drivers/s390/net/qeth_core_main.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *    Copyright IBM Corp. 2007, 2009
   4  *    Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
   5  *               Frank Pavlic <fpavlic@de.ibm.com>,
   6  *               Thomas Spatzier <tspat@de.ibm.com>,
   7  *               Frank Blaschka <frank.blaschka@de.ibm.com>
   8  */
   9
  10 #define KMSG_COMPONENT "qeth"
  11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  12
  13 #include <linux/compat.h>
  14 #include <linux/module.h>
  15 #include <linux/moduleparam.h>
  16 #include <linux/string.h>
  17 #include <linux/errno.h>
  18 #include <linux/kernel.h>
  19 #include <linux/log2.h>
  20 #include <linux/ip.h>
  21 #include <linux/tcp.h>
  22 #include <linux/mii.h>
  23 #include <linux/mm.h>
  24 #include <linux/kthread.h>
  25 #include <linux/slab.h>
  26 #include <linux/if_vlan.h>
  27 #include <linux/netdevice.h>
  28 #include <linux/netdev_features.h>
  29 #include <linux/skbuff.h>
  30 #include <linux/vmalloc.h>
  31
  32 #include <net/iucv/af_iucv.h>
  33 #include <net/dsfield.h>
  34
  35 #include <asm/ebcdic.h>
  36 #include <asm/chpid.h>
  37 #include <asm/io.h>
  38 #include <asm/sysinfo.h>
  39 #include <asm/diag.h>
  40 #include <asm/cio.h>
  41 #include <asm/ccwdev.h>
  42 #include <asm/cpcmd.h>
  43
  44 #include "qeth_core.h"
  45
  46 struct qeth_dbf_info qeth_dbf[QETH_DBF_INFOS] = {
  47         /* define dbf - Name, Pages, Areas, Maxlen, Level, View, Handle */
  48         /*                   N  P  A    M  L  V                      H  */
  49         [QETH_DBF_SETUP] = {"qeth_setup",
  50                                 8, 1,   8, 5, &debug_hex_ascii_view, NULL},
  51         [QETH_DBF_MSG]   = {"qeth_msg", 8, 1, 11 * sizeof(long), 3,
  52                             &debug_sprintf_view, NULL},
  53         [QETH_DBF_CTRL]  = {"qeth_control",
  54                 8, 1, QETH_DBF_CTRL_LEN, 5, &debug_hex_ascii_view, NULL},
  55 };
  56 EXPORT_SYMBOL_GPL(qeth_dbf);
  57
  58 struct kmem_cache *qeth_core_header_cache;
  59 EXPORT_SYMBOL_GPL(qeth_core_header_cache);
  60 static struct kmem_cache *qeth_qdio_outbuf_cache;
  61
  62 static struct device *qeth_core_root_dev;
  63 static struct lock_class_key qdio_out_skb_queue_key;
  64
  65 static void qeth_issue_next_read_cb(struct qeth_card *card,
  66                                     struct qeth_cmd_buffer *iob,
  67                                     unsigned int data_length);
  68 static void qeth_free_buffer_pool(struct qeth_card *);
  69 static int qeth_qdio_establish(struct qeth_card *);
  70 static void qeth_free_qdio_queues(struct qeth_card *card);
  71 static void qeth_notify_skbs(struct qeth_qdio_out_q *queue,
  72                 struct qeth_qdio_out_buffer *buf,
  73                 enum iucv_tx_notify notification);
  74 static void qeth_tx_complete_buf(struct qeth_qdio_out_buffer *buf, bool error,
  75                                  int budget);
  76 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *, int);
  77
  78 static void qeth_close_dev_handler(struct work_struct *work)
  79 {
  80         struct qeth_card *card;
  81
  82         card = container_of(work, struct qeth_card, close_dev_work);
  83         QETH_CARD_TEXT(card, 2, "cldevhdl");
  84         ccwgroup_set_offline(card->gdev);
  85 }
  86
  87 static const char *qeth_get_cardname(struct qeth_card *card)
  88 {
  89         if (IS_VM_NIC(card)) {
  90                 switch (card->info.type) {
  91                 case QETH_CARD_TYPE_OSD:
  92                         return " Virtual NIC QDIO";
  93                 case QETH_CARD_TYPE_IQD:
  94                         return " Virtual NIC Hiper";
  95                 case QETH_CARD_TYPE_OSM:
  96                         return " Virtual NIC QDIO - OSM";
  97                 case QETH_CARD_TYPE_OSX:
  98                         return " Virtual NIC QDIO - OSX";
  99                 default:
 100                         return " unknown";
 101                 }
 102         } else {
 103                 switch (card->info.type) {
 104                 case QETH_CARD_TYPE_OSD:
 105                         return " OSD Express";
 106                 case QETH_CARD_TYPE_IQD:
 107                         return " HiperSockets";
 108                 case QETH_CARD_TYPE_OSN:
 109                         return " OSN QDIO";
 110                 case QETH_CARD_TYPE_OSM:
 111                         return " OSM QDIO";
 112                 case QETH_CARD_TYPE_OSX:
 113                         return " OSX QDIO";
 114                 default:
 115                         return " unknown";
 116                 }
 117         }
 118         return " n/a";
 119 }
 120
 121 /* max length to be returned: 14 */
 122 const char *qeth_get_cardname_short(struct qeth_card *card)
 123 {
 124         if (IS_VM_NIC(card)) {
 125                 switch (card->info.type) {
 126                 case QETH_CARD_TYPE_OSD:
 127                         return "Virt.NIC QDIO";
 128                 case QETH_CARD_TYPE_IQD:
 129                         return "Virt.NIC Hiper";
 130                 case QETH_CARD_TYPE_OSM:
 131                         return "Virt.NIC OSM";
 132                 case QETH_CARD_TYPE_OSX:
 133                         return "Virt.NIC OSX";
 134                 default:
 135                         return "unknown";
 136                 }
 137         } else {
 138                 switch (card->info.type) {
 139                 case QETH_CARD_TYPE_OSD:
 140                         switch (card->info.link_type) {
 141                         case QETH_LINK_TYPE_FAST_ETH:
 142                                 return "OSD_100";
 143                         case QETH_LINK_TYPE_HSTR:
 144                                 return "HSTR";
 145                         case QETH_LINK_TYPE_GBIT_ETH:
 146                                 return "OSD_1000";
 147                         case QETH_LINK_TYPE_10GBIT_ETH:
 148                                 return "OSD_10GIG";
 149                         case QETH_LINK_TYPE_25GBIT_ETH:
 150                                 return "OSD_25GIG";
 151                         case QETH_LINK_TYPE_LANE_ETH100:
 152                                 return "OSD_FE_LANE";
 153                         case QETH_LINK_TYPE_LANE_TR:
 154                                 return "OSD_TR_LANE";
 155                         case QETH_LINK_TYPE_LANE_ETH1000:
 156                                 return "OSD_GbE_LANE";
 157                         case QETH_LINK_TYPE_LANE:
 158                                 return "OSD_ATM_LANE";
 159                         default:
 160                                 return "OSD_Express";
 161                         }
 162                 case QETH_CARD_TYPE_IQD:
 163                         return "HiperSockets";
 164                 case QETH_CARD_TYPE_OSN:
 165                         return "OSN";
 166                 case QETH_CARD_TYPE_OSM:
 167                         return "OSM_1000";
 168                 case QETH_CARD_TYPE_OSX:
 169                         return "OSX_10GIG";
 170                 default:
 171                         return "unknown";
 172                 }
 173         }
 174         return "n/a";
 175 }
 176
 177 void qeth_set_allowed_threads(struct qeth_card *card, unsigned long threads,
 178                          int clear_start_mask)
 179 {
 180         unsigned long flags;
 181
 182         spin_lock_irqsave(&card->thread_mask_lock, flags);
 183         card->thread_allowed_mask = threads;
 184         if (clear_start_mask)
 185                 card->thread_start_mask &= threads;
 186         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 187         wake_up(&card->wait_q);
 188 }
 189 EXPORT_SYMBOL_GPL(qeth_set_allowed_threads);
 190
 191 int qeth_threads_running(struct qeth_card *card, unsigned long threads)
 192 {
 193         unsigned long flags;
 194         int rc = 0;
 195
 196         spin_lock_irqsave(&card->thread_mask_lock, flags);
 197         rc = (card->thread_running_mask & threads);
 198         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 199         return rc;
 200 }
 201 EXPORT_SYMBOL_GPL(qeth_threads_running);
 202
 203 void qeth_clear_working_pool_list(struct qeth_card *card)
 204 {
 205         struct qeth_buffer_pool_entry *pool_entry, *tmp;
 206
 207         QETH_CARD_TEXT(card, 5, "clwrklst");
 208         list_for_each_entry_safe(pool_entry, tmp,
 209                             &card->qdio.in_buf_pool.entry_list, list){
 210                         list_del(&pool_entry->list);
 211         }
 212 }
 213 EXPORT_SYMBOL_GPL(qeth_clear_working_pool_list);
 214
 215 static int qeth_alloc_buffer_pool(struct qeth_card *card)
 216 {
 217         struct qeth_buffer_pool_entry *pool_entry;
 218         void *ptr;
 219         int i, j;
 220
 221         QETH_CARD_TEXT(card, 5, "alocpool");
 222         for (i = 0; i < card->qdio.init_pool.buf_count; ++i) {
 223                 pool_entry = kzalloc(sizeof(*pool_entry), GFP_KERNEL);
 224                 if (!pool_entry) {
 225                         qeth_free_buffer_pool(card);
 226                         return -ENOMEM;
 227                 }
 228                 for (j = 0; j < QETH_MAX_BUFFER_ELEMENTS(card); ++j) {
 229                         ptr = (void *) __get_free_page(GFP_KERNEL);
 230                         if (!ptr) {
 231                                 while (j > 0)
 232                                         free_page((unsigned long)
 233                                                   pool_entry->elements[--j]);
 234                                 kfree(pool_entry);
 235                                 qeth_free_buffer_pool(card);
 236                                 return -ENOMEM;
 237                         }
 238                         pool_entry->elements[j] = ptr;
 239                 }
 240                 list_add(&pool_entry->init_list,
 241                          &card->qdio.init_pool.entry_list);
 242         }
 243         return 0;
 244 }
 245
 246 int qeth_realloc_buffer_pool(struct qeth_card *card, int bufcnt)
 247 {
 248         QETH_CARD_TEXT(card, 2, "realcbp");
 249
 250         if (card->state != CARD_STATE_DOWN)
 251                 return -EPERM;
 252
 253         /* TODO: steel/add buffers from/to a running card's buffer pool (?) */
 254         qeth_clear_working_pool_list(card);
 255         qeth_free_buffer_pool(card);
 256         card->qdio.in_buf_pool.buf_count = bufcnt;
 257         card->qdio.init_pool.buf_count = bufcnt;
 258         return qeth_alloc_buffer_pool(card);
 259 }
 260 EXPORT_SYMBOL_GPL(qeth_realloc_buffer_pool);
 261
 262 static void qeth_free_qdio_queue(struct qeth_qdio_q *q)
 263 {
 264         if (!q)
 265                 return;
 266
 267         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
 268         kfree(q);
 269 }
 270
 271 static struct qeth_qdio_q *qeth_alloc_qdio_queue(void)
 272 {
 273         struct qeth_qdio_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
 274         int i;
 275
 276         if (!q)
 277                 return NULL;
 278
 279         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
 280                 kfree(q);
 281                 return NULL;
 282         }
 283
 284         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i)
 285                 q->bufs[i].buffer = q->qdio_bufs[i];
 286
 287         QETH_DBF_HEX(SETUP, 2, &q, sizeof(void *));
 288         return q;
 289 }
 290
 291 static int qeth_cq_init(struct qeth_card *card)
 292 {
 293         int rc;
 294
 295         if (card->options.cq == QETH_CQ_ENABLED) {
 296                 QETH_CARD_TEXT(card, 2, "cqinit");
 297                 qdio_reset_buffers(card->qdio.c_q->qdio_bufs,
 298                                    QDIO_MAX_BUFFERS_PER_Q);
 299                 card->qdio.c_q->next_buf_to_init = 127;
 300                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT,
 301                              card->qdio.no_in_queues - 1, 0,
 302                              127);
 303                 if (rc) {
 304                         QETH_CARD_TEXT_(card, 2, "1err%d", rc);
 305                         goto out;
 306                 }
 307         }
 308         rc = 0;
 309 out:
 310         return rc;
 311 }
 312
 313 static int qeth_alloc_cq(struct qeth_card *card)
 314 {
 315         int rc;
 316
 317         if (card->options.cq == QETH_CQ_ENABLED) {
 318                 int i;
 319                 struct qdio_outbuf_state *outbuf_states;
 320
 321                 QETH_CARD_TEXT(card, 2, "cqon");
 322                 card->qdio.c_q = qeth_alloc_qdio_queue();
 323                 if (!card->qdio.c_q) {
 324                         rc = -1;
 325                         goto kmsg_out;
 326                 }
 327                 card->qdio.no_in_queues = 2;
 328                 card->qdio.out_bufstates =
 329                         kcalloc(card->qdio.no_out_queues *
 330                                         QDIO_MAX_BUFFERS_PER_Q,
 331                                 sizeof(struct qdio_outbuf_state),
 332                                 GFP_KERNEL);
 333                 outbuf_states = card->qdio.out_bufstates;
 334                 if (outbuf_states == NULL) {
 335                         rc = -1;
 336                         goto free_cq_out;
 337                 }
 338                 for (i = 0; i < card->qdio.no_out_queues; ++i) {
 339                         card->qdio.out_qs[i]->bufstates = outbuf_states;
 340                         outbuf_states += QDIO_MAX_BUFFERS_PER_Q;
 341                 }
 342         } else {
 343                 QETH_CARD_TEXT(card, 2, "nocq");
 344                 card->qdio.c_q = NULL;
 345                 card->qdio.no_in_queues = 1;
 346         }
 347         QETH_CARD_TEXT_(card, 2, "iqc%d", card->qdio.no_in_queues);
 348         rc = 0;
 349 out:
 350         return rc;
 351 free_cq_out:
 352         qeth_free_qdio_queue(card->qdio.c_q);
 353         card->qdio.c_q = NULL;
 354 kmsg_out:
 355         dev_err(&card->gdev->dev, "Failed to create completion queue\n");
 356         goto out;
 357 }
 358
 359 static void qeth_free_cq(struct qeth_card *card)
 360 {
 361         if (card->qdio.c_q) {
 362                 --card->qdio.no_in_queues;
 363                 qeth_free_qdio_queue(card->qdio.c_q);
 364                 card->qdio.c_q = NULL;
 365         }
 366         kfree(card->qdio.out_bufstates);
 367         card->qdio.out_bufstates = NULL;
 368 }
 369
 370 static enum iucv_tx_notify qeth_compute_cq_notification(int sbalf15,
 371                                                         int delayed)
 372 {
 373         enum iucv_tx_notify n;
 374
 375         switch (sbalf15) {
 376         case 0:
 377                 n = delayed ? TX_NOTIFY_DELAYED_OK : TX_NOTIFY_OK;
 378                 break;
 379         case 4:
 380         case 16:
 381         case 17:
 382         case 18:
 383                 n = delayed ? TX_NOTIFY_DELAYED_UNREACHABLE :
 384                         TX_NOTIFY_UNREACHABLE;
 385                 break;
 386         default:
 387                 n = delayed ? TX_NOTIFY_DELAYED_GENERALERROR :
 388                         TX_NOTIFY_GENERALERROR;
 389                 break;
 390         }
 391
 392         return n;
 393 }
 394
 395 static void qeth_cleanup_handled_pending(struct qeth_qdio_out_q *q, int bidx,
 396                                          int forced_cleanup)
 397 {
 398         if (q->card->options.cq != QETH_CQ_ENABLED)
 399                 return;
 400
 401         if (q->bufs[bidx]->next_pending != NULL) {
 402                 struct qeth_qdio_out_buffer *head = q->bufs[bidx];
 403                 struct qeth_qdio_out_buffer *c = q->bufs[bidx]->next_pending;
 404
 405                 while (c) {
 406                         if (forced_cleanup ||
 407                             atomic_read(&c->state) ==
 408                               QETH_QDIO_BUF_HANDLED_DELAYED) {
 409                                 struct qeth_qdio_out_buffer *f = c;
 410                                 QETH_CARD_TEXT(f->q->card, 5, "fp");
 411                                 QETH_CARD_TEXT_(f->q->card, 5, "%lx", (long) f);
 412                                 /* release here to avoid interleaving between
 413                                    outbound tasklet and inbound tasklet
 414                                    regarding notifications and lifecycle */
 415                                 qeth_tx_complete_buf(c, forced_cleanup, 0);
 416
 417                                 c = f->next_pending;
 418                                 WARN_ON_ONCE(head->next_pending != f);
 419                                 head->next_pending = c;
 420                                 kmem_cache_free(qeth_qdio_outbuf_cache, f);
 421                         } else {
 422                                 head = c;
 423                                 c = c->next_pending;
 424                         }
 425
 426                 }
 427         }
 428         if (forced_cleanup && (atomic_read(&(q->bufs[bidx]->state)) ==
 429                                         QETH_QDIO_BUF_HANDLED_DELAYED)) {
 430                 /* for recovery situations */
 431                 qeth_init_qdio_out_buf(q, bidx);
 432                 QETH_CARD_TEXT(q->card, 2, "clprecov");
 433         }
 434 }
 435
 436
 437 static void qeth_qdio_handle_aob(struct qeth_card *card,
 438                                  unsigned long phys_aob_addr)
 439 {
 440         struct qaob *aob;
 441         struct qeth_qdio_out_buffer *buffer;
 442         enum iucv_tx_notify notification;
 443         unsigned int i;
 444
 445         aob = (struct qaob *) phys_to_virt(phys_aob_addr);
 446         QETH_CARD_TEXT(card, 5, "haob");
 447         QETH_CARD_TEXT_(card, 5, "%lx", phys_aob_addr);
 448         buffer = (struct qeth_qdio_out_buffer *) aob->user1;
 449         QETH_CARD_TEXT_(card, 5, "%lx", aob->user1);
 450
 451         if (atomic_cmpxchg(&buffer->state, QETH_QDIO_BUF_PRIMED,
 452                            QETH_QDIO_BUF_IN_CQ) == QETH_QDIO_BUF_PRIMED) {
 453                 notification = TX_NOTIFY_OK;
 454         } else {
 455                 WARN_ON_ONCE(atomic_read(&buffer->state) !=
 456                                                         QETH_QDIO_BUF_PENDING);
 457                 atomic_set(&buffer->state, QETH_QDIO_BUF_IN_CQ);
 458                 notification = TX_NOTIFY_DELAYED_OK;
 459         }
 460
 461         if (aob->aorc != 0)  {
 462                 QETH_CARD_TEXT_(card, 2, "aorc%02X", aob->aorc);
 463                 notification = qeth_compute_cq_notification(aob->aorc, 1);
 464         }
 465         qeth_notify_skbs(buffer->q, buffer, notification);
 466
 467         /* Free dangling allocations. The attached skbs are handled by
 468          * qeth_cleanup_handled_pending().
