drivers/s390/net/qeth_core_main.c

   1 /*
   2  *    Copyright IBM Corp. 2007, 2009
   3  *    Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
   4  *               Frank Pavlic <fpavlic@de.ibm.com>,
   5  *               Thomas Spatzier <tspat@de.ibm.com>,
   6  *               Frank Blaschka <frank.blaschka@de.ibm.com>
   7  */
   8
   9 #define KMSG_COMPONENT "qeth"
  10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  11
  12 #include <linux/module.h>
  13 #include <linux/moduleparam.h>
  14 #include <linux/string.h>
  15 #include <linux/errno.h>
  16 #include <linux/kernel.h>
  17 #include <linux/ip.h>
  18 #include <linux/tcp.h>
  19 #include <linux/mii.h>
  20 #include <linux/kthread.h>
  21 #include <linux/slab.h>
  22 #include <linux/if_vlan.h>
  23 #include <linux/netdevice.h>
  24 #include <linux/netdev_features.h>
  25 #include <linux/skbuff.h>
  26 #include <linux/vmalloc.h>
  27
  28 #include <net/iucv/af_iucv.h>
  29 #include <net/dsfield.h>
  30
  31 #include <asm/ebcdic.h>
  32 #include <asm/chpid.h>
  33 #include <asm/io.h>
  34 #include <asm/sysinfo.h>
  35 #include <asm/compat.h>
  36
  37 #include "qeth_core.h"
  38
  39 struct qeth_dbf_info qeth_dbf[QETH_DBF_INFOS] = {
  40         /* define dbf - Name, Pages, Areas, Maxlen, Level, View, Handle */
  41         /*                   N  P  A    M  L  V                      H  */
  42         [QETH_DBF_SETUP] = {"qeth_setup",
  43                                 8, 1,   8, 5, &debug_hex_ascii_view, NULL},
  44         [QETH_DBF_MSG]   = {"qeth_msg", 8, 1, 11 * sizeof(long), 3,
  45                             &debug_sprintf_view, NULL},
  46         [QETH_DBF_CTRL]  = {"qeth_control",
  47                 8, 1, QETH_DBF_CTRL_LEN, 5, &debug_hex_ascii_view, NULL},
  48 };
  49 EXPORT_SYMBOL_GPL(qeth_dbf);
  50
  51 struct qeth_card_list_struct qeth_core_card_list;
  52 EXPORT_SYMBOL_GPL(qeth_core_card_list);
  53 struct kmem_cache *qeth_core_header_cache;
  54 EXPORT_SYMBOL_GPL(qeth_core_header_cache);
  55 static struct kmem_cache *qeth_qdio_outbuf_cache;
  56
  57 static struct device *qeth_core_root_dev;
  58 static unsigned int known_devices[][6] = QETH_MODELLIST_ARRAY;
  59 static struct lock_class_key qdio_out_skb_queue_key;
  60 static struct mutex qeth_mod_mutex;
  61
  62 static void qeth_send_control_data_cb(struct qeth_channel *,
  63                         struct qeth_cmd_buffer *);
  64 static int qeth_issue_next_read(struct qeth_card *);
  65 static struct qeth_cmd_buffer *qeth_get_buffer(struct qeth_channel *);
  66 static void qeth_setup_ccw(struct qeth_channel *, unsigned char *, __u32);
  67 static void qeth_free_buffer_pool(struct qeth_card *);
  68 static int qeth_qdio_establish(struct qeth_card *);
  69 static void qeth_free_qdio_buffers(struct qeth_card *);
  70 static void qeth_notify_skbs(struct qeth_qdio_out_q *queue,
  71                 struct qeth_qdio_out_buffer *buf,
  72                 enum iucv_tx_notify notification);
  73 static void qeth_release_skbs(struct qeth_qdio_out_buffer *buf);
  74 static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
  75                 struct qeth_qdio_out_buffer *buf,
  76                 enum qeth_qdio_buffer_states newbufstate);
  77 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *, int);
  78
  79 struct workqueue_struct *qeth_wq;
  80 EXPORT_SYMBOL_GPL(qeth_wq);
  81
  82 int qeth_card_hw_is_reachable(struct qeth_card *card)
  83 {
  84         return (card->state == CARD_STATE_SOFTSETUP) ||
  85                 (card->state == CARD_STATE_UP);
  86 }
  87 EXPORT_SYMBOL_GPL(qeth_card_hw_is_reachable);
  88
  89 static void qeth_close_dev_handler(struct work_struct *work)
  90 {
  91         struct qeth_card *card;
  92
  93         card = container_of(work, struct qeth_card, close_dev_work);
  94         QETH_CARD_TEXT(card, 2, "cldevhdl");
  95         rtnl_lock();
  96         dev_close(card->dev);
  97         rtnl_unlock();
  98         ccwgroup_set_offline(card->gdev);
  99 }
 100
 101 void qeth_close_dev(struct qeth_card *card)
 102 {
 103         QETH_CARD_TEXT(card, 2, "cldevsubm");
 104         queue_work(qeth_wq, &card->close_dev_work);
 105 }
 106 EXPORT_SYMBOL_GPL(qeth_close_dev);
 107
 108 static inline const char *qeth_get_cardname(struct qeth_card *card)
 109 {
 110         if (card->info.guestlan) {
 111                 switch (card->info.type) {
 112                 case QETH_CARD_TYPE_OSD:
 113                         return " Virtual NIC QDIO";
 114                 case QETH_CARD_TYPE_IQD:
 115                         return " Virtual NIC Hiper";
 116                 case QETH_CARD_TYPE_OSM:
 117                         return " Virtual NIC QDIO - OSM";
 118                 case QETH_CARD_TYPE_OSX:
 119                         return " Virtual NIC QDIO - OSX";
 120                 default:
 121                         return " unknown";
 122                 }
 123         } else {
 124                 switch (card->info.type) {
 125                 case QETH_CARD_TYPE_OSD:
 126                         return " OSD Express";
 127                 case QETH_CARD_TYPE_IQD:
 128                         return " HiperSockets";
 129                 case QETH_CARD_TYPE_OSN:
 130                         return " OSN QDIO";
 131                 case QETH_CARD_TYPE_OSM:
 132                         return " OSM QDIO";
 133                 case QETH_CARD_TYPE_OSX:
 134                         return " OSX QDIO";
 135                 default:
 136                         return " unknown";
 137                 }
 138         }
 139         return " n/a";
 140 }
 141
 142 /* max length to be returned: 14 */
 143 const char *qeth_get_cardname_short(struct qeth_card *card)
 144 {
 145         if (card->info.guestlan) {
 146                 switch (card->info.type) {
 147                 case QETH_CARD_TYPE_OSD:
 148                         return "Virt.NIC QDIO";
 149                 case QETH_CARD_TYPE_IQD:
 150                         return "Virt.NIC Hiper";
 151                 case QETH_CARD_TYPE_OSM:
 152                         return "Virt.NIC OSM";
 153                 case QETH_CARD_TYPE_OSX:
 154                         return "Virt.NIC OSX";
 155                 default:
 156                         return "unknown";
 157                 }
 158         } else {
 159                 switch (card->info.type) {
 160                 case QETH_CARD_TYPE_OSD:
 161                         switch (card->info.link_type) {
 162                         case QETH_LINK_TYPE_FAST_ETH:
 163                                 return "OSD_100";
 164                         case QETH_LINK_TYPE_HSTR:
 165                                 return "HSTR";
 166                         case QETH_LINK_TYPE_GBIT_ETH:
 167                                 return "OSD_1000";
 168                         case QETH_LINK_TYPE_10GBIT_ETH:
 169                                 return "OSD_10GIG";
 170                         case QETH_LINK_TYPE_LANE_ETH100:
 171                                 return "OSD_FE_LANE";
 172                         case QETH_LINK_TYPE_LANE_TR:
 173                                 return "OSD_TR_LANE";
 174                         case QETH_LINK_TYPE_LANE_ETH1000:
 175                                 return "OSD_GbE_LANE";
 176                         case QETH_LINK_TYPE_LANE:
 177                                 return "OSD_ATM_LANE";
 178                         default:
 179                                 return "OSD_Express";
 180                         }
 181                 case QETH_CARD_TYPE_IQD:
 182                         return "HiperSockets";
 183                 case QETH_CARD_TYPE_OSN:
 184                         return "OSN";
 185                 case QETH_CARD_TYPE_OSM:
 186                         return "OSM_1000";
 187                 case QETH_CARD_TYPE_OSX:
 188                         return "OSX_10GIG";
 189                 default:
 190                         return "unknown";
 191                 }
 192         }
 193         return "n/a";
 194 }
 195
 196 void qeth_set_recovery_task(struct qeth_card *card)
 197 {
 198         card->recovery_task = current;
 199 }
 200 EXPORT_SYMBOL_GPL(qeth_set_recovery_task);
 201
 202 void qeth_clear_recovery_task(struct qeth_card *card)
 203 {
 204         card->recovery_task = NULL;
 205 }
 206 EXPORT_SYMBOL_GPL(qeth_clear_recovery_task);
 207
 208 static bool qeth_is_recovery_task(const struct qeth_card *card)
 209 {
 210         return card->recovery_task == current;
 211 }
 212
 213 void qeth_set_allowed_threads(struct qeth_card *card, unsigned long threads,
 214                          int clear_start_mask)
 215 {
 216         unsigned long flags;
 217
 218         spin_lock_irqsave(&card->thread_mask_lock, flags);
 219         card->thread_allowed_mask = threads;
 220         if (clear_start_mask)
 221                 card->thread_start_mask &= threads;
 222         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 223         wake_up(&card->wait_q);
 224 }
 225 EXPORT_SYMBOL_GPL(qeth_set_allowed_threads);
 226
 227 int qeth_threads_running(struct qeth_card *card, unsigned long threads)
 228 {
 229         unsigned long flags;
 230         int rc = 0;
 231
 232         spin_lock_irqsave(&card->thread_mask_lock, flags);
 233         rc = (card->thread_running_mask & threads);
 234         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 235         return rc;
 236 }
 237 EXPORT_SYMBOL_GPL(qeth_threads_running);
 238
 239 int qeth_wait_for_threads(struct qeth_card *card, unsigned long threads)
 240 {
 241         if (qeth_is_recovery_task(card))
 242                 return 0;
 243         return wait_event_interruptible(card->wait_q,
 244                         qeth_threads_running(card, threads) == 0);
 245 }
 246 EXPORT_SYMBOL_GPL(qeth_wait_for_threads);
 247
 248 void qeth_clear_working_pool_list(struct qeth_card *card)
 249 {
 250         struct qeth_buffer_pool_entry *pool_entry, *tmp;
 251
 252         QETH_CARD_TEXT(card, 5, "clwrklst");
 253         list_for_each_entry_safe(pool_entry, tmp,
 254                             &card->qdio.in_buf_pool.entry_list, list){
 255                         list_del(&pool_entry->list);
 256         }
 257 }
 258 EXPORT_SYMBOL_GPL(qeth_clear_working_pool_list);
 259
 260 static int qeth_alloc_buffer_pool(struct qeth_card *card)
 261 {
 262         struct qeth_buffer_pool_entry *pool_entry;
 263         void *ptr;
 264         int i, j;
 265
 266         QETH_CARD_TEXT(card, 5, "alocpool");
 267         for (i = 0; i < card->qdio.init_pool.buf_count; ++i) {
 268                 pool_entry = kzalloc(sizeof(*pool_entry), GFP_KERNEL);
 269                 if (!pool_entry) {
 270                         qeth_free_buffer_pool(card);
 271                         return -ENOMEM;
 272                 }
 273                 for (j = 0; j < QETH_MAX_BUFFER_ELEMENTS(card); ++j) {
 274                         ptr = (void *) __get_free_page(GFP_KERNEL);
 275                         if (!ptr) {
 276                                 while (j > 0)
 277                                         free_page((unsigned long)
 278                                                   pool_entry->elements[--j]);
 279                                 kfree(pool_entry);
 280                                 qeth_free_buffer_pool(card);
 281                                 return -ENOMEM;
 282                         }
 283                         pool_entry->elements[j] = ptr;
 284                 }
 285                 list_add(&pool_entry->init_list,
 286                          &card->qdio.init_pool.entry_list);
 287         }
 288         return 0;
 289 }
 290
 291 int qeth_realloc_buffer_pool(struct qeth_card *card, int bufcnt)
 292 {
 293         QETH_CARD_TEXT(card, 2, "realcbp");
 294
 295         if ((card->state != CARD_STATE_DOWN) &&
 296             (card->state != CARD_STATE_RECOVER))
 297                 return -EPERM;
 298
 299         /* TODO: steel/add buffers from/to a running card's buffer pool (?) */
 300         qeth_clear_working_pool_list(card);
 301         qeth_free_buffer_pool(card);
 302         card->qdio.in_buf_pool.buf_count = bufcnt;
 303         card->qdio.init_pool.buf_count = bufcnt;
 304         return qeth_alloc_buffer_pool(card);
 305 }
 306 EXPORT_SYMBOL_GPL(qeth_realloc_buffer_pool);
 307
 308 static void qeth_free_qdio_queue(struct qeth_qdio_q *q)
 309 {
 310         if (!q)
 311                 return;
 312
 313         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
 314         kfree(q);
 315 }
 316
 317 static struct qeth_qdio_q *qeth_alloc_qdio_queue(void)
 318 {
 319         struct qeth_qdio_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
 320         int i;
 321
 322         if (!q)
 323                 return NULL;
 324
 325         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
 326                 kfree(q);
 327                 return NULL;
 328         }
 329
 330         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i)
 331                 q->bufs[i].buffer = q->qdio_bufs[i];
 332
 333         QETH_DBF_HEX(SETUP, 2, &q, sizeof(void *));
 334         return q;
 335 }
 336
 337 static inline int qeth_cq_init(struct qeth_card *card)
 338 {
 339         int rc;
 340
 341         if (card->options.cq == QETH_CQ_ENABLED) {
 342                 QETH_DBF_TEXT(SETUP, 2, "cqinit");
 343                 qdio_reset_buffers(card->qdio.c_q->qdio_bufs,
 344                                    QDIO_MAX_BUFFERS_PER_Q);
 345                 card->qdio.c_q->next_buf_to_init = 127;
 346                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT,
 347                              card->qdio.no_in_queues - 1, 0,
 348                              127);
 349                 if (rc) {
 350                         QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 351                         goto out;
 352                 }
 353         }
 354         rc = 0;
 355 out:
 356         return rc;
 357 }
 358
 359 static inline int qeth_alloc_cq(struct qeth_card *card)
 360 {
 361         int rc;
 362
 363         if (card->options.cq == QETH_CQ_ENABLED) {
 364                 int i;
 365                 struct qdio_outbuf_state *outbuf_states;
 366
 367                 QETH_DBF_TEXT(SETUP, 2, "cqon");
 368                 card->qdio.c_q = qeth_alloc_qdio_queue();
 369                 if (!card->qdio.c_q) {
 370                         rc = -1;
 371                         goto kmsg_out;
 372                 }
 373                 card->qdio.no_in_queues = 2;
 374                 card->qdio.out_bufstates =
 375                         kzalloc(card->qdio.no_out_queues *
 376                                 QDIO_MAX_BUFFERS_PER_Q *
 377                                 sizeof(struct qdio_outbuf_state), GFP_KERNEL);
 378                 outbuf_states = card->qdio.out_bufstates;
 379                 if (outbuf_states == NULL) {
 380                         rc = -1;
 381                         goto free_cq_out;
 382                 }
 383                 for (i = 0; i < card->qdio.no_out_queues; ++i) {
 384                         card->qdio.out_qs[i]->bufstates = outbuf_states;
 385                         outbuf_states += QDIO_MAX_BUFFERS_PER_Q;
 386                 }
 387         } else {
 388                 QETH_DBF_TEXT(SETUP, 2, "nocq");
 389                 card->qdio.c_q = NULL;
 390                 card->qdio.no_in_queues = 1;
 391         }
 392         QETH_DBF_TEXT_(SETUP, 2, "iqc%d", card->qdio.no_in_queues);
 393         rc = 0;
 394 out:
 395         return rc;
 396 free_cq_out:
 397         qeth_free_qdio_queue(card->qdio.c_q);
 398         card->qdio.c_q = NULL;
 399 kmsg_out:
 400         dev_err(&card->gdev->dev, "Failed to create completion queue\n");
 401         goto out;
 402 }
 403
 404 static inline void qeth_free_cq(struct qeth_card *card)
 405 {
 406         if (card->qdio.c_q) {
 407                 --card->qdio.no_in_queues;
 408                 qeth_free_qdio_queue(card->qdio.c_q);
 409                 card->qdio.c_q = NULL;
 410         }
 411         kfree(card->qdio.out_bufstates);
 412         card->qdio.out_bufstates = NULL;
 413 }
 414
 415 static inline enum iucv_tx_notify qeth_compute_cq_notification(int sbalf15,
 416         int delayed) {
 417         enum iucv_tx_notify n;
 418
 419         switch (sbalf15) {
 420         case 0:
 421                 n = delayed ? TX_NOTIFY_DELAYED_OK : TX_NOTIFY_OK;
 422                 break;
 423         case 4:
 424         case 16:
 425         case 17:
 426         case 18:
 427                 n = delayed ? TX_NOTIFY_DELAYED_UNREACHABLE :
 428                         TX_NOTIFY_UNREACHABLE;
 429                 break;
 430         default:
 431                 n = delayed ? TX_NOTIFY_DELAYED_GENERALERROR :
 432                         TX_NOTIFY_GENERALERROR;
 433                 break;
 434         }
 435
 436         return n;
 437 }
 438
 439 static inline void qeth_cleanup_handled_pending(struct qeth_qdio_out_q *q,
 440         int bidx, int forced_cleanup)
 441 {
 442         if (q->card->options.cq != QETH_CQ_ENABLED)
 443                 return;
 444
 445         if (q->bufs[bidx]->next_pending != NULL) {
 446                 struct qeth_qdio_out_buffer *head = q->bufs[bidx];
 447                 struct qeth_qdio_out_buffer *c = q->bufs[bidx]->next_pending;
 448
 449                 while (c) {
 450                         if (forced_cleanup ||
 451                             atomic_read(&c->state) ==
 452                               QETH_QDIO_BUF_HANDLED_DELAYED) {
 453                                 struct qeth_qdio_out_buffer *f = c;
 454                                 QETH_CARD_TEXT(f->q->card, 5, "fp");
 455                                 QETH_CARD_TEXT_(f->q->card, 5, "%lx", (long) f);
 456                                 /* release here to avoid interleaving between
 457                                    outbound tasklet and inbound tasklet
 458                                    regarding notifications and lifecycle */
 459                                 qeth_release_skbs(c);
 460
 461                                 c = f->next_pending;
 462                                 WARN_ON_ONCE(head->next_pending != f);
 463                                 head->next_pending = c;
 464                                 kmem_cache_free(qeth_qdio_outbuf_cache, f);
 465                         } else {
 466                                 head = c;
 467                                 c = c->next_pending;
 468                         }
 469
 470                 }
 471         }
 472         if (forced_cleanup && (atomic_read(&(q->bufs[bidx]->state)) ==
 473                                         QETH_QDIO_BUF_HANDLED_DELAYED)) {
 474                 /* for recovery situations */
 475                 q->bufs[bidx]->aob = q->bufstates[bidx].aob;
 476                 qeth_init_qdio_out_buf(q, bidx);
 477                 QETH_CARD_TEXT(q->card, 2, "clprecov");
 478         }
 479 }
 480
 481
 482 static inline void qeth_qdio_handle_aob(struct qeth_card *card,
 483                 unsigned long phys_aob_addr) {
 484         struct qaob *aob;
 485         struct qeth_qdio_out_buffer *buffer;
 486         enum iucv_tx_notify notification;
 487
 488         aob = (struct qaob *) phys_to_virt(phys_aob_addr);
 489         QETH_CARD_TEXT(card, 5, "haob");
 490         QETH_CARD_TEXT_(card, 5, "%lx", phys_aob_addr);
 491         buffer = (struct qeth_qdio_out_buffer *) aob->user1;
 492         QETH_CARD_TEXT_(card, 5, "%lx", aob->user1);
 493
 494         if (atomic_cmpxchg(&buffer->state, QETH_QDIO_BUF_PRIMED,
 495                            QETH_QDIO_BUF_IN_CQ) == QETH_QDIO_BUF_PRIMED) {
 496                 notification = TX_NOTIFY_OK;
 497         } else {
 498                 WARN_ON_ONCE(atomic_read(&buffer->state) !=
 499                                                         QETH_QDIO_BUF_PENDING);
 500                 atomic_set(&buffer->state, QETH_QDIO_BUF_IN_CQ);
 501                 notification = TX_NOTIFY_DELAYED_OK;
 502         }
 503
 504         if (aob->aorc != 0)  {
 505                 QETH_CARD_TEXT_(card, 2, "aorc%02X", aob->aorc);
 506                 notification = qeth_compute_cq_notification(aob->aorc, 1);
 507         }
 508         qeth_notify_skbs(buffer->q, buffer, notification);
 509
 510         buffer->aob = NULL;
 511         qeth_clear_output_buffer(buffer->q, buffer,
 512                                  QETH_QDIO_BUF_HANDLED_DELAYED);
 513
 514         /* from here on: do not touch buffer anymore */
 515         qdio_release_aob(aob);
 516 }
 517
 518 static inline int qeth_is_cq(struct qeth_card *card, unsigned int queue)
 519 {
 520         return card->options.cq == QETH_CQ_ENABLED &&
 521             card->qdio.c_q != NULL &&
 522             queue != 0 &&
 523             queue == card->qdio.no_in_queues - 1;
 524 }
 525
 526 static int __qeth_issue_next_read(struct qeth_card *card)
 527 {
 528         int rc;
 529         struct qeth_cmd_buffer *iob;
 530
 531         QETH_CARD_TEXT(card, 5, "issnxrd");
 532         if (card->read.state != CH_STATE_UP)
 533                 return -EIO;
 534         iob = qeth_get_buffer(&card->read);
 535         if (!iob) {
 536                 dev_warn(&card->gdev->dev, "The qeth device driver "
 537                         "failed to recover an error on the device\n");
 538                 QETH_DBF_MESSAGE(2, "%s issue_next_read failed: no iob "
 539                         "available\n", dev_name(&card->gdev->dev));
 540                 return -ENOMEM;
 541         }
 542         qeth_setup_ccw(&card->read, iob->data, QETH_BUFSIZE);
 543         QETH_CARD_TEXT(card, 6, "noirqpnd");
 544         rc = ccw_device_start(card->read.ccwdev, &card->read.ccw,
 545                               (addr_t) iob, 0, 0);
 546         if (rc) {
 547                 QETH_DBF_MESSAGE(2, "%s error in starting next read ccw! "
 548                         "rc=%i\n", dev_name(&card->gdev->dev), rc);
 549                 atomic_set(&card->read.irq_pending, 0);
 550                 card->read_or_write_problem = 1;
 551                 qeth_schedule_recovery(card);
 552                 wake_up(&card->wait_q);
 553         }
 554         return rc;
 555 }
 556
 557 static int qeth_issue_next_read(struct qeth_card *card)
 558 {
 559         int ret;
 560
 561         spin_lock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 562         ret = __qeth_issue_next_read(card);
 563         spin_unlock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 564
 565         return ret;
 566 }
 567
 568 static struct qeth_reply *qeth_alloc_reply(struct qeth_card *card)
 569 {
 570         struct qeth_reply *reply;
 571
 572         reply = kzalloc(sizeof(struct qeth_reply), GFP_ATOMIC);
 573         if (reply) {
 574                 atomic_set(&reply->refcnt, 1);
 575                 atomic_set(&reply->received, 0);
 576                 reply->card = card;
 577         }
 578         return reply;
 579 }
 580
 581 static void qeth_get_reply(struct qeth_reply *reply)
 582 {
 583         WARN_ON(atomic_read(&reply->refcnt) <= 0);
 584         atomic_inc(&reply->refcnt);
 585 }
 586
 587 static void qeth_put_reply(struct qeth_reply *reply)
 588 {
 589         WARN_ON(atomic_read(&reply->refcnt) <= 0);
 590         if (atomic_dec_and_test(&reply->refcnt))
 591                 kfree(reply);
 592 }
 593
 594 static void qeth_issue_ipa_msg(struct qeth_ipa_cmd *cmd, int rc,
 595                 struct qeth_card *card)
 596 {
 597         char *ipa_name;
 598         int com = cmd->hdr.command;
 599         ipa_name = qeth_get_ipa_cmd_name(com);
 600         if (rc)
 601                 QETH_DBF_MESSAGE(2, "IPA: %s(x%X) for %s/%s returned "
 602                                 "x%X \"%s\"\n",
 603                                 ipa_name, com, dev_name(&card->gdev->dev),
 604                                 QETH_CARD_IFNAME(card), rc,
 605                                 qeth_get_ipa_msg(rc));
 606         else
 607                 QETH_DBF_MESSAGE(5, "IPA: %s(x%X) for %s/%s succeeded\n",
 608                                 ipa_name, com, dev_name(&card->gdev->dev),
 609                                 QETH_CARD_IFNAME(card));
 610 }
 611
 612 static struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card,
 613                 struct qeth_cmd_buffer *iob)
 614 {
 615         struct qeth_ipa_cmd *cmd = NULL;
 616
 617         QETH_CARD_TEXT(card, 5, "chkipad");
 618         if (IS_IPA(iob->data)) {
 619                 cmd = (struct qeth_ipa_cmd *) PDU_ENCAPSULATION(iob->data);
 620                 if (IS_IPA_REPLY(cmd)) {
 621                         if (cmd->hdr.command != IPA_CMD_SETCCID &&
 622                             cmd->hdr.command != IPA_CMD_DELCCID &&
 623                             cmd->hdr.command != IPA_CMD_MODCCID &&
 624                             cmd->hdr.command != IPA_CMD_SET_DIAG_ASS)
 625                                 qeth_issue_ipa_msg(cmd,
 626                                                 cmd->hdr.return_code, card);
 627                         return cmd;
 628                 } else {
 629                         switch (cmd->hdr.command) {
 630                         case IPA_CMD_STOPLAN:
 631                                 if (cmd->hdr.return_code ==
 632                                                 IPA_RC_VEPA_TO_VEB_TRANSITION) {
 633                                         dev_err(&card->gdev->dev,
 634                                            "Interface %s is down because the "
 635                                            "adjacent port is no longer in "
 636                                            "reflective relay mode\n",
 637                                            QETH_CARD_IFNAME(card));
 638                                         qeth_close_dev(card);
 639                                 } else {
 640                                         dev_warn(&card->gdev->dev,
 641                                            "The link for interface %s on CHPID"
 642                                            " 0x%X failed\n",
 643                                            QETH_CARD_IFNAME(card),
 644                                            card->info.chpid);
 645                                         qeth_issue_ipa_msg(cmd,
 646                                                 cmd->hdr.return_code, card);
 647                                 }
 648                                 card->lan_online = 0;
 649                                 if (card->dev && netif_carrier_ok(card->dev))
 650                                         netif_carrier_off(card->dev);
 651                                 return NULL;
 652                         case IPA_CMD_STARTLAN:
 653                                 dev_info(&card->gdev->dev,
 654                                            "The link for %s on CHPID 0x%X has"
 655                                            " been restored\n",
 656                                            QETH_CARD_IFNAME(card),
 657                                            card->info.chpid);
 658                                 netif_carrier_on(card->dev);
 659                                 card->lan_online = 1;
 660                                 if (card->info.hwtrap)
 661                                         card->info.hwtrap = 2;
 662                                 qeth_schedule_recovery(card);
 663                                 return NULL;
 664                         case IPA_CMD_SETBRIDGEPORT_IQD:
 665                         case IPA_CMD_SETBRIDGEPORT_OSA:
 666                         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
 667                                 if (card->discipline->control_event_handler
 668                                                                 (card, cmd))
 669                                         return cmd;
 670                                 else
 671                                         return NULL;
 672                         case IPA_CMD_MODCCID:
 673                                 return cmd;
 674                         case IPA_CMD_REGISTER_LOCAL_ADDR:
 675                                 QETH_CARD_TEXT(card, 3, "irla");
 676                                 break;
 677                         case IPA_CMD_UNREGISTER_LOCAL_ADDR:
 678                                 QETH_CARD_TEXT(card, 3, "urla");
 679                                 break;
 680                         default:
 681                                 QETH_DBF_MESSAGE(2, "Received data is IPA "
 682                                            "but not a reply!\n");
 683                                 break;
 684                         }
 685                 }
 686         }
 687         return cmd;
 688 }
 689
 690 void qeth_clear_ipacmd_list(struct qeth_card *card)
 691 {
 692         struct qeth_reply *reply, *r;
 693         unsigned long flags;
 694
 695         QETH_CARD_TEXT(card, 4, "clipalst");
 696
 697         spin_lock_irqsave(&card->lock, flags);
 698         list_for_each_entry_safe(reply, r, &card->cmd_waiter_list, list) {
 699                 qeth_get_reply(reply);
 700                 reply->rc = -EIO;
 701                 atomic_inc(&reply->received);
 702                 list_del_init(&reply->list);
 703                 wake_up(&reply->wait_q);
 704                 qeth_put_reply(reply);
 705         }
 706         spin_unlock_irqrestore(&card->lock, flags);
 707         atomic_set(&card->write.irq_pending, 0);
 708 }
 709 EXPORT_SYMBOL_GPL(qeth_clear_ipacmd_list);
 710
 711 static int qeth_check_idx_response(struct qeth_card *card,
 712         unsigned char *buffer)
 713 {
 714         if (!buffer)
 715                 return 0;
 716
 717         QETH_DBF_HEX(CTRL, 2, buffer, QETH_DBF_CTRL_LEN);
 718         if ((buffer[2] & 0xc0) == 0xc0) {
 719                 QETH_DBF_MESSAGE(2, "received an IDX TERMINATE "
 720                            "with cause code 0x%02x%s\n",
 721                            buffer[4],
 722                            ((buffer[4] == 0x22) ?
