo_3_2_2 *)info;
3020         struct ccw_dev_id ccwid;
3021         int level;
3022
3023         tid->chpid = card->info.chpid;
3024         ccw_device_get_id(CARD_RDEV(card), &ccwid);
3025         tid->ssid = ccwid.ssid;
3026         tid->devno = ccwid.devno;
3027         if (!info)
3028                 return;
3029         level = stsi(NULL, 0, 0, 0);
3030         if ((level >= 2) && (stsi(info222, 2, 2, 2) == 0))
3031                 tid->lparnr = info222->lpar_number;
3032         if ((level >= 3) && (stsi(info322, 3, 2, 2) == 0)) {
3033                 EBCASC(info322->vm[0].name, sizeof(info322->vm[0].name));
3034                 memcpy(tid->vmname, info322->vm[0].name, sizeof(tid->vmname));
3035         }
3036         free_page(info);
3037         return;
3038 }
3039
3040 static int qeth_hw_trap_cb(struct qeth_card *card,
3041                 struct qeth_reply *reply, unsigned long data)
3042 {
3043         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3044         u16 rc = cmd->hdr.return_code;
3045
3046         if (rc) {
3047                 QETH_CARD_TEXT_(card, 2, "trapc:%x", rc);
3048                 return -EIO;
3049         }
3050         return 0;
3051 }
3052
3053 int qeth_hw_trap(struct qeth_card *card, enum qeth_diags_trap_action action)
3054 {
3055         struct qeth_cmd_buffer *iob;
3056         struct qeth_ipa_cmd *cmd;
3057
3058         QETH_CARD_TEXT(card, 2, "diagtrap");
3059         iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_TRAP, 64);
3060         if (!iob)
3061                 return -ENOMEM;
3062         cmd = __ipa_cmd(iob);
3063         cmd->data.diagass.type = 1;
3064         cmd->data.diagass.action = action;
3065         switch (action) {
3066         case QETH_DIAGS_TRAP_ARM:
3067                 cmd->data.diagass.options = 0x0003;
3068                 cmd->data.diagass.ext = 0x00010000 +
3069                         sizeof(struct qeth_trap_id);
3070                 qeth_get_trap_id(card,
3071                         (struct qeth_trap_id *)cmd->data.diagass.cdata);
3072                 break;
3073         case QETH_DIAGS_TRAP_DISARM:
3074                 cmd->data.diagass.options = 0x0001;
3075                 break;
3076         case QETH_DIAGS_TRAP_CAPTURE:
3077                 break;
3078         }
3079         return qeth_send_ipa_cmd(card, iob, qeth_hw_trap_cb, NULL);
3080 }
3081 EXPORT_SYMBOL_GPL(qeth_hw_trap);
3082
3083 static int qeth_check_qdio_errors(struct qeth_card *card,
3084                                   struct qdio_buffer *buf,
3085                                   unsigned int qdio_error,
3086                                   const char *dbftext)
3087 {
3088         if (qdio_error) {
3089                 QETH_CARD_TEXT(card, 2, dbftext);
3090                 QETH_CARD_TEXT_(card, 2, " F15=%02X",
3091                                buf->element[15].sflags);
3092                 QETH_CARD_TEXT_(card, 2, " F14=%02X",
3093                                buf->element[14].sflags);
3094                 QETH_CARD_TEXT_(card, 2, " qerr=%X", qdio_error);
3095                 if ((buf->element[15].sflags) == 0x12) {
3096                         QETH_CARD_STAT_INC(card, rx_dropped);
3097                         return 0;
3098                 } else
3099                         return 1;
3100         }
3101         return 0;
3102 }
3103
3104 static void qeth_queue_input_buffer(struct qeth_card *card, int index)
3105 {
3106         struct qeth_qdio_q *queue = card->qdio.in_q;
3107         struct list_head *lh;
3108         int count;
3109         int i;
3110         int rc;
3111         int newcount = 0;
3112
3113         count = (index < queue->next_buf_to_init)?
3114                 card->qdio.in_buf_pool.buf_count -
3115                 (queue->next_buf_to_init - index) :
3116                 card->qdio.in_buf_pool.buf_count -
3117                 (queue->next_buf_to_init + QDIO_MAX_BUFFERS_PER_Q - index);
3118         /* only requeue at a certain threshold to avoid SIGAs */
3119         if (count >= QETH_IN_BUF_REQUEUE_THRESHOLD(card)) {
3120                 for (i = queue->next_buf_to_init;
3121                      i < queue->next_buf_to_init + count; ++i) {
3122                         if (qeth_init_input_buffer(card,
3123                                 &queue->bufs[QDIO_BUFNR(i)])) {
3124                                 break;
3125                         } else {
3126                                 newcount++;
3127                         }
3128                 }
3129
3130                 if (newcount < count) {
3131                         /* we are in memory shortage so we switch back to
3132                            traditional skb allocation and drop packages */
3133                         atomic_set(&card->force_alloc_skb, 3);
3134                         count = newcount;
3135                 } else {
3136                         atomic_add_unless(&card->force_alloc_skb, -1, 0);
3137                 }
3138
3139                 if (!count) {
3140                         i = 0;
3141                         list_for_each(lh, &card->qdio.in_buf_pool.entry_list)
3142                                 i++;
3143                         if (i == card->qdio.in_buf_pool.buf_count) {
3144                                 QETH_CARD_TEXT(card, 2, "qsarbw");
3145                                 card->reclaim_index = index;
3146                                 schedule_delayed_work(
3147                                         &card->buffer_reclaim_work,
3148                                         QETH_RECLAIM_WORK_TIME);
3149                         }
3150                         return;
3151                 }
3152
3153                 /*
3154                  * according to old code it should be avoided to requeue all
3155                  * 128 buffers in order to benefit from PCI avoidance.
3156                  * this function keeps at least one buffer (the buffer at
3157                  * 'index') un-requeued -> this buffer is the first buffer that
3158                  * will be requeued the next time
3159                  */
3160                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0,
3161                              queue->next_buf_to_init, count);
3162                 if (rc) {
3163                         QETH_CARD_TEXT(card, 2, "qinberr");
3164                 }
3165                 queue->next_buf_to_init = QDIO_BUFNR(queue->next_buf_to_init +
3166                                                      count);
3167         }
3168 }
3169
3170 static void qeth_buffer_reclaim_work(struct work_struct *work)
3171 {
3172         struct qeth_card *card = container_of(work, struct qeth_card,
3173                 buffer_reclaim_work.work);
3174
3175         QETH_CARD_TEXT_(card, 2, "brw:%x", card->reclaim_index);
3176         qeth_queue_input_buffer(card, card->reclaim_index);
3177 }
3178
3179 static void qeth_handle_send_error(struct qeth_card *card,
3180                 struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err)
3181 {
3182         int sbalf15 = buffer->buffer->element[15].sflags;
3183
3184         QETH_CARD_TEXT(card, 6, "hdsnderr");
3185         qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr");
3186
3187         if (!qdio_err)
3188                 return;
3189
3190         if ((sbalf15 >= 15) && (sbalf15 <= 31))
3191                 return;
3192
3193         QETH_CARD_TEXT(card, 1, "lnkfail");
3194         QETH_CARD_TEXT_(card, 1, "%04x %02x",
3195                        (u16)qdio_err, (u8)sbalf15);
3196 }
3197
3198 /**
3199  * qeth_prep_flush_pack_buffer - Prepares flushing of a packing buffer.
3200  * @queue: queue to check for packing buffer
3201  *
3202  * Returns number of buffers that were prepared for flush.
3203  */
3204 static int qeth_prep_flush_pack_buffer(struct qeth_qdio_out_q *queue)
3205 {
3206         struct qeth_qdio_out_buffer *buffer;
3207
3208         buffer = queue->bufs[queue->next_buf_to_fill];
3209         if ((atomic_read(&buffer->state) == QETH_QDIO_BUF_EMPTY) &&
3210             (buffer->next_element_to_fill > 0)) {
3211                 /* it's a packing buffer */
3212                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3213                 queue->next_buf_to_fill =
3214                         QDIO_BUFNR(queue->next_buf_to_fill + 1);
3215                 return 1;
3216         }
3217         return 0;
3218 }
3219
3220 /*
3221  * Switched to packing state if the number of used buffers on a queue
3222  * reaches a certain limit.
3223  */
3224 static void qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q *queue)
3225 {
3226         if (!queue->do_pack) {
3227                 if (atomic_read(&queue->used_buffers)
3228                     >= QETH_HIGH_WATERMARK_PACK){
3229                         /* switch non-PACKING -> PACKING */
3230                         QETH_CARD_TEXT(queue->card, 6, "np->pack");
3231                         QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3232                         queue->do_pack = 1;
3233                 }
3234         }
3235 }
3236
3237 /*
3238  * Switches from packing to non-packing mode. If there is a packing
3239  * buffer on the queue this buffer will be prepared to be flushed.
3240  * In that case 1 is returned to inform the caller. If no buffer
3241  * has to be flushed, zero is returned.
3242  */
3243 static int qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q *queue)
3244 {
3245         if (queue->do_pack) {
3246                 if (atomic_read(&queue->used_buffers)
3247                     <= QETH_LOW_WATERMARK_PACK) {
3248                         /* switch PACKING -> non-PACKING */
3249                         QETH_CARD_TEXT(queue->card, 6, "pack->np");
3250                         QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3251                         queue->do_pack = 0;
3252                         return qeth_prep_flush_pack_buffer(queue);
3253                 }
3254         }
3255         return 0;
3256 }
3257
3258 static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
3259                                int count)
3260 {
3261         struct qeth_card *card = queue->card;
3262         struct qeth_qdio_out_buffer *buf;
3263         int rc;
3264         int i;
3265         unsigned int qdio_flags;
3266
3267         for (i = index; i < index + count; ++i) {
3268                 unsigned int bidx = QDIO_BUFNR(i);
3269
3270                 buf = queue->bufs[bidx];
3271                 buf->buffer->element[buf->next_element_to_fill - 1].eflags |=
3272                                 SBAL_EFLAGS_LAST_ENTRY;
3273
3274                 if (queue->bufstates)
3275                         queue->bufstates[bidx].user = buf;
3276
3277                 if (IS_IQD(queue->card))
3278                         continue;
3279
3280                 if (!queue->do_pack) {
3281                         if ((atomic_read(&queue->used_buffers) >=
3282                                 (QETH_HIGH_WATERMARK_PACK -
3283                                  QETH_WATERMARK_PACK_FUZZ)) &&
3284                             !atomic_read(&queue->set_pci_flags_count)) {
3285                                 /* it's likely that we'll go to packing
3286                                  * mode soon */
3287                                 atomic_inc(&queue->set_pci_flags_count);
3288                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3289                         }
3290                 } else {
3291                         if (!atomic_read(&queue->set_pci_flags_count)) {
3292                                 /*
3293                                  * there's no outstanding PCI any more, so we
3294                                  * have to request a PCI to be sure the the PCI
3295                                  * will wake at some time in the future then we
3296                                  * can flush packed buffers that might still be
3297                                  * hanging around, which can happen if no
3298                                  * further send was requested by the stack
3299                                  */
3300                                 atomic_inc(&queue->set_pci_flags_count);
3301                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3302                         }
3303                 }
3304         }
3305
3306         qdio_flags = QDIO_FLAG_SYNC_OUTPUT;
3307         if (atomic_read(&queue->set_pci_flags_count))
3308                 qdio_flags |= QDIO_FLAG_PCI_OUT;
3309         rc = do_QDIO(CARD_DDEV(queue->card), qdio_flags,
3310                      queue->queue_no, index, count);
3311
3312         /* Fake the TX completion interrupt: */
3313         if (IS_IQD(card))
3314                 napi_schedule(&queue->napi);
3315
3316         if (rc) {
3317                 /* ignore temporary SIGA errors without busy condition */
3318                 if (rc == -ENOBUFS)
3319                         return;
3320                 QETH_CARD_TEXT(queue->card, 2, "flushbuf");
3321                 QETH_CARD_TEXT_(queue->card, 2, " q%d", queue->queue_no);
3322                 QETH_CARD_TEXT_(queue->card, 2, " idx%d", index);
3323                 QETH_CARD_TEXT_(queue->card, 2, " c%d", count);
3324                 QETH_CARD_TEXT_(queue->card, 2, " err%d", rc);
3325
3326                 /* this must not happen under normal circumstances. if it
3327                  * happens something is really wrong -> recover */
3328                 qeth_schedule_recovery(queue->card);
3329                 return;
3330         }
3331 }
3332
3333 static void qeth_flush_queue(struct qeth_qdio_out_q *queue)
3334 {
3335         qeth_flush_buffers(queue, queue->bulk_start, queue->bulk_count);
3336
3337         queue->bulk_start = QDIO_BUFNR(queue->bulk_start + queue->bulk_count);
3338         queue->prev_hdr = NULL;
3339         queue->bulk_count = 0;
3340 }
3341
3342 static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue)
3343 {
3344         int index;
3345         int flush_cnt = 0;
3346         int q_was_packing = 0;
3347
3348         /*
3349          * check if weed have to switch to non-packing mode or if
3350          * we have to get a pci flag out on the queue
3351          */
3352         if ((atomic_read(&queue->used_buffers) <= QETH_LOW_WATERMARK_PACK) ||
3353             !atomic_read(&queue->set_pci_flags_count)) {
3354                 if (atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH) ==
3355                                 QETH_OUT_Q_UNLOCKED) {
3356                         /*
3357                          * If we get in here, there was no action in
3358                          * do_send_packet. So, we check if there is a
3359                          * packing buffer to be flushed here.