 469          */
 470         for (i = 0;
 471              i < aob->sb_count && i < QETH_MAX_BUFFER_ELEMENTS(card);
 472              i++) {
 473                 if (aob->sba[i] && buffer->is_header[i])
 474                         kmem_cache_free(qeth_core_header_cache,
 475                                         (void *) aob->sba[i]);
 476         }
 477         atomic_set(&buffer->state, QETH_QDIO_BUF_HANDLED_DELAYED);
 478
 479         qdio_release_aob(aob);
 480 }
 481
 482 static inline int qeth_is_cq(struct qeth_card *card, unsigned int queue)
 483 {
 484         return card->options.cq == QETH_CQ_ENABLED &&
 485             card->qdio.c_q != NULL &&
 486             queue != 0 &&
 487             queue == card->qdio.no_in_queues - 1;
 488 }
 489
 490 static void qeth_setup_ccw(struct ccw1 *ccw, u8 cmd_code, u8 flags, u32 len,
 491                            void *data)
 492 {
 493         ccw->cmd_code = cmd_code;
 494         ccw->flags = flags | CCW_FLAG_SLI;
 495         ccw->count = len;
 496         ccw->cda = (__u32) __pa(data);
 497 }
 498
 499 static int __qeth_issue_next_read(struct qeth_card *card)
 500 {
 501         struct qeth_cmd_buffer *iob = card->read_cmd;
 502         struct qeth_channel *channel = iob->channel;
 503         struct ccw1 *ccw = __ccw_from_cmd(iob);
 504         int rc;
 505
 506         QETH_CARD_TEXT(card, 5, "issnxrd");
 507         if (channel->state != CH_STATE_UP)
 508                 return -EIO;
 509
 510         memset(iob->data, 0, iob->length);
 511         qeth_setup_ccw(ccw, CCW_CMD_READ, 0, iob->length, iob->data);
 512         iob->callback = qeth_issue_next_read_cb;
 513         /* keep the cmd alive after completion: */
 514         qeth_get_cmd(iob);
 515
 516         QETH_CARD_TEXT(card, 6, "noirqpnd");
 517         rc = ccw_device_start(channel->ccwdev, ccw, (addr_t) iob, 0, 0);
 518         if (rc) {
 519                 QETH_DBF_MESSAGE(2, "error %i on device %x when starting next read ccw!\n",
 520                                  rc, CARD_DEVID(card));
 521                 atomic_set(&channel->irq_pending, 0);
 522                 qeth_put_cmd(iob);
 523                 card->read_or_write_problem = 1;
 524                 qeth_schedule_recovery(card);
 525                 wake_up(&card->wait_q);
 526         }
 527         return rc;
 528 }
 529
 530 static int qeth_issue_next_read(struct qeth_card *card)
 531 {
 532         int ret;
 533
 534         spin_lock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 535         ret = __qeth_issue_next_read(card);
 536         spin_unlock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 537
 538         return ret;
 539 }
 540
 541 static void qeth_enqueue_cmd(struct qeth_card *card,
 542                              struct qeth_cmd_buffer *iob)
 543 {
 544         spin_lock_irq(&card->lock);
 545         list_add_tail(&iob->list, &card->cmd_waiter_list);
 546         spin_unlock_irq(&card->lock);
 547 }
 548
 549 static void qeth_dequeue_cmd(struct qeth_card *card,
 550                              struct qeth_cmd_buffer *iob)
 551 {
 552         spin_lock_irq(&card->lock);
 553         list_del(&iob->list);
 554         spin_unlock_irq(&card->lock);
 555 }
 556
 557 void qeth_notify_cmd(struct qeth_cmd_buffer *iob, int reason)
 558 {
 559         iob->rc = reason;
 560         complete(&iob->done);
 561 }
 562 EXPORT_SYMBOL_GPL(qeth_notify_cmd);
 563
 564 static void qeth_issue_ipa_msg(struct qeth_ipa_cmd *cmd, int rc,
 565                 struct qeth_card *card)
 566 {
 567         const char *ipa_name;
 568         int com = cmd->hdr.command;
 569         ipa_name = qeth_get_ipa_cmd_name(com);
 570
 571         if (rc)
 572                 QETH_DBF_MESSAGE(2, "IPA: %s(%#x) for device %x returned %#x \"%s\"\n",
 573                                  ipa_name, com, CARD_DEVID(card), rc,
 574                                  qeth_get_ipa_msg(rc));
 575         else
 576                 QETH_DBF_MESSAGE(5, "IPA: %s(%#x) for device %x succeeded\n",
 577                                  ipa_name, com, CARD_DEVID(card));
 578 }
 579
 580 static struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card,
 581                                                 struct qeth_ipa_cmd *cmd)
 582 {
 583         QETH_CARD_TEXT(card, 5, "chkipad");
 584
 585         if (IS_IPA_REPLY(cmd)) {
 586                 if (cmd->hdr.command != IPA_CMD_SETCCID &&
 587                     cmd->hdr.command != IPA_CMD_DELCCID &&
 588                     cmd->hdr.command != IPA_CMD_MODCCID &&
 589                     cmd->hdr.command != IPA_CMD_SET_DIAG_ASS)
 590                         qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
 591                 return cmd;
 592         }
 593
 594         /* handle unsolicited event: */
 595         switch (cmd->hdr.command) {
 596         case IPA_CMD_STOPLAN:
 597                 if (cmd->hdr.return_code == IPA_RC_VEPA_TO_VEB_TRANSITION) {
 598                         dev_err(&card->gdev->dev,
 599                                 "Interface %s is down because the adjacent port is no longer in reflective relay mode\n",
 600                                 QETH_CARD_IFNAME(card));
 601                         schedule_work(&card->close_dev_work);
 602                 } else {
 603                         dev_warn(&card->gdev->dev,
 604                                  "The link for interface %s on CHPID 0x%X failed\n",
 605                                  QETH_CARD_IFNAME(card), card->info.chpid);
 606                         qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
 607                         netif_carrier_off(card->dev);
 608                 }
 609                 return NULL;
 610         case IPA_CMD_STARTLAN:
 611                 dev_info(&card->gdev->dev,
 612                          "The link for %s on CHPID 0x%X has been restored\n",
 613                          QETH_CARD_IFNAME(card), card->info.chpid);
 614                 if (card->info.hwtrap)
 615                         card->info.hwtrap = 2;
 616                 qeth_schedule_recovery(card);
 617                 return NULL;
 618         case IPA_CMD_SETBRIDGEPORT_IQD:
 619         case IPA_CMD_SETBRIDGEPORT_OSA:
 620         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
 621                 if (card->discipline->control_event_handler(card, cmd))
 622                         return cmd;
 623                 return NULL;
 624         case IPA_CMD_MODCCID:
 625                 return cmd;
 626         case IPA_CMD_REGISTER_LOCAL_ADDR:
 627                 QETH_CARD_TEXT(card, 3, "irla");
 628                 return NULL;
 629         case IPA_CMD_UNREGISTER_LOCAL_ADDR:
 630                 QETH_CARD_TEXT(card, 3, "urla");
 631                 return NULL;
 632         default:
 633                 QETH_DBF_MESSAGE(2, "Received data is IPA but not a reply!\n");
 634                 return cmd;
 635         }
 636 }
 637
 638 void qeth_clear_ipacmd_list(struct qeth_card *card)
 639 {
 640         struct qeth_cmd_buffer *iob;
 641         unsigned long flags;
 642
 643         QETH_CARD_TEXT(card, 4, "clipalst");
 644
 645         spin_lock_irqsave(&card->lock, flags);
 646         list_for_each_entry(iob, &card->cmd_waiter_list, list)
 647                 qeth_notify_cmd(iob, -EIO);
 648         spin_unlock_irqrestore(&card->lock, flags);
 649 }
 650 EXPORT_SYMBOL_GPL(qeth_clear_ipacmd_list);
 651
 652 static int qeth_check_idx_response(struct qeth_card *card,
 653         unsigned char *buffer)
 654 {
 655         QETH_DBF_HEX(CTRL, 2, buffer, QETH_DBF_CTRL_LEN);
 656         if ((buffer[2] & 0xc0) == 0xc0) {
 657                 QETH_DBF_MESSAGE(2, "received an IDX TERMINATE with cause code %#04x\n",
 658                                  buffer[4]);
 659                 QETH_CARD_TEXT(card, 2, "ckidxres");
 660                 QETH_CARD_TEXT(card, 2, " idxterm");
 661                 QETH_CARD_TEXT_(card, 2, "  rc%d", -EIO);
 662                 if (buffer[4] == 0xf6) {
 663                         dev_err(&card->gdev->dev,
 664                         "The qeth device is not configured "
 665                         "for the OSI layer required by z/VM\n");
 666                         return -EPERM;
 667                 }
 668                 return -EIO;
 669         }
 670         return 0;
 671 }
 672
 673 void qeth_put_cmd(struct qeth_cmd_buffer *iob)
 674 {
 675         if (refcount_dec_and_test(&iob->ref_count)) {
 676                 kfree(iob->data);
 677                 kfree(iob);
 678         }
 679 }
 680 EXPORT_SYMBOL_GPL(qeth_put_cmd);
 681
 682 static void qeth_release_buffer_cb(struct qeth_card *card,
 683                                    struct qeth_cmd_buffer *iob,
 684                                    unsigned int data_length)
 685 {
 686         qeth_put_cmd(iob);
 687 }
 688
 689 static void qeth_cancel_cmd(struct qeth_cmd_buffer *iob, int rc)
 690 {
 691         qeth_notify_cmd(iob, rc);
 692         qeth_put_cmd(iob);
 693 }
 694
 695 struct qeth_cmd_buffer *qeth_alloc_cmd(struct qeth_channel *channel,
 696                                        unsigned int length, unsigned int ccws,
 697                                        long timeout)
 698 {
 699         struct qeth_cmd_buffer *iob;
 700
 701         if (length > QETH_BUFSIZE)
 702                 return NULL;
 703
 704         iob = kzalloc(sizeof(*iob), GFP_KERNEL);
 705         if (!iob)
 706                 return NULL;
 707
 708         iob->data = kzalloc(ALIGN(length, 8) + ccws * sizeof(struct ccw1),
 709                             GFP_KERNEL | GFP_DMA);
 710         if (!iob->data) {
 711                 kfree(iob);
 712                 return NULL;
 713         }
 714
 715         init_completion(&iob->done);
 716         spin_lock_init(&iob->lock);
 717         INIT_LIST_HEAD(&iob->list);
 718         refcount_set(&iob->ref_count, 1);
 719         iob->channel = channel;
 720         iob->timeout = timeout;
 721         iob->length = length;
 722         return iob;
 723 }
 724 EXPORT_SYMBOL_GPL(qeth_alloc_cmd);
 725
 726 static void qeth_issue_next_read_cb(struct qeth_card *card,
 727                                     struct qeth_cmd_buffer *iob,
 728                                     unsigned int data_length)
 729 {
 730         struct qeth_cmd_buffer *request = NULL;
 731         struct qeth_ipa_cmd *cmd = NULL;
 732         struct qeth_reply *reply = NULL;
 733         struct qeth_cmd_buffer *tmp;
 734         unsigned long flags;
 735         int rc = 0;
 736
 737         QETH_CARD_TEXT(card, 4, "sndctlcb");
 738         rc = qeth_check_idx_response(card, iob->data);
 739         switch (rc) {
 740         case 0:
 741                 break;
 742         case -EIO:
 743                 qeth_clear_ipacmd_list(card);
 744                 qeth_schedule_recovery(card);
 745                 /* fall through */
 746         default:
 747                 goto out;
 748         }
 749
 750         if (IS_IPA(iob->data)) {
 751                 cmd = (struct qeth_ipa_cmd *) PDU_ENCAPSULATION(iob->data);
 752                 cmd = qeth_check_ipa_data(card, cmd);
 753                 if (!cmd)
 754                         goto out;
 755                 if (IS_OSN(card) && card->osn_info.assist_cb &&
 756                     cmd->hdr.command != IPA_CMD_STARTLAN) {
 757                         card->osn_info.assist_cb(card->dev, cmd);
 758                         goto out;
 759                 }
 760         } else {
 761                 /* non-IPA commands should only flow during initialization */
 762                 if (card->state != CARD_STATE_DOWN)
 763                         goto out;
 764         }
 765
 766         /* match against pending cmd requests */
 767         spin_lock_irqsave(&card->lock, flags);
 768         list_for_each_entry(tmp, &card->cmd_waiter_list, list) {
 769                 if (!IS_IPA(tmp->data) ||
 770                     __ipa_cmd(tmp)->hdr.seqno == cmd->hdr.seqno) {
 771                         request = tmp;
 772                         /* take the object outside the lock */
 773                         qeth_get_cmd(request);
 774                         break;
 775                 }
 776         }
 777         spin_unlock_irqrestore(&card->lock, flags);
 778
 779         if (!request)
 780                 goto out;
 781
 782         reply = &request->reply;
 783         if (!reply->callback) {
 784                 rc = 0;
 785                 goto no_callback;
 786         }
 787
 788         spin_lock_irqsave(&request->lock, flags);
 789         if (request->rc)
 790                 /* Bail out when the requestor has already left: */
 791                 rc = request->rc;
 792         else
 793                 rc = reply->callback(card, reply, cmd ? (unsigned long)cmd :
 794                                                         (unsigned long)iob);
 795         spin_unlock_irqrestore(&request->lock, flags);
 796
 797 no_callback:
 798         if (rc <= 0)
 799                 qeth_notify_cmd(request, rc);
 800         qeth_put_cmd(request);
 801 out:
 802         memcpy(&card->seqno.pdu_hdr_ack,
 803                 QETH_PDU_HEADER_SEQ_NO(iob->data),
 804                 QETH_SEQ_NO_LENGTH);
 805         qeth_put_cmd(iob);
 806         __qeth_issue_next_read(card);
 807 }
 808
 809 static int qeth_set_thread_start_bit(struct qeth_card *card,
 810                 unsigned long thread)
 811 {
 812         unsigned long flags;
 813
 814         spin_lock_irqsave(&card->thread_mask_lock, flags);
 815         if (!(card->thread_allowed_mask & thread) ||
 816               (card->thread_start_mask & thread)) {
 817                 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 818                 return -EPERM;
 819         }
 820         card->thread_start_mask |= thread;
 821         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 822         return 0;
 823 }
 824
 825 void qeth_clear_thread_start_bit(struct qeth_card *card, unsigned long thread)
 826 {
 827         unsigned long flags;
 828
 829         spin_lock_irqsave(&card->thread_mask_lock, flags);
 830         card->thread_start_mask &= ~thread;
 831         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 832         wake_up(&card->wait_q);
 833 }
 834 EXPORT_SYMBOL_GPL(qeth_clear_thread_start_bit);
 835
 836 void qeth_clear_thread_running_bit(struct qeth_card *card, unsigned long thread)
 837 {
 838         unsigned long flags;
 839
 840         spin_lock_irqsave(&card->thread_mask_lock, flags);
 841         card->thread_running_mask &= ~thread;
 842         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 843         wake_up_all(&card->wait_q);
 844 }
 845 EXPORT_SYMBOL_GPL(qeth_clear_thread_running_bit);
 846
 847 static int __qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
 848 {
 849         unsigned long flags;
 850         int rc = 0;
 851
 852         spin_lock_irqsave(&card->thread_mask_lock, flags);
 853         if (card->thread_start_mask & thread) {
 854                 if ((card->thread_allowed_mask & thread) &&
 855                     !(card->thread_running_mask & thread)) {
 856                         rc = 1;
 857                         card->thread_start_mask &= ~thread;
 858                         card->thread_running_mask |= thread;
 859                 } else
 860                         rc = -EPERM;
 861         }
 862         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 863         return rc;
 864 }
 865
 866 int qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
 867 {
 868         int rc = 0;
 869
 870         wait_event(card->wait_q,
 871                    (rc = __qeth_do_run_thread(card, thread)) >= 0);
 872         return rc;
 873 }
 874 EXPORT_SYMBOL_GPL(qeth_do_run_thread);
 875
 876 void qeth_schedule_recovery(struct qeth_card *card)
 877 {
 878         QETH_CARD_TEXT(card, 2, "startrec");
 879         if (qeth_set_thread_start_bit(card, QETH_RECOVER_THREAD) == 0)
 880                 schedule_work(&card->kernel_thread_starter);
 881 }
 882 EXPORT_SYMBOL_GPL(qeth_schedule_recovery);
 883
 884 static int qeth_get_problem(struct qeth_card *card, struct ccw_device *cdev,
 885                             struct irb *irb)
 886 {
 887         int dstat, cstat;
 888         char *sense;
 889
 890         sense = (char *) irb->ecw;
 891         cstat = irb->scsw.cmd.cstat;
 892         dstat = irb->scsw.cmd.dstat;
 893
 894         if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK |
 895                      SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK |
 896                      SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) {
 897                 QETH_CARD_TEXT(card, 2, "CGENCHK");
 898                 dev_warn(&cdev->dev, "The qeth device driver "
 899                         "failed to recover an error on the device\n");
 900                 QETH_DBF_MESSAGE(2, "check on channel %x with dstat=%#x, cstat=%#x\n",
 901                                  CCW_DEVID(cdev), dstat, cstat);
 902                 print_hex_dump(KERN_WARNING, "qeth: irb ", DUMP_PREFIX_OFFSET,
 903                                 16, 1, irb, 64, 1);
 904                 return -EIO;
 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 -EIO;
 912                 }
 913                 if (sense[SENSE_COMMAND_REJECT_BYTE] &
 914                     SENSE_COMMAND_REJECT_FLAG) {
 915                         QETH_CARD_TEXT(card, 2, "CMDREJi");
 916                         return -EIO;
 917                 }
 918                 if ((sense[2] == 0xaf) && (sense[3] == 0xfe)) {
 919                         QETH_CARD_TEXT(card, 2, "AFFE");
 920                         return -EIO;
 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 -EIO;
 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         port |= QETH_IDX_ACT_INVAL_FRAME;
1960         memcpy(QETH_IDX_ACT_PNO(iob->data), &port, 1);
1961         memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
1962                &card->token.issuer_rm_w, QETH_MPC_TOKEN_LENGTH);
1963         memcpy(QETH_IDX_ACT_FUNC_LEVEL(iob->data),
1964                &card->info.func_level, 2);
1965         memcpy(QETH_IDX_ACT_QDIO_DEV_CUA(iob->data), &dev_id.devno, 2);
1966         memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &addr, 2);
1967 }
1968
1969 static int qeth_idx_activate_read_channel(struct qeth_card *card)
1970 {
1971         struct qeth_channel *channel = &card->read;
1972         struct qeth_cmd_buffer *iob;
1973         int rc;
1974
1975         QETH_CARD_TEXT(card, 2, "idxread");
1976
1977         iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
1978         if (!iob)
1979                 return -ENOMEM;
1980
1981         memcpy(iob->data, IDX_ACTIVATE_READ, IDX_ACTIVATE_SIZE);
1982         qeth_idx_setup_activate_cmd(card, iob);
1983         iob->callback = qeth_idx_activate_read_channel_cb;
1984
1985         rc = qeth_send_control_data(card, iob, NULL, NULL);
1986         if (rc)
1987                 return rc;
1988
1989         channel->state = CH_STATE_UP;
1990         return 0;
1991 }
1992
1993 static int qeth_idx_activate_write_channel(struct qeth_card *card)
1994 {
1995         struct qeth_channel *channel = &card->write;
1996         struct qeth_cmd_buffer *iob;
1997         int rc;
1998
1999         QETH_CARD_TEXT(card, 2, "idxwrite");
2000
2001         iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
2002         if (!iob)
2003                 return -ENOMEM;
2004
2005         memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE);
2006         qeth_idx_setup_activate_cmd(card, iob);
2007         iob->callback = qeth_idx_activate_write_channel_cb;
2008
2009         rc = qeth_send_control_data(card, iob, NULL, NULL);
2010         if (rc)
2011                 return rc;
2012
2013         channel->state = CH_STATE_UP;
2014         return 0;
2015 }
2016
2017 static int qeth_cm_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2018                 unsigned long data)
2019 {
2020         struct qeth_cmd_buffer *iob;
2021
2022         QETH_CARD_TEXT(card, 2, "cmenblcb");
2023
2024         iob = (struct qeth_cmd_buffer *) data;
2025         memcpy(&card->token.cm_filter_r,
2026                QETH_CM_ENABLE_RESP_FILTER_TOKEN(iob->data),
2027                QETH_MPC_TOKEN_LENGTH);
2028         return 0;
2029 }
2030
2031 static int qeth_cm_enable(struct qeth_card *card)
2032 {
2033         struct qeth_cmd_buffer *iob;
2034
2035         QETH_CARD_TEXT(card, 2, "cmenable");
2036
2037         iob = qeth_mpc_alloc_cmd(card, CM_ENABLE, CM_ENABLE_SIZE);
2038         if (!iob)
2039                 return -ENOMEM;
2040
2041         memcpy(QETH_CM_ENABLE_ISSUER_RM_TOKEN(iob->data),
2042                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2043         memcpy(QETH_CM_ENABLE_FILTER_TOKEN(iob->data),
2044                &card->token.cm_filter_w, QETH_MPC_TOKEN_LENGTH);
2045
2046         return qeth_send_control_data(card, iob, qeth_cm_enable_cb, NULL);
2047 }
2048
2049 static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2050                 unsigned long data)
2051 {
2052         struct qeth_cmd_buffer *iob;
2053
2054         QETH_CARD_TEXT(card, 2, "cmsetpcb");
2055
2056         iob = (struct qeth_cmd_buffer *) data;
2057         memcpy(&card->token.cm_connection_r,
2058                QETH_CM_SETUP_RESP_DEST_ADDR(iob->data),
2059                QETH_MPC_TOKEN_LENGTH);
2060         return 0;
2061 }
2062
2063 static int qeth_cm_setup(struct qeth_card *card)
2064 {
2065         struct qeth_cmd_buffer *iob;
2066
2067         QETH_CARD_TEXT(card, 2, "cmsetup");
2068
2069         iob = qeth_mpc_alloc_cmd(card, CM_SETUP, CM_SETUP_SIZE);
2070         if (!iob)
2071                 return -ENOMEM;
2072
2073         memcpy(QETH_CM_SETUP_DEST_ADDR(iob->data),
2074                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2075         memcpy(QETH_CM_SETUP_CONNECTION_TOKEN(iob->data),
2076                &card->token.cm_connection_w, QETH_MPC_TOKEN_LENGTH);
2077         memcpy(QETH_CM_SETUP_FILTER_TOKEN(iob->data),
2078                &card->token.cm_filter_r, QETH_MPC_TOKEN_LENGTH);
2079         return qeth_send_control_data(card, iob, qeth_cm_setup_cb, NULL);
2080 }
2081
2082 static int qeth_update_max_mtu(struct qeth_card *card, unsigned int max_mtu)
2083 {
2084         struct net_device *dev = card->dev;
2085         unsigned int new_mtu;
2086
2087         if (!max_mtu) {
2088                 /* IQD needs accurate max MTU to set up its RX buffers: */
2089                 if (IS_IQD(card))
2090                         return -EINVAL;
2091                 /* tolerate quirky HW: */
2092                 max_mtu = ETH_MAX_MTU;
2093         }
2094
2095         rtnl_lock();
2096         if (IS_IQD(card)) {
2097                 /* move any device with default MTU to new max MTU: */
2098                 new_mtu = (dev->mtu == dev->max_mtu) ? max_mtu : dev->mtu;
2099
2100                 /* adjust RX buffer size to new max MTU: */
2101                 card->qdio.in_buf_size = max_mtu + 2 * PAGE_SIZE;
2102                 if (dev->max_mtu && dev->max_mtu != max_mtu)
2103                         qeth_free_qdio_queues(card);
2104         } else {
2105                 if (dev->mtu)
2106                         new_mtu = dev->mtu;
2107                 /* default MTUs for first setup: */
2108                 else if (IS_LAYER2(card))
2109                         new_mtu = ETH_DATA_LEN;
2110                 else
2111                         new_mtu = ETH_DATA_LEN - 8; /* allow for LLC + SNAP */
2112         }
2113
2114         dev->max_mtu = max_mtu;
2115         dev->mtu = min(new_mtu, max_mtu);
2116         rtnl_unlock();
2117         return 0;
2118 }
2119
2120 static int qeth_get_mtu_outof_framesize(int framesize)
2121 {
2122         switch (framesize) {
2123         case 0x4000:
2124                 return 8192;
2125         case 0x6000:
2126                 return 16384;
2127         case 0xa000:
2128                 return 32768;
2129         case 0xffff:
2130                 return 57344;
2131         default:
2132                 return 0;
2133         }
2134 }
2135
2136 static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2137                 unsigned long data)
2138 {
2139         __u16 mtu, framesize;
2140         __u16 len;
2141         __u8 link_type;
2142         struct qeth_cmd_buffer *iob;
2143
2144         QETH_CARD_TEXT(card, 2, "ulpenacb");
2145
2146         iob = (struct qeth_cmd_buffer *) data;
2147         memcpy(&card->token.ulp_filter_r,
2148                QETH_ULP_ENABLE_RESP_FILTER_TOKEN(iob->data),
2149                QETH_MPC_TOKEN_LENGTH);
2150         if (IS_IQD(card)) {
2151                 memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2);
2152                 mtu = qeth_get_mtu_outof_framesize(framesize);
2153         } else {
2154                 mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data);
2155         }
2156         *(u16 *)reply->param = mtu;
2157
2158         memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2);
2159         if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) {
2160                 memcpy(&link_type,
2161                        QETH_ULP_ENABLE_RESP_LINK_TYPE(iob->data), 1);
2162                 card->info.link_type = link_type;
2163         } else
2164                 card->info.link_type = 0;
2165         QETH_CARD_TEXT_(card, 2, "link%d", card->info.link_type);
2166         return 0;
2167 }
2168
2169 static u8 qeth_mpc_select_prot_type(struct qeth_card *card)
2170 {
2171         if (IS_OSN(card))
2172                 return QETH_PROT_OSN2;
2173         return IS_LAYER2(card) ? QETH_PROT_LAYER2 : QETH_PROT_TCPIP;
2174 }
2175
2176 static int qeth_ulp_enable(struct qeth_card *card)
2177 {
2178         u8 prot_type = qeth_mpc_select_prot_type(card);
2179         struct qeth_cmd_buffer *iob;
2180         u16 max_mtu;
2181         int rc;
2182
2183         QETH_CARD_TEXT(card, 2, "ulpenabl");
2184
2185         iob = qeth_mpc_alloc_cmd(card, ULP_ENABLE, ULP_ENABLE_SIZE);
2186         if (!iob)
2187                 return -ENOMEM;
2188
2189         *(QETH_ULP_ENABLE_LINKNUM(iob->data)) = (u8) card->dev->dev_port;
2190         memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1);
2191         memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data),
2192                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2193         memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data),
2194                &card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH);
2195         rc = qeth_send_control_data(card, iob, qeth_ulp_enable_cb, &max_mtu);
2196         if (rc)
2197                 return rc;
2198         return qeth_update_max_mtu(card, max_mtu);
2199 }
2200
2201 static int qeth_ulp_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2202                 unsigned long data)
2203 {
2204         struct qeth_cmd_buffer *iob;
2205
2206         QETH_CARD_TEXT(card, 2, "ulpstpcb");
2207
2208         iob = (struct qeth_cmd_buffer *) data;
2209         memcpy(&card->token.ulp_connection_r,
2210                QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2211                QETH_MPC_TOKEN_LENGTH);
2212         if (!strncmp("00S", QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2213                      3)) {
2214                 QETH_CARD_TEXT(card, 2, "olmlimit");
2215                 dev_err(&card->gdev->dev, "A connection could not be "
2216                         "established because of an OLM limit\n");
2217                 return -EMLINK;
2218         }
2219         return 0;
2220 }
2221
2222 static int qeth_ulp_setup(struct qeth_card *card)
2223 {
2224         __u16 temp;
2225         struct qeth_cmd_buffer *iob;
2226         struct ccw_dev_id dev_id;
2227
2228         QETH_CARD_TEXT(card, 2, "ulpsetup");
2229
2230         iob = qeth_mpc_alloc_cmd(card, ULP_SETUP, ULP_SETUP_SIZE);
2231         if (!iob)
2232                 return -ENOMEM;
2233
2234         memcpy(QETH_ULP_SETUP_DEST_ADDR(iob->data),
2235                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2236         memcpy(QETH_ULP_SETUP_CONNECTION_TOKEN(iob->data),
2237                &card->token.ulp_connection_w, QETH_MPC_TOKEN_LENGTH);
2238         memcpy(QETH_ULP_SETUP_FILTER_TOKEN(iob->data),
2239                &card->token.ulp_filter_r, QETH_MPC_TOKEN_LENGTH);
2240
2241         ccw_device_get_id(CARD_DDEV(card), &dev_id);
2242         memcpy(QETH_ULP_SETUP_CUA(iob->data), &dev_id.devno, 2);
2243         temp = (card->info.cula << 8) + card->info.unit_addr2;
2244         memcpy(QETH_ULP_SETUP_REAL_DEVADDR(iob->data), &temp, 2);
2245         return qeth_send_control_data(card, iob, qeth_ulp_setup_cb, NULL);
2246 }
2247
2248 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *q, int bidx)
2249 {
2250         struct qeth_qdio_out_buffer *newbuf;
2251
2252         newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, GFP_ATOMIC);
2253         if (!newbuf)
2254                 return -ENOMEM;
2255
2256         newbuf->buffer = q->qdio_bufs[bidx];
2257         skb_queue_head_init(&newbuf->skb_list);
2258         lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key);
2259         newbuf->q = q;
2260         newbuf->next_pending = q->bufs[bidx];
2261         atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY);
2262         q->bufs[bidx] = newbuf;
2263         return 0;
2264 }
2265
2266 static void qeth_free_output_queue(struct qeth_qdio_out_q *q)
2267 {
2268         if (!q)
2269                 return;
2270
2271         qeth_drain_output_queue(q, true);
2272         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2273         kfree(q);
2274 }
2275
2276 static struct qeth_qdio_out_q *qeth_alloc_output_queue(void)
2277 {
2278         struct qeth_qdio_out_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
2279
2280         if (!q)
2281                 return NULL;
2282
2283         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
2284                 kfree(q);
2285                 return NULL;
2286         }
2287         return q;
2288 }
2289
2290 static void qeth_tx_completion_timer(struct timer_list *timer)
2291 {
2292         struct qeth_qdio_out_q *queue = from_timer(queue, timer, timer);
2293
2294         napi_schedule(&queue->napi);
2295         QETH_TXQ_STAT_INC(queue, completion_timer);
2296 }
2297
2298 static int qeth_alloc_qdio_queues(struct qeth_card *card)
2299 {
2300         int i, j;
2301
2302         QETH_CARD_TEXT(card, 2, "allcqdbf");
2303
2304         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED,
2305                 QETH_QDIO_ALLOCATED) != QETH_QDIO_UNINITIALIZED)
2306                 return 0;
2307
2308         QETH_CARD_TEXT(card, 2, "inq");
2309         card->qdio.in_q = qeth_alloc_qdio_queue();
2310         if (!card->qdio.in_q)
2311                 goto out_nomem;
2312
2313         /* inbound buffer pool */
2314         if (qeth_alloc_buffer_pool(card))
2315                 goto out_freeinq;
2316
2317         /* outbound */
2318         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2319                 struct qeth_qdio_out_q *queue;
2320
2321                 queue = qeth_alloc_output_queue();
2322                 if (!queue)
2323                         goto out_freeoutq;
2324                 QETH_CARD_TEXT_(card, 2, "outq %i", i);
2325                 QETH_CARD_HEX(card, 2, &queue, sizeof(void *));
2326                 card->qdio.out_qs[i] = queue;
2327                 queue->card = card;
2328                 queue->queue_no = i;
2329                 timer_setup(&queue->timer, qeth_tx_completion_timer, 0);
2330
2331                 /* give outbound qeth_qdio_buffers their qdio_buffers */