 723                             " -- try another portname" : ""));
 724                 QETH_CARD_TEXT(card, 2, "ckidxres");
 725                 QETH_CARD_TEXT(card, 2, " idxterm");
 726                 QETH_CARD_TEXT_(card, 2, "  rc%d", -EIO);
 727                 if (buffer[4] == 0xf6) {
 728                         dev_err(&card->gdev->dev,
 729                         "The qeth device is not configured "
 730                         "for the OSI layer required by z/VM\n");
 731                         return -EPERM;
 732                 }
 733                 return -EIO;
 734         }
 735         return 0;
 736 }
 737
 738 static struct qeth_card *CARD_FROM_CDEV(struct ccw_device *cdev)
 739 {
 740         struct qeth_card *card = dev_get_drvdata(&((struct ccwgroup_device *)
 741                 dev_get_drvdata(&cdev->dev))->dev);
 742         return card;
 743 }
 744
 745 static void qeth_setup_ccw(struct qeth_channel *channel, unsigned char *iob,
 746                 __u32 len)
 747 {
 748         struct qeth_card *card;
 749
 750         card = CARD_FROM_CDEV(channel->ccwdev);
 751         QETH_CARD_TEXT(card, 4, "setupccw");
 752         if (channel == &card->read)
 753                 memcpy(&channel->ccw, READ_CCW, sizeof(struct ccw1));
 754         else
 755                 memcpy(&channel->ccw, WRITE_CCW, sizeof(struct ccw1));
 756         channel->ccw.count = len;
 757         channel->ccw.cda = (__u32) __pa(iob);
 758 }
 759
 760 static struct qeth_cmd_buffer *__qeth_get_buffer(struct qeth_channel *channel)
 761 {
 762         __u8 index;
 763
 764         QETH_CARD_TEXT(CARD_FROM_CDEV(channel->ccwdev), 6, "getbuff");
 765         index = channel->io_buf_no;
 766         do {
 767                 if (channel->iob[index].state == BUF_STATE_FREE) {
 768                         channel->iob[index].state = BUF_STATE_LOCKED;
 769                         channel->io_buf_no = (channel->io_buf_no + 1) %
 770                                 QETH_CMD_BUFFER_NO;
 771                         memset(channel->iob[index].data, 0, QETH_BUFSIZE);
 772                         return channel->iob + index;
 773                 }
 774                 index = (index + 1) % QETH_CMD_BUFFER_NO;
 775         } while (index != channel->io_buf_no);
 776
 777         return NULL;
 778 }
 779
 780 void qeth_release_buffer(struct qeth_channel *channel,
 781                 struct qeth_cmd_buffer *iob)
 782 {
 783         unsigned long flags;
 784
 785         QETH_CARD_TEXT(CARD_FROM_CDEV(channel->ccwdev), 6, "relbuff");
 786         spin_lock_irqsave(&channel->iob_lock, flags);
 787         memset(iob->data, 0, QETH_BUFSIZE);
 788         iob->state = BUF_STATE_FREE;
 789         iob->callback = qeth_send_control_data_cb;
 790         iob->rc = 0;
 791         spin_unlock_irqrestore(&channel->iob_lock, flags);
 792         wake_up(&channel->wait_q);
 793 }
 794 EXPORT_SYMBOL_GPL(qeth_release_buffer);
 795
 796 static struct qeth_cmd_buffer *qeth_get_buffer(struct qeth_channel *channel)
 797 {
 798         struct qeth_cmd_buffer *buffer = NULL;
 799         unsigned long flags;
 800
 801         spin_lock_irqsave(&channel->iob_lock, flags);
 802         buffer = __qeth_get_buffer(channel);
 803         spin_unlock_irqrestore(&channel->iob_lock, flags);
 804         return buffer;
 805 }
 806
 807 struct qeth_cmd_buffer *qeth_wait_for_buffer(struct qeth_channel *channel)
 808 {
 809         struct qeth_cmd_buffer *buffer;
 810         wait_event(channel->wait_q,
 811                    ((buffer = qeth_get_buffer(channel)) != NULL));
 812         return buffer;
 813 }
 814 EXPORT_SYMBOL_GPL(qeth_wait_for_buffer);
 815
 816 void qeth_clear_cmd_buffers(struct qeth_channel *channel)
 817 {
 818         int cnt;
 819
 820         for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++)
 821                 qeth_release_buffer(channel, &channel->iob[cnt]);
 822         channel->buf_no = 0;
 823         channel->io_buf_no = 0;
 824 }
 825 EXPORT_SYMBOL_GPL(qeth_clear_cmd_buffers);
 826
 827 static void qeth_send_control_data_cb(struct qeth_channel *channel,
 828                   struct qeth_cmd_buffer *iob)
 829 {
 830         struct qeth_card *card;
 831         struct qeth_reply *reply, *r;
 832         struct qeth_ipa_cmd *cmd;
 833         unsigned long flags;
 834         int keep_reply;
 835         int rc = 0;
 836
 837         card = CARD_FROM_CDEV(channel->ccwdev);
 838         QETH_CARD_TEXT(card, 4, "sndctlcb");
 839         rc = qeth_check_idx_response(card, iob->data);
 840         switch (rc) {
 841         case 0:
 842                 break;
 843         case -EIO:
 844                 qeth_clear_ipacmd_list(card);
 845                 qeth_schedule_recovery(card);
 846                 /* fall through */
 847         default:
 848                 goto out;
 849         }
 850
 851         cmd = qeth_check_ipa_data(card, iob);
 852         if ((cmd == NULL) && (card->state != CARD_STATE_DOWN))
 853                 goto out;
 854         /*in case of OSN : check if cmd is set */
 855         if (card->info.type == QETH_CARD_TYPE_OSN &&
 856             cmd &&
 857             cmd->hdr.command != IPA_CMD_STARTLAN &&
 858             card->osn_info.assist_cb != NULL) {
 859                 card->osn_info.assist_cb(card->dev, cmd);
 860                 goto out;
 861         }
 862
 863         spin_lock_irqsave(&card->lock, flags);
 864         list_for_each_entry_safe(reply, r, &card->cmd_waiter_list, list) {
 865                 if ((reply->seqno == QETH_IDX_COMMAND_SEQNO) ||
 866                     ((cmd) && (reply->seqno == cmd->hdr.seqno))) {
 867                         qeth_get_reply(reply);
 868                         list_del_init(&reply->list);
 869                         spin_unlock_irqrestore(&card->lock, flags);
 870                         keep_reply = 0;
 871                         if (reply->callback != NULL) {
 872                                 if (cmd) {
 873                                         reply->offset = (__u16)((char *)cmd -
 874                                                         (char *)iob->data);
 875                                         keep_reply = reply->callback(card,
 876                                                         reply,
 877                                                         (unsigned long)cmd);
 878                                 } else
 879                                         keep_reply = reply->callback(card,
 880                                                         reply,
 881                                                         (unsigned long)iob);
 882                         }
 883                         if (cmd)
 884                                 reply->rc = (u16) cmd->hdr.return_code;
 885                         else if (iob->rc)
 886                                 reply->rc = iob->rc;
 887                         if (keep_reply) {
 888                                 spin_lock_irqsave(&card->lock, flags);
 889                                 list_add_tail(&reply->list,
 890                                               &card->cmd_waiter_list);
 891                                 spin_unlock_irqrestore(&card->lock, flags);
 892                         } else {
 893                                 atomic_inc(&reply->received);
 894                                 wake_up(&reply->wait_q);
 895                         }
 896                         qeth_put_reply(reply);
 897                         goto out;
 898                 }
 899         }
 900         spin_unlock_irqrestore(&card->lock, flags);
 901 out:
 902         memcpy(&card->seqno.pdu_hdr_ack,
 903                 QETH_PDU_HEADER_SEQ_NO(iob->data),
 904                 QETH_SEQ_NO_LENGTH);
 905         qeth_release_buffer(channel, iob);
 906 }
 907
 908 static int qeth_setup_channel(struct qeth_channel *channel)
 909 {
 910         int cnt;
 911
 912         QETH_DBF_TEXT(SETUP, 2, "setupch");
 913         for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++) {
 914                 channel->iob[cnt].data =
 915                         kzalloc(QETH_BUFSIZE, GFP_DMA|GFP_KERNEL);
 916                 if (channel->iob[cnt].data == NULL)
 917                         break;
 918                 channel->iob[cnt].state = BUF_STATE_FREE;
 919                 channel->iob[cnt].channel = channel;
 920                 channel->iob[cnt].callback = qeth_send_control_data_cb;
 921                 channel->iob[cnt].rc = 0;
 922         }
 923         if (cnt < QETH_CMD_BUFFER_NO) {
 924                 while (cnt-- > 0)
 925                         kfree(channel->iob[cnt].data);
 926                 return -ENOMEM;
 927         }
 928         channel->buf_no = 0;
 929         channel->io_buf_no = 0;
 930         atomic_set(&channel->irq_pending, 0);
 931         spin_lock_init(&channel->iob_lock);
 932
 933         init_waitqueue_head(&channel->wait_q);
 934         return 0;
 935 }
 936
 937 static int qeth_set_thread_start_bit(struct qeth_card *card,
 938                 unsigned long thread)
 939 {
 940         unsigned long flags;
 941
 942         spin_lock_irqsave(&card->thread_mask_lock, flags);
 943         if (!(card->thread_allowed_mask & thread) ||
 944               (card->thread_start_mask & thread)) {
 945                 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 946                 return -EPERM;
 947         }
 948         card->thread_start_mask |= thread;
 949         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 950         return 0;
 951 }
 952
 953 void qeth_clear_thread_start_bit(struct qeth_card *card, unsigned long thread)
 954 {
 955         unsigned long flags;
 956
 957         spin_lock_irqsave(&card->thread_mask_lock, flags);
 958         card->thread_start_mask &= ~thread;
 959         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 960         wake_up(&card->wait_q);
 961 }
 962 EXPORT_SYMBOL_GPL(qeth_clear_thread_start_bit);
 963
 964 void qeth_clear_thread_running_bit(struct qeth_card *card, unsigned long thread)
 965 {
 966         unsigned long flags;
 967
 968         spin_lock_irqsave(&card->thread_mask_lock, flags);
 969         card->thread_running_mask &= ~thread;
 970         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 971         wake_up_all(&card->wait_q);
 972 }
 973 EXPORT_SYMBOL_GPL(qeth_clear_thread_running_bit);
 974
 975 static int __qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
 976 {
 977         unsigned long flags;
 978         int rc = 0;
 979
 980         spin_lock_irqsave(&card->thread_mask_lock, flags);
 981         if (card->thread_start_mask & thread) {
 982                 if ((card->thread_allowed_mask & thread) &&
 983                     !(card->thread_running_mask & thread)) {
 984                         rc = 1;
 985                         card->thread_start_mask &= ~thread;
 986                         card->thread_running_mask |= thread;
 987                 } else
 988                         rc = -EPERM;
 989         }
 990         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 991         return rc;
 992 }
 993
 994 int qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
 995 {
 996         int rc = 0;
 997
 998         wait_event(card->wait_q,
 999                    (rc = __qeth_do_run_thread(card, thread)) >= 0);
1000         return rc;
1001 }
1002 EXPORT_SYMBOL_GPL(qeth_do_run_thread);
1003
1004 void qeth_schedule_recovery(struct qeth_card *card)
1005 {
1006         QETH_CARD_TEXT(card, 2, "startrec");
1007         if (qeth_set_thread_start_bit(card, QETH_RECOVER_THREAD) == 0)
1008                 schedule_work(&card->kernel_thread_starter);
1009 }
1010 EXPORT_SYMBOL_GPL(qeth_schedule_recovery);
1011
1012 static int qeth_get_problem(struct ccw_device *cdev, struct irb *irb)
1013 {
1014         int dstat, cstat;
1015         char *sense;
1016         struct qeth_card *card;
1017
1018         sense = (char *) irb->ecw;
1019         cstat = irb->scsw.cmd.cstat;
1020         dstat = irb->scsw.cmd.dstat;
1021         card = CARD_FROM_CDEV(cdev);
1022
1023         if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK |
1024                      SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK |
1025                      SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) {
1026                 QETH_CARD_TEXT(card, 2, "CGENCHK");
1027                 dev_warn(&cdev->dev, "The qeth device driver "
1028                         "failed to recover an error on the device\n");
1029                 QETH_DBF_MESSAGE(2, "%s check on device dstat=x%x, cstat=x%x\n",
1030                         dev_name(&cdev->dev), dstat, cstat);
1031                 print_hex_dump(KERN_WARNING, "qeth: irb ", DUMP_PREFIX_OFFSET,
1032                                 16, 1, irb, 64, 1);
1033                 return 1;
1034         }
1035
1036         if (dstat & DEV_STAT_UNIT_CHECK) {
1037                 if (sense[SENSE_RESETTING_EVENT_BYTE] &
1038                     SENSE_RESETTING_EVENT_FLAG) {
1039                         QETH_CARD_TEXT(card, 2, "REVIND");
1040                         return 1;
1041                 }
1042                 if (sense[SENSE_COMMAND_REJECT_BYTE] &
1043                     SENSE_COMMAND_REJECT_FLAG) {
1044                         QETH_CARD_TEXT(card, 2, "CMDREJi");
1045                         return 1;
1046                 }
1047                 if ((sense[2] == 0xaf) && (sense[3] == 0xfe)) {
1048                         QETH_CARD_TEXT(card, 2, "AFFE");
1049                         return 1;
1050                 }
1051                 if ((!sense[0]) && (!sense[1]) && (!sense[2]) && (!sense[3])) {
1052                         QETH_CARD_TEXT(card, 2, "ZEROSEN");
1053                         return 0;
1054                 }
1055                 QETH_CARD_TEXT(card, 2, "DGENCHK");
1056                         return 1;
1057         }
1058         return 0;
1059 }
1060
1061 static long __qeth_check_irb_error(struct ccw_device *cdev,
1062                 unsigned long intparm, struct irb *irb)
1063 {
1064         struct qeth_card *card;
1065
1066         card = CARD_FROM_CDEV(cdev);
1067
1068         if (!card || !IS_ERR(irb))
1069                 return 0;
1070
1071         switch (PTR_ERR(irb)) {
1072         case -EIO:
1073                 QETH_DBF_MESSAGE(2, "%s i/o-error on device\n",
1074                         dev_name(&cdev->dev));
1075                 QETH_CARD_TEXT(card, 2, "ckirberr");
1076                 QETH_CARD_TEXT_(card, 2, "  rc%d", -EIO);
1077                 break;
1078         case -ETIMEDOUT:
1079                 dev_warn(&cdev->dev, "A hardware operation timed out"
1080                         " on the device\n");
1081                 QETH_CARD_TEXT(card, 2, "ckirberr");
1082                 QETH_CARD_TEXT_(card, 2, "  rc%d", -ETIMEDOUT);
1083                 if (intparm == QETH_RCD_PARM) {
1084                         if (card->data.ccwdev == cdev) {
1085                                 card->data.state = CH_STATE_DOWN;
1086                                 wake_up(&card->wait_q);
1087                         }
1088                 }
1089                 break;
1090         default:
1091                 QETH_DBF_MESSAGE(2, "%s unknown error %ld on device\n",
1092                         dev_name(&cdev->dev), PTR_ERR(irb));
1093                 QETH_CARD_TEXT(card, 2, "ckirberr");
1094                 QETH_CARD_TEXT(card, 2, "  rc???");
1095         }
1096         return PTR_ERR(irb);
1097 }
1098
1099 static void qeth_irq(struct ccw_device *cdev, unsigned long intparm,
1100                 struct irb *irb)
1101 {
1102         int rc;
1103         int cstat, dstat;
1104         struct qeth_cmd_buffer *buffer;
1105         struct qeth_channel *channel;
1106         struct qeth_card *card;
1107         struct qeth_cmd_buffer *iob;
1108         __u8 index;
1109
1110         if (__qeth_check_irb_error(cdev, intparm, irb))
1111                 return;
1112         cstat = irb->scsw.cmd.cstat;
1113         dstat = irb->scsw.cmd.dstat;
1114
1115         card = CARD_FROM_CDEV(cdev);
1116         if (!card)
1117                 return;
1118
1119         QETH_CARD_TEXT(card, 5, "irq");
1120
1121         if (card->read.ccwdev == cdev) {
1122                 channel = &card->read;
1123                 QETH_CARD_TEXT(card, 5, "read");
1124         } else if (card->write.ccwdev == cdev) {
1125                 channel = &card->write;
1126                 QETH_CARD_TEXT(card, 5, "write");
1127         } else {
1128                 channel = &card->data;
1129                 QETH_CARD_TEXT(card, 5, "data");
1130         }
1131         atomic_set(&channel->irq_pending, 0);
1132
1133         if (irb->scsw.cmd.fctl & (SCSW_FCTL_CLEAR_FUNC))
1134                 channel->state = CH_STATE_STOPPED;
1135
1136         if (irb->scsw.cmd.fctl & (SCSW_FCTL_HALT_FUNC))
1137                 channel->state = CH_STATE_HALTED;
1138
1139         /*let's wake up immediately on data channel*/
1140         if ((channel == &card->data) && (intparm != 0) &&
1141             (intparm != QETH_RCD_PARM))
1142                 goto out;
1143
1144         if (intparm == QETH_CLEAR_CHANNEL_PARM) {
1145                 QETH_CARD_TEXT(card, 6, "clrchpar");
1146                 /* we don't have to handle this further */
1147                 intparm = 0;
1148         }
1149         if (intparm == QETH_HALT_CHANNEL_PARM) {
1150                 QETH_CARD_TEXT(card, 6, "hltchpar");
1151                 /* we don't have to handle this further */
1152                 intparm = 0;
1153         }
1154         if ((dstat & DEV_STAT_UNIT_EXCEP) ||
1155             (dstat & DEV_STAT_UNIT_CHECK) ||
1156             (cstat)) {
1157                 if (irb->esw.esw0.erw.cons) {
1158                         dev_warn(&channel->ccwdev->dev,
1159                                 "The qeth device driver failed to recover "
1160                                 "an error on the device\n");
1161                         QETH_DBF_MESSAGE(2, "%s sense data available. cstat "
1162                                 "0x%X dstat 0x%X\n",
1163                                 dev_name(&channel->ccwdev->dev), cstat, dstat);
1164                         print_hex_dump(KERN_WARNING, "qeth: irb ",
1165                                 DUMP_PREFIX_OFFSET, 16, 1, irb, 32, 1);
1166                         print_hex_dump(KERN_WARNING, "qeth: sense data ",
1167                                 DUMP_PREFIX_OFFSET, 16, 1, irb->ecw, 32, 1);
1168                 }
1169                 if (intparm == QETH_RCD_PARM) {
1170                         channel->state = CH_STATE_DOWN;
1171                         goto out;
1172                 }
1173                 rc = qeth_get_problem(cdev, irb);
1174                 if (rc) {
1175                         card->read_or_write_problem = 1;
1176                         qeth_clear_ipacmd_list(card);
1177                         qeth_schedule_recovery(card);
1178                         goto out;
1179                 }
1180         }
1181
1182         if (intparm == QETH_RCD_PARM) {
1183                 channel->state = CH_STATE_RCD_DONE;
1184                 goto out;
1185         }
1186         if (intparm) {
1187                 buffer = (struct qeth_cmd_buffer *) __va((addr_t)intparm);
1188                 buffer->state = BUF_STATE_PROCESSED;
1189         }
1190         if (channel == &card->data)
1191                 return;
1192         if (channel == &card->read &&
1193             channel->state == CH_STATE_UP)
1194                 __qeth_issue_next_read(card);
1195
1196         iob = channel->iob;
1197         index = channel->buf_no;
1198         while (iob[index].state == BUF_STATE_PROCESSED) {
1199                 if (iob[index].callback != NULL)
1200                         iob[index].callback(channel, iob + index);
1201
1202                 index = (index + 1) % QETH_CMD_BUFFER_NO;
1203         }
1204         channel->buf_no = index;
1205 out:
1206         wake_up(&card->wait_q);
1207         return;
1208 }
1209
1210 static void qeth_notify_skbs(struct qeth_qdio_out_q *q,
1211                 struct qeth_qdio_out_buffer *buf,
1212                 enum iucv_tx_notify notification)
1213 {
1214         struct sk_buff *skb;
1215
1216         if (skb_queue_empty(&buf->skb_list))
1217                 goto out;
1218         skb = skb_peek(&buf->skb_list);
1219         while (skb) {
1220                 QETH_CARD_TEXT_(q->card, 5, "skbn%d", notification);
1221                 QETH_CARD_TEXT_(q->card, 5, "%lx", (long) skb);
1222                 if (skb->protocol == ETH_P_AF_IUCV) {
1223                         if (skb->sk) {
1224                                 struct iucv_sock *iucv = iucv_sk(skb->sk);
1225                                 iucv->sk_txnotify(skb, notification);
1226                         }
1227                 }
1228                 if (skb_queue_is_last(&buf->skb_list, skb))
1229                         skb = NULL;
1230                 else
1231                         skb = skb_queue_next(&buf->skb_list, skb);
1232         }
1233 out:
1234         return;
1235 }
1236
1237 static void qeth_release_skbs(struct qeth_qdio_out_buffer *buf)
1238 {
1239         struct sk_buff *skb;
1240         struct iucv_sock *iucv;
1241         int notify_general_error = 0;
1242
1243         if (atomic_read(&buf->state) == QETH_QDIO_BUF_PENDING)
1244                 notify_general_error = 1;
1245
1246         /* release may never happen from within CQ tasklet scope */
1247         WARN_ON_ONCE(atomic_read(&buf->state) == QETH_QDIO_BUF_IN_CQ);
1248
1249         skb = skb_dequeue(&buf->skb_list);
1250         while (skb) {
1251                 QETH_CARD_TEXT(buf->q->card, 5, "skbr");
1252                 QETH_CARD_TEXT_(buf->q->card, 5, "%lx", (long) skb);
1253                 if (notify_general_error && skb->protocol == ETH_P_AF_IUCV) {
1254                         if (skb->sk) {
1255                                 iucv = iucv_sk(skb->sk);
1256                                 iucv->sk_txnotify(skb, TX_NOTIFY_GENERALERROR);
1257                         }
1258                 }
1259                 atomic_dec(&skb->users);
1260                 dev_kfree_skb_any(skb);
1261                 skb = skb_dequeue(&buf->skb_list);
1262         }
1263 }
1264
1265 static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
1266                 struct qeth_qdio_out_buffer *buf,
1267                 enum qeth_qdio_buffer_states newbufstate)
1268 {
1269         int i;
1270
1271         /* is PCI flag set on buffer? */
1272         if (buf->buffer->element[0].sflags & SBAL_SFLAGS0_PCI_REQ)
1273                 atomic_dec(&queue->set_pci_flags_count);
1274
1275         if (newbufstate == QETH_QDIO_BUF_EMPTY) {
1276                 qeth_release_skbs(buf);
1277         }
1278         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(queue->card); ++i) {
1279                 if (buf->buffer->element[i].addr && buf->is_header[i])
1280                         kmem_cache_free(qeth_core_header_cache,
1281                                 buf->buffer->element[i].addr);
1282                 buf->is_header[i] = 0;
1283                 buf->buffer->element[i].length = 0;
1284                 buf->buffer->element[i].addr = NULL;
1285                 buf->buffer->element[i].eflags = 0;
1286                 buf->buffer->element[i].sflags = 0;
1287         }
1288         buf->buffer->element[15].eflags = 0;
1289         buf->buffer->element[15].sflags = 0;
1290         buf->next_element_to_fill = 0;
1291         atomic_set(&buf->state, newbufstate);
1292 }
1293
1294 static void qeth_clear_outq_buffers(struct qeth_qdio_out_q *q, int free)
1295 {
1296         int j;
1297
1298         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
1299                 if (!q->bufs[j])
1300                         continue;
1301                 qeth_cleanup_handled_pending(q, j, 1);
1302                 qeth_clear_output_buffer(q, q->bufs[j], QETH_QDIO_BUF_EMPTY);
1303                 if (free) {
1304                         kmem_cache_free(qeth_qdio_outbuf_cache, q->bufs[j]);
1305                         q->bufs[j] = NULL;
1306                 }
1307         }
1308 }
1309
1310 void qeth_clear_qdio_buffers(struct qeth_card *card)
1311 {
1312         int i;
1313
1314         QETH_CARD_TEXT(card, 2, "clearqdbf");
1315         /* clear outbound buffers to free skbs */
1316         for (i = 0; i < card->qdio.no_out_queues; ++i) {
1317                 if (card->qdio.out_qs[i]) {
1318                         qeth_clear_outq_buffers(card->qdio.out_qs[i], 0);
1319                 }
1320         }
1321 }
1322 EXPORT_SYMBOL_GPL(qeth_clear_qdio_buffers);
1323
1324 static void qeth_free_buffer_pool(struct qeth_card *card)
1325 {
1326         struct qeth_buffer_pool_entry *pool_entry, *tmp;
1327         int i = 0;
1328         list_for_each_entry_safe(pool_entry, tmp,
1329                                  &card->qdio.init_pool.entry_list, init_list){
1330                 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i)
1331                         free_page((unsigned long)pool_entry->elements[i]);
1332                 list_del(&pool_entry->init_list);
1333                 kfree(pool_entry);
1334         }
1335 }
1336
1337 static void qeth_clean_channel(struct qeth_channel *channel)
1338 {
1339         int cnt;
1340
1341         QETH_DBF_TEXT(SETUP, 2, "freech");
1342         for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++)
1343                 kfree(channel->iob[cnt].data);
1344 }
1345
1346 static void qeth_set_single_write_queues(struct qeth_card *card)
1347 {
1348         if ((atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED) &&
1349             (card->qdio.no_out_queues == 4))
1350                 qeth_free_qdio_buffers(card);
1351
1352         card->qdio.no_out_queues = 1;
1353         if (card->qdio.default_out_queue != 0)
1354                 dev_info(&card->gdev->dev, "Priority Queueing not supported\n");
1355
1356         card->qdio.default_out_queue = 0;
1357 }
1358
1359 static void qeth_set_multiple_write_queues(struct qeth_card *card)
1360 {
1361         if ((atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED) &&
1362             (card->qdio.no_out_queues == 1)) {
1363                 qeth_free_qdio_buffers(card);
1364                 card->qdio.default_out_queue = 2;
1365         }
1366         card->qdio.no_out_queues = 4;
1367 }
1368
1369 static void qeth_update_from_chp_desc(struct qeth_card *card)
1370 {
1371         struct ccw_device *ccwdev;
1372         struct channel_path_desc *chp_dsc;
1373
1374         QETH_DBF_TEXT(SETUP, 2, "chp_desc");
1375
1376         ccwdev = card->data.ccwdev;
1377         chp_dsc = ccw_device_get_chp_desc(ccwdev, 0);
1378         if (!chp_dsc)
1379                 goto out;
1380
1381         card->info.func_level = 0x4100 + chp_dsc->desc;
1382         if (card->info.type == QETH_CARD_TYPE_IQD)
1383                 goto out;
1384
1385         /* CHPP field bit 6 == 1 -> single queue */
1386         if ((chp_dsc->chpp & 0x02) == 0x02)
1387                 qeth_set_single_write_queues(card);
1388         else
1389                 qeth_set_multiple_write_queues(card);
1390 out:
1391         kfree(chp_dsc);
1392         QETH_DBF_TEXT_(SETUP, 2, "nr:%x", card->qdio.no_out_queues);
1393         QETH_DBF_TEXT_(SETUP, 2, "lvl:%02x", card->info.func_level);
1394 }
1395
1396 static void qeth_init_qdio_info(struct qeth_card *card)
1397 {
1398         QETH_DBF_TEXT(SETUP, 4, "intqdinf");
1399         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
1400         /* inbound */
1401         card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
1402         if (card->info.type == QETH_CARD_TYPE_IQD)
1403                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_HSDEFAULT;
1404         else
1405                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_DEFAULT;
1406         card->qdio.in_buf_pool.buf_count = card->qdio.init_pool.buf_count;
1407         INIT_LIST_HEAD(&card->qdio.in_buf_pool.entry_list);
1408         INIT_LIST_HEAD(&card->qdio.init_pool.entry_list);
1409 }
1410
1411 static void qeth_set_intial_options(struct qeth_card *card)
1412 {
1413         card->options.route4.type = NO_ROUTER;
1414         card->options.route6.type = NO_ROUTER;
1415         card->options.fake_broadcast = 0;
1416         card->options.add_hhlen = DEFAULT_ADD_HHLEN;
1417         card->options.performance_stats = 0;
1418         card->options.rx_sg_cb = QETH_RX_SG_CB;
1419         card->options.isolation = ISOLATION_MODE_NONE;
1420         card->options.cq = QETH_CQ_DISABLED;
1421 }
1422
1423 static int qeth_do_start_thread(struct qeth_card *card, unsigned long thread)
1424 {
1425         unsigned long flags;
1426         int rc = 0;
1427
1428         spin_lock_irqsave(&card->thread_mask_lock, flags);
1429         QETH_CARD_TEXT_(card, 4, "  %02x%02x%02x",
1430                         (u8) card->thread_start_mask,
1431                         (u8) card->thread_allowed_mask,
1432                         (u8) card->thread_running_mask);
1433         rc = (card->thread_start_mask & thread);
1434         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1435         return rc;
1436 }
1437
1438 static void qeth_start_kernel_thread(struct work_struct *work)
1439 {
1440         struct task_struct *ts;
1441         struct qeth_card *card = container_of(work, struct qeth_card,
1442                                         kernel_thread_starter);
1443         QETH_CARD_TEXT(card , 2, "strthrd");
1444
1445         if (card->read.state != CH_STATE_UP &&
1446             card->write.state != CH_STATE_UP)
1447                 return;
1448         if (qeth_do_start_thread(card, QETH_RECOVER_THREAD)) {
1449                 ts = kthread_run(card->discipline->recover, (void *)card,
1450                                 "qeth_recover");
1451                 if (IS_ERR(ts)) {
1452                         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1453                         qeth_clear_thread_running_bit(card,
1454                                 QETH_RECOVER_THREAD);
1455                 }
1456         }
1457 }
1458
1459 static void qeth_buffer_reclaim_work(struct work_struct *);
1460 static int qeth_setup_card(struct qeth_card *card)
1461 {
1462
1463         QETH_DBF_TEXT(SETUP, 2, "setupcrd");
1464         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1465
1466         card->read.state  = CH_STATE_DOWN;
1467         card->write.state = CH_STATE_DOWN;
1468         card->data.state  = CH_STATE_DOWN;
1469         card->state = CARD_STATE_DOWN;
1470         card->lan_online = 0;
1471         card->read_or_write_problem = 0;
1472         card->dev = NULL;
1473         spin_lock_init(&card->vlanlock);
1474         spin_lock_init(&card->mclock);
1475         spin_lock_init(&card->lock);
1476         spin_lock_init(&card->ip_lock);
1477         spin_lock_init(&card->thread_mask_lock);
1478         mutex_init(&card->conf_mutex);
1479         mutex_init(&card->discipline_mutex);
1480         card->thread_start_mask = 0;
1481         card->thread_allowed_mask = 0;
1482         card->thread_running_mask = 0;
1483         INIT_WORK(&card->kernel_thread_starter, qeth_start_kernel_thread);
1484         INIT_LIST_HEAD(&card->cmd_waiter_list);
1485         init_waitqueue_head(&card->wait_q);
1486         /* initial options */
1487         qeth_set_intial_options(card);
1488         /* IP address takeover */
1489         INIT_LIST_HEAD(&card->ipato.entries);
1490         card->ipato.enabled = false;
1491         card->ipato.invert4 = false;
1492         card->ipato.invert6 = false;
1493         /* init QDIO stuff */
1494         qeth_init_qdio_info(card);
1495         INIT_DELAYED_WORK(&card->buffer_reclaim_work, qeth_buffer_reclaim_work);
1496         INIT_WORK(&card->close_dev_work, qeth_close_dev_handler);
1497         return 0;
1498 }
1499
1500 static void qeth_core_sl_print(struct seq_file *m, struct service_level *slr)
1501 {
1502         struct qeth_card *card = container_of(slr, struct qeth_card,
1503                                         qeth_service_level);
1504         if (card->info.mcl_level[0])
1505                 seq_printf(m, "qeth: %s firmware level %s\n",
1506                         CARD_BUS_ID(card), card->info.mcl_level);
1507 }
1508
1509 static struct qeth_card *qeth_alloc_card(void)
1510 {
1511         struct qeth_card *card;
1512
1513         QETH_DBF_TEXT(SETUP, 2, "alloccrd");
1514         card = kzalloc(sizeof(struct qeth_card), GFP_DMA|GFP_KERNEL);
1515         if (!card)
1516                 goto out;
1517         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1518         if (qeth_setup_channel(&card->read))
1519                 goto out_ip;
1520         if (qeth_setup_channel(&card->write))
1521                 goto out_channel;
1522         card->options.layer2 = -1;
1523         card->qeth_service_level.seq_print = qeth_core_sl_print;
1524         register_service_level(&card->qeth_service_level);
1525         return card;
1526
1527 out_channel:
1528         qeth_clean_channel(&card->read);
1529 out_ip:
1530         kfree(card);
1531 out:
1532         return NULL;
1533 }
1534
1535 static int qeth_determine_card_type(struct qeth_card *card)
1536 {
1537         int i = 0;
1538
1539         QETH_DBF_TEXT(SETUP, 2, "detcdtyp");
1540
1541         card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT;
1542         card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
1543         while (known_devices[i][QETH_DEV_MODEL_IND]) {
1544                 if ((CARD_RDEV(card)->id.dev_type ==
1545                                 known_devices[i][QETH_DEV_TYPE_IND]) &&
1546                     (CARD_RDEV(card)->id.dev_model ==
1547                                 known_devices[i][QETH_DEV_MODEL_IND])) {
1548                         card->info.type = known_devices[i][QETH_DEV_MODEL_IND];
1549                         card->qdio.no_out_queues =
1550                                 known_devices[i][QETH_QUEUE_NO_IND];
1551                         card->qdio.no_in_queues = 1;
1552                         card->info.is_multicast_different =
1553                                 known_devices[i][QETH_MULTICAST_IND];
1554                         qeth_update_from_chp_desc(card);
1555                         return 0;
1556                 }
1557                 i++;
1558         }
1559         card->info.type = QETH_CARD_TYPE_UNKNOWN;
1560         dev_err(&card->gdev->dev, "The adapter hardware is of an "
1561                 "unknown type\n");
1562         return -ENOENT;
1563 }
1564
1565 static int qeth_clear_channel(struct qeth_channel *channel)
1566 {
1567         unsigned long flags;
1568         struct qeth_card *card;
1569         int rc;
1570
1571         card = CARD_FROM_CDEV(channel->ccwdev);
1572         QETH_CARD_TEXT(card, 3, "clearch");