3360                          */
3361                         index = queue->next_buf_to_fill;
3362                         q_was_packing = queue->do_pack;
3363                         /* queue->do_pack may change */
3364                         barrier();
3365                         flush_cnt += qeth_switch_to_nonpacking_if_needed(queue);
3366                         if (!flush_cnt &&
3367                             !atomic_read(&queue->set_pci_flags_count))
3368                                 flush_cnt += qeth_prep_flush_pack_buffer(queue);
3369                         if (q_was_packing)
3370                                 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_cnt);
3371                         if (flush_cnt)
3372                                 qeth_flush_buffers(queue, index, flush_cnt);
3373                         atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
3374                 }
3375         }
3376 }
3377
3378 static void qeth_qdio_start_poll(struct ccw_device *ccwdev, int queue,
3379                                  unsigned long card_ptr)
3380 {
3381         struct qeth_card *card = (struct qeth_card *)card_ptr;
3382
3383         if (card->dev->flags & IFF_UP)
3384                 napi_schedule(&card->napi);
3385 }
3386
3387 int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq)
3388 {
3389         int rc;
3390
3391         if (card->options.cq ==  QETH_CQ_NOTAVAILABLE) {
3392                 rc = -1;
3393                 goto out;
3394         } else {
3395                 if (card->options.cq == cq) {
3396                         rc = 0;
3397                         goto out;
3398                 }
3399
3400                 if (card->state != CARD_STATE_DOWN) {
3401                         rc = -1;
3402                         goto out;
3403                 }
3404
3405                 qeth_free_qdio_queues(card);
3406                 card->options.cq = cq;
3407                 rc = 0;
3408         }
3409 out:
3410         return rc;
3411
3412 }
3413 EXPORT_SYMBOL_GPL(qeth_configure_cq);
3414
3415 static void qeth_qdio_cq_handler(struct qeth_card *card, unsigned int qdio_err,
3416                                  unsigned int queue, int first_element,
3417                                  int count)
3418 {
3419         struct qeth_qdio_q *cq = card->qdio.c_q;
3420         int i;
3421         int rc;
3422
3423         if (!qeth_is_cq(card, queue))
3424                 return;
3425
3426         QETH_CARD_TEXT_(card, 5, "qcqhe%d", first_element);
3427         QETH_CARD_TEXT_(card, 5, "qcqhc%d", count);
3428         QETH_CARD_TEXT_(card, 5, "qcqherr%d", qdio_err);
3429
3430         if (qdio_err) {
3431                 netif_tx_stop_all_queues(card->dev);
3432                 qeth_schedule_recovery(card);
3433                 return;
3434         }
3435
3436         for (i = first_element; i < first_element + count; ++i) {
3437                 struct qdio_buffer *buffer = cq->qdio_bufs[QDIO_BUFNR(i)];
3438                 int e = 0;
3439
3440                 while ((e < QDIO_MAX_ELEMENTS_PER_BUFFER) &&
3441                        buffer->element[e].addr) {
3442                         unsigned long phys_aob_addr;
3443
3444                         phys_aob_addr = (unsigned long) buffer->element[e].addr;
3445                         qeth_qdio_handle_aob(card, phys_aob_addr);
3446                         ++e;
3447                 }
3448                 qeth_scrub_qdio_buffer(buffer, QDIO_MAX_ELEMENTS_PER_BUFFER);
3449         }
3450         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, queue,
3451                     card->qdio.c_q->next_buf_to_init,
3452                     count);
3453         if (rc) {
3454                 dev_warn(&card->gdev->dev,
3455                         "QDIO reported an error, rc=%i\n", rc);
3456                 QETH_CARD_TEXT(card, 2, "qcqherr");
3457         }
3458
3459         cq->next_buf_to_init = QDIO_BUFNR(cq->next_buf_to_init + count);
3460 }
3461
3462 static void qeth_qdio_input_handler(struct ccw_device *ccwdev,
3463                                     unsigned int qdio_err, int queue,
3464                                     int first_elem, int count,
3465                                     unsigned long card_ptr)
3466 {
3467         struct qeth_card *card = (struct qeth_card *)card_ptr;
3468
3469         QETH_CARD_TEXT_(card, 2, "qihq%d", queue);
3470         QETH_CARD_TEXT_(card, 2, "qiec%d", qdio_err);
3471
3472         if (qeth_is_cq(card, queue))
3473                 qeth_qdio_cq_handler(card, qdio_err, queue, first_elem, count);
3474         else if (qdio_err)
3475                 qeth_schedule_recovery(card);
3476 }
3477
3478 static void qeth_qdio_output_handler(struct ccw_device *ccwdev,
3479                                      unsigned int qdio_error, int __queue,
3480                                      int first_element, int count,
3481                                      unsigned long card_ptr)
3482 {
3483         struct qeth_card *card        = (struct qeth_card *) card_ptr;
3484         struct qeth_qdio_out_q *queue = card->qdio.out_qs[__queue];
3485         struct net_device *dev = card->dev;
3486         struct netdev_queue *txq;
3487         int i;
3488
3489         QETH_CARD_TEXT(card, 6, "qdouhdl");
3490         if (qdio_error & QDIO_ERROR_FATAL) {
3491                 QETH_CARD_TEXT(card, 2, "achkcond");
3492                 netif_tx_stop_all_queues(dev);
3493                 qeth_schedule_recovery(card);
3494                 return;
3495         }
3496
3497         for (i = first_element; i < (first_element + count); ++i) {
3498                 struct qeth_qdio_out_buffer *buf = queue->bufs[QDIO_BUFNR(i)];
3499
3500                 qeth_handle_send_error(card, buf, qdio_error);
3501                 qeth_clear_output_buffer(queue, buf, qdio_error, 0);
3502         }
3503
3504         atomic_sub(count, &queue->used_buffers);
3505         qeth_check_outbound_queue(queue);
3506
3507         txq = netdev_get_tx_queue(dev, __queue);
3508         /* xmit may have observed the full-condition, but not yet stopped the
3509          * txq. In which case the code below won't trigger. So before returning,
3510          * xmit will re-check the txq's fill level and wake it up if needed.
3511          */
3512         if (netif_tx_queue_stopped(txq) && !qeth_out_queue_is_full(queue))
3513                 netif_tx_wake_queue(txq);
3514 }
3515
3516 /**
3517  * Note: Function assumes that we have 4 outbound queues.
3518  */
3519 int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb)
3520 {
3521         struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
3522         u8 tos;
3523
3524         switch (card->qdio.do_prio_queueing) {
3525         case QETH_PRIO_Q_ING_TOS:
3526         case QETH_PRIO_Q_ING_PREC:
3527                 switch (qeth_get_ip_version(skb)) {
3528                 case 4:
3529                         tos = ipv4_get_dsfield(ip_hdr(skb));
3530                         break;
3531                 case 6:
3532                         tos = ipv6_get_dsfield(ipv6_hdr(skb));
3533                         break;
3534                 default:
3535                         return card->qdio.default_out_queue;
3536                 }
3537                 if (card->qdio.do_prio_queueing == QETH_PRIO_Q_ING_PREC)
3538                         return ~tos >> 6 & 3;
3539                 if (tos & IPTOS_MINCOST)
3540                         return 3;
3541                 if (tos & IPTOS_RELIABILITY)
3542                         return 2;
3543                 if (tos & IPTOS_THROUGHPUT)
3544                         return 1;
3545                 if (tos & IPTOS_LOWDELAY)
3546                         return 0;
3547                 break;
3548         case QETH_PRIO_Q_ING_SKB:
3549                 if (skb->priority > 5)
3550                         return 0;
3551                 return ~skb->priority >> 1 & 3;
3552         case QETH_PRIO_Q_ING_VLAN:
3553                 if (veth->h_vlan_proto == htons(ETH_P_8021Q))
3554                         return ~ntohs(veth->h_vlan_TCI) >>
3555                                (VLAN_PRIO_SHIFT + 1) & 3;
3556                 break;
3557         default:
3558                 break;
3559         }
3560         return card->qdio.default_out_queue;
3561 }
3562 EXPORT_SYMBOL_GPL(qeth_get_priority_queue);
3563
3564 /**
3565  * qeth_get_elements_for_frags() -      find number of SBALEs for skb frags.
3566  * @skb:                                SKB address
3567  *
3568  * Returns the number of pages, and thus QDIO buffer elements, needed to cover
3569  * fragmented part of the SKB. Returns zero for linear SKB.
3570  */
3571 static int qeth_get_elements_for_frags(struct sk_buff *skb)
3572 {
3573         int cnt, elements = 0;
3574
3575         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3576                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
3577
3578                 elements += qeth_get_elements_for_range(
3579                         (addr_t)skb_frag_address(frag),
3580                         (addr_t)skb_frag_address(frag) + skb_frag_size(frag));
3581         }
3582         return elements;
3583 }
3584
3585 /**
3586  * qeth_count_elements() -      Counts the number of QDIO buffer elements needed
3587  *                              to transmit an skb.
3588  * @skb:                        the skb to operate on.
3589  * @data_offset:                skip this part of the skb's linear data
3590  *
3591  * Returns the number of pages, and thus QDIO buffer elements, needed to map the
3592  * skb's data (both its linear part and paged fragments).
3593  */
3594 unsigned int qeth_count_elements(struct sk_buff *skb, unsigned int data_offset)
3595 {
3596         unsigned int elements = qeth_get_elements_for_frags(skb);
3597         addr_t end = (addr_t)skb->data + skb_headlen(skb);
3598         addr_t start = (addr_t)skb->data + data_offset;
3599
3600         if (start != end)
3601                 elements += qeth_get_elements_for_range(start, end);
3602         return elements;
3603 }
3604 EXPORT_SYMBOL_GPL(qeth_count_elements);
3605
3606 #define QETH_HDR_CACHE_OBJ_SIZE         (sizeof(struct qeth_hdr_tso) + \
3607                                          MAX_TCP_HEADER)
3608
3609 /**
3610  * qeth_add_hw_header() - add a HW header to an skb.
3611  * @skb: skb that the HW header should be added to.
3612  * @hdr: double pointer to a qeth_hdr. When returning with >= 0,
3613  *       it contains a valid pointer to a qeth_hdr.
3614  * @hdr_len: length of the HW header.
3615  * @proto_len: length of protocol headers that need to be in same page as the
3616  *             HW header.
3617  *
3618  * Returns the pushed length. If the header can't be pushed on
3619  * (eg. because it would cross a page boundary), it is allocated from
3620  * the cache instead and 0 is returned.
3621  * The number of needed buffer elements is returned in @elements.
3622  * Error to create the hdr is indicated by returning with < 0.
3623  */
3624 static int qeth_add_hw_header(struct qeth_qdio_out_q *queue,
3625                               struct sk_buff *skb, struct qeth_hdr **hdr,
3626                               unsigned int hdr_len, unsigned int proto_len,
3627                               unsigned int *elements)
3628 {
3629         const unsigned int contiguous = proto_len ? proto_len : 1;
3630         const unsigned int max_elements = queue->max_elements;
3631         unsigned int __elements;
3632         addr_t start, end;
3633         bool push_ok;
3634         int rc;
3635
3636 check_layout:
3637         start = (addr_t)skb->data - hdr_len;
3638         end = (addr_t)skb->data;
3639
3640         if (qeth_get_elements_for_range(start, end + contiguous) == 1) {
3641                 /* Push HW header into same page as first protocol header. */
3642                 push_ok = true;
3643                 /* ... but TSO always needs a separate element for headers: */
3644                 if (skb_is_gso(skb))
3645                         __elements = 1 + qeth_count_elements(skb, proto_len);
3646                 else
3647                         __elements = qeth_count_elements(skb, 0);
3648         } else if (!proto_len && PAGE_ALIGNED(skb->data)) {
3649                 /* Push HW header into preceding page, flush with skb->data. */
3650                 push_ok = true;
3651                 __elements = 1 + qeth_count_elements(skb, 0);
3652         } else {
3653                 /* Use header cache, copy protocol headers up. */
3654                 push_ok = false;
3655                 __elements = 1 + qeth_count_elements(skb, proto_len);
3656         }
3657
3658         /* Compress skb to fit into one IO buffer: */
3659         if (__elements > max_elements) {
3660                 if (!skb_is_nonlinear(skb)) {
3661                         /* Drop it, no easy way of shrinking it further. */
3662                         QETH_DBF_MESSAGE(2, "Dropped an oversized skb (Max Elements=%u / Actual=%u / Length=%u).\n",
3663                                          max_elements, __elements, skb->len);
3664                         return -E2BIG;
3665                 }
3666
3667                 rc = skb_linearize(skb);
3668                 if (rc) {
3669                         QETH_TXQ_STAT_INC(queue, skbs_linearized_fail);
3670                         return rc;
3671                 }
3672
3673                 QETH_TXQ_STAT_INC(queue, skbs_linearized);
3674                 /* Linearization changed the layout, re-evaluate: */
3675                 goto check_layout;
3676         }
3677
3678         *elements = __elements;
3679         /* Add the header: */
3680         if (push_ok) {
3681                 *hdr = skb_push(skb, hdr_len);
3682                 return hdr_len;
3683         }
3684         /* fall back */
3685         if (hdr_len + proto_len > QETH_HDR_CACHE_OBJ_SIZE)
3686                 return -E2BIG;
3687         *hdr = kmem_cache_alloc(qeth_core_header_cache, GFP_ATOMIC);
3688         if (!*hdr)
3689                 return -ENOMEM;
3690         /* Copy protocol headers behind HW header: */
3691         skb_copy_from_linear_data(skb, ((char *)*hdr) + hdr_len, proto_len);
3692         return 0;
3693 }
3694
3695 static bool qeth_iqd_may_bulk(struct qeth_qdio_out_q *queue,
3696                               struct sk_buff *curr_skb,
3697                               struct qeth_hdr *curr_hdr)
3698 {
3699         struct qeth_qdio_out_buffer *buffer = queue->bufs[queue->bulk_start];
3700         struct qeth_hdr *prev_hdr = queue->prev_hdr;
3701
3702         if (!prev_hdr)
3703                 return true;
3704
3705         /* All packets must have the same target: */
3706         if (curr_hdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER2) {
3707                 struct sk_buff *prev_skb = skb_peek(&buffer->skb_list);
3708
3709                 return ether_addr_equal(eth_hdr(prev_skb)->h_dest,
3710                                         eth_hdr(curr_skb)->h_dest) &&
3711                        qeth_l2_same_vlan(&prev_hdr->hdr.l2, &curr_hdr->hdr.l2);
3712         }
3713
3714         return qeth_l3_same_next_hop(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3) &&
3715                qeth_l3_iqd_same_vlan(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3);
3716 }
3717
3718 static unsigned int __qeth_fill_buffer(struct sk_buff *skb,
3719                                        struct qeth_qdio_out_buffer *buf,
3720                                        bool is_first_elem, unsigned int offset)
3721 {
3722         struct qdio_buffer *buffer = buf->buffer;
3723         int element = buf->next_element_to_fill;
3724         int length = skb_headlen(skb) - offset;
3725         char *data = skb->data + offset;
3726         unsigned int elem_length, cnt;
3727
3728         /* map linear part into buffer element(s) */
3729         while (length > 0) {
3730                 elem_length = min_t(unsigned int, length,
3731                                     PAGE_SIZE - offset_in_page(data));
3732
3733                 buffer->element[element].addr = data;
3734                 buffer->element[element].length = elem_length;
3735                 length -= elem_length;
3736                 if (is_first_elem) {
3737                         is_first_elem = false;
3738                         if (length || skb_is_nonlinear(skb))
3739                                 /* skb needs additional elements */
3740                                 buffer->element[element].eflags =
3741                                         SBAL_EFLAGS_FIRST_FRAG;
3742                         else
3743                                 buffer->element[element].eflags = 0;
3744                 } else {
3745                         buffer->element[element].eflags =
3746                                 SBAL_EFLAGS_MIDDLE_FRAG;
3747                 }
3748
3749                 data += elem_length;
3750                 element++;
3751         }
3752
3753         /* map page frags into buffer element(s) */
3754         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3755                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
3756
3757                 data = skb_frag_address(frag);
3758                 length = skb_frag_size(frag);
3759                 while (length > 0) {
3760                         elem_length = min_t(unsigned int, length,
3761                                             PAGE_SIZE - offset_in_page(data));
3762
3763                         buffer->element[element].addr = data;
3764                         buffer->element[element].length = elem_length;
3765                         buffer->element[element].eflags =
3766                                 SBAL_EFLAGS_MIDDLE_FRAG;
3767
3768                         length -= elem_length;
3769                         data += elem_length;
3770                         element++;
3771                 }
3772         }
3773
3774         if (buffer->element[element - 1].eflags)
3775                 buffer->element[element - 1].eflags = SBAL_EFLAGS_LAST_FRAG;
3776         buf->next_element_to_fill = element;
3777         return element;
3778 }
3779
3780 /**
3781  * qeth_fill_buffer() - map skb into an output buffer
3782  * @buf:        buffer to transport the skb
3783  * @skb:        skb to map into the buffer
3784  * @hdr:        qeth_hdr for this skb. Either at skb->data, or allocated
3785  *              from qeth_core_header_cache.
3786  * @offset:     when mapping the skb, start at skb->data + offset
3787  * @hd_len:     if > 0, build a dedicated header element of this size
3788  */
3789 static unsigned int qeth_fill_buffer(struct qeth_qdio_out_buffer *buf,
3790                                      struct sk_buff *skb, struct qeth_hdr *hdr,
3791                                      unsigned int offset, unsigned int hd_len)
3792 {
3793         struct qdio_buffer *buffer = buf->buffer;
3794         bool is_first_elem = true;
3795
3796         __skb_queue_tail(&buf->skb_list, skb);
3797
3798         /* build dedicated header element */
3799         if (hd_len) {
3800                 int element = buf->next_element_to_fill;
3801                 is_first_elem = false;
3802
3803                 buffer->element[element].addr = hdr;
3804                 buffer->element[element].length = hd_len;
3805                 buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
3806                 /* remember to free cache-allocated qeth_hdr: */
3807                 buf->is_header[element] = ((void *)hdr != skb->data);
3808                 buf->next_element_to_fill++;
3809         }
3810
3811         return __qeth_fill_buffer(skb, buf, is_first_elem, offset);
3812 }
3813
3814 static int __qeth_xmit(struct qeth_card *card, struct qeth_qdio_out_q *queue,
3815                        struct sk_buff *skb, unsigned int elements,
3816                        struct qeth_hdr *hdr, unsigned int offset,
3817                        unsigned int hd_len)
3818 {
3819         unsigned int bytes = qdisc_pkt_len(skb);
3820         struct qeth_qdio_out_buffer *buffer;
3821         unsigned int next_element;
3822         struct netdev_queue *txq;
3823         bool stopped = false;
3824         bool flush;
3825
3826         buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start + queue->bulk_count)];
3827         txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
3828
3829         /* Just a sanity check, the wake/stop logic should ensure that we always
3830          * get a free buffer.
3831          */
3832         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
3833                 return -EBUSY;
3834
3835         flush = !qeth_iqd_may_bulk(queue, skb, hdr);
3836
3837         if (flush ||
3838             (buffer->next_element_to_fill + elements > queue->max_elements)) {
3839                 if (buffer->next_element_to_fill > 0) {
3840                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3841                         queue->bulk_count++;
3842                 }
3843
3844                 if (queue->bulk_count >= queue->bulk_max)
3845                         flush = true;
3846
3847                 if (flush)
3848                         qeth_flush_queue(queue);
3849
3850                 buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start +
3851                                                 queue->bulk_count)];
3852
3853                 /* Sanity-check again: */
3854                 if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
3855                         return -EBUSY;
3856         }
3857
3858         if (buffer->next_element_to_fill == 0 &&
3859             atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
3860                 /* If a TX completion happens right _here_ and misses to wake
3861                  * the txq, then our re-check below will catch the race.