2332                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2333                         WARN_ON(queue->bufs[j]);
2334                         if (qeth_init_qdio_out_buf(queue, j))
2335                                 goto out_freeoutqbufs;
2336                 }
2337         }
2338
2339         /* completion */
2340         if (qeth_alloc_cq(card))
2341                 goto out_freeoutq;
2342
2343         return 0;
2344
2345 out_freeoutqbufs:
2346         while (j > 0) {
2347                 --j;
2348                 kmem_cache_free(qeth_qdio_outbuf_cache,
2349                                 card->qdio.out_qs[i]->bufs[j]);
2350                 card->qdio.out_qs[i]->bufs[j] = NULL;
2351         }
2352 out_freeoutq:
2353         while (i > 0) {
2354                 qeth_free_output_queue(card->qdio.out_qs[--i]);
2355                 card->qdio.out_qs[i] = NULL;
2356         }
2357         qeth_free_buffer_pool(card);
2358 out_freeinq:
2359         qeth_free_qdio_queue(card->qdio.in_q);
2360         card->qdio.in_q = NULL;
2361 out_nomem:
2362         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
2363         return -ENOMEM;
2364 }
2365
2366 static void qeth_free_qdio_queues(struct qeth_card *card)
2367 {
2368         int i, j;
2369
2370         if (atomic_xchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED) ==
2371                 QETH_QDIO_UNINITIALIZED)
2372                 return;
2373
2374         qeth_free_cq(card);
2375         cancel_delayed_work_sync(&card->buffer_reclaim_work);
2376         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2377                 if (card->qdio.in_q->bufs[j].rx_skb)
2378                         dev_kfree_skb_any(card->qdio.in_q->bufs[j].rx_skb);
2379         }
2380         qeth_free_qdio_queue(card->qdio.in_q);
2381         card->qdio.in_q = NULL;
2382         /* inbound buffer pool */
2383         qeth_free_buffer_pool(card);
2384         /* free outbound qdio_qs */
2385         for (i = 0; i < card->qdio.no_out_queues; i++) {
2386                 qeth_free_output_queue(card->qdio.out_qs[i]);
2387                 card->qdio.out_qs[i] = NULL;
2388         }
2389 }
2390
2391 static void qeth_create_qib_param_field(struct qeth_card *card,
2392                 char *param_field)
2393 {
2394
2395         param_field[0] = _ascebc['P'];
2396         param_field[1] = _ascebc['C'];
2397         param_field[2] = _ascebc['I'];
2398         param_field[3] = _ascebc['T'];
2399         *((unsigned int *) (&param_field[4])) = QETH_PCI_THRESHOLD_A(card);
2400         *((unsigned int *) (&param_field[8])) = QETH_PCI_THRESHOLD_B(card);
2401         *((unsigned int *) (&param_field[12])) = QETH_PCI_TIMER_VALUE(card);
2402 }
2403
2404 static void qeth_create_qib_param_field_blkt(struct qeth_card *card,
2405                 char *param_field)
2406 {
2407         param_field[16] = _ascebc['B'];
2408         param_field[17] = _ascebc['L'];
2409         param_field[18] = _ascebc['K'];
2410         param_field[19] = _ascebc['T'];
2411         *((unsigned int *) (&param_field[20])) = card->info.blkt.time_total;
2412         *((unsigned int *) (&param_field[24])) = card->info.blkt.inter_packet;
2413         *((unsigned int *) (&param_field[28])) =
2414                 card->info.blkt.inter_packet_jumbo;
2415 }
2416
2417 static int qeth_qdio_activate(struct qeth_card *card)
2418 {
2419         QETH_CARD_TEXT(card, 3, "qdioact");
2420         return qdio_activate(CARD_DDEV(card));
2421 }
2422
2423 static int qeth_dm_act(struct qeth_card *card)
2424 {
2425         struct qeth_cmd_buffer *iob;
2426
2427         QETH_CARD_TEXT(card, 2, "dmact");
2428
2429         iob = qeth_mpc_alloc_cmd(card, DM_ACT, DM_ACT_SIZE);
2430         if (!iob)
2431                 return -ENOMEM;
2432
2433         memcpy(QETH_DM_ACT_DEST_ADDR(iob->data),
2434                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2435         memcpy(QETH_DM_ACT_CONNECTION_TOKEN(iob->data),
2436                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2437         return qeth_send_control_data(card, iob, NULL, NULL);
2438 }
2439
2440 static int qeth_mpc_initialize(struct qeth_card *card)
2441 {
2442         int rc;
2443
2444         QETH_CARD_TEXT(card, 2, "mpcinit");
2445
2446         rc = qeth_issue_next_read(card);
2447         if (rc) {
2448                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
2449                 return rc;
2450         }
2451         rc = qeth_cm_enable(card);
2452         if (rc) {
2453                 QETH_CARD_TEXT_(card, 2, "2err%d", rc);
2454                 goto out_qdio;
2455         }
2456         rc = qeth_cm_setup(card);
2457         if (rc) {
2458                 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
2459                 goto out_qdio;
2460         }
2461         rc = qeth_ulp_enable(card);
2462         if (rc) {
2463                 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
2464                 goto out_qdio;
2465         }
2466         rc = qeth_ulp_setup(card);
2467         if (rc) {
2468                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2469                 goto out_qdio;
2470         }
2471         rc = qeth_alloc_qdio_queues(card);
2472         if (rc) {
2473                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2474                 goto out_qdio;
2475         }
2476         rc = qeth_qdio_establish(card);
2477         if (rc) {
2478                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
2479                 qeth_free_qdio_queues(card);
2480                 goto out_qdio;
2481         }
2482         rc = qeth_qdio_activate(card);
2483         if (rc) {
2484                 QETH_CARD_TEXT_(card, 2, "7err%d", rc);
2485                 goto out_qdio;
2486         }
2487         rc = qeth_dm_act(card);
2488         if (rc) {
2489                 QETH_CARD_TEXT_(card, 2, "8err%d", rc);
2490                 goto out_qdio;
2491         }
2492
2493         return 0;
2494 out_qdio:
2495         qeth_qdio_clear_card(card, !IS_IQD(card));
2496         qdio_free(CARD_DDEV(card));
2497         return rc;
2498 }
2499
2500 void qeth_print_status_message(struct qeth_card *card)
2501 {
2502         switch (card->info.type) {
2503         case QETH_CARD_TYPE_OSD:
2504         case QETH_CARD_TYPE_OSM:
2505         case QETH_CARD_TYPE_OSX:
2506                 /* VM will use a non-zero first character
2507                  * to indicate a HiperSockets like reporting
2508                  * of the level OSA sets the first character to zero
2509                  * */
2510                 if (!card->info.mcl_level[0]) {
2511                         sprintf(card->info.mcl_level, "%02x%02x",
2512                                 card->info.mcl_level[2],
2513                                 card->info.mcl_level[3]);
2514                         break;
2515                 }
2516                 /* fallthrough */
2517         case QETH_CARD_TYPE_IQD:
2518                 if (IS_VM_NIC(card) || (card->info.mcl_level[0] & 0x80)) {
2519                         card->info.mcl_level[0] = (char) _ebcasc[(__u8)
2520                                 card->info.mcl_level[0]];
2521                         card->info.mcl_level[1] = (char) _ebcasc[(__u8)
2522                                 card->info.mcl_level[1]];
2523                         card->info.mcl_level[2] = (char) _ebcasc[(__u8)
2524                                 card->info.mcl_level[2]];
2525                         card->info.mcl_level[3] = (char) _ebcasc[(__u8)
2526                                 card->info.mcl_level[3]];
2527                         card->info.mcl_level[QETH_MCL_LENGTH] = 0;
2528                 }
2529                 break;
2530         default:
2531                 memset(&card->info.mcl_level[0], 0, QETH_MCL_LENGTH + 1);
2532         }
2533         dev_info(&card->gdev->dev,
2534                  "Device is a%s card%s%s%s\nwith link type %s.\n",
2535                  qeth_get_cardname(card),
2536                  (card->info.mcl_level[0]) ? " (level: " : "",
2537                  (card->info.mcl_level[0]) ? card->info.mcl_level : "",
2538                  (card->info.mcl_level[0]) ? ")" : "",
2539                  qeth_get_cardname_short(card));
2540 }
2541 EXPORT_SYMBOL_GPL(qeth_print_status_message);
2542
2543 static void qeth_initialize_working_pool_list(struct qeth_card *card)
2544 {
2545         struct qeth_buffer_pool_entry *entry;
2546
2547         QETH_CARD_TEXT(card, 5, "inwrklst");
2548
2549         list_for_each_entry(entry,
2550                             &card->qdio.init_pool.entry_list, init_list) {
2551                 qeth_put_buffer_pool_entry(card, entry);
2552         }
2553 }
2554
2555 static struct qeth_buffer_pool_entry *qeth_find_free_buffer_pool_entry(
2556                                         struct qeth_card *card)
2557 {
2558         struct list_head *plh;
2559         struct qeth_buffer_pool_entry *entry;
2560         int i, free;
2561         struct page *page;
2562
2563         if (list_empty(&card->qdio.in_buf_pool.entry_list))
2564                 return NULL;
2565
2566         list_for_each(plh, &card->qdio.in_buf_pool.entry_list) {
2567                 entry = list_entry(plh, struct qeth_buffer_pool_entry, list);
2568                 free = 1;
2569                 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2570                         if (page_count(virt_to_page(entry->elements[i])) > 1) {
2571                                 free = 0;
2572                                 break;
2573                         }
2574                 }
2575                 if (free) {
2576                         list_del_init(&entry->list);
2577                         return entry;
2578                 }
2579         }
2580
2581         /* no free buffer in pool so take first one and swap pages */
2582         entry = list_entry(card->qdio.in_buf_pool.entry_list.next,
2583                         struct qeth_buffer_pool_entry, list);
2584         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2585                 if (page_count(virt_to_page(entry->elements[i])) > 1) {
2586                         page = alloc_page(GFP_ATOMIC);
2587                         if (!page) {
2588                                 return NULL;
2589                         } else {
2590                                 free_page((unsigned long)entry->elements[i]);
2591                                 entry->elements[i] = page_address(page);
2592                                 QETH_CARD_STAT_INC(card, rx_sg_alloc_page);
2593                         }
2594                 }
2595         }
2596         list_del_init(&entry->list);
2597         return entry;
2598 }
2599
2600 static int qeth_init_input_buffer(struct qeth_card *card,
2601                 struct qeth_qdio_buffer *buf)
2602 {
2603         struct qeth_buffer_pool_entry *pool_entry;
2604         int i;
2605
2606         if ((card->options.cq == QETH_CQ_ENABLED) && (!buf->rx_skb)) {
2607                 buf->rx_skb = netdev_alloc_skb(card->dev,
2608                                                QETH_RX_PULL_LEN + ETH_HLEN);
2609                 if (!buf->rx_skb)
2610                         return 1;
2611         }
2612
2613         pool_entry = qeth_find_free_buffer_pool_entry(card);
2614         if (!pool_entry)
2615                 return 1;
2616
2617         /*
2618          * since the buffer is accessed only from the input_tasklet
2619          * there shouldn't be a need to synchronize; also, since we use
2620          * the QETH_IN_BUF_REQUEUE_THRESHOLD we should never run  out off
2621          * buffers
2622          */
2623
2624         buf->pool_entry = pool_entry;
2625         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2626                 buf->buffer->element[i].length = PAGE_SIZE;
2627                 buf->buffer->element[i].addr =  pool_entry->elements[i];
2628                 if (i == QETH_MAX_BUFFER_ELEMENTS(card) - 1)
2629                         buf->buffer->element[i].eflags = SBAL_EFLAGS_LAST_ENTRY;
2630                 else
2631                         buf->buffer->element[i].eflags = 0;
2632                 buf->buffer->element[i].sflags = 0;
2633         }
2634         return 0;
2635 }
2636
2637 static unsigned int qeth_tx_select_bulk_max(struct qeth_card *card,
2638                                             struct qeth_qdio_out_q *queue)
2639 {
2640         if (!IS_IQD(card) ||
2641             qeth_iqd_is_mcast_queue(card, queue) ||
2642             card->options.cq == QETH_CQ_ENABLED ||
2643             qdio_get_ssqd_desc(CARD_DDEV(card), &card->ssqd))
2644                 return 1;
2645
2646         return card->ssqd.mmwc ? card->ssqd.mmwc : 1;
2647 }
2648
2649 int qeth_init_qdio_queues(struct qeth_card *card)
2650 {
2651         unsigned int i;
2652         int rc;
2653
2654         QETH_CARD_TEXT(card, 2, "initqdqs");
2655
2656         /* inbound queue */
2657         qdio_reset_buffers(card->qdio.in_q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2658         memset(&card->rx, 0, sizeof(struct qeth_rx));
2659         qeth_initialize_working_pool_list(card);
2660         /*give only as many buffers to hardware as we have buffer pool entries*/
2661         for (i = 0; i < card->qdio.in_buf_pool.buf_count - 1; ++i)
2662                 qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]);
2663         card->qdio.in_q->next_buf_to_init =
2664                 card->qdio.in_buf_pool.buf_count - 1;
2665         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0, 0,
2666                      card->qdio.in_buf_pool.buf_count - 1);
2667         if (rc) {
2668                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
2669                 return rc;
2670         }
2671
2672         /* completion */
2673         rc = qeth_cq_init(card);
2674         if (rc) {
2675                 return rc;
2676         }
2677
2678         /* outbound queue */
2679         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2680                 struct qeth_qdio_out_q *queue = card->qdio.out_qs[i];
2681
2682                 qdio_reset_buffers(queue->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2683                 queue->max_elements = QETH_MAX_BUFFER_ELEMENTS(card);
2684                 queue->next_buf_to_fill = 0;
2685                 queue->do_pack = 0;
2686                 queue->prev_hdr = NULL;
2687                 queue->bulk_start = 0;
2688                 queue->bulk_count = 0;
2689                 queue->bulk_max = qeth_tx_select_bulk_max(card, queue);
2690                 atomic_set(&queue->used_buffers, 0);
2691                 atomic_set(&queue->set_pci_flags_count, 0);
2692                 atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
2693                 netdev_tx_reset_queue(netdev_get_tx_queue(card->dev, i));
2694         }
2695         return 0;
2696 }
2697 EXPORT_SYMBOL_GPL(qeth_init_qdio_queues);
2698
2699 static void qeth_ipa_finalize_cmd(struct qeth_card *card,
2700                                   struct qeth_cmd_buffer *iob)
2701 {
2702         qeth_mpc_finalize_cmd(card, iob);
2703
2704         /* override with IPA-specific values: */
2705         __ipa_cmd(iob)->hdr.seqno = card->seqno.ipa++;
2706 }
2707
2708 void qeth_prepare_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
2709                           u16 cmd_length)
2710 {
2711         u8 prot_type = qeth_mpc_select_prot_type(card);
2712         u16 total_length = iob->length;
2713
2714         qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, total_length,
2715                        iob->data);
2716         iob->finalize = qeth_ipa_finalize_cmd;
2717
2718         memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
2719         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &total_length, 2);
2720         memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1);
2721         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &cmd_length, 2);
2722         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &cmd_length, 2);
2723         memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
2724                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2725         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &cmd_length, 2);
2726 }
2727 EXPORT_SYMBOL_GPL(qeth_prepare_ipa_cmd);
2728
2729 struct qeth_cmd_buffer *qeth_ipa_alloc_cmd(struct qeth_card *card,
2730                                            enum qeth_ipa_cmds cmd_code,
2731                                            enum qeth_prot_versions prot,
2732                                            unsigned int data_length)
2733 {
2734         enum qeth_link_types link_type = card->info.link_type;
2735         struct qeth_cmd_buffer *iob;
2736         struct qeth_ipacmd_hdr *hdr;
2737
2738         data_length += offsetof(struct qeth_ipa_cmd, data);
2739         iob = qeth_alloc_cmd(&card->write, IPA_PDU_HEADER_SIZE + data_length, 1,
2740                              QETH_IPA_TIMEOUT);
2741         if (!iob)
2742                 return NULL;
2743
2744         qeth_prepare_ipa_cmd(card, iob, data_length);
2745
2746         hdr = &__ipa_cmd(iob)->hdr;
2747         hdr->command = cmd_code;
2748         hdr->initiator = IPA_CMD_INITIATOR_HOST;
2749         /* hdr->seqno is set by qeth_send_control_data() */
2750         hdr->adapter_type = (link_type == QETH_LINK_TYPE_HSTR) ? 2 : 1;
2751         hdr->rel_adapter_no = (u8) card->dev->dev_port;
2752         hdr->prim_version_no = IS_LAYER2(card) ? 2 : 1;
2753         hdr->param_count = 1;
2754         hdr->prot_version = prot;
2755         return iob;
2756 }
2757 EXPORT_SYMBOL_GPL(qeth_ipa_alloc_cmd);
2758
2759 static int qeth_send_ipa_cmd_cb(struct qeth_card *card,
2760                                 struct qeth_reply *reply, unsigned long data)
2761 {
2762         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2763
2764         return (cmd->hdr.return_code) ? -EIO : 0;
2765 }
2766
2767 /**
2768  * qeth_send_ipa_cmd() - send an IPA command
2769  *
2770  * See qeth_send_control_data() for explanation of the arguments.
2771  */
2772
2773 int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
2774                 int (*reply_cb)(struct qeth_card *, struct qeth_reply*,
2775                         unsigned long),
2776                 void *reply_param)
2777 {
2778         int rc;
2779
2780         QETH_CARD_TEXT(card, 4, "sendipa");
2781
2782         if (card->read_or_write_problem) {
2783                 qeth_put_cmd(iob);
2784                 return -EIO;
2785         }
2786
2787         if (reply_cb == NULL)
2788                 reply_cb = qeth_send_ipa_cmd_cb;
2789         rc = qeth_send_control_data(card, iob, reply_cb, reply_param);
2790         if (rc == -ETIME) {
2791                 qeth_clear_ipacmd_list(card);
2792                 qeth_schedule_recovery(card);
2793         }
2794         return rc;
2795 }
2796 EXPORT_SYMBOL_GPL(qeth_send_ipa_cmd);
2797
2798 static int qeth_send_startlan_cb(struct qeth_card *card,
2799                                  struct qeth_reply *reply, unsigned long data)
2800 {
2801         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2802
2803         if (cmd->hdr.return_code == IPA_RC_LAN_OFFLINE)
2804                 return -ENETDOWN;
2805
2806         return (cmd->hdr.return_code) ? -EIO : 0;
2807 }
2808
2809 static int qeth_send_startlan(struct qeth_card *card)
2810 {
2811         struct qeth_cmd_buffer *iob;
2812
2813         QETH_CARD_TEXT(card, 2, "strtlan");
2814
2815         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_STARTLAN, QETH_PROT_NONE, 0);
2816         if (!iob)
2817                 return -ENOMEM;
2818         return qeth_send_ipa_cmd(card, iob, qeth_send_startlan_cb, NULL);
2819 }
2820
2821 static int qeth_setadpparms_inspect_rc(struct qeth_ipa_cmd *cmd)
2822 {
2823         if (!cmd->hdr.return_code)
2824                 cmd->hdr.return_code =
2825                         cmd->data.setadapterparms.hdr.return_code;
2826         return cmd->hdr.return_code;
2827 }
2828
2829 static int qeth_query_setadapterparms_cb(struct qeth_card *card,
2830                 struct qeth_reply *reply, unsigned long data)
2831 {
2832         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2833
2834         QETH_CARD_TEXT(card, 3, "quyadpcb");
2835         if (qeth_setadpparms_inspect_rc(cmd))
2836                 return -EIO;
2837
2838         if (cmd->data.setadapterparms.data.query_cmds_supp.lan_type & 0x7f) {
2839                 card->info.link_type =
2840                       cmd->data.setadapterparms.data.query_cmds_supp.lan_type;
2841                 QETH_CARD_TEXT_(card, 2, "lnk %d", card->info.link_type);
2842         }
2843         card->options.adp.supported_funcs =
2844                 cmd->data.setadapterparms.data.query_cmds_supp.supported_cmds;
2845         return 0;
2846 }
2847
2848 static struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card,
2849                                                     enum qeth_ipa_setadp_cmd adp_cmd,
2850                                                     unsigned int data_length)
2851 {
2852         struct qeth_ipacmd_setadpparms_hdr *hdr;
2853         struct qeth_cmd_buffer *iob;
2854
2855         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETADAPTERPARMS, QETH_PROT_IPV4,
2856                                  data_length +
2857                                  offsetof(struct qeth_ipacmd_setadpparms,
2858                                           data));
2859         if (!iob)
2860                 return NULL;
2861
2862         hdr = &__ipa_cmd(iob)->data.setadapterparms.hdr;
2863         hdr->cmdlength = sizeof(*hdr) + data_length;
2864         hdr->command_code = adp_cmd;
2865         hdr->used_total = 1;
2866         hdr->seq_no = 1;
2867         return iob;
2868 }
2869
2870 static int qeth_query_setadapterparms(struct qeth_card *card)
2871 {
2872         int rc;
2873         struct qeth_cmd_buffer *iob;
2874
2875         QETH_CARD_TEXT(card, 3, "queryadp");
2876         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_COMMANDS_SUPPORTED,
2877                                    SETADP_DATA_SIZEOF(query_cmds_supp));
2878         if (!iob)
2879                 return -ENOMEM;
2880         rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL);
2881         return rc;
2882 }
2883
2884 static int qeth_query_ipassists_cb(struct qeth_card *card,
2885                 struct qeth_reply *reply, unsigned long data)
2886 {
2887         struct qeth_ipa_cmd *cmd;
2888
2889         QETH_CARD_TEXT(card, 2, "qipasscb");
2890
2891         cmd = (struct qeth_ipa_cmd *) data;
2892
2893         switch (cmd->hdr.return_code) {
2894         case IPA_RC_SUCCESS:
2895                 break;
2896         case IPA_RC_NOTSUPP:
2897         case IPA_RC_L2_UNSUPPORTED_CMD:
2898                 QETH_CARD_TEXT(card, 2, "ipaunsup");
2899                 card->options.ipa4.supported_funcs |= IPA_SETADAPTERPARMS;
2900                 card->options.ipa6.supported_funcs |= IPA_SETADAPTERPARMS;
2901                 return -EOPNOTSUPP;
2902         default:
2903                 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Unhandled rc=%#x\n",
2904                                  CARD_DEVID(card), cmd->hdr.return_code);
2905                 return -EIO;
2906         }
2907
2908         if (cmd->hdr.prot_version == QETH_PROT_IPV4) {
2909                 card->options.ipa4.supported_funcs = cmd->hdr.ipa_supported;
2910                 card->options.ipa4.enabled_funcs = cmd->hdr.ipa_enabled;
2911         } else if (cmd->hdr.prot_version == QETH_PROT_IPV6) {
2912                 card->options.ipa6.supported_funcs = cmd->hdr.ipa_supported;
2913                 card->options.ipa6.enabled_funcs = cmd->hdr.ipa_enabled;
2914         } else
2915                 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Flawed LIC detected\n",
2916                                  CARD_DEVID(card));
2917         return 0;
2918 }
2919
2920 static int qeth_query_ipassists(struct qeth_card *card,
2921                                 enum qeth_prot_versions prot)
2922 {
2923         int rc;
2924         struct qeth_cmd_buffer *iob;
2925
2926         QETH_CARD_TEXT_(card, 2, "qipassi%i", prot);
2927         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_QIPASSIST, prot, 0);
2928         if (!iob)
2929                 return -ENOMEM;
2930         rc = qeth_send_ipa_cmd(card, iob, qeth_query_ipassists_cb, NULL);
2931         return rc;
2932 }
2933
2934 static int qeth_query_switch_attributes_cb(struct qeth_card *card,
2935                                 struct qeth_reply *reply, unsigned long data)
2936 {
2937         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2938         struct qeth_query_switch_attributes *attrs;
2939         struct qeth_switch_info *sw_info;
2940
2941         QETH_CARD_TEXT(card, 2, "qswiatcb");
2942         if (qeth_setadpparms_inspect_rc(cmd))
2943                 return -EIO;
2944
2945         sw_info = (struct qeth_switch_info *)reply->param;
2946         attrs = &cmd->data.setadapterparms.data.query_switch_attributes;
2947         sw_info->capabilities = attrs->capabilities;
2948         sw_info->settings = attrs->settings;
2949         QETH_CARD_TEXT_(card, 2, "%04x%04x", sw_info->capabilities,
2950                         sw_info->settings);
2951         return 0;
2952 }
2953
2954 int qeth_query_switch_attributes(struct qeth_card *card,
2955                                  struct qeth_switch_info *sw_info)
2956 {
2957         struct qeth_cmd_buffer *iob;
2958
2959         QETH_CARD_TEXT(card, 2, "qswiattr");
2960         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES))
2961                 return -EOPNOTSUPP;
2962         if (!netif_carrier_ok(card->dev))
2963                 return -ENOMEDIUM;
2964         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES, 0);
2965         if (!iob)
2966                 return -ENOMEM;
2967         return qeth_send_ipa_cmd(card, iob,
2968                                 qeth_query_switch_attributes_cb, sw_info);
2969 }
2970
2971 struct qeth_cmd_buffer *qeth_get_diag_cmd(struct qeth_card *card,
2972                                           enum qeth_diags_cmds sub_cmd,
2973                                           unsigned int data_length)
2974 {
2975         struct qeth_ipacmd_diagass *cmd;
2976         struct qeth_cmd_buffer *iob;
2977
2978         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SET_DIAG_ASS, QETH_PROT_NONE,
2979                                  DIAG_HDR_LEN + data_length);
2980         if (!iob)
2981                 return NULL;
2982
2983         cmd = &__ipa_cmd(iob)->data.diagass;
2984         cmd->subcmd_len = DIAG_SUB_HDR_LEN + data_length;
2985         cmd->subcmd = sub_cmd;
2986         return iob;
2987 }
2988 EXPORT_SYMBOL_GPL(qeth_get_diag_cmd);
2989
2990 static int qeth_query_setdiagass_cb(struct qeth_card *card,
2991                 struct qeth_reply *reply, unsigned long data)
2992 {
2993         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2994         u16 rc = cmd->hdr.return_code;
2995
2996         if (rc) {
2997                 QETH_CARD_TEXT_(card, 2, "diagq:%x", rc);
2998                 return -EIO;
2999         }
3000
3001         card->info.diagass_support = cmd->data.diagass.ext;
3002         return 0;
3003 }
3004
3005 static int qeth_query_setdiagass(struct qeth_card *card)
3006 {
3007         struct qeth_cmd_buffer *iob;
3008
3009         QETH_CARD_TEXT(card, 2, "qdiagass");
3010         iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_QUERY, 0);
3011         if (!iob)
3012                 return -ENOMEM;
3013         return qeth_send_ipa_cmd(card, iob, qeth_query_setdiagass_cb, NULL);
3014 }
3015
3016 static void qeth_get_trap_id(struct qeth_card *card, struct qeth_trap_id *tid)
3017 {
3018         unsigned long info = get_zeroed_page(GFP_KERNEL);
3019         struct sysinfo_2_2_2 *info222 = (struct sysinfo_2_2_2 *)info;
3020         struct sysinfo_3_2_2 *info322 = (struct sysinfo_3_2_2 *)info;
3021         struct ccw_dev_id ccwid;
3022         int level;
3023
3024         tid->chpid = card->info.chpid;
3025         ccw_device_get_id(CARD_RDEV(card), &ccwid);
3026         tid->ssid = ccwid.ssid;
3027         tid->devno = ccwid.devno;
3028         if (!info)
3029                 return;
3030         level = stsi(NULL, 0, 0, 0);
3031         if ((level >= 2) && (stsi(info222, 2, 2, 2) == 0))
3032                 tid->lparnr = info222->lpar_number;
3033         if ((level >= 3) && (stsi(info322, 3, 2, 2) == 0)) {
3034                 EBCASC(info322->vm[0].name, sizeof(info322->vm[0].name));
3035                 memcpy(tid->vmname, info322->vm[0].name, sizeof(tid->vmname));
3036         }
3037         free_page(info);
3038         return;
3039 }
3040
3041 static int qeth_hw_trap_cb(struct qeth_card *card,
3042                 struct qeth_reply *reply, unsigned long data)
3043 {
3044         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3045         u16 rc = cmd->hdr.return_code;
3046
3047         if (rc) {
3048                 QETH_CARD_TEXT_(card, 2, "trapc:%x", rc);
3049                 return -EIO;
3050         }
3051         return 0;
3052 }
3053
3054 int qeth_hw_trap(struct qeth_card *card, enum qeth_diags_trap_action action)
3055 {
3056         struct qeth_cmd_buffer *iob;
3057         struct qeth_ipa_cmd *cmd;
3058
3059         QETH_CARD_TEXT(card, 2, "diagtrap");
3060         iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_TRAP, 64);
3061         if (!iob)
3062                 return -ENOMEM;
3063         cmd = __ipa_cmd(iob);
3064         cmd->data.diagass.type = 1;
3065         cmd->data.diagass.action = action;
3066         switch (action) {
3067         case QETH_DIAGS_TRAP_ARM:
3068                 cmd->data.diagass.options = 0x0003;
3069                 cmd->data.diagass.ext = 0x00010000 +
3070                         sizeof(struct qeth_trap_id);
3071                 qeth_get_trap_id(card,
3072                         (struct qeth_trap_id *)cmd->data.diagass.cdata);
3073                 break;
3074         case QETH_DIAGS_TRAP_DISARM:
3075                 cmd->data.diagass.options = 0x0001;
3076                 break;
3077         case QETH_DIAGS_TRAP_CAPTURE:
3078                 break;
3079         }
3080         return qeth_send_ipa_cmd(card, iob, qeth_hw_trap_cb, NULL);
3081 }
3082 EXPORT_SYMBOL_GPL(qeth_hw_trap);
3083
3084 static int qeth_check_qdio_errors(struct qeth_card *card,
3085                                   struct qdio_buffer *buf,
3086                                   unsigned int qdio_error,
3087                                   const char *dbftext)
3088 {
3089         if (qdio_error) {
3090                 QETH_CARD_TEXT(card, 2, dbftext);
3091                 QETH_CARD_TEXT_(card, 2, " F15=%02X",
3092                                buf->element[15].sflags);
3093                 QETH_CARD_TEXT_(card, 2, " F14=%02X",
3094                                buf->element[14].sflags);
3095                 QETH_CARD_TEXT_(card, 2, " qerr=%X", qdio_error);
3096                 if ((buf->element[15].sflags) == 0x12) {
3097                         QETH_CARD_STAT_INC(card, rx_fifo_errors);
3098                         return 0;
3099                 } else
3100                         return 1;
3101         }
3102         return 0;
3103 }
3104
3105 static void qeth_queue_input_buffer(struct qeth_card *card, int index)
3106 {
3107         struct qeth_qdio_q *queue = card->qdio.in_q;
3108         struct list_head *lh;
3109         int count;
3110         int i;
3111         int rc;
3112         int newcount = 0;
3113
3114         count = (index < queue->next_buf_to_init)?