1573         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1574         rc = ccw_device_clear(channel->ccwdev, QETH_CLEAR_CHANNEL_PARM);
1575         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1576
1577         if (rc)
1578                 return rc;
1579         rc = wait_event_interruptible_timeout(card->wait_q,
1580                         channel->state == CH_STATE_STOPPED, QETH_TIMEOUT);
1581         if (rc == -ERESTARTSYS)
1582                 return rc;
1583         if (channel->state != CH_STATE_STOPPED)
1584                 return -ETIME;
1585         channel->state = CH_STATE_DOWN;
1586         return 0;
1587 }
1588
1589 static int qeth_halt_channel(struct qeth_channel *channel)
1590 {
1591         unsigned long flags;
1592         struct qeth_card *card;
1593         int rc;
1594
1595         card = CARD_FROM_CDEV(channel->ccwdev);
1596         QETH_CARD_TEXT(card, 3, "haltch");
1597         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1598         rc = ccw_device_halt(channel->ccwdev, QETH_HALT_CHANNEL_PARM);
1599         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1600
1601         if (rc)
1602                 return rc;
1603         rc = wait_event_interruptible_timeout(card->wait_q,
1604                         channel->state == CH_STATE_HALTED, QETH_TIMEOUT);
1605         if (rc == -ERESTARTSYS)
1606                 return rc;
1607         if (channel->state != CH_STATE_HALTED)
1608                 return -ETIME;
1609         return 0;
1610 }
1611
1612 static int qeth_halt_channels(struct qeth_card *card)
1613 {
1614         int rc1 = 0, rc2 = 0, rc3 = 0;
1615
1616         QETH_CARD_TEXT(card, 3, "haltchs");
1617         rc1 = qeth_halt_channel(&card->read);
1618         rc2 = qeth_halt_channel(&card->write);
1619         rc3 = qeth_halt_channel(&card->data);
1620         if (rc1)
1621                 return rc1;
1622         if (rc2)
1623                 return rc2;
1624         return rc3;
1625 }
1626
1627 static int qeth_clear_channels(struct qeth_card *card)
1628 {
1629         int rc1 = 0, rc2 = 0, rc3 = 0;
1630
1631         QETH_CARD_TEXT(card, 3, "clearchs");
1632         rc1 = qeth_clear_channel(&card->read);
1633         rc2 = qeth_clear_channel(&card->write);
1634         rc3 = qeth_clear_channel(&card->data);
1635         if (rc1)
1636                 return rc1;
1637         if (rc2)
1638                 return rc2;
1639         return rc3;
1640 }
1641
1642 static int qeth_clear_halt_card(struct qeth_card *card, int halt)
1643 {
1644         int rc = 0;
1645
1646         QETH_CARD_TEXT(card, 3, "clhacrd");
1647
1648         if (halt)
1649                 rc = qeth_halt_channels(card);
1650         if (rc)
1651                 return rc;
1652         return qeth_clear_channels(card);
1653 }
1654
1655 int qeth_qdio_clear_card(struct qeth_card *card, int use_halt)
1656 {
1657         int rc = 0;
1658
1659         QETH_CARD_TEXT(card, 3, "qdioclr");
1660         switch (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ESTABLISHED,
1661                 QETH_QDIO_CLEANING)) {
1662         case QETH_QDIO_ESTABLISHED:
1663                 if (card->info.type == QETH_CARD_TYPE_IQD)
1664                         rc = qdio_shutdown(CARD_DDEV(card),
1665                                 QDIO_FLAG_CLEANUP_USING_HALT);
1666                 else
1667                         rc = qdio_shutdown(CARD_DDEV(card),
1668                                 QDIO_FLAG_CLEANUP_USING_CLEAR);
1669                 if (rc)
1670                         QETH_CARD_TEXT_(card, 3, "1err%d", rc);
1671                 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
1672                 break;
1673         case QETH_QDIO_CLEANING:
1674                 return rc;
1675         default:
1676                 break;
1677         }
1678         rc = qeth_clear_halt_card(card, use_halt);
1679         if (rc)
1680                 QETH_CARD_TEXT_(card, 3, "2err%d", rc);
1681         card->state = CARD_STATE_DOWN;
1682         return rc;
1683 }
1684 EXPORT_SYMBOL_GPL(qeth_qdio_clear_card);
1685
1686 static int qeth_read_conf_data(struct qeth_card *card, void **buffer,
1687                                int *length)
1688 {
1689         struct ciw *ciw;
1690         char *rcd_buf;
1691         int ret;
1692         struct qeth_channel *channel = &card->data;
1693         unsigned long flags;
1694
1695         /*
1696          * scan for RCD command in extended SenseID data
1697          */
1698         ciw = ccw_device_get_ciw(channel->ccwdev, CIW_TYPE_RCD);
1699         if (!ciw || ciw->cmd == 0)
1700                 return -EOPNOTSUPP;
1701         rcd_buf = kzalloc(ciw->count, GFP_KERNEL | GFP_DMA);
1702         if (!rcd_buf)
1703                 return -ENOMEM;
1704
1705         channel->ccw.cmd_code = ciw->cmd;
1706         channel->ccw.cda = (__u32) __pa(rcd_buf);
1707         channel->ccw.count = ciw->count;
1708         channel->ccw.flags = CCW_FLAG_SLI;
1709         channel->state = CH_STATE_RCD;
1710         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1711         ret = ccw_device_start_timeout(channel->ccwdev, &channel->ccw,
1712                                        QETH_RCD_PARM, LPM_ANYPATH, 0,
1713                                        QETH_RCD_TIMEOUT);
1714         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1715         if (!ret)
1716                 wait_event(card->wait_q,
1717                            (channel->state == CH_STATE_RCD_DONE ||
1718                             channel->state == CH_STATE_DOWN));
1719         if (channel->state == CH_STATE_DOWN)
1720                 ret = -EIO;
1721         else
1722                 channel->state = CH_STATE_DOWN;
1723         if (ret) {
1724                 kfree(rcd_buf);
1725                 *buffer = NULL;
1726                 *length = 0;
1727         } else {
1728                 *length = ciw->count;
1729                 *buffer = rcd_buf;
1730         }
1731         return ret;
1732 }
1733
1734 static void qeth_configure_unitaddr(struct qeth_card *card, char *prcd)
1735 {
1736         QETH_DBF_TEXT(SETUP, 2, "cfgunit");
1737         card->info.chpid = prcd[30];
1738         card->info.unit_addr2 = prcd[31];
1739         card->info.cula = prcd[63];
1740         card->info.guestlan = ((prcd[0x10] == _ascebc['V']) &&
1741                                (prcd[0x11] == _ascebc['M']));
1742 }
1743
1744 static void qeth_configure_blkt_default(struct qeth_card *card, char *prcd)
1745 {
1746         QETH_DBF_TEXT(SETUP, 2, "cfgblkt");
1747
1748         if (prcd[74] == 0xF0 && prcd[75] == 0xF0 &&
1749             prcd[76] >= 0xF1 && prcd[76] <= 0xF4) {
1750                 card->info.blkt.time_total = 0;
1751                 card->info.blkt.inter_packet = 0;
1752                 card->info.blkt.inter_packet_jumbo = 0;
1753         } else {
1754                 card->info.blkt.time_total = 250;
1755                 card->info.blkt.inter_packet = 5;
1756                 card->info.blkt.inter_packet_jumbo = 15;
1757         }
1758 }
1759
1760 static void qeth_init_tokens(struct qeth_card *card)
1761 {
1762         card->token.issuer_rm_w = 0x00010103UL;
1763         card->token.cm_filter_w = 0x00010108UL;
1764         card->token.cm_connection_w = 0x0001010aUL;
1765         card->token.ulp_filter_w = 0x0001010bUL;
1766         card->token.ulp_connection_w = 0x0001010dUL;
1767 }
1768
1769 static void qeth_init_func_level(struct qeth_card *card)
1770 {
1771         switch (card->info.type) {
1772         case QETH_CARD_TYPE_IQD:
1773                 card->info.func_level = QETH_IDX_FUNC_LEVEL_IQD;
1774                 break;
1775         case QETH_CARD_TYPE_OSD:
1776         case QETH_CARD_TYPE_OSN:
1777                 card->info.func_level = QETH_IDX_FUNC_LEVEL_OSD;
1778                 break;
1779         default:
1780                 break;
1781         }
1782 }
1783
1784 static int qeth_idx_activate_get_answer(struct qeth_channel *channel,
1785                 void (*idx_reply_cb)(struct qeth_channel *,
1786                         struct qeth_cmd_buffer *))
1787 {
1788         struct qeth_cmd_buffer *iob;
1789         unsigned long flags;
1790         int rc;
1791         struct qeth_card *card;
1792
1793         QETH_DBF_TEXT(SETUP, 2, "idxanswr");
1794         card = CARD_FROM_CDEV(channel->ccwdev);
1795         iob = qeth_get_buffer(channel);
1796         if (!iob)
1797                 return -ENOMEM;
1798         iob->callback = idx_reply_cb;
1799         memcpy(&channel->ccw, READ_CCW, sizeof(struct ccw1));
1800         channel->ccw.count = QETH_BUFSIZE;
1801         channel->ccw.cda = (__u32) __pa(iob->data);
1802
1803         wait_event(card->wait_q,
1804                    atomic_cmpxchg(&channel->irq_pending, 0, 1) == 0);
1805         QETH_DBF_TEXT(SETUP, 6, "noirqpnd");
1806         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1807         rc = ccw_device_start(channel->ccwdev,
1808                               &channel->ccw, (addr_t) iob, 0, 0);
1809         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1810
1811         if (rc) {
1812                 QETH_DBF_MESSAGE(2, "Error2 in activating channel rc=%d\n", rc);
1813                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
1814                 atomic_set(&channel->irq_pending, 0);
1815                 wake_up(&card->wait_q);
1816                 return rc;
1817         }
1818         rc = wait_event_interruptible_timeout(card->wait_q,
1819                          channel->state == CH_STATE_UP, QETH_TIMEOUT);
1820         if (rc == -ERESTARTSYS)
1821                 return rc;
1822         if (channel->state != CH_STATE_UP) {
1823                 rc = -ETIME;
1824                 QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
1825                 qeth_clear_cmd_buffers(channel);
1826         } else
1827                 rc = 0;
1828         return rc;
1829 }
1830
1831 static int qeth_idx_activate_channel(struct qeth_channel *channel,
1832                 void (*idx_reply_cb)(struct qeth_channel *,
1833                         struct qeth_cmd_buffer *))
1834 {
1835         struct qeth_card *card;
1836         struct qeth_cmd_buffer *iob;
1837         unsigned long flags;
1838         __u16 temp;
1839         __u8 tmp;
1840         int rc;
1841         struct ccw_dev_id temp_devid;
1842
1843         card = CARD_FROM_CDEV(channel->ccwdev);
1844
1845         QETH_DBF_TEXT(SETUP, 2, "idxactch");
1846
1847         iob = qeth_get_buffer(channel);
1848         if (!iob)
1849                 return -ENOMEM;
1850         iob->callback = idx_reply_cb;
1851         memcpy(&channel->ccw, WRITE_CCW, sizeof(struct ccw1));
1852         channel->ccw.count = IDX_ACTIVATE_SIZE;
1853         channel->ccw.cda = (__u32) __pa(iob->data);
1854         if (channel == &card->write) {
1855                 memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE);
1856                 memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data),
1857                        &card->seqno.trans_hdr, QETH_SEQ_NO_LENGTH);
1858                 card->seqno.trans_hdr++;
1859         } else {
1860                 memcpy(iob->data, IDX_ACTIVATE_READ, IDX_ACTIVATE_SIZE);
1861                 memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data),
1862                        &card->seqno.trans_hdr, QETH_SEQ_NO_LENGTH);
1863         }
1864         tmp = ((__u8)card->info.portno) | 0x80;
1865         memcpy(QETH_IDX_ACT_PNO(iob->data), &tmp, 1);
1866         memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
1867                &card->token.issuer_rm_w, QETH_MPC_TOKEN_LENGTH);
1868         memcpy(QETH_IDX_ACT_FUNC_LEVEL(iob->data),
1869                &card->info.func_level, sizeof(__u16));
1870         ccw_device_get_id(CARD_DDEV(card), &temp_devid);
1871         memcpy(QETH_IDX_ACT_QDIO_DEV_CUA(iob->data), &temp_devid.devno, 2);
1872         temp = (card->info.cula << 8) + card->info.unit_addr2;
1873         memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &temp, 2);
1874
1875         wait_event(card->wait_q,
1876                    atomic_cmpxchg(&channel->irq_pending, 0, 1) == 0);
1877         QETH_DBF_TEXT(SETUP, 6, "noirqpnd");
1878         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1879         rc = ccw_device_start(channel->ccwdev,
1880                               &channel->ccw, (addr_t) iob, 0, 0);
1881         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1882
1883         if (rc) {
1884                 QETH_DBF_MESSAGE(2, "Error1 in activating channel. rc=%d\n",
1885                         rc);
1886                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1887                 atomic_set(&channel->irq_pending, 0);
1888                 wake_up(&card->wait_q);
1889                 return rc;
1890         }
1891         rc = wait_event_interruptible_timeout(card->wait_q,
1892                         channel->state == CH_STATE_ACTIVATING, QETH_TIMEOUT);
1893         if (rc == -ERESTARTSYS)
1894                 return rc;
1895         if (channel->state != CH_STATE_ACTIVATING) {
1896                 dev_warn(&channel->ccwdev->dev, "The qeth device driver"
1897                         " failed to recover an error on the device\n");
1898                 QETH_DBF_MESSAGE(2, "%s IDX activate timed out\n",
1899                         dev_name(&channel->ccwdev->dev));
1900                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", -ETIME);
1901                 qeth_clear_cmd_buffers(channel);
1902                 return -ETIME;
1903         }
1904         return qeth_idx_activate_get_answer(channel, idx_reply_cb);
1905 }
1906
1907 static int qeth_peer_func_level(int level)
1908 {
1909         if ((level & 0xff) == 8)
1910                 return (level & 0xff) + 0x400;
1911         if (((level >> 8) & 3) == 1)
1912                 return (level & 0xff) + 0x200;
1913         return level;
1914 }
1915
1916 static void qeth_idx_write_cb(struct qeth_channel *channel,
1917                 struct qeth_cmd_buffer *iob)
1918 {
1919         struct qeth_card *card;
1920         __u16 temp;
1921
1922         QETH_DBF_TEXT(SETUP , 2, "idxwrcb");
1923
1924         if (channel->state == CH_STATE_DOWN) {
1925                 channel->state = CH_STATE_ACTIVATING;
1926                 goto out;
1927         }
1928         card = CARD_FROM_CDEV(channel->ccwdev);
1929
1930         if (!(QETH_IS_IDX_ACT_POS_REPLY(iob->data))) {
1931                 if (QETH_IDX_ACT_CAUSE_CODE(iob->data) == QETH_IDX_ACT_ERR_EXCL)
1932                         dev_err(&card->write.ccwdev->dev,
1933                                 "The adapter is used exclusively by another "
1934                                 "host\n");
1935                 else
1936                         QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on write channel:"
1937                                 " negative reply\n",
1938                                 dev_name(&card->write.ccwdev->dev));
1939                 goto out;
1940         }
1941         memcpy(&temp, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
1942         if ((temp & ~0x0100) != qeth_peer_func_level(card->info.func_level)) {
1943                 QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on write channel: "
1944                         "function level mismatch (sent: 0x%x, received: "
1945                         "0x%x)\n", dev_name(&card->write.ccwdev->dev),
1946                         card->info.func_level, temp);
1947                 goto out;
1948         }
1949         channel->state = CH_STATE_UP;
1950 out:
1951         qeth_release_buffer(channel, iob);
1952 }
1953
1954 static void qeth_idx_read_cb(struct qeth_channel *channel,
1955                 struct qeth_cmd_buffer *iob)
1956 {
1957         struct qeth_card *card;
1958         __u16 temp;
1959
1960         QETH_DBF_TEXT(SETUP , 2, "idxrdcb");
1961         if (channel->state == CH_STATE_DOWN) {
1962                 channel->state = CH_STATE_ACTIVATING;
1963                 goto out;
1964         }
1965
1966         card = CARD_FROM_CDEV(channel->ccwdev);
1967         if (qeth_check_idx_response(card, iob->data))
1968                         goto out;
1969
1970         if (!(QETH_IS_IDX_ACT_POS_REPLY(iob->data))) {
1971                 switch (QETH_IDX_ACT_CAUSE_CODE(iob->data)) {
1972                 case QETH_IDX_ACT_ERR_EXCL:
1973                         dev_err(&card->write.ccwdev->dev,
1974                                 "The adapter is used exclusively by another "
1975                                 "host\n");
1976                         break;
1977                 case QETH_IDX_ACT_ERR_AUTH:
1978                 case QETH_IDX_ACT_ERR_AUTH_USER:
1979                         dev_err(&card->read.ccwdev->dev,
1980                                 "Setting the device online failed because of "
1981                                 "insufficient authorization\n");
1982                         break;
1983                 default:
1984                         QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on read channel:"
1985                                 " negative reply\n",
1986                                 dev_name(&card->read.ccwdev->dev));
1987                 }
1988                 QETH_CARD_TEXT_(card, 2, "idxread%c",
1989                         QETH_IDX_ACT_CAUSE_CODE(iob->data));
1990                 goto out;
1991         }
1992
1993         memcpy(&temp, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
1994         if (temp != qeth_peer_func_level(card->info.func_level)) {
1995                 QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on read channel: function "
1996                         "level mismatch (sent: 0x%x, received: 0x%x)\n",
1997                         dev_name(&card->read.ccwdev->dev),
1998                         card->info.func_level, temp);
1999                 goto out;
2000         }
2001         memcpy(&card->token.issuer_rm_r,
2002                QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2003                QETH_MPC_TOKEN_LENGTH);
2004         memcpy(&card->info.mcl_level[0],
2005                QETH_IDX_REPLY_LEVEL(iob->data), QETH_MCL_LENGTH);
2006         channel->state = CH_STATE_UP;
2007 out:
2008         qeth_release_buffer(channel, iob);
2009 }
2010
2011 void qeth_prepare_control_data(struct qeth_card *card, int len,
2012                 struct qeth_cmd_buffer *iob)
2013 {
2014         qeth_setup_ccw(&card->write, iob->data, len);
2015         iob->callback = qeth_release_buffer;
2016
2017         memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data),
2018                &card->seqno.trans_hdr, QETH_SEQ_NO_LENGTH);
2019         card->seqno.trans_hdr++;
2020         memcpy(QETH_PDU_HEADER_SEQ_NO(iob->data),
2021                &card->seqno.pdu_hdr, QETH_SEQ_NO_LENGTH);
2022         card->seqno.pdu_hdr++;
2023         memcpy(QETH_PDU_HEADER_ACK_SEQ_NO(iob->data),
2024                &card->seqno.pdu_hdr_ack, QETH_SEQ_NO_LENGTH);
2025         QETH_DBF_HEX(CTRL, 2, iob->data, QETH_DBF_CTRL_LEN);
2026 }
2027 EXPORT_SYMBOL_GPL(qeth_prepare_control_data);
2028
2029 /**
2030  * qeth_send_control_data() -   send control command to the card
2031  * @card:                       qeth_card structure pointer
2032  * @len:                        size of the command buffer
2033  * @iob:                        qeth_cmd_buffer pointer
2034  * @reply_cb:                   callback function pointer
2035  * @cb_card:                    pointer to the qeth_card structure
2036  * @cb_reply:                   pointer to the qeth_reply structure
2037  * @cb_cmd:                     pointer to the original iob for non-IPA
2038  *                              commands, or to the qeth_ipa_cmd structure
2039  *                              for the IPA commands.
2040  * @reply_param:                private pointer passed to the callback
2041  *
2042  * Returns the value of the `return_code' field of the response
2043  * block returned from the hardware, or other error indication.
2044  * Value of zero indicates successful execution of the command.
2045  *
2046  * Callback function gets called one or more times, with cb_cmd
2047  * pointing to the response returned by the hardware. Callback
2048  * function must return non-zero if more reply blocks are expected,
2049  * and zero if the last or only reply block is received. Callback
2050  * function can get the value of the reply_param pointer from the
2051  * field 'param' of the structure qeth_reply.
2052  */
2053
2054 int qeth_send_control_data(struct qeth_card *card, int len,
2055                 struct qeth_cmd_buffer *iob,
2056                 int (*reply_cb)(struct qeth_card *cb_card,
2057                                 struct qeth_reply *cb_reply,
2058                                 unsigned long cb_cmd),
2059                 void *reply_param)
2060 {
2061         int rc;
2062         unsigned long flags;
2063         struct qeth_reply *reply = NULL;
2064         unsigned long timeout, event_timeout;
2065         struct qeth_ipa_cmd *cmd = NULL;
2066
2067         QETH_CARD_TEXT(card, 2, "sendctl");
2068
2069         if (card->read_or_write_problem) {
2070                 qeth_release_buffer(iob->channel, iob);
2071                 return -EIO;
2072         }
2073         reply = qeth_alloc_reply(card);
2074         if (!reply) {
2075                 return -ENOMEM;
2076         }
2077         reply->callback = reply_cb;
2078         reply->param = reply_param;
2079
2080         init_waitqueue_head(&reply->wait_q);
2081         QETH_DBF_HEX(CTRL, 2, iob->data, QETH_DBF_CTRL_LEN);
2082
2083         while (atomic_cmpxchg(&card->write.irq_pending, 0, 1)) ;
2084
2085         if (IS_IPA(iob->data)) {
2086                 cmd = __ipa_cmd(iob);
2087                 cmd->hdr.seqno = card->seqno.ipa++;
2088                 reply->seqno = cmd->hdr.seqno;
2089                 event_timeout = QETH_IPA_TIMEOUT;
2090         } else {
2091                 reply->seqno = QETH_IDX_COMMAND_SEQNO;
2092                 event_timeout = QETH_TIMEOUT;
2093         }
2094         qeth_prepare_control_data(card, len, iob);
2095
2096         spin_lock_irqsave(&card->lock, flags);
2097         list_add_tail(&reply->list, &card->cmd_waiter_list);
2098         spin_unlock_irqrestore(&card->lock, flags);
2099
2100         timeout = jiffies + event_timeout;
2101
2102         QETH_CARD_TEXT(card, 6, "noirqpnd");
2103         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
2104         rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
2105                               (addr_t) iob, 0, 0);
2106         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
2107         if (rc) {
2108                 QETH_DBF_MESSAGE(2, "%s qeth_send_control_data: "
2109                         "ccw_device_start rc = %i\n",
2110                         dev_name(&card->write.ccwdev->dev), rc);
2111                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
2112                 spin_lock_irqsave(&card->lock, flags);
2113                 list_del_init(&reply->list);
2114                 qeth_put_reply(reply);
2115                 spin_unlock_irqrestore(&card->lock, flags);
2116                 qeth_release_buffer(iob->channel, iob);
2117                 atomic_set(&card->write.irq_pending, 0);
2118                 wake_up(&card->wait_q);
2119                 return rc;
2120         }
2121
2122         /* we have only one long running ipassist, since we can ensure
2123            process context of this command we can sleep */
2124         if (cmd && cmd->hdr.command == IPA_CMD_SETIP &&
2125             cmd->hdr.prot_version == QETH_PROT_IPV4) {
2126                 if (!wait_event_timeout(reply->wait_q,
2127                     atomic_read(&reply->received), event_timeout))
2128                         goto time_err;
2129         } else {
2130                 while (!atomic_read(&reply->received)) {
2131                         if (time_after(jiffies, timeout))
2132                                 goto time_err;
2133                         cpu_relax();
2134                 }
2135         }
2136
2137         if (reply->rc == -EIO)
2138                 goto error;
2139         rc = reply->rc;
2140         qeth_put_reply(reply);
2141         return rc;
2142
2143 time_err:
2144         reply->rc = -ETIME;
2145         spin_lock_irqsave(&reply->card->lock, flags);
2146         list_del_init(&reply->list);
2147         spin_unlock_irqrestore(&reply->card->lock, flags);
2148         atomic_inc(&reply->received);
2149 error:
2150         atomic_set(&card->write.irq_pending, 0);
2151         qeth_release_buffer(iob->channel, iob);
2152         card->write.buf_no = (card->write.buf_no + 1) % QETH_CMD_BUFFER_NO;
2153         rc = reply->rc;
2154         qeth_put_reply(reply);
2155         return rc;
2156 }
2157 EXPORT_SYMBOL_GPL(qeth_send_control_data);
2158
2159 static int qeth_cm_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2160                 unsigned long data)
2161 {
2162         struct qeth_cmd_buffer *iob;
2163
2164         QETH_DBF_TEXT(SETUP, 2, "cmenblcb");
2165
2166         iob = (struct qeth_cmd_buffer *) data;
2167         memcpy(&card->token.cm_filter_r,
2168                QETH_CM_ENABLE_RESP_FILTER_TOKEN(iob->data),
2169                QETH_MPC_TOKEN_LENGTH);
2170         QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
2171         return 0;
2172 }
2173
2174 static int qeth_cm_enable(struct qeth_card *card)
2175 {
2176         int rc;
2177         struct qeth_cmd_buffer *iob;
2178
2179         QETH_DBF_TEXT(SETUP, 2, "cmenable");
2180
2181         iob = qeth_wait_for_buffer(&card->write);
2182         memcpy(iob->data, CM_ENABLE, CM_ENABLE_SIZE);
2183         memcpy(QETH_CM_ENABLE_ISSUER_RM_TOKEN(iob->data),
2184                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2185         memcpy(QETH_CM_ENABLE_FILTER_TOKEN(iob->data),
2186                &card->token.cm_filter_w, QETH_MPC_TOKEN_LENGTH);
2187
2188         rc = qeth_send_control_data(card, CM_ENABLE_SIZE, iob,
2189                                     qeth_cm_enable_cb, NULL);
2190         return rc;
2191 }
2192
2193 static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2194                 unsigned long data)
2195 {
2196
2197         struct qeth_cmd_buffer *iob;
2198
2199         QETH_DBF_TEXT(SETUP, 2, "cmsetpcb");
2200
2201         iob = (struct qeth_cmd_buffer *) data;
2202         memcpy(&card->token.cm_connection_r,
2203                QETH_CM_SETUP_RESP_DEST_ADDR(iob->data),
2204                QETH_MPC_TOKEN_LENGTH);
2205         QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
2206         return 0;
2207 }
2208
2209 static int qeth_cm_setup(struct qeth_card *card)
2210 {
2211         int rc;
2212         struct qeth_cmd_buffer *iob;
2213
2214         QETH_DBF_TEXT(SETUP, 2, "cmsetup");
2215
2216         iob = qeth_wait_for_buffer(&card->write);
2217         memcpy(iob->data, CM_SETUP, CM_SETUP_SIZE);
2218         memcpy(QETH_CM_SETUP_DEST_ADDR(iob->data),
2219                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2220         memcpy(QETH_CM_SETUP_CONNECTION_TOKEN(iob->data),
2221                &card->token.cm_connection_w, QETH_MPC_TOKEN_LENGTH);
2222         memcpy(QETH_CM_SETUP_FILTER_TOKEN(iob->data),
2223                &card->token.cm_filter_r, QETH_MPC_TOKEN_LENGTH);
2224         rc = qeth_send_control_data(card, CM_SETUP_SIZE, iob,
2225                                     qeth_cm_setup_cb, NULL);
2226         return rc;
2227
2228 }
2229
2230 static inline int qeth_get_initial_mtu_for_card(struct qeth_card *card)
2231 {
2232         switch (card->info.type) {
2233         case QETH_CARD_TYPE_UNKNOWN:
2234                 return 1500;
2235         case QETH_CARD_TYPE_IQD:
2236                 return card->info.max_mtu;
2237         case QETH_CARD_TYPE_OSD:
2238                 switch (card->info.link_type) {
2239                 case QETH_LINK_TYPE_HSTR:
2240                 case QETH_LINK_TYPE_LANE_TR:
2241                         return 2000;
2242                 default:
2243                         return card->options.layer2 ? 1500 : 1492;
2244                 }
2245         case QETH_CARD_TYPE_OSM:
2246         case QETH_CARD_TYPE_OSX:
2247                 return card->options.layer2 ? 1500 : 1492;
2248         default:
2249                 return 1500;
2250         }
2251 }
2252
2253 static inline int qeth_get_mtu_outof_framesize(int framesize)
2254 {
2255         switch (framesize) {
2256         case 0x4000:
2257                 return 8192;
2258         case 0x6000:
2259                 return 16384;
2260         case 0xa000:
2261                 return 32768;
2262         case 0xffff:
2263                 return 57344;
2264         default:
2265                 return 0;
2266         }
2267 }
2268
2269 static inline int qeth_mtu_is_valid(struct qeth_card *card, int mtu)
2270 {
2271         switch (card->info.type) {
2272         case QETH_CARD_TYPE_OSD:
2273         case QETH_CARD_TYPE_OSM:
2274         case QETH_CARD_TYPE_OSX:
2275         case QETH_CARD_TYPE_IQD:
2276                 return ((mtu >= 576) &&
2277                         (mtu <= card->info.max_mtu));
2278         case QETH_CARD_TYPE_OSN:
2279         case QETH_CARD_TYPE_UNKNOWN:
2280         default:
2281                 return 1;
2282         }
2283 }
2284
2285 static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2286                 unsigned long data)
2287 {
2288
2289         __u16 mtu, framesize;
2290         __u16 len;
2291         __u8 link_type;
2292         struct qeth_cmd_buffer *iob;
2293
2294         QETH_DBF_TEXT(SETUP, 2, "ulpenacb");
2295
2296         iob = (struct qeth_cmd_buffer *) data;
2297         memcpy(&card->token.ulp_filter_r,
2298                QETH_ULP_ENABLE_RESP_FILTER_TOKEN(iob->data),
2299                QETH_MPC_TOKEN_LENGTH);
2300         if (card->info.type == QETH_CARD_TYPE_IQD) {
2301                 memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2);
2302                 mtu = qeth_get_mtu_outof_framesize(framesize);
2303                 if (!mtu) {
2304                         iob->rc = -EINVAL;
2305                         QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
2306                         return 0;
2307                 }
2308                 if (card->info.initial_mtu && (card->info.initial_mtu != mtu)) {
2309                         /* frame size has changed */
2310                         if (card->dev &&
2311                             ((card->dev->mtu == card->info.initial_mtu) ||
2312                              (card->dev->mtu > mtu)))
2313                                 card->dev->mtu = mtu;
2314                         qeth_free_qdio_buffers(card);
2315                 }
2316                 card->info.initial_mtu = mtu;
2317                 card->info.max_mtu = mtu;
2318                 card->qdio.in_buf_size = mtu + 2 * PAGE_SIZE;
2319         } else {
2320                 card->info.max_mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(
2321                         iob->data);
2322                 card->info.initial_mtu = min(card->info.max_mtu,
2323                                         qeth_get_initial_mtu_for_card(card));
2324                 card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
2325         }
2326
2327         memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2);
2328         if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) {
2329                 memcpy(&link_type,
2330                        QETH_ULP_ENABLE_RESP_LINK_TYPE(iob->data), 1);
2331                 card->info.link_type = link_type;
2332         } else
2333                 card->info.link_type = 0;
2334         QETH_DBF_TEXT_(SETUP, 2, "link%d", card->info.link_type);
2335         QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
2336         return 0;
2337 }
2338
2339 static int qeth_ulp_enable(struct qeth_card *card)
2340 {
2341         int rc;
2342         char prot_type;
2343         struct qeth_cmd_buffer *iob;
2344
2345         /*FIXME: trace view callbacks*/
2346         QETH_DBF_TEXT(SETUP, 2, "ulpenabl");
2347
2348         iob = qeth_wait_for_buffer(&card->write);
2349         memcpy(iob->data, ULP_ENABLE, ULP_ENABLE_SIZE);
2350
2351         *(QETH_ULP_ENABLE_LINKNUM(iob->data)) =
2352                 (__u8) card->info.portno;
2353         if (card->options.layer2)
2354                 if (card->info.type == QETH_CARD_TYPE_OSN)
2355                         prot_type = QETH_PROT_OSN2;
2356                 else
2357                         prot_type = QETH_PROT_LAYER2;
2358         else
2359                 prot_type = QETH_PROT_TCPIP;
2360
2361         memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1);
2362         memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data),
2363                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2364         memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data),
2365                &card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH);
2366         rc = qeth_send_control_data(card, ULP_ENABLE_SIZE, iob,
2367                                     qeth_ulp_enable_cb, NULL);
2368         return rc;
2369
2370 }
2371
2372 static int qeth_ulp_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2373                 unsigned long data)
2374 {
2375         struct qeth_cmd_buffer *iob;
2376
2377         QETH_DBF_TEXT(SETUP, 2, "ulpstpcb");
2378
2379         iob = (struct qeth_cmd_buffer *) data;
2380         memcpy(&card->token.ulp_connection_r,
2381                QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2382                QETH_MPC_TOKEN_LENGTH);
2383         if (!strncmp("00S", QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2384                      3)) {
2385                 QETH_DBF_TEXT(SETUP, 2, "olmlimit");
2386                 dev_err(&card->gdev->dev, "A connection could not be "
2387                         "established because of an OLM limit\n");
2388                 iob->rc = -EMLINK;
2389         }
2390         QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
2391         return 0;
2392 }
2393
2394 static int qeth_ulp_setup(struct qeth_card *card)
2395 {
2396         int rc;
2397         __u16 temp;
2398         struct qeth_cmd_buffer *iob;
2399         struct ccw_dev_id dev_id;
2400
2401         QETH_DBF_TEXT(SETUP, 2, "ulpsetup");
2402
2403         iob = qeth_wait_for_buffer(&card->write);
2404         memcpy(iob->data, ULP_SETUP, ULP_SETUP_SIZE);
2405
2406         memcpy(QETH_ULP_SETUP_DEST_ADDR(iob->data),
2407                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2408         memcpy(QETH_ULP_SETUP_CONNECTION_TOKEN(iob->data),
2409                &card->token.ulp_connection_w, QETH_MPC_TOKEN_LENGTH);
2410         memcpy(QETH_ULP_SETUP_FILTER_TOKEN(iob->data),
2411                &card->token.ulp_filter_r, QETH_MPC_TOKEN_LENGTH);