3862                  */
3863                 QETH_TXQ_STAT_INC(queue, stopped);
3864                 netif_tx_stop_queue(txq);
3865                 stopped = true;
3866         }
3867
3868         next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
3869         buffer->bytes += bytes;
3870         queue->prev_hdr = hdr;
3871
3872         flush = __netdev_tx_sent_queue(txq, bytes,
3873                                        !stopped && netdev_xmit_more());
3874
3875         if (flush || next_element >= queue->max_elements) {
3876                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3877                 queue->bulk_count++;
3878
3879                 if (queue->bulk_count >= queue->bulk_max)
3880                         flush = true;
3881
3882                 if (flush)
3883                         qeth_flush_queue(queue);
3884         }
3885
3886         if (stopped && !qeth_out_queue_is_full(queue))
3887                 netif_tx_start_queue(txq);
3888         return 0;
3889 }
3890
3891 int qeth_do_send_packet(struct qeth_card *card, struct qeth_qdio_out_q *queue,
3892                         struct sk_buff *skb, struct qeth_hdr *hdr,
3893                         unsigned int offset, unsigned int hd_len,
3894                         int elements_needed)
3895 {
3896         struct qeth_qdio_out_buffer *buffer;
3897         unsigned int next_element;
3898         struct netdev_queue *txq;
3899         bool stopped = false;
3900         int start_index;
3901         int flush_count = 0;
3902         int do_pack = 0;
3903         int tmp;
3904         int rc = 0;
3905
3906         /* spin until we get the queue ... */
3907         while (atomic_cmpxchg(&queue->state, QETH_OUT_Q_UNLOCKED,
3908                               QETH_OUT_Q_LOCKED) != QETH_OUT_Q_UNLOCKED);
3909         start_index = queue->next_buf_to_fill;
3910         buffer = queue->bufs[queue->next_buf_to_fill];
3911
3912         /* Just a sanity check, the wake/stop logic should ensure that we always
3913          * get a free buffer.
3914          */
3915         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY) {
3916                 atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
3917                 return -EBUSY;
3918         }
3919
3920         txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
3921
3922         /* check if we need to switch packing state of this queue */
3923         qeth_switch_to_packing_if_needed(queue);
3924         if (queue->do_pack) {
3925                 do_pack = 1;
3926                 /* does packet fit in current buffer? */
3927                 if (buffer->next_element_to_fill + elements_needed >
3928                     queue->max_elements) {
3929                         /* ... no -> set state PRIMED */
3930                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3931                         flush_count++;
3932                         queue->next_buf_to_fill =
3933                                 QDIO_BUFNR(queue->next_buf_to_fill + 1);
3934                         buffer = queue->bufs[queue->next_buf_to_fill];
3935
3936                         /* We stepped forward, so sanity-check again: */
3937                         if (atomic_read(&buffer->state) !=
3938                             QETH_QDIO_BUF_EMPTY) {
3939                                 qeth_flush_buffers(queue, start_index,
3940                                                            flush_count);
3941                                 atomic_set(&queue->state,
3942                                                 QETH_OUT_Q_UNLOCKED);
3943                                 rc = -EBUSY;
3944                                 goto out;
3945                         }
3946                 }
3947         }
3948
3949         if (buffer->next_element_to_fill == 0 &&
3950             atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
3951                 /* If a TX completion happens right _here_ and misses to wake
3952                  * the txq, then our re-check below will catch the race.
3953                  */
3954                 QETH_TXQ_STAT_INC(queue, stopped);
3955                 netif_tx_stop_queue(txq);
3956                 stopped = true;
3957         }
3958
3959         next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
3960
3961         if (queue->do_pack)
3962                 QETH_TXQ_STAT_INC(queue, skbs_pack);
3963         if (!queue->do_pack || stopped || next_element >= queue->max_elements) {
3964                 flush_count++;
3965                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3966                 queue->next_buf_to_fill =
3967                                 QDIO_BUFNR(queue->next_buf_to_fill + 1);
3968         }
3969
3970         if (flush_count)
3971                 qeth_flush_buffers(queue, start_index, flush_count);
3972         else if (!atomic_read(&queue->set_pci_flags_count))
3973                 atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH);
3974         /*
3975          * queue->state will go from LOCKED -> UNLOCKED or from
3976          * LOCKED_FLUSH -> LOCKED if output_handler wanted to 'notify' us
3977          * (switch packing state or flush buffer to get another pci flag out).
3978          * In that case we will enter this loop
3979          */
3980         while (atomic_dec_return(&queue->state)) {
3981                 start_index = queue->next_buf_to_fill;
3982                 /* check if we can go back to non-packing state */
3983                 tmp = qeth_switch_to_nonpacking_if_needed(queue);
3984                 /*
3985                  * check if we need to flush a packing buffer to get a pci
3986                  * flag out on the queue
3987                  */
3988                 if (!tmp && !atomic_read(&queue->set_pci_flags_count))
3989                         tmp = qeth_prep_flush_pack_buffer(queue);
3990                 if (tmp) {
3991                         qeth_flush_buffers(queue, start_index, tmp);
3992                         flush_count += tmp;
3993                 }
3994         }
3995 out:
3996         /* at this point the queue is UNLOCKED again */
3997         if (do_pack)
3998                 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_count);
3999
4000         if (stopped && !qeth_out_queue_is_full(queue))
4001                 netif_tx_start_queue(txq);
4002         return rc;
4003 }
4004 EXPORT_SYMBOL_GPL(qeth_do_send_packet);
4005
4006 static void qeth_fill_tso_ext(struct qeth_hdr_tso *hdr,
4007                               unsigned int payload_len, struct sk_buff *skb,
4008                               unsigned int proto_len)
4009 {
4010         struct qeth_hdr_ext_tso *ext = &hdr->ext;
4011
4012         ext->hdr_tot_len = sizeof(*ext);
4013         ext->imb_hdr_no = 1;
4014         ext->hdr_type = 1;
4015         ext->hdr_version = 1;
4016         ext->hdr_len = 28;
4017         ext->payload_len = payload_len;
4018         ext->mss = skb_shinfo(skb)->gso_size;
4019         ext->dg_hdr_len = proto_len;
4020 }
4021
4022 int qeth_xmit(struct qeth_card *card, struct sk_buff *skb,
4023               struct qeth_qdio_out_q *queue, int ipv,
4024               void (*fill_header)(struct qeth_qdio_out_q *queue,
4025                                   struct qeth_hdr *hdr, struct sk_buff *skb,
4026                                   int ipv, unsigned int data_len))
4027 {
4028         unsigned int proto_len, hw_hdr_len;
4029         unsigned int frame_len = skb->len;
4030         bool is_tso = skb_is_gso(skb);
4031         unsigned int data_offset = 0;
4032         struct qeth_hdr *hdr = NULL;
4033         unsigned int hd_len = 0;
4034         unsigned int elements;
4035         int push_len, rc;
4036
4037         if (is_tso) {
4038                 hw_hdr_len = sizeof(struct qeth_hdr_tso);
4039                 proto_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
4040         } else {
4041                 hw_hdr_len = sizeof(struct qeth_hdr);
4042                 proto_len = (IS_IQD(card) && IS_LAYER2(card)) ? ETH_HLEN : 0;
4043         }
4044
4045         rc = skb_cow_head(skb, hw_hdr_len);
4046         if (rc)
4047                 return rc;
4048
4049         push_len = qeth_add_hw_header(queue, skb, &hdr, hw_hdr_len, proto_len,
4050                                       &elements);
4051         if (push_len < 0)
4052                 return push_len;
4053         if (is_tso || !push_len) {
4054                 /* HW header needs its own buffer element. */
4055                 hd_len = hw_hdr_len + proto_len;
4056                 data_offset = push_len + proto_len;
4057         }
4058         memset(hdr, 0, hw_hdr_len);
4059         fill_header(queue, hdr, skb, ipv, frame_len);
4060         if (is_tso)
4061                 qeth_fill_tso_ext((struct qeth_hdr_tso *) hdr,
4062                                   frame_len - proto_len, skb, proto_len);
4063
4064         if (IS_IQD(card)) {
4065                 rc = __qeth_xmit(card, queue, skb, elements, hdr, data_offset,
4066                                  hd_len);
4067         } else {
4068                 /* TODO: drop skb_orphan() once TX completion is fast enough */
4069                 skb_orphan(skb);
4070                 rc = qeth_do_send_packet(card, queue, skb, hdr, data_offset,
4071                                          hd_len, elements);
4072         }
4073
4074         if (rc && !push_len)
4075                 kmem_cache_free(qeth_core_header_cache, hdr);
4076
4077         return rc;
4078 }
4079 EXPORT_SYMBOL_GPL(qeth_xmit);
4080
4081 static int qeth_setadp_promisc_mode_cb(struct qeth_card *card,
4082                 struct qeth_reply *reply, unsigned long data)
4083 {
4084         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4085         struct qeth_ipacmd_setadpparms *setparms;
4086
4087         QETH_CARD_TEXT(card, 4, "prmadpcb");
4088
4089         setparms = &(cmd->data.setadapterparms);
4090         if (qeth_setadpparms_inspect_rc(cmd)) {
4091                 QETH_CARD_TEXT_(card, 4, "prmrc%x", cmd->hdr.return_code);
4092                 setparms->data.mode = SET_PROMISC_MODE_OFF;
4093         }
4094         card->info.promisc_mode = setparms->data.mode;
4095         return (cmd->hdr.return_code) ? -EIO : 0;
4096 }
4097
4098 void qeth_setadp_promisc_mode(struct qeth_card *card, bool enable)
4099 {
4100         enum qeth_ipa_promisc_modes mode = enable ? SET_PROMISC_MODE_ON :
4101                                                     SET_PROMISC_MODE_OFF;
4102         struct qeth_cmd_buffer *iob;
4103         struct qeth_ipa_cmd *cmd;
4104
4105         QETH_CARD_TEXT(card, 4, "setprom");
4106         QETH_CARD_TEXT_(card, 4, "mode:%x", mode);
4107
4108         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE,
4109                                    SETADP_DATA_SIZEOF(mode));
4110         if (!iob)
4111                 return;
4112         cmd = __ipa_cmd(iob);
4113         cmd->data.setadapterparms.data.mode = mode;
4114         qeth_send_ipa_cmd(card, iob, qeth_setadp_promisc_mode_cb, NULL);
4115 }
4116 EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode);
4117
4118 static int qeth_setadpparms_change_macaddr_cb(struct qeth_card *card,
4119                 struct qeth_reply *reply, unsigned long data)
4120 {
4121         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4122         struct qeth_ipacmd_setadpparms *adp_cmd;
4123
4124         QETH_CARD_TEXT(card, 4, "chgmaccb");
4125         if (qeth_setadpparms_inspect_rc(cmd))
4126                 return -EIO;
4127
4128         adp_cmd = &cmd->data.setadapterparms;
4129         if (!is_valid_ether_addr(adp_cmd->data.change_addr.addr))
4130                 return -EADDRNOTAVAIL;
4131
4132         if (IS_LAYER2(card) && IS_OSD(card) && !IS_VM_NIC(card) &&
4133             !(adp_cmd->hdr.flags & QETH_SETADP_FLAGS_VIRTUAL_MAC))
4134                 return -EADDRNOTAVAIL;
4135
4136         ether_addr_copy(card->dev->dev_addr, adp_cmd->data.change_addr.addr);
4137         return 0;
4138 }
4139
4140 int qeth_setadpparms_change_macaddr(struct qeth_card *card)
4141 {
4142         int rc;
4143         struct qeth_cmd_buffer *iob;
4144         struct qeth_ipa_cmd *cmd;
4145
4146         QETH_CARD_TEXT(card, 4, "chgmac");
4147
4148         iob = qeth_get_adapter_cmd(card, IPA_SETADP_ALTER_MAC_ADDRESS,
4149                                    SETADP_DATA_SIZEOF(change_addr));
4150         if (!iob)
4151                 return -ENOMEM;
4152         cmd = __ipa_cmd(iob);
4153         cmd->data.setadapterparms.data.change_addr.cmd = CHANGE_ADDR_READ_MAC;
4154         cmd->data.setadapterparms.data.change_addr.addr_size = ETH_ALEN;
4155         ether_addr_copy(cmd->data.setadapterparms.data.change_addr.addr,
4156                         card->dev->dev_addr);
4157         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_change_macaddr_cb,
4158                                NULL);
4159         return rc;
4160 }
4161 EXPORT_SYMBOL_GPL(qeth_setadpparms_change_macaddr);
4162
4163 static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card,
4164                 struct qeth_reply *reply, unsigned long data)
4165 {
4166         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4167         struct qeth_set_access_ctrl *access_ctrl_req;
4168         int fallback = *(int *)reply->param;
4169
4170         QETH_CARD_TEXT(card, 4, "setaccb");
4171         if (cmd->hdr.return_code)
4172                 return -EIO;
4173         qeth_setadpparms_inspect_rc(cmd);
4174
4175         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4176         QETH_CARD_TEXT_(card, 2, "rc=%d",
4177                         cmd->data.setadapterparms.hdr.return_code);
4178         if (cmd->data.setadapterparms.hdr.return_code !=
4179                                                 SET_ACCESS_CTRL_RC_SUCCESS)
4180                 QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%#x) on device %x: %#x\n",
4181                                  access_ctrl_req->subcmd_code, CARD_DEVID(card),
4182                                  cmd->data.setadapterparms.hdr.return_code);
4183         switch (cmd->data.setadapterparms.hdr.return_code) {
4184         case SET_ACCESS_CTRL_RC_SUCCESS:
4185                 if (card->options.isolation == ISOLATION_MODE_NONE) {
4186                         dev_info(&card->gdev->dev,
4187                             "QDIO data connection isolation is deactivated\n");
4188                 } else {
4189                         dev_info(&card->gdev->dev,
4190                             "QDIO data connection isolation is activated\n");
4191                 }
4192                 break;
4193         case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
4194                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already deactivated\n",
4195                                  CARD_DEVID(card));
4196                 if (fallback)
4197                         card->options.isolation = card->options.prev_isolation;
4198                 break;
4199         case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
4200                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already activated\n",
4201                                  CARD_DEVID(card));
4202                 if (fallback)
4203                         card->options.isolation = card->options.prev_isolation;
4204                 break;
4205         case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
4206                 dev_err(&card->gdev->dev, "Adapter does not "
4207                         "support QDIO data connection isolation\n");
4208                 break;
4209         case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
4210                 dev_err(&card->gdev->dev,
4211                         "Adapter is dedicated. "
4212                         "QDIO data connection isolation not supported\n");
4213                 if (fallback)
4214                         card->options.isolation = card->options.prev_isolation;
4215                 break;
4216         case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
4217                 dev_err(&card->gdev->dev,
4218                         "TSO does not permit QDIO data connection isolation\n");
4219                 if (fallback)
4220                         card->options.isolation = card->options.prev_isolation;
4221                 break;
4222         case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED:
4223                 dev_err(&card->gdev->dev, "The adjacent switch port does not "
4224                         "support reflective relay mode\n");
4225                 if (fallback)
4226                         card->options.isolation = card->options.prev_isolation;