3115                 card->qdio.in_buf_pool.buf_count -
3116                 (queue->next_buf_to_init - index) :
3117                 card->qdio.in_buf_pool.buf_count -
3118                 (queue->next_buf_to_init + QDIO_MAX_BUFFERS_PER_Q - index);
3119         /* only requeue at a certain threshold to avoid SIGAs */
3120         if (count >= QETH_IN_BUF_REQUEUE_THRESHOLD(card)) {
3121                 for (i = queue->next_buf_to_init;
3122                      i < queue->next_buf_to_init + count; ++i) {
3123                         if (qeth_init_input_buffer(card,
3124                                 &queue->bufs[QDIO_BUFNR(i)])) {
3125                                 break;
3126                         } else {
3127                                 newcount++;
3128                         }
3129                 }
3130
3131                 if (newcount < count) {
3132                         /* we are in memory shortage so we switch back to
3133                            traditional skb allocation and drop packages */
3134                         atomic_set(&card->force_alloc_skb, 3);
3135                         count = newcount;
3136                 } else {
3137                         atomic_add_unless(&card->force_alloc_skb, -1, 0);
3138                 }
3139
3140                 if (!count) {
3141                         i = 0;
3142                         list_for_each(lh, &card->qdio.in_buf_pool.entry_list)
3143                                 i++;
3144                         if (i == card->qdio.in_buf_pool.buf_count) {
3145                                 QETH_CARD_TEXT(card, 2, "qsarbw");
3146                                 card->reclaim_index = index;
3147                                 schedule_delayed_work(
3148                                         &card->buffer_reclaim_work,
3149                                         QETH_RECLAIM_WORK_TIME);
3150                         }
3151                         return;
3152                 }
3153
3154                 /*
3155                  * according to old code it should be avoided to requeue all
3156                  * 128 buffers in order to benefit from PCI avoidance.
3157                  * this function keeps at least one buffer (the buffer at
3158                  * 'index') un-requeued -> this buffer is the first buffer that
3159                  * will be requeued the next time
3160                  */
3161                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0,
3162                              queue->next_buf_to_init, count);
3163                 if (rc) {
3164                         QETH_CARD_TEXT(card, 2, "qinberr");
3165                 }
3166                 queue->next_buf_to_init = QDIO_BUFNR(queue->next_buf_to_init +
3167                                                      count);
3168         }
3169 }
3170
3171 static void qeth_buffer_reclaim_work(struct work_struct *work)
3172 {
3173         struct qeth_card *card = container_of(work, struct qeth_card,
3174                 buffer_reclaim_work.work);
3175
3176         QETH_CARD_TEXT_(card, 2, "brw:%x", card->reclaim_index);
3177         qeth_queue_input_buffer(card, card->reclaim_index);
3178 }
3179
3180 static void qeth_handle_send_error(struct qeth_card *card,
3181                 struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err)
3182 {
3183         int sbalf15 = buffer->buffer->element[15].sflags;
3184
3185         QETH_CARD_TEXT(card, 6, "hdsnderr");
3186         qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr");
3187
3188         if (!qdio_err)
3189                 return;
3190
3191         if ((sbalf15 >= 15) && (sbalf15 <= 31))
3192                 return;
3193
3194         QETH_CARD_TEXT(card, 1, "lnkfail");
3195         QETH_CARD_TEXT_(card, 1, "%04x %02x",
3196                        (u16)qdio_err, (u8)sbalf15);
3197 }
3198
3199 /**
3200  * qeth_prep_flush_pack_buffer - Prepares flushing of a packing buffer.
3201  * @queue: queue to check for packing buffer
3202  *
3203  * Returns number of buffers that were prepared for flush.
3204  */
3205 static int qeth_prep_flush_pack_buffer(struct qeth_qdio_out_q *queue)
3206 {
3207         struct qeth_qdio_out_buffer *buffer;
3208
3209         buffer = queue->bufs[queue->next_buf_to_fill];
3210         if ((atomic_read(&buffer->state) == QETH_QDIO_BUF_EMPTY) &&
3211             (buffer->next_element_to_fill > 0)) {
3212                 /* it's a packing buffer */
3213                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3214                 queue->next_buf_to_fill =
3215                         QDIO_BUFNR(queue->next_buf_to_fill + 1);
3216                 return 1;
3217         }
3218         return 0;
3219 }
3220
3221 /*
3222  * Switched to packing state if the number of used buffers on a queue
3223  * reaches a certain limit.
3224  */
3225 static void qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q *queue)
3226 {
3227         if (!queue->do_pack) {
3228                 if (atomic_read(&queue->used_buffers)
3229                     >= QETH_HIGH_WATERMARK_PACK){
3230                         /* switch non-PACKING -> PACKING */
3231                         QETH_CARD_TEXT(queue->card, 6, "np->pack");
3232                         QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3233                         queue->do_pack = 1;
3234                 }
3235         }
3236 }
3237
3238 /*
3239  * Switches from packing to non-packing mode. If there is a packing
3240  * buffer on the queue this buffer will be prepared to be flushed.
3241  * In that case 1 is returned to inform the caller. If no buffer
3242  * has to be flushed, zero is returned.
3243  */
3244 static int qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q *queue)
3245 {
3246         if (queue->do_pack) {
3247                 if (atomic_read(&queue->used_buffers)
3248                     <= QETH_LOW_WATERMARK_PACK) {
3249                         /* switch PACKING -> non-PACKING */
3250                         QETH_CARD_TEXT(queue->card, 6, "pack->np");
3251                         QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3252                         queue->do_pack = 0;
3253                         return qeth_prep_flush_pack_buffer(queue);
3254                 }
3255         }
3256         return 0;
3257 }
3258
3259 static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
3260                                int count)
3261 {
3262         struct qeth_card *card = queue->card;
3263         struct qeth_qdio_out_buffer *buf;
3264         int rc;
3265         int i;
3266         unsigned int qdio_flags;
3267
3268         for (i = index; i < index + count; ++i) {
3269                 unsigned int bidx = QDIO_BUFNR(i);
3270
3271                 buf = queue->bufs[bidx];
3272                 buf->buffer->element[buf->next_element_to_fill - 1].eflags |=
3273                                 SBAL_EFLAGS_LAST_ENTRY;
3274
3275                 if (queue->bufstates)
3276                         queue->bufstates[bidx].user = buf;
3277
3278                 if (IS_IQD(queue->card))
3279                         continue;
3280
3281                 if (!queue->do_pack) {
3282                         if ((atomic_read(&queue->used_buffers) >=
3283                                 (QETH_HIGH_WATERMARK_PACK -
3284                                  QETH_WATERMARK_PACK_FUZZ)) &&
3285                             !atomic_read(&queue->set_pci_flags_count)) {
3286                                 /* it's likely that we'll go to packing
3287                                  * mode soon */
3288                                 atomic_inc(&queue->set_pci_flags_count);
3289                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3290                         }
3291                 } else {
3292                         if (!atomic_read(&queue->set_pci_flags_count)) {
3293                                 /*
3294                                  * there's no outstanding PCI any more, so we
3295                                  * have to request a PCI to be sure the the PCI
3296                                  * will wake at some time in the future then we
3297                                  * can flush packed buffers that might still be
3298                                  * hanging around, which can happen if no
3299                                  * further send was requested by the stack
3300                                  */
3301                                 atomic_inc(&queue->set_pci_flags_count);
3302                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3303                         }
3304                 }
3305         }
3306
3307         qdio_flags = QDIO_FLAG_SYNC_OUTPUT;
3308         if (atomic_read(&queue->set_pci_flags_count))
3309                 qdio_flags |= QDIO_FLAG_PCI_OUT;
3310         rc = do_QDIO(CARD_DDEV(queue->card), qdio_flags,
3311                      queue->queue_no, index, count);
3312
3313         /* Fake the TX completion interrupt: */
3314         if (IS_IQD(card))
3315                 napi_schedule(&queue->napi);
3316
3317         if (rc) {
3318                 /* ignore temporary SIGA errors without busy condition */
3319                 if (rc == -ENOBUFS)
3320                         return;
3321                 QETH_CARD_TEXT(queue->card, 2, "flushbuf");
3322                 QETH_CARD_TEXT_(queue->card, 2, " q%d", queue->queue_no);
3323                 QETH_CARD_TEXT_(queue->card, 2, " idx%d", index);
3324                 QETH_CARD_TEXT_(queue->card, 2, " c%d", count);
3325                 QETH_CARD_TEXT_(queue->card, 2, " err%d", rc);
3326
3327                 /* this must not happen under normal circumstances. if it
3328                  * happens something is really wrong -> recover */
3329                 qeth_schedule_recovery(queue->card);
3330                 return;
3331         }
3332 }
3333
3334 static void qeth_flush_queue(struct qeth_qdio_out_q *queue)
3335 {
3336         qeth_flush_buffers(queue, queue->bulk_start, queue->bulk_count);
3337
3338         queue->bulk_start = QDIO_BUFNR(queue->bulk_start + queue->bulk_count);
3339         queue->prev_hdr = NULL;
3340         queue->bulk_count = 0;
3341 }
3342
3343 static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue)
3344 {
3345         int index;
3346         int flush_cnt = 0;
3347         int q_was_packing = 0;
3348
3349         /*
3350          * check if weed have to switch to non-packing mode or if
3351          * we have to get a pci flag out on the queue
3352          */
3353         if ((atomic_read(&queue->used_buffers) <= QETH_LOW_WATERMARK_PACK) ||
3354             !atomic_read(&queue->set_pci_flags_count)) {
3355                 if (atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH) ==
3356                                 QETH_OUT_Q_UNLOCKED) {
3357                         /*
3358                          * If we get in here, there was no action in
3359                          * do_send_packet. So, we check if there is a
3360                          * packing buffer to be flushed here.
3361                          */
3362                         index = queue->next_buf_to_fill;
3363                         q_was_packing = queue->do_pack;
3364                         /* queue->do_pack may change */
3365                         barrier();
3366                         flush_cnt += qeth_switch_to_nonpacking_if_needed(queue);
3367                         if (!flush_cnt &&
3368                             !atomic_read(&queue->set_pci_flags_count))
3369                                 flush_cnt += qeth_prep_flush_pack_buffer(queue);
3370                         if (q_was_packing)
3371                                 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_cnt);
3372                         if (flush_cnt)
3373                                 qeth_flush_buffers(queue, index, flush_cnt);
3374                         atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
3375                 }
3376         }
3377 }
3378
3379 static void qeth_qdio_start_poll(struct ccw_device *ccwdev, int queue,
3380                                  unsigned long card_ptr)
3381 {
3382         struct qeth_card *card = (struct qeth_card *)card_ptr;
3383
3384         if (card->dev->flags & IFF_UP)
3385                 napi_schedule(&card->napi);
3386 }
3387
3388 int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq)
3389 {
3390         int rc;
3391
3392         if (card->options.cq ==  QETH_CQ_NOTAVAILABLE) {
3393                 rc = -1;
3394                 goto out;
3395         } else {
3396                 if (card->options.cq == cq) {
3397                         rc = 0;
3398                         goto out;
3399                 }
3400
3401                 if (card->state != CARD_STATE_DOWN) {
3402                         rc = -1;
3403                         goto out;
3404                 }
3405
3406                 qeth_free_qdio_queues(card);
3407                 card->options.cq = cq;
3408                 rc = 0;
3409         }
3410 out:
3411         return rc;
3412
3413 }
3414 EXPORT_SYMBOL_GPL(qeth_configure_cq);
3415
3416 static void qeth_qdio_cq_handler(struct qeth_card *card, unsigned int qdio_err,
3417                                  unsigned int queue, int first_element,
3418                                  int count)
3419 {
3420         struct qeth_qdio_q *cq = card->qdio.c_q;
3421         int i;
3422         int rc;
3423
3424         if (!qeth_is_cq(card, queue))
3425                 return;
3426
3427         QETH_CARD_TEXT_(card, 5, "qcqhe%d", first_element);
3428         QETH_CARD_TEXT_(card, 5, "qcqhc%d", count);
3429         QETH_CARD_TEXT_(card, 5, "qcqherr%d", qdio_err);
3430
3431         if (qdio_err) {
3432                 netif_tx_stop_all_queues(card->dev);
3433                 qeth_schedule_recovery(card);
3434                 return;
3435         }
3436
3437         for (i = first_element; i < first_element + count; ++i) {
3438                 struct qdio_buffer *buffer = cq->qdio_bufs[QDIO_BUFNR(i)];
3439                 int e = 0;
3440
3441                 while ((e < QDIO_MAX_ELEMENTS_PER_BUFFER) &&
3442                        buffer->element[e].addr) {
3443                         unsigned long phys_aob_addr;
3444
3445                         phys_aob_addr = (unsigned long) buffer->element[e].addr;
3446                         qeth_qdio_handle_aob(card, phys_aob_addr);
3447                         ++e;
3448                 }
3449                 qeth_scrub_qdio_buffer(buffer, QDIO_MAX_ELEMENTS_PER_BUFFER);
3450         }
3451         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, queue,
3452                     card->qdio.c_q->next_buf_to_init,
3453                     count);
3454         if (rc) {
3455                 dev_warn(&card->gdev->dev,
3456                         "QDIO reported an error, rc=%i\n", rc);
3457                 QETH_CARD_TEXT(card, 2, "qcqherr");
3458         }
3459
3460         cq->next_buf_to_init = QDIO_BUFNR(cq->next_buf_to_init + count);
3461 }
3462
3463 static void qeth_qdio_input_handler(struct ccw_device *ccwdev,
3464                                     unsigned int qdio_err, int queue,
3465                                     int first_elem, int count,
3466                                     unsigned long card_ptr)
3467 {
3468         struct qeth_card *card = (struct qeth_card *)card_ptr;
3469
3470         QETH_CARD_TEXT_(card, 2, "qihq%d", queue);
3471         QETH_CARD_TEXT_(card, 2, "qiec%d", qdio_err);
3472
3473         if (qeth_is_cq(card, queue))
3474                 qeth_qdio_cq_handler(card, qdio_err, queue, first_elem, count);
3475         else if (qdio_err)
3476                 qeth_schedule_recovery(card);
3477 }
3478
3479 static void qeth_qdio_output_handler(struct ccw_device *ccwdev,
3480                                      unsigned int qdio_error, int __queue,
3481                                      int first_element, int count,
3482                                      unsigned long card_ptr)
3483 {
3484         struct qeth_card *card        = (struct qeth_card *) card_ptr;
3485         struct qeth_qdio_out_q *queue = card->qdio.out_qs[__queue];
3486         struct net_device *dev = card->dev;
3487         struct netdev_queue *txq;
3488         int i;
3489
3490         QETH_CARD_TEXT(card, 6, "qdouhdl");
3491         if (qdio_error & QDIO_ERROR_FATAL) {
3492                 QETH_CARD_TEXT(card, 2, "achkcond");
3493                 netif_tx_stop_all_queues(dev);
3494                 qeth_schedule_recovery(card);
3495                 return;
3496         }
3497
3498         for (i = first_element; i < (first_element + count); ++i) {
3499                 struct qeth_qdio_out_buffer *buf = queue->bufs[QDIO_BUFNR(i)];
3500
3501                 qeth_handle_send_error(card, buf, qdio_error);
3502                 qeth_clear_output_buffer(queue, buf, qdio_error, 0);
3503         }
3504
3505         atomic_sub(count, &queue->used_buffers);
3506         qeth_check_outbound_queue(queue);
3507
3508         txq = netdev_get_tx_queue(dev, __queue);
3509         /* xmit may have observed the full-condition, but not yet stopped the
3510          * txq. In which case the code below won't trigger. So before returning,
3511          * xmit will re-check the txq's fill level and wake it up if needed.
3512          */
3513         if (netif_tx_queue_stopped(txq) && !qeth_out_queue_is_full(queue))
3514                 netif_tx_wake_queue(txq);
3515 }
3516
3517 /**
3518  * Note: Function assumes that we have 4 outbound queues.
3519  */
3520 int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb)
3521 {
3522         struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
3523         u8 tos;
3524
3525         switch (card->qdio.do_prio_queueing) {
3526         case QETH_PRIO_Q_ING_TOS:
3527         case QETH_PRIO_Q_ING_PREC:
3528                 switch (qeth_get_ip_version(skb)) {
3529                 case 4:
3530                         tos = ipv4_get_dsfield(ip_hdr(skb));
3531                         break;
3532                 case 6:
3533                         tos = ipv6_get_dsfield(ipv6_hdr(skb));
3534                         break;
3535                 default:
3536                         return card->qdio.default_out_queue;
3537                 }
3538                 if (card->qdio.do_prio_queueing == QETH_PRIO_Q_ING_PREC)
3539                         return ~tos >> 6 & 3;
3540                 if (tos & IPTOS_MINCOST)
3541                         return 3;
3542                 if (tos & IPTOS_RELIABILITY)
3543                         return 2;
3544                 if (tos & IPTOS_THROUGHPUT)
3545                         return 1;
3546                 if (tos & IPTOS_LOWDELAY)
3547                         return 0;
3548                 break;
3549         case QETH_PRIO_Q_ING_SKB:
3550                 if (skb->priority > 5)
3551                         return 0;
3552                 return ~skb->priority >> 1 & 3;
3553         case QETH_PRIO_Q_ING_VLAN:
3554                 if (veth->h_vlan_proto == htons(ETH_P_8021Q))
3555                         return ~ntohs(veth->h_vlan_TCI) >>
3556                                (VLAN_PRIO_SHIFT + 1) & 3;
3557                 break;
3558         default:
3559                 break;
3560         }
3561         return card->qdio.default_out_queue;
3562 }
3563 EXPORT_SYMBOL_GPL(qeth_get_priority_queue);
3564
3565 /**
3566  * qeth_get_elements_for_frags() -      find number of SBALEs for skb frags.
3567  * @skb:                                SKB address
3568  *
3569  * Returns the number of pages, and thus QDIO buffer elements, needed to cover
3570  * fragmented part of the SKB. Returns zero for linear SKB.
3571  */
3572 static int qeth_get_elements_for_frags(struct sk_buff *skb)
3573 {
3574         int cnt, elements = 0;
3575
3576         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3577                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
3578
3579                 elements += qeth_get_elements_for_range(
3580                         (addr_t)skb_frag_address(frag),
3581                         (addr_t)skb_frag_address(frag) + skb_frag_size(frag));
3582         }
3583         return elements;
3584 }
3585
3586 /**
3587  * qeth_count_elements() -      Counts the number of QDIO buffer elements needed
3588  *                              to transmit an skb.
3589  * @skb:                        the skb to operate on.
3590  * @data_offset:                skip this part of the skb's linear data
3591  *
3592  * Returns the number of pages, and thus QDIO buffer elements, needed to map the
3593  * skb's data (both its linear part and paged fragments).
3594  */
3595 unsigned int qeth_count_elements(struct sk_buff *skb, unsigned int data_offset)
3596 {
3597         unsigned int elements = qeth_get_elements_for_frags(skb);
3598         addr_t end = (addr_t)skb->data + skb_headlen(skb);
3599         addr_t start = (addr_t)skb->data + data_offset;
3600
3601         if (start != end)
3602                 elements += qeth_get_elements_for_range(start, end);
3603         return elements;
3604 }
3605 EXPORT_SYMBOL_GPL(qeth_count_elements);
3606
3607 #define QETH_HDR_CACHE_OBJ_SIZE         (sizeof(struct qeth_hdr_tso) + \
3608                                          MAX_TCP_HEADER)
3609
3610 /**
3611  * qeth_add_hw_header() - add a HW header to an skb.
3612  * @skb: skb that the HW header should be added to.
3613  * @hdr: double pointer to a qeth_hdr. When returning with >= 0,
3614  *       it contains a valid pointer to a qeth_hdr.
3615  * @hdr_len: length of the HW header.
3616  * @proto_len: length of protocol headers that need to be in same page as the
3617  *             HW header.
3618  *
3619  * Returns the pushed length. If the header can't be pushed on
3620  * (eg. because it would cross a page boundary), it is allocated from
3621  * the cache instead and 0 is returned.
3622  * The number of needed buffer elements is returned in @elements.
3623  * Error to create the hdr is indicated by returning with < 0.