2412
2413         ccw_device_get_id(CARD_DDEV(card), &dev_id);
2414         memcpy(QETH_ULP_SETUP_CUA(iob->data), &dev_id.devno, 2);
2415         temp = (card->info.cula << 8) + card->info.unit_addr2;
2416         memcpy(QETH_ULP_SETUP_REAL_DEVADDR(iob->data), &temp, 2);
2417         rc = qeth_send_control_data(card, ULP_SETUP_SIZE, iob,
2418                                     qeth_ulp_setup_cb, NULL);
2419         return rc;
2420 }
2421
2422 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *q, int bidx)
2423 {
2424         int rc;
2425         struct qeth_qdio_out_buffer *newbuf;
2426
2427         rc = 0;
2428         newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, GFP_ATOMIC);
2429         if (!newbuf) {
2430                 rc = -ENOMEM;
2431                 goto out;
2432         }
2433         newbuf->buffer = q->qdio_bufs[bidx];
2434         skb_queue_head_init(&newbuf->skb_list);
2435         lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key);
2436         newbuf->q = q;
2437         newbuf->aob = NULL;
2438         newbuf->next_pending = q->bufs[bidx];
2439         atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY);
2440         q->bufs[bidx] = newbuf;
2441         if (q->bufstates) {
2442                 q->bufstates[bidx].user = newbuf;
2443                 QETH_CARD_TEXT_(q->card, 2, "nbs%d", bidx);
2444                 QETH_CARD_TEXT_(q->card, 2, "%lx", (long) newbuf);
2445                 QETH_CARD_TEXT_(q->card, 2, "%lx",
2446                                 (long) newbuf->next_pending);
2447         }
2448 out:
2449         return rc;
2450 }
2451
2452 static void qeth_free_output_queue(struct qeth_qdio_out_q *q)
2453 {
2454         if (!q)
2455                 return;
2456
2457         qeth_clear_outq_buffers(q, 1);
2458         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2459         kfree(q);
2460 }
2461
2462 static struct qeth_qdio_out_q *qeth_alloc_qdio_out_buf(void)
2463 {
2464         struct qeth_qdio_out_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
2465
2466         if (!q)
2467                 return NULL;
2468
2469         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
2470                 kfree(q);
2471                 return NULL;
2472         }
2473         return q;
2474 }
2475
2476 static int qeth_alloc_qdio_buffers(struct qeth_card *card)
2477 {
2478         int i, j;
2479
2480         QETH_DBF_TEXT(SETUP, 2, "allcqdbf");
2481
2482         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED,
2483                 QETH_QDIO_ALLOCATED) != QETH_QDIO_UNINITIALIZED)
2484                 return 0;
2485
2486         QETH_DBF_TEXT(SETUP, 2, "inq");
2487         card->qdio.in_q = qeth_alloc_qdio_queue();
2488         if (!card->qdio.in_q)
2489                 goto out_nomem;
2490
2491         /* inbound buffer pool */
2492         if (qeth_alloc_buffer_pool(card))
2493                 goto out_freeinq;
2494
2495         /* outbound */
2496         card->qdio.out_qs =
2497                 kzalloc(card->qdio.no_out_queues *
2498                         sizeof(struct qeth_qdio_out_q *), GFP_KERNEL);
2499         if (!card->qdio.out_qs)
2500                 goto out_freepool;
2501         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2502                 card->qdio.out_qs[i] = qeth_alloc_qdio_out_buf();
2503                 if (!card->qdio.out_qs[i])
2504                         goto out_freeoutq;
2505                 QETH_DBF_TEXT_(SETUP, 2, "outq %i", i);
2506                 QETH_DBF_HEX(SETUP, 2, &card->qdio.out_qs[i], sizeof(void *));
2507                 card->qdio.out_qs[i]->queue_no = i;
2508                 /* give outbound qeth_qdio_buffers their qdio_buffers */
2509                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2510                         WARN_ON(card->qdio.out_qs[i]->bufs[j] != NULL);
2511                         if (qeth_init_qdio_out_buf(card->qdio.out_qs[i], j))
2512                                 goto out_freeoutqbufs;
2513                 }
2514         }
2515
2516         /* completion */
2517         if (qeth_alloc_cq(card))
2518                 goto out_freeoutq;
2519
2520         return 0;
2521
2522 out_freeoutqbufs:
2523         while (j > 0) {
2524                 --j;
2525                 kmem_cache_free(qeth_qdio_outbuf_cache,
2526                                 card->qdio.out_qs[i]->bufs[j]);
2527                 card->qdio.out_qs[i]->bufs[j] = NULL;
2528         }
2529 out_freeoutq:
2530         while (i > 0)
2531                 qeth_free_output_queue(card->qdio.out_qs[--i]);
2532         kfree(card->qdio.out_qs);
2533         card->qdio.out_qs = NULL;
2534 out_freepool:
2535         qeth_free_buffer_pool(card);
2536 out_freeinq:
2537         qeth_free_qdio_queue(card->qdio.in_q);
2538         card->qdio.in_q = NULL;
2539 out_nomem:
2540         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
2541         return -ENOMEM;
2542 }
2543
2544 static void qeth_free_qdio_buffers(struct qeth_card *card)
2545 {
2546         int i, j;
2547
2548         if (atomic_xchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED) ==
2549                 QETH_QDIO_UNINITIALIZED)
2550                 return;
2551
2552         qeth_free_cq(card);
2553         cancel_delayed_work_sync(&card->buffer_reclaim_work);
2554         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2555                 if (card->qdio.in_q->bufs[j].rx_skb)
2556                         dev_kfree_skb_any(card->qdio.in_q->bufs[j].rx_skb);
2557         }
2558         qeth_free_qdio_queue(card->qdio.in_q);
2559         card->qdio.in_q = NULL;
2560         /* inbound buffer pool */
2561         qeth_free_buffer_pool(card);
2562         /* free outbound qdio_qs */
2563         if (card->qdio.out_qs) {
2564                 for (i = 0; i < card->qdio.no_out_queues; i++)
2565                         qeth_free_output_queue(card->qdio.out_qs[i]);
2566                 kfree(card->qdio.out_qs);
2567                 card->qdio.out_qs = NULL;
2568         }
2569 }
2570
2571 static void qeth_create_qib_param_field(struct qeth_card *card,
2572                 char *param_field)
2573 {
2574
2575         param_field[0] = _ascebc['P'];
2576         param_field[1] = _ascebc['C'];
2577         param_field[2] = _ascebc['I'];
2578         param_field[3] = _ascebc['T'];
2579         *((unsigned int *) (&param_field[4])) = QETH_PCI_THRESHOLD_A(card);
2580         *((unsigned int *) (&param_field[8])) = QETH_PCI_THRESHOLD_B(card);
2581         *((unsigned int *) (&param_field[12])) = QETH_PCI_TIMER_VALUE(card);
2582 }
2583
2584 static void qeth_create_qib_param_field_blkt(struct qeth_card *card,
2585                 char *param_field)
2586 {
2587         param_field[16] = _ascebc['B'];
2588         param_field[17] = _ascebc['L'];
2589         param_field[18] = _ascebc['K'];
2590         param_field[19] = _ascebc['T'];
2591         *((unsigned int *) (&param_field[20])) = card->info.blkt.time_total;
2592         *((unsigned int *) (&param_field[24])) = card->info.blkt.inter_packet;
2593         *((unsigned int *) (&param_field[28])) =
2594                 card->info.blkt.inter_packet_jumbo;
2595 }
2596
2597 static int qeth_qdio_activate(struct qeth_card *card)
2598 {
2599         QETH_DBF_TEXT(SETUP, 3, "qdioact");
2600         return qdio_activate(CARD_DDEV(card));
2601 }
2602
2603 static int qeth_dm_act(struct qeth_card *card)
2604 {
2605         int rc;
2606         struct qeth_cmd_buffer *iob;
2607
2608         QETH_DBF_TEXT(SETUP, 2, "dmact");
2609
2610         iob = qeth_wait_for_buffer(&card->write);
2611         memcpy(iob->data, DM_ACT, DM_ACT_SIZE);
2612
2613         memcpy(QETH_DM_ACT_DEST_ADDR(iob->data),
2614                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2615         memcpy(QETH_DM_ACT_CONNECTION_TOKEN(iob->data),
2616                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2617         rc = qeth_send_control_data(card, DM_ACT_SIZE, iob, NULL, NULL);
2618         return rc;
2619 }
2620
2621 static int qeth_mpc_initialize(struct qeth_card *card)
2622 {
2623         int rc;
2624
2625         QETH_DBF_TEXT(SETUP, 2, "mpcinit");
2626
2627         rc = qeth_issue_next_read(card);
2628         if (rc) {
2629                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
2630                 return rc;
2631         }
2632         rc = qeth_cm_enable(card);
2633         if (rc) {
2634                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
2635                 goto out_qdio;
2636         }
2637         rc = qeth_cm_setup(card);
2638         if (rc) {
2639                 QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
2640                 goto out_qdio;
2641         }
2642         rc = qeth_ulp_enable(card);
2643         if (rc) {
2644                 QETH_DBF_TEXT_(SETUP, 2, "4err%d", rc);
2645                 goto out_qdio;
2646         }
2647         rc = qeth_ulp_setup(card);
2648         if (rc) {
2649                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
2650                 goto out_qdio;
2651         }
2652         rc = qeth_alloc_qdio_buffers(card);
2653         if (rc) {
2654                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
2655                 goto out_qdio;
2656         }
2657         rc = qeth_qdio_establish(card);
2658         if (rc) {
2659                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
2660                 qeth_free_qdio_buffers(card);
2661                 goto out_qdio;
2662         }
2663         rc = qeth_qdio_activate(card);
2664         if (rc) {
2665                 QETH_DBF_TEXT_(SETUP, 2, "7err%d", rc);
2666                 goto out_qdio;
2667         }
2668         rc = qeth_dm_act(card);
2669         if (rc) {
2670                 QETH_DBF_TEXT_(SETUP, 2, "8err%d", rc);
2671                 goto out_qdio;
2672         }
2673
2674         return 0;
2675 out_qdio:
2676         qeth_qdio_clear_card(card, card->info.type != QETH_CARD_TYPE_IQD);
2677         qdio_free(CARD_DDEV(card));
2678         return rc;
2679 }
2680
2681 void qeth_print_status_message(struct qeth_card *card)
2682 {
2683         switch (card->info.type) {
2684         case QETH_CARD_TYPE_OSD:
2685         case QETH_CARD_TYPE_OSM:
2686         case QETH_CARD_TYPE_OSX:
2687                 /* VM will use a non-zero first character
2688                  * to indicate a HiperSockets like reporting
2689                  * of the level OSA sets the first character to zero
2690                  * */
2691                 if (!card->info.mcl_level[0]) {
2692                         sprintf(card->info.mcl_level, "%02x%02x",
2693                                 card->info.mcl_level[2],
2694                                 card->info.mcl_level[3]);
2695                         break;
2696                 }
2697                 /* fallthrough */
2698         case QETH_CARD_TYPE_IQD:
2699                 if ((card->info.guestlan) ||
2700                     (card->info.mcl_level[0] & 0x80)) {
2701                         card->info.mcl_level[0] = (char) _ebcasc[(__u8)
2702                                 card->info.mcl_level[0]];
2703                         card->info.mcl_level[1] = (char) _ebcasc[(__u8)
2704                                 card->info.mcl_level[1]];
2705                         card->info.mcl_level[2] = (char) _ebcasc[(__u8)
2706                                 card->info.mcl_level[2]];
2707                         card->info.mcl_level[3] = (char) _ebcasc[(__u8)
2708                                 card->info.mcl_level[3]];
2709                         card->info.mcl_level[QETH_MCL_LENGTH] = 0;
2710                 }
2711                 break;
2712         default:
2713                 memset(&card->info.mcl_level[0], 0, QETH_MCL_LENGTH + 1);
2714         }
2715         dev_info(&card->gdev->dev,
2716                  "Device is a%s card%s%s%s\nwith link type %s.\n",
2717                  qeth_get_cardname(card),
2718                  (card->info.mcl_level[0]) ? " (level: " : "",
2719                  (card->info.mcl_level[0]) ? card->info.mcl_level : "",
2720                  (card->info.mcl_level[0]) ? ")" : "",
2721                  qeth_get_cardname_short(card));
2722 }
2723 EXPORT_SYMBOL_GPL(qeth_print_status_message);
2724
2725 static void qeth_initialize_working_pool_list(struct qeth_card *card)
2726 {
2727         struct qeth_buffer_pool_entry *entry;
2728
2729         QETH_CARD_TEXT(card, 5, "inwrklst");
2730
2731         list_for_each_entry(entry,
2732                             &card->qdio.init_pool.entry_list, init_list) {
2733                 qeth_put_buffer_pool_entry(card, entry);
2734         }
2735 }
2736
2737 static inline struct qeth_buffer_pool_entry *qeth_find_free_buffer_pool_entry(
2738                 struct qeth_card *card)
2739 {
2740         struct list_head *plh;
2741         struct qeth_buffer_pool_entry *entry;
2742         int i, free;
2743         struct page *page;
2744
2745         if (list_empty(&card->qdio.in_buf_pool.entry_list))
2746                 return NULL;
2747
2748         list_for_each(plh, &card->qdio.in_buf_pool.entry_list) {
2749                 entry = list_entry(plh, struct qeth_buffer_pool_entry, list);
2750                 free = 1;
2751                 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2752                         if (page_count(virt_to_page(entry->elements[i])) > 1) {
2753                                 free = 0;
2754                                 break;
2755                         }
2756                 }
2757                 if (free) {
2758                         list_del_init(&entry->list);
2759                         return entry;
2760                 }
2761         }
2762
2763         /* no free buffer in pool so take first one and swap pages */
2764         entry = list_entry(card->qdio.in_buf_pool.entry_list.next,
2765                         struct qeth_buffer_pool_entry, list);
2766         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2767                 if (page_count(virt_to_page(entry->elements[i])) > 1) {
2768                         page = alloc_page(GFP_ATOMIC);
2769                         if (!page) {
2770                                 return NULL;
2771                         } else {
2772                                 free_page((unsigned long)entry->elements[i]);
2773                                 entry->elements[i] = page_address(page);
2774                                 if (card->options.performance_stats)
2775                                         card->perf_stats.sg_alloc_page_rx++;
2776                         }
2777                 }
2778         }
2779         list_del_init(&entry->list);
2780         return entry;
2781 }
2782
2783 static int qeth_init_input_buffer(struct qeth_card *card,
2784                 struct qeth_qdio_buffer *buf)
2785 {
2786         struct qeth_buffer_pool_entry *pool_entry;
2787         int i;
2788
2789         if ((card->options.cq == QETH_CQ_ENABLED) && (!buf->rx_skb)) {
2790                 buf->rx_skb = dev_alloc_skb(QETH_RX_PULL_LEN + ETH_HLEN);
2791                 if (!buf->rx_skb)
2792                         return 1;
2793         }
2794
2795         pool_entry = qeth_find_free_buffer_pool_entry(card);
2796         if (!pool_entry)
2797                 return 1;
2798
2799         /*
2800          * since the buffer is accessed only from the input_tasklet
2801          * there shouldn't be a need to synchronize; also, since we use
2802          * the QETH_IN_BUF_REQUEUE_THRESHOLD we should never run  out off
2803          * buffers
2804          */
2805
2806         buf->pool_entry = pool_entry;
2807         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2808                 buf->buffer->element[i].length = PAGE_SIZE;
2809                 buf->buffer->element[i].addr =  pool_entry->elements[i];
2810                 if (i == QETH_MAX_BUFFER_ELEMENTS(card) - 1)
2811                         buf->buffer->element[i].eflags = SBAL_EFLAGS_LAST_ENTRY;
2812                 else
2813                         buf->buffer->element[i].eflags = 0;
2814                 buf->buffer->element[i].sflags = 0;
2815         }
2816         return 0;
2817 }
2818
2819 int qeth_init_qdio_queues(struct qeth_card *card)
2820 {
2821         int i, j;
2822         int rc;
2823
2824         QETH_DBF_TEXT(SETUP, 2, "initqdqs");
2825
2826         /* inbound queue */
2827         qdio_reset_buffers(card->qdio.in_q->qdio_bufs,
2828                            QDIO_MAX_BUFFERS_PER_Q);
2829         qeth_initialize_working_pool_list(card);
2830         /*give only as many buffers to hardware as we have buffer pool entries*/
2831         for (i = 0; i < card->qdio.in_buf_pool.buf_count - 1; ++i)
2832                 qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]);
2833         card->qdio.in_q->next_buf_to_init =
2834                 card->qdio.in_buf_pool.buf_count - 1;
2835         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0, 0,
2836                      card->qdio.in_buf_pool.buf_count - 1);
2837         if (rc) {
2838                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
2839                 return rc;
2840         }
2841
2842         /* completion */
2843         rc = qeth_cq_init(card);
2844         if (rc) {
2845                 return rc;
2846         }
2847
2848         /* outbound queue */
2849         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2850                 qdio_reset_buffers(card->qdio.out_qs[i]->qdio_bufs,
2851                                    QDIO_MAX_BUFFERS_PER_Q);
2852                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2853                         qeth_clear_output_buffer(card->qdio.out_qs[i],
2854                                         card->qdio.out_qs[i]->bufs[j],
2855                                         QETH_QDIO_BUF_EMPTY);
2856                 }
2857                 card->qdio.out_qs[i]->card = card;
2858                 card->qdio.out_qs[i]->next_buf_to_fill = 0;
2859                 card->qdio.out_qs[i]->do_pack = 0;
2860                 atomic_set(&card->qdio.out_qs[i]->used_buffers, 0);
2861                 atomic_set(&card->qdio.out_qs[i]->set_pci_flags_count, 0);
2862                 atomic_set(&card->qdio.out_qs[i]->state,
2863                            QETH_OUT_Q_UNLOCKED);
2864         }
2865         return 0;
2866 }
2867 EXPORT_SYMBOL_GPL(qeth_init_qdio_queues);
2868
2869 static inline __u8 qeth_get_ipa_adp_type(enum qeth_link_types link_type)
2870 {
2871         switch (link_type) {
2872         case QETH_LINK_TYPE_HSTR:
2873                 return 2;
2874         default:
2875                 return 1;
2876         }
2877 }
2878
2879 static void qeth_fill_ipacmd_header(struct qeth_card *card,
2880                 struct qeth_ipa_cmd *cmd, __u8 command,
2881                 enum qeth_prot_versions prot)
2882 {
2883         memset(cmd, 0, sizeof(struct qeth_ipa_cmd));
2884         cmd->hdr.command = command;
2885         cmd->hdr.initiator = IPA_CMD_INITIATOR_HOST;
2886         /* cmd->hdr.seqno is set by qeth_send_control_data() */
2887         cmd->hdr.adapter_type = qeth_get_ipa_adp_type(card->info.link_type);
2888         cmd->hdr.rel_adapter_no = (__u8) card->info.portno;
2889         if (card->options.layer2)
2890                 cmd->hdr.prim_version_no = 2;
2891         else
2892                 cmd->hdr.prim_version_no = 1;
2893         cmd->hdr.param_count = 1;
2894         cmd->hdr.prot_version = prot;
2895         cmd->hdr.ipa_supported = 0;
2896         cmd->hdr.ipa_enabled = 0;
2897 }
2898
2899 struct qeth_cmd_buffer *qeth_get_ipacmd_buffer(struct qeth_card *card,
2900                 enum qeth_ipa_cmds ipacmd, enum qeth_prot_versions prot)
2901 {
2902         struct qeth_cmd_buffer *iob;
2903         struct qeth_ipa_cmd *cmd;
2904
2905         iob = qeth_get_buffer(&card->write);
2906         if (iob) {
2907                 cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
2908                 qeth_fill_ipacmd_header(card, cmd, ipacmd, prot);
2909         } else {
2910                 dev_warn(&card->gdev->dev,
2911                          "The qeth driver ran out of channel command buffers\n");
2912                 QETH_DBF_MESSAGE(1, "%s The qeth driver ran out of channel command buffers",
2913                                  dev_name(&card->gdev->dev));
2914         }
2915
2916         return iob;
2917 }
2918 EXPORT_SYMBOL_GPL(qeth_get_ipacmd_buffer);
2919
2920 void qeth_prepare_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
2921                 char prot_type)
2922 {
2923         memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
2924         memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1);
2925         memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
2926                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2927 }
2928 EXPORT_SYMBOL_GPL(qeth_prepare_ipa_cmd);
2929
2930 /**
2931  * qeth_send_ipa_cmd() - send an IPA command
2932  *
2933  * See qeth_send_control_data() for explanation of the arguments.
2934  */
2935
2936 int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
2937                 int (*reply_cb)(struct qeth_card *, struct qeth_reply*,
2938                         unsigned long),
2939                 void *reply_param)
2940 {
2941         int rc;
2942         char prot_type;
2943
2944         QETH_CARD_TEXT(card, 4, "sendipa");
2945
2946         if (card->options.layer2)
2947                 if (card->info.type == QETH_CARD_TYPE_OSN)
2948                         prot_type = QETH_PROT_OSN2;
2949                 else
2950                         prot_type = QETH_PROT_LAYER2;
2951         else
2952                 prot_type = QETH_PROT_TCPIP;
2953         qeth_prepare_ipa_cmd(card, iob, prot_type);
2954         rc = qeth_send_control_data(card, IPA_CMD_LENGTH,
2955                                                 iob, reply_cb, reply_param);
2956         if (rc == -ETIME) {
2957                 qeth_clear_ipacmd_list(card);
2958                 qeth_schedule_recovery(card);
2959         }
2960         return rc;
2961 }
2962 EXPORT_SYMBOL_GPL(qeth_send_ipa_cmd);
2963
2964 static int qeth_send_startlan(struct qeth_card *card)
2965 {
2966         int rc;
2967         struct qeth_cmd_buffer *iob;
2968
2969         QETH_DBF_TEXT(SETUP, 2, "strtlan");
2970
2971         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_STARTLAN, 0);
2972         if (!iob)
2973                 return -ENOMEM;
2974         rc = qeth_send_ipa_cmd(card, iob, NULL, NULL);
2975         return rc;
2976 }
2977
2978 static int qeth_default_setadapterparms_cb(struct qeth_card *card,
2979                 struct qeth_reply *reply, unsigned long data)
2980 {
2981         struct qeth_ipa_cmd *cmd;
2982
2983         QETH_CARD_TEXT(card, 4, "defadpcb");
2984
2985         cmd = (struct qeth_ipa_cmd *) data;
2986         if (cmd->hdr.return_code == 0)
2987                 cmd->hdr.return_code =
2988                         cmd->data.setadapterparms.hdr.return_code;
2989         return 0;
2990 }
2991
2992 static int qeth_query_setadapterparms_cb(struct qeth_card *card,
2993                 struct qeth_reply *reply, unsigned long data)
2994 {
2995         struct qeth_ipa_cmd *cmd;
2996
2997         QETH_CARD_TEXT(card, 3, "quyadpcb");
2998
2999         cmd = (struct qeth_ipa_cmd *) data;
3000         if (cmd->data.setadapterparms.data.query_cmds_supp.lan_type & 0x7f) {
3001                 card->info.link_type =
3002                       cmd->data.setadapterparms.data.query_cmds_supp.lan_type;
3003                 QETH_DBF_TEXT_(SETUP, 2, "lnk %d", card->info.link_type);
3004         }
3005         card->options.adp.supported_funcs =
3006                 cmd->data.setadapterparms.data.query_cmds_supp.supported_cmds;
3007         return qeth_default_setadapterparms_cb(card, reply, (unsigned long)cmd);
3008 }
3009
3010 static struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card,
3011                 __u32 command, __u32 cmdlen)
3012 {
3013         struct qeth_cmd_buffer *iob;
3014         struct qeth_ipa_cmd *cmd;
3015
3016         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SETADAPTERPARMS,
3017                                      QETH_PROT_IPV4);
3018         if (iob) {
3019                 cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
3020                 cmd->data.setadapterparms.hdr.cmdlength = cmdlen;
3021                 cmd->data.setadapterparms.hdr.command_code = command;
3022                 cmd->data.setadapterparms.hdr.used_total = 1;
3023                 cmd->data.setadapterparms.hdr.seq_no = 1;
3024         }
3025
3026         return iob;
3027 }
3028
3029 int qeth_query_setadapterparms(struct qeth_card *card)
3030 {
3031         int rc;
3032         struct qeth_cmd_buffer *iob;
3033
3034         QETH_CARD_TEXT(card, 3, "queryadp");
3035         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_COMMANDS_SUPPORTED,
3036                                    sizeof(struct qeth_ipacmd_setadpparms));
3037         if (!iob)
3038                 return -ENOMEM;
3039         rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL);
3040         return rc;
3041 }
3042 EXPORT_SYMBOL_GPL(qeth_query_setadapterparms);
3043
3044 static int qeth_query_ipassists_cb(struct qeth_card *card,
3045                 struct qeth_reply *reply, unsigned long data)
3046 {
3047         struct qeth_ipa_cmd *cmd;
3048
3049         QETH_DBF_TEXT(SETUP, 2, "qipasscb");
3050
3051         cmd = (struct qeth_ipa_cmd *) data;
3052
3053         switch (cmd->hdr.return_code) {
3054         case IPA_RC_NOTSUPP:
3055         case IPA_RC_L2_UNSUPPORTED_CMD:
3056                 QETH_DBF_TEXT(SETUP, 2, "ipaunsup");
3057                 card->options.ipa4.supported_funcs |= IPA_SETADAPTERPARMS;
3058                 card->options.ipa6.supported_funcs |= IPA_SETADAPTERPARMS;
3059                 return -0;
3060         default:
3061                 if (cmd->hdr.return_code) {
3062                         QETH_DBF_MESSAGE(1, "%s IPA_CMD_QIPASSIST: Unhandled "
3063                                                 "rc=%d\n",
3064                                                 dev_name(&card->gdev->dev),
3065                                                 cmd->hdr.return_code);
3066                         return 0;
3067                 }
3068         }
3069
3070         if (cmd->hdr.prot_version == QETH_PROT_IPV4) {
3071                 card->options.ipa4.supported_funcs = cmd->hdr.ipa_supported;
3072                 card->options.ipa4.enabled_funcs = cmd->hdr.ipa_enabled;
3073         } else if (cmd->hdr.prot_version == QETH_PROT_IPV6) {
3074                 card->options.ipa6.supported_funcs = cmd->hdr.ipa_supported;
3075                 card->options.ipa6.enabled_funcs = cmd->hdr.ipa_enabled;
3076         } else
3077                 QETH_DBF_MESSAGE(1, "%s IPA_CMD_QIPASSIST: Flawed LIC detected"
3078                                         "\n", dev_name(&card->gdev->dev));
3079         return 0;
3080 }
3081
3082 int qeth_query_ipassists(struct qeth_card *card, enum qeth_prot_versions prot)
3083 {
3084         int rc;
3085         struct qeth_cmd_buffer *iob;
3086
3087         QETH_DBF_TEXT_(SETUP, 2, "qipassi%i", prot);
3088         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_QIPASSIST, prot);
3089         if (!iob)
3090                 return -ENOMEM;
3091         rc = qeth_send_ipa_cmd(card, iob, qeth_query_ipassists_cb, NULL);
3092         return rc;
3093 }
3094 EXPORT_SYMBOL_GPL(qeth_query_ipassists);
3095
3096 static int qeth_query_switch_attributes_cb(struct qeth_card *card,
3097                                 struct qeth_reply *reply, unsigned long data)
3098 {
3099         struct qeth_ipa_cmd *cmd;
3100         struct qeth_switch_info *sw_info;
3101         struct qeth_query_switch_attributes *attrs;
3102
3103         QETH_CARD_TEXT(card, 2, "qswiatcb");
3104         cmd = (struct qeth_ipa_cmd *) data;
3105         sw_info = (struct qeth_switch_info *)reply->param;
3106         if (cmd->data.setadapterparms.hdr.return_code == 0) {
3107                 attrs = &cmd->data.setadapterparms.data.query_switch_attributes;
3108                 sw_info->capabilities = attrs->capabilities;
3109                 sw_info->settings = attrs->settings;
3110                 QETH_CARD_TEXT_(card, 2, "%04x%04x", sw_info->capabilities,
3111                                                         sw_info->settings);
3112         }
3113         qeth_default_setadapterparms_cb(card, reply, (unsigned long) cmd);
3114
3115         return 0;
3116 }
3117
3118 int qeth_query_switch_attributes(struct qeth_card *card,
3119                                  struct qeth_switch_info *sw_info)
3120 {
3121         struct qeth_cmd_buffer *iob;
3122
3123         QETH_CARD_TEXT(card, 2, "qswiattr");
3124         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES))
3125                 return -EOPNOTSUPP;
3126         if (!netif_carrier_ok(card->dev))
3127                 return -ENOMEDIUM;
3128         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES,
3129                                 sizeof(struct qeth_ipacmd_setadpparms_hdr));
3130         if (!iob)
3131                 return -ENOMEM;
3132         return qeth_send_ipa_cmd(card, iob,
3133                                 qeth_query_switch_attributes_cb, sw_info);
3134 }
3135 EXPORT_SYMBOL_GPL(qeth_query_switch_attributes);
3136
3137 static int qeth_query_setdiagass_cb(struct qeth_card *card,
3138                 struct qeth_reply *reply, unsigned long data)
3139 {
3140         struct qeth_ipa_cmd *cmd;
3141         __u16 rc;
3142
3143         cmd = (struct qeth_ipa_cmd *)data;
3144         rc = cmd->hdr.return_code;
3145         if (rc)
3146                 QETH_CARD_TEXT_(card, 2, "diagq:%x", rc);
3147         else
3148                 card->info.diagass_support = cmd->data.diagass.ext;
3149         return 0;
3150 }
3151
3152 static int qeth_query_setdiagass(struct qeth_card *card)
3153 {
3154         struct qeth_cmd_buffer *iob;
3155         struct qeth_ipa_cmd    *cmd;
3156
3157         QETH_DBF_TEXT(SETUP, 2, "qdiagass");
3158         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SET_DIAG_ASS, 0);
3159         if (!iob)
3160                 return -ENOMEM;
3161         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
3162         cmd->data.diagass.subcmd_len = 16;
3163         cmd->data.diagass.subcmd = QETH_DIAGS_CMD_QUERY;
3164         return qeth_send_ipa_cmd(card, iob, qeth_query_setdiagass_cb, NULL);
3165 }
3166
3167 static void qeth_get_trap_id(struct qeth_card *card, struct qeth_trap_id *tid)
3168 {
3169         unsigned long info = get_zeroed_page(GFP_KERNEL);
3170         struct sysinfo_2_2_2 *info222 = (struct sysinfo_2_2_2 *)info;
3171         struct sysinfo_3_2_2 *info322 = (struct sysinfo_3_2_2 *)info;
3172         struct ccw_dev_id ccwid;
3173         int level;
3174
3175         tid->chpid = card->info.chpid;
3176         ccw_device_get_id(CARD_RDEV(card), &ccwid);
3177         tid->ssid = ccwid.ssid;
3178         tid->devno = ccwid.devno;
3179         if (!info)
3180                 return;
3181         level = stsi(NULL, 0, 0, 0);
3182         if ((level >= 2) && (stsi(info222, 2, 2, 2) == 0))
3183                 tid->lparnr = info222->lpar_number;
3184         if ((level >= 3) && (stsi(info322, 3, 2, 2) == 0)) {
3185                 EBCASC(info322->vm[0].name, sizeof(info322->vm[0].name));
3186                 memcpy(tid->vmname, info322->vm[0].name, sizeof(tid->vmname));
3187         }
3188         free_page(info);
3189         return;
3190 }
3191
3192 static int qeth_hw_trap_cb(struct qeth_card *card,
3193                 struct qeth_reply *reply, unsigned long data)
3194 {
3195         struct qeth_ipa_cmd *cmd;
3196         __u16 rc;
3197
3198         cmd = (struct qeth_ipa_cmd *)data;
3199         rc = cmd->hdr.return_code;
3200         if (rc)
3201                 QETH_CARD_TEXT_(card, 2, "trapc:%x", rc);
3202         return 0;
3203 }
3204
3205 int qeth_hw_trap(struct qeth_card *card, enum qeth_diags_trap_action action)
3206 {
3207         struct qeth_cmd_buffer *iob;
3208         struct qeth_ipa_cmd *cmd;
3209
3210         QETH_DBF_TEXT(SETUP, 2, "diagtrap");
3211         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SET_DIAG_ASS, 0);
3212         if (!iob)
3213                 return -ENOMEM;
3214         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
3215         cmd->data.diagass.subcmd_len = 80;
3216         cmd->data.diagass.subcmd = QETH_DIAGS_CMD_TRAP;
3217         cmd->data.diagass.type = 1;
3218         cmd->data.diagass.action = action;
3219         switch (action) {
3220         case QETH_DIAGS_TRAP_ARM:
3221                 cmd->data.diagass.options = 0x0003;
3222                 cmd->data.diagass.ext = 0x00010000 +
3223                         sizeof(struct qeth_trap_id);
3224                 qeth_get_trap_id(card,
3225                         (struct qeth_trap_id *)cmd->data.diagass.cdata);
3226                 break;
3227         case QETH_DIAGS_TRAP_DISARM:
3228                 cmd->data.diagass.options = 0x0001;
3229                 break;
3230         case QETH_DIAGS_TRAP_CAPTURE:
3231                 break;
3232         }
3233         return qeth_send_ipa_cmd(card, iob, qeth_hw_trap_cb, NULL);
3234 }
3235 EXPORT_SYMBOL_GPL(qeth_hw_trap);
3236
3237 int qeth_check_qdio_errors(struct qeth_card *card, struct qdio_buffer *buf,
3238                 unsigned int qdio_error, const char *dbftext)
3239 {
3240         if (qdio_error) {
3241                 QETH_CARD_TEXT(card, 2, dbftext);
3242                 QETH_CARD_TEXT_(card, 2, " F15=%02X",
3243                                buf->element[15].sflags);
3244                 QETH_CARD_TEXT_(card, 2, " F14=%02X",
3245                                buf->element[14].sflags);
3246                 QETH_CARD_TEXT_(card, 2, " qerr=%X", qdio_error);
3247                 if ((buf->element[15].sflags) == 0x12) {
3248                         card->stats.rx_dropped++;
3249                         return 0;
3250                 } else
3251                         return 1;
3252         }
3253         return 0;
3254 }
3255 EXPORT_SYMBOL_GPL(qeth_check_qdio_errors);
3256
3257 static void qeth_buffer_reclaim_work(struct work_struct *work)
3258 {
3259         struct qeth_card *card = container_of(work, struct qeth_card,
3260                 buffer_reclaim_work.work);
3261
3262         QETH_CARD_TEXT_(card, 2, "brw:%x", card->reclaim_index);
3263         qeth_queue_input_buffer(card, card->reclaim_index);
3264 }
3265
3266 void qeth_queue_input_buffer(struct qeth_card *card, int index)
3267 {
3268         struct qeth_qdio_q *queue = card->qdio.in_q;
3269         struct list_head *lh;
3270         int count;
3271         int i;
3272         int rc;
3273         int newcount = 0;
3274
3275         count = (index < queue->next_buf_to_init)?