4227                 break;
4228         case SET_ACCESS_CTRL_RC_REFLREL_FAILED:
4229                 dev_err(&card->gdev->dev, "The reflective relay mode cannot be "
4230                                         "enabled at the adjacent switch port");
4231                 if (fallback)
4232                         card->options.isolation = card->options.prev_isolation;
4233                 break;
4234         case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED:
4235                 dev_warn(&card->gdev->dev, "Turning off reflective relay mode "
4236                                         "at the adjacent switch failed\n");
4237                 break;
4238         default:
4239                 /* this should never happen */
4240                 if (fallback)
4241                         card->options.isolation = card->options.prev_isolation;
4242                 break;
4243         }
4244         return (cmd->hdr.return_code) ? -EIO : 0;
4245 }
4246
4247 static int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
4248                 enum qeth_ipa_isolation_modes isolation, int fallback)
4249 {
4250         int rc;
4251         struct qeth_cmd_buffer *iob;
4252         struct qeth_ipa_cmd *cmd;
4253         struct qeth_set_access_ctrl *access_ctrl_req;
4254
4255         QETH_CARD_TEXT(card, 4, "setacctl");
4256
4257         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL,
4258                                    SETADP_DATA_SIZEOF(set_access_ctrl));
4259         if (!iob)
4260                 return -ENOMEM;
4261         cmd = __ipa_cmd(iob);
4262         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4263         access_ctrl_req->subcmd_code = isolation;
4264
4265         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb,
4266                                &fallback);
4267         QETH_CARD_TEXT_(card, 2, "rc=%d", rc);
4268         return rc;
4269 }
4270
4271 int qeth_set_access_ctrl_online(struct qeth_card *card, int fallback)
4272 {
4273         int rc = 0;
4274
4275         QETH_CARD_TEXT(card, 4, "setactlo");
4276
4277         if ((IS_OSD(card) || IS_OSX(card)) &&
4278             qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) {
4279                 rc = qeth_setadpparms_set_access_ctrl(card,
4280                         card->options.isolation, fallback);
4281                 if (rc) {
4282                         QETH_DBF_MESSAGE(3, "IPA(SET_ACCESS_CTRL(%d) on device %x: sent failed\n",
4283                                          rc, CARD_DEVID(card));
4284                         rc = -EOPNOTSUPP;
4285                 }
4286         } else if (card->options.isolation != ISOLATION_MODE_NONE) {
4287                 card->options.isolation = ISOLATION_MODE_NONE;
4288
4289                 dev_err(&card->gdev->dev, "Adapter does not "
4290                         "support QDIO data connection isolation\n");
4291                 rc = -EOPNOTSUPP;
4292         }
4293         return rc;
4294 }
4295
4296 void qeth_tx_timeout(struct net_device *dev)
4297 {
4298         struct qeth_card *card;
4299
4300         card = dev->ml_priv;
4301         QETH_CARD_TEXT(card, 4, "txtimeo");
4302         qeth_schedule_recovery(card);
4303 }
4304 EXPORT_SYMBOL_GPL(qeth_tx_timeout);
4305
4306 static int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum)
4307 {
4308         struct qeth_card *card = dev->ml_priv;
4309         int rc = 0;
4310
4311         switch (regnum) {
4312         case MII_BMCR: /* Basic mode control register */
4313                 rc = BMCR_FULLDPLX;
4314                 if ((card->info.link_type != QETH_LINK_TYPE_GBIT_ETH) &&
4315                     (card->info.link_type != QETH_LINK_TYPE_OSN) &&
4316                     (card->info.link_type != QETH_LINK_TYPE_10GBIT_ETH) &&
4317                     (card->info.link_type != QETH_LINK_TYPE_25GBIT_ETH))
4318                         rc |= BMCR_SPEED100;
4319                 break;
4320         case MII_BMSR: /* Basic mode status register */
4321                 rc = BMSR_ERCAP | BMSR_ANEGCOMPLETE | BMSR_LSTATUS |
4322                      BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | BMSR_100FULL |
4323                      BMSR_100BASE4;
4324                 break;
4325         case MII_PHYSID1: /* PHYS ID 1 */
4326                 rc = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 8) |
4327                      dev->dev_addr[2];
4328                 rc = (rc >> 5) & 0xFFFF;
4329                 break;
4330         case MII_PHYSID2: /* PHYS ID 2 */
4331                 rc = (dev->dev_addr[2] << 10) & 0xFFFF;
4332                 break;
4333         case MII_ADVERTISE: /* Advertisement control reg */
4334                 rc = ADVERTISE_ALL;
4335                 break;
4336         case MII_LPA: /* Link partner ability reg */
4337                 rc = LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL |
4338                      LPA_100BASE4 | LPA_LPACK;
4339                 break;
4340         case MII_EXPANSION: /* Expansion register */
4341                 break;
4342         case MII_DCOUNTER: /* disconnect counter */
4343                 break;
4344         case MII_FCSCOUNTER: /* false carrier counter */
4345                 break;
4346         case MII_NWAYTEST: /* N-way auto-neg test register */
4347                 break;
4348         case MII_RERRCOUNTER: /* rx error counter */
4349                 rc = card->stats.rx_errors;
4350                 break;
4351         case MII_SREVISION: /* silicon revision */
4352                 break;
4353         case MII_RESV1: /* reserved 1 */
4354                 break;
4355         case MII_LBRERROR: /* loopback, rx, bypass error */
4356                 break;
4357         case MII_PHYADDR: /* physical address */
4358                 break;
4359         case MII_RESV2: /* reserved 2 */
4360                 break;
4361         case MII_TPISTATUS: /* TPI status for 10mbps */
4362                 break;
4363         case MII_NCONFIG: /* network interface config */
4364                 break;
4365         default:
4366                 break;
4367         }
4368         return rc;
4369 }
4370
4371 static int qeth_snmp_command_cb(struct qeth_card *card,
4372                                 struct qeth_reply *reply, unsigned long data)
4373 {
4374         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4375         struct qeth_arp_query_info *qinfo = reply->param;
4376         struct qeth_ipacmd_setadpparms *adp_cmd;
4377         unsigned int data_len;
4378         void *snmp_data;
4379
4380         QETH_CARD_TEXT(card, 3, "snpcmdcb");
4381
4382         if (cmd->hdr.return_code) {
4383                 QETH_CARD_TEXT_(card, 4, "scer1%x", cmd->hdr.return_code);
4384                 return -EIO;
4385         }
4386         if (cmd->data.setadapterparms.hdr.return_code) {
4387                 cmd->hdr.return_code =
4388                         cmd->data.setadapterparms.hdr.return_code;
4389                 QETH_CARD_TEXT_(card, 4, "scer2%x", cmd->hdr.return_code);
4390                 return -EIO;
4391         }
4392
4393         adp_cmd = &cmd->data.setadapterparms;
4394         data_len = adp_cmd->hdr.cmdlength - sizeof(adp_cmd->hdr);
4395         if (adp_cmd->hdr.seq_no == 1) {
4396                 snmp_data = &adp_cmd->data.snmp;
4397         } else {
4398                 snmp_data = &adp_cmd->data.snmp.request;
4399                 data_len -= offsetof(struct qeth_snmp_cmd, request);
4400         }
4401
4402         /* check if there is enough room in userspace */
4403         if ((qinfo->udata_len - qinfo->udata_offset) < data_len) {
4404                 QETH_CARD_TEXT_(card, 4, "scer3%i", -ENOSPC);
4405                 return -ENOSPC;
4406         }
4407         QETH_CARD_TEXT_(card, 4, "snore%i",
4408                         cmd->data.setadapterparms.hdr.used_total);
4409         QETH_CARD_TEXT_(card, 4, "sseqn%i",
4410                         cmd->data.setadapterparms.hdr.seq_no);
4411         /*copy entries to user buffer*/
4412         memcpy(qinfo->udata + qinfo->udata_offset, snmp_data, data_len);
4413         qinfo->udata_offset += data_len;
4414
4415         if (cmd->data.setadapterparms.hdr.seq_no <
4416             cmd->data.setadapterparms.hdr.used_total)
4417                 return 1;
4418         return 0;
4419 }
4420
4421 static int qeth_snmp_command(struct qeth_card *card, char __user *udata)
4422 {
4423         struct qeth_snmp_ureq __user *ureq;
4424         struct qeth_cmd_buffer *iob;
4425         unsigned int req_len;
4426         struct qeth_arp_query_info qinfo = {0, };
4427         int rc = 0;
4428
4429         QETH_CARD_TEXT(card, 3, "snmpcmd");
4430
4431         if (IS_VM_NIC(card))
4432                 return -EOPNOTSUPP;
4433
4434         if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) &&
4435             IS_LAYER3(card))
4436                 return -EOPNOTSUPP;
4437
4438         ureq = (struct qeth_snmp_ureq __user *) udata;
4439         if (get_user(qinfo.udata_len, &ureq->hdr.data_len) ||
4440             get_user(req_len, &ureq->hdr.req_len))
4441                 return -EFAULT;
4442
4443         /* Sanitize user input, to avoid overflows in iob size calculation: */
4444         if (req_len > QETH_BUFSIZE)
4445                 return -EINVAL;
4446
4447         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL, req_len);
4448         if (!iob)
4449                 return -ENOMEM;
4450
4451         if (copy_from_user(&__ipa_cmd(iob)->data.setadapterparms.data.snmp,
4452                            &ureq->cmd, req_len)) {
4453                 qeth_put_cmd(iob);
4454                 return -EFAULT;
4455         }
4456
4457         qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
4458         if (!qinfo.udata) {
4459                 qeth_put_cmd(iob);
4460                 return -ENOMEM;
4461         }
4462         qinfo.udata_offset = sizeof(struct qeth_snmp_ureq_hdr);
4463
4464         rc = qeth_send_ipa_cmd(card, iob, qeth_snmp_command_cb, &qinfo);
4465         if (rc)
4466                 QETH_DBF_MESSAGE(2, "SNMP command failed on device %x: (%#x)\n",
4467                                  CARD_DEVID(card), rc);
4468         else {
4469                 if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
4470                         rc = -EFAULT;
4471         }
4472
4473         kfree(qinfo.udata);
4474         return rc;
4475 }
4476
4477 static int qeth_setadpparms_query_oat_cb(struct qeth_card *card,
4478                 struct qeth_reply *reply, unsigned long data)
4479 {
4480         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4481         struct qeth_qoat_priv *priv;
4482         char *resdata;
4483         int resdatalen;
4484
4485         QETH_CARD_TEXT(card, 3, "qoatcb");
4486         if (qeth_setadpparms_inspect_rc(cmd))
4487                 return -EIO;
4488
4489         priv = (struct qeth_qoat_priv *)reply->param;
4490         resdatalen = cmd->data.setadapterparms.hdr.cmdlength;
4491         resdata = (char *)data + 28;
4492
4493         if (resdatalen > (priv->buffer_len - priv->response_len))
4494                 return -ENOSPC;
4495
4496         memcpy((priv->buffer + priv->response_len), resdata,
4497                 resdatalen);
4498         priv->response_len += resdatalen;
4499
4500         if (cmd->data.setadapterparms.hdr.seq_no <
4501             cmd->data.setadapterparms.hdr.used_total)
4502                 return 1;
4503         return 0;
4504 }
4505
4506 static int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
4507 {
4508         int rc = 0;
4509         struct qeth_cmd_buffer *iob;
4510         struct qeth_ipa_cmd *cmd;
4511         struct qeth_query_oat *oat_req;
4512         struct qeth_query_oat_data oat_data;
4513         struct qeth_qoat_priv priv;
4514         void __user *tmp;
4515
4516         QETH_CARD_TEXT(card, 3, "qoatcmd");
4517
4518         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT)) {
4519                 rc = -EOPNOTSUPP;
4520                 goto out;
4521         }
4522
4523         if (copy_from_user(&oat_data, udata,
4524             sizeof(struct qeth_query_oat_data))) {
4525                         rc = -EFAULT;
4526                         goto out;
4527         }
4528
4529         priv.buffer_len = oat_data.buffer_len;
4530         priv.response_len = 0;
4531         priv.buffer = vzalloc(oat_data.buffer_len);
4532         if (!priv.buffer) {
4533                 rc = -ENOMEM;
4534                 goto out;
4535         }
4536
4537         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4538                                    SETADP_DATA_SIZEOF(query_oat));
4539         if (!iob) {
4540                 rc = -ENOMEM;
4541                 goto out_free;
4542         }
4543         cmd = __ipa_cmd(iob);
4544         oat_req = &cmd->data.setadapterparms.data.query_oat;
4545         oat_req->subcmd_code = oat_data.command;
4546
4547         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb,
4548                                &priv);
4549         if (!rc) {
4550                 if (is_compat_task())
4551                         tmp = compat_ptr(oat_data.ptr);
4552                 else
4553                         tmp = (void __user *)(unsigned long)oat_data.ptr;
4554
4555                 if (copy_to_user(tmp, priv.buffer,
4556                     priv.response_len)) {
4557                         rc = -EFAULT;
4558                         goto out_free;
4559                 }
4560
4561                 oat_data.response_len = priv.response_len;
4562
4563                 if (copy_to_user(udata, &oat_data,
4564                     sizeof(struct qeth_query_oat_data)))
4565                         rc = -EFAULT;
4566         }
4567
4568 out_free:
4569         vfree(priv.buffer);
4570 out:
4571         return rc;
4572 }
4573
4574 static int qeth_query_card_info_cb(struct qeth_card *card,
4575                                    struct qeth_reply *reply, unsigned long data)
4576 {
4577         struct carrier_info *carrier_info = (struct carrier_info *)reply->param;
4578         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4579         struct qeth_query_card_info *card_info;
4580
4581         QETH_CARD_TEXT(card, 2, "qcrdincb");
4582         if (qeth_setadpparms_inspect_rc(cmd))
4583                 return -EIO;
4584
4585         card_info = &cmd->data.setadapterparms.data.card_info;
4586         carrier_info->card_type = card_info->card_type;
4587         carrier_info->port_mode = card_info->port_mode;
4588         carrier_info->port_speed = card_info->port_speed;
4589         return 0;
4590 }
4591
4592 int qeth_query_card_info(struct qeth_card *card,
4593                          struct carrier_info *carrier_info)
4594 {
4595         struct qeth_cmd_buffer *iob;
4596
4597         QETH_CARD_TEXT(card, 2, "qcrdinfo");
4598         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_CARD_INFO))
4599                 return -EOPNOTSUPP;
4600         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_CARD_INFO, 0);
4601         if (!iob)
4602                 return -ENOMEM;
4603         return qeth_send_ipa_cmd(card, iob, qeth_query_card_info_cb,
4604                                         (void *)carrier_info);
4605 }
4606
4607 /**
4608  * qeth_vm_request_mac() - Request a hypervisor-managed MAC address
4609  * @card: pointer to a qeth_card
4610  *
4611  * Returns
4612  *      0, if a MAC address has been set for the card's netdevice
4613  *      a return code, for various error conditions
4614  */
4615 int qeth_vm_request_mac(struct qeth_card *card)
4616 {
4617         struct diag26c_mac_resp *response;
4618         struct diag26c_mac_req *request;
4619         struct ccw_dev_id id;
4620         int rc;
4621
4622         QETH_CARD_TEXT(card, 2, "vmreqmac");
4623
4624         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
4625         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
4626         if (!request || !response) {
4627                 rc = -ENOMEM;
4628                 goto out;
4629         }
4630
4631         ccw_device_get_id(CARD_DDEV(card), &id);
4632         request->resp_buf_len = sizeof(*response);
4633         request->resp_version = DIAG26C_VERSION2;
4634         request->op_code = DIAG26C_GET_MAC;
4635         request->devno = id.devno;
4636
4637         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4638         rc = diag26c(request, response, DIAG26C_MAC_SERVICES);
4639         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4640         if (rc)
4641                 goto out;
4642         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
4643
4644         if (request->resp_buf_len < sizeof(*response) ||