3624  */
3625 static int qeth_add_hw_header(struct qeth_qdio_out_q *queue,
3626                               struct sk_buff *skb, struct qeth_hdr **hdr,
3627                               unsigned int hdr_len, unsigned int proto_len,
3628                               unsigned int *elements)
3629 {
3630         const unsigned int contiguous = proto_len ? proto_len : 1;
3631         const unsigned int max_elements = queue->max_elements;
3632         unsigned int __elements;
3633         addr_t start, end;
3634         bool push_ok;
3635         int rc;
3636
3637 check_layout:
3638         start = (addr_t)skb->data - hdr_len;
3639         end = (addr_t)skb->data;
3640
3641         if (qeth_get_elements_for_range(start, end + contiguous) == 1) {
3642                 /* Push HW header into same page as first protocol header. */
3643                 push_ok = true;
3644                 /* ... but TSO always needs a separate element for headers: */
3645                 if (skb_is_gso(skb))
3646                         __elements = 1 + qeth_count_elements(skb, proto_len);
3647                 else
3648                         __elements = qeth_count_elements(skb, 0);
3649         } else if (!proto_len && PAGE_ALIGNED(skb->data)) {
3650                 /* Push HW header into preceding page, flush with skb->data. */
3651                 push_ok = true;
3652                 __elements = 1 + qeth_count_elements(skb, 0);
3653         } else {
3654                 /* Use header cache, copy protocol headers up. */
3655                 push_ok = false;
3656                 __elements = 1 + qeth_count_elements(skb, proto_len);
3657         }
3658
3659         /* Compress skb to fit into one IO buffer: */
3660         if (__elements > max_elements) {
3661                 if (!skb_is_nonlinear(skb)) {
3662                         /* Drop it, no easy way of shrinking it further. */
3663                         QETH_DBF_MESSAGE(2, "Dropped an oversized skb (Max Elements=%u / Actual=%u / Length=%u).\n",
3664                                          max_elements, __elements, skb->len);
3665                         return -E2BIG;
3666                 }
3667
3668                 rc = skb_linearize(skb);
3669                 if (rc) {
3670                         QETH_TXQ_STAT_INC(queue, skbs_linearized_fail);
3671                         return rc;
3672                 }
3673
3674                 QETH_TXQ_STAT_INC(queue, skbs_linearized);
3675                 /* Linearization changed the layout, re-evaluate: */
3676                 goto check_layout;
3677         }
3678
3679         *elements = __elements;
3680         /* Add the header: */
3681         if (push_ok) {
3682                 *hdr = skb_push(skb, hdr_len);
3683                 return hdr_len;
3684         }
3685         /* fall back */
3686         if (hdr_len + proto_len > QETH_HDR_CACHE_OBJ_SIZE)
3687                 return -E2BIG;
3688         *hdr = kmem_cache_alloc(qeth_core_header_cache, GFP_ATOMIC);
3689         if (!*hdr)
3690                 return -ENOMEM;
3691         /* Copy protocol headers behind HW header: */
3692         skb_copy_from_linear_data(skb, ((char *)*hdr) + hdr_len, proto_len);
3693         return 0;
3694 }
3695
3696 static bool qeth_iqd_may_bulk(struct qeth_qdio_out_q *queue,
3697                               struct sk_buff *curr_skb,
3698                               struct qeth_hdr *curr_hdr)
3699 {
3700         struct qeth_qdio_out_buffer *buffer = queue->bufs[queue->bulk_start];
3701         struct qeth_hdr *prev_hdr = queue->prev_hdr;
3702
3703         if (!prev_hdr)
3704                 return true;
3705
3706         /* All packets must have the same target: */
3707         if (curr_hdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER2) {
3708                 struct sk_buff *prev_skb = skb_peek(&buffer->skb_list);
3709
3710                 return ether_addr_equal(eth_hdr(prev_skb)->h_dest,
3711                                         eth_hdr(curr_skb)->h_dest) &&
3712                        qeth_l2_same_vlan(&prev_hdr->hdr.l2, &curr_hdr->hdr.l2);
3713         }
3714
3715         return qeth_l3_same_next_hop(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3) &&
3716                qeth_l3_iqd_same_vlan(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3);
3717 }
3718
3719 static unsigned int __qeth_fill_buffer(struct sk_buff *skb,
3720                                        struct qeth_qdio_out_buffer *buf,
3721                                        bool is_first_elem, unsigned int offset)
3722 {
3723         struct qdio_buffer *buffer = buf->buffer;
3724         int element = buf->next_element_to_fill;
3725         int length = skb_headlen(skb) - offset;
3726         char *data = skb->data + offset;
3727         unsigned int elem_length, cnt;
3728
3729         /* map linear part into buffer element(s) */
3730         while (length > 0) {
3731                 elem_length = min_t(unsigned int, length,
3732                                     PAGE_SIZE - offset_in_page(data));
3733
3734                 buffer->element[element].addr = data;
3735                 buffer->element[element].length = elem_length;
3736                 length -= elem_length;
3737                 if (is_first_elem) {
3738                         is_first_elem = false;
3739                         if (length || skb_is_nonlinear(skb))
3740                                 /* skb needs additional elements */
3741                                 buffer->element[element].eflags =
3742                                         SBAL_EFLAGS_FIRST_FRAG;
3743                         else
3744                                 buffer->element[element].eflags = 0;
3745                 } else {
3746                         buffer->element[element].eflags =
3747                                 SBAL_EFLAGS_MIDDLE_FRAG;
3748                 }
3749
3750                 data += elem_length;
3751                 element++;
3752         }
3753
3754         /* map page frags into buffer element(s) */
3755         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3756                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
3757
3758                 data = skb_frag_address(frag);
3759                 length = skb_frag_size(frag);
3760                 while (length > 0) {
3761                         elem_length = min_t(unsigned int, length,
3762                                             PAGE_SIZE - offset_in_page(data));
3763
3764                         buffer->element[element].addr = data;
3765                         buffer->element[element].length = elem_length;
3766                         buffer->element[element].eflags =
3767                                 SBAL_EFLAGS_MIDDLE_FRAG;
3768
3769                         length -= elem_length;
3770                         data += elem_length;
3771                         element++;
3772                 }
3773         }
3774
3775         if (buffer->element[element - 1].eflags)
3776                 buffer->element[element - 1].eflags = SBAL_EFLAGS_LAST_FRAG;
3777         buf->next_element_to_fill = element;
3778         return element;
3779 }
3780
3781 /**
3782  * qeth_fill_buffer() - map skb into an output buffer
3783  * @buf:        buffer to transport the skb
3784  * @skb:        skb to map into the buffer
3785  * @hdr:        qeth_hdr for this skb. Either at skb->data, or allocated
3786  *              from qeth_core_header_cache.
3787  * @offset:     when mapping the skb, start at skb->data + offset
3788  * @hd_len:     if > 0, build a dedicated header element of this size
3789  */
3790 static unsigned int qeth_fill_buffer(struct qeth_qdio_out_buffer *buf,
3791                                      struct sk_buff *skb, struct qeth_hdr *hdr,
3792                                      unsigned int offset, unsigned int hd_len)
3793 {
3794         struct qdio_buffer *buffer = buf->buffer;
3795         bool is_first_elem = true;
3796
3797         __skb_queue_tail(&buf->skb_list, skb);
3798
3799         /* build dedicated header element */
3800         if (hd_len) {
3801                 int element = buf->next_element_to_fill;
3802                 is_first_elem = false;
3803
3804                 buffer->element[element].addr = hdr;
3805                 buffer->element[element].length = hd_len;
3806                 buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
3807                 /* remember to free cache-allocated qeth_hdr: */
3808                 buf->is_header[element] = ((void *)hdr != skb->data);
3809                 buf->next_element_to_fill++;
3810         }
3811
3812         return __qeth_fill_buffer(skb, buf, is_first_elem, offset);
3813 }
3814
3815 static int __qeth_xmit(struct qeth_card *card, struct qeth_qdio_out_q *queue,
3816                        struct sk_buff *skb, unsigned int elements,
3817                        struct qeth_hdr *hdr, unsigned int offset,
3818                        unsigned int hd_len)
3819 {
3820         unsigned int bytes = qdisc_pkt_len(skb);
3821         struct qeth_qdio_out_buffer *buffer;
3822         unsigned int next_element;
3823         struct netdev_queue *txq;
3824         bool stopped = false;
3825         bool flush;
3826
3827         buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start + queue->bulk_count)];
3828         txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
3829
3830         /* Just a sanity check, the wake/stop logic should ensure that we always
3831          * get a free buffer.
3832          */
3833         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
3834                 return -EBUSY;
3835
3836         flush = !qeth_iqd_may_bulk(queue, skb, hdr);
3837
3838         if (flush ||
3839             (buffer->next_element_to_fill + elements > queue->max_elements)) {
3840                 if (buffer->next_element_to_fill > 0) {
3841                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3842                         queue->bulk_count++;
3843                 }
3844
3845                 if (queue->bulk_count >= queue->bulk_max)
3846                         flush = true;
3847
3848                 if (flush)
3849                         qeth_flush_queue(queue);
3850
3851                 buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start +
3852                                                 queue->bulk_count)];
3853
3854                 /* Sanity-check again: */
3855                 if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
3856                         return -EBUSY;
3857         }
3858
3859         if (buffer->next_element_to_fill == 0 &&
3860             atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
3861                 /* If a TX completion happens right _here_ and misses to wake
3862                  * the txq, then our re-check below will catch the race.
3863                  */
3864                 QETH_TXQ_STAT_INC(queue, stopped);
3865                 netif_tx_stop_queue(txq);
3866                 stopped = true;
3867         }
3868
3869         next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
3870         buffer->bytes += bytes;
3871         queue->prev_hdr = hdr;
3872
3873         flush = __netdev_tx_sent_queue(txq, bytes,
3874                                        !stopped && netdev_xmit_more());
3875
3876         if (flush || next_element >= queue->max_elements) {
3877                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3878                 queue->bulk_count++;
3879
3880                 if (queue->bulk_count >= queue->bulk_max)
3881                         flush = true;
3882
3883                 if (flush)
3884                         qeth_flush_queue(queue);
3885         }
3886
3887         if (stopped && !qeth_out_queue_is_full(queue))
3888                 netif_tx_start_queue(txq);
3889         return 0;
3890 }
3891
3892 int qeth_do_send_packet(struct qeth_card *card, struct qeth_qdio_out_q *queue,
3893                         struct sk_buff *skb, struct qeth_hdr *hdr,
3894                         unsigned int offset, unsigned int hd_len,
3895                         int elements_needed)
3896 {
3897         struct qeth_qdio_out_buffer *buffer;
3898         unsigned int next_element;
3899         struct netdev_queue *txq;
3900         bool stopped = false;
3901         int start_index;
3902         int flush_count = 0;
3903         int do_pack = 0;
3904         int tmp;
3905         int rc = 0;
3906
3907         /* spin until we get the queue ... */
3908         while (atomic_cmpxchg(&queue->state, QETH_OUT_Q_UNLOCKED,
3909                               QETH_OUT_Q_LOCKED) != QETH_OUT_Q_UNLOCKED);
3910         start_index = queue->next_buf_to_fill;
3911         buffer = queue->bufs[queue->next_buf_to_fill];
3912
3913         /* Just a sanity check, the wake/stop logic should ensure that we always
3914          * get a free buffer.
3915          */
3916         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY) {
3917                 atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
3918                 return -EBUSY;
3919         }
3920
3921         txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
3922
3923         /* check if we need to switch packing state of this queue */
3924         qeth_switch_to_packing_if_needed(queue);
3925         if (queue->do_pack) {
3926                 do_pack = 1;
3927                 /* does packet fit in current buffer? */
3928                 if (buffer->next_element_to_fill + elements_needed >
3929                     queue->max_elements) {
3930                         /* ... no -> set state PRIMED */
3931                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3932                         flush_count++;
3933                         queue->next_buf_to_fill =
3934                                 QDIO_BUFNR(queue->next_buf_to_fill + 1);
3935                         buffer = queue->bufs[queue->next_buf_to_fill];
3936
3937                         /* We stepped forward, so sanity-check again: */
3938                         if (atomic_read(&buffer->state) !=
3939                             QETH_QDIO_BUF_EMPTY) {
3940                                 qeth_flush_buffers(queue, start_index,
3941                                                            flush_count);
3942                                 atomic_set(&queue->state,
3943                                                 QETH_OUT_Q_UNLOCKED);
3944                                 rc = -EBUSY;
3945                                 goto out;
3946                         }
3947                 }
3948         }
3949
3950         if (buffer->next_element_to_fill == 0 &&
3951             atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
3952                 /* If a TX completion happens right _here_ and misses to wake
3953                  * the txq, then our re-check below will catch the race.
3954                  */
3955                 QETH_TXQ_STAT_INC(queue, stopped);
3956                 netif_tx_stop_queue(txq);
3957                 stopped = true;
3958         }
3959
3960         next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
3961
3962         if (queue->do_pack)
3963                 QETH_TXQ_STAT_INC(queue, skbs_pack);
3964         if (!queue->do_pack || stopped || next_element >= queue->max_elements) {
3965                 flush_count++;
3966                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3967                 queue->next_buf_to_fill =
3968                                 QDIO_BUFNR(queue->next_buf_to_fill + 1);
3969         }
3970
3971         if (flush_count)
3972                 qeth_flush_buffers(queue, start_index, flush_count);
3973         else if (!atomic_read(&queue->set_pci_flags_count))
3974                 atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH);
3975         /*
3976          * queue->state will go from LOCKED -> UNLOCKED or from
3977          * LOCKED_FLUSH -> LOCKED if output_handler wanted to 'notify' us
3978          * (switch packing state or flush buffer to get another pci flag out).
3979          * In that case we will enter this loop
3980          */
3981         while (atomic_dec_return(&queue->state)) {
3982                 start_index = queue->next_buf_to_fill;
3983                 /* check if we can go back to non-packing state */
3984                 tmp = qeth_switch_to_nonpacking_if_needed(queue);
3985                 /*
3986                  * check if we need to flush a packing buffer to get a pci
3987                  * flag out on the queue
3988                  */
3989                 if (!tmp && !atomic_read(&queue->set_pci_flags_count))
3990                         tmp = qeth_prep_flush_pack_buffer(queue);
3991                 if (tmp) {
3992                         qeth_flush_buffers(queue, start_index, tmp);
3993                         flush_count += tmp;
3994                 }
3995         }
3996 out:
3997         /* at this point the queue is UNLOCKED again */
3998         if (do_pack)
3999                 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_count);
4000
4001         if (stopped && !qeth_out_queue_is_full(queue))
4002                 netif_tx_start_queue(txq);
4003         return rc;
4004 }
4005 EXPORT_SYMBOL_GPL(qeth_do_send_packet);
4006
4007 static void qeth_fill_tso_ext(struct qeth_hdr_tso *hdr,
4008                               unsigned int payload_len, struct sk_buff *skb,
4009                               unsigned int proto_len)
4010 {
4011         struct qeth_hdr_ext_tso *ext = &hdr->ext;
4012
4013         ext->hdr_tot_len = sizeof(*ext);
4014         ext->imb_hdr_no = 1;
4015         ext->hdr_type = 1;
4016         ext->hdr_version = 1;
4017         ext->hdr_len = 28;
4018         ext->payload_len = payload_len;
4019         ext->mss = skb_shinfo(skb)->gso_size;
4020         ext->dg_hdr_len = proto_len;
4021 }
4022
4023 int qeth_xmit(struct qeth_card *card, struct sk_buff *skb,
4024               struct qeth_qdio_out_q *queue, int ipv,
4025               void (*fill_header)(struct qeth_qdio_out_q *queue,
4026                                   struct qeth_hdr *hdr, struct sk_buff *skb,
4027                                   int ipv, unsigned int data_len))
4028 {
4029         unsigned int proto_len, hw_hdr_len;
4030         unsigned int frame_len = skb->len;
4031         bool is_tso = skb_is_gso(skb);
4032         unsigned int data_offset = 0;
4033         struct qeth_hdr *hdr = NULL;
4034         unsigned int hd_len = 0;
4035         unsigned int elements;
4036         int push_len, rc;
4037
4038         if (is_tso) {
4039                 hw_hdr_len = sizeof(struct qeth_hdr_tso);
4040                 proto_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
4041         } else {
4042                 hw_hdr_len = sizeof(struct qeth_hdr);
4043                 proto_len = (IS_IQD(card) && IS_LAYER2(card)) ? ETH_HLEN : 0;
4044         }
4045
4046         rc = skb_cow_head(skb, hw_hdr_len);
4047         if (rc)
4048                 return rc;
4049
4050         push_len = qeth_add_hw_header(queue, skb, &hdr, hw_hdr_len, proto_len,
4051                                       &elements);
4052         if (push_len < 0)
4053                 return push_len;
4054         if (is_tso || !push_len) {
4055                 /* HW header needs its own buffer element. */
4056                 hd_len = hw_hdr_len + proto_len;
4057                 data_offset = push_len + proto_len;
4058         }
4059         memset(hdr, 0, hw_hdr_len);
4060         fill_header(queue, hdr, skb, ipv, frame_len);
4061         if (is_tso)
4062                 qeth_fill_tso_ext((struct qeth_hdr_tso *) hdr,
4063                                   frame_len - proto_len, skb, proto_len);
4064
4065         if (IS_IQD(card)) {
4066                 rc = __qeth_xmit(card, queue, skb, elements, hdr, data_offset,
4067                                  hd_len);
4068         } else {
4069                 /* TODO: drop skb_orphan() once TX completion is fast enough */
4070                 skb_orphan(skb);
4071                 rc = qeth_do_send_packet(card, queue, skb, hdr, data_offset,
4072                                          hd_len, elements);
4073         }
4074
4075         if (rc && !push_len)
4076                 kmem_cache_free(qeth_core_header_cache, hdr);
4077
4078         return rc;
4079 }
4080 EXPORT_SYMBOL_GPL(qeth_xmit);
4081
4082 static int qeth_setadp_promisc_mode_cb(struct qeth_card *card,
4083                 struct qeth_reply *reply, unsigned long data)
4084 {
4085         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4086         struct qeth_ipacmd_setadpparms *setparms;
4087
4088         QETH_CARD_TEXT(card, 4, "prmadpcb");
4089
4090         setparms = &(cmd->data.setadapterparms);
4091         if (qeth_setadpparms_inspect_rc(cmd)) {
4092                 QETH_CARD_TEXT_(card, 4, "prmrc%x", cmd->hdr.return_code);
4093                 setparms->data.mode = SET_PROMISC_MODE_OFF;
4094         }
4095         card->info.promisc_mode = setparms->data.mode;
4096         return (cmd->hdr.return_code) ? -EIO : 0;
4097 }
4098
4099 void qeth_setadp_promisc_mode(struct qeth_card *card, bool enable)
4100 {
4101         enum qeth_ipa_promisc_modes mode = enable ? SET_PROMISC_MODE_ON :
4102                                                     SET_PROMISC_MODE_OFF;
4103         struct qeth_cmd_buffer *iob;
4104         struct qeth_ipa_cmd *cmd;
4105
4106         QETH_CARD_TEXT(card, 4, "setprom");
4107         QETH_CARD_TEXT_(card, 4, "mode:%x", mode);
4108
4109         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE,
4110                                    SETADP_DATA_SIZEOF(mode));
4111         if (!iob)
4112                 return;
4113         cmd = __ipa_cmd(iob);
4114         cmd->data.setadapterparms.data.mode = mode;
4115         qeth_send_ipa_cmd(card, iob, qeth_setadp_promisc_mode_cb, NULL);
4116 }
4117 EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode);
4118
4119 static int qeth_setadpparms_change_macaddr_cb(struct qeth_card *card,
4120                 struct qeth_reply *reply, unsigned long data)
4121 {
4122         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4123         struct qeth_ipacmd_setadpparms *adp_cmd;
4124
4125         QETH_CARD_TEXT(card, 4, "chgmaccb");
4126         if (qeth_setadpparms_inspect_rc(cmd))
4127                 return -EIO;
4128
4129         adp_cmd = &cmd->data.setadapterparms;
4130         if (!is_valid_ether_addr(adp_cmd->data.change_addr.addr))
4131                 return -EADDRNOTAVAIL;
4132
4133         if (IS_LAYER2(card) && IS_OSD(card) && !IS_VM_NIC(card) &&
4134             !(adp_cmd->hdr.flags & QETH_SETADP_FLAGS_VIRTUAL_MAC))
4135                 return -EADDRNOTAVAIL;
4136
4137         ether_addr_copy(card->dev->dev_addr, adp_cmd->data.change_addr.addr);
4138         return 0;
4139 }
4140
4141 int qeth_setadpparms_change_macaddr(struct qeth_card *card)
4142 {
4143         int rc;
4144         struct qeth_cmd_buffer *iob;
4145         struct qeth_ipa_cmd *cmd;
4146
4147         QETH_CARD_TEXT(card, 4, "chgmac");
4148
4149         iob = qeth_get_adapter_cmd(card, IPA_SETADP_ALTER_MAC_ADDRESS,
4150                                    SETADP_DATA_SIZEOF(change_addr));
4151         if (!iob)
4152                 return -ENOMEM;
4153         cmd = __ipa_cmd(iob);
4154         cmd->data.setadapterparms.data.change_addr.cmd = CHANGE_ADDR_READ_MAC;
4155         cmd->data.setadapterparms.data.change_addr.addr_size = ETH_ALEN;
4156         ether_addr_copy(cmd->data.setadapterparms.data.change_addr.addr,
4157                         card->dev->dev_addr);
4158         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_change_macaddr_cb,
4159                                NULL);
4160         return rc;
4161 }
4162 EXPORT_SYMBOL_GPL(qeth_setadpparms_change_macaddr);
4163
4164 static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card,
4165                 struct qeth_reply *reply, unsigned long data)
4166 {
4167         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4168         struct qeth_set_access_ctrl *access_ctrl_req;
4169         int fallback = *(int *)reply->param;
4170
4171         QETH_CARD_TEXT(card, 4, "setaccb");
4172         if (cmd->hdr.return_code)
4173                 return -EIO;
4174         qeth_setadpparms_inspect_rc(cmd);
4175
4176         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4177         QETH_CARD_TEXT_(card, 2, "rc=%d",
4178                         cmd->data.setadapterparms.hdr.return_code);
4179         if (cmd->data.setadapterparms.hdr.return_code !=
4180                                                 SET_ACCESS_CTRL_RC_SUCCESS)
4181                 QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%#x) on device %x: %#x\n",
4182                                  access_ctrl_req->subcmd_code, CARD_DEVID(card),
4183                                  cmd->data.setadapterparms.hdr.return_code);
4184         switch (cmd->data.setadapterparms.hdr.return_code) {
4185         case SET_ACCESS_CTRL_RC_SUCCESS:
4186                 if (card->options.isolation == ISOLATION_MODE_NONE) {
4187                         dev_info(&card->gdev->dev,
4188                             "QDIO data connection isolation is deactivated\n");
4189                 } else {
4190                         dev_info(&card->gdev->dev,
4191                             "QDIO data connection isolation is activated\n");
4192                 }
4193                 break;
4194         case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
4195                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already deactivated\n",
4196                                  CARD_DEVID(card));
4197                 if (fallback)
4198                         card->options.isolation = card->options.prev_isolation;
4199                 break;
4200         case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
4201                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already activated\n",
4202                                  CARD_DEVID(card));
4203                 if (fallback)
4204                         card->options.isolation = card->options.prev_isolation;
4205                 break;
4206         case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
4207                 dev_err(&card->gdev->dev, "Adapter does not "
4208                         "support QDIO data connection isolation\n");
4209                 break;
4210         case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
4211                 dev_err(&card->gdev->dev,
4212                         "Adapter is dedicated. "
4213                         "QDIO data connection isolation not supported\n");
4214                 if (fallback)
4215                         card->options.isolation = card->options.prev_isolation;
4216                 break;
4217         case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
4218                 dev_err(&card->gdev->dev,
4219                         "TSO does not permit QDIO data connection isolation\n");
4220                 if (fallback)
4221                         card->options.isolation = card->options.prev_isolation;
4222                 break;
4223         case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED:
4224                 dev_err(&card->gdev->dev, "The adjacent switch port does not "
4225                         "support reflective relay mode\n");
4226                 if (fallback)
4227                         card->options.isolation = card->options.prev_isolation;
4228                 break;
4229         case SET_ACCESS_CTRL_RC_REFLREL_FAILED:
4230                 dev_err(&card->gdev->dev, "The reflective relay mode cannot be "
4231                                         "enabled at the adjacent switch port");
4232                 if (fallback)
4233                         card->options.isolation = card->options.prev_isolation;
4234                 break;
4235         case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED:
4236                 dev_warn(&card->gdev->dev, "Turning off reflective relay mode "
4237                                         "at the adjacent switch failed\n");
4238                 break;
4239         default:
4240                 /* this should never happen */
4241                 if (fallback)
4242                         card->options.isolation = card->options.prev_isolation;
4243                 break;
4244         }
4245         return (cmd->hdr.return_code) ? -EIO : 0;
4246 }
4247
4248 static int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
4249                 enum qeth_ipa_isolation_modes isolation, int fallback)
4250 {
4251         int rc;
4252         struct qeth_cmd_buffer *iob;
4253         struct qeth_ipa_cmd *cmd;
4254         struct qeth_set_access_ctrl *access_ctrl_req;
4255
4256         QETH_CARD_TEXT(card, 4, "setacctl");
4257