3276                 card->qdio.in_buf_pool.buf_count -
3277                 (queue->next_buf_to_init - index) :
3278                 card->qdio.in_buf_pool.buf_count -
3279                 (queue->next_buf_to_init + QDIO_MAX_BUFFERS_PER_Q - index);
3280         /* only requeue at a certain threshold to avoid SIGAs */
3281         if (count >= QETH_IN_BUF_REQUEUE_THRESHOLD(card)) {
3282                 for (i = queue->next_buf_to_init;
3283                      i < queue->next_buf_to_init + count; ++i) {
3284                         if (qeth_init_input_buffer(card,
3285                                 &queue->bufs[i % QDIO_MAX_BUFFERS_PER_Q])) {
3286                                 break;
3287                         } else {
3288                                 newcount++;
3289                         }
3290                 }
3291
3292                 if (newcount < count) {
3293                         /* we are in memory shortage so we switch back to
3294                            traditional skb allocation and drop packages */
3295                         atomic_set(&card->force_alloc_skb, 3);
3296                         count = newcount;
3297                 } else {
3298                         atomic_add_unless(&card->force_alloc_skb, -1, 0);
3299                 }
3300
3301                 if (!count) {
3302                         i = 0;
3303                         list_for_each(lh, &card->qdio.in_buf_pool.entry_list)
3304                                 i++;
3305                         if (i == card->qdio.in_buf_pool.buf_count) {
3306                                 QETH_CARD_TEXT(card, 2, "qsarbw");
3307                                 card->reclaim_index = index;
3308                                 schedule_delayed_work(
3309                                         &card->buffer_reclaim_work,
3310                                         QETH_RECLAIM_WORK_TIME);
3311                         }
3312                         return;
3313                 }
3314
3315                 /*
3316                  * according to old code it should be avoided to requeue all
3317                  * 128 buffers in order to benefit from PCI avoidance.
3318                  * this function keeps at least one buffer (the buffer at
3319                  * 'index') un-requeued -> this buffer is the first buffer that
3320                  * will be requeued the next time
3321                  */
3322                 if (card->options.performance_stats) {
3323                         card->perf_stats.inbound_do_qdio_cnt++;
3324                         card->perf_stats.inbound_do_qdio_start_time =
3325                                 qeth_get_micros();
3326                 }
3327                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0,
3328                              queue->next_buf_to_init, count);
3329                 if (card->options.performance_stats)
3330                         card->perf_stats.inbound_do_qdio_time +=
3331                                 qeth_get_micros() -
3332                                 card->perf_stats.inbound_do_qdio_start_time;
3333                 if (rc) {
3334                         QETH_CARD_TEXT(card, 2, "qinberr");
3335                 }
3336                 queue->next_buf_to_init = (queue->next_buf_to_init + count) %
3337                                           QDIO_MAX_BUFFERS_PER_Q;
3338         }
3339 }
3340 EXPORT_SYMBOL_GPL(qeth_queue_input_buffer);
3341
3342 static int qeth_handle_send_error(struct qeth_card *card,
3343                 struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err)
3344 {
3345         int sbalf15 = buffer->buffer->element[15].sflags;
3346
3347         QETH_CARD_TEXT(card, 6, "hdsnderr");
3348         if (card->info.type == QETH_CARD_TYPE_IQD) {
3349                 if (sbalf15 == 0) {
3350                         qdio_err = 0;
3351                 } else {
3352                         qdio_err = 1;
3353                 }
3354         }
3355         qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr");
3356
3357         if (!qdio_err)
3358                 return QETH_SEND_ERROR_NONE;
3359
3360         if ((sbalf15 >= 15) && (sbalf15 <= 31))
3361                 return QETH_SEND_ERROR_RETRY;
3362
3363         QETH_CARD_TEXT(card, 1, "lnkfail");
3364         QETH_CARD_TEXT_(card, 1, "%04x %02x",
3365                        (u16)qdio_err, (u8)sbalf15);
3366         return QETH_SEND_ERROR_LINK_FAILURE;
3367 }
3368
3369 /*
3370  * Switched to packing state if the number of used buffers on a queue
3371  * reaches a certain limit.
3372  */
3373 static void qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q *queue)
3374 {
3375         if (!queue->do_pack) {
3376                 if (atomic_read(&queue->used_buffers)
3377                     >= QETH_HIGH_WATERMARK_PACK){
3378                         /* switch non-PACKING -> PACKING */
3379                         QETH_CARD_TEXT(queue->card, 6, "np->pack");
3380                         if (queue->card->options.performance_stats)
3381                                 queue->card->perf_stats.sc_dp_p++;
3382                         queue->do_pack = 1;
3383                 }
3384         }
3385 }
3386
3387 /*
3388  * Switches from packing to non-packing mode. If there is a packing
3389  * buffer on the queue this buffer will be prepared to be flushed.
3390  * In that case 1 is returned to inform the caller. If no buffer
3391  * has to be flushed, zero is returned.
3392  */
3393 static int qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q *queue)
3394 {
3395         struct qeth_qdio_out_buffer *buffer;
3396         int flush_count = 0;
3397
3398         if (queue->do_pack) {
3399                 if (atomic_read(&queue->used_buffers)
3400                     <= QETH_LOW_WATERMARK_PACK) {
3401                         /* switch PACKING -> non-PACKING */
3402                         QETH_CARD_TEXT(queue->card, 6, "pack->np");
3403                         if (queue->card->options.performance_stats)
3404                                 queue->card->perf_stats.sc_p_dp++;
3405                         queue->do_pack = 0;
3406                         /* flush packing buffers */
3407                         buffer = queue->bufs[queue->next_buf_to_fill];
3408                         if ((atomic_read(&buffer->state) ==
3409                                                 QETH_QDIO_BUF_EMPTY) &&
3410                             (buffer->next_element_to_fill > 0)) {
3411                                 atomic_set(&buffer->state,
3412                                            QETH_QDIO_BUF_PRIMED);
3413                                 flush_count++;
3414                                 queue->next_buf_to_fill =
3415                                         (queue->next_buf_to_fill + 1) %
3416                                         QDIO_MAX_BUFFERS_PER_Q;
3417                         }
3418                 }
3419         }
3420         return flush_count;
3421 }
3422
3423
3424 /*
3425  * Called to flush a packing buffer if no more pci flags are on the queue.
3426  * Checks if there is a packing buffer and prepares it to be flushed.
3427  * In that case returns 1, otherwise zero.
3428  */
3429 static int qeth_flush_buffers_on_no_pci(struct qeth_qdio_out_q *queue)
3430 {
3431         struct qeth_qdio_out_buffer *buffer;
3432
3433         buffer = queue->bufs[queue->next_buf_to_fill];
3434         if ((atomic_read(&buffer->state) == QETH_QDIO_BUF_EMPTY) &&
3435            (buffer->next_element_to_fill > 0)) {
3436                 /* it's a packing buffer */
3437                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3438                 queue->next_buf_to_fill =
3439                         (queue->next_buf_to_fill + 1) % QDIO_MAX_BUFFERS_PER_Q;
3440                 return 1;
3441         }
3442         return 0;
3443 }
3444
3445 static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
3446                                int count)
3447 {
3448         struct qeth_qdio_out_buffer *buf;
3449         int rc;
3450         int i;
3451         unsigned int qdio_flags;
3452
3453         for (i = index; i < index + count; ++i) {
3454                 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3455                 buf = queue->bufs[bidx];
3456                 buf->buffer->element[buf->next_element_to_fill - 1].eflags |=
3457                                 SBAL_EFLAGS_LAST_ENTRY;
3458
3459                 if (queue->bufstates)
3460                         queue->bufstates[bidx].user = buf;
3461
3462                 if (queue->card->info.type == QETH_CARD_TYPE_IQD)
3463                         continue;
3464
3465                 if (!queue->do_pack) {
3466                         if ((atomic_read(&queue->used_buffers) >=
3467                                 (QETH_HIGH_WATERMARK_PACK -
3468                                  QETH_WATERMARK_PACK_FUZZ)) &&
3469                             !atomic_read(&queue->set_pci_flags_count)) {
3470                                 /* it's likely that we'll go to packing
3471                                  * mode soon */
3472                                 atomic_inc(&queue->set_pci_flags_count);
3473                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3474                         }
3475                 } else {
3476                         if (!atomic_read(&queue->set_pci_flags_count)) {
3477                                 /*
3478                                  * there's no outstanding PCI any more, so we
3479                                  * have to request a PCI to be sure the the PCI
3480                                  * will wake at some time in the future then we
3481                                  * can flush packed buffers that might still be
3482                                  * hanging around, which can happen if no
3483                                  * further send was requested by the stack
3484                                  */
3485                                 atomic_inc(&queue->set_pci_flags_count);
3486                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3487                         }
3488                 }
3489         }
3490
3491         netif_trans_update(queue->card->dev);
3492         if (queue->card->options.performance_stats) {
3493                 queue->card->perf_stats.outbound_do_qdio_cnt++;
3494                 queue->card->perf_stats.outbound_do_qdio_start_time =
3495                         qeth_get_micros();
3496         }
3497         qdio_flags = QDIO_FLAG_SYNC_OUTPUT;
3498         if (atomic_read(&queue->set_pci_flags_count))
3499                 qdio_flags |= QDIO_FLAG_PCI_OUT;
3500         atomic_add(count, &queue->used_buffers);
3501
3502         rc = do_QDIO(CARD_DDEV(queue->card), qdio_flags,
3503                      queue->queue_no, index, count);
3504         if (queue->card->options.performance_stats)
3505                 queue->card->perf_stats.outbound_do_qdio_time +=
3506                         qeth_get_micros() -
3507                         queue->card->perf_stats.outbound_do_qdio_start_time;
3508         if (rc) {
3509                 queue->card->stats.tx_errors += count;
3510                 /* ignore temporary SIGA errors without busy condition */
3511                 if (rc == -ENOBUFS)
3512                         return;
3513                 QETH_CARD_TEXT(queue->card, 2, "flushbuf");
3514                 QETH_CARD_TEXT_(queue->card, 2, " q%d", queue->queue_no);
3515                 QETH_CARD_TEXT_(queue->card, 2, " idx%d", index);
3516                 QETH_CARD_TEXT_(queue->card, 2, " c%d", count);
3517                 QETH_CARD_TEXT_(queue->card, 2, " err%d", rc);
3518
3519                 /* this must not happen under normal circumstances. if it
3520                  * happens something is really wrong -> recover */
3521                 qeth_schedule_recovery(queue->card);
3522                 return;
3523         }
3524         if (queue->card->options.performance_stats)
3525                 queue->card->perf_stats.bufs_sent += count;
3526 }
3527
3528 static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue)
3529 {
3530         int index;
3531         int flush_cnt = 0;
3532         int q_was_packing = 0;
3533
3534         /*
3535          * check if weed have to switch to non-packing mode or if
3536          * we have to get a pci flag out on the queue
3537          */
3538         if ((atomic_read(&queue->used_buffers) <= QETH_LOW_WATERMARK_PACK) ||
3539             !atomic_read(&queue->set_pci_flags_count)) {
3540                 if (atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH) ==
3541                                 QETH_OUT_Q_UNLOCKED) {
3542                         /*
3543                          * If we get in here, there was no action in
3544                          * do_send_packet. So, we check if there is a
3545                          * packing buffer to be flushed here.
3546                          */
3547                         netif_stop_queue(queue->card->dev);
3548                         index = queue->next_buf_to_fill;
3549                         q_was_packing = queue->do_pack;
3550                         /* queue->do_pack may change */
3551                         barrier();
3552                         flush_cnt += qeth_switch_to_nonpacking_if_needed(queue);
3553                         if (!flush_cnt &&
3554                             !atomic_read(&queue->set_pci_flags_count))
3555                                 flush_cnt +=
3556                                         qeth_flush_buffers_on_no_pci(queue);
3557                         if (queue->card->options.performance_stats &&
3558                             q_was_packing)
3559                                 queue->card->perf_stats.bufs_sent_pack +=
3560                                         flush_cnt;
3561                         if (flush_cnt)
3562                                 qeth_flush_buffers(queue, index, flush_cnt);
3563                         atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
3564                 }
3565         }
3566 }
3567
3568 void qeth_qdio_start_poll(struct ccw_device *ccwdev, int queue,
3569                 unsigned long card_ptr)
3570 {
3571         struct qeth_card *card = (struct qeth_card *)card_ptr;
3572
3573         if (card->dev && (card->dev->flags & IFF_UP))
3574                 napi_schedule(&card->napi);
3575 }
3576 EXPORT_SYMBOL_GPL(qeth_qdio_start_poll);
3577
3578 int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq)
3579 {
3580         int rc;
3581
3582         if (card->options.cq ==  QETH_CQ_NOTAVAILABLE) {
3583                 rc = -1;
3584                 goto out;
3585         } else {
3586                 if (card->options.cq == cq) {
3587                         rc = 0;
3588                         goto out;
3589                 }
3590
3591                 if (card->state != CARD_STATE_DOWN &&
3592                     card->state != CARD_STATE_RECOVER) {
3593                         rc = -1;
3594                         goto out;
3595                 }
3596
3597                 qeth_free_qdio_buffers(card);
3598                 card->options.cq = cq;
3599                 rc = 0;
3600         }
3601 out:
3602         return rc;
3603
3604 }
3605 EXPORT_SYMBOL_GPL(qeth_configure_cq);
3606
3607
3608 static void qeth_qdio_cq_handler(struct qeth_card *card,
3609                 unsigned int qdio_err,
3610                 unsigned int queue, int first_element, int count) {
3611         struct qeth_qdio_q *cq = card->qdio.c_q;
3612         int i;
3613         int rc;
3614
3615         if (!qeth_is_cq(card, queue))
3616                 goto out;
3617
3618         QETH_CARD_TEXT_(card, 5, "qcqhe%d", first_element);
3619         QETH_CARD_TEXT_(card, 5, "qcqhc%d", count);
3620         QETH_CARD_TEXT_(card, 5, "qcqherr%d", qdio_err);
3621
3622         if (qdio_err) {
3623                 netif_stop_queue(card->dev);
3624                 qeth_schedule_recovery(card);
3625                 goto out;
3626         }
3627
3628         if (card->options.performance_stats) {
3629                 card->perf_stats.cq_cnt++;
3630                 card->perf_stats.cq_start_time = qeth_get_micros();
3631         }
3632
3633         for (i = first_element; i < first_element + count; ++i) {
3634                 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3635                 struct qdio_buffer *buffer = cq->qdio_bufs[bidx];
3636                 int e;
3637
3638                 e = 0;
3639                 while ((e < QDIO_MAX_ELEMENTS_PER_BUFFER) &&
3640                        buffer->element[e].addr) {
3641                         unsigned long phys_aob_addr;
3642
3643                         phys_aob_addr = (unsigned long) buffer->element[e].addr;
3644                         qeth_qdio_handle_aob(card, phys_aob_addr);
3645                         buffer->element[e].addr = NULL;
3646                         buffer->element[e].eflags = 0;
3647                         buffer->element[e].sflags = 0;
3648                         buffer->element[e].length = 0;
3649
3650                         ++e;
3651                 }
3652
3653                 buffer->element[15].eflags = 0;
3654                 buffer->element[15].sflags = 0;
3655         }
3656         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, queue,
3657                     card->qdio.c_q->next_buf_to_init,
3658                     count);
3659         if (rc) {
3660                 dev_warn(&card->gdev->dev,
3661                         "QDIO reported an error, rc=%i\n", rc);
3662                 QETH_CARD_TEXT(card, 2, "qcqherr");
3663         }
3664         card->qdio.c_q->next_buf_to_init = (card->qdio.c_q->next_buf_to_init
3665                                    + count) % QDIO_MAX_BUFFERS_PER_Q;
3666
3667         netif_wake_queue(card->dev);
3668
3669         if (card->options.performance_stats) {
3670                 int delta_t = qeth_get_micros();
3671                 delta_t -= card->perf_stats.cq_start_time;
3672                 card->perf_stats.cq_time += delta_t;
3673         }
3674 out:
3675         return;
3676 }
3677
3678 void qeth_qdio_input_handler(struct ccw_device *ccwdev, unsigned int qdio_err,
3679                 unsigned int queue, int first_elem, int count,
3680                 unsigned long card_ptr)
3681 {
3682         struct qeth_card *card = (struct qeth_card *)card_ptr;
3683
3684         QETH_CARD_TEXT_(card, 2, "qihq%d", queue);
3685         QETH_CARD_TEXT_(card, 2, "qiec%d", qdio_err);
3686
3687         if (qeth_is_cq(card, queue))
3688                 qeth_qdio_cq_handler(card, qdio_err, queue, first_elem, count);
3689         else if (qdio_err)
3690                 qeth_schedule_recovery(card);
3691
3692
3693 }
3694 EXPORT_SYMBOL_GPL(qeth_qdio_input_handler);
3695
3696 void qeth_qdio_output_handler(struct ccw_device *ccwdev,
3697                 unsigned int qdio_error, int __queue, int first_element,
3698                 int count, unsigned long card_ptr)
3699 {
3700         struct qeth_card *card        = (struct qeth_card *) card_ptr;
3701         struct qeth_qdio_out_q *queue = card->qdio.out_qs[__queue];
3702         struct qeth_qdio_out_buffer *buffer;
3703         int i;
3704
3705         QETH_CARD_TEXT(card, 6, "qdouhdl");
3706         if (qdio_error & QDIO_ERROR_FATAL) {
3707                 QETH_CARD_TEXT(card, 2, "achkcond");
3708                 netif_stop_queue(card->dev);
3709                 qeth_schedule_recovery(card);
3710                 return;
3711         }
3712         if (card->options.performance_stats) {
3713                 card->perf_stats.outbound_handler_cnt++;
3714                 card->perf_stats.outbound_handler_start_time =
3715                         qeth_get_micros();
3716         }
3717         for (i = first_element; i < (first_element + count); ++i) {
3718                 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3719                 buffer = queue->bufs[bidx];
3720                 qeth_handle_send_error(card, buffer, qdio_error);
3721
3722                 if (queue->bufstates &&
3723                     (queue->bufstates[bidx].flags &
3724                      QDIO_OUTBUF_STATE_FLAG_PENDING) != 0) {
3725                         WARN_ON_ONCE(card->options.cq != QETH_CQ_ENABLED);
3726
3727                         if (atomic_cmpxchg(&buffer->state,
3728                                            QETH_QDIO_BUF_PRIMED,
3729                                            QETH_QDIO_BUF_PENDING) ==
3730                                 QETH_QDIO_BUF_PRIMED) {
3731                                 qeth_notify_skbs(queue, buffer,
3732                                                  TX_NOTIFY_PENDING);
3733                         }
3734                         buffer->aob = queue->bufstates[bidx].aob;
3735                         QETH_CARD_TEXT_(queue->card, 5, "pel%d", bidx);
3736                         QETH_CARD_TEXT(queue->card, 5, "aob");
3737                         QETH_CARD_TEXT_(queue->card, 5, "%lx",
3738                                         virt_to_phys(buffer->aob));
3739                         if (qeth_init_qdio_out_buf(queue, bidx)) {
3740                                 QETH_CARD_TEXT(card, 2, "outofbuf");
3741                                 qeth_schedule_recovery(card);
3742                         }
3743                 } else {
3744                         if (card->options.cq == QETH_CQ_ENABLED) {
3745                                 enum iucv_tx_notify n;
3746
3747                                 n = qeth_compute_cq_notification(
3748                                         buffer->buffer->element[15].sflags, 0);
3749                                 qeth_notify_skbs(queue, buffer, n);
3750                         }
3751
3752                         qeth_clear_output_buffer(queue, buffer,
3753                                                 QETH_QDIO_BUF_EMPTY);
3754                 }
3755                 qeth_cleanup_handled_pending(queue, bidx, 0);
3756         }
3757         atomic_sub(count, &queue->used_buffers);
3758         /* check if we need to do something on this outbound queue */
3759         if (card->info.type != QETH_CARD_TYPE_IQD)
3760                 qeth_check_outbound_queue(queue);
3761
3762         netif_wake_queue(queue->card->dev);
3763         if (card->options.performance_stats)
3764                 card->perf_stats.outbound_handler_time += qeth_get_micros() -
3765                         card->perf_stats.outbound_handler_start_time;
3766 }
3767 EXPORT_SYMBOL_GPL(qeth_qdio_output_handler);
3768
3769 /* We cannot use outbound queue 3 for unicast packets on HiperSockets */
3770 static inline int qeth_cut_iqd_prio(struct qeth_card *card, int queue_num)
3771 {
3772         if ((card->info.type == QETH_CARD_TYPE_IQD) && (queue_num == 3))
3773                 return 2;
3774         return queue_num;
3775 }
3776
3777 /**
3778  * Note: Function assumes that we have 4 outbound queues.
3779  */
3780 int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb,
3781                         int ipv, int cast_type)
3782 {
3783         __be16 *tci;
3784         u8 tos;
3785
3786         if (cast_type && card->info.is_multicast_different)
3787                 return card->info.is_multicast_different &
3788                         (card->qdio.no_out_queues - 1);
3789
3790         switch (card->qdio.do_prio_queueing) {
3791         case QETH_PRIO_Q_ING_TOS:
3792         case QETH_PRIO_Q_ING_PREC:
3793                 switch (ipv) {
3794                 case 4:
3795                         tos = ipv4_get_dsfield(ip_hdr(skb));
3796                         break;
3797                 case 6:
3798                         tos = ipv6_get_dsfield(ipv6_hdr(skb));
3799                         break;
3800                 default:
3801                         return card->qdio.default_out_queue;
3802                 }
3803                 if (card->qdio.do_prio_queueing == QETH_PRIO_Q_ING_PREC)
3804                         return qeth_cut_iqd_prio(card, ~tos >> 6 & 3);
3805                 if (tos & IPTOS_MINCOST)
3806                         return qeth_cut_iqd_prio(card, 3);
3807                 if (tos & IPTOS_RELIABILITY)
3808                         return 2;
3809                 if (tos & IPTOS_THROUGHPUT)
3810                         return 1;
3811                 if (tos & IPTOS_LOWDELAY)
3812                         return 0;
3813                 break;
3814         case QETH_PRIO_Q_ING_SKB:
3815                 if (skb->priority > 5)
3816                         return 0;
3817                 return qeth_cut_iqd_prio(card, ~skb->priority >> 1 & 3);
3818         case QETH_PRIO_Q_ING_VLAN:
3819                 tci = &((struct ethhdr *)skb->data)->h_proto;
3820                 if (*tci == ETH_P_8021Q)
3821                         return qeth_cut_iqd_prio(card, ~*(tci + 1) >>
3822                         (VLAN_PRIO_SHIFT + 1) & 3);
3823                 break;
3824         default:
3825                 break;
3826         }
3827         return card->qdio.default_out_queue;
3828 }
3829 EXPORT_SYMBOL_GPL(qeth_get_priority_queue);
3830
3831 /**
3832  * qeth_get_elements_for_frags() -      find number of SBALEs for skb frags.
3833  * @skb:                                SKB address
3834  *
3835  * Returns the number of pages, and thus QDIO buffer elements, needed to cover
3836  * fragmented part of the SKB. Returns zero for linear SKB.
3837  */
3838 int qeth_get_elements_for_frags(struct sk_buff *skb)
3839 {
3840         int cnt, elements = 0;
3841
3842         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3843                 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[cnt];
3844
3845                 elements += qeth_get_elements_for_range(
3846                         (addr_t)skb_frag_address(frag),
3847                         (addr_t)skb_frag_address(frag) + skb_frag_size(frag));
3848         }
3849         return elements;
3850 }
3851 EXPORT_SYMBOL_GPL(qeth_get_elements_for_frags);
3852
3853 /**
3854  * qeth_get_elements_no() -     find number of SBALEs for skb data, inc. frags.
3855  * @card:                       qeth card structure, to check max. elems.
3856  * @skb:                        SKB address
3857  * @extra_elems:                extra elems needed, to check against max.
3858  * @data_offset:                range starts at skb->data + data_offset
3859  *
3860  * Returns the number of pages, and thus QDIO buffer elements, needed to cover
3861  * skb data, including linear part and fragments. Checks if the result plus
3862  * extra_elems fits under the limit for the card. Returns 0 if it does not.
3863  * Note: extra_elems is not included in the returned result.