4645             response->version != request->resp_version) {
4646                 rc = -EIO;
4647                 QETH_CARD_TEXT(card, 2, "badresp");
4648                 QETH_CARD_HEX(card, 2, &request->resp_buf_len,
4649                               sizeof(request->resp_buf_len));
4650         } else if (!is_valid_ether_addr(response->mac)) {
4651                 rc = -EINVAL;
4652                 QETH_CARD_TEXT(card, 2, "badmac");
4653                 QETH_CARD_HEX(card, 2, response->mac, ETH_ALEN);
4654         } else {
4655                 ether_addr_copy(card->dev->dev_addr, response->mac);
4656         }
4657
4658 out:
4659         kfree(response);
4660         kfree(request);
4661         return rc;
4662 }
4663 EXPORT_SYMBOL_GPL(qeth_vm_request_mac);
4664
4665 static void qeth_determine_capabilities(struct qeth_card *card)
4666 {
4667         int rc;
4668         struct ccw_device *ddev;
4669         int ddev_offline = 0;
4670
4671         QETH_CARD_TEXT(card, 2, "detcapab");
4672         ddev = CARD_DDEV(card);
4673         if (!ddev->online) {
4674                 ddev_offline = 1;
4675                 rc = ccw_device_set_online(ddev);
4676                 if (rc) {
4677                         QETH_CARD_TEXT_(card, 2, "3err%d", rc);
4678                         goto out;
4679                 }
4680         }
4681
4682         rc = qeth_read_conf_data(card);
4683         if (rc) {
4684                 QETH_DBF_MESSAGE(2, "qeth_read_conf_data on device %x returned %i\n",
4685                                  CARD_DEVID(card), rc);
4686                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
4687                 goto out_offline;
4688         }
4689
4690         rc = qdio_get_ssqd_desc(ddev, &card->ssqd);
4691         if (rc)
4692                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
4693
4694         QETH_CARD_TEXT_(card, 2, "qfmt%d", card->ssqd.qfmt);
4695         QETH_CARD_TEXT_(card, 2, "ac1:%02x", card->ssqd.qdioac1);
4696         QETH_CARD_TEXT_(card, 2, "ac2:%04x", card->ssqd.qdioac2);
4697         QETH_CARD_TEXT_(card, 2, "ac3:%04x", card->ssqd.qdioac3);
4698         QETH_CARD_TEXT_(card, 2, "icnt%d", card->ssqd.icnt);
4699         if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) ||
4700             ((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) ||
4701             ((card->ssqd.qdioac3 & CHSC_AC3_FORMAT2_CQ_AVAILABLE) == 0))) {
4702                 dev_info(&card->gdev->dev,
4703                         "Completion Queueing supported\n");
4704         } else {
4705                 card->options.cq = QETH_CQ_NOTAVAILABLE;
4706         }
4707
4708
4709 out_offline:
4710         if (ddev_offline == 1)
4711                 ccw_device_set_offline(ddev);
4712 out:
4713         return;
4714 }
4715
4716 static void qeth_qdio_establish_cq(struct qeth_card *card,
4717                                    struct qdio_buffer **in_sbal_ptrs,
4718                                    void (**queue_start_poll)
4719                                         (struct ccw_device *, int,
4720                                          unsigned long))
4721 {
4722         int i;
4723
4724         if (card->options.cq == QETH_CQ_ENABLED) {
4725                 int offset = QDIO_MAX_BUFFERS_PER_Q *
4726                              (card->qdio.no_in_queues - 1);
4727                 for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i) {
4728                         in_sbal_ptrs[offset + i] = (struct qdio_buffer *)
4729                                 virt_to_phys(card->qdio.c_q->bufs[i].buffer);
4730                 }
4731
4732                 queue_start_poll[card->qdio.no_in_queues - 1] = NULL;
4733         }
4734 }
4735
4736 static int qeth_qdio_establish(struct qeth_card *card)
4737 {
4738         struct qdio_initialize init_data;
4739         char *qib_param_field;
4740         struct qdio_buffer **in_sbal_ptrs;
4741         void (**queue_start_poll) (struct ccw_device *, int, unsigned long);
4742         struct qdio_buffer **out_sbal_ptrs;
4743         int i, j, k;
4744         int rc = 0;
4745
4746         QETH_CARD_TEXT(card, 2, "qdioest");
4747
4748         qib_param_field = kzalloc(FIELD_SIZEOF(struct qib, parm), GFP_KERNEL);
4749         if (!qib_param_field) {
4750                 rc =  -ENOMEM;
4751                 goto out_free_nothing;
4752         }
4753
4754         qeth_create_qib_param_field(card, qib_param_field);
4755         qeth_create_qib_param_field_blkt(card, qib_param_field);
4756
4757         in_sbal_ptrs = kcalloc(card->qdio.no_in_queues * QDIO_MAX_BUFFERS_PER_Q,
4758                                sizeof(void *),
4759                                GFP_KERNEL);
4760         if (!in_sbal_ptrs) {
4761                 rc = -ENOMEM;
4762                 goto out_free_qib_param;
4763         }
4764         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i) {
4765                 in_sbal_ptrs[i] = (struct qdio_buffer *)
4766                         virt_to_phys(card->qdio.in_q->bufs[i].buffer);
4767         }
4768
4769         queue_start_poll = kcalloc(card->qdio.no_in_queues, sizeof(void *),
4770                                    GFP_KERNEL);
4771         if (!queue_start_poll) {
4772                 rc = -ENOMEM;
4773                 goto out_free_in_sbals;
4774         }
4775         for (i = 0; i < card->qdio.no_in_queues; ++i)
4776                 queue_start_poll[i] = qeth_qdio_start_poll;
4777
4778         qeth_qdio_establish_cq(card, in_sbal_ptrs, queue_start_poll);
4779
4780         out_sbal_ptrs =
4781                 kcalloc(card->qdio.no_out_queues * QDIO_MAX_BUFFERS_PER_Q,
4782                         sizeof(void *),
4783                         GFP_KERNEL);
4784         if (!out_sbal_ptrs) {
4785                 rc = -ENOMEM;
4786                 goto out_free_queue_start_poll;
4787         }
4788         for (i = 0, k = 0; i < card->qdio.no_out_queues; ++i)
4789                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j, ++k) {
4790                         out_sbal_ptrs[k] = (struct qdio_buffer *)virt_to_phys(
4791                                 card->qdio.out_qs[i]->bufs[j]->buffer);
4792                 }
4793
4794         memset(&init_data, 0, sizeof(struct qdio_initialize));
4795         init_data.cdev                   = CARD_DDEV(card);
4796         init_data.q_format               = IS_IQD(card) ? QDIO_IQDIO_QFMT :
4797                                                           QDIO_QETH_QFMT;
4798         init_data.qib_param_field_format = 0;
4799         init_data.qib_param_field        = qib_param_field;
4800         init_data.no_input_qs            = card->qdio.no_in_queues;
4801         init_data.no_output_qs           = card->qdio.no_out_queues;
4802         init_data.input_handler          = qeth_qdio_input_handler;
4803         init_data.output_handler         = qeth_qdio_output_handler;
4804         init_data.queue_start_poll_array = queue_start_poll;
4805         init_data.int_parm               = (unsigned long) card;
4806         init_data.input_sbal_addr_array  = in_sbal_ptrs;
4807         init_data.output_sbal_addr_array = out_sbal_ptrs;
4808         init_data.output_sbal_state_array = card->qdio.out_bufstates;
4809         init_data.scan_threshold         = IS_IQD(card) ? 0 : 32;
4810
4811         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED,
4812                 QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) {
4813                 rc = qdio_allocate(&init_data);
4814                 if (rc) {
4815                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
4816                         goto out;
4817                 }
4818                 rc = qdio_establish(&init_data);
4819                 if (rc) {
4820                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
4821                         qdio_free(CARD_DDEV(card));
4822                 }
4823         }
4824
4825         switch (card->options.cq) {
4826         case QETH_CQ_ENABLED:
4827                 dev_info(&card->gdev->dev, "Completion Queue support enabled");
4828                 break;
4829         case QETH_CQ_DISABLED:
4830                 dev_info(&card->gdev->dev, "Completion Queue support disabled");
4831                 break;
4832         default:
4833                 break;
4834         }
4835 out:
4836         kfree(out_sbal_ptrs);
4837 out_free_queue_start_poll:
4838         kfree(queue_start_poll);
4839 out_free_in_sbals:
4840         kfree(in_sbal_ptrs);
4841 out_free_qib_param:
4842         kfree(qib_param_field);
4843 out_free_nothing:
4844         return rc;
4845 }
4846
4847 static void qeth_core_free_card(struct qeth_card *card)
4848 {
4849         QETH_CARD_TEXT(card, 2, "freecrd");
4850         qeth_clean_channel(&card->read);
4851         qeth_clean_channel(&card->write);
4852         qeth_clean_channel(&card->data);
4853         qeth_put_cmd(card->read_cmd);
4854         destroy_workqueue(card->event_wq);
4855         qeth_free_qdio_queues(card);
4856         unregister_service_level(&card->qeth_service_level);
4857         dev_set_drvdata(&card->gdev->dev, NULL);
4858         kfree(card);
4859 }
4860
4861 void qeth_trace_features(struct qeth_card *card)
4862 {
4863         QETH_CARD_TEXT(card, 2, "features");
4864         QETH_CARD_HEX(card, 2, &card->options.ipa4, sizeof(card->options.ipa4));
4865         QETH_CARD_HEX(card, 2, &card->options.ipa6, sizeof(card->options.ipa6));
4866         QETH_CARD_HEX(card, 2, &card->options.adp, sizeof(card->options.adp));
4867         QETH_CARD_HEX(card, 2, &card->info.diagass_support,
4868                       sizeof(card->info.diagass_support));
4869 }
4870 EXPORT_SYMBOL_GPL(qeth_trace_features);
4871
4872 static struct ccw_device_id qeth_ids[] = {
4873         {CCW_DEVICE_DEVTYPE(0x1731, 0x01, 0x1732, 0x01),
4874                                         .driver_info = QETH_CARD_TYPE_OSD},
4875         {CCW_DEVICE_DEVTYPE(0x1731, 0x05, 0x1732, 0x05),
4876                                         .driver_info = QETH_CARD_TYPE_IQD},
4877         {CCW_DEVICE_DEVTYPE(0x1731, 0x06, 0x1732, 0x06),
4878                                         .driver_info = QETH_CARD_TYPE_OSN},
4879         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x03),
4880                                         .driver_info = QETH_CARD_TYPE_OSM},
4881         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x02),
4882                                         .driver_info = QETH_CARD_TYPE_OSX},
4883         {},
4884 };
4885 MODULE_DEVICE_TABLE(ccw, qeth_ids);
4886
4887 static struct ccw_driver qeth_ccw_driver = {
4888         .driver = {
4889                 .owner = THIS_MODULE,
4890                 .name = "qeth",
4891         },
4892         .ids = qeth_ids,
4893         .probe = ccwgroup_probe_ccwdev,
4894         .remove = ccwgroup_remove_ccwdev,
4895 };
4896
4897 int qeth_core_hardsetup_card(struct qeth_card *card, bool *carrier_ok)
4898 {
4899         int retries = 3;
4900         int rc;
4901
4902         QETH_CARD_TEXT(card, 2, "hrdsetup");
4903         atomic_set(&card->force_alloc_skb, 0);
4904         rc = qeth_update_from_chp_desc(card);
4905         if (rc)
4906                 return rc;
4907 retry:
4908         if (retries < 3)
4909                 QETH_DBF_MESSAGE(2, "Retrying to do IDX activates on device %x.\n",
4910                                  CARD_DEVID(card));
4911         rc = qeth_qdio_clear_card(card, !IS_IQD(card));
4912         ccw_device_set_offline(CARD_DDEV(card));
4913         ccw_device_set_offline(CARD_WDEV(card));
4914         ccw_device_set_offline(CARD_RDEV(card));
4915         qdio_free(CARD_DDEV(card));
4916         rc = ccw_device_set_online(CARD_RDEV(card));
4917         if (rc)
4918                 goto retriable;
4919         rc = ccw_device_set_online(CARD_WDEV(card));
4920         if (rc)
4921                 goto retriable;
4922         rc = ccw_device_set_online(CARD_DDEV(card));
4923         if (rc)
4924                 goto retriable;
4925 retriable:
4926         if (rc == -ERESTARTSYS) {
4927                 QETH_CARD_TEXT(card, 2, "break1");
4928                 return rc;
4929         } else if (rc) {
4930                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
4931                 if (--retries < 0)
4932                         goto out;
4933                 else
4934                         goto retry;
4935         }
4936         qeth_determine_capabilities(card);
4937         qeth_init_tokens(card);
4938         qeth_init_func_level(card);
4939
4940         rc = qeth_idx_activate_read_channel(card);
4941         if (rc == -EINTR) {
4942                 QETH_CARD_TEXT(card, 2, "break2");
4943                 return rc;
4944         } else if (rc) {
4945                 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
4946                 if (--retries < 0)
4947                         goto out;
4948                 else
4949                         goto retry;
4950         }
4951
4952         rc = qeth_idx_activate_write_channel(card);
4953         if (rc == -EINTR) {
4954                 QETH_CARD_TEXT(card, 2, "break3");
4955                 return rc;
4956         } else if (rc) {
4957                 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
4958                 if (--retries < 0)
4959                         goto out;
4960                 else
4961                         goto retry;
4962         }
4963         card->read_or_write_problem = 0;
4964         rc = qeth_mpc_initialize(card);
4965         if (rc) {
4966                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
4967                 goto out;
4968         }
4969
4970         rc = qeth_send_startlan(card);
4971         if (rc) {
4972                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
4973                 if (rc == -ENETDOWN) {
4974                         dev_warn(&card->gdev->dev, "The LAN is offline\n");
4975                         *carrier_ok = false;
4976                 } else {
4977                         goto out;
4978                 }
4979         } else {
4980                 *carrier_ok = true;
4981         }
4982
4983         card->options.ipa4.supported_funcs = 0;
4984         card->options.ipa6.supported_funcs = 0;
4985         card->options.adp.supported_funcs = 0;
4986         card->options.sbp.supported_funcs = 0;
4987         card->info.diagass_support = 0;
4988         rc = qeth_query_ipassists(card, QETH_PROT_IPV4);
4989         if (rc == -ENOMEM)
4990                 goto out;
4991         if (qeth_is_supported(card, IPA_IPV6)) {
4992                 rc = qeth_query_ipassists(card, QETH_PROT_IPV6);
4993                 if (rc == -ENOMEM)
4994                         goto out;
4995         }
4996         if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
4997                 rc = qeth_query_setadapterparms(card);
4998                 if (rc < 0) {
4999                         QETH_CARD_TEXT_(card, 2, "7err%d", rc);
5000                         goto out;
5001                 }
5002         }
5003         if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
5004                 rc = qeth_query_setdiagass(card);
5005                 if (rc < 0) {
5006                         QETH_CARD_TEXT_(card, 2, "8err%d", rc);
5007                         goto out;
5008                 }
5009         }
5010
5011         if (!qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP) ||
5012             (card->info.hwtrap && qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM)))
5013                 card->info.hwtrap = 0;
5014
5015         rc = qeth_set_access_ctrl_online(card, 0);
5016         if (rc)
5017                 goto out;
5018
5019         return 0;
5020 out:
5021         dev_warn(&card->gdev->dev, "The qeth device driver failed to recover "
5022                 "an error on the device\n");
5023         QETH_DBF_MESSAGE(2, "Initialization for device %x failed in hardsetup! rc=%d\n",
5024                          CARD_DEVID(card), rc);
5025         return rc;
5026 }
5027 EXPORT_SYMBOL_GPL(qeth_core_hardsetup_card);
5028
5029 static void qeth_create_skb_frag(struct qdio_buffer_element *element,
5030                                  struct sk_buff *skb, int offset, int data_len)
5031 {
5032         struct page *page = virt_to_page(element->addr);
5033         unsigned int next_frag;
5034
5035         /* first fill the linear space */
5036         if (!skb->len) {
5037                 unsigned int linear = min(data_len, skb_tailroom(skb));
5038
5039                 skb_put_data(skb, element->addr + offset, linear);
5040                 data_len -= linear;
5041                 if (!data_len)
5042                         return;