4258         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL,
4259                                    SETADP_DATA_SIZEOF(set_access_ctrl));
4260         if (!iob)
4261                 return -ENOMEM;
4262         cmd = __ipa_cmd(iob);
4263         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4264         access_ctrl_req->subcmd_code = isolation;
4265
4266         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb,
4267                                &fallback);
4268         QETH_CARD_TEXT_(card, 2, "rc=%d", rc);
4269         return rc;
4270 }
4271
4272 int qeth_set_access_ctrl_online(struct qeth_card *card, int fallback)
4273 {
4274         int rc = 0;
4275
4276         QETH_CARD_TEXT(card, 4, "setactlo");
4277
4278         if ((IS_OSD(card) || IS_OSX(card)) &&
4279             qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) {
4280                 rc = qeth_setadpparms_set_access_ctrl(card,
4281                         card->options.isolation, fallback);
4282                 if (rc) {
4283                         QETH_DBF_MESSAGE(3, "IPA(SET_ACCESS_CTRL(%d) on device %x: sent failed\n",
4284                                          rc, CARD_DEVID(card));
4285                         rc = -EOPNOTSUPP;
4286                 }
4287         } else if (card->options.isolation != ISOLATION_MODE_NONE) {
4288                 card->options.isolation = ISOLATION_MODE_NONE;
4289
4290                 dev_err(&card->gdev->dev, "Adapter does not "
4291                         "support QDIO data connection isolation\n");
4292                 rc = -EOPNOTSUPP;
4293         }
4294         return rc;
4295 }
4296
4297 void qeth_tx_timeout(struct net_device *dev)
4298 {
4299         struct qeth_card *card;
4300
4301         card = dev->ml_priv;
4302         QETH_CARD_TEXT(card, 4, "txtimeo");
4303         qeth_schedule_recovery(card);
4304 }
4305 EXPORT_SYMBOL_GPL(qeth_tx_timeout);
4306
4307 static int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum)
4308 {
4309         struct qeth_card *card = dev->ml_priv;
4310         int rc = 0;
4311
4312         switch (regnum) {
4313         case MII_BMCR: /* Basic mode control register */
4314                 rc = BMCR_FULLDPLX;
4315                 if ((card->info.link_type != QETH_LINK_TYPE_GBIT_ETH) &&
4316                     (card->info.link_type != QETH_LINK_TYPE_OSN) &&
4317                     (card->info.link_type != QETH_LINK_TYPE_10GBIT_ETH) &&
4318                     (card->info.link_type != QETH_LINK_TYPE_25GBIT_ETH))
4319                         rc |= BMCR_SPEED100;
4320                 break;
4321         case MII_BMSR: /* Basic mode status register */
4322                 rc = BMSR_ERCAP | BMSR_ANEGCOMPLETE | BMSR_LSTATUS |
4323                      BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | BMSR_100FULL |
4324                      BMSR_100BASE4;
4325                 break;
4326         case MII_PHYSID1: /* PHYS ID 1 */
4327                 rc = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 8) |
4328                      dev->dev_addr[2];
4329                 rc = (rc >> 5) & 0xFFFF;
4330                 break;
4331         case MII_PHYSID2: /* PHYS ID 2 */
4332                 rc = (dev->dev_addr[2] << 10) & 0xFFFF;
4333                 break;
4334         case MII_ADVERTISE: /* Advertisement control reg */
4335                 rc = ADVERTISE_ALL;
4336                 break;
4337         case MII_LPA: /* Link partner ability reg */
4338                 rc = LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL |
4339                      LPA_100BASE4 | LPA_LPACK;
4340                 break;
4341         case MII_EXPANSION: /* Expansion register */
4342                 break;
4343         case MII_DCOUNTER: /* disconnect counter */
4344                 break;
4345         case MII_FCSCOUNTER: /* false carrier counter */
4346                 break;
4347         case MII_NWAYTEST: /* N-way auto-neg test register */
4348                 break;
4349         case MII_RERRCOUNTER: /* rx error counter */
4350                 rc = card->stats.rx_length_errors +
4351                      card->stats.rx_frame_errors +
4352                      card->stats.rx_fifo_errors;
4353                 break;
4354         case MII_SREVISION: /* silicon revision */
4355                 break;
4356         case MII_RESV1: /* reserved 1 */
4357                 break;
4358         case MII_LBRERROR: /* loopback, rx, bypass error */
4359                 break;
4360         case MII_PHYADDR: /* physical address */
4361                 break;
4362         case MII_RESV2: /* reserved 2 */
4363                 break;
4364         case MII_TPISTATUS: /* TPI status for 10mbps */
4365                 break;
4366         case MII_NCONFIG: /* network interface config */
4367                 break;
4368         default:
4369                 break;
4370         }
4371         return rc;
4372 }
4373
4374 static int qeth_snmp_command_cb(struct qeth_card *card,
4375                                 struct qeth_reply *reply, unsigned long data)
4376 {
4377         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4378         struct qeth_arp_query_info *qinfo = reply->param;
4379         struct qeth_ipacmd_setadpparms *adp_cmd;
4380         unsigned int data_len;
4381         void *snmp_data;
4382
4383         QETH_CARD_TEXT(card, 3, "snpcmdcb");
4384
4385         if (cmd->hdr.return_code) {
4386                 QETH_CARD_TEXT_(card, 4, "scer1%x", cmd->hdr.return_code);
4387                 return -EIO;
4388         }
4389         if (cmd->data.setadapterparms.hdr.return_code) {
4390                 cmd->hdr.return_code =
4391                         cmd->data.setadapterparms.hdr.return_code;
4392                 QETH_CARD_TEXT_(card, 4, "scer2%x", cmd->hdr.return_code);
4393                 return -EIO;
4394         }
4395
4396         adp_cmd = &cmd->data.setadapterparms;
4397         data_len = adp_cmd->hdr.cmdlength - sizeof(adp_cmd->hdr);
4398         if (adp_cmd->hdr.seq_no == 1) {
4399                 snmp_data = &adp_cmd->data.snmp;
4400         } else {
4401                 snmp_data = &adp_cmd->data.snmp.request;
4402                 data_len -= offsetof(struct qeth_snmp_cmd, request);
4403         }
4404
4405         /* check if there is enough room in userspace */
4406         if ((qinfo->udata_len - qinfo->udata_offset) < data_len) {
4407                 QETH_CARD_TEXT_(card, 4, "scer3%i", -ENOSPC);
4408                 return -ENOSPC;
4409         }
4410         QETH_CARD_TEXT_(card, 4, "snore%i",
4411                         cmd->data.setadapterparms.hdr.used_total);
4412         QETH_CARD_TEXT_(card, 4, "sseqn%i",
4413                         cmd->data.setadapterparms.hdr.seq_no);
4414         /*copy entries to user buffer*/
4415         memcpy(qinfo->udata + qinfo->udata_offset, snmp_data, data_len);
4416         qinfo->udata_offset += data_len;
4417
4418         if (cmd->data.setadapterparms.hdr.seq_no <
4419             cmd->data.setadapterparms.hdr.used_total)
4420                 return 1;
4421         return 0;
4422 }
4423
4424 static int qeth_snmp_command(struct qeth_card *card, char __user *udata)
4425 {
4426         struct qeth_snmp_ureq __user *ureq;
4427         struct qeth_cmd_buffer *iob;
4428         unsigned int req_len;
4429         struct qeth_arp_query_info qinfo = {0, };
4430         int rc = 0;
4431
4432         QETH_CARD_TEXT(card, 3, "snmpcmd");
4433
4434         if (IS_VM_NIC(card))
4435                 return -EOPNOTSUPP;
4436
4437         if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) &&
4438             IS_LAYER3(card))
4439                 return -EOPNOTSUPP;
4440
4441         ureq = (struct qeth_snmp_ureq __user *) udata;
4442         if (get_user(qinfo.udata_len, &ureq->hdr.data_len) ||
4443             get_user(req_len, &ureq->hdr.req_len))
4444                 return -EFAULT;
4445
4446         /* Sanitize user input, to avoid overflows in iob size calculation: */
4447         if (req_len > QETH_BUFSIZE)
4448                 return -EINVAL;
4449
4450         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL, req_len);
4451         if (!iob)
4452                 return -ENOMEM;
4453
4454         if (copy_from_user(&__ipa_cmd(iob)->data.setadapterparms.data.snmp,
4455                            &ureq->cmd, req_len)) {
4456                 qeth_put_cmd(iob);
4457                 return -EFAULT;
4458         }
4459
4460         qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
4461         if (!qinfo.udata) {
4462                 qeth_put_cmd(iob);
4463                 return -ENOMEM;
4464         }
4465         qinfo.udata_offset = sizeof(struct qeth_snmp_ureq_hdr);
4466
4467         rc = qeth_send_ipa_cmd(card, iob, qeth_snmp_command_cb, &qinfo);
4468         if (rc)
4469                 QETH_DBF_MESSAGE(2, "SNMP command failed on device %x: (%#x)\n",
4470                                  CARD_DEVID(card), rc);
4471         else {
4472                 if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
4473                         rc = -EFAULT;
4474         }
4475
4476         kfree(qinfo.udata);
4477         return rc;
4478 }
4479
4480 static int qeth_setadpparms_query_oat_cb(struct qeth_card *card,
4481                 struct qeth_reply *reply, unsigned long data)
4482 {
4483         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4484         struct qeth_qoat_priv *priv;
4485         char *resdata;
4486         int resdatalen;
4487
4488         QETH_CARD_TEXT(card, 3, "qoatcb");
4489         if (qeth_setadpparms_inspect_rc(cmd))
4490                 return -EIO;
4491
4492         priv = (struct qeth_qoat_priv *)reply->param;
4493         resdatalen = cmd->data.setadapterparms.hdr.cmdlength;
4494         resdata = (char *)data + 28;
4495
4496         if (resdatalen > (priv->buffer_len - priv->response_len))
4497                 return -ENOSPC;
4498
4499         memcpy((priv->buffer + priv->response_len), resdata,
4500                 resdatalen);
4501         priv->response_len += resdatalen;
4502
4503         if (cmd->data.setadapterparms.hdr.seq_no <
4504             cmd->data.setadapterparms.hdr.used_total)
4505                 return 1;
4506         return 0;
4507 }
4508
4509 static int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
4510 {
4511         int rc = 0;
4512         struct qeth_cmd_buffer *iob;
4513         struct qeth_ipa_cmd *cmd;
4514         struct qeth_query_oat *oat_req;
4515         struct qeth_query_oat_data oat_data;
4516         struct qeth_qoat_priv priv;
4517         void __user *tmp;
4518
4519         QETH_CARD_TEXT(card, 3, "qoatcmd");
4520
4521         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT)) {
4522                 rc = -EOPNOTSUPP;
4523                 goto out;
4524         }
4525
4526         if (copy_from_user(&oat_data, udata,
4527             sizeof(struct qeth_query_oat_data))) {
4528                         rc = -EFAULT;
4529                         goto out;
4530         }
4531
4532         priv.buffer_len = oat_data.buffer_len;
4533         priv.response_len = 0;
4534         priv.buffer = vzalloc(oat_data.buffer_len);
4535         if (!priv.buffer) {
4536                 rc = -ENOMEM;
4537                 goto out;
4538         }
4539
4540         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4541                                    SETADP_DATA_SIZEOF(query_oat));
4542         if (!iob) {
4543                 rc = -ENOMEM;
4544                 goto out_free;
4545         }
4546         cmd = __ipa_cmd(iob);
4547         oat_req = &cmd->data.setadapterparms.data.query_oat;
4548         oat_req->subcmd_code = oat_data.command;
4549
4550         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb,
4551                                &priv);
4552         if (!rc) {
4553                 if (is_compat_task())
4554                         tmp = compat_ptr(oat_data.ptr);
4555                 else
4556                         tmp = (void __user *)(unsigned long)oat_data.ptr;
4557
4558                 if (copy_to_user(tmp, priv.buffer,
4559                     priv.response_len)) {
4560                         rc = -EFAULT;
4561                         goto out_free;
4562                 }
4563
4564                 oat_data.response_len = priv.response_len;
4565
4566                 if (copy_to_user(udata, &oat_data,
4567                     sizeof(struct qeth_query_oat_data)))
4568                         rc = -EFAULT;
4569         }
4570
4571 out_free:
4572         vfree(priv.buffer);
4573 out:
4574         return rc;
4575 }
4576
4577 static int qeth_query_card_info_cb(struct qeth_card *card,
4578                                    struct qeth_reply *reply, unsigned long data)
4579 {
4580         struct carrier_info *carrier_info = (struct carrier_info *)reply->param;
4581         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4582         struct qeth_query_card_info *card_info;
4583
4584         QETH_CARD_TEXT(card, 2, "qcrdincb");
4585         if (qeth_setadpparms_inspect_rc(cmd))
4586                 return -EIO;
4587
4588         card_info = &cmd->data.setadapterparms.data.card_info;
4589         carrier_info->card_type = card_info->card_type;
4590         carrier_info->port_mode = card_info->port_mode;
4591         carrier_info->port_speed = card_info->port_speed;
4592         return 0;
4593 }
4594
4595 int qeth_query_card_info(struct qeth_card *card,
4596                          struct carrier_info *carrier_info)
4597 {
4598         struct qeth_cmd_buffer *iob;
4599
4600         QETH_CARD_TEXT(card, 2, "qcrdinfo");
4601         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_CARD_INFO))
4602                 return -EOPNOTSUPP;
4603         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_CARD_INFO, 0);
4604         if (!iob)
4605                 return -ENOMEM;
4606         return qeth_send_ipa_cmd(card, iob, qeth_query_card_info_cb,
4607                                         (void *)carrier_info);
4608 }
4609
4610 /**
4611  * qeth_vm_request_mac() - Request a hypervisor-managed MAC address
4612  * @card: pointer to a qeth_card
4613  *
4614  * Returns
4615  *      0, if a MAC address has been set for the card's netdevice
4616  *      a return code, for various error conditions
4617  */
4618 int qeth_vm_request_mac(struct qeth_card *card)
4619 {
4620         struct diag26c_mac_resp *response;
4621         struct diag26c_mac_req *request;
4622         struct ccw_dev_id id;
4623         int rc;
4624
4625         QETH_CARD_TEXT(card, 2, "vmreqmac");
4626
4627         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
4628         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
4629         if (!request || !response) {
4630                 rc = -ENOMEM;
4631                 goto out;
4632         }
4633
4634         ccw_device_get_id(CARD_DDEV(card), &id);
4635         request->resp_buf_len = sizeof(*response);
4636         request->resp_version = DIAG26C_VERSION2;
4637         request->op_code = DIAG26C_GET_MAC;
4638         request->devno = id.devno;
4639
4640         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4641         rc = diag26c(request, response, DIAG26C_MAC_SERVICES);
4642         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4643         if (rc)
4644                 goto out;
4645         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
4646
4647         if (request->resp_buf_len < sizeof(*response) ||
4648             response->version != request->resp_version) {
4649                 rc = -EIO;
4650                 QETH_CARD_TEXT(card, 2, "badresp");
4651                 QETH_CARD_HEX(card, 2, &request->resp_buf_len,
4652                               sizeof(request->resp_buf_len));
4653         } else if (!is_valid_ether_addr(response->mac)) {
4654                 rc = -EINVAL;
4655                 QETH_CARD_TEXT(card, 2, "badmac");
4656                 QETH_CARD_HEX(card, 2, response->mac, ETH_ALEN);
4657         } else {
4658                 ether_addr_copy(card->dev->dev_addr, response->mac);
4659         }
4660
4661 out:
4662         kfree(response);
4663         kfree(request);
4664         return rc;
4665 }
4666 EXPORT_SYMBOL_GPL(qeth_vm_request_mac);
4667
4668 static void qeth_determine_capabilities(struct qeth_card *card)
4669 {
4670         int rc;
4671         struct ccw_device *ddev;
4672         int ddev_offline = 0;
4673
4674         QETH_CARD_TEXT(card, 2, "detcapab");
4675         ddev = CARD_DDEV(card);
4676         if (!ddev->online) {
4677                 ddev_offline = 1;
4678                 rc = ccw_device_set_online(ddev);
4679                 if (rc) {
4680                         QETH_CARD_TEXT_(card, 2, "3err%d", rc);
4681                         goto out;
4682                 }
4683         }
4684
4685         rc = qeth_read_conf_data(card);
4686         if (rc) {
4687                 QETH_DBF_MESSAGE(2, "qeth_read_conf_data on device %x returned %i\n",
4688                                  CARD_DEVID(card), rc);
4689                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
4690                 goto out_offline;
4691         }
4692
4693         rc = qdio_get_ssqd_desc(ddev, &card->ssqd);
4694         if (rc)
4695                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
4696
4697         QETH_CARD_TEXT_(card, 2, "qfmt%d", card->ssqd.qfmt);
4698         QETH_CARD_TEXT_(card, 2, "ac1:%02x", card->ssqd.qdioac1);
4699         QETH_CARD_TEXT_(card, 2, "ac2:%04x", card->ssqd.qdioac2);
4700         QETH_CARD_TEXT_(card, 2, "ac3:%04x", card->ssqd.qdioac3);
4701         QETH_CARD_TEXT_(card, 2, "icnt%d", card->ssqd.icnt);
4702         if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) ||
4703             ((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) ||
4704             ((card->ssqd.qdioac3 & CHSC_AC3_FORMAT2_CQ_AVAILABLE) == 0))) {
4705                 dev_info(&card->gdev->dev,
4706                         "Completion Queueing supported\n");
4707         } else {
4708                 card->options.cq = QETH_CQ_NOTAVAILABLE;
4709         }
4710
4711
4712 out_offline:
4713         if (ddev_offline == 1)
4714                 ccw_device_set_offline(ddev);
4715 out:
4716         return;
4717 }
4718
4719 static void qeth_qdio_establish_cq(struct qeth_card *card,
4720                                    struct qdio_buffer **in_sbal_ptrs,
4721                                    void (**queue_start_poll)
4722                                         (struct ccw_device *, int,
4723                                          unsigned long))
4724 {
4725         int i;
4726
4727         if (card->options.cq == QETH_CQ_ENABLED) {
4728                 int offset = QDIO_MAX_BUFFERS_PER_Q *
4729                              (card->qdio.no_in_queues - 1);
4730                 for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i) {
4731                         in_sbal_ptrs[offset + i] = (struct qdio_buffer *)
4732                                 virt_to_phys(card->qdio.c_q->bufs[i].buffer);
4733                 }
4734
4735                 queue_start_poll[card->qdio.no_in_queues - 1] = NULL;
4736         }
4737 }
4738
4739 static int qeth_qdio_establish(struct qeth_card *card)
4740 {
4741         struct qdio_initialize init_data;
4742         char *qib_param_field;
4743         struct qdio_buffer **in_sbal_ptrs;
4744         void (**queue_start_poll) (struct ccw_device *, int, unsigned long);
4745         struct qdio_buffer **out_sbal_ptrs;
4746         int i, j, k;
4747         int rc = 0;
4748
4749         QETH_CARD_TEXT(card, 2, "qdioest");
4750
4751         qib_param_field = kzalloc(FIELD_SIZEOF(struct qib, parm), GFP_KERNEL);
4752         if (!qib_param_field) {
4753                 rc =  -ENOMEM;
4754                 goto out_free_nothing;
4755         }
4756
4757         qeth_create_qib_param_field(card, qib_param_field);
4758         qeth_create_qib_param_field_blkt(card, qib_param_field);
4759
4760         in_sbal_ptrs = kcalloc(card->qdio.no_in_queues * QDIO_MAX_BUFFERS_PER_Q,
4761                                sizeof(void *),
4762                                GFP_KERNEL);
4763         if (!in_sbal_ptrs) {
4764                 rc = -ENOMEM;
4765                 goto out_free_qib_param;
4766         }
4767         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i) {
4768                 in_sbal_ptrs[i] = (struct qdio_buffer *)
4769                         virt_to_phys(card->qdio.in_q->bufs[i].buffer);
4770         }
4771
4772         queue_start_poll = kcalloc(card->qdio.no_in_queues, sizeof(void *),
4773                                    GFP_KERNEL);
4774         if (!queue_start_poll) {
4775                 rc = -ENOMEM;
4776                 goto out_free_in_sbals;
4777         }
4778         for (i = 0; i < card->qdio.no_in_queues; ++i)
4779                 queue_start_poll[i] = qeth_qdio_start_poll;
4780
4781         qeth_qdio_establish_cq(card, in_sbal_ptrs, queue_start_poll);
4782
4783         out_sbal_ptrs =
4784                 kcalloc(card->qdio.no_out_queues * QDIO_MAX_BUFFERS_PER_Q,
4785                         sizeof(void *),
4786                         GFP_KERNEL);
4787         if (!out_sbal_ptrs) {
4788                 rc = -ENOMEM;
4789                 goto out_free_queue_start_poll;
4790         }
4791         for (i = 0, k = 0; i < card->qdio.no_out_queues; ++i)
4792                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j, ++k) {
4793                         out_sbal_ptrs[k] = (struct qdio_buffer *)virt_to_phys(
4794                                 card->qdio.out_qs[i]->bufs[j]->buffer);
4795                 }
4796
4797         memset(&init_data, 0, sizeof(struct qdio_initialize));
4798         init_data.cdev                   = CARD_DDEV(card);
4799         init_data.q_format               = IS_IQD(card) ? QDIO_IQDIO_QFMT :
4800                                                           QDIO_QETH_QFMT;
4801         init_data.qib_param_field_format = 0;
4802         init_data.qib_param_field        = qib_param_field;
4803         init_data.no_input_qs            = card->qdio.no_in_queues;
4804         init_data.no_output_qs           = card->qdio.no_out_queues;
4805         init_data.input_handler          = qeth_qdio_input_handler;
4806         init_data.output_handler         = qeth_qdio_output_handler;
4807         init_data.queue_start_poll_array = queue_start_poll;
4808         init_data.int_parm               = (unsigned long) card;
4809         init_data.input_sbal_addr_array  = in_sbal_ptrs;
4810         init_data.output_sbal_addr_array = out_sbal_ptrs;
4811         init_data.output_sbal_state_array = card->qdio.out_bufstates;
4812         init_data.scan_threshold         = IS_IQD(card) ? 0 : 32;
4813
4814         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED,
4815                 QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) {
4816                 rc = qdio_allocate(&init_data);
4817                 if (rc) {
4818                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
4819                         goto out;
4820                 }
4821                 rc = qdio_establish(&init_data);
4822                 if (rc) {
4823                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
4824                         qdio_free(CARD_DDEV(card));
4825                 }
4826         }
4827
4828         switch (card->options.cq) {
4829         case QETH_CQ_ENABLED:
4830                 dev_info(&card->gdev->dev, "Completion Queue support enabled");
4831                 break;
4832         case QETH_CQ_DISABLED:
4833                 dev_info(&card->gdev->dev, "Completion Queue support disabled");
4834                 break;
4835         default:
4836                 break;
4837         }
4838 out:
4839         kfree(out_sbal_ptrs);
4840 out_free_queue_start_poll:
4841         kfree(queue_start_poll);
4842 out_free_in_sbals:
4843         kfree(in_sbal_ptrs);
4844 out_free_qib_param:
4845         kfree(qib_param_field);
4846 out_free_nothing:
4847         return rc;
4848 }
4849
4850 static void qeth_core_free_card(struct qeth_card *card)
4851 {
4852         QETH_CARD_TEXT(card, 2, "freecrd");
4853         qeth_clean_channel(&card->read);
4854         qeth_clean_channel(&card->write);
4855         qeth_clean_channel(&card->data);
4856         qeth_put_cmd(card->read_cmd);
4857         destroy_workqueue(card->event_wq);
4858         unregister_service_level(&card->qeth_service_level);
4859         dev_set_drvdata(&card->gdev->dev, NULL);
4860         kfree(card);
4861 }
4862
4863 void qeth_trace_features(struct qeth_card *card)
4864 {
4865         QETH_CARD_TEXT(card, 2, "features");
4866         QETH_CARD_HEX(card, 2, &card->options.ipa4, sizeof(card->options.ipa4));
4867         QETH_CARD_HEX(card, 2, &card->options.ipa6, sizeof(card->options.ipa6));
4868         QETH_CARD_HEX(card, 2, &card->options.adp, sizeof(card->options.adp));
4869         QETH_CARD_HEX(card, 2, &card->info.diagass_support,
4870                       sizeof(card->info.diagass_support));
4871 }
4872 EXPORT_SYMBOL_GPL(qeth_trace_features);
4873
4874 static struct ccw_device_id qeth_ids[] = {
4875         {CCW_DEVICE_DEVTYPE(0x1731, 0x01, 0x1732, 0x01),
4876                                         .driver_info = QETH_CARD_TYPE_OSD},
4877         {CCW_DEVICE_DEVTYPE(0x1731, 0x05, 0x1732, 0x05),
4878                                         .driver_info = QETH_CARD_TYPE_IQD},
4879         {CCW_DEVICE_DEVTYPE(0x1731, 0x06, 0x1732, 0x06),
4880                                         .driver_info = QETH_CARD_TYPE_OSN},
4881         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x03),
4882                                         .driver_info = QETH_CARD_TYPE_OSM},
4883         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x02),
4884                                         .driver_info = QETH_CARD_TYPE_OSX},
4885         {},
4886 };
4887 MODULE_DEVICE_TABLE(ccw, qeth_ids);
4888
4889 static struct ccw_driver qeth_ccw_driver = {
4890         .driver = {
4891                 .owner = THIS_MODULE,
4892                 .name = "qeth",
4893         },
4894         .ids = qeth_ids,
4895         .probe = ccwgroup_probe_ccwdev,
4896         .remove = ccwgroup_remove_ccwdev,
4897 };
4898
4899 int qeth_core_hardsetup_card(struct qeth_card *card, bool *carrier_ok)
4900 {
4901         int retries = 3;
4902         int rc;
4903
4904         QETH_CARD_TEXT(card, 2, "hrdsetup");
4905         atomic_set(&card->force_alloc_skb, 0);
4906         rc = qeth_update_from_chp_desc(card);
4907         if (rc)
4908                 return rc;
4909 retry:
4910         if (retries < 3)
4911                 QETH_DBF_MESSAGE(2, "Retrying to do IDX activates on device %x.\n",
4912                                  CARD_DEVID(card));
4913         rc = qeth_qdio_clear_card(card, !IS_IQD(card));
4914         ccw_device_set_offline(CARD_DDEV(card));
4915         ccw_device_set_offline(CARD_WDEV(card));
4916         ccw_device_set_offline(CARD_RDEV(card));
4917         qdio_free(CARD_DDEV(card));
4918         rc = ccw_device_set_online(CARD_RDEV(card));
4919         if (rc)
4920                 goto retriable;
4921         rc = ccw_device_set_online(CARD_WDEV(card));
4922         if (rc)
4923                 goto retriable;
4924         rc = ccw_device_set_online(CARD_DDEV(card));
4925         if (rc)
4926                 goto retriable;
4927 retriable:
4928         if (rc == -ERESTARTSYS) {
4929                 QETH_CARD_TEXT(card, 2, "break1");
4930                 return rc;
4931         } else if (rc) {
4932                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
4933                 if (--retries < 0)
4934                         goto out;
4935                 else
4936                         goto retry;
4937         }
4938         qeth_determine_capabilities(card);
4939         qeth_init_tokens(card);
4940         qeth_init_func_level(card);
4941
4942         rc = qeth_idx_activate_read_channel(card);
4943         if (rc == -EINTR) {
4944                 QETH_CARD_TEXT(card, 2, "break2");
4945                 return rc;
4946         } else if (rc) {
4947                 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
4948                 if (--retries < 0)
4949                         goto out;
4950                 else
4951                         goto retry;
4952         }
4953
4954         rc = qeth_idx_activate_write_channel(card);
4955         if (rc == -EINTR) {
4956                 QETH_CARD_TEXT(card, 2, "break3");
4957                 return rc;
4958         } else if (rc) {
4959                 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
4960                 if (--retries < 0)
4961                         goto out;
4962                 else
4963                         goto retry;
4964         }
4965         card->read_or_write_problem = 0;