3864  */
3865 int qeth_get_elements_no(struct qeth_card *card,
3866                      struct sk_buff *skb, int extra_elems, int data_offset)
3867 {
3868         addr_t end = (addr_t)skb->data + skb_headlen(skb);
3869         int elements = qeth_get_elements_for_frags(skb);
3870         addr_t start = (addr_t)skb->data + data_offset;
3871
3872         if (start != end)
3873                 elements += qeth_get_elements_for_range(start, end);
3874
3875         if ((elements + extra_elems) > QETH_MAX_BUFFER_ELEMENTS(card)) {
3876                 QETH_DBF_MESSAGE(2, "Invalid size of IP packet "
3877                         "(Number=%d / Length=%d). Discarded.\n",
3878                         elements + extra_elems, skb->len);
3879                 return 0;
3880         }
3881         return elements;
3882 }
3883 EXPORT_SYMBOL_GPL(qeth_get_elements_no);
3884
3885 int qeth_hdr_chk_and_bounce(struct sk_buff *skb, struct qeth_hdr **hdr, int len)
3886 {
3887         int hroom, inpage, rest;
3888
3889         if (((unsigned long)skb->data & PAGE_MASK) !=
3890             (((unsigned long)skb->data + len - 1) & PAGE_MASK)) {
3891                 hroom = skb_headroom(skb);
3892                 inpage = PAGE_SIZE - ((unsigned long) skb->data % PAGE_SIZE);
3893                 rest = len - inpage;
3894                 if (rest > hroom)
3895                         return 1;
3896                 memmove(skb->data - rest, skb->data, skb_headlen(skb));
3897                 skb->data -= rest;
3898                 skb->tail -= rest;
3899                 *hdr = (struct qeth_hdr *)skb->data;
3900                 QETH_DBF_MESSAGE(2, "skb bounce len: %d rest: %d\n", len, rest);
3901         }
3902         return 0;
3903 }
3904 EXPORT_SYMBOL_GPL(qeth_hdr_chk_and_bounce);
3905
3906 static inline void __qeth_fill_buffer(struct sk_buff *skb,
3907         struct qdio_buffer *buffer, int is_tso, int *next_element_to_fill,
3908         int offset)
3909 {
3910         int length = skb_headlen(skb);
3911         int length_here;
3912         int element;
3913         char *data;
3914         int first_lap, cnt;
3915         struct skb_frag_struct *frag;
3916
3917         element = *next_element_to_fill;
3918         data = skb->data;
3919         first_lap = (is_tso == 0 ? 1 : 0);
3920
3921         if (offset >= 0) {
3922                 data = skb->data + offset;
3923                 length -= offset;
3924                 first_lap = 0;
3925         }
3926
3927         while (length > 0) {
3928                 /* length_here is the remaining amount of data in this page */
3929                 length_here = PAGE_SIZE - ((unsigned long) data % PAGE_SIZE);
3930                 if (length < length_here)
3931                         length_here = length;
3932
3933                 buffer->element[element].addr = data;
3934                 buffer->element[element].length = length_here;
3935                 length -= length_here;
3936                 if (!length) {
3937                         if (first_lap)
3938                                 if (skb_shinfo(skb)->nr_frags)
3939                                         buffer->element[element].eflags =
3940                                                 SBAL_EFLAGS_FIRST_FRAG;
3941                                 else
3942                                         buffer->element[element].eflags = 0;
3943                         else
3944                                 buffer->element[element].eflags =
3945                                     SBAL_EFLAGS_MIDDLE_FRAG;
3946                 } else {
3947                         if (first_lap)
3948                                 buffer->element[element].eflags =
3949                                     SBAL_EFLAGS_FIRST_FRAG;
3950                         else
3951                                 buffer->element[element].eflags =
3952                                     SBAL_EFLAGS_MIDDLE_FRAG;
3953                 }
3954                 data += length_here;
3955                 element++;
3956                 first_lap = 0;
3957         }
3958
3959         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3960                 frag = &skb_shinfo(skb)->frags[cnt];
3961                 data = (char *)page_to_phys(skb_frag_page(frag)) +
3962                         frag->page_offset;
3963                 length = frag->size;
3964                 while (length > 0) {
3965                         length_here = PAGE_SIZE -
3966                                 ((unsigned long) data % PAGE_SIZE);
3967                         if (length < length_here)
3968                                 length_here = length;
3969
3970                         buffer->element[element].addr = data;
3971                         buffer->element[element].length = length_here;
3972                         buffer->element[element].eflags =
3973                                 SBAL_EFLAGS_MIDDLE_FRAG;
3974                         length -= length_here;
3975                         data += length_here;
3976                         element++;
3977                 }
3978         }
3979
3980         if (buffer->element[element - 1].eflags)
3981                 buffer->element[element - 1].eflags = SBAL_EFLAGS_LAST_FRAG;
3982         *next_element_to_fill = element;
3983 }
3984
3985 static inline int qeth_fill_buffer(struct qeth_qdio_out_q *queue,
3986                 struct qeth_qdio_out_buffer *buf, struct sk_buff *skb,
3987                 struct qeth_hdr *hdr, int offset, int hd_len)
3988 {
3989         struct qdio_buffer *buffer;
3990         int flush_cnt = 0, hdr_len, large_send = 0;
3991
3992         buffer = buf->buffer;
3993         atomic_inc(&skb->users);
3994         skb_queue_tail(&buf->skb_list, skb);
3995
3996         /*check first on TSO ....*/
3997         if (hdr->hdr.l3.id == QETH_HEADER_TYPE_TSO) {
3998                 int element = buf->next_element_to_fill;
3999
4000                 hdr_len = sizeof(struct qeth_hdr_tso) +
4001                         ((struct qeth_hdr_tso *)hdr)->ext.dg_hdr_len;
4002                 /*fill first buffer entry only with header information */
4003                 buffer->element[element].addr = skb->data;
4004                 buffer->element[element].length = hdr_len;
4005                 buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
4006                 buf->next_element_to_fill++;
4007                 skb->data += hdr_len;
4008                 skb->len  -= hdr_len;
4009                 large_send = 1;
4010         }
4011
4012         if (offset >= 0) {
4013                 int element = buf->next_element_to_fill;
4014                 buffer->element[element].addr = hdr;
4015                 buffer->element[element].length = sizeof(struct qeth_hdr) +
4016                                                         hd_len;
4017                 buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
4018                 buf->is_header[element] = 1;
4019                 buf->next_element_to_fill++;
4020         }
4021
4022         __qeth_fill_buffer(skb, buffer, large_send,
4023                 (int *)&buf->next_element_to_fill, offset);
4024
4025         if (!queue->do_pack) {
4026                 QETH_CARD_TEXT(queue->card, 6, "fillbfnp");
4027                 /* set state to PRIMED -> will be flushed */
4028                 atomic_set(&buf->state, QETH_QDIO_BUF_PRIMED);
4029                 flush_cnt = 1;
4030         } else {
4031                 QETH_CARD_TEXT(queue->card, 6, "fillbfpa");
4032                 if (queue->card->options.performance_stats)
4033                         queue->card->perf_stats.skbs_sent_pack++;
4034                 if (buf->next_element_to_fill >=
4035                                 QETH_MAX_BUFFER_ELEMENTS(queue->card)) {
4036                         /*
4037                          * packed buffer if full -> set state PRIMED
4038                          * -> will be flushed
4039                          */
4040                         atomic_set(&buf->state, QETH_QDIO_BUF_PRIMED);
4041                         flush_cnt = 1;
4042                 }
4043         }
4044         return flush_cnt;
4045 }
4046
4047 int qeth_do_send_packet_fast(struct qeth_card *card,
4048                 struct qeth_qdio_out_q *queue, struct sk_buff *skb,
4049                 struct qeth_hdr *hdr, int elements_needed,
4050                 int offset, int hd_len)
4051 {
4052         struct qeth_qdio_out_buffer *buffer;
4053         int index;
4054
4055         /* spin until we get the queue ... */
4056         while (atomic_cmpxchg(&queue->state, QETH_OUT_Q_UNLOCKED,
4057                               QETH_OUT_Q_LOCKED) != QETH_OUT_Q_UNLOCKED);
4058         /* ... now we've got the queue */
4059         index = queue->next_buf_to_fill;
4060         buffer = queue->bufs[queue->next_buf_to_fill];
4061         /*
4062          * check if buffer is empty to make sure that we do not 'overtake'
4063          * ourselves and try to fill a buffer that is already primed
4064          */
4065         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4066                 goto out;
4067         queue->next_buf_to_fill = (queue->next_buf_to_fill + 1) %
4068                                           QDIO_MAX_BUFFERS_PER_Q;
4069         atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
4070         qeth_fill_buffer(queue, buffer, skb, hdr, offset, hd_len);
4071         qeth_flush_buffers(queue, index, 1);
4072         return 0;
4073 out:
4074         atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
4075         return -EBUSY;
4076 }
4077 EXPORT_SYMBOL_GPL(qeth_do_send_packet_fast);
4078
4079 int qeth_do_send_packet(struct qeth_card *card, struct qeth_qdio_out_q *queue,
4080                 struct sk_buff *skb, struct qeth_hdr *hdr,
4081                 int elements_needed)
4082 {
4083         struct qeth_qdio_out_buffer *buffer;
4084         int start_index;
4085         int flush_count = 0;
4086         int do_pack = 0;
4087         int tmp;
4088         int rc = 0;
4089
4090         /* spin until we get the queue ... */
4091         while (atomic_cmpxchg(&queue->state, QETH_OUT_Q_UNLOCKED,
4092                               QETH_OUT_Q_LOCKED) != QETH_OUT_Q_UNLOCKED);
4093         start_index = queue->next_buf_to_fill;
4094         buffer = queue->bufs[queue->next_buf_to_fill];
4095         /*
4096          * check if buffer is empty to make sure that we do not 'overtake'
4097          * ourselves and try to fill a buffer that is already primed
4098          */
4099         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY) {
4100                 atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
4101                 return -EBUSY;
4102         }
4103         /* check if we need to switch packing state of this queue */
4104         qeth_switch_to_packing_if_needed(queue);
4105         if (queue->do_pack) {
4106                 do_pack = 1;
4107                 /* does packet fit in current buffer? */
4108                 if ((QETH_MAX_BUFFER_ELEMENTS(card) -
4109                     buffer->next_element_to_fill) < elements_needed) {
4110                         /* ... no -> set state PRIMED */
4111                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4112                         flush_count++;
4113                         queue->next_buf_to_fill =
4114                                 (queue->next_buf_to_fill + 1) %
4115                                 QDIO_MAX_BUFFERS_PER_Q;
4116                         buffer = queue->bufs[queue->next_buf_to_fill];
4117                         /* we did a step forward, so check buffer state
4118                          * again */
4119                         if (atomic_read(&buffer->state) !=
4120                             QETH_QDIO_BUF_EMPTY) {
4121                                 qeth_flush_buffers(queue, start_index,
4122                                                            flush_count);
4123                                 atomic_set(&queue->state,
4124                                                 QETH_OUT_Q_UNLOCKED);
4125                                 return -EBUSY;
4126                         }
4127                 }
4128         }
4129         tmp = qeth_fill_buffer(queue, buffer, skb, hdr, -1, 0);
4130         queue->next_buf_to_fill = (queue->next_buf_to_fill + tmp) %
4131                                   QDIO_MAX_BUFFERS_PER_Q;
4132         flush_count += tmp;
4133         if (flush_count)
4134                 qeth_flush_buffers(queue, start_index, flush_count);
4135         else if (!atomic_read(&queue->set_pci_flags_count))
4136                 atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH);
4137         /*
4138          * queue->state will go from LOCKED -> UNLOCKED or from
4139          * LOCKED_FLUSH -> LOCKED if output_handler wanted to 'notify' us
4140          * (switch packing state or flush buffer to get another pci flag out).
4141          * In that case we will enter this loop
4142          */
4143         while (atomic_dec_return(&queue->state)) {
4144                 flush_count = 0;
4145                 start_index = queue->next_buf_to_fill;
4146                 /* check if we can go back to non-packing state */
4147                 flush_count += qeth_switch_to_nonpacking_if_needed(queue);
4148                 /*
4149                  * check if we need to flush a packing buffer to get a pci
4150                  * flag out on the queue
4151                  */
4152                 if (!flush_count && !atomic_read(&queue->set_pci_flags_count))
4153                         flush_count += qeth_flush_buffers_on_no_pci(queue);
4154                 if (flush_count)
4155                         qeth_flush_buffers(queue, start_index, flush_count);
4156         }
4157         /* at this point the queue is UNLOCKED again */
4158         if (queue->card->options.performance_stats && do_pack)
4159                 queue->card->perf_stats.bufs_sent_pack += flush_count;
4160
4161         return rc;
4162 }
4163 EXPORT_SYMBOL_GPL(qeth_do_send_packet);
4164
4165 static int qeth_setadp_promisc_mode_cb(struct qeth_card *card,
4166                 struct qeth_reply *reply, unsigned long data)
4167 {
4168         struct qeth_ipa_cmd *cmd;
4169         struct qeth_ipacmd_setadpparms *setparms;
4170
4171         QETH_CARD_TEXT(card, 4, "prmadpcb");
4172
4173         cmd = (struct qeth_ipa_cmd *) data;
4174         setparms = &(cmd->data.setadapterparms);
4175
4176         qeth_default_setadapterparms_cb(card, reply, (unsigned long)cmd);
4177         if (cmd->hdr.return_code) {
4178                 QETH_CARD_TEXT_(card, 4, "prmrc%x", cmd->hdr.return_code);
4179                 setparms->data.mode = SET_PROMISC_MODE_OFF;
4180         }
4181         card->info.promisc_mode = setparms->data.mode;
4182         return 0;
4183 }
4184
4185 void qeth_setadp_promisc_mode(struct qeth_card *card)
4186 {
4187         enum qeth_ipa_promisc_modes mode;
4188         struct net_device *dev = card->dev;
4189         struct qeth_cmd_buffer *iob;
4190         struct qeth_ipa_cmd *cmd;
4191
4192         QETH_CARD_TEXT(card, 4, "setprom");
4193
4194         if (((dev->flags & IFF_PROMISC) &&
4195              (card->info.promisc_mode == SET_PROMISC_MODE_ON)) ||
4196             (!(dev->flags & IFF_PROMISC) &&
4197              (card->info.promisc_mode == SET_PROMISC_MODE_OFF)))
4198                 return;
4199         mode = SET_PROMISC_MODE_OFF;
4200         if (dev->flags & IFF_PROMISC)
4201                 mode = SET_PROMISC_MODE_ON;
4202         QETH_CARD_TEXT_(card, 4, "mode:%x", mode);
4203
4204         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE,
4205                         sizeof(struct qeth_ipacmd_setadpparms_hdr) + 8);
4206         if (!iob)
4207                 return;
4208         cmd = (struct qeth_ipa_cmd *)(iob->data + IPA_PDU_HEADER_SIZE);
4209         cmd->data.setadapterparms.data.mode = mode;
4210         qeth_send_ipa_cmd(card, iob, qeth_setadp_promisc_mode_cb, NULL);
4211 }
4212 EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode);
4213
4214 int qeth_change_mtu(struct net_device *dev, int new_mtu)
4215 {
4216         struct qeth_card *card;
4217         char dbf_text[15];
4218
4219         card = dev->ml_priv;
4220
4221         QETH_CARD_TEXT(card, 4, "chgmtu");
4222         sprintf(dbf_text, "%8x", new_mtu);
4223         QETH_CARD_TEXT(card, 4, dbf_text);
4224
4225         if (new_mtu < 64)
4226                 return -EINVAL;
4227         if (new_mtu > 65535)
4228                 return -EINVAL;
4229         if ((!qeth_is_supported(card, IPA_IP_FRAGMENTATION)) &&
4230             (!qeth_mtu_is_valid(card, new_mtu)))
4231                 return -EINVAL;
4232         dev->mtu = new_mtu;
4233         return 0;
4234 }
4235 EXPORT_SYMBOL_GPL(qeth_change_mtu);
4236
4237 struct net_device_stats *qeth_get_stats(struct net_device *dev)
4238 {
4239         struct qeth_card *card;
4240
4241         card = dev->ml_priv;
4242
4243         QETH_CARD_TEXT(card, 5, "getstat");
4244
4245         return &card->stats;
4246 }
4247 EXPORT_SYMBOL_GPL(qeth_get_stats);
4248
4249 static int qeth_setadpparms_change_macaddr_cb(struct qeth_card *card,
4250                 struct qeth_reply *reply, unsigned long data)
4251 {
4252         struct qeth_ipa_cmd *cmd;
4253
4254         QETH_CARD_TEXT(card, 4, "chgmaccb");
4255
4256         cmd = (struct qeth_ipa_cmd *) data;
4257         if (!card->options.layer2 ||
4258             !(card->info.mac_bits & QETH_LAYER2_MAC_READ)) {
4259                 memcpy(card->dev->dev_addr,
4260                        &cmd->data.setadapterparms.data.change_addr.addr,
4261                        OSA_ADDR_LEN);
4262                 card->info.mac_bits |= QETH_LAYER2_MAC_READ;
4263         }
4264         qeth_default_setadapterparms_cb(card, reply, (unsigned long) cmd);
4265         return 0;
4266 }
4267
4268 int qeth_setadpparms_change_macaddr(struct qeth_card *card)
4269 {
4270         int rc;
4271         struct qeth_cmd_buffer *iob;
4272         struct qeth_ipa_cmd *cmd;
4273
4274         QETH_CARD_TEXT(card, 4, "chgmac");
4275
4276         iob = qeth_get_adapter_cmd(card, IPA_SETADP_ALTER_MAC_ADDRESS,
4277                                    sizeof(struct qeth_ipacmd_setadpparms_hdr) +
4278                                    sizeof(struct qeth_change_addr));
4279         if (!iob)
4280                 return -ENOMEM;
4281         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
4282         cmd->data.setadapterparms.data.change_addr.cmd = CHANGE_ADDR_READ_MAC;
4283         cmd->data.setadapterparms.data.change_addr.addr_size = OSA_ADDR_LEN;
4284         memcpy(&cmd->data.setadapterparms.data.change_addr.addr,
4285                card->dev->dev_addr, OSA_ADDR_LEN);
4286         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_change_macaddr_cb,
4287                                NULL);
4288         return rc;
4289 }
4290 EXPORT_SYMBOL_GPL(qeth_setadpparms_change_macaddr);
4291
4292 static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card,
4293                 struct qeth_reply *reply, unsigned long data)
4294 {
4295         struct qeth_ipa_cmd *cmd;
4296         struct qeth_set_access_ctrl *access_ctrl_req;
4297         int fallback = *(int *)reply->param;
4298
4299         QETH_CARD_TEXT(card, 4, "setaccb");
4300
4301         cmd = (struct qeth_ipa_cmd *) data;
4302         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4303         QETH_DBF_TEXT_(SETUP, 2, "setaccb");
4304         QETH_DBF_TEXT_(SETUP, 2, "%s", card->gdev->dev.kobj.name);
4305         QETH_DBF_TEXT_(SETUP, 2, "rc=%d",
4306                 cmd->data.setadapterparms.hdr.return_code);
4307         if (cmd->data.setadapterparms.hdr.return_code !=
4308                                                 SET_ACCESS_CTRL_RC_SUCCESS)
4309                 QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%s,%d)==%d\n",
4310                                 card->gdev->dev.kobj.name,
4311                                 access_ctrl_req->subcmd_code,
4312                                 cmd->data.setadapterparms.hdr.return_code);
4313         switch (cmd->data.setadapterparms.hdr.return_code) {
4314         case SET_ACCESS_CTRL_RC_SUCCESS:
4315                 if (card->options.isolation == ISOLATION_MODE_NONE) {
4316                         dev_info(&card->gdev->dev,
4317                             "QDIO data connection isolation is deactivated\n");
4318                 } else {
4319                         dev_info(&card->gdev->dev,
4320                             "QDIO data connection isolation is activated\n");
4321                 }
4322                 break;
4323         case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
4324                 QETH_DBF_MESSAGE(2, "%s QDIO data connection isolation already "
4325                                 "deactivated\n", dev_name(&card->gdev->dev));
4326                 if (fallback)
4327                         card->options.isolation = card->options.prev_isolation;
4328                 break;
4329         case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
4330                 QETH_DBF_MESSAGE(2, "%s QDIO data connection isolation already"
4331                                 " activated\n", dev_name(&card->gdev->dev));
4332                 if (fallback)
4333                         card->options.isolation = card->options.prev_isolation;
4334                 break;
4335         case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
4336                 dev_err(&card->gdev->dev, "Adapter does not "
4337                         "support QDIO data connection isolation\n");
4338                 break;
4339         case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
4340                 dev_err(&card->gdev->dev,
4341                         "Adapter is dedicated. "
4342                         "QDIO data connection isolation not supported\n");
4343                 if (fallback)
4344                         card->options.isolation = card->options.prev_isolation;
4345                 break;
4346         case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
4347                 dev_err(&card->gdev->dev,
4348                         "TSO does not permit QDIO data connection isolation\n");
4349                 if (fallback)
4350                         card->options.isolation = card->options.prev_isolation;
4351                 break;
4352         case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED:
4353                 dev_err(&card->gdev->dev, "The adjacent switch port does not "
4354                         "support reflective relay mode\n");
4355                 if (fallback)
4356                         card->options.isolation = card->options.prev_isolation;
4357                 break;
4358         case SET_ACCESS_CTRL_RC_REFLREL_FAILED:
4359                 dev_err(&card->gdev->dev, "The reflective relay mode cannot be "
4360                                         "enabled at the adjacent switch port");
4361                 if (fallback)
4362                         card->options.isolation = card->options.prev_isolation;
4363                 break;
4364         case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED:
4365                 dev_warn(&card->gdev->dev, "Turning off reflective relay mode "
4366                                         "at the adjacent switch failed\n");
4367                 break;
4368         default:
4369                 /* this should never happen */
4370                 if (fallback)
4371                         card->options.isolation = card->options.prev_isolation;
4372                 break;
4373         }
4374         qeth_default_setadapterparms_cb(card, reply, (unsigned long) cmd);
4375         return 0;
4376 }
4377
4378 static int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
4379                 enum qeth_ipa_isolation_modes isolation, int fallback)
4380 {
4381         int rc;
4382         struct qeth_cmd_buffer *iob;
4383         struct qeth_ipa_cmd *cmd;
4384         struct qeth_set_access_ctrl *access_ctrl_req;
4385
4386         QETH_CARD_TEXT(card, 4, "setacctl");
4387
4388         QETH_DBF_TEXT_(SETUP, 2, "setacctl");
4389         QETH_DBF_TEXT_(SETUP, 2, "%s", card->gdev->dev.kobj.name);
4390
4391         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL,
4392                                    sizeof(struct qeth_ipacmd_setadpparms_hdr) +
4393                                    sizeof(struct qeth_set_access_ctrl));
4394         if (!iob)
4395                 return -ENOMEM;
4396         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
4397         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4398         access_ctrl_req->subcmd_code = isolation;
4399
4400         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb,
4401                                &fallback);
4402         QETH_DBF_TEXT_(SETUP, 2, "rc=%d", rc);
4403         return rc;
4404 }
4405
4406 int qeth_set_access_ctrl_online(struct qeth_card *card, int fallback)
4407 {
4408         int rc = 0;
4409
4410         QETH_CARD_TEXT(card, 4, "setactlo");
4411
4412         if ((card->info.type == QETH_CARD_TYPE_OSD ||
4413              card->info.type == QETH_CARD_TYPE_OSX) &&
4414              qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) {
4415                 rc = qeth_setadpparms_set_access_ctrl(card,
4416                         card->options.isolation, fallback);
4417                 if (rc) {
4418                         QETH_DBF_MESSAGE(3,
4419                                 "IPA(SET_ACCESS_CTRL,%s,%d) sent failed\n",
4420                                 card->gdev->dev.kobj.name,
4421                                 rc);
4422                         rc = -EOPNOTSUPP;
4423                 }
4424         } else if (card->options.isolation != ISOLATION_MODE_NONE) {
4425                 card->options.isolation = ISOLATION_MODE_NONE;
4426
4427                 dev_err(&card->gdev->dev, "Adapter does not "
4428                         "support QDIO data connection isolation\n");
4429                 rc = -EOPNOTSUPP;
4430         }
4431         return rc;
4432 }
4433 EXPORT_SYMBOL_GPL(qeth_set_access_ctrl_online);
4434
4435 void qeth_tx_timeout(struct net_device *dev)
4436 {
4437         struct qeth_card *card;
4438
4439         card = dev->ml_priv;
4440         QETH_CARD_TEXT(card, 4, "txtimeo");
4441         card->stats.tx_errors++;
4442         qeth_schedule_recovery(card);
4443 }
4444 EXPORT_SYMBOL_GPL(qeth_tx_timeout);
4445
4446 int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum)
4447 {
4448         struct qeth_card *card = dev->ml_priv;
4449         int rc = 0;
4450
4451         switch (regnum) {
4452         case MII_BMCR: /* Basic mode control register */
4453                 rc = BMCR_FULLDPLX;
4454                 if ((card->info.link_type != QETH_LINK_TYPE_GBIT_ETH) &&
4455                     (card->info.link_type != QETH_LINK_TYPE_OSN) &&
4456                     (card->info.link_type != QETH_LINK_TYPE_10GBIT_ETH))
4457                         rc |= BMCR_SPEED100;
4458                 break;
4459         case MII_BMSR: /* Basic mode status register */
4460                 rc = BMSR_ERCAP | BMSR_ANEGCOMPLETE | BMSR_LSTATUS |
4461                      BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | BMSR_100FULL |
4462                      BMSR_100BASE4;
4463                 break;
4464         case MII_PHYSID1: /* PHYS ID 1 */
4465                 rc = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 8) |
4466                      dev->dev_addr[2];
4467                 rc = (rc >> 5) & 0xFFFF;
4468                 break;
4469         case MII_PHYSID2: /* PHYS ID 2 */
4470                 rc = (dev->dev_addr[2] << 10) & 0xFFFF;
4471                 break;
4472         case MII_ADVERTISE: /* Advertisement control reg */
4473                 rc = ADVERTISE_ALL;
4474                 break;
4475         case MII_LPA: /* Link partner ability reg */
4476                 rc = LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL |
4477                      LPA_100BASE4 | LPA_LPACK;
4478                 break;
4479         case MII_EXPANSION: /* Expansion register */
4480                 break;
4481         case MII_DCOUNTER: /* disconnect counter */
4482                 break;
4483         case MII_FCSCOUNTER: /* false carrier counter */
4484                 break;
4485         case MII_NWAYTEST: /* N-way auto-neg test register */
4486                 break;
4487         case MII_RERRCOUNTER: /* rx error counter */
4488                 rc = card->stats.rx_errors;
4489                 break;
4490         case MII_SREVISION: /* silicon revision */
4491                 break;
4492         case MII_RESV1: /* reserved 1 */
4493                 break;
4494         case MII_LBRERROR: /* loopback, rx, bypass error */
4495                 break;
4496         case MII_PHYADDR: /* physical address */
4497                 break;
4498         case MII_RESV2: /* reserved 2 */
4499                 break;
4500         case MII_TPISTATUS: /* TPI status for 10mbps */
4501                 break;
4502         case MII_NCONFIG: /* network interface config */
4503                 break;
4504         default:
4505                 break;
4506         }
4507         return rc;
4508 }
4509 EXPORT_SYMBOL_GPL(qeth_mdio_read);
4510
4511 static int qeth_send_ipa_snmp_cmd(struct qeth_card *card,
4512                 struct qeth_cmd_buffer *iob, int len,
4513                 int (*reply_cb)(struct qeth_card *, struct qeth_reply *,
4514                         unsigned long),
4515                 void *reply_param)
4516 {
4517         u16 s1, s2;
4518
4519         QETH_CARD_TEXT(card, 4, "sendsnmp");
4520
4521         memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
4522         memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
4523                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
4524         /* adjust PDU length fields in IPA_PDU_HEADER */
4525         s1 = (u32) IPA_PDU_HEADER_SIZE + len;
4526         s2 = (u32) len;
4527         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
4528         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
4529         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
4530         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
4531         return qeth_send_control_data(card, IPA_PDU_HEADER_SIZE + len, iob,
4532                                       reply_cb, reply_param);
4533 }
4534
4535 static int qeth_snmp_command_cb(struct qeth_card *card,
4536                 struct qeth_reply *reply, unsigned long sdata)
4537 {
4538         struct qeth_ipa_cmd *cmd;
4539         struct qeth_arp_query_info *qinfo;
4540         unsigned char *data;
4541         void *snmp_data;
4542         __u16 data_len;
4543
4544         QETH_CARD_TEXT(card, 3, "snpcmdcb");
4545
4546         cmd = (struct qeth_ipa_cmd *) sdata;
4547         data = (unsigned char *)((char *)cmd - reply->offset);
4548         qinfo = (struct qeth_arp_query_info *) reply->param;
4549
4550         if (cmd->hdr.return_code) {
4551                 QETH_CARD_TEXT_(card, 4, "scer1%x", cmd->hdr.return_code);
4552                 return 0;
4553         }
4554         if (cmd->data.setadapterparms.hdr.return_code) {
4555                 cmd->hdr.return_code =
4556                         cmd->data.setadapterparms.hdr.return_code;
4557                 QETH_CARD_TEXT_(card, 4, "scer2%x", cmd->hdr.return_code);
4558                 return 0;
4559         }
4560         data_len = *((__u16 *)QETH_IPA_PDU_LEN_PDU1(data));
4561         if (cmd->data.setadapterparms.hdr.seq_no == 1) {
4562                 snmp_data = &cmd->data.setadapterparms.data.snmp;
4563                 data_len -= offsetof(struct qeth_ipa_cmd,
4564                                      data.setadapterparms.data.snmp);
4565         } else {
4566                 snmp_data = &cmd->data.setadapterparms.data.snmp.request;
4567                 data_len -= offsetof(struct qeth_ipa_cmd,
4568                                      data.setadapterparms.data.snmp.request);
4569         }
4570
4571         /* check if there is enough room in userspace */
4572         if ((qinfo->udata_len - qinfo->udata_offset) < data_len) {
4573                 QETH_CARD_TEXT_(card, 4, "scer3%i", -ENOMEM);
4574                 cmd->hdr.return_code = IPA_RC_ENOMEM;
4575                 return 0;
4576         }
4577         QETH_CARD_TEXT_(card, 4, "snore%i",
4578                        cmd->data.setadapterparms.hdr.used_total);
4579         QETH_CARD_TEXT_(card, 4, "sseqn%i",
4580                 cmd->data.setadapterparms.hdr.seq_no);
4581         /*copy entries to user buffer*/
4582         memcpy(qinfo->udata + qinfo->udata_offset, snmp_data, data_len);
4583         qinfo->udata_offset += data_len;
4584
4585         /* check if all replies received ... */
4586                 QETH_CARD_TEXT_(card, 4, "srtot%i",
4587                                cmd->data.setadapterparms.hdr.used_total);
4588                 QETH_CARD_TEXT_(card, 4, "srseq%i",
4589                                cmd->data.setadapterparms.hdr.seq_no);
4590         if (cmd->data.setadapterparms.hdr.seq_no <
4591             cmd->data.setadapterparms.hdr.used_total)
4592                 return 1;
4593         return 0;
4594 }
4595
4596 int qeth_snmp_command(struct qeth_card *card, char __user *udata)
4597 {
4598         struct qeth_cmd_buffer *iob;
4599         struct qeth_ipa_cmd *cmd;
4600         struct qeth_snmp_ureq *ureq;
4601         unsigned int req_len;
4602         struct qeth_arp_query_info qinfo = {0, };
4603         int rc = 0;
4604
4605         QETH_CARD_TEXT(card, 3, "snmpcmd");
4606
4607         if (card->info.guestlan)
4608                 return -EOPNOTSUPP;
4609
4610         if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) &&