5043                 offset += linear;
5044                 /* fall through to add page frag for remaining data */
5045         }
5046
5047         next_frag = skb_shinfo(skb)->nr_frags;
5048         get_page(page);
5049         skb_add_rx_frag(skb, next_frag, page, offset, data_len, data_len);
5050 }
5051
5052 static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale)
5053 {
5054         return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY);
5055 }
5056
5057 struct sk_buff *qeth_core_get_next_skb(struct qeth_card *card,
5058                 struct qeth_qdio_buffer *qethbuffer,
5059                 struct qdio_buffer_element **__element, int *__offset,
5060                 struct qeth_hdr **hdr)
5061 {
5062         struct qdio_buffer_element *element = *__element;
5063         struct qdio_buffer *buffer = qethbuffer->buffer;
5064         int offset = *__offset;
5065         struct sk_buff *skb;
5066         int skb_len = 0;
5067         void *data_ptr;
5068         int data_len;
5069         int headroom = 0;
5070         int use_rx_sg = 0;
5071
5072         /* qeth_hdr must not cross element boundaries */
5073         while (element->length < offset + sizeof(struct qeth_hdr)) {
5074                 if (qeth_is_last_sbale(element))
5075                         return NULL;
5076                 element++;
5077                 offset = 0;
5078         }
5079         *hdr = element->addr + offset;
5080
5081         offset += sizeof(struct qeth_hdr);
5082         switch ((*hdr)->hdr.l2.id) {
5083         case QETH_HEADER_TYPE_LAYER2:
5084                 skb_len = (*hdr)->hdr.l2.pkt_length;
5085                 break;
5086         case QETH_HEADER_TYPE_LAYER3:
5087                 skb_len = (*hdr)->hdr.l3.length;
5088                 headroom = ETH_HLEN;
5089                 break;
5090         case QETH_HEADER_TYPE_OSN:
5091                 skb_len = (*hdr)->hdr.osn.pdu_length;
5092                 headroom = sizeof(struct qeth_hdr);
5093                 break;
5094         default:
5095                 break;
5096         }
5097
5098         if (!skb_len)
5099                 return NULL;
5100
5101         if (((skb_len >= card->options.rx_sg_cb) &&
5102              !IS_OSN(card) &&
5103              (!atomic_read(&card->force_alloc_skb))) ||
5104             (card->options.cq == QETH_CQ_ENABLED))
5105                 use_rx_sg = 1;
5106
5107         if (use_rx_sg && qethbuffer->rx_skb) {
5108                 /* QETH_CQ_ENABLED only: */
5109                 skb = qethbuffer->rx_skb;
5110                 qethbuffer->rx_skb = NULL;
5111         } else {
5112                 unsigned int linear = (use_rx_sg) ? QETH_RX_PULL_LEN : skb_len;
5113
5114                 skb = napi_alloc_skb(&card->napi, linear + headroom);
5115         }
5116         if (!skb)
5117                 goto no_mem;
5118         if (headroom)
5119                 skb_reserve(skb, headroom);
5120
5121         data_ptr = element->addr + offset;
5122         while (skb_len) {
5123                 data_len = min(skb_len, (int)(element->length - offset));
5124                 if (data_len) {
5125                         if (use_rx_sg)
5126                                 qeth_create_skb_frag(element, skb, offset,
5127                                                      data_len);
5128                         else
5129                                 skb_put_data(skb, data_ptr, data_len);
5130                 }
5131                 skb_len -= data_len;
5132                 if (skb_len) {
5133                         if (qeth_is_last_sbale(element)) {
5134                                 QETH_CARD_TEXT(card, 4, "unexeob");
5135                                 QETH_CARD_HEX(card, 2, buffer, sizeof(void *));
5136                                 dev_kfree_skb_any(skb);
5137                                 QETH_CARD_STAT_INC(card, rx_errors);
5138                                 return NULL;
5139                         }
5140                         element++;
5141                         offset = 0;
5142                         data_ptr = element->addr;
5143                 } else {
5144                         offset += data_len;
5145                 }
5146         }
5147         *__element = element;
5148         *__offset = offset;
5149         if (use_rx_sg) {
5150                 QETH_CARD_STAT_INC(card, rx_sg_skbs);
5151                 QETH_CARD_STAT_ADD(card, rx_sg_frags,
5152                                    skb_shinfo(skb)->nr_frags);
5153         }
5154         return skb;
5155 no_mem:
5156         if (net_ratelimit()) {
5157                 QETH_CARD_TEXT(card, 2, "noskbmem");
5158         }
5159         QETH_CARD_STAT_INC(card, rx_dropped);
5160         return NULL;
5161 }
5162 EXPORT_SYMBOL_GPL(qeth_core_get_next_skb);
5163
5164 int qeth_poll(struct napi_struct *napi, int budget)
5165 {
5166         struct qeth_card *card = container_of(napi, struct qeth_card, napi);
5167         int work_done = 0;
5168         struct qeth_qdio_buffer *buffer;
5169         int done;
5170         int new_budget = budget;
5171
5172         while (1) {
5173                 if (!card->rx.b_count) {
5174                         card->rx.qdio_err = 0;
5175                         card->rx.b_count = qdio_get_next_buffers(
5176                                 card->data.ccwdev, 0, &card->rx.b_index,
5177                                 &card->rx.qdio_err);
5178                         if (card->rx.b_count <= 0) {
5179                                 card->rx.b_count = 0;
5180                                 break;
5181                         }
5182                         card->rx.b_element =
5183                                 &card->qdio.in_q->bufs[card->rx.b_index]
5184                                 .buffer->element[0];
5185                         card->rx.e_offset = 0;
5186                 }
5187
5188                 while (card->rx.b_count) {
5189                         buffer = &card->qdio.in_q->bufs[card->rx.b_index];
5190                         if (!(card->rx.qdio_err &&
5191                             qeth_check_qdio_errors(card, buffer->buffer,
5192                             card->rx.qdio_err, "qinerr")))
5193                                 work_done +=
5194                                         card->discipline->process_rx_buffer(
5195                                                 card, new_budget, &done);
5196                         else
5197                                 done = 1;
5198
5199                         if (done) {
5200                                 QETH_CARD_STAT_INC(card, rx_bufs);
5201                                 qeth_put_buffer_pool_entry(card,
5202                                         buffer->pool_entry);
5203                                 qeth_queue_input_buffer(card, card->rx.b_index);
5204                                 card->rx.b_count--;
5205                                 if (card->rx.b_count) {
5206                                         card->rx.b_index =
5207                                                 QDIO_BUFNR(card->rx.b_index + 1);
5208                                         card->rx.b_element =
5209                                                 &card->qdio.in_q
5210                                                 ->bufs[card->rx.b_index]
5211                                                 .buffer->element[0];
5212                                         card->rx.e_offset = 0;
5213                                 }
5214                         }
5215
5216                         if (work_done >= budget)
5217                                 goto out;
5218                         else
5219                                 new_budget = budget - work_done;
5220                 }
5221         }
5222
5223         if (napi_complete_done(napi, work_done) &&
5224             qdio_start_irq(CARD_DDEV(card), 0))
5225                 napi_schedule(napi);
5226 out:
5227         return work_done;
5228 }
5229 EXPORT_SYMBOL_GPL(qeth_poll);
5230
5231 static void qeth_iqd_tx_complete(struct qeth_qdio_out_q *queue,
5232                                  unsigned int bidx, bool error, int budget)
5233 {
5234         struct qeth_qdio_out_buffer *buffer = queue->bufs[bidx];
5235         u8 sflags = buffer->buffer->element[15].sflags;
5236         struct qeth_card *card = queue->card;
5237
5238         if (queue->bufstates && (queue->bufstates[bidx].flags &
5239                                  QDIO_OUTBUF_STATE_FLAG_PENDING)) {
5240                 WARN_ON_ONCE(card->options.cq != QETH_CQ_ENABLED);
5241
5242                 if (atomic_cmpxchg(&buffer->state, QETH_QDIO_BUF_PRIMED,
5243                                                    QETH_QDIO_BUF_PENDING) ==
5244                     QETH_QDIO_BUF_PRIMED)
5245                         qeth_notify_skbs(queue, buffer, TX_NOTIFY_PENDING);
5246
5247                 QETH_CARD_TEXT_(card, 5, "pel%u", bidx);
5248
5249                 /* prepare the queue slot for re-use: */
5250                 qeth_scrub_qdio_buffer(buffer->buffer, queue->max_elements);
5251                 if (qeth_init_qdio_out_buf(queue, bidx)) {
5252                         QETH_CARD_TEXT(card, 2, "outofbuf");
5253                         qeth_schedule_recovery(card);
5254                 }
5255
5256                 return;
5257         }
5258
5259         if (card->options.cq == QETH_CQ_ENABLED)
5260                 qeth_notify_skbs(queue, buffer,
5261                                  qeth_compute_cq_notification(sflags, 0));
5262         qeth_clear_output_buffer(queue, buffer, error, budget);
5263 }
5264
5265 static int qeth_tx_poll(struct napi_struct *napi, int budget)
5266 {
5267         struct qeth_qdio_out_q *queue = qeth_napi_to_out_queue(napi);
5268         unsigned int queue_no = queue->queue_no;
5269         struct qeth_card *card = queue->card;
5270         struct net_device *dev = card->dev;
5271         unsigned int work_done = 0;
5272         struct netdev_queue *txq;
5273
5274         txq = netdev_get_tx_queue(dev, qeth_iqd_translate_txq(dev, queue_no));
5275
5276         while (1) {
5277                 unsigned int start, error, i;
5278                 unsigned int packets = 0;
5279                 unsigned int bytes = 0;
5280                 int completed;
5281
5282                 if (qeth_out_queue_is_empty(queue)) {
5283                         napi_complete(napi);
5284                         return 0;
5285                 }
5286
5287                 /* Give the CPU a breather: */
5288                 if (work_done >= QDIO_MAX_BUFFERS_PER_Q) {
5289                         QETH_TXQ_STAT_INC(queue, completion_yield);
5290                         if (napi_complete_done(napi, 0))
5291                                 napi_schedule(napi);
5292                         return 0;
5293                 }
5294
5295                 completed = qdio_inspect_queue(CARD_DDEV(card), queue_no, false,
5296                                                &start, &error);
5297                 if (completed <= 0) {
5298                         /* Ensure we see TX completion for pending work: */
5299                         if (napi_complete_done(napi, 0))
5300                                 qeth_tx_arm_timer(queue);
5301                         return 0;
5302                 }
5303
5304                 for (i = start; i < start + completed; i++) {
5305                         struct qeth_qdio_out_buffer *buffer;
5306                         unsigned int bidx = QDIO_BUFNR(i);
5307
5308                         buffer = queue->bufs[bidx];
5309                         packets += skb_queue_len(&buffer->skb_list);
5310                         bytes += buffer->bytes;
5311
5312                         qeth_handle_send_error(card, buffer, error);
5313                         qeth_iqd_tx_complete(queue, bidx, error, budget);
5314                         qeth_cleanup_handled_pending(queue, bidx, false);
5315                 }
5316
5317                 netdev_tx_completed_queue(txq, packets, bytes);
5318                 atomic_sub(completed, &queue->used_buffers);
5319                 work_done += completed;
5320
5321                 /* xmit may have observed the full-condition, but not yet
5322                  * stopped the txq. In which case the code below won't trigger.
5323                  * So before returning, xmit will re-check the txq's fill level
5324                  * and wake it up if needed.
5325                  */
5326                 if (netif_tx_queue_stopped(txq) &&
5327                     !qeth_out_queue_is_full(queue))
5328                         netif_tx_wake_queue(txq);
5329         }
5330 }
5331
5332 static int qeth_setassparms_inspect_rc(struct qeth_ipa_cmd *cmd)
5333 {
5334         if (!cmd->hdr.return_code)
5335                 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
5336         return cmd->hdr.return_code;
5337 }
5338
5339 static int qeth_setassparms_get_caps_cb(struct qeth_card *card,
5340                                         struct qeth_reply *reply,
5341                                         unsigned long data)
5342 {
5343         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5344         struct qeth_ipa_caps *caps = reply->param;
5345
5346         if (qeth_setassparms_inspect_rc(cmd))
5347                 return -EIO;
5348
5349         caps->supported = cmd->data.setassparms.data.caps.supported;
5350         caps->enabled = cmd->data.setassparms.data.caps.enabled;
5351         return 0;
5352 }
5353
5354 int qeth_setassparms_cb(struct qeth_card *card,
5355                         struct qeth_reply *reply, unsigned long data)
5356 {
5357         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5358
5359         QETH_CARD_TEXT(card, 4, "defadpcb");
5360
5361         if (cmd->hdr.return_code)
5362                 return -EIO;
5363
5364         cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
5365         if (cmd->hdr.prot_version == QETH_PROT_IPV4)
5366                 card->options.ipa4.enabled_funcs = cmd->hdr.ipa_enabled;
5367         if (cmd->hdr.prot_version == QETH_PROT_IPV6)
5368                 card->options.ipa6.enabled_funcs = cmd->hdr.ipa_enabled;
5369         return 0;
5370 }
5371 EXPORT_SYMBOL_GPL(qeth_setassparms_cb);
5372
5373 struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card,
5374                                                  enum qeth_ipa_funcs ipa_func,
5375                                                  u16 cmd_code,
5376                                                  unsigned int data_length,
5377                                                  enum qeth_prot_versions prot)
5378 {
5379         struct qeth_ipacmd_setassparms *setassparms;
5380         struct qeth_ipacmd_setassparms_hdr *hdr;
5381         struct qeth_cmd_buffer *iob;
5382
5383         QETH_CARD_TEXT(card, 4, "getasscm");
5384         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETASSPARMS, prot,
5385                                  data_length +
5386                                  offsetof(struct qeth_ipacmd_setassparms,
5387                                           data));
5388         if (!iob)
5389                 return NULL;
5390
5391         setassparms = &__ipa_cmd(iob)->data.setassparms;
5392         setassparms->assist_no = ipa_func;
5393
5394         hdr = &setassparms->hdr;
5395         hdr->length = sizeof(*hdr) + data_length;
5396         hdr->command_code = cmd_code;
5397         return iob;
5398 }
5399 EXPORT_SYMBOL_GPL(qeth_get_setassparms_cmd);
5400
5401 int qeth_send_simple_setassparms_prot(struct qeth_card *card,
5402                                       enum qeth_ipa_funcs ipa_func,
5403                                       u16 cmd_code, u32 *data,
5404                                       enum qeth_prot_versions prot)
5405 {
5406         unsigned int length = data ? SETASS_DATA_SIZEOF(flags_32bit) : 0;
5407         struct qeth_cmd_buffer *iob;
5408
5409         QETH_CARD_TEXT_(card, 4, "simassp%i", prot);
5410         iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code, length, prot);
5411         if (!iob)
5412                 return -ENOMEM;
5413
5414         if (data)
5415                 __ipa_cmd(iob)->data.setassparms.data.flags_32bit = *data;
5416         return qeth_send_ipa_cmd(card, iob, qeth_setassparms_cb, NULL);
5417 }
5418 EXPORT_SYMBOL_GPL(qeth_send_simple_setassparms_prot);
5419
5420 static void qeth_unregister_dbf_views(void)
5421 {
5422         int x;
5423         for (x = 0; x < QETH_DBF_INFOS; x++) {
5424                 debug_unregister(qeth_dbf[x].id);
5425                 qeth_dbf[x].id = NULL;
5426         }
5427 }
5428
5429 void qeth_dbf_longtext(debug_info_t *id, int level, char *fmt, ...)