4966         rc = qeth_mpc_initialize(card);
4967         if (rc) {
4968                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
4969                 goto out;
4970         }
4971
4972         rc = qeth_send_startlan(card);
4973         if (rc) {
4974                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
4975                 if (rc == -ENETDOWN) {
4976                         dev_warn(&card->gdev->dev, "The LAN is offline\n");
4977                         *carrier_ok = false;
4978                 } else {
4979                         goto out;
4980                 }
4981         } else {
4982                 *carrier_ok = true;
4983         }
4984
4985         card->options.ipa4.supported_funcs = 0;
4986         card->options.ipa6.supported_funcs = 0;
4987         card->options.adp.supported_funcs = 0;
4988         card->options.sbp.supported_funcs = 0;
4989         card->info.diagass_support = 0;
4990         rc = qeth_query_ipassists(card, QETH_PROT_IPV4);
4991         if (rc == -ENOMEM)
4992                 goto out;
4993         if (qeth_is_supported(card, IPA_IPV6)) {
4994                 rc = qeth_query_ipassists(card, QETH_PROT_IPV6);
4995                 if (rc == -ENOMEM)
4996                         goto out;
4997         }
4998         if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
4999                 rc = qeth_query_setadapterparms(card);
5000                 if (rc < 0) {
5001                         QETH_CARD_TEXT_(card, 2, "7err%d", rc);
5002                         goto out;
5003                 }
5004         }
5005         if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
5006                 rc = qeth_query_setdiagass(card);
5007                 if (rc < 0) {
5008                         QETH_CARD_TEXT_(card, 2, "8err%d", rc);
5009                         goto out;
5010                 }
5011         }
5012
5013         if (!qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP) ||
5014             (card->info.hwtrap && qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM)))
5015                 card->info.hwtrap = 0;
5016
5017         rc = qeth_set_access_ctrl_online(card, 0);
5018         if (rc)
5019                 goto out;
5020
5021         return 0;
5022 out:
5023         dev_warn(&card->gdev->dev, "The qeth device driver failed to recover "
5024                 "an error on the device\n");
5025         QETH_DBF_MESSAGE(2, "Initialization for device %x failed in hardsetup! rc=%d\n",
5026                          CARD_DEVID(card), rc);
5027         return rc;
5028 }
5029 EXPORT_SYMBOL_GPL(qeth_core_hardsetup_card);
5030
5031 static void qeth_create_skb_frag(struct qdio_buffer_element *element,
5032                                  struct sk_buff *skb, int offset, int data_len)
5033 {
5034         struct page *page = virt_to_page(element->addr);
5035         unsigned int next_frag;
5036
5037         /* first fill the linear space */
5038         if (!skb->len) {
5039                 unsigned int linear = min(data_len, skb_tailroom(skb));
5040
5041                 skb_put_data(skb, element->addr + offset, linear);
5042                 data_len -= linear;
5043                 if (!data_len)
5044                         return;
5045                 offset += linear;
5046                 /* fall through to add page frag for remaining data */
5047         }
5048
5049         next_frag = skb_shinfo(skb)->nr_frags;
5050         get_page(page);
5051         skb_add_rx_frag(skb, next_frag, page, offset, data_len, data_len);
5052 }
5053
5054 static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale)
5055 {
5056         return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY);
5057 }
5058
5059 struct sk_buff *qeth_core_get_next_skb(struct qeth_card *card,
5060                 struct qeth_qdio_buffer *qethbuffer,
5061                 struct qdio_buffer_element **__element, int *__offset,
5062                 struct qeth_hdr **hdr)
5063 {
5064         struct qdio_buffer_element *element = *__element;
5065         struct qdio_buffer *buffer = qethbuffer->buffer;
5066         int offset = *__offset;
5067         bool use_rx_sg = false;
5068         unsigned int headroom;
5069         struct sk_buff *skb;
5070         int skb_len = 0;
5071         void *data_ptr;
5072         int data_len;
5073
5074 next_packet:
5075         /* qeth_hdr must not cross element boundaries */
5076         while (element->length < offset + sizeof(struct qeth_hdr)) {
5077                 if (qeth_is_last_sbale(element))
5078                         return NULL;
5079                 element++;
5080                 offset = 0;
5081         }
5082         *hdr = element->addr + offset;
5083
5084         offset += sizeof(struct qeth_hdr);
5085         switch ((*hdr)->hdr.l2.id) {
5086         case QETH_HEADER_TYPE_LAYER2:
5087                 skb_len = (*hdr)->hdr.l2.pkt_length;
5088                 headroom = 0;
5089                 break;
5090         case QETH_HEADER_TYPE_LAYER3:
5091                 skb_len = (*hdr)->hdr.l3.length;
5092                 if (!IS_LAYER3(card)) {
5093                         QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5094                         skb = NULL;
5095                         goto walk_packet;
5096                 }
5097
5098                 headroom = ETH_HLEN;
5099                 break;
5100         case QETH_HEADER_TYPE_OSN:
5101                 skb_len = (*hdr)->hdr.osn.pdu_length;
5102                 if (!IS_OSN(card)) {
5103                         QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5104                         skb = NULL;
5105                         goto walk_packet;
5106                 }
5107
5108                 headroom = sizeof(struct qeth_hdr);
5109                 break;
5110         default:
5111                 if ((*hdr)->hdr.l2.id & QETH_HEADER_MASK_INVAL)
5112                         QETH_CARD_STAT_INC(card, rx_frame_errors);
5113                 else
5114                         QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5115
5116                 /* Can't determine packet length, drop the whole buffer. */
5117                 return NULL;
5118         }
5119
5120         if (!skb_len)
5121                 return NULL;
5122
5123         use_rx_sg = (card->options.cq == QETH_CQ_ENABLED) ||
5124                     ((skb_len >= card->options.rx_sg_cb) &&
5125                      !atomic_read(&card->force_alloc_skb) &&
5126                      !IS_OSN(card));
5127
5128         if (use_rx_sg && qethbuffer->rx_skb) {
5129                 /* QETH_CQ_ENABLED only: */
5130                 skb = qethbuffer->rx_skb;
5131                 qethbuffer->rx_skb = NULL;
5132         } else {
5133                 unsigned int linear = (use_rx_sg) ? QETH_RX_PULL_LEN : skb_len;
5134
5135                 skb = napi_alloc_skb(&card->napi, linear + headroom);
5136         }
5137
5138         if (!skb)
5139                 QETH_CARD_STAT_INC(card, rx_dropped_nomem);
5140         else if (headroom)
5141                 skb_reserve(skb, headroom);
5142
5143 walk_packet:
5144         data_ptr = element->addr + offset;
5145         while (skb_len) {
5146                 data_len = min(skb_len, (int)(element->length - offset));
5147
5148                 if (skb && data_len) {
5149                         if (use_rx_sg)
5150                                 qeth_create_skb_frag(element, skb, offset,
5151                                                      data_len);
5152                         else
5153                                 skb_put_data(skb, data_ptr, data_len);
5154                 }
5155                 skb_len -= data_len;
5156                 if (skb_len) {
5157                         if (qeth_is_last_sbale(element)) {
5158                                 QETH_CARD_TEXT(card, 4, "unexeob");
5159                                 QETH_CARD_HEX(card, 2, buffer, sizeof(void *));
5160                                 if (skb) {
5161                                         dev_kfree_skb_any(skb);
5162                                         QETH_CARD_STAT_INC(card,
5163                                                            rx_length_errors);
5164                                 }
5165                                 return NULL;
5166                         }
5167                         element++;
5168                         offset = 0;
5169                         data_ptr = element->addr;
5170                 } else {
5171                         offset += data_len;
5172                 }
5173         }
5174
5175         /* This packet was skipped, go get another one: */
5176         if (!skb)
5177                 goto next_packet;
5178
5179         *__element = element;
5180         *__offset = offset;
5181         if (use_rx_sg) {
5182                 QETH_CARD_STAT_INC(card, rx_sg_skbs);
5183                 QETH_CARD_STAT_ADD(card, rx_sg_frags,
5184                                    skb_shinfo(skb)->nr_frags);
5185         }
5186         return skb;
5187 }
5188 EXPORT_SYMBOL_GPL(qeth_core_get_next_skb);
5189
5190 int qeth_poll(struct napi_struct *napi, int budget)
5191 {
5192         struct qeth_card *card = container_of(napi, struct qeth_card, napi);
5193         int work_done = 0;
5194         struct qeth_qdio_buffer *buffer;
5195         int done;
5196         int new_budget = budget;
5197
5198         while (1) {
5199                 if (!card->rx.b_count) {
5200                         card->rx.qdio_err = 0;
5201                         card->rx.b_count = qdio_get_next_buffers(
5202                                 card->data.ccwdev, 0, &card->rx.b_index,
5203                                 &card->rx.qdio_err);
5204                         if (card->rx.b_count <= 0) {
5205                                 card->rx.b_count = 0;
5206                                 break;
5207                         }
5208                         card->rx.b_element =
5209                                 &card->qdio.in_q->bufs[card->rx.b_index]
5210                                 .buffer->element[0];
5211                         card->rx.e_offset = 0;
5212                 }
5213
5214                 while (card->rx.b_count) {
5215                         buffer = &card->qdio.in_q->bufs[card->rx.b_index];
5216                         if (!(card->rx.qdio_err &&
5217                             qeth_check_qdio_errors(card, buffer->buffer,
5218                             card->rx.qdio_err, "qinerr")))
5219                                 work_done +=
5220                                         card->discipline->process_rx_buffer(
5221                                                 card, new_budget, &done);
5222                         else
5223                                 done = 1;
5224
5225                         if (done) {
5226                                 QETH_CARD_STAT_INC(card, rx_bufs);
5227                                 qeth_put_buffer_pool_entry(card,
5228                                         buffer->pool_entry);
5229                                 qeth_queue_input_buffer(card, card->rx.b_index);
5230                                 card->rx.b_count--;
5231                                 if (card->rx.b_count) {
5232                                         card->rx.b_index =
5233                                                 QDIO_BUFNR(card->rx.b_index + 1);
5234                                         card->rx.b_element =
5235                                                 &card->qdio.in_q
5236                                                 ->bufs[card->rx.b_index]
5237                                                 .buffer->element[0];
5238                                         card->rx.e_offset = 0;
5239                                 }
5240                         }
5241
5242                         if (work_done >= budget)
5243                                 goto out;
5244                         else
5245                                 new_budget = budget - work_done;
5246                 }
5247         }
5248
5249         if (napi_complete_done(napi, work_done) &&
5250             qdio_start_irq(CARD_DDEV(card), 0))
5251                 napi_schedule(napi);
5252 out:
5253         return work_done;
5254 }
5255 EXPORT_SYMBOL_GPL(qeth_poll);
5256
5257 static void qeth_iqd_tx_complete(struct qeth_qdio_out_q *queue,
5258                                  unsigned int bidx, bool error, int budget)
5259 {
5260         struct qeth_qdio_out_buffer *buffer = queue->bufs[bidx];
5261         u8 sflags = buffer->buffer->element[15].sflags;
5262         struct qeth_card *card = queue->card;
5263
5264         if (queue->bufstates && (queue->bufstates[bidx].flags &
5265                                  QDIO_OUTBUF_STATE_FLAG_PENDING)) {
5266                 WARN_ON_ONCE(card->options.cq != QETH_CQ_ENABLED);
5267
5268                 if (atomic_cmpxchg(&buffer->state, QETH_QDIO_BUF_PRIMED,
5269                                                    QETH_QDIO_BUF_PENDING) ==
5270                     QETH_QDIO_BUF_PRIMED)
5271                         qeth_notify_skbs(queue, buffer, TX_NOTIFY_PENDING);
5272
5273                 QETH_CARD_TEXT_(card, 5, "pel%u", bidx);
5274
5275                 /* prepare the queue slot for re-use: */
5276                 qeth_scrub_qdio_buffer(buffer->buffer, queue->max_elements);
5277                 if (qeth_init_qdio_out_buf(queue, bidx)) {
5278                         QETH_CARD_TEXT(card, 2, "outofbuf");
5279                         qeth_schedule_recovery(card);
5280                 }
5281
5282                 return;
5283         }
5284
5285         if (card->options.cq == QETH_CQ_ENABLED)
5286                 qeth_notify_skbs(queue, buffer,
5287                                  qeth_compute_cq_notification(sflags, 0));
5288         qeth_clear_output_buffer(queue, buffer, error, budget);
5289 }
5290
5291 static int qeth_tx_poll(struct napi_struct *napi, int budget)
5292 {
5293         struct qeth_qdio_out_q *queue = qeth_napi_to_out_queue(napi);
5294         unsigned int queue_no = queue->queue_no;
5295         struct qeth_card *card = queue->card;
5296         struct net_device *dev = card->dev;
5297         unsigned int work_done = 0;
5298         struct netdev_queue *txq;
5299
5300         txq = netdev_get_tx_queue(dev, qeth_iqd_translate_txq(dev, queue_no));
5301
5302         while (1) {
5303                 unsigned int start, error, i;
5304                 unsigned int packets = 0;
5305                 unsigned int bytes = 0;
5306                 int completed;
5307
5308                 if (qeth_out_queue_is_empty(queue)) {
5309                         napi_complete(napi);
5310                         return 0;
5311                 }
5312
5313                 /* Give the CPU a breather: */
5314                 if (work_done >= QDIO_MAX_BUFFERS_PER_Q) {
5315                         QETH_TXQ_STAT_INC(queue, completion_yield);
5316                         if (napi_complete_done(napi, 0))
5317                                 napi_schedule(napi);
5318                         return 0;
5319                 }
5320
5321                 completed = qdio_inspect_queue(CARD_DDEV(card), queue_no, false,
5322                                                &start, &error);
5323                 if (completed <= 0) {
5324                         /* Ensure we see TX completion for pending work: */
5325                         if (napi_complete_done(napi, 0))
5326                                 qeth_tx_arm_timer(queue);
5327                         return 0;
5328                 }
5329
5330                 for (i = start; i < start + completed; i++) {
5331                         struct qeth_qdio_out_buffer *buffer;
5332                         unsigned int bidx = QDIO_BUFNR(i);
5333
5334                         buffer = queue->bufs[bidx];
5335                         packets += skb_queue_len(&buffer->skb_list);
5336                         bytes += buffer->bytes;
5337
5338                         qeth_handle_send_error(card, buffer, error);
5339                         qeth_iqd_tx_complete(queue, bidx, error, budget);
5340                         qeth_cleanup_handled_pending(queue, bidx, false);
5341                 }
5342
5343                 netdev_tx_completed_queue(txq, packets, bytes);
5344                 atomic_sub(completed, &queue->used_buffers);
5345                 work_done += completed;
5346
5347                 /* xmit may have observed the full-condition, but not yet
5348                  * stopped the txq. In which case the code below won't trigger.
5349                  * So before returning, xmit will re-check the txq's fill level
5350                  * and wake it up if needed.
5351                  */
5352                 if (netif_tx_queue_stopped(txq) &&
5353                     !qeth_out_queue_is_full(queue))
5354                         netif_tx_wake_queue(txq);
5355         }
5356 }
5357
5358 static int qeth_setassparms_inspect_rc(struct qeth_ipa_cmd *cmd)
5359 {
5360         if (!cmd->hdr.return_code)
5361                 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
5362         return cmd->hdr.return_code;
5363 }
5364
5365 static int qeth_setassparms_get_caps_cb(struct qeth_card *card,
5366                                         struct qeth_reply *reply,
5367                                         unsigned long data)
5368 {
5369         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5370         struct qeth_ipa_caps *caps = reply->param;
5371
5372         if (qeth_setassparms_inspect_rc(cmd))
5373                 return -EIO;
5374
5375         caps->supported = cmd->data.setassparms.data.caps.supported;
5376         caps->enabled = cmd->data.setassparms.data.caps.enabled;
5377         return 0;
5378 }
5379
5380 int qeth_setassparms_cb(struct qeth_card *card,
5381                         struct qeth_reply *reply, unsigned long data)
5382 {
5383         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5384
5385         QETH_CARD_TEXT(card, 4, "defadpcb");
5386
5387         if (cmd->hdr.return_code)
5388                 return -EIO;
5389
5390         cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
5391         if (cmd->hdr.prot_version == QETH_PROT_IPV4)
5392                 card->options.ipa4.enabled_funcs = cmd->hdr.ipa_enabled;
5393         if (cmd->hdr.prot_version == QETH_PROT_IPV6)
5394                 card->options.ipa6.enabled_funcs = cmd->hdr.ipa_enabled;
5395         return 0;
5396 }
5397 EXPORT_SYMBOL_GPL(qeth_setassparms_cb);
5398
5399 struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card,
5400                                                  enum qeth_ipa_funcs ipa_func,
5401                                                  u16 cmd_code,
5402                                                  unsigned int data_length,
5403                                                  enum qeth_prot_versions prot)
5404 {
5405         struct qeth_ipacmd_setassparms *setassparms;
5406         struct qeth_ipacmd_setassparms_hdr *hdr;
5407         struct qeth_cmd_buffer *iob;
5408
5409         QETH_CARD_TEXT(card, 4, "getasscm");
5410         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETASSPARMS, prot,
5411                                  data_length +
5412                                  offsetof(struct qeth_ipacmd_setassparms,
5413                                           data));
5414         if (!iob)
5415                 return NULL;
5416
5417         setassparms = &__ipa_cmd(iob)->data.setassparms;
5418         setassparms->assist_no = ipa_func;
5419
5420         hdr = &setassparms->hdr;
5421         hdr->length = sizeof(*hdr) + data_length;
5422         hdr->command_code = cmd_code;
5423         return iob;
5424 }
5425 EXPORT_SYMBOL_GPL(qeth_get_setassparms_cmd);
5426
5427 int qeth_send_simple_setassparms_prot(struct qeth_card *card,
5428                                       enum qeth_ipa_funcs ipa_func,
5429                                       u16 cmd_code, u32 *data,
5430                                       enum qeth_prot_versions prot)
5431 {
5432         unsigned int length = data ? SETASS_DATA_SIZEOF(flags_32bit) : 0;
5433         struct qeth_cmd_buffer *iob;
5434
5435         QETH_CARD_TEXT_(card, 4, "simassp%i", prot);
5436         iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code, length, prot);
5437         if (!iob)
5438                 return -ENOMEM;
5439
5440         if (data)
5441                 __ipa_cmd(iob)->data.setassparms.data.flags_32bit = *data;
5442         return qeth_send_ipa_cmd(card, iob, qeth_setassparms_cb, NULL);
5443 }
5444 EXPORT_SYMBOL_GPL(qeth_send_simple_setassparms_prot);
5445
5446 static void qeth_unregister_dbf_views(void)
5447 {
5448         int x;
5449         for (x = 0; x < QETH_DBF_INFOS; x++) {
5450                 debug_unregister(qeth_dbf[x].id);
5451                 qeth_dbf[x].id = NULL;
5452         }
5453 }
5454
5455 void qeth_dbf_longtext(debug_info_t *id, int level, char *fmt, ...)
5456 {
5457         char dbf_txt_buf[32];
5458         va_list args;
5459
5460         if (!debug_level_enabled(id, level))
5461                 return;
5462         va_start(args, fmt);
5463         vsnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
5464         va_end(args);
5465         debug_text_event(id, level, dbf_txt_buf);
5466 }
5467 EXPORT_SYMBOL_GPL(qeth_dbf_longtext);
5468
5469 static int qeth_register_dbf_views(void)
5470 {
5471         int ret;
5472         int x;
5473
5474         for (x = 0; x < QETH_DBF_INFOS; x++) {
5475                 /* register the areas */
5476                 qeth_dbf[x].id = debug_register(qeth_dbf[x].name,
5477                                                 qeth_dbf[x].pages,
5478                                                 qeth_dbf[x].areas,
5479                                                 qeth_dbf[x].len);
5480                 if (qeth_dbf[x].id == NULL) {
5481                         qeth_unregister_dbf_views();
5482                         return -ENOMEM;
5483                 }
5484
5485                 /* register a view */
5486                 ret = debug_register_view(qeth_dbf[x].id, qeth_dbf[x].view);
5487                 if (ret) {
5488                         qeth_unregister_dbf_views();
5489                         return ret;
5490                 }
5491
5492                 /* set a passing level */
5493                 debug_set_level(qeth_dbf[x].id, qeth_dbf[x].level);
5494         }
5495
5496         return 0;
5497 }
5498
5499 static DEFINE_MUTEX(qeth_mod_mutex);    /* for synchronized module loading */
5500
5501 int qeth_core_load_discipline(struct qeth_card *card,
5502                 enum qeth_discipline_id discipline)
5503 {
5504         mutex_lock(&qeth_mod_mutex);
5505         switch (discipline) {
5506         case QETH_DISCIPLINE_LAYER3:
5507                 card->discipline = try_then_request_module(
5508                         symbol_get(qeth_l3_discipline), "qeth_l3");
5509                 break;
5510         case QETH_DISCIPLINE_LAYER2:
5511                 card->discipline = try_then_request_module(
5512                         symbol_get(qeth_l2_discipline), "qeth_l2");
5513                 break;
5514         default:
5515                 break;
5516         }
5517         mutex_unlock(&qeth_mod_mutex);
5518
5519         if (!card->discipline) {
5520                 dev_err(&card->gdev->dev, "There is no kernel module to "
5521                         "support discipline %d\n", discipline);
5522                 return -EINVAL;
5523         }
5524
5525         card->options.layer = discipline;
5526         return 0;
5527 }
5528
5529 void qeth_core_free_discipline(struct qeth_card *card)
5530 {
5531         if (IS_LAYER2(card))
5532                 symbol_put(qeth_l2_discipline);
5533         else
5534                 symbol_put(qeth_l3_discipline);
5535         card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
5536         card->discipline = NULL;
5537 }
5538
5539 const struct device_type qeth_generic_devtype = {
5540         .name = "qeth_generic",
5541         .groups = qeth_generic_attr_groups,
5542 };
5543 EXPORT_SYMBOL_GPL(qeth_generic_devtype);
5544
5545 static const struct device_type qeth_osn_devtype = {
5546         .name = "qeth_osn",
5547         .groups = qeth_osn_attr_groups,
5548 };
5549
5550 #define DBF_NAME_LEN    20
5551
5552 struct qeth_dbf_entry {
5553         char dbf_name[DBF_NAME_LEN];
5554         debug_info_t *dbf_info;
5555         struct list_head dbf_list;
5556 };
5557
5558 static LIST_HEAD(qeth_dbf_list);
5559 static DEFINE_MUTEX(qeth_dbf_list_mutex);
5560
5561 static debug_info_t *qeth_get_dbf_entry(char *name)
5562 {
5563         struct qeth_dbf_entry *entry;
5564         debug_info_t *rc = NULL;
5565
5566         mutex_lock(&qeth_dbf_list_mutex);
5567         list_for_each_entry(entry, &qeth_dbf_list, dbf_list) {
5568                 if (strcmp(entry->dbf_name, name) == 0) {
5569                         rc = entry->dbf_info;
5570                         break;
5571                 }
5572         }
5573         mutex_unlock(&qeth_dbf_list_mutex);
5574         return rc;
5575 }
5576
5577 static int qeth_add_dbf_entry(struct qeth_card *card, char *name)
5578 {
5579         struct qeth_dbf_entry *new_entry;
5580
5581         card->debug = debug_register(name, 2, 1, 8);
5582         if (!card->debug) {
5583                 QETH_DBF_TEXT_(SETUP, 2, "%s", "qcdbf");
5584                 goto err;
5585         }
5586         if (debug_register_view(card->debug, &debug_hex_ascii_view))
5587                 goto err_dbg;
5588         new_entry = kzalloc(sizeof(struct qeth_dbf_entry), GFP_KERNEL);
5589         if (!new_entry)
5590                 goto err_dbg;
5591         strncpy(new_entry->dbf_name, name, DBF_NAME_LEN);
5592         new_entry->dbf_info = card->debug;
5593         mutex_lock(&qeth_dbf_list_mutex);
5594         list_add(&new_entry->dbf_list, &qeth_dbf_list);
5595         mutex_unlock(&qeth_dbf_list_mutex);
5596
5597         return 0;
5598
5599 err_dbg:
5600         debug_unregister(card->debug);
5601 err:
5602         return -ENOMEM;
5603 }
5604
5605 static void qeth_clear_dbf_list(void)
5606 {
5607         struct qeth_dbf_entry *entry, *tmp;
5608
5609         mutex_lock(&qeth_dbf_list_mutex);
5610         list_for_each_entry_safe(entry, tmp, &qeth_dbf_list, dbf_list) {
5611                 list_del(&entry->dbf_list);
5612                 debug_unregister(entry->dbf_info);
5613                 kfree(entry);
5614         }
5615         mutex_unlock(&qeth_dbf_list_mutex);
5616 }
5617
5618 static struct net_device *qeth_alloc_netdev(struct qeth_card *card)
5619 {
5620         struct net_device *dev;
5621
5622         switch (card->info.type) {
5623         case QETH_CARD_TYPE_IQD:
5624                 dev = alloc_netdev_mqs(0, "hsi%d", NET_NAME_UNKNOWN,
5625                                        ether_setup, QETH_MAX_QUEUES, 1);
5626                 break;
5627         case QETH_CARD_TYPE_OSM:
5628                 dev = alloc_etherdev(0);
5629                 break;
5630         case QETH_CARD_TYPE_OSN:
5631                 dev = alloc_netdev(0, "osn%d", NET_NAME_UNKNOWN, ether_setup);
5632                 break;
5633         default:
5634                 dev = alloc_etherdev_mqs(0, QETH_MAX_QUEUES, 1);
5635         }
5636
5637         if (!dev)
5638                 return NULL;
5639
5640         dev->ml_priv = card;
5641         dev->watchdog_timeo = QETH_TX_TIMEOUT;
5642         dev->min_mtu = IS_OSN(card) ? 64 : 576;
5643          /* initialized when device first goes online: */
5644         dev->max_mtu = 0;
5645         dev->mtu = 0;
5646         SET_NETDEV_DEV(dev, &card->gdev->dev);
5647         netif_carrier_off(dev);
5648
5649         if (IS_OSN(card)) {
5650                 dev->ethtool_ops = &qeth_osn_ethtool_ops;
5651         } else {
5652                 dev->ethtool_ops = &qeth_ethtool_ops;
5653                 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
5654                 dev->hw_features |= NETIF_F_SG;
5655                 dev->vlan_features |= NETIF_F_SG;
5656                 if (IS_IQD(card)) {
5657                         dev->features |= NETIF_F_SG;
5658                         if (netif_set_real_num_tx_queues(dev,
5659                                                          QETH_IQD_MIN_TXQ)) {
5660                                 free_netdev(dev);
5661                                 return NULL;
5662                         }
5663                 }
5664         }
5665
5666         return dev;
5667 }
5668
5669 struct net_device *qeth_clone_netdev(struct net_device *orig)
5670 {
5671         struct net_device *clone = qeth_alloc_netdev(orig->ml_priv);
5672
5673         if (!clone)
5674                 return NULL;
5675
5676         clone->dev_port = orig->dev_port;
5677         return clone;
5678 }
5679
5680 static int qeth_core_probe_device(struct ccwgroup_device *gdev)