4611             (!card->options.layer2)) {
4612                 return -EOPNOTSUPP;
4613         }
4614         /* skip 4 bytes (data_len struct member) to get req_len */
4615         if (copy_from_user(&req_len, udata + sizeof(int), sizeof(int)))
4616                 return -EFAULT;
4617         if (req_len > (QETH_BUFSIZE - IPA_PDU_HEADER_SIZE -
4618                        sizeof(struct qeth_ipacmd_hdr) -
4619                        sizeof(struct qeth_ipacmd_setadpparms_hdr)))
4620                 return -EINVAL;
4621         ureq = memdup_user(udata, req_len + sizeof(struct qeth_snmp_ureq_hdr));
4622         if (IS_ERR(ureq)) {
4623                 QETH_CARD_TEXT(card, 2, "snmpnome");
4624                 return PTR_ERR(ureq);
4625         }
4626         qinfo.udata_len = ureq->hdr.data_len;
4627         qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
4628         if (!qinfo.udata) {
4629                 kfree(ureq);
4630                 return -ENOMEM;
4631         }
4632         qinfo.udata_offset = sizeof(struct qeth_snmp_ureq_hdr);
4633
4634         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL,
4635                                    QETH_SNMP_SETADP_CMDLENGTH + req_len);
4636         if (!iob) {
4637                 rc = -ENOMEM;
4638                 goto out;
4639         }
4640         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
4641         memcpy(&cmd->data.setadapterparms.data.snmp, &ureq->cmd, req_len);
4642         rc = qeth_send_ipa_snmp_cmd(card, iob, QETH_SETADP_BASE_LEN + req_len,
4643                                     qeth_snmp_command_cb, (void *)&qinfo);
4644         if (rc)
4645                 QETH_DBF_MESSAGE(2, "SNMP command failed on %s: (0x%x)\n",
4646                            QETH_CARD_IFNAME(card), rc);
4647         else {
4648                 if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
4649                         rc = -EFAULT;
4650         }
4651 out:
4652         kfree(ureq);
4653         kfree(qinfo.udata);
4654         return rc;
4655 }
4656 EXPORT_SYMBOL_GPL(qeth_snmp_command);
4657
4658 static int qeth_setadpparms_query_oat_cb(struct qeth_card *card,
4659                 struct qeth_reply *reply, unsigned long data)
4660 {
4661         struct qeth_ipa_cmd *cmd;
4662         struct qeth_qoat_priv *priv;
4663         char *resdata;
4664         int resdatalen;
4665
4666         QETH_CARD_TEXT(card, 3, "qoatcb");
4667
4668         cmd = (struct qeth_ipa_cmd *)data;
4669         priv = (struct qeth_qoat_priv *)reply->param;
4670         resdatalen = cmd->data.setadapterparms.hdr.cmdlength;
4671         resdata = (char *)data + 28;
4672
4673         if (resdatalen > (priv->buffer_len - priv->response_len)) {
4674                 cmd->hdr.return_code = IPA_RC_FFFF;
4675                 return 0;
4676         }
4677
4678         memcpy((priv->buffer + priv->response_len), resdata,
4679                 resdatalen);
4680         priv->response_len += resdatalen;
4681
4682         if (cmd->data.setadapterparms.hdr.seq_no <
4683             cmd->data.setadapterparms.hdr.used_total)
4684                 return 1;
4685         return 0;
4686 }
4687
4688 int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
4689 {
4690         int rc = 0;
4691         struct qeth_cmd_buffer *iob;
4692         struct qeth_ipa_cmd *cmd;
4693         struct qeth_query_oat *oat_req;
4694         struct qeth_query_oat_data oat_data;
4695         struct qeth_qoat_priv priv;
4696         void __user *tmp;
4697
4698         QETH_CARD_TEXT(card, 3, "qoatcmd");
4699
4700         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT)) {
4701                 rc = -EOPNOTSUPP;
4702                 goto out;
4703         }
4704
4705         if (copy_from_user(&oat_data, udata,
4706             sizeof(struct qeth_query_oat_data))) {
4707                         rc = -EFAULT;
4708                         goto out;
4709         }
4710
4711         priv.buffer_len = oat_data.buffer_len;
4712         priv.response_len = 0;
4713         priv.buffer = vzalloc(oat_data.buffer_len);
4714         if (!priv.buffer) {
4715                 rc = -ENOMEM;
4716                 goto out;
4717         }
4718
4719         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4720                                    sizeof(struct qeth_ipacmd_setadpparms_hdr) +
4721                                    sizeof(struct qeth_query_oat));
4722         if (!iob) {
4723                 rc = -ENOMEM;
4724                 goto out_free;
4725         }
4726         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
4727         oat_req = &cmd->data.setadapterparms.data.query_oat;
4728         oat_req->subcmd_code = oat_data.command;
4729
4730         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb,
4731                                &priv);
4732         if (!rc) {
4733                 if (is_compat_task())
4734                         tmp = compat_ptr(oat_data.ptr);
4735                 else
4736                         tmp = (void __user *)(unsigned long)oat_data.ptr;
4737
4738                 if (copy_to_user(tmp, priv.buffer,
4739                     priv.response_len)) {
4740                         rc = -EFAULT;
4741                         goto out_free;
4742                 }
4743
4744                 oat_data.response_len = priv.response_len;
4745
4746                 if (copy_to_user(udata, &oat_data,
4747                     sizeof(struct qeth_query_oat_data)))
4748                         rc = -EFAULT;
4749         } else
4750                 if (rc == IPA_RC_FFFF)
4751                         rc = -EFAULT;
4752
4753 out_free:
4754         vfree(priv.buffer);
4755 out:
4756         return rc;
4757 }
4758 EXPORT_SYMBOL_GPL(qeth_query_oat_command);
4759
4760 static int qeth_query_card_info_cb(struct qeth_card *card,
4761                                    struct qeth_reply *reply, unsigned long data)
4762 {
4763         struct qeth_ipa_cmd *cmd;
4764         struct qeth_query_card_info *card_info;
4765         struct carrier_info *carrier_info;
4766
4767         QETH_CARD_TEXT(card, 2, "qcrdincb");
4768         carrier_info = (struct carrier_info *)reply->param;
4769         cmd = (struct qeth_ipa_cmd *)data;
4770         card_info = &cmd->data.setadapterparms.data.card_info;
4771         if (cmd->data.setadapterparms.hdr.return_code == 0) {
4772                 carrier_info->card_type = card_info->card_type;
4773                 carrier_info->port_mode = card_info->port_mode;
4774                 carrier_info->port_speed = card_info->port_speed;
4775         }
4776
4777         qeth_default_setadapterparms_cb(card, reply, (unsigned long) cmd);
4778         return 0;
4779 }
4780
4781 static int qeth_query_card_info(struct qeth_card *card,
4782                                 struct carrier_info *carrier_info)
4783 {
4784         struct qeth_cmd_buffer *iob;
4785
4786         QETH_CARD_TEXT(card, 2, "qcrdinfo");
4787         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_CARD_INFO))
4788                 return -EOPNOTSUPP;
4789         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_CARD_INFO,
4790                 sizeof(struct qeth_ipacmd_setadpparms_hdr));
4791         if (!iob)
4792                 return -ENOMEM;
4793         return qeth_send_ipa_cmd(card, iob, qeth_query_card_info_cb,
4794                                         (void *)carrier_info);
4795 }
4796
4797 static inline int qeth_get_qdio_q_format(struct qeth_card *card)
4798 {
4799         switch (card->info.type) {
4800         case QETH_CARD_TYPE_IQD:
4801                 return 2;
4802         default:
4803                 return 0;
4804         }
4805 }
4806
4807 static void qeth_determine_capabilities(struct qeth_card *card)
4808 {
4809         int rc;
4810         int length;
4811         char *prcd;
4812         struct ccw_device *ddev;
4813         int ddev_offline = 0;
4814
4815         QETH_DBF_TEXT(SETUP, 2, "detcapab");
4816         ddev = CARD_DDEV(card);
4817         if (!ddev->online) {
4818                 ddev_offline = 1;
4819                 rc = ccw_device_set_online(ddev);
4820                 if (rc) {
4821                         QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
4822                         goto out;
4823                 }
4824         }
4825
4826         rc = qeth_read_conf_data(card, (void **) &prcd, &length);
4827         if (rc) {
4828                 QETH_DBF_MESSAGE(2, "%s qeth_read_conf_data returned %i\n",
4829                         dev_name(&card->gdev->dev), rc);
4830                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
4831                 goto out_offline;
4832         }
4833         qeth_configure_unitaddr(card, prcd);
4834         if (ddev_offline)
4835                 qeth_configure_blkt_default(card, prcd);
4836         kfree(prcd);
4837
4838         rc = qdio_get_ssqd_desc(ddev, &card->ssqd);
4839         if (rc)
4840                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
4841
4842         QETH_DBF_TEXT_(SETUP, 2, "qfmt%d", card->ssqd.qfmt);
4843         QETH_DBF_TEXT_(SETUP, 2, "%d", card->ssqd.qdioac1);
4844         QETH_DBF_TEXT_(SETUP, 2, "%d", card->ssqd.qdioac3);
4845         QETH_DBF_TEXT_(SETUP, 2, "icnt%d", card->ssqd.icnt);
4846         if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) ||
4847             ((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) ||
4848             ((card->ssqd.qdioac3 & CHSC_AC3_FORMAT2_CQ_AVAILABLE) == 0))) {
4849                 dev_info(&card->gdev->dev,
4850                         "Completion Queueing supported\n");
4851         } else {
4852                 card->options.cq = QETH_CQ_NOTAVAILABLE;
4853         }
4854
4855
4856 out_offline:
4857         if (ddev_offline == 1)
4858                 ccw_device_set_offline(ddev);
4859 out:
4860         return;
4861 }
4862
4863 static inline void qeth_qdio_establish_cq(struct qeth_card *card,
4864         struct qdio_buffer **in_sbal_ptrs,
4865         void (**queue_start_poll) (struct ccw_device *, int, unsigned long)) {
4866         int i;
4867
4868         if (card->options.cq == QETH_CQ_ENABLED) {
4869                 int offset = QDIO_MAX_BUFFERS_PER_Q *
4870                              (card->qdio.no_in_queues - 1);
4871                 i = QDIO_MAX_BUFFERS_PER_Q * (card->qdio.no_in_queues - 1);
4872                 for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i) {
4873                         in_sbal_ptrs[offset + i] = (struct qdio_buffer *)
4874                                 virt_to_phys(card->qdio.c_q->bufs[i].buffer);
4875                 }
4876
4877                 queue_start_poll[card->qdio.no_in_queues - 1] = NULL;
4878         }
4879 }
4880
4881 static int qeth_qdio_establish(struct qeth_card *card)
4882 {
4883         struct qdio_initialize init_data;
4884         char *qib_param_field;
4885         struct qdio_buffer **in_sbal_ptrs;
4886         void (**queue_start_poll) (struct ccw_device *, int, unsigned long);
4887         struct qdio_buffer **out_sbal_ptrs;
4888         int i, j, k;
4889         int rc = 0;
4890
4891         QETH_DBF_TEXT(SETUP, 2, "qdioest");
4892
4893         qib_param_field = kzalloc(QDIO_MAX_BUFFERS_PER_Q * sizeof(char),
4894                               GFP_KERNEL);
4895         if (!qib_param_field) {
4896                 rc =  -ENOMEM;
4897                 goto out_free_nothing;
4898         }
4899
4900         qeth_create_qib_param_field(card, qib_param_field);
4901         qeth_create_qib_param_field_blkt(card, qib_param_field);
4902
4903         in_sbal_ptrs = kzalloc(card->qdio.no_in_queues *
4904                                QDIO_MAX_BUFFERS_PER_Q * sizeof(void *),
4905                                GFP_KERNEL);
4906         if (!in_sbal_ptrs) {
4907                 rc = -ENOMEM;
4908                 goto out_free_qib_param;
4909         }
4910         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i) {
4911                 in_sbal_ptrs[i] = (struct qdio_buffer *)
4912                         virt_to_phys(card->qdio.in_q->bufs[i].buffer);
4913         }
4914
4915         queue_start_poll = kzalloc(sizeof(void *) * card->qdio.no_in_queues,
4916                                    GFP_KERNEL);
4917         if (!queue_start_poll) {
4918                 rc = -ENOMEM;
4919                 goto out_free_in_sbals;
4920         }
4921         for (i = 0; i < card->qdio.no_in_queues; ++i)
4922                 queue_start_poll[i] = card->discipline->start_poll;
4923
4924         qeth_qdio_establish_cq(card, in_sbal_ptrs, queue_start_poll);
4925
4926         out_sbal_ptrs =
4927                 kzalloc(card->qdio.no_out_queues * QDIO_MAX_BUFFERS_PER_Q *
4928                         sizeof(void *), GFP_KERNEL);
4929         if (!out_sbal_ptrs) {
4930                 rc = -ENOMEM;
4931                 goto out_free_queue_start_poll;
4932         }
4933         for (i = 0, k = 0; i < card->qdio.no_out_queues; ++i)
4934                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j, ++k) {
4935                         out_sbal_ptrs[k] = (struct qdio_buffer *)virt_to_phys(
4936                                 card->qdio.out_qs[i]->bufs[j]->buffer);
4937                 }
4938
4939         memset(&init_data, 0, sizeof(struct qdio_initialize));
4940         init_data.cdev                   = CARD_DDEV(card);
4941         init_data.q_format               = qeth_get_qdio_q_format(card);
4942         init_data.qib_param_field_format = 0;
4943         init_data.qib_param_field        = qib_param_field;
4944         init_data.no_input_qs            = card->qdio.no_in_queues;
4945         init_data.no_output_qs           = card->qdio.no_out_queues;
4946         init_data.input_handler          = card->discipline->input_handler;
4947         init_data.output_handler         = card->discipline->output_handler;
4948         init_data.queue_start_poll_array = queue_start_poll;
4949         init_data.int_parm               = (unsigned long) card;
4950         init_data.input_sbal_addr_array  = (void **) in_sbal_ptrs;
4951         init_data.output_sbal_addr_array = (void **) out_sbal_ptrs;
4952         init_data.output_sbal_state_array = card->qdio.out_bufstates;
4953         init_data.scan_threshold =
4954                 (card->info.type == QETH_CARD_TYPE_IQD) ? 1 : 32;
4955
4956         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED,
4957                 QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) {
4958                 rc = qdio_allocate(&init_data);
4959                 if (rc) {
4960                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
4961                         goto out;
4962                 }
4963                 rc = qdio_establish(&init_data);
4964                 if (rc) {
4965                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
4966                         qdio_free(CARD_DDEV(card));
4967                 }
4968         }
4969
4970         switch (card->options.cq) {
4971         case QETH_CQ_ENABLED:
4972                 dev_info(&card->gdev->dev, "Completion Queue support enabled");
4973                 break;
4974         case QETH_CQ_DISABLED:
4975                 dev_info(&card->gdev->dev, "Completion Queue support disabled");
4976                 break;
4977         default:
4978                 break;
4979         }
4980 out:
4981         kfree(out_sbal_ptrs);
4982 out_free_queue_start_poll:
4983         kfree(queue_start_poll);
4984 out_free_in_sbals:
4985         kfree(in_sbal_ptrs);
4986 out_free_qib_param:
4987         kfree(qib_param_field);
4988 out_free_nothing:
4989         return rc;
4990 }
4991
4992 static void qeth_core_free_card(struct qeth_card *card)
4993 {
4994
4995         QETH_DBF_TEXT(SETUP, 2, "freecrd");
4996         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
4997         qeth_clean_channel(&card->read);
4998         qeth_clean_channel(&card->write);
4999         qeth_free_qdio_buffers(card);
5000         unregister_service_level(&card->qeth_service_level);
5001         kfree(card);
5002 }
5003
5004 void qeth_trace_features(struct qeth_card *card)
5005 {
5006         QETH_CARD_TEXT(card, 2, "features");
5007         QETH_CARD_HEX(card, 2, &card->options.ipa4, sizeof(card->options.ipa4));
5008         QETH_CARD_HEX(card, 2, &card->options.ipa6, sizeof(card->options.ipa6));
5009         QETH_CARD_HEX(card, 2, &card->options.adp, sizeof(card->options.adp));
5010         QETH_CARD_HEX(card, 2, &card->info.diagass_support,
5011                       sizeof(card->info.diagass_support));
5012 }
5013 EXPORT_SYMBOL_GPL(qeth_trace_features);
5014
5015 static struct ccw_device_id qeth_ids[] = {
5016         {CCW_DEVICE_DEVTYPE(0x1731, 0x01, 0x1732, 0x01),
5017                                         .driver_info = QETH_CARD_TYPE_OSD},
5018         {CCW_DEVICE_DEVTYPE(0x1731, 0x05, 0x1732, 0x05),
5019                                         .driver_info = QETH_CARD_TYPE_IQD},
5020         {CCW_DEVICE_DEVTYPE(0x1731, 0x06, 0x1732, 0x06),
5021                                         .driver_info = QETH_CARD_TYPE_OSN},
5022         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x03),
5023                                         .driver_info = QETH_CARD_TYPE_OSM},
5024         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x02),
5025                                         .driver_info = QETH_CARD_TYPE_OSX},
5026         {},
5027 };
5028 MODULE_DEVICE_TABLE(ccw, qeth_ids);
5029
5030 static struct ccw_driver qeth_ccw_driver = {
5031         .driver = {
5032                 .owner = THIS_MODULE,
5033                 .name = "qeth",
5034         },
5035         .ids = qeth_ids,
5036         .probe = ccwgroup_probe_ccwdev,
5037         .remove = ccwgroup_remove_ccwdev,
5038 };
5039
5040 int qeth_core_hardsetup_card(struct qeth_card *card)
5041 {
5042         int retries = 3;
5043         int rc;
5044
5045         QETH_DBF_TEXT(SETUP, 2, "hrdsetup");
5046         atomic_set(&card->force_alloc_skb, 0);
5047         qeth_update_from_chp_desc(card);
5048 retry:
5049         if (retries < 3)
5050                 QETH_DBF_MESSAGE(2, "%s Retrying to do IDX activates.\n",
5051                         dev_name(&card->gdev->dev));
5052         rc = qeth_qdio_clear_card(card, card->info.type != QETH_CARD_TYPE_IQD);
5053         ccw_device_set_offline(CARD_DDEV(card));
5054         ccw_device_set_offline(CARD_WDEV(card));
5055         ccw_device_set_offline(CARD_RDEV(card));
5056         qdio_free(CARD_DDEV(card));
5057         rc = ccw_device_set_online(CARD_RDEV(card));
5058         if (rc)
5059                 goto retriable;
5060         rc = ccw_device_set_online(CARD_WDEV(card));
5061         if (rc)
5062                 goto retriable;
5063         rc = ccw_device_set_online(CARD_DDEV(card));
5064         if (rc)
5065                 goto retriable;
5066 retriable:
5067         if (rc == -ERESTARTSYS) {
5068                 QETH_DBF_TEXT(SETUP, 2, "break1");
5069                 return rc;
5070         } else if (rc) {
5071                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
5072                 if (--retries < 0)
5073                         goto out;
5074                 else
5075                         goto retry;
5076         }
5077         qeth_determine_capabilities(card);
5078         qeth_init_tokens(card);
5079         qeth_init_func_level(card);
5080         rc = qeth_idx_activate_channel(&card->read, qeth_idx_read_cb);
5081         if (rc == -ERESTARTSYS) {
5082                 QETH_DBF_TEXT(SETUP, 2, "break2");
5083                 return rc;
5084         } else if (rc) {
5085                 QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
5086                 if (--retries < 0)
5087                         goto out;
5088                 else
5089                         goto retry;
5090         }
5091         rc = qeth_idx_activate_channel(&card->write, qeth_idx_write_cb);
5092         if (rc == -ERESTARTSYS) {
5093                 QETH_DBF_TEXT(SETUP, 2, "break3");
5094                 return rc;
5095         } else if (rc) {
5096                 QETH_DBF_TEXT_(SETUP, 2, "4err%d", rc);
5097                 if (--retries < 0)
5098                         goto out;
5099                 else
5100                         goto retry;
5101         }
5102         card->read_or_write_problem = 0;
5103         rc = qeth_mpc_initialize(card);
5104         if (rc) {
5105                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
5106                 goto out;
5107         }
5108
5109         rc = qeth_send_startlan(card);
5110         if (rc) {
5111                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
5112                 if (rc == IPA_RC_LAN_OFFLINE) {
5113                         dev_warn(&card->gdev->dev,
5114                                 "The LAN is offline\n");
5115                         card->lan_online = 0;
5116                 } else {
5117                         rc = -ENODEV;
5118                         goto out;
5119                 }
5120         } else
5121                 card->lan_online = 1;
5122
5123         card->options.ipa4.supported_funcs = 0;
5124         card->options.ipa6.supported_funcs = 0;
5125         card->options.adp.supported_funcs = 0;
5126         card->options.sbp.supported_funcs = 0;
5127         card->info.diagass_support = 0;
5128         rc = qeth_query_ipassists(card, QETH_PROT_IPV4);
5129         if (rc == -ENOMEM)
5130                 goto out;
5131         if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
5132                 rc = qeth_query_setadapterparms(card);
5133                 if (rc < 0) {
5134                         QETH_DBF_TEXT_(SETUP, 2, "7err%d", rc);
5135                         goto out;
5136                 }
5137         }
5138         if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
5139                 rc = qeth_query_setdiagass(card);
5140                 if (rc < 0) {
5141                         QETH_DBF_TEXT_(SETUP, 2, "8err%d", rc);
5142                         goto out;
5143                 }
5144         }
5145         return 0;
5146 out:
5147         dev_warn(&card->gdev->dev, "The qeth device driver failed to recover "
5148                 "an error on the device\n");
5149         QETH_DBF_MESSAGE(2, "%s Initialization in hardsetup failed! rc=%d\n",
5150                 dev_name(&card->gdev->dev), rc);
5151         return rc;
5152 }
5153 EXPORT_SYMBOL_GPL(qeth_core_hardsetup_card);
5154
5155 static inline int qeth_create_skb_frag(struct qeth_qdio_buffer *qethbuffer,
5156                 struct qdio_buffer_element *element,
5157                 struct sk_buff **pskb, int offset, int *pfrag, int data_len)
5158 {
5159         struct page *page = virt_to_page(element->addr);
5160         if (*pskb == NULL) {
5161                 if (qethbuffer->rx_skb) {
5162                         /* only if qeth_card.options.cq == QETH_CQ_ENABLED */
5163                         *pskb = qethbuffer->rx_skb;
5164                         qethbuffer->rx_skb = NULL;
5165                 } else {
5166                         *pskb = dev_alloc_skb(QETH_RX_PULL_LEN + ETH_HLEN);
5167                         if (!(*pskb))
5168                                 return -ENOMEM;
5169                 }
5170
5171                 skb_reserve(*pskb, ETH_HLEN);
5172                 if (data_len <= QETH_RX_PULL_LEN) {
5173                         memcpy(skb_put(*pskb, data_len), element->addr + offset,
5174                                 data_len);
5175                 } else {
5176                         get_page(page);
5177                         memcpy(skb_put(*pskb, QETH_RX_PULL_LEN),
5178                                element->addr + offset, QETH_RX_PULL_LEN);
5179                         skb_fill_page_desc(*pskb, *pfrag, page,
5180                                 offset + QETH_RX_PULL_LEN,
5181                                 data_len - QETH_RX_PULL_LEN);
5182                         (*pskb)->data_len += data_len - QETH_RX_PULL_LEN;
5183                         (*pskb)->len      += data_len - QETH_RX_PULL_LEN;
5184                         (*pskb)->truesize += data_len - QETH_RX_PULL_LEN;
5185                         (*pfrag)++;
5186                 }
5187         } else {
5188                 get_page(page);
5189                 skb_fill_page_desc(*pskb, *pfrag, page, offset, data_len);
5190                 (*pskb)->data_len += data_len;
5191                 (*pskb)->len      += data_len;
5192                 (*pskb)->truesize += data_len;
5193                 (*pfrag)++;
5194         }
5195
5196
5197         return 0;
5198 }
5199
5200 static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale)
5201 {
5202         return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY);
5203 }
5204
5205 struct sk_buff *qeth_core_get_next_skb(struct qeth_card *card,
5206                 struct qeth_qdio_buffer *qethbuffer,
5207                 struct qdio_buffer_element **__element, int *__offset,
5208                 struct qeth_hdr **hdr)
5209 {
5210         struct qdio_buffer_element *element = *__element;
5211         struct qdio_buffer *buffer = qethbuffer->buffer;
5212         int offset = *__offset;
5213         struct sk_buff *skb = NULL;
5214         int skb_len = 0;
5215         void *data_ptr;
5216         int data_len;
5217         int headroom = 0;
5218         int use_rx_sg = 0;
5219         int frag = 0;
5220
5221         /* qeth_hdr must not cross element boundaries */
5222         if (element->length < offset + sizeof(struct qeth_hdr)) {
5223                 if (qeth_is_last_sbale(element))
5224                         return NULL;
5225                 element++;
5226                 offset = 0;
5227                 if (element->length < sizeof(struct qeth_hdr))
5228                         return NULL;
5229         }
5230         *hdr = element->addr + offset;
5231
5232         offset += sizeof(struct qeth_hdr);
5233         switch ((*hdr)->hdr.l2.id) {
5234         case QETH_HEADER_TYPE_LAYER2:
5235                 skb_len = (*hdr)->hdr.l2.pkt_length;
5236                 break;
5237         case QETH_HEADER_TYPE_LAYER3:
5238                 skb_len = (*hdr)->hdr.l3.length;
5239                 headroom = ETH_HLEN;
5240                 break;
5241         case QETH_HEADER_TYPE_OSN:
5242                 skb_len = (*hdr)->hdr.osn.pdu_length;
5243                 headroom = sizeof(struct qeth_hdr);
5244                 break;
5245         default:
5246                 break;
5247         }
5248
5249         if (!skb_len)
5250                 return NULL;
5251
5252         if (((skb_len >= card->options.rx_sg_cb) &&
5253              (!(card->info.type == QETH_CARD_TYPE_OSN)) &&
5254              (!atomic_read(&card->force_alloc_skb))) ||
5255             (card->options.cq == QETH_CQ_ENABLED)) {
5256                 use_rx_sg = 1;
5257         } else {
5258                 skb = dev_alloc_skb(skb_len + headroom);
5259                 if (!skb)
5260                         goto no_mem;
5261                 if (headroom)
5262                         skb_reserve(skb, headroom);
5263         }
5264
5265         data_ptr = element->addr + offset;
5266         while (skb_len) {
5267                 data_len = min(skb_len, (int)(element->length - offset));
5268                 if (data_len) {
5269                         if (use_rx_sg) {
5270                                 if (qeth_create_skb_frag(qethbuffer, element,
5271                                     &skb, offset, &frag, data_len))
5272                                         goto no_mem;
5273                         } else {
5274                                 memcpy(skb_put(skb, data_len), data_ptr,
5275                                         data_len);
5276                         }
5277                 }
5278                 skb_len -= data_len;
5279                 if (skb_len) {
5280                         if (qeth_is_last_sbale(element)) {
5281                                 QETH_CARD_TEXT(card, 4, "unexeob");
5282                                 QETH_CARD_HEX(card, 2, buffer, sizeof(void *));
5283                                 dev_kfree_skb_any(skb);
5284                                 card->stats.rx_errors++;
5285                                 return NULL;
5286                         }
5287                         element++;
5288                         offset = 0;
5289                         data_ptr = element->addr;
5290                 } else {
5291                         offset += data_len;
5292                 }
5293         }
5294         *__element = element;
5295         *__offset = offset;
5296         if (use_rx_sg && card->options.performance_stats) {
5297                 card->perf_stats.sg_skbs_rx++;
5298                 card->perf_stats.sg_frags_rx += skb_shinfo(skb)->nr_frags;
5299         }
5300         return skb;
5301 no_mem:
5302         if (net_ratelimit()) {
5303                 QETH_CARD_TEXT(card, 2, "noskbmem");
5304         }
5305         card->stats.rx_dropped++;
5306         return NULL;
5307 }
5308 EXPORT_SYMBOL_GPL(qeth_core_get_next_skb);
5309
5310 int qeth_setassparms_cb(struct qeth_card *card,
5311                         struct qeth_reply *reply, unsigned long data)
5312 {
5313         struct qeth_ipa_cmd *cmd;
5314
5315         QETH_CARD_TEXT(card, 4, "defadpcb");
5316
5317         cmd = (struct qeth_ipa_cmd *) data;
5318         if (cmd->hdr.return_code == 0) {
5319                 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
5320                 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
5321                         card->options.ipa4.enabled_funcs = cmd->hdr.ipa_enabled;
5322                 if (cmd->hdr.prot_version == QETH_PROT_IPV6)
5323                         card->options.ipa6.enabled_funcs = cmd->hdr.ipa_enabled;
5324         }
5325         if (cmd->data.setassparms.hdr.assist_no == IPA_INBOUND_CHECKSUM &&
5326             cmd->data.setassparms.hdr.command_code == IPA_CMD_ASS_START) {
5327                 card->info.csum_mask = cmd->data.setassparms.data.flags_32bit;
5328                 QETH_CARD_TEXT_(card, 3, "csum:%d", card->info.csum_mask);
5329         }
5330         if (cmd->data.setassparms.hdr.assist_no == IPA_OUTBOUND_CHECKSUM &&
5331             cmd->data.setassparms.hdr.command_code == IPA_CMD_ASS_START) {
5332                 card->info.tx_csum_mask =
5333                         cmd->data.setassparms.data.flags_32bit;
5334                 QETH_CARD_TEXT_(card, 3, "tcsu:%d", card->info.tx_csum_mask);
5335         }
5336
5337         return 0;
5338 }
5339 EXPORT_SYMBOL_GPL(qeth_setassparms_cb);
5340
5341 struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card,
5342                                                  enum qeth_ipa_funcs ipa_func,
5343                                                  __u16 cmd_code, __u16 len,
5344                                                  enum qeth_prot_versions prot)
5345 {
5346         struct qeth_cmd_buffer *iob;
5347         struct qeth_ipa_cmd *cmd;
5348
5349         QETH_CARD_TEXT(card, 4, "getasscm");
5350         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SETASSPARMS, prot);
5351
5352         if (iob) {
5353                 cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
5354                 cmd->data.setassparms.hdr.assist_no = ipa_func;
5355                 cmd->data.setassparms.hdr.length = 8 + len;
5356                 cmd->data.setassparms.hdr.command_code = cmd_code;
5357                 cmd->data.setassparms.hdr.return_code = 0;
5358                 cmd->data.setassparms.hdr.seq_no = 0;
5359         }
5360
5361         return iob;
5362 }
5363 EXPORT_SYMBOL_GPL(qeth_get_setassparms_cmd);
5364
5365 int qeth_send_setassparms(struct qeth_card *card,
5366                           struct qeth_cmd_buffer *iob, __u16 len, long data,
5367                           int (*reply_cb)(struct qeth_card *,
5368                                           struct qeth_reply *, unsigned long),
5369                           void *reply_param)
5370 {
5371         int rc;
5372         struct qeth_ipa_cmd *cmd;
5373
5374         QETH_CARD_TEXT(card, 4, "sendassp");
5375
5376         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
5377         if (len <= sizeof(__u32))
5378                 cmd->data.setassparms.data.flags_32bit = (__u32) data;
5379         else   /* (len > sizeof(__u32)) */
5380                 memcpy(&cmd->data.setassparms.data, (void *) data, len);
5381
5382         rc = qeth_send_ipa_cmd(card, iob, reply_cb, reply_param);
5383         return rc;
5384 }
5385 EXPORT_SYMBOL_GPL(qeth_send_setassparms);
5386
5387 int qeth_send_simple_setassparms(struct qeth_card *card,
5388                                  enum qeth_ipa_funcs ipa_func,
5389                                  __u16 cmd_code, long data)
5390 {
5391         int rc;
5392         int length = 0;
5393         struct qeth_cmd_buffer *iob;
5394
5395         QETH_CARD_TEXT(card, 4, "simassp4");
5396         if (data)
5397                 length = sizeof(__u32);
5398         iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code,
5399                                        length, QETH_PROT_IPV4);
5400         if (!iob)
5401                 return -ENOMEM;
5402         rc = qeth_send_setassparms(card, iob, length, data,
5403                                    qeth_setassparms_cb, NULL);
5404         return rc;
5405 }
5406 EXPORT_SYMBOL_GPL(qeth_send_simple_setassparms);
5407
5408 static void qeth_unregister_dbf_views(void)
5409 {
5410         int x;
5411         for (x = 0; x < QETH_DBF_INFOS; x++) {
5412                 debug_unregister(qeth_dbf[x].id);
5413                 qeth_dbf[x].id = NULL;
5414         }
5415 }
5416
5417 void qeth_dbf_longtext(debug_info_t *id, int level, char *fmt, ...)