5430 {
5431         char dbf_txt_buf[32];
5432         va_list args;
5433
5434         if (!debug_level_enabled(id, level))
5435                 return;
5436         va_start(args, fmt);
5437         vsnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
5438         va_end(args);
5439         debug_text_event(id, level, dbf_txt_buf);
5440 }
5441 EXPORT_SYMBOL_GPL(qeth_dbf_longtext);
5442
5443 static int qeth_register_dbf_views(void)
5444 {
5445         int ret;
5446         int x;
5447
5448         for (x = 0; x < QETH_DBF_INFOS; x++) {
5449                 /* register the areas */
5450                 qeth_dbf[x].id = debug_register(qeth_dbf[x].name,
5451                                                 qeth_dbf[x].pages,
5452                                                 qeth_dbf[x].areas,
5453                                                 qeth_dbf[x].len);
5454                 if (qeth_dbf[x].id == NULL) {
5455                         qeth_unregister_dbf_views();
5456                         return -ENOMEM;
5457                 }
5458
5459                 /* register a view */
5460                 ret = debug_register_view(qeth_dbf[x].id, qeth_dbf[x].view);
5461                 if (ret) {
5462                         qeth_unregister_dbf_views();
5463                         return ret;
5464                 }
5465
5466                 /* set a passing level */
5467                 debug_set_level(qeth_dbf[x].id, qeth_dbf[x].level);
5468         }
5469
5470         return 0;
5471 }
5472
5473 static DEFINE_MUTEX(qeth_mod_mutex);    /* for synchronized module loading */
5474
5475 int qeth_core_load_discipline(struct qeth_card *card,
5476                 enum qeth_discipline_id discipline)
5477 {
5478         mutex_lock(&qeth_mod_mutex);
5479         switch (discipline) {
5480         case QETH_DISCIPLINE_LAYER3:
5481                 card->discipline = try_then_request_module(
5482                         symbol_get(qeth_l3_discipline), "qeth_l3");
5483                 break;
5484         case QETH_DISCIPLINE_LAYER2:
5485                 card->discipline = try_then_request_module(
5486                         symbol_get(qeth_l2_discipline), "qeth_l2");
5487                 break;
5488         default:
5489                 break;
5490         }
5491         mutex_unlock(&qeth_mod_mutex);
5492
5493         if (!card->discipline) {
5494                 dev_err(&card->gdev->dev, "There is no kernel module to "
5495                         "support discipline %d\n", discipline);
5496                 return -EINVAL;
5497         }
5498
5499         card->options.layer = discipline;
5500         return 0;
5501 }
5502
5503 void qeth_core_free_discipline(struct qeth_card *card)
5504 {
5505         if (IS_LAYER2(card))
5506                 symbol_put(qeth_l2_discipline);
5507         else
5508                 symbol_put(qeth_l3_discipline);
5509         card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
5510         card->discipline = NULL;
5511 }
5512
5513 const struct device_type qeth_generic_devtype = {
5514         .name = "qeth_generic",
5515         .groups = qeth_generic_attr_groups,
5516 };
5517 EXPORT_SYMBOL_GPL(qeth_generic_devtype);
5518
5519 static const struct device_type qeth_osn_devtype = {
5520         .name = "qeth_osn",
5521         .groups = qeth_osn_attr_groups,
5522 };
5523
5524 #define DBF_NAME_LEN    20
5525
5526 struct qeth_dbf_entry {
5527         char dbf_name[DBF_NAME_LEN];
5528         debug_info_t *dbf_info;
5529         struct list_head dbf_list;
5530 };
5531
5532 static LIST_HEAD(qeth_dbf_list);
5533 static DEFINE_MUTEX(qeth_dbf_list_mutex);
5534
5535 static debug_info_t *qeth_get_dbf_entry(char *name)
5536 {
5537         struct qeth_dbf_entry *entry;
5538         debug_info_t *rc = NULL;
5539
5540         mutex_lock(&qeth_dbf_list_mutex);
5541         list_for_each_entry(entry, &qeth_dbf_list, dbf_list) {
5542                 if (strcmp(entry->dbf_name, name) == 0) {
5543                         rc = entry->dbf_info;
5544                         break;
5545                 }
5546         }
5547         mutex_unlock(&qeth_dbf_list_mutex);
5548         return rc;
5549 }
5550
5551 static int qeth_add_dbf_entry(struct qeth_card *card, char *name)
5552 {
5553         struct qeth_dbf_entry *new_entry;
5554
5555         card->debug = debug_register(name, 2, 1, 8);
5556         if (!card->debug) {
5557                 QETH_DBF_TEXT_(SETUP, 2, "%s", "qcdbf");
5558                 goto err;
5559         }
5560         if (debug_register_view(card->debug, &debug_hex_ascii_view))
5561                 goto err_dbg;
5562         new_entry = kzalloc(sizeof(struct qeth_dbf_entry), GFP_KERNEL);
5563         if (!new_entry)
5564                 goto err_dbg;
5565         strncpy(new_entry->dbf_name, name, DBF_NAME_LEN);
5566         new_entry->dbf_info = card->debug;
5567         mutex_lock(&qeth_dbf_list_mutex);
5568         list_add(&new_entry->dbf_list, &qeth_dbf_list);
5569         mutex_unlock(&qeth_dbf_list_mutex);
5570
5571         return 0;
5572
5573 err_dbg:
5574         debug_unregister(card->debug);
5575 err:
5576         return -ENOMEM;
5577 }
5578
5579 static void qeth_clear_dbf_list(void)
5580 {
5581         struct qeth_dbf_entry *entry, *tmp;
5582
5583         mutex_lock(&qeth_dbf_list_mutex);
5584         list_for_each_entry_safe(entry, tmp, &qeth_dbf_list, dbf_list) {
5585                 list_del(&entry->dbf_list);
5586                 debug_unregister(entry->dbf_info);
5587                 kfree(entry);
5588         }
5589         mutex_unlock(&qeth_dbf_list_mutex);
5590 }
5591
5592 static struct net_device *qeth_alloc_netdev(struct qeth_card *card)
5593 {
5594         struct net_device *dev;
5595
5596         switch (card->info.type) {
5597         case QETH_CARD_TYPE_IQD:
5598                 dev = alloc_netdev_mqs(0, "hsi%d", NET_NAME_UNKNOWN,
5599                                        ether_setup, QETH_MAX_QUEUES, 1);
5600                 break;
5601         case QETH_CARD_TYPE_OSM:
5602                 dev = alloc_etherdev(0);
5603                 break;
5604         case QETH_CARD_TYPE_OSN:
5605                 dev = alloc_netdev(0, "osn%d", NET_NAME_UNKNOWN, ether_setup);
5606                 break;
5607         default:
5608                 dev = alloc_etherdev_mqs(0, QETH_MAX_QUEUES, 1);
5609         }
5610
5611         if (!dev)
5612                 return NULL;
5613
5614         dev->ml_priv = card;
5615         dev->watchdog_timeo = QETH_TX_TIMEOUT;
5616         dev->min_mtu = IS_OSN(card) ? 64 : 576;
5617          /* initialized when device first goes online: */
5618         dev->max_mtu = 0;
5619         dev->mtu = 0;
5620         SET_NETDEV_DEV(dev, &card->gdev->dev);
5621         netif_carrier_off(dev);
5622
5623         if (IS_OSN(card)) {
5624                 dev->ethtool_ops = &qeth_osn_ethtool_ops;
5625         } else {
5626                 dev->ethtool_ops = &qeth_ethtool_ops;
5627                 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
5628                 dev->hw_features |= NETIF_F_SG;
5629                 dev->vlan_features |= NETIF_F_SG;
5630                 if (IS_IQD(card)) {
5631                         dev->features |= NETIF_F_SG;
5632                         if (netif_set_real_num_tx_queues(dev,
5633                                                          QETH_IQD_MIN_TXQ)) {
5634                                 free_netdev(dev);
5635                                 return NULL;
5636                         }
5637                 }
5638         }
5639
5640         return dev;
5641 }
5642
5643 struct net_device *qeth_clone_netdev(struct net_device *orig)
5644 {
5645         struct net_device *clone = qeth_alloc_netdev(orig->ml_priv);
5646
5647         if (!clone)
5648                 return NULL;
5649
5650         clone->dev_port = orig->dev_port;
5651         return clone;
5652 }
5653
5654 static int qeth_core_probe_device(struct ccwgroup_device *gdev)
5655 {
5656         struct qeth_card *card;
5657         struct device *dev;
5658         int rc;
5659         enum qeth_discipline_id enforced_disc;
5660         char dbf_name[DBF_NAME_LEN];
5661
5662         QETH_DBF_TEXT(SETUP, 2, "probedev");
5663
5664         dev = &gdev->dev;
5665         if (!get_device(dev))
5666                 return -ENODEV;
5667
5668         QETH_DBF_TEXT_(SETUP, 2, "%s", dev_name(&gdev->dev));
5669
5670         card = qeth_alloc_card(gdev);
5671         if (!card) {
5672                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM);
5673                 rc = -ENOMEM;
5674                 goto err_dev;
5675         }
5676
5677         snprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
5678                 dev_name(&gdev->dev));
5679         card->debug = qeth_get_dbf_entry(dbf_name);
5680         if (!card->debug) {
5681                 rc = qeth_add_dbf_entry(card, dbf_name);
5682                 if (rc)
5683                         goto err_card;
5684         }
5685
5686         qeth_setup_card(card);
5687         card->dev = qeth_alloc_netdev(card);
5688         if (!card->dev) {
5689                 rc = -ENOMEM;
5690                 goto err_card;
5691         }
5692
5693         card->qdio.no_out_queues = card->dev->num_tx_queues;
5694         rc = qeth_update_from_chp_desc(card);
5695         if (rc)
5696                 goto err_chp_desc;
5697         qeth_determine_capabilities(card);
5698         qeth_set_blkt_defaults(card);
5699
5700         enforced_disc = qeth_enforce_discipline(card);
5701         switch (enforced_disc) {
5702         case QETH_DISCIPLINE_UNDETERMINED:
5703                 gdev->dev.type = &qeth_generic_devtype;
5704                 break;
5705         default:
5706                 card->info.layer_enforced = true;
5707                 rc = qeth_core_load_discipline(card, enforced_disc);
5708                 if (rc)
5709                         goto err_load;
5710
5711                 gdev->dev.type = IS_OSN(card) ? &qeth_osn_devtype :
5712                                                 card->discipline->devtype;
5713                 rc = card->discipline->setup(card->gdev);
5714                 if (rc)
5715                         goto err_disc;
5716                 break;
5717         }
5718
5719         return 0;
5720
5721 err_disc:
5722         qeth_core_free_discipline(card);
5723 err_load:
5724 err_chp_desc:
5725         free_netdev(card->dev);
5726 err_card:
5727         qeth_core_free_card(card);
5728 err_dev:
5729         put_device(dev);
5730         return rc;
5731 }
5732
5733 static void qeth_core_remove_device(struct ccwgroup_device *gdev)
5734 {
5735         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5736
5737         QETH_CARD_TEXT(card, 2, "removedv");
5738
5739         if (card->discipline) {
5740                 card->discipline->remove(gdev);
5741                 qeth_core_free_discipline(card);
5742         }
5743
5744         free_netdev(card->dev);
5745         qeth_core_free_card(card);
5746         put_device(&gdev->dev);
5747 }
5748
5749 static int qeth_core_set_online(struct ccwgroup_device *gdev)
5750 {
5751         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5752         int rc = 0;
5753         enum qeth_discipline_id def_discipline;
5754
5755         if (!card->discipline) {
5756                 def_discipline = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
5757                                                 QETH_DISCIPLINE_LAYER2;
5758                 rc = qeth_core_load_discipline(card, def_discipline);
5759                 if (rc)
5760                         goto err;
5761                 rc = card->discipline->setup(card->gdev);
5762                 if (rc) {
5763                         qeth_core_free_discipline(card);
5764                         goto err;
5765                 }
5766         }
5767         rc = card->discipline->set_online(gdev);
5768 err:
5769         return rc;
5770 }
5771
5772 static int qeth_core_set_offline(struct ccwgroup_device *gdev)
5773 {
5774         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5775         return card->discipline->set_offline(gdev);
5776 }
5777
5778 static void qeth_core_shutdown(struct ccwgroup_device *gdev)
5779 {
5780         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5781         qeth_set_allowed_threads(card, 0, 1);
5782         if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
5783                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
5784         qeth_qdio_clear_card(card, 0);
5785         qeth_drain_output_queues(card);
5786         qdio_free(CARD_DDEV(card));
5787 }
5788
5789 static int qeth_suspend(struct ccwgroup_device *gdev)
5790 {
5791         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5792
5793         qeth_set_allowed_threads(card, 0, 1);
5794         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
5795         if (gdev->state == CCWGROUP_OFFLINE)
5796                 return 0;
5797
5798         card->discipline->set_offline(gdev);
5799         return 0;
5800 }
5801
5802 static int qeth_resume(struct ccwgroup_device *gdev)
5803 {
5804         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5805         int rc;
5806
5807         rc = card->discipline->set_online(gdev);
5808
5809         qeth_set_allowed_threads(card, 0xffffffff, 0);
5810         if (rc)
5811                 dev_warn(&card->gdev->dev, "The qeth device driver failed to recover an error on the device\n");
5812         return rc;
5813 }
5814
5815 static ssize_t group_store(struct device_driver *ddrv, const char *buf,
5816                            size_t count)
5817 {
5818         int err;
5819
5820         err = ccwgroup_create_dev(qeth_core_root_dev, to_ccwgroupdrv(ddrv), 3,
5821                                   buf);
5822
5823         return err ? err : count;
5824 }
5825 static DRIVER_ATTR_WO(group);
5826
5827 static struct attribute *qeth_drv_attrs[] = {
5828         &driver_attr_group.attr,
5829         NULL,
5830 };
5831 static struct attribute_group qeth_drv_attr_group = {
5832         .attrs = qeth_drv_attrs,
5833 };
5834 static const struct attribute_group *qeth_drv_attr_groups[] = {
5835         &qeth_drv_attr_group,
5836         NULL,
5837 };
5838
5839 static struct ccwgroup_driver qeth_core_ccwgroup_driver = {
5840         .driver = {
5841                 .groups = qeth_drv_attr_groups,
5842                 .owner = THIS_MODULE,
5843                 .name = "qeth",
5844         },
5845         .ccw_driver = &qeth_ccw_driver,
5846         .setup = qeth_core_probe_device,
5847         .remove = qeth_core_remove_device,
5848         .set_online = qeth_core_set_online,
5849         .set_offline = qeth_core_set_offline,
5850         .shutdown = qeth_core_shutdown,
5851         .prepare = NULL,
5852         .complete = NULL,
5853         .freeze = qeth_suspend,
5854         .thaw = qeth_resume,
5855         .restore = qeth_resume,
5856 };
5857
5858 struct qeth_card *qeth_get_card_by_busid(char *bus_id)
5859 {
5860         struct ccwgroup_device *gdev;
5861         struct qeth_card *card;
5862
5863         gdev = get_ccwgroupdev_by_busid(&qeth_core_ccwgroup_driver, bus_id);
5864         if (!gdev)
5865                 return NULL;
5866
5867         card = dev_get_drvdata(&gdev->dev);
5868         put_device(&gdev->dev);
5869         return card;
5870 }
5871 EXPORT_SYMBOL_GPL(qeth_get_card_by_busid);
5872
5873 int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
5874 {
5875         struct qeth_card *card = dev->ml_priv;
5876         struct mii_ioctl_data *mii_data;
5877         int rc = 0;
5878
5879         if (!card)
5880                 return -ENODEV;
5881
5882         switch (cmd) {
5883         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
5884                 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
5885                 break;
5886         case SIOC_QETH_GET_CARD_TYPE:
5887                 if ((IS_OSD(card) || IS_OSM(card) || IS_OSX(card)) &&
5888                     !IS_VM_NIC(card))
5889                         return 1;
5890                 return 0;
5891         case SIOCGMIIPHY:
5892                 mii_data = if_mii(rq);
5893                 mii_data->phy_id = 0;
5894                 break;
5895         case SIOCGMIIREG:
5896                 mii_data = if_mii(rq);
5897                 if (mii_data->phy_id != 0)
5898                         rc = -EINVAL;
5899                 else
5900                         mii_data->val_out = qeth_mdio_read(dev,
5901                                 mii_data->phy_id, mii_data->reg_num);
5902                 break;
5903         case SIOC_QETH_QUERY_OAT:
5904                 rc = qeth_query_oat_command(card, rq->ifr_ifru.ifru_data);
5905                 break;
5906         default:
5907                 if (card->discipline->do_ioctl)
5908                         rc = card->discipline->do_ioctl(dev, rq, cmd);
5909                 else
5910                         rc = -EOPNOTSUPP;
5911         }
5912         if (rc)
5913                 QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
5914         return rc;
5915 }
5916 EXPORT_SYMBOL_GPL(qeth_do_ioctl);
5917
5918 static int qeth_start_csum_cb(struct qeth_card *card, struct qeth_reply *reply,
5919                               unsigned long data)
5920 {
5921         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5922         u32 *features = reply->param;
5923
5924         if (qeth_setassparms_inspect_rc(cmd))
5925                 return -EIO;
5926
5927         *features = cmd->data.setassparms.data.flags_32bit;
5928         return 0;
5929 }
5930
5931 static int qeth_set_csum_off(struct qeth_card *card, enum qeth_ipa_funcs cstype,
5932                              enum qeth_prot_versions prot)
5933 {
5934         return qeth_send_simple_setassparms_prot(card, cstype, IPA_CMD_ASS_STOP,
5935                                                  NULL, prot);
5936 }
5937
5938 static int qeth_set_csum_on(struct qeth_card *card, enum qeth_ipa_funcs cstype,
5939                             enum qeth_prot_versions prot)
5940 {
5941         u32 required_features = QETH_IPA_CHECKSUM_UDP | QETH_IPA_CHECKSUM_TCP;
5942         struct qeth_cmd_buffer *iob;
5943         struct qeth_ipa_caps caps;