5681 {
5682         struct qeth_card *card;
5683         struct device *dev;
5684         int rc;
5685         enum qeth_discipline_id enforced_disc;
5686         char dbf_name[DBF_NAME_LEN];
5687
5688         QETH_DBF_TEXT(SETUP, 2, "probedev");
5689
5690         dev = &gdev->dev;
5691         if (!get_device(dev))
5692                 return -ENODEV;
5693
5694         QETH_DBF_TEXT_(SETUP, 2, "%s", dev_name(&gdev->dev));
5695
5696         card = qeth_alloc_card(gdev);
5697         if (!card) {
5698                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM);
5699                 rc = -ENOMEM;
5700                 goto err_dev;
5701         }
5702
5703         snprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
5704                 dev_name(&gdev->dev));
5705         card->debug = qeth_get_dbf_entry(dbf_name);
5706         if (!card->debug) {
5707                 rc = qeth_add_dbf_entry(card, dbf_name);
5708                 if (rc)
5709                         goto err_card;
5710         }
5711
5712         qeth_setup_card(card);
5713         card->dev = qeth_alloc_netdev(card);
5714         if (!card->dev) {
5715                 rc = -ENOMEM;
5716                 goto err_card;
5717         }
5718
5719         card->qdio.no_out_queues = card->dev->num_tx_queues;
5720         rc = qeth_update_from_chp_desc(card);
5721         if (rc)
5722                 goto err_chp_desc;
5723         qeth_determine_capabilities(card);
5724         qeth_set_blkt_defaults(card);
5725
5726         enforced_disc = qeth_enforce_discipline(card);
5727         switch (enforced_disc) {
5728         case QETH_DISCIPLINE_UNDETERMINED:
5729                 gdev->dev.type = &qeth_generic_devtype;
5730                 break;
5731         default:
5732                 card->info.layer_enforced = true;
5733                 rc = qeth_core_load_discipline(card, enforced_disc);
5734                 if (rc)
5735                         goto err_load;
5736
5737                 gdev->dev.type = IS_OSN(card) ? &qeth_osn_devtype :
5738                                                 card->discipline->devtype;
5739                 rc = card->discipline->setup(card->gdev);
5740                 if (rc)
5741                         goto err_disc;
5742                 break;
5743         }
5744
5745         return 0;
5746
5747 err_disc:
5748         qeth_core_free_discipline(card);
5749 err_load:
5750 err_chp_desc:
5751         free_netdev(card->dev);
5752 err_card:
5753         qeth_core_free_card(card);
5754 err_dev:
5755         put_device(dev);
5756         return rc;
5757 }
5758
5759 static void qeth_core_remove_device(struct ccwgroup_device *gdev)
5760 {
5761         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5762
5763         QETH_CARD_TEXT(card, 2, "removedv");
5764
5765         if (card->discipline) {
5766                 card->discipline->remove(gdev);
5767                 qeth_core_free_discipline(card);
5768         }
5769
5770         qeth_free_qdio_queues(card);
5771
5772         free_netdev(card->dev);
5773         qeth_core_free_card(card);
5774         put_device(&gdev->dev);
5775 }
5776
5777 static int qeth_core_set_online(struct ccwgroup_device *gdev)
5778 {
5779         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5780         int rc = 0;
5781         enum qeth_discipline_id def_discipline;
5782
5783         if (!card->discipline) {
5784                 def_discipline = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
5785                                                 QETH_DISCIPLINE_LAYER2;
5786                 rc = qeth_core_load_discipline(card, def_discipline);
5787                 if (rc)
5788                         goto err;
5789                 rc = card->discipline->setup(card->gdev);
5790                 if (rc) {
5791                         qeth_core_free_discipline(card);
5792                         goto err;
5793                 }
5794         }
5795         rc = card->discipline->set_online(gdev);
5796 err:
5797         return rc;
5798 }
5799
5800 static int qeth_core_set_offline(struct ccwgroup_device *gdev)
5801 {
5802         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5803         return card->discipline->set_offline(gdev);
5804 }
5805
5806 static void qeth_core_shutdown(struct ccwgroup_device *gdev)
5807 {
5808         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5809         qeth_set_allowed_threads(card, 0, 1);
5810         if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
5811                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
5812         qeth_qdio_clear_card(card, 0);
5813         qeth_drain_output_queues(card);
5814         qdio_free(CARD_DDEV(card));
5815 }
5816
5817 static int qeth_suspend(struct ccwgroup_device *gdev)
5818 {
5819         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5820
5821         qeth_set_allowed_threads(card, 0, 1);
5822         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
5823         if (gdev->state == CCWGROUP_OFFLINE)
5824                 return 0;
5825
5826         card->discipline->set_offline(gdev);
5827         return 0;
5828 }
5829
5830 static int qeth_resume(struct ccwgroup_device *gdev)
5831 {
5832         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5833         int rc;
5834
5835         rc = card->discipline->set_online(gdev);
5836
5837         qeth_set_allowed_threads(card, 0xffffffff, 0);
5838         if (rc)
5839                 dev_warn(&card->gdev->dev, "The qeth device driver failed to recover an error on the device\n");
5840         return rc;
5841 }
5842
5843 static ssize_t group_store(struct device_driver *ddrv, const char *buf,
5844                            size_t count)
5845 {
5846         int err;
5847
5848         err = ccwgroup_create_dev(qeth_core_root_dev, to_ccwgroupdrv(ddrv), 3,
5849                                   buf);
5850
5851         return err ? err : count;
5852 }
5853 static DRIVER_ATTR_WO(group);
5854
5855 static struct attribute *qeth_drv_attrs[] = {
5856         &driver_attr_group.attr,
5857         NULL,
5858 };
5859 static struct attribute_group qeth_drv_attr_group = {
5860         .attrs = qeth_drv_attrs,
5861 };
5862 static const struct attribute_group *qeth_drv_attr_groups[] = {
5863         &qeth_drv_attr_group,
5864         NULL,
5865 };
5866
5867 static struct ccwgroup_driver qeth_core_ccwgroup_driver = {
5868         .driver = {
5869                 .groups = qeth_drv_attr_groups,
5870                 .owner = THIS_MODULE,
5871                 .name = "qeth",
5872         },
5873         .ccw_driver = &qeth_ccw_driver,
5874         .setup = qeth_core_probe_device,
5875         .remove = qeth_core_remove_device,
5876         .set_online = qeth_core_set_online,
5877         .set_offline = qeth_core_set_offline,
5878         .shutdown = qeth_core_shutdown,
5879         .prepare = NULL,
5880         .complete = NULL,
5881         .freeze = qeth_suspend,
5882         .thaw = qeth_resume,
5883         .restore = qeth_resume,
5884 };
5885
5886 struct qeth_card *qeth_get_card_by_busid(char *bus_id)
5887 {
5888         struct ccwgroup_device *gdev;
5889         struct qeth_card *card;
5890
5891         gdev = get_ccwgroupdev_by_busid(&qeth_core_ccwgroup_driver, bus_id);
5892         if (!gdev)
5893                 return NULL;
5894
5895         card = dev_get_drvdata(&gdev->dev);
5896         put_device(&gdev->dev);
5897         return card;
5898 }
5899 EXPORT_SYMBOL_GPL(qeth_get_card_by_busid);
5900
5901 int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
5902 {
5903         struct qeth_card *card = dev->ml_priv;
5904         struct mii_ioctl_data *mii_data;
5905         int rc = 0;
5906
5907         if (!card)
5908                 return -ENODEV;
5909
5910         switch (cmd) {
5911         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
5912                 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
5913                 break;
5914         case SIOC_QETH_GET_CARD_TYPE:
5915                 if ((IS_OSD(card) || IS_OSM(card) || IS_OSX(card)) &&
5916                     !IS_VM_NIC(card))
5917                         return 1;
5918                 return 0;
5919         case SIOCGMIIPHY:
5920                 mii_data = if_mii(rq);
5921                 mii_data->phy_id = 0;
5922                 break;
5923         case SIOCGMIIREG:
5924                 mii_data = if_mii(rq);
5925                 if (mii_data->phy_id != 0)
5926                         rc = -EINVAL;
5927                 else
5928                         mii_data->val_out = qeth_mdio_read(dev,
5929                                 mii_data->phy_id, mii_data->reg_num);
5930                 break;
5931         case SIOC_QETH_QUERY_OAT:
5932                 rc = qeth_query_oat_command(card, rq->ifr_ifru.ifru_data);
5933                 break;
5934         default:
5935                 if (card->discipline->do_ioctl)
5936                         rc = card->discipline->do_ioctl(dev, rq, cmd);
5937                 else
5938                         rc = -EOPNOTSUPP;
5939         }
5940         if (rc)
5941                 QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
5942         return rc;
5943 }
5944 EXPORT_SYMBOL_GPL(qeth_do_ioctl);
5945
5946 static int qeth_start_csum_cb(struct qeth_card *card, struct qeth_reply *reply,
5947                               unsigned long data)
5948 {
5949         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5950         u32 *features = reply->param;
5951
5952         if (qeth_setassparms_inspect_rc(cmd))
5953                 return -EIO;
5954
5955         *features = cmd->data.setassparms.data.flags_32bit;
5956         return 0;
5957 }
5958
5959 static int qeth_set_csum_off(struct qeth_card *card, enum qeth_ipa_funcs cstype,
5960                              enum qeth_prot_versions prot)
5961 {
5962         return qeth_send_simple_setassparms_prot(card, cstype, IPA_CMD_ASS_STOP,
5963                                                  NULL, prot);
5964 }
5965
5966 static int qeth_set_csum_on(struct qeth_card *card, enum qeth_ipa_funcs cstype,
5967                             enum qeth_prot_versions prot)
5968 {
5969         u32 required_features = QETH_IPA_CHECKSUM_UDP | QETH_IPA_CHECKSUM_TCP;
5970         struct qeth_cmd_buffer *iob;
5971         struct qeth_ipa_caps caps;
5972         u32 features;
5973         int rc;
5974
5975         /* some L3 HW requires combined L3+L4 csum offload: */
5976         if (IS_LAYER3(card) && prot == QETH_PROT_IPV4 &&
5977             cstype == IPA_OUTBOUND_CHECKSUM)
5978                 required_features |= QETH_IPA_CHECKSUM_IP_HDR;
5979
5980         iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_START, 0,
5981                                        prot);
5982         if (!iob)
5983                 return -ENOMEM;
5984
5985         rc = qeth_send_ipa_cmd(card, iob, qeth_start_csum_cb, &features);
5986         if (rc)
5987                 return rc;
5988
5989         if ((required_features & features) != required_features) {
5990                 qeth_set_csum_off(card, cstype, prot);
5991                 return -EOPNOTSUPP;
5992         }
5993
5994         iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_ENABLE,
5995                                        SETASS_DATA_SIZEOF(flags_32bit),
5996                                        prot);
5997         if (!iob) {
5998                 qeth_set_csum_off(card, cstype, prot);
5999                 return -ENOMEM;
6000         }
6001
6002         if (features & QETH_IPA_CHECKSUM_LP2LP)
6003                 required_features |= QETH_IPA_CHECKSUM_LP2LP;
6004         __ipa_cmd(iob)->data.setassparms.data.flags_32bit = required_features;
6005         rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6006         if (rc) {
6007                 qeth_set_csum_off(card, cstype, prot);
6008                 return rc;
6009         }
6010
6011         if (!qeth_ipa_caps_supported(&caps, required_features) ||
6012             !qeth_ipa_caps_enabled(&caps, required_features)) {
6013                 qeth_set_csum_off(card, cstype, prot);
6014                 return -EOPNOTSUPP;
6015         }
6016
6017         dev_info(&card->gdev->dev, "HW Checksumming (%sbound IPv%d) enabled\n",
6018                  cstype == IPA_INBOUND_CHECKSUM ? "in" : "out", prot);
6019         if (!qeth_ipa_caps_enabled(&caps, QETH_IPA_CHECKSUM_LP2LP) &&
6020             cstype == IPA_OUTBOUND_CHECKSUM)
6021                 dev_warn(&card->gdev->dev,
6022                          "Hardware checksumming is performed only if %s and its peer use different OSA Express 3 ports\n",
6023                          QETH_CARD_IFNAME(card));
6024         return 0;
6025 }
6026
6027 static int qeth_set_ipa_csum(struct qeth_card *card, bool on, int cstype,
6028                              enum qeth_prot_versions prot)
6029 {
6030         return on ? qeth_set_csum_on(card, cstype, prot) :
6031                     qeth_set_csum_off(card, cstype, prot);
6032 }
6033
6034 static int qeth_start_tso_cb(struct qeth_card *card, struct qeth_reply *reply,
6035                              unsigned long data)
6036 {
6037         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6038         struct qeth_tso_start_data *tso_data = reply->param;
6039
6040         if (qeth_setassparms_inspect_rc(cmd))
6041                 return -EIO;
6042
6043         tso_data->mss = cmd->data.setassparms.data.tso.mss;
6044         tso_data->supported = cmd->data.setassparms.data.tso.supported;
6045         return 0;
6046 }
6047
6048 static int qeth_set_tso_off(struct qeth_card *card,
6049                             enum qeth_prot_versions prot)
6050 {
6051         return qeth_send_simple_setassparms_prot(card, IPA_OUTBOUND_TSO,
6052                                                  IPA_CMD_ASS_STOP, NULL, prot);
6053 }
6054
6055 static int qeth_set_tso_on(struct qeth_card *card,
6056                            enum qeth_prot_versions prot)
6057 {
6058         struct qeth_tso_start_data tso_data;
6059         struct qeth_cmd_buffer *iob;
6060         struct qeth_ipa_caps caps;
6061         int rc;
6062
6063         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6064                                        IPA_CMD_ASS_START, 0, prot);
6065         if (!iob)
6066                 return -ENOMEM;
6067
6068         rc = qeth_send_ipa_cmd(card, iob, qeth_start_tso_cb, &tso_data);
6069         if (rc)
6070                 return rc;
6071
6072         if (!tso_data.mss || !(tso_data.supported & QETH_IPA_LARGE_SEND_TCP)) {
6073                 qeth_set_tso_off(card, prot);
6074                 return -EOPNOTSUPP;
6075         }
6076
6077         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6078                                        IPA_CMD_ASS_ENABLE,
6079                                        SETASS_DATA_SIZEOF(caps), prot);
6080         if (!iob) {
6081                 qeth_set_tso_off(card, prot);
6082                 return -ENOMEM;
6083         }
6084
6085         /* enable TSO capability */
6086         __ipa_cmd(iob)->data.setassparms.data.caps.enabled =
6087                 QETH_IPA_LARGE_SEND_TCP;
6088         rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6089         if (rc) {
6090                 qeth_set_tso_off(card, prot);
6091                 return rc;
6092         }
6093
6094         if (!qeth_ipa_caps_supported(&caps, QETH_IPA_LARGE_SEND_TCP) ||
6095             !qeth_ipa_caps_enabled(&caps, QETH_IPA_LARGE_SEND_TCP)) {
6096                 qeth_set_tso_off(card, prot);
6097                 return -EOPNOTSUPP;
6098         }
6099
6100         dev_info(&card->gdev->dev, "TSOv%u enabled (MSS: %u)\n", prot,
6101                  tso_data.mss);
6102         return 0;
6103 }
6104
6105 static int qeth_set_ipa_tso(struct qeth_card *card, bool on,
6106                             enum qeth_prot_versions prot)
6107 {
6108         return on ? qeth_set_tso_on(card, prot) : qeth_set_tso_off(card, prot);
6109 }
6110
6111 static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on)
6112 {
6113         int rc_ipv4 = (on) ? -EOPNOTSUPP : 0;
6114         int rc_ipv6;
6115
6116         if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
6117                 rc_ipv4 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6118                                             QETH_PROT_IPV4);
6119         if (!qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6120                 /* no/one Offload Assist available, so the rc is trivial */
6121                 return rc_ipv4;
6122
6123         rc_ipv6 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6124                                     QETH_PROT_IPV6);
6125
6126         if (on)
6127                 /* enable: success if any Assist is active */
6128                 return (rc_ipv6) ? rc_ipv4 : 0;
6129
6130         /* disable: failure if any Assist is still active */
6131         return (rc_ipv6) ? rc_ipv6 : rc_ipv4;
6132 }
6133
6134 /**
6135  * qeth_enable_hw_features() - (Re-)Enable HW functions for device features
6136  * @dev:        a net_device
6137  */
6138 void qeth_enable_hw_features(struct net_device *dev)
6139 {
6140         struct qeth_card *card = dev->ml_priv;
6141         netdev_features_t features;
6142
6143         features = dev->features;
6144         /* force-off any feature that might need an IPA sequence.
6145          * netdev_update_features() will restart them.
6146          */
6147         dev->features &= ~dev->hw_features;
6148         /* toggle VLAN filter, so that VIDs are re-programmed: */
6149         if (IS_LAYER2(card) && IS_VM_NIC(card)) {
6150                 dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
6151                 dev->wanted_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
6152         }
6153         netdev_update_features(dev);
6154         if (features != dev->features)
6155                 dev_warn(&card->gdev->dev,
6156                          "Device recovery failed to restore all offload features\n");
6157 }
6158 EXPORT_SYMBOL_GPL(qeth_enable_hw_features);
6159
6160 int qeth_set_features(struct net_device *dev, netdev_features_t features)
6161 {
6162         struct qeth_card *card = dev->ml_priv;
6163         netdev_features_t changed = dev->features ^ features;
6164         int rc = 0;
6165
6166         QETH_CARD_TEXT(card, 2, "setfeat");
6167         QETH_CARD_HEX(card, 2, &features, sizeof(features));
6168
6169         if ((changed & NETIF_F_IP_CSUM)) {
6170                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IP_CSUM,
6171                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV4);
6172                 if (rc)
6173                         changed ^= NETIF_F_IP_CSUM;
6174         }
6175         if (changed & NETIF_F_IPV6_CSUM) {
6176                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IPV6_CSUM,
6177                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV6);
6178                 if (rc)
6179                         changed ^= NETIF_F_IPV6_CSUM;
6180         }
6181         if (changed & NETIF_F_RXCSUM) {
6182                 rc = qeth_set_ipa_rx_csum(card, features & NETIF_F_RXCSUM);
6183                 if (rc)
6184                         changed ^= NETIF_F_RXCSUM;
6185         }
6186         if (changed & NETIF_F_TSO) {
6187                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO,
6188                                       QETH_PROT_IPV4);
6189                 if (rc)
6190                         changed ^= NETIF_F_TSO;
6191         }
6192         if (changed & NETIF_F_TSO6) {
6193                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO6,
6194                                       QETH_PROT_IPV6);
6195                 if (rc)
6196                         changed ^= NETIF_F_TSO6;
6197         }
6198
6199         /* everything changed successfully? */
6200         if ((dev->features ^ features) == changed)
6201                 return 0;
6202         /* something went wrong. save changed features and return error */
6203         dev->features ^= changed;
6204         return -EIO;
6205 }
6206 EXPORT_SYMBOL_GPL(qeth_set_features);
6207
6208 netdev_features_t qeth_fix_features(struct net_device *dev,
6209                                     netdev_features_t features)
6210 {
6211         struct qeth_card *card = dev->ml_priv;
6212
6213         QETH_CARD_TEXT(card, 2, "fixfeat");
6214         if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM))
6215                 features &= ~NETIF_F_IP_CSUM;
6216         if (!qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6))
6217                 features &= ~NETIF_F_IPV6_CSUM;
6218         if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM) &&
6219             !qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6220                 features &= ~NETIF_F_RXCSUM;
6221         if (!qeth_is_supported(card, IPA_OUTBOUND_TSO))
6222                 features &= ~NETIF_F_TSO;
6223         if (!qeth_is_supported6(card, IPA_OUTBOUND_TSO))
6224                 features &= ~NETIF_F_TSO6;
6225
6226         QETH_CARD_HEX(card, 2, &features, sizeof(features));
6227         return features;
6228 }
6229 EXPORT_SYMBOL_GPL(qeth_fix_features);
6230
6231 netdev_features_t qeth_features_check(struct sk_buff *skb,
6232                                       struct net_device *dev,
6233                                       netdev_features_t features)
6234 {
6235         /* GSO segmentation builds skbs with
6236          *      a (small) linear part for the headers, and
6237          *      page frags for the data.
6238          * Compared to a linear skb, the header-only part consumes an
6239          * additional buffer element. This reduces buffer utilization, and
6240          * hurts throughput. So compress small segments into one element.
6241          */
6242         if (netif_needs_gso(skb, features)) {
6243                 /* match skb_segment(): */
6244                 unsigned int doffset = skb->data - skb_mac_header(skb);
6245                 unsigned int hsize = skb_shinfo(skb)->gso_size;
6246                 unsigned int hroom = skb_headroom(skb);
6247
6248                 /* linearize only if resulting skb allocations are order-0: */
6249                 if (SKB_DATA_ALIGN(hroom + doffset + hsize) <= SKB_MAX_HEAD(0))
6250                         features &= ~NETIF_F_SG;
6251         }
6252
6253         return vlan_features_check(skb, features);
6254 }
6255 EXPORT_SYMBOL_GPL(qeth_features_check);
6256
6257 void qeth_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
6258 {
6259         struct qeth_card *card = dev->ml_priv;
6260         struct qeth_qdio_out_q *queue;
6261         unsigned int i;
6262
6263         QETH_CARD_TEXT(card, 5, "getstat");
6264
6265         stats->rx_packets = card->stats.rx_packets;
6266         stats->rx_bytes = card->stats.rx_bytes;
6267         stats->rx_errors = card->stats.rx_length_errors +
6268                            card->stats.rx_frame_errors +
6269                            card->stats.rx_fifo_errors;
6270         stats->rx_dropped = card->stats.rx_dropped_nomem +
6271                             card->stats.rx_dropped_notsupp;
6272         stats->multicast = card->stats.rx_multicast;
6273         stats->rx_length_errors = card->stats.rx_length_errors;
6274         stats->rx_frame_errors = card->stats.rx_frame_errors;
6275         stats->rx_fifo_errors = card->stats.rx_fifo_errors;
6276
6277         for (i = 0; i < card->qdio.no_out_queues; i++) {
6278                 queue = card->qdio.out_qs[i];
6279
6280                 stats->tx_packets += queue->stats.tx_packets;
6281                 stats->tx_bytes += queue->stats.tx_bytes;
6282                 stats->tx_errors += queue->stats.tx_errors;
6283                 stats->tx_dropped += queue->stats.tx_dropped;
6284         }
6285 }
6286 EXPORT_SYMBOL_GPL(qeth_get_stats64);
6287
6288 u16 qeth_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
6289                           u8 cast_type, struct net_device *sb_dev)
6290 {
6291         if (cast_type != RTN_UNICAST)
6292                 return QETH_IQD_MCAST_TXQ;
6293         return QETH_IQD_MIN_UCAST_TXQ;
6294 }
6295 EXPORT_SYMBOL_GPL(qeth_iqd_select_queue);
6296
6297 int qeth_open(struct net_device *dev)
6298 {
6299         struct qeth_card *card = dev->ml_priv;
6300
6301         QETH_CARD_TEXT(card, 4, "qethopen");
6302
6303         if (qdio_stop_irq(CARD_DDEV(card), 0) < 0)
6304                 return -EIO;
6305
6306         card->data.state = CH_STATE_UP;
6307         netif_tx_start_all_queues(dev);
6308
6309         napi_enable(&card->napi);
6310         local_bh_disable();
6311         napi_schedule(&card->napi);
6312         if (IS_IQD(card)) {
6313                 struct qeth_qdio_out_q *queue;
6314                 unsigned int i;
6315
6316                 qeth_for_each_output_queue(card, queue, i) {
6317                         netif_tx_napi_add(dev, &queue->napi, qeth_tx_poll,
6318                                           QETH_NAPI_WEIGHT);
6319                         napi_enable(&queue->napi);
6320                         napi_schedule(&queue->napi);
6321                 }
6322         }
6323         /* kick-start the NAPI softirq: */
6324         local_bh_enable();
6325         return 0;
6326 }
6327 EXPORT_SYMBOL_GPL(qeth_open);
6328
6329 int qeth_stop(struct net_device *dev)
6330 {
6331         struct qeth_card *card = dev->ml_priv;
6332
6333         QETH_CARD_TEXT(card, 4, "qethstop");
6334         if (IS_IQD(card)) {
6335                 struct qeth_qdio_out_q *queue;
6336                 unsigned int i;
6337
6338                 /* Quiesce the NAPI instances: */
6339                 qeth_for_each_output_queue(card, queue, i) {
6340                         napi_disable(&queue->napi);
6341                         del_timer_sync(&queue->timer);
6342                 }
6343
6344                 /* Stop .ndo_start_xmit, might still access queue->napi. */
6345                 netif_tx_disable(dev);
6346
6347                 /* Queues may get re-allocated, so remove the NAPIs here. */
6348                 qeth_for_each_output_queue(card, queue, i)
6349                         netif_napi_del(&queue->napi);
6350         } else {
6351                 netif_tx_disable(dev);
6352         }
6353
6354         napi_disable(&card->napi);
6355         return 0;
6356 }
6357 EXPORT_SYMBOL_GPL(qeth_stop);
6358
6359 static int __init qeth_core_init(void)
6360 {
6361         int rc;
6362
6363         pr_info("loading core functions\n");
6364
6365         rc = qeth_register_dbf_views();
6366         if (rc)
6367                 goto dbf_err;
6368         qeth_core_root_dev = root_device_register("qeth");
6369         rc = PTR_ERR_OR_ZERO(qeth_core_root_dev);
6370         if (rc)
6371                 goto register_err;
6372         qeth_core_header_cache =
6373                 kmem_cache_create("qeth_hdr", QETH_HDR_CACHE_OBJ_SIZE,
6374                                   roundup_pow_of_two(QETH_HDR_CACHE_OBJ_SIZE),
6375                                   0, NULL);
6376         if (!qeth_core_header_cache) {
6377                 rc = -ENOMEM;
6378                 goto slab_err;
6379         }
6380         qeth_qdio_outbuf_cache = kmem_cache_create("qeth_buf",
6381                         sizeof(struct qeth_qdio_out_buffer), 0, 0, NULL);
6382         if (!qeth_qdio_outbuf_cache) {
6383                 rc = -ENOMEM;
6384                 goto cqslab_err;
6385         }
6386         rc = ccw_driver_register(&qeth_ccw_driver);
6387         if (rc)
6388                 goto ccw_err;
6389         rc = ccwgroup_driver_register(&qeth_core_ccwgroup_driver);
6390         if (rc)
6391                 goto ccwgroup_err;
6392
6393         return 0;
6394
6395 ccwgroup_err:
6396         ccw_driver_unregister(&qeth_ccw_driver);
6397 ccw_err:
6398         kmem_cache_destroy(qeth_qdio_outbuf_cache);
6399 cqslab_err:
6400         kmem_cache_destroy(qeth_core_header_cache);
6401 slab_err:
6402         root_device_unregister(qeth_core_root_dev);
6403 register_err:
6404         qeth_unregister_dbf_views();
6405 dbf_err:
6406         pr_err("Initializing the qeth device driver failed\n");
6407         return rc;
6408 }
6409
6410 static void __exit qeth_core_exit(void)
6411 {
6412         qeth_clear_dbf_list();
6413         ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver);
6414         ccw_driver_unregister(&qeth_ccw_driver);
6415         kmem_cache_destroy(qeth_qdio_outbuf_cache);
6416         kmem_cache_destroy(qeth_core_header_cache);
6417         root_device_unregister(qeth_core_root_dev);
6418         qeth_unregister_dbf_views();
6419         pr_info("core functions removed\n");
6420 }
6421
6422 module_init(qeth_core_init);
6423 module_exit(qeth_core_exit);
6424 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
6425 MODULE_DESCRIPTION("qeth core functions");
6426 MODULE_LICENSE("GPL");