5418 {
5419         char dbf_txt_buf[32];
5420         va_list args;
5421
5422         if (!debug_level_enabled(id, level))
5423                 return;
5424         va_start(args, fmt);
5425         vsnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
5426         va_end(args);
5427         debug_text_event(id, level, dbf_txt_buf);
5428 }
5429 EXPORT_SYMBOL_GPL(qeth_dbf_longtext);
5430
5431 static int qeth_register_dbf_views(void)
5432 {
5433         int ret;
5434         int x;
5435
5436         for (x = 0; x < QETH_DBF_INFOS; x++) {
5437                 /* register the areas */
5438                 qeth_dbf[x].id = debug_register(qeth_dbf[x].name,
5439                                                 qeth_dbf[x].pages,
5440                                                 qeth_dbf[x].areas,
5441                                                 qeth_dbf[x].len);
5442                 if (qeth_dbf[x].id == NULL) {
5443                         qeth_unregister_dbf_views();
5444                         return -ENOMEM;
5445                 }
5446
5447                 /* register a view */
5448                 ret = debug_register_view(qeth_dbf[x].id, qeth_dbf[x].view);
5449                 if (ret) {
5450                         qeth_unregister_dbf_views();
5451                         return ret;
5452                 }
5453
5454                 /* set a passing level */
5455                 debug_set_level(qeth_dbf[x].id, qeth_dbf[x].level);
5456         }
5457
5458         return 0;
5459 }
5460
5461 int qeth_core_load_discipline(struct qeth_card *card,
5462                 enum qeth_discipline_id discipline)
5463 {
5464         int rc = 0;
5465         mutex_lock(&qeth_mod_mutex);
5466         switch (discipline) {
5467         case QETH_DISCIPLINE_LAYER3:
5468                 card->discipline = try_then_request_module(
5469                         symbol_get(qeth_l3_discipline), "qeth_l3");
5470                 break;
5471         case QETH_DISCIPLINE_LAYER2:
5472                 card->discipline = try_then_request_module(
5473                         symbol_get(qeth_l2_discipline), "qeth_l2");
5474                 break;
5475         }
5476         if (!card->discipline) {
5477                 dev_err(&card->gdev->dev, "There is no kernel module to "
5478                         "support discipline %d\n", discipline);
5479                 rc = -EINVAL;
5480         }
5481         mutex_unlock(&qeth_mod_mutex);
5482         return rc;
5483 }
5484
5485 void qeth_core_free_discipline(struct qeth_card *card)
5486 {
5487         if (card->options.layer2)
5488                 symbol_put(qeth_l2_discipline);
5489         else
5490                 symbol_put(qeth_l3_discipline);
5491         card->discipline = NULL;
5492 }
5493
5494 const struct device_type qeth_generic_devtype = {
5495         .name = "qeth_generic",
5496         .groups = qeth_generic_attr_groups,
5497 };
5498 EXPORT_SYMBOL_GPL(qeth_generic_devtype);
5499
5500 static const struct device_type qeth_osn_devtype = {
5501         .name = "qeth_osn",
5502         .groups = qeth_osn_attr_groups,
5503 };
5504
5505 #define DBF_NAME_LEN    20
5506
5507 struct qeth_dbf_entry {
5508         char dbf_name[DBF_NAME_LEN];
5509         debug_info_t *dbf_info;
5510         struct list_head dbf_list;
5511 };
5512
5513 static LIST_HEAD(qeth_dbf_list);
5514 static DEFINE_MUTEX(qeth_dbf_list_mutex);
5515
5516 static debug_info_t *qeth_get_dbf_entry(char *name)
5517 {
5518         struct qeth_dbf_entry *entry;
5519         debug_info_t *rc = NULL;
5520
5521         mutex_lock(&qeth_dbf_list_mutex);
5522         list_for_each_entry(entry, &qeth_dbf_list, dbf_list) {
5523                 if (strcmp(entry->dbf_name, name) == 0) {
5524                         rc = entry->dbf_info;
5525                         break;
5526                 }
5527         }
5528         mutex_unlock(&qeth_dbf_list_mutex);
5529         return rc;
5530 }
5531
5532 static int qeth_add_dbf_entry(struct qeth_card *card, char *name)
5533 {
5534         struct qeth_dbf_entry *new_entry;
5535
5536         card->debug = debug_register(name, 2, 1, 8);
5537         if (!card->debug) {
5538                 QETH_DBF_TEXT_(SETUP, 2, "%s", "qcdbf");
5539                 goto err;
5540         }
5541         if (debug_register_view(card->debug, &debug_hex_ascii_view))
5542                 goto err_dbg;
5543         new_entry = kzalloc(sizeof(struct qeth_dbf_entry), GFP_KERNEL);
5544         if (!new_entry)
5545                 goto err_dbg;
5546         strncpy(new_entry->dbf_name, name, DBF_NAME_LEN);
5547         new_entry->dbf_info = card->debug;
5548         mutex_lock(&qeth_dbf_list_mutex);
5549         list_add(&new_entry->dbf_list, &qeth_dbf_list);
5550         mutex_unlock(&qeth_dbf_list_mutex);
5551
5552         return 0;
5553
5554 err_dbg:
5555         debug_unregister(card->debug);
5556 err:
5557         return -ENOMEM;
5558 }
5559
5560 static void qeth_clear_dbf_list(void)
5561 {
5562         struct qeth_dbf_entry *entry, *tmp;
5563
5564         mutex_lock(&qeth_dbf_list_mutex);
5565         list_for_each_entry_safe(entry, tmp, &qeth_dbf_list, dbf_list) {
5566                 list_del(&entry->dbf_list);
5567                 debug_unregister(entry->dbf_info);
5568                 kfree(entry);
5569         }
5570         mutex_unlock(&qeth_dbf_list_mutex);
5571 }
5572
5573 static int qeth_core_probe_device(struct ccwgroup_device *gdev)
5574 {
5575         struct qeth_card *card;
5576         struct device *dev;
5577         int rc;
5578         unsigned long flags;
5579         char dbf_name[DBF_NAME_LEN];
5580
5581         QETH_DBF_TEXT(SETUP, 2, "probedev");
5582
5583         dev = &gdev->dev;
5584         if (!get_device(dev))
5585                 return -ENODEV;
5586
5587         QETH_DBF_TEXT_(SETUP, 2, "%s", dev_name(&gdev->dev));
5588
5589         card = qeth_alloc_card();
5590         if (!card) {
5591                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM);
5592                 rc = -ENOMEM;
5593                 goto err_dev;
5594         }
5595
5596         snprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
5597                 dev_name(&gdev->dev));
5598         card->debug = qeth_get_dbf_entry(dbf_name);
5599         if (!card->debug) {
5600                 rc = qeth_add_dbf_entry(card, dbf_name);
5601                 if (rc)
5602                         goto err_card;
5603         }
5604
5605         card->read.ccwdev  = gdev->cdev[0];
5606         card->write.ccwdev = gdev->cdev[1];
5607         card->data.ccwdev  = gdev->cdev[2];
5608         dev_set_drvdata(&gdev->dev, card);
5609         card->gdev = gdev;
5610         gdev->cdev[0]->handler = qeth_irq;
5611         gdev->cdev[1]->handler = qeth_irq;
5612         gdev->cdev[2]->handler = qeth_irq;
5613
5614         rc = qeth_determine_card_type(card);
5615         if (rc) {
5616                 QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
5617                 goto err_card;
5618         }
5619         rc = qeth_setup_card(card);
5620         if (rc) {
5621                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
5622                 goto err_card;
5623         }
5624
5625         switch (card->info.type) {
5626         case QETH_CARD_TYPE_OSN:
5627         case QETH_CARD_TYPE_OSM:
5628                 rc = qeth_core_load_discipline(card, QETH_DISCIPLINE_LAYER2);
5629                 if (rc)
5630                         goto err_card;
5631
5632                 gdev->dev.type = (card->info.type != QETH_CARD_TYPE_OSN)
5633                                         ? card->discipline->devtype
5634                                         : &qeth_osn_devtype;
5635                 rc = card->discipline->setup(card->gdev);
5636                 if (rc)
5637                         goto err_disc;
5638                 break;
5639         default:
5640                 gdev->dev.type = &qeth_generic_devtype;
5641                 break;
5642         }
5643
5644         write_lock_irqsave(&qeth_core_card_list.rwlock, flags);
5645         list_add_tail(&card->list, &qeth_core_card_list.list);
5646         write_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
5647
5648         qeth_determine_capabilities(card);
5649         return 0;
5650
5651 err_disc:
5652         qeth_core_free_discipline(card);
5653 err_card:
5654         qeth_core_free_card(card);
5655 err_dev:
5656         put_device(dev);
5657         return rc;
5658 }
5659
5660 static void qeth_core_remove_device(struct ccwgroup_device *gdev)
5661 {
5662         unsigned long flags;
5663         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5664
5665         QETH_DBF_TEXT(SETUP, 2, "removedv");
5666
5667         if (card->discipline) {
5668                 card->discipline->remove(gdev);
5669                 qeth_core_free_discipline(card);
5670         }
5671
5672         write_lock_irqsave(&qeth_core_card_list.rwlock, flags);
5673         list_del(&card->list);
5674         write_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
5675         qeth_core_free_card(card);
5676         dev_set_drvdata(&gdev->dev, NULL);
5677         put_device(&gdev->dev);
5678         return;
5679 }
5680
5681 static int qeth_core_set_online(struct ccwgroup_device *gdev)
5682 {
5683         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5684         int rc = 0;
5685         int def_discipline;
5686
5687         if (!card->discipline) {
5688                 if (card->info.type == QETH_CARD_TYPE_IQD)
5689                         def_discipline = QETH_DISCIPLINE_LAYER3;
5690                 else
5691                         def_discipline = QETH_DISCIPLINE_LAYER2;
5692                 rc = qeth_core_load_discipline(card, def_discipline);
5693                 if (rc)
5694                         goto err;
5695                 rc = card->discipline->setup(card->gdev);
5696                 if (rc) {
5697                         qeth_core_free_discipline(card);
5698                         goto err;
5699                 }
5700         }
5701         rc = card->discipline->set_online(gdev);
5702 err:
5703         return rc;
5704 }
5705
5706 static int qeth_core_set_offline(struct ccwgroup_device *gdev)
5707 {
5708         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5709         return card->discipline->set_offline(gdev);
5710 }
5711
5712 static void qeth_core_shutdown(struct ccwgroup_device *gdev)
5713 {
5714         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5715         if (card->discipline && card->discipline->shutdown)
5716                 card->discipline->shutdown(gdev);
5717 }
5718
5719 static int qeth_core_prepare(struct ccwgroup_device *gdev)
5720 {
5721         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5722         if (card->discipline && card->discipline->prepare)
5723                 return card->discipline->prepare(gdev);
5724         return 0;
5725 }
5726
5727 static void qeth_core_complete(struct ccwgroup_device *gdev)
5728 {
5729         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5730         if (card->discipline && card->discipline->complete)
5731                 card->discipline->complete(gdev);
5732 }
5733
5734 static int qeth_core_freeze(struct ccwgroup_device *gdev)
5735 {
5736         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5737         if (card->discipline && card->discipline->freeze)
5738                 return card->discipline->freeze(gdev);
5739         return 0;
5740 }
5741
5742 static int qeth_core_thaw(struct ccwgroup_device *gdev)
5743 {
5744         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5745         if (card->discipline && card->discipline->thaw)
5746                 return card->discipline->thaw(gdev);
5747         return 0;
5748 }
5749
5750 static int qeth_core_restore(struct ccwgroup_device *gdev)
5751 {
5752         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5753         if (card->discipline && card->discipline->restore)
5754                 return card->discipline->restore(gdev);
5755         return 0;
5756 }
5757
5758 static struct ccwgroup_driver qeth_core_ccwgroup_driver = {
5759         .driver = {
5760                 .owner = THIS_MODULE,
5761                 .name = "qeth",
5762         },
5763         .setup = qeth_core_probe_device,
5764         .remove = qeth_core_remove_device,
5765         .set_online = qeth_core_set_online,
5766         .set_offline = qeth_core_set_offline,
5767         .shutdown = qeth_core_shutdown,
5768         .prepare = qeth_core_prepare,
5769         .complete = qeth_core_complete,
5770         .freeze = qeth_core_freeze,
5771         .thaw = qeth_core_thaw,
5772         .restore = qeth_core_restore,
5773 };
5774
5775 static ssize_t qeth_core_driver_group_store(struct device_driver *ddrv,
5776                                             const char *buf, size_t count)
5777 {
5778         int err;
5779
5780         err = ccwgroup_create_dev(qeth_core_root_dev,
5781                                   &qeth_core_ccwgroup_driver, 3, buf);
5782
5783         return err ? err : count;
5784 }
5785 static DRIVER_ATTR(group, 0200, NULL, qeth_core_driver_group_store);
5786
5787 static struct attribute *qeth_drv_attrs[] = {
5788         &driver_attr_group.attr,
5789         NULL,
5790 };
5791 static struct attribute_group qeth_drv_attr_group = {
5792         .attrs = qeth_drv_attrs,
5793 };
5794 static const struct attribute_group *qeth_drv_attr_groups[] = {
5795         &qeth_drv_attr_group,
5796         NULL,
5797 };
5798
5799 static struct {
5800         const char str[ETH_GSTRING_LEN];
5801 } qeth_ethtool_stats_keys[] = {
5802 /*  0 */{"rx skbs"},
5803         {"rx buffers"},
5804         {"tx skbs"},
5805         {"tx buffers"},
5806         {"tx skbs no packing"},
5807         {"tx buffers no packing"},
5808         {"tx skbs packing"},
5809         {"tx buffers packing"},
5810         {"tx sg skbs"},
5811         {"tx sg frags"},
5812 /* 10 */{"rx sg skbs"},
5813         {"rx sg frags"},
5814         {"rx sg page allocs"},
5815         {"tx large kbytes"},
5816         {"tx large count"},
5817         {"tx pk state ch n->p"},
5818         {"tx pk state ch p->n"},
5819         {"tx pk watermark low"},
5820         {"tx pk watermark high"},
5821         {"queue 0 buffer usage"},
5822 /* 20 */{"queue 1 buffer usage"},
5823         {"queue 2 buffer usage"},
5824         {"queue 3 buffer usage"},
5825         {"rx poll time"},
5826         {"rx poll count"},
5827         {"rx do_QDIO time"},
5828         {"rx do_QDIO count"},
5829         {"tx handler time"},
5830         {"tx handler count"},
5831         {"tx time"},
5832 /* 30 */{"tx count"},
5833         {"tx do_QDIO time"},
5834         {"tx do_QDIO count"},
5835         {"tx csum"},
5836         {"tx lin"},
5837         {"tx linfail"},
5838         {"cq handler count"},
5839         {"cq handler time"}
5840 };
5841
5842 int qeth_core_get_sset_count(struct net_device *dev, int stringset)
5843 {
5844         switch (stringset) {
5845         case ETH_SS_STATS:
5846                 return (sizeof(qeth_ethtool_stats_keys) / ETH_GSTRING_LEN);
5847         default:
5848                 return -EINVAL;
5849         }
5850 }
5851 EXPORT_SYMBOL_GPL(qeth_core_get_sset_count);
5852
5853 void qeth_core_get_ethtool_stats(struct net_device *dev,
5854                 struct ethtool_stats *stats, u64 *data)
5855 {
5856         struct qeth_card *card = dev->ml_priv;
5857         data[0] = card->stats.rx_packets -
5858                                 card->perf_stats.initial_rx_packets;
5859         data[1] = card->perf_stats.bufs_rec;
5860         data[2] = card->stats.tx_packets -
5861                                 card->perf_stats.initial_tx_packets;
5862         data[3] = card->perf_stats.bufs_sent;
5863         data[4] = card->stats.tx_packets - card->perf_stats.initial_tx_packets
5864                         - card->perf_stats.skbs_sent_pack;
5865         data[5] = card->perf_stats.bufs_sent - card->perf_stats.bufs_sent_pack;
5866         data[6] = card->perf_stats.skbs_sent_pack;
5867         data[7] = card->perf_stats.bufs_sent_pack;
5868         data[8] = card->perf_stats.sg_skbs_sent;
5869         data[9] = card->perf_stats.sg_frags_sent;
5870         data[10] = card->perf_stats.sg_skbs_rx;
5871         data[11] = card->perf_stats.sg_frags_rx;
5872         data[12] = card->perf_stats.sg_alloc_page_rx;
5873         data[13] = (card->perf_stats.large_send_bytes >> 10);
5874         data[14] = card->perf_stats.large_send_cnt;
5875         data[15] = card->perf_stats.sc_dp_p;
5876         data[16] = card->perf_stats.sc_p_dp;
5877         data[17] = QETH_LOW_WATERMARK_PACK;
5878         data[18] = QETH_HIGH_WATERMARK_PACK;
5879         data[19] = atomic_read(&card->qdio.out_qs[0]->used_buffers);
5880         data[20] = (card->qdio.no_out_queues > 1) ?
5881                         atomic_read(&card->qdio.out_qs[1]->used_buffers) : 0;
5882         data[21] = (card->qdio.no_out_queues > 2) ?
5883                         atomic_read(&card->qdio.out_qs[2]->used_buffers) : 0;
5884         data[22] = (card->qdio.no_out_queues > 3) ?
5885                         atomic_read(&card->qdio.out_qs[3]->used_buffers) : 0;
5886         data[23] = card->perf_stats.inbound_time;
5887         data[24] = card->perf_stats.inbound_cnt;
5888         data[25] = card->perf_stats.inbound_do_qdio_time;
5889         data[26] = card->perf_stats.inbound_do_qdio_cnt;
5890         data[27] = card->perf_stats.outbound_handler_time;
5891         data[28] = card->perf_stats.outbound_handler_cnt;
5892         data[29] = card->perf_stats.outbound_time;
5893         data[30] = card->perf_stats.outbound_cnt;
5894         data[31] = card->perf_stats.outbound_do_qdio_time;
5895         data[32] = card->perf_stats.outbound_do_qdio_cnt;
5896         data[33] = card->perf_stats.tx_csum;
5897         data[34] = card->perf_stats.tx_lin;
5898         data[35] = card->perf_stats.tx_linfail;
5899         data[36] = card->perf_stats.cq_cnt;
5900         data[37] = card->perf_stats.cq_time;
5901 }
5902 EXPORT_SYMBOL_GPL(qeth_core_get_ethtool_stats);
5903
5904 void qeth_core_get_strings(struct net_device *dev, u32 stringset, u8 *data)
5905 {
5906         switch (stringset) {
5907         case ETH_SS_STATS:
5908                 memcpy(data, &qeth_ethtool_stats_keys,
5909                         sizeof(qeth_ethtool_stats_keys));
5910                 break;
5911         default:
5912                 WARN_ON(1);
5913                 break;
5914         }
5915 }
5916 EXPORT_SYMBOL_GPL(qeth_core_get_strings);
5917
5918 void qeth_core_get_drvinfo(struct net_device *dev,
5919                 struct ethtool_drvinfo *info)
5920 {
5921         struct qeth_card *card = dev->ml_priv;
5922
5923         strlcpy(info->driver, card->options.layer2 ? "qeth_l2" : "qeth_l3",
5924                 sizeof(info->driver));
5925         strlcpy(info->version, "1.0", sizeof(info->version));
5926         strlcpy(info->fw_version, card->info.mcl_level,
5927                 sizeof(info->fw_version));
5928         snprintf(info->bus_info, sizeof(info->bus_info), "%s/%s/%s",
5929                  CARD_RDEV_ID(card), CARD_WDEV_ID(card), CARD_DDEV_ID(card));
5930 }
5931 EXPORT_SYMBOL_GPL(qeth_core_get_drvinfo);
5932
5933 /* Helper function to fill 'advertizing' and 'supported' which are the same. */
5934 /* Autoneg and full-duplex are supported and advertized uncondionally.       */
5935 /* Always advertize and support all speeds up to specified, and only one     */
5936 /* specified port type.                                                      */
5937 static void qeth_set_ecmd_adv_sup(struct ethtool_cmd *ecmd,
5938                                 int maxspeed, int porttype)
5939 {
5940         int port_sup, port_adv, spd_sup, spd_adv;
5941
5942         switch (porttype) {
5943         case PORT_TP:
5944                 port_sup = SUPPORTED_TP;
5945                 port_adv = ADVERTISED_TP;
5946                 break;
5947         case PORT_FIBRE:
5948                 port_sup = SUPPORTED_FIBRE;
5949                 port_adv = ADVERTISED_FIBRE;
5950                 break;
5951         default:
5952                 port_sup = SUPPORTED_TP;
5953                 port_adv = ADVERTISED_TP;
5954                 WARN_ON_ONCE(1);
5955         }
5956
5957         /* "Fallthrough" case'es ordered from high to low result in setting  */
5958         /* flags cumulatively, starting from the specified speed and down to */
5959         /* the lowest possible.                                              */
5960         spd_sup = 0;
5961         spd_adv = 0;
5962         switch (maxspeed) {
5963         case SPEED_10000:
5964                 spd_sup |= SUPPORTED_10000baseT_Full;
5965                 spd_adv |= ADVERTISED_10000baseT_Full;
5966         case SPEED_1000:
5967                 spd_sup |= SUPPORTED_1000baseT_Half | SUPPORTED_1000baseT_Full;
5968                 spd_adv |= ADVERTISED_1000baseT_Half |
5969                                                 ADVERTISED_1000baseT_Full;
5970         case SPEED_100:
5971                 spd_sup |= SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full;
5972                 spd_adv |= ADVERTISED_100baseT_Half | ADVERTISED_100baseT_Full;
5973         case SPEED_10:
5974                 spd_sup |= SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full;
5975                 spd_adv |= ADVERTISED_10baseT_Half | ADVERTISED_10baseT_Full;
5976         break;
5977         default:
5978                 spd_sup = SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full;
5979                 spd_adv = ADVERTISED_10baseT_Half | ADVERTISED_10baseT_Full;
5980                 WARN_ON_ONCE(1);
5981         }
5982         ecmd->advertising = ADVERTISED_Autoneg | port_adv | spd_adv;
5983         ecmd->supported = SUPPORTED_Autoneg | port_sup | spd_sup;
5984 }
5985
5986 int qeth_core_ethtool_get_settings(struct net_device *netdev,
5987                                         struct ethtool_cmd *ecmd)
5988 {
5989         struct qeth_card *card = netdev->ml_priv;
5990         enum qeth_link_types link_type;
5991         struct carrier_info carrier_info;
5992         int rc;
5993         u32 speed;
5994
5995         if ((card->info.type == QETH_CARD_TYPE_IQD) || (card->info.guestlan))
5996                 link_type = QETH_LINK_TYPE_10GBIT_ETH;
5997         else
5998                 link_type = card->info.link_type;
5999
6000         ecmd->transceiver = XCVR_INTERNAL;
6001         ecmd->duplex = DUPLEX_FULL;
6002         ecmd->autoneg = AUTONEG_ENABLE;
6003
6004         switch (link_type) {
6005         case QETH_LINK_TYPE_FAST_ETH:
6006         case QETH_LINK_TYPE_LANE_ETH100:
6007                 qeth_set_ecmd_adv_sup(ecmd, SPEED_100, PORT_TP);
6008                 speed = SPEED_100;
6009                 ecmd->port = PORT_TP;
6010                 break;
6011
6012         case QETH_LINK_TYPE_GBIT_ETH:
6013         case QETH_LINK_TYPE_LANE_ETH1000:
6014                 qeth_set_ecmd_adv_sup(ecmd, SPEED_1000, PORT_FIBRE);
6015                 speed = SPEED_1000;
6016                 ecmd->port = PORT_FIBRE;
6017                 break;
6018
6019         case QETH_LINK_TYPE_10GBIT_ETH:
6020                 qeth_set_ecmd_adv_sup(ecmd, SPEED_10000, PORT_FIBRE);
6021                 speed = SPEED_10000;
6022                 ecmd->port = PORT_FIBRE;
6023                 break;
6024
6025         default:
6026                 qeth_set_ecmd_adv_sup(ecmd, SPEED_10, PORT_TP);
6027                 speed = SPEED_10;
6028                 ecmd->port = PORT_TP;
6029         }
6030         ethtool_cmd_speed_set(ecmd, speed);
6031
6032         /* Check if we can obtain more accurate information.     */
6033         /* If QUERY_CARD_INFO command is not supported or fails, */
6034         /* just return the heuristics that was filled above.     */
6035         if (!qeth_card_hw_is_reachable(card))
6036                 return -ENODEV;
6037         rc = qeth_query_card_info(card, &carrier_info);
6038         if (rc == -EOPNOTSUPP) /* for old hardware, return heuristic */
6039                 return 0;
6040         if (rc) /* report error from the hardware operation */
6041                 return rc;
6042         /* on success, fill in the information got from the hardware */
6043
6044         netdev_dbg(netdev,
6045         "card info: card_type=0x%02x, port_mode=0x%04x, port_speed=0x%08x\n",
6046                         carrier_info.card_type,
6047                         carrier_info.port_mode,
6048                         carrier_info.port_speed);
6049
6050         /* Update attributes for which we've obtained more authoritative */
6051         /* information, leave the rest the way they where filled above.  */
6052         switch (carrier_info.card_type) {
6053         case CARD_INFO_TYPE_1G_COPPER_A:
6054         case CARD_INFO_TYPE_1G_COPPER_B:
6055                 qeth_set_ecmd_adv_sup(ecmd, SPEED_1000, PORT_TP);
6056                 ecmd->port = PORT_TP;
6057                 break;
6058         case CARD_INFO_TYPE_1G_FIBRE_A:
6059         case CARD_INFO_TYPE_1G_FIBRE_B:
6060                 qeth_set_ecmd_adv_sup(ecmd, SPEED_1000, PORT_FIBRE);
6061                 ecmd->port = PORT_FIBRE;
6062                 break;
6063         case CARD_INFO_TYPE_10G_FIBRE_A:
6064         case CARD_INFO_TYPE_10G_FIBRE_B:
6065                 qeth_set_ecmd_adv_sup(ecmd, SPEED_10000, PORT_FIBRE);
6066                 ecmd->port = PORT_FIBRE;
6067                 break;
6068         }
6069
6070         switch (carrier_info.port_mode) {
6071         case CARD_INFO_PORTM_FULLDUPLEX:
6072                 ecmd->duplex = DUPLEX_FULL;
6073                 break;
6074         case CARD_INFO_PORTM_HALFDUPLEX:
6075                 ecmd->duplex = DUPLEX_HALF;
6076                 break;
6077         }
6078
6079         switch (carrier_info.port_speed) {
6080         case CARD_INFO_PORTS_10M:
6081                 speed = SPEED_10;
6082                 break;
6083         case CARD_INFO_PORTS_100M:
6084                 speed = SPEED_100;
6085                 break;
6086         case CARD_INFO_PORTS_1G:
6087                 speed = SPEED_1000;
6088                 break;
6089         case CARD_INFO_PORTS_10G:
6090                 speed = SPEED_10000;
6091                 break;
6092         }
6093         ethtool_cmd_speed_set(ecmd, speed);
6094
6095         return 0;
6096 }
6097 EXPORT_SYMBOL_GPL(qeth_core_ethtool_get_settings);
6098
6099 static int qeth_send_checksum_on(struct qeth_card *card, int cstype)
6100 {
6101         long rxtx_arg;
6102         int rc;
6103
6104         rc = qeth_send_simple_setassparms(card, cstype, IPA_CMD_ASS_START, 0);
6105         if (rc) {
6106                 dev_warn(&card->gdev->dev,
6107                          "Starting HW checksumming for %s failed, using SW checksumming\n",
6108                          QETH_CARD_IFNAME(card));
6109                 return rc;
6110         }
6111         rxtx_arg = (cstype == IPA_OUTBOUND_CHECKSUM) ? card->info.tx_csum_mask
6112                                                      : card->info.csum_mask;
6113         rc = qeth_send_simple_setassparms(card, cstype, IPA_CMD_ASS_ENABLE,
6114                                           rxtx_arg);
6115         if (rc) {
6116                 dev_warn(&card->gdev->dev,
6117                          "Enabling HW checksumming for %s failed, using SW checksumming\n",
6118                          QETH_CARD_IFNAME(card));
6119                 return rc;
6120         }
6121
6122         dev_info(&card->gdev->dev, "HW Checksumming (%sbound) enabled\n",
6123                  cstype == IPA_INBOUND_CHECKSUM ? "in" : "out");
6124         return 0;
6125 }
6126
6127 static int qeth_set_ipa_csum(struct qeth_card *card, int on, int cstype)
6128 {
6129         int rc;
6130
6131         if (on) {
6132                 rc = qeth_send_checksum_on(card, cstype);
6133                 if (rc)
6134                         return -EIO;
6135         } else {
6136                 rc = qeth_send_simple_setassparms(card, cstype,
6137                                                   IPA_CMD_ASS_STOP, 0);
6138                 if (rc)
6139                         return -EIO;
6140         }
6141         return 0;
6142 }
6143
6144 static int qeth_set_ipa_tso(struct qeth_card *card, int on)
6145 {
6146         int rc;
6147
6148         QETH_CARD_TEXT(card, 3, "sttso");
6149
6150         if (on) {
6151                 rc = qeth_send_simple_setassparms(card, IPA_OUTBOUND_TSO,
6152                                                   IPA_CMD_ASS_START, 0);
6153                 if (rc) {
6154                         dev_warn(&card->gdev->dev,
6155                                  "Starting outbound TCP segmentation offload for %s failed\n",
6156                                  QETH_CARD_IFNAME(card));
6157                         return -EIO;
6158                 }
6159                 dev_info(&card->gdev->dev, "Outbound TSO enabled\n");
6160         } else {
6161                 rc = qeth_send_simple_setassparms(card, IPA_OUTBOUND_TSO,
6162                                                   IPA_CMD_ASS_STOP, 0);
6163         }
6164         return rc;
6165 }
6166
6167 /* try to restore device features on a device after recovery */
6168 int qeth_recover_features(struct net_device *dev)
6169 {
6170         struct qeth_card *card = dev->ml_priv;
6171         netdev_features_t recover = dev->features;
6172
6173         if (recover & NETIF_F_IP_CSUM) {
6174                 if (qeth_set_ipa_csum(card, 1, IPA_OUTBOUND_CHECKSUM))
6175                         recover ^= NETIF_F_IP_CSUM;
6176         }
6177         if (recover & NETIF_F_RXCSUM) {
6178                 if (qeth_set_ipa_csum(card, 1, IPA_INBOUND_CHECKSUM))
6179                         recover ^= NETIF_F_RXCSUM;
6180         }
6181         if (recover & NETIF_F_TSO) {
6182                 if (qeth_set_ipa_tso(card, 1))
6183                         recover ^= NETIF_F_TSO;
6184         }
6185
6186         if (recover == dev->features)
6187                 return 0;
6188
6189         dev_warn(&card->gdev->dev,
6190                  "Device recovery failed to restore all offload features\n");
6191         dev->features = recover;
6192         return -EIO;
6193 }
6194 EXPORT_SYMBOL_GPL(qeth_recover_features);
6195
6196 int qeth_set_features(struct net_device *dev, netdev_features_t features)
6197 {
6198         struct qeth_card *card = dev->ml_priv;
6199         netdev_features_t changed = dev->features ^ features;
6200         int rc = 0;
6201
6202         QETH_DBF_TEXT(SETUP, 2, "setfeat");
6203         QETH_DBF_HEX(SETUP, 2, &features, sizeof(features));
6204
6205         if ((changed & NETIF_F_IP_CSUM)) {
6206                 rc = qeth_set_ipa_csum(card,
6207                                        features & NETIF_F_IP_CSUM ? 1 : 0,
6208                                        IPA_OUTBOUND_CHECKSUM);
6209                 if (rc)
6210                         changed ^= NETIF_F_IP_CSUM;
6211         }
6212         if ((changed & NETIF_F_RXCSUM)) {
6213                 rc = qeth_set_ipa_csum(card,
6214                                         features & NETIF_F_RXCSUM ? 1 : 0,
6215                                         IPA_INBOUND_CHECKSUM);
6216                 if (rc)
6217                         changed ^= NETIF_F_RXCSUM;
6218         }
6219         if ((changed & NETIF_F_TSO)) {
6220                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO ? 1 : 0);
6221                 if (rc)
6222                         changed ^= NETIF_F_TSO;
6223         }
6224
6225         /* everything changed successfully? */
6226         if ((dev->features ^ features) == changed)
6227                 return 0;
6228         /* something went wrong. save changed features and return error */
6229         dev->features ^= changed;
6230         return -EIO;
6231 }
6232 EXPORT_SYMBOL_GPL(qeth_set_features);
6233
6234 netdev_features_t qeth_fix_features(struct net_device *dev,
6235                                     netdev_features_t features)
6236 {
6237         struct qeth_card *card = dev->ml_priv;
6238
6239         QETH_DBF_TEXT(SETUP, 2, "fixfeat");
6240         if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM))
6241                 features &= ~NETIF_F_IP_CSUM;
6242         if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
6243                 features &= ~NETIF_F_RXCSUM;
6244         if (!qeth_is_supported(card, IPA_OUTBOUND_TSO)) {
6245                 features &= ~NETIF_F_TSO;
6246                 dev_info(&card->gdev->dev, "Outbound TSO not supported on %s\n",
6247                          QETH_CARD_IFNAME(card));
6248         }
6249         /* if the card isn't up, remove features that require hw changes */
6250         if (card->state == CARD_STATE_DOWN ||
6251             card->state == CARD_STATE_RECOVER)
6252                 features = features & ~(NETIF_F_IP_CSUM | NETIF_F_RXCSUM |
6253                                         NETIF_F_TSO);
6254         QETH_DBF_HEX(SETUP, 2, &features, sizeof(features));
6255         return features;
6256 }
6257 EXPORT_SYMBOL_GPL(qeth_fix_features);
6258
6259 netdev_features_t qeth_features_check(struct sk_buff *skb,
6260                                       struct net_device *dev,
6261                                       netdev_features_t features)
6262 {
6263         /* GSO segmentation builds skbs with
6264          *      a (small) linear part for the headers, and
6265          *      page frags for the data.
6266          * Compared to a linear skb, the header-only part consumes an
6267          * additional buffer element. This reduces buffer utilization, and
6268          * hurts throughput. So compress small segments into one element.
6269          */
6270         if (netif_needs_gso(skb, features)) {
6271                 /* match skb_segment(): */
6272                 unsigned int doffset = skb->data - skb_mac_header(skb);
6273                 unsigned int hsize = skb_shinfo(skb)->gso_size;
6274                 unsigned int hroom = skb_headroom(skb);
6275
6276                 /* linearize only if resulting skb allocations are order-0: */
6277                 if (SKB_DATA_ALIGN(hroom + doffset + hsize) <= SKB_MAX_HEAD(0))
6278                         features &= ~NETIF_F_SG;
6279         }
6280
6281         return vlan_features_check(skb, features);
6282 }
6283 EXPORT_SYMBOL_GPL(qeth_features_check);
6284
6285 static int __init qeth_core_init(void)
6286 {
6287         int rc;
6288
6289         pr_info("loading core functions\n");
6290         INIT_LIST_HEAD(&qeth_core_card_list.list);
6291         INIT_LIST_HEAD(&qeth_dbf_list);
6292         rwlock_init(&qeth_core_card_list.rwlock);
6293         mutex_init(&qeth_mod_mutex);
6294
6295         qeth_wq = create_singlethread_workqueue("qeth_wq");
6296
6297         rc = qeth_register_dbf_views();
6298         if (rc)
6299                 goto out_err;
6300         qeth_core_root_dev = root_device_register("qeth");
6301         rc = PTR_ERR_OR_ZERO(qeth_core_root_dev);
6302         if (rc)
6303                 goto register_err;
6304         qeth_core_header_cache = kmem_cache_create("qeth_hdr",
6305                         sizeof(struct qeth_hdr) + ETH_HLEN, 64, 0, NULL);
6306         if (!qeth_core_header_cache) {
6307                 rc = -ENOMEM;
6308                 goto slab_err;
6309         }
6310         qeth_qdio_outbuf_cache = kmem_cache_create("qeth_buf",
6311                         sizeof(struct qeth_qdio_out_buffer), 0, 0, NULL);
6312         if (!qeth_qdio_outbuf_cache) {
6313                 rc = -ENOMEM;
6314                 goto cqslab_err;
6315         }
6316         rc = ccw_driver_register(&qeth_ccw_driver);
6317         if (rc)
6318                 goto ccw_err;
6319         qeth_core_ccwgroup_driver.driver.groups = qeth_drv_attr_groups;
6320         rc = ccwgroup_driver_register(&qeth_core_ccwgroup_driver);
6321         if (rc)
6322                 goto ccwgroup_err;
6323
6324         return 0;
6325
6326 ccwgroup_err:
6327         ccw_driver_unregister(&qeth_ccw_driver);
6328 ccw_err:
6329         kmem_cache_destroy(qeth_qdio_outbuf_cache);
6330 cqslab_err:
6331         kmem_cache_destroy(qeth_core_header_cache);
6332 slab_err:
6333         root_device_unregister(qeth_core_root_dev);
6334 register_err:
6335         qeth_unregister_dbf_views();
6336 out_err:
6337         pr_err("Initializing the qeth device driver failed\n");
6338         return rc;
6339 }
6340
6341 static void __exit qeth_core_exit(void)
6342 {
6343         qeth_clear_dbf_list();
6344         destroy_workqueue(qeth_wq);
6345         ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver);
6346         ccw_driver_unregister(&qeth_ccw_driver);
6347         kmem_cache_destroy(qeth_qdio_outbuf_cache);
6348         kmem_cache_destroy(qeth_core_header_cache);
6349         root_device_unregister(qeth_core_root_dev);
6350         qeth_unregister_dbf_views();
6351         pr_info("core functions removed\n");
6352 }
6353
6354 module_init(qeth_core_init);
6355 module_exit(qeth_core_exit);
6356 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
6357 MODULE_DESCRIPTION("qeth core functions");
6358 MODULE_LICENSE("GPL");