5944         u32 features;
5945         int rc;
5946
5947         /* some L3 HW requires combined L3+L4 csum offload: */
5948         if (IS_LAYER3(card) && prot == QETH_PROT_IPV4 &&
5949             cstype == IPA_OUTBOUND_CHECKSUM)
5950                 required_features |= QETH_IPA_CHECKSUM_IP_HDR;
5951
5952         iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_START, 0,
5953                                        prot);
5954         if (!iob)
5955                 return -ENOMEM;
5956
5957         rc = qeth_send_ipa_cmd(card, iob, qeth_start_csum_cb, &features);
5958         if (rc)
5959                 return rc;
5960
5961         if ((required_features & features) != required_features) {
5962                 qeth_set_csum_off(card, cstype, prot);
5963                 return -EOPNOTSUPP;
5964         }
5965
5966         iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_ENABLE,
5967                                        SETASS_DATA_SIZEOF(flags_32bit),
5968                                        prot);
5969         if (!iob) {
5970                 qeth_set_csum_off(card, cstype, prot);
5971                 return -ENOMEM;
5972         }
5973
5974         if (features & QETH_IPA_CHECKSUM_LP2LP)
5975                 required_features |= QETH_IPA_CHECKSUM_LP2LP;
5976         __ipa_cmd(iob)->data.setassparms.data.flags_32bit = required_features;
5977         rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
5978         if (rc) {
5979                 qeth_set_csum_off(card, cstype, prot);
5980                 return rc;
5981         }
5982
5983         if (!qeth_ipa_caps_supported(&caps, required_features) ||
5984             !qeth_ipa_caps_enabled(&caps, required_features)) {
5985                 qeth_set_csum_off(card, cstype, prot);
5986                 return -EOPNOTSUPP;
5987         }
5988
5989         dev_info(&card->gdev->dev, "HW Checksumming (%sbound IPv%d) enabled\n",
5990                  cstype == IPA_INBOUND_CHECKSUM ? "in" : "out", prot);
5991         if (!qeth_ipa_caps_enabled(&caps, QETH_IPA_CHECKSUM_LP2LP) &&
5992             cstype == IPA_OUTBOUND_CHECKSUM)
5993                 dev_warn(&card->gdev->dev,
5994                          "Hardware checksumming is performed only if %s and its peer use different OSA Express 3 ports\n",
5995                          QETH_CARD_IFNAME(card));
5996         return 0;
5997 }
5998
5999 static int qeth_set_ipa_csum(struct qeth_card *card, bool on, int cstype,
6000                              enum qeth_prot_versions prot)
6001 {
6002         return on ? qeth_set_csum_on(card, cstype, prot) :
6003                     qeth_set_csum_off(card, cstype, prot);
6004 }
6005
6006 static int qeth_start_tso_cb(struct qeth_card *card, struct qeth_reply *reply,
6007                              unsigned long data)
6008 {
6009         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6010         struct qeth_tso_start_data *tso_data = reply->param;
6011
6012         if (qeth_setassparms_inspect_rc(cmd))
6013                 return -EIO;
6014
6015         tso_data->mss = cmd->data.setassparms.data.tso.mss;
6016         tso_data->supported = cmd->data.setassparms.data.tso.supported;
6017         return 0;
6018 }
6019
6020 static int qeth_set_tso_off(struct qeth_card *card,
6021                             enum qeth_prot_versions prot)
6022 {
6023         return qeth_send_simple_setassparms_prot(card, IPA_OUTBOUND_TSO,
6024                                                  IPA_CMD_ASS_STOP, NULL, prot);
6025 }
6026
6027 static int qeth_set_tso_on(struct qeth_card *card,
6028                            enum qeth_prot_versions prot)
6029 {
6030         struct qeth_tso_start_data tso_data;
6031         struct qeth_cmd_buffer *iob;
6032         struct qeth_ipa_caps caps;
6033         int rc;
6034
6035         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6036                                        IPA_CMD_ASS_START, 0, prot);
6037         if (!iob)
6038                 return -ENOMEM;
6039
6040         rc = qeth_send_ipa_cmd(card, iob, qeth_start_tso_cb, &tso_data);
6041         if (rc)
6042                 return rc;
6043
6044         if (!tso_data.mss || !(tso_data.supported & QETH_IPA_LARGE_SEND_TCP)) {
6045                 qeth_set_tso_off(card, prot);
6046                 return -EOPNOTSUPP;
6047         }
6048
6049         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6050                                        IPA_CMD_ASS_ENABLE,
6051                                        SETASS_DATA_SIZEOF(caps), prot);
6052         if (!iob) {
6053                 qeth_set_tso_off(card, prot);
6054                 return -ENOMEM;
6055         }
6056
6057         /* enable TSO capability */
6058         __ipa_cmd(iob)->data.setassparms.data.caps.enabled =
6059                 QETH_IPA_LARGE_SEND_TCP;
6060         rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6061         if (rc) {
6062                 qeth_set_tso_off(card, prot);
6063                 return rc;
6064         }
6065
6066         if (!qeth_ipa_caps_supported(&caps, QETH_IPA_LARGE_SEND_TCP) ||
6067             !qeth_ipa_caps_enabled(&caps, QETH_IPA_LARGE_SEND_TCP)) {
6068                 qeth_set_tso_off(card, prot);
6069                 return -EOPNOTSUPP;
6070         }
6071
6072         dev_info(&card->gdev->dev, "TSOv%u enabled (MSS: %u)\n", prot,
6073                  tso_data.mss);
6074         return 0;
6075 }
6076
6077 static int qeth_set_ipa_tso(struct qeth_card *card, bool on,
6078                             enum qeth_prot_versions prot)
6079 {
6080         return on ? qeth_set_tso_on(card, prot) : qeth_set_tso_off(card, prot);
6081 }
6082
6083 static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on)
6084 {
6085         int rc_ipv4 = (on) ? -EOPNOTSUPP : 0;
6086         int rc_ipv6;
6087
6088         if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
6089                 rc_ipv4 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6090                                             QETH_PROT_IPV4);
6091         if (!qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6092                 /* no/one Offload Assist available, so the rc is trivial */
6093                 return rc_ipv4;
6094
6095         rc_ipv6 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6096                                     QETH_PROT_IPV6);
6097
6098         if (on)
6099                 /* enable: success if any Assist is active */
6100                 return (rc_ipv6) ? rc_ipv4 : 0;
6101
6102         /* disable: failure if any Assist is still active */
6103         return (rc_ipv6) ? rc_ipv6 : rc_ipv4;
6104 }
6105
6106 /**
6107  * qeth_enable_hw_features() - (Re-)Enable HW functions for device features
6108  * @dev:        a net_device
6109  */
6110 void qeth_enable_hw_features(struct net_device *dev)
6111 {
6112         struct qeth_card *card = dev->ml_priv;
6113         netdev_features_t features;
6114
6115         features = dev->features;
6116         /* force-off any feature that might need an IPA sequence.
6117          * netdev_update_features() will restart them.
6118          */
6119         dev->features &= ~dev->hw_features;
6120         /* toggle VLAN filter, so that VIDs are re-programmed: */
6121         if (IS_LAYER2(card) && IS_VM_NIC(card)) {
6122                 dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
6123                 dev->wanted_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
6124         }
6125         netdev_update_features(dev);
6126         if (features != dev->features)
6127                 dev_warn(&card->gdev->dev,
6128                          "Device recovery failed to restore all offload features\n");
6129 }
6130 EXPORT_SYMBOL_GPL(qeth_enable_hw_features);
6131
6132 int qeth_set_features(struct net_device *dev, netdev_features_t features)
6133 {
6134         struct qeth_card *card = dev->ml_priv;
6135         netdev_features_t changed = dev->features ^ features;
6136         int rc = 0;
6137
6138         QETH_CARD_TEXT(card, 2, "setfeat");
6139         QETH_CARD_HEX(card, 2, &features, sizeof(features));
6140
6141         if ((changed & NETIF_F_IP_CSUM)) {
6142                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IP_CSUM,
6143                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV4);
6144                 if (rc)
6145                         changed ^= NETIF_F_IP_CSUM;
6146         }
6147         if (changed & NETIF_F_IPV6_CSUM) {
6148                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IPV6_CSUM,
6149                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV6);
6150                 if (rc)
6151                         changed ^= NETIF_F_IPV6_CSUM;
6152         }
6153         if (changed & NETIF_F_RXCSUM) {
6154                 rc = qeth_set_ipa_rx_csum(card, features & NETIF_F_RXCSUM);
6155                 if (rc)
6156                         changed ^= NETIF_F_RXCSUM;
6157         }
6158         if (changed & NETIF_F_TSO) {
6159                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO,
6160                                       QETH_PROT_IPV4);
6161                 if (rc)
6162                         changed ^= NETIF_F_TSO;
6163         }
6164         if (changed & NETIF_F_TSO6) {
6165                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO6,
6166                                       QETH_PROT_IPV6);
6167                 if (rc)
6168                         changed ^= NETIF_F_TSO6;
6169         }
6170
6171         /* everything changed successfully? */
6172         if ((dev->features ^ features) == changed)
6173                 return 0;
6174         /* something went wrong. save changed features and return error */
6175         dev->features ^= changed;
6176         return -EIO;
6177 }
6178 EXPORT_SYMBOL_GPL(qeth_set_features);
6179
6180 netdev_features_t qeth_fix_features(struct net_device *dev,
6181                                     netdev_features_t features)
6182 {
6183         struct qeth_card *card = dev->ml_priv;
6184
6185         QETH_CARD_TEXT(card, 2, "fixfeat");
6186         if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM))
6187                 features &= ~NETIF_F_IP_CSUM;
6188         if (!qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6))
6189                 features &= ~NETIF_F_IPV6_CSUM;
6190         if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM) &&
6191             !qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6192                 features &= ~NETIF_F_RXCSUM;
6193         if (!qeth_is_supported(card, IPA_OUTBOUND_TSO))
6194                 features &= ~NETIF_F_TSO;
6195         if (!qeth_is_supported6(card, IPA_OUTBOUND_TSO))
6196                 features &= ~NETIF_F_TSO6;
6197
6198         QETH_CARD_HEX(card, 2, &features, sizeof(features));
6199         return features;
6200 }
6201 EXPORT_SYMBOL_GPL(qeth_fix_features);
6202
6203 netdev_features_t qeth_features_check(struct sk_buff *skb,
6204                                       struct net_device *dev,
6205                                       netdev_features_t features)
6206 {
6207         /* GSO segmentation builds skbs with
6208          *      a (small) linear part for the headers, and
6209          *      page frags for the data.
6210          * Compared to a linear skb, the header-only part consumes an
6211          * additional buffer element. This reduces buffer utilization, and
6212          * hurts throughput. So compress small segments into one element.
6213          */
6214         if (netif_needs_gso(skb, features)) {
6215                 /* match skb_segment(): */
6216                 unsigned int doffset = skb->data - skb_mac_header(skb);
6217                 unsigned int hsize = skb_shinfo(skb)->gso_size;
6218                 unsigned int hroom = skb_headroom(skb);
6219
6220                 /* linearize only if resulting skb allocations are order-0: */
6221                 if (SKB_DATA_ALIGN(hroom + doffset + hsize) <= SKB_MAX_HEAD(0))
6222                         features &= ~NETIF_F_SG;
6223         }
6224
6225         return vlan_features_check(skb, features);
6226 }
6227 EXPORT_SYMBOL_GPL(qeth_features_check);
6228
6229 void qeth_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
6230 {
6231         struct qeth_card *card = dev->ml_priv;
6232         struct qeth_qdio_out_q *queue;
6233         unsigned int i;
6234
6235         QETH_CARD_TEXT(card, 5, "getstat");
6236
6237         stats->rx_packets = card->stats.rx_packets;
6238         stats->rx_bytes = card->stats.rx_bytes;
6239         stats->rx_errors = card->stats.rx_errors;
6240         stats->rx_dropped = card->stats.rx_dropped;
6241         stats->multicast = card->stats.rx_multicast;
6242
6243         for (i = 0; i < card->qdio.no_out_queues; i++) {
6244                 queue = card->qdio.out_qs[i];
6245
6246                 stats->tx_packets += queue->stats.tx_packets;
6247                 stats->tx_bytes += queue->stats.tx_bytes;
6248                 stats->tx_errors += queue->stats.tx_errors;
6249                 stats->tx_dropped += queue->stats.tx_dropped;
6250         }
6251 }
6252 EXPORT_SYMBOL_GPL(qeth_get_stats64);
6253
6254 u16 qeth_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
6255                           u8 cast_type, struct net_device *sb_dev)
6256 {
6257         if (cast_type != RTN_UNICAST)
6258                 return QETH_IQD_MCAST_TXQ;
6259         return QETH_IQD_MIN_UCAST_TXQ;
6260 }
6261 EXPORT_SYMBOL_GPL(qeth_iqd_select_queue);
6262
6263 int qeth_open(struct net_device *dev)
6264 {
6265         struct qeth_card *card = dev->ml_priv;
6266
6267         QETH_CARD_TEXT(card, 4, "qethopen");
6268
6269         if (qdio_stop_irq(CARD_DDEV(card), 0) < 0)
6270                 return -EIO;
6271
6272         card->data.state = CH_STATE_UP;
6273         netif_tx_start_all_queues(dev);
6274
6275         napi_enable(&card->napi);
6276         local_bh_disable();
6277         napi_schedule(&card->napi);
6278         if (IS_IQD(card)) {
6279                 struct qeth_qdio_out_q *queue;
6280                 unsigned int i;
6281
6282                 qeth_for_each_output_queue(card, queue, i) {
6283                         netif_tx_napi_add(dev, &queue->napi, qeth_tx_poll,
6284                                           QETH_NAPI_WEIGHT);
6285                         napi_enable(&queue->napi);
6286                         napi_schedule(&queue->napi);
6287                 }
6288         }
6289         /* kick-start the NAPI softirq: */
6290         local_bh_enable();
6291         return 0;
6292 }
6293 EXPORT_SYMBOL_GPL(qeth_open);
6294
6295 int qeth_stop(struct net_device *dev)
6296 {
6297         struct qeth_card *card = dev->ml_priv;
6298
6299         QETH_CARD_TEXT(card, 4, "qethstop");
6300         if (IS_IQD(card)) {
6301                 struct qeth_qdio_out_q *queue;
6302                 unsigned int i;
6303
6304                 /* Quiesce the NAPI instances: */
6305                 qeth_for_each_output_queue(card, queue, i) {
6306                         napi_disable(&queue->napi);
6307                         del_timer_sync(&queue->timer);
6308                 }
6309
6310                 /* Stop .ndo_start_xmit, might still access queue->napi. */
6311                 netif_tx_disable(dev);
6312
6313                 /* Queues may get re-allocated, so remove the NAPIs here. */
6314                 qeth_for_each_output_queue(card, queue, i)
6315                         netif_napi_del(&queue->napi);
6316         } else {
6317                 netif_tx_disable(dev);
6318         }
6319
6320         napi_disable(&card->napi);
6321         return 0;
6322 }
6323 EXPORT_SYMBOL_GPL(qeth_stop);
6324
6325 static int __init qeth_core_init(void)
6326 {
6327         int rc;
6328
6329         pr_info("loading core functions\n");
6330
6331         rc = qeth_register_dbf_views();
6332         if (rc)
6333                 goto dbf_err;
6334         qeth_core_root_dev = root_device_register("qeth");
6335         rc = PTR_ERR_OR_ZERO(qeth_core_root_dev);
6336         if (rc)
6337                 goto register_err;
6338         qeth_core_header_cache =
6339                 kmem_cache_create("qeth_hdr", QETH_HDR_CACHE_OBJ_SIZE,
6340                                   roundup_pow_of_two(QETH_HDR_CACHE_OBJ_SIZE),
6341                                   0, NULL);
6342         if (!qeth_core_header_cache) {
6343                 rc = -ENOMEM;
6344                 goto slab_err;
6345         }
6346         qeth_qdio_outbuf_cache = kmem_cache_create("qeth_buf",
6347                         sizeof(struct qeth_qdio_out_buffer), 0, 0, NULL);
6348         if (!qeth_qdio_outbuf_cache) {
6349                 rc = -ENOMEM;
6350                 goto cqslab_err;
6351         }
6352         rc = ccw_driver_register(&qeth_ccw_driver);
6353         if (rc)
6354                 goto ccw_err;
6355         rc = ccwgroup_driver_register(&qeth_core_ccwgroup_driver);
6356         if (rc)
6357                 goto ccwgroup_err;
6358
6359         return 0;
6360
6361 ccwgroup_err:
6362         ccw_driver_unregister(&qeth_ccw_driver);
6363 ccw_err:
6364         kmem_cache_destroy(qeth_qdio_outbuf_cache);
6365 cqslab_err:
6366         kmem_cache_destroy(qeth_core_header_cache);
6367 slab_err:
6368         root_device_unregister(qeth_core_root_dev);
6369 register_err:
6370         qeth_unregister_dbf_views();
6371 dbf_err:
6372         pr_err("Initializing the qeth device driver failed\n");
6373         return rc;
6374 }
6375
6376 static void __exit qeth_core_exit(void)
6377 {
6378         qeth_clear_dbf_list();
6379         ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver);
6380         ccw_driver_unregister(&qeth_ccw_driver);
6381         kmem_cache_destroy(qeth_qdio_outbuf_cache);
6382         kmem_cache_destroy(qeth_core_header_cache);
6383         root_device_unregister(qeth_core_root_dev);
6384         qeth_unregister_dbf_views();
6385         pr_info("core functions removed\n");
6386 }
6387
6388 module_init(qeth_core_init);
6389 module_exit(qeth_core_exit);
6390 MODULE_AUTHOR("Frank Blaschka <[email protected]>");
6391 MODULE_DESCRIPTION("qeth core functions");
6392 MODULE_LICENSE("GPL");